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TESTA300 Release 2021-05-25
Send your 1.b4 games to me, please. Thank you! /Marek
Marek Trokenheim's homepage
(c) Marek Trokenheim

1.b4 a5

(...)

2.a3 b6 3.ba5 (3.b5 Nf6=) 3...Ra5 4.Bb2 e6 5.e3 Nf6 6.c4 d5 7.cd5 Qd5 (7...ed5 8.Nf3=+) 8.Nf3= Ba6 (8...Bb7 9.Qc2 Bd6 10.Bc3=) 9.Ba6 Ra6 (worse 9...Na6 10.Bc3+–) 10.Bf6 gf6 11.Nc3 Qd3 12.Qe2 (12.Nd4 A) worse 12...Ba3 13.Ndb5 Bb2 14.Nc7 Ke7 15.Na6 Ba1 16.Nb4+– (16.Qa1?! Na6 17.Qa3 Nc5=); B) 12...c6=) 12...Qe2=+ 13.Ne2 (13.Ke2 Rg8=+) 13...Ba3–/+ 14.0–0 Bb2 (14...b5!?–/+) 15.Ra6= Na6 16.Rb1 (better 16.d4 Nb8 17.Rb1=+) 16...Ba3?? (better 16...Be5=+) 17.Ra1+– Ke7 18.Ra3 Nc5 19.Ra1 Rb8 20.d4 Ne4 21.Rc1 Kd7 22.Nc3 Nc3 23.Rc3 b5 24.h3 (24.Ne1 Kd6+–) 24...b4 25.Rb3 Kd6 26.Nd2 Kd5 27.f3 c5 28.dc5 Kc5 29.Kf2 Rd8 30.Ke2 e5 (30...f5 31.Rd3 Rg8 32.g4+–) 31.Ne4 (31.g4 Ra8+–) 31...Kc4 32.Rb1 b3 (32...f5 33.Nd2 Kb5 34.g4+–) 33.Nf6 (33.Nd2 Kc3 34.Rc1 Kb4+–) 33...Kc3 34.Ne4?? (better 34.Rc1 Kb4 35.Rc7+– (35.Nh7?! b2 36.Rb1 Kc3+=)) 34...Kc2=+ 35.Rb3 Kb3 36.Kf2 (36.Ng5 f5 37.g4 fg4 38.hg4 Rd7=) 36...Rg8 (36...f5 37.Ng3 Rf8 38.f4–/+) 37.g3 (37.Nf6 Rh8=) 37...Kc4 (37...f5 38.Nf6 Rg7 39.f4 ef4 40.ef4=+) 38.g4 (better 38.Nd6 Kd5 39.Nf7=) 38...Kd5?? (38...Rg6 39.f4=+) 39.Kg3 (better 39.Nf6 Kd6 40.Ng8+–) 39...Ke6 40.Ng5?? (40.f4 h6=+) 40...Kf6 (better 40...Rg5 41.e4 Rg8–+) 41.f4=+ ef4 42.ef4 h6 43.Nh7?? (better 43.Ne4 Ke6 44.Kh4=+) 43...Kg6–+ 44.Ng5 hg5 45.fg5 (45.f5 Kf6–+) 45...Kg5 46.h4 Kg6 47.h5 (47.Kf4 Ra8–+) 47...Kf6 (47...Kg5 48.h6–+) 48.Kh4 (48.Kf4 Ra8 49.g5 Ke6–+) 48...Ke5 49.g5 f6 (49...Kf4 50.h6–+) 50.Kg4 (50.g6 Kf5–+) 50...fg5 51.h6 Rg6 52.Kh5 Kf5 (52...Rh6 53.Kg4 Rc6 54.Kf3 Kf5 55.Ke3 Re6 56.Kd2 g4 57.Kc2 g3 58.Kb3 g2 59.Kb4 Rb6 60.Kc5 g1Q 61.Kd5 Qg4 62.Kc5 Qb4 63.Kd5 Rd6) 53.h7+– 1–0. alddhsfd (2090) – chessprofessor01 (1990), lichess.org, 2021.

2.a3 e6 3.ba5 Ra5 4.Bb2 f6 5.e3 e5 6.Be2 Ne7 7.c4 Ng6 8.Nc3 d6 9.Nd5 Be6 10.f4 Bd5 11.cd5 Rd5 12.fe5 Ne5 13.Nf3 Ng6 14.0–0 Be7 15.Nd4 c5 16.Bc4 Rh5 17.Ne6 Qb6 18.Ng7 Kd7 19.Nh5 Qb2 20.Rb1 Qe5 21.Qa4 Kc7 22.Ng7 d5 23.Bb5 f5 24.Be8 Qg7 25.Qa5 Kd6 26.Rb6 Ke5 27.d4 cd4 28.ed4 Ke4 29.Re1 Kf4 30.Rf1 Kg4 31.Bg6 Qd4 32.Kh1 hg6 33.h3 Kh5 34.Qb4 Bb4 35.Rb4 Qd3 36.Rff4 Qa3 37.g4 fg4 38.Rg4 Nc6 39.Rh4 Kg5 40.Rbg4 Kf5 41.Rf4 Ke5 42.Ra4 Qf3 43.Kh2 Qf2 44.Kh1 Rh4 45.Rh4 Qh4 0–1. Nautiluschess – patc, ICS blitz, 2001.

2.Ba3 b5 3.Nf3 e6 4.ba5 b4 (better 4...Ba3 5.Na3 Ra5=+) 5.c3?? (better 5.Bb2=) 5...ba3–+ 6.e3 Ra5 7.g3 Nf6 8.Bg2 g6 (8...Ba6 9.d4–+) 9.0–0 Bg7 10.Qb3 Nc6 (10...Ba6 11.Rc1–+) 11.Na3 0–0 12.Nc4 d5 (12...Ra6 13.d4–+) 13.Nce5? (better 13.Na5 Na5 14.Qb4–/+) 13...Ne5–+ 14.Ne5 Qd6 15.d4 Nd7 16.f4 Ba6 (16...Be5?! 17.fe5 Qb6 18.Qc2–+) 17.Rf2 Rb8 18.Qc2 Nb6 19.Nd3 Bd3 20.Qd3 Nc4 21.Bf1 (21.e4 c5–+) 21...Nb2 (better 21...c5!? 22.h3–+) 22.Qd2 c5 23.Qc1 Na4 24.Rb2 (24.Bd3–+) 24...Rb2 25.Bd3 cd4 26.cd4 Qa3 27.Qd1 (27.Bf1 Nc3 28.f5 Na2 29.Qc8 Bf8–+) 27...Nc3 28.Qf1 Ne4 (better 28...Ne2 29.Be2 Qe3 30.Qf2 Qe2 31.Qe2 Re2–+) 29.Bb1 (29.Rb1 Nd2 30.Rb2 Nf1 31.Rb3–+) 29...Qe3 30.Kh1 Nf2 31.Kg1 (31.Kg2 Ng4 32.Bc2 Rc2 33.Qf2 Qf2 34.Kh3 Qh2 35.Kg4 Qh5) 31...Ng4 32.Kh1 (32.Qf2 Qf2 33.Kh1 Qh2) 2…Rh2 0–1. workchess – ctrotter, net–chess.com, 2020.

2.Ba3 e5 (--> 1.b4 e5 2.Ba3 a5).

2.a4 ab4 3.Bb2 Nf6 4.Bf6 (4.Nf3 d6–/+) 4...gf6 (4...ef6 5.e4–/+) 5.e4 Nc6 6.Bb5 Rg8 7.g3 Nd4 8.Bc4 (8.Bd3 Bg7–/+) 8...d5 (better is 8...b5 9.Bb3 Bb7–+) 9.c3?? (better is 9.Bd5 e6 10.Ba2–/+) 9...dc4–+ 10.cd4 (10.cb4 e5 11.Na3–+) 10...Qd4 11.Ra2 (11.d3 Qa1 12.dc4–+) 11...Qe4 12.Kf1 Qh1 13.h4 Bh3 14.Ke2 (14.Ke1 Rg3! 15.Ra3 Qg1 16.Ke2 Bg4 17.Rf3 Bf3 18.Ke3 e5 19.Qg1 Bh6) 14…Qe4# 0–1. Castletyme – Pcmvr (2080), internet, 2008.

2.ba5 e6 3.a6 (--> 1.b4 e6 2.b5 a6 3.ba6).

2.ba5 h5 3.a6 Na6 4.e3 Nf6 5.Qe2 h4 6.g3 (better is 6.Bb2!?+=) 6...hg3–/+ 7.fg3 ½–½. Petenev,Konstantin (2255) – Dzhumagaliev,Yan (2300), Novosibirsk Region–ch final, 2008.

2.Bb2 a4 3.a3 Nf6 4.g4 (better 4.e3=) 4...g6?? (better 4...Ng4 5.e4 d6=+) 5.g5+– Bg7 (5...d6 6.gf6 e5 7.Bg2+–) 6.gf6 Bf6 (6...ef6 7.Bg2+–) 7.c3 (7.Bf6 ef6 8.Nf3 d5+–) 7...Nc6 (7...d5 8.Bg2+–) 8.b5 (better 8.e3+–) 8...0–0?? (8...Nb8 9.d4+–) 9.Bg2 (better 9.bc6 bc6 10.Ra2+–) 9...Ne5 10.d4 Ng4 (better 10...Nc4 11.Nd2 Nb2+–) 11.f3?? (11.e4 d6 12.h3 Nh6+–) 11...Nh6?? (better 11...Ne3 12.Qd3 Ng2 13.Kd1 d5–+) 12.Nh3 (12.e4 Bh4 13.Ke2 d5+–) 12...d5 13.c4 (better 13.Qd3!?+–) 13...Nf5+= 14.cd5?? (better 14.Qd2 dc4 15.e3+=) 14...Ne3–+ 15.Qd2 Ng2 16.Kf2 (16.Kd1 Bh3 17.Nc3–+) 16...Nh4 (16...Bh3 17.Rd1–+) 17.Qh6?? (better 17.Nf4–/+) 17...Nf5 (better 17...Qd5 18.Qd2 Bh3–+) 18.Ng5 (18.Qd2 Qd5 19.e4 Bd4 20.Bd4 Qd4 21.Qd4 Nd4 22.Nf4–+) 18...Nh6 19.d6 cd6 (better 19...Bg5 20.dc7 Qc7 21.Nc3–+) 20.h4 Qb6 21.h5 Bd4 22.Ke1 Bb2 23.hg6 fg6 24.Ne6 Be6 25.Rh6 Ba1 (25...Qg1 26.Kd2 Qc1 27.Kd3 Bc4 28.Ke4 Qf4) 26.Nd2 Bg7 (26...Qg1 27.Nf1 Bc3 28.Kd1 Bb3 29.Kc1 Qf1) 27.Ne4 Bb3 (27...Qg1 28.Kd2 Bh6 29.Ng5 Bg5 30.f4 Bf4 31.Kc3 Qe3 32.Kc2 Qb3) 28.Nf6 Rf6 29.Rh7 (29.Kf1 Rc8 30.Kg2 Qe3 31.b6 Qe2 32.Kg3 Rf3 33.Kh4 Qe4 34.Kg5 Bf6) 29...Rc8 (29...Qg1 30.Kd2 Qd1 31.Ke3 Re6 32.Kf4 Be5 33.Kg4 Qg1 34.Kh4 Qg3) 30.Rg7 (30.Kd2 Qd4 31.Ke1 Rc1) 30...Kg7 31.Kf1 Qc5 (31...Rc1 32.Kg2 Qg1 33.Kh3 Be6 34.Kh4 Rf4) 32.Kg2 Qc1 (32...Qg5 33.Kf2 Rc1 34.f4 Qf4 35.Kg2 Qf2 36.Kh3 Be6) 33.Kh3 (33.Kh2 Qg5 34.f4 Rh8) 33...Rc4 (33...Qg5 34.f4 Rh8) 34.Kg3 (34.Kg2 Qe3 35.Kg3 Qe2 36.f4 Rc3 37.Kh4 Qh5) 34...Rf5 (34...Qg1 35.Kh3 Rf8 36.f4 Rh8) 35.f4 (35.Kh2 Rh5 36.Kg2 Rg5 37.Kf2 Qg1) 35...Rcf4 (35...Qg1 36.Kf3 Rcf4) 36.e3 (36.Kh3 Rg5 37.e4 Qh1) 36...Qc3 (36...Qg1 37.Kh3 Rh5) 37.Kg2 (37.Kh2 Rf2 38.Kg3 Qe3 39.Kg4 R2f4) 37...Qe3 38.Kh2 Qe2 (38...Rf2 39.Kh1 Qe1) 39.Kh3 (39.Kg3 Rf3 40.Kh4 Qe4) 39...Qg4 40.Kh2 Rh5 0–1. Agiant – ygaignotas, lichess.org, 2019.

2.Bb2 b6 3.a3 Bb7 4.f3 Nf6 5.e4 d6 6.Qe2 e5 7.Qf2 c5 8.Bb5 Bc6 9.Bc4 b5 10.Bb3 c4 11.Ba2 Be7 12.Nh3 0–0 13.Ng5 h6 14.Nh3 a4 15.0–0 d5 16.d3 de4 17.fe4 cd3 18.cd3 Bd6 19.Nd2 Bd7 20.Nf3 Bh3 21.gh3 Re8 22.Nh4 Nc6 23.Qg2 Bf8 24.Nf5 Kh7 25.Bf7 Qd3 26.Qg6 Kh8 27.Be8 Rc8 28.Bc6 Rc6 29.Be5 Ne4 30.Rad1 Rg6 31.Kh1 Qh3 32.Rd8 Qg2# 0–1. ronnieg – vigocontrito, fics, Oklahoma City, 2001.

2.Bb2 d5 3.b5 (--> 1.b4 a5 2.b5 d5 3.Bb2).

2.b5 Nc6?? 3.Bb2?? (3.bc6 dc6 4.Bb2 Nf6+–) 3...Nb4? (3...Nb8 4.e4+=) 4.a3?? (better 4.e4+–) 4...Nd5+= 5.c4 (5.e4 Nb6+=) 5...Ndf6 6.e3 g6 (6...d6 7.d4+=) 7.Nf3 Bg7 8.Be2 d6 9.0–0 e5 10.d4 ed4 11.Nd4 Ne7 12.Nc3 0–0 13.a4 c5 (13...Nf5 14.Nd5+=) 14.Nb3 Be6 15.Rc1 (better 15.Qd3+=) 15...d5? (better 15...Nc8+=) 16.Nc5+– dc4 (16...b6 17.Ne6 fe6 18.cd5 Nfd5 19.Bc4+–) 17.Ne6 (17.Nb7?! Qb6 18.Ba3 Qb7+=) 17...Qd1 (17...fe6 18.Bc4 Ned5 19.Qb3+–) 18.Rfd1 (18.Rcd1 fe6 19.Bc4 Kf7+–) 18...fe6 19.Bc4 Kf7 20.Ba3 (better 20.Rd6 Nfd5 21.Bd5 (21.Nd5?! Bb2 22.Ne7 Bc1+=) 21...ed5 22.Rd7 Bc3 23.Rc3+–) 20...Rac8+– 21.Ne2 Rfd8 22.Rd8 Rd8 23.Nf4 (23.Be7 Ke7 24.Nd4 Rc8 25.Ne6 Bh6+–) 23...Ned5+– 24.Bd5 ed5? (better 24...Nd5 25.Nd5 Rd5+–) 25.Rc7+– Rd7 26.Rd7 (26.b6!? d4 27.ed4 Bf8+–) 26...Nd7 27.Nd5 The passed pawn on e3 will become decisive later 27...Ke6 28.Nf4 (28.e4 g5+–) 28...Kf5 (28...Kf7 29.Bd6+–) 29.f3 g5 (29...Ba1 30.Bd6+–) 30.g4 Ke5 31.Nh5 Bh6 32.Bb2 (32.Kf2 Kd5 33.Ng3 Kc4+–) 32...Kd5 33.Nf6 Nf6 34.Bf6 Kc4 35.h4 (better 35.e4!?+–) 35...gh4+– 36.g5 The passed pawn on f3 will quickly become a dangerous weapon (36.Kf2!?+–) 36...Bf8+= 37.e4 Kb4 38.e5 Ka4 39.b6 (39.e6!?+=) 39...Kb5= 40.e6 a4 (40...Bc5 41.Kg2 Kc6+–) 41.e7+– Be7 42.Be7 Kb6 43.f4 Kc6 44.f5 Kd7 (44...Kd5 45.Kh2+–) 45.f6 Ke6 46.Kh2 a3 47.Kh3?? (47.Ba3 h6 48.Kh3 hg5 49.Bb2=) 47...a2–+ 48.f7 (48.Kh4 a1Q–+) 48...Kf7 (better 48...Ke7 49.Kh4 Kf7–+) 49.Bf6 h6 50.Kh4 (50.gh6 Theme: Deflection from f6 50...Kf6) 50...hg5 (better 50...Kg6 51.Kg4–+) 51.Kg5 b5?? (51...Ke6 52.Bg7–+) 52.Ba1?? (52.Kf5 Kg8=) 52...b4?? (better 52...Ke6–+) 53.Kf5 b3 54.Ke4 Ke6 55.Kd4 b2 Do you see the mate threat? 56.Bb2 a1Q 57.Ba1 ½–½. BeepBeepImAJeep (2455) – Dragonator (2120), lichess.org, 2019.

2.b5 g5 3.Bb2 Nf6 4.e3 (better 4.e4+=) 4...g4? (4...Bg7 5.Nf3+=) 5.c4 (5.Bf6!? ef6 6.Qg4+–) 5...h5 (5...Bg7 6.Be2 Rg8 7.Bf6 (worse 7.Bg4 Ng4 8.Qg4 d6=+) 7...Bf6 8.Nc3=) 6.a4 (6.Bf6 ef6 7.Nc3 d6+=) 6...d6 (6...Bg7 7.Bf6 Bf6 8.d4=) 7.Nc3 (7.Bf6 ef6 8.d4 Rh6+=) 7...Bg7 8.Nge2 e5 9.d4 Qe7 (9...Be6 10.de5 de5 11.Qd8 Kd8 12.Rd1 Nbd7 13.Nd5=) 10.de5+= de5 11.Ba3 Qe6 12.Nc1 (12.Nd5 Qd7+=) 12...Nbd7 (12...e4=) 13.Nd3 (13.Nd5 Nd5 14.cd5 Qg6+=) 13...b6 (13...Qc4 14.Rc1 Qe6 15.e4=+) 14.Be2 (14.Rc1 Bb7=) 14...Bb7=+ 15.0–0 h4 (better 15...c5=+) 16.f3? (better 16.c5 h3 17.g3=) 16...h3 17.e4 (17.fg4!? hg2 18.Rf2–+) 17...hg2–+ 18.Kg2 g3 (18...gf3 19.Bf3 Qh3 20.Kf2 Qh2 21.Ke1 Qg3 22.Ke2 Rh2 23.Rf2 Ng4 24.Bg4 Qg4 25.Kd2 Rf2 26.Nf2 Qg5 27.Ke2 Bh6–/+) 19.hg3–/+ Qh3 20.Kf2 Qh2 21.Ke1 Qg3 22.Kd2 Qh4 (22...0–0–0 23.Rg1 Qh2 24.Nd5=+) 23.Nd5 (23.Rh1 Qg5 24.Kc2 Rh5+=) 23...Bd5 (23...0–0–0 24.Rg1 Bh6 25.Kc2 Nd5 26.cd5=+) 24.cd5 Rc8 (better 24...0–0–0=) 25.Rc1?? (better 25.Kc2 Nh5 26.Rh1+–) 25...Bh6–/+ 26.Kc2 Kd8?? (26...Bc1 27.Kc1 Rd8 28.Bb2–/+) 27.Kb3?? (better 27.Rh1 Qg5 28.Bb2+–) 27...Bc1–/+ 28.Qc1 Qh6 (28...Qh2 29.Rf2 Qg3 30.Kb2–/+) 29.Qc3 (29.Qh6 Rh6 30.Bb2 Rh2=+) 29...Qe3 (better 29...Qh2 30.Rf2 Qg3–/+) 30.Bb2?? (better 30.Re1 Qg5 31.Bb2=+) 30...Qe2–+ 31.Ne5 (31.Re1 Qd3 32.Qd3 Nc5 33.Kc2 Nd3 34.Kd3 Nd7–+) 31...Ne5 (better 31...Qf1 32.Nf7 Ke7 33.Nh8 Qd1 34.Ka2 Rh8–+) 32.Qe5 Threatening mate: Qxf6 32...Qd3 (32...Rh6 33.Ba3 Qe3 34.Qc3 Qc3 35.Kc3–+) 33.Ka2 (33.Qc3 Qc3 (33...Qf1?! 34.Qf6 Ke8 35.Qh8 Kd7 36.Qf6 Qd3 37.Ka2 Qc4 38.Kb1 Qd3 39.Kc1 Qe3 40.Kd1 Qd3 41.Ke1 Qe3 42.Kd1 Qd3 43.Kc1 Qe3 44.Kc2 Qe2 45.Kc3=) 34.Bc3 Ke7–+) 33...Rh6 (33...Qc4 34.Ka3 Rh6 35.Rc1 Qb4 36.Ka2–+) 34.Rc1 Qe3 (34...Qd2 35.Qd4 Qf4 36.Qe5 Qe5 37.Be5–+) 35.Rc6 (35.Rc2 Rg6 36.Qf5–+) 35...Nd7?? (better 35...Ne8 36.Qc3 Qc3 37.Rc3 Nd6–+) 36.Qg7+= Rc6 37.bc6 (better 37.dc6 Qc5 38.Qf7+=) 37...Ke7?? (better 37...Qc5=) 38.cd7+– Kd7?? (38...Rd8 39.Bf6 Kd7 40.Qf7 Kc8 41.Qe6 Kb8 42.Bd8 Qd2 43.Kb3 Qd3 44.Kb2 Qd2 45.Kb1 Qd1 46.Kb2 Qd2 47.Ka3 Qe3 48.Kb2 Qd2=) 39.Qf7 Kd6 40.Qe6 Kc5 41.Qc6 Kb4 42.Qb5 1–0. BeepBeepImAJeep (2745) – samidescalona2002 (2520), lichess.org, 2020.

2.c3 a4 3.Nf3 b5 4.a3 (4.e4 c6+/–) 4...Nf6 5.e4 Ne4 (5...c6 6.e5 Nd5 7.d4+=) 6.Bb5+/– c5 (6...Bb7 7.Ba4 e6 8.0–0+/–) 7.0–0 Qb6 8.Ba4 cb4 9.ab4 Ba6 10.d3 Nf6 11.Na3 Bb7 (11...Nd5 12.Qb3 Bb7 13.Nc4+–) 12.Be3 Qc7 13.Nb5 Qc8 14.Ne5 e6 (14...Nc6 15.Bf4 Ba6 16.Qf3 Bb5 17.Bb5 Ra1 18.Ra1+–) 15.Nc4 Nd5 (15...Ra6+–) 16.Nbd6 (16.Nbd6 Bd6 17.Nd6 Ke7 18.Nc8 Rc8 19.c4+–) 1–0. pierred (2760) – dennism (2255), net–chess.com, 2010.

2.c3 e6 (--> 1.b4 e6 2.c3 a5).

2.c3 g6 3.Qa4 Bg7 4.Bb2 Nf6 5.d3 0–0 6.Nd2 d5 7.h3 Nbd7 8.ba5 c5 9.Ngf3 Ra5 10.Qc2 e5 11.e3 Qe7 Black prepares e4 12.Be2 b5 13.0–0 e4 14.de4 de4 15.Ng5 Bb7 16.c4 h6 17.Nge4 Ne4 (better is 17...Be4 18.Ne4 Qe4–/+) 18.Bg7+= Kg7 19.cb5 (better is 19.Ne4 Qe4 20.Qc3 Ne5 21.Bf3+=) 19...Nb6?? (19...Rfa8 20.Rfd1 Nd2 21.Qd2–/+) 20.Nb3?? (better is 20.Ne4 Qe4 21.Qc3 f6 22.Bf3+/–) 20...Raa8 21.Rfc1 Rac8 22.Bf3 Rfe8 23.Na5 Bd5–/+ Black prepares c4 24.Nb3 c4 25.Nd4 Ng5 26.Bd5= Nd5 27.Nc6 Qc5 28.Qc4 Qc4 29.Rc4 Re4 30.Rac1 Nb6 31.Re4 Ne4+= 32.f3 Nd6 33.Kf2 Nb5 34.Ke2?? Na7!!–+ 35.Kd2 Rc6 36.Rb1 Nc4 37.Kd3 Nc8 38.a4 N8d6 39.e4 Na5 40.g4 Kf6 41.f4 Ke7 42.Rb4 f6 43.e5 fe5 44.fe5 Ndb7 45.h4 Ke6 46.Kd4 Ra6 47.Ke4 Nc5 48.Kf4 Nd3 (48...Nd3 49.Ke4 Nb4–+) 0–1. grahamtrue (2245) – mrdoop (2430), net–chess.com, 2011.

2.e4 d6 3.ba5 (3.b5 Nf6=) 3...Ra5 (3...Nf6 4.Nc3=+) 4.d4= Nf6 5.Nc3 (5.Bd3 e5=) 5...g6 (5...e6 6.Nf3=) 6.Bc4 (6.Nf3 Bg7=) 6...Bg7 7.Nf3 (7.Qd3 c6=+). perspective08 – StephenHilton (1625), internet, 2006.

2.Nf3 ab4=+ 3.a3 e6 (3...Nf6 4.Bb2=+) 4.c3 (4.e4 Nf6 5.e5 Ne4=+) 4...bc3–/+ 5.Nc3 Nf6 6.Bb2 Be7 7.d4 (7.e3 0–0–/+) 7...d6 (7...d5 8.e3–/+) 8.e3 0–0 9.Bd3 Nbd7 10.Qc2 Ra5 (10...d5 11.0–0–/+) 11.Ne4 (11.0–0 d5=+) 11...Ne4–/+ 12.Be4 Nf6 (12...f5 13.Bd3–/+) 13.Bd3 (13.Bc3 Ra6 14.Bd3 Rc6–/+) 13...Bd7 14.Bc3 (14.0–0 Ba4 15.Qc3 Ra7=+) 14...Ra8 (14...Ba4 15.Qb2 Ra7 16.0–0–/+) 15.0–0 Ba4 16.Rfc1?? (better is 16.Qb2 Bc6 17.Rfc1–/+) 16...Bc2–+ (17.Rc2 d5–+) 0–1. Lopez – Harthimmer,Arne, corr 3GMM–45, 1996.

2.a3 a4

3.Bb2 b5 4.h3 f6 (4...c6 5.Nf3=) 5.g4 (5.e4 Bb7+=) 5...g5 (5...Bb7 6.Nf3=) 6.Bg2 (6.e4 Bb7+–) 6...c6+= 7.Nc3 Bb7 (7...d5!?+=) 8.Nb5!+– cb5 (8...h5!?+–) 9.Bb7+– Ra7 10.Bg2 Nc6 (10...d5 11.e4 d4 12.e5+–) 11.e3 d5 12.c3 (12.h4 gh4 13.Qe2 Rb7+–) 12...e5 13.Qf3 (13.h4 gh4 14.e4 Nce7+–) 13...e4 (better 13...Rd7+–) 14.Qf5?? (better 14.Qe2 Qb6 15.f3 ef3 16.Nf3+–) 14...Nce7–/+ 15.Qe6 Qd7?? (better 15...Rb7 16.Bf1 Rb6 17.Bb5 Rb5–/+) 16.Qd7+– Kd7 (16...Rd7 17.f3 ef3 18.Nf3+–) 17.c4! bc4 (17...bc4 18.f3 Combination; 17...dc4 18.Be4 Deflection) 18.Ne2 (18.f3 ef3 19.Nf3 h5+–) 18...Nc6 (18...Ng6 19.f3 Nh4 20.Kf2 Ng2 21.Kg2 ef3 22.Kf3+–) 19.Nd4 (19.f3 Bb4 20.ab4 Nb4+–) 19...Nd4 (19...Ne5!? 20.Ke2 Bd6+=) 20.Bd4+– Rb7 (20...Ra8 21.f3 ef3 22.Bf3+–) 21.Ke2 (21.f3 ef3 22.Bf3 Ke6+–) 21...Be7 (21...Bd6 22.f3 ef3 23.Bf3+– (23.Kf3?! Be5=)) 22.Rab1 (22.f3!? ef3 23.Bf3+–) 22...Nh6+= 23.b5 (23.f3!? ef3 24.Bf3+–) 23...Nf7 (23...Rhb8 24.h4 Nf7 25.b6=) 24.b6 (24.f3 Nd6 (worse 24...Ba3 25.fe4 Nd6 26.ed5+–) 25.b6 h5=) 24...Nd8 (24...Kc6 25.Rhc1 Rhb8 26.Be4 de4 27.Rc4 Kd5 28.Ra4=) 25.h4 (25.f3 Ne6 (worse 25...Ba3 26.fe4 Ne6 27.Bf6+–) 26.fe4 Nd4 27.ed4 Rhb8+=) 25...Ne6 (worse 25...Ba3 26.hg5 Ke6 27.f3 ef3 28.Bf3+–) 26.hg5 Nd4 (26...Ng5 27.Rh6 Rf8 28.f3 ef3 29.Bf3 Nf3 30.Kf3=) 27.ed4 fg5 28.Rh6 (better 28.f3 ef3 29.Bf3+=) 28...Bd6?? (28...Bf8 29.Rh3 Bg7 30.f3 Bd4 31.Rh6=+) 29.Rh5?? (better 29.Rb5+–) 29...h6 (better 29...Kc6–/+) 30.f4? (better 30.f3!? ef3 31.Bf3=+) 30...Bf4 (better 30...gf4 31.Rd5 f3 32.Bf3 ef3 33.Kf3 Rf8 34.Rf5 Ba3–+) 31.Kf2? (better 31.Rb5 Ke6 32.Rh3–+) 31...Kc6 32.Ke2 Rb6 33.Rb6 Kb6 34.Kd1 Kb5 35.Kc2 (35.Rh3 Bb8–+) 35...Bd6 36.Rh1 (36.Rh3 Rf8 37.Rh6 Ba3–+) 36...Ba3 37.Rb1 (37.Bf1 Rf8 38.Be2 Rf2–+) 37...Bb4 38.d3 (38.Rf1–+) 38...ed3 39.Kc1 h5 (39...Re8 40.Bf3 Re1 41.Bd1 c3 42.Ra1 c2 43.Kb2 Rd1 44.Rc1 a3 45.Ka2 Rc1 46.Kb3 Rb1 47.Ka2 Rb2 48.Ka1 c1Q) 40.Bd5 hg4 41.Be6 (41.Bc6 Kc6 42.Rb4 g3 43.Rc4 Kd7–+) 41...Rh1 42.Kb2 Rb1 43.Kb1 d2 (43...c3 44.Bd7 Kc4 45.Ba4–+) 44.Kc2 (44.Bd7 Ka5 45.Bg4–+) 44...a3 45.Bd7 Kb6 (better 45...Ka5 46.Bg4 a2–+) 46.Bg4 a2 (46...a2 47.Kb2 c3 48.Ka2 c2–+) 0–1. corinthiano007 – afsharian (1615), lichess.org, 2019. (=1.a3 a5 2.b4 a4)

3.Bb2 b6 4.e4 g6?? (4...Bb7 5.Nc3+=) 5.d3 (better 5.Bh8 Nh6 6.e5+–) 5...Nf6+= 6.e5 Nd5? (6...Nh5 7.Be2 Nf4 8.Bf3+=) 7.e6?? (better 7.c4 Bb7 8.cd5 Bd5 9.Nc3+–) 7...de6?? (better 7...Nf6 8.ef7 Kf7+=) 8.Bh8+– f5 (8...f6 9.c4 Kf7 10.cd5 ed5 11.Nc3+–) 9.c4 (better 9.Nf3 Bh6+–) 9...Nf4 (9...Nf6 10.Qf3 Ra7 11.Nc3+–) 10.Bb2 (better 10.Qf3 Nd5+–) 10...e5 (10...Bb7 11.Nf3+–) 11.Qf3 e6 (11...c6 12.Be5 Ne6+–) 12.Qa8 Ba6 (12...Bd7 13.b5+–) 13.Be5 Nd3 14.Bd3 Qd3 15.Qb8 Kd7 16.Qc7 Ke8 17.Qh7 (better 17.b5 Bb5 18.cb5 Qb5 19.Qc8 Kf7+–) 17...Qe4 18.Ne2 Qe5 19.Qg6 Ke7 20.Qh5 (better 20.Nbc3 Qg7 21.Qh5 Bb7+–) 20...Qa1 21.0–0 Bc4 (21...Qf6 22.b5 Bb7 23.Nbc3+–) 22.Qh4 Kd6 (22...Kf7 23.Qc4 Qe5 24.Nbc3+–) 23.Qc4 Qe5 24.Rd1 Ke7 25.Nf4 (better 25.Qh4 Qf6 26.Rd7 Kd7 27.Qf6 Be7 28.Qd4 Ke8 29.Qb6 e5+–) 25...b5 26.Ng6 (26.Qc8 Kf7 27.Qf8 Kf8 28.Ng6 Kg7 29.Ne5 Kf6+–) 26...Kf6 27.Qh4 (better 27.Nf8 Qh2 28.Kh2 bc4 29.b5+–) 27...Kg6 28.Qg3 Kf6 (28...Qg3 29.fg3 Bg7 30.Rd6+–) 29.f4 (better 29.Qe5 Ke5 30.Nc3 Bg7+–) 29...Bc5 (29...Qc7 30.Qc3 Qc3 31.Nc3 Bh6+–) 30.Kh1 Ba7 31.fe5 (31.Qg5 Kf7 32.Rd7 Ke8 33.Qe7) 31...Kf7 32.Rd7 Ke8 33.Ra7 (33.Qg7 Bd4 34.Qe7) 33...Kd8 (33...Kf8 34.Qg7 Ke8 35.Qe7) 34.Qg8 1–0. SieStein – lucasfortunato, lichess.org, 2019.

2.Ba3 a4

3.e4= e5 4.d4 Nc6 5.d5 Nd4?? 6.c3+– Nb3 7.ab3 d6 8.c4 Nf6 9.Bb2 ab3 10.Ra8 Bg4 11.Rd8 Kd8 12.Be2 h5 13.Bg4 hg4 14.Qb3 Ne4 15.Nd2 Ng5 16.Qe3 Be7 17.f3 gf3 18.Ngf3 Ne4 19.Ne4 Kd7 20.c5 Bh4 21.Nh4 Rh4 22.0–0 Re4 23.Qe4 f6 24.cd6 Kd6 25.Qg6 Kd5 26.Qg7 (26…b5 27.Qd7 Kc4 28.Qc6 Kb4 29.Qc3 Ka4 30.Ra1#) 1–0. xyzzy – sirrad, ChessWorld.net, 2005.

3.Nf3 e6 4.e4 Nf6 5.d3 b5 6.Nc3 Be7 (better 6...c5!? 7.Nb5 cb4=) 7.Nb5+= 0–0 8.Be2 c6 9.Nbd4 Qb6 10.c3 d5 11.e5 Ng4 12.0–0 (12.h3!? Nh6 13.Bc1+–) 12...f6 (12...Qc7!?=) 13.ef6+– Bf6 14.b5 (14.Rb1 e5 15.Nc2 Nd7+–) 14...c5+= 15.Rb1 Qd6 (15...Rf7!? 16.Nc2 Bc3+=) 16.b6 Bd4 17.cd4 Rf3 Threatening mate... how? 18.g3 (18.Bf3 Qh2 A classical mating theme) 18...Rf6? (better 18...Nf2!? 19.Rf2 Rf2 20.Kf2 e5+–) 19.Bc5 Qc6 20.Rc1 (20.Bg4 Qb7+–) 20...Qe8? (better 20...Nh2 21.Be7 A) 21...Qb6?? 22.Rc8 (22.Kh2?! Rh6 23.Bh5 Ba6+–; 22.Bf6?! Bd7 23.Kh2 gf6+–) 22...Kf7 A1) 23.Kh2?! Ke7 24.Qc1 Ra7= (24...Qd4?? 25.Qc7 Nd7 26.Ra8 Rf2 27.Kh3 Rf1 28.Qd8 Kd6 29.Ra6 Ke5 30.Bf1+–); A2) 23.Bf6 Kf6 24.Kh2 Qa6+–; A3) 23.Bc5+–; B) 21...Qe8 22.Kh2 Rf7+–) 21.Bg4+– Nd7 22.Re1 Qf7 23.Re2 (23.Qe2 Nc5 24.dc5 e5+–) 23...Ba6 24.Rb2 Bb7 (24...Re8 25.Bd6 a3 26.Ba3+–) 25.Bd6 Ra6 (25...a3 26.Rbc2 Rd8+–) 26.Bc5 (26.Rc7 a3 27.Rb3 Qe8 28.Rb7 Rf7+–) 26...Bc6?? (26...Ra8 27.Ba3 Qe8+–) 27.b7 Bb7 (27...Qe8+–) 28.Rb7 Ra8 (28...Qe8 29.Rcb1 h6 30.Bh5+–) 29.Qe2 (29.Bb4 h5 30.Bh3 Rf2 31.Rd7 Qd7 32.Kf2 h4+–) 29...Kh8 (29...Rc8 30.Qb2 Qe8 31.Qb5+–) 30.Rcb1 (30.Bd6 Qe8 31.Rcc7 Rd8+–) 30...Rd8 (30...Qe8 31.Bd6+–) 31.a3 (31.R1b6!? Qe8 32.Re6 Re6 33.Be6 Nf8 34.Bf8 Qf8+–) 31...Qe8 32.Bd6 Nf8 (32...Rc8 33.Qb2+–) 33.Be5 (better 33.Be7 Rc8 34.Bf6 gf6+–) 33...Nd7 (33...Rf7 34.Bh5 Ng6 35.Rb8+–) 34.Bf6 gf6 (34...Nf6 35.Qe6 Qe6 36.Be6+–) 35.Qe6 Qe6 36.Be6 Nf8 37.Bf5 Ng6 38.R1b4 Ra8 39.Rb8 Rb8 40.Rb8 Kg7 41.Bg6 (41.Rb7!? Kh8+–) 41...hg6 42.Ra8 g5 43.Ra4 Kf7 44.Rb4 (44.Rb4 f5 45.a4+–) 1–0. workchess – bgnagy, net–chess.com, 2020.

2.Ba3 e6

3.ba5 Ba3 4.Na3 Ra5 (4...d5 5.Nb5=+) 5.Nc4= Ra8 6.e3 d5 7.Ne5 f6?? (7...Qd6 8.f4=) 8.Nef3?? (better 8.Qh5 Ke7 9.Ng6 hg6 10.Qh8+–) 8...e5 9.d4 e4 10.Nd2 Ne7 11.Bb5 (11.c4 c6=) 11...c6=+ 12.Be2 Ng6 (12...b5 13.c3=+) 13.c4= Bf5 14.cd5 cd5 15.Bb5 Nc6 16.Qc2 Rc8 17.a4 (17.Ne2 0–0 18.Qb3 Qd6=) 17...0–0=+ 18.Ne2? (better 18.Qb2=+) 18...Nd4! 19.Qa2? (19.Nd4 Rc2 Discovered attack; 19.ed4 Rc2 Discovered attack) 19...Nc2 20.Kd1 Na1 21.Qa1 Ne5 22.Nf4 (22.Rf1 Bd7–+) 22...Rc5 (22...Qc7!? 23.h3–+) 23.Nb3 Rb5! 24.ab5 Qb6 25.Nd4 Bg4 26.Ke1 (better 26.Kd2 Nc4 27.Ke1–+) 26...Nd3 (better 26...Rc8 27.h3 Bd7–+) 27.Kf1? (27.Nd3 ed3 28.Kd2 Be2=+) 27...Rc8?? (better 27...Nf4 28.h3 Bd7 29.ef4 Rc8–+) 28.Qa3?? (better 28.Nd3 ed3 29.f3–/+) 28...Rc1 (28...Qa7 29.g3 Nf4 30.gf4 Bf3 31.Rg1 Qa3 32.Rg7 Kg7 33.Nc2 Rc2 34.f5 Qc1) 29.Qc1 Nc1 30.h3 (30.f3 ef3 31.Kf2–+) 30...Be2! 31.Kg1 (31.Nde2 Ne2 Combination; 31.Nfe2 Nd3 Combination) 31...Bb5 (31...Bc4 32.Kh2 Nb3 33.Nb3 Bb3 34.Ne2–+) 32.Kh2 Qc7 (better 32...Nd3–+) 33.Nb5 Qb8 (better 33...Qc4 34.Nd6 Qc6–+) 34.Rc1 g5 35.Nd6?? (better 35.g3 gf4 36.gf4–+) 35...gf4 (better 35...Qd6 36.Rc8 Kf7–+) 36.Rc8+– Qc8 37.Nc8 fe3 38.fe3 Kf7 39.Nd6 Ke6 40.Nb7 Ke5 41.Kg3 (41.Na5 Ke6+–) 41...f5 (better 41...d4 42.ed4 Kd4+–) 42.Na5 d4 (42...f4 43.ef4 Kd6 44.Nb7 Ke6 45.Nc5 Kf5 46.Nb3+–) 43.ed4 (better 43.Nc6 Ke6 44.Nd4 Ke5 45.Nc6 Kd5 46.Kf4+–) 43...Kd4 44.Nb3 (44.Kf4 e3 45.Nb3 Kd3 46.Kf5 Ke2+–) 44...Kd3 (44...Ke3!?+–) 45.Nc5 Kd2 46.Kf4 e3 47.Nb3 (47.Kf5?? e2 48.Ne6 e1Q–+) 47...Ke2 48.Nd4 Kf2? (48...Kd3 49.Nc6+– (49.Nf5 e2–+)) 49.Kf5 (49.Nf5?? e2–+) 49...Kg2 50.Nc2?? (better 50.h4 Kg3 51.Kg5+–) 50...e2 51.h4 Kg3 (51...Kh3 52.Kg5 h6 53.Kh5+=) 52.h5 (better 52.Kg5!? h6 53.Kh5+–) 52...Kh4= 53.h6 Kh5 54.Kf6 (54.Ke4 Kh6 55.Ke3 Kg5=) 54...Kh6 55.Kf5 Kh5 56.Kf4 Kh4 57.Kf3 h5 58.Ke2 Kh3 59.Kf2 h4 60.Ne3 Kh2 61.Kf1 h3?? (61...Kg3 62.Nf5 Kf3 63.Nh4=) 62.Nd1 (62.Kf2 Kh1 63.Nf1 h2 64.Ng3) 62...Kg3= 63.Ne3?? (better 63.Nf2=) 63...h2–+ 64.Nf5 Kh3 65.Ne3 h1Q 66.Ke2 Qa8 67.Kf2 Kh4 0–1. Agiant – Davidbcn1975, lichess.org, 2020.

3.c3 b6 (3...ab4 4.Bb4 (4.cb4? Qf6 5.Nc3 Ra3–+) 4...c5 5.Ba3+=) 4.e4 (4.b5!?=) 4...Bb7–/+ 5.Nf3 (5.Qc2 ab4 6.Bb4 Bb4 7.cb4 Nc6+=) 5...Be4 (better is 5...ab4 6.Bb2 Nf6–/+) 6.Bb5 (6.b5!?–/+) 6...Nf6 (6...Qf6 7.Qe2 Bf3 8.Qf3 Qf3 9.gf3 ab4 10.Bb4 Bb4 11.cb4–+) 7.d3 (7.0–0 Bb1 8.Qb1 ab4–+) 7...Bb7 (7...Bf3 8.Qf3 c6 9.d4–+) 8.0–0 Be7 (8...ab4 9.Bb4 Bb4 10.cb4–+) 9.d4 (9.Re1 0–0–+) 9…0–0 (9...0–0 10.Be2 Nd5–+) 0–1. Ritter – Wartig,Wolfgang, corr SOK–90–61, 1990.

3.c3 b6 4.Nf3 Nf6 (4...ab4 5.Bb4 Bb4 6.cb4=+) 5.g3 (5.b5!?=) 5...ab4–/+ 6.Bb4 Bb4 7.cb4 Bb7 8.Bg2 0–0 9.a3 Ng4 (9...Nc6!?–/+) 10.0–0= Nh6 11.d3 Qf6 12.Nbd2 d5 13.b5 d4 (13...c5 14.bc6 Nc6 15.Rb1=+) 14.Ne4 Qe7 (14...Be4!? 15.de4 e5=) 15.Nd4+– Be4 16.Be4 Ra7 (16...Ra3 17.Qc2 Ra1 18.Ra1+–) 17.h3 (17.Qc2 Rd8 18.Qc4 Qf6+–) 17...e5 (17...Qc5 18.e3 e5 19.Rc1+–) 18.Nc2 (18.Nf3 Rd8+–) 18...f5 (better 18...Qd7!?+=) 19.Bd5+– Kh8 20.Nb4 f4 21.g4 Qh4 22.Bg2 Rd8? (22...Nf7 23.Qb3 Ng5 24.Qd5 Nh3 25.Bh3 Qh3 26.Qg2= (26.Qe5? Qg4 27.Kh2 Nd7–+)) 23.e4 (better 23.Qb3!?+–) 23...Rf8 (23...Nf7 24.Qd2=) 24.f3+= Nf7 25.Qe1 Qf6 26.Nd5 Qd6 27.Qc3 Attacking the backward pawn on c7 27...Rg8 (27...Nd7 28.Rfd1+=) 28.Rfc1 Rc8 29.a4 White fights for the Initiative 29...Nd7 30.Kh2 (30.a5 Nd8+–) 30...Nf6+= 31.Nb4 h5 (better 31...Nd8!?+=) 32.Nc6+– White intends a5 32...Rb7 33.g5 Nd7 34.h4 Nc5? (better 34...Nb8+–) 35.a5 ba5 (35...Ra8 36.a6 Rba7 37.Rd1+–) 36.Qc5 Qd3 (36...a4 37.Qd6 Nd6 38.Ne5+–) 37.Rd1 (37.Qe7 Nd6 38.Ne5 Qb5 39.Qd6 a4+– (39...cd6?? 40.Rc8 Qe8 41.Re8 Kh7 42.g6 Kh6 43.Rh8)) 37...Qe2 (37...Qb5 38.Ra5 Qb3+–) 38.Qe7 Qc4 (38...Qf2 39.Qf7 Qh4 40.Kg1 Qg5 41.Rd5+–) 39.g6 (39.Na5 Qb5 40.Qf7 Rb6 41.Qh5 Kg8+–) 39...Nd6 (39...Nh6 40.Rd8 Rd8 41.Qd8 Ng8 42.Ne5 Qe6 43.Nf7 Qf7 44.gf7 Kh7 45.fg8Q Kh6 46.Qg5) 40.Rd6! cd6 A pinning theme. 41.Qb7 Rf8 (41...Qg8 42.Qe7 Re8 43.Qg5 Qe6 44.Qh5 Kg8 45.Ra5 Rc8 46.Ne7 Kf8 47.Qh8 Ke7 48.Ra7 Rc7 49.Rc7 Qd7 50.Qg7 Ke8 51.Qd7 Kf8 52.Qc8) 42.Ra5 (42.Ra5 Qe6 43.Ra8 Qg6 44.Rf8 Kh7 45.Kg1+–) 1–0. ctrotter – bgnagy, net–chess.com, 2020.

2.ba5 c6

3.Bb2 (--> 1.b4 c6 2.Bb2 a5 3.ba5).

3.Nc3 d5 4.Nf3 Bg4 (4...d4 5.Ne4=) 5.Rb1 Qc7 6.e4 de4 (6...d4 7.Ne2 e5 8.Ng3=) 7.Ne4 Ra5 8.Qe2 Ra2 (8...e6!?=) 9.Rb7+= Qd8 (9...Qb7 10.Nd6 Double attack (10.Nd6 Decoy)) 10.Bb2 Bf3 (better is 10...e6+=) 11.Qf3+– (worse is 11.gf3 Ra8+/–) 11...Nf6?? (11...Ra8+–) 12.Bf6 (better is 12.Nf6 gf6 13.Rb8 Qb8 14.Qc6 Kd8 15.Qd5 Qd6 16.Qa2 Bh6 17.Qa8 Kc7 18.Qa7 Kd8+–) 12...gf6 (12...Rc2 13.Qd1 Qc8+–) 13.Bc4 Ra1 14.Ke2 Rh1 (14...Bg7 15.Ra1 0–0+–) 15.Nf6! ef6 (15...ef6 16.Bf7 Mate attack) 16.Bf7# 1–0. usingprogram – dlugibolek, internet, 2011.

3.e3 Qa5 4.Bb2 (--> 1.b4 c6 2.Bb2 a5 3.ba5 Qa5 4.e3).

3.Nf3 Qa5 4.Bb2 (--> 1.b4 c6 2.Bb2 a5 3.ba5 Qa5 4.Nf3).

2.b5 c6

3.a4 b6 (--> 2.b5 b6 3.a4 c6).

3.a4 Nf6 4.Bb2 e6 5.d4 Be7 6.c4 (6.e3 0–0= (6...d5 7.Ba3 Ba3 8.Ra3 0–0 9.Nf3 Nbd7 10.Bd3 c5 11.0–0 c4=; 6...b6 7.Bd3 d5 8.Nf3 0–0 9.0–0 Ne4 10.c4 Bb7 11.Nbd2 Nd2=; 6...Bb4 7.c3 Be7 8.Nf3 0–0 9.Bd3 cb5 10.ab5 b6 11.0–0 d5+=) 7.Nf3 d5 8.Ba3 Nbd7 9.Be2 cb5 10.Bb5 Nb6 11.Be7 Qe7=; 6.Nf3 cb5 7.ab5 0–0 8.c4 b6 9.e3 Bb7 10.Ra4 Ne4 11.Ba3 Ba3=; 6.Ba3 0–0 (6...d6 7.Qd3 cb5 8.ab5 Qc7 9.e4 b6 10.c4 Bb7 11.Nc3 Nbd7=; 6...cb5 7.ab5 d6 8.Qd3 Nbd7 9.e4 0–0 10.Nf3 b6 11.Nbd2 Bb7=) 7.Be7 Qe7 8.e3 d6 9.Nf3 e5 10.Be2 Bg4 11.0–0 Rc8=) 6...0–0 (6...b6 7.e3 0–0 8.Nf3 d5 9.Ba3 c5 10.dc5 bc5 11.Nc3 Bb7=; 6...d5 7.e3 0–0 8.Ba3 cb5 9.ab5 b6 10.Nf3 dc4 11.Bc4 Bb7=) 7.Nf3 (7.e3 b6 8.Nf3 d5 9.Ba3 c5 10.dc5 bc5 11.Nc3 Bb7=) 7...d5 8.c5 (8.e3 b6= 9.Ba3 c5 10.dc5 bc5 11.Nc3 Bb7=) 8...b6+= (8...Ne4 9.Nfd2 f5 10.e3 e5 11.Be2 ed4=) 9.cb6 (9.Qc2 bc5 10.dc5 Ne4 11.Bd4 cb5–/+) 9...cb5 (9...Qb6 10.e3+= (10.Ba3 Bb4 11.Bb4 ab4+=) 10...Bb4 11.Bc3 Bd6+=) 10.b7 (10.ab5 Nbd7= 11.Ba3 Nb6+=) 10...Bb7+= 11.ab5 Bb4 (11...Qb6+=) 12.Bc3 Qe7 13.Qb3 Bc3 (13...Rc8 14.Bb4 ab4 15.Ra8 Ba8 16.Qd1+=) 14.Nc3= Nbd7 15.e3 Qb4 (15...Ne4 16.Bd3=) 16.Nd2 (16.Rb1 Qd6=) 16...Rfc8 17.Na2 (17.Na4 Ne4 18.Qa2 Nd2 19.Qd2 Rc2 20.Qb4 ab4–+) 17...Qb3 18.Nb3 a4 19.Nd2 Rc2 (19...e5 20.de5 Ne5 21.Be2+=) 20.Nb4 (20.Bd3 Rb2 21.Ke2 e5=) 20...Rb2+= 21.Rb1 (21.Na6 Rc8+=) 21…a3 (21...a3 22.Rb2 ab2=). Langschmidt,Dirk (2100) – Gottwald,Bernhard (1925), RSS7E basic–22, 2010.

2.b5 e6

(--> 1.b4 e6 2.b5 a5).

3.a3 d5 4.Bb2 Nf6 5.e3 Nbd7 6.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 a5 6.b5).

3.Bb2 d5 4.e3 Nf6 5.Nf3 c5 (without 6.bc6) (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 a5).

3.Bb2 Nf6 4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 a5 4.b5).

3.Bb2 Nf6 4.a4 d5 5.e3 c6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 a5).

3.Bb2 Nf6 4.e3 d5 5.Nf3 (--> 1.b4 a5 2.b5 Nf6 3.Nf3 e6 4.Bb2 d5 5.e3).

3.Nf3 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Nf3 e6).

2.c3 d5

3.a3 ab4 4.cb4 e5 5.Bb2 Bd6 6.d3 f6 7.e3 Be6 8.g3 Nd7 9.Bg2 Ne7 10.Nf3 c6 11.0–0 0–0 12.Nbd2 Bg4 13.Qb3 Kh8 14.Rac1 f5 15.Ba1 e4 16.de4 fe4 17.Nd4 Rf7 18.h3 Bh5 19.Ne6 Qe8 20.Ng5 Rf8 21.Ne6 Rg8 22.a4 Ne5 23.b5 Nd3 24.Rb1 Bf7 25.Nd4 c5 26.Nf5 Nf5 27.Rbd1 d4 28.ed4 Bb3 29.Be4 Bd1 30.Rd1 Nd4 31.Bd3 Rf8 32.Ne4 Qe6 33.Ng5 Qf6 34.Ne4 Qe5 35.Kg2 Rae8 36.Rf1 Qd5 37.Kg1 Re4 38.Be4 Qe4 39.h4 Nf3 40.Kg2 Qg4 41.Rc1 Nd4 42.Bd4 cd4 43.Rc4 Qf3 44.Kg1 Qf2 45.Kh1 Qg3 46.Rd4 Rf1 0–1. mzs78 – gambitiste (1605), kurnik, 2012. (=1.c3 d5 2.b4 a5)

3.Qa4 Bd7 4.b5 Na6 5.e3 Nc5 6.Qd4 e6 7.Ba3 b6 8.Bc5 bc5 9.Qe5 Nf6 10.a4 Bd6 11.Qg5 0–0 12.Bd3 c4 13.Bc2 h6 14.Qh4 c6 15.bc6 Bc6 16.f3 Nd7 17.Ne2?? Qh4 (18.g3 Qh3–+) 0–1. audrey – melagxoli, Live Game Caissa's Web, 2004.

3.Nf3 ab4 4.cb4 e5 (better is 4...Nf6+=) 5.g3? (better is 5.Ne5 Bb4 6.Qb3+=) 5...e4–+ (5...Bb4?! 6.Ne5 Nf6 7.Bg2+=) 6.Ne5? (better is 6.Nd4 Bb4 7.Bb2–+) 6…f6 (6...Bb4?! 7.h3–+) 0–1. Colin – Wall,Bill, internet, 2000.

2.c3 e5

3.Bb2 ab4 4.cb4 Bb4 5.Be5 (--> 2.c3 ab4 3.cb4 e5 4.Bb2 Bb4 5.Be5).

3.Bb2 f6 4.a3 (--> 1.b4 e5 2.Bb2 f6 3.a3 a5 4.c3).

2.a3 ab4=+

3.a4 c5 4.Bb2 f6 5.e3 e5 6.Nf3 d5 7.c3 (7.d4 e4 8.Bb5 Nc6–/+) 7...bc3 8.Nc3 b6 (8...c4!?–/+) 9.Bb5=+ Kf7 10.0–0 d4 (10...Ne7 11.d4 cd4 12.ed4=+) 11.Ne4 (11.Bc4 Ke8 12.ed4 cd4 13.Ne5 fe5 14.Qh5 Kd7 15.Qf5 Kc7 16.Qe5 Kb7 17.Bd5 Nc6 18.Bc6 Kc6 19.Qe4 Kd7 20.Qd4 (20.Qa8?! dc3 21.Qd5 Bd6 22.Bc3 Ke8 23.Rfe1 Ne7+–) 20...Ke8 21.Qe4 Ne7 22.Qa8 Qd2 23.Rab1+–) 11...Bd7 (11...Bb7 12.Ne5 Ke7 13.Qh5+–) 12.Qb3 (12.Bc4 Ke7+=) 12...Kg6 13.h4 (13.Neg5 Nh6 14.Qd5+–) 13...h5?? (13...Bg4 14.Neg5 Nh6 15.ed4+=) 14.Bc4 (better 14.Neg5 Qe8 15.Nf7+–) 14...Qe7?? Attacking the isolated pawn on a4 (better 14...Nh6=) 15.Bg8+– Rg8 (15...Ba4 16.Ra4 Ra4 17.Qa4 Rg8 18.Qb3+–) 16.Qg8 Be6 (16...Ra4 17.Ra4 Ba4 18.ed4 cd4 19.Nf6 Kf6 20.Ng5+–) 17.Qh8 Nc6 (17...Qd8 18.Ng3 Kf7 19.Qh5 Kg8 20.Rfb1+–) 18.ed4 (18.Ng3 Kf7+–) 18...Nd4 (18...Qa7 19.Ng3 Bg4+–) 19.Nh2 (better 19.Nd4 cd4 20.Ng3+–) 19...Ne2+– 20.Kh1 Nf4?? (better 20...Qb7 21.Rfe1 Qe4–+) 21.g3 (21.Ra3 Qd8+–) 21...Nh3? (better 21...Nd3 22.g4! hg4+–) 22.Kg2?? (22.f3 Qb7 23.g4 Bg4+–) 22...Qf7?? (better 22...Qb7 23.g4 Qe4 24.f3 Nf4 25.Kh1 Qe2–+) 23.g4 (23.f4!? Qb7 24.f5 Bf5 25.Rf5 Qe4 26.Rf3 Bd6 27.Qa8 Qa8 28.Kh3 c4+=) 23...Be7?? (better 23...Nf4 24.Kg1 hg4+–) 24.Qh5 1–0. alddhsfd (1815) – jonderboi (1820), lichess.org, 2019.

3.a4 d6 4.Bb2 Qd7 5.c3 Qe6 (5...Nc6 6.cb4 Nb4 7.e4–/+) 6.e3 (6.cb4 Nc6 7.Bc3 Nf6=+) 6...Na6 7.Nf3 Qg4 8.h3 Qh5 9.g4? (better is 9.Ba6 Ra6 10.cb4=) 9...Bg4!–+ 10.hg4? (better is 10.Bg2 Bf5 11.Nd4 Qd1 12.Kd1–+) 10...Qh1 11.Ke2 (11.Qe2 c6–+) 11...c5 12.Ng5 h5 13.Ne4 hg4 14.Ng3 Qg1 15.Qb3 Rd8 16.Nf5 d5 17.cb4 Rh1 18.Ng3 Rh2 19.Qd5 Rd5 20.Nc3 Qf2 21.Kd1 Rd2 22.Kc1 Qe1 23.Nd1 Qd1 (23...Rd1?!=) 0–1. Tiedemann,Marcel – Rettkowski,Marcel, RSM2002 remoteschach.de, 2002.

3.Bb2 Ra4 4.e3 (4.c4 Ra6=) 4...ba3=+ 5.Na3 (5.Ba3 c5=+) 5...Rb4 (5...Nf6 6.Nf3=+) 6.Bc3= Ra4 7.Nf3 (7.Bb2=) 7...c6 (7...Ra8 8.Nb5 Ra1 9.Qa1=) 8.Ne5 (better 8.Nc4 Ra6 9.Qb1+=) 8...d6–/+ 9.Nec4 (9.Nd3 e5–/+) 9...Nf6 (better 9...e5–/+) 10.Rb1? (10.Nb2 Ra8–/+) 10...b5 (10...d5 11.Ba5 Ra5 12.Na5 Qa5 13.Ra1–+) 11.Qc1? (11.Nb5 cb5 12.Nb6 Ra2 (12...Qb6?! 13.Bb5 Bd7 14.Ba4=) 13.Bb5 Nbd7–/+) 11...bc4 (better 11...Be6!? 12.Na5 Ra5 13.Ba5 Qa5–+) 12.Rb8–/+ Qc7 (12...d5 13.Nb1–+) 13.Rb1 (13.Qb2 Nd7 14.Rb4 Rb4 15.Bb4 d5–/+) 13...d5 14.Be2 (14.Bb4 Qa7–/+) 14...e6 (14...e5 15.Ra1–+) 15.Ra1 Be7 (15...Qa7 16.Bb2–/+) 16.0–0–/+ 0–0 17.Bb2 (17.Qb2 Bd6 18.Nb1 Ra1 19.Qa1 e5–/+) 17...Ne4 (17...Ba6 18.Nb1 Ra1 19.Ba1–+) 18.f3 Nf6 19.d3 (19.f4 Qa5–/+) 19...Bd6 (19...Bc5 20.f4–+) 20.f4 (20.h3 Nh5 21.Rd1 Bh2 22.Kf1 Ng3 23.Kf2 Qe7 24.dc4 Qh4–+ (24...Ne2?! 25.Ke2 Ba6 26.Kf1–+)) 20...Bc5 (20...Qa7 21.dc4 Bc5 22.Bd4 Bd4 23.ed4 Qd4 24.Kh1–+) 21.dc4 (21.Bf6 gf6 22.d4 Bd6–/+) 21...Ne4 (better 21...Qb6!? 22.Bd4 Bd4 23.ed4 Qd4 24.Kh1 Ba6–+) 22.Bd4–/+ Bd4 (22...Bd6 23.cd5 ed5 24.c4–/+) 23.ed4=+ Qa7 (23...Ba6 24.c3–/+) 24.c3= Bd7 (24...Ba6 25.Bd3=+) 25.Bd3 (25.Bd1 Ra5 26.Bf3 Nf6=) 25...Ra8 26.Be4 de4 27.Nc2 c5 28.g3 (28.Qd2 Qc7=+) 28...cd4 (28...Qb6 29.Qb1 Qd8 30.Ra4 Ba4 31.dc5 Bc2 32.Qc2=+) 29.cd4 Ra2 (29...Qb6 30.c5 Qb3 31.Rb1=) 30.Ra2 Qa2 31.Ne3 (31.Qa1 Qa4=) 31...Qa7 (31...Qb3 32.Re1=) 32.Rd1 (32.Qb2 Rb8 33.Ra1 Qc7=) 32...Qa2 (32...Ba4 33.Rd2=) 33.Rd2 Qb3 34.Kf2 (34.Rb2 Qd3 35.Qd2 Qa3=) 34...Ra3 (34...Qb4!?=) 35.Rb2+= Qa4?? (better 35...Ra2 36.Ra2 Qa2 37.Qc2 Qa8+=) 36.Rb8+– Be8 37.Qc2 (better 37.Re8 Qe8 38.Qa3+–) 37...Qc2+– 38.Nc2 Kf8?? (better 38...Rf3 39.Ke2 Kf8+–) 39.Na3+– e3 (39...f5 40.d5 ed5 41.cd5+–) 40.Ke2 (40.Ke3 Ke7+–) 40...g6 (40...f6 41.Nb5 Ke7 42.Rb7 Bd7 43.c5+–) 41.Ke3 Ke7 42.d5 (better 42.Rb7!? Bd7+–) 42...Bd7 43.c5 (43.Rb7 ed5 44.cd5 f6+–) 43...ed5 44.Nc2 Bc6 (44...Be6 45.Rb7 Kd8 46.Nd4+–) 45.Nd4 Bd7 46.Rb6 White prepares c6 (46.c6 Be8 47.c7 Bd7+–) 46...g5 (46...h6 47.Rd6+–) 47.c6 gf4 48.Kf4 Bg4 (48...Be6 49.Ke5 f6 50.Kf4+–) 49.Nf5 (better 49.Kg4 Kd6 50.Rb7+–) 49...Kf8 (49...Bf5 50.Kf5 Kd6+–) 50.Rb8 1–0. TwelveTeen (2640) – Arstan23 (2580), lichess.org, 2018.

3.Bb2 c5 4.e3 d5 5.ab4 Ra1 6.Ba1 cb4 7.Nf3 Qa5 8.Bb2 Nc6 9.d3 (9.Nd4 Qa2 10.Qc1 Bd7=+) 9...Nf6 10.Nbd2 (10.Bf6 ef6 11.d4 Bd6=+) 10...e6 (10...Qc7 11.Qa1=+) 11.Nb3 (11.Bf6 gf6 12.d4 Bd6=+) 11...Qa2 (11...Qd8 12.Be2=+) 12.Bf6 gf6 13.Be2 Rg8 (13...Qb2 14.0–0=+) 14.0–0 Qa8 (14...e5 15.d4=+) 15.Qd2 (15.d4 h6=) 15...b6 (15...e5 16.Ra1 Qb8 17.Nh4=+) 16.Ra1 Qb8 17.Nbd4 (17.e4 de4 18.de4 Bd7=) 17...Nd4=+ 18.Nd4 Bb7 (18...Bd6 19.Nf3 Qc7=) 19.c3 (19.Nb5!?=) 19...bc3 (19...e5 20.Nf3 Qc8 21.cb4=+) 20.Qc3=+ Bd6 21.Bd1 (better 21.g3!?=+) 21...Bh2–/+ 22.Kf1 Be5 23.Ba4 (23.Qb4 Qc7–/+) 23...Kf8 (23...Ke7 24.Rb1 Qd6 25.f4 Bd4 26.Qd4=+) 24.Qb4 (24.f4 Qc7 25.Qc7 Bc7 26.Bd1–/+) 24...Bd6 (better 24...Qd6!? 25.Qd6 Bd6–/+) 25.Qb6=+ Bc8 (25...Kg7 26.Nb5 Be7 27.Nd4=+) 26.Qb8 Bb8 27.Rc1 (27.Bc6 Ke7=+) 27...Ba6 28.Nc6? (better 28.Bb5 Bb5 29.Nb5=+) 28...Bd3–+ 29.Kg1 Be5 (29...Bd6 30.Nd4–+) 30.Ne5 (30.Bc2 Bc2 31.Rc2 h5–+) 30...fe5 31.Rc3 Be4 32.f3 Bf3?? (better 32...Bg6–+) 33.Rc8=+ Kg7 34.Rg8 Kg8 35.gf3 Kg7 36.Kf2 f5 Black prepares the advance e4 37.Bd7 (37.Kg3 Kf6 38.Bb3 Kg5–/+) 37...Kf6 38.Ke2 (38.Kg3 e4–+) 38...h6 (38...e4 39.fe4 de4 40.Kf2–+) 39.Kf2 (39.Bc6 h5–+) 39...e4–+ 40.f4 e5 41.Bc6 d4 (41...ef4 42.ef4 d4–/+) 42.Ke2 (42.ed4 ed4 43.Bd7 h5–/+) 42...h5 (better 42...d3 43.Kf2 Ke6–+) 43.Be8?? (43.ed4 ed4 44.Bb5 h4–+) 43...h4 (43...de3 44.Ke3 h4 45.Bb5–+) 44.fe5? (44.ed4 ed4 45.Kf2–+) 44...Ke5 45.ed4 Kd4 46.Kf2 (46.Bd7 h3 47.Kf2 e3 48.Ke2 h2–+) 46...f4 (46...Kd3 47.Ke1 h3 48.Bb5 Ke3 49.Bf1–+) 47.Bg6 (47.Bd7–+) 47...f3 (better 47...h3 48.Bh5 h2–+) 48.Bf5?? (better 48.Bh5=+) 48...Ke5–+ 49.Bg4 Kf4 50.Bh3 e3 51.Ke1 f2 (better 51...Kg3 52.Be6 h3 53.Bh3 Kh3–+) 52.Kf1?? (better 52.Ke2=) 52...Kg3–+ 53.Ke2 (53.Bf5–+) 53…Kh3 (53...Kh3 54.Kd3 Kg3 55.Ke3 h3 56.Kd3 f1Q 57.Kc3 h2 58.Kb3 h1Q 59.Kb4 Qc6 60.Ka3 Qc3 61.Ka4 Qfc4) 0–1. TwelveTeen (2685) – Pizza_in_winter (2660), time forfeit, lichess.org, 2018.

3.c3 ba3 4.Ba3 Nf6?? (4...d6 5.d4–/+) 5.e3?? (5.Be7 Ra1 6.Bd8 Kd8+–) 5...e6 (better 5...d6–/+) 6.Bf8?? (better 6.Be7 Ra1 7.Bd8 Kd8 8.Nf3+=) 6...Rf8?? (better 6...Ra1 7.Bg7 Rg8 8.Bf6 Qf6–+) 7.Nf3 (better 7.Ra8 Nc6 8.Bb5+–) 7...Ra1–+ 8.Nd4 Ne4 9.Bd3 Nc5 10.Qc2 (10.Be2 d5–+) 10...c6 11.0–0 e5 12.Nf5 Rg8 (better 12...Qf6 13.Be2–+) 13.Nd6 Ke7 14.Nf5 (14.Nc8 Qc8 15.Bh7 Rh8–+) 14...Kf8 (14...Ke6 15.f4 ef4 16.Nd4 Ke7 17.Nf5 Kf8 18.Nd6–+) 15.Nd6 Qe7 (better 15...g6–+) 16.Nc8 Qe6 (16...Qd8 17.Bh7 Rh8 18.d4–+) 17.Bf5 (17.Qb2 Ra8 18.Bh7 Rh8–+) 17...Qf6 (17...Ra2!? 18.Be6 Rc2 19.Bf5–+) 18.Bh7 Rh8 19.d4 Na4 20.Nd2 Rf1 21.Kf1 (better 21.Nf1 b5 22.Bd3–+) 21...g6?? (21...b5 22.Bd3 ed4 23.cd4 Rh2 24.Ne4 Rh1 25.Ke2–+) 22.Ne4? (better 22.Qa4 ed4 23.cd4=+) 22...Qh4–+ 23.Ncd6 (23.Bg6 fg6 24.Ned6 ed4 25.Qg6+–) 23...Qh2?? (better 23...b5 24.de5 Qh2–+) 24.Nf6?? (24.Qa4!? Qh7 25.Qa5=+) 24...Kg7 (24...ed4 25.Nde4 Nc3 26.Nc3 dc3 27.Qc3–+) 25.Qa4?? (better 25.Nde8 Re8 26.Ne8 Kf8 27.Qa4 Ke8 28.Qa8 ed4 29.g3 Qh1 30.Ke2 Qh5 31.Ke1 dc3 32.Qb8 Ke7 33.Qf4–+) 25...Qh1 (better 25...Kf6 26.Bg6 fg6 27.Ne4 Kf5 28.Nd6 Ke6 29.Nb7–+) 26.Ke2 Kf6 27.Ne4?! (27.de5 Kg7 28.Bg6 fg6 29.Qf4–/+) 27...Kg7 28.Ng5 (28.Bg6 Kg6 29.Ng3 Qb1 30.de5 Qb5 31.Qb5 cb5–+) 28...f6 (better 28...Qh5 29.Nf3 e4 30.Bg6 ef3 31.gf3 Qg6 32.d5–+) 29.Ne4 Rh7 (29...Qh7 30.Qb4 Qh5 31.Kd2–+) 30.Qb4 Rh2 (better 30...c5 31.Qc5 Nc6–+ (31...Qg2?! 32.Qe7 Kh6 33.Qf8 Rg7 34.Qh8 Rh7 35.Qf8 Rg7 36.Qh8 Rh7 37.Qf8=)) 31.Qe7 Kh6 32.Qf8 Kh7 (32...Kh5 33.Qh8 Kg4 34.f3 Kf5 35.Qf6) 33.Nf6 1–0. MARYMARY – jobo29, ChessWorld.net, 2012.

3.e3 ba3 (3...e5 4.Bb2 Nc6 5.Bb5–/+) 4.Ra3 (4.Ba3 d6=+) 4...Ra3 5.Ba3 d6 6.d4 Nf6 7.Bd3 e6 (7...Nc6 8.Nf3–/+) 8.Ne2 Be7 9.0–0 0–0 10.c4 b6 11.Nbc3 c6 (11...Bb7 12.e4=+) 12.Qc2 h6 13.Ra1 Na6 (13...Qc7 14.e4=+) 14.Bb2 (14.Rb1 Qc7=) 14...Bb7 (better 14...Nb4 15.Qd2 Nd3 16.Qd3 d5=+) 15.c5? (better 15.Qb3=+) 15...bc5?? (better 15...Nb4 16.Qb1 dc5–+) 16.Ba6+– (16.Ra6?! Ba6 17.Ba6 d5 18.dc5 Bc5=) 16...Ba6 17.Ra6 cd4 (better 17...Nd5 18.Ba3 Nb4 19.Bb4 cb4+–) 18.Ne4?? (better 18.Nd4 c5 19.Nc6+–) 18...de3+= 19.f3 (19.fe3 Ne4 20.Qe4 c5+=) 19...Ne4 (19...d5 20.Nf6 Bf6 21.Ba3= (worse 21.Rc6 Bb2 22.Qb2 d4–/+)) 20.Qe4 (20.fe4 c5 21.Qd3 Qb8=) 20...d5 (20...Qb8 21.Ra2=) 21.Qe3 Bg5 (21...c5!?=) 22.Qc3 (22.f4 Bf6 23.Bf6 Qf6 24.Rc6 Ra8+–) 22...Qb8?? (better 22...Bf6 23.Nd4 Qd7 24.Rc6 Rb8+–) 23.Qg7 1–0. Agiant – HausHeb, lichess.org, 2019.

3.e3 e6 4.Bb2 ba3 5.Na3 Nc6 6.d3 (6.Nf3 Nf6=+) 6...Nf6 7.c4 (7.Nf3 e5!–/+) 7...Bb4–+ 8.Ke2 d5 9.Qc2 (9.Nf3 e5!–+) 9...Qe7 (9...d4 10.Nf3–+) 10.Nb5 (10.cd5 ed5 (10...Ra3?! 11.Ba3 ed5 12.Qb2=) 11.Nb5 Ra1 12.Ba1 0–0–+) 10...Ra1 11.Ba1 0–0 (11...e5 12.d4 dc4 13.de5 Ne5 14.Nf3 Nf3 15.gf3–+) 12.g3 (12.Bf6 Qf6 13.Nc7 dc4 14.dc4 Bd7–+) 12...Ba5 (12...dc4 13.Qc4 e5 14.Bh3–+) 13.Bg2 Rd8 14.Nh3 (14.Qb3 dc4 15.Qc4 Bd7–+) 14...Nb4 (14...e5 15.Rc1–+) 15.Qb2 (15.Qa4 b6–+) 15...dc4 16.dc4 Qc5 17.Rd1?? (17.Qb3 e5 18.Rc1–+) 17...Qc4 18.Kf3 (18.Rd3 Qd3 19.Kf3 Qd5 20.e4 Qe4) 18…Qg4 0–1. Agiant – Cabaretero, lichess.org, 2019.

3.e4 ba3 4.Ra3 Ra3 5.Ba3 Nf6 6.e5 Nd5 7.d4 Nc6 (7...d6 8.Nf3=+) 8.c3 (8.c4 Nb6=+) 8...e6 (8...d6 9.Nf3–/+) 9.Nf3? (better 9.Bf8!? Rf8 10.Qh5=) 9...Ba3 10.Na3 Nc3 11.Qc2 Nd5 12.Bb5 Kf8 (12...Qe7!? 13.Qb3 Qb4 14.Qb4 Ncb4–+) 13.0–0–/+ Na7?? (better 13...Ke8–/+) 14.Qc5+– Qe7 (14...d6 15.Qa7 f6 16.Ra1+–) 15.Qa7 g6 16.Nc4 (16.Bc4 c6+–) 16...Qb4 17.Qc5 Qc5 18.dc5 b6 (better 18...Ke7+–) 19.cb6 cb6 (19...Ke7 20.bc7 Nc7 21.Nd4+–) 20.Nd6 Kg7 21.Ng5 (21.Rc1 Ne7+–) 21...Rf8 (21...f6 22.Nc8 Rc8 23.Bd7+–) 22.Rd1 (better 22.Rc1!? Ne7+–) 22...Nc3 23.Rc1 Nb5 24.Nb5 (24.Rc8?! Nd6 25.Rf8 Kf8 26.ed6 f6+–) 24...Ba6 (24...Bb7 25.Nd6 Bc6 26.Rb1+–) 25.Nc7 (better 25.Nd6!?+–) 25...Bb7 26.Nb5 f6?? (26...Ba6 27.Nd6 h6+–) 27.ef6 Kf6?? (27...Kh6 28.f4 Rf6+–) 28.Nh7 Kg7 29.Nf8 Kf8 30.Nd6 Bc6 31.Nc8 b5 32.Nb6 (better 32.Na7 Be4+–) 32...Ke7 33.Rb1 (33.Ra1 Kd8 34.Ra7 e5+–) 33...Kd6? (33...Kd8+–) 34.Nc8 Kc5 35.Ne7 (35.Rc1 Kd4 36.Ne7 b4 37.Nc6 dc6 38.Rc6 Kd5+–) 35...g5 36.Ng6 b4 37.Ne5 Bb5 38.Nf3 g4 39.Nd2 (39.Ne5!? d6 40.Ng4 Bd3+–) 39...d5 40.h4 (40.Nb3 Kc4+–) 40...gh3 41.gh3 e5 (41...Bd3 42.Rc1 Kd6 43.f4+–) 42.h4 (42.Nb3 Kb6+–) 42...Be2 (42...Bd3 43.Rc1 Kd6 44.h5+–) 43.Nb3 (43.Re1!? Bd3+–) 43...Kc4 44.Na5 (44.Nc1 Bf3 45.Na2 b3+–) 44...Kc3 (44...Kb5 45.Re1 Bd3+–) 45.Nb3 (better 45.Rb3!? Kc2+–) 45...Kc2?? (45...Kc4 46.Nc1 Bh5+–) 46.Re1+– e4 (46...Bg4 47.Na5 b3 48.Nb3 Kb3 49.Re5 d4+–) 47.Re2 Kb3 48.h5 Kc4 (48...d4 49.Re4 d3 50.h6+–) 49.Re3 (better 49.h6 d4 50.h7 Kd3+–) 49...d4 50.Re2 (better 50.Re1 d3 51.h6 Kb3+–) 50...Kd3 (50...d3 51.Re4 Kd5 52.Rb4+–) 51.Rb2 (51.Kf1 Kc3 52.h6 d3 53.Re4 Kc2 54.Rc4 Kb3+–) 51...Kc3 52.Re2 Kd3 53.Kf1 b3 (53...Kc3+–) 54.h6 Kc3 55.h7 b2 56.Rb2! Kb2 57.h8Q Kc2 58.Qd4 Kc1 59.Qe4 Kd1 60.Qe2 (60.Qd3 Kc1+–) 60...Kc1 61.Qd3 (61.f4 Kb1 62.f5 Kc1 63.f6 Kb1 64.Qd3 Kb2 65.f7 Kc1 66.f8Q Kb2 67.Qfa3) 61...Kb2 62.Qc4 Ka3 63.Qb5 (63.f4 Kb2 64.f5 Ka1 65.f6 Kb1 66.f7 Kb2 67.f8Q Kb1 68.Qd3 Kb2 69.Qfa3) 63...Ka2 64.Ke2 Ka3 65.Kd2 Ka2 66.Kc2 Ka3 67.Qb3 1–0. Diaphanous – afsharian, lichess.org, 2018.

3.Nf3 Nf6 =+.

3.Bb2 ba3

4.Ra3 Ra3 5.Ba3 Nc6 6.e3 d6 7.c4 Nf6 8.Nf3 Bg4 (8...e5 9.d4–/+) 9.Be2 g6 (9...e5 10.d4–/+) 10.0–0=+ Bg7 11.Nc3 0–0 12.d4 e5 (12...Re8 13.c5=+) 13.d5 (13.Ne5 A) worse 13...Ne5 14.de5 Be2 15.Ne2+= (15.Qe2?! Nd7=+); B) 13...Be2 14.Nc6 Bd1 (worse 14...bc6 15.Qe2 Nd7 16.Qc2+=) 15.Nd8 Bb3 16.Nb7 Bc4=+) 13...Nb8 14.e4 Nbd7 15.h3 Bf3 16.Bf3 Ne8 17.Nb5 (17.Qb3 b6=+) 17...f5 18.ef5 Rf5 19.Bg4 Rf4 20.Qc1 (20.Qb3 Kh8=+) 20...Nef6 (20...Nb6 21.c5 dc5 22.Be6 Kh8 23.Qc5=+) 21.Bd7 (21.Be6!? Kh8 22.Bd6 cd6 23.Nd6=+) 21...Nd7 22.g3 (22.c5 dc5 23.Bc5 Rf7–/+) 22...Rf3 23.Qd1 Qf8 (23...Rf7 24.Bc1–/+) 24.Kg2 (better 24.Bb4 e4 25.Nc7=+) 24...Rb3?? (better 24...e4 25.Qe2 Qe7–/+) 25.Qb3+– Nb6 (25...Qc8+–) 26.Nc7 Qc8 (26...e4 27.f3 Nd7 28.Qb7+–) 27.Bd6 (better 27.Qb6 Bf8+–) 27...e4 (27...Na8 28.Ne6 e4 29.Ng7 Kg7 30.Rb1+–) 28.Qb6 1–0. alddhsfd (1940) – Galago59 (1900), lichess.org, 2019.

4.Ra3 b6?? 5.Ra8+– Nc6 (5...Bb7 6.Ra4+–) 6.c3 (6.Nf3 f6+–) 6...d6 (6...Nf6 7.e3+–) 7.Qa4 e6 (7...Qd7 8.Rc8! Qc8 9.Qc6 Qd7 10.Qa8 Qd8 11.Qb7+–) 8.e3 (better 8.Qc6 Ke7 9.Ra7 Bd7 10.Rc7 Nf6+–) 8...Nge7 9.Bb5 Qd7 10.e4 (10.Nf3 e5+–) 10...g6 (10...f6 11.Nf3 Kf7 12.Bc6 Nc6 13.Rc8 Qc8 14.Qc6+–) 11.d4 (11.c4 e5 12.Nc3 Kd8+–) 11...Bg7 12.d5! ed5 13.ed5 0–0 14.dc6 Qe6 (14...Qf5 15.Nd2+–) 15.Ne2 Nd5 (15...Qe5 16.Ra7+–) 16.Bc4 Qe5 17.0–0 Nf4 (17...Be6 18.Bc1+–) 18.Nf4 (18.Bf7!? Kf7 19.Nf4 d5+–) 18...Qf4 19.Ba6 (better 19.Bd3 Qg5 20.Ra7+–) 19...Be5?? (better 19...Qa4 20.Rc8 Qa6 21.Rc7 Be5–+) 20.Bc8 (better 20.Qf4 Bf4 21.Bc8+–) 20…Qh2 0–1. Agiant – ytrli2, lichess.org, 2019.

4.Ba3 Nf6 (4...d6 5.e4–/+) 5.e3 (better 5.Be7 Ra1 6.Bd8 Kd8 7.Nf3+=) 5...d6–/+ 6.c4 (6.d4 Bf5–/+) 6...e5 7.Nc3 Be6 8.Bd6?? (better 8.Nf3–/+) 8...Ra1–+ 9.Qa1 Bd6 (9...Qd6?! 10.Nb5 Qd7 11.Qe5–+) 10.Nf3 0–0 11.Nd5 (11.Qb2 b6–+) 11...Bd5 12.cd5 Nd5 (12...e4 13.Nh4–+) 13.Bc4 (13.Ne5 Qf6 14.f4 Nc6–+) 13...c6 (13...Nb6 14.Bd3–+) 14.e4 (14.Bd5 cd5 15.Ne5 Qf6–+) 14...Nf4 15.Ne5 (15.g3 Nh3–+) 15...Be5 (15...Qe7!? 16.d4 Be5 17.0–0–+) 16.Qe5 Nd3 17.Bd3 Qd3 18.Qe7 (18.Qa1 Qe4 19.Kf1–+) 18...Qd7 (better 18...Qb1 19.Ke2 Qh1 20.Qb7 Re8–+) 19.Qc5 (19.Qd7 Nd7 20.Ke2 Re8–+) 19...Rd8 20.0–0 b5 (20...Qd2 21.Qb6–+) 21.d4 (21.Rd1 Qd4 22.Qd4 Rd4–+) 21...Qd4 22.Qc6 (22.Qe7–+) 22…Nc6 (22...Nc6 23.Re1 b4–+) 0–1. alddhsfd (1940) – SillyPutty (1925), lichess.org, 2020.

4.Na3 Na6 5.e3 Nf6 6.Nf3 e6 7.Bd3 (7.Nc4 Bb4=+) 7...Be7–/+ 8.h4 (8.Nb1 d6–/+) 8...Nb4 (8...0–0 9.Nb5–/+) 9.Be2 b6 (9...0–0 10.0–0–/+) 10.Nb5 (10.h5 h6–/+) 10...Ra1 11.Ba1 Bb7 12.Rg1 (12.0–0 0–0–/+) 12...c6 (12...0–0 13.c4–+) 13.Nc3 (13.Bf6 gf6 14.Nbd4 c5–/+) 13...d5 (13...0–0 14.g4–/+) 14.g4 0–0 15.g5 (15.h5 Ne4–/+) 15...Nd7–+ 16.h5 c5 (16...e5 17.d3–+) 17.g6 (17.h6 g6–/+) 17...fg6 18.hg6 h6 19.Nb5 (19.d4 Bc6–+) 19...Nc6 (better 19...d4!? 20.Kf1–+) 20.Rh1 Bf6 (20...e5 21.c4 d4 22.d3–+) 21.Ng1 (21.Nd6 Qb8 22.Nf7 d4–/+) 21...Qe7 (21...Ba1 22.Qa1 Qg5 23.Nf3 Qg6 24.Rg1–+) 22.Bg4 (22.d4!?–/+) 22...Nde5–+ 23.Bh3 (23.Bh5 d4! 24.Rh3 d3–+) 23...Ng6 24.Nf3?? (24.Bf6 A) 24...gf6?! 25.Qh5 Kf7 26.Ne2= (26.Qh6?? Rh8 27.Be6 Qe6 28.Qh8 Nh8 29.Rh7 Kg6 30.Rb7 Nb4–+); B) 24...Rf6?! 25.Bf1–+; C) 24...Qf6 25.Rh2 Nce7–+) 24...Nge5 (better 24...Ba1 25.Qa1 Rf3–+) 25.Ne5 (25.Be5 Be5 26.d4 Bf6–+) 25...Be5 26.f4 (26.d4 cd4 27.ed4 Qb4 28.Qd2 Qb1 29.Qd1 Qb5 30.Be6 Kh7 31.de5 d4–+) 26...Ba1 27.Qa1 e5 28.Ke2 (28.Bg2 d4 29.f5 de3 30.Qa2 Kh8 31.c3–+) 28...ef4 29.Nc3 (29.Bg2 Nb4 30.c3 fe3 31.cb4 Rf2 32.Kd1 Rg2 33.Qb1–+) 29...Nd4 30.Kd1 fe3 31.de3 (31.Re1 Qh4 32.Qa7 Qh3 33.de3 Ra8 34.Qa8 Ba8 35.ed4 Qc3 36.Re8 Kh7 37.Ra8 Qd4 38.Kc1 c4–+) 31...Qe3 32.Qc1 (32.Be6 Kh7 33.Re1 Qe1 34.Ke1 Nc2 35.Ke2 Na1 36.Bd5 Bd5 37.Nd5–+) 32...Qc3 33.Be6 Ne6 34.Rh6 Qd4 (34...Rf1 35.Ke2 Ba6) 35.Qd2 (35.Ke2 Qc4 36.Ke3 Qc3 37.Ke2 Nd4 38.Kd1 Rf1) 35...gh6 (35...Rf1 36.Ke2 Rf2 37.Kd1 Qd2) 36.Qd4–+ Nd4 37.Kc1 Ne6 38.Kb2 d4 (38...h5 39.Ka1 h4 40.Kb2 h3 41.Kb3 Nd4 42.Ka2 Rf2 43.Ka3 h2 44.c3 h1Q 45.cd4 Qf3 46.Ka4 Bc6) 39.Kb3 c4! 40.Ka4 (40.Kc4 Rc8 Skewer) 40…b5! (40...b5 41.Kb5 d3 42.cd3 cd3 43.Kb4 d2 44.Kb3 d1Q 45.Kb4 Rf4 46.Ka5 Ra4 47.Kb5 Qb3) 0–1. TwelveTeen (2480) – penguingim1 (2750), time forfeit, lichess.org, 2017. (=1.a3 a5 2.b4 ab4 3.Bb2 ba3)

4.Na3 Na6 5.e3 (5.e4 Nf6 6.e5 Ne4=+) 5...Nf6 (5...d6 6.Nf3=+) 6.Nf3 e6 7.Rg1 (7.Nb5 Be7–/+) 7...d5 8.g4 (8.Ne5–/+) 8...Bd6 (8...Ne4!?–/+) 9.g5=+ Ne4 10.Bg7 Rg8 11.Bb2 (11.Bh6 c6 12.c4 Nc7=+) 11...Ng5–/+ 12.Ng5 (12.Rg2 Nf3 13.Qf3 Rg2 14.Qg2 Bf8=+) 12...Rg5 13.Rg5 Qg5 14.Qf3 (14.h3 c6–/+) 14...Nb4–+ 15.0–0–0? (15.Rc1 Qg6–+) 15...d4 (15...Qg6!? 16.d3 Na2 17.Kb1–+) 16.Nb5 (16.ed4 Qg6 17.Qb3 Nd5–+) 16...de3 (16...d3!? 17.Nd6 cd6 18.Bd3 Nd3 19.cd3 Qc5 20.Kb1 Qb5–/+) 17.de3 Bd7?? (17...Qc5!? 18.Qe4 Ra5 19.Nd6 cd6=+) 18.Rd6?? (18.Qb7 Bb5 19.Qa8 Ke7 20.Rd6 Kd6+–) 18...cd6?? (better 18...Qc5 19.Nc7 Qc7=) 19.Nc7+– Ke7 20.Na8 Qa5?? (better 20...Bc6 21.Qg3 Qg3 22.hg3 Be4+–) 21.Qf6 Ke8 22.Qh8 Ke7 23.Bf6 1–0. TwelveTeen (2685) – Pizza_in_winter (2655), lichess.org, 2018.

4.Na3 e5 5.e3 (5.Be5!? d6 6.Nb5 Ra1 7.Ba1=) 5...Nc6 (5...Nf6 6.Nb5 Ra1 7.Qa1–/+) 6.Nf3 (6.Nb5 Ra1 7.Qa1 f6–/+) 6...e4 (6...Nf6 7.Nc4 Ra1 8.Ba1–/+) 7.Nd4 Nd4 8.Bd4 Ra3?? (better 8...d5=+) 9.Ra3+– Ba3 (9...d5 10.Ra8+–) 10.Bg7+– Qg5 11.Bh8 f6 (11...d5 12.c4 Bd6 13.Qb1+–) 12.Qa1 Be7 13.Qa4 Qg6 14.Bc4 (14.d3 ed3 15.Bd3 Qg2+–) 14...Nh6 (14...Qg2 15.Rf1+–) 15.Bd5 (15.0–0 Kd8 16.Qb3 Ng4+–) 15...Qg2? (better 15...c6 16.Be4 Qg8 17.Bh7 Qh8 18.Bg6 Kf8+–) 16.Be4+– (worse 16.Qe4 Qg6+–) 16...Qg8 (16...Qg4 17.h3 Qe6 18.Bh7+–) 17.Qa8 Bd8 (17...Qh8 18.Qc8 Bd8 19.Bb7+–) 18.Qc8 (18.Bf6!? Qe6 19.Qc8 Qf6 20.Qb7 c6+–) 18...Qh8 19.Qb7 f5 20.Bg2 Qf6 21.Ke2 (21.d4 c6+–) 21...c6 22.Qb3 (22.Rg1 Qe6 23.Qb2 Bf6 24.Qb8 Kf7+–) 22...Nf7 (22...Bc7 23.f4+–) 23.Qd3 (23.Qb8 Qg6 24.Rg1 Qg4 25.Ke1 Ng5+–) 23...Be7 (23...d5 24.Rg1+–) 24.Qc3 (24.f4 Qg6 25.Bf3 Bf6+–) 24...Ne5 (24...Qc3 25.dc3 Bf6 26.c4+–) 25.f4 (25.Ra1 f4 26.Ra8 Kf7+–) 25...Ng4 (25...Qg6 26.Kf1 Nf7 27.Bf3+–) 26.Qf6 Nf6 (26...Bf6 27.h3 Nh6 28.c4+–) 27.Bf3 (27.Bh3 Ng4 28.Bg4 fg4+–) 27...Nd5 (27...Kf7 28.Ra1+–) 28.h3 (28.Bd5!? cd5 29.Rg1 Kf7+–) 28...Nf6 29.Rg1 Kf7 30.Rg5 (better 30.c4+–) 30...d6 (30...Ke6+–) 31.Rf5 (31.Bc6!? Ke6+–) 31...Ke6 32.Rf6! Bf6 (32...Kf6 33.Bc6 Combination; 32...Bf6 33.Bc6 Combination) 33.Bc6 Ke7 (33...Bb2 34.d4+–) 34.Be4 (34.d4 h6+–) 34...Ke6 (34...h6 35.d4+–) 35.Bh7 Be7 (35...Bb2 36.c4+–) 36.Bd3 (36.Bg8 Kd7+–) 36...Bf6 (36...Bh4 37.Be4+–) 37.Kf3 (37.Bc4 Ke7+–) 37...Kd5 (37...Ke7 38.Be4+–) 38.Kg4 (38.Be4 Ke6+–) 38...Kc5 (38...Bb2 39.Kf5 Kc6 40.h4+–) 39.h4 Be7 (39...Bb2 40.Be4 Kb6 41.d4+–) 40.h5 Bf8 (40...Bf6 41.h6 Bh8 42.Kf5+–) 41.h6! Bh6 42.Kf5 Bf8 (42...d5 43.c3 Kd6 44.Bc2+–) 43.Ke6 Bg7 (43...Kc6 44.f5+–) 44.e4 (44.f5!? Kc6+–) 44...Bh6 45.e5 (better 45.Kf5+–) 45...d5?? (better 45...Bf4 46.ed6 Bd6+–) 46.f5 Bd2 47.f6 Bh6 48.f7 (48.Kd7 Bg5+–) 48...d4 (48...Kd4+–) 49.Ke7 (better 49.Kd7 Kb4+–) 49...Bf8 50.Kf8 Kd5 51.Ke8 Ke6 (51...Kc6 52.f8Q Kb7 53.Qb4 Ka7 54.e6 Ka8 55.Be4 Ka7 56.Qb7) 52.f8Q Ke5 53.Qe7 (53.Kd7 Kd5 54.Qd6) 53...Kd5 (53...Kf4 54.Qe4 Kg3 55.Qe1 Kg4 56.Qf2 Kg5 57.Qg3 Kh5 58.Qg6 Kh4 59.Bf5 d3 60.Qg4) 54.Qd7 (54.Qf6 Kc5 55.Qe5 Kb4 56.Qd4 Ka3 57.Qc3 Ka2 58.Qb3 Ka1 59.Qa3 Kb1 60.c4) 54...Kc5 (54...Ke5 55.Qf5 Kd6 56.Be4 Kc7 57.Qc5 Kb8 58.Qb6 Kc8 59.Qd8) 55.Qd4! Kd4 56.Be4 (better 56.Kd7+–) 56...Kc3?? (better 56...Ke4 57.Kf8 Ke5=) 57.Bf5 (57.Kd7 Kb4+–) 57...Kb4 (57...Kd4 58.Kd7 Kc3 59.Bd3+–) 58.Bg6 Kc3 (58...Kc4 59.Ke7 Kd5 60.Bf7 Kc6 61.c4+–) 59.Ke7 Kd4 (59...Kc4 60.Kd6+–) 60.Ke6 (better 60.Kd6 Kc4+–) 60...Kc3 (60...Kc5 61.Bd3+–) 61.Kd6 (better 61.Kd5 Kb4+–) 61...Kc4 (61...Kb4 62.Bf7 Kc3 63.Bb3+–) 62.Ke5 (better 62.Bd3!? Kc3+–) 62...Kc5 63.Ke4 (63.Bf5 Kc6 64.Be4 Kc5+–) 63...Kc4 64.Ke3 Kc3 ½–½. TwelveTeen (2615) – penguingim1 (2760), time forfeit, lichess.org, 2016. (=1.a3 a5 2.b4 ab4)

4.Na3 f5 5.e4 (5.e3!?=+) 5...fe4–/+ 6.Bc4 (6.d3 ed3 7.Bd3–/+) 6...Ra5 (6...Nf6 7.Nb5 Ra1 8.Ba1–+) 7.Nh3 (better 7.Bg8!? Rg8 8.Qe2=+) 7...Nf6 8.Nb5 (8.Bc3 Ra8 9.Ng5 d5 10.Bb5 Nc6–+) 8...Ra1–+ 9.Qa1 (9.Ba1 d5 10.Bf6 ef6 (10...gf6?? 11.Qh5 Kd7 12.Qd5 Ke8 13.Qf7 Kd7 14.Be6 Kc6 15.Na7 Kd6 16.Nc8 Kc6 17.Nf4+–; 10...dc4?! 11.Qh5 Kd7 12.Be5+–) 11.Qh5 Ke7–+) 9...c6 (9...d5 10.Be2 c6 11.Na7 Bh3 12.gh3–+) 10.Nd4? (better 10.Na7–/+) 10...d5–+ 11.Be2 (11.Bb3 e5 12.Ne2–+) 11...e6?? (better 11...e5 12.Nb3 Bh3 13.gh3 d4–+) 12.Ng5=+ e5 13.Nde6 Be6 14.Ne6 Qd7 (14...Qe7 15.Qa8 Qe6 16.Qb8 Kf7 17.Be5–/+) 15.Nf8=+ Rf8 16.Be5 Kf7 17.h3 (better 17.Bf6 gf6 18.0–0=+) 17...Re8?? (17...Qe7 18.Qb2–/+) 18.Bd4?? (better 18.Bf6 gf6 19.Bh5 Kg7 20.Be8 Qe8 21.Qa7+–) 18...Qc7?? (18...Qd6 19.Qa7–/+) 19.0–0?? (better 19.Bf6 gf6 20.Bh5 Ke7 21.Be8 Ke8 22.Qf6+–) 19...Nbd7–/+ 20.Rb1 c5 21.Bc3 (21.Qc3 Rc8 22.Bf6 Nf6–/+) 21...d4 22.Bc4 (22.Qa2 Kf8 23.Bb2 Qf4–/+) 22...Kf8 23.Bb2 b6 (23...Qf4 24.d3–/+) 24.Ba3 (better 24.Bb5–/+) 24...g6?? (better 24...Qd6–/+) 25.Qd4+= Kg7 26.Qe3 Ne5 27.Bf1 (27.Bb5 Re7+–) 27...Rd8 (27...Nc6!?+=) 28.Bb2+– Qd6 (28...Nc6 29.Qe4 Nd4 30.Qd3+–) 29.f4 (29.d3 Qe6+–) 29...Nf7+– 30.g4 (30.Qe4 Kg8 31.Qf3 Nh5+–) 30...Kg8 (better 30...Kf8+=) 31.g5 (31.Bc4!?+–) 31...Nh5 (31...Nd5 32.Qe4 Qf4 33.Qf4 Nf4 34.Bf6+–) 32.Qe4 (32.Bc4 A) 32...Nf4 33.Bf7 Kf7 34.Rf1 Qd2 35.Rf4 (35.Qf4?! Qf4 36.Rf4 Ke6+–) 35...Kg8 36.Qe4 Qd1 37.Kf2 Qd2 38.Kg3+–; B) 32...Qf4 33.Qf4 Nf4 34.Bf7 Kf7 35.Rf1+–; C) 32...Qd2 33.Qe4 Kf8+=) 32...Qf4 (32...Ng3 33.Qe3 Nf1 34.Kf1 Qd2 35.Qd2 Rd2 36.Bf6+=) 33.Qf4 Nf4 34.Bg2?? (34.Bf6 Rd5 35.h4+– (35.Rb6?! Ng5 36.Bc4 Nf3 37.Kh1 Nd2 38.Bd5 Nd5+–)) 34...Ne2 (better 34...Rd2 35.Bc6 Ng5–+) 35.Kf2= Nd4 (35...Rd2 36.Ke3 Rc2 37.Bf6=) 36.Ke3 (36.Bd4 Rd4 37.Ke3 Rd6=) 36...Nf5 (36...Nc2!? 37.Ke2 Rd6–/+ (worse 37...Ng5 38.Bf6 Nd4 39.Kd1+–)) 37.Ke2= Ng5 38.Kf2?? (better 38.Bf6 Re8 39.Kf2 Ne4 40.Be4 Re4 41.Rb6 Rf4 42.Ke2=) 38...Ne4 (better 38...Rd2 39.Kg1 Ne3–+ (39...Rc2?! 40.Bc1 Nf7 41.Bf4–+)) 39.Be4+– Rf8?? (better 39...Rd2 40.Ke1 Rd8+–) 40.Kf3 (better 40.Bd5 Rf7 41.Be5+–) 40...Ne7 (40...Nd6 41.Ke3 Re8 42.d3+–) 41.Ke3 (better 41.Kg4 Rd8 42.d3+–) 41...Nd5 (41...Nf5 42.Bf5 Rf5+–) 42.Bd5 Rf7 43.Be4 (43.Rf1! Kf8 44.Rf7 Ke8 45.Bf6 g5 46.Rg7 h6 47.Be6 g4 48.Rg8) 43...Kf8 (43...Re7+–) 44.Rf1! Ke8?? (44...Rf1 45.d4 Combination) 45.Rf7 (better 45.Ra1+–) 45...Kd8 (45...Kf7 46.Kd3 b5+–) 46.Bd5 (46.Bf6 Kc8 47.Bd5 Kb8 48.Be6 Ka8 49.Be5 c4 50.Bd5) 46...Kc8 (46...c4 47.Bf6 Ke8 48.Rg7 b5 49.Be6 b4 50.Rg8) 47.Be4 (47.Be6 Kd8 48.Bf6 Ke8 49.Rh7 c4 50.Rh8) 47...Kb8?? (47...Kd8 48.Bf6 Kc8 49.Bd5 Kb8 50.Be6 Ka8 51.Be5 c4 52.Bd5) 48.Bd5 (48.Be5 Kc8 49.Bc6 Kd8 50.Bd6 c4 51.Rf8) 48...Kc8 49.Be6 Kd8 50.Be5 Ke8 (50...b5 51.Bd6 h6 52.Rf8) 51.Bd6 Kd8 (51...c4 52.Rf8) 52.Rf8 1–0. TwelveTeen (2645) – ChrolloL (2650), lichess.org, 2018.

4.Na3 g6?? 5.Bh8+– Nf6 6.Bf6 (6.Nf3 d5+–) 6...ef6 7.e3 (better 7.Nb5 Ra1 8.Qa1+–) 7...Ra3+– 8.Nf3 Ra1 9.Qa1 Nc6 10.c4 (10.Bb5 Nb4 11.Qc3 b6+–) 10...Bg7 (10...g5 11.Be2+–) 11.Be2+– Kf8 12.0–0 Kg8 13.Qc1 d6 14.d4 f5 15.Qb2 (15.Re1 Qf6+–) 15...b6 16.Ra1 Bb7 17.Qa3 h5 (17...f4 18.d5 Ba1 19.dc6 (19.Qa1?! Na5=) 19...Bc6 20.Qa1 fe3 21.fe3+–) 18.h3 (18.Ra2 h4+–) 18...d5 (18...f4 19.d5 Ba1 20.dc6 (20.Qa1?! Na5=) 20...Bc6 21.Qa1 fe3 22.fe3+–) 19.Qa2 (19.Qb3 dc4 20.Bc4 Qf6+–) 19...dc4 20.Bc4 Qe7 21.Qa4 (21.Qb2 f4 22.Ra3 Qd6+–) 21...Nd8 (21...Na5 22.Bb5+=) 22.Ba6 (22.Qb3 Bf3 23.gf3 f4+–) 22...Ba6? (better 22...Bf3 23.gf3 c5+=) 23.Qa6+– Ne6 (23...f4 24.ef4 Qd7 25.Ra4+–) 24.Qa8 (24.Qc8 Bf8+–) 24...Kh7 25.Qb7 Bf6 (25...f4 26.Ra7 fe3 27.fe3+–) 26.Qd5 (better 26.Ra7!?+–) 26...c5 27.dc5?? (better 27.Rb1 cd4 28.Nd4 Nd4 29.ed4+–) 27...Ba1–/+ 28.cb6 Qd8 29.b7? (better 29.Qd8 Nd8 30.Nd2–+) 29...Qb8?? (better 29...Qd5 30.b8Q Nc5–+) 30.Qc6 (better 30.Qd7 Nd8 31.Qc8 Qb7 32.Qd8 Qb1 33.Kh2=) 30...Be5?? (better 30...Nc7=) 31.Qc8 (better 31.Ne5 Nd8 32.Qc8 Qb7 33.Qd8+–) 31...Bc7 32.Ng5?? (32.Nd4 Nd8 33.Nb5–+) 32...Kg7 (better 32...Ng5 33.f3 Ne6–+) 33.h4?? (better 33.Ne6 fe6 34.Qe6=+) 33...Kf6 (better 33...Nc5–+) 34.Ne6–/+ fe6 35.f4 (35.f3 Ke7–+) 35...e5 36.Qb8? (better 36.fe5 Ke5 37.Kf2–+) 36...ef4 (better 36...Bb8 37.Kf2 ef4–+) 37.Qc7 fe3 (37...f3 38.b8Q f2 39.Kf2 Ke6 40.Qd6 Kf7 41.Qbf8) 38.Qc6 (38.b8Q Ke6 39.Qd6 Kf7 40.Qbf8) 38...Ke5 (38...Kg7 39.Qd7 Kh6 40.b8Q f4 41.Qf8) 39.b8Q (39.b8Q Kd4 40.Qbd6) 1–0. alddhsfd (2030) – MElih027 (2000), lichess.org, 2021.

4.Na3 Nc6

5.Nc4 Ra1 6.Ba1 d5 7.Ne3 e6 8.c3 Nf6 9.Nc2 Be7 10.e3 Bd7 11.Bb5 0–0 12.Nf3 Na7 13.Bd3 c6 14.c4 Qc7 15.cd5 cd5 16.Ncd4 b5 17.0–0 b4 18.Qb1 Nc6 19.Nc6 Bc6 20.Rc1 Qd7 21.Qc2 Ba4 22.Qb1 Rb8 23.Bc2 b3 24.Bd3 h6 25.Be5 Rb7 26.Ba6 0–1. Nautiluschess – meregrand, ICS, 2001.

5.e3 Nf6 6.Nf3 d5 (6...e5 7.Nc4 Ra1 8.Ba1–/+) 7.Bd3 (7.Bb5 Bg4=+) 7...Nb4 (7...e5 8.Bb5 Bg4 9.h3 Bf3 10.Qf3–/+) 8.Be2 Bf5 9.0–0 e6 10.Nd4 (10.Nh4 Bg6=+) 10...Bg6–/+ 11.Ndb5 c6 12.Nc7 Qc7 13.Nb5 cb5 Will c2 fall? 14.Ra8 Ke7?? (better 14...Kd7=+) 15.Ba3+– Kd7 (15...Ne8 16.Bb4 Nd6 17.Bb5+–) 16.Bb5 Nc6 17.Bf8 Qb6 (17...Rg8 18.Qa1 Ne8 19.Qa3+–) 18.Bc6 Qc6 19.Qa1 Ne8 (19...Rf8 20.Rf8 Ke7 21.Qa8+–) 20.Qa3 (better 20.Re8 Ke8 21.Bg7+–) 20...Qb5 (20...Nd6 21.Ra1+–) 21.Qa2 (21.Qe7 Kc6 22.Qe8 Kb6 23.Qd8 Kc6 24.Qd6) 21...Kc6?? (better 21...Rf8 22.Rb1 Qc6+–) 22.Rc8 (better 22.Re8 Rf8 23.Rf8 Qb6+–) 22...Nc7 (22...Kd7 23.Re8! Ke8 24.Bg7+–) 23.Qa3 Kb6 (23...Rf8 24.Qf8 Qb2+–) 24.Qd6 Qc6 25.Rb1 Nb5 (25...Ka7 26.Qc6 bc6 27.Rc7 Ka6 28.Rc6 Ka5 29.Rc3 Bc2 30.Rc2 Rf8 31.Ra2) 26.Rc6 bc6 27.Qc5 (27.Qb8 Ka5 28.Ra1 Na3 29.Ra3) 27...Kc7 28.Rb5 Kd7 (28...Rf8 29.Qe7 Kc8 30.Rb7 Bc2 31.Qd7) 29.Bd6 (29.Qd6 Ke8 30.Rb8) 29...e5+– 30.Rb7 Ke6 31.Re7 (31.g4 Kf6 32.Be7 Ke6 33.Qc6) 31...Kf5 32.Re5 Kf6 33.Qd4 Bf5 34.Qf4 (34.Re6 Ke6 35.Qe5 Kd7 36.Qe7 Kc8 37.Qc7) 34...g6 35.Rf5! Kg7 (35...gf5 36.Qh6 Mate attack) 36.Be5 (36.Rf7 Kg8 37.Rf8 Kg7 38.Be5) 36...f6 37.Bf6 Kf7 (37...Kf8 38.Qd6 Kg8 39.Qe7 gf5 40.Qe8) 38.Qh6 (38.Qc7 Ke6 39.Re5 Kf6 40.Qe7) 38...gf5 (38...Ke6 39.Bh8 Kd6 40.Qf8 Kc7 41.Rf7 Kb6 42.Bd4 Ka6 43.Ra7 Kb5 44.Qc5) 39.Qg7 Ke6 40.Qe7 1–0. TwelveTeen (2560) – penguingim1 (2760), lichess.org, 2016. (=1.a3 a5 2.b4 ab4 3.Bb2 ba3)

5.Nf3 e5 (5...Nf6 6.e3–/+) 6.Nb5 (better 6.Ne5!? Nf6 7.Nb5 Ra1 8.Ba1=) 6...Ra1–/+ 7.Qa1 Bd6?? (better 7...d6–/+) 8.Ne5+– (8.Be5?! Be5 9.Ne5 Nge7=) 8...Nf6 (better 8...Bb4 9.Qa4 Bf8+–) 9.Nc6 (better 9.Nd6 cd6 10.Nc4+–) 9...dc6+= 10.Nd6 cd6 11.Bf6 Qf6 (11...gf6 12.e3+=) 12.Qf6 gf6 13.e3 (13.d4 Be6+=) 13...Be6 (13...Bf5 14.d3+=) 14.Bd3 (14.d4 h6+=) 14...Ke7 15.Ke2 h6 (15...b5 16.Ra1 f5 17.Ra6+=) 16.Rb1 (16.Ra1 Rd8+=) 16...Rb8 (16...b5 17.Ra1 f5 18.Ra6+=) 17.Rb6 Kd7 18.Rb2 (18.h3 h5+=) 18...Kc7 (18...b5 19.Rb4 Rg8 20.g3+=) 19.f3 (19.Rb4 Rg8+=) 19...Bd7 (19...f5 20.Rb4+=) 20.g4 (20.Rb4 Rg8 21.g3 f5+–) 20...b6 (20...Rh8 21.h4+=) 21.h4 (21.Ra2 b5+–) 21...c5 (21...Ra8 22.Rb4 f5 23.Bf5 Bf5 24.gf5+–) 22.Kf2 (22.Bb5 Bb5 23.Rb5 f5+=) 22...Bc6 (22...d5 23.Ra2+=) 23.Kg3 (23.Ra2 b5+–) 23...d5 (23...b5 24.Kf4+–) 24.Kf4 (24.Ra2 b5+–) 24...Kd6 (24...Ra8 25.Be2+–) 25.Kf5 Ke7 (better 25...c4 26.Be2 Ke7+–) 26.Kf4 (26.Bb5 Bb7+–) 26...Kd6 27.c4 (27.Ra2 Bd7+–) 27...d4 (27...dc4 28.Bc4 b5 29.Bf7+–) 28.ed4 (28.h5 Bd7+–) 28...cd4 29.Be4 Bd7 30.d3 Be6? (30...b5 31.cb5 Rb5 32.Ra2+–) 31.Bf5 (31.Rb5 Kd7+–) 31...Kc6 (better 31...Kc7+–) 32.Be4 Kd6 33.Rb5 Bd7 (33...Kd7 34.Rh5 Ke7 35.Rh6+–) 34.c5! Kc7 (34...bc5 35.Rb8 Pinning (35.Rb8 Deflection)) 35.Rb6 (better 35.cb6!? Rb6 36.Rc5 Kd6 37.Rd5 Ke7 38.Rd4+–) 35...Rb6+– 36.cb6 Kb6 37.Bd5 Kc5 (37...Bb5 38.Ke4 Kc5 39.Bf7 Bc6 40.Kf4+–) 38.Bf7 Kd6 (38...Bb5 39.Bg6+–) 39.Bg6 Be6 40.Bf5 Bf7 (40...Bd5 41.Kg3+–) 41.Be4 (41.g5 fg5 42.hg5 hg5 43.Kg5+–) 41...Ke6 (better 41...Be6+–) 42.Bf5 (42.h5!? Be8+–) 42...Kd6 43.Ke4 (43.g5 fg5 44.hg5 hg5 45.Kg5 Ke7+–) 43...Kc5+– 44.Kf4 (44.Bh7 Be6+–) 44...Bd5?? (44...Kd6 45.g5 fg5 46.hg5 hg5 47.Kg5 Ke7+–) 45.Be4+– Bf7?? (better 45...Be6+–) 46.Kf5 h5 (46...Kd6 47.Kf6 Bb3+–) 47.Kf6 Be8 48.g5 (better 48.Bg6 hg4 49.fg4+– (49.Be8? g3–+)) 48...Bd7 (48...Ba4+–) 49.g6 Be6 50.g7 (better 50.Ke6 Kb4 51.f4+–) 50...Bg8 51.Kg6 (51.Bg6!? Kb4+–) 51...Kd6 52.Kh5 Bf7 53.Kg5 Bg8 54.h5 Kc5 55.h6 Kd6 56.h7 Bh7 57.Bh7 Kc5 58.g8Q Kb4 59.Be4 Kc3 60.Qd5 Kd2 (60...Kc2 61.Qa2 Kc3 62.Qb1 Kd2 63.Qb2 Ke3 64.Bb7 Kd3 65.Ba6 Ke3 66.Qe2) 61.Qd4 (61.Qb3 Ke2 62.Qc2 Ke1 63.f4 Kf1 64.Qd2 Kg1 65.Qg2) 61...Ke2 (61...Kc2 62.Qc4 Kd1 63.d4 Ke1 64.Kf4 Kf2 65.Qc2 Kf1 66.Bd3 Kg1 67.Kg3 Kh1 68.Qg2) 62.Qe5 (62.Qb2 Ke3 63.Bh7 Kf3 64.Qd2 Kg3 65.Be4 Kh3 66.Qg2) 62...Kd2 63.d4 (63.Qb2 Ke3 64.Qc3 Ke2 65.d4 Kf2 66.Qd2 Kg1 67.d5 Kf1 68.f4 Kg1 69.Qg2) 63...Ke2+– 64.d5 Ke3 (64...Kd2 65.Qd4 Ke2 66.Bd3 Kd2 67.d6 Ke1 68.Qe3 Kd1 69.Qe2 Kc1 70.Qc2) 65.d6 (65.Qc3 Kf2 66.Qd2 Kg1 67.f4 Kf1 68.d6 Kg1 69.Qg2) 65...Kf2 (65...Kd2 66.d7 Ke3 67.Bc2 Kd2 68.d8Q Kc2 69.Qc5 Kb3 70.Qd3 Ka4 71.Qdc4) 66.Qd4 (66.d7 Ke3 67.d8Q Ke2 68.Qg3 Ke3 69.Qd3) 66...Kg3 (66...Ke2 67.Qd3 Kf2 68.Qd2 Kg1 69.d7 Kf1 70.f4 Kg1 71.Qg2) 67.d7 (67.Qg1 Kh3 68.Bf5) 67...Kg2 68.f4 Kg3 (68...Kf1 69.Qd2 Kg1 70.Qg2) 69.f5 (69.Qg1 Kh3 70.Qg2) 69...Kh3 (69...Kh2 70.Qb2 Kg3 71.Qg2) 70.f6 (70.Qh8 Kg3 71.Qh4) 70...Kg3 (70...Kh2 71.Qb2 Kg3 72.Qg2) 71.Qd3 (71.Qg1 Kh3 72.Qg2) 71...Kh2 (71...Kf2 72.f7 Kg1 73.Qg3 Kf1 74.Bd3) 72.f7 (72.Qc2 Kg3 73.Qg2) 72...Kg1 73.Bf5 (73.Qg3 Kf1 74.Bd3) 73...Kh2 (73...Kg2 74.Qe2 Kg3 75.Be4 Kh3 76.Qg2) 74.f8Q Kg1 (74...Kg2 75.Be4 Kh2 76.Qf2) 75.Qe7 (75.Qe7 Kf2 76.Qc5 Kg2 77.Qh3; 75.Qc5 Kg2 76.Qh3) 1–0. TwelveTeen (2640) – penguingim1 (2755), time forfeit, lichess.org, 2017. (=1.a3 a5 2.b4 ab4 3.Bb2 ba3)

5.Nf3 Nf6 6.Rg1 (6.Nb5 Ra1 7.Ba1 Ne4=+) 6...b6 (6...e5 7.Nb5 Ra1 8.Ba1–+) 7.g4 Bb7 (7...e5 8.Nb5 Ra1 9.Qa1–/+) 8.g5 Ne4 9.e3 (9.Nb5 Ra1 10.Qa1 f6–/+) 9...Nc5 (9...e5–/+) 10.Bd3 (10.Bg2 Na4 11.Be5 d6–/+) 10...Na4 (10...Nd3 11.cd3 Nb4 12.Ne5–+) 11.Bc1–/+ e6 (11...e5 12.Bb5 e4 13.Nh4–+) 12.Nb5 (12.Bb5 Ra5–/+) 12...Nc5 (12...Ra5 13.Ba3–+) 13.Ra8 Nd3 14.cd3 Ba8 15.Bb2 (15.Qa4 Bb7–+) 15...Bb7 (15...Nb4 16.Ne5 Bc6 17.Na7–/+) 16.h4 (16.Qc2!?–/+) 16...Ba6–+ 17.Qa4 Nb4 18.Bc3? (better 18.Bg7 Nd3 19.Ke2–+) 18...Nd3 19.Ke2 (19.Kd1 Nc5 20.Qb4–+) 19...Nc5 20.Qb4 c6 21.d3 (21.Nfd4 e5 22.Kd1 ed4 23.Nd4 Nd3–+) 21...Bb5 22.Ne5 (22.Nd4 Nd3 23.Qb1 Bc4–+) 22…Nd3 (22...Nd3 23.Qb5 Nf4 24.ef4 cb5–+) 0–1. TwelveTeen (2635) – Summer_Marathons (2715), lichess.org, 2018.

4.Na3 e6

5.Nb5 Ra1 6.Qa1 Nf6 (6...f6 7.Na7=+) 7.Qa5 (7.Bf6 gf6 8.Na7 Bg7=+) 7...Na6–/+ 8.Nf3 Be7 (8...b6 9.Qa1–/+) 9.e3 0–0 (9...b6 10.Qa4–/+) 10.Nbd4 (10.Na7 b6 11.Qa2 Nc5–/+) 10...b6 11.Qa1 Nc5 12.g4 (12.Bc4 Bb7–/+) 12...d6 (12...Ng4!? 13.Rg1 f5 14.h3–+) 13.g5 (13.Nc6 Qd7 14.Ne7 Qe7 15.Bf6 gf6 16.d4–/+) 13...Ne8 (13...Nh5!?–/+) 14.Nc6=+ Qd7 15.Bb5 (15.Nb8!? Qa4 16.d4=+) 15...Bb7–/+ 16.Ncd4 (16.Nfd4!? Bg5 17.Na5–/+) 16...c6–+ 17.Be2 (17.Bc4 e5 18.g6 hg6–+ (18...ed4?! 19.gf7 Rf7 20.Bf7 Kf7 21.Nd4–+)) 17...e5 18.Nb3 f5 (better 18...Nb3!? 19.cb3 e4–+) 19.h4 (19.Nc5 A) 19...dc5? 20.Ne5 (20.Be5?! b5=) 20...Qd8 21.Bc4 Kh8 22.Nf7 Rf7 23.Bf7+–; B) 19...bc5 20.g6 e4 21.gh7 Kh7–/+) 19...Nc7 20.h5 (20.Nc5 bc5 (worse 20...dc5 21.Ne5 Qc8 22.Nc4+–) 21.Qa7 Bc8–/+) 20...N7e6 (20...Ra8 21.Qc1–+) 21.h6 (21.Nc5 bc5 (21...dc5 22.Ne5 Qd5 23.Bf3+–) 22.h6 Ra8–+ (22...Ng5 23.Bc4 d5 24.Ne5=)) 21...g6 (21...Nb3 22.cb3 g6 23.Bc4–+) 22.d4 (better 22.Nc5!? bc5 23.Qa2–+) 22...Nb3 23.cb3 e4 (23...Ng5?! 24.Ng5 Bg5 25.de5–/+; 23...Bg5?! 24.de5 Be7 25.ed6 Bd6 26.Qc1–/+) 24.d5 cd5 25.Nd4 Ra8 26.Qd1 (26.Ba3 Ng5 (26...Bg5?! 27.Ne6 Ra3 28.Qa3 Qe6 29.Qa7=+) 27.Nf5 Bd8 28.Nd6 Ra3 29.Qa3 Be7 30.Ne4 Ne4–+ (30...Ba3 31.Nf6 Kf7 32.Nd7+–; 30...de4?! 31.Bc4 Nf7 32.Qa1 Bb4 33.Kf1–+)) 26...Ng5 27.Bb5 (27.Nc2 Ne6–+) 27...Qc7 28.Rg1 Bf6 29.Rg5 Bg5 30.Ne6 Qe7 31.Ng5 Qg5?? (31...Ra2 32.Qd4 Rb2 33.Qb2 Qe5+–) 32.Qd4 Qg1 (32...Qf6 33.Qf6 Ra1 34.Ba1 d4 35.Qg7) 33.Bf1 (33.Ke2 Qg4 34.Kd2 Qd1 35.Kd1 Ra1 36.Ba1 Kf7 37.Qf6 Kg8 38.Qg7) 33...Kf7+– 34.Qf6 Ke8 35.Qd6 Qg5 36.Bf6 Ra1 37.Kd2 (37.Ba1 Qe7 38.Qb6 Kf7+–) 37…Qf6 (37...Qf6 38.Qf6 Rf1 39.Qh8 Kd7 40.Qh7 Kc6 41.Qg6 Kb5+–) 0–1. TwelveTeen (2605) – penguingim1 (2780), time forfeit, lichess.org, 2017. (=1.a3 a5 2.b4 ab4 3.Bb2 ba3)

5.e3 Nf6 6.Nb5 Ra1 7.Qa1 (7.Ba1 Be7–/+) 7...Na6 (7...Be7 8.Nf3–/+) 8.Nf3 c6 (8...Be7 9.Be2–/+) 9.Nc3 (9.Bf6 Qf6 10.Qf6 gf6=+) 9...Be7 (9...d5 10.Be2–/+) 10.Bd3 (10.Be2 0–0–/+) 10...0–0 (10...Nb4–/+) 11.g4 (11.Ba6 ba6 12.0–0 Qc7–/+) 11...Nc7 (11...Ng4!? 12.Rg1 f5 13.h3–+) 12.g5–/+ Nfe8 13.Ne4 d5 (13...c5 14.Rg1–/+) 14.Ng3 f6 (14...c5 15.Nh5 e5 16.Ne5 Bg5 17.Nf3–/+) 15.h4 (15.gf6 Bf6 16.Bf6 Nf6–/+) 15...Nd6 (15...Na6 16.Qb1–/+) 16.h5 (16.Rg1 fg5 17.Ng5 g6=+) 16...e5 (16...fg5 17.Be2 Bf6 18.h6 Bb2 19.Qb2–/+) 17.h6 (17.gf6 gf6 18.Rg1–/+) 17...g6 (17...e4 18.hg7 A) 18...Kg7? 19.gf6 Rf6 20.Nh5 Kf7 21.Ng5 (worse 21.Nf6 ef3 22.Rh7 Ke6+–) 21...Kg6 22.Qd1+– (worse 22.Nf6 Bg4 23.Ng4 Bg5 24.Ne5 Kf5+–); B) 18...Rf7–+) 18.gf6= Bf6 19.Be5 (19.Ne5 Nce8=) 19...Qe7 20.Qb2 Ne6 (20...Qd8 21.Be2=) 21.Bf6= Rf6 22.Ne2?? (better 22.Ne5 Ng5 23.f4=) 22...Rf3–+ 23.Nd4 (23.Bg6 Qf6 (23...hg6?! 24.h7 Qh7 25.Rh7 Kh7 26.d3–+) 24.Qf6 Rf6–+) 23...Nd4 (23...Qf6!? 24.Qc3 Rf2 25.Ne6 Be6 26.Qf6 Rf6 27.c3–+) 24.Qd4 Rf8 (24...Rf6 25.f4–+) 25.Qc3 (25.Bg6 Qf6 26.Qf6 Rf6 27.Bd3–+) 25...Bf5 26.Qb4 (26.Bf5 Nf5 (worse 26...gf5 27.Rg1 Kf7 28.Rg7 Ke8 29.Re7 Ke7 30.Qe5 Kd7 31.d3+–) 27.Ke2 b5–+) 26...Bd3 27.cd3 Qe6 (better 27...Rf2! 28.Qg4 Qf6 29.Qg3–+) 28.Qb2 Rf7 29.Qb6 (29.f4 Qg4 30.Kf2 Nf5–+) 29...Qe8 (29...Qf6 30.Rh2–+) 30.Qc5 (30.f4 Qe6 31.Qd8 Rf8–+) 30...Nf5 (30...Qe5 31.Qa5–+) 31.Qc3 (31.f4 Qa8 32.Qc1 b5–+) 31...d4 32.f4 (32.Qb2–+) 32...dc3 33.e4 cd2 (33...Ng3 34.dc3 Nh1 35.Kf1 Rf4 36.Ke2 Rf2 37.Ke3 Qe5 38.c4 Qc5 39.d4 Qa3) 34.Kd2 Nd6 (34...Qe7 35.ef5 Qb4 36.Kd1 Qb1 37.Kd2 Qb2 38.Ke1 Re7 39.Kf1 Qd2 40.fg6 Re1) 35.Rf1 Rd7 (35...Ne4 36.Kc2 Qe7 37.Re1 Qc5 38.Kd1 Nf2 39.Kd2 Qb4 40.Kc2 Qe1 41.f5 Rf5 42.d4 Qe2 43.Kb1 Rb5 44.Kc1 Nd3) 36.f5 Ne4 37.Kc2 Nf6 (37...Qa8 38.Rb1 Qa4 39.Rb3 Nc5 40.Kb2 Qb3 41.Ka1 Rd3 42.fg6 Rd1) 38.fg6 Qg6 (38...Qe2 39.Kc1 Qf1 40.Kb2 Qe2 41.Ka3 Rd3 42.Ka4 Qc2 43.Ka5 Qc5 44.Ka4 Ra3) 39.Rf6 Qf6 (39...Qd3 40.Kb2 Qe2 41.Kb3 Rd3 42.Ka4 Qc2 43.Kb4 Qc3 44.Ka4 b5) 40.Kd2 (40.d4 Qd4 41.Kb1 Qc3 42.Ka2 Rd2 43.Kb1 Qb2) 40...Qd4 41.Ke2 (41.Kc2 Qd3 42.Kb2 Qd2 43.Kb1 Re7 44.Ka1 Re1) 41...Qd3 42.Ke1 (42.Kf2 Re7 43.Kg2 Re2 44.Kg1 Qd1) 42...Qc3 (42...Qc2 43.Kf1 Rd1) 43.Kf2 (43.Kf1 Qc2 44.Ke1 Rd1) 43...Rd2 44.Kg1 (44.Kf1 Qc1) 44…Qc1 0–1. TwelveTeen (2615) – penguingim1 (2775), lichess.org, 2017. (=1.a3 a5 2.b4 ab4 3.Bb2 ba3)

5.e3 Nf6 6.Nf3 Be7 7.Bd3 (7.Be2 0–0=+) 7...0–0 8.g4 (better 8.Qe2!?–/+) 8...Ng4–+ 9.Rg1 f5 10.h3 (10.Be2 Nf6–+) 10...Bf6 (10...Nf6 11.Nb5 Ra1 12.Qa1–+) 11.Nc4 Ra1 12.Ba1 (12.Qa1 Nh6–+) 12...Ba1 13.hg4 (13.Qa1 Nf6–+) 13...Bf6 14.gf5 d5 15.Nce5 ef5 16.Rh1? (16.Be2 Nd7 17.Nd7 Bd7–+) 16...c6 (16...Qd6 17.Ng4 fg4 18.Bh7 Kf7 19.Ng1–+) 17.Nh4?? (better 17.Be2–+) 17...Be5 (17...Bh4?! 18.Qh5 Qf6 19.Qh4 Qe5 20.Qh7 Kf7 21.f4–+) 18.Qh5 Qf6 19.Nf3 h6 20.Rg1 Nd7 (20...Kh7!? 21.Ne5 Qe5 22.c3–+) 21.Rg6 Qf7 (21...Qe7 22.Qh6 Rf6 23.Qg5–+) 22.Qh6 Re8 (better 22...Bf6!? 23.Ng5 Bg5 24.Rg5–+) 23.Ng5 Nf8 (better 23...Kf8 24.Qh5 Qg8 25.Bf5 Nf6–+) 24.Nf7–/+ Kf7 25.Qh5 (better 25.Rg7 Bg7 26.Qh5 Ke7 27.Bf5 Bf5 28.Qf5–/+) 25...Kg8?? (better 25...Ng6 26.Bf5 Bf5 27.Qf5 Bf6–+) 26.Bf5 (better 26.Rc6! Bd7 27.Rb6+–) 26...Bf5 27.Qf5 Ng6 28.Qg6 Re7 (28...Kf8 29.Qg4+–) 29.Qg4 Bf6 30.Qc8 Kf7 31.Qd8?? (better 31.Qf5+–) 31...Re3!!–+ 32.fe3 (32.de3 Bd8 Discovered attack; 32.fe3 Bd8 Discovered attack) 32…Bd8 0–1. TwelveTeen (2655) – ChrolloL (2645), lichess.org, 2018. (=1.a3 a5 2.b4 ab4 3.Bb2 ba3)

5.e3 Nf6 6.Nf3 Be7 7.Rg1 (7.Be2 Nc6=+) 7...0–0 8.g4 (8.Nb5 Ra1 9.Qa1 d6–/+) 8...d5 9.g5 (9.Nb5 Na6–/+) 9...Ne4 10.h4 c5 (10...c6 11.c4–/+) 11.Nb5 Ra1 (11...Na6!?–/+) 12.Qa1=+ f5 (12...f6 13.d3 fg5 14.de4 Rf3 15.Bg7+=) 13.h5?? (better 13.Bg7 Re8 14.d3+–) 13...Ng5?? (13...f4 14.Be2 fe3 (worse 14...Ng5 15.Ng5 fe3 16.fe3+–) 15.fe3 Bd7 16.Bg7 Bb5=+) 14.Ng5+– Bg5?? (better 14...d4 15.Nf3 Qd5 16.Nfd4 cd4 17.Bd4 Rd8 18.Rg7 Kf8 19.Rh7 Nc6+–) 15.Bg7 Nc6 (15...Kf7 16.Bf8 Bf6 17.Qa8 Kf8 18.Qb8+–) 16.Bf8 (16.Bh6 d4 17.Bg5 Qd5+–) 16...Kf8 (16...Qf8 17.Rg5 Kf7 18.h6+–) 17.Qh8 Kf7 18.Qh7 Kf8 19.Nd6!! Qd6 (19...Qd6 20.Qh8 Double attack (20.Rg5 Deflection)) 20.Rg5 Ne7 21.Qh8 Kf7 22.Rg7 Kf6 23.Rh7 (23.Rg8 Kf7 24.Qg7) 23...Kg5 24.Qg7 Kh4 25.Qe7 (25.Qf6 Kg4 26.Rg7 Ng6 27.Qg6 Kh4 28.Qg5) 25...Qe7+– 26.Re7 Kh5 27.Rc7 1–0. TwelveTeen (2630) – ChrolloL (2665), lichess.org, 2018.

4.Na3 Nf6

5.e3 c6 6.Nf3 d5 7.c4 dc4 8.Nc4 Ra1 9.Qa1 b5 10.Nce5 Bg4 (10...Be6 11.d4=+) 11.Qa2 (11.Ng4 Ng4 12.Bg7 Rg8+=) 11...e6 (better 11...Be6 12.Qa8 Bd5=) 12.Nc6?? (better 12.Nd4 Bb4 13.f3+=) 12...Nc6–+ 13.Bb5 Bf3 14.gf3 Qc7?? (better 14...Qb6 15.Qc4 Kd7–/+) 15.Qa4+– Kd7 16.Bf6 gf6 17.Ke2 Bd6 18.Rc1 Rc8? (18...Ke7 19.Rc6 Qb8 20.f4+–) 19.Bc6?? (better 19.Rc6 Qc6 20.Bc6 Rc6 21.Qh4+–) 19...Ke7+– 20.Rc3 (20.f4 Qb6+–) 20...Qb6 (20...Be5 21.Rc2 Bh2 22.Be4+–) 21.Be4 Rc3 22.dc3 Qb2 23.Qc2 Qb5 24.Bd3 Qh5 25.Bh7 (25.Qa4+=) 25...Qh2 (25...f5!? 26.Bf5 ef5=+ (worse 26...Qf5 27.Qf5 ef5 28.f4+=)) 26.Be4 (26.Bd3!?+–) 26...f5+= 27.Bd3 Qe5 (27...f4!? 28.Qa4 fe3 29.Qa7 Kd8 30.Qa5 Kd7 31.Bb5 Ke7 32.Qa7 Bc7 33.Qc5 Kf6 34.Qd4 Be5 35.Qe3 Qf4+=) 28.f4+– Qc5 29.Qb2 e5 (29...Qd5 30.c4 Qa5 31.Qb7 Kf6 32.Qb3+–) 30.fe5+– Be5 31.Qb4 Qb4 32.cb4 Kd6 (32...f4 33.e4+–) 33.b5 (33.Bf5 Kc6 34.Bd3 Bc3 35.b5 Kc5+–) 33...Kc7 (better 33...f4!?+–) 34.f4+– Bd6 35.Kd2 (35.Bf5!? f6+–) 35...Kb6 (35...Bb4 36.Kc2 Bc5 37.e4+– (worse 37.Bf5 Be3 38.Kd3 Bf4+=)) 36.Be2 (36.Bc4 Bb4 37.Ke2 f6+–) 36...Bc5 (36...Bb4 37.Kd3+–) 37.Kd3 (37.Bh5!?+–) 37...f6+– 38.Kc4 (38.Bh5!?+–) 38...Be3+= 39.Kd5 Bf4 40.Ke6 Be5 41.Kf5 Kc5 42.Bd3 Kb6 43.Be2 Bd4 (43...Kc5 44.Ke6+=) 44.Bd3 Kc5 (44...Be5=) 45.Be4 (45.Ke4 Bc3+=) 45...Kb6 (45...Kb5 46.Kf4=+) 46.Bd5 (46.Bc6 Be5+=) 46...Be5 (46...Kb5 47.Ke4=+) 47.Ke6 (47.Bc6 Kc7+=) 47...Kc5 (47...Kb5 48.Kf5=+) 48.b6 (48.Bc6=) 48...Bb8 (better 48...Kb6 49.Kf5 Kc5=+) 49.b7+– Kb6 (49...f5 50.Bf3+=) 50.Kf5 (50.Kf6 Bg3+–) 50...Kc7 (50...Be5!?+=) 51.Be4 Kd6 52.Bf3 (better 52.Kf6!? Kd7 53.Kf5+–) 52...Ke7+= 53.Be4 Bc7 (53...Kd6 54.Kf6 Kd7 55.Kf5+–) 54.Bf3 Bb8 55.Be4 Bc7 (55...Kd6!?=) 56.Bf3 1–0. alddhsfd (2055) – incheckito (2125), lichess.org, 2021.

5.e3 d6 6.c4 e5 7.Nf3 Be6 8.Be2 Be7 9.d3 0–0 10.e4 (10.0–0 Nc6–/+) 10...Nc6 11.0–0 Bg4 12.h3 Bf3 13.Bf3 Nd4 (13...Qd7 14.Qb3–/+) 14.Bd4=+ ed4 15.Qb3 b6 16.Nb5 Ra1 17.Ra1 c5 18.Ra6 (18.Ra7 Nd7=) 18...Nd7=+ 19.Na3 Attacking the backward pawn on b6 (19.Be2 Ne5=+) 19...Ne5 20.Rb6 (20.Bg4 Ng4 21.hg4 Qc8=+) 20...Nf3–/+ 21.gf3 Bh4 22.Qb5?? (better 22.Rb7–/+) 22...Qg5–+ 23.Kf1 Qd2 (better 23...Qc1 24.Kg2 Qa3–+) 24.Qb2 Qd3 25.Kg2 Qd1 (25...f5!? 26.Rb3 Qd1 27.Rb8–+) 26.Rd6–/+ h5 (26...f5!? 27.e5 g5–/+) 27.Rd5=+ Be7 (27...f5 28.e5 Re8 29.f4–/+ (29.Rc5?? Re6 30.Rc6 Rc6 31.Qb8 Kh7–+)) 28.Rh5 (28.Re5 Ra8 29.Re7 Ra6–+) 28...d3 (better 28...Ra8!? 29.Rf5 Ra6=+) 29.Rd5+= Bf6 30.Qb3?? (better 30.e5 Bg5 31.e6+= (worse 31.Rc5 d2 32.Rd5 Qc1–/+)) 30...Qb3–+ 31.Nb5 Qc4 32.Nd6 Qc2 (better 32...Qd5! 33.ed5 d2 34.Nf5–+) 33.Nf5 d2 34.Ne3 Qa2 35.Kg3 Qd5! 36.Kf4 (36.Nd5 d1Q Decoy; 36.ed5 c4 Passed pawn) 36...d1Q (36...Qg5) 37.Nd5 Qd5! 38.ed5 (38.ed5 Re8 Combination) 38...Bd4 (38...c4 39.Ke3 Rd8 40.Kd2 Rd5 41.Ke3 c3 42.h4 c2 43.f4 c1Q 44.Kf3 Qh1 45.Ke3 Qd1 46.f5 Qd3 47.Kf4 Rd4) 39.d6 (39.Ke4 Rd8 40.f4 Bf6–+) 39...Re8 40.Kf5 Rd8 41.d7 Rd7 42.Kf4 Black now must not overlook the idea c4 42...Re7 43.Kg3 c4 44.f4 c3 45.h4 c2 46.f3 (46.Kg4 c1Q 47.f5 Re4 48.Kg3 Qf4 49.Kh3 Qf2 50.f6 Rh4) 46...c1Q 47.f5 (47.Kh3 Qg1 48.h5 Re2 49.h6 Rh2) 47...Qg1 48.Kf4 (48.Kh3 Re2 49.f6 Qg2) 48…Be3 0–1. alddhsfd (2040) – colidyre (2155), lichess.org, 2021.

5.e3 g6 6.g4 (6.Nf3 Bg7=+) 6...Bg7 7.g5 Nh5 8.Bg7 Ng7 9.Nb5 (9.Nf3 Na6=+) 9...Ra1 10.Qa1 0–0 11.h4 (11.Nf3 d6–/+) 11...c6 (11...d6 12.Qa5 Na6 13.Bg2–/+) 12.Nd4 (12.Qa8 Na6 13.Na7 Qc7–/+) 12...e5 13.Ndf3 d6 14.Bh3 (14.d4 e4 15.Nd2 Re8–/+) 14...Bh3 15.Nh3 Nd7 16.Nh2 (16.d4 f6–/+) 16...Qa8 (16...f5 17.Qc3 Qc7 18.f4–+) 17.Ng4?? (better 17.Qb2–/+) 17…Qa1–+ (17...Qa1 18.Ke2 Qh1 19.Nf6 Nf6 20.gf6 Nf5–+) 0–1. TwelveTeen (2685) – BabaRamdev (2845), lichess.org, 2018.

5.Nb5 Ra1

6.Qa1 Na6 (6...Nc6 7.e4–/+) 7.Qa5 (7.Na7 Nc5=+) 7...e6 (7...b6 8.Qa2–/+) 8.e3 (8.Nf3 b6 9.Qa1 Bb7–/+) 8...Bc5 (8...b6 9.Qa1–/+) 9.Nf3 (9.Bf6 gf6 (9...Qf6?! 10.Nc7 Nc7 11.Qc5 Qa1 12.Ke2 Qa6 13.c4=) 10.Nf3 c6 11.Qd8 Kd8–/+) 9...Bb6 (9...b6 10.Qa4 Bb7 11.Be2=+) 10.Qa3 (10.Qa4 Nc5 11.Qh4 d6=+) 10...d6–/+ 11.Bd3 (11.d4 Bd7=+) 11...0–0 12.Ng5 (12.0–0 e5–/+) 12...h6 (12...e5 13.0–0–/+) 13.h4 (13.Bf6 gf6 (worse 13...Qf6 14.Nh7 Qh4 15.Nf8+=) 14.Nf3 e5=+) 13...Nc5 (13...Bc5 14.Qa1 e5–+ (14...hg5?! 15.hg5 e5 16.gf6+=)) 14.Ke2?? (better 14.Bf6 Qf6 15.Bh7 Kh8 16.d4–/+) 14...e5 (14...hg5 15.Bf6 gf6 16.hg5 fg5 17.Bh7 Kg7 18.d4–+) 15.Nc3 (15.Nh3 Be6 16.Nc3 Nd3 17.cd3 c6–+) 15...Nd3 16.cd3 hg5 17.hg5 Nh7 (17...Nd7 18.g6–+) 18.Qa4 (18.g6 Nf6–+) 18...Qg5 19.Nd5 Qg4 (19...Bc5!? 20.Qh4 Qh4 21.Rh4–+) 20.Qg4 Bg4 21.f3 Be6 22.Ne7 (22.Nb6 cb6 23.d4–+) 22...Kh8 23.g4 g6 24.Nf5 (24.d4 ed4 25.ed4–+) 24...gf5 25.gf5 Bf5 26.f4 (26.Rh5 Bg6 27.Rh4 Ra8–+) 26...Be6 (better 26...f6 27.Bc3–+) 27.fe5 de5 28.d4 (28.Be5 f6 29.Bf4 Rg8–+) 28...f6 (28...ed4 29.Kd3 Rd8 30.Bd4 Kg8 31.Kc3 Bd4 32.ed4–+) 29.d5 (29.de5 Kg7–+) 29...Bd5 30.e4 (30.Rh4 Rg8 31.Rh2 Ra8–+) 30...Bc4 (better 30...Be4!? 31.Rh4 Bd5 32.d4–+) 31.d3 Be6 32.Rg1 (32.Bc3–+) 32...Bg1 33.Be5 Bd4 (33...fe5 34.Kd2 Rf2 35.Kd1 Bb3 36.Kc1 Rg2 37.Kb1 Bd4 38.Kc1 b5 39.Kb1 Rg1) 34.Bd4 Re8 35.Be3 (35.Ke3 b6–+) 35...Kg7 36.Kf3 (36.Kd2 f5 37.Bf4 c6–+) 36...Kf7 (36...Ng5 37.Ke2–+) 37.Kf4 (37.Bf4 Ng5 38.Ke3 c5–+) 37...Ng5 38.d4 Ne4! 39.Ke4 Bd5! 40.Kd3 (40.Kd5 c6 Double attack (40...Re3 Discovered attack; 40...Re3 Pinning; 40...Re3 Deflection; 40...Re3 Clearance)) 40...Re3! 41.Ke3 c5! 42.Kf4 (42.dc5 f5 Passed pawn) 42...cd4 43.Kg3 d3 44.Kf2 Ke6 45.Ke3 Be4! 46.Kd2 (46.Ke4 d2 Passed pawn) 46...Kd5 47.Ke3 Kc4 (47...Kc4 48.Kf2 f5 49.Ke3 b5 50.Kd2 Kd4 51.Ke1 Ke3 52.Kd1 b4 53.Kc1 d2 54.Kd1 Bf3 55.Kc2 d1Q 56.Kb2 Be4 57.Ka2 Qb1) 0–1. TwelveTeen (2690) – Pizza_in_winter (2650), lichess.org, 2018.

6.Qa1 Na6 (6...Nc6 7.e4–/+) 7.e3 e6 8.Nf3 (8.Bf6 Qf6 9.Qf6 gf6=+) 8...Be7–/+ 9.Bd3 (9.Na7 0–0=+) 9...0–0 (9...d6 10.0–0–/+) 10.Ng5 (10.0–0 b6–/+) 10...h6 (10...Nb4 11.0–0–/+) 11.h4 (11.Ne4 Ne4 12.Be4 d5–/+) 11...Nb4–+ (11...hg5 12.hg5 d6 13.gf6 Bf6 14.Bh7 Kh8 15.Qd1+–) 12.Qa3?? (better 12.Nf3–+) 12...Nc2! (12...hg5?! 13.Bf6 gf6 14.Qc3–+) 13.Bc2 Ba3 (13...hg5? 14.Qd3 Ne4 15.Qd4+–) 14.Na3 d6 (worse 14...hg5 15.hg5 d5 16.gf6 gf6 17.d4–+) 15.Nc4 (15.Nf3 e5–+) 15...e5 (15...b5 16.Na3 b4 17.Nb1–+) 16.d4 (16.Na3 b5 17.Nf3 c5–+) 16...ed4 17.Bd4 (17.Nf3 b5 18.Ncd2 de3 19.fe3 Re8–+) 17...Re8 (17...c5 18.Bb2 d5 19.Nd2 hg5 20.hg5–+) 18.Nd2 (18.Nf3 c5 19.Bb2 d5–+) 18...Bg4 (18...hg5 19.hg5 Nd7 20.Rh5–+) 19.Bb3 (19.Ngf3 c5 20.Bc3 b5–+) 19...d5 (19...hg5 20.hg5 Nd7 21.g6–+) 20.0–0 (20.Ngf3 c5! 21.Bc5 Qa5–+) 20...c6 (better 20...hg5 21.hg5 Nh5 22.g6–+) 21.Ngf3 Ne4 22.Ne4 Re4 23.Nh2 Bd7 (better 23...Be2 24.Re1 Qe7 25.Re2 Rd4 26.Nf3–+) 24.f3 (24.Nf3 Re8–+) 24...Re8 (24...Rd4 25.ed4 Qb6 26.Bc2–+) 25.g3 (25.h5 Qa5 26.f4 Qa3–+) 25...Qc7 (25...Qa5 26.Ra1 Qb4 27.Bd5 cd5 28.g4–+) 26.Kf2 (26.f4 c5 27.Be5 Re5 28.fe5 Qe5–+) 26...c5 (better 26...Qa5 27.Rd1 Qa3 28.Bd5 cd5 29.Nf1–+) 27.Rc1 (27.Bc3 d4! 28.ed4 cd4 29.Bd4 Bb5–+) 27...b6 (better 27...Qa5 28.Bc3 Qa3 29.Rb1–+) 28.Bc3 Be6 29.Bc2 (29.Nf1 Qd7–+) 29...Rd8 (29...Qe7 30.Nf1–+) 30.Bd2 (30.Bd3 Ra8–+) 30...d4 (30...b5 31.f4–+) 31.e4 (31.ed4 Qd7 32.Rd1 cd4–+) 31...d3 (31...c4 32.Bd3–+) 32.Bd1 c4 33.Nf1 b5 34.Ne3 Qb6 (34...Qc5 35.f4–+) 35.f4 Rc8 36.Kf3 b4 (36...Qc6 37.f5 Bd7 38.Nd5–+) 37.f5 c3 38.fe6 Qe6 39.Nd5 Kh8 (better 39...f5 40.Kf2–+) 40.Nb4 cd2 (better 40...f5!? 41.e5 Qe5 42.Nd3 Qe4 43.Kf2 Qd3 44.Bc3 Rc3 45.Rc3 Qc3 46.Be2–+) 41.Rc8 Qc8 42.Nd3 Qc3 43.Ke3 g6 44.e5 Kg7 45.Ke2 (45.g4 f5 46.ef6 Kf6–+) 45...Kf8 (45...h5 46.Ke3–+) 46.Ke3 Ke7 47.Be2 (47.Ke2 f6 48.ef6 Kf6–+) 47...Ke6 (better 47...Qc1 48.Ke4–+) 48.Bd1 (48.Ke4–+) 48...Kd5 49.Ke2 Kd4 50.Nf2 Qe3 (50...Qg3 51.Kf1–+) 51.Kf1 Qg3 52.Ke2 (52.e6 fe6 53.h5 gh5 54.Bh5 e5–+) 52...Qe3 (52...Qe5!? 53.Kf3–+) 53.Kf1 Qe1 (53...Qe5 54.Kg2–+) 54.Kg2 Ke5 (54...Qe5 55.h5–+) 55.Nd3 (55.Kf3 Kd4–+) 55...Kd4 56.Nf2 Qe3 (56...f5 57.Bf3 g5 58.hg5 hg5 59.Nd1–+) 57.Bf3 (57.Bc2–+) 57...Qe1 58.Nd1?? (58.Bd1 f5 59.Bb3–+) 58...f5 59.Nf2 g5 60.hg5 hg5 61.Kg3 g4 (61...Ke3 62.Kh2 Qf2 63.Kh1 Qf3 64.Kh2 Qf2 65.Kh3 g4) 62.Bd1–+ Qe3 (better 62...Qg1 63.Kf4 Qf2 64.Kg5–+) 63.Kg2 g3 64.Nh3 f4 65.Bf3 Qf3! 66.Kf3 d1Q 67.Kf4 g2 68.Ng5 Qf1 69.Nf3 Qf3! 70.Kf3 g1Q 71.Ke2 (71.Kf4 Qf2 72.Kg4 Ke5 73.Kh3 Qg1 74.Kh4 Kf4 75.Kh5 Qg5) 71...Qe3 (71...Qg2 72.Ke1 Ke3 73.Kd1 Qd2) 72.Kf1 Qd2 73.Kg1 Ke3 74.Kf1 (74.Kh1 Kf3 75.Kg1 Qg2) 74...Kf3 (74...Qf2) 75.Kg1 Kg3 (75...Qg2) 76.Kf1 Qd1 0–1. TwelveTeen (2365) – penguingim1 (2705), lichess.org, 2017. (=1.a3 a5 2.b4 ab4 3.Bb2 ba3 4.Na3 Nf6)

6.Qa1 c6 (6...Nc6 7.e4–/+) 7.Nc3 (better 7.Qa8!?=) 7...Na6 (7...d5 8.Nf3–/+) 8.Nf3 (8.e4 e5–/+) 8...g6 (8...d5 9.e3–/+) 9.e3 (9.Ne4 Bg7=+) 9...Bg7 (9...Nc5 10.d4 Ne6 11.e4=+) 10.Ba6 (10.Ne4 0–0=+) 10...ba6 11.Ne4 0–0 (11...d5 12.Nf6 ef6 13.0–0=+) 12.Nf6 ef6 13.0–0 d5 (13...Re8 14.Rb1=+) 14.Nd4 (14.Rb1 Re8=+) 14...Qc7 (14...c5 15.Nb3 c4 16.Nc5=+) 15.Qa4 (15.Nb3!?=) 15...c5=+ 16.Nb3 Bb7 (16...Bf5 17.d3 Ra8 18.Qh4–/+) 17.Qa3 (better 17.Ba3!?=) 17...Rc8–/+ 18.Bc3 f5 (18...Bf8 19.Qa4–/+ (19.Bf6? c4 20.Qa2 cb3 21.Qb3 Rb8–+)) 19.Rb1 (19.Bg7!? Kg7 20.Qb2 Kg8 21.Nc5 Qc5 22.Qb7=) 19...Bc3–/+ 20.dc3 f4 (better 20...c4 21.Nd4 Rb8–/+) 21.Nc5? (better 21.ef4 Qd6 22.Nc1=+) 21...Qc5–+ 22.Qc5 Rc5 23.Rb7 fe3 24.fe3 Rc3 25.Rb6 Rc2 (25...a5 26.Ra6 Rc5 27.g4–+) 26.Ra6–/+ Re2 (26...h6 27.h4–/+) 27.Rd6 (27.Ra5 Rd2–/+) 27...Re3 (27...Rd2 28.Kf1–/+) 28.Rd5 Re6 (28...Re2 29.h4–/+) 29.Rd1 (29.Kf2 h5–/+) 29...Kg7 30.Rf1 (30.Kf2 h6–/+) 30...h5 (30...Re2 31.h4–/+) 31.h3 (31.Rf4 g5 32.Rd4 Re2–/+) 31...f5 (31...Re2 32.g3–+) 32.Kh2 (32.Kf2 h4–/+) 32...Kf6 (32...h4 33.Kg1–+) 33.Kg3 (33.h4 Re2–/+) 33...Re3 (33...g5 34.Rd1–+) 34.Kh2 (34.Kf4 Ra3 35.h4 Ra4 36.Kg3 g5 37.hg5 Kg5–+) 34...Ra3 (34...g5 35.Rc1–+) 35.Rf2 (35.h4 g5–/+) 35...g5–+ 36.Rf1 (36.Re2 f4–+) 36...f4 (36...Re3 37.Rc1–+) 37.Rf2 (37.h4 Ra2–+) 37...Kf5 38.Rf1 (38.Rb2 Ke4–+) 38...g4 39.hg4 hg4 40.Rf2?? (better 40.Rd1–+) 40...g3 41.Kg1 gf2 42.Kf2 Kg4 (42...Kg4 43.Ke1 Kg3 44.Kd2 Kg2 45.Ke2 f3 46.Kd2 f2 47.Kc2 f1Q 48.Kb2 Qa1 49.Kc2 Qc3 50.Kd1 Ra1 51.Ke2 Re1) 0–1. TwelveTeen (2495) – Kaskaskia (2560), lichess.org, 2017. (=1.a3 a5 2.b4 ab4 3.Bb2 ba3 4.Na3 Nf6)

6.Qa1 Nc6 7.e3 e6 8.Nf3 Be7 9.Ne5 (9.Be2 0–0=+) 9...0–0–/+ 10.Nf3 (10.Qa8 Nb4 11.Qa4 c6–/+) 10...d6 11.g4 (11.d4!?–/+) 11...e5–+ 12.g5 Ne4 (12...Nd5 13.Qb1–+) 13.h4 Nc5 (13...Bg4 14.Bg2–+) 14.Be2 (14.d4 ed4 15.Nbd4 Ne5–/+) 14...Bf5 15.d3 (15.d4 Ne6–+) 15...Bg6 (15...Nb4 16.Qb1–+) 16.h5–/+ Bf5 17.g6 (17.d4!? Nb4 18.Na3–/+) 17...fg6–+ (17...hg6?! 18.e4 Nb4 19.Na3–/+) 18.hg6 (18.e4 Nb4 19.Qd1 Bd7–+) 18...Bg6 19.Qa2 Bf7 20.Qb1 h6 (better 20...Bd5 21.e4 Be6–+) 21.Nh4?? (better 21.Ba3–+) 21...Bh4 22.d4 (22.Rh2 Be6 23.Kd1 Rf2 24.Rf2 Bf2–+) 22...Bf2! 23.Kf2 (23.Kd1 Ne4 24.Nc3 Ng3–+) 23...Bd5 (better 23...Ba2! 24.Ke1 Bb1 25.dc5 Bc2 26.cd6 cd6–+) 24.Ke1 Bh1 25.dc5 dc5 26.Bc4 (26.Ba1 Qh4 27.Kd2 Rd8 28.Kc3 Nb4 29.Nc7 Nc2 30.Qb3 Kh8 31.Kc2 Be4 32.Kc3 Qe1 33.Kc4 Qa1–+) 26...Kh8 27.Bd3 (27.Na3 Qh4 28.Kd2 Qf2 29.Kc3 Qe3 30.Bd3 Bd5–+) 27...e4 (better 27...Qh4!? 28.Kd2 Rf2 29.Be2 Qb4 30.Nc3–+) 28.Be2 (28.Ke2 Qd5 29.Bg7 Kg7 30.Qg1 Kh7–+) 28...Qh4 29.Kd2 Rd8 30.Kc3 Bf3 31.Bc4 (31.Qf1 Na5 32.Nd4 cd4 33.ed4 e3–+) 31...Qf6 (31...Na5 32.Qg1 Rd1 33.Qd1 Bd1 34.Bc1 Qf6 35.Nd4 cd4 36.ed4–+) 32.Kb3 Na5 33.Ka4 Qa6 34.Nc7 (34.Bg7 Kg7 35.Nc7 Qc4 36.Ka5 Rd6 37.Qb7 Qa2 38.Kb5 Qb2 39.Kc5 Qb7 40.Ne8 Kg6 41.Nd6 Qc7 42.Kd5 Qc2–+) 34...Qc6 (34...Qc4 35.Ka3 Rd3 36.Bc3 Rc3 37.Kb2 Rb3 38.cb3 Qb3 39.Kc1 Qc3 40.Qc2 Nb3 41.Kb1 Qa1) 35.Bb5–+ Qc7 36.Bg7 Qg7 37.Ka5 b6! 38.Kb6 Rb8 39.Ka5 Qa7 40.Ba6 Rb1 41.Ka4 (41.c3 Qb6 42.Ka4 Qa6) 41...Qb6 (41...Qa6) 42.Ka3 (42.Bb5 Qb5 43.Ka3 Qa5) 42…Qa6 0–1. TwelveTeen (2530) – penguingim1 (2865), lichess.org, 2018. (=1.a3 a5 2.b4 ab4 3.Bb2 ba3 4.Na3 Nf6)

5.e3 e6

6.Nf3 Be7 7.Nb5 (7.Be2 Nc6=+) 7...Ra1 8.Qa1 c6 (8...Nc6 9.Be2–/+) 9.Nbd4 (9.Bf6!? gf6 10.Qa8=) 9...0–0 (9...d6–/+) 10.g4 (10.Be2 d6–/+) 10...d5 (10...Ng4 11.Rg1 Nf6 12.Qa7–+) 11.g5–/+ Ne8 12.h4 Nd7 (12...c5 13.Nb5–/+) 13.Rg1 (13.Be2 Bb4–/+) 13...Qc7 (13...Bb4 14.c4–/+) 14.Nb3 (14.h5 Nc5–/+) 14...b6 (14...Bd6 15.Bh3–/+) 15.h5 Bb7 (15...f5 16.Ne5 c5 17.h6 Ne5 18.Be5=) 16.g6 (better 16.h6 g6 17.Bg7=) 16...fg6–/+ 17.hg6 (17.Be2 g5!–/+) 17...h6 (better 17...Rf3!? 18.gh7 Kh7 19.Bg7 Qh2–/+) 18.Ne5–/+ Bf6 (18...Ne5 19.Be5 Bd6 20.f4–/+) 19.Nd3 (19.Nd7 Qd7 20.Bf6 Rf6–/+ (20...gf6?! 21.Qa4=)) 19...Nd6 (19...e5 20.Bh3 e4 21.Bf6 Nef6 22.Nf4–/+) 20.Nd4 (20.Bh3 Nf5 21.Bf6 Rf6 22.Bf5 Rf5–/+) 20...Re8 21.Nf3 (21.Bh3 Nf8–/+) 21...Nc4 (21...Ra8 22.Qb1 Bb2 23.Nb2–/+) 22.Bf6–/+ Nf6 (22...gf6?! 23.Qc3=+) 23.Rh1 (23.Nb2 Ra8 24.Qc1 c5–+) 23...e5–+ 24.Nc1 c5 25.Bc4 (25.Be2 b5–+) 25...dc4 26.Rh3 e4 (26...Qc6 A) 27.Ne5?? Qg2 28.Rh4 Qg1 29.Ke2 Qg5 30.Rc4 Re5–+ (30...Qe5?! 31.Qe5 Re5 32.Nd3–+); B) 27.Qa2 Bc8 28.Qc4 Be6 29.Qf1–+ (29.Ne5 Qa8 30.Qh4 Bh3 31.Qh3 Re5–+)) 27.Ng1 Qd7 (27...Ra8 28.Qb2–+) 28.Rg3 (28.Qc3 b5–+) 28...b5 29.Nce2 b4 30.Qc1 (30.Rh3 Ra8 31.Qb1 Qa4–+) 30...Nd5 (30...Rb8 31.Nf4–+) 31.Nf4 (31.Nh3 Ra8 32.Nhf4 Nf4 33.ef4 Ra2–+) 31...c3 (31...Nf4 32.ef4 Qf5 33.Ne2–+) 32.dc3 (32.Nd5 cd2 (worse 32...Bd5 33.dc3 Bc4 34.cb4–/+) 33.Qd2 Bd5–+) 32...Nc3 33.Nfe2 Ba6 34.Nc3 bc3 35.Qd1 Qd1 36.Kd1 Rd8 37.Ke1 (37.Kc1–+) 37...Bc4 (better 37...Rd2 38.Rg4 Rc2–+) 38.f3 (38.Ne2 Be2 39.Ke2 Rd2 40.Kf1–+) 38...Rb8 39.fe4 Rb1 (better 39...Rb2 40.Rg2 Bd3–+) 40.Kf2 Rc1 41.Kf3 Rc2 42.Ne2 (42.Nh3 Bf1 43.Rg1–+) 42...Be2 43.Kf4 Bd3 (43...Bd1 44.Rh3 Rf2 45.Kg3 Rf3 46.Kg2 Rh3 47.Kh3 c2 48.Kg2 c1Q 49.Kg1 Qe3 50.Kg2 Bf3 51.Kg3 Be4 52.Kg4 Bg2 53.Kf5 Qe4) 44.e5 Rd2 (44...Rf2 45.Rf3 Rf3 46.Kf3–+) 45.e4 (45.Rg1 c2 46.Rc1–+) 45...c2 46.Rd3 Rd3 47.Kf5 (47.Kg4 c1Q 48.Kf5 Qg5 49.Ke6 Qg6 50.Ke7 Qf7) 47...c1Q 48.e6 (48.Ke6 Qc4 49.Kf5 Rf3 50.Kg4 Qe4 51.Kh5 Rf5) 48...Qf1 (48...Qg5) 49.Ke5 (49.Kg4 Qf3 50.Kh4 Qh3) 49…Qf6 0–1. TwelveTeen (2625) – penguingim1, lichess.org, 2018.

6.Nf3 Be7 7.Nb5 (7.Be2 b6=+) 7...Ra1 8.Qa1 c6 (8...Nc6 9.Be2–/+) 9.Nbd4 (9.Bf6!? gf6 10.Qa8=) 9...d5 (9...d6–/+) 10.g4 (10.Be2 Bd6–/+) 10...Nbd7 (better 10...Ng4!? 11.h3 Nf6–+) 11.g5–/+ Ne4 12.h4 e5 (better 12...0–0!?–/+) 13.Nf5= g6 (13...Bf8 14.Be5 f6 15.Bf4=) 14.Ne5 (14.Ne7 Qe7 15.Ne5 Ne5 16.Be5 0–0+=) 14...Ne5 (better 14...gf5 15.Nd7 d4 16.Bd4 Qd7=) 15.Be5+– (15.Ne7 Nf3 (worse 15...Qe7 16.Be5 0–0 17.f3+=) 16.Ke2 A) 16...Qe7 17.Bh8 Bg4 18.Qa8 Qd8 19.Qd8 (19.Qb7?? Nd4 20.Kd3 Nc5 21.Kd4 Nb7–+) 19...Kd8 20.Bg2 Nh4 21.f3 Ng3 22.Kf2 Nh1 23.Bh1+–; B) 16...Bg4 17.Bh8 Nfg5 18.f3 Nf3–+ (18...Bf3?! 19.Ke1 Bh1 20.hg5=+)) 15...Rg8 16.Nh6 Rf8 17.Bg7 Be6 (17...f6 18.Bf8 Kf8 19.Bg2+–) 18.Bf8 (18.d3 Nc5+–) 18...Bf8+– 19.d3 (19.Ng8 Bb4 20.c3 Ba5+–) 19...Bb4+= 20.Ke2 Bg4?? (better 20...Nc3 21.Kf3 d4+=) 21.Ng4+– Nc3 22.Kf3 Qd6 (22...h5 23.gh6 Qc8+–) 23.Nf6 Kd8 (23...Ke7 24.Qa8 Qc7 25.Ng8 Ke6 26.Bh3 f5 27.gf6 Kf7 28.Be6 Ke6 29.Qe8 Kd6+–) 24.Qa8 Kc7 25.Ne8 Kb6 26.Nd6 Bd6 27.Bh3 Bc7 28.Qa1 (28.Ra1 Kc5 29.d4 Kb5 30.Bf1 Ne2 31.Be2 Kb4 32.Qa3) 28...Nb5 29.Rb1 Kc5 30.d4 Kd6 31.c4! dc4 32.Rb5! cb5 (32...cb5 33.Qa3 Mate attack) 33.Qa3 b4 34.Qb4 Kc6 (34...Kd5 35.Qc5) 35.Qc5 1–0. TwelveTeen (2605) – penguingim1, lichess.org, 2018.

6.Nf3 Be7 7.Bd3 (7.Be2 0–0–/+) 7...0–0 8.Rg1 (8.Qe2 d6–/+) 8...d6 9.g4 e5 10.g5 Nfd7 11.h4 (11.Bf5 g6 12.Bd7 Nd7–/+) 11...Nc5–+ 12.Be2 Nc6 13.h5 (13.Nb5 Na4 14.Qc1 Be6–+) 13...Be6 (13...Na4 14.Qb1–+) 14.g6 (14.Nb5 Na4 15.Qc1 e4–+) 14...fg6 15.hg6 h6 16.Nc4 (16.Nb5 Na4 17.Ba3 Nb6–+) 16...Na4 (better 16...Rf3 17.Bf3 Bc4 18.Bc6 bc6 19.d3–+) 17.Ba3?! (17.c3 b5 (worse 17...Nb2 18.Nb2 Ra1 19.Qa1–+) 18.Bc1 e4–+ (18...Bc4?! 19.Bc4 bc4 20.Ra4–+; 18...bc4?! 19.Ra4 Na5 20.Ra3–+)) 17...b5 (better 17...e4 18.Nh2 Bh4–+) 18.Nb2 b4 19.Na4 ba3 (19...Ra4 20.Bb2 Ra1 21.Qa1–+) 20.Nc3 (20.Ra3 e4 21.Bb5–+) 20...Nb4 21.d4 ed4 (21...c6 22.de5 de5 23.Nd2–+) 22.ed4 (22.Nd4 Bf6 23.Ncb5 Bd4 24.Nd4 Qf6–+) 22...Bf6 (22...c5 23.Nb5 Bf5 24.Na3 Ra3 25.Ra3 Nc2 26.Kd2 Na3 27.Qb3 d5 28.Qa3 cd4 29.Qa4–+) 23.Ne4 (23.Nb5 Na2 24.c4 c6–+) 23...Bf5 24.Nfd2?? (24.c3 Be4 25.cb4–+) 24...Bd4 25.c3 Bf2! 26.Nf2 (26.Kf2 Qh4 Double attack; 26.Nf2 Nc2 Double attack) 26...Nc2 27.Kf1 (27.Qc2 Bc2 28.Rg4 d5–+) 27...Bh3 28.Rg2 Ne3 29.Kg1 Nd1 30.Rd1 (30.Nh3 Nc3 31.Bf1 Qf6–+) 30...Bg2 31.Kg2 a2 0–1. TwelveTeen (2640) – Arstan23 (2575), lichess.org, 2018.

6.Nf3 Be7 7.Rg1 (7.Be2 Nc6=+) 7...0–0 8.g4 (8.Nb5 Ra1 9.Qa1 d6–/+) 8...d5 9.g5 (9.Nb5 Na6–/+) 9...Nfd7 (9...Ne4 10.h4–/+) 10.h4 Nc6 11.Nb5 Ra1 (11...Ra6 12.Nbd4 Rb6 13.Nc6 bc6 14.Ra2–/+) 12.Qa1 e5 13.Ne5 Nde5 14.Be5 Ne5 15.Qe5 c6 16.Nd4?? (better 16.Na7 Be6 17.h5–/+) 16...Bd6–+ 17.Nc6 bc6 (17...Be5?! 18.Nd8 Rd8 19.d4–+) 18.Qc3 Bd7 (18...c5 19.h5–+) 19.Bd3 (19.h5 f6 20.gf6 Rf6–+) 19...Qe7 (19...Qc7 20.Qa1–+) 20.h5 White intends g6 (20.Qf6 Qe6 21.Qe6 fe6–+) 20...Ra8 (20...Rb8 21.Qa1–+) 21.Ke2 (21.Be2 Ra2–+) 21...Bb4 (better 21...c5 22.h6 Be5 23.Bh7 Kh7 24.Qd3 g6 25.Qd5–+) 22.Qd4 c5?? (better 22...Bc5 23.Qb2 d4–+) 23.Qd5–/+ Rd8 (better 23...Re8–/+) 24.g6?? (24.Qe4 Qe4 25.Be4 Bd2 26.Kd2 Bc6 27.Bd3 c4=+) 24...Be6 (better 24...Bg4! 25.Rg4 Rd5 26.gh7 Kh8–+) 25.gh7–/+ Kh8 26.Qe4?? (26.Qg2 f5 27.c3 Qd7=+) 26...Qf6 (better 26...c4!? 27.h6 cd3 28.cd3–+) 27.Qf4? (27.c3 c4! 28.Bc4 Rd2 29.Kd2 Qc3 30.Ke2 Bc4 31.Kf3 Qf6 32.Qf4 Qc6 33.e4 Kh7 34.Qf5 Kg8 35.h6=+) 27...c4! 28.Qf6 (28.Bc4 Rd2 Pinning (28...Rd2 Deflection)) 28...gf6?? (better 28...cd3 29.cd3 gf6–+) 29.Rg8–/+ Rg8 30.hg8Q (30.hg8R Kg8 31.Be4 Bg4 32.f3 Be6=+) 30...Kg8 31.Be4 Kg7 32.f3? (32.Bf3!?=+) 32...Be7 (32...f5 33.Bc6–+) 33.d3 (33.f4 Bg4 34.Ke1 Bh5–+) 33...Kh6 (33...f5 34.Bc6 cd3 35.Kd3–+) 34.dc4 (34.d4!?–/+) 34...Bc4–+ 35.Bd3 (35.Kd2 Bc5–+) 35...Be6 36.f4 (36.Bb5 Kh5 37.Bc6 f5–+) 36...Kh5 (36...f5 37.Bb5–+) 37.f5 Bd5 (37...Bd7 38.Kf3–+) 38.e4 Bc6 39.Ke3 (39.Kf3 Ba4–+) 39...Be8 (better 39...Kg4!? 40.Bc4 Bc5 41.Kd3–+) 40.Kd4 Kg5 41.Bc4 Bd6 (better 41...Bd8–/+) 42.Bf7?? (better 42.Bb3–/+) 42...Be5–+ 43.Kd5 (43.Ke3 Bf7 44.Kf3 Bh5 45.Ke3 Bc7–+) 43…Bf7 (43...Bf7 44.Kc5 Bc3–+) 0–1. TwelveTeen (2705) – Pizza_in_winter (2635), time forfeit, lichess.org, 2018. (=1.a3 a5 2.b4 ab4 3.Bb2 ba3 4.Na3 Nf6)

3.Bb2 e6

4.e3 Nf6–/+ 5.Nf3 ba3 (5...d5 6.Bb5 Bd7 7.Be2–/+) 6.Na3=+ Na6 (6...Be7 7.Be2–/+) 7.Nb5 (7.Be2 Bb4=+) 7...d5 (7...Be7 8.Be2–/+) 8.g4? (better 8.Be5!? Bd6 9.Nd6 cd6 10.Bb5 Bd7 11.Ba6 de5 12.Bb7 Ra1 13.Qa1=+) 8...Ng4–/+ 9.Rg1 Nf6 10.Ne5 (better 10.Be5 Kd7 11.Be2–/+) 10...Bd6?? (10...c6!? 11.Nd4 Qb6–+) 11.Nd6 (better 11.Rg7 Be5 12.Be5+=) 11...cd6–/+ (worse 11...Qd6 12.Rg7 Rf8 13.Qf3+–) 12.Bb5 Kf8 13.Ng4 (better 13.Nd3–/+) 13...Ng4?? (better 13...Ne4 14.d3 Nec5–/+) 14.Bg7+– (14.Qg4?! e5 15.Qg7 Ke7+–) 14...Ke7 15.Qg4 (15.Rg4?! Bd7 16.Bd7 Kd7 17.Bh8 Qh8+–; 15.Bh8?! Qh8 16.Rg4 e5+–) 15...Qc7 (15...e5 16.Qh4 Ke6 17.Qh3 Ke7+–) 16.Qg5 f6 17.Qf6 1–0. TwelveTeen (2685) – Pizza_in_winter (2655), lichess.org, 2018.

4.Nf3 Nf6–/+ 5.e3 Na6 (5...d5 6.Be2–/+) 6.ab4 (6.Bb5 c6 7.Be2 ba3 8.Na3 d5=+) 6...Bb4=+ 7.Nc3 (7.Be2 0–0–/+) 7...0–0–/+ 8.g4 (8.Be2 d5–/+) 8...d5 (8...Ng4 9.Rg1 Nf6 10.Ne4–+) 9.g5 (9.Ne5 Bc3 10.Bc3 Ne4–+) 9...Ne4–+ 10.Ne4 (10.g6 fg6 11.Ne4 de4–+) 10...de4 11.Ne5 Bd6 (better 11...Qg5!? 12.h4 Qe7–+) 12.Ng4 (12.Qh5!?–/+) 12...Bd7 13.Rg1 (13.Bg2 Bc6–+) 13...Nb4 14.Nf6? (better 14.Ra8 Qa8 15.Bg2–+) 14...Kh8 (14...gf6 15.gf6 Kh8–/+) 15.Qh5?? (15.Ra8 Qa8 16.Nd7+=) 15...gf6+– 16.Ra8 Be7?? (16...Qa8 17.Bf6 Kg8+–) 17.Rd8 Bd8 (17...Nc2 18.Kd1 Bd8 19.Qh6 Ne3 20.de3 Ba4 21.Ke2 Rg8 22.Bf6 Bf6 23.Qf6 Rg7 24.Qd8 Rg8 25.Qd4 Rg7 26.Qa4 b5 27.Qa8 Rg8 28.Qa1 e5 29.Qe5 Rg7 30.Bg2 c6 31.Rd1 h5 32.Rd8 Kh7 33.Qf6 Rg5 34.Rh8) 18.gf6 Nd5 (18...Nc2 19.Kd1 Ba4 20.Qh6 Nd4 21.Kc1 Nb3 22.Kb1 Nd2 23.Ka2 Bb3 24.Ka1 Rg8 25.Rg8 Kg8 26.Qg7) 19.Rg7 Bf6 (19...Nf6 20.Bf6 Bf6 21.Qh7) 20.Qh7 1–0. TwelveTeen (2680) – Pizza_in_winter (2660), lichess.org, 2018.

3.Bb2 Nf6

4.e3 (4.ab4 Ra1 5.Ba1 e6=+) 4...b6 (4...ba3 5.Na3 e5 6.Nb5 Ra1 7.Qa1–/+) 5.Nf3 (5.ab4 Ra1 6.Ba1 e6=) 5...Bb7 (5...e6 6.Bb5–/+) 6.Rg1 (better 6.ab4!? Ra1 7.Ba1=) 6...ba3 (6...e6 7.g4 ba3 8.Na3–/+) 7.Na3 e5 (7...e6!?–/+) 8.Ne5=+ Bd6 (8...Be7 9.Nb5=+) 9.Nac4 (9.Nb5 Ra1 10.Qa1 Be7=) 9...Ra1=+ 10.Qa1 0–0?? (10...Be7 11.Be2=+) 11.g4 (11.Nd6 cd6 12.Nc4 Ne8+–) 11...Re8 (better 11...Be7!?=+) 12.g5 (12.Nd6 cd6 13.Nd3+–) 12...Ne4 (12...Nh5 13.Be2 Be5 14.Ne5 g6+–) 13.Ng4+– (13.Nd6 Nd6 14.Ng4 Nf5+– (14...Qg5?? 15.Bg7 Re6 16.Bh6+–)) 13...Bf8 14.h4?? (better 14.Nh6! gh6 15.gh6 Qg5 16.Rg5 Ng5+–) 14...Nc6? (better 14...Re6=) 15.Nh6!+– gh6 16.gh6 Ng3 (16...Bg7 17.Rg7 Kf8 18.Ba3 Nc5 19.Bc5 d6+–) 17.Rg3 (17.fg3?! Re6=) 17...Bg7 (17...Qg5 18.Rg5 Bg7 19.Rg7 Kf8 20.Ba3 d6 21.Qf6 Re3 22.fe3 Ke8 23.Qf7 Kd8 24.Qd7) 18.Bg7 (18.Rg7 Kf8 19.Ba3 d6 20.Rf7 Kf7 21.Qg7 Ke6 22.Bh3 Kd5 23.Qf7 Ke4 24.Bg2) 18...f6 (18...Qh4 19.Be5 Kf8 20.Bd6 cd6 21.Rg8 Ke7 22.Re8 Ke8 23.Nd6 Ke7 24.Nf5 Ke6 25.Nh4 b5+–) 19.Bf6 Kf7 20.Bd8 Rd8 (20...Re5 21.Ne5 Ne5 22.Qe5 Bd5 23.Qe7) 21.Qg7 Ke6 22.Bh3 (22.e4 Rf8 23.Bh3 Rf5 24.Bf5) 22...Kd5 23.d3 (23.Rg5 Ne5 24.Qe5 Kc4 25.Qd4) 23...Kc5+– 24.Rg5 Kb4 25.Qb2 Ka4 26.Qb5 (26.Qb3) 1–0. TwelveTeen (2700) – Pizza_in_winter (2640), lichess.org, 2018.

4.Nf3 (4.ab4 Ra1 5.Ba1 e6=+) 4...e6 (4...ba3 5.Ba3 d6 6.d4–/+) 5.e3 Be7 (5...d5 6.Be2–/+) 6.Bd3 (6.ab4 Ra1 7.Ba1 Bb4–/+) 6...0–0 (6...ba3 7.Na3 0–0 8.0–0–/+) 7.Rg1 (better 7.ab4!? Ra1 8.Ba1 Bb4 9.Ng5=+) 7...ba3–/+ 8.Na3 Na6 9.g4 (9.Qb1 d5–/+) 9...d5 10.Nb5 Bd7 (10...Ne4 11.Nc3 Bf6 12.g5 Bc3 13.dc3–/+) 11.g5 (11.Ne5 Ne4–/+) 11...Ne4–+ 12.Nbd4 (12.h4 c5 13.Nc3 Nc3 14.Bc3 c4–/+) 12...Nb4 (12...c5 13.Ne2–+) 13.Be2 (13.Ra8 Qa8 14.Ne5 Ba4–+) 13...c5 (13...Ra1 14.Ba1 c5 15.Nb3–+) 14.Nb3 Ra1 15.Ba1 c4 16.Nbd4 Qa5 (16...Bg5 17.d3 Bf6 18.de4 de4 19.Nd2=; 16...Ng5?! 17.Ng5 Bg5 18.Qb1–/+) 17.Kf1 (17.Bb2 Bd6 18.c3 Nd3 19.Bd3 cd3–+) 17...Bc5 (17...Bd6!? 18.g6 fg6 19.d3–+) 18.d3 cd3 (18...e5!? 19.Ne5 Bh3 20.Rg2–+) 19.cd3–/+ Nd6 (19...Bd4 20.Nd4 Nc5 21.Bc3–/+) 20.Ne5 (20.Nb3 Qc7=+) 20...Bc8 (20...Ba4 21.Qd2–/+) 21.Bc3 (21.Nb3 Qa7=+) 21...Qa3 (21...Qd8–/+) 22.Bd2 (22.Qb3!? Na2 23.Bb2 Qb3 24.Nb3=+) 22...Bd4–+ 23.ed4 Nc6 (23...Qb2 24.Qc1 Qc1 25.Bc1–+) 24.h4 (24.Nc6 bc6 25.Qc1 Qa4–/+) 24...Nf5 (24...Nd4 25.h5–+) 25.Nf3 (25.Nc6 bc6 26.Rg4–+) 25...Ncd4 (25...Nfd4 26.Nd4 Nd4 27.h5–+) 26.h5 (26.Nd4 Nd4 27.h5 e5–+) 26...Nf3 27.Bf3 (27.Bc1 Nh2 28.Kg2 Qd6–+) 27...Qd3 28.Be2 (28.Qe2 Qa3 29.h6 Rd8–+) 28...Qh3 29.Ke1 Nd4 (29...e5 30.Bb4 Rd8 31.Ba5–+) 30.h6 g6 (30...Qh2 31.Rf1 e5 32.hg7 Kg7 33.Bc3 Ne2 34.Qe2–+) 31.Be3 (better 31.Bb4 e5 32.Bf8 Kf8 33.Qc1–+) 31...Nf5 32.Qa1 f6 (better 32...Qh2 33.Rf1 Qd6–+) 33.Bg4? (33.Bc5 Qh2 34.Rg4–+) 33...Qh2 34.Ke2 Nd4 (34...Ne3!? 35.Ke3 e5 36.Bc8 Qf4 37.Ke2 Rc8 38.Qd1 Qc4 39.Ke1–+) 35.Qd4?? (better 35.Bd4 e5 36.Bc8 Rc8 37.Be3 Qh5 38.Ke1=) 35...Qf4 (better 35...Qg1 36.gf6 Bd7–+) 36.Qf4 (36.Bf4 b6 37.Bd6 Bd7 38.Be6 Be6 39.Bf8 Bg4 40.Kd2 Kf8 41.Qf6 Ke8 42.Re1 Be2 43.Re2 Kd7 44.Re7 Kc8 45.Qf8) 36…e5 (36...e5 37.Qb4 Bg4 38.Rg4 Rf7 39.gf6 Rd7 40.Qb5 Kf7 41.Qd7 Kf8 42.Qe7 Kg8 43.Qe8) 0–1. TwelveTeen (2700) – Pizza_in_winter (2640), time forfeit, lichess.org, 2018.

2.Ba3 ab4=+

3.Bb4 Ra4 4.a3 Na6 (better is 4...Nc6!? 5.Nc3 Ra6=) 5.c3 (5…b5 6.d4–/+; better is 5.Nc3 Rb4 6.ab4 Nb4 7.Ra8+/–). ahmed sharkawy_1 – Ruthless Rook, ChessWorld.net, 2005.

3.Bb4 b6 4.c4 (4.Nf3 Nc6 5.Ba3 Nf6–/+) 4...c5 (better 4...Nc6!? 5.Bc3 Nf6–/+) 5.Bc3=+ Bb7 6.a4 e6 7.Na3 Nf6 8.Nb5 Nc6 9.Qc2 (9.Nf3 Be7=+) 9...Be7–/+ 10.Nf3 0–0 11.d4 (better 11.Qb2!?–/+) 11...cd4–+ 12.Bd2? (better 12.Nfd4 Nd4 13.Bd4 Bb4 14.Bc3–+) 12...e5 13.Bg5 (13.e4 Na7 14.Ne5 Ne4 15.Na7 Ra7–+) 13...d6 (13...h6 14.Bh4–+) 14.g3 (14.Bd2 Na7–+) 14...h6 (better 14...d3!? 15.Qb1 e4 16.Nd2–+) 15.Bf6 Bf6 (15...gf6?! 16.Bh3–/+) 16.Bg2 (16.Qd1 Na5–+) 16...Qe7 (16...d3 17.Qc3 d5 18.e3–+) 17.Kf1 (17.0–0 e4 18.Nd2 d3 19.ed3 Ba1 20.Ra1 Nb4–+) 17...Ra5 (better 17...e4 18.Nh4 d3–+) 18.Qb1 (18.Nd2 Qd7–+) 18...Rfa8 19.Nd2 Ra4 20.Ra4 Ra4 21.Nc3 (21.Qd1 Rb4 22.Ne4–+) 21...dc3 22.Nb3 Rc4 23.Bd5 c2 Black intends e4 24.Qb2 e4 25.Qc1 Rc3 26.e3 Nb4 27.Bb7 Rb3 (27...Rb3 28.Bd5 Rb1–+) 0–1. rhometal – carrafurca, net–chess.com, 2019.

3.Bb4 d6 4.d4 c5 5.dc5 Na6 6.Ba3 Nc5 7.Nf3? (better 7.Bc5 Qa5 8.c3 Qc5 9.e3=) 7...Ra3!–+ 8.Na3 Qa5 A double attack 9.Nd2 Qa3 10.g3 g6 11.Rb1 Nf6 12.Bg2 Bg7 13.0–0 0–0 14.Nb3 Nfe4 15.Qd3 (15.Nc5 Nc5 16.Bd5–+) 15…Nd3 (15...Nd3 16.Be4 Nb4–+) 0–1. ctrotter – marekt, net–chess.com, 2020.

3.Bb4 Nc6

4.Ba3 d5 (4...d6 5.d4=+) 5.Nf3 (5.e3 Nf6=+) 5...Bg4 (5...e5 6.Bf8 Kf8 7.e3=+) 6.h3 (6.e3 Ra5=) 6...Bf3=+ 7.ef3 Qd7 (7...e5 8.Bb2=+) 8.Bb5= 0–0–0 (8...e6!? 9.Bf8 Kf8=) 9.0–0+= e5 (9...e6 10.Bf8 Rf8 11.c4=) 10.Bb2 Bd6 (10...f6 11.c4+=) 11.a4 (11.f4 f6+–) 11...Nge7 12.a5 Qe6 (12...Qf5 13.Re1+=) 13.a6 b6 (13...ba6 14.Ra6 (worse 14.Ba6 Kd7=) 14...Nb8 15.Ra8+=) 14.Re1 Na7 15.Ba4 (15.Bf1 Qf6+–) 15...b5 16.Bb3 c5 (16...Qf5 17.Ba2+–) 17.d4 c4 18.de5 Bc5 19.Bd4 (19.Ba2 Qa6 20.Bd4 Qb6 21.Bc5 Qc5+=) 19...Qb6 (19...Bd4 20.Qd4 Nec6 21.Qb6+–) 20.Bc5 Qc5 21.Ba2 Nec6 Black prepares d4 (21...Kd7!?+–) 22.f4+– d4 (22...h5 23.Nc3 Rh6+–) 23.Nd2 Rhe8 (23...Qd5 24.Qg4 Qd7 25.Qg7+–) 24.Qg4 Kb8 25.Ne4 Qb4 (25...h5 26.Qg7 (26.Nc5?! hg4 27.Reb1 Ka8+–) 26...Qf8 27.Qh7+–) 26.Reb1 Qe7 (26...Qf8 27.Nd6 Rd6 28.ed6+–) 27.Bc4 f5 28.Qf5 g6 29.Qg4 Ne5 (29...b4 30.Ra4+–) 30.fe5 Qe5 31.Ng5 Qc5 (31...Qf5 32.Qg3 Ka8 33.Bd3+–) 32.Qg3 Ka8 33.Ne6 Qc4 (33...Re6 34.Be6 Qd6 35.Qf3 Qc6 36.Qc6 Nc6 37.Rb5 Rd6+–) 34.Nc7 Qc7 35.Qc7 Rb8 36.Re1 Rec8 37.Qf7 Rc2 (37...b4 38.Qd5 Rc6 39.Re7 Rf8 40.Qd7 Rc7 41.Qc7 Rf2 42.Qa7) 38.Re7 Nc6 (38...Rb6 39.Ra7 Kb8 40.Rb7 Ka8 41.Qe8 Rc8 42.Qc8) 39.Rb7 Rc8 (39...Ne7 40.Qe7 Rc1 41.Rc1 Rg8 42.Ra7 Kb8 43.Qc7) 40.Ra7! (40.Ra7 Na7 41.Qb7) 1–0. Pierre – GuestYhqsg, internet, 2020.

4.Ba3 Nf6 5.Nf3 e5 6.Bf8 Kf8 7.Nc3 e4 8.Ng1 d5 9.e3 h5 10.g3 (10.f3 h4=+) 10...h4–/+ 11.Nge2 Ne5 Threatening mate... how? 12.Bg2?? (better 12.Ng1–/+) 12...h3–+ 13.Bf1 (13.Be4 de4 14.Ng1–+) 13…Nf3 0–1. workchess – pcmvr, net–chess.com, 2020.

4.Bc3 e5 5.e3 d5 6.d4 (6.Nf3 Bd6–/+) 6...e4–+ 7.g3 (7.Nh3 Bh3 8.gh3 Nf6–+) 7...Nf6 8.Bg2 h5 9.f3 (9.Nd2 h4–+) 9...h4 10.g4? (10.Nd2–+) 10...h3! 11.Bf1 (11.Nh3 ef3 Passed pawn; 11.Bh3 Bd6 Decoy) 11...ef3 12.Qf3 (12.Nf3 Ne4 13.Bb2 Bb4 14.c3–+) 12...Bg4 13.Qg3 (13.Bb5 Bf3 14.Nf3 Ng4–+) 13...Bd6 14.Qf2 Ne4 15.Qe2 Qh4 16.Kd1 Nf2 17.Kd2 Be2 (17...Be2 18.Be2 Nh1–+) 0–1. stefandima – pcmvr, net–chess.com, 2019.

4.Bc3 e5 5.e3 Nf6 6.Bc4 (better is 6.Nf3!? e4 7.Ne5–/+) 6...d5–+ 7.Bb3 Bc5 8.h3 (8.d4 ed4 9.ed4 Bb6–+) 8...d4 9.ed4 ed4 (9...Bd4?! 10.Nf3–+; 9...Nd4?! 10.Nf3–/+) 10.Bb2 d3 11.cd3 Nb4 (11...0–0!? 12.Ne2 Nb4 13.Bc4–+) 12.Qe2 Be6 13.Na3?? (13.d4 Bd4 14.Bd4 Qd4 15.Nc3–+) 13...Nd3 14.Kf1 0–0 (14...Ra3?! 15.Ba3 Ba3 16.Be6 fe6 17.Qe6 Qe7 18.Qe7 Ke7 19.Nf3–+) 15.Bf6 (15.Be6 Re8 16.Nc4 Re6 17.Ne3–+) 15...Qf6 16.Nf3 (16.Rb1 Nf2 17.Qf3 Nh1 18.Qf6 gf6 19.Nb5 Ng3 20.Ke1–+) 16...Qa1 17.Bd1 Ra3 18.g4 Nf2 (18...Nf4 19.Ne1 Ne2 20.d3 Nf4 21.Rh2 Qd1 22.f3 Bc4 23.Rf2 Ra2 24.Kg1 Rf2 25.dc4 Qe1) 19.Kg2 Bd5 20.Rf1 Bf3 21.Qf3 Rf3 22.Kf3 Qf6 23.Kg2 (23.Kg3 Qd6 24.Kg2 Ne4 25.Rf3 Qd2 26.Be2 Qe2 27.Kh1 Qf3 28.Kh2 Rd8 29.a3 Rd2) 23...Qh4 0–1. grahamtrue (2165) – pcmvr, net–chess.com, 2015.

4.Bc3 e5 5.e4 Nf6–/+ 6.d3 d5 7.Nd2 Bc5 8.h3 (8.Nb3 Ba3–+) 8...Qe7 9.Ngf3 Bb6 10.Be2?? (10.ed5 Qc5 11.d4 Qc3 12.dc6–+) 10...Qc5–+ 11.Bd4 (11.0–0 Qc3 12.ed5 Nd5–+) 11...Nd4 12.Nd4 Qd4 13.0–0 de4 14.Nb3 Qa4 15.de4 0–0 16.Bd3 Ne4 17.Be4 (17.c4 Nc5–+) 17...Qe4 18.Re1 Qh4 19.Qf3 Ra4 20.Re5 Rf4 (20...Rf4 21.Rh5 Bf2 22.Kf1 Qf6 23.Kf2 b6–+) 0–1. ctrotter – pcmvr, net–chess.com, 2020.

2.ba5 Ra5

3.Ba3 Rb5 4.c4 Rb1?? (better is 4...Ra5=) 5.Rb1+– b6 6.c5 Nf6 7.cb6 cb6 8.e3 Ne4 9.Qc2 Bb7 10.Bd3 (10.Qb3!? Nc6+–) 10...Ng5 (10...Nd2 11.Kd2 Bg2+–) 11.Nf3 (better is 11.f3!?+–) 11...Bf3 12.gf3 Nf3 13.Kf1 e6 (better is 13...Nc6+/–) 14.Bh7?? (better is 14.Bf8 Kf8 15.Be2+–) 14...Ba3–+ 15.Be4 Nh2 16.Ke2 Na6 17.Rbg1 (better is 17.Qb3 Nc5 18.Qb6–+) 17...Nc5?? (17...Bf8 18.Rg2 Nb4 19.Qb1=) 18.Bg2?? (18.Rg2!? Ne4 19.Qe4=) 18...Qg5?? (18...d5!? 19.Qc3 Qa8 20.Qg7 Qa6 21.Kd1 Qa4 22.Ke2 Qb5 23.Kd1–+) 19.Ba8? (better is 19.d4=+) 19...Qh5–+ 20.f3 f5 (20...Qe5 21.Be4 Ne4 22.Qe4 Qb5 23.Qd3 Qd3 24.Kd3–+) 21.d4? (better is 21.Rg2!?–/+) 21...d5–+ 22.dc5? (better is 22.Rf1 Ne4 23.Qc7–+) 22...Qf3 23.Kd3 Qe4 24.Kd2 (24.Kc3 Qe3 25.Qd3 Qc5 26.Kd2 Qa5 27.Kc2 Qa8 28.Qb5 Ke7 29.Rg7 Kf6 30.Rg3–+) 24...Nf3 25.Kd1 Rh1 26.Rh1 Qg4 27.Rh8 (27.Bc6 Kf7 28.Qe2–+) 27...Kf7 28.Qe2 Qg1 29.Kc2 Qc1 30.Kb3 Nd2 (better is 30...Bc5 31.Bd5 (31.Qf3?? Qb1 32.Kc3 Bb4 33.Kd4 Qb2 34.Kd3 Qd2) 31...Qb1 32.Kc3 Bb4 33.Kc4 ed5 34.Kb5 Bc5 35.Ka6–+) 31.Ka4 b5! 32.Qb5 (32.Kb5 Decoy to b5 32...Qc5) 32...Qc2 33.Ka5 Nc4 (better is 33...Qc5 34.Ka6 Kf6 35.Qc5 Bc5–+) 34.Ka6=+ Qa2?? (34...Kf6 35.Rf8 Kg5–+) 35.Qd7+– Kf6 36.Qd8 Ke5?? (better is 36...Kg6 37.Qe8 Kf6 38.Qd8 Kg6 39.Qe8 Kf6 40.Qd8=) 37.Kb7 (better is 37.Qc7 Ke4 38.Qf4 Kd3 39.Qd4 Kc2 40.Rh2 Kb1 41.Qd1 Bc1 42.Ra2 Ka2 43.Qc1+–) 37...Qb3 (37...Bc5 38.Kc6 Be3 39.Qb8 Ke4 40.Qb4–+) 38.Kc7 (38.Kc8 Bc5 39.Qc7 Nd6 40.Kd7–+) 38...Bc5 39.Kd7 Nb6 (39...Qa4!? 40.Bc6 Qa7 41.Qc7 Qc7 42.Kc7 Ne3 43.Re8–+) 40.Ke8 Qa4 41.Kf7 Qa7 (41...Qa8? 42.Qc7 Bd6 43.Qc3 Ke4 44.Ra8 Na8 45.Qc6+– (45.Ke6?! Nc7 46.Kf7 Be5+–); 41...Na8?! 42.Qb8 Bd6 43.Qb2 Ke4 44.Ke6–/+; 41...Be3?! 42.Qc7 Ke4 43.Ke6–+) 42.Kg6 Qa1 (better is 42...Na8 43.Qg5 Be3 44.Ra8 Qa8 45.Qe3 Kd6 46.Kg7 Qb7 47.Kg6 Qb2–+) 43.Qc7= Ke4 44.Rh4? (44.Qc5 Qf6 45.Kh7 Qh6 46.Kg8 Qe3 47.Qb4 Ke5 48.Rh1+– (48.Kg7 Na8 49.Qb2 d4 50.Qb8 Ke4+/–)) 44...Kd3–+ 45.Qc5?? (45.Rh3 Qf6 46.Kh7–+) 45...Qf6 (45...Na8?? 46.Rd4 Qd4 47.Qd4 Ke2 48.Qe5+–) 46.Kh7 Qh4 (46...Na8?? 47.Qa3 Qc3 48.Rd4 Kc2 49.Qa2 Qb2 50.Rd2 Kd2 51.Qb2 Ke3 52.Qe5 Kd2 53.Qe6+–) 47.Kg7 Qg5 48.Kf8 (48.Kf7 Qe3 49.Qb5 Kd2 50.Qb2 Ke1 51.Qb1 Kf2 52.Bc6–+) 48...Nd7 49.Ke8 0–1. pinecrest1981 – cheeze12, Live Game Caissa's Web, 2004.

3.Ba3 Nc6 4.Qc1 e5 5.Bf8 Kf8 6.Qb2 Nf6 7.Nf3 Qe7 8.e3 Qb4 9.Qc3? (better is 9.Qc1+=) 9...Ne4–+ 10.Bd3?? (better is 10.Qb4 Nb4 11.Bd3–+) 10…Nc3 (10...Nc3 11.Nc3 d5–+) 0–1. kinderchocolate (2250) – pcmvr (2860), net–chess.com, 2011.

3.Ba3 e6 4.Bf8 Kf8 5.Nc3 Qf6 (5...Nf6 6.e3=) 6.e3 (better is 6.Nf3=) 6...b5 (better is 6...Ne7!?=) 7.Nb5 c6 (7...Ba6!?+/–) 8.Nd6+– Ke7?? (8...Qd8 9.Qf3 Nf6 10.e4+–) 9.Nc4 (better is 9.Nc8 Kf8+–) 9...Rd5 (9...Ra7 10.Rb1 Bb7 11.d4+–) 10.Nf3 (better is 10.Nb6!? Ba6 11.Nd5 cd5 12.Ba6 Na6+–) 10...Ba6 11.Nb6 (better is 11.Rb1 Nh6+–) 11...Rb5? (better is 11...Ra5+–) 12.Bb5 Bb5 13.Nd4 Ba6 14.c3 c5 15.Nb3 c4 16.Nd4 Nc6 17.0–0 Nd4 18.ed4 d5 19.Qa4 Nh6 20.Qd7 Kf8 21.Qd6 (21...Qe7 22.Qb8 Qe8 23.Qa7+–) 1–0. pinecrest1981 – rubber, Live Game Caissa's Web, 2005.

3.Bb2 c5 4.e4 e6 5.a4 Nc6 6.Bb5 Nf6 7.e5 Nd5 8.Nf3 Be7 9.Nc3 0–0 10.0–0 Nc7 11.d3 b6 12.Bc6 dc6 13.Nd2 Nd5 14.Nce4 Ra8 15.Qg4 Ba6 16.Nd6 Nb4 17.Rfc1 Bg5 18.N2e4 (18.f4 Bh6+=) 18...Bh6 (18...Bc1 19.Bc1 Kh8+= (19...Nc2 20.Bh6 g6 21.Nf6 Qf6 22.ef6+–)) 19.f4 Nd5 20.g3 Qe7 (20...Qc7 21.a5 c4 22.dc4+/–) 21.a5+/– ba5 22.c4 Ne3 23.Qe2 Nf5 24.g4 Nd6 25.ed6 Qh4 26.g5 Bg5 27.fg5 (27.Ng5?! Qf4 28.Ne4 Bc8+–) 1–0. marekt – PeterRs, ChessWorld.net, 2015.

3.Bb2 c6 (--> 1.b4 c6 2.Bb2 a5 3.ba5 Ra5).

3.Bb2 f5 4.c4 e5 5.Bc3 Ra7 (5...Ra6 6.e3=+) 6.Be5 Nc6 7.Bf4 Bd6 (better 7...g5!? 8.Be3 Ra5=) 8.Bd6+– cd6 9.Nc3 Ra5 (9...Nf6 10.Nb5 Ra5 11.Nd6 Ke7 12.Nc8 Qc8 13.Nf3+–) 10.Nf3 Nge7 (10...Nf6 11.e3+–) 11.e3+– 0–0 (11...d5 12.cd5 Nd5 13.Nb5+–) 12.Be2 f4 13.0–0 Ng6 (13...Qe8 14.Qb3+–) 14.Qb3 Nce5 (14...Rf7 15.a4+–) 15.Nb5 Qf6 (15...Nf7 16.Nfd4+–) 16.c5 Kh8 (16...d5 17.d4 Nf3 18.Bf3+–) 17.Nd6 (17.cd6?! b6 18.Ne5 Qe5+–) 17...Rc5 (17...Nf3 18.Bf3 Ne5 19.Be4+–) 18.Ne4 Qc6 19.Nc5 Qc5 20.Rac1 Qe7 21.Ne5 Ne5 (21...Qe5 22.d4 Qf6 23.Rc7+–) 22.ef4 Rf4 (22...Nc6 23.Rfe1 Qd6+–) 23.Rc8 Rf8 24.Rf8 Qf8 25.Qb7 (25.Qb7 h6 26.d4+–) 1–0. Heini – chessenemy, internet, 2016.

3.c3 d5 4.d4 Nf6 5.f3? (better 5.Nf3!?–/+) 5...Nc6–+ 6.Bg5 (6.Nd2 e5–+) 6...h6 7.Bf6 ef6 8.h4 (8.Nd2 Ba3 9.Qc2 0–0–+) 8...g6 (better 8...Bd6!? 9.Kf2–+) 9.Nd2 f5 (9...Ba3 10.Nb3 Ra8 11.Qd2–+) 10.Nb3 Ra3 11.f4 Na5 (11...Bd6!? 12.e3–+) 12.Na5–/+ Ra5 13.e3 White intends h5 13...Ra3 14.Ne2 (14.h5 Rc3 15.Kf2 Qd6–/+) 14...Be6 15.h5 g5 (15...Kd7 16.Qd2–+) 16.Qb1 b6 17.g3 gf4 (17...Bd6!?–/+) 18.Nf4 Rc3 (better 18...Qg5 19.Kd2 Be7=+) 19.Ng2?? (better 19.Bb5 c6 20.Kd2+=) 19...Qg5 (19...Qd6 20.a4 c5 21.Bb5 Kd8 22.0–0 cd4 23.a5 Qg3 24.Qe1–+) 20.Kf2 (20.Kd2 Ra3 21.Bb5 Kd8–+) 20...Bd6 (20...Rg8 21.Rh3 f4 22.gf4–+) 21.Nf4 (21.Rh3–+) 21...Bf4 (better 21...Re3! 22.Ke3 Qg3 23.Ke2 Qf4–+) 22.gf4=+ Rg8?? (better 22...Qe7 23.a4 Bc8=+) 23.fg5+– Rg5 24.Rg1 (better 24.Qb2 Rc4 25.Bc4 dc4 26.Qb5 Ke7+–) 24...Rh5 25.Rg8 Ke7 26.Qb4 c5 27.Qc3 (27.Qb6 Rc2 28.Be2 Rh2 29.Kg1 Rh1 30.Kh1 Bd7 31.Rh8 Rc1 32.Rc1 Be8 33.Bb5 Bb5 34.Qd8 Ke6 35.Rh6 f6 36.Rf6) 27...f6 28.Ra8 c4 29.Bg2 (29.Qb4 Kf7 30.Rf8 Kg6 31.Qe7 Rh2 32.Bg2 Kh5 33.Qe6 f4 34.Rh1 fe3 35.Kf3 Rh3 36.Bh3 Kg6 37.Bf5 Kg5 38.Qf6) 29...Rh2 (29...Kf7 30.Qb4 f4 31.Rf8 Kg6 32.Qe7 fe3 33.Ke3 Rh3 34.Bh3 Bg8 35.Rg1 Kh5 36.Bg4 Kh4 37.Qf6) 30.Qb4 Kd7 (30...Kf7 31.Qb6 Rg2 32.Kg2 f4 33.Ra7 Bd7 34.Rd7 Kg6 35.Kf3 c3 36.Qe6 h5 37.Rg1 Kh6 38.Qf6) 31.Qb5 (31.Ra7 Kc6 32.Qc4 Kd6 33.Qc7) 31...Ke7 32.Qb6 (32.Qe8 Kd6 33.Ra7 Rg2 34.Kg2 c3 35.Rb1 b5 36.Rb5 c2 37.Rb6) 32...Bd7 (32...Rg2 33.Kg2 Bd7 34.Qd8 Ke6 35.Ra6 Kf7 36.Rf6 Kg7 37.Qf8 Kh7 38.Rh6) 33.Qc5 (33.Qd8 Ke6 34.Qg8 Ke7 35.Qf8 Ke6 36.Ra6 Bc6 37.Qe8 Kd6 38.Rc6) 33...Kf7 (33...Ke6 34.Qd5 Ke7 35.Ra7 Kf8 36.Rd7 Rg2 37.Kg2 c3 38.Qf7) 34.Kg1 (34.Qf8 Kg6 35.Qg8 Kh5 36.Rh1 Rh1 37.Bf3 Kh4 38.Qg3) 34...Rh5 (34...Rg2 35.Kg2 Ke6 36.Ra6 Kf7 37.Qd5 Kg7 38.Qd7 Kg6 39.Kh3 f4 40.Rg1 Kh5 41.Qf5) 35.Bd5 (35.Qf8 Ke6 36.Ra6 Bc6 37.Qe8 Kd6 38.Rc6) 35...Kg6 (35...Be6 36.Be6 Ke6 37.d5 Kf7 38.Qc7 Kg6 39.Rg8) 36.Rg8 Kh7 37.Qe7 1–0. patrick317 – szech, gameknot.com, 2018.

3.Nc3 c6 4.g3 (4.e4 d5=) 4...b5 (4...d5 5.Bg2=+) 5.Bg2 d5 6.e3 (6.Nf3 Nd7=+) 6...b4 (6...e5 7.Bb2–/+) 7.Nce2 e5 8.Nf3 (8.Bb2 Bd6–/+) 8...e4 (8...Bd6 9.c3 bc3 10.Nc3–/+) 9.Nfd4 Bd7 (9...Nf6 10.Bb2–/+) 10.0–0 g6 (10...Qg5!?=+) 11.Bb2+= f6 12.Qc1 (12.d3 ed3 13.cd3 Bd6+=) 12...c5= 13.Nb3 Ra6 (13...Ra7 14.f3 Bf5 15.a4+=) 14.Nf4 (14.c4 Bc6=) 14...c4 (14...Bb5 15.Rd1 g5 16.Nh3=+) 15.Nd4= Be7?? (better is 15...Qa5=) 16.Nd5+– f5 (16...Bf5 17.Ne7 Ne7+–) 17.Nf5! Bf6 18.Nd4 Bd4 19.Bd4 Nf6 20.Nf6 Kf7 21.Nd7 Nd7 22.Bh8 Qh8 23.Be4 Nc5 24.Bd5 Ke7 25.Bc4 Rd6 26.d4 Ne4 27.Rb1 Rb6 28.a3 Nc3 29.Rb4 Rb4 30.ab4 Qc8 31.Bd3 g5 32.Qa3 Nd5 33.c4 Nf6 34.b5 Kf7 35.Qa7 Nd7 36.c5 Ke6 37.Qa6 Ke7 38.Qc8 (38...Nf8 39.Ra1 Kf6 40.Qf8 Ke6 41.Bf5 Kd5 42.Qf7) 1–0. mroets (2050) – tbear (1680), net–chess.com, 2002.

3.Nc3 d5 4.Nf3 =+.

3.Nc3 g6 4.Nf3 Bg7 5.e4 b5 6.Rb1 c6 7.a4 (7.d4 Na6 (7...Nf6 8.e5 Nd5 9.Nd5 cd5 10.Bb5 0–0) 8.Bd3= (8.a3 Nc7 9.Be2 Nf6 10.Ne5 Bb7) 8...b4 9.Ne2 Nf6 10.c3 c5) 7...Ba6 (better is 7...Bc3!? 8.dc3 Ra4= 9.e5 Na6 10.Be2 Nc5) 8.ab5+/– (8.d4 ba4 9.Bf4 d6 10.Ba6 Na6) 8...Bb5 (8...Bc3!? 9.ba6 Bg7+/– 10.d4 Na6; 8...cb5 9.d4 b4 10.Rb4 Nf6) 9.Nb5+– (worse is 9.Rb5 cb5 10.Nb5 Nc6+=; 9.Bb5?! Bc3 (9...cb5 10.Nb5 Nc6) 10.Bc4 Bg7+/–) 9...Qb6?? (better is 9...cb5 10.Bb5 Nc6+– 1.52/8 (10...Nf6+–)) 10.Nd6! (10.Nd6 ed6 11.Rb6+–) 1–0. pierre – kazaq, internet, 2011.

3.c4 c5 4.Nc3 g6 5.Bb2 Bg7 6.e4 Bd4 (6...d6 7.Rb1=) 7.Nf3+= e5 8.Bd3 Nf6 9.h3 Nh5 10.g3 0–0 11.Nd4 cd4 12.Nb5 Qb6 (12...d6 13.Ba3 Ra6 14.Qf3+=) 13.a4 (13.Ba3!?+/–) 13...d6 14.Ba3 Rd8 15.Be2 (15.Nd6 Na6 16.Rb1 Qc6+/–) 15...Nf6 16.d3 Be6 (16...Na6 17.Rb1+=) 17.Rb1 (17.f4 Bd7+/–) 17...Qc6 18.Bd6 (18.f4 Kg7 19.Bd6 Rd6 20.fe5+/–) 18...Rd6= 19.Nd6 Qd6 20.Rb7 Nbd7 21.Qb3 (better is 21.Bg4!?=+) 21...Nc5–/+ 22.Rb8 Kg7 23.Qb6 Qb6 24.Rb6 Ra4 25.Rb1 Ra3 26.Kd2 (26.Rd1 g5–+) 26...Bd7 27.f4 Nb3?? 28.Ke1 Ba4 29.Kf2 Ra2 30.Rhe1 Nc5–/+ 31.fe5? Nd3–+ 32.Kf1 Ne1 33.ef6=+ Kf6 34.Re1 Bc6 35.Bf3 Ke5–+ 36.h4 Ra3 37.Kf2 Bd7 38.Rd1 Ra2 39.Ke1 h5 40.Rd2 Ra3 41.Ke2 Re3 42.Kf2 Bc6 43.Re2 Re2 44.Ke2 Be4 45.Be4 Ke4 46.Kd2 f5 47.Kc2 d3 48.Kd2 Kd4 49.c5 Kc5 50.Kd3 Kd5 51.Ke3 Ke5 52.Kf3 Kf6 53.Kf4 Ke6 54.Kg5 Kf7 55.Kf4 Kf6 56.Ke3 g5 57.Kf3? gh4–+ 58.gh4 Ke5 59.Kg3 f4 60.Kf3 Kf5 61.Kg2 Kg4 62.Kf2 f3 63.Kg1 Kg3 64.Kh1 Kf2 65.Kh2 Ke2 (66.Kg3 f2 67.Kf4 f1Q 68.Kg5 Qf3 69.Kg6 Qg4 70.Kh7 Ke3 71.Kh6 Ke4 72.Kh7 Kf5 73.Kh8 Kf6 74.Kh7 Qg7) 0–1. alaamattar (2170) – pwillows (2025), net–chess.com, 2006.

3.c4 e5 4.Nc3 =+.

3.d3 Ra8 4.Nd2 (4.Nf3 d5=) 4...e5 (4...d5 5.Ngf3=+) 5.a3 (5.Ngf3 Nc6=) 5...d5=+ 6.Bb2 (6.Ngf3 Nc6=+) 6...Nc6 7.h3 (7.Ngf3 d4=+) 7...Nf6–/+ 8.g4 (8.Ngf3 Bd6–/+) 8...h6 (8...d4 9.Ngf3–/+) 9.Bg2=+ Bc5 10.e3 Qe7 (10...0–0 11.c4=+) 11.Nb3 (11.c4!? Be6 12.Qb3=+) 11...Ba3–/+ 12.Ba3 Ra3 13.Ra3 Qa3 14.Ne2 Qb4 (14...0–0 15.f4–/+) 15.Nd2 (15.Qd2 Qd6–/+) 15...0–0 16.Ng3 (16.c3 Qe7–/+) 16...e4 17.de4 de4 18.Nge4 Ne4 19.Be4 Rd8 20.Bc6 bc6 21.f4? (21.Qc1!?=+) 21...c5 (better 21...Qc3!? 22.Rf1 Qe3 23.Qe2 Qh3–+) 22.Rh2 (22.Rg1–/+) 22...Ba6 Black plans c4 (better 22...Qc3 23.Qe2 Bb7–+) 23.Re2?? (better 23.Qa1 Bb7 24.Qe5=) 23...Be2–+ 24.Qe2 c4 (better 24...Qc3–+) 25.Qc4 (25.f5–+) 25...Qa3 (25...Qd2 26.Kf1 Qd1 27.Kf2 Rd2 28.Kg3 Qg1 29.Kh4 Qe1 30.Kh5 g6 31.Kh6 Qh4) 26.Qc7?? (better 26.Nb3–+) 26...Qc1 27.Kf2 Qd2 (27...Rd2 28.Kf3 Qh1 29.Kg3 Qh2 30.Kh4 Qf2 31.Kh5 g6 32.Kh6 Qh4) 28.Kf3–+ Qd5 (28...Qd1 29.Kg3–+) 29.e4 (29.Kg3 Re8 30.Qc3 Qe4–+) 29...Qd7 (better 29...Qd1 30.Kg3–+) 30.Qd7 Rd7 31.Ke3 Kf8 32.c4 Ke7 33.e5 Kd8 (33...Rd1 34.h4–+) 34.Ke4 Kc7 35.f5 (35.g5 hg5 36.fg5 Kc6–+) 35...Kc6 (better 35...Rd1 36.e6 fe6 37.fe6–+) 36.h4 (36.e6 fe6 37.fe6 Re7–+) 36...Kc5 37.e6 fe6 (37...Rd4 38.Ke3 fe6 39.fe6–+) 38.fe6 Rd4 39.Ke5 (39.Kf5 Kd6 40.c5 Kd5 41.h5–+) 39...Rd8 (39...Rg4 40.Kf5 Rh4–+ (40...Rc4?! 41.e7 g6 42.Kg6=)) 40.e7= Re8 (40...Rb8!? 41.Ke6 Kc4=) 41.Ke6+= Kc6 42.Kf7?? (42.c5 Rc8 43.Kf7+–) 42...Kd7–+ 43.Kg7 h5 44.gh5 Re7 45.Kf6 Re4 (better 45...Ke8–+) 46.h6–/+ Rh4 (46...Rc4?! 47.h7 Rh4 48.Kg7=) 47.Kg7?? (47.Kg5 Rh2 48.Kg6–+) 47...Ke7–+ 48.h7 Rg4 49.Kh6 Kf7 50.h8Q Rh4 51.Kg5 Rh8 52.Kf5 Re8 53.c5 Re1 54.c6 Ke7 55.c7 Kd7 56.c8Q Kc8 57.Kf4 Kd7 58.Kf3 Kd6 59.Kf2 Re4 60.Kf3 (60.Kg2 Ke5 61.Kg3 Rf4 62.Kh3 Kf6 63.Kg2 Kg5 64.Kg3 Rf5 65.Kh3 Kf4 66.Kg2 Kg4 67.Kh2 Kf3 68.Kg1 Rh5 69.Kf1 Rh1) 60...Ke5 61.Kg3 Rf4 62.Kh3 Kf5 (62...Ke4 63.Kg2 Rf3 64.Kh2 Ke3 65.Kg2 Kf4 66.Kh2 Rf2 67.Kh1 Kg4 68.Kg1 Kg3 69.Kh1 Rf1) 63.Kg3 Kg5 64.Kh3 Rf3 (64...Rg4 65.Kh2 Kh4 66.Kh1 Kg3 67.Kg1 Rf4 68.Kh1 Rf1) 65.Kg2 (65.Kh2 Kg4 66.Kg2 Rf4 67.Kh2 Kf3 68.Kh3 Kf2 69.Kh2 Rh4) 65...Kg4 66.Kh2 Rf2 67.Kg1 (67.Kh1 Kf4 68.Kg1 Kg3 69.Kh1 Rf1) 67...Kg3 68.Kh1 Rf1 0–1. adabriwala – mehditayebi (1790), lichess.org, 2019.

3.d3 c6 4.Nd2 (4.e4 e5=) 4...d5 5.Nb3 (5.Ngf3 Nf6=) 5...Ra8 6.Bb2 Nd7 7.h3 (7.Nf3 Qc7=) 7...e5=+ 8.g4 (8.Nf3 Bd6=+) 8...Ngf6 (8...h5 9.gh5 Ngf6 10.Nf3 Rh5 11.Rg1–/+) 9.Bg2 (9.Nf3 Bd6=+) 9...h6 (9...Bd6 10.Nf3–/+) 10.e3 (10.Nf3 Bb4 11.c3 Bd6=+) 10...Be7 (10...Bb4 11.c3 Bd6 12.Ne2–/+) 11.a3 (11.Nf3 Qc7=+) 11...0–0 (11...Bd6 12.c4–/+) 12.Qd2 (12.h4 Nb6 13.g5 Ng4=+) 12...Re8 13.Nf3 Bc5 (better 13...e4!? 14.Nfd4 Nb6–/+) 14.g5 (14.Nc5 Nc5 15.Be5 Nfd7+=) 14...hg5= 15.Ng5 (15.Nc5 Nc5 16.Be5 Nfd7=) 15...Nh7 (15...b5 16.Rg1=+) 16.Nh7= (16.Nc5 Qg5 (16...Nc5?! 17.Nf3=; 16...Ng5?! 17.Nd7 Bd7 18.h4=) 17.Nd7 Qg2–+ (17...Bd7?! 18.Bf3=+)) 16...Kh7 17.0–0–0? (better 17.Rg1=) 17...Ba3–+ 18.Qc3 (18.Ba3 Ra3 19.Rdg1 Qh4–+) 18...Bb2 (18...Bd6 19.Rdg1–+) 19.Qb2 Nb6 20.f4 (20.Nc5 Qh4 21.Rdf1 Na4 22.Na4 Ra4–+) 20...ef4 (20...Na4 21.Qa1–+) 21.ef4 Na4 (21...Qc7 22.Rdf1–+) 22.Qd4 Bf5 (22...Qh4 23.Rhg1 g6 24.Rdf1–+) 23.Rhg1 Qb6 (better 23...Bg6–/+) 24.Qa1?? (better 24.Bd5 f6 25.Be4 Be4 26.de4 Qd4 27.Rd4=+) 24...Nc5–+ 25.Qb2 Nb3 26.cb3 (26.Qb3 Qd4 27.Kd2 Qe3 28.Kc3 Qc5 29.Kd2–+) 26...Bd3 (26...Re2 27.Qe2 Ra1 28.Kd2 Ra2 29.Kc1 Qc5 30.Kb1 Re2 31.Rd2 Bd3 32.Rc2 Qc2 33.Ka1 Qc3) 27.Bd5?? (27.Be4 g6 28.Bd3 Qe3 29.Kb1 Qf4 30.Rdf1+–) 27...Qc5 (27...Qe3 28.Rd2 Qg1 29.Rd1 Qe3 30.Rd2 Qf4 31.Be6 Re6 32.Qc2 Re1 33.Kb2 Qf6 34.Qc3 Rb1) 28.Bc4 g6 (better 28...Qe3 29.Rd2 Qg1 30.Rd1 Qe3 31.Rd2 Bc4 32.Qc2 g6–+) 29.Rg5? (better 29.Rg4 Qe3 30.Rd2 Qe1 31.Rd1 Bc4 32.bc4 Qe3 33.Rd2–+) 29...Bc4 (better 29...Bf5 30.Rf5 Qf5–+ (30...gf5?! 31.Qf6 Qa3 32.Qb2–+)) 30.Rc5+– Re2 31.Qc3 (31.Qf6 Bd5 32.f5 Rg2 33.Rdd5 cd5 34.fg6 Rg6 35.Qf7 Rg7 36.Qd5 Rf8 37.Qe4 Kg8 38.Qe6 Rff7+–) 31...Bb3 32.Ra5 (32.Ra5 Ra5 33.Qa5 Bd1 34.Kd1+–; 32.Qb3?! Ra1 33.Qb1 Rb1 34.Kb1 Re7+–) 1–0. adabriwala – Mathiyazhaganchess (1720), lichess.org, 2019.

3.d3 Nc6 4.Bd2 Ra8 5.Nf3 g6 (5...e5 6.e4=+) 6.Bc3 Nf6 7.Nbd2 Bg7 8.a4 (8.e4 0–0=) 8...0–0=+ 9.a5 Nd5 10.Bg7 Kg7 11.Nc4 (11.Nb3 d6=) 11...d6 12.e4 Nf4 (12...Nf6 13.Be2=+) 13.Qd2 e5 14.Nd4?? (14.g3 Ne6 15.Bg2=+) 14...Be6 (14...Nd4 15.Qd1–+) 15.Qc3?? (better 15.Nc6 bc6 16.Qc3=) 15...Ne2 (better 15...ed4 16.Qd2 Bc4 17.Qf4 Be6–+) 16.Ne2 (better 16.Ne6 fe6 17.Be2+– (17.Ke2?! Nd4 18.Ke1 Qh4+–)) 16...Bh3?? (16...Bc4 17.dc4 f5 18.ef5 Rf5 19.Ng3+–) 17.Ng1 (17.gh3 Qf6+–) 17...Kg8 (17...Be6+–) 18.Be2 (18.Nh3 d5 19.Ne5 Ne5 20.Qe5 de4+–) 18...h6?? (better 18...Bg2 19.Bf3 Bh1 20.Bh1 Ra7=) 19.0–0–0 (19.Nh3!? Nd4+–) 19...Re8?? (better 19...Bg2 20.Bf3 Bh1 21.Bh1 Qg5 22.Kb1 Qh4–/+) 20.g4 (better 20.Nh3 Nd4 21.Kd2+–) 20…Kh7?? (20...Kh7 21.Nh3 Qh4+–; better 20...Bg2 21.Nf3 Qf6=) 0–1. aravind555 – joeljj97, lichess.org, 2018.

3.d3 d5 4.Bd2 Rc5 (4...Ra8 5.Nf3=+) 5.Nf3 (5.d4 Rc6=) 5...f6 (5...Nd7 6.d4 Rc6 7.e3=) 6.e3 Qd6 (better is 6...Rc6!?+=) 7.Bb4+/– Na6 (7...e5 8.d4 ed4 9.Nd4+–) 8.Bc5+– Nc5 9.Nc3 (9.d4 Ne4+–) 9...c6 (9...e5 10.Rb1+/–) 10.Be2 (10.d4 Nd7+–) 10...Nh6 (10...e5 11.d4 Ne6 12.de5 fe5 13.0–0+/–) 11.0–0 Bg4 (11...e5 12.a4+–) 12.Rb1 (12.d4 Nd7+–) 12...Bf3 (12...b5 13.d4 Nd7 14.Nd2 Be2 15.Qe2+–) 13.Bf3 g6 14.d4 Ne6 15.Rb7 Qa3 (15...Bg7 16.a4+–) 16.Rb8 (16.Qd3 Qd6+–) 16...Kf7 17.Qd2 (17.Qd3 Ng5 18.Be2 Qd6+–) 17...Qa7 18.Rfb1 Bg7 19.R8b7 Qa8 (19...Qa3 20.e4 f5 21.R1b3+–) 20.g4 (better is 20.Nd5!? cd5 21.Bd5 Rd8+–) 20...Rb8 (20...Qa3+–) 21.Rb8 (21…Qa3 22.e4+–) 1–0. y – Calrisian, Live Game Caissa's Web, 2004.

3.d4 c5 4.d5 g6 5.Bb2 f6 6.a4 Bg7 7.Nf3 d6 8.Bc3 Ra8 9.e3 Bd7 Attacking the isolated pawn on a4 10.Nbd2 Kf7 11.Qb1 Ra7 12.Bb5 Bf5 13.e4 Bd7 14.0–0 Na6 15.Qb2 h6 16.Bd7 Qd7 17.Nc4 Rh7 18.h3 e6? (better is 18...Qc7+–) 19.Rfd1 e5 (19...ed5 20.Rd5 Kf8+–) 20.Qb6 Ra8 21.Nd6 Kf8 22.Nb7 Ne7 23.Qb5 White prepares d6 23...Kf7 24.Qd7 Bf8 25.Ne5! fe5 26.Qe6 Ke8 27.d6 Nb4 28.d7 1–0. pierred (2765) – grahamtrue (2125), net–chess.com, 2011.

3.e3 b6 4.Nf3 Ba6 5.Be2 Nf6 6.0–0 d5 7.d3 e6 (7...Bb7 8.Bb2=) 8.Bd2+= Rc5 9.d4 Rc6 (9...Be2 10.Qe2 Rc2 11.Qd3+=) 10.Ba6 (10.Ne5 Be2 11.Qe2 Rc2+–) 10...Na6 11.Ne5 Rd6 12.Qe2 (12.c4 Nd7 13.Qa4+=) 12...Nb8 (12...Qa8 13.a4+=) 13.c4 (better 13.Bb4!?+–) 13...c5 14.cd5 Rd5 (14...ed5 15.Qb5 Nbd7 16.a4+=) 15.Qb5 (15.Nc3 Rd6 16.Nb5 Rd5+–) 15...Nbd7 (better 15...Nfd7 16.Nc3 Rd6+–) 16.Nc6?? (better 16.Nc3+–) 16...Qc7 17.Nc3 (17.Qa4 Bd6 18.f4 0–0=) 17...Rh5 (better 17...Rd6!? 18.Ne5 cd4 19.Nd7 Nd7–/+ (19...Rd7?! 20.ed4 Bd6 21.Rac1=)) 18.Ne5= Bd6 19.g3? (19.f4 0–0= (worse 19...Be5 20.de5 Nd5 21.Qe2+–)) 19...0–0 (better 19...cd4!? 20.ed4 Be5 21.de5 Qe5 22.Qe5 Re5–/+) 20.Nd7= Nd7 21.Ne4 f5 (21...Rc8 22.Rfd1=+) 22.Nd6= Qd6 23.Rfd1 g5? (better 23...f4 24.gf4 Rd5=) 24.dc5+– bc5?? (better 24...Nc5 25.Ba5 Qb8+–) 25.Bc3+– Qe5 (25...Rb8 26.Qe2 Qe7 27.Qh5 Ra8+–) 26.Be5 (26.Rd7?! Qc3 27.Rad1 g4+–) 26...Ne5 27.Kg2 g4 28.Qc5 Nf3 29.Rh1 (29.h4 Re8+–) 29...Rh6 (29...Rh3 30.a4+–) 30.Rad1 (30.h3 Rg6+–) 30...Rhf6 (30...Ng5 31.Qe7 Rg6 32.Rd8 Rd8 33.Qd8 Kg7 34.Rc1+–) 31.Rd7 (better 31.h3 R8f7+–) 31...h5 (31...Ng5 32.a4+–) 32.Qc7 (better 32.h3 R8f7+–) 32...Rg6 (32...R6f7 33.h3 Ne5 34.Rf7 Nf7 35.hg4 fg4 36.Qe7+–) 33.a4 (33.Rb1 Nh4 34.gh4 g3 35.Rb8 gh2 36.Kh2 Rg2 37.Kg2 e5 38.Rf8 Kf8 39.Qd8) 33...Ng5 34.a5 e5 35.a6 Ne6 36.Qc4 (36.Qe5!? Ng7+–) 36...Rf7 37.Rf7 Kf7 38.a7 Rg8 39.Qb5 (better 39.Rb1 Re8+–) 39...Kf6 40.Qb7 f4 41.ef4 ef4 42.a8Q (42.Re1!? f3 43.Kf1 Re8+–) 42...Ra8 43.Qa8 f3 44.Kf1 Ke5 45.Qa5 Ke4 46.Qh5 (46.Qh5 Nd4 47.Qg4 Ke5 48.h4+–) 1–0. e4_e5_f4 (1745) – tomazelli (1770), lichess.org, 2020.

3.e3 c6 4.Bb2 (--> 1.b4 c6 2.Bb2 a5 3.ba5 Ra5 4.e3).

3.e3 Nf6 4.Bb2 e6 5.Be2 Be7 6.Bc3 Ra8 7.Nf3 0–0 8.Bd3 d5 9.0–0 b6 10.Bb5 c6 11.Be2 Ba6 12.d3 b5 13.a4 b4 14.Bb2 c5 15.Nbd2 Nc6 16.Qc1 Na5 17.Ne5 Nd7 18.Nb3 Ne5 19.Be5 Nb3 20.cb3 Rc8 (20...Qa5 21.Qb2 f6 22.Bg3=) 21.Rd1 Bf6 22.Qb2 Be5 23.Qe5 Qd7 24.Rac1 f6 25.Qh5 g6 26.Qh3 Kg7 27.Bg4 f5 28.Be2 c4 (better 28...e5=) 29.dc4+– Qe7 30.Rd4 (30.Qg3 dc4 31.Qe5 Kg8 32.bc4 Rc5+–) 30...dc4 31.Bc4 Bc4 32.Rdc4 Rc4 33.Rc4 (33.bc4?! Ra8+=) 33...Rd8 34.Rc1 (34.Qf3 e5+–) 34...Qd6 (better 34...Rd3!?=) 35.g4+– Qd2 36.Rc4 Qd1 37.Kg2 Qd5 (37...Qb3 38.Rc7 Kf8 39.Qh7 Qd5 40.f3 Qd2 41.Kg3 Qe1 42.Kf4 e5 43.Kg5 Qe3 44.Kg6 Rd6 45.Kh5 Rh6 46.Qh6 Qh6 47.Kh6+–) 38.Qf3 Qf3 (38...Qd2 39.Qf4 Qd5 40.e4+–) 39.Kf3 Rb8 40.Rc7 Kh6 41.h4 fg4 42.Kg4 Rb6 (42...Rf8 43.Kg3+–) 43.Re7 Rd6 44.Rb7 Rd2 45.Kf3 e5 46.Rb4 Kh5 (46...Ra2 47.Re4 Ra3 48.Re5 Rb3 49.a5+–) 47.Rb7 (47.a5!? Rd7+–) 47...h6 48.Rb5 (better 48.Rb4 Ra2+–) 48...g5 (48...Kh4 49.Re5 g5 50.Kg2+–) 49.Re5 (49.hg5 hg5 50.Re5 Rb2+–) 49...Rb2 (49...Kh4 50.Kg2 Rb2+–) 50.hg5 hg5 51.Rb5 Kh4 52.Rb4 g4 (52...Kh3 53.Rg4 Rb3 54.Rg5+–) 53.Rg4 Kh3 (53...Kh5 54.b4+–) 54.Rb4 1–0. anotherheaven (1610) – Ziata, lichess.org, 2015.

3.e3 g6 4.Bb2 f6 5.Nf3 Bg7 6.Na3 c6 7.Nc4 Rh5 8.Be2 Rh6 (8...b5 9.Na3=) 9.0–0 (9.Bc3 Na6+/–) 9...Qc7 (better is 9...d5 10.Na3 e5=) 10.Rb1?? (better is 10.e4!?+/–) 10...g5 (10...b5 11.Na3 b4 12.Nc4–/+) 11.g3 d5 12.Na3 g4 13.Ng5 (better is 13.Nh4 b5 14.Bc3=) 13...fg5?? (better is 13...Rg6 14.f4 b5–+) 14.Bg7+– Qd6 15.Rb3 (better is 15.Bg4 Bg4 16.Qg4 e6 17.Rb7 Nd7+–) 15...Rh3 (15...Qg6 16.Bh8 Qh5+–) 16.Bg4 Bg4 17.Qg4 Qd7 18.Qd7 Nd7 19.Bh8 (19.Rb7 Nh6 20.Bh8 g4+–) 19...e5 (19...b5 20.f3+–) 20.Rb7 Nc5 (20...g4 21.Kg2 e4 22.d3+–) 21.Rc7 Ne7 22.Be5 Ne4 (22...Nd7 23.f4+–) 23.d3 (better is 23.f3!? Nd2 24.Rf2 Nc4 25.Nc4 dc4+–) 23...Nd2 24.Kg2 g4 25.Bf6 (25.Rh1 Kd8+–) 25...Nf5 (25...Ng8 26.Rd1 Nf3 27.Bd4 Rh2 28.Kf1+–) 26.Rh1 h5 (26...Nf3 27.e4 de4 28.de4+–) 27.Rc6 Nf3 28.Rc5 Kf7 29.Bd8 Ke8 (29...h4 30.Rd5 Ke6 31.c4 hg3 32.hg3 Rh1 33.Kh1+–) 30.Rd5 N3h4 (30...Nh6+–) 31.Bh4 Nh4 32.gh4 Rh4 33.h3 gh3 34.Rh3 Rg4 35.Kf3 Ra4 36.Nc4 Ra2 37.Rhh5 Rc2 38.Rh8 Kf7 39.Ne5 Ke6 40.Rhd8 Rc1 41.d4 Rh1 42.R5d6 Ke7 43.R8d7 Ke8 (43...Kf8 44.Rf7 Ke8 45.Re6 Kd8 46.Rd7 Kc8 47.Re8) 1–0. Hardin – Flip4, Live Game Caissa's Web, 2004.

3.e4 d5 4.d3 (4.ed5!? Qd5 5.Nc3=) 4...de4=+ 5.Bd2 Re5 6.Qe2 (6.de4 Re4 7.Be2 Nf6=+) 6...Bf5 (better is 6...Nf6 7.f3 e3–/+) 7.Qd1?? (better is 7.f3=+) 7...ed3–+ 8.Be3 dc2 (better is 8...Qd4! 9.c3 Re3 10.fe3 Qe3 11.Ne2 de2 12.Be2–+) 9.Qd8 Kd8 10.Nc3 e6 11.Nf3 Ra5 12.Nd4 Bg6 13.Be2 Ba3 14.0–0 Bb2 15.Rab1 cb1Q 16.Nb1 Ra2 17.Rd1 Nd7 18.Nd2 Ra1 19.h3 Rd1 20.Bd1 Bd4 21.Bd4 Ngf6 22.Ba7 Ke7 23.Ba4 Ra8 24.Bd7 Ra7 25.Be6 Ke6 26.Ne4 Ne4 27.f3 Nd2 28.g4 Nf3 29.Kg2 Be4 30.Kg3 g5 31.Kf2 Ke5 32.Ke3 Ra3 33.Ke2 Kf4 34.Kd1 Ra2 35.Kc1 Ke3 36.Kd1 Ra1 0–1. sburritt – nay (2190), net–chess.com, 2006.

3.Nf3 b6 4.e3 (4.e4 e5=) 4...Bb7 (4...e5 5.Bb2 e4 6.Ne5=) 5.Bb2 (5.d4 Nf6=) 5...Nf6 6.Be2 (6.Bc3 Ra7=) 6...g6 (6...e6 7.0–0=) 7.c4 (7.0–0 Bg7=) 7...Bg7 8.Bc3 (8.d4 0–0=) 8...Ra7 9.Qc2 (9.d4 0–0=) 9...0–0 10.0–0 Nc6 (10...h6 11.d4=) 11.d4 Qa8 (11...Re8 12.d5 Nb8 13.e4=) 12.Nbd2 (12.d5 Nd8+=) 12...d6 (12...Ra3 13.Rfb1+=) 13.Rfd1 (13.d5 Nb8+=) 13...Re8 (13...e6 14.Bd3=) 14.Nb3 (14.e4 Nh5=) 14...Nd7 (14...Ne4 15.Be1=) 15.a4 e5 (15...e6 16.d5 Nce5 17.Ne5 Be5 18.Be5 Ne5 19.Nd4=) 16.d5 Ncb8 (16...Ne7 17.a5+=) 17.a5 Na6 (17...ba5 18.Ra5 Na6 19.Rda1+/–) 18.ab6 cb6 19.h3 (19.Rdb1 Ndc5+/–) 19...Rc8 (19...f5 20.Rdb1+=) 20.Qb2 Rc7 21.Ng5 Bc8 22.Ne4+/– Bf8 23.f3 Nac5+= 24.Nbc5 bc5 25.Ra7 Ra7= 26.Ra1 f5 27.Nd2 Bh6 28.Kf2 Kf7 29.Nb3 Bg5 30.Na5 Nb8 31.Qb6 Be7 (31...Ra6 32.Qc7 Nd7 33.Nc6 Ra1 34.Ba1=) ½–½. Emberger,Rene – Fauland,Peter (2220), Graz op, 2002.

3.Nf3 e6 4.Nc3 b6 5.Bb2 Bb7 (5...Nf6 6.e3 Bb7 7.Bc4 Bc5 8.0–0 0–0 9.Re1 d5 10.Bb5 Qd6+=) 6.e3 Nf6 7.Bd3 (7.Be2 Be7 8.0–0 0–0 9.Nd4 Nc6 10.Nb3 Ra7+=) 7...Bf3 (7...e5 8.Bc4 d5 9.Bb5 c6 10.Be2 Bd6+=) 8.Qf3 Bb4 (8...Nc6 9.Be2 Nb4 10.Kd1 Bc5=) 9.Nb5 (9.a3 Bc5 10.Qg3 Bd6+=) 9...0–0 (9...Na6 10.Qg3 Bf8+=) 10.a3 (10.Bf6 Qf6 11.Qf6 gf6 12.Nc7 d5+/–) 10...Bc5 (10...Be7 11.0–0=) 11.Be5 (11.Bc3 Ra4 12.Bf6 gf6 13.Qg3 Kh8 14.Qc7 Qc7 15.Nc7 Nc6+/–) 11...d6 12.Bc3 e5? (better is 12...Ra4!? 13.Bf6 gf6+=) 13.Ba5+– ba5 14.Qb7 Nd5?? (better is 14...c6 15.Nc3 d5+/–) 15.Qd5+– c6 16.Qe4 f5 17.Qc4 d5 18.Qc5 cb5 19.Bb5 Qg5 20.Qd5 Kh8 21.0–0 f4 22.ef4 Qf4 23.Rae1 h6 24.Re5 Rf7 25.Re8 Rf8 26.Qd8 Re8 27.Qe8 Kh7 28.Bd3 g6 29.Qg6 Kh8 30.Qh7 1–0. pierret@chesscube.com – murxxer@chesscube.com (1605), ChessCube Game, 2011.

3.Bb2 Ra8

4.Nf3 Nf6 5.d3 d6 6.e4 e5 7.Nbd2 Nc6 8.Be2 Be6 9.0–0 Be7 10.Ng5 (10.d4 Nd4 11.Nd4 ed4 12.Bd4 0–0= (worse is 12...Ra2 13.Ra2 Ba2 14.c4+/–)) 10...0–0 11.Ne6 fe6 12.Nc4 d5 (12...b5!? 13.Ne3 Nd4+=) 13.Ne5+= Ne5 14.Be5 de4 15.de4 Ne4 16.Bd3 (16.Bc4!? Bd6 17.Be6 Kh8 18.Qd4 Be5 19.Qe5+/–) 16...Nc5 17.Qg4 Bf6 (17...Rf7!?=) 18.Bh7+/– Kh7 19.Bf6 Qf6 20.Qh5 Kg8 21.Qc5 c6 22.a4 Rfd8 23.Qb6 Rd7 24.Rfd1 (24.Rae1 Ra4 25.Qb3 Qf4 26.Re6 Rf7 27.Re8 Kh7 28.Qh3 Kg6 29.Re6 Rf6 30.Qd3 Kh6 31.Rf6 Qf6+/–) 24...Rad8 (24...Ra4 25.Rac1 Rad4 26.Rd4 Qd4 27.Qb1=) 25.Rf1 Qc3 26.Qb3 Qf6 (better is 26...Qb3!? 27.cb3 Rd2+=) 27.Rae1+– Re8 28.Re2 Kf7 29.Rfe1 Rde7 30.Re3 Kg8 31.Rf3 ½–½. Schalkwijk,Peter – Lauer,Frederic, OP–2011–0–01857, 2011.

3.Bb2 b5

4.a3 e6 5.e3 c6 6.Nf3 (6.c4=) 6...b4 (better is 6...d5!?=) 7.ab4+/– Ra1 8.Ba1 Nf6 9.b5 cb5 10.Bb5 Be7 11.0–0 Ba6 12.Ba6 Na6 13.c4 Nc5 (13...0–0 14.Qe2+/–) 14.Bf6 Bf6 15.d4 Ne4 16.Qc2 Ng5 17.Ng5 Bg5 18.Nd2 0–0 19.Rb1 Qc7 20.Qb2 Be7 21.Qb7 Qb7 22.Rb7 Rd8 23.c5 Kf8 24.Nc4 Ke8 25.Kf1 f5 26.Ke2 g5 27.Nb6 g4 28.f4 h5 29.Ra7 h4 30.Kd3 Bf6 31.e4 fe4 32.Ke4 h3 33.g3 Bg7? (33...Bh8+–) 34.c6! dc6 (34...Bd4 35.cd7 Rd7 36.Ra8 (36.Nd7 Ba7 37.Nf6 Ke7 38.Ng4 Bg1+–) 36...Ke7 37.Nd7+–) 35.Rg7 Kf8 36.Rc7 Re8 (36...Kg8 37.Nd7 Kf7 38.Ne5 Ke8 39.Ng4+–) 37.Nd7 Ke7 38.Ne5 Kd8 39.Ra7 Kc8 40.Ra8 Kc7 41.Re8 Kd6 42.Rc8 Ke7 43.Ra8 Kd6 (43...c5 44.dc5 Kf6 45.c6 Ke7 46.c7 Kd6 47.c8Q Ke7 48.Qd8#) 44.Ra7 c5 45.Rd7# 1–0. Fournier,Frederic (1700) – Nikkola,Jouni, Redhotpawn.com, 2012.

4.e3 b4 5.a3 ba3 6.Na3 e6 7.Nc4 (7.Nf3 Nf6=) 7...Ra1= 8.Qa1 Nf6 9.Nf3 d5 (9...Be7 10.Be2=) 10.Na5 (better 10.Nce5 Bd6 11.Bb5 Bd7 12.Nd7 Nbd7 13.Ne5+–) 10...Bb4?? (better 10...Be7=) 11.Qa4+– Nfd7 12.Qb4 c5 13.Qb5 (13.Qc3 f6+–) 13...0–0 (13...Ba6 14.Qa4 Bf1 15.Rf1+–) 14.Nc6 (14.d3 Ba6 15.Qa4 f6+–) 14...Nc6 15.Qc6 c4 (15...Qa5 16.Kd1+–) 16.Be2 Qe7 (16...Nb8 17.Qb5 Ba6 18.Qc5+–) 17.0–0 Rd8 (17...f6 18.Ra1 Nb8 19.Qb6+–) 18.Qc7 Qb4 (18...Re8 19.Ra1+–) 19.Bc3 (19.Qd8 Qf8 20.Qf8 Nf8+–) 19...Qa3 (19...Qb6 20.Qb6 Nb6+–) 20.Qd8 Qf8 21.Qg5 (21.Qf8 Nf8 22.Ra1 Bb7+–) 21...f6 22.Qg3 (22.Qh4 Qf7+–) 22...e5 23.Ra1 Qc5 24.Nh4 d4 (24...Nf8 25.f4 d4 26.ed4 ed4 27.Qf2+–) 25.Nf5 g6 26.ed4 ed4 27.Bd4 Qf5 28.Qc7 Nf8 29.Bc4 Kh8 (29...Qd5 30.Bd5 Be6 31.Bf6 Nd7 32.Be6 Kf8 33.Qd8) 30.Qf7 Be6 (30...Qf2 31.Kf2 Ne6 32.Qf6 Kg8 33.Qg7) 31.Qf8 (31.Qf8 Bg8 32.Qg8) 1–0. GuestRDMJ – GuestQJZD, freechess.org, 2017.

4.e3 b4 5.Nf3 Nf6 6.Be2 Nc6 7.0–0 (7.a3 e6=) 7...d6 (7...Bb7 8.a3=) 8.a3 ba3 (8...e5 9.ab4 Ra1 10.Ba1 Nb4 11.c4=) 9.Na3 e5 10.Nc4 Ra1 11.Qa1 e4 (11...Be7 12.Qa8 Bd7 13.Qb7=) 12.Nd4 Nd4 13.Bd4 d5 (13...Be7 14.f3+=) 14.Ne5 Bd7 (14...Bd6 15.Bb5 Nd7 16.Ng4+–) 15.Nd7 Nd7 16.Bg7 Rg8 17.Bf8 Nf8 (17...Kf8 18.f3 Nc5 19.fe4 Ne4 20.Qb2+/–) 18.Bb5+– Nd7?? (better is 18...Ke7+–) 19.Qe5 Qe7 20.Bd7 (20.Qc7!? Kf8 21.Bd7 Rg6+–) 20...Kd7 21.Qe7 (better is 21.Qd5 Ke8 22.Qa8 Qd8 23.Qe4 Kf8 24.Rb1+–) 21...Ke7+/– 22.d3 (22.f3 f5+/–) 22...c5 23.de4 de4 24.Rd1 Ke6 25.g3 (better is 25.Kf1+=) 25...c4? (better is 25...Ra8=) 26.Rd4+– h5? (26...Ke5 27.Rc4 Rd8 28.Rc7+–) 27.Rc4 (27.Re4!? Kd5 28.Rd4 Kc5+–) 27...Kf5 (27...f5 28.Rd4+–) 28.Rc5 Kg6 29.c4 f5 30.Rc6 Kf7 31.c5 Ke7 (31...h4 32.Rh6+–) 32.Rh6 Rg5 (32...Rc8+–) 33.h4 Rg4 (33...Rg8 34.Rh5 Ke6 35.Rh6 Ke5 36.c6+–) 34.Rh5 Ke6 (34...Rg7 35.Rf5 Ke6 36.Rg5+–) 35.c6 (35.Rg5 Rg3 36.fg3 Ke7 37.Rf5 Ke6+–) 35...Kd6 (35...Rg7 36.Rh6 Ke5 37.Kg2+–) 36.Rf5 (36.Rg5 Rh4 37.Rg6 Kc7 38.gh4 Kb6 39.h5 Kc7 40.h6 Kb6 41.c7 Ka5 42.c8Q Kb5 43.Qc7 Ka4 44.Rb6 f4 45.Qa7) 36...Kc6 37.Rf4 Rg8 38.Re4 Kd5 39.Rd4 Ke5 (39...Ke6 40.g4+–) 40.Rf4 (40.f4 Ke6 41.Kf2 Rh8+–) 40...Rd8 41.Kg2 Rd2 (41...Rh8 42.Ra4+–) 42.h5 Rd6 43.Rh4 Kf5 (43...Re6 44.f4 Ke4 45.h6+–) 44.g4 Kg5 45.Kg3 Rd1 (45...Kf6 46.f4+–) 46.Rh2 (46.f4!? Kf6+–) 46...Rg1 47.Rg2 Rf1 (47...Re1 48.f4 Kh6 49.Kf3+–) 48.f4 Kf6 (48...Kh6 49.e4+–) 49.g5 Kf5 (49...Kf7 50.f5!+–) 50.h6 (50.g6 Kf6 51.Kh2 Rf3+–) 50...Rh1 (50...Kg6 51.e4 Rd1 52.Rh2+–) 51.Kf3 (better is 51.Rh2 Re1 52.Kf2+–) 51...Rh3 (51...Kg6+–) 52.Rg3 Rh4 53.g6 Rh6 54.g7 Rg6 (54...Rh5 55.g8Q Kf6 56.Qg7 Ke6 57.Rg6 Kf5 58.e4) 55.Rg6+– Kg6 56.g8Q Kf6 57.e4 1–0. Fournier,Frederic – castorscito, Active, 2007.

4.e3 Nc6 5.Nf3 h6 (5...Bb7 6.c4 b4 7.d4=) 6.Be2 d5 7.0–0 e6 8.d3 b4 (8...Nf6 9.c4+=) 9.c3 Nf6 10.cb4 Bb4 11.a3 Be7 (11...Bd6 12.Qc2 Bd7 13.Nbd2+=) 12.Qc2 Bd7 13.Nbd2 0–0 14.Nb3 Ra7 15.Nc5 Na5 (15...Bc5 16.Qc5 Ra5 17.Qc3+–) 16.Nd7 (16.Bd4!? Ra8 17.Ne5+–) 16...Qd7+= 17.Ne5 Qd6 18.a4 Nc6?? (better 18...Rb8+=) 19.Nc6+– (worse 19.Qc6 Ra6 20.Qd6 Bd6+– (20...Rd6?? 21.Ba3+–)) 19...Ra6 20.Ne7 (20.Rfc1 Re8+–) 20...Qe7 21.Rfc1 (21.Ba3 c5+–) 21...Qb4 (21...Rfa8 22.d4 R6a7 23.Ba3+–) 22.Bf6 (22.d4 Raa8+–) 22...gf6 23.Qc7 Ra7 (23...Ra4 24.Ra4 Qa4 25.d4+–) 24.Qc5 White intends a5 (better 24.Qa7 f5 25.Qc7+–) 24...Qb8 (24...Ra4 25.Ra4 Qa4 26.d4+–) 25.a5 Rb7 26.a6 Rb2 27.Rc2 (better 27.Bf3 Rb5 28.Qe7 Kg7+–) 27...Rb5 (27...Qb3 28.Rc3 Qb8 29.Bf1+–) 28.Qc7 (better 28.a7 Rc5 29.ab8Q Rc2+– (29...Rb8?? 30.Rc5 Kg7 31.Bh5+–)) 28...Rb1 29.Rb1 Qb1 30.Bf1 Ra8 (30...Kg7 31.a7 d4 32.Qc8 Rc8 33.Rc8 de3 34.a8Q ef2 35.Kf2 Qb2 36.Kf3+–) 31.a7 (better 31.Qb7 Qc2 32.Qa8 Kg7+–) 31...Ra7 (31...Kg7 32.Qg3 Kf8 33.Qd6 Kg7+–) 32.Qa7 (32.Qd8 Kg7 33.Rc8 Qf1 34.Kf1 Ra1 35.Ke2 f5 36.Qh8 Kg6 37.Rg8 Kh5 38.Qg7 Ra2 39.Kf3 Ra4 40.Qf7 Kh4 41.Qf6 Kh5 42.Qg6 Kh4 43.Qh6) 32...Qc2 33.d4 f5 34.Qb8 Kg7 35.Qb7 (35.g3 Qd1+–) 35...Qc1 (35...f4 36.ef4 Qe4 37.Qb2+–) 36.h4 h5 (36...f4 37.e4 de4 38.Qe4+–) 37.Qe7 Qd1 38.Qg5 Kf8 39.Qh6 Ke7 40.Qg5 Kf8 41.Qd8 Kg7 42.Qa5 (42.g3 Qg4+–) 42...Qg4 (42...f4 43.Qc7 fe3 44.Qg3 Kf8 45.fe3+–) 43.g3 Qf3 44.Qb5 Qe4 (44...Qd1 45.Kg2 Qg4 46.Be2+–) 45.Qe2 (better 45.Be2 f4 46.gf4 Qg6 47.Kf1+–) 45...Kg6 (45...Qg4 46.Qc2+–) 46.Bg2 (better 46.Qd1 Qg4 47.Be2 Qh3 48.Bh5 Kh6 49.Bf7 Kg7+–) 46...Qb1 47.Kh2 Qb8 48.f3 (48.Bf3 Qh8+–) 48...f6 (48...Qb4 49.g4+–) 49.Kh3 e5 (49...Qb3 50.e4 fe4 51.fe4+–) 50.g4 (50.de5 fe5 51.Qa6 Kf7+–) 50...hg4 (50...Qc8 51.gh5 Kh6 52.f4+–) 51.fg4 f4 (51...e4 52.gf5 Kg7 53.Qg4 Kf8 54.Qg6+–) 52.ef4 (better 52.Bd5 Qd6 53.Qa2 Qd8 54.h5 Kg7 55.de5 Qb6 56.ef6 Qf6+–) 52...ef4 (52...Qb3 53.Qf3 Qf3 54.Bf3 ed4 55.Bd5 f5 56.h5 Kg7+–) 53.Qe3 (53.Bd5 Qf8+–) 53...Qb4 (better 53...fe3 54.Bf3 Qb2–+) 54.Qf4+– Qd2 (54...Qc3 55.Kh2 Qc2+–) 55.Qd2 (55.Qd2 Kf7 56.Qe3 Kg8 57.Bd5 Kf8 58.Qe6 Kg7 59.Qf7 Kh6 60.Be4 f5 61.g5) 1–0. e4_e5_f4 (1795) – gmtcbm10 (1855), lichess.org, 2021.

4.e3 e6 5.d4 Nf6 6.Bd3 Nc6 7.a3 Bb7 8.Nf3 b4 9.ab4 Ra1 10.Ba1 Nb4 11.Be2 Be4 12.Na3 Qa8 13.Bb2 Qb7 14.c3 (better is 14.Qc1!?+=) 14...Nc2!–/+ 15.Nc2 Qb2 16.Kd2?? (better is 16.Bd3 Qc3 17.Ke2–/+) 16...Bc2–+ 17.Qc2 Ne4 18.Kd3 (18.Kd1 Nf2 19.Ke1 Qc2 20.Kf2 Qc3 21.Rb1–+) 18...Qb5 19.c4 Nf2 20.Kd2 Bb4 21.Kc1 Ba3 22.Kd2 Qb4 (22...Qb4 23.Qc3 Ne4 24.Kd3 Qc3 25.Ke4 Qc2 26.Kf4 Bd6 27.Ne5 Qe2–+) 0–1. Duke of Wellington – marekt, ChessWorld.net, 2015.

4.e3 Nf6 5.Bc3 Ra4 (5...b4!? 6.Bb4 Ra8+=) 6.Bb5+– Rg4 (6...Bb7!? 7.Nf3 Ra8+–) 7.Bf6+– Rg2?? (better 7...Rb4 8.Nc3 gf6+–) 8.Bc3 (8.Be5 Bb7 9.Nf3 Rg4+–) 8...Bb7 9.Nf3 e6 10.Bd3 (10.a4 Na6+–) 10...f6 (10...Na6 11.Bf1 Rg6 12.Ba6 Ba6 13.d3+–) 11.Kf1 (11.Nh4!? Rg5 12.f4 Rc5+–) 11...Rg4 12.a4 e5 (12...Na6 13.Rg1 Rg1 14.Kg1+–) 13.h3 Bf3 (13...Rg6 14.Bg6 hg6 15.d3+–) 14.Qf3 Rh4 15.a5 d5 (15...Nc6+–) 16.a6 e4 (16...Bc5 17.a7 Ba7 18.Ra7+–) 17.Bb5 c6 (17...Kf7 18.Qg3 Na6 19.Qh4+–) 18.Qg3 f5 19.a7 Bd6 20.Qg7 (better 20.ab8Q Bb8 21.Bc6 Ke7 22.Qg7 Ke6 23.Bd7 Kd6 24.Ra6 Qb6 25.Bb4 Kc7 26.Bb5 Kc8 27.Qd7) 20…Rg8 1–0. DEFFM – GuestCDQY, freechess.org, 2019.

4.e3 Nf6 5.Nf3 c6 (5...Nc6 6.Be2=) 6.c4 b4 (6...bc4 7.Bc4 d5 8.Be2=) 7.d4 c5 (7...e6 8.Qb3+=) 8.a3 e6 9.ab4 Ra1 10.Ba1 cd4 (10...cb4 11.Bd3+=) 11.Bd4 (11.c5 de3 12.fe3 d6 13.Bf6 gf6 14.cd6 Bd6 15.Bb5 Ke7=) 11...Bb4= 12.Nbd2 0–0 (12...Nc6 13.Bb2=) 13.Bd3 (13.Qa1 Be7=) 13...Nc6 14.0–0 d6 (14...Nd4 15.ed4 Qa5 16.Qe2=) 15.Bf6+= Qf6 16.Ne4 (16.Qb1!? Qh6 17.Be4 Bd2 18.Bc6+=) 16...Qe7+= 17.Qc2 (17.Nd4 Nd4 18.ed4 d5 19.cd5 ed5=) 17...f5 18.Ng3 Bc5 19.Qd2 e5 Black prepares the advance f4 (19...Bb7 20.Rb1+=) 20.Be2 (20.Bf5!? Bf5 21.Nf5 Rf5 22.Qd5 Qf7 23.Qc6 Qc4 24.Ng5+=) 20...Be6+= 21.Rb1 g6 (21...Qf6 22.Qd1+=) 22.Qc2 (22.Ra1 Rb8+=) 22...f4 23.ef4 (23.Nf1 fe3 24.Ne3 Nd4 25.Nd4 ed4–/+ (25...Bd4?! 26.Bf3+=)) 23...Rf4 (23...ef4 24.Nf1 Bf5 25.Bd3–+) 24.Ne4 (better is 24.Qa4!? Nd4 25.Nd4 Bd4 26.Bf3=) 24...Bf5 25.Bd3 Nb4 26.Rb4 Bb4 27.Qa4 Be4 (27...Qb7 28.Nf6 Kf7 29.Bf5 gf5 30.Nh7 Rc4 31.Qb3–+) 28.Be4 Re4 (better is 28...Bc5–+) 29.Qa8+= Kg7 30.Qe4 Bc5 (30...Qa7 31.h3+=) 31.g3 (31.Kf1 h6=) 31...Qa7+= 32.Qe2 Qa1 33.Kg2 Qa8 34.Kg1 Qe8 (34...h6 35.Nd2=) 35.Nd2 (35.Ng5 h6 36.Ne4 Qe6=) 35...Qe6 36.Qd3 (36.Ne4 Bd4=) 36...Qf5 Attacks the backward pawn on f2 (36...g5 37.h3=) 37.Qe2 (37.Ne4 Bd4=) 37...Qc2 38.Kf1 Qc1 39.Kg2 Qc2 40.Kf1 ½–½. Labahn,Wolfgang – Huesemann, Espelkamp, 1980.

4.e4 b4 5.Bc4 (5.a3 ba3 6.Na3 Bb7+=) 5...Bb7 6.Qe2 (6.f3 e6 7.Qe2 Nf6=) 6...e6 7.d4 (7.Nf3 Nf6 8.e5 Nd5=) 7...Ba6 (7...d5 8.ed5 Bd5 9.Nf3=+) 8.Nd2 Bc4 (8...Nf6 9.Ba6 Ra6 10.Ngf3=) 9.Nc4 Rg5 (9...Ra4 10.Nf3=) 10.g4 (10.Ne5 Nf6+=) 10...h5 11.Ne3 (better 11.Nf3!? Rg4 12.Nce5+=) 11...hg4=+ 12.Ng4 Rh4 13.f3 f5 (13...Nf6 14.Qf2 Rgg4 15.fg4 Rg4 16.Qf3 Re4 17.Ne2–/+) 14.ef5= Rf5 15.Ne5 (15.a4=) 15...Nc6 (better 15...Bd6!?=+) 16.Nc6+= dc6 17.Qe6 Qe7 18.Qe7 Ne7 19.0–0–0 (19.a4 Ra5+=) 19...c5 (19...Nd5 20.Re1 Kd7 21.Re5=) 20.c3 (20.dc5 Rc5 21.a3 g6=) 20...Nd5= 21.cb4 (21.Re1 Kd7 22.Re5 Rhf4 23.Rf5 Rf5 24.cb4 cb4=+) 21...Nb4 (21...cb4!? 22.Re1 Kd7=+) 22.a3+= Na6 (22...Nc6 23.dc5 Bc5 24.Rd3+=) 23.d5 (23.dc5 Bc5 24.Bg7 Ba3 25.Kb1 Bc5+=) 23...Rc4 (23...c4 24.Kc2+=) 24.Kb1+– g5 (24...Rh4 25.Ka2+–) 25.Ka2 (25.Nh3 Kd7+–) 25...Bd6 26.Kb3 (26.Re1!? Kd7 27.Re4 Re4 28.fe4+=) 26...Rh4= Attacks the backward pawn on h2 27.Rd2 (27.Kc2 c4=) 27...c4 28.Kc2 Nc5 29.Re2 (29.Bc3!?=) 29...Kf7 30.h3 (30.Bc3 Rd5 31.Rg2 Na4=+) 30...Rd5 (30...Nd3 31.a4–/+) 31.Bc3=+ Nb3 32.a4 Nd4 33.Bd4 Rdd4 34.Re3 (34.Rg2 Kf6=+) 34...Rd5 (34...c3 35.Ne2 Rd2 36.Kc3–/+) 35.Ne2=+ Ra5 36.Nc3 Rf5 (36...Bb4 37.Ne4=+) 37.Ne4= Bc5 (37...Kg6 38.Rc3=) 38.Nc5 Rc5 39.Ra3 (39.Re4 Rf5 40.Rh4 gh4+=) 39...Ra5= 40.Kc3 Kf6 (40...c5 41.Rh2=+) 41.Kb4= Ra7 (41...Rf5 42.Rc3=) 42.a5+= Ra6 43.Kb5 Ra7 44.a6 Ke6 45.Rc3 Attacking the isolated pawn on c4 (45.Rc1 Rh3 46.Rc4 Rh1+–) 45...Rf4 (45...Rh6=) 46.Rhc1 (46.Ra1+–) 46...Kd5?? (46...Rf5 47.Kc4 Ra6 48.Re3 Kf6 49.Rce1=+) 47.Rc4?? (47.Re3 Rd4 48.Rg1 Rf4+–) 47...Rf3?? (better 47...Rc4 48.Rc4 Ra6 49.Rc7 Rh6=) 48.Rc7+– Rb3 49.Ka4 Rc7 50.Rc7 Rh3 51.a7 Rh8 52.Kb5 g4 53.Kb6 (53.Rg7 Ra8 54.Kb6 g3+–) 53...g3 (53...Ke5 54.Rc5 Kf4 55.Ra5+–) 54.Rg7 Kd6 (54...Ke4 55.Rg3 Rh6 56.Kc5 Rh5 57.Kb4 Rh8+–) 55.Kb7 g2 56.Rg2 Rh7 57.Kb6 Rh8 58.Rg7 Rd8 59.Rb7 Ke6 60.Rb8 Rd6 61.Kb5 Rd5 62.Kb4 Rd4 63.Kc3 Ra4 64.a8Q Ra8 65.Ra8 Ke5 66.Rd8 Ke4 67.Kc4 Kf3 68.Re8 Kf4 69.Kd4 Kf5 70.Ke3 Kf6 71.Kf4 Kf7 72.Re5 (72.Re2 Kf6 73.Re5 Kf7 74.Kg5 Kg7 75.Rf5 Kh7 76.Kf6 Kh6 77.Kf7 Kh7 78.Rh5) 72...Kf6 73.Ra5 (73.Re3 Kg6 74.Re6 Kg7 75.Kf5 Kf7 76.Re5 Kg7 77.Re7 Kf8 78.Kf6 Kg8 79.Re8 Kh7 80.Rf8 Kh6 81.Rh8) 73...Ke6+– 74.Ke4 Kd6 75.Kf5 Kc6 76.Ke6 Kb6 (76...Kc7 77.Rc5 Kb7 78.Kd7 Kb6 79.Kd6 Kb7 80.Rb5 Ka6 81.Kc6 Ka7 82.Ra5 Kb8 83.Ra6 Kc8 84.Ra8) 77.Rh5 Kc6 (77...Kc7 78.Rc5 Kb7 79.Kd5 Kb6 80.Kd6 Kb7 81.Rb5 Ka7 82.Kc7 Ka6 83.Rc5 Ka7 84.Ra5) 78.Rd5 (78.Ke7 Kc7 79.Rh6 Kc8 80.Kd6 Kb7 81.Kd7 Kb8 82.Kc6 Ka7 83.Kc7 Ka8 84.Ra6) 78...Kb6 (78...Kc7 79.Rc5 Kb7 80.Kd5 Kb6 81.Kd6 Kb7 82.Rc6 Kb8 83.Rb6 Ka8 84.Kd7 Ka7 85.Kc7 Ka8 86.Ra6) 79.Kd6 Ka6 (79...Kb7 80.Rb5 Ka6 81.Kc6 Ka7 82.Ra5 Kb8 83.Ra6 Kc8 84.Ra8) 80.Kc6 (80.Kc7 Ka7 81.Ra5) 80...Ka7 81.Ra5 (81.Rd8 Ka6 82.Ra8) 81...Kb8 82.Ra6 Kc8 83.Ra8 1–0. Delboy Smith (1740) – Hookem (1630), ChessWorld.net, 2016.

4.e4 b4 5.g3 (5.a3 ba3 6.Na3 Bb7+=) 5...e5 6.Qh5 (6.a3!? Nc6 7.ab4 Ra1 8.Ba1 Bb4 9.f4=) 6...Nf6–/+ 7.Qf3 (7.Qe2 Nc6–/+) 7...Bb7 8.d3 d6 (8...d5 9.Nd2 Nbd7 10.Qe2–/+) 9.Bg2 (9.c4 Nc6 10.a3 Qa8–/+) 9...Be7 (9...d5 10.Nd2–/+) 10.Ne2 (10.Qe2 d5=+) 10...c5 (10...d5 11.Nd2–/+) 11.g4 (11.a3 0–0=+) 11...d5 (11...c4 12.g5 Nfd7 13.dc4–/+) 12.Be5 (12.Qg3 de4 13.Be5 Qc8 14.de4 Nbd7=+ (14...Be4?! 15.f3+=)) 12...de4 (12...Nbd7 13.Qf4 Ne5 14.Qe5 Ng4 15.Qf4–/+) 13.de4 (13.Qg3!? Na6 14.Nd2=) 13...Be4 14.Qg3 Bc2 Threatening mate: Qd1 15.Nd2 (better 15.0–0 Na6 16.Bc6 Kf8 17.Re1–/+) 15...0–0?? (15...Ra3 16.Qf4 g5 17.Qc4–+) 16.h4?? (16.Bc7 Ra3 17.Bd8 Rg3 18.Be7 (18.Ng3?! Bd8 19.Rc1 Re8 20.Kf1 Bd3 21.Kg1 Na6=+) 18...Rg2 19.Bf8 Kf8 20.Rc1+–) 16...Ra3–+ 17.Nf3? (better 17.Qf4–+) 17...Qd3 (17...Nc6 18.Qf4–+) 18.Bb8 Ra2! The mate threat is Rxa1. 19.0–0 (19.Ra2 A deflection 19...Qd1 A classical mating theme) 19...Ra1 20.Ra1 Qe2 (20...Ne4!? 21.Qf4 Qe2 22.Rf1–+) 21.Re1 Ne4?? (better 21...Qb5 22.Bf4 Ne4–+) 22.Re2+– b3?? (22...Ng3 A) 23.Rc2 b3 (23...Rb8?! 24.fg3 b3 25.Re2–/+) 24.Rb2 Rb8 25.fg3 c4–+; B) 23.Re7?! Rb8 24.fg3 b3=; C) 23.Bg3 Bh4 24.Rc2 (24.Nh4?! b3+–) 24...Bg3 25.fg3+–) 23.Qh2 (better 23.Re4 Be4 24.Nd2 Bg2 25.Kg2 b2+–) 23...b2 24.Re1 c4 (24...b1Q 25.Rb1 Bb1+–) 25.Qe5 Bf6 26.Qc7 (26.Qb5 Bc3 27.Rf1 Bd3+–) 26...c3 (26...b1Q 27.Rb1 Bb1 28.Qb7+–) 27.Qb7 (27.g5 Bd8 28.Qb7 Nc5+–) 27...Nd2? Black plans b1 (27...Nc5 28.Qb5 Ba4 29.Qc5 Rb8+–) 28.Bd6 Rd8 (28...Be4 29.Qc7 Ra8 30.Ng5 Bg5 31.Be4 (31.Re4? b1Q 32.Kh2 Ne4 33.hg5 Re8 34.Be4 Qe4–+) 31...Ne4 32.Qc6+–) 29.Be7 (better 29.g5 b1R 30.Rb1 Bb1 31.gf6 Ne4+–) 29...Be7 30.Qe7 Rf8 31.Qb4 (31.Ne5 b1Q 32.Rb1 Bb1+–) 31...b1Q 32.Rb1 Nb1 33.Nd4 (33.Ne5!? h5+–) 33...Bd3 34.Qb3 (34.Bf1 c2 35.Qc5 Re8+–) 34...g6 (34...h5 35.Nc2 Bc2 36.Qc2+–) 35.Nc2 Bc2 36.Qc2 Rb8 37.Be4 (37.Bd5!? Kf8+–) 37...Nd2 38.Bd3 (38.Bd5!? Rb5 39.Qa2 Kg7 40.Bf7 Rb4+–) 38...Nf3 39.Kf1 Rb1 (39...Rc8 40.Qa4+–) 40.Qb1 Nd2 41.Ke2 Nb1 42.Bb1 Kg7 43.Kd3 Kf6 44.Kc3 (44.f4 h5 45.gh5 gh5+–) 44...Ke5 45.f3 (45.g5!? f6 46.f4 Ke6 47.Ba2 Kf5+–) 45...Kf4 46.Be4 f5 47.gf5 gf5 48.Bd5 (48.Kd4 h5 49.Bd5 Kg3+–) 48...h5 49.Kd3 Kg3 50.Ke3 f4 51.Ke4 Kh4 52.Kf4 Kh3 53.Kg5 h4 54.f4 Kg3 55.f5 h3 56.f6 h2 57.f7 Kf2 58.f8Q Kg1 59.Qc5 (59.Qf3 h1Q 60.Qg3 Qg2 61.Qg2) 59...Kf1 60.Kf4 Ke1 (60...Ke2 61.Qc2 Ke1 62.Bc4 h1Q 63.Qe2) 61.Ke3 Kd1 62.Bf3 Ke1 63.Qc1 1–0. Delboy Smith (1840) – WilyWeasel (1965), ChessWorld.net, 2013.

4.e4 c5 5.e5 e6 6.c3 (6.Nf3 Bb7=) 6...c4 7.a3 (7.Nf3!?=) 7...Nc6–/+ 8.f4 Bb7 (8...d6 9.d4–/+) 9.Nf3 f6 10.a4 ba4 11.Ra4 fe5 12.Rc4 Ba6 (12...Qb6 13.Qc1 Qb3 14.fe5 Ra2–+) 13.Re4 (13.Ra4 Ra4 14.Qa4 Bf1 15.Rf1 Qb8–/+) 13...Nf6 (13...Qb8 14.Ba6 Ra6 15.fe5 Qb2 16.0–0–+) 14.Ra4 Bf1 15.Kf1 (15.Rf1 ef4 16.Ra5 Qa5–/+) 15...Qb6–+ 16.Ra5 Na5 (16...Qa5?! 17.fe5 Ne5 18.Ne5 Qe5 19.d3–/+) 17.Ba3 (17.fe5 Ng4 (17...Qb2?! 18.ef6 gf6 19.Ke2=+) 18.Qe1 Nc4–+) 17...Ba3 (17...Ng4!? 18.Qe1 Qb5 19.Kg1 Ba3 20.h3 Qb6 21.d4 ed4 22.Nd4–+) 18.Na3–/+ Ng4 Threatening mate... how? 19.Qe1 ef4 (19...Qb2 20.h3 Qa3 21.hg4 ef4 22.Qe4 Qa1 23.Kf2 Qh1 24.Qa8 Ke7 25.Qh8=+) 20.h3 (20.Qh4!? Qb3 21.Qg4–/+) 20...Nh6 (20...Nf6 21.Qb1 Qb1 22.Nb1–+) 21.Nd4 (21.Qf2 Qb3 22.Qc5 Nb7–+) 21...0–0 22.Qd1 (22.Qb1 Qb1 23.Nb1–+) 22...Nc6 23.Ndb5? (23.Nac2–+) 23...Nf5 24.Ke1 Ng3 25.d4 (25.Rf1 Rf5 26.d4 Nf1 27.Kf1 Rb5 28.Nb5 Qb5 29.Qe2–+) 25...Nh1 26.Kf1 (26.c4 Ng3 27.c5 Qa5 28.Kf2 Ne4 29.Kf3 d5–+) 26...e5 (26...Ng3 27.Kg1–+) 27.Kg1 Ng3 28.Kh2 Nf5 (28...ed4 29.cd4 Nf5 30.d5–+) 29.Qb3 Kh8 30.Qc2 (30.Nc4 Qb8 31.d5 Na7–+) 30...Ne3 31.Qd3 (31.Qe4 ed4 32.cd4 Qa5–+) 31...h6 (31...ed4!? 32.cd4 f3 33.Nb1 Qb8 34.g3–+) 32.Qg6 ed4 33.cd4 Nf5 (33...Qb8 34.Kh1–+) 34.d5 (34.Nd6 Nd6 35.Qd6 Rf6 36.Qd7 Qb8–+) 34...Nfe7 (better 34...Qf2 35.Nc4 Nce7 36.Qg4–+) 35.Qd6 (35.Qd3 Ne5 36.Qf1 Nd5–+) 35...Qf2 Black prepares f3 36.Qd7 f3 (36...Ne5 37.Kh1 f3 38.Qg4 Ng4 39.hg4 Qg2) 37.Qg4–+ Ne5 38.Qg3 Qg3 39.Kg3 f2 (39...f2 40.Kh2 f1Q 41.Nc2 Nf3 42.Kg3 Nf5 43.Kf4 Nh2 44.Ke5 Re8) 0–1. Delboy Smith (1665) – irish paddy (1660), ChessWorld.net, 2009.

4.e4 c6 5.Nf3 (5.c4 bc4 6.Bc3 Ra8 7.Bc4 d5 8.ed5 cd5=) 5...Bb7 (5...d5 6.ed5 Qd5 7.Be2=) 6.c4+= b4 (6...e6 7.Qb3=) 7.d4 (7.a3 c5 8.d3 e6+=) 7...d6 (7...c5 8.Nbd2 cd4 9.Bd3+=) 8.Bd3 (8.a3 c5 9.d5 e5+=) 8...Nf6 (8...c5 9.a3+=) 9.0–0 (9.a3 c5 10.ab4 cb4 11.Ra5 Qa5+/–) 9...Nbd7 (9...d5 10.Nfd2+=) 10.Nbd2 (10.e5 de5 11.de5 Ng4+/–) 10...e5 (10...c5 11.e5 de5 12.de5+=) 11.Nb3+/– Ra8 12.de5 de5 13.Ne5 Ne5 (13...Nc5 14.Qf3+/–) 14.Be5 Bd6?? (better is 14...Nd7 15.Bb2 Qc7+/–) 15.Bd6+– Qd6 16.e5! (16.e5 Qd8 17.ef6 Qf6 18.Qe1 Qe7 19.Nc5+–) 1–0. Wall,Bill – BigAl, internet, 2004.

4.e4 e6 5.c4 b4 6.a3 =.

4.Nf3 e6 5.e3 Nf6 6.Be2 (6.c4 b4=) 6...Ba6 (6...d5 7.0–0=) 7.0–0 b4 (7...d5 8.Nd4 b4 9.a3=) 8.Ba6 (8.d3 Nc6+=) 8...Ra6 (8...Na6 9.a3=) 9.Ne5 (9.c3 d5=) 9...d6 10.Nf3 (10.Nd3 d5=) 10...Be7 (10...d5 11.a3=) 11.d3 (11.a3 d5=) 11...0–0 12.Nbd2 (12.c3 c5=) 12...c5 (12...d5 13.c3=) 13.Re1 (13.a3 Qc7=) 13...Nc6 14.e4 (14.a3 Qc7=+) 14...Qa8=+ 15.a3 (15.Qe2!?=+) 15...ba3–/+ 16.Bc3 (16.Bc1 a2–/+) 16...a2 (16...d5 17.Be5–+) 17.Nc4 (17.e5 Nd5 18.Bb2 Rb8–/+) 17...Nb4 (17...d5 18.ed5 ed5 19.Nce5–+) 18.Bd2 (18.Qd2 d5 19.ed5 Nfd5–/+) 18...Nd7 19.Bf4 e5 (19...Bf6 20.e5 de5 21.Nfe5–/+) 20.Be3 (better 20.Bc1 Rb8 21.c3–/+) 20...Nb6 (20...f5 21.Bc1–/+) 21.Ncd2? (better 21.Nb6 Rb6 22.c3=) 21...Na4 22.Qe2?? (better 22.Qc1–/+) 22...Nc3–+ (worse 22...Nc2 23.Nb3 Na1 24.Ra1–+) 23.Qf1 Nc2 24.Rec1 Na1 25.Rc3 (25.Ra1 Rb8 26.Ne1–+) 25...Nc2! 26.Rc2 (26.Nb3 Rb8 27.Rc2 Rb3–+) 26...a1Q 27.Rc1 Qb2 28.Rb1 Qc2 (28...Qa2 29.Rb3–+) 29.Qe2 (29.Rc1 Qa2–+) 29...Ra1 30.Rf1 Rf1 (30...f5 31.ef5 Rf1 32.Kf1 Qa1 33.Ne1–+) 31.Qf1 Qaa2 (31...f5 32.ef5 Qa3 33.Ne1–+) 32.h3 (32.Nc4 f5 33.ef5 Qab1–+) 32...Qcb2 (32...f5 33.ef5 Rf5 34.Qe2–+) 33.Kh2 (33.Nc4 Qba1 34.Ncd2 f5 35.ef5 Rf5–+) 33...Qaa1 34.Qe2 Rb8 35.Ng5 (35.h4 Qbc1 36.Kg3 Qh1–+) 35...Bg5 (35...Qbc1 36.Ngf3–+) 36.Bg5 f6 37.Be3 Qaa2 (37...Qbc1 38.Qg4 Qh1 39.Kg3–+) 38.Qf3 (38.Qg4 Qc2 39.Nf3–+) 38...Rb3! 39.Nc4 (39.Nb3 Qc3 Double attack (39...Qc3 Decoy)) 39...Qc3 (39...Qe2 40.Qf5 Rb8 41.Nd6 Qd3 42.Qd7–+) 40.Nd6 (40.Qg4 Rb8 (40...Qd3?! 41.Qc8 Kf7 42.Qd7 Kf8 43.Qd8 Kf7 44.Qd7 Kf8 45.Qd8 Kf7 46.Qd7=) 41.Nd6 h5–+) 40…Qd3 (40...Qd3 41.Nf5 Qae2–+) 0–1. alessandrocarvalhaes (1890) – Fr1schkaese (1985), lichess.org, 2020.

4.Nf3 e6 5.g3 (5.e3 Bb7=) 5...Bb7 6.Bg2 b4 (6...Nc6 7.0–0=) 7.d4 (7.c3 Nf6=) 7...Be7 8.0–0 h5 9.Nbd2 d5 (9...h4 10.c3=) 10.c4 h4 11.cd5 Bd5 12.Qc2 (12.e4!? Bb7 13.d5 hg3 14.fg3=) 12...hg3 13.fg3 Nf6 (13...Ra2? 14.Ra2 Ba2 15.Qa4 Nd7 16.Qa2+–; 13...Ba2?! 14.Ne5 Nf6 15.Bc6 Kf8 16.e4=) 14.e4 Bb7 15.Nc4? (15.Ne5 Ra6+=) 15...Ra7 (better is 15...Be4 16.Qe2 Ra7–+) 16.d5 ed5 17.ed5 Bd5 18.Nce5 (18.Rfe1 Nbd7+=) 18...0–0 (better is 18...Ra2 19.Ra2 b3–/+) 19.Ng5+= Bg2?? (19...Qd6 20.Rf6 Qc5 21.Qc5 Bc5 22.Rf2 Bf2 23.Kf2 Bg2 24.Kg2–/+) 20.Kg2 (20.Rf6 Bc5 21.Kg2 Qd2 22.Qd2+–) 20...Qd5= 21.Nef3 (21.Rf3 Qc5 (21...Ra2 22.Ra2 Qa2 23.Rf6 Qb2 24.Qb2 Bf6 25.Ne4 Be5 26.Qe5+–) 22.Qd3 Qd6=) 21...g6 (21...Nbd7!?–/+) 22.Rad1 (better is 22.Rfe1 Qc6 23.Qb3=) 22...Qc5 (22...Qc6 23.Qb3 Nbd7 24.Rd2+=) 23.Qb1?? (23.Qc5!? Bc5 24.Bf6 Ra2 25.Rd2 Rd2 26.Nd2+/–) 23...b3 (better is 23...Qf5 24.Qc1 Nd5–/+) 24.ab3 Ng4 (better is 24...Qb4!?+/–) 25.Bd4+– Qc6 (better is 25...Qa5 26.Qe4 c5 27.Qg4 cd4 28.Qd4 Qc5+–) 26.Ba7 Bg5 27.Kh3 (better is 27.Rde1 f5 28.Kg1+–) 27...Nd7?? (better is 27...Be3 28.Kg4 Qe6 29.Kh4 Ba7+–) 28.Ng5 Ne3 (28...Nde5 29.Qe4 Qe4 30.Ne4 f5+–) 29.Be3 Qe6 (29...Ne5 30.Bf4 Qf6 31.Rd5+–) 30.Kg2 (better is 30.Ne6 Ne5 31.Qe4+–) 30...Qe3 31.Rf3 (31.Rd7 Qg5 32.Qe4 Qh6+–) 31...Qg5 (31...Qe7 32.Qc1 Ne5+–) 32.Rdf1 (better is 32.Rd7 Qc5 33.Qe4+–) 32...Ne5 33.Rf4 Ng4 (33...Rd8 34.Qa1+–) 34.Qe4 Qh5?? (34...Ne5+–) 35.Rg4 f5 (35...Kg7+–) 36.Qe6 Rf7 37.Rh4 (37.Rg6 Qg6 38.Qg6 Kf8 39.Qh6 Ke8 40.Re1 Re7 41.Qg6 Kd8 42.Rd1 Rd7 43.Qg8 Ke7 44.Qg7 Ke6 45.Rd7 f4 46.Qf7 Ke5 47.Rd5 Ke4 48.Qe6) 37...Qe2 38.Rf2 (38.Qe2 Re7 39.Qe7 c5 40.Rh7 c4 41.Qg7) 38...Qe6–+ 39.Rh8 (39.Rh8 Kh8 40.Rd2–+; 39.Rb4–+). QQQ2 – manuel3, Live Game Caissa's Web, 2004.

4.Nf3 Nf6 5.d3 =.

4.e3 c6

5.Nf3 Bb7 6.Nc3 e6 7.Ne4 d5 8.Ng3 (better 8.Nc5 Bc8 9.Be2=) 8...Bd6?? (better 8...Nf6=+) 9.Bg7+– Bg3 (9...Nf6 10.Bh8 Nbd7 11.Bg7+–) 10.hg3 f6 (10...Nd7 11.Bh8 Ngf6 12.Rh6+–) 11.Bh8 Kd7 (11...Qe7 12.Nd4 Qf7 13.Qg4+–) 12.Rh7 Ne7 (12...Kc8 13.Nd4 Qe8 14.Qg4+–) 13.Bf6 (13.Bf6 Kc8 14.Rh8+–) 1–0. CONCEntrado (1660) – afsharian, lichess.org, 2018.

5.Nf3 Bb7 6.Be2 d6 7.0–0 Nd7 8.Nd4 (better 8.c4 bc4 9.Bc4+=) 8...g6?? (better 8...Qa8=) 9.Bc3 (9.Nc6 Bc6 10.Bh8 Qa8+–) 9...Ra8 (better 9...e5 10.Ba5 Qa5+–) 10.Nc6! Bc6 11.Bh8 f6 12.Bf3 (12.c4 Nh6 13.cb5 Bb7+–) 12...Bf3 13.Qf3 (13.gf3?! Nh6+=) 13...Nh6 14.Nc3 Ne5 (14...Nf7 15.Nb5 Rb8 16.Nd4+–) 15.Qe2 (15.Qd5 Nhf7 16.Nb5 Rc8+–) 15...Qb6 (15...Nhf7 16.Qb5 Nd7 17.Bf6 ef6 18.Nd5+–) 16.Nb5 (16.Qb5 Qb5 17.Nb5 Kd7+–) 16...Ra5 (16...Nef7 17.Qc4 Kd7 18.Bf6 ef6 19.Nd4+–) 17.Rfb1 1–0. Akrapovik (1610) – Ristorante95 (1605), lichess.org, 2020.

5.Nf3 d6 6.d4 Ra8 7.c4+= b4 (7...bc4 8.Bc4 Nf6 9.Nc3+=) 8.Bd3 Qa5 (8...Nf6 9.0–0+–) 9.0–0+– Nd7 (9...Qh5 10.a3 ba3 11.Na3+–) 10.a3 Qa4? (better 10...Rb8+–) 11.ab4+– Qd1 12.Ra8 (12.Rd1?! Ra1 13.Ba1 Bb7+–) 12...Qf1 13.Kf1 Kd8 14.Ra7 e6 15.Nbd2 f5?! (15...d5 16.c5 f6+–) 16.Ng5 Ke7 17.Rc7 h6 18.Ne6 (18.Rc8?! hg5 19.h3 Ngf6+–) 18...Ke6 19.d5! cd5 20.cd5 (20.Rc8?! Ne7 21.Ra8 dc4 22.Bc4 d5 23.Ra6 Kf7+–) 20...Ke7 21.Rc8 g6 (21...Nb6 22.Rb8 Nd5 23.Bf5 Ngf6+–) 22.Bh8 h5 (22...Ngf6 23.Bb5+–) 23.Bd4 Nh6 (23...Ngf6 24.Bb5 Ne5 25.Be5 de5 26.d6 Kf7 27.Nc4+–) 24.Bb5 Ng4 25.Rc7 Nh2 26.Kg1 Ng4 27.Rd7 Ke8 28.Ra7 Kd8 29.Bc6 Bh6 (29...Kc8 30.Bb6 Nf2 31.Ra8) 30.Bb6 Kc8 31.Ra8 1–0. Janek – Gustave, internet, 2016.

5.Nf3 e6 6.Be2 Nf6 7.Bc3 b4 8.Bb2 c5 (8...Ba6 9.d3=) 9.c3 Bb7 10.0–0 Bf3 11.Bf3 d5 12.d3 Be7 13.Nd2 0–0 14.Nb3 Ra7 15.cb4 cb4 16.Bd4 (16.Qd2 Qd6=) 16...Ra6=+ 17.Bc5 Bc5 18.Nc5 Ra3 19.d4 Na6 20.Qc2 (20.Qd2 Qd6 21.Rfc1 Ra8=) 20...Nc5 (better 20...Rc3 21.Qa4 Nc5 22.dc5 Rc5 23.Qb4 Qc7=) 21.dc5? (better 21.Qc5!? Qa5 22.Rfb1=) 21...Qc7 (21...Qa5 22.Qb2–/+) 22.Qb2 (22.Rfb1 Rb8–/+) 22...Rb8 (22...Qc5 23.Rab1–/+) 23.Rfb1 (23.Rfc1–/+) 23...Rc3 (better 23...Nd7!?–/+) 24.a3= White creates threats along the open c–file 24...Qc5 25.ab4 Qc8 26.b5 Rc7 27.Be2?? (27.Qe2 Rc5=) 27...Rcb7 (better 27...Rc2 28.Qe5 Re2–+) 28.Ra6 Rb6 29.Ra7 (29.Rb6 Rb6 30.Rc1+=) 29...Nd7 (29...Ne4!? 30.Bd3 Nd6=) 30.Rc1+– Qd8 31.Rcc7 R6b7?? (better 31...Rd6+–) 32.Rcb7+– Rb7 33.Rb7 Qc8 (33...Nf8 34.Qa3 f5 35.Qe7 Qe7 36.Re7+–) 34.Ra7 Nc5 (34...Nb6 35.Qa3 Qd8 36.Qa5+–) 35.b6 (35.Qa3!? Qb8 36.Ra8 Nd7 37.Rb8 Nb8+–) 35...Qb8 (35...h5 36.Rc7 Qf8 37.Rc5 Qc5 38.b7+–) 36.Ba6 (36.Ba6 g6 37.b7 Qa7 38.b8Q Qb8 39.Qb8 Kg7 40.Qe5 Kg8 41.Bc8+–; 36.Qa3 f5 37.Qc5 Kh8 38.Qc7 Qg8 39.b7 h5 40.b8Q Kh7 41.Qg8 Kg8 42.Qg7) 1–0. aravind555 – Alfredo63, lichess.org, 2018.

5.Nf3 f6 6.d4 Na6 (6...d5 7.Bd3+=) 7.Bd3 (7.c4 e6+=) 7...g6 (7...Nb4 8.0–0 Nd3 9.cd3=) 8.c3 (8.c4 e6+=) 8...c5 9.0–0 (9.e4 e6+=) 9...c4 (9...d5 10.e4+=) 10.Bc2 d5 11.e4 (11.Ba3 Bg4+=) 11...Bb7 12.e5 (12.Re1 de4 13.Nfd2 f5+=) 12...fe5 13.Ne5 Nh6 (13...Bg7 14.Re1+=) 14.Qf3 (14.Bc1 Nf7 15.Nf7 Kf7 16.Qf3 Kg8+=) 14...Bg7+= 15.Bc1 (better 15.Re1+=) 15...Rf8 (better 15...Be5!? 16.de5 Nf7+=) 16.Qh3+– Bc8 (16...Qc8 17.Qc8 Bc8 18.Nc6+–) 17.g4+– Ng4 (17...Bg4 18.Ng4 Ng4 19.Qg4+–) 18.Ng4 Nc7? (better 18...Qd7 19.f3 Rf7+–) 19.Qh7 Bg4 20.Qg6 (20.Qg7?! Bf5 21.Bf5 gf5+–; 20.Bg6?! Kd7=) 20...Rf7 21.Qg4 Qd6 (21...Qd7 22.Qh5 Kf8+–) 22.Bg6 Ne6 (22...Kf8 23.Bf7 Kf7 24.Bf4+–) 23.Ba3 Ra3 (23...Qd7 24.Re1 Ra6 25.Qh5+–) 24.Na3 Qa3 (24...Nd8 25.Bf7 Kf7 26.Nb5 Qc6+–) 25.Qe6 Qc3 26.Qc8 1–0. DEFFM – GuestGMJF, freechess.org, 2018.

3.Bb2 Rb5

4.Ba3 Nc6 5.e3 Ra5 6.Bb2 e5 7.Nc3 (7.Bc3 Ra8=) 7...Bb4 (7...d5 8.Nf3=+) 8.Nge2 (8.a3 Be7=+) 8...Nf6 9.Ng3 d5 10.a3 Bc3 (10...Be7!?=+) 11.Bc3= Ra8 12.Bb5 Bd7 (better 12...Qe7!?=) 13.Bc6+– Bc6 14.Be5 0–0 15.0–0 Re8 16.Bd4 Ne4 17.Qg4 Do you see the mate threat? 17...Qg5 18.Qg5 Ng5 19.Nf5 f6 20.Rfb1 Ne6 21.Bc3 g6 22.Nd4 Nd4 23.Bd4 Kf7 24.Rb3 Ra4 25.Rb4 (25.d3 b6+–) 25...Rea8+= Attacks the isolani on a3 26.Ra4 Ra4 27.Kf1 Bb5 28.d3 Ra6 (28...b6 29.Bb2+=) 29.Ke2 b6 30.Kf3 c5 31.Bb2 Ba4 32.c3 (32.Rc1 h5+=) 32...Bc2 33.d4 c4 34.h3 Be4 35.Kg3 f5 36.f3 Bd3 37.Kf4 Kf6 38.g4 g5 39.Kg3 b5 40.h4 h6 (40...fg4 41.Kg4 gh4 42.Re1=) 41.hg5 Kg5 (41...hg5 42.Rh1 Kg7 43.Rh5+=) 42.gf5 (42.Rh1 Rf6 43.Rh4 Be2+=) 42...Bf5 (42...Kf5 43.Rh1 Rg6 44.Kf2=) 43.f4 (better 43.Re1+–) 43...Kg6=+ 44.Rg1 Kh7 45.Kh4 Rg6 46.Rg6 Kg6 47.Kg3 Kh5 48.Bc1 Be4 49.Bd2 Kg6 50.Be1 Kf5 51.Kh4 Kg6 (51...Bf3 52.e4 Ke4 53.Bd2–/+) 52.Bg3 (52.Kg3 Bf5=+) 52...Bf3=+ 53.Be1 (53.Kh3 Kf5=+) 53...h5 (53...Kf5 54.Kg3 Bd1 55.Bf2=+) 54.Bg3 (54.Kg3 Be4=+) 54...Bg4 55.Bf2 Kf5 56.Bg3 Ke4 57.Bf2 (57.Kg5!?=+) 57...Kf3 58.Bg1 (58.Be1 Ke2 59.Bg3 Kd2–+ (worse 59...Ke3 60.Kg5–/+)) 58...Kg2–+ 59.Kg5?? (better 59.e4 de4 60.Be3–+) 59...Kg1 60.f5 Bf5 61.Kf5 h4 62.Ke5 (62.Kg4 Kg2 63.Kh4 Kf3–+) 62...h3 (62...Kf2 63.Kd5 Ke3 64.Kc5–+) 63.Kd5 h2 64.e4 h1Q 65.Kd6 (65.Kc5 Qe4 66.Kb5 Qd5 67.Kb6 Kf1–+) 65...Qh6 (65...Qh3 66.Kc6 Qc3 67.e5 Qd4 68.a4 c3 69.a5 c2 70.Kc7 c1Q 71.Kb8 Qd7 72.a6 Qcc8) 66.Kd5 (66.Kc5 Qa6 67.d5 Qa3 68.Kd4 Qa7 69.Ke5 b4–+) 66...Qg5 (66...Qe3!? 67.Kc6–+) 67.e5 (67.Kc6 Qe3 68.e5 Qc3–+) 67...Kf2 68.Kd6 (68.Kc6 Qe3 69.e6 Qe6 70.Kb5 Ke3–+) 68...Ke3 69.d5 (69.e6 Qd8 70.Kc5 Kd3–+) 69...Kd3 (69...Ke4!? 70.Kc6 Qe5 71.d6 Qd5 72.Kd7–+) 70.e6 Qd8 71.Ke5 Kc3 72.d6 Kb3 73.e7 Qd7 74.Kf6 c3 75.Kf7 c2 76.Kf8 (76.Kg7 c1Q 77.a4 Qg5 78.Kf7 Qdf5 79.Ke8 Qg8) 76...c1Q 77.e8Q (77.a4 Qf4 78.Kg7 Qdg4 79.Kh7 Qh2) 77…Qf1 (77...Qf1 78.Kg8 Qg2 79.Qg6 Qg6 80.Kf8 Qdd6; 77...Qh6 78.Kg8 Qe8) 0–1. aravind555 (1625) – BorislavFilipov (1640), lichess.org, 2019.

4.Ba3 Nf6 5.e3 Ra5 6.Nf3 Nc6 7.Be2 b6 8.0–0 Bb7 9.c4 g6 10.d4 Bg7 11.Nbd2?? (better 11.Bb2+=) 11...Ra3–+ 12.Qc1 Ra6 (12...Qa8 13.Qb2–+) 13.Nb3 White prepares c5 (13.c5 Ra4–+) 13...0–0 14.a3 d5 (14...Na5 15.Na5 Ra5 16.Qb2–+) 15.c5 Ra8 16.Rb1 bc5 (16...Ne4!? 17.Rd1–+) 17.Nc5 White gets in control. 17...Bc8 18.Nb7 (18.Qc3 Bf5 19.Rb3 Na5–+) 18...Bb7 19.Rb7 Qd7?? (better 19...Qd6–+) 20.Bb5= Qc8 (20...Nd4!? 21.Nd4 Qd6 22.Qc7 Qc7 23.Rc7 Ra3 24.Re7 Rb8=) 21.Bc6+– Ne4? (better 21...Qd8+–) 22.Bd5+– Nd6? (22...Qf5 23.Bc6 Nd6 24.Rc7+–) 23.Rb3 (better 23.Rc7 Qa6 24.Ba8 Ra8 25.Re7+–) 23...Ra7 (23...Ra6 24.Rc3+–) 24.Rd1 (24.Qc5 Qa6+–) 24...e6 25.Bc4 (25.Bc6 Nb7+–) 25...Ne4 (25...c5 26.Be2 cd4 27.Qc8 (worse 27.ed4 Qc1 28.Rc1 Rfa8+=) 27...Rc8 28.Nd4+– (worse 28.ed4 Rca8+=)) 26.Kf1 (26.Bd3!? Qa8+–) 26...c5+– 27.dc5 (27.Bd3!? f5 28.Qc2+–) 27...Qc5+= Attacking the isolated pawn on a3 28.Bd3 (better 28.Qc2 Nd6 29.Bd3 Qc2 30.Bc2+=) 28...Qc1 (better 28...Rc8 29.Qc5 Nc5=) 29.Rc1+– Rfa8?? (better 29...Nf6 30.Nd4 Rfa8+–) 30.Be4+– (30.Be4 Ra3 31.Rbb1+–) 1–0. aravind555 (1610) – Ichtamnet (1610), lichess.org, 2019.

4.Qc1 Rb2 5.Qb2 Nc6 6.e3 Nf6 7.Nf3 g6 8.Be2 Bg7 9.d4 e6 10.Nbd2 0–0 11.c3 b6 12.0–0 Bb7 13.c4 Ne7 14.c5 Nfd5 15.e4 Nf4 16.Bc4 d5 17.cd6 Qd6 18.e5 Qd8 19.Nb3 c6 20.Nc5 Bc8 21.Nd3 b5 22.Bb5 Nd3 23.Bd3 c5 24.Rac1 cd4 25.Qd4 Qa5 0–1. Chess4Win (1760) – Spaetzi (1750), lichess.org, 2020.

4.Qc1 e6 5.e3 Rc5 6.Ba3 Rg5 7.Bf8 Kf8 8.Nf3 Rc5 9.d4 Ra5 10.Qd2 b6 11.Be2 Ba6 12.0–0 Be2 13.Qe2 Nf6 14.Nc3 h5 15.e4 Nc6 16.d5 ed5 17.ed5 Nd5 18.Nd5 Rd5 19.c4 Rc5 20.Rad1 g6 21.Qb2 Kg8 22.Rfe1 h4 23.Rd2 Rc4 24.Rde2 Kh7 25.Qd2 Rc5 26.Qf4 Rf5 27.Qh4 Qh4 28.Nh4 Rh5 29.Nf3 Kg7 30.Rd2 d6 31.Rc2 Ne5 32.Ne5 de5 33.Rc7 Rh2 34.Kf1 Rh1 35.Ke2 Re1 36.Ke1 Rb8 37.Rc2 Kf6 38.Rb2 Ke6 39.Ke2 f5 40.f3 g5 41.a4 g4 42.a5 b5 43.a6 Ra8 44.Rb5 Ra6 45.Rb2 g3 46.Rd2 f4 47.Rc2 Kf5 48.Kd3 Ra3 49.Rc3 Rc3 50.Kc3 e4 51.fe4 Ke4 52.Kd2 f3 53.gf3 Kf3 54.Ke1 Kg2 55.Ke2 Kh1 56.Kf1 g2 57.Kf2 g1Q 0–1. Chess4Win (1680) – Keesvantol (1650), lichess.org, 2019.

4.Qc1 f6 5.e4 Rb4 (5...Ra5 6.d4+=) 6.d3 (6.Nc3 Rb6+=) 6...c5 (6...e5 7.Ba3 Rb6 8.Bf8 Kf8 9.Be2=) 7.Ba3 (7.Nf3+=) 7...Rb5 (better 7...Ra4!?=) 8.d4!+– Qa5 (8...cd4 9.Bb5) 9.Kd1 (9.c3 Rb6 10.Bc5 Rc6+–) 9...Rb6 (9...cd4 10.Bb5 Qb5 11.Nf3+=) 10.dc5 (10.Bc5!? Rc6+–) 10...Re6 (10...Rc6 11.Nf3 e5 12.Qd2+=) 11.Qf4 (11.Nd2 Nh6+–) 11...Nc6 (11...Na6 12.Bc4 Rc6 13.Nf3+=) 12.Bc4+– d5 (12...Re5 13.Nf3 Rh5 14.Qd2+–) 13.Bd5 g5? (better 13...Re5+–) 14.Qd2+– Re5 (14...Qc7+–) 15.Bc6 bc6 16.Qa5 Re4 17.Ne2 (better 17.Qa8 Rd4 18.Ke1 Rd8 19.Qc6 Bd7+–) 17...Bg4 (17...e5 18.Nbc3 Rh4 19.Qc7+–) 18.f3 Re2 19.Ke2 Bf5 20.c4 e5 21.Qa8 Kf7 22.Qc6 Ne7 23.Qb5 (23.Qc7 h5+–) 23...Bg7 24.Nd2 (24.c6 Nc8+–) 24...h5 25.c6 Rc8 26.Be7 Ke7 27.Ne4 Be4 28.fe4 (28.Qb7 Kf8 29.Qc8 Kf7 30.fe4 Kg6 31.Qe8 Kh7 32.Qh5 Kg8 33.c7 Bh6 34.c8Q Kg7 35.Qce8 f5 36.Qhg6) 28...Kd6 29.Rhd1 Ke7 (29...Ke6 30.Rd7 f5 31.Qd5 Kf6 32.Qd6) 30.Qb7 (30.Rd7 Kf8 31.Qd5 Rc6 32.Qf7) 30...Rc7 (30...Kf8 31.Rd7 Kg8 32.Rg7 Kh8 33.Rh7 Kg8 34.Qf7) 31.Qc7 (31.Qc7 Ke6 32.Qd7) 1–0. Delboy Smith (1680) – Hookem (1750), ChessWorld.net, 2011.

4.Bc3 (4...Nc6 5.e4+=). pinski – Ruthless Rook, ChessWorld.net, 2005.

4.Bc3 Nf6 5.e3 Rb6 6.Bd4 Re6 7.Bb5 c6 8.Be2 d5 9.Nf3 Nbd7 10.0–0 c5 11.Bc3 Ne4 12.Bb5 Nc3 13.Nc3 Rd6 14.d4 c4 15.e4 e6 16.ed5 ed5 17.Ne5 Be7 18.Qf3 0–0 19.Bd7 Bd7 20.Nd5 Bc6 21.Nc6 bc6 22.Ne7 Qe7 23.Qa3 Qf6 24.c3 Qg6 25.Qb4 Qe6 26.Rae1 Qd7 27.Qc4 Qg4 28.f3 Qg5 29.Re5 Qd2 30.Rfe1 Rg6 31.R5e2 Qf4 32.Qb4 h6 33.Qf8 Kh7 34.Re8 Rg5 35.Qh8 Kg6 36.Rg8 Qf6 37.g4 Ra5 38.f4 Ra2 39.Rg7 Qg7 40.f5 Kf6 41.g5 hg5 42.Qd8 Kf5 43.Rf1 Kg6 44.Qd6 f6 45.Rf6 Qf6 46.Qg3 Ra1 47.Kg2 Qf1 0–1. anotherheaven (1730) – hamekasi (1745), lichess.org, 2015.

4.e3 Rb2 5.Qc1 Rb6 6.Nf3 Na6 7.Nc3 e6 8.d4 Bb4 9.Qd2 Bc3 10.Qc3 Nf6 11.Bd3 Nd5 12.Qd2 Nab4 13.Bc4 Rc6 14.Bb3 Qf6 15.Ne5 Ra6 16.Bc4 Rb6 17.Rb1 Nc6 18.Rb6 Nb6 19.Nc6 bc6 20.Bb3 Ba6 21.c4 0–0 22.Qc3 Qg5 23.0–0 d5 24.Rc1 dc4 25.Bd1 Nd5 26.Qa5 Ra8 27.Be2 Bb7 28.Qd2 g6 29.Bc4 Ba6 30.Qb2 Bc4 31.Rc4 Rf8 32.Rc6 Nf6 33.a4 Qh4 34.a5 Ng4 35.h3 Nf6 36.Rc7 Qe4 37.d5 Nd5 38.Rd7 Qb4 39.Qa2 Qb8 40.a6 Nb4 41.Qa5 Na6 42.Qa6 Rc8 43.Rd1 Rc2 44.Qf1 Qb2 45.Rb1 Qe5 46.Qd1 Rc5 47.Qe2 Rd5 48.f4 Qe4 49.Kf2 g5 50.g3 gf4 51.gf4 Rf5 52.Rg1 Kf8 53.Qa6 Qc2 54.Qe2 Qe2 55.Ke2 Rh5 56.Rh1 Ke7 57.Kf3 Kf6 58.Kg4 Rh6 59.h4 Rg6 60.Kh5 e5 61.Rf1 ef4 62.Rf4 Ke6 63.Re4 Kf5 64.Rf4 Ke5 65.Rg4 1–0. Chess4Win (1645) – EMAX007 (1700), lichess.org, 2019.

4.Nf3 Rb2 5.Qc1 Rb6 6.e3 g6 7.c4 Bg7 8.Nc3 c5 9.a4 Nc6 10.Qa3 d6 11.Be2 Nb4 12.Rc1 Bf5 13.0–0 Nd3 (13...Nf6 14.d4–+) 14.Ra1 Rb4 (14...Ne5 15.d4 Nf3 16.Bf3 cd4 17.ed4 Bd4 18.a5–+) 15.h3 (15.Ra2 Nf6 16.e4 Ne4 (16...Rc4 17.ef5 Rc3 18.dc3+=; 16...Be4?! 17.Ne4 Nf4 18.Qe3 Ne2 19.Qe2–/+) 17.Bd3 Nc3 18.dc3 Bd3 19.cb4 Bc4 20.bc5 Ba2 21.Qa2 dc5–/+) 15...Ne5 (better 15...Nb2 16.Qa2 Qa5–+) 16.Ne5 Be5 17.f4? (better 17.d4 Bg7 18.Nd5–/+) 17...Bg7 18.Bf3 (18.a5 Qd7–+) 18...b6 (18...Qa5 19.Rfe1–+) 19.e4 (19.Bc6 Kf8–+) 19...Be6 (19...Bd7 20.d3–+) 20.d3 Bd4 21.Kh1 Nf6 22.Rac1 h5 23.Ne2 (23.Rc2 Bd7–+) 23...Be3 (better 23...Bb2 24.Qa2 Bc1 25.Nc1–+) 24.Rc2 h4 (24...Bd7 25.Qc3 Qb8 26.d4 Ba4 27.Ra2–+) 25.Ra2? (25.d4 Bf4! 26.Nf4 Bc4–+) 25...Nh5 (better 25...Bd7 26.Qc3 Ra4 27.Ra4 Ba4 28.e5 de5 29.fe5–+) 26.Kh2?? (better 26.Bh5 Rh5 27.Qc3–+) 26...Ng3! 27.Ng3 hg3 (27...Bf4!? 28.Kh1 hg3 29.Re1–+) 28.Kg3 Bd7 29.a5 (29.Bg4 e6–+) 29...e5 30.Kf2 (30.fe5 0–0 31.Kg4–+) 30…Qh4 (30...Qc8 31.g4 Rh3 32.g5 Bc6 33.Be2) 0–1. amirgloo (1850) – championreeve (2260), lichess.org, 2020.

3.Bb2 b6

4.Na3 Nc6 (4...Ba6 5.e3 Bf1 6.Kf1 Nc6 7.Nf3 d5 8.Qe2 Nf6) 5.Nc4 Rc5 6.e3 Ba6 7.Nd6 ed6 8.Ba6 Nb4.

4.Nc3 Nf6 (4...Nc6 5.e4 Nf6 6.Nf3 e5 7.Bc4 Bc5 8.0–0 0–0) 5.Nf3 Nc6 6.e4 Bb7 7.Bc4 Ne4 8.Ne4 d5.

4.e3 Bb7 5.Bc3 Ra8 6.Nf3 d5 7.Be2 Nd7 8.0–0 Ngf6 9.a4 e6 10.Bb2 c5 11.c4 Be7 12.Nc3 0–0 13.d4 dc4 14.Bc4 cd4 15.Nd4 Qc7 16.Be2 e5 17.Ndb5 Qc8 18.Rc1 Nc5 Black prepares the advance e4. Exerts pressure on the isolated pawn 19.Nd6 Bd6 20.Qd6 e4 21.Qb6+/– Ba6 22.Nb5+– Qf5?? 23.Rc5 Qg6 24.Bf6 gf6 25.Nc7 Rfb8?? 26.Qc6 Be2 27.Na8 Bf1 28.Kf1 Rb1 29.Rc1 Rc1 30.Qc1 Qf5 31.Nb6 Qa5 32.Qc8 Kg7 33.g3 (33.g3 Qb6 34.Qg4 Kf8 35.Qe4+–) 1–0. alfons78 – fakazer, kurnik, 2011.

4.e3 Bb7 5.Nf3 d6 6.Bd3 Nd7 7.0–0 Ngf6 8.Nc3 g6 9.Ne1 Bg7 10.Ne2 0–0 11.Ng3 Qa8 12.Qb1 Nc5 13.Bc3 Ra7 14.Be2 Na4 15.Bb2 Nb2 16.Qb2 Ne4 17.c3 Ng3 18.fg3 e6 19.Bf3 Bf3 20.Nf3 Qd5 21.Qc2 Rfa8 22.c4 Qf5 23.e4 Qc5 24.d4 Bd4 25.Nd4 Qd4 26.Kh1 Qe5 27.a4 Ra5 28.Ra2 Kg7 29.Qf2 f6 30.Qc2 h5 31.Rfa1 Rh8 32.Kg1 h4 33.g4 Qd4 34.Kf1 h3 35.g3 Rha8 36.Ke2 Re5 37.Kf3 f5 38.Rd1 fe4 39.Ke2 Qc5 40.Rf1 e3 41.Qd3 d5 42.Rc2 d4 0–1. world1star (1780) – viki930127 (1800), kurnik, 2012.

4.e4 Bb7 5.Na3 Nf6 6.Nc4 Ra4 7.e5 Nd5 8.Nf3 Nc6.

4.e4 Bb7 5.d3= Nf6 6.Nc3 Nc6 7.Nf3 e5 8.Be2 Bc5.

4.e4 Nf6 5.e5 Nd5 (5...Ne4 6.d3 (6.Nf3 Nc6 7.Nc3 d5 8.Be2 Bf5) 6...Nc5 (6...Ng5 7.h4 Ne6 8.Nd2 Nc6) 7.Nf3= (7.Nc3 Nc6 8.d4 Na4) 7...Na4 8.Bc3 Nc3) 6.Bc4 (6.c4 Nb4= (6...Nf4 7.Bc3 Ra7 8.g3 Ng6) 7.a3 N4c6 8.Nf3 e6) 6...e6 (6...Nc6 7.Nf3 Nf4 8.0–0 Bb7) 7.Nf3 f6 (7...Bb7 8.Nc3= Nc6; 7...Ba6 8.Ba6 Na6) 8.Nh4 (8.0–0= Nc6; 8.ef6 Nf6) 8...fe5 (better is 8...Nf4!? 9.ef6 gf6=; 8...Qe7+=) 9.Qh5+/– g6 10.Ng6! Nf6 (10...hg6 11.Qg6 Double attack (11.Qh8 Pinning; 11.Qh8 Deflection)) 11.Qh3 Rg8 12.Ne5 d6? (better is 12...Bd6!? 13.f4 Bb7+/–) 13.Be6+– Be6 (13...de5 14.Bc8 Qd5 15.f3+–) 14.Qe6 Qe7 15.Qc8 Qd8 16.Qd8 Kd8 17.Nc4 Rb5 (17...Nbd7 18.Na5 ba5+–) 18.Bf6 (18.Bf6 Kd7 19.Ne3+–) 1–0. Wall,Bill – Inman,Joey, chess.com, 2007.

4.Nf3 Bb7= (4...Nc6 5.e3 Nf6 6.Nc3 g6 7.Bb5 Bg7 8.0–0 0–0; 4...Nf6 5.e3 Nc6 6.Nc3 g6 7.Bd3 Bg7 8.0–0 0–0) 5.Na3 Nc6 6.Nc4 Rc5 7.e4 Ba6 8.Nd6 cd6.

3.Bb2 Nc6

4.Bc3 Ra8 5.Nf3 =.

4.e3 e5 5.Nf3 d6 6.d3 Nf6 7.Nbd2 Be7 8.Be2 Be6 9.a3 0–0 10.0–0 Bd7 11.c4 h6 12.Qc2 b6 13.d4 ed4 14.ed4 d5 15.c5 bc5 (15...Re8 16.Rfe1=) 16.Nb3+= Ra8 17.Nc5 Be8 (17...Bc5!? 18.dc5 Ne4+=) 18.Rfb1 Bd6 19.Bd3 Ne7 20.Bc1 (20.a4 Ra7+/–) 20...Nc8 (20...Bc5 21.dc5 Ba4 22.Qb2+=) 21.Bd2 Bc5 22.Qc5 Ne4 23.Be4 de4 24.Bb4 Nd6 25.Nd2 Bb5 (25...Ba4 26.Ba5 Nb5 27.Rb5 Bb5 28.Qb5 Qd4 29.Nb3+=) 26.Re1 (better is 26.Ne4!? Bd3 27.Nd6 cd6 28.Qd6 Qd6 29.Bd6 Bb1 30.Bf8 Kf8 31.Rb1 Ra3 32.Kf1+/–) 26...Re8= 27.Rac1 Bd3 28.Qc7 Nb5 29.Qf4 e4 draws heavy fire (better is 29.Qd8!? Rad8 30.Nb3=) 29...Nd4+= (worse is 29...Na3 30.Ba3 Ra3 31.Ne4 Be4 32.Re4+/–) 30.Rc7 Qd5 31.Qg4 Nc2 32.Rc5 Qe6 33.Qe6 Re6 34.Rc1 Nd4 (better is 34...Nb4!? 35.ab4 Ra2–/+) 35.Rc8= Re8 36.Ra8 Ra8 37.Rc5 (37.Kh1 f5+=) 37...Nc2–/+ 38.Rc3?? (better is 38.f3 e3 39.Nb3–+) 38...Nb4–+ 39.Ne4 Be4 40.f3 (40.Rc4 Ra3 41.h4 Bg2 42.Kg2 Nd3–+) 40...Nd5 (better is 40...Na2 41.Re3 Bd5 42.Kf2–+) 41.Rc5 Ra3 42.fe4 Nf4 (42...Nf6 43.Rc4–+) 43.Rc4 Ra2 44.g3 Nh3 45.Kh1 Re2 (45...Ng5!? 46.Rc5–+) 46.Rc8 Kh7 47.Re8 (47.e5 Ng5 48.Rc3 Re5–+) 47...Re4! 48.Rb8 (48.Re4 Nf2 Double attack (48...Nf2 Decoy)) 48...Re2 49.g4 Nf2 (49...Rd2!? 50.Rb3 Nf2 51.Kg1 Ng4 52.h3–+) 50.Kg2 Ng4 (50...Nd3!? 51.Kg3–+) 51.Kf3 Rh2 52.Kg4 Ra2 53.Rb7 Ra4 54.Kf5 Ra5 55.Kg4 Kg6 56.Rb6 f6 57.Rb4 Rg5 58.Kh3 Rg1 59.Kh2 Re1 60.Kg2 f5 61.Kf2 Re4 62.Rb6 Kg5 63.Kg2 g6 64.Rd6 h5 65.Rd3 (65.Kf3 h4–+) 65...f4 66.Rd5 (66.Kf2 Kg4–+) 66...Kg4 67.Rd2 (67.Kf2 f3–+) 67...g5 (better is 67...Re2! 68.Re2 f3 69.Kf2 fe2 70.Ke2–+) 68.Kh2 f3 69.Kg1 (69.Rd5 h4 70.Rc5 Re2 71.Kg1 h3–+) 69...Re1 (69...Re1 70.Kf2 Re2 71.Re2 fe2 72.Ke2 Kg3–+) 0–1. Franco Rincon,David (1695) – Saber,Salah (1865), Cto Absoluto de Madrid, 2015.

4.e3 e6 5.Nf3 Nf6 6.d4 g6 7.Nc3 Bg7 8.Ne5 (8.e4 0–0=) 8...Nb4 (8...Ne5!? 9.de5 Re5–/+) 9.Qd2 0–0 10.Ne2 Qe7? (better is 10...Ra4=) 11.a3+– Re5? (11...Nc2 12.Qc2 d6+–) 12.de5 (12.ab4?! Ne4 13.Qc1 A) 13...Qb4? 14.c3 Nf2 15.cb4 (15.de5?! Qh4 16.Ra4 Nd3 17.Kd2 Qa4 18.Kd3 Be5=; 15.Kf2?! Rf5 16.Nf4 Qb6+–) 15...Nd3 16.Kd2 Nc1 17.Rc1+– (17.de5?! Nb3 18.Ke1 Na1 19.Ba1 d6+=; 17.Nc1?! Re4+–; 17.Bc1?! Rg5+–; 17.Kc1?! Re3 18.Kd2 Bh6+=); B) 13...Rf5+=; 12.Qb4?! Qb4 13.ab4 Rb5+/–) 12...Nfd5 13.ab4 Nb4 14.Ba3 c5 15.Bb4 cb4 16.Qd6 (16.f4 f6 17.ef6 Qf6+–) 16...Qd8?? (better is 16...Qd6 17.ed6 Ba1+=) 17.Rb1 Re8 18.Qb4 (worse is 18.Rb4 Bf8 19.Qb6 Bb4 20.Qb4 f6 21.ef6 Qf6+–) 18...Be5 19.Nd4 d6 20.Bd3 Bg7 21.0–0 d5 22.Nf3 e5 23.Be2 e4 24.Nd4 Bf8 25.Qc3 Bg7 26.Qd2 Qc7 27.Qd1 Bd7 28.Bb5 Bc8 29.Be2 f5?? 30.h3 Bd7 31.Rc1 f4 32.c4 dc4 33.Rc4 Qd8 34.Rb4 Qg5 35.Bg4 Bg4 36.Qg4 Qe7 37.Qf4 Be5 38.Qg4 Qb4= 39.Qe4?? Qe7 40.Qd3 Bb8 41.Nf3 Rd8 42.Qc4 Kg7 43.Qc3 Kh6 44.Qc4 Rf8 45.Rb1+/– Qd6? 46.Qh4+– Kg7 47.Rb7 Bc7 (47...Bc7 48.Qd4 Kh6 49.Qd6 Bd6+–). dragonre – fakazer, kurnik, 2012.

4.Nf3 d6 5.e3 e5 6.d4 ed4 7.Nd4 Nd4 8.Qd4 Nf6 9.Nd2 Be7 10.Nc4 Rd5 11.Qf4 Be6 (11...Rf5 12.Qg3=+) 12.e4 (12.Bd3 0–0=) 12...Rc5=+ 13.e5 (13.Ne3!?=+) 13...de5–/+ 14.Ne5 Rc2?? (better 14...Qa8 15.Nc4 0–0–+) 15.Bd4?? (better 15.Qa4 Rc6 16.Nc6 bc6 17.Qc6 Bd7 18.Qc3+–) 15...Bb4–+ 16.Kd1 Rd2 17.Kc1 Rd4 18.Qf3 (18.Bb5 c6 19.Bc6 bc6 20.Qf3–+) 18...Ba3! 19.Kc2 (19.Qa3 Rd1 Mate attack) 19...Rd2 20.Kb1 Rb2 21.Kc1 Qd2 0–1. amirgloo (1815) – tosmilesplease (1715), lichess.org, 2021.

3.Bb2 d5

4.d3 e6 5.a3 Nc6 6.Nd2 Rb5 (6...e5 7.Ngf3=+) 7.Nb3= Nf6 (better 7...d4=) 8.g4 (better 8.Nf3!?=) 8...Ng4–/+ 9.e3 (9.Nf3 d4!–/+) 9...e5 (9...Qh4 10.Qe2–/+) 10.Bg2 (10.Nf3 d4 11.h3 Nh6–/+) 10...Qf6 (better 10...Be6–/+) 11.f4?? (better 11.Nf3–/+) 11...Ne3–+ 12.Qe2 Qh4 13.Kd2 Qf4 (better 13...Ng2 14.Qg2 Qf4 15.Ke1 Qh4 16.Kd1 e4 17.de4 de4–+) 14.Nh3?? (better 14.Qe3 Qe3 15.Ke3=+) 14...Nc4 (14...Bh3!? 15.Be5 Nc4 16.Kc3 N6e5 17.Bh3 Ba3 18.Ra3 d4 19.Nd4 Na3 20.Nb5 Nb5 21.Kb2 Qd4 22.Kc1–+) 15.Ke1 Qh4 16.Nf2 (16.Qf2 Qf2 17.Nf2 Ne3–+) 16...Nb2 17.Kd2 (17.d4 Nc4 18.Bd5 Rd5 19.Qc4 Be6–+) 17...Be7 18.h3 (18.Ke1 Nd4 19.Nd4 Qd4–+) 18...Bg5 (better 18...Rb3 19.Bd5 Nd4 20.Bb3 Ne2 21.Ke2–+) 19.Ke1 Rb3! 20.cb3 Nd3! 21.Qd3 0–0 (better 21...e4 22.Qd5 e3–+) 22.Rg1 (22.Bd5 Nd4 23.Be4–+) 22...e4 23.Qc3 (23.Qd5 Be3 24.Ra2 Bf2 25.Rf2 e3–+) 23...Bf6 24.Qc1 Nd4 (better 24...Ba1 25.Qa1 e3 26.Rf1–+) 25.Rb1 (25.Ra2 Qg3 26.Qd1 b6–+) 25...Bf5 (better 25...e3 26.Rb2 Re8–+) 26.Qe3 (26.Kf1 e3! 27.Qe3 Bb1 28.Bd5 Nf5–+) 26...Re8 (better 26...Nc2 27.Ke2 Ne3 28.Bh1–+) 27.Rd1 (27.Rc1 Bd7 28.Kd1 Qh5 29.Ke1 Nf3 30.Bf3 ef3 31.Qe8 Be8 32.Ng4 Bh4 33.Kd2–+) 27...Nc2 28.Kf1 Ne3 29.Ke1 Nc2 (29...Ng2 30.Rg2 e3 31.Rd3 ef2 32.Kd1 f1Q 33.Kc2 Qd3 34.Kc1 Re1) 30.Kf1 e3 31.Re1 (31.Rd2 ef2 32.Be4 Bh3 33.Rg2 Qe4 34.Rc2 Qg2) 31…Qf2 0–1. adabriwala – Sashastar2019 (1750), lichess.org, 2019.

4.e3 Ra8 5.Nc3 (5.Nf3 Nf6=) 5...Nc6 (5...Nf6 6.Nf3=) 6.Nf3 e6 7.Bd3 (better is 7.Bb5=) 7...Bb4 (better is 7...Nf6!?=) 8.Nd5!+/– ed5?? (8...Qd5 9.Bg7 Combination; 8...ed5 9.Bg7 Combination) 9.Bg7+– Nge7 10.Bh8 Ng6 11.Bg7 f6 12.c3 Bd6 13.Qc2 Qe7 (13...Kf7 14.Bh6+–) 14.Bg6 Kd8 15.Bf6! Qf6 16.Bh7 Qg7 (16...Ne7 17.h3+–) 17.0–0 (17.Qg6 Qg6 18.Bg6 Bg4+–) 17...Ke7 (17...Bg4 18.Qg6 Qg6 19.Bg6 Bf3 20.gf3+–) 18.Nh4 (18.Bf5 Be6+–) 18...Be6 (18...Qf6 19.Nf5 Bf5 20.Qf5+–) 19.Nf5 Bf5 20.Bf5 Rg8 21.g3 Ne5 22.f4 Ng4 (22...Nc4 23.e4+–) 23.Bg4 Qg4 24.Qb3 Rh8 (24...Qh5 25.Qb7 Rh8 26.Rf2+–) 25.Qd5 Rh7 (25...Qh3 26.Qg2 Qh6+–) 26.Qe4 Kd7 27.Qh7 Kc6 28.Qe4 Kd7 29.Qb7 Ba3 30.Qb5 c6 31.Qb7 Kd6 32.Qb8 Kc5 33.Qe5 Kb6 34.Rab1 Ka7 (34...Bb4 35.Rb4 Ka6 36.Ra4 Kb7 37.Rb1 Kc8 38.Rb8 Kd7 39.Ra7) 35.Qa5 1–0. kwuk – mikc, internet, 2009.

4.e3 Nf6 A) 5.Nc3 Nc6 (5...g6 6.Bd3 Nc6 7.Nf3 Bg7 8.0–0 0–0 9.Nb5 Bf5; 5...d4 6.ed4 Qd4 7.Nf3 Qb6 8.Rb1 Nc6 9.Bb5 e6; 5...e5 6.Nf3 Nc6 7.Nb5 Bd7 8.a4 e4 9.Ne5 Bb4; 5...Bd7 6.Nf3 Nc6 7.Nb5 e5 8.a4 e4 9.Ne5 Bb4) 6.Nf3 g6 7.Bd3 Bg7 8.0–0 0–0 9.Nb5 Bf5; B) 5.Nf3 Nc6 6.Nc3 g6 7.Nb5 Bg7 8.Bc3 Ra4 9.Qb1 0–0.

4.Nf3 Ra8 5.e3 c5 6.c4 Nf6 7.Nc3 e6 8.cd5 ed5 9.Bb5 Nc6 10.0–0 Bg4 11.Be2 Bd6 12.h3 Bh5 13.Qb3 Rb8 14.Kh1 (worse is 14.Nd5 Nd5 15.Bg7 Rg8–/+) 14...0–0 (better is 14...Be7!?=) 15.Nd5+/– Nd5 16.Qd5 Bg6 17.Qb3 Qc7 18.Qc3 f6 19.Bc4 Kh8 20.d4 cd4 21.Nd4 Nd4 22.Qd4?? (22.ed4 b5 23.Be6 Qe7+/–) 22...Rbd8?? (22...Be5!? 23.Qg4 Bb2 24.Rad1–+) 23.Qc3?? (better is 23.Qg4+/–) 23...Be5–+ 24.Qb3 Bb2 25.Qb2 Qc4 26.Rac1 (26.Qb7 Be4 27.Qb3 Qc6–+) 26...Qe4 27.Rc2?? (27.Rfd1 Bf7 28.Rd8 Rd8–+) 27...Bf5 (better is 27...Qc2 28.Qb7 Bd3–+) 28.Rfc1 Bh3 29.f3 Bg2! 30.Kg2 (30.Rg2 Qf3 Combination; 30.Kg2 Qe3 Combination) 30...Qe3 31.Rf1 h6 (31...Qg5!? 32.Kh1–+) 32.Qb7 Qg5 33.Kh1 Qh4 34.Rh2 Qd4 35.Rg1 Rd7 36.Qb3 Rff7 (36...Qf4 37.Re2–/+) 37.Qb8 Rd8 38.Qb3 Rdf8 (38...Re7 39.Qb5–/+) 39.Rg4 Qa1 40.Rg1 Qe5 41.Rhg2 f5 42.Rg6 Qf4 (42...Qf4 43.R6g2 Re7–+) 0–1. Fournier,Frederic (1825) – celtes (1850), Active, 2005.

4.Nf3 Nc6 5.a4 Nf6 (5...e6 6.Nc3 Nf6 7.e3 Bc5 8.Be2 0–0 9.0–0 Bd7; 5...Bd7 6.Nc3 Nf6 7.Nb5 e6 8.g3 Bb4 9.Bg2 0–0) 6.Nc3 e5 7.Nb5 Bc5 8.Be5 Ne5 9.Ne5 c6.

4.Nf3 Nc6 5.Nc3 d4 6.Ne4 f5 7.Ng3 f4 8.Ne4 Bf5 9.d3 Nf6.

4.Nf3 Nc6 5.e3 Bd7 6.d3 Qa8 7.Be2 Ra2 8.Ra2 Qa2 9.Qc1 e6 10.Nbd2 Bd6?? (better is 10...f6+=) 11.Bg7+– Nb4 12.Bh8 Nc2 13.Kd1 (better is 13.Kf1!? Ba3 14.Qb1 Qb1 15.Nb1 Bd6+–) 13...Ba4 14.Qb2?? (better is 14.e4+–) 14...Nd4–+ 15.Ke1 Qb2 (15...Qb2 16.Kf1 Qc1 17.Ne1 Bb4–+) 0–1. Fournier,Frederic (1895) – jispo2 (1680), Active echecs21.com, 2004.

4.Nf3 Nc6 5.e3 e6 6.Nc3 Nf6 7.Nb5 Be7 8.Bc3 Ra4 9.Bd3 0–0.

4.Nf3 Nc6 5.e3 Nf6 6.Bc3 Ra8 7.Bb5 Bd7 8.Bf6 gf6 9.Nc3 Rg8.

4.Nf3 Bd7 A) 5.Nc3 Nf6 (5...Nc6 6.e4 de4 7.Ne4 Nf6 8.Bd3 Ne4 9.Be4 f5) 6.e3 Nc6 7.Nb5 e5 8.a4 e4 9.Ne5 Bb4; B) 5.e3 Nc6 (5...e6 6.c4 Nf6 7.cd5 Ba4 8.Qc1 ed5 9.Bc3 Ra8; 5...h5 6.Nc3 Nf6 7.Be2 Nc6 8.0–0 g6 9.Nb5 Bg7; 5...Nf6 6.Bc3 Ra7 7.Bd4 Ra5 8.Bc3 Ra7 9.Bd4 Ra5; 5...h6 6.Nc3 Nc6 7.Be2 Nf6 8.0–0 e6 9.Nb5 Be7; 5...Nh6 6.Nc3 Nc6 7.Bd3 e5 8.e4 de4 9.Be4 Bc5) 6.c4 Nf6 7.Nc3 e6 8.Qb3 Be7 9.cd5 ed5.

4.Nf3 Nf6 A) 5.h3 Nc6 (5...g6 6.e3 Bg7 7.Nc3 0–0 8.Bd3 Nbd7 9.0–0 Nc5; 5...Bf5 6.Nd4 Bd7 7.Nb3 Ra8 8.Bf6 ef6 9.Nc3 Be6) 6.e3 g6 7.Nc3 Bg7 8.Bd3 e5 9.Bb5 0–0; B) 5.e3 Nc6 (5...g6 6.c4 Nc6 7.cd5 Rd5 8.Bf6 ef6 9.Nc3 Rh5; 5...e6 6.Nc3 Nc6 7.Nb5 Be7 8.Bc3 Ra4 9.Bd3 0–0) 6.Bc3 Ra7 7.Bb5 Bd7 8.Bf6 gf6 9.Nc3 Rg8; C) 5.Bc3 Ra8 (5...Ra4 6.e3 Nc6 7.Bb5 Rg4 8.0–0 Bd7 9.h3 Rg6) 6.e3 e6 7.Bb2 Nc6 8.Nc3 Bd7 9.Be2 Bc5; D) 5.a4 g6 (5...Nc6 6.Nc3 g6 7.e4 d4 8.Nb5 Bg7 9.Nbd4 Nd4) 6.e3 Nc6 7.Bd3 Bg7 8.0–0 0–0 9.Nc3 e5.

4.Nf3 h6 5.e3 e6 6.c4 Nf6 7.Be2 Nc6 8.Bc3 Ra8 9.0–0 Ne4 10.Qc2 Ng5 11.d3 Nf3 12.Bf3 dc4 13.dc4 Bd7 14.Rd1 e5 15.Nd2 Be7 16.a4 Bf6 17.Ne4 Ne7 18.Nc5 Ra7 19.Nd7 Qc8 20.Bg4 Qa8 21.Be5 Be5 22.Ne5 Ra6 23.Bd7 Kf8 24.c5 Rf6 25.Qb3 Nc6 26.Bc6 bc6 27.Nd7 Kg8 28.Nf6 gf6 29.a5 Kg7 30.Rd7 Rf8 31.Ra4 Qb8 32.Rg4 Kh8 33.Qa2 Rd8 34.Qa1 Rd7 35.Qf6 Kh7 36.Qg7 Black king mated 1–0. Crusader Rabbit (1770) – chytros (1655), ChessWorld.net, 2015.

4.f4 Nf6 5.Bc3 Ra8 6.Nf3 c5 (6...Bf5 7.Nd4 Bg4 8.h3+=) 7.d4 (7.e3!?=) 7...c4+= 8.Nbd2 Bg4 9.e3 Ne4 (9...e6 10.Be2+=) 10.Ne4 de4 11.h3 ef3 (11...Bh5 12.Qb1 A) 12...Bf3 A1) worse is 13.gf3 Qd5+= (worse is 13...ef3 14.Qb7 Ra3 15.Kd2+–); A2) 13.Qb7 Ra3 14.Bb2 Re3 15.Kf2 Bg2 16.Bg2 Rf3 17.Bf3 ef3 18.d5+–; B) 12...ef3 13.Qb5 Qd7 14.Qh5 fg2 15.Bg2 e6+=) 12.hg4+/– Ra3 13.Bb4 (better is 13.Qd2+=) 13...Re3+= 14.Kf2 Re6 (14...Re4 15.c3 fg2 16.Bg2 Rf4 17.Ke3–/+) 15.Kf3 (better is 15.gf3!? Qc7 16.d5=) 15...Qd5–/+ 16.Kf2 Nc6 17.Bc3 g6 (17...Re4 18.g3 Rd4 19.Bd4 Qh1+= (19...Nd4? 20.Rh5 Qe4 21.c3+–)) 18.Be2 (18.Qf3 Qf3 19.gf3 Bg7+=) 18...Bg7= d4 becomes the focus of attention 19.Bf3 Qd8 20.d5 Bc3 21.de6 Qb6 22.Kg3 Ba1 23.Qd7 Kf8 24.Bc6?? The backward pawn on b7 becomes a target (24.Ra1 Nd4+=) 24...Qe3?? (better is 24...bc6 25.Ra1 Qe3 26.Kh2 Qf4 27.Kg1 A) 27...Qg4? 28.Rf1 Kg7 29.Rf7 Kh6 30.Rf3+– (30.Re7?! Qg5+/–); B) 27...Qe3 28.Kf1 Qe4+=) 25.Bf3+= Bf6 (25...Bd4 A) 26.Qb7? g5 (26...Qe6?! 27.Qe4 Qf6 28.g5=) 27.Kh3 h5–+ (27...gf4?! 28.ef7 Kg7 29.Qe4=); B) 26.ef7 Kg7 27.Rd1+=) 26.ef7 Kf7 27.Qb7 h5 (27...g5 28.fg5 Bg5 29.Qd5 Kg7 30.Qc4+/–) 28.Qd5 (28.gh5 gh5 29.Qd5 e6 30.Qd7 Be7+=) 28...Kg7 (28...e6 29.Qd7 Be7 30.gh5 Rh5=) 29.gh5+– g5 30.Qf5 (30.Qe4 gf4 31.Kg4 Qe4 32.Be4 Be5+–) 30...gf4+/– 31.Kh2 (31.Qf4?? Be5 32.Qe5 Qe5 33.Kf2 Rd8–+) 31...Rh5?? (better is 31...Rg8+/–) 32.Qh5+– Qf2 (32...Qe5 33.Qh3+–) 33.Qg4 Kf8 34.Rb1 Bh4 (34...Qh4 35.Qh4 Bh4+–) 35.Rb8 Kf7 36.Qg8 Kf6 37.Rf8 Ke5 38.Qd5 1–0. dixi82 – willow27, ChessWorld.net, 2006.

4.e3 Nc6

5.Na3 Nf6 (5...Bd7 6.Nf3 Nf6 7.Nb5 e5 8.a4 e4 9.Ne5 Bb4; 5...Bf5 6.Nb5 Nf6 7.Nf3 Ne4 8.Nfd4 Nd4 9.Nd4 Bd7; 5...e5 6.Nb5 Bd7 7.a3 Nf6 8.Bc3 Ra6 9.Nf3 e4; 5...e6 6.Nb5 Nf6 7.Nf3 Be7 8.Bc3 Ra4 9.Bd3 0–0; 5...h5 6.Nf3 Nf6 7.Nb5 h4 8.h3 Ne4 9.Be2 e6; 5...Nb4 6.Nf3 Nf6 7.Nb5 Bf5 8.Nbd4 Bd7 9.Be2 e6) 6.Nf3 g6 7.Nb5 Bg7 8.Bc3 Ra6 9.Bd3 0–0.

5.a4 Nf6 (5...e6 6.Nf3 Nf6 7.Nc3 Bc5 8.Be2 0–0 9.0–0 Bd7) 6.Nf3 g6 7.c4 Bg7 8.cd5 Rd5 9.Nc3 Ra5.

5.Bc3 Ra8 6.Nf3 Nf6 7.Bb5 e6 8.Ne5 Bd7 9.Nd7 Qd7.

5.Nc3 Nf6 (5...e5 6.Nb5 Bd7 7.a3 Nf6 8.Bc3 Ra6 9.Nf3 e4) 6.Nf3 g6 7.d4 Bg7 8.Bd3 0–0 9.0–0 Nb4.

5.Nf3 Bd7 6.c4 dc4 7.Bc4 b5 8.Be2 Nf6 9.d4 Qa8.

5.Nf3 e6 6.Nc3 Nf6 7.Nb5 Be7 8.Bc3 Ra4 9.Bd3 0–0.

5.Nf3 Nf6 6.Bd3 g6 7.Nc3 Bg7 8.0–0 0–0 9.Nb5 Bf5.

5.Nf3 Bg4 6.Be2 e6 7.0–0 Bd6?? (7...Nf6 8.Nc3=) 8.a3?? (better is 8.Bg7 Bf3 9.Bf3+–) 8...Nf6+= 9.d4 0–0 10.Nbd2 Ne4 11.c4 Nd2 12.Nd2 Be2 13.Qe2 Ra4 14.c5 Be7 15.Bc3 e5 16.Qb5 Qa8 17.Rfb1 ed4–/+ 18.Bd4 Nd4 19.ed4 Ra3 20.Ra3+= Qa3 21.Qb7 Qd3 22.Nf3 Bf6 23.Qb3 Qf5 24.Re1 Qg4 25.h3 Qg6? 26.Qd5+– Rd8?? 27.Qc6 h6+– 28.Qc7 Qd3 29.c6 Qc3 30.Qb7 Rd4 31.Re8 Kh7 32.Nd4 Bd4?? 33.c7+– Qc1 34.Kh2 Bf2 35.Qe4 g6= 36.c8Q?? Qg1 0–1. ejdrzej (1765) – sting73 (1640), kurnik, 2011.

5.h3 Qd6 (5...Nf6 6.Nf3 Bf5 7.Bd3 e6 8.Nc3 Bc5 9.0–0 0–0; 5...Bf5 6.Nf3 Nf6 7.Bd3 e6 8.Bf5 ef5 9.0–0 Be7; 5...Bd7 6.Nf3 Nf6 7.Bd3 e6 8.0–0 Bc5 9.Nc3 0–0; 5...e5 6.Nf3 e4 7.Nd4 Nf6 8.Nc6 bc6 9.Bc3 Ra8) 6.Nf3 Nf6 7.a4 Qd8 8.Nc3 e6 9.Nb5 Bb4.

4.e3 Bf5

5.Nc3 Nc6 6.Nf3 Nf6 7.Bb5 Bd7 8.0–0 e6 9.Qe2 Bc5.

5.Nf3 Nc6 6.Nc3 d4 7.ed4 Nd4 8.Nd4 Qd4 9.Be2 Qb6.

5.Nf3 Nd7 6.Nd4 Bg6 7.Nc3 Ngf6 8.Be2 e5 9.Nb3 Ra8.

5.Nf3 e6 6.d3 (6.Be2 Nf6=) 6...c6 (6...Nf6 7.Be2=) 7.Be2 Ne7 8.0–0 Nd7 9.Nbd2 Nf6 10.c4 h5 (10...b6 11.cd5 cd5 12.Nb3+=) 11.cd5 Nfd5? (better is 11...cd5!? 12.Qb3 Qa8+=) 12.Nc4 (12.e4 Nf4 13.ef5 Nf5+–) 12...Ra8 (better is 12...Rb5 13.Nd4 Rb2 14.Nb2 Bg6+–) 13.Qb3?? (better is 13.e4+–) 13...b5+= 14.Ncd2 Nf6 15.e4 Bg6 (15...Bg4 16.a4+=) 16.Ne5 (16.a4 ba4 17.Ra4 Ra4 18.Qa4 h4+/–) 16...Ng4 17.Ng4 hg4 18.Bg4 Rc8 (18...Qa5 19.Qc2+/–) 19.Rac1 (19.a4 ba4 20.Ra4 Qd6+/–) 19...Ng8 20.Nf3 Bh5 21.Bh5 Rh5 22.h3 Bd6 (22...Nf6 23.Ne5 Qb6 24.a4+–) 23.Bg7+– Qc7 (23...Bf4 24.Rc3+–) 24.d4 Bf4 (24...Ra8 25.Be5+–) 25.Rc2 (25.Be5 Be5 26.Ne5 Ne7+–) 25...Bh6 (25...Qd7 26.Be5 Be5 27.de5+– (27.Ne5?! Qd4 28.Rc6 Rc6 29.Nc6 Qe4+/–)) 26.Be5 Qd7 27.Rfc1?? (27.g4 Rh3 28.Kg2 Rf3 29.Qf3 b4+–) 27...Ne7? (27...Bc1 28.Rc1 f6 29.Bf4+=) 28.Bf6?? (better is 28.Rd1+–) 28...Bc1 29.Ne5?? (better is 29.Rc1 Ng8 30.Be5+=) 29...Qd4–+ 30.Rc1 Qd6?? (better is 30...Re5!? 31.Qa3 c5–+) 31.Be7 (31.Rd1 Qb8 32.Rd7 Ng6 33.Ng6 Kd7 34.Qd1 Rd5 35.ed5 fg6 36.dc6 Kc6 37.Qf3 Kd7 38.Qd3 Kc6+=) 31...Qe7?? (31...Qe5!? 32.Ba3 Qe4–/+) 32.Nf3 (32.Qb5 cb5 33.Rc8 Qd8 34.Rd8 Kd8 35.f4= (worse is 35.Nf7 Ke7 36.g4 Rh3–/+)) 32...Rc5 33.Rc5 Qc5 34.Qd1 Rd8 35.Qe1 (better is 35.Qa1!?–/+) 35...Qc2–+ 36.a3?? (better is 36.Qe3–+) 36...Rd1 37.Kh2 (37.e5 c5 38.g4 Re1 39.Ne1 Qc3–+) 37...Re1 38.Ne1 Qe4 39.Nf3 Qa4 40.g3 Qa3 41.Ng5 (41.Kg2 b4 42.h4 Qd3–+) 41...b4 0–1. Fournier,Frederic (1920) – coelophisys (1810), Active ajedrez21.com, 2004.

5.Nf3 Nf6 6.Bd3 (6.Bf6 gf6 7.Nd4 Bg6 8.Nc3 e5 9.Nb3 Ra8) 6...Bd3 7.cd3 e6 (7...Nbd7 8.Bf6 ef6 9.0–0 Bd6) 8.0–0 (8.Qb3 Nbd7 9.Qb7 Bd6) 8...Bd6 9.Nc3 Nc6 (9...Nbd7+=) 10.e4 0–0 11.ed5 ed5 12.Ne2 d4 13.Ned4 Nb8 14.Bc3 Rd5 15.a4 Re8 16.Rb1 Qc8 17.Nb5 Bc5 18.d4 Be7 19.Re1 (better is 19.Na7 Qd8 20.Rb7+/–) 19...Kh8?? (19...c6 20.Na7 Qd7 21.a5=) 20.Ne5 (20.Na7 Qd8 21.Rb7+–) 20...g6? (better is 20...c6!? 21.Na7 Qc7+=) 21.Nf7 Kg8? (21...Kg7 22.Ne5 c6 23.Na7+/–) 22.Ne5 (22.Na7 Qd7 23.Ne5 Qd8 24.Rb7 Bd6+–) 22...Kh8? (better is 22...c6 23.Na7 Qc7+–) 23.Ng6 (better is 23.Na7 Qf5 24.Rb7+–) 23...hg6= 24.Qf3 Nc6 (better is 24...Qd7+=) 25.Qd5?? (better is 25.Re7 Re7 26.Qf6 Rg7 27.Re1+=) 25...Nd5–+ 26.Na3 (26.f3 Qd7–+) 26...Nc3 (better is 26...Ba3!? 27.Re3–+) 27.dc3 Nd4 (better is 27...Ba3 28.h3–+) 28.cd4 Kh7 (better is 28...Ba3 29.Rf1 Re4–+) 29.Nc4 c6 (29...Qd7!? 30.Ne3 b6 31.Rbc1–+) 30.Ne5 Qc7 31.Re3 Kh6 (better is 31...Ra8!? 32.Ra1–+) 32.Rh3 Kg7 33.Rg3 g5 34.Re1? (34.Rgb3 Qa5 35.Rb7 Qa4 36.Rd7–+) 34...Kh6 (better is 34...Ra8–+) 35.Nf7?? (35.Rh3 Kg7 36.Rg3 Qa5–+) 35...Kh5?? (35...Kg6 36.Ng5 Qb8 37.Ne4 Kf5 38.Rf3 Kg6 39.Rg3 Kh6 40.Rh3 Kg7 41.Rg3 Kf8 42.Rf3 Kg8 43.Rg3 Kf7 44.Rf3 Kg6 45.Rg3=) 36.Rh3 (better is 36.Re6 Bf6 37.Rh3 Kg6 38.Ne5 Qe5 39.Re5 (39.de5? Re6 40.f4 Bd8–+) 39...Be5 40.de5 Re5 41.Kf1+=) 36...Kg4?? (better is 36...Kg6 37.Ne5 Kf6 38.Rf3 Ke6 39.Ng6 Kd7+=) 37.Re4 (37.Nh6 Kf4 38.Rf3) 37...Kf5–+ 38.Ree3? (38.Rhe3 Kg6 39.Ne5 Kg7 40.Nf3–+) 38...Kg4 (better is 38...Kg6 39.Ne5 Kg7–+) 39.Nh6 Kf4 40.Rhf3 1–0. AArow – Duffer, ICS game chess.net, 1998.

3.Bb2 e5

4.Bc3 Ra8 5.Be5+= Nc6 6.Bb2 d5 7.g3 (7.e3 Nf6+=) 7...Nf6= 8.Bg2 Bc5 9.d3 d4 10.Nd2 0–0 (10...Nd5 11.Ngf3=) 11.Ngf3 (11.Bc6 bc6 12.c3 Re8+=) 11...Bg4 12.0–0 Qd7 13.Ng5 (13.c3 dc3 14.Bc3 Nd5+=) 13...h6 (13...Rfe8 14.Nge4 Ne4 15.Ne4=) 14.Nge4 Ne4 15.Ne4 Bb6 16.c4 f5 (16...Rfe8 17.Qc2=) 17.Nd2 (17.h3 Bh5 18.Nd2 Rfe8+=) 17...Rfe8 (17...f4 18.Ne4+=) 18.Re1+= Nb4 (18...f4!?+=) 19.Qb3+– Ba5 (better 19...Bc5+–) 20.Nf3 (better 20.c5 Qf7 21.Nc4 Nd3 22.Qd3 Be1 23.Re1+–) 20...c5= 21.Bc1 (21.h3 Bh5=) 21...Bf3 (21...Nd3 22.Qd3 Bf3 23.Bf3 Be1 24.Bb2–/+) 22.Bf3=+ Na2 (22...Nc2 23.Qc2 Be1 24.Rb1=+) 23.Rf1= The backward pawn on b7 becomes a target 23...Nc1 24.Rac1 Bb4 25.Ra1 g5 (25...Kh7 26.Rfb1=) 26.Bh5 Reb8 27.Bf3 g4 28.Bd5 Kg7 (28...Kh8 29.Ra8 Ra8 30.e3=) 29.Qc2 (29.e3 Ra1 30.Ra1 Qd6+=) 29...Bc3 (29...Ra6 30.e3=) 30.Ra8+= Ra8 31.Qc1 (31.Rb1 Ra7+=) 31...Ra2= 32.Qf4 (32.e4 fe4 33.Be4 Qf7=) 32...Re2=+ 33.h3 (better 33.f3 Bd2 34.Qb8=+) 33...Qe7?? (better 33...gh3 34.Rb1 Bb4=+) 34.Qf5+– gh3 35.Qg4 (35.Qg4 Kf6 36.Be4 Re4 37.de4+– (worse 37.Qe4 Qe4 38.de4 Ke5–/+)) 1–0. JUANKARODA (1805) – gunchess52 (1810), lichess.org, 2020.

4.Bc3 Rc5= 5.Bb4 Rb5 6.Bf8 Kf8 7.Nf3 Nf6 8.Nc3 Ra5 =.

4.d3 Bb4 5.Nd2 Nf6 6.Ngf3 0–0 (6...d6!?=+) 7.Ne5 d5 8.a3 Bd6 9.Nef3 Nc6 10.e3 Re8 11.Be2 Ne5 (11...Qe7 12.Qc1=) 12.0–0 c5 (12...Nf3!? 13.Bf3 Bf5+=) 13.c4 Nf3 14.Bf3 (14.gf3?! d4 15.Nb3 Ra7=+) 14...d4 (14...Be6 15.Rb1+–) 15.ed4 cd4 16.h3 (16.Nb3 Ra6+–) 16...Bf4 (16...Bc7!? 17.Nb3 Qd6+–) 17.Nb3+– Rg5 18.Kh1 (18.h4 Rge5+–) 18...Bb8 19.Nd4 Qd6 (19...Bh3 20.Re1+– (20.gh3?? Qd6 21.Bb7 Qh2; 20.Bb7 Qc7 21.g3 Qb7 22.Nf3 Bg4–+)) 20.g3 Bh3 21.Bg2?? (better 21.Re1+–) 21...Rg3! 22.fg3 (22.fg3 Qg3 Mate attack) 22...Qg3 23.Nf3 (23.Rf6 Qg2) 23…Qg2 0–1. amirgloo (1895) – Mandestiny (1885), lichess.org, 2020.

4.e3 Bb4 5.a3 Be7 6.d4 Nc6 7.d5 Na7 8.Bc3 Ra4 9.Be5 Nf6 10.d6 Bd6 11.Bd6 cd6 12.Qd6 Nc6 13.Bd3 Ne4 14.Be4 Re4 15.Nf3 Qe7 16.Qe7 Re7 17.0–0 0–0 18.Nc3 d6 19.Rfd1 Rd8 20.Nd5 Re4 21.Nd4 Nd4 22.ed4 Re2 23.Ne3 Re8 24.Kf1 R8e3 25.fe3 Re3 26.Re1 Re1 27.Re1 Bg4 28.Re8 1–0. Bonetti,Shane – LendaFan, ICC, 2002.

4.e3 Nc6 5.Nf3 Ra8 (better is 5...e4!? 6.Nd4 Nf6+=) 6.Ne5+= d6 7.Nc6 bc6 8.Bc4 Nf6 9.Qf3 Be7 (9...d5 10.Bf6 gf6 11.Bd3+/–) 10.Qc6 Bd7 11.Qf3 0–0 12.0–0 Be6 13.Bb3 Rb8 14.Nc3 Bb3 (better is 14...d5!?+/–) 15.ab3+– h6 16.Qg3 Nh7 17.Ne4 Bh4?? (17...Nf6+–) 18.Qg7 1–0. lidl4 – 09phypeach, Live Game Caissa's Web, 2004.

4.e4 d5 5.Bc3 Ra8= 6.Qh5 de4 7.Qe5 Qe7 8.Bc4 c6 =.

4.e4 d5 5.Nc3 c6 (5...d4 6.Nce2–/+ Nf6 7.Ng3 Be7 8.Nf3 0–0+=) 6.Nf3 (6.ed5 cd5 A) 7.Nf3 Nc6+= (7...d4 8.Nb5 Bd7=) 8.Nb5 Bg4+=; B) 7.Bb5 Nc6 8.Qe2 Nge7=) 6...Bd6 (6...d4 7.Ne2+= Nf6 8.Ng3 h5+=) 7.d3 (7.ed5!? cd5 8.Nb5= Nc6=) 7...Nf6 (7...d4 8.Nb1 Qb6–/+) 8.ed5 cd5 9.Qe2 (9.d4 e4 10.Nd2 0–0+=) 9...Nc6 10.h3 (10.Nb1 0–0–/+) 10...0–0–+ 11.g4 Re8 12.Bg2? (better is 12.Qd2–+) 12...e4 13.de4 Ne4 (13...de4?! 14.Nd2 Nd4 15.Qd1–/+) 14.0–0 (14.Nd1 Ng3! 15.fg3 Bg3 (worse is 15...Re2 16.Ke2 Bg3 17.Ne3–+) 16.Kf1 Re2 17.Ke2 Qe7 18.Kf1 b6–+) 14...Nc3 15.Bc3 (15.Qd3 Ne2 16.Kh1–+) 15...Re2 16.Ba5 Qa5 17.a3 (17.Rfe1 Re1 18.Ne1 Qd2–+) 17...Ne5 (17...Rc2!? 18.a4–+) 18.Ne5 (18.Nd4 Re4 19.Be4 de4–+) 18...Be5 19.Rad1 Be6 20.a4 (20.c4 dc4 21.a4 Bc7–+) 20...g6 (20...Qa4 21.Rfe1 Qc2 22.Re2 Qe2 23.Rf1–+) 21.f4 (21.c4 Qa4 22.Bd5 Bd5 23.Rd5 Qc4 24.Re5 Re5–+) 21...Qc5 22.Kh1 Bc7 23.f5 Qd6 0–1. dennism (2100) – kode (2345), net–chess.com, 2008.

4.e4 d5 5.ed5 Rd5 6.Nc3 (6.Bc4 Rc5 (6...Nc6 7.Bd5 Qd5 8.Nf3 Qb5 9.Qc1 Nf6 10.a4 Qa5) 7.Na3 Nc6 8.Nf3 Nf6 9.Qe2 Be7 10.d3 0–0) 6...Ra5 (6...Rc5 7.Nf3 Nf6 8.Bb5 Bd7 9.Qe2 Be7 10.a4 0–0; 6...Rd7 7.Nf3 Nc6 8.Bc4 Nf6 9.0–0 Bc5 10.Qe2 0–0) 7.Nf3 Nf6 8.Bb5 Nbd7 9.Qe2 c6 10.Bc4 Bd6. Bonny – kii, internet, 2006.

4.e4 d5 5.ed5 Nf6 A) 6.Nf3 Bd6 (6...Nd5 7.Ne5 Qe7 8.Qe2 Nf4 9.Qe4 Ng6 10.d4 f6; 6...e4 7.Ne5 Rd5 8.Bc4 Re5 9.Be5 Ng4 10.Bg3 Qd4) 7.Nc3 0–0 8.Bc4 c6 9.dc6 e4 10.Nd4 Nc6; B) 6.Bc4 Nd5 (6...b5 7.Bd3 Nd5 8.Nf3 Nf4 9.Be5 Nd3 10.cd3 f6; 6...c6 7.Be5 cd5 8.Qe2 Be7 9.Bd3 Nc6 10.Nf3 d4; 6...Bd6 7.Nf3 0–0 8.0–0 Nd5 9.Nc3 Nf4 10.Ne2 Qf6) 7.Nf3 Nc6 8.0–0 Bd6 9.Nc3 Nf4 10.d4 0–0; C) 6.c4 Bc5 (6...Bd6 7.Nf3 0–0 8.Be2 c6 9.Nc3 cd5 10.cd5 Nd5; 6...c6 7.Nf3 cd5 8.cd5 Nd5 9.Ne5 Nc6 10.Nc4 Rc5) 7.Nc3 0–0 8.Bd3 e4 9.Bc2 Nbd7 10.Na4 Bd6.

4.g3 Ba3?? 5.Na3+– Qf6 (5...d6 6.d4 e4 7.Nc4+–) 6.Nc4 (6.f4 Qc6 7.Nf3 d6+–) 6...Rb5 (6...Qc6 7.Na5 Qh1 8.Be5+–) 7.Be5 (better 7.e4+–) 7...Qe6 (7...Re5 8.Ne5 Qe5 9.Nf3+–) 8.d3 (better 8.Bg7 Qc4 9.Bh8+–) 8...Re5 9.Ne5 Qe5 10.Bg2 (10.d4 Qe7+–) 10...Qc3 11.Kf1 Nf6 12.Nf3 0–0 13.Bh3 Nc6 14.Kg2 d5 15.Bc8 Rc8 16.Qd2 Qa3 17.Rhb1 Re8? (17...b6+–) 18.Rb7 Ng4 (18...d4 19.e4+–) 19.Rc7 Qa8 (19...Qb2 20.Qf4 (worse 20.Rc6 Qa1 21.c4 Nf6+–) 20...Nge5 21.Ne5 Ne5 22.Rd1+–) 20.Qf4 Nce5 (20...Nf6 21.e3+–) 21.Ne5 (21.d4 Qb8 22.Rc5 Nf3 23.Qb8 Rb8 24.Kf3 Nf6+–) 21...Ne5 22.d4 f6 (22...Qd8 23.Rb7 Nd7+–) 23.de5 Re5 24.Qg4 Rg5 (24...d4 25.Kg1 Qf8+–) 25.Qd7 (25.Qe6 Kh8 26.Rc8 Qc8 27.Qc8) 25...d4 26.f3 Re5 27.Rc8 (27.Qg7) 27...Qc8+– 28.Qc8 Kf7 29.Qd7 Kg6 30.Qd4 (30.Rb1 Re2 31.Kh3 Re3 32.Rb7 Re5 33.Qg7 Kf5 34.Qg4) 30...Re2 31.Kh3 Rc2 32.Qe4 f5 33.Qc2 (33.Qc2 Kf7 34.Qf5 Kg8 35.Rd1 g5 36.Qe6 Kg7 37.Rd7 Kf8 38.Qf7; 33.Qe6 Kh5 34.g4 fg4 35.fg4 Kg5 36.Qf5 Kh6 37.Qh5) 1–0. JUANKARODA (1790) – Mukate (1775), lichess.org, 2020.

4.e4 Nc6

5.Nc3 A) 5...Bc5 6.Nf3 Nf6 (6...d6 7.Bc4 Nf6 8.0–0 0–0 9.h3 h6 10.a4 Bd7; 6...h6 7.Bc4 Nf6 8.0–0 0–0 9.Qe2 d6 10.Nd5 Nd5) 7.Bc4 0–0 8.0–0 d6 9.h3 h6 10.a4 Bd7; B) 5...h6 B1) 6.Bc4 Bc5 (6...Nf6 7.Nf3 Bc5 8.0–0 0–0 9.Qe2 d6 10.Nd5 Nd5) 7.Nf3 Nf6 8.0–0 0–0 9.Qe2 d6 10.Nd5 Nd5; B2) 6.Bb5 Nf6 (6...Bc5 7.Nf3 Nf6 8.0–0 0–0 9.h3 Nd4 10.Bc4 Re8; 6...Nd4 7.Bd3 Qg5 8.g3 Nf6 9.Nf3 Nf3 10.Qf3 c6; 6...Bb4 7.a4 Nf6 8.Nf3 0–0 9.0–0 Bc5 10.Ne5 Ne5) 7.Nf3 Bc5 8.0–0 0–0 9.Bc6 dc6 10.Ne5 Bd4; B3) 6.Nf3 Nf6 (6...Bc5 7.Bc4 Nf6 8.0–0 0–0 9.Qe2 d6 10.Nd5 Nd5) 7.Bc4 Bc5 8.Qe2 d6 9.Nd5 0–0 10.0–0 Nd5; C) 5...Nf6 6.Nf3 (6.Bd3 Bc5 7.Nf3 d6 8.0–0 0–0 9.Nd5 Bd7 10.Qe2 Nd5) 6...Bc5 7.Bc4 0–0 8.0–0 d6 9.h3 h6 10.a4 Bd7.

5.Bd3 A) 5...Nf6 A1) 6.Nc3 Bc5 (6...Bb4 7.a3 Bc5 8.Nf3 0–0 9.0–0 d6 10.Nd5 h6) 7.Nf3 0–0 8.0–0 d6 9.Nd5 Bd7 10.a3 Nd5; A2) 6.Nf3 Bc5 7.Ne5 Bf2 8.Kf2 Ne5 9.Be5 Re5 10.Nc3 d5; B) 5...Bb4 B1) 6.a3 Bc5 (6...Be7 7.Nf3 Nf6 8.0–0 0–0 9.Bc3 Ra4 10.Be5 Ne5) 7.Nf3 Nf6 8.Nc3 0–0 9.0–0 d6 10.Nd5 Be6; B2) 6.Nc3 Nf6 (6...d6 7.Nf3 Nf6 8.0–0 0–0 9.a3 Bc5 10.Nd5 Be6; 6...Bc5 7.Nf3 Nf6 8.0–0 0–0 9.Nd5 d6 10.a3 Be6; 6...Nge7 7.Nf3 0–0 8.0–0 d5 9.a3 Bc5 10.ed5 Nd5; 6...h6 7.Nf3 Nf6 8.0–0 d6 9.Qe2 Be6 10.Bc4 0–0) 7.Nf3 0–0 8.a3 Bc5 9.0–0 d6 10.Nd5 Be6; B3) 6.Qe2 Nf6 (6...d6 7.Nf3 Nf6 8.Nc3 Bg4 9.Nd5 Nd5 10.ed5 Rd5; 6...Nge7 7.Nf3 Ng6 8.g3 d6 9.a3 Bc5 10.Nc3 Bh3; 6...Bc5 7.Nf3 d6 8.Nc3 Nf6 9.0–0 Nb4 10.Bb5 Bd7; 6...h5 7.Nf3 Nf6 8.Nc3 d6 9.h3 0–0 10.0–0 Be6) 7.Nf3 0–0 8.Nc3 d6 9.0–0 Be6 10.Bc4 h6; B4) 6.Nf3 Nf6 (6...d6 7.Nc3 Nf6 8.0–0 0–0 9.a3 Bc5 10.Nd5 Be6) 7.0–0 d6 8.Nc3 0–0 9.a3 Bc5 10.Nd5 Be6; C) 5...Qg5 C1) 6.g3 Qh6 (6...Nf6 7.Nf3 Qg4 8.Nc3 Bc5 9.0–0 0–0 10.Qe2 d6; 6...Bc5 7.Nf3 Qe7 8.Nc3 Nf6 9.0–0 d6 10.Nd5 Nd5) 7.Nf3 Nf6 8.Nc3 Bc5 9.0–0 0–0 10.Nd5 d6; C2) 6.Nf3 Qg2 7.Rg1 Qh3 8.Nc3 Nf6 9.Nb5 d6 10.Qe2 Kd8; D) 5...Bc5 D1) 6.Nc3 Nf6 (6...d6 7.Nf3 Nf6 8.Nd5 Nd5 9.ed5 Nb4 10.Bc3 Nd3) 7.Nf3 0–0 8.0–0 d6 9.Nd5 g6 10.Bc3 Ra4; D2) 6.Nf3 Nf6 (6...d6 7.Nc3 Nf6 8.0–0 0–0 9.Nd5 Re8 10.Bc3 Ra4) 7.Nc3 0–0 8.0–0 d6 9.Nd5 Bd7 10.Bc3 Ra4.

5.Nf3 Bc5 6.Ne5 Nf6 7.Nc6 dc6 8.d4 Bb6 9.f3 0–0 10.c4 Re8.

5.Nf3 Nf6

6.Nc3 Bc5+= 7.Bc4 0–0 8.0–0 d6 9.h3 Bd7 10.Re1 h6.

6.Nc3 Bc5 7.Ne5 Ne5 8.d4 Bd6 +=.

6.Nc3 d5 7.ed5 Nd5 8.Bc4 Nb6 9.Bd3 f5 10.Bb5 Bd6.

6.d3 Bb4 7.Nbd2+= Qe7 8.Be2 0–0 9.0–0 d5 10.c3 Ba3.

6.d3 d5 7.Nbd2 Bd6 8.Be2 0–0 9.0–0 Re8 10.a4 Qe7.

6.d3 d6 7.Be2 (7.Nbd2 Be6 8.d4 ed4 9.Nd4 Nd4 10.Bd4 Be7) 7...Be7 8.Nbd2 (8.0–0 0–0 9.Qd2 h6 10.c4 Bg4) 8...0–0 9.0–0 h6 (9...Be6 10.Ng5 Ba2) 10.c3 (10.d4 ed4 11.Nd4 Nd4 12.Bd4 Be6=) 10...d5+= 11.Nb3 Ra8 12.ed5 Nd5 (better is 12...Qd5!? 13.c4 Qd6+=) 13.c4+= Nf4 14.Ne5 Ne5 15.Be5 Ne2 (15...Bd6 16.Bf4 Bf4 17.Bf3+=) 16.Qe2 Bf5 (16...Bb4 17.d4+=) 17.d4+/– Re8 (17...Qd7!?+/–) 18.Qf3+– Bg6 19.Rad1 (better is 19.Qb7!? Bd6 20.Rfe1+–) 19...Ra2+= 20.Qg3 (20.Qb7 Bc2 21.Nc1 Ra4+=) 20...Ra3 (20...Bh4 21.Qg4=) 21.Bc7 (21.Ra1!? Ra1 22.Ra1=) 21...Qc8+= 22.c5? (better is 22.Ra1 Rb3 23.Qb3 Qc7 24.Rfe1+=) 22...Bc2–+ 23.Be5 (23.Rde1 A) 23...Bb3?! 24.Be5 Bg5 25.f4 Re5 26.fe5+= (worse is 26.Re5 Bf6–/+); B) 23...Rb3 24.Qe5 Kf8–+) 23...f6 24.Bd6 (24.Rd2 Rb3 25.Rc2 Rg3 26.Bg3–+) 24...Rb3 (worse is 24...Bb3 25.Be7 Bd1 26.Qa3+/–) 25.Qh3 (25.f3 Bd1 26.Be7 Re7 27.Rd1–+) 25...Rh3 (25...Rh3 26.gh3 Bd6–+) 0–1. macedon (2065) – kode (2345), net–chess.com, 2008.

6.d3 Be7 7.Nbd2 d5 8.Be2 0–0 9.0–0 Ba3 10.Ba3 Ra3.

6.Bd3 Bb4 7.a3 Bc5 8.0–0 0–0 9.Ne5 Ne5 10.Be5 Bf2.

6.Bd3 Bc5 7.Nc3 0–0 8.0–0 d6 9.Nd5 Bd7 10.c3 Nd5.

3.Bb2 e6

4.e3 f5 5.Be2 Nf6 6.Bh5 Nh5 7.Qh5 g6 8.Qh3 e5 9.Nf3 d6 10.g3 Bg7 11.Nc3 0–0 12.0–0 e4 13.Nd4 Bd4 14.ed4 f4 15.Qg2 f3 16.Qh1 d5 17.d3 Bh3 18.de4 Bg2 19.ed5 Bh1 20.Kh1 Qd7 21.Rae1 Qh3 22.Rg1 Nd7 23.d6 Rh5 24.Re3 Qh2 0–1. sunnyda – odcd, kurnik, 2012

4.e3 Nf6 5.Be2 d5 6.Nf3 Be7 7.Bc3 (7.0–0 0–0=) 7...Ra8=+ 8.0–0 0–0 9.d4 Nbd7 10.Bd2 c5 11.c4 cd4 12.Nd4 dc4 13.Bc4 Nb6 14.Bb3 Nbd5 15.Nc3 Nc3 16.Bc3 Nd5 17.Bb2 Ba3 18.Qc1 Bb2 19.Qb2 Qf6 20.Rad1 Ne7 21.Qe2 (21.Rd2 Ra6+=) 21...Nf5 (21...b6 22.Rd2=) 22.Qg4 Nd4 23.Rd4?? (better 23.Qd4 Qg5 24.Qe4+=) 23...e5–+ 24.Qf3?? (better 24.Rd7–+) 24...Qf3 (worse 24...ed4 25.Qf6 gf6 26.ed4–+) 25.gf3 ed4 26.e4 (26.ed4 Rd8 27.Rd1 Ra6–+) 26...Bh3 (26...Rd8 27.Rd1–+) 27.Rd1 Rfd8 28.Bd5 (28.f4 Be6 29.Rd3 b5 30.Be6 fe6–+) 28...d3! 29.Rd3 (29.f4 Ra3–+) 29...Ra5 (29...Ra2 30.Rd1 Rd6 31.Kh1–+) 30.a3 (30.f4 Be6 31.f5 Bd5 32.f6–+) 30...Rc5 31.Rd1 Be6 (better 31...Rdc8 32.f4 Rc1 33.Bb3–+) 32.f4 Bd5 33.ed5 (33.f5 Rd7 34.ed5 Rcd5–+) 33...Rdd5 (33...Rcd5!? 34.Rf1–+) 34.Re1 Rc8 35.Re7 Rcd8 36.Rb7 Rd1 37.Kg2 1–0. anotherheaven (1715) – Rafael_Federer (1640), lichess.org, 2015.

4.e3 Nf6 5.Nf3 b6 6.Be2 Bb7 7.0–0 Be7 8.c4 Nc6 9.Nc3 0–0 10.d4 Qa8 11.Qc2 Bb4 (11...Nb4 12.Qb1=) 12.a3 Be7 13.Nb5 Bd8 (13...Na7 14.a4=) 14.Bd3 (14.Bc3 Ra4+=) 14...Ne7 (14...Na7 15.Bc3 Ra6 16.d5 Nb5 17.cb5 Ra3 18.Ra3 Qa3 19.de6 fe6 20.Bf6 Bf6 21.Bh7 Kh8 22.Be4=) 15.Be2 (15.d5 Ng6 16.Bc3 Ra6+=) 15...Ng6 (15...Nf5 16.d5=) 16.Bc3 (16.d5 ed5 17.Bc3 Ra4+=) 16...Ra4= 17.Bb4 White intends c5 17...d6 18.Bd1? (better is 18.Nc3 Ra7 19.c5 bc5 20.dc5 Bf3 21.Bf3+=) 18...Re8?? (better is 18...Rb4 19.Ra2 Rb5 20.cb5 Be7–+) 19.Qa4+– Bf3 20.Qa8 (better is 20.gf3 Qb8 21.Qa7 Qa7 22.Na7+–) 20...Ba8 21.c5 (21.Bc2 Bc6+–) 21...bc5 22.dc5 Bc6 (22...dc5 23.Bc5 Ne4 24.Rc1 Nc5 25.Rc5+–) 23.Nd4 dc5 24.Bc5 Bd5 (24...Bd7 25.Bc2+–) 25.Ba4 c6 26.Bc6 Bc6 27.Nc6 Bc7 28.Rfd1 Nd5 29.a4 Ra8 30.a5 h6 (30...Ra6 31.Nb4 Nb4 32.Bb4+–) 31.a6 Kh7 (31...Ne5 32.Ne5 Be5 33.Bd4 Bd4 34.Rd4+–) 32.a7 (32.f4 Nf8+–) 32...Nf6 (32...Ne5 33.Ne7 Nc3 34.Rd2+–) 33.Rdb1 (33.Bd6 Bb6+–) 33...Ne4 34.Bd4 Nd2 (34...e5 35.Bb6 Bd6 36.Rd1+–) 35.Rb7 Bd6 36.Rf7 Nb3 (36...e5 37.Rd7 ed4 38.Rd6+–) 37.Rb1 (better is 37.Rg7 Kh8 38.Rg6 Nd4 39.ed4+–) 37...Nd4 38.ed4 e5 (38...Ne7 39.Re7 Be7 40.Rb8 Ra7 41.Na7+–) 39.de5 (better is 39.Rbb7 h5 40.Rg7 Kh6 41.Rh7 Kg5+–) 39...Ne5 40.Ne5 Be5 41.Rfb7 (41.Rb6 Bd4 42.Ra6 Bc3+–) 41...Bf4 (41...Bd4+–) 42.g3 Be5 43.f4 (43.Rd7 Kg6+–) 43...Bd6 (43...Bd4 44.Kg2 Ra7 45.Ra7 Ba7 46.f5+–) 44.Kf2 (better is 44.R1b5+–) 44...Bc5 45.Kf3 Ba7 (45...Ra7 46.Ra7 Ba7+–) 46.Ra1 Kg6 47.Raa7 Rg8 1–0. Fournier,Frederic (2020) – misterfreeze (1890), Active, 2004.

4.Nf3 c5 5.e3 f6 6.Nc3 h5 (6...d5 7.Be2=) 7.Bd3 d5 8.Nh4 Ne7 9.a4 (9.0–0 Kf7+=) 9...c4 10.Be2 d4 (10...Rh6!?=) 11.Nb5+/– d3? (better is 11...g5!? 12.Bh5 Kd7+–) 12.Bh5 Kd7 13.cd3 cd3 (13...Rh6 14.dc4 g6 15.Ra3+–) 14.0–0 (14.Ra3 Nd5 15.Rd3 Na6+–) 14...Nf5? (better is 14...Nd5+–) 15.Nf5 ef5 16.Qb3 Nc6 (16...Rh5 17.Qf7 Qe7 18.Qh5 Kd8+–) 17.Qd5 Ke7 (17...Bd6 18.Qd6) 18.Qf7 1–0. Fritz 11 – harrierhawk, internet, 2014.

4.Nf3 Nc6 5.e4 d6 (5...e5 6.Bc4=) 6.Be2 Nf6 7.d3 Be7 8.Nbd2 b6 9.0–0 0–0 10.Nb3 Ra8 11.c4 e5 12.Qc2 Na5 (12...Bb7 13.Nfd2=) 13.a3 (13.d4 Bb7 14.d5 c6=) 13...c5 (13...Nb3 14.Qb3 Re8 15.Rfb1=) 14.Qc3 (14.Na5 Ra5 15.Nd2 Qc7=) 14...Nc6 15.h3 Nd4 16.Nfd4 cd4 17.Qd2 (17.Qe1 Be6=) 17...h6 (17...Be6 18.Qd1=+) 18.f4 Nh7 (18...Be6 19.Bf3=) 19.f5 (19.Qe1 Bh4 20.Qb4 Be7=) 19...Bg5= 20.Qe1 Be3 21.Kh1 Bd7 22.Bc1 Bc1 23.Nc1 b5 24.cb5 Bb5 25.Qg3 Nf6 26.Qf3 (26.Nb3 Re8=+) 26...Bc6 27.g4? (better 27.Nb3!?–/+) 27...d5–+ 28.h4? (28.Qg3–+) 28...de4 29.Qg3 White prepares the advance g5 29...ed3 30.Bf3 e4 31.Bg2 Qe7 (31...Re8!? 32.g5 hg5 33.hg5–+) 32.g5 hg5 33.hg5 Nh7 34.f6 Qc5 35.fg7 Rfe8 (35...Kg7 36.Qf4 Rae8 37.Nb3–+) 36.g6 (36.Qc7 Qc4–+) 36...fg6 (36...Qh5 37.Kg1 Qg6 38.Qg6 fg6 39.Nd3 Kg7–+ (worse 39...ed3 40.Bc6 Ng5 41.Rad1+=)) 37.Qg6 e3?? (better 37...Bd5–+) 38.Bc6 (38.Qf7) 38...e2 (38...Qc4 39.Nd3 e2+–) 39.Rf8! Rf8 (39...Rf8 40.gf8Q Double attack; 39...Nf8 40.gf8Q Double attack (40.Be8 Zwischenzug)) 40.gf8Q (better 40.gf8R Kf8 41.Nd3 Qe7 42.Ba8 Nf6+–) 40...Kf8 41.Nd3 Qa7 (41...Qg5 42.Qg5 Ng5 43.Ba8 Ke7+–) 42.Qf5 (42.Qf5 Qf7 43.Qf7 Kf7 44.Ba8+–) 1–0. Adjailton (1800) – KLINGON09 (1795), lichess.org, 2019.

4.Nf3 Nf6 5.c4 g6 (5...d5 6.e3=+) 6.e3 Bg7 7.Be2 0–0 8.0–0 b6 9.Nc3 (9.d4 Bb7=) 9...Bb7 (9...d5 10.d4=) 10.Nb5 c6 (10...d6 11.d4=) 11.Nd6+= Qc7 12.Be5?? (better 12.Nb7 Qb7 13.Bc3+=) 12...Ne8?? (better 12...Re5 13.Ne5 Qd6–+) 13.Ne8+– Qd8 14.Ng7 f6 15.Bc3 (15.Bd6 Kg7 16.Bf8 Kf8+–) 15...Ra8 16.Ne6 de6 17.Qb3 c5 18.d4 Bf3 (18...Nd7 19.Rfd1+–) 19.Bf3 Ra7 20.dc5 (20.Rfd1 Nd7+–) 20...bc5 21.Qb6 (better 21.Rfb1+–) 21...Qb6–+ 22.Rab1 (22.Rfb1 Qa6 23.Bf6 Nd7–+) 22...Qd6 23.Rfd1 Qe7 (23...Qa6 24.Rdc1–+) 24.Rb2 e5 (24...Ra4 25.Rb7 Qe8 26.Rdb1 Rc4 27.R1b3–+) 25.Rdb1 (25.Bd5 Kg7–+) 25...e4 26.Bd1 Ra8 (26...Nc6 27.a4–+) 27.Rb7 Qe6 28.a4 Qc4 (better 28...Rd8–+) 29.Bb3+= Qb3 30.R7b3 (30.R1b3 Rd8 31.f3 Nd7+=) 30...Nc6= 31.Kf1 (better 31.Ra3!?=) 31...Ra4–/+ 32.Rb6 Rc8 (32...Ne5!?–/+) 33.Bf6 (33.Rb7 Nd8 34.Rb8 Ra8 35.Ra8 Ra8 36.Bf6 Ne6=) 33...Kf7=+ 34.Bc3 Nb4 (better 34...Ke6!?=) 35.Bb4+– cb4 36.R6b4 (36.R1b4?! Rc1 37.Ke2 Rc2 38.Kd1 Rb4 39.Rb4 Rf2 40.Re4 Rg2=) 36...Rb4 37.Rb4 Rc1 38.Ke2 Ke6? (better 38...Rc2!? 39.Ke1 Rc1 40.Kd2 Rh1+–) 39.Re4+– Kd5 40.Rd4 Kc5 (40...Ke6 41.f4+–) 41.Rd7 h5 (41...Rg1 42.g3 Rb1 43.Rh7+–) 42.Rg7 (better 42.Rc7 Kd5 43.Rc1+–) 42...Rc2 43.Kf3 Kd5 (43...Kb4 44.Rg6 Rc7 45.Kg3+–) 44.Rg6 Ke5 (44...h4 45.Rh6+–) 45.Rg5 Kf6 46.Rh5 Kg6 47.Rh4 (47.g4 Kg7+–) 47...Ra2 (47...Rc7 48.e4+–) 48.Rg4 Kf6 49.h4 Kf7 50.h5 Ra6 (50...Ra8 51.Rh4+–) 51.g3 Rh6 (51...Ra5 52.Rf4 Ke6 53.g4+–) 52.Rf4 Ke6 53.g4 Ke5 (53...Rh8 54.Rb4+–) 54.Rf5 Kd6 55.e4 Rh8 (55...Ke7 56.Ke3+–) 56.Rf6 (56.e5 Kd5+–) 56...Ke7 (56...Ke5 57.Rb6 Rc8 58.Rb5 Kd6 59.g5+–) 57.e5 Rf8 (57...Rh7+–) 58.Rf8 Kf8 59.Kf4 Ke7 60.Kg5 Ke6 61.h6 Ke5 62.h7 Ke4 63.h8B (better 63.f4 Ke3+–) 63...Kf3 64.Kh5 Kf4 65.g5 Kf3 66.Bd4 Ke4 67.Be3 Kd3 68.g6 Ke2 (68...Kc4 69.g7 Kb3 70.g8Q Kb4 71.Qg4 Kb5 72.Qd7 Kb4 73.Qd4 Kb5 74.Qc5 Ka4 75.Bd2 Kb3 76.Qc3 Ka2 77.Bc1 Kb1 78.Qb2) 69.g7 Kf3 (69...Kd1 70.g8Q Kc2 71.Qc4 Kb2 72.Bc1 Kb1 73.Qc3 Ka2 74.Qb2) 70.g8N (70.g8Q Ke4 71.Qc4 Ke5 72.Qc6 Kf5 73.f3 Ke5 74.f4 Kf5 75.Qg6) 70...Ke2 71.Bc5 (better 71.f4 Ke3 72.f5 Kd4+–) 71...Kf3 72.Ne7 Kf4 73.Ng6 Kf3 (73...Kf5 74.f4+–) 74.Bd4 (better 74.Kg5!? Ke4+–) 74...Ke4 75.Bb6 Kf5 76.f4 (better 76.Nh4 Ke4+–) 76...Ke4 (76...Kf6+–) 77.Kh6 (better 77.Kg4 Kd5 78.f5 Kd6+–) 77…Kf5 ½–½. aravind555 – mdiyaz, lichess.org, 2018.

3.Bb2 Nf6

4.a3 Nc6 5.d3 (5.Nf3 e5=+) 5...d5 6.Nd2 e5 7.Nb3 Rb5 (7...Ra8 8.Nf3–/+) 8.h3 (better 8.e3 d4 9.Nf3=+) 8...Na5 (better 8...d4!?–/+) 9.Be5+= Nb3 10.cb3 Be6 11.Rc1?? (11.e3 Nd7 12.Bc3 d4 13.Bd4 Bb3+=) 11...c6?? (better 11...Ba3 12.e3 Bc1 13.Qc1 Rb3–+) 12.b4+= Qa8 13.Bf6 gf6 14.Rc3?? (better 14.Qb3 Rb6 15.Qb2=) 14...d4–+ 15.Rc5 (15.Rb3 Bb3 16.Qb3 Rb4 17.ab4 Qa1 18.Kd2 Bh6 19.e3 Qf1 20.Qd1 Qg2 21.Ne2 Qf2 22.Kc2 de3 23.Qf1–+) 15...Qa3 (worse 15...Bc5 16.e3 Qa3 17.bc5 Qc3 18.Ke2 Rb2 19.Kf3–+) 16.Rb5 cb5 17.Nf3 (17.f4 Bb4 18.Kf2–+) 17...Bb4 (17...Qb4?! 18.Nd2–/+) 18.Nd2 0–0 (better 18...Bb3! 19.f3 Bd1–+) 19.g4 (19.e3 Rc8 20.Ke2–+) 19…Rc8 (19...Rc8 20.e4 Bb3 21.Qb3 Qb3–+) 0–1. adabriwala (1615) – Dikko (1915), lichess.org, 2019.

4.Nc3 Nc6 A) 5.Nf3 A1) 5...d5 6.e3 (6.a4 g6 7.e4 d4 8.Nb5 Bg7 9.Nbd4 Nd4 10.Bd4; 6.d4 Bf5 7.e3 e6 8.Bb5 Bd6 9.0–0 0–0 10.Bc6) 6...g6 7.Bb5 Bh6 8.0–0 0–0 9.h3 Be6 10.a4; A2) 5...e5 6.e4 (6.e3 e4 7.Nd4 Nd4 8.ed4 d5 9.Be2 c6 10.0–0) 6...Bc5 7.Bc4 d6 8.0–0 0–0 9.a4 Nd4 10.Nd4; A3) 5...g6 6.Ne4 (6.a4 Bg7 7.e3 d6 8.Bb5 0–0 9.0–0 Nb4 10.Nd4; 6.e3 Bg7 7.a4 0–0 8.Bb5 d6 9.0–0 Bd7 10.Ba3; 6.d4 Bg7 7.e3 0–0 8.Be2 d6 9.0–0 Bf5 10.Qd2; 6.h3 Bg7 7.e3 0–0 8.Bb5 d5 9.0–0 Qd6 10.a4; 6.Rb1 Bg7 7.e4 0–0 8.Bc4 e6 9.0–0 d5 10.ed5) 6...Bg7 7.Nf6 Bf6 8.Bf6 ef6 9.e3 0–0 10.Bd3; B) 5.e4 B1) 5...g6 6.Rb1 (6.Nf3 Bg7 7.Bd3 0–0 8.0–0 d6 9.Rb1 Be6 10.Qe2; 6.Bd3 Bg7 7.Nf3 0–0 8.0–0 d5 9.Nd5 Nd5 10.Bg7) 6...Bg7 7.Nf3 0–0 8.Bc4 e6 9.0–0 d5 10.ed5; B2) 5...d5 6.ed5 Nd5 7.Nf3 Nf4 8.Ne2 Ng6 9.Ng3 Qd5 10.c4; C) 5.e3 C1) 5...e5 6.Nb5 (6.Be2 Be7 7.Nb5 0–0 8.Nf3 d6 9.0–0 Bf5 10.a4; 6.Nf3 e4 7.Nd4 Nd4 8.ed4 d5 9.Be2 c6 10.0–0; 6.Bb5 d5 7.Nf3 Bd6 8.d4 Bg4 9.Bc6 bc6 10.h3) 6...d6 7.Nf3 Be7 8.Be2 0–0 9.0–0 Bf5 10.a4; C2) 5...d5 6.Nf3 (6.Nb5 Ne4 7.Nf3 f6 8.Bd3 e5 9.0–0 Kf7 10.Nh4; 6.Bb5 e5 7.Nf3 Bd6 8.d4 Bg4 9.h3 Bf3 10.Qf3; 6.d4 Qd6 7.a3 Ne4 8.Nge2 e5 9.Ne4 de4 10.Nc3; 6.Be2 g6 7.Nf3 Bg7 8.d4 Bf5 9.0–0 0–0 10.h3; 6.a4 e5 7.Nb5 Bb4 8.Nf3 Qe7 9.Be2 0–0 10.0–0) 6...g6 7.Bb5 Bh6 8.0–0 0–0 9.h3 Bg7 10.a4; C3) 5...g6 6.Bd3 (6.Nf3 Bg7 7.Bd3 0–0 8.0–0 d6 9.a3 e5 10.e4; 6.a4 Bg7 7.Nf3 0–0 8.Bb5 d5 9.0–0 Be6 10.Qe2; 6.Bb5 Bh6 7.Nf3 0–0 8.0–0 d5 9.h3 Qd6 10.a4; 6.f4 Bg7 7.Nf3 0–0 8.Bd3 d6 9.0–0 Bg4 10.h3; 6.Be2 Bg7 7.Nf3 0–0 8.d4 d6 9.Qd2 d5 10.h4; 6.d4 Bg7 7.Nf3 0–0 8.Be2 d6 9.Qd2 d5 10.h4; 6.h3 Bg7 7.Nf3 0–0 8.Bb5 d5 9.0–0 Bf5 10.a4; 6.Ne4 Bg7 7.Nf3 0–0 8.Nf6 Bf6 9.Bf6 ef6 10.Bd3; 6.Rb1 Bg7 7.Nf3 0–0 8.Bb5 d5 9.0–0 Qd6 10.h3) 6...Bg7 7.Nf3 0–0 8.0–0 d5 9.Nb5 Ne4 10.Bg7.

4.Nc3 d5 5.e3 A) 5...Nbd7 6.Nf3 (6.a4 e5 7.Nf3 c6 8.Ne2 Bb4 9.Ne5 Ne4 10.Nf3; 6.a3 e5 7.Nf3 c6 8.Ne2 Bd6 9.Ng3 0–0 10.Be2; 6.Qb1 g6 7.Nf3 Bg7 8.Be2 0–0 9.0–0 Nc5 10.a4; 6.Be2 c6 7.Nh3 e5 8.Ng5 h6 9.Nf3 Bd6 10.0–0; 6.Nh3 c6 7.Bd3 Nc5 8.Ne2 Qc7 9.0–0 Bh3 10.gh3; 6.h3 e5 7.Nf3 c6 8.Be2 Bd6 9.0–0 0–0 10.d4; 6.g3 Ne5 7.Nf3 Nc4 8.Rb1 e5 9.Bc4 dc4 10.Qe2; 6.h4 g6 7.h5 gh5 8.Nf3 Nc5 9.d4 Nce4 10.Ne5; 6.Rb1 g6 7.Nf3 Bg7 8.Be2 0–0 9.0–0 Nc5 10.d4; 6.Bd3 e5 7.Be2 Nc5 8.a4 c6 9.d4 ed4 10.Qd4; 6.Qc1 g6 7.Nf3 Bg7 8.Be2 0–0 9.0–0 Nb6 10.Ne5) 6...e5 7.Be2 (7.a4 c6 8.Qc1 Bd6 9.Be2 0–0 10.0–0) 7...Be7 (7...c6 8.d4 e4 9.Nd2 Bd6 10.Nb3) 8.0–0 0–0 9.d4+= (9.a4 c6 10.h3) 9...e4 10.Nd2; B) 5...Nc6 6.Nb5 (6.Nf3 g6 7.Nb5 Bg7 8.Bc3 Ra8 9.Bd3 0–0 10.0–0) 6...g6 7.Nf3 Bg7 8.Bc3 Ra4 9.Qb1 0–0 10.Qb3; C) 5...g6 6.Bd3 (6.Nf3 Bg7 7.Nb5 Bd7 8.a4 Nc6 9.Bd3 0–0 10.0–0; 6.h3 Nc6 7.Nf3 Bg7 8.Bb5 0–0 9.0–0 Bf5 10.a4; 6.Nb5 Nc6 7.Nf3 Bg7 8.Bc3 Ra6 9.Bd3 0–0 10.0–0; 6.Rb1 Nc6 7.Nf3 Bg7 8.Bb5 0–0 9.0–0 Qd6 10.h3; 6.f4 Nc6 7.Nf3 Bg7 8.Bd3 0–0 9.0–0 Nb4 10.Be2; 6.a4 Nc6 7.Nf3 Bg7 8.Bb5 0–0 9.0–0 Bf5 10.h3; 6.Bb5 Nc6 7.Nf3 Bg7 8.Nd4 Qd6 9.a4 0–0 10.Ba3; 6.a3 Nc6 7.Nf3 Bg7 8.d4 0–0 9.Bd3 e5 10.de5; 6.Be2 Nc6 7.Nf3 Bg7 8.0–0 0–0 9.d4 Bf5 10.Ne5) 6...Bg7 7.f4 d4 8.Nce2 de3 9.de3 Nc6 10.Nf3; D) 5...d4 6.ed4 Qd4 7.Nf3 Qb6 8.Rb1 Nc6 9.Be2 e5 10.0–0; E) 5...e5 6.Nf3 Nbd7 7.Be2 (7.h4 Be7 8.Be2 0–0 9.0–0 e4 10.Nd4) 7...Be7 (7...c6 8.0–0 Bd6 9.a4 0–0 10.Ba3) 8.0–0 0–0 9.Qe1+= (9.a4 c6 10.Qc1) 9...d4 10.Nd1.

4.Nc3 e5 5.e4 (5.Nf3 Nc6 (5...e4 6.Nd4 Nc6 7.Ncb5 Be7 8.e3 0–0 9.Be2 d5 10.0–0) 6.e4 (6.e3 e4 7.Nd4 Nd4 8.ed4 c6 9.Be2 d5 10.0–0) 6...Bc5 7.Bc4 0–0 8.0–0 d6 9.d3 Be6 10.Nd5) 5...Bc5 (5...Nc6 6.Nf3 (6.Bd3 Bc5 7.Nf3 0–0 8.0–0 d6 9.Nd5 Re8 10.c4) 6...Bc5 7.Ne5 (7.Bc4 0–0 8.0–0 d6 9.d3 Be6 10.Nd5) 7...Ne5 8.d4 Bd6 (8...Bb4 9.a3 Bd6 10.de5) 9.de5+= 9...Be5 10.Bd3; 5...c6 6.Bd3 Bc5 7.Qe2 Na6 8.Nf3 d6 9.a3 0–0 10.0–0) 6.h3 (6.Nf3 d6+= (6...Ng4 7.d4 ed4 8.Nd4 Qh4 9.Qd2 Nc6 10.Nd5) 7.Be2 (7.Bc4 0–0 8.0–0 Nc6 9.h3 Be6 10.Bb3) 7...c6 (7...Nc6 8.0–0 0–0 9.h3 Be6 10.a4) 8.0–0 0–0 9.a4+= (9.d3 Nbd7 10.Rb1) 9...Na6 10.Rb1; 6.Bc4 Nc6 7.Nf3 d6 8.0–0 0–0 9.d3 h6 10.h3; 6.Bd3 Nc6 7.Nf3 0–0 8.0–0 d6 9.Nd5 Bd7 10.Qe2; 6.Be2 Nc6 7.Nf3 0–0 8.0–0 d6 9.a4 Be6 10.Ng5) 6...c6–/+ 7.Qf3 (7.Rb1 d5 8.Bd3 d4 9.Nce2 Na6 10.f4) 7...d5 (7...0–0 8.Bc4 b5 (8...Na6 9.Bb3 d5 10.ed5) 9.Bb3–/+ b4 10.Na4) 8.ed5 (8.Bd3 0–0 9.Nge2 Na6 10.ed5) 8...cd5 9.Bb5 (9.Nd1 Nc6–/+ 10.Qb3; 9.Qe2+= Nc6 10.Nf3) 9...Nc6–/+ (9...Kf8 10.a4) 10.a4 (10.Nge2–+) 10...0–0 11.Nge2 e4 12.Qg3 (12.Qf4 Re8–/+) 12...d4 13.Nd1 (13.Na2 d3! 14.Nf4 Bd6–/+) 13...Nh5 (13...Nb4 14.0–0–+) 14.Qh2 (14.Qb3 Be6 15.Bc4 Bc4 16.Qc4 Qd7–/+) 14...Bd6 (14...Nb4 15.Qe5 d3 16.Nec3 dc2 17.Qh5 Rb5 18.ab5 Nd3 19.Kf1–+) 15.g3 Ne5 (better is 15...Bc5–+) 16.Kf1? (better is 16.Nd4 Bc5 17.f4 ef3 18.Qf2–/+) 16...Nf3–+ 17.Qg2 Nd2 18.Kg1 Be5 19.Kh2 (19.c3 Nf3 20.Kf1–+) 19...Nf3 (19...Nf3 20.Qf3 ef3 21.Bd4 Bd4 22.Nd4 Qd4–+; 19...Nf3–+) 0–1. dennism (2100) – pcmvr (2775), net–chess.com, 2008.

4.c4 g6 5.e3 Bg7 6.Nf3 0–0 7.d4 c5 8.Nc3 d5 9.Rb1 cd4 Black gets the initiative 10.Nd4 (10.Qd4 Ne4 11.Ne5 Nc6 12.Nc6 bc6 (12...Bd4 13.Nd8 Nc3 14.Rc1 Na2 15.Bd4 Nc1 16.Bb6 Nd3 17.Ke2–+) 13.Qg7 Kg7 14.Ne4 f6–+) 10...e5 11.Nb3 d4 12.Na5 Qa5 13.Qa4 (worse is 13.ed4 ed4 14.Qd4 Re8 15.Kd1 Bf5–/+) 13...Qa4 14.Na4 Bf5 15.Ra1 de3 16.f3 (worse is 16.Be5 ef2 17.Kd1 Rd8 18.Kc1 Nc6–/+) 16...Nc6 17.Be2 Nd4 18.Bd4 ed4 19.Rd1? (19.g4!? Bc2 20.Nc5+=) 19...Ra8 20.Nb2 Ra2 21.Nd3 Bd3 22.Rd3 Nd7 23.Rd1 Nc5 24.g4 (24.Kf1 d3! 25.Bd3 Nd3 26.Rd3 Ra1 27.Ke2 Rh1 28.Ke3 Rh2–+) 24...Ne6 (better is 24...d3 25.Rd3 Nd3 26.Bd3 Ra1 27.Ke2 Rh1 28.Ke3–+) 25.c5 Nc5 (better is 25...Nf4!? 26.Bc4 Ng2 27.Kf1 Rf2 28.Kg1–+) 26.Bc4 Rc2 27.Bd5 (27.Bd3 Rc3 28.Ke2–+) 27...d3 28.Rb1 (28.0–0 e2 29.Rfe1–+) 28...Bc3 29.Kf1 e2 0–1. Katsaros,Sotirios (2055) – Koukoufikis,Georgios (2140), Iraklio op 6th, 2002.

4.d3 d5 5.Nd2 Nc6 6.Ngf3 e6 7.g3 Be7 8.Bg2 0–0 9.0–0 Ng4 10.c4 Bf6 11.Qc2 Nb4 12.Qb1 Nc6 13.Qc2 dc4 14.dc4 Qe7 15.a3 (15.Nb3 Ra7=) 15...Bd7 (15...Bb2 16.Qb2 Rd8 17.Nb3+=) 16.h3= Nge5 17.Rfe1 (17.Ne5!? Ne5 18.Ne4+=) 17...Nf3+= 18.Nf3 e5 19.Nd2 Nd4 20.Bd4 ed4 21.h4 1–0. Dejna,Miroslaw – Reza,Wojciech (1810), Ferie z szachami Poland, 2009.

4.d4 d5 5.h3 Rb5 6.Qc1 g6 7.c3 Bg7 8.Nf3 Rb6 9.Nbd2 0–0 10.e3 Bf5 11.Nb3 Ne4 12.Be2 Nd7 13.0–0 Qa8 14.Nfd2 Ndf6 15.Re1 Re8 16.Bf3 Qa7 17.Ne4 Be4 18.Nd2 Bf3 19.Nf3 Qa4 20.Ne5 Ne4 21.Nf3 Ra8 22.Nd2 Nd6 23.f3 Bh6 24.Nb3 Nc4 25.Kf2 Ne3 26.Re3 Re6 (26...Be3?! 27.Qe3 Qc4 28.Qe2= (28.Qe7? Re6 29.Qc5 Re2 30.Kg3 Rb2–+)) 27.Nc5? (27.Re6 Bc1 28.Re2–+) 27...Be3 28.Qe3 (28.Kg3 Qc6 29.Qf1 Qd6 30.f4 Bf4 31.Kf3–+) 28...Qc2 (28...Re3 29.Na4 Re6 30.Nc5+=) 29.Kg3 Re3 (29...Qb2 30.Ne6 Qa1 31.Nc7=) 30.Kf4 Qf2 (better is 30...Qb2 31.Ke3 Qc3 32.Kf4 Qd4 33.Kg3 Qe5 34.f4 Qa1–+) 31.Bc1 e5! 32.de5 (32.de5 Ra4 Mate attack) 32...Ra4! 33.Na4 (33.Na4 Re4 Mate attack) 33...Re4 34.Kg5 Qh4 0–1. grahamtrue (2125) – pierred (2765), net–chess.com, 2011.

4.e3 b6 5.c4 Ne4 (5...Bb7 6.Nf3=) 6.Nf3 f6 (6...e6 7.Be2=) 7.Nc3 (7.d3 Ng5+=) 7...Nd6= 8.Be2 Ba6 9.d3 h5 (9...e5 10.0–0+=) 10.Nd4+– h4 11.Bh5?? (better 11.Ncb5 Bb5 12.Nb5+–) 11...Rah5–+ (11...Rhh5?! 12.Nb3–/+) 12.Qf3 (12.0–0 e5 13.Ndb5 h3–+) 12...Bb7 Black plans h3 13.Ne4 (13.e4–+) 13...f5 (better 13...Ne4 14.de4 Na6–+) 14.Nd6+– cd6 15.Qb7 h3 16.g3 e5 17.Nf3 (17.Nb5!? Nc6+–) 17...Nc6+– 18.0–0 g5 19.a4 (19.Rfb1 g4 20.Nd2 Nb4+–) 19...f4 (19...Na5 20.Qa6+–) 20.ef4 (20.g4!? R5h6 21.e4+–) 20...gf4+– 21.gf4 Rg8 (21...Bh6 22.fe5 de5 23.Kh1+=) 22.Kh1+– ef4 (22...Rg2 23.Bc1+–) 23.Rg1 (23.Rae1!? Be7+–) 23...Rg1+– 24.Rg1 Ne5? (24...Ra5 25.Re1 Kf7 26.Nd4 Nd4 27.Bd4=) 25.Be5 (better 25.Re1!? Qe7 26.Be5 de5 27.Ne5 Re5 28.Qb8 Kf7 29.Re5+–) 25...de5 26.Qe4 (better 26.d4 ed4 27.Qe4 Qe7 28.Qg6 Qf7 29.Qb6+–) 26...d6?? (better 26...Qf6+–) 27.Qg6+– Kd7 28.Qh5 Kc6 (28...Qe7 29.Rg8 Qf6 30.Qh3 Ke7 31.Ng5+–) 29.Qh3 (29.Qh3 Kc7 30.Rg8+–) 1–0. aravind555 – CharlesSickness, lichess.org, 2018.

4.e3 d6 5.Nf3 (5.Bf6 ef6 6.Nf3 d5=) 5...Bg4 (5...e5 6.Bc3 Ra8 7.a4+=) 6.Be2 Nbd7 7.0–0 Qa8 8.a3 Nc5 (8...e5 9.Nc3=) 9.h3 (9.Bf6 ef6 10.d4 Ne4+=) 9...Bd7 (9...Bf3 10.Bf3 (worse is 10.gf3 Na4 11.Bf6 gf6+=) 10...e5 11.Bc3+=) 10.d4 (10.Bf6 ef6 11.d4 Ne4=) 10...Na4 11.Qc1 Nb2 12.Qb2 b6 13.c4 Ne4 (13...e6 14.Nc3=) 14.Nc3 White prepares d5 14...Nc3 15.Qc3 e6 16.Rfc1 (16.Nd2 Be7=) 16...Be7 17.e4 (17.Nd2 Bc6 18.Bf3 0–0=) 17...0–0 (17...Qe4 18.Qd2–/+) 18.d5 (18.Qd3 e5+=) 18...e5 (18...Bf6 19.Nd4–/+) 19.Nd2 (19.Bd3 Qa7+=) 19...f5 20.Bd3 f4 21.f3 (21.Be2 Qe8+=) 21...Bh4 22.Nb3 Ra7 (22...Ra3? 23.Ra3 Qa3 24.Ra1+–) 23.Qb4 Ba4 (23...Ra4 24.Qd2–/+) 24.Nd2 Bd7 25.Bc2 (25.Nb3 Ra4 26.Qd2–/+) 25...Qd8–/+ 26.a4 (better is 26.Rf1!?–/+) 26...Qg5–+ 27.Nf1 Bh3 (27...Bh3 28.Qd2 Rf6–+) 0–1. Fournier,Frederic (1910) – cozol (1905), Active, 2004.

4.e3 e6 5.Nf3 b6 6.Be2 Bb7 7.0–0 d6 8.c4 Be7 9.Nc3 Nbd7 10.Nb5 (10.d4 0–0=) 10...Nc5 (10...0–0 11.d4=) 11.Bc3 Ra8 12.Bb4 (12.Bf6 Bf6 13.d4 Na4=) 12...0–0 13.a3 Bc6 (13...Na6 14.Bc3=+) 14.Nfd4 Bb7 (14...Bd7 15.Bf3 d5 16.d3=+) 15.Bf3 (15.Nf3 c6 16.Bc5 dc5=+) 15...Bf3 (15...d5 16.d3=) 16.Qf3 Nd3 17.Nc6 Qd7 18.e4 (18.Ne7 Qe7 19.e4 Ne5=) 18...Nb4 (better 18...Qc6!? 19.Qd3 Ne4 20.Nc7 Nf2 (worse 20...Qc7 21.Qe4 Bf6 22.Rab1=) 21.Rf2 Qc7–/+) 19.ab4?? (better 19.Ne7 Qe7 20.ab4 Ra1 21.Ra1=) 19…Qc6–+ (19...Qc6 20.d3 Ra1 21.Ra1 d5–+) 0–1. aravind555 (1630) – aldeano2 (1610), lichess.org, 2019.

4.e3 e6 5.Nf3 Nc6 6.Be2 Be7 7.0–0 Rb5?? (better 7...0–0=) 8.Bb5+– 0–0 9.Bc6 bc6 10.Bf6 (10.d3 d6+–) 10...Bf6 11.c3 Bb7 12.d4 c5 13.Qb3 (13.Re1!? cd4 14.ed4 Qa8+–) 13...Bd5 (13...Bf3 14.gf3 cd4 15.cd4+–) 14.c4 (14.Qb5 Bf3 15.gf3 cd4 16.cd4 c6+–) 14...Be4? (14...Bf3 15.gf3 cd4+–) 15.Nbd2 Bf3 16.Nf3 (worse 16.gf3 cd4 17.Rab1 d5+–) 16...cd4 17.ed4 (worse 17.Nd4 c5 18.Nb5 Ba1 19.Ra1 d5+–) 17...c6 18.Rad1 Qc7 19.a4 Rb8 20.Qa3 Qa5 (20...Ra8 21.c5+–) 21.d5! cd5 (21...cd5 22.Qd6 Double attack (22.Qd6 Decoy); 21...ed5 22.Qd6 Double attack (22.Qd6 Decoy)) 22.cd5 h6 (22...ed5 23.Rfe1+–) 23.de6 de6 24.h3 (24.Rd7 Rb4 25.Qc1 Qa8+–) 24...Bb2 (24...Qa7 25.Rfe1+–) 25.Qe7 (25.Qd6 Ra8 26.Rb1 Rd8+–) 25...Rf8 (25...Bf6 26.Qd7+–) 26.Qb7 Bf6 27.Qb5 (27.Qe4 Ra8 28.Rb1 Qd5+–) 27...Qa8 (27...Ra8 28.Rd7 Qa4 29.Qb7+–) 28.a5 (28.Rd6 Rd8 29.Rd8 Qd8+–) 28...Rb8 29.Qa4 Bc3 (29...Qa6 30.Rb1 Ra8 31.Rfc1+–) 30.a6 Rb6 (30...Rc8+–) 31.a7 Bf6 32.Rd7 e5 (32...Rb2 33.Rc1 Kh7 34.Rdc7+–) 33.Rfd1 e4 (33...Kh7 34.Rf7 Re6 35.Rb1+–) 34.Nd4 (better 34.Qa5 Rb8 35.ab8R Qb8 36.Rd8 Qd8 37.Rd8 Bd8 38.Qd8 Kh7+–) 34...e3 35.fe3 Qe8 (35...Bg5 36.Nf3 Rb2+–) 36.a8Q Rb8 37.Qb8! Qb8 (37...Qb8 38.Qb3 Double attack (38.Qb3 Decoy)) 38.Nc6 Qg3 39.Qa8 Kh7 40.Qa7 (40.Qe8 Qg6 41.R1d6 h5 42.Rf7 Qb1 43.Kh2 Qg6 44.Rdf6 Qg3 45.Kh1 Qe1 46.Rf1 Qa5 47.Rf8 g6 48.Qe7 Kh6 49.Rh8) 40...Bh4 41.Rf1 (better 41.Rf7 h5+–) 41...Bg5 42.Rdf7 (better 42.Rf3 Qe1 43.Kh2 Be3 44.Re3 Qa1 45.Qa1 g5 46.Rf7 Kg6 47.Qf6 Kh5 48.g4 Kh4 49.Qh6) 42...Be3 43.Qe3! Qe3 (43...Qe3 44.Kh2 Combination) 44.R7f2 (44.Kh2 Qe6 45.Ne7 Qe5 46.g3 Qe2 47.R1f2 Qc4+–) 44...Qe4 45.Na5 Qb4 46.Rf5 Qd4 47.Kh1 Qe4 48.Nb3 Qc4 49.Nc5 Qd4 50.Ne6 Qd7 (50...Qe4 51.Nf8 Kg8+–) 51.Nf8 Kg8 52.Nd7 Kh7 53.Rf7 (53.Nf8 Kh8 54.Ne6 Kh7 55.Rf7 Kg6 56.Rg7 Kh5 57.Rf5 Kh4 58.Rg4) 53...Kg6 (53...h5 54.Nf8 Kg8 55.Ne6 Kh8 56.Rg7 h4 57.Rf8) 54.Nf8 Kg5 (54...Kh5 55.R1f5 g5 56.g4 Kh4 57.Kg2 h5 58.Ng6) 55.Rg7 Kh5 (55...Kh4 56.Rg4 Kh5 57.Rf5) 56.Nh7 (56.Rf5 Kh4 57.Rg4) 56...Kh4 57.Rg4 Kh5 58.Rf5 (58.Nf6) 1–0. Akrapovik (1615) – vitalik1950, lichess.org, 2020.

4.Nf3 Rb5 5.Qc1 d5 6.e3 e6?? (better is 6...Ra5=) 7.Bb5+– c6 8.Be2 Qa5 9.0–0 Na6 10.d4 Nb4 11.Bc3 Qa4 12.Bb4 Qb4 13.c3 Qa4 14.Bd1 Qb5 15.a4 Qc4 16.Nbd2 Qd3 17.Qc2 Qc2 18.Bc2 Bd6 19.c4 b6 20.cd5 Nd5 21.a5 ba5 22.Ra5 0–0 23.Ra8 Nb4 24.Bb3 Ba6 25.Rf8 Kf8 26.Ra1 Bb5 27.e4 Ke7 28.e5 Bc7 29.Bc4 Nc2 30.Ra7 Kd7 31.Bb5 cb5 32.Nb3 Kc6 33.Ng5 Bb6 34.Ra6 Kb7 35.Rb6 Kb6 36.Nf7 b4 37.Kf1 Kb5 38.Ke2 Kc4 39.Na5 Kd4 40.Nc6 Kd5 41.Nfd8 b3 42.Kd2 Na3 43.Kc3 b2 44.Kb2 Nc4 45.Kc3 Ne5 46.Ne5 Ke5 47.Kd3 Kf5 48.Ke3 e5 49.Nc6 g5 50.f3 h5 51.Ne7 Ke6 52.Nc6 Kd5?? 53.Nb4+– Kc4 54.Nd3 Kd5 55.g3 Ke6 56.h3 Kf5 57.Nc5 g4 58.hg4 hg4 59.f4 ef4 60.gf4 g3 61.Nd3 Kg4 62.Ke2 Kh3 63.Kf1 Kg4 64.Kg2 Kf5 65.Ne1 Kf4= 66.Nf3 Kg4 67.Ng1 Kh4 68.Ne2 Kg4 69.Ng3 ½–½. futsalboy (1685) – goldengab, kurnik, 2011.

4.Nf3 d5 5.Bc3 Ra8 6.e3 =.

4.Nf3 d6 5.e3 Nc6 6.Nc3 (6.Bc3 Rf5=) 6...Bg4 7.Be2 g6 (7...e5!?=+) 8.Ne4= Bg7 9.Nf6 ef6 10.0–0 0–0 11.Qe1 Bf3 (11...Qd7 12.Qb1=) 12.Bf3+= (worse 12.gf3 f5 13.Qc1 f4=+) 12...Ne5 (12...d5 13.d4 Qd6 14.Qc3+=) 13.Be2 Qa8 14.a3 (14.Qb1 Ra4+=) 14...f5 (14...Ra4 15.Qd1+=) 15.d4 Nc6 16.Bf3 Rb5 (16...f4 17.Qc3+=) 17.Rb1+– Na5 (17...Re8 18.c4 Rb2 19.Rb2 Nd4 20.Bb7 Qa3 21.Rb1+=) 18.Be2 (18.Qe2 c6+–) 18...Rb6 19.c4 (19.Qd2 Re8+–) 19...Nc6 (better 19...f4+=) 20.c5?? (20.Qd2 Re8+–) 20...Rb2?? (better 20...dc5 21.Bf3 Rd8–/+) 21.Rb2+= Qa3? (better 21...dc5 22.Qb1 Nd8+=) 22.Rb7+– dc5 (22...Nd8 23.Rb5+–) 23.Rc7 Nb4 24.Rc5 Nd3 (24...f4 25.Rb5 Nc6 26.Qc1+–) 25.Bd3 (better 25.Qa5!? Qa5 26.Ra5 Nb4+–) 25...Qd3 26.Qa5 (26.Qb1 Qa6+–) 26...f4 27.ef4 (27.Qc3 Qe4+–) 27...Bd4 28.Rd5 Re8 29.Qb5 (29.f5 gf5 30.Rf5 Bc3+–) 29...Qb5 (29...Bf2 30.Kh1 Qb5 31.Rb5+–) 30.Rb5 Re2 31.g3 Kg7 32.Rbb1 h5 33.Rbe1?? (33.Kg2 Ra2+–) 33...Ra2?? (better 33...Bf2 34.Rf2 Re1 35.Kg2 Kf6=) 34.Rd1+– Bc5 35.Rd5 Rc2 36.f5 (36.Kg2 Kf6+–) 36...g5 37.h3 Kf6 38.g4 hg4 39.hg4 Rc4 40.Kh2 Bd4 41.f3 Be5 42.Kg2 Rc2 43.Rf2 Rc1 44.Re5 Ke5 45.Kg3 Rg1 46.Kh2 Re1 47.Kg2 Kf4 (better 47...Rc1!?=) 48.Ra2 Rb1 49.Ra4 (49.Ra4 Ke5 50.Ra5 Kf6 51.Kf2+–) 1–0. Kabatana_Michael (1815) – brausefrosch (1830), lichess.org, 2018.

4.g3 Rb5 5.Bf6 (5.Bc3 Nc6=) 5...ef6 6.Bg2 h5 (6...d5 7.Nf3=) 7.Nf3 Nc6 8.c3 Ne5 9.Qa4 (9.d4 Nf3 10.Bf3 Ra5=) 9...Rb6 (9...c6 10.Nd4 Rb2 11.f4=) 10.Qe4 (10.d4 Nf3 11.Bf3 h4=) 10...Re6 11.Qd4? (11.Nd4 Re7=) 11...Nf3 (better 11...Bc5! 12.Qd5 c6–/+) 12.Bf3= Qe7 13.0–0 g5 Black plans h4 14.Bd5 (14.e3 c6=) 14...Rd6 (14...Re2 15.Qa7 c6 16.Bc4=+) 15.Qc4 (better 15.Qc5 c6 16.Bc4=+) 15...h4?? (better 15...c6 16.Bg2 b5=+) 16.Qc7+– Rd5 17.Qc8 Qd8 18.Qb7 Re5 19.Qf3 hg3 (19...f5 20.d4 g4 21.Qd3+–) 20.fg3 Bc5 (20...Re6 21.e3+–) 21.e3 (better 21.d4 Ba7 22.Nd2+–) 21...f5?? (21...Be7+–) 22.d4 g4 23.Qf4 Re4 (23...Rd5 24.dc5 Qa5 25.Na3+–) 24.Qf5 (24.dc5 Rf4 25.Rf4 Qe7–+) 24...Re3 (24...Qe7 25.dc5 Re3+–) 25.Qf7 1–0. JUANKARODA (1830) – SoliddSnakee (1840), lichess.org, 2020.

4.g3 c6 5.Bg2 d5 6.d3 Bg4 7.Nd2 Bh5 8.Ngf3 e6 9.c4 Be7 10.0–0 0–0 11.Qb3 b5 12.cd5 ed5 13.Qc2 (13.a4 Re8=) 13...Bg6 (13...Re8 14.e3=) 14.Nb3 Ra7 (14...Ra6 15.Rfc1=) 15.Ne5 Attacking the backward pawn on c6 15...Rc7 (15...Qe8 16.e4=) 16.Ng6 (16.Nd4 Qd6 17.Ng6 fg6+–) 16...fg6 17.Rac1 (17.a4+=) 17...Qc8 (17...c5!?=) 18.Nd4 (18.Be5 Ra7 19.Bf6 Rf6 20.Bd5 Kh8+–) 18...Bd6 19.Nb5?? (19.e4 de4 20.Qb3 Kh8 21.Ne6+– (21.Be4?! Ne4 22.de4 Re8=)) 19...cb5–/+ 20.Qb3 Qd7 (20...Rc1 21.Bd5 Nd5 22.Qd5 Rf7 23.Rc1=+) 21.Bd5 (21.Rc7 Bc7 22.Bf6 Rf6=+) 21...Nd5–/+ 22.Qd5 Kh8 23.Rc7 Qc7 24.Rc1 Qe7 25.Qb5 (better 25.e4!?=+) 25...Qe2–/+ 26.Qd5?? (better 26.f4–/+) 26...Qf2–+ 27.Kh1 Qb2 (27...Qb2 28.Re1 Qd2–+) 0–1. JUANKARODA (1810) – SrishKar (1815), lichess.org, 2020.

4.Nc3 e6

5.e3 A) 5...d5 6.Nf3 (6.Bd3 Nc6 7.Nf3 e5 8.e4 d4 9.Nb5 Nb4 10.Bc4; 6.h3 Nc6 7.Nf3 Bd7 8.Be2 Bb4 9.0–0 0–0 10.a3; 6.Be2 Nc6 7.Nf3 Be7 8.0–0 0–0 9.Nb5 Ne4 10.a4; 6.a4 Nc6 7.Nf3 Bd7 8.Nb5 Bc5 9.Bc3 Ra8 10.Bf6; 6.g3 Nc6 7.Nf3 Bd7 8.Be2 Be7 9.0–0 0–0 10.a4) 6...Bd7 7.Bd3 Nc6 8.0–0 Be7 9.Qe2 0–0 10.a4; B) 5...Be7 6.h3 (6.Nf3 0–0 7.Bd3 Nc6 8.0–0 d5 9.Ne2 Bd7 10.Bc3; 6.Bd3 0–0 7.Nf3 Nc6 8.0–0 d5 9.Nb5 Nb4 10.a4; 6.d4 Nc6 7.Nf3 b6 8.Bd3 Bb7 9.a3 0–0 10.0–0; 6.a4 0–0 7.Nf3 Nc6 8.Bb5 h6 9.0–0 Nb4 10.Qb1; 6.g3 Nc6 7.Nf3 0–0 8.Bb5 e5 9.d4 e4 10.Ne5; 6.Be2 Nc6 7.Nf3 0–0 8.0–0 d5 9.a4 Bd7 10.h3; 6.Bb5 Nc6 7.Nf3 0–0 8.0–0 b6 9.d4 Bb7 10.Qe2; 6.a3 Nc6 7.Nf3 0–0 8.Bb5 d5 9.0–0 Bd6 10.d4; 6.h4 0–0 7.Nf3 Nc6 8.Be2 b6 9.0–0 Bb7 10.a4; 6.Rc1 0–0 7.Bd3 Nc6 8.Nf3 d5 9.0–0 e5 10.Be2; 6.Rb1 0–0 7.Nf3 Nc6 8.Bb5 Nb4 9.a3 Nbd5 10.Nd5) 6...Nc6 7.Nf3 0–0 8.Bb5 b6 9.0–0 Bb7 10.Re1; C) 5...b6 6.Bd3 (6.Nf3 Nc6 7.Bd3 Nb4 8.Bc4 Be7 9.a3 Nc6 10.0–0; 6.f4 Nc6 7.Nf3 Bb7 8.a3 e5 9.Nb5 ef4 10.ef4; 6.Bc4 Nc6 7.Nf3 Be7 8.0–0 0–0 9.Qe2 Bb7 10.Nb5; 6.a3 Be7 7.Nf3 0–0 8.Bb5 Nc6 9.0–0 Bb7 10.Qe2; 6.h3 Nc6 7.Nf3 Bb7 8.Bb5 Bd6 9.0–0 0–0 10.d4; 6.a4 Nc6 7.Nf3 Bb7 8.Nb5 Be7 9.Be2 0–0 10.0–0; 6.Be2 Nc6 7.Nf3 Bb4 8.a3 Be7 9.0–0 0–0 10.Bd3; 6.Nb5 Nc6 7.Nf3 Bb7 8.Bc4 Be7 9.0–0 0–0 10.Qe2; 6.Nh3 Bb7 7.Nf4 Nc6 8.Bb5 Na7 9.Be2 e5 10.Nd3; 6.Bb5 Nc6 7.Nf3 Bd6 8.Bc4 0–0 9.0–0 Be7 10.Qe2) 6...Nc6 7.Nf3 Nb4 8.Bc4 d5 9.Bb5 Bd7 10.Bd7; D) 5...Bc5 6.d4 (6.Nf3 Nc6 7.d4 Be7 8.Bd3 0–0 9.0–0 b6 10.e4) 6...Bb4 7.a3 Be7 8.Nf3 Nc6 9.Bd3 0–0 10.0–0; E) 5...Na6 6.Be2 (6.Nf3 Be7 7.Be2 0–0 8.0–0 b6 9.a3 Bb7 10.d4; 6.f4 Be7 7.Nf3 0–0 8.Be2 Nc5 9.0–0 b6 10.Ne5; 6.Nge2 Be7 7.Nd4 0–0 8.Be2 Nc5 9.0–0 d5 10.Nb3; 6.d4 d5 7.Nf3 Bd6 8.Be2 0–0 9.0–0 Bd7 10.a3; 6.Nh3 Nc5 7.Be2 Be7 8.0–0 0–0 9.d4 Na4 10.Na4) 6...Be7 7.Nf3 0–0 8.0–0 b6 9.Nd4 Bb7 10.Bf3; F) 5...h5 6.Bd3 (6.Be2 Nc6 7.Nh3 Bb4 8.a3 Be7 9.0–0 0–0 10.Nb5; 6.Nh3 Nc6 7.Be2 Be7 8.0–0 0–0 9.f4 d5 10.Nb5; 6.Nf3 Nc6 7.Bd3 Nb4 8.Be2 Be7 9.h4 b6 10.a3; 6.Bb5 Nc6 7.Nf3 b6 8.0–0 Bb7 9.Qe2 Bd6 10.Bc4; 6.a3 Be7 7.Nf3 Nc6 8.Bb5 0–0 9.0–0 d5 10.d4; 6.h3 Nc6 7.Nf3 b6 8.Bc4 Be7 9.0–0 0–0 10.Nb5; 6.Nb5 Nc6 7.Nf3 Be7 8.Ne5 0–0 9.Bc3 Ra6 10.Bd3; 6.a4 Nc6 7.Nf3 Bc5 8.Bd3 0–0 9.0–0 d5 10.Nb5; 6.h4 Nc6 7.Nf3 b6 8.Be2 Bb7 9.a4 Nb4 10.0–0) 6...Na6 7.Be2 Nb4 8.Nf3 Be7 9.a3 Nc6 10.h4; G) 5...Nc6 6.Nf3 (6.Bd3 Bc5 7.Nf3 0–0 8.0–0 d5 9.Nb5 Nb4 10.Nbd4; 6.Bb5 d5 7.Nf3 Bd6 8.0–0 0–0 9.d4 Bd7 10.Qe2; 6.a4 Bc5 7.Nf3 0–0 8.Bb5 d5 9.0–0 Bd7 10.d4; 6.h3 e5 7.Nf3 e4 8.Nd4 Nd4 9.ed4 c6 10.Qe2; 6.a3 d5 7.Nf3 Bd6 8.Nb5 0–0 9.Bc3 Ra4 10.Nd6; 6.Be2 Bc5 7.Nf3 d5 8.d4 Bd6 9.0–0 0–0 10.Nb5; 6.g3 b6 7.Nf3 Bb7 8.Be2 Be7 9.0–0 0–0 10.a4) 6...Be7 7.Bb5 0–0 8.0–0 b6 9.Qe2 Bb7 10.d4.

5.e4 A) 5...b6 6.Nf3 (6.Bd3 Na6 7.Nf3 Nc5 8.0–0 Bb7 9.e5 Nd3 10.cd3; 6.Bc4 Bb7 7.Qe2 Nc6 8.Nf3 Be7 9.0–0 0–0 10.e5) 6...Bb7 7.Bd3 Nc6 8.0–0 Nb4 9.Re1 Nd3 10.cd3; B) 5...Be7 6.Nf3 (6.Bd3 0–0 7.Nf3 Na6 8.e5 Nh5 9.Bb5 c6 10.Ba6) 6...Nc6 7.Bd3 0–0 8.0–0 Nb4 9.Be2 b6 10.e5; C) 5...Bd6 6.Nf3 (6.Bc4 0–0 7.Nf3 Nc6 8.0–0 Be7 9.Qe2 d5 10.Bd3; 6.d4 Bb4 7.a3 Be7 8.Nf3 0–0 9.Bd3 d6 10.0–0; 6.Bd3 Na6 7.Nf3 Nc5 8.Qe2 Nd3 9.cd3 Be7 10.e5; 6.Be2 b6 7.Nf3 Bb7 8.Nb5 Ne4 9.Nd6 cd6 10.d3) 6...Nc6 7.Bc4 0–0 8.0–0 Be7 9.Bd3 d5 10.Qe2; D) 5...Bb4 6.Bd3 (6.Nf3 0–0 7.a3 Be7 8.e5 Nd5 9.Nd5 ed5 10.d4; 6.a3 Be7 7.Nf3 0–0 8.e5 Nh5 9.Bb5 Nc6 10.0–0; 6.Be2 Nc6 7.Nf3 d5 8.e5 Ne4 9.0–0 0–0 10.Bd3) 6...Nc6 7.Nf3 0–0 8.0–0 d6 9.Qe2 Bd7 10.a4; E) 5...h6 6.Nf3 (6.h3 Nc6 7.Nf3 Bc5 8.e5 Nd5 9.Nd5 ed5 10.d4; 6.a4 Bb4 7.Nf3 Nc6 8.Bd3 0–0 9.0–0 d6 10.Qe2; 6.Bc4 d5 7.Bd3 Nc6 8.Nf3 Bc5 9.0–0 0–0 10.a3; 6.Be2 Nc6 7.Nf3 Bb4 8.a3 Be7 9.0–0 0–0 10.d4; 6.Bd3 Nc6 7.Nf3 Bc5 8.0–0 0–0 9.h3 d5 10.ed5) 6...Nc6 7.Bb5 Bc5 8.0–0 0–0 9.e5 Nd5 10.a4; F) 5...g6 6.Nf3 (6.Bd3 Nc6 7.Nf3 Bg7 8.Qe2 0–0 9.0–0 Ng4 10.Rfb1; 6.Be2 Bg7 7.d4 Nc6 8.Nf3 d6 9.0–0 0–0 10.Qd2) 6...Nc6 7.Bd3 Bg7 8.0–0 0–0 9.Qe2 Ng4 10.Rfb1; G) 5...h5 6.Nf3 (6.h3 Nc6 7.Nf3 Bc5 8.e5 Nd5 9.Nd5 ed5 10.d4; 6.Bd3 Nc6 7.Nf3 Bc5 8.0–0 0–0 9.h3 d6 10.a4; 6.Be2 Nc6 7.Nf3 Bb4 8.0–0 0–0 9.a3 Be7 10.d4; 6.Bc4 d5 7.ed5 ed5 8.Bd3 c5 9.Nf3 c4 10.Be2; 6.a4 Nc6 7.Nf3 Bc5 8.d4 Bb4 9.Bd3 g5 10.d5) 6...Nc6 7.Bb5 Bc5 8.a4 e5 9.0–0 0–0 10.h3; H) 5...Nc6 6.Nf3 (6.Bd3 Bc5 7.Nf3 0–0 8.0–0 d6 9.h3 Bd7 10.Re1) 6...d5 7.e5 Ne4 8.Bd3 Nc5 9.0–0 Nd3 10.cd3.

5.Nf3 A) 5...Nc6 6.e4 (6.e3 b6 7.Bd3 Bb7 8.0–0 Be7 9.a3 0–0 10.Qe2; 6.h3 d5 7.e3 Bd7 8.Be2 Be7 9.0–0 0–0 10.a4; 6.h4 Be7 7.e3 0–0 8.Be2 b6 9.0–0 Bb7 10.a4) 6...Bc5 7.e5 Nd5 8.Ne4 Ba3 9.Ba3 Ra3 10.Bb5; B) 5...b6 6.e3 (6.e4 Bb7 7.Bd3 Nc6 8.0–0 Nb4 9.Re1 Nd3 10.cd3; 6.g3 Nc6 7.e4 Bb7 8.Bc4 Ne4 9.Ne4 d5 10.Qe2; 6.h3 Nc6 7.e3 Bb7 8.Bb5 Bd6 9.0–0 0–0 10.d4) 6...Nc6 7.Bd3 Bb7 8.0–0 Be7 9.a3 0–0 10.Qe2; C) 5...Be7 6.e3 (6.e4 0–0 7.e5 Ng4 8.d4 Nc6 9.h3 Nh6 10.Bd3; 6.h3 Nc6 7.e3 0–0 8.Bb5 b6 9.0–0 h6 10.Re1; 6.a4 Nc6 7.g3 0–0 8.Bg2 h6 9.0–0 d5 10.Nb5; 6.d4 Nc6 7.e3 b6 8.Bd3 Bb7 9.0–0 0–0 10.a3; 6.g3 Nc6 7.Bg2 e5 8.d4 e4 9.Ne5 Ne5 10.de5) 6...0–0 7.Bb5 b6 8.Nd4 Bb7 9.0–0 Nc6 10.Qe2; D) 5...h5 6.e3 (6.e4 Nc6 7.Bb5 Bc5 8.0–0 Nd4 9.a4 c6 10.Bd3; 6.h3 d5 7.e3 Nc6 8.Be2 Be7 9.0–0 0–0 10.d4; 6.a4 Nc6 7.e3 Bc5 8.Bb5 d5 9.Ba3 Ba3 10.Bc6; 6.h4 Nc6 7.e3 Be7 8.Nb5 0–0 9.Ng5 Ng4 10.Bc3; 6.a3 Nc6 7.e3 Be7 8.h4 0–0 9.Bd3 e5 10.Ng5) 6...Nc6 7.h3 d5 8.Bd3 e5 9.Ng5 Nb4 10.0–0; E) 5...Bc5 6.d4 (6.e4 Nc6 7.e5 Nh5 8.d4 Bb6 9.g4 Nf4 10.Qd2; 6.e3 Nc6 7.d4 Be7 8.Bd3 0–0 9.0–0 b6 10.e4; 6.h3 Nc6 7.e3 0–0 8.d4 Bb6 9.Be2 d6 10.0–0) 6...Bb4 7.a3 Be7 8.e4 0–0 9.Bd3 d6 10.0–0; F) 5...h6 6.e4 (6.e3 Nc6 7.Bd3 Nb4 8.0–0 Be7 9.Bb5 0–0 10.Nd4; 6.h3 Nc6 7.e3 Be7 8.Bd3 Nb4 9.0–0 0–0 10.Bb5; 6.a4 Nc6 7.e4 Be7 8.Bd3 0–0 9.0–0 Nb4 10.Qe2; 6.a3 Nc6 7.e3 Bc5 8.d4 Be7 9.Bd3 0–0 10.0–0; 6.h4 Nc6 7.e3 Be7 8.Bd3 0–0 9.a4 e5 10.0–0; 6.g3 Nc6 7.Bg2 d5 8.a4 Bb4 9.0–0 Bd7 10.Nb5) 6...Nc6 7.Bb5 Bc5 8.0–0 0–0 9.e5 Nd5 10.Qe2; G) 5...d5 6.e3 (6.a4 Nc6 7.g3 Bc5 8.Bg2 e5 9.Nb5 d4 10.0–0) 6...Bd7 7.Bd3 Nc6 8.0–0 Be7 9.a4 e5 10.e4.

5.g3 A) 5...b6 6.Bg2 (6.Nf3 Nc6 7.a4 Rh5 8.Nb5 Bb7 9.Bg2 Be7 10.0–0; 6.a4 Nc6 7.Nf3 Rh5 8.Nb5 Bc5 9.e3 0–0 10.Bg2; 6.e3 Nc6 7.Nf3 Bb7 8.Be2 Be7 9.0–0 0–0 10.a4; 6.d4 Bb7 7.Nf3 Bd6 8.Bg2 0–0 9.0–0 Qe7 10.a4) 6...Nc6 7.Nh3 Bd6 8.0–0 0–0 9.Nf4 Bf4 10.gf4; B) 5...e5 6.Nf3 (6.e4 Bc5 7.Nf3 Nc6 8.Bg2 0–0 9.0–0 d6 10.a4; 6.e3 Nc6 7.Nb5 Be7 8.Nf3 d6 9.a4 0–0 10.d3; 6.a4 Nc6 7.Bg2 Bc5 8.Nf3 e4 9.Nh4 d5 10.d3; 6.f4 ef4 7.gf4 d5 8.e3 Nc6 9.Nf3 Be7 10.Rg1) 6...Nc6 7.e4 Bc5 8.Bb5 0–0 9.0–0 Nd4 10.Bd3; C) 5...Bb4 6.Nf3 (6.e3 Nc6 7.Nf3 d5 8.a3 Bd6 9.Nb5 0–0 10.Nd6; 6.a3 Be7 7.Nf3 Nc6 8.d4 0–0 9.Bg2 h6 10.0–0; 6.Bg2 d5 7.a4 Nc6 8.Nf3 0–0 9.0–0 e5 10.Nb5; 6.a4 0–0 7.Bg2 Nc6 8.Nf3 Rh5 9.0–0 d5 10.Nb5; 6.Nh3 Nc6 7.Nf4 d5 8.Bg2 e5 9.Nd3 Be7 10.0–0) 6...Nc6 7.e3 0–0 8.a3 Be7 9.Bb5 d5 10.0–0; D) 5...Bd6 6.Nf3 (6.a4 0–0 7.Nf3 c6 8.Bg2 Qb6 9.Rb1 Na6 10.0–0; 6.Bg2 Nc6 7.a4 Rf5 8.Nf3 0–0 9.0–0 Be7 10.Nb5; 6.e3 Nc6 7.Nf3 0–0 8.a4 Bb4 9.Bb5 d6 10.Na2; 6.e4 Nc6 7.Nf3 0–0 8.Bd3 b6 9.Qe2 Ne5 10.a4) 6...Nc6 7.a4 0–0 8.Nb5 Bb4 9.Bg2 d5 10.0–0; E) 5...d5 6.e3 Bd7 7.Nf3 Nc6 8.Be2 Bb4 9.a3 Be7 10.a4; F) 5...Be7 6.e3 (6.Nf3 Nc6 7.a4 0–0 8.Bg2 Rh5 9.0–0 d5 10.h3; 6.a4 0–0 7.Nf3 Na6 8.d4 Nb4 9.Bg2 d6 10.0–0) 6...0–0 7.Nf3 Nc6 8.Be2 e5 9.Nb5 d6 10.0–0; G) 5...h6 6.e3 (6.Nf3 Be7 7.Bg2 0–0 8.0–0 d5 9.a4 Bd7 10.d3; 6.e4 Be7 7.Nf3 Nc6 8.Bb5 0–0 9.0–0 d5 10.e5; 6.Bg2 Nc6 7.Nf3 d5 8.a4 Bb4 9.0–0 0–0 10.Nb5; 6.d4 Nc6 7.Nf3 d5 8.Bg2 Be7 9.0–0 0–0 10.Ne5) 6...Nc6 7.Nf3 Be7 8.Bb5 0–0 9.0–0 b6 10.d4; H) 5...h5 6.Nf3 (6.d4 Nc6 7.Nf3 d5 8.Bg2 Be7 9.0–0 0–0 10.Qd3; 6.a4 h4 7.gh4 Rh4 8.Nf3 Rg4 9.Bh3 Rg6 10.Rg1) 6...Nc6 7.Bg2 d5 8.a4 Bb4 9.0–0 0–0 10.Nb5; I) 5...Nc6 6.Nf3 (6.a4 b6 7.Nf3 Bb4 8.Nb5 0–0 9.Bg2 Bb7 10.0–0; 6.e3 b6 7.Nf3 Bb7 8.Be2 Be7 9.0–0 0–0 10.a4; 6.Bg2 d5 7.d4 Bd7 8.Nf3 Be7 9.0–0 0–0 10.Ne5) 6...b6 7.e4 Bb7 8.Bc4 Ne4 9.Ne4 d5 10.Qe2.

5.Nh3 A) 5...b6 6.e3 (6.Nf4 e5 7.Nd3 Bb7 8.e3 Nc6 9.a4 Be7 10.Nb5; 6.a4 Nc6 7.e3 Bb7 8.Nf4 Bd6 9.Nb5 Be5 10.Be5; 6.a3 Nc6 7.e3 Be7 8.Bb5 0–0 9.0–0 Bb7 10.d4; 6.e4 Nc6 7.Bd3 Bb7 8.0–0 Bd6 9.Rb1 Ne5 10.Nb5) 6...Bb7 7.Nf4 Bd6 8.Bb5 Bf4 9.ef4 Bg2 10.Rg1; B) 5...d5 6.e3 Nc6 7.Nb5 Bd7 8.Be2 Be7 9.0–0 0–0 10.a4; C) 5...Nc6 6.e3 d5 7.Nb5 Bd7 8.Be2 Bc5 9.d4 Bb4 10.c3; D) 5...Be7 6.e4 (6.g3 Nc6 7.Bg2 e5 8.0–0 d5 9.a4 0–0 10.Nb5; 6.e3 Nc6 7.Bb5 0–0 8.0–0 d5 9.d4 Bd7 10.Nf4; 6.a4 Nc6 7.g3 0–0 8.Bg2 Ne5 9.Nb5 Nc4 10.Bc3; 6.d4 Nc6 7.e3 0–0 8.Be2 d6 9.0–0 e5 10.d5; 6.f3 Nc6 7.e3 d5 8.Bd3 Bd7 9.0–0 0–0 10.Qe2) 6...Nc6 7.Bd3 0–0 8.0–0 e5 9.Ng5 h6 10.Nf3; E) 5...Bc5 6.e3 (6.d4 Be7 7.e3 Nc6 8.Be2 0–0 9.0–0 b6 10.Nf4; 6.Nf4 Nc6 7.e3 0–0 8.Be2 Bb6 9.0–0 e5 10.Nd3; 6.g3 e5 7.Bg2 Nc6 8.0–0 d5 9.a4 0–0 10.Nb5; 6.e4 Bd4 7.Bd3 Nc6 8.0–0 0–0 9.Nf4 Ne5 10.Nfe2) 6...Nc6 7.d4 Be7 8.Be2 0–0 9.0–0 b6 10.Nf4; F) 5...Bb4 6.a3 (6.e3 Nc6 7.Bd3 Ne5 8.0–0 0–0 9.Be2 d5 10.f4; 6.Nf4 Nc6 7.e4 0–0 8.Bd3 b6 9.0–0 Bb7 10.Nb5; 6.g3 Nc6 7.Nf4 d5 8.Bg2 e5 9.Nd3 Bf5 10.0–0) 6...Bc5 7.e3 Nc6 8.d4 Bb6 9.Nb5 Qe7 10.Bd3.

4.Nf3 Nc6

5.Na3 A) 5...d5 6.e3 g6 7.Nb5 Bg7 8.Bc3 Ra4 9.Bd3 0–0 10.0–0; B) 5...d6 6.e3 e5 7.Nc4 Rd5 8.Be2 Be7 9.d3 h6 10.0–0; C) 5...Rh5 6.e3 (6.h3 e6 7.e3 Bb4 8.Bd3 0–0 9.Rb1 e5 10.Nc4) 6...e5 7.Be2 Bc5 8.0–0 0–0 9.Nc4 d6 10.d4; D) 5...g6 6.Nc4 (6.e3 d5 7.Nb5 Bg7 8.Bc3 Ra4 9.Bd3 0–0 10.0–0; 6.e4 Bg7 7.Nc4 Ra4 8.e5 Nd5 9.Bd3 Nf4 10.0–0; 6.g4 Rg8 7.Nc4 Ra4 8.g5 Rc4 9.gf6 ef6 10.e3) 6...Ra4 7.e3 Bg7 8.Bd3 d5 9.Nce5 0–0 10.0–0; E) 5...e6 6.Nc4 Rd5 7.e3 b5 8.Nce5 Bb7 9.Nc6 Bc6 10.Nd4.

5.a4 g6 (5...e5 6.Na3 e4 7.Nd4 Nd4 8.Bd4 Bc5 9.Bc5 Rc5 10.g3) 6.Nc3 (6.e3 Bg7 7.Bb5 0–0 8.0–0 d5 9.Nc3 Ne4 10.d4; 6.Bc3 Ra8 7.Na3 Bg7 8.e3 0–0 9.Nb5 Re8 10.Be2; 6.h3 Bh6 7.Nc3 0–0 8.e3 d5 9.Bb5 Bf5 10.0–0; 6.Na3 d5 7.e3 Bg7 8.Bd3 0–0 9.Nb5 Ne4 10.Bg7; 6.g3 Bh6 7.Nc3 0–0 8.Bg2 d6 9.0–0 Rh5 10.Nb5) 6...Bg7 7.e3 0–0 8.Bb5 d5 9.0–0 Ne4 10.d4.

5.Bc3 Rf5 =.

5.Nc3 A) 5...e5 6.e4 (6.e3 e4 7.Nd4 Nd4 8.ed4 c6 9.Be2 d5 10.0–0) 6...Bc5 7.Bc4 0–0 8.0–0 d6 9.h3 Be6 10.Bb3; B) 5...d5 6.e3 (6.a4 g6 7.e4 d4 8.Nb5 Bg7 9.Nbd4 Nd4 10.Bd4) 6...g6 7.Nb5 Bg7 8.Bc3 Ra6 9.Bd3 0–0 10.0–0; C) 5...g6 6.e3 (6.h3 Bg7 7.e3 0–0 8.Bb5 d5 9.0–0 Bf5 10.a4; 6.Ne4 Bg7 7.Nf6 Bf6 8.Bf6 ef6 9.e3 0–0 10.d4; 6.a4 Bg7 7.e3 0–0 8.Bb5 d5 9.0–0 Ne4 10.d4; 6.a3 Bg7 7.e3 0–0 8.Bb5 d5 9.0–0 Bf5 10.h3; 6.Rb1 Bg7 7.e4 0–0 8.Bc4 e6 9.0–0 d5 10.ed5) 6...Bg7 7.Bd3 0–0 8.0–0 d6 9.h3 Nb4 10.Bc4.

5.e3 A) 5...g6 6.Bc3 (6.a4 Bg7 7.Nc3 0–0 8.Bb5 d5 9.0–0 Ne4 10.d4; 6.Bd3 Bg7 7.Na3 0–0 8.0–0 d5 9.Nb5 Ne4 10.Bg7; 6.Nc3 Bg7 7.Bb5 0–0 8.0–0 d5 9.a4 Ne4 10.d4; 6.Na3 d5 7.Nb5 Bg7 8.Bc3 Ra6 9.Nbd4 Nd4 10.Bd4; 6.h3 Bg7 7.Nc3 0–0 8.Bb5 Ne4 9.a4 d5 10.0–0) 6...Ra8 7.Bf6 ef6 8.Nc3 d5 9.Bb5 Bc5 10.Nd4; B) 5...d5 6.Nc3 (6.Na3 g6 7.Nb5 Bg7 8.Bc3 Ra6 9.Nbd4 Nd4 10.Bd4; 6.Bc3 Ra8 7.Bb5 Bd7 8.Bf6 gf6 9.Nc3 Rg8 10.g3; 6.a4 g6 7.Nc3 Bg7 8.Bb5 0–0 9.0–0 Ne4 10.Qb1; 6.Bd3 g6 7.Nc3 Bg7 8.Nb5 0–0 9.Bc3 Ra6 10.0–0; 6.Ne5 Qd6 7.Nc6 bc6 8.Bd3 g6 9.Nc3 Bg7 10.0–0) 6...g6 7.Nb5 Bg7 8.Bc3 Ra6 9.Nbd4 Nd4 10.Bd4; C) 5...e5 6.Be2 (6.Bc3 Rc5 7.Be2 e4 8.Nd4 Be7 9.0–0 0–0 10.Bb2; 6.Nc3 e4 7.Nd4 Nd4 8.ed4 d5 9.Be2 c6 10.0–0; 6.a4 Bb4 7.Na3 e4 8.Nd4 0–0 9.Nab5 Nd4 10.Nd4) 6...Be7 7.Nc3 0–0 8.Nb5 d6 9.0–0 Bf5 10.a4.

5.g3 e5+= 6.d3 (6.Bg2 d6+=) 6...d5 (6...Bb4 7.Nbd2+=) 7.Bg2 (7.Ne5 Ne5 8.Be5 d4+=) 7...Bb4 (7...Bd6 8.0–0–/+) 8.c3 (8.Nbd2 d4+=) 8...Be7 (8...Bd6 9.0–0+=) 9.0–0+= 0–0 10.e3 (10.Nbd2 Re8+=) 10...Bf5–/+ 11.d4 (11.Nh4 Bg4 12.Qc2 Qd7–/+) 11...e4 12.Nfd2 Qd7 (12...Qa8 13.c4 dc4 14.Nc3+=) 13.Re1 (13.c4 Nb4–/+) 13...Bh3 (13...Rfa8 14.Qb3–+) 14.f3 Bg2 15.Kg2 Rfa8 16.a3 (16.fe4 de4 (16...Ra2?! 17.Ra2 Ra2 18.Qb3=) 17.Qb3 R5a6–/+) 16...Qe6 (16...Rb5 17.Bc1 Qe6–/+) 17.f4 (17.fe4!? Ne4 18.Ne4 de4 19.Rf1–/+) 17...R5a6 (17...b5 18.Rf1–+) 18.Nb3 (18.c4 dc4 19.Nc3 Ba3 20.Ba3 Ra3 21.Ra3 Ra3–+) 18...Nb8 (18...Ra4 19.Rf1–+) 19.Rh1 (19.N3d2 b5–+) 19...Nbd7 20.h3 (20.Rf1 b5–+) 20...Nb6 21.Ra2 (21.N3d2 Na4 22.Ra2 b5–+) 21...Na4 (21...Nc4 22.Qe2–+) 22.Bc1 (22.Qe2 c6–+) 22...Ne8 (22...b5 23.Qe2–+) 23.g4 (23.Qc2 Nd6–+) 23...Qc6 (23...Nd6 24.N3d2–+) 24.Qd2 (24.Qc2 b5–+) 24...Rb6 (24...Rb6 25.Qd1 Qc4–+ (25...Nc3?! 26.Nc3 Qc3 27.Nc5–+)) 0–1. rasputin – pcmvr (1820), internet, 2005.

4.Nf3 e6

5.a4 A) 5...b6 6.Nc3 (6.e3 Nc6 7.Nc3 Bb7 8.Nb5 Bc5 9.Be2 0–0 10.0–0; 6.Na3 Ra4 7.e3 Nc6 8.Be2 Bc5 9.0–0 0–0 10.Nb5; 6.g3 Nc6 7.Nc3 Be7 8.e4 0–0 9.Bb5 Bb7 10.0–0; 6.Bc3 Rh5 7.e3 Nc6 8.h4 h6 9.Bd3 Bb7 10.Na3; 6.h4 Nc6 7.e3 Be7 8.Be2 0–0 9.Nc3 Bb7 10.0–0; 6.h3 Nc6 7.e3 Bb7 8.Nc3 Nb4 9.Be2 Be7 10.0–0) 6...Nc6 7.e3 Bb7 8.Bc4 Bb4 9.0–0 0–0 10.Qe2; B) 5...Rh5 6.Nc3 (6.e3 Nc6 7.Nc3 Bb4 8.Be2 0–0 9.0–0 h6 10.Nd4; 6.h4 Nc6 7.e3 Be7 8.Nc3 0–0 9.Be2 Rh6 10.0–0; 6.Na3 Nc6 7.e3 Bc5 8.Nb5 0–0 9.Bf6 Qf6 10.Nc7; 6.h3 Nc6 7.e3 Bc5 8.Nc3 0–0 9.Be2 d5 10.0–0; 6.a5 Nc6 7.Nc3 Bd6 8.e3 0–0 9.Be2 Bb4 10.0–0) 6...Nc6 7.e3 b6 8.Nb5 Bb7 9.h3 h6 10.Bd3; C) 5...d5 6.Nc3 (6.e3 Nc6 7.Nc3 Bc5 8.Be2 0–0 9.d4 Bb4 10.0–0; 6.g3 Bc5 7.Nc3 d4 8.Nb5 Nc6 9.Bg2 0–0 10.0–0; 6.Na3 Ra4 7.c4 Ra5 8.e3 Be7 9.cd5 ed5 10.Bc3) 6...Nc6 7.g3 e5 8.Nb5 Bc5 9.Bg2 d4 10.c3; D) 5...Be7 6.Nc3 (6.e3 Nc6 7.Nc3 0–0 8.Be2 h6 9.0–0 b6 10.Nb5; 6.g3 b6 7.Bg2 Nc6 8.0–0 0–0 9.Nc3 Ba6 10.Qc1; 6.Na3 Ra4 7.e3 Nc6 8.Nb5 Ra1 9.Qa1 Nb4 10.Qa5) 6...Nc6 7.e3 0–0 8.Bb5 b6 9.0–0 Bb7 10.Re1; E) 5...Nc6 6.Nc3 (6.e3 Bc5 7.Nc3 0–0 8.Bb5 d5 9.0–0 Bd7 10.d4; 6.g3 Bc5 7.Nc3 0–0 8.Bg2 e5 9.Nb5 d5 10.0–0; 6.h3 Bc5 7.e3 0–0 8.Bb5 d5 9.Nc3 Nb4 10.0–0) 6...Bc5 7.g3 0–0 8.Bg2 e5 9.0–0 e4 10.Ng5.

5.Nc3 A) 5...Nc6 6.e4 (6.e3 d5 7.Nb5 Be7 8.Bc3 Ra4 9.Bd3 0–0 10.Ne5) 6...Bc5 7.e5 Nd5 8.Nd5 ed5 9.Be2 0–0 10.0–0; B) 5...d5 6.e3 (6.a4 Nc6 7.g3 Bb4 8.Bg2 0–0 9.0–0 h6 10.Nb5) 6...Nc6 7.Be2 Bb4 8.Nb5 Ne4 9.a4 0–0 10.0–0; C) 5...b6 6.e4 (6.e3 Nc6 7.Bd3 Be7 8.0–0 Bb7 9.a3 0–0 10.Qe2; 6.a4 Nc6 7.e3 Bb7 8.Nb5 Be7 9.Be2 0–0 10.0–0) 6...Bb7 7.Bc4 Ne4 8.Ne4 Be4 9.0–0 d5 10.Be2; D) 5...Bb4 6.a3 (6.e3 0–0 7.a3 Be7 8.d4 Nc6 9.Bd3 h6 10.0–0; 6.e4 Nc6 7.Bd3 0–0 8.0–0 d6 9.Qe2 Bd7 10.a4; 6.h3 0–0 7.e3 d5 8.a3 Be7 9.Bb5 Bd7 10.Qe2) 6...Be7 7.e4 0–0 8.e5 Nd5 9.Nd5 ed5 10.d4; E) 5...h6 6.e3 (6.e4 Nc6 7.Bb5 Bc5 8.0–0 0–0 9.e5 Nd5 10.a4; 6.a3 Nc6 7.e4 Be7 8.Bd3 0–0 9.0–0 b6 10.Qe2; 6.a4 Nc6 7.e4 Be7 8.Bd3 0–0 9.0–0 Nb4 10.Qe2) 6...Nc6 7.Bd3 Be7 8.0–0 0–0 9.a4 Nb4 10.Be2; F) 5...Bc5 6.e3 (6.d4 Bb4 7.a3 Be7 8.e4 d6 9.Bd3 0–0 10.0–0; 6.e4 Nc6 7.e5 Nh5 8.Ne4 Be7 9.Bc3 Ra4 10.d4) 6...0–0 7.d4 Be7 8.Bd3 Nc6 9.a3 h6 10.0–0; G) 5...Bd6 6.e4 (6.e3 Nc6 7.Bd3 0–0 8.0–0 Bc5 9.Qe2 e5 10.h3; 6.d4 Nc6 7.e3 0–0 8.Bd3 Nb4 9.0–0 Nd3 10.Qd3; 6.a4 Nc6 7.Nb5 Bc5 8.e3 0–0 9.Be2 d5 10.0–0; 6.g4 h6 7.e3 Nc6 8.Nb5 Bc5 9.Nfd4 Ra4 10.Rg1; 6.h4 Nc6 7.e3 0–0 8.Be2 b6 9.Nb5 Be7 10.0–0) 6...Nc6 7.Bb5 0–0 8.0–0 e5 9.Qe2 Nd4 10.Qd3; H) 5...h5 6.e3 (6.e4 Nc6 7.Bb5 Bc5 8.Qe2 0–0 9.e5 Nd5 10.Nd5; 6.h3 Nc6 7.e3 d5 8.Nb5 Bc5 9.Bc3 Bb4 10.Bb4; 6.a4 Be7 7.e4 Nc6 8.Bd3 0–0 9.0–0 Nb4 10.Qe2; 6.h4 Nc6 7.e3 Be7 8.Nb5 0–0 9.Bc3 Ra4 10.Ng5; 6.a3 Be7 7.e3 0–0 8.Bd3 Na6 9.0–0 Nc5 10.Be2; 6.d4 Nc6 7.e3 b6 8.Bd3 Nb4 9.Be2 Bb7 10.0–0) 6...Nc6 7.a3 d5 8.Nb5 Bc5 9.Bf6 gf6 10.d4; I) 5...Be7 6.e3 (6.e4 Nc6 7.Bd3 0–0 8.0–0 Nb4 9.Be2 b6 10.e5; 6.h3 Nc6 7.e3 0–0 8.Bb5 b6 9.0–0 Bb7 10.Re1; 6.a4 Nc6 7.g3 0–0 8.Bg2 Rh5 9.0–0 d5 10.d4; 6.Rb1 0–0 7.e3 Nc6 8.Bb5 b6 9.0–0 Bb7 10.h3; 6.g3 Nc6 7.a4 0–0 8.Bg2 Rh5 9.d4 d5 10.0–0) 6...d5 7.Bd3 Nc6 8.Nb5 0–0 9.0–0 Nb4 10.a4.

5.d3 Be7 6.Nbd2 Nc6 7.g3 0–0 8.Bg2 b6 9.0–0 Bb7 10.c4 d5 11.Qc2 dc4 12.Nc4 Ra8 13.a3 Rb8 14.Bc3 h6 15.Rfb1 Bd6 16.e4 e5 17.Ne3 Nd4 18.Bd4 ed4 19.Nd4 Re8 20.Ndf5 Qd7 21.Qb3 Kh7 22.Ra2 g6 23.Nh4 Bc8 24.Nc4 Qe6 25.Rab2 Ng4 26.Qd1 h5 27.Qe2 Ne5 28.Ne3 Bc5 29.Nd5 Qd6 30.Nf3 Nf3 31.Bf3 Be6 32.Nb4 Bb4 33.Rb4 c5 34.R4b2 f5 35.a4 fe4 36.de4 (36.Qe4?! Ba2 37.Ra2 Re4 38.Be4 Rf8=) 1–0. linakip – sonmi21, kurnik, 2012.

5.e3 Bb4 6.Nc3 (6.Bd3 Nc6 7.Nc3 0–0 8.0–0 d5 9.a3 Be7 10.Nb5; 6.a3 Be7 7.Nc3 0–0 8.d4 Nc6 9.Bd3 d5 10.0–0; 6.h3 0–0 7.Nc3 Nc6 8.a3 Be7 9.d4 h6 10.Bd3; 6.h4 Nc6 7.Nc3 0–0 8.a3 Be7 9.Be2 d5 10.0–0; 6.Bc3 Nc6 7.a3 Bc3 8.Nc3 0–0 9.Bb5 b6 10.0–0; 6.Bc4 d5 7.Bd3 Nc6 8.0–0 0–0 9.Qe2 Bd7 10.a3; 6.Be2 Nc6 7.a3 Be7 8.Nc3 0–0 9.0–0 d5 10.a4) 6...0–0 7.Bd3 Nc6 8.Nb5 d5 9.a3 Be7 10.Bc3.

5.e3 b6 6.Nc3 (6.Bd3 Nc6 7.Nc3 Be7 8.0–0 0–0 9.a3 Bb7 10.Qe2; 6.Bc4 Nc6 7.Nc3 Be7 8.0–0 0–0 9.Nb5 d5 10.Be2; 6.Ne5 Bb7 7.Bc3 Ra8 8.Bb5 Bg2 9.Rg1 Bb7 10.d3; 6.Be2 Nc6 7.Nc3 Be7 8.Nb5 0–0 9.0–0 Bb7 10.h3; 6.h3 Nc6 7.Nc3 Be7 8.Bb5 Bb7 9.0–0 0–0 10.Re1; 6.Bc3 Rh5 7.Bf6 Qf6 8.Nc3 Nc6 9.Nb5 Kd8 10.Nfd4; 6.h4 Nc6 7.Nc3 Bb7 8.Nb5 Bc5 9.Be2 0–0 10.0–0; 6.a4 Nc6 7.Nc3 Be7 8.Bb5 Bb7 9.0–0 0–0 10.d4; 6.a3 Be7 7.Nc3 0–0 8.Bb5 Nc6 9.0–0 h6 10.Qe2; 6.g3 Nc6 7.Nc3 Bb7 8.Be2 Be7 9.0–0 0–0 10.a4; 6.Qc1 Nc6 7.Na3 Bc5 8.Bd3 Bb7 9.Nc4 Ra4 10.0–0; 6.d4 Nc6 7.Nc3 Bb7 8.a3 Qa8 9.a4 Nb4 10.Be2) 6...Nc6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5 10.Nb5.

5.e3 Bc5 6.d4 (6.Nc3 Nc6 7.d4 Be7 8.Bd3 0–0 9.0–0 b6 10.a3) 6...Be7 7.Bd3 Nc6 8.Nc3 0–0 9.0–0 b6 10.a3.

5.e3 Nc6 6.Nc3 (6.Be2 Be7 7.Nc3 0–0 8.0–0 b6 9.a4 Bb7 10.h3; 6.h3 Bc5 7.Nc3 0–0 8.d4 Bb6 9.Be2 d6 10.0–0; 6.Bd3 Bc5 7.Nc3 0–0 8.0–0 e5 9.a4 d6 10.Bb5; 6.a4 Bc5 7.Nc3 0–0 8.Be2 e5 9.Nb5 Re8 10.0–0; 6.a3 d5 7.Nc3 Bd6 8.Nb5 0–0 9.Bc3 Ra8 10.Bd3; 6.g3 e5 7.Be2 Be7 8.0–0 0–0 9.Nc3 e4 10.Nd4; 6.h4 Be7 7.Nc3 0–0 8.Be2 b6 9.0–0 Bb7 10.a4; 6.Bc4 b5 7.Bd3 b4 8.a3 Bc5 9.0–0 0–0 10.c3) 6...d5 7.Be2 Be7 8.0–0 0–0 9.a4 Bd7 10.d3.

5.e3 d5 6.c4 (6.Nc3 Nc6 7.Nb5 Be7 8.Bc3 Ra4 9.Bd3 0–0 10.Ne5; 6.Bd3 Nc6 7.0–0 Bd6 8.Nc3 0–0 9.Qe2 h6 10.e4; 6.h3 Nc6 7.Nc3 Bd7 8.Be2 Be7 9.0–0 0–0 10.d4; 6.Bc3 Ra8 7.Bd3 Nc6 8.0–0 Bc5 9.Ne5 0–0 10.Qf3; 6.Be2 Nc6 7.Nc3 Bb4 8.a3 Bc5 9.d4 Bd6 10.0–0; 6.a4 Nc6 7.Nc3 Bc5 8.Be2 0–0 9.0–0 Bd7 10.Nb5; 6.h4 Nc6 7.Nc3 Bc5 8.d4 Bd6 9.Bd3 0–0 10.Nb5; 6.a3 Nc6 7.Nc3 Bd6 8.Nb5 0–0 9.Bc3 Ra4 10.Nd6; 6.g3 Nc6 7.Nc3 Bd7 8.Be2 Be7 9.0–0 0–0 10.Nb5) 6...Bd6 (6...Nc6 7.Nc3 Be7 8.Be2 0–0 9.0–0 b6 10.cd5) 7.Bc3 (7.d4 b6 8.cd5 ed5 9.Nc3 0–0 10.Bb5) 7...Ra8 8.cd5 (8.Be5 Nc6 (8...Be5 9.Ne5 d4 10.Qf3) 9.Bd6 (9.Bf6 Qf6 10.Nc3) 9...Qd6= 10.Nc3) 8...ed5+= 9.Be2 (9.Bf6 Qf6 10.Nc3) 9...0–0 (9...Nbd7 10.Bf6) 10.0–0 c5 (10...Re8 11.Qc2+=) 11.Qb3 Nc6 12.Bb2 (12.Qb2 Be7+=) 12...Re8+= 13.Bb5 (13.Rc1 c4 14.Qd1 Bf5+=) 13...Bd7 14.Nc3 c4 15.Qd1 Ne5 (15...Nb4 16.Bd7 Qd7 17.Ne1–/+) 16.Ne5 Be5 17.Bd7 Qd7 18.f4 Bc7 19.Qf3 (19.Ne2 Ne4–/+) 19...b5 (19...d4 20.Nd1 Bb6 21.Qe2–/+) 20.a3 Red8 (20...d4 21.Ne2 d3 22.Ng3–/+) 21.Ne2 (21.Rab1 Ne4 22.Ne4 de4 23.Qe4 Qd2+=) 21...Ne4–/+ 22.Rfd1 Nc5 (22...Ba5 23.Nc3–/+) 23.Qg3+= f5 24.Nd4 g6 25.Qh4 Bd6 26.Nb5 (26.Nf3 Nd3 27.Qf6 Nb2 28.Qb2 Ra5–/+) 26...Be7–/+ (26...Qb5?! 27.Qf6 Qb7 28.Rdb1=) 27.Qh6 Bf8 28.Qg5? (better is 28.Qh4 Qb5 29.Qf6–/+) 28...Ne4 (28...Qb5?! 29.Qf6 Qa6 30.Qh8 Kf7 31.Qh7 Ke8 32.Rdb1–/+) 29.Qh4 Qb5 30.Bf6 (30.Bd4 Rdb8 31.g4 fg4 (31...Ba3?! 32.Ra3 Ra3 33.Qe7–/+) 32.Qg4 Qc6–+ (32...Ba3?! 33.Qe6 Kf8 34.Qe5–+)) 30...Nf6 (30...Nf6 31.Qf6 Qd7–+) 0–1. fraus (2110) – moonlightconcert (2540), net–chess.com, 2002.

5.e3 Bd6 6.a4 (6.Nc3 Nc6 7.Bd3 Nb4 8.Bc4 0–0 9.0–0 b6 10.Nb5; 6.Bc4 b5 7.Bd3 b4 8.a3 Nc6 9.c3 bc3 10.Nc3; 6.Bd3 Na6 7.Nc3 Nc5 8.Be2 0–0 9.0–0 b6 10.Nb5; 6.Qc1 Bb4 7.Na3 Nc6 8.Nc4 Rh5 9.a3 Bc5 10.d4; 6.Be2 Nc6 7.Nc3 0–0 8.0–0 b6 9.Nb5 Be7 10.c4; 6.g3 Nc6 7.Nc3 0–0 8.Be2 b6 9.Nb5 Be7 10.0–0; 6.a3 Nc6 7.Nc3 0–0 8.Bd3 Bc5 9.Nb5 d5 10.0–0; 6.g4 Nc6 7.g5 Ne4 8.Bg7 Rg8 9.Bc3 Rag5 10.Ng5; 6.h4 Nc6 7.Nc3 0–0 8.Bd3 Nb4 9.Be2 b6 10.a3; 6.Bc3 Ra8 7.Bb2 Nc6 8.Nc3 0–0 9.Be2 Be7 10.0–0) 6...0–0 7.Na3 Ra4 8.Nb5 Ra1 9.Qa1 Be7 10.Be2.

5.e3 Be7 6.Nc3 (6.Bd3 0–0 7.0–0 Nc6 8.Nc3 e5 9.e4 d5 10.ed5; 6.Bc4 b5 7.Bd3 b4 8.0–0 Nc6 9.a3 Bb7 10.ab4; 6.h3 Nc6 7.Nc3 0–0 8.Bb5 b6 9.0–0 Bb7 10.Re1; 6.d4 Nc6 7.Nc3 0–0 8.Be2 b6 9.0–0 h6 10.Qd2; 6.a4 Nc6 7.Nc3 0–0 8.Bb5 b6 9.0–0 Bb7 10.d4; 6.Be2 0–0 7.Nc3 Nc6 8.0–0 b6 9.Nb5 Bb7 10.h3; 6.a3 Nc6 7.Nc3 0–0 8.Bb5 h6 9.0–0 d5 10.Qe2; 6.g3 Nc6 7.Nc3 0–0 8.Bb5 d6 9.0–0 e5 10.d4) 6...0–0 7.Bd3 Nc6 8.0–0 d5 9.Nb5 Nb4 10.a4.

5.e3 h5 6.Nc3 (6.Bd3 Na6 7.Nc3 Nb4 8.Be2 Bc5 9.0–0 0–0 10.h4; 6.a3 Be7 7.Nc3 0–0 8.Bd3 Na6 9.Be2 b6 10.0–0; 6.a4 Nc6 7.Nc3 Bc5 8.Be2 0–0 9.0–0 d5 10.Ng5; 6.d4 Nc6 7.Nc3 Be7 8.Bd3 0–0 9.0–0 b6 10.a3; 6.h4 Nc6 7.Nc3 Bc5 8.Be2 d5 9.0–0 Ng4 10.Nb5; 6.Be2 Nc6 7.Nc3 Be7 8.0–0 0–0 9.a4 d5 10.h3) 6...Nc6 7.h3 Be7 8.Bd3 d5 9.0–0 0–0 10.Ne2.

5.e3 h6 6.Nc3 (6.Bd3 Nc6 7.Nc3 Be7 8.0–0 0–0 9.Nd4 e5 10.Nc6; 6.a4 Nc6 7.Nc3 Be7 8.Bd3 Nb4 9.0–0 0–0 10.Be2) 6...Nc6 7.Bd3 Nb4 8.Bb5 Be7 9.0–0 0–0 10.Nd4.

5.g3 A) 5...d5 6.Bg2 (6.e3 Nc6 7.Nc3 Bd7 8.Bg2 e5 9.d4 e4 10.Ne5; 6.a4 Bc5 7.Bg2 Nc6 8.d4 Bb4 9.Nc3 0–0 10.0–0) 6...Nc6 7.0–0 Bd6 8.a4 e5 9.d4 e4 10.Ne5; B) 5...Be7 6.e3 (6.Nc3 0–0 7.Bg2 Nc6 8.0–0 h6 9.a4 d5 10.Nb5; 6.Bg2 Rb5 7.Bf6 Bf6 8.Nc3 Ra5 9.d4 Nc6 10.a4; 6.a4 b6 7.Nc3 Nc6 8.e4 Nb4 9.Bb5 c6 10.Be2; 6.Bh3 Nc6 7.Nc3 Rh5 8.Bg2 0–0 9.0–0 d5 10.d4) 6...Nc6 7.Nc3 0–0 8.Bb5 d6 9.0–0 e5 10.d4; C) 5...Bd6 6.Bc3 (6.Nc3 Nc6 7.a4 0–0 8.Bg2 Bb4 9.0–0 d5 10.Nb5; 6.a4 Nc6 7.Nc3 Rh5 8.Bg2 0–0 9.0–0 Be7 10.Nb5; 6.Bg2 Nc6 7.Nc3 b6 8.0–0 0–0 9.a4 Ba6 10.Qc1; 6.e3 Nc6 7.Nc3 0–0 8.Be2 b6 9.0–0 Bb7 10.Nb5; 6.c4 Nc6 7.Nc3 b6 8.Bg2 Ba6 9.Qb3 0–0 10.0–0; 6.e4 Ne4 7.Nc3 Ba3 8.Ba3 Nc3 9.dc3 Ra3 10.Qd4) 6...Ra8 7.Bf6 gf6 8.Nc3 Nc6 9.e3 Rg8 10.Bb5; D) 5...h6 6.Nc3 (6.e3 Nc6 7.Nc3 Be7 8.Bb5 0–0 9.0–0 b6 10.e4; 6.Bg2 Nc6 7.Nc3 Bb4 8.0–0 0–0 9.a3 Be7 10.a4) 6...Nc6 7.Bg2 Bb4 8.0–0 0–0 9.a3 Be7 10.a4; E) 5...Nc6 6.Nc3 (6.Bg2 d5 7.0–0 Rb5 8.Bf6 Qf6 9.Nc3 Rb6 10.a4; 6.e3 e5 7.Be2 Be7 8.Nc3 0–0 9.0–0 e4 10.Nd4; 6.a4 g5 7.Nc3 g4 8.Nh4 Ne5 9.e3 Ng6 10.Bd3; 6.Bh3 g5 7.Bg2 Rb5 8.Qc1 g4 9.Nd4 Rb6 10.Nc6; 6.d4 Rb5 7.Qc1 Ne4 8.e3 Rb6 9.Bd3 Ng5 10.Ng5) 6...b6 7.e4 Bb7 8.Bc4 Ne4 9.Ne4 d5 10.Qe2.

3.Bb2 h5

4.Nc3 Nc6 A) 5.e3 Nf6 (5...e5 6.Nf3 Nf6 7.Nb5 d6 8.Bc4 Bf5 9.0–0 h4; 5...d5 6.Nf3 Nf6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...e6 6.Nf3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.Qe2 Nb4) 6.Nf3 e5 7.Bb5 Be7 8.0–0 0–0 9.e4 Bc5; B) 5.e4 Nf6 (5...e6 6.Nf3 Nf6 7.a4 Bb4 8.Bd3 0–0 9.0–0 b6; 5...e5 6.Nf3 Nf6 7.Bc4 Bc5 8.0–0 0–0 9.h3 d6) 6.Nf3 e5 7.Bc4 Bc5 8.0–0 0–0 9.h3 d6; C) 5.Nf3 Nf6 (5...d5 6.e3 Nf6 7.a4 g6 8.Nb5 Bg7 9.Bc3 Ra8; 5...e6 6.e3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.Qe2 Nb4; 5...e5 6.e4 Nf6 7.Bc4 Bc5 8.h3 0–0 9.0–0 d6) 6.e3 e5 7.Nb5 d6 8.Be2 Be7 9.d4 e4.

4.Nc3 d5 A) 5.Nf3 d4 (5...Nc6 6.e3 Nf6 7.Bb5 e6 8.Ne5 Bd7 9.Nd7 Qd7; 5...Nf6 6.e3 Nc6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4) 6.Ne4 Nc6 7.e3 de3 8.fe3 Nf6 9.Nf6 ef6; B) 5.e3 Nc6 (5...Nf6 6.Nf3 Nc6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...Bd7 6.Nf3 Nf6 7.Be2 Nc6 8.0–0 e6 9.Ng5 Ng4; 5...e6 6.Nf3 Nc6 7.Bd3 Nf6 8.0–0 Bc5 9.Ne2 0–0; 5...h4 6.Nf3 h3 7.gh3 Nf6 8.Ne2 Nc6 9.Nf4 Qd6) 6.Nf3 Nf6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4.

4.Nc3 e6 A) 5.Nf3 Nf6 (5...Nc6 6.e3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.Qe2 Nb4; 5...Be7 6.e4 Nc6 7.Bd3 Nf6 8.0–0 0–0 9.Qe2 Nb4; 5...h4 6.e4 Nc6 7.h3 Nf6 8.Bb5 Bc5 9.0–0 Nd4) 6.e3 Be7 7.Bd3 Na6 8.Nd4 Nb4 9.Bb5 Nc6; B) 5.e4 Nc6 (5...Nf6 6.Nf3 Nc6 7.a4 Be7 8.Bd3 0–0 9.0–0 Nb4; 5...Be7 6.Nf3 Nc6 7.Bb5 Nf6 8.0–0 0–0 9.Qe2 d6; 5...Bb4 6.a3 Be7 7.Nf3 Nc6 8.d4 d5 9.Bd3 de4) 6.Nf3 Nf6 7.a4 Be7 8.Bd3 0–0 9.0–0 Nb4; C) 5.h3 Nc6 (5...Nf6 6.Nf3 Nc6 7.e4 Bc5 8.e5 Nd5 9.Nd5 ed5; 5...Be7 6.Nf3 Nf6 7.e4 Nc6 8.Bb5 0–0 9.0–0 d5; 5...d5 6.e4 Nf6 7.ed5 ed5 8.Nf3 Bd6 9.Bb5 Bd7; 5...Bc5 6.Ne4 Nf6 7.Nc5 Rc5 8.e3 Nc6 9.Nf3 d6) 6.Nf3 Nf6 7.e3 Be7 8.Bd3 0–0 9.0–0 Nb4; D) 5.e3 Nf6 (5...Nc6 6.Nh3 Nf6 7.Be2 d5 8.0–0 e5 9.Ng5 Ng4; 5...h4 6.Nf3 Nc6 7.h3 Nf6 8.Be2 Be7 9.0–0 Rah5; 5...d5 6.Nf3 Nf6 7.Bd3 Nc6 8.0–0 Bc5 9.Ne2 0–0) 6.Nf3 Be7 7.Bd3 Nc6 8.0–0 0–0 9.Qe2 Nb4.

4.Nc3 Nf6 A) 5.e3 Nc6 (5...d5 6.Nf3 Nc6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...d6 6.Nf3 Nc6 7.Bb5 g6 8.0–0 Bg7 9.h3 0–0; 5...e6 6.Nf3 Be7 7.Bb5 Nc6 8.0–0 0–0 9.Qe2 d5; 5...b6 6.Nf3 Nc6 7.Bc4 e6 8.0–0 Be7 9.Nb5 0–0) 6.Nf3 d5 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; B) 5.e4 d5 (5...Nc6 6.Nf3 e6 7.Bb5 Bc5 8.0–0 Nd4 9.Bd3 d6; 5...h4 6.Nf3 Nc6 7.h3 e6 8.Bb5 Bc5 9.0–0 Nd4; 5...e6 6.Nf3 Nc6 7.Bb5 Bc5 8.0–0 Nd4 9.Bd3 d6) 6.ed5 Nd5 7.Nf3 Nc6 8.Bc4 Be6 9.Bb3 Nf4; C) 5.Nf3 Nc6 (5...e5 6.e4 Nc6 7.Bc4 Bc5 8.0–0 0–0 9.h3 d6; 5...d5 6.e3 Nc6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...e6 6.e3 Nc6 7.Bd3 Be7 8.0–0 0–0 9.Qe2 Nb4) 6.e3 d5 7.a4 g6 8.Nb5 Bg7 9.Bc3 Ra8.

4.c4 Nc6 A) 5.Nf3 Nf6 (5...e5 6.Nc3 Nf6 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6) 6.Nc3 e5 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6; B) 5.e3 Nf6 (5...e5 6.Nc3 Be7 7.Nb5 Nf6 8.Nf3 e4 9.Ng5 0–0) 6.Nc3 e5 7.Nb5 Be7 8.Nf3 e4 9.Ng5 0–0; C) 5.Nc3 e5 (5...Nf6 6.Nf3 e5 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6) 6.Nf3 Nf6 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6.

4.c4 d6 A) 5.Nc3 Nf6 (5...h4 6.e3 Nf6 7.Nf3 h3 8.gh3 Bh3 9.Bh3 Rh3; 5...Na6 6.Nf3 Nf6 7.e3 Bd7 8.Be2 Nc5 9.d4 Nce4; 5...Nd7 6.Nf3 Ngf6 7.e3 h4 8.h3 Ne5 9.Be2 g6; 5...Nc6 6.Nf3 Nf6 7.Qb3 e5 8.e4 Nd7 9.Na4 Be7; 5...e5 6.Nf3 Nf6 7.Qb3 Be7 8.Nd5 0–0 9.Bc3 Ra8; 5...b6 6.Nf3 Nf6 7.g3 Nc6 8.Bg2 Be6 9.d3 g6) 6.Nf3 h4 7.e3 h3 8.gh3 Bh3 9.Bh3 Rh3; B) 5.e3 e5 (5...Nf6 6.Nf3 Nc6 7.Nc3 e5 8.Bd3 Qe7 9.Ng5 Nb4; 5...Nc6 6.Nc3 Nf6 7.Nf3 e5 8.Bd3 Qe7 9.Ng5 Nb4; 5...b6 6.Nc3 Nf6 7.Nf3 Nc6 8.Qb3 Bb7 9.Be2 Ne5; 5...Bf5 6.Nf3 Nf6 7.Nc3 Nc6 8.Qb3 Qc8 9.Be2 e6; 5...h4 6.Nc3 Nf6 7.h3 Nc6 8.Nf3 Rhh5 9.Be2 g6; 5...Bg4 6.Nf3 Nf6 7.Nc3 Na6 8.Be2 Nc5 9.0–0 Qd7) 6.Nf3 Nf6 7.Qc2 Be7 8.Nc3 0–0 9.Ng5 Nc6; C) 5.d3 Nf6 (5...Nc6 6.Nf3 Nf6 7.Nc3 e5 8.Qb3 Be7 9.g3 0–0; 5...e5 6.Nf3 Nc6 7.g3 Nf6 8.Bg2 Be7 9.0–0 0–0; 5...Bf5 6.Nf3 Nf6 7.Nc3 Nc6 8.Nb5 e5 9.e4 Bd7; 5...Bd7 6.Nc3 Na6 7.Nf3 Nf6 8.g3 Nc5 9.Bg2 g6; 5...h4 6.Nf3 Nf6 7.Nc3 Nc6 8.Qb3 Ra6 9.Rb1 Rh5; 5...Bg4 6.h3 Bd7 7.Nf3 Nf6 8.Qd2 Nc6 9.Nc3 e5) 6.Nf3 Nc6 7.Nc3 g6 8.g3 Bg7 9.Nb5 0–0; D) 5.Nf3 Nf6 (5...Nc6 6.Nc3 Ne5 7.Ne5 de5 8.Qc2 Nf6 9.e3 g6; 5...h4 6.Nc3 Nf6 7.e3 h3 8.gh3 Bh3 9.Bh3 Rh3; 5...b6 6.Bc3 Ra7 7.a4 Nf6 8.Na3 Ne4 9.Nb5 Nc3) 6.Nc3 Nc6 7.Qb3 e5 8.e4 Be7 9.Bd3 0–0.

4.c4 e6 A) 5.Nc3 b6 (5...Nf6 6.e3 Be7 7.Nf3 Nc6 8.Bd3 d5 9.0–0 0–0; 5...Nc6 6.Nf3 Nf6 7.e3 Be7 8.Bd3 d5 9.0–0 0–0; 5...Ra6 6.Nf3 Nf6 7.e3 Nc6 8.Bd3 Nb4 9.Be2 Be7; 5...Be7 6.Nb5 Nf6 7.e3 c6 8.Nd4 Na6 9.Ngf3 h4; 5...Na6 6.Nf3 Nf6 7.g3 Be7 8.Bg2 0–0 9.d4 d5; 5...Ra8 6.e3 Nc6 7.Nf3 Nf6 8.Bd3 Nb4 9.Be2 Be7) 6.Nb5 Nc6 7.Nf3 Nf6 8.e3 Bb7 9.a3 h4; B) 5.e3 Rh6 (5...h4 6.Nf3 Nf6 7.Nc3 Nc6 8.Nb5 Bc5 9.Be2 h3; 5...Nc6 6.Nc3 Nf6 7.Nf3 Be7 8.Bd3 0–0 9.Qb3 Nb4; 5...Nf6 6.Nc3 Be7 7.Nf3 Nc6 8.Bd3 0–0 9.Qb3 Nb4) 6.Nf3 Nc6 7.Nc3 Nf6 8.Nb5 Be7 9.Bc3 Ra8; C) 5.Nf3 Nf6 (5...Nc6 6.Nc3 Nf6 7.e3 Be7 8.Bd3 0–0 9.0–0 d5) 6.Nc3 Nc6 7.e3 Be7 8.Bd3 Nb4 9.Be2 0–0.

4.c4 Nf6 A) 5.Nc3 Nc6 (5...e5 6.Nf3 Nc6 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6; 5...d5 6.cd5 Nd5 7.Nd5 Qd5 8.Nf3 Nc6 9.e3 e5) 6.Nf3 d5 7.cd5 Nd5 8.Nd5 Qd5 9.e3 e5; B) 5.e3 Nc6 (5...e5 6.Nc3 Nc6 7.Nb5 d5 8.Nf3 e4 9.Ng5 Ng4; 5...d6 6.Nf3 Nc6 7.Nc3 Bf5 8.Qb3 b6 9.Be2 e6; 5...Na6 6.Nf3 d6 7.Bc3 Rc5 8.d4 Rc6 9.Bd3 h4; 5...d5 6.Nc3 Nc6 7.Nd5 Nd5 8.cd5 Qd5 9.Nf3 h4) 6.Nc3 e5 7.Nb5 Be7 8.Nf3 e4 9.Ng5 0–0; C) 5.Nf3 Nc6 (5...e6 6.Nc3 Nc6 7.e3 Be7 8.Bd3 0–0 9.0–0 d5; 5...b6 6.Nc3 Nc6 7.Nb5 e6 8.e3 Bb7 9.a3 h4; 5...d5 6.Bc3 Rc5 7.cd5 Nd5 8.Bd4 Ra5 9.e4 Nf6) 6.Nc3 e5 7.Nb5 Bc5 8.e3 d6 9.Bc3 Ra6.

4.c4 h4 5.Na3 Nf6 (5...Nc6 6.Nf3 Nf6 7.Nb5 d6 8.Bc3 Ra6 9.Qc2 Rh5; 5...d6 6.Nb5 Nf6 7.Nf3 Nbd7 8.d3 Nc5 9.Qd2 Ra6; 5...d5 6.Nf3 Nf6 7.e3 Nc6 8.Nb5 h3 9.gh3 Bh3; 5...Na6 6.Nf3 Nf6 7.Nb5 Nc5 8.Qc2 d6 9.Bc3 Ra6) 6.Nb5 d6 7.Nf3 Nbd7 8.Bc3 Ra6 9.Qc2 Nc5.

4.c4 h4 5.Qb3 Nf6 (5...Nc6 6.Nf3 Nf6 7.Nc3 e6 8.Nb5 b6 9.e3 Bb7; 5...e6 6.Nc3 Nf6 7.Nf3 Nc6 8.e3 b6 9.h3 Bb7; 5...Na6 6.Nf3 Nc5 7.Qc2 Nf6 8.Nc3 b6 9.d4 Ne6; 5...d6 6.Nc3 Nd7 7.Nf3 Ngf6 8.d4 b6 9.h3 Bb7; 5...Ra6 6.Nf3 Nc6 7.Nc3 d6 8.e3 Rb6 9.Nb5 Rh5) 6.Nf3 Nc6 7.Nc3 e6 8.Nb5 b6 9.Bc3 Ra8.

4.c4 h4 5.Nc3 Nf6 (5...Nc6 6.Nf3 Nf6 7.e3 Rhh5 8.Qb3 e5 9.Nb5 Be7; 5...d6 6.Nf3 Nf6 7.e3 Nbd7 8.h3 b6 9.Be2 Bb7; 5...e6 6.Nf3 Nf6 7.Nb5 Nc6 8.e3 Rh5 9.Qb3 Ra6; 5...b6 6.Nb5 Nf6 7.Nf3 Nc6 8.e3 d6 9.Ng5 Bb7) 6.Nf3 d6 7.e3 Na6 8.h3 Bf5 9.Nd4 Bd7.

4.c4 h4 5.d4 e6 (5...d6 6.Nf3 Nf6 7.Nc3 Bf5 8.Qb3 Qc8 9.Rd1 Nc6; 5...Nf6 6.Nf3 e6 7.Nc3 Nc6 8.Qb3 Ra6 9.a3 Be7) 6.Nf3 g5 (6...d5 7.c5= (7.cd5 ed5 8.Ne5 Nf6 9.Qd2 c6) 7...Nf6 8.Nc3 Nc6 9.e3 Be7; 6...Nc6 7.d5 ed5 8.cd5 Nb4 9.e4 Qe7) 7.Bc3 (7.d5 Nf6 8.Qd2 b6 9.Ng5 Rh5) 7...c6 (7...Rf5 8.d5 Nf6 9.Nd4 Rf4) 8.Ba5+/– (8.c5 d6 9.Qd2 Ra8) 8...Qa5 9.Nfd2 (9.Nbd2 Nf6+/– (9...g4 10.Ne5 d6+/–)) 9...Bg7+= (9...c5–/+) 10.e3 c5 11.Be2?? (better is 11.Bd3+/–) 11...cd4–+ 12.0–0 d3! 13.Ne4? (13.Bd3 Ba1) 13...de2 (13...Ba1?! 14.Nd6 Kf8 15.Qd3–+) 14.Qe2 Ba1 15.Nd6 Kf8 16.Qf3 Nf6 17.Nc8 Qc7 18.Na7 g4 (better is 18...Be5!? 19.h3 b6 20.Nb5 Qc4 21.Nd4–+) 19.Qe2 Be5 20.Nb5 Bh2 21.Kh1 Qe5 22.f4 Qh5 (22...Qh5 23.Qb2 h3–+) 0–1. Perez Perez,Francisco Jose (2085) – Hernandez,Barbaro, Havana–ch sf region, 1998.

4.c4 h4 5.e3 Nf6 (5...d6 6.Nc3 Nf6 7.Nf3 h3 8.gh3 Na6 9.d4 Bh3; 5...Nc6 6.Nc3 Nf6 7.Nf3 d6 8.Qb3 h3 9.gh3 Rf5) 6.Nc3 d6 7.Nf3 h3 8.gh3 Bh3 9.Bh3 Rh3.

4.c4 h4 5.Nf3 Nf6 (5...Nc6 6.Nc3 d6 7.e3 Nf6 8.Qb3 h3 9.gh3 Rf5; 5...e6 6.Nc3 Nf6 7.Nb5 Nc6 8.e3 b6 9.Ng5 Bb7; 5...d6 6.Qb3 Nf6 7.Nc3 Nbd7 8.d4 b6 9.h3 Bb7) 6.Nc3 Nc6 7.e3 d6 8.Qb3 Rhh5 9.h3 Be6.

4.e3 Nc6 A) 5.Nf3 Nf6 (5...e5 6.Nc3 Nf6 7.Nb5 d6 8.c4 Bf5 9.Be2 Be7; 5...d5 6.Nc3 Nf6 7.a4 g6 8.Nb5 Bg7 9.Bc3 Ra8; 5...h4 6.Nc3 Nf6 7.h3 e5 8.Nb5 d6 9.Be2 Bf5) 6.Nc3 e5 7.Nb5 d6 8.Be2 Be7 9.0–0 0–0; B) 5.Nc3 e6 (5...d5 6.Bb5 Nf6 7.Nf3 e6 8.Ne5 Bd7 9.Nd7 Qd7; 5...Nf6 6.Nf3 e5 7.Nb5 d6 8.Bc4 e4 9.Nfd4 Ne5; 5...e5 6.Nf3 Nf6 7.Nb5 d6 8.Be2 Be7 9.0–0 0–0) 6.Nf3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.Qe2 Nb4.

4.e3 d5 A) 5.Nc3 Nf6 (5...Nc6 6.Bb5 Nf6 7.Nf3 e6 8.Ne5 Bd7 9.Nd7 Qd7; 5...Bd7 6.Be2 Nf6 7.Nf3 Nc6 8.0–0 e6 9.Ng5 Be7; 5...h4 6.h3 Nf6 7.Nf3 Bd7 8.Be2 Nc6 9.0–0 e5; 5...e6 6.Nf3 Nf6 7.Bd3 Nc6 8.0–0 Bc5 9.Ne2 0–0) 6.Nf3 Nc6 7.Bb5 e6 8.Ne5 Bd7 9.Nd7 Qd7; B) 5.Be2 Nf6 (5...Nc6 6.Nf3 Nf6 7.0–0 g6 8.Na3 Bg7 9.Nb5 0–0) 6.Nf3 Nc6 7.0–0 g6 8.d4 Bg7 9.Nbd2 0–0; C) 5.Nf3 Nc6 (5...Nf6 6.Nc3 Nc6 7.Be2 g6 8.0–0 Bg7 9.Nb5 0–0; 5...e6 6.Bd3 Nc6 7.Nc3 Nf6 8.0–0 Bd7 9.e4 Bc5; 5...Bd7 6.c4 Ba4 7.Qc1 Nd7 8.cd5 Ngf6 9.Bf6 Nf6) 6.Nc3 Nf6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4.

4.e3 d6 A) 5.Nf3 Nf6 (5...Nc6 6.Nc3 Nf6 7.a4 e5 8.Bd3 d5 9.e4 Bb4; 5...Nd7 6.Nc3 Ngf6 7.Bc4 c6 8.0–0 b5 9.Bb3 b4) 6.Nc3 Nc6 7.Bb5 g6 8.d4 Bd7 9.0–0 Bg7; B) 5.Na3 Nc6 (5...Nf6 6.Nc4 Rc5 7.Bd3 Be6 8.Qe2 Nc6 9.Nf3 Nb4) 6.Nf3 Nf6 7.Be2 h4 8.h3 Bf5 9.0–0 e5; C) 5.Bd3 Nf6 (5...Nd7 6.Na3 Nc5 7.Nf3 d5 8.0–0 Nf6 9.Be2 c6; 5...Na6 6.Nf3 Nc5 7.Na3 Nf6 8.0–0 d5 9.Be2 c6; 5...Nc6 6.Nf3 Nb4 7.Be2 Nf6 8.Nc3 h4 9.h3 Bf5) 6.Nf3 Nc6 7.Nc3 Nb4 8.Bc4 d5 9.Be2 h4; D) 5.Bc4 Nc6 (5...d5 6.Bd3 Nf6 7.Nf3 Nbd7 8.Nc3 e5 9.Be2 Be7; 5...Nf6 6.Nf3 d5 7.Bd3 Nbd7 8.Nc3 e5 9.Be2 Be7; 5...Nd7 6.Nf3 Nb6 7.Bd3 Na4 8.Bd4 Nf6 9.0–0 Bd7; 5...h4 6.h3 Nf6 7.Nf3 d5 8.Be2 Nc6 9.Nc3 Bf5; 5...Rg5 6.Nf3 Rg2 7.Ne5 Rf2 8.Kf2 de5 9.Be5 Nh6) 6.Nf3 d5 7.Bd3 Nf6 8.0–0 Nb4 9.Bc3 Qd6; E) 5.h3 Nc6 (5...Nf6 6.Nc3 Nc6 7.Bb5 e5 8.Nf3 Be7 9.0–0 0–0; 5...Bd7 6.Nf3 Nf6 7.Nc3 Nc6 8.Bd3 Nb4 9.0–0 Nd3; 5...Na6 6.Nf3 Nf6 7.Nc3 Bd7 8.Be2 e5 9.0–0 Be7) 6.Nc3 Nf6 7.Nf3 Rh6 8.Bb5 Rg6 9.Nh4 Rh6; F) 5.Nc3 Nc6 (5...Nf6 6.Nf3 Nc6 7.Bb5 g6 8.0–0 Bg7 9.a4 0–0; 5...h4 6.Nf3 Nf6 7.h3 Nc6 8.Bc4 Bf5 9.0–0 e5; 5...Bd7 6.Nf3 Nf6 7.Be2 Nc6 8.0–0 h4 9.h3 Ne5; 5...Nd7 6.Nf3 Ngf6 7.d4 Nb6 8.Bd3 Be6 9.0–0 Nc4; 5...Na6 6.Nf3 Nf6 7.Be2 Bd7 8.0–0 Nc5 9.Nd4 Ra8) 6.Bb5 g6 7.Nge2 Nf6 8.Nd4 Bd7 9.Nb3 Ra8.

4.e3 e6 A) 5.Nf3 Nc6 (5...Nf6 6.Bd3 Nc6 7.Nc3 Be7 8.0–0 0–0 9.Ne4 Nb4; 5...h4 6.Nc3 Nc6 7.h3 Nf6 8.Be2 Be7 9.0–0 Rah5; 5...d5 6.Bc3 Ra8 7.Be5 Nf6 8.Nc3 Nc6 9.Bb5 Bd6) 6.Nc3 Be7 7.Bd3 Nf6 8.0–0 0–0 9.Ne4 Nb4; B) 5.Bd3 Nf6 (5...Nc6 6.Nf3 Nf6 7.Nc3 Be7 8.0–0 0–0 9.Ne4 Nb4; 5...Na6 6.Nf3 Nf6 7.Nc3 Be7 8.Nd4 Nb4 9.Bb5 Nc6; 5...h4 6.Nc3 Nf6 7.Nf3 Nc6 8.h3 b6 9.a3 Ba6; 5...b6 6.Nc3 Nc6 7.Nf3 Nf6 8.0–0 Bb7 9.Nb5 Nb4; 5...Nh6 6.Nc3 Nc6 7.Nf3 Be7 8.Nb5 0–0 9.0–0 d5; 5...d5 6.Nf3 Nc6 7.Nc3 Nf6 8.0–0 Bc5 9.Ne2 0–0) 6.Nf3 Be7 7.Nc3 Nc6 8.0–0 0–0 9.Ne4 Nb4; C) 5.Be2 Nf6 (5...Nc6 6.Nc3 Nf6 7.Nh3 d5 8.d4 Bd6 9.0–0 0–0; 5...b6 6.Nh3 Nc6 7.Nc3 Nf6 8.Nb5 Ne4 9.Nf4 Ba6; 5...Nh6 6.Nc3 Nc6 7.Nb5 Nf5 8.Nf3 Bc5 9.0–0 d5) 6.Nc3 Nc6 7.Nh3 d5 8.Nb5 Ne4 9.f3 Nd6; D) 5.Nh3 Nf6 (5...Nc6 6.Nc3 Nf6 7.Be2 d5 8.0–0 e5 9.Ng5 Ng4) 6.Nc3 Nc6 7.Bb5 b6 8.0–0 Bd6 9.f4 0–0; E) 5.Nc3 Nc6 (5...Nf6 6.Bd3 Nc6 7.Nf3 Be7 8.0–0 0–0 9.Qe2 Nb4; 5...d5 6.Nf3 Nc6 7.Bd3 Nf6 8.0–0 Bc5 9.Ne2 0–0; 5...h4 6.Nf3 Nc6 7.h3 Nf6 8.Be2 Be7 9.0–0 Rah5; 5...b6 6.Nf3 Nc6 7.Bd3 Nf6 8.a3 Ba6 9.Ba6 Ra6; 5...Be7 6.Nh3 Nc6 7.Bb5 Nf6 8.0–0 b6 9.d4 Bb7) 6.Nf3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.Ne4 Nb4.

4.e3 Nf6 A) 5.Nf3 Nc6 (5...d5 6.Nc3 Nc6 7.a4 g6 8.Bb5 Bg7 9.Nd4 Bd7) 6.Nc3 e5 7.Bb5 Be7 8.0–0 d6 9.Qe2 0–0; B) 5.Be2 Nc6 (5...e5 6.Nc3 Nc6 7.Nb5 d6 8.Nf3 Be7 9.0–0 0–0; 5...h4 6.Nf3 h3 7.g3 Nc6 8.Na3 d5 9.Nb5 Ne4; 5...e6 6.Nh3 Nc6 7.Nc3 d5 8.0–0 e5 9.Ng5 Ng4) 6.Nf3 e5 7.Nc3 Be7 8.0–0 e4 9.Nd4 Nd4; C) 5.Nc3 Nc6 (5...e5 6.Nf3 Nc6 7.Bb5 Be7 8.0–0 0–0 9.a4 d6; 5...d5 6.Nf3 Nc6 7.a4 e6 8.Nb5 Ne4 9.Be2 h4) 6.Nf3 e5 7.Bb5 Be7 8.0–0 0–0 9.a4 d6.

4.Nf3 Nc6 A) 5.e3 d6 (5...Nf6 6.Nc3 d5 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...d5 6.a4 Nf6 7.Nc3 e5 8.Nb5 e4 9.Ne5 Bb4; 5...e6 6.Nc3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5; 5...h4 6.h3 e6 7.Be2 Nf6 8.Nc3 Be7 9.0–0 Rah5; 5...e5 6.Nc3 Nf6 7.Bb5 Bc5 8.0–0 0–0 9.d4 ed4) 6.Nc3 Nf6 7.Bc4 d5 8.Bb5 e6 9.Ne5 Bd7; B) 5.Na3 d5 (5...d6 6.e3 Nf6 7.Be2 Bf5 8.0–0 h4 9.h3 Qd7; 5...Nf6 6.e3 d5 7.Nb5 e6 8.Be2 Be7 9.Bc3 Ra8) 6.e3 Nf6 7.Nb5 Ne4 8.Be2 e6 9.0–0 h4; C) 5.a4 Nf6 (5...e5 6.Nc3 Nf6 7.e4 Bc5 8.Bc4 0–0 9.h3 d6; 5...e6 6.Nc3 Nf6 7.e3 Be7 8.Bd3 Nb4 9.0–0 0–0; 5...h4 6.Nc3 Nf6 7.h3 Nb4 8.e3 e6 9.Be2 b6; 5...d6 6.e3 Nf6 7.Bb5 Bd7 8.0–0 e6 9.Ng5 d5; 5...d5 6.e3 Nf6 7.Nc3 e5 8.Nb5 e4 9.Ne5 Bb4) 6.Nc3 e5 7.e4 Bc5 8.Bc4 d6 9.0–0 0–0; D) 5.Nc3 Nf6 (5...e6 6.e3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5; 5...d5 6.e3 Nf6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4; 5...d6 6.e3 Nf6 7.Bb5 g6 8.0–0 Bg7 9.a4 0–0; 5...h4 6.e3 Nf6 7.h3 e6 8.Be2 b6 9.0–0 Bb7) 6.e3 e6 7.Bd3 Nb4 8.Be2 Bc5 9.d4 Be7.

4.Nf3 d5 A) 5.Nc3 Nf6 (5...Nc6 6.e3 Nf6 7.a4 g6 8.Nb5 Bh6 9.Bd3 0–0) 6.e3 Nc6 7.a4 g6 8.Bd3 e5 9.Bb5 Bd6; B) 5.a4 Nf6 (5...Nc6 6.Nc3 Nf6 7.e3 g6 8.Nb5 Bh6 9.Ne5 0–0; 5...h4 6.e3 Nf6 7.h3 Nbd7 8.Nc3 Nc5 9.Be2 g6; 5...e6 6.Na3 Nc6 7.e3 Nf6 8.Nb5 Bc5 9.Be2 h4; 5...Nd7 6.e3 Ngf6 7.Be2 Nb6 8.Nc3 Bg4 9.0–0 Bf3; 5...Rh6 6.e3 Nf6 7.Nc3 Nc6 8.Be2 e6 9.0–0 Be7; 5...Bd7 6.c4 Nf6 7.cd5 Nd5 8.e4 Nb4 9.Qb3 N8c6) 6.e3 Nc6 7.Nc3 e6 8.Nb5 Bb4 9.Bd3 0–0; C) 5.e3 Nf6 (5...Nc6 6.Nc3 Nf6 7.Bb5 e6 8.Ne5 Bd7 9.Nd7 Qd7) 6.Nc3 Nc6 7.a4 e5 8.Nb5 e4 9.Ne5 Bb4.

4.Nf3 d6 A) 5.Na3 Nf6 (5...Nd7 6.Nc4 Ra4 7.e3 Ngf6 8.c3 b5 9.Na3 c6; 5...Na6 6.Nc4 Ra4 7.e4 Nf6 8.e5 Nd5 9.Ng5 f6; 5...Nc6 6.e3 Nf6 7.Be2 h4 8.h3 Bf5 9.0–0 Qd7; 5...d5 6.e3 Nc6 7.Nb5 Nf6 8.c4 Bf5 9.Bf6 ef6) 6.e3 Nc6 7.Be2 Bf5 8.0–0 h4 9.h3 e5; B) 5.Nc3 Nc6 (5...Nf6 6.e4 Nc6 7.Be2 e6 8.0–0 Be7 9.h3 0–0; 5...h4 6.e4 h3 7.d4 Nf6 8.e5 hg2 9.Bg2 Nh5) 6.e4 Nf6 7.Be2 e6 8.0–0 Be7 9.d4 0–0; C) 5.g3 Nf6 (5...Nc6 6.Nc3 Nf6 7.Bg2 h4 8.Nh4 g5 9.Nf3 Bh3) 6.Nc3 Nc6 7.Bg2 h4 8.Nh4 g5 9.Nf3 Bh3; D) 5.h3 Nc6 (5...Nf6 6.Nc3 Nc6 7.e3 g6 8.Bb5 Bg7 9.0–0 0–0; 5...Na6 6.Nc3 Nf6 7.e3 Bd7 8.Be2 e5 9.0–0 Be7; 5...Nd7 6.Nc3 Ngf6 7.e3 Nc5 8.Nd4 c6 9.Be2 g6; 5...Bd7 6.Nc3 Nf6 7.e3 Nc6 8.Bb5 e5 9.0–0 Be7) 6.e3 Nf6 7.Nc3 g6 8.a4 Bg7 9.Bb5 0–0; E) 5.a4 Nf6 (5...Nc6 6.Nc3 Nf6 7.e4 g6 8.Nb5 Bh6 9.Bd3 0–0; 5...Nd7 6.Nc3 Ngf6 7.e3 Nc5 8.Be2 Bd7 9.0–0 h4; 5...Bd7 6.e3 Nf6 7.Nc3 Nc6 8.Nb5 e5 9.Be2 Be7; 5...h4 6.e3 Nf6 7.Na3 Nbd7 8.Bd4 e5 9.Bc3 Ra8) 6.e3 Bd7 7.Nc3 Nc6 8.Nb5 e5 9.Bc3 Ra8; F) 5.e3 Nc6 (5...Nf6 6.Nc3 Nc6 7.h3 g6 8.Bb5 Bg7 9.0–0 0–0) 6.Nc3 Nf6 7.Bb5 g6 8.0–0 Bg7 9.a4 0–0.

4.Nf3 e6 A) 5.e4 Nc6 (5...Nf6 6.e5 Nd5 7.Nc3 Nc6 8.Nd5 ed5 9.Be2 Bb4; 5...h4 6.Nc3 Nc6 7.h3 Nf6 8.Bd3 Nh5 9.0–0 Be7) 6.Nc3 Nf6 7.Bb5 Bc5 8.0–0 Nd4 9.Bd3 d6; B) 5.e3 Nc6 (5...Nf6 6.Nc3 Nc6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5; 5...d5 6.Nc3 Nc6 7.Bd3 Nf6 8.0–0 Bc5 9.Ne2 0–0) 6.Nc3 Nf6 7.Bd3 Nb4 8.Be2 b6 9.a3 Nc6; C) 5.a3 Nc6 (5...Nf6 6.e3 Be7 7.Nc3 0–0 8.d4 Nc6 9.Bd3 b6; 5...b6 6.Nc3 Nc6 7.e3 Nf6 8.Bd3 Bb7 9.Nb5 Na7; 5...Nh6 6.Nc3 Nc6 7.e4 Be7 8.h3 0–0 9.Bd3 d5) 6.e3 Nf6 7.Nc3 Bc5 8.d4 Be7 9.Bd3 0–0; D) 5.a4 Nf6 (5...Nc6 6.Nc3 Nf6 7.e3 Be7 8.Nb5 0–0 9.Be2 Ne4; 5...d5 6.e3 Nc6 7.Bd3 Nf6 8.Nc3 e5 9.Be2 e4) 6.Nc3 Nc6 7.e4 d5 8.e5 Ne4 9.Bb5 Bb4; E) 5.h3 Nc6 (5...Nf6 6.Nc3 Nc6 7.e3 Be7 8.Bb5 0–0 9.0–0 b6; 5...Rb5 6.Bc3 Nc6 7.e3 Rf5 8.d4 h4 9.Bd3 Rfh5; 5...d5 6.e3 Nc6 7.Nc3 Be7 8.Ne2 Nf6 9.Ned4 0–0; 5...b6 6.Nc3 Nc6 7.e4 Nf6 8.Bc4 Be7 9.0–0 0–0) 6.e3 Nf6 7.Nc3 Be7 8.Bd3 0–0 9.0–0 d5; F) 5.Nc3 Nf6 (5...Nc6 6.e3 Nf6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5; 5...Be7 6.e3 Nc6 7.Bd3 Nf6 8.0–0 0–0 9.a3 d5; 5...h4 6.e3 Nf6 7.h3 Nc6 8.Be2 Be7 9.0–0 Rah5) 6.e3 Nc6 7.Bd3 Be7 8.0–0 0–0 9.a3 d5.

4.Nf3 Nf6 A) 5.Nc3 d5 (5...Nc6 6.e3 d5 7.a4 g6 8.Bb5 Bg7 9.Nd4 Bd7; 5...e6 6.e3 Nc6 7.a3 d5 8.Nb5 Bc5 9.Bf6 gf6; 5...d6 6.e3 Nc6 7.Bb5 g6 8.Nd4 Bd7 9.Nb3 Ra8; 5...Na6 6.e3 d6 7.Be2 Nb4 8.0–0 h4 9.h3 Bf5) 6.e3 Nc6 7.Bb5 e6 8.Ne5 Bd7 9.Nd7 Qd7; B) 5.e3 e6 (5...Nc6 6.Nc3 e6 7.Bb5 b6 8.0–0 Bb7 9.Qe2 Bd6; 5...d6 6.Nc3 Nc6 7.Bb5 g6 8.0–0 Bd7 9.d4 Bg7; 5...d5 6.Nc3 Nc6 7.Be2 g6 8.0–0 Bg7 9.Nb5 0–0; 5...h4 6.Nc3 h3 7.gh3 Nc6 8.Nb5 d5 9.Bc3 Ra8; 5...g6 6.Na3 d5 7.c4 Bg7 8.Nb5 c6 9.Nbd4 0–0) 6.Nc3 Nc6 7.Bd3 Nb4 8.Be2 Be7 9.0–0 0–0.

3.d3 b6

4.Bd2 Ra8 5.Nc3 Bb7 6.e3 Nc6 7.Nf3 g6 8.Be2 Bg7 9.d4 Nf6 10.0–0 0–0 11.g3 e6 12.Bd3 Ba6 13.Ba6 Ra6 14.Qe2 Ra8 15.Ne1 Na5 16.Ng2 (16.e4 d5 17.Bg5 de4 18.Ne4 Nc6=) 16...d5–/+ 17.Nf4 c5 18.dc5 bc5 19.h4 (19.f3 Nc4–/+) 19...Nc4 20.Be1? (20.Rab1 Na3 21.Rbc1 Qd6–+) 20...Nd6 (20...Ne4 21.Ne4 Ba1 22.Nc5 Ra2 23.Nfe6 fe6 24.Ne6–+) 21.h5 Nfe4 22.Ne4 Ba1 23.Nd6 Qd6 24.hg6 hg6 25.Qg4 Bg7 26.Nh3 Qe7 27.Ng5 f5 28.Qh4 Rf6 29.Qh7 Kf8 30.Bc3 e5 31.f4 d4 32.ed4 ed4 33.Ba1?? Ke8 34.Qg8 Rf8 35.Qd5–/+ Rd8?? 36.Qc6+/– Rd7 37.Qc8 Rd8= 38.Qc6 Rd7 39.Qc8 Rd8= 40.Qc6 ½–½. sunnyda – abaol, kurnik, 2012.

4.Bd2 Ra8 5.Nf3 Nc6 6.g3 Nf6 7.Nc3 (7.Bg2 Bb7=) 7...Bb7 8.Bg2 e6 9.0–0 Be7 10.Nb5 0–0 11.c4 Ba6 (11...d6 12.Qc2+=) 12.Bf4= Nh5? (better is 12...d6=) 13.Bc7+– Qe8? (better is 13...Qc8 14.Bb6 Qb7+–) 14.Nd6 Bd6 15.Bd6 Ne7 16.Qb3 Bb7 17.Qb4 Nc6 18.Qb6 Ba6 19.Ne5 Nf6 20.Nc6 dc6 21.Bf8 Qf8 22.Bc6 Qb8 23.Rab1 Qb6 24.Rb6 Ra7 25.Rb8 (25.Rb8 Bc8 26.Rc8 Ne8 27.Re8) 1–0. usingprogram (1930) – caracola, kurnik, 2011.

3.d3 e5

4.a3 d5 5.Nd2 c5 (5...Nf6 6.e4=+) 6.Bb2 (6.e4 Be6=) 6...Nc6=+ 7.h3 (7.Ngf3 Bd6=+) 7...Nf6 8.g4 e4 (8...d4 9.Ngf3–/+) 9.Nb3 (9.g5 Nd7 10.de4=) 9...d4 (better 9...Ra4!?=+) 10.Na5+– Qa5 11.Qd2 e3 (better 11...Qb6!? 12.c3 Be6+=) 12.fe3+– Bd6? (12...Qc7 13.ed4 Qg3 14.Kd1 cd4 15.Nf3+–) 13.ed4 (better 13.Qa5 Na5 14.ed4 cd4 15.Bd4+–) 13...Bg3 (13...Qb6 14.c3 Bg3 15.Kd1 cd4 16.cd4+–) 14.Kd1 Qd2 (14...Qb6 15.Qe3 Be6 16.Rb1+–) 15.Kd2 cd4 16.Bg2 Bf2 17.Nf3 (17.Bc6 bc6 18.Nf3 Be3 19.Kd1 c5+–) 17...Be3 18.Kd1 Nd5? (18...Be6 19.c4+–) 19.Nd2 (19.Nd4 Nd4 20.Bd5 h5+–) 19...Nc3? (better 19...Be6+–) 20.Bc3 dc3 21.Nc4 Nd4 (21...Bc5+–) 22.Ne3 Kd7 (22...h5 23.Rb1+–) 23.Rf1 (23.Nd5 h5+–) 23...f6 24.Rf4 Ne6 25.Rb4 (25.Rc4 h5+–) 25...Kc7 (25...h5 26.Nd5+–) 26.Nd5 Kd6 27.Nb6 (better 27.Rb6 Kd7+–) 27...Nf4 (27...Rd8 28.e3+–) 28.Bf3 (better 28.Nc8 Rc8 29.Rf4 Rb8+–) 28...Nh3 29.Nc8 Rc8 30.Bb7 (30.Rb7 Rc7 31.Rc7 Kc7+–) 30...Rc7 31.Rab1 Nf2 (31...Ng5 32.a4 Ne6 33.a5+–) 32.Ke1 Ng4 (32...Nh3 33.a4 Ng5 34.a5+–) 33.Rg4 h5 (33...g6 34.Rb6 Ke7 35.Re4 Kf7 36.d4+–) 34.Rd4 (34.Rb6 Ke5 35.Rh4 Kf5 36.Rh5 Kg6+–) 34...Ke5 (34...Ke7 35.Bf3 g6 36.Rb6+–) 35.Rb5 Ke6 36.Be4 Ra7 37.Rb6 (better 37.a4+–) 37...Ke5 (37...Ke7 38.Rc4 h4+–) 38.Rd5 (38.e3 Ra5 39.Rd7 Ra3 40.Rd5) 38...Kf4 39.Rf5 (39.Kf2 Ra5 40.e3 Kg4 41.Bf3 Kh4 42.Rb4 Kh3 43.Bg2 Kh2 44.Rh4) 39...Kg3+– 40.Rh5 Ra3 41.Rb1 (41.e3 Ra2 42.d4 Rb2 43.Rb2 cb2+–) 41...Ra2 42.Rh7 (better 42.Rf5 Rb2 43.Rb2 cb2+–) 42...Rb2 (42...g5 43.Rc7+–) 43.Rb2 cb2 44.Rg7 Kf4 45.Rb7 f5 46.Bf5! Kf5 47.Rb2 Ke5 48.Rb4 Kd5 49.Rc4 Ke5 50.e3 Kd5 51.Rd4 Ke5 52.c3 (52.c4 Kf6 53.c5 Kg7 54.c6 Kg6 55.c7 Kf5 56.c8Q Kf6 57.Rd6 Kg5 58.Qg8 Kh5 59.Rg6 Kh4 60.Qh7) 52...Kf5 53.c4 Ke5 (53...Kg6 54.c5 Kh7 55.c6 Kg7 56.c7 Kf7 57.c8Q Kf6 58.Rd6 Kg5 59.Qg8 Kh5 60.Rg6 Kh4 61.Qh7) 1–0. adabriwala (1605) – SALTYM (1870), lichess.org, 2019.

4.Bd2 Ra8 5.Nc3 d5 6.e4 d4 7.Nd5 c6 8.Nc3? (better is 8.Nb4–/+) 8...dc3–+ 9.Bc3 Bc5 (9...Be6 10.Nf3–+) 10.Be5 Qa5 11.Ke2 f6 12.Bb8 Rb8 13.Nf3 Nh6 14.e5 (14.d4 Bb4 15.c4–+) 14...fe5 15.Ne5 (15.Qd2 Qa7 16.Qg5 0–0–+) 15...Bd4 (15...Qc3 16.f4 Bd4 17.Rb1 Be5 18.Qd2 Bg4 19.Ke1–+) 16.Nc4 Qc5 17.Qe1 (17.c3 Bc3 18.Rc1 Qe7 19.Ne3 Bg4 20.f3–+) 17...0–0 18.Kd1 Ba1 19.Be2 (19.f3 b5 20.Qg3 Ra8–+) 19...Ra8 20.Qd2 (20.a3 Rf2 21.Bf3 Bf5–+) 20...Ra2 21.Bh5 (21.Bf3–+) 21...Rf2 22.Qg5 Qg5 (23.Rf1 Rf1 24.Ke2 Qg2 25.Ke3 Nf5) 0–1. oracleinshadows (1725) – pcmvr (2110), net–chess.com, 2006.

4.Bd2 Ra8 5.e4 Bc5 6.Nf3 Nf6 (6...d6 7.Be2=+) 7.Ne5= d5 8.Be2 (8.ed5!? Qd5 9.Nf3=) 8...de4=+ 9.Bg5?? (better is 9.Bc3=+) 9...Qd4–+ 10.Bf6 Qf2 (10...Qa1?! 11.Bg7 Rg8 12.Bf6 Rg2 13.de4–+) 11.Kd2 Be3 (11...Qf6 12.c3 Qe5 13.Ke1 ed3 14.Qd3–+; < 11...gf6 12.Nc4 ed3 13.cd3–+) 12.Kc3 Bd4 13.Kb3 Ba1 14.Na3 (14.Nc4 Qf6 15.Rf1–+) 14...Qb6 15.Kc4 (15.Nb5 Qb5) 15…Be6 0–1. sburritt – pcmvr (2110), net–chess.com, 2006.

4.Nd2 Bb4 5.a3 Bc3 6.Rb1 d5 7.Bb2 (7.e3 Ra7=+) 7...d4 (better 7...Bb2!? 8.Rb2 Ra3–/+) 8.Bc3= dc3 9.Nb3 (9.Nc4!? Rc5 10.e3=) 9...Ra3=+ 10.Ra1 (10.e3 Qd6=+) 10...Qe7 11.Ra3 Qa3 12.Nf3 (12.d4 ed4 13.Nd4 Nf6–/+) 12...Nc6 13.g4 (13.e3!?–/+) 13...Bg4–+ 14.h3 (14.Bg2 Qb2–+) 14...Bf3 15.Bg2 (15.ef3 Nd4 16.Bg2 Nb3 17.cb3–+) 15...Bg2 16.Rg1 Bd5 (better 16...Bh3 17.Rg7 Nb4 18.f4–+) 17.Rg7 (17.Qa1 Qa1 18.Na1–+) 17...Bb3 18.cb3 Qb2 19.Rg4 c2 (19...c2 20.Qc2 Qc2–+) 0–1. adabriwala – alichuopanzade (1730), lichess.org, 2019.

3.d4 d5

4.Qd2 Ra8 5.Nf3 e6 6.Nc3 Nf6 7.Qf4 Bd6 8.Qg5 (8.Ne5 Bd7=+) 8...0–0 9.Nb5 Be7 10.g3? (better is 10.Qg3 c5 11.e3–/+) 10...Ne4 11.Qg4 (11.Qe3 c6 12.Nc3 Bb4–/+) 11...c6 12.Nd2 cb5 13.Ne4 de4 (13...f5 14.Qh5 fe4 15.f3–+) 14.Qe4 Ra4 (14...Bb4 15.Bd2 Bd2 16.Kd2–+) 15.Bb2 (15.e3 Bb4 16.Bd2 Bd2 17.Kd2 Qa5 18.Kd1 Nd7–+) 15...Nc6 16.Bg2 (16.e3 Qa5 17.c3 b4–+) 16...e5 (better is 16...Qa5 17.Kd1 Rd8–+) 17.d5 (17.0–0–+) 17...Re4 18.Be4 Nd4 (18...Qa5 19.c3 Ba3 20.dc6 Bb2 21.0–0 Ba1 22.Ra1 Qc3 23.Rd1 bc6 24.e3–+) 19.c3 (19.Bd4 ed4 20.0–0 Re8–+) 19...f5 20.cd4 fe4 21.0–0 Qd5 (22.de5 Qd2–+) 0–1. ajeffries (1645) – tomy (2260), net–chess.com, 2006.

4.Bd2 Ra8 5.Nc3 c6 6.Nf3 Bg4 (6...Nf6 7.e3=) 7.Ne5 (7.Rb1 Ra7+=) 7...Bf5 8.e3 Nf6 9.h3 (9.Rb1 Qc7+=) 9...e6 (9...Nbd7!?=+) 10.g4+= Bg6 (10...Be4 11.f3 (worse 11.Ne4 Ne4 12.Bd3 Nd7=+) 11...Bg6 12.h4+=) 11.h4+– h5 (11...Ne4 12.h5 Nc3+–) 12.g5 Nfd7 13.Ng6 fg6 14.e4 (14.Rb1 Nb6+–) 14...Be7 (14...Qb6 15.Ne2 de4 16.Bg2+–) 15.Qf3 (15.Bd3 Qb6 16.ed5 cd5+–) 15...Qb6 (15...e5 16.ed5 ed4+=) 16.Bh3 (better 16.ed5 cd5 17.Qd3+–) 16...Qd4= 17.Be6 Rf8 18.Qh3?? (better 18.Qe3 Qe3 19.fe3 de4 20.Ne4=+) 18...Qf2–+ (18...Rf2 19.Be3 Qc3 20.Kf2 Qc2 21.Kf1 Qc4 22.Kf2 Qe4 23.Rhe1–+) 19.Kd1 Qf3?? (better 19...Rf3 20.Bd7 Nd7–+) 20.Qf3= Rf3 21.Ke2 (21.ed5 Nc5 22.Ke2 Rg3=) 21...de4= 22.Ne4 Ne5 23.Bc3 Ra3 24.Be5 Rfe3 25.Kd2 Re4 26.Rhe1 (26.Rae1 Re1 27.Re1 Nd7 28.Bg7 Ra4=) 26...Rh4=+ 27.Bb8 Bb4 28.Kc1?? (better 28.c3 Bc3 29.Kc2 Ba1 30.Bb3 Kd7 31.Ra1=+) 28...Be1–+ 29.Kb2 Re3 30.Bc8 (30.Re1 Re1 31.Bg3 Rb4 32.Kc3 Re6 33.Kb4–+) 30…Bc3 (30...Bc3 31.Kb3 Ba1 32.c3 Rc3) 0–1. imreallylousy – tche, net–chess.com, 2019.

4.Bd2 Ra8 5.Nc3 e6 6.e3= c5 7.Bb5 Bd7 8.Bd7 Nd7 9.dc5 Bc5 10.Nge2 Ngf6 11.0–0 0–0 12.Nf4 d4 (12...Qc7 13.a4–/+) 13.ed4=+ Bd4 14.Rb1 b6 (15.Nfe2 Be5=+). ajeffries (1645) – nay (2190), net–chess.com, 2006.

4.Bd2 Ra8 5.Nc3 Nf6 6.Nf3=+.

4.Bd2 Ra8 5.Nf3 Bf5 6.Nc3 h6 7.Rb1 Nf6 8.Rb7 Qc8 9.Qb1 e6 10.g4 (10.Bf4!? Na6 11.e3+–) 10...Bg4 11.Ne5 Bf5? (better is 11...Nbd7=) 12.Nb5+– Na6? (better is 12...Bd6 13.Nf7! 0–0 14.Nbd6 cd6 15.Nd6 Qc6 16.Nf5 ef5+–) 13.Na7 Qd8 14.e4! Ne4 15.Qb5 Ke7 16.Nac6 Kf6 17.Nd8 Rd8 18.Qa6 Nd2 19.Kd2 Bd6 20.Qc6 Ra8 21.Rc7 Bc7 22.Qc7 Rhf8 23.Nd7 Kg6 24.Nf8 Rf8 25.Qe7 Ra8 26.Rg1 Kh7 27.Qf7 Rg8 28.Bd3 Bd3 29.Kd3 (29.Kd3 Kh8 30.Qg6 e5 31.de5 d4 32.a4 Re8 33.Qg7) 1–0. pierred (2765) – grahamtrue (2125), net–chess.com, 2011.

3.d4 Nf6

4.Nc3 Nc6 5.Bb2 g6 6.e4 d5 7.e5 Ne4 8.Ne4 de4 9.Bc4 Bh6 10.h3 0–0 11.Ne2 e3 12.f3 b5 13.Bb3 Ra6 14.f4 Bb7 15.Qd3 Nb4 16.Qe3 Bg2 17.Rh2 Bb7 18.Nc3 Qd7 19.Qf2 Rd8 20.Rd1 Nd5 21.Nd5 Bd5 22.Bd5 Qd5 23.a3 Qe4 24.Kf1 Bf4 25.Rg2 Qe5! 26.de5 Rd1 27.Qe1 Re1 28.Ke1 Kg7 29.Ke2 Re6 30.Kd3 Be5 31.Be5 Re5 32.Rg3 Rd5 33.Ke4 Rc5 34.c3 Rc4 35.Kd5 c6 36.Ke5 Ra4 37.h4 Rh4 38.Rd3 Ra4 39.Rd7 f6 40.Ke6 Re4 0–1. grahamtrue (2125) – pierred (2765), net–chess.com, 2011.

4.e3 d5 5.Bd2 Ra7 6.Nc3 Bf5 7.Be2 e6 8.Bb5 c6=+ 9.Ba4 Ne4–/+ 10.Ne4? Be4–+ 11.Bb3?? Bg2 12.Nf3 Bh1 13.Ne5 Qh4 14.Ke2 Qh5 15.Nf3 Bf3 16.Ke1 Bd1 17.c3 Qe2 0–1. ajeffries (1645) – pcmvr (2110), net–chess.com, 2006.

4.e3 e6 5.Nf3 c5 6.Bd2 Ra8 7.Bb5 Be7 (8.0–0 0–0+=). oasis – C_D_B7 (1615), chessHere.com, 2006.

4.Nf3 d5 5.e3 e6 6.Bd2 Ra8 0–1. Reichardt – Tejler,Anders, corr SOK–89–33, 1989.

3.d4 g6

4.Bd2 Ra7 5.e4 Bg7 6.Nc3 Nf6 7.e5+= Nh5? 8.g4+– Nc6 9.gh5 Nd4 10.Be3 Nf5? 11.Ba7 Be5 12.Qd3 b6 13.Nf3 Bb7 14.Ne5 Bh1 15.Bh3 Qa8 16.Qd7 Kf8 17.Bf5 gf5 18.0–0–0 Bf3 19.Nf3 Rg8 20.h6 Qe8 21.Qc7 (21...f6 22.Rd8+–) 1–0. smoothmovermovesagain – PeterRs, ChessWorld.net, 2006.

4.e4 d5 5.Bd2 Ra8 =.

4.Bf4 Bg7 5.e3 (5.e4 Nc6 6.Nf3 d5=) 5...Nf6 6.Nd2 (6.Nf3 d6=) 6...d6 7.Ngf3 0–0 (7...Nd5 8.Nb3 Ra7 9.Bg5=) 8.c4 b6 9.Be2 c5 10.0–0 Nh5 11.Rb1 Nf4–/+ 12.ef4 Bf5 13.Rb5 Ra2 14.Qb3 Ra6 15.Qe3 Nc6 16.dc5 bc5 17.Qb3 Nb4 18.Nh4 Bd7 19.Rb4 cb4 20.Qb4 Qb6 21.Qb6 Rb6 22.Ne4 f5 23.Ng3 Rfb8 24.h3 Rb1 25.Bd3 Rf1 26.Bf1 Rb1 27.Nf3 Be6 28.Kh2 Rc1 29.h4 Bc4 30.Bc4 Rc4 31.Ne2 Re4 32.Nfg1 e5 33.f3 Rc4 34.Nh3 ef4 35.Nef4 Be5 36.g3 Rc2 37.Ng2 h6 38.f4 Bf6 39.Ng1 d5 40.Kh3 Rc1 41.Kh2 d4 42.Nf3 d3 43.Ne3 Rc2! 44.Kh3 Rf2 45.Ne1 Re2 46.N1g2 d2 47.Nd1 Re1! 48.Nge3 Bd4 (49.Kg2 Be3–+) 0–1. Mathofer,Kurt – Arendt,Heinz (1935), Ruhr–ch Seniors 4th, 1997.

3.e3 Ra8

4.Bb2 Nc6 5.Nf3 d6 6.Be2 e5 7.0–0 f5 8.Nc3 Nf6 9.d4 e4 10.Nd2 Be7 11.f3 (11.d5 Ne5=) 11...d5=+ 12.fe4 fe4 13.Nb3 Be6 14.Bb5 0–0 15.Rf2 (15.Bc6 bc6 16.Qd2 Bd6–/+) 15...Na7 16.Be2 c6 17.Nc5 Nc8?? (better 17...Bc8–/+) 18.Ne6+– Qd6 (18...Qb6 19.Rb1 Rf7+–) 19.Nf8 Bf8 20.a4 Ne7 21.Ba3 Ng6 (21...Qc7+–) 22.Bd6 Bd6 23.Rf6! gf6 24.Bh5 (24.Qb1 Rb8+–) 24...Kg7 (24...Bb4 25.Na2 Bf8 26.Qb1+–) 25.Bg6 (25.Qg4 f5 26.Qf5 Bb4 27.Bg6 hg6 28.Qd7 Kh6 29.Qb7 Bc3 30.Qa8 Bd2 31.Qh8 Kg5 32.h4 Kg4 33.Qh6 Be3 34.Qe3 Kf5 35.Qh3 Kf6 36.Qd7 g5 37.Rf1 Kg6 38.Qf7 Kh6 39.Rf6) 25...hg6 26.Qg4 (26.Qb1!? Rb8 27.Qb6 Kh6+–) 26...f5 27.Qg5 Rf8 Black plans f4 (27...b5 28.g4 f4 29.ef4+–) 28.g4 (28.h4 Kf7+–) 28...f4 (28...Rf7 29.gf5 Rf5 30.Qd8+–) 29.Rf1 (29.Nd5 cd5 30.Qd5 Bc7+–) 29...f3 (29...Rf7 30.Nd5! cd5 31.Qd5+–) 30.Ne2! Rf7 (30...fe2 31.Re1 Decoy) 31.Ng3 (31.Nf4 Bf4 32.ef4 Kh7+–) 31...Bg3 (31...Be7 32.Nf5 Rf5 33.Qe7 (33.gf5?! Bg5 34.Kf2 Bh4 35.Kg1 gf5=) 33...Rf7 34.Qe5 Kh7 35.c4 dc4 36.Qe4+–) 32.hg3 Rf6 33.Rf2 Rf7 34.Qe5 Rf6 (34...Kh7 35.Rh2 Kg8 36.Rh8) 35.Qe7 (35.g5 Kf8 36.gf6 Kf7 37.Qe7 Kg8 38.Qg7) 35...Rf7+– 36.Qe5 Rf6 37.Qb8 (37.g5 Kf8 38.gf6 Kf7 39.Qe7 Kg8 40.Qg7) 37...Rf7 38.g5 (38.Rh2 f2 39.Kf1 Rf8 40.Qe5 Rf6 41.g5 Kf7 42.Qf6 Ke8 43.Rh7 c5 44.Qe7) 38...Re7 (38...Rf8 39.Qe5 Kh7 40.Rh2 Kg8 41.Rh8 Kf7 42.Rh7 Kg8 43.Qg7) 39.Qe5! Re5 40.de5 Kf7 41.Rh2 Ke6 42.Rh6 (42.Rh7 b6 43.Rg7 Kf5+–) 42...Ke5 (42...Kf5 43.e6! Ke6 44.Rg6 Kf5 45.Rc6 Kg5 46.Rd6+–) 43.Rg6 Kf5 44.Rg8 (44.Rc6 Kg5 45.Rd6 Kg4+–) 44...d4 (44...Kg4 45.Rb8 Kg5 46.Rb7+–) 45.g6 (45.Rf8 Kg6 46.ed4 Kh5+–) 45...de3 46.g7 e2 (46...Kf6+–) 47.Rf8 Ke5 48.Re8 (48.Kf2 e1R 49.Ke1 b5+–) 48...Kd4 (48...Kf6 49.Re4 Kg7+–) 49.Re4! Ke4 50.g8Q 1–0. anotherheaven (1645) – andre032 (1680), lichess.org, 2015.

4.Bc4 d5!? 5.Bb5 c6 =+.

4.Bc4 e6 5.Bb2 d5 6.Bb3 (6.Bd3 Nd7=+) 6...Nf6 7.c4 (7.Nf3 Bd6=+) 7...c6 (7...dc4 8.Bc4 Nc6 9.Nf3=+) 8.cd5= cd5 9.Nf3 Bd7 10.0–0 Nc6 (10...Bd6 11.Nc3=) 11.d4 (11.d3 Bc5=) 11...Bd6 12.Nbd2 (12.Nc3 Qa5=+) 12...0–0 (12...Qc7 13.Qe2=+) 13.Re1 (13.Ne5 Qc7 14.f4 Rfc8=+) 13...Qe7 (13...Qb8!?=+) 14.e4= de4 15.Ne4 Ba3 16.Nf6 Qf6 17.Bc3 (17.Ba3 Ra3 18.d5 ed5 19.Qd5 Bg4=) 17...Bb4 (better is 17...Rfd8=+) 18.Bb2 (better is 18.Bb4 Nb4 19.Qd2=) 18...Be1–+ 19.Qe1 Rfe8 (19...Na5 20.Bc2 Bc6 21.Ne5–+) 20.Rb1 Qf4 21.d5 ed5 22.Qc3 d4 23.Qc4? Be6 24.Qb5 Bb3 25.Qb3 Na5 26.Qb5 Qc7 27.Bd4 Nc4 28.Qg5 f5 29.Nh4 Ra6 30.Nf5 Qf7 31.Bg7+= Rg6 32.Nh6+/– Kg7 33.Nf7 Rg5 34.Ng5 Re2 35.a4 b6 36.g3 Kg6 37.Nf3 h5? 38.Nd4 Rb2 39.Rb2 Nb2+/– 40.Nb5 Na4 41.Kg2 Kf5 42.f4 Ke4 43.h3 Kd5 44.g4+– hg4 45.hg4 Ke4 46.Kg3 Nc5 47.f5 Nd3? 48.Kh4 Ne5? 49.Kg5 Nf3 50.Kg6 Ne5 51.Kg7?? Ng4= 52.Nd6 Kd5 53.Nf7 b5=+ 54.Nh6 Ne5 55.f6+= b4 56.f7?? Nf7–+ (57.Ng4 b3–+) 0–1. revbodio – biffum, Live Game Caissa's Web, 2005.

4.Nf3 Nf6 =.

4.Nf3 g6 5.Be2 Bg7 6.c3 e6 7.0–0 Ne7 8.Bb2 0–0 9.Qc2 d5 10.c4 c6 11.Bg7 Kg7 12.d4 Bd7 13.Qb3 b6 14.Nbd2 c5 15.Rfb1 Ba4 16.Qb6 Qb6 17.Rb6 cd4 18.Nd4 dc4 19.Nc4 Nd7 20.Rb7 Nd5 21.Nb2 Nc5 22.Rb5 Bb5 23.Nb5 Rfb8 24.Nd1 Ra5 25.Nd4 Rba8 26.Bc4 Nb4 27.Nc3 Ncd3 28.Bb3 Nc5 29.Bc4 Ncd3 30.Bb3 Nb2 31.Kf1 h5 32.Ke2 e5 33.Nf3 f6 34.Nd2 Rc5 35.Nce4 Rc7 36.Nd6 Na4 37.Nb5 Rd7 38.Nc4 Nc5 39.Bc2 Nc2 40.Rc1 Nb4 41.a3 Nd5 42.Nb6 Nb6 43.Rc5 Ra3 44.h3 Rb3 45.Nc7 Nc8 46.Ne6 Kf7 47.Nc7 Ke7 48.Nd5 Ke6 49.Nf4 Kf5 0–1. exp2005 – m3011, kurnik, 2012.

3.e3 d5

4.Bb2 Nc6 5.Nc3 e5=+ 6.Nge2 d4 7.ed4 ed4 8.Ne4 Bf5 9.N4g3 Bg6 (9...Be6=+) 10.d3 (better 10.Nf4!?=+) 10...Bb4–/+ 11.c3 dc3 12.Bc3 (12.Nc3 Nf6 13.Qd2 Re5 14.Be2 Nd4–/+) 12...Bc3 (12...Qe7 13.Rc1–+) 13.Nc3–/+ Re5 14.Nge4? (better 14.Be2–/+) 14...Be4?? (better 14...f5 15.f3 Nf6–+) 15.de4= Re4?? (better 15...Nf6 16.Qd8 Kd8 17.0–0–0 Kc8=) 16.Ne4+– Qd1 (16...Qe7 17.Qe2+–) 17.Rd1 Nge7 18.Bb5 0–0 19.0–0 (19.Rd7 Rc8+–) 19...Nb4 (19...Nb8 20.a4+–) 20.a4 (better 20.Rd7!? c6 21.Re7 cb5+–) 20...c6 21.Bc4 b5 (21...Nbd5 22.a5 b5 23.Bd5 Nd5 24.Rc1+–) 22.ab5 cb5 23.Bb5 Rb8 (23...Nbd5 24.Rfe1+–) 24.Ba4 (24.Rd7!? Ng6 25.Nd6 Ne5+–) 24...Nbd5 25.Rb1 Ra8 26.Bc6 (26.Rb7 Kf8+–) 26...Rf8?? (26...Nc6 27.Rfd1 Nce7+–) 27.Bd5 Nd5 28.Rfd1 Nc3 (28...Nf6 29.Nf6 gf6+–) 29.Nc3 (29.Nc3 g6 30.Rd7+–) 1–0. aravind555 – NaserRr, lichess.org, 2019.

4.Ne2 d4 (better 4...Nd7!?=+) 5.Nd4+= g6 (5...e5 6.Nb3 Ra8 7.Bb2+–) 6.Nf3 Bg7 7.c3 (7.d4 Nf6+–) 7...Bg4 8.Be2 Qd5 (8...e5 9.Qb3 e4 10.Qb4+=) 9.0–0 (9.d4 Nf6+–) 9...h5 (9...Ra2!? 10.Ra2 Qa2+–) 10.d4+– h4 (10...Nf6 11.Nbd2 Nbd7 12.c4+–) 11.c4 Qd6 12.Bd2 Nf6?? (better 12...Ra8+–) 13.Ba5 b6 14.c5 Qd5 (14...bc5 15.Na3 0–0 16.Nb5+–) 15.Nc3 Qf5 (15...Qa8 16.Bb4+–) 16.Bd3 (16.Bd3 Bf3 17.Bf5 Bd1 18.cb6 (18.Nd1?! ba5 19.Bd3 h3+–; worse 18.Rad1 ba5 19.Rb1 Nc6+–) 18...cb6 19.Bb6+– (19.Nd1?! ba5 20.Rb1 Nbd7 21.Bd7 Kd7+–; worse 19.Rfd1 ba5 20.Rab1 0–0+–; worse 19.Rad1 ba5 20.Rb1 0–0+–); better 16.Qa4 Nfd7 17.cb6 cb6 18.Bb6+–) 1–0. aravind555 – Computerengineer99, lichess.org, 2019.

3.e3 e5

4.Bb2 Nc6 5.Nf3 Nf6 6.d4 e4 7.Nfd2 (7.Ne5 Bb4 8.Nd2 0–0=) 7...d5 8.c4 dc4 9.Bc4 b5 (9...Bb4 10.Qc2=) 10.Be2 Be7 (10...Bb4 11.Bc3+=) 11.a3 (11.Nb3 Ra6 12.Bb5 Rb6+/–) 11...Be6 12.Bc3 (12.Qc2 Qd7+=) 12...Ra8 (better is 12...b4!? 13.ab4 A) 13...Bb4? 14.Ra5 Bc3 15.Rc5 (15.Nc3?! Na5 16.Qa4 c6+–) 15...Bd2 16.Nd2+–; B) 13...Ra1 14.Ba1 Nb4=) 13.Bb5+/– Bd5 14.Qc2 0–0 15.a4 (15.Bb2 Na7 16.Be2 Rc8+/–) 15...Na5 (15...Qd6 16.a5+=) 16.Na3 c6 17.Ba5 (17.Be2 Qc7+/–) 17...Ra5 (better is 17...Qa5 18.Bc4 Qa4 19.Qa4 Ra4 20.Bd5 cd5+=) 18.Bc6+/– Ba3 (better is 18...Bc6 19.Qc6 Qa8 20.Qa8 Rfa8+/– (20...Raa8? 21.Nac4+–)) 19.Ra3 (19.Bd5 Nd5 20.Ra3+–) 19...Qd6?? (better is 19...Qc7 20.Rc3 Rc8+=) 20.Rc3+– Rc8 21.Bd5 Rb8 22.Rc8 Rc8 23.Qc8 Qf8 24.Qf8 Kf8 25.Be4 Ra4 26.Ke2 g6 27.Rd1 Ng4 28.h3 Nh6 29.g4 f5 30.gf5 gf5 31.Bc6 Ra2 32.Kf3 Ke7 33.d5 Kd6 34.Nc4 Kc5 35.Rd4 Nf7 36.Be8 Ng5 37.Kg3 Ne4 38.Kf4 Rf2 39.Ke5 White prepares the advance d6 39...Rf3 40.Bh5 Rh3 41.Kf5 Ng3 42.Kg4 Rh5 43.d6 Rh4 44.Kg3 Rd4 45.ed4 Kc4 46.d7 1–0. Fournier,Frederic – Cadet,Yves, Ch Club, 1994.

4.Bb2 d6 5.g3 h5 (5...Nc6 6.Nc3=+) 6.Qf3 (6.f4 ef4 7.ef4 Qe7 8.Qe2 Nc6=+) 6...Nc6=+ 7.Bc4 (7.Bc3 Ra7=+) 7...Nf6 8.h3 Nb4 (8...d5 9.Bb3–/+) 9.Bb3=+ Be6 10.Na3? (10.Qd1!?–/+) 10...Bb3 (better 10...Ra3!? 11.Ba3 Bb3 12.cb3 Nc2 13.Kd1–+) 11.ab3 b6 (better 11...Ra3!? 12.Ra3 Nc2 13.Kd1 Na3 14.Qb7 Nb1–/+) 12.Qd1 Qa8 (12...Be7 13.Nf3=+) 13.f3 (13.Nf3 Be7=) 13...Nfd5 (13...Qc6 14.Kf2=+) 14.e4 Nf6 15.Ne2 Nd7 (15...d5 16.ed5 h4 17.g4=+ (17.Be5? Ra3 18.Ra3 Qa3–+)) 16.Nb5 Kd8 17.0–0 c6 (17...d5 18.ed5 Ra1 19.Ba1 Qd5 20.Nbc3=) 18.Nbc3 Be7 19.f4 Rf8 20.f5 (20.Ra4 d5+=) 20...Bf6 (20...Ra1 21.Ba1 d5 22.ed5 cd5 23.d4=+) 21.Ra5 Qa5 22.Nc1 Rh8 23.Nd3 (23.Kg2 d5=) 23...Nd3=+ 24.cd3 Qa7 (24...d5 25.Qc1–/+) 25.Kh2 Nc5 (25...b5 26.Qf3=+) 26.Qc2= Nd7 (26...Qb7 27.Rc1=) 27.Ra1 (27.Ne2 Qc7=) 27...Qb7 28.Ba3 Ke7 29.b4 (29.Bb4 h4=) 29...Ra8 (29...b5 30.Bb2=) 30.Qb3 (30.b5 Ke8=) 30...Bg5 (30...b5 31.Qc2=+) 31.Qa2 (31.b5 Bd2 32.bc6 Qc6 33.Nd5 Ke8=+) 31...h4 (31...b5 32.h4 Bh6 33.Kg2–/+) 32.Ne2 (32.gh4!? Bf4 33.Kg2=+) 32...hg3–/+ 33.Kg3 Nf6 34.h4 (34.b5 c5–/+) 34...Bh6 35.Kf3 (35.b5 c5–/+) 35...Nd7 (35...Kd8 36.b5 c5 37.Nc3–/+) 36.d4 (better 36.b5!? c5 37.Nc3–/+) 36...ed4–+ 37.Nd4 Ne5 38.Ke2 (38.Kg3 c5 39.f6 Kf6–+) 38...c5 39.f6 (39.d3 cd4 40.b5 Ra5–+) 39...Kf8 (39...Kf6!? 40.Qb1 cd4 41.Bb2 Ra1 42.Ba1–+) 40.fg7 Bg7 41.bc5 (41.Qc2 cd4 42.d3–+) 41...Qe4 42.Kd1 dc5 (better 42...Qd4 43.c6 Kg8–+) 43.Bc5!+– bc5 44.Qa8 Theme: Double Attack 44...Qa8 45.Ra8 Ke7 46.Nf5 (46.Ra7 Kf8 47.Nf5 Kg8+–) 46...Kf6 47.Ng7 Kg7 48.Rc8 (48.Ra5 Nd7+–) 48...c4 49.Ke2 Kf6 50.Rg8 Ng6 51.Ke3 (51.h5 Nf4 52.Ke3 Nh5+–) 51...Nh4 52.Ke4 Ng6 (52...Ke6 53.Re8 Kd6 54.Rd8 Ke6 55.Kd4+–) 53.Rc8 Ne5 54.Rc5 Ng4 (54...Nd7 55.Rc4 Kg5 56.Rc7 f5 57.Kd5+–) 55.Rc4 Nf2 56.Ke3 Nd1 (56...Nh3+–) 57.Ke4 (better 57.Ke2+–) 57...Nf2 58.Kf3 Nd3 59.Ke3 Ne5 60.Rf4 Ke6 61.Ke4 Ng6 (61...Nc4 62.Rf2+–) 62.Rf5 f6 (62...Ne7 63.Re5 Kd6 64.Ra5+–) 63.d4 Nh4 (63...Kf7+–) 64.d5 Kf7 65.Rh5 Ng6 66.Rh7 Kg8 (66...Ke8 67.Kf5 Ne7 68.Ke6+–) 67.Ra7 Kf8 (67...Ne5 68.Kf5 Nc4 69.Kf6+–) 68.d6 (68.Kf5 Ne7 69.Ke6 Nd5 70.Kd5 f5 71.Ke6 f4 72.Rf7 Kg8 73.Rf4 Kg7 74.Rg4 Kh6 75.Kf6 Kh7 76.Rh4 Kg8 77.Rh5 Kf8 78.Rh8) 68...Ke8 69.Kf5 Nf8 70.Kf6 Nd7 71.Ke6 Nf8 72.Kd5 Nd7 73.Kc6 Ne5 74.Kc7 Kf7 75.d7 Nd7 76.Kd7 Kf6 (76...Kg6 77.Ke6 Kg5 78.Ra4 Kg6 79.Ra5 Kg7 80.Rg5 Kh6 81.Kf6 Kh7 82.Rh5 Kg8 83.Rh6 Kf8 84.Rh8) 77.Ra5 Kf7 78.Rf5 Kg6 79.Ke6 Kg7 80.Rf7 (80.Rg5 Kh6 81.Kf6 Kh7 82.Rh5 Kg8 83.Rh4 Kf8 84.Rh8) 80...Kg6 81.Rf1 (81.Rf4 Kg5 82.Rd4 Kg6 83.Rg4 Kh5 84.Kf5 Kh6 85.Kf6 Kh7 86.Rh4 Kg8 87.Rh5 Kf8 88.Rh8) 81...Kg7 (81...Kg5 82.Rf5 Kh4 83.Ke5 Kg3 84.Rf4 Kh3 85.Ke4 Kg2 86.Rf3 Kh2 87.Kf4 Kg2 88.Ke3 Kg1 89.Rg3 Kh1 90.Kf3 Kh2 91.Kf2 Kh1 92.Rh3) 82.Ke7 (82.Rg1 Kh6 83.Kf5 Kh7 84.Kf6 Kh8 85.Kf7 Kh7 86.Rh1) 82...Kg6+– 83.Rg1 Kf5 84.Re1 Kf4 85.Kf6 Kf3 86.Kf5 Kf2 87.Ra1 (87.Re5 Kg3 88.Re3 Kf2 89.Kf4 Kg2 90.Re2 Kf1 91.Kf3 Kg1 92.Re1 Kh2 93.Rd1 Kh3 94.Rh1) 87...Ke3+– 88.Ra4 Kd3 89.Kf4 Kc3 90.Ke4 Kb3 91.Rd4 Ka3 (91...Kc3 92.Ke3 Kc2 93.Rc4 Kb2 94.Kd2 Kb3 95.Kd3 Kb2 96.Rb4 Ka3 97.Kc3 Ka2 98.Ra4 Kb1 99.Ra5 Kc1 100.Ra1) 92.Kd3 Kb3 93.Rc4 Kb2 94.Rc3 Kb1 95.Rb3 Kc1 (95...Ka1 96.Kc3 Ka2 97.Kc2 Ka1 98.Ra3) 96.Kc3 (96.Rb4 Kd1 97.Rb1) 96...Kd1 97.Rb2 Kc1 (97...Ke1 98.Kd3 Kf1 99.Ke3 Kg1 100.Kf3 Kh1 101.Kg3 Kg1 102.Rb1) 98.Ra2 (98.Rb4 Kd1 99.Re4 Kc1 100.Re1) 98...Kb1 (98...Kd1 99.Rd2 Ke1 100.Kd3 Kf1 101.Ke3 Ke1 102.Rd4 Kf1 103.Rg4 Ke1 104.Rg1) 99.Rh2 (99.Ra3 Kc1 100.Ra1) 99...Ka1 100.Kb3 Kb1 101.Rh1 1–0. Delboy Smith (1705) – jamespond (1660), ChessWorld.net, 2011.

3.e4 d6

4.d4 e5 5.Bd2 (5.Nf3 Nf6 6.Bd2 Ra7 7.Nc3 ed4 8.Nd4 Be7= 0.00; 5.de5 Re5 6.Nc3 Be7 7.Nf3 Rc5 8.Nd5 Nf6= 0.00) 5...Ra8 6.Nf3 ed4 7.Nd4 d5 8.ed5 Qd5 =.

4.d4 Nf6 5.Bd3 (5.Nc3 e5 6.de5 de5 7.Qd8 Kd8 8.Bd2 Nc6= –0.22) 5...e5 6.Bb2 (6.Nf3 Bg4= 7.d5 Be7 8.h3 Bh5= 0.09) 6...ed4+= 7.Bd4 Nc6 8.Bc3 Rg5 9.Qf3 (9.Kf1 Rc5+=) 9...Ne5 10.Be5 de5 11.Nd2 Bc5 12.Nh3 (12.h3 Rh5+=) 12...Rg6 (better is 12...Bg4 13.Ng5 Bf3 14.Ngf3 Qa8–/+) 13.0–0? (better is 13.c3–/+) 13...0–0 14.Kh1 (14.Nf4 ef4 15.e5 Ng4 16.Bg6 Qd2–+) 14...Bd4 15.Rab1 Bg4 16.Qg3 Nh5 17.Qg4 Rg4 18.Be2 Rh4 19.Nf3 Rh3! 20.gh3 Nf4 21.Nd4 Qd4 22.Bg4 Qe4 23.f3 Qc2 24.Rg1 f5 25.Rbc1 Qf2 26.Rcf1 Qa7 27.Bh5 Nh5 28.Ra1 Qe3 29.Rae1 Qf3 30.Rg2 Nf4 31.Reg1 Ng2 32.Rg2 Rd8 33.Kg1 Rd1 0–1. opponent – pierre, internet, 2008.

4.Nf3 c5 5.d4 Nc6 (better is 5...Nf6 6.Bd2 Ra8+=) 6.Na3?? (better is 6.d5 Nb4 7.a3+/–) 6...Ra3!–/+ 7.Ba3 Qa5 8.Qd2 Qa3 9.Bb5 (9.d5 Na7–/+) 9...Qb2 (9...Nf6!? 10.Qd3 Qa5 11.Kf1 cd4 12.Nd4 Bd7–+) 10.Bc6–/+ bc6 11.0–0 Nf6 (11...cd4!? 12.Nd4 c5–/+) 12.Rfb1=+ Qa3 13.dc5? (better is 13.e5 Nd7 14.ed6 cd4 15.de7 Be7 16.Nd4=+) 13...Ne4–+ 14.Qf4 (14.Qe1 Nc5 15.Rb8 Qa6–+) 14...Nc3 15.Re1 Qc5 16.Ng5 f5 17.Ne6 Be6 18.Re6 Ne4 19.Re1 Qd5 20.f3 Qe6 21.fe4 fe4 22.Re4 Qa2 23.Ra4 Qb1 24.Kf2 Qc2 25.Kg3 Qb3 26.Kh4 Qd5 27.Ra8 Kd7 28.Qg4 e6 29.Ra7 Ke8 30.Ra8 Kf7 31.Qf4 Qf5 32.Qf5 ef5 33.g4 fg4 34.Kg4 g6 0–1. Steve20 – PeterRs, ChessWorld.net, 2006.

4.Nf3 Nf6 5.Nc3 =.

4.Nf3 g6 5.d4+= Bg7 (5...Nf6 6.Bd3+=) 6.Bd3 (6.Bd2 Ra7=) 6...c5 (6...Nc6 7.c3=) 7.c3 (7.Nbd2 cd4 8.Nb3 Ra8=) 7...Nf6 (7...cd4 8.cd4 Bg4 9.Be2=+) 8.Qb3 (8.0–0 0–0=) 8...0–0 (8...d5 9.ed5 Nd5 10.0–0=) 9.0–0 cd4 (9...b5 10.Nbd2=) 10.cd4 Nc6 11.Bb2 (11.Be3 d5 12.e5 Ne4=) 11...Nd7 (better is 11...d5!? 12.e5 Nh5=+) 12.Nbd2+= Ra8 (12...Rh5 13.Rfe1+=) 13.Nc4+/– Na5 14.Na5 Ra5 15.Bc3 (15.Rab1 Nf6+/–) 15...Ra8 (15...Rh5+/–) 16.Bc4 (16.Rfb1!?+/–) 16...Nb6= 17.Rab1 (17.Rfc1 Nc4 18.Qc4 Bg4=) 17...Nc4 18.Qc4 b5 19.Qb3 (< 19.Qb5 Ba6 20.Qb3 Bf1 21.Rf1 Qd7–/+) 19...Ba6 (19...d5 20.Qd5 Qd5 21.ed5=) 20.Rfe1 (20.Rfc1 d5 21.Qd5 Qd5 22.ed5 Rfd8+=) 20...Qd7 (20...Qc7 21.Bd2=) 21.e5 de5 22.de5 Rfb8?? 23.Ng5 e6 24.Ne4 Bb7= 25.Qb5 Qb5 26.Rb5+= Be4 27.Rb8 Rb8 28.Re4 Rb1 29.Re1 Re1 30.Be1 Be5 31.Bb4 Bb8 32.a4+/– Ba7 33.a5+– f5 34.Bd2 e5 35.Be3 (35...Bb8 36.a6+–) 1–0. chessotka (1640) – StephenHilton (1615), internet, 2006.

3.e4 e5

4.Bc4 b5 5.Bb3 +=.

4.Bc4 Bc5 5.Qf3 (better is 5.d3=) 5...Nh6 (better is 5...Nf6+=) 6.d4+/– c6?? (6...d5 7.Bd5 c6 8.Bh6 cd5 9.Bg7 de4+/–) 7.Bh6+– d5 8.dc5 dc4 9.Bg7 Rg8 10.Qg3 (10.Qc3 Rg7 11.Qe5 Kf8 12.Qb8 Rg2+–) 10...Rc5 11.Nf3 f5 12.ef5 Bf5 13.Nc3 Bc2? 14.0–0?? Qd7? 15.Ne1 Rg7 16.Qe3 Bf5?? 17.Qc5 (17.Qc5 Qd4 18.Qa3+–) 1–0. Wall,Bill – Merlin84, chess.com, 2008.

4.d4 Bb4 5.c3= Bd6 6.Nf3 Nc6 7.de5 Be7 8.Be2 f6 9.ef6+/– gf6 10.0–0 h5 11.Nh4 Ne5 12.Bh5 Kf8 13.f4 Nc6? 14.Ng6 Kg7 15.Nh8 Kh8 16.Qg4 Ra4 17.Qh3 Bc5 18.Kh1 Re4 19.Bg6 Kg7 20.Qh7 Kf8 21.Qf7# 1–0. CSLewis – sirrad, ChessWorld.net, 2005.

4.Nf3 d6 5.d4= Bd7 (5...Nf6 6.Bd2 Ra8 7.Nc3=) 6.Bd3 (6.Bd2 Ra8+=) 6...Nf6 (6...ed4 7.Nd4 Qf6 8.Be3=) 7.0–0 (7.de5 de5 8.Bd2 Ra8 9.Ne5 Be6+/–) 7...Be7 (7...ed4 8.Nd4 Be7 9.Bd2=) 8.Bd2+= Ra8 (8...Ra4 9.Nc3 Ra5+=) 9.d5 (9.de5!? de5 10.Ne5+/–) 9...0–0 10.Nc3 Bg4 (10...Na6 11.Qe2=) 11.h3 (11.Rb1 b6=) 11...Bh5 12.Be2 (12.Rb1 Qc8=) 12...Nbd7 13.Ng5 (13.Be3 Nc5=) 13...Bg6+= 14.Bd3 h6 (14...Nc5 15.Re1+=) 15.Nf3= Nc5 The pressure on e4 grows 16.Re1 (16.Qe2 c6 17.dc6 bc6=) 16...Nd3 (16...c6 17.dc6 bc6 18.Qe2+=) 17.cd3= Ra6 18.Rb1 b6 (18...Qa8 19.Qb3 Rb8 20.d4=) 19.d4 Re8 (better is 19...Nd7!?=) 20.de5+/– de5 (20...Nd7 21.Bf4+/–) 21.Ne5+– Nh7 (21...Bd6!? 22.Ng6 fg6+/–) 22.Qe2 (22.Ng6 fg6 23.e5 Bc5+–) 22...Bd6 (22...Ra3 23.Ng6 fg6 24.Qc4+–) 23.Nf7! (worse is 23.Qa6 Be5 24.Qa4 Nf6+–) 23...Kf7 (23...Bf7 24.Qa6) 24.Qa6 (24.Qa6 Qh4 25.Nb5+–) 1–0. Kukel,Attila – Prochaczka,S, SVK–ch U12 Slovakia, 2000.

4.Nf3 Nf6 =.

4.f4 ef4 5.Nf3 Nc6 6.Bc4 d6 7.d4=+ Bg4 8.0–0 Be7 9.Bf4 Nf6 10.Nc3 0–0 11.Bb3 Re8= 12.Qd3 Bf8 13.Bg5 Be7= 14.Bd2 Ra8 15.Ng5 h6?? 16.Nf7 (16...Qb8 17.Nh6 Kh8 18.Ng4+–) 1–0. mluka (2220) – rhand (1985), net–chess.com, 2002.

3.e4 Nf6

4.Nc3 Nc6 =.

4.Nc3 e5 5.Bb2 Bc5 6.h3 c6 7.a3?? (better is 7.Qf3–/+) 7...Qb6–+ 8.Rb1 Bf2 9.Ke2 Bg1 10.Qe1 Bd4 11.Kd1 0–0 12.d3 d5 13.Kc1 Be3 14.Kd1 Qc5 15.ed5 cd5 16.Qe2 Nc6 17.Ke1 (17.g4–+) 17...Nd4 18.Qd1 Ra3 19.Ne2 (19.Be2–+) 19...Nf3! 20.gf3 (20.gf3 Bf2 Mate attack) 20...Bf2 21.Kd2 Qe3 0–1. grahamtrue (2125) – pierred (2765), net–chess.com, 2011.

4.Nc3 e5 5.a3 Nc6 6.Nf3 d5 7.ed5 Nd5 8.Nd5 Qd5 9.Be2 e4–/+ 10.Ng1 Bc5 11.d3? Qd4?? 12.Be3–/+ Qc3 13.Bd2 Qf6 14.Be3? Be3–+ 15.fe3 Qc3 16.Kf2 Rf5 17.Nf3 ef3 18.Bf3 Ne5 19.Qe2 Ng4 20.Kg3 Qe5 21.Kh3 Rh5 0–1. losertoo (1860) – pcmvr (2110), net–chess.com, 2006.

4.Nc3 e5 5.Bb2 Bc5 6.Nf3 Ng4 7.d4 ed4 8.Nd4 Qf6 9.Qg4=+ Bd4 10.Qg3 Rc5–/+ 11.Nd5 Rd5!–+ 12.ed5 Bb2 13.Qe3?? Kd8 14.d6 Bc3 15.Kd1 Qd6 16.Bd3 Ba1 17.Re1 Nc6 18.g3 Nb4 19.Re2 Na2 20.Ke1 Bd4 21.Qg5 Qf6 22.Qh5 Nc1 23.Rd2 Re8 24.Kf1 Nd3 25.cd3 Qc6 26.Kg1 Re1 0–1. rodnel – pcmvr (2110), net–chess.com, 2006.

4.Nc3 e5 5.Bc4 Ne4 6.Bf7 Kf7 7.Ne4 d5 8.Ng3 Qf6 9.Bb2 Nc6 10.h3 Bc5 11.Nf3 Re8 12.0–0 Kg8 13.Bc3 Ra4 14.Re1 Qg6 15.Ne5? (Better is 15.Kf1 e4 16.Qe2–/+) 15...Qg3–+ 16.Qf3 Qf3 17.Nf3 Rf8 18.Bg7 (18.h4–+) 18...Kg7 (19.c3 Bh3–+) 0–1. Stiller – pcmvr (2055), ChessWorld.net, 2003.

4.d3 Nc6 5.Qd2 e5 6.Nc3 d5 7.ed5 Nd4 8.Nf3 Bb4 9.Ne5? Nd5–+ 10.Bb2 Nc3 11.Bc3 Re5 12.Kd1 Bg4 13.f3 Nf3! 14.gf3 Bf3 15.Kc1 Bc3 16.Qc3 Qg5 17.Qd2 Re1 18.Kb2 Qd2 19.Re1 Qe1 20.Rg1 Qb4 21.Kc1 Qd4 22.Rg5 0–0 23.Kd2 Re8 24.Rf5 Qb4 25.Kc1 Re1 0–1. sbderkach (1680) – pcmvr (2110), net–chess.com, 2006.

4.d3 e5!? =+.

4.d3 g6 5.Bd2= Ra8 6.Nf3 Bg7 7.c3 d6 8.Be2 c5 9.0–0 Qb6 10.e5 Nfd7 11.ed6? Qb2–+ 12.de7? Qa1 13.Ng5 Qa2 14.Bf3 h6 15.Ne4 Ke7 16.Qe2 Qe6 17.Qd1 Kf8 18.Re1 Qb6 19.d4 cd4 20.cd4 Bd4 21.Bf4 Nf6 22.Bd6 Kg7 23.Nbd2 Ra1 24.Qe2 Re1 25.Qe1 Re8 26.Bb8 Ne4 27.Ne4 f5 28.Qd2 Re4 29.Be4 fe4 30.h3 e3 31.Qe2 ef2 (32.Kh2 Qe6–+) 0–1. 73DADDELDU37 – romain63, mySchach.de, 2005.

3.Nf3 e5

4.d4 ed4 5.Nd4 g6 (5...Nf6 6.Qd2 b6 7.Nc3=+) 6.Nb3 Ra8 7.Bb2 Nf6 8.e4 Qe7 9.N1d2 d6 10.Bd3 Bg7 11.0–0 0–0 12.Re1 Be6 13.Nd4 Bg4 (< 13...Ba2 14.Bc4 Bc4 15.Ra8+/–) 14.f3 Bd7 15.Nc4 Qd8 16.e5 de5 17.Ne5 Bc8 18.Bc4 Nbd7? 19.Nf7 Rf7 20.Ne6 Qe7 21.Nc7 Qc5= 22.Kh1?? Qc7–+ 23.Bf7 Kf7 24.Bf6 Nf6 25.Qd3 Be6 26.f4 Rd8 27.Qa3 Rd2 28.f5?? Ng4 29.fe6 Kf6?? 30.Rf1? Rf2 31.Qb2?? Ke6 32.Rae1=+ Kf5 33.Qb5+– Be5 34.Qd3 Kf6 35.h3 Qc6 36.Re4?? Rf1 37.Qf1+– Ke6 38.Rc4 Qe8 39.hg4 Qd8 40.g5 Qg5 41.Rb4?? Qh5–+ 42.Kg1 Bh2 43.Kf2 Qc5 44.Ke2 Qb4 45.Qd1 Qg4 46.Ke1 Bg3 47.Kd2 Bf4 48.Ke1 Qh4 49.Ke2 Qg4 50.Ke1 Qd1 51.Kd1 h5 52.c4 g5 53.Kc2 h4 54.a4 g4 55.Kd3 h3 0–1. pinecrest1981 – j08, Live Game Caissa's Web, 2004.

4.e3 Nf6 5.Be2 Be7 6.0–0 0–0 7.Nc3 Re8 8.Bb2 Nc6 9.h3 e4 10.Nh2 d5 11.Nb1 d4–/+ 12.ed4 Nd4 13.Bc4 Bd6 14.Nc3 Bh2 15.Kh2 Nf3! 16.gf3 Qd7 17.Ne4 Qh3 18.Kg1 Rh5 19.Ng3 Qh2 0–1. kostaspetidis (2105) – pcmvr (2110), net–chess.com, 2006.

4.e4 Nf6 5.Bc4 Ne4–/+ 6.d3 Bb4 7.Bd2 Nd2–+ 8.Nfd2 d5 9.Bb3 Qf6 10.0–0 0–0 11.c3 Bd6 12.Nf3 e4 13.Nd4 c5 14.Ne2 c4! 15.dc4 dc4 16.Bc4 Bh2! 17.Kh2 Rh5 18.Kg1 Qh4 19.f3 e3 20.Qd4 Qh2 0–1. guerino (2100) – pcmvr (2110), net–chess.com, 2006.

4.e4 Nf6 5.d3 d5 6.ed5 Nd5 7.Bd2 Ra8 8.Ne5 Bc5 9.Qe2 0–0 10.Qd1?? Qf6 11.Nf3 Re8 12.Be2 Qa1 13.0–0 Nc6 14.Nc3 Qc3! 15.Bc3 Nc3 16.Qd2 Ne2 17.Kh1 Ra2 18.Re1 Bf2 19.Re2 Ra1 20.Ne1 Re2 21.Qe2 Re1 22.Qe1 Be1 23.g3 b5 (24.Kg2 Nd4–+) 0–1. iboyd (1950) – pcmvr (2110), net–chess.com, 2006.

3.Nf3 Nf6

4.Bb2 e6 5.e3 Be7 6.Be2 0–0 7.0–0 d5 8.d3 c5 9.Nbd2 b5 10.c4 bc4 11.dc4 Nc6 12.Nb3 Ra7 13.cd5 ed5 14.a3 Ne4 15.h3 Qd6 16.Nbd2 Qg6 17.Ne5 (17.Kh1!?–/+) 17...Ne5–+ 18.Be5 Bh3 19.Bf3 Ng5 20.Bd5 Rd7 21.gh3? (better is 21.Nf3 Rfd8 22.Ng5 Bg5 23.Qf3 Rd5 24.Qh3 Re5 25.f4 Bf4 26.ef4–+) 21...Rd5 (21...Nh3?! 22.Kh2 Rd5 23.f4–+) 22.Bg3 (22.Kh1–+) 22...Rd2! (22...Nh3?! 23.Kg2 Rfd8 24.Ra2–+) 23.Qg4 (23.Qd2 Nf3 Double attack (23...Nf3 Decoy)) 23...h5 24.Qf4 (24.Qc4 Ne4 25.Qe4 Qe4–+) 24...Nh3 (24...Nh3 25.Kh2 Nf4 26.Bf4 Bh4–+) 0–1. Hovla1 – PeterRs, ChessWorld.net, 2015.

4.Nc3 e5 5.e4 Bb4 6.Bb2 0–0 7.a3 Bc5 8.Bc4 (8.Ne5 Re8 9.d4 Bd4 10.Nf7 Ne4 11.Qd4 Nf6 12.Be2 Kf7=) 8...d6 9.Ng5 (better is 9.d4!? ed4 10.Nd4=+) 9...Bf2!–/+ 10.Kf2 Ng4 11.Kg1 Qg5 12.Qf3 (12.Qe2!?–/+) 12...Qd2–+ 13.Nd5 Rd5 (13...Qc2 14.Qe2 Qe2 15.Be2–+) 14.Bd5 Qa5 15.Bc3?? (better is 15.Bb3–+) 15...Qc5 16.Kf1 Ne3 17.Ke2 (17.Ke1 Qc3 18.Kf2 Nd5 19.ed5 Qc2 20.Ke1–+) 17...Bg4 (17...Qc3?! 18.Qe3 Qc2 19.Kf3–/+; 17...Nc2 18.Rac1 Bg4 19.Rc2 Bf3 20.Kf3–+) 18.Bb4 Bf3 19.Kf3 Qd4 20.Bb7 Nc2 21.Rad1 Qe3 22.Kg4 Qf4 (23.Kh3 Ne3 24.Bc8 Rc8 25.Bd6 Qg4) 0–1. gdraper (1715) – pcmvr (1700), net–chess.com, 2006.

4.d4 e6 5.Bd2 Ra8 6.Nc3 b6 7.e4 Bb7 8.Bd3 Be7 9.0–0 d6 10.Qe2 0–0 11.e5 de5 12.de5 Nfd7 13.Rfd1 Qc8 14.Bg5 Re8 15.Be4 Nc5 16.Bb7 Qb7?? (better is 16...Nb7 17.Qe4 Bc5+=) 17.Be7+– Nc6 (17...Nbd7 18.Bc5 Nc5 19.Rd2+–) 18.Bc5 bc5 19.Rab1 Qa7 20.Qe4 Ne7 21.Ng5 Ng6 22.Rd7 Rf8 23.a4 h6 (23...Rab8+–) 24.Ne6 Rfe8 25.Nc7 Re5 (25...Ne5 26.Ne8 Nd7+–) 26.Qa8 Qa8 27.Na8 1–0. usingprogram – gargantuel21, internet, 2011.

3.Nf3 g6

4.Bb2 f6 5.Nc3 Bg7 6.e4 Nc6 7.Nb5 e6 8.Bd3 d6 9.Bc3 Ra8 10.Qe2 Bd7 11.Bc4 Ke7 12.0–0 Kf8 13.Nbd4 Qe7 14.Nc6 Bc6 15.Rfb1 Qd7 16.Nd4 Re8 17.f4 e5 18.fe5 de5 (better is 18...fe5 19.Nc6 bc6+–) 19.Bb4 Re7 20.Ne6 Ke8 21.Be7 Qe7 22.a4 (22.Ng7?! Qg7 23.a4 Qd7+–) 22...Nh6 23.a5 Bf8 24.a6 ba6 25.Rb8 Kd7 26.Ra6 Nf7 27.Qd3 Nd6 28.Nc5 1–0. pierred (2765) – grahamtrue (2125), net–chess.com, 2011.

4.Bb2 Nf6 5.g3 Bg7 6.Bg2 0–0 7.0–0 d6 8.Bc3 Ra7 9.d3 c5 10.Nbd2 b5 11.a3 Bb7 12.Qb1 Qb6 13.e4 Nbd7 14.Re1 Rfa8 15.Qb2 e6 16.Reb1 Bc6 17.e5 Nd5–/+ 18.Ne4 Nc3–+ 19.Qc3? Ne5 20.Qb3 c4 21.Qc3 Nf3 (22.Bf3 Bc3 23.Nc3 cd3 24.cd3 Bf3 25.Nb5 Ra5–+) 0–1. Skean Du – PeterRs, ChessWorld.net, 2006.

2.ba5 b5

3.Bb2 c6 4.Bc3 Na6 5.g3 Bb7 6.Bg2 Qa5?? 7.Ba5+– Nc7 8.Bc7 Rc8 9.Ba5 d6 10.Nf3 Nf6 11.0–0 c5 12.d4 Bc6 13.dc5 dc5 14.Ne5 Nd5 15.Nc6 Rc6 16.Qd5 e6 17.Qd8 1–0. tomy (2255) – idontknow, net–chess.com, 2006.

3.d4 c6 4.Bd2+= Na6 5.a4 Qa5?? 6.Ba5+– Bb7 7.Nf3 Nc7 8.Bc7 Rc8 9.Bb6 Ba6 10.e3 Rb8 11.a5 Rb6 12.ab6 d6 13.Ra6 e6 14.b7 Be7 15.b8Q Kd7 16.Ra7 1–0. hsingletary (2135) – idontknow, net–chess.com, 2006.

3.d4 Nf6 4.Nf3 =.

3.ab6 cb6

4.Bb2 Na6 5.e4 Bb7 6.Nc3 Qc7 7.d4 0–0–0? 8.Nf3 e6 9.a4 Bb4+/– 10.Qd2 Nf6= 11.Bd3 Rhe8 12.e5 Ne4 13.Be4 f6?? 14.Bb7+– Qb7 15.0–0 fe5 16.Ne5 Rf8 17.Qe3 Rf6 18.Nb5 Qd5 19.c4 Qa8 20.Rac1 d6 21.c5 de5 22.cb6 Kb8 23.Qe5 Kb7 24.Rc4 Rf5 25.Qe6 Bf8 26.Rfc1 g6 27.Rc7! Kb8 28.Rc8 Kb7 29.Qc6 1–0. alaamattar (2165) – idontknow, net–chess.com, 2006.

4.Nf3 +/–.

2.ba5 c5

3.c4 Nc6 4.e3 (4.Nf3 e5=) 4...Qa5 (4...e5 5.Bb2=) 5.Bb2 Nf6 6.Nf3 Qb6 (6...d6 7.Bc3 Qc7 8.d4=) 7.Bc3 (7.Bf6 gf6 8.Nc3 Bg7+=) 7...d6 8.a3 (8.d4 Bg4=) 8...Bg4 (8...e5 9.Be2=) 9.Be2 e5 10.0–0 (10.h3 Bh5=) 10...Be7 11.h3 Bh5 12.d3 0–0 13.Nbd2 Ra7 14.Rb1 Qc7 15.Bb2 Rfa8 16.g4 Bg6 17.Kh1 e4 18.Ne1 Ne5=+ 19.f4 ef3 20.Ndf3= d5?? 21.Be5 Qd7 22.Nh4 dc4 23.Ng6 hg6 24.Nc2?? Qd5–/+ 25.Bf3 Qe5 26.Bb7 Rb8 27.Bf3 (27...Rb1 28.Qb1–+). bentengutama (2170) – igorm (2290), net–chess.com, 2003.

3.c4 d6 4.e4 Nc6 5.Nc3 g6 6.Nf3 Bg7 7.Bd3 (7.Bb2 Nf6 8.Nd5 0–0=) 7...Qa5 (7...Bc3 8.dc3 Qa5=) 8.0–0 (better is 8.Bb2!?=) 8...Bc3–/+ 9.dc3 Qc3 10.Bg5 (10.Rb1 Ra2 11.Re1–/+) 10...Ne5 (10...Bg4!?–/+) 11.Ne5+= Qe5 12.Be3 (12.Qc1 Nf6+=) 12...Nf6 13.f4 Qc3 14.a4 0–0 (14...Bd7 15.Rc1 Qb4 16.e5 de5 17.Rb1 Ba4 18.Rb4 Bd1 19.Bc5+=) 15.Qd2= Qd2 16.Bd2 Bd7 (16...b6 17.Bc3+=) 17.a5 Ra7 (17...Bc6 18.Rfe1+=) 18.Bc3 (18.Rfe1 Rd8=) 18...Rfa8 (18...Bc6 19.Rfe1+=) 19.Kf2 (better is 19.e5 de5 20.fe5=) 19...b6?? (better is 19...Ng4 20.Kg3 e5+=) 20.ab6+– Ra1 21.Ra1 Ra1?? 22.b7 Ra2 23.Kf1 Bc6 24.b8Q (24.b8Q Ne8 25.Qb6+–) 1–0. jdzg – toxm, internet, 2009.

3.d4 Nc6 (3...cd4 4.Qd4 Qa5 5.Bd2=) 4.dc5 (4.d5 Qa5 5.c3 Ne5=) 4...Qa5=+ 5.Bd2 Qc5 6.Nc3 (6.e3 d5=+) 6...d5 (6...Nf6 7.e3=+) 7.e3 (7.e4 Nf6 8.ed5 Nd5=+) 7...Nf6=+ 8.f3 (8.Nb5 Ne5=+) 8...e5–/+ 9.a4 d4 (9...Be7 10.Bd3–/+) 10.ed4 Nd4 11.Nge2 Bd7 (better 11...Nd5=+) 12.Be3? (better 12.Nd4!? ed4 13.Nb5=+) 12...Nc2! 13.Qc2 Qe3 14.a5? (better 14.Qb2 Bc6 15.Rc1–+) 14...Bb4 15.h4 (15.Qd2 Qd2 16.Kd2 Ba5 17.Rb1–+) 15...Rc8 (15...Nd5! 16.Ra3 Nc3 17.Rc3–+) 16.Qd2 (16.Rc1 Rc3 17.Qc3–+) 16…Bc3 (16...Bc3 17.Qc3 Rc3–+) 0–1. afsharian – aptyu, lichess.org, 2017.

3.d4 e6 4.dc5 (4.e3 d5=) 4...Bc5 5.Bd2 (5.Nf3 d5=) 5...Nc6 (better 5...Qf6!? 6.e3 Qa1–/+) 6.Nc3 (6.e3 Nf6=) 6...Nf6 7.e3 0–0 8.Rb1 (8.Na4 Bb4 9.Bb4 Nb4=+) 8...Na5 (8...Bb4 9.a6=+) 9.Nb5 (9.Na4 Be7=+) 9...Nd5 (9...Nc6–/+) 10.Ba5? (10.c4!? Nf6 11.Nf3=+) 10...Ra5 (better 10...Qa5 11.Qd2 Qa2–+) 11.Nd6?? (better 11.a3–/+) 11...Bd6 (11...Nc3 12.Qc1 Nb1 13.Qb1 Bd6 14.Bd3–+) 12.Qd2 Qc7 (better 12...Be5 13.Ne2 Ra2–+) 13.Rb5 (13.c4 Be5 14.Ne2–+) 13...Rb5 14.Bb5 Qc3 (better 14...Bb4 15.Bd3–+) 15.Nf3 (15.Qc3 Nc3 16.Bd3 Bb4–+) 15...Qd2 (better 15...Qa1 16.Qd1 Bb4 17.Nd2 Qd1 18.Kd1 Nc3 19.Ke1 Nb5 20.Ke2–+) 16.Nd2 (16.Kd2 Bb4 17.Kd3 Nc3–+) 16...Nc3 17.Bc4 (17.Bd3 Bb4–+) 17...b5 18.Bb3 (18.Bd3 Bb7 19.0–0 Bc6–+) 18...Bb7 (18...Bb4 19.Kf1–+) 19.0–0 Bd5 (19...Be5!? 20.f4 Bf6 21.g4–+) 20.Bd5 Nd5 (20...ed5 21.Nb1 Na2 22.Rd1–+) 21.c4 bc4 22.Nc4 Be7 23.Rd1 (23.Rb1 Ra8–+) 23...Ra8 (23...Rc8 24.Ne5–+) 24.e4 Nc3 (24...Nf4 25.Rd7 Ra2 26.h3–+) 25.Rd7 Ra2 26.h3 Bf8 (26...Kf8 27.Rc7 Bh4 28.Rc8 Ke7 29.g3 Ne2 30.Kf1 Bg3 31.e5–+) 27.Nd6 (27.e5–+) 27...Ne4! 28.Ne4 f5 (28...h6 29.g4–/+) 29.Ng5 h6 (better 29...Ra6!?–/+) 30.Ne6= Ra1 (30...Re2 31.Nf4 Rc2 32.Kf1=) 31.Kh2 Ra6 (31...Re1 32.Nf4 Be7=) 32.Nf4 (better 32.Nf8!? Kf8 33.g4=) 32...Bd6=+ 33.Kg3?? (33.g3=+) 33...Bf4 (better 33...g5–+) 34.Kf4= g5 (better 34...Ra2 35.Ke3 Ra3 36.Rd3 Rd3 37.Kd3 Kf7=) 35.Kf5+– Ra2 (35...Ra5 36.Kg6 Ra6 37.Kh5+–) 36.Kg6 Kf8 (better 36...Ra6 37.Kh5 Rf6+–) 37.Rf7 (worse 37.Kh6 Rf2 38.g4 Rf3+–) 37...Ke8 38.g4 (38.Rf5 Ra6 39.Rf6 Ra4+–) 38...Ra6 (38...Ra3 39.f3+–) 39.Kg7 (better 39.Rf6 Ra3 40.Kh6 Rh3 41.Kg5+–) 39...h5? (39...Ra3 40.Rf6 Rh3 41.Rh6 Rd3+–) 40.gh5 Ra4 41.h6 Rh4 42.h7 Rh7 43.Kh7 Kf7 44.Kh6 Kf6 45.Kh5 Kf5 46.f3 Kf4 (46...Kf6 47.Kh6 Kf5 48.Kg7+–) 47.Kg6 Kg3 48.Kg5 Kh3 49.f4 1–0. afsharian (1680) – Schachfurz (1640), lichess.org, 2017.

3.e4 d5 4.ed5 Qd5 5.Nc3 Qe6 6.Be2 Ra5 7.Nf3 h6 (7...Nc6 8.0–0=) 8.0–0+/– Nc6 9.Re1 Qd7 (9...Qd6 10.Bb5 Bg4 11.Ne4+/–) 10.Bc4 (10.Bb5 Qc7+/–) 10...e6+= 11.d3 Nf6 12.Bd2 Be7 13.Ne4 Ra8 14.Bc3 Nd4 15.Rb1 0–0 16.Ne5 Qc7 17.f4 Nd5 18.Qd2 b6 19.Ba1 Bb7 20.Qf2 f6 21.Ng6+/– Rf7 22.Bd4 cd4 23.Qd4 Rd8 24.Bd5 Rd5? 25.Qb6+– Bd6 26.Qc7 Rc7 27.Rb6 Bc5? 28.Nc5 Rdc5 29.c4 Kf7 30.Nh4 g6? 31.Ree6 R5c6 32.Rec6 Bc6 33.Kf2 1–0. Wall,Bill – Bochkin, Internet, 2003.

3.Nf3 d5 4.e3 g6 (4...Qa5 5.c4=) 5.Bb2+= White launches an attack 5...f6 6.c4 e6 7.cd5 Qd5 (7...ed5 8.Bb5 Bd7 9.Be2+=) 8.Bb5+/– Kf7 9.Nc3 Qd8 10.0–0 Ra5 11.a4 Bg7 (11...Bd7 12.d4+/–) 12.Ne4 b6 13.d4 Bb7 14.Ng3 (14.Qc2 Qd5 15.Bd3 Nd7+/–) 14…f5 (14...f5 15.Rc1 Ra7+/–; 14...Bc6 15.Qe2+/–). Stabenow,Juergen – Haantola, corr Th–EL–53–19 (year?).

3.Bb2 Qa5

4.Bc3 Qa4 5.e3 Nc6 6.Nf3 d5 7.Be2 Bf5 8.d3 d4 9.ed4 cd4 10.Bb2?? (better is 10.Bd2+=) 10...Qb4–+ 11.Nbd2 Qb2 12.Rb1 Qa2 13.Rb7 Nf6 14.0–0 Nd5 15.Re1 (15.Ne4 e6–+) 15...e6 16.Qb1 Bb4 17.Qa2 Ra2 18.Bd1 0–0 19.h3 e5! 20.g4 (20.Ne5 Bd2 Deflection) 20...Be6 21.Rb4 Ndb4 22.Ne5 Ne5 23.Re5 Ra1 24.Re1 Nc2! 25.Rf1 (25.Bc2 Re1 Pinning (25...Re1 Deflection)) 25...Nb4 26.Be2 (26.Nf3 Nc6–+) 26...Ra2 27.Rd1 Nd5 0–1. mckenna215 – EytonWiener, ChessWorld.net, 2015.

4.e3 Nc6 5.Bc3 Qa4 6.d4 d6 7.dc5 dc5 8.Nf3 Bf5 9.Bd3 Rd8 10.Qe2 Bd3 11.cd3 Nf6 12.0–0 Nd5 13.Qb2 Nc3 14.Nc3 Qa8 15.Qb6 e6 16.Nb5 Bd6 17.Rfd1 0–0 18.Nd6 Rd6 19.Qc5 Rfd8 20.Qh5 g6 21.Qh6 f6 22.Qh4 Kg7 23.Ne1 Ne5 24.d4 Nc4 25.Rdc1 Na3 (25...Rc6 26.Nd3+–) 26.Rc7 R8d7 27.Rac1 (27.Qg3 Qa6 28.Rac1 Nb5+–) 27...Qa5+– 28.Rc8 Rc6 29.R8c6 bc6 30.Qh3 (better 30.Qe4!? Qd5 31.Qd3 Qa2 32.Qa6+–) 30...Qd2+= 31.Ra1 Qb2 32.Qe6 (better 32.Rd1 Qa2 33.Rc1+=) 32...Rf7?? (better 32...Qa1 33.Qd7 Kh6=) 33.Rd1+– Qa2?? (33...Nb5 34.Nd3 Qc2+–) 34.Qa2 (34.Qa2 Nb5 35.Qc4+–) 1–0. anotherheaven (1815) – TakinTheKing (1665), lichess.org, 2015.

4.Nf3 Nc6 5.a3 (5.Nc3 Nf6=) 5...d5 6.e3 Bg4 7.Be2 e6 8.0–0 Qc7 (8...Nf6 9.Bf6 gf6 10.Nc3=) 9.d3 f6 10.Nbd2 Bd6 11.Re1 (11.h3 Bh5=) 11...Nge7 12.h3 h5 (12...Bf3!? 13.Bf3 0–0=+) 13.c4+= b6 14.cd5 (14.Rb1 Bf5+=) 14...Nd5 (14...ed5 15.Qb3=) 15.d4 cd4 16.Bd4 (better 16.ed4 Kf7 17.Bb5 Bh2 18.Kf1 Bf3 19.Qf3+=) 16...Bf5?? (better 16...Nd4!? 17.Nd4 Be2 18.Qe2 Qd7+=) 17.Qb3 (17.e4 Nd4 18.Nd4 Nc3 19.Bh5 Kd7+–) 17...g5? (better 17...Bg6+–) 18.e4+– Nd4 (18...g4 19.Bb5 Nde7 20.Bf6 0–0 21.Be7 Ne7+–) 19.Nd4 e5 (19...Bh2 20.Kh1 Qc3 21.Qb5 Kd8 22.Nc6 (worse 22.Kh2 Qd4 23.ed5 Ra5+–; worse 22.ed5 Qd4 23.de6 Be6+–) 22...Kc7 23.Rac1 (worse 23.Kh2 Qd2 24.ef5 Nc3+–; 23.ef5 Qd2 24.Nb4 Be5 25.Rac1 Kb8 26.fe6 Ra5 27.Nc6 Kb7 28.Na5 Qa5 29.Qc6 Kb8+–) 23...Qd2 24.Ne5 Qc1 25.Rc1 Kd6 26.ed5 Be5 27.Qb6 Ke7 28.Qb7 Kf8 29.Qa8 Kg7 30.Rc8 Rc8 31.Qc8+–) 20.Nf5 (better 20.Qd5!? ed4 21.Bb5 Kf8 22.Qa8 Kg7+–) 20...Nf4 21.Nd6 Qd6 22.Bb5 Kd8 (22...Ke7 23.Nc4 Qc7 24.Ne3+–) 23.Rad1 Qc5 (23...Ne6 24.Nc4 Nd4 25.Rd4 Qd4 26.Rd1+–) 24.Nc4 (better 24.Nf3 Kc8 25.Rc1 g4 26.Rc5 bc5+–) 24...Kc7 25.Rd2 (better 25.Rd7 Kb8 26.Rd6 Rc8+–) 25...Rhd8 26.Red1 (26.Na5 Rd2 27.Qf7 Kd8 28.Nb7 Kc8 29.Nc5 bc5 30.Qe8 Kc7 31.Qc6 Kd8 32.Qa8 Kc7 33.Qa7 Kc8 34.Qc5 Kd8 35.Qf8 Kc7 36.Rc1 Rc2 37.Rc2 Kb6 38.Qb8 Ka5 39.Qa7 Kb5 40.Rc5) 26...Rd2 27.Rd2 Rd8 28.Rd8 (28.Rc2 Kb8 29.Bd7 Ne2 30.Re2 Rd7 31.Nb6 Qc1 32.Kh2 Rc7+–) 28...Kd8 29.Qd1 (better 29.Ne3+–) 29...Kc7 (29...Qd4 30.Qf3+–) 30.a4 (30.Qd7 Kb8 31.Bc6 Ne2 32.Kh1 Qc6 33.Qc6 Nd4 34.Qd7 Nb5 35.Qb5 Kc8 36.Nb6 Kc7 37.Nd5 Kc8 38.Qc6 Kb8 39.Qc7 Ka8 40.Nb6) 30...g4 (30...Qd4 31.Qf3+–) 31.hg4 (31.Qd7 Kb8 32.Bc6 Ne2 33.Kh1 Qc6 34.Qc6 Nd4 35.Qe8 Kc7 36.Qe7 Kc6 37.Qd6 Kb7 38.Qd7 Kb8 39.Nd6 gh3 40.Qb7) 31...hg4 (31...Qd4 32.Qc2 Kb8 33.gh5 Nh5+–) 32.g3 (better 32.Qd7 Kb8 33.Bc6 Qc6 34.Qc6 Ne2 35.Kf1 Nd4 36.Qe8 Kc7 37.Qe7 Kc6 38.Qd6 Kb7 39.Qd7 Kb8 40.Nd6 f5 41.Qb7) 32...Nh3 33.Kh1?? (better 33.Kg2 Qf2 34.Kh1 Qf3 35.Qf3 gf3 36.Nd2+–) 33...Nf2 34.Kh2 (34.Kg1 Nd1 35.Ne3 Qe3 36.Kh2 Qf2 37.Kh1 Qg3 38.Bc6 Nf2) 34...Nd1 35.a5 (35.Ne3 Qe3 36.a5 Qf2 37.Kh1 Qg3 38.ab6 Kb6 39.Bc6 Nf2) 35...Qf2 36.Kh1 Ne3 (36...Qg3 37.ab6 Kb8 38.Ne5 Nf2) 37.ab6–+ Kb7 38.Bd7 Qg2 0–1. Dino_Jarach (1755) – vecino1979 (1815), lichess.org, 2020.

4.g3 b5 5.Bg2 Nc6 6.Nf3 Qb4 7.Qc1 Bb7 (7...e6 8.a3 Qa5 9.0–0=) 8.Nc3 (8.Ba3 Qa5 9.Bc5 Nf6+=) 8...Qa5 9.0–0 e6 10.a4 b4 11.Nd1 (11.Nb5 Nf6=) 11...d5 12.Ne3 (12.c4 Nge7=) 12...Nf6=+ 13.Ne5 Ne5 14.Be5 Nd7 15.Bb2 f6 16.c3 Be7 17.cb4 (17.f4 c4=) 17...Qb4 a4 becomes a target (17...cb4 18.Bd4=+) 18.Bc3= Qb6 19.Nc2 Qc7 (19...d4 20.Rb1 Bg2 21.Rb6 Bf1 22.Rb1 Be2 23.Bd4=+) 20.d4 (20.d3 0–0=) 20...c4 (20...Nb6 21.a5 Nc4 22.Qf4 Qf4 23.gf4=) 21.Ne3 (21.Qe3 e5=) 21...0–0= 22.Bh3 Qd6?? (22...f5 23.Qc2=) 23.Qc2?? (better 23.Rb1 Qc6 24.Rb7 Qb7 25.Be6 Kh8 26.Bd5+– (26.Nd5?! Qc6+=)) 23...Bc6= 24.a5 Rfb8 25.Bg2 Rb3 26.Rfb1 Ra3?? (26...Rab8 27.a6=) 27.Bb4?? (27.Ra3 Qa3 28.Nc4 Qa4 29.Qa4 Ba4+–) 27...Ra1?? (better 27...Qb4 28.Rb4 Ra1 29.Rb1 R8a5 30.Nc4 Rb1 31.Qb1 Ra4=) 28.Bd6+– Rb1 29.Qb1 Bd6 30.Nc4! Bc7 (30...dc4 31.Bc6 Pinning (31.Bc6 Deflection)) 31.Nb6 (better 31.Qb4 Kf7 32.Nd6 Kg8 33.Nb7+–) 31...Rb8?? (31...Ra5 32.Bh3 Kf7 33.Nd7 Bd7 34.Qh7+–) 32.Qd3 (better 32.Qc2 Nb6 33.Qc6+– (33.ab6?! Rb6 34.e4 de4+–)) 32...Nb6+– 33.ab6 Bb6 34.Qa6 (34.e4 de4 35.Be4 Be4 36.Qe4 Kh8+–) 34...Bd7 (34...Kf7 35.e3+–) 35.Bh3 (35.Qa3!? Bd4 36.Bd5+–) 35...Kf7+– 36.Qd3 Ba7 37.Qh7 (37.e3 g6+–) 37...Bd4+= 38.Qh5 Ke7 (better 38...Kg8!?+=) 39.Qg4+– Be5 40.Qg7 Kd6 41.Qh6 f5? (better 41...Ba4+–) 42.Bf5 d4 (42...Rh8 43.Qg6+–) 43.f4 Bh8 44.Bd3 Kd5 45.Qh7 e5 (45...Kd6+–) 46.Qd7 (46.Qd7 Kc5 47.Qc7 Kb4 48.Qb8 Kc5 49.Qc7 Kb4 50.Qc4 Ka3 51.Qb5 Ka2 52.Qb1 Ka3 53.Bc2 ef4 54.Qb3) 1–0. JUANKARODA (1795) – Rf90q7 (1830), lichess.org, 2020.

3.e4 Qa5

4.Nc3 Nc6 5.Nf3 +=.

4.Nc3 e6 5.Nf3+= Nc6 6.Bb2 b6 (6...Be7!?+=) 7.Nb5+/– Kd8 8.a4 Qb4? (better is 8...Nh6 9.Bc3 Nb4+/–) 9.Ng5+– Qb2 10.Nf7 Ke7 11.Nh8 Qf6? (11...Qe5 12.Bd3+–) 12.c3?? (better is 12.Bc4+–) 12...g6 13.Ng6 (13.Nc7 Rb8 14.Ng6 Qg6+/–) 13...Qg6+= 14.f3 Ba6 (14...Kd8 15.d4+=) 15.d4 (15.Nc7 Bf1 16.Na8 Bg2+–) 15...Bb5 (15...cd4!? 16.cd4 Qg5+=) 16.ab5+/– (< 16.Bb5 Qg2 17.Rf1 Qh2 18.dc5 Bg7–/+) 16...Na5 17.dc5 bc5 18.e5 (18.b6 Bg7 19.Ra3 d6+/–) 18...Kd8 (18...Qg5!? 19.Qe2 Bg7+=) 19.b6 Qg7 20.f4 d5 21.Qa4 Qb7 22.Qb5 Nc4 23.Ra8 Qa8 24.Bc4 (better is 24.Qb3+/–) 24...dc4?? (24...Qa1 25.Kf2 Qh1+–) 25.0–0+– Ne7 26.Qc5 Qc6 27.Rd1 Kc8 28.Qa5 Nd5 29.Qa6 Kb8? 30.Qa7 Kc8 31.Rb1 (31...Bc5 32.Kh1 Bb6 33.Qf7+/– (33.Qh7?! Nf4 34.Qg8 Bd8+=); better is 31.Kh1!?+–) 1–0. Rob (1610) – vissky, internet, 2007.

3.e4 Nc6

4.a6 ba6 5.Nc3 Rb8 6.Bc4 g6 7.Ba3 Qa5 8.Qc1 Bg7 9.Nge2 Nf6 10.f3 e6 11.Bb3 0–0 12.Rb1 Re8 13.0–0 d5 14.Bb2 Bd7 15.a3 c4 16.Ba4 d4 17.Bc6 dc3 (17...Bc6?! 18.Na2 e5 19.Nb4–/+) 18.Bc3 Qc5 19.Bd4 Qc6 20.Be3 Qc7 21.d4 Rb1 22.Qb1 Rb8 23.Qa2 Qc6 24.Nc3 Ne8 25.Rb1 Rb1 26.Qb1 Nd6 27.Qb8 Ne8?? 28.Qb2?? Bc8 29.Ne2 Qb5 30.Qb5 ab5 31.c3 Bb7 (32.Nf4 Bf8–+) 0–1. Ruszin,Peter (1915) – Simon,Nandor (2090), ch junior team Spatak II–Szarvas, 1998.

4.Nf3 d6 5.Nc3 g6 6.Bb2 Bg7 7.Be2 Nf6 8.0–0 (8.Rb1 Ra5 9.Bc4 0–0=) 8...0–0 (8...Ne4 9.Ne4 Bb2 10.Rb1–/+) 9.Qb1 Qa5 10.Re1 e6 11.Bf1 Nd7 12.Nb5 Nde5 13.Ne5 (worse is 13.Nd6 Nf3 14.gf3 Qd2 15.Bg7 Kg7+=) 13...Ne5 14.Bc3 Qd8 15.Qb2 Qg5 16.Re3 Rd8 17.Rae1 (17.Be2 Ra4=) 17...b6 18.Rg3 Qf4 19.Ree3 h5 20.Nc7 Rb8 21.Be2 h4 22.Rh3 g5 23.g3 hg3 24.hg3 Qf6 25.Kg2 Qe7 26.Nb5 f6 27.f4 (27.d4 cd4 28.Bd4 Nc6+=) 27...Ng6 (27...gf4 28.gf4 Ng6 29.Kf3=) 28.fg5 fg5 29.Bg7 Qg7 30.Qg7 Kg7 31.Rh5 Ba6 32.a4 d5 33.Rg5 (33.Nc7 Bc8 34.ed5 ed5 35.Rg5 d4+–) 33...Kf6 34.Rh5 de4 35.Nc3 Bb7 36.Nb1 Rg8 37.Kf2 Rbd8 38.Rb3 Rd6 39.a5! Rb8 40.ab6 Bd5 41.Nc3 Bb3 42.Ne4 Kg7 43.Nd6 Rb6 44.Ne8 Kf8 45.cb3 Ke8 46.Rc5 Rb3 47.Bh5 Kf7 48.Rg5 Rb2 49.Ke2 Rb4 50.Rg6 Ke7 51.Rg7 Kf6 52.Rf7 Ke5 53.Bf3 Rd4 54.g4 Rd8 55.Ke3 Rd4 56.Rf8 Rd7 57.Be2 Rd4 58.g5 Rd7 59.g6 Rg7 60.d4 Kd6 61.Bh5 e5 62.Rf6 Kd5 63.Bf3 Kc4 64.de5 Kc5 65.Ke4 Rg8 66.Kf5 Kd4 67.e6 Kc5 68.e7 1–0. Diviak,Rudolf (1890) – Vegh,Vince (1915), SVK–chT3A2, 2009.

4.Nf3 e6 5.Nc3 d5 6.Bb5 (6.ed5 ed5 7.Bb5 Qe7 (worse 7...Qa5 8.Qe2 Be6 9.Nd5+–) 8.Qe2 Qe2 9.Ke2 d4 (worse 9...Ra5 10.Nd5 Bd7 11.Bb2+–) 10.Bc6 bc6=) 6...de4 (6...d4 7.Bc6 bc6 8.Ne2=) 7.Ne4 (7.Bc6 bc6 8.Ne4 Nf6+=) 7...Nf6 8.Qe2 (8.Bc6 bc6 9.Qe2 Ne4 10.Qe4 Qd5+=) 8...Be7 (8...Bd7 9.Bb2 Ne4 10.Qe4 Qa5 11.c4+=) 9.Bb2 (9.Bc6 bc6 10.Bb2 0–0+=) 9...0–0 (9...Bd7 10.0–0+=) 10.Bc6 bc6 11.Nf6 Bf6 12.Bf6 Qf6 13.0–0 Ra5 14.Ne5 Ba6 15.c4 (15.d3 Rc8+=) 15...Ra8+= 16.d3 (16.Rfb1 Bc8+=) 16...Ra3 17.Rfd1 Qd8 18.Rab1 (18.Qe4 Qd6+=) 18...Bc8= 19.Rd2 (19.d4 Ra2 20.dc5 Qe8+= (20...Re2?? 21.Rd8)) 19...f6 20.Ng4 (worse 20.Nc6 Qd6 21.Rb6 R8a6–+) 20...e5 21.Ne3 Be6 22.h3 (22.Rb7 R8a4=) 22...Bf7=+ 23.Rb3 (23.Qf3 Qd7=+) 23...R3a7 (23...Rb3 24.ab3 Ra3 25.Rb2=+) 24.h4 (24.Nf5 Be6 25.Ng3 Ra3=) 24...h6 25.Qg4 (25.Rdb2 Ra3=) 25...h5 (25...Qd4 26.Rbb2=+) 26.Qg3 Kh7 (26...Qd7 27.Rbb2=+) 27.Qf3= Bg6 (27...Ra2 28.Ra2 Ra2 29.Rb7= (worse 29.Qc6 Qa5 30.Rb1 Bg6–/+)) 28.Qc6 Qd4 29.g3 (29.Rbb2!?=) 29...Ra2=+ 30.Ra2 Ra2 31.Rb7 Qa1 (31...Qd3? 32.Qc7 Ra1 33.Kh2 Rh1 34.Kh1 Be4 35.Kg1 Bb7 36.Qb7+–; 31...Bd3?! 32.Qf6 Qa1 33.Kh2 Rf2 34.Qf2=) 32.Kg2 Qe1?? (better 32...Ra7 33.Ra7 Qa7–/+) 33.Qf6+– Ra7 1–0. Bulanov,Dmitri (2360) – Svjatocho,Andrej (2035), Bronstein Memorial, 2017.

2.ba5 Nc6

3.a6 Ra6 4.e3 Ra8 5.Bb2 Nf6 6.Nf3 d6 7.Be2 (7.Bf6 gf6 8.Bb5 Bd7=) 7...e5+= 8.0–0 Be7 9.c4 0–0 10.Nc3 e4 (10...Bf5 11.d4=) 11.Nd4 (11.Ng5!?+=) 11...Ne5 12.d3 Nd3 13.Bd3 ed3 14.Qd3 Bg4 15.Ne4 Ne4 16.Qe4 Bh5 (16...Qd7!?=) 17.Nf5 Bf6 18.Bf6 Qf6 19.Ng3 Bg6 20.Qb7 c5 21.Rfd1 Ra4 22.Qd5 Ra6 (22...Bc2 23.Rdc1+/–) 23.h3 (23.e4 Rb8+/–) 23...h6 24.Ne4 Be4 25.Qe4 Rfa8 26.Qd5 Ra2 27.Ra2 (27.Qa8!? Ra8 28.Ra8 Kh7 29.Ra7+/–) 27...Ra2= 28.Qd6?? Qf2 (28...Qf2 29.Kh2 Qg2#) 0–1. alfons78 – sierrzant1 (1770), kurnik, 2012.

3.Bb2 d5 4.d3 e5+= 5.Nd2 f6 6.Ngf3 Be6 7.e3 Bb4 8.a3 (8.a3 Ba5 9.Be2+=). sunnyda – koneserkonesera (1660), kurnik, 2011.

3.e4 Na5 4.Bb2 e6 5.d4 c5 6.dc5+= Nf6 7.e5 Ne4 8.Bd3 Nc5= 9.Nf3 Nc6 10.0–0 Qc7 11.Ba3 Nd3 12.Bf8 Nf2 13.Qd6 Qb6–/+ 14.Rf2 Qb2 15.Bg7 Rg8 16.Bf6 Qa1 17.Nfd2 Ra2 18.Qd3 Rg6 19.Qh3 h6 20.Qf3?! Rc2 21.Bh8 Rc1 22.Nf1 Qb1 23.Qf7 Kd8 24.Qf8 Kc7 25.Qd6 Kb6 26.Bf6 Rd1 27.Bd8 Ka7 28.Qa3 Kb8 (29.Bf6 Qe4–+) 0–1. Mango – Wall,Bill, Internet, 2005.

3.e4 Nf6 4.Nc3 =.

3.Nf3 e5 =.

3.Nf3 e6 4.Bb2 Nf6 5.e3 Na5 6.Be2 Be7 7.0–0 d5 (7...0–0 8.Nc3=) 8.d4 (8.Ne5 0–0=) 8...0–0 9.Nbd2 b6 10.c4 Ba6 11.cd5 Be2 12.Qe2 ed5 13.a4 Re8=+ 14.Rfc1 Bd6 15.h3 Ne4 16.Ba3 Re6 17.Bd6= Nd6 18.Ne5 f6 19.Nc6 Qd7 20.Na5 Ra5 21.Qd1 Nb7 22.Qc2 c5 23.dc5 Rc5 24.Qf5 Rd6 25.Qd7+= Rd7 26.Rc5 Nc5=+ 27.Nb1 d4 28.ed4 Rd4 29.Nc3 Rc4 30.Ra3 Rd4 (30...Kf7 31.Kf1=+) ½–½. Unger – Hansen,Bjarne G, corr 3GMM–15, 1995.

3.Bb2 Na5

4.e3 d5 5.d3 Nf6 6.Nd2 Bf5 7.Ngf3 e6 8.Be2 Bd6 9.0–0 0–0 10.c4 h6 11.cd5 ed5 12.Nd4 Bh7 13.Nb5 Be7 14.d4 c6 15.Nc3 b5 16.Nb3 Nc4 17.Bc4 dc4 18.Nc5 Bc5 19.dc5 Qd1 20.Rfd1 b4 21.Ne2 c3 22.Bc1 Ne4 23.f3 Nc5 24.e4 f5 25.e5 Rfd8 26.Rd8 Rd8 27.a3 Ra8 28.Kf2 Nb3 29.Ra2 Nc1 30.Nc1 ba3 31.Ke3 f4 32.Kd4 Bb1 33.Ra1 c2 34.Kc5 Ra6 35.e6 a2 36.Kd6 Kf8 37.Nb3 c5 38.Kd7 c4 39.e7 Kf7 40.e8Q Kf6 41.Nc1 Ra7 42.Kd6 Ra6 43.Kd5 c3 44.Qe5 Kf7 45.Qc3 Ra7 46.Ke4 g5 47.Qc4 Kg6 48.Kd3 Rd7 49.Ke2 Rd1 50.Na2 h5 51.Qc2 Bc2 52.Rd1 Bd1 53.Kd1 g4 54.Ke2 Kf5 55.Kd3 Ke5 56.Nb4 Kf5 57.Kd4 h4 58.h3 gf3 59.gf3 Kf6 60.Ke4 Kg5 61.Nd5 Kh5 62.Kf4 Kg6 63.Kg4 Kf7 64.f4 Ke6 65.Ne3 Kf6 66.Ng2 Kg6 67.Nh4 Kh6 68.Nf3 Kg6 69.f5 Kf6 70.Kf4 Kf7 71.Ke5 Kg7 72.Ke6 Kf8 73.f6 Ke8 74.Ne5 Kf8 75.Nd7 Kg8 76.f7 Kg7 77.f8Q Kg6 78.Qf4 Kh5 79.Qg4 Kh6 80.Kf6 Kh7 81.Qg7 1–0. carocan – anman (1820), kurnik, 2012.

4.e4 Nf6 5.e5 Ne4 =.

4.g3 Nf6 5.Bg2 e6 6.d3 Be7 7.Nd2 d5 8.Ngf3 c5 9.0–0= Bd7 10.Ne5 0–0 11.c4 Bc6 12.Nc6 Nc6 13.a3 d4 14.a4 Qd7 15.e3 e5 16.Re1= Nb4 17.Qb3 Rfe8 18.ed4 ed4 19.Ne4 Ne4 20.Be4 Ra6 21.Re2 Rh6 22.Bg2 b6 23.Ba3 Bd6 24.Rae1+= Rhe6 25.Qd1 g6 26.Bc1 Bf8 27.Bf4 Re2 28.Re2 Re2 29.Qe2 Qa4 30.Be4 Qd7 31.Kg2 Qe7 32.h4 Qe6 33.Qd1 Bd6 34.Bh6 Be7 35.Qa4 Bf8 36.Qa8 Qe7 37.f3 Nc2 38.Kf2 Ne3 39.Be3 de3 40.Ke3 f5–/+ 41.Qb7 fe4 42.Qe7 Be7–+ 43.de4 Kf7 44.f4 Ke6 45.Kf3 Kd6 46.Ke3 Kc6 47.e5 b5 48.Kd3 (48...b4 49.Kc2–+; 48.cb5 Kb5 49.h5 gh5–+). coloplayah (2070) – alexp (2235), net–chess.com, 2006.

3.Bb2 e5

4.e3 Nf6 5.Nf3 Ra5 6.Be2 e4 7.Nd4 Nd4 8.Bd4 Rg5 9.0–0 d5 10.f4 ef3 11.Bf3 Bd6 12.Nc3 Ng4 13.Bg4 (13.Nd5? Bh2 14.Kh1 A) 14...Rd5?! 15.Bg4 Be5 16.Bc8 Bd4 17.Qf3+= (worse is 17.Bb7 Qh4 18.Kg1 Be3 19.de3 Rd1 20.Rad1 0–0+=); B) 14...Bg3–+) 13...Bg4 14.Qb1 0–0 15.Nb5 (worse is 15.Qb7 c5–/+) 15...Be7 16.Qb2 c6 17.Na7 Qb8 18.Rab1 Bd6 19.Nc6?? (19.h4 Bh2 20.Kh1–+) 19...Bh2–+ (19...bc6?! 20.Qb8 Rb8 21.Rb8 Bb8 22.a4–+) 20.Kh1 Qg3 (20...bc6 21.Qb8 Bb8–+ (worse is 21...Rb8 22.Kh2 Rc8 23.Bc5+=)) 21.Ne7–/+ Kh8 22.Qb4 Rg8 (22...Rg8 23.Bg7 R8g7–+) 0–1. Poulsen,Rene (2080) – Deschamp,Guy (2305), IECG, 2004.

4.Nf3 Ra5 5.e3 =.

2.ba5 d5

3.Bb2 Ra5 (--> 2.ba5 Ra5 3.Bb2 d5).

3.Bb2 c5 4.Nf3 Qa5 5.Bc3 Qc7 6.e3 Nc6 7.Bb5 e6 8.0–0 Bd7 9.d4 c4 10.Ne5 Ne5 11.de5 Bb5 12.Nd2 Ne7 13.e4 Bc6 14.Rb1 Ng6 15.ed5 Bd5 16.Re1 Bc5 17.Ne4 Be4 18.Re4 0–0 19.h4 h6 20.h5 Ne7 21.Qg4 Ra2 22.Bd4 Bd4 23.Rd4 Rc2 24.Rbd1 Nd5 25.Qe4 Rc3 26.f4 Rg3 27.f5 Nc3 28.Rd7 Qd7 29.Rd7 Ne4 0–1. orangotango – Howie (2030), 2003.

3.Bb2 Nf6 4.e3 c5 5.c4 Nc6 6.Nf3 Bg4 (6...d4 7.ed4 cd4 8.Bd3+=) 7.Be2 e6 8.0–0 (8.a6 Ra6 9.cd5 Bf3 10.gf3 Rb6 11.Bf6 Qf6+/–) 8...Bd6 9.cd5 ed5 10.d4 (10.Bf6!? Qf6 11.Nc3=) 10...c4+= (worse is 10...Ra5 11.dc5 Bc5 12.Nbd2+=) 11.h3 Bh5 12.Nfd2 (12.Ne5 Be2 13.Qe2 Ra5 14.Nc6 bc6=) 12...Be2–/+ 13.Qe2 0–0 14.e4 de4 (worse is 14...Ra5 15.e5+=; worse is 14...Na5 15.e5+/–) 15.Ne4 (15.Nc4 Na5 16.Nd6 Qd6=) 15...Re8 (15...Ne4!? 16.Qe4 Re8+=) 16.Nf6= Qf6 The isolani on d4 becomes a target. Black is in command 17.Qc4 Qf4 Threatening mate... how? 18.g3 Qf5 19.Kh2 Ra5 20.Nc3= Qc2 21.Qb3 Nd4 22.Qc2 Nc2 23.Rac1 Nb4 24.a3 Nd3–/+ 25.Rc2 Nb2 26.Rb2+= Ba3 27.Rb7= Bc5 28.Rb5 Rb5+= 29.Nb5 h5 30.h4 Re2–/+ 31.Kg2 Kh7 32.Nc3= Rc2 33.Ne4 Be7 34.Rd1 Kg6 35.Rd2 Rc4 36.Kf3 f6 37.Nd6 Rc3 38.Ke2 Ra3 39.Nc4 Ra4 40.Ne3 Bb4 41.Rd4 Ra2 42.Kf3 Bc5 43.Re4 Kf7 44.Rc4 Ba7 45.Rc7 Kg6 46.Re7 Ra3 47.Ke2 Be3 48.Re3 Re3 49.Ke3 Kf5 50.f3 g5 51.Kd3?? gh4–+ 52.gh4 Kf4 53.Ke2 Kg3 54.Ke3 Kh4 55.Kf4 Kh3 56.Kf5 h4 57.Kf6 Kg3 58.Kg5 h3 59.f4 h2 60.f5 h1Q 61.f6 Qh8 62.Kg6 Qf8 63.Kf5 Kf3 64.Ke5 Kg4 65.Ke6 Kf4 66.Kd5 Kf5 67.Kd4 Qf6 68.Kc4 Qd6 69.Kc3 Qc5 70.Kd3 Kf4 71.Kd2 Qc4 72.Kd1 Qa2 73.Kc1 Ke3 74.Kd1 ½–½. carocan (1705) – rox76 (1810), kurnik, 2011.

3.e3 c5 4.Bb2 Nc6 5.Nf3 f6 6.Be2 Qa5 7.0–0 e5 8.d3 Bd6 9.Nbd2 Be6 10.Qc1 Nge7 11.c4 d4 12.ed4 Nd4 13.Nd4 ed4 14.Re1 0–0 15.Bf3 Bc8 16.Ne4 Qc7 17.Nd6 Qd6 18.a4 Ng6 19.g3 Ne5 20.Be2 Qc6 21.Qf4 Bh3 22.Qh4 Qg2 0–1. exp2005 – johamanek, kurnik, 2012.

3.Nf3 Ra5 4.e3 g6 5.Be2 Bg7 6.d4 Nh6 7.c4 dc4 8.Bc4 Rc5 9.Qc2 Ra5 10.Bd2 Ra7 11.Nc3 c6 12.0–0 0–0 13.Ne4 b6 14.Rac1 Rb7 15.Bc3 Nf5 16.Bb2 Qe8 17.a4 Nd6 18.Bd3 Bh6 19.Ne5 Bf5 20.Nd6 ed6 21.Bf5 de5 22.Be4 ed4 23.Bd4 Qe6 24.Ba1 (< 24.Bc6 Rc7 25.Bd5 Rc2 26.Be6 Rc1 27.Rc1 fe6 28.Bb6 Nd7=+) 24...Rc8 25.Qb2 f6 26.Qf6 Qe4?? (Better is 26...Qf6 27.Bf6 Bg7 28.Bg7 Kg7+/–) 27.Qh8+– Kf7 28.Qh7 Bg7 (28...Ke6 29.Qb7 Re8+–) 29.Qg7 Ke8 30.Qb7 Qg4 31.Rfd1 Kf8 32.Bf6 Qe6 33.Rd6! Qd7 34.Rd7 Nd7 35.Qd7 Rc7 36.Qc7 c5 37.Qe7 Kg8 38.Qg7# 1–0. GLChess211 – Holmes040, computer chess game, 2000.

2.ba5 e5

3.a6 Na6 4.e4 Nf6 5.Ba6 Ra6 6.Bb2 Ne4 7.Be5?? (7.Qe2 Nf6 8.Be5–+) 7...Re6–+ 8.d3 Nf6 (8...Re5?! 9.de4 d5 10.Ne2–+) 9.d4 (9.f4 d6 10.Nf3 de5 11.fe5 Nd5–+) 9…d6 0–1. smoothoperator – pcmvr, net–chess.com, 2018.

3.Bb2 Ra5 (--> 2.ba5 Ra5 3.Bb2 e5).

3.Bb2 d6 4.e3 Nc6 (4...Nf6 5.Nf3=) 5.Bb5 (5.d4 ed4 6.ed4 d5=) 5...Bd7 (5...Ra5 6.Nc3=) 6.Qf3 (6.Nc3 Nf6=) 6...Ra5=+ 7.a4 Nf6 (7...Nb4 8.Bd7 Qd7 9.Na3=+) 8.Qe2 (8.Bc3 Ra7=+) 8...Be7 (8...Nb4 9.d4–/+) 9.Bc3 Ra7 (9...Ra8 10.Nf3–/+) 10.a5 (10.Nf3 e4 11.Nd4 Ne5=+) 10...0–0 11.a6 (11.Nf3 Ne4=+) 11...ba6 (11...Qa8 12.f4–/+) 12.Ra6 Ra6 (12...Qa8 13.Bc6 Bc6 14.Ra7 Qa7 15.Nf3–+) 13.Ba6 Qb8 14.Qd1 Bg4 (14...Qb6!? 15.Bc4 Rb8–/+) 15.Be2=+ Be6 16.Nf3 Nd5 17.Ba1 e4 18.Nd4 Nd4 19.ed4 (19.Bd4!? c5 20.Ba1=+) 19...Qb6 (19...Qa7 20.Nc3 Qd4 21.Nb5–/+) 20.c4 (20.Nc3 Qd4 21.0–0–/+) 20...Nf6 (better is 20...Nf4!? 21.0–0 Bf6–+ (< 21...Ne2 22.Qe2 d5 23.cd5 Bd5 24.Nc3 Qd4 25.d3=+)) 21.d5=+ Bf5 22.Nc3 Rb8 23.Nb5 Bd7=+ 24.Bd4 Qb7 25.Nc3= c5 26.Bf6 Bf6 27.Ne4 Be5 28.0–0 f5 29.Ng3 Bd4 30.Bd3+= g6 31.Ne2 Bf6 32.Bc2 Kg7 33.d4+= cd4 34.Nd4 Qc7= 35.g3 Qc4–/+ 36.Ne6 ½–½. 73DADDELDU37 – bopl, mySchach.de, 2005.

3.Nc3 d5 4.d4 Bb4 5.Bb2 Nf6 (5...e4 6.e3–/+) 6.f3 (better 6.de5 Ne4 7.Qd3=+) 6...ed4–+ 7.Qd4 Nc6 8.Qd3? (better 8.Qh4–+) 8...d4 (8...Ra5?! 9.a3 Bc5 10.e4–/+; 8...Na5?! 9.0–0–0 Nc4 10.e4 Nb2 11.Kb2–/+; 8...Ba5?! 9.e3–/+) 9.a3 Ba5 10.Kd1 (10.e4 dc3 (worse 10...Bc3 11.Bc3 dc3 12.Qd8 Kd8 13.Ne2–+) 11.Qd8 Nd8–+) 10...dc3 11.Qd8 Kd8 12.Kc1 (12.Bc1–+) 12...cb2 13.Kb2 Nd5 14.e4 (14.Rd1 Bc3 15.Kb3 Nd4 16.Rd4 Bd4–+) 14...Bc3 15.Kb3 (15.Kb1 Ba1 16.Ka1 Ne3–+) 15...Ba1 16.ed5 Nd4 17.Ka2 Nc2 18.Kb1 (18.a4 Be5 19.Kb3 Na1 20.Kb4 Bd6 21.Kc3 Ra4–+) 18...Na3 19.Ka1 Nc4 20.Kb1 Bf5 21.Kc1 (21.Bd3 Bd3 22.Kc1 Ra1) 21...Ra1 0–1. valerypavlovich (2210) – pcmvr, net–chess.com, 2016.

3.d3 Bb4 4.Bd2 Ba5 5.Nc3 (5.Nf3 d6=+) 5...Nc6 6.g3 Nf6 7.Bg2 d5 8.Nh3 h6 9.0–0 0–0 10.f3 (10.e3!?–/+) 10...d4–+ 11.Ne4 Nd5 12.c4 (better 12.f4–+) 12...dc3 13.Bc1 Nd4 14.Ba3 (14.Rf2 f5 15.e3–+) 14...c2 (14...c2 15.Qc1 Ne2 16.Kh1 Nc1 17.Rfc1 Re8 18.Rc2 Ne3–+) 0–1. sbeaul (2470) – pcmvr, net–chess.com, 2016.

3.d3 Nc6 4.Bd2 d5 5.e4 Nf6 6.Nf3 de4 7.de4 Ne4 8.Bb5 Bd6 9.Nc3 Nd2 10.Qd2 0–0 11.Ne4 Bb4 12.c3 Ba5 13.Qd8 Rd8 14.0–0 (14.Bc6!? bc6 15.Rc1–/+) 14...f5–+ 15.Neg5 e4 16.Bc4 (16.Rad1 Rf8 (16...ef3?! 17.Bc6 Rd1 18.Rd1–/+) 17.Nd4 Ne5–/+ (17...Bc3?! 18.Bc4 Kh8 19.Nc6=)) 16...Kf8 17.Nh7 Ke7 18.Nfg5 Ne5 19.Bb3 b5 20.g3? (20.Rac1 c5 21.c4 bc4 22.Bc4 Bd2–+) 20...c5 (better 20...Bc3 21.Rac1 b4–+) 21.Nf7?? (21.f4 Ng4 22.Rfc1–+) 21...Nf7 22.c4 bc4 23.Bc4 Ne5 24.Bb3 (24.Rfc1 Nf3 25.Kg2 Rh8–+) 24...Nf3 25.Kg2 Rh8 26.Bd5 Rh7 27.Rh1 Rb8 0–1. croach (2265) – pcmvr, net–chess.com, 2016.

3.d4 ed4=+ 4.Qd4 Be7 5.Qg7?? (better 5.Nc3 Nf6 6.e4=+) 5...Bf6–+ 6.Qg3 (6.Bg5 Bg7 7.Bd8 Kd8 8.c3–+) 6...Ba1 7.e3 (7.e4 Ra5 8.Bd2 Ra8–+) 7...Nc6 8.Bd2 Nf6 9.f3 (9.Qf3 Qe7–+) 9...Rg8 10.Qf2 Na5 11.Bd3 (11.Bc3 Bc3 12.Nc3 Nc6–+) 11...d5 12.c3 (12.Bc3 Bc3 13.Nc3 c5–+) 12...Nc4 13.Bc4 dc4 14.Ne2 Bh3! 15.gh3 (15.Nf4 Rg2! 16.Ng2 Qd3–+) 15...Qd3 16.Na3 (16.Qf1 Qb1 17.Kf2 Qa2–+) 16...Ra3 17.Nf4 (17.Nc1 Qb1 18.Qe2 Bc3 19.Kf2 Bd2 20.Qd2 Ne4 21.fe4 Qe4 22.Ke2 Qh1 23.Qe1–+) 17...Qb1 18.Ke2 Qh1 19.e4 Bc3 20.Qc5 Nd7 21.Qc7 (21.Qd5 Qh2 22.Kd1 Rg1 23.Kc2 Bd2 24.Qd2 Ra2 25.Kc3 Qd2 26.Kc4 Ne5 27.Kc5 Ra5) 21...Rg2! 22.Ng2 (22.Ng2 Qg2 Mate attack) 22...Qg2 23.Kd1 (23.Ke1 Qd2 24.Kf1 Qe1 25.Kg2 Ra2) 23...Qd2 0–1. rimazu – pcmvr, net–chess.com, 2018.

3.e4 Nc6 4.Nf3 Nf6 5.Bb5 (5.Nc3 Bc5 6.Bb5 Ra5=+) 5...Ne4 (5...Ra5 6.Bc6 dc6 7.d3–/+) 6.Bc6 dc6 7.Qe2 Ng5 8.Ne5 Ne6 9.c3 (better 9.0–0!?=+) 9...Qd5–+ 10.Nf3 Bd6 11.d4 0–0 12.0–0 Ra5 13.Rd1 Qh5 14.Re1 c5 15.g3 (15.dc5 Nc5 16.Ba3 Bg4–+) 15...b6 16.Nbd2 Ba6 17.Qe4 cd4 18.cd4 Rb8 19.Qe3 (19.Re3 Bb7 20.Qh4 Qh4 21.gh4 Bf4–+) 19...Bb7 20.Ne4 Bb4 21.Re2 Re8 22.Bd2?? (22.Qb3–+) 22...Ra3 23.Bb4 (23.Bc3 f5 24.Nfg5 fe4 25.Ne6 Re6 26.Bb4 Re3 27.Re3 Qh3–+) 23…Re3 (23...Re3 24.Re3 Be4 25.Re4 Qf3–+) 0–1. mgilbert – pcmvr, net–chess.com, 2019.

3.Nf3 e4 4.Nd4 d5 5.e3 c5 6.Bb5 Bd7 7.Bd7 Nd7 8.Nb3 Ngf6 9.Bb2 c4 10.Nd4 Qa5 11.Bc3 Qc7 12.Nb5 Qb6 13.a4 Bc5 14.0–0 0–0 15.Bd4 Bd4 16.ed4 Ra5 17.N1c3 Qc6 18.Re1 Nb6 19.Qb1 Rfa8 20.Qb4 h6 21.Re3 Nh7 22.Nd6 Ng5 23.Ree1 Ne6 24.Nf5 Kh7 25.Ne7 Qc7 26.Reb1 R8a6 27.Nf5 Qf4 28.Ne3 Nd4 29.Qe7 Qg5 30.Qb7 Na4 31.Ncd5 Ra7 32.Qb4 Nc2 33.Nc2 Qd5 34.Ne3 Qe6 35.Rc1 Qf6 36.Nc4 R5a6 37.Re1 Qd4 38.Reb1 Nc5 39.Ra6 Ra6 40.Qc3 Qd3 41.Re1 Ra2 42.Qb4 Qe2 43.Rf1 Qf1 44.Kf1 Ra1 45.Ke2 Nd3 46.Qc3 Re1 0–1. color1972 – PassedPawn, ChessWorld.net, 2005.

3.Bb2 Nc6

4.c3 d5–/+ 5.d3 (5.e3 Ra5 6.c4 Bf5–/+) 5...Nf6 6.Nf3 (6.e3 Bd6–/+) 6...Bd6 7.e3 0–0 8.Ba3 Ra5 9.Bd6 Qd6 10.Be2 e4 (better 10...Be6–/+) 11.0–0?? (better 11.de4 Ne4 12.0–0=+) 11...ef3–+ 12.Bf3 Ne5 13.d4 (13.Nd2 Bf5 (13...Nd3?! 14.Nb3 Nb2 15.Qe2–+) 14.Nb3 Ra3–+) 13...Nf3 14.Qf3 Re8 (14...Bg4 15.Qg3 Qg3 16.hg3–+) 15.Rc1 Bg4 16.Qg3 Qg3 17.hg3 (17.fg3?? Re3 18.h3 Bd7–+) 17...b5 18.Nd2 (18.Rc2 Bf5 19.Rb2 Bd3–+) 18...Bf5 19.a3 (19.Nb3 Ra3–+) 19...Rea8 20.Re1 (20.f3 Ra3 21.Ra3 Ra3–+) 20...Ra3 21.Ra3 Ra3 22.Rc1 Ra2 (22...Ra2 23.Nb3 Ne4–+) 0–1. fishmooney – pcmvr, net–chess.com, 2017.

4.d4 ed4=+ 5.Nf3 Bb4 6.c3 dc3–/+ 7.Bc3 Ra5 8.Bb4 Nb4 9.Qb3 Qf6 10.Nc3 Nd5 11.Ne4?? Qa1–+ 12.Kd2 Ra2 13.Kd3 Ra3 14.Qa3 Qa3 15.Kd4 Nge7 16.Ned2 Qc3 17.Ke4 f5# 0–1. michas – pcmvr, internet, 2005.

4.e3 Ra5 5.Nf3 Nf6 6.Be2 e4 7.Nd4 Rg5 8.0–0 Nd4 9.Bd4 d5 10.g3 (10.f4 ef3 11.Rf3 Be7=+) 10...h5 (10...Bh3 11.Re1 Bb4 12.c3=+) 11.h4= Rg6 12.c4 Qd6 (12...Bh3 13.Re1 Qd6 14.Qa4 b5 15.Qa8 Ke7+–) 13.Kg2 (13.Qa4!? Kd8 14.Kg2=+) 13...Qd7 (13...dc4 14.Bc4 Be7 15.Nc3–/+) 14.Rh1 dc4 15.Nc3 b5 (15...Qc6 16.Rb1=+) 16.Qc2 (16.Bf6 gf6 17.Qb1 c6 (17...Qd2?? 18.Rd1 Qd6 19.Rd6 Bd6 20.Qb5 Kf8 21.Ne4+–) 18.Qe4 Be7=) 16...Ng4 (16...Be7 17.Rab1 (17.Ne4?? Ne4 18.Qe4 c5 19.Bg7 Rg7–+) 17...b4 18.Bf6 (18.Ne4 Ne4 19.Qe4 c5 20.Bg7 Rg8–+) 18...gf6 19.Ne4–/+) 17.Ne4=+ (worse 17.Qe4 Re6 18.Qa8 c5 19.Nb5 cd4 20.Nd4 Rb6–+) 17...Bb7 18.f3 Ba3 (18...Nf6 19.Bf6 gf6 20.Rab1=+) 19.Qc3 (19.Rhb1 0–0 20.fg4 c5 21.gh5 Re6–/+) 19...Be7= 20.Nc5 (20.a4 Be4 21.fe4 c5 22.ab5 0–0 23.Bc4 cd4 24.ed4 Qb7–/+) 20...Qd6=+ 21.Rh3 (21.Nb7?? Ne3 22.Be3 Qg3 23.Kf1 Qg2 24.Ke1 Qh1 25.Bf1 0–0–+) 21...Bc8 22.fg4 hg4 23.Rh2 Rh5 24.e4 Rc5 25.Bc5 (25.Bg7? Bb7 26.Kg1 f6–+) 25...Qc5 26.d4 Qa3 27.Qa3 Ba3 28.Rb1 Bd7 29.Kf2 (29.Rhh1 Ke7=) 29...c5 30.d5 c3 31.Bd1 (31.Bb5 c2 32.Rhh1 cb1R 33.Bd7 Kd7 34.Rb1 Rf6 35.Ke2 c4–+) 31...c4 32.Ke1 (32.e5 Bc5 33.Ke1 b4=+) 32...Ra6=+ 33.Re2 Ke7 34.e5 b4 35.Bc2? (35.d6 Kd8 36.h5–/+) 35...Bb2–+ 36.e6 fe6 37.Re4 (37.d6 Rd6 38.Re4 Rc6–+) 37...Ba4–+ 38.Kd1?? (better 38.Ba4 Ra4 39.Ke2–+) 38...b3 39.ab3 cb3 40.Rb2 bc2 (40...cb2 41.Bb1 Ra5 42.Kd2=+) 41.Rc2 Bb3 (41...Bc2?! 42.Kc2 Ra2 43.Kc3 Ra3 44.Kd4 Rg3 45.Re6 Kf7 46.h5=) 42.Re3 Ra2 (better 42...Ra1 43.Ke2 Bc2 44.Rc3 Bd1 45.Ke3 ed5–+) 43.Rec3 Bc2 (43...Bc2 44.Rc2 Rc2 45.Kc2 e5–+; 43...Rc2?! 44.Rb3 Rc4 45.de6 Ke6 46.Kd2=) 0–1. marekt (2170) – bla_ner (1975), gameknot.com, 2015.

4.e3 Bb4 5.Bc4 d5 (5...Ra5 6.a3 Be7 7.Bc3=) 6.Bb3 (6.Bb5!?=) 6...f6 7.Qf3 Nge7 8.Nc3 d5 becomes the focus of attention 8...h5 (8...Na5 9.Qh5 g6 10.Qh4 Nb3 11.ab3 Ra1 12.Ba1–/+) 9.h3 (9.Nd5!? Bg4 10.Qe4+=) 9...e4 10.Qe2 Ra5 11.f3 f5 12.a3 Bc5 (12...Bd6!?=) 13.Na4+= d4 (better is 13...Bd6 14.Bg7 Rh7+=) 14.f4?? (14.Nc5 Rc5 15.fe4 fe4 16.ed4 Nd4 17.Qe4 Nb3 18.cb3 Rg5+=) 14...b6 (14...Ba7 15.ed4 Nd4 16.Bd4 Qd4 17.Nc3–/+) 15.g4 (15.Nc5!? Rc5 16.Qf2+=) 15...hg4 (15...Bd6 16.Qc4 Rf8 17.Nb6 cb6 18.Bd4–+) 16.Qc4 Rf8 (16...de3 17.Qf7 Kd7 18.Nc5 bc5 19.de3+–) 17.Qf1 (better is 17.Nc5!? Rc5 18.Qf1+=) 17...de3–+ 18.Rd1 ed2 (better is 18...Ba6 19.Ne2 Nd4 20.Bd4 Be2 (worse is 20...Bd4 21.de3 Be2 22.Ke2+/–) 21.Qe2 Qd4 (worse is 21...Bd4 22.de3 Nc6 23.ed4+=) 22.Nc5 ed2 (22...bc5?! 23.de3 Qc3 24.Kf2–/+; 22...Rc5?! 23.de3 Qc3 24.Qd2–/+) 23.Qd2 Qd2 24.Rd2 bc5 25.hg4 Ra3–+) 19.Rd2= Bd6 20.Bg7 e3 21.Rd3 Ba6 (21...Ba6 22.Bf8 Bd3 23.Qd3 Kf8 24.hg4 Ng6=). Le Duigou,Goulven (1640) – Pouzerate,Thibaut (1890), Hennebont Grand Prix, 2006.

4.e3 Nf6 5.a6 b6 6.Nf3 Bb4 7.Ne5+= Ne5 8.Be5 c6 9.a3 Be7 10.Nc3 0–0 11.Rb1 (11.Bd3 Ba6 12.0–0 d6 13.Ba6 Ra6+=) 11...d5 (11...Ba6 12.Ba6 Ra6 13.a4+–) 12.a4 (12.Bd4 Bc5 13.Bf6 Qf6+–) 12...Nd7 13.Bg3 Ba3 (13...Nc5 14.d4 Na6 15.Bd3+=) 14.Rb3 Qe7 15.Qf3 Ra7 (15...Bc5 16.Bd3+=) 16.Qf4 Bc5 (worse 16...Ba6 17.Ba6 Ra6 18.Qc7+–) 17.Bd3 f5 18.Qh4 (18.0–0 Qe6+–) 18...g5 (18...Ba6 19.Ba6 Qh4 20.Bh4 Ra6 21.d4+=) 19.Qh6 f4 20.Qc6 Nf6 21.Nd5 Nd5 22.Qd5 Be6 23.Qe5 Bb3 24.Qe7 Re7 25.cb3 fg3 26.hg3 Rd8 27.Ke2 Kh8 28.Bb5 Bb4 (28...Kg7 29.Rc1+–) 29.d3 Rc8 (29...Kg7 30.Rc1+–) 30.Bc4 Kg7 31.d4 h6 32.g4 Rd8 33.Kd3 1–0. marekt (2135) – tallx (1900), gameknot.com, 2015.

4.e3 Nf6 5.a6 b6 6.Nf3 Bd6!? +=.

4.e3 Nf6 5.a6 b6 6.Nf3 e4 7.Nd4 Nd4 (7...Bc5 8.Nc6 dc6 9.Bf6 Qf6 10.Nc3=) 8.Bd4= Bc5 9.Bf6 Qf6 10.Nc3 Qg6 11.f3 f5 12.fe4 fe4 13.Bc4 Rf8 14.Rf1 (14.Nd5 Kd8 15.Nf4 Qh6=+) 14...c6=+ 15.Rf8 Bf8 16.Kf2 (16.g3 d5 17.Be2 Qh6–/+) 16...b5=+ 17.Be2 Qf5 (17...Ba6?? 18.Bh5 Be7 19.Bg6 hg6 20.Qg4+–; 17...Ra6?? 18.Bh5 d5 19.a4+–) 18.Kg1 b4 19.Na4 Ba6 20.c4 Qe5 21.Rc1 Kd8 22.Qb3 (22.Bg4 Kc7=+) 22...h5–/+ 23.Bf1 (23.Bd1 Bd6 24.g3 c5–/+) 23...c5 (23...Kc7 24.Rb1 Qa5 25.Be2–/+) 24.Nb6 Bd6 25.g3 (25.Na8 Qh2 26.Kf2 Qh4 27.Ke2 Qg4 28.Kf2 Bg3 29.Kg1 Bb7 30.Be2 Qh4 31.Bh5 Qh2 32.Kf1 Qh1 33.Ke2 Qc1 34.Qd1 Qc4 35.d3 Qa2 36.Qd2 ed3 37.Kd3 Ba6 38.Ke4 Qd2 39.Kf3 Qf2 40.Ke4 d5 41.Kd5 Qf5 42.Kc6 Qe6 43.Kc5 Qd6) 25...Ra7 26.a3 (better 26.Nd5!? h4 27.Bg2–/+) 26...h4–+ 27.ab4 hg3 28.bc5 (28.hg3 Qg3 29.Bg2 Qh2 (29...cb4?! 30.Nd5–/+) 30.Kf1 Bg3 31.bc5 d6–+) 28...Qc5 (28...gh2!? 29.Kh1 Bc5–/+) 29.Nd5–/+ Bb7 30.Qb1 gh2 31.Kh1 Bd5 (31...Qa5!? 32.c5 Bc5 33.Qe4=) 32.cd5–/+ Rb7! 33.Qa1 (33.Qb7 Qb4 Double attack (33...Qc1 Deflection; 33...Qb4 Decoy)) 33…Qa3 (worse 33...Qd5 34.Qg7 Qf5 35.Qh8 Qf8 36.Qh4 Qe7 37.Qh8 Qf8 38.Qh4 Qe7 39.Qh8 Qf8=) 0–1. marekt (2130) – pvanr (2245), gameknot.com, 2015.

4.e3 Nf6 5.Nf3 Ra5 6.d3 Bb4 7.c3 Be7 8.Nbd2 d5 9.Be2 0–0 10.0–0 Ba3 11.Ba3 Ra3 12.Qc1 Qe7 Black plans e4 13.d4 e4 14.Nb3?? (better is 14.Ne5+=) 14...Bg4–+ 15.Ne5 (15.Nc5 Ra7–+ (15...ef3?! 16.gf3 Bh3 17.Qa3–+)) 15...Be2 16.Re1 Bb5 (16...Ne5?! 17.de5 Ng4 18.Re2 Ne5 19.Rb1–+) 17.Nc5 (17.c4 dc4 (17...Ne5?! 18.de5 Bc4 19.ef6 gf6 20.Nd4–+) 18.Nc4 Ra7–+) 17...Ne5 18.Qa3 (18.de5 Qc5 19.ef6 gf6 20.Qd1–+) 18...Nf3 19.gf3 ef3 20.e4 (20.Qb4 Ng4 21.Nd7 Qd7 22.Qa3 Nh2 23.Kh1 Qh3 24.Qf8 Kf8 25.e4 Qg2) 20...Ne4 (better is 20...Ng4!? 21.c4 (21.ed5?? Qh4 22.Nd3 Qh2 23.Kf1 Qf2) 21...Nh2 22.Ne6 (22.cb5?? Qg5 23.Kh2 Qg2; 22.Kh2?? Qh4 23.Kg1 Qg4 24.Kh2 Qg2) 22...Qa3 23.Nc5–+) 21.Qb4 (21.Qc1 Qh4 22.Re4 de4 23.Kh1 Qf2 24.Qg5–+) 21...Qg5 0–1. preethan (2135) – pcmvr, net–chess.com, 2015.

4.e3 Nf6 5.Nf3 Ra5 6.Be2 e4 7.Nd4 Rg5 (7...Be7+=) 8.Bf1 (8.0–0!?+=) 8...Be7 9.h4 Rg6 10.h5 Rg5 11.h6 gh6 12.Rh6 Nd4 13.Bd4 d5 14.g3 (14.Nc3 0–0 15.Na4 b6–/+) 14...Ng4 15.Bh8 Nh6 16.Bc3 (16.Bb2 Bg4 17.Qc1 Rh5–+) 16...Ng4–+ 17.Bg2?? (better is 17.Qe2–+) 17...Nf2 18.Qe2 Nh3 19.Bh3 Bh3 20.Qh2 (20.Qb5 Kf8 21.d3 d4 22.Qb7 de3 23.Qe4 Rg3–+) 20...Qd7 21.d3 (21.d4 Bd6 22.Kd1 Rg3 23.Kc1–+) 21...Bd6 22.Kd1 (22.Kd2 Rg3 23.de4 Rg2 24.Qg2 Bg2–+) 22...Rg3 23.Kc1 (23.de4 Rg2 24.Qg2 Bg2 25.ed5 Bd5–+) 23...Rg2 24.Qh1 ed3 25.cd3 Qa4 26.Qg2 Bg2 (26...Bg2 27.Bh8 Qb5–+) 0–1. decu40 (1935) – pman3660 (2255), gameknot.com, 2015.

4.e4 Ra5 5.Nf3 Nf6 6.Nc3 Bc5 7.Be2 0–0 8.0–0 d6 9.d3 Nd4 10.Nd4 Bd4 11.Kh1 Be6 12.Qd2 b6 0–1. justforfun (2510) – pcmvr, net–chess.com, 2015.

4.e4 Ra5 5.Nf3 Nf6 6.Nc3 Bc5 7.h3 0–0 8.Be2 (8.Bc4!?–/+) 8...d5 9.ed5 Nd5 10.Ne4 Bf5 11.Nc5 Rc5 12.d3 Ncb4 13.c4 Nf4 14.0–0 Re8 (better is 14...Qe7–+) 15.d4?? (better is 15.Ba3 Ne2 16.Qe2 Bd3 17.Qd2 Bf1 18.Bb4 Bg2 19.Rd1–+) 15...ed4–+ 16.Nd4 (16.Re1 Nc2 (16...Ne2?! 17.Re2 d3 18.Re8 Qe8 19.Rc1–/+; 16...Re2?! 17.Re2 Ne2 18.Qe2–+) 17.Qd2 Na1 (17...Re2?! 18.Re2 Ne2 19.Qe2 Na1 20.Bd4–+; 17...Ne2?! 18.Re2 Re2 19.Qe2 Na1 20.Bd4–+) 18.Ba1 Ne2 19.Re2 Re2 20.Qe2 d3–+) 16...Bc2!! (16...Ne2?! 17.Ne2 Nd3 18.Qd2 Rc4 19.Rad1–+) 17.Qd2 (17.Nc2 Qd1 Double attack (17...Re2 Deflection; 17...Qd1 Decoy)) 17...Qg5 (17...Qg5 18.Qf4 Qf4–+) 0–1. mbarker (2410) – pcmvr, net–chess.com, 2015.

4.e4 Ra5 5.Nf3= Nf6 6.Bd3 Bc5 (6...Bb4 7.a3 Bc5 8.Ne5 Ne5 9.Be5 Bf2 10.Kf2 Re5 11.Nc3=+) 7.Nc3 (7.Bc3 Bb4=+) 7...Ba3 (7...d6 8.Bc4=+) 8.Rb1 (8.Ba3 Ra3 9.0–0 d6=) 8...Bb2 9.Rb2 0–0 10.0–0 b6 11.Bc4 (11.Qe2 Bb7=) 11...Bb7 (11...Ne4 12.Ne4 d5 13.Bd3 de4 14.Be4=+) 12.Re1 d6 13.d3 Ne7 (13...Bc8 14.Bb5=) 14.Qd2 (14.d4 Ng6=) 14...Ng6 15.d4 (15.Reb1 d5 16.ed5 Nd5 17.Nd5 Bd5 18.Bd5 Qd5=+) 15...Nf4 (15...ed4 16.Nd4 Re8 17.Bd3=) 16.Rb5 Qd7 (16...Rb5 17.Bb5 Qc8 18.h3= (< 18.de5 Qg4 19.Nh4 de5–/+)) 17.h3 (better is 17.Ra5!? ba5 18.h3= (< 18.de5 Qg4 19.Bf1 Ne4 20.Ne4 Be4=+)) 17...Ne4 18.Ne4 Rb5 19.de5 Be4 20.Bb5 Qf5 (20...Qb5?! 21.Re4 de5 22.Ne5=) 21.Bd7 Nh3 (21...Ne6 22.ed6 Bf3 23.gf3 Qg6 24.Kf1 cd6 25.Qd6=) 22.Kh2= Qd7 23.Re4 Qf5 24.Rh4 ½–½. Mullen,John (1660) – van Rooijen,Peter (1815), IECC, 2000.

4.Nf3 Ra5 5.e3 e4 =.

4.Nf3 Ra5 5.e4 Nf6 =+.

4.Nf3 d6 5.c4 Na5 6.e3 Nf6 7.Be2 Be7 8.Qc2 b6 9.0–0 0–0 10.d4 ed4 11.ed4 Ba6 12.Nbd2 d5 13.Rfe1 dc4 14.Nc4 Nc4 15.Bc4 Bb7 16.Ne5 Nd5 17.Qb3 Ra5 18.a4 f6 19.Nd3 Kh8 20.Rac1 Bd6 21.g3 (21.Nc5 Qa8 22.Nb7 Qb7+=) 21...Qd7 22.f4 (Better is 22.Nc5! Bc5 23.dc5=+) 22...Qa4–/+ 23.Qd1 Qd1 24.Rcd1 h6 25.Nf2 Ba6 26.Bd3 Bd3 27.Nd3 Ra2 28.Ra1 Rfa8 29.Ra2 Ra2 30.f5 Nb4 31.Nb4 Bb4 32.Rb1 Kg8 33.Bc1 Bd6 34.Rb2? (Better is 34.Be3–/+) 34...Ra1–+ 35.Rc2 Ba3 36.Kg2 (36.Rc7 Rc1 37.Rc1 Bc1 38.Kf2–+) 36...Rc1 (37.Ra2 Bb4 38.Ra8 Kh7–+; 36...Bc1?! 37.d5–+) 0–1. Frech,Josef (1610) – Bermadinger,Hermann (1910), Donau op–B 9th, 2000.

4.e4 Nf6

5.Nc3 =+.

5.d3 d5–/+ 6.ed5 Qd5 7.c4 Bb4 (7...Qa5 8.Nc3–+) 8.Bc3 (8.Nd2 Qd6–/+) 8...Qa5–+ 9.Ne2 0–0 10.Bb4 (10.Qd2 Rd8 11.Ng3 e4–+) 10...Nb4 (worse 10...Qb4 11.Nbc3–+) 11.Nec3 e4! 12.Be2 (12.Ne4 Nc2 Double attack (12...Na2 Deflection; 12...Nd3 Decoy); 12.de4 Ne4) 12...ed3 (12...Nd3?! 13.Bd3 Rd8 14.0–0 ed3 15.Re1–+) 13.Bd3 Bg4 14.f3 Nd3 (better 14...Rad8!? 15.fg4 Nd3 16.Kf1–+) 15.Qd3 Rad8 16.Qc2 Bf5 17.Qa4 (17.Qc1 Rfe8 18.Kf1–+) 17...Rfe8 18.Kf1 Bd3 19.Kf2 (19.Ne2 Be2 20.Kf2 Qc5 21.Ke1 Bc4 22.Qe8 Ne8 23.Nc3 Qe3 24.Ne2 Qe2) 19...Qc5 20.Kg3 Qe5 21.Kf2 (21.Kh3 Qf5 22.Kg3 Nh5 23.Kh4 Rd4 24.Ne4 Ree4 25.fe4 Re4 26.g4 Qg4) 21...Ng4!! 22.fg4 (22.fg4 Qe3) 22...Qe3 0–1. may – pcmvr, net–chess.com, 2018.

5.d3 d5 6.ed5 Qd5 7.Be2 Qg2 8.Bf3 Qg6 9.Bc6 bc6 10.Qf3 (10.Nf3 e4 (10...Ra5?! 11.Rg1 Qf5 12.Nbd2–/+) 11.Rg1 Bg4–+) 10...Bb4 11.c3 e4 12.Qe2? (12.de4 Bd6 13.Nd2–+) 12...Ba5 13.de4 (13.Nd2 0–0 14.de4–+) 13…Ba6 (13...Ba6 14.Qf3 Ne4–+) 0–1. tomy – pcmvr, net–chess.com, 2019.

5.d3 d5–/+ 6.ed5 Qd5 7.Nf3 Qa5 8.Nbd2 Ng4–/+.

5.Nf3 Ra5 (worse 5...Na5 6.Be5 Ne4 7.Qe2+=) 6.Nc3 Bc5=+.

3.Nc3 Nf6

4.d4 Bb4 5.Qd3 Ne4 (5...d5 6.Rb1 e4 7.Qd2–/+) 6.Bb2=+ d5 7.Nf3? (better 7.de5!? Qe7 8.e3–/+) 7...Qf6–+ 8.0–0–0?? (better 8.Ne5 Qf2 9.Kd1–+) 8...Bc3 (8...Nf2 9.Qb5 Nc6 10.Nd5 Qh6 11.Kb1 Ra5 12.Nc7 Kd7 13.Qb6 Nd1 14.d5–+) 9.Ne5 (9.Bc3 Nf2 10.Qb5 c6 11.de5–+) 9...Bb2 10.Kb2 Nf2 11.Qb5 (11.Qd2 Nh1 12.e3 Nf2 13.Bb5 c6–+) 11...Nc6 12.Kc1 Ra5 13.Qb3 Ne5 0–1. chessnaif (2415) – pcmvr, net–chess.com, 2016.

4.e4 Bb4 5.Bd3 0–0 6.Bb2 (6.Nf3 Ra5 7.Bb2 Nc6=+) 6...Ba5–/+ 7.Nf3 d6 8.0–0 Nbd7 9.Re1 Nc5 10.Nd5 (10.Qe2 Be6–/+) 10...Nd3 (10...Be6 11.Nf6 Qf6 12.a4–/+) 11.Nf6 (11.cd3 Nd5 12.ed5 Bf5–/+) 11...Qf6 12.cd3 Bg4 13.h3 Bf3 14.Qf3 Qf3 15.gf3 Bd2 16.Re2 Bb4 17.Rc2 c5 18.a3 Ba5 19.Kg2 f5 20.Rb1 Bd8 21.Be5? (better 21.Bc1 b6 22.Rc4–/+) 21...de5 22.Rc5 fe4 23.fe4 Ra3 (23...Bh4 24.Rb2–+) 24.Rb7 (24.Re5 Ra2 25.Rf5 Rf5 26.ef5 b6–+) 24...Ra2 25.Re5 (25.Rb8 Raf2 (worse 25...Rff2 26.Kg1 Rf8 27.Re5–+) 26.Kg1 Rd2–+) 25...Bh4 26.Rf5 (26.Rb1 Rff2 (worse 26...Bf2 27.Rf5 Bc5 28.Kg3 Rf5 29.ef5–+; worse 26...Raf2 27.Kg1–+) 27.Kg1 h6–+) 26...Rf5 27.ef5 Rf2 28.Kg1 Rf5 29.Rd7 (29.Rb4 Be7 30.Rb8 Kf7–+) 29...Rf8 30.Rb7 (30.Kh1 Rd8 31.Rd8 Bd8–+) 30…Rf3 0–1. nizef (1855) – pvanr (2245), gameknot.com, 2015.

3.c4 Nf6

4.Bb2 Nc6 5.Nc3 Bc5 6.g3 0–0 7.Bg2 d6 8.h3 (8.d3 Bb4–/+) 8...Na5 9.d3 h6 10.Nf3 e4! 11.Ne4 (11.Ne4 d5 Double attack (11...d5 Decoy); 11.de4 Nc4 Deflection) 11...Ne4 12.de4 Bb4 13.Kf1 Nc4 14.Bc1 (14.Qd4!? Nb2 15.Qb4–/+) 14...Bc5 15.e3 (15.Bf4 Be6–+) 15...Qf6 16.Nd4 Bd7 17.Kg1 b5 18.Kh2 (18.a3 Rfd8–+ (18...Na3?! 19.e5 Qe5 20.Ba8 Ra8 21.Ba3 Ra3 22.Ra3 Ba3 23.Qf3–+)) 18...Qf2 19.Nf5 (19.Qf3 Qf3 20.Bf3 Bb4–+) 19...Ra2 (19...Ne3?! 20.Ne3 Ra2 21.Ra2 Qa2 22.Nf5=; 19...Be3? 20.Rf1 Ra2 21.Rf2 Ra1 22.Ne3 Ne3 23.Qb3 Rc1 24.Qe3+–) 20.Ra2 Qa2 21.Qg4 Bf5 22.ef5 Ne5 (22...Ne3?! 23.Be3 Be3 24.f6–+) 23.Qd1 b4 24.Re1 b3 25.Re2 Qa1 0–1. mgilbert – pcmvr, net–chess.com, 2019.

4.d3 d5 5.cd5 Qd5 (5...Nd5 6.Nf3 Nc6 7.a6 Ra6 8.e4–/+) 6.Bd2 Nc6 7.Nf3 (7.Nc3 Qd7=+) 7...Bb4 8.g3 (8.Bb4 Nb4 9.Qa4 Nc6–/+) 8...e4 (8...0–0 9.Bg2=+) 9.de4=+ Ne4 10.Bg2 Nd2 11.Nbd2 Ra5 12.0–0 (12.Qc2 Be6–/+) 12...Ra2 13.e4 (13.Ra2 Qa2 14.Nb3 0–0–/+) 13...Qe6 14.Qe2 0–0 15.Ra2 (15.Qe3 Rc2–/+) 15...Qa2–+ 16.Qe3 Rd8 17.Nb3 Bd6 (17...Qc2 18.Nbd4 Nd4 19.Nd4–+) 18.h3 (18.Nfd4 Nd4 19.Nd4 Bb4–/+) 18...Bf8 (18...Qb2 19.Nc5–+) 19.Ra1 (19.Rc1 Qa3 20.Ra1 Qd6–/+) 19...Qb2 (19...Qc2 20.Bf1–/+) 20.Ra8 b5 (20...Qb1 21.Kh2–/+) 21.Kh2 (21.e5 b4–/+) 21...Be6 22.Rd8 Nd8 23.Nfd2 (23.Nc5 Qc2 24.Ne6 Ne6–+ (worse 24...fe6 25.Qg5 Qd3 26.Ne5–/+)) 23...c5!–+ 0–1. mgilbert – pcmvr, net–chess.com, 2017.

4.Nf3 Nc6 5.d3 d5 6.cd5 Qd5 7.Nc3 Qa5 8.Bd2 Bb4 9.Rc1 0–0 10.g3 Rd8 11.Qc2 (11.Bg2!?–/+) 11...Bf5 12.Bg2 (12.Qb1 Bg4 13.Ng5 Nd5–+) 12...e4! 13.de4 (13.Ne4 Bd2 Double attack (13...Qa2 Deflection); 13.de4 Ne4) 13...Ne4! 14.Ne4 Be4 15.Qb2 (15.Bb4 Nb4 16.Qe4 Na2 17.Kf1 Nc1 18.Bh3–+) 15...Rd2! (15...Rd2 16.Nd2 Bg2–+) 0–1. mgilbert (2100) – pcmvr, net–chess.com, 2016.

3.e4 Nf6

4.Bb2 Ne4 5.Nf3 (5.Qe2!? d5 6.f3=+) 5...Bc5 6.d4 (6.Qe2 d5 (6...Bf2?! 7.Kd1=) 7.d3 Nf2 (7...Bf2?! 8.Kd1=+) 8.Qe5 Qe7 9.Qe7 Ke7–/+) 6...ed4 7.Bd4 (7.Bd3 Bb4 8.Kf1 d5 9.Bb5 c6 10.Qd4 Bc5 11.Qg7 Rf8–/+) 7...Bb4 (7...0–0!?–/+) 8.c3=+ Ba5 (8...Qe7 9.Qe2 Bc5 10.Nbd2 Bd4 11.cd4=+) 9.Bd3 (9.Bg7 Qe7 10.Qe2 Rg8–/+) 9...d5–/+ 10.0–0 (10.Bg7 Rg8 11.Be4 de4 12.Qd8 Kd8 13.Bf6 Ke8–/+) 10...0–0 11.Re1 f5 12.Qc2 (12.Bb5 c5 13.Be5 d4–/+) 12...c5 13.Bc5? (better 13.Be5–/+) 13...Nc5–+ 14.Nd4 Nd3 (14...Nc6 15.Nb3 Bb6 16.Nc5 Bc5 17.Nd2–+) 15.Qd3 Na6 16.Nb3 Bc7 17.N1d2 b6 18.Nf3 Nc5 19.Nc5 bc5 20.c4 (20.a3 Qd6–+) 20...d4 21.a4 (21.Reb1 Be6–+) 21...Bb7 22.h4 (22.Qa3 Ra5–+) 22...Qd6 23.Kf1 Ba5 24.Re2 Qf4 25.Qb3 (25.Rea2 Be4 26.Qe2 Rfb8–+) 25...Rab8 26.Qd3 (26.Rd1 Bc3 27.Ne1 Bg2 28.Ng2 Qh2–+ (28...Rb3?! 29.Nf4 Rb4 30.Re7–+)) 26...Be4 27.Re4 (27.Qa3 Bc3 28.Qc1 Qg4–+) 27...fe4 28.Qa3 ef3 29.Qc5 fg2 30.Kg2 Qf2 31.Kh1 Qh4 (31...Rb2 32.Qd5 Kh8 33.Qg8 Kg8 34.c5 Qg2) 32.Kg2 (32.Kg1 Qg3 33.Kh1 Rf2 34.Qd5 Kh8 35.Qg8 Kg8 36.c5 Qg2) 32...Rb2 (32...Rb2 33.Kg1 Qh2; 32...Rf2 33.Kg1 Qh2) 0–1. mpopp – pcmvr, net–chess.com, 2018.

4.d3 Nc6 5.Bd2–/+.

4.d3 d5 5.Nd2 Nc6 6.Ngf3 Bb4 7.ed5 Nd5 8.Bb2 0–0 (8...Ba5 9.Be2–+) 9.g3 (better 9.Be2!?–+) 9...Nc3 10.Bc3 Bc3 11.Rb1 (11.Bg2 Ba1 12.Qa1 Ra5–+) 11...Nd4 12.Bg2 Bg4 (12...Bg4 13.h3 Bf3 14.Bf3 Qg5–+) 0–1. mgilbert – pcmvr, net–chess.com, 2019.

4.d3 d5 5.ed5 Nd5 6.Nf3 Bb4 7.Bd2 Nc6 8.Bb4 Ndb4 9.Qd2 (9.c3 Nd5–/+) 9...0–0–+ 10.Be2 (10.a3 Ra5 11.Be2 Qe7–+) 10...Qf6 11.0–0? (better 11.c3 Nd5 12.0–0 Ra5 13.c4–+) 11...e4 12.de4 (12.c3 ef3 13.Bf3–+) 12...Qa1 13.Nc3 Qb2 14.a4 (14.Bd3 Rd8 15.Rb1 Qa3–+) 14...Rd8 15.Bd1 (15.Nd5–+) 15...Rd2 16.Nd2 Qc3 17.Nb3 Nc2 18.Bc2 Qc2 0–1. mpopp – pcmvr, net–chess.com, 2019.

4.f3 Ne4 5.fe4?? (better 5.Qe2 Nc5 6.Qe5 Ne6 7.Bb2=+) 5...Qh4–+ 6.g3 Qe4 7.Ne2 (7.Qe2 Qh1 8.Qe5 Kd8–+) 7...Qh1 8.d3 (8.d4 Nc6–+) 8...d5 9.h4 Bh3 10.Kf2 (10.Nd2–+) 10...Ra6 11.Bg5 (11.Nbc3 Rf6 12.Bf4 ef4 13.gf4 Bg4–+) 11...Bc5 12.d4 ed4 13.Nf4 (13.Ke1 Bf1 14.Kd2–+) 13...d3 14.Ke1 Qf1 15.Kd2 Be3! 16.Ke3 Qd1 17.cd3 Qc1 18.Nd2 Qa1 19.Nd5 Qe5 20.Ne4 Qd5 21.h5 Bf1 22.d4 Re6 23.Kf2 (23.a4 Qe4 24.Kd2 Rc6 25.Be3 Qd3 26.Ke1 Qe2) 23...Qe4 24.Bf4 (24.Kf1 Qf3 25.Kg1 Qg3 26.Kf1 Re1) 24...Qg2 0–1. valerypavlovich (2100) – pcmvr, net–chess.com, 2016.

4.Nf3 Ne4 5.d4?? Bb4–+ 6.Bd2 (6.c3 Nc3 7.Nc3 Bc3 8.Bd2 Ba1 (8...ed4?! 9.Qe2 Qe7 10.0–0–0–+) 9.Qa1 e4–+) 6...Nd2 7.Nbd2 e4 8.Qe2 (8.Ne5 d6 9.Nec4 d5–+) 8...d5 9.Ne5 (9.Qe3 0–0 10.Ng1 Ba5–+) 9...0–0 10.g3 (10.Qe3 f6 11.c3 Ba5–+ (11...fe5?! 12.cb4 ed4 13.Qd4–+)) 10...c5 11.dc5 (11.Rb1 Qa5 12.Bg2 cd4 13.Rb4 Qb4–+) 11...Bc3 12.Rb1 (12.Rc1 Bb2 13.Rd1 Be5–+) 12...Be5 13.Bg2 Ra5 14.Rd1 (14.c4 Ra2 15.0–0 Bc3–+) 14...Ra2 15.Ne4 Qa5 (15...Qa5 16.Nd2 Bc3–+) 0–1. imreallylousy – pcmvr, net–chess.com, 2019.

4.Nf3 Ne4 5.Qe2!? d5 6.Nc3 Nc3 7.Qe5 Qe7 8.Qe7 Be7 9.dc3 =+.

4.Nf3 Ne4 5.Qe2 d5 6.Nc3 Nc6 7.Ne4 de4 8.Qe4 Ra5 9.Bb2 =.

4.Nf3 Ne4 5.Qe2 d5 6.Ne5? Bd6–+ 7.d4 0–0 8.Qf3 c5 9.Be2? (9.Bb2–+) 9...cd4 10.Nd3 Qa5 11.c3 (11.Kf1–+) 11...dc3 12.Be3 (12.0–0 Nc6 13.Be3 c2–+) 12...c2 13.Nd2 Re8 14.Nc1 (14.Rc1 Qc3 15.0–0 Nd2 16.Qd5 Nf1 17.Rf1 Qc7–+) 14...Qc3 (14...Qc3 15.0–0 Qa1–+) 0–1. mgilbert (2125) – pcmvr, net–chess.com, 2015.

4.Nf3 Ne4 5.Ne5? Qf6 (5...Ra5?! 6.d4 Qf6 7.Qe2 Bb4 8.c3 Nc3 9.Nc3 Bc3 10.Bd2 Bd2 11.Qd2–/+) 6.Nc4?? (6.Qe2 Qe5 7.Nc3–+) 6…Qf2# 0–1. cengel – pcmvr, ChessWorld.net, 2002.

4.Nc3 Bb4

5.a3 Ba5–/+ 6.Bb2 (6.Bc4 0–0 7.Nf3 d6–/+) 6...0–0 7.Nf3 d6 8.Bd3 Na6 9.0–0 Nc5 10.h3 (10.Qe2!?–/+) 10...Bc3–+ 11.Bc3 Nfe4 12.Be4 Ne4 13.Bb2 Nc5 14.d4 (14.Re1 Na4 15.Bc1 f6–+) 14...Na4 15.Qc1 (15.Rb1 e4 16.Nd2 f5–+) 15...e4 16.Nd2 d5 17.c4 (17.Nb1 Ra6 18.Ra2 Rg6–+ (18...Nb2?! 19.Rb2 Qh4 20.Qe3–+)) 17...Bh3 (17...Ra6!? 18.Re1 Bh3 19.gh3 Rg6 20.Kf1–+) 18.gh3 Ra6 19.c5 (19.Re1 Rg6 20.Kf1–+) 19...Qg5 20.Kh2 (20.Kh1 Rh6 21.Nf3 Rh3 22.Nh2 Qh4 23.Kg1 Rh2 24.Qh6 Qh6 25.Rab1 Qh3 26.Bc3 Rg2) 20...Qf4 21.Kg1 (21.Kg2 Rg6 22.Kh1 Rh6 23.Kg2 Qg5 24.Kh2 Qg4 25.Qc3 Nc3 26.Bc3 Rh3) 21…Rg6 (21...Rg6 22.Kh1 Rh6 23.Qc3 Nc3 24.Rg1 Rh3 25.Kg2 Rh2 26.Kf1 Qf2) 0–1. tche – pcmvr, net–chess.com, 2019.

5.Bb2 0–0 6.Bc4 Bc3–/+ 7.Bc3 Ne4 8.Bb2 (8.Be5 Nf2 9.Kf2 Qh4 10.Kf1 Qc4 11.d3 Qc5–/+) 8...Nf2!–+ 9.Kf2 Qh4 10.g3 Qc4 11.d3 (better 11.Be5 Qc5 12.d4 Qa5 13.Nf3–+) 11...Qb5 12.Rb1 Qa5 13.Nf3 d6 14.h3 Be6 (14...Qa2?! 15.Ra1 Qb2 16.Ra8–+) 15.g4 (15.Bc1 Qc5 16.Be3–+) 15...Ba2 (15...Qa2?! 16.Ra1 Qb2 17.Ra8–+) 16.Ra1 (16.Qd2 Qa6–+) 16...Qb6 17.Kg2 Qb2 18.Re1 (18.Qc1 Qb6–+) 18...Nc6 19.Kg3 f5 20.c4 (20.gf5 Rf5 21.Qc1 Rf3 22.Kf3 Nd4 23.Kf2 Qc2 24.Qc2 Nc2–+) 20...f4 21.Kh4 Bc4! 22.Ra8 (22.dc4 Ra1 Combination) 22...Qf2 23.Kg5 (23.Kh5 Bf7 24.Kg5 h6 25.Kf5 Ne7 26.Ke4 Bd5) 23...h6 24.Kh5 (24.Kg6 Ne7 25.Kh5 Bf7) 24...Bf7 0–1. vaingrecsky (2270) – pcmvr, net–chess.com, 2016.

5.Bb2 0–0 6.Bd3 d6 7.Nge2 (7.Nf3 Na6=+) 7...Be6–/+ 8.0–0 Ba5 9.Ng3 g6 10.f4 Bb6 11.Kh1 ef4 12.Rf4 Bd4 13.Nge2 (13.Qb1 Nc6–/+) 13...Be5 14.Rf1 Nh5 15.Qe1 c5 16.g4? (better 16.Ng1!?–/+) 16...Bg4–+ 17.Rb1 Bh3 (better 17...Nc6–+) 18.Rg1? (better 18.Rf2 Nc6 19.Nd5 Ra2 20.Be5 Ne5 21.Nec3–+) 18...Qf6 19.Rf1 Bf1 (19...Qf1?! 20.Qf1 Bf1 21.Rf1–+) 20.Qf1 Qh4 21.Qg2 Nc6 22.Nd5 (22.a3 Na5 23.Bb5 f5–+) 22...Ra2 23.Be5 de5 (better 23...Ne5 24.Nec3 Nd3 25.cd3 Raa8–+) 24.Rb7 (24.Nec3 Ra5 25.Kg1–+) 24...Ra1 25.Ng1 Nf4 26.Nf4 ef4 27.Bf1 Qe1 28.Be2 (28.Rc7 Nd4 29.Rc5–+) 28...Rd8 29.d3 (29.d4 Rd4 30.Qf1 Qf1 31.Bf1 Rf1–+) 29…Nd4 (29...Nd4 30.Bf1 Qf1 31.Qf1 Rf1–+) 0–1. blackfox – pcmvr, net–chess.com, 2019.

5.Bb2 0–0 6.Nf3 d6 7.d3? (better 7.Bd3!?=+) 7...Qe8 8.Be2 Qc6 9.Qd2 Re8 10.a3? (better 10.a6–+) 10...Ba5 11.a4 d5 12.ed5 Nd5 13.Ra3 Ra6 14.0–0 Rb6 15.Ba1 Qc5 16.Rb3 (16.Ne4 Bd2 17.Nc5–+) 16...Rb3 17.cb3 Nc3 (17...Bc3?! 18.Rc1 Bd2 19.Rc5–+) 18.Bc3 (18.Ng5 Nc6 19.Bh5 g6–+) 18...Qc3 19.Qc3 Bc3 20.Rc1 Ba5 21.Rc5 (21.Ne1 Be6 22.Rb1 Nc6–+) 21...Nc6 22.h3 (22.Kf1 Bb4 23.Rc1 Be6–+) 22...Bb4 23.Rc1 (23.Rc2 Be6 24.Rb2 f6–+) 23...Be6 24.Bd1 Rd8 25.Ng5 Bf5 26.Bf3 (26.Ne4 Rd3 27.Ng3 Be6–+) 26...Bd2 27.Rc5 0–1. snowcert – pcmvr, net–chess.com, 2019.

5.Bd3 Na6 6.a3 Ba5 7.h3 0–0 8.Nf3 Bc3 9.dc3 d5 10.Bg5 de4 11.Bf6 Qf6 12.Be4 Nc5 13.Bd5? (better 13.Qe2–+) 13...Rd8 14.Bf7 Kf7 15.Qd5 (15.Qe2 e4 16.Qc4 Be6 17.Qc5 ef3 18.Qh5 Kf8 19.Qf3 Qf3 20.gf3–+) 15...Rd5 16.c4 Rd6 17.0–0 Bh3! 18.gh3 Qf3 19.Kh2 Rh6 20.a4 (20.Kg1 Rg6 21.Kh2 Qg2) 20...Qh3 21.Kg1 Qh1 (21...Qh2) 0–1. valerypavlovich – pcmvr, net–chess.com, 2018.

5.Bd3 Bc3 6.dc3 d5 7.Bg5 de4 8.Bf6 gf6 9.Be4 Qd1 (worse 9...Ra5 10.Qf3=) 10.Rd1 f5 11.Bd5 Ra5 12.Bb3 Ke7 13.Nf3 Nc6 14.0–0 Rd8 15.Rde1 (15.Ng5 Rg8 16.f4 Rg7=+) 15...Rc5 16.Ng5 f6 (worse 16...Rc3 17.Nf7 Rd4 18.Ne5 Ne5 19.Re5 Kd6 20.Re2+=) 17.Nh7? (better 17.Nf7!? Re8 18.f4–/+) 17...Rc3 18.Re2 (18.f4 Rh8 19.fe5 Rh7 (19...fe5?! 20.Ng5=+) 20.ef6 Kf6–+) 18...Nd4 19.Re3 f4 20.Rc3 Ne2 21.Kh1 Nc3 22.g3 Bh3 23.Re1 f3 24.Bc4 Ne2! 25.Bd3 (25.Be2 Bg2 Double attack (25...Bg2 Decoy; 25...fe2 Passed pawn)) 25...Bg2 0–1. nando (2115) – pcmvr, net–chess.com, 2016.

5.Nge2 Nc6 6.Bb2 d6 7.h3 0–0 8.Ng3 d5 9.ed5 Nd5 10.Nd5 Qd5 11.Bd3 f5 (11...Qg2?? 12.Be4 Qh1 13.Bh1+–) 12.Qe2 (12.c3 Qd3 13.Qb3 Rf7 14.cb4 Qb3 15.ab3 Nb4+=) 12...Be6 (12...Ba5?? 13.Bc4 Bd2 14.Kf1 Qc4 15.Qc4 Rf7 16.Kg1+–; 12...Qg2?! 13.Be5 Bd7 14.Bc4 (14.Bc7?? Rae8–+) 14...Kh8 15.0–0–0 (15.Bc7 Rae8 16.c3 Re2 17.Ke2 Re8 18.Kd3 Ba5–+) 15...Ne5 16.Qe5+=; 12...Ra5?? 13.Bc4 Bd2 14.Kf1+–) 13.0–0 (13.a6 ba6 14.0–0 Rab8+=) 13...Ra5–/+ 14.Rfe1 Bd6 (14...Ra2 15.Ra2 Qa2 16.Be5+/–) 15.a3 Ne7 (15...Nd4 16.Qf1–/+) 16.Nf1?? (16.Bc3 Rc5 (worse is 16...Ra3 17.Ra3 Ba3 18.Be5+/–) 17.Bb4 Ng6=) 16...Qc6?? (better is 16...e4!?–/+) 17.Ne3 (better is 17.Bc3 Rc5 18.Bb4+=) 17...Ra4?? (better is 17...Rc5 18.a4 Qd7=) 18.Bb5+– Qb6 19.Ba4 Qb2 20.Nc4 Qd4 21.Bb3 Ng6 (21...Bc4 22.Qc4 Kh8 23.Qd4 ed4 24.c3+–) 22.Nd6 (22.Ne5!? Bb3 23.Ng6 Bc4 24.Ne7 Kh8+–) 22...Qd6 23.Be6 Qe6 24.Qb5 1–0. Jensen,Arent O – Woods,DM, Eberhardt Wilhelm Cup B Final bd06, 1966.

5.f3 Nc6 (5...Bc3 6.dc3 Ra5 7.Bg5–/+) 6.a3 (6.Bb2 0–0=+) 6...Ra5 (better 6...Bc3 7.dc3 Ra5–/+) 7.Nb1 (better 7.Bb2!? Bc5 8.Bc4–/+) 7...Ne4!–+ 8.fe4?? (better 8.Ne2 Nd6 9.Bb2–+) 8...Qh4 9.g3 Qe4 10.Ne2 (10.Qe2 Qh1 11.Qg2 Qg2 12.Bg2 Nd4–+) 10...Qh1 11.c3 Qh2 12.d3 (12.d4 Be7 13.Qd2 0–0–+) 12...Bc5 13.d4 ed4 14.cd4 (14.Qd3 dc3 15.Kd1–+) 14...Bd4! 15.Ra2 (15.Nd4 Qg1 Double attack (15...Qg1 Decoy)) 15...Bf2 16.Kd2 Rd5 17.Kc2 Rd1 18.Kd1 d5 19.Bf4 Qh1 20.Nd2 Bh3 21.Bc7 Bf1 22.Rb2 Nd4 23.Nd4 Bd3 24.Nf1 Qf1 25.Kd2 Bd4 26.Ra2 Qe2 27.Kc1 Qe1 0–1. valerypavlovich – pcmvr, net–chess.com, 2017.

3.Nf3 Ra5

4.Bb2 Nc6=.

4.Nc3 Nf6 5.e4 d5 6.ed5 Nd5 7.Ne5?? (better 7.Bb2 Bg4 8.Bc4=) 7...Nc3–+ 8.Nc4 (8.dc3 Re5 9.Be3–+) 8...Nd1 9.Na5 (9.Kd1 Ra4–+) 9...Nf2! 10.Kf2 Qd4 (10...Bc5 11.d4 Qd4 12.Ke1 Qf2 13.Kd1 Bg4 14.Be2 Qe2) 11.Ke2 (11.Ke1 Qe5 12.Be2 Bg4 13.Kf2 Bc5 14.d4 Bd4 15.Be3 Qe3 16.Kf1 Qe2) 11...Qe4 12.Kf2 Bc5 13.Kg3 (13.d4 Bd4 14.Be3 Qe3) 13...Qg4 0–1. samantho – pcmvr, net–chess.com, 2018.

4.e3 e4 5.Nd4=.

4.e3 Nf6 5.Bc4 (5.Bb2 Nc6=) 5...d5=+ 6.Be2 Bd6 7.0–0 (7.Bb2 Qe7=+) 7...0–0 (7...e4 8.Nd4=+) 8.d3 (8.Bb2 Qe7=+) 8...Nc6 (8...Be6 9.Bd2 Ra8 10.Nc3=+) 9.Bd2 Ra8 10.Nc3 e4 11.de4 de4 12.Nd4 Be5 (12...Qe8!?=+) 13.Nc6= bc6 14.Bc4 (14.f4!? ef3 15.Bf3=+) 14...Qd6–/+ 15.g3? (better is 15.Qe2–/+) 15...Qc5 (15...Qb4 16.Qe2 Bc3 17.Rab1–+) 16.Qe2 Bg4 17.Ne4 Ne4 18.Qg4 Qc4 19.Rad1 Nd2 20.Qc4 Nc4 21.Rd3 Ra2 22.c3 f5 23.h4 Nd2 24.Rd1 Ne4 25.Rf1 Rb8 26.c4 Bg3! 27.fg3 Rbb2 28.Rf5 Rg2 29.Kf1 Ng3 30.Ke1 Ra1 31.Rd1 Re2 0–1. cefik – pcmvr (1665), internet, 2005.

4.e4 Nf6=.

2.ba5 Nf6

3.Bb2 Ra5 (--> 2.ba5 Ra5 3.Bb2 Nf6).

3.Bb2 Nc6 4.Nf3 e6 5.e3 Ra5 6.Bc4 d5 7.Be2 Bd6 8.d4 Ne4 9.0–0 0–0 10.c4 dc4 (10...b6!?–/+) 11.Bc4= 1–0. Wurm,Tamas – Ferrero,Leandro, IECG, 2004.

3.Bb2 d6 4.Bf6 (4.e3 e5=) 4...ef6 5.c3 (5.e3 Ra5 6.Nf3 d5=) 5...Ra5=+ 6.Qb3 Nd7 7.e3 Nc5 (7...Nb6 8.d4=+) 8.Qb2 Be7 (8...d5 9.d4 Ne4 10.Nf3=+) 9.Nf3= 0–0 (9...f5 10.d4 Ne4 11.Bd3=) 10.Be2 (10.d4 Ne4=) 10...Na4 (10...Re8 11.0–0=) 11.Qb4 (11.Qc2 Re8=+) 11...c5 12.Qb3 Be6 (12...d5 13.0–0=+) 13.Qb7= d5 (13...Nb6 14.Qe4=) 14.0–0 Qd6 15.Qb3 Bf5 (15...Rb8 16.Qd1=) 16.Nh4 c4 17.Qa3 (< 17.Nf5 cb3 18.ab3 Qe5 19.Ne7 Qe7 20.Ra4 Rfa8 21.Ra5 Ra5–/+) 17...Qe6 18.Qc1 Nc5 19.Nf5 Qf5 20.Na3 (20.Bd1 Nb3 21.Bc2 Nc1 22.Bf5 Nb3 (22...Ra2?! 23.Ra2 Na2 24.Rd1=; 22...Na2?! 23.d3=) 23.ab3 Ra1 24.bc4 dc4–/+) 20...Rfa8=+ 21.Nc2 Ra2 22.Ra2 Ra2 23.Nd4 Qg6 24.Bf3 Bd6 25.Bd5?? (better is 25.h4 Ne4 26.Qb1=+) 25...Qh5–+ 26.Bf7 Kf7 27.f4 Qd5 28.Nf5 Qf5 (29.Rd1 Bf4–+) 0–1. 73DADDELDU37 – Juliette2103, mySchach.de, 2005.

3.Nc3 e5 4.e4 Ra5 5.Bb2 Bc5 6.Bc4 (6.Nf3 d6=+) 6...d6 7.Nf3 Bg4 (7...c6 8.Bb3=+) 8.h3 Be6 (8...Bh5 9.g4 Bg6 10.d3=+) 9.Be6 (9.Bb3 Nc6=+) 9...fe6= 10.d3 (10.d4 ed4 11.Nd4 Bd4 12.Qd4 0–0=+) 10...0–0=+ 11.Qd2 Nc6 12.0–0 Qe8 (12...Qa8 13.a3–/+) 13.Ne2 (13.Rfb1 Qf7=+) 13...h6 (13...b5 14.Nc1 Ra4 15.Nb3=+) 14.Ng3 (14.Nc1 Ra8=+) 14...Qg6 15.Nh4?? (better is 15.Kh2=+) 15…Qg3–+ (16.Nf3 Ne4–+) 0–1. Christobal (1630) – pcmvr, internet, 2005.

3.d3 e5=+ 4.Bb2 (4.Nf3 Nc6=+) 4...Bb4 5.c3 Ba5 (5...Be7 6.Nf3 Nc6 7.d4=+) 6.Nf3 Qe7 7.e4 d5 (7...0–0 8.Be2=+) 8.Nbd2 (8.ed5 Nd5 9.Qb3 Qe6=+) 8...Nc6 (8...0–0 9.Be2=+) 9.ed5 (9.Qb3 de4 10.de4 Bb6=+) 9...Nd5 10.c4 (10.Qb3!? Qe6 11.Ng5–/+) 10...Nf4–/+ 11.Be2 (better is 11.Qb3!?–/+) 11...Ng2–+ 12.Kf1 Bh3 13.Kg1 (13.Qb3 Nf4 14.Ke1 0–0–+) 13...Bd2 (13...Nf4 14.a4–+) 14.Qd2 Nf4 15.Re1?! (15.Bf1 Bf1 16.Kf1 Qd7–+) 15...Ra2 (15...Qf6 16.Ne5 Ne5 17.Bg4 Bg4 18.Re5 Ne6 19.Ra5–+) 16.Bd1 (16.Bf1 Bf1 17.Kf1 Nd3 18.Qd3 Rb2–+) 16...Qf6 17.Ne5 Ne5 18.Re5 Qe5!! 19.Be5 Rd2 20.Ba4 Ke7 (better is 20...c6!? 21.Bf4 Re2 22.f3–+) 21.Bf4 Re2 22.f3 Ra8 23.Bc7 Ra4 24.Be5 (24.Bd6 Kd6 25.c5 Kd5 26.d4 Ra1) 24...Rg2 25.Kf1 Rb2 26.Ke1 Ra1 0–1. juancabeta – pcmvr (1735), Chesshere.com, 2005.

3.d4 d5 4.Nf3 =.

3.e4 Ne4–/+ 4.Bd3 (4.Bb2 Ra5 5.f3 Nf6–/+) 4...Nc5 5.Bc4 (5.Be2 e5–/+) 5...d5 6.Bd3 (better is 6.Bb5!? c6 7.Be2–/+) 6...Nd3–+ (7.cd3 e5–+) 0–1. cole baker – pcmvr, Chesshere.com, 2005.

3.d4 e6

4.c4 d5 5.cd5 ed5=+ 6.Bg5 Bf5 7.e3 Bb4 8.Nd2 Ba5 9.Ngf3 Bc3 10.Rc1 Bb2 11.Rc5 Ra2 12.Bb5?? c6–+ 13.Bc6 bc6 14.0–0 Ba3 15.Qb3 Bc5 16.Qa2 Bd6 17.Ne5 0–0 18.Rc1 Qc7 19.Bf6 gf6 20.Nef3 Nd7 21.Nh4 Bd3 22.Qb3 Bg6 23.h3 Rb8 24.Qa4 Rb5 25.Qa8 Nb8 26.g3 Ra5 (27.Rc6 Ra8 (27...Qc6?! 28.Qa5 Na6 29.Qd8 Kg7 30.e4–+) 28.Rc7 Ra1 29.Kg2 Bc7–+) 0–1. chess55555 – pcmvr (1965), internet, 2007.

4.c4 Ne4 5.e3 =.

4.Qd3 d5=+ 5.Qb5 Nc6 6.Qd3 e5–/+ 7.Ba3? Nd4–+ (8.Qc3 Bf5 9.Bf8 Nc2 (9...Kf8?! 10.Na3–+; < 9...Rf8 10.Na3–+) 10.Kd1 Kf8–+ (10...Rf8?! 11.Qe5 Qe7 12.Qf5 Na1 13.Nc3–+; 10...Na1 11.Bg7 Ng4 12.Bh8 Nf2 13.Ke1 Nh1 14.Qe5 Be6 15.Bf6 Nc2 16.Kd2=); 7...ed4?! 8.Bf8 Rf8 9.Nf3–/+) 0–1. lachezar – pcmvr, Chesshere.com, 2005.

4.e3 d5 =.

3.Nf3 Ra5

4.Bb2 Nc6 =.

4.d4 Ra7 =.

2.Bb2 ab4=+

3.a3 Ra4 4.c3 (4.c4 Ra5=) 4...b5 (4...Ra8 5.cb4 d5 6.Nf3=) 5.cb4 e6 (5...c6 6.Nc3 Ra8 7.a4 ba4 8.Ra4+=) 6.e3 (6.Nc3 Ra6+/–) 6...Qe7? (6...c6 7.Nc3 Ra8 8.Nf3=) 7.Bc3 (7.Nc3 Ra8 8.Nb5 d6+–) 7...Ba6?? (7...c6 8.Bb2=) 8.Bc4 (8.Be5!? Nc6 9.Bc7 Nb4+–) 8...bc4 (better is 8...Bb7!? 9.Bb5 Ra3 10.Na3 Bg2+=) 9.Qa4+/– Nf6 (9...Qg5!? 10.Ne2 Qg2+–) 10.b5 Bb5?? (better is 10...Bb7 11.f3 Qd8+–) 11.Qb5 Qd8 12.a4 c6 13.Qb7 g6 14.a5 Bc5 15.Bf6 Qf6 16.Qb8 Ke7 17.Qb7 Qa1 18.a6 h5? 19.Nf3+– f6 20.0–0 h4 21.Nc3 Rh5 22.Ra1 h3 23.a7 hg2 24.a8Q Rf5 25.Ra7! Rf3 26.Qd7 1–0. Cruncher87@ – ben188@, mySchach.de, 2005.

3.a3 Ra6 4.ab4= Ra1 5.Ba1 c6 (5...d5 6.Nf3=) 6.e3 Qc7 7.c4 f6 (7...e5 8.Bc3=) 8.Nf3 Qd8 9.b5 e5 (9...cb5 10.cb5 d5 11.d4+=) 10.Be2 (better 10.Ne5!? Qa5 11.Bc3+–) 10...e4 11.Nd4 c5 12.Nc2 b6 (12...d5 13.cd5 Qd5 14.Nc3+=) 13.Nc3 Bb7 14.0–0 Qc7 15.d3 Bd6 16.h3 Bh2 17.Kh1 ed3 18.Bd3 Ne7? (18...Be5+–) 19.Be4?? (better 19.f4 Bf4 20.ef4+–) 19...Be4 (better 19...Be5!? 20.Nd5 Nd5 21.Qh5 Kd8 22.cd5 Qd6+–) 20.Ne4+– 0–0 (20...Be5 21.Be5 Qe5 22.Nd6 Kf8 23.f4+–) 21.f4 (21.g3 Bg3 22.fg3 Qb7+–) 21...f5 22.Qd6?? (better 22.Be5 Qd8 23.Ng5+– (23.Kh2?! fe4 24.Bb8 Qb8+–)) 22...Qd6+– 23.Nd6 Bg3 24.Rf3 Bh4 25.g3 Bf6 26.Bf6 (better 26.Rf2!?+–) 26...Rf6= 27.Nb7 d5 28.cd5 (28.Na3 Nd7=) 28...Nd5=+ 29.Nd8? (better 29.Na3=+) 29...Rd6–+ 30.Nc6 Nc6 31.bc6 Rc6 32.g4 fg4 33.hg4 b5 34.e4 (34.Na3 b4 35.Nc4 Re6–+) 34...Nf6 35.e5 Ng4 36.Rg3 h5 37.f5 (37.Kg2–+) 37...Ne5 38.Re3 Nf7 39.Re8 Kh7 40.Rb8 Rf6 (40...b4!? 41.Ne3–+) 41.Rb5 Rf5 42.Ne3 Re5 43.Nc4 Rg5 44.Kh2 Rd5 45.Ne3 (45.Kg2 g5–+) 45...Re5 (45...Nd6 46.Ra5 Re5 47.Ra3–+) 46.Ng2 (46.Nc4 Rf5–+) 46...c4 47.Rb4 (47.Rb7 Ng5–+) 47...Nd6 48.Nf4 c3 49.Rb3 c2 50.Rc3 g5 51.Nd3 (51.Rc7 Kh6–+) 51...Re2 52.Kg3 (52.Kg1–+) 52...Ne4 53.Kf3 Nc3 (53...Nc3 54.Nc1 g4 55.Kg3 Re1–+) 0–1. BeepBeepImAJeep (2700) – ChildishCactus (2525), lichess.org, 2019.

3.a3 Nc6 4.ab4 Ra1 5.Ba1 Nb4 6.Bc3 e6 7.Na3 Nd5 8.Nc4 Nc3 9.dc3 d5 10.Ne5 Bd6 11.f4 f6 12.Nef3 Bf4 13.g3 Be3 14.Nh3 Ne7 15.Nd4 0–0 16.Bg2 c5 17.Nf3 Qa5 18.Qd3 Qa1 19.Qd1 Qc3 20.Kf1 Nf5 21.Nf2 Bf2 22.Kf2 Ne3 23.Qd3 Qd3 24.cd3 Ng2 25.Kg2 Bd7 26.Rf1 b5 27.e4 de4 28.de4 Ra8 29.e5 f5 30.Nd2 Bc6 31.Kh3 Ra2 32.Rd1 c4 33.Nb1 Bd5 34.Nc3 Rb2 35.Nd5 ed5 36.Rd5 c3 37.Rc5 c2 38.e6 Kf8 39.Kh4 g6 40.Kg5 Ke7 41.h4 b4 42.Kh6 b3 43.Kh7 Ke6 44.Kg6 Rb1 45.h5 c1Q 46.Rf5 Qc2 47.g4 Rg1 48.Kg5 Rg4 49.Kg4 Qf5 50.Kh4 Qh5 51.Kh5 b2 52.Kg5 b1Q 53.Kf4 Qd3 54.Kg5 Qf3 55.Kg6 Qg4 56.Kh7 Kf7 57.Kh6 Qg6# 0–1. ronnieg (2545) – robynet (2835), freechess.org, 2001.

3.a3 e5 4.ab4 Ra1 5.Ba1 Bb4 (5...f6 6.Bc3=+) 6.Be5= Nc6?? (better 6...Nf6=) 7.Bg7+– Bd2 (7...Nf6 8.Bh8 d5+–) 8.Qd2 (8.Nd2 d6+–) 8...Nge7 (8...Nf6 9.Bh8 Ne4 10.Qf4+–) 9.Bh8 Ng6 10.Qe3 (better 10.Qc3 d6+–) 10...Nce5 (10...Qe7 11.Qe7 Ke7+–) 11.Be5 Ne5 12.Qe5 Qe7 13.Qh8 (better 13.Qc7!? Qd8 14.Qe5 Kf8 15.Qh8 Ke7 16.Qh7 Qa5 17.c3 d6+–) 13...Qf8 14.Qf8 (better 14.Qh7!? d5+–) 14...Kf8 15.e3 d6 16.Bd3 Bd7 17.Bh7 Kg7 18.Be4 c5 19.Bb7 f5 20.Nc3 c4 21.Nd5 Be6 22.Ne7 (22.Ne2 Bd7+–) 22...Kf7 23.Nf5! Bf5 24.Nf3 Bc2 25.0–0 (25.Kd2 Bf5+–) 25...Bd3 26.Rd1 (26.Bd5 Kf6 27.Rc1 Be2+–) 26...Be2 27.Rd6 Bf3 28.Bf3 Ke7 29.Kf1 (29.Rc6 c3+–) 29...c3 (29...Kd6 30.Ke2 Ke7+–) 30.Rc6 c2 31.Rc2 Kd6 32.h4 Ke5 33.h5 Kf6 34.h6 Kg6 (34...Ke6 35.h7 Kf6 36.h8Q Ke6 37.Qg7 Kf5 38.g4 Ke6 39.Rc6) 35.Rc6 Kh7 (35...Kf7 36.Bd5 Ke7 37.h7 Kd8 38.h8Q Kd7 39.Qc8 Ke7 40.Qe6 Kf8 41.Qf7) 36.Be4 Kh8 (36...Kg8 37.Rf6 Kh8 38.Rf8) 37.h7 (37.Rc8) 37...Kg7 38.Bd5 (38.Rc7 Kh8 39.Rc8 Kg7 40.h8Q Kf7 41.Bf5 Ke7 42.Qf8) 38...Kh8 (38...Kh7 39.e4 Kh8 40.g4 Kg7 41.Rc7 Kg6 42.f4 Kh6 43.e5 Kg6 44.Be4 Kh6 45.Rh7) 39.Rc7 (39.Rh6 Kg7 40.h8Q) ½–½. Agiant – Peltirumpu, lichess.org, 2019.

3.a3 e6 4.ab4 Ra1 5.Ba1 Bb4 6.Bg7 Nf6 7.Bh8 Be7 8.Bf6 (8.e3 b6+–) 8...Bf6 9.Nf3 d5 10.Nc3 (10.e3 e5+–) 10...c5 11.e3 Nc6 Black prepares d4 12.Bb5 Bd7 (12...Qa5 13.Bc6 bc6 14.0–0+–) 13.0–0 Qc7 14.Qa1 d4 (14...Ke7 15.Rb1+–) 15.Qa8 (15.Ne4 Qd8+–) 15...Ke7 (15...Nd8 16.Bd7 Qd7 17.Ne4+–) 16.Bc6 (better 16.Ne4 Ne5 17.Ne5 Be5 18.Bd7 Qd7+–) 16...Bc6 17.Ne2 b5 18.ed4 (better 18.Qa3 Bf3 19.gf3+–) 18...Ba8–+ 19.dc5 (19.c3 Bf3 20.gf3 cd4–+) 19...Bf3 20.gf3 Qc5 21.d4 (21.c3 Qg5 22.Ng3 Qd2–+) 21...Qg5 (21...Qc2 22.Re1–+) 22.Kh1 (22.Ng3 Qd2 23.Ne4 Qc2 24.Nf6 Kf6–+) 22...Qf5 23.Ng3 Qf3 (23...Qc2 24.d5–+) 24.Kg1 Qc3 (24...h5 25.Re1 Bd4 26.Nh1–+) 25.Kh1 (25.d5 Qc2 26.Re1 b4 27.d6 Kd8–+) 25...Qc2 26.Kg1 (26.d5 b4 27.Nh5 Be5–+) 26...Bd4 27.Kg2 b4 28.Kg1 b3 29.Kg2 b2 30.Kh3 b1Q (30...Bf2 31.Rh1 Be3 32.Re1–+) 31.Rb1 Qb1 32.Ne2 Bf2 (32...Qf5 33.Kg3 Qf2 34.Kh3 Qf3 35.Ng3 f5 36.Kh4 Qg4) 33.Nd4 (33.Kg2 Bc5 34.Ng3 Qg1 35.Kf3 Qf2 36.Kg4 f5 37.Nf5 ef5 38.Kh5 Qh2 39.Kg5 Be3 40.Kf5 Qf4) 33...Bd4 34.Kg2 Qe4 (34...Qe4 35.Kg3 h5 36.h3 Bg1 37.h4 Qg4) 0–1. sirgeshdb (1680) – fetzen_player (2255), lichess.org, 2020.

3.a3 e6 4.h3 Nf6 5.h4 Be7 6.h5 c5 (6...0–0!?–/+) 7.h6 gh6 8.Rh6 Rg8 (8...Nc6 9.Nf3+=) 9.e3 Rg6 10.Rh3 d5 11.Bd3? (better is 11.Nf3 ba3 12.Ra3 Ra3 13.Na3+=) 11...Rg2–+ 12.Kf1 Rg1?? (better is 12...Rg7–+) 13.Kg1+= e5 14.Be5?? Bh3–+ 15.Qf3 Bg4 16.Qf4 Nbd7 17.Bc7 Qc8 18.Bb5 h5 19.Be5 Kf8 20.Qg5?? Ne5–+ 21.Qe5 Bf3 22.ab4 Ra1 23.Qa1 Qh3 24.Bf1 Qg4 25.Kh2 Qh4 26.Bh3 Ng4 27.Kg1 Qf2 0–1. xtom – wks, kurnik, 2011.

3.a3 Nf6 4.ab4 Ra1 5.Ba1 e6 6.g4 (6.c3!?=+) 6...Bb4 7.g5 Nh5 (7...Ne4–/+) 8.e3? (better 8.h4!? 0–0 9.e3=+) 8...Qg5–+ 9.c3 (9.Nf3 Qe7–+) 9...Be7 10.Nf3 (10.c4 b6–+) 10...Qg6 (10...Qa5 11.Bb2–+) 11.Qc1 (11.c4 Qh6–+) 11...Bf6 (11...e5 12.Rg1 Qf5 13.Qd1–+) 12.Be2 (12.d4 b6–+) 12...0–0 (12...e5 13.d4 e4 14.Nfd2–+) 13.Rg1 Qf5 14.d3 Nc6 15.e4 Qc5 (15...Qf4 16.Nbd2–+) 16.Qh6 (16.Bb2 Qb6–+) 16...Kh8 (16...Qa5 17.Bb2 Qa2 18.Qc1–+) 17.Qe3 (17.Qd2 e5–+) 17...Qe3 (17...Qa5!? 18.Bb2 Qa2 19.Qc1–+) 18.fe3 Ne5?? (18...e5 19.c4–+) 19.d4?? (better 19.Ne5 Be5 20.Bh5 Bh2 21.Rg2+=) 19...Nf3–/+ 20.Bf3 (20.Bf3 Bh4 21.Ke2–/+). Agiant – d0nthurtmepls, lichess.org, 2019.

3.c3 c5 4.cb4=+ cb4 5.Qb3 e6 6.Nf3 Nc6 7.Ne5 Nf6 8.e3 d6 (8...Be7 9.Be2=+) 9.Nc6 bc6 10.Bd3 (10.Qb4!? Bd7 11.Qc3=+) 10...d5–/+ 11.0–0 (11.a3 Rb8–/+) 11...c5 12.Bb5 Bd7 13.Bd7 Nd7 14.a3 c4 15.Qd1 ba3 16.Na3 Nc5 17.Nb5?? (better 17.Nc2–/+) 17...Qb6 (better 17...Rb8–+) 18.Ra8+– Kd7 19.Nd4 (19.Ra7 Kd8 20.Qf3 Qb5 21.Qf7 Nd7 22.Ra8 Kc7+–) 19...Qb2 20.Qf3 (better 20.Qh5 g6 21.Ra7 Nb7 22.Qe5+–) 20...f6 21.Ra7 Nb7 (21...Kd6 22.Qg3 e5 23.Nf5 Kc6 24.Ng7 Qd2 25.Ne8+–) 22.Qg4 f5 23.Nf5! h5 (23...ef5 24.Qf3 Double attack (24.Qf3 Decoy)) 24.Qg6 ef5 (24...Kc7 25.Nd4 Kb6+–) 25.Qf5 Kc6 (25...Kd6 26.Ra6 Kc7 27.Qf7 Be7 28.Qe7 Kb8+–) 26.Qe6 (26.Qc8 Kd6 27.Ra6 Qb6 28.Rb6 Ke7 29.Qc7 Ke8 30.Re6 Be7 31.Qe7) 26...Nd6 (26...Bd6 27.Ra6 Kc7 28.Qf7 Kc8 29.Ra8 Bb8 30.Qd5 Nd8 31.Qc4 Kd7 32.Qd3 Ke7+–) 27.Qd7 Kc5 28.Rc7 (28.Qc7 Kb4 29.Qa5 Kb3 30.Qa4) 28...Kb6 (28...Kb4 29.Rc6 Qd2+–) 29.Qc6 Ka5 30.Ra7 Kb4 31.Qb6 (31.Qa4 Kc5 32.Rc7 Kb6 33.Qa7 Kb5 34.Qb8 Nb7 35.Rb7 Ka6 36.Qa7) 31...Nb5+– 32.Ra5 Qd2 (32...Kb3 33.Rb5 Bb4 34.Rb4 Kc2 35.Qg6 Kd2 36.Rb2 Kc3 37.Qc2) 33.Rb5 Kc3 34.Qd8 (34.Qa5 Kc2 35.Qa4 Kc3 36.Qa1 Kd3 37.Rd5 Kc2 38.Qa2 Kc3 39.Qd2 Kb3 40.Rb1 Ka3 41.Ra5) 34...Kc2 (34...d4 35.Rbb1 de3 36.Rfc1 Qc1 37.Rc1 Kb2 38.Rc4 Bc5 39.Qd3 ef2 40.Kf1 Ka1 41.Rc1 Kb2 42.Rc2 Ka1 43.Qd1) 35.Rd5 Qe2 (35...Qe2 36.Qa5 Qf1 37.Kf1 Bb4 38.Qb4 Rb8 39.Rd2 Kc1 40.Qc3 Kb1 41.Rd1 Ka2 42.Ra1). Abdullaevich (1880) – NithishBharadhwaj (1705), lichess.org, 2020.

3.c3 Nc6 4.cb4 Nb4 5.Qb3 c5 6.a3 d6?? (better 6...Nc6–/+) 7.ab4+– Ra1 8.Ba1 c4?! (8...Qb6+–) 9.Qc4 Be6 (9...e5 10.Qb5 Qd7 11.e4+–) 10.Qb5 Bd7 (10...Qd7 11.e4+–) 11.Qb7 Nf6 (11...Bc8 12.Qb8+–) 12.e3 g6 (12...e6 13.Nf3+–) 13.g4! Bg7 (13...Bg4 14.Bf6 Combination; 13...Ng4 14.Bh8 Pinning (14.Bh8 Deflection)) 14.g5 Ne4 (14...Nh5 15.Bg7 Ng7 16.Bb5+–) 15.Nc3 (better 15.Bg7 Rg8 16.Bh6+–) 15...Ng5 16.Bc4 0–0 (16...h6 17.d4+–) 17.h4 Ne6 18.h5 Bc3 (18...Qa8 19.Qa8 (19.Qd7?! Qh1 20.Kf1 Qh5+–) 19...Ra8 20.Bb2+–) 19.Bc3 Ng5 (19...g5 20.Qg2 h6 21.f4+–) 20.Qg2 (better 20.hg6 e5 21.f4 hg6 22.fg5+–) 20...Qc7 (20...e6+–) 21.Qg5 (21.hg6 Nf3 22.Qf3 Bf5 23.gh7 Bh7 24.Qg3 Bg6 25.Qg6) 21...Qc4+– 22.hg6 (better 22.Qh6 f6 23.hg6+–) 22...Bb5 (22...fg6 23.Qe7 Qf7+–) 23.Qh6 (23.gh7) 23…Qf1 0–1. Agiant (1625) – ChesspatzerPoland (1635), lichess.org, 2021.

3.c4 bc3 (--> 3.c3 bc3).

3.d3 c5 4.Nf3 d5 5.e3 Bg4 6.Be2 Nc6 7.c3 (7.a3 Nf6=+) 7...bc3 8.Nc3 White fights for the Initiative 8...Qa5 (8...Nf6 9.h3 Bc8 10.0–0–/+) 9.0–0=+ Nf6 10.Qb3 Nb4 (better 10...Qb4–/+) 11.a3+= c4?? (11...Nc6 12.Nd5 (12.Qb7? Rb8 13.Qc6 Bd7 14.Qd7 Nd7–+) 12...Nd5 13.Qd5+=) 12.ab4?? (12.Qb4 cd3 13.Bd3 Bf3 14.gf3 b6+–) 12...cb3?? (better 12...Qa1! 13.dc4 Qa7+=) 13.ba5+– e6 14.Nd4 Be2 15.Nce2 (15.Nde2?! Bb4+–) 15...Bd6 16.Nb5 Bb8 17.Bf6 gf6 18.Rfb1 Rg8 (18...Ra6 19.Nbd4 b6 20.ab6 Rb6 21.Nb3+–) 19.Rb3 Ra6 (19...Kd7 20.e4+–) 20.Rc3 (better 20.Nbd4 Bc7 21.Rb7 Bd8+–) 20...Kd7 21.Nbd4 Rg6 (21...b6 22.Nb3+–) 22.Rac1 (22.Rb1 Ra7 23.a6 e5+–) 22...Rh6 (22...Ra5 23.Nb3 Rb5 24.Ned4+–) 23.Nb3 (better 23.Rb1 Ra7 24.f4 Kd8+–) 23...Bh2 24.Kf1 Bd6 25.Nc5 Bc5 26.Rc5 Rh1 27.Ng1 b5 (27...Kd6 28.g3+–) 28.ab6 (better 28.Rb5 Ra7+–) 28...Rb6 29.Rc7 Kd6 (29...Ke8 30.g3 Rh2 31.Rc8 Ke7 32.R1c7 Kd6 33.Nf3 Rb1 34.Ke2 Rb2 35.Nd2+–) 30.d4 (30.Rf7 Rh6+–) 30...e5 (30...Rb1 31.R7c6 Kd7 32.Rb1 Kc6 33.Rb8+–) 31.de5 (31.Rf7 Ke6 32.Rfc7 Kd6+–) 31...fe5 32.Rf7 Ke6 (32...Rb2 33.Rf6 Kd7 34.Rd1+–) 33.Rfc7 e4 (33...h5 34.g3 Rh2 35.R1c6 Rc6 36.Rc6 Kd7 37.Rh6+–) 34.R7c6 Rc6 35.Rc6 Kd7 36.Rf6 Ke7 37.Ra6 Rh5 (37...Kf7 38.Rd6+–) 38.Nh3 (38.Nh3 Kd7 39.Nf4 Rh1 40.Ke2+–) 1–0. aravind555 – Chriske1995, lichess.org, 2019.

3.d4 Nf6 4.d5 d6 5.Nf3 (5.Bf6 ef6 6.e3 f5–/+) 5...c5 (5...e6 6.de6 Be6 7.e3–/+) 6.e3=+ e5 7.Bc4 (7.de6 fe6 8.c3 bc3 9.Bc3 Be7–/+) 7...Be7 8.0–0 0–0 9.Re1 (9.a3 ba3 10.Ra3 Ra3 11.Na3 Bg4–/+) 9...Nbd7 10.e4 Nb6 11.Nbd2 (11.Bb5 Na4 12.Bc1 Qa5–/+) 11...Nc4 12.Nc4 Nd7 13.Bc1 f5 14.Bd2? (14.ef5 Rf5 15.Ne3 Rf7–/+) 14...Nf6 (better 14...b5!? 15.Nb2–+) 15.ef5 Bf5 16.c3 Bg6 (better 16...bc3!? 17.Bc3 Ne4–+) 17.cb4–/+ b5 18.Ne3 (18.Na5 Qc7 19.bc5 A) 19...Qc5 20.Nc6 Bd8 21.Bb4 (worse 21.Nd8 Qd5 22.a4 ba4–/+) 21...Qd5 22.Qd5 Nd5 23.Bd6=; B) 19...Ra5 20.Ne5 Ra4 (worse 20...de5 21.d6 Bd6 22.cd6+=) 21.Ng6 hg6=+) 18...c4 19.Bc3 (19.Ng5 Qd7–/+) 19...Qd7 (19...Ne4 20.Bb2–+) 20.Nh4 (20.Be5 de5 21.Ne5 Qc7 22.Ng6 hg6–+) 20...Bf7 (20...Bh5!? 21.Qc2–+) 21.Nhf5–/+ Bd8 22.Ng3 (22.Qf3!?–/+) 22...Bb6–+ 23.Nc2? (23.Qd2 Be3 24.Re3 Nd5–+) 23...Rad8 (23...Ng4 24.Ne3 Nf2 25.Qd2–+) 24.Qf3? (24.Ne3–+) 24...Bd5 25.Qd1 Bb7 (better 25...Qb7 26.Ne3 Be3 27.fe3 Bg2–+) 26.a4 (26.Ne3–+) 26...Qc6 (26...Ng4 27.Ne4 Nf2 28.Qd6 Qd6 29.Nd6 Rd6 30.Ne3 Nh3 31.Kh1–+) 27.Qf3 e4 (better 27...Ng4! 28.Qc6 Bc6–+) 28.Qe2 e3 (better 28...ba4 29.Bd4 Ra8–+) 29.Qf3?? (better 29.Ne3 Be3 30.fe3 ba4 31.Nf5–/+) 29...ef2–+ 30.Kf1 fe1Q 31.Re1 (31.Ke1 Ne4 32.Ne4 Rf3 33.gf3 Rf8–+) 31...Qf3 (better 31...Ng4! 32.Ne4 Nh2 33.Ke2 Nf3 34.gf3–+) 32.gf3 Bf3 (32...Ng4 33.Re7 Rf3 34.Ke1 Bf2 35.Kd1 Rd3 36.Kc1 Rc3 37.Rb7–+) 33.Nd4 (33.Bd4 Nd5 34.Bb6 Nb6–+) 33...Bg4 (better 33...ba4 34.Nf3 Nd5–+) 34.Nb5 (34.a5 Nd5 35.Kg2 Ba5 36.ba5 Nc3–+) 34...Rfe8 (34...Nd5 35.Nf5 Rf5 36.Kg2 Bf3 37.Kh3 Bf2 38.Re8 Re8 39.Nd6 Nf4) 35.a5 (35.Re8 Re8 36.Kg2 Nd5–+) 35...Re1 (35...Bh3) 36.Ke1–+ Ba7! (36...Ba7 37.Na7 Nd5–+) 0–1. alessandrocarvalhaes (1905) – phronmophobic (1865), lichess.org, 2020.

3.e4 c5 4.Nf3 Nc6 5.Be2 (5.Bb5 d5=+) 5...d6 6.0–0 (6.a3 ba3 7.Na3 Nf6–/+) 6...Be6 (6...e5 7.Bc4–/+) 7.d4 (7.Ng5 Qc8=) 7...cd4=+ (< 7...Ra2 8.Ra2 Ba2 9.d5+=) 8.Nd4 (8.a3 ba3 9.Na3 Nf6 10.Nd4 Bd7=+) 8...Nd4 (8...Ba2!? 9.Bb5 Qc8=) 9.Qd4+= Ra2?? (better is 9...Qa5+=) 10.Ra2 (10.Bb5 Bd7 11.Bd7 Qd7 12.Ra2 Qc8+–) 10...Ba2 (10...Nf6 11.Bb5 Nd7+–) 11.Bb5 (11...Qd7 12.Bd7 Kd7 13.Qa7+–) 1–0. yulio – WoodPusher83, ChessWorld.net, 2006.

3.e4 Nc6 4.f3 (4.Nf3 d5 5.e5 Bg4=+) 4...e5 5.d4 (5.Bb5 Qg5 6.g3 Bc5–/+) 5...ed4–+ 6.Bd4 Nd4 7.Qd4 Qf6 8.Qf6 Nf6 9.Bc4 Be7 10.Ne2 d6 11.0–0 0–0 12.Bb3 (12.Rd1 Rd8–/+) 12...c5 (12...d5 13.Nd2–+) 13.Nd2 (13.c3 b5 14.cb4 c4–/+) 13...Be6 (13...b5 14.c4–+) 14.Be6 (14.Nf4!? Bd7 15.Rad1–/+) 14...fe6–+ 15.Nc4 (15.Nf4 Kf7–+) 15...d5 16.ed5 ed5 17.Ne5 d4 (17...Bd6 18.Nd3–+) 18.Rfe1 (18.Nf4 Ra6 19.Rfb1 Rfa8–+) 18...Bd6 (18...Nd5 19.Ng3–+) 19.Nc4 Bc7 20.Ng3 Nd5 21.Ne4 Rfe8 (21...b5 22.Ncd6 Rab8 23.Nc5 Bd6 24.Nd7–+) 22.h3 (22.Nb2 Ne3 23.Nc5 Rec8–+) 22...Nf6 (22...b5 23.Ncd2 c4 24.g3–+) 23.Nc5 (better is 23.a4 ba3 24.Nf6 gf6 25.Re8 Re8 26.Kf2–+) 23...Re1 24.Re1 Bg3 25.Re7 Re8?? (better is 25...Ra2 26.Nb3 Rc2–+) 26.Re8+= Ne8 27.Nb7 (27.Nb3 Bb8 28.a4 Ba7+/–) 27...Nc7 28.Nbd6 Nd5 (28...Bd6 29.Nd6 Kf8 30.Kf2+=) 29.Nf5 (29.Nb5 Nc3 30.Nd4 Na2+/–) 29...Bf4 (29...Bb8!?+=) 30.Nd4+/– Nc3 31.Kf2 Na2 32.g3 Bc7 33.Nb5 Bd8 34.f4 Nc3? (better is 34...Kf7!?+/–) 35.Nc3+– bc3 36.Ke3 Bf6 37.Kd3 h6 (37...h5 38.Ne3+–) 38.Ne5 Be5 (38...Bd8+–) 39.fe5 Kf7 40.Kd4 (better is 40.Kc3!? Ke6 41.Kd4 h5+–) 40...Ke6 41.Ke4 g5 42.g4 Kd7 43.Kf5 (43...Ke7 44.e6+–) 1–0. slavisa3 – ontherooks, Live Game Caissa's Web, 2004.

3.e4 d5 4.e5 c5 5.g3 (5.Nf3!?=+) 5...Nc6–/+ 6.Bg2 Nh6 7.Ne2 Ng4 (7...Bf5–/+) 8.0–0? (better 8.f4!?–/+) 8...Nge5–+ 9.d3 e6 10.Nd2 Be7 11.f4 Ng4 12.Rf3 Bf6 13.Rb1? (13.Bf6 Nf6 14.Qc1 b5–+) 13...Ra2 (13...Bb2!? 14.Rb2 Qf6 15.Rb1–+) 14.Bf6 Nf6 15.Ra1 Ra1 16.Qa1 0–0 17.Rf1 Qb6 18.Nf3 c4 19.d4 Ne4 20.c3 (20.Qd1 f6–+) 20...Nc3 (20...bc3!? 21.Rb1 Qa6 22.Qa6 ba6 23.Rb6–+) 21.Nc3 Nd4 22.Na4 Nf3 23.Kh1 Qa5 24.Bf3 c3 (better 24...Bd7 25.Nb2 Qa1 26.Ra1 Rc8–+) 25.Rc1 (25.Qa2 b6 26.Ra1–+) 25...Bd7 26.Bd1 (26.Be2 Ba4 27.Bd1 Ra8 28.Ba4 b5–+) 26...Ra8 27.Rc2 (27.Qa2 d4 28.Nc3 bc3 29.Qa5 Bc6 30.Kg1 Ra5–+) 27...Qa4 28.Qc1 (28.Qb1 Qa1 29.Rc1 Qb1 30.Rb1 d4–+) 28...Qa1 29.Qa1 (29.Kg2 d4 30.Kf2 b3 31.Qa1 Ra1 32.Rc3 dc3 33.Bb3 Rb1–+) 29...Ra1 30.Kg2 Rd1 31.Ra2 Rd2 32.Rd2 cd2 (32...cd2 33.Kf1 d1Q 34.Kf2 Qc2 35.Kf3 d4 36.f5 Bc6 37.Kg4 ef5 38.Kh3 g5 39.g4 Qd3) 0–1. workchess (2270) – pcmvr, net–chess.com, 2016.

3.Nf3 Nc6 =+.

3.Nf3 d5 4.e4 e6 5.ed5 ed5 6.Bb5 c6 7.Bd3 c5 (7...Nf6 8.Qe2 Qe7 9.0–0–/+) 8.0–0=+ d4 9.Re1 Be7 10.Bc4 (10.c3!?=) 10...Nf6=+ 11.Ng5 (11.Qe2!?=+) 11...0–0–/+ 12.Nf7 (12.c3!? Ng4 13.Nf7 Rf7 14.Qb3–/+) 12...Rf7–+ 13.Bf7 Kf7 14.c3 bc3 15.Qb3 (better 15.dc3 Nc6 16.Nd2–+) 15...Be6?? (better 15...Qd5 16.dc3 Qb3 17.ab3 Ra1 18.Ba1 Nc6–+) 16.Qe6+– Kf8 17.dc3 Qd6? (better 17...Nc6+–) 18.cd4 (18.Qc8 Qd8 19.Qb7 Nbd7+–) 18...Qe6 19.Re6 cd4 20.Bd4 Nc6 21.Bf6?? (21.Bb2 Nd5+–) 21...gf6? (better 21...Bf6 22.Rf6! gf6+–) 22.Nc3+– Kf7 23.Rae1 (better 23.Re2+–) 23...Nd4?? (better 23...Bb4 24.R6e3 Nd4+–) 24.Re7 Kg6 25.Ne4 (better 25.Rb7!? Ra3 26.Rc7 Ra6+–) 25...Ra2 26.Nd6 (26.Rb7 Rc2+–) 26...Nc2 (26...b5 27.h3 h5 28.Rb7+–) 27.Rf1 Nd4 28.Rb7 Ra6 29.Ne4 Kf5 (29...Ne2 30.Kh1+–) 30.Ng3 Kg5 (30...Kg6 31.f4 Ra5 32.Rb6+–) 31.Rh7 (better 31.Rg7!? Kh6 32.Rg4 Ne6 33.Nf5 Kh5+–) 31...Kg6 32.Rh8 Kg7 33.Rd8 Nf5 (33...Ne6 34.Rd7 Kg6 35.h4+–) 34.Rdd1 (better 34.Nf5 Kg6 35.g4 Ra4+–) 34...Kg6 35.Ne4 Ne7 36.Nc5 Ra5 37.Nd3 Nd5 38.Nf4! Nf4 39.g3 Ne2 40.Kg2 Ra4 41.Rfe1 Nd4 (41...Nc3 42.Rd8 Ne4+–) 42.Re4 Rc4 43.Red4 Rc7 44.Rd6 Rf7 (44...Rh7 45.h4+–) 45.R1d5 Kg7 46.Rc5 Kg6 47.Rcc6 Kg7 48.Re6 Kg6 49.f4 Kg7 50.g4 Kg6 (50...f5 51.g5+–) 51.f5 Kg5 52.Kg3 Kh6 53.h4 Kg7 54.Kf4 White prepares g5 54...Kh6 55.g5 Kg7 56.g6 Kh6 57.gf7 Kg7 58.f8Q! Kf8 (58...Kf8 59.Rc7 Mate attack). alessandrocarvalhaes (1875) – Legendid (1890), lichess.org, 2020.

3.Nf3 d6 4.e4 c5 (4...Nf6 5.e5 de5 6.Ne5–/+) 5.d4 cd4 6.Qd4 Nc6 7.Qd1 (7.Bb5 Bd7 8.Qd3 Nf6=+) 7...e5 8.Bb5 Bd7 9.0–0 Nf6 10.Nbd2 Be7 11.Re1 0–0 12.Qe2 Be6 13.Nc4 (13.a3 ba3 14.Ba3 Nh5–/+) 13...Na5 (13...Na7 14.a4–/+) 14.Ncd2 Qb6 15.Ng5 Bg4 16.Ngf3 Bf3 17.gf3 Nh5 18.Kh1 (18.a3!?–+) 18...Nf4 19.Qd1?? (19.Qf1 Bh4–+) 19...Bh4 (19...Qb5 20.a3–+) 20.Rg1 (20.Bd7–+) 20...Qb5 21.Nb3 (21.Rf1 Qd7 22.a3 Qh3–+) 21...Nc4 (21...Nh3 22.Kg2 Ng1 23.Kg1–+) 22.Bc1 (22.Qf1 Bf2 23.Qf2 Nb2–+) 22...Qb6 (better 22...Nh3 23.Qe2 Ng1 24.Kg1–+) 23.Bf4 ef4 24.Rf1 (24.Qd5 Ne5–+) 24...Ne5 (24...Bf6!? 25.Rc1–+) 25.Qd4 Qd4 26.Nd4 Nc6 27.Nc6 (27.Nb5 Bf6 28.Rac1 Ra2–+) 27...bc6 28.Rfd1 Bf6 29.Kg2 (29.Rab1 c5–+) 29...Be5 (better 29...Ba1!? 30.Ra1 f5 31.Rb1–+) 30.Rab1 c5 31.Rd5 Ra2 32.Rbd1 (32.Rd2 Bc3 33.Rd6 Rc2–+) 32...Rc2 33.Rd6 (33.R5d3–+) 33...Bd6 34.Rd6 b3 35.Rb6 b2 36.Kh3 c4 37.Kg4 c3 38.Kf4 Rc1 39.e5 b1Q 40.Rb1 Rb1 41.e6 (41.Ke4 c2 42.Kf4 c1Q 43.Kg4 Rb4 44.Kh3 Qg5 45.f4 Rb3 46.f3 Rf3) 41...c2 (41...fe6 42.Ke3 c2 43.f4 c1Q 44.Kf3 Qf4 45.Ke2 Rd8 46.h3 Qe4) 42.Ke5 (42.ef7 Rf7 43.Ke5 Re1 44.Kd6 c1Q 45.h4 Qc7 46.Kd5 Rd7) 42...fe6 (42...Re1 43.Kd6 Re6 44.Kc7 c1Q 45.Kb7 Qc6 46.Ka7 Ra8) 43.Ke6 (43.Kd6 c1Q 44.Kd7 Qd2 45.Ke7 Rf7 46.Ke6 Re1) 43...c1Q 44.f4 (44.Kd6 Qd2 45.Kc7 Qd5 46.f4 Rb7) 44...Qf4 (44...Qd2 45.f5 Re8) 45.Kd5 (45.Kd7 Rb6 46.h3 Qd6) 45...Qf6 (45...Rd8 46.Ke6 Qe4) 46.h4 (46.f4 Rd1 47.Kc5 Rb8 48.h3 Qc3) 46...Rf1 (46...Rd8 47.Ke4 Re1) 47.f4 (47.f3 Rd1 48.Kc5 Rb8 49.f4 Qc3) 47...Rf2 (47...Rd8 48.Kc5 Rb1 49.h5 Qc3) 48.h5 (48.Kc4 Qc6 49.Kd4 R8f4 50.Ke5 Re4) 48…Qf4 (48...Qf4 49.Kc6 Qc1 50.Kd5 Rd8 51.Ke5 Qe3; 48...Rd8 49.Kc5 Rb2 50.h6 Qc3) 0–1. alessandrocarvalhaes (1885) – Kaka_kaki (1845), lichess.org, 2020.

3.a3 ba3

4.Ra3 Ra3 5.Ba3 Nf6 6.e3 g6 (6...d6 7.d4–/+) 7.Be2 Bg7 8.Nf3 d6 9.0–0 Bg4 10.Ne1 Be2 11.Qe2 0–0 12.f4 Re8 13.Nf3 Ne4 14.Ng5 Ng5 15.fg5 c5 (15...Rf8 16.e4–/+) 16.Qc4 e6 17.d4? (17.Qb5 Qd7 18.Qb3 Nc6–/+) 17...d5 (better 17...Qg5!? 18.Bc1 Qd5 19.Qd5 ed5–+) 18.Qc5–/+ Qg5 19.Bc1 (19.Rf3 Qd8–/+) 19...Nd7 (19...Qe7!? 20.Qb6 Qd7–/+) 20.Qc7 Nf6 (20...Qd8 21.Qb7 Nf6 22.Ba3=+) 21.Na3 (better 21.e4!? Qh4 22.e5 Qd4 23.Kh1+=) 21...Rf8=+ 22.Nb5 Ng4 23.Qg3 (better 23.Rf3=+) 23...h5?? (better 23...Qh5=+) 24.h3+– Kh7? (24...Rc8 25.Nd6 Rc2 26.Nf7 Qf6 27.Rf6 Nf6 28.Qg6 Rc1 29.Kh2 Rc7+–) 25.hg4+– hg4 (25...h4 26.Qh3 Rc8 27.Rf7+–) 26.Nd6 (better 26.Ba3 Rc8 27.Rf7+–) 26...Rh8?? (26...Kg8+–) 27.Nf7 Qh6 (27...Qh5 28.Nh8 Kh8+–) 28.Nh6 (28.Nh6 Rf8 29.Rf8 Bf8 30.Nf7 Be7 31.Qc7 Bd6 32.Nd6 Kh6 33.e4 g5 34.Ne8 de4 35.Qg7 Kh5 36.Qg5) 1–0. Akrapovik – sicksauce, lichess.org, 2020.

4.Ra3 Ra3 5.Na3 e6 6.e3 Nf6 7.Bb5 c6 8.Bc4 (8.Be2 d5–/+) 8...d5 9.Bd3 Qb6 (9...Bd6 10.Nf3–/+) 10.Bd4 c5 11.Be5 (11.Bf6 gf6 12.Bb5 Bd7–/+) 11...c4 12.Be2 (12.Bb8 cd3 13.Nb1 Nd7–+) 12...Ba3 (better 12...Nbd7 13.Bd4 Qc6–+) 13.c3?? (13.Bb8 0–0–/+) 13...Be7 (13...Nc6 14.Bf6 gf6 15.f4–+) 14.Nf3?? (better 14.Bb8 0–0 15.Nf3–/+) 14...Nc6–+ 15.Bg3 (15.Bf4 Nd7–+) 15...0–0 (15...Ne4 16.Qc2–+) 16.h4 (16.Qc2 Qa5–+) 16...Ne4 17.Be5 (17.Bh2 f6–+) 17...Ne5 18.Ne5 Qd6 19.g4 (19.Nf3–+) 19...Qe5 20.g5 (20.Qc2 Bd7–+) 20...Qf5 21.Bg4 (21.Rh2–+) 21…Qf2 0–1. Agiant (1620) – Nkalanzinzi, lichess.org, 2019.

4.Ba3 Na6 5.Bb2 (5.e4 d6–/+) 5...Nf6–/+ 6.e3 g6 (6...d5 7.Nf3–/+) 7.Nf3 (7.Bf6 ef6 8.d4 d5=+) 7...Bg7–/+ 8.Be2 0–0 9.0–0 Ne8 (better 9...c5!?–/+) 10.Bg7= Ng7 11.d3 (11.d4 d6=) 11...b6 (11...d5 12.d4=+) 12.Nbd2 Bb7 13.c4 (13.d4 d6=) 13...Nc5 (13...d6 14.d4=+) 14.Qc2= Qb8 (14...f5 15.d4 Ne4 16.Ra8 Qa8 17.Nb3=) 15.Rab1 (15.d4 Nce6=) 15...Nce6 16.Qb3 (16.d4 Qa7=) 16...Ra5 17.Qb4 Qa8 (better 17...Nf5=+) 18.Ne4 (18.Qe7 Re8 19.Qf6= (19.Qd7? Bc6 20.Qe8 Qe8–+)) 18...Be4–/+ 19.de4 Nc5 (19...Qe4 20.Qe7 Ra2 21.Rbe1–/+) 20.Nd4 (20.e5!?–/+) 20...Qe4–+ 21.Bf3 (21.Ra1 Ra1 22.Ra1 Ra8–+) 21...Qe5 (21...Qh4 22.Rbd1–+) 22.Be2 (22.Ra1 Nf5 23.Ra5 ba5 24.Qa5 Ne3–+) 22...Nge6 23.Nf3 (23.Rfd1 Rfa8–+) 23...Qf6 24.Qd2 (24.Rfd1 Ra2 25.Qe1 Rfa8–+) 24...Ng5 (24...Rfa8 25.Rb2–+) 25.Qd1 (25.Ng5 Qg5 26.Bf3 Ra4–+) 25...Nf3 (25...Nge4 26.Qc2–+) 26.Bf3 Qd6 (26...e5 27.Qc2–+) 27.Bd5 (better 27.Qd6 ed6 28.Rfd1–+) 27...e6 28.Bf3 Qd1 29.Rfd1 Rd8 (29...e5 30.Bd5–+) 30.Ra1 (30.Rb2 e5–+) 30...Ra1 31.Ra1 Kf8 (31...c6 32.e4–+) 32.Ra7 (32.e4 Ke7–+) 32...Rc8 (32...c6 33.Kf1–+) 33.Ra8 (33.g4–+) 33...Ra8 34.Ba8 Ke7 35.Be4 (35.h4 Kd6 36.Bf3 Nd3–+) 35...c6 (better 35...Ne4 36.f4 Kd6–+) 36.Bc2 (36.Bb1 Nb3–+) 36...Kd6 37.Kf1 b5 (37...Nb7!? 38.Ke2 Kc5 39.g4–+) 38.cb5 cb5 39.Ke2 (39.Ke1 b4–+) 39...b4 40.Kd2 Kc6 41.Kc1 (41.g4 f5 42.f3 d5–+) 41...d5 42.Kd2 (42.Bb1 Kb5–+) 42...Kb5 43.f3 Kc4 Black plans b3 44.Kc1 (44.Bd1 b3–+) 44...b3 45.Bb1 (45.Kd2 bc2 46.Kc2 Nd3–+) 45...Kc3 46.g4 (46.h3 Nd3 47.Kd1 Nf2 48.Ke1 Kb2 49.Bg6 hg6 50.Kf2 Kc3–+) 46...b2 (better 46...Nd3 47.Kd1–+) 47.Kd1 Nb3 48.h4 Nd2 49.h5 (49.Ba2–+) 49...Nb1 50.hg6 (50.Ke1 Nd2 51.hg6 b1Q 52.Kf2 Qf1 53.Kg3 Qf3 54.Kh2 Nf1 55.Kg1 Ne3 56.gf7 Qg2) 50…Nd2 (50...Nd2 51.Ke1 b1Q 52.Kf2 Qf1 53.Kg3 Qf3 54.Kh2 Nf1 55.Kg1 Ne3 56.gf7 Qg2) 0–1. tonyclifton (1645) – FeegLood (2840), lichess.org, 2015.

4.Ba3 c6 5.e3?? (5.Be7!? Ra1 6.Bd8 Kd8 7.Nf3+–) 5...Qa5 (5...d6 6.d4–/+) 6.c3 (6.Bb2 Qa1 7.Ba1 Ra1+=) 6...Nf6 (6...Qa4 7.Qa4 Ra4 8.d4=+) 7.Qb3 (7.Bb2 Qa1 8.Ba1 Ra1=) 7...g6 (7...Qf5 8.d4–/+) 8.Nf3 (8.Bb2 Qa1 9.Ba1 Ra1+=) 8...Bg7 (8...Qa4 9.Qb6 Qa7 10.Qb3=+) 9.Be2 (9.Bb2 Qa1 10.Ba1 Ra1+=) 9...0–0 (9...Na6 10.d4=+) 10.0–0 (10.Bb2 Qa1 11.Ba1 Ra1+=) 10...b5 (10...Qf5 11.c4=+) 11.d4 (11.Bb2 Qa1 12.Ba1 Ra1+=) 11...Ne4 (better 11...Na6=) 12.Be7?? (better 12.Bb2 Qa1 13.Ba1 Ra1 14.c4+–) 12...Qa1–+ 13.Bf8 Bf8 14.Ne5 (14.Bd3 Nf6–+) 14...Qa2 15.Qd1 Ra3! 16.Bd3 (16.Na3 Qb2 Double attack (16...Qb2 Decoy)) 16...Nc3 17.Nc3? (17.Qf3 Qe6 18.Na3 Ba3 19.Ra1–+) 17...Rc3 18.Qf3 Bg7 (better 18...d6 19.Bb1 Qe6–+) 19.Ng4?? (better 19.Bc4! Qc4 20.Nc4 Rc4 21.Qe4=+) 19...d5 (better 19...Rd3 20.Nf6 Bf6 21.Qf6–+) 20.Bb1 (20.Nf6 Kh8 21.Ne8 Be6 (21...Rd3?? 22.Qf7 Qa7 23.Qa7+–) 22.Ng7 Kg7–+ (22...Rd3 23.Ne6 Kg8 24.Qf6 fe6 25.Qe6 Kf8 26.Qd6 Kf7 27.Qc7 Ke6 28.Qb8+–)) 20...Bg4 21.Qg4 (21.Ba2?? Bf3 22.gf3 f5–+) 21...Qa1 (better 21...Qa3–+) 22.Qc8=+ Bf8 23.Qb8 Qb2 24.h3 Rc1 25.Bd3 Qd2 26.Rc1 Qc2?? (better 26...Qc1 27.Bf1 b4–/+) 27.Bc2 Kg7 28.Qe5 (28.Qe5 f6 29.Qc7 Kg8 30.Ra1 b4 31.Ra7 Be7 32.Qe7 c5 33.Qe8) 1–0. Akrapovik – kkkkkkkkkkkkkkk111, lichess.org, 2018.

4.Ba3 Nc6 5.Bb2?? Ra1–/+ 6.Ba1 e6 (6...e5 7.e3–/+) 7.Nf3 Nf6 8.d4 (8.e3 Bc5–/+) 8...Bb4 (8...d5 9.e3–/+) 9.c3 (9.Bc3 Be7–/+) 9...Be7 10.e3 0–0 11.Bd3 b6 (11...d6 12.0–0–/+) 12.0–0 Bb7 (12...d5 13.Bb2–/+) 13.Qc2 (13.e4 Qa8 14.Nbd2 Nh5–/+) 13...Qa8 14.Ng5?? (better 14.Nbd2–/+) 14...h6 (better 14...Qa1 15.Nd2 Qa5 16.Nh7 Nh7 17.Bh7 Kh8 18.Be4–+) 15.Ne4? (15.Nh7 Nh7 16.Bh7 Kh8 17.Nd2–+) 15...Ne4 16.Be4 Qa1 17.Nd2 Qa8 (17...Qa5 18.Nc4 Qh5 19.Bf3–+) 18.Nf3 (18.Rb1 f5 19.Bf3 f4–+) 18...Na5 (better 18...f5 19.Bd3–+) 19.Bh7 (19.Bb7 Qb7 20.c4 c5 21.dc5 Rc8 22.cb6 Nc4–+) 19...Kh8 20.Bd3 Bf3 21.gf3 Qf3 22.e4 (22.c4 c5 23.dc5 bc5–+) 22...Qg4 (22...c5 23.Qe2 Qe2 24.Be2 cd4 25.cd4–+) 23.Kh1 Qf3 24.Kg1 Bg5 25.Qe2 (25.Be2 Qf4–+) 25...Qe2 26.Be2 Ra8 (26...Bd2 27.c4–+) 27.Bf3 (27.f4 Be7–+) 27...Nc6 (27...Bd2 28.Ra1 Bc3 29.Rc1 Bd4 30.Rc7–+) 28.Kg2 (28.Be2 Bd2 29.d5 Ne5–+) 28...Ra3 (better 28...Bd2 29.d5 Ne5 30.d6 cd6 31.Rb1–+) 29.h4 (29.e5 Bd2 30.Bc6 dc6–+) 29...Bh4 30.Kh3 (30.Rc1 Ra2 31.Rf1 Rc2–+) 30...Rc3 31.Kg4 (31.Kh4 Rf3 32.d5 Ne5–+) 31...Rf3! 32.Kf3 Nd4 33.Kg4 (33.Ke3 c5 34.Rh1–+) 33...e5 (better 33...g5–+) 34.Kh4 g6 35.f4 (35.Ra1 Kg7–+) 35...Kg7 (better 35...ef4 36.Kg4 f3 37.Kg3–+) 36.fe5 Ne6 (better 36...Nc6 37.Rc1 Kf8–+ (worse 37...Ne5 38.Rc7 b5 39.Rb7–+)) 37.Kh3 (37.Rd1 g5 38.Kg4 Kg6–+) 37...Nc5 (37...Ng5 38.Kg3 Ne4 39.Kf4–+) 38.e6 (38.Rd1 f6–+) 38...Ne6 (38...fe6 39.Rd1–+) 39.Rc1 (39.Kg3 b5–+) 39...Ng5 (39...Kf6 40.Kg2 Ke5 41.Kf3–+) 40.Kg4 (40.Kg2 Ne4 41.Rc7 Nc5–+) 40...c5 (better 40...Ne4!? 41.Rc7 h5 42.Kf3–+) 41.Kf4 Ne6 (41...Kf6 42.e5 Ke6 43.Rh1–+) 42.Ke5 Kf8 (42...b5 43.Kd6–+) 43.Kd5 (43.Kd6–+) 43...Ke7 44.e5 (44.Rh1 h5–+) 44...Nc7 45.Ke4 Ke6 (45...d5 46.ed6 Kd6 47.Rd1 Ke7 48.Ke5–+) 46.Rb1 (46.Rh1 h5–+) 46...Ne8 (better 46...b5 47.Rh1 h5 48.Rf1 d5 49.ed6–+) 47.Rb6 d6 48.Rd6 (48.Rb8 Ng7 49.ed6–+) 48...Nd6 49.ed6 Kd6 50.Kd3 Ke6 (better 50...Kd5 51.Kc3–+) 51.Ke3 Kd6 (better 51...Kd5!? 52.Kd3–+) 52.Kd3 Kd5 53.Kc2 f5 54.Kd2 g5 55.Ke2 h5 56.Kf2 h4 57.Kg2 g4 58.Kh2 f4 59.Kg2 Ke4 60.Kf2 c4 61.Ke2 c3 62.Kd1 Kd3 63.Kc1 f3 64.Kb1 g3 (64...f2 65.Ka2 Kc4 66.Ka3 f1Q 67.Ka2 Qf2 68.Kb1 Qb2) 65.Ka2 h3 (65...Kc4 66.Ka3 g2 67.Ka2 g1Q 68.Ka3 Qa7) 66.Ka3 h2 67.Kb4 g2 68.Kc5 f2 (68...g1Q 69.Kd5 h1Q 70.Kc6 Qh6 71.Kb5 Qhb6 72.Ka4 Qa1) 69.Kd5 (69.Kb5 f1Q 70.Kb6 g1Q 71.Kb5 Qf5 72.Ka4 Qb6 73.Ka3 Qfa5) 69...h1Q (69...g1Q 70.Kc5 f1Q 71.Kb5 Qf5 72.Ka4 Qb6 73.Ka3 Qfa5) 70.Ke5 (70.Kc6 g1Q 71.Kc5 f1Q 72.Kd6 Qf7 73.Ke5 Qhd5) 70...g1Q (70...f1Q 71.Kd6 Qf6 72.Kc5 g1Q 73.Kb4 Qb1 74.Ka3 Qa8) 71.Kf4 (71.Kd6 Qg6 72.Kc5 Qgc6 73.Kb4 Qhe4 74.Kb3 Qca4) 71…f1Q (71...f1Q 72.Ke5 Qd4 73.Ke6 Qhe4; 71...Qe4) 0–1. winstonsmithamm (1880) – FeegLood (2730), lichess.org, 2017.

4.Ba3 d6 5.e3 Bd7 (5...e5 6.d4 e4 7.Nd2–/+) 6.Bb2 (6.d4 Nf6–/+) 6...Ra1 7.Ba1 e5 8.Nf3 Bc6 9.Be2 h6 (9...Nf6 10.0–0–/+) 10.0–0=+ g5 (10...Nf6 11.c4=+) 11.Ne1 (11.d4 Bg7=) 11...Rh7 (11...Bg7 12.d4=+) 12.f4 gf4 13.ef4 Qh4 (better 13...e4!?=+) 14.fe5 de5 15.Be5 Qg5 (15...Bd6!? 16.Nf3 Bf3 17.Bd6 Qd4 18.Rf2 Qd6 19.Bf3 c6+–) 16.Bc7 Qg2?? (better 16...Rg7 17.Rf2 Nd7+–) 17.Ng2 Rg7 18.Rf2 (18.Bb8?? Rg2 19.Kh1 Re2 20.Rf3 Bf3 21.Kg1 Rg2 22.Kf1 Bd1 23.Kg2 Bc2–+) 18...Bc5 (18...Nd7 19.Bf3 Ne7 20.d4+–) 19.d4 Bb6 (19...Ba7+–) 20.Bb6 Bg2 21.Rg2 Nf6 22.Rg7 Ne4 1–0. Akrapovik (1605) – alessandrotsyupa (1615), lichess.org, 2020.

4.Na3 b5 5.e4 b4 6.Nb5 Ra1 7.Ba1 c6 8.Nd4 Ba6 9.Ba6 Na6 10.Ngf3 Nf6 11.d3 Qb6 12.0–0 g6 13.Ng5 Bh6 14.Ngf3 c5 15.Nb3 0–0 16.c3 bc3 17.Bc3 d6 18.e5 Nd5 19.Ba1 Nab4 20.ed6 ed6 21.d4 c4 22.Nbd2 c3 23.Ne4 c2 24.Qe2 c1Q 25.Rc1 Bc1 26.h3 Nf4 27.Qd1 Nbd3 28.d5 f5 29.Neg5 Qf2 0–1. guest1181 – guest1287, ICS blitz, 2000.

4.Na3 c6 5.e3 d5 6.Bd3 f6 (6...Nd7 7.Nf3–/+) 7.h4 (7.Qh5!? Kd7 8.Bf5 e6 9.Qf7 Qe7 10.Be6 Kd8 11.Qe7 Be7 12.Bc8 Kc8 13.Nf3=) 7...e5 (7...Nh6 8.f4–/+) 8.h5 (better is 8.Qh5!? Ke7 9.Bh7+=) 8...Be6 9.f3 Nd7 10.g4 Bd6 11.Nc4?? (better is 11.Ne2–+) 11...dc4 12.Ra8 Qa8 13.Bf5 Bf5 14.gf5 Nh6 15.Ne2 0–0 16.f4 Nc5 17.Rg1 Qe8 18.Nc3 ef4 19.Qf3 fe3 20.de3 Be5 21.Ke2 Qd7 22.e4 b5 23.Bc1 Kh8 24.Bh6 gh6 25.Qe3 Bc3 26.Qc3 Qd6 27.Qe3 Qe5 28.Kf3 Re8 29.Rg4 Rg8 30.Rg8 Kg8 31.c3 Kf7 32.Qd2 Qe4 33.Kf2 Qf5 34.Ke1 Qe4 35.Kd1 Qd3 36.Qd3 cd3 37.Kd2 f5 38.Ke3 Kf6 39.Kd2 If White now would get f4 in, he might survive 39...Ke5 40.Ke3 f4 41.Kd2 Ke4 42.Ke1 Ke3 43.Kd1 f3 44.Ke1 f2 45.Kf1 d2 46.c4 b4 47.Kg2 d1Q 48.Kg3 f1Q 49.Kh4 Qf4 50.Kh3 Qh1# (50...Qdf3#) 0–1. xtom – paul49 (1645), kurnik, 2011.

4.Na3 Nc6 5.e3 b6 6.h4 Bb7 7.g4 h6 8.f3 Nf6 9.Nb5 Ra1 10.Qa1 Nb4 11.Qa4 e6 12.c3 Na6 13.Bd3 (better is 13.e4!?–+) 13...Nc5 14.Qc4? (14.Qc2 Ng4! 15.c4 Be7 16.Bg7 Nd3 17.Qd3 Bh4 18.Ke2 Nf2–+) 14...d5 (better is 14...c6 15.Qd4 Nd3 16.Qd3 cb5 17.e4–+) 15.Qd4 c6 (15...Nd3?! 16.Qd3 c6 17.Nd4–+) 16.Na3 Nb3 17.Qa4 Nc5 18.Qa7?? Nd3–+ 19.Ke2 Nc5 20.d4 Ba6 21.c4 Bc4 22.Nc4 Ncd7 23.Nd2 b5 24.e4 de4 25.fe4 Bb4 26.Rh3 Ng4 27.Rg3 Qh4 28.Kf3 h5 29.Qa8 Qd8 30.Qc6 Qb6 31.Qc8–/+ Qd8 32.Qd8?? Kd8–+ 33.Nb3 Bd6 34.e5 Be7 35.Ne2 Kc7 36.Nf4 g6 37.Bc3 Ra8 38.Ba5 Kc6 39.Nd3 Bh4 40.Rg2 Nb6 41.Rc2?? Nc4 42.Nb4 Kd7 43.Nc5 Ke7 44.Nc6 Kf8 45.Nd7 Kg7 46.Bd8 Bd8 47.Nd8 Rd8 48.Nc5 Nce5! 49.de5 Ne5 50.Ke4 Nc6 51.Rf2 Rd4 52.Ke3 Rd5 53.Ne4 Re5 54.Kf4 f6 55.Nd6 Rf5! 56.Ke3 Rf2 57.Kf2 Ne5 0–1. xtom – autentyczny, kurnik, 2011.

4.Na3 e6 5.e3 Ba3?? 6.Bg7+– (6.Ra3?! Ra3 7.Bg7 d6=; 6.Ba3 d6=+) 6...Qe7 (6...Nf6 7.Bh8 d5 8.Nf3+–) 7.Bh8 f6 8.Qh5 Qf7 9.Qf7 (9.Qh3 h6+–) 9...Kf7 10.Nf3 Nh6 (10...Nc6 11.Bd3 h6 12.0–0+–) 11.Bd3 Nc6 12.0–0 (12.Bh7!? b5 13.Nh4 Bb7 14.Bg6 Ke7+–) 12...b6 13.Bh7 Nb4 (13...Bb7 14.Be4+–) 14.Rfb1 Nc2 (14...Bb7 15.Nh4 Nd5 16.Ng6+–) 15.Ra2 (better 15.Bc2!? Bb7 16.e4 Ng4+–) 15...Nb4 (15...Ne3 16.fe3 Bb7+–) 16.Rb4! Bb4 (16...Bb7 17.Rh4 Rh8 18.Rh6+– (18.Ra3?! Rh7 19.e4 Bc6+–)) 17.Ra8 Bb7 18.Rg8 (better 18.Ra7 Bf3 19.gf3+–) 18...Ng8= 19.Bg8 Kg8 20.Bf6 Bf3 21.gf3 Bd2 22.Bd4 (22.Kf1 b5–/+) 22...Kf7 23.Kf1 Bb4 24.Ke2 (24.Be5 c5–/+) 24...Kg6 (24...Be7 25.Bb2–/+) 25.Kd3 (25.Be5 d6 26.Bf4 b5–/+) 25...c5 26.Bb2 Kf5 (26...b5 27.f4–+) 27.Kc4–/+ d5 28.Kb5 Ba5 29.Ka4 (29.Bc1 Kg5–/+) 29...c4 (29...Be1 30.Kb5 Bf2 31.Bc1–+) 30.Bc1 e5 31.e4 (31.Kb5 Be1 32.Kb6 Ke6–/+) 31...de4–+ 32.fe4 Ke4 33.Be3? (better 33.h4–+) 33...c3 34.Kb3 (34.Bc1 Kd3–+) 34...Kd3 35.h4 c2 36.h5 (36.Bc1 Bd2 37.Ba3–+) 36...Bd2 37.Kb2 c1Q 38.Kb3 Qc3 39.Ka4 (39.Ka2 Kc2 40.Bd2 Qb2) 39...Qa5 (39...Qb4) 40.Kb3 Qb4 41.Ka2 Bc3 (41...Kc2 42.Bd2 Qa4) 42.h6 (42.Bc1 Kc2 43.h6 Qb3) 42…Qb2 0–1. Akrapovik (1670) – bercatur (1685), lichess.org, 2021.

4.Na3 e6 5.e3 f6 6.Qh5 g6 7.Qf3 c6 8.Nc4 (8.Qd1 d5–/+) 8...Ra1 9.Ba1 d5 10.Nb2 Be7 (better 10...e5–/+) 11.Be2?? (better 11.Qd1–/+) 11...Qa5–+ 12.Nd1 Qa1 13.Nh3 (13.e4 Qb1 14.Bd3 Nd7–+) 13...e5 14.0–0 (14.c3 Nh6–+) 14...e4 (14...Qc1 15.Bd3–+) 15.Qf4 (15.Qg3 Qe5–+) 15...Nd7 (15...Qe5 16.Qh4–+) 16.Qc7 (16.d4 ed3! 17.cd3 Ne5–+) 16...Qa8 17.Nf4 Qb8 18.Qa5 Nh6 (18...Bd6 19.g3–+) 19.Ne6 (19.f3 Qe5–+) 19...b6 20.Qa2 (20.Qc3 Qd6 21.Nd4 Ne5–+) 20...Nc5 (better 20...Bd6 21.Nd4 Bh2 22.Kh1 c5–+) 21.Ng7 (21.Nc5 Bc5 22.d3–+) 21...Kf7 22.Nh5 gh5 23.Bh5 Kg7 24.f4 Be6 25.f5 (25.Qb2 Rg8–+) 25...Bg8 (25...Bf5 26.Be2–+) 26.Nf2 (26.Be2 Bd6 27.g3 Qd8–+) 26...Nf5 (26...Bd6 27.Nd1 Bh2 28.Kh1–+) 27.Ng4 (27.Nh3 d4 28.Qa1 Qe5–+) 27...d4 (better 27...Be6!? 28.Qb2–+) 28.Qb2 Be6 29.ed4 Na4 30.Qa1 b5 31.d5 (31.c3 Qd6 32.Qe1–+) 31...Ng3! 32.hg3?? Increases the pressure on the backward pawn (32.Rf6 Nc3 33.Rf7 Bf7 34.Qc3 Kf8 35.Qh8 Bg8 36.hg3 Qg3 A) 37.dc6?? Qe1 38.Kh2 Bd6 39.g3 Qg3 40.Kh1 Qh3 41.Kg1 Bc5 (41...Qh5?! 42.Qg8 Kg8 43.Nf6 Kg7 44.Nh5 Kg6 45.Kf2 Kh5 46.Ke3–+) 42.Ne3 Qh5 43.Qf6 Ke8–+; B) 37.Qa1–/+) 32...Bd5 (better 32...Bg4 33.Bg4 Qg3–+) 33.Nf6 (better 33.Rf6 Qf8 34.Rf8 Kf8 35.Qh8 Bg8 36.Nf6 Bc5 37.Kf1+–) 33...Qb6?? (better 33...Kh6 34.Ng4 Kh5–+) 34.Kh2+– Bf6 (34...Nc3 35.Qc3 Kh6 36.Ng4 Kh5 37.Qg7 Qg1 38.Kg1 Rf8 39.Rf8 Bf7 40.Qf7 Kg4 41.Qf5 Kg3 42.Qf4) 35.Qf6 Kg8 36.Qf8 (36.Qg5) 1–0. Akrapovik (1620) – PapsM (1630), lichess.org, 2020.

4.Na3 e6 5.e3 Nf6 6.h4 Ba3 7.Ba3 d6 8.Bb2 Ra1 9.Qa1 Nc6 (9...Nbd7 10.g4 Ng4 11.Bg7–/+) 10.Bd3 Bd7 11.h5 h6 12.Nf3 (12.Bf6!? Qf6 13.Qf6 gf6 14.Nf3–/+) 12...e5–+ 13.Nh4 0–0 14.f4 Qa8 15.Qd1 (15.fe5 Qa1 16.Ba1 de5–+) 15...Bg4 16.Be2 Be2 17.Qe2 (17.Ke2 Qa2 18.Qb1 Qe6–+) 17...Qa2 18.Bc1 (18.Bc3 Ne4 19.0–0 Qc2–+) 18...Qb1 (18...ef4 19.Qb5–+) 19.Kf2 (19.0–0 Qc2 20.fe5 Ne5–+) 19...Qc2 (19...ef4 20.ef4 Qc2 21.g3–+) 20.f5 (20.d3 Qe2 21.Ke2 ef4 22.ef4 Nd4 23.Kd1–+) 20...Ne4 21.Kf3 Ng5 22.Kf2 Nb4 23.g4 Nd3 24.Kg3 Nc1 25.Rc1 Qc1 26.Nf3 Nf3 27.Kf3 Qh1 28.Kg3 e4 29.Qc4 Qf3 30.Kh2 Qg4 31.Kh1 Qh5 32.Kg2 Qf5 33.Qc7 Qf3 34.Kh2 Qe2 35.Kg3 Qd2 36.Kf4 Qf2 37.Ke4 Re8 38.Kd5 Qe3 39.Kd6 Qe5 40.Kd7 Re7 41.Kc8 Qc7# 0–1. xtom – capitanjack (1670), kurnik, 2012.

4.Na3 Nf6 5.e3 d5 6.g4? Bg4–+ 7.f3 Bd7 8.e4 (8.f4 e6–+) 8...de4 9.fe4 Ne4 10.Bd3 Nf6 11.Nf3 Nc6 12.0–0 h5 13.Ng5 (13.Nc4 Ra1 14.Qa1 Nb4–+) 13...e6 14.Qf3 (14.Ne4 Ne4 15.Be4 Qh4–+) 14...Bc5 15.Kh1 Nd4 (better 15...Ba3 16.Ra3 Ra3 17.Ba3 Ne5–+) 16.Qb7 (16.Bd4 Bd4 17.c3–+) 16...Bc6 17.Qc6 Nc6 18.Bf6 (18.Ne4 Bd4 19.Bd4 Qd4–+) 18...gf6 (18...Ba3?! 19.Bd8 Nd8 20.Rf3–/+) 19.Rf6 (19.Be4 fg5 20.Bc6 Ke7 21.Nb5 Ra1 22.Ra1 Qd2 23.Be4–+) 19...Qf6 20.Ne4 Qa1 (20...Qf3) 21.Kg2 (21.Nb1 Qb1 22.Kg2 Qg1 23.Kf3 Qg4) 21...Ra3 (21...Qg1 22.Kf3 Qg4) 22.Nc5 (22.Bf1 Qd4 23.Nf6 Qf6 24.Bd3 Qg5 25.Kf1 Ra1 26.Ke2 Qg4) 22...Qg1! 23.Kg1 Rg8 24.Kf2 Ne5 25.Ne4 (25.h3 Nd3 26.Nd3 h4–+) 25...Nd3 26.Ke3 (26.cd3 Ke7 27.Ke3 Rg2–+) 26...Nc1 (better 26...Nc5 27.c3 Ne4 28.Ke4–+) 27.Kd4 Ra4 (better 27...Rg4 28.d3 f5 29.h3–+) 28.Kc3 Ne2 (better 28...Re4 29.h4 Ne2 30.Kb3–+) 29.Kd3 Nf4 30.Ke3 e5 (better 30...Ng2 31.Kd3 Ne1 32.Ke3 Nc2 33.Kd3 Nb4 34.Ke2–+) 31.Nf6 Kf8 32.Ng8 Kg8 33.Kf3 Kg7 34.Kg3 1–0. Agiant – HUNHoUNd, lichess.org, 2019.

4.Nf3 ab2 5.Ra8 Nc6 6.d4+=.

4.Nf3 Nf6 5.e3 Nc6 6.Nc3 (6.Ra3!? Ra3 7.Ba3–/+) 6...e5–+ (6...ab2 7.Ra8 e5 8.Qb1+=) 7.Ne5? (better is 7.Nb5 e4 8.Ng1–+) 7...Ne5 (8.Nb5 Ng6–+ (8...ab2?! 9.Ra8 Nd5 10.Ra2–+); 7...ab2?! 8.Ra8 Ne5 9.Qb1–+) 0–1. Deneuville,Christian – van Rooijen,Peter, corr or02–026, 2003.

3.c3 bc3

4.Bc3 b5 5.Qb3 (5.e4 c6–/+) 5...Ba6 (5...c6 6.a4 ba4 7.Ra4 Ra4 8.Qa4–/+) 6.a3 (6.e4 c6=+) 6...e6–/+ 7.e3 c6 8.Nf3 f6 (8...Nf6 9.d4–/+) 9.Be2 d5 10.Nd4 (10.d4 Bd6=+) 10...Qc8 (10...Bc8!?–/+) 11.Bh5=+ g6 12.Bg4 f5 (12...Nd7 13.Be6 Nc5 14.Bc8 Nb3 15.Ba6 Nd4 16.Bd4 Ra6 17.Bb2=+) 13.Be2 (better 13.Ne2 fg4 14.Bh8+–) 13...Bg7?? (13...e5 14.Nf3 Nf6=) 14.0–0?? (better 14.Nf5 Bc3 15.Nd6 Kf8 16.Qc3+– (16.Nc8?! Ba1 17.Nb6 Ra7+–; 16.dc3?! Qd7 17.Qb4 Kg7=; 16.Nc3?! Qd7 17.Qb4 Kg7+–)) 14...Ne7?? (14...Nf6 15.Nf3=+) 15.f4 (15.Nc6!? Nbc6 16.Bg7+–) 15...c5 (better 15...0–0!?=+) 16.Nb5 Bb5 (16...0–0 17.Bg7 Kg7 18.Qc3 Kg8 19.a4+=) 17.Qb5 (better 17.Bb5 Kf7 18.Bg7 Kg7 19.Rc1+–) 17...Nd7?? (better 17...Kf7+=) 18.Bg7+– Rg8 19.Bh6 Rb8 20.Qa4 Qb7 21.Bg5 (21.Nc3 Qb3+–) 21...Nc6? (21...Qb2 22.Nc3 Qd2+–) 22.Nc3 Nb6 23.Qb5 h6 (23...Nd7 24.Rfb1 Qa8 25.Qd3+–) 24.Bf6 (24.Bh6 Nd7+–) 24...g5 (24...Nd7 25.Qb7 Rb7+–) 25.Be5 Ra8 (25...Nd7 26.Bb8 Qb5 27.Bb5 Ndb8 28.a4+–) 26.Bh5 (26.Rfb1!? Kd8 27.Bd6 Na7 28.Qb6 Qb6 29.Rb6 Nc8+–) 26...Kd7 (26...Kd8 27.Rab1 Ne5 28.fe5+–) 27.Rfb1 Ra6 28.d3 (28.Na4! Ra4 29.Qa4 gf4 (29...Na4?? 30.Rb7 Kd8 31.Rab1+–) 30.ef4 Qa8 (30...Na4 31.Rb7 Kd8 32.Rab1+–) 31.Qa8 Na8 32.Rb7 Kc8+–) 28...gf4 (28...Qa8+–) 29.Bf4 d4 30.ed4 (30.Qc5 Kd8 31.Nd5 ed5 32.Rb6 Rb6 33.Qd5 Kc8 34.Qg8 Nd8 35.Qc4 Rc6+–) 30...cd4 31.Ne2 Kc8 (31...Qa7 32.Bf7 Rg4 33.Be6 Ke6 34.Qc6 Kf7 35.Qc5+–) 32.Rc1 (better 32.Bf3 Ra5 33.Qb6 Qb6 34.Rb6+–) 32...Nd5 33.Be5 (33.Qc5 Kd8+–) 33...Rb6 (better 33...Qb5 34.Nd4 Qd3 35.Nc6 Kb7–+) 34.Qc5+– Nde7 (34...Kd8 35.Bg3 Qe7+–) 35.Nd4 Kd8 (35...Rd8 36.Bf3 Rd5 37.Bd5 ed5 38.Re1+–) 36.Bf6 (36.Bf3 Ke8+–) 36...Kd7 (36...Ne5 37.Be7 Kd7 38.Nf3 Nf3 39.Bf3 Qf3 40.Bg5 Rg5 41.Qc8 Ke7 42.Rc7 Kd6 43.Rd7 Ke5 44.Re1 Qe4 45.de4+–) 37.Be7 (37.Bf3 Rb2 38.Nc6 Rgg2 39.Kf1 Rbf2 40.Ke1 Re2 41.Be2 Re2 42.Ke2 Ke8+–) 37...Ne7 (37...Nd4 38.Qd4 Ke7 39.Bf3+–) 38.Bf3 Nd5 (38...Qb8 39.Bc6 Nc6 40.Nc6 Rc6 41.Qc6 Ke7 42.Rab1+–) 39.Re1 (39.Ne6 Rd6 40.Rab1 Qa8+–) 39...Rg2 (39...Rc8 40.Bd5 Rc5 41.Bb7 Rb7 42.Ne6 Rc3+–) 40.Bg2 Rb5 (40...Qc8 41.Qc8 Kc8 42.Bd5 ed5 43.Nf5 Rg6 44.Kf2+–) 41.Qc4 (better 41.Nb5 Qb6 42.Qb6 Nb6 43.Nd4+–) 41...Ne3 42.Re3 (42.Qe6 Kd8 43.Bb7 f4 44.Nb5 f3 45.Qf6 Kd7 46.Bc6 Kc8 47.Qf8) 42...Qg2 43.Kg2 Rd5 (43...Rb6 44.Re6 h5 45.Qd5 Rd6 46.Rd6 Kc7 47.Rd7 Kb6 48.Qb5) 44.Qc6 Ke7 (44...Ke7 45.Qe6 Kd8 46.Qd5 Kc7 47.Re7 Kb6 48.Qb5). Akrapovik (1610) – ss1371yykk, lichess.org, 2020.

4.Nc3 c6 5.e3 d5 6.Bd3 e5 7.Nge2 e4 (7...Nf6 8.0–0–/+) 8.Bc2 Nf6 9.0–0 Bg4 10.Qb1 (10.d3 Ba3 11.Qc1 Qe7–/+) 10...Bd6 11.Ng3 Nbd7 12.h3 Be6 13.Nce2 0–0 14.f3 (better 14.d3 ed3 15.Bd3–/+) 14...Ra7 (better 14...Qa5–+) 15.fe4= de4 16.Be4 (16.Ne4 Ne4 17.Be4 Qh4=) 16...Ne4 17.Ne4 Be5 18.Be5 Ne5 19.a4 (19.d4 Nc4 20.Qd3 Re8=+) 19...Bd5 (19...Bc4!? 20.Rf5 Bd3–/+) 20.N4c3=+ Qd6 21.Nd5 Qd5 22.d4 Nc4 23.e4 Qg5 24.Qd3 Ne3 (24...b5!?=) 25.Rf2+= Rfa8? (25...b5!?+=) 26.h4! Qh6 (26...Qh4 27.Qe3 Deflection) 27.Rf3?? (better 27.Rf4 Ng2 28.Kg2+–) 27...Ng4–/+ 28.g3 Ra4 (better 28...b5!?–/+) 29.Ra4= Ra4 30.Qb3 Ra1 31.Kg2 b5?? (better 31...Qe6 32.Qb7 h5=) 32.Qf7 (32.Qf7 Kh8 33.Qf8) 1–0. Abdullaevich (1810) – kooroshma (1800), lichess.org, 2020.

4.Nc3 Nc6 5.d4 d5 6.Qa4?? (better 6.e4 de4 7.d5–/+) 6...Ra4–+ 7.Na4 Bf5 8.Nc5 (8.Rc1 Nb4–+) 8...b6 (better 8...Qa8 9.e3–+) 9.Nf3 (9.Na6 e6 10.Rc1–+) 9...bc5 10.dc5 e6 (10...Qa8 11.Bc3–+) 11.e3 Nf6 (better 11...Qa8 12.Be2 Qa5 13.Kf1–+) 12.Bb5 Bc5 (12...Qa8 13.Nd4 Qa5 14.Ke2–+) 13.g4 (13.Bc6 Ke7 14.0–0 Qd6–+) 13...Bb4 14.Ke2 Bg4 15.Rhg1 (15.Bc6 Ke7 16.h3 Qd6–+) 15...Bf3 16.Kf3 Nd7 (better 16...Qd7 17.Rac1 Nd4 18.Bd4 Qb5 19.Rc7–+) 17.Rg7 (17.Bc6 Qh4 18.Rg4 Qh3 19.Rg3 Qf5 20.Kg2 Bd6 21.Bg7 Bg3 22.hg3 Rg8–+) 17...Ke7 (17...d4 18.Kg2 Nde5 19.a4 Qd5 20.Kf1 de3 21.Rg2–+) 18.a3 (18.Bc6 Bd6 19.Rg5–+) 18...Nce5 19.Kg2 Bd6 20.a4 (20.f4 Rg8 21.Rg3 Ng4–+) 20...Rg8 21.Rg8 (21.Rg3 Ng4–+) 21...Qg8 22.Kf1 Qg6 23.a5 (23.Bc3 Qc2 24.Be5 Be5–+) 23...Qc2 24.Rb1 Qb1 25.Kg2 Qb2 26.a6 (26.h3 Qb5 27.e4 Ng6 28.h4 Nh4 29.Kh3 Qf1 30.Kh4 Qh1 31.Kg5 h6 32.Kg4 Nf6) 26...Qb5 (26...Ng4 27.Bd3 Qf2 28.Kh3 Ne3 29.Bh7 Qh2) 27.a7 (27.e4 Qd3 28.h3 Qf3 29.Kf1 Qh1 30.Ke2 Bb4 31.ed5 Qe1) 27...Qa6 (27...Qe2 28.a8Q Qf3 29.Kg1 Ng4 30.Qa2 Bh2 31.Kf1 Ne3 32.Ke1 Qd1) 28.f4 Qa7 (28...Qe2 29.Kg3 Qf3 30.Kh4 Qg4) 29.fe5 (29.Kf2 Ng4 30.Kg3 Qe3 31.Kg2 Qf2 32.Kh3 h5 33.f5 Qh2) 29...Be5 (29...Ne5 30.Kf2 Qa2 31.Kg3 Nc4 32.Kf3 Qh2 33.e4 Ne5 34.Ke3 Bc5) 30.Kf3 (30.Kf2 Qa2 31.Kf3 Bh2 32.Kg4 Qg2 33.Kh4 Nf6 34.e4 Qg3) 30...Qa2 31.Kg4 (31.h3 Bh2 32.e4 Qd2 33.ed5 Ne5 34.Ke4 f5) 31…Qh2 (31...Qh2 32.Kf3 Bc3 33.Kg4 Ne5 34.Kg5 h6; 31...Qg2 32.Kh4 Bf6 33.Kh5 Qg6) 0–1. Agiant (1635) – horton9 (1645), lichess.org, 2019.

4.Nc3 Nc6 5.e3 d5 6.Nb5 (6.Bb5 Nf6–/+) 6...Nf6 (6...e5 7.Nf3 f6 8.Be2–/+) 7.Bf6 (7.Qc2 Bd7–/+) 7...ef6 8.Bd3 (8.Qf3 Nb4 9.Qg3 Na6–/+) 8...Ne5 9.Be2 c6 10.Nd4 Bc5 11.Ngf3 Nf3 12.Nf3 0–0 13.0–0 Re8 14.h3 (14.d4 Bd6–/+) 14...Bd6 15.Bd3 (15.Qc2 c5–/+) 15...c5 (15...Be5 16.Ne5 fe5 17.Bc2–+) 16.Qc2–/+ g6 17.Rfb1 Qc7 18.Bb5 Bd7 (18...Bf5 19.d3 Re7 20.Re1–/+) 19.a4 (19.Qc3 f5–/+) 19...Rec8 (19...Bf5 20.d3 Re7 21.Re1–/+) 20.Qd3 (20.Bd7 Qd7 21.a5 Ra6–/+) 20...Bc6 (20...Bf5!? 21.Qd5 Bb1 22.Rb1 f5–/+) 21.Qc3 Kg7 22.d3 (22.a5 d4 23.ed4 Bf3 24.Qf3 cd4–/+) 22...Qd7 (22...d4 23.Qb3 Bf3 24.gf3–/+) 23.Rb3 (23.Bc6 Rc6 24.Rb5 Rca6–/+) 23...Bb5 24.Rb5 (24.ab5 Ra1 25.Qa1 c4 26.dc4 dc4–/+) 24...Qb5?? (better 24...Ra4! 25.Rab1 Ra7–+) 25.ab5+– 1–0. Abdullaevich (1990) – BillinNB (1995), lichess.org, 2019.

4.Nc3 Nc6 5.e3 e6 6.Nf3 Nf6 7.Bd3 (7.Qc2 Be7–/+) 7...Ba3 8.Ba3 Ra3 9.Qc2 (9.0–0 0–0–/+) 9...Qe7 (9...Nb4 10.Qb1 Nd3 11.Qd3–/+) 10.0–0 Nb4 11.Qb1 Nd3 12.Qd3 Nd5 (12...0–0 13.Rfb1–/+) 13.Rfc1 (13.Qd4 Nc3 14.Qg7 Ne2 15.Kh1 Qf8 16.Qf8 Rf8–/+) 13...Nc3 (13...c6 14.h3–/+) 14.Rc3=+ Rc3 15.Qc3 (worse 15.dc3 0–0–/+) 15...0–0 (15...Qf6!? 16.d4 Qd8=+) 16.Qc7+= Qb4 17.d4 Qb2 18.Qc1 Qe2 19.a4 b6 20.Ne5 d6? (20...b5 21.ab5 Qb5 22.Rb1+=) 21.Nc6 (21.Nc4!? d5 22.Nb6 Ba6+–) 21...Bb7 (better 21...Bd7+=) 22.Nb4?? (better 22.Ne7!? Kh8 23.h3+–) 22...Qg4 (better 22...Rc8 23.Qb1 h6–/+) 23.g3?? (23.Nc6!? Rc8 24.d5 Bc6 25.dc6=+) 23...Qf3?? (23...Qe4!? 24.Kf1 e5 25.Qb2–+) 24.Kf1? (better 24.d5!? Rc8 25.Qd1 Qd1 26.Rd1–/+) 24...Qh1 (24...Qg2 25.Ke1–+) 25.Ke2 Qf3 26.Ke1?? (26.Kf1 Rc8 27.Qb2 Qg2 28.Ke1 Qh2–+) 26...Qh1 27.Ke2 Qh2 (27...Bf3 28.Kd2 Qh2 29.Qg1–+) 28.Qc7–/+ Qh5 (28...Qg2 29.d5 Bd5 30.Nd5 Qd5 31.Qb6 Qh5 32.Kd3–/+) 29.Kd2 Qf3 30.Rf1 (30.Nd3 e5=+) 30...Bd5 (30...Qg2 31.Re1 Be4 32.Qd6 Qf2 33.Re2–+) 31.Qd6 (better 31.Nd5!? Qd5 32.Rc1=+ (worse 32.Qb6 Qa2 33.Kd3 Rc8–/+)) 31...Bc4–+ 32.Nd3 Qe4 (32...Qf5!? 33.Qa3–+) 33.Qa3–/+ Rc8 (33...Ra8 34.Rd1 Qf5 35.g4 Qg4 36.Rc1–/+) 34.Rd1 (34.Rc1 Qa8=) 34...Qf3 (better 34...Ba6 35.Rc1 Rc1 36.Nc1 Qf5=+) 35.Ke1?? (35.Rc1 Rc6=) 35...Bd3?? (better 35...e5 36.de5 Be6–+) 36.Qd3= h6 37.Qe2 (37.d5 Qh1 38.Ke2 Qh5 39.Kf1 Rc5 40.de6 Qh3 41.Kg1 Qe6 42.Qd8 Kh7=) 37...Qe2 (37...Qg2 38.Qf1 Qd5 39.Qb5=) 38.Ke2= Rc4 39.Ra1 Rc2 40.Kf3 Rb2 41.g4 f6 42.Kf4 (42.Rc1 f5=) 42...Kf7 (42...Rf2 43.Ke4=+) 43.f3 g5 44.Ke4 Kg6 45.a5 ba5 46.Ra5 Rb6 47.d5 ed5 48.Rd5 h5 0–1. Abdullaevich (1845) – nessy35 (1880), lichess.org, 2020.

4.Nc3 Nc6 5.e3 Nf6 6.Nf3 d6 7.Bd3 (7.d4 d5–/+) 7...e5 8.0–0 h6 (8...Be7 9.Bb5–/+) 9.Bb1 (9.Bb5 Bd7–/+) 9...Be6 (9...Qe7 10.d3–/+) 10.Qc2 (10.d4 Ra5–/+) 10...Nb4 (10...Bg4 11.Qb3 Na5 12.Qd1–/+) 11.Qd1 Be7 12.a3 Nbd5 13.Qc2 (13.Nd5 Bd5 (worse 13...Nd5 14.d4=) 14.d3 c5–/+) 13...Nc3 14.Bc3 Qd7 15.a4 g6 (15...Bd5 16.a5–/+) 16.Nh4 (16.e4 Bg4 17.d4 Bf3 18.gf3 Nh7–/+) 16...Nd5 17.Ng6? (better 17.Nf3!?–+) 17...fg6 18.Qg6 Bf7 19.Qg7 (19.Qe4 Rg8–+) 19...Rg8 20.Qh6 Qg4 21.g3 Nc3 22.dc3 Bd5 (22...d5 23.Qh7–+) 23.e4 (23.Qh7 Qf3 24.e4 Bf7–+) 23...Be4 24.Be4 Qe4 25.Qd2 0–0–0 (25...b6 26.Rfe1 Qc6 27.f4–+) 26.a5 Rh8 27.a6 (27.f3 Qc6–+) 27...ba6 (27...Rh2 28.f3 Rd2 29.fe4 ba6 30.Ra6–+) 28.Ra6 (28.f3 Qc6–+) 28...Rh2! 29.Kh2 (29.Kh2 Rh8 Mate attack) 29...Rh8 30.Kg1 (30.Qh6 Rh6 31.Kg1 Rh1) 30…Rh1 (30...Qh1) 0–1. Abdullaevich (1850) – GuardiolafluRJ (2015), lichess.org, 2020.

4.Nc3 d5 5.d4 Nf6 6.e3 b6 (6...Bf5 7.Qb3 b6 8.Nf3–/+) 7.a4 (7.Nf3 e6=+) 7...e6 8.Nf3 Bd6 (8...Ba6 9.Bb5 c6 10.Ba6 Na6 11.Ne5–/+) 9.Bd3 (9.Bb5 c6 10.Bd3 Ba6–/+) 9...Ba6 10.0–0 (10.Ba3 Bd3 11.Bd6 Bf5–/+) 10...0–0 (10...Bd3 11.Qd3 0–0 12.Rfc1–/+) 11.Qc2 (11.Nb5 Qe7–/+) 11...Bd3 12.Qd3 Na6 (12...Nbd7 13.Nb5–/+) 13.Na2 c5–+ 14.dc5 Nc5 15.Qb5 Na4 16.Nc3 Ra5 17.Qa4 Ra4 18.Ra4 Nd7 19.Nb5 Be7 20.Rd1 Bf6 21.Ba3 Nc5 22.Ra7 Qb8 23.Rc7 Re8 24.Bc5 bc5 25.Rc5 Be7 26.Nc7 Bc5 27.Ne8 Qe8 28.Rc1 Qb5 29.Nd4 Qb2 30.Ne2 (30.Rd1–+) 0–1. super knight (1610) – spereira (1920), internet, 2005.

4.Nc3 d5 5.e3 c6 6.Nf3 f6 7.Be2 (7.d4 Na6=+) 7...e5–/+ 8.0–0 (8.d4 e4 9.Nd2 Bd6–/+) 8...e4 (8...d4!? 9.ed4 ed4–+) 9.Nd4–/+ Bc5 (9...b5 10.a3=+) 10.Na4 (10.d3 Bd4 11.ed4 f5=+) 10...Bd4 (10...Bd6 11.Nc3–/+) 11.Bd4=+ Ne7 (11...Nd7 12.Qc2=+) 12.Bh5 (12.Nb6!? Ra5 13.Qb3+=) 12...g6=+ 13.Be2 (13.Nb6 Ra5 14.Bf6 0–0=) 13...0–0 (13...Nd7 14.Bg4=+) 14.Nc5 (better 14.Nb6!? Ra5 15.Qc2+=) 14...b6–/+ 15.Nb3 c5 (15...Ba6 16.Bc3–/+) 16.Bb2 c4 (16...Ba6 17.f3 Nf5 18.Rf2–/+) 17.Nd4=+ Nbc6 18.Nc6 Nc6 19.a4 Nb4 (better 19...Ne5–/+) 20.Ba3+= Ra4?? (better 20...Nc6 21.Bf8 Kf8+=) 21.Qa4+– Nd3 (21...Na6 22.Bf8 Kf8 23.Qb5+–) 22.Bd3 ed3 (22...Bd7 23.Qa6 cd3 24.Bf8 Qf8 25.Qb7+–) 23.Qb5 (better 23.Bf8 Kf8 24.Qc6 Bd7 25.Qd5 Qc7+–) 23...Re8 (23...Rf7 24.Rfb1+–) 24.f4 (24.Bb2 Re6+–) 24...Bd7 (24...Re6 25.f5 gf5 26.Rf5+–) 25.Qb4 (25.Qd5!? Be6 26.Qb5 c3+–) 25...Bg4 (25...b5 26.Bb2+–) 26.h3 (26.Rfb1 Re6+–) 26...Be2 (26...Bd7 27.Bb2+–) 27.Rfe1 (27.Rfb1 Re6+–) 27...Re4 (27...Re6 28.Ra2+–) 28.Bb2 h5 (28...Re6 29.Bd4+–) 29.Ra6 Re6 30.Bd4 (30.Rea1 Qf8 31.Qb5 Rd6+–) 30...g5 (30...Qd6 31.Rb1 Qb4 32.Rb4 g5+–) 31.fg5 fg5 32.Rea1 Qf6 (32...g4 33.Ra8 Kf7 34.Rd8 c3 35.Qf8 Kg6 36.Qg8 Kf5 37.Rf8 Rf6 38.Rf6 Ke4 39.Qe6) 33.Bf6 Rf6 (33...Kf7 34.Ra7 Kf6 35.Qf8 Ke5 36.Qh8 Kd6 37.Qb8 Kc5 38.Qf8 Rd6 39.Rc7 Kb5 40.Rb1 Ka4 41.Ra7) 34.Rb6 (34.Qe7 Rf7 35.Ra8 Kg7 36.Qg5 Kh7 37.R1a7 Ra7 38.Ra7 Kh8 39.Qg7) 34...Rf7 (34...Kg7 35.Qe7 Rf7 36.Qg5 Kh8 37.Ra8 Kh7 38.Qg6) 35.Ra8 Kg7 (35...Kh7 36.Qd6 Rf1 37.Kh2 Rh1 38.Kh1 c3 39.Rb7) 36.Qd6 Rf1 37.Kh2 (37.Kh2 Rf6 38.Qf6 Kh7 39.Rb7) 1–0. Misak_Arsen – afsharian, lichess.org, 2018.

4.Nc3 d5 5.Nf3 –/+.

4.Nc3 d6 5.Ne4 (5.e4 Nf6=+) 5...Bd7 (5...e5 6.e3–/+) 6.e3 e5 7.Bc4? (7.d4 ed4 8.Bd4 Nc6–/+) 7...Be7?? (better 7...Bc6 8.Bd3 f5–+) 8.d4 (8.Qb3 Nh6=+) 8...Nc6 9.d5 (9.Nf3 ed4 10.0–0 Nf6 11.Nf6 Bf6–/+) 9...Na5 10.f4?? (better 10.Be2–/+) 10...Nc4–+ 11.fe5 (11.Qb3 Nb2 12.Qb2–+) 11...Nb2 12.ed6 (12.Qb3 Na4 13.Nf3–+) 12...Nd1 13.de7 Qe7 14.Rd1 Qe4 15.Nf3 Qe3 16.Kf1 Bb5 17.Rd3 Bd3 0–1. Agiant – sebolxxx (1625), lichess.org, 2019.

4.Nc3 e6 5.e3 Bb4 (better is 5...Nf6!?–/+) 6.Qg4= Bf8 7.Bd3 (7.Qd1!?=) 7...Nf6–/+ 8.Qf3 (8.Qg3 d6–/+) 8...Be7 (8...Nc6 9.Bb5–/+) 9.Nh3 (9.Qg3 0–0–/+) 9...0–0 (9...Nc6 10.Bb5–/+) 10.Nf4 (10.0–0 Nc6–/+) 10...Ba3 (10...Nc6 11.Bb5–/+) 11.Ba3 Ra3 12.g4 (12.0–0 d6–/+) 12...g5 (12...e5 13.Nb5 Ra8 14.g5 ef4 15.gf6 Qf6 16.Ke2–+) 13.Nh5 Nh5–/+ 14.gh5 f5 15.Rg1 h6 16.h4 Qf6 17.hg5+/– hg5 18.Ke2 g4 19.Qf4+= Nc6 20.h6 Ne5 21.h7 Kh8 22.Qb4=+ Ra8 23.Bc2 Nf3 24.Rh1=+ b6 25.Rh5 Ng5 26.Rg5? (26...Ba6 27.Bd3 Bd3 28.Kd3 Qg5 29.Rh1–+; better is 26.Qf4 Ba6 27.Kd1=+). Zylla,Johannes – Thon, BS–Kreismeisterschaf, 1992.

4.Nc3 e6 5.e3 Nf6 6.Nf3 Bb4 7.Bd3 0–0 8.Ne4 (8.Qc2 Nc6–/+) 8...Ne4 9.Be4 d5 10.Bb1 Nc6 11.Qc2 f5 12.0–0 Bd7 13.Ne5 Ne5 14.Be5 Ba4 15.Qb2 c5 (better 15...Qe7!?–/+) 16.Bg7 Bb5 (16...Rf7 17.Be5=) 17.Rc1 (17.Bf8!? Qf8 18.Rd1+=) 17...Rf7 (17...Ba3 18.Qb5 Kg7=+ (worse 18...Bc1 19.Bf8 Qf8 20.Bf5 Qf5 21.Rc1+–)) 18.Be5 (better 18.a3 Rg7 19.ab4 Ra1 20.Qa1=) 18...Qg5?? (18...Ba3!? 19.Qb5 Bc1 20.Qc5 Bd2–/+) 19.d4?? (19.a3 Ba5 20.Qb5 Bd2 21.Rc5 Be3+–) 19...Ra3?? (better 19...Ba3 20.Qb5 Bc1=+) 20.dc5+– Re3 21.fe3?? (21.Qb4 Re5 22.f4=) 21...Qe3–/+ 22.Kh1 Bc5?? (22...Ba3 23.Bd4 Bb2 24.Be3 Ba1 25.Bf5 Rf5 (25...ef5?! 26.Ra1 Re7 27.Bg1=+) 26.Ra1 e5–/+) 23.Re1 (better 23.Bf5!? Rf5 24.Qb5 Re5 25.Qc5 Qc5 26.Rc5 Re2+–) 23...Qf2 (23...Qe1) 24.Bg3?? (better 24.Bc2 Bc4 25.Qc3+–) 24…Qb2–+ (24...Qb2 25.a4 Bc4–+) 0–1. Abdullaevich (1810) – Kolob68 (1980), lichess.org, 2019.

4.Nc3 e6 5.Ne4 d5 6.Ng3 Nd7 7.Nf3 Ngf6 8.e3 Be7 9.Be2 0–0 10.0–0 c5 11.d4 c4 12.a4 b6 13.Ne5 Ba6?? (better is 13...Ne5 14.de5 Nd7–/+) 14.Nc6+/– Qe8 15.Ne7 Qe7 16.Ba3 Qd8 17.Bf8 Qf8 18.a5 b5 19.h3 (19.Qb1 Nb8+=) 19...h6 20.Qc2 Qb4 21.Rfb1 Qd6 22.Qc3 e5 (22...Nb8 23.Rb2=) 23.de5 (23.Rb4 ed4 24.ed4 Nb8=) 23...Qe5+= 24.Qc2 (24.Qd4 Qd4 25.ed4 Nb8=+) 24...Nc5 (24...b4 25.Qd2 Rb8 26.f4=+) 25.Bf3 (25.Qf5 Qd6=) 25...Nb3 (25...Nfe4 26.Ra3=+) 26.Ra2 Rd8 (better is 26...b4=) 27.e4?? (27.Qf5!? Qe7 28.Bd1+=) 27...d4 (27...Nd4 28.Qc3 de4 29.Qe1–+) 28.Nf5? (better is 28.Rb3 cb3 29.Qb3=) 28...d3–+ 29.Qd1 Ne4 30.Be4 Qe4 31.Ne3 Qe6 (31...Nd4 32.Rd2 b4 33.Rb4 c3 34.Rd4 Rd4–+) 32.Kh2? (32.Rb3 cb3 33.Rb2 f5–+) 32...b4 (32...Nd4 33.Rd2–+) 33.g3 (33.Rb3 cb3 34.Rd2 Qe5 35.Kg1 Qc3–+) 33...d2 (better is 33...Bc8 34.a6 Nd4 35.Rb4 c3 36.Rd4 Rd4–+ (36...Qh3?! 37.Kg1 Rd4 38.a7=)) 34.Rc2?? (better is 34.Rb3 c3 35.Ra1–+) 34...c3–+ 35.Rb3 (35.h4–+) 35...Qb3 36.Nf5 (36.h4–+) 36...Be2! (37.Qe2 d1Q–+) 0–1. maxim – cowface, Live Game Caissa's Web, 2004.

4.Nc3 Nf6

5.e3 d5 6.Nf3 Nc6 (6...Bg4 7.Be2–/+) 7.Ne2 (7.Bb5 Bg4–/+) 7...Bg4 8.Ng3 Ne4 (8...e5 9.Qb3 Bd6 10.Qb7–+) 9.Be2 (9.Bb5 Ng5!–/+) 9...f6 10.h3 (10.Qb1 Nd6–/+) 10...Be6 (10...Ng3 11.fg3 Bd7 12.0–0–/+) 11.Nd4 (11.Nf1 Bf7–/+) 11...Nd4–+ 12.Bd4 g6 (12...Ng3 13.fg3 Qd6 14.0–0–+) 13.Ne4–/+ de4 14.0–0 Bg7 (14...Bd5 15.Bb2–/+) 15.Qc2=+ Qd5 (15...Bd5!?=+) 16.Qc7= Rc8 17.Qf4 (17.Qb6 Bd7+=) 17...0–0 (17...Bh3 18.gh3 e5 19.Be5 fe5 20.Qg4=+) 18.a4 (18.d3 Bf5 19.Bd1 e5–/+ (worse 19...ed3 20.Bb3 Rc4 21.a4+=)) 18...Rc2 (18...Bh3!? 19.gh3 e5 20.Be5 fe5=+ (worse 20...Qe5 21.Qe5 fe5 22.Rfb1+=)) 19.Bc3 (19.Rfc1 g5 20.Qg3 Rfc8 21.Rc2 Rc2+=) 19...f5 20.Bg7 Kg7 21.Rfb1 (21.Qh4 Qd6 22.Rfd1 Rfc8=+) 21...Rd2 22.Bb5 (22.Rb5 Qc6 (22...Re2?? 23.Rd5 Bd5 24.Qe5 Rf6 25.Qd5+–) 23.Qe5 Kg8=) 22...Rd8 (22...Qd6 23.Qd6 ed6 24.Rd1 Rd1 25.Rd1–/+) 23.Qh4 (better 23.Qc7!?=) 23...Qd6–/+ 24.a5 (24.Bf1 Bc8–/+) 24...Rc8 (better 24...Ba2!? 25.Rc1 Ra8–+) 25.a6 ba6 (better 25...Ba2!? 26.ab7 Rb8–/+) 26.Ra6+= Rd1 27.Rd1 Qd1 28.Kh2 Qd6?? (better 28...Bf7 29.Qe7 Qd8 30.Qe5 Kg8+=) 29.Rd6+– ed6 30.Qe7 (30.Qe7 Bf7 31.Bd7+–) 1–0. Abdullaevich (1770) – veberag (1895), lichess.org, 2020.

5.e3 e5 6.Bc4 d5 7.Bb3 Bb4 8.Nf3 Bc3 (8...e4 9.Ne5–+) 9.Bc3 Nc6 (9...e4 10.Ne5–/+) 10.Ba4 (better 10.Ne5!? Ne5 11.Be5=) 10...e4=+ 11.Bc6 bc6 12.Nd4 (12.Ne5 c5–/+) 12...Bd7 (12...c5 13.Nb3 c4 14.Nd4–/+) 13.0–0 0–0 (13...c5 14.Nb3 Bb5 15.Re1–/+) 14.f4 (14.Bb4!? Re8 15.Qc2=+) 14...c5–/+ 15.Ne2 Bc6 (15...Bg4 16.Be5–/+) 16.Ng3 (16.a4!?–/+) 16...d4–+ 17.ed4 cd4 18.Bb4 Re8 19.f5 (19.Qc2 Bb5 20.Rfc1 e3–+) 19...Qd5 20.a3 (20.Qc2 d3 21.Qb2 Reb8–+) 20...Bd7 (better 20...e3 21.Qf3 Qf3 22.gf3 e2–+) 21.Qc2 Rac8 22.Rae1? (better 22.Qc5–/+) 22...c5–+ 23.Ba5 d3 (better 23...Qc6!? 24.Rb1–+) 24.Qc3 c4 (24...Bc6 25.Re3–+) 25.Bb6 Bc6 26.Bd4?? (26.Be3 Ra8–+) 26...Ng4 (better 26...e3 27.Rf3 ed2 28.Ref1–+) 27.Ne4?? (better 27.Nh5 e3 28.Nf4 Qf5 29.de3–+) 27...Re4 28.Bg7 Re1 29.Qb4 (29.Re1 Qg2) 29...Rf1 (29...Qg2) 30.Kf1 Qg2 31.Ke1 Qe2 0–1. Agiant (1660) – fitim96 (1685), lichess.org, 2020.

5.e3 e5 6.Bc4 d5 7.Bb3 c5 8.d3 d4 9.ed4 (9.Nb1 Nc6–+) 9...ed4 (9...cd4 10.Ne4–+) 10.Nce2 (10.Ne4 Ne4 11.de4 Qa5 12.Qd2 Nc6–+) 10...Bd7 (10...Bd6 11.Nf3–+) 11.Nf3 Nc6 (11...Bd6 12.0–0–+) 12.0–0 Be7 13.Ng3 0–0 14.Re1 Re8 (14...Na5 15.Ne5–+) 15.Qc2 (15.Ng5 Be6 16.Re6 fe6 17.Be6 Kf8+–) 15...Bf8 (15...Qa5 16.Bc1–+) 16.Ne4? (better 16.Ng5 Re1 17.Re1=+) 16...Ne4–+ 17.Re4 Re4 18.de4 Be6 (better 18...b5!?–+) 19.Be6–/+ fe6 20.Qb3 Qd7 21.Ng5 Nd8 22.Rc1 (22.a4 Bd6–+) 22...h6 (22...b5 23.Ra1–+) 23.Nf3 b5 24.Ne5 (24.Ra1 c4 25.Qc2 d3–+) 24...Qb7 25.Ng6 c4 26.Qf3 Be7 (better 26...Bc5!? 27.Qh5 Rc8–+) 27.Bd4–/+ Nf7 (27...Ra2!? 28.Rd1 Nc6–/+) 28.Ne7 (28.Qg4!? Ba3 29.Re1=) 28...Qe7=+ 29.Rc2 (29.Qe2 Qa3 30.Rc2 Qd3 31.Qd3 cd3=+) 29...Qb4–/+ 30.Qd1 (30.Qc3 Qb1 31.Rc1 Qe4 32.Qb2–/+) 30...Ra3 (better 30...Rd8!? 31.Rd2 e5–+) 31.Rb2 (31.Qa1 Qa4 32.Qb1 Rd3–/+) 31...Qa5 32.h3?? (32.Qe2 Rd3 33.Bc5 Ne5–/+) 32...Ra2 (better 32...Rd3 33.Qg4 Rd4 34.Qe6 b4 35.Qe8 Kh7 36.Qf7 Rd1 37.Kh2 Qe5 38.f4 Qb2 39.Qf5 g6 40.Qf7 Qg7 41.Qc4 Qa7–+) 33.Ra2 (33.Qg4 Ra1 34.Kh2 Qc7 35.f4 e5 36.fe5 Ne5 37.Qe6 Nf7 38.e5 Rd1=+) 33...Qa2 34.Qg4 Qb1 35.Kh2 Ng5 36.h4?? (better 36.f4 Qe4 37.fg5 Qg4 38.hg4=+) 36...Qe4–+ 37.Qe4 (37.Kg3 Qg4 38.Kg4 Nf7–+) 37…Ne4 0–1. Abdullaevich (1850) – VladimirV09, lichess.org, 2020.

5.e4 d5 6.ed5 Nd5 7.Bb5 c6 8.Bf1 –/+.

5.e4 d5 6.ed5 Nd5 7.Nf3 –/+.

5.f3 e6 6.Ne4 (6.e3 d5–/+) 6...Be7 (6...Ne4 7.fe4 Qh4 8.g3 Qe4 9.Nf3–+) 7.d4 (7.e3 0–0–/+) 7...c6 (7...Ne4 8.fe4 Bb4 9.Kf2 Qh4 10.Ke3–+) 8.e3 (8.Nf6 Bf6 9.e4 d5–/+) 8...Qa5 (8...Ne4 9.fe4 Bb4 10.Ke2–+) 9.Nd2 (9.Bc3 Qh5 10.Nf6 Bf6–/+) 9...Bb4 (9...d5 10.Bd3–/+) 10.Bc4 (10.e4 0–0–/+) 10...b5–+ 11.Bb3 0–0 (11...Nd5 12.Bd5 ed5 13.Ne2–+) 12.a3 Bc3 13.Bc3 Qc3 14.Ne2? (better 14.Kf2!?–/+) 14...Qe3–+ 15.Qc2 (15.Nf1 Qg5 16.Nfg3 d6–+) 15...b4! 16.a4 (16.ab4 Ra1 Pinning (16...Ra1 Deflection)) 16...Ba6 17.Ba2?? (17.Nf1 Qg5 18.Nfg3–+) 17…Qe2 0–1. Agiant – Kunasp (1715), lichess.org, 2019.

5.e4 d6

6.Bb5 Bd7 7.Bd7 Nbd7 –/+ (< 7...Kd7 8.Qb3=).

6.Bc4 c6 7.Qb3 e6 8.Nf3 (8.Be2 d5 9.e5 Ne4=+) 8...d5 9.Bd3 Nbd7 10.e5 Ng4 11.Ne2 (11.Be2 Nge5 12.Ne5 Ne5 13.Nd5 Qd5 14.Qd5 ed5 15.Be5 f6–/+) 11...Qc7 12.Qc3 Bc5 13.0–0 Qb6 14.Ned4 (14.Qc2 Nf2 15.Bd4 Bd4 (< 15...Nd3 16.Qd3 Qa6 17.Qa6 Ra6 18.Bc5 Nc5 19.Ng5–+) 16.Ned4 Ng4–+) 14...Ra4 (better is 14...Nde5 15.Ne5 Ne5–+) 15.Rfe1? (15.Bc2 Rc4 16.Qb3 Rb4–+ (16...Rd4?! 17.Qb6 Bb6 18.Nd4=+; 16...Nde5?! 17.Ne5 Ne5 18.Ne6 Be6 19.Be5–+; 16...Nge5?! 17.Ne5 Ne5 18.Ne6 Be6 19.Be5–+)) 15...Nde5!–+ 16.Bc2? (16.Re5 Ne5) 16...Nf3 (17.Qf3 Qb2 18.Ba4 Qd4–+) 0–1. Pietrzak,Wojciech – Van Rooijen,Peter, Orang–Utan Invitational, 2002.

6.Bc4 e5 7.d4 =+.

6.Bc4 e6–/+ 7.Nf3 g6 (7...d5!? 8.ed5 ed5 9.Qe2 Be7–/+) 8.0–0=+ Bg7 9.d4 (9.Re1 Nc6=+) 9...0–0 (9...d5 10.ed5 ed5 11.Re1 Be6 12.Bd3=+) 10.e5 (10.Be2 Nc6=+) 10...de5 (10...Nfd7 11.Ne4=+) 11.de5 Nfd7 12.Ne4 (better is 12.Qe2!?=+) 12...Nc6–/+ 13.Nf6 Nf6 (13...Bf6 14.ef6 e5 15.Bd5 Qf6 16.Bc6 bc6 17.Qe2–+) 14.Qd8 Rd8 15.ef6 Bf8 16.a4 Na5 17.Be2 Bd7 18.Nd4 Bc5 19.Rfd1 Bd4 20.Bd4 Nb3 21.Rab1 Ba4–+ 22.Bc3 Rd1 23.Bd1 Nc5 24.Bf3 Bc2 25.Ra1? Ra1–+ 26.Ba1 Be4 27.Bd4 Bf3 28.Bc5 Bd5 29.f4 h6 30.h4 g5 31.fg5 hg5 32.h5 Kh7–+ 33.Kf2 g4 34.Kg3–/+ Kh6 35.Kg4 Bg2 36.Bf8 Kh7 37.Kg5 b6 38.Be7 c5 39.Bd8 b5–+ 40.Bb6 c4 41.Ba5 Bf3 42.Bc3–/+ Kg8 43.Bb4 c3?? 44.Bc3= Kf8 45.Bb4 Ke8 46.h6+/– Be4 47.Kf4 Bg6 48.Ke5 Kd7 49.Kd4 Kc6 ½–½. Baluch,Wieslaw – Gajda,Leszek, corr 2. AMM Poland , 1994.

6.d4 d5 7.Bd3 Nc6 –/+.

3.e3 b6

4.a3 Bb7 5.ab4= Ra1 6.Ba1 Nc6 7.b5 Ne5?? (better 7...Nb4=) 8.Be5+– f6 9.Bb2 e5 10.Nf3 Ne7 11.Be2 Ng6 12.0–0 Bd6 13.c4 e4 14.Nd4 0–0 15.f4 Bc5 16.Nb3 Bb4 17.Nc3 Qe7 18.Nd5 Bd5 19.cd5 Nh4 (19...f5 20.Qc2 Bd6 21.Bc4+–) 20.Qc2 f5 (20...Bd6 21.Ra1+–) 21.Qc4 (better 21.Qc7!? Ra8+–) 21...Bd6 22.Be5 Be5 (22...Ng6 23.Bd6 Qd6 24.Rc1+–) 23.d6 Qe6 24.Qe6 (24.fe5!? cd6 25.ed6 Qc4 26.Bc4 Kh8+–) 24...de6 25.fe5 cd6 26.ed6 Rd8 27.Rc1 Rd6 28.Rc7 (28.Rc6 Rd7+–) 28...g5 (28...Kf8 29.Bc4+–) 29.Bc4 Kf8 30.Rc6 (better 30.Nd4 e5 31.Nf5 Nf5 32.Rf7 Ke8 33.Rf5+–) 30...Ke7 31.Rd6 Kd6 32.Kf2 Ng6 (32...h6 33.h3+–) 33.g3 (33.Nd4!? Nf8+–) 33...Ne5 34.Be2 Nd7 (34...g4 35.Nc1+–) 35.Nd4 h6 (35...Ne5 36.h3+–) 36.Ke1 (36.Bc4 Nc5+–) 36...Nc5 37.Kd1 Kd5 38.Kc2 f4 39.gf4 gf4 40.Kc3 f3 41.Bc4 Ke5 42.d3 (42.Nf3 ef3 43.d4 Kd6 44.dc5 Kc5 45.Be6 Kb5+–) 42...f2 43.de4 Ne4 (43...Ke4 44.Kd2 e5 45.Nc6 Nb3 46.Kc2+–) 44.Kc2+– Nd6 45.Bf1 Ne4 (45...Kf6+–) 46.Kd3 Nc5 47.Ke2 Na4 48.Kf2 Nc3 49.Bd3 Ne4 (49...Kd5 50.Ne2 Nd1 51.Kf3+–) 50.Be4 Ke4 51.Ke2 (better 51.Ne6!? Kd5 52.Nc7 Kd6+–) 51...e5 52.Nf3 (better 52.Nc6!? Kd5+–) 52...Kd5 53.Nd2 e4 (53...Kc5 54.Kd3+–) 54.Nb3 (54.h4 Kc5+–) 54...Ke5 (54...Kc4 55.Nd4+–) 55.Nd4 Kd5 56.Kf2 Ke5 57.Kg3 Kf6 (57...Kd6 58.Kf4 Kd5 59.h4+–) 58.Kf4 Kg6 (58...h5 59.Ke4 h4 60.Kd5+–) 59.Ke4 Kh5 (59...Kf6+–) 60.Kd5 (60.Kd5 Kg6 61.e4+–) 1–0. BeepBeepImAJeep (2710) – anantone (2555), lichess.org, 2020.

4.Bc4 e6 5.Nf3 Ba6 6.Ba6 Na6 7.Qe2 (7.0–0 Nf6–/+) 7...Nc5 (7...Nf6 8.0–0–/+) 8.0–0 (8.a3 b3 9.d4 bc2 10.Qc2 Na4–/+) 8...Nf6 9.d4 (9.a3 b3–/+) 9...Nce4 (9...Na4 10.c4–/+) 10.c3 (better 10.Ne5–/+) 10...b3 (better 10...bc3!? 11.Nc3 Nc3 12.Bc3 Be7–/+) 11.ab3= Ra1 12.Ba1 Bd6 13.Nbd2 Nd2 14.Qd2 Ng4 (14...Be7 15.c4=) 15.g3 (15.c4 Nf6+=) 15...h5 (15...0–0 16.e4=) 16.e4 h4 (16...Be7 17.c4=) 17.e5 (17.h3!? Nh6 18.Nh4+=) 17...hg3= 18.fg3 Be7 19.Qf4 Nh6 20.Ng5?? (better 20.c4=) 20...Bg5–+ 21.Qf2 (21.Qf3 Nf5–+) 21...Nf5 22.Bb2 (22.Qf3–+) 22...Be3 23.Qe3 Ne3 24.Bc1 Qg5 (24...Nf1 25.Kf1 Qa8 26.Kg1–+) 25.Rf7 Kf7 26.Bd2 (26.Be3 Qe3 27.Kg2 Qe2 28.Kg1 Rh2 29.d5 Qf2) 26...Rh2! 27.Kh2 (27.Kh2 Qh5 Mate attack) 27...Ng4 28.Kg2 (28.Kh3 Qf5 29.d5 Ne3 30.Kh2 Qf2 31.Kh3 Qg2 32.Kh4 Qe4 33.g4 Qg4) 28...Qd2 29.Kh3 (29.Kf3 Nh2 30.Ke4 Qe2 31.Kf4 Qf3 32.Kg5 Qg4) 29...Qf2 (29...Ne3 30.d5 Qg2 31.Kh4 Qe4 32.Kg5 Qg4) 30.Kg4 Qf5 (30...Qf5 31.Kh4 g5 32.Kh5 g4 33.Kh4 Kg6 34.d5 Qh5) 0–1. FallingLeaves (1900) – TwelveTeen (2000), lichess.org, 2017.

4.Nf3 Ba6 5.Ba6 Na6 6.0–0 d6 (6...e6 7.a3=+) 7.d3 e5 8.Nbd2 Be7 (8...Nf6 9.a3=+) 9.Nb3 (9.d4 ed4 10.Nd4 Bf6=+) 9...c6 10.h3 Nf6 11.Nh2 (11.a3 ba3 12.Ra3 0–0–/+) 11...0–0 12.Ng4 Ng4 13.Qg4 f5 (13...Qc8!?–/+) 14.Qc4=+ d5 15.Qc6 d4?? (better 15...Rf6 16.Qb7 Nc5 17.Nc5 bc5 18.Be5 Rb6–/+) 16.ed4+– Rc8 17.Qe6 (17.Qb7 Nb8 18.de5 Rc2+–) 17...Kh8 18.Rac1 (18.de5 Rc2 19.Bd4+–) 18...Rf6 (18...Bg5!?+=) 19.Qe5+– Bd6 20.Qe3 Bb8 (20...Nc7 21.Qf3+–) 21.f4 (21.Qf3 Qd6 22.g3 Rff8+–) 21...Rg6 22.Rf3 (22.Qf3+–) 22...Ba7? (better 22...Nc7!?+–) 23.Rg3 (23.Re1 Bb8+–) 23...Rg3 24.Qg3 Qd5 (24...Nc7 25.Re1 Nd5 26.Qg5+–) 25.Kh1 (25.Re1 Bb8+–) 25...Nc7 (25...Bb8 26.Re1+–) 26.Re1 Rg8 (26...Qd7 27.d5! Nd5 28.Re5+–) 27.Re7 (better 27.Re5 Qc6 28.Re7+– (28.Rf5?! Qc2 29.Ba1 Qa2+–)) 27...Ne6?? (better 27...Bb8+–) 28.Ra7 g6 (28...Rc8 29.Qf2+–) 29.Qh4 h5 (29...Rg7 30.Qf6 Kg8 31.Rg7 Ng7 32.Qb6 Nh5+–) 30.Qf6 Rg7 31.Rg7 (better 31.Re7 Kh7 32.Re6 b5+–) 31...Ng7 32.Qb6 Qg8 (32...Kh7 33.Qb4 Qa8 34.d5+–) 33.Qb4 Kh7 34.Qe7 Kh6 (34...Kh6 35.d5 Ne8+–). Abdullaevich (1755) – Jamaica_kid, lichess.org, 2019.

4.Nf3 Bb7 5.Be2 e6 6.0–0 c5 7.d3 Nf6 8.Nbd2 g6 (8...d5 9.Nb1–/+) 9.c3 bc3 10.Bc3 Bg7 11.a4 Nc6 12.Nc4 d5 13.Nce5 Ne5 14.Ne5 0–0 15.Qc2 Qc7 16.Bf3 Rfc8 17.Rfc1 Ba6 18.Qd2 Rd8 19.Qb2 Ne8 20.Ng4 Bc3 (better is 20...Bd3!? 21.Bg7 Ng7–+) 21.Qc3+= h5 22.Nf6? (better is 22.Ne5+=) 22...Nf6–+ 23.Qf6 Rdc8 24.Qg5 Bd3–+ 25.Bh5 Qd8 26.Qd8 Rd8 27.Bf3 Ra5 28.Rc3 c4 29.h3 Kf8 30.e4 d4 31.Rcc1 e5 32.Bd1 Ke7 33.f3 Rda8 34.g4 b5 35.Kf2 ba4 36.Ra3 Kd6 37.Rca1 Kc5 38.Ra4 Ra4 39.Ra4 Ra4 40.Ba4 f6 41.h4 Kb4 42.Bd1 Kc3 43.Ke1 Kb2 44.h5+= gh5 45.gh5 c3 46.h6 c2?? 47.Bc2!+– Bc2 48.h7 d3 49.Kd2 f5 50.h8Q fe4 51.Qe5 Kb3 52.fe4 Kc4 53.Qd5 Kb4 54.e5 Bb3 55.Qd6 Kc4 56.e6 (56.e6 Ba4 57.e7+–) 1–0. ejdrzej (1745) – fakazer, kurnik, 2012.

3.e3 c5

4.a3 ba3 5.Na3 d5 6.Nb5 Ra1 7.Qa1 Nc6?? (7...Nf6 8.Qa4 Nc6 9.Be5–/+) 8.Nf3?? (better 8.Bg7 Nd4 9.Bd4 cd4 10.Nd4+–) 8...f6=+ 9.c4 e6 10.cd5 ed5 11.Be2 Bd6 (11...Be7 12.0–0=+) 12.0–0 Bb8 13.d4 (13.Rc1 b6=+) 13...c4=+ 14.Ba3 Nge7 15.e4 0–0 (better 15...de4!? 16.Nd2 Be6=+) 16.ed5+= Qd5 17.Nc3 (17.Rc1 Qd8+=) 17...Qh5 18.Ne5 Qe8?? (18...Ne5 19.Bh5) 19.Bc4+– Kh8 20.Nc6 bc6 (better 20...Qc6 21.Be7 Qc7+–) 21.Re1 Qd8 (21...Qh5 22.g3 Bh3 23.Be7 Qf3+–) 22.Be7 Qd4 (22...Qc7 23.Bf8 Qh2 24.Kf1 Qh1 25.Ke2 Qg2 26.Nd1+–) 23.Bf8 (better 23.Re4 Qd2 24.Bf8+–) 23...Qf4 (23...Be5 24.Re4 Qd8+–) 24.Bd6! Bd6 (24...Qd6 25.Re8 A double attack) 25.Re8 Theme: Double Attack (25.Re8 Bf8 26.Rf8) 1–0. BeepBeepImAJeep (2560) – Hard_dominant (2340), lichess.org, 2019.

4.Bc4 b6?? 5.Nf3 (better 5.Qf3 Nf6 6.Qa8+–) 5...e6 6.0–0 Nf6 7.a3 g6 (7...ba3!? 8.Ne5 a2=+) 8.ab4= cb4?? (better 8...Ra1 9.Ba1 d5=) 9.Ra8+– Nc6 (9...Bd6+–) 10.Bf6 Qf6 11.Rc8 Nd8 (11...Ke7 12.d4+–) 12.Nd4 (12.d4 Bd6+–) 12...Bg7 (12...Bc5 13.Nb3+–) 13.c3 (13.Rc7 e5 14.Qg4 0–0+–) 13...0–0 14.cb4 Nc6 15.Rf8 Bf8 16.Nc6 dc6 17.Nc3 (17.b5!? c5+–) 17...Bb4 18.f4 (18.Ne4!? Qb2+–) 18...Bc3 19.dc3 Qc3 20.Qd8 (20.Qd3 Qd3 21.Bd3 Kg7+–) 20...Kg7 21.Qd4 Qd4 22.ed4 b5 (22...Kf6 23.Rb1 b5 24.Bd3+–) 23.Bb3 (23.Bd3 h6+–) 23...h6 (23...Kf6 24.Bc2 h6 25.Be4+–) 24.Rc1 g5 25.fg5 hg5 26.Rc6 Kf6 (26...b4 27.Rb6+–) 27.d5 Ke5 (27...Ke7 28.de6 fe6 29.Re6 Kf8+–) 28.d6 Kd4 (28...g4 29.d7 Kf6 30.d8Q Kg6 31.Bc2 Kh5 32.Qf6 b4 33.Rc5 e5 34.Re5) 29.d7 (29.d7 Ke3 30.d8Q b4 31.Qg5 Kd3 32.Bc2 Ke2 33.Rd6 b3 34.Qe5) 1–0. Akrapovik (1630) – CrazyFishR, lichess.org, 2019.

4.Bc4 Nc6 5.Nf3 e6 6.0–0 Nf6 7.d4 (7.Bb5 d5=+) 7...d5–/+ 8.Bb5 Bd7 9.dc5 Ne5 (9...Bc5 10.c4–/+) 10.Bd7 (10.Ne5 Bb5 11.Nd3 Nd7=+) 10...Ned7–/+ 11.a3 Bc5 12.ab4 Ra1 13.Ba1 Bb4 14.Qd4 Bc5 15.Qa4 0–0 16.Nbd2 b6 17.c4 Qa8 18.Qa8 (18.Qb3!?–/+) 18...Ra8–+ 19.cd5 Nd5 20.Ne4 Be7 21.Bd4 N5f6 (21...b5 22.Rc1–+) 22.Nf6–/+ Bf6 (22...Nf6?! 23.Bb6 Ne4 24.Rc1=+) 23.Bf6 gf6 (23...Nf6 24.Rb1–/+) 24.Rd1 Nc5 25.g3 Rb8 (25...Ra2 26.Rb1–/+) 26.Nd4 b5 27.Rb1 (27.Rc1 Na4–/+) 27...b4 28.Nc6 (28.Nb3 Na4–/+) 28...Rb6–+ 29.Nb4 (29.Nd4 b3 30.f3 b2–+) 29...Nd3! 30.Nd3 Rb1 31.Kg2 Kg7 32.h4 e5 33.Nc5 (33.Kf3 Kg6–+) 33...Rb5 (33...f5 34.Nd7 Rb5 35.Kh3–+) 34.Ne4 h6 (better 34...Kg6!?–+) 35.h5–/+ Rd5 36.g4 Ra5 37.Ng3 Kh7 38.Nf5 e4 (38...Ra4 39.Kf3–/+) 39.Kg3 (39.Nd6 Re5=+) 39...Ra4 (39...Ra6 40.Kf4 Ra2 41.Kg3=) 40.Kf4 (40.Nd6!?=) 40...Ra2=+ 41.Kg3 Ra4 (41...Rd2 42.f3=+) 42.Nd6= Kg7 (42...f5 43.gf5 Kg7 44.Kf4=) 43.Kf4 f5 (43...Kg8 44.Kf5=) 44.Nf5 Kh7 45.Nd6 f6 (45...Kg7 46.Ke5+=) 46.Ne4+– Kg7 47.Kf3 Ra5 48.Ng3 Re5 49.Nf5 Kh7 50.Kf4 Ra5 51.e4 Rb5 52.f3 Ra5 53.Kg3 Rb5 54.Kf4 Re5 (54...Ra5 55.Ne3 Kg7 56.Nc4+–) 55.Kg3 Ra5 (55...Rb5 56.Ne3+–) 56.Kf4 Kg8?? (better 56...Re5=) 57.Nh6+– Kg7 (57...Kf8 58.Nf5+–) 58.Nf5 Kh7 59.Kg3 (59.g5 fg5 60.Kg5 Ra8+–) 59...Re5 (59...Ra3+–) 60.Kf4 Re6?? (60...Ra5 61.g5 fg5 62.Kg5+–) 61.Kg3 (61.g5!? fg5 62.Kg5 Re8+–) 61...Ra6?? (61...Re5 62.Kh4+–) 62.Kf4 Kg8?? (62...Ra5 63.g5 fg5 64.Kg5 Ra8+–) 63.h6 (better 63.g5!? fg5 64.Kg5 Kf7+–) 63...Kh7 64.g5 fg5 65.Kg5 Rg6 (65...Re6 66.Kf4+–) 66.Kf4 (66.Kh4 Re6+–) 66...Ra6 67.Kg4 (67.Ke5 Ra5 68.Ke6 Ra6 69.Nd6 Kh6+–) 67...Ra4 (67...Rg6 68.Kh4 Re6+–) 68.Kf4 Kg6?? (68...Ra6 69.Ke5 Ra5 70.Ke6 Ra6 71.Nd6 Kh6+–) 69.Kg3 (better 69.Ke5!? Ra3+–) 69...Ra7 70.Kf4 Kf6?? (70...Ra4 71.Ke5 Ra5 72.Ke6 Ra6 73.Nd6 Kh6+–) 71.Kg4 (better 71.Ne3 Rf7+–) 71...Ke5 (71...Kg6+–) 72.Kg5 Rb7 (72...Rc7 73.Ne3 Ke6 74.Kg6+–) 73.Ng7 (73.f4!? Ke6+–) 73...Rb2 (73...Rb8 74.h7+–) 74.Nf5 Rh2 (74...Rh2 75.Nh4 Rc2+–). Abdullaevich (1845) – Silentlost35 (1910), lichess.org, 2020.

4.Nf3 Nf6 5.Be2 Nc6 6.0–0 d6 7.c4 (7.d4 cd4 8.ed4 d5=+) 7...e5 (7...bc3 8.Nc3 e5 9.Bb5–/+) 8.d3 (8.d4 e4 9.Nfd2 Be7=+) 8...Be7–/+ 9.e4 (9.a3 0–0–/+) 9...0–0 10.Nbd2 Bd7 11.Nb3 Na5 12.Ne1 (12.Nfd2 Re8–/+) 12...Ba4 13.f3 (13.f4 Qc7–/+) 13...Qd7 (13...b5 14.cb5 Qb6 15.Kh1–+) 14.f4 ef4 15.Rf4 Qc6 (15...b5 16.Nf3–/+) 16.Nf3 Nd7 (16...b5 17.Nh4–/+) 17.Kh1 (17.Na5 Ra5 18.Qe1 Qc7=+) 17...Rfe8 18.Qc2 Bf6 19.h3 (19.d4 cd4 20.Bd4 Be5–/+) 19...Bb2 (better 19...Nb3!? 20.ab3 Bb3 21.Ra8 Bc2 22.Re8 Nf8 23.Rf6 Qe8 24.Rd6 b3–+) 20.Qb2–/+ Ne5 (20...b5 21.Na5 Ra5 22.d4–/+) 21.Ng5 (21.Na5!? Ra5 22.a3 ba3 23.Ra3–/+) 21...f6 (21...b5 22.cb5 Bb5 23.Nc1–+) 22.Nf3 1–0. Akrapovik (1605) – BORIS_KACARSKII (1675), lichess.org, 2019.

3.e3 c6

4.Nf3 d5 5.Be2 Nf6 6.0–0 g6 7.a3 b3 (7...ba3!? 8.Na3 Bg7=+) 8.cb3= Bg7 9.b4 0–0 10.d4 Nbd7 11.Nbd2 Nb6 12.Nb3 (12.a4 Bf5+=) 12...Re8 13.Nc5 Nfd7 (13...Nc4 14.Bc4 dc4 15.Ne5=) 14.a4 Nc5 15.bc5 Nd7 16.a5 (16.Qb1 e5 17.Ne5 Ne5 18.de5 Be5=) 16...e5 (16...Nc5 17.Qc2 Ne4 18.Nd2–/+) 17.Bc3 (17.Qd2!?=) 17...e4=+ 18.Nd2 f5 (18...Nc5!? 19.Qc2 Na6–/+) 19.Qc2 Qg5 20.g3 h5 21.Rae1 h4 22.f4 (22.Rb1 Kf7=) 22...Qh6 (22...Qf6 23.Rc1=) 23.Kg2 Nf6 24.Rh1 (24.Nb3 Ng4 25.Bg4 fg4 26.gh4 Rf8=+) 24...Ng4 25.Nf1 Bf6 (25...h3 26.Kg1=+) 26.Bg4 (26.h3 Ne3 27.Ne3 hg3 28.Ref1+–) 26...fg4=+ 27.Nd2 h3 28.Kf2 Re7 29.Ke2 Bf5 30.Rb1 Qf8 31.Nf1 Ra7 32.Kd2 Qa8 33.Rb6 Rc7 34.Qa4 Rd7 35.Kc2 (35.Rb1 Ra6–/+) 35...Bd8–+ 36.Nd2 Bb6 37.cb6 Ra6 38.Nb3 Rd6 (better 38...Rb6! 39.Nc5 Ra6–+) 39.Nc5=+ Qb8 (39...Rf6!?=+) 40.Na6= ba6 41.Qb4 Bd7 42.Qc5 Re6 43.Bb4 Kf7 44.Kb2 g5? (better 44...Kg8!?+–) 45.Rf1+– gf4? (45...Re8+–) 46.Rf4 Kg6 (46...Kg7 47.Qf8 Qf8 48.Bf8 Kg6 49.Rg4 Kf7 50.Rf4 Kg8+–) 47.Rf8 Rf6 (47...Re8 48.Re8 Be8 49.Qd6 Qd6 50.Bd6 c5+–) 48.Rb8 Rf2 49.Kb3 Rf1 50.Rg8 (50.Qd6 Rf6 51.Rg8 Kh6 52.Qf6 Kh5 53.Rh8) 50...Kf7 (50...Kh7 51.b7 Be8 52.Qe7 Kg8 53.b8Q Rb1 54.Ka2 Rb2 55.Kb2 c5 56.Qbe8) 51.Qf8 Ke6 52.Rg6 Rf6 53.Qf6 (53.Rf6) 1–0. BeepBeepImAJeep (2625) – UESC (2015), lichess.org, 2015.

4.Nf3 f6 5.Nh4 (5.a3 ba3 6.Ba3 d6=+) 5...d5 (better 5...Nh6!?–/+) 6.Qh5= Kd7 7.Bd3 (7.Ng6!? Qe8 8.Nf8 Qf8 9.d4=) 7...Nh6=+ 8.0–0 Kc7 (better 8...e5 9.e4 Kd6–/+) 9.a4?? (9.Qe2 e5 10.e4 de4 11.Qe4 g5–/+) 9...Na6 (9...Bg4 10.Be5 Kb6 11.a5 Ra5 12.Bd4 c5 13.Ra5 Ka5 14.Bc5–+) 10.c4?? (10.Nf3 Qd6 11.Ne1 Kd8–/+) 10...Nc5 (better 10...bc3 11.Nc3 Bg4 12.Nb5 cb5 13.Be5 Kb6–+) 11.Be2 (11.Qe2 Be6–/+) 11...Nd3 (11...g5 12.cd5 Qd5 13.Rc1–+) 12.Bd3–/+ Bg4 13.Be5 Kb6 14.Bd4? (better 14.a5 Ra5 15.Bd4 Rc5 16.Qg4 Ng4 17.Nc3 dc4 18.Bf5 Nh2 19.Na4 Kb5 20.Nc3 Kb6 21.Na4 Kb5 22.Nc3 Kb6=) 14...Ka5–+ 15.Qg4 Ng4 16.cd5 (16.Be2 Nh6–+) 16...Qd5 17.Nf3 (17.Rc1 e5 18.Bc4–+) 17...e5 18.Bf5 Nh6 (18...Nh2!? 19.Kh2 ed4 20.e4–+) 19.e4 Qb3 (19...ed4?! 20.ed5 Nf5 21.dc6 bc6 22.g4–/+; worse 19...Nf5 20.ed5 Nd4 21.Nd4 ed4 22.dc6 bc6 23.d3–+) 20.Be3 Nf5 21.ef5 Qb2 (21...Qb2 22.Nc3 bc3–+) 0–1. Abdullaevich (1945) – kukin2017 (1890), lichess.org, 2020.

3.e3 Nc6

4.a3 ba3 5.Na3 e5 6.c4 Nf6 7.Nb5 d6?? (better 7...Ra1 8.Qa1 d6–/+) 8.Ra8+– Be7 9.Nf3 0–0 10.Be2 (10.d4 Nd7+–) 10...Qd7 11.0–0 e4 12.Nfd4 Ne5 13.f4 ef3 14.Nf3 c6 15.Nbd4 (15.Ne5 de5 16.Na7 Bd6+–) 15...Neg4 16.h3 Nh6 (16...Ne5 17.Ne5 de5 18.Nf3+–) 17.Qa1 (17.Qc2 Nh5+–) 17...Ne4 18.d3 (18.Bd3 f5+–) 18...Ng3 19.Rf2 c5 (19...Bf6 20.Bd1+–) 20.Nc2 (20.Nb5 f6+–) 20...f6 21.e4 b5 22.Ne3 bc4 23.dc4 (23.Qa2!? Qe6 24.Bd1 f5+–) 23...Ne4 24.Rf1 Ng3 25.Re1 Re8 (25...Ne2 26.Re2 Nf7 27.Nd5+–) 26.Nd5 Bf8 (26...Bb7 27.Re8 Qe8+–) 27.Bd3 Re1 28.Qe1 Nhf5 29.Qa5 (better 29.Nb6 Qe6 30.Rc8 Qe1 31.Ne1 Kf7+–) 29...Bb7 30.Rd8 (30.Qa7 Kf7+–) 30...Qe6 31.Qd2 Bd5 32.cd5 Qd5 (32...Qe3 33.Qe3 Ne3+–) 33.Qc2 Ne3 (33...Qe6 34.Bc4 d5 35.Bd5 Qd5 36.Rd5 Nd6+–) 34.Qc3 (34.Bh7 Kf7 35.Qg6 Ke6 36.Bg8 Ke7 37.Qe8) 34...Nd1 (34...Ne4 35.Qa3 f5+–) 35.Qc4 Qc4 (35...Ne3 36.Qd5 Nd5+–) 36.Bc4 Kh8 (36...d5 37.Bd5 Kh8 38.Rf8) 37.Rf8 1–0. BeepBeepImAJeep (2560) – Kormi88 (2215), lichess.org, 2019.

4.a3 ba3 5.Na3 e5 6.Nc4 d6?? (better 6...Ra1 7.Ba1 e4–/+) 7.Ra8+– Nf6 8.Nf3 Be7 9.Be2 0–0 10.Ng5 (10.0–0 Qd7+–) 10...h6 (10...Nd7 11.Nh3+–) 11.Nf3 d5 (11...e4 12.Nd4+–) 12.Nce5 Ne5 13.Be5 Bd6 14.d4 (14.0–0 Be5 15.Ne5 Qd6+–) 14...Ng4 (14...Bb4 15.Kf1+–) 15.0–0 (15.Bd6 Qd6 16.Qd3 g6+–) 15...Be5 (15...Ne5 16.de5 Bc5 17.Qd3+–) 16.de5 Qe7 (16...f6 17.e6! Qe7 18.Qd5 Be6 19.Qb7 Ra8 20.Qa8 Kf7 21.h3+–) 17.Qd5 c6 (17...Rd8 18.Qb5 c6 19.Qa5+–) 18.Qd6 Qd6 19.ed6 Bd7 (19...Nf6 20.Ne5+–) 20.Rf8 Kf8 21.Nd4 (21.Ra1 g6+–) 21...Ne5 (21...Nf6 22.Ra1 g6 23.Ra7+–) 22.f4 Ng6 23.f5 (better 23.Ra1 Kg8 24.Ra7 Nf8+–) 23...Ne5 24.e4 (24.Ra1 g6+–) 24...Ke8 25.c4 (25.Ra1 Kd8+–) 25...Bc8 (25...c5 26.Nf3 Nc6 27.Ra1+–) 26.c5 Kd7 (26...Nd7 27.Ne6! b6 28.cb6 Nb6 29.Ng7 Kf8 30.Ne6 Ke8 31.Nc7 Kd7 32.e5+–) 27.h3 (27.Ra1 Kd8+–) 27...f6 (27...b6 28.cb6 Kd6 29.f6 gf6 30.Rf6 Kc5 31.Nf3 Nf3 32.Bf3 Kb6 33.Rf7+–) 28.Ne6 g5 (28...b6 29.cb6 Kd6 30.Rd1 Ke7 31.Rd8 Be6 32.b7 Kd8 33.b8Q Bc8 34.Ba6+–) 29.fg6! Ng6 30.Bg4 (30.Rf6 Ne5 31.Nc7+–) 30...b6 31.Ng7 (31.Nd4 Ke8 32.Bc8 Nf8 33.cb6 c5 34.b7 Kf7 35.b8Q Kg6 36.Bf5 Kg7 37.Ne6 Ne6 38.Be6 Kg6 39.Qg8 Kh5 40.Qg4) 31...Kd8 32.Bc8 (better 32.Rf6!? Bg4 33.hg4 Ne5 34.Rf8 Kd7 35.cb6 Kd6 36.Rd8 Ke7+–) 32...Kc8 33.cb6 c5 34.Rf6 (better 34.b7 Kb7 35.d7 Ne7+–) 34...Ne5 35.Rh6 (35.Rf5 Nc6 36.e5 Kb7+–) 35...c4 36.Ne6 c3 37.Rh8 (37.Nc5 Nf7 38.Rg6 Nd8 39.Rg8 c2 40.d7 Kb8 41.Rd8) 37...Kb7+– 38.Rh7 Kb6 39.Rc7 (better 39.d7 Nc6 40.Rf7 c2+–) 39...Nc6 40.Kf2 (40.Nf4!? c2 41.Ne2 Ne5+–) 40...c2 41.Rc6! Kc6 42.e5 (better 42.Nd4 Kd6 43.Nc2+–) 42...c1Q=+ 43.Kg3?? (better 43.Nd4 Kd7 44.Nf3=+) 43...Qe3–+ 44.Kh2 (44.Kg4 Qe5 45.Nf4–+) 44...Qe5 45.g3 (45.Kg1 Qe6 46.Kf2 Qf6 47.Kg3 Qd6 48.Kg4 Qe6 49.Kf3 Qf6 50.Ke2 Kd5–+) 45...Qe6 46.h4 Kd6 (46...Kd6 47.h5 Qe2 48.Kh3 Qh5 49.Kg2 Ke5 50.Kf2 Ke4 51.Kg2 Qd5 52.g4 Kf4 53.Kf2 Qf3 54.Ke1 Ke3 55.g5 Qe2) 0–1. Akrapovik (1630) – AlexprosBY (1670), lichess.org, 2020.

4.a3 ba3 5.Na3 e6 6.c4 Rb8 7.Nb5 Nf6 8.Nf3 d6 9.Be2 Be7 10.0–0 0–0 11.d4 e5 (11...d5 12.Ba3=+) 12.d5 (better 12.de5 de5 13.Ne5+=) 12...Nb4=+ 13.Qb3 c5 (13...Na6 14.Qc2–/+) 14.dc6 (14.Ne5!? de5 15.Be5+=) 14...Nc6= 15.Qb4?? (better 15.Rfd1 e4 16.Nd2=) 15...Nb4–+ 16.Ba3 Nc6 17.Rfd1 (17.Bd6 Bd6 18.Rfd1 Qe7 19.Nd6 Bg4–+) 17...Qb6 (17...Ra8 18.Nd6 Bd6 19.Rd6 Qd6 20.Bd6 Ra1 21.Bf1–+) 18.Rab1 (18.Nd6 Be6–+) 18...Qa6 (18...Bf5!? 19.Rb2–+) 19.Bd6 (19.Ra1 e4 20.Nd2 Na5–+) 19...Bd6 20.Nd6 Be6 21.Bf1 (21.Ra1 Qb6–+) 21...e4 (21...Bg4 22.c5 Qa7 23.Rdc1–+) 22.c5 (22.Ng5 Ne5 23.Ne6 fe6–+) 22...Qa2 (22...Qa3 23.Nd4–+) 23.Nd4 Nd4 24.ed4 Nd5 (better 24...b6!? 25.Ra1 Qb3 26.Rab1–+) 25.Bc4 Qa5 26.Ra1 Qc7 27.Rac1 (27.Ne4 Rfd8–+) 27...Nf4 28.Bf1 Rfd8 29.Ne4 Bd5 (29...Bb3!? 30.Rd2 Ne6 31.Rc3 Rd4 32.Rd4 Nd4 33.h3–+) 30.Nc3 Qc6 (30...Qe7 31.g3 Ne6 32.Bh3–+) 31.Bb5 (31.Nd5 Nd5 32.Be2 b6–+) 31...Qe6 32.Nd5 Nd5 (32...Rd5 33.h4–+) 33.Re1 (33.g3 Nc7 34.Bd3 Qg4–+) 33...Qf6 34.Bc4 Nf4 35.Re4 (35.g3 Nh3 36.Kg2 Ng5–+) 35...Rd4 (better 35...Nh3 36.gh3 Qg5 37.Rg4 Qc1 38.Bf1–+) 36.Re3 Rc4! 37.Rce1 The mate threat is Re8 (37.Rc4 Theme: Deflection from a1 37...Qa1 A beautiful mate combination) 37...h6 (37...Qc6 38.Rf3 Ng2 39.Rg3 Ne1 40.Kf1 Rc1 41.f4 Qh1 42.Ke2 Rc2 43.Ke3 Re8 44.Kd4 Qe4) 38.g3 Nh3 39.Kg2 Ng5 (39...Qf2 40.Kh3 g5 41.Re8 Re8 42.Re8 Kg7 43.Rg8 Kg8 44.c6 Qf1) 40.f4 Ne6 (40...Qc6 41.Re4 Re4 42.Kf2 Rf4 43.Ke3 Qc5 44.Kf4 Qd4 45.Kf5 g6) 41.R1e2–+ Nc5 42.Re8 Re8 43.Re8 Kh7 44.Re2 (44.Re3 Rc2 45.Kh3 Qf5 46.g4 Qf4 47.Kh4 Qh2 48.Rh3 g5 49.Kh5 Qh3) 44...Rc3 (44...Qc6 45.Kf2 Nd3 46.Ke3 Re4 47.Kf3 f5 48.g4 Rf4 49.Ke3 Rf3 50.Kd4 Qc5) 45.Rf2 (45.h3 Qg6 46.Kf2 Qg3 47.Kf1 Rc1 48.Re1 Re1) 45...Qd4 (45...Nd3 46.Rf3 Rc2 47.Kh3 Qf5 48.g4 Nf4 49.Rf4 Qf4 50.g5 Rh2) 46.f5 (46.f5 Qe4 47.Kg1 Rc1 48.Rf1 Rc2 49.Rf2 Qe1 50.Kg2 Qf2 51.Kh3 Qf3 52.f6 Qh5; 46.Kh3 Qf2 47.Kg4 f5 48.Kf5 Qe2 49.h3 Qe6) 1–0. BeepBeepImAJeep (2680) – BearJr (2065), lichess.org, 2016.

4.a3 d5 (4...e5 5.Bb5–/+) 5.ab4 Ra1 6.Ba1 Nb4 7.Nf3 Nc6 8.Be2 Nf6 9.c4 e6 10.0–0 Be7 11.d4 0–0 12.Qb3 (12.cd5 ed5 13.Ne5 Nb4–/+) 12...Ne4 (12...Na5 13.Qa4 Nc4 14.Bc4 dc4 15.Qc4–/+) 13.Nc3 Nc3 (13...Na5 14.Qa4 Nc3 15.Bc3 Nc4 16.Bc4 dc4 17.Qc4–/+) 14.Bc3= dc4 15.Bc4 b6 16.Rc1 Bb7 17.Bd3 Bd6 18.Qc2 f5 19.Bc4 Qf6 (19...Qe8 20.Qb3 Nd8 21.Be2=+) 20.Qb3 (20.d5!? Ne5 A) worse 21.de6 A1) 21...Bf3?? 22.e7 Kh8 23.ef8R (23.ef8N?! Be4 24.Qb2 Qg5+–) 23...Bf8 24.Be5 Qe5 25.gf3+–; A2) 21...Nf3 22.gf3 Qg6 23.Kf1 Re8–/+; B) 21.Be5 Be5 22.de6+=) 20...Nd8=+ 21.d5 e5 (21...Qe7 22.Rd1=+) 22.h3 Qe7 (better 22...Nf7!?=) 23.Be5+– Be5?? (23...Qe5 24.Ne5) 24.d6+– Theme: Double Attack 24...Qf7 25.dc7 (better 25.Ne5 cd6 26.Nf7 Nf7 27.Bf7 Rf7+–) 25...Bf3 (25...Bc7 26.Bf7 Nf7 27.Rc7 Bf3 28.gf3 b5+–) 26.Bf7 Nf7 27.c8Q Be4 28.Qd7 h6 29.Rc8 Rc8 (29...Bb2 30.Rf8 Kh7 31.Qb2 Ne5 32.Qe5 Kg6 33.Qdg7 Kh5 34.Qg4) 30.Qc8 Kh7 31.Qf7 (31.Qf7 Bh2 32.Kh2 Bg2 33.Qcg8) 1–0. BeepBeepImAJeep (2650) – leomessi_23 (2135), lichess.org, 2016.

4.c4 bc3 5.Nc3 e5 6.Nd5 d6 (6...Nge7 7.Qf3–/+) 7.Bc4 (7.Bb5 Nge7 8.Ne7 Be7 9.Bc6 bc6–/+) 7...Be6 8.Qf3 (8.e4 Na5 9.Be2 f5–/+) 8...Be7 (8...Na5 9.Be2–+) 9.d4 Nf6 (9...ed4 10.Bb5 Ra5 11.Bc6 bc6 12.Nf4–/+) 10.Nf6=+ Bf6 11.Be6 (11.d5 Na5 12.de6 Nc4 13.Qb7 Nb2 14.Qb2 fe6 15.e4–/+) 11...fe6–/+ 12.de5 (12.Qh5 g6 13.Qg4 Qd7–/+) 12...Ne5–+ (12...de5?! 13.Ne2–/+) 13.Qb7?? (better 13.Be5 Be5 14.Rc1–+) 13...Rb8 14.Qf3 (14.Qa6 Rb2 15.Ne2–+) 14...Nf3 15.Nf3 Bb2 16.0–0 0–1. Agiant – ErwinK92 (1605), lichess.org, 2020.

4.Nf3 d5 5.Be2 Be6 (5...f6 6.d4–/+) 6.0–0 Nf6 7.a3 Bf5 8.ab4 Ra1 9.Ba1 Nb4 10.c3 Nc6 11.Na3 (11.Bb5 Bg4=+) 11...e5–/+ 12.Nb5 e4 13.Ng5 (better 13.Nfd4!? Bd7 14.c4–/+) 13...h6–+ 14.Nh3 Qd7 (14...Bh3!? 15.gh3 Ne5–+) 15.Nf4–/+ g5 (15...Be7 16.c4 dc4 17.Bc4–/+) 16.Nh5 (better 16.Nd5!? Nd5 17.c4=) 16...Nh5–/+ 17.Bh5 g4 18.f4? (18.c4 Rg8 19.cd5 Nb4–/+) 18...ef3! 19.c4 (19.gf3 Bd3 Combination) 19...fg2 (19...Rg8 20.cd5 Nd8 21.Qa4–+) 20.Rf2 (better 20.Nc7 Kd8 21.Rf4=+) 20...Ne5?? (better 20...Rh7 21.cd5 Ne7=+) 21.Be5+– Rg8 (21...dc4 22.Nd4 g3 23.hg3 Rh7 24.Nf5 Qd5+–) 22.Rg2 (better 22.Nc7 Kd8 23.Nd5+–) 22...Rg5? (better 22...c6 23.Nc7 Kd8+–) 23.Bf7?? (better 23.Nc7!? Kd8 24.Nd5 Rh5 25.Bc7 Qc7 26.Nc7 Kc7 27.d4+– (27.Rg4? Bg4 28.Qe1 Bb4–+)) 23...Qf7?? (better 23...Kf7!? 24.Bf4 Rh5–/+) 24.Qa4?? (24.Nc7 Kd8 25.Nd5 Bg7+–) 24...c6?? (better 24...Ke7 25.Bc7 dc4 26.Bd6 Kf6 27.Bf8 Qf8 28.Qc4 Kg6+=) 25.Qa8+– Ke7 26.Bd6?? (26.Qb7 Bd7 27.Bd6 Kf6 28.Bf8 cb5 29.Bh6 Rh5 30.cb5 Qe6 31.Rf2 Kg6+–) 26...Ke6? (better 26...Kf6 27.Bf8 cb5 28.cb5 Kg6=) 27.Nc7?? (27.cd5 Kf6 28.dc6 (worse 28.Qf8 Qf8 29.Bf8 cb5+=) 28...bc6 29.Qc6+– (29.Qf8?! Qf8 30.Bf8 cb5=)) 27...Kd6–+ 28.Ne8 (28.Qd8 Ke5 29.cd5 Be7 30.Qh8 Kd6–+) 28...Ke7 (better 28...Kd7 29.Qb7 Ke8 30.Qc6 Qd7 31.cd5–+) 29.Nc7 Bd3 (29...g3 30.Rg3 Qg6 31.Kf2–+) 30.Rf2 Rf5 31.Rf5 Bf5 32.Qb7 Kd6 (better 32...dc4 33.Nd5 Ke6 34.Qc6 Ke5–+) 33.Na6?? (better 33.c5 Ke7 34.Nd5 Ke6 35.Qc6 Ke5 36.Nf4=) 33…Qb7–+ (33...Qb7 34.Nb4 Qb4 35.c5 Kc5 36.Kg2 Qd2 37.Kf1 Bd3 38.Kg1 Qe1 39.Kg2 Be4) 0–1. Akrapovik (1665) – Jhepoy123 (1675), lichess.org, 2020.

4.Nf3 d6 5.c4 e5 6.a4 (6.d4 ed4 7.Nd4 Nge7–/+) 6...ba3! 7.Na3 (7.Ra3 Bf5 Combination; 7.Na3 e4 Combination; 7.Ba3 e4 Combination) 7...Nf6 8.Nb5 Ra1 9.Qa1 Be7 10.Be2 0–0 11.0–0 h6 (11...Bg4 12.Qd1–/+) 12.h3 (12.d4 ed4 13.Nbd4 Bd7=+) 12...Be6 (12...e4 13.Nfd4–/+) 13.d4=+ ed4 14.ed4 d5 15.Ne5 (15.c5 Ne4–/+) 15...dc4 16.Nc4 (16.Nc6 bc6 17.Na3 Nd5 18.Bc4 Qd6–/+) 16...Nd5–+ 17.Ne5 Ne5 (17...Nf4!? 18.Bf3 Bd5 19.Nc3 Bf3 20.Nf3 Nd4 21.Nd4 Qd4 22.Rd1–+) 18.de5–/+ c6 19.Nd6 Bd6 20.ed6 Qd6 (better 20...f6–/+) 21.Bg7+= Re8 22.Bh6 f6 23.Bf3 Qe5 (23...Kh7 24.Bd2 b5+=) 24.Re1?? (better 24.Qb1 f5 25.Qb7+–) 24...Qa1=+ 25.Ra1 Kf7 (better 25...b5=) 26.Bh5+– Ke7 27.Be8 Ke8 28.Ra7 b5 29.Bg7 (29.Be3 Ne3 30.fe3 b4+–) 29...b4 (29...c5!?+–) 30.h4+– c5 31.h5 c4 (31...b3 32.Rb7 c4 33.f3+–) 32.h6+– Bg8?? (32...Bf5 33.g4! Bd3+–) 33.Kf1 (better 33.Ra8 Kf7 34.Rf8 Kg6 35.Rg8+–) 33...c3+– 34.Ke1?? (better 34.Ke2 b3 35.Ra8 Kd7 36.Rg8=) 34...b3–+ 35.Kd1 (35.Ra8 Kd7 36.Ra7 Kc6 37.Ra6 Nb6 38.Ra3–+) 35...b2 36.Rb7 Bh7 37.Rb5 (37.Ke2 c2 38.Rb2–+) 37...c2 38.Ke2 Nc3 39.Kf3 0–1. Abdullaevich (1835) – scoopy_1 (1835), lichess.org, 2020.

4.Nf3 Nf6 5.a3 ba3 6.Na3 g6 (6...e5!?–/+) 7.Be2 Bg7 8.0–0 0–0 9.d4 b6 10.c4 Bb7 11.Nb5 Ra1 12.Qa1 Na5 13.Bc3 (13.Qa4 c6 14.Nc3 c5=+) 13...c6 (13...Bf3 14.gf3 c6 15.Na3–/+) 14.Ba5 cb5 Black gets in control 15.Bc3 bc4 16.Bc4 Opening the c–file gets Black a lot of play 16...Qc7 17.Be2 Rc8 18.Bb4 Nd5 (18...Ng4 19.g3 d6 20.Bd2–/+) 19.Ba3 (19.Bd2 Qd6=+) 19...Qc3 20.Rc1 Qa1 21.Ra1 Nc3 22.Bf1 d6 23.Bb4 Nd5 24.Be1 Ra8 25.Rb1 e5 26.de5 de5 27.Bc4 e4 28.Nd2 Rc8 29.g3 (29.Bd5 Bd5 30.Rb6 f5–/+) 29...h5 30.Bd5 Bd5 31.Rb6 Rc1 32.Kf1?? (32.Rb1 Rc2 33.Rb8 Kh7 34.Rd8–/+) 32...Bc4 (better 32...Bc3 33.Kg2 Re1–+) 33.Nc4=+ Rc4 34.Rb1 Kh7 35.Rd1 Rc2 (35...g5 36.Ba5=+) 36.h4 f5 37.Rd2 Rd2 38.Bd2 Be5 39.Ke2 Kg7 40.Be1 Kf6 41.f4 (41.Ba5 Bd6=+) 41...ef3 (41...Bd6!?–/+) 42.Kf3= Bd6 43.e4 Be5 44.ef5 Kf5 45.Bf2 Bf6 46.Be3 Be5 47.Bf2 Bf6 48.Be1 Be5 49.Bf2 ½–½. BeepBeepImAJeep (2555) – Evgenyermolaev (2335), lichess.org, 2017.

4.Nf3 Nf6 5.Bb5 g6 6.0–0 Bg7 7.c3 (7.d4 Ra5 8.a4 0–0=+) 7...Na7 8.Be2 bc3 9.Nc3 0–0 10.Rb1 d5 11.d4 c6 12.Ne5 Nd7 13.Nf3 Nf6 (13...Nb6 14.Bd3=+) 14.Ne5–/+ Bf5 15.h3? (better 15.Rc1–/+) 15...Bb1–+ 16.Qb1 Nc8 17.Nf3 (17.Qc2 Qd6–+) 17...Nd6 18.Bd3 Nfe4 19.Bc2 (19.Be4 Ne4 20.Ne4 de4 21.Qe4 Ra2–+) 19...Nc3 20.Bc3 Nc4 (20...Qc7 21.Rc1–+) 21.Bb3 (21.Qb7 Qd6 22.Qb1 Na3–+) 21...Qc7 22.Bc4 dc4 23.Bb4 Rfe8 24.a3 b5 25.Bc5 e5 26.Rd1 (26.de5 Be5 27.Rd1 Red8–+) 26...ed4 27.ed4 Re2 28.Rd2 Rd2 29.Nd2 Qf4 30.Nf3 f5 31.Qe1 Qe4 32.Qe4 (32.Qc1 Qd5–+) 32...fe4 33.Nd2 (33.Ne1 Bf8 34.Nc2 Bc5 35.dc5 c3–+) 33...Re8 (better 33...c3!? 34.Nb3 c2 35.Kf1–+) 34.Kf1 Bh6 (34...c3 35.Nb3 c2 36.h4–+) 35.Ke2 (35.Nb1 e3 36.Nc3 Bf8–+) 35...Bd2 (better 35...c3 36.Nb3 c2 37.d5 cd5 38.Be3–+) 36.Kd2 Kf7 37.Ke3 Kf6 (37...Ke6 38.Kd2–+) 38.Bd6 (38.Bb4 h6–+) 38...Kf5 39.Be5 (39.Kd2 Rd8 40.Bc5 Ke6–+) 39...h5 (39...Re5 40.g4 Ke6 41.de5 Ke5 42.h4–+) 40.g3 (40.Bd6 g5–+) 40...Ra8 (40...Re5 41.g4 hg4 42.hg4 Ke6 43.de5 Ke5 44.f4 ef3 45.Kf3–+) 41.Bd6 Re8 (41...Ke6 42.Bc5 c3 43.Ke2–+) 42.Bc5?? (42.Be5 Re5 43.g4 hg4 44.hg4 Ke6 45.de5 Ke5 46.f4 ef3 47.Kf3–+) 42...g5–+ 43.Bd6 (43.Bb4 g4 44.h4 Ke6–+) 43...g4 44.h4 (44.hg4 hg4 45.Bb4 Rh8–+) 44...Kg6 (44...Ke6 45.Bc5–+) 45.Be5 (45.Bf4–+) 45...Re5 46.de5 Kf5 (better 46...c3!? 47.e6 Kf6 48.e7 Ke7 49.Ke2–+) 47.e6 Ke6 48.Ke4 c5 49.Ke3 (49.Kf4 b4 50.ab4 cb4–+) 49...b4 (better 49...Kf5–+) 50.a4 b3 51.Kd2 Kd6 52.Kc3 (52.a5–+) 52...Kc6 53.Kc4 (53.Kb2 Kb6 54.Kc3 Ka5 55.Kc4 b2–+) 53...b2 54.Kc3 b1Q 55.Kc4 (55.a5 Qc1 56.Kd3 c4 57.Ke4 Qe1 58.Kf5 Qa5 59.Kg6 c3 60.Kg7 c2 61.f4 gf3 62.g4 Qa7 63.Kg6 f2 64.Kg5 Qg7 65.Kf4 f1Q 66.Ke3 c1Q 67.Ke4 Qce1) 55...Qb4 (55...Qc2) 56.Kd3–+ Qa4 57.Kd2 (57.Ke3 Qd4 58.Ke2 c4 59.Ke1 Qd3 60.f4 gf3 61.Kf2 Qe2 62.Kg1 Qg2) 57...Qd4 58.Kc2 Qf2 (58...c4 59.f3 Qd3 60.Kb2 Qd2 61.Ka3 Qc2 62.Kb4 Qb3 63.Ka5 Qb5) 59.Kc3 Qg3 (59...Qd4 60.Kb3 Qd2 61.Ka3 c4 62.Ka4 Qa2 63.Kb4 Qb3 64.Ka5 Qb5) 60.Kc2 (60.Kc4 Kd6 61.Kb5 Qb3 62.Ka5 Kc6 63.Ka6 Qb6) 60...Qh4 (60...c4 61.Kb2 Qd3 62.Kc1 g3 63.Kb2 g2 64.Kc1 g1Q 65.Kb2 Qgb1) 61.Kd2 (61.Kb2 g3 62.Kb3 g2 63.Kc2 g1Q 64.Kd2 Qhd4 65.Ke2 Qgf2) 61...g3 62.Ke2 (62.Ke3 g2 63.Kd3 g1Q 64.Ke2 Qe4 65.Kd2 Qge1) 62...Qf4 63.Kd1 (63.Kd3 g2 64.Kc2 Qc4 65.Kd2 h4 66.Ke3 g1Q 67.Kf3 Qg3) 63...g2 (63...Qf2 64.Kc1 g2 65.Kd1 g1Q) 64.Ke2 (64.Kc2 g1Q 65.Kd3 Qd1 66.Kc3 Qfd4) 64…g1Q (64...g1Q 65.Kd3 Qd1 66.Kc3 Qfd4) 0–1. aravind555 – gravator (1620), lichess.org, 2018.

4.Nf3 Nf6 5.Be2 e6 6.0–0 Bc5 7.Ne1 d5 8.Kh1 (8.Nd3 Bd6–/+) 8...0–0 (8...Qe7 9.Nd3 Bd6 10.f4–/+) 9.Nd3 Bd6 10.a3 ba3 11.Na3 Ba3 (11...Ra5!?–/+) 12.Ba3=+ Re8 13.f4 (13.Bb2 Ra1 14.Qa1 Nd7=+) 13...e5 (13...Ne4=+) 14.Nf2? (14.fe5!? Ne5 15.Ne5 Re5 16.Bb2 Ra1 17.Qa1=) 14...e4 (14...ef4 15.ef4 Bf5 16.Bb5–+) 15.d3 (15.Bb2 Ra1 16.Qa1 Re6=+) 15...ed3 (15...d4!? 16.ed4 e3 17.Ne4 Nd4 18.Bb2 Ra1 19.Nf6 Qf6 20.Ba1–+) 16.Qd3–/+ d4 17.e4 Qd7 18.g4 (18.Bf3=+) 18...Qe6 (18...b6 19.Bb2 Ra1 20.Ra1–/+) 19.Bf3 (better 19.f5!? Qe5 20.Bd6 Ra1 21.Be5 Rf1 22.Bf1 Re5 23.g5=) 19...b6–/+ 20.e5? (20.Bb2 Nb4 21.Qd2 Ra1 22.Ba1 c5–/+) 20...Nd5 (20...Ba6 21.c4 dc3 22.Qc3–+) 21.Rfe1 (better 21.Qe4 Rd8 22.Bd6 Ra1 23.Ra1 cd6 24.Qd5 Qd5 25.Bd5–/+) 21...Nf4?? (better 21...Ra5 22.Qe4 Bb7–+) 22.Qb5?? (better 22.Qe4 Bd7 23.Qf4+=) 22...Bb7–+ 23.Bd5 (23.Qb2–+) 23...Qd5 24.Qd5 Nd5 25.e6 (25.Bb2 Ne3 26.h4 Ne5 27.Kh2 Nf3 28.Kg3 Ne1 29.Re1 Nc2 30.Re8 Re8–+) 25...Re6 (better 25...Ne3 26.Re3 de3 27.Nd3 Nd4 28.Kg1 Nc2 29.ef7 Kf7 30.Rf1 Kg8 31.Bb4–+) 26.Rf1 (26.Bb2 Ra1 27.Ra1 Re2–+) 26...Ne3 27.Rfe1 Nb4 (27...Ne5 28.Ne4 Be4 29.Kg1 Nf3 30.Kf2 Ne1 31.Re1 Ng4 32.Kf1 Nh2 33.Kf2 Rf6 34.Ke2 Ra3 35.Kd2 Rf2 36.Re2 Nf3 37.Kc1 Re2 38.Kb2 Rae3 39.Kb1 Rc2 40.Ka1 Re1) 28.Kg1 Nbc2 29.Rec1 Ra3 (better 29...Na1 30.Rc7 Bc6 31.Bb2–+) 30.Ra3 Na3 31.Rc7 Ng4! 32.Rb7 (32.Ng4 h5 Decoy) 32...Re1 (better 32...h5!? 33.Nd3–+) 33.Kg2 Re2 (better 33...Ne3 34.Kf3 g5 35.Rb6 Nac4 36.Rb8 Kg7–+) 34.Rb8 Re8 35.Re8 1–0. Akrapovik – Pastpawn2020 (1610), lichess.org, 2020.

3.e3 d5

4.c4 bc3 5.Nc3 e5 6.Nf3 e4 7.Nd4 Bc5 (7...c5 8.Bb5 Bd7 9.Nde2–/+) 8.Na4? (better 8.Nd5 c6 9.Ne2=) 8...Bd7?? (better 8...Be7–/+) 9.Nc5+– Nf6 (9...Qg5 10.Qb3 b6 11.h4+–) 10.Nd7 (better 10.Nb7!? Qc8 11.Nc5 Qd8+–) 10...Qd7 (10...Nbd7 11.d3+–) 11.Be2 0–0 12.0–0 Qd6 (12...c5 13.Nb3 c4 14.Bf6 gf6 15.Nd4+–) 13.Nf5 Qe6 14.Ng3 (14.Bg4 Qb6 15.Be5 Re8+–) 14...Nc6 (14...Nbd7 15.d3+–) 15.a3 (15.Qb3 Rfe8+–) 15...Na5 (15...Ne5 16.Qb3+–) 16.Bc3 (16.d3 Rfe8+–) 16...Nb3?? (16...c5+–) 17.Qb3 1–0. Abdullaevich (1775) – Tamik75 (1780), lichess.org, 2020.

4.Nf3 c5 5.c4 bc3 6.Nc3 Bg4 (6...Nf6 7.Bb5 Bd7 8.Qc2–/+) 7.h3 (7.Qb3 Nd7 8.Nd5 e6=) 7...Bh5 (7...Bd7 8.d3–/+) 8.Be2 (8.Qb3 Bf3 9.gf3 e6 10.Qb7 Nd7=) 8...Nc6 (8...e6 9.Qb3 Bf3 10.Bf3–/+) 9.0–0 (better 9.Qb3!? e6 10.Qb7+=) 9...Nf6–/+ 10.Nh2 (10.Qb3 Qd7–/+) 10...Be2 11.Qe2 e6 12.Ng4 (12.Rfb1 Be7–/+) 12...Be7 (12...Ng4 13.Qg4 Ne5 14.Qd1–+) 13.Nb5 0–0 14.a4 e5 Black plans d4 (better 14...Nd7!?–+) 15.Ne5= Ne5 16.Be5 d4 (better 16...Qd7!?=) 17.ed4+– cd4 18.Bd4 Re8 19.Qf3 Nd5 20.Qg3 (20.Rfe1 Qd7+–) 20...Bf6+= 21.Bf6 Nf6 (better 21...Qf6!? 22.Nc3 Nc3 23.Qc3 Qf4+–) 22.Nc7+– Ne4 23.Qh2 Nd2 24.Rfd1 (24.Ne8?! Nf1 25.Qe5 Qe8 26.Qe8 Re8 27.Kf1 g5=) 24...Qg5 25.Qg3 Qf6 (25...Qg3 26.fg3 Nc4 27.Ne8 Re8 28.Rab1+–) 26.Na8 Ne4?? (26...Ra8 27.Qd3 Rd8+–) 27.Qe3 Nd6 (27...Qe5 28.Nb6 Qb8 29.Nd7+–) 28.Qa7 (28.Qb6 Ra8 29.Qd6 Qd6 30.Rd6 h6+–) 28...Ne4 (28...Rd8 29.Rd4 h6 30.Rad1+–) 29.Nc7 (29.Nc7 Rf8 30.Nd5+–) 1–0. Abdullaevich (1790) – leoches1024 (1710), lichess.org, 2019.

4.Nf3 Nc6 5.a3 e6 6.ab4 Ra1 7.Ba1 Bb4?? (better 7...Nb4 8.Be2 Nf6–/+) 8.Bg7+– Ke7 9.Bh8 Nf6 10.Bf6 Kf6 11.c3 Bd6 12.Be2 (12.d4 Kg7+–) 12...Ne5 (12...e5 13.d3+–) 13.0–0 (13.Ne5 Be5 14.d4 Bd6+–) 13...Qg8 (13...Nf3 14.Bf3 Kg7 15.d4+–) 14.Ne1 (14.Ne5 Ke5 15.c4 Kf6+–) 14...Ke7 (14...Kg7 15.d4 Nc6 16.c4+–) 15.f4 Ng6 16.Bh5 (16.c4 dc4 17.Bc4 Bd7+–) 16...Nh4 17.Qg4 (17.Qe2 Qg7+–) 17...Qg4 18.Bg4 Nf5 (18...Bd7 19.g3 f5 20.Be2+– (worse 20.gh4 fg4 21.Kg2 e5+–)) 19.Bf5 ef5 20.Nf3 h6 21.Nd4 (better 21.d3 b5+–) 21...Kf6 (21...Bd7 22.d3+–) 22.Rf3 (better 22.Nb5!? Bc5 23.Nc7 Be6+–) 22...c5 23.Nb5 Be7 24.d4 (24.Nc7 Be6+–) 24...Bd7 25.Nc7 c4 (25...Bc6 26.Rh3 Kg6 27.dc5 Bc5+–) 26.Nd5 Ke6 27.Ne7 Ke7 28.Nd2 (28.Rh3 h5+–) 28...Bc6 (28...Be6 29.Rh3+–) 29.Rh3 b5 30.Rh6 Be4 (30...f6 31.Rh7 Kd8 32.Kf2+–) 31.Ne4 fe4 32.Rb6 (32.Rb6 Kf8 33.Rb5+–) 1–0. Akrapovik – DeathGripElectric, lichess.org, 2020.

4.Nf3 Nf6 5.Be2 e6 6.0–0 g6 7.Ng5 (7.Ne5 Nbd7=+) 7...Bg7 8.f4 c5 9.a3 ba3 10.Ba3 (10.Ra3 Ra3 11.Na3 0–0–/+) 10...Qc7 (10...Nc6 11.Nc3 h6 12.Nf3–/+) 11.Bb2 Ra1 12.Ba1 Nc6 13.Nc3 0–0 14.Nb5 Qe7 15.c4 Bd7 16.d4 (16.Bc3 Rd8–/+) 16...cd4 17.Nd4 Nd4 (17...Na5 18.cd5 ed5 19.Nc2–+) 18.Bd4 dc4 19.Bc4 Bc6 20.Qa1 b5 21.Bd3 Ra8 22.Qb2 Exerts pressure on the isolated pawn 22...Nh5 (22...h6 23.Nf3–/+) 23.Bg7=+ Ng7 24.Bb5?? (24.Rc1 Qd7 25.Qc2=+) 24...Bb5?? (better 24...Rb8–+) 25.Qb5= Qa3 26.h3? (better 26.Re1!?=) 26...Qe3 (26...h6 27.Ne4 Qe3 28.Nf2 Qf4 29.Qd3–+) 27.Kh2–/+ Nf5 28.Rg1?? (better 28.Rf3 Qd4 29.Qe5–/+) 28...Qf4–+ 29.Kh1 (29.g3 Ra2 30.Kh1 Ng3 31.Rg3 Qg3 32.Qe8 Kg7 33.Qf7 Kh6 34.Qh7 Kg5 35.Qe7 Kh6 36.Qf8 Kh5 37.Qh8 Kg5 38.Qd8 Kf4 39.Qf6 Ke4 40.Qe6 Kd4 41.Qa2 Qh3 42.Kg1 Qe3 43.Kg2 Qg5 44.Kh3 Qf5 45.Kg2 Qg4 46.Kf2 Qf4 47.Kg2 Ke5–/+) 29...Qg5 (29...Ng3 30.Kh2 Nf1 31.Kh1 Qh2) 30.Qc6 (30.Qb7 Ra2 31.Qb8 Kg7 32.Qe5 Kh6–+) 30...Rd8 (better 30...Ra2 31.Qc8 Kg7 32.Qc3 Kh6 33.Qf3–+) 31.Qc3 (31.Qb7 Rd2 32.Qb8 Kg7 33.Qe5 Kh6–+) 31...Ne3 (better 31...Ng3 32.Kh2 Ne2–+) 32.Kh2 (32.Qb2–+) 32...Nf5 (better 32...Qf4 33.g3 Qf2 34.Kh1 Qf3 35.Kh2 Ng4 36.hg4 Qc3 37.Kh3 Qe3 38.Rb1 Rd3 39.Rb8 Kg7 40.Rg8 Kg8 41.Kg2 Rd2 42.Kh3 Qh6) 33.Qc7?? (33.Kh1 Ng3 34.Kh2–+) 33...Kg7 (33...Rd2!? 34.Kh1–+) 34.Qe5 Qf6 35.Qf4 Rd4 36.Qf3 (36.Qb8 Ne3 37.Kh1 e5–+) 36...Nd6 (36...Qe5 37.Kh1 Ng3 38.Qg3 Qg3 39.Rf1 Rd2 40.Rg1 e5 41.Re1 Qg2) 37.Qe3 Qf4 38.Qf4 Rf4 39.g3 (39.Re1 Rd4–+) 39...Rf2 40.Kh1 Ne4 41.Re1 (41.g4 Ng5 42.Rg2 Rg2 43.Kg2 Nh3–+) 41...Ng3 42.Kg1 Ra2 43.Re3 Nf5 (43...Ne2 44.Kf1–+) 44.Rf3 h5 45.Rf1 (45.Rf2 Ra3 46.Kh2 Nd4–+) 45…f6 0–1. Akrapovik (1670) – Ohneotrix (1660), lichess.org, 2019.

3.e3 d6

4.a3 ba3 5.Na3 Nf6 6.c4 Nc6 7.Nf3 Bg4 8.Be2 e5 9.Nb5 Ra1 10.Qa1 Be7 11.h3 Bf3 12.Bf3 0–0 13.0–0 Nd7 14.d4 ed4 (14...Bf6 15.Be4=+) 15.Bc6 (15.Nd4!? Nde5 16.Nc6 Nf3 17.gf3 bc6 18.Bg7+=) 15...bc6=+ 16.Nd4 c5 (better 16...Ne5=+) 17.Nc6+– Qe8 18.Bg7 (worse 18.Ne7 Qe7 19.Bg7 Rb8=) 18...Ne5? (better 18...Bf6 19.Bf6 Nf6 20.Qf6 Qc6+–) 19.Bf8+– Bf8 20.Ne5 Bg7 21.Qa7 Be5 22.Qc7 Qe6 (22...h6 23.Rd1+–) 23.Rc1 (better 23.Qd8 Kg7 24.Qg5 Qg6 25.Qg6 Kg6 26.Rd1+–) 23...Bb2 (23...Kg7+–) 24.Qb8 Kg7 25.Qb2 (25.Qb2 Kg6 26.Rd1+–) 1–0. BeepBeepImAJeep (2540) – orrbaverlekszarnyon (2025), lichess.org, 2019.

4.a3 e5 (4...ba3!? 5.Na3 e5–/+) 5.ab4= Nd7?? (better 5...Ra1 6.Ba1 Nf6=) 6.Ra8+– Ngf6 7.b5 Be7 8.Nf3 0–0 9.c4 (9.Be2 Nb6 10.Ra7 e4+–) 9...Nb6 10.Ra1 Bg4 11.Be2 e4 12.Nd4 (12.Bf6 Bf6 13.Nd4 Be2 14.Qe2 d5 15.cd5 Nd5+–) 12...Be2 (12...Nc4 13.Bc3 (13.Bc4?! Bd1 14.Kd1 d5+=; 13.Bg4?! Nb2 14.Qe2 Nd3 15.Kf1 d5+–) 13...Be2 14.Qe2+–) 13.Qe2 (worse 13.Ke2 Nc4 14.Bc3 Ne5+–; worse 13.Ne2 Nc4 14.Bc3 Qd7+–) 13...d5 14.cd5 Nbd5 15.0–0 Nb4 16.Nf5 (16.f3 Nd3 17.Ba3 Ne5+–) 16...Nd3 17.Bd4 c5 (17...Qd7 18.Ne7 Qe7 19.Nc3+–) 18.Bc3 (18.bc6 bc6 19.f3 c5 20.fe4 cd4 21.Qd3 de3 22.Qe3 Ng4+–) 18...b6 (18...Qd7 19.Ne7 Qe7 20.Bf6 Qf6 21.Nc3+–) 19.Ne7 (better 19.f3!? Ne8+–) 19...Qe7 20.Na3 Nd5 21.Nc4 Qe6 22.Nb2 N3f4 (22...Nb2 23.Bb2 Nb4 24.f3+–) 23.ef4 Nf4 24.Qe3 Qg4 Threatening mate: Qxg2 25.g3 Nh3 (25...Nd5 26.Qe1 Nf4 27.f3 ef3 28.Qe5 Nh3 29.Kh1+–) 26.Kh1 f5 (26...Ng5 27.f4 ef3 28.Na4+–) 27.f3 Qh5 (27...f4 28.Qe4 Qd7 29.Ra8 fg3 30.Qc4 Qf7 31.Qf7 Kf7 32.Ra7 Ke6 33.hg3+–) 28.fe4 f4 29.Qf3 (29.gf4 Qe8+–) 29...Qh6 (29...Qf3 30.Rf3 Ng5 31.Rf4 Rf4 32.gf4 Ne4 33.Ra6+–) 30.Kg2 (better 30.Ra7 Rf7 31.Rf7 Kf7 32.gf4 Qe6+–) 30...Ng5 31.Qg4 f3 32.Kh1 f2 (32...Nf7 33.Rf3 Qg6 34.Qg6 hg6 35.Ra7+–) 33.Nd3 (better 33.Ra7 Rf6 34.h4 Qg6 35.hg5 Rf7 36.Rf7 Qf7 37.Qc8 Qf8 38.Qf8 Kf8 39.Rf2 Ke8+–) 33...Nh3 (33...Qg6 34.Nf2 h5 35.Qd7+–) 34.Qg7 (34.Ra7 Ng5 35.Rf2 Rf5 36.Ra8 Kf7 37.Qf5 Ke7 38.Ra7 Ke8 39.Qd7) 34...Qg7 35.Bg7 Kg7 36.Kg2 Ng5 37.Rf2 Rf2 (37...Ne4 38.Ra7 Kg8 39.Re2+–) 38.Nf2 Ne4 (38...Kf6 39.Ra6 Ke5 40.d3+–) 39.Ne4 Kg6 40.Nc3 Kf5 41.Nd5 c4 42.Nb6 c3 43.dc3 Ke4 44.c4 Kd4 45.Rc1 Kc5 46.Nd7 Kd6 47.Nf6 Kc7 48.Nh7 Kb6 49.Ng5 (49.c5 Kb7 50.c6 Kc7 51.h3 Kd8 52.c7 Kc8 53.g4 Kd7 54.c8Q Ke7 55.Re1 Kf7 56.Qd7 Kg8 57.Re8) 49...Kc5+– 50.Nf3 Kb6 51.c5 Kb5 (51...Kc7 52.c6 Kb6 53.c7 Ka5 54.Rb1 Kb6 55.c8Q Ka7 56.b6) 52.Ne5 (52.c6 Kb6 53.c7 Kb5 54.c8R Kb6 55.Rb8 Ka7 56.Rb4 Ka6 57.Ra1) 52...Kb4 53.c6 Kb3 (53...Ka4 54.c7 Kb4 55.Rb1 Kc5 56.c8Q Kd6 57.Ng6 Kd5 58.Rd1 Ke4 59.Qe6) 54.c7 Kb2 55.c8Q Ka3 (55...Kb3 56.Rb1 Ka2 57.Qc2 Ka3 58.Qb3) 56.Qc3 Ka4 57.Ra1 Kb5 58.Ra5 (58.Ra5 Kb6 59.Ra8 Kb5 60.Qa5; 58.Qa5) 1–0. BeepBeepImAJeep (2725) – Inferno3000 (2425), lichess.org, 2017.

3.e3 e6

4.a3 ba3 5.Na3 Nf6 6.Nb5 Ra1 7.Qa1 c6 (7...d6 8.Bf6 gf6 9.Qc3–/+) 8.Nc3 (better 8.Qa8+=) 8...d5–/+ 9.Nf3 Be7 10.Be2 Nbd7 11.0–0 e5 12.d4 e4 13.Nd2 0–0 14.Nd1 (14.Ba3 Re8–/+) 14...Bd6 (14...b5!? 15.Bc3–+) 15.c4–/+ Qc7 16.h3 Ne8 (16...Re8 17.c5 Bh2 18.Kh1–/+) 17.Nc3=+ dc4 (17...Ndf6 18.Rc1 dc4 19.Nce4 Ne4 20.Ne4=+) 18.Nc4 (18.Bc4 Nb6 19.Bb3 Be6 20.Nce4 Bb3 21.Nb3 Qe7 22.Nd6 Nd6= (22...Qd6? 23.Ba3 Qc7 24.Bf8 Kf8 25.Nc5+–)) 18...b5 (18...Ndf6!?=+) 19.Nd6= Qd6 (better 19...Nd6 20.Qc1 Qb8=) 20.Ba3?? (better 20.Ne4 Qg6 21.Bd3+–) 20...b4–/+ 21.Ne4 Qe7 22.Bb4 Qb4 (worse 22...Qe4 23.Bf8 Nf8 24.Qb1+=) 23.Rc1 Nd6?? (23...Nef6 24.Nf6 Nf6 25.Rc6–/+) 24.Nc5?? (better 24.Rb1 Qb1 25.Qb1 Ne4 26.Qe4+–) 24...Nc5–/+ 25.Rc5 Bd7 26.Bf3 Rc8 27.Qc1 Qb7 28.e4 (28.Qc2!?–/+) 28...Qb6 29.Qf4 Nb7 30.Rc4 (30.Rc2 Ra8–+ (30...Qd4?! 31.Rd2 Qc4 32.Rd7+=)) 30...Be6 (30...Na5 31.Rc1–+) 31.d5 cd5 32.Rc8 Bc8 33.ed5 Qd6 34.Qe3 Bd7 35.Qa7 Nd8 36.Qa8 Bb5 37.g3 g6 38.Kg2 Bc4 39.Qa5 Kg7?? (better 39...h6–+) 40.Qc3+– Qf6 41.Qc4 Nb7 42.Qc6 Nd6 43.h4 Qe5 44.Qc5 h5 45.Qe3 (45.Be2 Qe4 46.Kg1 Nf5 47.Qc3 Nd4+–) 45...Kf6 (45...Qe3!? 46.fe3 Kf6+=) 46.Qh6 Ke7 47.Qh7 (better 47.Qc1+–) 47...Ne4= 48.Qg8 Nf6 (better 48...Qd4 49.d6 A) worse 49...Kd6 50.Qf8 Kd7 51.Qf7 Kd8 52.Qa2+– (52.Qg6? Qf2 53.Kh3 Qf3 54.Qb6 Kd7 55.Qb5 Kd6 56.Qb4 Nc5 57.Qb6 Kd5 58.Qd8 Kc4 59.Qg8 Kc3 60.Qg7 Kc2 61.Qg6 Nd3–+); B) 49...Nd6=) 49.Qa8+– Nd7 50.Qb7 Qd6 51.Qb3 Kf6 52.Qe3 Qe5 53.Qd3 Qd6 54.Qe2 Ne5 55.Qd1 Nf3 56.Qf3 (56.Kf3?! Ke5=) 56...Ke5 (56...Ke7 57.Qe4 Kd8 58.Kf3+–) 57.Qe2 (57.Qf7 Qd5 58.Qd5 Kd5 59.Kf3+–) 57...Kd5+– 58.Qf3 (better 58.Qa2!? Kd4 59.Qf7 Qc6 60.Qf3+–) 58...Ke6= 59.Qe4 Kd7 60.Qf3 Qc6 61.g4 (61.Qc6 Kc6 62.Kf3 Kd5=) 61...hg4 Threatening mate: gxf3 62.Qc6 Kc6 63.Kg3 Kd6 64.h5?? (64.Kg4 f6=) 64...Ke6 (better 64...gh5 65.Kf4 Ke6–+) 65.h6+= Kf6 66.Kg4 g5 67.h7 Kg7 68.Kg5 Kh7 69.Kf5 Kg8 70.Kf4 Kf8 71.Kg4 Kg8 72.Kf4 Kf8 73.Kf5 Kg8 74.Kg5 Kf8 75.Kf6 Kg8 76.Ke7 Kg7 77.Kd6 Kg6 78.Kd5 f6 79.Ke4 f5 80.Kf3 Kg5 81.Kg3 Kf6 82.Kf3 Kg6 83.Ke3 Kf6 84.f4 Kg6 85.Kf3 (85.Kf3 Kf7 86.Ke2=). BeepBeepImAJeep (2770) – RomanianForce (2735), lichess.org, 2020.

4.a3 ba3 5.Na3 Nf6 6.Nf3 Be7 7.Nb5 Ra1 8.Qa1 0–0 9.Be2 c6 10.Nbd4 (10.Na7 b5–/+) 10...d5 11.0–0 c5 12.Nb3 Nc6 13.c4 Bd7 14.d4 dc4 15.Bc4 cd4 16.Nbd4 Nd4 17.Bd4 Qc7 18.Bd3 Bc6 19.Ne5 Ra8?? (19...Bd5 20.Rc1 Qd6 21.f3=) 20.Qb2 (better 20.Qa8 Be8 21.Rb1+–) 20...Nd5 (20...Bd5!?=+) 21.Nc6= bc6 22.Bg7 Ba3 23.Qd4 (23.Qa1 Qd8 24.Bb2 Bd6+=) 23...Bd6 24.Qg4?? (better 24.f4=) 24...Ne7 (better 24...f5 25.Qh4 Qg7–+) 25.Bf6+– Ng6 26.Qg5?? (better 26.Bg6 fg6 27.Qe6 Kf8 28.Kh1+–) 26...Bh2= 27.Kh1 Threatening mate... how? 27...Ra5?? (better 27...Bd6=) 28.Qh6 (28.Qh6 Be5 29.Qg7) 1–0. BeepBeepImAJeep (2745) – Lola3745 (2360), lichess.org, 2020.

4.a3 Nf6 5.ab4 Ra1 6.Ba1 Bb4 7.Nf3 Be7 8.Be2 0–0 9.0–0 d6 10.d4 c6 11.c4 Nbd7 12.Nc3 Qc7 13.Qb3 e5 14.h3 ed4 15.Nd4 Nc5 16.Qc2 g6 (16...Re8 17.Bb2=+) 17.Bb2=+ Re8 18.Ra1 Bf8 19.Ba3 Bg7 20.Bc5 (20.Bb2 Ne6=+) 20...dc5–/+ 21.Nb3 Bf5 22.Bd3 Bd3 23.Qd3 b6 24.Qe2? (24.Rd1 Nh5=+) 24...h5 (better 24...Ne4!? 25.Ne4 Ba1 (25...Re4?! 26.Ra8 Bf8 27.Qc2=+) 26.Nec5 Ra8–+) 25.Rd1–/+ Nd7 26.Na4 Ne5 27.Nb2 Kh7 28.Nd3 (28.Ra1 Qe7–/+) 28...Nd7 (28...Nc4!? 29.Ndc5 Ne3–/+ (29...bc5?! 30.Qc4 Rd8 31.Rd8 Qd8 32.Qf7=)) 29.Nf4 Nf6 30.Qc2 Qe5 31.Nd2 Qg5 (better 31...Rd8!?=+) 32.Nf3+= Qh6 33.Rd6 Ne4 (better 33...Ra8!?+=) 34.Rc6+– Nc3 35.Rb6 h4 36.Rb7 Kh8 (36...Ne4 37.Rf7 Kg8 38.Qd3+–) 37.Rf7 Ne4 38.Qa4 g5 (38...Rb8+–) 39.Qe8 Kh7 40.Qe4 (40.Qe4 Kh8 41.Ng6 Qg6 42.Qg6 g4 43.Qg7) 1–0. BeepBeepImAJeep (2535) – Bad4life (2320), lichess.org, 2015.

4.Bc4 Nf6 5.Nf3 d5 6.Bb3 c5 7.d3 b5 8.a3? (better 8.c3!?–/+) 8...c4–+ 9.dc4 bc4 10.Ba2 (10.Bc4 dc4 11.Qd8 Kd8–+) 10...ba3 11.Bc1 (11.Bc3 Ne4 12.0–0 Nc3 13.Nc3 Bc5–+) 11...Be7 12.0–0 0–0 13.Nc3 Nc6 14.Ne2 (14.Nd4 Qd7–+) 14...Ne4 15.h3 (15.Nfd4 Nb4–+) 15...Nb4 (better 15...Bc5–+) 16.Ned4 (16.Bd2–+) 16...Na2 (16...Nc3!? 17.Qe1 Nca2 18.e4–+) 17.Ra2 Nc3 18.Nc6 Qc7 (18...Na2?! 19.Nd8 Rd8 20.Bd2–+) 19.Ne7 Qe7 20.Qd4 (20.Ra3 Nd1 21.Ra8 Nc3–+) 20...Na2 (20...Ne2 21.Kh1 Nd4 22.ed4–+) 21.Qa1 Nc1 22.Rc1 a2 23.c3 (23.Nd4 Qf6–+) 23...Qa3 24.Rc2 (24.Rf1 Rb8 25.g4 f5 26.gf5 Qb2–+) 24...Qb3 25.Nd4 (25.Rc1 Rb8 26.Kh2 Qb1–+) 25...Qb1 26.Rc1 Qc1! 27.Qc1 a1Q 28.Qa1 Ra1 29.Kh2 e5 30.Nc6 Re8 31.Kg3 Rc1 32.Nb4 Bb7 33.f3 Rc3 34.e4 de4 (34...de4 35.Kf2 ef3 36.gf3 Rf3 37.Ke1 Rh3 38.Kd1 Rd8 39.Kc2 Be4 40.Nd3 Rhd3 41.Kc1 Rc3 42.Kb2 Rb3 43.Kc1 Rb1) 0–1. Abdullaevich (1810) – Fireman2420 (2095), lichess.org, 2019.

4.Be2 d5 5.Nf3 f6 6.Nd4 (6.0–0 e5–/+) 6...Bd6 7.Bh5 Kf8 (7...g6 8.Be2–/+) 8.Nb5 Be7 9.0–0 (9.a3 c6 10.Nd4 e5–/+) 9...Nh6 (9...e5!? 10.f4 c6–/+) 10.a3 c6 11.Nd4 c5 12.Nb5 (12.Nb3 Nc6=+) 12...Bd7–/+ 13.a4 g6 (13...Bb5 14.ab5 Ra1 15.Ba1–/+) 14.Be2 Nc6 15.f4 Kg7 16.f5 (16.Re1 Nf5–/+) 16...e5 (16...Nf5 17.g4 Nh6 18.g5–+) 17.Bg4? (17.fg6!? hg6 18.Bf3–/+) 17...e4 (17...Ng4 18.Qg4 Bf5 19.Rf5–+) 18.h3 Ne5 19.Be5 (19.Be2 Nf5 20.Qe1 Nd6–+) 19...fe5 20.f6 Bf6 21.Bd7 Qd7 22.d4? (22.c3–+) 22...ed4 23.ed4 (23.Rf6 Kf6 24.ed4 b6–+) 23...Rhf8 (23...Nf5 24.Qe1–+) 24.Nd2 Nf5 (24...Bd4?! 25.Nd4 cd4 26.Rf8 Kf8 27.Nb3–+) 25.Nb3 c4 (better 25...Ne3!? 26.Nc5 Qe7 27.Qd2 Nf1 28.Rf1–+) 26.Nc5 Qc6 27.Qg4 (27.Rf5 gf5 28.Nc7 Rfc8 29.Na8 Ra8–+) 27...Ne3 (better 27...Bd4 28.Nd4 Qc5 29.Kh2 Qd6 30.Kg1 Nd4 31.c3 bc3 32.Rf8 Rf8 33.Qd1–+) 28.Qd7 (28.Ne6 Kg8 29.Qf4 Nc2 (29...Qe6?! 30.Qe3 Qe7 31.Rf4–+) 30.Nf8 A) 30...Kf8 31.Nd6 Nd4 32.Qf6 Kg8 33.Rad1+– (33.Qd4?! Qd6 34.Rf6 Qd7+–); B) 30...Na1?! 31.Nd7 Bd4 32.Nd4 Qd7 33.Ra1–+; C) 30...Rf8–+) 28...Rf7 (28...Qd7 29.Nd7 Nf1 30.Nf8–+) 29.Ne6 (29.Qc6 bc6 30.Nc7 Rc7 31.Ne6 Kf7 32.Nc7 Nf1 33.Na8 Bd4 34.Kf1 Ba1–+) 29...Kg8 30.Qc6 bc6 31.Nd6 Nf1 (31...Nc2 32.Rab1–+) 32.Rf1 Rd7 33.Rf6 (33.Nc4 Bd4! 34.Nd4 dc4 35.Nc6 Ra4 36.Rb1–+) 33...Rd6 34.Kh2 (34.a5–+) 34...Ra4 (34...b3 35.cb3 cb3 36.Rf2 Re6 37.Rb2–+) 35.g4 (35.Rf8) 35...Re6! 36.Re6 Ra7 (better 36...Ra2 37.Kg3 Rc2 38.Rc6–+) 37.Rc6 1–0. Akrapovik (1605) – Rustam_Hidayat, lichess.org, 2020.

4.Be2 Nf6 5.c3 d5 6.Nf3 Bd6 7.cb4 Bb4 8.a3 Be7 9.Qc2 0–0 10.Ng5 (10.Nc3 c5–/+) 10...h6 (10...g6 11.0–0–+) 11.Bf6–/+ hg5 12.Be7 Qe7 13.h4 gh4 14.g3 f5 15.Rh4 Nc6 16.Nc3 Ra3 17.Ra3 Qa3 18.g4 Qe7 19.Rh5 Rf6 (better 19...Nb4!? 20.Qb1 c5–+) 20.gf5=+ Rh6 (20...Nb4 21.Qb3=+) 21.fe6 (better 21.Rh6!? gh6 22.fe6+=) 21...Rh5=+ 22.Bh5 Be6 23.Be2 (23.Nb5 Ne5 24.Qc7 Qg5=+) 23...Na5 (23...Qg5 24.Qa4 Qg1 25.Bf1 Bh3–+) 24.Qg6 (24.Qa4 b6=) 24...Bf7 25.Qf5 c6 26.Bd3 g6 27.Qc8 Kg7 28.Qg4 Attacks the isolani on g6 28...Nb3 29.Ne2 c5 (29...Nc5 30.Bf5=+) 30.Nf4= Increasing the pressure on the isolated pawn on g6 30...c4?? (better 30...Qd6=) 31.Bg6+– (31.Ng6?! Qa3 32.Ne5 Kf8 33.Qc8 Kg7 34.Qg4 Kf8 35.Qc8 Kg7 36.Qg4=) 31...Kf8 32.Qc8 (32.Qh3!? Qe5 33.Bf7 Kf7 34.Qd7 Kf6 35.Nd5 Kg6 36.Qb7 Qb2 37.Nf4 Kh6 38.Qc6 Kh7+–) 32...Kg7 (better 32...Qe8 33.Qf5 Kg8+–) 33.Qg4 Kf8 34.Qh3 Qf6? Black prepares d4 (34...Qe5 35.Bf7 Kf7 36.Qd7 Kg8 37.Qc8 Kg7 38.Qb7 Kh6 39.Qc6 Kg7 40.Qd5 Qd5 41.Nd5 Kf7+–) 35.Qh6 (better 35.Qc8 Ke7 36.Qb7 Kf8 37.Qb8 Ke7 38.d4+–) 35...Ke7 (35...Qg7 36.Qg5 Qa1 37.Ke2 Nc1 38.Kf3 Nb3 39.Qd8 Kg7 40.Bf7 Kf7 41.Qc7 Kf6 42.Qd6 Kg7 43.Qg6 Kf8 44.Qf5 Ke7 45.Qe6 Kd8 46.Qd5 Ke8 47.Qg8 Ke7 48.Nd5 Kd7 49.Qf7 Kd6 50.Qc7 Ke6 51.Nf4 Kf6 52.Qb6 Kg7 53.Qb7 Kh6 54.Qc6 Kh7 55.Qg6 Kh8 56.Qh6 Kg8+–) 36.Qh7+– Kd6?? (better 36...Qa1 37.Ke2 Nc1 38.Kf3 Qf6+–) 37.Qf7 (37.Bf7 Qb2 38.Qg6 Kc7 39.Nd5 Kb8 40.Qd6 Ka7+–) 37...Qf7 (37...Qa1 38.Ke2 Qh1 39.Qf6 Kc5 40.Ne6 Kb4+–) 38.Bf7 d4 (38...Nc5 39.Ke2+–) 39.Bc4 Na5 40.Be2 de3 (40...Ke5 41.Nd3 Kd5 42.Bf3 Kc4 43.Ne5 Kc5 44.Ke2+–) 41.fe3 Ke5 42.Nd3 (42.d4 Kf5+–) 42...Kf6 (42...Kd6 43.Nf2+–) 43.e4 (43.Nc5!? Ke5+–) 43...b5 (43...Kg5 44.Bf1+–) 44.e5 Ke7 (44...Kf5 45.Bf1 Ke6 46.Bh3 Kd5 47.Ke2+–) 45.Nc5 (better 45.Nb4 Nc4 46.d4 Nb6+–) 45...b4 (45...Nc6+–) 46.e6 (46.e6 Nc6 47.Bg4+–) 1–0. SendyPolgar (1735) – Amun (1735), lichess.org, 2019.

4.Be2 Nf6 5.Nf3 Be7 6.a3 ba3 7.Ba3 Ba3 8.Ra3 Ra3 9.Na3 Qe7 10.Nc4 Nc6 11.0–0 0–0 12.Ne1 (12.d4 d6=+) 12...b5 13.Nb2 b4 14.Nc4 (14.d4 e5–/+) 14...d5–+ 15.Nb2 Bb7 16.f4 Ne4 17.Ned3 Ba6 18.c4 (18.Nf2!? Be2 19.Qe2 Nf2 20.Rf2–/+) 18...dc4 19.Qb1?? (19.Bf3 Nc5 20.Nc5 Qc5 21.Qa4–+) 19...Nd2 20.Qc2 (20.Qa1 cd3 21.Re1 Nb8 22.Bd3 Bd3–+) 20...Nf1 (20...cd3 21.Qd2 de2 22.Re1–+) 21.Kf1 (21.Bf1 c3 22.Na4–+) 21...cd3 22.Bd3 Bd3 23.Nd3 Qd6 24.Qb3 (24.Nc5 e5 25.f5 Rd8–+) 24...Rd8 25.Kf2 (25.Ke2–+) 25...Qd3 26.Qa4 Qe4 27.Qa2 b3! 28.Qb2 (28.Qb3 Rd2 Mate attack) 28...Rd3 29.Qc1 h6 (29...h6 30.f5 b2 31.Qc2 Qe3 32.Kf1 Rd2 33.Qd2 b1Q 34.Qe1 Qbe1; 29...b2 30.Qc5 Rd2 31.Kg3 Rg2 32.Kh4 Rh2 33.Kg3 Qg2) 0–1. Akrapovik (1630) – bazilishek (1640), lichess.org, 2020.

4.Nf3 c5 5.c3 (5.Bb5 Nc6=+) 5...d5 6.cb4 cb4 7.Bd3 Nc6 8.0–0 Nf6 9.Ne5 Bd6 10.Nc6 (10.f4 0–0=+) 10...bc6–/+ 11.a3 c5 12.ab4 Ra1 13.Ba1 c4 (13...cb4 14.Bb5 Bd7 15.Bd7 Qd7 16.Bf6 gf6 17.Qg4–/+) 14.Be2=+ 0–0 (14...Bd7 15.d3 cd3 16.Qd3=+) 15.Bc3 (15.b5 Qc7 16.Bf6 gf6= (worse 16...Bh2 17.Kh1+–)) 15...Bd7 (15...Ne4 16.Bf3 f5 17.Na3–/+) 16.Na3 (16.d3 cd3 17.Bd3 e5=+) 16...Qa8 (16...Qc7 17.Qa1–/+) 17.Bf6 (17.Qa1 Rb8 18.Rb1 Ne4=+) 17...gf6 (17...Qa3 18.Bc3 Bb4 19.Qa1–/+) 18.Nc2 Qa2 19.Qb1 Qa6 (19...Ra8 20.e4–/+) 20.Nd4 White plans b5 (20.Qa1 Ba4=+) 20...e5 21.b5 Qa5 22.Nc6 Bc6 (22...Qd2 23.Qd1 Qd1 24.Rd1 Bc6 25.bc6–/+) 23.bc6 Rb8 (23...Rc8 24.Qf5 Rc6 25.Qf6=) 24.Qf5= Be7? (better 24...Qc7=) 25.Qd7+– Qd8? (25...Bd8 26.Bh5 Qc7 27.Bf7 Kg7 28.Bd5 Qd7 29.cd7 f5+–) 26.Bg4 (better 26.c7 Qd7 27.cb8Q Bf8 28.Ra1+–) 26...Qd7+= 27.Bd7 d4?? (better 27...Bd8+=) 28.c7+– Ra8 29.c8Q Rc8 30.Bc8 c3 (30...Bb4 31.ed4 ed4 32.Rd1+–) 31.dc3 dc3 32.Rc1 Bb4 33.Bf5 1–0. Abdullaevich (1740) – sarwan2463 (1765), lichess.org, 2019.

4.Qg4 f6 (4...Nf6 5.Qf4–/+) 5.Qh5 g6 Black launches an attack 6.Qh3 (6.Qh4 e5=+) 6...Bg7 (6...d5 7.Qg3–/+) 7.Nf3 Nh6 8.Ng5 (8.Bb5!? c6 9.Be2–/+) 8...0–0 (8...fg5? 9.Bg7 Nf7 10.Bh8 Nh8 11.Qh7+–) 9.Ne4 (9.Nf3 d5 10.Qh4 Nc6–/+) 9...Qe7 10.Be2? (better 10.Ng3–+) 10...f5 11.Bg7 Qg7 (11...Kg7?! 12.Ng3–+) 12.Ng5 Qa1 13.Qh6 The mate threat is Qxh7 13...Qg7 (13...Qb1?! 14.Bd1 Rf7 15.Nf7–/+) 14.Qh4 Nc6 (14...Ra2 15.0–0–+) 15.0–0 (15.Bc4 f4–+) 15...Ne5 (better 15...Ra2!? 16.Qc4 Ra1 17.c3–+) 16.Qb4 Nf7 (16...Ra2 17.d4 Nc6 18.Qb3–+) 17.Nf3 (17.Nf7 Qf7 18.Nc3 b6–+) 17...c6 (17...Ra2 18.d4 Ra7 19.c4–+) 18.Bc4 (18.a4 d6–/+) 18...b5 19.Bb3 Bb7 20.c4 (better 20.Qe7 Nh8 21.Qd6–/+) 20...Nd6?? (better 20...c5 21.Qb5 Bf3 22.gf3 d6–+) 21.Qd6+– bc4 22.Bc4 Ba6 23.Ba6 Ra6 24.Nc3 Rfa8 25.Ne5 (better 25.Rb1 Re8 26.Rb8+–) 25...c5+– 26.Qd7?? (better 26.Qc7 d6 27.Qg7 Kg7 28.Nf3+–) 26...Qe5=+ 27.Rb1 Qd6 28.Qb7 (28.Rb7!? Qd7 29.Rd7–/+) 28...Qd2–+ 29.Qb3 Rd8?? (better 29...Qd6–/+) 30.Qc4?? (better 30.Rd1 Qd1 31.Nd1=) 30...Rad6 (better 30...Qd3 31.Qb3 c4–+) 31.h3 Qd3 (better 31...Qc2–/+) 32.Qb3? (better 32.Qc5!? Qa6 33.a4–/+) 32...Qa6–+ 33.Kh2 (33.a4 Rd3–+) 33...Qc6 (33...Rd2 34.Rb2 R2d3 35.g3–+) 34.Qc4 Qc7 (34...Rd3 35.a4–+) 35.Nb5–/+ Qc6 (better 35...Rd4! 36.Nc7 Rc4 37.Ne6 Rd2–/+) 36.Nd6= Qd6 (worse 36...Rd6 37.Rb8 Kg7 38.Qc3 Kh6 39.Qf6+=) 37.g3 Kg7 (37...Qc6 38.a4=) 38.Rb7+= Kh6?? (better 38...Kg8+=) 39.Qh4 1–0. aravind555 – lepou, lichess.org, 2019.

4.Nf3 Nf6

5.a3 ba3 6.Na3 Nc6 7.Be2 Be7 8.0–0 0–0 9.c4 d5 10.d4 b6 11.Nb5 Ra1 12.Qa1 Na5 13.cd5 ed5 14.Ne5 c6 15.Nc3 Nd7 16.Nb1 (16.Nd7!? Bd7 17.Ba3–/+) 16...Ne5 17.de5 Bd7 (17...Nb3 18.Qa4 Nc5 19.Qc2–/+) 18.Nd2 Qc7 19.e6 Be6 (19...fe6 20.Bg7) 20.Bg7 Re8 21.Be5 Bd6 22.Bf6? (22.Bd6 Qd6 23.Rb1 Qd8=+) 22...Bf8 (better 22...Bh2!? 23.Kh1 Bd6–/+) 23.Rc1 b5 (better 23...Bb4!? 24.Be5 Qe7=+) 24.Bb5+= Rb8 (24...cb5 Exploits the pin 25.Rc7) 25.Bf1 (25.Be5 Bd6 26.Bd6 Qd6+–) 25...Nb3 (25...Bd6!? 26.Bc3 Nb7+=) 26.Nb3+– Rb3 27.Qd4 (27.Qa4 Rb4 28.Qc6 Qc6 29.Rc6 Bg7 30.Bg7 Kg7+–) 27...Rb4+= 28.Qd1 Bg7 29.Bg5 (29.Bg7 Kg7 30.Qd2 Rb6+=) 29...h6 (29...Bb2 30.Rb1=) 30.Bf4+= Qb6 Black intends d4 31.Qf3 (31.Bd6!? Rb2 32.Qa4+=) 31...Rb1= 32.Qd1 Rc1 33.Qc1 c5 34.Bd3 d4 (34...c4 35.Bc2 Qb2=+) 35.h3 (better 35.ed4!? Bd4 36.Bh6+=) 35...c4–/+ 36.Bc4 Theme: Interference (36.Qc4 Bc4) 36...de3?? (better 36...Qc6 37.ed4 Bc4–/+) 37.Be3+– Qc6 38.Be2 (38.Be6 Qe6 39.Qd2 f5+–) 38...Qe4 (38...Qc1!? 39.Bc1 Kf8+–) 39.Bf3 Qg6 40.Qd2 (40.Qc6+–) 40...h5? (40...Bh3!? 41.Qd8 Kh7=) 41.Kf1 (better 41.Qd8!? Kh7 42.Qh4+–) 41...Be5 42.Qe2 h4 43.Qd1 Bf6 44.Bg4 Qg7 (44...Bg4 45.Qg4 Kf8 46.Qb4 Kg7 47.Qd6+–) 45.Be6 fe6 46.Qg4 Qg4 47.hg4 Kg7 48.f3 Kg6 49.Bg1 Be7 50.Bh2 Bf6 51.Kf2 Be7 52.Bf4 Kf7 53.Ke3 Kg6 54.Bh2 Bf6 55.g3 (55.Ke4 Be7+–) 55...Be7 (better 55...h3!? 56.f4 Bc3+–) 56.gh4+– Bh4 57.Ke4 Kf7 58.Bf4 Be7 59.Be3 Bf8 60.Bd4 Be7 61.Be5 Bf8 62.Bf4?? (better 62.Kd4+–) 62...Bh6?? (62...Be7 63.Kd4+–) 63.Be3 (63.Bh6 Kf6 64.g5 Kf7 65.Ke5+–) 63...Bf8 64.f4 Be7 65.g5 Bf8 66.Kf3 Kg6 67.Kg4 Be7 68.Bf2 Bf8 69.Bg3 Be7 (69...Bb4+–) 70.Bh4 (better 70.Be1+–) 70...e5?? (70...Bb4 71.Kf3 Kf5=) 71.f5+– Kf7 (71...Kg7 72.f6 Bf6 73.gf6 Kg6+–) 72.g6 Ke8 73.Be7 Ke7 74.Kf3 Kf6 75.Ke4 (75.Ke4 Kg7 76.Ke5+–) 1–0. BeepBeepImAJeep (2600) – DarkApollyon (2500), lichess.org, 2016.

5.Bd3 d6 6.0–0 Be7 7.h3 (7.a3 ba3 8.Ra3 Ra3 9.Na3 e5–/+) 7...0–0 8.Nh2 (8.a3 ba3 9.Ra3 Ra3 10.Na3 e5–/+) 8...Nc6 9.Ng4 e5 10.c4 (10.Nf6 Bf6 11.Qf3 d5–/+) 10...Be6 (10...e4 11.Be2–+) 11.Be2 (11.Nf6 Bf6 12.Qc2 Kh8–/+) 11...Qd7 (11...Ng4 12.hg4 d5 13.Qc2–+) 12.d4 Bg4 13.Bg4 (13.hg4 ed4 14.ed4 d5–+) 13...Ng4 14.hg4 ed4 15.ed4 d5 16.Nd2 (16.c5 Na5–+) 16...Bf6 17.cd5 Qd5 (worse 17...Nd4 18.Ne4 Nf3 19.Qf3 Bb2 20.Rab1–/+) 18.Nf3 Rad8 (18...Ra2 19.Ra2 Qa2 20.Qc1–+) 19.Qb3 (19.a3 ba3 20.Ra3 Nd4 21.Bd4 c5–+) 19...Qb3 (19...Bd4 20.Nd4 Nd4 21.Bd4 Qd4 22.a3 ba3 23.Ra3 Qg4 24.Qb7–+) 20.ab3 Nd4 21.Nd4 Bd4 (21...Rd4?! 22.Bd4 Bd4 23.Ra5=) 22.Bd4 Rd4 23.Ra7 Rb8 (23...Rg4?! 24.Rb7 Rc8 25.Rd1–/+) 24.f3 Rd3 25.Rb1 f6 26.Kf2 Kf7 27.Kg3 (27.Rc1 Rb3 28.Rc7 Kg6 29.Rcb7 Rb7 30.Rb7 Kh6–/+) 27...g5 28.Rc1 Rd4?? (better 28...Rc3 29.Raa1 Rd8–+) 29.Rc7= Kg6 30.Rab7 Rb7 31.Rb7 h5 32.gh5 Kh5 33.Kh3 (33.Kf2!?+=) 33...f5=+ 34.Rb5 Kg6 35.Kg3 Kf6 (35...g4 36.Kf2=) 36.Kf2 f4 37.g4 (37.Ke2 Kg6=) 37...Rd2=+ 38.Ke1 Rd3 39.Rb4 Rf3 40.Rb6 Ke5 41.b4 (41.Rb5!? Ke4 42.Rb4 Ke3 43.Rc4=+) 41...Kd4 (41...Rg3 42.Rb5 Kf6 43.Rb6 Ke7 44.Rb7 Kd6 45.Rb6 Kc7 46.Rf6–/+) 42.b5 Kc5 (better 42...Rg3!?–/+) 43.Rg6= Kb5 44.Rg5 Kc4 45.Rf5 Kd4 46.g5 Ke4 47.Rf8 Rg3 48.Re8 Kf5 49.Rg8 Rg5 50.Rg5 Kg5 51.Kf2 Kf5 52.Kf3 Ke5 53.Kf2 Ke4 54.Ke2 f3 55.Kf2 Kf4 56.Kf1 Kg3 57.Kg1 f2 58.Kf1 Kf3 ½–½. Abdullaevich (1880) – Blitzjuhnke (2080), lichess.org, 2020.

5.Be2 d5 6.c3 bc3 7.Bc3 Bd7 (7...Bd6 8.Be5–/+) 8.a4 Bc5 9.0–0 h6 (9...0–0 10.a5–/+) 10.Kh1 (10.a5 Nc6=+) 10...c6 (10...0–0 11.a5–/+) 11.Ne5 Bd6 12.Nf7?? (better 12.f4–/+) 12...Kf7–+ 13.Bh5 Kf8 14.f4 Be8 15.Bf6 (15.Be2 Bg6–+) 15...Qf6 16.Nc3 Bh5 17.Qh5 Be7 (17...g6 18.Qd1–+) 18.f5 Kg8 (18...e5 19.Rab1 Ra7 20.e4–+) 19.fe6 Qg5?? (better 19...Qe6!? 20.Ne2 Nd7 21.Nf4–+) 20.Qf7 (20.Qg5!? hg5 21.Rab1–/+) 20...Kh7–+ 21.Rf3? (better 21.Rf5 Qg6 22.e4 de4 23.Raf1 Qf7 24.Rf7–+) 21...Rf8 22.Qf8 Bf8 23.Rf8 Qe5 (23...b5 24.a5–+) 24.Raf1 (24.Rb1 d4 25.ed4 Qe6–+) 24...Qe6 25.h3 Qd6 26.R1f7 Ra7 27.Ne2 (27.Re8 Qg3 28.Ree7 c5 29.Nd5 Kg8 (29...Ra4?! 30.Nf6 Kg6 31.Rg7 Kf6 32.Rgf7 Kg5 33.Rg7 Kh4 34.Rg3 Kg3 35.Rg7 Kf2 36.Rb7–+) 30.Rb7 Ra4 31.Rg7 Qg7 32.Rg7 Kg7–+) 27...Nd7 (better 27...Ra4 28.Nf4 b5 29.Re8–+) 28.Rd8 b6 (28...b5!? 29.Nd4 Qg6 30.Rdd7 Rd7 31.Rd7 ba4 32.Kh2–+) 29.Nd4 Ra4 30.Rfd7 (30.Rg7 Kg7 31.Nf5 Kf7 32.Nd6 Ke7 33.Nb7–+) 30…Ra1 0–1. Akrapovik – babichevgeniy, lichess.org, 2019.

5.Be2 Bd6 6.0–0 c5 (6...0–0 7.a3–/+) 7.d3 b6 8.Nbd2 (8.a3 ba3 9.Na3 Be7=+) 8...Bb7 9.Nc4 (9.a3 ba3 10.Ba3 0–0=+) 9...Bc7–/+ 10.h3 (10.Ncd2 0–0–/+) 10...d5 11.Nce5 Nc6 12.Nc6 Bc6 13.Ne5 Qd6 14.f4 Bb7 15.d4 (15.a3!? ba3 16.Ba3–/+) 15...c4–+ 16.c3 bc3 17.Bc3 Ne4 18.Be1 0–0 19.Qc2 (19.Bf3 Qa3 20.Qe2 f6 21.Be4 A) 21...de4?! 22.Qc4 fe5 23.Qc7 Qe3 24.Bf2 Qf4 A1) 25.Qb6? e3 26.Qb7 ef2 27.Kh1 ed4–+ (27...Qd4?! 28.Rad1 Qh4 29.Rd7–+); A2) 25.g3–/+; B) 21...fe5–+) 19...b5 20.a3 (20.Qb1 Qa3 21.Rf3 Qa6–+) 20...Ba5 Black plans c3 (20...Ra3!? 21.Rb1 Re3 22.Ng4 Re2 23.Qe2–+) 21.Qb2 Be1 22.Rfe1 Ba6 (22...f6!? 23.Ng4–+) 23.Bf3–/+ c3 (23...Ng3 24.Qb4 Rfd8 25.Rec1–/+) 24.Qb3 Rac8 25.Be4 de4 26.Rec1 f6 27.Ng4 h5 (27...Qc6 28.Ra2=+) 28.Nf2= Qc6 29.Rc2 Rc7 30.Rac1 Rfc8?? (30...Qd5 31.Qd5 ed5 32.Rc3=) 31.Nd1?? (better 31.Rc3 Qd6 32.Rc7 Rc7 33.Rc7 Qc7 34.Qe6 Kh7 35.Ne4 Qc1 36.Kh2+–) 31...b4? (better 31...Qc4!? 32.Qc4 Rc4 33.Rc3 h4=) 32.ab4 Bd3? (better 32...Qd5!? 33.Qd5 ed5 34.Rc3 Rc3 35.Nc3 g5+–) 33.Rc3+– Qb6 34.Rc7 Rc7 35.Rc7 Qc7 36.Qe6 Kh7 37.Nf2 (better 37.Qf5 g6 38.Qc5+– (worse 38.Qf6 Qc1+–)) 37...Qc1+– 38.Kh2 Qe3 39.Nd3 Qd3 40.Qf5 (better 40.Qf7 h4 41.Qh5 Kg8 42.Qh4+=) 40...g6?? (better 40...Kh6=) 41.Qf6+– e3 42.Qe7 (42.Qf7 Kh6 43.d5 Qe4+–) 42...Kh6 (42...Kg8 43.d5 e2 44.Qe8 Kh7 45.h4+–) 43.Qg5 Kh7 44.Qe7 Kg8?? (44...Kh6 45.Qe5 Kh7+–) 45.Qe8+– Kh7 46.Qe7 ½–½. Abdullaevich (1975) – Reyorben (1995), lichess.org, 2020.

5.Be2 Be7 6.0–0 0–0 7.a3 ba3 8.Na3 d5 9.c4 c6 10.d4 Nbd7 11.c5 (11.Qc2 Bb4=+) 11...b5 12.Nc2 Ra1 13.Qa1 Qc7 14.Nb4 Ne4 15.Bd3 f5 16.Qa2 Bb7 17.Ra1 h6 (17...Ra8 18.Qb1–/+) 18.Ne1 (18.Qb1 e5=+) 18...Kh7 (18...e5 19.Qb3–/+) 19.f3 White fights for the Initiative 19...Nef6 (19...Nd2 20.Bc3 Nc4 21.Qf2–/+) 20.Qa5 (20.Qb3 Ra8=+) 20...Rc8 21.Qc7 Rc7 22.Ra7 (22.Nec2 g6–/+) 22...Bd8 (better 22...Nc5!? 23.Nc6 Na4 (worse 23...Bc6 24.Rc7 Nd3 25.Nd3+–; 23...Nd3?! 24.Nd3 Bd6 25.Nce5–/+) 24.Ne7 Nb2 (worse 24...Re7 25.Ba3 Rd7 26.Bb5+=) 25.Bb5 Re7–/+) 23.Bc3 Kg8 (better 23...Nb8=+) 24.Nbc2+– Bc8 25.Ra8 Kf7 (25...Nf8 26.Ba5 Rd7 27.Bd8 (27.Rc8?! Ba5 28.Rc6 Rb7+=) 27...Rd8 28.Nb4+–) 26.Ba5 Bb7 27.Rd8 Rc8 28.Rc8 Bc8 29.Nb4 Bb7 30.f4 g5 31.g3 g4 32.Kf2 h5 33.Ke2 Ke8 34.Nec2 Nf8 35.Na1 Kd7 36.Nb3 Ng6 37.Bb6 Ba8 38.Na5 Ne7 39.Na6 Nc8 (39...Ne8+–) 40.Nc7 (40.Nc7 Ne8 41.Na8+–) 1–0. BeepBeepImAJeep (2565) – DarkApollyon (2440), lichess.org, 2016.

3.e3 Nf6

4.a3 ba3 5.Na3 e6 6.c4 Nc6 7.Nb5 Ra1 8.Qa1 d5 (8...Be7 9.Nf3–/+) 9.Nf3 Be7 10.Be2 0–0 11.cd5 ed5 12.0–0 Be6 13.Rc1 Qd7 (13...Bg4 14.Na7=+) 14.Nfd4 (better 14.Ne5!? Qd8 15.Nc6 bc6 16.Nd4+=) 14...Nd4–/+ 15.Bd4 c6 16.Nc3 Re8 17.Bf1 Bf5 18.Ne2 Bg6 19.Nf4 Qf5 (19...Rf8 20.Ng6 fg6 21.Qb2–/+) 20.Qb2=+ Bf8 (better 20...Qc8=+) 21.Qb7+– (21.Ng6?! hg6 22.Qb7 c5 23.Bf6 gf6+=) 21...Ng4 (21...c5!? 22.Bc5 Bc5 23.Rc5 Rd8+–) 22.Qc6+– h5?? (better 22...Rd8+–) 23.Qe8 h4 (23...Qe4 24.Qa8 Nf6 25.Rc8+–) 24.h3 (24.Rc8!? Qc8 25.Qc8 Nf6+–) 24...Nh6 25.Qe5 (better 25.Rc8 Qc8 26.Qc8 Bf5+–) 25...Qd7 (25...Qe5 26.Be5 Bb4 27.d3+–) 26.Rc7 (better 26.Ng6 fg6 27.Rc7 Nf7 28.Rd7 Ne5 29.Be5 Bb4+–) 26...Qa4 (26...f6 27.Rd7 fe5 28.Ng6 ed4+–) 27.Rc8 (27.Ng6!? Qd4 28.Qd4 fg6 29.Qd5 Kh7+–) 27...Qa1 28.Qg7 1–0. BeepBeepImAJeep (2770) – Psy_ko (2550), lichess.org, 2020.

4.a3 ba3 5.Na3 e6 6.c4 Be7 7.Nb5 Ra1 8.Qa1 0–0 9.Nf3 Na6 10.Be2 b6 11.0–0 Bb7 12.d4 Nb4 (12...d6 13.Qa4–/+) 13.Bc3 d5 14.cd5 (14.Qb2 Nc6=+) 14...Nfd5 (14...ed5?! 15.Qa7 Qa8 16.Qa8 Ra8 17.Nc7=+; worse 14...Nbd5 15.Bd2–/+) 15.Bb2 c6 16.Nc3 c5 (better 16...Qc7!?–/+) 17.dc5= bc5 18.Rd1 (18.Nd5!? Nd5 19.Bg7=) 18...Bf6=+ 19.e4 Nc3 (19...Bc3 20.Bc3 Nc3 21.Qc3–/+) 20.Rd8–/+ Ne2 21.Kf1 Bd8 22.Ke2 Ba6 23.Ke3?? (23.Kd1 Bg5 24.Ng5 Rd8 25.Kc1 Be2+–) 23...f6 (better 23...Nc2 24.Kf4 Na1 25.Ba1 f6–+) 24.Qc1 (24.Qa4!?=) 24...Bb6=+ 25.Kf4?? (25.Ne1 Rd8=+) 25...Rd8 (better 25...Nd3 26.Kg3 Bc7 27.Kg4 Nc1 28.Bc1 f5 29.ef5 ef5 30.Kh4 f4–+) 26.Kg3 Nd3 27.Qa1 Bc7 (27...Bb7 28.e5–/+) 28.e5 (28.Be5! Ne5 29.Qa6 Nd3 30.e5=+) 28...Bb7–/+ 29.Qa7 Rb8?? (better 29...Rd7 30.Qa4 Re7–/+) 30.Bc3+– fe5 31.Kh4?? (better 31.Ba5!? Bd6 32.Qb6+–) 31...e4 (31...h6 32.Ba5 Bd6=) 32.Ng5= Rf8?? (better 32...Nf4=) 33.Qb7+– Bd8 (33...Be5 34.Be5 Ne5 35.Ne6 Ng6 36.Kg3 Rf7 37.Qa8 Nf8+–) 34.Qg7 1–0. BeepBeepImAJeep (2650) – JSammour (2670), lichess.org, 2019.

4.a3 ba3 5.Na3 e6 6.c4 Be7 7.Nb5 Ra1 8.Qa1 c6 (8...d6 9.d4–/+) 9.Nc3 (9.Bf6 gf6 10.Na7 b6 11.Nc8 Qc8=+) 9...d5 10.Nf3 0–0 11.Be2 Nbd7 (11...dc4 12.Bc4 b5 13.Be2–/+) 12.0–0 Re8 13.d4 dc4 14.Bc4 Qc7 15.Bd3 e5 16.de5 Ne5 17.Ne5 Qe5 18.Ne4 Qe6 19.Nf6 Bf6 20.Bf6 Qf6 (20...gf6?! 21.Qa4=) 21.Qb1 g6 22.Be4 Rd8 23.Bf3 Kg7 24.Qb6 Qe7 25.h3 Be6 26.Rb1 Rd7 27.Qb2 Qf6 28.Qb6 (28.Qe2–/+) 28...Bd5 (better 28...Bh3!? 29.Qa7 Be6–/+) 29.Bd5 cd5 30.Qc5 h5 (30...Qe7 31.Qd4 f6 32.Rd1=) 31.Rd1 Attacks the isolani on d5 31...Qc6 32.Qd4 Qf6 33.Qc5 Qc6 34.Qd4 Kh7 (34...Qf6 35.Qd3=) 35.Qf4 (35.e4 b5+=) 35...Qd6 36.Qd4 b5 37.Rb1 Rb7 Black prepares the advance b4 38.e4 b4 39.ed5 b3 40.Qc4 b2 41.Qc3 Qd5 42.Rb2 Qd1 43.Kh2 Qd6 44.Kg1 Qd1 45.Kh2 Rb2 46.Qb2 Qd6 47.g3 Qe6 48.h4 f6 49.Qd2 Qe7 50.Kg2 g5 51.Qe3 gh4?? (better 51...Qe3 52.fe3 g4=) 52.Qe7 Kg6 53.Qe4 (53.Qe8 Kh6+–) 53...f5 54.Qh4 Kh6 55.Kh3 Kg6 56.f4 (56.Qe7 Kh6 57.Qf6 Kh7 58.Qf5 Kg7 59.f4 h4 60.g4 Kg8 61.g5 Kg7 62.g6 Kh6 63.Qf7 Kh5 64.Qh7) 56...Kh6 57.Qg5 Kh7 58.Kh4 Kh8 59.Kh5 Kh7 60.Qg6 (60.Qe7 Kg8 61.Kg6 Kh8 62.Qd8) 60...Kh8 61.Qf6 (61.g4 fg4 62.Kh6 g3 63.Qe8) 61...Kh7 62.Qe7 Kg8 63.Kg5 (63.Kg6 Kh8 64.Qd8) 63...Kh8 64.Kg6 Kg8 65.Qe8 (65.Qd8) 1–0. BeepBeepImAJeep (2800) – Hayk0ss (2600), lichess.org, 2020.

4.a3 e6 5.ab4 Ra1 6.Ba1 Bb4 7.Nf3 Be7 8.Be2 d6 9.0–0 e5 10.d4 ed4 11.Nd4 0–0 12.c4 Nbd7 13.Nd2 Ne5 14.N2f3 Nf3 15.Bf3 c6 16.Qb3 Qc7 17.Bb2 Rd8 18.Rc1 h6 19.h3 Nd7 20.Ba3 Bf6 21.Nf5 Ne5 22.Nd4? (better 22.Be4–/+) 22...c5–+ (22...Nf3?! 23.Nf3 Be6 24.Bb2 Bb2 25.Qb2–/+) 23.Nb5 Nf3 24.gf3 Qd7 25.Kf1 (25.Na7 Qh3 26.Nc8 Qc8–+) 25...Qh3 26.Ke2 Re8?? (better 26...Bh4 27.Qd1 Qh2–+) 27.Nd6= Exerts pressure on the backward pawn 27...Rd8 28.Nc8 (28.Bc5 Qd7=) 28...Rc8 (better 28...Qc8!? 29.Rb1 Rd7–/+) 29.Qb7=+ Rd8 (29...Qe6 30.Qb5=+) 30.Bc5= Qh5 (better 30...Qf5 31.Qb4 Qd3 32.Ke1 Qf5=) 31.Rd1?? (better 31.Bb6 Re8 32.c5+–) 31...Qc5 Threatening mate... how? 32.Rd8 Bd8 33.Qb3 Bb6 34.Qd3 Kf8 35.f4 Ke7 36.Kf3 Qd6 37.Qh7 Qc6 38.Kg3 Qg6 39.Qg6 fg6 40.Kg4 Kf6 (better 40...h5 41.Kf3 Kd6–+) 41.f3?? (41.Kg3–+) 41...Be3 42.Kg3 Kf5 43.Kg2 Bf4 (43...Kf4 44.c5 Bc5 45.Kf1 Kf3 46.Ke1–+) 44.Kf2 Bd6 45.Kg2 Bc5 46.Kg3 (46.Kh3–+) 46...g5 47.Kg2 h5 48.Kh3 g6 49.Kg2 Kf4 50.Kf1 Kf3 51.Ke1 h4 52.Kf1 (52.Kd2 h3 53.Kc3 h2 54.Kb2 h1Q 55.Kc2 Qg2 56.Kc3 Ke2 57.Kc2 Qb7 58.Kc3 Qb4 59.Kc2 Bd4 60.c5 Qb2) 52...h3 (52...Bf2 53.c5 g4 54.c6 g3 55.c7 g2) 53.Ke1 h2 54.Kd2 (54.Kd1 h1Q 55.Kc2 Qh2 56.Kc3 Qa2 57.Kd3 Qb3 58.Kd2 Be3 59.Ke1 Qb1) 54...Be3 (54...h1Q 55.Kc2 Qg2 56.Kc3 Ke3 57.Kb3 Kd3 58.Ka4 Kc4 59.Ka5 Qa8) 55.Kc3–+ h1Q 56.Kb4 (56.c5 Qh8 57.Kb3 g4 58.c6 Qb8 59.Kc4 g3 60.c7 Qc7 61.Kd5 g2 62.Ke6 g1Q 63.Kd5 Qd1 64.Ke6 Qdd6) 56...Qc1 (56...Qb1 57.Ka3 Bc5 58.Ka4 Qb4) 57.Kb5 Ke4 (57...Qb2 58.Kc6 Qb6 59.Kd7 Bc5 60.Kc8 g4 61.Kd7 Qb7 62.Kd8 g3 63.Ke8 Qe7) 58.c5 (58.Kc6 Qc4 59.Kd7 Qd5 60.Ke8 g4 61.Kf8 Qd7 62.Kg8 Bh6 63.Kh8 Qg7) 58...Qc5 59.Ka4 Kd4 60.Kb3 Qc3 (60...Bc1 61.Ka4 g4 62.Kb3 Qc4) 61.Ka2 (61.Ka4 Qb2 62.Ka5 Kc4 63.Ka4 Qb4) 61...Qb4 (61...Bc1 62.Kb1 Qb2) 62.Ka1 Kc3 63.Ka2 Qb2 0–1. BeepBeepImAJeep (2470) – Bad4life (2315), lichess.org, 2017.

4.a3 g6 5.ab4 Ra1 6.Ba1 Bg7 7.b5 0–0 8.c4 c6 9.Nf3 cb5 10.cb5 d5 11.Be2 Nbd7 12.0–0 e5 (better 12...Nb6!?=) 13.Ne5+– Ne5 14.Be5 Qa5 15.Nc3 Qd8 16.Bd4 Re8 17.f4 (17.Bf3!? Be6+–) 17...Ne4+– 18.Bg7 Kg7 19.Qc2 Qf6? (better 19...Nc3 20.Qc3 d4+–) 20.Nd5+– Qd6 21.Bc4 Bf5 22.Qb2 f6 23.d3 Nc5 24.e4 Be6 (24...Bg4+–) 25.Qf6 Kg8 26.f5 Nd7 27.Qg5 (better 27.Qd4 Bd5 28.Bd5 Kf8 29.fg6 Ke7 30.gh7 Nf6+–) 27...Bd5 28.Bd5 Kg7 (28...Kh8 29.fg6 Qg6 30.Qg6 hg6 31.d4+–) 29.fg6 hg6 (29...Rf8 30.gh7 Kh7 31.Qh5 Kg7 32.Rf8 Nf8 33.Qf7 Kh6 34.Qb7 Qc5 35.Kf1 Qc1 36.Ke2 Ng6+–) 30.Rf7 (30.Rf7 Kg8 31.Rd7 Qd5 32.Qg6 Kh8 33.Qg7) 1–0. BeepBeepImAJeep (2790) – Fire_on_board7 (2525), lichess.org, 2020.

4.a3 g6 5.ab4 Ra1 6.Ba1 Bg7 7.b5 0–0 8.c4 c6 9.Nf3 d5 10.Be2 dc4 11.Bc4 cb5 12.Bb5 Qa5 13.Nc3 Ne4 (13...Bd7 14.Bd7 Nbd7=) 14.Be2 (better 14.Qa4!? Qa4 15.Ba4=) 14...Nc3–/+ 15.dc3 Bc3 16.Bc3 Qc3 17.Qd2 Qd2 18.Nd2 Rd8 19.Nf3 Nc6 20.0–0 Bg4 21.Rb1 Rb8 (21...e5 22.h3 Bc8 23.Bc4–/+) 22.h3 Bf3 23.Bf3 Nd8 24.Rb6 Rc8 25.g4 (25.Bb7? Rb8–+ (25...Nb7?! 26.Rb7 e5 27.g4=)) 25...Rc7 26.Kg2 Kf8 27.g5 e6 28.h4 Ke7 29.Be4 Nc6 30.f4 Nd8 31.Kf3 Kd7 32.Rb4 Kc8 33.Bd3 Nc6 34.Rb1 Ne7 35.Be4 Nc6 (35...Nf5 36.h5=+) 36.Bc6 (36.Bd3 Kd8=+) 36...bc6=+ 37.h5 c5 38.h6 c4 39.Ke4 c3 40.Kd3 (40.Rc1!?=) 40...Kd7 41.Rc1 (41.Kc2 e5=+) 41...e5 42.fe5 (42.Kc2 Ke6 43.Rb1 ef4 44.ef4 Kf5–+) 42...Ke6–+ 43.Ke4 Rc4 (better 43...c2–+) 44.Kf3? (better 44.Kd3 Rc5 45.Kd4 Rd5 46.Kc4–+) 44...Ke5 (44...Kf5 45.Rc2–+) 45.Rc2 (45.e4–+) 45...Kf5 46.e4 Kg5 47.Ke3 Kh6 48.Kd3 Rc7 49.Rh2 Kg7 50.Kc2 h5 51.Rf2 Re7 (51...g5 52.e5 h4 53.Rf5–+) 52.e5 Re5 53.Kc3 Rf5 54.Rg2 g5 55.Kd4 Kg6 56.Ke4 h4 57.Ke3 Rf4 58.Rh2 f6 59.Rh1 Kh5 60.Rg1 h3 Black plans g4 61.Rg3 (61.Re1 f5 62.Rd1 Kh4–+) 61...Kh4 62.Rg1 Rg4 63.Rh1 Rg2 64.Kf3 (64.Ke4 Kg3 65.Rc1 h2–+) 64...g4 65.Kf4 (65.Ke3 h2 66.Kd3 g3–+) 65...h2 66.Rd1 Rg1 67.Ke4 Rd1 68.Kf5 h1Q 69.Kg6 (69.Kf6 Qc6 70.Ke5 Rd5 71.Kf4 Qf6 72.Ke3 Qf3) 69...Qf3 (69...Qc6 70.Kf7 Rd7 71.Kg6 Qe6 72.Kh6 f5) 70.Kf7 g3 (70...Rd7 71.Ke6 Qd5 72.Kf6 Rf7 73.Kg6 Qe6) 71.Kg7 (71.Ke7 Qe3 72.Kf6 Rf1 73.Kg6 Qe7 74.Kh6 Rf6) 71...g2 (71...Rd7 72.Kg6 g2 73.Kh6 Qh5) 72.Kg6 (72.Kf7 Rd7 73.Ke6 Qd5 74.Kf6 Rf7 75.Kg6 Qe6) 72...g1Q 73.Kf7 Qb6 74.Kg6 (74.Kf8 Qc7 75.Ke8 Rd8) 74...f5 (74...Rd7 75.Kh6 f5) 75.Kg7 Qd5 (75...Rd7 76.Kf8 Qd8) 76.Kf8 Qdb7 77.Kg8 (77.Ke8 Qd8) 77…Rd8 (77...Qd8) 0–1. BeepBeepImAJeep (2765) – Yarebore (2830), lichess.org, 2020.

4.Bc4 e6 5.Ne2 d5 6.Bb3 c5 7.d3 b5 8.c4 (better 8.c3–/+) 8...Be7 (better 8...dc4 9.dc4 Qd1 10.Kd1 bc4 11.Bc4 Ne4–+) 9.cb5=+ Bd7 (better 9...Qc7=+) 10.0–0? (better 10.a4!?=) 10...Bb5–/+ 11.Nd2? (11.a3 Nc6–/+) 11...0–0 (11...Bd3 12.Re1–+) 12.Nf4? (12.Qc2 Nc6–/+) 12...Nbd7 (12...g5 13.a4 Ba6 14.Ne2 Bd3 15.Bc2 Bc2 16.Qc2–+) 13.Re1 (better 13.Qf3–+) 13...g5 14.Nh3 Bd3 15.Ng5 Bg6 16.Ndf3 c4 17.Bc2 c3 18.Bg6 fg6 (18...hg6 19.Bc1–+) 19.Bc1? (19.Bc3 bc3 20.Ne6–/+) 19...b3?? (better 19...Nc5–+) 20.Qb3= Qc7 (20...Rb8!? 21.Qc2 Nc5=) 21.Ne6+= Qd6?? (better 21...Nc5 22.Nc5 Qc5+=) 22.Nf8+– Bf8 (22...Rf8 23.Qc3 Ng4 24.h3 Nf2 25.Kf2+–) 23.Qc3 Bg7 (23...Ne4 24.Qc2+–) 24.Nd4 (24.Bb2!? Rb8+–) 24...Ne4 25.Qb3 Ndc5 26.Qb4 (26.Qc2 Be5 27.h3 Na6+–) 26...Nd3? (better 26...Nf2 27.Rf1 Ng4+–) 27.Qd6 Nd6 28.Rd1 Nb4 (28...Bd4 29.ed4 (29.Rd3 Ba1 30.Rd5 Nc4–/+) 29...Nc1 30.Rdc1+–) 29.a3 Nc6 (29...Bd4 30.Rd4 (30.ab4?! Ba1 31.Rd5 Rc8=+) 30...Nc2 31.Rd5 Na1 32.Rd6+–) 30.Bb2 Nc4 31.Bc3 (31.Nc6 Bb2 32.Ra2 Kf7+–) 31...Ne7 (31...Bd4 32.Bd4 (32.ed4?! Ra3 33.Ra3 Na3+–; 32.Rd4?! Nd4 33.Bd4 Ra3+–) 32...Kf7 33.a4+–) 32.Bb4 (32.a4 Kf7+–) 32...Nc8 33.Ra2 N4b6 (33...N8b6 34.Kf1+–) 34.Ne6 Kf7 (34...Be5 35.Rc2 Na7 36.f4+–) 35.Ng7 Kg7 36.Bc5 (36.Rc2!? h6+–) 36...Kf7 37.Bb6 (37.Rc2 Ke8+–) 37...Nb6 38.a4! Ra6 (38...Ra4 39.Ra4 Combination; 38...Na4 39.Rd4 Double attack (39.Rd5 Deflection; 39.Rd4 Decoy)) 39.a5 Nc4 (39...Ke6 40.f3+– (worse 40.ab6 Ra2 41.Rb1 Ra8+–)) 40.Rd5 Ke6 (40...h6 41.Rc5 Nd6 42.f3+–) 41.Rc5 Rd6 (41...Nd6 42.f4+–) 42.g3 Ne5 43.Re5! Ke5 44.a6 Rd8 45.a7 Ra8 46.Kg2 (46.f4 Kd5+–) 46...g5 47.Ra6 h5 (47...g4 48.h3 gh3 49.Kh3+–) 48.h3 (48.f4!? Ke4+–) 48...Kf5 49.Ra5 Kf6 50.e4 h4 (50...g4 51.f3+–) 51.gh4 gh4 52.f4 Ke6 53.Kf3 Kf6 54.Kg4 Rg8 55.Kh4 Rh8 56.Kg3 Rg8 57.Kf3 Ra8 58.h4 Kg6 59.Ra6 Kh5 (59...Kf7 60.f5+–) 60.Kg3 (60.e5 Rc8 61.a8Q Ra8 62.Ra8 Kg6 63.Ra6 Kf7 64.Rf6 Ke7 65.h5 Kd7 66.h6 Kd8 67.h7 Ke7 68.h8Q Kd7 69.Qg7 Ke8 70.Rf8) 60...Rg8 61.Kh3 Ra8 (61...Rg3 62.Kh2 Rh3 63.Kg2 Rg3 64.Kf2+– (64.Kg3?!)) 62.e5 1–0. Abdullaevich (1780) – khurbon (1930), lichess.org, 2019.

4.Nf3 d5 5.Be2 e6 6.0–0 Bd6 7.d4 (7.a3 0–0–/+) 7...0–0 8.a3 ba3 (8...Nc6 9.ab4 Ra1 10.Ba1 Nb4 11.Nbd2–/+) 9.Na3 Ne4 (9...b6 10.c4–/+) 10.Nb5 Ra1 11.Qa1 Be7 12.c4 c6 (12...Bd7 13.Rc1+=) 13.Nc3 Nc3 14.Bc3 b6 15.c5 (15.Qa7 Nd7+=) 15...bc5 16.dc5 f6 17.Rb1 Bc5? (better is 17...Nd7!? 18.Nd4 Ne5= (worse is 18...Bc5 19.Ne6 Qe7 20.Nf8 Nf8 21.Qa8+/–)) 18.Rb8+/– e5 19.Bb4 Bb4 20.Rb4 c5 (20...Bf5 21.Rb3+/–) 21.Rb5+– c4 22.e4 Be6 (22...de4!? 23.Bc4 Kh8+/–) 23.ed5+– Bd5 24.Qc3 Kh8 25.Bc4 Bc4 26.Qc4 Qd1 27.Qf1 Rd8 28.Rb1 Qc2 (28...Qd5 29.Qe2+–) 29.Rc1 Qf5 (29...Qb3 30.Nd2 Qd5 31.Nc4+–) 30.Rd1 (30.Rd1 Rd1 31.Qd1+–; 30.Qc4 Qd7+–) 1–0. Dopper,Johan – Gnuechtel,Andreas, corr TKM/A004, 2000.

4.Nf3 g6 5.a3 ba3 6.Ra3 Ra3 7.Ba3 Bg7 8.c4 0–0 9.h4 (9.d4 d6–/+) 9...d5 (9...d6 10.d4–/+) 10.Qc2 (10.cd5 Bg4=+) 10...dc4 11.Bc4 Bf5 12.Qb3 Bb1 (better 12...Nc6!? 13.Qb5 Qd7–/+) 13.Qb1= b6 (13...Nc6 14.Qb7 Qa8 15.Qa8 (15.Qc7? Rc8 16.Qb6 Qa3–+) 15...Ra8 16.Bb2=) 14.Ng5 (14.h5 gh5 (14...Nh5? 15.Rh5 Nd7 16.Rh3+–) 15.e4 h6+=) 14...Nbd7 (14...Nc6=+) 15.Qb3 (15.d4!?=) 15...Qe8 (15...Ne5 16.Bb5 Qd5 17.Qd5 Nd5 18.Bb2–/+) 16.f4 (16.d4 c5=+) 16...Nc5 (16...c5 17.d4–/+) 17.Qa2 (17.Bc5 bc5 18.h5 gh5= (18...Nh5? 19.Rh5 e5 20.Qd3+–)) 17...h6 18.Nf3 Qd7?? (better 18...Nfe4=+) 19.Ne5+– Qf5 (19...Qe8 20.Bc5 bc5 21.Ng6 c6+–) 20.g4?? (better 20.Bc5 bc5 21.Bf7 Rf7 22.Qf7 Kh7 23.d3+–) 20...Ng4–/+ 21.Ng4? (21.Nf7 e6 22.Ng5=+) 21...Qg4–+ 22.d4?? (22.Bc5 Qg3 23.Kf1 Qf3 24.Kg1 bc5–+) 22...Qg3 (better 22...Qf3 23.Rh2 Qe3 24.Re2 Qg1 25.Kd2 Qd4 26.Kc2–+) 23.Kd2?? (23.Qf2 Qf2 24.Kf2 Ne4 25.Ke1–+) 23...Ne4 (better 23...Qg2 24.Be2 Ne4 25.Kd3 Qh1–+) 24.Kc1 (24.Kc2 Qg2 25.Kd3 Qa2 26.Ba2 Nf2 27.Kd2 Nh1 28.Be7–+) 24...Qe3 25.Kb2 Qc3 (better 25...Bd4 26.Kb1 Nc3 27.Kc2 Qf2 28.Kd3 Qf3 29.Kd2 Na2 30.Ba2–+) 26.Kb1 Nd2 (26...Nd2 27.Qd2 Qd2–+) 0–1. AhmedSultanov (1830) – steel1982 (1905), lichess.org, 2019.

3.Nf3 b6

4.e3 Bb7 5.Be2 Nc6 6.0–0=+ Nf6 7.c3 e6 8.cb4 Nb4 9.a3 Nc6 10.Nc3 Be7 11.Ne4?? (better 11.d3–/+) 11...Ne4–+ 12.Bg7 Rg8 13.Bb2 Bf6 (13...f5 14.d4–+) 14.Bf6 (14.d4 Ne7–+) 14...Qf6 15.Bd3 (15.g3 e5–+) 15...Ne5 (better 15...Nb4! 16.Be2 Nd2 17.Qd2 Bf3 18.g3–+) 16.Ne5 Qe5 17.Qf3 (17.f3 Nc5 18.Be2 Bd5–+) 17...f5 (better 17...Nc5 18.e4 Nd3–+) 18.Qh5 Kd8 19.f4 (19.Be4 Be4 20.Qh4 Ke8 21.Qh5 Kf8–+) 19...Qd5 (better 19...Nd2 20.fe5 Rg2 21.Kh1 Rg5 22.e4 Rh5 23.Rf4 fe4 24.Be2 e3 25.Kg1 Rg5 26.Rg4 Rg4 27.Bg4–+) 20.Be4 (20.Qf7 Nf6! 21.Qf6 Ke8 22.e4 Qd3 23.Rae1 Qd2 24.g3 Ra3 25.Qh4–+) 20...Qe4 21.Qh4 (21.Qf3 Qf3 22.Rf3 Bf3 23.g3–+) 21...Kc8 22.Qf2 (22.Qd8 Kd8 23.Rf2 Rg2 24.Kf1 Qd3 25.Ke1 Rg1 26.Rf1 Qf1) 22…Rg2 (22...Rg2 23.Kh1 Rf2 24.Kg1 Qg2) 0–1. aravind555 – Tomii10987, lichess.org, 2018.

4.e4 Bb7 5.d3 d6 6.Nbd2 e5 (6...Nf6 7.Bf6 ef6 8.d4–/+) 7.Be2 Nd7 8.0–0 Ngf6 9.Re1 Be7 10.Bf1 0–0 11.Nc4 (11.d4 d5–/+) 11...b5 12.Ne3 g6 (12...Nc5 13.Qd2–/+) 13.Ng5 h6 14.Nf3 Kh7 15.Qd2 Nc5 (15...Ra4 16.Bc1–/+) 16.Qb4=+ Ra4 17.Qd2 (17.Qb5? c6 18.Qc5 dc5 19.Ne5 Nd7–+) 17...Ra8 (17...Qa8 18.Nd1=+) 18.Nd1 Qd7 19.Nc3 Nh5 (19...Rfb8 20.d4 b4 21.Bc1 ed4 22.Qh6 Kg8 23.Nd5 Nd5 24.ed5 Bd5 25.Bb2=+) 20.g3 (20.Bc1 g5+=) 20...Qg4 (20...f5!? 21.Bh3 Qc6=+) 21.Bg2= f5?? (21...Na4 22.Na4 Ra4+=) 22.Nb5 (better 22.h3 fe4 23.hg4 ef3 24.gh5+–) 22...fe4=+ 23.de4 Ne4 24.Qb4 (24.Qe3 Neg3 25.fg3 Bf3 26.Bc1–/+) 24...Rab8?? (24...Nf4 25.Ne5 Ne2 26.Re2 Qe2–+) 25.Nc7?? (better 25.Ne5 Qf5 26.Nd3+– (worse 26.Re4 Qf2 27.Kh1 c5=+; 26.Be4?! Qf2 27.Kh1 c5=)) 25...Nf2!–+ (25...Rf3?! 26.h3 Qd7 27.Bf3 Qc7 28.Be4 Be4 29.Qe4 Rb2 30.Qd5 Qc2 31.Qf7 Ng7 32.Rec1–/+) 26.Qg4 (26.Kf2 Rf3 Double attack (26...Qb4 Discovered attack)) 26...Ng4 27.Ne6 Rf3 (27...Bf3?! 28.Nf8 Rf8 29.h3=) 28.Bf3 Bf3 29.Bc3?! (29.Bc1 Bf6 30.Bd2 Rb2–+) 29...e4 (29...Rc8!? 30.Bd2 Bd5 31.h3 Be6 32.hg4 Bg4 33.Rab1 Ng3 34.Rb7–+) 30.Nd4? (better 30.Rab1 Rb1 31.Rb1–+) 30...Rc8?? (30...Bg5 31.a4–+) 31.Bb2?? (better 31.Nf3 Rc3 32.Re4=+) 31...d5 (better 31...Bg5!? 32.a4 Be3 33.Re3 Ne3 34.a5–+) 32.Nf3 ef3?? (better 32...Rc2 33.Bd4 A) 33...ef3 34.Re7 Kg8 35.Rb1 Rg2 36.Kf1 Nh2 37.Ke1 Re2 38.Re2 fe2 39.Rb3+– (39.Ke2?! Ng3 40.Kd3 Nf3=); B) 33...Bf6 34.Bf6 ef3 (34...Nhf6?! 35.Nd4 Rd2 36.Red1 Rh2 37.Rdc1–/+; 34...Ngf6?! 35.Nd4 Rc4 36.Red1=) 35.Re7 Kg8–+) 33.Rf1?? (better 33.Re7 Kg8 34.Rc1+–) 33...Bc5 (better 33...Rc2 34.Rf3 Bc5 35.Kf1 Nh2 36.Ke1 Nf3 37.Kd1 Rb2 38.Kc1 Ba3 39.Rb1 Rd2 40.Rb2 Ng3 41.Kb1 Rb2 42.Ka1 Rc2 43.Kb1 Rc1) 34.Kh1 Nf2 (34...Re8 35.Rfe1 Nf2 36.Kg1 Nd3 37.Kf1 Re1 38.Re1 Nb2 39.Rb1–+) 35.Rf2 Bf2 36.Be5 Rc2 37.Rf1 (37.g4 Re2 38.gh5 Re5–+) 37...Re2 (better 37...Ra2 38.g4 Ng7 39.Bg3 Bg3 40.hg3–+) 38.Bf4 (38.g4 Re5 39.gh5 d4–+) 38...Re1 (better 38...d4 39.Bd6–+) 39.Re1 Be1 40.Kg1 (40.Be5 Ng7 41.Kg1–+) 40...f2 41.Kf1 Nf4 42.gf4 d4 43.h4 Kg7 44.Ke2 Kf6 45.f5 d3! (45...d3 46.Kd3 f1Q 47.Kd4 Qf2 48.Kc4 Qa2 49.Kc5 Bf2 50.Kb4 Qd2 51.Kb3 gf5 52.Kc4 Qc2 53.Kb4 Be1 54.Kb5 Qb3 55.Kc5 Ke6 56.Kc6 Ba5 57.Kc5 Qd5) 0–1. alessandrocarvalhaes (1940) – VilleDEngineCrusher (1900), lichess.org, 2020.

3.Nf3 c5

4.a3 Nc6 5.ab4 Ra1 6.Ba1 Nb4 7.c3 (better is 7.Bc3+=) 7...Na2?? (better is 7...Nc6–/+) 8.Qb3+– Qa5 9.Na3 1–0. Fournier,Frederic (1990) – NN, Active, 2004.

4.e4 b6 5.Bc4 Bb7?? 6.Ng5 (better 6.Bf7 Kf7 7.Ne5 Ke8 8.Qh5 g6 9.Ng6+–) 6...e6–/+ 7.Qf3?? (better 7.f4–/+) 7...Qg5–+ 8.0–0 f5 9.d3 Nf6 10.Nd2 (10.Re1 Bd6–+) 10...Be7 (better 10...Qd2 11.Bf6 gf6 12.Qh5 Ke7 13.ef5–+) 11.Rfd1 Nc6 (11...Bc6 12.Bb3–+) 12.ef5 ef5 13.c3 Na5 14.Qe2 (14.Qh3 Nc4 15.dc4 bc3 16.Bc3 0–0–+) 14...Nc4 (14...Qg2) 15.Nc4 (15.f4 Qh5 16.Qh5 Nh5 17.Nc4 d5–+) 15...bc3 (15...Qg2) 16.f3 (16.Nd6 Kf8 17.Nb7 cb2 18.Qb2–+) 16...cb2 17.Rab1 b5 (better 17...Nd5 18.Nd6 Kf8 19.Nb7–+) 18.Ne5 (18.Nd6 Kf8 19.Nb7 Ra7–+) 18...0–0 (18...Ra2!? 19.Rb2 Rb2 20.Qb2–+) 19.Rb2 Bd6 (19...b4 20.a3–+) 20.Rb5 Ba6 21.Rb6 Be5 22.Qe5 Rfe8 23.Qc5 (23.Qg3 Qe3 24.Qf2 Bd3 25.Qe3 Re3–+) 23...Rac8 (better 23...Re2 24.Qf2 Rf2 25.Kf2 Nd5–+) 24.Qa5 (24.Qf2 Bd3 25.h4–+) 24...Qe3 (24...Re2 25.Qd5 Nd5 26.g3 Qe3 27.Kh1 Qf3 28.Kg1 Qg2) 25.Kf1 Bd3 26.Rd3 Qd3 (26...Rc1 27.Rd1 Rd1 28.Qe1 Re1) 27.Kf2 Re2 (27...Ne4 28.fe4 Rc2 29.Qd2 Qd2 30.Kg3 Qg5 31.Kf3 fe4) 28.Kg3 Nh5 (28...Rg2 29.Kg2 Rc2 30.Kg3 Nh5 31.Kh4 Rh2 32.Kg5 Qe3 33.Kf5 Qf4) 29.Kh4 Qd4 30.Kh5 g6 31.Kg5 (31.Rg6 hg6 32.Kh6 Qg7 33.Kg5 Rg2 34.Kh4 Qh6) 31...Rg2 32.Kh6 Qh4 (32...Qf4) 0–1. alessandrocarvalhaes (1870) – Daniel_Mondares05 (1955), lichess.org, 2020.

4.e4 Nc6 5.Bc4 e6 6.0–0 Nge7 7.Re1 f6 8.Nh4 Kf7 9.Qh5 Ng6?? (better 9...g6 10.Qf3 Bg7=+) 10.Ng6+– hg6 11.Qh8 Qc7 (11...d5 12.Bf1+–) 12.Qh4 Bd6 13.g3 (13.a3 Be5 14.Be5 Ne5+–) 13...b6 (13...Be5 14.Be5 Qe5 15.c3+–) 14.Qh3 (14.f4 Bb7+–) 14...Bb7 15.Qg2 (15.f4 Nd4 16.Bd4 cd4+–) 15...Rh8 16.Be2 Ne5 (16...Ke8 17.a3+–) 17.Be5 (better 17.f4!? Nc6+–) 17...Be5 18.c3 f5 19.d4! cd4 20.ef5?? (20.f4 Bf6 21.Bf3 (21.cb4?! d3 22.Bd3 Bd4 23.Kh1 Ba1=) 21...fe4 22.Be4 Be4 23.Qe4 (worse 23.Re4 dc3 24.Qc2 Ra8=+) 23...dc3 24.Qc2+= (worse 24.Qb4 c2 25.Rc1 Ba1–+)) 20...Bg2–+ 21.fg6 (21.fe6 de6 22.Kg2 dc3–+) 21...Kg6 (better 21...Kf6 22.f4 Bh3 23.Nd2 dc3 24.Ne4 Kf5 25.Bd3 Bd4 26.Kh1–+) 22.Bd3 Kf6 23.Kg2 Qc6 (worse 23...bc3 24.Na3–+) 24.Be4 d5 25.Bf3 (25.Bc2–+) 25...dc3 26.Rc1 (26.Re2 c2 27.Na3 Ba1 28.Nc2 Bc3–+) 26...Qc4 (better 26...c2 27.Nd2 Ba1 28.Ra1–+) 27.a3 (27.Nd2 Qd3 28.Nb3 c2–+) 27...Qd3 (better 27...c2!? 28.ab4 Ba1 29.Na3–+) 28.ab4 d4 (better 28...c2 29.Nc3 Rc8 30.Ne2 Ba1 31.Ra1–+) 29.Na3 Rh2! 30.Kh2 Qf3 31.Rf1 d3 32.Nc4 Bd4 33.Ne3 Be3 (better 33...d2!? 34.b5–+) 34.fe3 (34.fe3 Qf1! 35.Rf1 Ke5 36.Rc1–+). alessandrocarvalhaes (1885) – Bolandot423 (1915), lichess.org, 2020.

4.Ng5 Nf6 (4...e5 5.Ne4 d5 6.Ng3–/+) 5.e4 d6 (5...h6 6.Bf6 ef6 7.Nf3–/+) 6.e5 (6.Bb5!? Nc6 7.Qe2=+) 6...de5–/+ 7.Be5 Nc6 8.Bb2 h6 (8...Qd5!? 9.Nf3 Bf5–+) 9.Nf3–/+ g6 10.Bc4 Bg7 11.0–0 0–0 12.Re1 Bg4 13.h3 Bf3 14.Qf3 Nd4 15.Qd3 e5 16.c3? (16.Re5 Nd7 Decoy) 16...e4–+ 17.Re4 (17.Qf1 Nc2 18.cb4 Ne1 (worse 18...Na1 19.Ba1 cb4 20.Bf6 Qf6 21.Re4–+) 19.Qe1 cb4–+) 17...Ne4 18.Qe4 (18.cd4 Re8 19.Bb5–+) 18...Nc6 (better 18...Re8!? 19.Qg6 Re1 20.Kh2 Qc7 21.g3 Nf3 22.Kg2–+) 19.d3 (better 19.Qg6 Ne5 20.Qe4 Nc4 21.Qc4–+) 19...Re8 20.Qg4 (20.Qg6 Ne5 21.Bf7 Kf8 22.Qh5 Nf7 23.Qd1–+) 20...Re1 (20...Ne5 21.Bf7 Kf7 22.Qf4 Kg8 23.d4–+) 21.Kh2 Qd6 (better 21...b5 22.Bf7 Kf7–+) 22.g3 (22.f4 Ne5! 23.Qg3 Nc4 24.dc4 Rae8–+) 22...bc3 (better 22...Ne5 23.Bf7 Kf7 24.Qf4 Ke6–+) 23.Nc3 Ra1 (better 23...Ne5 24.Qf4 Ra1 25.Ba1–+) 24.Ne4? (24.Ba1 Ne5 25.Qe2 Nc4 26.Ne4–+) 24...Qe7 (24...Bb2?! 25.Nd6 Ne5 26.Qe4 Nc4 27.Qc4+=) 25.Qg6 Nd4 (better 25...Ne5 26.Be5 Qe5 27.Qf7 Kh8 28.Qb7 Rf8–+) 26.Qg7?? (better 26.Ba1 Rd8 27.Qb6=) 26...Kg7–+ 27.Bd4 (27.Ba1 f5 28.Bd5–+) 27...cd4 28.g4 R1a2 29.Kg3 Qe5 30.f4 Qa5 31.g5 (31.Ba2 Qe1 32.Kh2 Ra2 33.Nf2 Qf2 34.Kh1 Qe1) 31...h5 (31...Qe1 32.Kf3 Qe3 33.Kg4 Rg2 34.Kh4 hg5 35.Ng5 Qf4 36.Kh5 Rg5) 32.Kh4 (32.Ba2 Qe1 33.Kg2 Ra2 34.Nf2 Qf2 35.Kh1 Qe1) 32...Re8 (32...Qe1 33.Nf2 Qf2 34.Kh5 Qf3 35.Kh4 Rh8) 33.Kh5 (33.Kg3 Qe1 34.Kf3 Qe3) 33...Re4! 34.de4 (34.de4 Qc3 Mate attack) 34...Qd2 (34...Qc3 35.Kg4 Rg2 36.Kf5 Qc4 37.g6 Qe6) 35.Kg4–+ Qg2 36.Kf5 Ra5 37.e5 (37.Bd5 Qh3 38.Ke5 Qe6 39.Kd4 Qb6 40.Kd3 Ra3 41.Kc2 Qf2 42.Kb1 Re3 43.Bb3 Re1 44.Bd1 Rd1) 37...Qh3 38.Ke4 Qg2 (38...Qe3 39.Kf5 Re5 40.Kg4 Qg1 41.Kh4 Qh2 42.Kg4 Re4 43.g6 Rf4 44.Kg5 Qh4) 39.Kd4 Qc6 (39...Qd2 40.Ke4 Ra4 41.Kf3 Rc4 42.f5 Qd3 43.Kg2 Rc2 44.Kg1 Qd1) 40.e6 Ra4 (40...Qc5 41.Kd3 Ra3 42.Bb3 Rb3 43.Kd2 Qe3 44.Kd1 Rb2 45.ef7 Qd2) 41.Ke3 (41.g6 Qc4 42.Ke3 Qb3 43.Kd2 Ra2 44.Ke1 Qb1) 41...Qc4 42.e7 (42.e7 Qb3 43.Kf2 Ra2 44.Ke1 Qb1; 42.Kf3 Qf1 43.Ke3 Qh3 44.Kd2 Ra2 45.Kd1 Qf1). alessandrocarvalhaes (1910) – Ayad_IRQ (1925), lichess.org, 2020.

3.Nf3 e6

4.d4 d5 5.e4 (5.e3!?–/+) 5...de4–+ 6.Bc4?? (better 6.Ne5–+) 6...ef3 7.Qf3 Nf6 8.0–0 Be7 9.Nd2 0–0 10.Ne4 Nbd7 11.Rfe1 Ne4 12.Re4 Nf6 13.Rh4 h6 14.d5 (14.Rh3 Bd6–+) 14...ed5 15.Bf6 (15.Bd3–+) 15...Bf6 (15...gf6?? 16.Qg3 Bg4 17.Qg4 Kh7 18.Bd3 f5 19.Bf5 Kh8 20.Rh6) 16.Bd3 (16.Rd1 Bh4 17.g3 Ra3–+) 16...Ba1 17.Rh6 gh6 18.Qg3 Bg7 19.h4 Qf6 20.Qc7 Qa1 21.Kh2 Qe5 (21...Be5 22.Qe5 Qe5 23.g3 Ra2 24.Kg2 b3 25.Bh7 Kh7 26.h5 Qe4 27.Kh2 Ra1 28.g4 Rh1 29.Kg3 Qg4) 22.Qe5 Be5 23.g3 d4 (better 23...Ra2!? 24.Kg2–+) 24.Kg2 Ra2 25.Kf3 Be6 26.Ke4 Bg7 27.f4 b3 (27...f5 28.Kf3 Bd5 29.Kf2 b3 30.Kg1 bc2 31.Kh2 c1Q 32.Kh3 Qh1) 28.cb3 Bb3 (28...f5 29.Kf3 Bd5 30.Be4 Be4) 29.f5 (29.Bc4 Bc4 30.Kf3 f5 31.g4 Bd5 32.Kg3 Rg2 33.Kh3 fg4) 29...Rd2 (29...Re8 30.Kf3 Bd1 31.Be2 Rae2 32.Kg4 Rh2 33.Kf4 Rf2) 30.Bb5–+ b6 31.g4 Rd8 32.g5 hg5 33.hg5 d3 34.f6 Bf6! 35.gf6 (35.gf6 Re2 Combination) 35...Kh7 36.Ke5 Kg6 37.Kf4 Rf2 38.Ke3 (38.Ke4 d2 39.Be2 Re2 40.Kf4 Rd4 41.Kg3 d1Q 42.Kh3 Qd3) 38...d2 39.Be2 (39.Kf2 d1Q 40.Ba6 Rd2 41.Ke3 Qe1 42.Be2 Re2 43.Kf4 Qf2 44.Kg4 Be6) 39...Re2! 40.Ke2 (40.Ke2 d1Q Mate attack) 40...d1Q 41.Kf2 Rd2 42.Ke3 Qe2 (42...Kg5 43.Ke4 Qe2) 43.Kf4 Rd4 44.Kg3 Qe3 (44...Rg4 45.Kh3 Qg2) 45.Kg2 Rd2 46.Kf1 Qf2 (46...Bc4) 0–1. alessandrocarvalhaes (1805) – DrMusician (1930), lichess.org, 2020.

4.e4 d6 5.Bc4 Nf6 6.d3 (6.Qe2 Nc6–/+) 6...Be7 7.Nbd2 b6 8.0–0 Nbd7 (8...d5 9.Bb3–/+) 9.Re1 Bb7 10.Ng5 (10.a3 ba3 11.Ra3 Ra3 12.Ba3 0–0–/+) 10...d5 11.ed5 ed5 (worse 11...Bd5 12.Bd5 ed5 13.Qe2=+) 12.Bb3 0–0 13.Qf3 h6 14.Nh3 Re8 15.Nf4 c6 16.Nh5 Nh5 17.Qh5 Nf6 18.Qf3 Qd6 19.Nf1 (19.Re3 c5–/+) 19...Bf8 (19...Qd7 20.Ne3 c5 21.Nf5–/+) 20.Ng3–/+ Nd7 21.Nf5 Qg6 22.h3 Nf6 23.g4 (23.Qf4–/+) 23...Qh7 (23...Nh7 24.Qg3 Ng5 25.Rab1–+) 24.Nh4 (better 24.Qg3!?=+) 24...Nd7–/+ 25.Nf5 Qg6 26.h4 1–0. alessandrocarvalhaes (1880) – cometomecometohere (1730), lichess.org, 2020.

3.Nf3 Nf6

4.d4 e5 5.de5= Ne4 6.Nbd2 (6.e3 Nc6=) 6...d5 (better 6...Nc3!? 7.Bc3 bc3=+) 7.Ne4+= de4 8.Qd8 Kd8 9.Nd4 (better 9.Ng5!? Be6 10.Ne6 fe6 11.e3+=) 9...Nc6 10.Nc6 bc6 11.e3 Be6 12.Be2 Bc5 (worse 12...Ba2 13.Bc4 Bc4 14.Ra8 Kd7 15.Bd4+–; 12...Ra2?! 13.Ra2 Ba2 14.0–0–/+) 13.0–0 Ke7 (13...Ba2? 14.Bc4 Ke7 15.Ba2+–) 14.Rad1 (14.c3 Ba2 15.cb4 Bb4–/+) 14...Rhd8 (14...Ra2 15.Rb1–+) 15.Rfe1 (15.Rd8 Rd8 16.Rd1 Ra8–/+) 15...Ra2 16.Bd4? (better 16.Rd8 Kd8 17.Rd1 Ke7 18.Rb1–+) 16...Rc2 17.Bc5 Rc5 18.Rc1 (18.Rd4 Rd4 19.ed4 Rd5–+) 18...Re5 (better 18...Rc1!? 19.Rc1 b3 20.Rb1–+) 19.Rc6 b3 20.Rc7 Rd7 21.Rd7 Kd7 22.Rb1 Kd6 23.Bd1 (23.Kf1 Kc5–+) 23...Rb5 24.Be2 (24.Rb2 Ra5 25.Kf1 Ra1 26.Rd2 Kc5–+) 24...Rb4 25.f3 f5 (better 25...b2 26.fe4 Ba2 27.Rd1 Ke5 28.Bd3–+) 26.f4 (26.Rb2 Ra4 27.Rb1 Kc5–+) 26...Kc5 (26...b2 27.g4–+) 27.h3 (27.Rb2 Ra4 28.Rb1 Ra2–+) 27...Bc4 (better 27...b2 28.g4–+) 28.g4 (28.Bd1 b2 29.Bc2–+) 28...Be2 29.Kf2 Bf3 (29...Bc4 30.Kg3–+) 30.Kg3 (30.gf5 Kc4 31.Kg3 b2–+) 30...g6 31.g5 (31.Rc1 Kd5 32.Rb1 fg4 33.hg4 b2–+) 31...Kc4 32.Rb2 Kc3 33.Rb1 Kc2 Black intends b2 34.Re1 b2 35.h4 Kd3 (35...Bd1 36.Rh1 b1Q 37.Re1 Qc1 38.h5 Qd2 39.Rg1 Qe3 40.Kh2 Qf4 41.Kh3 Rb3 42.Kg2 Qf3 43.Kh2 Qh3) 36.Rb1 Kc2 37.Re1 b1Q 38.Rb1 Rb1 39.h5 Rg1 (39...Kd3 40.Kf2 Rb2 41.Kg3 Ke3 42.h6 Rg2 43.Kh4 Kf2 44.Kh3 Bg4 45.Kh4 Rh2) 40.Kf2 (40.Kh2 Rg2 41.Kh3 gh5 42.g6 hg6 43.Kh4 Kd2 44.Kh3 Ke3 45.Kh4 Kf4 46.Kh3 Rg1 47.Kh2 Rh1) 40...Rg2 41.Kf1 (41.Ke1 Kd3 42.Kf1 Ke3 43.h6 Rh2 44.Ke1 Rh1) 41...Kd2 42.h6 (42.hg6 Ke3 43.gh7 Rh2 44.h8Q Rh8 45.Ke1 Rh1) 42...Ke3 43.Ke1 Rg1 0–1. alessandrocarvalhaes (1865) – windhover (1890), lichess.org, 2020.

4.d4 e6 5.d5 Nd5–+ 6.e4 Nf6 7.Bc4 (7.Bd3 d6–+) 7...c6 (better 7...Ne4!? 8.0–0 d5–+) 8.e5–/+ Nd5 9.Nbd2 g6 (better 9...d6!?–+) 10.Ne4=+ Bg7 (10...Qa5!?=+) 11.Nd6+= Kf8 12.0–0 b5 13.Bb3 Na6 14.Re1 Kg8 15.Qe2 (15.Bd5 ed5 16.Qd4 Qe7=) 15...Nac7=+ 16.Nd4 (16.a3 ba3 17.Ra3 Ra3 18.Ba3 b4=+) 16...Ne8 17.Nf7?? (better 17.Bd5 ed5 18.Qf3=+) 17...Kf7–+ 18.Qf3 Kg8 19.Ne2 (19.Nb5 Ba6 20.c4 Nb6–+ (20...cb5 21.cd5 Nc7 22.de6 de6 23.Red1+–)) 19...Qe7 20.Ng3 Qf7 21.Qe4 h5 (21...c5 22.Bd5 ed5 23.Qd3–+) 22.f4 (22.Bd5 ed5 23.Qb4 h4–+) 22...Kh7 (22...Nd6 23.Qf3–+) 23.Ne2 (23.Nh5 Nd6! 24.Qd3 Nc4–+) 23...Rf8 (23...c5 24.Bd5 ed5 25.Qd3–+) 24.g3 (24.Bd5 ed5 25.Qb4 d6–+) 24...Qf5 (24...c5 25.Bd5 ed5 26.Qd3–+) 25.Qd4 Bb7 26.Qc5 (26.Bd5 ed5 27.Qb4 Qc2–+) 26...Rb8 (better 26...d6 27.Qf2 c5 28.Bd5 Bd5 29.Nc1–+) 27.Rad1 Kh8 28.c4 bc4 29.Bc4 h4! 30.g4 (30.gh4 Qg4 Double attack (30...Nf4 Deflection)) 30...Qg4 31.Kh1 (31.Kf2 Nf4 32.Ke3 Bh6 33.Qf8 Bf8 34.Nf4 Bh6–+) 31...h3 (31...Qf3 32.Kg1 Ne3 33.Bd5 cd5 34.Qe3 Qe3 35.Kf1 Qf3 36.Kg1 d4 37.Nd4 Qg2) 32.Rg1 (32.Qf2 Nf4 33.Ng3 c5 34.Kg1–+) 32...Qf3 33.Rg2 Qg2 0–1. alessandrocarvalhaes (1915) – hakimilutfi93 (1940), lichess.org, 2020.

4.d4 e6 5.e3 b6 6.Bd3 Bb7 7.0–0 Bd6 8.Nbd2 0–0 9.h3 Nd5 10.Ne4 f5 (10...Be7!?–/+) 11.Nd6=+ cd6 12.Qd2 Nc3 13.Bc3 bc3 14.Qc3 Bf3 15.gf3 Qg5 16.Kh1 Qh5 17.Kh2 (17.Kg2 Nc6=+) 17...Rf6 (17...Qf3 18.Qd2–/+) 18.Rg1 (18.Qc8!? Kf7 19.Rg1 Qf3 20.Qh8=) 18...Qf3=+ 19.Qd2 Nc6 20.Rg3 Qh5 21.c3 e5 (21...d5!?=+) 22.de5 de5 23.Bc4 Kh8 24.Qd7 f4?? (24...g6 25.Be6 Na5=) 25.ef4 (25.Qg7) 25...ef4?? (25...g6 26.Rg4 ef4 27.Qd5 Qd5 28.Bd5=+) 26.Rg4 (26.Qg7) 26...Rh6?? (better 26...g6 27.Qd5 Qd5 28.Bd5 Ra3 29.Bc6 h5=+) 27.Qg7 1–0. amirgloo (1860) – SunnyDeeUp (1900), lichess.org, 2020.

4.e4 d5 5.e5 Nfd7 6.Bd3 e6 7.0–0 g6 8.Re1 Bg7 9.Bb5 0–0 10.d4 c6 11.Bf1 b5 12.Nbd2 Nb6 13.Nb3 N6d7 14.Qd2 Qe7 15.Rec1 Na6 16.Rd1 c5 17.c3 bc3 18.Bc3 b4 19.Bb2 c4 20.Qc2 cb3 21.ab3 Bb7 22.Bc1 Rfc8 23.Qb2 Nc7 24.Bd2 Ra1 25.Qa1 Ra8 26.Qc1 Rc8 27.Qa1 Nb6 28.Qa5 Attacks the isolani on b4 28...Nba8 29.Bb4 Qd7 30.Bd6 Bf8 31.Bf8 Kf8 32.Qc5 Kg8 33.Qb4 Ba6 34.Ba6 Na6 35.Qa5 N8c7 36.b4 Qb5 37.Rb1 Rb8 38.Nd2 Qa5 39.ba5 Rb1 40.Nb1 Nb5 41.Nd2 Nd4 42.Kf1 Kf8 43.f3 Nc6 44.f4 Na5 45.Kf2 Nc4 46.Ke2 Nd2 47.Kd2 Ke7 48.g4 Kd7 49.h4 Kc6 50.Kd3 Nc5 51.Kd4 Ne4 52.h5 Nf2 53.g5 gh5 54.Ke3 Ng4 55.Kf3 Kc5 56.Kg3 d4 57.Kh4 d3 58.Kh5 d2 59.Kg4 d1Q 60.Kg3 Qh5 61.Kf2 Qg4 62.Ke3 Qf5 63.Kf3 Kd4 64.Kg3 Ke4 65.Kf2 Qf4 66.Ke2 Qe5 67.g6 Qg5 68.gf7 Qf5 69.Kd2 Qf7 70.Kc3 h5 71.Kc4 h4 72.Kc5 h3 73.Kd6 h2 74.Kc5 h1Q 75.Kd6 Qhf3 76.Kc5 Kf4 77.Kd6 Kg4 78.Ke5 Q3f5 79.Kd6 e5 80.Kc5 e4 81.Kd4 e3 82.Ke3 (82.Ke3 Qe5 Mate attack) 82...Qf3 83.Kd4 Q7f4 84.Kc5 Q3e4 85.Kb6 Qff5 86.Kc7 Qee6 87.Kd8 Qff6 88.Kc7 Qff7 89.Kb8 Qee8 0–1. alessandrocarvalhaes (2000) – TlNyDkMn (2030), lichess.org, 2021.

2.b5 a4

3.a3 d6 4.c4 Nd7 5.Nc3 Nc5 6.d4 Nb3 7.Rb1 c5 (better 7...e5 8.Nf3 ed4 9.Nd4 Nd4 10.Qd4 Nf6+=) 8.Na4?? (better 8.bc6 bc6 9.Nf3=) 8...Nc1?? (better 8...Qa5 9.Bd2 Nd2 (9...Qa4?! 10.Rb3 cd4 11.Nf3=) 10.Qd2 Qd2 11.Kd2 Ra4 12.dc5 dc5–+ (12...Rc4?! 13.c6–+; worse 12...Ra3 13.cd6 ed6 14.e4–+)) 9.Rc1–/+ Qa5 (better 9...cd4!? 10.Rb1 e5–/+) 10.Nc3= cd4 11.Qd4 Qa3 12.Rd1 Bf5 (12...Qb4 13.Rb1 Qa5 14.Rb2=+) 13.e4= Bg6 14.Bd3?? (14.Nf3 e6=) 14...Nf6?? (better 14...e5!? 15.Nb1 ed4 16.Na3 Ra3–+) 15.Nf3?? (better 15.Nge2+=) 15...e5–+ 16.Ne5 de5 17.Qe5 Be7 18.0–0 (18.Nd5 Nd5 19.cd5 Qb4 20.Kf1 0–0–+) 18...0–0 (better 18...Nd7 19.Qd4 Bf6–+) 19.Nd5 Nd5 20.Qd5 (20.cd5 Bd6 21.Qd4 Bc5–+) 20...Bf6 (20...b6 21.Be2–+) 21.Qb7–/+ Rad8 ½–½. Markzela (1810) – pablinnahuelgarcia23 (2000), lichess.org, 2020.

3.Ba3 d5 4.Nf3 Nf6 5.e3 g6 (5...Bg4 6.Be2=) 6.Nc3 (6.c4 Bg7=) 6...Bg7 7.d4 0–0 8.Rb1 Nbd7 9.Be2 Re8 10.Ne5 Ne5 11.de5 Nd7 12.f4 e6 13.0–0 Nb6 14.Bc5 Nd7 15.Bd4 c5 16.bc6 bc6 17.e4 Bf8 (17...g5 18.ed5 ed5 19.Bd3=) 18.ed5 (18.Qd2 Ba6+=) 18...ed5= 19.Bg4 Qa5 20.Kh1 Bc5 21.f5 Ne5+= 22.fg6 hg6 23.Bc8 Rac8 24.Bc5 Qc3 25.Bd4 Qa3 26.Rb7= Qa2 27.Be5+/– Re5 28.Rff7 Rce8 29.Rg7 Kh8 Threatening mate... how? 30.Qf1 Rf5 31.Qc1 Rh5 32.Qf1?? Qc2?? 33.Rg8!! Kg8 Decoy theme: g8 34.Qf7 Theme: Double Attack 34...Kh8 35.Qg7 (35.Qe8) 1–0. Mueller,Oe – Broendbo,Ivar, corr Norway (year?).

3.Ba3 Nf6 4.e3 d5 5.Nf3 g6 6.c4 Bg7 7.d4 c6 8.Nbd2 0–0 9.Bd3 Nbd7 10.cd5 cd5 11.Rc1 Nb6 12.0–0 Bg4 13.h3 Bf3 14.Qf3 Re8 15.Qg3 Nfd7 16.Qc7 Qc7 17.Rc7 Rab8 18.f4 Bf6 19.Nf3 Rec8 20.Rfc1 Rc7 21.Rc7 Kf8 22.Ne5 Be5 23.fe5 Ke8 24.Rc1 Rc8 25.Rc8 Nc8 26.Kf2 Ndb6 27.Ke2 Nc4 28.Bc4 dc4 29.Kd2 Na7 30.b6 Nb5 ½–½. de Cat (2075) – Nielsen,JM (1970), 1997.

3.Bb2 c5 4.a3 b6 5.c4+= Bb7 6.e3 e6 7.Nf3 (7.Nc3 d5+=) 7...Nf6 (7...d5 8.d4+=) 8.Be2 (8.Nc3 d5+=) 8...d5 9.0–0 Nbd7 10.d4 (10.d3 Bd6=) 10...Be7 (10...Bd6 11.cd5 Bd5 12.Nbd2=) 11.Nbd2 (11.Nc3 dc4 12.Bc4 Bf3 13.Qf3 cd4 14.ed4 0–0+=) 11...0–0= 12.cd5 ed5 (12...Nd5 13.Rc1=) 13.dc5+= bc5 14.Rc1 (14.Rb1 Qb6+=) 14...Nb6 (14...Qb6 15.Nb1=) 15.Nb1 (15.Qc2 Rc8+=) 15...Re8 (15...Bd6 16.Qc2=) 16.Ne5 (16.Bf6!? Bf6 17.Rc5+–) 16...Bd6=+ 17.Nc6 Qd7 (17...Bc6 18.bc6 c4 19.Bg4=+) 18.Nc3 Attacks the isolani on a4 (18.Bf6 gf6 19.Bd3 c4+=) 18...Bc6 (better 18...Qc7!?=+) 19.bc6+= Qc6 (19...Qe7 20.Nb5 Rec8 21.c7=) 20.Bb5 The pressure on the isolated pawn grows 20...Qb7 (20...Qc8 21.Na4 Na4 22.Bf6 (worse 22.Ba4 Re6=+) 22...Bh2 23.Kh1+=) 21.Be8 Re8 (21...Ne8 22.Nb5 Nc4 23.Nd6 Ned6 24.Ba1+=) 22.Ba1 (better 22.Na4!? Na4 23.Bf6+–) 22...Qc6= 23.Qf3 h5 (23...c4 24.Bb2=) 24.h3 (24.Rfd1+–) 24...Nc4 (better 24...Be5!?+=) 25.Nd5!+– Qd5 (25...Nd5 26.Rc4) 26.Bf6 (better 26.Qd5 Nd5 27.Rc4+–) 26...Qf3= 27.gf3 Nd2? (27...Na3 28.Rfd1 Bf8= (28...gf6? 29.Rd6 c4 30.Ra6+–)) 28.Bc3?? (better 28.Rfd1 Nf3 29.Kg2+–) 28...Nf1=+ 29.Kf1 Rb8 30.Rd1 Be7 31.Rd7 Kf8 (better 31...Rb3!? 32.Bg7 Kg7 33.Re7 Ra3–/+) 32.Ra7+= Rb3? (better 32...f6 33.Ra4 Rb3+=) 33.Ra8+– Bd8 34.Rd8 (34.Ba5 Ke7 35.Bd8 Kd7+–) 34...Ke7 35.Ba5 Ra3 36.Rc8 (36.Rd5 Rb3 37.Bd8 Ke6 38.Rc5 a3+–) 36...Ra1 37.Kg2 Rc1 38.Bb6 (better 38.Ra8+–) 38...a3?? (better 38...Kd6+–) 39.Rc5+– (39.Bc5?! Kd7 40.Ra8 Rc5 41.Ra3 Rg5 42.Kf1 Rb5+–) 39...Rb1 40.Ra5 (better 40.Re5 Kd7 41.Bd4+–) 40...Rb6+– 41.Ra3 g6 42.h4 (42.f4 Rb1+–) 42...Kf8 43.f4 Kg7 44.Kf3 (44.e4 Kf6+–) 44...Re6 (44...Rb1 45.Ra5+=) 45.Ra5 (45.e4 Rc6+–) 45...Rf6 (45...f5 46.Rd5+–) 46.Kg3 (46.Rg5 Rd6+–) 46...Re6 47.f5 Rf6 (47...Re4 48.fg6 Kg6 49.Rg5 Kh6 50.Rd5+–) 48.fg6 Rg6?? (48...Kg6 49.f4+–) 49.Kf3 (49.Rg5 Kh7 50.Rg6 Kg6+–) 49...Kf6?? (better 49...Rf6 50.Ke2 Kh6+–) 50.Rh5 (better 50.Ra6 Kg7 51.Rg6 Kg6+–) 50...Rg1 51.Kf4 Rh1 52.f3 Rh2 53.e4 Ke6 54.Rh6 f6 (54...Ke7 55.h5+–) 55.h5 (55.e5 Kd5 56.Rf6 Rh4 57.Kg5 Rh1+–) 55...Rh4 (55...Rc2 56.Rh7+–) 56.Kg3 Rh1 57.Kf4 (57.f4 Kf7+–) 57...Rh4 58.Ke3 Rh1 (58...Kf7 59.Kf2+–) 59.f4 (59.Rh7 Re1 60.Kf4 Rh1+–) 59...Rh3 60.Kf2 Ke7 (60...Kf7 61.f5+–) 61.e5 (61.Rh7 Ke6+–) 61...fe5 62.fe5 Rh4 63.Kf3 Ra4 (63...Rh1 64.Ke4+–) 64.Ke3 (64.Rb6 Ra1+–) 64...Kf7 (64...Rh4 65.Kd3+–) 65.Kd3 (65.Rf6 Ke7+–) 65...Kg7 (65...Ke7 66.Rg6+–) 66.Rf6 Ra5 (66...Ra3 67.Ke4 Ra4 68.Kf5 Ra5+–) 67.Rf3 (better 67.h6 Kh7 68.e6+–) 67...Re5= 68.h6 (68.Rg3 Kh6=) 68...Kh6 69.Rf6 Kg5 70.Rf4?? (better 70.Rf1=) 70...Kf4–+ 71.Kd4 Re4 72.Kd3 (72.Kd5–+) 72...Re5 (72...Kf3 73.Kc2 Ke2 74.Kb2 Kd3 75.Kb3 Rc4 76.Kb2 Rb4 77.Ka3 Kc3 78.Ka2 Ra4 79.Kb1 Ra5 80.Kc1 Ra1) 73.Kd2?? (73.Kd4 Rh5 74.Kd3–+) 73...Re7 74.Kd3 Re8 75.Kc3 Rd8 76.Kb3 Ke4 77.Kb4 Kd4 78.Kb5 Rc8 79.Kb6 (79.Kb4 Rb8 80.Ka5 Kc4 81.Ka6 Kc5 82.Ka7 Rb6 83.Ka8 Kc6 84.Ka7 Kc7 85.Ka8 Ra6) 79...Rc3 (79...Kd5 80.Kb5 Rb8 81.Ka5 Kc4 82.Ka6 Kc5 83.Ka7 Rb6 84.Ka8 Kc6 85.Ka7 Kc7 86.Ka8 Ra6) 80.Kb7 Kd5 (80...Kc5 81.Kc7 Rd3 82.Kb7 Rd7 83.Kc8 Kc6 84.Kb8 Rd8 85.Ka7 Rc8 86.Ka6 Ra8) 81.Kb6 Kd6 (81...Rc6 82.Kb5 Rc4 83.Kb6 Rd4 84.Kb7 Kd6 85.Kb6 Rd5 86.Kb7 Rb5 87.Ka7 Kc7 88.Ka6 Rc5 89.Ka7 Ra5) 82.Ka5 (82.Kb5 Rc5 83.Ka4 Rc4 84.Kb3 Kc5 85.Ka3 Rc3 86.Ka2 Kb4 87.Kb2 Rc4 88.Ka2 Kc3 89.Ka3 Kc2 90.Ka2 Ra4) 82…Rb3 (82...Rb3 83.Ka4 Rb8 84.Ka3 Kc5 85.Ka4 Rb7 86.Ka3 Kc4 87.Ka2 Kc3 88.Ka1 Kc2 89.Ka2 Ra7; 82...Kc5 83.Ka6 Kc6 84.Ka7 Ra3 85.Kb8 Ra4 86.Kc8 Ra8) 0–1. BeepBeepImAJeep (2760) – Jamorris94 (2650), lichess.org, 2020.

3.c4 c5 (--> 2.b5 c5 3.c4 a4).

3.c4 d6 4.Nc3 g6 5.Na4 Bg7 6.Nc3 Nf6 7.d4 0–0 8.Bg5 c6 9.e4 Qa5 10.Qd2 Re8 11.Bd3 Nbd7 12.Nf3 Nb6 13.bc6 bc6 14.Nd1 Qa4 15.Nb2 Qa3 16.0–0 c5 17.Rfb1 Bg4 18.dc5 dc5 19.Ne1 Red8 20.Nc2 Qa6 21.Qe3 Be6 22.Qc5 Rd3 23.Nb4 Qa7 24.Bf6 Rd2 25.Nc6 Qd7 26.Ne7 Kh8 27.Qe5 Qe7 28.Bg7 Kg8 29.Bh6 f6 30.Qb5 Rd6 31.c5 Bd7 32.cd6 1–0. aspasio – MileEndMaster, ICC, 1999.

3.c4 h5 4.Nc3 e6 5.e4 g6 6.Nf3 Bg7 7.d4 Ne7 8.Bd3 b6 9.0–0 Bb7 10.Na4 d6 11.Re1 Nd7 12.Be3 Nf6 13.Nc3 Ng4 14.Bg5 f6 15.Bd2 e5 16.Nd5 Nd5 17.ed5 Kf7 18.h3 f5 19.Ng5 Kg8 20.Ne6 Qh4 21.Re2 (21.hg4?! hg4 22.Kf1 Qh1 23.Ke2 Qg2+=) 21...e4 (21...f4 22.Qc2+– (22.hg4 hg4 23.f3 Qh1 24.Kf2 g3; 22.Ng7?! Kg7 23.Be1 Qg5+–)) 22.Bg5 (22...Nf2 23.Rf2+– (23.Bh4?! Nd1 24.Rd1 ed3 25.Rd3 Rc8+–); 22.hg4?? hg4 23.Bh6 Rh6 24.f3 g3 25.Ng7 Qh1#) 1–0. marre (1975) – beda (1965), GameColony.com, 2003.

3.c4 Nh6 4.Nc3 (4.d4 Ng4+=) 4...a3 (4...e6 5.Na4 d5 6.c5+=) 5.d4+/– e6 6.e4 b6 (6...Bb4 7.Nge2+=) 7.Nf3 Bb7 8.Bd3 f6 9.0–0 Nf7 10.Be3 (10.Rb1 e5+/–) 10...g6 (10...Bb4 11.Qb3 Qe7 12.Rab1+/–) 11.c5 (11.Qb3 f5+/–) 11...Bg7 (11...f5 12.Rc1+/–) 12.d5 bc5 (12...ed5 13.Nd5 Bd5 14.ed5+/–) 13.Bc5 e5 (13...ed5 14.Nd5 d6 15.Bd4+/–) 14.Qc2 (14.Na4 Bf8+/–) 14...d6 (14...Bf8 15.Be3+/–) 15.Be3 Nd7 16.Nd2 (16.Rac1 Bh6+/–) 16...g5 (16...Bh6 17.Bh6 Nh6 18.Rac1+/–) 17.Rac1+– h5 (17...f5 18.ef5 Nb6 19.Be4+–) 18.Ncb1 Nc5 (18...Rc8 19.Nc4+–) 19.Bc5 dc5 20.Qc5 Rc8 (20...Bf8 21.Qc7 Nd6 22.b6+–) 21.b6 cb6 22.Bb5 Bc6 23.Bc6 Rc6 24.Qc6 Kf8 25.Qe6 Nd6 26.Nc4 Nb7 27.Nb6 (27...Qe7 28.Rc8 Nd8 29.Rd8 Qd8 30.Nd7 Qd7 31.Qd7+–) 1–0. orane – 10yearoldgirl, Caissa.com, 2006.

3.d4 d5 4.e3 c5 (4...Bf5 5.c4=) 5.c4 (5.dc5 e6+=) 5...e6= 6.Nf3 Nf6 7.Nc3 cd4 (7...Ne4 8.Bd2=) 8.ed4 (8.Qd4 Be7+=) 8...dc4 9.Bc4 Bb4 10.Bd2 a3 (10...0–0 11.0–0= (worse is 11.Na4 Bd2 12.Nd2 Qd4–/+)) 11.0–0+= 0–0 12.Qb3 Bd6 13.Nb1 (13.Rad1 b6+=) 13...Qe7 (13...b6 14.Rc1=) 14.Nc3 (14.Re1 Nbd7+=) 14...Nbd7 (14...Qd8 15.Rad1+=) 15.b6 Qd8 16.Rab1 Re8 17.Rfc1 Nf8 18.Qc2 (18.Nb5 Qb6 19.Nd6 Qd6+=) 18...Bd7 (18...N8d7 19.Na4=) 19.Nb5 (19.Bg5 Rc8 20.Qe2 Be7+=) 19...Bc6 20.Nd6 Qd6 21.Bb4 Qd8 ½–½. Woschkat,Karl_Heinz – Roever,L, corr SOK–87–10, 1987.

3.e3 Ra5 4.d4 b6 (4...Nf6 5.Bd2 Ra8 6.Bd3=) 5.Ba3 (5...Bb7 6.Bb4+=; 5.Bd3 Bb7 6.Nf3 Nf6+=). Netsurferdude – Ruthless Rook, ChessWorld.net, 2005.

3.e3 d6 4.c4 e5 5.Nc3 Nf6 6.Nf3 Bg4 (6...Bf5 7.Be2+=) 7.Be2 (worse 7.Na4 e4 8.h3 Bh5–/+) 7...a3 (7...Nbd7 8.Qc2+= (8.Na4?! e4 9.Nd4 Be2 10.Ne2 Ne5=)) 8.0–0 (8.Qb3+–) 8...d5 (8...Nbd7!?+–) 9.Ne5 Be2 10.Qe2 d4?? (better 10...Nbd7 11.Nf3 dc4 12.Qc4 Nb6+–) 11.ed4 Be7 12.Qf3 c6 13.bc6 Nc6 14.Nc6 bc6 15.Qc6 Nd7 (15...Kf8 16.Rb1 g6 17.d3+–) 16.Nd5 (16.Rb1 0–0+–) 16...0–0 17.Re1 Re8 (17...Bf6 18.Qd6 Re8 19.Nf6 Qf6 20.Ba3 Qf5+–) 18.Re7 Re7 (18...Kh8 19.g3 (19.Qd7 Qd7 20.Ba3 Qa4–/+) 19...Re7 20.Ne7+–) 19.Ne7 Qe7 (19...Kh8 20.Rb1 Nf8+–) 20.Qa8 Nf8 21.Ba3 Qa3 22.Qa3 h5 23.c5 (23.c5+–) 1–0. DEFFM – GuestPNGM, freechess.org, 2019.

3.e4 c6 (--> 1.b4 a5 2.b5 c6 3.e4 a4).

3.e4 e5 4.Nf3 Bc5 5.Bc4 (< 5.Ne5 Bd4 6.Nf7 Qf6–/+) 5...d6 6.0–0 Nf6 7.d3 Bg4 8.h3 Bh5 9.Qe2 c6 10.g4 Bg6 11.g5 (11.Nc3 0–0=) 11...Nfd7=+ 12.c3 Bh5 13.bc6 Nc6 14.Kg2 h6 15.gh6 Qf6 16.Be3 gh6 (16...Be3 17.Qe3 Nb6 18.Bb5=+) 17.Nbd2=+ 0–0–0 (17...Be3 18.fe3 Rg8 19.Kf2=) 18.Rab1= Rhg8 19.Kh2 Rg6 20.Kh1 (20.Rg1 Rdg8=) 20...Rdg8 21.Bd5 Bf3 (21...b6!?=) 22.Nf3+= Be3 23.fe3 Nc5 24.Nh2 Qh4 25.Rf7 Rg2? (better is 25...Nd8 26.Rf3 Rg2 27.Qg2 Rg2 28.Kg2 Nd3+=) 26.Qg2+– Rg2 27.Kg2 Nd3?? (better is 27...Qg5 28.Ng4 Ne7+/–) 28.Rbb7+– Qg5 (28...Ne1 29.Kf1 Qh3 30.Ke1 Qe3 31.Kf1 Qh3 32.Kg1 Qg3 33.Kh1 Qe1 34.Nf1 Qf1 35.Rf1 Kb7+–) 29.Ng4 Ne1 (29...Nc5 30.Rbc7 Kd8 31.Bc6+–) 30.Kf1 (30...Qe7 31.Bc6 Qf7 32.Rf7+– (32.Ke1?! Qa2 33.Nh6 Qc4+/–)) 1–0. kamret (2180) – wendol (2010), GameColony.com, 2003.

3.e4 e6 4.Nf3 Nf6 5.e5 Ng8 6.d4 d6 7.Bd3 Nd7 8.0–0 de5 9.de5 (9.Ne5?! Ne5 10.de5 Qd4=) 9...Nc5 10.Bc4 Qd1 11.Rd1 Ne7 12.Nc3 Ng6 13.Be3 h6 (13...b6 14.Bd3+=) 14.Rd2 Be7 15.Rad1 0–0 16.h4 Re8 17.Kh2 b6 18.h5 Nf8 19.Bc5 Bc5 20.Bd3 Bb4 21.Be4 Bc3 22.Rd3 Ra7 23.Rc3 Bd7 24.Nd4 Rc8 25.Rcd3 Ra5 26.c4 a3 (26...Be8 27.g4+–) 27.Nb3 Ra4 28.Rd7 Nd7 29.Rd7 Rc4 30.Nd4 Rb4 31.Nc6 Re4 32.f3 Re2 33.Ne7 Kh7 34.Nc8 Ra2? (better is 34...Re5 35.Rc7 Rh5 36.Kg1 Rb5+/–) 35.Rc7+– (35.Rf7?! Rg2 36.Kg2 a2 37.Nb6 a1Q=) 35...Re2 36.f4 (36.Nb6?! Re5 37.Ra7 Rh5 38.Kg3 Rb5+/–) 36...Re4 37.Rf7 (better is 37.Nb6 Rf4 38.Nd7+–) 37...Ra4+/– 38.Nb6 a2 39.Na4 a1Q 40.Nc5 Kg8 (better is 40...Qe1!?=) 41.Rc7 Qc1?? (better is 41...Qe1 42.Rc8 Kf7+/–) 42.Ne6+– Qe3 (42...Qe1 43.Rg7 Kh8 44.Rg3+–) 43.Rg7 Kh8 44.Rg6 Qf2 45.Rh6 Kg8 46.Kh3 Qb2 47.Rg6 Kh8 48.g4 Qb5 49.Kh4 Qb4 50.Kg5 Qe7 51.Rf6 Kh7 52.Nf8 Kg8 53.Ng6 Qd8 54.Kh6 Qe8 55.e6 Qb8 (55...Qd8 56.e7 Qe7 57.Ne7 Kh8 58.Rf8#) 56.e7 Qf4 57.Nf4 (57.Rf4=) 1–0. b4_player (2240) – Raspoutine (2245), GameColony.com, 2003.

3.e4 Nf6 4.e5 Nd5 =.

3.e4 g5 4.Bb2 f6?? (better is 4...Nf6+/–) 5.Qh5# 1–0. pcmvr – michas, internet, 2005.

3.Nf3 Ra5 4.e3 (4.e4 Nf6 5.e5 Ne4+=) 4...Rb5?? (better 4...Nf6+=) 5.Bb5+–. GuestZMZH – GuestWKPB, freechess.org, 2018.

3.Nf3 Nf6 4.c4 d5 5.cd5 Nd5 6.e4 Nf6 7.e5 Ng4 (7...Nd5 8.Bc4+=) 8.Bc4 (8.d4 c6+–) 8...e6 9.0–0 (better 9.d4 Nd7 10.0–0+–) 9...Bc5? (better 9...Ne5 10.Ne5 Qd4+–) 10.d4+– Be7 11.h3 Nh6 12.Bh6 gh6 13.Qc2 Nd7 14.Bd3 Nb6 15.Nc3 Bb4 (15...Bd7 16.Rac1+–) 16.Ne4 (16.Rab1 Bc3 17.Qc3 Nd5+–) 16...Nd5 17.Nc5 (17.Bc4 Be7+–) 17...Bc5 18.Qc5 b6 19.Qc1 Qd7 20.Qh6 Bb7 21.Rfc1 Nb4 22.Qf6 Rf8 23.Bh7 Bf3?! (23...Nd5 24.Qg5 Qb5+–) 24.Qf3 (24.gf3?! Ra5+–) 24...Nd5 25.Be4 0–0–0 26.Rc6 Rg8 (26...f5 27.ef6! Rf6+–) 27.Rac1 Kb8 28.Qa3 f5 (28...Rg7 29.Qa4 Rdg8 30.g3+–) 29.ef6 Nf6 (29...Rc8 30.R1c4 Kb7 31.Qa4+–) 30.Rc7 (better 30.R1c4 Qd4 (30...Ne4 31.Ra4 Rg2 32.Kg2 Qg7 33.Kh2 Qg1 34.Kg1 Kb7 35.Ra7 Kc8 36.Rcc7 Kb8 37.Rab7) 31.Rd4 Rd4+–) 30...Qc7 31.Rc7 Kc7 32.Qe7 Nd7 33.Qe6 Rde8 (33...Rc8+–) 34.Qc6 Kd8 35.Bf5 Rg7 36.d5 Ne5 37.Qf6 (37.Qf6 Ree7 38.d6+–) 1–0. guest669 – guest96, chessclub.com, 2019.

3.g3 c6 4.e4 e5 5.Nf3 d6 6.a3 Nf6 7.Nc3 Nbd7 8.d4 ed4 9.Qd4 Be7 10.Bd3 Qc7 11.0–0 Nc5 12.Bc4 Qd7 13.Be3 h6 14.e5 Nh7 15.Bh6 de5 16.Qd7 Bd7 17.Bg7 Rg8 18.Be5 Bg4 19.Nd4 Ng5 20.f3 (20.f4 Nd7 21.Rfe1 cb5 22.fg5 Ne5 23.Bb5 Kf8 24.Re5 Rg5+–) 20...Bh3 21.Rfe1 Rd8 22.Kf2 Rg6 23.Rad1 Kf8 24.g4 Ra8?! (24...Nd7 25.Bc7 Rc8 26.Re7 Ke7 27.Nf5 Ke8 28.Re1 Kf8 29.Bd6 Rd6 30.Nd6+–) 25.Kg3 Rh6 (25...cb5 26.Ncb5 Rc8+–) 26.Nf5 Rh7 (26...Rf6 27.f4 Rf5 28.gf5 Bf5 29.fg5+–) 27.Ne7 cb5 ½–½. Steinhaus – Peter, SFM, 1998.

3.a3 Ra5

4.c4 c6 5.Nc3 cb5 6.cb5 Qb6 7.e3 d6 8.Na4 (8.d4 Qd8+–) 8...Qa7 (8...Qd8 9.d4+–) 9.Nc3 (9.b6 Qa8 10.Nc3 Nf6+–) 9...e6 (9...Nf6 10.Nf3+–) 10.Nf3 Nf6 11.Be2 (11.Bb2 d5+–) 11...Be7 (11...d5 12.Bb2+–) 12.0–0 e5 (12...0–0 13.Nd4 Qb6 14.Nb3+–) 13.a4 (13.d4 Nbd7+–) 13...Nbd7 14.Bb2 (14.Ba3 Qb6+–) 14...Nc5 (14...Qa8 15.d4+–) 15.d4+– Nce4 (better 15...ed4 16.ed4 Ncd7+–) 16.Ne4 Ne4 17.de5 de5 18.Ne5 0–0 (18...Be6 19.Bd3 Nc5 20.Bc3+–) 19.Bf3 (19.Nc4 Be6 20.Na5 Qa5+–) 19...Nf6? (19...Nc5+–) 20.Bd4 (better 20.Nc4+–) 20...b6 (20...Qb8 21.Nc4 Ra8+–) 21.Nc6 Qa8 (21...Qc7 22.Be5 Qd7 23.Qd7 Bd7 (23...Nd7?? 24.Ne7 Kh8 25.Bd6+–) 24.Ne7 Kh8+–) 22.Ne7 Kh8 23.Ba8 Ra8 24.Bb6 (24.Bf6 Be6 25.Qd4 Rg8 26.Ng8 h6 27.Bg7 Kg8 28.Qf6 Ra4 29.Ra4 Bd5 30.Bh6 Bg2 31.Qg7) 24...Bb7 25.a5 Rfe8 26.Nf5 Re4 27.a6 Bd5 28.Bd4 Rg4 29.f3 (29.Bf6 Rg2 30.Kh1 Be4+–) 29...Rg6 30.Qd2 (better 30.Bf6 Be6 31.Bg7 Rg7 32.Ng7 Kg7 33.Qd4 f6+–) 30...Bc4 31.Qb2 Bf1 32.Kf1 Rc8 33.Ng7! Kg7 (33...Rg7 34.Bf6 Deflection (34.Bf6 Remove defender; 34.Bf6 Overloading); 33...Kg7 34.b6 Passed pawn) 34.Bf6 Rf6 35.Rd1 (better 35.a7!? Kg6 36.b6 Rd6+–) 35...Kg6 36.Qd4 (better 36.b6 Rb8 37.a7 Rbb6 38.Qc2 Kg7+–) 36...Re8 37.Qg4 (37.a7 Rf5+–) 37...Kh6 38.Rd5 Rf3 39.gf3 f5 (39...Re5 40.Re5 f5 41.Re6) 40.Rf5 Re3 41.Rh5 (41.Qg5) 1–0. DEFFM – GuestDCVL, freechess.org, 2016.

4.e3 d6 5.Bb2 (5.d4 Nf6+=) 5...Bd7 (5...Nf6 6.Nf3=) 6.c4+= e5 7.Nc3 Ra7 (7...c6 8.bc6 Nc6 9.Na4+=) 8.Nf3 Bg4 9.Be2 Bf3 (9...Nf6 10.0–0+/–) 10.Bf3 Qe7 (10...Nf6 11.Na4 e4 12.Be2+/–) 11.0–0 Nd7 12.Na4 g6 (12...Qh4 13.d3+–) 13.Nc3 (13.b6 Nb6 14.Nb6 cb6+–) 13...Ngf6 14.Nd5 (14.d4 e4 15.Be2 Bg7+–) 14...Nd5+/– 15.Bd5 h5 (15...Nb6 16.d4+/–) 16.f4 Bg7? (better is 16...Nf6+–) 17.fe5 Be5 18.Be5 Ne5 19.d4 Ng4 20.Bf7 Qf7?? 21.Rf7 Kf7 22.Qf3 Kg7 23.h3 Nh6 24.a4 Nf5 25.a5 Rf8 26.Qe2 b6 27.a6 Raa8 28.Rf1 Rae8?? Attacks the backward pawn on e3 29.Kh2 Re3 30.Qb2 Rfe8 31.d5 Kh6 32.Qd2 h4 33.a7 Kh5 34.Rf5! gf5 35.a8Q! Ra8 36.Qe3 Rg8 37.Qe7 Rg6 38.Qc7 f4 39.Qb6 f3 40.gf3 Rg3 41.Qd6 Rf3 42.Qe5 Kg6 43.Qe4 Rf5 44.Qf5! Kf5 45.b6 (45.b6 Ke5 46.b7 Kf6 47.b8Q Kf5 48.d6 Ke5 49.d7 Kd4 50.d8Q Kc3 51.Qb1 Kc4 52.Qdd3 Kc5 53.Qbb5) 1–0. Fournier,Frederic – franek10000, Active (5/0), 2005.

4.e3 Nf6 5.Nf3 =.

4.e4 c6 5.bc6 dc6 6.Nf3 f6 7.Be2 e5 8.0–0 Nd7 9.d3 b6 10.Nfd2 f5 (better is 10...Ra7!?=) 11.ef5+/– Nh6 12.Ne4 Nf5 13.Bg4 (13.Bh5!? Ke7 14.Bd2+/–) 13...Nc5 14.Nc5 Bc5 15.Bf5 Bf5 16.Bb2 0–0 17.Be5 Qg5 18.Nd2 Bh3 (better is 18...Bg4!? 19.Qe1 Re8=+) 19.Bg3= Bf2?? (better is 19...Bg4 20.Qc1 Qh5+=) 20.Rf2+– Raf5 21.Rf5 Bf5 22.Nf3 Qe3 23.Bf2 Qf4 24.Qf1 Bg4 25.Bg3 Qe3 26.Bf2 Qf4 27.Ne1 Qg5 28.g3 Rf6 29.Ng2 Rh6?? 30.Be3 Qh5 31.Bh6 Qh6 32.Re1 g6 33.Re8 Kg7 34.Qf8 1–0. valpa – dc, playchess.de, 2003.

4.e4 e5 5.c4 c6 (5...Bc5 6.Nf3=) 6.Bb2 f6? (6...d6 7.Bc3 Ra8 8.d4+=) 7.Bc3 (7.Be5!? d6 8.Bc3+–) 7...Ra8+= 8.d3 (8.d4 d6+=) 8...d5 (8...cb5 9.cb5 d5=) 9.Nd2 (9.ed5 cd5 10.d4 ed4 11.Bd4 Qe7 12.Be3 dc4 13.Bc4 Nh6+=) 9...de4 (9...d4 10.Bb2=+) 10.Ne4 (10.de4 Bc5=) 10...Bf5 11.Qh5 Bg6 12.Qf3 Nd7 (12...cb5 13.cb5 Qd5 14.Nd2=+) 13.Be2 (13.bc6 bc6 14.Be2=) 13...Nc5 The backward pawn on d3 becomes a target (13...cb5 14.cb5 Rc8 15.Bd2–/+) 14.Nh3 (14.bc6 Be4 15.de4 bc6+=) 14...Ne4 (better 14...Nb3!? 15.Ra2 cb5–/+) 15.de4+= Bc5 16.0–0 Ne7 17.Rfd1 Qc7 18.Qg3 (18.Bd2 f5 19.ef5 Nf5=) 18...0–0 (better 18...Nc8=) 19.Kh1 (better 19.Qf3=) 19...Be4–/+ 20.Bh5 (20.Bf3 Nf5 21.Qg4 Bf3 22.Qf3 Nd6–+) 20...Bf5 21.Bd2 Bh3 (21...Be6 22.Be2–+) 22.gh3? (22.Qh3!? Rad8 23.Be3 cb5 24.cb5 Rd1 25.Rd1 Be3 26.Qe3–/+) 22...g6 (22...Nf5 23.Qg2–+) 23.Rg1 (23.Bg4–+) 23...Qb6 24.Bh6 (24.Rg2 Rad8 25.f4 cb5 26.cb5 Qb5 27.fe5 Rd3–+) 24...Bf2 25.Qg4 (25.Qg2 Bg1 26.Bf8 Rf8 27.Qg1 Qg1 28.Rg1 cb5 29.cb5–+) 25...Rfd8 (25...Bg1 26.Bf8 Kf8 (worse 26...Rf8 27.Qe6 Kh8 28.Rg1–+) 27.Rg1 cb5–+ (27...gh5?! 28.Qg7 Ke8 29.Qf6=)) 26.Qe6 Kh8 27.Bg7 (27.Qf6 Kg8 28.Qg7) 27...Kg7–+ 28.Rg6?? (better 28.Qe7 Kh6 29.Qf6 cb5 30.Qg5 Kg7 31.Qe5 Kg8 32.Bf3 Bg1 33.Bd5 Rd5 34.Qd5 Kg7 35.Rg1–+) 28...hg6 (better 28...Ng6 29.Qf5–+) 29.Bg6 (29.Qe7 Kh6 30.Rf1 Kh5 31.Qh7 Kg5 32.h4 Kf5 33.h5–+) 29...Ng6 30.Ra2 Qe3 (30...Rd1 31.Kg2 Nh4) 31.h4 (31.Qe7 Ne7 32.Kg2 Rd1 33.Rf2 Nf5 34.Rf1 Nh4 35.Kh1 Rf1) 31…Qf3 0–1. Agiant – AndreyGer, lichess.org, 2020.

3.a3 b6

4.Bb2 Ra5 5.c4+= c6 6.Bc3 (6...Ra8 7.Nf3=). shirehorse – Ruthless Rook, ChessWorld.net, 2005.

4.Bb2 Bb7 5.e3 e6 6.Nf3 d5 7.c4 Nf6 8.Be2 dc4 9.Bc4 Nbd7 10.0–0 (10.Nc3 Bd6+=) 10...Be7 (10...Bd6 11.Nc3=) 11.d4 0–0 12.Nbd2 c5 13.dc5 Bc5 14.Qe2 Ne4 (14...Qe7 15.Rfd1=) 15.Ne4+= Be4 16.Rfd1 Qc7? (16...Qe7 17.Bd3 Bd5 18.Rd2=) 17.Bd4?? (better is 17.Ng5 Bf5 18.e4+–) 17...Rfc8 (better is 17...Bd6 18.Ng5 Bf5=) 18.Rac1?? (18.Ng5 Be7 19.Be6 Bg5+/–) 18...Qb7?? 19.Bc5 Nc5 20.Rc3 Nb3 21.Qb2 Bf3+= 22.gf3 Qf3 23.Be2 Qh3 24.Rc8 Rc8 25.Bc4?? Qg4–+ (25...Qg4 26.Kh1 Qd1 27.Kg2 Qg4 28.Kf1 Rc4 29.h3 Qh3 30.Ke2 Qg4 31.Kd3 Nc1 32.Qc1 Rc1 33.e4 Qf3 34.Kd2 Qc3 35.Ke2 Re1) 0–1. Fournier,Frederic (1715) – tothpetertamas (1670), Active (5/0), 2005.

4.Bb2 Nf6 5.c4 =.

4.c4 Nf6 5.Bb2 e6 6.Nc3 c6 (6...Bb7 7.Na4 Be7 8.Nf3=) 7.Na4 cb5 8.cb5 Bb7 (8...d5 9.Nf3+=) 9.e3 (9.Bd4 Ne4+–) 9...Be7 (9...d5 10.Nf3+=) 10.Nc3 (better 10.Bd4 Nd5 11.Bg7+–) 10...0–0 11.Nf3 d5 12.Be2 Nbd7 13.0–0 Nc5 (13...Ne4 14.a4+–) 14.d4+– Nce4 15.Ne4 de4 16.Ne5 Nd5 (16...Bd6 17.Qb1+–) 17.a4 f6 (17...Bd6 18.Qb1+–) 18.Nc4 (18.Nc6 Bc6 19.bc6 Qc7+–) 18...Re8 (18...f5 19.f3+–) 19.Qb3 Bf8 (19...f5 20.Ba3+–) 20.Rfc1+– Kh8 21.Nd2 (21.Ba3 Qd7+–) 21...f5+– 22.Nc4 Nf6 23.Ne5 Bd5 24.Bc4 Bd6?? (better 24...Kg8+–) 25.Nf7 (25.Nf7 Kg8 26.Nd8 Red8 27.Ba3+–) 1–0. BeepBeepImAJeep (2670) – SupWitches (2435), lichess.org, 2019.

4.e3 h6 5.Nf3+= g5 (5...Bb7 6.Be2+=) 6.Bb2+– Nf6 7.c4 Ne4?? (better 7...Bg7+=) 8.Bh8+– d6 9.h3 Be6 (9...e5 10.Be2+–) 10.d3 Nf6 11.g4 d5 (11...c5 12.Nc3+–) 12.Bg2 (12.Nd4 Qd7+–) 12...dc4 13.Ne5 (13.Ng5 Bd5 14.Ne4 cd3 15.Bf6 ef6 16.Qd3 c6+–) 13...Nbd7 (13...Bd5 14.e4 Bb7 15.Nc4+–) 14.Bc6 Ra5 (14...h5 15.dc4 hg4 16.Ra2+–) 15.Bd7 (better 15.d4 Qc8+–) 15...Nd7 16.dc4 (better 16.Nc6!? Qa8 17.0–0 Rb5+–) 16...Ne5 17.Be5 Qd1 18.Kd1 Bc4 19.Bc7 (19.Nd2 Bd3 20.Rc1 Rb5+–) 19...Rb5 20.Nc3 Bb3 (20...Rb2 21.Kc1 Rf2+–) 21.Ke2 (better 21.Kd2 Rc5 22.Bb6+–) 21...Rc5 22.Ne4 (better 22.Na4 Rc2 23.Kd3 Ba4 24.Bb6 Rf2 25.e4 Bc2 26.Ke3+–) 22...Rc7= 23.Rhb1 (better 23.Rhc1 Bc4 24.Ke1=) 23...Bc4 24.Kf3 Bg7 25.Nc5?? (better 25.Nd2 Ba1 26.Nc4 Rc4 27.Ra1–/+) 25...Rc5–+ (worse 25...bc5 26.Rb8 Kd7 27.Rd1 Kc6 28.Rdb1–+; worse 25...Ba1 26.Na4 b5 27.Ra1 ba4 28.h4–+) 26.Rb6 (26.Rd1 Bb3 27.Re1–+) 26...Ba1 27.Rb8 Kd7 28.Rb7 Kc6 29.Re7 Bd5 30.e4 Rc3 31.Kg2 Ra3 (better 31...Kd6 32.Re8 Kd7–+) 32.ed5 Kd5 33.Rf7 Ra2 34.Rh7 (34.h4 Bd4 35.hg5 hg5–+) 34...Re2 (better 34...Bd4!? 35.Kg3–+) 35.Rh6 a3 36.Ra6 a2 37.Ra5 (37.Kf3 Rc2 38.Ra5 Kc4–+) 37...Kc4 (better 37...Ke4–+) 38.Rg5 (38.Kf3 Bc3 39.Ra8 Rc2–+) 38...Bb2 (better 38...Be5 39.Kf3 Re1 40.Re5 Re5–+) 39.Ra5 a1Q 40.Ra1 Ba1 41.Kg3 Be5 42.Kf3 Re1 43.h4 Rf1 (43...Kd4 44.h5–+) 44.Kg2 Rd1 45.h5 (45.Kf3 Kd4–+) 45...Rd8 (45...Kd5 46.Kf3–+) 46.Kh3 (46.Kf3 Kd5 47.g5 Ke6–+) 46...Rf8 47.Kg2 (47.g5 Rf2 48.Kg4 Rf4 49.Kh3 Kd5–+) 47...Bd4 (better 47...Kd3 48.f4 Rf4 49.Kg3–+) 48.f3 (48.g5 Rf2 49.Kh3 Kd5 50.g6 Ke4 51.Kg3 Rf3 52.Kh2 Rf1 53.Kg2 Rg1 54.Kh3 Kf3 55.Kh2 Rg5 56.h6 Rh5) 48...Kd5 (better 48...Kd3 49.Kg3–+) 49.Kg3 Ke5 50.f4 Rf4 51.h6 Ke4 52.g5 (52.Kh4–+) 52...Rf3 53.Kg4 (53.Kg2 Rf2 54.Kg3 Ra2 55.g6 Be5 56.Kg4 Rg2 57.Kh3 Kf3 58.Kh4 Bf4 59.Kh5 Rh2) 53...Rf4 (53...Bf2 54.h7 Rg3 55.Kh5 Kf5 56.Kh6 Bd4 57.h8Q Rh3) 54.Kh5?? (54.Kg3 Rf1 55.h7 Rg1 56.Kh2 Rg5 57.h8Q Bh8 58.Kh3 Kf3 59.Kh4 Bf6 60.Kh3 Rh5) 54...Rf5 (54...Kf5 55.h7 Rf3 56.Kh4 Bf2 57.Kh5 Rh3) 55.Kg6–+ Kf4 56.h7 Rg5 57.Kh6 (57.Kf7–+) 57...Kf5 (57...Bg7) 58.h8B (58.h8R Bg7 59.Kh7 Kf6 60.Kg8 Bh8 61.Kh7 Bg7 62.Kg8 Re5 63.Kh7 Rh5 64.Kg8 Rh8) 58...Bh8 59.Kh7 Be5 60.Kh6 Rg7 61.Kh5 Bg3 (61...Rh7) 62.Kh6 Rg6 (62...Rd7 63.Kh5 Rh7) 63.Kh5 (63.Kh7 Bf4 64.Kh8 Be5 65.Kh7 Rg2 66.Kh6 Rh2) 63...Rg5 (63...Bf4 64.Kh4 Rh6) 64.Kh6 Bf4 (64...Be5 65.Kh7 Rh5 66.Kg8 Ke6 67.Kf8 Rh8) 65.Kh7 Kf6 (65...Ke6 66.Kh6 Rg1 67.Kh5 Kf5 68.Kh4 Rh1) 66.Kh6 Rg4 (66...Rd5 67.Kh7 Kf7 68.Kh8 Rh5) 67.Kh5 Rg1 (67...Rg2 68.Kh4 Kf5 69.Kh5 Rh2) 68.Kh4 Kg6 69.Kh3 Rg3 (69...Kf5 70.Kh4 Rh1) 70.Kh4 (70.Kh2 Kf5 71.Kh1 Ke4 72.Kh2 Rc3 73.Kg2 Rc2 74.Kh3 Kf5 75.Kh4 Rh2) 70...Kg7 (70...Kf5 71.Kh5 Rh3) 71.Kh5 Rg1 (71...Kf6 72.Kh4 Kf5 73.Kh5 Rh3) 72.Kh4 Kg6 (72...Bd6 73.Kh5 Kf6 74.Kh4 Rg3 75.Kh5 Kf5 76.Kh6 Bf4 77.Kh7 Be5 78.Kh6 Rh3) 73.Kh3= Kg5 (73...Kf5 74.Kh4 Rh1) ½–½. MARYMARY – Coach Q, ChessWorld.net, 2020.

3.a3 c6

4.c4 cb5 5.cb5 b6 6.e3 Bb7 7.Nf3 e6 8.Nc3 Be7 (8...Bf3 9.Qf3 d5 10.Qd1+=) 9.Be2 d5 (9...Ra5 10.d4+=) 10.Na4+– Nf6 11.0–0 0–0 12.Bb2 Qe8? (12...Nbd7 13.Nd4+–) 13.Nc3 (better 13.Nb6 Ra5 14.Qb3+–) 13...Bd6 14.a4 (14.d4 Qe7+–) 14...e5 (14...Qe7 15.d4+–) 15.d4 (15.Ba3 Ba3 16.Ra3 Qe7+–) 15...ed4 (15...e4 16.Nd2+–) 16.Nd4 Ne4 (16...Qe5 17.Nf3 Qe7 18.Rc1+–) 17.Ne4 de4 (17...Qe4 18.Ba3 Ba3 19.Ra3+–) 18.Qb3 (better 18.Nf5 Be5 19.Nd6 Bd6 20.Qd6+–) 18...Qe5+– 19.g3 (19.Nf3 Qh5 20.Qc3+–) 19...Nd7 20.Nc6 Qe6?? (20...Qe8 21.Rad1 Bc7 22.Qc3+–) 21.Bc4 (better 21.Qe6 fe6 22.Rfd1+–) 21...Qe8 (21...Qg6 22.Rfd1 Rae8 23.Qc2+–) 22.Bd5 (better 22.Rfd1 Bc5 23.a5+–) 22...Nc5?? (22...Kh8 23.Rfd1 Nc5 24.Qc2+–) 23.Qc2 (better 23.Qc3 Be5 24.Qe5 Qe5 25.Be5 Bc6 26.Bc6 Ra4+–) 23...Bc8?? (better 23...Qd7+–) 24.Qc3 Be5 25.Ne5 Na4 (25...Be6 26.Ba8 Qa8+–) 26.Ra4 Ra4 27.Nc6 (27.Nc4 Qe5 28.Qe5 Rc4 29.Qg7) 27...g6 (27...Rd4 28.Qd4 Qe5 29.Qe5 Rd8 30.Qg7) 28.Qg7 1–0. GuestNYSY – GuestFDTB, freechess.org, 2017.

4.c4 cb5 5.cb5 d5 6.Bb2 Nd7 7.e3 (7.Nf3 Nc5=) 7...e5 8.Nf3 e4 (8...Bd6 9.Be2=) 9.Nd4 Ngf6 10.Nc3 Nc5 11.d3 Bg4 12.f3 Bh5 (12...ef3 13.gf3 Bd7 14.Rg1=) 13.Be2 g6 (13...ed3 14.Bd3 Nd3 15.Qd3 Bg6=) 14.g4 (better is 14.0–0+=) 14...ef3+= 15.Nf3 Bg4 16.Nd5 Nd5 17.Bh8 Nb3 (better is 17...Ne3 18.Qb1 Nd3 19.Qd3 Qd3 20.Bd3 Bf3–+) 18.Bd4?? (better is 18.Ra2 Ne3 19.Qb1+=) 18...Bf3–+ 19.Bf3 Nd4 20.ed4 (20.Bd5 Qd5 21.0–0 Nb5 22.Rf4–+) 20...Qh4 21.Kd2 (21.Ke2 Nc3 22.Kd2 Nd1 23.Re1 Kd8 24.Kd1 Qd4–+) 21…Bh6 (21...Bh6 22.Ke2 Nc3 23.Kf1 Nd1 24.Rd1 Be3–+) 0–1. Marchant,Murray Scott – Zalla,Remo Orlando, corr ARG–CAN, 1975.

4.c4 cb5 5.cb5 d6 6.Nc3 Bd7 7.e3 Nf6 8.Na4 Qc7 (8...e5 9.Bb2+=) 9.Nc3 d5 10.Nf3 Qc5 (10...e5 11.Qb3 Qd6 12.Bb2+=) 11.Be2 Bg4 12.a4 Nbd7 13.h3 Bf3 14.Bf3 Rb8 (14...e6 15.0–0+–) 15.Ba3 Qc4 16.Be2 Qc7 17.Rc1 Qe5 18.f4 Qf5 (18...Qe6 19.0–0+–) 19.0–0 (19.g4!? Qg6 20.g5 Ne4 21.Nd5 Ng3+–) 19...g5 20.fg5 Qg5 21.Bf3 Rg8 22.Rf2 Ne5 23.Nd5?? (23.Qe2 Rd8+–) 23...Nd3?? (23...Nf3 24.Qf3 A) 24...Nd5?? 25.Qf7 Kd7 26.Rc5+– (26.Qh7?! Nf6 27.Qd3 Qd5 28.Qd5 Nd5+–); B) 24...Qd5–/+) 24.Nf6+– ef6 25.Bf8 Nf2 26.Kf2 Qg3 (26...Kf8 27.Kf1+–) 27.Kf1+– Kf8 28.Qc2 Kg7 29.Qc7 Rbf8?? (29...Qc7 30.Rc7 b6+–) 30.Qg3 Kh8 31.Qf4 Rg5 32.Qf6 Rg7 33.Rc4 h5 34.Bh5 b6 35.Bf3 (35.Rg4 Rfg8 36.Bf7 Kh7 37.Rh4) 35...Rfg8 (35...Kg8 36.Bd5 Rg3 37.Bf7 Rf7 38.Rc8 Rf8 39.Rf8 Kh7 40.Rh8) 36.Rh4 1–0. GuestMMBV – GuestNKCH, freechess.org, 2017.

4.c4 c5 5.Bb2 Qc7 6.d4 b6 (6...cd4 7.Qd4 d6 8.Nc3=) 7.d5 d6 8.g3 Kd8 (better is 8...Nf6!?+=) 9.Bg2 Nd7 10.e3 Bb7 11.Ne2 f6? (better is 11...Ngf6!?+/–) 12.0–0 (12.Nf4 Qc8+–) 12...Ne5 (12...g5 13.Nd2+–) 13.Nd2 Bc8 14.Nf4 Ra7 15.Ne6 Be6 16.de6 Qc8 17.f4 Ng6 18.f5 Ne5 19.Nf3 g6?? (19...Nc4 20.Bc1+–) 20.e4 (20.Be5 Nh6+–) 20...g5?? (20...Nc4 21.Bc1+–) 21.h3 (21.Ne5!? fe5 22.Be5 Nf6+–) 21...h5? (better is 21...Nc4 22.Bc1 Nh6+–) 22.Nh2 (better is 22.Be5 fe5 23.Ne5+–) 22...g4 (22...Nc4 23.Bc1+/–) 23.h4 (23.Be5 fe5 24.hg4 Bh6+/–) 23...Nh6 24.Bc3 Bg7 25.Rc1 Nc4 26.Bf6 Bf6 27.Rc4 Be5 28.Kf2 (< 28.Ra4 Ra4 29.Qa4 Bg3=) 28...Ng8 29.Ra4 Ra4 30.Qa4 Qb7 31.Qa6 (better is 31.Rd1+=) 31...Qa6=+ 32.ba6 Kc7 33.Rb1 Nf6 34.Nf1 Ra8 35.Ne3 Ra6 36.Nc4 Bd4 37.Ke2 Kc6?? 38.Bf1?? Ne4 39.Ne3?? Nc3 40.Kd3 Nb1 41.Nc4 Ra4 42.Ke4 d5 43.Kf4 dc4 44.Kg5 c3 45.Bd3 Nd2 46.Kh5 Nf3 47.Kg6 c4 48.Bc2 Ra3 49.h5 Ra2 50.Be4 Kd6 51.h6 c2 52.Bc2 Rc2 53.f6 ef6 54.h7 Rh2 55.e7 Ke7 56.Kf5 Ng5 57.h8Q Rh8 58.Kg4 c3 59.Kf5 c2 60.g4 c1Q 61.Kg6 Qc2 62.Kg7 f5 63.Kg6 Qc6 64.Kf5 Qc5 65.Kf4 Ne6 66.Ke4 Rh4 67.Kd3 Qc3 68.Ke4 Rg4 69.Kd5 Qc5 0–1. MasterofDisaster – Flip4, Live Game Caissa's Web, 2004.

4.c4 d5 5.cd5 cd5 6.Nc3 d4 7.Na4 e5=.

4.c4 d5 5.e3 cb5 6.cd5+= Qd5 7.Nc3 Qf5 8.Bb5 Bd7 9.Ba4 (9.Rb1 Ra5 10.e4 Qg6 11.Bd7 Nd7 12.Rb7 Qg2+=) 9...Ba4= 10.Na4 Qe4 11.Nb6 (11.Nc3 Qg2 12.Qf3 Qf3 13.Nf3 Nc6=) 11...Ra6= 12.Rb1?? (better 12.Qb3 Qg2 13.Qd5=) 12...Qb1–+ (12...Qb1 13.Nd5 Ra5–+) 0–1. GuestNSXV – GuestLh, freechess.org, 2017.

4.c4 d5 5.e3 Qb6 (5...e5!?=) 6.Nc3+= e6 (6...Nf6 7.d4+=) 7.Bb2 (7.Na4 Qa5 8.Nc3 Nf6+=) 7...dc4 8.Bc4 Bd7 (8...cb5 9.Bb5 Bd7 10.Rb1=) 9.Rb1 (9.Na4 Qa5 10.Nc3 cb5+=) 9...cb5 10.Bb5 (10.Nb5!? Qc6 11.Bf1+=) 10...Bb5= 11.Nb5 Qb5 12.Bg7! Qg5 (12...Bg7 13.Rb5) 13.Bh8 Qg2 14.Qf3 Qf3 15.Nf3 Nc6 (15...Ba3 16.Rg1 Ne7 17.Rg7+/–) 16.Rb7 (better is 16.Rg1!? Nh6 17.Bg7 0–0–0+–) 16...Ba3 17.Ng5 (17.Rg1 Nge7 18.Rg7 0–0–0 19.Re7 Be7 20.Rh7 f6=) 17...Be7 (17...Nd8 18.Rc7+/–) 18.h4 (18.Nh7!? Rb8 19.Rb8 Nb8+–) 18...h6 19.Ne4 f5 20.Ng3 Nf6 21.Bg7 a3 22.Ke2 Ne5 23.Ra1 Nfg4 24.Ra2 Nc4? 25.Nh5 Kf7 26.Bc3 Ke8? 27.Ng7 Kf7 28.Nh5?? Ra4?? 29.Nf4 e5?? 30.Nd5+– Nge3 31.fe3 Nd6 32.Re7 Kf8 33.Re5 Ne4 34.Rf5 Ke8 35.Nc7 Kd7 36.Nb5 Ke8 37.Re5 Kf7 38.Nd4 Nf6 39.Rf5 Kg6 40.e4 Ng4 41.Nc6 Re4 (42.Kf3 Kf5 43.Nd4 Rd4 44.Bd4 Nh2 45.Kg3 h5 46.Kh2 Kg4+–). stoker – oss2, Caissa.com, 2004.

4.e4 d5 5.ed5 cd5 =.

4.e4 d5 5.e5 Bf5 (5...Nd7 6.Nf3+=) 6.Be2 (6.Nf3 Nh6+=) 6...e6 7.Nf3 (7.d4 cb5 8.Bb5 Nd7=) 7...Nh6 (7...d4 8.0–0=) 8.d4+= Ng4 (8...Be7!?+=) 9.0–0+– h5 10.h3 Nh6 11.Nbd2 (better 11.Nc3!?+–) 11...g5= 12.c4 (12.Ne1!?=) 12...g4=+ 13.hg4 hg4 14.Nh2? (better 14.Ne1=+) 14...Qh4–+ 15.Ndf3 (15.g3 Qh3 16.Re1 Be4 17.Ne4 Ng8–+) 15...gf3 16.g3?? (16.Nf3 Qh5 17.Nh2–+) 16...Qh3 17.Bf3 Ng4! 18.Ng4 (18.Bg4 Qh2 Mate attack; 18.Ng4 Bg4 Combination) 18...Bg4 19.Re1 Qh2 (better 19...dc4!? 20.Rb1–+) 20.Kf1 Qh3 21.Kg1 Qh2 (21...dc4!? 22.Rb1–+) 22.Kf1 Bf5 (22...dc4!? 23.Be3 Qh3 24.Bg2 Bd1 25.Bh3 Rh3 26.Kg2–+) 23.Ke2 (23.bc6 bc6 24.cd5 cd5–+) 23...Be4 (23...dc4 24.Bf4 Qh7 25.Qd2–+) 24.Bf4 (24.bc6 Nc6 25.cd5 ed5–+) 24...Bf3 25.Kf3 Qh5 (25...dc4 26.Qd2 Qh5 27.g4 Qh3 28.Bg3 cb5 29.d5–+) 26.g4 (26.Ke3 Qd1 27.Red1 dc4 28.bc6 Nc6–+) 26...Qg6 (26...Qh3 27.Bg3–+) 27.Kg3 (27.cd5 cd5 28.Qb1 Qb1 29.Reb1 Nd7–+) 27...Be7 (27...Qh7 28.Kf3–+) 28.Rh1 (28.Qe2–+) 28...Rf8 (better 28...Rh1 29.Qh1 dc4–+) 29.c5 (29.Rh6!? Qg7 30.bc6 bc6 31.cd5 cd5 32.Qc2–/+) 29...cb5 30.Qe2? (30.Rh6 Qg7 31.Qd3 Nc6 32.Qb5 f5 33.ef6 Bf6–+) 30...Nd7 (better 30...Nc6!? 31.Rad1 Rg8 32.f3–+) 31.Qb5 Rg8 32.f3 f5?? (32...Qc2 33.Rab1 Ra7 34.Qb2 Qb2 35.Rb2–+) 33.Rh6 (better 33.ef6 Qf6 34.Be5=) 33...Qf7–+ 34.Rah1 fg4 35.Rh8? (better 35.fg4 Qf5 36.Qe2–+) 35...gf3 36.Kf3 Qg6 (36...Rh8!? 37.Rh8 Bf8 38.Qd3–+) 37.Rg8 Qg8 38.c6?? (38.Rh6–+) 38...bc6 39.Qc6 Rb8 40.Qa4 (40.Qc1–+) 40...Qf8 (40...Qg6 41.Qd1 Rb2–+) 41.Qc2 Kd8 (41...Ba3?! 42.Rh7 Qg8 43.Rd7 Kd7 44.Qa4 Kd8 45.Qa3–+) 42.Rg1 (42.Qg6 Rb6–+) 42...Ba3 (42...Rc8 43.Qd2–+) 43.Qa4 (43.Qg6 Rb3 44.Kg4 Qb4 45.Qe6 Qd4–+) 43...Bb2 (better 43...Be7 44.Rg2 Rc8–+) 44.Ke2 (44.Rh1–+) 44...Ba3 (better 44...Qf4 45.Rg8 Nf8 46.Qa5 Ke8 47.Qa4 Kf7 48.Qa7 Kg8 49.Qb8 Bc3–+) 45.Bg5?? (45.Kf3 Be7 46.Rg2–+) 45...Ke8–+ 46.Bf6 (46.Bd2 Qh8 47.Qc2–+) 46...Rb2 (better 46...Qh6 47.Qa3 A) 47...Nf6?! 48.Qa4 (48.ef6?? Rb2 49.Qb2 Qh2 50.Kd3 Qb2–+) 48...Nd7 49.Rg8 Kf7 50.Rb8 Qh2 51.Kd1 Qg1 52.Kc2 Qf2 53.Kd3 Qf3 54.Kd2 Qf4 55.Kc2 Qe4 56.Kc3 Qe3 57.Kc2 Qe2 58.Kb1 Nb8 59.Qa7 Kg6 60.Qb8–+; B) 47...Rb2 48.Qb2 Qh2 49.Kf3 Qb2 (49...Qg1?! 50.Bh4=) 50.Rg8 Nf8–+) 47.Kd3?? (47.Kf3 Qh6 48.Qa8 (48.Qa3 Qh3 49.Kf4 Rf2 50.Kg5 Rf5 51.Kg6 Qh5 52.Kg7 Qf7 53.Kh8 Rh5) 48...Rb8 49.Qa3 Nf6 50.ef6 Qf6 51.Ke3 Qh6 52.Kf3 Qh3 53.Rg3 Qf5 54.Kg2 Qc2 55.Kh3 Qh7 56.Kg2=+) 47...Rb4 (47...Qh6 48.Qa8 Rb8 49.Rg8 Bf8 50.Qb8 Nb8–+) 48.Qc6 (48.Qa8 Rb8 49.Qc6 Rb3 50.Ke2 Rb2 51.Kd3 Rb3 52.Ke2 Rb2 53.Kd3 Rb3=) 48...Rb3 (better 48...Rd4! 49.Ke2 Re4 50.Kd1 Re5 51.Qc8 Kf7 52.Qd7 Kf6–/+) 49.Kc2 Rb2 50.Kd3 Rb3 51.Ke2 Rb2 52.Kf3 Rb3 53.Ke2 Rb2 54.Kf1 Rb1 55.Kf2 Rb8?? (better 55...Rb2 56.Kf3 Rb3 57.Ke2=) 56.Qe6+– Be7 57.Rg8 Rb2 58.Kf3 Rb3 59.Kf4 Nf6 60.Rf8 (60.ef6 Rb7 61.Qc8 Bd8 62.Rf8 Kf8 63.Qd8 Kf7 64.Qd5 Kf6 65.Qc6 Ke7 66.Qb7 Kd6 67.Kg5 Ke6 68.Qc6 Ke7 69.Kg6 Kd8 70.Qb7 Ke8 71.Qc7 Kf8 72.Qf7) 60...Kf8+– 61.ef6 Bd8 (61...Bb4+–) 62.Qd5 Bc7 63.Ke4 Re3 (63...Rg3 64.Qd7 Kg8 65.Qc8 Bd8 66.Qd8 Kf7 67.Qe7 Kg8 68.f7 Kg7 69.f8Q Kg6 70.Qf5 Kh6 71.Qeh7) 64.Ke3 Bf4 (64...Bd6 65.Qd6 Kf7 66.Qe7 Kg6 67.Kf4 Kh6 68.Kf5 Kh5 69.Qh7) 65.Kf4 Ke8 66.Qe6 (66.Qb7 Kf8 67.d5 Ke8 68.Qe7) 66...Kd8 67.Qe7 Kc8 68.f7 Kb8 69.f8R (69.f8Q) 1–0. peteywheatstraw – lemonbloodycola, gameknot.com, 2014.

4.e4 Nf6 5.e5 Nd5 +=.

4.Nf3 cb5 5.e3+= Qb6 (5...d5 6.Nc3+=) 6.Nc3+/– b4 7.ab4 Qb4 8.Ba3 Qg4 9.Nd5 Kd8? (better is 9...Ra5 10.Nb6 d5+/–) 10.Bc5+– Na6 (10...Ra6 11.Bb6 Rb6 12.Nb6 Qb4+–) 11.Bb6 Ke8 12.Ba6 ba6 (12...e6 13.Nc7 Ke7 14.Bf1+–) 13.Nc7 Kd8 14.Na8 Ke8 15.Nc7 Kd8 16.Na6 (16.Ne5 Qd1 17.Kd1 Nh6 18.Na6 Ke8 19.Nc7 Kd8 20.Ra4 f6+–) 16...Ke8 17.Nc7 Kd8 18.c3 (18...Bb7 19.Ra4+–) 1–0. orane – monlar, Caissa.com, 2006.

4.Nf3 d5 5.e3 =.

3.a3 d5

4.Bb2 c5 5.e3 Nf6 6.c4N d4 7.ed4 cd4 8.d3 e5 9.Nf3 Bd6 10.Be2 Nbd7 11.0–0 Nc5 Black prepares e4 12.Nbd2 0–0 13.Qc2 h6 14.Rad1 Bf5 Black prepares e4 15.Rfe1 e4 (15...Rc8!?+=) 16.Ne4 (16.Nd4? ed3 17.Qc3 de2 18.Re2 Bg6–+) 16...Nfe4 (worse is 16...Nce4 17.de4 Be4 18.Qd2+/–) 17.de4 Be4 18.Bd3 Bf3 (worse is 18...Nd3 19.Re4 Nb2 20.Qb2+/–) 19.Bh7? (19.gf3 Qh4 (worse is 19...Nd3 20.Qd3 Qg5 21.Kf1+=) 20.Bd4 Qh2 21.Kf1 Ne6–/+) 19...Kh8 20.Rd4?? (20.gf3 Qh4 21.Bd4 Qh2 22.Kf1–+) 20...Qg5–+ 21.g3 Be5 22.Bf5?? Bd4 23.Bd4 Rfe8 24.Be3 Re5 25.Bh3 Qh5 26.Bf1 Rae8 27.Bg2 b6 28.Qc3 Bg2 29.Kg2 Qg6 30.h4 Qd3 31.Qc1 Qe4 (31...Qe4 32.Kh2 Nd3–+) 0–1. Pierangeli,A (1960) – Caruso,Au (2255), 1st Open Cento ITA, 2011.

4.Bb2 d4 5.d3 Ra5 6.c4 dc3 (6...e5 7.Nf3 Bd6 8.e3=) 7.Nc3+= c6 8.bc6 Nc6 9.Nf3 b5 (9...e5 10.e3=) 10.g3 (10.d4 Nf6+–) 10...f6 (10...e5 11.Bg2=) 11.Bg2 (11.d4 e5 12.de5 Qd1 13.Rd1 fe5+– (13...Ne5? 14.Ne5 fe5 15.Rd5+–)) 11...e5 12.0–0 Nd4 (12...Bb7 13.e3+=) 13.Nd4 ed4 14.Ne4 Bb7 (14...f5 15.Nd2+–) 15.f4 (15.Qd2 f5 16.Nd6 Bd6 17.Bb7 Be5+–) 15...Ba8 (15...f5 16.Ng5 Bg2 17.Kg2+=) 16.Rc1 (16.e3 de3 17.Bc3 f5+=) 16...f5 17.Nf2 (17.Ng5 Bg2 18.Kg2 Nf6+=) 17...Bg2= 18.Kg2 Qd5 19.Kg1 Nf6 (19...Ra6 20.e4 de3 21.Qe2=) 20.Qc2 (20.Rc8 Kd7 21.Qd2 Ra8 22.Ra8 Qa8+–) 20...Ra8 21.Qc6 (better 21.Rfe1!?+=) 21...Qc6=+ 22.Rc6 g6?? (better 22...Kd7 23.Rc2 Ke6=+) 23.Bd4 (better 23.Rf6 b4 24.Bd4+–) 23...Bg7?? (better 23...Ba3 24.Rf6 Ke7+–) 24.Bf6 (24.Rf6?! Ke7 25.Rf5 Bd4 26.Rb5 Rhc8+–) 24...Bf6 25.Rf6 b4 26.ab4 a3 (26...Ke7 27.Rb6+–) 27.Ra1 Ke7 28.Rc6 Rhb8 (28...Ra4 29.Ra2+–) 29.Rc4 (29.Rc3 a2 30.Rc2 Rb4 31.Raa2 Ra2 32.Ra2 h6+–) 29...Ra4 30.Kg2 a2 31.Kf3 Rba8 32.h3 Ra3 33.g4 Rb3 (33...R8a4 34.gf5 gf5 35.Rc7 Ke6 36.b5+–) 34.gf5 (better 34.Rc2 Rba3 35.gf5 gf5 36.e4+–) 34...Rb1 35.Rc1 Rc1 36.Rc1 a1Q 37.Ra1 Ra1 38.fg6 hg6 39.d4 (39.e4 Rb1 40.f5 gf5 41.ef5 Kf6+–) 39...Rb1 40.Nd3 Rb3 (40...Rh1 41.Kg3+–) 41.Ke4 Ke6 (41...Kf6 42.Kd5+–) 42.e3 (better 42.Nc5 Kd6 43.Nb3+–) 42...Kd6 (42...Rb1 43.d5 Kd6 44.Kd4+–) 43.h4 (better 43.Ne5+–) 43...Ke6 (43...Ke7 44.d5+–) 44.d5 (better 44.Nc5 Kd6 45.Nb3+–) 44...Kd6 (44...Ke7 45.Kd4+–) 45.Kd4 Rb1 46.Kc4 (46.e4 Rd1+–) 46...Rh1 47.e4 Rh4 48.e5 Kd7 49.b5 Rh1 (49...g5 50.Kd4+–) 50.Kc5 Rb1 (50...Rd1 51.e6 Ke7 52.Ne5 Rc1 53.Kb6+–) 51.e6 Ke7 52.Ne5 (better 52.b6 Rb3 53.Nb4 Rc3 54.Kb5 Rh3+–) 52...Rc1 53.Kb6 Rg1 (53...Rd1 54.Ng6 Kd6+–) 54.Kc7 Rc1 (54...Kf6 55.b6 Rc1 56.Nc6+–) 55.Nc6 Kf6 56.b6 Rb1 57.b7 Kf5 58.b8Q Rb8 (58...Rb8 59.Nb8 Kf4+–). e4_e5_f4 (1725) – harun01 (1755), lichess.org, 2021.

4.Bb2 Bd7 5.e3 Ra5 6.Bc3 Ra7 7.Nf3 Nf6 8.Ne5 e6 9.Nd7 Nfd7 10.Be2 Qg5 11.0–0 Bd6 12.f4 Qf6?? 13.Bd4 (13.Bf6 Nf6 14.b6 cb6+–) 13...b6 (13...Qh6 14.Ba7 g5+–) 14.d3 (14.Bf6 Nf6 15.c4 dc4 16.Bc4 0–0+–) 14...Nf8?? (better 14...Qh6!?+=) 15.Nd2 (better 15.Bf6 gf6 16.Nd2+–) 15...Qg5?? (15...Qh6 16.Rf3 Bc5 17.Rh3 Bd4 18.Rh6 Be3 19.Kh1 gh6 20.f5+–) 16.g3 (16.fg5 e5 17.Bb2 Ne6+–) 16...Ra5?? (better 16...Qh6+–) 17.c4 (better 17.fg5 Rb5 18.Bg7 Rg8+–) 17...Na6?? (17...Qh6 18.Bf3 Nfd7+–) 18.Ne4! Nb8 (18...de4 19.fg5) 19.Bf3 (19.Nd6 cd6 20.fg5 Nfd7 21.Bg7 Rg8+–) 19...Kd7?? (19...Qe7 20.Nd6 Qd6 21.Bc3+–) 20.Rf2 (20.Ng5 f6 21.Nf7 Rg8+–) 20...Rb5 (20...Qe7 21.cd5 f6+–) 21.Ng5 f6 22.Bc3 (better 22.Nf7!? Rb3 23.Nh8 dc4 24.dc4 Ke7+–) 22...Rg8 (22...Rb3 23.Nf7 Rg8 24.Nd6 cd6+–) 23.Qb1 (23.Qa4 fg5 24.fg5 Kd8 25.Qb5 dc4 26.Qc4 Bc5+–) 23...Rb2?? (23...Rb1 24.Rb1 fg5 25.cd5 gf4 26.gf4+–) 24.c5 (better 24.Qb2 fg5 25.Qb5 Kd8 26.fg5 dc4 27.Qc4 Bc5+–) 24...Rc2?? (better 24...Rb1 25.Rb1 Bc5 26.Ne6 Ne6+–) 25.Qd1 (better 25.Qc2 Bc5 26.d4+–) 25...f5 (25...Rc3 26.Qa4 Nc6 27.cd6 fg5 28.dc7 Kc7 29.fg5 Ng6+–) 26.Bd2 (26.Bd2 Rc5 27.Qa4 Rc6 28.Rc1+–; better 26.Qc2 Bc5 27.Qa4 Ke7+–) 1–0. retiponziani (1775) – NIGHTIME, ChessWorld.net, 2014.

4.Bb2 Bd7 5.e3 Ra5 6.Bc3 Ra7 7.Nf3 Nf6 8.Ne5 (8.Bd4 Ra5 9.c4 dc4+–) 8...e6 9.Nd7 (9.Qf3 c5+=) 9...Nfd7 (9...Nbd7!? 10.Bb2 Bd6=+) 10.Be2 (10.Bd4 Nb6+=) 10...Qg5 (10...Ra8!?+=) 11.0–0+– Bd6 12.f4 Qh6 13.Bd4 b6 14.d3 (14.Rf3 e5 15.Rh3 Qe6 16.fe5 Ne5 17.Be5 Be5+–) 14...Nf6 (14...e5 15.fe5 Be5 16.g3 Bd4 17.ed4 Qe3 18.Kg2 Qd4 19.c3=) 15.Nd2 (15.Rf3 c5 16.Rh3 Qh3 17.gh3 cd4 18.ed4 Bf4+–) 15...0–0 (15...e5 16.fe5 Be5 17.Nf3 Bd4 18.ed4 Qe3 19.Kh1=) 16.h3 (16.Rf3 c5 17.Bc3 Nbd7+=) 16...Ra5 (16...e5 17.fe5 Be5 18.Nf3 Bd4 19.ed4=) 17.c4 (17.Bc3 Ra8 18.Nf3 Nbd7+=) 17...Nbd7 (17...e5 18.Bc3 Ra7 19.Bg4 ef4 20.Bf6 gf6 21.ef4 Bf4 22.Nf3=) 18.Bc3= Raa8 19.Nf3 (19.Bf3 Qg6 20.Qc2 Rfe8=) 19...Nc5 (19...dc4 20.dc4 e5 21.Ng5–/+) 20.Ne5= Be5 21.Be5 Ra7 22.Kh2 (22.Qc2 dc4 23.Qc4 Nb3+=) 22...Ncd7 (22...dc4 23.d4 Nce4 24.Bc4+=) 23.g4 (better 23.Bd4 dc4 24.Bf3+=) 23...g5? (better 23...Ne5!? 24.fe5 Nd7=) 24.fg5+– Qg5 25.Bf4 Qg7 26.d4 Re8 27.Qc2 Qf8 (27...e5 28.de5 Ne5 29.g5+–) 28.cd5 (28.g5 Ne4+–) 28...ed5 (28...Nd5!? 29.Bd3 Qg7+–) 29.Bd3 (29.Qa2 Qe7+–) 29...Ne4 (29...Qe7 30.Qa2+–) 30.Be4 (30.Bc7? Rc8 31.Be4 de4 32.Qe4 Rac7–+ (32...Rcc7?! 33.Kg2–+)) 30...de4 31.Qc6 (31.Bc7? Rc8–+) 31...Nb8 32.Qd5 Qg7?? (32...Qe7+–) 33.Be5 Re5 (33...Qf8 34.Rf5 Re6 35.Raf1+–) 34.de5 h6 (34...c6 35.bc6 Nc6 36.Qc6 Qe5 37.Kg2+–) 35.Qe4 (35.e6 c5+–) 35...Nd7 (35...Qg6 36.Qg6 fg6 37.Rad1+–) 36.e6 Nf6 (36...Nc5 37.e7 Ne4 38.e8Q Qf8 39.Qe4+–) 37.Qf5 1–0. retiponziani (1775) – NIGHTIME, ChessWorld.net, 2014.

4.Bb2 Nd7 5.e3 Nc5 6.Nf3 f6 (6...e6 7.d4 Ne4 8.Bd3=) 7.d4+= Ne4 8.Nbd2 b6 (8...Bg4!?+=) 9.Bd3+/– Bf5 10.c4?? (10.Nh4!? e6 11.Nf5 ef5 12.c4+/–) 10...Nh6 (better is 10...Nf2 11.Kf2 Bd3–/+) 11.Qc2+/– Qd6? (better is 11...Nd2!? 12.Qd2 e6+=) 12.Ne4+– de4 13.Be4 (13.Be4 e6 14.Bf5 Nf5 15.e4+–) 1–0. Fournier,Frederic (1980) – NN, jeu.europe–echecs.com, 2013.

4.Bb2 Bf5 5.Nf3 e6 6.e3 Nf6 7.d4 (7.Be2 Bg4=) 7...Bd6 8.Bd3 (8.c4 dc4 9.Nc3 Nd5=) 8...Bg6 (8...0–0 9.Bf5 ef5 10.0–0=) 9.Nh4 (9.0–0 Nbd7=) 9...Nbd7 (9...Bd3!? 10.Qd3 c6=+) 10.Ng6= hg6 11.Nd2 Nb6 (11...Bh2? 12.Nf1+–) 12.c4 dc4 (worse 12...Bh2 13.c5 Nc4 14.Bc4 dc4 15.Nf1+–) 13.Nc4 Nc4 (worse 13...Bh2 14.Nb6 cb6 15.Qf3+–; worse 13...Rh2 14.Rh2 (14.Nd6?! Qd6 15.Rh2 Qh2=+) 14...Bh2 15.Nb6 cb6 16.g3+–) 14.Bc4 Ne4 (better 14...g5=) 15.f3?? (15.Qf3 f5 16.Bd3+= (worse 16.Be6 Ng5 17.Qb7 Ne6=+)) 15...Qh4 (15...Bg3 16.Ke2 Nf2 17.Qc2 Nh1 18.Rh1 Rh2 19.Rh2 Bh2 20.Qe4–+) 16.Ke2 Qf2 17.Kd3 Qb2 (17...Qg2 18.fe4 Rh4 19.e5 Be5 20.Qe2 (20.de5?? Qb2 21.Bd5 Rd8–+) 20...Qe2 21.Ke2 Bh2 22.Rac1+–) 18.fe4 Qg2 (18...Ba3 19.Ra2 Qb4 20.Qa1+–) 19.e5 (19.Ra2 Qh3–/+) 19...Be7 (better 19...Be5!? 20.Ra2 Qh3–+) 20.Ra2–/+ Qg5 21.Rg1 Qf5 22.e4 Qh3 (22...Rh3 23.Rg3 Rg3 24.hg3–/+) 23.Rg3 Qh6 24.Rf2 (24.b6 c6 25.Qf1 Rd8–/+) 24...Bh4 (24...Ba3 25.b6 c6 26.Qf3–+) 25.Rh3 (25.Qf3 0–0–0 26.Qf7 Bg3 27.hg3 Qc1 28.Qe6 Kb8–+) 25...Qg5 (25...Bf2!? 26.Rh6 Rh6 27.Ke2 Rh2 28.Kf3–+) 26.Rff3 (26.Kc2 0–0–0 27.Rff3 Qg4–/+) 26...Qe7 (better 26...Rd8–/+) 27.Qc1? (27.Kc2 c6–/+) 27...0–0–0 (better 27...g5 28.Rfg3 0–0–0–+) 28.Kc3?? (28.Qc2 g5 29.b6=+ (29.Qa4? g4–+)) 28...Bf2! 29.Rh8 (29.Rf2 Rh3 Discovered attack (29...Rh3 Deflection)) 29...Bd4 30.Kc2 Rh8 31.h3 Be5 32.Kb1 Qc5?? (better 32...Kb8 33.Qc2–+) 33.Ka2 (better 33.Be6 Kb8 34.Qc5+–) 33...Qd4 (better 33...Kb8 34.Kb1–+) 34.Rf7 Rh3?? (better 34...Qe4 35.Rf2 Rh3 36.Be6 Kb8–+) 35.Be6= Kd8?? (better 35...Kb8 36.Bh3 Qd3 37.Rf8 Ka7 38.Qc5 b6 39.Qe5 Qb3 40.Ka1 Qd1 41.Kb2 Qd2 42.Kb1 Qd1 43.Kb2 Qd2 44.Kb1 Qd1 45.Kb2=) 36.Bh3+– Qe4 (36...Ke8 37.Be6 Qe4+–) 37.Qd2 (37.Qg5 Bf6 38.Rf8 Qe8 39.Qd5 Ke7 40.Qc5 Kd8 41.b6 Be5 42.bc7 Bc7 43.Qg5) 37...Bd4?? (better 37...Bd6 38.Kb2 Ke8+–) 38.Rf8 Ke7 (38...Qe8 39.Qd4 Ke7 40.Qc5 Kd8 41.Qg5) 39.Qb4 (39.Qb4 c5 40.bc6 Bc5 41.Qc5) 1–0. Dino_Jarach (1855) – OsiOdermatt (1830), lichess.org, 2020.

4.e3 Nd7 5.Bb2 Ngf6 6.Nf3 e6 7.Be2 Bd6 8.0–0 0–0 (8...e5 9.d4 e4 10.Nfd2=) 9.c4 c6 (9...Nc5 10.Nc3=) 10.Qc2 e5 11.d3 (11.Nc3 Qc7=) 11...Re8 (11...dc4 12.dc4 Qe7 13.Rd1=) 12.h3 (12.Nc3 Qc7=) 12...Qe7 (12...Nc5 13.cd5 cd5 14.Nbd2=) 13.Nbd2 (13.bc6 bc6 14.Nc3 dc4=) 13...Nf8 (13...cb5 14.cb5 Nb6 15.Bc3+=) 14.Kh1 (14.bc6 bc6 15.d4 Ng6+=) 14...Bd7 (14...Ng6 15.c5 Bc5 16.bc6–/+) 15.c5 Bb8 16.b6 Ng6 17.Nh2 (17.Rfe1 e4 18.Nd4 Nh4=) 17...h6 (17...Ra5 18.d4+=) 18.Rac1 Ra5 19.d4 (19.Nhf3 Rb5=) 19...e4+= 20.Bc3 Ra8 21.f4? (better is 21.Rfe1+=) 21...ef3!–+ 22.Rf3 (22.Ndf3 Qe3 Discovered attack; 22.Bf3 Qe3 Discovered attack; 22.Rf3 Nh4 Decoy; 22.gf3 Qe3 Discovered attack (22...Bh3 Deflection); 22.Nhf3 Qe3 Discovered attack) 22...Nh4 23.Rcf1 (23.Nhf1 Nf3 24.Bf3 Nh7–+) 23...Nf3 (23...Nh5 24.Bd3 Qg5 25.R1f2 Nf3 26.Nhf3 Ng3 27.Kg1 Qe3 28.Nf1 Nf1 29.Kf1–+) 24.Rf3 Nh5 25.Ndf1 (25.Nhf1 Nf4! 26.Bd1 Ng6–+) 25...f5 (25...Nf4 26.Ng3 Ne2 27.Ne2–+) 26.Rf2 (26.Bd3 Rf8–+) 26...Qg5 (26...Nf6 27.Bd3–+) 27.Nf3 (27.Bd3 Rf8–+) 27...Ng3 28.Kg1 Ne2 (28...Qe7 29.Bd3 Ne4 30.Re2–+) 29.Re2 Qe7 30.Bb2 (30.Re1 Be6–+) 30...Ra5 31.Qd2 (31.Bc3 Ra6–+) 31...Rb5 32.Qc2 Ra5 (32...Qe4!? 33.Ne5 Be5 34.de5–+) 33.Bc3?? (33.Qd2 Ra6–+) 33...Ra8 34.Bd2?? (34.Bb2 f4 35.Re1–+) 34...Qe4 35.Qe4 (35.Bc3 Qc2 36.Rc2 Re4–+) 35...Re4 (35...fe4 36.N3h2–+) 36.Be1 (36.Kf2 Kf7–+) 36...g5 37.N3d2 Re8 38.Kf2 Kf7 39.Nf3 Kg6 (39...g4!? 40.Ng1–+) 40.Bc3 h5 41.Ne5 Be5 42.de5 h4 (42...Rf8 43.Nd2–+) 43.Nh2 g4 44.hg4 (44.Nf1–+) 44...fg4 45.g3 (45.Kg1 Bf5–+) 45...Rf8 46.Kg2 (46.Kg1 hg3 47.Nf1 Rf3–+) 46...h3 47.Kg1 Bf5 48.Rf2 Kh5 (48...Be6 49.Rd2–+) 49.Rf4 Be6 50.Kf2 (50.Rd4 Rf7–+) 50...Rf4 51.ef4 Kg6 52.Ke3 (52.Nf1–+) 52...d4! 53.Kd4 (53.Bd4 Ra5 Combination; 53.Kd4 Rd8 Combination) 53...Rd8 54.Ke3 Rd1 55.Kf2 Rc1 56.Be1 Kf5 57.Bd2 (57.Ke2 Ra1 58.Kf2 Ra2 59.Ke3 Rh2 60.Bd2 Rg2 61.Bc1 h2 62.Bb2 h1Q 63.Bc3 Qd1 64.Bd2 Qd2#) 57...Rc2 (better is 57...Ra1!? 58.Nf1–+) 58.Ke3 (58.Nf1 Ra2–+) 58...Rc5 59.Nf1 (59.Kd3 Rb5 60.Bb4 c5–+) 59...Rc2 60.Kf2 (60.Nh2 Ra2 61.Nf1 Ra3 62.Kf2 Rf3 63.Ke1 Bc4–+) 60...Ra2 61.Ne3 Ke4 0–1. Pfueller,Volker – Hagermann,Hermann (1735), 2rd Berlin Germany, Senior Championship, 2010.

4.Nf3 Nf6 5.e3 =.

4.Nf3 Bg4 5.e3 Nd7 6.Bb2 Ngf6 7.Be2 g6 (7...e6 8.Bc3=) 8.0–0 Bg7 9.d4 (9.d3 Bh5=) 9...Ne4 10.Nbd2 Nd6 (10...Ndf6 11.c4=) 11.Rc1 (11.c4 0–0=) 11...Nb6 12.Ne5 Be2 13.Qe2 Be5 14.de5 Ndc4 15.Nc4 Nc4 Here comes the goal–getter 16.Bd4 (16.Rb1 0–0=) 16...0–0 17.Ra1 Qd7 18.f4 (18.b6 cb6 19.Rfc1 Rfe8–/+) 18...Qb5 19.Rf3? (19.Rab1 Qc6 20.Qd3 b6–/+) 19...Qa5 (19...Na3!? 20.Qf2 c5 21.Bc3–+) 20.Rd1 (20.Qd3 e6–/+) 20...Na3 21.e4 Nb5–+ 22.ed5 Nd4 23.Rd4 Rfd8 24.Qc4? a3 25.Qa2?? the position was bad, and this mistake simply hastens the end 25...Qe1 26.Rf1 Qe3 (26...Qe3 27.Rf2 Qd4–+) 0–1. Schmidbauer,Josef – Grallert,Juergen, Niederbayernliga, 2002.

3.a3 Nf6

4.Bb2 =.

4.Nf3 =.

3.Bb2 a3

4.Na3 d6 5.c4 c6 6.e3 cb5 (6...e5 7.bc6 Nc6 8.Nb5+=) 7.cb5 e6 8.Nc2 Bd7 9.Nf3 Be7?? (9...e5 10.Be2+–) 10.a4 (better 10.Bg7 Bf6 11.Bh8 Bh8 12.d4+–) 10...Nf6 11.Be2 0–0 12.0–0 d5 13.d4 Bc8 14.Ne5 Nbd7 15.Ne1 Ne5 16.de5 Nd7 17.Nf3 f5 18.ef6 Bf6 19.Nd4 Qe7 (19...Qe8 20.a5+–) 20.Bg4 (20.Ba3 Nc5 21.Qc2 b6+–) 20...Nc5 21.Ba3 b6 (21...Re8 22.Qc2 Bd4 23.ed4+–) 22.Nc6 (better 22.a5!?+–) 22...Qd6+– 23.Rc1 Ra4?? (better 23...Bd7 24.Qc2 Bc6 25.Bc5 bc5 26.Qc5 Qc5 27.Be6 Kh8 28.Rc5 Bb7+–) 24.Qa4!!+– Na4 Exploits the pin (24...Bb2 25.Bc5 bc5 26.Rc2+–) 25.Bd6 Rd8 (25...Bd7 26.Bf8 Kf8+–) 26.Nd8 Bd8 27.Rc8 (27.Rc8 Kf7 28.Rd8+–) 1–0. BeepBeepImAJeep (2620) – KillerBateman (2475), lichess.org, 2015.

4.Na3 e6 5.Nb1 Nf6 6.a4 (6.Nf3 d5+=) 6...d5 7.e3 Be7 (7...Bd6+=) 8.g4 (8.Nf3!?+–) 8...0–0= 9.g5 Nfd7 (9...Ne4 10.f4=) 10.h4 (10.f4 e5+=) 10...Bd6 (10...e5 11.Qh5=) 11.Bd3 (11.Nc3 b6+=) 11...Be5 (11...Nc5!?=) 12.Nc3+= c5 Black intends d4 (12...d4 13.ed4 Bd4 14.Qh5+=) 13.Nf3 (13.f4 Bd6+=) 13...Bd6 14.Nh2 (14.Be2 f6+=) 14...d4 (14...Qc7!? 15.Qh5 f5+=) 15.Ne4+= Be7 (15...Ne5!?+=) 16.ed4+– cd4 17.Bd4 e5 (17...f5 18.gf6! Nf6 19.Bb2+–) 18.Bb2 (18.Be3 Qc7+–) 18...Nc5 19.Nc5 Bc5 20.Qh5 (worse 20.Be5 Qd5 21.Nf3 Bg4=+) 20...g6 21.Qh6?? (better 21.Qf3!?+–) 21...Bd4 (21...Qd5 22.Rg1 Re8–+) 22.Bd4 Qd4 23.0–0–0?? (better 23.Rb1 e4 24.Be2 Qa4 25.c3+–) 23…Qa1 0–1. FeegLood (2630) – Kingscrusher_YouTube (2390), lichess.org, 2015.

4.Na3 Nf6 5.c4 e5 6.Nc2 d5 (6...d6 7.d4 e4 8.Ne3=) 7.e3 c6 (7...Nbd7 8.d4 e4 9.c5=) 8.a4 (8.Be5!? Nbd7 9.Bb2+–) 8...cb5 9.cb5 (better 9.ab5 Ra1 10.Ba1+=) 9...Bd7? (better 9...Bd6+=) 10.Be5+– Bc5 11.Nf3 Qe7 (11...Bg4 12.Be2+–) 12.Be2 0–0 13.0–0 Re8 14.Bb2 (14.d4 Bb6+–) 14...Bf5 15.d4 (15.Nfd4!? Bg6+–) 15...Bd6 16.Ne5 (16.Bd3 Be4+–) 16...Nbd7+– 17.f4 Ne4? (17...Be4 18.a5+–) 18.Bd3?? (better 18.g4 Bg6 19.f5 (19.Ng6?! fg6 20.a5 g5+–) 19...Ne5 20.de5 (20.fg6?! Ng6 21.Bd3 Qh4=+) 20...Be5 21.Be5 Qe5 22.fg6 hg6 23.a5+–) 18...f6 19.Nd7 Bd7 20.Ne1 Qe6 21.Nf3 Qg4 22.Qb3 Be6 23.a5 Rac8 24.a6 b6 (24...ba6 25.ba6 Rb8 26.Qa4+–) 25.a7 (25.Rfc1 Rc1 26.Bc1 Rc8+–) 25...Ra8 26.Ra6 Re7 27.Bc1 (27.Rfa1!? Bf7+–) 27...Raa7 28.Ra7 Ra7 29.h3 Qg3? (29...Qg6 30.f5! Qf5+–) 30.Be4 Bh3 (30...Kh8 31.Bd5 Bh3+–) 31.Qd5 Kh8 Threatening mate: Qxg2 32.Ng5! (32.Ng5 Bg2 33.Bg2 fg5 34.Qd6+–) 1–0. BeepBeepImAJeep (2670) – WNSMLZSM (2175), lichess.org, 2016.

4.Na3 Nf6 5.c4 g6 (5...d5 6.e3+=) 6.Nc2 Bg7 7.a4 0–0 8.e3 d5 9.Nf3 dc4 (9...c5 10.bc6 Nc6 11.cd5 Qd5 12.Bb5+=) 10.Bc4+– c5 11.0–0 Nbd7 12.d4 (12.Qe2 Nb6 13.Bb3 Bg4+–) 12...Nb6+= 13.Be2 Na4 14.dc5 Qd1 15.Bd1 (15.Rfd1 Bf5 16.Bf6 Bf6+=) 15...Be6 (15...Bd7 16.Bd4 Bb5 17.Re1=) 16.Bf6 (16.Bd4 Bc4+=) 16...Bf6= 17.Ncd4 Nc5 18.Ra8 Ra8 19.Ne6 Ne6 20.Bb3 Ra3 (20...Nc5 21.Bc4=) 21.Be6+= fe6 22.Rb1 Kf8 (22...Ra4 23.Kf1+=) 23.g3 (23.e4 h6+=) 23...Ke8 (23...g5 24.h3+=) 24.Nd2 (24.Kg2 e5+=) 24...Rc3 (24...Ra4 25.Kg2+=) 25.Kf1 (25.Kg2 h6+=) 25...Rc2 26.Ne4 Kd7 27.Kg2 Kc7 28.Kf3 (28.h4 h5+=) 28...Kb6 29.h4 Bb2 (29...h6!?=) 30.Rd1 (30.Ng5 h6 (30...Kb5? 31.Nh7 e5 32.Nf8+–) 31.Ne6 Rd2+–) 30...Rc7 (30...Kb5 31.Rd7 Kb6+–) 31.Rd3 (31.Ng5 Rc5+–) 31...Be5 (31...Bf6 32.Nf6 ef6 33.Rd6 Kb5 34.Re6=) 32.Rb3 (32.Ng5 Kb5 33.Nh7 Bg7+–) 32...Rc4 (32...Bf6 33.g4= (worse 33.Nf6 ef6 34.e4 h5–/+)) 33.Nd2 (better 33.Ng5!? h6 34.Ne6+–) 33...Rc3 34.Rb1 (better 34.Rb4=) 34...Kc5?? (better 34...Rc2 35.Ne4 h6=) 35.Ne4+– Kc4 36.Nc3 Kc3 37.Ke4 Bc7 (37...Bd6 38.h5+–) 38.g4 (better 38.Rc1 Kb4 39.Rc7+–) 38...Kc2 (38...Bd6 39.b6+–) 39.Rb4 (better 39.Ra1!? Bb6 40.Ra8 Kb3+–) 39...Kc3 40.Rd4 (40.Ra4 Bd6+–) 40...Bd6 41.h5 gh5 42.gh5 e5 (42...b6 43.h6+–) 43.Rd1 (better 43.Rd6 ed6 44.Kd5+–) 43...Kc4 44.Rb1 Kc5 (44...e6 45.Rg1 b6 46.Rg7+–) 45.Kf5 Kb6 (45...e4 46.Kg5 (worse 46.Ke4 Kb6+–) 46...Be5 47.Kh6+–) 46.Ke6 (46.Kg5 e4+–) 46...Kc5 47.Kf7 e4 (47...h6 48.Kg6+–) 48.Kg7 h6 49.Kh6 Be5 50.Kg6 Kc4 (50...b6 51.h6+–) 51.h6 Kd3 52.h7 Ke2 53.Rb4 Kf3 54.Re4 (better 54.Kf5 Bf6 55.Re4+–) 54...Ke4= 55.Kf7 Kf3?? (better 55...Bf6=) 56.Ke7+– Kf2 57.Ke6 Bh8 58.e4 (58.Kd7 Ke3 59.Kc7 Kd4 60.Kb7 Kc5+–) 58...Ke3 59.Kf5 (better 59.Kd6 Ke4 60.Kc7+–) 59...Kd4= 60.e5?? (better 60.b6=) 60...Be5–+ 61.Ke6 Bh8?? (better 61...b6–+) 62.Kd7?? (62.Kd6 Be5 63.Ke6–/+) 62...Kc5–+ 63.Kc7 (63.b6 Kb6 64.Kd6–+) 63...b6 64.Kb7 Kb5 65.Kc7 Kc5 66.Kd7 b5 67.Ke7 b4 68.Kf7 Bd4 69.Kg8 b3 70.Kf7 (70.h8Q Bh8 71.Kh8–+) 70...b2 71.Kg8 b1Q 72.Kf7 (72.h8N Kd6 73.Nf7 Ke6 74.Ng5 Ke7 75.Ne4 Qg1 76.Ng5 Qg5 77.Kh7 Qg7) 72...Bh8 (72...Qf5 73.Ke8 Qe6 74.Kf8 Qf6 75.Ke8 Kd6 76.h8Q Qe7) 73.Ke6 (73.Ke7 Qg6 74.Kd7 Qf7 75.Kc8 Kc6 76.Kd8 Qd7) 73...Qg6 74.Ke7 Qh7 (74...Bf6 75.Kd7 Qf7 76.Kc8 Kc6 77.h8Q Qc7) 75.Ke8 (75.Ke6 Qg6 76.Ke7 Bf6 77.Kd7 Qf7 78.Kc8 Kc6 79.Kb8 Qb7) 75...Be5 76.Kd8 Kc4 (76...Kd6 77.Ke8 Qe7) 77.Ke8 Kd5 78.Kd8 Ke6 79.Ke8 Qe7 0–1. BeepBeepImAJeep (2730) – abrito99 (2620), lichess.org, 2020.

4.Na3 h5 (4...d5 5.Nb1+=) 5.e3 h4 6.c4 h3 (6...e5!? 7.Nc2 d6+–) 7.Nh3+– Rh3? (better 7...d5!?+–) 8.gh3 Nf6 9.Bg2 Ne4 (9...d5+–) 10.Be4 c6 11.Qh5 d5 12.cd5 cd5 13.Bd5 (better 13.Qd5 Qd5 14.Bd5+–) 13...b6 (13...e6 14.Be4 Ba3 15.Ba3 Ra3+–) 14.Bf7 (14.Qf7 Kd7 15.Be5 Qe8 16.Bc6 Nc6 17.Qd5) 14...Kd7 15.Qd5 Kc7 16.Rc1 Nc6 17.Rc6 Kb7 18.Qd8 Bh3 (18...Rb8 19.Qb6 Ka8 20.Qa5 Kb7 21.Rc7) 19.Qb6 1–0. GuestXNRT – GuestLRJV, freechess.org, 2019.

3.Bb2 Ra5

4.c4 c6 (4...Nf6 5.Nf3=) 5.Bc3 (5.e4 cb5 6.cb5 d5 7.ed5 Nf6=) 5...Ra7 (5...Ra8 6.Nf3=) 6.Bd4+= Ra8 (6...b6 7.e4+=) 7.e3 (7.Nc3 d6 8.Na4 Nd7+=) 7...e6 (7...d6 8.Bc3=) 8.Nf3 a3 (8...d6 9.e4=) 9.Nc3 (9.Bd3 f6+=) 9...d5 (9...c5 10.Be5+=) 10.cd5 (10.bc6 bc6 11.Rb1 Ba6+=) 10...cd5 (10...c5 11.Be5 ed5 12.b6+–) 11.Be2 Bd7 (11...f6 12.Rc1+=) 12.Ne5 Bc8 (12...Ne7 13.0–0+=) 13.b6 Bd6 (13...Nf6 14.Nb5 Na6 15.Rc1+–) 14.Bb5 (better 14.Nc4 dc4 15.Bg7+–) 14...Bd7?? (better 14...Kf8 15.Qh5 Nh6+–) 15.Nd7+– Nd7 16.Bg7 Qg5 17.Bh8 Qg2 18.Rf1 Qh2 (18...Ke7 19.Bd7 Kd7 20.Nb5 Qh2 21.Qf3+–) 19.Qf3 (better 19.Nd5 Ra5 20.Qg4+–) 19...h5 (19...Qh6+–) 20.Bd7 (20.Rh1!? Qh1 21.Qh1 Ke7 22.Bd7 Kd7 23.Nd5 ed5 24.Qd5 Re8+–) 20...Kd7 21.Rh1 Qe5 (21...Qh1 22.Qh1 Ne7 23.Qh5 Rg8+–) 22.Be5 Be5 23.Qf7 Ne7 24.Rh5 Kd6 25.Re5! Ke5 (25...Ke5 26.Qf4) 26.Qf4 1–0. GuestWMQY – GuestZJXC, freechess.org, 2018.

4.e3 Ra8 5.Nf3+– b6 (5...e6 6.Be2+–) 6.d4 d5 (6...Nf6 7.Bd3+–) 7.Bd3 (7.c4 Nf6+–) 7...Nf6 8.0–0 Ne4 (8...Nbd7!?+–) 9.Ne5 (9.c4 Bg4+–) 9...Qd6 (9...e6 10.c4 a3+–) 10.Ba3 c5?! (10...Qf6 11.c4 Nd7+–) 11.bc6 Qc7 12.Qf3 (better 12.c4 Nc6 13.cd5 Ne5 14.Be4+– (14.de5?! Qe5 15.Qc2 Nc5 16.Bc5 bc5+–)) 12...Nc6 (12...e6 13.Bf8 Rf8 14.Be4 de4 15.Qe4 Ba6+–) 13.Qf7 Kd8 14.Qd5 Bd7 15.Nf7 Kc8 16.Qe4 Rg8 17.Qh7 Kb7 18.Qg8 Nd8 19.Qf8 Bh3 20.gh3 Nf7 21.Be4 Ka6 (21...Qc6 22.Qe7 Ka6 23.Bc6 Rb8 24.Qf7 g6 25.Bd6 b5 26.Bb8 Ka5 27.Qd5 g5 28.Qb5) 22.Qa8 Qa7 23.Bb7 Kb5 (23...Ka5 24.Qa7 Kb5 25.Qa6) 24.Nc3 Kc4 (24...Ka5 25.Qa7) 25.Qc8 1–0. DEFFM – GuestNFSR, freechess.org, 2019.

4.e3 d5 5.Nf3+=.

4.e3 d6=.

3.Bb2 b6

4.a3 Bb7 5.c4 d6 (5...d5 6.Nc3=) 6.e3 e5 7.Nf3 Nd7 8.Nc3 f5 (8...Nc5 9.Be2+=) 9.Na4+– Ngf6 (9...Be7 10.Be2+–) 10.Be2 g6 (10...Be7 11.d4+–) 11.Nc3 Bg7 Black prepares e4 12.0–0 0–0 13.d4 e4 (13...Ne4 14.Qb3 Rf7 15.Rfe1+–) 14.Nd2 g5 (14...Qe7 15.Qb3 Qf7 16.f3+–) 15.a4 (15.Qb3 Rf7+–) 15...Qe8 (15...f4 16.Qb3 Kh8 17.Rae1+–) 16.a5 (16.Nb3 Bc8+–) 16...ba5 17.Nb3 f4 (17...a4 18.Ra4 Ra4 19.Na4+–) 18.Ra5 (18.Na5 Qb8+–) 18...f3 (18...Qg6!?+–) 19.gf3+– ef3 20.Bf3 Bf3 21.Qf3 Ra5 22.Na5 g4 (22...Nb6 23.Qc6 Qc6 24.bc6+–) 23.Qg2 (23.Qb7!? Qb8+–) 23...Nb6 24.c5 (better 24.e4+–) 24...Nbd7? (24...Na4 25.cd6 Nb2 26.dc7 Qe6+–) 25.c6 (25.cd6!? cd6 26.Ba3 Qe6+–) 25...Nb6 26.Ne2 (26.e4 Qh5+–) 26...Ne4? (26...Qh5 27.d5 Qd5 28.Bf6 Qg2 29.Kg2 Rf6 30.Nb3+–) 27.Ng3 (better 27.Qg4 h5 28.Qh3+–) 27...Nd2+– 28.Rd1 Nf3 29.Kh1 Rf6 30.Nf1 (30.Ra1+=) 30...Qc8 (30...Qg6 31.Rc1 Nh4–+) 31.d5+– Rh6 (31...Rg6 32.Bg7 Kg7 33.Nd2+–) 32.Bg7+– Kg7 33.Nb3 Qf5 (33...Kh8 34.e4+–) 34.Nd4 Qe4?? (34...Nd4 35.Rd4 (35.ed4?! Nd5 36.Ne3 Ne3 37.fe3 g3 38.Qg3 Rg6+–) 35...Rg6 36.e4+–) 35.Nf3 (better 35.Ng3 Qg6 36.Ngf5 Kh8 37.Nh6 Nd4 38.Rd4 Qb1 39.Qg1 Qg1 40.Kg1+–) 35...Qf3 36.Rd4 (36.Qf3 gf3 37.e4 Kf6+–) 36...Qg2 37.Kg2 Rg6 38.Ng3 h5? (38...Rg5+–) 39.Nh5 Kh6 (39...Kf7 40.Kg3+–) 40.Nf4 Rg5 (40...Rg8 41.Kg3 Na8 42.Kh4+–) 41.Kg3 Re5 42.Kg4 Nc8 (42...Re7 43.h4+–) 43.Kf3 (43.Ne6!? Nb6 44.Nc7 Rg5 45.Kf3 Kg6+–) 43...Ne7 (43...Re7 44.Ne6+–) 44.h4 (better 44.e4!? Nc8 45.Ne6 Re6 46.de6 Kg6+–) 44...Nf5 45.Re4 (better 45.Rc4 Nh4 46.Ke2+–) 45...Nh4 46.Kg4 Re4 47.Kh4 (47.Kh4 Rb4 48.Kg4 Rb5 49.Kf5+–) 1–0. BeepBeepImAJeep (2725) – Mescalero81 (2390), lichess.org, 2020.

4.c4 Bb7 5.a3 d6 6.e3 Nd7 7.Nc3 e6 8.Na4 Nc5 9.Nc5 bc5 (9...dc5 10.Nf3+–) 10.Nf3 Nf6 11.Be2 Be7 12.0–0 d5 (12...0–0!?+–) 13.a4 0–0 14.d4 (14.a5 dc4 15.Ne5 Bd5+–) 14...cd4 15.Nd4 Ne4 (15...dc4 16.Bc4 Ra7 17.f3+–) 16.cd5 ed5 (16...Qd5 17.a5 Nd2 18.Bf3 Nf3 19.Qf3+– (worse 19.gf3 Bd6 20.Re1 Qg5 21.Kf1 e5–/+)) 17.Bf3 (17.a5 Re8+–) 17...Bf6 18.Rc1 (18.a5 Qe8+–) 18...Qd7 (18...Re8 19.Nc6 Bc6 20.Bf6 Nf6 21.Rc6+– (21.bc6?! Qd6+–)) 19.Ba1 Rac8? (better 19...Rfe8+–) 20.Nc6 (20.Bg4 Qd6+–) 20...Bc6 21.Bf6 (21.Rc6 Rce8 22.Qc2 Ba1 23.Rc7 Qd8 24.Ra1 Ng5+–) 21...Nf6 (better 21...Bb5!? 22.Bg4 Ba4 23.Bd7 Bd1 24.Bc8 Rc8 25.Rfd1 Nf6+–) 22.Rc6+– (22.bc6?! Qd6+–) 22...Qe7 23.Qd4 Rfd8 24.Rfc1 h6 (24...Rd6 25.Qc5 Rc6 26.Qc6+– (26.Qe7?? Rc1 27.Bd1 Rd1; 26.bc6?! Qe6+–)) 25.h3 (25.b6 Rd7+–) 25...Ne4 (25...Rd6 26.b6 Rc6 27.Rc6+–) 26.a5 White intends b6 (26.b6 Ng5+–) 26...Rd6 (26...Qh4 27.R1c2 (27.Rc7?? Qf2 28.Kh1 Rc7 29.Rc7 Qe1 30.Kh2 Qg3 31.Kg1 Qc7–+) 27...Rb8 28.R6c5+–) 27.b6 (27.Rd6!? Nd6 28.Qd5 Rb8+–) 27...Rc6 28.Rc6 (28.Rc6 Qd7 29.Rc7 Rc7 30.bc7 Qc7 31.Qd5 Qc1 32.Kh2+–) 1–0. BeepBeepImAJeep (2660) – Rovers84 (1695), lichess.org, 2017.

4.Nf3 e6 5.g3 Ra5 6.c4 c6 7.Bc3 Ra7 8.Bg2 Bc5?? (better is 8...Nf6+/–) 9.Bg7+– d5 10.cd5 cd5 11.0–0 Ra5 12.d4 Bb4 13.a3 Bd6 14.Nc3 Nd7 15.Bh8 Nh6 (15...Ngf6 16.Qc2+–) 16.Qd3 Qe7 (16...Ng4 17.Qh7 Ngf6 18.Qh6+–) 17.Qh7 Nf5 (17...Ng4 18.e4 Ba3 19.Qg8 Qf8 20.Qg4+–) 18.g4 Nd4 19.Nd4 Nf8 20.Qh6 Ng6 21.Nc6 Qh4 22.Qh4 Nh4 23.Na5 ba5 24.Bf6 Ng2 25.Kg2 Bb7 26.Rfd1 d4 27.f3 Bc5 28.Ne4 Bb6 29.Nd6 Kd7 30.Nb7 Kc7 31.Nd8 Kd7 32.Nc6 Kd6 33.Bd4 Bc7 (33...e5 34.Bb6 Ke6 35.Rac1 e4 36.Nd4 Ke5 37.Rc5 Kf6 38.Rc6 Kg5 39.h4 Kf4 40.Bc7 Ke3 41.Rc3) 34.Rac1 (34.Be3) 34...Kd7 (34...e5 35.Be5 Ke6 36.f4 Be5 37.Ne5 Ke7 38.Rd7 Kf6 39.Rc6 Kg7 40.Rf7 Kg8 41.Rc8) 35.Bf6 Ke8 (35...Kc8 36.Ne7 Kb7 37.Rd7 Kb6 38.Rdc7 Kb5 39.R1c6 e5 40.Rb7) 36.Ne5 Bb6 (36...Kf8 37.Rc7 Kg8 38.Rd8 Kh7 39.Rh8) 37.Rc8 Bd8 38.Rcd8# 1–0. ecluschei (2670) – jklaassen (1780), net–chess.com, 2015.

3.Bb2 c6

4.a3 cb5 5.Nc3 Nc6 (5...e5 6.e4 b4 7.ab4 Bb4 8.Nd5=) 6.Nb5 (6.e3 b4 7.ab4 Nb4+=) 6...d5= 7.e3 (7.Nf3 f6=) 7...Nf6 (7...e5 8.Rb1=) 8.Nf3 e5 (better 8...Bg4!?=) 9.Ne5+– Bc5 (9...Be7 10.Be2+–) 10.Be2 (10.Qf3 Be7+–) 10...0–0 11.0–0 Re8 (11...Bf5 12.Re1+–) 12.Nd3 (12.Nc6 bc6 13.Bf6 gf6+–) 12...Bb6 13.Rb1 Bf5 (13...Ne4 14.Nf4+–) 14.Bf6 Qf6 15.Nc3 Bc7 (15...Ne7!?+–) 16.Nd5+– Bh2 (16...Qd6 17.Nc7 Qc7 18.Rb5+–) 17.Kh2 Qd6 18.N5f4 (18.N3f4 g5+–) 18...g5 19.Kg1 (19.Rb7 gf4 20.Nf4 Qa3+–) 19...gf4 20.Nf4 Rac8? (better 20...Qa3!? 21.Rb7 Ne5+–) 21.Bd3 (21.Bg4 Qd7 22.Bf5 Qf5 23.Rb7 Nd4+–) 21...Bg6 22.Rb5 (22.Rb7!? Rb8 23.Rb8 Rb8 24.Ng6 hg6+–) 22...Ne5 (22...Qa3 23.Qg4 Qa2 24.Ng6 hg6 25.Bg6+–) 23.Rd5 (23.Rb7!? Nd3 24.cd3 Qa3+–) 23...Qf6 (better 23...Qa3!? 24.Bb5 Bc2+–) 24.Qa1 1–0. FeegLood (2835) – AMADAN (2380), lichess.org, 2016.

4.a3 cb5 5.e4 b4 6.ab4 e6 7.c4 Nf6 8.Ra4 Ra4 9.Qa4 Nc6 10.e5 Ng4 11.Nf3 Bb4 12.h3 Nh6 13.Be2 Nf5 14.0–0 0–0 15.d4 Be7 16.d5 ed5 17.cd5 Nb8 18.d6 Bg5 19.Nc3 Bh6 20.Nd5 Nc6 21.Bd3 g6 22.Nf6 Kh8 23.Bf5 gf5 24.Qh4 Kg7 25.Ng5 Rh8 26.Qh5 Qf8 27.e6 fe6 28.Nd7 e5 29.Nf8 (better 29.Ne6 Kg8+–) 29...Rf8 30.Rc1 Rf6 31.Rc6! bc6 (31...Bg5 32.Rc7 Kf8 33.Rc8 Kg7 34.Qg5 Rg6 35.Be5 Kf7 36.Qe7) 32.Be5 A pinning theme (32.Be5 Kf8 33.Nh7 Kg8 34.Nf6 Kg7 35.Nd7 Kg8 36.Qg6 Bg7 37.Qg7) 1–0. BeepBeepImAJeep (2675) – SupWitches (2435), lichess.org, 2019.

4.a3 Qb6 (4...d5 5.e3=) 5.e4 Nf6 6.c4 (better 6.Qe2!?=) 6...Ne4=+ The mate threat is Qxf2 7.d4 (7.Qf3 d5–/+) 7...e5 (7...cb5 8.cb5 d5 9.f3 Qa5 10.Nd2–+) 8.Nf3 Qa5 9.Nfd2 ed4 10.Qe2 (10.Bd4 d5=+) 10...d5 11.f3 (better 11.cd5 cd5 12.f3=+) 11...f5?? (better 11...d3 12.Qd3 Nc5 13.Qe3 Be6 14.bc6 d4 15.Bd4 Nc6=+) 12.fe4 de4 13.Bd4 Be6 (13...Qd8 14.Qf2+–) 14.Bc3 (14.Qh5 Kd7+–) 14...Qb6 15.Bb4 (better 15.g4!? e3 16.gf5 Bf5 17.Nf3+–) 15...Nd7 (15...Bb4 16.ab4 Qd4 17.Ra3 cb5 18.g4=) 16.Bf8 (16.bc6 Qc6 17.Bf8 Nf8+–) 16...Rf8 17.Nc3 Nc5 (better 17...Ne5 18.Qh5 Rf7+=) 18.g3?? (better 18.Qh5 Rf7 19.Qh7+–) 18...Nd3–+ 19.Kd1 Nf2 20.Kc2 Nh1 21.Bg2 (21.bc6 bc6 22.Nce4 fe4 23.Qe4–+) 21...Nf2 22.Rf1 (22.bc6 bc6 23.Rf1 Nd3–+) 22...Nd3 (22...Ng4 23.Re1 cb5 24.Nce4 fe4 25.Qe4–+) 23.Nde4 (23.g4 g6 24.gf5 gf5–+) 23...fe4 24.Qe4 (24.Rf8 Kf8 25.Be4 Ne5 26.Bh7 Qd4–+) 24...Rf2 25.Kd3 (25.Kb1 cb5 26.Nd5 Rb2 27.Ka1–+) 25...0–0–0 26.Nd5 Bf5 (26...cd5 27.Qe6 Qe6 28.Rf2 dc4 29.Kc2–+) 27.Qf5 Rf5 28.Rf5 cd5 29.Bd5 (29.Rd5 Rd5 30.Bd5 Qc5–+) 29...Qg6 30.Ke4 (30.g4 Qg4 31.Re5 Qd1 32.Ke4 g5 33.Be6 Kc7 34.Rc5 Kb6–+) 30...Qg4 (30...Rf8 31.Kd4 Qf5 32.Kc3 Qe5 33.Kd3 Rf1 34.Be4 Rd1 35.Ke3 Re1 36.Kd3 Qe4 37.Kc3 Qe3 38.Kb4 Rb1 39.Ka4 Qa7) 31.Rf4 Qe2 32.Kd4 Qd2 (32...Qh2 33.Rf7–+) 33.Kc5 Qe3 (33...Qh2!? 34.Rf3–+) 34.Kb4 Qe7 (better 34...g5 35.Rf3 Qe7 36.Ka5 b6 37.Kb6 Qc7 38.Ka6 Rd6 39.Bc6 Rc6 40.bc6 Qc6 41.Ka5 Qf3 42.Ka4–+) 35.Ka4 Kc7 (35...Qe2 36.Ka5–+) 36.Kb3?? (36.Rf7 Ra8 37.Kb3 Ra3 38.Kb2 Qf7 39.Bf7 Rf3–+) 36...Ra8 (36...Qe3 37.Kb2–+) 37.a4?? (better 37.Rf7 Ra3 38.Kb2 Qf7 39.Bf7–+) 37...Rd8 (better 37...Qe3 38.Kb4–+) 38.Re4?? (38.Rf7 Qf7 39.Bf7=+) 38...Rd7 (38...Qc5 39.g4–+) 39.a5?? (better 39.Re7 Re7 40.a5+=) 39...Qf6 (39...Qc5 40.Re5–+) 40.Re6 White intends b6 (40.b6 Kd8 41.Rf4–+) 40...Qf7 (40...Qd4!? 41.Re8 Qd3 42.Kb4 Qd2 43.Ka4 Qh2 44.Kb4 Qb2 45.Ka4–+) 41.Kb4? (better 41.Rc6 bc6 42.Bf7 Rf7 43.Kb4–+) 41...Qf1 (41...Qf2 42.a6 ba6 43.Ra6–+) 42.b6 (42.b6 Kd8 43.a6 ba6 44.b7 Qb1 45.Kc3–+; 42.Re8 Qb1 43.Kc5 Qg1 44.Kb4 Rd5 45.cd5 Qd4 46.Kb3 Qd5 47.Kb4 Qd4 48.Kb3 Qd3 49.Kb4 b6 50.Re7 Kd6–+) 1–0. BeepBeepImAJeep (2735) – Trader72 (2490), lichess.org, 2020.

4.c4 cb5 5.cb5 Nf6 6.e3 d5 7.a3 b6 8.Nf3 Bb7 (8...Ne4 9.Be2+=) 9.Nc3 e6 10.Na4 Nbd7 11.Nc3 (11.d4!?+–) 11...Bd6= 12.Be2 0–0 13.0–0 Nc5 14.a4 Nfe4 15.d4 Nc3 16.Bc3 Ne4 17.Bb2 f5 18.Ne5 Be5 19.de5 Qg5 20.Bf3 Rac8 21.Rc1 (21.Bd4 Qd8 22.Be4 fe4 23.Qd2+–) 21...h5? (better 21...Rc1!? 22.Bc1 Rc8+–) 22.Qd4+– h4 (22...Nc5 23.a5+–) 23.h3 (23.Qb6 Nd2 24.Qe6 Kh7 25.Bd5 Bd5 26.Qd5 Nf1 27.Rf1 Rfd8+–) 23...Kh7 (23...Nc5 24.a5+–) 24.Ba3 (24.Rc8 Rc8 25.Be4 de4 26.Qb6 Bd5+–) 24...Rg8 (24...Rc1 25.Rc1 (25.Bf8?! Rf1 26.Kf1 Qd8+–; 25.Bc1?! Qd8+–) 25...Rf7 26.Rd1+–) 25.Rfd1 (25.Be4 Rc1 26.Rc1 de4 27.Qb6 Bd5+–) 25...Qh6 (25...Qd8+–) 26.Qb6 Ba8 27.Qa6 Rc1 28.Bc1 (28.Rc1 d4 29.ed4 Nf2 30.Ba8 Nh3 31.Kf1 Qf4 32.Ke2 Qf2 33.Kd1 Nf4+–) 28...g5 29.Be4 fe4 30.Qa7 Kh8 31.Qe7 (31.Ba3 Qh5 32.Rc1 g4+–) 31...g4 32.hg4 Rg4 33.Qf6 Qf6 34.ef6 Kg8 (34...h3 35.Bb2 Rg2 36.Kf1+–) 35.Kh2 Kf7 36.Bb2 Rg6 (36...Rg5 37.Rc1 d4 38.Bd4+–) 37.Bd4 (better 37.Rc1 e5 38.Be5+–) 37...Bb7 (37...Rg5+–) 38.a5 (38.a5 e5 39.Be5+–) 1–0. BeepBeepImAJeep (2560) – bulletmaniac (2140), lichess.org, 2018.

4.c4 d5 5.bc6 Bd7?? (5...bc6 6.Nf3=) 6.Nc3 (better 6.cd7 Qd7 7.cd5 Qd5+–) 6...g5?? (6...bc6 7.Na4 Qa5+=) 7.Qa4 (better 7.c7 Qc8 8.Nd5+–) 7...Ra7?? (7...Ra4 8.cd7 Nd7 9.Na4=) 8.Rd1 (8.cd7 Nd7 9.Qa7 dc4 10.Qb7 Bg7+–) 8...Nh6?? (8...Ra4 9.cd7 Nd7 10.Na4=) 9.Nd5 (better 9.cd7 Nd7 10.Qa7 dc4 11.Qb7 Nf5+–) 9...Ng8?? (9...Ra4 10.c7 Qc8 11.cb8N Qb8 12.Bh8 f6=+) 10.Qa3 (10.cd7 Nd7 11.Qa7 Ngf6+–) 10...Ra8?? (10...Ra3 11.c7 Qc8 12.cb8Q Qb8 13.Ba3 Bg7+=) 11.Bd4 (better 11.cd7 Nd7 12.Nc7 Qc7 13.Qa8 Qd8 14.Qd8 Kd8 15.Bh8 e5+–) 11...bc6?? (better 11...Ra3 12.c7 Qc8 13.cb8Q Qb8 14.Bh8 Ra2=) 12.Qc3 (12.Qa8!? cd5 13.Bh8 Bc6+–) 12...Ra4 (12...cd5 13.Bh8 Ra2+–) 13.c5 (better 13.Bb6 cd5 14.Bd8+–) 13...Bh6?? (13...f6 14.Nb6 Ra2 15.Nf3+–) 14.d3 (better 14.Bh8 cd5 15.Qd3+–) 14...Qc7?? (better 14...f6 15.Nb4 e5+–) 15.Rc1 (better 15.Nc7 Kf8 16.Bh8+–) 15...cd5 16.c6! Ra8?? (16...Qc6 17.Bh8) 17.cd7 Kd7 (17...Qd7 18.Bh8 Ra2+–) 18.Ba7 (18.Qc7 Ke6 19.Qe5 Kd7 20.Qd5 Ke8 21.Rc8). aravind555 – kshatria, lichess.org, 2018.

4.e4 cb5 5.Bb5+= Qc7 (5...Nf6 6.e5 Nd5 7.c4+=) 6.Nf3+/– Nh6 (6...Nf6!? 7.Bf6 gf6+=) 7.Nc3 Ra5 (7...Qf4 8.0–0 e6 9.Na4+–) 8.Ba4+– Rh5 (8...e6 9.0–0+–) 9.0–0 Qd6 (9...e6 10.Nb5 Qf4 11.Re1+–) 10.Qe2 (10.Rb1 Na6+–) 10...Na6 (10...Nc6 11.h3+–) 11.Qc4 (11.Rfb1 b6+–) 11...Nc7?? (better is 11...Rc5 12.Qb3 Ra5+–) 12.Nb5 (12...Rb5 13.Bb5+–; better is 12.e5 Qb6 13.Nd5 Qa5+–) 1–0. Wall,Bill – Kris, Internet, 2005.

4.e4 d6 5.Nf3 =.

3.Bb2 d5=

4.a3 c5 5.e3 Nf6 6.c4 d4 7.ed4 cd4 8.Bd3 g6 (8...e5 9.Qe2 Qe7 10.Bc2=) 9.Bc2 (9.Nf3 Bg7+=) 9...d3 (9...Bg4 10.f3 Be6 11.d3=) 10.Ba4 Bg7 11.h3 (11.Bb3 Qb6 12.Qf3 Qe6 13.Qe3 Qe3 14.de3 0–0+=) 11...0–0 (11...Qb6 12.Nc3 Qe6 13.Kf1 Qc4 14.Bb3=) 12.Nf3 Nbd7 13.Bd4 (13.Bb3!?=) 13...e5=+ 14.Be3 (14.Be5 Re8 A pinning theme) 14...e4–+ 15.Nd4 (15.Nh2 Nd5! 16.Ra2 Ne3 17.fe3 Qh4 18.Kf1–+) 15...Nb6 16.Bb3 Ne8 17.Nc3 Bd4 18.Qc1?! (18.c5 Bc3 19.dc3 Nd5–+) 18...Be3 19.fe3 (19.de3 Qg5 20.Ne4 Qg2–+) 19...Qh4 20.Kf1 Be6 21.Nd1 (21.Qe1 Qe7 22.Ne4 Bc4 23.Bc4 Nc4–+) 21...f5 (21...Bc4 22.Bc4 Nc4 23.Nc3–+) 22.Nf2 (22.Qc3 Nd7 23.Kg1 f4 24.ef4 Qf4–+) 22...Nf6 (better 22...f4 23.Qe1 Bc4 24.Bc4 Nc4 25.Kg1 fe3 26.de3 Ra3 27.Ra3–+) 23.Qc3 Rac8 24.c5 Nbd5 25.Bd5 Bd5 (worse 25...Nd5 26.Qd4 f4 27.Kg1 fe3 28.Nd3 ed2 29.c6 bc6 30.Nc5–+) 26.a4 (26.Qd4 Rcd8 27.Qe5 Nh5–+) 26...Nh5 27.Kg1 Ng3 28.Qe5 (28.Kh2 f4 29.Qe5 Rf5–+ (29...Rc5?! 30.Rhc1 Rfc8 31.Rc5 Rc5 32.Qd6–/+)) 28...Rc5 29.Kh2 Ne2 (better 29...Nh1 30.Nh1 Qf6 31.Qf6 Rf6 32.Ng3–+) 30.g3 (30.Rhf1 Qd8 31.Rfe1 Rc2–+) 30…Ng3 (30...Ng3 31.Qg3 Qg3 32.Kg3 g5–+; better 30...Qd8 31.Rhd1 Rc2–+) 0–1. petrobbo (1985) – sinjoor1 (2115), ChessWorld.net, 2018.

4.a3 c5 5.e3 Nf6 6.c4 d4 (6...Be6 7.Nf3+=) 7.ed4 (7.Nf3 Nbd7 8.Qe2 e6+=) 7...cd4= 8.Nf3 e5 9.Ne5 Bc5 10.Nd3 Be7 (10...Nbd7 11.Be2= (worse 11.Nc5 Nc5 12.Be2 0–0–/+)) 11.Be2 0–0 12.0–0 Bf5 (12...Qb6 13.Nb4+=) 13.Ne1 (13.Re1 Re8 14.Bf1 Nbd7 15.Bd4 Qc7+–) 13...d3 (13...Qb6 14.d3 Nbd7 15.Nd2+–) 14.Bf3 Nbd7 (14...Qc7 15.Nc3 Nbd7 16.Nd5 Nd5 17.Bd5+=) 15.Nc3 (15.Bb7!? Rb8 16.Bc6+–) 15...Nb6 (15...Nc5 16.Nd5=) 16.Bb7+= Ra7 (16...Rb8 17.Bc6 Nc4 18.Na4 Bd7 19.Bf6 Bf6+–) 17.Bc6 (17.Bd5 Bg4 18.Nf3 Nfd5 19.cd5+= (worse 19.Nd5 Nd5 20.cd5 Qd5=)) 17...Nc4= 18.Na4 (18.Bc1 Na5=) 18...Qa5=+ (worse 18...Nb2 19.Nb2 Qc7 20.Ned3 Ra3 21.Ra3 Ba3 22.Qf3+–) 19.Rc1? (better 19.b6 Nb2 20.Qb3=) 19...Qa4–+ 20.b6? (20.Qa4 Ra4 21.Bf6 Bf6 22.b6–+) 20...Qd1 (20...Qc6?! 21.ba7 Nb2 22.Rc6 Nd1 23.Rc7–/+) 21.Rd1 Nb6 (21...Nb2?! 22.ba7 Nd1 23.a8R–/+) 22.Bd4 (22.Bb5 Rd8 (worse 22...Ba3 23.Ra1 Rfa8 24.Bd4–+) 23.Nf3 Ra5–+ (23...Ba3?! 24.Bd4 Nfd5 25.Ra1–+)) 22...Rc7 23.Rc1 (23.Bb5 Nc4–+) 23...Rfc8 (23...Rfc8 24.Bb6 Rc6 25.Rc6 Rc6–+) 0–1. Xiong,Jeffery (2650) – Vachier_Lagrave,Maxime (2795), chess.com Speed 1m+1spm, 2017.

4.a3 Bd7 5.e3 Ra5 6.Nc3 c6 7.Nf3 cb5 (7...Nf6 8.bc6 Nc6 9.Bb5=) 8.Nd5+– Bc6 9.Nb4 g6?? (9...Nf6 10.Rb1+–) 10.Be2 (better 10.Bh8 Nf6 11.Nc6 bc6 12.c4+–) 10...Nf6+– 11.0–0 Bg7 12.Ng5 (12.Nc6 bc6 13.c4 bc4+–) 12...0–0+= 13.f4 Na6 (13...Ra8 14.Rb1+=) 14.c3 (14.Nc6!? bc6 15.Bc3+–) 14...Nb4 15.cb4 Ra6 16.f5 (16.Rc1+=) 16...Ne4 Attacking the backward pawn on d2 (better 16...Qd5!? 17.Bf3 Qd6 (worse 17...Qf5 18.Nh7 Nh7 19.Bc6+–) 18.fg6 fg6 19.Bc6 Rc6=) 17.Bg7+– Kg7 18.Ne4 Be4 19.Rf4 (19.Bb5 Rf6 20.Ba4+– (worse 20.Qa4 Qd2 21.Rf2 Qe3–/+)) 19...Bf5= 20.Bb5 Rf6 (20...Rd6!?=) 21.Ba4 Qd5 (21...e5 22.Rf2+=) 22.Rd4 Qe5 23.Bb3 Be4 (23...Rc8 24.Rc1+–) 24.Qg4 (24.Rc1 Qf5 25.Qe2 e5+–) 24...Qf5 (better 24...Bf5 25.Qf4 Qf4 26.ef4 Rc6+–) 25.Re4?? (better 25.Qf5 Bf5 26.e4+–) 25...Rc8 (25...Qf2 26.Kh1 Qf1 27.Rf1 Rf1) 26.Qf5+– Rf5 (26...gf5 27.Re7 b5 28.Kf2+–) 27.Re7 Rc6 (27...Rd8 28.e4 Rf6 29.Rb7 Rd2 30.Rf1+–) 28.Rb7 Rcf6 (28...Rd6 29.d4 Rdf6 30.e4+–) 29.h3 (29.a4 Rf2 30.Rd7 R2f5+–) 29...h5 (29...Rf2 30.Rd7 R2f5 31.a4+–) 30.Bc2 (30.a4!? Rf2 31.Rd7 R2f5+–) 30...Rf2 31.Rc7 (better 31.Rd1 g5+–) 31...Rd2 32.Rf1 Rf1 (32...Re2 33.e4 Rf1 34.Kf1+–) 33.Kf1 Kh6 (33...Kf8 34.a4+–) 34.Rf7 (better 34.b5 f5 35.a4+–) 34...Rc2 35.Ra7 (35.a4 g5+–) 35...Rc3 (35...Kg5 36.a4+–) 36.Kf2 Kg5 37.g3 (37.a4 Rb3 38.Rb7 Kf5+–) 37...Kf5 38.Kf3 g5 (38...Rc1 39.Ra5 Ke6 40.a4+–) 39.g4 hg4 40.hg4 Kg6 (40...Ke5 41.a4+–) 41.Ra6 Kf7 42.Ra5 (42.a4 Ke7+–) 42...Ke6 (42...Rb3 43.b5+–) 43.a4 Rb3 44.b5 Ra3 (44...Kd6 45.Ra6 Kc7 46.Ke4+–) 45.Ra6 (45.Ra6 Kd5 46.b6+–) 1–0. Akrapovik – jacmos3, lichess.org, 2019.

4.e3 Bd7 5.Nf3+– e6 6.c4 f6 (6...Nf6!?+–) 7.cd5 ed5 8.Be2 (8.Nc3 a3 9.Bc1 c6+–) 8...Be6 (8...Bd6 9.Nc3 a3 10.Bc1+–) 9.Nd4 Bf7 10.0–0 Bd6 (10...Nh6 11.Nc3+–) 11.Nf5 Bf8 12.a3 Qd7 (12...Ne7 13.Nd4+–) 13.Nd4 Nh6 14.Nc3 Bc5 (14...Bd6 15.Na4 0–0 16.f4+–) 15.Na4 Bd4 16.Bd4 Ra4? (better 16...0–0+–) 17.Qa4 0–0 18.Rac1 Be6 19.Ba7 Qd6 (19...Nf5+–) 20.Bc5 Qe5 (20...Qd8 21.Bf8 Kf8+–) 21.d4 Qe4 22.Bf8 Bh3 23.Bf3 Qg6 24.Rc7 Bg2 25.Rg7 (25.Rg7 Qg7 26.Bg7 Bf3 27.Bh6+–) 1–0. DEFFM – GuestNGJT, freechess.org, 2019.

4.e3 Nf6 5.c4 c6 (5...Nbd7 6.cd5 Nd5 7.Nf3=) 6.a3 (6.Nf3 e6+=) 6...Bf5 7.d4 (7.Nf3 Nbd7=) 7...e6 (7...cb5 8.cd5 Qa5 9.Qd2 Nd5 10.Qa5 Ra5 11.Nd2=) 8.Nc3= Qa5 9.Bd3 Bd3 10.Qd3 cb5 11.cb5 Nbd7 12.Nf3 Bd6 13.0–0 0–0 14.Nd2 Qc7 (14...Rfc8 15.e4 Bf4 16.e5 Bd2 17.Qd2+=) 15.h3 (15.Rac1!? Qb6 16.Rc2=) 15...Nb6+= 16.Rfc1 Qe7 17.e4 de4 18.Nce4 Ne4 19.Ne4 Nd5 20.Rc4 Rfd8 21.Rac1 f5 (21...Bf4 22.Re1=) 22.Nc5 Nb6 23.R4c2 Bc5 (23...Nd5 24.Re1 Bc5 25.Rc5+= (worse is 25.dc5 Nb4 26.Qf5 Qd7+=)) 24.Rc5+= Rd7 25.Qg3 Nd5 26.Rc8 Rc8 27.Rc8 Kf7 28.Qf3 Kg6 29.Qg3 Qg5 30.Qe5 Qf6 31.Qg3 Kf7 32.Rc5 f4 33.Qd3 Qg6 34.Qd1 Qf5 (34...Rd8 35.Bc1=) 35.Qa4 f3 36.Qc2 Qg5 (36...fg2!? 37.Qf5 ef5+=) 37.g3+/– b6 38.Rc6 Nf4? (38...g6 39.a4+/–) 39.Qe4 (better is 39.Qh7 Ne2 40.Kh2 Ng3 41.Qd3+/– (41.fg3?? Qd2 42.Kg1 Qg2)) 39...Nh3+/– 40.Kh2 Qh6? 41.Qf3+– Ke7 42.Kg2 Ng5 43.Qg4 Qg6 44.Rb6 h6 45.Bc1 Qf6 46.Be3 Kf7 47.a4 Qe7 48.a5 Rb7 49.Bg5 (49.Bg5 hg5 50.Qf3 Kg6 51.Qb7 Qe8 52.a6 Kh7 53.a7 Qg6 54.a8Q g4 55.Qe4 Qe4 56.Qe4 g6 57.Qe6 Kg7 58.Qf6 Kg8 59.Rb7 g5 60.Qg7) 1–0. Jonsson,Pall G (1800) – Bjarnason,Saevar (2100), Reykjavik ISL, Open, 2014.

3.Bb2 d6

4.a3 Bd7 5.c4 c6 6.e3 cb5 7.cb5 Qb6 8.Nc3 Nf6 9.Na4 Qd8 10.Nc3 e6 11.Nf3 Be7 12.Be2 0–0 13.0–0 d5 14.a4 Bd6 15.d4 e5?? (better 15...Be7+–) 16.de5+– Be5 17.Ne5 Be6 18.Nf3 Qd6 (18...Re8 19.Qd4+–) 19.Nd4 (19.Ba3 Qd8 20.Bf8 Qf8+–) 19...Bd7 (19...Rc8 20.Re1+–) 20.h3 (better 20.Ba3 Qe5 21.Bf8 Kf8+–) 20...Qe5 (20...Rc8 21.Qd3+–) 21.Bf3 Be6 22.Ne6 (22.Qb3!? Qg5 23.e4 Bh3 24.Nd5 Rd8 25.Ne7 Kf8+–) 22...fe6 23.Qb3 Qd6 (23...Qf5 24.Rfe1 Nbd7 25.e4 de4 26.Ne4 Ne4 27.Re4+–) 24.Rfd1 (better 24.Ba3!? Qe5 25.Bf8 Kf8+–) 24...Nbd7 25.Ba3 Nc5 26.Qb4 b6 27.Ne2 (better 27.e4!? Rfc8+–) 27...Qc7 28.Rac1 Rfc8 29.Nd4 Nfe4 (29...Qd7 30.Nc6 Rc6 31.bc6 Qc6 32.Qc3+–) 30.Ne6! Ne6 A pinning theme (30...Qf7 31.Nc5 bc5+–) 31.Rc7 Rc7 (31...Nc7 32.Be4 de4 33.Rd7+–) 32.Be4 de4 33.Qe4 Nc5 34.Qa8 Kf7 35.Qd5 Kg6 (35...Ke7 36.Qe5 Kf7 37.Qc7 Kg6 38.Rd6 Ne6 39.Re6 Kh5 40.Qg7 h6 41.Rh6) 36.Bc5 (36.Qd6 Kf7 37.Qc7 Kg6 38.Rd6 Ne6 39.Re6 Kh5 40.Qg7 h6 41.Rh6) 36...bc5 (36...Rc8 37.Qe6 Kh5 38.Rd5 g5 39.g4 Kh4 40.Qh6) 37.Qd6 (37.Qe6 Kh5 38.Rd5 g5 39.g4 Kh4 40.Qh6) 37...Kh5 (37...Kf7 38.Qc7 Kg6 39.Rd6 Kh5 40.Qg7 c4 41.Qg4) 38.Qc7 (38.Rd5 g5 39.g4 Kh4 40.Qg3) 38...g6 (38...Kh6 39.Qf4 g5 40.Rd6 Kg7 41.Qf6 Kg8 42.Rd8) 39.Qh7 (39.Qg7 h6 40.g4 Kg5 41.Qe7) 39...Kg5 40.Rd6 c4 (40...Kf5 41.Qg6 Ke5 42.Qe6) 41.Qg6 Kh4 42.Qg4 1–0. BeepBeepImAJeep (2585) – cojonudo (1705), lichess.org, 2018.

4.e3 e5 5.c4 Nf6 6.Nf3 (6.d4 Nbd7=) 6...Nbd7 (6...e4 7.Nd4=) 7.a3 Nc5 8.d4 ed4 9.Nd4 (worse is 9.Qd4 Nb3 10.Qf4 Na1 11.Ba1 Be7–/+) 9...Be7 10.Be2 0–0 11.0–0 (11.Nc3 Be6=) 11...Be6 (11...Nfe4 12.f3 Nf6 13.Nc3=) 12.Nd2 Qd7 13.N2f3 (13.Ne6 fe6 14.Bd4 c6+=) 13…h6 (13...h6 14.Ne6 fe6=; 13...Nfe4 14.Rb1=). Morris – Thomason, Colorado, 1986.

4.e3 e5 5.d4 Nd7 6.Nf3 e4 7.Nfd2 Ngf6 8.c4 b6 9.Nc3 (9.a3 Bb7+/–) 9...Bb7 (9...a3 10.Bc1+=) 10.Qc2 (10.a3 Ra7+/–) 10...Qe7 (10...a3!? 11.Bc1 Qe7+/–) 11.Na4+/– g6 12.Nc3 Bg7 13.g3 (13.Be2 0–0+/–) 13...0–0 14.Bg2 Rfe8 15.0–0 d5 (15...Ra7!?+/–) 16.cd5+– Bd5 (16...Nd5 17.Nce4 Rac8+–) 17.Nd5 Nd5 18.Qe4 Qe4 19.Be4 N7f6 20.Bb1 Ra5 21.a4 Nb4 22.Bc3 Nfd5 23.Bb4 Raa8 24.Ba3 Ra4 25.Bd3 Rea8 26.Bb2 Nb4 27.Be4 Ra1 28.Ra1 Ra1 29.Ba1 f5 30.Bb1 Kf7 31.Bc3 Nd5 32.Ba2 Ke6 33.f3 Kd6 34.Bd5 Kd5 35.e4 fe4 36.fe4 Kd6 37.Kf2 c6 38.bc6 Kc6 39.d5 (39...Kd7 40.Bg7+–) 1–0. marandreo (1630) – jocls, internet, 2006.

3.Bb2 e6

4.a3 b6 5.c4.. Schirmer – Gunschmann, 1989.

4.a3 d5 5.e3 c5 6.c4 dc4 7.Bc4 Nd7 8.Nc3 Nb6 9.Be2 Nf6 10.Nf3 Bd6 11.0–0 0–0 12.d4 cd4 13.Nd4 (13.Qd4 Bc7+=) 13...Bc7 (13...e5 14.Nf3=) 14.h3 (14.Qc2 e5 15.Nf5 Be6+=) 14...e5= 15.Nf3 Qe7 16.Qb1 h6 (16...e4 17.Nd2 Bf5 18.Rd1=+) 17.Ne4 Ne4 18.Qe4 Pawn e5, live or die! 18...f5 19.Qb4 (19.Qc2 e4 20.Nd4 Bd6=) 19...Bd6 (better 19...Qb4!? 20.ab4 e4–/+) 20.Qd2 e4 21.Nd4 Qe5 The mate threat is Qh2 22.f4 ef3 23.Nf3 (worse 23.Bf3 Nc4 24.Qc3 Ne3–/+; 23.Rf3?! Qh2 24.Kf2 f4=) 23...Qg3 (23...Qe7!?=) 24.Qd4+= f4?? (better 24...Nd7+=) 25.ef4 (better 25.Qd6!? Bh3 26.Rf2 Rae8+–) 25...Bh3 Do you see the mate threat? 26.Qg7?? (better 26.Rf2 Bf4 27.Qb6+–) 26...Qg7=+ 27.Bg7 Kg7 28.gh3 Rf4 29.Rfd1 Bc5 30.Kg2 (30.Kf1 Rg8 31.Rdc1 Be3 32.Rc7 Kf6–/+) 30...Rg8 (30...Re8 31.Rd2 Re3 32.Rc2 Ra3 33.Ra3 Ba3 34.Rc7 Rf7 35.Rf7 Kf7 36.Ne5 Ke6 37.Nc4 Nc4 38.Bc4 Kd6 39.Bf7–+) 31.Kh2 (31.Rd3 Kf6 32.Kh1 Re8=+) 31...Kf6 (31...Re8!? 32.Kg3 Rf6–+) 32.Rf1–/+ Bd6 33.Kh1 Nd5 (33...Rg3–/+) 34.Nd4?? (better 34.Rad1 Ke6 35.Rfe1+=) 34...Ne3 (34...Rg3!? 35.Bg4 Ra3 36.Rf4 Nf4 37.Ra3 Ba3 38.Ne2 Ne2 39.Be2–+) 35.Rf4–/+ Bf4 36.Nf3 (36.Rg1 Rd8 37.Nf3 Bd6–/+) 36...Rg3–+ 37.Ng1?? (37.h4–+) 37...Ke5 (better 37...Rg2 38.Nf3 Re2–+) 38.Rc1 (38.Bf3 Nc2 39.Ra2 Nd4 40.Bb7 Nb5=+) 38...Ng4 (38...Rg2!? 39.Nf3 Kf6–/+) 39.Rf1=+ Nf6 40.Bf3 b6 41.Bg2? (41.Rd1 Ke6=+) 41...Nh5?? (better 41...Ra3 42.Nf3 Kd6–+) 42.Nf3 Kd6 43.Rd1 Kc5 44.Nd4 (44.Rb1 Rg6 45.Rb4 Rd6–/+) 44...Ra3 45.Ne6 Kb5 (45...Kc4 46.Rd4 Kc3 47.Rf4 Nf4 48.Nf4 Ra1 49.Kh2 a3–+) 46.Rd5?? (better 46.Bf1 Kb4 47.Nf4 Ng3 48.Kg2 Nf1 49.Rf1=) 46...Kc4–+ 47.Rh5 Ra1 48.Bf1 Rf1 49.Kg2 Rc1 (better 49...a3 50.Kf1 a2 51.Nf4 a1Q 52.Ke2 Qb2 53.Kf3 Qf6–+) 50.Nf4–/+ Rc2 51.Kg3 a3 52.Kg4?? (better 52.Rh6 a2 53.Rc6 Kb4 54.Rc2–/+ (54.Rb6?? Ka5 55.Rb8 Rc6–+)) 52...a2–+ 53.Ra5 (53.Rh6 Rb2 54.Rc6 Kb5 55.Rc1–+) 53...ba5 54.Ne6 a1Q 55.Nf4 Qd4 (55...Qd4 56.Kg3 Qg1 57.Kf3 Rf2 58.Ke4 Qg5 59.Ng6 Qd5 60.Ke3 Qf3) 0–1. BeepBeepImAJeep (2595) – NicolaiJorgensen (2505), lichess.org, 2017.

4.c4 a3 5.Bc3 Qg5 6.e3 Nf6 7.Nf3 Qg6 8.Be2 (8.d4 d5+=) 8...Ne4 (8...Qg2 9.Rg1 Qh3 10.Be5=) 9.0–0+= Nc3 10.Nc3 Be7 11.d4 0–0 12.Ne5 Qh6 13.Ne4 (13.Qb3 f6 14.Nd3 f5+=) 13...d6= 14.Nf3 Qg6 15.Ng3 f5 16.d5 e5 17.Qc2 e4 18.Nd4 Bf6 19.Ne6 (better 19.Rad1=) 19...Be6–/+ 20.de6 Re8?? (better 20...Ba1 21.e7 Rc8–/+) 21.Rad1 (better 21.Bh5 Qg5 22.Be8 Ba1 23.Bf7 Kh8 24.Ra1+–) 21...Re6+= 22.c5 Nd7 (22...Be5 23.Bc4 Kh8 24.Be6 Qe6 25.cd6 Bd6 26.f3+–) 23.Bc4 (better 23.cd6 Rd6 24.Qc7+–) 23...Qf7?? (23...Nc5 24.b6 Be7 25.bc7 Kh8 26.Be6 Qe6+–) 24.Be6 (better 24.cd6!? g6 25.dc7+–) 24...Qe6 25.cd6 cd6 26.Qc7 Rd8? (26...Be5 27.f4 ef3 28.Qb7+–) 27.Qd6 (27.Rd6!? Qe8+–) 27...Kf7 (27...Qa2 28.Nf5 Nf8 29.Ne7 Be7 30.Qe7 Rd1 31.Rd1+–) 28.Qc7 Qe5?? (28...g6+–) 29.Rd7 Rd7 (29...Ke6 30.Qe5 Ke5 31.Rfd1 Rd7 32.Rd7+–) 30.Qd7 Kg6 31.Rd1 (31.Rd1 h6 32.Qb7+–) 1–0. BeepBeepImAJeep (2645) – Rafael_Federer (1690), lichess.org, 2017.

4.e3 a3 5.Bd4 Nf6 6.Nf3 d6 7.Be2 e5 8.Bc3 c6 (8...Be7 9.0–0=) 9.0–0 Bd7 10.d4 (10.Qc1 Nd5 11.g3 cb5=) 10...e4= 11.Nfd2 (11.bc6 Bc6 12.Nh4 Bd7=) 11...cb5 (better 11...d5!?–/+) 12.d5= Na6 (12...h5 13.h3=) 13.Na3+= Attacks the backward pawn on b5 13...b4 (13...Nc7 14.Bb2+=) 14.Bf6 Qf6 (14...gf6 15.Nb5 Nc5+–) 15.Nac4+– (15.Ne4 Qe5 16.Nc4 Qe4–/+) 15...Nc5 16.Nb6 Rd8 (16...Ra7!?+–) 17.Nd7+– Nd7 (17...Kd7 18.a3 ba3 19.Ra3+–) 18.Ne4 (18.Rb1 b3 19.Rb3 Qe5+–) 18...Qg6 (18...Qe5 19.Qd3 Nc5 20.Qb5 Ke7+–) 19.Bd3 Qh6 20.Rb1 Nc5 (20...f5 21.Nd2 g6+–) 21.Rb4 Be7 22.Nc5 dc5 23.Bb5 (better 23.Rb7 Qd6 24.Bb5 Kf8+–) 23...Kf8 24.Re4 (24.Rb3 Qd6+–) 24...Bd6 (24...Qd6 25.Qf3+–) 25.g3 g5 (25...Qf6 26.Qb1+–) 26.f4 Qg6 (26...gf4 27.ef4 Rg8+–) 27.Bd3 Qg7 (27...Rg8 28.Re8! Re8 29.Bg6 Rg6 30.fg5 Re3 31.Qg4+–) 28.fg5 h6 (28...b5 29.Bb5 Qg5+–) 29.g6! (29.g6 f6 30.Qg4+–) 1–0. DEFFM – MosesG, freechess.org, 2019.

4.e3 a3 5.Be5 d5 6.c4 dc4 7.Bc4 Qg5 (7...Nd7!? 8.Bg3 Ngf6=) 8.Nf3+= Qg2 (8...Qg4 9.Be2+=) 9.Rg1+– Qh3 10.Bc7 (10.Bg7 Bg7 11.Rg7 Qh6+–) 10...Nf6+= 11.Nc3 Nbd7 12.Rg3 Qh5 13.Rg5 Qh3 14.b6 h6 (14...Qh6!?+=) 15.Bf1+– hg5 (15...Qf1!? 16.Kf1 hg5 17.Ng5 Ra5+–) 16.Bh3+– Rh3 17.Ng5 Rh2?? (better 17...Rh6+–) 18.Bh2 1–0. GuestFJPK – GuestVKDL, freechess.org, 2019.

4.e3 d5 5.Nf3 Nf6 6.a3 c6 7.c4 dc4 (7...cb5 8.cb5 Bd6 9.Nc3=) 8.Bc4 cb5 (8...Bd7 9.Nc3=) 9.Bb5 Bd7 10.Bf6 Qf6 11.Nc3 Increases the pressure on a4 11...Bb5 (11...Bd6 12.Ba4 Ba4 13.Na4+=) 12.Nb5 (12.Nb5 Qd8 13.Qc2+=) 1–0. GuestVMZB – GuestPDML, freechess.org, 2018.

3.Bb2 Nf6

4.a3 d5 5.e3 Nbd7 6.Nf3 e6 7.c4 (7.d4 Bd6=) 7...dc4 8.Bc4 Be7 (8...Bd6 9.d4=) 9.Nc3 (9.d4=) 9...0–0 (9...Nb6!? 10.Be2 0–0=) 10.Na4+– Bd6 11.Nc3 (11.0–0 e5+–) 11...Qe7 (11...Nb6 12.Be2+=) 12.d4 e5 (12...Ba3? 13.Qb3 Bb2 14.Ra8 (14.Qb2?! Ra1 15.Qa1 Qb4=) 14...Bc3 15.Qc3+–) 13.de5 Ne5 14.Ne5 Be5 15.Qb3 Bd7 (15...Rd8 16.0–0+–) 16.h3 (16.0–0 Be6+–) 16...Rfd8 (better 16...Be6+=) 17.0–0–0 (17.0–0!?+–) 17...Bf5 (17...Bd6 18.a4=+) 18.Rd8= Rd8 19.Rd1 Rf8 (19...Rd7 20.Rd7 Nd7 21.g4+=) 20.Nd5 (20.g4 Be6+=) 20...Nd5 21.Rd5 Bb2 22.Kb2 (22.Qb2 Qe4 23.Rc5 b6 24.Rc7 Qg2=) 22...Be6 (22...Be4!? 23.Rd4 Bg2=+) 23.Rd4 (23.Rd2 Bc4 24.Qc4 Ra8=) 23...Qf6 (23...Bc4 24.Qc4 (worse 24.Rc4 Qf6 25.Ka2 Qf2 26.Rc2 Qg1=+) 24...Ra8 25.Rd3+=) 24.Be6 Qf2 (24...fe6 25.f4 c5 26.bc6 bc6+=) 25.Ka1 (25.Qc2!? fe6 26.Qf2 Rf2 27.Kc3 Rg2 28.Rd8 Kf7 29.Rd7 Kf6 30.Rc7=) 25...Qe3?? (better 25...fe6 26.Qe6 Kh8=+) 26.Qe3 (26.Qe3 fe6 27.Qe6 Kh8 28.Qe7+–; 26.Bf7 Kh8 27.Qe3 c5 28.Qe7 h5 29.Qe5 Rf7 30.Rd8 Rf8 31.Rf8 Kh7 32.Qh5) 1–0. FeegLood (2520) – K_Abad (2370), lichess.org, 2015.

4.a3 d5 5.e3 g6 6.Bf6 (6.c4 Bg4 7.Nf3 Bg7=) 6...ef6 7.c4 f5 (7...Be6 8.Qc2=) 8.d4 (8.Nc3 dc4 9.Bc4 Be6 10.Be6 fe6+=) 8...Nd7 (8...f4 9.Nc3 fe3 10.fe3 dc4 11.Bc4+=) 9.cd5+= Nb6 10.Nc3 Nd5 11.Nd5 (11.Na4 f4 12.e4 Nf6+=) 11...Qd5= 12.Nf3 Bd6 13.Nd2 (13.Qc2 Be6=) 13...0–0 (13...f4 14.Qf3 Qf3 15.Nf3 fe3 16.fe3=) 14.Qf3 Qf3 15.Nf3 Re8 (15...f4 16.e4=) 16.Bc4 (16.g3 Be6=) 16...f4 17.Kd2 fe3 18.fe3 Bf5 (18...Be6 19.Be6 Re6 20.g4=) 19.Ng5 Re7 20.Rhf1 Kg7 (20...Rf8!?=) 21.Nf7+= Bh2 (21...Rf7? 22.Bf7 Kf7 23.g4+–) 22.Ng5 (22.Rf2 Bd6+= (22...Rf7? 23.Bf7 Bd6 24.Bc4+–)) 22...Rae8 (22...h6 23.Nf7 Rae8= (worse 23...Rf7 24.Bf7 Kf7 25.g4+–)) 23.Rae1 (better 23.Rh1!? Kf6 24.Rh2 Kg5 25.Re1+=) 23...Bg3 (23...h6 24.e4 hg5 25.ef5 Bf4 26.Kd1 gf5 27.Re7 Re7 28.g3 Bg3 29.Rf5–/+) 24.Re2 h6 (24...Bd6 25.e4 Be4 26.Rf7 Rf7 27.Nf7=+) 25.Nf3= Bd6 26.Ra1 (26.Bd3 Bg4 27.Ra1 c6=) 26...g5 (26...c5!?=+) 27.Bd3= Bg4 28.e4 Bf4 29.Kc3 Bf3 30.gf3 h5 (30...Rd8 31.Rd1=) 31.e5 (31.Bc2 Ra8+=) 31...h4 32.Bf5 (32.Kc4 c6 33.bc6 bc6+=) 32...Rf8 (better 32...c5 33.bc6 bc6=+) 33.Bh3?? (33.Bg4 c5 34.bc6 bc6=) 33...Rd8 (better 33...Be5 34.Re5 Re5 35.de5 Rf3 36.Kb4 Rh3–+) 34.Re4= c6 35.bc6 (35.Kc4 cb5 36.Kb5 Rc7=) 35...bc6=+ 36.Rb1 c5 37.dc5 Re5 38.Re5 (38.Rb7 Kf6 39.Rb6 Kf7 40.Rb7 Kf8 41.Kc4= (worse 41.Ra4 Rc5 42.Kb4 Rd4 43.Kc5 Ra4–/+)) 38...Be5=+ 39.Kc4 Rd4 40.Kb5 Rd3 41.Bg4?? (better 41.Ka4 Rf3 42.Rb3 Rf4 43.Rb4=+) 41...Rb3–+ (41...Ra3?! 42.Rb4=+) 42.Rb3 ab3 0–1. FeegLood (2830) – DannyTheDonkey (2745), lichess.org, 2017.

4.a3 g6 5.c4 Bg7 6.e3 0–0 7.Nc3 d5 8.Na4 dc4 9.Bc4 e6 10.Nf3 Nbd7 11.Nc3 Nb6 12.Be2 c6 13.a4 cb5 14.ab5 Ra1 15.Qa1 Nbd5 16.Nd5 Qd5?? (better 16...ed5 17.0–0 Re8+–) 17.Bf6 Bf6 18.Qf6 Bd7 19.0–0 (19.Ne5 Be8+–) 19...Bb5 20.Bb5 Qb5 21.d4 Qd5 22.Ne5 b5 23.Qe7 h5 (23...Qd8 24.Qb7 Qd5 25.Qd5 ed5+–) 24.Nd7 Kg7 (24...Qa8 25.Nf8 Qf8 26.Qf8 Kf8+–) 25.Qf8 Kh7 26.Nf6 1–0. BeepBeepImAJeep (2585) – Fantasma94 (2140), Lichess Titled Arena, 2018.

4.a3 g6 5.c4 Bg7 6.e3 0–0 7.Nf3 d6 8.Nc3 Nbd7 9.Na4 e5 10.Nc3 e4 11.Nd4 Nc5 12.Be2 Re8 13.0–0 h5 (13...d5 14.d3+–) 14.a4 Bg4 15.Nb3 (better 15.f3!? ef3 16.Bf3+–) 15...Be2= 16.Qe2?? (16.Ne2 Na4 17.Bd4 Ng4+=) 16...Nd3?? (better 16...Nb3 17.Ra3 Nc5–+) 17.Ba3= Ne5 (17...Ng4 18.f3 Bc3 19.dc3 ef3 20.Qf3=+ (20.Qd3 Qh4 21.Bd6 cd6 22.Qd6 Re5 23.Qe5 Ne5 24.gf3 Qc4–+; worse 20.Rf3 Nge5–/+)) 18.Bb2 (18.c5 h4+=) 18...Qd7 (18...Nd3 19.Rab1=) 19.f4 (19.a5 Qf5+–) 19...ef3 (better 19...Nd3!? 20.Rfb1 Qe6=+) 20.gf3+– Qh3 (20...d5 21.cd5 Nd5 22.d4 Nc3 23.Bc3+–) 21.d4 Ned7 22.Rae1 Nb6 (22...Qe6 23.e4+–) 23.a5 Nbd7 24.Qg2 Qe6 25.d5 Qe7 26.Nd4 (better 26.e4!?+–) 26...Ne5 27.Qe2 Nfd7 (27...Ra5 28.e4=) 28.Ra1 (28.Nb3 f5+–) 28...Nc5 (28...Nc4 29.Qc4 Qe3 30.Kh1 A) 30...Bd4? 31.Nd1 (31.Qc7? Nc5–+) 31...Ne5 A1) worse 32.Bd4 Nc4 33.Ne3 Ne3 (33...Re3? 34.Rfc1+–) 34.Be3 Re3–/+; A2) 32.Qd4 Qd4 33.Bd4+–; B) 30...Qd4 31.Qc7 Nc5–/+) 29.a6 (29.Nd1!?+=) 29...ba6 (better 29...Nc4 30.Qc4 Qe3 31.Kh1 Qd4 (31...Bd4? 32.Nd1 Bb2 33.Ne3 Ba1 34.Ra1 Re3 35.Qc1+–) 32.Qd4 Bd4 33.ab7 Rab8–/+) 30.f4? (better 30.Rfd1!?=) 30...Ng4 (30...Nc4 31.Rf3 Bd4 32.Qc4 Be3 33.Kh1 ab5 34.Nb5 Ra1 35.Ba1–+) 31.Nd1? (31.Nc2 Ne3 32.Rae1 Nf1 33.Qe7 Re7 34.Re7 Nd2 35.ba6 Nc4–+) 31...Ne3 Opening the e–file gets Black a lot of play (better 31...Bd4 32.Bd4 Nb3–+) 32.Ne3 Qe3 33.Qe3 Re3 34.ba6 (34.f5 Re4 35.f6 Bh6–/+) 34...Ra6 (better 34...Rd3!? 35.Rfd1 Rd1 36.Rd1 Ra6–+) 35.Ra6–/+ Na6 36.Ba1 (36.f5 Bd4 37.Bd4 Re4–/+) 36...Nc5 (36...Ra3!? 37.Nc2 Ra2 38.Bg7 Rc2–+) 37.Nb5–/+ Ba1 38.Ra1 Rf3 39.Nc7 Rf4 40.Nb5 Ne4 41.Nd6? (better 41.Ra6–/+) 41...Nd6–+ 42.c5 Rd4 (42...Rg4 43.Kf1 Nf5 44.d6–+) 43.cd6 Rd5 44.Ra6 (44.Ra8 Kg7 45.Rd8–+) 44...Kg7 45.Kf2 Kf6 46.Ke3 Ke6 47.Ke4 Rd6 48.Ra7 Kf6 (48...g5 49.Ra5 f6 50.Kf3–+) 49.Ra2 Re6 50.Kf4 Kg7 (50...g5 51.Kg3–+) 51.Kg3 (51.Ra7 Rb6–+) 51...Rf6 (51...g5 52.Ra7–+) 52.Re2 Rf5 53.Rg2?? (53.Kg2 Rd5–+) 53...Kh6 (better 53...Rg5 54.Kf3 Rg2 55.Kg2 g5–+) 54.h4 Re5 55.Rc2 Re4 56.Kh3 (56.Rc7 Rg4 57.Kh3 f5–+) 56...Rg4 57.Rd2 f6 58.Rf2 Kg7 59.Re2 Rd4 (59...g5 60.hg5 fg5 61.Re6–+) 60.Rf2 (60.Re7 Kf8 61.Rh7–+) 60...Kh6 (better 60...g5 61.hg5 fg5 62.Rf5–+) 61.Kh2?? (better 61.Rf6 Kg7 62.Rf3–/+) 61...Rg4 (better 61...Rh4 62.Kg2 Rg4 63.Kh1–+) 62.Kh3 f5 63.Rf3 (63.Rb2 f4–+) 63...g5 64.hg5 Kg5 65.Rd3 h4 66.Rd5 Re4 67.Kh2 (67.Rd3 Re5–+) 67...Kf4 (67...Kg4 68.Rd7 Re2 69.Kg1–+) 68.Rd3 (68.Kh3 Re8–+) 68...Re3 (68...Kg4 69.Rd7 Re2 70.Kg1–+) 69.Rd2 Kf3 (69...Kg4 70.Rg2 Rg3 71.Rd2–+) 70.Rg2 (70.Kh3 Re2 71.Rd3 Kf4–+) 70...Re2 71.Re2 (71.Kh1–+) 71...Ke2 72.Kh3 f4 73.Kh4 f3 74.Kg4 f2 75.Kf5 f1Q 76.Ke6 Qf3 77.Kd7 Qd3 78.Ke7 Ke3 79.Kf7 (79.Ke6 Ke4 80.Ke7 Ke5 81.Kf7 Qh7 82.Ke8 Ke6 83.Kd8 Qd7) 79...Ke4 (79...Qd7 80.Kg6 Ke4 81.Kf6 Qd6 82.Kg7 Kf5 83.Kf7 Qd7 84.Kf8 Kf6 85.Kg8 Qg7) 80.Kf8 (80.Ke7 Ke5 81.Kf7 Qh7 82.Ke8 Ke6 83.Kd8 Qd7) 80...Qd5 (80...Qd7 81.Kg8 Ke5 82.Kf8 Kf6 83.Kg8 Qg7) 81.Ke7 Kf5 82.Kf8 Qd6 (82...Qd7 83.Kg8 Kf6 84.Kf8 Qf7) 83.Ke8 Qc7 84.Kf8 Kf6 85.Ke8 Qg7 (85...Qe7) 86.Kd8 ½–½. BeepBeepImAJeep (2620) – leplusM (2470), lichess.org, 2016.

4.c4 c5 5.e3 b6 (5...d5 6.Nf3=) 6.a3 Bb7 7.Nf3 e6 8.Nc3 Be7 9.Na4 d5 10.Nc3 d4 11.ed4 cd4 12.Nb1 e5 (12...Bc5 13.Ne5=) 13.d3 (better 13.Ne5!? 0–0 14.Qe2+–) 13...Nbd7 14.Be2 0–0 15.0–0 Qc7 (15...Re8 16.Re1+=) 16.Nfd2 (16.Nh4 Bd6+=) 16...Nc5= 17.Nb3 Rad8 18.Nc5 Bc5 19.Nd2 Qd6 (19...Rfe8 20.Re1+=) 20.Bf3 Bc8 21.a4 Qe6 (21...Bb4 22.Ne4 Ne4 23.Be4+– (23.de4?! Be6=)) 22.a5+– Qf5 (22...ba5 23.Nb3 Nd7 24.Na5+–) 23.a6 (better 23.Ne4+–) 23...h5?? (better 23...Qd3 24.Re1 Bb4 25.Re5 Qd2 26.Qd2 Bd2+–) 24.Ne4 (better 24.a7 Be6+–) 24...Ng4 (24...Qg6+–) 25.h3 Nf6 26.a7 Bb7 (26...Bd7+–) 27.Nf6 gf6 (27...Qf6 28.Bb7 Ra8 29.Qh5+–) 28.Bb7 Kh7 (28...Qh7 29.a8Q Ra8 30.Ba8+–) 29.a8Q (better 29.Be4 Qe4 30.Qh5 Kg7 31.de4 Ra8+–) 29...Rg8 30.Be4 Rg6 1–0. BeepBeepImAJeep (2545) – AlphaLeonis (2015), lichess.org, 2017.

4.c4 c6 5.e3 cb5 6.cb5 Qa5 7.Nf3 Qb4?? (7...d5 8.Bc3 Qd8 9.Bf6 ef6 10.Nc3+=) 8.Bc3?? (better 8.Qc2 Nc6 9.bc6 dc6 10.Bd4+–) 8...Qc5 (8...Qg4 9.Bf6 ef6 10.Nc3+–) 9.Be2 a3 10.Qb3 Ne4 (10...e6 11.0–0 d5 12.Bf6 gf6 13.d4+–) 11.Bd4 (better 11.0–0+–) 11...Qd6?? (better 11...Qc1 12.Bd1 d6+=) 12.0–0 (better 12.Qc2!? Nc6 13.Qe4 Nd4 14.Nd4 e6+–) 12...Qe6 13.Bc4 (13.Na3?! Qb3 14.ab3 d5+–) 13...Qf6 (13...Qf5 14.Rc1 d5 15.Bd5 Be6 16.Be6 Qe6 17.Qe6 fe6+–) 14.Bf6 (14.Bf6 gf6 15.Bf7 Kd8 16.Rc1+–) 1–0. GuestRTFM – GuestRDKB, freechess.org, 2018.

4.c4 e6 5.a3 Be7 6.e3 0–0 7.Nc3 b6 8.Na4 Bb7 9.Nc3 d5 10.Nf3 dc4 11.Bc4 c5 12.a4 Nbd7 13.0–0 e5 (13...Bf3!? 14.gf3 Ne5=) 14.d3+– Qc7 15.e4 Rad8 16.Re1 Rfe8? (16...Bd6 17.Qb3+–) 17.Nd2?? (better 17.Qb3!? Rf8 18.Ng5+–) 17...Bf8 (17...Ra8 18.Qb3 Rf8 19.Nf3+–) 18.Nf1 g6 19.Ne3 Bg7 20.Qf3 Nh5?? (better 20...Ra8+–) 21.Bf7+– Kh8 22.Be8 (22.Ncd5 Bd5 23.Nd5 Qd6 24.Be8 Re8+–) 22...Re8 23.Ned5 Qd8 24.a5 Rf8 25.Qd1 Bd5 (25...ba5 26.Qa4+–) 26.Nd5 (worse 26.ed5 ba5 27.Ne4 Nf4+–) 26...Ndf6 (26...ba5 27.Qd2 a4+–) 27.Nb6 Nf4 28.Re3 Ng4 (28...Nd7 29.Nd5 Nd5 30.ed5 Qb8+–) 29.Qg4 Qf6 30.Rf3 g5 (30...Qd8 31.g3 Ne2 32.Kg2+–) 31.Nd5 (better 31.Nd7!? h5 32.Rf4 Qf4 33.Qf4 Rf4+–) 31...Qd6 (31...Qd8 32.Nf4 ef4 33.Bg7 Kg7 34.Qe6+–) 32.Nf4 (better 32.Qg5 Ne2 33.Kh1 Rf3 34.gf3 Nd4+–) 32...ef4 (32...gf4 33.a6+–) 33.Bg7 Kg7 34.Qg5 Kh8 35.a6 Rg8 36.Qd5 (better 36.Qg8! Kg8 37.a7 Qf8+–) 36...Qf6 Threatening mate: Qxa1 37.e5 Qg7 Threatening mate... how? 38.Rf4 h5 39.a7 Qg2 (39...Qg5 40.a8Q Qg6 41.Rf8 Qg7 42.Rg8 Kh7 43.Qe4 Kh6 44.Qac6 Qf6 45.Qf6) 40.Qg2 Rg2 41.Kg2 Kg7 42.a8Q Kg6 (42...h4 43.Qf8 Kg6 44.Ra6 Kg5 45.Qf5) 43.Qe8 (43.Qg8 Kh6 44.Rf6) 43...Kg5 44.Qf7 Kh6 45.Rf6 (45.Ra6 Kg5 46.Qf6) 45...Kg5 46.Rg6 Kh4 47.Qf4 (47.Qf6) 1–0. BeepBeepImAJeep (2560) – Wyzzardz (2095), lichess.org, 2016.

4.c4 g6 5.a3 Bg7 6.e3 0–0 7.Nc3 d5 8.Na4 c6 9.Nf3 e6 (9...cb5!? 10.cb5 Re8+=) 10.Nc3 Nbd7 11.Be2 e5 12.cd5 cd5 13.d4 e4 14.Nd2 Nb6 15.0–0 h5 16.a4 Bg4 17.a5 Be2 18.Qe2 (18.ab6?? Bd1 19.Rfd1 Qb6–+) 18...Nc4 19.Nc4 dc4 20.Qc4 Rc8 (20...Ra5 21.Ra5 Qa5+–) 21.Qb3 Nd7 (21...Ra8 22.a6 Qb8+–) 22.Ne4 Kh8 (22...Rb8+–) 23.Nd6 Rb8 (23...Kg8 24.Nc8 Qc8 25.a6+–) 24.Nf7 Rf7 25.Qf7 Nf6 26.Qg6 Qe8 (26...Qd5 27.b6+–) 27.Qe8 Re8 28.a6 Rc8 (28...ba6 29.ba6 Kg8 30.e4+–) 29.ab7 Rb8 30.Ra8 (30.Ra8 Nd7 31.Rc1+–) 1–0. BeepBeepImAJeep (2525) – posoo (1960), lichess.org, 2018.

4.c4 g6 5.a3 Bg7 6.e3 0–0 7.Nc3 d6 8.Na4 c6 (8...e5 9.d4+=) 9.Nc3 (9.d4 c5+=) 9...Nbd7 (9...e5 10.d4+=) 10.Nf3 e5 11.d4 ed4 12.Nd4 Nc5 (12...c5 13.Nb3 Nb6 14.Be2+=) 13.Be2 (13.bc6 Qb6 14.cb7 Qb2 15.ba8Q Qc3 16.Ke2 Qc4 17.Ke1 Qc3 18.Ke2 Qc4 19.Ke1 Qc3 20.Ke2 Qc4=) 13...Bd7 14.a4 (14.Bf3 Qc7+–) 14...Re8 15.0–0 Qa5 16.Nb3 (16.Bf3 Qb4 17.Qc2 Qc4 18.bc6 bc6+=) 16...Nb3 17.Qb3 Be6 18.Rfd1 Qc7 (18...d5 19.Rac1+–) 19.Rac1 (19.a5 Bg4+–) 19...Nd7 (19...Bg4 20.Qb4 Be2 21.Ne2+–) 20.Bf3 (better 20.Ne4!? Bg4 21.Bg4 Re4 22.Bd7 Qd7 23.Bg7 Kg7 24.Qb4+–) 20...Nc5+= 21.Qc2 (better 21.Qb4!?+=) 21...Bc4=+ 22.Qb1 (22.bc6 bc6 23.Nb5 Bb5 24.ab5 Ra2=+) 22...Bb3 Now all is on a4 (22...d5 23.h3–/+) 23.Re1 (23.Rd2=+) 23...Rec8 (23...Ba4!? 24.Na4 Ra4=+) 24.Ba3 (24.bc6 bc6 25.Nb5 cb5 26.Bg7 Ra4=) 24...Bc3= 25.Rc3 Ba4 26.Bc5 dc5 27.Rc5 (27.b6 Qe7=) 27...Bb5=+ 28.Rec1 (28.Bg4 f5 29.Bf3 Qe7=+) 28...Qe7 29.h3 (29.R5c3 Rd8–/+) 29...Rd8–/+ 30.Rb5 (30.Qb4!? Qf6 31.R5c2–/+) 30...cb5 31.Qb5 Rab8 32.Qb6 Rd6 33.Qa7 Qd8 34.Bb7?? (34.Qa4 Rd2–+) 34...Rd7 (better 34...Rd1 35.Rd1 Qd1 36.Kh2 Qd6 37.g3 Qc7–+) 35.Qb8–/+ Qb8 36.Rc8 Qc8 37.Bc8 Rd1 (37...Rc7 38.Ba6–/+) 38.Kh2 Kf8 39.Bg4 (39.Bb7 Ke7–/+) 39...Rd2 40.Kg3 Ke7 (40...f5 41.Bf3–/+) 41.f4 f5 42.Kf3? (better 42.Bf3–/+) 42...fg4–+ 43.hg4 Ke6 (43...h6 44.e4–+) 44.g5 Kd5 45.g4 (45.g3 Rd3–+) 45...Ra2 46.f5 Ra4 (better 46...gf5!? 47.gf5 Ke5 48.f6–+) 47.f6 Ke5 48.f7 (48.Ke2–+) 48...Ra8 49.e4 Rf8 50.Kg3 (50.Ke3 Rf7 51.Kd3–+) 50...Rf7 51.Kh4 Ke4 52.Kg3 Ke3 (52...Rf3 53.Kg2 Ke3 54.Kg1 Rg3 55.Kh1 Kf3 56.Kh2 Kf2 57.Kh1 Rh3) 53.Kh4 (53.Kg2 Rf3 54.Kg1 Rg3 55.Kh1 Kf3 56.Kh2 Kf2 57.Kh1 Rh3) 53...Kf2 54.Kh3 Kg1 (54...Re7 55.Kh2 Re3 56.Kh1 Rh3) 55.Kg3 Rf2 56.Kh3 Rh2 (56...Rg2 57.Kh4 Kf1 58.Kh3 Kf2 59.Kh4 Rh2) 57.Kg3–+ Kh1 58.Kf3 Rg2 59.Kf4 Kh2 60.Kf3 (60.Ke5 Kg3–+) 60...Kh3 61.Kf4 Rg4 62.Ke5 Rg5 63.Kf6 Rg4 64.Kg7 h5 65.Kf6 h4 66.Kg7 Kg3 67.Kf6 h3 68.Kg7 (68.Ke5 h2 69.Kd5 h1Q 70.Ke5 Qh5 71.Kd6 Rd4 72.Kc6 Qd5 73.Kb6 Rb4 74.Kc7 Rb7 75.Kc8 Qd7) 68...h2 69.Kf7 h1Q 70.Kf6 (70.Ke6 Qc6 71.Kf7 Rf4 72.Ke7 Re4 73.Kf7 Qd7 74.Kg6 Re6 75.Kg5 Qd5) 70...Qe4 71.Kg7 (71.Kf7 Rf4 72.Kg7 Qe5 73.Kg6 Qe6 74.Kg7 Rf7 75.Kh8 Qe8) 71...Rf4 (71...Qe7 72.Kh6 Rh4 73.Kg6 Rg4 74.Kf5 Rg5) 72.Kh6 (72.Kh7 Rf7 73.Kh6 Qf4 74.Kg6 Qf6 75.Kh5 Rh7) 72...g5! 73.Kg7 (73.Kg5 Qe6 Mate attack) 73...Qe7 74.Kh6 (74.Kg6 Kg4 75.Kh6 Rf6) 74...Rf6 (74...Kg4 75.Kg6 Rf6) 75.Kh5 Qh7 76.Kg5 Qf5 (76...Qg6) 0–1. BeepBeepImAJeep (2565) – FeegLood (2750), lichess.org, 2018.

4.e3 d5 5.c4 dc4 6.Bc4 Bf5 7.Nf3 (7.Bf6 ef6 8.Qf3 Bc8+=) 7...Nbd7 (7...e6 8.Nd4 Bg6 9.0–0=) 8.0–0 Nb6 (8...e6 9.d3=) 9.Be2+= Bd3 (9...e6 10.d3+=) 10.Bd4 Be2 11.Qe2 Qd6 (11...e6 12.Bb6 cb6 13.Rc1+=) 12.Be5 Qc5 (12...Qd7 13.Rc1 Rc8 14.Bd4+–) 13.Nc3 (13.d4 Qc4 14.Qc4 Nc4+–) 13...Nfd5 (13...Nbd7!? 14.Bf6 Nf6+–) 14.Nd5 (14.Rfc1 c6 15.bc6 bc6 16.Na4 Qb5 17.Qb5 cb5 18.Nb6 Nb6+–) 14...Nd5 (14...Qd5!? 15.Bc7 Qc4 16.Qc4 Nc4+–) 15.e4+– Nb4 (15...Nf6 16.Rfc1 Qb4 17.Rc7 Qe4 18.Qe4 Ne4 19.Re1+–) 16.Rfc1 Qb6 17.Rc7 (17.a3 c6+–) 17...f6 18.Bg3 e5 (18...h5 19.Qc4 g5 20.h4+– (20.Qb4?! h4 21.Bd6 ed6+–)) 19.Qc4 Be7 20.Re7! Ke7 21.Qb4 Qd6 (21...Kf7 22.d4 ed4 23.Qc4 Qe6 24.Qe6 Ke6 25.Nd4 Kf7 26.Nf5+–) 22.Qd6 Kd6 23.d4 Rhe8 24.de5 fe5 (24...Kc5 25.Rb1+–) 25.Rd1 (25.Rc1 a3+–) 25...Kc5 26.Rd5 Kb4 27.Be5 Red8 (27...Ka3 28.Rd2 Rad8 29.Bd4+–) 28.Bd6 Kc3 29.Kf1 Rac8 30.Ke2 Rc4 (30...Re8 31.Ke3 Kb2 32.Rd2 Kc1+–) 31.Be5 Kb4 32.Rd8 Re4 33.Kd3 Rg4 34.Rd4 (34.Nd4 g6+–) 34...Rd4 35.Nd4 Ka3 (35...g6+–) 36.Bg7 (36.Kc3 Ka2 37.Kc2 g6 38.Ne2 Ka3 39.Bd6 Ka2 40.Nc1 Ka1 41.Be5) 36...Ka2 37.Kc2 h5 (37...h6 38.Ne2 Ka3 39.Bf8 Ka2 40.Nc1 Ka1 41.Bg7) 38.Ne2 h4 (38...Ka3 39.Bf8 Ka2 40.Nc1 Ka1 41.Bg7) 39.Nc1 Ka3 40.Bf8 1–0. DEFFM – SRBVx, freechess.org, 2018.

4.e3 d6 5.Nf3 e5 6.Be2 Be7 7.0–0 0–0 8.c4 Bd7 9.Bd3?? (9.d4 e4 10.Nfd2 c6=) 9...c6?? (9...e4 10.Bc2 ef3 11.Qf3–+) 10.c5?? (better 10.Qc2=+) 10...h6?? (better 10...e4 11.cd6 Bd6–+ (11...ed3?! 12.de7 Qe7 13.bc6 bc6 14.Ne5=)) 11.Nc3 (11.cd6!? Bd6 12.Ne5+=) 11...d5 (better 11...Bg4–/+) 12.Nb1?? (12.Ne5 a3 13.Bc1 Bc5 14.bc6 Nc6 15.Nd7 Qd7=) 12...Re8?? (better 12...e4 13.bc6 bc6–+ (13...ed3?! 14.cd7 Nbd7 15.Bd4=+)) 13.Ne5 Nh5?? (better 13...Bc5 14.a3 Bd6=) 14.Bg6 (14.Qh5 Be6 15.Bd4 Qc7+–) 14...f6?? (better 14...fg6 15.Ng6 Nf6 16.Ne7 Qe7 17.Bf6 Qf6–/+) 15.g3 (15.Nd7 Qd7 16.Qh5 Rf8+–) 15...Kf8?? (15...fe5!? 16.Qh5 Rf8+–) 16.Kh1 (16.Nd7!? Qd7 17.Qh5 Bc5+–) 16...Qa5?? (better 16...fe5 17.Qh5 Bc5 18.Be5 Bg4 19.Bg7 Kg7 20.Qg4 Rf8+–) 17.f4 (better 17.Qh5 Rd8 18.bc6 Bc6 19.Nc6 Nc6+–) 17…Ng3 1–0. onur604 (2320) – kulje (2205), lichess.org, 2020.

4.Nf3 e6 5.e3 a3 6.Bd4 d5 7.c4 dc4 8.Bc4 Nbd7 9.0–0 Be7 (9...Bd6 10.d3=) 10.Qc2 0–0 (10...Bd6 11.e4 e5 12.Bc3+=) 11.e4+= b6 12.e5 Nd5 13.Bd5 ed5 14.e6 (14.Qc6 Ra7 15.Qd5 Bb7=) 14...fe6 15.Qc6 Bb7? (better 15...Rf3 16.Qa8 Rd3=) 16.Qb7+– Ra4 17.Nc3 Rc4 18.d3 Rb4 19.Rfb1 (better 19.Ne2+–) 19...Bf6?? (better 19...Rf3 20.Rb4 Bb4 21.gf3 Qg5 22.Kf1 Qf4+–) 20.Rb4 Bd4 (20...Qe7 21.Rab1 Nc5 22.Qc6 Nd3 23.Nd5 ed5 24.Bf6 Nb4 25.Be7 Nc6 26.Bf8 Kf8 27.bc6+–) 21.Rd4 Nc5 (21...h6 22.Qc6 Nc5 23.Re1+–) 22.Qc6 h6 23.Na4 Rf3 24.gf3 Qf6 25.Nc5 Qd4 (25...bc5 26.Qc5 Qe5 27.Rc1+–) 26.Re1 (better 26.Qe8 Kh7 27.Nd7 Qa1 28.Kg2 Qf6 29.Nf6 gf6 30.Qf7 Kh8+–) 26...bc5 (26...Qf4 27.Ne6 Qf7 28.Qa8 Kh7 29.Nf8 Kg8+–) 27.Qe6 Kh8 (27...Kh7 28.Qf5 g6 29.Re7 Qg7 30.Qf6 Qe7 31.Qe7 Kg8 32.Qc7 d4 33.b6 g5 34.b7 c4 35.b8Q) 28.Qg6 (28.Qg6 Qe4 29.fe4 d4 30.e5 c4 31.e6 c3 32.e7 Kg8 33.e8Q) 1–0. onur604 (2320) – rakillo (2010), lichess.org, 2020.

4.Nf3 e6 5.e3 d5 6.c4 dc4 7.Bc4 Bd6 8.0–0 0–0 9.d4 Nbd7 10.Nbd2 Nb6 11.Bd3 Nbd5 (11...Bd7 12.Ne5+=) 12.a3 Bd7 13.Ne5 Ne8 (13...Qe8 14.Qe2+=) 14.Qe2 f6 15.Nd7 Qd7 16.g3 Kh8 17.e4 Ne7 (17...Nb6 18.Rfd1+=) 18.f4 Rd8 19.Rac1 e5 (better 19...c6!?+–) 20.fe5+– Be5 21.de5 (21.Nf3!? Bd6+–) 21...Qd3+– 22.Qd3 Rd3 23.ef6 gf6 24.Rf2 c6 25.e5 f5 26.Ne4! Kg8 (26...fe4 27.Rf8 Double attack (27.Rf8 Pinning; 27.Rf8 Deflection; 27.Rc4 Decoy)) 27.Nf6 Kf7 28.Nh7 Rg8 29.Nf6 Rh8 (29...Nf6 30.ef6 Nd5 31.bc6+–) 30.bc6 bc6 31.e6! Ke6 32.Re1 Kf7? (32...Kd6 33.Rfe2 Nf6 34.Bf6 Ng6 35.Bh8 Nh8+–) 33.Ng4 Rg3 (33...Kf8 34.Bh8 Ra3+–) 34.hg3 Rg8 (34...Rh3 35.Ne5 Kg8+–) 35.Nh6 (35.Nh6 Kg6 36.Re6 Kh7 37.Nf5 Rg3 38.Ng3 Kg8 39.Re7 c5 40.Re8 Kh7 41.Rf7 Kh6 42.Rg7 c4 43.Rh8) 1–0. onur604 (2285) – opungmaldini (2145), lichess.org, 2020.

4.g3 e6 5.Bg2 Be7 (5...d5 6.Qc1=+) 6.d3 0–0 7.Nd2 d5 8.c4 a3 9.Bc3? (better 9.Be5=+) 9...d4–+ 10.Bd4 Qd4 11.Ngf3 Qd8 12.0–0 b6 13.Ne5 Ra7 14.Nc6 (14.e3 Nfd7 15.Nd7 Nd7–+) 14...Nc6 15.Bc6 Bb7 16.Bb7 Rb7 17.Qb3 Qd6 18.Nf3 c6 19.Rfc1 cb5 20.cb5 (20.Qb5 Rc8–+) 20...Rc7 21.e4 Rfc8 22.Rc7 Qc7 (22...Rc7?! 23.e5 Qd5 24.ef6 Qb3 25.ab3 gf6 26.Nd2–+) 23.Ng5 (23.Rd1 Ng4 24.h3 Ne5–+) 23...Bc5 (better 23...Qe5 24.Rd1 Qg5–+) 24.Rc1 (24.Nf3 e5–+) 24...Qe5 (better 24...Bf2 25.Kg2 Qc1–+) 25.Nf3 Qh5 (better 25...Qb2!? 26.Rc2 Qb3 27.ab3–+) 26.Kg2? (better 26.d4 Ne4 27.dc5 Nc5 28.Qa3–/+) 26...Ng4?? (26...e5 27.Qc3 Re8 28.h3–+) 27.h4?? (27.d4 Nf2 28.dc5 Ne4 (28...Rc5 29.Qa3 g5 30.Rc5 bc5 31.b6+–) 29.cb6 A) 29...Rc1?? 30.b7 h6 31.b8Q Kh7 32.Qe5+– (32.Qa3? Rc2 33.Kg1 Qd5–+); B) 29...Rf8+=) 27...Ne5?? (27...e5!? 28.Qd5 Rf8 29.d4–+) 28.Ne5?? (better 28.d4 Nd7 29.dc5 Rc5 30.Rd1+=) 28...Qe5–+ 29.Qa3?? (29.Qc3 Qc3 30.Rc3 e5–+) 29...g6 (better 29...Ba3 30.Rc8 Bf8–+) 30.Qb3 (30.Qc3 Qc3 31.Rc3 Ra8–+) 30...Qd4 31.Rf1 (31.Rc2 Ra8–+) 31...Ra8 32.Qc2 Ra3 33.Qd2? (33.Rd1–+) 33...Rd3 34.Qf4 e5 35.Qf6 (35.Qg4 f5 36.Qe2 Rd2–+) 35...Qe4 36.Kg1 (36.Kh2–+) 36...Rg3 37.Kh2 Qg2 0–1. JUANKARODA (1810) – Arcotangente (1765), lichess.org, 2020.

4.e3 e6

5.a3 c6 6.c4 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6 6.c4 a4).

5.a3 c6 6.Nf3 d5 =.

5.a3 c6 6.Nf3 d6 7.Be2 c5 8.0–0 (8.c4 Be7 9.Nc3 Qa5 10.0–0 0–0 11.d4 cd4 12.ed4 d5 13.c5+/– 0.75; 8.Nc3 d5 9.d4 c4 10.e4 Be7 11.e5 Nfd7 12.Bc1 0–0 13.0–0= 0.25) 8...Nbd7 (8...Be7 9.c4 Nbd7 10.Nc3 Nb6 11.d4 cd4 12.ed4 Qc7 13.Qd3+= 0.31) 9.c4 e5 (9...Be7 10.Nc3+= Nb6 11.d4 cd4 12.ed4 Qc7 13.Qd3+= 0.31) 10.d4 cd4 (10...Qc7 11.Nc3+= Nb6 12.Rc1 Bg4 13.Nd5+= 0.69) 11.ed4+/– e4 12.Nfd2 d5 13.cd5 (13.Nc3+/– 0.84) 13...Nb6 14.Nc3 (14.Re1 Be7+/–) 14...Nbd5 (14...Bf5 15.Re1 Be7 16.Qb1+/–) 15.Nd5 (15.Nde4 Ne4 16.Ne4 Be7+–) 15...Nd5 (15...Qd5 16.Re1 Be6 17.Bc4+/–) 16.Ne4 f5 (16...Be7 17.Nc5+/–) 17.Nc3 (17.Nc5 b6 18.Re1 Be7+–) 17...Nf4 (17...Nc3!? 18.Bc3 Bd6+/–) 18.Bf3 Be7 (18...Qa5 19.Rc1+–) 19.g3 (19.Re1!? Ra5+–) 19...Nh3 20.Kg2 f4 21.Ne2 (better is 21.Bd5!?+–) 21...0–0+= 22.Qd3 Bf5? 23.Be4?? f3!–+ 24.Kf3 Be4 25.Ke4 Rf2 26.Qc4= Kh8 27.Rf2 Nf2 28.Ke3 Ng4 29.Kd2 Ne5 30.Qc3?? Rc8–+ 31.Qe3?? Nc4 (31...Nc4 32.Kd3 Ne3 33.Ke3 Bg5 34.Nf4 Qd5–+) 0–1. Neumann,Frank (1635) – Rheindt,Stefan (1775), RSS7E easy–95, 2009.

5.a3 d5 6.Nf3 =.

5.Nf3 a3 6.Bd4 d6 =.

3.c4 a3

4.Ba3 h5 5.Nf3 h4 6.d4 h3 7.g3 Nf6 8.Ng5 d6 (8...d5 9.Qc2+=) 9.d5 (9.e4 g6+–) 9...Bf5 10.Bb2 Ne4 (10...e5!?+–) 11.Ne4 (11.Qd3 Ng5 12.Qf5 e6 13.de6 Ne6 14.Bh3 Nd7+–) 11...Be4+– 12.e3?? (12.f3 Bg6+–) 12...Bg2 (better 12...Bh1 13.f4 Nd7–+) 13.Bg2 (13.Rg1!?+–) 13...hg2+= 14.Rg1 Rh2 15.Ke2 (15.Qf3!?+=) 15...Qd7= 16.Nd2 Qg4 17.f3 (17.Ke1!? Qh3 18.Nf3=) 17...Qg3=+ 18.Ne4 Qh4 19.Qe1 Qh3 20.Qf2 (20.Nf2!? Qh5 21.Ng4=+) 20...Nd7–/+ 21.Ng5 Qh5 22.Rg2 Ne5?? (better 22...Rg2 23.Qg2 Nb6=+) 23.Rh2+– Qg5 24.f4 (better 24.Qg2!? Qf5 25.e4+–) 24...Qg4+= 25.Kd2 (25.Kf1!? Nc4 26.Qe2+=) 25...Nf3= 26.Kd3 Qf5 (26...Nh2!? 27.Qh2 g5=) 27.e4+= Qf4 28.Bc1?? (better 28.Rg2+=) 28...Ne5 (better 28...Qh2 29.Qf3 g6–+ (29...Ra2?! 30.Ra2 Qa2 31.Qf5–/+)) 29.Kd4?? (29.Kc3 Qe4 30.Qe2 Qe2 31.Re2=+) 29...Qf2 (better 29...Qh2! 30.Qh2 Nf3 31.Kd3 Nh2–+) 30.Rf2= Ra4 31.Bf4 (31.Rc2 g5=) 31...Rc4=+ 32.Ke3 Ng6 (better 32...Ng4!? 33.Kd3 Re4 34.Ke4 Nf2 35.Kf3 Nd3–/+) 33.Raf1 e5 34.Bg5?? (better 34.Bh2=) 34...f6–+ 35.Bf6 gf6 36.Rf6 Bh6?? (better 36...Nf4!?–+) 37.Kf2 (37.Kf3!? Nh4 38.Kg4 Re4 39.Kh5=) 37...Rc2=+ 38.Kg1? (better 38.Ke1 Rg2 39.R1f2 Rg1 40.Rf1=+) 38...Be3–+ 39.Kh1 Ra2?? (better 39...Nf4–+) 40.Rg6+– c6? (better 40...Bf4+–) 41.bc6 bc6 42.Rd6 (better 42.Rg8 Ke7 43.Rg7 Ke8 44.dc6+–) 42...Bc5?? (better 42...cd5 43.ed5 Bf4+–) 43.Rc6 (43.Rc6 Bf2 44.Re6 Kd7 45.Re5+–) 1–0. anonym1337 – ITHM, lichess.org, 2020.

4.Na3 c6 5.Nf3 (5.Bb2+–) 5...cb5 (5...Nf6!?+–) 6.Nb5+– Ra5 (6...Nf6!?+–) 7.e4 d5? (7...Nc6+–) 8.cd5 Rb5 (8...Bd7 9.Rb1 Nf6+–) 9.Bb5 Nd7 (9...Bd7 10.Rb1 Nf6 11.Qa4+–) 10.Bb2 Qb6 (10...f6 11.Nd4 Kf7 12.Ne6+–) 11.Qa4 e5 12.Rc1 Bc5 13.Ba3 Ne7 14.Bc5 Ng6 15.Bb6 Ke7 16.Qa3 Kf6 (16...Nc5 17.Bc5 Kf6 18.Be7 Ne7 19.Qd6 Be6 20.Qe5 Kg6 21.Qg5) 17.Qd6 1–0. Janek – Vigilante, internet free game, 2017.

3.c4 b6

4.a3 Bb7 5.Bb2 f6 6.e3 g6 7.Nf3 Bg7 8.Be2 Nh6 9.h3 (9.Nc3 0–0+–) 9...Nf7 10.0–0 0–0 11.d4 e5 12.Nc3 ed4 13.Nd4 (13.ed4 Re8+–) 13...f5 14.Na4 d5?? (14...Ng5 15.Kh2+=) 15.Qc2 (15.Ne6 Qd7 16.Ng7 dc4+–) 15...Nd7? (better 15...dc4 16.Rfd1 Bd4 17.Rd4 Qg5+–) 16.Ne6+– Qh4 (16...Qe7 17.Nf8 Nf8 18.Bg7 Kg7 19.Bf3+–) 17.Ng7 dc4 (17...Nd8 18.Kh2 Nf6 19.g3+–) 18.f3 (18.Bc4 Qe4 19.Qe4 fe4+–) 18...c3 19.Bc3 (better 19.Qc3 Ra4 20.Nf5+–) 19...Ra4 (19...Qa4 20.Qa2 Nc5 21.Rfb1+–) 20.Ne6 Rc8 (20...Rfa8 21.Nc7 Rc8 22.Be1+–) 21.Nf4 (21.Rad1 Nf6 22.Bf6 Qf6 23.Qa4 Qe6+–) 21...Rf4 (21...Raa8+–) 22.ef4 Qf4 23.Bd2 (23.Rad1 Nc5+–) 23...Qh4 (23...Qd4 24.Kh1+–) 24.Qb3 Nc5 25.Qa2 (25.Qb4 Qb4 26.Bb4 Nb3+–) 25...Rd8 (25...Qd4 26.Kh1 Bd5 27.Bc3 Qc3 28.Qd5+–) 26.Bb4 Bd5 27.Bc4?? (better 27.Qc2 Ne6 28.Rad1+–) 27...Qc4 (27...Bc4!? 28.Qf2 Qg5 29.f4–+) 28.Qc4 Bc4 29.Rfd1? (better 29.Rfc1 Nb3 30.Rc4 Na1 31.Rc7–+) 29...Nd3 30.a4 (30.Rab1 Ra8–+ (30...Bb5?! 31.Be7 Rd5 32.Rb5 Rb5 33.Rd3–/+)) 30...Nb4 31.Rd8 Nd8 32.Rc1 Be6 33.Rc7 Nd5 (33...h6 34.a5 ba5 35.Ra7–+) 34.Rc1 (34.Ra7 Kf8–+) 34...Nb7 35.Rc6 Kf7 36.Kf2 (36.Kh2 Ke7–+) 36...Na5 (36...Nc5 37.a5 Nd3 38.Kg1–+) 37.Rc1 h5 38.g3 Nb4 39.Rc7 (39.Rd1 Bb3 40.Rd4 Nc4 41.Rd7 Kf8–+) 39...Kf6 40.Rb7 (40.Ke2–+) 40...Nb7 41.Ke3 Nd5 42.Kd4 Nc5 43.Kc4 Na4 0–1. KLINGON09 (1905) – kamali123 (1965), lichess.org, 2019.

4.Nc3+= a3 5.d4 Bb7 (5...Nf6 6.Qb3+=) 6.e4 e6 7.Bd3 Bb4 (7...f5 8.f3+=) 8.Bd2 (8.Nge2 Nf6 9.Rb1 Qe7+/–) 8...Ne7 (8...f5 9.Nge2+=) 9.Nf3 d6 (9...f5 10.ef5 Nf5 11.Rb1+=) 10.0–0 Nd7 (10...0–0 11.Qb3 c5 12.bc6 Nbc6 13.d5+–) 11.Qb3 Bc3 12.Bc3 0–0 13.Bb4 Ng6 14.Rae1 (14.Ba3 Nf4 15.Bc1 Nd3 16.Qd3 f5+/–) 14...e5+= 15.Ba3 (15.de5 Nde5 16.Ne5 Ne5+=) 15...Nf4 (15...ed4!? 16.Nd4 Nge5+=) 16.de5+/– Nc5 (16...Nd3 17.Qd3 Ne5 18.Ne5 de5 19.Qe3+=) 17.Bc5+– bc5 18.ed6 Qd6 19.Bb1 Qg6 20.g3 Nh3 21.Kg2 Nf4 22.Kh1 Ne6 23.Qe3 Ra4 24.Rc1 f5 25.ef5 Qg4 26.Qe6 Kh8 27.Rc3 Bf3 28.Kg1 Be2 29.Rfc1 Rd8 30.Qe7 Qd4 31.Qe2 Rb4 32.Re3 (32...Rf8 33.Re8+–) 1–0. Registration (2380) – KCMO (1850), ICC, 2003.

3.c4 c6

4.a3 cb5 5.cb5 Nf6 6.e3 g6 (6...d5 7.Bb2=) 7.Bb2+= Bg7 8.Nc3 0–0 9.Na4 Qa5 10.Nc3 d5 11.Nf3 Bg4 12.Be2 Nbd7 13.0–0 Nb6 14.a4 (14.Qb3 Rfc8+=) 14...Rfc8 Black gets strong initiative 15.Qb3 e6 16.Rfc1 Nc4 17.Bc4 dc4 18.Qd1 (18.Qc2 Bf3 19.gf3 Qd8=) 18...Ne4=+ 19.h3 (19.Rc2!? Ng5 20.h4 Nf3 21.gf3=+) 19...Bf3–/+ 20.gf3 (20.Qf3? Nd2 21.Qf4 Nb3–+) 20...Nc5 21.Rcb1 Nd3 22.Ra2 Nb2 (22...Rd8 23.Qe2–/+) 23.Rab2 Bc3 24.dc3 Qc3 25.Rc2 Qa3 26.Rbc1 (26.Ra1 Qb3–/+) 26...Qa4 (worse 26...Ra4 27.Qd7 Qc5 28.Qb7=+) 27.b6 Qb5 28.Qd4 Ra4 29.Kg2 Qg5 30.Qg4 Qd5 31.Rc3 Qc6 32.Qd4 Qb6?? (better 32...Qc5–/+) 33.Qb6+– (33.Qb6 Ra6 34.Qb7+–) 1–0. BeepBeepImAJeep (2635) – StiffMaster1 (2405), lichess.org, 2019.

4.a3 cb5 5.cb5 Nh6 6.Nc3+=. Adlai – Podloggy, internet, 2021.

4.Bb2 cb5 5.cb5 b6 6.Nf3+– Bb7 (6...Nf6 7.Bf6 gf6 8.Nc3+–) 7.g3 e6 (7...Nf6 8.Bg2+–) 8.Bd4 Bc5?? (better 8...d5+–) 9.Bg7+– Bf3 (9...Nh6 10.Bh8 (10.Bh6?! Qf6 11.Nc3 Bf3 12.ef3 Qh6+–) 10...f6 11.Qc2+–) 10.ef3 Qg5 (10...Bd4 11.Bd4 Nf6 12.Nc3+–) 11.Bh8 f6 (11...Nf6 12.Nc3+–) 12.Nc3 a3 (12...h5 13.Qc2 Qh6 14.Qe4+–) 13.f4 Qg6 (13...Qf5 14.Qf3 Ra7 15.Be2+–) 14.Bg2 Ra7 (14...Ra5 15.0–0 h5 16.Qf3+–) 15.Ne4 Bd4 (15...d5 16.Nc5 bc5 17.0–0+–) 16.Rc1 Kd8 (16...Ne7 17.Qe2+–) 17.Rc4 Bb2 18.Nd6 Ke7 19.Qb3 Ra5 20.Qb4 Qb1 21.Ke2 Qa2 22.Rc8 (22.Rc8 Qc4 23.Nc4 d6 24.Qd6 Kf7 25.Qf8 Kg6 26.Qg7 Kh5 27.Bf3) 1–0. Janek – Moras, internet free game, 2017.

4.Bb2 d5 5.e3 (5.cd5 cd5 6.Nf3 Nf6=) 5...e6 (5...cb5 6.cb5 Nf6 7.Nf3=) 6.Nf3 (6.Nc3 a3 7.Bc1 dc4 8.Bc4 Bb4=) 6...a3 (better is 6...cb5 7.cb5 Nf6=) 7.Na3 (better is 7.Be5+=) 7...Ba3+– 8.Bg7 Nd7 (8...cb5 9.Bh8 bc4 10.Be5+–) 9.Bh8 Ndf6 10.Bf6 (10.bc6 bc6 11.cd5 ed5+–) 10...Nf6 11.Qc2 (11.bc6 bc6 12.cd5 cd5 13.Bb5 Bd7 14.Bd7 Qd7+–) 11...Qa5 (11...cb5 12.cb5 Ne4 13.Bd3+–) 12.Bd3 Ke7 (12...dc4 13.Qc4 Bd7 14.Qd4+–) 13.bc6 bc6 14.Ne5 (14.cd5 cd5 15.Ne5 Ke8+–) 14...Bb7 (14...Qc7 15.f4+–) 15.Rb1 (15.Bh7 c5+–) 15...Rb8 (15...Bb4+–) 16.Nc6! (16...Bc6 17.Rb8 dc4 18.Bc4+– (< 18.Bh7 Qc7 19.Rh8 Bg2+–)) 1–0. Wall,Bill – Greer,Ken, Palo Alto CA, 1989.

4.Bb2 e6 5.a3 Nh6 6.Nf3 Nf5 7.e4 Nd6 8.Bd3 cb5 9.cb5 b6 10.0–0 Bb7 11.Qe2 f6 12.e5 Bf3?? (better 12...fe5 13.Be5 Ra7+–) 13.Qf3+– (13.gf3?! fe5 14.Qe5 Nf7=) 13...Nf7 (13...Ra5 14.ed6 Bd6 15.Qh5 Ke7+–) 14.ef6 gf6 (14...d5 15.fg7 Bg7 16.Bg7+–) 15.Bf6 Qc7 (15...Be7 16.Be7 Qe7 17.Qa8+–) 16.Bh8 (16.Qa8 Rg8 17.Bh7 Rg4+–) 16...d5 17.Re1 Ng5 (17...Be7 18.Qh5 Nd7 19.Bh7 Nf8+–) 18.Qh5 Nf7 19.Re6 Be7 20.Nc3 d4 21.Nd5 Qb7 22.Nf6 Kf8 23.Bg7! Kg7 (23...Kg7 24.Qh7 Mate attack) 24.Qh7 Kf8 25.Qg8 1–0. Orkide – sfoqts, internet, 2017.

4.Nc3 Qa5 5.Nf3 Nf6 6.e4 d6 7.Bd3 e5 8.0–0 Be7 9.h3 0–0 10.Nh2 Nbd7 11.f4 (11.Ba3!?=) 11...Nc5 12.Qe2 White gets the initiative 12...Nd3 13.Qd3 ef4 (13...Qb6!? 14.Kh1 Qd4–/+) 14.Rf4=+ Nh5 15.Rf3 d5 (15...Qb4!?=) 16.ed5+= Bc5 17.Kh1 Rd8 18.Ne4 White plans d6 18...Be7 19.Bb2 cb5 20.cb5 The passed pawn on d5 quickly leads to threats 20...Bd7 (20...Qc7!?+=) 21.d6+– Bb5? (21...Bh4 22.Qd5 Qb5 23.Qf7 Kh8+–) 22.Qd5+– Be8 23.Qa5 (23.de7?? Rd5 24.Re1 Bc6–+) 23...Ra5 24.de7 Rd7 25.g4 (25.Re1!? Rb5 26.Bc3 Re7 27.Nf6 gf6 28.Re7 Bc6+–) 25...Nf6 (25...Re7 26.Bc3 Ra6+–) 26.Bf6 (26.Bf6 Ra6 27.Nc5 Rf6 28.Rf6 Re7 29.Rd6+–) 1–0. wvmaniac – ctrotter, net–chess.com, 2020.

4.Nc3 e6 5.Na4 Ra4?? (better 5...d5 6.e3 cb5 7.cb5 Nf6+=) 6.Qa4+– Nf6 (6...d5 7.Nf3+–) 7.e3 Ne4 (7...d5 8.d4+–) 8.Nf3 (8.Bb2 cb5 9.Qb5 Nc6+–) 8...Be7 (8...d5 9.Bb2+–) 9.Bb2 Nc5 (9...f6 10.d3 cb5 11.cb5+– (worse 11.Qb5 Nd6 12.Qb3 Na6+–)) 10.Qc2 (better 10.Qa7 Bd6+–) 10...0–0 11.d4 Qb6 (11...Qa5 12.Bc3 Qa4+–) 12.dc5 Qc5 13.a4 (13.Bd4 Qh5+–) 13...g6 (13...d6 14.Be2+–) 14.Ba3 (14.Ba3 Qa3 15.Ra3 Ba3 16.Qc3+–) 1–0. GuestHYVZ – GuestFHXY, freechess.org, 2016.

4.Nc3 e6 5.Na4 cb5 6.cb5 Qa5 7.Nc3 d5 8.e3 Nf6 9.a4 (9.Bb2 Bd6+=) 9...Bd7 (9...e5 10.Nf3 Bb4 11.Bb2+=) 10.Bb2 Bb4 11.Nf3 Ne4 (11...0–0 12.Bd3+=) 12.Qc2 (12.Ne4 de4 13.Ne5 0–0+–) 12...0–0? (12...f5 13.Na2 0–0 14.Nb4 Qb4 15.Bd4+–) 13.Ne5?? (better 13.Ne4 de4 14.Qe4+–) 13...Qc7 (13...Nc3 14.Bc3 Rc8 15.Bb4 Qb4 16.Qd1+=) 14.Nd7 Qd7 (14...Nd7 15.Bd3 Nef6 16.0–0+=) 15.Bd3 (15.Ne4 de4 16.Bg7 Bd2 17.Qd2 Qd2 18.Kd2 Kg7+–) 15...f5 16.0–0 Qf7 (16...Rc8 17.Be4 fe4 18.f3+–) 17.Ne4 fe4 18.Be2 Nd7 19.Qb3 (19.f3!? Rfc8 20.Qd1 ef3 21.Bf3+–) 19...Bd6 (19...Bd2 20.Rad1 Ba5 21.Rc1=) 20.Rac1 (20.a5 Ne5+=) 20...Ne5 (better 20...Nc5!? 21.Qd1 Na4=+) 21.Be5+– Be5 22.Rfd1?? (better 22.f4 Bd6 23.b6+–) 22...Qf2 23.Kh1 Qe2 (23...Qh4 24.g3 Bg3 25.h3 Qh3 26.Kg1 Qh2) 24.d4 (24.Re1 Qd2 25.b6 Rac8–+) 24...Rf2 25.Rg1 Bd6 (better 25...Bh2 26.Qd1 Qe3 27.Kh2 Rf6–+) 26.b6 (26.Qd1 Qe3 27.Qg4–+) 26...Qh5 27.h3 (27.Rc8 Rc8 28.h3 Qh3 29.gh3 Rh2) 27...Raf8 (27...Qh3 28.gh3 Rh2) 28.Qb5 g5 (28...Qh3 29.gh3 Rh2) 29.Qd7 (29.Rgf1 Qh4 30.Rcd1 Qg3 31.Rf2 Qh2) 29...Bg3 (29...Qh3! 30.gh3 Rh2) 30.Qe6–+ R8f7 31.Rc8 (31.Rgf1 Rf1 32.Rf1 Kg7 33.Rf7 Qf7 34.Qf7 Kf7–+) 31...Kg7 32.Qd5 (32.Rcc1–+) 32...g4 (32...Qh3! 33.gh3 Rh2) 33.Qh5+– gh3 34.Qg4 (34.Qg5) 34...Kh6 (34...Kf6 35.Qg3 hg2 36.Kh2 Rd2 37.Qe5 Kg6 38.Rg8 Rg7 39.Rg7 Kh6 40.Qg5) 35.Qg3 (35.Qh3 Kg5 36.Qg3 Kh6 37.Qh4 Kg6 38.Rg8 Rg7 39.Qg3 Kf7 40.Rg7 Kf8 41.Qc7 Rg2 42.Qe7) 35...hg2 (35...R2f5 36.gh3 Kh5 37.Qg6 hg6 38.Rh8 Rh7 39.Rh7) 36.Rg2 Rf1 37.Kh2 R7f3 (37...R1f5 38.Rc5 Rc5 39.dc5 Rf5 40.Qg7 Kh5 41.Qh7) 38.Qh4 (38.Qg5) 1–0. AleksandrNekhoroshik (1750) – alfa_omega (1700), lichess.org, 2020.

4.bc6 bc6 5.Nc3 Ba6 (5...e5 6.Na4 d5 7.e3+=) 6.d3 d5 7.Na4 (7.cd5!? cd5 8.Qa4 Nd7 9.Nd5+=) 7...dc4= 8.dc4 (8.Rb1!? cd3 9.ed3=) 8...Qd1=+ 9.Kd1 Bc4 10.Nb6 (10.Nc3 e5=+) 10...Bb3! 11.Kd2 (11.ab3 Ra1 Pinning (11...Ra1 Deflection)) 11...Ra2 12.Ra2 Ba2 13.Nf3 Bd5 (13...e6 14.Bb2–/+) 14.Bb2 (14.Nd5 cd5 15.e4 e6 16.Bb5 Nd7=) 14...Nf6 15.e3 Bf3 16.gf3 Nbd7 17.Bf6 Nf6 18.Bh3 (18.Bd3!?=+) 18...e6–/+ 19.Ra1 Bb4 20.Kc2 0–0 21.f4 Nd5 (21...Ne4 22.f3 Nf2 23.Bf1–/+) 22.Nd7 Rd8 23.Ne5 Bc3 24.Ra3 (24.Nc6 Rc8 25.Ra6 Be1=) 24...Be5 25.fe5 h6 26.f4 Rb8 27.Ra6?? (27.Bg2 Rb4–/+) 27...Rb6 (better 27...Nb4 28.Kc3 Na6–+) 28.Ra8 (28.Rb6!? Nb6 29.Bg2–/+) 28...Kh7–+ 29.f5? (better 29.Ra3–+) 29...g6 (better 29...Ne3 30.Kd3 Nf5 31.Bf5 ef5–+) 30.fe6= fe6 31.Be6 Ne3 32.Kd3 Nf5 (32...Nf1 33.Ra7 Kh8 34.h3=) 33.Ra7 (33.Bf5 gf5 34.e6 Rb7+–) 33...Kh8 (better 33...Ng7!?=) 34.Bf5+– gf5 35.e6 Rb8 36.e7 (better 36.Kd4 f4 37.Ke5+–) 36...Kg8=+ 37.Rd7 (37.Rc7 Rb3 38.Kd4 Kf7 39.Rc6 Ke7 40.Rh6 f4=) 37...Rb3 38.Kc4 Re3 39.Rd8 Kf7 40.Rh8 Re7 41.Rh6 Re6 42.Rh3 Rf6 43.Kc5 (43.Kd4 Ke6–/+) 43...f4–+ 44.Rf3 Ke7 (44...Kg6 45.Kd4–+) 45.Rf1 (45.Kd4 Rh6 46.Rf4 Rh2=) 45...Kd7 (45...Ke6 46.Kc6 Ke5 47.Kc5–+) 46.Rd1 (better 46.h4 f3 47.h5–/+) 46...Ke7 (46...Ke6 47.Kc6 Ke5 48.Kd7–+) 47.h4 (47.Rf1 Ke6 48.Kc6 Ke5 49.Kd7–+) 47...f3 48.Re1 Kf7 49.h5? (better 49.Rf1!?–+) 49...Kg7 50.Re7 (50.Kd4 Kh6 51.Rf1 Kh5 52.Ke3–+) 50...Kh6 51.Re5 (51.Re1–+) 51…f2 (51...f2 52.Kb6 f1Q 53.Re1 Qb5 54.Kc7 Rf7 55.Re7 Re7 56.Kd6 Rf7 57.Ke6 Qd5) 0–1. anonym1337 – Singhto, lichess.org, 2020.

4.e4 e6 5.a3 (5.Nc3 d5+=) 5...Nf6 (5...d5 6.ed5 ed5 7.cd5 cd5 8.Nf3=) 6.e5 Ne4 7.d4 f6 (7...d5 8.Nd2=) 8.c5 (8.Qh5 g6 9.Qf3 d5 10.ef6 Nf6=) 8...fe5 (8...Qa5 9.Bd2 Nd2 10.Nd2 Be7=) 9.b6 (better 9.Qh5!? g6 10.Qe5+=) 9...Qf6 (better 9...ed4 10.Qh5 g6=+) 10.Nf3? (10.Qh5 g6 11.Qe2 Nf2 12.Qf2 Qf2 13.Kf2 ed4–/+) 10...d5 (better 10...ed4 11.Bb2 Bc5 12.Bd4 Bd4 13.Qd4 Qd4 14.Nd4 e5–+) 11.Qe2?? (better 11.cd6 ed4 12.Bd3 Nd6 13.Bg5=+) 11...ed4–+ 12.Nbd2 (12.Qb2 e5–+) 12...Bc5 (better 12...d3 13.Ne4 Qa1–+) 13.Ne4 de4 14.Bg5?? (14.Qe4 Bb6 15.Bd3–+) 14...ef3 15.Bf6 (15.Qd2 Qe5 16.Kd1 Bb6–+) 15...fe2 16.Be2 (16.Bg7 ef1Q 17.Rf1 Rg8–+) 16...gf6 17.Bh5 (17.Bd3 e5–+) 17...Ke7 18.0–0 (18.Be2 Bb6 19.Bd3 Bc5–+) 18...Bb6 19.Rae1 e5 20.f4 Rf8 (better 20...d3!? 21.Kh1 Ra5 22.Re4–+) 21.fe5 d3 22.Kh1 Be6 23.Rd1 Nd7 24.ef6 Rf6 25.Rfe1 Ba5 26.Re3 Raf8 27.Bf3 Nc5 28.g4 Rf3 (28...Rf3 29.Re5 Rf1 30.Kg2 Rd1 31.Re3 Rd2 32.Kh3 Bc7 33.Kh4 Rh2 34.Rh3 Rh3 35.Kh3 Rf2 36.Kh4 Rh2 37.Kg5 Ne4) 0–1. afsharian – MuradIbragimov, lichess.org, 2018.

4.Nc3 cb5

5.cb5 a3 6.Qb3 e6 7.Nb1 Qa5 8.e3 Be7 9.Nf3 (9.Qc2 Kd8+=) 9...Bf6 (9...Nf6 10.Nd4=) 10.Nc3+= Ne7 11.Rb1 (11.d4+=) 11...Nd5 (better 11...d5!?+=) 12.Nd5+– ed5 13.Qd5 0–0 14.Rb3 d6 (better 14...Qc7 15.Qc4 Qd6+–) 15.Ra3 (15.Ba3? Be6 16.Qe4 Bb3 17.Bd6 Qa2–+) 15...Qa3 (15...Qc7 16.Qc4 Qc4 17.Bc4 Ra3 18.Ba3 Rd8+–) 16.Ba3 Ra3 17.Qd6 Ra2 (17...Ra8 18.Bc4+–) 18.Qb8 Ra1 19.Ke2 Be6 (19...Ra5 20.Qc7 Rb5 21.Nd4+–) 20.Qc7 (20.Qb7 Rd8 21.Qc7 Rc8+–) 20...Rc8 (20...Rb1 21.b6+–) 21.Qb7 Bc4 22.d3 Ra2 23.Nd2 Be6 24.g3 (better 24.d4 h5 25.Kd3 Rcc2+–) 24...g6 (24...Bc3 25.Kf3 Rd2 26.d4+–) 25.Bg2 Rcc2 26.Rd1 Bc3 27.Kf3 (better 27.Bd5!? Bd5 28.Qd5 Bd2+–) 27...Bd2 28.Qb8 Kg7 (28...Rc8 29.Qd6 Rb2 30.Rd2 Rd2 31.b6+–) 29.b6 (29.Qe5 Kh6 30.Qf4 Kg7 31.Qd4 f6+–) 29...h5 (29...Bc3 30.Rf1+–) 30.e4 (better 30.Ra1! Bg4 31.Ke4 Bf5 32.Kf4 Ra1 33.Qe5 f6 34.Qa1+–) 30…Bg4 0–1. AleksandrNekhoroshik (1655) – Amrelshraby (1670), lichess.org, 2020.

5.cb5 Qa5 6.e3 e6 7.Qc2 a3 8.Bd3 (8.Nf3 Bb4 9.Ne5 Qc7+–) 8...d5 (8...d6!?+–) 9.Nd5!+– ed5? (better 9...Nc6 10.bc6 ed5 11.cb7 Bb7+–) 10.Qc8 Ke7 (10...Qd8 11.Qb7 Ra5+–) 11.Nf3 Nd7 12.Qb7 Ngf6 13.Ne5 Rb8 (13...Ke8 14.Nd7 Nd7 15.Qd5 Nf6 16.Qc6 Kd8+–) 14.Nc6 Ke6 15.Nd4 (better 15.Qb8 Nb8 16.Na5+– (16.Nb8?! Qb6 17.Nc6 Bd6+–)) 15...Ke5 (15...Ke7 16.Qc6 Ke8+–) 16.Qc6 g5 (16...Qd2 17.Bd2 Rb5 18.f4) 17.Nf3 1–0. DEFFM – GuestLSQY, freechess.org, 2019.

5.cb5 Nf6 6.Na4 Nd5 7.e3 (7.e4 Nf6 8.Qc2 e6+–) 7...Qa5 (7...e5 8.Bb2 d6 9.e4+–) 8.Nc5+– e5 (8...d6 9.Nb3 Qa4 10.Nf3+=) 9.Nb3 Qb4 10.a3 Nc3?? (better 10...Qa4+–) 11.ab4+– Nd1 12.Ra8 (12.Ra8 Bd6 13.Kd1+–) 1–0. GuestHYVZ – GuestBGYW, freechess.org, 2016.

5.Nb5 a3 (5...Nf6 6.d4=) 6.Qb3 (6.Ba3 Nf6+/–) 6...e6 7.e4 (7.Nf3 Qf6 8.d4 Na6+/–) 7...Nf6+= 8.e5 Ng8 (8...Ng4 9.Qg3 Nh6 10.Ba3+/–) 9.d4 (9.Nf3 Qa5+/–) 9...d5 (9...Nc6 10.c5+/–) 10.Nf3 (10.c5 Nc6+/–) 10...f6 (10...dc4 11.Bc4 Nc6 12.0–0+/–) 11.Bd3 fe5 12.Ne5 Nd7 13.Ng6 hg6= 14.Bg6 Ke7 15.cd5 (15...Qa5 16.Bd2=+; 15.Na3 Kf6 16.cd5 ed5–+; 15.Ba3?! Kf6 16.Bf8 Qf8=). Vitkevicius,Juozas – Cassola,Aldo Guillermo, CiF TT–94–0025B, 1994.

3.c4 d5

4.Ba3 Be6 (4...dc4 5.e3 Nd7 6.Nf3=) 5.Bb4 (5.cd5 Bd5 6.Nc3 Nf6+=) 5...a3 (5...dc4!? 6.Na3 c6–/+) 6.Ba3 (6.c5+=) 6...g5 (better 6...dc4 7.Bb2 c6=+) 7.Bb2+– Nd7?? (7...Nf6 8.Nf3+–) 8.b6 (8.Bh8 dc4 9.Qc2 Ngf6+–) 8...Ra3?? (better 8...Ngf6 9.bc7 Qc7 10.cd5 Bd5+–) 9.Qb3 (9.Na3 Ngf6 10.bc7 Qc7+–) 9...h5?? (better 9...Rb3 10.bc7 Qc7 11.ab3 f6–+) 10.Bf6 (better 10.Na3 Ngf6 11.bc7 Qc7 12.Rc1+–) 10...h4 (better 10...Rb3!? 11.bc7 Qc7 12.Bh8–+) 11.Qe3?? (better 11.Na3 Ngf6 12.bc7 Qc7 13.Rc1+–) 11...Ra7 (better 11...Re3 12.Bh8 Re4–+) 12.Bg5 (better 12.Bh8 Nb6 13.c5+–) 12...Nh6?? (better 12...Nb6 13.c5 Nc4+=) 13.a4 (13.a4 Nb6 A) 14.Bh4? Nf5 (14...dc4?! 15.Qc3 Rh7 16.Ra3=) 15.Qd3 Bg7–+; B) 14.cd5 Bd5 B1) 15.Bh4? Nf5 (15...Ra4? 16.Ra4 Nf5 17.Qe5 Nh4 18.Rg4+–) 16.Qe5 Bg7 (16...Rh4?! 17.Qf5 Rha4 18.Ra4 Ra4 19.e3=) 17.Qf5 Ba1–+ (17...Rh4?! 18.Nc3=); B2) 15.Nc3+=; better 13.bc7 Qc7 14.Qa7+–) 1–0. hamiltonharris (1860) – AL HARRIS (1655), ChessWorld.net, 2017.

4.d3 dc4 5.Nf3 cd3 6.ed3 Qd6 (6...Bg4 7.h3 Bh5 8.Nc3–/+) 7.Be2 (7.Nc3 Nf6=+) 7...Qf6 (better 7...Qb4 8.Bd2 Qb5–/+) 8.Bb2?? (better 8.d4=) 8...Qb2–+ 9.Nbd2 Be6 (9...Qb5!? 10.d4 Qf5 11.Rb1–+) 10.Nd4 0–1. anonym1337 – jeremiahdycus, lichess.org, 2020.

4.cd5 Qd5 5.Nc3 Qc4 =.

4.cd5 Nf6 5.Nc3 Nd5 6.Na4 e5 7.Nc3 =.

4.cd5 Nf6 5.Nc3 Nd5 6.Na4 Bf5 7.Bb2 c6 8.bc6 Nc6 9.Nf3 Ndb4 10.d3 Qa5 (10...e5 A) 11.Ne5? Qa5 12.Nc3 Qe5–+ (12...Ne5?! 13.a3 Nbc6 14.e4–+); B) 11.a3 Nd5 12.Nc3+=) 11.Nc3 e5 12.e4 (12.a3 Nd5 13.Qb3 Nb6+=) 12...Nd4 (12...Be6 13.Qd2 Bg4 14.Be2=) 13.Nd4+= ed4 14.a3 dc3 (14...Nd5! 15.Qa4 Qa4 16.Na4 Ra4 17.ef5 Kd7+=) 15.Bc3+/– Qc7 16.Qd2 Be4 (16...Nd5 17.ed5 f6 18.Be2+=) 17.de4 (17.ab4?! Ra1 18.Ba1 Bd5+=; 17.Bb4?! Bb4 18.Qb4 Bd5+=) 17...Nc6 18.a4 Rd8 19.Qb2 Qf4 20.Be2 Bc5 Threatening mate... how? 21.0–0 0–0 22.Qb7 (22.Bg7?! Rd2 23.Qb7 Nd8=) 22...Rd6 23.Qb5 (23.Qb1 Rb8 24.g3 Bf2 25.Kg2 Rb1 26.gf4 Ra1 27.Ra1 Bd4 28.Bd4 Nd4+–) 23...Nd4 24.Bd4 Bd4 25.Ra3 Rh6 Do you see the mate threat? 26.g3 Bf2+= 27.Kg2 Qe4 28.Bf3 Qe7 29.Rd3 Bc5 30.Rd5 Ba7 31.Re5 Qc7 32.Bd5+/– Rf6 33.Rf6 gf6 34.Re4 Rb8 35.Qe2 Qd7 36.Qg4 Qg4 37.Rg4 Kf8 38.Rh4 Rb2 39.Kf1 Kg7 40.Bf7 Be3 41.Be8 Bg5 42.Rh5 Ra2 43.h4 Be3 44.Rf5 Bb6 (44...Kf8 45.Bb5+/–) ½–½. Lepperoed – Johansen,V, corr Norway, 1983.

4.cd5 Nf6 5.Nc3 Nd5 6.Na4 Bf5 7.d3 e6 8.e4 (8.Bd2!? Qh4 9.Nc3=) 8...Bb4+= 9.Bd2 Bd2 (9...Bd2 10.Kd2 Be4 11.de4 Nf6 12.Kc2 Ra4 (worse is 12...Ne4 13.Qd8 Kd8 14.f3+=) 13.Qd8 Kd8+=).

4.e3 dc4 5.Bc4 c6 6.Qf3 Nf6= 7.Bb2 Bg4 8.Qf4 Nbd7 (8...Bd7 9.Bf6 gf6 10.Nc3=) 9.h3 (9.f3 Bh5=) 9...Bh5 10.Nf3 Bg6 (10...e6 11.0–0=) 11.0–0 e6 12.Na3 (12.bc6 bc6 13.Bd4 Nd5=) 12...Nd5 (12...Nb6 13.bc6 bc6 14.Ne5=) 13.Bd5 (13.Qg3 Nc5=) 13...cd5 14.Rfc1 Be7 (14...f6 15.Qg4 Qb6 16.Rc3=) 15.Bg7 Rg8 16.Bb2 Qb6 17.Bd4 (17.Qc7 Bd6 18.Qb6 Nb6=) 17...Qd6 18.Nc2 (18.Qd6 Bd6 19.Bb2 Ke7=) 18...Qf4 19.ef4 Bd6 (19...Bd3 20.b6=) 20.Ne5 Be4 (20...Ke7 21.Ne3+=) 21.f3 (21.Ne3 f5+=) 21...Be5 (21...Bg6 22.Ne3+=) 22.fe5+– (worse 22.Be5 Bf3 23.Kf2 Be4= (worse 23...Bg2 24.Rg1+–)) 22...Bf3 23.Ne1 Be4 (23...Be2 24.d3+=) 24.Rc7+– b6 25.Rac1 (25.d3 Bf5 26.Kf2+–) 25...Ke7 (25...Rg3!?+–) 26.R1c6+– Rab8? (26...Ke8+–) 27.Bb6 (27.Bf2 Rgd8 28.Bh4 Ke8+–) 27...Ke8 28.Ba7 Rd8 29.Bd4 Rg5 (29...Bb1 30.a3+–) 30.d3 (30.b6 Nb8 31.b7 Rg8+–) 30...Bf5 (30...Ne5 31.Be5 Re5 32.de4 Re4 33.Nf3+–) 31.Kf2 Nb8 (31...h5 32.b6 Bh7 33.b7+–) 32.Rd6 Rd6 (32...h5 33.Bb6 Rd6 34.Rc8 Ke7 35.ed6 (35.Rb8?! Rb6 36.Rb6 Bh7+–) 35...Kd6 36.Bc5 Kd7 37.Rb8+–) 33.ed6 e5 34.Ba7 f6 (34...Bd7+–) 35.Bb8 Be6 (35...e4 36.Re7 Kd8+–) 36.Re7 Kf8 (36...Kd8 37.Bc7 Kc8 38.Re6+–) 37.Re6 (37.Re6 Rg7 38.b6+–) 1–0. Janek – Xxuan, internet, 2017.

4.e3 dc4 5.Bc4 Nd7 6.d4 Nb6 7.Bd3 Nf6 8.Nc3 Bg4 9.f3 Bh5 10.Nge2 e6 11.a3 Be7 12.e4 0–0 13.0–0 Bg6 14.Be3 Nfd7 (14...Bd6 15.Qc1=) 15.Nf4 Bg5 16.Qd2 Nf6 17.e5?? (17.Ng6!? Be3 18.Qe3 fg6 19.Ne2+=) 17...Bd3 (17...Bf4 18.Bg6 A) 18...fg6?! A1) 19.ef6?? Nc4 (19...Qf6?! 20.Ne4 Be3 21.Qe3=) 20.Qd3 Be3 (20...Ne3?! 21.Rfe1–+) 21.Kh1 Qd4–+; A2) 19.Bf4 Nc4 20.Qd3=; B) 18...Nc4–+) 18.Qd3= (18.Nd3?? Nc4 19.Qe1 Be3 (< 19...Ne3 20.ef6 Qd4 21.fg7–+) 20.Kh1 Bd2–+) 18...Bf4 19.Bf4 Nfd5 20.Nd5 Nd5 21.Bd2 Qd7 22.f4 f5 23.Rac1 Rfd8 24.Rfd1 Rac8 25.h3 Nb6 26.Bb4 Qd5 (26...Ra8 27.Bc5=) 27.Rc5 (27.Be7 Rd7 28.Rc5 Qb3=) 27...Qe4 (27...Qd7!?=) 28.Qe4+= fe4 29.g3 (29.Kf2 Kf7+=) 29...e3 30.Kf1 g6 (30...Nd5 31.Rb1+=) 31.Ke2 Nd5 32.Rc4 Rd7 33.Bc5 Rcd8 34.Kd3 b6 35.Bb4 Kf7 36.Rb1 ½–½. Salaske – Husslein, corr SOK–89–45, 1989.

4.e3 dc4 5.Nf3 c6 (5...Be6 6.Qc2=) 6.Nc3 (6.Bc4 cb5 7.Bb5 Bd7+=) 6...Bg4 (6...cb5!? 7.Nb5 Be6=) 7.Bc4+= Nf6 (better 7...e6!?+=) 8.Ne5+– (8.Na4?! Bf3 9.gf3 e6+=) 8...Be6 9.Be6 fe6 10.f4 (10.bc6 Nc6 11.Nc6 bc6 12.Na4 Qd3+–) 10...g6 11.0–0 Bg7 12.Qf3 (12.Na4!? cb5 13.Nc5+–) 12...Nd5+= 13.Ne4 0–0 (13...Nd7 14.Bb2 a3 15.Bd4 cb5 16.Nf7 Kf7 17.Ng5 Kg8 18.Ne6+–) 14.Qh3+– Rf5 (14...Qc8 15.Bb2+–) 15.Ng5 Rg5?? (better 15...h6 16.Ne6 Qd6 17.Ng7 Kg7+–) 16.Qe6 Kh8 17.Nf7 Kg8 18.Nd8 (18.Nd8 Kh8 19.Nf7 Kg8 20.Nh6 Kh8 21.Qg8) 1–0. Adlai – Etc132, internet, 2019.

4.e3 c5 5.cd5 Qd5 6.Nc3 Qf5 7.Na4 Nd7 8.Bb2 b6 9.d4 e6 10.Bd3 Qd5 11.Nc3 Qg2 12.a3 Bb7 13.Nce2 Qh1 0–1. mtre – KINGoftheBOARD, internet, 2002.

4.e3 d4 5.d3 de3 6.Be3 Bf5 7.Nf3 Bg4? (better is 7...Nf6!?+=) 8.Nc3 e6 9.Be2 Bb4 10.Qc2 Nf6 11.h3 Bc3 12.Qc3 Bf5 13.0–0 Nbd7 14.Nh4 Bg6 15.Bf3 Qc8 16.Rae1 0–0 17.Ng6 hg6 18.d4 Rd8 19.Bf4 Nb6 20.Re5 c6? (better is 20...a3+/–) 21.bc6+– bc6 22.Rc5 Nbd5 (22...Qd7 23.Rc6 Rac8 24.Rb6 Qd4 25.Qd4 Rd4 26.Be5 Rdc4 27.Rd1+–) 23.cd5 Nd5 24.Bd5 ed5 25.Rc6 Qf5 26.Qd2 Re8 27.Rfc1 Re4 (27...f6 28.f3+–) 28.Be5 f6 29.f3 Rh4 30.Bd6 Qg5 (30...Re8 31.Rc7+–) 31.Qg5 fg5 32.Be5 Re8 33.Rg6 Re5 (33...Re7+–) 34.de5 Rb4 (34...Kf7 35.Ra6 Rc4 36.Rc4 dc4 37.Ra4 c3+–) 35.Rc7 Rb2 36.Rgg7 Kf8 (36...Kh8 37.e6 Rb1 38.Kh2 Rb2 39.Rgf7 Rb8 40.Rh7 Kg8 41.Rcg7 Kf8 42.Rf7 Kg8 43.e7 d4 44.Rfg7#) 37.e6 Ra2 (37...Rb1 38.Kh2 Rh1 39.Kh1 d4 40.Rgd7 d3 41.Rc8#) 38.Rcf7 Ke8 39.Rg8# 1–0. Janek – morey, internet, 2016.

4.e3 d4 5.Nf3 de3 6.fe3 Bg4 7.Be2 h6 (7...Nd7 8.d4+=) 8.h3 (8.0–0 Nf6+–) 8...Bh5 (8...Bf5 9.0–0+=) 9.Ba3 Nf6 10.Nc3 b6 (10...Nbd7 11.d4+= (worse 11.Na4 Nb6 12.Nb6 Ra3=)) 11.g4 Bg6 12.Ne5 Bd3?? (better 12...Bh7+–) 13.Bd3+– Nbd7 14.Nc6 Qc8 15.0–0 Nc5 (15...e6 16.Bf8 Nf8 17.Na4+–) 16.Bc5 bc5 17.Qf3 e6 18.Ne4 Ne4 (18...Bd6+–) 19.Qf7 1–0. Janek – Nicolas, internet, 2016.

4.e3 e5 5.cd5 Qd5 6.Nc3 =.

4.e3 Nf6

5.d4 c6 6.Nc3 dc4 7.Bc4 e5 8.de5 Qd1 9.Nd1 Bb4 10.Ke2 Ng4 11.f4 Bd7 12.bc6 Bc6 13.Nf3 0–0 14.a3 Ba5 15.Bb2 Nh6 16.Nf2 Nd7 17.Nd4 Nb6 18.Nc6+/– Nc4 19.Na5 Na5 20.g4 Rac8 21.Kf3 Rc2 22.Rab1 Nb3 23.Ne4 Rfc8 24.h3 Kf8 25.f5 Ng8 26.Rhd1 h6 27.Rd7+– R2c7 28.Rbd1 Rd7 29.Rd7 Rb8 30.Nd6 Ne7 31.f6 gf6 32.ef6 Nc6 33.Rf7 Kg8 34.Rg7 Kf8 35.Rh7 Kg8 36.Rh6 b5 37.f7 Kf8 38.Bf6 Ncd4 39.Bd4 (39...Nd4 40.ed4+–; 39.Kf2 b4 40.Rh8#) 1–0. Lohr – Husslein, corr SOK–88–18, 1988.

5.d4 Bf5 6.Nc3 a3 7.Qb3 dc4 8.Bc4 e6 9.Nge2 Nbd7 10.Ng3 (10.f3 Nb6=) 10...Bg6= 11.0–0 Nb6 12.Be2 Be7 13.Bf3 Ra7 14.e4 (14.Nge4!?+=) 14...Qd4+= 15.Bf4 Qd8 16.Rfd1 (16.Rfd1 Nfd7 17.Rac1=). Deneuville,C – Zielinski,P, corr SOK–95–109, 1997.

5.d4 Bf5 6.Nc3 a3 7.Qb3 e6 8.c5 Ne4 (8...Nbd7 9.Ba3 b6 10.Na4+=) 9.Nf3 (9.Ba3 Nd7 10.Ne4 Be4 11.Bb4+=) 9...Nc5 (better is 9...b6 10.c6 Bd6=) 10.dc5+/– Bc5 11.Be2 (11.Nd4 Qf6+/–) 11...Nd7 12.Bd2 (12.Nd4 Bg6+/–) 12...Nb6 (12...Bd6 13.Rc1+/–) 13.Rc1 Bd6 14.0–0 (14.e4 de4 15.Ng5 Be5+/–) 14...0–0 15.Nb1 (15.Nd4 Bg6+/–) 15...Qe7 16.Bc3 f6 (16...e5 17.Nbd2+/–) 17.Nbd2 (17.Bd4 Nd7+/–) 17...Bg6 (17...e5 18.Rfd1+/–) 18.Nh4 Bf7 19.Bd3 (19.Bd4 Rac8+/–) 19...g5 20.Nhf3 e5 (20...e5 21.Qc2 e4 22.Ne4 de4 23.Be4 Bc4 24.Bb7 Rad8+=). Lohr – Husslein, corr (year?).

3.c4 e5

4.a3 c6 5.Bb2 d5 6.cd5 cd5 (6...Qd5 7.Nc3 Qb3 8.Qb3 ab3 9.Nf3+=) 7.Nf3 (7.Be5 Nd7 8.Bg3 Ngf6+=) 7...f6 8.Nc3 (8.d4 e4 9.Nfd2 Bd6=) 8...Be6 (8...d4 9.Na4 Bd7 10.e3=+) 9.Rc1 (9.e3 Qa5=) 9...Qa5 (9...d4 10.Na4 Qa5 11.Nc5 Bc5 12.Rc5=) 10.e4 d4 11.Nd5 Ne7? (better 11...Bd5 12.Rc8 Kf7 13.ed5 g6+=) 12.Nc7+– Kf7? (12...Kd7 13.Na8 Bb3 14.Ne5 fe5 15.Qg4 Be6+–) 13.Ne5! (13.Na8?! Qa8 14.Bc4 Nd7 15.Be6 Ke6+–; 13.Ne6?! Ke6 14.Bc4 Kd7+–) 13...fe5 14.Qf3 Kg8 (14...Kg6 15.Ne6 Nd7 16.Qg4 Kf6+–) 15.Ne6 Nd7 (15...Nf5 16.Qf5 Nc6 17.Ng5 Qd2 18.Kd2 Bb4 19.ab4 Nd8 20.Bc4 Ne6 21.Be6) 16.Ng5 Nf6 (16...Qd2 17.Kd2 Nf6 18.Bc4 Ned5 19.Bd5 Nd5 20.Qf7) 17.Bc4 Ned5 18.Bd5 (18.Bd5 Nd5 19.Qf7) 1–0. Heqexe – Stucer, internet, 2017.

4.a3 c6 5.Bb2 f6 6.e3+= d5 7.Nc3 (7.cd5 Qd5 8.Nc3 Qd8+=) 7...d4= 8.ed4 ed4 9.Ne4 f5 10.Ng3 Nf6 11.Bd3 g6 12.Nf3 c5 13.0–0 Be7 14.Re1 0–0 15.Re2 (15.Bc2 f4 16.Ne4 Ne4 17.Be4 Bf6+=) 15...Bd6 16.Qc2 b6 17.Ng5 Re8 18.Rae1 Re2 19.Be2 h6 20.Nf3 Bb7 21.Nh4 (21.Bc1 Nbd7=) 21...Ne4 22.Nf3 (worse 22.Ng6 Qg5 23.Bf3 Qg6–/+) 22...Nd7 23.Bd1 (23.d3 Ng3 24.fg3 Qf6=) 23...Ndf6 24.d3 Ng3 25.hg3 Qd7 26.Ne5. Guestcello – Jvfz46, internet, 2019.

4.Bb2 d6 5.a3 Be6 6.e3 Nd7 7.d4 ed4 8.ed4 Ngf6 (8...Qe7 9.Qe2=) 9.Nd2 Be7 10.Ngf3 Bg4 11.Be2 0–0 12.h3 Bf3 13.Bf3 Rb8 (13...d5 14.0–0+=) 14.0–0 (14.Qa4 d5+–) 14...c5 (14...Nb6!?+–) 15.Qa4+– cd4 16.Bd4 Nc5 17.Qc2 b6 (17...Ne6 18.Bb2+–) 18.a4 (18.Rfe1 Rc8+–) 18...Ne6 19.Be3 Qc7 (19...d5 20.Rfd1 Rc8 21.Qb2+–) 20.Ne4 (20.Rfe1 d5 21.Qd3 d4 22.Bd4 Rfd8 23.Re6 fe6+–) 20...Ne4 (20...d5 21.Nf6 Bf6 22.Rad1+–) 21.Be4+– g6 (21...h6 22.Rfe1+–) 22.Rac1 Bf6 23.Bc6 Nc5 24.Rfd1 Rfd8 25.Rd5 Be5 (25...Rbc8 26.Rcd1+–) 26.f4 (26.a5 ba5 27.Re5 de5 28.Bc5 Rdc8+–) 26...Bg7 27.Rcd1 Ne6 (27...Nb7 28.Bb7 Rb7 29.Qd3+–) 28.g4 (28.f5 gf5 29.Qf5 Rbc8+–) 28...Qe7 29.Qd2 Nc7 30.Bf2?? (better 30.Rd3+–) 30...Nd5= 31.Qd5 Qe2 (31...Qa7 32.f5=) 32.Re1 (32.Rd2 Qe7+=) 32...Qa2 (32...Qc2 33.f5=) 33.Re7 Rf8 34.Qd1 (better 34.Qd6 Qc4 35.Rf7 Rf7 36.Qb8 Rf8 37.Qb6 Qa4 38.Qe3=+) 34...Qa1?? (better 34...Qc4 35.Qd6 Rbd8–/+) 35.Qa1+– Ba1 36.Bd5 (36.Rd7 Bc3 37.Rd6 Bb4+–) 36...Bf6 (36...Bc3!?+–) 37.Rd7+– Rfd8? (37...Bd8+–) 38.Rd8 (38.Rf7!? Bc3 39.Bb6 Re8+–) 38...Rd8?? (better 38...Bd8 39.g5 h6+–) 39.Bb6+– Rc8 (39...Rb8 40.Bc7 Re8 41.a5+–) 40.a5 Kf8 (40...Bc3 41.a6+–) 41.a6 Ke7 42.a7 1–0. GuestQKPQ – GuestCQTQ, freechess.org, 2017.

4.Bb2 d6 5.Nc3 a3 6.Bc1 Nd7 7.g3 (7.Nf3 Ngf6=) 7...b6 (7...Ngf6!?=+) 8.Bg2+= Ra7 9.e3 Ne7 10.Nge2 Nc5 (10...Nf6 11.d4=) 11.d4 ed4 (11...Bb7 12.0–0 (< 12.dc5 Bg2 13.cb6 cb6=) 12...Bg2 13.Kg2+=) 12.ed4+/– (< 12.Qd4 Nf5 13.Qd2 Be6=) 12...Nb7 13.0–0 g6 (13...Na5 14.Qd3+/–) 14.Qb3 (14.Bg5 Bg4+–) 14...h5 (14...Bg7 15.Re1+/–) 15.Ne4 (15.Bg5 Bh6 16.Bf6 Na5 17.Qa3 Rh7+–) 15...Bg7 16.Bg5 f6? (better is 16...0–0!?+/–) 17.Nf6+– Bf6 18.Bf6 Rf8 (18...0–0 19.Bg5+–) 19.Bg5 Qd7 20.Rae1 Qf5 21.h4 (21.Qe3 Qe6 22.Nf4 Qe3 23.Re3+–) 21...Kf7 (21...Na5 22.Qa3 Be6+–) 22.Nf4 Re8 23.c5 d5 24.Bh3 Na5 25.Qf3 Qc2 26.Bc8 Nc8 27.Qd5 (27…Kg7 28.Re8 Qf2 29.Rf2 Ne7 30.Re7 Kh8 31.Ng6) 1–0. Muller – Peter, SFM, 1991.

4.Bb2 d6 5.d4 ed4 6.Bd4 Nh6=.

4.Bb2 f6 5.Nc3 a3 6.Bc1 b6 (6...Ne7 7.d4=) 7.Nf3 Bb7 (7...Bc5 8.e4=) 8.e3 (8.e4 Bc5=) 8...Nh6 9.Be2 e4 10.Nd4 Bd6 11.0–0 0–0 (11...f5 12.d3=) 12.f3 f5 13.Qb3 Kh8 (13...Rf7 14.Na4=) 14.f4 Qe7 15.Rb1 (15.Nb1 Bc5+=) 15...Bc5 (15...g5 16.fg5 Qg5 17.Nd5=) 16.Nc2+= Rf6 (16...Nf7 17.Na4+=) 17.Nd5 (17.Na4 Bd6+=) 17...Bd5= 18.cd5 Rg6 19.Bh5 Rf6 20.d3 Ng8 21.Be2 Rh6 22.de4 (22.d6 Qh4 (22...Qd6? 23.d4+–) 23.h3 A) 23...Rd6? 24.d4+– (24.Ba3?! Ra3 25.Na3 Be3 26.Kh1 Bf4=); B) 23...Bd6=) 22...fe4 23.Bd2 c6 24.Nd4 Bd4 25.ed4 Nf6? 26.dc6 dc6 27.f5 e3 28.Be3 Rh4 29.Bf3 Ra5? 30.bc6 Rf5 31.Bf2 Rh6 32.Qb6 Nfd7 33.Qc7 Re6 34.Bg4 Rf8 35.Be6 Qe6 36.cd7 Nd7 37.Rb7 1–0. wiking – Giant, internet, 2010.

4.Nc3 a3 5.Nf3+= Bc5 (5...f6 6.e4+=) 6.Ne5+/– Nf6 (6...d6 7.Nf3+/–) 7.d4 Bb4 8.Bd2 (8.Qb3 Bc3 9.Qc3 d6+/–) 8...d6 9.Nd5?? (better is 9.Nd3 Bc3 10.Bc3+/–) 9...Bd2–+ (< 9...de5 10.Bb4 Nd5 11.cd5 Qd5 12.e3=) 10.Qd2 Nd5 (10...de5 11.de5 Nfd7 12.Qf4–+) 11.Nf7–/+ Kf7 12.cd5 Re8 13.Qf4 Kg8–+ 14.0–0–0 Nd7 15.e3 Nf6 16.Bc4 Rf8 17.Qh4 c5 18.dc5–/+ dc5 19.d6 Kh8 20.e4 Qa5 21.e5?? Qc3 22.Kb1 Qb2# 0–1. Breitenstein,Otto – Peter, CiF, 1984.

4.Nc3 Nf6 5.Na4 Bb4 6.Qb3 =.

3.c4 e6

4.a3 c6 5.Nc3 Qa5 (5...d5 6.cd5 ed5 7.e3=) 6.e3 d6 (6...Nf6 7.Nf3=) 7.Qc2 (7.Rb1 Nd7+=) 7...Bd7 (7...Nf6 8.Rb1=) 8.Be2 Nf6 9.Nf3 d5 10.Rb1 dc4 11.Bc4 Be7 12.0–0 0–0 13.Ne5 Be8 (13...cb5 14.Nd7 Nbd7 15.Rb5+=) 14.f4 cb5 15.Bb5 (15.Nb5 Nc6+=) 15...Qc7 (15...Bb5 16.Rb5 Qc7 17.Bb2=) 16.d3 (16.Qb2 Bb5 17.Nb5 Qd8+=) 16...Bb5= 17.Rb5 Rc8 (17...Nd5 18.Nc4=) 18.Nc4+= Nbd7 19.Na4 Nd5 20.Qb3 b7 Ra4 21.Qa4 Nc3 22.Qb3 Nb5 23.Qb5 Nc5 (23...Qc6 24.Qb1+=) 24.Nd2 Qc6= 25.Qc4 b5 26.Qc2 Qd7 27.d4 Na4 28.Qb1 Qd5 29.Bb2 f5 30.Rc1 Rc1 31.Bc1 Qc6= 32.Bb2 Nc3 33.Qd3 Na4 34.Qb3 Nb2 35.Qb2 Kf7 36.Nb1 Qc4 37.Nc3 b4 38.ab4 Bb4 39.Ne2 Be1 40.Kf1 Bb4 41.Kf2 Kg6 42.Ng1 Qb5 43.Qc2 Qd5 44.Nf3 Bd6 45.Nd2 Bb4 46.Nc4 Kf6 47.Ne5 Be7 48.Qa4+– Qd8 49.g4 fg4 50.Qd1 h5 51.h3!+– Qe8 52.hg4 g6 53.gh5 gh5+/– 54.Qg1 Kf5 55.Qg3 Bd8 56.Kf3 Bh4 57.e4 Kf6 58.Qh4 Kg7 59.Qg5 Kh7 60.f5 ef5 61.Qf5 Kg8 62.Qg6 Qg6 63.Ng6 (63...Kf7 64.Nf4+–) 1–0. Pommerel,Wim – Peter, corr CiF, 1989.

4.a3 d5 5.e3 dc4 (5...Nf6 6.d4=) 6.Bc4 Nd7 7.Nf3 (7.d4 Ngf6=) 7...Nb6 8.Be2 Be7 9.Nc3 Nf6 10.Bb2 0–0 11.d4 Nfd5 (11...Qd6 12.0–0=) 12.0–0+= Bd7 13.e4 Nf4 14.Rc1 Ra5 15.Ne5 Ne2 (15...Be8 16.Re1=) 16.Qe2+= Qe8 17.Nd7 Qd7 18.Rfd1 Rd8 19.Rc2 (19.d5 Bd6+= (< 19...ed5 20.Nd5 Nd5 21.Rd5+/–)) 19...Bf6 20.Bc1 (20.Qf3 Bd4 21.Kh1 e5–/+) 20...Qe8 (20...Bd4 21.Bg5 f6 22.Be3=+) 21.Be3 Be7 22.Bf4 Rd7 (22...Ba3? 23.Bc7 Rd6 24.e5+– (24.Bd6?! Bd6 25.Qf3 Qd7+–)) 23.Nb1 Na8 24.Bd2 Ra7 25.Be3 b6 (25...Ra5 26.Rb2+=) 26.Rdc1 h6 27.Qg4 Kh7 28.Rc6 Ra5 29.Qe2 Qf8 30.Bd2 Ra7 31.Qe3 Bf6 32.R1c4 Qd8 33.Bc3 e5 34.d5+– Rd6 35.Bb2 Ra5 36.Nc3 Bg5 37.Qe2 Rc6 38.Rc6 Be7 39.Qc4 Bd6 40.Qd3 Qe7 41.Nd1 Bc5 42.Bc1 f6 43.Ne3 Be3 44.Be3 Kg6 45.Bd2 Ra7 46.Bb4 Qf7 47.Re6 Kh7 48.Re7 Qg8 49.d6 Qb3 50.Qe2 c5 51.bc6 Re7 52.d7 Rf7 53.d8Q Nc7 54.Qdd3 (54...Ne6 55.Qb3 ab3 56.Qb5+–; 54.Qb8 b5+–) 1–0. Pommerel,Wim – Husslein,G, corr SOK–89–45, 1989.

4.a3 Be7 5.Bb2 Bf6 6.d4 d5 7.c5 Ne7 8.e3 0–0 9.Nf3 Nd7 10.Nc3 h6 (10...c6 11.b6+=) 11.Bd3 g6 (11...e5 12.de5 Be5 13.Qc2+/–) 12.0–0 Bg7 13.Bc2 Nf6 14.Ba4 Bd7 15.Bc2 Kh7 16.Ne5 Bc8 17.e4 de4 18.Ne4 Nfd5 19.f4?? (better is 19.Re1+/–) 19...Ne3+= 20.Qe2 Nf1 21.Rf1 Nd5 22.Ng3 Qe8 23.Nh5 Qe7 24.Ng7 Kg7 25.Qf2 Bd7 26.c6 bc6 27.bc6 Bc8 28.g4 (28.Qg3!? Qf6 29.Be4=) 28...Ba6+= 29.Rc1 Bc8 30.Re1 Rb8 31.Be4 (31.Bc1=) 31...Rb2 (better is 31...Nf4 32.Re3 f5 33.Qf4 Rb2 34.gf5 ef5 35.Ng6 A) worse is 35...fe4 36.Nf8 (36.Ne7? Rf4 37.Nc8 Kf6–+) 36...Qf7 37.Qf7 Kf7 38.Nd7+/–; B) 35...Kg6 36.Bf5 Rf5 37.Qf5 Bf5 38.Re7 Rc2–/+) 32.Qb2+= Nf4 33.Qc3 Qh4 34.Re3 (34.Qg3 Qg3 35.hg3 Nh3 36.Kg2 Ng5=) 34...f5 (better is 34...f6 35.Nd3 Qg4 36.Kh1 Nd5 37.Bd5 ed5+=) 35.d5?? (35.gf5 ef5 36.Bf3 Ba6=) 35...Kh7?? (better is 35...fe4!? 36.Nf3 Qf6 37.Qf6 Rf6 38.Re4 ed5 39.Re7 Rf7 40.Re8 Bg4 41.Ne5 Nh3 42.Kg2 Rf2 43.Kg3–+) 36.gf5?? (36.Bf5 Kg8 A) 37.Bg6 Nh3 (37...Ng6?! 38.Qe1 Qf6 39.Ng6 Qg6 40.de6–/+) 38.Kh1 Rf1 39.Kg2 Rf2 40.Kh1 Ng5 41.Bh7 Nh7 42.Nf3 Qg4 43.Qh8 Kh8 44.de6 Qg2; B) 37.Qb4 Nh3 38.Rh3 Qh3 39.Ng6 (39.Be6?? Be6 40.Qf8 Kf8 41.de6 Qe3 42.Kg2 Qe5–+) 39...Qe3 40.Kg2 Qe2 41.Kg3 Qe3 42.Kh4 Qf2 43.Kh3 Qf3 44.Kh4 Qf2 45.Kh3 Qf3 46.Kh4 Qf2=) 36...gf5–+ (36...ef5?! 37.Bf3=) 37.Bd3? (37.Qb4 Rg8 38.Kh1–+) 37...Rg8 (37...ed5?! 38.Rg3 d4 39.Qd2–/+) 38.Rg3 (38.Kh1 Qf2 39.Rg3 Rg3 40.Bf5 ef5 41.Qg3 Qf1 42.Qg1–+) 38...Rg3 39.hg3 Qg3 40.Kf1 Nd3 (better is 40...Ba6! 41.Qc2 Nd3–+) 41.Nd3 Ba6 42.Ke2 f4 (better is 42...Qg2 43.Ke3 Qe4 44.Kd2 Qd5 45.a4–+) 43.Kd2? (43.Qd4 ed5 44.Kd2 Qh2 45.Kc1–+) 43...Qe3 44.Kc2 Qe2 45.Qd2 Bd3 (45...Bd3 46.Kc3 Qd2 47.Kd2 Bf5–+) 0–1. jarvs (1740) – mikebaldini (1710), gameknot.com, 2014.

4.a3 g6 5.Bb2 Nf6 6.Nc3 c6 (6...Bg7 7.Na4 d6 8.c5+=) 7.Na4 Qa5?? (better is 7...cb5 8.cb5 d5+=) 8.Bf6+– cb5 (8...Rg8 9.Nc3 d5+–) 9.Bh8 Qa4 10.Qa4 bc4 (10...ba4 11.e4 d5 12.ed5 ed5+–) 11.Qa8 d5 12.Qb8 Ba3 13.Qc8 Ke7 14.Qc7 Kf8 (14...Ke8 15.Ra3 c3 16.Ra8#) 15.Qd8# 1–0. MT – guest1819, ICC, 2004.

4.a3 h5 5.Bb2 (5.Nf3 Nf6+=) 5...h4 (5...d5 6.Nf3+=) 6.Nf3 h3 (6...Nf6 7.Nc3+=) 7.gh3 (7.Nc3 b6+–) 7...Nf6 8.Nc3 c6 (8...b6 9.Rg1+–) 9.Na4 (9.Qc2 d5+–) 9...cb5 (9...d5 10.cd5 ed5 11.Qc2+–) 10.cb5+– Qa5 (10...d6 11.Rc1 Nbd7 12.Rg1+–) 11.Rc1 Kd8? (11...Nc6 12.bc6 Qa4 13.Qa4 Ra4+–) 12.Qc2 Nc6 13.bc6 Qa4 (13...bc6 14.Nc5+–) 14.cb7 Bb7 15.Qc7 Ke8 16.Qb7 Be7 (16...Rh5 17.Ne5 Qe4 18.Nc6+–) 17.Rg1 g6 (17...Rd8 18.Rg7 Qa8+–) 18.Rc8 Rc8 19.Qc8 Bd8 20.Bf6 (20.Bf6 Qa5 21.Bh8+–) 1–0. Lavendel – Kubbe, internet free game, 2018.

4.Bb2 a3 5.Bc3 Nf6 6.Qb3 Ne4 7.Bb4?? (better is 7.Nf3=) 7...Bb4–+ 8.Qb4 (8.Nc3 Qf6 9.Nf3 Bc3 10.dc3 Qc3 11.Qc3 Nc3–+) 8...Qf6 9.Nc3 (9.f3 Qb2 10.Qb3–+) 9...Qf2 10.Kd1 Qf1 11.Kc2 Qa1 12.Ne4 Qa2 13.Kd3 Qb2 (better is 13...d5 14.Nc3 dc4 15.Qc4 Qc4 16.Kc4–+) 14.Qc5 (14.Qb2 ab2 15.Nc3–+) 14...a2 15.Qc7 Ra3 (better is 15...Na6 16.Nd6 Ke7 17.ba6–+) 16.Nc3 0–0 (better is 16...a1Q 17.Qc8 Ke7 18.Qc5 Kd8 19.Qe5–+) 17.Nf3 Nc6! 18.bc6 a1Q (better is 18...bc6 19.Ke3 Qb4–+) 19.Ra1 Ra1 20.cd7 Bd7! 21.Qd7 Raa8 22.Qe7 (22.Qb5 Rfd8 23.Ke3 Rd2 24.Qb2 Rb2–+) 22...Rad8 23.Ke3 Qb6 (better is 23...Rd2! 24.Nd2 Qc3 25.Kf2 Qd2 26.Qb7 Qf4 27.Kg1 Qe3 28.Kf1–+) 24.Kf4 (24.c5 Qb4–+) 24...Qd6 (better is 24...Rfe8 25.Qh4 e5 26.Kg3–+) 25.Qd6 Rd6 26.Ne4 Rc6 27.Ne5 Ra6 28.d3 Ra2 29.Kf3 f6 30.Nd7 Rd8 (better is 30...Rc8!? 31.Nec5–+) 31.Ndc5 b6 32.Ne6 Re8 33.Nd4 Re5 34.Nc3 Ra8 (34...Rb2 35.Ne4–+) 35.Ncb5 g6 36.Nc7 Rc8 (better is 36...Ra4!?–+) 37.Nd5+= Rd8 38.Nc6 (38.e4!?+=) 38...Rf5–/+ 39.Kg3 Re8?? (39...Rg5 40.Kf3 Rd6 41.e4–/+) 40.e4 (better is 40.Nce7!? Kf7 41.Nf5 gf5 42.Kf3+=) 40...Rg5 41.Kf3 Re6 42.Nd4 Rd6 43.Nb5 Re6 44.Nd4 Rd6 45.Nb5 Rd7?? (better is 45...Rd8=) 46.Nf6+– Kg7 47.Nd7 Rh5 48.h3 Kf7 49.Nb6 Re5 50.Nd5 h5 51.c5 Ke6 (51...Re6 52.Nd6 Kf8+–) 52.c6 Kf7 53.c7 Re8 54.Na7 (54.Nd6 Kg7 55.Ne8 Kg8 56.Nef6 Kf8 57.c8Q Kg7 58.Qd7 Kh6 59.Ng8 Kg5 60.Qe7) 54...Ke6+– 55.c8Q Rc8 56.Nc8 Ke5 57.Ke3 h4 58.Nce7 (better is 58.Nc7 Kf6 59.d4 Kg7+–) 58...g5 59.Ng6 (59.Ng6 Ke6 60.Kf3+–) 1–0. mikebaldini (1675) – redeye105, gameknot.com, 2014.

4.Nc3 d5 =.

4.e3 f5 5.a3 c6 6.Nc3 Qa5 7.Qh5 g6 8.Qh4 Bg7 9.Bb2 Kf7 (9...Bf6 10.Qg3+/–) 10.Nf3+/– h6 (10...cb5 11.cb5 Bf6 12.Qg3+/–) 11.Qg3 g5 12.h4 (12.c5 Ke8+/–) 12...g4+/– 13.Ne5 Ke8 14.Ne4! Ne7 (14...fe4 15.Qg4) 15.Nd6 (better is 15.Nc6!? bc6 16.Bg7 fe4 17.Bh8 cb5 18.cb5 d5+–) 15...Kf8 16.Nc8 Nc8 17.Ng6 Kg8 18.Bg7 (18.Nh8 Bb2 19.Rb1 Bh8=+) 18...Kg7 19.Qe5 Kg6 20.Qh8 Qc7 (20...Nd6 21.h5 Kf7 22.bc6 Nc6 23.Qh6+–) 21.Qg8 Kf6 22.Qf8 Kg6 23.h5 Kh7 24.Qf7 Kh8 25.Qf6 Kg8 26.Qg6 Kf8 27.Qh6 Ke8 1–0. ghost (2565) – Tao_Warrior (2310), ICC, 2003.

4.e3 Nf6 5.d4 =.

3.c4 Nf6

4.a3 d5 5.e3 Bf5 6.Nc3 g6 (6...dc4 7.Qf3 Bc8 8.Bc4=) 7.Na4 (7.d4 Bg7+=) 7...Bg7 (7...dc4 8.Bc4 Be4 9.Nf3+=) 8.Nc3 (8.d4 Nbd7+=) 8...c6 (8...dc4 9.Bc4 Bd3 10.Bd3 Qd3 11.Qe2 Qe2 12.Nge2+/–) 9.Qb3 Nbd7 (9...d4 10.ed4 0–0 11.Nge2+/–) 10.d4 0–0 (10...c5 11.cd5 cd4 12.ed4+=) 11.h3 (11.cd5!? c5 12.Nf3+/–) 11...c5 12.Nf3 cd4 13.Nd4 Nc5 14.Qa2 Nfe4 (14...Be4 15.cd5 Nd5 16.Ne4 Ne4 17.Qc2=) 15.Ne4 (15.Nd5!? e6 16.g4 ed5 17.gf5+=) 15...Be4= 16.Be2 (16.f3 e5 17.Nc2 Nd3 18.Ke2 Nc1 19.Rc1 Bc2 20.Rc2 d4=+) 16...Bg2=+ 17.Rg1 Bh3 18.Rb1 (18.cd5!? e5 19.Nc2=+) 18...Ne4–/+ 19.Bb2?? (better is 19.Rb4–/+) 19...Qa5 (20.Bc3 Qc3 21.Qd2 Qd2#) 0–1. Sulak,E – Lewandowicz,P, corr Poland, 1991.

4.Nc3 a3 5.Qb3 e6 6.Nf3 b6 7.Nd4 (7.e4 Bb7 8.e5 Nh5+=) 7...Bb7 8.Nc2 Ng4 9.h3 (< 9.Na3 Bc5 10.e3 Qf6–/+) 9...Qh4 10.g3 Qf6 11.f3 Bf3 12.Rg1 (better is 12.ef3!? Qf3 A) 13.Na3? Qg3 (13...Qh1?! 14.hg4 Bc5 15.Ne2=+) 14.Ke2 Nf2–+; B) 13.Ba3? Qf2 (13...Qh1?! 14.hg4 Ba3 15.Na3=+; 13...Qg3?! 14.Ke2–+) 14.Kd1 Qf3 15.Ke1 Qg3 (15...Qh1?! 16.hg4 Ba3 17.Na3=+) 16.Ke2 Nf2–+; C) 13.hg4 Qh1 14.d4=) 12...Nh2–/+ 13.Ba3 Ba3 (13...Nf1 A) 14.ef3? Nh2 15.0–0–0 Nf3 (< 15...Qf3 16.Bf8 Rf8 17.Rde1–/+) 16.Bf8 Ng1 (< 16...Kf8 17.Rgf1+/–; 16...Rf8?! 17.Rgf1=) 17.Bg7 Qg7 18.Rg1 Qh6–+; B) 14.Rf1 Ba3 15.Rf3+/– (< 15.ef3 Be7=+; 15.Na3?! Qe7 16.Rf3 Ra3=)) 14.Na3 Qd4 (14...Nf1?! 15.Rf1 (15.ef3? Nh2 16.0–0–0 Nf3–+) 15...Qe7 16.Rf3 Ra3 17.Qb2=) 15.e3 Qd6 16.Nc2? (better is 16.Nab1!?–/+) 16...Nf1–+ 17.Kf1 Qd3?? (better is 17...Qd2 18.e4 f5 19.ef5 0–0–+ (19...ef5?! 20.Re1 Be4 21.Ne4 fe4 22.Re4 Kd8 23.Rg2=)) 18.Ke1 c5 19.bc6 Nc6 20.Nb4 Nb4 21.Qb4 Rc8 22.Rf1 Bg2 23.Rf2 Bh3 24.Qb6 0–0 25.a4 Rc4–/+ 26.Nd1 Qe4 27.Rh2? Bg4 28.Qd6 Ra4 29.Rc1 Bd1 30.Kd1 Ra7 31.Ke2 h6 32.Rf1 Qc4 33.Kf2 Qc7 34.Qd4 f5 35.Rfh1 e5 36.Qd5 Kh7 37.Ke2 Ra5 38.Qb3 d5 39.Qb1 e4 40.Rh3 Rf6 41.Qb4 Qc4 42.Qc4 dc4 43.Rc1 Rc6 44.Rc2 Ra4 45.g4 fg4 46.Rh4 Rg6 47.Kf2 Rg5 48.Kg3 h5 49.Rb2 Rf5 50.Rh1 g6 51.Rb8 Kh6 (52.Rc1 Kg5–+) 0–1. Gedigk – Husslein, corr SOK–88–18, 1989.

4.Nc3 e6 =.

4.Nf3 g6 (4...e6 5.Nc3=) 5.Nc3+= Bg7 6.d4 c6 (6...c5 7.dc5 d6 8.cd6 Qd6 9.Qd6 ed6 10.Ba3+–) 7.Bf4 (7.e4 d5 8.e5 Ne4+=) 7...d5 (7...d6 8.e3=) 8.e3 (8.Bb8 Qa5 9.Rc1 Ne4+=) 8...Bg4 (8...Ne4 9.Ne4 de4 10.Nd2+=) 9.h3 (9.Rc1 0–0+=) 9...Bf3= 10.gf3 (10.Qf3? Qa5 11.e4 Ne4–+) 10...a3 (10...c5 11.Rc1 Qa5 A) worse 12.cd5 Nd5 13.Bb8 Nc3–+ (13...Rb8?! 14.Qa4 Qa4 15.Na4 cd4 16.Bc4=+); B) 12.Qd2 dc4 13.dc5+=) 11.Qb3 Qd7? (better 11...c5 12.dc5 Nbd7+=) 12.bc6+– bc6? (better 12...Qc6 13.cd5 Qc8+–) 13.Bb8 0–0 14.Be5 Nh5 (14...Rfd8 15.Rb1+–) 15.cd5 cd5 (15...Be5 16.de5 Rfb8 17.Qc4 cd5 18.Nd5+–) 16.Qd5 Qf5 17.Bc7 Qc2 18.Qc4 (18.Qb3 Qf5 19.Nd5 Kh8+–) 18...Rfc8 19.Nb5 (19.Nd5 Qc4 20.Bc4 e6 21.Ne7 Kh8 22.Nc8 Rc8+–) 19...Qb2 20.Rd1 Ra5 21.Ba5 Rc4 22.Bc4 e5 (22...Qc2 23.Nc3 Qf5+–) 23.Bc3 (23.Bc3 Qc2 24.de5+–) 1–0. Janek – Russo, internet free game, 2017.

3.c4 g6

4.Bb2 Nf6= 5.a3 Bg7 6.Nc3 0–0 (6...e5 7.Na4 d6 8.Nc3=) 7.Na4 d5 (7...d6 8.Nf3=) 8.e3 (8.cd5 Qd5 9.Nc3 Qd6+=) 8...Be6 (8...Bg4 9.Nf3=) 9.Nc5+= Nbd7 (9...Bc8 10.cd5 b6 11.Nd3+=) 10.Ne6+/– fe6 11.d4 (11.Nf3 Nc5+/–) 11...Nb6 (11...Ne4 12.Nf3+/–) 12.Qb3 Na4 13.Bd3 (13.Nf3 Ne4+/–) 13...c6 (13...e5 14.de5 Nd7 15.Bd4 (15.cd5 Ndc5 16.Qc2 Nd3 17.Qd3 Nb2–+) 15...Ne5 16.Rd1+/– (< 16.cd5 Nd3 17.Qd3 Qd5=+)) 14.Ne2+/– Qa5 (14...c5 15.0–0+/–) 15.Bc3 Nc3 16.Qc3 Qc7 (16...cb5 17.cb5 e5 18.Qa5 Ra5 19.de5+/–) 17.Nf4+– Qd7 18.bc6 bc6 (18...Qc6 19.Rc1+–) 19.0–0 (19.Qc2 Ra5+–) 19...e5 20.Ne2 (20.de5 Ng4 21.cd5 cd5+/–) 20...e4 (20...ed4 21.ed4 (< 21.Nd4 c5=+; 21.Qd4?? Ne4–+) 21...c5 A) < 22.dc5 Ng4 23.Qb3 Qc7–/+ (< 23...Ba1 24.Ra1 Qc7 25.Ng3–+); B) 22.Rae1+/–) 21.Bc2+= Qg4 22.Ng3 h5 23.h3 Qg5 24.Ne2 e5 25.a4 h4 26.Ra2 Nh5 27.cd5 cd5 28.Qc6 ed4 29.ed4 Kh7 30.Qc3 Rf3= 31.Qc6 Raf8 32.Be4?? de4–/+ 33.Qe4 R3f7 34.a5= Ng3 35.Ng3 hg3 36.f3 Rf4 37.Qb7 R8f7 38.Qb8 Bd4 39.Kh1 Qf5 40.Qb3?? Rh4–+ (41.Qc2 Rh3 42.gh3 Qh3 43.Qh2 gh2 44.Rh2 Qh2 45.Kh2 Ra7–+) 0–1. Zhukov,Yury – Bondarev,Boris (2085), Ch South Region (open), 2005.

4.Bb2 Nf6 5.a3 Bg7 6.e3 b6 7.Nf3 Bb7 8.Be2 0–0 9.0–0 d6 10.d3 Nbd7 11.d4 e5 12.Nc3 e4 13.Nd2 Re8 14.Na4 Kh8 15.Nc3 Ng8 16.a4 f5 17.Nb3 Qg5 18.Nd5 Bd5 19.cd5 Rf8 20.a5 ba5 21.Ra5 Ra5 22.Na5 f4 23.ef4 Rf4 24.Bc1 Bd4 25.Qd4 1–0. mtr – nogood10, Caissa's Web, 2001.

4.Bb2 Nf6 5.Nc3 a3 6.Bc1 d5 7.Nd5 Nd5 8.cd5 Qd5 9.e3 Bg7 10.d4 e5 11.Nf3 ed4 12.Nd4 (12.ed4!? 0–0 13.Be2=+) 12...0–0–/+ 13.Qb3 Be6 14.Rb1 Qb3 15.Nb3 Bf5 16.Nd2 Bb1 (16...Bb1 17.Nb1 Bb2–+) 0–1. marekt – pcmvr, net–chess.com, 2020.

4.Bb2 Nf6 5.e4 d6 6.Nf3 Bg7 7.Be2 Nbd7 8.0–0 e5 9.Nc3 0–0 10.a3 Nc5 11.d4 ed4 12.Nd4 Nfe4 13.Ne4 Ne4 14.Re1 Nc5 15.Qd2 Bd7 16.Bf3 Re8 17.Bd5 Qf6 18.Rab1 Re1 19.Re1 Nb3 20.Nb3 Qb2 21.Qf4 Rf8 (21...Rf8 22.Nc1 Qa3–+; 21...Qb3 22.Qf7 Kh8 23.Qd7 Qa3 24.Bb7=; 21...ab3?! 22.Qf7 Kh8 23.Qd7=) 0–1. Topot,Iwan (1695) – Adrenalyn,Roman (1940), SL–2006–0–00046, 2006.

4.Bb2 Nf6= 5.e4 Bg7 =.

4.d4 Bg7 +=.

3.e3 c5

4.c4 Qc7 5.Nf3 e5 6.Nc3 e4? (better 6...Nf6!?+=) 7.Ne4+– Nf6 (7...Nh6 8.Bb2+–) 8.Nf6 gf6 9.Bb2 Be7 10.Bd3 h5 (10...d6 11.Be4+–) 11.0–0 h4 (11...Rg8 12.Nh4+–) 12.Ng5! fg5? (12...d6+–) 13.Bh8 h3 14.Qh5 (14.g3 d6+–) 14...d5 (14...hg2 15.Kg2 d6 16.f4 gf4 17.Rf4+–) 15.f4 (better 15.Bg7 Qd6 16.Rfc1 hg2 17.Qh8 Bf8 18.Bf8 Qf8 19.Qf8 Kf8 20.cd5 b6+–) 15...d4 (15...hg2 16.Kg2 g4+–) 16.Be5 (worse 16.fg5 Be6 17.g6 fg6 18.Qg6 Kd7 19.ed4 Na6+–) 16...Qd7 (16...Qa5 17.fg5 Be6 18.g6 Qd2 19.Rf2+–) 17.fg5 Qg4 (17...Qe6 18.g6 hg2 19.gf7 Kd7 20.f8N Bf8 21.Rf8 Nc6+–) 18.Qf7 Kd7 (18...Kd8 19.Qg8 Kd7 20.Qd5 Bd6 21.Qd6 Ke8 22.Bg6) 19.Qd5 Ke8 (19...Bd6 20.Qd6 Ke8 21.Bg6) 20.Bg6 1–0. GuestBMGQ – GuestSTRD, freechess.org, 2019.

4.c4 d5 5.Bb2 e6 6.cd5 ed5 7.Nc3 d4 8.ed4 a3 9.Bc1 cd4 10.Ne4 d3 (10...f5 11.Ng3 d3–/+) 11.Qb3 (better is 11.Qf3=) 11...Qe7 12.Bd3 f5 13.Ne2 (13.Qc2 Nd7 (13...fe4? 14.Qc8 Kf7 15.Bc4 Kf6 16.Bd5+–) 14.Ba3 Qa3–/+) 13...fe4 14.Bc4 Nf6 15.0–0 Bf5 (15...Nbd7 16.d3–+) 16.f3 (16.Ng3 Bg6–+) 16...ef3 (16...Qc5 17.Kh1–+) 17.Rf3 Qe5?? (better is 17...Be4 18.Rf2 Qb4–+) 18.Re3 Bc5 19.d4 Qe3?? (better is 19...Bd4 20.Nd4 Be4+–) 20.Be3 (worse is 20.Qe3 Be7 21.Qe5 Bc8 22.Ba3 Ra3+–) 20...Be7 21.Bf7 Kf8 22.Rf1 Be4 (22...Bd7 23.Nf4 Ra5 24.Bg6 hg6 25.Ng6 Ke8 26.Nh8 Rb5 27.Qf7 Kd8 28.Qg7+–) 23.Qe6 (better is 23.Bh5 Bg6 24.Bg6 hg6 25.Qe6+–) 23...Bd3 (23...Bd5 24.Qf5 Bf7 25.Qc8 Be8 26.Bd2+–) 24.Re1 (24.Rf6 Nd7 25.Bg6 Bf6 26.Qf7) 24...Bb5+– 25.Qc8 Kf7 26.Qh8 Bf8 27.Bg5 Nbd7 28.Nc3 Bc6 29.d5?? (better is 29.Bd2+–) 29...Bc5–+ 30.Kh1 (30.Be3 Be3 31.Re3 Rh8 32.dc6 bc6–+) 30...Rh8 31.dc6 bc6 32.Nb1 (32.Bf4 Nd5 33.Nd5 cd5–+) 32...Ng4 33.h3 Nf2 34.Kh2 Bd6 35.g3 Ne5 36.Na3 (36.Rf1 Kg6 37.Rf2 Kg5–+) 36...Nf3 (36...Nfd3 37.Re3 Ba3 38.Bf4–+) 37.Kg2 Ne1 38.Kf2 Ba3 39.Ke1 Ra8 40.Kd1 (40.Bf4 Bb4 41.Ke2 Ra2 42.Kd3 Ra3 43.Ke2 Ke6–+) 40...Bd6 0–1. mikebaldini (1680) – franchessco88 (1680), gameknot.com, 2015.

3.e3 d5

4.Nf3 Bg4 5.Ba3 Nd7 (5...e5 6.Bf8 Kf8 7.Be2=) 6.d4 Ngf6 7.c4 (7.Be2 e6=) 7...c6 (7...e5 8.Bf8 Rf8 9.Be2=) 8.bc6 bc6 9.Nbd2 Ne4 10.h3 Bh5 (10...Nd2 11.Qd2 Bf3 12.gf3=) 11.Bd3 Qa5 12.Qc2 White plans c5 12...Bf3 13.gf3 Nd2 14.Qd2 Qd2 15.Kd2 e5 16.c5 (16.Bf8 Rf8 17.cd5 cd5 18.de5 Ne5=) 16...Be7 (16...g6 17.Rab1=) 17.Rab1 Bf6 18.Kc3 g6 19.Rb7 (19.f4 ed4 20.ed4 Bh4=) 19...ed4 Black fights for the Initiative 20.ed4 Nf8 21.Re1 Ne6–/+ 22.Re6 fe6 23.Rc7 e5 24.Rc6 ed4 25.Kc2 0–0 26.Rd6 Be7 27.Rd7 Rf7 28.Kd1 Kf8 29.Rd5–/+ Rf3 30.Ke2 Rh3 31.Rd4 Rh4 32.Rh4–/+ Bh4 33.Ke3 Be7 34.Kd4 Rc8 35.Bc2 Rc7 36.Kd5 Kf7 37.Bb4–/+ Ra7 38.Kc6 h5 39.Kb6+= Ra8 40.Kb7 Rf8 41.Ba4 The passed pawn on a2 quickly leads to threats 41...h4 42.Bc6? h3 43.a4? h2 44.a5–/+ Ke6 45.a6 Rf7 46.Kb6+= Bd8 47.Kb5 g5 48.Ba5?? Ba5–+ 49.Ka5 g4?? 50.Kb6= Rf3 51.Bf3 gf3 52.a7 h1Q 53.a8Q ½–½. Weber,Bernd – Boehnisch,Manfred, DDR–ch U18 Ruhla, 1957.

4.f4 Nf6 5.Nf3 Bd7 6.Be2 e6 7.0–0 Bd6 8.Bb2 0–0 9.Ne5 Qe8 10.c4 dc4 11.Nc4 (worse is 11.Bc4 Bb5 12.Na3 Bc4 13.Nec4 Be7–/+) 11...Bb5 12.Nd6 cd6 13.Bf6 gf6 14.Nc3 Be2 15.Qe2 f5 16.e4 fe4 17.Ne4 f5 18.Ng5 Rf6 19.Rab1 Qc8 20.Rfc1 Nc6 21.Rb6 Qc7 22.Rcb1 Na5 23.Ne6 Qe7 24.Nd4 Qe2 25.Ne2 Re6 26.Nd4 Re4 27.Nf5 Rf4 28.Nd6 Rd4 29.Nb7 Nc4 30.R6b4 Nd2 31.Rd4 Nb1 32.Nc5 Nc3 33.a3?? Ra5 34.Rc4 Nd5 35.Na4 Ne3 36.Re4 Nc2 37.Rg4 Kf7 38.Nb6 Ra3 39.h4 Ne3 40.Rf4 Ke6 41.Kh2 Ke5 42.Rf3 Nf1?? 43.Kg1 Rb3 0–1. lllllll21 – otkrovenie (1635), kurnik, 2011.

3.e3 e6

4.c4 Bb4 5.a3 Ba5 6.Nc3 (6.Bb2 Nf6+=) 6...Bc3= 7.dc3 d6 8.Bd3 (8.c5 Nf6=) 8...Nd7 9.Nf3 Nc5 10.Bc2 Nf6 11.0–0 e5 12.Nd2 Bg4 13.f3 Bh5 14.e4 0–0 15.Rf2 c6 (15...Qe7 16.Rb1=) 16.Rb1= Qa5 17.Rb4 Rfd8 18.Re2 Ne8 (18...Bg6 19.Nf1 d5 20.Be3 de4 21.Rd2=+) 19.Nf1 f6 (19...Nc7 20.Rd2=) 20.Ng3+= Bf7 21.Be3 Nc7 (21...Be6 22.Rd2+=) 22.Rd2+– N7e6 (22...Ne8 23.Nf5 Qc7 24.b6+–) 23.Nf5 (23.Rd6?! Rd6 24.Qd6 Rd8=) 23...cb5 (23...Rd7 24.Nd6 Rad8 25.Nf7 Kf7 26.Rd7 (26.Ba4?! Rd2 27.Bd2 Na4 28.Ra4 Qb6 29.Kf1 cb5=+) 26...Rd7 27.Qe1+–) 24.cb5+– Qc7 (24...Rd7 25.Nd6 Rad8 26.b6+– (26.Ba4 Na4 27.Nc4 Nc3–/+; 26.Nf7?! Kf7 27.Rd7 Rd7+–)) 25.b6 (25.Rd6?! b6+–) 25...Qc6?? (25...Qd7+–) 26.Ne7 (26.Ne7 Kh8 27.Nc6 bc6 28.Bc5 Nc5 29.Rd6+–) 1–0. onur604 (2320) – tomyumchess (2145), lichess.org, 2020.

4.c4 Be7 5.Bb2 Bf6 6.Bf6 Nf6 (worse is 6...gf6 7.Nc3+/–) 7.a3 0–0 8.Nc3 d5 9.Na4 dc4 10.Bc4 Nd5 11.Ne2 (11.Nf3 c6+/–) 11...Bd7 (11...Ne3!? 12.de3 Qd1 13.Kd1 Ra4+=) 12.Nc5 Be8 (12...c6 13.Qb3+/–) 13.a4 (13.Nb7 Qe7 14.d4 Ra3+–) 13...Qd6 14.Ne4 Qe5 15.N4c3 c6 16.0–0 cb5 17.ab5 Ra1 18.Qa1 Nd7 (18...Nc3 19.Qc3 Qg5 20.Rc1+–) 19.Nd5 (19.Bd5!? ed5 20.Qa7 Qd6+–) 19...ed5 20.Qe5 (better is 20.Bb3!? Qa1 21.Ra1+–) 20...Ne5+= 21.Bd5 Bb5 22.Re1 Rd8 (22...Be2 23.Re2 Nd3 24.e4+=) 23.Bb7 Rd2 24.Nd4 Bc4 25.h3 Nd3 26.Ra1 g6 27.Bf3 (better is 27.Ra4!? Be6 28.f4+/–) 27...Nf2= (27...Rf2? 28.Ra4 Be6 29.Ne6 fe6 30.Rd4+–) 28.Ra8 Kg7 29.Nc6 Nd3 30.Ra7 Kh6 31.Rd7 Rb2 32.Rc7 Rb1 33.Kh2 Ne1 (better is 33...Re1!?=) 34.Ne5+/– Nf3 35.gf3 Be6 36.Nf7 Bf7 37.Rf7 Rb5 38.h4 Rf5? (better is 38...Rb3!? 39.Re7 g5+/–) 39.Rf5+– gf5 40.Kg3 Kg6 41.Kf4 Kf6 42.h5 h6 43.e4 fe4 44.fe4 (44.Ke4 Ke6 45.f4 Kf6+–) 44...Kg7 45.Kf5 Kf7 46.e5 Kg7 (46...Ke7 47.Kg6+–) 47.e6 Kf8 48.Kf6 Ke8 49.e7 Kd7 50.Kf7 1–0. mvb9999 – mikebaldini, gameknot.com, 2013.

4.c4 Nh6 5.Nf3 d5 6.cd5 (6.Nc3+=) 6...Qd6 (6...ed5 7.Be2=) 7.Nc3 (7.de6 Qe6 8.d4 c6+–) 7...a3 (7...ed5 8.Na4 Nd7 9.Qc2+=) 8.Be2 (8.Bc4+–) 8...c6? (8...ed5 9.0–0+=) 9.Kf1?? (9.dc6 bc6 10.Rb1 Bb7+–) 9...Nd7? (better 9...cd5 10.d4 Ng4=) 10.Qa4?? (better 10.dc6 bc6 11.Rb1+–) 10...Ne5 (10...Ra4 11.Na4 cd5 12.Rb1–+) 11.Bd1 (better 11.Qa8!? Kd8 12.dc6 b6 13.Ba3 Qa3 14.Qa3 Ba3 15.Ne5 Bb2+–) 11...Nd3 (better 11...Ra4 12.Na4 Nf3 13.Bf3 cb5–+) 12.Qb3 (better 12.Qa8 Kd8 13.dc6 bc6 14.bc6 Nc1 15.Rc1+–) 12...Nc1 (better 12...ed5 13.Bc2 Nc5=+) 13.e4?? (better 13.Rc1 ed5 14.Na4=) 13...Nd3 (better 13...Nb3 14.Bb3 ed5 15.ed5 cb5 16.Nb5 Qf4–+) 14.g3 (14.Qb1 Nb4 15.bc6 ed5 16.Nd5 bc6 17.Qb4 cd5 18.Qb5 Kd8 19.Qd5 Qd5 20.ed5 Bd6–+) 14...Kd8 (14...ed5!? 15.Be2 Nc5 16.Qb4 Ne4 17.Qd4–+) 15.Qc4? (15.bc6 bc6 16.Qb6 Qc7 17.Qc7 Kc7 18.Be2–+) 15...Bd7 (15...Nb2 16.Qb3 ed5 17.ed5 cb5 18.Kg2–+) 16.e5?? (16.Qd3 ed5 17.ed5 cb5=) 16...cd5?? (better 16...Ne5 17.Ne5 Qe5 18.dc6 bc6–+) 17.Rb1?? (17.Qd3 Qb6 18.Kg2 Ng4=) 17...Qb6 (better 17...dc4 18.ed6 e5–+) 18.Rb4?? (better 18.Qd3 Rc8 19.Kg2=) 18...Nb2 (18...Qf2) 19.Ng5 (19.Qh4 Be7 20.Qd4 Qd4 21.Rd4 Nd1 22.Nd1 Bb5 23.Kg2 Nf5–+) 19...Qf2! 20.Kf2 Nf5 (better 20...dc4 21.Rb2 ab2–+) 21.Kf3 (better 21.Nf7!? Ke8 22.Qc7 Rc8 23.Qb7 Bc5 24.Kg2 Rf8 25.Rb2 ab2+–) 21...f6 (better 21...dc4 22.Rb2 ab2 23.Nf7 Kc7 24.Nh8 Nd4 25.Kg2 Bb4–+ (worse 25...Nb5 26.Bf3–+; worse 25...Bb5 26.Bf3–+)) 22.Kf2 (better 22.Nf7 Ke8 A) 23.Nh8? dc4 (worse 23...Nc4 24.Rc4 dc4 25.Be2–+) 24.Ra4 Ra4 25.Ba4 Na4–+; B) 23.Qc7+–) 22...Be8 (better 22...dc4!? 23.Rb2 Bc5 24.Kg2 ab2 25.Nf7 Ke7 26.Nh8–+) 23.Kf1 (better 23.Ne6 Ke7 24.Qd5 fe5 25.Rb2 ab2 26.Qe5+–) 23...Nc4 (better 23...dc4 24.Ne6 Kd7 25.Nf8 Rf8 26.ef6 Nd1 27.Nd1 Rf6–+) 24.Kg1 (24.Ne6 Kd7 25.Nf8 Rf8 26.ef6 Rf6 27.Nd5 Nfe3 28.Ke1 Nd5 29.Rc4 Kd6–+) 24...Bb5 (better 24...fg5 25.Rc4 dc4 26.Bf3–+) 25.ef6?? (25.Ne6 Ke7 26.Ng7–+) 25...Ne5 (better 25...Bb4 26.Nb5 Kd7 27.fg7 Rhg8–+) 26.Rb5 (better 26.Ne6 Kd7 27.Nf8 Rhf8 28.fg7+–) 26...d4?? (26...Ra6!? 27.fg7 Bg7=+) 27.Ne2?? (better 27.Re5 dc3 28.Ne6 Kd7 29.Nf8 (29.Rf5?! Ke6 30.g4 cd2=) 29...Rhf8 30.Rf5 cd2 31.Rd5 Ke6 32.Rd2 Kf6 33.Kg2+–) 27...Bc5?? (27...gf6 28.Ne6 Kd7 29.N2d4 Nd4 30.Nd4 Rd8+=) 28.Rb3 (better 28.Rc5 gf6 29.Ne6 Ke7 30.N6d4 Nd4 31.Nd4+–) 28...Nd6?? (better 28...d3 29.Kg2 de2 30.Ne6 Kd7 31.Nc5 Kc6=) 29.Nc3 (better 29.Ne6 Kc8 30.fg7+–). aravind555 (1775) – ArthurFCN (1760), lichess.org, 2020.

4.Nf3 a3 5.c4 d5 6.cd5 ed5 7.Bd3 (7.Qb3 Qd6=) 7...Bg4 8.0–0 Qf6 9.Nc3 Bf3 10.gf3 c6 (10...Bd6 11.f4=+) 11.f4 Nh6 12.Qc2 Ng4 (better 12...Nd7!?=+) 13.f3+– h5 (better 13...Nh6!? 14.bc6 bc6 15.Nd5 Qd8+–) 14.fg4+– hg4 15.Rf2 Qh4 16.Ne2 Bd6 17.Ng3 g5? (better 17...Qf6 18.Rb1 g6+–) 18.Nf5 Qh3 (18...g3 19.Nh4 gf2 20.Kf2 Rh4 21.bc6 bc6+–) 19.Nd6 Kd7 20.Nf7 g3 (20...gf4 21.Bf5 Ke7 22.Nh8 Qh8 23.Qc5 Kf7 24.Rf4+–) 21.Bf5 (21.Bf5 Ke7 22.Bh3 gf2 23.Kf2 Rh3 24.bc6 Nc6 25.Rb1+–) 1–0. onur604 (2320) – Eduard43 (2075), lichess.org, 2020.

4.Nf3 h5 5.c4 h4 6.Bd3 (6.Nc3 h3+=) 6...g5 (6...h3 7.g3+=) 7.Bb2 Rh6 8.0–0 d6 9.h3 (9.Bc2 g4 10.Nd4 Nf6+–) 9...e5+= 10.e4 (better 10.Nh2+=) 10...g4–/+ 11.hg4 Bg4 12.Be2 h3 13.g3 Nf6 14.Nh4 (14.Kh2=+) 14...Rh4 (better 14...Be6!? 15.d3 c6–/+) 15.gh4= Be6 16.d3 Nfd7 17.Nd2 Qh4 18.Kh1 Nf6 (18...c6 19.Nf3 Qf6 20.Rg1=) 19.Nf3 Qh8 20.Ng5 Bh6 21.Ne6 fe6 22.Bg4 Ke7 23.Qf3 (23.Bh3? Bc1 24.Kg2 Bb2–+) 23...Nbd7 24.Bh3 Bf4 25.Rg1 Rf8 26.Rg6 Qh4 (26...Rf7 27.Rgg1=+) 27.Rg7 Kd8 28.Kg1 Nc5 29.b6 cb6 30.Kf1 Rh8 (30...Bh6 31.Qg3 Qh5 32.Rg4–+) 31.Bg2=+ Qh6 32.Rf7 Qg6 33.Rf6 Qf6 34.Rd1 Rh2 35.Bc1 (35.Ke2 Ke8=+) 35...Rh4 (35...Qg5! 36.d4 Nd7 (worse 36...Bc1 37.dc5 Bf4 38.Rd6 Kc7 39.Rb6+–) 37.Bf4 ef4=+) 36.Ba3 Qg6 0–1. DEFFM – GuestHPJL, freechess.org, 2018.

3.e3 Nf6

4.Bb2 d5 5.c4 e6 6.a3 c6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6 6.c4 a4).

4.c4 c6 5.Nc3 d5 (5...e5 6.Na4 cb5 7.cb5=) 6.Na4 cb5 7.cb5 d4 (7...e5 8.Bb2 Bd6 9.Rc1=) 8.Bb2 (8.ed4 Bg4 9.Be2 Qd4=) 8...Qa5 (8...Bg4!? 9.Qc2 e5+=) 9.Qc2+– Bd7 (9...Be6 10.Nc5 de3 11.Ne6 ef2 12.Kf2 fe6 13.Qc8 Qd8 14.Qd8 Kd8 15.Nf3+–) 10.Nc5 Bb5?? (better 10...de3 11.fe3 Qc7+–) 11.Nb7+– Qb6 (11...Bd7 12.Na5 Ra5 13.Bd4 Nc6+–) 12.Qc8 (12.Qc8 Qd8 13.Qd8) 1–0. DEFFM – zeleo, freechess.org, 2018.

4.c4 d5 5.Nc3=.

4.c4 e6 5.Nc3 a3 (5...d5!?=) 6.Nf3+– d5 7.d4 b6 (7...Be7 8.Bd3+–) 8.cd5 Nd5 (8...ed5 9.Qb3+–) 9.Bd2 (9.Nd5 Qd5 10.Bd3 Nd7+–) 9...Bb7 (9...Nc3 10.Bc3 Nd7 11.Bd3+–) 10.Qb3 (10.Nd5 Qd5 11.Bd3 Nd7+–) 10...Be7 (10...Nc3 11.Bc3 Nd7 12.Bd3+=) 11.Bc4 (11.Bd3 Nc3 12.Bc3 Nd7+=) 11...0–0 (11...Nc3 12.Bc3 Nd7 13.Rd1+=) 12.Nd5 ed5 13.Bd3 c5 (13...Nd7 14.0–0+=) 14.bc6!+– Nc6 (14...Bc6 15.Rb1 Combination; 14...Nc6 15.Rb1 Combination) 15.Rb1 (15.0–0+–) 15...Ba6 (15...Qd6!?+–) 16.Ba6+– Ra6 17.Qb5 Nb8 18.Ne5 Qd6 (18...Bf6!?+–) 19.Bb4 Qe6 20.Be7 Qe7 21.Qd5 Rc8 (21...g6 22.0–0+–) 22.0–0 Ra5 23.Qb3 Nd7 24.Rfc1 Raa8 25.Rc8 (25.Nd7 Qd7 26.Rc8 Rc8 27.Qa3 Qc7+–) 25...Rc8 26.Nd7 Qd7 27.Qa3 Qd5 (27...b5 28.Rc1 b4 29.Qb2+–) 28.h3 (28.Rb6?? Qa5!? 29.Qd3 Rc1 30.Qf1 Rf1 31.Kf1 Qb6–+) 28...Ra8 (28...Rb8 29.Qc5! Qd8 30.Qc6+–) 29.Qb3 (better 29.Rb6!? h6 (29...Ra3?? 30.Rb8 Qd8 31.Rd8) 30.Qb3 Qd7+–) 29...Qb3 30.Rb3 Ra2 31.Rb6 h5 (31...g6 32.g4+–) 32.g3 g6 (32...Kf8 33.Rb7+–) 33.Kg2 (33.g4 hg4 34.hg4 Kf8+–) 33...Kf8 (33...Kg7 34.g4 hg4 35.hg4+–) 34.g4 (34.d5 Ra4+–) 34...h4 (34...Ra5 35.Kg3+–) 35.g5 Ke7 (35...Ra5 36.f4 Ra1+–) 36.Kf3 Kf8 (36...Kd8 37.Rf6 Ra7 38.Kg4+–) 37.Rf6 Ra1 38.Rf4 (38.Kg4 Rg1 39.Kh4 Re1+–) 38...Ra5 (38...Rb1 39.Kg4 Rg1 40.Kh4+–) 39.Kg4 Ke8 (39...Ra2 40.f3+–) 40.Kh4 (40.Re4 Kd7+–) 40...f5 (40...Ra2 41.Re4 Kd7 42.f4+–) 41.e4 Ke7 (41...fe4 42.Rf6 Rd5 43.Rg6 Kf7 44.Rf6 Kg7+–) 42.ef5 gf5 43.Kh5 Kf7 44.Kh6 Ra6 (44...Kg8+–) 45.Kh7 Ra5 46.h4 (better 46.g6 Kf6 47.g7 Ra7+–) 46...Rd5 47.h5 (47.g6 Kf6 48.g7 Rd7+–) 47...Ra5 48.d5! Rd5 49.Ra4 Rd7 50.Ra6 f4 51.Rf6 Ke8 52.Kg6 Rd4 53.h6 f3 54.h7 Rh4 55.Kg7 (55.Kg7 Ke7 56.h8Q Rh8 57.Kh8 Kd7 58.g6 Kc7 59.g7 Kb7 60.g8Q Kc7 61.Qg7 Kd8 62.Rf8) 1–0. Wilk,Krzysztof (2125) – Pena Gomez,Manuel (2490), European Rapid, 2017.

2.b5 b6

3.Ba3 Bb7 =.

3.Ba3 Nc6?? 4.bc6+– Bb7?? (4...dc6 5.Nf3 e5 6.Bf8 Kf8+–) 5.cb7 Ra7 6.e4 Rb7 7.Qf3 c6 8.Nc3 Qc7 9.0–0–0 (9.Ba6 Rb8 10.Bb2 e6+–) 9...e6 10.Nge2 (better is 10.Bf8 Kf8 11.d4+–) 10...Ba3 11.Kb1 b5 12.Nd4 (better is 12.d4+–) 12...c5? (better is 12...Nf6+–) 13.Nb3 Nf6?? 14.Nb5+– Qc6 15.Na3 Qa4 16.e5 c4 17.Nc4 Nd5 18.Nd6 Ke7 19.Nb7 Qb4 20.N7a5 Qa3 21.Bc4 Nb4 22.Nb7 d5 23.Qc3 Qa2 24.Kc1 Rc8 25.Qb4 Kd7 26.Qd6 Ke8 27.Bb5 Rc6 28.Bc6 1–0. dimiternikolov – idontknow, net–chess.com, 2006.

3.a4 Na6?? 4.ba6+– Ba6 5.Nf3 Qb8 (5...Nf6 6.Nc3+–) 6.e4 (6.Nc3 Nf6+–) 6...Qb7 (6...Bf1 7.Kf1 e6 8.Bb2+–) 7.Ba6 Qa6 (7...Ra6 8.Nc3+–) 8.d3 0–0–0 (8...g6 9.Nc3 Bg7 10.e5+–) 9.Ne5 d6 (9...Nh6 10.Bh6 gh6 11.Nf7 Bg7+–) 10.Nf7 Nf6 (10...Rd7 11.Nh8 e5 12.Nc3+–) 11.Nd8 (better is 11.Nh8 e5+–) 11...Kd8 12.0–0 g6 13.Bb2 Rg8 (13...Bg7 14.Na3+–) 14.Bf6 ef6 15.Nc3 f5 (15...Bg7 16.Rb1+–) 16.ef5 gf5 17.Nb5 (17.Qh5 Qb7 18.g3 c6+–) 17...c6 (17...Qb7 18.g3 c6 19.Qf3+–) 18.Nc3 (better is 18.Qh5 Qb7 19.Nd4 Qd7+–) 18...b5 (18...Bg7 19.Ra3+–) 19.ab5 cb5 20.Qh5 (better is 20.Qf3 Bg7 21.Qd5 Bc3 22.Qg8 Kc7 23.Qh7 Kb6+–) 20...Qc6 21.f3 (better is 21.Ne4! fe4 22.Qf7 Rg2 23.Kg2 ed3 24.f3 Qe8 25.Qh7 Qe2 26.Rf2 Qe7 27.Qe7 Be7 28.Ra5 b4+–) 21...Qc3 22.Qf7 (better is 22.Qh7 Rh8 23.Qa7+–) 22...Qc2 (22...Qg7 23.Qg7 Rg7 24.Ra5 Rc7+–) 23.Qg8 Kd7 24.Qf7 Kd8 25.Rac1 Qd3 26.Qf8 Kd7 27.Rfe1 Qd4 28.Kh1 h5 29.Qe8 1–0. tomy (2255) – idontknow, net–chess.com, 2007.

3.a4 d6 4.c4 (4.d4 Nf6=) 4...Nf6 5.Bb2 e5 6.e3 Bb7 7.Nf3 Nbd7 8.Be2 Be7 9.0–0 0–0 10.Qc2 Re8 11.Nc3 Bf8 (11...c5 12.bc6 Bc6 13.d4=) 12.Ng5 (12.d4 ed4 13.Nd4 Nc5+=) 12...g6 (12...Be7 13.f4=) 13.f4 ef4 14.ef4 Bg7 15.Bd3 White prepares the advance f5 (15.Rae1 Rc8+=) 15...Nc5 16.f5 Nd3 17.Qd3 Rf8 (17...Nd7!? 18.fg6 fg6=) 18.fg6+= hg6 (worse is 18...fg6 19.Ne6 Qd7 20.Nf8 Rf8 21.Rf4+–) 19.Qh3 (19.Rae1 Nd7 20.Qg3 Bd4 21.Kh1 Ne5+=) 19...Bc8 (better is 19...Qd7!?=) 20.Qh4+/– Bf5? (20...Nh5 21.Rae1 Bf6=) 21.Nd5 Do you see the mate threat? 21...Re8 (21...Nh5 22.Bg7 Kg7 23.Rf5 Qd7+–) 1–0. Rohrbacher,Walter – Glatzer,Karl, Baden–ch Sen, 1988.

3.a4 h6 4.Bb2 e6 5.e3 Bb7 6.Nf3 Bf3? (better is 6...Nf6!?=) 7.Qf3+/– c6 8.c4 Ra7 9.Be2 d5 10.cd5 (better is 10.Nc3!? Nf6 11.bc6 Nc6 12.cd5 ed5 13.Nb5+–) 10...cd5+/– 11.0–0 Ne7 (11...Nf6 12.Rc1+/–) 12.Qg3 (12.Nc3 Nd7 13.d4 Nf6+/–) 12...Rg8 (12...Nf5!? 13.Qh3 Nd7+=) 13.Nc3 Nd7 14.d4 Nf6 15.Bd3 g5 16.Ba3 (16.e4 Nh5 17.Qf3 Nf4+/–) 16...h5 17.Qe5 (17.Rfc1!?+/–) 17...Ng4 18.Qg3 f5 (better is 18...Nf6!?=) 19.h3 h4 20.Qd6 Qd6 21.Bd6 Nf6 22.Rac1 Ng6 23.Bf8 Kf8 24.Ne2 g4 (24...Ne7!?+=) 25.hg4+/– Ng4 26.Rc8 (26.Rc6 Ke7 27.Rb6 h3 28.gh3 Ne3 29.fe3 Ne5 30.Kh2 Nd3+–) 26...Kg7 (26...Kf7 27.Rg8 Kg8 28.Rc1+=) 27.Rg8 (27.Rc6 Kf6 28.Nc3 Ne7 29.Rb6 h3+/–) 27...Kg8+= 28.Rc1 Rh7? (better is 28...Kf7+=) 29.Rc8 (better is 29.Rc6 Rb7 30.Bf5 ef5 31.Rg6 Kf7+–) 29...Nf8? (better is 29...Kf7 30.Rc7 Ne7+–) 30.Nf4 h3 (30...Re7 31.Ne6! Re6 32.Bf5 Re3 33.fe3 (33.Bg4?! Rd3+/–) 33...Ne3 34.Be6 Kg7 35.Rc7 Kh8 36.Bf7+–) 31.Nh3 (better is 31.gh3 Nf6 32.Ne6+–) 31...Nf6 32.Ng5 Re7 33.g3 Ne8? (33...Kg7 34.f4+–) 34.Nf3 (34.Rc6 Kg7 35.Rb6 Kf6+–) 34...Nd6?? (34...Nf6+–) 35.Rc6 Nf7 (35...Ne4 36.Rb6 Nc3 37.Bc2+–) 36.Rb6 Kg7 37.Ra6 Kh6 (37...Kf6 38.Ra5 Rb7 39.Ra6+–) 38.Ra5 Kh5 (38...Nd7 39.Ra7 Nd8 40.Ne5 Ne5 41.Re7 Nd3 42.a5+–) 39.Ne5 (better is 39.b6!? Nd6 40.Ra7 Rb7+–) 39...Ne5 40.de5 Ng6 (40...Kg6 41.b6 Rb7 42.Ra8+–) 41.Be2 Kg5 (41...Kh6 42.f4 Nf8 43.Ra8+–) 42.f4 Kh6 43.Ra6 Nf8 (43...Kh7 44.a5 Rg7 45.Re6+–) 44.b6 Rb7 (44...Re8 45.a5 Rc8 46.b7 Rc1 47.Kf2+–) 45.a5 Nd7 (45...Rb8 46.Ra7 Kg6 47.Kf2+–) 46.Ra7 Nc5 47.Rb7 Nb7 48.a6 Nc5 49.b7 Na6 (49...Nd7 50.a7 Kh7 51.b8Q Kg6 52.Qg8 Kh6 53.Qh8 Kg6 54.Bh5) 50.Ba6 Kh5 (50...Kg7 51.b8Q d4 52.ed4 Kf7 53.Qd8 Kg7 54.Bc8 Kf7 55.Qf6 Kg8 56.Be6 Kh7 57.Qg5 Kh8 58.Qh6) 51.b8Q Kg4 (51...Kh6 52.Qg8 d4 53.ed4 Kh5 54.Qg5) 52.Kg2 (52.Be2 Kh3 53.Kf2 d4 54.Qh8) 52...Kh5 1–0. Fournier,Frederic (2090) – guestpnfp, jeu.europe–echecs.com, 2013.

3.Bb2 d5 4.a4 e6 5.e3 c6 (5...Nf6 6.Nf3=) 6.c4 (6.bc6 Nc6 7.Nf3 Nf6=) 6...cb5 (6...Nf6 7.Qf3=) 7.ab5 (better 7.cd5 Qd5 8.Nc3+=) 7...Bb4?? (7...Nf6 8.Nf3=) 8.Nc3 (better 8.Bg7 dc4 9.Bh8+–) 8...f6 (8...Nf6 9.cd5 ed5 10.Nf3=) 9.Qh5 (9.cd5 Bc3 10.Bc3 Qd5+=) 9...g6 10.Qd1 e5? (better 10...Ne7!?=) 11.Nd5+– Bb7 (11...Bd6!?+–) 12.Nb4+– ab4 13.Qb3 (13.Ra8 Ba8 14.d4 Nd7+–) 13...Ra1 14.Ba1 Qe7 15.Nf3 (15.Ne2 Nd7 16.d4 Nh6+–) 15...Nd7 (15...Bf3 16.gf3 Nd7 17.d4+–) 16.Be2+– Nc5 17.Qb2 (17.Qb1 Be4 18.d3 Nd3 19.Bd3 Bd3 20.Qd3 e4+–) 17...Nh6 (17...Bf3!? 18.gf3 Qd6+–) 18.0–0+– g5 (18...Ne4 19.Qc2+–) 19.Qb4 g4 20.Nh4 (20.Ne1 Ne4 21.Qb2 Qe6+–) 20...f5 (20...e4 21.Qa3+–) 21.g3 (21.d4 Qh4 22.dc5 Qe7+–) 21...Rg8 22.d4 Nd7 23.Qe7 (23.Bc3 Rg7+–) 23...Ke7 24.de5 Be4 (24...Ra8 25.f4+–) 25.Bd4 (25.f3 gf3 26.Nf3 Ra8+–) 25...Ke6 (25...Ra8 26.f3 gf3 27.Bf3 (27.Nf3?! Ra2 28.e6 Nc5+–) 27...Bf3 28.Nf3+–) 26.Rd1 (26.f3 gf3 27.Nf3 Ng4+–) 26...Ne5? (26...Nf7+–) 27.Bb6 Nf3 (27...Ra8 28.c5+–) 28.Nf3 gf3 29.Bd3 (29.Bf1 Ng4+–) 29...Rb8 (29...Bd3 30.Rd3 Ra8 31.Rd1+–) 30.Bd4 (30.Bc7 Rc8 31.Be4 Rc7+–) 30...Rc8 (30...Bd3 31.Rd3 Nf7 32.Ra3+–) 31.c5 (31.Bf1 Ng4+–) 31...Kd5 (31...Bd3 32.Rd3 Kd5 33.Rd1+–) 32.Kf1 (better 32.Bf1 Nf7+–) 32...Ng4 (32...Bd3 33.Rd3 Kc4 34.Ra3 Kb5 35.Ra7+–) 33.h4 (33.h3 Ne5 34.Be5 Ke5+–) 33...Nh2 (33...Bd3 34.Rd3 Kc4 35.Ra3 Kb5 36.Ke1+–) 34.Ke1 (34.Kg1 Bd3 35.Rd3 Ng4+–) 34...Ng4 (34...Bd3 35.Rd3 Kc4+–) 35.b6 h5 (35...Bd3 36.Rd3 Rb8 37.Ra3+–) 36.Ba6 (36.Bb5 Ke6+–) 36...Rb8 37.b7 (better 37.Bb5 Ne5 38.Rc1 Nd3 39.Bd3 Bd3+–) 37...Kc6 38.Rc1 Bd5 (38...Kd7 39.c6! Bc6 40.Rb1+–) 39.Rc3 (39.Rb1 Be4 40.Rb6 Kc7+–) 39...Nh2 (39...Kd7 40.c6! Bc6 41.Rb3+–) 40.Rc2 Ng4 (40...Rb7 41.Bb7 Kb7 42.Rb2 Kc7 43.Rb6+–) 41.Rb2 f4 (41...Be4 42.Bb5 Kb7 43.Be8 Kc8 44.Rb8 Kb8 45.Bh5+–) 42.Rb6 (better 42.gf4!? Kc7 43.c6 Bc6 44.Bb6 Kd7+–) 42...Kc7 43.Rb4 (better 43.gf4 Bb7 44.Bd3 Ra8+–) 43...Kc6?? (43...fg3 44.fg3 Bb7 45.Bb7 Rb7 46.Rb7 Kb7 47.Kf1+–) 44.Rb5 (44.gf4!? Kc7 45.c6 Bc6 46.Bb6 Kd6+–) 44...Bf7?? (better 44...fg3 45.Rb6 Kc7 46.fg3 Bb7 47.Bb7 Rb7 48.Rb7 Kb7+–) 45.Be5 (better 45.gf4 Bd5 46.Rb4+–) 45...Ne5–/+ 46.Rb6 Kc5 47.Rf6 (better 47.Rb5 Kd6 48.gf4 Nd3 49.Kd2 Nf2 50.Kc3–+) 47...Bd5?? (47...fg3 48.fg3 Bc4 49.Rf5 Ba6 50.Re5 Kc4 51.Rh5 Bb7 52.Ra5–+) 48.Rf4?? (better 48.gf4 Nd7 49.Rf5=) 48...Bb7–+ 49.Bb7? (better 49.Rf5 Ba6 50.Re5 Kc4 51.Re6–+) 49...Rb7 50.Rf5 Rb1 51.Kd2 Kd5 52.Rh5 Ke6 (52...Rf1 53.Kc3–+) 53.Rg5? (better 53.e4 Ng4 54.Ra5–/+) 53...Nc4?? (better 53...Rf1 54.Kc3 Kd5–+) 54.Kc3 (better 54.Kd3!? Nd6 55.e4=) 54…Nd6 (54...Nd6 55.Rg6 Kd5 56.Rg5 Kc6=+) 0–1. AhmedSultanov (1645) – GALA47 (1650), lichess.org, 2019.

3.c3 Bb7 4.c4 Nf6 5.Bb2 (5.Nf3 e6=) 5...e6 6.e3 (6.Nf3 Bc5=) 6...d5 (6...Bb4 7.Nf3=) 7.Nf3 (7.cd5 Nd5 8.Nf3 Nd7=) 7...Be7 (7...c5 8.Be2=) 8.Be2 (8.cd5 Bd5 9.Nc3 Bb7=) 8...0–0 9.0–0 c5 (9...dc4 10.Bc4 c6 11.Nc3=) 10.bc6 (10.d3 Bd6=) 10...Nc6 11.Nc3 dc4 12.Bc4 Rc8 (12...Nb4 13.Ne5=) 13.Qe2 (13.d3 Nb4=) 13...Ng4 (13...Nb4=) 14.d4 (14.Nb5!?=) 14...Qc7–/+ 15.Nb5 (15.g3 Nce5 16.Ne5 Ne5 17.de5 Qc4 18.Qc4 Rc4–/+) 15...Nd4 16.Bd4 (16.Nfd4 Qh2) 16...Qc4 17.Qc4 Rc4 18.Bb6 (18.Rfc1 Bd5–/+) 18...Rb4 (18...Bf3 19.gf3 Rb8 20.Nd4 Rb6 21.fg4–+) 19.Rab1 (better is 19.a4!? Ra8 20.Rfc1+=) 19...Ba6–/+ 20.Nfd4? (20.a4!? Ra4 21.Rfc1–/+) 20...Bb5–+ 21.Nb5 Rb8 (21...Rb8 22.Ba5 R4b5 (22...R8b5?! 23.Bb4 Rb4 24.Rb4 Bb4 25.Rb1+=) 23.Rb5 Rb5–+) 0–1. Morozevich,A – Kastor, ICC, 2000.

3.c4 a4 4.Nc3+= h5 5.d4 h4 6.e4 f6 7.Qg4 f5?? 8.Qg6 1–0. Fritz 8 – NN, 2005.

3.c4 c6 4.Nc3 e6 (4...Nf6 5.Nf3=) 5.Nf3 d5 6.bc6 Nc6 (worse is 6...dc4 7.Qa4 Na6 8.e4+/–) 7.cd5 ed5 8.e3 Nf6 9.Bb5 Bb7 10.Bb2 Be7 11.0–0 0–0 12.d4 Rc8 13.Qb3 Exerts pressure on the isolated pawn 13...Bb4 14.Rfc1 Qd6 (14...Re8 15.Rab1+=) 15.a3+/– Bc3 16.Bc3 Ne4 17.Bd3 Ne7 18.Be1 Ng6 (18...Ra8 19.Ne5+/–) 19.Rc8 (19.Rcb1 Rc6 20.Ba5 ba5 21.Qb7+/–) 19...Rc8 (19...Bc8!? 20.Rb1 Bg4+/–) 20.Rb1+– Rc6 21.Ba5! ba5 22.Qb7 h6 (22...Nf8!?+–) 23.Qa8 Kh7 24.Qa5 f6 25.Ne1 h5?? (25...Qe6+–) 26.Be4 1–0. Fournier,Frederic (2470) – Dragon (2000), echecsemail.com, 2010.

3.c4 e6 4.Bb2 Bb7 5.e3 Nf6 6.Nf3 d6 7.d4 Nbd7 8.Nc3 Be7 9.Bd3 Nf8 (9...0–0 10.Qc2=) 10.e4 (10.0–0 Ng6+=) 10...N8d7 (10...Ng6 11.0–0+=) 11.0–0 Nf8 12.e5 (12.d5 Ng6+/–) 12...N6d7 13.Re1 (better is 13.ed6 cd6 14.d5+/–) 13...c6? (better is 13...de5 14.Ne5 Ne5 15.de5 Ng6+=) 14.Be4 White prepares the advance d5 14...Nb8 (better is 14...d5 15.bc6 de4 16.cb7 Rb8 17.Ne4 Rb7+–) 15.a4 (15.bc6 Nc6 16.ed6 Qd6+–) 15...Nfd7 (15...d5 16.bc6 Bc6 17.cd5 ed5 18.Bf5+/–) 16.Qd3 (16.ed6 Bd6 17.bc6 Nc6+–) 16...Nf8? (better is 16...de5!? 17.Rad1 ed4 18.Nd4 Qc8+=) 17.d5+– ed5 18.cd5 c5 19.e6 f6 20.Re3 Qc7 21.Nd2 Kd8 22.Rh3 h6 23.Re1 Kc8 24.Ree3 Qd8 25.Reg3 g5 26.Nd1 h5 27.Rg5 Qe8?? 28.Ne3 fg5 29.Bh8 Ne6 30.de6 Qh8 31.Bb7 Kb7 32.Qe4 Ka7 33.g4 h4 34.Nd5 Qd8 35.Nc4 Nd7 36.ed7 Qd7 37.Qe7 (37.Qe7 Qe7 38.Ne7+–; better is 37.Ncb6!? Qb7 38.Na8 Bd8 39.b6 Kb8+–) 1–0. Nielsen (2475) – Ebmeyer, corr ICCF EU/I/GT/42, 1969.

3.c4 Nh6 4.d4 e6 5.Bh6 gh6 6.a3 Bg7 7.e4 Bb7 8.Nc3 c6 9.Nf3 cb5 10.Nb5 d6 11.Bd3 Na6 12.0–0 0–0 13.Qa4 f5 14.ef5 ef5 15.Be2 Qe8 16.Rae1 Rd8 17.c5 dc5 18.Bc4 Bd5 19.Re8 Rfe8 20.Nd6 Re6 21.Bd5 Rdd6 22.Qe8 Bf8 23.Be6 Re6 24.Qe6 Kh8 25.Qb6 cd4 26.Qa6 Ba3 27.Qa5 Bf8 28.Nd4 Kg8 29.Qc7 Bb4 30.Nf5 Bf8 31.Re1 Bd6 32.Qg7 1–0. marekt – uly333, gameknot.com, 2001.

3.d3 c6 4.c4 =.

3.d4 Bb7 4.e3 Nf6 5.Nd2 (5.Nf3 c6=) 5...e6 6.Ngf3 Bb4 7.Bb2 Ne4 8.c4 (8.a3 Bc3 9.Bc3 Nc3=) 8...0–0 (8...Qf6 9.Qe2=+) 9.a3= Bd2 10.Nd2 Nd2 11.Qd2 d6 12.Rc1 White prepares the advance d5 (12.f3 c6+=) 12...Nd7 13.Qc2 (13.f3 e5+=) 13...Qh4= 14.h3 f5 15.d5 e5 Black prepares f4 16.g3 Qh6 17.Bd3 f4 (17...Qg6 18.Qe2=) 18.gf4+= ef4 19.Rg1 (19.e4 Qh5=) 19...Rf7 20.Bf5 Nc5 (worse 20...fe3 21.Be6 Nf6 22.Rg3+–) 21.e4 Bc8 22.Bc8 Rc8 23.Rh1 (better 23.f3!?=+) 23...f3 24.Bd4 (better 24.Kd1!?–/+) 24...Nd3!–+ 25.Qd3? (25.Kd1 Nc1 26.Qc1 Qc1 27.Kc1–+) 25...Qc1 (25...Qc1 26.Qd1 Qc4–+ (26...Qa3?! 27.Kd2–+)) 0–1. Bureau_Leroyer,Lola – Fischer,Julie, ChampionshipFrance Jeunes, 2016.

3.e3 d5 4.Nf3 Nf6 5.c4 dc4 6.Bc4+= h6 (6...e6 7.0–0+=) 7.Bb2 (better 7.0–0+=) 7...Ne4?? (7...e6 8.Nc3+=) 8.0–0 (better 8.Ne5 e6 9.Qf3+–) 8...e6+– 9.d3 (9.Ne5 Nd6+–) 9...Nd6+= 10.Nc3 (10.Na3 Bb7+–) 10...Nc4 11.dc4 Qd1 12.Rad1 Bb7 13.Ne5 Bd6 14.Ne4?? (better 14.Na4+=) 14...Be4–+ 0–1. GuestTGGC – shaanai, freechess.org, 2018.

3.e3 d6 4.Nf3 e5 5.d3 Nf6 6.Be2 Bd7 7.a4 (7.c4 Be7+=) 7...c6 8.c4 d5 (8...Be7 9.0–0=) 9.bc6 (9.Ne5 Bb4 10.Bd2 0–0+/–) 9...Bc6 (9...Nc6 10.d4 e4 11.Ne5=) 10.cd5 (10.Ne5 dc4 11.Bf3 Bf3 12.Qf3 Ra7 13.dc4 Bb4 14.Bd2 Qd6+=) 10...Bd5 (10...Bb4 11.Bd2 Qd5 12.Nc3=) 11.0–0 Be7 (11...Nc6 12.Bb2+=) 12.Nc3 (12.Ne5 Nc6 13.Nc6 Bc6+/–) 12...Bf3 13.Bf3 (worse is 13.gf3 Nc6=) 13...Ra7 14.Nb5 Rd7 15.d4 ed4 (15...e4 16.Bg4 Rd5 17.f3 Ng4 18.fg4+=) 16.Nd4 0–0 17.Qb3 Bc5 18.Bb2 Qc7 (18...Re8 19.Rab1+/–) 19.Rac1 Na6 (19...Qe5 20.Qb5 Bd6 21.g3+/–) 20.Nb5 (20.Nf5 Qd8+/–) 20...Qd8 21.Rfd1 Qe7 22.Rd7 Nd7 23.Qc3 Nf6 24.Rd1 Nb4 25.Nd4 Qe5 26.Nc6 Qc3 27.Bc3 Nc6 28.Bc6 h6 29.Kf1 Nh7 30.Bb5 Rc8 31.Bd4 Nf8 32.Ke2+/– Ne6 33.Be5 Rd8 34.Rd8 Nd8 35.Bc7 Ne6+= 36.Bd7?? Nc7–+ 37.f3 Kf8 38.e4 Ke7 39.Bc6 Bg1 40.h3 Kd6 41.Bb7 Kc5 42.Kd3 Kb4 43.Bc6 Ne6 44.Be8 Nc5 45.Kc2 f6 46.g4 Na4 47.Ba4 Ka4 48.Kb2 Kb4 49.f4 a4 50.e5 fe5 51.fe5 Bd4 (51...Bd4 52.Kc2 Be5–+) 0–1. Fournier,Frederic (1675) – Forsgren, Active, 2006.

3.e3 e6 4.Bb2 Nf6 5.Nf3 Bb7 6.Be2 d5 7.0–0 Nbd7 8.Nd4 Bd6 9.Nc6 Bc6 10.bc6 Ne5 (10...Nc5 11.Nc3+=) 11.f4 Ng6 (11...Nc6? 12.Bb5 Qd7 13.c4+–) 12.Nc3 (12.c4 0–0+=) 12...0–0 (12...Ne7 13.Nb5+=) 13.Nb5+= Ne7 (13...e5 14.g3+=) 14.Bf6 gf6 15.Rc1 Nc6 16.c4 Ne7 17.cd5 Nd5 18.Bc4 c6? (better 18...Ne7!?+=) 19.Bd5+– cd5 (19...ed5 20.Rc6 Bb4 21.Rf3+–) 20.Qh5+– White prepares f5 20...Bb4?? (better 20...Qd7 21.Rf3 Bf4 (21...Qb5?? 22.Rg3 Kh8 23.Qh6 Qf1 24.Kf1 Rg8 25.Qf6 Rg7 26.Qg7) 22.ef4 Rfc8+– (22...Qb5 23.Rg3 Kh8 24.Qh6 Qf1 25.Kf1 Rg8 26.Qf6 Rg7 27.Qg7)) 21.Rf3 Re8 (21...Bd2?? 22.Rg3 Kh8 23.Rh3 Be3 24.Kh1 h6 25.Qh6 Kg8 26.Rg3) 22.Rc7 Qc7 23.Nc7 Kg7 (23...Kf8 24.f5 Ke7 25.fe6 fe6 26.Qh7 Kd6 27.Na8 Ra8 28.Rf6 Bd2 29.Qf7 Be3 30.Kh1+–) 24.f5 Bd2 (24...Rac8 25.Rg3 Kf8 26.Ne6 Re6 27.fe6 Rc1 28.Kf2 Ke7 29.Qd5 Rc7 30.ef7 f5 31.Qe5 Kf7 32.Rg7 Kf8 33.Qc7 Bd2 34.Qe7) 25.fe6 Re6 26.Ne6 fe6 27.Rg3 Kh8 (27...Kf8 28.Qh6 Ke7 29.Rg7 Kd6 30.Qf4 e5 31.Qf6 Kc5 32.Rc7 Kb5 33.Qc6 Ka6 34.a4 Be3 35.Kh1 Rf8 36.Qb5) 28.Qh6 Be3 29.Re3 (29.Re3 Rg8 30.Re6 Rc8 31.Re7 Rc1 32.Qc1 d4 33.Qc8) 1–0. yzerman123 (2255) – decu40 (1925), gameknot.com, 2015.

3.e3 g6 4.Bb2+= Nf6 5.c4 Bg7= 6.Nf3 0–0 7.d4 Bb7 8.Nbd2 d6 9.Be2 Nbd7 10.0–0 c5 11.bc6 Bc6 12.Ng5 h6 13.Bf3 d5= 14.cd5 Bb5=+ 15.Ne6 fe6 16.de6 Bf1 17.Qf1 Rc8 18.ed7 Qd7 19.Nc4 Qb5 20.Rc1 Rc7 21.a4 Qa4= 22.Nb6 Rc1 23.Na4 Rf1 24.Kf1 Rb8 25.Bc3 Rb5 26.Bc6 Rf5 27.e4 Rf4= 28.f3 Ng4 29.Ke2 Nh2 30.Nc5 Rf8 31.Ba5 Rb8 32.Bd5 Kh8 33.Nb3 Rc8 34.Kf2 e5 35.Kg1 Nf3 36.gf3 ed4 37.f4 g5 38.Bd2 gf4 39.Bf4 Rc2 40.e5+/– h5 41.Kf1 d3 42.e6 Bf6 43.Nd2 Kg7 44.Be4 Rc3+= 45.Kf2 Ra3 46.Ke3+– Ra6 47.Bd5+/– Kf8 48.Bc4 Rc6 49.Kd3 Ke7 50.Bd5 Re6 51.Be6 Ke6 ½–½. Gretencord,Ulrich (2015) – Gnuechtel,Andreas (1865), DESC, 2001.

3.e4 c5 4.d4 e6 5.Nf3 Ne7 6.dc5+/– bc5 7.c4 Ng6 (8.Bb2 d6+/–; 7...d5 8.Nbd2+/–). marcosr – colamiju, net–chess.com, 2005.

3.e4 d5 4.ed5 Qd5 5.Nc3 Qe6 6.Nge2 Bd7 7.d4 Qd6 8.Bf4+– Qb4 9.Rb1 Qc4+/– 10.a3 e6? 11.Qd2+– Bd6 12.Bg3 Nf6?? 13.Nf4 Bf4 14.Bf4 Ne4 15.Bc4 Nd2 16.Kd2 c6 17.Na4 cb5 18.Nb6 Ra7 19.Bb8 0–0 20.Ba7 bc4 21.Nd7 (21...Rd8 22.Rb7+–) 1–0. mrkt – kiki74, zagraj.pl, 2006.

3.Nf3 e5 4.Ne5+/– Qf6 5.Bb2 Bc5 6.d4 Bb4 7.Nd2 d6 8.c3 de5 9.cb4 ed4 10.Ne4 c5?? (10...Qd8 11.Bd4 Nf6 12.Nf6 gf6+–) 11.Nf6 (11.Nf6 Nf6 12.bc5 bc5 13.e3+–) 1–0. Janek – ariel, internet, 2016.

3.Nf3 e6 4.Bb2 c6 (4...Bb7 5.e3=) 5.a4 (better is 5.e4+=) 5...Be7?? (better is 5...Nf6=) 6.Bg7+– Bf6 7.Bh8 Bh8 8.c3 (8.d4 Nf6+–) 8...Nf6 (8...Bb7 9.e3+–) 9.e3 Ra7 10.Be2 d5 11.Ne5 (11.d4 c5+–) 11...Bb7 12.Na3 (12.0–0 Ne4 13.f4 Bg7+–) 12...Ne4 13.Nc6 Nc6 14.bc6 Bc6 15.Nb5 Rb7 16.Rc1 Kf8 17.Bd3 (17.d4 Rd7+–) 17...Qh4 The mate threat is Qxf2 18.g3 Qh6 19.Nd4 Be8 (19...Bd7 20.Rb1+–) 20.Bb5 (20.Rb1 e5 21.Nb5 Bd7+–) 20...Bb5 (20...Nc5 21.0–0+–) 21.Nb5 Be5 22.0–0 Nf6 23.f4 Bb8 24.Qf3 White prepares f5 24...Rd7 25.d3 Qg6 26.Qe2 Kg8 27.Nd4 Bd6 28.f5 ef5 29.Nf5 Bf8 30.Rf4 Kh8 31.Nh4 Qg5 32.Qf3 Be7 33.Rf1 Rd6 34.Nf5 Rd7 1–0. Engles,Michael – Lazar,Ferenc, WCCF, 2003.

3.Nf3 g6 4.Nc3 (4.Bb2 Nf6+= A) 5.d4 d5 (5...Bg7 6.e3 d5 7.Bd3 a4 8.Qe2 c5+=; 5...c6 6.e3 Bg7 7.Bd3 d5 8.Na3 0–0+=) 6.e3 Bg7 7.c4 c6 8.Nc3 0–0+=; B) 5.e3 Bg7 (5...d5 6.c4 Bg7 7.cd5 Qd5 8.Nc3 Qf5+=) 6.Be2 0–0 7.0–0 Bb7 8.c4 c5+= 0.58; 4.e4 Bg7 (4...d5 5.ed5 Bg7 6.d4 Qd5 7.c4 Qd6 8.Ba3 Qd8+/–) 5.d4 d6 6.Bd3 Nf6 7.0–0 0–0 8.Re1 c5+/–) 4...Bg7 (4...d5 A) 5.e3 Bg7 (5...Nf6 6.Be2 Bg7 7.0–0 0–0 8.Re1 Qd6=) 6.Bb2 Bb7 7.d4 Nf6 8.Bd3 0–0=; B) 5.d4 Nf6 6.g3 Ne4 7.Ne4 de4 8.Ng5 f5=) 5.Bb2 (5.e4 d5 6.ed5 Bb7 (6...Nf6+= 7.Bc4 Bb7 8.d4 Nd5+/–) 7.d4 Nf6 8.Bc4 Nd5+/–) 5...c6 (5...d5 6.e3+= Bb7 7.a4 Nh6 8.d4 c5+=; 5...Nf6 6.Nd5 0–0 7.Nf6 ef6 8.e3 c5+=) 6.e4+/– (6.e3 Nh6 7.h4 Bb7 8.h5 Nf5+/–) 6...cb5 (6...Nf6 7.Bd3+= Nh5 8.0–0 Nf4+=) 7.Bb5 a4 (7...Nf6!? 8.Rb1 (8.e5 Ng4+/–) 8...Bb7+/–) 8.0–0+– (8.Na4 Bb2+– 1.45) 8...a3 9.Bc1 Nh6 10.d4 Na6 (10...Nc6 11.Rb1+–) 11.Bc4 (worse is 11.Ba3 Nc7 12.Bb4 Nb5 13.Nb5 0–0+/–) 11...e6 (11...0–0 12.Rb1+–) 12.Rb1 (better is 12.Ba3 Bf8 13.Qc1 Ba3 14.Qa3+– (14.Qh6?! Bb7+–)) 12...b5? (12...0–0+–) 13.Nb5 (worse is 13.Bb5 Nc7+–) 13...Bb7 (13...0–0 14.Ba3 d5+–) 14.Nd6 (14.Nd6 Kf8 15.Nb7+–) 1–0. pierre – stfizt, internet, 2010.

3.g4 e5 4.Bg2 c6 5.Bb2 Bd6 (5...f6 6.g5=) 6.c4 (better 6.d4+=) 6...c5?? (better 6...Bb7=) 7.Ba8+– Nf6 (7...Bc7 8.Nf3 d6 9.g5+–) 8.h3 (8.g5 Nh5+–) 8...Qc7 9.Nf3 (9.d3 0–0+–) 9...Bb7 (9...Qa7 10.Bd5 Nd5 11.cd5+–) 10.Bb7 Qb7 11.0–0 0–0 (11...Qc7 12.Qb3+–) 12.d3 (12.Ne5 Re8 13.f4 Ne4+–) 12...e4 13.Ng5 (better 13.Nh4 Re8+–) 13...Bf4 (13...Be7 14.Ne4 Ne4 15.de4 Qe4 16.Nc3 Qc4 17.Nd5+–) 14.h4 (better 14.Bf6 gf6 15.Ne4+–) 14...Ng4 15.Ne4 (better 15.e3!? Bh2 16.Kh1 ed3 17.Qf3 Qf3 18.Nf3 Bc7+–) 15...Bh2 16.Kg2 Be5 (16...f5 17.Kh3 Qc7+–) 17.Be5 Ne5 18.f3 (18.Kg1 f5 19.Nec3 Rf6+–) 18...d6 (18...Ng6 19.Nbc3 f5 20.Nd2+–) 19.Nd6 Qe7 20.Nf5 (20.Ne4!? Ng6 21.Rh1 Qe5+–) 20...Qf6 21.e4 Qg6 (21...g6 22.f4 Nd3 23.Qd3 Qa1 24.Ne7 Kg7+–) 22.Kf2 Qh5 (22...Qe6 23.f4 g6 24.fe5 gf5+–) 23.Rg1 g6 (23...Rd8 24.Rg7 Kf8 25.Rg5 Rd3 26.Nd2+–) 24.Rg5 Qf3 (24...Qg5 25.hg5 gf5 26.Nc3+–) 25.Qf3 Nf3 26.Kf3 Nd7 (26...f6 27.Rg3+–) 27.Kf4 (27.Ne7 Kg7 28.Rd5 Nf6+–) 27...Nf6 (27...f6 28.Rg3+–) 28.Ng3 (better 28.Ne7 Kg7+–) 28...h6 29.Re5 h5 (29...Rd8 30.Nc3 Rd3 31.Nd5 Nd5 32.Rd5+–) 30.Re7 (30.Nc3 Rb8+–) 30...Rb8 (30...Rd8 31.Rb7 Rd3 32.Rb6+–) 31.Nd2 (31.e5!? Ne8+–) 31...Kf8 32.Rc7 Kg7 (32...Ng4 33.Nf3 Re8 34.Rb7+–) 33.Ndf1 (33.e5 Ng4+–) 33...Ng4 (33...Rd8 34.e5 Rd4 35.Ne4+–) 34.Rd1 (34.Ne3 Nf2 35.Rf1 Nd3 36.Kg5 Rf8+–) 34...Rf8 (34...Rd8 35.Rc6+–) 35.d4 Nf2 (35...cd4 36.Rd4 Re8 37.Rd6+–) 36.Rd2 Nh3 37.Ke3 cd4 38.Kd4 (38.Rd4 Re8+–) 38...Nf4 39.Rb7 Rd8 40.Ke3 Rd2 1–0. Delboy Smith (1700) – Snakebit Sal, ChessWorld.net, 2020.

3.h4 d5 4.h5 f5 5.Nf3 h6 6.Bb2 e6 7.e3 a4 8.Ne5 a3 9.Bd4 Qd6? (9...Bd6 10.Ng6) 10.Ng6 Rh7 11.Be5 Qd8 12.Nf8 Kf8 13.Qf3 Ra7 14.d4 Qe7 15.g4 Qb4 16.Nd2 Qb2 17.Nb3 Qc2 18.gf5 Qc3 19.Kd1 Ke7 20.fe6 Be6 21.Rc1 Qb4 22.Bd3 Nd7 23.Bh7 Ne5 24.Qg3 Bg4 25.Kc2 Qb5 26.Qe5 Kf7 27.Bg6 Kf8 28.Qf4 Nf6 29.f3 Qe2 30.Nd2 Be6 31.Bd3 Qg2 32.Rcg1 Qf2 33.Rf1 Qg2 34.Rhg1 Qh3 35.Qe5 Bg8 36.Rg7 Kg7 37.Rg1 Kf8 38.Qf6 Bf7 39.Qd8 Be8 40.Rg8 Kg8 41.Qe8 Kg7 42.Qe7 Kg8 43.Bh7 1–0. Wall,Bill – Marishka, FICS, 2012.

3.h4 Nf6 4.Nf3 e6 5.h5 Nd5 6.e4 Nf4? 7.g3+– Nh5 8.Rh5 g6 9.Bb2 f6 10.Rh1 Bb4 11.e5 f5 12.a3 Bc5 13.d4 Be7 14.d5 Bb7 15.Nc3 c6 16.bc6 Ba6 17.d6 Bf8 18.c7 Qc8 19.Ng5 h6 20.Nd5 h5 21.Nf6# 1–0. pierre (2005) – jordan2delta, internet, 2006.

3.a4 Bb7

4.Bb2 c5 5.e3 d5 6.Nf3 e6 7.c4 Nf6 8.Be2 Be7 9.0–0 0–0 10.d4 Nbd7 11.Nbd2 Rc8 12.Rc1 cd4 13.Bd4 Nc5 14.Ne5 Bd6 15.Ndf3 dc4 16.Nc4 Bd5 (16...Be7 17.Nfe5=) 17.Nfe5 (17.Bf6 gf6 18.Nd6 Qd6+=) 17...Be5 (17...Be7 18.Bf3=) 18.Be5 Bc4 (18...Nfe4 19.Bf3+=) 19.Rc4 Qd1 20.Rd1 Nfd7 21.Bd6 Rfd8 22.h3 ½–½. Van Esbroeck,Dirk – Wartig,Wolfgang, corr SOK–92–88, 1992.

4.Bb2 c5 5.e3 d6 6.Nf3 Nd7 7.c4 Ngf6 8.Be2 g6 9.0–0 Bg7 10.d4 Ne4 11.Nbd2 Ndf6 12.Ne4 Ne4 13.Nd2 Nd2 14.Qd2 0–0 15.dc5 (15.Rad1 cd4 16.Bd4 Bd4 17.ed4 Rc8+=) 15...dc5= 16.Qc2 Bb2 17.Qb2 Qc7 18.Rad1 Rad8 19.Rd2 Rd2 Black launches an attack 20.Qd2 Rd8 21.Qc3 Qd6 22.h3 Qd2 23.Qd2 (better 23.Qe5!? Qe2 24.Qe7=) 23...Rd2–/+ 24.Re1 Ra2 25.Bd1 Ra1 26.Kf1 Be4 27.Bb3?? (better 27.Bf3 Bd3 28.Be2 Be2 29.Ke2 Ra4 30.Rd1–/+) 27...Bd3–+ 28.Kg1 Re1 29.Kh2 Re2 (better 29...Rb1 30.Ba2 Rb2 31.Bb1 Rb1 32.Kg3–+) 30.Kg3 e5 31.Bd1 Rd2 32.Bf3 Kg7 (32...e4 33.Be4 Be4 34.h4–+) 33.Bg4 (33.Bd5 Ra2 34.f4 Ra4 35.fe5 Bc4–+) 33...f5 34.Bf3 e4 35.Bh5 (35.Be4 fe4 36.f3 ef3 37.Kf3 Bc4–+) 35...gh5 36.Kf4 Kf6 (36...Rf2 37.Kg3 Rf1 38.Kh4 f4 39.Kh5 fe3 40.Kg4 e2 41.Kg5 e1Q 42.g4 Qe3 43.Kh4 Kg6 44.g5 Qg5) 37.f3 (37.f3 Rg2 38.h4 ef3 39.e4 fe4 40.Ke3 f2 41.Kd2 f1Q 42.Kc3 Qe1 43.Kb3 Qb4) 1–0. BeepBeepImAJeep (2545) – ENERGIE73 (1945), lichess.org, 2016.

4.Bb2 c5 5.e3 Nf6 6.Nf3 e6 7.Be2 d5 8.0–0 Nbd7 9.c4 Bd6 10.d4 Qc7 11.dc5 (11.cd5 Nd5 12.Nbd2 0–0=) 11...Nc5 12.Re1 (12.cd5 Bd5 13.Nbd2 Ng4=) 12...Nfe4 (12...dc4 13.Bf6 gf6 14.Qc2–/+) 13.Nbd2 (13.cd5 Bd5 14.Qc1 0–0=+) 13...0–0 (13...Nd2!? 14.Nd2 Bh2 15.Kh1 Rd8–/+) 14.h3 Rfd8 Black is in command 15.Ne4 (15.Rc1 Rac8=+) 15...de4–/+ (worse 15...Ne4 16.Qd4 f6 17.cd5 Bd5 18.Rac1–/+) 16.Nd4 (16.Nd2 Rac8–/+) 16...Bh2 17.Kh1 e5 18.Kh2 (18.Ne6!? Ne6 19.Qc2–/+) 18...ed4–+ 19.Kg1 (19.g3 de3 20.Qc1 ef2–+) 19...de3 20.Qc2?? (20.Qc1 ef2 21.Kf2–+) 20...ef2 21.Kf2 Qf4 (better 21...e3 22.Kg1 Qg3 23.Bf1–+) 22.Kg1 Qg3 (22...e3 23.Bf3 Rd2 24.Be5 Qf3 25.Qd2 ed2 26.gf3 de1R 27.Re1 Bf3 28.Bd4 Na4 29.Kf2–+) 23.Rf1?? (better 23.Bf1–+) 23...e3 24.Bf3 (24.Rf3 Bf3 25.Bf3–+) 24...Rd2 25.Qc3 (25.Qd2 ed2 26.Bb7 Qe3 27.Kh2 Nb7 28.Kh1–+) 25...Rg2 26.Bg2 Qg2 0–1. Markzela (1695) – Ralinho (2310), lichess.org, 2020.

4.Bb2 c5 5.Nf3 d5 6.e3 f6 7.Be2 e5 8.0–0 Ne7 (8...Bd6 9.d4 cd4 10.ed4=) 9.Ne1 (9.d4 cd4 10.ed4 e4+=) 9...Ng6 (9...Qd6 10.d4=) 10.Bh5 Be7 (10...Bd6 11.Qg4=) 11.f4 (11.Qg4 0–0+=) 11...0–0 (11...ef4!? 12.ef4 0–0+=) 12.Bg6+– hg6 13.f5 (13.fe5!? fe5 14.Rf8 Qf8 15.Be5+–) 13...g5 (13...gf5 14.Rf5 Qd7 15.Qh5=+) 14.Nc3 d4 15.Ne2 Qe8 16.Nd3 Qh5 17.Ng3 Qd1 18.Rad1 Kf7 19.h3 Rh8 20.Nf2 Nd7 21.Ng4 Rh7 22.ed4 (22.c4!?=) 22...cd4–/+ 23.c3 Bc5 (better 23...d3–/+) 24.Kh1?? (better 24.cd4 ed4 25.d3=) 24...Rah8 (better 24...Rh3! 25.Kg1 Rg3 26.Rf2 Rg4 27.cd4 Bd4 28.Bd4 Rd4 29.Ra1–+) 25.cd4?? (25.Kh2 Rh4 26.cd4 Bd4 27.Bd4 Rg4–+ (27...ed4?! 28.Kg1=+)) 25...ed4 (better 25...Rh3 26.Kg1 Rg3 27.Ne3 ed4 28.Bd4 Bd4 29.Rf2–+) 26.Rde1?? (26.Kh2!? Rh4 27.Nf2 g4–+) 26...Rh4 (better 26...Rh3 27.Kg1 Rg3–+) 27.Nh2?? (better 27.Kg1 d3 28.Rf2 Rh3 29.gh3 Rh3 30.Re3 Be3 31.Ne3 Rg3 32.Kh2–+) 27…Rh3 (27...Rh3 28.Kg1 d3 29.Rf2 Rg3–+) 0–1. Akrapovik (1685) – Sergch (1725), lichess.org, 2021.

4.Bb2 c6 5.c4 d5 6.e3 Nf6 7.Nf3 Ne4 (7...e6 8.Nc3=) 8.d3 Qd6?? (better 8...Nf6=) 9.de4+– Qb4 (9...de4 10.Qd6 ed6+–) 10.Bc3 Qd6 11.ed5 (11.ed5 cd5 12.Ra2+–) 1–0. GuestJHKK – Suza, freechess.org, 2017.

4.Bb2 c6 5.e3 cb5 6.ab5 d6 7.Nf3 Nd7 8.Be2 Rc8 9.0–0 Ngf6 10.c4 g6 (10...Bf3 11.Bf3 Rc4 12.Bc6+=) 11.d4 (11.d3!?+–) 11...Bg7= 12.Nbd2 0–0 13.Rc1 Rc7 14.Qb3 Qa8 15.h3 Rfc8 16.Rfd1 Ne4 17.Ne4 Be4 18.d5 (18.Ne1 a4 19.Qa3 Ra7=) 18...Nc5 Black prepares the advance a4 (18...Bf3 19.gf3 a4 20.Qa3=+) 19.Qa2= Bb2 20.Qb2 Bf3 21.Bf3 a4 22.Rc3 Ra7 Black prepares a3 23.Be2 a3 24.Qa2 Qb7 (24...Ne4 25.Rc2=) 25.Ra1 (better 25.Ra3!? Rca8 26.Ra7 Qa7 27.Qa7 Ra7 28.g3+–) 25...Rca8= 26.Qb1 Ra5 (26...a2 27.Qc2=+) 27.Qb4 (27.Ra2 Na4 28.Rc1 Nc5=) 27...Qa7 (27...a2 28.Rc2=+) 28.Ra2= Ra4 29.Qb1 Qa5 30.Qc1 Qb4 31.f3 (31.Bf3 R8a7=) 31...h5 (31...R8a7 32.g3=+) 32.h4 R4a5 33.Kf2 (33.g3 Nb3 34.Qc2 Nc5=) 33...Nb3 (33...Kg7 34.Kg1=+) 34.Qc2= Nc5 35.Qc1 Ra4 36.Kg1 Qa5 (36...R8a7 37.g3=) 37.Kf2 (better 37.Bd1!? Nd3 38.Qd2 (38.Rd3?! Qe1 39.Kh2 Qh4 40.Kg1 Qe1 41.Kh2 Qh4 42.Kg1 Qe1 43.Kh2 Qh4=) 38...Rc4 39.Rd3 (39.Rc4?! Qd2 40.Rd2 a2=) 39...Qd2 40.Rdd2+– (40.Rad2? a2 41.Ra2 Ra2–+)) 37...Qa7 38.Qc2 e6 39.de6 Ne6 40.Qc1 Nc5 41.Bd1 Qe7? (better 41...Ra5=) 42.e4?? (better 42.Ba4 Qh4 43.Kg1 Ra4 44.Raa3+–) 42...Qh4 43.Kg1 Qe1 44.Kh2 R4a5 45.Re3 Qh4 46.Kg1 Qg5 47.Qc3 Qe5 48.Qe5 (better 48.Qd2!?–/+) 48...de5–+ 49.Kf2 h4 50.Ke1 Kg7 51.Bc2 Kf6 52.Kd2 Kg5 53.Ke2 Kf4 54.Kf2 Rd8 55.Re2 (55.Ke2–+) 55...Rd4 56.Bb1 (56.Re3 Rd2 (worse 56...Rc4 57.Bd1–+) 57.Re2 Re2 58.Ke2 Kg3–+) 56...g5 (56...Rc4 57.Bc2–+) 57.Re1 (57.Re3 g4 58.fg4 Rd1–+ (58...Ne4?! 59.Be4 Re4 60.Rea3 Ra3 61.Ra3–+)) 57...Rc4 58.Rg1 Rb4 59.g3 hg3 60.Rg3 The mate threat is Rg4 60...f5! 61.ef5 (61.Bc2 Rd4 62.Rg1 Rd2 63.Kf1 fe4 64.Rg4 Kf3 65.Rg5–+) 61...Rb1 Annihilates a defender: b1 62.Rg4 Kf5 63.Ra4 (63.Rg2–+) 63…Ra4 (63...Ra4 64.Ke3 Rb2 65.Rb2 ab2 66.Kf2 b1Q 67.Kg2 Ra2 68.Kg3 Qe1 69.Kh3 Qh4) 0–1. BeepBeepImAJeep (2710) – enmQ (2825), lichess.org, 2019.

4.Bb2 c6 5.e3 cb5 6.ab5 Nf6 7.Nf3 Nd5 8.c4 Nc7 9.Be2 Ne6 (9...d5!?+=) 10.Nc3+– Nc5 11.0–0 d6 (11...e6 12.d4 Ne4 13.Ne4 Be4 14.d5+–) 12.d4 Ne4 13.d5 Nc5 14.Qc2 (14.Nd4 e5 15.de6 fe6 16.Bh5 Ke7+–) 14...Nbd7 15.Nd4 Ne5 (15...e6 16.Nc6 Qh4 17.Rfd1+–) 16.f4 Ng6 (16...Ned7 17.Nc6 Qc7 18.e4+–) 17.Nc6 Qc7 18.Ne4 Nh4? Black prepares a4 (18...Bc6 19.bc6 e6 20.Nc5 bc5 21.Bg4+–) 19.Ng5 (19.Nc5 dc5 20.f5 Bc6 21.dc6 Rd8+–) 19...Ng6? (19...h6 20.Ne4 e6 21.Nc5 bc5 22.Bh5 Bc6 23.bc6+–) 20.Rf3 (20.Qf5 e6 21.de6 fe6 22.Ne6 Qd7 23.Ng7 Bg7 24.Qd7 Kd7 25.Bg7 Rhg8+–) 20...a4 (20...e6!?+–) 21.Rh3+– h6 (21...Bc8 22.Rh7 Rh7 23.Nh7+–) 22.Nf3 (22.Ne6! Qc8 23.Bg4 Rg8+–) 22...Bc8 (22...Rg8 23.Nh4 Bc8 24.Ng6 Bh3 25.gh3+–) 23.Rg3 e6 24.h4 (24.de6!? Ne7 25.ef7 Kf7+–) 24...e5 (24...Ne7!? 25.e4 Ng6+=) 25.h5 ef4 26.ef4 Nf4 27.Bg7?? (27.Nh4 f5 28.Rf3+–) 27...Bg7 (27...Rg8!? 28.Bh6 Rg3 29.Bf4 Rg4+=) 28.Rg7= Nh5 29.Re1?? (better 29.Rh7 Rg8 30.Ng5+–) 29...Ng7–+ 30.Bd3 Kf8 31.Re7 Qe7 32.Ne7 Ke7 33.Bf5 (33.Nd4–+) 33...Nf5 34.Nh2 (34.Qe2 Kd7 35.Qc2 Ne3–+) 34...Bd7 (34...a3 35.Qe2 Ne3 36.Qe3 Kf8 37.Qe1–+) 35.Qc3 (35.Qe2 Kd8 36.Ng4 Re8–+) 35...Rhg8 36.Nf3 Ng3 (better 36...a3!? 37.Ne1–+) 37.Nh4 (37.Qe3 Nge4 38.Nd2–+) 37…Ne2 (37...Ne2 38.Kf2 Nc3–+) 0–1. AhmedSultanov (1835) – Jaddy1130 (1835), lichess.org, 2019.

4.Bb2 c6 5.e3 Qc7 6.Nf3 f6 7.d4 (7.Nc3 Nh6+–) 7...d5 (7...e6 8.Bd3+–) 8.Bd3 (8.c4 e6+–) 8...Nd7 (8...e6 9.0–0+–) 9.0–0 (better 9.bc6 Bc6 10.c4+–) 9...0–0–0? (better 9...cb5 10.Bb5 Bc6+–) 10.bc6+– Bc6 11.Nc3 (better 11.c4 dc4 12.Bc4+–) 11...Bb7?? (11...e5+–) 12.Nb5 Qb8 13.c4 e6 (13...Ba6 14.Rc1 Bb5 15.cd5 Kb7 16.Bb5+–) 14.Rc1 Ne7 (14...Re8 15.cd5 Kd8 16.de6 Re6+–) 15.cd5 Nc5 16.dc5 Rd5 17.cb6 Kd8 18.e4 Rd7 19.Nfd4 e5 20.Ne6 Ke8 21.Nec7 Kf7 22.Bc4 Kg6 23.Qg4 Kh6 24.Rc3 (24.Bf7 g6 25.Ne6 Nf5 26.Qh3 Nh4 27.Qh4) 24...g5 25.Rh3 (25.Qh5 Kh5 26.Bf7 Kg4 27.Rg3 Kf4 28.Nc3 Be4 29.Be6 Bg2 30.Ne2 Ke4 31.Re3) 25...Kg6 26.Qh5 Kg7 27.Qf7 (27.Qh6) 1–0. DEFFM – hostmark, freechess.org, 2019.

4.c3 d5 5.Bb2 (5.Nf3 Nf6=) 5...Nf6 (5...e5 6.Nf3+=) 6.d4 (6.Nf3 e6=) 6...e6 7.e3 Nbd7 (7...c5 8.Nf3=) 8.Nf3 Be7 9.Bd3 Rc8 10.Nbd2 c5 11.0–0 c4 (11...Bd6 12.Ba3=) 12.Bc2 0–0 13.Qe2 g6 (13...Re8 14.Rfe1=) 14.Rfe1 Re8 15.e4 Bf8 (15...de4 16.Ne4 Ne4 17.Be4=) 16.e5+= Nh5 17.Nf1 Ng7 (17...Bh6 18.Ne3+=) 18.Bc1 Be7 19.Ne3 Nf8 20.Ng4 f5?? (better is 20...Nf5+/–) 21.ef6! Bf6 (21...Bf6 22.Nh6 Combination) 22.Nge5 (better is 22.Nh6 Kh8 23.Nf7 Kg8 24.Nd8 Rcd8 25.Ne5+–) 22...Be5 (22...Nd7 23.Nd7 Qd7 24.Bf4+/–) 23.Ne5 Qf6 (23...Nd7 24.Qg4+/–) 24.Qf3 (24.Ng4 Qe7 25.Ba3 Qg5+–) 24...Nf5? (24...Qf3 25.Nf3 (25.gf3?! Rc7+=) 25...Nd7 26.Ba3+–) 25.Bf5?? (better is 25.g4+–) 25...Qf5 (25...ef5 26.Qg3+/–) 26.Qf5 (26.Bf4!? g5 27.Bg5 Qf3 28.Nf3+– (worse is 28.gf3 Rc7+/–)) 26...ef5+/– 27.Bf4 (27.Ba3 Rcd8+=) 27...Rcd8 28.Bg5 Rc8 29.f4 Kg7 30.Bh4 h6 31.Bf2 (31.Re3 Re6+=) 31...Red8 (31...Ne6 32.Bg3=) 32.g3 (32.Re2 Rc7+=) 32...Nd7 (32...Re8!?+=) 33.Nd7+/– Rd7 34.Re5 (34.Re6 Rf8+/–) 34...Rcd8 (34...Rf8 35.Rae1+=) 35.Rae1 (35.Re6 Rf8+/–) 35...Kf7 0–1. Fournier,Frederic – Guest2961385, Partie amicale, 1m + 0s, 2008.

4.Nc3 e5 (4...Nf6 5.Nf3=) 5.e4 (5.Nf3 e4 6.Nd4 Nf6=) 5...d6 (5...Nf6 6.Nf3=) 6.Bb2 (6.Bc4!?+=) 6...Nf6= 7.d3 (7.Nf3 Ne4 8.Ne4 Be4+=) 7...g6 (7...Nbd7 8.Nf3+=) 8.Be2 Bg7 (8...Nbd7 9.h4+=) 9.Nf3 (9.h4 Nbd7=) 9...0–0+= 10.0–0 Nbd7 11.Ba3 (11.Nd2 Nc5+=) 11...Ne8 (11...Nc5 12.Qd2+=) 12.Rc1 (12.Qb1 Nc5=) 12...f5 (12...Qe7 13.Nd5 Bd5 14.ed5=) 13.ef5 (13.Qd2 Nc5+=) 13...gf5 (better is 13...Rf5 14.Nd2 Nef6=) 14.h3 (14.Qe1 Qf6 15.Nd1 e4+=) 14...Kh8 (better is 14...e4!? 15.d4 Kh8–/+) 15.Na2 (15.Qd2 Qf6 16.Nd1 Nc5+=) 15...Bh6+= 16.Rb1 (16.Ra1 Rg8+=) 16...Rg8 17.Bb2 (17.Kh1 Ng7 18.Bc1 Bc1 19.Rc1 Ne6–+) 17...Nef6 (17...Ng7 18.c4–/+) 18.Re1 (18.Nc3 Qe7 19.Nh4 Ne4 20.Ne4 Qh4–+ (20...fe4?! 21.Nf5 Qf8 22.Bg4=)) 18...Qf8 (18...Nh5 19.Kh2 Nf4–/+) 19.Bc1? (better is 19.Nh4=) 19...Bc1 20.Qc1?? (20.Rc1 Qh6 21.Nh4 Rg2 22.Ng2 Qh3 23.Bf1–+) 20...Qg7 21.g3 (21.Nh4 f4 22.Qd1 Qg5–+) 21...f4 22.Kf1 (22.Kh1 fg3 23.Rg1 Nh5 24.fg3 Ng3 25.Kh2 Ne2 26.Rg7 Nc1 (26...Kg7?! 27.Qe3 Nf4 28.Ng5=) 27.Rg8 Rg8 28.Rc1 Bf3–+) 22...fg3 23.fg3 (23.Qg5 Qf7 24.Qf5 Qa2 25.Ra1–+) 23...Qg3 0–1. mic (2195) – gtan (2280), net–chess.com, 2007.

4.c4 e5 5.Nc3 g6 (5...Nf6 6.Nf3=) 6.Bb2 d6 7.e4 Nd7 8.d4 (8.Nf3 Ngf6 9.Bd3 Nc5=) 8...Bg7 (8...ed4 9.Nd5 Bg7 10.Nf3–/+) 9.d5 (9.Nf3!?=) 9...Nc5 10.Nf3 Ne7 (10...Nf6 11.Bd3+=) 11.Be2= f5 12.Qc2 0–0 13.0–0–0 (better is 13.0–0!?=) 13...Qd7 14.Nd2 fe4 15.Nce4 Nd5?? (better is 15...Nf5–/+) 16.cd5+– Bd5 17.Nc5 bc5 18.f3 (18.Ne4!? Be4 19.Qe4 Rae8+–) 18...Qe6 19.Nc4 Kh8 (19...Rf7 20.Kb1+/–) 20.Rd5 (20.b6!? cb6 21.Rd5 Qd5 22.Nb6 Qb7 23.Na8 Ra8+–) 20...Qd5 21.Ne3?? (better is 21.Rd1 Qe6 22.Qe4+/–) 21...Bh6–+ 22.Qd2 Qb3 23.Bc4? (23.Bc3 Qa4 24.g3 Qa3 25.Kc2 Be3 26.Qe3 Qa4 27.Kc1+=) 23...Qe3–+ 24.Qe3 Be3 25.Kc2 Bd4 26.Bd4 (26.Bc1–+) 26...ed4 (worse is 26...cd4 27.Kd3–+) 27.Kd3 (27.h4 Rae8–+) 27...Rfe8 28.Bd5 (28.Rb1 Rad8 29.b6 cb6 30.Rb6 d5–+) 28...Re3 29.Kd2 Rae8 30.Be4 (30.g4 Kg7 31.h4 R8e5–+) 30...d5! 31.Bd5 Re2 32.Kd3 (32.Kc1 Rg2 33.f4–+) 32...R8e3 0–1. Baer,Cy (1895) – Cuttica,Gerardo Axel (2200), CiF, 2007.

4.c4 e6 5.Bb2 Nf6 6.e3 Be7 7.Nf3 0–0 8.Be2 d5 9.0–0 Nbd7 10.d4 dc4 11.Bc4 Bd5 (11...Rc8 12.Nc3=) 12.Bd3 (12.Bd5 Nd5 13.e4 Nb4+=) 12...Ne4 (12...c5 13.bc6 Bc6 14.Nc3=) 13.Nc3 Nc3 14.Bc3 Nf6 (14...c5 15.e4 Bb7 16.Qe2=) 15.Ne5 Ne4 16.Qc2 f5 17.Bb2 Ng5 (17...Bd6 18.f3 Be5 19.fe4 fe4 20.Rf8 (worse is 20.Be4 Bh2 21.Kh2 Qh4 22.Kg1 Be4–/+) 20...Kf8 21.de5 ed3 22.Qd3=) 18.Rac1 (18.Nc6 Bc6 19.Qc6 Bd6+/–) 18...Bd6 19.f4 (19.f3 Be5 20.de5 Rc8+/–) 19...Ne4+= 20.h3 (20.Be2 Qh4+=) 20...Ng3 21.Rfd1 Rc8 22.Nc6 Qe8 23.Qf2 Ne4 24.Qc2 (24.Be4 fe4 25.Rf1 Bb3+=) 24...Nf6 25.Ne5 Be4 (25...Ne4 26.Bc4=) 26.Be4+= Ne4 27.d5 (27.Nc6 Qg6+=) 27...Nc5 28.de6 Qe6 29.Bd4 Nb3 (29...Rfe8 30.Qc4+=) 30.Qc4+= Qc4 31.Rc4 Nc5 (31...Rfe8 32.Kf2+/–) 32.g4 Rb8 33.Bc5 Bc5 34.Rd3 (34.Kf2 fg4 35.hg4 Rbd8 36.Rd8 Rd8+/–) 34...Rbd8 35.Rcc3 (35.Kf2 Rd6+/–) 35...Rd3 36.Rd3 Bd6 (36...fg4 37.Nd7 Rf5 38.Nc5 Rc5 39.hg4+=) 37.Nc4+/– Rd8 (better is 37...Bc5!? 38.gf5 Rf5+/–) 38.gf5+– Be7 (38...Kf7 39.Kg2+–) 39.Rd8 Bd8 40.Kg2 Kf7 41.Kg3 Kf6 (41...Bf6 42.e4+–) 42.e4 Be7 43.Kg4 Bb4 (43...Bc5 44.e5 Kf7 45.Nd2+–) 44.Ne3 (44.Ne3 Ke7 45.Nd5 Kd6 46.f6 gf6 47.Nf6+–) 1–0. Rajala,Olavi – Pesch,K, corr ICCF, 1975.

4.c4 Nf6 5.Bb2 g6 (5...e6 6.Nc3+=) 6.Bf6 ef6 7.Nc3 Bg7 8.d4 0–0 9.e3 Re8 10.Nf3 f5 11.Be2 f4 12.0–0 fe3 13.fe3 d6 (13...Re3 14.Qd2 Bh6 15.Qb2+=) 14.Qd2= Bh6 15.Nd1 Nd7 16.Ra3 Nf6 17.d5 Ne4 18.Qe1 Qf6 19.Nd4 (19.Nd2!? Qe5 20.Ne4 Qe4 21.Qg3=) 19...Be3+= 20.Re3 (20.Re3 Qd4 Remove defender; 20.Ne3 Qd4 Remove defender) 20...Qd4 21.Rf4 g5 22.Rfe4? (better is 22.Rf5 Bc8 23.Rf1–/+) 22...Re4–+ 23.Qg3 (23.Bd3 Re5 24.Qd2–+) 23...Rae8 24.Kf2 h6 25.Qh3 (25.Bh5 Qc4 26.h4 Qd5 27.hg5 Qg5 28.Qg5 hg5–+) 25...Bc8 (better is 25...Re3 26.Ne3 f5 27.Ke1 Qe3 28.Qe3 Re3 29.Kd2–+) 26.Qh6 Rf4 (26...Re3?! 27.Qg5 Kf8 28.Qh6 Ke7 29.Qe3 Qe5 30.Bd3+=) 27.Bf3 (27.Ke1 Re3 28.Qg5 Kf8 29.Qh6 Ke8 30.Qf4 Re2 31.Ke2 Qf4 32.Ne3–+) 27...Qd2 28.Kg3 (28.Kg1 Re3 29.Qg5 Kf8 30.Qh6 Ke7 31.Qg5 f6 32.Qg7 Kd8 33.Ne3 Qe3 34.Kf1 Rf3 35.gf3 Bh3 36.Qg2 Qf3 37.Ke1 Bg2 38.Kd2 Qf2 39.Kd3 Qe1 40.Kc2 Be4 41.Kb2 Qb4 42.Ka2 Qd2 43.Ka1 Qc2 44.c5 Qb1) 28...Rg4! (28...Re3?! 29.Qg5 Kf8 30.Ne3=) 29.Bg4 (29.Kh3 Re3 30.Qg5 Rg5 31.Kh4 Ree5 32.h3 Qe1 33.Nf2 Qf2 34.g3 Qg3) 29...Re3 30.Ne3 (30.Bf3 Re2 31.Qh7 Kh7 32.Be4 Re4 33.c5 Qf4) 30...Qe3 31.Bf3 Qe1 0–1. Baer,Cy (1895) – Gnuechtel,Andreas (2245), CiF, 2007.

4.d4 Nf6 5.c4 (5.Ba3 g6+=) 5...e6 6.Bg5 (6.Nc3!?+=) 6...Bb4–/+ 7.Bd2 Ne4 8.Bb4 ab4 9.Nf3 c5 10.d5? (better is 10.Nbd2 Nc3 11.Qb3–/+) 10...ed5–+ 11.e3 (11.cd5 Qf6 12.Ra2 Qd6–+) 11...Qf6 12.Nbd2 0–0 (12...Nc3 13.Qc1–+) 13.Ne4 de4 14.Nd2 d5 15.Be2 d4 16.0–0 Nd7 17.f4 (17.a5 ba5 18.ed4 cd4–+) 17...Qe6 (17...de3?! 18.Nb3 Rfd8 19.Qc1–/+) 18.ed4 (18.Qc1 d3 (18...de3?! 19.Nb3–/+) 19.Bd1 Ra7–+) 18...cd4 19.f5 (19.Re1 Qd6 20.Nb3 d3–+) 19...Qe5 20.Nb3 (20.c5 Nc5 21.Nc4 Qf6 22.Nb6 Qb6 23.Qd4 Rfd8–+) 20...d3 21.Bg4 Nf6 22.Bh3 (22.a5 e3 23.Re1 d2 24.Nd2 Qb2–+) 22...Rfd8 23.Qd2 (23.c5 e3 24.c6–+) 23...e3 24.Qb4 (24.Rae1 e2 25.Rf4 Ne4 26.Re4 Qe4–+) 24...d2 25.Rab1 (25.Nd2 ed2 26.Qb3–+) 25...e2 26.Nd2 Qe3 0–1. Baer,Cy (1895) – Gnuechtel,Andreas (2245), CiF, 2007.

4.e3 d6 5.Nf3 e5 6.d3 Be7 7.c4 h6 8.Nbd2 Nd7 9.Nb3 Ngf6 10.e4 Nh7 11.Be2 0–0 12.0–0 f5 13.ef5 Rf5 14.Nfd2 Rf8 15.Bf3 Bf3 16.Nf3 Qe8 17.Be3 Qf7 18.Ne1 Ng5 19.Nd2 Ne6 20.Nb3 Qg6 21.Ra2 h5 22.f3 Nf4 23.g3 (better is 23.d4=) 23...Bg5 (23...h4 24.Bf4 ef4 25.g4+=) 24.Kh1?? (better is 24.gf4 Bf4 25.Kf2 Bh2 26.Rh1 Bg3 27.Ke2+/–) 24...Ne6 25.Bf2 Qf5 26.d4 Qh3 27.Ng2 Rf7 28.Be3 (28.Kg1 Raf8+=) 28...Raf8 (28...h4 29.Bg5 hg3 30.Ne3+=) 29.Raf2 (29.d5 Nec5 30.Nc5 Nc5 31.Bg5 Ne4+=) 29...Bf6 (better is 29...h4!? 30.g4 Be3 31.Ne3 Nf4–/+) 30.d5= Nd8 31.Qc2 g5 (31...h4 32.gh4 Bh4 33.Nh4 Qh4 34.Qe4+=) 32.f4 (better is 32.Nd2!?+=) 32...h4+= 33.gh4 (33.fg5? hg3 34.Nf4 ef4–+) 33...gf4 34.Rf3 Qg4 35.Nf4 Bg7 (35...ef4? 36.Rg1 Qg1 37.Bg1+–) 36.Rg1?? (better is 36.h3 Qf5 37.Nd3 Qf3 38.Rf3 Rf3 39.Bg5–/+) 36...Qf3–+ 37.Ng2 Nf6 38.Nd2 (38.Re1 Ng4 39.Bg1 Qh3–+) 38...Qh5 (38...Qh3 39.Ne4 Ng4 40.Nf4 Qe3 41.Rg4 Rf4 42.Rf4 Rf4 43.Ng3–+) 39.h3 Qh7 (39...Kh8 40.Qd1–+) 40.Qd1 (40.Qh7 Kh7 41.Kh2 Bh6–+) 40...Nh5 41.Qg4 Qf5 (41...Kh8 42.Bg5–+) 42.Bg5 Qg4 (42...Nb7 43.Kh2 Qh7 44.Ne4–+) 43.hg4 Ng3 44.Kh2 Ne2 45.Re1 Nd4 46.Kg3 (46.Bd8 Rd8 47.Re3 Rf2–+) 46...Nb7 47.h5 Nf3 48.Nf3 Rf3 (48...Rf3 49.Kh4 Nc5–+) 0–1. Satka,Martin – Heinze,Johannes, Brandenburg–ch Seniors, 2004.

4.e3 e5 5.Bb2 d6 (5...e4 6.Nh3=) 6.Nf3 Ne7 (6...Ne7 7.Nc3 Nd7=; 6...Nd7 7.Be2=). jlepok (1885) – Strjuk (1970), internet, 2007.

4.e3 e6 5.Bb2 (--> 4.Bb2 e6 5.e3).

4.e3 Nf6 5.Bb2 =.

4.Nf3 Nf6 5.e3 d5 6.Bb2 Nbd7 7.Be2 e6 8.0–0 Bd6 9.d3 (9.Ba3 0–0=) 9...e5 (9...0–0 10.Ba3=) 10.d4 e4 (10...Qe7 11.de5 Ne5 12.Ne5 Be5 13.Be5 Qe5 14.Nd2=) 11.Ne5 (11.Nh4 0–0=) 11...0–0 12.Nc6 (12.c4 Qe7 13.Nd7 Qd7=) 12...Bc6=+ 13.bc6 Nb8 14.Bb5 Qe8 (14...Be7 15.f3=) 15.c4 dc4 (< 15...Nc6 16.cd5 Nd5 17.Qc1 Nd4 18.Bd4+/–) 16.Qc2 (16.d5 Be5 17.Nc3 Qe7=) 16...Nd5 (16...Qe6 17.Bc4 Qf5 18.Bb5=) 17.Qc4 (17.Nc3 Nf6=) 17...Nb4 (17...Qe6 18.Rd1=) 18.Ba3 (18.Nd2+=) 18...Qe6 (18...Qe7!?+=) 19.Qe6+/– fe6 20.Nc3 (20.Rc1 e5 21.Bc4 Kh8 22.d5+/–) 20...Rf7 (20...N4c6!? 21.Ne4 Ba3 22.Ra3 Nb4+/–) 21.Ne4 (21.Bb4 ab4 22.Ne4 Bf8+–) 21...Nc2 (21...N8c6 22.Rab1 Bf8 23.Ng5+–) 22.Ra2 Na3 23.Ng5?? Nb5 24.ab5? Rf6 25.e4 Rg6 26.h4 h6 27.e5 Be7 28.Nf3 Nc6?? 29.Kh2?? Nb4–+ 30.Rb2 Rd8 31.g3 Rg4 32.Rd2 Nd5 33.Rc1 Rd7 34.Rdc2 Bd8 35.Rc6 Kf7 36.Kh3 h5 37.Ng5 Bg5 38.hg5 Rd4 39.g6 Kg6 40.Re6 Kf7 41.Rec6 Rd2 42.Kg2?? Rb2 43.e6=+ Ke7 44.ed7 Kd7 45.Kf3 Rb5 46.Ke4? a4 47.R6c2 a3 48.Rd1 c6 49.Ra2 Ra5 50.Rh1?? g6 51.f4 Ke6 52.g4 Nc3 53.Kd4 Na2 54.f5 gf5 55.gf5 Kf6 56.Rh5 Ra4 57.Kd3 Nb4 58.Kc3 a2 59.Rh6 Kf5 60.Rh1 a1Q 61.Ra1 Ra1 (62.Kb4 Ra4 63.Kc3 b5–+) 0–1. metal – JODIE (1640), caissa.com, 2007.

4.Nf3 Nf6 5.e3 d6 6.Bb2 g6 7.Be2 Bg7 8.c4 0–0 9.0–0 Nbd7 10.Nd4 Nc5 11.Nc6 Bc6 12.bc6 Qe8 13.Bf3 (13.d4 Na6+=) 13...Ne6 (13...Nd3 14.Bf6 Bf6 15.Ra3=) 14.Nc3 Ng5 (14...Nd8 15.Nb5 Rc8 16.d3+=) 15.Nd5 (15.Nb5!? Rc8 16.d3+/–) 15...Nf3 16.Qf3 Nd5 17.Bg7 Kg7 18.cd5 e6 19.e4 ed5 20.ed5 Qe5 21.Rfe1 Qf6 22.Qf6 Kf6 23.Re3 Rfe8 24.Rae1 (24.d4 Re3 25.fe3 Kf5 26.Rf1 Ke4 27.Rf7 Ke3 28.Rc7 Kd4 29.Rh7 Kd5+=) 24...Re3 25.de3 Re8 (25...b5+=) 26.Rb1 (better is 26.e4=) 26...Re4 27.Ra1 Ke5 28.Kf1 Kd5 29.Rd1 Kc6 30.Ke2? (30.Rc1 Kd7 31.Ra1–+) 30...Ra4 31.f3 (31.Rd2 b5 32.h4 b4 33.Rc2 Kb6–+) 31...Kd7 (31...Ra2 32.Kd3 Rg2 33.h4–+) 32.Kd3 b5 33.Rc1 (33.Rb1 Ra3 34.Kc2 b4–+) 33...d5 (33...Ra3 34.Kd2–+) 34.g3 (34.e4 de4 35.fe4 Ra2–+) 34...Rc4 (34...Ra3 35.Kc2–+) 35.Rd1 (35.Ra1 a4–+) 35...Kd6 36.e4 (36.h4 c5–+) 36...de4 (36...c5 37.Rb1 b4 38.Kd2–+) 37.fe4 Ke5 (better is 37...c5 38.Ke3 Rd4 39.Rb1–+) 38.Ke3 (38.Rf1 f6 39.Rb1–+) 38...a4 (better is 38...Re4!? 39.Kf3 c5 40.Rd7–+) 39.Rd7?? (39.Rd5 Ke6 40.Rb5–+) 39...a3 (better is 39...Rc3 40.Kd2 b4 41.Re7 Kf6–+) 40.Re7 (40.Rd5 Ke6 41.Rb5–+) 40...Kf6 41.Rd7 a2 42.Rd1 b4 43.g4 (43.e5 Ke5 44.Rg1 b3–+) 43...b3 44.Rf1 Ke6 45.g5 b2 46.Rf6 Ke7 47.Kd3 b1Q 48.Kc4 Qc2 49.Kd5. TIROLOCO – baretti, Live Game Caissa's Web, 2004.

4.Nf3 h5 5.Bb2 (5.d3 Nf6=) 5...h4+= 6.h3 Nf6 7.e3 d6 (7...e6 8.Bc4+=) 8.Be2 (8.Bc4 e5+=) 8...e5 9.c4 (9.0–0 Be7+=) 9...Nbd7 10.Nc3 Be7 11.Nd5 (11.0–0 e4 12.Nd4 Ne5+=) 11...0–0 (better is 11...Nd5 12.cd5 Bd5=+) 12.Ne7+/– Qe7 13.0–0 (13.Nh4 Rfe8+/–) 13...e4 (13...Bf3 14.Bf3 e4 15.Be2+=) 14.Nh4+/– Qe6 15.Bg4 (15.f4 Rad8+/–) 15...Qe8 (15...Ng4 16.Qg4 Qg4 17.hg4+=) 16.Be2 (16.f4+/–) 16...Nc5?? (better is 16...Qe6=) 17.Nf5 (17.Bf6 gf6 18.f3 Qe6+–) 17...Rd8 (17...Qe6 18.Nd4 Qe7 19.f3+/–) 18.d3 (18.Bf6 gf6 19.d4 Ne6+–) 18...d5 19.Bf6+– gf6 20.de4 dc4 21.Qc2?? Be4–/+ 22.Qb2 Bf5–+ 23.Qf6 Bg6 24.Bc4–/+ Qe4 25.Ba2 Rd2 26.h4? Ne6 27.Be6 Qe6 28.Qg5 Qf5 29.Qf4? Qf4–+ 30.ef4 Rfd8 31.Rac1 Bc2 32.f5 Rf2 (33.Kf2 Ba4 34.Rc7 Bb5+–; better is 32...Kg7–+) 0–1. stoker – Schoolage, Live Game Caissa's Web, 2006.

4.Bb2 d5

5.e3 Nd7 6.Nf3 e6 7.c4 Ngf6 8.Be2 (8.Nc3 Bd6=) 8...Be7 (8...dc4 9.Bc4 Be7 10.0–0=) 9.0–0 0–0 10.d4 Rc8 (10...dc4 11.Bc4 Rc8 12.Nc3=) 11.Nbd2 (11.Ba3 dc4 12.Bc4 c5=) 11...c6 12.Qb3 c5 13.Rac1 (13.Rad1 cd4 14.Bd4 Nc5=) 13...cd4 14.ed4 (14.Bd4 Nc5 15.Qd1 Nfe4=) 14...Re8 15.Rfe1 Ba8 (15...dc4 16.Nc4 Nd5 17.Nce5=) 16.Bd3 (16.Ba3 Ba3 17.Qa3 dc4 18.Nc4 Bd5=) 16...Bb7 (16...dc4 17.Rc4 Rc4 18.Qc4+=) 17.Ne5= Ne5 (17...dc4 18.Ndc4 Bd5 19.Ba3=) 18.de5 Nd7 (18...dc4 19.Nc4 Qd5 20.Bf1+/–) 19.Bd4 (19.Qc2 h6+=) 19...Nc5= 20.Bc5 (20.Qc2 Nd3 21.Qd3 Bb4=) 20...Bc5+= (worse is 20...bc5 21.Qc2+=) 21.Nf3 dc4 22.Bc4 (worse is 22.Rc4 Bd5–/+) 22...Qe7 23.Red1 h6 (23...Red8 24.Rd8 Rd8 25.Rd1+=) 24.Rd2 Red8 25.Rcd1 Rd2 26.Rd2 Bf3 27.Qf3 Bf2 28.Qf2 (28.Rf2 Rc4) 28...Rc4 29.Qb6 (29.Rd1!?+=) 29...Rc1–/+ 30.Kf2 Qh4 31.Ke3 Rc3 (31...Qg5 32.Kd3 Qf5 33.Kd4 Qf4 34.Kd3 Qc4 35.Ke3 Qc3 36.Ke2 Qe5 37.Qe3 Re1 38.Ke1 Qe3 39.Kd1–+) 32.Ke2–/+ Qe4 33.Kf2 Qf4 34.Ke2 Qe5 35.Kf2 (35.Kd1!? Qh5 36.Re2 Rd3 37.Ke1 Qh4 38.g3 Qa4 39.Kf2–+) 35...Qh2 (35...Qh2 36.Qd4 Rc8–+) 0–1. Van Esbroeck,Dirk – Hasler,Ulrich, CiF, 1991.

5.e3 Nd7 6.Nf3 e6 7.Be2 Ngf6 8.0–0 Bd6 9.d4 0–0 10.c4 c6 11.Nbd2 c5 12.dc5 Nc5 13.cd5 Nd5 14.Nd4 (14.Rc1 Rc8=) 14...Be5 (14...Qc7 15.N4f3=+) 15.Nc4 (15.Nc6 Bc6 16.Be5 Bb7+=) 15...Bf6= 16.Bf3 Rc8 17.Rc1 Qe7? (better 17...Qc7!? 18.Ba3 Be7=) 18.Ba3 (18.Bd5 Bd5 19.Nb6 Qb7 20.Nc8 Rc8+–) 18...Rfd8 (18...Qc7!?+–) 19.Bd5+– Rd5 20.Nb6 Rdd8? (20...Rg5 21.f3 Rd8+–) 21.Nc8 Bc8 (21...Rc8 22.Qc2+–) 22.Bc5 (better 22.Nc6!? Qd7 23.Bc5 Re8+–) 22...Qb7 (22...Qc7 23.Bb4 Qb6 24.Bc3+–) 23.Qf3 Qb8 (23...Qf3 24.Nf3 Bb7 25.Bb6+–) 24.Nc6 Bb7 25.Nb8 Bf3 26.Nc6 Rb8 (26...Bc6 27.bc6 Rc8+–) 27.Nb8 (27.Nb8 Bd5 28.Bd4+–) 1–0. BeepBeepImAJeep (2660) – boo24 (2300), lichess.org, 2017.

5.e3 Nd7 6.f4 Ngf6 7.Nf3 e6 8.Be2 Be7 (8...Bd6 9.0–0=) 9.0–0 0–0 10.c4 c6 (10...Nc5 11.Ne5=) 11.bc6+= Bc6 12.Nd4 Bb7 13.Na3 Ba3 (13...Rc8 14.Rc1+=) 14.Ba3 (14.Ra3 Nc5+=) 14...Re8 (14...Nc5!?+=) 15.cd5+– Nd5 16.Rc1 Rc8 17.Bb5 Nc7 (17...Nb4 18.Rc8 Qc8 19.Qb1+–) 18.Bc6+– Bc6?? (better 18...Ba6 19.Re1 Nd5+–) 19.Nc6 (19.Rc6?! Nd5+–) 19...Qf6 (19...Qh4 20.Na7 Nb8 21.Qb3+–) 20.Na7 h6 (20...Nb8 21.Qb3+–) 21.Qf3 Nc5 (21...Nb5 22.Nb5 Red8+–) 22.Nc8 Rc8 23.Bc5 bc5 24.Qb7 Qd8 (24...Rd8 25.Qc7 Rd2 26.Qa5+–) 25.Rc5 1–0. Vendelo – Kysio, internet free game, 2018.

5.e3 e5 6.Nf3 e4 7.Nd4 Nd7 8.c4 Ngf6 9.Be2 Bd6 10.Nc3 White gets the initiative 10...g6 (better 10...dc4!? 11.Bc4 Ne5=+) 11.cd5 Nd5 (11...Nc5 12.Nc6 Bc6 13.dc6+–) 12.Ne4 Qe7? (better 12...Be5+–) 13.Nd6+– Qd6 14.0–0 (better 14.Nf5! gf5 15.Bh8 f6+–) 14...f6 15.Rc1 0–0–0 16.Nc6 Rdg8 (16...Rde8 17.Bf3+–) 17.Qb3 Nc5? (17...Nb4 18.Nb4 ab4 19.Bc4+–) 18.Qa2 (better 18.Rc5 bc5 19.Bc4 (19.Na5?! Ba8+–) 19...Bc6 20.bc6+–) 18...Bc6 19.bc6 Nb4 20.Qc4 h5 21.Ba3 g5 Black plans h4 (21...Ncd3 22.Bd3 Qd3 23.Bb4 Qc4 24.Rc4 ab4+–) 22.Bb4 ab4 23.Qb4 h4 24.d4 Ne4 25.Qd6 Nd6 26.a5 ba5 27.Ra1 Kd8 28.Ra5 Ke7 29.Ra7 Ne8 30.h3 f5 31.Bd3 Rf8 32.Rc1 g4 33.Rc5 gh3 34.gh3 Rhg8 (34...f4 35.Bc4+–) 35.Kf1 Ke6 (35...f4 36.Re5 Kd6 37.Bc4 Kc6 38.Bg8 Rg8 39.Ra8+–) 36.Bc4 Kd6 37.Bg8 Rg8 38.Rf5 Kc6 39.Rf4 (39.Rf4 Rh8 40.Ra8+–) 1–0. BeepBeepImAJeep – AkbarChess (2265), lichess.org, 2016.

5.e3 e6 6.Nf3 Nf6 7.c4 Be7 8.Be2 Nbd7 9.0–0 0–0 10.d4 dc4 11.Nbd2 c3 12.Bc3 Nd5 13.Bb2 N7f6 14.Nc4 Nb4 15.Nce5 Ne4 16.Rc1 f6 17.Nd3 Nd3 18.Bd3 Nd6 (18...Rc8 19.Qb3 Bd5 20.Qc2+=) 19.Nd2 Qe8 (19...h6 20.Qh5+–) 20.Qg4 (better 20.Qc2!?+–) 20...f5 21.Qg3 Qf7? (better 21...Rf6!? 22.f3 Rg6+=) 22.Rc7+– Rac8 23.Rfc1 Rc7 24.Rc7 Rc8 (24...Bd5 25.Ba3 Rd8 26.Nf3+–) 25.Rc8 (25.Re7 Qe7 26.Ba3 Ne4 27.Be7 Ng3 28.hg3 Bd5+–) 25...Bc8 (25...Nc8 26.Nc4 Bd8+–) 26.Ba3 Ne4 (26...Qf8 27.Nc4 Nc4 28.Be7 Qe7 29.Bc4+–) 27.Be4 Ba3 28.Bc6 (better 28.Qb8 Qf8 29.Bc6+–) 28...Qe7?? (28...Qa7+–) 29.Qb8 Qd8 30.Nc4 Be7 31.Nb6 (31.Nb6 Ba6 32.Qd8 Bd8 33.Nc4 Bb5 34.ab5+–) 1–0. BeepBeepImAJeep (2610) – ediboss21 (2435), lichess.org, 2019.

5.Nf3+= e6 6.e3 c5 (6...Nf6 7.Bd4=) 7.bc6+= Nc6 8.Bb5 Rc8 9.0–0 Nf6 10.d3 (10.Nc3 Bd6+=) 10...Bd6= 11.Ne5 Qc7 12.f4 0–0 (12...Bc5 13.Bd4=) 13.Nc6 Bc6 14.Bf6 gf6 15.Bc6 Qc6 16.Ra2 Kh8 17.Qh5 f5 (18.Rb2 Bb4=). Kross – Wartig,Wolfgang, corr SOK–89–48, 1989.

4.Bb2 d6

5.Nc3 e5 6.e4 (6.Nf3 Nd7=) 6...g6 (6...Nf6 7.Nf3=) 7.d3 (7.Nf3!?+=) 7...Bg7 8.Nf3 Ne7 (8...Nf6 9.g3+=) 9.Be2 0–0 10.0–0 Nd7 11.Rb1 (11.d4 d5 12.ed5 Re8=) 11...f5 (11...Nc5 12.h3+=) 12.Nd2 Nf6 (12...Nc5!?+=) 13.Bf3+= Kh8 (13...fe4 14.de4 Nd7 15.Qe2+=) 14.Re1 Qd7 15.ef5 (15.Nc4 Kg8+=) 15...Bf3= 16.Qf3 Nf5 17.Nde4 (17.Qh3 Qf7 18.Nf3 h6=) 17...Nd4 (17...Nh5 18.Qg4 Nf4 19.Kh1–/+) 18.Qd1 Qf5 (better is 18...d5 19.Nf6 Bf6=) 19.Ne2?? (better is 19.Qd2=) 19...Ne4–+ 20.de4 Qf2 21.Kh1 Ne6 22.Rf1 Qf1 (22...Qe3 23.Ng3–+) 23.Qf1 Rf1 24.Rf1 Kg8 25.g3 (25.Bc1 c6! 26.Nc3 cb5 27.Nb5 Rc8–/+) 25...Nc5 (25...Bh6 26.Nc3–/+) 26.Nc3 Bh6 27.Ba3 Ne6 28.Nd5 Rf8 29.Rf8 Bf8 (29...Kf8? 30.Nc7 Kf7 31.Nd5+–; worse is 29...Nf8 30.Nc7 Nd7 31.Bd6+/–) 30.Kg2 Kf7 31.h4 (31.Bc1 Nc5–/+) 31...Bh6 32.c3 g5 33.hg5 (33.Kf3 gh4 34.gh4 Bf4–/+) 33...Bg5–+ 34.Kf3 Bd8 (34...Kg6–+) 35.Kg4 (35.Ke2!?–/+) 35...Kg6–+ 36.Ne3? (36.Kf3–+) 36...Ng5 37.Nd5 Ne4 (37...h5 38.Kh4–+) 38.Bc1 (38.Kf3 Ng5 39.Ke2 Kh5–+) 38...Nc5 39.Bd2 (39.Ba3 Na4 40.Kf3 Nc5–+) 39...Na4 40.Kf3 h5 41.Be1 (41.Bc1 Nc5–+) 41...Nc5 42.Bd2 (42.c4 e4 43.Ke2 a4–+) 42...a4 43.Bc1 (43.Nb4 e4 44.Ke2 Nb3–+) 43...Nb3 44.Bb2 Kf5 45.Ne3 (45.Ke2 Ke4 46.Nb4 d5–+) 45...Ke6 46.c4 (46.Ke2 Bg5 47.Nd1 Kd5–+) 46...h4 (better is 46...Bg5 47.Kf2 Na5 48.Nc2 Nc4 49.Bc3–+) 47.gh4 Bh4 48.Ke2 Bg5 49.Nd5 Kd7 (49...Nd2 50.Nc7 Kd7 51.Nd5 Nc4 52.Bc3–+) 50.Kd1 (50.Nc3 Nd2 51.Kd3 Ke6–+) 50...Na5 51.Nc3 (51.c5 bc5 52.Nc3 Nc4 53.Na4 Nb2 54.Nb2 d5–+) 51...Nc4 52.Na4 d5 53.Bc3 (53.Ke2 d4–+) 53...Ke6 54.Be1 (54.Nb2 Nd6–+) 54...d4 55.Kc2 (55.Bg3 Nd6–+) 55...Nd6 0–1. mic (2105) – gtan (2130), net–chess.com, 2007.

5.Nc3 Nf6 6.Nf3=.

5.c4 Nd7 6.d4 Be4 (6...e5 7.Nd2=) 7.Nc3+= Bg6 8.e4 e6 9.Bd3 Be7 10.Qc2 (10.Nf3 Bh5+=) 10...Nh6 (10...Bf6 11.Nce2+=) 11.h3 0–0 12.Nf3 f5 13.e5 (13.0–0!?+=) 13...de5= 14.de5 Bb4 (14...Nf7 15.Na2=) 15.Rd1 Qe7 16.0–0 Nc5 17.Nd4 Qh4 18.Nce2 Nd3 19.Qd3 (worse 19.Rd3 f4=+) 19...f4 20.Qb3 (20.Qf3 Bh5 21.Qc6+=) 20...Bf7? (better 20...Qh5!?=) 21.Bc1 (21.Nf3 Qe7+–) 21...g5 22.Nf3 Qh5 23.Nfd4 (23.Ba3 Ba3 24.Qa3 Nf5+–) 23...Nf5 (23...Qh4 24.Ba3+–) 24.Qf3 (24.Ba3!?+–) 24...Qf3= 25.Nf3 h6 (25...Bh5 26.Rd3=+) 26.Rd7 (26.g3 fg3 27.fg3 Rad8=) 26...Rac8 (26...Bh5 27.Rfd1=) 27.Rfd1 Bc5 (27...Bh5 28.Bb2=) 28.Kf1 (28.Ned4 c6 29.Bb2 Nd4 30.Bd4 cb5 31.Bc5 Rc5 32.cb5 Bh5+–) 28...Bh5= 29.Nh2 Be2 (29...Ng3 30.fg3 fg3 31.Nf3 Bf3 32.gf3 Rf3 33.Ke1=+) 30.Ke2+= Rf7 31.Bb2 h5 (31...c6 32.Ng4+=) 32.R1d3 (32.R7d3 Nh4+=) 32...Nh4 33.Rf7 Kf7 Black is in command 34.Rd7 Kg6 35.Kf1 (35.g3 fg3 36.fg3 Nf5=) 35...Bb4 (35...c6 36.Rd2=+) 36.Bd4 Nf5 37.Bb2 (37.Nf3 g4 38.Ng1 Kg5 39.hg4 A) worse 39...Nd4 A1) 40.Rd4?! hg4 (worse 40...Kg4 41.Nh3 Kf5 42.Rf4 Ke5 43.Rh4+–) 41.Ne2 Rf8=; A2) 40.Nh3 Kg4 41.Rd4+–; B) 39...hg4=) 37...c6=+ 38.Rd3 (38.bc6!? Rc6 39.Rb7–/+) 38...cb5–/+ 39.cb5 Rc2 40.Ba3 Ba3 41.Ra3 Nd4 Threatening mate: Rc1 42.Ke1 Rc5 (42...Rb2 43.Rc3 Rb4 44.Rc8–+) 43.Rd3 (better 43.Kd1!?–+) 43...Rc4 44.Nf3 Nf3 45.gf3 Ra4 46.Rd6 Rb4 (46...Kf5!? 47.Rb6 Rb4 48.Rb8–+) 47.Re6–/+ Kf5 48.Rb6 Ke5 49.Rb8 a4 50.b6 a3 51.b7 a2 Threatening mate... how? 52.Ra8 Rb1 53.Ke2 Rb2 54.Kd3 Rb7 55.Ra2 Rb3 56.Ke2 Rb5 57.Rd2 (57.Kd3!?–/+) 57...Rb1–+ 58.Rd1 Rb2 (58...Rd1 59.Kd1 Kd5 60.Kc1–/+) ½–½. petrobbo (1990) – graniteproqual (1925), ChessWorld.net, 2012.

5.c4 e5 6.Nc3 f5 7.Qc2 g6 8.Nd5 (8.Nf3=) 8...Bd5 (better 8...Nf6=+) 9.f4?? (better 9.cd5 Ne7 10.g3+–) 9...Be6 (9...Bb7 10.c5 bc5 11.fe5 de5 12.Be5–+) 10.fe5 (10.Nf3–+) 10...d5?? (better 10...de5 11.Be5 Nf6–+) 11.cd5 (11.Nf3!? Bc5 12.e3–/+) 11...Qd5–+ 12.Qc7 (12.Nf3 Nd7 13.Ng5 Nc5–/+ (13...Ne5 14.Qc7 Bd6 15.Qg7–/+)) 12...Nd7 13.Qd6?? (better 13.e3–+) 13...Bd6 14.ed6 Ngf6 15.Ba3 Qe4 (15...Ne5 16.Bb2 Ne4 17.Rd1–+) 16.Nh3 h6 (16...Qd4 17.Rd1–+) 17.Bb2 Rc8 (17...Qc2!? 18.Bf6 Nf6 19.e3–+) 18.Nf2 Qd5 19.e3 0–0 20.Be2 Qd6 (better 20...Qg2 21.Bf1 Qg5 22.Be2–+) 21.Ba3 Nc5 (better 21...Qe5!? 22.0–0 Rfe8 23.Bf3–+) 22.d4 Rfd8 (better 22...Qd5 23.dc5 Qg2 24.Rf1 bc5 25.b6 Qh2 26.b7–+) 23.0–0 Ng4 (23...Nd5 24.dc5 bc5 25.Bc1–+) 24.Ng4 (24.Bg4 fg4 25.dc5 bc5–+) 24...fg4 25.dc5 (25.Kh1 Rf8 26.Rfd1 Rcd8–+) 25...bc5 (better 25...Qe5 26.e4 Rd2–+) 26.Rf6 (26.Rae1–+) 26...Qe5 27.Raf1 Qe3 28.R1f2 Rf8 29.Bb2 Bf5 (29...Rf6 30.Bf6 Rf8 31.Bg4 Rf6 32.h4 Bg4 33.Kh2 Rf2 34.Kg1 Qg3 35.b6 Qg2) 30.Kf1 Rf6 31.Bc4 (31.g3 Rf7 32.Ba1 Bd3 33.Bf6 Rf6 34.Rf6 Qe2 35.Kg1 Qe1 36.Kg2 Be4 37.Rf3 Bf3) 31...Kg7 (31...Kh7 32.Rf3 gf3 33.g4 Bd3 34.Bd3 Qd3 35.Kf2 Qe2 36.Kg3 g5 37.Bf6 Qg2) 32.Kg1 Qe1 (32...Rcf8 33.Be2 Be4 34.Bf3 gf3 35.h4 fg2 36.Bf6 Rf6 37.h5 Qf2 38.Kh2 g1N) 33.Bf1 Qb4 (better 33...c4 34.Bf6 Kf6 35.Re2–+) 34.Bf6 Kf6 35.g3 Rd8 36.Rf4 Qc3 37.Rc4 (37.Kf2 Rd2 38.Kg1 Qe3 39.Kh1 g5 40.h3 gf4 41.gf4 g3 42.Be2 Re2 43.b6 Be4) 37...Qe3 38.Kh1 (38.Kg2 Rd2 39.Kh1 Qf2 40.Be2 Qe2 41.Rc5 Qh2) 38...Rd1 (38...Qf3 39.Kg1 Rd1 40.h3 Rf1 41.Kh2 Rh1) 39.Rf4 g5 40.Rf5 (40.Kg2 gf4 41.h3 Qg3 42.Kh1 Rf1) 40…Kf5 (40...Kf5 41.h3 Rf1 42.Kg2 Qe2) 0–1. pumpkin516 – headstone, gameknot.com, 2015.

5.c4 e5 6.Nc3 Nf6 7.d3 (7.Nf3 Nbd7=) 7...Nbd7 8.e4 (8.Nf3 h5=) 8...g6 (8...Be7 9.Nf3+=) 9.Be2 Bg7 10.Nf3 0–0 11.h3 c6 (11...Nc5 12.0–0=) 12.Ba3 (12.0–0 Nc5=) 12...cb5 13.Bd6 (better is 13.Nb5 Nc5 14.0–0=) 13...Re8 (better is 13...bc4!? 14.Bf8 Qf8+=) 14.Nb5+/– Rc8 15.Ba3 (15.0–0 Nh5+=) 15...Nc5+= 16.0–0 (16.Rb1 Nh5+=) 16...Nh5 17.Nh2 (17.g3!?+=) 17...Nf4= The pressure on the backward pawn d3 grows 18.Bc5 Rc5 (18...bc5 19.Nf3=) 19.Ng4 (better is 19.Nf3!?=) 19...f5–/+ 20.Ne3 fe4 21.de4 Qg5 (better is 21...Be4!? 22.Ra2 Bc6–/+) 22.Kh2= Rd8 23.Qe1? (better is 23.Qc2=) 23...Be4–+ 24.Rg1 Bb7 (better is 24...Ne2 25.Qe2 Bd3–+) 25.Bf3?? (better is 25.Rd1–/+) 25...e4–+ 26.Bg4 Qe5 (better is 26...h5 27.Rd1 hg4 28.Ng4 Nd3–+) 27.g3 Nd3 (better is 27...Qa1 28.Qa1 Ba1 29.Ra1–+) 28.Qf1? (better is 28.Qd2–+) 28...Qa1 (28...h5 29.Be2 Qa1 30.Qa1 Ba1 31.Ra1 Nf2 32.Nc3–+) 29.Qa1 (29.Be6 Kf8 30.Qa1 Ba1 31.Ra1 Nf2–+) 29...Ba1 30.Ra1 Nf2 (30...Rf8 31.Nd4–+) 31.Be6 Kg7 (better is 31...Kf8 32.Bd5 Bd5 (32...Rcd5?! 33.cd5 Nd3 34.Nc3–/+; 32...Rdd5?! 33.cd5 Nd3 34.Rf1 Kg8 35.Rf6–/+) 33.cd5 Ke7–+) 32.Ra2 (32.Bd5 Bd5 33.cd5–+) 32...Nd1 33.Nd5 (33.Nd1 Rd1 34.Bg4 Rc1–+) 33...Bd5 (33...e3!? 34.Na3–+) 34.Bd5 (34.cd5 Kf6–+) 34...e3 (34...Rb5!? 35.ab5 Nc3 36.Rc2 Nd5 37.cd5 Rd5 38.Rc7 Kf8 39.Rc8 Kf7 40.Rc7 Kg8 41.Rc8 Kf7 42.Rc7 Ke6 43.Rc6 Rd6 44.Rc7–+) 35.Re2 Rcd5 (better is 35...Rf8 36.Re1 Rf2 37.Kg1–+) 36.cd5 Rd5 (36...Rd5 37.Kg2 Kf6–+) 0–1. mic (2250) – gtan (2310), net–chess.com, 2008.

5.c4 e5 6.e3 Nd7 7.d4 g6 (7...ed4 8.Bd4 Nh6 9.Nf3=) 8.d5 Bg7 9.Nf3 h6 10.Be2 Ngf6 11.0–0 Nh5 (11...Nc5 12.Nc3+=) 12.Nc3 0–0 13.Ne4 (13.Nd2 Nhf6+=) 13...Ndf6 (13...Nhf6 14.Nf6 Qf6 15.Qc2=) 14.Bd3 (14.Nfd2 Ne4 15.Ne4 Nf6 16.Nf6 Qf6+=) 14...Ne4= 15.Be4 f5 16.Bc2 Rf7 17.Qb1 (17.e4 fe4 18.Be4 Qf6+=) 17...e4 (17...Qf6 18.Bd3=) 18.Nd4+= Bc8 19.Nc6 Qf8 20.Bg7 Ng7 21.f3 ef3 22.Rf3 Nh5 (22...Bd7 23.Nd4+=) 23.Qb2 Bd7 24.Nd4 (24.Raf1 Qg7 25.Qg7 Ng7+=) 24...Qg7 25.Raf1 Raf8 26.e4 f4 27.Rd3 (27.Qc3 Qe5=) 27...g5 (27...f3 28.gf3 Nf4 29.Re3=+) 28.Qc1 Nf6 29.Qd1 (29.Re1!?=) 29...Ne4–/+ 30.Re1 Nc5 31.Rh3?? (better 31.Rd2!?=+) 31...g4 (better 31...Bh3!? 32.gh3 f3 33.Kf2–+) 32.Rh4 (better 32.Rh5–+) 32...h5?? (better 32...f3 33.Rf1 Rf4–+) 33.Rh5= f3 34.Rh7?? (34.Rf1 Rf4 35.Nc6 Bc6 36.dc6 Ne6=+ (36...Rc4?? 37.Qd5 Rf7 38.Qc4+–)) 34...Qg5 (34...f2 35.Kf1 fe1R 36.Ke1 Rf1 37.Kd2 Qd4 38.Kc1 Qa1 39.Bb1 Qa3 40.Kd2 R8f2 41.Qe2 Qc1) 35.Ne6?? (35.Rf7 Rf7 36.Kh1–/+ (36.gf3 gf3 37.Kf2 Qh4 38.Ke3 Qh6 39.Kf2 Nd3 40.Qd3 Qh2 41.Ke3 Qf4 42.Kf2 Qh4 43.Ke3 Qe1 44.Ne2 f2–+)) 35...Be6 (35...f2 36.Kf1 fe1R 37.Ke1 Qe3 38.Qe2 Rf1) 36.de6 (36.Rf7 Bf7 37.Qc1–+) 36...f2 37.Kh1 (37.Kf1 fe1R 38.Ke1 Qe3 39.Qe2 Rf1) 37...fe1Q (37...fe1N?! 38.ef7 Rf7 39.Rf7 Kf7 40.Qe1=) 38.Qe1 Rh7 (38...Rf1 39.Qf1 Rf1) 39.Bh7–+ Kh7 40.e7 Re8 41.Qb1 Kg7 42.Qb2 (42.Qa1 Kg8 43.h3 Re7 44.g3 Qd2 45.Qf6 Re1 46.Qf1 Rf1) 42...Kf7 (42...Kg8 43.Qb1 Nd3 44.Qg1 g3 45.Qe1 Ne1 46.c5 Qd2 47.cd6 Qg2) 43.Qf2 (43.Qb1 Ke7 44.Qf1 Ne4–+) 43...Qf6 44.Qg3 Re7 (44...Qf1) 45.h3 gh3 46.Qh3 Kg7 (46...Re1 47.Kh2 Qf4 48.Qg3 Rh1 49.Kh1 Qg3 50.Kg1 Nd3 51.c5 Nf4 52.Kf1 Qg2 53.Ke1 Qe2) 47.Qg3 Qg6 (47...Kh8 48.Qh3 Rh7 49.Qh7 Kh7 50.Kg1 Nd3 51.Kh2 Qh4 52.Kg1 Qf2 53.Kh2 Nf4 54.c5 Qg2) 48.Qc3 Re5 (48...Kg8!? 49.Kg1–+) 49.Qd4 Qh5 50.Kg1 Qf5 (better 50...Kg8 51.Qd2–+) 51.Qd2 Ne4 (51...Qb1 52.Kf2 Ne4 53.Ke2 Nd2 54.Kd2 Qe1 55.Kd3 Re3 56.Kc2 Re2 57.Kd3 Qd2) 52.Qe2 Ng3 53.Qa2 (53.Qd1 Ne2 54.Qe2 Re2 55.Kh2 Qg4 56.c5 Qg2) 53...Re1 54.Kh2 Ne4 (54...Nf1 55.Kg1 Ne3 56.Kh2 Qf4 57.g3 Qh6) 55.Qb2 Kg6 56.c5 (56.Qg7 Kg7 57.g4 Qf4 58.Kh3 Qg3) 56…Qh5 0–1. AleksandrNekhoroshik (1685) – mantequillas (1650), lichess.org, 2020.

5.c4 e5 6.Nf3 Nf6=.

5.c4 Nf6 6.Nf3+=.

5.Nf3 Nd7 6.e3 Ngf6 7.d4 g6 (7...e6 8.Bd3=) 8.Nbd2 Bg7 9.c4 (9.Bd3 e5 10.de5 Ne5 11.Ne5 de5+=) 9...0–0 10.Bd3 e6 (10...e5 11.Qc2=) 11.h3 (11.0–0 e5 12.Qc2 Qe7+=) 11...Re8 (11...e5 12.Be2=) 12.0–0 Qe7 (12...e5 13.Be2=) 13.Bc2 e5 14.d5 Nc5 15.e4 Nh5 16.Ba3 (16.Nb3 Nb3 17.Bb3 Nf4=) 16...Nf4 17.Bc5 (17.Kh2 Bc8=) 17...dc5 18.Kh2 Bc8 19.g3 (19.Ng1!?=) 19...Nh3–/+ 20.Qe2 (20.Kg2 Ng5 21.Rh1 Bg4–/+) 20...h5 (20...Ng5 21.Rh1–/+) 21.Rh1 (21.Qe3 Qf8=+) 21...Bh6 (21...Ng5 22.Qe3 Bh6 23.Ng5 Bg5 24.f4=+) 22.Kg2 (22.Nf1 Ng5=+) 22...Ng5–/+ 23.Ng5 Qg5 24.Nf3 Qf6 25.Bd3 (25.Qd3 Bg4–/+) 25...Bg4 26.Qd1 Rad8 (26...Red8 27.Be2–/+) 27.Be2 Rd6 (27...Kg7 28.Qc2–/+) 28.Nh2=+ Bd7 29.Bf3 (29.Ng4 Bg4 30.Bg4 Red8=+ (worse 30...hg4 31.Rh6 Qg5 32.Rh4+=)) 29...h4 (29...c6 30.Qc2 cd5 31.cd5–/+) 30.Qe2 (30.Bg4 Qd8 31.Bd7 Qd7=) 30...hg3 31.fg3 (31.Ng4 Bg4 32.Bg4 Qg5 33.fg3 f5=+) 31...Qg7 (31...Qg5 32.Ng4 Bg7 33.Nf2–/+) 32.Bg4 (32.Ng4 Bg5=+) 32...f5 33.Bf3 (33.Bh3 Qf6=+) 33...Rf6 Black plans f4 (33...c6 34.bc6 Bc6 35.Kf1–/+) 34.Raf1 Ref8 (34...Qe7 35.Rf2–/+) 35.Qd3 (35.ef5!? Rf5 36.Ng4=) 35...Bg5 (35...Qe7 36.Qe2–/+) 36.Qe2 f4 (36...R6f7 37.Qe1–/+) 37.g4 (37.Ng4 Rd6=+) 37...Bh4 (37...Rd6 38.Qf2–/+) 38.Rfg1 Bg3 (38...Qh6!?–/+) 39.Nf1=+ Bh4?? (better 39...g5=+) 40.Rh3?? (better 40.Rh4 g5 41.Rh5+–) 40...g5–+ 41.Rgh1 Rh6 (41...Kf7 42.Nd2–/+) 42.Nh2 (42.Nd2!?–/+) 42...Kf7–+ 43.Nf1 Rfh8 44.Nh2 (44.Qb2 Ke8–+) 44...Be8 (44...Ke7 45.Nf1–+) 45.Nf1 Ke7 46.R1h2 (46.Qb2 Kd7–+) 46...Kd6 (46...Kd7 47.Nd2–+) 47.Kh1 (47.Qb2 Kd7–+) 47...Bd7 (47...Kd7 48.Kg2–+) 48.Qg2 Qf7 (better 48...Ke7–+) 49.Rh4? (better 49.Nd2–+) 49...Bc8 (better 49...Rh4 50.Rh4 gh4–+) 50.Rh6+– Rh6 51.Rh6 Ke7 52.Rh5 (52.Qh2 Bf5 53.gf5 Qe8 54.Re6 Kd8 55.Re8 Ke8 56.Qh8 Kd7 57.f6 c6 58.Qb8 cd5 59.Bg4) 52...Bf5 (52...Bd7 53.Qh3 Kd8 54.Rg5+–) 53.Qh2 (better 53.gf5 Qf6 54.Rh7 Kd8+–) 53...Bg6 54.Rh6 (54.Rg5 Qg7 55.Nd2 Ke8+–) 54...Kf6 (54...Qf6 55.Rh8 Qg7 56.Qh6 Qh6 57.Rh6+–) 55.Ng3! Kg7 (55...fg3 56.Qg3 Combination) 56.Nf5 Kg8 (56...Kf6 57.Rh8 Bf5 58.gf5 Qg7 59.Re8 g4 60.Qh4 Qg5 61.Qh8 Qg7 62.Re6 Kg5 63.Qg7 Kh4 64.Qg4) 57.Rh8 1–0. TwelveTeen (2615) – penguingim1, lichess.org, 2018.

5.Nf3 e5 6.d3 (6.g3 Nf6=) 6...Nf6= 7.e4 (7.g3 Nbd7=) 7...g6 8.Be2 (8.Nbd2 Nbd7=) 8...Bg7 9.0–0 (9.Nbd2 Nbd7=) 9...0–0 10.Nbd2 (10.Na3 Re8=) 10...Nbd7 11.h3 (11.Nc4 Re8=) 11...Nh5 (11...Nc5 12.Re1+=) 12.Kh2 (12.g3 Nc5=) 12...Nf4 13.g3 Ne6 (13...Ne2 14.Qe2 Nc5 15.Bc3+=) 14.Rg1 (14.Nb3 d5 15.Nfd2 de4 16.Ne4 f5–/+) 14...f5–/+ 15.ef5 (15.Re1–/+) 15...gf5 (better is 15...Rf5!? 16.Rf1 Ndc5–/+) 16.Nh4 (16.Nb3 Qf6+=) 16...f4 (16...Ndc5 17.Nb3+=) 17.Bg4= fg3 18.fg3 Nec5 (18...Rf2 19.Rg2 Rg2 20.Ng2=) 19.Qe2= Nf6 (19...Rf7 20.Ne4=) 20.Bf3 (20.Nf5!?+=) 20...Bf3= 21.Nhf3 Qe8 22.Ne4 (22.Rgf1 Qh5 23.Ne4 Nce4 24.de4 d5=) 22...Nce4 (22...Nfe4!? 23.de4 Qg6–/+) 23.de4= Kh8 (23...Qg6 24.Nd2=) 24.Raf1 (better is 24.Nh4!?+=) 24...Qg6+= The isolani on e4 becomes a target 25.Nh4 (better is 25.Qd3!? Qe4 26.Ne5 de5 27.Rf6 Qd3 28.Rf8 (28.cd3?? Rf6 29.Rg2 Rf3–+) 28...Rf8 29.cd3+=) 25...Qe4–+ 26.Qe4 (26.Rf2 Qa4 27.Rf3 Ne4–+) 26...Ne4 27.Nf5 Bf6 (27...Nc5!? 28.Ng7 Kg7–+) 28.Rg2 (28.g4!?–/+) 28...Nc5–+ 0–1. carrafurca (2310) – gtan (2360), net–chess.com, 2008.

5.Nf3 Nf6 6.Nc3=.

5.e3 Nd7

6.d4 e5 7.Nf3 ed4 (7...Qf6 8.d5=) 8.Nd4 (8.Bd4 Ngf6+=) 8...Ne7 9.Nd2 Nc5 10.N2f3 Nd5 11.Be2 Be7 12.Nf5 Bf6 13.Ng7 Bg7 14.Bg7 Rg8 15.Bd4 Rg2 16.Bd3 Nd3 17.Qd3 (17.cd3 Nb4=) 17...Nb4 (17...Rg6 18.Qe4 Qe7 19.Qe7 Ke7=+) 18.Qe2 (18.Qh7 Nc2 (18...Bf3? 19.Qh8 Kd7 20.Qh3 Ke8 21.Qf3+–) 19.Qc2 Bf3+=) 18...Nc2 (better 18...Be4!? 19.Kd2 Nc2–/+ (19...Bc2? 20.Ne1+–)) 19.Qc2= Bf3 20.Qh7 Qg5 21.Qh8 (21.Rf1 Rg4=+) 21...Qg8 (21...Kd7 22.Qh3 Qg4 23.Qg4 Rg4 24.Rf1–/+) 22.Qg8=+ Rg8 23.Rf1 0–0–0 (23...Rg6 24.h3=+) 24.Rc1= Kb7 25.Kd2 f5 (25...Rg2 26.h4=) 26.h4 (26.Rg1 c5 27.Bf6 Rde8=) 26...Rg2 27.Bf6 Re8 28.Bg5 (28.Rc4 Re4 29.Rd4 Reg4=) 28...Re4 (better 28...c5=+) 29.Bf4? (better 29.Bd8 Rg7 30.Ra1=) 29...Ra4–+ 30.Bg3 Ra2 (30...Be4 31.h5 Ra2 32.Kc3 Ra3 33.Kd2 Rd3 34.Ke2–+) 31.Kc3 (31.Rc2 Rc2 32.Kc2 c5–/+) 31...Be2 32.Rfe1 (32.Ra1 Bf1 33.Ra2 Bb5–+) 32...Bb5–+ 33.Kb3 (33.h5 Bc6–+) 33...Rd2 34.Rc3 (34.Rg1 Rg1 35.Rg1 a4 36.Kc3 Rd5–+) 34...Rd3 (34...c5 35.Ra1–+) 35.Rec1 (35.Rd3!? Bd3 36.h5–/+) 35...Rc3 36.Rc3 (36.Kc3 Be2–+) 36...Be8 37.Rc4? (37.Kb2 b5–+) 37...Rg1 (better 37...Bf7 38.Kc3 Bc4 39.Kc4 Rg1–+) 38.Rf4 Bg6 39.h5 (39.Ra4 Ka6–+) 39...Bh5 40.Rf5 Bg4 41.Rf7 (41.Rg5 Bf3–+) 41...Kc6 (better 41...Be6 42.Kb2 Bf7–+) 42.Bd6 (42.Kb2–+) 42...Kd6 (42...Kd6 43.Kb2 b5–+) 0–1. GuestKVBT – GuestYVCF, freechess.org, 2017.

6.Nf3 Nc5 7.Be2+= e5 8.d4 ed4 9.Bd4 Nf6 10.0–0 Be7 11.c4 0–0 12.Nbd2 d5 (12...Re8 13.Qc2=) 13.cd5 Nd5 14.Ne5 Bf6 15.Ndc4 Be5 16.Ne5 Qe7 17.Bf3 Rab8? (17...Rfd8 18.Rc1+=) 18.Rc1 (better 18.Bd5!? Bd5 19.Bc5 Qc5 20.Nd7+–) 18...Ne6+= 19.Ba1 Rfd8 20.Qc2 (20.Qe2 Nc5+=) 20...Nb4= 21.Qb1 f6 (21...Nc5!?=) 22.Bb7+= Rb7 23.Nc6 Nc6 24.Rc6 (worse 24.bc6 Rbb8=) 24...Rd6 25.Rfc1 Rc6 26.Rc6 Nd8 27.Rc1 c6? (27...Ne6+=) 28.Bd4?? (better 28.bc6 Rc7 29.Qb6 Nc6 30.Bc3+– (worse 30.Rc6 Rb7–/+)) 28...c5= 29.Bc3 Ne6 30.Rd1 Rd7 31.h3 Rd1 32.Qd1 Qd8 33.Qb3 Qd7 34.Qc4 Kf8 35.f4 Ke7 36.g4 (36.Kh2 Qd6+=) 36...Nc7 37.Kf2 Qd5 (37...Nd5 38.Qd3=) 38.Qd5 Nd5 39.Bd2 (39.Bd2 Nb4 40.Ke2=). BeepBeepImAJeep (2640) – tuanaumay, lichess.org, 2016.

6.Nf3 Nc5 7.Be2 Nh6 8.0–0 Ng4 9.h3 White fights for the Initiative 9...h5? (better 9...Nf6+=) 10.d4+– Ne4 11.Nbd2 (11.hg4 hg4 12.Nfd2 e6 13.Ne4 Qh4–/+) 11...e6 12.Ne4 (12.hg4 hg4 13.Ne4 gf3–+) 12...Be4 13.Nd2 (13.hg4 hg4 14.g3 Qg5–+ (14...gf3?! 15.Bf3 Bf3 16.Qf3=)) 13...Bg2? (better 13...Nf6+–) 14.Kg2+– (14.hg4?! Bf1 15.Bf1 d5=) 14...Qh4 (14...Nh6 15.d5 Qg5 16.Kh2 ed5 17.Nf3+–) 15.Bg4 (better 15.hg4 Qg5 16.Rh1+–) 15...hg4 16.Qg4 Qe7 17.c4 f5 (17...0–0–0 18.d5+–) 18.Qg6 Kd8 19.Nf3 Rh6 (19...Kc8 20.d5 Rh6 21.Qg3+–) 20.Qg5 Rf6 21.Rae1 Qf7 (21...Qe8 22.d5 e5 23.Kh1+–) 22.e4 (better 22.d5!? e5 23.Ne5 de5 24.Be5 Bb4+–) 22...Be7 23.ef5 Rf5 24.Qg3 Rf6 (24...Bf6 25.Re2+–) 25.Nh2 (better 25.Ng5 Qe8 26.Ne6 Kc8+–) 25...Rg6 26.Ng4 Kc8 27.f4 (27.Qf3 Qf3 28.Kf3 Kd7+–) 27...Qf5 28.Kh2 Qc2 (28...Bd8 29.Qf3 Kb8 30.Ne3+–) 29.Qg2 Qg2 30.Kg2 Kb7 (30...Kd7 31.f5 ef5 32.Rf5+–) 31.f5 (better 31.d5!? e5+–) 31...ef5 32.Rf5 Bf6 33.Ba1 Rh8 34.c5 (34.d5 Ba1 35.Ra1 Re8+–) 34...bc5 35.dc5 dc5 (35...Ba1 36.Ra1 Re8 37.cd6 Rd6 38.Rf7+–) 36.Bf6 (36.Rf6?! gf6 37.Bf6 Rf8+–) 36...gf6 37.Rf6 Rg7 (37...Rf6 38.Nf6 Rd8 39.Re7+–) 38.Rc6 (38.Ra6 Rd7+–) 38...Rg5 (38...Rd8 39.Ra6+–) 39.Rc1 (39.Re7 Rc8+–) 39...Rd8 40.R6c5 Rd2 41.Kg3 Rd3 42.Kh4 (better 42.Kh2 Rd2 43.Kg1 Rc5 44.Rc5+–) 42...Rg8 (42...Rc5 43.Rc5 Rd4+–) 43.Rc7 Kb8 44.Rh7 (44.Nf6 Rgd8+–) 44...Rd4 45.Rcc7 (45.Ra1 Rf8+–) 45...Ra4 46.Rb7 Kc8 (46...Ka8 47.Ra7 Kb8 48.Rhb7 Kc8 49.Rc7 Kb8 50.Re7+–) 47.Ra7 (47.Rhc7 Kd8 48.b6 Rh8 49.Kg5 Rg4 50.hg4 Rg8 51.Kf6 Rf8 52.Kg7 Rg8 53.Kg8 a4 54.Rb8) 47...Rag4 (47...Kb8+–) 48.hg4 Rg4 (48...Kb8+–) 49.Kg4 Kb8 50.Rag7 (50.Rag7 a4 51.Rh8) 1–0. BeepBeepImAJeep – RODRIGOROJASGARCIA1 (1710), lichess.org, 2018.

6.Nf3 e5 7.c4 Ngf6 8.Be2 g6 9.Nc3 Bg7 10.0–0 0–0 11.d4 e4 12.Nd2 Re8 13.Qc2 Pawn e4, live or die! 13...c5 (13...Qe7 14.Rab1+=) 14.d5 (14.bc6 Bc6 15.Rfb1 Qe7+–) 14...Qe7 15.h3 h5 (15...Bc8 16.Ra3+=) 16.Nd1 Bc8 17.f4 (17.Rb1 Ne5+=) 17...ef3 18.Rf3 Ne5 19.Rf1 Bh6 20.Qc3 Bf5 21.g4?? (better 21.Qc1=) 21...hg4–+ 22.hg4 Nfg4 (worse 22...Neg4 23.Bg4 Bg4 24.Qf6 Qf6 25.Bf6 Bd1 26.Rad1 Re3 27.Kf2+–) 23.Bg4 Bg4 24.Nf3?? (24.Nf2 Bf3 25.Nh3–+) 24...Bf3 (24...Nf3?! 25.Rf3 Kh7 26.Rf2–/+) 25.Rf3 Qg5 (better 25...Nf3 26.Kg2 Ne5–+) 26.Kf1 f6 (26...Qh4 27.Rf2 Qc4 28.Qc4 Nc4 29.Rh2 Nb2 30.Nb2–+) 27.Rf2 (27.Rh3 Qf5 28.Kg2 Qe4 29.Kf1 Bg5–+) 27...Qh5 (27...Ng4 28.Qd3 Qh5 29.Bc1–+) 28.Rg2 (28.Rf6 Qh3 29.Ke1 Qh4 30.Rf2 Nf3 31.Kf1 Nd4–+) 28...Kh7 (28...Ng4 29.Rg4 Qg4 30.Nf2–+) 29.Qc2 (better 29.Nf2 f5 30.Re1–+) 29...Qh3?? (better 29...Ng4 30.Ra3 Bg5 31.Rg4 Qg4–+) 30.Be5+= Re5 Increases the pressure on the backward pawn (better 30...fe5!? 31.Qg6 Kh8+=) 31.Qg6+– Kh8 32.Qf6 (32.Nf2 Qh5 33.Qf6 Kh7 34.Qd6 Rf8 35.Qd7 Kh8=) 32...Kh7+– 33.Qf7 (33.Qg6 Kh8 34.Nf2+=) 33...Kh8+= 34.Qf6 Kh7 35.Qf7 (35.Qg6 Kh8 36.Nf2+–) 35...Kh8= 36.Qf6 ½–½. AhmedSultanov (1890) – UTZ (1890), lichess.org, 2019.

6.Nf3 e5 7.Be2 Ngf6 8.c4 Be7 9.0–0 0–0 10.d4 Nc5?? (better 10...Bf3 11.Bf3 e4+–) 11.dc5+– bc5 12.Nc3 Nd7 13.Nd2 Bf6 14.Bf3 Rb8 (14...Bf3 15.Qf3 Nb6 16.Nd5+–) 15.Bb7 Rb7 16.Nd5 g6 (16...Nb6 17.Nb6 Rb6 18.Bc3+–) 17.Qf3 (17.Nb3 Ra7+–) 17...Bg7 (17...Ra7+–) 18.Ne7! Qe7 19.Qb7 Nf6 (19...Nb6 20.Bc3 e4 21.Ba5 Ba1 22.Bb6+–) 20.Nb3 Nh5 (20...Qe6 21.Na5 Ne8 22.Nc6 Qc4 23.a5+–) 21.Na5 f5 22.Nc6 Qg5 Black prepares f4 (22...Qf7 23.a5 Qc4 24.a6+–) 23.Qc7 f4 24.ef4 (better 24.Qd6 f3 25.Qe6 Kh8+–) 24...Nf4 The mate threat is Qxg2 25.g3 Ne2 26.Kg2 Qg4 Threatening mate... how? 27.f3 (27.Qd6?? Qf3 28.Kh3 Nf4 29.Kh4 Qh5) 27...Nf4 (27...Qc4 28.Rf2 Qb3+–) 28.Kh1 Qh3 Threatening mate... how? 29.gf4 Rf4 30.Qd6 Rf3 31.Qd5 (31.Qd5 Kh8 32.Qd8 Bf8 33.Be5 Kg8 34.Qd5 Qe6 35.Qe6 Rf7 36.Qf7) 1–0. BeepBeepImAJeep (2535) – boo24 (2260), lichess.org, 2017.

6.Nf3 e5 7.Be2 g6 8.0–0 Bg7 9.d4 Ne7 10.c4 0–0 11.Nc3 Nf5 12.de5 Ne5 13.Ne5 (13.Rb1 Nh4 14.Nh4 Qh4+=) 13...Be5= 14.Bf3 (14.Qd2 Qh4 15.f4 Bc3 16.Qc3 f6+=) 14...Bf3=+ 15.Qf3 Qh4 Do you see the mate threat? 16.g3 Qc4 17.Rfc1 Qe6 18.Rab1 Rae8 (better 18...Ne7!?=+) 19.Nd5+= Bb2 (19...Rc8 20.Be5 de5 21.Rc6+– (21.Rc7? e4 22.Qd1 Rcd8–+; 21.Nc7?! Qd6 22.Rc6 Qd3=)) 20.Rb2+– Qe5 (20...Rc8!?+–) 21.Rbc2+– Kg7 22.Rc7 Qe4 (22...Rb8 23.R1c6+–) 23.Qe4 Re4 24.Nb6 The passed pawn on b5 will quickly become a dangerous weapon 24...d5 25.Nd5 (25.Nd7 Rfe8 26.Nc5 Rb4+–) 25...Ra4 26.b6 Nd6 27.b7 Rb8 28.Rb1 Rc4 29.Rd7 Rc6 30.f3 a4 31.e4 a3 32.e5 (32.Ra1 Nb7 33.Ra3 Rc1 34.Kg2 Nc5+–) 32...a2?? (better 32...Rb7 33.Rbb7 Nb7 34.Rb7 a2=+) 33.Ra1+– Rb7 34.Rd6?? (better 34.Rb7 Nb7 35.Ra2+–) 34...Rd6 (34...Rb1 35.Kg2 Rc2 36.Kh3 Ra1 37.Nb4–+) 35.ed6 (35.Nc3 Rd3 36.Na2 Ra7–+ (36...Rf3?! 37.Rd1–+)) 35...Rb1 36.Kf2 Ra1 37.Nc3 (37.d7 Rh1 38.d8Q a1Q 39.Qf6 Qf6 40.Nf6 Kf6–+) 37...Rd1! 38.Na2 (38.Nd1 a1Q) 38...Rd2 39.Ke3 Ra2 40.d7 Ra8 41.Ke4 Rd8 42.Kd5 Rd7 43.Ke5 Rd8 44.Kf4 Re8 45.Kg4 (45.g4 h6–+) 45...Re6 46.f4 (46.Kf4 Kf6–+) 46...Re8 (46...Re2!? 47.h3 Rf2 48.Kg5–+) 47.Kf3 f6 48.g4 f5 49.g5 (49.h3 fg4 50.hg4 Kf6–+) 49...Kf7 50.h3 (50.Kf2 Ke6 51.Kf3 Rc8–+) 50...Ke6 51.Kg3 Kd5 52.Kf3 Re4 53.h4 Kd4 54.h5 Kd3 55.hg6 hg6 56.Kg3 (56.Kf2 Rf4 57.Kg1 Ke3 58.Kg2 Rg4 59.Kh3 Kf2 60.Kh2 Rh4) 56...Ke3 57.Kg2 Kf4 (57...Rf4 58.Kh2 Kf2 59.Kh3 Rg4 60.Kh2 Rh4) 58.Kh3 (58.Kf2 Kg4 59.Kg2 Re2 60.Kf1 Kf3 61.Kg1 Re1 62.Kh2 f4 63.Kh3 Rh1) 58...Kg5 (58...Kf3 59.Kh2 Re1 60.Kh3 Rh1) 59.Kg3 (59.Kg2 Kg4 60.Kf2 g5 61.Kg2 Re2 62.Kg1 Kf3 63.Kf1 g4 64.Kg1 Re1 65.Kh2 g3 66.Kh3 Rh1) 59...Rf4 60.Kg2 Rg4 (60...Kh4 61.Kh2 Rf2 62.Kh1 Kg3 63.Kg1 g5 64.Kh1 Rf1) 61.Kf3–+ Rf4 (61...Kh4 62.Kf2 Rf4 63.Ke2 Re4 64.Kd1–+) 62.Ke3?? (62.Kg2 Kg4 63.Kh2 Rf2 64.Kh1 Kg3 65.Kg1 g5 66.Kh1 Rf1) 62...Rg4 (62...Re4 63.Kd2 f4 64.Kd3 Kf5 65.Kd2 f3 66.Kd3 f2 67.Kc3 f1Q 68.Kd2 Qf2 69.Kd3 Qf3 70.Kd2 Re2 71.Kc1 Qf1) 63.Kd3?? (63.Kf3 Rd4 64.Ke3 Rd7 65.Kf3 f4 66.Ke4 Kg4 67.Ke5 f3 68.Kf6 f2 69.Ke6 Rd1 70.Kf7 f1Q 71.Ke7 Qe2 72.Kf7 Rd7 73.Kf6 Qf3 74.Kg6 Qc6) 63...f4 64.Kc4 f3 65.Kd5 (65.Kc3 f2 66.Kb3 f1Q 67.Kc2 Qf3 68.Kc1 Rg2 69.Kb1 Qd1) 65...Rf4 (65...f2 66.Kc6 f1Q 67.Kc7 Qc1 68.Kd6 Kf6 69.Kd5 Qc4 70.Kd6 Rd4) 66.Kd6 f2 67.Ke7 (67.Kd7 f1Q 68.Kc6 Qc4 69.Kb6 Rf6 70.Kb7 Qc6 71.Kb8 Rf8 72.Ka7 Ra8) 67...f1Q 68.Kd6 Qe2 (68...Qd3 69.Kc5 Rc4 70.Kb6 Qb3 71.Ka5 Ra4) 69.Kd7 (69.Kc6 Rc4 70.Kb6 Qe3 71.Ka5 Qb3 72.Ka6 Ra4) 69...Rf3 (69...Rc4 70.Kd6 Kf6 71.Kd5 Qd3) 70.Kc7 (70.Kd6 Rc3 71.Kd5 Kf5 72.Kd4 Qd3) 70...Rd3 (70...Rc3 71.Kd6 Kf6 72.Kd5 Qd3) 71.Kb7 (71.Kb6 Rc3 72.Ka7 Rb3 73.Ka8 Qa6) 71...Qc2 72.Ka7 Rb3 73.Ka6 Qa2 0–1. BeepBeepImAJeep (2720) – Leon_Livaic (2765), lichess.org, 2020.

6.Nf3 e6 7.Be2 Ngf6 8.0–0 g6 9.d4 Bg7 10.Nbd2 0–0 11.c4 Re8 12.Rc1 e5 13.de5 Ne5 14.Nd4 (14.Ne5 de5 15.c5 bc5 16.Rc5 Nd7+=) 14...Nfd7 (14...Ne4 15.Ne4 Be4 16.f3=) 15.N2f3 (15.f4 c5 16.fe5 cd4 17.ed4 de5 18.c5 bc5 19.dc5 Nc5 20.Rc5+–) 15...Nc5=+ 16.Ba3 Nf3 (16...Qe7 17.h3=+) 17.Bf3= Bf3 18.Qf3 (better 18.Nf3!? Ne4 19.Nd4=) 18...Na4–/+ 19.Nc6 Qd7 20.Rfd1 Nc3 21.Rd2 (21.Rd3 Ne4=+) 21...Ne4–/+ 22.Rd3 f5 (22...Qe6 23.Qd1–/+) 23.Rcd1 (23.c5 bc5 24.Bc5 Bb2–/+) 23...Qf7 24.Rd5? (better 24.Rc1–/+) 24...Nc3–+ 25.R1d3 Nd5 26.Rd5 (26.cd5 f4–+) 26...a4 27.g3 Rac8 (27...Qf6 28.Nd4–+) 28.Qd1 (28.Na7 Rcd8–+) 28...Re4 (better 28...Qf6!? 29.Nd4 Ra8 30.h3–+) 29.Qa4 Qd5 (better 29...Bf6 30.Qb3 Ra8–+) 30.Ne7= (30.cd5?? Ra4 31.Bd6 Kf7–+) 30...Re7 31.cd5 Ree8 32.Qc4 Re7?? (better 32...Ra8 33.Qc6 Rf8=) 33.Bd6!+– Rd7 (33...cd6 A pinning theme 34.Qc8) 34.Bf4 Kh8 35.h4 (35.d6 Rdd8 36.dc7 Re8+–) 35...h6? (better 35...Rf8+–) 36.d6! Kh7 (36...cd6 Exploits the pin 37.Qc8 A double attack) 37.dc7 Bf8 (37...Rd1 38.Kg2 Rd7 39.Qe6 Rcc7 40.Bc7 Rc7 41.h5 gh5 42.Qf5 Kh8 43.Qe6+–) 38.Qc6 Rd1 (38...Re7 39.Qb6 Rf7 40.Qb7 Rcc7 41.Bc7+–) 39.Kg2 Bc5 (39...Bg7 40.h5 gh5+–) 40.h5 gh5 41.Qh6 Kg8 42.Qe6 Kg7 43.Qc8 Bd6 (43...Kf6 44.Qh8 Kf7 45.c8Q Rg1 46.Kg1 Bf8 47.Qhf8 Kg6 48.Qcf5) 44.Bd6 (44.Qd7 Kg6 45.Qe6 Kg7 46.c8Q Rg1 47.Kg1 Bf8 48.Qh6 Kf7 49.Qcf8) 44...Rd6 (44...Rd3 45.Qf8 Kg6 46.c8Q Rd5 47.Qe6 Kh7 48.Qeg8) 45.Qd8! Rd8 46.cd8Q (46.cd8Q Kf7 47.Qc7 Ke8 48.Qb6+–) 1–0. BeepBeepImAJeep (2735) – banteng_kelana (2350), lichess.org, 2019.

6.Nf3 Ngf6 7.d4 g6 (7...e6 8.Bd3=) 8.Nbd2 Bg7 9.c4 0–0 10.Bd3 Re8 (10...e5 11.Qc2=) 11.0–0 e5 12.Bc2 (12.Be2 ed4 13.ed4 Nh5=) 12...e4 (12...ed4 13.Bd4 Nc5 14.Re1=) 13.Ne1 h5 (13...d5 14.Bb3=) 14.d5 (14.Qe2 h4+=) 14...Ne5 (14...h4 15.Bd4+=) 15.Qe2 Neg4 (15...Bc8 16.Ne4 h4 17.Nf6 Bf6 18.Rb1+–) 16.h3 (16.Rc1 Bc8+–) 16...Nh6 (16...Ne5 17.Rd1+=) 17.Rd1 Bc8 18.Bf6 Bf6 19.Ne4 Bg7 20.Ng3 (20.Bd3 f5 21.Nd2 h4+–) 20...Bd7 (20...Qe7 21.Qf3+–) 21.e4 (21.Bd3!?+–) 21...h4+= 22.Nh1 f5 23.f3 Qg5 24.Nf2 fe4 25.fe4 Be5 (25...Nf5!? 26.Qg4 Qg4 27.Ng4 Ng3 28.Nf6 Bf6 29.Rf6 Kg7+=) 26.Nf3+– Qg3 27.Ne5 (27.Nh1 Qf4+–) 27...Re5 (27...Qe5 28.Rd3+–) 28.Nh1 (28.Qd2 Nf7+–) 28...Qg5 29.Rf3 Rae8 (29...Nf7 30.Rdf1 Re7 31.Rf4+–) 30.Rdf1 Kg7 (30...Rf5 31.Qf2 Rf3 32.Qf3+–) 31.Nf2 (31.Qf2 Bc8+–) 31...Qe7 32.Kh1 (32.Qd3 g5+–) 32...Rg5 (better 32...Rf5+–) 33.Rf4?? (33.Qe3 Kh7+–) 33...Nf7?? (better 33...Nf5 34.Qd1 Ng3 35.Kg1 Nf1 36.Qf1 Rf8 37.Rf8 Qf8=+) 34.Qf3 (better 34.Qe1!?+–) 34...Ne5 35.Qe3 (35.Qd1!?+=) 35...Rg3= 36.Qe2 (36.Qd4 Qg5 37.Ng4 Bg4 38.Rg4 Rg4 39.hg4 Rf8 40.Rf8 Kf8=+) 36...Qg5=+ 37.Rg4? (better 37.Nd3 Bh3 38.Ne1=+) 37...Bg4–+ (37...Rg4?! 38.Ng4 Bg4 39.hg4 Qg4 40.Qf2=+) 38.hg4 h3 (better 38...Qe3 39.Qe3 Re3 40.Kg1–+) 39.gh3? (39.Nh3 Rh8 40.c5–+) 39...Qh4 40.Kh2 (40.Bd1 Rf8 41.g5–+) 40...Nf3 (40...Rh8 41.Kh1 Nf3 42.e5 Rh3 43.Nh3 Qh3 44.Qh2 Qh2) 41.Qf3 Rf3 42.Bd1 (42.g5 Rf2 43.Rf2 Qf2 44.Kh1 Rh8 45.e5 Rh3) 42...Qg3 (42...Rf2 43.Rf2 Qf2 44.Kh1 Rh8 45.e5 Rh3) 43.Kh1 Rf2 44.Rg1 (44.Rf2 Qf2 45.Bf3 Qf3 46.Kh2 Qf2 47.Kh1 Re4 48.c5 Re1) 44…Qh2 (44...Qh3) 0–1. TwelveTeen (2650) – penguingim1, lichess.org, 2018.

5.e3 e5

6.Nf3 Nd7 7.c4 Ngf6 8.h3 g6 9.Be2 Bg7 10.0–0 0–0 11.d4 e4 12.Nh2 h5 13.d5 Nc5 14.Bd4 Qe7 15.Ra3 Rae8 16.Nd2 Nh7 (16...Bc8 17.f3=) 17.Bg7+= Kg7 18.Qa1 (18.Nb3 Nb3 19.Rb3 Bc8=) 18...Kg8 19.Qd4 f5 20.Nb3 Nb3 21.Rb3 Bc8 22.Rd1 f4 23.ef4 Rf4 24.Rg3 Qf7 (24...Ng5+=) 25.Qe3 (better 25.Bh5 Bf5 26.Qe3+–) 25...Kh8 26.Rg6 Qg6 27.Qf4 Rg8 (27...Bh3 28.Qg3 Qg3 29.fg3=) 28.g4+= hg4 (28...Ng5 29.Qg3+=) 29.hg4+– Ng5 30.Kh1 (30.Kf1 Kg7+–) 30...Nf7 (30...Kg7 31.Rf1+=) 31.Rg1 Ne5 32.g5 (32.Rg3!?+–) 32...Kg7+= 33.f3 Rf8 (better 33...Bf5=) 34.Qh4?? (better 34.Qe4 Qe4 35.fe4+–) 34...ef3–/+ (34...Nf3?! 35.Bf3 ef3 36.Rf1=) 35.Bf1 (35.Bf3 Rf3 36.Nf3 Nf3 37.Qh6 Qh6 38.gh6 Kh6–+) 35...f2 (35...Rh8!? 36.Qh6 Qh6 37.gh6 Kf6–+) 36.Rg2–/+ Nf3?? (36...Qh7 37.Qd4 Bf5 38.Rf2 Be4 39.Kg1–/+) 37.Nf3?? (better 37.Qh6 Qh6 38.gh6 Kh6 39.Rf2+–) 37...Rf3 (37...Rh8!? 38.Qh8 Kh8–/+) 38.Rf2 Rf2 39.Qf2 Bf5 (39...Qg5 40.Qb2 Qf6 41.Qg2 Qg6 42.Bd3 Qg2 43.Kg2=) 40.Qg2?? (better 40.Qd4 Kf7 41.Qh4+=) 40…Be4–+ 0–1. Abdullaevich (1915) – chessjedi_number421 (1990), lichess.org, 2020.

6.Nf3 f5 7.c4 Nf6 8.Be2 Be7 9.0–0 0–0 10.d4 e4 11.Nfd2 d5 12.Nc3 dc4 13.Nc4 Nbd7 14.Ne5 Ne5 15.de5 Nd5?? (better 15...Nd7+=) 16.Bc4+– Kh8 17.Nd5 Bd5 18.Qd5 Bc5 19.Qd8 Rad8 20.Rfd1 h6 21.Kf1 g5 (21...f4 22.ef4 Rd1 23.Rd1 Rf4 24.Rd8 Kh7 25.Bd4 Bd4 26.Rd4+–) 22.Ke2 (22.e6 Kh7+–) 22...Kg7 (22...Kh7 23.Rac1+–) 23.Rd8 (23.e6!? Kg6+–) 23...Rd8 24.Rd1 Rd1 25.Kd1 Kf8 (25...h5 26.Bd5+–) 26.Bd4 (26.Be6!? f4+–) 26...Ke7 27.Bc5 bc5 28.Kc2 c6 (28...Kd7+–) 29.b6 (29.b6 Kd8 30.b7+–) 1–0. BeepBeepImAJeep (2600) – x_Gabi_M (2135), lichess.org, 2018.

6.Nf3 Nf6 7.Be2 Be7 8.0–0 0–0 9.c4 Re8 10.d4 e4 11.Nfd2 Bf8 12.Nc3 g6 (12...Nbd7 13.Qc2+=) 13.f3 (13.Rb1 Qe7+=) 13...ef3+= 14.Bf3 Bh6?? (better 14...d5 15.Qe1 Bh6+=) 15.Bb7+– Be3 16.Kh1 Ra7 17.Bd5 (better 17.Nde4!? Ne4 18.Be4 f5+–) 17...Bd4 18.Nf3 Bc5 (18...Bc3 19.Bc3 Nbd7+–) 19.Ng5 Rf8 (19...c6 20.bc6 Nd5 21.Nd5 Qg5 22.Nf6 Qf6 23.Bf6 Nc6+–) 20.Nf7 Rf7 21.Bf7 Kf7 22.Nd5 Nbd7 23.Nf6 Nf6 24.Qd5 Kg7 25.Bf6 (25.Rf6 Qf6 26.Bf6 Kf6 27.Rf1 Kg7 28.Qf7 Kh6 29.Qf4 g5 30.Qf6 Kh5 31.Qf7 Kh4 32.Qh7 Kg4 33.Qh3) 25...Qf6 26.Rf6 Kf6 27.Rf1 Kg7 28.Rf7 Kh6 29.Qd2 g5 (29...Be3 30.Qe3 Kh5 31.Rh7 Kg4 32.h3 Kf5 33.Rf7) 30.Rf6 (30.Rf6 Kh5 31.Qd1 g4 32.Qd5 Kh4 33.Rh6; 30.Qd3 g4 31.Qh7 Kg5 32.Rf5) 1–0. BeepBeepImAJeep (2665) – lucliasco (2580), lichess.org, 2019.

6.Nf3 h6 7.Be2 Qf6 8.0–0 h5 9.c4 Nh6 (9...Nd7 10.Nc3+=) 10.h3 (10.Nc3 Qf5+–) 10...Nf5 (10...g5 11.d4 Nd7 12.Nc3=) 11.d4 e4 (11...Nd7 12.Nc3 0–0–0 13.Nd5+=) 12.Nfd2+– Nh4 13.Qc2 (worse 13.Bh5 Qg5 14.Bg4 f5=+) 13...Qg5 14.g3 Nf3 (14...f5 15.d5 Kd8 16.Nb3+–) 15.Nf3 ef3 16.Bd3 Bc8 (better 16...h4!? 17.g4 Nd7+–) 17.Be4 Ra7 18.Bf3?? (better 18.h4 Qf6 19.Nd2+–) 18...Bh3= 19.Qe4 Be7 20.Kh2?? (better 20.Re1=) 20...0–0?? (better 20...Bf1 21.Nd2 Bc4 22.Nc4 h4–+) 21.Kh3+– f5 (21...Nd7 22.Qc6 Nf6 23.Nc3+–) 22.Qd5 Kh8 23.Kg2 h4 24.Rh1 Qg6 25.Rh4 (better 25.Nc3+–) 25...Bh4 26.Nd2 f4?? (better 26...Bg5+–) 27.ef4 (27.Rh1 Rf7 28.Bh5 c6 29.bc6 Qf5 30.Bf7 Rf7 31.Qf5 Rf5+–) 27...Rf5 (27...c6 28.bc6 Rf4 29.Re1+–) 28.Qe4 (better 28.Be4 Rd5 29.Bg6 Be7+–) 28...Nd7 (28...Kg8+–) 29.Rh1 Nf6 (29...Kg8+–) 30.Rh4 Kg8 (30...Nh7 31.d5 Ra8+–) 31.Qe6 (31.Qe6 Qf7 32.Rh8 Kh8 33.Qf7+–) 1–0. DEFFM – GuestDPMT, freechess.org, 2018.

4.Bb2 e6

5.c4 f6 6.d4 (6.Nf3 Kf7=) 6...Qe7 (6...Bb4 7.Bc3=) 7.Ba3 (7.Nf3 Qd8+=) 7...Qf7 (7...d6 8.Nc3=) 8.Qb3 (8.Bf8 Qf8 9.e3 Qe7=) 8...d5 (8...Ba3 9.Na3 e5 10.Nf3=) 9.e3 (9.Bf8 Qf8 10.Nd2 dc4 11.Qc4 Qd6+=) 9...dc4 10.Qc4 (worse 10.Bc4 Ba3 11.Na3 Bg2 12.Be6 Qh5 13.Bg8 Bh1=+) 10...Bd5 (10...Bd6 11.Nf3+=) 11.Qc3 Ba3 12.Ra3?? (12.Na3 Qe7+=) 12...Qe7?? (better 12...Qg6 13.Nd2 Bg2 14.Bg2 Qg2 15.Qc7 Ne7–+ (15...Qh1?! 16.Qc8 Ke7 17.Ndf3=)) 13.Nd2+= Qb4 (better 13...Nd7+=) 14.Bd3?? (14.f3 Nd7+=) 14...c5 (better 14...Bg2 15.Be4 Be4 16.Ne4 Qb1 17.Ke2 Qe4 18.Qc7 Ne7–+) 15.Ne2 (15.e4 cd4 16.Qc8 Ke7 17.ed5 Qa3 18.d6 Qd6 19.Qb7 Nd7 20.Qa8 Qa3+–) 15...Nd7 (15...cd4 16.Nd4 f5 17.f3+–) 16.0–0 (16.e4 Bb7+=) 16...Rc8 (16...cd4 17.ed4 Ne7 18.Rb1+=) 17.Rb1 (17.e4 Bb7 18.Nc4 cd4 19.Qb4 ab4 20.Nd6 Kf8+=) 17...Qc3 18.Rc3 Ne7? (better 18...e5!?+=) 19.e4+– Bb7 20.f3?? (20.Nc4 cd4 21.Nd4 0–0 22.Ne6 Rfe8+–) 20...0–0 (20...cd4 21.Rc8 Bc8 22.Nd4=) 21.h4 (better 21.Bc4 Kf7 22.Nf4 cd4 23.Be6 Ke8 24.Rc4 Rc4 25.Nc4+–) 21...cd4= 22.Rc8 Rc8 (22...Bc8 23.Nd4 Nc5 24.Bc4=) 23.Nd4 (23.Bc4 Kh8 24.Nd4 Nc5 25.Be6 Rd8+–) 23...Nc5 (23...Ne5 24.Be2 Rd8+=) 24.Bc2 (24.Bc4 Kh8 25.Ne6 Na4+=) 24...Rd8= 25.N2b3 Na4 26.Ne6 Nc3?? (better 26...Rd6 27.Nbd4 Nc3=) 27.Nd8+– Nb1 28.Bb1 Bc8 29.Nd4 Bd7 (29...Kf8 30.N8e6 Be6 31.Ne6 Kf7 32.Ba2+–) 30.N8e6 (30.Ba2 Kf8+–) 30...a4 (30...Be6 31.Ne6 Nc8 32.Ba2+–) 31.Ba2 (better 31.Bc2 a3 32.Bb3+–) 31...a3 (31...Kh8+–) 32.Nc5 Kf8 (32...Be6 33.Nce6 Kf7 34.Nc2+–) 33.Nd7 Ke8 34.Nb6 Ng6 35.g3 (35.Nd5 Kd7 36.Nf5 Kc8+–) 35...Nf4 (35...Ne5 36.Nd5 Kd7 37.Kf2+–) 36.gf4 (36.gf4 Kd8 37.Ne6 Ke7 38.Nd5 Ke6 39.b6+–) 1–0. afsharian – AlejandroPinglo, lichess.org, 2018.

5.c4 Nf6 6.e3 Be7 7.Nf3 0–0 8.Be2 d5 9.0–0 Nbd7 10.d4 Rc8 11.Nbd2 c5 12.Rc1 cd4 13.Nd4 Nc5 14.Ba3 Re8 15.cd5 Bd5 16.Bf3 Bf3 17.N2f3 Qd5 18.Nc6 Bf8 19.Nfd4 (19.Qc2 Qe4 20.Bc5 Bc5 21.Qe4 Ne4+=) 19...Qa2 20.Ra1 Qc4 21.Bc5 Bc5 22.Rc1 Qa2 23.Qc2 Qc2 24.Rc2 Bd4? (better 24...Rc7+=) 25.Ne7!+– (25.Nd4 Rc2 26.Nc2 Rc8–/+; 25.ed4?! Nd5+=) 25...Kf8 (25...Re7 Deflection from c8 26.Rc8) 26.Nc8 Bc5 27.Na7 Nd5 28.Nc6 f5 29.Na5 (29.Rfc1 Ba3 30.Rd1 Bc5+–) 29...Be3 30.fe3 Ne3 Theme: Double Attack 31.Re2 (31.Rc7 ba5 32.Re1 f4+–) 31...Nf1 32.Nc6 (32.Kf1?! ba5 33.Rc2 Rd8=) 32...Ra8 (32...Nh2 33.Kh2 Kf7+–) 33.a5 ba5 34.b6 (34.b6 Ra6 35.b7+– (35.Kf1?! Rb6 36.Na5 Ke7+–); worse 34.Kf1 Rc8 35.Re6 Rc7+–) 1–0. BeepBeepImAJeep – TrickOrTreat (2520), lichess.org, 2017.

5.c4 Nf6 6.e3 Be7 7.Nf3 0–0 8.Be2 d6 9.0–0 Nbd7 10.d4 Re8 11.Nc3 Bf8 12.Nd2 e5 13.Bf3 Qc8 14.Bb7 Qb7 15.Nf3 (15.d5 Be7+=) 15...e4 16.Nd2 d5 17.Rc1 dc4 18.Nc4 Nd5 19.Nd5 Qd5 20.Nd2 (20.Ne5 Ne5 21.de5 Qa2+=) 20...Rac8 21.Qc2 Bd6 22.Qc4 Qh5 The mate threat is Qxh2 23.g3 (23.h3 Nf6=) 23...Nf6=+ 24.Qc6 Qh3 Threatening mate: Ng4 25.Rfd1 Ng4 Threatening mate: Qxh2 26.Nf1 (26.Ne4?? Re4 27.Rc2 Qh2 28.Kf1 Rce8–+) 26...h5 (26...Rcd8 27.d5=) 27.Qd7 (27.Rd2 Rcd8=) 27...h4 (27...Rcd8 28.Qf5=+) 28.Rc6 (better 28.Qf5!?=) 28...hg3 29.hg3 Rcd8 30.Qf5 Re6 (better 30...g6 31.Qg5 Kg7=+) 31.Qg5?? (better 31.d5!? Ree8 32.Bc3=) 31...Rd7 (better 31...Rh6 32.Qh6 Nh6–+) 32.d5–/+ Do you see the mate threat? 32...Rh6?? (better 32...Rg6 33.Qf5 Nf2 34.Qh3 Nh3 35.Kg2 Ng5–/+) 33.Qg7 1–0. BeepBeepImAJeep (2575) – Scrooge (2325), lichess.org, 2017.

5.e3 a5 6.Nf3 (6.h3 Nf6 (6...d5 7.Bd3 Nd7 8.Nc3 e5 9.Bf1 Ngf6 10.Nf3 Bc5) 7.Nf3 d5 8.Nc3 Nbd7 9.Bd3 Bd6 10.0–0 0–0; 6.Nc3 d5 7.f4 Nf6 8.Nf3 Nbd7 9.Bd3 Bd6 10.0–0 0–0) 6...Nh6 (6...d5 7.Nc3 Nf6 8.Bd3 Nbd7 9.0–0 Bd6 10.Ba3 Ba3; 6...Nf6 7.Nc3 d5 8.g3 Nbd7 9.Bg2 Bd6 10.0–0 0–0; 6...h6 7.Bd3 Nf6 8.0–0 Bd6 9.Na3 Ne4 10.Nc4 0–0; 6...Ne7 7.Nc3 Nf5 8.Bd3 Bb4 9.0–0 0–0 10.Ne4 d5; 6...h5 7.Nc3 Bd6 8.Bd3 Nf6 9.0–0 0–0 10.h3 Qe7) 7.Be2 (7.Bd3 Nf5 8.Nc3 Be7 9.e4 Nh4 10.Nh4 Bh4) 7...c6 (7...Nf5 8.Nc3 Bb4 9.0–0 0–0 10.Bd3 Qf6) 8.0–0 Bd6 (8...Nf5 9.e4 Nh4 10.Na3 Bc5) 9.Bg7 (9.Na3 0–0 10.Nc4 Bc7) 9...Rg8 10.Bh6 cb5?? (10...Qf6 11.Nc3 Qh6 12.bc6 Bc6 13.g3+/–) 11.ab5 (11.Nc3 Qf6 12.Nb5 Bh2 13.Kh2 Qh6 14.Kg1 Qh3 15.Nc7 Ke7–/+) 11...Rg6?? (better is 11...Qf6 12.Bf4 Bf4+/–) 12.Bf4+– Bf4 13.ef4 Bf3 14.Bf3 Ra7 15.g3 Rc7 16.Nc3 Rc5 17.Na4 (17.f5 Rg8 18.fe6 de6+–) 17...Rb5 18.Rb1 Rb1 19.Qb1 Nc6 20.Nb6 Nd4 21.Be4 f5 22.Bd3 Nf3 23.Kg2 Nd2 24.Qb5 (better is 24.Qb2 Qc7 25.Qh8 Kf7 26.Qh7 Rg7 27.Qh5 Rg6 28.Rd1 Qc6 29.f3 Qb6 30.Rd2+–) 24...Nf1 25.Kf1 e5? (25...Qc7+–) 26.Qe5 Re6 (26...Qe7 27.Qa5 Rh6+–) 27.Qh8 (27.Qh8 Ke7 28.Nd5 Kd6 29.Qd8 Kd5 30.Qd7 Kc5 31.Qe6+–) 1–0. valpa – footyhead, playchess.de, 2003.

5.e3 ab5 6.ab5 Ra1 7.Ba1 Nf6 8.Nc3 d5 9.Nf3 Nbd7 10.Bb2 Bd6.

5.e3 c6 6.Nf3 cb5 7.ab5 Nf6 8.c4 Be7 9.Nc3 d5 (9...0–0 10.Be2=) 10.cd5 Bd5 11.Nd5 Qd5 12.Qc2 (12.Bf6 Bf6 13.Ra4 0–0=) 12...0–0 (12...Nbd7 13.Bc4 Rc8 14.Rc1=) 13.Bc4 Qb7 14.Ng5 (14.Bf6 Bf6 15.d4 Rc8+=) 14...g6 (14...Nbd7 15.0–0=) 15.Nf3 Nbd7 16.Qb3 (16.0–0 Rfc8+=) 16...Rac8 (16...a4 17.Qc3= (worse 17.Ra4 Nc5 18.Ra8 Nb3 19.Rf8 Kf8 20.Bf6 Bf6 21.Bb3 Qe4–/+)) 17.0–0+= Nc5 18.Qa2 Nfe4 (18...Rfd8 19.Bd4+=) 19.d4+– Nd7 20.Be6?? (20.d5 Nd6 A) 21.de6?! Nc4 (worse 21...Rc4 22.ed7 Qd7 23.Ne5 Qb5 24.Nc4 Nc4 25.Bc3+=) 22.ed7 Qd7=; B) 21.Bb3+–) 20...fe6–/+ 21.Qe6 Rf7 22.Ne5? (better 22.Rfc1!? Rc1 23.Rc1=+) 22...Ne5–+ 23.Qe5 Bf6 (23...Nf2 24.d5 (24.Rf2?? Rf2 25.d5 Rb2 26.Qb2 Qd5–+) 24...Bf6 25.Qe6 Bb2 26.Rf2 Ba1 27.Rf7 Qf7 28.Qc8 Kg7 29.d6–+) 24.Qe6 Rc2 25.f3? (better 25.Qb3 Re2 26.f3–+) 25...Nd2 (25...Rb2?! 26.fe4 Bg5 27.Qe8 Kg7 28.Kh1–+) 26.Rfc1 (26.Ba3 Nf1 27.Rf1–+) 26...Rb2 27.Rc8 (27.Ra2 Ra2 28.Qa2 Nf3 29.gf3 Qf3–+) 27...Kg7 28.Rac1 (28.Qc6–+) 28...Nf3! 29.gf3 Qf3 30.R8c2 Rc2 31.Rc2 Qd1 32.Kg2 Qc2 (32...Qc2 33.Kf3 Bh4 34.Kg4 h5 35.Kh3 Rf3 36.Kh4 Qh2 37.Qh3 Qh3 38.Kg5 Qg4) 0–1. AhmedSultanov (1825) – srbija (1780), lichess.org, 2020.

5.e3 d5 6.Nf3 Nf6 7.c4 c6 8.Nc3 Bb4 9.Qb3 (9.bc6 Nc6 10.cd5 ed5=) 9...Nbd7 10.Be2 (10.bc6 Bc6 11.cd5 Nd5=) 10...Nc5 11.Qc2 0–0 12.0–0 Qc7 (12...dc4!? 13.bc6 Bc6=) 13.d4 (13.cd5 cd5 14.Na2 Qe7+=) 13...Nce4 14.Ne4 (14.bc6 Bc6 15.Ne4 de4+= (15...Ne4? 16.cd5 ed5 17.Ne5+–)) 14...Ne4 (14...de4 15.Ne5=) 15.Ne5 (15.cd5 ed5 16.bc6 Qc6 (16...Bc6? 17.Rfc1+–) 17.Qc6 Bc6+=) 15...f6 (15...cb5 16.ab5 f6 17.Nc6=+) 16.Nd3 (16.cd5!? fe5 17.Qe4 cd5 18.Qg4+= (worse 18.Qe5 Qc2=)) 16...cb5 (16...Bd6 17.Nf4 Bf4 18.ef4 cb5 19.ab5 dc4 20.f5=+) 17.ab5 (17.Nb4 ab4 18.ab5 b3=) 17...dc4 (better 17...Bd6!? 18.Nf4 Rfc8=+) 18.Nb4+= ab4 19.Qc4 (19.Ra8 Ra8 20.Bc4 Bd5=) 19...Qc4 20.Bc4 Nd2?? (20...Bd5 21.Bd3 Nd6=) 21.Rfc1?? (better 21.Be6 Kh8 22.Ra8 Ra8 23.Rc1+–) 21...Rac8?? (better 21...Nc4 22.Rc4 Ra1 23.Ba1 Ra8=+) 22.Be6+– Kh8 23.Bc8 Rc8 24.Rc8 Bc8 25.Rc1 (better 25.Ra8 Kg8+–) 25...Be6 (25...Bf5 26.Rc6 Kg8 27.Rb6+–) 26.Rc6 Bf7 (26...Bd5 27.Rd6 g5 28.Rd5+–) 27.Rb6 Nc4 (27...h6 28.Rc6 Bd5+–) 28.Rb8 Bg8 29.Bc1 (better 29.b6 Nb6 30.Rb6 h5+–) 29...b3 30.Rc8 (30.b6 Nb6 31.Rb6 f5+–) 30...b2 (30...h6+–) 31.Bb2! Nb2 (31...h5+–) 32.b6 Nc4 33.b7 Nd6 34.b8Q Nc8 35.Qc8 (35.Qc8 f5 36.d5+–) 1–0. AhmedSultanov (1660) – sidezh2 (1630), lichess.org, 2019.

5.e3 Bd5 6.c4 Be4 7.d3 Bf5 8.Qf3 d5 9.cd5 Bb4? (9...Qd5 10.Nd2 Bg6 11.Qd5 ed5 12.Ngf3+=) 10.Bc3?? (better is 10.Nd2!? Qg5 11.de6+–) 10...Bc3 (10...Qf6!? 11.Ra3 ed5 12.Qd5 c6 13.bc6 Qc6 14.Qf5 Ba3 15.Qe5 Be7 16.Qg7 Bf6 17.Bf6 Qf6 18.Qf6 Nf6+/–) 11.Nc3+– Nd7 12.e4 Ne5? (12...Bg6 13.de6 fe6 14.d4+–) 13.Qf4 (13.Qg3 Ng6+–) 13...Qf6? (13...Qd6 14.Qg5 Bg6 15.d4+–) 14.Rc1 (better is 14.d4!? Ng4 15.ef5 Qf5+–) 14...Bg4 15.Qf6 gf6 (15...Nf6 16.h3 Bh5+–) 16.h3 Bh5 17.g4 Bg6 18.f4 Nd7 19.de6 (better is 19.f5!? ef5 20.ef5 Ne7+–) 19...fe6 20.Bg2 Nc5 21.d4?? (better is 21.Rd1+–) 21...Nd3+= 22.Kd2 Nf4 (better is 22...Nc1!? 23.Kc1 Rd8+=) 23.Bf1+/– 0–0–0 24.Ke3 e5 25.d5 (better is 25.de5 fe5 26.Nf3+–) 25...c6?? (better is 25...Kb7+/–) 26.bc6+– h5 (26...Ne7 27.Ba6 Kb8 28.Nge2 Be4 29.Ke4 (29.Ne4?! Nfd5 30.Kf3 Rhf8+–) 29...Nfd5 30.Nd5 Nd5 31.Rhd1+–) 27.Nge2 (better is 27.Ba6 Kb8 28.Nb5 Ne7 29.c7 Ka8 30.cd8R Rd8+–) 27...hg4 28.Nf4 ef4 29.Kf4 Nh6 (29...Rh4 30.Ba6 Kb8 31.Nb5 gh3 32.Kg3+–) 30.hg4 Nf7 (30...b5 31.ab5 Kc7+–) 31.Bg2 (better is 31.Ba6 Kb8 32.Rh8 Rh8 33.Nb5+–) 31...Nd6 32.Rh8 Rh8 33.Rh1 Rh1 34.Bh1 Be8 (34...Nf7 35.Nb5+–) 35.e5 fe5 36.Ke5 Kc7 37.Bf3 (better is 37.Nb5 Nb5 38.ab5 Kd8+–) 37...Nf7 38.Kf6 Nd6 39.g5 Nc4 (39...Bf7 40.Nb5 Nb5 41.ab5 Kd6 42.Kf7 a4+–) 40.g6 Nd6 41.g7 Bf7 42.Nb5 Nb5 43.Kf7 Nd6 (43...Nd4 44.g8Q Nf5 45.Ke6 Nd4 46.Kf6 b5 47.d6 Kb6 48.c7 Kc5 49.Qd5 Kb4 50.Qd4 Kb3 51.Bd5 Kc2 52.Ba2 b4 53.c8Q) 44.Kf8 (44.Kf8 Nc8 45.g8Q+–; 44.Ke6 Kb8 45.g8Q Kc7 46.Qg7 Nf7 47.Qf7 Kc8 48.Qd7 Kb8 49.Qb7) 1–0. Hal1958 – Foxcar, playchess.de, 2004.

5.e3 f5 6.Nf3 Nf6 7.c4 Be7 8.Be2 0–0 9.0–0 d5 10.d4 Ne4 11.Nbd2 Nd7 12.Rc1 Ndf6 (12...Rc8 13.cd5 ed5 14.Qb3+=) 13.Ne5 Bd6 14.Ndf3 Ng4 15.h3 (15.Ng4 fg4 16.Ne5 g3 17.hg3 Be5 18.de5 Qg5+–) 15...Ne5= 16.de5 Bc5 17.Nd4 Qe7 18.cd5 Bd5 19.Bc4 Rad8 20.Bd5 Rd5 (20...ed5? 21.Nc6 Qe6 22.Nd8 Rd8 23.Bd4+–) 21.Qb3?? (21.Qh5=) 21...Rfd8?? (better 21...Nd2 22.Qc2 Nf1–+) 22.Rfd1 (better 22.Nc6!? Qe8 23.Nd8+–) 22...Qh4= (22...Re5?? 23.Nc6 Rd1 24.Rd1+–) 23.Nf3?? (better 23.Qc2=) 23...Qf2–+ 24.Kh1 Ng3 (better 24...Rd1!? 25.Rd1 Rd1 26.Qd1 Qb2 27.Qd7–+) 25.Kh2 Rd1 26.Rd1 Rd1 27.Qd1 Be3?? (27...Nf1!? 28.Kh1 Qg2 29.Kg2 Ne3 30.Kg3 Nd1 31.Ba1–+) 28.Bd4?? (better 28.Qd8 Kf7 29.Bd4=) 28...Nf1–+ 29.Kh1 Ng3?? (29...h6 30.Qd3–+) 30.Kh2 Nf1?? (30...h6 31.Qd3–+) 31.Kh1 Bd4 32.Qd4 Ng3 (better 32...Qd4 33.Nd4 Kf7–+) 33.Kh2–/+ Nf1 (better 33...Qd4 34.Nd4 Nf1 35.Kg1 Ne3 36.Ne6 Nc4–/+) 34.Kh1–+ Ne3?? (34...Qd4 35.Nd4 Kf7 36.Ne2–+) 35.Qd2?? (better 35.Qd8 Kf7 36.Qd7 Kf8 37.Qd8 Kf7 38.Qd7 Kf8 39.Qd8 Kf7=) 35...Qf1 (35...Qd2 36.Nd2 h6 37.Kh2–+) 36.Kh2 Nd5 37.Qg5 (better 37.Qc2 Kf8 38.Qd2–+) 37...Qc4?? (37...h6 38.Qg6 Nf4 39.Qg3–+) 38.Qh5?? (38.Qd8 Kf7 39.Ng5 Kg6 40.Ne6=) 38...Qf4 (38...g6 39.Qh6 Qe4–+ (39...Qa4?! 40.Ng5 Qf4 41.Kh1 Qc1 42.Kh2=)) 39.Kh1? (better 39.g3!? g6 40.gf4 gh5 41.Nd4–/+) 39...g6–+ 40.Qg5 Kg7 (40...Qa4 41.Qd8 Kg7 42.Qe8–+) 41.Qd8 (better 41.Qf4 Nf4 42.Ne1–+) 41...Qc1?? (better 41...Qa4!? 42.Qd7 Kh6 43.Qd8–+) 42.Ng1 (42.Kh2–/+) 42...Nf4?? (42...Qa3 43.Qd7 Qe7 44.Qc6–+) 43.Qd7?? (better 43.Qe7 Kh6 44.Qf8 Kh5 45.Qe7=) 43...Kh6–+ 44.Qd4 (better 44.Qe7 Qe1 45.Qc7–+) 44...Ne2?? (better 44...g5 45.Qf2 Qa1–+) 45.Qf2?? (better 45.Qh4 Kg7 46.Qe7 Kg8 47.Qe8 Kg7 48.Qe7 Kg8 49.Qe8 Kg7 50.Qe7=) 45...Qg1–+ 46.Qg1 Ng1 47.Kg1 Kg5 48.Kf2 Kf4 49.g4 (49.Ke2 Ke5 50.Ke3–+) 49...Ke5 50.g5 (50.gf5 ef5 51.Ke3 Kd5–+) 50...Kd5 51.Kf3 e5 52.Ke3 e4 (52...Kc4 53.h4 Kb4 54.Kd3 Ka4 55.Kc4–+) 53.h4 Ke5 (better 53...Kc4!? 54.Kf4 Kb4 55.Ke5–+) 54.Ke2 f4 55.Kf2 e3 56.Kf3 Kd4 (56...Kf5 57.Ke2–+) 57.Ke2 f3! 58.Kf1 (58.Kf3 Theme: Deflection from d3 58...Kd3) 58...Kd3 59.h5 e2 60.Kf2 Kd2 61.hg6 e1Q 62.Kf3 hg6 63.Kg4 (63.Kg2 Ke3 64.Kh3 Kf3 65.Kh2 Qf2 66.Kh3 Qg3) 63...Qe4 (63...Ke3 64.Kh3 Kf3 65.Kh2 Qf2 66.Kh3 Qg3) 64.Kg3 Qf5 (64...Ke3 65.Kh2 Kf2 66.Kh3 Qf3 67.Kh4 Qh5) 65.Kh4 (65.Kh2 Ke3 66.Kg2 Qg5 67.Kh3 Kf3 68.Kh2 Qg2) 65...Kd3 (65...Ke3 66.Kg3 Qg5 67.Kh3 Kf3 68.Kh2 Qg2) 66.Kg3 Kc4 (66...Ke3 67.Kh4 c5 68.Kg3 Qg5 69.Kh3 Kf3 70.Kh2 Qg2) 67.Kg2 Kb4 68.Kg3 Ka4 69.Kg2 Kb5 70.Kh2 Qg5 71.Kh1 (71.Kh3 a4 72.Kh2 a3 73.Kh3 a2 74.Kh2 a1Q 75.Kh3 Qh8) 71...Qf5 (71...a4 72.Kh2 a3 73.Kh3 a2 74.Kh2 a1Q 75.Kh3 Qh8) 72.Kh2 (72.Kg2 a4 73.Kh2 Qf3 74.Kg1 a3 75.Kh2 a2 76.Kg1 a1Q 77.Kh2 Qah1) 72...Qg5 (72...Qf4 73.Kg2 a4 74.Kg1 a3 75.Kh1 a2 76.Kg2 a1Q 77.Kh3 Qaf1) 73.Kh3?? (73.Kh1 a4 74.Kh2 a3 75.Kh3 a2 76.Kh2 a1Q 77.Kh3 Qh8) 73...Qg4 (73...a4 74.Kh2 a3 75.Kh3 a2 76.Kh2 a1Q 77.Kh3 Qh8) 74.Kh2 g5 (74...g5 75.Kh1 Qe2 76.Kg1 g4 77.Kh1 g3 78.Kg1 Qf2 79.Kh1 Qf1; 74...a4 75.Kh1 a3 76.Kh2 a2 77.Kh1 a1Q 78.Kh2 Qh8) 0–1. BeepBeepImAJeep (2645) – LordBendtner99 (2355), lichess.org, 2016.

5.e3 f5 6.Nf3 Nf6 7.Be2 Bd6 8.0–0 0–0 9.Ne5 Be5 10.Be5 d6 11.Bb2 e5 12.c4 Nbd7 13.Nc3 Nc5 (13...Qe8 14.d4=) 14.d4+= Nce4 (14...Ne6!?+=) 15.Ne4+– Ne4 16.de5 de5 (16...Qg5 17.Bf3 de5 18.Be5+–) 17.Be5 (17.Qd8 Rad8 18.Be5 Rd2+–) 17...Qe7 18.Bd4 Rad8 19.Bf3 (19.Qc2 Qg5 20.Bf3 Rfe8+–) 19...Qg5 (19...Nc3! 20.Qe1 Bf3 21.gf3 Qg5 22.Kh1 Qh5=) 20.Qc2+– Rfe8 21.Rad1 Re6 22.Bb2 Rh6 23.Rd8 Qd8 24.g3 (24.Rd1 Rd6+–) 24...Rg6 25.Bg2 Qa8 (25...Rd6 26.Bd4+–) 26.Rd1 Nf6? (better 26...Rd6+–) 27.Bb7 Qb7 28.Qd3 (28.Rd8!? Kf7 29.Qf5 Qe4 30.Rd7 Kg8 31.Qe4 Ne4+–) 28...Qc8 (28...Qe4+–) 29.Qd8 Qd8 30.Rd8 Kf7 31.Rc8 (31.Bf6!? Rf6 32.Rd7 Kg6 33.Rc7 Re6+–) 31...Ne8 32.Be5 (32.Bd4 f4+–) 32...Re6 (better 32...Ke7+–) 33.Bc7 Nc7 34.Rc7 Kf6 35.Kf1 Re4 (35...h6 36.Ke2+–) 36.Ke2 (better 36.Rc6 Re6 37.Re6 Ke6 38.Ke2+–) 36...Ke5 (36...Re6+–) 37.f3 g5 (37...Rc4 38.Rc4 Kd5 39.Rc7+–) 38.fe4 fe4 1–0. BeepBeepImAJeep (2575) – Arunachala (2300), lichess.org, 2019.

5.e3 f5 6.Nf3 Nf6 7.Be2 g6 8.0–0+= Bg7 9.d4 0–0 10.c4 d6 11.Nc3 Nbd7 12.Rc1 Qe7 13.Qb3 Kh8 14.Rfd1 e5 15.Nd5 (15.de5!? de5 16.Nd5+=) 15...Nd5= 16.cd5 Rac8 (16...e4 17.Nd2 Nf6 18.Nb1=+) 17.Rc2 (17.de5 Ne5 18.Ne5 Be5+–) 17...ed4 (17...e4!? 18.Nd2 Qf7=+) 18.Nd4+= Nc5 19.Qa2 Be5 20.Bc4 Qg7 21.Nc6 (21.Nb3 Nb3 22.Be5 Qe5 23.Qb3 f4+=) 21...Bc6 (21...Bb2 22.Qb2 Qb2 23.Rb2 Na4 24.Rc2=+) 22.dc6 (better 22.Be5!? Qe5 23.dc6+=) 22...Bb2=+ 23.Rb2? (better 23.Qb2 Qb2 24.Rb2 Na4 25.Rc2–/+) 23...Na4!–+ 24.Rbd2 (24.Qa4 A deflection 24...Qb2) 24...Nc3 25.Qa1 Nd1 26.Qd1 Qe5 27.Rd5 Qe7 28.g3 Rce8 29.Qd2 Qe4?? (29...h6 30.Rd4–+) 30.Rd4?? (better 30.Qb2 Re5 31.Rd4+–) 30...Qe5 31.Bd5 Re7 32.h4 h6 33.Qd1 Kg7 34.Rf4 g5 35.hg5 hg5 36.Rd4 f4 37.gf4 gf4 38.Qg4 Kf6?? (38...Kh8 39.Rf4 Qf4 40.ef4 Rg7–+) 39.Rf4+– Qf4 40.Qf4 (40.ef4 Rg7 41.f3 Rg4 42.fg4 Kg6 43.Be4 Kh6 44.g5 Kh5 45.Bf3 Kh4–+) 40...Kg7 41.Qg5 Kh8 (41...Kh7 42.Qe7 Kh6 43.Qf8 Kg6 44.Be4 Kh5 45.Qf5 Kh4 46.f3 a4 47.Qg4) 42.Qe7 (42.Qh6 Rh7 43.Qf8) 42...Rg8 (42...Ra8 43.Qg5 Kh7 44.Be4 Kh8 45.Qh6 Kg8 46.Bd5) 43.Bg8 Kg8 44.Qc7 (44.Qc7 d5 45.Qe7 a4 46.c7 d4 47.c8Q) 1–0. BeepBeepImAJeep (2545) – survivor40 (1765), lichess.org, 2017.

5.e3 f5 6.Nf3 Nf6 7.Be2 g6 8.0–0+= Bg7 9.d4 0–0 10.c4 d6 11.Nc3 Nbd7 12.Ng5 Qe7 13.Bf3 White intends d5 13...Bf3 14.Qf3 (worse 14.gf3 Rae8=+) 14...Rac8 15.d5 (15.Qb7 e5+=) 15...Nc5 (15...Nd5 16.cd5 Qg5 17.de6=+) 16.de6 (16.Ne6 Ne6 17.de6 Qe6=) 16...Ne6 (16...Nfe4!? 17.Nge4 fe4=+) 17.Nd5+= Nd5 18.Qd5 (18.Ne6 Qe6 19.cd5 Qe4 20.Qe4 fe4 21.Bg7 Kg7+=) 18...Rfe8 19.Bg7 Kg7 20.Ne6 Qe6 21.Qd4 Qe5 22.Rfd1 Qd4 23.Rd4 Re5 24.g3 Rce8 25.Rad1 Kf6 26.Kf1 g5 27.R1d3 h5 28.h4 Re4 29.hg5 Kg5 30.Kg2 h4 31.Re4 Re4 32.Rc3 (32.Rd4 hg3 33.Kg3 Re7=) 32...hg3 (32...Rg4!?=+) 33.Kg3= Kf6 34.f4 Ke6 35.Kf3 (35.Kh4!?=) 35...Kd7=+ 36.Kf2 c6 37.Ke2 d5 38.cd5 (38.cd5 c5 39.Rc1 Ra4 40.Rg1=+). BeepBeepImAJeep (2625) – survivor40 (1870), lichess.org, 2017.

5.Nf3 d5 6.e3 Nf6 7.Be2 c5 8.d3 Nbd7 9.Nbd2 Bd6 10.0–0 0–0 11.c4 Re8 12.cd5 ed5 (12...Bd5? 13.e4+–) 13.Rc1 Qc7 14.d4 c4 15.Nc4 dc4 16.Bc4 Bf3 17.Bf7?? (better is 17.Qf3 Qb8 18.h3+=) 17...Kf7–+ 18.Qb3 (18.Qf3 Qb8 19.g3–+) 18…Bd5 (18...Bd5 19.Rc7 Bb3–+) 0–1. capitanjack – 3mjack (1715), kurnik, 2012.

5.e3 Nf6

6.Nc3 d5 (6...Bd6 7.Nf3 0–0 8.Bd3 Qe7 9.a5 ba5 10.Ra5 e5) 7.Nf3 Bd6 8.a5 c6 9.bc6 Nc6 10.ab6 Qb6.

6.d3 Be7 7.Nd2 0–0 8.Ngf3 d5 9.Be2 c5 10.0–0 Nbd7 11.Re1 Re8 12.Rc1 e5 (12...Bd6=) 13.c3 (better 13.Ne5 Ne5 14.Be5+–) 13...e4–/+ 14.de4 de4 15.Ng5 h6 (15...Ne5 16.Qc2 Nd3 17.Nge4 Ne1 18.Nf6 Bf6 19.Re1–/+) 16.Nh3 Ne5 17.Nf4 Nd3 18.Bd3 ed3 19.Nf3?? (better 19.c4 g5 20.Nh5–/+) 19...Bf3–+ 20.gf3 (20.Qd3 Qd3 21.Nd3–+) 20...Nd5 (better 20...d2–+) 21.Nd3= (worse 21.Qd3 Nf4 22.Qd8 Nh3 (22...Rad8?! 23.ef4 Bd6 24.f5=+) 23.Kg2 Rad8 (worse 23...Bd8 24.Kh3 Bf6 25.Rcd1+=; 23...Red8?! 24.Kh3 Rd2 25.Rb1–/+) 24.Kh3 Rd2–/+) 21...Bf6 22.Qe2?? (22.e4 Nc7 23.Rc2=) 22...Bh4?? (better 22...c4 23.Nc5 bc5–+) 23.Red1 (23.c4 Nb4 24.Rcd1 Qe7+=) 23...Qg5 24.Kh1 Rad8 (24...c4 25.Ne1 Nf4 26.ef4 (26.Qc4? Bf2 27.Qf1 Be3–+) 26...Re2 27.fg5 Rb2 28.Rc2 Rc2 29.Nc2 Bf2 30.gh6=) 25.Rg1 (25.c4 Nf6+=) 25...Qe7 (25...Qf5 26.c4 Ne3 27.Rg7 Kf8=) 26.e4?? (26.c4!? Nf6 27.Bc3+–) 26...Nf6?? (better 26...c4 27.Ne1 Nf4–+) 27.Nf4?? (better 27.c4+=) 27...Bg5–+ 28.Nh3 (28.Nd3 c4 29.Ne1 Rd2 30.Qc4 Rb2–+) 28...Bc1 (better 28...Rd2 29.Qf1 Rb2–+) 29.Bc1 Qe5 (29...Kh7!? 30.Qc2 Nh5 31.Nf4 Nf4 32.Bf4–+) 30.Bh6–/+ g6 (30...Nh5 31.Bg5 f6 32.Qc4 Qe6 33.Qe6 Re6 34.Be3–/+) 31.Bg5 (better 31.Qe3=+) 31...Nh5?? (31...Qc3!? 32.Nf4 Rd6–+) 32.Qe3?? (better 32.Bd8 Rd8 33.Qe3+–) 32...Rd7=+ 33.Nf4 Nf4 34.Qf4 Qe6 (34...Rd3!? 35.Kg2 Qf4 (35...Rc3?? 36.Qe5 Re5 37.Bf6+–; 35...Qc3?? 36.Bf6 Rf3 37.Qf3 Qf3 38.Kf3+–) 36.Bf4 f5 37.ef5 gf5=+) 35.Qh4 (better 35.Bf6 Qh3 36.e5+=) 35...Qe5?? (better 35...Rd6=) 36.Qh6 (better 36.Bf6 Qf6 37.Qf6+–) 36...Qg7 (36...Qc3 37.Kg2–+) 37.Qh4 (better 37.Qg7!? Kg7 38.Kg2=+) 37...Qh7?? (better 37...Qc3 38.Kg2 Re6–+) 38.Qg4= (38.Qg4 Rd3 39.Bf6=). alessandrocarvalhaes (1850) – Xaxam (1850), lichess.org, 2020.

6.d4 Bb4 7.c3 Bd6 (7...Be7 8.Nf3 Ne4 9.Bd3 f5 10.0–0 0–0=) 8.Nf3 0–0 9.Bd3 Ne4 10.0–0 f5 =.

6.d4 Nd5 7.Nf3 (7.e4 Nf6 8.e5 Ne4 9.Nf3 Bb4 10.c3 Be7=) 7...Bb4 (7...f5 8.Be2 Bd6 9.c4 Nb4 10.0–0 0–0+=; 7...Bd6 8.Be2 0–0 9.0–0 Nf6 10.c4 Bb4+=; 7...Be7 8.Be2 0–0 9.0–0 f5 10.c4 Nf6+=; 7...Ra7 8.Be2 Bb4 9.c3 Bd6 10.0–0 0–0+=) 8.c3 Be7 9.Bd3 0–0 10.0–0 f5 =.

6.d4 Be4 A) 7.Nf3 d5 (7...Bb4 8.Nbd2 Bf5 9.Be2 0–0 10.0–0 d5=; 7...Be7 8.Nbd2 Bf5 9.Be2 0–0 10.0–0 c6+=) 8.Nbd2 Bd6 9.Be2 0–0 10.0–0 Bf3=; B) 7.f3 Bb7 (7...Bg6 8.Nh3 Nd5 9.Qe2 Bb4 10.c3 Bb1=) 8.Bd3 Nd5 9.e4 Nf4 10.Bf1 d5=; C) 7.Ne2 Bb4 (7...Be7 8.f3 Bb7 9.e4 0–0 10.Nd2 d5=; 7...Bd6 8.f3 Bg6 9.e4 Nh5 10.g3 Bb4=; 7...d5 8.Ng3 Bg6 9.Be2 Bd6 10.0–0 c6=) 8.c3 Be7 9.Nd2 Bb7 10.c4 0–0=; D) 7.Nd2 d5 (7...Bf5 8.Ngf3 Bb4 9.Be2 0–0 10.0–0 d5=) 8.Ngf3 Bd6 9.Be2 0–0 10.0–0 c6=.

6.d4 Ne4 7.Nf3 Bb4 (7...Qf6 8.Bd3 Be7 9.Ba3 d6 10.0–0 0–0=; 7...f5 8.Bd3 Bb4 9.c3 Bd6 10.0–0 Qf6=; 7...Be7 8.Bd3 0–0 9.0–0 f5 10.c4 Bb4=) 8.c3 Bd6 9.Bd3 f5 10.0–0 0–0 =.

6.d4 Be7 7.Nd2 (7.Nf3 Ne4 (7...Nd5 8.Be2 0–0 9.0–0 Nb4 10.c3 Nd5+=; 7...0–0 8.Bd3 Be4 9.0–0 d5 10.Ne5 Bd3=; 7...Bb4 8.c3 Be7 9.Bd3 0–0 10.0–0 Ne4=; 7...Be4 8.Nbd2 Bf5 9.Be2 0–0 10.0–0 Bb4+=) 8.Bd3 0–0 9.0–0 f5 10.c4 Bb4=) 7...0–0 (7...c6 8.Ngf3= 0–0 9.Bd3 Re8 10.0–0 Nd5=; 7...Ne4 8.Ne4 Be4 9.Nf3 d5 10.Bd3 Bb4=; 7...Bb4 8.c3 Be7 9.Ngf3 Ne4 10.Bd3 f5=; 7...Bd5 8.c4 Bb7 9.Ngf3 0–0 10.Bd3 c6+=) 8.c4 (8.Ngf3 c6= 9.Bd3 cb5 10.ab5 Qc7=) 8...c6 (8...Bb4 9.Ngf3= Ne4 10.Ba3 Nd2=; 8...Ne4 9.Ngf3 Bb4 10.Ba3 Nd2=) 9.Rc1 (9.Ngf3 cb5 10.ab5 (10.cb5 Ne4=) 10...d5=) 9...Bb4+= 10.Ngf3 (10.f3 d6+=) 10...Ne4 11.Bd3 Nd2 12.Nd2 cb5 13.cb5 Bg2 14.Rg1 Bb7 15.Qh5 f5 16.d5 Rf7 17.Qh6 (17.Qh6 e5 18.Bf5+– (18.Be5?! Qe7 19.Bd4 Kf8 20.Qh7 Ke8+–)) 1–0. Nebe,Lutz – Wichert,P, corr, 1988.

6.Nf3 Ra7 A) 7.Nc3 Bc5 (7...Bb4 8.Be2 0–0 9.0–0 Qe7 10.Ne5 d6=; 7...d5 8.Be2 Bd6 9.Ba3 0–0 10.Bd6 cd6=; 7...Bd6 8.Be2 0–0 9.d3 Bb4 10.0–0 Qe7+=; 7...Be7 8.Be2 0–0 9.0–0 Bd6 10.d3 Qe7=) 8.Bc4 d5 9.Be2 0–0 10.0–0 Bd6=; B) 7.Bc4 Bc5 (7...Bb4 8.0–0 0–0 9.Qe2 Re8 10.Ne5 Bd5=; 7...d5 8.Be2 Bd6 9.0–0 0–0 10.Ba3 e5=; 7...Be7 8.0–0 0–0 9.Na3 d5 10.Be2 Nbd7=; 7...Bd6 8.Be2 Qe7 9.0–0 Ng4 10.h3 Nf6=) 8.0–0 0–0 9.Ne5 c6 10.d4 Bb4=; C) 7.Bd3 Bc5 (7...Bb4 8.0–0 0–0 9.Qe2 Ne4 10.Be4 Be4=) 8.0–0 0–0 9.Be2 Bb4 10.Ne5 d6=; D) 7.Be2 Bd6 (7...Be7 8.0–0 0–0 9.d3 d5 10.Nbd2 c6=; 7...Bc5 8.d4 Bb4 9.c3 Bd6 10.0–0 0–0+=; 7...Bb4 8.0–0 0–0 9.Ne5 d6 10.Nf3 Bf3=) 8.0–0 Ng4 9.h3 Nf6 10.d3 0–0=.

6.Nf3 Bb4 A) 7.Bc4 0–0 (7...Ne4 8.0–0 0–0 9.Be2 Qe7 10.d3 Nf6+=; 7...Qe7 8.0–0 0–0 9.c3 Bd6 10.d3 Ng4=; 7...d5 8.Be2 0–0 9.0–0 Bd6 10.Ba3 e5=; 7...Nd5 8.0–0 0–0 9.Bd4 Be7 10.Re1 Nf6=) 8.0–0 Qe7 9.Bd4 d5 10.Be2 Nbd7=; B) 7.Bd3 0–0 (7...Qe7 8.0–0 0–0 9.Nc3 Re8 10.Rb1 e5=; 7...Ra7 8.0–0 0–0 9.Nc3 Qe7 10.Qe2 e5=; 7...Ne4 8.Be4 Be4 9.0–0 0–0 10.d3 Bb7=; 7...Bc5 8.0–0 0–0 9.Na3 Qe7 10.Be2 Re8=) 8.0–0 Re8 9.Bd4 Bd6 10.Ne5 Be7=; C) 7.Nc3 d5 (7...0–0 8.Be2 Qe7 9.0–0 Qd6 10.d3 Re8=; 7...Qe7 8.Be2 0–0 9.0–0 Qd6 10.d3 Re8=) 8.Bd3 0–0 9.0–0 Nbd7 10.Re1 Ne4=; D) 7.Be2 0–0 (7...Qe7 8.0–0 0–0 9.Ne5 d6 10.Nd3 Nbd7=; 7...Nd5 8.0–0 0–0 9.c3 Bd6 10.c4 Nb4=; 7...Ne4 8.0–0 0–0 9.d3 Ng5 10.Nbd2 Nf3+=; 7...Ra7 8.0–0 0–0 9.d3 d5 10.Nbd2 Bd6=) 8.0–0 Qe7 9.Ne5 d6 10.Nd3 Nbd7=.

6.Nf3 c5 7.c4 Qc7 8.Be2 Be7 9.0–0 Ng4 10.d4?? (better 10.h3 Bf3 11.hg4 Be2 12.Qe2=) 10...Bf3–+ Threatening mate... how? 11.g3 Be2 12.Qe2 f5 (12...Nf6 13.e4–+) 13.Nd2 (better 13.e4 Nh6 14.Qh5 Nf7 15.dc5–+) 13...cd4 14.Bd4 0–0 15.Qf3 Ra7 16.Rac1 Bf6 (16...Ne5 17.Qe2–+) 17.Nb3 (17.c5 Bd4 18.ed4 d6–+) 17...Bd4 (17...d6!? 18.h3 Ne5 19.Be5 Be5 20.Rfd1–+) 18.ed4 Qd6 (18...Nf6 19.c5–+) 19.c5 Qd5?? (better 19...Qc7–+) 20.Qd5= ed5 21.cb6 Rb7 22.Na5 Rb6 23.Nb3 d6 24.Rc7 Rf7 (24...Nf6 25.f3=+) 25.Rfc1 (25.Rc8 Rf8 26.Rc7 Nf6=+) 25...Rc7 26.Rc7 Nf6 27.Na5 h6 28.Nb7 (28.f4 g6=) 28...Kh7 (better 28...Ne8!? 29.Rc8 Rb7 30.Re8 Kf7–/+) 29.Nd8= Ne4 (better 29...Nbd7=) 30.Ne6+– h5 31.Rg7 (31.Ng7?! Na6 32.ba6 Ra6 33.Nf5 Kg6 34.Ne7 Kh6+–) 31...Kh6 32.Rc7 Ng5 (better 32...Na6 33.Rf7 Nb4+–) 33.Nf8 Nf3 (33...Na6 34.ba6 Ra6+–) 34.Kg2 Nd4 (34...Ne1 35.Kf1 Kg5 36.Ke1 f4+–) 35.h4 (35.h4 Nd7 36.Rd7 Rb7 37.Rb7 Nb5 38.Rh7) 1–0. BeepBeepImAJeep (2660) – Piglets (2335), lichess.org, 2016.

6.Nf3 c5 7.Be2 Qc7 8.0–0 Ng4 9.c4?? (better 9.Re1=) 9...Bf3–+ Do you see the mate threat? 10.g3 Be2 11.Qe2 h5 12.Qf3 Ra7 13.Nc3 d6 14.d4 (14.h3 Ne5 15.Qe2 Be7–+) 14...Nd7 (14...cd4!? 15.ed4 Qc4 16.Rfc1–+) 15.Ne4 f5 (15...Be7!? 16.dc5 Nge5 17.Be5 Ne5 18.Qe2 dc5 19.f4–+) 16.Ng5 Be7?? (better 16...Rh6 17.d5 Nde5 18.Be5 Ne5–+ (18...de5?! 19.Ne6 Qd6 20.h3=+)) 17.Ne6+= Qb7 18.Ng7 Kf7 19.d5?? (19.Qb7 Rb7 20.Nf5 cd4 21.ed4 Rc8+=) 19...Bf6?? (better 19...Nde5 20.Qe2 Kg7–/+) 20.Bf6 Ndf6 21.Nf5 Qd7 22.Qf4 (22.e4 Rf8 23.Qg2 Ke8+–) 22...Ne5= 23.Rad1 (23.f3 Ke8=) 23...h4 (better 23...Rf8!?=+) 24.Nh4+= Rh4 25.gh4 Qh3 (25...Ra8 26.Kh1+–) 26.Kh1 Nf3? (better 26...Ra8!? 27.Qg3 Qf5+=) 27.Qg3 Qf5 28.Kg2 (better 28.Qd6 Ne5 29.f3 (29.Qb6?! Qf3 30.Kg1 Qg4 31.Kh1 Qf3 32.Kg1 Qg4 33.Kh1 Qf3=) 29...Nc4 30.Qb8+–) 28...Ne5= 29.f4 (29.Qh3 Nfg4 30.Rde1 Qe4 31.f3 Ne3 32.Kh1=) 29...Neg4 (29...Nc4 30.Kg1–/+) 30.h3 (30.Rc1 Ne4 31.Qe1 Ke8–/+) 30...Nh6 (30...Qe4 31.Kg1 Qe3 32.Kg2 Qg3 33.Kg3=) 31.Qf3 (31.Qg5 Qe4 32.Kh2 Ra8 33.Qh6 Qc2 34.Kh1 Qe4 35.Kh2 Qc2 36.Kh1 Qe4 37.Kh2=) 31...Ne4 (better 31...Qc2!? 32.Kg1 Qc4=+) 32.Kh2 Kf6? (better 32...Ke8!?+–) 33.Rg1+– Rg7 (33...Re7+–) 34.Rg5! Rg5 (34...Qg5 35.fg5 Theme: Double Attack) 35.fg5 (better 35.hg5!? Ng5 36.fg5 Kg6+–) 35...Kg6 36.Rf1 (36.Kg2 Qf3 37.Kf3 Nc3+–) 36...Qf3? (better 36...Nd2 37.Qf5 Nf5+–) 37.Rf3 Nf5 38.Rf4 Nd2 39.Kg2 (better 39.e4 Nh4 40.Kg3 Kg5 41.Rh4 Nc4 42.Rh7+–) 39...Ne3 40.Kf2 Nec4? (40...Nf5 41.Rg4+–) 41.Rf6 (better 41.Ke2 Kh5 42.Rg4+–) 41...Kg7 42.h5?? (better 42.Re6+–) 42...Ne4–+ 43.Kf3 (43.Ke2 Nf6 44.h6 Kf7 45.gf6 Kf6–+) 43...Nf6 (better 43...Ng5 44.Kf4 Kf6–+) 44.h6 Kg6 45.gf6 Kf6 46.Kg4 (46.Ke4 Nb2–+) 46...Kg6 (46...Ne3 47.Kh5 c4 48.h7–+) 47.h7 Kh6 (47...Kh7 48.Kf5–+) 48.Kf5 (48.h8Q Kg6 49.Qg8 Kf6 50.Qe6 Kg7 51.Kg5 Na3 52.Qe7 Kg8 53.Kf6 Nb5 54.Qg7) 48...Kh7–+ 49.Ke6 Kg8 (49...Nb2 50.Kf5 Na4 51.Ke4 Nc3 52.Kd3 Nd5 53.Kc2–+) 50.Kd7 (50.h4 Kh7–+) 50...Kh8 (better 50...Ne5!? 51.Kd6 Nf7 52.Kc7–+) 51.Kc6 (51.Ke7–+) 51...Nb2 (better 51...Ne5 52.Kd6 Ng6–+) 52.h4?? (better 52.Kb6 Nc4 53.Kb7–+) 52...Nc4 (better 52...c4 53.Kb6 c3–+) 53.h5 Kh7 54.h6 Kh6 55.Kd7 Kh5 56.Ke6 Kh4 (56...Nb2 57.Kd6 c4 58.Ke5–+) 57.Kf5 (57.Kd7 Kg5 58.Kc7 Kf5–+) 57...Kh3 (57...Nb2 58.Ke4–+) 58.Kf4 (58.Ke6 Kg4 59.Kd7 Ne5 60.Kd6 Kf5–+) 58...Kh2 59.Kf3 (59.Kf3 Na3 60.Ke4–+). BeepBeepImAJeep (2700) – Indignity (2440), lichess.org, 2016.

6.Nf3 Bc5= A) 7.Be2 0–0 (7...Bb4 8.0–0 0–0 9.Nc3 Qe7 10.Ne5 d5=; 7...Ra7 8.0–0 0–0 9.c4 Bb4 10.Qc2 d6=; 7...Qe7 8.d4 Bb4 9.c3 Bd6 10.0–0 0–0=) 8.0–0 Be7 9.Ne5 d6 10.Bf3 Qc8=; B) 7.Bc4 Bb4 (7...Qe7 8.0–0 0–0 9.d4 Bb4 10.Bd3 Ne4=; 7...d5 8.Be2 0–0 9.0–0 Bd6 10.Ba3 e5=; 7...Ne4 8.0–0 0–0 9.d3 Ng5 10.Nbd2 Nf3=; 7...0–0 8.0–0 d5 9.Be2 c6 10.Nc3 Ne4=) 8.0–0 0–0 9.Ne5 d6 10.c3 Bc5=; C) 7.Bd3 0–0 (7...Qe7 8.0–0 0–0 9.Be2 Re8 10.d4 Bd6=) 8.0–0 Qe7 9.Qe2 Ne4 10.Be4 Be4=; D) 7.d4 Bd6 (7...Bb4 8.c3 Bd6 9.Bd3 0–0 10.0–0 Ne4=; 7...Be7 8.Bd3 Nd5 9.Nbd2 0–0 10.0–0 f5=) 8.Bd3 Ne4 9.Be4 Be4 10.Nbd2 f5=.

6.Nf3 d5 A) 7.Be2 c5 (7...Bb4 8.0–0 0–0 9.d4 Ne4 10.Ba3 c5=; 7...Bc5 8.0–0 0–0 9.Ba3 Bd6 10.d4 Ba3=; 7...Be7 8.0–0 0–0 9.d4 Bd6 10.Qd3 c6=; 7...Bd6 8.0–0 0–0 9.d4 c6 10.Ba3 c5=) 8.0–0 Bd6 9.Be5 0–0 10.d4 Be5=; B) 7.d4 c5 (7...Bd6 8.Bd3 0–0 9.0–0 c6 10.Ba3 c5=; 7...Bb4 8.Nbd2 0–0 9.Bd3 c6 10.0–0 cb5=; 7...c6 8.Ba3 Ba3 9.Ra3 0–0 10.Bd3 c5=) 8.Be2 Nbd7 9.dc5 Bc5 10.0–0 0–0=; C) 7.Bd3 Bd6 (7...Nbd7 8.0–0 Bd6 9.Be2 0–0 10.Ba3 Rc8=; 7...Be7 8.0–0 0–0 9.Ne5 Nbd7 10.Qf3 Ne5=) 8.0–0 0–0 9.Ba3 c5 10.bc6 Nc6=; D) 7.Ba3 Bb4 (7...Ba3 8.Ra3 c5 9.bc6 Nc6 10.Bb5 0–0=) 8.Be2 Ne4 9.0–0 0–0 10.c3 Qf6=.

6.Nf3 d6 7.c4 Be7 8.Be2 0–0 9.0–0 Nbd7 10.d4 Re8 11.Nbd2 Bf8 12.Rc1 e5 13.de5 (13.Qc2 e4 14.Ng5 Rc8+=) 13...Ne5 14.Ne5 White fights for the Initiative 14...de5 (worse 14...Re5 15.Be5 de5 16.Qc2+–) 15.Nf3 e4 (15...Bd6 16.c5 bc5 17.Qc2=) 16.Nd4 Bc5 17.Nb3 Bb4 18.c5 bc5 (better 18...Qe7!?+=) 19.Nc5+– Bd5 20.Na6 Rc8 (20...Bd6 21.Bf6 gf6 22.f4+–) 21.Nb4 (21.b6 Bb7 22.Nb4 ab4 23.Rc7 Rc7 24.Qd8 Rd8 25.bc7 Rc8+–) 21...ab4 22.Qd4 (22.Bf6 gf6 23.Bc4 Be6 24.Be6 Re6 25.Qg4 Kh8+–) 22...Qd6 23.Rfd1 Rcd8 (23...Ra8 24.Ra1+–) 24.h3 (better 24.a5 Ra8 25.a6+–) 24...Qe6? (24...Qf8 25.Qc5 Bb3 26.Rd8 Rd8 27.Qc7 Nd5+–) 25.Qb4 g6? (25...c6+–) 26.Qc3 Kg7 27.Bg4 Qd6 (27...Qe7+–) 28.Rd5! Qd5 Deflection from f6 (28...Qe7 29.Rd8 Rd8 30.Qc7 Kf8+–) 29.Qf6 Kh6 30.Qg7 Kg5 31.Bf6 1–0. BeepBeepImAJeep (2640) – Scrooge (2190), lichess.org, 2016.

6.f4 d5 7.Nf3 c5 8.c4 Be7 9.Be2 0–0 10.0–0 dc4 11.Bc4 Bd5 12.Be2 Qc7 13.Nc3 Rd8 14.Nd5 Nd5 15.Be5 Bd6 16.Bb2 Nb4 17.Qb3 Nd7 18.Qc3 Bf8 19.d4 Nf6 20.dc5 Bc5 21.Ne5 Nbd5 22.Qb3 Ne3 23.Kh1 Nf1 24.Rf1 Qd6 25.Nc6 Rd7 26.Bf3 Nd5 27.Be4 Re8 28.g4 Nf4 29.Be5 Qd2 30.Bf4 f5 31.Bd2 Rd2 32.gf5 1–0. jura1946 – abanit, kurnik, 2012.

6.Nf3 Be7

7.Nc3 d5 (7...0–0 8.Be2 c5 9.bc6 dc6 10.0–0 Qd6=; 7...d6 8.Be2 0–0 9.0–0 e5 10.d3 Nbd7=; 7...Ra7 8.Be2 0–0 9.Rb1 Bb4 10.0–0 Qe7=) 8.Be2 0–0 9.0–0 Bd6 10.Ba3 Ne4=.

7.c4 0–0 8.Be2 d5 9.0–0 Nbd7 10.d4 c6 11.Nbd2 cb5 12.cb5 Rc8 13.Rc1 Ne4 14.Ne4 de4 15.Nd2 Bb4 16.Nc4 Nf6 (16...Bd5 17.Qb3=) 17.Ne5 Nd5 (17...Bd5 18.Rc2=) 18.Qb3 (18.Rc8 Qc8 19.Qb1 f5+=) 18...Qd6 19.Qa2 f6 Black gets the initiative 20.Nc4 Qb8 (20...Qd8 21.Qb1 f5 22.Ne5=) 21.Na3 (better 21.Nb6!? Rc7 22.Nc4+–) 21...Bd6= 22.Nc4 (22.h3!?=) 22...Bh2=+ 23.Kh1 f5 (23...Bc7 24.Ba3 Rfd8 25.f3 ef3 26.Bf3=+) 24.Ne5 (24.Nb6!? Rc1 25.Rc1= (worse 25.Bc1 Nb6 26.Qe6 Kh8=)) 24...Be5=+ 25.de5 f4 26.Bg4 Rce8 27.Bd4 Qd8 28.Bh3 Qh4 29.Rc6?? (better 29.Qe2–/+) 29...Bc6–+ 30.bc6 f3 (better 30...g5 31.ef4 g4–+ (31...Qf4?! 32.Be6 Re6 33.Qd5=+; 31...gf4?! 32.Kh2–+)) 31.Rg1?? (31.Kg1–+) 31...Rf5 32.Kh2 (32.Qb1 fg2 33.Rg2 Qh3 34.Rh2 Qf3 35.Kg1 Rg5 36.Kf1–+) 32...Rh5 33.Rh1 (33.Bc3 fg2 34.Rc1 Qh3 35.Kg1 Qh2) 33...Rf8 (33...Qg4! 34.Kg1 Rh3 35.Rh2 Rh2 36.g3 Qh5 37.Qd5 Rh1) 34.Kg1–+ fg2?? (34...Qg5 35.g3 Rf7 36.Qb1–+) 35.Bg2 (better 35.Be6 Kh8 36.Rh4+–) 35...Qg5 (35...Qg4!? 36.Rh5 Qd1 37.Bf1 Qh5 38.Qe2–+) 36.Rh5 Qh5 37.Qc4 (better 37.Be4 Qg4 38.Bg2 Qd1 39.Kh2–+) 37...Qd1 38.Qf1 Qc2 39.Be4 (39.Bh1 Rf5–+ (worse 39...Qc6 40.Be4 h6 41.Qd1–+)) 39...Qc6 (better 39...Qe4 40.Qd1 Rf3–+) 40.Qg2 g6 41.Kh2 Qd7 (41...Qa4 42.Bd5 ed5 43.Qd5 Kg7 44.e6 Kh6 45.f4+–) 42.Bd5 Qd5 43.Qh3 (43.Qd5 ed5 44.Kg3 Rb8–+) 43...Rf5 (better 43...Rf2 44.Kg1 Rd2–+) 44.Qg2 Rh5 45.Kg1 Qc4 46.f4 Qc1 (46...Qa4!? 47.Qa8 Kg7 48.Qb7 Kh6 49.Qf3–+) 47.Kf2 (47.Kf2 Rh1 48.Bc3–+) 1–0. BeepBeepImAJeep (2515) – streetfirer (2380), lichess.org, 2018.

7.Bc4 c6 (7...d5 8.Be2 0–0 9.0–0 c5 10.bc6 Nc6=; 7...c5 8.bc6 dc6 9.0–0 0–0 10.d3 Nbd7=; 7...Ne4 8.0–0 0–0 9.Nc3 Nc3 10.Bc3 d5=; 7...0–0 8.0–0 d5 9.Be2 c5 10.bc6 Nc6=) 8.0–0 0–0 9.bc6 Nc6 10.Nc3 Rc8=.

7.Bd3 Bc5 (7...0–0 8.Nc3 d6 9.0–0 Nbd7 10.Rb1 Nc5=; 7...Ne4 8.Nc3 f5 9.Be4 fe4 10.Nd4 Bf6=; 7...Bb4 8.0–0 0–0 9.Nc3 Re8 10.Na2 Bc5=) 8.0–0 0–0 9.Qe2 Qe7 10.Nc3 e5=.

7.d4 0–0 (7...Ne4 8.Bd3=) 8.Nbd2 d6 (8...c6 9.Bd3=) 9.c4 (9.Bd3 Nd5=) 9...Nbd7 10.Rc1 Ne4 11.Bd3 (11.Ne4 Be4 12.Bd3 Bd3 13.Qd3 Rc8+=) 11...f5 (11...Nd2 12.Qd2 f5 13.Qe2=) 12.0–0 Qe8 13.Ne1 (13.Be2 Qg6=) 13...Qg6 14.f3 Ng5 (14...Nd2 15.Qd2 c5 16.Rd1=) 15.Qe2 (15.Qb3 Nf6=) 15...Nf6 (15...c6 16.Bc2=) 16.Kh1 (16.Nc2 Rac8=) 16...Qh6 (16...c6 17.e4 fe4 18.fe4 cb5 19.ab5 Be4 20.Ne4 Nfe4 21.Nf3=+) 17.Qf2 (17.Nc2 c6=) 17...Nfe4 18.Ne4 (18.fe4!? fe4 19.Qg3 ed3 20.Nd3 Rf1 21.Rf1=+) 18...fe4=+ 19.Be2 ef3 20.gf3 (20.Nf3 Ne4 21.Qe1 Qe3–/+) 20...Rf7 (better 20...Nh3!? 21.Qg3 Qe3–/+) 21.Qg2=+ Raf8 22.Bd1 (22.e4 Nh3 23.Nd3 Rf6–/+) 22...Nh3 (22...Ne4!–/+) 23.Rc2 (23.Qg3 Rf5 24.Ng2 Rg5=+) 23...Kh8 (better 23...Rf5–/+) 24.e4? (24.d5 Bc8–/+ (worse 24...ed5 25.f4=)) 24...Ng5 (better 24...Be4 25.Bc1 Nf4–+) 25.Bc1 (25.Rg1 Qh4 26.Qg4 Qg4 27.Rg4 Ne4 28.fe4 Rf1 29.Rg1 Be4 30.Rcg2 Bg5–+ (30...Bg2?! 31.Ng2 e5 32.Ne3=+)) 25...Qh5 26.Rcf2? (26.d5 Ne4! 27.Nd3 Ng5–/+) 26...Nh3 (better 26...Ne4!? 27.fe4 Rf2 (27...Qd1?! 28.Rf7 Rf7 29.Rf7 Qe1 30.Rf1 Qe4 31.Qe4 Be4 32.Kg1–/+) 28.Rf2 Qd1 29.Rf8 Bf8–+) 27.Re2–/+ Nf4 (27...e5 28.de5 de5 29.Nd3–/+) 28.Bf4 Rf4 29.Ref2 (29.Rg1 Bf6 30.Rd2 Qh6–/+) 29...Qf7 (better 29...Be4 30.fe4 Rf2 31.Rf2 Qd1 32.Rf8 Bf8–+) 30.Qg3?? (30.Nd3 Rh4–/+) 30...e5 (better 30...Bh4 31.Qg2 Bf2 32.Qf2 Be4–+) 31.Ng2–/+ Bg5?? (better 31...Rf6!? 32.d5 Rg6=+) 32.d5?? (32.Qg5 Rf6 33.d5 h6+–) 32...Rf6?? (better 32...Qf6 33.Nf4 Bf4=) 33.h4?? (better 33.Qg5 h6 34.Qg3+–) 33...Bh6 34.Qh3 (34.f4–/+) 34...Rg6 (better 34...Bc8!? 35.Qg3 Qe8–/+) 35.f4=+ Rf6 (worse 35...ef4 36.Bh5+–) 36.f5 White prepares the advance h5 36...Bc8 (36...Qe7 37.Qg3=+) 37.h5 g6 (37...Qe7 38.Ne3 Be3 39.Qe3=) 38.Nh4 (better 38.hg6!? Qg7 39.Nh4+–) 38...gf5 (better 38...gh5 39.Rg1 Bd7=) 39.Qh2 (better 39.Nf5 Bg5 40.Bg4=) 39...f4–/+ 40.Nf5 (better 40.Rg2–/+) 40...f3?? (40...Bf5 41.ef5 Rf5 42.Bg4–+) 41.Bf3?? (41.Nh6!? Qg7 42.Nf5 Bf5 43.ef5+–) 41...Rf5?? (better 41...Bf5 42.Bg2 Bf4 43.Rf4 ef4 44.ef5 Rf5–+) 42.ef5= Bf5 43.Be4?? (better 43.Qh4=) 43...Be4 44.Kg1 (44.Rf3 Bf3 45.Rf3 Qf3 46.Qg2 Qh5 47.Kg1 Be3 48.Qf2 Rf2 49.c5 Qd1) 44...Bf3 45.Rf3 Qg7 (45...Qf3 46.Rf3 Rf3 47.Qh4 Be3 48.Kg2 Rf2 49.Kg3+=) 46.Qg2 (46.Kh1 Bf4 47.Qg2+= (worse 47.Rf4 ef4 48.Rg1 Qc3–+)) 46...Be3?? (46...Bf4 47.Kh1+=) 47.Kh1 (better 47.Re3 Rf1 48.Kf1 Qg2 49.Kg2+–) 47...Rf3 (47...Bf4 48.Rg1 Qg2 49.Rg2+–) 48.Rf3 Qg2 49.Kg2 Bf4 50.Rg3?? (better 50.Rf2+–) 50...Bg3–+ 51.Kh3 (51.Kg3 Kg7 52.Kh3–+) 51...e4 (51...Kg7 52.Kg4 Kh6 53.Kf3–+) 52.Kg4?? (better 52.Kg3 Kg7 53.Kf4–+) 52...Kg7 (better 52...Be5 53.h6 Kg8 54.Kh3–+) 53.h6 (53.Kg3 Kh6 54.Kg4–+) 53...Kh6 54.Kf5 (54.Kh3 Kg5 55.Kg3 h6–+) 54...e3 55.Ke4 e2 56.Kf5 e1Q 57.Kf6 (57.c5 Bh2 58.Kf6 Qe8 59.c6 Be5 60.Kf5 Qg6) 57...Qe3 (57...Qe8 58.c5 Be5 59.Kf5 Qg6) 58.Kf7 (58.Kf5 Kg7 59.Kg4 h5 60.Kh5 Qf4 61.c5 Qf5) 58...Qe5 (58...Bh4 59.Kf8 Qe7 60.Kg8 Qe8) 59.Kg8 (59.c5 Qg7 60.Ke8 Bh4 61.cd6 Kg6 62.dc7 Qf7) 59...Qe7 (59...Qg7) 60.Kh8 (60.c5 Qe8) 60...Qf7 (60...Qe8) 61.c5 Qf8 (61...Be5) 0–1. TwelveTeen (2620) – penguingim1, lichess.org, 2018.

7.Be2 Bd6 (7...Ra7 8.0–0 0–0 9.Nc3 Re8 10.d3 Bc5=; 7...0–0 8.0–0 Re8 9.Nc3 d6 10.d3 d5=; 7...d6 8.0–0 0–0 9.Nc3 Nbd7 10.Nd4 Nc5=; 7...Bb4 8.Nc3 0–0 9.0–0 Qe7 10.Ne5 d5=) 8.0–0 0–0 9.Nc3 Re8 10.d3 e5=.

4.Bb2 Nf6

5.c4 d6 6.e3 g6 7.Nf3 Bg7 8.Be2 0–0 9.0–0 e5 10.d4 ed4 11.Nd4 Qe7 12.Nd2 Nbd7 13.Bf3 Bf3 14.N2f3 Ne5 15.Ne5 Qe5 (15...de5? 16.Nc6 Qe6 17.Be5+–) 16.Qc2 (16.Qe2 Rae8+=) 16...Qh5 (16...Ng4 17.g3=) 17.h3 Rae8 18.Rad1 Ne4 19.Ne2 Bb2 20.Qb2 g5 21.f3 Nc5 22.Qa3 (22.Nc3 f5= (22...Re3? 23.Nd5 Re6 24.Nc7+–)) 22...f5 Black prepares the advance g4 23.Rd5 Qg6 24.Nd4 g4 25.Kh2 (25.h4 h6=) 25...Re5 (25...f4 26.fg4 fe3 27.Nf5=+) 26.Re5= de5 27.Nc6 Qd6 28.f4 ef4 29.ef4 Re8 30.Qg3 (30.hg4!? fg4 31.Qg3 Qh6 32.Kg1+=) 30...Ne4=+ 31.Qe3 g3 (31...Qd2 32.Re1 g3 33.Qg3 Ng3 34.Re8 Kf7 35.Re7 Kf6 36.Kg3–+) 32.Kg1= Qd2 Threatening mate... how? 33.Rf3 Qd1 34.Rf1 Qa4 (34...Qc2 35.Rc1 Qb2 36.Rf1=) 35.Qd3+= Qa2 36.Qd5 Kg7?? (better 36...Kh8 37.Qd7 Nd6=) 37.Qd7+– (37.Qd7 Kf8 38.Ne5+– (38.Qh7?! Qc4 39.Qh6 Kg8 40.Qg6 Kf8 41.Qh6 Kg8 42.Qg6 Kf8 43.Qh6=; 38.Qf5?! Kg8 39.Qd5 Kf8+–)) 1–0. BeepBeepImAJeep – leomessi_23 (2620), lichess.org, 2018.

5.c4 e6 6.e3 c5 7.Nf3 d5 8.Nc3 (8.Bd3 Bd6=) 8...d4 (8...Nbd7 9.cd5 ed5 10.Be2=) 9.ed4 cd4 10.Na2 (10.Ne2!? e5 11.Ne5=) 10...Bc5+= 11.d3 (11.Nc1 0–0 12.Nd3 e5 13.Nfe5 Re8+=) 11...0–0 (11...Qc7 12.Be2–/+) 12.Be2 Nbd7 13.0–0 e5 14.Nd2 (14.Nc1 Bd6–/+) 14...Re8 Black plans e4 (14...Bd6 15.Bf3 Qc7 16.Bb7 Qb7 17.Qf3 Qf3 18.Nf3+=) 15.Re1 (15.Nc1 e4–/+) 15...Qe7 (15...Qc7 16.Bf3–/+) 16.Nc1 (16.Bf3 Bf3 17.Nf3 Qd6–/+) 16...e4 (16...Bb4!?–/+) 17.de4+= Ne4 18.Kf1?? (better is 18.Bf3 f5 19.Nd3+=) 18...Qh4 (better is 18...Nf2 19.Bf3 Qd6 20.Bb7 Nd1 21.Rd1 Ra7–+) 19.Nf3?? (19.Ne4 Qh2 20.Bf3 Qh1 21.Ke2–+) 19...Qf2 0–1. mic (2190) – kode (2390), net–chess.com, 2008.

5.c4 e6 6.e3 Bc5 7.Nf3 0–0 8.Be2 d5 9.0–0 c6 10.cd5 cb5 (better 10...Nd5!? 11.Nc3 Nc3 12.Bc3 Nd7=) 11.de6+– fe6 12.Bb5 Nc6 (12...Na6 13.Bc4 Bd5 14.Bf6 Qf6 15.Bd5 ed5 16.Nc3+–) 13.d4 Bd6 14.Nbd2 Nb4 15.Ba3 Qc7 (15...Rc8 16.Ng5 Bb8 17.Bb4 ab4 18.Bd3+– (18.Ne6?! Qd6 19.Nf4 g5=)) 16.h3 Nfd5 17.Rc1 Qe7 18.Bb4 (18.Qe1 Nc7 19.Be2 Qd8+–) 18...Bb4 (18...ab4 19.Qb3+–) 19.Ne5 (better 19.Qb3!?+–) 19...Nc3= 20.Qg4?? (better 20.Qe1=) 20...Nb5–+ 21.ab5 Bd2 22.Rc2 Bb4 23.Rfc1 Bd6 24.Nc6 (24.Nc4 Rf6 25.Nb6 Raf8–+) 24...Bc6 (24...Qd7 25.e4–+) 25.Rc6 a4 (25...Rab8 26.Qe4–+) 26.e4 (26.Rb6 a3–/+) 26...Bf4 (26...e5 27.Qg3–+) 27.Rd1 White prepares the advance d5 27...e5 (27...a3 28.g3 Bd2 29.Rd2–+) 28.d5–/+ a3 29.Ra1 (29.Rb6 a2 30.d6 Qf7–+) 29...Rf6 (29...Qb4 30.Rc7 Bh6 31.Rc2–+) 30.Rf6 Qf6 31.Qd7 a2 (31...h6 32.Qc6 Qd8 33.Qc3–+) 32.Qc6 Bd2?? (better 32...Qc6 33.bc6 Kf7–+) 33.Qa8+– Kf7 34.Qa7 Kg6 35.Ra2 Bc3 (35...Bg5 36.Ra6 Qf8 37.Qb6 Bf6 38.f4 ef4 39.e5+–) 36.Re2 (36.Rc2 Bd4 37.Rc6 Bf2 38.Kf1 Bh4 39.Rf6 Bf6 40.Qb6 Kg5+–) 36...Bd4 37.Kf1 (37.Rc2 Qf8+–) 37...Qg5 (37...Qf4 38.Qd7 Kh6+–) 38.f3 (better 38.Rc2 Qf4 39.Qd7+–) 38...Qc1= 39.Re1 Qc3 (39...Qc3 40.Qa2 Bc5+–) 0–1. KLINGON09 (1765) – kisei64 (1830), lichess.org, 2020.

5.c4 e6 6.e3 d5 7.Nf3 dc4 8.Bc4 Nbd7 9.0–0 Be7 10.d4 0–0 11.Nbd2 Bd5 12.Bd3 Bb7 13.Rc1 Rc8 14.Nc4 c5 15.bc6 Bc6 16.Nfe5 Ne5 17.Ne5 Be8 (17...Be4 18.Rc8 Qc8 19.Be4 Ne4 20.Qd3+=) 18.Be2 (18.Qb3 Rc1 19.Rc1 Qd5 20.Qb6 Ba4+–) 18...Rc1= 19.Qc1 (19.Bc1 Qd6=) 19...Bb4 (19...Ba4 20.Ba3=+) 20.Bf3 (better 20.Qc2!?+=) 20...Ba4=+ 21.Bc6 (21.Ba3 Qd6 22.Bb4 Qb4=+) 21...Bc6–/+ 22.Nc6 Qd6 23.Nb4 ab4 (worse 23...Qb4 24.Ba3 Qb5 25.Bf8 Kf8 26.Qc8 Qe8 27.Qb7+–) 24.Qc4 Nd5 (24...Ng4 25.g3=+) 25.Rc1 h6 26.g3 (26.e4 Nf4=+) 26...Ra8 (26...Rd8 27.Qb5–/+) 27.e4= Ne7 28.Qc7 (28.Qb5 Ra2 29.Rc2 Kh7=) 28...Qc7–/+ 29.Rc7 Ng6 (better 29...Ra2!? 30.Re7 Rb2–/+) 30.Rc4= Ra4 31.Bc3 Exerts pressure on the isolated pawn 31...b5 (31...Ra3 32.Bb4 Ra1 33.Kg2+=) 32.Rb4 Rb4 33.Bb4 Nf8 34.Kf1 Nd7 35.Ke2 f5 36.f3 Kf7 37.Kd3 Kf6 38.d5 (38.Bc3 g6+=) 38...ed5= Black gets the initiative 39.ed5 Ke5 40.d6 Kd5 41.f4 (41.Kc3!?=+) 41...g6 42.Kc3 h5 43.Ba3 Nf6 44.Kb4 Kd6 45.Kb5 Kd5 46.Kb6? (better 46.Bc5–/+) 46...Ng4–+ 47.h3 Nf2 48.h4 Ne4 49.Kc7 Ke6 (better 49...Ng3 50.Bd6 Ke4–+) 50.Kc6–/+ Ng3 51.Kc5?? (better 51.Bc5–/+) 51...Ne2–+ 52.Kc4 Nf4 53.Kd4 Ng2 54.Bc1 Nh4 55.Ke3 g5 56.Kf2 Kf6 57.Kg3 Kg6 (57...Ng6 58.Bb2 Ke6 59.Kh2–+) 58.Kh3 (58.Bd2 f4 59.Bf4 Nf5 60.Kf3 gf4 61.Kf4 Kf6–+) 58...f4 59.Kh2 Kf5 60.Kh3 Ng6 61.Kg2 g4 62.Kf2 h4 Black prepares the advance g3 63.Kg2 h3 64.Kf2 Nh4 (64...g3 65.Ke2–+) 65.Bd2 g3 66.Kg1 Kg4 (66...f3 67.Bc3 h2 68.Kh1 f2 69.Bd4 f1Q 70.Bg1 hg1Q) 67.Be1 Nf3 Black plans h2 68.Kf1 Ne1 (68...g2 69.Kf2 g1Q 70.Ke2 Qe3 71.Kd1 Qb3 72.Ke2 Qc2 73.Bd2 Qd2 74.Kf1 Qe1) 69.Ke2 h2 70.Kd2 h1Q 71.Kc3 g2 (71...Qc6 72.Kb4 g2 73.Kb3 Qb5 74.Kc3 g1Q 75.Kd2 Qe3 76.Kd1 Qbd3) 72.Kc4 (72.Kb4 Nd3 73.Kc4 Qc1 74.Kb5 Qc5 75.Ka6 g1Q 76.Kb7 Qb1 77.Ka6 Qbb6) 72...Nf3 (72...g1Q 73.Kb4 Qd4 74.Kb5 Qb7 75.Ka5 Qbb6) 73.Kc5 (73.Kd5 Qd1 74.Kc5 g1Q 75.Kb5 Qd5 76.Ka6 Qa1 77.Kb6 Qaa5) 73...g1Q 74.Kd6 (74.Kd5 Qb6 75.Kc4 Qc1 76.Kd3 Qbe3) 74...Qe1 (74...Qb6 75.Kd5 Qd1 76.Ke4 Qe3) 75.Kd7 (75.Kc5 Qc3 76.Kd6 Qh6 77.Ke7 Qhf6 78.Kd7 Qcc6) 75...Qhf1 (75...Qh7 76.Kc6 Qb4 77.Kd5 Qhe4) 76.Kc6 (76.Kd8 Qc4 77.Kd7 Qee6 78.Kd8 Qcc8) 76...Qfe2 (76...Qc4 77.Kd7 Qee6 78.Kd8 Qcc8) 77.Kb6 (77.Kc7 Qc4 78.Kd8 Qe5 79.Kd7 Qcc7) 77...Q2d2 (77...Qb4 78.Kc6 Qe6 79.Kc7 Qbb6) 78.Kb5 (78.Kc6 Qe8 79.Kc7 Qa5 80.Kd6 Qae5) 78...Qec1 (78...Qd5 79.Kb6 Qea5) 79.Ka4 (79.Ka6 Qb4 80.Ka7 Qca3) 79...Qdb2 80.Ka5 Qca1 0–1. BeepBeepImAJeep (2725) – caissaisabelle (2700), lichess.org, 2020.

5.e3 a5 6.c4 e6 7.Nf3 d5 (7...Bb4 8.Be2=) 8.Be2 Nbd7 9.0–0 Bd6 10.d4 0–0 11.Nbd2 Ne4 12.Rc1 Qe7 13.Ne4 de4 14.Ne5 (14.Nd2 Qh4 15.g3 Qg5=) 14...Ne5 (14...Be5 15.de5 Rfd8 16.Qc2=) 15.de5= Bc5 16.Qc2 Rad8 17.Rfd1 Rd7 18.Rd2 Rfd8 19.Rcd1 Bb4 20.Bc3 Bc3 (20...c5 21.Rd7 Rd7 22.Rd7 Qd7 23.Bb4 ab4 24.Qb2=) 21.Qc3+= g6 (21...Rd2 22.Rd2 Rd2 23.Qd2=) 22.g3 (22.Rd7 Rd7 23.Rd7 Qd7+–) 22...Kg7 23.Bf1 h5 (23...Rd2 24.Rd2 Rd2 25.Qd2+=) 24.Bg2 (24.Rd7 Rd7 25.Rd7 Qd7+–) 24...h4 (24...Rd2 25.Rd2 Rd2 26.Qd2+=) 25.Qc2 (25.Rd4!?+=) 25...Rd2= 26.Rd2 Rd2 27.Qd2 Qb4 28.Qc2 Qe1 29.Bf1 hg3 30.hg3 (worse 30.fg3 Qe3 31.Qf2 Qf2 32.Kf2 c6=+) 30...f6?? (30...c5!?=) 31.ef6?? (better 31.c5 Qa1 32.cb6 Qe5 33.Qc7 Qc7 34.bc7+–) 31...Kf6+= 32.c5 Bd5 33.cb6 cb6 34.Qc7 Bb3? (better 34...Qd1+=) 35.Qb6+– Bc2?? (35...Qb4 36.Qd8 Kf5+–) 36.Qd4 Kf5 37.Kg2 (37.Qc5 e5 38.Qc2+–) 37...Bd1 38.Qc5 e5 39.Qc8 (39.Qf8 Kg4 40.Qf6 Bf3 41.Kg1+–) 39...Kf6? (39...Kg5 40.Qd8 Kf5 41.Qf8 Kg4+–) 40.Qf8 Kg5 41.Qe7 Kf5 42.Qf7 Kg5 43.Qc4 (43.b6 Bf3 44.Kg1 Be2 45.Qe7 Kh6 46.Qh4 Kg7+=) 43...Kf5?? (43...Bf3 44.Kg1 Qb1+–) 44.Kg1 (44.b6 Bf3 45.Kg1 Qb1 46.Qf7 Kg5+–) 44...Bf3 (44...Ba4 45.b6 Qb1 46.Qf7 Kg5+–) 45.b6 Qd1 (45...Qb1 46.Qf7 Kg5 47.b7+–) 46.b7 Qd8 47.Qc8 Qc8 48.bc8Q Kg5 49.Qc5 (49.Qd8 Kf5 50.Ba6 g5 51.Qd6 Kg4 52.Qd7 Kh5 53.Qh7 Kg4 54.Bc8) 49...Bg4 (49...Kf5 50.Qe7 g5 51.Qf7 Kg4 52.Qd7 Kh5 53.Qh7 Kg4 54.Bh3) 50.Qe5 Bf5 (50...Kh6 51.Qh8 Kg5 52.f4 ef3 53.Qh4 Kf5 54.Qe7 f2 55.Kf2 Bh5 56.Bd3 Kg4 57.Qh4) 51.Qa5 (51.Qh8 Bg4 52.f4 ef3 53.Qh4 Kf5 54.Qe7 f2 55.Kf2 Bh5 56.Bd3 Kg4 57.Qh4) 51...Kg4 (51...Kh6 52.Qe5 g5 53.Qf5 Kg7 54.Bc4 Kh6 55.Bg8 Kg7 56.Qf7 Kh6 57.Qh7) 52.Qb4 (52.Be2 Kg5 53.Qd8 Kh6 54.Qh8 Kg5 55.Qh4) 52...g5 (52...Kg5 53.Qf8 Bg4 54.Bh3 Bf5 55.Qd8 Kh6 56.Qh8 Kg5 57.Qh4) 53.Qd6 (53.Be2 Kh3 54.Qb1 Be6 55.Qf1) 53...Bg6 (53...Kh5 54.Bc4 Be6 55.g4 Kg6 56.Qe6 Kg7 57.Qf7 Kh6 58.f4 ef3 59.Qf8 Kg6 60.Bd3) 54.Be2 (54.Qd7 Kf3 55.Qd1) 54...Kh3 55.Qe6 g4 (55...Bf5 56.Qh6) 56.Qg6 (56.Bg4) ½–½. BeepBeepImAJeep (2515) – CheeseMouse (2570), lichess.org, 2017.

5.e3 c5 6.Nf3 d5 7.c4 e6 8.Be2 Nbd7 (8...Bd6 9.0–0=) 9.Qc2 (9.0–0 Bd6=) 9...Bd6 10.d3 (10.cd5 ed5 11.0–0 Rc8=) 10...Qc7 (10...dc4 11.dc4 Qc7 12.Nbd2=) 11.Nbd2 h6 (11...0–0 12.cd5 Bd5 13.Rc1=) 12.h3 (12.cd5 ed5 13.Nh4 0–0=) 12...Rg8 (12...0–0 13.cd5 Nd5 14.0–0=) 13.0–0–0 (13.cd5 Nd5 14.Nc4 Rd8+=) 13...e5= 14.e4 (14.cd5 Nd5 15.Kb1 Nb4=) 14...d4 15.Nh4 (15.Qb3 0–0–0+=) 15...Nf8 (15...g6 16.g3+=) 16.Nf5 Ng6 (16...Ne6 17.Kb1+=) 17.Nf3 (17.Bf3 0–0–0+=) 17...0–0–0 (17...Nf4 18.Kb1+=) 18.Kb1 (18.Nd6 Qd6 19.Kb1 Nf4+=) 18...Kb8 19.Bc1 Bc8 20.Nd6 Qd6 21.g3 Be6 (21...Rge8 22.Bf1+=) 22.Nd2 (22.Bf1 Rge8+=) 22...Qd7 (22...Rge8 23.Bf3+=) 23.Bf1 (23.h4 h5+=) 23...Nh7 (23...h5 24.Nf3+=) 24.Bg2= h5 25.Nb3 h4 (25...Qd6 26.Rde1=) 26.f4+= f5? (better is 26...ef4!? 27.gf4 f5+=) 27.ef5+/– Bf5 28.g4 Nf4 29.gf5 Ng2 (29...Qf5!? 30.Bf4 ef4+/–) 30.Qg2+– Qf5 31.Rhg1 (31.Rhf1 Qd7+–) 31...Nf6 (31...g5 32.Qc6 Qg6 33.Qg6 Rg6 34.Rdf1+–) 32.Qc6 Nd7 33.Bg5 Rc8 34.Qd6 Ka7?? (34...Rc7+–) 35.Rgf1 (35.Rgf1 Qh3 36.Rf7+–) 1–0. Timmermans,A – Vos,J, Dordrecht, 2001.

5.e3 c5 6.Nf3 d6 7.Be2 Nbd7 8.0–0 Qc7 9.c4 g6 10.d4 Bg7 11.Nbd2 cd4 12.Nd4 Nc5 13.Bf3 0–0 14.Bb7 Qb7 15.Nc6 Rae8 16.Nb3 Nfd7 17.Bg7 Kg7 18.Rc1 (18.Nc5 Nc5 19.Qd4 f6=) 18...Kg8 19.Nbd4 (19.Re1 Nb3 20.Qb3 Nc5=) 19...Ne5 (19...Qc7 20.Rc3=) 20.Ne5+= de5 21.Nc6 f6 22.Qc2 Rc8 23.Rfd1 Rc7 24.Rd5 Rd7 (24...Rc6 25.bc6 Qc6 26.Ra1+=) 25.Rcd1 (better 25.Na5 ba5 26.Rc5+–) 25...Rc8?? (better 25...Rc7+–) 26.Rd7+– Nd7 27.Ne7 Kf7 (27...Kg7 28.Nc8 Qc8 29.Rd6+–) 28.Nc8 (28.Nc8 Qc8 29.Qe4+–) 1–0. BeepBeepImAJeep (2645) – berval (2405), lichess.org, 2015.

5.e3 c6 6.c4 cb5 7.cb5 e6 8.Nf3 Bb4 9.Be2 0–0 10.0–0 d6 11.d4 Nbd7 12.Nbd2 (12.Bc3 Nd5 13.Bb4 Nb4=) 12...Nd5 13.Rc1 Rc8 14.Qb3 N5f6 (14...Qe7 15.Bc4=) 15.Bc3 Bc3 16.Rc3 Rc3 17.Qc3 Ne4 (17...Qb8 18.Rc1=) 18.Ne4+= Be4 19.Rc1 Nf6 20.Qc7 Qc7 21.Rc7 Nd5 (21...Ba8+=) 22.Rd7 (better 22.Rc6+–) 22...Nc3= 23.Kf1 d5 (23...Na4 24.Rd6 Rc8 25.Ke1=) 24.Nd2 (24.Rb7 Na4 25.Ne5 Rc8=) 24...Na4 (24...Bg6 25.Ke1 Na4 26.Rb7=) 25.Ne4= de4 26.Rd6 Rb8 27.Ke1 (27.Rc6 Nb2=+) 27...Nc3 (27...Nb2 28.Kd2 a4 29.Kc2–/+) 28.Kd2 Nd5 29.f3 ef3 30.Bf3 Nb4 (30...Kf8 31.Rd7=+) 31.Bc6 (31.Rd7 h6=+) 31...Kf8–/+ (31...Nc6?? 32.bc6 Rc8 33.c7+–) 32.Kc3 g5 (better 32...Rc8–/+) 33.Be4?? (33.Kb3 h5=+) 33...h5?? (better 33...Ke7 34.Rc6 Nc6 35.Bc6 f5–+) 34.h3?? (better 34.Rd7–/+) 34…Ke7–+ (34...Ke7 35.Rc6 Nc6 36.Bc6 f5–+) 0–1. DoctorMabuse (1875) – Kabatana_Michael (1895), lichess.org, 2020.

5.e3 d6 6.c4 e5 7.Nf3 Be7 8.Be2 0–0 9.0–0 Nbd7 10.d4 ed4 11.Nd4 Nc5 12.Nd2 Nce4 13.Ne4 Ne4 14.Bf3 f5? (14...Re8 15.Qd3 Bf6 16.Rfd1=) 15.Qc2 (better 15.Ne6 Qd7 16.Nf8 Rf8 17.Rb1+–) 15...Qc8+= 16.Rad1 Bf6 17.Ba1 Be5 18.Ne2 Ba1 19.Ra1 Nc5 20.Bb7 Qb7 21.Nd4 g6 22.Nc6 Rae8 23.Rad1 Qc8 24.Rd4 Qe6 25.Rfd1 (25.Rf4 Qf6=) 25...Qf6 (25...f4 26.Re1=+ (26.Rf4?? Rf4 27.Nd4 Qe4–+)) 26.g3 Ne4 27.h4 g5 28.hg5 Qg5 29.Rd5 Rf6 30.Nd4 Ref8?? (30...Qg4 31.Qe2=+) 31.Nf3?? (better 31.Qe4! Qg3 32.Qg2+–) 31...Qg4=+ 32.Nh2 (32.Kg2 Rh6 33.Ng1–+) 32...Qh3–/+ 33.Qe2? (better 33.Ra1!?–/+) 33...Rh6–+ The mate threat is Qxh2 34.f3 Ng3 (better 34...Qg3!? 35.Qg2 Qg2 36.Kg2 Nc3–+) 35.Qg2–/+ (35.Qg2 Qg2 36.Kg2–+). BeepBeepImAJeep (2555) – oslochess (1965), lichess.org, 2016.

5.e3 d6 6.Nf3 Nbd7 7.c4 g6 8.Be2 Bg7 9.0–0 0–0 10.d4 Re8 11.Nc3 e5 12.Rc1 ed4 13.Nd4 Nc5 14.Ba3 Nce4 15.Ne4 Ne4 (worse 15...Re4 16.Bf3+–) 16.Bf3 Qd7 17.Qc2 h5 18.Ne2 Nc5 19.Bb7 Nb7 20.Nf4 Rad8 (20...Rac8 21.Bb2+=) 21.Nd5 Nc5 22.Bc5 dc5 23.Rfd1 Qc8 24.Rd3 Rd6 25.Rcd1 Kf8 26.Nf4 Rd3 27.Qd3 Be5 28.Nd5 Qe6 29.f4 Bd6 30.Kf2 (30.Qc3 f6+–) 30...Kg7+= 31.h3 Rd8 32.Kf3 (32.e4 f6+–) 32...f5 33.e4 White fights for the Initiative 33...fe4 34.Qe4 Qe4 35.Ke4 Re8 (35...h4 36.Kf3+=) 36.Kf3+– Rf8 37.g3 Re8? (better 37...Rd8+–) 38.Nb6!+– h4 (38...cb6 A deflection 39.Rd6 Eliminates the defender d6) 39.Nd5 hg3 (39...Kf7 40.gh4 Re6 41.Rg1+–) 40.Nc7!! (40.Kg3?! Re4 41.Rc1 Re2+–) 40...g2 (40...Bc7 41.Rd7 Theme: Double Attack) 41.Ne8 (41.Ne8 Kf8 42.Nd6+– (42.Rd6?! g1Q 43.Nf6 Qf1 44.Kg3 Ke7=); 41.Rd6?! g1Q 42.Ne8 Kf7=) 1–0. BeepBeepImAJeep – penguingim1 (2640), lichess.org, 2018.

5.e3 d6 6.Nf3 Nbd7 7.d4 e6 8.Nbd2 Qe7 9.Bd3 (9.c4 e5=) 9...e5 10.de5 de5 11.Bc4 h6 12.0–0 Rg8 (12...0–0–0 13.Qe2=) 13.Qb1 (13.Ba3 Qd8=) 13...g5 14.Ba3 Nc5 15.Nb3 (15.Qa2 Rg7+=) 15...Nfd7 16.Nc5 bc5 17.Qb3 Nb6? (better 17...Bf3 18.gf3 Rd8+=) 18.Bc5!+– Qc5 Deflection from f7 (18...Qf6 19.Bb6 cb6 20.Ne5 Rg7+–) 19.Bf7 Demolition of pawn structure 19...Kd7 (19...Kd8 20.Rfd1 Bd6 21.Bg8 e4+–) 20.Qe6 Kd8 21.Qe8 1–0. onur604 (2320) – igor102 (2155), lichess.org, 2020.

5.Nf3 d5 6.e3 =.

5.Nf3 d6 6.e3 Nbd7 7.Be2 g6 8.0–0 Bg7 9.c4 0–0 10.Nc3 e5 11.d4 ed4 12.Nd4 (12.ed4 Re8+=) 12...Nc5= 13.Bf3 Bf3 14.Nf3 Nfd7 (14...Nfe4 15.Nd4=) 15.Qe2 Ne5 16.Ne5 Be5 17.Rfd1 Qg5?? (better 17...Qh4 18.g3 Qd8+=) 18.f4+– Bf4 19.ef4 Qf4 (19...Qd8+–) 20.Rf1 (better 20.Nd5 Rfe8 21.Nf4 Re2 22.Ne2+–) 20...Qe5 21.Qe5 de5 22.Nd5 e4 (22...Nd3 23.Nf6 Kg7+–) 23.Nf6 (23.Ne7) 23...Kg7+– 24.Ne4 (24.Ne4 f6 25.Bf6 Kg8 26.Nc5 bc5 27.Be5+–) 1–0. e4_e5_f4 – soultanbeieff, lichess.org, 2020.

5.Nf3 e6 6.c4 (6.e3 d5=) 6...Be7 (6...Bb4 7.g3=) 7.e3 (7.g3 0–0=) 7...0–0 (7...d6 8.Nc3=) 8.Be2 d5 (8...Bb4 9.Nc3=) 9.0–0 c6 (9...Nbd7 10.d4=) 10.Nc3 dc4 (10...c5 11.cd5 ed5 12.d4=) 11.Qc2 (11.Ne5 cb5 12.Nb5 c3 13.Nc3 Nc6+=) 11...cb5= 12.ab5 (12.Nb5!? Na6 13.Bc4=) 12...Nbd7+= 13.Bc4 Bf3 14.gf3 Ne5 15.Be2 Rc8 16.Rad1 (16.d4 Nc4+=) 16...Nd5 (16...Nc4 17.f4+=) 17.Qe4+= Bd6 (17...Bf6!?+=) 18.Nd5+= ed5 19.Qd5 Rc5 20.Qe4 Qg5 (20...Re8!? 21.d4 Nd3 22.Qe8 Qe8 23.dc5 Bh2 24.Kh2 Qe7+/–) 21.Kh1+= Qh5 22.Be5 (better is 22.Rg1!?+=) 22...Re5 (22...Be5 23.f4 Qe2 24.fe5=) 23.Qg4 (better is 23.f4 Qh2 24.Kh2 Re4 25.Rc1=) 23...Qh6 (better is 23...Rb5!? 24.Qh5 Rh5+=) 24.f4+= Re6 25.Rc1 Rg6 (25...a4 26.d4+=) 26.Qh5 (26.Qf3+=) 26...Bb4 (better is 26...a4!?+=) 27.d4 (27.Qh6 Rh6 28.d4 Re6+/–) 27...Re8 (27...Qh5 28.Bh5 Rd6 29.Rc7+/–) 28.Qh6 Rh6 29.Rc6 (29.Rc4 Rf6+/–) 29...Rd6 (29...Rc6!? 30.bc6 Rc8+/–) 30.Rfc1 (30.Kg2 Kf8+/–) 30...Rb8 (30...Kf8 31.Kg2+–) 31.R1c4 (31.Kg2 g6+–) 31...Kf8 (31...Rbd8 32.Kg2 Kf8 33.Bg4+/–) 32.Bg4 (32.Rc7 Rbd8+–) 32...g6 (better is 32...Rbd8+–) 33.Rc8 (better is 33.Rb4 Rc6 34.bc6 ab4 35.c7+–) 33...Rc8+/– 34.Rc8 Kg7 (34...Ke7 35.Kg2+=) 35.Bf3+/– f5 (35...h6 36.Rc7+/–) 36.Rc7 Kh6 (better is 36...Kf6+/–) 37.Bc6 (better is 37.h4+/–) 37...a4= 38.Rb7 Ba5 39.Be8 Rd5 (better is 39...a3 40.Bf7 g5=) 40.Bc6 (40.Rc7 a3+=) 40...Rd6 41.Ra7?? (better is 41.Be8=) 41...a3–+ 42.d5 (42.Kg2 a2–+) 42...a2 43.Kg2 a1Q 44.Re7 Qa2 45.Rb7 Be1 0–1. tightfist (2205) – kode (2420), net–chess.com, 2008.

5.e3 e6

6.c4 d5 7.Nf3 Bb4 8.Be2 Nbd7 9.0–0 0–0 10.cd5 Bd5 (10...Nd5 11.Nc3=) 11.d3 Nc5 12.Nc3 Bb3 13.Qc1 (13.Qb1 Qd6+=) 13...Re8 (better 13...Nd3 14.Bd3 Qd3=+) 14.d4+= Nce4 15.Ne4 Ne4 16.Bd3 Qd5 (16...f5 17.Bc4 Bc4 18.Qc4+=) 17.Be4 (better 17.Qc7 Rec8 18.Qb6+–) 17...Qh5?? (better 17...Qe4 18.Qc7 Bd5+=) 18.Ba8+– Ra8 Black gets strong initiative 19.Qc7 Bd5 20.Ne5 f6 21.Nc6 (21.Nd7 Qg5 22.Qg3 Qg3 23.hg3 Be4+–) 21...Qg6 (21...Qg5 22.g3 Qf5 23.f3+– (23.Qb6 Qf3 24.Ne7 Be7–+; 23.Nb4 ab4 24.f3 Bf3+–)) 22.g3 (better 22.f3 Qe8 23.Nb4 ab4 24.Qb6 Rb8+–) 22...Qe4 Threatening mate: Qg2 23.f3 Qe3 24.Kg2 Qb3 25.Rab1 (better 25.Rf2!? Bf3 26.Kg1 Bd5+–) 25...Qc2 26.Kh3 Qd3 (26...Kh8 27.Qb6 Bc4 28.Nb8 Bf1 29.Rf1 Qf5 30.Kg2+–) 27.Qb7 (27.Nd8!? Qg6+–) 27...Rf8 28.Rbd1 (better 28.Rbc1+–) 28...Qe2 29.Qb6?? (better 29.Bc1 Bb3 30.Bh6 (worse 30.Nb4 Bd1 31.Rd1 Qd1=+) 30...gh6 31.Ra1+–) 29...Bf3= Do you see the mate threat? 30.Rg1?? (better 30.Rf3 Qf3 31.Ne7 Kf7 32.Rb1=+) 30...Bg4 31.Kh4 g5 0–1. retiponziani (1875) – Springwood (1910), ChessWorld.net, 2010.

6.c4 Be7 7.Nf3 d5 8.Be2 0–0 9.0–0 dc4 10.Bc4 Nbd7 11.d4 c6 12.Nbd2 cb5 13.Bb5 Rc8 14.Qb3 Nd5 (14...Bb4 15.Rac1=) 15.Nc4 (15.Rac1 Nc7+=) 15...N7f6= 16.Nfe5 Bb4 17.Rac1 Qe7 (17...Be7 18.f3+–) 18.Rc2 (18.f3 Rb8+–) 18...Rc7 19.Rfc1 Rfc8 20.Na3 (20.f3 Qd8+=) 20...h6 (20...Bd2 21.Rc7 (21.Rd2? Rc1 22.Bf1 R1c3–+) 21...Nc7 22.Rc2=) 21.h3 (21.Bd3 Nd7+=) 21...Ne4 22.Rc7 Rc7 23.Rc7 Qc7 24.Bd3 Nef6 25.Nb5 Qe7 26.Nc4 Nc7 (26...Ba6 27.g3=) 27.Nb6+– Nb5 28.Bb5 Qd6 29.Nc4 Qd5 Threatening mate: Qxg2 30.f3 Nh5 31.Qc2 Qg5 32.e4 (32.Qf2 Qg6+–) 32...Nf4+= 33.Kh2 (33.Kh1+=) 33...f5 (better 33...Be1!? 34.Kh1 Qg3=) 34.Bc1 e5?? (better 34...Qh4 35.ef5 Bf3+–) 35.Ne5+– Bd6 (35...Be1 36.Bd7 fe4 37.Qc4 Kh7 38.g4+–) 36.Qd2 (better 36.g3 Be5 37.de5+– (37.gf4 Bf4 38.Bf4 Qf4 39.Kg2 fe4–/+)) 36...Nh3 (36...Ne6 37.Qg5 Ng5 38.Bg5 hg5 39.ef5+–) 37.gh3 (37.Qa2 Kh7 38.Bg5 (38.gh3?! Qc1 39.Qf7 Qd2 40.Kh1 Qe1 41.Kg2 Qd2 42.Kf1 Qd1 43.Kg2 Qd2 44.Kh1 Qe1 45.Kg2 Qd2=; 38.Kh3 Qc1 39.Qf7 Qh1 40.Kg3 Qe1 41.Kh2 Be5 42.de5 Qh4 43.Kg1 Qe1 44.Bf1 Ba6=) 38...Ng5 39.f4 Be4 40.fg5 hg5 41.Qf7 Be5 42.de5 Bc6 43.Qh5 Kg8 44.Bc4 Bd5 45.Bd5 Kf8 46.Qf7) 37...Qh4 38.Qg2 g5 (38...fe4 39.Bc4 Kh8 40.fe4 Be4 41.Qg3 Qg3 42.Kg3+–) 39.Bb2 (better 39.Qa2 Kh8 40.Qe6 Be4 41.Be3+–) 39...fe4 40.Bc4 Kf8 (40...Kg7 41.fe4 Be4 42.Qg3 Qg3 43.Kg3+–) 41.fe4 (better 41.Ba3! Qf4 42.Kh1 ef3 43.Bd6 Kg7+–) 41...Be4 (41...Qf4 42.Qg3 Qd2 43.Kg1 Be4 44.Qf2 Qf2 45.Kf2+–) 42.Qf1 Ke8 (42...Qf4 43.Qf4 gf4+–) 43.Qf7 (43.Qf7 Kd8 44.Qd7) 1–0. BeepBeepImAJeep (2600) – lkman27 (2365), lichess.org, 2018.

6.Nf3 c5 7.Be2 d5 8.0–0 Bd6 9.d4 c4 10.c3 Ne4 11.Ne5 (11.Ba3!?=) 11...Be5=+ 12.de5 Nd7 13.f3 Nec5 14.f4 Ne4 (14...0–0 15.Ba3=+) 15.Nd2= Ndc5 16.Ba3?? (16.Ne4 Ne4 17.Bf3 Nc5=) 16...Rc8?? (better 16...Nc3 17.Qe1 N5a4–+) 17.Ne4= Ne4 18.Qc2 f5 (18...Qc7 19.Rad1=) 19.Bf3 Kf7 20.Be4 de4 21.Rad1 Bd5 22.Rd4 g6 23.Bd6 g5 (23...Qh4 24.Qd2+–) 24.g3 (24.Qe2 gf4 25.ef4 Rg8+–) 24...Rg8 (24...h5 25.Qd1 Qg8 26.fg5+–) 25.fg5 (25.Rfd1!?+–) 25...Qg5= 26.Rf4 h5 27.Qe2 h4 28.g4 Ke8 29.h3 Kd7 30.Kf2 fg4 31.Qg4 Qg4 32.Rg4 Rg4 33.hg4 Rg8 34.Kg2?? (better 34.Rd1=) 34...Rg4–+ 35.Kh3 Rg3 36.Kh4 Re3 37.Rd1 Rc3 38.Kg5 (38.Rg1 e3 39.Rg7 Ke8 40.Rg8 Kf7 41.Rf8 Kg7–+) 38...Rg3 39.Kf4 (39.Kh4 Rf3 40.Rg1 Rf7–+) 39...Rf3 40.Kg4 (40.Kg5 e3 41.Re1 c3–+) 40...c3 41.Rc1 (41.Rh1 c2 42.Rh7 Ke8 43.Rh8 Kf7 44.Rf8 Kg7–+) 41...Bb3 (better 41...e3 42.Rc2 Rf2 43.Rc3–+) 42.Ba3 (42.Rh1 c2–+) 42...c2 (42...Ba4 43.Re1 c2 44.Bb2 Bb5 45.Re4–+) 43.Re1 (43.Rh1 Rc3 44.Rf1 Ba4 45.Rf7 Kc8 46.Rf8 Kb7 47.Rf7 Rc7 48.Rc7 Kc7–+) 43...Rd3 (better 43...Ba4 44.Bb2 Bb5 45.Re4–+) 44.Re4 (44.Rf1 Ba4 45.Rf7 Kc8 46.Rf8 Kc7 47.Rf7 Rd7 48.Rd7 Kd7–+) 44...Rd1 (better 44...Bd5 45.Re1 Ra3–+) 45.Re3 (45.Rf4 c1Q 46.Rf7 Kc8 47.Rf8 Kb7 48.Bc1 Rc1–+) 45...Bd5 46.Rc3 Rd4 (46...Ra1 47.Bb2 Ra4 48.Kg5–+) 47.Kg3 Ra4 48.Bc1 Rc4 (48...Be4 49.Kf2 Rb4 50.Re3–+) 49.Rc4 Bc4 50.Kf4 a4 (better 50...Bb5 51.Ke3–+) 51.Ke3 Bb5 52.Kd4 (52.Kd2 Kc6 53.Kc2 Kd5–+) 52...a3 (better 52...Be2–+) 53.Kc3?? (53.Ba3 Kc6–+) 53...Ba4 (better 53...a2 54.Kb2 Bc4–+) 54.Kb4?? (54.Ba3 Kc6 55.Kd4–+) 54...a2 55.Ka4 (55.Bb2 c1Q! 56.Ka4 b5 57.Ka5 Qb2 58.Kb6 Qd4 59.Kb5 Qc3 60.Ka6 a1Q 61.Kb5 Qaa5) 55...a1Q 56.Kb5 (56.Kb3 Qc1 57.Kc3 Qd1 58.Kb4 c1Q 59.Kb5 Qd3 60.Kb6 Qc7) 56...Qc1 57.Kc4 Qd2 58.Kb5 c1Q 59.Kb6 Qdb2 (59...Qdb2 60.Ka5 Qca1) 0–1. BeepBeepImAJeep (2545) – Crew64 (2510), lichess.org, 2018.

6.Nf3 d5 (6...Bc5 7.d4 Bb4 8.c3=) 7.Be2 Bd6 8.0–0 0–0 9.d3 (9.Be5 Be5 10.Ne5 c5=) 9...Re8 (9...c6 10.Na3=) 10.Nbd2 c6 11.c4 cb5 (11...e5 12.Rc1=) 12.cb5 (12.ab5 Nbd7=) 12...Nbd7 (12...e5 13.Rc1=) 13.Nd4 Rc8 14.f4 e5 (14...Qe7 15.Rc1=) 15.Nf5 Bf8 (15...Bc7 16.fe5 Be5 17.Be5 Ne5 18.Qe1=) 16.fe5+= Ne5 17.Nb3 (17.Rc1 Rc1 18.Qc1 Bb4+=) 17...g6 (17...Ned7 18.Bd4+=) 18.Ng3 h5 (better is 18...Bh6 19.Bd4 Ned7+=) 19.Rf2 (better is 19.Rc1+=) 19...Nfg4–/+ 20.Bg4 Ng4 Black intends Qh4 (worse is 20...hg4 21.Be5 Re5 22.Qg4+/–) 21.Rf3 (better is 21.Re2!? Ne3 22.Qe1–/+) 21...Ne3–+ (21...Re3?! 22.Bf6 Qd6 23.Bd4–/+) 22.Re3 Re3 23.Nh5 (23.Bd4 Re6–+) 23...d4! 24.Bd4 (24.Nd4 gh5) 24...Re6 (24...Bc5 25.Bc5 bc5 26.Qg4 Qd3 27.Na5–+) 25.Qg4 (25.Nf4 Rd6 26.Be5 Qg5+=) 25...Qd5–/+ 26.Nf4 Qb3 27.Ne6 Qe6 28.Qe6 fe6 29.Bb6 Bc5 (29...Rc2!? 30.Bf2 Bg7–+) 30.Bc5–/+ Rc5 31.Ra2 (31.Rf1 e5–/+) 31...e5 (31...Rc3!? 32.Kf2–+) 32.Kf2–/+ Rc3 33.Rd2 (33.Re2 Rd3 34.Re5 Rd2 35.Re2 Re2 36.Ke2 Kf7+=) 33...Kf7–+ 34.Ke3 (34.d4 e4 35.Ke2–+) 34...Ke6 35.g4 (35.Ra2 e4–+) 35...Ra3 36.Rc2 (36.Rf2 Ra4 37.h3 Ra3–+) 36...e4 (36...Ra4!? 37.g5–+) 37.Rc7 Rd3 38.Kf4 (38.Ke2 Bd5 39.Rg7 Ra3 40.Rg6 Ke5–+) 38...Rf3 (38...e3 39.Rc2–+) 39.Kg5 Rf7 (39...e3!? 40.Rc1–+) 40.Rc3 (40.Rc2 Rf1 41.Kg6–+) 40...Ke5 (40...Rf2!? 41.Kg6 Rh2 42.Ra3–+) 41.Kg6–/+ Rf3 42.Rc7 Bd5 43.h4 (43.Re7 Kd6 44.Re4 Be4 45.Kg7–+) 43...e3 44.Rc1 Rf4 45.Kg5 (45.g5 Rh4 (worse is 45...Ra4 46.h5–+) 46.Re1 Re4–+) 45...Ra4 (45...e2 46.Re1 Bf3 47.Kh6–+) 46.h5 (46.Re1 Ke4 47.h5 Rb4–+) 46...Be6 (46...Bf3 47.Kh6–+) 47.h6 (47.Rc5 Kd6 48.Rc1 Rg4 49.Kf6 Rf4 50.Kg6 e2–+) 47...Rg4 48.Kh5 Rg2 49.b6 Bf7 (49...Kf5 50.Kh4 Rg4 51.Kh3–+) 50.Kh4 Rg6 (50...Rh2 51.Kg3 Rh6 52.Re1–+) 51.b7 (51.h7 Rh6 52.Kg3–+) 51...Rh6 52.Kg4 Rb6 53.Kf3 Bd5 (53...Rb7 54.Re1–+) 54.Ke3 Rb3 55.Kd2 Rb7 (55...a4 56.Ra1 Bc6 57.Ra3 Rb2 58.Kd3 Rb7 59.Kc3–+) 56.Ra1 Rb5 (56...Ra7 57.Kc3–+) 57.Kd3 Kd6 58.Kd4 (58.Ra3 Bc6–+) 58...Rc5 (58...Rb4 59.Kc3 Rc4 60.Kb2–+) 59.Rb1 (59.Ra4 Bb3 60.Ra1 Rc4 61.Ke3 a4–+) 59...Rc4 60.Kd3 Kc5 61.Rb8 (61.Re1 Be4 62.Ke3 a4–+) 61...Be4 62.Kd2 a4 63.Rc8 Bc6 64.Kd3 (64.Rc7 a3 65.Ra7 Kb4–+) 64...Kb4 (better is 64...a3 65.Rc6 Kc6 66.Kc4–+) 65.Rb8 Bb5 66.Kd2 (66.Ke3 a3 67.Ra8 Kb3–+) 66...a3 67.Rg8 (67.Ra8 Kb3–+) 67...a2 68.Ra8 (68.Rg1 Rf4 69.Ra1 Rf1 70.Ra2 Rf2 71.Ke3 Ra2–+) 68...Kb3 (68...Ba4 69.Rb8 Kc5 70.Rc8 Kd4 71.Rc4 Kc4 72.Ke3–+) 69.Ra5 (69.Ra2 Ka2 70.Kd3 Kb3–+) 69...Rc2 (better is 69...Ba4 70.Rd5 Rc2 71.Ke3–+) 70.Kd1 Ba4 71.Ra4 Ka4 72.Kc2 0–1. Eckhoff,Karlheinz (1690) – Krek,Janez (1960), Raika op 6th, 1997.

6.Nf3 Be7 7.Be2 c6 8.0–0 cb5 9.ab5 0–0 10.c4 d5 11.d4 dc4 12.Bc4 Nbd7 13.Nbd2 Rc8 14.Bd3 Re8 15.Rc1 Nd5 16.Qb3 Nb4 17.Bb1 Rc1 18.Rc1 Nf6 19.Ne5 (19.Qa4 Bd6=) 19...Bd5 (19...Qa8 20.Ndf3=) 20.Qd1 Ba8 21.Ndf3 Qd5 22.h3 (better 22.Qa4!?+=) 22...Qb5=+ 23.Ba3 Nfd5 (23...Bd6 24.Bb4 Qb4 25.Bd3=+) 24.Nd3 (24.Nf7 Rf8 25.N3e5 Nf6+–) 24...Nd3 (24...Na2! 25.Ba2 Ba3–/+) 25.Bd3= Qd7 26.Ne5 Qd8 27.Bb2 (27.Bh7 Kh7 28.Qh5 Kg8 29.Qf7 Kh7 30.Qg6 Kg8 31.Qf7 Kh7 32.Qg6 Kg8 33.Qe6 Kh7 34.Qg6 Kg8 35.Qf7 Kh8 36.Be7 Ne7+–) 27...Bf6 (27...Rf8 28.Qa4=+) 28.Qb3 (28.Bh7 Kh7 29.Qh5 Kg8 30.Qf7 Kh7 31.Qg6 Kg8 32.Qf7 Kh8 33.Qh5 Kg8 34.Qf7=) 28...Nb4 (28...Be5 29.de5 Nb4 30.Bf1–/+) 29.Bb1 (29.Bb5 Re7=+) 29...Bd5 (29...Qd5 30.Qd5 Nd5 31.g3–/+) 30.Qd1 g6 (30...Be5 31.de5 Qg5 32.e4=+) 31.Nd3 Ba8 (31...Na2 32.Ba2 Ba2 33.Qf3=+) 32.Nf4 (32.Nb4!? ab4 33.Qa4=) 32...Nd5 33.Ne2 Nb4 (33...Bg5 34.Qd3=+) 34.e4 (34.Nf4!?=) 34...Bg7 35.e5 (35.Bc3 Qe7–/+) 35...Qd5 Threatening mate: Qxg2 36.Nf4 Qd7 37.Ba3 (37.Qg4 b5–/+) 37...Nd5 (37...Bh6!? 38.g3–+) 38.Ne2 Rd8 39.Qb3 h5 (39...b5 40.Bd6–/+) 40.Be4 a4 41.Qb2 b5 (41...Bh6 42.Rb1–/+) 42.Rb1 (42.Bd6 Bc6=+) 42...Rb8 (42...Nb6 43.Ba8 Nc4 44.Qb5 Qb5 45.Rb5 Ra8 46.Bb2–/+) 43.Bc5 b4 44.Qa2 (44.Bd6!? Rb6 45.Qd2–/+) 44...b3–+ 45.Qa3 Bf8 (45...Nf4 46.Nf4 Be4 47.Rb2–+) 46.Bf3 Bc5 47.Qc5 Rc8 (47...Qe7 48.Qc1–+) 48.Qa5 Rb8?? (better 48...Bc6–+) 49.Ng3?? (49.Qc5 Kg7 50.Qc1–+) 49...Qb5 Black plans b2 (better 49...Qc7 50.Qa6 Nc3–+) 50.Qd2? (50.Qa7 Nc3 51.Ba8 Nb1 52.Ne4–+) 50...a3 Black prepares b2 51.Ne4 (51.Be4 b2 52.Nh5–+) 51...a2 52.Ra1 (52.Qb2 ab1R 53.Qb1 b2–+) 52...b2 53.Ra2 b1Q 54.Kh2 Qa2 (better 54...h4 55.Qe2 Qe2 56.Re2 Qc1–+) 55.Qa2 Qb2 56.Qb2 (56.Qa7 Rf8 57.Nf6 Nf6 58.Ba8 Nh7–+) 56...Rb2 57.Nd6 (57.g4 h4 58.Kg1 Rb4–+) 57...Rf2 58.Ne4 Ra2 59.Ng5 Ne3 60.Nh7 (60.Ba8 Ra8 61.Kg3–+) 60...Ng2 (better 60...Bf3 61.Nf6 Kh8 62.Kg3 Bg2 63.Kf4–+) 61.Nf6 (61.Nf6 Kg7 62.Ne8 Kf8 63.Ba8 Nf4 64.Kg3 Ne2 65.Kh4 Ke8 66.Bc6 Ke7 67.d5–+). BeepBeepImAJeep (2700) – Tijdverspilling (2500), lichess.org, 2016.

6.Nf3 Be7 7.Be2 d6 8.0–0 Nbd7 9.h3 Nc5 10.d3 h6 11.Nbd2 g5 (11...0–0 12.c4=) 12.Nh2 Rg8 13.e4 (13.Bf6 Bf6 14.d4 Nd7+=) 13...h5 (13...Qd7 14.f3 e5 15.c3=) 14.Bh5+– Nh5 15.Qh5 Qd7 (15...Bf6 16.Bf6 Qf6 17.Nb3+–) 16.Ng4 (16.Bd4 e5 17.Bc5 dc5+–) 16...0–0–0 (16...e5 17.Ne3+–) 17.Nf6 (17.Rfe1 Qe8+–) 17...Bf6 18.Bf6 Rde8 19.Bg5 Rh8 (19...f5 20.ef5 ef5 21.Rab1=) 20.Qe2 Reg8 21.Bf6 (21.Qe3!? e5 22.h4=) 21...Rh6= 22.Bd4?? (better 22.d4 e5 23.Ra3= (23.dc5?? Rg2 24.Kg2 Qh3 25.Kg1 Qh2; 23.de5?? Rg2 24.Kg2 Qh3 25.Kg1 Qh2)) 22...e5–+ 23.Bc5 (23.f4 Qh3 24.Qf3–+) 23...Qh3 (23...Rg2 24.Kg2 Qh3 25.Kg1 Qh2) 24.f3 (24.f4 Qh2 25.Kf2 Rg2 26.Ke1 Re2 27.Kd1 Rd2 28.Kc1 Rc2 29.Kb1 Rb2 30.Kc1 Qc2) 24...Qh2 25.Kf2 Rg2 (25...Rg2 26.Ke1 Re2 27.Kd1 Rd2 28.Kc1 Rc2 29.Kb1 Rb2 30.Kc1 Qc2; 25...dc5?! 26.Rg1=+; 25...bc5?! 26.Rg1=) 0–1. Abdullaevich (1935) – duyvl (1920), lichess.org, 2019.

5.e3 g6

6.c4 Bg7 7.Nf3 0–0 8.Be2 c6 9.0–0 c5 10.d4 d5 (10...cd4 11.ed4 Qc7 12.Nbd2+=) 11.Nbd2 (11.dc5 bc5 12.cd5 Qd5 13.Qd5 Nd5 14.Bg7 Kg7+=) 11...dc4 (11...Nbd7 12.cd5 Nd5 13.Nc4+=) 12.Nc4 (12.dc5 c3 13.Bc3 bc5+–) 12...cd4 13.Nd4 Nbd7 (13...Bd5 14.Rc1+=) 14.Bf3 (14.Nc6 Qe8+–) 14...Bf3 (14...Qc7 15.Bb7 Qb7 16.Nc6+–) 15.Qf3 (15.gf3?! Re8=) 15...e5 (15...Qc7 16.Nc6 Nc5 17.Bd4+–) 16.Nc6+– e4 17.Qe2 (17.Qf4!? Qe8 18.Rad1+–) 17...Qc7+– 18.Rfd1 Nc5? (18...h5 19.Nd6+–) 19.Ba3 (better 19.Be5!? Qb7 20.Nd6 Qd7 21.Ne4 Qd1 22.Qd1 Nfe4 23.Bg7 Kg7 24.Qd4 Nf6+–) 19...Nd3 (19...h5 20.Bc5 bc5 21.Rab1+–) 20.Bf8 Bf8 21.Rd3 (21.Nd2 Nc5+–) 21...ed3 22.Qd3 Bg7 (better 22...Re8+–) 23.Rd1 Ng4 24.Qd6 Qd6 25.Rd6 (25.Nd6?! Bf8+–) 25...Bf8 (25...Re8 26.Nb6 Be5 27.Rd2+–) 26.Rd4 Nf6 27.Nb6 (27.Nb6 Re8 28.Nc4+– (28.Na5?! Bc5 29.Nb3 Bb6+–)) 1–0. BeepBeepImAJeep (2700) – mufiks (2560), lichess.org, 2020.

6.c4 Bg7 7.Nf3 0–0 8.Be2 d5 9.0–0 dc4 10.Bc4 e6 11.d4 Nbd7 12.Nbd2 Qe7? (12...Rc8 13.Rc1+=) 13.Be2 (better 13.Ba3 Qd8 14.Bf8 Bf8 15.Qe2+–) 13...Rfe8 14.Ba3 Qd8 15.Rc1 Nd5 16.Nc4 Nb4 17.Nce5 (better 17.Qb3!?+–) 17...Ne5= 18.Ne5 Be5 19.de5 Qg5 The mate threat is Qxg2 20.Bf3 Bf3 (20...Red8 21.Bb7 Rd1 22.Rcd1=+) 21.Qf3 Qe5 22.Rc4 Rad8 23.h3 (23.Bb4 ab4 24.Rfc1 Re7 25.Rb4 Red7=) 23...Rd3 (23...Nd5 24.e4 Nf4 25.g3=) 24.Bb4 ab4 25.Rb4 Red8 26.Rc4 Ra3 27.Qc6 Attacking the backward pawn on c7 27...Qd6 (27...Ra1 A) 28.Qc7?? Rf1 29.Kf1 Qa1 30.Rc1 Rd1 31.Ke2 Rc1 (worse 31...Qc1 32.Qb6 Qd2 33.Kf3–+) 32.Qd8 Kg7–+; B) 28.g3+=) 28.Qc7 (better 28.Qb7!?+–) 28...Qc7= 29.Rc7 Ra4 30.Rb7 Rd6 31.Rb1 (31.Rc1 Ra2+=) 31...Ra5 (31...Ra2 32.e4=) 32.g3 Kg7 33.Kg2 Kf6 34.h4 Rd2 (34...h6 35.g4=) 35.Rb6 (35.Rb4!? Rd6 36.Rf4 Ke5 37.Rbf7 Rb5 38.Rg4+–) 35...Raa2+= 36.Rf1 Rab2 37.Rb7 Rb3 38.Rc1 Rdb2? Attacking the isolated pawn on b5 (better 38...Rbb2 39.Kf3 h5=) 39.Rcc7+– Rb5 40.Rf7 Ke5 41.Rb5 Rb5 42.Rh7 Rb2 43.h5 (43.Rh6 Kf5+–) 43...gh5 44.Rh5 The passed pawn on g3 will quickly become a dangerous weapon 44...Kf6 45.Rh4 e5 46.Kf3 Kf5 (46...Ra2 47.g4+–) 47.Rh5 Ke6 48.e4 Rb3 (48...Rb4 49.Rh6 Ke7 50.g4+–) 49.Kg4 Rb2 50.f3 (50.Rh6 Kf7 51.f4 Kg7+–) 50...Rb3 (50...Rg2 51.Rh6 Kf7 52.Kf5 Rg3 53.Rf6 Ke7 54.Ke5 Rg5 55.Rf5+–) 51.Rh6 Kf7 52.Kf5 (better 52.f4 Kg7 53.Re6 ef4 54.gf4 Kf7+–) 52...Rf3 53.Ke5 Rf1 (53...Rg3 54.Rh7 Kf8+–) 54.Rh7 Kg6 55.Rb7 Rg1 56.Ke6 Rg3 57.e5 Re3 58.Rb8 (58.Kd6 Rd3 59.Ke7 Ra3+–) 58...Rd3? (58...Kg7 59.Rd8+–) 59.Ke7 (59.Rg8 Kh5+–) 59...Kg7 60.e6 Rd2 61.Rb3 Rd1 62.Rg3 Kh6 63.Kf7 Rf1 64.Ke8 Re1 (64...Rd1+–) 65.e7 Kh7 66.Rd3 Kg7 67.Kd7 Rf1 (67...Kg6+–) 68.e8Q Rf7 (68...Rf3 69.Rf3 Kh6 70.Rg3 Kh7 71.Qh5) 69.Qf7 (69.Ke6 Rf6 70.Ke5 Rf5 71.Kf5 Kh7 72.Qe7 Kh6 73.Rh3) 69...Kf7 70.Rf3 (70.Rf3 Kg6 71.Ke6 Kg5 72.Ke5 Kg4 73.Rd3 Kg5 74.Rg3 Kh4 75.Rg6 Kh5 76.Kf6 Kh4 77.Kf5 Kh3 78.Kf4 Kh2 79.Kf3 Kh1 80.Kf2 Kh2 81.Rh6; 70.Rd6 Kg8 71.Ke7 Kg7 72.Rc6 Kg8 73.Kf6 Kh7 74.Rc8 Kh6 75.Rh8) 1–0. BeepBeepImAJeep (2770) – Psy_ko (2550), lichess.org, 2020.

6.c4 Bg7 7.Nf3 0–0 8.Be2 d6 9.0–0 Nbd7 10.d4 e5 11.de5 Ne8 12.Nc3 de5 13.Ne5?? (better 13.Qc2+=) 13...Ne5–+ 14.Qc2 Qe7 (14...Nd6 15.Rad1–+) 15.Rad1 Nd6 16.Nd5 Bd5 17.Rd5 Rad8 18.Ba3 White intends c5 18...Qe6 19.Rfd1 Rfe8 20.c5 bc5 (better 20...Nb7 21.Rd8 Rd8 22.Rd8 Nd8–/+) 21.Qc5? (better 21.Rc5 Ng4 22.Bg4 Qg4 23.h3–/+) 21...Bf6?? (better 21...Ne4 22.Rd8 Nc5 23.Bc5 Bf6–+) 22.Qc7+– Rd7 (better 22...Nb5 23.Rb5 Nc6+–) 23.Qa5?? (better 23.Qb6 Nb5 24.Qb5+– (24.Rb5?! Qa2 25.Bb2 Rd1 26.Bd1 Rd8 27.Qd8 Bd8 28.Re5 Bf6 29.Re8 Kg7 30.Bf6 Kf6=+)) 23...Ndc4–+ 24.Bc4 Nc4 25.Rd7 Na5 26.R7d6 (26.Bb4 Nb3 27.R7d6 Qg4–+) 26...Qb3 27.Rf6 (27.R1d3 Bc3 28.Bc1–+) 27…Qd1 0–1. BeepBeepImAJeep (2580) – slipslapmonster (2485), lichess.org, 2016.

6.Nf3 Bg7

7.c4 0–0 8.Be2 d6 9.0–0 Nbd7 10.d4 e5 11.de5 de5 (11...Ne4 12.Nbd2+=) 12.Ne5+– Ne5 13.Be5 Re8 14.Bb2 Qe7 15.Bf3 Ne4 (15...Rad8 16.Qe2 (16.Bb7 Rd1 17.Rd1 Ng4 18.Bg7 Kg7=) 16...Bf3 17.Qf3+=) 16.Bg7+– Kg7 17.Nc3 (17.Qd4 f6+–) 17...f5 (better 17...Nc3!? 18.Qd4 Kh6 19.Qc3 Bf3 20.gf3 f5+=) 18.Nd5+– Qe5 19.Be4 Qe4 20.f3 (20.Qc1 Rad8+–) 20...Qc4 21.Nf4 (21.Rc1!? Qd5 22.Rc7 Kg8 23.Qa1+–) 21...Rad8 (21...Re3 22.Qd7 Kh6 23.Rac1 Qf4 24.Rc7+–) 22.Qc1= Qc1 23.Rac1 Rd7 24.Kf2 Rde7 25.Rfe1 (25.Rfd1 Kf6+= (25...Re3?? 26.Rc7 R3e7 27.Rdd7 Rd7 28.Rd7 Kh6 29.Rb7+–)) 25...g5 26.Ne2 Kg6 (26...Kf6 27.Nd4=) 27.Nd4 Rd8 28.Re2 Rdd7 29.Nc6 Bc6 30.Rc6 (worse 30.bc6 Rd6=+) 30...Kf7 31.Rh6 (31.h4!? gh4 32.Rh6+=) 31...Kg7= 32.Rc6 Kf7 33.h3 Re6 34.Rc4 Rde7 35.Rec2 Attacks the backward pawn on c7 (35.h4 h6 36.hg5 hg5 37.e4+=) 35...Kf6 (better 35...Re3!? 36.Rc7 Re2 37.Kg1 Rc2 38.Rc2 h5=) 36.Rc7+– Re3 37.R7c6 (37.R2c6 R3e6 38.Re6 Ke6 39.Rc6 Kd5 40.Rb6 Kc5+–) 37...R7e6? (37...R3e6 38.f4=) 38.Re6 (better 38.Rb6! Rf3 39.Kf3 Rb6 40.Rc7+–) 38...Re6= 39.g3 f4 40.g4 Re5 41.Rc6 Re6 42.Rc7 h6 43.h4 (43.Rc4 Ke5=) 43...Kg6 (43...gh4!? 44.Rc8 h3 45.Rf8 Kg6=+) 44.h5= Kf6 45.Rh7 Ke5 46.Rf7 Rd6 47.Rf5 Kd4 48.Ke2 Rd5?? (better 48...Kc3 49.Re5 Rd2 50.Kf1 Kb3=) 49.Kd2?? (better 49.Rf6+–) 49...Rf5–+ 50.gf5 Ke5 51.f6 Kf6 52.Kd3 g4! 53.Ke4 (53.fg4 Kg5) 53...g3 54.Kd3 g2 55.Ke2 g1Q 56.Kd3 (56.Kd2 Qf2 57.Kc3 Qf3 58.Kc2 Qe2 59.Kc3 f3 60.Kb3 Qd3 61.Kb2 f2 62.Ka2 f1Q 63.Kb2 Qfb1) 56...Qe3 57.Kc4 (57.Kc2 Qf3 58.Kd2 Qe3 59.Kd1 f3 60.Kc2 f2 61.Kb2 Qd2 62.Kb3 f1Q 63.Ka3 Qfd3) 57...Qf3–+ 58.Kd4 Qe4 (58...Ke6 59.Kc4 Qg3 60.Kd4 Qe3 61.Kc4 Kf5 62.Kd5 Qc5) 59.Kc3 (59.Ke4 Kg5 60.Kf3–+) 59...f3 60.Kd2 f2 61.Kc3 f1Q 62.Kd2 (62.Kb3 Qed3 63.Kb2 Qfb1) 62...Qf2 (62...Qed3) 63.Kc1 (63.Kc1 Qfc2; 63.Kc3 Qfc2) 1–0. BeepBeepImAJeep (2595) – bigidiot (2350), lichess.org, 2017.

7.c4 0–0 8.Be2 d6 9.0–0 Nbd7 10.d4 e5 11.de5 Ne5 (11...Ne4 12.Nbd2+=) 12.Ne5+– (12.Be5?! de5 13.Qb3 Ne4=+) 12...de5 13.Be5 Qe7 14.Bd4 Nh5? (better 14...Rad8!?+–) 15.Bh5+– Bd4 16.Qd4 (better 16.ed4 gh5 17.Ra3+–) 16...Qg5? (better 16...Rad8 17.Qf4 gh5+–) 17.Bg4 Rad8 18.Qf4 Qh4 (18...Qf4 19.ef4 f5 20.Be2+–) 1–0. BeepBeepImAJeep (2570) – bigidiot (2305), lichess.org, 2017.

7.c4 0–0 8.Be2 d6 9.0–0 e5 10.d4 ed4 11.ed4 Ne4 12.Nbd2 Nd7 13.Ne4 Be4 14.Qb3 (14.Nd2 Bb7=) 14...Re8 15.Rfe1 Rc8 16.Nd2 (16.Rad1 Qf6=) 16...Ba8 (16...Bg2 17.Kg2 Qg5 18.Qg3 Qd2 19.Bc3=) 17.d5 (17.Bf3 Nf6=) 17...Nc5 18.Qc2 Qg5 19.Bg7 Kg7 20.Nf3 Qe7 21.Bf1 (21.h4 Qf6=) 21...Qf6=+ 22.h3 Re7 (22...Bb7 23.Bd3=+) 23.Re7= Qe7 24.Re1 Qf6 25.Bd3 (25.Nd2 Qf5 26.Qa2 Qf4=) 25...Rd8 26.Qe2 (26.Nd2 Bb7= (worse 26...Nd3 27.Qd3 h5 28.Qe3+–)) 26...Bb7 (better 26...Na4 27.Qd2 Nc5–/+) 27.Qe7?? (better 27.Bc2=) 27...Qe7 (better 27...Nd3 28.Qc7 Ne1 29.Ne1 Re8–+) 28.Re7 Kf6 (better 28...Nd3 29.Rc7 Bc8–+) 29.Rc7=+ Bc8 (better 29...Rc8!? 30.Rc8 Bc8–/+) 30.Bc2+= Bf5 31.Bd1 (31.Bf5 gf5 32.Nd4 f4+=) 31...h6 (31...Bd3 32.Nh2 h5 33.Nf1=) 32.Nd4 (better 32.Rc6+–) 32...Bc8? (32...Bd3 33.f4+=) 33.Nc6?? (better 33.Rc6 Bf5 34.Rb6+– (worse 34.Nf5 Kf5 35.Rb6 Ke4+–)) 33...Re8+= 34.Bc2 Bf5 35.Bf5 Re1 (35...gf5 36.f3+=) 36.Kh2+– gf5 37.Rc8 Ne4 (better 37...Nd3 38.f3 Nb2+–) 38.Rb8 (better 38.f3!? Nd2 39.Kg3 f4 40.Kf4 Nc4 41.Na7+–) 38...Nf2= 39.Rb6 (39.g3 Ne4 40.Rb6 Re2 41.Kg1 Re3=+) 39...Rh1 (39...f4 40.g4 Re2–/+) 40.Kg3= Ne4 41.Kh4 (41.Kf4 Rf1 42.Ke3 Re1 43.Kd3 Rd1 44.Ke2 Rd2 45.Ke3 Rg2 46.Na5 Rh2=) 41...Rh2= 42.Na5?? (better 42.Rb7=) 42...Kg6 (42...Rg2 43.Nc6 Rf2–+) 43.g3 (better 43.Nb7 Rg2 44.Nd6+–) 43...f6 (43...Ng5 44.Rd6 Kg7 45.Rg6 fg6 46.b6 Rh3) 44.Nb7 (44.g4 f4 45.Rb8 Ng5 46.Rg8 Kh7 47.Rh8 Kh8 48.Kh5 Kg7 49.h4 Nf3 50.b6 Rh4) 44...Nf2 45.g4 (45.Nd6 Rh3) 45…Rh3 0–1. retiponziani (1775) – Salvatore (1755), ChessWorld.net, 2014.

7.c4 0–0 8.e4 Qc8 (8...Ne4 9.Bg7 Kg7 10.d4–/+) 9.Ke2 (9.e5 Nh5=) 9...Nh5 (9...Be4 10.Ke1–/+) 10.Qc1 (10.Bg7 Kg7 11.Qc2 h6=) 10...Rd8 (10...Be4 11.Bg7 Bf3 12.Kf3 Qb7 13.Ke2 Ng7 14.Qe1–/+) 11.Ke1? (better 11.Bg7 Ng7 12.Nc3=) 11...Bd4?? (11...Bb2 12.Qb2 Be4 13.Ra3–/+) 12.Na3?? (better 12.Nd4 Be4 13.d3+–) 12...Na6?? (12...Bb2 13.Qb2 Be4 14.Ng5–/+) 13.e5 (better 13.ba6!? Bb2 14.ab7 Qb7 15.Qb2 Qe4 16.Kd1 Rac8+–) 13...Be4?? (better 13...Bb2 14.Qb2 Bf3 15.gf3 Nb4–/+) 14.Qc2?? (better 14.Bd4 Bf3 15.gf3+–) 14...f6 (14...Bc2 15.Nd4 Ba4 16.ba6 Qa6 17.Nb1–+) 15.e6?? (15.Qe4!? Bb2 16.Ra2 Ba3 17.Ra3=) 15...Ra7 (better 15...Bc2 16.Nd4 Ba4 17.ba6 c5–+) 16.Nh4?? (better 16.Qe4 Bb2 17.Ra2=+) 16...Bf3 (better 16...Bc2 17.Bd4 Nb4–+) 17.Be2 (better 17.Bd4 Nb4 18.Qb1 Ba8+–) 17...Qa8?? (better 17...Nb4 18.Qb1 Bb2 19.Nf3 Ba1 20.Qa1 Nf4–+) 18.Qf5 (better 18.Bf3 Nb4 19.Qb1 (19.Ba8?! Nc2 20.Nc2 Bb2+–; 19.Bd4?! Nc2 20.Nc2 Qc8+–) 19...Bb2 20.Ba8 (worse 20.Qb2 Nd3 21.Kf1 Nb2 22.Ba8 Raa8–/+) 20...Raa8 21.Ng6 (21.Qb2 Nd3 22.Kd1 Nb2 23.Kc2 Na4=+) 21...hg6 22.Qg6 Ng7 23.Rb1 de6 24.Nc2 (24.Rb2?! Nd3 25.Kf1 Nb2+–) 24...Nd3 25.Kf1+–) 18…Bf2?? (18...Bf2 19.Kf2 gf5 20.Bf3 Qb8 21.Bh5 Nc5–/+; better 18...Be4 19.Qh5 Bb2–+) 0–1. retiponziani (1775) – Salvatore (1755), ChessWorld.net, 2014.

7.c4 d6 8.Be2 Nbd7 9.0–0 0–0 10.d4 Re8 11.d5 Nc5 12.Nd4 e6 13.Nc6 Qd7 14.Bf6 (14.Nc3 Rac8=) 14...Bf6 15.Ra2 Bc6 16.dc6 Qe7 17.Qc2 Kg7 18.Nd2 h5 19.Nf3 Rh8 20.h3 g5 21.Nh2 Be5 22.f4 (22.Bd3 Qf6=) 22...gf4 23.ef4 Bd4 24.Kh1 Rag8 (24...Qh4 25.Ra3=) 25.Bf3 (25.Nf3 Bf6=) 25...Kf8 (25...Qh4 26.Qd2 Bf6 27.Re1=+) 26.Re1 (26.f5!?=) 26...Qf6=+ 27.Qd2?? (27.f5 Qf5 28.Qf5 ef5=+) 27...Rg3?? (better 27...Bc3!? 28.Qe3 Be1 29.Qe1 Qf4 30.Qe2–+) 28.Nf1? (28.Rd1 Bc3 29.Qe3 Ke8=+) 28...Rg7 (better 28...Bc3 29.Qe2 Be1 30.Qe1 Rg7–+) 29.Ra3 e5 (29...Rhg8!?=+) 30.fe5= de5 31.Qe2 Qh4 (31...Rhg8 32.Nd2= (32.Bh5?? Rg2 33.Rf3 Re2 34.Re2 Rg1 35.Kh2 Qg5–+)) 32.Ne3 Rg3 33.Kh2 (33.Qf1 Qg5 34.Nc2 Qf4=) 33...e4 (33...Rhg8!? 34.Nf5 Qf4 35.Ng3 Qg3 36.Kh1 e4 37.Be4 Qa3–/+) 34.Nf5+= Rh3 35.gh3 Qf4? (better 35...Be5!? 36.Kg2 Rg8 37.Bg4 Qg5+=) 36.Kh1+– Qf5 37.Be4 Qh3?? (better 37...Qf2+–) 38.Qh2 (better 38.Rh3 Rh6 39.Qd2+–) 38…Qa3–+ (38...Qa3 39.Bd5 Qc3–+) 0–1. Abdullaevich (1860) – Zakamsk (1980), lichess.org, 2020.

7.d4 0–0 8.Nbd2 d6 9.c4 Nbd7 10.h3 Re8 (10...e5 11.de5 Ne8 12.Qc2 de5 13.Be2=) 11.Be2 e5 12.d5 (12.0–0 Qe7=) 12...Qe7 (12...Nc5 13.0–0=) 13.0–0 Nc5 14.Ne1 Nfd7 15.Qc1 f5 16.Nd3 Qf7 (16...Bc8 17.Qc2=) 17.Nc5 Nc5 18.Qc2 Nd7 (18...Re7 19.Rae1=) 19.Nb3 (19.Rae1 Nc5=) 19...h6 (19...Nf6 20.Rae1=) 20.f3 (20.Rae1 Rf8+=) 20...g5 Black intends f4 (20...Nf6 21.Rae1=) 21.e4 (21.Rae1 Re7=) 21...f4= 22.Bd3 h5 (22...Bc8 23.Rad1=) 23.Kf2 (23.Rad1 Qg6+=) 23...Bc8 24.Ke2 Nf6 25.Kd2 g4 (25...Qg6 26.Ke1=) 26.hg4+= hg4 27.Rh1 g3 (27...Qe7 28.Rad1+=) 28.Rag1 (28.Rh4 Nd7+=) 28...Qg6 (28...Nd7 29.Rd1+=) 29.Qd1 (29.Kd1 Qg5=) 29...Kf7 30.Qe2 (30.Ke1 Rh8=) 30...Bd7 (30...Ke7 31.Rh4=) 31.Rh4 (31.Rc1 Ke7=) 31...Ke7 32.Rgh1 Rh8 33.c5 (33.Rh8 Rh8 34.Rh8 Bh8=) 33...dc5 (better 33...Rh4 34.cd6 cd6 35.Rh4 Rc8=) 34.Be5?? (better 34.Rh8 Rh8 35.Rh8 Bh8 36.Be5=) 34...Rh4–/+ 35.Rh4 Qg5 36.Bf4? (better 36.Bc7 Qh4 37.Bb6–/+) 36...Qh4–+ 37.Bc7 Rc8?? (better 37...Ne8 38.Bb6 Qh6 39.Qe3 Qb6–+) 38.e5?? (better 38.Bb6 Nh5 39.Bc5 (39.Nc5?? Bd4–+) 39...Ke8 40.Bc4–/+) 38...Nd5 (38...Rc7 39.d6 Kf8 40.ef6 Qb4 41.Kc1 Bf6 42.dc7 Qb3 43.Qc2 Qc2 44.Bc2–+) 39.Bd6 Kf7 (39...Ke8 40.Be4 Nf4 41.Qc4–+) 40.Bc4?? (40.e6 Be6 41.Bg6 Kg6 42.Qe6 Qf6 43.Qd5–+) 40...Be6 41.Kc2 (41.Kc1–+) 41...Nb4 (41...Qc4 42.Qc4 Ne3 43.Kd3 Nc4 44.Nc1–+) 42.Kb2 (42.Kc3 Na2! 43.Kb2 Bc4–+) 42...Qc4 43.Qd1 (43.Qc4 Bc4 44.Nd2 Bd5–+) 43...Qb3 (43...Rd8 44.Ka3 Nc2 45.Kb2 Be5 46.Kb1 Qb3 47.Kc1 Qa3 48.Kd2 Rd6 49.Ke2 Qe3 50.Kf1 Rd1) 44.Qb3 Bb3 45.Kb3 c4 46.Kc3 Ke6 (46...Ke6 47.Be7 Be5 48.Kd2 c3 49.Ke2 Ke7 50.Kd1 c2 51.Ke2 c1Q 52.f4 Rc2 53.Kf3 Qf4) 0–1. TwelveTeen (2485) – penguingim1, lichess.org, 2018.

7.Be2 0–0 8.0–0 d5 9.d4 Nbd7 10.Nbd2 c6 11.c4 dc4 12.Nc4 cb5 13.ab5 The passed pawn on a5 will become decisive later 13...Rc8 14.Nfe5 Ne5 15.Ne5 Nd7 16.Bf3 Bf3 17.Qf3 (17.Nf3 Qc7+=) 17...Ne5=+ 18.de5 Qc7 (18...Rc5=+) 19.Bd4 (better 19.Rfc1 Qb8 20.Qe4=) 19...Be5–/+ 20.Be5 Qe5 21.Rab1 Rc2 22.Qb7 Qc5 23.Rfd1 Rc8 24.h3 Kg7 25.Rd7 Qf5 26.Rf1 Qb5 (26...R8c5 27.Rd8 Rc1 28.Qe7 Rf1 29.Kf1 Qb1 30.Ke2 Qb5 31.Kf3 Rf5 32.Kg4–+) 27.Re7 Do you see the mate threat? 27...Qf5 28.Qb6 a4 (28...h6 29.Qd4 Qf6 30.Ra1=+) 29.Qd4 (29.Ra7 Qe4=) 29...Qf6=+ 30.Qf6 Kf6 31.Ra7 Ra2 32.Rd1 Rcc2 (32...Kg7!?=+) 33.Rdd7= Kg5? (better 33...Ke5 34.Rf7 a3=) 34.Rf7+– Threatening mate: Ra5 34...a3?? (34...Rc5 35.f4 Kh4+–) 35.Rf4 (35.Ra5 Rc5 36.Rc5 Kh6 37.g4 Ra1 38.Kg2 Rg1 39.Kg1 a2 40.g5 Kh5 41.Rh7) 35...h5 (35...Rc1 36.Kh2 Kh6+–) 36.h4 Kh6 37.Rff7 g5 (37...Rc1 38.Kh2 Rh1 39.Kh1 Ra1 40.Kh2 Rh1 41.Kh1 a2 42.Rh7) 38.Rf6 1–0. BeepBeepImAJeep (2740) – AGM_danya (2505), lichess.org, 2020.

7.Be2 0–0 8.0–0 d6 9.c4 e5 10.h3 Nbd7 11.d3 (11.d4 A) 11...ed4 12.ed4 (12.Nd4 Ne4 13.Nd2 Ndc5 14.Ne4 Be4 15.Bf3 Qh4 16.Be4) 12...Ne4 13.Nbd2 Qf6 14.Ne4 Be4 15.Qd2 Rae8 16.Ra2; B) 11...Ne4 12.Nbd2 (12.Nc3 Re8 13.Ne4 Be4 14.Qd2 Qf6 15.Rfe1 Qf5 16.Rac1) 12...Nd2 13.Nd2 Qh4 14.Bf3 e4 15.Be2 Nc5 16.Qc2; C) 11...Re8= 12.Nbd2 (12.Nc3 ed4 13.ed4 Ne4 14.Ne4 Re4 15.Re1 Nc5 16.Qc2) 12...ed4 13.Nd4 Nc5 14.Nc6 Bc6 15.bc6 Nfe4 16.Bg7; 11.Nc3 A) 11...Re8 12.d4 (12.Re1 e4 13.Nd4 Nc5 14.f4 Qd7 15.Qc2 Ne6 16.Ne6) 12...Ne4 13.Ne4 Be4 14.Nd2 Bb7 15.Re1 Qh4 16.Nf3; B) 11...e4 12.Nd4 Nc5 13.f4 Re8 14.Qe1 Ne6 15.Nc6 Qd7 16.f5; C) 11...Nc5 12.d4 (12.Qc2 Re8 13.d4 ed4 14.ed4 Nce4 15.Rfe1 Nc3 16.Bc3) 12...ed4 13.ed4 Nce4 14.Nd2 Re8 15.Re1 Ng5 16.h4; 11.Qc2 A) 11...Re8 12.Nc3 (12.Re1 Nc5 13.Nc3 e4 14.Nd4 Qd7 15.Rf1 d5 16.cd5) 12...Nc5 13.Rfe1 e4 14.Nd4 Qd7 15.Rf1 d5 16.Nd5; B) 11...Qe7 12.Re1 (12.Nc3 Nc5 13.d4 Nce4 14.d5 Nc5 15.Nd2 e4 16.Rad1) 12...Rfe8 13.Nc3 e4 14.Nd4 Nc5 15.Nc6 Qe6 16.Rf1; C) 11...Nc5 12.Nc3 (12.d4 ed4 13.ed4 Be4 14.Qd1 Ne6 15.Qd2 d5 16.Ne5) 12...Qd7 13.d3 e4 14.Ne4 Nfe4 15.Bg7 Kg7 16.de4; 11.Re1 A) 11...e4 12.Nd4 Nc5 13.Nc3 Qd7 14.Qc2 Rfe8 15.Rf1 d5 16.cd5; B) 11...Nc5 12.d4 (12.Nc3 e4 13.Nd4 Qd7 14.Qc2 Rfe8 15.Rf1 d5 16.cd5) 12...ed4 13.ed4 Ne6 14.Nc3 Nf4 15.d5 Re8 16.Qc1; C) 11...Re8 12.Nc3 (12.Qc2 Nc5 13.Nc3 e4 14.Nd4 Qd7 15.Rf1 d5 16.cd5) 12...e4 13.Nd4 Nc5 14.Qc2 Qd7 15.Rf1 d5 16.Nd5) 11...h6 (11...e4 12.de4 (12.Nd4 ed3 13.Bd3 Nc5 14.Nc3 Qd7 15.Bc2 Rfe8 16.Qd2) 12...Ne4 13.Bg7 (13.Bd4 Re8 14.Ra3 Ndc5 15.Nbd2 Qe7 16.Qc2) 13...Kg7 14.Qd4 Qf6 15.Qf6 (15.Rc1 Ndc5 16.Qf6) 15...Ndf6 (15...Kf6 16.Rc1) 16.Nbd2=+ –0.62/9 (16.Rd1=); 11...Nc5 12.e4 (12.Nc3 e4 13.Nd4 ed3 14.Bd3 Qd7 15.f3 Bh6 16.Re1) 12...Qd7 13.Qc2 Rfe8 14.Nc3 Ne6 15.Nd5 Nd5 16.cd5; 11...Qe7 12.Nc3 (12.Nbd2 Nc5 13.Nb3 Nd3 14.Bd3 e4 15.Nbd4 ed3 16.Qd3) 12...Nc5 13.Qc2 e4 14.de4 Be4 15.Ne4 Nfe4 16.Nd4) 12.Nc3 (12.Nbd2 Nc5 13.Nb3 Nfd7 14.Re1 e4 15.Nc5 dc5 16.Bg7) 12...Nh7 (12...Rc8 13.Rc1= (13.Qc2 Re8 14.d4 Qe7 15.Nd2 Ra8 16.Rfe1) 13...Nc5 14.d4 ed4 15.ed4 Nce4 16.Re1; 12...Nc5 13.Qc2 Re8 14.Nd2 Qd7 15.Nde4 Nfe4 16.de4) 13.d4 (13.Rc1 f5= (13...Nhf6 14.d4 Re8 15.Qc2 e4 16.Nd2) 14.d4 Ng5 15.Nd5 Ne6 16.de5) 13...e4 (13...Ng5 14.Nd5+= Nf6 15.Ng5 hg5 16.de5) 14.Nd2+= f5 (14...Nhf6 15.f3 ef3 16.Bf3) 15.Qb3 Kh8 16.Nd5 Nhf6 17.Nf4 Qe8 18.c5 (18.Rac1 Rd8+=) 18...dc5 (18...bc5 19.Rac1=) 19.Bc4+– cd4 20.Bd4 (20.ed4 Rc8+–) 20...Nc5 (20...Rc8!?+=) 21.Bc5+– bc5 22.Ne6 Qe7 23.Nf8 Bf8 (23...Rf8 24.Rac1+–) 24.Rfd1 Qe5 (24...Bg7 25.Rac1+–) 25.Be2 (25.Nf1 Bd6+–) 25...Bd6+– 26.g3 Bd5 27.Nc4 White plans b6 27...Bc4 (27...Qe6 28.Qc3 Bf8 29.Na5+–) 28.Bc4 Nh5 Black prepares the advance f4 (28...g5 29.Rac1+–) 29.b6 (better 29.Rab1+–) 29...Ng3 30.b7 (30.fg3?! Qg3 31.Kf1 Qh3 32.Ke1 Rd8 33.Rd6 cd6=) 30...Rb8 31.Kg2 Nh5 32.Rg1 f4 (32...Qh2 33.Kf1 Kg7 34.Qc3 Be5 35.Qd2 Qh3 36.Ke1=) 33.Rab1 f3 (33...fe3!? 34.Qe3 Nf4 35.Kf1 Kg7=) 34.Kf1+= g5 35.Qb2 (35.Qc2 Nf6+=) 35...Nf6 (35...Qb2 36.Rb2 Kg7 37.Ke1+=) 36.Qe5 (36.Qd2 Qh2+=) 36...Be5= 37.Ke1 (37.Rb3 c6=) 37...Kg7 (better 37...Bc3!? 38.Kd1 Bb4=) 38.Kd2+– Kf8 39.Kc2 (39.Rgc1 Ke7+=) 39...Ke7= 40.Rgd1 Bd6 41.Rb5 (better 41.Rd2=) 41...Nd7 (better 41...g4 42.hg4 Ng4=) 42.Bd5+– Nb6? (better 42...Ne5 43.Be4 c6+–) 43.Be4+– Na4 (43...Nc4 44.Kc3 c6 45.Bc6+– (worse 45.Kc4 cb5 46.Kb5 Rd8+–)) 44.Ra5 Nb6 45.Ra8 (45.Ra8 c6 46.Rb8 Bb8 47.Bf3+–) 1–0. Janek – Bbg, internet free game, 2017.

7.Be2 0–0 8.0–0 d6 9.d4 Nbd7 10.c4 Re8 11.Nc3 e5 12.Rc1 ed4 13.Nd4 (13.ed4 Re7=) 13...Ne4 14.Ne4 Be4 15.Bf3 Nc5 16.Be4 Ne4 17.Nc6 Qg5 18.Bg7 Kg7 19.Qd4 Nf6 (19...Qf6 20.Qf6 Kf6 21.Rfd1=) 20.Rcd1 Re4 21.Qc3 Rae8 22.Rd5 (22.Rd4 Rd4 23.ed4 Re2=) 22...Qh6 (22...Rc4 23.Qc4 (worse 23.Rg5 Rc3 24.Ra1 h6–+) 23...Qd5 24.Qc3=) 23.h3 R8e6 24.Rd4 Kg8 25.Rfd1 g5 26.Re4 Ne4 27.Qd4 (27.Qc2 Qg6+=) 27...g4 (27...Qh4 28.f3 Qf2 29.Kh2 Qg3 30.Kg1 Nf2–/+) 28.hg4–/+ Qh4 Do you see the mate threat? 29.g3 Qg4?? (29...Ng3 30.Qd5 Ne4–+) 30.Kg2?? (better 30.Rf1=+) 30...Rf6–+ 31.Ne7 Kg7 (better 31...Kf8 32.Qf6 Nf6–+) 32.Nd5 (32.Rf1 Qf3 33.Kh2–+) 32...Qf3 33.Kh3 Qh5 (33...Qf5 34.Kh4 Qf2 35.Qf6 Nf6 36.Nf6 Qf6 37.Kh3 Qf5 38.Kh4 h5–+) 34.Kg2= Qf3 35.Kh2?? (better 35.Kh3=) 35...Qf2 36.Kh3 (36.Kh3 Qg3; 36.Kh1 Ng3). BeepBeepImAJeep (2740) – bigmile (1965), lichess.org, 2016.

7.Be2 0–0 8.0–0 d6 9.d4 Nbd7 10.c4 Re8 11.Nc3 e5 12.de5 Ne5 13.Nd4 Nfd7? (13...Qe7 14.Qb3=) 14.h3?? (better 14.f4+–) 14...Nc5= 15.Rc1 (15.Nd5 Rc8=) 15...Qf6 (15...Qg5 16.Nf3 Bf3 17.Bf3 Nf3 18.Qf3=+) 16.Nd5= White gets in control 16...Bd5 (16...Qd8 17.Qc2=) 17.cd5+= Rad8 18.Nc6 Qh4? (18...Ra8!?+–) 19.Be5 (19.Nd8 Rd8 20.Ba1 Rc8+–) 19...Be5 (19...de5 20.Nd8 Rd8 21.Bc4+–) 20.Nd8 Rd8 (20...Qd8 21.Qc2+–) 21.Rc4 Qh6 22.f4 Bf6 23.e4 Re8 24.Qc2 Qg7 25.Rd1 (25.Kh1 Qf8+–) 25...g5 (better 25...Qh6!?+–) 26.fg5+– Qg5 27.Rf1?? (27.Bd3 Be5+–) 27...Be5?? (better 27...Bd4! 28.Kh1 Ne4+=) 28.Rf3 Kh8 29.Qc1 (29.Bd1 Bg3+–) 29...Qg7 (better 29...Qc1!? 30.Rc1 Bd4 31.Kf1 Ne4+–) 30.Qe3+– Rg8 Threatening mate... how? 31.Qf2 f6 32.Rf5 Qg6 33.Bg4 h6 34.Rh5 Qg7? (better 34...Ne4 35.Qe3 Ng5 36.Rc7 f5+–) 35.Qe3 Qe7 (35...Qf8 36.Rh6 Kg7+–) 1–0. BeepBeepImAJeep (2635) – LoneRider (2760), lichess.org, 2019.

3.a4 c5

4.Bb2 d5 5.e3 e6 6.Nf3 Nf6 7.g3 (7.Be2 Nbd7=) 7...h6 (7...Bd6 8.Bg2+=) 8.Bg2= Be7 9.0–0 0–0 10.d4 (10.d3 Bb7=) 10...c4 (10...Bb7 11.dc5 Bc5 12.c4=) 11.Ne5 Qe8 (better is 11...Ra7!?=) 12.Nc4!+/– Ne4? (12...dc4 13.Ba8 Pinning (13.Ba8 Deflection)) 13.Nb6+– Ra7 14.Nc8 (14.c4 Bb7+–) 14...Qc8 15.Qd3 (15.Be4 de4 16.Nd2 Rc7+–) 15...Nd7 (15...Nd6 16.Nd2+–) 16.Be4 (16.c4 Rc7 17.c5 Bf6+–) 16...de4 17.Qe4 f5 (17...Nf6 18.Qd3 Rc7+–) 18.Qe6 Rf7 19.Nc3 (better is 19.c4 Qd8+–) 19...Rc7 (19...Bb4 20.Nd5 Qc2+–) 20.Nd5 Rc2 (20...Bf6 21.Nc7 Qc7+–) 21.Ne7 (21.Ne7 Kf8 22.Nc8 Rc8 23.Ba3 Kg8 24.Rac1+–) 1–0. bridlingtonbrummie – MissLayla, ChessWorld.net, 2009.

4.Bb2 d5 5.g3 Nf6 6.Bg2 Bb7 7.Nf3 Nbd7 8.0–0 e6 9.d3 Bd6 (9...Be7 10.Nbd2=) 10.Nbd2 (10.e4 Qc7+=) 10...Qe7 (10...Qc7 11.e4=) 11.Re1 e5 12.e4 d4 13.Nc4 0–0 14.Bc1 Bc7 15.Bg5 h6 16.Bf6 (16.Bd2!?+=) 16...Nf6= 17.Nh4 (17.Qd2 Qe6=) 17...g6 18.Bh3 Bc8 (18...Nh7 19.Nf3=+) 19.Bc8= Rac8 20.Rf1 Qe6 21.Qf3 (21.Qe2 Kg7=) 21...Nh7 (21...Ne8 22.Qe2=+) 22.Qg2 Ng5 23.Kh1 Qe7 (23...Qg4 24.Rab1=) 24.Rae1 (better 24.f4!? Nh7 25.fe5+–) 24...Ne6= 25.Qh3 Kh7 26.Nf3 Kg7 27.Nh4 (27.Qh4 Qh4 28.Nh4 Rh8=) 27...Rh8 28.Qg4 Qg5 29.Qh3 Qf6 30.Qg2 Qg5 (30...Ra8 31.Qf3=) 31.Nf3+= ½–½. Onna Amargant,Josep (1950) – Velasco Blasco,J M (2115), Championship CAT, 2014.

4.Bb2 Nf6 5.c4 e6 6.e4 Ne4–/+ 7.g3 (7.Qe2 Bb7–/+) 7...d5 8.d3 Nf6 9.Bg2 Bb7 10.Ne2 Bd6 11.0–0 Nbd7 12.Qd2 (12.Re1 0–0–/+) 12...Qc7 13.Qg5 (13.cd5 Bd5 14.Bd5 ed5 (14...Nd5?! 15.Bg7 Rg8 16.Bb2=+) 15.Qe3 Be7 16.Bf6 Nf6–/+ (16...gf6?! 17.d4=)) 13...0–0–+ 14.Rd1 (14.cd5 Bd5 15.Nbc3 Bg2 16.Kg2 Rad8–+) 14...d4 15.Qd2 (15.Bb7 Qb7 16.Nd2 Ne5–+) 15...e5 (15...Bg2 16.Kg2 Qb7 17.Kh3–+) 16.h3 Bg2 17.Kg2 e4 18.de4 Ne4 19.Qd3 Ndf6 (19...Rfe8 20.Bc1–+) 20.Bc1 Rae8 21.Rf1 Nh5 22.Qf3 g6 (22...Re5 23.Re1–+) 23.Bh6–/+ Ng7 24.Ra2 f5 25.Bf4 (25.Re1 Kh8–+) 25...Nh5 26.Bd6 Qd6 27.Rd1 (27.Rb2 Qe6 28.Qb3 Nd6–+) 27...f4 28.g4 (28.gf4 Nf4 29.Nf4 Rf4 30.Qe2 Rf2 31.Qf2 Nf2 32.Rf2–+) 28...Nhg3 (28...Ng5 29.Qd5 Qd5 30.cd5 f3 31.Kg1 fe2 32.Re2 Re2–+) 29.Ng1 (29.fg3 fg3 30.Qb3 Rf2 31.Kg1 Ng5 32.Ng3 Ra2–+) 29...g5 (better 29...Ng5!? 30.Qd5 Qd5 31.cd5 N3e4–+) 30.Rd3 (30.fg3 fg3 31.Qb3 Qf4–+) 30...Kg7 (30...Qe6 A) 31.fg3 Qc4 (31...Ng3?! 32.Nd2=) 32.Rb2 Qc1–+ (32...Qa4?! 33.Ra3 Qc4 34.gf4–/+; 32...fg3?! 33.Qd1–+; 32...Ng3?! 33.Na3 Qf7 34.Rc2=+); B) 31.Na3–/+) 31.Rc2= (31.fg3 fg3 32.Qd1 Nf2–+) 31...h5 32.fg3? (better 32.Qd1=+) 32...fg3–+ 33.Qd1 Rf2 (33...Nf2 34.Qd2 Nd3 35.Qd3–+) 34.Rf2–/+ gf2 (34...Nf2 35.Qf3 Nd3 36.Qd3–+) 35.Ne2 Rf8 (35...hg4 36.hg4 Rh8–+) 36.Qf1–+ hg4 37.hg4 Qe6 38.Nd2 (38.Rg3–+) 38...Qg4 (38...Nd2 39.Qf2 Qe4 40.Rf3 Rf3 41.Qd4 cd4 42.Ng3 Qg4 43.Kh1 Qg3 44.c5 Rf1) 39.Rg3 Ng3 (better 39...Qf5 40.Rf3 Nd2 41.Rf5 Rf5–+) 40.Ng3 Qf4?? (better 40...Rf4–+) 41.Nge4 (better 41.Nh5 Kg6 42.Nf4 Rf4 43.Qe2+–) 41...Qe3 42.Kh1 (42.Nf2 Qd2 43.Qg1 Qe2–+) 42...g4 (42...Rf4 43.Qf2 Rf2 44.Nf2 Qf2 45.Ne4 Qe1 46.Kg2 Qe4 47.Kf2 d3 48.Kg3 d2 49.Kh2 Qf4 50.Kg2 d1Q 51.Kh3 Qdf3) 43.Qg2 (43.Kh2 Rh8 44.Kg2 Qh3 45.Kf2 Rf8 46.Kg1 Rf1 47.Nf1–+) 43…Rh8 (43...Rh8 44.Qh2 Qe4 45.Ne4 f1Q) 0–1. petrobbo (2040) – Arpad_der_Zigeuner (2100), ChessWorld.net, 2013.

4.c4 d6 5.d4 e5 6.d5 f6 7.e4 g5 (7...f5+=) 8.f4 (8.Be2 Ne7+/–) 8...h6 (better is 8...ef4!? 9.Bd3 Bg7=) 9.f5+/– Ke7 10.g4 Bg7 11.h3 Rh7 12.h4 Bh8 (12...Ke8 13.Nf3 Rh8 14.Nc3+/–) 13.h5 (better is 13.hg5!? fg5 14.Bg5 Bf6 15.Be3+–) 13...Nd7 14.Bf4?? (14.Nf3 Kf8+/–) 14...Qf8?? (better is 14...ef4 15.Nd2 Ne5–+) 15.Bh2 Qf7 16.Bh3 Bb7 17.Kf2 Rb8 18.Nf3 Kf8 19.Nh4?? (19.Bg2 Ne7+=) 19...Ke8?? (better is 19...gh4 20.Bg1 Ne7–+) 20.Ng6+= Rd8 21.Ne7?? (21.Bg2 Bg7+=) 21...Ra8?? (better is 21...Qe7 22.Kg1 Kf8–+) 22.Nc6 Bc8 23.Nd4?? (23.Kg1 Bg7+/–) 23...Nb8?? (better is 23...cd4 24.Bg2 Kf8–+) 24.Nf3 Bg7 25.Ng1 Bf8 26.Bf1 Rh8 27.Bf4?? (27.Nf3 Qe7+/–) 27...Qe7?? (better is 27...gf4 28.Nf3 Kd8–+) 28.Bc1+/– Qc7 29.Ke1 Qd8 ½–½. Limbourg,Philipp – Wuebbeke,Christoph, Ruhrgebiet–ch U17, 1997. (=1.a4 a5 2.b4 b6 3.b5 c5)

4.bc6 dc6= 5.g3 Bb7 6.Bg2 Qc7 7.e3 c5 8.Ne2?? (better is 8.Nf3=) 8…Bg2–+ (8...Bg2 9.Rg1 Bc6–+) 0–1. diablo005 – castel100, kurnik, 2012.

4.e3 Bb7 5.Nf3 h5 6.Bb2 h4 7.Ng5 (better 7.Be2+=) 7...f6?? (7...e5 8.Nh3 d6 9.f3=) 8.Nh3?? (better 8.Bd3 Qc7 9.Bg6 Kd8 10.Nf7 Kc8 11.Nh8 Bg2 12.Rg1 Qh2 13.Ke2+–) 8...e5 9.Qg4 (9.f4 ef4 10.Nf4 Bd6+=) 9...Ne7 (9...g5 10.f4 Nh6 11.Qe2=) 10.Be2 (10.d4 cd4 11.ed4 d6+=) 10...f5 (10...Rh6!?=) 11.Qg5+= d6 12.0–0 Nd7? (better 12...Rh6+–) 13.Bh5+– Rh5 14.Qh5 g6 15.Qh4 Bg7 16.Ng5 Nf8 (16...Nd5 17.Nc3+–) 17.c4 Qd7 18.Nc3 (18.d4 Bf6 19.d5 Ng8+–) 18...Bf6 19.f4 0–0–0 20.Nd5! Bd5 (20...Bd5 21.cd5 Combination; 20...Nd5 21.cd5 Combination) 21.cd5 Nd5 22.e4 (22.Ra3 Qe7+–) 22...Ne7 (22...Nf4 23.Rf4 Bg5 24.Qg5 ef4 25.Qf4 fe4 26.Qe4=) 23.fe5 (better 23.Qh6!?+–) 23...de5= 24.Rad1 (better 24.ef5 gf5 25.Qh6+=) 24...Ne6–/+ 25.Nf7?? (better 25.Be5 Be5 26.Nf3–/+) 25...Bh4–+ 26.Nd8 Nd8 27.Be5 (27.ef5 Nf5 28.Be5 Qd3–+) 27...Qe6 (better 27...fe4 28.Bg7–+) 28.Bf4 (28.Bc3 Qe4 29.g3 Bg5–+) 28...Qe4 29.d3 (29.Ra1 Nd5 30.Be3 Ne6–+) 29...Qd4 30.Kh1 Nd5 31.Bd6 (31.Bd2 Qa4 32.Rc1 Qb5–+) 31...Ne3 32.Rf4 Qd6 33.Rdf1 Qd5 (33...Qd5 34.Rg1 g5–+) 0–1. Akrapovik (1695) – Maulana30 (1750), lichess.org, 2021.

4.e3 d5 5.c4 e6 6.Qb3 Be7 7.Bb2 Bf6 8.Bf6 Nf6 (worse 8...gf6 9.cd5 ed5 10.Nf3+–) 9.Nc3 d4 10.Nb1 (10.Nce2 e5=+) 10...e5–/+ 11.Bd3 e4 12.Bf1 0–0 Black prepares d3 13.f3 Bb7 14.f4 d3 (14...Bc8 15.Ne2–/+) 15.g3 Re8 16.Na3 Nbd7 17.Nb1 Qe7 18.Nh3 Ng4 19.Ng5 f5 20.h3 (20.Bg2!?–/+) 20...Ngf6 21.Bg2? (better 21.h4!?–/+) 21...h6–+ 22.Nf3?? (22.h4 Nh5 23.g4 fg4 24.Nc3–+) 22...ef3 23.Bf3 Bf3 24.Qd3 (24.Rg1 Rad8 25.Nc3–+) 24...Bh1 25.Kf2 Be4 (25...Ne4 26.Kg1 Ng3 27.e4–+) 26.Qe2 Rad8 (26...Bb1 27.Rb1 Ne4 28.Kg1 Ng3 29.Qg2–+) 27.Nc3 Bb7 (better 27...Qd6 28.Qd1–+) 28.Nd5 Nd5 29.cd5 Bd5 30.e4 Be4 31.d3 Nf6 32.de4 Ne4 (32...Rd2 33.Ra2 Re2 34.Re2 Ne4 35.Kg2–+) 33.Kg2 Rd2 34.Qd2 Nd2 35.Rd1 (35.h4 Qe2 36.Kh3 Nf1 37.Ra2 Qa2 38.g4 Re3) 35...Qe2 36.Kg1 Nf3 (36...Nf3 37.Kh1 Qh2; 36...Qd1 37.Kf2 Re2) 0–1. afsharian – samuel1c4, lichess.org, 2018.

4.Nf3 Bb7 5.e3 d5 6.c4 e6 7.Nc3 d4 8.ed4 cd4 9.Ne2 Bf3 10.gf3 e5 (10...d3 11.Nc3–/+) 11.Ba3 (11.Ng3 Nd7=+) 11...Ba3–/+ 12.Ra3 Nf6 13.Bg2 Nbd7 14.f4 Rc8 15.Bc6 0–0 16.Rg3 (16.Qa1 ef4 17.Nd4 Ne5–/+) 16...Nh5 (16...ef4 17.Nf4 Ne5 18.Rhg1–/+) 17.Rg4 (17.Rh3 Nf4 18.Nf4 ef4–/+) 17...Ndf6 (17...ef4 18.Nf4 Nf4 19.Rf4–+) 18.Rg5 (18.Rh4!? ef4 19.Nf4 Nf4 20.Rf4=+) 18...d3–/+ 19.fe5 h6 (better 19...de2 20.Qe2 Nf4–+) 20.Rg7?? (20.Rf5 de2 21.Qe2 Qd4=+) 20...Kg7?? (20...Ng7!? 21.Ng3 Nd7 22.f4–+) 21.Rg1? (21.ef6 Qf6 22.Rg1 Kh8 23.Ng3–+) 21...Kh8–+ 22.ef6? (22.Nc1 Qd4 23.ef6 Qc4–+) 22...Qf6 (better 22...de2!? 23.Qc2 Nf4 24.Qc3–+) 23.Nc3 (23.Ng3 Nf4 24.Kf1 Rg8–+) 23...Qe5 (better 23...Rc6 24.Qh5 Rc4–+) 24.Ne4?? (better 24.Kf1 Rg8 25.Rg2–/+) 24...Nf4 (better 24...Rc6 25.bc6 Qe4 26.Kf1 Nf4–+) 25.Qf3 (25.Kf1 Rc6! 26.bc6 Qe4 27.Qe1–+) 25...Qa1 (25...Rc6 26.Qd1 Qe4 27.Kf1 Re8 28.f3 Qe2 29.Qe2 de2 30.Kf2 Rg6 31.Rg6 e1Q) 26.Qd1 Qd1 (better 26...Qd4!? 27.Ng3 Qc4 28.Qa1 f6–+) 27.Kd1–/+ Rg8 (27...Rcd8 28.Rg4 Rg8 29.Rg8 Rg8 30.Kc1 Rg1 31.Kb2–/+) 28.Re1 (28.Rg3 Rg3 29.hg3 Ne6=+) 28...Ne2 (28...Rgd8 29.Nf6 Rd4 30.Re7–/+) 29.Nf6 Rg2 30.Bg2?? (better 30.Re2 de2 31.Ke2 Rh2 32.Nd7 Re8 33.Kf1–/+) 30...Rd8?? (better 30...Rc4 31.Re2 Rc1 32.Kc1 de2–+) 31.Bf3 (31.Nd5 Rd6+–) 31...Nd4 32.Bc6 (better 32.Re3 Ne6 33.Bh5 Rd6+–) 32...Nc6 (32...Rd6 33.Re8 Kg7 34.Nh5 Kg6 35.Nf4 Kf5+–) 33.bc6 Rc8 (33...Kg7 34.Re8 Rd4+–) 34.Re8 Re8 35.Ne8 Kg8 36.Nd6 (36.c7 Kf8 37.c8Q Ke7 38.Nc7 Kf6 39.Qh8 Kg5 40.Qg7 Kf5 41.Qf7 Kg4 42.Qg6 Kf3 43.Nd5 Kf2 44.Qg3 Kf1 45.Ne3) 36...Kg7 37.c7 Kg6 38.c8Q h5 (38...Kf6 39.Qd8 Kg6 40.Qg8 Kf6 41.Qf7 Kg5 42.Qg7 Kh5 43.h3 b5 44.Qg4) 39.Qb7 (39.Qf5 Kg7 40.Qf7 Kh6 41.f4 b5 42.Nf5) 39...f6 (39...Kg7 40.Qf7 Kh6 41.f4 b5 42.Nf5) 40.Qb6 (40.Qf7 Kh6 41.h4 b5 42.Nf5) 40...Kg5 (40...Kh6 41.Ne8 Kg5 42.f3 Kh4 43.Qd6 Kg5 44.Qf6) 41.Qa5 (41.Qe3 Kg6 42.Qg3 Kh7 43.Nf5 h4 44.Qg7) 41...Kg6 (41...Kh4 42.Nf5 Kg4 43.Ne3 Kh4 44.Qc7 Kg5 45.Qg3 Kh6 46.Nf5 Kh7 47.Qg7) 42.Qd5 h4 (42...f5 43.Qf7 Kh6 44.h4 f4 45.Nf5) 43.Qd3 (43.f4 Kg7 44.Qf7 Kh8 45.Nf5 h3 46.Qg7) 43...Kg7 (43...Kh6 44.Qf5 Kg7 45.Qd7 Kg6 46.Qg4 Kh7 47.Nf5 h3 48.Qg7) 44.Nf5 Kf7 (44...Kh7 45.Qd5 Kg6 46.Ne7 Kh6 47.Qg8 Kh5 48.Qg6) 45.Nh4 (45.Qd5 Ke8 46.Qe6 Kd8 47.Qe7 Kc8 48.Nd6 Kb8 49.Qb7) 45...Ke7 (45...Ke6 46.Qd5 Ke7 47.Nf5 Ke8 48.Qb7 Kd8 49.d4 Ke8 50.Qe7) 46.Qf5 (46.Nf5 Kf7 47.Qd5 Kg6 48.Ne7 Kh6 49.h4 f5 50.Qf7 f4 51.Nf5) 46...Kd6 47.Qf6 Kc5 (47...Kc7 48.Qe7 Kb6 49.c5 Ka5 50.Qe8 Kb4 51.Qb5 Ka3 52.Kc2 Ka2 53.Qb2) 48.Qf7 (48.f3 Kc4 49.Qc6 Kb3 50.Qb5 Ka3 51.Kc2 Ka2 52.Qb2) 48...Kb4 (48...Kb6 49.a5! Kc6 50.Nf5 Kc5 51.Qb7 Kc4 52.Ne3 Kc5 53.Qb6) 49.Nf5 (49.Qb7 Ka3 50.Kc2 Ka4 51.Qb5 Ka3 52.Qb3) 49...Ka4 (49...Kb3 50.Qb7 Ka3 51.Kc2 Ka4 52.Qb5 Ka3 53.Qb3) 50.h4 (50.Qd7 Kb4 51.Qb5 Ka3 52.Kc2 Ka2 53.Qa4) 50...Kb3 (50...Kb4 51.Qb7 Kc4 52.Kc2 Kc5 53.d4 Kc4 54.Qb3) 51.h5 (51.Nd4 Kb4 52.Qd5 Ka3 53.Kc2 Kb4 54.Nc6 Ka4 55.Qa5) 51...Kb2 (51...Kb4 52.Qb7 Kc4 53.Kc2 Kc5 54.d4 Kc4 55.Qb3) 52.h6 (52.Qb7 Ka3 53.Nd4 Ka4 54.Qb5 Ka3 55.Qb3) 52...Kb3 (52...Kb1 53.Qb7 Ka2 54.Kc2 Ka3 55.Qb3) 53.h7 (53.Qb7 Kc4 54.h7 Kc5 55.h8Q Kc4 56.Qd4) 53...Kb4 54.h8Q Kc5 55.Qc8 (55.Qb8 Kc6 56.Qd6) 55...Kb4 56.Qfb7 Ka5 57.Qca8 (57.Qb5) 1–0. Dino_Jarach (1835) – Jorgirio (1830), lichess.org, 2020.

4.Nf3 d5 5.g3 (5.e3 Nf6=) 5...Bb7 6.Bg2 e6 7.0–0 Bd6 8.Bb2 Nf6 9.e3 (9.Ne5 Qc7 10.Nf3 0–0=) 9...Nbd7 10.Qe2 (10.Na3 0–0=) 10...0–0+= 11.c4 Re8 (11...dc4 12.Na3+=) 12.d4 dc4 13.Qc4 Rc8 (13...Qe7 14.Nc3=) 14.Qe2 (14.Nc3 Bd5 15.Qd3 c4=) 14...e5+= 15.dc5 (15.de5 Ne5 16.Rd1 Bf3 17.Bf3 Qe7=) 15...Nc5 16.Nbd2 (16.Rd1 Bd5 17.Nc3=) 16...Ncd7 (16...Bd5 17.Rfd1+=) 17.Rfc1 (17.Nc4 Qe7=) 17...Qe7 Black prepares the advance e4 (17...Rc1 18.Rc1 Nc5 19.Nc4 Na4 20.Rd1=) 18.Nc4 Bb8 (18...e4 19.Nd6 Qd6 20.Nd4=) 19.Ba3+= Bf3 (19...Qd8 20.Nfe5 Bg2 21.Nd7 Qd7 22.Kg2 Qd5 23.Kg1+/–) 20.Bf3 (20.Qf3 Qe6 21.Nd2 e4+=) 20...Qe6 21.Rc2 (21.Bb7 Rc7 22.Bc6 e4+=) 21...e4= 22.Bg2 Nc5 (22...Ne5 23.Ne5 Be5 24.Rac1=) 23.Na5 Nb3 (23...Be5 24.Rac1 Na4 25.Nc6+=) 24.Nb3+/– Qb3 25.Rc8 Rc8 26.Qd1 Qd1 27.Rd1 Be5 (27...Re8+–) 28.Be7 Bc3 (28...h6 29.Rd8 Rd8 30.Bd8+–) 29.Rd8 (29.Bd8 Rc4+/–) 29...Rd8 30.Bd8 Nd7 31.Be4 Nc5 32.Bc2 Ba5 33.f4 (33.h3 h5+–) 33...h5 34.Kf2 Kf8 35.Bc7 Ke7 36.Be5 f6 37.Bd4 Ne6 38.Bg6 (38.Bb2 Nc5+–) 38...Nd4 39.ed4 h4 40.g4 (40.gh4 Bd2+–) 40...Ke6 41.Ke3 h3 (41...Bc3 42.Kd3 Bb2 43.Bf5 Kd6 44.g5+–) 42.Be4 Bb4 43.Kf3 Bd6 44.Kg3 (44.Bg6 Kd5 45.Ke3 Ke6+–) 44...g5 45.Kh3 Bf4 46.Kg2 Be3 47.d5 Ke5 48.Kf3 (48.Bf3 Kd6+–) 48...Bc5 ½–½. Bott,Hans Joachim – Amend, Wuerzburg op, 1987.

3.a4 c6

4.Bb2 c5 5.e3 d5 6.c4 e6 7.Nf3 Nf6 8.Qc2 Bb7 9.Be2 Bd6 10.0–0 Qc7 (10...0–0 11.cd5 Nd5 12.Rd1=) 11.h3 (11.Bf6 gf6 12.cd5 Bd5+=) 11...Nbd7 12.cd5 Bd5 13.Nc3 Bb7 14.Rac1 Rc8 15.d4 Qb8 16.Qb1 Ba8 17.e4 Bf4 18.Rc2 (18.Rcd1 0–0=) 18...cd4 (better 18...Ne4!? 19.Rd1 0–0–/+) 19.Nd4= Nc5 e4 draws heavy fire 20.Nc6 Qc7 0–1. GuestFTPC – GuestYNFV, freechess.org, 2017.

4.c4 cb5 5.ab5 d6 6.e3 (6.Nc3 Nf6+=) 6...h5 (6...e5 7.Bb2=) 7.Bb2 f6 (7...e5 8.Nc3+=) 8.Nf3 (8.Be2 h4+–) 8...Nd7 (8...e5 9.d4+–) 9.Qc2 Rh6 (9...Nh6 10.Bd3 Ra7 11.0–0+–) 10.Nh4 (10.Bd3 e6 11.Bg6 Ke7+–) 10...Ne5 11.Nf5 (better 11.d4 Nf7 12.Bd3+–) 11...Rg6? (11...Rh8 12.d4 Nf7 13.Nh4+–) 12.Be5?? (12.f4 Bb7 13.fe5 fe5+–) 12...de5? (better 12...fe5 13.Bd3 Kf7+–) 13.Nd6!!+– Qd6 (13...Qd6 14.Qg6 Double attack (14.Qg6 Discovered attack); 13...ed6 14.Qg6 Double attack (14.Qg6 Discovered attack)) 14.Qg6 Kd7 15.Qh5 (better 15.Qf7 Bb7 16.Qg8+–) 15...Nh6 16.g3 (16.Nc3 Bb7+–) 16...Bb7 17.Bh3 (17.Rg1!? f5+–) 17...e6 18.0–0 f5 (18...Qd3 19.Nc3+–) 19.Rc1 (19.Nc3 e4+–) 19...f4 (19...e4 20.Rd1+–) 20.Bg2 Bg2 21.Kg2 fg3 22.hg3 Qd3 (22...Be7 23.Nc3+–) 23.Rc3 (23.Qe5!? Nf7 24.Qh5 Nd6+–) 23...Qe4 (23...Qf5 24.Qf5 ef5 25.d4+–) 24.Qf3 (24.f3 Qf5 25.g4 Qh5 26.gh5 Ng8+–) 24...Qf3 25.Kf3 Be7 (25...Bb4 26.Rd3 Ke7 27.Nc3+–) 26.Rd3 Ke8 27.Nc3 Rc8 (27...Nf7 28.Na4 Nd6 29.Rd6 Bd6 30.Nb6+–) 28.Ra4 (28.Ne4 Nf7 29.Rc3 Bb4+–) 28...g5 (28...Nf7+–) 29.Ne4 g4 30.Ke2 Nf7 (30...Nf5+–) 31.Nc3 (31.c5!? bc5 32.Rc3 c4 33.Rcc4 Ra8+–) 31...Ng5 (better 31...Nd6+–) 32.Ne4?? (better 32.c5 bc5 33.Ne4 (33.Rg4?! c4 34.Rd6 Bd6 35.Rg5 Rb8+–; 33.Ra5 c4=+) 33...Ne4 34.Re4+–) 32...Ne4–/+ 33.f3? (better 33.c5 Nc5 34.Rc3 Na4 35.Rc8 Kf7 36.Rc4–/+) 33...Nc5 34.Rda3 Na4 (34...gf3!? 35.Kf3 e4 36.Ke2–+) 35.Ra4 gf3 36.Kf3 Rd8 37.Ra2 Kf7 38.Ke4 Kf6 (38...Rg8 39.Kf3–+) 39.g4 (39.d3 Kg5–+) 39...Bb4 (39...Rg8 40.Kf3–+) 40.d3 (40.d4 ed4 41.ed4 Bc3–+) 40...Be7 (40...Kg5 41.Ra1–+) 41.Rg2 (41.Rh2 a4–+) 41...Kg5 42.Kf3? (42.Rh2 Bd6–+) 42...Rf8 (42...Rd3 43.Ke4 Rc3 44.Re2–+) 43.Kg3?? (43.Ke4–+) 43...Bc5 (43...e4!? 44.Re2–+) 44.Rh2 (44.e4 a4 45.Rh2 a3–+) 44...Be3 45.Rh5 (45.Rh7 Bf2 46.Kg2 Bc5–+) 45...Kg6 46.Re5 (46.Rh1–+) 46...Bf4 47.Kh4 Be5 48.Kh3 Rf3 (48...Rf2 49.g5 Kg5 50.c5 Rh2) 49.Kh4 Rd3 (49...Rf2 50.g5 Kf5 51.c5 Rh2) 50.c5 (50.g5 Kf5 51.c5 Rd2 52.g6 Rh2) 50...a4 (50...Rd2 51.g5 Kf5 52.g6 Rh2) 51.c6 (51.g5 Kf5 52.cb6 Rd2 53.b7 Rh2) 51...Rc3 (51...Rd2 52.g5 Kf5 53.g6 Rh2) 52.c7 (52.g5 Kf5 53.c7 Rc2 54.c8Q Rh2) 52...Rc7 (52...Rc2 53.g5 Kf5 54.c8Q Rh2) 53.Kh3 a3 (53...Rc2 54.g5 Kf5 55.g6 Rh2) 54.Kg2 a2 55.Kf3 (55.Kf2 a1Q 56.Ke2 Qb2 57.Ke3 Rc3 58.Ke4 Qe2) 55...a1Q 56.Ke4 (56.Ke2 Qb2 57.Ke3 Rc3 58.Ke4 Qe2) 56...Rc5 (56...Qc3 57.g5 Rc4) 57.Ke3 (57.g5 Rc4 58.Ke3 Qf1 59.Kd2 Bf4) 57...Qa3 (57...Rc3 58.Ke2 Qb2 59.Ke1 Rc1) 58.Kf2 (58.Kd2 Qb2 59.Ke3 Rc3 60.Ke4 Qe2) 58…Rc2 (58...Rc2 59.Ke1 Qc1) 0–1. AhmedSultanov – YuriiKap, lichess.org, 2019.

4.c4 cb5 5.cb5 Bb7 6.e3 Nf6 7.Ne2 (7.Nf3 e6=) 7...g6 (7...e6 8.Bb2=) 8.Nf4 (8.Bb2 Bg7=) 8...Bg7 9.Bb2 0–0 10.Be2 Bg2?? (better 10...d6 11.d4 Nbd7=) 11.Ng2+– Qc7 (11...d5 12.Nf4+–) 12.Bf3 Ra7 13.Nf4 Qc4?! (13...e6+–) 14.Na3 Qc7 15.Qb3 (15.Rc1!? Qd8+–) 15...e6 16.Rc1 Qd8 17.Nc4 d5 18.Ne5 Nbd7? (18...Rc7+–) 19.Nc6 (19.Nc6 Qa8 20.Na7 Qa7 21.d4+–) 1–0. Akrapovik – btitiche, lichess.org, 2019.

4.c4 Bb7 5.d4 d6 6.e4 (6.Nc3 e6+=) 6...Nd7 (6...cb5!? 7.ab5 Be4+=) 7.Nc3 e5 8.Nf3 Ngf6 9.Bg5 Be7 10.Bd3 h6 11.Bh4 Nf8 (11...c5!? 12.de5 de5+=) 12.de5+/– de5 13.Ne5?? (13.bc6 Bc6 14.Ne5 Bb4+/–) 13...c5?? (13...Qd4 14.0–0 Qe5 15.bc6 Bc6–/+ (worse is 15...Qc3 16.cb7 Rb8 17.Rc1=)) 14.Bg3+/– N8d7? (14...Ne6 15.0–0+–) 15.0–0 (better is 15.Nc6!? Qc8 16.Ne7 Ke7 17.e5+–) 15...Ne5 16.Be5 0–0 17.Nd5 Nd5 18.ed5 Bd6 19.f4 f6 (19...Re8 20.Qh5+–) 20.Bc3 (20.Bd6 Qd6 21.Qg4 f5 22.Bf5 Rf6+–) 20...Qc7 21.Qg4 Bc8? (21...Rf7 22.Rae1 Kf8 23.Bg6+–) 22.Bf5 (better is 22.Qg6 f5 23.Rae1+–) 22...Bf5+/– 23.Qf5 Rae8 24.g3 Re3 25.Bd2 Re2 26.Rf2 Qe7 (better is 26...Rfe8!?+/–) 27.Re2+– Qe2 28.Qe6 Kh7?? (better is 28...Qe6 29.de6 Rd8+–) 29.Qe2 1–0. katchum (2530) – croach (2370), net–chess.com, 2013.

4.e3 c5 5.Be2 Bb7 6.Nf3 f6 (6...e5 7.d3+=) 7.0–0 e5 8.c4 (8.d4 e4 9.Nfd2 d5+=) 8...d5 9.cd5 Bd5 10.Nc3 Bb7 11.Bc4 (11.d4 cd4 12.ed4 e4+–) 11...h5 (11...e4!? 12.Ne1 Bd6+–) 12.Qb3 Nh6 13.Nh4 g5 14.Ng6 Rh7 15.Nf8 Kf8 16.f4 (16.Qc2 Rg7+–) 16...ef4 (16...gf4 17.Bb2 Ke8 (worse 17...Qd2 18.Nd5 Bd5 19.Bd5+–) 18.ef4 Qd4 (18...Qd2? 19.Nd5 Bd5 20.Bd5+–) 19.Rf2 Ng4+=) 17.Nd5 Rd7 18.ef4?? (18.e4 Ng4+–) 18...g4?? (18...Bd5 19.fg5 Ng4 20.h3=+) 19.Nf6?? (better 19.Ne3+–) 19...Qf6–/+ 20.Bb2 Qd6 (20...Qf5 21.Qc3 Rd4 22.Rae1=+) 21.d4 (better 21.Rae1 Nf5 22.Re5=) 21...cd4?? (better 21...Nf5 22.dc5 Qc5 23.Rf2 Qe3–/+) 22.Ba3+– Nf5 23.Bd6 Rd6 24.Qa3 Kg7 (24...Bc8 25.Bd3 Nd7 26.Bf5+–) 25.Rfe1 Kf6 (25...Bc8 26.Bd3 Nd7 27.Bf5 Nc5+–) 26.Re8 (better 26.Re5 Nd7 27.Rf5 Kf5 28.Qd6+–) 26...Nd7 27.Ra8 (27.Qd6 Nd6 28.Re6 Kf5 29.Rd6 Nc5+–) 27...Ba8 28.Re1 Nc5 29.Re5 Ne3 (29...Be4 30.Rc5 bc5 31.Qc5+–) 30.Rc5 bc5 31.Qc5 Nc4 32.Qg5 (better 32.Qc4 Be4 33.Qc5 Ke7 34.Qe5 Re6 35.Qd4 h4+–) 32...Kf7 33.Qh5 Ke7 34.Qc5?? (better 34.Qh7 Kf6 35.Qh8 Kf5 36.Qc8 Kf4 37.Qc4+– (37.Qa8 d3 38.Qc8 Rd4 39.g3 Ke3 40.Qe8 Re4–+)) 34...Nb6 35.Qc7 (35.Qe5!? Kd7 36.Qg7 Kc8 37.Qg4 Rd7+–) 35...Ke6+– 0–1. GuestMKNW – Guestkurex, freechess.org, 2017.

4.e3 d5 5.Bb2 c5 6.c4 Bb7 7.Nf3 Nf6 8.cd5 Bd5 9.Nc3 (9.Be2 Nbd7+=) 9...Bb7 10.Be2 (10.Qc2 Nbd7+=) 10...e6 11.0–0 Be7 (11...Nbd7 12.Qc2+=) 12.Ne5+– Nbd7 13.Nc6 Qc7 14.Ne7 Ke7 15.f4 Rhd8 16.Qe1 (16.Qc2 Kf8+=) 16...Kf8+= 17.Qg3 Kg8 18.Rad1 e5 19.Bc4 e4? (better 19...Rac8!?+–) 20.Nd5!+– Qd6 (20...Bd5 21.Bd5 Combination; 20...Nd5 21.Qg7 Mate attack) 21.Be5 Ne5 (21...Bd5 22.Bd6 Bc4+–) 22.fe5 Qf8 (22...Nh5 23.Qg5 Bd5 24.ed6 Bc4 25.Qh5 Rd6+–) 23.Nf6 (23.ef6?! Bd5 24.Bd5 Rd5+=) 23...Kh8 24.Nh7! Kh7 25.Rf7 Qg8 26.Qh3 Kg6 27.Rf5 Qh7 (27...Qc4 28.Qh5) 28.Bf7 1–0. GuestJYTV – GuestFoodlate, freechess.org, 2019.

4.e4 Bb7 =.

4.c4 c5

5.Bb2 Bb7 6.d4 Qc7 (6...cd4 7.Bd4 f6 8.f4=) 7.dc5 Qc5 8.Bd4 (8.e3 Nf6+=) 8...Qc7= 9.Nf3 d6 (9...f6 10.e3=) 10.e3 (10.e4 Nf6 11.Nc3 Ne4+=) 10...e5 11.Bb2 Be7 12.Be2 Nf6 13.0–0 h5 (13...0–0 14.Nc3=) 14.h3 e4 (14...Nbd7 15.Nc3+=) 15.Ng5 (15.Nd4 Nbd7+=) 15...Ng4 (15...Nbd7 16.Bd4+=) 16.Bg7 (16.hg4 hg4 17.Bg7 Rh4+–) 16...Rg8 17.hg4 (worse 17.Bg4 Rg7 18.Ne6 fe6 19.Be6 Bf6–/+) 17...hg4 (17...Rg7 18.Ne4! Be4 19.Qd4 Bg2 20.Qg7 Bf1 21.Bf1 hg4 22.Qg8 Bf8 23.Qg4+–) 18.Nf7! (18.Bg4?! Rg7 19.Nh3 Qc4=) 18...Kf7 (18...Rg7!? 19.Nh6 Nd7+–) 19.Bd4+– Bf6 20.Bf6 Kf6 21.Bg4 (better 21.Nc3 Qc5 22.Bg4+–) 21...Qg7?? (better 21...Nd7 22.Nc3 Ne5+–) 22.Qd6 Kf7 23.Qd7 (better 23.Bh5 Qg6 24.Qc7 Nd7 25.Qd7 Kf8 26.Bg6 Rg6 27.Qb7+–) 23...Kg6 (better 23...Nd7 24.f3 Qa1–+) 24.Qg7 (24.Qf5 Kh6 25.Qh5) 24...Kg7 25.Be6 (25.Nc3 Kf6 26.f3 ef3 27.Bf3 Bf3 28.Rf3 Ke5+–) 25...Re8 26.Bd5 Bd5 27.cd5 Nd7 28.Nc3 Rh8 (28...Rac8 29.Ne2 Rc4+–) 29.Ne4 Rh6 30.Ng3 Rg8 (30...Kf7 31.e4+–) 31.Nf5 Kg6 32.Nh6 Kh6 33.e4 1–0. AleksandrNekhoroshik (1765) – anderson76 (1760), lichess.org, 2021.

5.Bb2 d6 6.e3 Bb7 7.Nf3 Nd7 8.Be2 e5 9.0–0 Be7 10.d3 g5 (10...Ngf6!?=) 11.Nc3+– h5 12.h3 (better 12.Nd2!?+–) 12...g4= 13.hg4 hg4 14.Nh2 (14.Ne1 f5 15.f3=+) 14...Ngf6 (14...f5!? 15.Qe1 Bg5=+) 15.Bg4 (15.Ng4 Bf8+=) 15...Ng4= 16.Qg4 Nf6 17.Qg7?? (better 17.Qe2=) 17...Rg8–+ 18.Qh6 (18.Qg8 Ng8 19.e4–+) 18...Qd7 (better 18...Rg2 19.Kh1 Rg6 20.e4 Rh6–+) 19.e4= 0–0–0 20.Nd5 Rh8?? (better 20...Bd5 21.cd5 Rg6–/+) 21.Qe3 (better 21.Nb6 Kc7 22.Qh8 (22.Nd7?! Rh6 23.Nf6 Rf6+–) 22...Kb6 23.Qh6+–) 21...Rdg8?? (better 21...Bd5 22.cd5 Rh2 23.Qg3–+) 22.g3 (better 22.Nb6 Kc7 23.Nd7 Rh2 24.Kh2 Ng4 25.Kg1 Ne3 26.fe3 Kd7 27.Rf7+–) 22...Qh3 (better 22...Nd5!? 23.cd5 Qh3 24.Rfb1–+) 23.Ne7 Kd7 24.Rfe1 (24.Rfb1 Ke7 25.Qf3 Qh2 26.Kf1 Nh5–+) 24...Qh2 (24...Ke7 25.Rec1–+) 25.Kf1 Rg7 (better 25...Ke7 26.Ke2 Ng4–+) 26.Nf5+= Rgh7 27.Ke2 (27.Qg5 Qh1 28.Ke2 Qh5 29.Qh5 Rh5+=) 27...Qh5 28.Kd2 Ng4 29.Qe2 Qg5 30.Kc2 (30.Kc3 Rh2 31.Rf1 Kc7+=) 30...Rh2 (30...Nf2!? 31.Bc1 Qg4=+) 31.Rf1+= Nh6 32.Bc1 Qg6?? (better 32...Nf5 33.Bg5 Nd4 34.Kd1 Ne2 35.Ke2 f5 36.ef5 R8h5+=) 33.Bh6+– d5 (33...R8h6 34.Nh6 Rh6+–) 34.cd5 (34.Bg7 Rg8 35.Be5 Re8+–) 34...c4 (34...R8h6 35.Nh6 Rh6 36.Rh1+–) 35.dc4 (better 35.Bg7 Rg8 36.Be5 Re8+–) 35...Kc7 (35...R8h6 36.Nh6 Rh6 37.Rh1+–) 36.Be3 (36.Bg7!? Re8 37.Rh1 Rh7 38.Rh7 Qh7+–) 36...Kb8 (36...Bc8 37.Qf3+–) 37.Nh4 (37.Qf3 Qf6+–) 37...Qd6 (37...Qe4 38.Qd3 Qg4 39.Bb6+–) 38.Kb3 (better 38.c5 bc5 39.Qc4 Qf6+–) 38...Qb4 39.Kc2 Rg8?? (39...Qd6 40.Rac1 Bc8+–) 40.Nf3+– Rhh8 (40...Rc8 41.Ne5 Qe7 42.Qg4+–) 41.Bb6 Rc8 42.Ne5 Rhe8 (42...Qe7 43.Nc6 Bc6 44.bc6+–) 43.Nc6 Bc6 44.dc6 (44.bc6 Qe7+–) 44...Qd6 (44...f5 45.Rfb1 Qe7 46.Qd3 Qe4 47.Re1 Qd3 48.Kd3+–) 45.Ba5 Re5 (45...Qe6 46.c5+–) 46.Rfd1 (46.Qe3 Ka8 47.Qb6 Rc6 48.bc6 Qb8+–) 46...Qg6 47.Rd4 Rce8 48.c7 (better 48.Rd8 Rd8 49.c7 Kb7 50.cd8Q Rc5 51.Qe7 Ka8 52.Qc5 Qe6 53.Qee3 Qc4 54.Qc4 Kb7 55.Qc6 Kb8 56.Qeb6) 48...Kc8 49.Rd8 Rd8 50.cd8Q Kb7 51.Qc7 Ka8 52.Qe5 (52.Qe5 Qg5 53.Qe8 Qd8 54.Qd8 Kb7 55.Rd1 f5 56.Rd7; 52.Qc8 Ka7 53.Qe3 Rc5 54.Qec5 Qb6 55.Bb6) 1–0. AleksandrNekhoroshik (1775) – anderson76 (1750), lichess.org, 2021.

5.e3 Bb7 6.Bb2 e6 7.Nf3 f6 (7...Nf6 8.Be2=) 8.Nh4 (better 8.Be2+=) 8...Be7?? (better 8...Nh6=) 9.Qh5+– g6?! (9...Kf8 10.Ng6! hg6 11.Qh8 d5+–) 10.Ng6! hg6 (10...hg6 11.Qh8 Pinning (11.Qh8 Deflection)) 11.Qh8 Kf8 12.Qh7 Qe8 13.Qh3 (13.Bd3!? Qf7 14.Bg6 Qh7 15.Bh7 f5 16.Bg8 Kg8+–) 13...Qf7 14.Be2 f5 15.0–0 g5 16.f4 (16.d4!? d6+–) 16...g4 17.Qg3 Nf6 18.Bf6 (18.Nc3!? Ke8+–) 18...Bf6 19.Nc3 d5 20.cd5 ed5 21.Rad1 Nd7 22.d4 (22.h3 d4 23.Nb1 Qb3 24.hg4 Qa4+–) 22...Qg7 (22...Qe6 23.Qf2 Re8+–) 23.dc5 Bc3 24.c6 Bc6 (24...Nc5 25.cb7 Qb7 26.Bd3+–) 25.bc6 Nc5 26.Rd5 Ne4 (26...Qf6 27.e4! Ne4+–) 27.Rf5 Ke8 (27...Ke7 28.Qg4 Qg4 29.Bg4+–) 28.Qg4 Qg4 29.Bg4 Bd2 (29...Rc8 30.Rd1 Rc6 31.Re5 Be5 32.Bd7 Ke7 33.Bc6 Nd6 34.fe5 Nc4+–) 30.Re5 (30.Re5 Kf7 31.Re4+–) 1–0. Abdullaevich (1870) – Anokill69 (1790), lichess.org, 2020.

5.e3 Bb7 6.Nf3 h6 7.Bb2 d5 8.d4 Nd7 9.Nbd2 Ngf6 10.Be2 Qc7 (10...e6 11.0–0=) 11.dc5 (11.cd5 Bd5 12.0–0 e6+=) 11...Qc5 (11...Nc5 12.Be5 Qd8 13.0–0+=) 12.Rc1 Qb4 13.Qb3 (13.Qc2 Rc8+=) 13...Rc8 (13...Nc5 14.Qc2 Qa4 15.Qa4 Na4 16.Bd4+=) 14.0–0= Qd6 (better is 14...Nc5 15.Qb4 ab4 16.cd5 Na4 17.Rc8 Bc8+=) 15.cd5+– Bd5?? (better is 15...Rc1 16.Rc1 Nc5+–) 16.Rc8 1–0. Fournier,Frederic (2090) – guestpnfp, jeu.europe–echecs.com, 2013.

5.Nf3 Bb7 6.d4 Bf3 7.gf3 e6 8.d5 d6 9.e4 Qf6 10.Ra3 Nd7 11.Bh3 Ne5 (better is 11...0–0–0!?=) 12.f4+/– Nc4? (better is 12...Nd7+/–) 13.de6?? (better is 13.Rc3+–) 13...Na3–/+ (worse is 13...fe6 14.Rc3 d5 15.ed5+/–) 14.ef7 Qf7 (14...Kf7?? 15.Qd5 Ke8 16.Qa8 Kf7 17.Qd5 (17.Na3?! Qc3 18.Bd2 Qh3+/–) 17...Ke8 18.Ba3 (18.Na3?! Qc3 19.Bd2 Qh3+/–) 18...Qf4 19.Qc6 Kf7 20.Qd7 Be7 21.Be6 Kg6 22.Rg1 Kh6 23.Rg4+–) 15.Na3 Nf6 16.f3 Be7 17.Qe2 White prepares the advance e5 17...Kd8 18.Nc4 White intends e5 18...Kc7 19.e5 Ne8 (19...de5 20.Qe5 Kb7–/+) 20.ed6? (better is 20.Be6! Qg6 21.f5=) 20...Nd6–+ (20...Bd6 21.Qe4 Qe7 22.Ne5=) 21.Be6 Qf6 22.Nd6 Bd6 (22...Kd6 23.0–0 Kc7 24.Bb2 Qg6 25.Kh1=) 23.Qe4 Qd8 24.Qc6 Kb8 25.Bd5 Ra7 26.Be4 Qc7 27.Qc7 Rc7 28.Rg1 g6 29.h4 Rf8 30.Rg5 Bf4 (30...Bf4 31.Bf4 Rf4–+) 0–1. jboger (2100) – opportunity (2320), net–chess.com, 2011.

4.e3 Bb7

5.Bb2 e6 6.Nf3 Nf6 7.c4 Be7 8.Be2 0–0 9.0–0 cb5 (9...d5 10.Nc3=) 10.ab5 (10.cb5 d6=) 10...d5 11.d4 (11.Na3 Nbd7=) 11...dc4 12.Bc4 Nbd7 (12...Bd6 13.Ba3=) 13.Nbd2 Rc8 (13...Ne4 14.Ne4 Be4 15.d5 ed5 16.Bd5 Bd5 17.Qd5=) 14.Qe2 Nd5 (14...Ne4 15.Ne4 Be4 16.Rfc1=) 15.Rfc1+= N7f6 (15...Bd6 16.e4 Re8 17.Ba3 Ba3 18.Ra3=) 16.e4 Nf4 17.Qe3 Ng6 18.h3 Nh5 19.Bc3 (19.Ba3 Ba3 20.Qa3 Qe7+=) 19...Nhf4= 20.Bf1 (20.Kh2 Re8=) 20...Nh5 (20...f5 21.ef5 ef5 22.Ne5=+) 21.Nc4 (21.Bb2 Rc1 22.Rc1 Qd7+=) 21...Nhf4 22.Ra4 Nh5 (22...Re8 23.Nce5+=) 23.g3 (23.Nce5 Nhf4+=) 23...Nf6 24.Bd3 Nh5 (24...Nd7 25.Qe2+=) 25.Bb2 Nf6 26.Bc3 (26.Ba3 Ba3 27.Ra3 Ne8+=) 26...Nh5 27.h4 (27.Nce5 Ne5 28.Ne5 Bg5+=) 27...Nf6= 28.Qe2 h6 (28...Re8 29.Nfd2+=) 29.Kh2 (29.Ne1 Ne8+=) 29...Ng4 (29...Re8 30.Nfd2+=) 30.Kg2 Nf6 31.Bd2 (31.Ne1 Re8+=) 31...Ng4 (31...Re8 32.Kg1=) 32.h5+= Nh8 33.Nfe5 Ne5 34.Ne5 f5 (34...Rc1 35.Bc1 Bb4 36.Qe3+=) 35.Nc6 Bc6 (35...Qd7!?+=) 36.bc6+– Bg5 (36...fe4!? 37.Qe4 Qd5 38.Qd5 ed5 39.Be2+–) 37.f4 Be7 38.ef5 1–0. DEFFM – abracadabras, freechess.org, 2018.

5.c4 d5 6.Bb2 cb5 7.ab5 e6 8.Nf3 Nf6 9.Nc3 Bd6 10.Be2 (10.cd5 ed5 11.Be2 0–0=) 10...Qc7 (10...dc4 11.Bc4 Nbd7 12.d3=) 11.h3 (11.cd5 Nd5 12.Nd5 Bd5=) 11...0–0 12.Qc2 dc4 13.Bc4?? (better 13.Ra4=+) 13...Bf3 (13...Qc4 14.d3 Qc7 15.e4–+) 14.gf3 Qc4 15.Ra4 Qc7 16.Rg1 Nbd7 17.Ne4 (17.f4–+) 17...Qc2 18.Nf6 Nf6 19.Bf6 Qc1 (19...Qc1 20.Ke2 Qg1–+; 19...Qa4?? 20.Rg7 Kh8 21.Rg6) 0–1. AhmedSultanov (1745) – cincimin (1780), lichess.org, 2019.

5.Nf3 e6 (5...Nf6 6.d4=) 6.Bb2 f6 (6...Nf6 7.Be2=) 7.Nh4 (7.bc6 dc6 8.Nd4 Qd6+=) 7...g6 (7...Nh6 8.Bd3=) 8.Bc4 (8.Nf3 Bb4+=) 8...Bg7 (8...d5 9.bc6 Bc6 10.Be2+=) 9.0–0+= d5 (9...Ne7 10.Nf3+=) 10.bc6 Bc6 (10...Nc6 11.Bb5=) 11.Bb3 (11.Be2 Ne7+=) 11...e5 (11...Ne7 12.Nf3=) 12.Nc3 (12.d4 b5+=) 12...f5 (12...Na6 13.d4+=) 13.Nf3+/– e4 14.Nd4 Bd4 15.ed4 Nf6 16.f3 0–0 17.fe4 Ne4 (17...fe4 18.Qe2 Kg7 19.Ba3+/–) 18.Qe1 (18.Ne4 fe4 19.Rf8 Qf8+/–) 18...Nc3 19.Bc3 Re8 20.Qg3 Re4 (better is 20...Qd7!?+/–) 21.Rf5+– Kg7 (21...Na6 22.Raf1 Qd7 23.d3+–) 22.Raf1 Qe7? (22...Ra7+–) 23.Rd5 Bd5 (23...Kh6+–) 24.Bd5 Ra7 (24...Nc6 25.Bc6 Re8 26.Be4+–) 25.Be4 Qe4 (25...Qe8+–) 26.d5 Kg8 (26...Qe5 27.Qe5 Kh6 28.h4 Rd7 29.Qg5) 27.Qb8 1–0. Wall,Bill – Reanna, internet, 2006.

5.Nf3 Nf6 6.c4 e6 7.Bb2 Be7 8.Nc3 0–0 9.Be2 d5 10.0–0 c5 11.h3?? (11.Qc2 dc4 12.Ne5 Nd5=) 11...dc4?? (better 11...d4–+) 12.Bc4= Ne4 (12...Nbd7 13.d3=) 13.Ne4 Be4 14.Bc3 (14.d3 Bd5+=) 14...Bf6= 15.Bf6 Qf6 (worse 15...gf6 16.d4+–) 16.Be2 (16.Rc1 Ra7=) 16...Nd7 17.d4 Rad8 18.dc5 (18.Rc1!?=+) 18...Nc5–/+ (18...bc5?! 19.Nd2 Bf5 20.Nc4=) 19.Qe1 Bf3 (19...Nd3 20.Qb1–/+) 20.Bf3=+ Rd6 21.Rd1 Rfd8 22.Rd6 Rd6 23.Qa1 Qa1 24.Ra1 Rd2 (24...Kf8 25.Rd1 Ke7 26.Ra1=+) 25.Rd1= Rd1 26.Bd1 e5 27.f3 Kf8 28.g4 (28.Bc2 h5=) 28...g5 (28...Ke7 29.h4=) 29.Kf2 Ke7 30.Kg3 Kd6 31.f4 gf4 32.ef4 e4 33.h4 (33.Kf2!?=) 33...Kd5–/+ 34.f5 Kd4 35.g5 Kd3 (35...e3 36.h5 Ne4 37.Kf4+–) 36.h5= e3 37.Kf3 (37.g6 hg6 38.fg6 fg6=) 37...Kd2=+ 38.Be2 Na4?? (38...Nd7 39.Bf1 Ne5 40.Ke4 Ke1 41.Ke3 Kf1+–) 39.g6+– fg6 40.hg6 (worse 40.fg6 hg6 41.h6 Nc3+–) 40...hg6 41.fg6 Nc3 42.g7 Ne2 43.g8Q Nd4 Black plans e2 44.Ke4 (44.Kg2 e2 45.Qg5 Kd1+–) 44...e2 45.Kd4?? (better 45.Qg2 Nb5 46.Qg5 Kd1 47.Qd5 Kc1 48.Qc4 Kd2 49.Qa2 Kd1 50.Kd3 e1N 51.Kc4 Nd6 52.Kb3+–) 45...e1Q=+ 46.Qa2 Kd1 47.Qb1 Ke2 48.Qe4 Kf2 (48...Kd2 49.Qd3 Kc1 50.Qa3 Kd1 51.Qb3 Ke2 52.Qe3 Kf1 53.Qh3 Kg1 54.Qg4 Kh2 55.Qh5 Kg2 56.Qg6 Kf1 57.Qc6–/+) 49.Qf5 (49.Qh4 Kf1 50.Qh1 Ke2 51.Qe4 Kd2 52.Qd3 Kc1 53.Qa3 Kd1 54.Qb3 Ke2 55.Qe3 Kf1 56.Qh3 Kg1 57.Qg4 Kh2 58.Qh5 Kg2 59.Qg6 Kf1 60.Qc6–/+) 49...Kg1 50.Qg6 Kf1 51.Qf5? (better 51.Qc6 Qf2 52.Kd3 Qe2 53.Kd4–/+) 51...Qf2–+ 52.Qf2 Kf2 53.Kd5 Ke3 54.Kc6 a4 55.Kb6 a3 56.Kc7 a2 57.b6 a1Q 58.b7 Qc3 59.Kb6 (59.Kd7 Qd4 60.Kc8 Qc5 61.Kd7 Qb6–+) 59...Qb4 (59...Qe5 60.Ka7 Qa5 61.Kb8–+) 60.Kc7 Qc5 61.Kd7 Qb6 62.Kc8 Qc6 63.Kb8 Kd4 64.Ka7 Qc5 65.Ka6 (65.Kb8 Kd5 66.Ka8 Qa5 67.Kb8 Kc6 68.Kc8 Qc7) 65...Qa3 (65...Qc7 66.Ka7 Kd5 67.Ka6 Kc6 68.b8Q Qb8 69.Ka5 Qb5) 66.Kb6 Qb4 (66...Qd6 67.Ka7 Qc7 68.Ka8 Qa5 69.Kb8 Kd5 70.Kc8 Qa6 71.Kc7 Qc6 72.Kb8 Kc5 73.Ka7 Qa4 74.Kb8 Kb6 75.Kc8 Qe8) 67.Ka6 (67.Kc7 Qc5 68.Kd7–+) 67...Qd6 (67...Kc5 68.Ka7 Qa5 69.Kb8 Kc6 70.Kc8 Qc7) 68.Ka7 (68.Kb5 Kd5 69.Ka5 Qa3 70.Kb6 Qc5 71.Ka6 Kc6 72.b8N Kc7 73.Nd7 Qb4 74.Ne5 Qb6) 68...Qc7 69.Ka8 Qa5 70.Kb8 Kc5 (70...Kd5 71.Kc8 Qa6 72.Kc7 Qc6 73.Kb8 Kc5 74.Ka7 Qa4 75.Kb8 Kb6 76.Kc8 Qe8) 71.Kc8 Qa6 (71...Kc6 72.b8N Kd6 73.Kb7 Qc7 74.Ka8 Qb6 75.Nd7 Qb5 76.Ka7 Kc7 77.Nc5 Qc5 78.Ka6 Qb6) 72.Kc7 (72.Kd7 Qb7 73.Ke6 Qe4 74.Kf6 Kd5 75.Kf7 Qf3 76.Ke7 Ke5 77.Kd7 Qb7 78.Kd8 Ke6 79.Ke8 Qe7) 72...Qa7 (72...Qc6 73.Kd8 Qb7 74.Ke8 Qg7 75.Kd8 Kd6 76.Ke8 Qe7) 73.Kc8 (73.Kd7 Qb7 74.Ke6 Qe4 75.Kf7 Qf5 76.Kg7 Kd4 77.Kh6 Qg4 78.Kh7 Ke5 79.Kh6 Kf6 80.Kh7 Qg7) 73...Qa6 (73...Kc6 74.b8N Kd6 75.Na6 Qa6 76.Kb8 Qb5 77.Kc8 Qb4 78.Kd8 Qb8) 74.Kc7 Qb6 (74...Qc6 75.Kd8 Qb7 76.Ke8 Qg7 77.Kd8 Kd6 78.Ke8 Qe7) 75.Kc8 (75.Kd7 Kd5 76.b8Q Qb8 77.Ke7 Qf4 78.Kd7 Qf7 79.Kd8 Kd6 80.Kc8 Qc7) 75...Qc6 76.Kb8 (76.Kd8 Qb7 77.Ke8 Qg7 78.Kd8 Kd6 79.Ke8 Qe7) 76...Kb6 77.Ka8 Qb7 0–1. Abdullaevich (1950) – gUnA1 (1975), lichess.org, 2020.

3.a4 d5

4.Ba3 Nd7 5.d4 e6 (5...e5 6.Bf8 Kf8 7.e3=) 6.Bf8+= Nf8 7.c3 (7.e3 Qd6+=) 7...Nf6 8.f3 (8.e3 N8d7=) 8...Ng6 9.e3 Qd6 10.Ne2 (10.c4 0–0=) 10...Bb7 (10...e5 11.Ng3=+) 11.Ng3= 0–0–0 12.Bd3 Rhe8 13.Bg6 (13.0–0!?=) 13...hg6=+ 14.Nd2 e5 15.0–0 Rh8 16.Qe2 Qe7 (16...Rh7 17.Rfd1=+) 17.Qf2 Nh5 18.Nh5 Rh5 19.Qg3 (19.c4 Rdh8 20.h3 Qg5=+) 19...Rdh8 20.h3 Kb8 (20...Rg5 21.Qh2 ed4 22.ed4 Qe3 23.Rf2 Qc3 24.Re1–/+) 21.Rfe1 (21.f4 e4=) 21...Bc8 22.Kf1 Bh3 (22...e4!?=+) 23.gh3= Rh3 24.Qg4?? (better 24.Qe5 Qd7 25.Qg7–/+) 24...f5 25.Qg6 Qh4?? (better 25...ed4 26.e4 dc3–+) 26.Qf5?? (better 26.Ke2 Rh2 27.Kd3 e4 28.fe4 Qe4 29.Ne4 fe4 30.Qe4 de4 31.Ke4+–) 26...Rh1 (26...Rh2 27.Qf8 Rf8 28.Ne4 Qh3 29.Kg1 Qg2) 27.Ke2+– Qh2 (27...Rh2 28.Kd3 ed4 29.cd4 Qd8+–) 28.Kd1 (28.Kd3 Re1 29.Re1 ed4 30.ed4 Qd6+–) 28...Rh5?? (better 28...Re1 29.Ke1 Qg1 30.Ke2 Qa1 31.Qe5 Qc3–+) 29.Qf8+– Kb7 30.Qg7 (better 30.Kc2!? Re1 31.Re1 Qg3+–) 30...Re1?? (better 30...Qf2 31.Kc2 Re1 32.Re1 Qe1=) 31.Ke1+– Qh4? (31...Qh1 32.Nf1 Qf3+–) 32.Ke2 Rg5 (32...Qh2 33.Kd3+–) 33.Qd7 (33.Rh1 Qg3 34.Qf6 Qg2 35.Kd3 e4 36.fe4 de4 37.Ne4 Qh1 38.Ng5 Qd1 39.Ke4 Qa4 40.Qc6 Kb8+–) 33...Rg2 34.Kd3 Qf2 (34...ed4 35.Qd5 Kb8 36.ed4+– (worse 36.cd4 Qf2 37.Qd8 Kb7+–)) 35.Qd5 Kb8 36.Ra2 (36.Rd1!? ed4 37.ed4 Rh2+–) 36...Qe2 37.Ke4 ed4 38.Qd4 (38.Qd8 Kb7 39.Qd4 Qe1+–) 38...Rh2 (38...Rg8 39.Qd7+–) 39.Qd8 Kb7 40.c4 Qg2 (40...Rh5 41.Ra1 Qg2 42.Kd3+–) 41.Qd5 Kb8 42.c5 Rh4 (42...Qg6 43.Kd4 Qf6 44.Kd3 Rh8+–) 43.Kd3 Qg6 44.e4 (44.Ne4 Rh8 45.cb6 Qb6+–) 44...Rh8 45.c6 (better 45.cb6 Qb6 46.Nc4 Qf6+–) 45...Qf6 46.Kc4 (better 46.Qb3+–) 46...Rd8 47.Qd8 Qd8 48.Kc3 Qf6 49.Kd3 Qd6 50.Kc3 (better 50.Ke2+–) 50...Qc5 51.Kd3 Qd6 52.Kc3 (52.Ke2!? Qe5+–) 52...Qc5 (52...Qf6 53.Kc2+–) 53.Kd3 (better 53.Kb2!?+–) 53...Qd6= 54.Kc3 (better 54.Ke2+–) ½–½. lindsey000 – pheon1x, gameknot.com, 2018.

4.d4 e6 5.Nf3 Nf6 6.Bg5 Bb4 7.c3 Bd6 8.Ne5 h6 9.Bh4 g5 10.Bg3 h5 11.h4 (11.Nd3 h4 12.Bd6 cd6=) 11...g4 (11...Ne4!? 12.Bh2 g4=+) 12.Nd2+= Nbd7?? (better is 12...0–0+=) 13.Nc6+– (13...Bg3 14.fg3+–) 1–0. Neresjan – Petrini,Mario, CiF, 1989.

4.d4 Nf6 5.e3 e6 6.Nf3 Bd6 7.Ba3 h6 8.Nbd2 Bb7 9.Be2 Ba3 10.Ra3 0–0 11.Ne5 Qd6 12.Ra1 Nbd7 13.Ng4 Ng4 14.Bg4 f5 15.Be2 e5 16.de5 Qe5 17.0–0 f4 18.ef4 Rf4 19.Nf3 Qf6 20.g3 Rf5 (better is 20...Re4+=) 21.Qd4?? (21.Nh4 Re5=) 21...Re8 (better is 21...Rf3 22.Rfd1 Rc3–+) 22.Qf6= Rf6 (worse is 22...gf6 23.Nd4 Rfe5 24.Bd3+=) 23.Nd4 Re4 24.Rad1 (24.Rfd1!?=) 24...Nc5+= 25.f3 Re3 26.Kf2 Ra3 27.Ra1 Ra4 28.Ra4 Na4 29.c4 Nc5 30.h4 Kf8 31.Ke3 Ke7 32.g4 Ne6 33.Nf5 Kf8 34.Rd1 dc4 35.Bc4 Bc8 (35...g6!? 36.Nh6 Rf3 37.Kd2 Nd4–+) 36.Be6 (36.h5!?=) 36...Be6–/+ 37.Rd8 Kf7 38.Nd4 g5 39.Ne6? (better is 39.h5+=) 39...Re6–+ (39...Ke6?! 40.hg5 hg5 41.Rg8=) 40.Kf2 gh4 41.Rd7 (41.Rc8 Re7–+) 41...Re7 (41...Re7 42.Rd5 a4–+) 0–1. Sapareva,Magdalena (1675) – Artunov,Kirkor (2035), ch–BUL Seniors, 2011.

4.h3 c6 (4...e5 5.Bb2 Bd6 6.Nf3=+) 5.e3= e6 6.c3 (6.Bb2 Nf6=) 6...Nf6 7.f3? (7.bc6!? Nc6 8.Nf3=) 7...c5 (7...Nh5!? 8.Ne2 Qh4 9.g3 Ng3 10.Ng3 Qg3 11.Ke2 cb5 12.ab5–+) 8.Qb3 (8.d4 Bd6–/+) 8...c4 9.Bc4? (better 9.Qc2–/+) 9...dc4–+ 10.Qc4 Be7 (10...e5 11.Ba3–+) 11.Ba3 Ba3 12.Na3 0–0 13.Ne2 Bb7 14.e4 e5 15.Rd1 Qd6 16.Nc2 Nbd7 17.d4 Rac8 18.Qb3 Rfd8 19.Ne3 Be4 (better 19...Nf8!?–/+) 20.fe4= Ne4 21.Nf5 Qf6 (better 21...Qf8 22.0–0 Re8=) 22.0–0+– Ndc5 23.dc5 Rd1 (23...Nc5 24.Qc2 Rd1 25.Rd1 Rd8+–) 24.Rd1?? (better 24.Qd1 Rd8 25.Nd6+–) 24...Qf5= 25.Rf1?? (25.Qd5 Re8 26.cb6 Qf2 27.Kh2+–) 25...Nc5 (better 25...Qf1! 26.Kf1 Nd2 27.Kf2 Nb3 28.cb6 Nc5–+) 26.Rf5–/+ Threatening mate... how? 26...Nb3 27.Re5 f6 (better 27...Nc5!?–/+) 28.Re6= Rc4 (better 28...Rb8!?=) 29.Rb6+– Ra4 The passed pawn on b5 will quickly become a dangerous weapon 30.Rb8 (30.Rc6 Nc1 31.Rc8 Kf7+–) 30...Kf7 31.b6 Ra1 32.Kf2 Nc5 33.Nd4 (33.Ra8 Ke6+=) 33...Ne4 (33...Rb1 34.c4+=) 34.Ke3+– Nc3 35.b7 Rb1 36.Kd3 (36.Nc6 Nd5 37.Ke4 Nc7 38.Na5 Kg6+–) 36...Nd5 (36...Na2 37.Kc4 Kg6 38.Nb5+–) 37.Nc6 (better 37.Rd8!? Nf4 38.Ke4 Rb7 39.Kf4+–) 37...Nb4=+ 38.Nb4 White is in command 38...Rb4 39.Kc3 Rb6 (better 39...Rb1=+) 40.Kc4 a4 41.Kc5 Rb2 42.Kc6 Rg2? (better 42...Rc2 43.Kb5 Rb2 44.Ka4 h5+–) 43.Ra8 Rb2 44.Ra4 Rb7 45.Kb7 g5 46.Kc6 Kg6 (46...Ke6 47.Re4 Kf5 48.Kd5+–) 47.Kd5 h5 (47...Kf7+–) 48.Ke4 f5 49.Kf3 (49.Ke5 g4 50.hg4 fg4+–) 49...g4 (49...h4+–) 50.hg4 hg4 51.Kf4 g3 52.Kg3 Kg5 53.Kf3 Kg6 54.Kf4 Kf6 55.Ra5 (55.Ra6 Ke7 56.Kf5 Kd7 57.Ke5 Ke7 58.Ra7 Kd8 59.Rf7 Ke8 60.Ke6 Kd8 61.Rg7 Kc8 62.Kd6 Kb8 63.Kc6 Ka8 64.Kb6 Kb8 65.Rg8) 55...Ke6+– 56.Rf5 Kd6 57.Re5 Kc6 58.Ke4 Kd6 59.Kd4 Kc6 60.Rd5 Kb6 (60...Kc7 61.Kc5 Kb7 62.Rd7 Kc8 63.Kc6 Kb8 64.Rd8 Ka7 65.Rc8 Ka6 66.Ra8) 61.Rc5 Ka7 (61...Ka6 62.Kd5 Kb6 63.Kd6 Kb7 64.Rb5 Ka6 65.Kc6 Ka7 66.Ra5 Kb8 67.Ra6 Kc8 68.Ra8) 62.Rc6 (62.Rb5 Ka6 63.Kc5 Ka7 64.Kc6 Ka6 65.Re5 Ka7 66.Re8 Ka6 67.Ra8) 62...Ka8 (62...Kb8 63.Kc5 Kb7 64.Kd6 Kb8 65.Rb6 Ka8 66.Kd7 Ka7 67.Kc7 Ka8 68.Ra6) 63.Rc7 (63.Rb6 Ka7 64.Kc5 Ka8 65.Kc6 Ka7 66.Kc7 Ka8 67.Ra6) 63...Kb8 64.Re7 Kc8 65.Kd5 Kd8 66.Kd6 Kc8 67.Rd7 (67.Kc6 Kb8 68.Re8 Ka7 69.Rd8 Ka6 70.Ra8) 67...Kb8 68.Rc7 Ka8 69.Kc6 Kb8 70.Kb6 Ka8 71.Rc8 1–0. lindsey000 – uncle_slim, gameknot.com, 2017.

3.a4 e5

4.Ba3 d6 (4...Ba3 5.Ra3 Nf6 6.Nf3=+) 5.e4= g6 (5...Nf6 6.Nc3=) 6.Nf3+= Nf6 7.Bd3 (7.Bc4 Bg7=) 7...Bg7 (7...Nbd7 8.Nc3=) 8.0–0 (8.Nc3 0–0=) 8...0–0 9.Nc3 (9.Bc4 Bb7 (worse 9...Ne4 10.Bd5 Nc5 11.Ba8+–) 10.d3 Nbd7=) 9...Bb7 10.Re1 (10.h3 Nbd7=) 10...Re8 (10...Nbd7 11.Bc4=) 11.Ng5 (11.Bc4 Ne4 12.Ne4 d5 13.Bd5 Bd5=+) 11...Nh5 (11...h6 12.Nf3=) 12.h4 (12.Nf3 Nf6=) 12...h6 13.Nf3 d5 (13...Nd7 14.Bc4=) 14.g4 (better 14.Nd5!? Nf4 15.Nf4 ef4 16.Bc4 Be4 17.d4+–) 14...Nf4=+ 15.Bf1? (15.ed5!? Qc8 16.Nh2=+) 15...Qd7 (15...Nd7 16.g5 hg5 17.Ng5–+) 16.Nh2–/+ d4 (16...de4 17.Ne4 Qd5 18.g5–/+) 17.Ne2 Be4?? (17...Ne6 18.Ng3–/+) 18.d3?? (better 18.Nf4 ef4 19.Re4 Re4 20.Qf3+–) 18...Bb7 (18...Ne2!? 19.Qe2 Bd5–/+) 19.Nf4 ef4 20.Bg2 (20.Re8 Qe8 21.Bg2 Bg2 22.Kg2 Nd7–/+) 20...Re1–/+ 21.Qe1 Bg2 22.Kg2 Bf6 (22...Qd5 23.Qe4 Qe4 24.de4–/+) 23.f3 (better 23.Qe4 c6 24.Re1+=) 23...Qd6?? (better 23...Qe6–/+) 24.Bd6 (24.Qe8 Kg7 25.Bd6 cd6+–) 24...cd6 25.Qe4 (better 25.Qe8!? Kg7 26.Qc8 Ra7 27.Qb8 Re7 28.Qb6 Re2 29.Kh3 Rc2+–) 25...Ra7 26.Qe8 (26.Qe8 Kg7 27.Qb8+–) 1–0. Mueller,Gerard – Ritschel,Stephan, ESC, 2000.

4.Bb2 d6 5.Nf3 Nf6 6.g3 Nbd7 7.Bg2 Bb7 8.0–0 Be7.

4.Bb2 e4!?= 5.Nh3 Nf6 6.g3 Be7 7.Bg2 0–0 8.Nc3 d5.

4.Bb2 f6 5.e4+/– (5.Nc3 d5 6.e4 Ne7 7.ed5 Nd5 8.Qf3 Nb4) 5...Bb7 (5...Ne7 6.Qh5 g6 7.Qf3 Bg7 8.Bc4 d6) 6.Nc3 Bc5 (6...Ne7 7.Bc4+– (7.Qh5 g6 8.Qh4 Bg7) 7...Nc8 8.Qg4 Nd6) 7.Bc4 Ne7 8.Nh3 (8.Qg4 Kf8+/–; 8.Qh5 g6) 8...Bd4 9.Qg4 g6 (9...Kf8 10.Ba3 d6 11.0–0+=) 10.0–0 (better is 10.Ba3+/–) 10...Bc3 (10...Kf8 11.Kh1 d5 12.ed5+/–) 11.Bc3 (better is 11.dc3!? Nc8 12.f3+–) 11...d5+/– 12.f4 (12.ed5 Bd5 13.Bd5 Qd5+/–) 12...dc4 (12...h5 13.Qh4 dc4 14.fe5+–) 13.fe5+= 0–0?? (13...f5 14.ef5 Nf5 15.Rf5 gf5 16.Qh5 Ke7+/–) 14.Qe6+– Kh8 (14...Rf7 15.Ng5!! Bd5 16.Nf7 Be6 17.Nd8 fe5 18.Ne6 Nd7+–) 15.ef6 Nd5 (15...Qd4 16.Bd4 Nf5 17.ef5 c5 18.f7 cd4 19.Qe5) 16.f7 Nc3 17.Qe5 (17.Qe5 Qf6 18.Qf6; 17.dc3?! Qd6 18.Qd6 cd6+=) 1–0. guest569 – guest1075, ICC, 2003.

4.Nc3+= Bb7 5.Nf3 e4 6.Nd4 Nf6 7.e3 c5 8.Nf5 g6.

4.Nc3+= d5 5.Nf3 d4 6.Ne4 f5 7.Ng3 e4 8.Ng1 Nf6.

4.Nc3+= Nf6 5.Nf3 Bd6 6.e3 Bb7 7.Bc4 0–0 8.0–0 Qe7.

4.c4 Bb7 5.Ba3 (5.Bb2 e4=) 5...c5 (5...Ba3 6.Ra3 Nf6 7.Nf3=+) 6.bc6= Nc6 7.Bf8 Kf8 8.Nc3 Nd4 (8...Rc8 9.Nf3=) 9.Nb5 (9.Rb1 Ne6+=) 9...Ba6 (9...Nb5!? 10.cb5 Rc8=) 10.e3 Nf5 (10...Nb5 11.cb5 Bb7 12.d4=) 11.e4 (11.Qb1 Nh4+=) 11...Nh4 (11...Bb5 12.ab5 (worse 12.ef5 Bc6=+) 12...Nd6 13.d3+=) 12.Qg4 (12.Rb1 Nf6 13.f3 Bb5 14.Rb5 d6+=) 12...Ng6 13.Ra3 (13.Rb1 Nf6 14.Qf3 Rc8=) 13...Nf6 14.Qe2 (14.Qf3 Rc8=) 14...Rc8 15.Rg3 (15.Rb3 Nf4 16.Qf3 Ne6=) 15...Nf4 16.Qe3 Qe7 (better 16...Bb5 17.ab5 N6h5 18.Qa3 Qe7=+) 17.Nf3 (17.Qb6 Bb5 18.Qb5 Ne4 19.Qb7=+) 17...Bb5–/+ 18.ab5 a4 (better 18...Qb4!? 19.Bd3 Qb5–+ (19...Nd3 20.Qd3 Ne4 21.Qd7 Qb1 22.Ke2 Ng3 23.fg3 Qe4 24.Kf2 Qc4 25.Ne5–/+)) 19.Nh4=+ (19.Qb6? Qa3 (19...Ne4?! 20.Qb7 Nd6 21.Qa6=+) 20.Be2 Rc4–+) 19...Qb4 20.f3? (better 20.Qa3 Qa3 21.Ra3=+) 20...a3–+ 21.Bd3? (21.Kf2 a2 22.Be2 Ne2 23.Ke2 Qc4 24.Kf2 Qb5 25.Ra1–+) 21...a2 (21...Qb3 22.Be2 Qb1 23.Kf2 Qh1 24.Qa3 Rc5 25.Qa7–+) 22.0–0 (22.Kf2 Ra8 23.Ra1 Qb2 24.Ra2 Ra2–+ (24...Nd3?! 25.Qd3 Qa2 26.Qd6 Kg8 27.Nf5=)) 22...Ra8 23.Ra1 Qb2 24.Ra2 Ra2 25.Kf2 (25.Bf1–+) 25...Qc1 26.Rg7 Rd2 27.Kg3 N6h5 28.Kg4 Ng7 29.Qb6 Rd3 (29...h5 30.Kg5 Nfe6 31.Kf6 Rh6 32.Ng6 Rg6 33.Ke5 Qc3 34.Kd6 Rd3 35.Qd4 Qd4) 30.Qd8 Ne8 31.Nf5 Rg8 (31...h5 32.Kh4 Ng2 33.Kh3 Rf3 34.Ng3 Nf4 35.Kh4 Ng6 36.Kh3 Qf1) 32.Kh4 (32.Ng7 Rg7 33.Qg5 Rg5 34.Kg5 Ng2 35.Kg4 Qf4 36.Kh5 Nf6) 32...Qe1 (32...Ng2 33.Kh5 Nf4 34.Kh6 Ne6 35.f4 Qf4 36.Kh7 Rh3 37.Nh4 Qh4 38.Qh4 Rh4) 33.g3–+ Ng6 34.Kh5 Qh1 35.h4 Rf3 36.Nd6 Kg7 (36...Qd1 37.Qe8 Kg7 38.Qg8 Kg8 39.Kg5 Rg3 40.Kh6 Nh4 41.c5 Rg6) 37.Qf6 Nf6 38.Kg5 Rg3 (38...Qc1) 39.Kf5 Qf1 (39...Qf3) 0–1. afsharian (1665) – nicolauarcas, lichess.org, 2017.

4.c4 Nf6 5.e3 d5 (5...Bb4 6.Bb2 e4 7.f3=+) 6.Nc3 (6.Bb2 Nbd7=) 6...dc4 (6...d4 7.Qf3 c6 8.Ne4 de3 9.fe3 Ne4 10.Qe4=+) 7.Bc4= Bb4 8.Qb3 (8.Nf3 Bc3 9.dc3 Qd1 10.Kd1 Nbd7=) 8...0–0 9.Ba3 (9.Nf3 Nbd7=) 9...Qe7 (9...Bb7 10.Nf3 (10.Bb4? ab4 11.Nf3 bc3 12.Qc3 Bf3 13.gf3 Qd6–+) 10...Ba3 11.Ra3 Bf3 12.gf3=+) 10.Bb4 (10.Nd5 Nd5 11.Bd5 Ra7=) 10...ab4 11.Nd5 Nd5 12.Bd5 Be6 (12...Ra5 13.Rc1=) 13.Be6+= fe6 14.Nf3 e4 (14...c5 15.bc6 Nc6 16.Rc1+=) 15.Nd4+– Attacks the isolani on e6 15...Qf6 (15...Qf7 16.Qe6 Nd7 17.f3+–) 16.Qe6 (16.0–0 Nd7+–) 16...Kh8 (16...Qe6 17.Ne6 Rf7 18.Ke2+–) 17.Qf6 (17.0–0 Qe6 18.Ne6 Rc8+–) 17...Rf6+– 18.0–0 (18.Ke2 Nd7+–) 18...Nd7 (18...c5 19.bc6! Nc6 20.Rfb1 Nd4 21.ed4+–) 19.Rfc1 Raf8 (19...Rc8!?+–) 20.f3 (20.Rc7 Ne5+–) 20...h5 (better 20...ef3 21.Nf3 Nc5+–) 21.Rc7 ef3 (21...Ne5 22.fe4 Nd3 23.Nb3+–) 22.gf3 (better 22.Rd7!? fg2 23.Nb3 Kg8+–) 22...Ne5 23.f4 Nd3 24.a5 (better 24.Rd7 Kg8+–) 24...g5?? (better 24...Rg6 25.Kf1 Nf4 26.ef4 Rf4 27.Ke2 Rd4+–) 25.f5 (25.fg5 Rg8 26.h4 ba5 27.Ra5 Rfg6+–) 25...g4 (25...ba5 26.Ra5 b3+–) 26.ab6 Rb6 27.Raa7 Rh6 28.b6 g3 29.b7 gh2 30.Kh2 Nf2 31.b8Q! Ng4 (31...Rb8 32.Kg2 Combination) 32.Kg1 (32.Kg3 Rb8 33.Kh4 Ne5+–) 32…Kg8 1–0. afsharian – AlekseYzzz, lichess.org, 2018.

4.e3 c6 5.c4 (5.Bb2 Qc7=) 5...Bb4 6.Bb2 Qe7 (6...d6 7.f4 f6 8.Qh5 g6 9.Qh4=) 7.Nc3 Nf6 8.Qf3 (8.Na2 0–0=) 8...Bb7=+ 9.e4 Bc3 (9...0–0 10.Nge2=+) 10.Qc3= d6 11.Qe3 cb5 12.cb5 Opening the c–file gets Black a lot of play (12.ab5 Ne4 13.Qb6 Nc5 14.Ra5 Na4 15.Ra8 Nb6 16.Rb8 Nc8–/+) 12...Nbd7 13.f3 Rc8 14.Bd3 (14.d4 0–0=) 14...Nc5 (14...d5–/+) 15.Bc4? (better 15.Be2!?=) 15...Nce4!–/+ 16.d3 (16.Qe4 Ne4) 16...Nc5 17.d4 Ncd7 18.Rc1 0–0 (18...ed4 19.Bd4 Nc5 20.Ra1–+) 19.Ne2–/+ Rce8 (better 19...Bd5 20.Bd3 Rc1 21.Nc1 Qe6–/+) 20.g4?? (better 20.0–0=+) 20...Ng4!–+ 21.d5 (21.fg4 Exploits the pin 21...Bh1) 21...Ne3 22.Rc3 Bd5 (better 22...Qh4 23.Ng3 Nc4 24.Bc1–+) 23.Re3 Bc4 24.h4 h5 (24...Nc5 25.Ba1–+) 25.f4 Nc5 26.Ba3 Qf6 27.fe5 Re5 28.Bb2 Nd3 29.Rd3 Bd3 30.Be5 Qe5 (30...Qe5 31.0–0 Qe2 32.Rf2 Qe1 33.Kg2 Be4 34.Rf3 Qe2 35.Kg1 Qf3 36.Kh2 Qg2) 0–1. hamiltonharris (1840) – Eglantine (1850), ChessWorld.net, 2014.

4.e4 c5 5.c4 (5...Nf6 6.Nf3=). Conveyor – Ruthless Rook, ChessWorld.net, 2005.

4.Nf3 e4 5.Nd4 Bc5 6.Bb2 Nf6 7.Nf5 0–0 8.e3 d5 9.Ng7? (better 9.Nd4=+) 9...Kg7–+ 10.Qh5 d4 11.Qg5 Kh8 12.ed4 Bd4 13.Bd4 Qd4 14.c3 Qd6 15.g3 Rg8 16.Qe3 Bg4 17.Bg2 Bf3 (better 17...Nbd7!?–+) 18.Bf3 ef3 19.Qf3 Re8 (19...Nbd7 20.d4–+) 20.Kd1 Nbd7 21.Na3 (21.d4 c5 22.bc6 Ne5–+) 21...Ne5 (21...Ne4!? 22.d4 Qd5 23.Kc2–+) 22.Qf5 Rad8 The mate threat is Qxd2 23.d4 c5! 24.bc6 (24.Nc2 Nd5 25.Kc1 cd4–+ (25...Nc3?! 26.de5 Qd2 27.Kb2–+)) 24...Nc6 (better 24...Qc6 25.Re1 Neg4–+) 25.Nc4?? (better 25.Nb5 Qe7 26.Ra2–+) 25...Qe7 (better 25...Nd4 26.Qh7 Kh7 27.Nd6 Rd6 28.Ra2 Ne2 29.Kc2–+) 26.Kc2 Qe4 (better 26...Qe2 27.Kb3 Ne4–+) 27.Qe4=+ Ne4 28.f4?? (28.f3 Nd4 29.cd4 Rd4 30.Nb6 Re6 31.fe4 Rc6 32.Nc4 Rcc4 33.Kb3 Re4=+) 28...Rb8 (28...Nd4!? 29.cd4 Rd4–+) 29.Rhb1 (29.Rhe1 Rbc8 30.Re4 Re4 31.Nd6 Nd4 32.Kd3–/+) 29...Nf2?? (29...Rbc8 30.Kb3–/+) 30.Rb5 (better 30.Rb6 Rb6 31.Nb6+=) 30...Re2–/+ 31.Kb3 Na7 (better 31...Ne4!?–/+) 32.Rb6= Rb6 33.Nb6 Nd3 (33...Ne4!?=) 34.Nc4+– Rh2 35.Na5 (better 35.Rd1!? Nf2 36.Rd2+–) 35...Rg2= 36.f5 Rg3 37.Rf1 h5 38.Nc4 h4 39.f6 h3 40.Rf5? (40.Nd6!? Kg8 41.Nf5=) 40...Kg8 (40...Kh7 41.Nd2 Kg6–+) 41.Rh5? (better 41.Nd6–/+) 41...Nf2?? (better 41...Nf4!? 42.Rh4 Nd5–+) 42.Nd2? (42.Nb6 Nc6 43.Kc4 Na5 44.Kb5 Ne4+=) 42...Rg2 (42...Rg6!?–/+) 43.Nf3=+ Rg6 44.Ng5 Rf6 45.Nh3 Nh3 46.Rh3 Rb6 47.Kc4 f5 (47...Kf8 48.d5=) 48.Rf3+= Rf6 49.Rf4 Kg7 50.d5 Nc8 51.Kc5 Kg6 52.a5 Kg5 53.Rd4 (53.Rf1!?=) 53...f4=+ 54.d6 Nd6 (better 54...Rf5!? 55.Kc4 Nd6 56.Rd6 f3–/+) 55.Rd6= Rd6 56.Kd6 f3 57.a6 f2 58.a7 f1Q 59.a8Q Qf6 60.Kd7 Qf7 61.Kd6 Qf6 62.Kd7 Qf7 63.Kd6 Qf6 64.Kd7 Qf5 ½–½. peteywheatstraw – ivanchess (1615), gameknot.com, 2015.

4.Nf3 e4 5.Nd4 Bc5 6.e3 Bd4 7.ed4 Qf6 8.Bb2 Bb7.

3.a4 e6

4.Bb2 Nf6 5.e3 Bb7 6.Nf3 c5 7.Be2 d5 8.c4 Nbd7 9.d3 Bd6 10.0–0 0–0 11.Nbd2 Qc7 12.h3 Rfe8 13.d4 (13.Qc2 Ne5=) 13...Rac8 14.Rc1 Qb8 15.Qb3 (15.cd5 Bd5 16.Nc4 Red8=) 15...Ne4 (15...cd4 16.ed4 Ne4 17.Rc2+=) 16.Rc2 Ndf6 17.Rfc1 Red8 18.Ne4 Ne4 19.Ba1 (19.cd5 Bd5 20.Bc4 Bb7=) 19...cd4 (19...h6 20.Rd1+=) 20.Qb2 (better is 20.Bd4!? Nc5 21.Qa2+=) 20...Nc3–/+ 21.ed4 (21.Nd4 Na4 22.Qb1 Nc5–/+) 21...Ne2–+ 22.Re2 Rc4 23.Rc4 dc4 24.d5 e5 (better is 24...Bf8!? 25.de6 fe6–+) 25.Ne5+= ½–½. Souza,Kim Garcia De (1740) – Pereira,Everaldo Cordeiro (1990), Floripa Open, 2015.

4.Bb2 Nf6 5.e3 Bb7 6.Nf3 Be7 7.Be2 0–0 8.0–0 c6 9.c4 cb5 10.ab5 The passed pawn on a5 will become decisive later 10...d5 11.Nc3 (11.Na3 Nbd7=) 11...Nbd7 12.cd5 Nd5 13.Nd5 Bd5 14.d4 Bb4 15.Ne5 (15.Bd3 Qe7=) 15...Ne5 16.de5 Rc8 17.Bd4 Bc5 18.f4 Rc7 19.Rc1 Bd4 (19...Qc8 20.Qd2+=) 20.ed4 (20.Qd4 Rc1 21.Rc1 Qa8=) 20...Rc1+= 21.Qc1 Qa8 22.Bf3 (22.Rf2!?+=) 22...Bf3–/+ 23.Rf3 Rc8 (23...Qe4!?–/+) 24.Rc3+= The mate threat is Rxc8 24...Rc3 25.Qc3 a4 26.Qc6 Do you see the mate threat? 26...Qb8 (26...Qd8 27.Qc3+=) 27.f5 (27.Qc4 a3 28.Qa4 Qd8=) 27...a3+= 28.fe6 a2 29.ef7 (29.Qc1!? fe6 30.Qa3=) 29...Kf8–/+ 30.Qc3 Qa8 31.Qb4?? (better is 31.Qa1 Qa4 32.e6–/+) 31...Kf7–+ (31...Kf7 32.Qc4 Ke7 33.Qc7 Kf8 34.Qd6 Kg8–+) 0–1. Hirt,Robert – Wartig,Wolfgang, corr DDR–HUN, 1984.

4.Bb2 Nf6 5.Nf3 d6 6.e3 Bb7 7.Be2 Be7 8.0–0 0–0 9.d3 c5 10.c4 Nbd7 11.Qc2 Rc8 12.Nbd2 h6 13.Rad1 Qc7 14.Rfe1 Ng4 15.h3 Nge5 16.Ne5 Ne5 17.f4 Nd7 18.Bf3 Bh4 19.Bb7 Be1 20.Bc8 Bd2 21.Qd2 Rc8 22.Qe2 Nf8 23.e4 e5 24.Qg4 Ne6 25.f5 Ng5 (25...Nd4!?+/–) 26.f6! g6 (26...gf6 27.h4 Combination) 27.Bc1 Nh7 28.Qh4 h5 29.g4 hg4 30.Rf1 (worse is 30.hg4 Qd8 31.g5 Kh8+–) 30...Qd8 31.hg4 g5 32.Bg5 1–0. Maly,Guenther (1740) – Maier,Ralf (2005), remoteschach.de, 2008.

4.e3 d5 5.Nf3 (5.Bb2 Bb7=) 5...Qf6 (5...Nf6 6.Bd3=) 6.Ra2 (6.d4 Bd6+=) 6...Nh6 (6...Nd7 7.Bb2 Qh6 8.Bd3=) 7.Bb2+= Qf5 (7...Qg6 8.Ne5 Qf6 9.Bd3+=) 8.Bd3 (8.Be2 Nd7+=) 8...Qh5 9.0–0 (9.Be2 f6+=) 9...Bd6 10.h3 (10.Nc3 f6+=) 10...Nf5 (10...Bb7 11.Nc3= (11.Bg7? Rg8–+)) 11.c4 (11.e4 Ne7 12.e5+= (< 12.Bg7 Rg8 13.e5 Rg7 14.ed6 Qh3–+)) 11...e5? (better is 11...Bb7=) 12.Ne5+– Qd1 13.Rd1 f6 14.Nf3 Bc5? (14...Be6 15.Rc1 Ne7+–) 15.cd5 0–0 16.Ba3 (16.Bf5 Bf5 17.d3 Bg6+–) 16...Bd6 17.Bd6 cd6 18.Nc3 g5 19.Ne2 h5 20.Nfd4 Nh4 21.g3 Re8 22.gh4 Bh3 23.Bf5 g4 24.Ne6 Nd7 25.Nc7 Re5 26.Be6 Re6 27.de6 Rc8 28.ed7 Rd8 29.Nd5 Kf7 30.Nb6 Rb8 31.Rc1 Ke7 32.Rc8 Rc8 33.dc8Q Kf7 34.Qd7 Kg6 35.Nf4 (35...Kh6 36.Qf7 Bg2 37.Qg6#) 1–0. kostovist – jordan2delta, internet, 2006.

4.e3 Nf6 5.g3 (5.Bb2 Bb7=) 5...Bc5 (5...Bb7 6.Nf3=+) 6.Bg2 (6.Qf3 d5=+) 6...d5 7.d4 (7.Ba3 Ba3 8.Na3 0–0=+) 7...Bb4= 8.c3 Bd6 9.f4 (9.c4 0–0=) 9...h5 (9...0–0 10.c4–/+) 10.Qd3 h4 11.e4 (11.c4 hg3 12.hg3 Rh1 13.Bh1 c6=) 11...de4 12.Be4 Ng4?? (better is 12...Ne4 13.Qe4 Ra7=+) 13.Ba8+– hg3 (13...Nf6 14.Ne2+–) 14.hg3 Rh1 15.Bh1 g6 16.Qf3 f5 17.Qa8 Nd7 18.Bc6 Kf7 19.Bd7 Qd7 20.Qc6 Qd8 21.Nd2 g5 22.Nc4 gf4 23.Nd6 cd6 (24.Bf4 e5 25.de5 de5+–). riverborne – bigsteel, Caissa.com, 2004.

4.e4 Nf6 5.e5 Ne4 =.

4.Nf3 Be7 5.Bb2 Bf6 6.d4 Ne7 7.g3 0–0 8.Bg2 Bb7 9.0–0 c6 10.c4 d5 11.Na3 c5 12.e3 cd4 13.ed4 dc4 14.Nc4 Bd5 15.Nce5 Be5 16.Ne5 Bg2 17.Kg2 Qc7 18.Rc1 Qb7 19.Kg1 Nd7 20.Nc6 Nf6 21.Re1 Ned5 22.h4 h6 23.Re5 Rad8 24.Qf3 Qd7 25.g4 Qd6 26.g5+/– Nd7 27.Re4 hg5 28.hg5 Ne7?? 29.Rh4 Nc6?? 30.bc6 Rc8 31.Qh5 f6 32.g6 (32.g6 Qh2 33.Rh2 Rc6 34.Qh7#) 1–0. sacaniev – politis, kurnik, 2012.

4.Nf3 Nf6 5.g3 Bb7 6.Bg2 Be7 7.0–0 0–0 8.c4 c6 9.Bb2 cb5 10.cb5 d5 11.Ne5 Nbd7 12.Na3 (12.Nc6 Bc6 13.bc6 Nc5=) 12...Ne5=+ 13.Be5 Rc8 14.Nc2 Bd6 15.Bc3 (15.Bd6 Qd6 16.d4 Rc3=+) 15...g6 (15...Ne4 16.Bd4=+) 16.Nd4 (16.f4 Ne4 17.Bd4 Rc4=) 16...Qd7 (16...Ne4 17.Bb2=+) 17.Rc1 (17.Nf5 Rc3 18.Nd6 Rc7 19.Nb7 Rb7=) 17...e5=+ 18.Nb3 d4 19.Bb2 Bg2 20.Kg2 Qb7 21.Kg1 Rc1 22.Qc1 Rc8 23.Qb1 Rc7 24.d3 Qc8 25.Nd2 Bb4 26.f4?? Bd2–+ 27.fe5 Be3 28.Kg2 Qb7 29.Kh3 Nd5 30.Ba3 Nc3 31.Qb3 Qc8 32.Kg2 Qb7 33.Rf3?? Nd5 34.Bd6 Rc3 35.Qa2 Bh6 36.e6? fe6 37.Qa1 Ne3 38.Kg1 Nf5 39.Bf4 Qc8 40.Qa2 Qd7 41.Qd2 Bg7 42.g4 e5 43.gf5 ef4 44.Qf4 Qf5 45.Qb8 Rc8 46.Qb6 Qg4 47.Kf2 Qh4 48.Kg2 Re8 49.Rf2 Bh6 50.Qc6 Qg4 51.Kh1 Rc8 52.Qd5 Kh8 53.Qg2 Rc1 ½–½. yaunootz – fantom, internet, 2006.

3.a4 Nf6

4.Bb2 e6 5.e3 Bb7 6.Nf3 Be7 7.Be2 d5 8.d3 0–0 9.0–0 Nbd7 10.Nbd2 Rc8 11.c4 Re8 12.Nd4 c5 13.N4b3 (13.bc6 Bc6 14.Nc6 Rc6=) 13...e5 (13...Qc7 14.Qc2+=) 14.cd5 Nd5 15.Nc4 Bf8 (15...Qc7 16.Bg4 N5f6 17.Bf3=) 16.Bg4 N5f6 17.Bd7 Nd7 18.Nbd2 Qc7 19.e4 Rcd8 20.Qf3 Re6 21.Rad1 Bc8 22.Qe3 Be7 23.f4 (23.Qg3 Qb8=) 23...ef4 24.Qf4 (24.Rf4? Bg5 25.g3 Nf8–+) 24...Qf4 25.Rf4 Bg5 26.Rg4 Bd2?? (better is 26...Bf6=) 27.Rg7+– (27.Nd2?! Ne5 28.Rg3 A) 28...Nd3? 29.Nc4+– (29.Rg7?! Kf8 30.Ba1 Rd7+=; 29.Bg7?! Rg6 30.Bf6 Rd6 31.Rg6 hg6+=); B) 28...h5 29.Be5 Re5=) 27...Kf8 28.Rd2 Rh6 (28...Nf6 29.Bf6 Rf6 30.Rh7+–) 29.Rg3 (29.Rf2 f6 30.Rd7 Rd7 31.Nb6 Rd3 32.Nc8 Rd8+–) 29...Rg6 (29...Ke7 30.Rf3+–) 30.Rf3 (30.Rg6 hg6 31.d4 Ke8+–) 30...Ke7 31.Rdf2 Rf8 32.Ba3 (32.d4 Rg4 33.Rf4 Rf4 34.Rf4 Bb7+–) 32...Bb7 33.Rf4 f6? (33...Re6 34.d4 Be4 35.Nb6 Nb6 36.Bc5 Kd8 37.Bf8 Na4 38.Rf7+–) 34.Bb2 (better is 34.Nb6 Rg5 35.Nc4+–) 34...Ke6 35.Bc3 Rfg8 36.Nb6! Nb6 37.Rf6 Ke7 (37...Kd7 38.Rf7 Kc8 39.Ba5 Na4 40.Rh7 Rd6+–) 38.Rf7 Ke6 39.Rb7 Na4 40.Ba5 Ke5 (40...Ra8 41.Be1 Rf6 42.Rh7 Rf2 43.Bf2 Ra5+–) 41.Re7 Kd4 42.Rd7 (42.Rd7 Ke5 43.Rff7+–) 1–0. Olsen,Birger – Njaa,John Olav, Vadsosjakken–B, 2004.

4.Bb2 g6 5.Nf3 (5.g3 Bb7 6.Nf3 Bg7=) 5...Bg7 (5...d5 6.Bf6 ef6 7.e3=) 6.e4 d6 7.c4 (7.Bc4 Nbd7=) 7...0–0 (7...Nbd7 8.Be2=+) 8.Qc2 Bb7 9.d3 Nh5 (9...Nbd7 10.Be2=+) 10.Bg7 Ng7 (10...Kg7 11.Nc3=+) 11.d4= e5 (11...Nd7 12.Be2=) 12.de5 de5 (12...Nd7 13.Nc3=) 13.Be2 (13.Nc3 Nd7=) 13...Nd7 14.Nc3 Nc5 (14...Ne8 15.0–0=) 15.0–0 Qe7 (15...Qf6 16.Nd5 Bd5 17.cd5=) 16.Nd5 Bd5 (16...Qd6 17.Rfd1=) 17.cd5 (worse 17.ed5 Nf5 18.Qc3 Rae8–/+) 17...Rad8 (17...Ne8 18.Rfe1=) 18.Nd2 Ne8 19.Nc4 Nd6 (19...f5 20.f3=) 20.Na5+= Ra8 (20...ba5 21.Qc3 Double attack (21.Qc5 Discovered attack; 21.Qc5 Deflection; 21.Qc3 Decoy; 21.Qc5 Overloading)) 21.Nc6+– (21.Nc6 Qh4 22.f4+–) 1–0. Louro,Eugenio (2210) – Silva,Lucas, FICGS, 2007.

4.Nf3 Bb7 5.Bb2=.

4.Nf3 g6 5.e3 Bg7 6.Be2 (6.d4 0–0=) 6...Ne4 (6...c5 7.0–0=) 7.d4 (7.Ra2 Bb7=) 7...0–0 (7...Bb7 8.0–0+=) 8.0–0 (8.Bb2 d5=) 8...Bb7 (8...c5 9.bc6 dc6 10.Bb2=) 9.Bb2+= c5 (9...h6 10.Nbd2+=) 10.Nbd2 (10.bc6 Nc6 11.Nbd2 d5+=) 10...d5 11.c4 (11.Ne4 de4 12.Ne5 Qc7=) 11...Nd7 (11...Nd2 12.Nd2 cd4 13.Bd4+=) 12.cd5 Bd5 13.Ne4 Be4 14.Qb3 (14.Nd2 Bd5=) 14...Rc8= 15.Ng5 (15.Rac1 cd4 16.ed4 Rc1 17.Rc1 Bh6=) 15...Bb7 (15...Ba8 16.Bc4 e6 17.Nf7 Kf7 18.Be6 Ke8 19.Rad1=+) 16.Bc4 (16.Rac1 e5 17.Bf3 cd4 18.Bb7 Rc1 19.Bc1 Qg5 20.ed4 Qf5 21.de5 Nc5=) 16...e6=+ 17.Nf7 (17.f4 h6 18.Nf7 Kf7 19.Be6 Ke8=) 17...Kf7 18.Be6 Ke7 (18...Ke8 19.Rad1 c4 20.Bc4=+) 19.Rad1 White prepares d5 (19.Rfd1 Be4 20.Rac1+–) 19...c4 (better 19...Qc7!? 20.d5 Be5 21.Be5 Qe5=) 20.Bc4+– Ke8 21.f4 (21.e4+–) 21...Nf6? (21...Qe7!?=) 22.d5 (22.Ba3!?+–) 22...Qd7+– 23.d6 (23.Ba3 Rh8+–) 23...Qg4+= 24.Rd2 Ne4?? (better 24...Kd7+=) 25.d7+– (25.d7 Ke7 26.dc8R (26.Bg7?! Nd2 27.Bf8 Kd7 28.Qd3 Ke8 29.Qd2 Rc4+–) 26...Nd2 27.Ba3 Kd7 28.Be6 Qe6 29.Rc7 Kc7 30.Qe6+–) 1–0. DEFFM – GuestJKFM, freechess.org, 2018.

3.a4 h5

4.c4 Bb7 5.d4 (5.Nf3 e6 (5...Nf6 6.d4 e6 7.e3 h4 8.Ba3 Ne4 9.Bf8=) 6.d4 Bb4 7.Bd2 Bf3 8.ef3 Qf6 9.Bb4=; 5.Nc3 e6 (5...Nf6 6.Nf3 e6 7.Bb2 Bb4 8.e3 h4 9.Na2=) 6.e4 Bb4 7.Bb2 Nf6 8.f3 0–0 9.Na2=; 5.Bb2 e6 (5...Nf6 6.Nf3 e6 7.e3 Bb4 8.Be2 h4 9.h3+=) 6.Nf3 Nf6 7.e3 Be7 8.Bf6 Bf6 9.d4=) 5...Nf6 (5...e6 6.Nf3 h4 7.e3 Qf6 8.Be2 h3 9.g3=) 6.Nf3 e6 7.e3 h4 8.Ba3 Ba3 9.Na3 =.

4.c4 d6 5.e4 (5.Nf3 e5 (5...Nf6 6.d4 Bb7 7.e3 e6 8.Be2 Be7 9.0–0+=) 6.Nc3 Nf6 7.e4 h4 8.d4 ed4 9.Qd4+=; 5.Nc3 e5 (5...Nf6 6.Nf3 e5 7.e4 h4 8.d4 ed4 9.Qd4+=) 6.Nf3 Nf6 7.e4 h4 8.d4 ed4 9.Qd4+=; 5.d4 e5 (5...Nf6 6.Nf3 Bf5 7.Nc3 e6 8.d5 e5 9.Ng5+=) 6.de5 de5 7.Qd8 Kd8 8.Nf3 Bd6 9.Bb2+=) 5...e5 (5...Nf6 6.Nc3 e5 7.Nf3 h4 8.d4 ed4 9.Qd4+=) 6.Bb2 (6.Nf3 Nf6 7.Nc3 h4 8.d4 ed4 9.Qd4+=) 6...g6 (6...Nf6 7.Nc3 Be7 8.Nf3 Bb7 9.d4+=) 7.Nf3 (7.d4 Bg7 8.de5 Be5 9.Be5+/–) 7...Qe7 (7...Bg7 8.Be2 Nf6 9.Nc3+=) 8.Be2 (8.d4 ed4 9.Qd4+=) 8...Nh6 (8...Nf6 9.Nc3+=) 9.d3 (9.d4+/–) 9...f5 10.Qb3 f4 (10...Nd7 11.Nc3+=) 11.Nbd2 (better is 11.Nc3!? Be6 12.Nd5 Bd5 13.cd5+/– (worse is 13.ed5 Nd7+=)) 11...g5= 12.Qc3 g4 13.Ne5 de5 (13...Qe5? 14.Qc2 Qe7 15.Bh8+–) 14.Qe5 Qe5 15.Be5 Rh7 16.Bf4 Bd6 17.Bd6 cd6 18.d4 Nd7 19.d5 (better is 19.h3!? Nf6 20.hg4 hg4 21.Rc1+/–) 19...Nc5= 20.0–0 Ng8 21.f3 Bd7 22.fg4 Bg4 23.Bg4 hg4 24.Rf4 Nh6 25.Rf6 (25.h4 Rf7 26.Rf2 Raa7+=) 25...0–0–0 (25...Ke7 26.Rf4 Nd3–/+) 26.e5+= de5 27.Rb6 Nf5 28.Rc6 Rc7 29.Rc7 Kc7 30.Kf2 (30.Re1 Re8 (worse is 30...Na4 31.Re5 Rf8 32.Nb3+/–) 31.Ne4 Na4+=) 30...Nd6 31.Kg3 Nce4 (better is 31...Rf8 32.Kg4 Rf2+=) 32.Ne4+/– Ne4 33.Kg4 Rf8 34.g3 Rf2 (34...Kd6 35.Ra2+/–) 35.h4 (better is 35.Re1 Nc5 36.Re5+–) 35...Rg2?? (35...Rc2 36.Kf5 Ng3 37.Ke6+/–) 36.Ra3 (better is 36.Kf3 Rg3 37.Ke4 Rg4 38.Ke5 Rc4 39.Rh1 Ra4 40.h5+–) 36...Rc2 37.Kf5 Nc5 (37...Nd6 38.Ke6 Nc4 39.Rd3+–) 38.Ke5 (38.h5!? Nd7+–) 38...Rc4 39.d6 Kd7 40.Kd5 (better is 40.Rf3 Ra4 41.Kd5+–) 40...Ra4? (40...Rc1 41.Ra2+/–) 41.Ra4 (better is 41.Re3 Nb7 42.Re7 Kc8 43.d7 Kc7 44.d8Q Kd8 45.Rb7 Rg4+–) 41...Na4 42.g4?? (better is 42.h5!? Nc3 43.Kc4+–) 42...Nc3 (42...Nb6 43.Kc5 Na4 44.Kd4 Kd6 45.g5+=) 43.Kc5 (better is 43.Kc4 Ne4 44.h5 Nd6 45.Kb3+=) 43...Ke6?? (better is 43...Ne4 44.Kc4 Nd6 45.Kc5 Ne4 46.Kd5 Nf6 47.Kd4 Ng4+=) 44.b6+– Na4 45.Kc6 Nb6 46.Kb6 a4 (46...Kd6 47.Ka5 Kd7+–) 47.Kc7 (better is 47.Kc6 Ke5 48.d7+–) 47...a3 48.d7 a2 49.d8Q a1Q 50.Qd7 Ke5 1–0. delightful_porridge – 2buddies, ChessWorld.net, 2016.

4.c4 e5 5.e3 (5.Nc3 Nf6 (5...Bb7 6.Bb2 Bc5 7.e3 Nf6 8.Nf3 e4 9.Ng5=) 6.Nf3 e4 7.Ng5 Bb7 8.Qc2 Qe7 9.d3=; 5.Nf3 e4 6.Nd4 Nf6 7.Bb2 Bb7 8.e3 h4 9.Be2=; 5.Bb2 e4 (5...f6 6.e4 Bb7 7.Nc3 Bb4 8.Nd5 Ne7 9.Be2+=) 6.Nc3 Nf6 7.f3 ef3 8.Nf3 Bb7 9.e3=) 5...Nf6 (5...Bb4 6.Bb2 d6 7.f4 Bb7 8.Nf3 e4 9.Nd4=) 6.Bb2 e4 7.Nc3 Bb4 8.Rc1 Bb7 9.Nh3 =.

4.c4 Nf6 5.Bb2 (5.Nf3 e6 (5...Bb7 6.d4 e6 7.e3 h4 8.Ba3 Bb4 9.Bb4=) 6.d4 Bb7 7.e3 h4 8.Ba3 Ne4 9.Bf8=; 5.Nc3 e5 (5...Bb7 6.Nf3 e6 7.Bb2 Bb4 8.e3 Be7 9.Be2+=) 6.Nf3 e4 7.Ng5 Bb7 8.Qc2 Qe7 9.d3=; 5.d4 e6 (5...Bb7 6.Nf3 e6 7.e3 h4 8.Ba3 Bb4 9.Bb4=) 6.Nf3 Bb7 7.e3 h4 8.Ba3 Ba3 9.Na3=) 5...Bb7 (5...e6 6.Nf3 Bb7 7.e3 Bb4 8.Be2 h4 9.h3+=) 6.Nf3 e6 7.e3 Bb4 8.Be2 h4 9.h3 +=.

3.Bb2 a4

4.a3 Ra5 5.e3 c5 (5...Nf6 6.Nf3+=) 6.c4 Ra8 (6...d5 7.d4 cd4 8.Bd4 dc4 9.Bc4+=) 7.Nc3+/– d6 8.Na4 h5 (8...Bb7 9.Nf3+/–) 9.Nc3 Bg4 10.Be2 Be2 (10...Nf6 11.Nf3+–) 11.Nge2 e5 12.0–0 h4 13.h3 d5 (better is 13...Nf6+–) 14.Nd5 Ne7 15.e4 (15.Ne7!? Qe7 16.d4 Qe6+–) 15...Nd5 16.ed5 Nd7 17.f4 e4 (17...Bd6+–) 18.Nc3 f5 19.d3 g6 (19...e3 20.Qe2 Be7 21.Qe3+–) 20.de4 fe4 (20...Bg7 21.e5 g5+–) 21.Ne4 Rh5 (21...Rh7 22.Qg4 Qe7 23.Rae1+–) 22.Ng5 (better is 22.Qg4 Qe7 23.Qg6 Qf7+–) 22...Nf6 23.Re1 Be7 24.Bf6 Qd6 25.Be7 Qf4 26.Bd6 Kd7 27.Bf4 Rg5 28.Bg5 (28.Bg5 Rf8 29.Qg4 Rf5 30.d6 Kc8 31.Re8 Kd7 32.Rd8 Ke6 33.Re1 Kf7 34.Re7; 28.Qe2 Re5 29.Qe5 Ra3 30.Qe8) 1–0. Fournier,Frederic (2070) – profilactico, Active, 2004.

4.a3 c6 5.c4 cb5 6.cb5 d5 7.Nf3 Nd7 8.e3 (8.Nc3 Nc5+=) 8...Nc5 9.Be2 Nb3 (9...Nf6 10.0–0+=) 10.Ra2 Bf5 11.0–0 (better 11.Nc3+–) 11...Bc2?? (better 11...Bb1 12.Qb1 e6+=) 12.Qc2+– Rc8 13.Nc3 d4 (13...Rc5 14.Qd3 Qa8 15.Nd4+–) 14.Nd4 e5 (14...Nd4 15.ed4 Nf6+–) 15.Nc6 Qd7 (15...Qd2 16.Qf5 Qd7 17.Qd7 Kd7 18.Bg4 Kc7 19.Rd1+–) 16.Na4 Bc5 (16...Na5 17.Nb6 Rc6 18.bc6 Qc6 19.Qc6 Nc6+–) 17.Qb3 Qd2 18.Be5 Qe2 19.Re2 Ne7 20.Nc5 bc5 21.Bg7 Rg8 22.Ne7 Ke7 23.Qc3 Ke8 24.Qe5 Kd8 25.Rd1 1–0. DEFFM – GuestMHGB, freechess.org, 2018.

4.a3 d5 5.Nf3 +=.

4.e3 h5 5.Qf3 (better 5.Nf3+=) 5...h4?? (better 5...Ra7+=) 6.Qa8+– Nc6 7.bc6 Bb7 (7...dc6 8.Qa4 Bd7+–) 8.cb7 (8.cb7 e6 9.Qd8 Kd8 10.b8Q Ke7 11.Qc7+–) 1–0. GuestQNKR – guestvico, freechess.org, 2017.

4.e4 e6 5.d4 Bb7 6.Bd3 Qg5 7.g3 f5 8.f4 (8.Nf3 Qg6 9.Ne5 Qh6+=) 8...Qg6 (8...Qh6 9.d5=) 9.ef5 ef5 10.Nf3 Qe6 11.Kf2 Qd5 (better is 11...Nf6!? 12.Ng5 Qd5 13.Re1 Be7=) 12.c4+/– Qf3 13.Qf3 Bf3 14.Kf3 Ne7 (14...a3 15.Bc3 Nh6 16.Kg2+/–) 15.Re1 Kf7 16.a3 c6 (16...Ra7 17.Kg2+/–) 17.Nc3 g6 18.c5 bc5 (18...Bg7 19.Bc4 Ke8 20.cb6 Bd4 21.Na4 Bb2 22.Nb2+–) 19.dc5 cb5?? (19...Bg7 20.Bc4 Ke8+–) 20.Nb5 (20.Bb5 Bg7 21.Ba4 Rc8 22.Bb3 Kf8+/–) 20...Nbc6 (20...Bg7 21.Nd6 Kf8 22.Bg7 Kg7 23.Re7 Kf8+–) 21.Nd6 (21...Kg8 22.Bc4 Nd5 23.Bd5) 1–0. Fischer,A – Wartig,Wolfgang, corr SOK–89–30, 1989.

3.Bb2 Bb7

4.a4 (--> 3.a4 Bb7 4.Bb2).

4.c4 d5 5.cd5+= Qd5 6.Nc3 Qf5 7.e3 e5 8.Nge2 (8.d4 Nd7+=) 8...Nf6= 9.Ng3 Qe6 10.Qc2 Nbd7 11.Nce4 Nd5 (11...Ne4 12.Ne4 Rc8 13.Ng5=+) 12.Bc4 0–0–0 (better is 12...c6!?=) 13.Rc1+/– Nc5 (13...Nb4 14.Be6 Nc2 15.Rc2 fe6 16.Ng5 Bg2 17.Rg1+/– (17.Ne6?! Bh1 18.Nd8 Bd5=)) 14.0–0 (14.Nc5 Bc5 15.Ne4 Kd7+–) 14...Qd7 (14...Kb8 15.d4 ed4 16.Bd4 Ne4 A) < 17.Ne4 Nb4 18.Be6 Nc2 19.Rc2 Be4–/+ (< 19...fe6 20.Ng5+/–); B) 17.Qe4 Qe4 18.Ne4+=) 15.Nc5 (15.Be5 Ne4 16.Ne4 Nb4+–) 15...Bc5 16.Be5 (better is 16.Ne4 Bd6 17.Nd6 Qd6 18.Qf5 Qd7 19.Qe5+–) 16...f6 17.d4 Ba3 (17...Nb4 18.Qc3 fe5 19.dc5 bc5 20.Qe5+–) 18.Bd5 Bc1 (18...Bd5 19.Bc7 Bc1 20.Bb6 Kb8 21.Bd8 Rd8 22.Rc1 Rc8 23.Qc8 Qc8 24.Rc8 Kc8+–) 19.Be6!! (19.Rc1 fe5 20.Be6 Kb8 21.Bd7 Rd7+–; 19.Qc1 Bd5 (19...fe5?! 20.Bb7 Kb7 21.de5=+) 20.Bf4 g5–+ (20...Ba2 21.Qc2+=)) 19...Kb8 (19...Qe6 20.Qc7) 20.Bd7 (20...fe5 21.Bc6 Bc6 22.Rc1 Bb5 23.Qc7 Ka8 24.Qb6+–) 1–0. Mroz,Antoni – Szyszka,Jerzy, corr Poland, 1990.

4.c4 d5 5.cd5 Qd5 6.e3 Nf6 7.f3 e5 8.Nc3 Qe6 9.Nh3 h6 10.Qc2 Nbd7 11.Nf2 Nc5 12.Na4 Rd8 13.Nc5 Bc5 (worse 13...bc5 14.e4+–) 14.Bc4 Bd5 15.Bd5 Nd5 16.Ne4? (better 16.a3!?=) 16...Nb4–/+ 17.Qc3 Nd3 18.Ke2 Bb4 (18...Nb2?! 19.Nc5 bc5 20.Qb2=) 19.Qc2 f5 (19...Nb2?! 20.Qb2 Qd5 21.a3=+) 20.Nc3?? (better 20.a3 fe4 21.ab4–+) 20...Qc4 21.Kd1 (21.Rhb1 Nb2 22.Ke1 Nd3 23.Kf1 Qh4–+) 21...0–0 (21...Nb2 22.Ke1 Nd3 23.Kf1–+) 22.Rg1 (22.Na4 Nf2 23.Kc1 Bd2 24.Kb1 Qb5 25.Rg1–+) 22...Nb2 23.Kc1 Nd3 24.Kb1 Bc3 (24...Bc3 25.Qc3 Qb5 26.Qb3 Qb3 27.ab3 c6–+) 0–1. Rancic,Danijela (1840) – Mladenovic,Zoran (1915), Open Nis B, 2015.

4.c4 e6 5.Nc3 Nf6 6.e3 g6 (6...Bd6!?=) 7.Nf3+= Bg7 8.d4 0–0 9.Bd3 d5 10.c5 (10.0–0!?+=) 10...bc5= 11.dc5 c6 12.a4 (12.Rc1 Qe7+=) 12...Re8 (12...Nfd7 13.Rb1+=) 13.0–0 (13.Ne2 Nbd7 14.Qc2 e5 15.bc6 Bc6–/+) 13...Bf8 (13...Nfd7 14.Rb1+=) 14.Ba3 Nbd7 15.Nd4 Nc5 16.bc6 Ba6 17.Bb5 Qc7 18.Qc2 e5 19.Nb3 (19.Bc5!? Bc5 20.Nd5 Nd5 21.Qc5 ed4 22.Qd5 de3 23.fe3 Re3 24.Qd7 Qd7 25.cd7 Bb5 26.ab5+/–) 19...Nb3= 20.Qb3 Red8 (20...Ba3 21.Ra3 Red8 22.Rd1+=) 21.Bf8 Kf8 22.e4 (22.Rad1!? Qd6 23.Rc1+/–) 22...de4= 23.Rfe1 Rab8? (better is 23...Kg7=) 24.Qa3+– Kg7 25.Ba6 Qc6 26.Bb5 Qb6 (26...Qd6 27.Qd6 Rd6 28.Ne4 Ne4 29.Re4+–) 27.Ne4 Ng4 (27...Ne4 28.Re4 Rd2 29.Rf1+–) 28.h3 f5 (28...Nh6+–) 29.hg4 fe4 (29...Rb7 30.gf5 gf5+–) 30.Qe7 Kh6 31.Re4 g5+– 32.Re5 Rg8 33.Re6 Rg6 34.Rb6 Rbb6 35.g3 1–0. tarzan1990 – mikebaldini (1615), gameknot.com, 2015.

4.c4 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 b6 4.c4 Bb7).

4.d3 c6 5.c4 =.

4.d3 d6 5.e4 e5 6.Nf3 Nd7 7.Be2 Be7 8.0–0 (8.Nc3 Ngf6=) 8...Ngf6 9.a4 (9.Nh4 g6=) 9...0–0 10.Nbd2 h6 (10...Rc8 11.Re1=) 11.Nc4 (11.Re1 Nc5=) 11...Nh7 (11...Nc5 12.Qd2=) 12.Ne3 Nc5 13.c4 Ne6 (13...Nf6 14.Qc2=) 14.g3 (14.Qc2 Nhg5+=) 14...Nhg5 (14...Nf6 15.Nd2=) 15.Nd5 (15.Ng5 Bg5 16.Nd5 Rc8+=) 15...Nf3 (15...f5 16.Ng5 Ng5 17.f4 ef4 A) < 18.Ne7 Qe7 19.h4 Ne6–+ (19...fe4?! 20.hg5 f3 21.de4 fe2 22.Qe2–+); B) 18.gf4=) 16.Bf3+= Bd5 (16...Ra7 17.Bg2+=) 17.cd5+/– Ng5 (17...Nc5 18.Bg4+/–) 18.Bg2 f5 (18...Nh7 19.Rc1+/–) 19.f4 ef4 20.gf4 Nh7 21.e5 de5 22.fe5 f4 (22...Bb4!?+/–) 23.Qg4+– g5?? (better is 23...Bg5+–) 24.Qe6 Kh8 25.Qh6 Rg8 26.Be4 Rg7 27.d6 cd6 28.ed6 Bf6 29.Bf6 Qf6 30.Qf6 Nf6 31.Ba8 Rd7 32.h4! Rd6 33.hg5 (33...Nh7 34.Rf4 Ng5 35.Rg4+–) 1–0. Fredek (2065) – Guest1380855, Freundschaftspartie, 5m + 0s, 2006.

4.d3 e6 5.e4 Nf6 6.Nf3 Be7 7.Be2 0–0 8.0–0 Ng4 (8...c6 9.c4=) 9.h3 Nh6 (9...Nf6 10.c4+=) 10.c4 (10.Bc1 c6+=) 10...Bf6 (10...f5 11.Nc3=) 11.e5 (11.Nc3 d5+=) 11...Be7 12.Nbd2 d6 13.d4 Nd7 14.Qc2 de5 15.Ne5 Ne5 16.de5 Bc5 (16...Nf5 17.Rfd1+=) 17.Bf3 (17.Bd3 Nf5+=) 17...Bf3 18.Nf3 Qe8 19.Qe4 (19.Bd4 Qe7+=) 19...Nf5= 20.g4?? (20.Rfd1 Rd8=) 20...Ne7?? (better is 20...Ng3! 21.Qb1 Nf1–+) 21.Rad1 c6 (21...Rd8 22.Rd8 Qd8 23.Bd4+=) 22.a4 (22.Ng5 g6 23.Qf3 cb5+=) 22...cb5= 23.ab5 (23.cb5 Rd8=) 23...Ng6 (23...a4 24.Bd4=+) 24.h4 (24.Bd4 Qe7=) 24...Rd8 (24...Qe7!? 25.h5 Nh4=+) 25.h5+= Ne7? (25...Rd1 26.Rd1 Ne7 27.Ng5+=) 26.Bc1?? (better is 26.Ng5 g6 27.Bd4 Bd4 28.Rd4=) 26...Rd1= 27.Rd1 h6 28.Be3 Qc8 29.g5 (29.Bc5 Qc5 30.g5 hg5 31.Ng5 Nf5=) 29...Nf5 (29...Be3 30.Qe3 Qc4 31.gh6 Qg4 32.Kf1–/+) 30.gh6 (30.Bc5 Qc5 31.Qc6 Qc6 32.bc6 Rc8–/+) 30...Nh6 (30...Ne3 31.h7 Kh8 32.fe3=) 31.Bc5+= Qc5 32.Rd6 Nf5 (32...Qc7 33.Qc6 Qe7 34.Qb6+/–) 33.Rc6 Qb4 34.Rb6 Rd8 35.Ra6 Rd1 (35...a4!?+–) 36.Kg2 a4?? (36...Qe7 37.Ra5 Rd7+–) 37.Ra8 Kh7 38.Ng5 Kh6 39.Nf7 Kh5 40.Qf4 Kg6 41.Nh8 Kh7+– 42.Nf7 Qe7?? 43.Ng5 Kg6 44.Nf3 Kf7 (44...Qb7 45.Qg4 Kh7 46.Rf8+– (46.Ra4?! Kg8+–)) 45.Qg4 (< 45.Ra4 Qb7 46.Qg4 Rd3+–) 45...g6 (45...Rd8 46.Ng5 Qg5 47.Qg5 Ra8 48.Qh5 Ke7+–) 46.Rh8 Kg7 47.Ng5 (better is 47.Qh3 Nh4 48.Rh4 (48.Nh4 Qg5 49.Qg3 Qg3 50.fg3 Kh8 51.Ng6 Kg7=) 48...Qh4 49.Qh4+–) 47...Kh8 (47...Qb7 48.Qf3 Qf3 49.Nf3 Kh8 50.Ng5–+) 48.Qd1 Qg5 49.Kf1 Qh5 (49...a3 50.Qa4 Qc1 51.Kg2–+) 50.Qd8 Kg7 51.Qd7 (51...Kh6 52.Ke1–/+). Fredek (2090) – Guest354785, Freundschaftspartie, 5m + 0s, 2005.

4.d4 Nf6 5.c4 a4 (5...e6 6.Nc3=) 6.a3 e6 7.Nc3 d5 8.Nf3 c5 9.e3 Be7 10.Be2 (10.Na4 0–0+=) 10...0–0 11.0–0 Nbd7 12.Na4 cd4 13.ed4 (13.Nd4!? Bd6 14.f4+/–) 13...dc4= 14.Nc3 (better is 14.Nd2=) 14...Bc5?? (better is 14...Qc7+=) 15.Qc2?? (better is 15.dc5 Nc5 16.Ne5+–) 15…Rc8?? (15...Rc8 16.dc5 Rc5+–; better is 15...Bd6+=). Degner – Wartig,Wolfgang, (year?).

4.e3 a4 (--> 3.e3 Bb7 4.Bb2 a4).

4.e3 c5 (--> 3.e3 Bb7 4.Bb2 c5).

4.e3 c6 (--> 3.e3 Bb7 4.Bb2 c6).

4.e3 d5 (--> 3.e3 Bb7 4.Bb2 d5).

4.e3 d6 (--> 3.e3 Bb7 4.Bb2 d6).

4.e3 e6 (--> 3.e3 Bb7 4.Bb2 e6).

4.e3 e6 5.Nf3 Nf6 6.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b6 4.e3 Bb7 5.Nf3 a5 6.b5).

4.f3 Nf6 5.e4 d6 6.d4 g6 (6...e6 7.Nh3+=) 7.d5 (7.Bd3 Bg7+=) 7...Bg7+= 8.g4 (8.Bc4 0–0+=) 8...0–0 9.Bc4 Nbd7 10.Ne2 Nc5 11.a4 Ncd7 12.Nd2 (12.h4 Rc8=) 12...Ne5 13.Bb3 Rc8 14.0–0 Re8 15.h3 e6 16.de6 fe6 17.Nf4 d5? (better is 17...Qd7+=) 18.ed5?? (18.Be5 Ng4 19.fg4 (19.hg4?! Be5 20.Ng2 Bd4 21.Kh2 Ba1 22.Qa1 Qg5+=) 19...Be5 20.Rb1+/–) 18...ed5 19.Nb1 (19.Re1!? Nf7 20.Re8 Qe8 21.Qe2=+) 19...Kh8 20.Nd5 Bd5 (20...Nd5 21.Bd5 Bd5 22.Nc3–+) 21.c4 Bc4 22.Qd8 Rcd8 23.Bc4 Nc4 24.Nc3 (24.Bc3–+) 24...Nb2 25.Rab1 (25.g5 Nd7 26.Ne4 Nd3–+) 25...Nc4 (better is 25...Ng4 26.fg4 Bc3 27.Rf7–+) 26.Ne2 (26.g5 Nd5 27.Ne4 Bd4 28.Kh2 Rf8–+) 26...Nd5 (better is 26...Re2 27.Rf2 Rf2 28.Kf2 Rd2 29.Kg3–+) 27.Ng3 (27.Rbe1 Nd2 28.Rf2 Nf4 29.Nf4 Re1 30.Kg2 Rd4–+) 27...Nf4 (27...Nd2 28.Ne4 Nb1 29.Rb1–+) 28.h4 (28.Ne4 Nd2 29.Nd2 Rd2–+) 28...Ne2 (better is 28...Nd2 29.Rbc1–+) 29.Ne2 Re2 30.Rfe1 Rdd2 31.Re2 Re2 32.Rc1 (32.Kf1 Ra2 33.Re1 Be5–+) 32...Nd6 (better is 32...Nd2 33.Rc4 Nc4–+) 33.Rc7 Bd4 34.Kf1 Rf2 35.Ke1 Rf3 36.Rd7 Bc5 37.Rd8 (37.h5 gh5 38.gh5 Rh3–+) 37...Kg7 38.h5 (38.Rd7 Nf7 39.h5 Rf4 40.hg6 Kg6–+) 38...gh5 39.gh5 (39.Rd7 Kh6 40.g5 Kg5–+) 39...Kh6 40.Ke2 Rf5 (40...Rf4 41.Rg8–+) 41.Kd3 (41.Ke1 Rh5 42.Rf8 Rh1 43.Rf1 Rh4–+) 41...Rh5 42.Kc3 Rg5 43.Kd3 (43.Kb2 Rg4–+) 43...Kg6 (better is 43...Rg4 44.Ra8–+) 44.Rg8 Kf5 (44...Kh5 45.Rg5 Kg5 46.Ke2–+) 45.Rh8 (45.Rf8 Ke5–+) 45...h5 46.Ke2 (46.Rf8 Kg4–+) 46...Kg4 47.Kf1 (47.Kd3 Rd5 48.Ke2 Re5 49.Kd1 Re4 50.Rg8 Kh4–+) 47...h4 (47...Kf3 48.Ke1 Nc4 49.Rg8 Rg8 50.Kd1 Rg2 51.Kc1 Be3 52.Kb1 Na3 53.Ka1 Bd4) 48.Kg2 Ne4 49.Re8 (49.Kh2–+) 49...h3 50.Kh2 (50.Kh1 Nf2 51.Kh2 Bd6 52.Kg1 Kf3 53.Kf1 Rg1 54.Kg1 h2 55.Kf1 h1Q) 50...Bd6 51.Kg1 (51.Kh1 Nf2 52.Kg1 Kf3 53.Kf1 Rg1 54.Kg1 h2 55.Kf1 h1Q) 51...Kf3 52.Kf1 h2 53.Rh8 (53.Rf8 Bf8 54.Ke1 h1Q) 53…Rg1 0–1. MasterofDisaster – baretti, Live Game Caissa's Web, 2004.

4.Nf3 d6 5.e3 (--> 3.e3 Bb7 4.Bb2 d6 5.Nf3).

4.Nf3 e6 5.e3 f5 6.Bc4 d5 (6...Nf6 7.0–0+=) 7.Be2+= c5 8.0–0 Nf6 9.Ng5 Qe7 10.f4 Nbd7 11.Na3 g6 12.c4 (12.d4 Bg7=) 12...h6 (12...Bg7 13.d3=) 13.Nf3 Bg7 14.d3 (14.Ne5 Ne5 15.fe5 Ne4=) 14...0–0= 15.Ne5 Ne5 16.Be5 Nd7 (16...Rad8 17.Bf3=) 17.Bg7+= Kg7 18.Bf3 Nf6 19.Qa4 Rad8 20.Rad1 e5 21.fe5 Qe5 22.Rfe1 (22.Nc2 dc4 23.d4 Qe7 24.Qc4 Be4 25.Be4 Ne4=) 22...Rfe8 (22...Qb2 23.Nc2=) 23.Rd2 (better is 23.Qc2=) 23...d4 (better is 23...f4 24.Rde2 Qc3=) 24.Bb7+/– de3 25.Bf3?? (25.Rde2 Rd3 26.Nc2 f4+/–) 25...f4?? (better is 25...ed2 26.Re5 Re5–/+) 26.Rdd1+– g5 (26...Qc3 27.Nb1 Qd4 28.Re2+–) 27.Nc2 (27.Qb3 g4 28.Be2 Qg5+/–) 27...g4 (better is 27...Qc3+–) 28.Be2?? (28.Bc6 Re6+–) 28...h5? (28...f3 29.gf3 gf3 30.Bf3 Qf4 31.Re3 Re3 32.Ne3 Qe3 33.Kg2 Kh7–+) 29.Rf1 Kh6 (29...Qg5 30.Kh1+/–) 30.Rde1 (30.Kh1 h4+/–) 30...Rg8 (30...Qg5 31.Kh1+–) 31.Kh1 h4 (31...f3 32.gf3 g3 33.Ne3 Qe3 34.hg3 Rg3 35.Rg1 Rh3 36.Kg2 Rh4 37.Kf1 Rh2 38.Rg6 Kg6 39.Qa5 Qf2) 32.Na3?? (32.Qa3 h3 33.gh3 f3 34.Bf3 gf3 35.Rf3 e2+–) 32...Qg5? (32...h3 33.gh3 f3=+) 33.Rg1+/– Nh5 34.Qd1 Ng3 35.hg3 hg3 36.Bg4 Qg4 37.Qg4 Rg4 38.Rgf1 Kg5 39.Kg1 Rh8 (39...Rd3?! 40.Nb1 Rh4 41.Rf3–/+) 40.Rf3 Rgh4 (better is 40...e2 41.Re2 Rgh4 42.Re5 Kf6–+) 41.Kf1 Rh1 42.Ke2 R1h2?? (better is 42...Re1 43.Ke1 Rh2–+) 43.Rg1+= Rh1 44.Rh1 Rh1 45.Nc2 Rc1 (45...Rb1!? 46.Ne3 Rb2 47.Kd1 fe3 48.Rg3 Kf4 49.Rf3 Kg5 50.Re3 Ra2+/–) 46.Ne3 fe3 47.Rg3 Kf4 48.Rf3 Kg4? (better is 48...Ke5+–) 49.Rf6 Rc2 (49...a4 50.Rb6 Kf4 51.Rf6 Ke5 52.Rf8 Rc2 53.Ke3 Rg2 54.Rc8+–) 50.Ke3 Ra2 51.Rb6 a4 52.d4 cd4 (52...Kf5 53.dc5 Rg2 54.c6+–) 53.Kd4 a3 (53...Ra1 54.Ra6+–) 54.Ra6 Ra1 (54...Kf5+–) 55.b6 a2 (55...Kg3 56.c5 Rd1 57.Ke5+–) 56.Kc5 Rg1 57.b7 (57...Rb1 58.Kc6+–) 1–0. kamret (2175) – peti0815 (2060), GameColony.com, 2003.

4.Nf3 Nf6 5.c4 e6 6.e3 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 b6 4.c4 Bb7 5.Nf3 e6 6.e3).

4.Nf3 Nf6 5.c4 g6 6.g3 Bg7 7.Bg2 0–0 8.Nc3 c5 9.0–0 d6 10.d3 Nbd7 11.Nd2 Bg2 12.Kg2 Qc7 13.e4 e6 14.f4 Rfe8 15.h3 Qb7 16.Qf3 Qc7 17.Na4 Nh5 18.Bg7 Kg7 19.Rae1 e5 20.f5 Ndf6 21.Rf2 Rg8 22.Qd1 Rae8 23.Nf1 Qd8 24.Ne3 Kh8 25.Nc3 Rg7 26.Kh2 Reg8? 27.Rg1 g5+= 28.Kh1 g4 29.h4 Rf8 30.Kh2 Nf4 31.Rb2 N4h5 32.Rb1 Re8 33.Rb2 Rf8 34.a3 Re8 35.Rb1 Rf8 36.Rc1 Re8 37.Rc2 ½–½. Woelfelschneider,Peter (2335) – Gnuechtel,Andreas (2205), CiF–11.Superturnier, 2010.

4.Nf3 Nf6 5.e3 (--> 4.e3 Nf6 5.Nf3).

4.Nf3 g6?? 5.g3 (better 5.Bh8 f6 6.h4+–) 5...f6? (better 5...Nf6!?=) 6.Bg2+– Bg7 7.0–0 Nh6 8.c4 0–0 9.d4 d6 10.Nbd2 (10.Nc3 e6+–) 10...Kh8 (10...e5 11.c5 dc5 12.dc5 bc5 13.Qb3 Kh8 14.Rfd1+–) 11.e4 (11.d5 Nd7+–) 11...Nd7 12.a4 (12.Bh3 e5+=) 12...e5+= 13.Qc2 Rc8 14.Rad1 Qe7 15.Nb3 White intends c5 15...Nf7 16.c5 dc5 (16...c6 17.Bh3 f5 18.ef5 cb5 19.fg6 Bf3 20.gf7 ba4 21.Nd2 Bd1 22.Rd1 ed4 23.c6=) 17.dc5+– Nc5 18.Nc5 (18.Ba3 A) 18...Be4? A1) 19.Bc5? Bc2 20.Be7 Rfe8–+ (20...Bb3?! 21.Bf8 Bf8 22.Ra1–/+); A2) 19.Qe4 Ne4 20.Be7+–; B) 18...Nd6 19.Bc5 bc5+–) 18...bc5 (18...Qc5!? 19.Qc5 bc5+=) 19.Ba3 (19.Nd2 c6 20.b6 Ba6+–) 19...Nd6 20.Bc5 Rfe8 (20...Qe6 21.Nd2+–) 21.Qc1 (21.Nd2!? Qf7 22.Bd6 cd6 23.Qb3+–) 21...Be4+= 22.Qa3 (22.Rfe1 f5+=) 22...Red8 (22...Bb7!?=) 23.Rfe1+= f5? (23...Qf7 24.Bd6 Bc2 25.Ne5 fe5 26.Bd5=) 24.h4?? (24.b6 Bf3 25.Bf3 e4 26.bc7 Qc7 27.Bd6 Rd6 28.Rd6 ef3+–) 24...Bf8?? (24...Qf6!?=) 25.Ng5 (better 25.Ne5 Re8 26.b6+–) 25...Bg2+= 26.Kg2 h6 27.Nf3 e4 28.Nd4 Kh7 (better 28...Rd7!?+–) 29.Nc6+– Qe6 30.Na5 (30.Nd8!? Rd8 31.Qc3 Qf7+–) 30...f4 (30...Rd7+–) 31.Nc6 (31.Qb3 Qg4 32.Nc6 Re8+=) 31...Rd7 (31...Re8 32.Rd4 e3 33.Rf4 Nb5 34.ab5 Qd5 35.Kh2 Bc5 36.Qb2=+) 32.Bd6 (32.gf4!? Nc4 33.Rd7 Qd7 34.Qh3 Qh3 35.Kh3 Bc5 36.Rc1+–) 32...f3 (32...Bd6 33.Qc3 Rf8 34.Rd4 fg3 35.fg3–+) 33.Kh2 Bd6 (worse 33...cd6 34.Qf3!? d5 35.Qd3+–) 34.Qe3 Re8 35.Nd4?? (35.Rd4 Qg4 36.Rh1 Rf7=) 35...Qf6?? (better 35...Qg4 36.Rh1 Red8–+) 36.Nf3= Rde7 (36...Rf7!? 37.Nd2 Qf2 38.Qf2 Rf2 39.Kg1 Bc5=) 37.Nd2+– Qh4 38.Kg2 Qg4 39.Rh1 h5 40.a5 (40.Nc4!?+–) 40...Bb4 (40...Qf5 41.Nc4 Qb5 42.Nd6 cd6 43.Rd6 Qa5 44.Rc1=) 41.Nc4 Rf8 42.Rd5 (42.Rhf1 Qe6 43.Qc1 Qf5=) 42...Ref7 43.Ne5?? (better 43.Rf1 Rf3 44.Qd4=+) 43...Rf2–+ 44.Qf2 Rf2 45.Kf2 e3! 46.Ke3 Qg5?? (46...Qg3 47.Nf3 Ba5 48.Rd3 Bb6 49.Ke4 Qg4 50.Kd5–+) 47.Ke2 (better 47.Ke4!? Qf5 48.Ke3–+) 47...Ba5–+ 48.Rf1 Bb6?? (48...Bc3!? 49.Rd7 Kg8 50.Nf3 Qb5 51.Rd3–+) 49.Rf7? (better 49.Rf4 c6 50.bc6 Qg3 51.Rf3 Qh2 52.Kd3=) 49...Kh6–/+ 50.Rfd7 Qe3 (50...Qg3?? 51.Nf7 Kg7 52.Ng5 Kg8 53.Rd8 Kg7 54.R5d7 Kh6 55.Nf7 Kh7 56.Nd6 Kh6 57.Rh8 Kg5 58.Ne4 Kf4 59.Ng3 Kg3 60.Rc8+–) 51.Kd1 Qb3 (51...Qg3?? 52.Nf7 Kg7 53.Ng5 Kg8 54.Rd8 Kg7 55.R5d7 Kh6 56.Nf7 Kg7 57.Nd6 Kh6 58.Rh8 Kg5 59.Ne4 Kg4 60.Ng3 Kg3 61.Rc8+–) 52.Ke1? (52.Ke2 Qc2 (52...Qg3?? 53.Nf7 Kg7 54.Ng5 Kg8 55.Rd8 Kg7 56.R5d7 Kh6 57.Nf7 Kg7 58.Nd6 Kh6 59.Rh8 Kg5 60.Ne4 Kg4 61.Ng3 Kg3 62.Rc8+–) 53.Ke1 g5 54.Nf7 Kg6 55.Rg5 Kf6–+) 52...Ba5?? (better 52...Qg3 53.Kd2 Kg5–+) 53.Kf2=+ Bb6 54.Kg2?? (54.Ke1 Qg3 55.Ke2 Qe3 56.Kd1 Qb3 57.Ke2 Qc2 58.Ke1 Kg5 59.Nc4 Kf4 60.Nb6 cb6–+) 54...Qb2 (better 54...Qc2 55.Rd2 Qe4 56.Nf3 g5–+) 55.Kh3= Qf2?? (better 55...Qe2 56.Nf7 Kg7 57.Ng5 Kg8 58.Rd8 Kg7 59.R8d7 Kf8 60.Rd8 Kg7 61.R8d7=) 56.Nf7+– Kg7 57.Ng5 Kg8 58.Rd8 Kg7 (58...Qf8+–) 59.R5d7 Kh6 60.Nf7 Kg7 61.Nd6 Kh6 62.Rh8 (62.Rh8 Kg5 63.Ne4 Kf5 64.Nf2+–) 1–0. samyaksamadhi – bolu, net–chess.com, 2019.

4.e3 Nf6

5.c4 d6 6.d4 Nbd7 7.Nf3 g6 8.Bd3 Bg7 9.Nc3 0–0 10.0–0 e5 11.de5 de5 12.e4 Qe7 (12...Nc5 13.Nd5 A) 13...Bd5?! A1) 14.ed5? e4–+ (14...Nd3?! 15.Qd3 e4 16.Bf6 Bf6 17.Qe4=+); A2) 14.cd5 Nfe4 15.Be4 Ne4 16.Be5=; B) 13...Nd5 14.cd5 f5=+) 13.Nd5 Bd5 14.cd5 Ne8 15.Qc2 Rc8 16.Rac1 Nd6 17.Ba3 Bh6 18.Rcd1 f5 19.Rfe1 f4 20.Rc1 g5 21.h3 Bg7 22.Qc6 h5 (22...Bf6!?+/–) 23.Ng5+– Qg5 24.Qd7 f3 25.g3 Rf7 26.Qc6 Rcf8? 27.Bd6 cd6 28.Qb6 Bh6 29.Qd6 Rg7 30.h4 Qd2 31.Red1 Rg3 32.Kf1 Rh3 33.Qe6 Kh8 34.Qh3 Qf4 35.Rc7 Rg8 36.b6 Qf6 37.Qe6 (37...Bg7 38.Qf6 Bf6 39.b7+–) 1–0. kamret (2190) – Archirey (1870), GameColony.com, 2005.

5.c4 e6 6.Nf3 Be7 (6...Bb4 7.Be2=) 7.Be2 d6 (7...0–0 8.0–0=) 8.d4 Nbd7 (8...0–0 9.Nc3+=) 9.0–0+= 0–0 10.Nc3 Ng4 (10...c6 11.Bd3=) 11.Nd2 (11.Bd3 f5+=) 11...Nh6 (11...Ngf6 12.Bf3 Qc8 13.Qa4+=) 12.Bf3 Bf3 13.Nf3 (worse is 13.gf3 Bf6=) 13...f5 14.Qc2 (14.Qd3 Qe8+=) 14...g5 (14...Nf6 15.Rad1+=) 15.Ne2 (15.Rad1 Bf6+/–) 15...Qe8 (15...Bf6 16.a3+/–) 16.Ng3 (16.Rad1 Bf6+/–) 16...Qg6+= 17.a4 (17.Rfd1 Rac8+=) 17...Ng4 (17...Rac8 18.Rab1+=) 18.h3 (18.Rae1 Rac8+/–) 18...Ngf6 (18...Nh6 19.Rae1+=) 19.Nh2 (19.d5 Ne4+/–) 19...h5 (19...Rac8 20.Rab1=) 20.Rfe1 (20.Rad1 Rae8+=) 20...h4 21.Ngf1 (21.Ne2 Rac8+=) 21...Rf7 (21...Ne4 22.f3 Nef6 23.Nd2+=) 22.Nd2 (22.Rad1 Ne4+=) 22...g4 23.hg4 Ng4 24.e4 (24.Qd1 Raf8=) 24...f4 (24...Rg7 25.ef5 ef5 26.Nhf1=) 25.Qb3 Rg7 26.Qh3 e5 (26...Kf7 27.Nhf3+=) 27.Ndf3 Bf6 28.Rad1 ed4 29.Bd4 Nde5 30.Ne5 de5 31.Bb2 Kh8 32.Nf3 Rag8 33.Re2 Qh5 34.Ne1?? Ne3!–/+ 35.Rd7?? Qe2–+ (35...Qe2 36.fe3 Qe1 37.Kh2 Rd7–+) 0–1. Dyga,Ryszard – Kabir,Razaul, Karl Mala mem op, 1997.

5.c4 g6 6.Nf3 Bg7 7.Be2 0–0 8.0–0 d5 9.d4 Nbd7 10.Nbd2 Rc8 11.Qb3 c5 12.bc6 Bc6 13.Rfc1 e6 14.Rc2 Rb8 (14...dc4 15.Rc4 Bd5 16.Rc8 Qc8 17.Nc4+=) 15.Rac1+/– Ne4 16.Ne4 de4 17.Nd2 h5 (17...Qh4 18.Rd1+=) 18.Ba3+/– Re8 19.Bd6 Ra8 20.c5 bc5 21.dc5 Qg5 22.Bb5 Bd5? (better is 22...a4 23.Qb1 Qd5+/–) 23.Qa4+– Nf6 24.Be8 Ne8 25.Ne4 Qd8 26.Nc3 Bb7 27.Rd1 Qc8 28.Be7 Bc6 29.Qh4 Qb7 30.f3 f6 31.Bd6 Bh6 32.Qd4 h4 33.Rb1 Qf7 34.Rb6 Rc8 35.Rcb2 e5 36.Qd3 h3 37.e4 hg2 38.Kg2 Bf4 39.Nd5 Nd6 40.cd6 Qh7 (40...Bd5 41.Qd5 Qd5 42.ed5 Kg7 43.Rb7 Kh6+–) 41.Nf6 (41.Nf6 Kh8 42.Nh7 Kh7 43.d7+–) 1–0. Miljanovic,Zeljko (1915) – Ikica,Ante (2075), Porec CC–ch, 2009.

5.Nf3 d5 6.Rg1 Nbd7 (6...e6 7.g4=) 7.g4 e5 (7...e6 8.Be2=) 8.g5 (better 8.Ne5 Ne5 9.Be5+=) 8...e4? (better 8...Ne4=) 9.gf6+– gf6 (9...Nf6 10.Ne5+–) 10.Nh4 (10.Nd4 Nc5+–) 10...Bd6 (10...a4 11.f4+–) 11.Nf5 (11.f4 ef3 12.Nf3 Qe7+–) 11...Ne5 (11...Bh2 12.Rg7 h5 13.Be2+–) 12.Ng7 (12.Be2 Bc8 13.Nd6 Qd6+–) 12...Ke7 (better 12...Kf8 13.Be5 Be5+–) 13.Nf5 Ke8 14.Be5 (14.Be2 c6+–) 14...Be5 15.Nc3 Bc8 16.Bh3 (16.Ng7 Kf8 17.f4 Bc3 18.dc3 f5+–) 16...Bf5 (16...Bh2 17.Rg2 Be5 18.d4 ed3 19.Qd3 Bf5 20.Bf5+–) 17.Bf5 Qd6 18.Qh5 (18.f4 ef3 19.Qf3 Rd8+–) 18...Ke7 (18...c6 19.Rg7 Ra7 20.Rb1+–) 19.Rd1 (19.Rg7 Raf8+–) 19...Rag8 (19...Qc5 20.Rg7 Raf8 21.Bh3+– (worse 21.Rh7 Rh7 22.Bh7 Rh8+–)) 20.Kf1 (20.Rg8!? Rg8 21.Qh7 Rg2+–) 20...Rg1 (20...Bc3 21.dc3 Rg1 22.Kg1 Rg8 23.Kh1+–) 21.Kg1 Qc5 (21...Bc3 22.dc3 Rg8 23.Kh1+–) 22.Ne2 (22.Kh1!? Bc3 23.dc3 Qc4+–) 22...Qc2 (22...Rg8 23.Kf1 Qc2 24.Ke1 Qa2 25.Qh7+– (25.Bh7?! Rg2 26.f4 ef3 27.Qf3 Rh2+=)) 23.Ng3 Rg8 (better 23...Qa2 24.d3 ed3 25.Bd3 Qb3+–) 24.Bh3?? (better 24.f4 Bd6 25.d3+–) 24...Rg5 25.Qe2 Qc5?? (better 25...Qa2!? 26.f4 ef3 27.Qf3 Qb3+=) 26.Kh1 (26.d4 ed3 27.Qd3 Bg3 28.hg3 Qc4+–) 26...Kf8? (better 26...Qc2+–) 27.d4+– Bg3 (27...ed3 28.Qd3 Bg3 29.fg3 Re5+–) 28.dc5 Bd6 (28...Bh4+–) 29.cd6 cd6 30.Rg1 d4 31.Rg5 (31.ed4 d5+–) 31...d3 32.Qd2 (32.Qh5 fg5 33.Qh6 Ke7 34.Qg5 Kf8 35.Qd8 Kg7 36.Qb6 d2 37.Qd4 f6+–) 32...fg5 33.Bf5 Ke7 34.Be4 d5 35.Bd3 f5 36.Be2 (36.Bf5 h5 37.Qd5 Kf6 38.Qe6 Kg7 39.Qe7 Kg8 40.Be6 Kh8 41.Qf8 Kh7 42.Bf5) 36...Ke6 37.Qd4 f4 38.Bf3 g4 (38...fe3 39.Qe3 Kf6 40.Qb6 Kf5 41.Bd5 Ke5 42.Qe6 Kd4 43.b6 h6 44.b7 Kc3 45.Qe3 Kc2 46.b8Q a4 47.Qc7 Kd1 48.Bf3) 39.Bd5 (39.Qd5 Kf6 40.Qd6 Kf7 41.Bd5 Kg7 42.Qe7 Kg6 43.ef4 h5 44.Be4 Kh6 45.Qf6) 39...Kd6 40.ef4 g3 (40...h6 41.Bc6 Ke6 42.Qd7 Kf6 43.Bd5 g3 44.Qf7) 41.Be4 (41.Bc6 Ke7 42.Qe5 Kf7 43.Bd5 Kf8 44.Qf6 Ke8 45.Bc6) 41...Ke7 42.Qe5 (42.Qg7 Kd6 43.Qe5 Kd7 44.Bc6 Kd8 45.Qd6 Kc8 46.Qd7 Kb8 47.Qb7) 42...Kf7 (42...Kd7 43.Bc6 Kd8 44.Qd6 Kc8 45.Qd7 Kb8 46.Qb7) 43.fg3 (43.Bd5 Kf8 44.Qf6 Ke8 45.Bc6) 43...h5 (43...h6 44.Bd5 Kg6 45.Qe6 Kg7 46.Qf7 Kh8 47.Qg8) 44.Bd5 Kg6 45.Qg5 (45.Bg8 h4 46.Qg5) 45...Kh7 46.Be4 Kh8 47.Qg6 h4 48.Qh7 1–0. FeegLood (2705) – GoGSWarriors_30 (2485), lichess.org, 2017.

5.f4 e6 6.Nf3 =.

5.f4 g6 6.Nf3 Bg7 7.c4 0–0 8.Nc3 d6 (8...Ne4 9.d4=) 9.Be2 Nbd7 (9...c5 10.0–0=) 10.0–0+= Ne4 11.Qc2 Ndc5 12.d3 Nc3 13.Bc3 e5 (13...Bc3 14.Qc3 e6 15.Rad1+=) 14.fe5+/– de5 15.e4 (15.Ne5 Qg5 16.Ng4 Bc3 17.Qc3 f5+=) 15...Qe7 (15...Qd6 16.Rae1=) 16.Rf2 (16.Rad1 f5 17.Nd2 Qg5=) 16...Rad8= 17.Raf1 Rd6 (17...f5 18.ef5 gf5 19.Kh1=) 18.Bd2 (18.Ne1!?+=) 18...Rfd8 Increases the pressure on the backward pawn 19.Ne1 f6 (19...Be4!? 20.Rf7 Qf7 21.Rf7 Kf7=) 20.Be3+= R6d7 21.Qc1 Rf8 22.Qa3 Ne6 23.Qe7+/– Re7 24.Bg4 Rd8= 25.Rc2 Nd4 26.Bd4 Rd4+= 27.Be2 Rd8 28.c5 Kf7 29.Nf3 Bh6 30.cb6 Be3–/+ 31.Kh1 cb6 32.g4 Bc8 33.Rc6 (33.Rc6 Bd7 34.Rd6–/+; 33.g5 Bh3 34.Ne5 Re5 35.Rf6 Kg8=). Valles,Angel – Ruiz,Luis, Oviedo rapid, 1991.

5.Bf6 ef6 6.d4 Bd5 =.

5.Nf3 d6

6.c4 Nbd7 7.Bd3 (7.Be2 e5+=) 7...Nc5 (7...e5 8.Be2=) 8.Bc2+= e5 9.0–0 (9.d4 ed4 10.ed4 Qe7 11.Kf1+=) 9...Qd7 (9...e4!? 10.Nd4 d5 11.cd5 Qd5+=) 10.d4+/– ed4 (10...Nce4 11.de5 de5 12.Qd7 Nd7 13.Ne5 Ne5 14.Be5+/–) 11.ed4 (11.Nd4?! g6+=; 11.Bd4?! Be7+=) 11...Ne6 (11...Nce4 12.d5 0–0–0 13.Nbd2 Nd2 14.Qd2+/–) 12.Re1 (12.d5 Nf4 13.Bf6 gf6 14.Re1 Be7+–) 12...d5 13.Ne5 Qd8 14.Qf3 (14.Bf5 Bc8 15.cd5 Qd5+–) 14...Be7 (14...Bb4 15.Re2+/–) 15.Bf5 0–0 (better is 15...Ng5!? 16.Qf4 Nge4+/–) 16.Nf7!+– Ng5?? (16...Rf7 Decoy to f7 17.Be6 A pinning theme) 17.Ng5 (17.Ng5 Bb4 18.Nc3+–; 17.Nd8?! Nf3 18.gf3 Bd8+/–) 1–0. Gengler,Pierre – Buerger,Arsene, Luxembourg op, 1997.

6.c4 e5 7.a4 Nbd7 8.Be2 Be7 9.0–0 0–0 10.Nc3 g6 (10...e4 11.Nd4+=) 11.d4+= ed4 12.Nd4 Re8 13.Bf3 Bf3 14.Qf3 Ne5 15.Qe2 Bf8 16.Rad1 Qc8 17.Nd5 Nd5 18.cd5 Qb7 19.Nc6 Nc6 20.dc6 Qc8 21.Qc4 Bg7 22.Bg7 Kg7 23.Rd4 Re5 24.Rfd1 Qf5 25.h3 Qe6 26.Qc3 Kg8 27.Qd3 Re8 28.Rd2 Re4 29.Rc2 Rd4 30.Qd4 Qe5 31.Rc4 Qd4 32.Rd4 (worse 32.ed4 Re1 33.Kh2 d5–/+) 32...Re5 33.Kf1 f5 34.Ke2 Kf7 35.Kd3 Ke6 36.f3 Rd5 37.e4 Re5 38.ef5 Rf5 39.Rh4 h5 40.Re4 Re5 41.Kd4 (41.h4 Re4 42.fe4 Ke5=) 41...Kf6 (41...Re4 42.Ke4 (42.fe4? h4–+) 42...h4 43.f4=+) 42.g4 hg4 (42...Re4 43.fe4 h4 44.Kd5=) 43.hg4+= Ke6 44.f4 Re4 45.Ke4 Kf6 46.g5 (46.Kf3!?+=) 46...Ke6= 47.Kd4 Kf5 (47...d5 48.Ke3=) 48.Ke3 (better 48.Kd5 Kf4 49.Ke6+–) 48...d5= 49.Kf3?? (better 49.Kd4 Kf4 50.Kd5=) 49...d4–+ 50.Kg3 d3 (50...Ke4 51.f5 Kf5 52.Kf3–+) 51.Kf3 d2 52.Ke2 Kf4 53.Kd2 Kg5 54.Kd3 (54.Ke3 Kf5–+) 54...Kf5 55.Kd4 Ke6 56.Ke3 Kd6 57.Kf4 Kc5 58.Kg5 (58.Ke5 g5 59.Ke6 g4–+) 58...Kb4 59.Kg6 (59.Kf6 Ka4 60.Ke7 Kb5 61.Kd7–+) 59...Ka4 60.Kf7 Kb5 61.Ke7 Kc6 62.Ke6 a4 63.Ke5 a3 64.Kd4 a2 65.Kc3 a1Q 66.Kb3 Qb1 (66...Qd1 67.Kc4 Qd2 68.Kb3 b5 69.Ka3 Qc2 70.Kb4 Qb2 71.Ka5 Qa3) 67.Ka3 (67.Kc4 Qe4 68.Kc3 Qe3 69.Kc2 Qf2 70.Kb3 Qd2 71.Ka4 Qe3 72.Kb4 b5 73.Ka5 Qa3) 67...Qa1 (67...Kc5 68.Ka4 Qb4) 68.Kb3 Qa5 (68...Qc1 69.Ka2 b5 70.Kb3 Kc5 71.Ka2 b4 72.Kb3 Qb1 73.Ka4 Qa2) 69.Kb2 (69.Kc2 Qc5 70.Kd2 Qd4 71.Ke2 b5 72.Kf3 b4 73.Ke2 b3 74.Kf1 Qd2 75.Kg1 b2 76.Kf1 b1Q) 69...Qc5 (69...Qd2 70.Ka1 b5 71.Kb1 b4 72.Ka1 b3 73.Kb1 Qc2 74.Ka1 Qc1) 70.Kb3 Qb5 (70...b5 71.Kb2 b4 72.Kb3 Qc3 73.Ka2 b3 74.Ka3 b2 75.Ka4 Qd4 76.Ka3 b1R 77.Ka2 Qb2) 71.Ka3 Qa5 (71...Qa5 72.Kb2 Qd2 73.Kb3 b5 74.Ka3 Qc2 75.Kb4 Qb2 76.Ka5 Qa3; 71...Qb1 72.Ka4 Kc5 73.Ka3 c6 74.Ka4 Qb4) 0–1. BeepBeepImAJeep (2615) – shlykov (2370), lichess.org, 2017.

6.c4 e5 7.d4 Bf3 8.Qf3 e4 9.Qd1 d5 10.Nc3 Bb4 11.Qb3 Qd6 12.a3 Bc3 13.Qc3 Nbd7 14.Rc1 0–0 15.c5 bc5 16.dc5 Qe6 17.c6 d4 18.Qd4 Nb6 19.Bc4 Qg4 20.0–0 Rad8 21.Qc3 Rd6 22.h3 (22.Qa5?! Nc4 23.Rc4 Qe2=) 22...Qh5 23.Qe5 Qg6 24.Bd4 Nc4 25.Rc4 Nd5? (better is 25...Re8 26.Qf4 Nd5+–) 26.Bc5 Nb6 27.Bb6 cb6 28.Qe4 (worse is 28.Re4 Re6 29.Qe6 fe6–+ (29...Qe6?? 30.Re6 fe6 31.Rd1+–)) 28...f5 29.Qe5 Qf7 30.Rd4 Rd4 31.ed4 1–0. Dudkin,Maxim – Elfert,Aleksandr V (2130), Moscow op–B, 2008.

6.c4 e6 7.Nc3 Be7 8.Be2 (8.d4 Nbd7+=) 8...0–0 9.0–0 Nbd7 10.d4 e5 (10...c6 11.bc6 Bc6 12.Bd3=) 11.Qc2+= ed4 (11...Re8 12.de5 de5 13.Rad1+=) 12.Nd4 Nc5 13.Bf3 Qd7 (13...Bf3 14.Nf3 a4 15.Nd5+=) 14.Nc6 (14.Bb7 Nb7 15.Nf5 Rae8+/–) 14...Rfe8 (14...Qe6 15.Na4 Bc6 16.Bc6+/– (16.bc6?! Na4 17.Qa4 Ne4=)) 15.Nd5 (15.Na4 Bd8 16.Nc5 bc5+/–) 15...Nd5 16.Bd5 (16.cd5 Bc6 17.bc6 Qd8+=) 16...Bf6 (16...Qg4 17.Bd4 Bg5 18.Rad1+/–) 17.Bf6+/– gf6 18.a4 (18.Rad1 a4+/–) 18...Qg4 19.Ra3 Rac8 (19...f5 20.e4 f4 21.Rf3+/–) 20.e4 Kh8 21.Bf7 Bc6= 22.bc6 Re7 23.Bd5+/– Rce8 Can e4 get defended? 24.Rg3 Qf4 25.Rf3 Qh6 26.Rh3 Qf8 27.Re1 f5+= Black gets in control 28.Rf3 Qf6= 29.g4 Qg7+= 30.Rf5 Qg4–+ Black creates threats along the open g–file 31.Kh1 Rg7 Threatening mate... how? 32.e5 Reg8! Do you see the mate threat? 33.Qd1 Qf5 34.Bg8 Nd3 35.Rf1 Rg8 36.f4 de5 37.Rf3 Nf4 38.c5 Qe4 (38...Qe4 39.cb6 Nh3 40.Qf1 Qf3 41.Qf3 Rg1#) 0–1. Teichgraber – Squarcialupi, corr, 1969.

6.d4 Nbd7 7.c4 Ne4 8.Nbd2 Ndf6 (8...Nd2 9.Qd2 e5 10.Qc2+=) 9.Bd3 e6 10.0–0 Nd2 11.Qd2 Bf3 12.gf3 Be7 13.Kh1 Qd7 14.Rg1 g6 15.e4 0–0–0 16.Rgc1 (16.Rad1 Kb8+=) 16...Kb8 17.Qe3 h6 18.Rab1 (18.f4 g5+=) 18...Nh5= 19.Ba3?? (better 19.Rg1=) 19...Bg5–+ 20.Qe2 Bc1 (20...Nf4 21.Qc2 Nd3 22.Qd3 Bc1 23.Rc1–+) 21.Bc1 g5 22.Be3 Nf4 23.Bf4 gf4 24.a4 0–1. alddhsfd (1765) – Mutaz_Hamra (1785), lichess.org, 2019.

6.d4 Nbd7 7.Nbd2 g6 (7...e6 8.Bd3+=) 8.Bd3 Bg7 9.0–0 0–0 10.e4 e5 11.de5 Ng4 12.Nc4 Nge5 13.Nfe5 Ne5 14.f4 (14.Ne5 Be5 15.Be5 de5+=) 14...Nd3 (14...Nc4 15.Bg7 Ne3 16.Qe2 Nf1 17.Bf8 Nh2 18.Bh6+=) 15.Bg7+= Kg7 16.Qd3 f6 (16...d5 17.Qc3 d4 18.Qd3=) 17.Rad1 (17.Ne3 Re8 18.Nd5 Bd5 19.Qd5 Re7+=) 17...Qe8 (17...Qe7 18.Rfe1=) 18.Nd2+= Rd8 (18...Qe6 19.a3+=) 19.c4 Rd7 20.Rde1 Re7 e4 seems the pivot of the position 21.Re3 (21.Re2 Qf7=) 21...Kg8 (21...Qd7 22.f5=) 22.Rfe1 Rff7 (22...Qd7 23.f5=) 23.Nf3+= Qa8 (23...Rf8 24.f5+=) 24.Nd4 Rf8 25.f5 Rfe8 Increases the pressure on the backward pawn 26.Ne6 Re6 27.fe6 Re6 28.Qd4 Qe8 29.R1e2 (29.Kf2 Re5+=) 29...Qe7 30.Kf1 Re5 31.Ke1 (31.a3 Qe6+=) 31...Qe6 32.h3 (32.a3 Rh5=) 32...Rc5 33.Rc3 (33.Rf2 Kg7 34.Rc2 Re5=) 33...Re5 34.Rce3 Rc5 ½–½. Hoy,Ralph (2075) – Bucan,Djordje (2125), Bayernliga, 2006.

6.d4 Nbd7 7.Be2 g6 8.0–0 Bg7 9.a4 0–0 10.Nbd2 h5 (10...e6 11.Rb1=) 11.Ng5 Bh6 12.f4 Bg5 13.fg5 Ne4 14.Ne4 Be4 15.Bf3 f5 16.Be4 fe4 17.d5 Rf1 18.Qf1 Qf8 19.Qc4 Qf5 20.Rf1 Qg5 21.Qe4 The mate threat is Qe6 21...Ne5? (better 21...Nc5 22.Qf3 Qf5 23.Qf5 gf5 24.Rf5 Na4+–) 22.Be5+– de5 23.d6! Rc8 (23...cd6 24.Qa8 The nicest combinations are those leading to mate) 24.h4 Qg4 (24...Qg3 25.Qc4 Kh8 26.de7 Qe3 27.Kh2 Qh6+–) 25.Qd5 Kh8 26.de7 Rg8 (26...Qg2 27.Kg2 Rf8 28.ef8Q Kh7 29.Qdg8) 27.Qg8!! Kg8 Decoy to g8 28.e8Q A beautiful mate combination (28.e8Q Kg7 29.Rf7 Kh6 30.Qf8) 1–0. onur604 (2320) – Alphha (2070), lichess.org, 2020.

6.Be2 g6 7.0–0 Bg7 8.c4 0–0 9.d4 d5 10.Nbd2+= Ne4 (10...Nbd7 11.Qc2+=) 11.cd5+– Bd5 12.Ne4 Be4 13.Rc1 Nd7 14.Nd2 Bb7 15.Bf3 Bf3 16.Qf3 Nc5 17.dc5 Bb2 18.Rc2 Bg7 (18...Bf6 19.Nc4 bc5 20.Qc6+=) 19.Rfc1 (19.Qc6 bc5 20.Nc4 Qb8+=) 19...bc5 (19...Qd7 20.cb6 cb6 21.Qc6+=) 20.Ne4 Rb8 (20...Qd3 21.Rc5 Rad8 22.g3+=) 21.a4 f5? (better 21...c4+–) 22.Nc5+– e5 (22...Be5+–) 23.Ne6 (23.Ne6 e4 24.Qg3+– (24.Nd8?! ef3 25.Ne6 Rfe8 26.Ng7 Kg7+–)) 1–0. DEFFM – GuestJNJD, freechess.org, 2019.

6.Be2 g6 7.0–0 Bg7 8.c4 Nbd7 9.d3 Kf8 10.Nbd2 Kg8 11.e4 Nc5 12.h3 (12.Qc2 e5+=) 12...Qd7 (12...Nh5 13.Bg7 Kg7 14.Re1=) 13.a4 (13.e5 de5 14.Ne5 Qf5+–) 13...e5 14.d4 (14.Nb3 Nb3 15.Qb3 Nh5+=) 14...Nce4 (14...ed4 15.e5 de5 16.Ne5=+) 15.Ne4 (15.de5!? de5 16.Ne4 Be4 17.Be5+=) 15...Ne4=+ (worse 15...Be4 16.de5 de5 17.Be5+=) 16.de5 Rc8 (16...Qe6 17.Bd3=) 17.Rb1 (17.Re1 Nc5=) 17...Rd8 18.ed6 Nd6 (18...Bb2 19.Rb2 Qd6 20.Qc2=) 19.Bg7+= Kg7 20.Qd4 f6 21.Rfd1 (21.c5!? Rhe8 22.c6+=) 21...Rhe8 22.Kf1 (22.Qd2 Qe7 23.Nd4 Ne4=+) 22...Qf7 (22...Qe6 23.Qb2 Bf3 24.Bf3 Qc4 (24...Nc4?! 25.Qc3=+) 25.Be2 Qh4–/+) 23.Qh4?? (23.Qc3 Qe6 24.Nd4 Qe5=+) 23...Nf5 (23...Re4 24.Ng5 fg5 25.Qg3–+) 24.Qg4?? (24.Qf4 Rd6=) 24...h5 (better 24...Rd1 25.Rd1 Re4–+) 25.Qf4= Re4 (25...Qe7 26.Re1=) 26.Qc1 Rd1 27.Bd1 (better 27.Qd1!? Nd6 28.c5 bc5 29.Rc1=) 27...Rc4 28.Qd2 (28.Qa3 Qe6–/+) 28...Qe7 (28...Bf3!? 29.Bf3 Ra4 30.Kg1–+) 29.Bb3–/+ Rc5 30.Qb2? (better 30.Ne1!?–/+) 30...Bf3–+ 31.gf3 Nh4 (better 31...Qe5 32.Qe5 fe5–+ (32...Re5?! 33.Rc1–/+)) 32.f4? (better 32.Rd1–+) 32...Nf3 (better 32...Qe4 33.Bd1 Qh1 34.Ke2 Ng2–+) 33.Rd1=+ Qe4 (33...Qe8 34.Qe2 Qe2 35.Ke2–/+) 34.Ba2?? (better 34.Rd7 Kh6 35.Qf6 Rc1 36.Bd1 Nh2 37.Kg1 Qe1 38.Kh2 Qf2 39.Kh1 Rd1 40.Rd1 Qf3 41.Kh2 Qe2 42.Kg3 Qe3 43.Kh2 Qe2 44.Kg3 Qe3 45.Kh2 Qe2=) 34…Nh2 (34...Nh2 35.Kg1 Rc2–+) 0–1. e4_e5_f4 (1715) – NOVAND7 (1725), lichess.org, 2020.

6.Bf6 ef6 7.d4 d5 +=.

5.Nf3 e6

6.a4 Be7 7.Be2 0–0 8.0–0 c5 9.d3 d5 10.Nbd2 Nbd7 11.h3 Qc7 12.c4 e5 13.cd5 Nd5 14.Nc4 f6 15.Qb3 Kh8 16.Nh4 (16.Nfd2 Rad8=) 16...Rfe8 (16...f5 17.Nf3 Bf6 18.Nfd2=) 17.Bh5 g6 18.Be2 Kg7 19.Nf3 Rad8 20.Rac1 Nf8? (20...Nb4 21.Nfd2=) 21.d4?? (better 21.Nfe5!? Ne6 22.Bg4+–) 21...e4 (better 21...ed4!? 22.ed4 Nf4=+) 22.Nfd2+= Nb4 23.Rfd1 Ne6 (better 23...Bd5+=) 24.g4 (24.Na5!? Bd5 25.Nac4+=) 24...Ng5 (24...Bd5 25.Nb1=+) 25.h4= Nf7 (better 25...Nf3!? 26.Bf3 ef3=) 26.g5!+– Bd5 (26...fg5 27.d5 Double attack) 27.dc5 bc5 (27...Qc5? 28.gf6 Bf6 29.Bf6 Kf6 30.Qb2 Kf5 31.Nb3+–) 28.gf6 (28.Qc3 Na2 29.gf6 Kg8 30.Qa5 Qa5 31.Na5 Nc1 32.Rc1 Bd6+–) 28...Bf6 29.Bf6 Kf6 30.Qb2 Ne5 (30...Ke7 31.Nb3+=) 31.Ne5 (31.b6 Qb8 32.Ne5 Qe5 33.Qe5 Re5 34.Rc5 Rb8+–) 31...Qe5+– 32.Qe5 Re5 33.Nc4 (better 33.Rc5!? g5 34.b6+–) 33...Re7? (better 33...Bc4!? 34.Bc4 Ke7=) 34.Na5+– (34.Na5 Ra8 35.Nc4+–) 1–0. e4_e5_f4 (1730) – Benissimo9 (1750), lichess.org, 2021.

6.c4 Bb4 7.a3 Be7 8.d3 0–0 9.Nbd2 d5 10.Be2 dc4 11.Nc4 Qd7 12.a4 (12.Qa4 Nd5+=) 12...Bb4= 13.Ncd2 Nd5 14.Qc2 Rc8 15.0–0 c6 16.Qd1 (better is 16.bc6!? Nc6 17.Nc4=) 16...cb5–/+ 17.Ne5 Qe8 18.ab5 Qb5 19.Ne4 a4 20.Bh5 g6 21.Bf3 a3 22.Bd4 Nd7 23.Ng4 e5 (23...Ba6 24.Qb1 Be7 (24...Qd3?! 25.Ngf6 N7f6 26.Nf6 Nf6 27.Qb4+=) 25.Ngf6 Bf6 26.Nf6 N7f6 (26...N5f6 27.Ba8 Qb1 28.Rfb1 Bd3 29.Rb3+=) 27.Ra3 Nd7–+) 24.Ne5+= Ne5 25.Be5 Bc6 26.d4 a2 27.Be2 Qa4 28.Qa4 Ra4 29.Bc4 Bc3 30.Bd5 (30.Ba2!? Ba1 31.Bd5= (31.Ra1?? Rca8–+)) 30...Ba1–/+ 31.Nf6 Kf8 32.Nh7 (better is 32.Ra1!? Bd5 33.Bd6 Kg7 34.Nd5 Rc1 35.Rc1–+) 32...Ke7–+ 33.Bf6 (33.Ra1 Bd5 34.Nf6–+) 33...Ke8 34.Bc6 Rc6 35.Ra1 Rc1 (better is 35...Rac4 36.g4 Rc1 37.Rc1 Rc1 38.Kg2 a1Q–+) 36.Rc1–/+ a1Q 37.Rf1 Qa2 38.h3 b5 39.Rc1 Rc4 40.Rd1 Qc2 41.Ra1 Ra4 42.Re1 Qd2 43.Rb1 b4 44.Bg5 f5 45.Nf6 Kf7 46.Nd7 Ra2 (46...Qc2 47.Rf1–+) 47.Ne5 Kg7 48.Bh4? (48.Rf1 b3 49.Nf3 Qe2–+) 48...g5 (48...b3 49.Rf1–+) 49.Nf3 (49.Bg3 b3! 50.Kh2–+) 49...Qc2 50.Rb4 (50.Rf1 gh4 51.Ne1 Qc4–+) 50...gh4 51.Rb7 Kf8 52.Rb8 Ke7 53.Rb7 Kd8 54.Nh4 Qf2 55.Kh2 0–1. Urbanaites,Elvira (1880) – Sokolova,Vera (2020), St Petersburg Rudenko mem, 2006.

6.c4 d5 7.a4 dc4 8.Na3 Bb4 9.Nc4 0–0 10.Be2 Ne4 11.0–0 Nd7 (11...c6 12.bc6 Nc6 13.Rc1=) 12.Qc2 (12.Rc1 Nd6+=) 12...Ndf6 (12...Nd6 13.Rac1+=) 13.d3 Nc5 14.Rfc1 Nd5 15.d4 Nd7 16.Bd3 f5 17.Qb3 Qe7 18.Nce5 Ne5 19.Ne5 Rf6 (19...Bd6 20.Ba3+=) 20.e4 (20.Nc6 Qd6+=) 20...Nf4= 21.Nc6 Bc6 22.Rc6 (worse is 22.bc6 fe4 23.Bf1 Raf8–/+) 22...Nd3 23.Qd3 fe4 24.Qe4 Raf8 25.f3 Rg6 26.Rd1 (26.Bc1 Bd6+=) 26...Qg5= Threatening mate: Qxg2 27.g3 Bd6 28.Bc1 Qh5 29.Kg2. Labahn,Thomas – Mani,M, corr BRD–CH, 1990.

6.c4 d5 7.Nc3 Nbd7 8.d4 dc4 9.Bc4 Bb4 10.a3 Bc3 11.Bc3 Nd5 12.Bb2 N7f6 (12...c6 13.0–0+=) 13.0–0+/– Ne4 (13...Rc8 14.Re1+=) 14.Rc1 0–0 15.Qc2 White gets in control 15...Ndf6 16.Ne5 Rc8 17.Bd3 Nd6 18.Nc6 Qd7 (18...Bc6!? 19.Qc6 Nd5+/–) 19.e4+– Nfe8 20.e5 Nf5 21.Bf5 (21.d5 Bc6 22.dc6 Qe7+–) 21...ef5 22.d5 Bc6 23.Qc6 (23.bc6?! Qd5 24.Qf5 Rd8+=) 23...Qc6 24.Rc6 Rd8 25.Rd1 Rd7 26.a4 f6?! (26...Kh8+–) 27.Ba3 (better is 27.e6 Re7 28.Ba3+–) 27...fe5+/– 28.Bf8 Kf8 29.Re6 e4 30.f3 ef3 31.gf3 Kf7 32.Rc6 Nf6 33.d6 Ne8 34.dc7?? The passed pawn on c7 quickly leads to threats (better is 34.Rdc1 Rd6 35.Rd6 Nd6 36.Rc7 Kf6 37.Rc6+–) 34...Rd1+= 35.Kg2 Nc7 36.Rc7 Kf8 37.Rc6 Rd4 38.Rb6 Ra4 39.Ra6 Kf7 40.b6 Rb4 41.Ra5 ½–½. De Visser,Arno – van Egmond, 1998.

6.c4 Be7 7.Be2 0–0 8.0–0 d6 9.d4 Nbd7 10.Nbd2 Ne4 (10...c6 11.a4=) 11.Qc2 f5 12.Bd3 (12.Ne4 Be4 13.Qa4 Rc8+=) 12...Nd2 (12...Ndf6 13.Rfd1=) 13.Nd2+= Qe8 14.e4 Qg6 15.f3 Bg5 16.ef5 ef5 17.Rae1 Qh6 18.Re2 Be3 19.Kh1 Bf4 Do you see the mate threat? 20.h3 Qh4 Threatening mate: Qg3 21.Rg1 Nf6 22.Nf1 Nh5–/+ The mate threat is Ng3 23.Bc1 g6 24.d5+= Rae8 25.Bf4 Qf4 26.Qd1 Bc8 27.Rf2 Re7 28.g3 Qd4 29.Rd2 Qc5 30.Qc2 Re1 31.g4?? Nf4–+ 32.Bf5?? Nh3 33.Rdg2 Ng1 34.Rg1 Bf5 35.gf5 Rf5! 36.Qd2 Rh5 37.Kg2 Rhe5 38.Qd3 Rg5 (38...Rg5 39.Kh3 Qg1 40.Qf5 Qh1 41.Nh2 Qg2 42.Kh4 Qg3) 0–1. Luneau – Schichtel, Wildbad, 1993. (=1.Nf3 Nf6 2.b4 a5 3.b5 b6 4.e3 Bb7 5.Bb2)

6.d4 d6 7.c4 Nbd7 8.Nbd2 (8.Nc3 g6+=) 8...Ne4 (8...g6 9.g3+=) 9.Be2 (9.Ne4 Be4 10.Bd3 Nf6+=) 9...Be7 10.0–0 Ndf6 11.Rc1 0–0 12.Nb1 (12.Bd3 Qd7+=) 12...Nd7 (12...Qd7 13.Nfd2=) 13.Ne1 (13.Nfd2 Nd2 14.Nd2 f5+=) 13...f5 14.f3 Nef6 (14...Bg5 15.Nc2 Nef6 16.Nc3=) 15.Nd3+= Nh5 16.Nf4 (16.Nc3 Qe8+=) 16...Nf4= 17.ef4 g5 (better is 17...Rf6!?=) 18.fg5+/– Bg5 19.f4 Bf6 20.Bf3 Bf3 21.Rf3 Nc5 (21...Qe7!?+/–) 22.Nc3+– (22.dc5?! Bb2 23.Rg3 Kh8=) 22...Ne4 (22...Nb7 23.Re3 Qd7 24.Na4+/–) 23.Ne4 fe4 24.Re3 d5 (24...Bg7 25.Qg4 Qf6 26.Re4 d5+/–) 25.Qg4 Kf7 (25...Kh8 26.Qe6 dc4 27.Rc4 Qe8 28.Qe8 Rfe8+–) 26.Rh3 Rh8 27.Qh5 (27.f5 ef5 28.Qf5 h5+–) 27...Ke7 28.Ba3 Kd7 29.Qf7 Kc8 30.Qe6 Kb8 (30...Kb7 31.Kf1 dc4 32.Rc4+–) 31.cd5 Bd4 32.Kf1 Re8 (32...Qe8 33.Qe8 Re8 34.Rc4+–) 33.Qc6 Bc5 (33...Ra7+–) 34.Bc5 bc5 35.Rh7 (better is 35.Rb1 Qd6 36.Qe8 Kb7 37.Qc6 Qc6 38.bc6 Ka6 39.Rh7+–) 35...Rf8 (35...Re7 36.Re7 Qe7+–) 36.b6 Rf4 37.Kg1 1–0. Lunin,Mikhail – Vasiliev,Aleksey, Zhukovsky A, 2010.

6.d4 Be7 7.a3 0–0 8.Be2 h6 (8...c6 9.0–0=) 9.Nbd2 Nh7 (9...c6 10.0–0=) 10.0–0+= Bf6 (10...Nf6 11.c4+=) 11.c4+/– Re8 12.Qc2 Ng5 13.Ng5 Bg5 14.Nf3 Bf6 15.Rfd1 d6 16.Rac1 Nd7 17.a4 Rc8 18.Qb3 d5 19.cd5 Bd5 20.Bc4 Bf3 21.gf3 Bh4 22.f4 Nf6 23.Be2 Ne4 24.Rf1 Nd2 25.Qc2 Nf1 26.Bf1 Qd5 27.Bg2 Qf5 28.Qc3 Qg4–/+ 29.f3 Qg6 30.Kh1 Bf6 31.Rg1 Qh5 32.e4 Bh4 33.d5 e5 34.fe5 Bf2 35.e6+= f6 36.Rf1 Bc5 37.Qd2 Bd6 38.h3 Qh4 39.Qf2 Qf2 40.Rf2+= Bc5 41.Rc2 Be3 42.Rc6 Bg5 43.Kh2 Kh7 44.Kg3+– Kg6?? 45.Kf2 h5 46.Bc3 Bh4 (46...Bh4 47.Ke3 Bg3+–). Fournier,Frederic – Harison, Partie evaluee, 3m + 0s, 2008.

6.Be2 d5 7.a4 Bd6 8.0–0 c5 9.d4 c4 10.c3 Nbd7 11.Nbd2 Qe7 12.Ne1 0–0 13.Nc2 Kh8 14.Re1 Rg8 15.f3 (15.Ba3 Ba3 16.Ra3 e5=) 15...g5 (15...Rac8 16.e4=) 16.g3 (16.e4 de4 17.fe4 Ne4 18.Nc4 Ndf6+=) 16...g4 (16...Rac8 17.e4 de4 18.fe4 Ne4 19.Nc4=) 17.f4 (17.fg4 Rac8+=) 17...h5 (17...Rac8 18.Ba3=) 18.e4+= Bc7 (18...de4 19.Nc4 Rac8 20.Nd6 Qd6 21.Ba3+–) 19.e5 (19.ed5 Nd5 20.Bc4 Rgd8+–) 19...Nh7 20.Ne3 f6 21.Ng2 (21.Ba3 Qg7+=) 21...Rg7 22.Nf1 Rag8 23.Ba3 Qf7 24.Nfe3 fe5 25.de5 Ne5 26.fe5 Be5 (26...Ng5 27.Rf1 Nh3 28.Kh1 Nf2 29.Rf2 Qf2 30.Qd2=) 27.Rf1+– Nf6 28.Qc2 (28.Qe1 Qe8+–) 28...Qg6+= 29.Qg6 Rg6 30.Rac1 Ne4 31.Bb2 Bc8 (31...Nc5 32.Ra1 Kg7+=) 32.Nc2 (32.Nf4 Rh6=) 32...Bd7 (32...Nc3!? 33.Bd1 Kh7–/+) 33.Nd4= Bd4 (better 33...Rf6!?=) 34.cd4+– Be8 (34...Rf6 35.Rf6 Nf6 36.Nf4+–) 35.Rfe1 Rf6 36.Bc4! Rgf8? (36...dc4 Theme: Deflection from e4 37.Re4) 37.Bd3 (37.Re4 de4 38.d5 ed5 39.Bd5 Kh7 40.Be4 Kh6 41.Bf6 Rf6+–) 37...Rf2?? (better 37...Nf2 38.Nf4 Rf4 39.gf4 Nd3 40.Re6 Bf7 41.Rb6 Nb2+=) 38.Be4 (38.Ba3 Ng5 39.Bf8 Nh3 40.Kh1 Rf8+–) 38...de4 (38...Rb2 39.Bd3 Bf7+–) 39.Bc3 (39.Bc3 Ra2 40.Re4+–; 39.Ba3 R8f3 40.Rc8 Rg2 41.Kg2 Ra3 42.Re8 Kg7 43.Re4 Ra4 44.R8e6 Ra2 45.Re2 Ra4+–) 1–0. BeepBeepImAJeep (2660) – Wako89 (1805), lichess.org, 2015.

6.Be2 d5 7.c4 Be7 8.0–0 0–0 9.d4 Nbd7 10.a4 c5 11.Nbd2. DEFFM – GuestLJPG, freechess.org, 2016.

6.Be2 Be7 7.0–0 0–0 8.c4 d6 9.Qc2 Re8 10.Nc3 Bf8 11.d4 Nbd7 12.Rfd1 Qc8 13.Rac1 c5 14.bc6 Bc6 15.Qb1 Qb8 16.h3 e5 17.Ba3 Ra7 18.Nb5 Bb5 19.cb5 (19.Qb5 Qc7+/–) 19...e4+= 20.Nd2 d5 21.Bf8 Nf8 22.Rc6 Ne6 23.Rdc1 Rae7 24.Qb2 Rc7 25.Rc7 Nc7 26.Nb1 Ne6 27.Nc3 Rc8 28.Na4 Nd7 29.Rc6 f5?? (better is 29...Nd8 30.Rc8 Qc8+=) 30.Re6+– 1–0. Kalashnikov,Konstantin (2415) – Kornienko,Sergey (2190), RUS–chT2, 2003.

6.Be2 Be7 7.0–0 0–0 8.d4 Ne4 9.Nfd2 f5 10.c4 d5 (10...Bd6 11.Ba3=) 11.Nc3+= Nd7 12.Nde4 de4 13.Qb3 Rf6 14.Rad1 (14.f3 ef3 15.Bf3 Bf3 16.Rf3 Bd6+=) 14...Bd6= 15.g3 Qe7 16.Na4 (16.a3 c5+=) 16...Rh6 (16...Rf7 17.f3=) 17.f4 (17.Rc1 Rd8=) 17...ef3 (17...Rd8 18.Qc2 Rc8 19.Rc1=) 18.Bf3 Rh2? (better is 18...Bf3!? 19.Rf3 Qg5=) 19.Bb7+/– Bg3 (19...Qg5 20.Rf2 Qg3 21.Rg2 Rg2 22.Bg2 Nf6+=) 20.c5?? (20.Bg2 Qg5 21.Rd2 Rd8+–) 20...Kh8?? (20...Qh4 21.Qe6 Kh8 22.Qf5 Rb2–+) 21.Rf5?? (better is 21.Bg2 Re8 22.a3+–) 21...ef5–+ 22.Ba8 (22.Bg2 Qg5 23.Rd2–+) 22...Qh4 23.Qe6 Rh1 (23...Rh1 24.Bh1 Qh2 25.Kf1 Qf2) 0–1. Parr,David – Franklin,Michael, Islington, 1972.

6.Be2 Be7 7.a4 d6 8.0–0 Nbd7 (8...0–0 9.Nc3=) 9.d4 (9.Nd4 0–0=) 9...c5 (9...Rc8 10.Nbd2=) 10.bc6 Bc6 11.Nc3 (11.c4 Rc8=) 11...0–0 12.Nb5 Nd5 (12...Ne4 13.Rb1=) 13.c4+= Nc7 (13...Nb4 14.Ba3+=) 14.Rc1 (14.Bd3 Nf6+=) 14...Nb5 15.cb5 Bb7 (15...Bd5 16.Nd2+=) 16.Nd2 (16.Bd3 f5+=) 16...Rc8= 17.Qb3 (17.Bd3 Rc1 18.Qc1 Nf6=) 17...Rc1 (17...Nf6 18.Qd3=) 18.Rc1+= Qb8 19.Bf3 (19.Bd3 Rc8+=) 19...d5 (19...Bf3 20.Nf3 Nf6 21.Ba3=) 20.Ba3+= Bd6 (20...Ba3 21.Qa3 Rc8 22.Rc8 Qc8 23.Qe7+=) 21.g3 Nf6= 22.Be2 Rc8 23.Rc8 Bc8 24.Kg2 Ba3 25.Qa3 Qc7 26.Bd3 Bb7 27.f3 g6 28.Nb1 Kg7 29.Qc3 Qc3 30.Nc3 Kf8 31.g4 g5 32.Kg3 h6+= 33.h4 Nd7 34.f4 f6 35.Bc2 Ke7 36.f5 e5 37.Bb3 Kd6 38.Bd1 Ba8 39.Ne2 e4 40.Kh3 Bb7 41.Ng3 Ke7 42.Bb3 Ba8 43.Kg2 Bb7 44.Nh5 Kf7 45.Kh3 ½–½. Lipok,Erik (2000) – Eichinger,Hans (1815), Niederbayernliga, 2007.

6.Rg1 Be7=+ 7.g4 (better 7.Nc3=+) 7...Ne4 (better 7...0–0!?=+) 8.Bg7+= Rg8 9.Bb2 Bf6 (9...Bh4 10.Rg2 Nf2 11.Rf2 Bf2 12.Kf2 Rg4 13.h3+=) 10.d4 (10.Bf6 Qf6 11.d4 h5+–) 10...d5 (10...Bh4 11.Rg2+=) 11.c4 (11.Nbd2 a4 12.a3 Nd7+–) 11...Nd7 (11...Bh4 12.Rg2 Be7 13.Nc3+=) 12.a4 (12.Nfd2 h5+–) 12...Be7 (12...Bh4 13.Rg2+=) 13.cd5 (13.Ba3!?+–) 13...Bb4= 14.Nbd2 ed5 (14...Qf6 15.Qe2 Bd5 16.Kd1=) 15.Bd3 (15.Ba3 Bc3 16.Rc1 Ndf6+–) 15...Ndf6 16.g5 Nd2 (16...h6 17.h4+=) 17.Nd2+– Ne4 18.Be4 de4 19.Qh5 Qe7 (19...Qd5+=) 20.Qg4 (20.h4!?+–) 20...Bd5 (20...h6 21.h4 hg5=) 21.Rc1 (21.Qf5 Rd8+=) 21...Rd8 (21...Bd2!? 22.Kd2 Qb4 23.Bc3 Qa4=+) 22.Qf5 (22.Bc3 Ba3 23.Rc2 h6+=) 22...Rg6 (22...h6 23.h4+=) 23.h4 (23.Bc3 Ba3 24.Rc2 c6+=) 23...c6 (23...Bd2 24.Kd2 Qb4 25.Bc3 Qa4 26.h5+=) 24.Bc3 (24.h5 Qe6 25.Qg4 f5+=) 24...cb5 (24...Ba3 25.Rb1+=) 25.ab5 (better 25.Bb4 Qb4 26.h5+–) 25...Re6? (25...Ba3 26.Ra1+=) 26.Ke2?? (26.Bb4 Qb4 27.Qh7 Qb5 28.Rc7+–) 26...Ba3+– 27.Qh7 (better 27.Ra1!? Rg6 28.h5+–) 27...Bc1=+ 28.Rc1 Rc8?? (28...Qd7 29.Rb1=+) 29.Qg7?? (29.Bb4 Rc1 30.Be7 Ke7+–) 29...Bc4?? (29...Ra8 30.Ra1=) 30.Ke1?? (30.Nc4!? Rc4 31.d5 Rg6 32.Qh8 Qf8 33.Qf8 Kf8 34.Bg7 Kg7 35.Rc4 Rd6+–) 30...a4? (30...Bb5 31.d5 Rd6 32.Qg8 Kd7 33.Qc8 Kc8 34.Bf6 Kd8 35.Be7 Ke7 36.Rc7 Kf8 37.Ne4 Rd5+–) 31.h5 (better 31.Bb2 Rg6 32.Qe5+–) 31...a3?? (better 31...Bd5!? 32.Qg8 Kd7 33.Qc8 Kc8 34.Bb4 Qc7 35.Rc7 Kc7+–) 32.h6 (better 32.Ba1 Kd7 33.Rc4 (33.Nc4?! Qb4 34.Bc3 Qc4 35.Qf7 Re7 36.Qc4 Rc4+–) 33...Rc4 34.Nc4 Qb4 35.Nd2+–) 32...Rg6 33.Qh8?? (better 33.h7 Rg7 34.h8Q Qf8 35.Qf8 Kf8 36.Bb4 Kg8 37.Ba3 (37.Nc4? a2 38.Ra1 Rc4–+; 37.Rc4?! Rc4 38.Nc4 a2=+) 37...Rg5 38.Rc4 Rc4 39.Nc4 Rb5 40.Nd6+–) 33...Kd7= 34.Qe5? (better 34.Qc8! Kc8 35.h7=) 34...Qe5 (34...Qg5 35.Qg5 Rg5 36.Ne4–/+) 35.de5 Rg5 36.Ne4 Rh5?? (better 36...Rg1 37.Kd2 Rc1 38.Kc1 Bd3 39.Nf6 Ke6–/+) 37.Nf6+– Ke6 38.Nh5 a2 (38...Kf5 39.Nf6 Bb5 40.h7+–) 39.Nf4 (39.Ba1!? Rg8 40.h7 Rh8 41.Rc4 Rh7+–) 39...Kf5 40.e6! fe6 (40...Be6 41.Kd2 Combination; 40...fe6 41.h7 Passed pawn) 41.h7 (41.Ba1 Rc7 42.Nd3 Kg5+–) 41...e5 42.Ne2 (better 42.Bb2!? Rh8 43.Rc4 Rh7+–) 42...Bb5 (42...Rh8 43.Ng3 Ke6 44.Ne4+–) 43.Kd2 (43.e4 Ke4 44.f3 Kf3 45.Be5 Re8 46.Nd4 Ke4+–) 43...Rd8 (43...Rh8 44.Rh1 Be2 45.Ke2 Kg6+–) 44.Ke1 (44.Nd4 ed4 45.Bd4 Bc4+–) 44...Rh8?? (44...Rc8 45.e4 Ke4 46.f3 Kf3 47.Be5 Ra8 48.Nd4 Ke4+–) 45.Ng3+– Kg4 46.Be5 (better 46.Rc2 Rh7 47.Ra2 Re7+–) 46...Rh7 47.Ra1 (better 47.Bd4+–) 47...Rh2?? (47...Bc4+–) 48.Ra2 Bc6 (48...Rh6 49.Rb2 Bc4 50.f3 Kf3 51.Rf2 Kg4 52.Rf4 Kg3 53.Rf6 Kg4 54.Rh6+–) 49.Bf4 (better 49.f3 Kh3 50.Ne2 Rh1 51.Kf2 Kh4 52.Bf6 Kh5 53.Ng3 Kg6 54.Nh1 Kf6+–) 49...Bf3 (49...Kf3 50.Bc7 b5 51.e4+–) 50.Ra7 (50.Rb2 Rg2+–) 50...Rg2 (50...Bc6 51.Ra6+–) 51.Rg7 (51.Kf1 Bd5 52.Ne2 Kf5+–) 51...Kh4 (51...Kh3 52.Kf1+–) 52.Rh7 (52.Rh7 Kg4 53.Kf1+–) 1–0. FeegLood (2670) – titanos444 (2360), lichess.org, 2015.

5.Nf3 g6

6.a4 Bg7 7.d4 0–0 8.Nbd2 c6 9.c4 cb5 10.ab5 d6 11.Be2 Nbd7 12.0–0 Rc8 13.Qc2 d5 14.Ba3 White prepares the advance c5 14...Ne4 (14...dc4 15.Nc4 Ne4 16.Rfc1+=) 15.Ne4 de4 16.Nd2 f5 17.Rad1 Re8 18.c5 Bd5 19.c6 Nf6 20.Nc4 Qc7 21.Ne5 e6 22.h3 Bf8 23.Bf8 Rf8 24.Rc1 g5 25.Rfe1 f4 26.Qd2 f3 27.gf3 ef3 28.Bd3 (worse 28.Nf3 Ne4 29.Qc2 Nf2=+) 28...Ne4? (better 28...Be4+–) 29.Qc2 Nd6 (29...Ng3 30.e4 (30.fg3?! f2 31.Qf2 Rf2 32.Kf2 Rf8 33.Kg1 Rf3+–) 30...Be4 31.Be4 (31.fg3 f2 32.Kh2 fe1R 33.Re1 Bd3 34.Qd3 Rcd8=+; 31.Re4?! Ne4 32.Be4 Rf4+–) 31...Ne2 32.Re2 fe2 33.Qe2+–) 30.e4 Rf4 (30...Ne4 31.Be4 (31.Re4?! Be4 32.Be4 Rf4+–) 31...Rcd8 32.Qd3+–) 31.ed5 ed5 32.Nd7 Rh4 (32...Kh8 33.Qb3 Nc4 34.Bc4 dc4 35.Qc3+–) 33.Nf6 Kh8 34.Nd5 Qg7 Black intends g4 (34...Qf7 A) 35.Nb6 Rh3 36.Re7 Qf4 (36...Qe7?! 37.Qc5 Re8 38.Qe5 Qe5 39.de5 Re5 40.c7–/+) 37.Re8 Re8 38.c7 Qh2 39.Kf1 Qg2; B) 35.Re5 Rh3 36.Bf5=) 35.Nb6 g4 (35...Rg8 36.d5 g4 37.Qc3 Qc3 38.Rc3 Rh3 39.Bf1+–) 36.Nc8 gh3 37.Bg6 Qf6 Threatening mate: Qg5 38.Re5 Rg4 (38...Nc8 39.Qf5 Qg6 40.Qg6 hg6 41.Re8 Kg7 42.Rc8 Rg4 43.Kh1 Kf7+–) 39.Kh1 Rg6 (39...Nc8 40.Re8 Kg7 41.Bh7 Rg2 42.Rc8 Qd6 43.Rg8 Kh6 44.Qg6 Qg6 45.Bg6 Rg5 46.c7 Rg6 47.Rg6 Kg6 48.c8Q Kg5 49.Rc5 Kf6 50.Qa6 Ke7 51.Rc7 Kd8 52.Qc8) 40.Nd6 Qd6 41.c7 (41.c7 Rg1 42.Rg1 Qg6 43.c8Q Kg7 44.Re7 Kh6 45.Qg6 hg6 46.Qh3) 1–0. onur604 (2320) – mastermind100 (2340), lichess.org, 2020.

6.c4 Bg7 7.Be2 0–0 8.0–0 c6 9.a4 Qc7 10.g3 (10.d4 d6+=) 10...d5 11.Na3 Nbd7 12.Rc1 c5 13.d4 Ne4 14.Nd2 Ng5 15.Rc2 dc4 16.Ndc4?? (better is 16.Nf3 c3 17.Bc3=) 16…Nh3 0–1. Vaast,Jean – Gaudron,Fanny (1950), FRA–chT, 2000.

6.c4 Bg7 7.Be2 d6 8.d3 Nbd7 9.Qc2 h6 10.Nc3 e6 11.0–0 0–0 12.d4 Qe7 13.Rad1 Rac8 14.h3 Nh5 (14...c6 15.bc6 Bc6 16.e4+=) 15.Nd2 Qh4 (15...Nhf6 16.e4+=) 16.Bf3 Ba8 17.Bg4 f5 18.Nf3 Bf3 19.Bf3 g5 (19...Nhf6 20.a3+–) 20.Rfe1 g4 (20...Nhf6 21.Bc6+–) 21.Bc6 (21.hg4!? fg4 22.Qe4+–) 21...Rcd8+– 22.hg4 fg4 23.g3 Ng3? (better 23...Qe7!?+–) 24.fg3+– Qg3 25.Qg2 Qh4 (25...Qg2 26.Kg2 Nf6 27.Rh1+–) 26.Rf1 Nf6 27.Ne2 Nh5 28.Bc3 d5 (28...Bf6+–) 29.cd5 ed5 (29...Qg5 30.Rf8 Rf8 31.Rd3+–) 30.Rf8 (30.Bd5 Kh7+–) 30...Rf8 31.Qd5 Kh8 32.Rf1 Rf1 33.Kf1 Ng3 (33...Qh3 34.Ke1 Nf6 35.Qd8 Kh7 36.Qc7 Qe3 37.Qb6 Ne4 38.Be4 Qe4 39.Qa5 g3+–) 34.Ng3 Qg3 (34...Qe7+–) 35.Qd8 (35.Qd8 Bf8 36.Qf8 Kh7 37.Be4) 1–0. Janek – Ccvmep, internet, 2019.

6.c4 Bg7 7.Be2 d6 8.d4 e6 9.0–0 0–0 10.Nc3 Nbd7 11.Rc1 e5 12.de5 de5 13.Na4 (13.Qc2 e4 14.Nd4 Qe7+=) 13...Qe7= 14.Qc2 c5 15.bc6 Bc6 16.Qb3 Qb4 17.Nc3 Nc5 18.Qc2 Nfe4 (18...Rae8!?=) 19.Nd5+/– Bd5 20.cd5 f6 21.a3 (21.Rfd1 Qa4 22.Nd2 Qc2 23.Rc2 Nd2 24.Rcd2 Rfd8+/–) 21...Qa4+= 22.Qc4 (22.Rfd1 Qd7+=) 22...Qc4 23.Bc4 Nd6 24.Nd2 Rfc8 25.Be2 b5 26.f4 b4 27.Nc4 (27.fe5 fe5 28.Bg4 Bh6=) 27...Nc4 28.Bc4 Na4 29.Ba1 Nc3 30.ab4 ab4 31.Bc3 Rc4 32.Bd2 Rac8 (better is 32...Rc1!? 33.Rc1 ef4 34.ef4 b3+=) 33.Rc4+/– Rc4 34.fe5 fe5 35.d6 Bf8 36.d7 (36.Rf6 b3 37.d7 Be7+=) 36...Be7= 37.Rb1 Rc7 38.Bb4 Rd7 39.Be7 Re7 40.Kf2 Kg7 41.Kf3 h6 42.Ke4 Kf6 43.h4 h5 44.Rb5 Re6 45.Kd5 Ra6 46.e4 g5 47.hg5+/– Kg5 48.Ke5 Ra2 49.Kd6 Kg6 50.Rb8 h4 51.Rh8 Kg7? 52.Rh4+– Rg2 53.e5 Ra2 54.Ke6 Ra6 55.Kf5 Ra1 56.Rd4 Kf7 57.Rd7 Ke8 58.Rb7 Ra2 59.Kf6 Rf2 60.Ke6 Kd8 61.Rb8 Kc7 62.Rg8 Rf1 63.Ke7 Rf2 64.e6 Rh2 65.Rg7 Rf2 66.Rg4 Rc2 67.Ke8 Rc1 68.e7 1–0. Krivoshapko,Alexander – Mikhailovsky,Viktor, Final Omsk, 2010.

6.d4 d6 7.Bd3 Bg7 8.Nbd2 Nbd7 9.Nc4 0–0 10.Qe2 Ne4 11.0–0 Qe8 12.Rad1 (12.Be4 Be4 13.Ncd2 Bb7 14.e4 e6 15.c4 f5 16.Rae1+=) 12...e5 (12...a4 13.a3+= f5 14.Ncd2 Ndc5 15.Bc4 e6 16.Qe1=; 12...f5 13.Ncd2 Ndc5 14.Bc4 d5 15.Ba1 Nd2 16.Nd2=) 13.de5 de5 14.Be4 Be4 15.Ba3 Nc5 16.Bc5 bc5 17.a4 Qe7 18.Rd2 g5 (18...Rfd8!?+=) 19.Rfd1+/– g4 20.Ne1 Bf5 21.Nd3 Rfe8 22.e4 Bc8 23.Nc1 Bh6 24.Rd5 Be6 25.Re5 Bg7 26.Rh5 Bc4 27.Qc4 Qe4 28.Rc5 Bd4? 29.Rc7+– Re7 30.Rc6 Rae8 31.Qf1 g3 32.hg3 Qg4 33.Rd6 Bc5 34.R6d5 Bb6 35.c4 Re5 36.Re5 Re5 37.Nd3 Rh5 38.Nf4 Rh6 39.Rd3 Bc7 40.Qd1 Qf5 1–0. Poley,Vladimir (2330) – Sanchez,Nicolas (2155), 1st Open, Condom FRA, 2002.

6.Be2 Bg7 7.0–0 0–0 8.c4 c6 9.d4 d5 10.Nc3 Nbd7 11.cd5 cd5 12.Na4 Rc8 13.Rc1 Ne4 14.Bd3 Nd6 (14...Rc1 15.Qc1 Qb8 16.Ne5 Ne5 17.de5 Be5 18.Be5 Qe5 19.Nb6=) 15.Qb3 Nf6 16.Ne5 Nfe4 17.Rfd1 Rc1 18.Rc1 e6 19.f3 (19.Ba3 Re8+/–) 19...Nd2 20.Qd1 (20.Qc2 N2c4 21.Nc4 dc4 22.Bc4 Bh6+/–) 20...N2c4+= 21.Nc4 Nc4 (21...dc4 22.Bc4 Nc4 23.Rc4+=) 22.Bc4+/– dc4 23.Rc4 Qg5 24.Nb6 Qe3 25.Kf1 (25.Kh1!?+=) 25...Qf4= 26.d5 (better is 26.Kg1!?=) 26...Qh2–/+ 27.Bg7 Qh1 (worse is 27...Kg7 28.Qd4 e5 29.Qc3+/–) 28.Ke2 Qg2 29.Ke3 Kg7 30.Qd4 Kg8 31.Nd7 Qg1 (31...ed5!? 32.Nf6 Kh8+=) 32.Kd2= Qd4 33.Rd4 Rc8 (worse is 33...ed5 34.Nf8 Kf8 35.Ra4+/–; 33...Bd5? 34.Nf8 Bf3 35.Nd7+–) 34.d6 (34.de6 fe6 (34...Bf3? 35.ef7 Kf7 36.Ne5 Kf6 37.Nf3+–) 35.f4 Kg7+=) 34...Rd8+= (worse is 34...Bf3 35.Ne5 Bd5 36.Nc6 Rc6 37.bc6 Bc6 38.d7 Bd7 39.Rd7+/–) 35.Nc5 Bd5 (35...Bf3 36.Ke3 Bd5 37.d7–/+) 36.d7= Kf8 37.Ra4 Ra8 38.Ra5+/– Ke7?? 39.Ra8+– Ba8 40.a4 h5 41.Ke3 g5? 42.Kf2 h4 43.a5 f5 44.a6 g4 45.fg4 fg4 46.b6 g3 47.Kg1 Bc6 48.b7 h3 49.d8Q! (49.d8Q Kd8 50.b8Q Ke7 51.Qc7 Kf6 52.Qc6 h2 53.Kg2 h1Q 54.Kh1+–) 1–0. Puentes,Alvaro (2100) – Ospina Ortiz,Oscar Alexander (1950), Ortega COL, 3rd Open, 2013.

6.Be2 Bg7 7.0–0 0–0 8.d4 d6 9.c4 Nbd7 10.Nbd2 e5 11.de5 de5 (11...Ne8 12.Qc2 de5 13.Ne4+=) 12.Ne5+– (12.Be5?! Ne5 13.Ne5 Ne4 14.Ne4 Be5=) 12...Ne5 13.Be5 Qe7 14.Bd4 Rad8 15.Re1 (15.Bf3 Ne4 16.Bg7 Kg7 17.Be4 Be4+–) 15...Rfe8 (15...Ne4 16.Ne4 Be4 17.f3+–) 16.Bf3 (16.Qb3 Rd7+–) 16...Bf3 17.Nf3 Ne4 18.Rc1 (18.Qe2 Qe6+–) 18...h5 (18...Ng5 19.Ng5 Qg5 20.Qd3+=) 19.Qc2 Ng5 20.Ng5 Bd4 21.Nf3 Bc5 22.Red1 h4 23.h3 Qf6 24.Rd5 Rd5 (24...Rc8 25.Rcd1+–) 25.cd5 Kg7 26.a4 Kh6 27.Qc4 g5 28.Re1 Qf5 29.e4 Qf4 30.Re2 g4 (30...Kg7 31.Qc2+–) 31.Nh4 gh3 32.Nf5 Kh7 33.Qc3 (33.gh3 Qf3 34.Re3 Rg8 35.Kf1 Qd1 36.Re1 Rg1 37.Kg1 Qe1 38.Qf1 Bf2 39.Kg2 Qe4 40.Kf2 Qf5 41.Kg1 Qf1 42.Kf1 Kg6=) 33...hg2?? (33...h2 34.Kh1 Re5+–) 34.Qg7 1–0. DEFFM – GuestTHJW, freechess.org, 2018.

6.Be2 Bg7 7.0–0 0–0 8.d4 d6 9.Nbd2 Nbd7 10.c4 Re8 11.Qb3 e5 12.de5 de5 13.Rfd1 a4 14.Qc2 Qe7 15.a3 e4 16.Nd4 Nc5 17.Qc3 (17.Nb1 Nfd7 18.Nc3 Ne5=+) 17...Rad8 18.Nf1 (18.Qc2 Nfd7–/+) 18...Rd6–/+ 19.Rac1 Red8 20.Ng3 R8d7 (20...h5 21.h3–/+) 21.Qb4 (21.Rc2 h5 22.Rcd2 h4–/+) 21...h5 22.Rd2 h4 23.Ngf5 (23.Nf1!?–/+) 23...gf5–+ 24.Nf5 Qd8 (24...Qe6!? 25.Nd6 cd6–+) 25.Nd6–/+ Rd6 26.Rd6 Qd6 27.Rd1 Qe6 (27...Qe7 28.Bc3–/+) 28.Rd8 Kh7 29.Qc3 (better 29.h3–/+) 29...h3?? (better 29...Ne8 30.Qc1 Nd6–+) 30.Qe5= hg2?? (better 30...Qe5 31.Be5 Ne6=) 31.Qg3+– Qf5?? (31...Ncd7 32.Qf4 c5+–) 32.Qh4 Kg6 33.Bf6 (33.Bf6 Nd3 34.Bg7 Qf2 35.Qf2 Nf2 36.Kf2 Kg7 37.Rb8+–) 1–0. DEFFM – GuestBFHQ, freechess.org, 2019.

6.Be2 Bg7 7.c4 0–0 8.0–0 d6 9.a4 e5 10.d4 e4 11.Nfd2 Nbd7 12.Nc3 Re8 13.Rc1 c6 (13...Rc8 14.Qb3+=) 14.Qc2 d5 (14...c5 15.d5+–) 15.bc6 Bc6 16.cd5 Bd5 (16...Nd5!? 17.Nde4 Nc3 18.Nc3 Rc8+–) 17.Nd5+– Nd5 18.Ne4 Rc8 19.Qb1 Nb4? (better 19...Qe7 20.Bf3 h6+–) 20.Rc8 Qc8 21.Nd6 Qd8 22.Ne8 Qe8 23.Ba3 Qe7 24.Bb5 Nf6 25.Rc1 Nfd5 26.h3 (better 26.Rc8 Bf8 27.Qb3+–) 26...f5 (26...Bf8+–) 27.Bc4 f4 (27...Bf6 28.Bd5 Kg7 29.Bb4 ab4 30.Rc6+–) 28.Bd5 Nd5 (28...Kh8 29.Rc8 Bf8+–) 29.Be7 Ne7 30.Qe4 (30.Qe4 Bf6 31.Qf4+–) 1–0. BeepBeepImAJeep (2640) – Wako89 (1740), lichess.org, 2015.

6.d4 Bg7

7.Bd3 0–0 8.0–0 c5 9.c4 d5 10.Nbd2 (10.dc5 bc5 11.Nbd2 Qd6+=) 10...Nbd7= 11.Rc1 Rc8 12.a4 Re8 (12...e6 13.cd5 Nd5 14.Nc4=) 13.Re1 (13.cd5 Nd5 14.Bc4 cd4 15.Bd5 Bd5 16.Rc8 Qc8 17.Bd4 e5=) 13...e6 (13...cd4 14.ed4 (14.Bd4? e5–+) 14...Nh5 15.cd5=) 14.Nb3 (14.cd5 Nd5 15.Nc4 cd4 16.Bd4 Bd4 17.ed4 N7f6=) 14...dc4 (14...cd4 15.Nfd4 (worse 15.Bd4 e5–/+) 15...dc4 16.Rc4 Rc4 17.Bc4=) 15.Bc4= cd4 16.Bd4 Nd5 (16...Qe7!?=) 17.Bg7+= Kg7 18.e4 Nb4 19.Qe2 Qe7 20.Qe3 (20.Red1 Rc7+=) 20...Nc5 (20...Na2 21.Rc2=) 21.Nc5+= Rc5 22.Rc3 Rd8 (22...Rec8 23.Rec1=) 23.Rec1+= Qd6 24.Be2 Rc3 25.Qc3 Kg8 26.Qe3 Rc8 (better 26...e5!?+=) 27.Rc8+– Bc8 28.Nd2 Nc2 (28...e5 29.Nc4 Qd4 30.Qd4 ed4 31.Nb6+–) 29.Nc4+– Qb4 (better 29...Qd4 30.Qd4 Nd4+–) 30.Qd3 Qe1 (30...Qa4 31.Nb6 Qa1 32.Bf1+–) 31.Bf1 Nb4 32.Qd8 Kg7 33.Nd6 (33.Qc8 Nd3 34.h3 Qf2 35.Kh2 Ne1–/+; 33.Nb6 Na2 34.Nc8 Nc3+–) 33...Nd3 (33...e5 34.Nc8 Na2+–) 34.Ne8 Kf8 35.Nc7 (35.Qd3?! Ke8 36.Qd4 Bb7+–) 35...Kg7 36.Qd3 1–0. onur604 (2275) – owl77 (1995), lichess.org, 2020.

7.Bd3 0–0 8.0–0 d6 9.a4 Nbd7 10.Nbd2 Re8 11.e4 e5 12.de5 de5 13.Ba3 Nc5 Pawn e4, live or die! (13...Bf8!?=) 14.Bc5+= bc5 15.Qe1 Qe7 (15...Ra7 16.Nb3 c4 17.Bc4 Ne4 18.Qe3=) 16.Nc4+– Nd7 1–0. DEFFM – GuestBTPF, freechess.org, 2019.

7.Bd3 0–0 8.0–0 d6 9.Nbd2 Nbd7 10.e4 e5 11.de5 Ng4 12.Nd4 Nge5 13.f4 Nd3 14.cd3 Nc5 15.Qc2 Qd7 16.a4 Rac8 (16...Rfe8 17.Rae1=) 17.N2f3 (17.f5 Bf6=) 17...Rfe8 18.f5 Ne4?? (better 18...d5 19.e5 Be5 20.Ne5 Re5+–) 19.de4+– Be4 (19...Re4 20.Rae1 Re1 21.Re1+–) 20.Qb3 Bf5? (20...d5 21.fg6 hg6 22.Nc6+–) 21.Nf5 Qf5 (21...Bb2 22.Nh6 Kg7 23.Qb2 Kh6+–) 22.Ng5 Qc5 23.Kh1 Rf8 (23...Re7 24.Qh3 Qg5 25.Qc8 Bf8+–) 24.Rf7 Rf7 (24...Kh8 25.Rg7 Rf1 26.Rf1 Qg1 27.Kg1 d5 28.Nf7) 25.Qf7 (25.Qf7 Kh8 26.Qg7) 1–0. DEFFM – GuestTDVS, freechess.org, 2019.

7.Bd3 0–0 8.0–0 d6 9.Nbd2 Nbd7 10.e4 Re8 11.a4 e5 12.de5 Ne5 13.Ne5 de5 14.Qf3 Nd7 15.Bc4 Qe7 16.Rad1 Nc5 (16...Rad8!?+=) 17.Ba3+– Rad8 (17...c6 18.Bc5 bc5 19.b6+–) 18.Bc5+– bc5 19.Nb3 (19.Nb3 Rd1 20.Rd1+– (20.Qd1?! Be4 21.Qe2 Ba8+=)) 1–0. GuestKXKG – GuestGPPP. freechess.org, 2020.

7.Bd3 0–0 8.Nbd2 d6 9.0–0 Nbd7 10.e4 Re8 11.Bc4 (11.Qe2 e5 12.de5 Ng4+=) 11...e5 (11...Ne4 12.Bf7 Kf7 13.Ne4 Be4 14.Ng5 Kg8 15.Ne4=) 12.Ng5 (12.d5 a4=) 12...Rf8 (12...d5 13.ed5 Nd5 14.Nf7 Kf7 15.Qf3 Ke6 16.Qh3 Ke7 17.Qh7 Kf8 18.de5 Be5 (18...Ne5?? 19.f4 Nf3 20.Nf3+–) 19.Ba3 Nc5=) 13.Re1 ed4 14.Bd4 Ne5 15.Bf1 Nfd7 16.f4 f6?? (better 16...Nc5+=) 17.Ne6+– (17.Ne6 Qe7 18.Nf8 (18.fe5?! Qe6 19.Bc4 d5 20.ed5 Qf5+–) 18...Rf8 19.fe5 fe5 20.Bc4 Kh8 21.Bf2+–; 17.fe5 fg5 18.Bc4 Kh8=+) 1–0. DEFFM – GuestDYLL, freechess.org, 2020.

3.Bb2 c5

4.a4 d5 5.Nf3 Nf6 6.e3 e6 7.c4 (7.g3 Nbd7=) 7...Bd6 8.Be2 0–0 9.0–0 Nbd7 10.d4 Bb7 11.Nbd2 (11.Nc3 cd4 12.Qd4 Nc5=+) 11...cd4 (11...Re8 12.Ne5=) 12.Bd4 (12.Nd4 Qc7 13.f4 Nc5=) 12...Nc5 (12...Rc8 13.cd5 Bd5 14.Rc1=+) 13.Ne5 Qc7 14.f4 Nfe4 15.Rb1 Nd2 16.Qd2 Ne4 (16...Na4 17.Nc6=) 17.Qc2= Rac8 18.Nc6 Bc6 (18...Bc5 19.Bc5 Nc5 20.cd5 ed5 21.Bg4=) 19.bc6+= Qc6 20.Rb6 Qd7 21.Rb5 (21.Rfb1 Bc5 22.Rb7 Qd8 23.Bc5 Rc5=+) 21...Bb4 22.Rb1 (22.Bd3 f5=) 22...Nd6 23.R5b4 (23.c5 Nb5 24.ab5 Rc5 25.Bc5 Rc8 26.Rb4 ab4=+) 23...ab4= 24.c5 Nf5 25.Rb4 Nd4 26.ed4 Rb8 27.Rb5 Qe7 28.Qd2 Qf6 (28...f6!?=) 29.Rb6+= Qf5 30.a5 Rb6 31.cb6 Qb1 32.Kf2 f6? (better 32...Rc8!?+–) 33.Qc3+– e5? (better 33...g5+–) 34.de5 fe5 (34...Qf5 35.Qb4 Qc8 36.b7+–) 35.Qe5 Qb4 (35...Kh8 36.g3 Rd8 37.Qe7+–) 36.Qd5 Kh8 37.g3 Re8 (37...Rb8 38.Kf3 Qb1 39.Bc4+–) 38.b7 Qb2 (38...h6 39.Kf3 Qe7+–) 39.Qb5 Qd4 40.Kg2 Qe4 (40...Rb8 41.a6 h6+–) 41.Bf3 Qc2 42.Kh3 (42.Kh3 Rb8 43.Qe5 Rg8 44.b8Q Qa4 45.Qb7 Qc4 46.a6 h6 47.Qb6 Kh7 48.Be4 Qe4 49.Qe4 g6 50.Qe5 Rg7 51.Qbd4 Rg8 52.Qe7 Rg7 53.Qeg7) 1–0. Pierre – Schwadronner, internet, 2019.

4.c4 (--> 2.b5 c5 3.c4 b6 4.Bb2).

4.e3 Bb7 (--> 3.e3 Bb7 4.Bb2 c5).

4.e3 d5 5.a4 Bb7 6.Nf3 Nd7 7.c4 dc4 8.Bc4 e6 9.Na3 Ngf6 10.0–0 Be7 11.d3 0–0 12.e4 Qc7 13.Bb3 Rad8 14.Nc4 White plans e5 14...h6 (14...Ne8 15.Qe2=) 15.Nfd2 (15.Rc1 Rfe8=) 15...Nh7 16.f4 Rfe8 17.Qg4 Do you see the mate threat? 17...Bf6? (better 17...Nhf6!? 18.Qg3 Rf8+=) 18.e5+– Be7 (18...h5 19.Qh5 Be7 20.Ne4+–) 19.Nd6! Ndf8 (19...Bd6 20.ed6 A double attack) 20.f5 Kh8?? (20...Bg5 21.fe6 fe6 22.Ne8 Re8+–) 21.Nf7 Kg8 22.Nh6 Kh8 23.Nf7 Kg8 24.f6 g6 25.Nd8 Bd8 26.f7 Qf7 27.Rf7 (27.Rf7 Kf7 28.Nc4+–) 1–0. Pereira – Trainee, internet, 2020.

3.Bb2 c6

4.a4 cb5 5.ab5 (--> 1.b4 a5 2.b5 c6 TESTA340 3.a4 cb5 4.ab5 b6 5.Bb2).

5.a4 cb5 6.ab5 d6 7.Nf3 Nd7 8.d4 Ngf6 9.Be2 e6 10.0–0 Be7 11.c4 0–0 12.Nbd2 Ne4 13.Ne4 Be4 14.Nd2 Bg6 15.Bf3 Ra7 16.Qb3 Bf6 17.Bc6 Rc7 18.Ne4 Be4 19.Be4 Re8 20.Qd3 h6 21.Bh7 (better 21.g3!?+–) 21...Kh8+= 22.Be4 Kg8 23.f4 Be7 (23...Qc8 24.Ra4 Be7+–) 24.Bh7 (better 24.Bc6!?+–) 24...Kh8 25.Be4 Nf6 (25...Kg8 26.Bc6 Rf8+–) 26.Bc6+– Rf8 27.e4 White prepares d5 27...Qc8 (27...d5!? 28.ed5 ed5+–) 28.e5 de5 29.fe5 Ng8? (better 29...Nd7+–) 30.d5 Bc5 31.Kh1 (31.Bd4!? Bd4 32.Qd4 Qb8+–) 31...ed5 (31...Ne7 32.Bd4 Bd4 33.Qd4+–) 32.cd5 Ne7 33.Qe4 Nc6 34.bc6 (34.dc6?! Re7+–) 34...Re8 35.Qf4 Rf8 (35...Rd8 36.Rad1 b5+–) 36.e6?? (36.Rf3 Qd8+–) 36...f6? (36...fe6 37.Qh6 Kg8 38.Rf8 Bf8+–) 37.Ba3 (37.Qe4 Re7+–) 37...Re8? (37...Ba3 38.Ra3 Rd8+–) 38.Bc5 (38.Bc5 bc5 39.Ra5 Rc6 40.dc6 Qc6 41.Qf5 Qe6 42.Ra8+–) 1–0. DEFFM – GuestXZFK, freechess.org, 2019.

5.a4 cb5 6.ab5 Nf6 7.Nf3 e6 8.d4 Bb4 9.c3 Be7 10.Bd3 0–0 11.0–0 Nd5 (11...d5 12.Nbd2+=) 12.Nbd2 Nc7 (12...f5 13.g3+–) 13.Qc2 h6 14.c4 Ne8 (better 14...d6!?+–) 15.c5+– bc5 (15...Nf6 16.Ba3+–) 16.dc5 Bf6 17.Nd4 Bd4 (17...Nc7 18.Nc4 Bd4 19.ed4 (19.Bd4?! Nb5 20.Bg7 Kg7 21.Qb2 Qf6 22.Qb5 Ba6+=) 19...Nb5 20.Nb6+–) 18.Bd4 (worse 18.ed4 Nc7+–) 18...Nf6 (18...Qg5 19.e4+–) 19.Nc4 Bd5 (19...a4 20.Nb6 Ra5 21.Qc3+–) 20.Nb6 Ra7 21.Nd5 (21.e4!? Bc6+–) 21...Nd5 22.Bh7 Kh8 23.Be4 Nb4 (23...Kg8 24.Ra4+–) 24.Qb2 Nd5 (24...Rg8+–) 25.Bg7 Kg8 26.Bh6 f5 (26...f6+–) 27.Qg7 1–0. DEFFM – GuestWHSP, freechess.org, 2019.

4.a4 c5 5.c4 d5 6.e3 dc4? 7.Bc4 (7.Qf3 Ra7 8.Qg3 c3 9.Bc3 e5 10.Be5 Nd7 11.Bg7 Bg7 12.Qg7 Qf6 13.Qf6 Ngf6+–) 7...Be6? (better 7...Nf6+=) 8.Be6+– fe6 9.Qh5 g6?? (better 9...Kd7+–) 10.Qf3 Nf6 11.Qa8 Qd3 (11...Bg7+–) 12.Qb8 Kf7 (12...Qd8 13.Qd8 Kd8 14.d4+–) 13.Qb6 Qb3 14.Bc3 Ne4 15.Bh8 Qb2 16.Bb2 (16.Bb2 Bg7 17.Bg7+–) 1–0. DEFFM – AboHana, freechess.org, 2018.

4.a4 c5 5.e3 Bb7 6.Nf3 Ra7 7.c4 Qc7 8.Be2 d6 9.0–0 Nd7 10.d4 Kd8? (10...cd4!? 11.ed4 e6+=) 11.Nc3 (11.Ng5 Ke8+–) 11...cd4+– 12.ed4 e6 13.Rc1 Be7 14.d5 e5 15.Ne4 h6 16.Nfd2 f5 17.Ng3 Bg5? (better 17...g6!?+=) 18.Nf5+– Bd2 19.Qd2 g6 (19...Nc5 20.Qd1 Bc8 21.Ng3+–) 20.Nh4 (20.Ng7 Nc5 21.Ne6 Ne6 22.de6 Ke7+–) 20...Ne7 (20...g5 21.Ng6 Rh7 22.Bg4+–) 21.f4 Nc5 (21...Qc5 22.Kh1 Re8 23.fe5 de5 24.Bd3+–) 22.fe5 de5 (22...Nb3 23.ed6 Qc5 (23...Nd2?? 24.dc7 Kc7 25.Rfd1+–) 24.Bd4 Nd4 (24...Nd2 25.Bc5 Nc8 26.Bd4+–) 25.de7 Ke7+–) 23.d6 Bg2 1–0. GuestFTPC – iamalamp, freechess.org, 2017.

4.a4 c5 5.e3 d5 6.c4 e6 7.Nf3 (7.d4 Nf6=) 7...Nd7 (7...Nf6 8.Be2=) 8.cd5 (8.d4 Bb7=) 8...ed5 9.Be2 (9.Nc3 Ngf6=) 9...Bd6?? (better 9...Ngf6=) 10.Bg7+– 1–0. DEFFM – GuestMCCY, freechess.org, 2018.

4.a4 h5 5.e3 (5.Nf3 cb5 6.ab5 d5+=) 5...f6 (5...Nf6 6.Nf3+=) 6.Be2 (6.Bd3 Qc7+–) 6...g6 7.Bd3 (7.d4 d5+–) 7...cb5?? (better 7...Rh6+–) 8.Bg6 1–0. DEFFM – GuestCDCD, freechess.org, 2018.

4.e3 cb5 5.Bb5 Ba6 6.Qe2 Bb5 7.Qb5 Qc7 8.Nf3 Qc2 9.0–0 Nf6?? (better 9...Qc7+=) 10.Rc1+– (10.Qb6?! Qc6 11.Qb3 a4+=) 10...Qc1 11.Bc1 Nc6 12.Qb6 Rd8 (12...Rb8 13.Qc7 Nd5 14.Qg3+–) 13.Nc3 e6 14.Ba3! Ba3 15.Nb5 Be7 16.Nc7 Kf8 17.Ne5?? (better 17.d4 Rb8 18.Qa6+–) 17...Rb8?? (17...Ne5 18.Qa5 d5 19.Qa7–/+) 18.Qa6?? (18.Nd7 Nd7 19.Qc6 Rd8+–) 18...g6?? (better 18...Ne5 19.Qa5 Nc6–/+) 19.Nc6 dc6 20.Rc1 (20.Qa5 Nd5+–) 20...Kg7 (20...Ba3 21.Rd1+–) 21.f3 (better 21.Qa7 Nd7 22.Ne6 fe6 23.Qd7+–) 21...Rb1?? (21...Ba3 22.Rc6 Rb1 23.Kf2 Rb2 24.Qa5 Be7+–) 22.Ne6! fe6 23.Rb1 Rd8 24.Rb7 Rd2 (24...Kf7 25.Qa5 Rd3 26.Qc5+–) 25.Qa7 (25.Re7 Kh6 26.Qc8 Rd1 27.Kf2 Rd2 28.Kg3 Rd3 29.h4 c5 30.Qf8 Kh5 31.Kh3 Rd4 32.Rh7 Nh7 33.g4 Rg4 34.fg4) 25...Kh6 (25...Ng8 26.Re7 Ne7 27.Qe7 Kg8 28.Qe6 Kg7 29.Qc6 Rd1 30.Kf2 Rd2 31.Kg3+–) 26.Re7 Nd5 (26...Rd1 27.Kf2 Rd2 28.Kg3 Rd5+–) 27.Rh7 Kg5 28.g4 (28.Qb8 Nc7 29.Qc7 Rd1 30.Kf2 Rd2 31.Ke1 Rd1 32.Kd1 c5 33.Qe5) 28...Ne3 (28...Nc7 29.Qc7 Rd1 30.Kf2 Rd2 31.Ke1 Rd1 32.Kd1 e5 33.Qe5) 29.h4 (29.h4 Kf4 30.Qb8 Kf3 31.Rf7 Nf5 32.gf5 gf5 33.Qb3 Kf4 34.Qe6 Rd1 35.Kf2 Rd2 36.Ke1 Rd5 37.Re7 Kg4 38.Qe2 Kh4 39.Rg7 Re5 40.Qe5 f4 41.Qf4 Kh5 42.Qg5; 29.Qe3 Kf6 30.Qf4) 1–0. Agiant – akuma1, lichess.org, 2019.

4.e3 e6 5.Nf3 f6 6.Nh4 cb5? (better is 6...Nh6+=) 7.Qh5+– g6 (7...Ke7 8.Ng6! hg6 9.Qh8+–) 8.Ng6! hg6 9.Qh8 Nh6 (9...Kf7 10.Bb5 Bg7 11.Qh4+–) 10.Bf6 (10...Nf7 11.Qf8 Kf8 12.Bd8 Nd8 13.Bb5+–; 10.Bd3!? Kf7+–) 1–0. Wall,Bill – Sask, Internet, 2003.

4.e4 cb5 5.Bb5 Nc6 6.d4 Ba6 (6...Nf6 7.Nd2+=) 7.Nc3 (7.Ba6 Ra6 8.Nf3 e6+/–) 7...Qc7 (7...e6 8.d5 Nb4 9.a3+/–) 8.Nd5 0–0–0?? (better is 8...Qd8 9.Ba6 Ra6+=) 9.Ba6+– Kb8 10.Nc7 Kc7 11.d5 Ne5 12.Be5 d6 13.Qd3 de5 14.Qc3 Kb8 15.Qc6 Rd6 (15...Rd7 16.Qd7 Nf6 17.Qb7) 16.Qb7 1–0. moonlightconcert (2800) – idontknow, net–chess.com, 2006.

4.e4 e6 5.Nf3 d5 6.ed5 cd5 7.d4 Nf6 8.Bd3 Bb7 9.0–0 Nbd7 10.c4 (10.Re1!?=) 10...dc4+= 11.Bc4 Bd6 12.Nbd2 0–0 13.Qe2 Rc8 14.a4 Nd5 15.Ne4?? (better is 15.Ba3 Ba3 16.Ra3+=) 15...Nf4–+ 16.Qe3 (16.Nd6 Ne2 17.Be2–+) 16...Be4 (16...Be4 17.Rac1 Nf6–+; 16...Rc4?! 17.Nd6 Nd5 18.Nb7 Ne3 19.Nd8 Nf1 20.Nc6+=) 0–1. craig4000 – PeterRs, ChessWorld.net, 2015.

4.e4 Nf6 5.Nc3 +=.

3.Bb2 Nc6

4.bc6 dc6 5.e4 Bd7 6.d4 Qb8 (6...Nf6 7.Bd3+–) 7.Nf3 Qb7 8.c4 0–0–0 (8...Rd8 9.Bd3+–) 9.Bd3 b5 (9...Bg4 10.h3 Bh5 11.Nc3+–) 10.Nbd2 e6 11.Rb1 Bb4 12.0–0 Nf6 13.Nb3 (13.Qe2 Nh5+–) 13...bc4 (13...a4 14.Nbd2+–) 14.Bc4 Ne4 (14...c5 15.Nc5 Bc5 16.dc5+–) 15.Qd3 Nd6 (15...Kb8 16.Qe4 c5+–) 16.Ba6 Qa6 (16...c5 17.Bb7 Nb7 18.Qa6+–) 17.Qa6 Kb8 18.Na5 Nc4 19.Qb7 1–0. moonlightconcert (2800) – idontknow, net–chess.com, 2006.

4.bc6 dc6 5.e4 Bd7 6.d4 Qc8 (6...e6 7.Bd3+–) 7.Nf3 Qa6 (7...Nf6 8.e5 Nd5+–) 8.Ba6 Ra6 9.Qd3 Ra8 10.0–0 Be6 (10...e6 11.Ne5 Rd8 12.Ba3+–) 11.Ne5 Kd8 (11...Nf6 12.Nc6 Bd7 13.Ne5+–) 12.Nc6 (better is 12.d5 cd5 13.ed5 Kc8 14.de6 fe6+–) 12...Kc8 13.d5 Bd5 14.ed5 e6 15.de6 Bc5 16.ef7 (better is 16.Bg7 fe6 17.Bh8 Nh6+–) 16...Kb7 17.Qd5 Ra6 18.Ne7 Kb8 19.f8Q Ka7 20.Qfa8 1–0. moonlightconcert (2800) – idontknow, net–chess.com, 2006.

3.Bb2 d6

4.a4 Nd7 5.d4 Bb7 6.e3 d5 (6...e5 7.Nf3=) 7.Nf3+= e6 8.c4 (8.Bd3 Qf6+=) 8...c6 (8...Ngf6 9.Ba3=) 9.cd5+= cd5 10.Bd3 Bb4 11.Bc3 Bc3 (11...Be7 12.Bd2=) 12.Nc3 Ne7 (12...Rc8 13.Rc1+=) 13.0–0 Rc8 14.Ne2 f5 (14...0–0!?+=) 15.Ng5 Nf8 16.Nf4 Qd7 17.Qh5 Neg6?? (17...g6 18.Qh4+–) 18.Ng6 (better 18.Nfe6 Ne6 19.Bf5+–) 18...Ng6 19.Nf3 (better 19.Rac1!? Kd8 20.Ne6 Qe6 21.Bf5+–) 19...Qf7+– 20.Ng5 Qe7?? (20...Qd7 21.Rac1 (21.Nh7 Kf7–/+) 21...Ke7 22.Rc8 Qc8 23.Nh7+–) 21.Nf3 (better 21.g4!? Rc3 22.Bf5 ef5 23.gf5+–) 21...Qf7+– 22.Ng5 Qe7 23.Nf3?? (23.g4!? Rc3 24.Bf5 ef5 25.gf5+–) 23...Kd7 (23...Qf7!?=) 24.Rfc1 (24.Rfd1 Kd8+–) 24...Qf6 (better 24...Rc1!? 25.Rc1 Qa3+=) 25.Rc8+– Bc8 26.Rc1 Bb7 27.Qh3 h6?? (better 27...Qe7 28.Qg3 Rc8 29.Rc8 Kc8+–) 28.Qg3+– Rc8 29.Rc8 Kc8 30.Qd6 f4 31.Qb6 fe3 32.fe3 (32.Qa5?! ef2 33.Kf1 Nf4+–) 32...e5 (32...Kb8+–) 33.Bg6 (better 33.Qf6 gf6 34.Bg6+–) 33...Qg6 (better 33...Qb6 34.Ne5 Qd6–+) 34.Qg6 (34.Qg6 Kd7 35.Ne5 Kc7 36.b6 Kb8 37.Qd6 Ka8 38.Qf8 Bc8 39.Qc8) 1–0. Dino_Jarach (1765) – kalpakoglu11 (1795), lichess.org, 2018.

4.a4 e5 5.e3 Bb7 6.Nf3 Nf6 (6...Nd7 7.d4=) 7.c4 (7.Bc4 Nbd7=) 7...Be7 8.d4 e4 9.Nfd2 0–0 (9...d5 10.Nc3=) 10.Nc3 (10.d5 Re8+=) 10...d5= 11.cd5 Bd5 (11...Bb4 12.Rc1+=) 12.Be2 (12.Nd5 Qd5 13.Bc4 Qg5+=) 12...Bb7 (12...Bb4 13.Rc1+=) 13.0–0 (13.Qc2 c5 14.bc6 Nc6=) 13...c5 14.bc6 Nc6 (14...Bc6 15.Qb1 Combination; 14...Nc6 15.Nce4 Decoy (15.Nce4 Interception)) 15.f3 (15.Nce4!? Ne4 16.Ne4 Nd4 17.Qd4 Qd4 18.Bd4 Be4 19.Bb6+–) 15...ef3+= 16.Bf3 Rb8 (16...Rc8 17.Nde4+=) 17.Nb5 Nb4 (17...Bb4 18.Nc4 Ne7 19.Ba3+=) 18.Bb7+– Rb7 19.e4 Qd7 (19...Rd7 20.Rb1+=) 20.Qf3 Rd8? (better 20...Ne8!?+–) 21.e5+– Nc2? (better 21...Nfd5 22.Qf7 Kh8+–) 22.Rac1 (22.ef6?! Bf6 23.Rad1 Bd4 24.Kh1 Bb2+–) 22...Nd4 (22...Nd5 23.Rc2 Qe6+–) 23.Bd4 Bc5 (23...Qd5 24.ef6 Qf3 25.Rf3 Bf6 26.Bf6 gf6 27.Nc4+–) 24.Bc5 bc5 (24...Qd5 25.ef6 Qf3 26.Rf3 bc5 27.Nb3+–) 25.ef6 Qd2 (25...g6 26.Nb3 Rb6 27.Rc5+–) 26.Qb7 Qe3 (26...gf6 27.Qe7 Rd7 28.Qc5+–) 27.Kh1 gf6 (27...g6 28.Qe7 Qd2 29.Rc5+–) 28.Nd6! (28.Nd6 Qe6 29.Nf5+–) 1–0. Marcus – 5958, internet, 2018.

4.Nf3 Nf6 5.Nc3 +=.

4.Nf3 h6 5.e4+= e5 (5...Bb7 6.d3+=) 6.d4+/– d5 7.Ne5 de4 (7...Nf6!? 8.ed5 Qd5+/–) 8.Bc4+– Be6? (8...Qh4+–) 9.Be6 fe6 (9...Bb4 10.c3 Bc3 11.Nc3 Qg5 12.Bf7 Kf8 13.Ba3 Ne7+–) 10.Qh5 Ke7 11.Ba3 (11...Qd6 12.Qf7 Kd8 13.Bd6 Bd6 14.Qg7 Be5 15.de5+–) 1–0. Wall,Bill – SmartAttack, Internet, 1996.

3.Bb2 e6

4.a3 Ne7 5.e3 Ng6 6.Be2 Bb7 7.Bf3 (7.Nf3 f6+=) 7...d5 8.c4 Nh4 9.cd5 Bd5 10.Nc3 Bf3 11.gf3 (11.Nf3 Ng2 12.Ke2 Nh4+=) 11...Nd7 (11...Qg5 12.Nge2 Qg2 13.Ng3–/+) 12.Nge2? (better is 12.Ne4!?=) 12...Nf3 13.Kf1 Nc5 14.Nd4? (better is 14.d4 Nb3! 15.Nc1 Nbd2 16.Ke2–/+) 14...Nd4–+ 15.ed4 Qd4 16.Rc1 (16.Qf3 Rd8–+) 16...Nd3 17.Qf3 Rd8 (17...Nb2?! 18.Qa8 Qd8 19.Qd8 Kd8 20.Ke2+=) 18.Rc2 Nb2 19.Qc6 Qd7 20.Rb2 Ba3 21.Ra2 Bb4 22.Ne4 (22.Qc4 Qd6–+) 22...0–0 (22...Qc6 23.bc6 Rd4 24.f3–+) 23.Rg1 (23.Qd7 Rd7 24.Ke2 Rd5–+) 23...Qd3 24.Kg2 Rd5 25.Ng3 (25.Qc2 Qb5 26.Kh1 Rd3–+) 25...Rc5 (25...Bd2?! 26.Rd1 Qb5 27.Qb5 Rb5 28.Rad2–+) 26.Qb7 Qb5 27.Kh3 (27.Qf3 Rd5–+) 27...Qc4 28.Raa1 Bd2 29.Rad1 Rd5 30.f3 h6 31.Ne4 Qd4 (31...Rh5 32.Kg4 g6 33.h4 f5 34.Kh3 fe4 35.Qe4 Rf3 36.Qf3 Qh4 37.Kg2 Qh2 38.Kf1–+) 32.Rg2 (32.Qc7 Rfd8 33.Qg3–+) 32...Rh5 (32...Qe3 33.Rg3 Rh5 34.Kg2 Qe2 35.Nf2–+) 33.Kg4 f5 (better is 33...Qe5 34.Nf6 gf6 35.h4–+) 34.Kh5 fe4 35.fe4 (35.Qe4 Rf5 36.Qf5 ef5 37.Rdd2–+) 35...Qe5 36.Kh4 Rf4 37.Rg4 Qg5 38.Kh3 Qg4 0–1. mikebaldini (1705) – shrekee (1660), gameknot.com, 2014.

4.c4 f5 5.Nf3 Nf6 6.e3 Be7 7.Be2 Bb7 8.0–0 0–0 9.Nd4 Bd6 10.f4 g5 11.Bf3 Bf3 12.Qf3 c6 13.fg5 Ng4 14.h3 Nh2 15.Qh5 Nf1 16.Kf1 Qe8 17.Qf3 Be5 18.Ke2 (18.Bc3 f4 19.Kg1 fe3–/+) 18...Bd4 (better is 18...d5!?–+) 19.Bd4=+ e5 20.Bb6 Qe6 21.Na3 e4 22.Qf4 cb5 23.Bd4 (better is 23.c5!?–/+) 23...b4–+ 24.Nc2 Qc4 25.Kf2 Nc6 (25...Qc2?! 26.Qe5 Kf7 27.Qd5 Kg6 28.Qd6 Kf7 29.Qd5 Kg6 30.Qd6 Kf7 31.Qd5=) 26.Bf6?? (26.g6 hg6 27.Qh6–+) 26...Qc2 27.Qd6 Qd3 28.Qd3 ed3 29.Rc1 Rf6 30.gf6 a4 (31.g4 fg4 32.hg4 Kf7–+) 0–1. Mielke,Sven – Ossenbrueggen,Lars (2055), Wichern op 4th, 1997.

4.e3 Nf6 5.f4 a4 6.Bd3 c5 7.Nf3 Bb7 8.0–0 Be7 9.c4 d5 10.Nc3 0–0 11.Na4 Nbd7 12.Qc2 h6 13.Ne5 Ne5 14.fe5 Nd7 (14...Ne4 15.Nc3+=) 15.cd5+– ed5 (15...Bd5 16.Nc3 Bb7 (16...Ne5?? 17.Bh7 Kh8 18.Nd5 ed5 19.Be5+–) 17.Bh7 Kh8+–) 16.Bf5+– d4 (16...Ra5 17.e6 Nf6 18.ef7 Kf7+–) 17.ed4 (17.e6 Ne5 18.ef7 Kh8 19.ed4 cd4 20.Rae1+–) 17...cd4+– 18.Bd7 Qd7 19.Nb6 Rac8?? (19...Qb5 20.Na8 d3+=) 20.Qc8+– Qg4 (20...Bc8 21.Nd7 Bd7+–) 21.Qg4 1–0. Pereira – Batto, internet, 2020.

4.e4 Nf6 5.Nc3 Bb7 =.

4.e4 Nf6 5.e5 Nd5 6.c4 Nb4? (better is 6...Ne7+=) 7.a3+– Bc5 (7...N4c6 8.bc6 Nc6 9.Nf3+–) 8.ab4 Bb4 9.Bd3 c6 (9...Bb7 10.Qg4 Bf8 11.Be4+–) 10.Qg4 c5 (10...g6+–) 11.Qg7 Rf8 12.Nf3 (better is 12.Be4 Ra7 13.Nf3 h6+–) 12...h5 13.Ng5 Qe7 14.Nh7 h4 15.Nf8 Qf8 16.Qf8 Kf8 17.h3 Bb7 18.0–0 d5 19.ed6 Nd7 20.f4 a4 21.f5 e5 22.Bc2 f6 23.Ra4 Kf7 24.Ra8 Ba8 25.Re1 e4 26.Be4 Be4 27.Re4 Ne5 28.Be5 fe5 29.Re5 Kf6 30.Re8 Kf5 31.d7 Kf4 32.d8Q Kg3 33.Qg5# 1–0. Fabbri (1765) – jordan2delta, internet, 2006.

4.e4 Nf6 5.e5 Ne4 6.d3 Nc5 7.d4 +=.

4.Nf3 Bb7 5.e3 (--> 3.e3 Bb7 4.Bb2 e6 5.Nf3).

3.Bb2 f6

4.a4 c6 5.c4 (5.e4 Bb7+=) 5...cb5 6.cb5 d5 7.e3 Qd6 (7...e5 8.d4 Bb4 9.Nd2=) 8.Nf3 Qb4 (8...e5 9.Ba3 Qd8 10.Ne5 Ba3 11.Qh5 Ke7 12.Ng6 hg6 13.Qh8+–) 9.Bc3 Qe4 10.d3 Qf5 11.Be2 Nh6 12.0–0 Qh5 (12...e5 13.e4 Qd7 14.Bd2+=) 13.Qb3 (13.Bd4 Nd7+–) 13...Bg4 (13...Nd7 14.Bd4+/–) 14.Nbd2 (14.h3 Bd7+–) 14...Nd7 (better is 14...Qf7!?+/–) 15.h3+– Bf3 (15...Be6 16.Nd4 Qf7 17.Ne6 Qe6 18.Bh5 g6 19.Bf3+/–) 16.Bf3 (16.Nf3?! e6+/–; worse is 16.gf3 Nc5 (worse is 16...Qh3 17.Qd5 Rc8 18.Rfc1=) 17.Qa2 Rc8+=) 16...Qf5 17.Qd5 Qd5 18.Bd5 +–. Trkn – Baron_Samedi, itsyourturn.com, 2000.

4.Nc3 d5 5.e4 (5.Nf3 a4 (5...d4 6.Na4 e5 7.e3 c5 8.Bc4 Bd6 9.0–0+=) 6.e4 d4 7.Nb1 e5 8.Bc4 a3 9.Bc1=; 5.d4 e6 (5...Bf5 6.f3 e6 7.e4 Bg6 8.Bd3 de4 9.Ne4+=) 6.e4 de4 7.Ne4 Bb7 8.Qh5 g6 9.Qe2+=; 5.e3 e6 (5...e5 6.d4 ed4 7.Qd4 Ne7 8.0–0–0 Be6 9.Be2+=) 6.Nf3 Bd6 7.d4 Ne7 8.e4 0–0 9.Bd3+=) 5...d4 6.Nd5 a4 7.Bc4 a3 8.Bc1 Ra4 9.Bb3 +=.

4.Nc3 e6 5.e4 (5.Nf3 a4 (5...Bb7 6.e4 a4 7.a3 Bd6 8.Qe2 Nh6 9.Qc4+=) 6.a3 d5 7.e3 Bd6 8.Qe2 Ne7 9.e4=; 5.a3 Ne7 (5...d5 6.e3 e5 7.d4 ed4 8.Qd4 Be6 9.Rd1+=) 6.e4 d5 7.d4 f5 8.e5 Ng6 9.Nf3+=; 5.e3 d5 (5...Bb7 6.Nf3 a4 7.a3 Nh6 8.Bc4 Be7 9.0–0+=) 6.Bd3 Nh6 7.Nge2 e5 8.e4 d4 9.Nd5+=) 5...d6 (5...Bb7 6.Bc4 a4 7.a3 Nh6 8.d4 Nf7 9.Qe2+=; 5...a4 6.a3 Bb7 7.Nf3 Be7 8.d4 Nh6 9.Bc1+=) 6.Nh3 (6.Bc4 c6 7.bc6 Nc6 8.Bb5 Bd7 9.Nf3+/–) 6...Ne7 (6...a4 7.Bc4 Qe7 8.Nf4 a3 9.Bc1+/–) 7.Bc4 (7.Qh5 g6 8.Qf3 Nd7 9.e5+/–) 7...Nd7 (7...c6!?+/– 8.bc6 Nbc6 9.Nf4+/–) 8.Nf4 (8.Be6 Ne5 9.Nf4+– 1.88) 8...Nc5 9.d4 d5 (9...e5 10.dc5 ef4 11.Nd5+–) 10.ed5 (10.dc5?! dc4 11.Qh5 g6+–) 10...ed5 11.Ncd5 (11.dc5?! dc4 12.Qd8 Kd8 13.0–0–0 Ke8+–) 11...Nd5 12.Bd5 Bb7 (12...Nb7 13.Qf3 Rb8 14.Bc6 Bd7 15.0–0–0+– (worse is 15.Bb7 Qe7 16.Kd1 Qb4+–)) 13.dc5 Bd5 14.Nd5 Be7 (14...Bc5 15.Qe2 Kf7 16.0–0–0+–) 15.Qh5 g6 16.Qf3 Rf8 (16...0–0 17.0–0–0 bc5+–) 17.0–0–0 Bc5 18.Nf6 1–0. marekt – 2buddies, ChessWorld.net, 2016.

4.e3 e5 5.c4 d6 (5...Bb7 6.Nc3=) 6.a4 Ne7 (6...Ra7 7.d4=) 7.Nf3 g6 8.Be2 Bg7 9.0–0 0–0 10.d4 f5 (better 10...c5!?+=) 11.de5+– de5 White creates threats along the open d–file 12.Qd8 (12.Be5 c5+–) 12...Rd8+– 13.Be5 Be5 14.Ne5 Nd7? (14...Bb7 15.Rd1 Rd1 16.Bd1+–) 15.Nd7?? (better 15.Rd1+–) 15...Rd7 16.Nc3 (16.Bf3 Rb8+–) 16...Bb7+– 17.Rfd1 Rad8 18.Rd7 Rd7 19.Rd1 Rd1 20.Bd1 Kf7 21.f4 (21.Bc2 Ke6+–) 21...Ke6+= 22.Kf2 Kd6 23.Ne2 (23.Nb1!?+=) 23...Kc5= 24.Bb3 (24.g4 Kc4 25.h3 c5=) 24...Kb4=+ 25.Nd4 c6 (better 25...c5 26.bc6 Nc6–/+) 26.g3? (better 26.Bd1 c5 27.Ne6=+) 26...c5–+ 27.Bd1 (27.Ba2 Kc3 (worse 27...cd4 28.ed4 Be4 29.d5–+) 28.Ne6 Kb2–+) 27...cd4 28.ed4 Kc4 29.Ke3 (29.h4 Kd4 30.Be2 Nd5–+) 29...Nd5 30.Kd2 Nc3 31.Bc2 Kb4 32.Kd3 Na4 33.Ba4 Ka4 (better 33...Be4!? 34.Kd2 Ka4 35.Kc3 Kb5 36.Kb3–+) 34.Kc4 Ka3 35.d5 Bd5! 36.Kd5 Kb4 37.Kc6 a4 38.Kb6 a3 39.Kc6 a2 40.b6 a1Q 41.b7 Qc3 42.Kb6 (42.Kd7 Qd4 43.Kc7 Qc5 44.Kd7 Qb6–+) 42...Qe3 (42...Qc5 43.Ka6 Qa5) 43.Ka6 Qe6 44.Ka7 Qe7 (44...Ka5 45.h3 Qe3 46.Ka8 Ka6 47.b8N Kb6 48.h4 Qe4 49.Nc6 Qc6 50.Kb8 Qe8) 45.Ka6 (45.Ka8 Qe4 46.Ka7 Qd4 47.Ka6 Qd6 48.Ka7 Ka5 49.h3 Qa6 50.Kb8 Kb6 51.Kc8 Qb7 52.Kd8 Qf7 53.h4 Kc6 54.g4 Qd7) 45...Qd6 (45...Qc7 46.Ka7 Kc5 47.Ka8 Qa5 48.Kb8 Kc6 49.h3 Qc7 50.Ka7 Qb7) 46.Ka7–+ White is in command 46...Qc7 (46...Ka5 47.h3 Qc7 48.g4 Kb5 49.Ka8 Qa5 50.Kb8 Kc6 51.gf5 Qc7 52.Ka7 Qb7) 47.Ka8 Qb7 (better 47...Qa5 48.Kb8 Kc5–+) 48.Kb7 Kc4 49.Kc7 Kd4 50.Kd6 Ke4 51.Ke6 Kf3 52.Kf6 Kg2 53.g4 (53.h4 Kg3 54.h5 Kf4 55.h6–+) 53...Kh2 (better 53...fg4 54.Kg5 g3 55.hg3 Kg3–+) 54.gf5= Kh3?? (better 54...Kg3=) 55.fg6+– hg6 56.Kg6 Kg4 57.f5 Kf4 58.f6 Kg4 59.f7 Kg3 (59...Kf4+–) 60.f8Q Kg4 (60...Kh2 61.Qf4 Kg1 62.Kf5 Kg2 63.Kg4 Kg1 64.Kg3 Kh1 65.Qc1) 61.Qf6 Kg3 62.Qf5 (62.Kf5 Kf2 63.Kf4 Kg2 64.Qb2 Kf1 65.Kf3 Ke1 66.Qe2) 62...Kg2 63.Qg5 (63.Qf4 Kg1 64.Kf5 Kh1 65.Qd2 Kg1 66.Ke4 Kf1 67.Kf3 Kg1 68.Qg2) 63...Kh2 (63...Kf2 64.Kf5 Kf3 65.Qf4 Kg2 66.Kg4 Kg1 67.Kg3 Kh1 68.Qc1) 64.Kf5 (64.Kf5 Kh3 65.Kf4 Kh2 66.Kf3 Kh3 67.Qg3) 1–0. BeepBeepImAJeep (2650) – Hondachess (1740), lichess.org, 2017.

4.e3 g6 5.c4 Bb7 6.d4 Bg7 7.d5 Nh6 8.Nf3 0–0 9.Be2 e5 10.e4 d6 11.0–0 Bc8 12.h3 Nd7 13.Qc2 Nc5 14.Nbd2 f5 15.Ng5?? (better 15.Rae1=) 15...Qg5–+ 16.f4 Qe7 (16...ef4 17.Nf3 Qe7 18.Bg7 Kg7 19.Qb2 Kg8 20.e5 de5 21.Rae1–+) 17.ef5 (17.fe5 Be5 18.Be5 Qe5–+) 17...Bf5 (17...Rf5?! 18.fe5 Rf1 19.Rf1 Be5 20.Be5 Qe5 21.Nf3–+; 17...gf5?! 18.Rae1–+; worse 17...Nf5 18.fe5 Be5 19.Rae1–+) 18.Qd1 e4 (18...ef4!? 19.Bg7 Kg7 20.Re1–+) 19.Bg7 Qg7 20.g4 (20.Nb3 Rae8–+) 20...e3 (20...Bd7 21.Nb3–+) 21.Nf3 Be4 22.Nd4 (22.Qd4 Rae8–+) 22...Na4! 23.Ne6 (23.Qa4 Qd4 Deflection) 23...Qh8?? (better 23...Qb2!? 24.Bf3 Nc3 25.Qd4–+) 24.Qb3?? (better 24.Qa4 Qb2 25.Qd1+= (25.Nf8?? Qe2 26.Qc2 Qc2 27.Rf3 Bf3 28.Ng6 Qf2)) 24...Nc3–+ 25.Rae1 (25.Qb2 Rf7 26.Rac1 Na4 27.Qh8 Kh8–/+) 25...Rf7 (25...Ne2?! 26.Re2 Rae8 27.Qe3=) 26.Bf3 Bd3 (26...a4!? 27.Qb2 a3 28.Qa1 Bf3 29.Rf3 Ne2 30.Kh1–+) 27.Re3 Bf1 (27...a4 28.Qb2 a3–+ (28...Bf1?! 29.Kf1 Na2 30.Qa2=+)) 28.Rc3?? (better 28.Kf1 Na2! 29.Qa2–/+) 28...Bh3–+ 29.g5 Be6 (29...Nf5 30.Kh2 Nd4 31.Nd4 Qd4 32.Kh3 Rf4 33.Re3–+) 30.de6 Re7 (30...Qd4 31.Kg2 Rf4 32.gh6 Qd2 33.Kf1–+) 31.Bd5?? (31.Ba8 Qd4 32.Kh1–+) 31...Rf8 32.gh6 Qd4 33.Kg2 Qd2 34.Kh3 Qf4 35.Rf3 Qh6 36.Kg2 Qd2 37.Kg3 Qg5 38.Kh2 Qh4 39.Kg2 Qg5 40.Kh2 Qe5 41.Kg2 Qe2 42.Kh3 (42.Kg3 h5 43.Rf8 Kf8–+) 42...Rf3 43.Bf3 Qe6 (43...Qe6 44.Kg2 Qe5–+) 0–1. GuestKZQQ – FredlesB, freechess.org, 2017.

3.Bb2 Nf6

4.a4 g6 5.c4 Bg7 6.e3 0–0 7.Nf3 d6 8.Be2 e5 9.0–0 Nbd7 10.d4 e4 11.Nfd2 Bb7 12.Nc3 Re8 13.Qc2 e4 becomes the focus of attention 13...Qe7 14.Rac1 Rac8 15.Rfd1 h5 16.Nb3 White plans d5 16...Nf8 (16...h4 17.d5+=) 17.d5 (17.c5 dc5 18.dc5 Rcd8+–) 17...N8h7 18.Nd4 Ng5 19.Nc6 Bc6 20.dc6 h4 21.Rd5 (21.Nd5 Nd5 22.cd5 h3+=) 21...Ngh7 (better 21...Nd5!? 22.Nd5 Qe6=+) 22.Rd4 Ng5 23.Nd5 (23.Rd2 h3+=) 23...Nd5 24.Rd5 (worse 24.cd5 Bd4 25.Bd4 h3=+) 24...Bb2 25.Qb2 Ne6 26.Rcd1 Rcd8 27.Qc2 f5 28.f3 (28.Qa2 Qf6+=) 28...Nc5 29.f4 Qf7 30.R1d4 Re6 31.h3 Rde8 32.Bd1 (32.Kh2 g5 33.fg5 Qg6=+) 32...Rf6 (32...Nd3!?=+) 33.Qf2 Qg7 (33...Nd3 34.Qh4 Kg7 35.Qg3=) 34.Qh4 Kf7 (34...Nd3 35.Bc2 Nb4 36.Bb3 Nd5 37.c5=) 35.Qg5 (35.Bc2 Rh8 36.Qg3 Ne6+=) 35...Rh8 (35...Ne6 36.Qg3 Nd4 37.ed4=) 36.Rc5 (better 36.Rd2+=) 36...dc5?? (36...bc5 37.Rd2–/+) 37.Rd5 (37.Rd7 Kg8 38.Rg7 Kg7+–) 37...Kf8?? (better 37...Rd6 38.Rd6 cd6=) 38.Rd8+– Ke7 39.Rd7 Ke6 (39...Kf8+–) 40.Rg7 (40.Rg7 Rh7 41.Rg6 Rg6 42.Qg6 Ke7 43.Qh7 Kf6 44.Bh5 Ke6 45.Qd7 Kf6 46.Qf7) 1–0. BeepBeepImAJeep (2710) – Krestoman (2635), lichess.org, 2020.

4.c4 g6 5.Nf3 Bg7 6.g3 0–0 7.Bg2 Bb7 8.d3 (8.Nc3 d5+=) 8...d6 9.a4 Nbd7 10.0–0 e5 11.Nc3 h6 12.Ne5 (12.Ba3!?=) 12...Bg2=+ 13.Nd7 Bb7?? (better 13...Bf1 14.Nf6 Qf6 15.Qf1 Rae8=+) 14.Nf8+– Qf8 15.Qd2 Qe7 16.e4 Re8 (16...Nd7 17.Nd5 Bd5 18.cd5+–) 17.Nd5 Nd5 18.cd5 Be5 (18...f6 19.f4+–) 19.Be5 Qe5 (19...de5 20.Qh6 Rd8 21.f4 Qc5 22.Rf2 Rd5 23.f5+– (23.ed5?! Qd5 24.Re2 Qd4 25.Kf1 Qa1 26.Re1 Qa3 27.Re5 Qd3 28.Kf2 Qd2 29.Re2 Qd4 30.Kf1 Qd1 31.Kf2 Qd4 32.Ke1 Qc3 33.Kf1 Qf3 34.Ke1 Qc3 35.Kf2 Qd4=)) 20.Qh6 Qe7 (20...Rd8 21.Rac1 Rd7 22.Rc4+–) 21.Rac1 Rd8 (21...Bc8 22.Rc4 Bb7 23.Rfc1+–) 22.f4 Rd7 (22...Bc8 23.f5 c5 24.bc6+–) 23.f5 Qf8 (23...Qf6+–) 24.Qf8 Kf8 25.fg6 1–0. Dalia – Zardusi, internet, 2019.

4.d3 Bb7 5.Nf3 d5 6.e3 Nbd7 7.Be2 e5 (7...e6 8.0–0=) 8.Nbd2 (better 8.Ne5!? Ne5 9.Be5+–) 8...Bd6= 9.c3 (9.0–0 0–0=) 9...0–0 10.0–0 Re8 11.Qc2 c6 12.a4 Rc8 13.h3 cb5 14.ab5 Qe7 15.c4 e4 16.de4 dc4 (16...de4 17.Nd4=+) 17.Bc4 (better 17.Rfc1=) 17...Rc4?? (better 17...Ne4 18.Rfc1 Nd2 19.Qd2 Bf3 20.gf3 Ne5–/+) 18.Qc4+– Rc8 19.Bf6 Qf6 (19...Nf6!? 20.Qd4 Bc5+–) 20.Qd4+– Ne5 21.Rac1 (21.Rfd1 Rd8+–) 21...Rc1 (better 21...Rd8+–) 22.Rc1+– h6 (22...Nf3 23.Nf3 (23.gf3?! Qg5 24.Kh1 Qh6+–) 23...Qd4 24.ed4+–) 23.Ne5 Be5 (23...Qe5 24.Qe5 Be5+–) 24.Qd7 Bc3 (24...Qd6 25.Qb7 Qd2 26.Qc8 Kh7 27.Qf5 g6 28.Qf7 (28.Qe5?! Qc1 29.Kh2 Qc4+=) 28...Bg7 29.Rc7 Qd1 30.Kh2 Qd6 31.f4 Qc7 32.Qc7+–) 25.Qb7 (better 25.Nc4 Be1 26.Re1 Qc3+–) 25...Bd2 26.Rd1 (26.Rc6 Qa1 27.Kh2 Kh7+–) 26...Bb4 27.Qd5 (27.Qc6 Qe6+–) 27...a4 (27...Bc5 28.Qc6 Qe5 29.Rd5+–) 28.Qd8 (28.Qa8 Kh7 29.Qa4 Qe7+–) 28...Qd8 (28...Bf8+–) 29.Rd8 Kh7 30.Rd1 (better 30.Rd4 Be7 31.Ra4+–) 30...Bc5 31.Ra1 a3 32.Ra2 (32.Kf1 Kg6+–) 32...Kg6 33.Kf1 Kf6 34.Ke2 Ke6 35.f3 Kd6 36.Kd3 f6 37.g4 Bb4 38.f4 (better 38.Kc4 Bc5 39.h4+–) 38...Kc5+– 39.h4 (39.e5 fe5 40.fe5 Kb5+–) 39...Kb5+= 40.g5 1–0. e4_e5_f4 (1740) – jawurek (1730), lichess.org, 2020.

4.e3 Bb7 5.Nf3 (--> 3.Bb2 Bb7 4.e3 Nf6 5.Nf3).

4.e3 d5 5.Nf3 Nbd7 6.c4 Bb7 7.Nc3 e6 8.cd5 ed5 9.d4 Bb4 10.a3 Bc3 11.Bc3 0–0 12.a4 Re8 13.Bd3 Ne4 14.Bb2 Rc8 15.Rc1 Qe7 16.0–0 f5 17.Qb3 Ndf6 (17...Qb4 18.Bc2+=) 18.Ne5 (18.Ba3!? Qe6 19.Ne5+/–) 18...Nd2= 19.Qc2 Nf1 20.Kf1 (20.Bf5!? Ne3 21.fe3=) 20...g6+= 21.Nc6 Bc6 22.Qc6 Qd6 (22...Qe6!?–/+) 23.Qd6= cd6 24.Ke1 (24.Rc6 Rc6 25.bc6+=) 24...Rc1–/+ 25.Bc1 Kf7 26.f3 f4 27.Kf2 fe3 28.Be3 Rc8 29.Bd2 Ng8 30.g3 Ne7 31.g4 Kf6 32.h4 Ng8 33.Bg5 Kg7 34.Bd2 Nf6 35.Kg3 Ne8 36.f4 (36.Kf2 Kf7+=) 36...Nf6–/+ 37.Kf3 Kf7 38.Ke3? Ng4–+ (38...Ng4 39.Kf3 Nf6–+) 0–1. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

4.e3 e6 5.a4 Bb7 6.c4 d5 7.Nf3 Nbd7 8.Be2 Bd6 9.0–0 0–0 10.d4 Ne4 11.Ne5 f6 (11...Ne5!? 12.de5 Bb4=) 12.Nc6+= Qe8 13.cd5 ed5 14.Qb3 Qf7 15.Bf3 (15.Bd3 Qh5 16.h3 Qf7+=) 15...f5= 16.Rc1 Nb8 (16...f4=) 17.Nc3 (better 17.Nb8!? Rab8 18.Ba3+=) 17...Nc6–/+ (17...Bc6?! 18.bc6 Rd8 19.Be2= (worse 19.Nd5 Bb4–/+)) 18.bc6 Bc6 19.Ne4 (19.Rc2!?=+) 19...fe4–+ (19...de4?! A) 20.Rc6?? Qb3 (20...ef3?! 21.Qf7 Rf7 22.gf3=) 21.Ba3 Ba3–+; B) 20.Qf7 Rf7 21.Rc6 ef3 22.gf3=) 20.Be4? (better 20.Rc6 ef3 21.g3–+) 20...de4?? (better 20...Qf2 21.Kh1 Kh8–+) 21.Qf7=+ Rf7 22.Rc6 Raf8 23.Rc2 h6 (23...Rf5 24.Ba3 b5 25.ab5 Rb5 26.h4=) 24.Ba3 Ba3 25.Ra3 Rd7 26.Rac3 The backward pawn on c7 becomes a target (26.Rc6 Rf6 27.Rac3 Rc6 28.Rc6 Re7+=) 26...Rff7 (26...c5 27.Rc4=) 27.g3 Kf8 28.Rc6 Ke8 29.Kf1 Kd8 30.Re6 Rfe7 31.Rg6 Rf7 32.Ke2 Rf6 33.Rg4 g5 (better 33...Rdf7 34.Ke1 Re7=) 34.Re4+– Rdf7 35.Ke1 Rd6 36.h4 Rfd7 37.hg5 White fights for the Initiative 37...hg5 38.Re5 Rd5 39.Rd5 Rd5 40.Ke2 Kd7 41.Kd3 c6 42.e4 Rd6 43.f4 Rh6 44.e5 (44.fg5!? Rg6 45.Ke3 Rg5 46.Kf4+–) 44...Rh3+– 45.Ke4 Rg3 46.f5 The passed pawn on f5 quickly leads to threats 46...Ra3? (better 46...Rg4 47.Kd3 Rg3 48.Kc4 Ra3+=) 47.f6+– c5 (47...Ra1 48.Kf5 Re1 49.Rf2+– (worse 49.Kg5 Re3+–)) 48.Rf2 (48.f7 Ke7 49.Rf2+–) 48...Ra4 49.f7 (49.Kf5 Ke8 50.Rh2+–) 49...Rd4 Black is in command 50.Ke3 g4?? (better 50...Rf4 51.f8Q Rf8 52.Rf8 b5+–) 51.f8Q g3 52.Rf7 (52.e6 Kc6 53.e7 Kb5 54.Rb2 Kc6 55.e8Q Rd7 56.Qf6 Kd5 57.Qee6) 52...Kc6 53.Qe8 Kd5 54.Qd7 Kc4 55.Qe6 Kb5 (55...Kc3 56.Qb6 Rd3 57.Ke2 Rd2 58.Ke1+–) 56.Rf4 (56.Rb7 Kb4 57.Rb6 Kc3 58.Qb3) 56...g2+– 57.Rd4 (better 57.Qe8 Kb4 58.Qg6+–) 57...g1Q–+ 58.Ke2 The mate threat is Qc4 58...Qd4 (58...cd4 59.Qd5 Kb4 60.Qd6 Ka4 61.Qc6 b5 62.Qe4–/+) 59.Qe8 (59.Qb3 Ka6 60.e6 Qg4 61.Kf2 Qh4 62.Ke2 Qh2 63.Kf1 Qd6–+) 59...Kb4 60.e6 Qc4 61.Ke3 b5 (61...Qc3 62.Ke4 Qd4 63.Kf5–+) 62.Kf3 (62.Qd7 Qc3 63.Ke4 Qe1 64.Kd5 Qh1 65.Kd6 c4+–) 62...Qd4 (better 62...a4–+) 63.Qf8?? (63.Qd7 Qf6 64.Ke4 Qg6 65.Kd5=) 63...Qc3 (63...Qd5 64.Ke3 Qe6 65.Kd2–+) 64.Ke4?? (better 64.Kg4 Qc2 65.e7 Qg6 66.Kf4 Qd6 67.Kf5 Qd5 68.Kf6 Qf3 69.Ke6 Qe4 70.Kd7 Qd5 71.Kc7 Qe5 72.Kd7 Qd5 73.Kc7 Qe5 74.Kd7 Qd5=) 64...Qc4–+ 65.Kf5 (65.Ke3 Qe6 66.Kf2–+) 65...Qe6 (better 65...Qf1 66.Ke4 Qf8–+) 66.Ke6+– a4 67.Kd6 (better 67.Kd5 Kb3+–) 67...a3 68.Kc6 Ka4 69.Qc5 Kb3 70.Qc2 (better 70.Qb5 Kc3 71.Qa4+–) 70...Kc2–+ 71.Kb5 a2 72.Kb4 a1Q 73.Kc5 Qb2 74.Kc4 (74.Kd6 Qd4 75.Kc6 Kd3 76.Kc7 Kc4 77.Kb7 Kd5 78.Kc7 Qa7 79.Kd8 Kd6 80.Ke8 Qe7) 74...Qc3 (74...Qe5 75.Kb4 Kd3 76.Ka3 Qb5 77.Ka2 Kc3 78.Ka3 Qb3) 75.Kd5 Qd3 (75...Kd3 76.Ke6 Kd4 77.Kf5 Qc8 78.Kf6 Ke4 79.Kg6 Qh8 80.Kf7 Ke5 81.Kg6 Qg8 82.Kh5 Kf5 83.Kh4 Qg4) 76.Kc6 (76.Ke5–+) 76...Kc3 77.Kc5 Qd4 78.Kb5 (78.Kc6 Kc4 79.Kb7 Kd5 80.Kc7 Qa7 81.Kd8 Kd6 82.Ke8 Qe7) 78…Qd5 (78...Qd5 79.Kb6 Qd6 80.Ka5 Qb8 81.Ka6 Kc4 82.Ka5 Qb5; 78...Qd6 79.Ka5 Qb8 80.Ka6 Kc4 81.Ka5 Qb5) 0–1. BeepBeepImAJeep (2550) – ya_boy_Agent (2240), lichess.org, 2017.

4.e3 e6 5.c4 Be7 6.Nf3 0–0 7.a4 d5 8.Be2 Nbd7 9.0–0 Bb7 10.d4 Re8 11.Nbd2 Ne4 12.Rc1 f5 13.Ne4 fe4 14.Ne5 Ne5 15.de5 Rc8 16.Bd4 (16.cd5 ed5 17.Bh5 g6+–) 16...Ba3 17.Rb1 c5 (17...Qg5=) 18.Ba1?? (better 18.bc6 Bc6 19.Rb6+–) 18...Bb4 (18...Qg5 19.Bg4=+) 19.Qb3 Qc7 20.Rbd1 Red8 (20...Rcd8 21.Bh5 Rf8 22.cd5 ed5 23.e6=) 21.Bg4 Qe7 22.h3 Rc7 23.Qc2 Rcd7 24.cd5 Rd5 White gets strong play along the open d–file 25.Be2 (better 25.Bb2!?=) 25...Rd2–/+ 26.Qc4 Bd5 27.Rd2 Bc4 (27...Bd2?! 28.Qc2 Bb4 29.Rd1=) 28.Rd8 Qd8 29.Bc4 Qe7?? (better 29...Kf7–+) 30.Rd1+– g6 (30...Kh8!?+–) 31.Rd6+– Kg7 32.Be6 c4?? (better 32...Kh6 33.Rb6 Be1+–) 33.Rc6 (better 33.Rd7 Qd7 34.Bd7+–) 33...c3= 34.Kf1?? (better 34.Bb3=) 34...Qd8–+ 35.Bb3 (35.g3 Qd1 36.Kg2 Qa1 37.Rc7 Kf8–+) 35...Qd3 36.Kg1 Qb1 37.Kh2 Qa1 (better 37...Qb3 38.Kg3–+) 38.e6 (38.Rc7 Kh6 39.Bg8–+) 38...Qb2 39.Bd5 (39.Bd1 Qf2 40.Bb3 Qe3–+) 39...c2 40.e7 (40.Be4 Qe5 41.g3 Qe4 42.Rc7 Kh6 43.f3 Qd3 44.Rd7 Qe2 45.Kg1 c1Q 46.Rd1 Qcd1) 40...Be7 41.Be4 c1Q 42.Rc1 Qc1 (42...Bd6 43.g3 Qf2 44.Kh1 Qg3 45.Rc2 Qh3 46.Kg1 Qe3 47.Kf1 Qe4 48.Rd2–+) 43.Bc6 (43.g3 Qf1 44.f4 Bc5 45.Bg2 Qe1 46.Be4 Qe3 47.h4 Qe4 48.f5 Qe2 49.Kh3 Qf1 50.Kh2 Qg1 51.Kh3 gf5 52.h5 Qh1) 43...Qc5 (43...Qe1 44.Kg3 Bh4 45.Kf4 Qf2 46.Ke4 Qf5 47.Kd4 Bf6 48.Kc4 Qc2 49.Kd5 Qc5 50.Ke6 Be5 51.Kd7 Qd6 52.Ke8 Bf6 53.e4 Qe6) 44.f4 (44.g3 Qc2 45.Kg2 Bb4–+) 44...Qb4 (44...Qe3 45.g3 g5 46.Bb7 Bc5 47.h4 g4 48.f5 Qg1) 45.Kg3 (45.g3 Qa4 46.h4 Qc2 47.Kh3 a4–+) 45...Qa4 (45...Qe1 46.Kf3 Bc5 47.f5 Qe3 48.Kg4 h5 49.Kh4 Be7 50.f6 Bf6) 46.Kf3 Qb4 (46...Qd1 47.Ke4 Bc5 48.Be8–+) 47.g4 (47.h4 Bc5 48.h5 gh5–+) 47...a4 48.h4 White prepares g5 48...a3 49.h5 a2 50.g5 a1Q 51.h6 (51.Bb7 Qh1 52.Ke2 Qc4 53.Kf2 Qcf1 54.Kg3 Qhh3) 51...Kf8 52.Bd5 (52.Be4 Qd1 53.Kg3 Qbe1 54.Kh3 Qh5 55.Kg2 Qhh1) 52...Qh1 53.Ke2 (53.Kg4 Qh5 54.Kg3 Qe1 55.Kg2 Qhh1) 53...Qb2 54.Kd3 Qd5 0–1. BeepBeepImAJeep (2760) – Kuhaku_1 (2420), lichess.org, 2020.

4.e3 e6 5.Nf3 Be7 6.Be2 0–0 7.0–0 c6 8.a4 d5 9.d3 Bb7 10.Nbd2 Nbd7 11.c4 Nc5 12.h3 Rb8 13.d4 Nce4 14.Ne4 Ne4 15.Nd2 Nd2 16.Qd2 Bb4 17.Qc2 (17.Bc3 Bc3 18.Qc3 dc4 19.Qc4 Rc8=) 17...dc4 18.Bc4 Qg5 (18...Rc8 19.Rfc1=) 19.f4 Qg3 20.Qf2 Qg6 21.Rad1 (21.f5 ef5 22.Qf5 Qf5 23.Rf5 cb5 24.Bb5 Rbc8=) 21...cb5 22.Bb5 Qe4 (22...Be4 23.Rc1=) 23.Bd3 Qd5 24.e4 (24.Rc1 Qa2=) 24...Qd8 (24...Qd7!?=) 25.Qg3+= Be7 (25...Qe8 26.Bb5 Qe7 27.d5+–) 26.e5 (26.f5 ef5 27.d5 Bc5 28.Kh1 f6+–) 26...g6 (26...Bc6 27.Ra1=) 27.Kh2 (27.Rc1 Bd5+=) 27...Qd5 28.Rf2 Bh4?? (better 28...Bc6=) 29.Qh4+– Rbc8 30.Qg3 f5 (30...Bc6 31.Ra1+–) 31.h4 (31.ef6 Rf6 32.Bc2 Ba6+–) 31...Rf7 32.h5 (32.Rb1 Rfc7+–) 32...Rg7 33.h6 Rf7 34.Rdd2 Qd8 (34...Bc6 35.Bc2+–) 35.Rc2 Bd5 (35...Rfc7 36.Rc7 Rc7 37.Qg5 Qg5 38.fg5+–) 36.Rc8 Qc8 37.Rc2 Qf8 (37...Qe8 38.Bb5 Qf8 39.Qg5+–) 38.Bc4 (better 38.Qg5+–) 38...Qh6 39.Kg1 Bc4 (39...Rc7 40.Bb3 Rc2 41.Bc2+–) 40.Rc4 Kg7 (40...Qh5 41.Rc1+–) 41.Qf2 (41.Rc6 Re7+–) 41...Qh5 42.Ba3 (better 42.Qd2!? Qh4+–) 42...Qd1 43.Kh2?? (better 43.Qf1 Qb3 44.Bd6+–) 43...Qh5= 44.Kg1 Qd1 45.Qf1 Qb3 46.Bc1 b5 47.ab5 Qb5 48.Rc2 (48.Qd3 Rd7+–) 48...Qb4 49.Qf2 a4. e4_e5_f4 (1740) – juju85 (1745), lichess.org, 2020.

4.e3 g6 5.c3 Bg7 6.c4 0–0 7.a4 (7.d4 Bb7=) 7...d5 8.Nf3 dc4 (8...Be6 9.d4=) 9.Bc4 Bb7 (9...c6 10.0–0=) 10.0–0 c6 11.d4 cb5 12.ab5 The passed pawn on a5 will become decisive later 12...Nbd7 13.Be2 Re8 14.Nbd2 Nd5 15.Nc4 Nb4 16.Nfe5 Ne5 17.Ne5 (17.de5 Bd5+=) 17...Be5 18.de5 Qc7 (18...Qd1!? 19.Rfd1 Kf8+=) 19.Rc1+= Qd8 20.Bd4 Nd5 (20...Bd5 21.Qa4+–) 21.Bf3 (21.Qa4 e6+–) 21...e6 (21...a4 22.Ra1 Qd7 23.Ra4 Qb5 24.Ra8 Ra8 25.Qb1 Qb1 26.Rb1+–) 22.Qb3 (22.Qa4 f5+–) 22...Qd7 (22...a4 23.Qb2+=) 23.Rfd1 Rac8 (23...a4 24.Qb1 Rec8 25.e4 Rc1 26.Qc1+– (26.Rc1?! Nc7 27.Bb6 Nb5+=)) 24.Rc8+– Rc8 25.Bb6! a4 (25...Nb6 Exploits the pin 26.Rd7) 26.Qb2 (26.Qa4 Nb6 27.Rd7 Na4–+) 26...Qe7 27.Bd4 a3 28.Qb3 Ra8 29.Ra1 Qb4?? (better 29...Qc7+–) 30.Bd5 Qb3 31.Bb3 Ra5 32.Bc4 Ra4 33.Bb3 (33.Ba2 g5+–) 33...Rb4?? (33...Ra5 34.Bc3 Rb5 35.Ra3 g5+–) 34.Ra3+– Kg7 (34...Rb5 35.Bc2+–) 35.h4 (better 35.b6 h6+–) 35...Rb5 36.g4 h5 37.g5 Rb4 38.Bc2 Rc4 39.Bd3 Rc1 40.Bf1 Bd5 41.Ra1 Rc2 42.Bg2 Bc4 43.Re1 Bd3 44.Bf3 Bf5 45.Kg2 Bh3 (45...Bd3 46.Kg3+–) 46.Kg3 (better 46.Kh3 Kf8+–) 46...Bf5 47.e4 Bg4 48.Bg4 hg4 49.Kg4 (49.Kg4 Rc4 50.Rd1+–) 1–0. BeepBeepImAJeep (2745) – Yakimkin_Igor (2615), lichess.org, 2020.

4.e3 g6 5.c4 Bg7 6.a4 c5 7.Nf3 d6 8.Be2 Bb7 9.0–0 e5 10.d4 e4 11.Nfd2 cd4 12.Bd4 d5 (12...0–0!?+–) 13.Nc3+– dc4 (better 13...0–0+–) 14.Nc4 (14.Bc4?! 0–0 15.Qc2 Qc7 16.Nce4 Ne4 17.Ne4 Bd4 18.ed4 Rc8+–) 14...Nbd7?! (14...0–0 15.Nb6 Ra7+–) 15.Nd6 (15.Nd6 Ke7 16.Nb7+–) 1–0. BeepBeepImAJeep (2780) – Oman_Chess (2470), lichess.org, 2020.

4.Nf3 Bb7 5.e3 (--> 3.Bb2 Bb7 4.e3 Nf6 5.Nf3).

4.Nf3 e6 5.e3 Bb7 6.Be2 Be7 7.c4 c5 8.0–0 0–0 (8...d5 9.cd5 Qd5 10.Nc3 Qf5 11.d4 0–0= 0.25; 8...Qc7 9.d3 0–0 10.Nbd2 d6 11.e4 Nbd7= 0.12) 9.Nc3 (9.d4 d5 10.Nbd2 Nbd7 11.Rc1 Rc8= 0.03) 9...Qc7 (9...d5 10.cd5 Nd5 11.Qa4 Nd7= 0.06) 10.Qc2 (10.d4 cd4 11.Qd4 d6+= 0.34) 10...d5 (10...Ng4 11.Ne4 f5= 0.19) 11.d3 (11.cd5 ed5= 0.22) 11...Nbd7 (11...Bd6= 0.12) 12.h3 Rad8 13.Rfd1 Ne8 (13...d4 14.ed4 Bf3 15.Bf3 cd4 16.Ne4=) 14.cd5 ed5 15.Rac1 Nef6 16.Na4 Rfe8 17.d4 c4 18.Ne5 Bd6 19.Nd7 Qd7 20.Nb6 Qb5 21.Na4 Rc8 22.Rb1= Ne4 23.Bc3 Bb4 24.Bb4 ab4+= 25.Nc3 Qa5 26.Ne4 Re4 27.Bf3 Re7 28.a4?? ba3 29.Ra1 Bc6 30.Ra2 Ba4 31.Ra3?? Bc2–+ 32.Ra5 Bd1 33.Rd5?? Bf3 34.gf3 c3 0–1. NN – Fritz 6, 2008.

3.c4 Bb7

4.ba6 Ra6 5.c5 bc5 6.e3 Bc6 7.Ba6 Na6 8.Nc3 Nb4 9.Qe2 Qb8 10.Kf1 d5 11.Ba3 Nc2 12.Bc5 Na1 13.Nd1 Bb5 14.d3 e5 15.Qb2 Bd3 16.Ke1 Qb2 17.Nb2 Nc2 18.Kd2 Be4 19.Bf8 Kf8 20.f3 Bg6 21.Ne2 Nf6 22.Rc1 Nb4 23.Rc7 Kg8 24.Rc8 Ne8 25.Re8 1–0. AleksandrNekhoroshik – KingSide1127, lichess.org, 2020.

4.Bb2 d6 5.a4 e5 6.Nf3 Be7 7.e3 Nf6 8.Be2 0–0 9.0–0 Nbd7 10.d3 Nc5 11.Nbd2 Re8 12.Qc2 Qd7 13.d4 ed4 14.ed4 Ne6 15.Bd3 g6 16.d5 Nc5 17.Nd4 Nd3 18.Qd3 Bf8 19.Nc6 Bc6 20.dc6 Qe6 21.Rae1 Qg4 22.Bf6 Re1 23.Re1 Bh6 24.Ne4 Re8 25.Bc3 f5 26.Nf6 1–0. Adjailton (1795) – Keesvantol (1685), lichess.org, 2020.

4.Bb2 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 b6 4.c4 Bb7).

4.Nc3 c6 5.d4 d5 6.bc6 Bc6 7.cd5 Bd5 8.e4 Bb7 9.Nf3 Na6 10.Bb5 1–0. marus1 – patterson, internet, 2001.

4.e3 d5 5.cd5+= Qd5 6.Nc3 Qd7 7.Bb2 Nf6 8.Nf3 e6 9.Be2 Be7 (9...Bd6 10.0–0=) 10.0–0 (10.Ne5 Qd6 11.Bf3 Bf3 12.Qf3 Ra7+=) 10...0–0 11.a4 c5 12.Ne5 Qc7 13.f4 Bd6 (13...Nbd7 14.Nc4=) 14.Nc4 Nbd7 15.Bf3 Be7 16.Qe2 Bf3 17.Rf3 Rad8 18.Rh3 (18.e4 Rfe8+=) 18...Rfe8 19.g4 (19.d3 Nd5=) 19...h6 (19...Nd5!?=) 20.g5+= hg5 21.fg5 Nh7 22.Qh5 Ndf8 23.Ne4 Rd5 24.Rg3 (24.Rf1 Bg5 25.Ne5+=) 24...Qd8 (24...Ng6 25.Rf1 Red8 26.Bg7 Kg7 27.Rf7 Kf7 28.Qh7 Kf8 29.Nf6 (29.Qg6 Rf5 30.Rh3 Rg5 31.Ng5 Qg3 32.hg3 Bg5 33.Rh8 Ke7 34.Qg7) 29...Bf6 30.Qc7+–) 25.Rf1 (better is 25.Ne5!? g6 26.Qf3 Re5 27.Be5+–) 25...Rf5+= 26.Rf5 ef5 27.Ne5 (27.Nc3 Ng5 28.h4 Nge6+=) 27...Qd5=+ (27...fe4?? 28.Qf7 Kh8 29.Ng6 Ng6 30.Qg7) 28.Nf6 Bf6 29.gf6 Nf6 30.Rh3?? (better is 30.Qg5 Nh5 31.Qh5 Re5 32.d3+/–) 30...N8h7 (better is 30...Nh5 31.Rh5 Qd2 32.Rf5 Qb2–+) 31.Nf3?? (31...Nh5 32.Be5–+; better is 31.Qf5 Qd2 32.Nc4 Qd1 33.Qf1 Qa4 34.Nb6–+). Markus,Roland – Wartig,Wolfgang, corr SOK–89–41, 1990.

4.e3 e5 5.Bb2 d6 (5...e4 6.Nc3=) 6.d4+= c6 (6...Nd7!?+=) 7.de5+– cb5 8.cb5 Nd7 (8...de5 9.Qd8 Kd8 10.Be5+–) 9.ed6 Nc5 (9...Ndf6 10.Be5 Rc8 11.Nc3 Bd6 12.Qd6 Qd6 13.Bd6 Rc3 14.Be5+–) 10.Nf3 (10.Na3 Nf6+–) 10...Nf6+– 11.Be2 (11.Nbd2 Bd6 12.Nc4 Bc7+–) 11...Bd6 12.Na3 Nce4 13.Nc4 Bb4 14.Kf1 Qe7 (14...Bd5 15.Bf6 Nf6 16.Qd4+=) 15.Nb6 Nf2 (better 15...Rd8!? 16.Qb3 0–0+=) 16.Bf6+– (16.Kf2? Ng4 17.Kg3 Bd6 18.Qd6 Qd6 19.Kg4 Qb6–+) 16...Nd1 17.Be7 Ne3 18.Kf2 Ke7 19.Na8 (19.Ke3?! Bc5 20.Kf4 Bb6+=) 19...Nd5 20.Rac1 Ba8 (20...Ra8 21.Nd4+–) 21.Nd4 (21.Rc2 Re8+–) 21...Bd2? (21...Nc3 22.Nc6 Bc6 23.bc6 Na2+–) 22.Nc6+– Kf6? (22...Kd6 23.Rc4 Rc8+–) 23.Rcd1 (23.Rcd1 Be3 24.Kf3 Bc6 25.bc6+–) 1–0. Heinola,Kari – Paavilainen,T, Turku op ch–SF, 1984.

4.e3 e5 5.Bb2 e4 6.Ne2 =.

4.e3 e6 5.Nf3 d5 6.Bb2 c5 7.d4 Nf6 8.Nbd2 Nbd7 9.Be2 Bd6 10.0–0 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7 7.Be2 0–0 8.0–0 b6 9.d4 Bb7 10.Nbd2 a5).

4.e3 Nf6 5.Nc3 e6 6.a3 Be7 7.Qc2 0–0 8.Be2 Bg2 9.Bf3 Bh1 10.Bh1 c6 11.a4 Ra7 12.Bb2 Rc7 13.d3 d5 14.Nge2 cb5 15.Nb5 Rc8 16.Qb3 Bb4 17.Bc3 Nc6 18.0–0–0 Ng4 19.Bg7 dc4 20.Qb2 cd3 21.Ned4 Nd4 22.Kb1 Nb5 23.ab5 f6 24.Bf8 Kf8 25.h3 Ne5 26.Be4 Bc3 27.Qb3 Qd6 28.f4 Nc4 29.Bd3 Nd2 30.Rd2 Bd2 0–1. ArgosZgZ (1700) – tom19chess (1765), lichess.org, 2020.

4.Nf3 d6 5.d4 Bf3 6.ef3 c5 7.d5 h6 8.Bb2 Qc8 9.Bd3 e6 10.0–0 ed5 11.Re1 Be7?? (better 11...Ne7 12.cd5 Nd7+–) 12.Bg7 (12.cd5?! Nf6+–) 12...d4 13.Bh8 Kf8 14.Qe2 Ra7 15.Nd2 f5 16.Qe6 (better 16.f4 Bf6 17.Bf5 Qd8 18.Bf6 Nf6+–) 16...Qe6 17.Re6 h5 (17...Bg5 18.Rd6 Rh7 19.Be5+–) 18.Rae1 Nd7 19.Bf5 a4 20.Ne4 a3 21.Nd6 Ngf6 (21...Ndf6 22.Nc8 Rc7 23.Ne7 Ne7 24.Rf6 Kg8 25.Re5 Nf5 26.Re8 Kh7 27.Rf5+–) 22.Bf6 (22.Re7 Kg8 23.Bf6 Nf6 24.Ra7 h4 25.Ree7 Kf8 26.Bh7 Nh7 27.Re8) 22...Bf6 23.Bg6 h4 (23...Kg8+–) 24.Nf5 Ne5 (24...Be7 25.Re7 Kg8 26.Nh6 Kf8 27.Rf7) 25.Re8 1–0. Reuter,Alfred (1615) – Borup,John, KO–002 VCC, 2000.

4.Nf3 Nf6 5.e3 g6 6.Nc3 Bg7 7.d4 d6 8.Be2 0–0 9.0–0 Nbd7 10.Nd2 e5 11.Bf3 Bf3 12.Nf3 Re8 13.h3 ed4 (13...Qe7 14.Re1=) 14.ed4+= Ne4 15.Ne4 Re4 16.Qd3 Qe7 17.Bg5 Bf6 18.Be3 Re8 19.Rae1 Qd8 20.Re2 R4e7 21.Rfe1 Nf8 22.d5 Nd7 23.Qc2 Nc5 24.Kh1 (24.Nd4 Bd4 25.Bd4 f6+=) 24...Ne4 (24...Re4 25.g3=) 25.Bd4 (25.Nd4 Bd4 26.Bd4 Nc5+=) 25...Bd4= 26.Nd4 Nc5 27.Re7 (27.f4 Re2 28.Re2 Re2 29.Qe2 Kf8=) 27...Re7=+ 28.Nc6?? (better 28.Rd1 Re4 29.g3=) 28...Re1–+ 29.Kh2 Qg5 (29...Qg5 30.g3 Ne4–+) 0–1. bla_ner (1915) – yzerman123 (2185), gameknot.com, 2015.

4.Nc3 c5

5.Bb2 Nf6 6.Nf3 g6 (6...e6 7.e3=) 7.e3 Bg7 8.Be2 0–0 9.0–0 d5 10.Nd5 Nd5 11.Bg7 Kg7 12.cd5 Qd5 13.d4 Nd7 14.dc5 (14.Qa4 Rac8+=) 14...Qd1 (14...Nc5!? 15.Qd4 Qd4 16.ed4 Ne6=) 15.Rfd1+= Nc5 16.Ne5 Rfd8 17.Nc4 Nd7 (17...Na4 18.Rac1+=) 18.Rd2 (18.Rd7 Rd7 19.Nb6 Rd2 20.Na8 Re2+/–) 18...Kf8 (18...Nc5 19.Rd8 Rd8 20.Nb6+=) 19.Rd7 (19.Rad1!? Ke8+–) 19...Rd7+/– 20.Nb6 Rd2 21.Na8 Ba8 22.Bf3 (22.Bc4 Rc2 23.Bb3 Rb2+–) 22...Bf3+= 23.gf3 Rb2 24.a4 Rb4 (24...e5 25.Kg2+/–) 25.f4 e6 26.Kf1 Ke7 27.Ke2 Kf6 28.Kd3 Kf5 29.Rc1 (29.h3!?+/–) 29...Rb3? (better is 29...Ra4!? 30.Rc7 Ra3 31.Kc4 Kf6+=) 30.Kc4 (30...Rb2 31.Kd4+/–; 30.Rc3!? Rb4 31.Rc4 Rb3 32.Kc2 Ra3+/–) 1–0. Mothes,Rainer – Wartig,Wolfgang, corr SOK–90–61, 1990.

5.e4+= d6 6.d4 cd4 7.Qd4 Nd7 8.Nf3 Nc5 9.Bd3 Nf6 10.h3 (10.0–0 Nd3 11.Qd3 Rc8+=) 10...e5 11.Qe3 Be7 12.0–0 0–0 13.Bc2 Rc8 14.Rd1 Rc7 (14...Qc7!?=) 15.Ne5+/– Qa8 16.Nc6 Bc6 17.bc6 Qc6 18.Nd5 Nd5 19.ed5 Qd7 20.Rb1 Rb8 21.Ba3 b5 22.cb5 (22.Bc5 Rc5 23.Bd3=) 22...Rb5 23.Rb5 Qb5 24.Rb1 Qd7 (24...Qe8 25.Bb2+/–) 25.Rb8+/– Bd8?? (better is 25...Bf8+/–) 26.Bf5!!+– (26...Ne6 27.de6+–) 1–0. Seack,Ingo – Wartig,Wolfgang, corr SOK–92–88, 1992.

4.Nc3 e6

5.e3 d5 6.cd5 ed5 7.Nf3 Nf6 8.Bb2 (8.d4 c5+=) 8...c5 (8...Bd6 9.Rc1=) 9.bc6+= Nc6 10.Nb5 (10.Bb5 Bd6+=) 10...Rc8 11.Be2 Be7 12.0–0 0–0 13.Rc1 Nb4 (13...Re8 14.Nfd4=) 14.a3+= Na6 15.Rc8 Qc8 16.Qb1 Nc5 17.Rc1 Qe8 18.Bf6 Bf6 19.Nd6 Qc6 20.Nb7 (20...Qb7 21.Rc5+–) 1–0. Brinkmann,Wilhelm – Wartig,Wolfgang, corr SOK–89–41, 1989.

5.e3 g6 6.Bb2+= Bg7 7.d4 c5 (7...Nf6!?=) 8.dc5+= bc5 9.Qd6 Ne7 (9...Qe7 10.Rd1+/–) 10.Qc5 (10.Rb1 0–0+/–) 10...0–0 (10...d6 11.Qg5+/–) 11.Qd6 Nf5 12.Qd3 Nh4 13.e4 f5 14.Rb1 fe4 15.Ne4 Rf4 16.Nd6 (better is 16.f3!?+–) 16...Bg2+= 17.Qg3 Bh1 (17...Rf3 18.Nb7 Qe7–+ (18...Rg3 19.Nd8 Rb3 20.ab3 Bh1 21.Bg7 Kg7 22.c5+/–)) 18.Qf4+/– Nf5 19.Bg7 Kg7 20.Nf5 (20.c5 Nd6 21.Qe5 Qf6 22.Qf6 Kf6 23.cd6 Ke5=) 20...gf5 (20...ef5 21.Qd4 Kg8 22.c5+/–) 21.Nf3 (21.Qg3 Kh8+/–) 21...Bf3 22.Qf3 Ra7 23.b6 (23...Ra6 24.c5+–) 1–0. Gross,Wilhelm – Wartig,Wolfgang, corr SOK–92–80, 1992.

5.e3 Nf6

6.Bb2 =.

6.Nf3 Bb4 7.Be2 =.

6.Nf3 d5 7.Bb2 Bd6 8.d4 0–0 9.a4 Nbd7 10.Be2 dc4 11.Bc4 Ne4 12.Ne4 Be4 13.d5 Bb4 14.Ke2 Bf3 15.gf3 e5 16.Rg1 Qh4 17.Qc2 Bd6 18.Rg4 Qe7 19.Rag1 g6 20.h4 f5 21.Rg5 Kf7 22.Bd3 Rg8 23.Bf5! gf5 24.Rf5 Nf6 25.Rgg5 Rg6 26.f4 Rg5 27.fg5 Qd7 28.Rf6 Kg7 29.Qf5 1–0. Nicklich – Otte, corr DDR–M–618 1980.

6.Nf3 d5 7.Bb2 Bd6 8.d4 0–0 9.Bd3 dc4 10.Bc4 Nbd7 11.0–0 c5 12.dc5 Nc5=+ 13.a3 Rc8 14.h3 Nce4 15.Ne4= Be4 16.Qd4 Qc7 17.Rfc1 Bc5 18.Qe5 Bf3 19.Qc7 Rc7 20.gf3 Rd8 21.Bb3 Rcd7 22.a4 ½–½. Rosner,Dirk – Wartig,Wolfgang, corr SOK–91–77, 1991.

6.Nf3 d5 7.Bb2 Nbd7 8.d4 Bb4 9.a3 Bc3 10.Bc3 0–0 11.Bb2 Ne4 12.cd5 Bd5 13.Rc1 Rc8 14.Bd3 Ng5 (14...f5!?=) 15.Nd2+/– f5 16.0–0 Nf6 17.f3 Qe7 18.Qe1 c5 19.e4 fe4 20.fe4 Bb7 21.Qe3 Nd7 22.Rf8 Rf8 23.Qg3 e5 24.Bc4 Kh8 25.de5 Ne4 26.Ne4+– Be4 27.Rd1 Rd8?? 28.e6 Nf6 29.Rd8 Qd8 30.e7! (30…Qd1 31.Bf1+–) 1–0. marekt – unikum, ChessWorld.net, 2004.

4.Nc3 Nf6

5.Bb2 d6 6.Nf3+=.

5.Bb2 e5 6.e4 (6.Nf3!?+=) 6...Bb4= 7.f3 d6 8.Nge2 Nbd7 9.a3 Bc3 10.Nc3 Nc5 11.g3 (11.Be2 Nh5 12.g3 0–0=) 11...h5 12.Be2 h4 13.Kf2 Nh5 14.Nd5 Bd5 15.cd5 Qg5 16.g4 Nf4 17.d4 ed4 18.Bd4 0–0 19.Bc4 Rae8 20.Re1 g6 (20...h3 21.Kg1–/+) 21.Bb2 (21.Kg1 f5 22.ef5 gf5–/+) 21...f5 (21...Nd7 22.Kg1–/+) 22.Qd4=+ Re5 23.ef5 gf5 24.Kf1? (24.Kg1 Nd7 A) 25.Re5 A1) 25...Ne5?! 26.Kh1 Nf3 27.Qh8 Kf7 28.Qh7 Ke8 29.Rf1 (29.Qc7?? Qg4 30.Qc6 Kf7 31.Qc7 Kg8 32.Qg7 Qg7 33.Bg7 Kg7–+) 29...Qg4 30.Qg7–+; A2) 25...de5 26.d6 Kg7–+; B) 25.Kh1 fg4 26.fg4=) 24...Ng6–+ 25.Bc1 (25.h3 fg4 26.Qg4 Rf3 27.Qf3 Rf5 28.Re8 Kh7 29.Qf5 Qf5 30.Kg1 Qc2–+) 25...Qf6 26.Re2 (26.Bb2 Re1 27.Re1 Qd4 28.Bd4 fg4–+) 26...fg4 27.Qg4 Rf5 28.Rf2 Ne4 29.Qe4 Qa1 30.Qe6 Kh8 31.Qe3 Rf4 32.Be2 Ne5 33.h3 Qb1 34.Ke1 R8f7 35.Kd1 (35.Rf1 Re7 36.Qc3 Qc1 37.Qc1 Nd3 38.Kd2 Nc1 39.Rc1 Kg7–+) 35...Kg8 36.Ke1 Kf8 37.Qc3 (37.Qd2 Qb3 (37...Nf3?! 38.Bf3 Rf3 39.Qh6 Kg8 40.Qg5 Kf8 41.Qh6 Ke8 42.Rf3 Rf3 43.Qe6 Kd8 44.Qg8 Ke7 45.Qe6 Kf8 46.Qc8 Kf7 47.Qd7 Kf8 48.Qc8 Kf7 49.Qd7 Kf8 50.Qc8=) 38.Kf1 Nc4 39.Bc4 Qc4 (39...Rc4?! 40.Qh6 Rg7 41.Qh8 Kf7 42.Qh5 Rg6 43.Qh7 Rg7 44.Qh5 Kg8 45.Qe8 Kh7 46.Qh5 Kg8 47.Qe8 Kh7 48.Qh5 Kg8=) 40.Kg2 Qd4 (40...Qb5?! 41.Kh2–+) 41.Qd4 Rd4–+) 37...Rg7 38.Rf1 Rg2 39.Rf2 Rg3 40.Qe3 (40.Rf1 Rf7–+) 40...Rf7 41.Kd2 (41.Rf1 Kg8 42.Qc3 Qa2–+) 41...Rg1 (better 41...Qa2 42.Kc3 Qd5–+) 42.Rf1 (42.Qc3 Qa2 43.Bb2 Qd5 44.Qd4–+) 42...Rf1 43.Bf1 Qa2 44.Kd1 (44.Ke1 Nf3 45.Kd1 Qd5 46.Qd3 Nd4–+) 44...Qd5 45.Bd2 (45.Kc2 Rf3 46.Qh6 Ke7 47.Qh7 Qf7 48.Qf7 Kf7–+) 45...Rf3 46.Qh6 Ke8 47.Be2 (47.Bg2 Qb3 48.Ke2 Qb5 49.Kd1 Qb3 50.Ke2 Qc4 51.Kd1 Rg3 52.Qh5 Ke7 53.Bg5 Kd7 54.Qh7 Qf7 55.Qf7 Nf7 56.Bh4 Rg2–+) 47...Ra3 48.Qh8 (48.Qf4 Qh1 49.Be1 Ra1 50.Kc2 Qe1 51.Bh5 Ke7 52.Qg5 Ke6 53.Bg4 Kd5 54.Qd2 Qd2 55.Kd2 Ng4 56.hg4 h3 57.Kc3 Ra3 58.Kd2 h2 59.Kc2 Rf3 60.g5 h1Q 61.g6 Qg2 62.Kb1 Rf1) 48…Kd7 (48...Kd7 49.Bg4 Ng4 50.Qg7 Ke8 51.Qg4 Ra1 52.Ke2 Qb5 53.Ke3 Qe5 54.Kd3 Qg3 55.Qg3 hg3–+) 0–1. cachisss (1940) – yzerman123 (2280), gameknot.com, 2015.

5.Nf3 d6 6.d4 Nbd7 7.Qc2 e5 8.e4 Be7 9.Bd3 0–0 10.0–0 ed4 11.Nd4 Ne5 12.Nd5 Nd3 13.Qd3 Bd5 (13...Nd7!?+=) 14.cd5+/– Ng4 15.Bb2 Ne5 16.Qh3 Nc4 (16...Bf6!?+–) 17.Bc3 Bf6 (17...Ne5 18.f4 Ng6 19.Nc6+–) 18.Nc6 Qc8 (18...Qe8 19.Bf6 gf6+–) 19.Qg3 Ne5 20.f4 (20.Be5?! Be5 21.f4 Ba1 22.Ne7 Kh8 23.Nc8 Bd4 24.Kh1 Rac8+–; 20.Ne5?! Be5 21.Be5 de5 22.Qe5 Qd7+–) 20...Nc6 (20...Qg4 21.fe5 Qg3 22.hg3 de5+–) 21.Bf6 (21.dc6?! Bc3 22.Qc3 Re8+=; 21.bc6?! Bc3 22.Qc3 Qg4+=) 21...g6 22.Qg5 Qd8 23.bc6 Qf6 24.Qf6 Rfe8 25.e5 de5 26.fe5 Rad8 27.Qf7 (27…Kh8 28.d6+–) 1–0. MT – darrellmac (1730), ICC, 2004.

5.Nf3 g6 6.Bb2 Bg7 7.e3 0–0 8.d4 d6 9.Be2 Nbd7 10.0–0 Re8 11.a4 Ne4 (11...Rc8 12.Qd3+=) 12.Qc2 (12.Ne4 Be4 13.Ng5 Bb7+/–) 12...Nc3+= 13.Bc3 e5 14.Qd2 (14.d5 Qf6+=) 14...Nf6 (14...ed4 15.Nd4 Nc5 16.Qb2=) ½–½. Bivens – McCumiskey, corr, 1989.

5.Nf3 g6 6.Bb2 Bg7 7.e3 0–0 8.Be2 d6 9.0–0 Nbd7 10.d4 e5 11.Qb3 e4 12.Nd2 Qe7 13.Rac1 Rfe8 14.a3 Rad8 15.Rfd1 Nf8 16.c5 d5 17.Na4 Qe6 18.Rc3 h5 19.Rdc1 Ng4 20.cb6 cb6 21.Rc7 Rd7 22.Rd7 Nd7 23.h3 Ngf6 24.Rc7 Ba8 25.Qc2 (25.Qc3 Kh7+=) 25...Nf8 26.Nb3 Rd8 27.Nbc5 (better is 27.Qd2+=) 27...bc5–/+ 28.dc5 d4 (28...Rb8 29.Ra7=+) 29.Bd4 Nd5 30.Ra7 Bd4 31.ed4 e3 32.Bc4 (32.Ra5 ef2 33.Kf2 Qe3 34.Ke1 Nf4 (34...Qd4?! 35.Qd3 Qg1 36.Kd2–+) 35.Ra8 Ra8–+ (35...Ne2?! 36.Qe2 Qg1 37.Qf1 Qf1 38.Kf1 Ra8 39.Nc3–/+)) 32...Nd7 33.Ra6 ef2 34.Qf2 Qe3? (better is 34...Qe4!?+/–) 35.Ra8!+– Qf2 (35...Ra8 36.Bd5) 36.Kf2 Ra8 37.Bd5 Rd8 38.c6 Nf6 39.Nc3 Ne8 40.b6 (40...h4 41.c7 Nc7 42.bc7+–) 1–0. Dopper,Johan – Cottarelli,Franco, corr, 1990.

5.Nf3 g6 6.Bb2 Bg7 7.e3 0–0 8.Be2 d6 9.0–0 e5 10.d4 e4 11.Nd2 Re8?! (11...Nbd7) 12.c5! dc5 13.dc5 bc5 = 14.Na4 Nbd7 15.Nb3 Qe7 16.Qc1 c4 17.Bc4 Ng4 18.Bg7 Qd6 19.g3 Kg7 20.Qd1 Nde5 21.Qd6 cd6 22.Be2 Nf3 23.Bf3 ef3 24.Nd4 Rac8 25.Rac1 h5 26.Nb6 Rc5 27.Rc5 dc5 28.Nb3 h4 29.gh4 Rh8 30.h3! Nf6 31.Nc5 Be4 32.Ne4 Ne4 33.Na4! Rh4 34.b6 Ng5 35.Rb1 Rh8 36.Rb5 Nh3 37.Kh2 Nf2 38.Kg3 Ne4 39.Kf3 f5 40.Ra5?? Rh2 0–1. Katalymov – Simagin, 1958.

5.Nf3 e6

6.Rb1 =.

6.Bb2 Bc5 =.

6.Bb2 Be7 7.e3 0–0 8.d4 d6 9.Bd3 Nbd7 10.e4 e5 11.0–0 ed4 12.Nd4 Nc5 13.Nf5 Re8 14.Bc2 Bf8 15.f3 g6 16.Ng3 Bg7 17.Rb1 Qd7 (17...Nfd7!?=) 18.Nd5 Nd5 19.ed5 Bb2 20.Rb2 f5 21.Qd2 Qe7 22.Rbb1 Qe3 23.Rf2 Qd2 24.Rd2 Re3 25.Ne2 Rae8 26.Kf2 Bc8 27.Nf4 Rc3 28.Bb3 a4 (29.Re2 Re5 30.Re5 de5=+) =+. de Visser,Arno – Feilmayr,Erwin, corr ICCF TT, 2004.

6.e3 c5 7.Bb2 d5 8.cd5 ed5 9.d4 c4 10.Be2 Be7 11.0–0 0–0 12.Ne5 Nbd7 13.f4 Bb4 14.a4 Bc3 15.Bc3= Ne4 16.Be1 f6 17.Ng4 Rc8–/+ 18.Rf3 f5 19.Ne5=+ g5 20.Rf1 gf4 21.ef4 Ndf6 22.Qc2 h5 23.Bh4+= Rc7 24.Rf3 Rg7 25.Rh3 Rh7 26.Bf6 Rf6 27.Rh5 Rh5 28.Bh5 Rh6 29.Nf7 Qh4 30.Nh6 Kh7 31.Nf5 Qh5 32.Ng3 Qh4 33.Ne4 de4 34.g3 Qg4 35.Qc4 (35...Kh8 36.Qc7+–) 1–0. Ziese,Gerhard – Wartig,Wolfgang, corr SOK–89–48, 1989.

6.e3 d5 7.Bb2 c5 8.cd5 ed5 9.d4 c4 10.Be2 Bb4 11.0–0 Bc3 12.Bc3 0–0 13.Nd2 Re8 14.Bf3 Qc7 15.Qc2 Nbd7 16.Rfe1 Ne4 17.Ne4 de4 18.Be2 Bd5 19.Rac1 Nf6 20.Qa4 Rec8 21.Bb2 Ne8 22.Rc2 Nd6 23.Ba3 Ra7 24.Rec1 h6 25.Bd6 Qd6 26.Bc4 Bc4 27.Rc4 Re8 28.R1c3 Rb7 29.h3 Ree7 30.Rc6 Qd7 31.Rc8 Re8 32.Re8 Qe8 33.Qc2 Qe7 34.Rc8 Kh7 35.Qc6 f5 36.d5 Rd7 37.Qe6 Qe6 38.de6 Re7 39.Rc6 Rb7 40.a4 Kg6 41.Kf1 h5 42.h4 Kf6 43.Ke2 Rb8 44.Kd2 Rd8 45.Kc3 Rd3 46.Kc4 Rd2 47.Rb6 1–0. Poschmann – Roos, email CTON 1996.

6.e3 Be7 7.Bb2 0–0 8.Be2 d5 (8...e5 9.0–0 e4 10.Nd4+=) 9.0–0 c5 10.bc6 (10.d4 dc4 11.Bc4 cd4 12.Nd4 e5+=) 10...Bc6 11.d4 Na6 12.Ne5+= Bb7 13.Rc1 Ne4 14.cd5 Nc3= 15.Rc3 Bd5 16.a3 Bd6= 17.f4 Nc7 18.Qc2 b5 19.e4 b4 20.Rc7 Be4 21.Qe4 Qc7 22.ab4 ab4 23.Rc1 Qe7 24.Bc4 Be5 25.Qe5 Rfe8 26.d5+– f6 27.Qe3 b3 28.de6 Rec8 29.Bb3 Rcb8 30.Bd5 Ra5 31.Rc7! Qe8 32.Bc6 Rb2 33.Be8 (33...h6 34.Bf7 Kh7 35.e7 Ra1 36.Rc1 Rc1 37.Qc1+–) 1–0. Dopper,Johan – Petersen, corr 3GMM–07, 1995.

6.e3 Be7 7.d4 =+.

4.d4 e6

5.a3 Nf6 =.

5.Bb2 c5 6.d5 ed5 7.cd5 Nf6 8.Nc3 Bd6 9.Nf3 0–0 10.e4 Re8 11.Bd3 Nd5 (better is 11...Ne4!? 12.Ne4 f5+=) 12.Nd5+= Bd5 13.Qc2?? (better is 13.Be2 Be4 14.Qd6 Bf3 15.gf3+/–) 13...Be4 14.Be4 f5 (better is 14...Qe7 15.Nd2 f5+=) 15.Nd2?? (better is 15.Qc4 Kh8 16.Qd5+/–) 15...fe4 16.0–0 Be5 17.Rae1? Bb2–+ 18.Qb2 d5 19.a4 Ra7 20.Re3 Rae7 21.Rg3 Nd7 22.Re1 Nf6?? 23.Qf6+= Kh8 24.Qh4 c4 25.Rh3 h6 26.Rhe3 Qc7 27.Ne4 de4 28.Re4 Re4 29.Re4 Re4 30.Qe4 c3 31.Qe8 Kh7 32.Qe4 Kh8 33.Qe8 Kh7 34.Qe4 g6 35.Qc2 Qc4 36.h4 Qb4 37.h5+/– Kh8 38.hg6 Qb2?? 39.Qf5 Qb4 40.Qf6 Kg8 41.Qf7 (41.Qf7 Kh8 42.Qh7#) 1–0. typ48 – hogar29, kurnik, 2012.

5.Bb2 Nf6 6.Nd2 Be7 7.Qc2 a4 8.a3 0–0 9.Ngf3 c6 10.e3 d5 11.c5 bc5 12.bc6 Nc6 13.dc5 Qa5 14.Bd4 Nd7 15.Rb1 Ba6=+ 16.Bd3 Bd3–+ 17.Qd3 Nc5 18.Qc2 Nd4 19.Nd4 Ne4 20.Rb5?? Qd2 21.Qd2 Nd2 22.Kd2 Ba3 23.Ra1 Bd6 24.Ra2 Rfb8 25.h3 Rb5 26.Nb5 Bf8 27.Nc3 Bb4 28.Kd3 a3 29.Nb5 Kf8 30.Kd4 Ke7 31.Ke5 Ra5 (32.Kd4 Rb5–+) 0–1. Merkl – Wartig,Wolfgang, corr SOK–89–30, 1989.

5.Nc3 Bb4 6.Bb2 a4 7.a3 Bc3 8.Bc3+= Qg5 9.f3 Nf6 10.Nh3 Qh6 11.Qd2 Qd2 12.Bd2 0–0 13.e4 c6 14.Be2 cb5+/– 15.cb5 d5 16.e5 Nfd7 17.0–0 f6 18.f4 h6 19.Bg4 f5 20.Be2 g6 21.Rac1 Rc8 22.Bb4 Nf8 23.Rc8 Bc8 24.Rc1 Nbd7 25.Rc7 Kf7 26.Bd1 Nh7 27.Ba4! Ra4 28.Rc8 Ra7 29.Rc6 Nhf8 30.Kf2+– Nh7 31.Ke3 g5 32.g3 g4 33.Nf2 h5 34.Nd3 Ra8 35.Bd6 Ra5 36.Kd2 Rb5 37.Bb4 Nhf8 38.a4 (38...Rb4 39.Nb4+–) 1–0. Seifert,J – Wartig,Wolfgang, corr SOK–89, 1989.

3.c4 d5

4.d3 dc4=+ 5.d4 (5.dc4 Qd1 6.Kd1 e5=+) 5...e5 6.Nf3 (6.e3 ed4 7.Bc4 Bb4 8.Kf1 Nf6=+) 6...f6 (better is 6...e4 7.Bg5 f6–+) 7.e4 ed4 8.Bc4 Bb4 9.Bd2 Bc5 10.0–0 Bg4 11.Qb3 Ne7 12.Bf7 Kf8 13.Bc4 Nd7 14.Ne1 (14.Rc1 Ne5=) 14...Ne5 15.f3 (15.Nd3 a4 16.Qc2 c6=+) 15...Bh5 (15...a4 16.Qd1 d3 17.Kh1 Bc8=+) 16.Nd3= Nd3 (16...Nc4 17.Qc4 Bf7 18.Qa4=) 17.Qd3 Bf7 18.Kh1 (18.Rc1 c6=) 18...Ng6 (better is 18...c6=+) 19.Na3?? (better is 19.Bf7 Kf7 20.Qb3 Ke8 21.Rd1=) 19...Ne5–+ 20.Qb3 (20.Qc2 Ba3 21.Bf7 Nf7 22.Rad1–+) 20...Qe8?? (better is 20...a4 21.Qc2 Ba3 22.Bf7 Kf7–+) 21.Bf7=+ Qf7 22.Qf7 Kf7–/+ 23.f4 Nd7 24.Nc4 Rhe8 25.a4? Nf8 26.e5–/+ f5 27.Nb2 Ne6 28.Nd3 Be7 29.Rac1 Rac8 30.Rc6 Nd8 31.Rc2 ½–½. calu_mishu (1615) – fantom, internet, 2006.

4.cd5+= Qd5 5.e3 (5.Nc3 Qe6+=) 5...Bb7 (5...e5 6.Nc3 Qc5 7.Qf3+=) 6.Nc3+= Qd8 7.Ba3 Nf6 8.Be2?? (better is 8.d4=) 8...Bg2–+ 9.Bf3 Bf3 (better is 9...Bh1 10.Bh1 Ra7–+) 10.Qf3=+ Nbd7 11.d4 e6 12.Bf8 Nf8 13.Qc6 N8d7 14.Ne4 (14.Nf3!?=) 14...Ne4–/+ 15.Qe4 0–0 16.Nf3 Nf6 17.Qc2 Qd5 18.Ke2? (18.Qc6 Qc6 19.bc6 Rad8=+) 18...Rac8 (better is 18...Qb5 19.Qd3 Qh5–+) 19.Rac1? (better is 19.Qc6!?=+) 19…Qb5–+ (20.Qc4 Qh5–+) 0–1. Woelfelschneider,Peter – Wartig,Wolfgang, corr SOK–91–77, 1991.

4.cd5!? Nf6 5.d4 =.

3.c4 d6

4.Bb2 e5 5.e3 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 e5 5.c4 b6).

4.e4 Bb7 5.d3 (5.Nc3 Nf6 6.d3 e6 7.Nf3 d5 8.ed5 ed5 9.Qe2=; 5.f3 e5 (5...Nf6 6.d4 e5 7.Ne2 Be7 8.de5 de5 9.Qd8=) 6.Bb2 Be7 7.d4 ed4 8.Ne2 Bf6 9.Nd4=; 5.Qe2 Nf6 (5...e5 6.Nc3 Nf6 7.Nd5 Be7 8.Nf3 0–0 9.d3=) 6.Nc3 e5 7.Nf3 Be7 8.Nd5 0–0 9.d4=) 5...e6 (5...Nf6 6.Nf3 e6 7.Be2 Be7 8.0–0 0–0 9.Nc3+=) 6.Nd2 d5 7.cd5 ed5 8.Bb2 c6 9.bc6 =.

4.e4 Nd7 5.d4 (5.Nc3 e5 (5...Ngf6 6.d4 e5 7.Nf3 ed4 8.Nd4 Nc5 9.f3+=) 6.Nf3 Ngf6 7.d4 ed4 8.Nd4 Nc5 9.f3+=; 5.Nf3 Ngf6 6.Nc3 Nc5 7.d3 e5 8.Be2 Be7 9.0–0=; 5.Be2 Ngf6 (5...e5 6.Nf3 Ngf6 7.Nc3 Be7 8.d4 0–0 9.0–0+=) 6.d3 e5 7.Nf3 Be7 8.0–0 0–0 9.Nc3=) 5...Ngf6 (5...e5 6.Nf3 ed4 7.Nd4 Nc5 8.Nc3 Qh4 9.g3+=) 6.Bd3 e5 7.Nf3 ed4 8.Nd4 Nc5 9.Nc3 +=.

4.e4 e5 5.Be2 (5.Nf3 Nf6 (5...Be7 6.Nc3 Nf6 7.Be2 Nbd7 8.d4 0–0 9.0–0+=) 6.Nc3 Be7 7.Be2 Nbd7 8.d4 0–0 9.0–0+=; 5.Nc3 Nf6 (5...Be7 6.Nf3 Nf6 7.Be2 Nbd7 8.d4 0–0 9.0–0+=) 6.Nf3 Be7 7.Be2 Nbd7 8.d4 ed4 9.Qd4=; 5.d4 Nf6 (5...ed4 6.Nf3 Be7 7.Nd4 Bf6 8.Be2 Ne7 9.0–0+=) 6.de5 de5 7.Qd8 Kd8 8.Nc3 Bb4 9.Bd2=) 5...g6 (5...Nf6 6.Nc3 Nbd7 7.Nf3 Be7 8.d4 0–0 9.0–0+=; 5...Be7 6.Nf3 Nf6 7.Nc3 Nbd7 8.d4 0–0 9.0–0+=) 6.Nf3 h5 (6...Nf6 7.Nc3 Bg7 8.0–0 0–0 9.d3+=) 7.d3 (7.0–0 g5 8.d4 g4 9.Ne1+=) 7...Qe7 (7...Bh6 8.Nbd2 Nf6 9.0–0+=) 8.Ba3 (8.Nc3 Nf6+/– (8...Bh6 9.Nd5+/–) 9.Bg5+/–) 8...Nh6 (8...Nf6 9.0–0+=) 9.h3 (9.Nc3+/–) 9...f5 10.Nc3 Be6 11.ef5 (11.Bc1 Bg7+/–) 11...Nf5+= 12.Ne5 (better is 12.Bb2+=) 12...Qh7?? (better is 12...Qf6–/+) 13.Nc6 (13.Bf3!? Ra7 14.Nc6 Nc6 15.Bc6 Bd7 16.0–0+–) 13...Nc6+/– 14.bc6 Nd4 15.Bf3 Nf3 (15...Qf7 16.Be4+=) 16.Qf3+/– (16.gf3?! Bg7 17.Bb2 0–0+=) 16...Qf7 17.Qf7 Bf7 18.Nb5 0–0–0 19.0–0 Bg7 20.Rae1 Rde8?? (20...Rhe8 21.Bc1+/–) 21.Rd1?? (21.Bd6 cd6 22.Nd6 Kb8 A) 23.Ne8?! Be8 24.Re6 Bc3+–; B) 23.Re8 Be8 24.c5 Bc6–/+ (worse is 24...bc5 25.Rb1 Kc7 26.Ne8 Re8 27.Rb7 Kc6 28.Rg7+=); C) 23.Nf7+–) 21...Re2 (21...Re7 22.Rb1+=) 22.Rfe1 Ra2?? (better is 22...Rhe8 23.Re2 Re2 24.Bd6 cd6 25.Nd6 Kc7 26.Nf7 Bd4+=) 23.Re7+– Rf8 (23...Be8 24.Rc7 Kd8 25.Bd6 Bf8+–) 24.Rc7 Kd8 25.Ra7 (25.Rd7 Kc8 26.Bd6 Rf2 27.Na7) 25...Be6+– 26.Ra8 (better is 26.Nd6 Rf7 27.Nf7 Bf7 28.Be7 Ke8+–) 26...Ke7 27.Bd6 Kf7 28.Bf8 Bf8 29.c7 Bg7 (29...Bf5 30.c8Q Bc8 31.Rc8+–) 30.c8Q Bc8 31.Rc8 Ra1 (31...Rc2 32.Rc6+–) 32.Rc7 Kg8 (32...Kf8 33.Ra1 Ba1 34.Rb7+–) 33.Rg7! (33.Rg7 Kg7 34.Ra1+–) 1–0. RisingFast – 2buddies, ChessWorld.net, 2016.

4.e4 Nf6 5.Nc3 (5.d3 e5 (5...Nbd7 6.Nf3 e5 7.Nc3 Be7 8.Be2 0–0 9.0–0=) 6.Nf3 Be7 7.Be2 Nbd7 8.0–0 0–0 9.Nc3=; 5.f3 e5 (5...Nbd7 6.Kf2 e5 7.d4 Be7 8.Bd3 0–0 9.Ne2=) 6.d4 ed4 7.Qd4 Be7 8.Bd3 Nfd7 9.Qd5=) 5...e5 6.Nf3 Be7 7.Be2 Nbd7 8.d4 ed4 9.Qd4 +=.

3.c4 Nf6

4.Bb2 d6 5.Nf3 e5 6.g3 c6 7.a4 cb5 8.cb5 Be6 9.Bg2 Nbd7 10.0–0 Be7 11.Nc3 d5 12.Ng5 0–0 13.d3 h6 14.Ne6 fe6 15.Bh3 Nc5 16.e3 Qd6 17.Ba3 d4 18.ed4 Qd4 19.Be6?? (19.Ne2 Qd6 20.d4 ed4 21.Nd4+/–) 19...Ne6–/+ 20.Be7 Rf7 21.Bf6 Rf6 22.Ne4 Rf5 23.Qb3 Re8 24.Rac1 Kh7 25.Qc4 Rf3 26.Qd4 ed4 27.Rfd1+/– Ng5 28.Ng5 hg5 29.Rc6 Re2= 30.Kg2 Rff2 31.Kh3 Rh2 32.Kg4 Rh6 33.Rc4 Rd6 34.Kg5 Re5 35.Kf4 Red5 36.Ke4 Kg6 37.Rdc1 Kf6 38.Rc6 Re5 39.Kf4 Rf5 40.Kg4 Rg5 41.Kh4 Rgd5 42.g4 Ke6 43.Kg3 Re5 44.Rd6 Kd6 45.Kf2 Rc5= 46.Ra1 Rc3 47.Ke2 Kc5 48.Kd2? Kb4–+ 49.Re1 Rc7 50.Re6 Kc5?? 51.Rg6 Kb4 52.Rb6 Ka4 53.Rd6 Kb5 54.Rd4 a4 55.Rf4 a3 56.Rf1 Kb4 57.Rb1 Ka4 58.d4? a2–+ 59.Ra1 Kb3 60.d5 Kb2 (61.Ra2 Ka2–+) 0–1. hal1958 – taroak, playchess.de, 2004.

4.Nf3 d6 5.Nc3 e5 6.d4 Nbd7 7.e4 Be7 8.Bd3 Bb7 (8...0–0 9.0–0+=) 9.0–0 0–0 10.Bb2 ed4 11.Nd5 Nd5 12.cd5 Ne5 13.Nd4 Nd3 14.Qd3 Bf6 15.Rac1 Re8 16.Bc3 Re7 (16...Be5 17.f4 Bf6 18.Nf5+/–) 17.Nc6 Bc6 18.Bf6 gf6 19.Rc6+– Qe8 20.Qg3 Kh8 21.Qf3 Re4 22.Qf6 Kg8 23.Rc7 Rd8 24.Rf7!! Qf7 25.Qd8 Re8 26.Qd6 Qb7 27.Qc6 Re7 28.d6 Rd7 29.Rc1 Kf7 30.Qb7 Rb7 31.Rc7 1–0. orane (2015) – ReynaldoMiranda (1695), Live Game Caissa's Web, 2004.

3.d3 Bb7

4.c4 e6 5.Bb2 Nf6 6.e4 d6 7.Nf3 e5 8.Be2 Be7 9.0–0 0–0 10.Nc3 Nbd7 11.Ne1 Nc5 12.f4 ef4 13.Rf4+= Ne6 14.Rf1 Nd7 15.Nd5+/– Nec5 16.Qc2 Ne5? 17.d4+– Ne4 18.Qe4 c6 19.bc6 Bc6 20.de5 de5 21.Ne7 Qe7 22.Qc6 Rac8 23.Qe4 1–0. Fredek (2090) – Guest504764, Freundschaftspartie, 5m + 0s, 2005.

4.e4 d6 5.Bb2 Nd7 6.Nf3 e5 7.g3 Nh6 8.Bh3 Be7 9.0–0 0–0 10.Bc1+= f5 11.Bh6+/– fe4 12.de4 gh6= 13.Nc3 Nc5 14.Qe2 Qe8 15.Nd2 Kh8 16.Bf5 h5 17.h3 Rg8 18.Kh2 Qf7 19.Rg1 Bg5 20.Nc4 Bc8 21.Bc8= Rac8 22.Nd5 Rcf8–/+ 23.Raf1 h4 24.g4 Ne6 25.f3 Bf4 26.Kh1 Bg3 27.c3 Ng5 28.Kg2=+ Ne6 29.Nce3 Nf4 30.Nf4 Bf4 31.Nf5 d5 32.Kh1 de4 33.fe4+/– Qe8 34.Rd1 h5 35.gh5 Rg3 36.Ng3 (36...hg3 37.Qg4+–) 1–0. Fredek (2090) – Guest365873, Freundschaftspartie, 5m + 0s, 2005.

4.e4 e6 =.

3.d4 d5

4.a4 e6 5.f4 (5.e3 Bd6=) 5...Nf6 (5...Nd7 6.Nf3=+) 6.e3 Ne4 (better 6...c5=+) 7.Ke2? (7.Nf3!?=+) 7...e5! 8.h3?? (8.de5 Bg4 Skewer; 8.fe5 Bg4 Skewer) 8...Ng3–+ 9.Ke1 (9.Kd2 Nh1 10.Qe1 Bb4 11.c3 Be7–+) 9...Nh1 10.Qf3 (10.Qh5 Ng3 11.Qf3 ef4–+) 10...e4 11.Qd1 (11.Qe2 Qh4 12.Kd2 Ng3–+) 11...Ng3 (better 11...Qh4 12.Kd2 Qf2 13.Be2–+) 12.Kd2 (12.Ne2 Qh4 13.Kf2 Ne2 14.Ke2 Be6–+) 12...Nf1 (12...Nd7 13.Ne2 Nf5 14.g4–+) 13.Qf1 c6 (13...Bb4 14.c3 Be7 15.Ne2–+) 14.g3 (14.Ba3 c5–+) 14...c5 (14...Bb4 15.c3 Bd6 16.Ba3–+) 15.c3 (15.Ne2 Nd7–+) 15...cd4 (15...Nd7 16.Ke2–+) 16.ed4 (16.cd4 Bb4 17.Nc3 0–0–+) 16...h6 (16...Be7 17.Ke1–+) 17.Ke3 Bd6 (17...Be7 18.Kf2–+) 18.h4 (18.Ba3 0–0–+) 18...Bg4 (18...Nd7 19.Kf2–+) 19.Nd2 (19.Ba3 0–0 20.Kf2 Re8–+) 19...0–0 (19...Nd7 20.Kf2 g5 21.Ne4 de4 22.Qe1 gh4 23.Qe4 Kf8 24.Qh1 hg3 25.Kg3–+) 20.Qg2 (20.Kf2 Qc8 21.Bb2 Re8–+) 20...Qf6 (20...Qc7 21.Bb2 Re8 22.Nf1–+) 21.Ba3 (21.Kf2 Rc8 22.Bb2 Qe6–+) 21...Nd7 (better 21...Ba3 22.Ra3 Qe7 23.Rb3–+) 22.h5 (22.Bd6 Qd6 23.Nf1 Nc5–+) 22...Rac8 (better 22...Ba3 23.Ra3 Qd6 24.Ra1–+) 23.Bb2 Bh5 (23...Nc5 24.Qh2–+) 24.Nh3 (24.Nf1 Qg6 25.Kf2 Nf6–+) 24...Qg6 25.Rf1 Nf6 26.Kf2 Ng4 (better 26...e3 27.Kg1 ed2 28.Qd2–+) 27.Kg1 Ne3 28.Qf2 0–1. patrick317 – tara29, gameknot.com, 2017.

4.c3 Bf5 5.a4 h6 (5...Nf6 6.Bf4=) 6.Nd2 c6 7.f3 c5 (7...Nf6 8.bc6 Nc6 9.e4 de4 10.fe4 Be4 11.Ne4 Ne4 12.Qf3=) 8.g4 (better 8.e4!? Bg6 9.dc5 bc5 10.ed5 Qd5 11.Bc4+=) 8...Bg6 9.e3 e5 10.de5 Qc8?? (better 10...Qh4!? 11.Ke2 Nd7=+) 11.Bh3 (11.f4 Qd8 12.Ngf3 h5+–) 11...c4 (11...Be7+=) 12.g5 (12.f4 Bd3+–) 12...Qc5 (12...Qd8 13.Nf1=) 13.Kf2 (13.Nf1 A) worse 13...hg5 14.Ba3 Qc7 15.Qd5 Ba3 A1) 16.Qa8 Bb2 17.Rd1 Bc3 18.Kf2 Bd3+= (18...Qe5 19.Rd5+–); A2) 16.Ra3+–; B) 13...Bd3+=) 13...Nd7 (13...hg5 14.Ba3 Qc7 15.Bf8 Kf8 16.f4=+) 14.Ba3 (14.Bd7 Kd7 15.Ne4 Be4 16.fe4 Ke8+=) 14...Qc8 (14...Qc7 15.gh6 Nh6 (15...Qe5?? 16.Bd7 Kd7 17.Nc4+–) 16.Bf8 Nf8=) 15.Bb2 (better 15.Bf8!? Kf8 16.Ne2 hg5 17.Bd7 Qd7 18.Nc4+–) 15...Ne7 (15...Qd8 16.Bd7 Qd7 17.gh6 Nh6 18.Ne2–/+) 16.f4 (16.gh6 Rh6 17.Ba3 Nf5 18.Bf8 Kf8=) 16...Nf5 17.Ba3 (17.gh6 Rh6 18.Bf5 Bf5 19.Ba3–/+) 17...Be7 (17...Ba3 18.Ra3 Qc5 19.Bf5 Bf5–/+ (19...Qa3 20.Ne4 Bf5 21.Nd6 Kd8 22.Qd5+=)) 18.Be7 Ke7 19.gh6 Kf8? (better 19...Rh6 20.Nf1 Qc5+=) 20.hg7 Kg7 21.Bg2 (21.Bf5 Bf5 22.Qf3 Nc5 23.Qd5 Rd8 24.Qg2 Kh8+–) 21...Qc5 (better 21...Nc5 22.Ngf3 Nd3 23.Ke2 Kf8+–) 22.Qe1?? (22.Nf1 Rad8+–) 22...Qe7?? (better 22...Rh4 23.Nh3 Rah8=) 23.Ndf3 (better 23.Bd5!? Nc5 24.Bc4 Qh4 25.Ke2 Qe1 26.Re1 Ng3 27.hg3 Rh1 28.Ngf3 Re1 29.Ke1 Na4 30.Bd5+–) 23...Nc5+– 24.Ke2 Ne4 25.Kd1 (better 25.Nd4+–) 25...Nc3?? (better 25...Nh4 26.Nh4 Qh4+=) 26.Kc1 (better 26.Qc3 Qb4 27.Ra3+–) 26...Qc5?? (better 26...Qb4–+) 27.Qc3+– Ne3 28.Qd2?? (28.e6 f6 29.Ra2 Qb4 30.Qb4 ab4+–) 28...Ng2?? (28...c3 29.Qf2 Ng2 30.Qc5 bc5=) 29.Nd4?? (better 29.Qg2 Qe3 30.Qd2+–) 29...Qc8?? (better 29...c3 30.Qf2 Ne1 31.Ne6 fe6 32.Qe1 Qd4–+) 30.Qg2+– Rh4 31.Nge2 Kh6 (31...Qh3 32.Qd5 Qe3 33.Kd1 c3+–) 32.Qg5 (32.Qg5 Kg7 33.Qh4+–) 1–0. patrick317 – warrior23, gameknot.com, 2018.

4.c4 Nf6 5.cd5 e6=.

3.e3 Bb7

4.Bb2 d5 5.Nf3 c6 6.a4 (6.Nc3 Nf6+=) 6...e6 (6...Nf6 7.Bd3+=) 7.c4 dc4 (7...Nf6 8.Nc3+=) 8.Bc4 Qd7 (8...Nf6!?+=) 9.0–0 f6?? (better 9...Nf6+–) 10.Qb3+– Bc8 (10...Nh6 11.Be6 Qd8 12.Nc3+–) 11.Nd4 cb5 (11...Qd6+–) 12.Bb5 Nc6 (12...e5 13.Bd7 Nd7 14.Ne6+–) 13.Bc6 1–0. GuestYZYP – XHL, freechess.org, 2020.

4.Bb2 f6 5.a4 g6 6.Nf3 e5 7.h4 h5 (7...Ne7 8.h5 g5 9.d4+–) 8.c4 Bb4 9.Qc2 Ne7 10.Nc3 c6 (10...Kf7!?+–) 11.Bd3 d5 (11...Kf7!?+–) 12.bc6+– Bc6 (12...Nbc6 13.cd5 Nd5 14.Bg6 Kf8 15.Ng5 fg5 16.Qf5 Qf6 17.Nd5 Qf5 18.Bf5+–) 13.Bg6 Ng6 (13...Kf8 14.cd5 Nd5 15.0–0 Bc3 16.dc3+–) 14.Qg6 Kf8 15.Nd5 Bd5 (15...Ra7 16.0–0 Rg7 17.Qf5+–) 16.cd5 Ra7 (16...Rg8 17.Qh6 Rg7 18.Ne5+–) 17.Rc1 Rg7 (17...Nd7 18.Rc6 Rg8+–) 18.Qf5 Nd7 19.Ng5 Nc5 (19...Re7 20.f4 Qe8 21.fe5 Nc5+–) 20.Rc5! Rg5 (20...Bc5 21.Ne6 Double attack (21.d4 Decoy); 20...bc5 21.Ne6 Double attack) 21.hg5 Bc5 22.Be5 Be7 23.d6 Bd6 24.Bf6 Ke8 25.Bd8 (25.Bd8 Kd8 26.Qf6 Kc7 27.Qh8 b5 28.g6 Ba3 29.Qc3 Kd6 30.Qa3 Kd7 31.g7 Kc6 32.Qc3 Kd5 33.g8Q Kd6 34.Qf7 ba4 35.Qcc7) 1–0. Pierre – Ramron, internet, 2019.

4.Bb2 Nf6 (--> 3.Bb2 Bb7 4.e3 Nf6).

4.c4 d5 5.cd5 Qd5 (5...Nf6 6.d4=) 6.Nc3+= Qd7 7.Bb2 Nf6 8.Nf3 e6 9.Be2 (9.Ne5 Qd8+=) 9...Be7 (9...Bd6 10.0–0=) 10.0–0 (10.Ne5 Qd6 11.Nc4 Qd7+=) 10...0–0= 11.a4 (11.Ne5 Qd6 12.Nc4 Qd7+=) 11...c5 12.Ne5 Qc7 13.f4 Bd6 (13...Nbd7 14.Bf3=) 14.Nc4 Nbd7 15.Bf3 Be7 16.Qe2 Bf3 17.Rf3 Rad8 18.Rh3 Rfe8 19.g4 (19.d3 Nd5=) 19...h6 20.g5 hg5 21.fg5 Nh7 22.Qh5 Ndf8 23.Ne4 Rd5 24.Rg3 Qd8 25.Rf1 Rf5 26.Rf5 ef5 27.Ne5 Qd5 28.Nf6 Bf6=+ 29.gf6 Nf6 30.Qh6 g6?? 31.Rh3 N8h7 32.Nf3 (32...Qd6 33.Bf6 Qf6 34.Qh7 Kf8 35.d4+–) 1–0. Markus – Wartig,Wolfgang, corr SOK–89–41, 1989.

4.c4 e5 5.Bb2 d6 (5...e4 6.Nc3=) 6.d4 c6 (better is 6...ed4!? 7.ed4 d5=) 7.de5+/– cb5 8.cb5 Nd7 (8...de5!? 9.Qd8 Kd8 10.Be5 Nd7+/–) 9.ed6+– Nc5 10.Nf3 Nf6 11.Be2 (11.Be5 Nfe4 12.Be2 f6+/–) 11...Bd6+= 12.Na3 Nce4 13.Nc4 Bb4 14.Kf1 Qe7 (14...Bd5 15.Bd4 Ng4 16.Bb6+/– (< 16.Nb6 Ngf2 17.Qc2 Nh1–/+)) 15.Nb6 Nf2? (better is 15...Rd8 16.Nd4 Nc3+/–) 16.Bf6+– Nd1 17.Be7 Ne3 18.Kf2 Ke7 19.Na8 (19.Ke3?! Bc5 20.Kf4 Bb6+=) 19...Nd5 20.Rac1 Ba8 21.Nd4 Bd2 22.Nc6 Kf6 23.Rcd1 (23...Bc6 24.Rd2+– (24.bc6 Be3 25.Kf3 Ke5+–)) 1–0. Heinola – Paavilainen, Turku, 1988.

4.c4 e5 5.d4 Bb4 6.Bd2 ed4 7.ed4 =.

4.Bc4 Bg2 5.Qh5 (5.Bd5 Bd5 6.Nf3 d6–+) 5...e6 6.Bb2 (6.Ba3 Nf6 7.Qg5 Bh1 8.Bf8 Rf8–+) 6...Bh1 7.f3 (7.Be2 Nf6 8.Qh4 Bb7–+) 7...d5 8.Bd3 Nf6 9.Qe5 (9.Qh3 c5–+) 9...Qd6 (9...Rg8 10.Qg5–+) 10.Qd6 (10.f4 Qe5 11.fe5 Ne4–+) 10...cd6 (10...Bd6 11.f4–+) 11.Ba3 (11.Kf2 Nbd7 12.Nh3 e5–+) 11...Be7 12.Nc3 e5 (13.Nce2 e4–+; 12...Nbd7!? 13.Nce2 Ne5 14.Kf2–+) 0–1. solidsteel – crenatus, Live Game Caissa's Web, 2005.

4.Nf3 c5 5.bc6 Nc6= 6.d4 Nf6 7.Ba3 g6 8.Nbd2 (8.c4 e6=) 8...e6 (8...Qc7 9.c3=) 9.Bf8= Kf8 10.c4 Kg7 11.Rb1 d6 12.Qb3 Qe7 13.Be2 e5 14.0–0 Rhb8 15.Qc3 (15.Qb6? Nb4 16.de5 de5–+) 15...Qc7 16.a3 Re8 17.Qb2 ed4 18.Nd4 Rab8 19.Nb5 Qe7 20.Rfd1 Red8 21.Nf1 Attacking the isolated pawn on d6 21...h5 22.f3 h4 23.e4 Ne5 24.Qd2 Kg8 25.Nd4 Ba6 Attacks the isolani on c4 (25...h3 26.gh3 Bc8 27.Ng3+–) 26.Qg5 d5 (26...Bc4? 27.Bc4 (27.Qh4?! Be2 28.Ne2 Nc4=) 27...Nc4 28.Nc6+–) 27.Nf5 Qc5 28.N1e3 Bc4 29.Qf6 gf5 30.Qg5 Kf8 31.Rbc1 b5 (31...fe4!? 32.fe4 h3+–) 32.Kh1 fe4 (32...Qa3? 33.Nf5 Ng6 34.Bc4 bc4 35.ed5+–) 33.fe4 Qe7 34.Qh6 Kg8 35.Nf5 Qf8 36.Qg5 Ng6 37.Bh5 Rb6 (37...Qa3 38.Bg6 Qf8 39.Nh6 Kh8 40.Nf7 Kg8 41.Qh5+–; 37...de4 38.Bg6 fg6 39.Qg6 Kh8 40.Qh5 Kg8 41.Qg5 Kh8 42.Qh4 Kg8 43.Ne7 Kg7 44.Qg4 Kh7 45.Qe4 Kg7 46.Rf1 Bf1 47.Rc7+–) 38.ed5 h3 (38...Rd5?? 39.Rd5 Bd5 40.Bg6 fg6 41.Rc8 Qc8 42.Ne7 Kf8 43.Nc8+–; 38...Bd5 39.Bg6 Rg6 40.Ne7 Qe7 41.Qe7 Bg2 42.Kg1 Rd1 43.Rd1 Bf3 44.Kf2 Bd1 45.Qd8 Kh7 46.Qd1 Rf6 47.Ke3+–) 39.Bf3 Rd7 40.Rc3 Qd8 (40...Rb8 41.gh3 Qd8 42.Qh5+–) 41.Qg4 hg2 42.Bg2 Kf8 (42...Qf6 43.Re3 Rd8 44.Rde1+–) 43.Qh5 Qf6 (43...Bd5?? 44.Qh6 Ke8 45.Bd5 Rd5 46.Re3 Re6 47.Re6 fe6 48.Qg6 Kd7 49.Rd5 ed5 50.Qd6 Kc8 51.Ne7 Qe7 52.Qe7+–) 44.Re1 Rb8 (44...Qc3?? 45.Qh6 Kg8 46.Re8 Nf8 47.Rf8) 45.Qh6 Kg8 46.Rce3 Rf8 47.Qh5 (47.Ne7 Re7 48.Re7 b4+–) 47...Rd5 (47...b4+–) 48.Nh6 Kh7 49.Bd5 Qh4 50.Qf5 Kh6 (50...Bd5 51.Qd5 Kh6 52.Qb5+–) 51.Bc4 Qc4 52.Rh3 Kg7 53.Rg1 Qc7 54.Rf3 Qe7 55.Qb5 (55.Qb5 f5 56.Qa5+–) 1–0. pman3660 (2245) – marekt (2125), gameknot.com, 2015.

4.Nf3 e6 5.c4 d5 (5...Nf6 6.Be2=) 6.Bb2 Nf6 7.Nc3 Bb4 8.cd5 Nd5 (8...ed5 9.Be2=) 9.Nd5 Bd5 10.Be2 (10.Bg7!? Rg8 11.Bb2+/–) 10...0–0= 11.0–0 Nd7 (11...c6 12.a3 Bd6 13.Qa4=) 12.d4 (12.Qc2 Rc8 13.e4 Ba8=) 12...Nf6 (12...c6=) 13.Rc1 (13.Qc2 Be4 14.Bd3 Qd5=) 13...Bd6 (13...Ba2 14.Qa4 Bd5 15.Ne5+=) 14.Ne5 (14.Qa4=) 14...Ne4 (better is 14...Ba2 15.Qa4 Bd5+=) 15.f3+/– Ng5 16.e4 Bb7 17.Nc6 Bc6 18.Rc6 Qe7 (18...f6 19.Qc2 Qd7 20.f4+–) 19.Qb3 (better is 19.e5!? Ba3 20.Ba3 Qa3 21.Qc1+– (21.Rc7?! Qe3 22.Kh1 Rad8+/–)) 19...a4 (19...e5 20.de5 Bc5 21.Kh1+/–) 20.Qc2 a3 21.Bc1+– h6 22.Qc4 Ra5? 23.Bd2+– Ra7 24.e5 1–0. Fournier,Frederic (1630) – Janio (1755), Active, 2006.

4.Nf3 e6 5.Be2 Nf6 6.Bb2 Be7 7.a3 c6 8.c4 cb5 9.cb5 0–0 10.0–0 d6 11.d4 Nbd7 12.Nbd2 Nd5 13.Rc1 N7f6 14.Qb3 a4 15.Qa2 Qd7 16.Qb1 h6 17.Bd3 Rfc8 18.Rc8 (18.Nc4 A) 18...Qb5? 19.Nd6 Rc1 20.Rc1+– (20.Nb5?! Rb1 21.Rb1 Rc8=; worse is 20.Qc1 Qd3 21.Nb7 Rb8–/+); B) 18...Bd8+=) 18...Rc8= 19.Rc1 Nc7 20.Qc2 Nb5 21.Qa4 Rc1 22.Bc1 Bc6 23.Qb3 Nd5 24.a4 Nbc3 25.e4+/– Ba4 26.Qb2?? Nd1–/+ 27.Qa2 N5c3 28.Qc4?? b5 29.Qb4 d5 30.Qa5 b4 31.Qa8 Bf8 32.Ne5 Qe8 33.Qe8 Be8 34.ed5 ed5 35.Bc2 Ba4 36.Ba4 Na4 37.Nb3 Nac3 38.Bd2 Bd6 39.Nd3 Ne2 40.Kf1–/+ Ndc3 41.Be3 h5 42.g3 h4 43.Ke1 hg3 44.hg3 Be7 0–1. Fournier,Frederic (1820) – antonetegalvez (1865), Active, 2011.

4.Nf3 Bf3 5.Qf3 Ra7 6.Bb2 d6 7.Be2 Nf6 (7...e6 8.0–0+–) 8.0–0 (8.Bf6 gf6 9.d4 Bg7+–) 8...Nbd7 9.Qc6 (9.d4 e6+–) 9...e6 10.c4 Be7 11.d4 Ne4?? (better 11...0–0+–) 12.Qe4+– Bf6 (12...Nf6 13.Qf3+–) 13.Nc3 0–0 14.Qc2 d5 (14...Re8 15.Rfe1+–) 15.cd5 ed5 (15...e5 16.de5 Be5 17.Bd3+–) 16.Nd5 Qe7 (16...Be7+–) 17.Ne7 Be7 18.Qe4 Bd6 19.Qf5 Nf6 20.e4 Bb4 21.Bc4 c5 22.bc6 Rc7 23.d5 Re8 24.e5 Nd5 25.Bd5 Kh8 26.Be4 g6 27.Qf6 Kg8 28.e6! fe6 (28...Re6 29.Qg7; 28...fe6 29.Qh8) 29.Qh8 Kf7 30.Qh7 (30.Qh7 Kf8 31.Qh8 Ke7 32.Qf6 Kd6 33.Qe5 Ke7 34.Qc7 Kf8 35.Qg7; 30.Qg7) 1–0. DEFFM – GuestFTDF, freechess.org, 2018.

4.Nf3 Nf6 5.Bb2 (--> 3.Bb2 Bb7 4.e3 Nf6 5.Nf3).

4.Nf3 Nf6 5.g3 d6 6.Bg2 e5 7.c4 Be7 8.Nc3 Nbd7 9.d4 ed4 10.ed4 0–0 11.0–0 Rb8 12.Qc2 h6 13.Be3 Re8 14.Qd2 Ne4 15.Ne4 Be4 16.Bh6 (better is 16.Rfd1=) 16...gh6–+ 17.Qh6 Bf3 (17...d5!? 18.cd5 Bf8–/+) 18.Bf3=+ Bg5 19.Qh5 Qf6 (better is 19...Bf6 20.Bc6 Bg7=) 20.Be4?? (better is 20.Bc6 Nf8 21.Be8 Re8 22.Rfe1 Re1 23.Re1+=) 20...Qg7 (better is 20...Re4 21.f4 Qd4 22.Kh1–+) 21.Qg4?? (better is 21.Bc6 Nf6 22.Qf3=+) 21...Nf6–+ 22.Qf5 Ne4 23.f4 (23.Rae1 Nd2 24.Re8 Re8–+) 23...Bh6 24.Rfe1 (24.Kh1 Qd4 25.Qd5 Qd5 26.cd5 Bg7–+) 24...Ng3 25.hg3 Qg3 26.Kf1 Re1 (26...Qf3 27.Kg1 Bf4 28.Qd5 Be3 29.Kh2–+) 27.Re1 Qf4 28.Qf4 Bf4 29.Kf2 Kf8 30.Kf3 Bg5 31.Rh1 Ke7 32.Kg4 f6 33.d5 Kf7 34.Rh7 Kg6 35.Rc7 Re8 36.Rc6 Re4 37.Kf3 Rf4 38.Kg2 Re4 39.Kf3 Rf4 40.Kg2 Re4 41.Kh3?? Re3 42.Kg4 Re4 43.Kf3= ½–½. slavisa11 – DKPs, Live Game Caissa's Web, 2004.

4.Nf3 g6 5.Bb2 Nf6 6.d4 d6 7.d5 (7.Nc3 Nbd7=) 7...Bg7= 8.Bc4 Nbd7 9.0–0 Nc5 10.Nc3 e6 11.Rb1 0–0 12.h3 Qe7 13.Re1 Rae8 14.a3 Qd7 15.Qd2 Nfe4 16.Ne4 Ne4 17.Qd3 Bb2 18.Rb2 Qd8 19.Qd4 Nc5 (19...ed5 20.Bd5 Bd5 21.Qd5=+) 20.Rbb1 (20.e4 e5 21.Qd2 f5–/+) 20...e5=+ 21.Qc3 f5 22.Ba2 g5 23.Qc4 Rf7 24.Rbd1 Ref8 (24...Rg7=+) 25.Re2 (better 25.Nd2!?=) 25...Rg7–/+ Black prepares the advance g4 26.Nd2 (26.Rb1 g4 27.hg4 fg4–/+) 26...g4–+ 27.hg4 Rg4 28.Qc3 Qh4 29.g3?? (better 29.f3 Rg7 30.Qc4–+) 29...Rf6–+ 30.e4 (30.Kg2 Rh6 31.e4 fe4 32.Re4 Qh3 33.Kf3 Rg3 34.Ke2 Rc3 35.Rg1 Rg6 36.Rg6 hg6 37.Kd1 Ne4 38.Ne4 Ra3 39.Bc4 Qg4 40.Be2 Qe4 41.Bh5 Ra1 42.Kd2 Qd5 43.Kc3 Rb1 44.Bg6 Qd4) 30…f4 0–1. decu40 (1935) – yzerman123 (2335), gameknot.com, 2015.

4.Nf3 h6 5.c4 c5 6.Bb2 e6 7.Be2 d6 8.0–0 Nd7 9.d4 Ne7 10.Nbd2 Qc7 11.Qc2 (11.Rc1 e5+–) 11...Ng6 (11...cd4 12.ed4 d5 13.Rac1 dc4 14.Nc4+=) 12.Bd3+– e5? (better 12...Ne7+–) 13.Bg6+– fg6 14.Qg6 Kd8 15.de5 de5 16.Rfd1 Kc8 (16...Qd6 17.Qg3 Qe6 18.Ne5 Ne5 19.Be5+–) 17.Qe6 (17.Ne4 Be7 18.Ne5 Ne5 19.Qg7 Nf3 20.gf3 Be4 21.Qh8 Kb7+–) 17...Bd6? (17...Qd6 18.Qh3 Kc7+–) 18.Ne5 (better 18.Nf1 e4 19.Nh4 (19.Qd6?! ef3 20.g3 Qd6 21.Rd6 Rh7+–; worse 19.Rd6 ef3 20.Be5 fg2+–) 19...Bh2 20.Nh2+–) 18...Rd8?? (better 18...Be5 19.Be5 Qe5–/+) 19.Nd7 (better 19.Ndf3 Kb8 20.Rd6+–) 19...Bh2 (19...Qd7 20.Qg6+–) 20.Kh1 Rd7 21.Ne4 Be4 22.Qe4 Rd1 23.Rd1 Ra7 (23...Kb8 24.Qe6 Ka7 25.Bg7+–) 24.Qe8 Kb7 25.Rd7 Bd6 26.Rc7 Bc7 27.Bg7 h5 28.Qd7 Ra8 (28...Kb8 29.Be5! Be5 30.Qe8 Kb7 31.Qe5 Kc8 32.Qe8 Kc7 33.Qc6 Kb8 34.Qb6 Rb7 35.Qd6 Ka7 36.Qc5 Kb8+–) 29.Be5 Rc8 30.Qc6 Kb8 31.Qb6 Ka8 1–0. GuestXZJW – GuestSYWM, freechess.org, 2017.

4.Bb2 a4

5.a3 d6 6.c4 Nd7 7.Nf3 Nc5 8.d4 Nb3 9.Ra2 e6 10.Nc3 c6 11.Na4 Ra4 12.Qb3 Ra8 13.bc6 Bc6 14.Qb6 Qb6 15.Bd3 Qb3 16.Bb1 Qc4 17.Nd2 Qb5 18.Bc2 Bg2 19.Rg1 Bd5 20.a4 Qb4 21.Ba3 Qc3 22.Bb2 Qc2 0–1. Adjailton (1825) – marce10 (1785), lichess.org, 2019.

5.a3 e6 6.Nf3 Bf3 7.Qf3+– d5 8.c4 Ra7 9.cd5 Qd5 10.Nc3 (10.Qd5 ed5 11.Be2 Nd7+–) 10...Qf3+= 11.gf3 Nd7 12.d4 Ndf6 13.e4 Ne7 14.Bc1 (better 14.Bd3+–) 14...c6? (14...Ng6!?+=) 15.Be3 (15.bc6!? Ra5 16.c7 Kd7+–) 15...cb5 16.Nb5 Rb7?? (better 16...Rd7+–) 17.Nd6+– Kd7 18.Nb7 Nc6 (18...Kc7 19.Ba6 Ng6 20.h4+–) 19.e5 (better 19.Bb5!? Kc7 20.Bc6 Kc6 21.Nd8 Kd7 22.Nf7 Rg8+–) 19...Nd5 (19...Kc7 20.ef6 Kb7 21.Bb5+–) 20.Bb5 Kc7 (20...Be7 21.Rg1 Nc3 22.Bc6 Kc6 23.Nd6 Bd6 24.Rc1+–) 21.Bc6 Kc6 22.Nd6! Bd6 23.ed6 Kd6 24.0–0 (24.Rc1 h6+–) 24...f5 (24...Rc8 25.Rfc1 Rc3 26.Kg2+–) 25.f4 h6 (25...Rc8 26.Rfc1 Rc3 27.Rc3 Nc3 28.Bd2+–) 26.h4 g5 (26...Rc8 27.Rfc1 Rc3 28.Rc3 Nc3 29.Bd2+–) 27.hg5 hg5 28.fg5 Rg8 (28...f4 29.Bd2 f3 30.Rac1+–) 29.Rab1 (29.Bd2!? f4 30.Kg2 Rg5 31.Kf3 Rf5+–) 29...f4 30.Bd2 Rg5 31.Kh2 Rh5 (31...e5 32.de5 Re5 33.Rfe1 Rh5 34.Kg2+–) 32.Kg2 Rg5 (32...Rh4 33.Rbd1 Kc6 34.Rfe1+–) 33.Kf3 Rh5 34.Rh1 Rh1 35.Rh1 e5 (35...Nf6+–) 36.Rh6 Ke7 37.de5 b5 (37...Ke8 38.Ke4 Nc7 39.e6+–) 38.Ke4 Nc7 39.Bf4 (39.Rh7 Ke8 40.Rc7 Kd8 41.Ra7 Ke8 42.e6 Kf8 43.Kf5 Kg8 44.Kg6 Kf8 45.Bb4 Ke8 46.Ra8) 39...Ne6 (39...b4 40.ab4 a3 41.Rc6+–) 40.Bd2 Nc5 (40...Kd7+–) 41.Kd5 White prepares the advance e6 41...Nb3 42.Bb4 (42.Bg5 Kf7 43.e6 Kg7 44.e7 Kf7 45.Rh7 Kg6 46.e8Q Kf5 47.Qh5 b4 48.Rf7) 42...Kf7+– 43.Rh7 (43.e6 Kg7 44.Rh3 Kg6 45.e7 Nc1 46.e8Q Kf6 47.Rg3 Nd3 48.Qe6) 43...Kg6 44.Rc7 Na1 45.e6 Kf6 (45...Kf5 46.e7 Kf4 47.e8Q Kf3 48.Qe3 Kg2 49.Rg7 Kf1 50.Qe1) 46.Rf7 (46.e7 Kf7 47.Rc8 Kg7 48.e8Q Nb3 49.Qh8 Kg6 50.Rg8 Kf5 51.Qe5) 46...Kg6 (46...Kg5 47.e7 Kg6 48.e8Q Kh6 49.Qg8 Nc2 50.Rh7) 47.Rf3 Nc2 (47...Nb3 48.e7 Nc1 49.e8Q Kh6 50.Qg8 Nd3 51.Rh3) 48.e7 Nb4 (48...Nd4 49.e8Q Kh6 50.Rg3 Nf3 51.Qg6) 49.ab4 a3 (49...Kh7 50.e8Q Kh6 51.Rg3 a3 52.Qg6) 50.Ra3 (50.e8Q Kh6 51.Rg3 a2 52.Qg6) 50...Kf7 (50...Kg7 51.e8Q Kf6 52.Rg3 Kf5 53.Qe5) 51.Kd6 Ke8 52.Ra8 Kf7 53.e8Q Kf6 54.Qe6 Kg5 (54...Kg7 55.Rg8 Kh7 56.Qg6) 55.Rg8 Kf4 56.Rf8 (56.Qg4) 56...Kg5 57.Qg8 Kh6 58.Rf7 Kh5 59.Rh7 1–0. e4_e5_f4 (1665) – sugla (1680), lichess.org, 2020.

5.a3 h5 6.Nf3+= h4 (6...Nf6 7.Be2+=) 7.h3 g6?? (7...Nf6 8.Be2+–) 8.c4 (better 8.Bh8 e6 9.Be2+–) 8...Nf6+– 9.Be2 Bf3 (9...Bg7!?+–) 10.Bf3+– (10.gf3?! c6+=) 10...Ra5 11.Nc3 c6 12.0–0 cb5 (12...Bg7 13.bc6 dc6 14.Na4+–) 13.cb5 (better 13.Nb5 Nc6 14.Bf6 ef6 15.d4+–) 13...Nc6?? (better 13...Bg7+–) 14.bc6 (14.Bc6?! dc6 15.bc6 Qc8+–) 14...dc6 (14...Bg7 15.Na4 0–0 16.Rc1 dc6 17.Rc6+–) 15.Bc6 Nd7 16.Na4 Bg7 (16...e5+–) 17.Bg7 (17.Bg7 Rh7 18.Bd4+–) 1–0. GuestZBPB – guestvico, freechess.org, 2017.

5.Nf3 e6 6.c4 a3 7.Be5 d6 (7...Nf6 8.Be2=) 8.Bc3 Nf6 9.d4 d5 10.Be2 Bd6 11.0–0 0–0 12.Nbd2 Nbd7 13.Ne5 dc4 14.Bc4 Nd5 15.Bd5 Bd5 16.e4 Bb7 17.Nc6 Bc6 18.bc6 Nb8 19.d5 ed5 (19...Qh4 20.g3 Qg5 21.Qf3=) 20.ed5+= Na6 (20...Re8 21.Re1 Re1 22.Qe1+=) 21.Qg4 f6 22.Qe6 Kh8 23.Ne4 Nc5 24.Nc5 Bc5 25.Rfe1 Re8 26.Qf7 Rf8 27.Qh5 Ra4 28.Qf3 (28.Rad1 b5+=) 28...Bd4 (28...Qd6 29.g3=) 29.Rad1+= Bc3 (29...Be5 30.Qe3+=) 30.Qc3+– Qd6 (30...Ra5 31.Qb4+–) 31.Re6 Qf4 32.d6 cd6 33.Red6 (33.Rdd6?! Rc4 34.Qe1 h6+=) 33...Rc4 (33...Qc4 34.Rc1 Re8 35.f3+– (35.Qc4?! Rc4 36.Rdd1 Rc1 37.Rc1 Kg8+=)) 34.Qa3 h6 35.Qb3 (35.g3 Qf5+–) 35...b5 (35...Rc8 36.Qb1 (36.Qb6?? Qd6 37.Qb3 Qc6–+) 36...f5 37.g3+– (37.Qb6?? Qd6 38.Qb1 Qc6–+)) 36.Qb5 Rc2 37.f3 (37.Qf1 Re8+–) 37...Qe3 38.Kh1 Qf2 39.Rg1 Rc8 40.Qb7 Re8 41.h3 Ree2?? (better 41...Qc5 42.Qf7 Rg8+–) 42.Qc8 Kh7 43.Qf5 Kg8 44.Rd8 Kf7 45.Qh5 g6 46.Qd5 Re6 47.Rd7 Kf8 (47...Kg8 48.Qe6 Kh8 49.Qe8) 48.Qe6 Qg2 1–0. guest620 – guest192, chessclub.com, 2018.

4.Bb2 c5

5.a4 d5 6.Nf3 Nd7 7.Be2 Ngf6 8.c4 dc4 9.0–0 e6 10.Bc4 (10.Na3 Be7=) 10...Be7 11.d4 0–0 12.Nbd2 Nd5 (12...Rc8 13.Rc1=) 13.Qe2 N7f6 (13...Rc8 14.e4 N5f6 15.Rac1=) 14.Rfd1 (14.e4 Nb4+=) 14...Rc8 15.dc5 (15.e4 Nf4 16.Qe3 Bd6+=) 15...Bc5 16.e4 (better is 16.Rac1+=) 16...Nf4–/+ 17.Qe1? (better is 17.Qf1 Ng4 18.Ba3 Bf2 19.Kh1–+) 17...Ng4–+ 18.Bf1?! (18.Qf1 Bf2 19.Kh1–+) 18...Bf2 19.Qf2 Nf2 20.Kf2 Nd3 21.Bd3 Qd3 22.Bd4?! Be4 23.Bb6 Bf3 24.Nf3 Qe4 25.Ne1 Rc2 (better is 25...Rc4–+). Andre,K – Wartig,Wolfgang, corr SOK–90–61, 1990.

5.a4 e6 6.Nf3 d6 7.c4 Nd7 8.Be2 Qc7 9.0–0 Ngf6 10.d4 cd4 11.Nd4 Rc8 12.Nd2 Ne5 The pressure on the backward pawn c4 grows 13.Rc1 Qb8 (13...Ned7 14.Bf3+=) 14.h3 (14.f4 Ned7+=) 14...Be7= 15.N2f3 (15.f4 Ned7=) 15...Nfd7 16.Ba3 Nc5 17.Ne5 de5 18.Nf3 Rd8 19.Qc2 f6 20.Rfd1 Qa8 (20...0–0 21.Bc5 Bc5 22.Nd2=+) 21.Ne1 (21.Rd8 Qd8 22.Nd2 Na4 23.Be7 Ke7=) 21...Be4 22.Qa2 0–0 23.f3 (23.Bf3 Bf3 24.Nf3 Qb7=) 23...Bb7 24.e4 Rd1 (24...Qc8 25.Nd3=+) 25.Rd1= Rd8 26.Nd3 Qc8 27.Qc2 Rd7 28.Nc5 Bc5 29.Bc5 Rd1 30.Qd1 Qc5 31.Kh2 Qc7 32.Qd2 Kf7 33.Qe3 Ke7 34.Bd3 Kd6 35.Qf2 Qc5 Black gets in control 36.Qg3 g6 (36...g5 37.Qe1=) 37.Bf1 (37.Qh4!? Qe3 38.Qf6 Qf4 39.Qf4 ef4 40.g3+=) 37...Qe3= 38.Qh4 (better 38.Kh1!?=) 38...Qf4–/+ 39.Qg3 Kc5 40.h4 (40.Qf4!? ef4 41.Be2–+) 40...Kb4–+ 41.Qf4 ef4 42.g3 fg3 43.Kg3 Ka4 44.Kf4 (44.Bh3 Kb4 45.Be6 a4–+) 44...e5 45.Ke3 Kb3 46.Kd2 a4 47.Kc1 a3 48.Kb1 Kc3 (48...f5 49.ef5 gf5 50.Be2–+) 49.Ka2 Kb4 50.Bd3 (50.Bh3 f5 51.ef5 gf5 52.Bf5 Bf3–+) 50...g5 (50...Bc8 51.Ka1–+) 51.h5 (51.c5 bc5 52.h5 c4–+) 51...h6 (51...Bc8 52.Kb1–+) 52.Bf1 (52.c5 bc5 53.b6–+) 52...Bc8 53.Be2 (53.Ka1–+) 53...Be6 54.Ka1 Bc4 55.Bd1 (55.Bd1 Bb5 56.Bc2–+). BeepBeepImAJeep (2500) – kalahari22 (2030), lichess.org, 2018.

5.c4 d6 6.Nf3 Nd7 7.a4 Ngf6 8.Be2 g6 9.0–0 Bg7 10.d4 0–0 11.Nc3 cd4 12.Nd4 Rc8 13.Rc1 Qc7 The backward pawn on c4 becomes a target (13...Nc5 14.Bf3 Bf3 15.Qf3=) 14.Bf3 (14.Nd5 Nd5 15.cd5 Nc5+=) 14...Nc5 (14...Bf3!? 15.Nf3 Qc4–/+) 15.Bb7 Qb7 16.Nc6 Rfe8 17.Ba3 Rc6 (17...Ncd7 18.Nd5 Ne5 19.Ne5 de5 20.Nf6 Bf6 21.Qd5+=) 18.bc6+= Qc6 19.Bc5 Qc5 20.Nd5 Nd7 21.Qb3 Attacks the backward pawn on b6 21...e6 22.Nf4 Ne5 23.Nd3 Nd3 24.Qd3 Rd8 (24...Rc8 25.Rb1+=) 25.Rfd1 Bf8 26.Rb1 d5 (better 26...Rc8!?+=) 27.Rb5+– Qc6 28.cd5 ed5 29.Rd5 Rc8? (better 29...Rd5!? 30.Qd5 Qa4+=) 30.Rb5 Bc5 31.g3 h5 32.Qd7 Qd7 33.Rd7 h4 (33...Re8 34.Rb1+–) 34.gh4 (34.Kg2 hg3 35.hg3 Kg7+–) 34...Kg7 (34...Re8 35.h5 gh5 36.Rb1+–) 35.Kg2 Rh8 36.Kg3 Re8 37.Rd5 (37.Kf4 Rh8 38.Kg5 Re8+–) 37...Re4 38.Rdc5 bc5 39.Ra5 Rc4 40.h3 Rc3 (40...Rc1 41.Kf4+–) 41.Kf3 c4 (41...Kh6 42.Ra7 f5 43.a5+–) 42.Rc5 Rc2 (42...Kh6 43.Kg4+–) 43.a5 (43.h5 gh5 44.Rh5 Ra2+–) 43...c3 (43...Kh6 44.e4+–) 44.a6 (better 44.h5+–) 44...f5?? (44...Ra2 45.Rc3 Ra6 46.Rc5+–) 45.a7 (better 45.Ra5 Rd2 46.a7+–) 45...Ra2 46.Rc3 Ra7 47.Rc5 (47.h5 gh5 48.Kf4 Ra5+–) 47...Ra3 (better 47...Kh6!?+–) 48.h5 gh5 (48...Ra4 49.Rd5+–) 49.Rf5 Kg6 50.Rf4 Rb3 51.h4 Ra3 52.Rd4 Rb3 53.Rd6 Kf5 (53...Kg7 54.Kf4+–) 54.Rd5 (better 54.Rh6!? Ra3+–) 54...Kg6 55.Rg5 Kh6 56.Ke4 (56.Kf4 Rb2 57.f3 Rh2+–) 56...Ra3 (56...Rb2 57.f4 Rh2 58.Kf5 Rh4 59.e4+–) 57.f4 Ra4 58.Kf5 Ra5 59.Ke4?? (59.Ke6 Ra6 60.Ke5 Ra5 61.Kf6 Ra6 62.Ke7 Ra7 63.Kd8 Ra8 64.Kd7 Ra7 65.Kd6 Ra6 66.Kd5 Ra5 67.Kc6 Ra6 68.Kc5 Ra5 69.Kc4 Ra4 70.Kd3 Ra1+–) 59...Ra6?? (59...Ra4 60.Kf3 Ra1+–) 60.Kf3 Re6 (60...Ra4+–) 61.e4 Ra6 62.e5 Ra3 63.Ke4 Ra4 64.Kf5 Ra7 (64...Ra5 65.Rg6 Kh7 66.Kg5+–) 65.Rg6 (better 65.e6 Ra8+–) 65...Kh7 66.Rf6 (66.Rf6 Rg7 67.e6+–) 1–0. BeepBeepImAJeep (2660) – SmbatARM (2190), lichess.org, 2017.

5.c4 e6 6.Nf3 Nf6 7.a4 d5 8.Be2 dc4 9.Bc4 Bd6 10.0–0 0–0 11.d4 Qc7 (11...Nbd7 12.Nbd2=) 12.Nbd2 (12.dc5 Qc5 13.Bf6 gf6=) 12...Nbd7 13.Be2 Ne4 14.Rc1 Nd2 15.Qd2 Rac8 16.h3 Rfd8 17.Qc2 Nf6 (17...cd4 18.Qd3 Nc5 19.Qd4=+) 18.Qb1 Qe7 19.Qa1 cd4 (19...Nd7 20.Rfd1=) 20.Nd4 Bc5 21.Bf3 Bf3 22.Nf3 Nh5 23.Rfd1 h6 24.Qb1 Nf6 25.Qc2 Nd5 26.Qe4 Nb4 27.Qg4 Threatening mate... how? 27...f5 28.Qf4?? (better 28.Qg6+=) 28...Bd6?? (better 28...Nd3 29.Rd3 Rd3–/+) 29.Rc8+– Bf4 (29...Rc8 30.Qd6 Qd6 31.Rd6+–) 30.Rcd8 (30.Rdd8 Kh7 31.ef4 Nd3+–) 30...Kh7 31.R8d7 (better 31.R1d7 Bg5 32.Re7 Be7 33.Rd7+–) 31...Qc5 (31...Qf8 32.ef4 Nd5+–) 32.Rg7 Kh8 33.Rd8 (33.Rd8 Qf8 34.Rf8) 1–0. BeepBeepImAJeep (2575) – DoruAdryan (2300), lichess.org, 2017.

5.Nf3 d5 6.c4 e6 7.Be2 f6 8.0–0 (8.cd5 ed5 9.0–0 Bd6+=) 8...Bd6 9.Ng5 (9.cd5 ed5 10.d4 c4+=) 9...e5= (worse 9...fg5 10.Bg7 Bh2 11.Kh1+–) 10.Ne6 (10.Nh3 Ne7=) 10...Qe7 11.Bg4 g6 (11...dc4 12.Nc3=) 12.d4 ed4? (better 12...cd4 13.ed4 e4=) 13.ed4+– f5? (better 13...h5 14.Bf3 cd4 15.cd5 Qf7+–) 14.dc5+– Qe6 (14...Nf6 15.cd6 Qe6+–) 15.Re1 (15.Re1 Qe1 16.Qe1 Be7 17.Bf3+–) 1–0. DEFFM – GuestBTZG, freechess.org, 2018.

5.Nf3 d5 6.c4 e6 7.Be2 Nf6 8.0–0 Nbd7 9.cd5 ed5 10.Qc2 (10.Nc3 Bd6=) 10...Bd6 11.Nc3 (11.d4 0–0=) 11...0–0 12.d3 (12.Qf5 Qe7=) 12...Re8 (12...Rc8 13.Qa4=) 13.Rfe1 (13.Rac1 Rc8 14.d4 c4=+) 13...Qe7 14.Bf1 (14.d4 c4=) 14...Rac8=+ 15.g3 Ne5 (15...Qd8 16.d4=+) 16.Ne5 Be5 (worse 16...Qe5 17.Na4 Qe6 18.Nb6+=) 17.Bh3 Rcd8 (17...Rc7 18.Na4 Bb2 19.Nb2=+) 18.d4= Bd6 (18...Bc7 19.dc5 bc5 20.Na4=) 19.Na4 Qc7 (19...Nd7!?=) 20.dc5+– bc5 21.Bf6 gf6 22.Bf5 h6 23.Qd1 (23.Rac1 c4+–) 23...Be5 (23...Re5 24.Qg4 Kh8 25.Red1+–) 24.Qg4 (24.Rb1 c4+–) 24...Kf8 25.Rad1 (25.Rab1 Qe7+–) 25...d4 (25...c4 26.h3+=) 26.f4 (better 26.Rc1 de3 27.fe3+–) 26...de3? (better 26...Bd6!?+=) 27.fe5+– Qe5 28.Rd8 Rd8 29.Qf4 Rd2?? (29...Qf4 30.gf4 Rd2+–) 30.Qh6 Ke7 31.Re3 Rg2 (31...Rd1 32.Kf2 Rd2 33.Kf1 Rd1 34.Ke2+–) 32.Kf1 1–0. guest179 – guest540, chessclub.com, 2018.

5.Nf3 d5 6.Be2 Nd7 7.g4 Qc7=+ 8.c4 e5 9.cd5 Bd5 (9...Ngf6 10.Bc4=+) 10.Nc3= Bb7 11.Qc2 (11.Bc4 e4 12.Qb3 Ndf6=) 11...Ngf6 (11...Rd8 12.e4=) 12.g5= Nd5 13.Nd5 Bd5 14.d3 (14.e4 Bb7=) 14...Be7 (14...Bd6 15.h4=+) 15.Rg1 (15.e4 Bb7=) 15...0–0–0 (15...a4!?=+) 16.Nd2+= h6 17.h4 (17.g6 Rhf8 18.Bf3 Bf3 19.Nf3 Kb8+=) 17...hg5= 18.hg5 Rh1 (18...Kb8 19.Qc3=) 19.Rh1+= Bh1 20.0–0–0 (20.Qc4 Rf8+=) 20...Bd5= 21.Rg1 (21.Ne4 Ba2 22.Be5 Qe5 23.Qa2 Bg5=) 21...Ba2=+ 22.Nc4 Bc4 23.Qc4 Rf8 24.Bg4 Kd8 (24...f6 25.gf6 gf6 26.Bf5=) 25.Qd5 (25.Bd7 Kd7 26.Qd5 Qd6 27.Qe5 Qe5 (27...Qd3?? 28.Rd1 Qd1 29.Kd1+–) 28.Be5 f6 29.gf6 gf6=) 25...Qd6 (25...f5 26.gf6 Bf6= (26...Rf6? 27.Be5 Rd6 28.Bd6 Qd6 29.Qd6 Bd6 30.Bd7 Kd7 31.Rg7 Be7 32.f4+–)) 26.Qb7= f5 27.gf6 gf6 (27...Qf6 28.Qd7 Mate attack; 27...Nf6 28.Qc8 Mate attack; 27...Bf6 28.Bd7 Combination; 27...Rf6 28.Be5 Decoy; 27...gf6 28.Bd7 Combination) 28.Bf5 (better 28.Bd7 Qd7 29.Qb8 Qc8 30.Qb6 Qc7 31.Qa6+–) 28...Qb8?? (better 28...Qc7!? 29.Qd5 Rh8=) 29.Qc6 (29.Qd7) 29...Qd6 (better 29...Qa7+–) 30.Qb7?? (better 30.Rg7 Qc6 31.bc6+–) 30...c4?? (better 30...Qc7 31.Qa8 Qc8=) 31.dc4+– a4 (31...Qc7 32.Qd5 Qd6 33.Qa8 Qb8+–) 32.Rd1 Nc5 33.Qb8 1–0. FeegLood (2595) – Blitzstream_twitch (2525), lichess.org, 2015.

5.Nf3 d6 6.Be2 Nd7 7.d4 Ngf6 8.0–0 e6 9.c4 Be7 10.Nbd2 0–0 11.Qc2 Rc8 (11...Qc7 12.Rfe1=) 12.Bd3 (12.dc5 Nc5 13.Ng5 Re8=) 12...d5 13.Rac1 dc4 14.Nc4 (14.Bc4 cd4 15.Bd4 Ba3=) 14...cd4 (14...Bf3 15.gf3 cd4 16.Bd4=) 15.Bd4 (15.Nd4 Nc5=) 15...Nc5 (15...Bf3!? 16.gf3 Ba3=) 16.Bf6+= Bf6 17.Bh7 Kh8 18.Rfd1 Bd5 19.Bf5 (19.e4 Ne4 20.Be4 Rc4 21.Qc4 Bc4 22.Rd8 Rd8–/+) 19...ef5 20.Nb6 Qb6 21.Rd5 Ne4 (21...Rfd8 22.Rf5 g6–/+) 22.Qc8+= Rc8 23.Rc8 Kh7 24.Rc6 Qb7 25.Rf5 (25.h3 Nc3 26.Rf5 Nb5 27.Rh5 Kg6 28.Rg5 Kh6=+) 25...Qd7 (25...Nc3 26.h4=) 26.g4 g6 (better 26...Kg8!? 27.h3 Qd1 28.Kg2 Qe2=) 27.Rf4+– (worse 27.Rcf6 gf5 28.Rf5 Qd1 29.Kg2 Qe2 30.Ng5 Ng5 31.Rg5 Qa2–/+; 27.Rff6?! Qg4 28.Kf1 Nf6 29.Rf6 Qc4 30.Kg2 Kg7–/+) 27...Qd1 (27...Qd5 28.Re4 Qe4 29.Rf6 Qg4 30.Kh1+=) 28.Kg2 Qe2 1–0. GuestYJKS – GuestWPMP, freechess.org, 2018.

5.Nf3 e6 6.c4 d5 7.Nc3 g5? (7...Nf6!?=) 8.h3 (better is 8.Nd5!? f6 9.Ng5 fg5 10.Qh5 Kd7 11.Nb6 Qb6 12.Bh8+–) 8...f6 (8...Bg7 9.cd5 Bd5 10.d4+/–) 9.Be2 (9.d4 Ne7+/–) 9...Bd6 (9...d4 10.Na4 d3 11.Bf1+/–) 10.cd5 Qc7? (better is 10...ed5 11.Na4 h6+/–) 11.de6+– Ke7 12.0–0 Bg3 13.fg3 g4 14.Nh4 gh3 15.gh3 Qg3 16.Ng2 Qg2 0–1. Fournier,Frederic (1945) – rihu2009, Active, 2011.

5.Nf3 e6 6.c4 Nf6 7.Nc3 d5 8.Rg1 d4 (8...Bd6 9.d4=) 9.ed4 (9.Na4 de3 10.de3 Nbd7=) 9...cd4 10.Na4 (10.Ne2 Bc5=) 10...Nbd7 (10...Bc5 11.Bd3=) 11.Nd4 Rc8 12.d3 (12.Rh1 Be7=) 12...Ne5 (12...Bd6!?=) 13.Ne6+= Bb4 14.Ke2 Qe7? (14...fe6 15.Be5 0–0=) 15.Be5?? (better 15.Ng7 Kf8 16.Nf5+–) 15...Qe6–/+ 16.f4 Nd7 17.Kf2 f6?? (17...Ne5 18.Qe2 Bd6 19.fe5 0–0 (worse 19...Be5 20.Qe5 Qe5 21.Re1 Qe1 22.Ke1+–) 20.ed6 Qf6 21.Kg3 Qd6 22.Kh3 Qh6 23.Kg3 g5–+) 18.Bd4 (18.Bc3 Bc3 19.Nc3 0–0+–) 18...0–0 19.Be2 Nc5 (19...Rfe8 20.Bf3 Qd6 A) 21.Bb7? Qd4 22.Kg3 Re3 23.Bf3 Bd6–+ (23...Rd3?! 24.Qe2 Rc4 25.Rgd1–+); B) 21.Be3 Re3 22.Ke3 (22.Bb7 Qf4 23.Bf3 Ne5–+) 22...Re8 23.Kf2 Qf4 24.d4=+) 20.Nc5 (better 20.Bc5!? Bc5 21.Nc5 bc5 22.Bf3+–) 20...bc5+– 21.Bg4?? (better 21.Be3+–) 21...f5–/+ 22.Be5 (better 22.Qe2!? Qe2 23.Be2 cd4 24.Rgd1–/+) 22...fg4–+ 23.a3?? (23.Kg3 Rcd8 24.Rf1–+) 23...Qe5 24.g3 Qd4 (24...Rf4 25.gf4 Qf4 26.Qf3 Qf3) 25.Kf1 (25.Ke2 Rce8 26.Kf1 Rf4 27.Qf3 Rf3 28.Kg2 Rf2) 25...Bf3 (25...Rf4 26.gf4 Qf4 27.Qf3 Qf3) 26.Qc2 Bc3 (26...Qa1 27.Kf2 Qd4 28.Kf1 Qe3 29.ab4 Rce8 30.Qd1 Be2 31.Ke1 Bd3 32.Qe2 Qe2) 27.Rc1 Bb2 28.Rb1 Ba3 29.Rb3 (29.Rg2 Bg2 30.Kg2 Rce8–+) 29…Bb4 (29...Bb4 30.Rb1 Rce8–+) 0–1. FeegLood (2495) – ferrari9182 (2305), lichess.org, 2015.

5.Nf3 e6 6.c4 Nf6 7.d4 d6 8.dc5 dc5 9.Qd8 Kd8 10.Nc3 (10.Be2 Bd6+=) 10...Nbd7 (10...Bd6 11.Bd3+=) 11.0–0–0 (11.Be2 Ke8+=) 11...Ke8 12.Be2 Be7 13.Rd2 h6 (13...Ng4 14.Rf1+=) 14.Rhd1 Rg8 15.Na4 (15.Ne1 Rd8+=) 15...Rb8 (better 15...Rd8!? 16.Bd3 Ba8+=) 16.Ne5+– Ne5 17.Be5 Rd8 18.Nb6 Rd2 (18...Ne4 19.Rd7 Nf2 20.Rb7 Rd1 21.Kc2+–) 19.Rd2 Bg2 20.f3 g5 (20...h5 21.Nc8 Nd7 22.Ne7 Ke7 23.Bd6 Kf6 24.Bc7+–) 21.Na8 g4 22.Nc7 (22.b6!? Kf8 23.b7 Kg7+–) 22...Kf8 23.fg4 (better 23.Bf4!? Rh8 24.fg4+–) 23...Ng4+= 24.Bf4 e5 25.Bg4 Rg4 26.Bh6 Kg8 27.Nd5?? (27.Kb2 Be4 28.Rd7 Rg2 29.Kc1 Rg1 30.Kd2 Rg2 31.Kd1 Rg1 32.Ke2 Rg2 33.Kd1 Rg1 34.Kd2 Rg2 35.Kd1=) 27...Bh4 (better 27...Rc4!? 28.Nc3 Ba8=+) 28.Nb6 (28.e4 Be4 29.b6 Rg1 30.Rd1+–) 28...Rg6 (28...Bf1 29.Rd6=) 29.Na4?? (better 29.Nd7 Be4 30.Nc5+–) 29...Rh6?? (better 29...Bf3 30.Nc5 Rh6=+) 30.Rg2+– Kh7 (30...Kf8 31.Nc5 Ke8 32.Nb7+–) 31.Nc5 Be7 32.Nd7 f6 (32...e4 33.b6 Rc6 34.Rc2+–) 33.b6 Rh4 (33...f5 34.Rd2 Rc6 35.b7 Rc4 36.Kd1+–) 34.b7 (better 34.c5 Bd8+–) 34...Rc4 35.Rc2 (better 35.Kd2 Bd6 36.Nf6 Kh6+–) 35...Rb4 (35...Rc2 36.Kc2 Bd6 37.Nf6 Kg6 38.Nd7+–) 36.b8Q Rb8 37.Nb8 Ba3 38.Kb1 Bb4 (38...Bd6 39.Nd7 Kg7 40.Rc6+–) 39.Rc6 (39.Nc6 Be1+–) 39...Kg6 (39...f5 40.Rf6 Bc5 41.Rf5 Be3 42.Nc6+–) 40.Nd7 Bd2 (40...Kf5 41.Rf6 Ke4 42.Kc2+–) 41.Ne5 Kg5 (41...Kf5 42.Nc4 Be1+–) 42.Nf3 Kg4 43.Nd2 f5 44.Rc4 Kg5 45.Rf4 Kg6 46.Nf3 a4 47.Kc2 a3 48.Ra4 Kf6 49.Ra3 Ke6 50.Ra4 f4 51.Rf4 Kd6 52.Nd4 Kd5 53.Kd3 Kc5 54.h4 Kb4 55.h5 (55.Rf5 Ka3 56.Kc3 Ka2 57.Rf1 Ka3 58.Ra1) 55...Ka3 (55...Kc5 56.h6 Kd6 57.h7 Ke7 58.h8Q Kd7 59.Rf7 Kd6 60.Qf8 Ke5 61.Qc5) 56.h6 (56.Kc3 Ka4 57.Rf6 Ka5 58.h6 Ka4 59.Ra6) 56...Kb2 (56...Kb4 57.h7 Ka4 58.h8Q Ka5 59.Qh5 Kb6 60.Rf7 Ka6 61.Qb5) 57.h7 Ka3 58.h8Q Kb2 (58...Ka2 59.Rf2 Ka3 60.Qf8 Ka4 61.Ra2) 59.Nc2 (59.Qh2 Ka3 60.Nb5) 59...Kb1 (59...Ka2 60.Qa1 Kb3 61.Rb4) 60.Qa1 1–0. FeegLood (2825) – hiimgosu, lichess.org, 2015.

5.Nf3 e6 6.c4 Nf6 7.Be2 d6 8.0–0 Be7 9.d3 Nbd7 10.Nbd2 Rc8 11.Qc2 Qc7 12.Rad1 0–0 13.Rfe1 Qb8 14.Bf1 Bd8 (14...d5=) 15.a4 Bc7 16.Qc3 Rfd8 17.h3 Ne8 (17...d5 18.cd5 ed5 19.Be2=) 18.Qc2 Ndf6 (18...d5 19.cd5 ed5 20.Bc3=) 19.Bc3 (19.d4 cd4 20.ed4 Bf3 21.Nf3 d5+=) 19...d5= 20.Qb2 dc4 21.dc4 Ne4 22.Ne4 Be4 23.Ng5 Bg6 24.Nf3 f6 25.Qc1 Rd1 26.Rd1 Rd8 27.Be2 Qc8 28.Ne1 Bb8 29.Rd8 Qd8 30.Bb2 Qc7 31.g3 Nd6+= 32.Bf3 Kf8 33.Ng2= e5 34.Bd5 Qd7 35.g4 Be4 36.f4 Bd5 37.cd5 e4 38.f5 Nf7 39.Qc4 Qe7 40.h4 Nh6 41.Qe2 Qd7 42.Qd1 Nf7 43.Kf2? h5!–+ 44.Nf4 Bf4 45.ef4 hg4 46.Kg3 Nh6 47.Be5 Nf5 (47...Nf5 48.Kh2 g3 49.Kg1 Nh4–+) 0–1. Bennett,Hilton Petrie – Othman,A Moussa (2340), Asia–chT Genting Highlands, 1998.

5.Nf3 Nf6 6.Be2 e6 7.c4 Be7 8.0–0 0–0 9.d4 d5 10.Nbd2 Nbd7 11.a4 Rc8 12.Qb3 Qc7 (12...Bd6 13.Ba3=+) 13.Rac1 Qb8 (13...cd4 14.Bd4 e5 15.Bb2=+) 14.h3 (14.Ba3 Bd6=) 14...Rfd8 (14...cd4 15.Nd4 Rfd8 16.Qc2=+) 15.Rfe1 (15.Ba3 Bd6=) 15...Ne4 (15...cd4 16.ed4 Qf4 17.Ba3 Ba3 18.Qa3 dc4 19.Bc4 Bf3 20.Nf3=) 16.cd5 (16.Ne4 de4 17.Ne5 Qc7=) 16...ed5 (16...Bd5 17.Bc4 Qb7 18.Red1=) 17.Ne4 (17.dc5 Ndc5 (17...Bc5? 18.Ne4 de4 19.Ng5+–) 18.Qa2 Qd6=) 17...de4 18.Nd2 (18.Ne5 Ne5 19.de5 Bd5=) 18...Bf6 (18...Qd6!?=) 19.Bc4+= Rf8 20.Bd5 (20.Red1 cd4 21.Bd4 Be5+=) 20...Qa8 21.Bc4 Rce8 (21...Qb8 22.Red1+=) 22.Nf1 Re7 (22...Rc8 23.Ng3+=) 23.Qa2 (23.Ng3 g6+=) 23...cd4 (23...Ree8 24.Ng3+=) 24.ed4 Rfe8 (better 24...Ree8!?+=) 25.Ba3 Bd4 26.Be7 Re7 27.Red1 Bc5 28.Bf7! Kf8 (28...Rf7 29.Rd7 Pinning (29.Rd7 Decoy)) 29.Bd5 (29.Bg8 Nf6 30.Bc4 Qe8+–) 29...Ne5 30.Rc5! bc5 31.Bb7 Qb7 (31...Rb7 32.Qd5 Qb8 33.Qc5 Kg8 34.Qd5 Nf7 35.Qe4+–) 32.Rd8 Re8 33.Re8 Ke8 34.Qg8 (34.Qg8 Ke7 35.Qg7 Nf7 36.Qh7+–) 1–0. DEFFM – GuestQRPW, freechess.org, 2018.

5.Nf3 Nh6 +=.

5.h4 d5= 6.Nf3 Nf6 7.c4 e6 8.Rh3 (8.cd5 Nd5 9.h5 Nd7=) 8...Bd6=+ 9.Nc3 Nbd7 10.a4 (10.cd5 ed5 11.d4 c4=+) 10...Qc7 (10...0–0 11.d3–/+) 11.cd5=+ ed5 12.Bd3 Ke7 (12...0–0!?=+) 13.Bf5= Rhe8 14.Qb1 g6 15.Bd7 Nd7 (15...Qd7 16.Qd3=+) 16.h5= Ne5 17.hg6 hg6 (17...fg6?? 18.Ne5 Rh8 19.Nf3+–) 18.Ne5 Be5 19.f4 (19.Rh7 Kd8 20.Qa2 Qd7=+) 19...Bd6 (19...Bc3 20.Bc3 d4 21.ed4 Kd7 22.Re3 Qf4 23.Qd3–/+) 20.Rh7 (better is 20.Qd3 d4 21.Ne4=) 20...d4 (better is 20...Kd8 21.Qa2 c4=) 21.Qg6+/– Rf8 22.Ne4 Be4 23.Qe4 Kd7 24.Qd5 (24.ed4? Rae8 25.Qe8 Re8 26.Kd1 Ke7–+) 24...Ke7 25.Rc1 (25...de3 26.Qe4 Kd7 27.de3+–) 1–0. Aasum,Anker – Wartig,Wolfgang, corr SOK–90–55, 1990.

5.c4 d5

6.a4 e6 7.Nf3 Nf6 8.Be2 Bd6 9.Nc3 0–0 (9...Nbd7 10.cd5 ed5 11.0–0=+) 10.0–0 (better 10.cd5 ed5 11.d4=+) 10...Be5?? (better 10...Nbd7=+) 11.Ne5+– d4 12.Na2 Ne4 (12...Qd6 13.f4+–) 13.d3 Ng5 (13...Nd6 14.ed4 cd4 15.Ba3+–) 14.ed4 cd4 (14...f6 15.Nf3 cd4 16.Nd4+–) 15.Ba3 Re8 (15...f6 16.Bf8 fe5 17.Ba3+–) 16.f4 f6 17.Nc6 Nc6 (17...Nh3 18.gh3 Nc6 19.bc6 Bc6 20.Bh5+–) 18.bc6 Bc6 (18...Nh3 19.gh3 Bc6 20.Bh5+–) 19.fg5 fg5 (19...f5 20.Bf3 Bf3 21.Rf3 Qg5 22.Qb3+–) 20.Bf3 (20.Bf3 Qd7 21.Nc1+–) 1–0. vendelo (1705) – tsc64 (1660), PlayOK, 2018.

6.Nf3 Nf6 7.a4 Nbd7 8.Be2 Qc7 9.0–0 (9.cd5 Nd5 10.0–0 e5=) 9...e5 10.cd5 Nd5 11.Nc3 Be7 12.Qb3 Nc3 13.Bc3 0–0 14.Qb2 Now all is on e5 14...Bf6 15.d3 e4 16.de4 Be4 17.Rac1 Rad8 18.Nd2 Bb7 19.Bf3 (19.Rfd1 Rfe8=) 19...Ne5 20.Be2 Rfe8 21.Qc2 Qe7 22.Ne4 Be4 23.Qe4 Ng6 (23...Nd7 24.Qe7 Re7 25.Rfd1=) 24.Qe7+= Re7 25.Bf6 gf6 26.Rfd1 Red7 27.Rd7 Rd7 28.Rc2 Ne5 29.f4 Ng6 30.g4 Ne7 31.Kf2 Kf8 32.h4 h6 33.h5 Nd5 34.Rd2 (34.Bc4 Nb4 35.Rc3 Rd2 36.Ke1 Rg2=) 34...Ke7+= 35.Bf3 (35.Bc4!? Nc3 36.Rd7 Kd7 37.Bb3+=) 35...Nc3= 36.Rd7 Kd7 37.g5 fg5 38.fg5 Ke7 39.gh6 Kf8 40.Ke1 Na4 41.Kd2 Kg8 42.Bd5 Kh7 (42...c4 43.Bc4 Nc5 44.Kc3+–) 43.Bb3 (43.Bf7 Kh6 44.Kc2 c4+–) 43...Kh6 44.Ba4 Kh5 45.Kd3 Kg5?? (45...Kg4 46.Ke4 f5 47.Kd5 Kf3+–) 46.Kc4 Kf5 47.Kd5 f6 48.Kc6 Ke4 49.Kb6 Ke3 (49...c4 50.Ka5 c3 51.b6+–) 50.Kc5 f5 51.b6 f4 52.b7 f3 53.b8Q f2 54.Qe5 (54.Qe5 Kd3 55.Bd1 Kd2 56.Qe2 Kc3 57.Qc2; 54.Qg3 Ke2 55.Qg4 Kd2 56.Qf4 Ke2 57.Bb5 Kd1 58.Qf2 Kc1 59.Bd3 Kd1 60.Qe2 Kc1 61.Qc2) 1–0. BeepBeepImAJeep (2855) – luci087 (2550), lichess.org, 2017.

6.Nf3 Nf6 7.Be2 dc4 8.0–0 c3 9.Nc3 Nbd7 10.a4 e6 11.d4 Bd6 12.dc5 (12.Qc2 Qc7=) 12...Nc5 13.Nd4 Qc7 14.Bf3 (14.f4!?=) 14...Bh2=+ 15.Kh1 Be5 16.Bb7 Qb7 17.Nc6 Qc7 (17...Nfd7 18.Rc1=+) 18.Rc1 (18.Nd5 Nd5 19.Be5 Qb7=) 18...0–0 (18...Bd6 19.Nb1=+) 19.Ba3 (19.Nd5 Nd5 20.Be5 Qb7=) 19...Rad8 (better 19...Bd6!?=+) 20.Nd8+= Rd8 21.Qf3 Bd6 (21...h6 22.Nb1+=) 22.Ne2 (22.Rfd1 Rc8+–) 22...Qe7 23.Nd4 e5?? (23...Nfe4 24.Bc5 Qh4 25.Qh3 Qh3 26.gh3 Nc5+–) 24.Nc6 (24.Nc6 Qd7 25.Nd8+–) 1–0. BeepBeepImAJeep (2530) – LwGhCh (2390), lichess.org, 2018.

6.Nf3 Nf6 7.Be2 e6 8.0–0 Be7 9.a4 0–0 10.d4 Nbd7 11.Nbd2 Rc8 12.Rc1 cd4 13.Nd4 dc4 (13...Nc5 14.cd5 Bd5 15.Bf3=) 14.Nc4 Nd5 15.Bf3 Nc5 16.Ne5 Bf6 (16...Bd6 17.Nec6 Qg5 18.e4=) 17.Nec6+= Qd7 18.Ba3 e5? (18...Nb4 19.Nb4 ab4 20.Bb4+–) 19.Nf5!? e4? (19...Qf5 20.Bc5) 20.Qd5 (better 20.Bg4 Ne6 21.Nfe7 Be7 22.Ne7 Kh8 23.Nc8 Rc8 24.Rc8 Qc8 25.Bf5+–) 20...Qd5+= 21.Nfe7 Be7 22.Ne7 Kh8 23.Nd5 Bd5 24.Be2 f5 25.Rfd1 Rfd8 (25...Bb3!? 26.Rd6 Ba4 27.Rb6 Nd3+=) 26.Bc5 bc5 27.g3 c4 (better 27...g5+–) 28.Rd4?? (better 28.Bc4 Bc4 29.Rd8 Rd8 30.Rc4+–) 28...c3+= 29.Bd1 (29.b6 Rc5 30.b7 Rb8 31.Rc3 Rc3 32.Rd5 g6+=) 29...g5 (29...g6 30.Bc2 Kg7 31.b6=) 30.Bc2 Kg7 (30...Bb7!?+=) 31.Rcd1+– Rc5 32.Bb3?? (better 32.g4 fg4 33.Be4 Be4 34.Rd8+–) 32...Bb3–/+ 33.Rd8 Bd1 (33...c2 34.Rc1 Ba4 35.Kf1 Bb5 36.Ke1–+) 34.Rd1 c2 (34...Rc4!? 35.Rc1 Ra4 36.Rc3 Rb4 37.Rc7 Kf6–/+) 35.Rc1= Kf6 (35...Rc4=) 36.Kf1 (better 36.b6!? Rc6 37.b7+=) 36...Ke5 Black intends f4 37.Ke2 f4 (37...Rc4!?–/+) 38.ef4 gf4 39.Kd2 (better 39.gf4 Kf4 40.Kd2=) 39...Kd4?? (better 39...f3–/+) 40.Rc2 e3 41.fe3 fe3 42.Kd1 Rf5 43.Re2?? (better 43.Ke1+–) 43...Rf1–+ 44.Re1 Rf2 45.Re2?? (better 45.b6 Rb2 46.Kc1 Rb6 47.Rd1 Ke4 48.Rd7–+) 45...Rf1 (better 45...Kd3 46.Re3 Ke3–+) 46.Re1= Rf2 47.Re2 Rf1 (better 47...Kd3 48.Re3 Ke3–+) ½–½. BeepBeepImAJeep (2645) – Wieczoorxd (2490), lichess.org, 2015.

4.Bb2 c6

5.a4 cb5 6.ab5 a4 7.c4 (7.Nc3 d6+–) 7...Qc7 (7...d5 8.cd5 Bd5 9.Ra4 Ra4 10.Qa4+–) 8.Ra4 Be4 (8...Ra4!? 9.Qa4 f6+–) 9.Nc3 Ra4 10.Qa4 (10.Ne4?! Ra8=) 10...f6?? (better 10...Nf6+–) 11.Ne4 Qb7 (11...e6 12.Be2+–) 12.Bd3 Nh6 13.Nf3 e6 14.0–0 Be7 15.c5! bc5 (15...bc5 16.Rc1 Decoy; 15...Bc5 16.Nc5 Combination) 16.Rc1 d5 (16...d6 17.Qb3 e5 18.Nc3+–) 17.Nc5 Bc5 18.b6 Kf8 (18...Ke7 19.Ba3 Nd7 20.Bc5 Kf7+–) 19.Rc5 Kf7 (19...Qd7 20.Qc2 Ng8+–) 20.Rc7 (20.Rc7 Qc7 21.bc7+–) 1–0. DEFFM – GuestVQRD, freechess.org, 2017.

5.a4 c5 6.Nf3 e6 7.Be2 h5 (7...Nf6 8.0–0+=) 8.0–0 (8.Na3 Nf6+=) 8...h4 (8...Nf6 9.Ne5+=) 9.h3+– Rh7 (9...Nf6 10.d4+–) 10.c4 (10.d4 Nf6+–) 10...g6 (10...Nf6 11.d4+–) 11.Qc2 (11.Nc3 Bg7+–) 11...Bg7 (11...Nf6 12.d4+–) 12.Nc3 f5 (12...Nf6 13.Rad1+–) 13.d4 cd4 14.ed4 (14.Nd4 e5 15.Nf3 Qc7+–) 14...Nf6 (14...g5 15.Rfd1+–) 15.Ng5 (15.c5 Qc7+–) 15...Rh6 16.c5 (better 16.Rfe1+–) 16...Ne4? (16...Nd5 17.c6! Bc8 18.Nd5 ed5+–) 17.Nge4 fe4 18.Ne4 Be4 (18...Ra7 19.Bc1 g5 20.Bg5 Be4 21.Qe4 (21.Bd8?! Bc2 22.Bb6 Rb7+–) 21...Qg5 22.cb6 Bd4 23.ba7 Ba7 24.Qb7+–) 19.Qe4 Ra7 20.Bc1 Rh8 (20...g5 21.Bg5! Qg5 22.cb6 Bd4 23.ba7 Ba7+–) 21.Qg6 Kf8 22.Ra3 d5 (22...Kg8 23.Rf3 Qe7+–) 23.Rf3 Kg8 24.Qe6 Kh7 (24...Rf7 25.Qf7 Kh7 26.Bd3) 25.Bd3 1–0. DEFFM – GuestPFZB, freechess.org, 2018.

5.a4 d5 6.Nf3 Nd7 7.c4 Ngf6 8.bc6 Bc6 9.Bf6 Nf6 (9...ef6 10.Nd4 Bb7 11.cd5 Bd5 12.Qh5=) 10.Ne5 Qc7 (10...Rc8 11.Nc6 Rc6 12.cd5 Qd5 13.Nc3+–) 11.Nc6+– Qc6 12.cd5 Qd5 (12...Nd5?? 13.Bb5 Qb5 14.ab5+–) 13.Nc3 Qd8 14.Bb5 Nd7 15.Qg4 (15.Qf3 Rb8+–) 15...e6 (15...Rc8 16.Rc1+–) 16.Qd4 (better 16.Rc1+–) 16...Bc5? (better 16...Qc7!?+–) 17.Qg7+– Ke7 18.Qg5 Kf8 (18...Ke8 19.Qe5 Rg8 20.Nd5+–) 19.Qh6 Ke7 (19...Kg8 20.0–0+–) 20.Ne4 Qf8 (20...Rf8 21.Rc1+–) 21.Qh4 f6 22.0–0 (22.Bd7 Kd7 23.Nf6 Kd8+–) 22...Rd8 (22...Ra7 23.d4 Bb4 24.Rac1+–) 23.d4 Bd6 (23...Bb4 24.Rac1 Qg7 25.Rc7+–) 24.Rfc1 (24.Nd6 Kd6 25.Rab1 Qf7+–) 24...Qg7 (24...Nb8 25.Nd6 Rd6 26.Rc7 Nd7 27.Rac1+–) 25.Rc6 (25.Nd6 Kd6 26.Rc6 Ke7+–) 25...Rhg8 (25...Bb4 26.Qh3 Qf7 27.Bc4+–) 26.g3 (26.Qh3 Nf8 27.Rb6 Bc7+–) 26...Bb8 (26...Bb4 27.Bc4 Nf8 28.Rb6+–) 27.Bc4 Nf8 28.Rb1 Qg4 (28...Ba7+–) 29.Qf6 Kd7 30.Qf7 Kc6 31.Bb5 Kd5 32.Qb7 1–0. Janek – Gutes, internet free game, 2017.

5.a4 e6 6.Nf3 Ne7 (6...Nf6 7.Be2=) 7.c4 (7.Be2 Nf5+=) 7...d5 (7...Nf5 8.Nc3=) 8.Be2 (8.Nc3 c5=) 8...cb5 (8...Nd7 9.0–0+=) 9.ab5 (9.cb5 Nd7=) 9...dc4= 10.Bc4 Nd7 (10...Nf5 11.0–0=) 11.d4 (11.d3 Nc5+=) 11...Bd5 (11...Rc8 12.Nbd2=) 12.Nbd2 (12.Bd3 Ng6+=) 12...Bc4 (12...Nf6 13.0–0+=) 13.Nc4 Nd5 14.0–0 g6 (14...Rc8 15.Qb3+=) 15.Nfe5 (15.e4 N5f6+–) 15...Ne5+= 16.Ne5 (16.de5 Bb4+–) 16...Bg7 (16...Bd6 17.e4 Be5 18.de5+=) 17.Nc6 (17.e4 Be5 18.de5 Nb4+=) 17...Qc7 (17...Qg5 18.Qa4+=) 18.Ba3 Qb7 (18...Qd7+–) 19.Qf3 (19.e4 Nc7 20.Qb3 Qc8+–) 19...Rc8 (19...Nc3!?=) 20.Rac1 (20.Rfc1 Nc7+–) 20...Bf8 (20...h6 21.e4 Nc7 22.Ne5 Be5 23.de5+–) 21.Bb2 (21.e4 Ba3 22.Qa3 Nf4+–) 21...Be7 (better 21...Bg7!?+–) 22.e4 Nb4 23.d5 0–0 (23...Rf8 24.Bg7 (24.Ne7 Ke7 25.Rc8 Rc8+–) 24...Rg8 25.Ne7 Ke7 26.Bf6 Ke8 27.Rc8 Qc8 28.Qg3+–) 24.Qc3 (24.d6 Bg5 25.Qc3+–) 24...Bc5?? (better 24...f6+–) 25.Qg7 1–0. DEFFM – GuestPYTB, freechess.org, 2016.

5.c4 cb5 6.cb5 Nf6 7.Nf3 e6 8.Be2 Be7 9.Nc3 d6 10.Na4 Nbd7 11.0–0 0–0 12.Nd4 Rc8 13.Rc1 Nc5 14.Nc3 Qd7 15.Nc6 h6 (15...Bc6!? 16.bc6 Qc6= (worse is 16...Rc6 17.d4+/–)) 16.d4+= Nce4 17.Na4 Bd8 18.f3 Ng5 19.Qb3 Bc6 20.bc6 ½–½. Diviak,Ru (1865) – Schwabik,B (2040), Tatranske Zruby SVK, Tatry Open, 2011.

5.Nf3 cb5 6.Bb5 Ba6 (6...Nf6!?+=) 7.Nc3+/– Nf6 8.a4 e6 9.0–0 Bb4 10.Qe2 Nc6?? (better is 10...0–0+/–) 11.Ba6+– Bc3 12.Bc3 Ne4 13.Bg7 Rg8 14.Bb2 Nb4 (14...Qc7 15.Bb5+–) 15.Bb7 Nc2 (15...Ng5 16.Ng5 Rg5 17.f4+–) 16.Rac1 Ra7 (16...Nc5 17.Ba8 Nb4 18.d4 Na4 19.Bb7 Nb2 20.Rc8 Qc8 21.Bc8+– (21.Qb2?! Qb7 22.Kh1 Kf8=)) 17.Be4 Nb4 18.Bh7 (18...Rf8 19.Bg7+–) 1–0. MT – plastikbay, ICC, 2004.

4.Bb2 d6

5.a4 Nd7 6.Nf3 e5 7.c4 (7.Nc3 Ngf6=) 7...Ne7 8.Nc3 Ng6 (8...g6 9.h3=) 9.Be2+= Be7 10.0–0 0–0 11.Qc2 Qc8 12.d4 Re8 13.h3 f6 (13...Nf6!?+=) 14.Nd5+– Bd5 (14...f5!? 15.Qf5 Nf6 16.Qc2+–) 15.cd5+– Ra7 (15...ed4 16.Nd4 (worse 16.Bd4 Nc5+–) 16...Nc5 17.Bh5+–) 16.Bd3 Ngf8 17.Rfe1 g6 18.Bc4 Kg7 19.Bc3 (19.h4 ed4 20.Nd4 Nc5+–) 19...Qb7 20.Ra2 (20.g4 Raa8+–) 20...Bd8 (20...e4 21.Qe4 f5 22.Qd3+–) 21.e4 ed4 22.Nd4 Ne5 23.Be2 Nfd7 (23...Ned7 24.Nc6 Ra8 25.f4+–) 24.f4 Nf7 25.Ne6 Kg8 26.Nd8 Nd8 (26...Rd8 27.Bg4+–) 27.Bg4 Nc5 (27...Re7+–) 28.Bf6 Nf7 (28...c6 29.bc6 (worse 29.dc6 Qf7 30.e5 de5 31.fe5 Nde6+–) 29...Qf7 30.Bg5+–) 29.Bb2 h5 (29...Raa8+–) 30.Qc3 Ne5 31.fe5 Re5 (31...de5 32.Bh5! Re7 33.Qg3+–) 32.Bh5! gh5 (32...Rh5 33.Qg7 Mate attack; 32...gh5 33.Qg3 Double attack) 33.Qg3 Kh7 34.Be5 de5 35.Rf2 c6 36.Rf5 Qg7 37.Rh5 Kg8 38.Rg5 Rf7 39.dc6 Kf8 40.Rg7 Rg7 (40...Ne6 41.Rf7 Kf7 42.Qe5 Nd8 43.Rf1 Kg6 44.Qh8 Nf7 45.Qg8 Kh6 46.Rf7 Kh5 47.Rh7) 41.Rf1 Kg8 (41...Rf7 42.c7 Ke7 43.c8Q Rf1 44.Kf1 Na4 45.Qe5 Kf7 46.Qce8) 42.c7 Rg3 43.c8Q Kh7 (43...Kg7 44.Qf8 Kh7 45.Rf7 Kg6 46.Qg8 Kh5 47.Rh7) 44.Rf7 Kh6 (44...Rg7 45.Qf5 Kh8 46.Rf8 Rg8 47.Qh5 Kg7 48.Rf7) 45.Qh8 Kg5 46.Qf6 Kh5 47.Rh7 1–0. Pierre – Vernixe, internet, 2019.

5.a4 Nd7 6.Nf3 e5 7.Be2 Be7 (7...Qf6 8.0–0=) 8.d4 ed4 9.Bd4 (9.Qd4?? Bf6 10.Qd2 Bb2–+; 9.ed4?! Ngf6+=) 9...Bf6 10.Bf6 (10.0–0 Qe7+=) 10...Ngf6 11.0–0 0–0 12.c4 Nc5 13.Nc3 h6 14.Qc2 Re8 15.Nd4 Nfe4 16.Ne4 Be4 17.Qb2 Qg5 Do you see the mate threat? 18.Nf3 (better 18.Bf3=) 18...f5?? (better 18...Qg6=+) 19.Ng5+– hg5 20.f3 (20.Ra2 g4+–) 20...Bb7 21.e4 (21.Ra3 Re5+–) 21...f4 (21...fe4 22.fe4 Be4 23.Bf3+–) 22.g3 (22.Ra2 Re5+–) 22...Nd7 (22...fg3 23.h3+–) 23.gf4 gf4 24.Kf2 Ne5 25.Rg1 Kh7 (25...Re7 26.Rg5+–) 26.Rg2 (26.Qd2 Rf8+–) 26...g6 (26...Re7 27.Qd2 Rf8 28.Rg5+–) 27.Rag1 Kg7 (27...Re7 28.Rg5+–) 28.Rg6 Kf7 (28...Kf8 29.Rg8 Ke7 30.R1g7 Ke6 31.Re8 Re8 32.Rc7+–) 29.Rg7 (29.Rg7 Kf8 30.Qd2 Ng6 31.R1g6 Re4 32.fe4 Bd5 33.Qd5 Re8 34.Qf5) 1–0. aravind555 (1885) – tadzio54 (1855), lichess.org, 2020.

5.a4 Nd7 6.Nf3 e5 7.Be2 f6 8.0–0 g6 9.d4 Bg7 10.c4 Ne7 11.Nc3 0–0 12.Rc1 e4 13.Nd2 f5 14.Ba3 Nf6 15.c5 d5 16.cb6 cb6 17.Qb3 Re8 18.f4 Rc8 19.Ncb1 (19.Rc2 Qd7+=) 19...Qd7= 20.Rc8 Rc8 21.Rc1 Rc1 22.Bc1 h5 (22...Qc7 23.Qc3 Qc3 24.Nc3=) 23.Nc3 Ng4 24.Bg4 hg4 (worse 24...fg4 25.Nde4 Nf5 26.Kf2+=) 25.g3 (better 25.Ba3 Nc8 26.Nf1=) 25...Qd6 (better 25...Bf6=) 26.Ba3+– Qd7 27.Be7 Qe7 28.Nd5 Bd5 29.Qd5 Kh7 30.Qb3 Qc7 31.Nc4 Qe7? (better 31...Bf6+–) 32.Nb6+– Bf8 (32...Qd8 33.Nc4+–) 33.Nc4 Qb4 (33...Qa7+–) 34.Qb4 Bb4 35.b6 (35.b6 Be7 36.b7+–) 1–0. BeepBeepImAJeep (2510) – youCantHurtMeAnyMore (2035), lichess.org, 2017.

5.a4 e5 6.c4 Nf6 7.Nf3 Be7 8.Be2 0–0 9.0–0 Nbd7 10.d4 e4 11.Nfd2 Re8 12.Nc3 Bf8 13.Qb1 Increases the pressure on e4 13...Qe7 14.Qa2 g6 15.Nd5 (better 15.Rac1!?+=) 15...Nd5=+ 16.cd5 f5 (16...Qg5 17.Bc4=+) 17.Rac1 (17.Nb1 Nf6 18.Nc3 Bh6+=) 17...Nf6 18.Rc6 (better 18.Rc3!?=) 18...Bc6–/+ 19.dc6 Kh8 (19...d5 20.Bc3–/+) 20.Rc1 (20.Bc4 Bh6=+) 20...d5–/+ 21.Nb1 Rad8 22.Ba3 Qg7 23.Bf8 Qf8 24.g3 g5 25.Kf1 f4 26.Ke1 (26.Kg1 Qh6–+) 26...f3 (better 26...Qh6!? 27.Nd2–+) 27.Bf1 Qh6 Black gets the initiative 28.h3 g4 29.h4 Nh5 30.Qa3 Qf6 31.Kd2 Ng7 32.Nc3 Nf5 33.Qb3? (better 33.Kc2–+) 33...Nd4! 34.ed4 Qd4 35.Kc2 Qf2 36.Kb1 Qg3 (better 36...Re5 37.Qd1 d4 38.Rc2 Qg3 39.Rd2–+) 37.Nd5 Qh4?? (better 37...Qe5 38.Ne3 g3–+) 38.Qc3+– Kg8 39.Nf6 (39.Bc4 Rd5 40.Bd5 Re6 41.Be6 Kf8 42.Rd1 Qg5 43.Rd7 Qb5 44.ab5 g3 45.Qh8) 39...Kf7=+ 40.Ne8 Re8 (worse 40...Ke8 41.Bc4 Qe7 42.Re1 Qb4 43.Qb4 ab4 44.Re4 Kf8 45.Rg4+–) 41.Bc4 Kg6 42.Qd4 Qf6?? (better 42...Qg5–/+) 43.Qd6?? (better 43.Qd7 Re7 44.Qg4 Qg5 45.Qc8+–) 43...Qd6–+ 44.Bb3 Qb4 45.Ka2 Rd8 46.Rc4 (46.Bc2 Rd2 47.Ka1 f2 48.Ka2 g3 49.Ka1 Rc2 50.Rc2 f1Q 51.Rc1 Qc1 52.Ka2 Qa4) 46...Rd2 47.Rc2 (47.Bc2 Qc4 48.Ka3 Qb4 49.Ka2 Rc2 50.Ka1 Qe1) 47...Rc2 (47...f2 48.Rd2 Qd2 49.Ka3 f1Q 50.Bf7 Kf7 51.Kb3 Qfd3) 48.Bc2 Qc3 (48...f2 49.Bb3 f1Q 50.Bf7 Qf7 51.Ka1 Qc3 52.Kb1 Qfb3) 49.Be4 Kg5 50.Bf3 (50.Bd5 Qd2 51.Kb3 Qd5 52.Kc3 f2 53.Kc2 Qc4 54.Kd2 f1Q 55.Ke3 Qcd3) 50...Kf4 (50...gf3 51.Kb1 f2 52.Ka2 h5 53.Kb1 f1Q 54.Ka2 Qfa1) 51.Bd1 g3 52.Bf3 (52.Kb1 g2 53.Bf3 g1Q 54.Bd1 Qd1 55.Ka2 Qdc2) 52...g2! 53.Bg2 Qd2 (53...Ke3 54.Bf1 Kd2 55.Kb1 Qc2 56.Ka1 Kc3 57.Bd3 Qb2) 54.Kb3 Qg2 55.Kc4 (55.Ka3 Qd2 56.Kb3 Qd1 57.Kb2 Qd4 58.Kc2 Qa4 59.Kb2 Qb5 60.Kc3 Qb4 61.Kd3 Qb1 62.Kc3 Ke3 63.Kc4 Qd3) 55...Qe4 (55...Qc2 56.Kd4 h6 57.Kd5 Qe4) 56.Kc3 (56.Kb3 Qb1 57.Ka3 Qb4 58.Ka2 Qa4 59.Kb2 Qb5 60.Kc3 Qc6 61.Kd3 Qc1 62.Kd4 Qc2 63.Kd5 Qe4) 56...Qb4 (56...Qb1 57.Kd2 Qb2 58.Kd3 h5 59.Kc4 Qc2 60.Kd4 h4 61.Kd5 Qe4) 57.Kc2 Qa4 58.Kd3 (58.Kd2 Ke4 59.Kc3 Qa3 60.Kd2 Qb2 61.Kd1 Kd3 62.Ke1 Qe2) 58...Qb5 (58...Qd1 59.Kc3 a4 60.Kb2 Qd2 61.Ka3 Qc2 62.Kb4 Qb3) 59.Kc3 Qc6 (59...Qb4 60.Kd3 Qb3 61.Kd2 Qb2 62.Kd3 a4 63.Kc4 Qb3 64.Kd4 b5 65.Kc5 Qc4) 60.Kb2 (60.Kd2 Qc4 61.Kd1 Ke3 62.Ke1 Qe2) 60...Qc5 (60...a4 61.Ka2 Qc3 62.Kb1 a3 63.Ka2 Qb2) 61.Kb3 Qc4 (61...Qd5 62.Kb2 Qd2 63.Kb3 b5 64.Ka3 c6 65.Kb3 b4 66.Kc4 Qc3) 62.Kb2 Qb5 (62...a4 63.Kb1 a3 64.Ka1 Qc3 65.Ka2 Qb2) 63.Ka2 (63.Kc3 a4 64.Kc2 Qb3 65.Kc1 a3 66.Kd2 a2 67.Kc1 a1Q 68.Kd2 Qad1) 63...c6 (63...a4 64.Ka1 a3 65.Ka2 Qb2) 64.Ka1 c5 65.Ka2 ½–½. BeepBeepImAJeep (2565) – otk (2105), lichess.org, 2017.

5.a4 e5 6.Nf3 Nf6 7.c4 (7.Nc3 Nbd7=) 7...g6 8.Nc3 Nbd7 9.Be2 Nc5 10.d4 ed4 11.Nd4 (worse 11.Qd4 Nb3 12.Qd1 Na1=+) 11...Bg7 12.0–0 0–0 13.Bf3 Nfe4 14.Be4 Ne4 15.Nd5 Nc5 16.Qc2 f5 17.Nc6 Bc6 18.bc6 Bb2 19.Qb2 Rf7 20.Ra3 Qf8 21.g3 Re8 22.Rd1 g5 23.Rf1 Re6 24.f3 Rg6 25.Qb1 Rgg7 26.Qb2 h5 Black intends g4 27.Kh1 g4 28.Ra2 (28.Qc2 Rg5=+) 28...gf3=+ 29.Rf3 Ne4 30.Rf4 Qe8 31.Qb5 Rg4 32.Rg2 (32.Kg2 Nc5 33.Kf1 Rf4 34.gf4 Qe4 35.Rg2 Kh7–/+) 32...Kh7–/+ 33.Kg1 Ng5 34.Kh1 Nh3 35.Rf1 Qe4 36.Nf4 Nf4 37.ef4 (37.Rf4 Qe3 38.Rgf2 Rf4 39.Rf4 Kg6–+) 37...h4 38.Qd5 Re7 39.Kg1 (39.Qe4 Re4 (39...fe4?! 40.gh4 Rh4 41.f5=+) 40.gh4 Rg2 41.Kg2 Rc4–/+) 39...Kg7 40.Qe4 Re4 (40...fe4?! 41.Kf2=) 41.Rc1 Kf6 42.Kf2 Rg8 43.Kf3 (43.Rgg1 Rge8 44.Rc2 Re3–+) 43...hg3–+ 44.hg3 Rge8 45.Rc3 (45.Ra2 Re3 46.Kf2 Rb3–+) 45...Re1–+ 46.Ra2 R8e4 47.Kf2 Rh1 48.Kf3 Rf1 49.Kg2 Rb1 50.Kf3 Rb4 51.g4 Rb1 (51...Rec4 52.g5 Kg6 53.Rc4 Rc4 54.Ra1–+) 52.gf5–/+ Kf5 53.Rh2 Rf1 54.Kg3 Rff4 55.Rh7 Rg4 56.Kh3 Rc4 57.Rf3 Ke6 58.Rc7 Rh4 (worse 58...Ra4 59.Rb7–/+) 59.Kg3 Rcg4 (59...Ra4?! 60.Rg7=+) 60.Kf2 Rh2 (60...Ra4?! 61.Rb7=+) 61.Kf1?? (better 61.Ke3 Ra4 62.Rb7–+) 61...Ra4 62.Kg1 Rc2 (62...Rc2 63.Rf1 Rg4 64.Kh1 a4–+) 0–1. marekt (2175) – yzerman123 (2270), gameknot.com, 2015.

5.a4 e6 6.Nf3 Be7?? (6...Nf6 7.Bd3=) 7.Be2?? (better 7.Bg7 Bf6 8.Bh8 Bh8 9.d4+–) 7...Bf6 8.d4 Ne7 9.0–0 Ng6 10.c4 Nd7 11.Nc3 e5 12.Rc1 0–0 13.de5 Nde5 14.Nd4 Qe7 15.Nd5 Bd5 (15...Qd8 16.Qc2+–) 16.cd5+– Rac8 17.Ba1 Qe8 18.Bg4 Nd7 19.Nc6 Ba1 20.Ra1 f5 21.Bh5 Nde5 22.Rc1 Nc6 23.Rc6 (worse 23.dc6 Qe6+=) 23...Qd7 (23...Qe4 24.Bg6 hg6 25.Re1+–) 24.Bg6+– hg6 25.Qc2 Rf7 26.Rc1 Qe7 (26...Re8 27.h3+–) 27.g3 (27.Rb6 f4 28.Qd3 cb6 29.Rc8 Rf8+–) 27...Kh7 28.Qc4 Qe5 (28...g5 29.Rb6 cb6 30.Qc8+–) 29.h4 (29.Rb6 cb6 30.Qh4 Kg8 31.Rc8 Rf8 32.Rf8 Kf8 33.Qd8 Kf7 34.Qc7 Kg8 35.Qb6 Qa1 36.Kg2 Qa4 37.Qd8 Kh7 38.Qh4 Qh4 39.gh4 a4+–) 29...Kh6 (29...g5 30.hg5 Kg6 31.Rb6 cb6 32.Qc8 Qd5 33.Qd8+–) 30.Qf4 (30.Rb6 cb6 31.Qc8 Kh7+–) 30...Qf4 31.gf4 Re7 (31...Re8 32.Rc7 Rc7 33.Rc7+–) 32.R1c4 (better 32.Rb6! cb6 33.Rc8 Kh7+–) 32...Kh5 33.Kg2 Kh4? (33...Re4 34.Re4 fe4 35.Kh3+–) 34.Kf3 (better 34.Rc1 Re3 35.fe3+–) 34...g5+– 35.fg5 Kg5 36.Rb6! cb6 A pinning theme 37.Rc8 Re4 38.Rc6 Ra4 (38...Kf6!? 39.Rd6 Ke5 40.Rb6 Kd5+=) 39.Rd6+– (39.Rb6?! Rb4=) 39...Rb4 40.Rb6 a4 The passed pawn on b5 quickly leads to threats 41.d6 (better 41.Kg3!?+–) 41...Kf6= 42.d7 Ke7 43.Rd6 Do you see the mate threat? 43...Kd8 44.Rd5 a3 (better 44...g6!?=) 45.Rf5+– Ra4 46.b6 Kd7 47.b7 Kc7 48.Rf7? (48.Rb5 Kb8 49.Rb1=+) 48...Kb8–+ 49.Rf4?? (49.Rg7 a2 50.Rg1–+) 49...Kb7 (better 49...Rf4 50.Kf4 a2–+) 50.Ra4+– (50.Ra4 Kc7 51.Ra3+–) 1–0. BeepBeepImAJeep (2595) – shlykov (2380), lichess.org, 2017.

5.Nc3 Nd7 6.Be2?? (6.Nf3 e5=) 6...e5?? (6...Bg2 7.Bf3 Bh1 8.Bh1–+) 7.d4?? (7.Bf3 Qc8+=) 7...Qe7?? (better 7...Bg2 8.Bf3 Bh1 9.Bh1 Ra7–+) 8.de5 (8.d5 Qg5 9.g3 Ngf6+=) 8...Ne5 (8...Bg2!? 9.Nd5 Qd8 10.ed6 cd6=+) 9.Nf3 Nf3 (9...Nf6 10.0–0+=) 10.Bf3+– 0–0–0 11.Bb7 Kb7 12.Qf3 Kb8 13.Qc6 (13.Nd5 Qd7+–) 13...Nf6+= 14.e4 (14.0–0–0 Qe6+=) 14...Qd7?? (14...d5 15.0–0–0 Rd6 16.Nd5 Nd5 17.Qc4–/+) 15.Nd5 (better 15.Qd7 Rd7 16.0–0–0+–) 15...Qc6=+ 16.bc6 Nd5 (better 16...Ne4 17.0–0 Nc5=+) 17.ed5+– Rg8 18.0–0 g6 19.Bf6 (19.Rae1+–) 19...Bg7 (19...Re8 20.Rae1 Bh6 21.f4+=) 20.Bg7 (20.Bd8!? Ba1 21.Bc7 Kc7 22.Ra1+–) 20...Rg7+– 21.Rae1 f5 22.Re7?? (better 22.Re6+–) 22...Re7–+ 23.Rd1 (23.f3 Rde8–+) 23...Re5 (better 23...Rde8 24.Kf1 Re2–+) 24.Rd3 (24.a3 Rde8 25.Kf1 Re2–+) 24...Rde8 (24...Re1) 25.c4 (25.h3–+) 25…Re1 0–1. Agiant – RimusTop, lichess.org, 2019.

5.c4 Nd7 6.Nf3 e5 7.Be2 f5 8.0–0 Ngf6 9.d4 e4N 10.Ng5 Qe7 11.d5 Nc5 12.Bd4 Bc8 (12...g6 13.Nc3+=) 13.Nd2 (13.Nc3 g6+=) 13...g6= 14.f4 (14.Nb3 Bg7=) 14...ef3 15.Ngf3? (15.Bf3 Bh6 16.h4 0–0+=) 15...Bg7 (15...Bh6 16.Nb3–+) 16.h3 (16.Qc2 0–0 17.Rae1 Ng4+=) 16...0–0 (16...Bh6–/+) 17.Rb1? (17.Re1 Bh6 18.Bf1 g5–/+) 17...Bd7 (17...Bh6!? 18.Nb3–+) 18.Ne1 (18.Re1 Bh6 19.Bf1 g5–/+) 18...Rae8 (18...Nfe4 19.Ne4 fe4 20.Rf8 Rf8 21.Bg4–+) 19.Nc2 Nfe4 20.Ne4 Qe4 21.Bf3 Qe7 22.Qd2 Ne4 (22...Be5!?–/+) 23.Be4= Qe4 24.Bg7 Kg7 25.Rf4 Qe7 26.Re1 g5 27.Rf2 Kg6 28.Qd3 Qe4 29.Rd1 (29.Qc3!?=) 29...Qd3–/+ 30.Rd3 Re4 31.Nd4 Rfe8 32.Rf3 h5 33.Kh2? (33.Kf2 h4–/+) 33...h4 (better is 33...g4!? 34.hg4 fg4–+) 34.g3–/+ hg3 35.Kg3 (35.Rg3 Kf6–/+) 35...g4–+ 36.hg4 fg4 37.Rf4 (37.Rf2 Re3 38.Re3 Re3 39.Kf4 Ra3–+) 37...Re3–+ 38.Re3 Re3 39.Kg2 Rc3 (better is 39...a4–+) 40.Nc6?? (40.Ne6 Rc2 41.Kg3 Ra2 42.Rg4 Kf5 43.Rf4 Ke5–/+) 40...Bc6 (better is 40...Kg5 41.Rf8 Rc4 42.Rg8 Kh5 43.Rh8 Kg6 44.Rg8 Kf7–+) 41.bc6 g3 (41...Kg5 42.Rf7–/+) 42.Rf8 Rc4 43.Rc8 Rc5 (43...Kf5 44.Rc7 Ke5 45.Rb7–/+ (45.Kg3? Kd5 46.Rh7 Rc6–+)) 44.Rc7= Rd5 45.Rc8 (worse is 45.Kg3 Rc5–/+) 45...Rc5 46.c7 (worse is 46.Kg3 Kf5–+) 46...Kg7 47.Kg3 b5 48.Rb8 Rc7 49.Rb5 Rc5 50.Rb7 (50.Rb3 Kf7+=) 50...Kf6 51.Kf4?? (51.Rb3 Ke5–/+) 51...Ke6 (51...Rc2 52.a3 Rc3 53.Ke4–+) 52.Ke4?? (52.Rb2 Rc4 53.Ke3 Ke5–/+) 52...Rc4 (better is 52...Rc2–+) 53.Kd3–/+ Ra4 54.Rb2 Ke5 55.Re2 Kd5 56.Rh2?? (better is 56.Rb2–/+) 56...Ra3 0–1. Eremin,Mikhail – Ushakov,Gennady (2230), Ryazan Region, 2010.

5.c4 Nf6 6.Nf3 e5 7.Be2 Be7 8.0–0 0–0 9.a4 Nbd7 10.d4 ed4 11.Nd4 Re8 12.Nd2 Bf8 13.Bf3 Bf3 14.N2f3 Ne5 15.Ne5 de5 16.Nc6 Qc8 (16...Qd6!?+–) 17.Be5+– Qf5 (17...Nd7 18.Bf4+–) 18.Qf3 Qf3 19.gf3 Rac8 20.Bf6 gf6 21.Rad1 Bd6 22.f4 f5 23.Rd5 Kg7 24.Rf5 f6 25.Rd1 Kf7 26.Rfd5 Ke6 (26...Re4 27.Nd4+–) 27.Kf1 Rg8 (27...Kf7 28.Ke2+–) 28.Ke2 Rg2 29.Rh5 Rh8 30.Nd4 Kf7 31.Nf5 Ke6 (31...Kg6 32.Ng3 Rg3 33.Rh4+– (worse 33.fg3 Kh5 34.Kf3 Kg6=+)) 32.Nd6 (better 32.Ng3!? Bf8+–) 32...cd6 33.Rh6 (better 33.f5!? Kd7 34.Rh4 Kc7+–) 33...Rg6 34.Rh5?? (better 34.f5 Kf5 35.Rg6 hg6 36.Rd6+–) 34...Rc8?? (34...Rg2 35.f5 Kd7+–) 35.Rd4 (better 35.f5 Kf7 36.fg6 Kg6+–) 35...Rc5 (35...Rg7 36.Rhd5 Rd7 37.f5 Ke7 38.Kd3+–) 36.Rc5 (better 36.Rh7 d5 37.cd5 Rd5 38.Re4 Kd6 39.Rb7+–) 36...dc5 37.Rd5 (37.Re4 Kf7+–) 37...Rh6 38.Rd8 Rh2 (38...f5+–) 39.Rb8 h5 (39...Rh1 40.Rb6 Kf5 41.Rc6+–) 40.Rb6 Ke7 41.Kf3 (41.Ra6 Rh1+–) 41...h4 (41...Rh1 42.Rc6 Ra1 43.Rc5 Ra4 44.b6+– (44.Rh5?! Rc4 45.b6 Rb4+–)) 42.Rc6 f5 (42...Rh1 43.Rc5 h3 44.Kg3+–) 43.Rc5 h3 (43...Rh1 44.Rf5 h3 45.b6+–) 44.Rf5 Rh1 45.Kg3 Ke6 46.Re5 Kf6 (46...Kd7 47.c5+–) 47.Rh5 (47.b6 h2 48.Rb5 Rg1 49.Kh2 Rg8+–) 47...Rg1 (47...Kg6 48.Rg5 Kf6 49.b6+–) 48.Kh3 Rc1 (48...Rg8 49.c5 Ke6 50.Rh6 Kf7 51.Ra6+–) 49.Kg4 (better 49.b6 Rh1 50.Kg4 Rg1 51.Kf3 Rg8+–) 49...Rc4 50.b6 Ra4 51.Rb5 Rb4 (51...Ra1 52.b7 Rg1 53.Kf3 Rg8+–) 52.Rb4 ab4 53.b7 (53.b7 b3 54.b8Q b2 55.Qb2 Ke6 56.f5 Kd6 57.Qb6 Kd5 58.Qc7 Ke4 59.Qc4 Ke5 60.Qe6) 1–0. BeepBeepImAJeep (2615) – zoranp (2490), lichess.org, 2016.

5.d4 Qd7 6.Nf3 h5 (6...Nf6 7.c4+=) 7.Bd3 g6 (7...Qg4 8.Rg1+–) 8.0–0 (8.d5 Nf6 9.Bf6 ef6+–) 8...Bh6 (8...Nf6 9.Nbd2+–) 9.e4 (9.c4 Nf6+–) 9...Rh7 (9...Nf6 10.Re1+–) 10.Nbd2 Na6?? (better 10...Nf6+–) 11.ba6+– Ba6 12.Ba6 Ra6 13.d5 (13.Re1 Bf4+–) 13...Ra8 14.Nd4 (14.c4 e5+–) 14...Rc8 (14...e5 15.Nc6+–) 15.Nc6 (better 15.f4+–) 15...Qc6 (15...e5+–) 16.dc6 Rd8 (16...Bd2 17.Qd2 e6 18.Rad1+–) 17.Nf3 Kf8 (17...e5 18.Qd3+–) 18.Qd3 Nf6 (18...Ke8 19.Rfd1+–) 19.e5 Ne8 20.e6! Kg8 (20...fe6 21.Qe4 Double attack (21.Qg6 Deflection; 21.Qe4 Decoy)) 21.ef7 Kf7 22.Qd5 (22.Ne5 de5 23.Qd8 Bg7+–) 22...e6 23.Ne5! de5 24.Qd8 Kg7 25.Qe7 Kh8 26.Qe8 Kg7 27.Be5 1–0. GuestCVQQ – GuestWKFK, freechess.org, 2019.

5.d4 Nd7 6.Nf3 Ngf6 7.Bc4 e6 8.0–0 Be7 9.Bd3 h6 10.c4 d5 11.Nbd2 0–0 12.cd5 Bd5 (12...Nd5 13.Qa4+=) 13.e4 Bb7 14.Qc2 (14.Qa4 Nh5+=) 14...Rc8 15.Nc4 (15.Rac1 c6+=) 15...c5 16.Rac1 cd4 17.Bd4 Nc5 Increases the pressure on e4 18.Rfd1 Nd3 (18...Nfe4? 19.Bc5 Rc5 20.Be4 Be4 21.Qe4+– (21.Rd8?! Bc2 22.Rf8 Bf8 23.Rc2 Rb5+–)) 19.Qd3 Be4 20.Qe3 Bd5 21.Nb6 Ne4?? (better 21...Rc1 22.Rc1 Ng4=+) 22.Rc8+– (22.Rc8 Qc8 23.Nc8 Rc8 24.Rc1+–) 1–0. DEFFM – GuestBGMV, freechess.org, 2019.

5.d4 Nd7 6.Nf3 Ngf6 7.Nbd2 e6 8.Bd3 Be7 9.0–0 0–0 10.c4 c5 11.bc6 Bc6 12.a4 (12.Rb1 Rc8+=) 12...Qc7 (12...Rc8 13.Qb3+=) 13.Qc2 e5 14.Rfe1 (better 14.Rfd1+=) 14...Qb7? (better 14...Rae8+=) 15.d5+– (15.de5?! de5 16.Ne5 Ne5 17.Be5 Bg2 18.Bf6 Bf6+–) 15...Nd5 (15...Bd5 16.cd5 Rac8 17.Bc4 Nd5 18.e4+–) 16.Bh7 Kh8 17.cd5 Bd5 18.Bd3 (better 18.Bf5+–) 18...e4? (18...Rac8 19.Qb1 Nc5+–) 19.Be4 Be4 20.Ne4 Rac8 21.Qb1 1–0. onur604 (2320) – ilkerguc61 (2045), lichess.org, 2020.

5.d4 Nf6 6.Nf3 Nbd7 7.g3 (7.Nbd2!?+=) 7...e6 8.Bg2 Be7 9.a4 0–0 10.0–0 Rb8 11.c4 e5 (11...c5!?=) 12.Nbd2 ed4 13.Nd4 Bg2 14.Kg2 Ne5 15.f4 Neg4 16.Nc6?? (16.Qf3 Qd7 17.h3+–) 16...Ne3–+ 17.Kf2?? (17.Kf3 Nd1 18.Bf6–+) 17...Nd1 (18.Rad1 Ng4 19.Kg1 Qd7 20.Nb8 Rb8–+) 0–1. slavisa3 – baretti, Live Game Caissa's Web, 2004.

5.Nf3 Nf6 6.Bc4 (6.Bf6 ef6 7.d4 Qe7+=) 6...Nbd7 7.0–0 e6 8.Nc3 (8.d4 Be7+=) 8...Be7 (8...d5 9.Be2=) 9.d4 (9.Nd4 a4=) 9...0–0 (9...d5 10.Bd3=) 10.Bb3 (10.d5 ed5 11.Nd5 Ne5 12.Ne5 de5=) 10...c5 (10...d5!?=) 11.bc6+= Bc6 12.d5 ed5 13.Nd4 Bb7 14.Nf5 The pressure on the isolated pawn grows 14...Nc5 (14...Rc8!?=) 15.Nd5 Bd5 (15...Nd5 16.Bd5 Bf6 17.Rb1+/–) 16.Bd5 Rc8 (16...Rb8 17.c4+/– (worse is 17.Ne7 Qe7 18.Bf6 Qf6+=)) 17.Bf3 (17.Qf3 Nd5 18.Bg7 Nb4+/–) 17...Qd7 (17...Re8 18.Rb1 Ncd7 19.Ne7 Qe7 20.Bf6 Qf6 21.Bg4+/–) 18.Bg4+/– Ne6 19.Rb1 Ng4 (19...d5 20.e4! Ng4 21.Qg4+–) 20.Qg4 Rc5?? (better is 20...h5 21.Qh5 Rc4+–) 21.Nh6+– (21.Bg7?! Rf5 22.Bh6 Bg5 23.Bf8 Nf8+–; 21.Ng7?! Rg5 22.Nf5 Rc8+– (22...Rg4?? 23.Nh6)) 21...Kh8 22.Bg7! Ng7 23.Qd7 (23.Qd7 Re5 24.Rb6+–) 1–0. Wall,Bill – SamChess, chess.com, 2008.

5.Nf3 Nf6 6.Be2 e5 7.d3 Be7 8.c4 Nbd7 9.Nbd2 0–0 10.0–0 Rc8 11.a4 Re8 12.d4 e4 13.Ne1 (13.Nh4 d5=) 13...Nf8 (13...d5 14.Qb3=) 14.f3 (14.d5 N8d7+=) 14...Ng6 (14...ef3 15.Bf3 d5 16.Nd3=) 15.fe4 (15.d5 ef3 16.Bf3 Rb8+=) 15...Ne4= 16.Ne4 Be4 17.Bf3 (17.Bg4 Rb8=) 17...Bf3 (17...Bg5!? 18.Qb3 Qe7=) 18.Qf3+= (worse 18.gf3 c5=+) 18...Rf8 (18...Bf6 19.Nd3+=) 19.Nd3 Bf6 20.Rab1 Qd7 21.e4 Rce8 22.Rfe1 Re7 23.Nf4 (23.e5 Bh4 24.g3 Bg5+=) 23...Nf4= 24.Qf4 Rfe8 25.Rbd1 Qe6 26.e5 (26.Rc1 Qc8=) 26...de5 (26...Qc4 27.Qd2 de5 28.de5 Qh4=+ (28...Be5? 29.Re5 Re5 30.Be5+–)) 27.de5+= Qc6?? (better 27...g6+=) 28.Bc3 (better 28.bc6 h6+–) 28...Re6 (28...Qc5 29.Kh1 Be5 30.Re5 Re5 31.Be5+–) 29.ef6 (better 29.bc6 Be7 30.Rd7+–) 29...Re1 30.Re1 Re1 31.Be1 Qc5 (31...Qd7 32.Qd2 Qe8 33.Bg3 gf6 34.Bc7+–) 32.Bf2 Qb4 33.h3 gf6 (33...h6+–) 34.Qf6 Qc4 35.Bd4 Kf8 36.Qg7 (36.Qd8) 36...Ke7 37.Qf6 Ke8?? (better 37...Kf8 38.Qd8) 38.Qe5 (better 38.Be5+–) 38...Kf8 (38...Kd8 39.Kh2+–) 39.Qh8 (better 39.Be3 f5+–) 39...Ke7 40.Bf6 Ke6 41.Bd8?? (better 41.Bb2 Ke7 42.Qe5 Kd7 43.Qf5 Kd6 44.Be5 Kc5 45.Bc3 (45.Qh7?! Kb4+–) 45...Kd6 46.Qf6 Kd7 47.g4+–) 41...Qc1= 42.Kh2 Qf4 43.Kg1 Qc1 44.Kf2 Qd2?? (better 44...Qf4 45.Ke1 Qe4 46.Kd1 Qd3 47.Kc1 Qf1 48.Kd2 Qg2 49.Ke1 Qg3 50.Ke2 Qg2 51.Ke3 Qh3 52.Kd2 Qg2 53.Ke3 Qg1 54.Ke2 Kd7=) 45.Kg3+– Qe1 (45...Kd7 46.Bf6 Qe3 47.Kh4 Qh6 48.Kg4 Qg6 49.Bg5 Qe6 50.Kh4 Qe1 51.Kh5 Qd1 52.g4 Qa4 53.Qd8 Ke6 54.Qe7 Kd5 55.Qf7 Kd6 56.Be7 Kd7 57.Bf6 Kd6 58.Qe7 Kd5 59.Qe5 Kc4 60.Qc7 Kd3 61.Qh7 Qe4 62.Qd7 Ke2+–) 46.Kf3 (better 46.Kh2 Kd7 47.Bg5+–) 46...Qd1= 47.Kg3 Qd3?? (47...Qe1 48.Kh2 Kd7 49.Bg5+–) 48.Kh2 (better 48.Kh4 Kd7 49.Bg5 Qc4 50.Kh5+–) 48...Qd6= 49.Kg1 Qd1 50.Kf2 Qd2 51.Kf1 Qd1 52.Kf2 Qd2 53.Kg3 Qd3 54.Kf2 (better 54.Kh4 Kd7 55.Bg5 Qc4 56.Kh5+–) 54…Qd2= ½–½. e4_e5_f4 (1715) – Maegge (1785), lichess.org, 2021.

5.Nf3 Nf6 6.Rg1 e5= 7.g4 Nbd7 (7...Be7 8.g5 Nfd7 9.d4=) 8.g5 e4?? (better 8...Nd5=) 9.gf6+– ef3? (9...Nf6 10.Nd4 Rg8+–) 10.fg7 Bg7 11.Rg7 1–0. FeegLood (2600) – chessstrategy (2360), lichess.org, 2016.

5.Nf3 Nd7

6.d4 Ngf6 7.Nbd2 e6 8.c4 Be7 9.Bd3 0–0 10.0–0 d5 11.a4 Ne4 12.Qc2 Ndf6 13.cd5 ed5 14.Rfd1 Bd6 15.Ba3 Rc8 16.Ne5 Re8 17.Ndf3 (17.Bd6 cd6 18.Nc6 Bc6 19.bc6 Nf2 20.Kf2 Ng4 21.Kg1 Ne3+=) 17...h6 (17...Ba3 18.Ra3 Qd6 19.Raa1+=) 18.Nc6 (18.Rdc1 Qe7 19.Qb3 Qe6+=) 18...Qd7 (18...Bc6 19.Qc6 Ba3 20.Ra3=) 19.Rdc1 (19.Bd6 Qd6 20.Nfe5 Bc6 21.Qc6 Qc6 22.Nc6 Re6+/–) 19...Ng4= 20.Be4 de4 21.Bd6 Qd6 22.Nfe5 Ne5 23.Ne5+= Re7 24.Qb2 Qe6 25.Ra3 Bd5 26.Rac3 f6 27.Nc4 Bb7 28.Qc2 Qd7? 29.Nb6!+– cb6 30.Rc8 Bc8 31.Qc8 Kf7 32.Qd7 Rd7 33.Rc6 Rb7 34.g4 Ke7 35.h4 Kd7 36.h5 Rc7 37.Rc7 Kc7 38.Kg2 Kd6 39.Kg3 Ke6 40.Kf4 (40.Kf4 Ke7 41.Ke4+–) 1–0. Fournier,Frederic – Goutte,Jean Claude, Open Paris FRA, 2000.

6.d4 Ngf6 7.Nbd2 g6 8.a4 Bg7 9.Bd3 0–0 10.0–0 Re8 11.e4 e5 12.de5 Ne5 13.Ne5 de5 14.Qf3 h5 15.Rfe1 Ng4 (15...Nd7 16.Bc4 Qf6 17.Re3+=) 16.Nc4 Qf6 (16...Qg5 17.Rad1+–) 17.Qf6 Bf6 18.f3 Nh6 19.f4 Be7 (19...Rad8 20.Be5 Be5 21.Ne5+– (21.fe5?! Ng4=)) 20.Ne5+– (20.Be5?! Bc5 21.Kf1 Ng4+=) 20...Bc5 21.Kh1 Rad8 22.h3 Bd6 23.Kh2 (23.Rad1 g5+–) 23...h4 24.Kh1 (24.g3 hg3 25.Kg3 Bb4+–) 24...Kh7 (24...g5 25.Nc6 Bc6 26.fg5+–) 25.Bd4 Be5 (25...Ba8 26.Rad1+–) 26.Be5+– f5?? (better 26...Re6+–) 27.ef5 (27.Bc7?! Rc8 28.ef5 Re1 29.Re1 Rc7 30.fg6 Kg7+–) 27...Nf5 28.Bc7 Rd3 (28...Re1 29.Re1 Rd4 30.Re8+–) 29.cd3 (29.Re8?! Rd2 30.Ra3 Rg2=) 29...Rc8 (29...Re3 30.Kh2 Rg3 31.Ra2 (31.Bb6?? Rg2 32.Kh1 Ng3) 31...Rd3 32.Bb6+–) 30.Rac1 Ng3 31.Kh2 Rf8 (31...Kg8 32.Bb6 Rc1 33.Rc1+–) 32.Re7 Kh6 (32...Kg8 33.Be5 Rc8 34.Rc8 (34.Rb7?! Rc1 35.Rb8 Kf7 36.Rb7 Kg8 37.Rb8 Kf7 38.Rb7 Kg8=) 34...Bc8 35.Re8 Kf7 36.Rc8 Nf1 37.Kg1+–) 33.Be5 (33.Be5 Rc8 34.Bg7 (34.Rb7?? Rc1 35.Rh7 Kh7 36.f5 Rh1) 34...Kh5 35.Bb2+– (35.Rb7 Rc1 36.Rb6 Rh1)) 1–0. onur604 (2320) – Viper_yash (2085), lichess.org, 2020.

6.d4 Ngf6 7.Be2 g6 8.0–0 Bg7 9.Nbd2 0–0 10.c4 Re8 11.a4 e5 12.Qc2 (12.d5 Nc5+=) 12...ed4= 13.Nd4 Nc5 14.Bf3 Bf3 15.N2f3 (worse 15.gf3 Nfd7=+) 15...Nfe4 (15...Qe7 16.Rfd1=) 16.Nc6+= Qd7 17.Bg7 Kg7 18.Nfd4 f6 19.f3 Ng5 20.e4 Nge6 21.Rfd1 Nd4 22.Rd4 Ne6 23.Rd5 Nd8 24.Nd4 Re5 (24...Ne6!?+=) 25.Rd1+– Rd5 (25...Qe8 26.Qf2+–) 26.cd5 Nb7? (better 26...Rc8!?+–) 27.Ne6+– Kf7 28.Qc6 (28.Qc7?! Qc7 29.Nc7 Rc8+–) 28...Qc6 29.bc6 (29.dc6?! Ke6 30.cb7 Rb8=+) 29...Nc5 30.Nc7 Rc8 31.Nb5 Na4 (31...Ke7 32.Nc3 h6+–) 32.Nd6 (32.Nd6 Kf8 33.Nc8+–) 1–0. guest124 – guest579, chessclub.com, 2018.

6.Be2 e5 7.0–0 g6 8.d4 Bg7 9.c4 (9.de5 Nh6+=) 9...f5 (9...e4 10.Nfd2=) 10.de5 (10.Nc3 Ngf6+=) 10...de5 11.Qc2 Be4 (11...Qe7 12.Nc3 Ngf6 13.Nd5 Nd5 14.cd5=) 12.Qd2 Bb7 13.Rd1 Qe7 14.Nc3 (14.Qc3 Nc5=) 14...Ngf6 15.Nd5 Nd5 16.cd5 0–0–0 17.d6 cd6 18.Qd6 Qd6 19.Rd6 Nc5 20.Rad1 Rd6 21.Rd6 Kc7 22.Rd1 Bf3 ½–½. forsetinn (2410) – yzerman123 (2210), gameknot.com, 2015.

5.Nf3 e5

6.c4 Nd7 7.Nc3 Ngf6 8.Be2 g6 (8...Be7 A) 9.Qc2 e4 10.Nd4 (10.Ng5 Nc5 11.f3 ef3 12.Bf3 Bf3) 10...Ne5 11.f4 ef3 12.gf3 0–0; B) 9.0–0= e4 10.Nd4 Ne5 11.h3 0–0 12.Rc1 Qd7; 8...h6 A) 9.Qc2 e4 10.Nd4 (10.Nh4 Be7 11.0–0 Ne5 12.Nf5 0–0) 10...Ne5 11.0–0 Be7 12.Nf5 0–0; B) 9.d4 B1) 9...g6 10.0–0 (10.de5 Ne5 11.0–0 Bg7 12.Ne5 de5; 10.Qb3 Bg7 11.0–0 0–0 12.de5 Ne5) 10...Bg7 11.de5 Ne5 12.Ne5 de5; B2) 9...Be7 10.0–0 (10.Qc2 0–0 11.0–0 Re8 12.Rae1 Qb8) 10...0–0 11.Qc2 Re8 12.Rae1 Qb8; C) 9.0–0 C1) 9...Be7 10.Qc2 (10.d4 0–0 11.Qc2 Re8 12.Rae1 Qb8) 10...e4 11.Nd4 Ne5 12.Nf5 0–0; C2) 9...g6 10.Nh4 (10.Ne1 Bg7 11.Bf3 Bf3 12.Qf3 0–0; 10.Qc2 Bg7 11.d4 Qe7 12.e4 0–0) 10...Bg7 11.Bf3 Bf3 12.Nf3 0–0) 9.0–0 (9.Qc2 A) 9...Bh6 10.0–0 (10.d4 0–0 11.0–0 e4 12.Nd2 Qe7; 10.h3 0–0 11.0–0 e4 12.Nd4 Ne5) 10...0–0 11.h3 e4 12.Nd4 Ne5; B) 9...Bg7 10.0–0 (10.d4 Qe7 11.0–0 0–0 12.Rae1 e4) 10...Qe7 11.d4 0–0 12.Rae1 e4; 9.d4 A) 9...Qe7 10.0–0 (10.Qc2 Bg7 11.0–0 0–0 12.Rae1 e4) 10...Bg7 11.Qc2 0–0 12.Rae1 e4; B) 9...Bh6 10.0–0 (10.Qb3 ed4 11.ed4 0–0 12.0–0 Ne4; 10.h4 0–0 11.0–0 Bg7 12.Qc2 Qe7) 10...0–0 11.h4 Bg7 12.Qc2 e4; C) 9...Bg7 10.Qc2 (10.0–0 0–0 11.Qc2 e4 12.Nd2 Qe7) 10...Qe7 11.0–0 0–0 12.Rae1 e4; 9.h4 Bg7 10.h5 gh5 11.Qc2 0–0 12.Nh4 Nc5; 9.h3 A) 9...Qe7 10.0–0 (10.Qc2 Bg7 11.0–0 0–0 12.d4 e4; 10.d4 e4 11.Nd2 Bg7 12.Qc2 0–0) 10...Bg7 11.Qc2 0–0 12.d4 e4; B) 9...Bh6 10.Qc2 (10.0–0 0–0 11.Qc2 Re8 12.Rfe1 Nc5; 10.d4 0–0 11.0–0 e4 12.Nd2 Bg5) 10...0–0 11.0–0 e4 12.Nd4 Ne5; C) 9...Bg7 10.0–0 (10.d4 e4 11.Nd2 0–0 12.Qc2 Qe7) 10...0–0 11.d4 Qe7 12.Qc2 e4) 9...Bg7 10.d3 (10.d4 0–0+= 11.Qc2 Qe7 12.Rae1 e4; 10.h3 0–0 11.d4 e4 12.Nd2 Qe7; 10.Qc2 0–0 11.d4 Qe7 12.Rae1 e4) 10...0–0 11.Qc2 (11.Nd2 Nc5+= 12.Qc2 Qd7; 11.Ng5 Nc5 12.Qc2 Re8) 11...Re8 12.e4 (12.Ng5 Nc5) 12...Nc5 13.Na4 (13.Bc1 Qd7+=) 13...Nfd7 (13...Na4 14.Qa4 Nh5 15.Rae1=) 14.Rad1 (14.Nc5 Nc5 15.Nd2 f5=) 14...Na4 15.Qa4 Nc5 16.Qc2 Ne6 (16...Qd7 17.Rfe1=) 17.Rfe1 (17.a3 f5=) 17...Nf4 (17...f5 18.a3=) 18.Bf1 (18.Bc1 Qf6=) 18...Bc8 (18...f5 19.Bc1=) 19.h3 (19.d4 Bg4 20.Be2 ed4 21.Nd4 Bd4 22.Bg4 Bb2 23.Qb2 Qg5=) 19...Qf6 20.d4 (20.Be2!?=) 20...Nh3=+ 21.Kh1 (21.gh3 Qf3 Discovered attack (21...Qf3 Deflection; 21...Qf3 Overloading)) 21...Bg4–/+ 22.de5 de5 23.Rd3 (23.Re3 Bh6 24.Rb3 a4–/+) 23...Nf4 24.Rde3 Bf3 (24...Rad8 25.c5–/+) 25.Rf3 Qh4 26.Kg1 Ne6 (26...c5 27.Qc3 Qg4 28.Rg3–/+) 27.Rd1 Rad8 28.Rh3 Qe7 (28...Qf6 29.Rf3 Nf4 30.Rd8 Rd8 31.c5=+) 29.Ba3 (29.Bd3=+) 29...Nc5 (29...Qf6 30.Rf3 Nf4 31.Rd8 Rd8 32.Bc1=+) 30.Qe2 (30.Rd5!?=) 30...Rd1 (better 30...Rd4=+) 31.Bc5?? (better 31.Qd1 c6 32.Qf3=+) 31...Rf1!–+ (31...Qc5?! 32.Qd1 Qd4 33.Qd4 ed4 34.Bd3=+; 31...bc5?! 32.Qd1 c6 33.b6=) 32.Kf1 (32.Qf1 bc5 Zwischenzug; 32.Kf1 bc5 Zwischenzug) 32...Qc5 (worse 32...bc5 33.Qd2–+) 33.Qc2 (33.Kg1 Rd8–+) 33...Rd8 (33...c6 34.a4–+) 34.Rd3 Rd3 (34...Rd4 35.Rd4 ed4 36.Qd3–+) 35.Qd3 Qd4 36.Qc2 (36.Qd4 ed4 37.Ke2 f5 38.ef5 gf5–+) 36...Bf8 (36...f5 37.ef5 gf5 38.Ke2–+) 37.f3 (37.g3–+) 37...Bc5 (37...Bc5 38.a4 f5 39.ef5 gf5–+) 0–1. Purczynski,Andrzej – Czarnolewski,Piotr (1675), 25th Poznan Open, 2017.

6.c4 Nd7 7.Be2 Be7 8.d4 (8.0–0 Bf6+=) 8...e4 9.Nfd2 f5 10.Bh5 g6 11.Be2 Ngf6 12.Nc3 c6 13.Qb3 (13.bc6 Bc6 14.d5 Bb7+–) 13...d5 (13...cb5 14.Nb5 a4 15.Qb4+=) 14.bc6 Bc6 15.cd5 (15.Nd5 Nd5 16.cd5 a4=) 15...Bb7 (15...a4 16.Qc4 Bb7 17.a3+=) 16.a3 (16.a4+–) 16...Ba6 (16...a4 17.Qa2+–) 17.Ba6 Ra6 18.Nb5 a4? (better 18...Qb8+–) 19.Qc4 Ra8 (19...0–0 20.d6 Kh8+–) 20.d6 (better 20.Nc7 Qc7 21.Qc7 0–0+–) 20...Rc8 1–0. DEFFM – jiobezt, freechess.org, 2016.

6.c4 Nd7 7.Be2 Ngf6 8.0–0 Be7 9.d4 ed4 10.Nd4 0–0 11.Nd2 Re8 12.Nc6 (12.Bf3 Bf3 13.N2f3 Nc5+=) 12...Bc6= 13.bc6 Ne5 (13...Nc5 14.Rb1=) 14.Qa4 Bf8 (14...Qc8 15.c5 bc5 16.Be5 de5 17.Rab1=) 15.h3 (15.Rfd1 Qe7=) 15...Ng6 (15...Qe7 16.Rfd1=) 16.Rad1 Qe7 17.Rfe1 (17.Bf3 Ne5=) 17...Rad8 18.Qb5 Ne4 19.Ne4 Qe4 20.Rd4 (20.Bd3 Qh4+=) 20...Qe6 (20...Qe7!?+=) 21.Bg4+– Qe5 22.Rd5 Qe7 23.Red1 (23.Bd7+–) 23...Ne5? (better 23...Ra8+=) 24.Be5+– de5 25.Bd7 Rd7?? (25...Qg5+–) 26.cd7 (worse 26.Rd7 Qf6+–) 26...Rd8 27.Qc6 (27.Re5 Qf6 28.Re8 g6+–) 27...Qg5 (27...f6+–) 28.Qc7 Bc5 (28...f5 29.Re5 Be7 30.Qb6 g6 31.Qe6 Kf8+–) 29.Re5 (29.Re5 Qe5 30.Qd8 Bf8 31.Qe8 b5 32.Qe5 f6 33.Qe6 Kh8 34.d8Q h6 35.Qf8 Kh7 36.Qf5 g6 37.Rd7) 1–0. Janek – Bbg, internet free game, 2017.

6.c4 Ne7 7.Be2+=.

6.c4 f5 7.Nc3 Nf6 (7...Be7 8.Be2+=) 8.Qc2 (8.d4 Nbd7+=) 8...g6 (8...Qd7 9.Be2+=) 9.0–0–0 (9.Be2 Bg7+=) 9...c6 10.d4 e4 11.Ng5 Qe7 (11...Bc8 12.d5 Bh6 13.Nge4 fe4 14.Ne4+=) 12.bc6 (12.d5 cb5 13.Nb5 Na6+–) 12...Nc6 13.d5 Ne5 14.Ne6 (14.Qa4 Nfd7 15.Nb5 Rc8+=) 14...Rc8= 15.Qb3 Nfd7 16.f4 (better is 16.Qb5!?+=) 16...ef3=+ 17.gf3 Ba6 (17...Nf3!? 18.Nb5 Nde5=) 18.Nb5+= (< 18.Nf8 Rf8 (18...Nf8?! 19.Nb5=+) 19.c5 Nc5 20.Qb6 Bd3–+ (20...Nf3 21.Ba6 Na6 22.Qa6 Qe3 23.Kc2 Qe4 24.Qd3+=)) 18...Bb5 (18...Nc5!? 19.Nc5 Rc5+=) 19.Qb5+/– Rg8 20.Be2 Bh6 (20...Qh4 21.Qa6 Rb8 22.Rdf1+/–) 21.f4 Nf7+= 22.h4 Nd8= 23.Bf3 Kf7 24.Kb1 Nc5 25.Ng5 Kf8 26.Bf6 Qc7 27.h5 Bg5 28.fg5 Nd7 29.Bb2 Ne5 30.Be2 Ndf7+= 31.hg6 hg6 32.Rh7 Nc4= 33.Bc4 Qc4 34.Rf7! Kf7 35.Qd7 Kf8 36.Qd6 Kf7 37.Qe6 Kf8 38.Ba3 Rc5 39.Bc5 bc5+– 40.Qf6 Ke8 41.d6 Kd7+/– 42.Qe7 Kc6 43.Qc7 Kb5 44.Rc1 Qe4 45.Rc2 Ka6 46.Qc5 Rb8 47.Kc1 Qh1 48.Kd2+– Qg2 49.Kc3 Qe4? 50.d7 f4 51.Qc8!! Rb7 52.Qa8 Kb5 53.Qb7!! (53...Qb7 54.Rb2 Kc6 55.Rb7 Kb7 56.d8Q+–) 1–0. Welling,Gerard (2335) – De Rooij,Raymond, Den Bosch op, 1992.

6.d3 Nf6 7.Nbd2 Be7 8.Be2 0–0 9.0–0 c6 10.c4 cb5 11.cb5 Nbd7 12.a4 d5 13.Ne5 Ne5 14.Be5 Bd6 15.Bf6 Qf6 16.d4 Qg6 17.Nf3 Bc8 18.Bd3 Bf5 19.Nh4 Qh6 20.Bf5 Qh4 21.g3 Qf6 22.Qf3 Rad8 23.Rfc1 g6 24.Be4 Qf3 25.Bf3 Rc8 26.Bd5 Rfd8 27.Rc6 Rc6 28.Bc6 Rc8 29.e4 f6 30.f4 Kf7 31.Rc1 Ke7 32.e5 fe5 33.de5 Bc5 34.Kg2 Rd8 35.Rc2 Rd4 36.Ra2 Rd1 37.Kh3 h6 38.Kg4 Kf7 39.f5 Rd4 40.Kf3 gf5 41.h3 Ke6 42.Kg2 Ke5 43.g4 fg4 44.Re2 Kf4 45.hg4 Ra4 0–1. Trkn – Thomas Lazar, itsyourturn.com, 2000.

6.d4 ed4 7.ed4 Nf6 8.Nbd2 (8.Bd3 Qe7 9.Be2 g6+=) 8...Qe7 (8...g6 9.Bd3+=) 9.Be2 Ne4 (better 9...Qd8!?+=) 10.0–0 Nd2 (10...d5 11.c4 Nd7 12.Re1+–) 11.Qd2 Qd7 (11...Nd7 12.Rae1 0–0–0 13.d5+–) 12.d5 Qf5?? (12...Be7 13.Rfe1 0–0+–) 13.Rfe1 Be7 (13...Qd7 14.Bd3 Kd8 15.Qf4+–) 14.Bd3 Qd5 15.Qc3 Nd7 16.Be4 (better 16.Qc7 Ne5 17.Be5 de5 18.Re5 Qd7 19.Re7 Qe7+–) 16...Qe4 17.Re4 (17.Qg7?! 0–0–0 18.Re4 Be4 19.Qf7 Rhe8+–) 17...Be4 18.Re1 Bf3 (18...d5 19.Qc7 h6 20.Nd4+–) 19.Qf3 Rd8 20.Re7! Ke7 21.Bg7 Rhg8 22.Qe4 Ne5 23.Qh4 Ke8 (23...Kd7 24.Qh7 Ng6 25.h4+–) 24.Qh7 Kd7 (24...Ke7+–) 25.Bf6 Rde8 (25...Ke6 26.Bd8 Rd8 27.f4+–) 26.Qf5 Re6 27.Be5 de5 (27...Ke7 28.Bc3 Rc8+–) 28.Qf7 (28.Qf7 Re7 29.Qd5 Kc8 30.Qg8 Kd7 31.Qd5 Kc8 32.h4+–) 1–0. onur604 (2320) – Alphha (2040), lichess.org, 2020.

6.Be2 Nd7 7.d3 Ngf6= 8.0–0 Be7 9.Nbd2 0–0 10.c4 Re8 11.a3 Nc5 12.e4 (12.d4 ed4 13.ed4 Ne6+=) 12...Ne6 13.h3 Nd7 14.Nb3 f5 15.ef5 Nf4 16.Rc1 Rf8 17.g4 (17.d4!?=) 17...h5 (17...Bg5!? 18.Rc2 Nh3 19.Kh2 Nf4–+) 18.Nh2?? (better is 18.Kh2+=) 18…Nh3 0–1. Fournier,Frederic (1985) – kamikase (1985), Active (3/1), 2005.

6.Be2 f5 7.c4 (7.Nc3 Nd7+–) 7...Be7 8.Nc3 Bf6 (8...Nd7 9.0–0+=) 9.d4 (9.Nd5 Nd7+–) 9...ed4 (9...Nd7!?+–) 10.Nd4 Qe7 (better 10...Bd4!? 11.ed4 Nf6+–) 11.Nf5+– Qe6 12.Nd4 (12.Bf3 Qf5 13.Bb7 Ra7+–) 12...Qe7 (12...Bd4 13.Qd4 Nf6 14.Nd5+–) 13.0–0 Nh6 (13...Nd7 14.Nc6 Qf7 15.Nd5+–) 14.Bf3 Bf3 (14...Ra7 15.Nd5 Qf7 16.Nf6 Qf6 17.Nc6 Qb2 18.Na7 (18.Nb8?! 0–0 19.Bb7 Rb8 20.Bd5 Kh8+–) 18...Bf3 19.Qf3+– (19.gf3?! 0–0+–)) 15.Qf3 (15.Nf3?! Qf7+–; 15.gf3?! 0–0+–) 15...Ra7 16.Nd5 Qd8 (16...Qe5 17.Qh3 0–0+–) 17.Qh5 Nf7 18.Ne6 Qe7 (18...Qd7 19.Ng7 Bg7 20.Bg7+–) 19.Ne7 Ke7 20.Bf6 gf6 21.Nd4 Ne5 22.Qf5 c5 23.Qe6 Kf8 24.Qc8 Kf7 25.Qh8 (25.Qh8 cd4 26.Qh7 Kf8 27.Qa7+–) 1–0. pcmvr – bolu, net–chess.com, 2019.

6.Be2 Nf6 7.0–0 h6 (7...Be7 8.d4 ed4 9.Nd4+–) 8.d4+– e4 9.Nfd2 d5 10.c4 Be7 (10...Bb4 11.c5+–) 11.cd5 (11.Nc3 c6+–) 11...Nd5 (11...Bb4 12.Qc2 Bd5 13.Nc4+–) 12.Ne4+– Ne3? (better 12...0–0+–) 13.fe3 Be4 14.Bf3 Bb1 15.Ba8 (15.Qb1?! Ra7+–) 15...Bg6 16.e4 0–0 17.Qb3 (17.Bd5 Bg5+–) 17...Qd6?! (17...Na6 18.Bd5 Nb4+–) 18.Rac1 Bf6 (18...Nd7 19.Bc6 Rd8+–) 19.e5 Be5 (19...Qb4 20.Qb4 ab4 21.ef6+–) 20.de5 Qd2 (20...Qd7 21.Rfd1 a4 22.Qa4+–) 21.e6 fe6 (21...a4 22.Qc3 Qc3 23.Rc3 c5 24.bc6 Na6+–) 22.Rf8 Kf8 23.Qe6 Qb2 (23...Bf7 24.Qc8 Ke7 25.Ba3 c5 26.bc6 Kf6 27.Rf1 Ke5 28.Qb8 Ke4 29.c7 Bd5 30.c8Q Kd3 31.Qf5 Kc3 32.Qg3 Bf3 33.Qc7 Bc6 34.Qc6 Kd4 35.Qfe4) 24.Rf1 (24.Qg6? Qc1 25.Kf2 Qb2 26.Kg3 Qb5–+) 24...Qf6 25.Rf6 gf6 26.Qf6 Bf7 (26...Ke8 27.Qg6 Kd8 28.Bd5 Nd7 29.Qg8 Nf8 30.Qf8 Kd7 31.Qf6 c5 32.bc6 Kc7 33.Qe7 Kc8 34.Be6 Kb8 35.Qb7) 27.Bd5 Nd7 (27...Ke8 28.Bf7 Kf8 29.Bg6 Kg8 30.Qf7 Kh8 31.Qf8) 28.Qf7 (28.Bf7?! Nf6 29.Bb3 Ke7=) 1–0. GuestMBRL – GuestZCRF, freechess.org, 2020.

6.Be2 Nf6 7.d3 Be7 8.Nbd2 0–0 9.0–0 Nbd7 10.c4 Nc5 (10...Re8 11.a3=) 11.e4 (11.d4 ed4 12.ed4 Ne6+=) 11...a4 12.a3 Nb3 (12...Qd7 13.Rb1=) 13.Rb1 (13.Nb3 ab3 14.Nd2 Ne8+/–) 13...Nd2 14.Qd2 (14.Nd2 Nd7+=) 14...c6 (14...Nh5 15.Ne5 de5 16.Bh5 Be4 17.Rfd1+=) 15.bc6+= Bc6 16.Bc3 Bb5?? (better is 16...Rb8+=) 17.cb5 1–0. Fournier,Frederic (1865) – ayacucho580, Active (5/0), 2005.

6.Be2 g5 7.d4 e4 8.Nfd2 Nf6 9.c4 h5 (9...Bg7!?+–) 10.d5+– g4 (10...Rg8 11.Qc2+– (11.Bh5?! g4=)) 11.Qc2 (11.Ne4 Nbd7+–) 11...Nbd7 12.Ne4 Bg7 (12...Ne5 13.Nbc3+–) 13.0–0 Ne5 14.Ng3 Bc8 15.Nf5 Bf8 (15...Bf5 16.Qf5 Qe7 17.Nd2+–) 16.Nd2 Qd7 17.f4 gf3 18.Nf3 Qf5 (18...Nfg4 19.Ne5 Ne5 20.Qe4+–) 19.Qf5 Bf5 20.Ne5 de5 21.Rf5 Nd7 (21...Ng4 22.Be5 Rh7 23.Bf4+–) 22.Bh5 0–0–0 (22...Bc5 23.Bf7 Ke7 24.Re1+–) 23.Bf7 Bc5 24.Be6 (better 24.Re1!? Rdf8+–) 24...Be3 25.Kh1 Bf4 26.h3 Rdf8 (26...Rhf8 27.g4+–) 27.Be5 Be5 28.Re5 Kd8 29.Bd7 Kd7 30.Re4 (30.Rae1 Rh4 31.Re7 Kd8+–) 30...Rf2 31.Rg4 Kd6 32.a3 Rh7 (32...Re8 33.Rg6 Kd7 34.Rd1+–) 33.Re1 Kc5 (33...Re7 34.Rg6 Kd7+–) 34.Re6 Rc2 (34...Rh6 35.Rh6 Rf1 36.Kh2 Rh1 37.Kh1 a4 38.Rc6) 35.Rc6 1–0. DEFFM – gunawarman, freechess.org, 2018.

4.Bb2 e6

5.a3 Nf6 6.Nf3 Be7 7.Be2 h6 8.0–0 g5 (8...0–0!?=) 9.Ne5 d6 10.Nd3 Bg2?? (better is 10...c6+=) 11.Kg2+– Ne4 (11...d5 12.Rg1+–) 12.Bh5 (better is 12.Bh8 Bf6 13.Bf6 Qf6 14.Ra2+–) 12...Bf6 (12...Nf6 13.c4+–) 13.c3 (better is 13.Qg4 Nc5 14.Nc5 Bb2 15.Ne6 Qd7 16.Nc7 Qc7 17.Qe4 Kd8+–) 13...Nd7? (13...d5 14.Qg4 Qd7 15.c4 Bb2 16.Nb2+–) 14.f3 (better is 14.Qg4 Nec5 15.Nc5 bc5 16.Qe6 Qe7 17.Bf7 Kf8 18.Qe7 Ke7 19.Bc4+–) 14...Nec5 15.Nf2 Qe7 16.d4 Nb7 17.Nd2 0–0–0 18.Ng4 Rdg8 19.Ne4 (better is 19.Qe2+–) 19...Bg7+/– 20.h3 (better is 20.Ngf2!?+/–) 20...f5+= 21.Nef6 Bf6 22.Nf6?? Nf6–+ 23.Qc2 Nh5 24.Kh2 g4 25.fg4 fg4 26.hg4 Rg4 27.Rg1 Qh4# 0–1. cogit – myszkamy, kurnik, 2011.

5.Nf3 c6 6.a4 cb5 7.ab5 Bd6 8.Be2 f6 9.Nh4 g5 10.Bh5 Kf8 11.Nf3 h6 12.d4 Ne7 13.Nc3 Bb4 14.e4 d6 15.d5 ed5 16.0–0 de4 17.Nd4 Qd7 18.Re1 d5 19.f3 f5 20.fe4 de4 21.Nde2 Qd1 22.Rad1 Kg8 23.Rd8 Kh7 24.Rh8 Kh8 25.Nd5 Kh7 26.Ne7 Be1 27.Bg6 1–0. j1a9n55 – black69, kurnik, 2012.

5.Nf3 d5 6.d4 Nf6 7.Bd3 Nbd7 8.Nbd2 (8.0–0 c5=) 8...c5 9.bc6 Bc6 10.0–0 Be7 11.c4 dc4 12.Nc4 0–0 13.Nce5 (13.Ba3 Ba3 14.Na3 Rc8=) 13...Ne5 14.Ne5 Be4 15.Qc2 (15.Be4 Ne4 16.Qd3 Qd5=) 15...Bd3 (15...Rc8 16.Qb3=) 16.Qd3 Qd5 17.Rfc1 Rfc8 18.a3 (18.Ba3 Bd8=) 18...Ne4 (18...b5!?=) 19.f3+= Nd6 20.Qd1 (20.e4 Qb7+=) 20...f6= 21.Nd3 Nc4 22.e4 Qd7 23.Qb3 Nb2 (23...a4!? 24.Qa2 b5+=) 24.Qb2= Rc1 25.Rc1 Qa4 (better is 25...Rd8 26.Rc4 b5=) 26.Rc3?? (better is 26.Qb6 Kh8 27.d5 ed5 28.ed5 Qa3 29.Qe6=) 26...Qd4–/+ 27.Kf1 Bc5 28.Nc5 bc5 29.Qc2 Rd8 30.Ke2? Qg1–+ 31.Rc5 Qg2 32.Ke3 Qg1 33.Ke2 Qh2 34.Ke3 Qh6 35.Kf2?? Rd2 (35...Rd2 36.Qd2 Qd2 37.Kf1 Qd3 38.Kg2 Qa3–+) 0–1. Fournier,Frederic (1820) – redoredo (1730), Active, 2011.

5.Nf3 d6 6.d4 h6 7.Bd3 Nd7 (7...Nf6 8.Nbd2+=) 8.c4 Ne7 9.0–0 g5 (9...g6 10.Nbd2+=) 10.Qc2 Bg7 11.Nc3 0–0 12.a4 (12.h3 f5+–) 12...f5+= 13.Qb3 Kh8 14.Be2 (14.Rad1 g4 15.Nd2 Ng6+=) 14...Ng6 (14...f4 15.Bd3=) 15.c5 (better 15.h3+=) 15...Qe7?? (better 15...bc5 16.Qe6 Qe8 17.Qe8 Rae8 (worse 17...Rfe8 18.dc5 Nc5 19.Nd4=) 18.dc5 Nc5=+) 16.c6+– Bc6 (16...Bc8 17.cd7 Bd7 18.Nd2+–) 17.bc6 Nb8 18.d5 (18.Bb5 Na6+–) 18...e5 19.Nb5 Na6 20.Rab1 (20.h3 Nc5 21.Qc2 e4+–) 20...Nc5 21.Qc2 g4 22.Nd2 h5 (22...e4 23.Ba3+–) 23.f3 (23.e4 f4 24.f3 g3+–) 23...Rac8 (23...e4 24.fg4 hg4 25.Nc4+–) 24.fg4 hg4 (24...Qg5 25.Nc4 hg4+–) 25.Rf5 Rf5 (25...Qh4 26.g3 Qh6 27.Rf8 Rf8 28.Nc4+–) 26.Qf5 Nf8 (26...Qe8 27.Bg4 Ne7+–) 27.Qc8 Bf6 28.Nc7 Kg7 29.Qg4 Kf7 30.Nb5 Ng6 31.c7 (31.c7 Qc7 32.Nc7+–) 1–0. DEFFM – GuestMJFL, freechess.org, 2019.

5.Nf3 Qe7 6.Nc3 (6.Be2 Nf6+=) 6...Nf6 7.Rg1 (7.a3 Qd8+=) 7...Ng8 (7...Qb4 8.Rb1=) 8.Bd3 (8.a3 Nf6=) 8...Qd6 (8...Qb4 9.Rb1=) 9.Ne4 Qe7 10.a4 (10.Neg5 f5+=) 10...Be4 (10...f5 11.Neg5=) 11.Be4+= Ra7 (11...d5 12.Bd3+=) 12.Ba3 Qf6 13.Bf8 Kf8 14.Qc1 (14.d4 Qe7+=) 14...Ne7 (14...d5 15.Bd3=) 15.Qa3 (15.d4 d5 16.Bd3 c5+=) 15...c5 (15...d5!? 16.Bd3 e5=) 16.bc6+= dc6 (16...d5 17.Nd4 Kg8 18.Qd6 Nbc6 19.Nc6 Nc6 20.d4 de4 21.Qc6+–) 17.g4 (better 17.Qd6 Nd7 18.d4+–) 17...Kg8?? (better 17...e5+=) 18.g5+– Qa1 19.Qa1 Nd7 (19...c5 20.h4 Kf8 21.h5+–) 20.h4 (better 20.Ne5+–) 20...f6 (20...Nc5 21.Qe5 Ra8+–) 21.gf6 Nf6 22.Qf6 (22.Qf6 Ng6 23.Rg6 Rf7 24.Rg7 Rg7 25.Qd8 Kf7 26.Ne5) 1–0. FeegLood (1890) – cadmandior (1835), lichess.org, 2015.

5.Nf3 f5 6.Bc4 d5 (6...Nf6 7.0–0+=) 7.Be2+= c5 8.0–0 Nf6 9.Ng5 Qe7 10.f4 Nbd7 11.Na3 g6 12.c4 (12.d4 Bg7=) 12...h6 (12...Bg7 13.d3=) 13.Nf3 Bg7 14.d3 (14.Ne5 Ne5 15.fe5 Ne4=) 14...0–0= 15.Ne5 Ne5 16.Be5 Nd7 (16...Rad8 17.Bf3=) 17.Bg7+= Kg7 18.Bf3 Nf6 19.Qa4 Rad8 20.Rad1 e5 21.fe5 Qe5 22.Rfe1 (22.Nc2 dc4 23.d4 Qe7 24.Qc4 Be4 25.Be4 Ne4=) 22...Rfe8 (22...Qb2 23.Nc2=) 23.Rd2 d4 24.Bb7+/– de3 25.Bf3?? f4?? 26.Rdd1+– g5 27.Nc2 g4 28.Be2?? h5? 29.Rf1 Kh6 30.Rde1 Rg8 31.Kh1 h4 32.Na3?? Qg5? 33.Rg1+/– Nh5 34.Qd1 Ng3 35.hg3 hg3 36.Bg4 Qg4 37.Qg4 Rg4 Do you see the mate threat? 38.Rgf1 Kg5 39.Kg1 Rh8 40.Rf3 Rgh4 41.Kf1 Rh1 42.Ke2 R1h2?? 43.Rg1+= Rh1 44.Rh1 Rh1 45.Nc2 Rc1 46.Ne3 fe3 47.Rg3 Kf4 48.Rf3 Kg4? 49.Rf6 Rc2 50.Ke3 Ra2 51.Rb6 a4 52.d4 cd4 53.Kd4 a3 54.Ra6 Ra1 55.b6 a2 56.Kc5 Rg1 57.b7 (57.b7 Rb1 58.Kc6+–) 1–0. kamret (2175) – peti0815 (2060), GameColony.com, 2003.

5.Nf3 f5 6.Be2 Nf6 7.0–0 Bd6 8.c4 0–0 9.d4 Be7 10.Ne5 d6 11.Bf3 Bf3 12.Nf3 Nbd7? (better 12...Ne4+=) 13.Ng5+– e5 (13...Re8 14.Ne6 Qc8 15.Qf3+–) 14.Ne6 Qc8 15.Nf8 Qf8 16.de5 (16.Nc3 Qf7 17.Qf3 Re8 18.Qf5 Qc4+–) 16...de5 17.Nd2 Rd8 18.Qc2 Nc5 (better 18...e4+–) 19.Be5 Nfe4 20.Ne4 fe4 (20...Ne4 21.Rfd1 Bd6 22.Bd6 Rd6 23.Rd6 Qd6 24.Rd1+–) 21.Bd4 (better 21.Bc7!? Rc8 22.Bb6 Qf5+–) 21...Ne6 (21...Qf5 22.Rad1 Rf8 23.f3+–) 22.Rad1 (22.Qe4 Nd4 23.ed4 Bf6+–) 22...Qf7 (22...Qf5 23.f3+–) 23.Rd2 (23.Qe4 Rf8+–) 23...Ng5 (23...Qg6 24.Be5+–) 24.Be5 Rf8 (24...Rd2 25.Qd2 Qc4 26.Qd7+–) 25.Bg3 (25.Bc7 Qg6 26.Rd7 Bc5+–) 25...h5 (25...Qg6 26.Rd5+–) 26.Rd5 (26.Rd7 Qe6 27.Rc7 Bc5+–) 26...Qg6 27.h4 Ne6 28.Rfd1 Bc5 (28...Bf6 29.Qe2+–) 29.Re5 Qf6 (29...Qg4+–) 30.Qe4 Bd6 (30...Re8 31.Rh5 g6+–) 31.Re6 Qf7 32.Rdd6 (32.Bd6!? Qf2 33.Kh2 cd6 34.Rdd6 Qf5+–) 32...cd6 33.Re7 Qf6 34.Qd5 Kh8 35.Qh5 Kg8 36.Qd5 Kh8 37.Qd6 Qa1 38.Kh2 Qb2 (38...Qf6 39.Qf6 Rf6 (39...gf6?? 40.c5 bc5 41.b6+–) 40.Rg7 Re6+–) 39.Re5 (39.Be5 Rd8 40.Qh6 Kg8 41.Qg7) 39...Rf6 40.Rh5 (40.Re8 Kh7 41.Qd3 Rg6 42.Qd8 Rg3 43.Rh8 Kg6 44.h5 Kf5 45.Qd7 Kg5 46.Qd5 Kf6 47.Rf8 Ke7 48.Rf7 Ke8 49.Qd7) 40...Kg8 41.Qd8 Kf7 42.Qd5 (42.Rh8 Qe5 43.Be5 Kg6 44.Qe8 Kf5 45.Rh5 Ke4 46.Qd7 g5 47.Qd5 Kf5 48.Rg5) 42...Kg6 43.Rg5 (43.Rh8 Qe5 44.h5 Kg5 45.Qe5 Kg4 46.Qe4 Kg5 47.Bh4) 43...Kh7+– 44.Qe4 Kg8 45.Be5 (better 45.Qe8 Kh7 46.Be5 Qf2 47.Rh5 Rh6+–) 45...Rf2 46.Bb2 (46.Bb2 Rf5 47.Rg7 Kh8 48.Qe8 Rf8 49.Qf8; 46.Rg7 Kh8 47.Qh7) 1–0. BeepBeepImAJeep (2695) – GianFresco (2400), lichess.org, 2015.

5.Nf3 f5 6.Be2 Nf6 7.0–0 Be7 8.d3 0–0 9.Nbd2 d5 10.c4 c5 11.Qc2 Nbd7 (11...a4 12.Rad1=) 12.a3 (better is 12.Ng5!? Re8 13.Ne6+/–) 12...h6 13.Rac1 Qc7 14.Rfe1 e5 15.cd5 Bd5 16.Nc4 e4 17.de4 Be4 18.Qb3 a4 19.Qa2 Kh7 20.Qa1 Ng4 21.g3 Bf6 22.Bf6 Ndf6? (better is 22...Ngf6 23.Red1 Rad8=) 23.h3 Qb7 24.Nd6 Qd5? 25.Ne4?? fe4+= 26.Nh4 Nf2?? 27.Kf2+= Ng4 28.Kg1 Ne3 29.Qc3 Qg5 30.Ng2 (30.Ng2 Nf5 31.Bg4+/–) 1–0. ejdrzej (1720) – odcd, kurnik, 2012.

5.f4 f5 6.Nf3 Nf6 7.a4 Be7 8.d4 0–0 9.Bd3 d5 10.Nbd2 Ne4 11.0–0 Nd7 12.c4 Ndf6 13.Rc1 dc4 14.Nc4 Nd5 15.Qe2 Nb4 16.Bb1 Bd5 17.Nce5 Bd6 18.Nd2 Be5 (18...Nd2 19.Qd2 Bb3 20.Bd3 Ba4 21.Bc4=) 19.de5 (better is 19.fe5!? Nd2 20.Qd2+=) 19...Nd2+= 20.Qd2 Qe7 (20...Bb3 21.Qc3 Ba4 22.e4+=) 21.Bc3 Rad8 22.Bb4 ab4 23.Qb2 b3 24.Rfe1 Qb4 25.Rc3 Qa4 26.e4? fe4 27.Kf2? Qd4 28.Kg3 e3 29.Rce3 Qf4 30.Kh3 Qh6 31.Kg3 Qg5 32.Kh3 Bg2! 33.Qg2 Qh6 34.Kg3 Qf4 35.Kh3= Qh6 36.Kg3 Qf4 37.Kh3= Qh6 ½–½. amator111 (1740) – odcd, kurnik, 2011.

5.f4 Nf6 6.Nf3 d5 7.Be2 Be7 8.0–0 0–0 9.Ne5 c5 10.Bf3 Nbd7 11.c4 Ne5 12.fe5 Ne8 13.cd5 Bd5 14.Nc3 Bf3 15.Qf3 Nc7 16.Rad1 Qd7 17.a4 Rad8 18.d4 c4 19.e4 Bb4 20.Qg3 Qe7 21.Bc1 Bc3 22.Qc3 Qb4 23.Qg3?? g6?? 24.Bh6+– Rfe8? 25.Qf4 Qe7 26.Rf2 Rd7 27.Rdf1?? Rd4?? 28.Qf7+– Qf7 29.Rf7 Na8 30.Rg7 Kh8 31.Rff7 Rd1 32.Kf2 Rd2 33.Ke3 Rd3 34.Ke2 Red8 35.Rh7 Kg8 36.Rfg7 Kf8 37.Rh8# 1–0. elsh1403 – anno65, kurnik, 2012.

5.Nf3 Nf6

6.Nc3 Be7 =.

6.c4 Bc5 7.d4 Bb4 8.Bc3 0–0 9.Bb4 ab4 10.Qb3 (10.Bd3 c5=) 10...Qe7 11.Ne5 d6 (11...c5 12.bc6 Nc6 13.f3=+) 12.Nd3 (12.Qb4 Qe8 13.Nf3 Bf3 14.gf3 e5 15.de5 Qe5+=) 12...c5 13.bc6 Nc6 14.Nb4 d5 (14...Rfb8 15.Nc6 Bc6 16.Nc3+=) 15.Nc6+– Bc6 16.Qb6 dc4 17.Qc6 Qb4 18.Nd2 c3 19.Nf3?? (better 19.Bd3 Rfc8 20.Qb5 cd2 21.Ke2+=) 19...c2 (better 19...Qb2 20.Rd1 Ra2 21.Nd2–+) 20.Nd2 Rac8 21.Qf3 (21.Qa6 Qb2 22.Nb3 Qa1 23.Na1 c1Q 24.Ke2–+) 21...c1Q 22.Rc1 Rc1 23.Ke2 (23.Qd1 Rd1 24.Kd1–+) 23…Qb5 (23...Qb5 24.Nc4 Qc4 25.Kd2 Qc2) 0–1. aravind555 (1640) – Will_Rock (1645), lichess.org, 2018.

6.Be2 c5 7.0–0 d5 8.c4 Nbd7 9.cd5 ed5 10.Nh4 Bd6 (10...Qb8 11.f4=) 11.Nf5+= Bf8 12.g4 (12.d4 c4+=) 12...h6 (12...g6 13.Ng3 Bg7 14.f4=) 13.f4 Qc7 (13...Rc8 14.Bf3=) 14.Bf3 0–0–0 (14...g6 15.Ng3=) 15.Qe2 g6 16.Ng3 Rg8 (16...Bg7 17.Rc1+=) 17.Nc3 (17.Na3 Ne4+=) 17...Re8 (17...g5 18.f5=) 18.Qg2 (18.Rac1 g5 19.fg5 Rg5=) 18...d4= 19.ed4 Bf3 (19...Ng4 20.Nd5 Bd5 21.Bd5+=) 20.Qf3+= cd4 (20...Qb7 21.d5+=) 21.Na4+– Bc5 (21...Kb8 22.Bd4 Qc4 23.Bf6 Qa4 24.Bc3+=) 22.Rac1 Qb7 23.g5 Qf3 (23...Nh7 24.Bd4 hg5 25.Bc5 bc5 26.Nc5 Qf3 27.Rf3+–) 24.Rf3 hg5 (24...Ne4 25.Ne4 Re4 26.Nb6 Nb6 27.Rc5 Kb7 28.Re5+– (28.gh6?! Na4 29.Rc2 Rh8+–)) 25.fg5 Nh5 (25...Ne4 26.Ne4 Re4 27.Nb6 Nb6 28.Rc5 Kb8 A) 29.Rf7?! Na4 30.Ba3 Rg4 31.Kh1 Nc5 32.Bc5 A1) 32...Rg5? 33.Bd6 (33.Bd4 Re8 34.Be3 Rb5=+) 33...Kc8 34.b6+–; A2) 32...Re8 33.Bd6 Kc8=; B) 29.Rc6+–) 26.Nh5 gh5 27.Nb6! Nb6 28.Rc5 Kb7 (28...Kb8 29.Bd4 Re4 30.Be5 Ka8+–) 29.Rf7 Ka8 (29...Kb8 30.Bd4 Rd8 31.Be5 Ka8 32.h4+–) 30.Bd4 1–0. DEFFM – GuestXFBC, freechess.org, 2018.

6.Be2 c5 7.c4 d5 8.Qc2 dc4 9.Bc4 Nbd7 10.0–0 Qc7 11.Be2 Bd6 12.h3 0–0 13.d4 Nd5 14.a3 N7f6 15.Nbd2 Rac8 16.Rac1 Qd7 17.Qb3 Ne7 (17...cd4 18.Nd4 Rfd8 19.Nc4=) 18.Rfd1 cd4 19.ed4 (19.Nc4 Ned5 20.Bd4 Qe7+–) 19...h6 (19...Bd5!? 20.Qa4 Rc1 21.Bc1 Qc7=+) 20.Ne5= Be5 (20...Qd8!?=) 21.de5+= Nfd5 22.Bf1 (22.Nc4!? Qd8 23.Bd3+–) 22...Rc1+= 23.Rc1 Rc8 24.Rc8 Qc8 25.Qc4 (25.Nc4 Qc7+=) 25...Qc4 (better 25...Qd7!?=) 26.Nc4+– Ng6 (26...f6 27.Nd6 Ba8 28.g3+–) 27.g3 Bc8 (27...Nf8 28.Bg2+–) 28.Bg2 (28.Bd4 Bb7+–) 28...Bd7 29.a4 Nge7 30.Ba3 (better 30.Bd4!? Nc8 31.g4+–) 30...Nc8+– 31.Bd6 Nc3 32.Nb2 Nd6 33.ed6 Kf8 34.Kf1?? (34.f4 f6 35.Kf2 e5+–) 34...Ke8?? (34...Na4 35.Bc6 Nb2 36.Bd7 a4–+) 35.Ke1 Bc8? (better 35...Nb5 36.ab5 Bb5=) 36.Kd2+– Kd7 (better 36...Nd5 37.Nc4 Kd8+–) 37.Kc3 (37.Kc3 Kd6 38.Nc4 Kc7 39.f4+–) 1–0. dvchess (1940) – Hgvanmoork (1780), lichess.org, 2018.

6.Be2 c6 7.c4 (7.bc6 dc6 8.0–0 Bd6=) 7...d5 (7...Bd6 8.Nc3=) 8.0–0 (8.cd5 Nd5 9.0–0 cb5 10.Bb5 Bc6+=) 8...dc4 9.Bc4 c5 (9...Bd6 10.Be5=) 10.Nc3 Nbd7 (10...Bd6 11.d4=) 11.d4 (11.d3 Bd6+=) 11...Ng4 (11...Rc8 12.dc5 Bf3 13.Qf3=) 12.d5 (12.Rc1 Bd6 13.e4 Bf4=) 12...e5 (12...Nde5!? 13.Bb3 c4=) 13.h3 (better is 13.Qc2+/–) 13...h5? (13...Ngf6!?+/–) 14.Qc2 (better is 14.hg4!? hg4 15.Nh2+–) 14...Ngf6+/– 15.Ng5 (15.Rfd1 Bd6+/–) 15...Bd6 16.Ne6 (better is 16.Rfd1+/–) 16...Qe7? (better is 16...fe6 17.Qg6 Kf8 18.de6 Qe8+/–) 17.Ng7+– Kd8 18.Nf5 Qf8 19.Nd6 Qd6 20.e4 Kc7 21.Ne2 Rag8 22.Ng3 Kb8 23.Rad1 h4 24.Nf5 Qf8 25.f3 Nh5 26.f4 f6 27.fe5 fe5 28.Rd2 Nhf6 29.Rdf2 Qe8 30.a4 Rg6 31.Nd6 Qe7 32.Nf5?? Qf8?? 33.Bd3 Rhg8 34.Ne3 Qh6 35.Rd1?? Qe3–+ 36.Bf1?? Qh3 37.Rd3 Qg4 (38.Be2 Qe4–+) 0–1. Blaszczak,Jan – Jablonski,Jerzy, VI Pilsudski Memorial, Poland, 1992.

6.Be2 Be7 7.0–0 d6 8.c4 Nbd7 9.Qc2 g5 (9...0–0 10.Nc3=) 10.Nd4 (10.Ng5 Rg8 11.Bf3 Qc8+/–) 10...h5 11.Bf3 Bf3 12.Nf3 (worse is 12.gf3 Ne5=) 12...Rh6 (12...g4!? 13.Nd4 Ne5+=) 13.Ng5+– Ng4 14.Nf3 Bf6 15.d4 Qe7 (better is 15...Rg6+–) 16.h3 e5 (16...0–0–0 17.Qe4+– (17.hg4?! hg4 18.Nbd2 Rdh8=)) 17.Qe4 0–0–0 18.Rd1 Rg8 (18...ed4 19.Qe7 Be7 20.hg4 de3 21.gh5 ef2 22.Kf2 Bf6+–) 19.de5 (better is 19.Qa8 Nb8 20.Nc3+– (20.hg4?! hg4 21.Ne1 ed4 22.Bd4 Rgh8+–)) 19...Nge5+/– 20.Ne5 Be5 21.Be5 de5 22.Nc3 Rhg6 23.g3 Qe6 (23...h4 24.Nd5 Qg5 25.g4+/–) 24.Kh2 (24.Qa8 Nb8 25.h4+/–) 24...Kb8 25.Qh4 Qf5 26.Rd2 Nc5 27.Rg1 Ne6 (27...Qf3!?+=) 28.Qe4 Qf6 29.Nd5 Qd8?? (better is 29...Qg7 30.Kh1 Nc5+/–) 30.Nb6!+– cb6 31.Rd8 Rd8 32.Qe5 Kb7 33.h4 Rd2 34.Rg2 Rd8 35.Qh5 1–0. Fischbach,Rainer (1885) – Bannon,Senan, Leipzig VfB op, 2008.

6.Be2 Be7 7.c4 0–0 8.0–0 d5 (8...Ne4 9.Nc3=) 9.Nc3 Nbd7 10.d4 (10.cd5 Nd5 11.Nd5 Bd5+=) 10...c5 (10...dc4 11.Bc4 c6 12.Qe2=) 11.bc6 (11.Rc1 Rc8=) 11...Bc6 12.cd5 (12.Rc1 dc4 13.Bc4 Rc8=) 12...Nd5 13.Rc1 Nc3 14.Rc3 Bb7 (14...Bd5 15.Qb1=) 15.Qa4+= Bb4 16.Rcc1 Nf6 (16...Bd5 17.Ba3=) 17.Ne5 (17.Ba3 Ba3 18.Qa3 Rc8+=) 17...Rc8 (17...Bd5 18.Ba3+=) 18.Rc8+= Qc8 19.Bb5 (19.Rc1 Qd8+=) 19...Qa8 20.Bc6 (20.a3 Bd6 21.Nc4 Bc7+=) 20...Rc8= 21.Rc1 Bd6 22.Bb7 Rc1 23.Bc1 Qb7 24.Nc4 b5?? 25.Nd6+/– Qc6 26.Qb5 Qc1 27.Qf1 Qa3 28.Qa6 Qc1= 29.Qf1 Qa3 30.Nc4 Qa2 31.Qc1 g6 32.f3 Nd5 33.e4 Nb4 34.Ne5 Qc2 35.Qe1 Qb2 36.Qd1 Nc2 37.Nc4 Qa2 38.Qe2?? Qa1–/+ 39.Kf2 Nd4 40.Qb2 Qb2 41.Nb2 e5 42.Ke3 f6 43.Kd3 Kf7 44.Kc4 Ke6 45.Na4 f5 46.Nc5 Kf6 47.Nd7= Ke6 48.Nc5 Kf6 49.Nd7= Ke6 50.Nc5 ½–½. Pletanek,Jan (2275) – Lacha,Jan, IWEX95, 1995.

6.Be2 g6 7.0–0 Bg7 8.c4 c6 9.Ng5 (9.Nc3 0–0+=) 9...0–0 10.d4 d5 11.Nc3 cb5 (11...dc4 12.Bc4 Nbd7 13.Rc1+=) 12.cb5 Ne4 (12...Nbd7 13.Rc1+=) 13.Nge4+– de4 14.Ba3 Re8 15.Qc2 Nd7 16.Ne4 f5?? (better 16...Rc8 17.Qd3 Be4 18.Qe4 e5=) 17.Nd6+– Be4 18.Ne4 (18.Qc3 Bd5 19.Ne8 Qe8+–) 18...fe4 19.Qe4 Nf6 20.Qb7 Nd5 21.Bg4 Qf6 (21...h5 22.Bh3+–) 22.Rac1 Rab8 23.Qd7 (23.Qc6 Rbd8+–) 23...h5 (23...Rbd8 24.Qc6+–) 24.Bf3 Ne7 (24...Qg5 25.Bd6 Rbd8 26.Qc6+–) 25.Rc7 Nf5 26.Rc6 Nh4 (26...Qf7 27.Qf7 Kf7 28.d5+–) 27.Bd5! Rbd8 (27...ed5 28.Rd6 Double attack (28.Rf6 Pinning; 28.Rf6 Deflection; 28.Rd6 Decoy)) 28.Be6 Re6 (28...Kh7 29.Qf7 Qg5+–) 29.Qe6 (29.Re6?! Rd7 30.Rf6 Bf6+=) 29...Qe6 30.Re6 Rc8 31.Rb6 Rc3 (31...Rc2 32.Ra1 Rc3 33.Rb8 Kh7 34.Bf8+–) 32.Rb8 Kh7 (32...Kf7 33.Rb7 Kg8 34.b6 Ra3 35.Rg7 Kg7 36.b7 Ra2 37.b8Q+–) 33.Bc5 g5 (33...Rc2 34.a4+–) 34.Ra8 g4 (34...Rc2 35.Ra5 Rb2 36.Ba3 Ra2 37.b6+–) 35.b6 Rc5 36.dc5 Bc3 37.b7 (37.c6!? Nf5 38.c7 Ne7+–) 37...Be5 38.Re8 Bc7 39.Re7 (39.Re7 Kg6 40.Rc7 Kg5 41.b8Q Nf3 42.gf3 a4 43.Rg7 Kf6 44.Qf8 Ke5 45.Qd6 Kf5 46.e4) 1–0. DEFFM – GuestSWLP, freechess.org, 2019.

6.Rg1 d5 (6...Be7 7.g4 0–0 8.d3=+) 7.g4= c5 (7...h6 8.h4=) 8.bc6 (8.g5 Ne4=) 8...Nc6 9.Bb5 (9.g5 Ne4=) 9...Rc8 (9...Ne4 10.a4=) 10.Nc3 (10.g5 Nd7=) 10...Nd7 (10...Be7 11.h4=+) 11.Ne2= Na7 (11...Qc7 12.Nf4=) 12.Bd3 (12.Bd7!? Kd7 13.Rb1=) 12...Nc5=+ 13.Nf4 Nd3 14.cd3 h6 (14...Nc6 15.Rc1=+) 15.Nh5 (15.Rb1=+) 15...Rg8 (15...f6 16.Nd4 e5 17.Ne6=+) 16.Ne5 (16.g5 hg5 17.Ng5+–) 16...Bd6 (16...f6 17.Ng6–/+) 17.Qf3 (17.Rb1–/+) 17...Be5 (better 17...Rc7!? 18.Qd1 f6–/+) 18.Be5= f6 (18...Qg5!? 19.Bc3 Nb5=) 19.Bf6+= gf6 20.Nf6 Ke7 21.Ng8 Qg8 22.Qf4 (22.d4 Nc6 23.a3 Ba6+=) 22...Qg5 (22...Qg6 23.d4=) 23.Qd4+= Qf6 24.Qf6 Kf6 25.Ke2 (25.f4 Nc6 26.d4 Nb4=) 25...b5 (25...d4 26.h4= (worse 26.ed4 Nc6=+)) 26.h4 (26.f4 d4+=) 26...Kg6 (26...e5 27.f4+–) 27.g5 (27.h5 Kg7+–) 27...h5 28.Rg3 (28.Rac1 e5+=) 28...Nc6 (28...e5 29.Rf3=) 29.Rf3+– Ne7? (better 29...e5+–) 30.Rf6+– Kg7 31.Re6 Rc7 (31...Ng6 32.Rb6 Bc6 33.Rc1+–) 32.Rb1 (better 32.Rc1! Nc6 33.Rc5+–) 32...Bc8 33.Rb6 b4 (33...Bd7 34.R1b5 Bb5 35.Rb5+–) 34.Rb5 Rc2? (better 34...Ra7+–) 35.Ra5 Bg4 (35...Nc6 36.Ra8 Bb7 37.Ra4+–) 36.f3 Bh3 (36...Nc6 37.Kd1 (37.fg4?! Na5 38.gh5 Nc6+–; worse 37.Rd5 Be6 38.Rb5 Ba2+–) 37...Bf3 38.Kc2 Na5 39.Rb4+–) 37.Rb4 Nf5 (37...Rc7 38.Rab5+–) 38.Rd5 (better 38.Rb7 Ne7 39.Re7 Kf8+–) 38...Ng3 (38...Kf7 39.Rb7 Ke6 40.Ra5+–) 39.Kf2 Nh1 40.Ke2 Rd2?? (40...Ng3 41.Kd1 Rc7+–) 41.Kd2+– Kg6 42.Rd6 Kf7 (42...Kh7 43.Rb7 Bd7 44.Rdd7 Kg6 45.Rd6 Kf5 46.Rb5) 43.Rb7 Ke8 44.Rh6 Kd8 (44...Bd7 45.Rh7 Kf8 46.Rhd7 Ke8 47.Rh7 Nf2 48.Rh8) 45.Rh8 1–0. FeegLood (2625) – worldsong (2310), lichess.org, 2015.

4.Nf3 d6

5.Bb2 Nf6 +=.

5.d4+= Nd7 6.Bb2 a4 7.c4 +=.

5.d4+= Nd7 6.Bb2 g6 7.c4 (7.Be2 Ngf6+=) 7...Bg7= 8.Qc2 (8.Be2 e5+=) 8...e5 (8...Bf3 9.gf3 e5 10.de5 de5 11.f4+=) 9.Be2+= Qe7 (9...Nh6 10.0–0+=) 10.de5 (10.0–0 Ngf6+=) 10...Ne5= 11.Nbd2 0–0–0 12.Ne5 Be5 13.Bf3 Nf6 14.Bb7 (14.0–0 Bb2 15.Qb2 Rhe8+=) 14...Kb7 15.Nf3 (15.0–0 Bb2 16.Qb2 h6+=) 15...Bb2 16.Qb2 Ne4 (16...h5 17.0–0+=) 17.Qd4 (17.0–0 Qf6 18.Qc2 Rhe8+=) 17...Qe6 (17...d5 18.0–0 Qc5 19.Ne5 Qd4 20.ed4=) 18.Rc1 (18.Rd1 Rhe8+=) 18...f5 (18...d5 19.cd5 Qd5 20.0–0=) 19.0–0 Rhe8 (19...Rde8 20.Qd5 Qd5 21.cd5=) 20.Qd5 (20.Rfd1 Nf6+=) 20...Qd5 21.cd5 Nc5 22.Rc4 Re4 23.Rfc1 h6 24.Nd2 Re5 25.Rd4 Rde8 26.Nb3 Re4 27.Rcc4 White fights for the Initiative 27...g5 28.h4 g4 29.Re4= Ne4 30.Nd4 Re5 31.Ne6 Exerts pressure on the backward pawn 31...Nc5 32.Nd8+= Kc8 33.Nc6+/– Kd7 34.Ne5+– de5 35.f3 gf3 36.gf3 Kd6 37.e4 fe4 38.fe4 h5 39.Kg2 Kd7 40.Kf3 Kd6 41.Ke3 Kd7 42.Rc5 bc5 43.Kd3 c6 44.bc6 Kc7 45.Kc4 Kb6 46.a4 (46.a4 Kc7 47.Kc5 Kd8 48.d6 Ke8 49.Kd5 Kf7 50.c7 Kf8 51.c8Q Kg7 52.d7 Kh7 53.d8Q Kg6 54.Qe6 Kg7 55.Qdg8#) 1–0. Cattaneo,Romain (1800) – Bessat,Remy (2005), Marseille FRA, 6th Open, 2005.

5.d4 Nd7 6.Bb2 g6 7.c4 Bg7 8.Qc2 e5 9.Be2 Ngf6 10.0–0 Ne4 11.Bd3 f5 12.c5 bc5 13.de5 Qe7 (13...de5 14.Nc3 Ng5 15.Ng5 Qg5 16.g3=) 14.ed6+= cd6 15.Bg7 Qg7 16.Nbd2 d5 17.Rac1 0–0 18.Be2 a4 19.Rfd1 Qe7 20.h4 h6 21.Rf1 Rf7 22.Nb1 (22.Rb1 Qd6=) 22...g5=+ 23.h5? (better 23.hg5!? hg5 24.Nfd2=+) 23...g4–/+ 24.Nfd2 (24.Nh2–/+) 24...Qh4=+ Black plans g3 25.Nc3?? Exerts pressure on the isolated pawn (25.Ne4 fe4 26.Nd2–+) 25...Nf2!–+ 26.Rf2 (26.Rf2 g3 Decoy) 26...g3 27.Nf3 (27.Rf5?? Qh2 28.Kf1 Qh1) 27...gf2 28.Kf1 Qh5 29.Kf2 Rg7 30.Rg1 (30.Na4 Qg4 31.Nc5 Rc8–+) 30...Re8 (30...Nf6 31.Ke1–+) 31.Na4 Nf6 32.Qb2 (32.Nc5 Ne4 33.Ne4 A) 33...Re4?! 34.g3=; B) 33...de4?! 34.Nd4 Qh2 B1) 35.Nf5 Bc8 36.Qb3 Kh7 37.Ng7 Rf8 38.Ke1 Qg1 39.Kd2 Rd8 (39...Kg7?! 40.Qc3 Kh7 41.Qc7 Kg6 42.Qd6 Rf6 43.Qg3 Kf7 44.Qc7 Kg6 45.Qg3 Kf7 46.Qc7 Kg6 47.Qg3=) 40.Kc2 Qe1–+ (40...Kg7?! 41.Qc3 Kg6 42.Qc6 Kf5 43.Qc5 Kf6 44.Qc3 Ke7 45.Qg7 Kd6 46.Qd4 Ke7 47.Qg7 Kd6 48.Qd4 Ke7 49.Qg7=); B2) 35.Bc4 Kh7 36.Ne2=+ (36.Nf5 Rg5 37.Qd1 Rf5 38.Ke2 Bc8–+); C) 33...fe4–+) 32...d4! 33.Nc5 (33.ed4 Bf3 Decoy) 33...Bf3 34.Bf3 Ng4 (34...de3?! 35.Ke2 Qh4 36.g3 Qc4 37.Nd3–+) 35.Ke2 (35.Bg4 de3 36.Ke2 Qg4 37.Kd3 Rd8 38.Kc3 Qd4 39.Kc2 Qc5 40.Kb1 e2 41.Qc2 Qg1 42.Kb2 e1Q 43.Qc4 Kf8 44.Qg8 Kg8 45.Kb3 Qb1 46.Ka4 Ra7) 35...Re3 (35...de3 36.b6 Qh2 37.Qb3 Kh8 38.Qb5–+) 36.Kd2 Rf3! 37.Qd4 (37.gf3 Qh2 Double attack (37...Qh2 Decoy)) 37...Rf2 38.Kc3 Qe8 39.Rc1 (39.a4 Ne3 40.g4–+) 39...Ne3 40.b6 (40.Nd3 Rfg2 41.a4–+) 40...Rf4! 41.Qd6 (41.Qf4 Nd5 Double attack (41...Nd5 Decoy)) 41…Rg6 (41...Rg6 42.Qf4 Nd5 43.Kb2 Rb6 44.Ka1 Nf4 45.Na4 Qa4 46.Rc8 Kf7 47.Rc7 Ke6 48.Rc6 Qc6 49.a3 Qg2 50.a4 Qb2) 0–1. housemd (1960) – yzerman123 (2200), gameknot.com, 2015.

5.d4+= Nd7 6.Be2 e5 +=.

5.d4+= Nf6 6.Nbd2 +=.

5.Be2 e6 6.Bb2 Nd7 7.d4 d5 8.0–0 Ngf6 9.c4 Bd6 10.Nc3 (10.Ne5 0–0+=) 10...dc4 11.Bc4 Bf3 (better 11...0–0!?+=) 12.Qf3+– 0–0 13.e4 (13.a4 h6+–) 13...e5 14.Nd5 Nd5 (14...ed4 15.Bd4 Be5 16.Rfd1+–) 15.Bd5 (15.ed5?! ed4 16.Qg4 Be5=) 15...Rb8 16.de5 (16.Rad1 Qe7+–) 16...Be5+– 17.Be5 Ne5 18.Qb3 (18.Qg3 Ng6+–) 18...Qd6 19.Rfd1 Qf6 20.Rac1 Rbc8 21.Qg3 (21.Qe3 Qh4+–) 21...Rfd8 (21...c6 22.Qc3 cd5 23.Qc8 de4 24.Qc3+–) 22.f4 Ng6 23.Rf1 (23.Rc6 Qb2 (23...Qf4?? 24.Rg6 Qg3 25.Rg3+–) 24.f5 Ne5+–) 23...Qd4 24.Kh1 (24.Rf2 Ne7 25.Bb7 Rb8 26.Rc7 Rd7 27.Rd7 Qd7=) 24...Ne7+= 25.Bb7 Rb8 26.Rc7 Rd7 27.Rd7 Qd7 28.Ba6 Qd2 (28...Qd4 29.Qf3+=) 29.f5 (29.Qf2 Qd3 30.Re1 Qd6+–) 29...Rd8+= 30.f6 (30.Bb7 Qe2 (worse 30...Qa2 31.f6 Ng6 32.Bd5+–) 31.Rg1 Qb5+= (worse 31...Qa2 32.f6 Ng6 33.Qc7+–)) 30...Ng6 31.Qf3 (31.Bb7 Qe2 (31...Qa2 32.Qc7 Qd2 33.Bd5+–) 32.Kg1 Rd1 33.Qb8 Nf8 34.Rd1 Qd1 35.Kf2 Qd4 36.Kg3 Qf6=) 31...Qa2 (31...Rd3 32.Qf5=) 32.fg7 (better 32.Bb7 Qe6 33.fg7+=) 32...Kg7?? (better 32...Nh4 33.Qg4 Qc4=+) 33.Qf6+– Kg8 (33...Kh6 34.Qd8 Qc4+–) 34.Qd8 (34.Qd8 Nf8 35.Bb7+–) 1–0. DEFFM – GuestMVMM, freechess.org, 2018.

3.e3 c5

4.Bb2 d5 5.Be2 (5.Nf3 Nf6+=) 5...Nf6+= 6.Nf3 g6 (6...e6 7.c4=) 7.c4 dc4 8.Bc4 (8.Na3 Bb7+=) 8...Bg7 9.0–0 0–0 10.d4 cd4 (10...Nbd7 11.Qc2=) 11.Bd4 (11.Nd4 Bb7=) 11...Bg4 (11...Bb7 12.Nc3+=) 12.h3 (12.Nbd2 Nbd7 13.h3 Bf3 14.Nf3 Rc8+=) 12...Bf3 13.Qf3 Nbd7 14.Nd2 Rc8 15.Rfd1 e5 16.Bb2 e4 17.Qe2 Qe7 18.a4 Rfd8 19.Ba3 Qe8 20.Rac1 Nc5 21.Bc5 Rc5 22.Nb3 Rg5 23.Nd4 Bf8 24.Nc6 Rd7 25.Qb2 Kg7 26.Rd7 (26.Be2 h5+=) 26...Qd7 27.h4 (27.Kh1 Rh5=) 27...Rc5= 28.g3 Qh3 29.Qc3 Bd6 30.Rc2 Qg4 31.Rd2 Bc7 32.Kf1 Qh3 33.Ke2 (better 33.Kg1=) 33...Qg2–+ 34.Kd1 Rf5 35.Ne7 Qg1 (worse 35...Rf2 36.Rf2 Qf2 37.Nd5 Bg3 38.Nb6–/+) 36.Kc2 Rf2 0–1. DEFFM – GuestKTCQ, freechess.org, 2019.

4.Bb2 e5 5.Be5 f6 (5...d5 6.Nf3+/–) 6.Bg3 Nc6?? (better is 6...d5+/–) 7.bc6+– dc6 8.Nf3 Qd3 (8...Be6+–) 9.Bd3 Bh3 10.0–0 (better is 10.gh3 Ne7+–) 10...Bd6 11.Bd6 Ne7 12.Be7 Ke7 13.gh3 Rad8 14.Nc3 Rd3 15.cd3 g5 16.Kh1 (16.Qa4 Rc8+–) 16...h5 17.Rg1 b5 18.Rb1 f5 19.Rg5 Rh6 20.Rf5 Rf6 21.Rf6 Kf6 22.Qg1 c4 23.dc4 bc4 24.Ne4 Kf5 25.Nd6 Ke6 26.Qg6 Kd5 27.e4 Kc5 28.Nb7 1–0. casouza (2220) – idontknow, net–chess.com, 2006.

4.Bb2 Nf6 5.Nf3+=.

4.Nf3 d5 5.Bb2 f5 (5...Nf6 6.c4=) 6.Be2 Nf6 7.0–0 Bb7 8.d4 c4 9.a4 e6 10.Ba3 Be7 11.Ne5 (11.Ng5 Qd7+=) 11...0–0= 12.Nd2 Ba3 13.Ra3 Nbd7 14.Ndf3 Ne4 15.Nd7 Qd7 16.Ne5 Qe7 (16...Qd6 17.Qa1+=) 17.Qc1 (17.Qa1 Rad8=) 17...Rac8 18.f3 Nd6 19.c3 Nf7 20.Nf7 Rf7 21.f4 g5 22.g3 Kh8 (22...g4 23.Ra1=) 23.Ra1 (23.fg5 Qg5 24.Ra2 e5+=) 23...gf4 (23...g4!?=) 24.ef4+= Rg7 25.Kh1 Rcg8 26.Rg1 e5? (better is 26...Rg6+=) 27.fe5+– (27.de5 d4 28.Rg2 Bg2 29.Kg2 Qh4–+) 27...f4 28.Qf4 Rf8 29.Qe3 Bc8 30.Raf1 Rfg8 31.Bf3 Bh3 32.Bg2 Be6 33.Rf2 Qa3 34.Rgf1 Qa4 35.Rf8 Qb5+/– 36.Rg8 Kg8+= 37.Qf4 Qe8 38.Qf6 b5= 39.Ra1 b4 40.cb4 ab4 41.Ra6+= b3?? 42.Re6 Qa8 43.Bd5 Kh8?? 44.Ba8 (44.Ba8 h6 45.Be4 c3 46.Re8) 1–0. Fournier,Frederic (1795) – alfilstar(C) (1880), Active, 2008.

3.e3 c6

4.Ba3 Nf6+= 5.Nf3 Bb7 6.d4 (6.Nc3 cb5 7.Bb5 Na6+=) 6...g6 7.Be2 (7.c4 cb5 8.cb5 Bh6+=) 7...e6 8.bc6 Nc6 9.Bf8 Kf8 10.c4 Kg7 11.0–0 Qc7 (11...Ne4 12.Nfd2 Nd6 13.Nc3+=) 12.Nc3+= Ne7 13.Nb5 Qb8 14.Qb3 (14.Bd3 Bc6+=) 14...Nf5= 15.Rfc1 h5 16.Qb2 Rc8 (16...Qf8!?=) 17.d5+= ed5 18.cd5 Bd5 19.Rc8 Qc8 20.Ng5 Ne3 (20...Qc5 21.e4 Qb4 22.Qb4 ab4 23.ed5 (23.ef5?! b3=+) 23...Nd5 24.Bf3+–) 21.fe3 (21.Rc1 Qe8 22.Nc7 Qe7+–) 21...Qc5 22.Qd4 (22.Qc3 Rc8 23.Qd4 Qd4 24.Nd4 Rc3+=) 22...Re8+= 23.Qc5 bc5 24.Kf2 Re5 25.h4 Rf5 (25...Ng4 26.Bg4 hg4 27.e4 Be4 28.Re1+–) 26.Nf3+– Ng4 27.Kg3 Bf3 28.Bf3 Ne3 29.Re1 Re5 30.Kf2 Nc4 (30...Ng4 31.Bg4 Re1 32.Ke1 hg4 33.Nd6+–) 31.Rd1 Nb6 32.Nd6 Re6 (32...Kf6 33.Rb1 Nd5 34.Nc4+–) 33.Nb7 c4 (33...Re5 34.Rd6 Re6 35.Re6 fe6 36.Nc5+–) 34.Nc5 Re7 (34...Re8 35.Nd7 Nc8 36.Rc1+–) 35.Rd6+– (35.Rd6 Nc8 36.Rd7 Rd7 37.Nd7+–) 1–0. yzerman123 (2185) – marekt (2135), gameknot.com, 2015.

4.a4 c5 5.Be2 Nf6 6.f4 Bb7 7.Nf3 h6 8.0–0 Qc7 9.Bb2 Ne4 10.d3 Nd6 (better is 10...Nf6!?+/–) 11.e4+– h5 12.Ng5 h4 (12...f6 13.Bh5 Kd8 14.Nf7 Nf7 15.Bf7+–) 13.Bh5 e6 (13...h3 14.gh3 Qc8+–) 14.e5 Nf5 15.Nf7 Bg2 (15...Rg8 16.Nh6 g6 17.Ng8 gh5 18.Qh5 Kd8 19.Qf7+–) 16.Nh8 Kd8 17.Nf7 Kc8 18.Rf2 h3 19.Bf3 (19.Na3 Kb7+–) 19...Ra7 (19...d5 20.Ng5 Qd7 21.c4+–) 20.Bg2 Ne3 (20...hg2 21.Qh5 d5+–) 21.Qf3 d6 22.Nd6 Bd6 23.ed6 Qd6 24.Bh3 Nd5 25.Be5 Qe7 26.Qd5 (26.Qd5 Rd7 27.Be6+–) 1–0. Hullplayer50 – 2pieR, ChessWorld.net, 2016.

4.Nc3 Nf6 +/–.

3.e3 e5

4.Bb2 d6 5.c4 Bb7 6.Nf3 Nf6 7.Be2 Be7 (7...e4 8.Nd4=) 8.Nc3 0–0 9.0–0 Ne4 (9...Nbd7!?+=) 10.Ne4+– Be4 11.d4 f6 12.Bd3 Bb7 (12...Bd3 13.Qd3 Qd7 14.Rac1+–) 13.Qc2 g6 14.Be4 Ra7 (14...c6 15.Rab1+–) 15.Rad1 (15.Bb7 Rb7 16.Rfd1 Qc8+–) 15...Qe8 (15...Be4 16.Qe4 Qc8 17.Qd3+–) 16.Bb7 Rb7 17.Qe4 (17.Qd3 c6+–) 17...Ra7 (17...c6 18.Qd3+–) 18.Nd2 (18.Qd3 c6+–) 18...Nd7 (18...c6 19.bc6 Qc6 20.Qd3+=) 19.f4 ef4 20.ef4 f5 21.Qe6 Rf7 22.Rde1 Nf8 23.Qe2 (23.Qd5 Qa8 24.Qa8 Ra8+–) 23...Qd8 (23...Qd7 24.d5+–) 24.Nf3 Ra8 (24...Bf6 25.d5+–) 25.d5 Bf6 26.Qf2 (26.Bf6 Qf6 27.Qe3 Nd7+–) 26...Bb2 27.Qb2 h6 28.Qf2 Re7 (28...Qf6 29.Re3+–) 29.Nd4 Re1 30.Re1 Qf6 31.Nc6 Kh8 (31...Nd7 32.Re6 Qa1 33.Qf1 Qa2 34.Rg6 Kh7 35.Re6+–) 32.h3 (32.Re7 Qa1 33.Qe1 Qe1 34.Re1 Kg7+–) 32...Nd7 (32...Rc8+–) 33.Re6 Qa1 34.Kh2 Nf6 35.Ne7 Rg8 (35...Qc3 36.Ng6 Kh7+–) 36.Qh4 Nh7 (36...Kg7 37.Qg3 Kh7 38.Ng8 Ng8 39.Qg6 Kh8 40.Qf5 Qg7+–) 37.Ng6 Rg6 38.Rg6 (38.Rg6 Qg7 39.Rg7 Kg7 40.Qe7 Kg6 41.Qc7+–) 1–0. Janek – Bbg, internet free game, 2017.

4.Bb2 d6 5.c4 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 e5 5.c4 b6).

4.Bb2 d6 5.Bc4 Nf6 6.Nc3 Be7 (6...d5 7.Bb3=) 7.Qf3 Ra7 8.Qg3 0–0 9.f4 ef4 10.Qf4 Be6 11.Bd3 Nbd7 12.Nf3 Nc5 Black prepares a4 13.Be2?? (13.Nd4 Nd3 14.cd3 Rb7+=) 13...a4 (better is 13...Nh5 14.Qd4 Bf6–+) 14.a3= Re8 15.Ng5 Bd7 16.0–0 h6 17.Nge4 Nce4 (17...Ne6!? 18.Qf3 Ra5+=) 18.Ne4+/– Ne4?? (better is 18...d5 19.Nf6 Bf6 20.Bf6 Qf6 21.Qf6 gf6 22.Rf6 Ra5+/–) 19.Qf7 (19.Qf7 Kh7 20.Qg7; 19.Qe4?! Bh4 20.Qf3 Be6+=) 1–0. mikebaldini (1675) – silhouet2003 (1670), gameknot.com, 2014.

4.Bb2 d6 5.Nf3 c5 (5...Nf6 6.Be2=) 6.bc6+= Nc6 7.Bb5 Bd7 8.0–0 Nf6 9.d4 e4 10.Nfd2 Be7 (10...d5!?=) 11.c4+= Nb4 12.Bd7 Qd7 13.f3 (13.Nc3 Rc8+=) 13...ef3= 14.Qf3 Nd3?? (better is 14...Rc8 15.a3 Nc2+=) 15.Qa8+– Bd8 16.Rf6! gf6 (16...0–0 17.Rf3 Nb2 18.Nc3+–) 17.Qe4 Ne5 18.de5 de5 19.Be5! fe5 (19...f5 20.Qd4 (20.Bh8?! fe4 21.Bd4 f5+–) 20...Rg8 21.Nc3+–) 20.Qe5 Be7 21.Qh8 Bf8 22.Nc3 Qd2 23.Qe5 Be7 24.Nd5 Qd5 25.cd5 Kd7 26.Rf1 Ke8 27.d6 Kf8 28.Qe7 .Kg7 29.Qf6 Kg8 30.Qf7 (30.Qf7 Kh8 31.Qf8#) 1–0. Rosner,Dirk (2175) – Tortoza,Carlos, CiF, 2006.

4.Bb2 h5 5.Be5+– f6 (5...d5 6.Nf3+–) 6.Bb2+– Bc5 (6...Bb7 7.Nf3+–) 7.Be2 (7.d4 Be7+–) 7...h4 8.Bh5 (8.d4 Bd6+–) 8...Kf8 9.Qf3 (9.d4 Bd6+–) 9...c6 10.Nh3 (10.d4 Bd6+–) 10...d5+– 11.Nf4 g6?? (better 11...Ne7+–) 12.Ng6+– Kg7 13.Nh8 Kh8 14.Bf7 (better 14.bc6 Ra7 15.Bg6 Nc6 16.Qh5 Kg7 17.Nc3+–) 14...Nh6 (14...Kg7 15.Qh5 Ne7+–) 15.Bf6 Kh7 16.Bd8 Bg4 17.Qf6 Nd7 18.Qg6 Kh8 19.Qh6 1–0. GuestHSWY – GuestWJXP, freechess.org, 2018.

3.e3 Nf6

4.Be2 g6 5.Bb2 Bg7 6.Bf3 c6 7.c4 0–0 8.Ne2 d5 9.Na3 (9.bc6 Nc6 10.Bf6 Bf6=) 9...Qd6 10.Qb3 e5 11.bc6 e4 (worse is 11...Nc6 12.cd5 (12.Qb6? Rb8 13.Nb5 Rb6 14.Nd6 Rb2 15.Bd5 Nb4–+) 12...a4 13.Qb6+=) 12.Nb5 Qc6 13.Ned4 dc4 14.Nc6 (14.Qc2!? Qd7 15.Be2+=) 14...cb3–/+ 15.Ne7 Kh8 16.Be2 Be6 17.ab3 Bb3 18.0–0 Nbd7 19.Nc6 Nc5 20.Nbd4 Rfc8 21.Nb3? (better is 21.f3–/+) 21...Nb3–+ (21...Rc6?! 22.Nd4 Rc7 23.f3–/+) 22.Ra3 Nd2 23.Rd1 Rc6 24.Rd2 Ne8 25.Bg7 Kg7 26.Bb5 (26.Ra1 h6–+) 26...Rc1 27.Bf1 b5 28.g3 b4 (28...b4 29.Ra4 Nc7–+) 0–1. Szkodnikow_i_ofiar – PeterRs, ChessWorld.net, 2015.

4.Qf3 c6 5.bc6 Nc6 6.d4 (6.Bb2 Bb7=) 6...Rb8 7.Ba3 (7.c4 e5=) 7...e6 (7...b5 8.Bc5=+) 8.c4 (8.Bf8!? Kf8 9.c3=) 8...Ba3 9.Na3 0–0 10.Bd3 d5 11.cd5 Nd5 (11...Nb4 12.Bb5=+) 12.Ne2 Ncb4 13.Be4 (13.Bb5 Bb7 14.Qg3 Qc7=+) 13...Bb7 14.Qh3 h6 15.Ng3? (better is 15.0–0!?=+) 15...Nc3 (better is 15...Ba6 16.Ne2 Be2 17.Bd5 Bd3–+ (17...ed5?! 18.Ke2 Rc8 19.Rhb1–/+; < 17...Nd5 18.Ke2 Nc3 19.Kd3–+)) 16.0–0?? (better is 16.Bb7 Rb7 17.0–0–/+) 16...Be4 17.Ne4 Ne4 18.Qg4 (18.Nb5 Rc8–+) 18...Nf6 (18...Nc3 19.Nb1 Nca2 20.Qe2–+) 19.Qh4 (19.Qe2 Qd5–+) 19...Nbd5 (19...Qd5 20.Rfe1–+) 20.g3 (20.Nb5 a4–+) 20...Rc8 21.Nb5 Rc2 22.a4 Nh7 (22...Qd7 23.Na3 Rb2 24.Nc4–+) 23.g4 (23.Qd8 Rd8 24.Rac1–+) 23...Qh4 (24.Ra3 Qg4 25.Kh1 Qf3 26.Kg1 Ng5 27.h3 Nh3 28.Kh2 Nf6 29.Rg1 Qf2 30.Kh3 Qh2#) 0–1. slavisa3 – ontherooks, Live Game Caissa's Web, 2004.

4.Nf3 d6 =.

3.e3 h5

4.Bb2 d5 5.Be2 Qd6 6.Bh5 (6.c4 e5+=) 6...g6?? (better 6...Nd7+=) 7.Bh8+– (7.Bh8 gh5 8.Qh5+–) 1–0. GuestVMTQ – GuestKSTB, freechess.org, 2016.

4.Qf3 Ra7 (4...d5 5.e4=) 5.a4 (5.d4 Nf6+=) 5...Bb7 6.Qd1 (6.e4 Nf6 7.Nc3 d5 8.ed5 Nd5=) 6...Ra8 (6...h4 7.Bb2=) 7.Nf3 g6 (7...h4 8.Be2=) 8.Bb2 (8.Bc4 d5 9.Bb2 Nf6 10.Bf6 ef6+=) 8...Rh7 (8...Nf6 9.Bc4+=) 9.c4 (9.Bc4 e6+–) 9...e6 (9...Bg7 10.Bg7 Rg7 11.Be2+=) 10.Nc3 (10.Be2 Qe7+–) 10...f6 (10...Nf6 11.Be2+–) 11.Be2 (11.d4 f5+–) 11...Rh8 (11...h4 12.Qc2 f5 13.h3+–) 12.0–0 Bb4 13.Nh4 (13.Qc2 Rh6+–) 13...Kf7 (13...Rh6 14.Bf3 c6 15.bc6 Nc6 16.Rb1+–) 14.f4 (14.Bf3 Bf3 15.Nf3 Kg7+–) 14...f5 (14...Kg7 15.Bf3 Bf3 16.Qf3+– (16.gf3?! Ne7+=)) 15.Bf3 (15.Na2 Rh6 16.Nb4 Qh4+–) 15...Qh4 (15...Bf3 16.Qf3 c6 17.Na2+–) 16.Bb7 Ra7 17.Bf3 (17.Na2 Nf6 18.g3 Qh3+–) 17...Rh7 (17...Nf6 18.Na2+–) 18.Ne2 (18.Na2 Bf8+–) 18...Nh6+– 19.g3 (19.Rc1 Ng4 20.h3 Nf6+–) 19...Qd8 20.Nd4 (20.d3 h4+–) 20...h4+= 21.g4 (21.gh4 Ke8 22.Qe1+–) 21...Ke8 (better 21...fg4!? 22.Bg2 Nf5=) 22.g5+– Nf7 23.Kh1 (23.Nc2 e5+–) 23...Nd6 (23...Qe7 24.Nc2+–) 24.Qc2 (24.d3 Bc5+–) 24...Qc8 (24...e5 25.fe5 Nf7 26.e4+–) 25.Qd3 (25.d3 Kf8+–) 25...h3 (25...e5 26.fe5 Nf7 27.Nf5 gf5 28.Qf5+=) 26.Nc2 Qd8 (26...Ne4 27.Nb4 ab4 28.Qd4+–) 27.Nb4 ab4 28.Bf6 Qc8 29.Qb3 (29.Rfb1!? Kf7+–) 29...c5 30.bc6! Nc6 (30...Nc6 31.d3 Combination; 30...dc6 31.Qb4 Combination) 31.d4 (31.d3 Kf8+–) 31...Na5+– 32.Qb4 Nac4 33.Rfc1 Rc7 34.Be5 Ne5 35.Rc7 (35.de5 Rc1 36.Qe1 Re1 37.Re1 Ne4 38.Ra1 Qc2 39.Rf1 Nf2 40.Kg1 Ng4 41.Be2 Qe2 42.Rf2 Qf2 43.Kh1 Qh2) 35...Qc7 36.de5 (36.fe5?! Nf7 37.Rg1 Qd8=) 36...Ne4 37.Be4 fe4 38.Qb2 (38.Qb3 Kf7+–) 38...Qc6 39.Rc1 (39.Qc1 Rf7+–) 39...Qa4+= 40.Qb6 (40.Rb1 Qc4=) 40...Qa2= 41.Rc8 Kf7 42.Qb5 (42.Qb5 Qg2) 1–0. DEFFM – GuestYBWW, freechess.org, 2016.

3.e4 Bb7

4.Nc3 g6 5.d4 Bg7 (5...Nf6 6.e5 Nd5 7.Nd5 Bd5 8.Ne2+=) 6.Nf3 Nf6 7.e5 Nd5 8.Nd5 (8.Na4 e6+=) 8...Bd5+= 9.c4 Bb7 10.Bd3 (10.Be2 d6 11.Bf4 0–0=) 10...0–0 11.0–0 d6 12.Qe2 c5 (12...Nd7!?=) 13.Be4 (13.Bg5 f6 14.ef6 ef6 15.Qe6 Rf7+=) 13...Qc7 (13...Be4 14.Qe4 Nd7 15.Bg5+=) 14.dc5 (14.Bb7 Qb7 15.dc5 dc5+/–) 14...dc5 (14...Be4 15.Qe4 Nd7 16.cd6 ed6 17.ed6 Qd6 18.Bf4+/–) 15.Rb1 (15.Bf4 Ra7+/–) 15...e6 16.Bf4 Nd7 (16...Rd8 17.h3+/–) 17.Rbd1+– Ra7 18.Bb7 Rb7 19.Rfe1 (19.Rd6 h6+–) 19...Re8 20.Rd6 Nb8 (20...Bf8!? 21.Rd3 Be7+–) 21.Red1 Bf8 22.R6d3 h6 23.Qe3 Kh7 (23...g5 24.Bg5 hg5 25.Qg5 (25.Ng5 Bg7 26.Qe4 Qe5 27.Qb7 Qg5+–) 25...Bg7 26.Rd8 Rd8 27.Rd8 (worse is 27.Qd8 Qd8 28.Rd8 Kh7–/+) 27...Qd8 28.Qd8 Bf8 29.Qc8+–) 24.a4 (better is 24.Nd2 Qc8 25.Ne4 Bg7+–) 24...Qe7? (24...Bg7+–) 25.Ng5 Kg7 (25...hg5 26.Bg5 Qc7+–) 26.Ne4 Rd7 (26...Qh4 27.Nf6 Ree7+–) 27.Bh6 Kh8 28.Nf6 Rd3 (28...Rd4 29.Bf8 Rh4 30.Qg5 Rh5 31.Rh3 Qf8 32.Nh5 Re7 33.Nf6 Qh6 34.Qh6) 29.Rd3 Bg7 (29...Qf6 30.ef6 e5 31.Bf8 g5 32.Qg5 Rf8 33.Rh3) 30.Qh3 Bf6 31.Bg5 1–0. yulio (2000) – zd3nik (1880), gameknot.com, 2014.

4.Nc3 g6 5.Nf3 Bg7 6.Bc4 Nf6 +/–.

4.Nc3 g6 5.Nf3 Bg7 6.d4 d6 7.Bc4 e6 8.0–0 Nf6 9.Re1 0–0 10.Bf4 Nbd7 11.Qd2 Nh5 12.Bg5 Bf6 13.Be3 Re8 14.g4 Ng7 15.Bh6 c6 16.bc6 Bc6 17.a4 Rc8 18.Ba6 Ra8 19.Bb5 Qc7 (19...Rc8 20.Rab1+=) 20.Re3 Rac8 (20...Rac8 21.g5 Be7+=). pcmvr – wvmaniac, net–chess.com, 2020.

4.Nc3 g6 5.Nf3 Bg7 6.d4 d6 7.Bd3 Nd7 8.Be3 Ngf6 9.0–0 Ng4 10.Bf4 e5 11.Bg5 f6 (11...Qb8 12.d5+=) 12.Bc1 ed4 (12...Qc8!?+/–) 13.Nd4+– Nge5 (better is 13...Nde5 14.f3 Nd3 15.cd3 f5+–) 14.Ne6 Qe7 15.Nc7 Kf7 16.Na8 Ba8 17.Bb2 Nc5 18.Re1 Rc8 19.Bf1 a4 20.f4 a3 21.Ba3 Ned7 22.Bc4 Kf8 23.Nd5 Bd5 24.Qd5 Ke8 25.Qg8 Qf8 26.Qh7 Kd8 27.Qg6 f5 28.Rad1 Ne4 29.Rd6! Nd6 30.Bd6 (30...Rc4 31.Bf8 Bf8 32.Re8 Kc7 33.Rf8 Nf8 34.Qf7 Nd7 35.Qc4 Kd6 36.Qc6 Ke7 37.h3+–) 1–0. Trkn – guest1065, ICC, 2004.

4.d3 c5 5.a4 (5.Nf3 Nf6+=) 5...d5 (5...e6 6.Nc3=) 6.ed5+= Qd5 7.Nf3 Nf6 8.c4 (8.Be2!?+=) 8...Qd6=+ 9.Bb2 e6 10.Nbd2 Be7 11.Be2 0–0 12.0–0 Nbd7 13.Ng5 h6 (13...Rad8 14.Nge4 Qf4 15.Bf3=+) 14.Ngf3 Rad8 15.Qc2 Ng4 (15...Qf4 16.Rad1=+) 16.Ne4 Be4 (16...Qf4!?=+) 17.de4= Bf6 18.Rad1 Qc7 19.h3 (19.Bc1 Nde5 20.Ne5 Ne5+=) 19...Nge5 20.Nh2 Ng6 21.Bc1 Nde5 (21...Nf4!?=) 22.f4+= Nd7 23.e5 Nde5 (better is 23...Bh4!?+=) 24.fe5+– Be5 25.Nf3 Bg3 26.Bd3 Nf4 27.Be4 f5 28.Bc6 g5 (28...e5 29.Bb2 e4 30.Ne1+–) 29.Bb2 (29...g4 30.hg4 fg4 31.Ne5 Rd1 32.Qd1+–) 1–0. Hermann,H – Wartig,Wolfgang, corr SOK–90–55, 1990.

4.d3 d6 5.f4 Nd7 6.Nf3 e5 7.Be2 Ngf6 (7...ef4!? 8.Bb2 d5 9.ed5 Ngf6=) 8.0–0+= g6 9.c3 Bg7 10.fe5 de5 11.Qe1 0–0 12.Qh4 Ne8 13.Qh3 Nc5 14.Bh6 (14.Be3+=) 14...Bh6 (14...Bc8!? 15.g4 f6= (worse is 15...Nd3 16.Rd1+/–)) 15.Qh6+= Qe7 (15...Nd3?? 16.Ng5 Qg5 17.Qg5+–) 16.d4 Ne4 17.Ne5 N8d6 18.a4 f6 19.Ng4 (19.Nf3 Ng3 20.hg3 Qe2+=) 19...Ng5?? (better is 19...Ng3! 20.hg3 Qe2–/+) 20.Bd3= f5 21.Ne5 Ngf7 22.Nf7 Qf7 23.Nd2 Rae8 24.Rf2 Qg7 25.Qg7 Kg7 ½–½. Meynard,Thibault (2265) – Sanchez,Nicolas (2255), FRA–chT2 South, 2009.

4.d3 e5 5.Bb2 d6 6.Nf3 Be7 7.Nbd2 Nf6 8.Be2 Nbd7 9.c4 0–0 10.0–0 h6 11.Ne1 Nc5 12.f4 ef4 13.Rf4 g5 (better is 13...Ne6!? 14.Rf1 c6+=) 14.Rf1+= Ne6 15.Nef3 Ng4 (15...Nd7!?+=) 16.Ng5!+/– Ne3 (16...Ng5 17.Bg4 Discovered attack; 16...Bg5 17.Bg4 Discovered attack; 16...hg5 17.Bg4 Discovered attack) 17.Ne6 fe6 18.Rf8 Bf8 19.Qe1 Qg5 20.Qf2 Bg7 21.Bg7 Kg7 22.Nf3 Qf6?? (better is 22...Qc5+–) 23.Rb1 (better is 23.Rc1 Ng2 24.Kg2 e5+–) 23...Ng4 (23...Nc2 24.Bf1 Na3+–) 24.Qg3 h5 25.h3 1–0. tightfist (2385) – attasantotjia (2550), net–chess.com, 2014.

4.d3 e5 5.Be3 Nf6 6.c4 Bb4 7.Nd2 0–0 8.Be2 Qe7 9.Nh3 Ne8 (9...Bc3 10.Rc1 Bb4 11.0–0=) 10.0–0 Bd2 (10...a4 11.f4=) 11.Bd2 (11.Qd2 Nd6+=) 11...d6 12.Bg4+= g6 13.Bh6+/– Ng7 14.f4 f5 15.ef5 gf5 16.Bh5 Nd7 17.Bg5 Qe6 18.fe5 de5 19.Re1 Nh5= 20.Qh5 Qg6 21.Qg6 hg6 22.Rad1 Rfe8 23.Re3 f4 24.Ree1 f3 25.gf3+= Bf3 26.Rd2 Rf8 27.Rf1 Rf5= 28.Rdf2 Bg4 29.Rf5 gf5 30.Nf2 Bf3 31.Re1 Kf7 32.Re3 Bh5 33.Kg2 Re8 34.Rg3 f4=+ 35.Rh3 Kg6 36.Ne4 a4 37.a3 Rh8 38.Kf2 Kf5 39.Be7 Kg6 (40.Ke1 Re8=). Ortner,H (1820) – Trifunovic,Dusan (2030), Raika op 5th, 1996.

4.d3 e5 5.Nf3 Bc5 =.

4.d3 e5 5.Nf3 d6 6.Be2 g6 (6...Be7 7.0–0=) 7.0–0 Bg7 8.Nc3 Ne7 9.d4 Nd7 10.Be3 0–0 11.Bc4 h6 12.Re1 Kh7 13.de5 Ne5 14.Qe2?? (14.Ne5 Be5 15.Bd4 c5 16.Be5 de5+/–) 14...f5?? (better is 14...Nf3 15.Qf3 Bc3 16.Bh6 Be1 17.Bf8 Bf2 18.Qf2 Qf8 19.Bf7 Qh6–+ (19...Be4 20.Qh4 Kg7 21.Qe4+=)) 15.Nd4= f4 (15...fe4 16.Ne6 Qd7 17.Ng7 Kg7 18.Ne4=) 16.Ne6 Qd7 (16...f3 17.Qd1 Qd7 18.Nf8 Rf8=+) 17.Bf4+/– (< 17.Nf8 Rf8 18.Bf4 Rf4–+; 17.Nf4?! Nf3 18.Qf3 Bc3=; 17.Ng7? fe3 18.f3 Kg7–+) 17...Rf4? (better is 17...Nc4!? 18.Qc4 Bc3 19.Nf8 Rf8 20.Bh6 Bg7 21.Bg7 Kg7+/–) 18.Nf4+– Rf8 (18...Qg4 19.Ncd5 Nd5 20.Bd5 Qf4 21.Bb7+–) 19.Ne6 Rf6 20.Ng7 Kg7 21.Bd5 Bd5 22.ed5 Nf5 (22...Rf4 23.Qe3 g5+–) 23.f4 Nf7 (23...Nd4 24.Qe4 (24.fe5?! Ne2 25.Re2 de5 26.Re5 Qd6=+) 24...Qg4 25.fe5+–) 24.Ne4 Qe7 (24...Nd8 25.Nf6 Kf6 26.c4+–) 25.Qc4 Qd8 26.Rad1 g5 (26...Ne3 27.Re3 Rf4 28.Rc3+–) 27.Nf6 Kf6 (27...Qf6 28.Re6 Qb2+–) 28.Qc3 Kg6 29.Re6 Kh7 30.Qd3 gf4 31.Qf5 Kg7 32.Rg6 Kf8 33.Qf4 Qe7 (33...Qd7 34.Rf1 Qe8 35.Qf6 Qe3 36.Kh1 Qf2 37.Rf2 Ke8 38.Qf7 Kd8 39.Rg8) 34.Rf1 Ke8 (34...Qe8 35.Qf6 Qe3 36.Kh1 Qf2 37.Rf2 Ke8 38.Qf7 Kd8 39.Rg8) 35.Rg8 Kd7 36.Qf5 Qe6 37.Qe6# 1–0. market (2070) – bh33 (1925), GameColony.com, 2002.

4.d3 Nf6 5.e5 Nd5 6.c4 Nb4 7.a3 e6 8.Ne2 d5 9.ab4 Bb4 10.Bd2 dc4 11.dc4 Bc5 12.Qb3 0–0 13.Qg3 Re8 14.Nbc3 Bb4 15.Bg5 Qd7 16.Bf6 Bf8 17.Nf4 Kh8 18.Nh5 gf6 19.Nf6 Qd4 20.Qg8 1–0. kolya (2045) – kasxsak (1685), GameColony.com, 2002.

4.e5 e6 5.Bb2 f6 6.d4 c6 7.a4 d5 8.Bd3 c5 9.Qh5 g6 10.Bg6 Kd7 11.Bd3 Qe7 12.Nf3 f5 13.0–0 c4 14.Be2 Nh6 15.Ba3 Qf7 16.Ng5 Qh5 17.Bh5 Ba3 18.Na3 Ke7 19.c3 Nd7 20.f4 Rag8 21.Nc2 Rg7 22.Ne3 Nf8 23.Rf3 Bc8 24.Rh3 Ng6 25.Rf1 Nf4 26.Rf4 Rg5 27.Rfh4 Nf7 28.Bf7 Kf7 29.Rh7 Rh7 30.Rh7 Rg7 31.Rg7 Kg7 32.g3 Bd7 33.h4 Be8 34.Ng2 Kh6 35.Nf4 Bf7 36.Kg2 Kg7 37.h5 Kh6 38.Kh3 Kg5 39.Kg2 Kh6 40.Kf3 Kg5 41.Kg2 Kh6 42.Kh3 Kg5 43.Kg2 Kh6 Draw agreed ½–½. Crusader Rabbit (1670) – stampyshortlegs (1805), ChessWorld.net, 2014.

4.f3 d6 5.d4+= Nd7 6.Bd3 e5 7.c3 g6 8.Ne2 Bg7 9.0–0 Ngf6 10.Bg5 h6 11.Be3 Qe7 12.Re1 0–0 13.Qd2 Kh7 14.a4 d5 15.ed5 Nd5 16.Bf2 Qd8 (16...Rad8 17.Nf4=) 17.Na3+= f5 18.Nc4 Re8 19.Ng3 ed4 20.cd4 (20.Re8 Qe8 21.Bd4 Qf8+=) 20...Nb4 21.h4 (21.Re8 Qe8 22.Re1 Qf7=) 21...h5 (21...Nd3 22.Re8 Qe8 23.Qd3=) 22.Re8= Qe8 23.Re1 Qf7 24.Nb2 Nf6 25.Ne2 Nfd5 26.Bc4 Qf8 27.Bg3 Bh6 28.Qd1 (28.Nf4 Qd8=) 28...Ne3 (28...Be3 29.Bf2=+) 29.Qb3= Nbd5 30.Nd3 f4 31.Nef4 (better 31.Bf2 Nc4 32.Qc4=) 31...Nc4?? (31...Nf4 32.Bf4 Bf4=+) 32.Qc4+– Qg8? (32...Bf4 33.Nf4 Qb4+–) 33.Nd5 Bd5 34.Qc7 Bg7 35.Re7 Rc8 (35...Re8 36.Re8 Qe8+–) 36.Rg7! Qg7 37.Qc8 Qd4 38.Nf2 (better 38.Kh2 Qg7 39.Be5+–) 38...g5 (38...Bb3 39.Qc7 Qg7 40.Qb6+–) 39.hg5 (39.Qf5 Kg8 40.Be5 Qe5 41.Qe5 Bb3 42.Qg5 Kf8 43.Qh5 Kg7+–) 39...h4 (39...Bf7 40.Qb8 Qa1 41.Kh2+–) 40.Qc7 (better 40.Qf5 Kg8 41.Be5 Qe5 42.Qe5 Bf3 43.g6 Bd5 44.Ng4 Kf8 45.Qf6 Ke8 46.Qd6 h3 47.Nf6) 40...Kg8 (40...Qg7 41.Qg7 Kg7 42.Be5 Kg6+–) 41.Be5 (41.Be5 Kf8 42.Bd4 h3 43.g6 h2 44.Kh2 Ke8 45.Bf6 Bf3 46.Qe7) 1–0. Swicarz,Maciej (2310) – Kozlowski,Tomasz (1855), Wroclaw Poland, Adolf Anderssen Memoria, 2018.

4.Nf3 d6 5.Nc3 Nd7 (5...Nf6 6.Qe2+=) 6.Bc4 e5 7.d4 Qe7 (7...Ngf6!?+=) 8.0–0 0–0–0 9.Ng5 Nh6 10.Nd5 Bd5 11.Bd5 ed4 12.Qd4 Nc5 13.Re1 f6 14.Be6?? (better is 14.Nf3+/–) 14...Ne6–/+ 15.Qd5 Ng5 (15...Nd4! 16.c3 Nb5 (< 16...fg5 17.Bg5 Qg5 18.Qg5=) 17.Qb5 fg5 18.Bg5 Qe5 19.Qa6 Kd7 20.Bd8 Kd8 21.Qa8 Kd7–/+) 16.Qa8= Kd7 17.Qc6 Kc8 18.Bg5?? (better is 18.Qa8 Kd7 19.Qc6 Ke6 20.Qd5 Kd7 21.Qc6=) 18...fg5–+ 19.Rad1 (19.Qa8 Kd7 20.Qc6 Ke6–+) 19...Kb8 20.e5 (20.Qd5 Ng4–+) 20...de5 21.Rd3 Rd3 (21...Nf7 22.Rd8 Qd8 23.Rf1–+) 22.cd3 Nf5 (23.Qd5 Qf6–+) 0–1. gtate (1965) – jparkinson (1830), net–chess.com, 2006.

4.Nf3 Be4!? 5.Nc3 Bb7 =+.

4.Nc3 e5

5.Bb2 Bc5 6.Nf3 Nf6 7.Ne5 Qe7 (7...Be4? 8.Ne4 Ne4 9.Qf3+–) 8.Nd3 1–0. Santamaria Navarro,Floreal (2025) – Brun,Jorge Humberto (1995), Argentina – Spain, 2005.

5.Nf3 Nf6 6.Bc4 Bb4 +=.

5.Nf3 Nf6 6.Ne5 Bb4 7.Bd3 Qe7 8.Ng4 Ne4 9.0–0 (9.Ne4 d5 10.Bb2 de4+=) 9...d5 10.Ne3 (10.Bb2 0–0+=) 10...Bc3 (10...Nc3 11.dc3 Bc3 12.Nf5+–) 11.dc3+= Nd7 (11...0–0 12.Qg4 g6 13.Nf5+–) 12.Bb2 (12.f3 Nc3 13.Qe1+=) 12...0–0–0 13.Qg4 Kb8 14.c4 dc4 15.Be4 (worse 15.Bc4 Ne5 16.Be5 Qe5=+) 15...Be4 16.Rfe1 (16.Bg7? f5 17.Nf5 Bf5 18.Qf5 Qg7–+; worse 16.Qg7 Rhg8 17.Qc3 Qg5=+) 16...Rhe8 17.Qg7 (17.Bg7? f5 18.Qg3 f4 19.Qf4 Qg7–+; 17.Nc4?! f5 18.Qg7 Qb4=) 17...Rg8 18.Qd4 Qe6 19.g3 Nc5 20.Qf6 Qh3 (better 20...Qf6 21.Bf6 Rde8=) 21.Be5 (better 21.Rad1!? Rd1 22.Rd1=) 21...Ne6= 22.Rad1 (22.Red1 Rc8 23.f3 Rg6–/+) 22...Rc8=+ 23.Rd4 (23.f3 Rg6 24.Qe7 Bf3–/+) 23...Rg6–/+ (23...Nd4 24.Qb6 Bb7 25.Qd4+=) 24.Re4 (24.Qf7?? Ng5 25.Bc7 Kb7 (25...Rc7?! 26.Qf8 Kb7 27.Re4 Ne4 28.Qf3=) 26.Bf4 Nf7 27.Re4 Ng5 28.Bg5 Rg5–+) 24...Rf6 25.Bf6 Qh5 26.Nc4 (26.Rc4 Qf3 27.Bh4 Rg8–/+) 26...Qf5–/+ 27.Ne5 (27.Be7 Qb5 28.Ne5 Qb2–/+) 27...Nc5 28.Rf4 (28.Rc4 Kb7 29.Be7 Re8–+) 28...Qc2 29.Be7 Qd2 30.Ra1 (30.Rf1 Qa2 31.Bc5 bc5 32.Rf7 a4 33.Nd7 Ka7 34.Rh7 a3 35.b6 cb6 36.Nc5 Ka8–+) 30...Qb2 31.Re1 Re8 32.a4 (better 32.Rf7!? Qa2 33.Rh7–+) 32…Kb7–+ (32...Kb7 33.Bc5 bc5–+ (33...Re5?! 34.Be3–/+)) 0–1. calabuig (2060) – yzerman123 (2245), gameknot.com, 2015.

5.Nf3 Nf6 6.Ne5 Bb4 7.Bd3 Qe7 (7...0–0 8.0–0 Re8 9.Ng4 Bc3 10.dc3 Ne4 11.Qf3+=) 8.Ng4 Ne4 9.0–0 d5 10.Ne3 Bc3 11.dc3 Nd7 12.Bb2 (12.f3 Nc3 13.Qe1 Qc5+=) 12...0–0–0 13.Qg4 (13.Re1 Ne5+=) 13...Kb8 14.c4 (14.Qg7 Rhg8 15.Qh6 Ndc5=) 14...dc4 (14...Ndf6 15.Qf4 g5 16.Qe5 Qe5 17.Be5+=) 15.Be4 (worse is 15.Bc4 Ne5 16.Be5 Qe5+=) 15...Be4 16.Rfe1 (16.Bg7? f5 17.Qf4 Qg7–+; 16.Qg7?! Rhg8 17.Qc3 Qg5+=) 16...Rhe8 17.Qg7 (17.Bg7? f5 18.Qg3 f4 19.Qf4 Qg7–+; 17.Nc4 h5 18.Qe2 Qb4 19.Bg7 Bg2 20.Qe8 Re8 21.Re8 Kb7–+) 17...Rg8 18.Qd4 Qe6 19.g3 Nc5 20.Qf6 Qh3 (20...Qf6 21.Bf6 Rde8+=) 21.Be5 (better is 21.Rad1!? Rd1 22.Rd1+=) 21...Ne6+= 22.Rad1 (22.Rf1 Kb7 23.f3 Rd2–+) 22...Rc8 23.Rd4 (23.f3 Rg6 A) 24.Qf7?? Ng5 25.Bc7 Kb7–+ (worse is 25...Rc7 26.Qf8 Kb7 27.fe4–+); B) 24.Qe7 Bf3 25.Rd2–/+) 23...Rg6–/+ (23...Nd4 24.Qb6 Bb7 25.Qd4+=) 24.Re4 (24.Qf7?? Qh2 25.Kf1 Ng5 26.Bc7 Kb7 27.Re4 Qh3 28.Ke2 Nf7–+) 24...Rf6 25.Bf6 Qh5 26.Nc4 Qf5 27.Ne5 (27.Be7 Qb5 28.Ne5 Qb2–/+) 27...Nc5 28.Rf4 (28.Rc4 Kb7 (28...Qf6?! 29.Rc5 Qd6 30.Rc4+=) 29.Be7 Re8–+) 28...Qc2 29.Be7 Qd2 (29...Kb7 30.Rf7 Qa2 31.Bc5 bc5–+) 30.Ra1? (better is 30.Rf1!?–/+) 30...Qb2–+ 31.Re1 Re8 32.a4 (better is 32.Rf7!? Qa2 33.Rh7–+) 32...Kb7–+ (32...Kb7 33.Bc5 bc5–+ (33...Re5?! 34.Re5 Qa1 35.Kg2 Qe5 36.Be3–/+)) 0–1. calabuig (2060) – yzerman123 (2245), gameknot.com, 2015.

5.Qh5 Bd6 6.Bc4 Qe7 +=.

5.Qh5 g6?? (better 5...Qe7=) 6.Qe5+– Qe7 7.Qh8 Nf6 8.d4 (better 8.d3 d5 9.Nge2 Nbd7+–) 8...Be4 (8...Ne4 9.Ne4 Be4+–) 9.Bg5 Bg2 10.Kd2 Qd6 (10...Bh1 11.Bf6 Qe6+–) 11.Re1 Kd8 12.Bg2 Qd4 13.Kc1 (13.Kc1 c6 14.Bf6 Qf6 15.Qf6 Kc7 16.Re8 Na6 17.Ra8 Nb4 18.Qd8 Kd6 19.Qf8 Ke6 20.Bh3 Kf6 21.Ne4 Ke5 22.Qd6 Ke4 23.Re8) 1–0. pcmvr – bolu, net–chess.com, 2020.

4.Nc3 e6

5.a3 Nf6 6.e5 Ne4 7.Ne4 Be4 8.d3 Bb7 9.Nf3 Be7 (9...d6 10.d4=) 10.d4 d6 (10...0–0 11.Bd3=) 11.ed6 cd6 12.Bd3 Nd7 13.0–0 0–0 14.Qe2 Rc8 15.Bf4 Nf6 16.Rfc1 Re8 17.c3 (17.Re1 a4=) 17...h6 (17...e5 18.de5 de5 19.Ne5+=) 18.a4 (18.Be3 d5=) 18...Rc7 (better is 18...e5!? 19.de5 de5 20.Be5 Bd6 21.Bf6 Qf6–/+) 19.c4= Qa8 20.Ne1 Be4 (20...Nd7 21.Be3=) 21.f3 Bh7 22.Bh7 Nh7 23.Kh1 Bg5 24.Bg5 Ng5= 25.c5 bc5 26.dc5 dc5 The passed pawn on b5 will quickly become a dangerous weapon 27.Nd3 e5 28.Nc5 e4 29.f4 Ne6 30.Ne6 Rc1 31.Rc1 Re6 ½–½. Van Bommel,Ton – Istomin,Sergei, L2.2000.0.00006, 2000.

5.Nf3 Bb4 6.Bb2 Nf6 7.e5 Nh5 8.Na4 Be7 9.g3 d6 10.Bg2 de5 11.0–0 Nd7 (11...e4 12.Nd4 Nf6 13.d3=+) 12.Be5 Ne5 13.Ne5 Bg2 14.Qh5 Threatening mate... how? 14...g6 15.Ng6 fg6 16.Qe5 Bf6 17.Qe6 Kf8 18.Kg2 Ba1 19.Ra1 Kg7 (19...Qd2!? 20.Qe5 Kg8=) 20.Nc3 Re8 (20...Qd2?? 21.Qe7 Kh6 22.Qh4 Kg7 23.Rd1 Qd1 24.Qe7 Kh6 25.Nd1+–) 21.Qc4 Qe7 (21...Qd2 A) 22.Qc7?! Kf8 23.Rd1 Qg5+– (23...Qc2?? 24.Rd7 Qf5 25.Rh7+–); B) 22.Rd1 Qg5 23.Rd7 Re7 24.Ne4+–) 22.f3 Rad8 23.Ne4 g5 24.d3 Qe5 25.Rf1 (25.c3 c5+=) 25...Rd4= 26.Qc6 Re6 27.Qb7 Rd7 28.a4 Qd4 29.f4 (worse 29.Ng5 Re2 30.Kh1 Qa4=+) 29...Qa4 30.f5 Re4 (30...Qc2?? 31.Rf2 Qf2 32.Kf2+– (worse 32.Nf2 Rf6 33.Qc8 Rff7+–)) 31.Qe4 ½–½. pcmvr – marekt, net–chess.com, 2020.

5.Nf3 Nf6 6.e5 Nd5 7.Nd5 Bd5 8.Be2 d6 9.0–0 Nd7 10.c4 Bb7 11.d4 de5 12.de5 Bc5 13.Bg5 f6 14.ef6 gf6 15.Bh6 Qe7 16.Nd2 0–0–0 17.Bf3 Rhg8 18.Bb7 Kb7 19.Ne4 Kb8 20.Qe2 Ba3 21.Ng3 Bd6 ½–½. Blitzmich – peze, playchess.de, 2003.

5.Nf3 Nf6 6.e5 Nd5 7.Nd5 Bd5 8.Be2 d6 9.0–0 de5 10.Ne5 Nd7 (10...Bd6 11.d4 Qf6 (11...Qh4 12.f4 0–0 13.c4 Be4 14.Be3 a4 15.Bf3 Bf3 16.Qf3 Ra5+= 0.44) 12.Ng4 Qg6 13.c4 Be4 14.Bf3 0–0 15.Re1 Bf3 16.Qf3 Nd7+= 0.37; 10...Bb4 A) 11.Bb2 f6 (11...Qg5 12.Bf3 0–0 13.c4 Bf3 14.Qf3 Ra7 15.d4 Qd2 16.Rab1 Bd6+= 0.59; 11...0–0 12.c4 Bb7 13.Bf3 Bf3 14.Qf3 Nd7 15.Nc6 Qh4 16.d3 Bd6+= 0.41) 12.c4 Bg2 13.Bh5 g6 14.Ng6 hg6 15.Bg6 Ke7 16.Kg2 Rg8= –0.22; B) 11.a3 Bd6 12.d4 Qf6 13.Ng4 Qg6 14.c4 Be4 15.Bf3 0–0 16.Re1 Bf3+= 0.37; 10...Qf6 11.d4 Bd6 12.Ng4 Qg6 13.c4 Be4 14.Bf3 0–0 15.Re1 Bf3 16.Qf3 Nd7+= 0.37) 11.Nd7 (11.d4 Ne5 12.de5 Bc5 13.Bf4 Qh4 14.Qd2 0–0 15.c4 Bb7 16.Bg5 Qd4= 0.00) 11...Qd7 12.c4 Bb7 (12...Be4 13.d3 Bf5 14.d4 0–0–0 15.Be3 e5 16.de5 Qe6+= 0.34) 13.Bf3 (13.d4 Rd8 (13...Bd6 14.Be3 Qe7 15.Bd3 Qh4 16.f4 Be7+= 0.44) 14.Be3 Bb4+= 15.Bf3 Bf3 16.Qf3 0–0+= 0.37) 13...0–0–0 (13...Bf3 14.Qf3 Rd8 15.d4= (15.Bb2 Qd3 16.Qc6 Qd7= 0.00) 15...Qd4 16.Bg5 Be7+= 0.47) 14.Bb7+= Kb7 15.Qf3 Kb8 16.Bb2 f6 (worse is 16...Qd2 17.Rad1 Qg5 18.Bf6 (18.Qf7?! Bd6+/–) 18...Qf6 19.Qf6 Rd1 20.Qf7+–; 16...a4= 0.25) 17.d4 h5 18.Rac1 h4 19.h3 Rh6 20.a4 f5 21.c5 Qd5 22.cb6 cb6 23.Qf4 Bd6 24.Qg5 Rd7 25.Rc6 Ka7 26.Rfc1 f4 27.Qg4 Rf6 28.f3+/– Rh6 29.Kh1 Kb7 30.Kh2 g5 31.Rc8 Rhh7 32.R1c6 Rdg7 33.Re8 Attacking the backward pawn on e6 33...Re7 34.Rg8 Rhg7 35.Rd8 Rd7 36.Rcc8 Bb4 (36...Bb4 37.Rb8 Ka7 38.Ra8 Qa8 39.Ra8 Ka8 40.Qe6 Ka7+/–). Hansen,Marco (2290) – Gnuechtel,Andreas (2255), CiF, 2009.

5.Nf3 Nf6 6.e5 Nh5 7.d4 Bb4 8.Qd3 f6 9.a3 Bc3 10.Qc3 0–0 11.Be2 fe5 12.de5 Nf4 13.Bf4 Rf4 14.Rd1 Ra7 15.Nd4 Bd5 16.Qg3 Qf8 17.0–0 c5 18.bc6 Nc6 19.Nb5 Ra8 20.Nc7 Nd4 21.Bd3 Rc8 22.Nd5 ed5 23.Qh3 h6 24.Qd7 Rd8 25.Qc7 Re8 26.c3 Ne6 27.Qc6 Ng5 28.Qd5 Kh8 29.Qd6 Qg8 30.Qb6 Re5 31.Rfe1 Rf6 32.Qc7 Re1 33.Re1 Qf8 34.h4 Nh7 35.Rb1 Rf7 36.Qa5 Rf2 37.Qe5 Qf7 38.Qe4 Nf8 39.Rb7 Qf4 40.Qe7 Qg3 41.Qg7 Qg7 42.Rg7 Rf4 43.Ra7 Rh4 44.a4 Ne6 45.a5 Ra4 46.a6 Nc5 47.Bf1 Ra1 48.Rc7 Na6 49.Rc6 Nb8 50.Rc8 Kg7 51.Rb8 Ra7 52.c4 Re7 53.g3 Rc7 54.Kf2 Rc6 55.Bd3 Kf6 56.Ke3 Ke7 57.Rh8 Kd7 58.Bf5 Kc7 59.Kd4 Rf6 1–0. COMP – COMP, blitz 25', 2001.

3.e4 e5

4.Bb2 d6 5.c4 Be6 6.Nc3 Nd7 7.Be2 Be7 8.Nf3 Ngf6 9.0–0 h6 10.d3 c5 11.Nd5 Nd5 12.cd5 Bg4 13.Qb3 a4 14.Qc4 0–0 15.a3 Bf6 16.h3 Bf3 17.Bf3 Qc8 18.Bc3 Bd8 19.Bg4 Qb7 20.f4 f6 21.Be6 Kh8 22.f5 g5 23.Bd2 Re8 24.h4 Nf8 25.hg5 hg5 26.Kf2 Qh7 27.Rh1 Kg7 28.Rh7 Nh7 29.Rh1 Be7 30.Qc1 Rh8 31.Qg1 Nf8 32.Rh8 Kh8 33.Qh2 Kg7 34.Qh5 Nh7 35.Qf7 Black resigned 1–0. nimzo1 – Daz101, ChessWorld.net, 2012.

4.Bb2 d6 5.d4 Nd7 6.de5 Ne5 7.Be5 de5 8.Qd8 Kd8 9.Nd2 Bb4 10.Ngf3 f6 11.Bc4 Ne7 12.0–0 Bd2 13.Rfd1 Bd7 14.Rd2 Kc8 15.Rad1 Bg4 16.Be2 Ng6 17.Ne1 Be6 18.g3 Ba2 19.c4 Bb3 20.Rb1 a4 21.Nc2 Rd8 22.Rd8 Kd8 23.Na1 Ne7 24.Nb3 ab3 25.Rb3 Ra2 26.Bg4 g6 27.Rd3 Ke8 28.Rc3 h5 29.Be6 Re2 30.f3 c6 31.bc6 Nc6 32.Rd3 Nd4 33.Bh3 Ke7 34.f4 Re4 35.fe5 fe5 36.Bg2 Re1 37.Kf2 Re2 38.Kf1 g5 39.Rd4 Rg2 40.Kg2 Draw agreed ½–½. mckenna215 (1995) – stude, ChessWorld.net, 2012.

4.Nf3+= Bb7 5.Bc4 Be4 6.Qe2 +=.

4.Nf3+= d6 5.d4 f6 (5...ed4 6.Bc4+=) 6.Bc4+/– Bg4 (6...c6 7.d5 c5 8.Bd3+/–) 7.de5+– Bf3? (better is 7...c6+–) 8.Qd5 (8.gf3?! Nd7+–) 8...Nd7 (8...Bh5 9.ef6 Nf6 10.Qa8 Nbd7+–) 9.Qf7# (9.gf3?! Ne5 10.Be2 Ne7+=) 1–0. Woschkat,Karl_Heinz – Glennovin, itsyourturn.com, 2000.

3.Nf3 Bb7

4.c4 e6 5.Nc3 Nf6 6.Bb2 Be7 7.e3 0–0 8.d4 d5 (8...Bb4 9.Bd3=) 9.Bd3 Nbd7 (9...dc4 10.Bc4 c6 11.0–0=) 10.cd5 Nd5 11.0–0 N7f6 12.Ne5 Nc3 13.Bc3 Bd6 14.f4 Nd5 15.Bd2 (15.Qh5 g6 16.Qf3 f6=) 15...Nf6 (15...Nf4!? 16.Bh7 Kh7 17.Rf4 Kg8=) 16.Rc1+= h6 17.a4 Bd5 18.Qc2 Rc8 (18...Ba3 19.Rcd1 Qd6+=) 19.e4 (better is 19.Nc6!? Qd7 20.e4 Bc6 21.Qc6+/–) 19...Be4 20.Nc6 (20.Be4 Be5) 20...Bd3=+ 21.Qd3 Qd7 22.Kh1 (22.Ne5 Qe8=+) 22...Nd5=+ 23.f5 ef5 24.Rf5 Qe6 (24...Ne7 25.Ne7 Be7 26.Bf4=+) 25.Re1= Qg6 26.Qh3 (better is 26.Qf3 Nf6 27.Ne5 Be5 28.Rfe5=+) 26...Rce8+– 27.Ref1?? (27.Rd5 Re1 28.Be1 Qe4 29.Ne7 Kh8=+ (< 29...Be7 30.Re5 Qf4 31.Qd3=+)) 27...f6?? (better is 27...Qe6=+) 28.Rd5 Re2 29.Qf3 Rd2 30.Rd6! Kh8? 31.Rd7 Re8 32.Ne7 Qc2 33.h3 Re2 34.Nf5 Re1 35.Re1 Re1 36.Kh2 Qe4 37.Qe4 Re4 38.Ng7 Re3 39.Nh5 Kg8 40.Nf6 Kf8 41.Rc7 Ra3 42.Nd7 Ke8 43.Nb6 Kd8 44.Rd7 Ke8 45.Ra7 Kd8 46.d5 h5 47.d6 Ke8 48.Rh7 Rd3 49.d7 Kf8 50.Rh5 Ke7 51.Rh8 Rd2 52.Re8 (52...Kf6 53.h4+–) 1–0. Czernicki,B – Orlicki,A, Rudnik, 1992.

4.c4 e6 5.e3 Nf6 6.Be2 Be7 7.Bb2 0–0 8.0–0 c5 9.bc6 Nc6 10.Nc3 Rc8 11.Na4 d5 12.Bf6 Bf6 13.Rb1 Attacking the backward pawn on b6 13...Ne5 (13...dc4!? 14.Nb6 Rb8+=) 14.Nb6+/– Rb8 15.c5 Nc6 16.d4 Qc7 17.Qa4 Be7 18.Bb5 f6 19.Nd2 e5?? (better is 19...f5+–) 20.Nd5 (20.Nd5 Qd7 21.Bc6 Bc6 22.Qc6+–) 1–0. forsetinn (2435) – heaterhog (2050), gameknot.com, 2015.

4.d3 c6 5.Nc3 =.

4.d3 g6 5.Bb2 Bg7?? (better is 5...f6+=) 6.Bg7+– Nf6 (6...f6 7.Bh8 Kf7 8.Qd2+–) 7.Bh8 d6 8.e4 Nbd7 9.Be2 Ne5 (9...Kf8 10.Bf6 Nf6 11.0–0+–) 10.Ne5 de5 11.0–0 Qd4 (11...Kf8 12.Bf6 ef6 13.c3+–) 12.c3 Qc5 13.Qa4 0–0–0 14.Bg7 Rg8 15.Bh6 Nd7 (15...g5 16.Qb3 e6 17.Qa3+–) 16.Be3 Qd6 17.Nd2 Nc5 (17...Rd8 18.Nf3+–) 18.Qc4 Ne6 19.d4 ed4 20.cd4 f5 21.Bf4! Nf4 (21...Qf4 22.Qe6) 22.Qg8 Kd7 (22...Qd8 23.Qd8 Kd8 24.Bc4+–) 23.Bf3 Qd4 24.Nb3 fe4 25.Bg4 e6 26.Nd4 Ke7 27.Ne6 (27....Ne6 28.Qe6 Kf8 29.Qf6 Ke8 30.Rad1 Bd5 31.Rd5 c5 32.Rd8) 1–0. market (1925) – NN, GameColony.com, 2002.

4.e3 d5 5.c4 e6 6.Nc3 (6.cd5 ed5 7.d4 Nf6+=) 6...dc4 (6...Nf6 7.cd5 Nd5 8.Bb2=) 7.Bc4 Nd7 8.Bb2 Ngf6 9.0–0 Ne4 (9...Bd6!?=) 10.Ne4+– Be4 11.d3 Bf3 (11...Bb7!?+–) 12.Qf3 (12.gf3?! Rc8+=) 12...Ne5?? (better 12...Ra7+–) 13.Be5+– Rb8 (13...Ra7 14.d4+–) 14.Qc6 Qd7 15.Qc7 (better 15.Bc7 Rc8 16.Qd7 Kd7 17.Bb6 Bb4+–) 15...Qc7 16.Bc7 Rc8 (16...Rb7 17.Be5+–) 17.Bb6 Bb4 18.a3 Bc3 19.Rac1 (19.Rab1 Kd7+–) 19...Bf6 (19...Bb2 20.Rc2 Ba3 21.Ba5+–) 20.Ba5 (better 20.Be6 Rb8 21.Rc8 Rc8 22.Bc8 a4+–) 20...0–0 (20...Bb2 21.Rc2 Ba3 22.b6+–) 21.Bb4 Ra8 1–0. OnlyPolishOpening (1830) – santosmarco, lichess.