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TESTB100 Release 2021-07-21
Send your 1.b4 games to me, please. Thank you! /Marek
Marek Trokenheim's homepage
(c) Marek Trokenheim

1.b4 c6

(...)

2.a3 a6 3.Bb2 e6 4.c4 Nf6 (4...d5 5.cd5 ed5 6.Qc2=) 5.b5 (5.e3!?+= might be a viable alternative) 5...cb5 6.cb5 Be7 (6...ab5 7.Nc3+=) 7.e3 (7.a4 d6=) 7...0–0 (7...ab5 8.Be2=) 8.Nc3 d5 9.Nf3 (9.ba6 ba6 10.Rc1 d4 11.ed4 Qd4=) 9...Nbd7 (9...ab5 10.Bb5 Bd7 11.Nd4=) 10.Rc1 Re8 11.Be2 Nc5 12.0–0 (12.ba6 Na6 13.d4 Qa5=) 12...Nfe4 (12...Bd7 13.ba6 Na6 14.h3=) 13.Na4 (13.Ne4 Ne4 14.ba6 ba6=) 13...b6 (13...Na4 14.Qa4 Bd7 15.Qd4+=) 14.d3 (14.Nc5!? is noteworthy 14...bc5 15.Ne5=) 14...Na4 15.Qa4 Nd6 (15...Nc5 16.Qg4 e5 17.Qg3=) 16.Qg4 (16.ba6 Ra6 17.Qc2 Bd7=) 16...Bf6 (16...f6!?=) 17.Bf6+= Qf6 18.a4 (18.Qb4!? Qd8 19.ba6 Ba6 20.Rc6+=) 18...e5 (18...Qb2 19.Qd4 Qe2 20.Qb6 ab5 21.Qd6 ba4 22.Qa3+=) 19.Qg5 (19.Qb4!? ab5 20.ab5=) 19...Qg5+= 20.Ng5 f6 21.Nf3 (21.Rc6 Rd8 (worse is 21...fg5 22.Rd6 ab5 23.ab5+/–) 22.Nf3 ab5 23.ab5 Ra2=) 21...Bb7 22.Rc7 Rac8 23.Rfc1 Rc7 24.Rc7= Rc8?? 25.Rd7+– e4? 26.de4 de4 27.Nd2 Rc1 28.Bf1 Nb5 29.ab5 Bc8 30.Rd8 Kf7 31.Ne4 Be6 32.Rb8 Rd1 33.Rb6 Bc4 34.Nd6 (34.Nd6 Kg6 35.Nc4 ab5 36.Rb5+–) 1–0. Corluy,H – De Cock,Cesar (1700), Brasschaat op, 2002.

2.a3 e5 (--> 1.b4 e5 2.a3 c6).

2.Ba3 e5 3.e4 =+.

2.Ba3 Nf6 3.Nf3 a5 4.ba5 Ra5 (4...d6 5.Bb4=+) 5.Bb4 h5 6.Nc3 e6 7.Nd4?? c5 8.Nb3?? cb4–+ 9.Nb1?! Rf5 10.g3 Qb6 11.Bh3 Qf2# 0–1. Knights Lady – Checker Man, ChessWorld.net, 2002.

2.Ba3 g6 3.Nc3 Bg7 4.b5 cb5–/+ 5.Nb5 Ba1 6.Qa1 Nf6?? 7.Qe5+/– Na6 8.Nf3 d6?? 9.Bd6 e6?? 10.Nc7 Nc7+= 11.Bc7 Qe7 12.Ng5 h6 13.Qb5?? Nd7 14.Ne4+= 0–0 15.Bf4 Nf6 16.Nf6 Qf6= Do you see the mate threat? 17.Bh6?? Qa1 18.Qb1 Qb1# 0–1. Jolilein – MichaelKnopf, mySchach.de, 2005.

2.Na3 a5 3.b5= cb5 4.Nb5 Nc6 5.Ba3 d6 6.e3 Nf6 7.Be2 g6 8.Nf3 Bg7 9.d4 0–0 10.0–0 Nd5 11.Qd2 Nc7 12.c4 Na6 13.Nc3 Re8 14.Rab1 Ncb4 15.Bc1 e6 16.a3 Nc6 17.Na4 Nc7 18.Nb6+/– Ra7 19.Qc2 Na8 20.Nc8 Qc8 21.Ne1 Nc7 22.f4 Qd7 23.Nf3 Rb8 24.Bd2 Nd8 25.c5 Nc6+= 26.cd6 Qd6 27.Qa4 b6 28.Rfc1 Ne7 29.Ng5 Qd8 30.g4 h6 31.Nf3+= Ncd5 32.h3 Rc7+= 33.e4 Rc1 34.Rc1 Nf6 35.Bd3 Rc8 36.Rb1 Nd7+= 37.Qb3 Attacks the backward pawn on b6 37...Nc6 38.Be3 Qe7 39.e5 Bf8 The isolani on a3 becomes a target 40.Ra1 Kg7 41.f5 ef5 42.gf5 gf5 43.Bf5 Ncb8 44.Ra2 Kh8 45.Rg2 Qa3 46.Qa3 Ba3 47.Bh6 Rg8? 48.Ng5 (48...Rg5 49.Rg5+–) 1–0. Krueger,D – Grund,Karl, corr SOK–89–47, 1989.

2.Na3 e5 3.Nc4 =+.

2.Na3 Nf6 3.Nf3 e6 4.Rb1 d5 5.e3 Bd6=+ 6.d4 a5 7.c3 ab4 8.cb4 Ne4 9.Qb3 0–0 10.Bd3 Nd7 11.Nd2 Nd2–/+ 12.Bd2 e5 13.Nc2 Qg5 14.Bf1 Re8 15.g3 ed4 16.Nd4 Nf6 17.Bg2 Ne4 18.Bc1 Qf6 Black launches an attack 19.0–0 Qh6 20.Nf3 Bh3 21.Bb2 Qh5 22.Bh3 Qh3 23.a3 Qh5 24.Qd1 Qf5 25.Nd4 Qh3 26.Rc1 Re5 27.Qc2 Rh5 Do you see the mate threat? 28.f4 Rh6 29.Nf3 Rg6 30.Qg2 Qg4 31.Rfd1 Re6 32.Rd3 Rh6 33.b5 Nc5 34.Rdd1 Na4 35.Be5 Ba3 36.Ra1 Nb6 37.bc6 bc6–+ 38.Bc7 Nc4 39.Ne5 Ne5 40.Be5 Bf8 41.Qc2 Qc8 42.Ra8=+ Qa8 43.f5 Qa6 44.Bf4 Rh5 45.Rc1 Qa3 46.Rb1 g6 47.Rb8 Rf5 (47...Qa1 48.Kg2 Qf6 49.g4+=) ½–½. Krueger,D – Ihlenfeld,E, M52D, 1992.

2.a4 a6 3.c4 Nf6 4.Bb2 Qb6 (4...e6 5.Qb3=+) 5.Qb3 e6 6.b5 ab5 (6...d5 7.e3=) 7.ab5 Ra1 8.Ba1 cb5 9.cb5 Bc5 (9...d5 10.Bf6 gf6 11.e3=) 10.e3 0–0 (10...Qd8 11.Bf6 Qf6 12.d4+=) 11.Bf6+= gf6 12.Nf3 d5 13.Be2 Nd7 14.0–0 Re8 (14...Ne5 15.Nc3+=) 15.d4 Bd6 16.Rc1 Nf8 17.Nc3 Ng6 18.g3 (18.Na4 Qa5+–) 18...Bd7+= 19.Na4 Qa5 The isolani on b5 becomes a target 20.Nc5 Bc8 (20...Rc8 21.Qb2 Bc5 22.dc5+=) 21.Bd3 b6 22.Na4 (22.Qa4 e5 23.Qa5 ba5+–) 22...Bd7 23.Nd2?? (23.Ra1 Ra8+=) 23...Ra8?? (better 23...Qd2 24.Rc2 Qa5–+) 24.Nc3+= Bb4 25.Rb1?? (better 25.Rc2 Qa1 26.Kg2+=) 25...Bc3–+ 26.Nf3 Qa3 27.Qa3 (27.h4 Qa5–+) 27...Ra3 28.Be2 Ra2 (28...e5 29.de5 fe5 30.Rd1–+) 29.Bd3 (29.Bf1 e5–+) 29...Rb2 (29...e5!? 30.Rc1 Bb2 31.Rc7–+) 30.Rb2 Bb2 31.e4 (31.h3–+) 31...de4 32.Be4 Bb5 33.Nd2 (33.d5 f5 34.Bc2 ed5 35.Bf5 Bc4–+) 33...Bd4 34.Nb3 Bc5 (34...Bc3 35.h3–+) 35.h4 Bc4 36.Nd2 (36.Nc5 bc5 37.f4 f5–+) 36...Bd5 (36...b5 37.Nc4 bc4 38.Kf1–+) 37.Bd3 (37.Bd5 ed5 38.Kf1 Ne5–+) 37...Ne5 38.Bb5 (38.Be4 Ng4–+) 38...Nf3 (better 38...Bb4!? 39.f4 Bd2 40.fe5 fe5 41.Kf2–+) 39.Nf3 Bf3 40.Be8 (40.Kf1 f5–+) 40...e5 (40...f5 41.Kf1–+) 41.Bd7 e4 42.Bf5 (42.Kf1 Kg7–+) 42...Kg7 (42...b5 43.Bd7 b4 44.Ba4–+) 43.Bd7 f5! 44.Kf1 (44.Bf5 b5 Passed pawn) 44...Kf6 45.Be8 (45.Ke1 f4! 46.Bc6 fg3 47.fg3 Ke5–+) 45...h6 46.Bd7 e3 (46...f4!? 47.gf4 Be7 48.Ke1–+) 47.fe3 Be3 48.Bc8 (48.Ke1 f4 49.gf4 Bf4–+) 48...Ke5 49.Bd7 f6 50.Be8 (50.Bb5 f4 51.gf4 Kf4–+) 50...Bd5 (50...h5!? 51.Bb5–+) 51.Bg6 1–0. AleksandrNekhoroshik (1720) – Sanico_Pci (1715), lichess.org, 2021.

2.a4 b5 (--> 1.b4 b5 2.a4 c6).

2.a4 Qc7 3.c4 d6 4.d4 g6 (4...e5 5.Nf3=) 5.b5 Bg7 6.bc6 (6.e3 Nf6=) 6...bc6 (better 6...Nc6 7.e3 Nf6=+) 7.Qb3? (7.e3 Nf6=) 7...Nh6 (better 7...Bd4!? 8.Bb2 Bb2 9.Qb2 Nf6–+) 8.Bh6=+ Bh6 9.Nc3 0–0 10.e3 e5 11.Bd3 f5 (11...ed4 12.ed4 Na6 13.Nge2=+) 12.d5 (12.c5 Kh8 13.cd6 Qd6=) 12...Kh8 13.dc6 Nc6 14.Nd5 Qd7 15.Rb1 Rb8 16.Qb8? (better 16.Qd1=+) 16...Nb8–+ 17.Rb8 Qa4 18.Rc8?? (18.Ne2–+) 18...Rc8 19.Ne2 (19.Nc3 Qb4 20.Nge2–+) 19...Qa1 20.Kd2 Qh1 21.Ne7 Re8 22.Ng6 hg6 23.Bf5 gf5 24.Ng3 Qg2 25.Nf5 Qf2 26.Kd3 Qf5 (26...e4 27.Kc3 Qe1 28.Kc2 Rb8 29.Nh6 Qb1 30.Kd2 Qa2 31.Kc3 Qb2) 27.e4 (27.Kd2 Qf2 28.Kc3 Qe3 29.Kb4 Rb8 30.Ka4 Qb3 31.Ka5 Qa2) 27...Qf3 28.Kc2 Qe4 (28...Rb8 29.c5 Qb3) 29.Kb3 (29.Kc3 Qd4 30.Kc2 Rb8 31.c5 Rb2) 29...Qd4 (29...Rb8 30.Ka3 Qc4 31.h4 Bc1) 30.Kb4 (30.h4 Rb8 31.Kc2 Rb2) 30...Rb8 31.Ka5 (31.Ka4 Qa1) 31…Qa1 0–1. afsharian – PRARIA, lichess.org, 2018.

2.a4 d6 3.h4 Nf6 4.Nf3 g6 5.d4 Bg7 6.e3 Bg4 7.Be2 Nbd7 8.0–0 e5 9.c4 0–0 10.Nc3 Nh5 11.b5 (time). guest299 – guest1321, ICC, 2003.

2.a4 g6 3.Bb2 f6 4.c4 Bg7 5.b5 e5 6.d4 d6 7.a5 Ne7 8.d5 cd5 9.cd5 Nd7 10.e4 Nc5 Black gets the initiative 11.Nc3 f5 12.Bd3 fe4 13.Ne4 Ne4 14.Be4 0–0 15.g4 (15.Nf3 Rf4 16.Qd3 Bd7=+) 15...h6 (15...Bd7 16.Qb3–/+) 16.h4 (16.g5 hg5 17.Nf3 Qc7=+) 16...Rf4=+ 17.f3 Bg4 18.fg4? A deflection. (18.Qd3 Bh5 19.Ne2=) 18...Re4–+ 19.Kf2 (19.Ne2 Rb4 20.Qd2 Rb5–+) 19...Rb4 20.Qe2 Nd5 21.Qd2 Qf6 22.Nf3 Qe6 23.Rae1 (23.Ra3 Rg4 24.Rg1 Nf4 25.Rg4 Qg4–+) 23...Rg4 (23...Rf8 24.Rh3 Nf4 25.Rh2 Rb2 26.Qb2 Nd3 27.Kg1 Nb2 28.Rb2 Qg4 29.Rg2 Qf3 30.b6–+) 24.Rhg1 Rg1 25.Rg1 (25.Kg1 Qg4 26.Kf2–+) 25...e4 26.Qe2 (26.Nd4 e3 27.Ke2 Qf7–+) 26...e3 (better 26...Nf4 27.Qe3 Nh3 28.Ke1 Ng1 29.Ng1 Bb2 30.Ne2–+) 27.Kg3 Be5 (better 27...Bb2 28.Qb2 Rf8–+) 28.Ne5 de5 29.Bc1 (29.Qg4 Qg4 30.Kg4 Rf8–+) 29...Nf4 30.Qe3 (30.Qg4 Qb3–+) 30...Qh3 (30...Rd8 31.Qf3 Qh3 32.Kf2 Qh4 33.Rg3–+) 31.Kf2 Qh4 32.Kf3 (32.Kf1 Rf8 33.Qf3 Ne6 34.Rg6 Ng7 35.Qf8 Kf8–+) 32...Re8 (32...Rf8 33.Ba3 Nd5 34.Bf8 Ne3 35.a6 Qf4 36.Ke2 Qh2 37.Kd3 Qg1 38.ab7 Qf1 39.Ke3 Qf8 40.Ke4–+) 33.Qb3 Kg7 34.Qc3 (34.Qd1 e4 35.Ke3 Qh3 36.Kd2 Rd8 37.Kc2 Rd1 38.Rd1 e3 39.Bb2 Kf7–+) 34...Nd5 (better 34...Qh3 35.Rg3 Qg3 36.Kg3 Ne2 37.Kf2 Nc3 38.Be3 Nb5 39.Kf3–+) 35.Qc5 (35.Qe1 Qh3 36.Qg3 Rf8 37.Ke2 Nc3 38.Ke3 Qf5 39.Qg6 Qg6 40.Rg6 Kg6–+) 35...Qh3 36.Rg3 (36.Kf2 Rf8 37.Ke1–+) 36...Qf1 37.Ke4 Nf6 38.Ke3 Qf4 39.Ke2 Qg3 40.Qc7 Kg8 (40...Kh8 41.Bd2–+) 41.Qc4 Kh8 42.Qf7 (42.Qd3 Qd3 43.Kd3 Rd8 44.Ke2 Ng4–+) 42...Qg4 43.Ke3 Qg3 (better 43...Qe4!? 44.Kf2 Ng4 45.Kg3–+) 44.Ke2 Qg2 45.Ke3 Qg1 (45...Ng4 46.Kd3 Rc8 47.Qc4 Qf3 48.Be3 Qe3 49.Kc2 Rc4 50.Kb2 Qc3 51.Kb1 Qc2 52.Ka1 Ra4) 46.Ke2 Qc1 (46...Qh2 47.Kf1 Qh1 48.Ke2 Qh5 (48...Qc1?! 49.Qf6 Kg8 50.Qg6 Kh8 51.Qf6 Kh7 52.Qf7 Kh8 53.Qf6 Kh7 54.Qf7 Kh8 55.Qf6=) 49.Ke1 Qh4 50.Kd1 Qf2 51.Qe8 Ne8 52.Bh6 g5–+) 47.Qf6= Kg8 48.Qg6 Kf8 49.Qf6 Kg8 50.Qg6 Kf8 51.Qf6 Kg8 52.Qg6 Kf8 53.Qf6 Kg8 ½–½. hamiltonharris (1750) – ticarl (1705), ChessWorld.net, 2015.

2.Bb2 Nf6 (--> 1.b4 c6 2.Bb2 Nf6)

2.b5 d5 (--> 1.b4 d5 2.b5 c6).

2.c3 a5 (--> 1.b4 a5 2.c3 c6).

2.c3 b5 3.e3 a5 4.Bb2 ab4 5.cb4 g6?? (better is 5...Nf6=) 6.Bh8+– f6 7.a3 (better is 7.Qg4+–) 7...Nh6 8.Nc3 Nf5 (8...Nf7 9.Qf3+–) 9.Bf6! ef6 10.Nf3 Kf7 11.Be2 Bb4 (11...Kg7+–) 12.ab4 Ra2 (12...Ra1 13.Qa1 Na6+–) 13.Na2 Na6 14.Nc3 (better is 14.Qc2 Kg7+–) 14...Nb4 (14...Qe7 15.Qb3 Kg7 16.Na2+–) 15.Rb1 (15.Qb3 Nd5 16.e4 Kg7 17.ef5 Ne7+–) 15...Kg7 (15...Na6 16.d4+–) 16.Rb4 d5 17.Rb1 (better is 17.d4 Qe7 18.Qb3 Nd6+–) 17...Ne3 18.fe3 h5 19.0–0 Bg4 20.h3 Bf3 21.Bf3 Qb6 22.Nb5! cb5 23.Qb3 (23.Bd5 Qc5 24.Qb3 b4+–) 23...b4 24.Qb4 Qb4 25.Rb4 Kh6 26.Rfb1 d4 27.ed4 Kg5 28.d5 (28.d5 h4 29.d6 Kh6 30.Rh4 Kg5 31.Rg4 Kh6 32.d7 g5 33.d8Q Kg6 34.Be4 f5 35.Rb7 fe4 36.Qg5) 1–0. Fournier,Frederic (2010) – danielceballo (1725), Active Blind, 2008.

2.c3 Qb6 3.a3 a5 4.d3 ab4 5.cb4 c5 6.Bb2 cb4 7.ab4 Ra1=+ 8.Ba1 Qb4 9.Nd2 Nf6 10.Qb3 Qb3–/+ 11.Nb3 e6 12.Nf3 Be7 13.e3 0–0 14.Be2=+ Nc6 15.0–0 d5 16.Rd1 Bd7 17.e4 de4 18.de4 Rd8 19.Bd3 Nb4 20.Bc4 Ne4–+ 21.Re1 Nd6 22.Be2 Bc6 23.Nc5 Nc2 24.Rc1 Na1 25.Ra1 Ne4 26.Ne4 Be4 27.Ra4 Bf3 28.gf3 g6 29.Kg2 b5 30.Rb4?? Bb4 (31.Bb5 h6–+) 0–1. Unic – alexy1 (2000), ICC, 2003.

2.c3 Qc7 3.e3 e6 4.Nf3 Na6 (4...d5 5.d4=) 5.Bb2 Be7 6.d4 d6 7.Bd3 Bd8 8.Nbd2 Ne7 9.Qc2 Bd7 10.0–0 0–0? (10...Ng6 11.a4+=) 11.a3 (11.Bh7 Kh8 12.Bd3 f5+–) 11...Rb8? (11...Ng6 12.c4+/–) 12.Rfe1 (better is 12.Bh7 Kh8 13.Bd3+–) 12...b6?? (better is 12...Ng6!?+/–) 13.Rac1 c5? 14.bc5 dc5? 15.dc5 bc5?? 16.Be2 f6?? 17.Nb3 c4 18.Nbd4 Ba4?? 19.Qb1 Nc6?? 20.Nc6 Bc6 21.Nd4 Rb6?? 22.Nc6 Rc6= 23.Bf3 Be7 24.Bc6+/– Qc6 25.Qc2 Rb8 26.Rb1 Ba3?? 27.Ba3+– Rb1 28.Rb1 Nc5 29.Bc5 Qc5 30.h3 a5 31.Qb2 a4 32.Ra1 Kf7 33.Ra3 g5 34.Qa1 e5 35.Ra4 f5 36.g3 f4 37.ef4 gf4 38.Kh2 fg3?? 39.fg3 Qd6?? 40.Ra2 e4 41.Rg2 h5 42.Qg1 h4 43.Kh1 hg3 44.Rg3 e3 45.Re3 Qh6 46.Qe1 Qe3 47.Qe3 Kf6 48.Kg2 Kf5 49.Kh2 (49.Kh2 Kf6 50.h4 Kg7 51.Qe6 Kf8 52.h5 Kg7 53.Qe7 Kh6 54.Qf7 Kg5 55.Kg3 Kh6 56.Qg6) 1–0. Fournier,Frederic (1895) – dorado1978 (1705), Active blind, 2011.

2.c3 e6 (--> 1.b4 e6 2.c3 c6).

2.c3 g6 3.Bb2 e6 4.e3 Bg7 5.Nf3 Ne7 6.a3 b6 7.Be2 Bb7 8.0–0 Rf8 9.d4 c5 10.dc5 bc5 11.Nbd2 d6 12.Qc2 cb4 13.cb4 Bb2 14.Qb2 Nd7 15.Rfd1 Rc8 (15...Nd5 16.Nc4 N7b6 17.e4 Nc4 18.Bc4+/–) 16.Rac1 (16.Nc4!? Rc4 17.Bc4 Bf3 18.gf3 Nf5+–) 16...Rc1+/– 17.Rc1 Bf3 18.Nf3 (18.gf3?! Nf5+=) 18...f5? (18...Qb6 19.Qd2+/–) 19.h3 (19.Ng5 Qb8+–) 19...h5? (19...Nd5 20.Nd4 Kf7 21.Nb5+/–) 20.Rd1 g5?? 21.Bd3 f4?? 22.ef4 gf4 23.Qc2 e5?? 24.Be2 h4? 25.Rd2 d5 26.Qd1 e4 27.Nd4 f3 28.Nf3?? ef3+= 29.Bf3 Rf7?? 30.Bd5 Nd5= 31.Rd5 Re7 32.Rd7?? Rd7–+ 33.Qf3 Re7 34.Kh2 Rf7 35.Qg3?? hg3 (35...hg3 36.fg3 Qd1 37.g4 Rf1 38.h4 Qd6 39.g3 Qd2 40.Kh3 Rh1) 0–1. Fournier,Frederic (2035) – ghiooo, Active Blind, 2008.

2.Nc3 Qb6 3.Rb1 a6 4.Nf3 d5 5.g3 (5.e4 de4 6.Ne4 Nf6 7.Nf6 ef6+=) 5...f6 (5...Nf6 6.Na4 Qd8 7.Bb2=) 6.Bg2 (6.e4 e6=) 6...e5 7.0–0 Bd6 (7...Bb4? 8.a3 a5 9.d3+–) 8.e4 Ne7 (8...d4!? 9.Na4 Qd8=) 9.d4+= 0–0 10.de5 fe5 11.ed5 Rd8 12.Ng5 Bf5 (12...Qd4 13.Qh5 h6+– (13...Qc3?? 14.Qh7 Kf8 15.Rb3 Qb3 16.Qh8 Ng8 17.cb3+–)) 13.Be4 Be4 (13...Bb4 14.Qh5 h6 15.Qf7 Kh8 16.d6+–) 14.Nce4 cd5? (14...h6 15.Be3 Qb5+–) 15.Qh5 h6 (15...de4 16.Qh7 Kf8 17.Qh8 Ng8 18.Ne6 Ke7 19.Nd8 Qd8 20.Bg5 Nf6 21.Qg7 Ke6 22.Bf6 Qc7+–) 16.Nf6!! (16.Nd6?! hg5 (16...Qd6?? 17.Qf7 Kh8 18.Ne6+–) 17.Qf7 Kh7+–) 16...gf6 (16...gf6 17.Qf7) 17.Qf7 (17.Qf7 Kh8 18.Qh7) 1–0. Janek – Lqq6g, internet, 2019.

2.Nc3 Qc7 3.Nf3 (3.e4 Nf6= (3...e5 4.a3 Nf6 5.d4 a5 6.b5 d5 7.Nf3 Bd6 8.bc6 bc6+=) 4.d4 (4.Nf3 e5 5.a3 d5 6.ed5 cd5 7.Qe2 e4 8.Bb2 a5=) 4...e5 5.a3 a5 6.b5 d5 7.Nf3 Bd6 8.bc6 bc6+=; 3.d4 A) 3...d5 4.e4 e5 5.a3 a5 6.b5 Nf6 7.Nf3 Bd6 8.bc6 bc6+=; B) 3...Nf6 4.e4 e5 5.a3 a5 6.b5 d5 7.Nf3 Bd6 8.bc6 bc6+=; C) 3...e5 4.a3 (4.Rb1 d5 5.de5 Qe5 6.Bd2 Bd6 7.Nf3 Qe7 8.b5 Nf6=) 4...d5 5.e4 a5 6.b5 Nf6 7.Nf3 Bd6 8.bc6 bc6+=; D) 3...b5 4.e4 (4.Bd2 e6 5.Nb1 a5 6.ba5 Nf6 7.Nf3 Ne4 8.e3 d5=) 4...e5 5.Rb1 a5 6.a3 Na6 7.ba5 Qa5 8.Nge2 ed4=) 3...e5 4.a3 (4.Rb1 d5 5.e4 d4 6.Ne2 Nf6 7.c3 Ne4 8.cd4 ed4=) 4...Bd6 (4...d5 5.e3+= (5.Bb2 Nf6 6.e3 Bd6 7.Be2 a5 8.ba5 0–0–/+) 5...Nf6 6.Bb2 Bd6 7.Be2 a5 8.ba5 Ra5–/+) 5.Ne4 (5.d4 Nf6 (5...ed4 6.Qd4 Be7+= 7.Bf4 Qb6 8.Rd1 Qd4+/–) 6.e4 a6 7.Bg5 b5 8.g3 Bb7+=) 5...Nf6 (5...Be7 6.Bb2 d6 7.Ng3= Nf6 8.e4 a5=) 6.Nd6 (6.Nf6 gf6 7.e4 Be7+= 8.c4 d6+=) 6...Qd6 7.Bb2 Ne4 (better is 7...e4!? 8.Nd4 0–0+=) 8.Be5 (8.e3 Qe7+/–) 8...Qd5? (better is 8...Qg6!?+/–) 9.c4+– Qe6 10.Bg7 Rg8 11.Bb2 Qc4? (11...d6+–) 12.d3 Nc3 (12...Qe6 13.de4 Qe4 14.Qd6+–) 13.Qd2 (13.dc4!? Nd1 14.Rd1 a5+–) 13...Qb4 (13...Qe6 14.Bc3 d5+–) 14.ab4 (14.ab4 Nd5 15.Qh6+–) 1–0. pierre – vekers, internet, 2010.

2.Nc3 d6 3.h4 h5 4.Ne4 (4.Nf3 Nf6+=) 4...f6 (4...a5!? 5.b5 cb5=) 5.Ng3 Nh6 6.e4 Bg4 7.Be2 e6? (better 7...Qb6+=) 8.f3+– f5 9.fg4 hg4 10.d3 (better 10.Bb2!? Qe7 11.Bd3 f4+–) 10...d5 11.ef5 (11.c3 Qf6 12.d4 fe4 13.Bg4 Nd7+–) 11...ef5? (better 11...Qc7 12.Kf2 Bd6+–) 12.Bb2?? (12.Qd2 Nd7+–) 12...d4?? (better 12...Qd6 13.Kf2 Qf4 14.Bf3 gf3 15.Qf3 Qb4 16.Re1 Kd7–/+) 13.Bd4?? (better 13.Qd2 Na6 14.a3+–) 13...Bb4 (better 13...Qd4 14.Rb1 Bd6–+) 14.c3=+ Qd4 15.cb4 Qc3 16.Kf1 Qb4 (16...Qd4 17.Qe1 0–0=) 17.Rb1?? (better 17.Qe1 Qe7 18.Bd1+–) 17...Qf4–+ 18.Ke1? (18.Nf3 gf3 19.Bf3 Qg3 20.Qe2 Kd8 21.Rb7–+) 18...Qg3 19.Kd2 (19.Kf1 Qf4 20.Ke1 Qc7–+) 19...Qf4 (better 19...Nd7 20.Bf1 0–0–0 21.Ne2–+) 20.Kc2 Na6 21.Rb7 Rc8?? (better 21...Nc5 22.Rb2 Rd8–+) 22.Ra7?? (22.Qd2 Qa4 23.Kb1 Rc7=+) 22...0–0 (better 22...Nb4 23.Kb2 Qd4 24.Kc1 Qa7–+) 23.Ra6= c5 (23...Qf2 24.Qf1 Qc5 25.Kd2 Qb4 26.Kc2=+) 24.Qf1 (24.Qd2 Qd4 25.Ra3 Rb8=) 24...Qb4 (24...Qd4 25.Ra3=) 25.h5 (25.Qb1 Qd4 26.Qb2+=) 25...Nf7? (25...Rb8 26.Qa1 c4–/+) 26.Qf5?? (26.h6 c4 27.d4=) 26...Nd6?? Black prepares the advance c4 (26...Rb8 27.Qe6 (27.Qg4 Qb2 28.Kd1 Qc3 29.Qg7 Kg7 30.h6 Kh8 31.Rb6 Rb6 32.Bg4 Rb1 33.Ke2 Qe1 34.Kf3 Ne5) 27...Qb2 28.Kd1–+) 27.Qg4 (better 27.Qe6 Nf7 28.Rb6 (28.Bg4?! c4 29.d4 Rb8=+; 28.Qg4 c4 29.d4 c3–+) 28...Qa4 29.Qb3+–) 27...c4= 28.a3?? (28.d4 Rb8 29.Nf3 Qb2 30.Kd1–+) 28...cd3 29.Kd3 (29.Kd1 Qb1 30.Kd2 Qc1 31.Kd3 Qc3) 29…Qc3 0–1. wayne200885 – angel027, ChessWorld.net, 2006.

2.Nc3 Nf6 3.e4 e5 4.a3 Be7 (4...a5 5.ba5 Bc5 6.Nf3+=) 5.Nf3 d6 (5...a5 6.Bb2= (worse is 6.Ne5 ab4 7.Nb1 d6–/+)) 6.Be2 0–0 7.0–0 Ne8 (7...a5 8.b5=) 8.d4+= f6 (8...Nd7 9.Qd3+=) 9.Bc4 Kh8 10.Nh4 g6 (10...b5 11.Bb3 Nc7 12.a4+=) 11.Nf3 Ng7 12.d5 (12.Be3 b5 13.Be2 a5+=) 12...f5+= 13.Bh6 b5 (13...fe4 14.Ne4 b5 15.Be2+=) 14.Bb3 (14.Bd3 a5+/–) 14...Bb7 (14...fe4 15.Nd2=) 15.a4 (15.dc6 Bc6 16.ef5 Rf5+/–) 15...ba4 16.Ra4 1–0. pierre – peoli, internet, 2010.

2.Nc3 g6 3.Nf3 Bg7 4.e3 d5 5.Bd3 Nf6 6.0–0 0–0 7.Ba3 (7.Bb2 Qd6 8.a3 e5=) 7...b6 8.Qe2 a5 9.b5 c5 10.Qe1 Bg4 11.Ne5 Be6 12.f4 Ng4 13.Ng4 Bg4 14.Qh4 Be6 15.f5 Bc8 16.Rad1 Bb7 17.fg6 fg6 18.Rf8 Qf8 19.Rf1 Qe8 20.Be2 Nd7 21.Qh3 Nf6?? (better is 21...e6+=) 22.Qe6+– Kh8 23.Qb6 Qb8 24.Qc5 (24.Bc5?! Nd7 25.Qe6 Nc5 26.Qe7 Bf8=) 1–0. Anonymous – Anonymous, sv.lichess.org, 2011.

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

2.c4 f5 3.Bb2 e6 4.e3 Nf6 5.a3 d5 6.d4 Bd6 7.c5 Bc7 8.Nf3 0–0 9.Bd3 Bd7 10.0–0 Be8 11.Nbd2 Bh5 12.Be2 Nbd7 13.Ng5 Be2 14.Qe2 Ng4 15.Ndf3 Bh2 16.Nh2 Qg5 17.Ng4 fg4 18.f4 Qh4 19.g3 Qg3 20.Kh1 Rf6 21.Qg2 Rh6 22.Kg1 Qe3 23.Qf2 Qf2 24.Rf2 Rf8 25.Raf1 Rf5 26.Rh2 Rh2 27.Kh2 g5 28.Kg3 h5 29.Rf2 Nf6 0–1. Trkn – zweitausend, itsyourturn.com, 2001.

2.c4 g5 3.Bb2 (3.d4 h6+=) 3...f6 (3...Nf6 4.e4=) 4.e3 (4.e4 Nh6+=) 4...h5 (4...Nh6 5.d4+=) 5.Be2+– e5 (5...g4 6.h3+–) 6.Bh5+– Ke7 7.d4 d6 8.h4 (8.e4+–) 8...g4 (better 8...Bg7!?+–) 9.Bg4+– Bg4 10.Qg4 Nh6 11.Qf3 Nd7 12.Nd2 (12.a3 Qb6+–) 12...Qe8 (12...Bg7 13.a3+–) 13.Ne2 (13.Rd1 Kd8+–) 13...Kd8 (13...Bg7 14.d5 Rc8 15.e4+–) 14.b5 cb5 (14...ed4 15.ed4 (15.bc6?! Ne5 16.Qe4 de3 17.Qe3 Qc6+–) 15...Rc8 16.bc6 bc6 17.Rb1+–) 15.Qb7 Ke7 (15...Rb8 16.Qa7 Qg6 17.Qa5 Ke8 18.cb5 Qg2 19.Rg1+–) 16.de5 (16.Qb5?! Rb8 17.Qa4 Rb2 18.Qa7 Qg6+=) 16...Ng8 (16...de5 17.Ba3 Kf7 18.Bf8 Kf8 19.Qb5 Qc8+–) 17.ed6 Kf7 18.Qd5 (18.c5 Rb8 19.Qd5 Qe6 20.Qe6 Ke6 21.Nf4 Kf7+–) 18...Kg7 19.Nf4 Nb6 20.Qg5 Kf7 (20...Kh7 21.Qf5 Kg7+–) 21.Qg6 1–0. DEFFM – GuestYNPB, freechess.org, 2018.

2.c4 h6 3.Bb2 e6 4.a3 Qg5 (4...d5!?=) 5.Nf3+= Qe7 6.e3 b6 7.d4 a5 8.b5 cb5 9.cb5 Bb7 10.Be2 Qf6 11.Nbd2 Ne7 (11...d5 12.Ne5+=) 12.0–0 Nf5 (12...Nd5 13.Rc1+/–) 13.Qc2 Nh4 (better is 13...Nd6+/–) 14.Nh4 Qh4 15.Nf3 (better is 15.Qc7 Bd5 16.e4+– (16.Qb6?! Qd8 17.Qd8 Kd8+–)) 15...Qd8+/– 16.Rac1 Be7 17.Qc7 Bd5 18.Qd8 Bd8 19.Rc3 (19.Nd2 0–0+/–) 19...0–0 20.Rfc1 Bf6 21.Rc8 d6 22.Rf8 Kf8 23.Rc8 Ke7+= 24.Nd2 Nd7 25.Ra8 Ba8= 26.Ne4?? Be4–+ 27.f3 Bc2 28.e4 e5 29.d5 Nc5 30.Kf2 g5 31.g4 Na4 32.Bc1 Nc3 33.Bc4 Ba4 34.h3 Nb5 0–1. Fournier,Frederic (1670) – riutronks, Active, 2008.

2.d3 a5 3.Bd2 ab4 4.Bb4 Nf6 5.e4 d5 6.e5 Nfd7 7.f4 c5 8.Bd2 e6 9.Nc3 Nc6 10.Nf3 f6 11.Qe2 fe5 12.Ne5 Nde5 13.fe5 Be7 14.g3 0–0 15.Nb5 Ne5 16.Bf4 Qa5 17.c3 Qb5?? (Better is 17...Ng6 18.Qb2 Bd7–+) 18.Be5 Bf6 19.Bf6 Rf6 20.Qc2 Qa4 21.Qd2 Bd7 22.h4 Raf8 23.Be2 e5 24.Bd1 Qa5 25.Bb3 Be6 26.0–0–0?? Rf2 (27.Rhe1 Qa3 28.Kb1 Rd2 29.Rd2 c4 30.dc4 dc4–+) 0–1. Pietrzak,Wojciech – Simon,Holger (1960), IECG, 2000.

2.d3 d5 3.Nf3 Bf5 (3...Nf6 4.c3=) 4.g3 (4.c3 Nd7=) 4...Nf6 (4...e5 5.c3 Bd6 6.Bg2=+) 5.Bg2 (5.c3 e6=+) 5...h6 (5...e5 6.0–0=+) 6.Nbd2 (6.0–0 Nbd7=) 6...e6 (6...e5 7.Rb1 Bd6 8.c4=+) 7.a3 (7.Rb1 b5=) 7...a5 8.ba5 Qa5 9.Bb2 Nbd7 (9...Be7 10.0–0=) 10.0–0 Be7 11.c4 0–0 12.cd5 cd5 (12...Nd5? 13.e4+–; worse 12...Qd5 13.e4 Qd3 14.ef5 Qf5 15.Nd4+–; 12...ed5?! 13.Nb3 Qa4 14.Nbd4=) 13.Nd4 (13.Nb3 Qb6=+) 13...Bg6 14.N4b3 (14.Re1 Rfc8=+) 14...Qb5 (14...Qa4 15.Re1=+) 15.Qb1 Nb6 (15...Rfc8 16.Rc1=+) 16.Nd4 (16.Rc1 Rfc8=) 16...Qd7 (16...Qa6 17.Bc3=+) 17.Qc2 (17.N4f3!? Na4 18.Bd4=) 17...Rfc8 (17...Na4 18.Qb3=+) 18.Qb3=+ Na4 19.N4f3 (19.Rfc1 Rc5=+) 19...Bh7 (19...Nb2 20.Ne5 Qa4 21.Ng6 fg6 22.Qb2 Ba3 23.Qb6–/+) 20.Rfc1 (20.Ne5 Qd6=) 20...Nc5 (20...Nb2 21.Rc8 Rc8 22.Qb2=+) 21.Qd1 Ng4 (21...Bf5 22.a4=+) 22.h3 (better 22.Bd4=) 22...Nf2 (better 22...Nf6!?=) 23.Kf2+– Bd3 24.Ne5 Qb5 25.Bd4 (25.Nd3?! Nd3 26.ed3 Qb2 27.Rc8 Rc8=+; 25.ed3? Qb2 26.Bf1 Qe5–+) 25...Bh7 (25...Bf5+=) 26.Bc5 (26.a4!? Qb4 27.Bc3+=) 26...Rc5 (26...Bc5 27.Kf1=+) 27.Qb3 (27.Ndf3!?=) 27...Qb3=+ 28.Nb3 Rc1 29.Nc1?? (29.Rc1 Ba3 30.Ra1 Bc5 31.e3 Ra1 32.Na1 Bd6=+) 29...Bf5?? (better 29...Bf6 30.Ra2 Be5–+) 30.Rb1?? (better 30.Ncd3 Ba3 31.Rb1 Bc5 32.Ke1=+) 30…Bb1–+ 0–1. Santana,Expedito (1620) – Inamura,Newton Takanori (1895), Regional Sul Brasileiro de Xadrez, 2017.

2.d4 Nf6 3.Bg5 Nd5 4.Nf3 Qc7 5.e3 e6 6.a3+= Na6 7.Ba6+/– ba6 8.c4 Ne7 9.Bf4 Qb7 10.0–0 Ng6 11.Nc3 Nf4 12.ef4+/– Bd6 13.Ne4 Bf4+= 14.g3 Bc7 15.Qd3 0–0 16.Rad1 f5 17.Neg5 Bd8 18.g4? d5 19.c5? Qc7?? 20.Ne5?? Bg5–+ 21.f4 Bf6 22.g5 Be5 23.de5 Qf7 24.h4 Qh5 25.Qg3 Rb8 26.Kg2 a5! 27.Rb1 Ba6 28.Rfe1 ab4 29.ab4 Bb5 30.Kf2 d4 31.Rb2 d3 32.Rh1 Rfd8 33.Rd2 Bc4 34.Rb1 a5! 35.Rdb2 d2 36.Qg1 Qe2 (37.Kg3 Rd3 38.Qe3 Re3#) 0–1. tuaku – lilgia (1605), internet, 2007.

2.e3 d5 3.Bb2 Nf6 4.Nf3 Nbd7 5.a3 e6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 c6).

2.e4 Na6 3.c3 d6 (3...Nc7 4.d4=) 4.f3 (4.Ba6 ba6 5.Qa4 Qc7+=) 4...c5 (4...Nc7 5.d4=) 5.b5 (5.Ba6 ba6 6.Qa4 Qd7 7.Qd7 Bd7+=) 5...Nb8 6.Bc4 Be6 (Better is 6...e6!?=) 7.Be6+/– fe6 8.Nh3 Qa5 9.a4 Nd7 10.Na3 Nb6 11.Ng5 e5 12.Ne6 Nf6? 13.Nc7+– Kd8 14.Na8 Na8 15.Nc4 Qc7 16.a5 Nd7 17.b6 ab6 18.ab6 Ndb6 19.Nb6 Nb6 20.d3 g6 21.0–0 Bg7 22.Be3 e6 23.Bg5 Ke8 24.Qb3 h6?? 25.Qe6 (25…Kf8 26.f4 Qf7 27.fe5 Bf6 28.Rf6 Rh7 29.Bh6 Kg8 30.Ra8 Na8 31.Qc8 Qe8 32.Qe8#) 1–0. Wessel,Kai – Schroth,Andy, remoteschach.de, 2003.

2.e4 b5 (--> 1.b4 b5 2.e4 c6).

2.e4 c5 3.c3 d5 4.ed5 Qd5 5.d4 e6 6.Nf3 Nf6 7.Bf4 Nc6 8.Nbd2?? cd4–/+ 9.c4? Qd8?? 10.Nb3?? Bb4–+ 11.Bd2 Bd2 12.Qd2 e5 13.g3 0–0 14.Bg2 Bg4 15.0–0 Rc8 16.Rfe1 Re8 17.Rac1 Qb6 18.h3 Bh5 19.c5 Qc7 20.g4 Bg6 21.Na1?! Rcd8 22.Nc2 Ne4 23.Qd1 h6 24.Nh4 Nc5 25.Ng6 fg6 26.Na3 Ne6 27.Qc2 d3 28.Qd2 Nf4 29.Rc3 Ne2 30.Kh1 Nc3 31.Qc3 Qa5 32.Qb3 0–1. Lankof,Piotr – Palczynski,Adrian, Mistrzostwa Polski Juniorow do, 2008.

2.e4 d6 3.h3 Nf6=+ 4.g4 Ne4–+ 5.h4 Qb6 6.g5?? Qf2# 0–1. riverborne – christian108, Live Game Caissa's Web, 2006.

2.e4 g6 3.Bb2 f6 4.d4 d5 5.Nd2 Bg7 6.c4 e6 7.Ngf3 Ne7 8.Be2 0–0 9.0–0 Nd7 10.Qc2 f5 11.e5 h6 12.Rac1 g5 13.h3 Ng6 14.cd5 cd5 (14...Nf4 15.Nc4 ed5 16.Nd6+=) 15.Qc7 (15.g3 Ne7+/–) 15...Qe7 16.a3 h5 (16...Nf4 17.Rfe1=) 17.Rc2 (17.Bb5 g4 18.hg4 fg4+=) 17...g4+= 18.hg4 hg4 19.Nh2 (19.Ne1 Nf4 20.Bb5 a6=) 19...Nf4= 20.Bb5 a6 21.Bd7 Bd7 22.Qc5 (better is 22.Qb6!?+=) 22...Qg5–+ 23.Qd6 Bc6 (better is 23...Ba4!? 24.Rc7 g3 25.fg3 Ne2 26.Kh1 Rae8–+ (26...Qd2?! 27.Qe6 Kh7 28.Qe7 Ng3 29.Kg1 Ne2 30.Kh1–/+; 26...Ng3?! 27.Kg1 Ne2 28.Kh1–+)) 24.g3 Ne2 25.Kh1 Rae8 (25...Qh6 26.Nb3 f4–/+) 26.Re1?? (26.Nb1 Rf7 27.Qc5 Bb5+=) 26...Bb5?? (better is 26...Ba4!? 27.Nb3 Ng3 28.fg3 Bb3–/+) 27.Nb3 Bd3?? 28.Rce2+/– Be2 29.Re2 f4 30.Bc1 Bh6? 31.Bf4+– Qg6 32.Bh6 Qh6 33.Nc5 Rf7 34.Nd7 Ree7?? 35.Nf6+– Kg7 36.Nfg4 Qc1 37.Kg2 Qa3 38.Re3 Qb2 39.Rf3 Qd4 40.Rf7 Rf7 41.Nf3 Qg4–+ 42.Nh4 Qe4 43.f3 Qe2 44.Kh3–/+ Qf1 45.Kg4 Qc4–+ 46.f4 Kh7 47.Qe6+= Rg7 48.Kh5 Qe2 49.g4 d4 50.Qh6 Kg8 51.Qe6 Kh7 52.Qh6 ½–½. Lebedel,Marc (1630) – Louf,Claude, Gorges op, 2008.

2.Nf3 b6 3.Bb2 a6 4.e3 d6 5.d4 e6 6.Bd3 f6 (6...d5 7.a3+=) 7.0–0 g6 (7...d5 8.a3+=) 8.c4 Bg7 9.Nbd2 h6? (better is 9...Ne7+/–) 10.Bg6+– Kf8 11.a4 1–0. Fournier,Frederic (1980) – NN, jeu.europe–echecs.com, 2013. (=1.Nf3 c6 2.b4)

2.Nf3 h6 3.c3 (3.Nc3 Nf6+= (3...e6 4.a3 Nf6 5.e4 a5 6.b5 d5; 3...d5 4.e3 Nf6 5.Be2 Nbd7 6.0–0 e5) 4.e4 e6 5.e5 Nd5 6.Ne4 Bb4; 3.e4 e6 (3...Nf6 4.Nc3 e6 5.Rb1 Na6 6.Ba3 Nc7; 3...d6 4.Nc3 Nf6 5.Be2 Nbd7 6.d4 e6) 4.Bb2 d5 5.Nc3 Bb4 6.Bd3 Nf6; 3.e3 Nf6 (3...e6 4.a3 Nf6 5.Bd3 a5 6.b5 cb5) 4.Bb2 d5 5.Bd3 e6 6.a3 a5; 3.Bb2 d5 (3...Nf6 4.a3 d5 5.e3 e6 6.Nc3 Nbd7; 3...e6 4.e4 d5 5.ed5 cd5 6.Bd3 Nf6) 4.e3 Nf6 5.a3 Nbd7 6.c4 a5; 3.a3 d5 (3...Nf6 4.e3 d5 5.Bb2 e6 6.Nc3 Nbd7; 3...a5 4.b5 d5 5.e3 Nf6 6.Nc3 Nbd7) 4.Nc3 Nf6 5.Bb2 Nbd7 6.g3 e5) 3...b6 (3...Nf6 4.d3= (4.Bb2 d5 5.g3 Qb6 6.Bg2 c5) 4...a5 5.Bb2 d5 6.Nbd2 Nbd7; 3...d5 4.d3 Nf6 5.Bf4 a5 6.a3 g5; 3...a5 4.b5 cb5 5.e3 b4 6.a3 ba3) 4.d4 (4.Na3 Nf6+= 5.g3 d5 6.Bg2 e6) 4...Bb7 (4...Nf6 5.Nbd2+= a5 6.ba5 Ra5; 4...a5 5.b5 Nf6 6.Na3 e6) 5.e3 (5.e4 Nf6 6.Bd3 a5+– (6...e6+–); 5.Nbd2 e6 6.e4 Nf6) 5...d5 (5...a5 6.ba5 Ra5) 6.Bd3 g6 (6...Nf6 7.0–0+=) 7.Nbd2 Bg7 8.0–0 Nf6 9.e4 0–0 (9...Nh5!?+=) 10.e5+– Ne4 (10...Ne8!? 11.e6 fe6+–) 11.Ne4+– de4 12.Be4 Nd7 13.Re1 (13.Qb3 e6+–) 13...e6 14.Ba3 (14.Qd3 Qc7+–) 14...b5 15.Rc1 (15.h4 h5+–) 15...Re8 (15...Qe7 16.Qb3+–) 16.c4+– bc4 (16...a6 17.c5+–) 17.Rc4 (17.Nd2 Nb6 18.Nc4 Nc4 19.Rc4 a5+–) 17...Qb6 (17...Rc8 18.Qb3+–) 18.Nh4 (18.Qb3 Bf8+–) 18...Rab8 (better 18...Qd8 19.g3 Rc8+–) 19.Ng6 (better 19.Qb3+–) 19...fg6+= 20.Bg6 Rf8 21.Qg4 Qb5? (21...Ne5 22.Qe6 Nf7+=) 22.Qe6+– Kh8 23.Rc3 Qd5 24.Qg4?? (24.Qd5 cd5 25.b5 Rfc8 26.Rc8 Bc8+–) 24...Nb6?? (better 24...c5 25.Rg3 Qd4 (25...cd4? 26.Bf5 Qf7 27.e6+–) 26.Qd4 cd4+–) 25.Bc1+– Qa2 (25...Qd7 26.Qd7 Nd7+–) 26.Re2?? (26.Bc2 Qf7 27.Qh4+–) 26...Qa1+= 27.f3?? (better 27.Rec2 Nd5 28.Ra3+–) 27...Qc3–+ 28.Bh6 (28.Bc2 Bc8 29.Qg6–+) 28...Bh6 29.Qh5 (29.Qh4 Qc1 30.Re1 Qg5 31.Qg5 Bg5–+) 29...Kg7 30.Qg4 Kh8 (better 30...Be3 31.Kf1 Rf4 32.Qg3 Qd4 33.b5 cb5 34.Re1–+) 31.Qh4?? (31.Qh5 Qd4 32.Kf1 Qf4–+) 31...Kg7 32.Qg4 Kh8 (better 32...Be3 33.Kf1 Rf4 34.Qg3 Qd4 35.Bd3 Kf8 36.Qg6–+) 33.Qh4 Kg7 (better 33...Qc1 34.Kf2 Nd5 35.Re1 Qd2 36.Re2–+) 34.Qg4 Kh8 (better 34...Be3 35.Kf1 Rf4–+) 35.Qh4= Kg7 ½–½. sneekynyc – teufelhunden, gameknot.com, 2018.

2.f4 e5 3.fe5= Bb4 4.Nf3 (4.c3 Bf8=) 4...d5=+ 5.e3 Bg4 6.Bb2 Nd7?? (better 6...Qb6 7.Bd4 c5=+) 7.e6!+– Ndf6 (7...fe6 8.Bg7 Discovered attack; 7...Be6 8.Bg7 Discovered attack) 8.ef7 Kf7 9.Ne5 Ke6 (9...Ke8 10.Ng4 Ne4 11.Qf3+– (11.Bg7?! Qh4 12.g3 Ng3 13.hg3 Qg3 14.Nf2 Qg7 15.Qh5 Kd7+–)) 10.Ng4 Ng4 (10...Ne4+–) 11.Qg4 Kd6 12.Qb4 c5 13.Qf4 Kd7 (13...Kc6 14.Bg7 Ne7+–) 14.Bb5 Kc8 (14...Ke6 15.Qe5 Kf7 16.Qg7 Ke6 17.Qe5 Kf7 18.Rf1 Nf6 19.Rf6 Qf6 20.Qf6 Kg8 21.Qg7) 15.Qf5 Kb8 (15...Kc7 16.Be5 Kb6 17.Qe6 Qd6 18.Qd6 Kb5 19.a4 Kb4 20.Bc3 Kc4 21.Na3) 16.Be5 (16.Be5 Qc7 17.Qf8) 1–0. Pierre – GuestAjsui, internet, 2020.

2.f4 Nf6 3.e3 g6 4.Nf3 Bg7 5.Bb2 Qb6 6.a3 a5 7.Bd4 Qc7 8.Nc3 d6 9.Bc4 0–0 10.0–0 b5 11.Bd3 Nbd7 12.Ne4 Ne4 13.Bg7 (13.Be4 Nf6 14.Bd3 Bg4=) 13...Kg7 14.Be4 e5 15.fe5 de5 16.Ng5 Qd6 17.c3 h6 18.Nf3 f5 19.Bc2 Nf6 20.d4 e4 21.Ne5 Nd5 22.Qd2 Be6 23.c4 Ne7 24.cb5 ab4 25.g4 (25.ab4 cb5 26.Ra5 Ra5 27.ba5 Rd8=) 25...cb5 26.gf5 gf5 27.ab4 Kh7 28.Kh1 Nd5 29.Bb3 Ne7 30.Bc2 Nd5 31.Bb3 Ne7 32.Bc2 Nd5 33.Qe2 Nb4 (33...Ra1 34.Ra1 Rg8 35.Bb3 Qb4 36.Bd5 Bd5 37.Qh5+=) 34.Qh5 (better is 34.Ra8 Ra8 35.Qh5+/–) 34...Bg8?? (34...Bd5 35.Ra8 Ba8 36.Rf5 Bd5+= (36...Nc2?? 37.Rf7 Rf7 38.Qf7 Kh8 39.Ng6 Qg6 40.Qg6+–)) 35.Ra8+– Ra8 36.Qf5 Kh8 37.Be4 Ra2 (37...Ra7 38.Ng6 Kg7+–) 38.Nf7 (38.Nf7 Kg7 39.Nd6 Rh2 40.Kh2 Nd5 41.Qe5 Nf6 42.Qf6) 1–0. Borik,Juraj (2170) – Kralovic,Andrej (2135), SVK–chT1W, 2008.

2.g3 e5 3.Bb2 f6 4.a3 =+.

2.g3 Nf6 3.Bg2 d5 4.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.g3 Nf6 4.Bg2).

2.h3 e6 3.a3 d5 4.Nf3 Nf6 5.e3 Be7 6.Bb2 0–0 7.Bd3 h6 8.0–0 Nbd7 9.Ne5 (9.Qe2 Qc7=) 9...Ne5=+ 10.Be5 Bd6 11.Bd6 Qd6 12.f4 c5 (12...a5 13.b5=+) 13.bc5= Qc5 14.Nc3 (14.Qf3 d4=) 14...Bd7 15.Qb1 b6 16.Qb4 Bc6 17.Ba6 Rfd8 18.d4 Qd6 19.Rfc1 Qb8 20.Rab1 Nd7 (20...Qc7 21.Nb5 Bb5 22.Bb5=) 21.Nb5 Bb5 22.Bb5 Nf6 (22...Qb7!?+=) 23.Bc6+– a5 24.Qb5 Ra7 25.c4 (25.Qb6 Qb6 26.Rb6 Rc8+–) 25...dc4 (25...Qd6 26.cd5 ed5 27.Qb6+=) 26.Rc4+– (worse 26.Qc4 Rc8 27.Qb3 Rac7=) 26...Ne4?? (better 26...Nd5 27.Bd5 ed5+–) 27.Be4+– Rc7 (27...Rd6 28.Rbc1 Rd8 29.Rc6+–) 28.Bc6 (28.Rc7!? Qc7 29.Qb6 Qb6 30.Rb6 Rc8+–) 28...Rdc8 29.Qb6 (29.Qb6 Qb6 30.Rb6+–) 1–0. Rosner,Dirk – Hasler,Ulrich, F003–SOK, 1999.

2.Nh3 e6 3.a3 d5 4.d4 a5 5.ba5 Nf6 6.Nd2 Qa5 7.c3? (better is 7.e3=+) 7...Qc3–+ 8.Nf4?? (8...Qa1 9.Nb3–+; 8.Ra2 Qd4 9.e3–+) 0–1. Brandenburg,Markus – Lisakowski,Christof (1960), remoteschach.de, 2006.

2.a3 b5

(--> 1.b4 b5 2.a3 c6).

3.Bb2 a5 (--> 1.b4 c6 2.Bb2 a5 2.Bb2 a5 3.a3 b5).

2.a3 Qb6

3.Ra2 d5 4.Rb2 (4.Bb2 a5=) 4...e5=+ 5.Rb3 a5 (better is 5...Nf6=+) 6.c4? (better is 6.Bb2!? Bd6 7.ba5 Qa5 8.Rg3=+) 6...dc4–+ 7.Re3 ab4 8.Qc2 (8.Re5 Be6 9.ab4 Nf6–+) 8...b3 (better is 8...Bc5 9.Re5 Be6 10.Rc5 Qc5–+) 9.Qd1? (9.Re5 Be6 10.Qc4–+) 9...b2 10.Bb2 Qb2 11.d3 (11.Nf3 Nd7 12.Ne5 Ne5 13.f4–+) 11...Ra3 12.Re5 Qe5 13.Na3 Bb4 14.Qd2 Qa1 15.Nb1 (15...Qb1#) 0–1. ragnew – fernschachblitz (1745), net–chess.com, 2004.

3.c4 (--> 1.b4 c6 2.c4 Qb6 3.a3).

3.e3 (--> 1.b4 c6 2.e3 Qb6 3.a3).

2.a3 d5

(--> 1.b4 d5 2.a3 c6).

3.Bb2 Qb6 4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Qb6 4.a3).

3.Bb2 Bf5 4.e3 Nf6 5.Nf3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

3.Bb2 Bf5 4.Nf3 e6 5.e3 Nf6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

3.Bb2 Nf6 4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.a3).

3.Bb2 Nf6 4.e3 Bf5 5.Nf3 e6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

3.Nf3 Bf5 4.Bb2 Nf6 5.e3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

3.Nf3 Nf6 4.e3 Bf5 5.Bb2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.a3).

3.Nf3 Nf6 4.e3 Bf5 5.Bb2 e6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

2.a3 e6

3.Bb2 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 c6).

3.Bb2 Nf6 4.Nf3 (--> 1.b4 e6 2.Bb2 c6 3.Nf3 Nf6 4.a3).

2.Ba3 d5

3.d4 Bf5 4.e3 e6 5.Be2 (5.c4 Bd6=+) 5...Nf6 (5...Qg5 6.g3=+) 6.Nf3 Bd6 7.Nh4 (7.0–0 Qe7=+) 7...Ne4 (7...Be4!?=+) 8.Nf5= ef5 9.Bd3 (9.c4 dc4 10.Bc4 b5=) 9...0–0 (9...Qe7 10.c3=+) 10.0–0 (10.Qf3 f4=) 10...Qh4 Do you see the mate threat? 11.f4 (11.g3 Qe7=) 11...Nd7 (11...b5 12.Qf3–/+) 12.Rf3 (12.b5 Ba3 13.Na3 Ndf6=+) 12...Ndf6 (12...Qe7 13.c3–/+) 13.Qf1 (13.Qe2 Rfe8=+) 13...Ng4 (13...Ng5 14.Bf5 Nf3 15.gf3 Rfe8–+) 14.Rh3 (14.h3 Ngf6–/+) 14...Qf6 (better is 14...Qf2!? 15.Qf2 Nef2–/+ (15...Ngf2?! 16.Rf3 Ng4 17.b5=+)) 15.Be4=+ de4 16.Qe2 (16.c3 b5=+) 16...Qg6 (16...Bf4 17.b5 Be3 18.Kf1 Rfc8 19.bc6 Rc6–+ (19...Bd4 20.c3 Bc3 21.Nc3 Nh2 22.Kg1 Rc6 23.Bb2=+; 19...Qd4?! 20.c3 Qe5 21.cb7 Qf4 22.Ke1 Bf2 23.Kf1–+)) 17.Rg3=+ Rae8 (better is 17...Qh6 18.h3 Nf6=) 18.h3+/– Nf6?? 19.Rg6+– fg6 20.b5 Ba3 21.Na3 cb5 22.Nb5 a6 23.Nc7 Re7 24.Qc4 Kh8 25.Ne6 Rfe8 26.Ng5 h6 27.Nf7 Kh7 28.Ne5 Nh5 29.Rb1 Ng3 30.Kf2 Nh5 31.Rb6 Rd8 32.Ng6 Ree8 33.Ne5 Rc8 34.Qb3 Rc7 35.Nc4 Rec8 36.Nd6 Rc2 37.Kg1 +–. Lekarka – donesteban8, Live Game Caissa's Web, 2006.

3.Nf3 Qb6 4.Ne5?? (4.e3 Nf6=+) 4...f6?? (better is 4...Qd4 5.Nf7 Kf7–+ (5...Qa1?! 6.Nh8 g6 7.Nc3 Qd1 8.Nd1–+)) 5.Nd3=+ e5 6.c3 a5 7.ba5 Ra5 8.Bf8 Kf8 9.Qc1 e4 10.Nf4 Ne7 11.e3 Ng6 12.Ng6 hg6 13.Be2 (13.d4 c5=) 13...Be6 14.Na3 Nd7 15.Nc2 c5 16.0–0 (better is 16.f4!?=+) 16...Qc7 17.g3 Ne5 18.d4?? (better is 18.f4 ef3 19.Bf3–+) 18...ed3–+ 19.Bd1 dc2 20.Bc2 (20.Qc2 g5–+) 20...Nf3 21.Kg2 Bg4 22.h3 (22.h4 Qd7 23.Rh1–+) 22...Rh3 23.Rh1 Rh1 (better is 23...Nh4! 24.Kg1 Rg3 25.Kf1–+) 24.Qh1 Ng5 25.Kg1 Kf7 (better is 25...Nh3 26.Kg2 Qe5 27.c4–+) 26.Qd5 Ke7 (26...Be6 27.Qg2–+) 27.Bg6 (27.Qg8 Kd6–+) 27...Bf3 (better is 27...Be6 28.Qd3 Ba2–+) 28.Qg8–/+ Kd6 29.c4 (29.Rb1 b5 30.Qf8 Kc6–+) 29...Ra3 30.Qf8? (better is 30.e4–/+) 30...Kc6–+ 31.Be8 (31.Rb1 b6 32.Bf5 Kb7–+) 31...Kb6 32.Rb1 (32.Bg6 Be2–+) 32...Ka7 33.Rb2 (33.Kf1–+) 33...Rd3 34.Rb1 Re3! 35.a4 (35.fe3 Qg3) 35...Re2 36.a5 Nh3 37.Kh2 Nf2 38.Qg7 (38.Qc5 Qc5 39.Rb7 Bb7 40.Bg6 Ng4 41.Kh3 Rh2 42.Kg4 Qg5#) 0–1. pinecrest1981 – Voldemort, Live Game Caissa's Web, 2004.

3.Nf3 e6 4.e3 Qb6 5.b5 cb5 6.Bf8 Kf8 7.Nd4 (7.a3 a6=) 7...a6 8.Be2 Nf6 9.Nb3 Ke7 (9...Qd6 10.0–0=+) 10.d4 Re8 11.0–0 Kf8 12.Nc5 Nbd7 13.Na3? (better is 13.Nd3–/+) 13...Nc5–+ 14.dc5 Qc5 15.Qc1 Bd7 16.Nb1 Rac8 17.c3 Ne4 (17...b4 18.Qc2–+) 18.Bf3 Nc3 19.Nc3 Qc3 20.Qd1 Qf6 21.e4 de4 22.Be4 Bc6 23.Bc6 bc6 24.a4 c5 (24...Kg8!? 25.Qb3–+) 25.Qd6 Kg8 26.Qa6 ba4 27.Qa4 c4 28.Rac1 c3 29.Qd7 (29.Rfd1 Red8–+) 29...Red8 30.Qb5 c2 31.Qe2 Qb2 32.Ra1 (32.Qh5 Qb4–+) 32...Qc3 (better is 32...c1Q 33.Qb2 Qb2–+) 33.h4 (33.Rac1 Qd3 34.Qe5 Rd5–+) 33...Rd2 34.Qe1 (34.Qg4 Rcd8 35.Kh2 f5–+) 34...Rcd8 35.Rc1 Qd3 36.Qe3 Qe3 37.fe3 Rc8 (37...f5 38.e4–+) 38.Kh2 (38.Rf2 Rd1 39.Rf1 Rc1 40.Rc1 f5–+) 38...Re2 (better is 38...Rc3–+) 39.Rce1 (39.Rfd1–+) 39...Re1 40.Re1 (40...c1Q 41.Rc1 Rc1 42.Kg3–+) –+. pinecrest1981 – audionut, Live Game Caissa's Web, 2004.

2.a4 d5

(--> 1.b4 d5 2.a4 c6).

3.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.a4).

3.Bb2 Nf6 4.Nf3 Nbd7 5.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.a4).

3.e3 Bf5 4.Nf3 Nf6 5.Bb2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.a4).

3.Nf3 Nf6 4.Bb2 Nbd7 5.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.a4).

2.a4 Nf6

3.Bb2 a5 4.b5= Qb6 (4...d5 5.e3=) 5.e3 d5 6.c4 dc4 7.Bc4 Bd7 8.Nc3 e6 9.Nf3 Bb4 10.0–0 0–0 11.Qb3 cb5 12.ab5 Rc8 13.Ra2 (13.Na4 Qc7 14.Rfc1 Re8+–) 13...Bc3 (13...Qc5!? 14.Be2 Qf5=) 14.Bc3+= (worse 14.dc3 Ne4 15.Be2 Nc5=) 14...Rc5? Increasing the pressure on the isolated pawn on b5 (better 14...Qd8+=) 15.Bd4+– Rb5 (15...Qd6 16.Bc5 Qc5 17.Rfa1+–) 16.Bb6 Rb3 17.Bb3 Nc6 (17...a4 18.Rb1+–) 18.Ba4 (better 18.Rfa1!? Kf8+–) 18...Nb4 (18...Nd5 19.Rb2+–) 19.Raa1 Bc6 20.Bc6 Nc6 21.Nd4 Nd5 (21...a4 22.Nc6 bc6 23.Rfc1+–) 22.Nc6 Nb6 (22...bc6 23.Ba5 f6 24.f4+–) 23.Ra5 (23.Na5 Rb8+–) 23...Ra5 (23...bc6 24.Ra8 Na8 25.Rb1+–) 24.Na5 g6 25.Nb7 Nd5 (25...Kf8 26.Ra1+–) 26.Rb1 Kg7 27.Nd6 (27.Nd6 Ne7 28.Rb7+–) 1–0. RichardSommer (2020) – Neversummerraptor (2010), lichess.org, 2020.

3.Bb2 e6 4.e3 Bb4 5.Nf3 0–0 6.Be2 (6.Ne5 d6 7.Nd3 Ba5–/+) 6...d5 (6...d6 7.c3 Ba5 8.d4–/+) 7.0–0=+ Nbd7 8.c4 (8.d4 Qa5–/+) 8...b6 (8...dc4 9.Na3–/+) 9.Qb3 (9.d4 c5–/+) 9...Be7 (9...Bd6 10.cd5 Nc5 11.Qc2 cd5 12.d4–/+) 10.Nc3 (10.Qc2 dc4 11.Bc4 c5–/+) 10...Qc7 (10...dc4 11.Qc4 Nc5 12.d4–/+) 11.a5 (11.cd5 ed5 12.Rfc1 Re8=+) 11...Ba6 12.ab6 ab6 13.Ra3?? (13.d4!? dc4 14.Bc4 Bc4 15.Qc4–/+) 13...Nc5 (better is 13...Bc4 14.Bc4 Ba3 15.Ba3 dc4 16.Qc4 Ra3–+) 14.Qa2 Bc4 15.Ra8? Ba2–+ 16.Rf8 Kf8 17.Na2 Qa7 18.Bf6 Bf6 19.Nc3 Qa1 20.Rb1 Qa5–+ 21.h3 Bc3 22.dc3 b5 23.Rb4 Na6 24.Rb1 Qc3 25.Kh2 b4 26.Nd4 c5 27.Nb5 Qc2 28.Re1 Qd2 29.Ra1 Qe2 30.Ra6 Qb5 31.Ra8 Ke7 32.Ra7 Kf6 33.g4 b3 34.g5 Kg6 35.Rf7 Kf7 36.h4 b2 37.h5 b1Q (38.Kg2 Q5f1 39.Kg3 Qg1 40.Kh4 Qf2 41.Kg4 Qbf5#) 0–1. MIjares (2190) – Eralos (2090), ajedrez21.com, 2003.

3.Bb2 g6 4.c4 Bg7 5.e3 0–0 6.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.a4).

3.Nf3 d5 4.b5 e6 5.Bb2 Bd6 6.e3 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 Bd6 6.Nf3).

2.Bb2 e5

(--> 1.b4 e5 2.Bb2 c6).

3.e3 d6 (--> 1.b4 e5 2.Bb2 d6 3.e3 c6).

3.e4 d6 (--> 1.b4 e5 2.Bb2 d6 3.e4 c6).

3.Be5 Bb4 4.Bg7 Nh6 5.Bh8 Bc5 6.e3 Qh4 7.Nf3 Qb4 8.Bc3 Qa4 9.d4 Bb4 10.Qd2 a5 11.Bb4 ab4 12.Ng5 d5 13.Nh7 Bf5 14.Nf6 Kd8 15.e4 de4 16.Qh6 Qc2 17.Qf8 Kc7 18.Ne8 Kb6 19.Qb4 Ka7 20.Na3 Na6 21.Ba6 e3 22.Qb7# 1–0. Machete99 – guest1790, ICC, 2002.

3.Be5 Nf6 4.a3 d5 5.e3 Bd6 6.d4 Qe7 7.Nf3 Nbd7 8.Bd6 Qd6 9.Nc3 0–0 10.Bd3 h6 11.0–0 Re8 12.Re1 Ne4 13.Be4 de4 14.Nd2 f5 15.f3 Nf6 16.f4 Be6 17.Nf1 Nd5 18.Na4 b6 19.c4 Nf6 20.c5 Qc7 21.cb6 ab6 22.Ng3 g6 23.Qc2 Rec8 24.Nc3 b5 25.a4 Bc4 26.ab5 Ra1 27.Ra1 cb5 28.Rd1 (28.Ra6 Kg7 29.Qd2 Qe7+=) 28...Bd5 29.Nge2 Bc4 30.Qd2 Qd6 ½–½. Meisinger,Peter (1710) – Brunner,Hermann, T0002 DESC, 2000.

2.Bb2 e6

(--> 1.b4 e6 2.Bb2 c6).

3.a3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 c6).

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

3.a3 Nf6 4.e3 d5 5.Be2 Nbd7 6.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.Be2 e6 6.a3).

3.a3 Nf6 4.e3 Be7 5.Nf3 0–0 6.d4 d5 7.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6 7.d4).

3.a3 Nf6 4.Nf3 (--> 1.b4 e6 2.Bb2 c6 3.Nf3 Nf6 4.a3).

3.b5 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6).

3.c4 d5 4.cd5 cd5 (--> 1.b4 c6 2.c4 d5 3.cd5 cd5 4.Bb2 e6).

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

3.c4 Nf6 (--> 1.b4 c6 2.Bb2 Nf6 3.c4 e6).

3.c4 Nf6 4.a3 Be7 5.e3 d5 6.Nf3 Nbd7 7.d4 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6 7.d4 Nbd7).

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

3.c4 Nf6 4.b5 Be7 5.e3 0–0 6.Nf3 d5 7.a4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0–0 7.c4).

3.c4 Nf6 4.e3 d5 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 e6).

3.e3 d5 4.Nf3 Nf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6).

3.e3 d5 4.Nf3 Nf6 5.b5 Be7 6.a4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.a4 d5 5.e3 Be7 6.Nf3).

3.e3 Nf6 4.a3 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 c6 4.e3).

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

3.e3 Nf6 4.a3 d5 5.c4 Be7 6.Nf3 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6).

3.e3 Nf6 4.a3 d5 5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3).

3.e3 Nf6 4.a3 d5 5.Nf3 Be7 6.c4 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6).

3.e3 Nf6 4.a3 d5 5.Nf3 Be7 6.Be2 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.Be2 c6).

3.e3 Nf6 4.a3 d5 5.f4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.f4 e6 5.a3).

3.e3 Nf6 4.a3 Be7 5.c4 0–0 6.Nf3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6).

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

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

3.e3 Nf6 4.b5 Be7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 Be7 4.e3 c6).

3.Nf3 d5 4.e3 Nf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6).

3.Nf3 d5 4.e3 Nf6 5.a3 Be7 6.c4 0–0 7.d4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6 7.d4).

2.Bb2 h6

3.Nf3 Nf6 4.e3 Qb6 5.a3+= g5 (5...d6 6.Bd4 Qc7 7.Bf6 ef6 8.d4+=) 6.e4 (6.Bf6 ef6 7.d4 a5+=) 6...Bg7 (6...Ne4?? 7.Bd4 c5 8.Bh8 cb4 9.Qe2+–) 7.d4 (better 7.e5!? Nd5 8.c4=) 7...Ne4=+ 8.Qd3 (8.Nbd2 Nd2 9.Qd2 d6=+) 8...Nf6 (8...d5 9.c4–/+) 9.d5 (9.Be2 a5–/+) 9...g4 (9...cd5 10.Be2–/+) 10.Ne5 (10.Bd4 Qc7 11.Nh4 d6–/+ (11...cd5?! 12.Nf5 Bf8 13.Nc3=)) 10...d6 (10...cd5!? 11.Nc3 d6 12.Nd5 Nd5–/+) 11.Nc4–/+ Qc7 12.Bf6 (12.Nc3 0–0–/+) 12...Bf6 (12...ef6?! 13.dc6 Nc6 14.Nd6 Ke7 15.Nc8 Rac8 16.c3 Qe5 17.Qe2=+) 13.g3?? (better 13.Nc3–/+) 13...Ba1–+ 14.Bg2 Bg7 15.dc6 (15.Ne3 h5–+) 15...bc6 (15...Nc6 16.Nbd2–+) 16.Nc3 (16.h3 gh3 17.Bh3 Ba6–+) 16...d5 17.Nd5 Qb6 (better 17...cd5 18.Qd5 Be6 19.Nd6 ed6 20.Qa8 Qc3 21.Kd1 0–0–+) 18.Ndb6 (better 18.Ncb6 cd5 19.Nd5 Be5+–) 18...ab6 19.Bc6 (better 19.Nb6 Ba6 20.Bc6 (20.Na8?! Bd3 21.cd3 Bd4+–) 20...Nc6 21.Qd7 Kf8 22.Na8 Bc3 23.Kd1+–) 19...Kf8?? (better 19...Nc6 20.Nb6 Rb8 21.Nc8 Rc8=) 20.Ba8 (20.Qd8) 20...Nd7 (20...Ba1 21.Nb6 Be6 22.c4+–) 21.Nb6 Nb6 22.Qd8 1–0. Agiant – Feodorious, lichess.org, 2019.

3.g3 (3.Nf3 d5=) 3...d6 4.Bg2 e5 5.c4 Nf6 6.d4 Bf5 7.Nd2 (7.de5 de5 8.Qd8 Kd8=) 7...g6 (7...Qb6!?=+) 8.e4+= Bg4 9.Ngf3 Qb6 (9...d5 10.cd5 Bb4 11.Qb3 (11.de5 Ne4 12.Bc1 Qd5–+) 11...Bf3 12.Bf3 Bd2 13.Kd2 cd5 14.ed5+= (< 14.Qb7 Nbd7 15.Rhb1 de4=+)) 10.Qb3 d5 (10...Bf3 11.Nf3 Ne4 12.0–0+/–) 11.c5 Qc7 12.Ne5 b5?? (12...Be6!?+/–) 13.0–0 (13.ed5 Bg7+–) 13...a5? (better is 13...Be6+–) 14.ed5 a4 15.Qc2 a3 16.Bc3 Nd5 17.Ng4 Bg7 18.Rfe1 Ne7 19.Ne4 0–0 20.Rad1 Nd7 21.Nd6 Nf6 22.Nf6 Bf6 23.Rd3 Qd7 24.Qd2 Bg5 25.f4 Bf6 26.Qe2 Nd5 27.Bd2 Be7 28.Bd5 Bd6 29.Bf7 Rf7 30.cd6 Qd6 31.Qe6 Rd8 32.Bc3 c5 33.bc5 Qd5 34.Qd5 Rd5 35.Bb4 g5 36.c6 gf4 37.gf4 Rf4 38.c7 (38...Rg5 39.Rg3+–) 1–0. coloplayah (1930) – davidjensen (1880), net–chess.com, 2005.

2.Bb2 Nh6

3.c4 d5=.

3.e4 d5 4.Nc3 d4 5.Nce2 e5 6.f4 (6.c3 d3 7.Nc1 Bg4+=) 6...f6 (6...Bb4 7.fe5 Qh4 8.Ng3=) 7.Nf3 Bg4 (7...d3 8.cd3 ef4 9.Qb3=+) 8.fe5 Bf3 9.gf3 fe5 10.Rb1 (10.a3 a5=) 10...Be7 11.c4 0–0 12.Bh3 (12.Qb3 Nf7=+) 12...Bh4 (12...Rf3 13.Be6 Kh8 14.c5–/+) 13.Ng3=+ Na6 14.c5 Nf7 (14...Kh8 15.a3=+) 15.Qb3 Nc7 16.Rg1 a5 17.a3 ab4 18.ab4 Ra7 (18...Kh8 19.Bf5=+) 19.Ra1 Ra1 20.Ba1 Nb5 (20...Kh8 21.Bf5=+) 21.Bf1 Qa8 22.Bb2= Nc7 23.Kd1 Bg3 24.hg3 Rd8 25.Rh1 Rd7 26.Bc4 Qe8 27.d3 h6 28.Bc1 Re7 29.f4 Ne6 30.f5 Nc7 31.Rh4 Rd7 32.Bd2 Re7 33.Rg4 Kh7+/– 34.Bc1 Rd7 35.Be6 Re7= 36.Bf7 Qf7 37.Qf7+= Rf7 38.Rg6 Rd7 39.g4 Rd8 40.Rd6+/– Rb8 41.Bd2 Ne8 42.Re6 Nf6 43.g5 Ng4 44.gh6 gh6 45.Be1 Ra8 46.Re7 Kg8 47.Rb7 h5 48.Ke2 Ra2 49.Bd2 Ra8 50.Rb6 Rc8 51.Bg5 Rc7 52.Rb8 Kg7 53.Re8 Ra7 54.Re6 Rc7 55.f6 Kf8 56.Re7 Re7 57.fe7 Ke8?? 58.b5+– Nh6 59.b6 Kf7 60.Bh6 Ke7 61.b7 Kf6 62.b8Q h4 63.Qf8 Ke6 64.Qg7 h3 65.Bg5 h2 66.Qe7# 1–0. Edchess 2.30 – Edchess 1.0, 1995.

3.e4 d5 4.ed5 cd5 5.Nf3=.

3.e4 d5 4.ed5!? Qd5 5.Nc3=.

3.e4 f6 4.d4 d5 5.ed5 (5.Nd2 Nf7+=) 5...Qd5 (5...cd5 6.a3=) 6.Nc3 Qg5 (6...Qd6 7.a3+=) 7.Nf3 Qg6 8.h3 e6 9.a3 Bd6 10.Bc1 Nf5 11.g4 Ne7 12.Bd3 f5 (12...Qf7 13.g5+=) 13.Rg1 Qf7 14.gf5 ef5 15.Qe2 h6 (15...g6!?+/–) 16.Bc4+– Qh5? (better is 16...Qf6 17.Ne5 Rf8+/–) 17.Rg7 Kf8 18.Rf7 Qf7 19.Bf7 Kf7 20.Ne5 Kf6 21.Bf4 h5 22.0–0–0 Kg7 23.Qc4 Rf8 24.Rg1 Kh7 25.Qe2 Be5 26.Qh5# 1–0. pierre – niterider, ChessWorld.net, 2005.

2.b5 cb5

3.e3 b4 4.Bb2 Nc6 5.d4 (5.Nf3!?=+) 5...d5–/+ 6.c4 Nf6 (6...bc3 7.Nc3 Bf5 8.Qb3=+) 7.c5 (7.Nf3 Bf5–/+) 7...e6 (7...Bg4 8.Be2 Be2 9.Ne2–/+) 8.Bb5 Qa5 9.Bc6 (9.Bd3 Be7–/+) 9...bc6 10.Qd2 (10.Nf3!?–/+) 10...Ne4–+ 11.Qc1 Be7 12.f3 (better is 12.Nf3–+) 12...Bh4=+ 13.g3 Ng3 (13...b3 14.Nd2 Nd2 15.Qd2 Bd8 16.ab3 Qb5=+) 14.hg3 =+.

3.e4 Qa5 4.Nf3 Nc6 5.Nc3 b4 6.Nd5 Nf6 7.Nf6 gf6 8.Bc4 Rg8 9.0–0 d6 10.d4 Bg4 11.Be3 f5 12.h3 Bh5 13.ef5 Qf5 14.Kh2 Bf3 15.gf3 d5 16.Be2 e6 17.Qd2 Bd6 18.f4 0–0–0 19.Rg1 Ne7 20.Bg4 Qf6 21.c3 Ng6 22.cb4 Nf4 (22...Bf4?! 23.Bf4 Nf4 24.Rac1 Kb8 25.Rc3–/+) 23.Rac1 Kb8 24.Rg3 h5 25.Bf3 Qh4 (25...Qh4 26.Bf4 Bf4–+) 0–1. Andre,Ricardo – Davila,Oscar Alfredo (1730), BI–2009–F–00011, 2010.

3.e4 b4 4.a3 ba3 5.d4. Schild,Reinhard – Eisengraeber_Pabst,Axel, DESC, 2000.

2.c3 Qa5??

3.ba5+– b6 (3...e5 4.e4+–) 4.ab6 ab6 5.e3 Ba6 6.Ba6 Na6 7.Qe2 Nc7 8.Nf3 0–0–0 (8...Nf6 9.e4+–) 9.d4 Nf6 10.Bd2 (10.Ne5 Re8+–) 10...d6 11.0–0 (11.Ng5 Rg8+–) 11...Kb7 12.c4 e5 13.de5 de5 14.Nc3 (14.Ne5 Rg8+–) 14...b5 15.cb5 cb5 16.Rab1 Kb8 17.Rfc1 (better is 17.Nb5 Bc5 18.Qc4 Bb6+–) 17...Nd7 18.Be1 (18.Nb5 Na8 19.Nc7 Ndb6 20.Qa6 Bc5 21.Rc5 Nc7 22.Rb6) 18...Nb6 19.h3 (19.Nb5!? Nca8+–) 19...f5 20.Nd2 (20.Nb5 Nca8 21.Bc3 Rd7+–) 20...Bd6 21.Nb3 e4 22.Rd1 h6 23.g3 Rhe8 24.Kg2 g5 25.Ra1 f4 26.ef4 gf4 27.Ne4 fg3 28.fg3 Bf8 29.Rd8 Rd8 30.Rd1 Rd1 31.Qd1 Bb4 32.Bb4 Nbd5 33.Qd5! Nd5 34.Kf3 Nb4 35.Nd4 Na2 36.g4 b4 37.Nd2 b3 38.N2b3 Nc1 39.Nc1 Kc7 40.Nd3 Kd6 41.Ke3 h5 42.gh5 1–0. Fournier,Frederic (1790) – javiverde (1885), Active, 2011.

3.ba5+– e5 4.Bb2 d5 5.e3 Bf5 6.Nf3 Bc5 (6...Bg4 7.h3 Bf3 8.Qf3+–) 7.d3 (better is 7.Ne5!? Bd6 8.Qb3 Be5 9.Qb7 Ne7+–) 7...Nd7 8.Be2 0–0–0 (8...Ngf6 9.d4 Bd6 10.c4+–) 9.Nbd2 h5 (9...Ngf6 10.0–0+–) 10.0–0 h4 11.h3 g5 (11...Ngf6 12.c4 e4 13.Ne1 dc4 14.de4 Ne4 15.Ne4 Be4 16.Bc4+–) 12.e4 de4 13.de4 Be6 (13...Bg6 14.Ng5 Be7 15.Ngf3+–) 14.Qc2 (better is 14.Ng5 Nf8+–) 14...g4 15.hg4 Bg4 16.Nh2 (better is 16.Nb3 Bf3 17.Bf3+–) 16...Be2 17.Rfe1 Bg4 (17...Ba6+–) 18.Ng4 h3 19.gh3 (19.Nf3 f6+–) 19...Ngf6 (19...Rh3 20.Kf1+–) 20.Nf6 Nf6 21.Kf1 Rhg8 22.Qd1 Bf2 23.Re2 Bd4 24.cd4 ed4 25.Nf3 Ng4 26.hg4 Rh8 27.Kf2 Rdg8 28.Bd4 Rg4 29.Bh8 Kc7 30.Re3 Rg1 31.Qg1 (31.Qg1 b6 32.Qg8 f6 33.Qh7 Kd6 34.Rd1 Kc5 35.Qf5 Kc4 36.Rd4; 31.Be5 Kc8 32.Qd6 Rg2 33.Kg2 c5 34.Qc7) 1–0. Fournier,Frederic (1915) – alpope (1675), Active Blind, 2008.

3.ba5+– e5 4.e4 +–.

2.c3 a6

3.Bb2 Nh6 4.e3 b5 (4...e5 5.Nf3 e4 6.Nd4=) 5.a3 (5.a4 ba4 6.Nf3 Qb6+=) 5...e6 6.Nf3 f6 7.d4 Nf7 8.Bd3 d5 9.Nbd2 Nd7 10.Qc2 Bb7 (10...e5 11.e4+=) 11.0–0 Bd6 12.Rfe1 Qc7 13.Rac1 (better is 13.e4 e5 14.a4+=) 13...Bh2?? (better is 13...f5=) 14.Nh2+– g5 15.Nhf3 (15.Bh7 f5+=) 15...h5 16.Kf1 (better is 16.e4!? e5+–) 16...h4 17.Ke2 f5 18.Kd1 Rh7? 19.Nb3 g4 20.Nfd2 g3 21.fg3 hg3 22.Nf1 Ke7 23.Be2 Rah8 24.Qd3 Rh2? 25.Nh2 gh2 26.Rh1 c5 27.bc5 a5 28.Bf3 b4 29.ab4 a4 30.Na5 Ba8 31.Ra1 e5 32.de5 Nde5 33.Qe2 Nf3 34.Qf3 d4 35.Qf2 de3 36.Qe3 Kf8 37.Kc1 Rg8?? 38.Kb1 Bg2 39.Ka2 Bh1 40.Rh1 Rg1 41.Rg1 hg1Q 42.Qg1 Qa5 43.ba5 1–0. Fournier,Frederic – hardware, Active Blind, 2008.

3.Bb2 Nh6 4.e3 d6 5.Nf3 f6 6.d4 Nf7 7.Bd3 e6 8.Nbd2 Nd7 9.0–0 b5 10.a3 Bb7 11.h3 (11.c4 Be7+/–) 11...Qc7 12.Qc2 0–0–0 (12...c5!?+=) 13.Rfe1 g5 14.e4 (14.c4 Re8+/–) 14...Bg7 (14...h5 15.Nh2+/–) 15.e5 (better is 15.c4+–) 15...fe5= 16.de5 (16.a4 Nb6=) 16...Nfe5 17.Ne5 Ne5 (worse is 17...de5 18.c4+/–) 18.Be2 Rhf8 19.Nf3 g4 (better is 19...Qf7!?–/+) 20.Ne5= Be5 (worse is 20...de5 21.Bg4 Qd7 22.Qh7+–) 21.hg4 (21.Bg4 Qf7=) 21...Rf7 22.Bf3 Rdf8 23.Rad1 c5+= 24.Bb7 Qb7 25.bc5? dc5?? 26.c4?? Bb2 27.Qb2 Rf2 28.Qf2 Rf2 29.Kf2 bc4 30.Kg1 Kb8?? 31.Kh1?? Ka7 32.Rc1 Qb6 33.Red1? Qb7 34.Rd2?? Kb6?? 35.Rdc2?? Kc6 36.Rc4 Qc7?? 37.a4 a5?? 38.Rc5+– (38.Rc5 Kd6 39.Rc7+–) 1–0. Fournier,Frederic (1950) – hardware (1870), Active Blind, 2008.

3.Bb2 Nh6 4.e3 e5 5.Nf3 e4 6.Nd4=.

2.c3 d5

(--> 1.b4 d5 2.c3 c6).

3.Bb2 Bf5 4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.c3).

2.c3 Nf6

3.Ba3 Qb6 4.e3 d5 5.Bd3 (5.Nf3 Bf5=+) 5...g5 (5...e5 6.Be2–/+) 6.Qf3 (6.Be2 g4=+) 6...g4=+ 7.Qf4 h5 (7...Nbd7 8.Bf5=+) 8.Qe5 (8.Ne2 h4=+) 8...Nbd7 9.Qg5 (9.Qd4 Qd4 10.ed4 e5–/+) 9...Bh6 (9...h4 10.Bf5=+) 10.Qh4=+ Ne5 11.Be2?? (11.Bc2 Ne4 12.Be4 de4–+) 11...Bf5 (better is 11...Ng6 12.Qf6 ef6–+) 12.Qg3 (12.d4 Ng6 13.Qf6 ef6–+) 12...Nfd7 13.b5 cb5 14.Bb4 0–0–0 15.Na3? Bg5 16.h4–/+ Bf6 17.Nb5 Nd3 18.Bd3 Bd3 19.a4 Be5 20.f4 Bd6 21.a5?? Qa6?? 22.Nd6 ed6 23.f5 Qc6 24.Bd6 Nf8 25.Bf8 Rhf8 26.a6 b6 27.Qf4 Qd6 28.Qg5?? b5 29.Qh5?? Rh8 30.Qg4+– Rhg8 31.Qh3 Rg3 32.Qh2 Bf5 33.h5 Rdg8? 34.h6 Be4? 35.h7 Rh8+= 36.Qh6 Kc7?? 37.Rh5?? Rh7 38.Qf4?? Rh5 39.Qf7= Kc6 40.Qb7 Kc5= 41.Qa7 Kc4=+ 42.Qd4 Kb3 43.Qb4?? Qb4–+ 44.cb4 Rh1 45.a7 Rg1 46.Kf2 R3g2 0–1. kingsteel – abe, Live Game Caissa's Web, 2004.

3.e3 b5 4.Nf3 e6 (4...a5 5.Bb2=) 5.Bb2 Be7 6.d4 (6.a4 ba4 7.Qa4 d6=) 6...0–0 (6...a5 7.a4 ab4 8.ab5 Ra1 9.Ba1+=) 7.Bd3 (7.a4 Ba6=) 7...h6 (7...a5 8.a3=) 8.Nbd2 (8.a4 Ba6+=) 8...Bb7 9.h3 (9.a4 a5+=) 9...Qc8 (9...a5 10.ba5 Qa5 11.0–0=) 10.a3 d6 11.0–0 Nbd7 12.Qc2 a6 13.Rfe1 Rb8 14.Rac1 c5 15.dc5 dc5 16.Qb1 cb4 (better is 16...c4!? 17.Bc2 Rd8+=) 17.cb4+= Qd8 18.Ne4 Ne4 19.Be4 Be4 20.Qe4 Nf6 21.Qb1 Rc8 22.Rc8 Qc8 23.Rc1 Qd7 24.Rd1 Qc8 25.Bf6 Bf6 26.Qc2?? Qc2–+ (26...Qc2 27.Re1 Qb3–+) 0–1. Fournier,Frederic (1820) – jaguar76 (1940), Active, 2011.

3.e3 d5 4.Bb2 e5 5.Nf3 Bd6 6.d3 0–0 7.Nbd2 Nbd7 8.Be2 Bc7 9.Qc2 a5 10.0–0 ab4 11.cb4 b6 (better is 11...Qe7!?+=) 12.a3 1–0. Fournier,Frederic (1865) – rayo78 (1890), Active blind, 2011.

3.e3 e5 4.Be2 +=.

2.Nc3 a5

3.b5 d5 4.e3 e5 5.Nf3 e4 6.Nd4 Nf6 7.a4 (7.bc6 Nc6 8.Ncb5 Bg4+=) 7...Bb4 8.bc6 bc6 9.f3 0–0 10.Be2 ef3 11.Bf3 Bc3 12.dc3 Ba6 13.Kf2 Qc7 14.Ba3 Re8 15.Nf5 (15.Rb1 Bc4–+) 15...Qe5–+ 16.g4 g6 17.Bd6 Ne4 (17...Qc3 18.Ne7 Kg7 19.g5+=) 18.Be4 Qe4 19.Nh6 Kg7 20.Bf4 Nd7 21.Qd4 f6 22.Kg3 Qc2 23.Rhc1 Qe4 24.Rab1 Qd4 25.cd4 Rac8 26.h4 White plans g5 26...Re4 27.g5 c5 28.dc5 Rc5?? (better is 28...Rc6–/+) 29.Rc5+– Nc5 30.Rb8 fg5 (30...Bc8 31.Rc8 Re3 32.Kg2 fg5 33.hg5 Re2 34.Kh3 Rh2 35.Kh2 Na4 36.Be5) 31.hg5 (31.hg5 Re3 32.Kh4 Rh3 33.Kh3 Bc8 34.Rc8 Na4 35.Be5) 1–0. Anonymous – Anonymous, sv.lichess.org, 2011.

3.Nf3 ab4–/+ 4.Bb2? bc3–+ 5.g4 cb2 6.Rb1 Ra2 7.c4 Qa5 8.Nd4 Ra1 9.f4 Qa2 10.Rg1 Rb1 11.Rg2 Rd1 12.Kf2 b1Q 13.Nf3 Rf1 14.Kg3 h5 15.gh5 Nf6 16.f5 Qf5 17.d3 Qg4# 0–1. tsaunders – elmoe (2000), net–chess.com, 2004.

2.Nc3 a6

3.d4 b5 4.e4 e6 5.e5 (5.a3 a5 6.Rb1 ab4 7.ab4 d5=) 5...g6 (5...Bb4!? 6.Bd2 d5=+) 6.Nf3 (6.Rb1 a5 7.ba5 Ba6+=) 6...h6 (6...Bb4 7.Bd2=) 7.h4 (7.a3 a5 8.ba5 Qa5+=) 7...f6 (7...Bb4 8.Bd2=) 8.g4 (better 8.a3!?+=) 8...f5 9.gf5 ef5 (9...Bb4 10.Bd2 ef5 11.Ne2=) 10.h5 (10.a3 a5 11.ba5 d5+=) 10...g5 (10...Bb4 11.Bd2 g5 12.Bg2=+) 11.Bd3 (11.a3 a5 12.ba5 Qa5=) 11...d5 (11...Bb4 12.Bd2 d6 13.Ne2 Bd2 14.Qd2–/+) 12.ed6 Bd6 13.Qe2 Ne7 14.Bd2 (14.a3 a5 15.Rb1 0–0=+) 14...0–0 (14...Bb4 15.Rb1 a5 16.Qe3–/+) 15.a3=+ Re8 16.0–0–0? (16.0–0 a5=+) 16...Nd5 (better 16...a5!?–+) 17.Qf1 (17.Ne5 Nc7=) 17...Nf6 (17...Nf4!?–/+) 18.Qg2 Ra7 19.d5 (19.Ng5 hg5 20.Bg5 Rg7=) 19...cd5=+ 20.Be3 Nh7?? (20...Rf7!?=+) 21.Nd5 (better 21.Ba7 Nc6 22.Be3+–) 21...Rb7 (21...Rf7 22.Bb6 Qd7 23.Rhe1=) 22.Bd4 (22.Rhe1 Rf8+–) 22...Be6 23.Ne5?? (23.Ne3 Qc8+=) 23...Rg7?? (better 23...Be5!? 24.Be5 Bd5 25.Bc4 bc4 26.Rd5–+) 24.Nc6?? (better 24.Ng4! fg4 25.Bh7 Rh7 26.Nf6 Kf7 27.Nh7+–) 24...Nc6–+ 25.Bg7 Kg7 26.Nc3 (better 26.Ne3 Nd4 27.Rhe1–+) 26...Ne5?? (26...Qc8 27.Ne2 Qc7 28.Rhe1–+) 27.Be2? (better 27.Bb5!? Re7 28.Ba6–/+) 27...Nc4 (27...Qc7 28.Nd5 Bd5 29.Qd5–+) 28.Qb7 (28.Bc4 bc4 29.Qb7 Bf7 30.Qa6 Bf4 31.Kb2 Qf6–+) 28...Re7 29.Qa6 Bf4 30.Kb1 Nd2 31.Kb2 Nf6 32.Nb5? (32.Qb5 Qc7 33.f3 Be5–+) 32...Be5 (better 32...Nfe4 33.c4 Nf2–+) 33.c3?? (better 33.Kc1 Nfe4 34.Rh3 Nf2 35.Rd2–+) 33...Qd5 34.Kc2 (34.Kc1 Bf4 35.Qd6 Bd6 36.Nd6–+) 34…Qa2 (34...Qa2 35.Kd3 Bc4 36.Ke3 Nd5) 0–1. warrior23 – patrick317, gameknot.com, 2018. (=1.Nc3 c6 2.b4 a6)

3.Nf3= d6 (3...d5 4.e4=) 4.e3 (4.e4 e5+=) 4...g6 (4...Nf6 5.e4=) 5.Bb2 (5.Be2+=) 5...c5 (better is 5...Bg7!?=) 6.bc5+/– dc5 7.Bc4 (7.Ne4 f6+/–) 7...e6 (better is 7...Bg7!?+=) 8.Ne4+– g5?? (better is 8...f6 9.Nfg5! Qe7+/–) 9.Bh8 (9.Nfg5 b5 10.Nf7 Kf7 11.Qh5 Ke7 12.Bh8 h6+–) 9...g4 (9...b5 10.Bf1 g4 11.Nfg5+–) 10.Nfg5 e5 (10...h5 11.a4 Be7+–) 11.Bf7 (11.Bf7 Ke7 12.Bg8+–) 1–0. marre – miniUm1, internet, 2010.

2.Nc3 Qb6

3.a3= Nf6 4.Nf3 g6 5.e4+= Bg7 6.d4 0–0 7.Be3 d5 8.Bd3 (8...de4 9.Ne4 Ne4 10.Be4=). maz_manchester – FatMaHa, ChessWorld.net, 2005.

3.Rb1 a5 4.b5+= e6 (4...Qd8 5.e4+=) 5.bc6 Qc6 6.Nf3 (6.e4 Bb4 7.Nge2 Nf6+=) 6...Na6 (6...Nf6 7.Bb2+=) 7.e3 (7.e4 Bb4 8.Bb5 Qc5+=) 7...Nc5 (7...Nf6 8.Bb2+=) 8.Bb5 (8.Ne5 Qc7 9.d4 Nf6+/–) 8...Qc7 9.d4 Na6 10.Bb2 (10.Bd2 Nf6+/–) 10...Nb4 (10...Nf6 11.0–0+=) 11.a3 Nd5 (11...Nc6 12.d5 Na7 13.de6 fe6 14.Nd4 Nb5 15.Qh5 Kd8 16.Qg5 Ne7 17.Ncb5+/–) 12.Nd5 ed5 13.c4! dc4 14.Ne5 c3 (14...Nf6 15.Bc4 d5 16.Qa4 Kd8 17.Bb5+/–) 15.Rc1 (15.Qb3 Nh6 16.Rc1 Qd8 17.Rc3 Bd6+–) 15...Bd6 (15...Qb6!? 16.Qb3 Qe6 17.Qe6 fe6 18.Rc3 Nf6+/–) 16.Rc3+– Qb6?? (better is 16...Qd8 17.Qg4 Be5 18.de5 Kf8+–) 17.Qb3 a4 (17...Be5 18.Bd7! Bd7 19.Qb6 Bf6+–) 18.Rc8! Rc8 (18...Rc8 19.Qf7 Mate attack) 19.Qf7 Kd8 20.Qd7# 1–0. b4player – oppo, internet, 2009.

3.Rb1 d5 4.e4 de4 5.Ne4=.

3.Rb1 Nf6 4.Nf3 (4.e4 e5=) 4...d6 (4...d5 5.a3=) 5.e3 (5.e4 d5 6.e5 Ne4 7.Ne4 de4+=) 5...g6 (5...e5 6.b5 c5 7.Bc4=) 6.Bb2 Bg7 7.Bd3 (7.b5 0–0=) 7...0–0 (7...Qb4 8.Ne4 Qa4 9.Bf6 Bf6 10.Nf6 ef6 11.Rb2+=) 8.0–0 Qc7 (8...e5 9.b5=) 9.h3 (9.b5 d5=) 9...e5 10.Ba3 (10.b5 d5 11.Be2 e4=) 10...Re8 11.e4 Nbd7 (11...d5 12.b5=) 12.b5 Nh5 (12...a6 13.bc6 Qc6 14.Qe2=) 13.bc6 bc6 14.Bc4 Nf4 15.Ng5 d5 (better is 15...Re7!?=) 16.ed5+/– cd5 17.Bd5 Nd5 18.Qf3 N7f6 19.Nd5 Nd5 20.Qd5 Ba6 21.d3 Rad8 22.Qb3 h6 23.Ne4 Kh7 (23...Re6 24.Bb4+/–) 24.Qa4 Bb7? (better is 24...Bc8!?+/–) 25.Nd6!+– Bc6 (25...Rd6 26.Qb4 Double attack (26.Qe8 Deflection; 26.Qb4 Decoy)) 26.Ne8 Re8 (26...Ba4?? 27.Nc7 Bc2 28.Rb7+–) 27.Qc4 1–0. b4player – oppo, internet, 2009.

2.Nc3 e6

3.a3 d5=.

3.b5 c5 4.Na4 Nf6 5.Ba3 Qa5 6.c4 d5 7.Bc5= Bc5 8.Nc5 dc4 9.Rc1 Qb5 10.Na4 0–0 11.Nc3 Qe8 12.e3=+ b6 13.Qf3 Nc6=+ 14.Nh3 Bb7–/+ 15.Qf4 e5 16.Qf5 Qe7 17.Ne4? Ne4–+ 18.Qe4 Nb4 19.Qc4?? Rac8 20.Qc8 Rc8 21.Rc8 Bc8 22.a3 Nc2 23.Kd1 Na3 24.Bd3 b5 25.Ke2 b4 26.Rc1 Be6 27.f4 ef4 28.Nf4 g5 29.Nh5 b3 30.Bb1 Nb1 31.Rb1 a5 32.d4 a4 33.e4 Bc4 34.Ke3 a3 35.e5 a2 36.Rc1 b2 37.Rc4 Qb7 38.Nf6 Kh8 39.d5 b1Q 40.Kd4 Q7b6 (41.Rc5 a1Q 42.Ke3 Qc3 43.Kf2 Qbe1#; 40...a1Q 41.Ke3 Qe1 42.Kf3 Qad1#) 0–1. Jolilein – Sanji, mySchach.de, 2005.

3.b5 d5 4.Nf3 =+.

3.d4 Bb4 4.Bd2 d5–/+ 0–1. Robbie101 – Rudolf, internet, 2007.

2.c4 Qc7

3.Bb2 d6 4.d4 e5 5.de5 (5.e4 ed4 6.Bd4 c5 7.bc5 dc5=) 5...de5 6.c5 (6.a3 Bf5=) 6...Bg4 (6...b6 7.Nf3 Nd7 8.e4+=) 7.Nd2 (7.h3 Bf5=) 7...Nf6 8.Ngf3 Nbd7 9.e3 Be7 10.Be2 Nd5 11.Qb3 0–0 (11...a5 12.a3 ab4 13.ab4 Ra1 14.Ba1 b6=) 12.Nc4 (12.Bc4 Rad8=) 12...Bf6 (12...e4 13.Nd4 Be2 14.Ne2–/+) 13.Nd6 (13.h3 Be6+=) 13...b6 14.Nb5 cb5 15.Qd5 bc5 16.bc5 (16.Bb5 e4 (worse is 16...cb4 17.Bd7 Bd7 18.Be5–/+) 17.Bf6 Nf6 (17...ef3 18.Bd7 fg2 19.Rg1+–) 18.Qc5 Qc5 19.bc5 ef3–+) 16...Nc5 (16...Bf3 17.gf3 Nc5 18.f4–+) 17.Rc1–/+ Qa5 (17...Rac8 18.Qd2–+) 18.Qd2 (18.Bc3 Qa3 19.Bd2–+) 18...b4–+ 19.0–0 (19.Be5 Bf3 20.Bf3 Be5 21.Ba8 Bc3 (21...Ra8?! 22.Qd5 b3 23.Ke2 Qa6 24.Kf3–/+) 22.Rc3 bc3–+) 19...Rad8 (19...Rfd8 20.Qc2 Qa2 21.Qc5 Qb2 22.Rc2–+) 20.Qc2 Bf3 21.gf3 Na4 22.e4 Bg5–+ 23.Rcd1 Nc3 24.Bc3 bc3 25.Rd8 Rd8 26.Rd1 Bd2 27.Rb1 Qc7 28.Bd1 Qe7 29.Kf1 Qh4 30.Qa4 Qh2 31.Bc2 Bg5 32.Rd1 Rd1 33.Bd1 Qh1 34.Ke2 g6 35.Qe8 Kg7 36.Qe5 Bf6 37.Qc5 Qh6 38.Qe3 Qe3 39.fe3 h5 40.f4 Bh4 41.e5 Bg3 42.Kf3 h4 43.Kg4 Be1 44.Bc2 Kf8 45.e6 fe6 46.Bg6 Ke7 47.Bc2 Bd2 48.e4 h3! 49.Kh3 Bf4 50.Kg4 e5 51.Kf3 Kd6 52.Ke2 Kc5 53.Kd3 Kb4 54.a3 Ka3 55.Kc3 Bg3 56.Kc4 Bf2 57.Kc3 a5 58.Kc4 Be1 59.Bd1 Kb2 60.Ba4 Kc1 61.Kd3 Bb4 62.Bb3 Kb2 63.Kc4 Ka3 64.Bd1 Kb2 65.Ba4 Kc1 66.Kd3 Bc5 67.Kc4 Bf2 68.Kd3 Kb1 69.Kc3 Be1 70.Kd3 Ka1 71.Kc4 Ka2 72.Bd1 Ka3 73.Bc2 Kb2 74.Ba4 Bd2 75.Bd1 Bg5 76.Ba4 ½–½. Fournier,Frederic – Nguyen Huu Hoang, Open \ Paris FRA, 1998.

3.Bb2 e6 4.a4 Bb4?? (better 4...Na6=+) 5.Bg7+– f6 (5...Nf6 6.Bh8 Qe5 7.Ra2+–) 6.Bh8 Kf7 (6...Na6 7.Nf3+–) 7.Qc2 f5 8.Qb2 (8.Qb2 Bf8 9.Nf3+–) 1–0. DEFFM – GuestMBWC, freechess.org, 2019.

3.Bb2 Nf6 4.e3 (4.Nf3 d6=) 4...g6 (4...e5 5.a3=) 5.Nf3 Bg7 6.Be2 0–0 7.0–0 d5 8.cd5 cd5 9.a3 e5? (better is 9...Bg4=) 10.Be5+– Qd7 11.Bb2 Nc6 12.d4 Ne4 13.Nbd2 Nf6 (13...a6 14.Qc2 Qe7 15.Ne4+–) 14.Rc1 Ng4 15.h3 Nf6 16.Bd3 a5 17.b5 Ne7 18.Ne5 Qd6 19.Ndf3 (19.Qc2 Nd7+–) 19...Ne4 20.Qc2 Bd7? (20...f6 21.Nc4! Qe6 22.Ncd2+–) 21.a4 (better is 21.Qc7 Be8 22.a4+– (22.Qb7?! Rb8 23.Qc7 Bb5+/–)) 21...Rfc8 22.Qb1 Rc1 23.Rc1+– Nc8? 24.Nd7 Qd7 25.Be4 de4 26.Qe4 Nd6 27.Qd5 Rd8 28.Qc5 Bf8 29.Qc7 Qe6 30.Ne5 Rc8 31.Qa5 Rc1 32.Bc1 Ne4 33.Qc7 Qf5 34.Nf3 Qd5 35.Qc2 Qf5 36.g4 Qd5?? 37.Nd2 Ng5 38.Kh2 Bd6 39.f4 Nf3 40.Nf3 Qf3 41.Qg2 Qd1 42.Bd2 g5 43.a5 gf4 44.ef4 Qa4 45.b6 Qd4 46.Kg3 Qd3 47.Kh2 Qe4?? 48.Qe4+– Bf4 (48...Bf4 49.Bf4 h5 50.Qe8 Kg7 51.gh5 f6 52.h6 Kh7 53.Qf7 Kh8 54.Qg7). Fournier,Frederic – ASUAT78, Partie evaluee, 5m + 0s, 2007.

3.e3 g6 (3...e6 4.a3=) 4.Bb2 Nh6?? (better 4...Nf6=) 5.Bh8+– f6 6.Qf3 (6.Nc3 Nf7+–) 6...d6 (6...Kf7 7.Nc3 Kg8 8.Bf6 ef6 9.Qf6 Bb4 10.Nf3+–) 7.Bf6! ef6 8.Nc3 (8.Qf6?! Bg7 9.Qh4 Ba1 10.Qh6 a5+–) 8...f5 (8...Na6 9.a3 Kf7 10.Bd3+–) 9.Be2 Qg7 (9...Na6 10.Rb1+–) 10.Nh3 Nd7 11.0–0 (11.b5 Ng4+–) 11...Ne5 12.Qf4 g5 (12...Be7 13.Qg3+–) 13.Ng5 Nhg4 14.d4 (better 14.b5+–) 14...Nc4 (14...Be7 15.Nf3 Ng6+–) 15.Bc4 d5 (15...a5 16.b5+–) 16.Nd5! cd5 17.Bd5 h6 (17...Be7 18.Bf7 Kf8 19.Ne6 Be6 20.Be6+–) 18.Ne6 Qf6 (18...Qg6 19.Nf8 Kf8 20.Rac1+–) 19.Nc7 Ke7 (19...Kd8 20.Na8 Bd6+–) 20.Na8 b5 21.h3 Nf2 22.Rf2 (22.Rac1 Bd7 23.Rc7 Nh3 24.gh3 Qg5 25.Qg5 hg5 26.Ra7 f4 27.Nb6 Bg7 28.Rd7 Kf6 29.Rc1 Kg6 30.Rc6 Kh7 31.Be4 Kg8 32.Rc8 Bf8 33.Bd5 Kh8 34.Rf8) 22...h5 23.Qc7 Bd7 24.Rf5! Qf5 (24...Qf5 25.Qc5 Double attack (25.e4 Passed pawn)) 25.e4 Qg6 26.e5 Qd3 27.Qd6 Kd8 28.Qf8 (28.Qf8 Be8 29.Qd6 Bd7 30.Qf6 Kc8 31.Qf8 Be8 32.Qe8) 1–0. GuestKBLD – GuestWVFT, freechess.org, 2020.

2.c4 f6

3.e3 e5 4.a3=.

3.e3 f5 4.Qh5 g6 5.Qd1 g5?? (5...e5!? 6.a3 Bg7=) 6.Bb2 (6.Qh5) 6...a5?? (better 6...Nf6+=) 7.Qh5 1–0. GuestNMCL – Lavantae, freechess.org, 2017.

3.e3 g6 4.Bb2 e5 5.b5 d6 6.Nf3 c5 (6...Ne7!?+–) 7.Nc3 Be6 8.Qc2 b6 (8...Nd7!?+–) 9.Bd3 Ne7 (9...Nd7 10.h4+–) 10.0–0 (10.Be4 Nd7 11.Ba8 Qa8+–) 10...f5 (10...Nd7+–) 11.Ng5 Qd7? (11...Bg8 12.e4 h6 13.Nf3+–) 12.Ne6 (better 12.Be4!? fe4 13.Qe4 Bc4 14.Qa8 Qd8+–) 12...Qe6 13.Be4?? (better 13.f4 Nd7 14.Nd5+–) 13...fe4+– 14.Qe4 d5 15.Nd5 Nd5 16.cd5 (worse 16.Qd5 Qd5 17.cd5 Bg7–/+) 16...Qd7?? (better 16...Qf5 17.Qf5 gf5+=) 17.Qe5+– Qe7 18.Qh8 Nd7 19.a4 0–0–0 20.a5 Bg7 (20...Qf7+–) 21.Qg7 Qe4 (21...Qg7 22.Bg7 Kb7+–) 22.ab6 ab6 23.Ra8 Kc7 24.d6! Kd6 25.Rd8 Qb1 1–0. DEFFM – GuestCNXS, freechess.org, 2019.

3.e4 e6 (3...e5 4.a3=) 4.b5 Bc5?? (better 4...d5=) 5.Qh5+– g6 6.Qc5 b6 7.Qd6 Ne7 8.Nf3 c5 9.d4 cd4 (9...Bb7 10.d5+–) 10.Bh6 Bb7 11.Qd4 e5 12.Ne5! fe5 13.Qe5 Rg8 14.Nc3 d6 15.Qe6 Bc8 (15...Qd7 16.Qf6+–) 16.Qf6 Nd7 (16...a6 17.Rd1+–) 17.Qd6 Nc5 18.Qe5 Nd7 19.Qg3 Nc5 20.Rd1 Bd7 21.Nd5 (better 21.Bg5!? h6 22.Bh6 Rc8+–) 21...Nd5 22.Rd5 (22.ed5!? Qe7 23.Be2 g5+–) 22...Qf6 23.Re5 Be6 24.Bg5 Qf7 25.Be2 Rd8 (25...h6 26.Bh6 0–0–0 27.Qf4+–) 26.Bd8 Kd8 27.Rc5! bc5 28.Qb8 Ke7 (28...Bc8 29.0–0 Qb7 30.Qe5+–) 29.Qa7 Kf6 30.Qc5 Rc8 (30...Ra8 31.a3+–) 31.Qd4 Kg5 (31...Ke7 32.0–0+–) 32.h4 Kh6 33.g4 Qg7 (33...Bg4 34.Bg4 Rc4 35.Qe3 Kg7+–) 34.g5 1–0. DEFFM – GuestFDRL, freechess.org, 2018.

2.c4 g6

3.Bb2 f6 (--> 1.b4 g6 2.Bb2 f6 3.c4 c6).

3.Bb2 Nf6 4.a3 Bg7 5.e3 Nh5 (5...d6!?=) 6.Bg7+= Ng7 7.Nf3 0–0 8.d4 b6 9.Be2 Bb7 (9...d6 10.0–0+/–) 10.Nc3 Nf5 11.0–0 d6 12.Rc1 (12.e4 Ng7+/–) 12...Nd7 13.Ne4 (13.e4 Ng7+/–) 13...c5+= 14.Ned2 cb4 15.ab4 Rc8 (15...e5 16.Bd3+=) 16.Qa4 a6 17.Nb3 (17.Bd3 e5+/–) 17...Ra8 (17...Bc6 18.Qa2+/– (18.Qa6? Ra8 19.Qa1 Ra1 20.Ra1 Bf3 21.Bf3 Qc7–+)) 18.c5+/– b5 19.Qa5 Qa5 (19...Rc8 20.Rfd1+/–) 20.Na5 (worse is 20.ba5 Rfc8+=) 20...Bf3 (better is 20...Bd5!?+/–) 21.Bf3+– Rac8 22.Bb7 Rc7 23.Ba6 dc5 24.dc5 Ra7? 25.Bb5 Nb8 26.Bd3 e6 27.Bf5 ef5 28.c6 Rc8? 29.Rc5 Ra6? 30.Rfc1 Rc7 31.g3 Rb6 32.b5 Kg7 33.Nc4 Nc6 34.bc6 Rbc6 35.Rc6 Rc6 36.Kf1 Kf6 37.Ke2 Kg5 38.f3 Kh6 39.Kd3 Rc8 40.Kd2 Rd8 41.Kc3 Rc8 42.Rb1 Ra8 43.Rb2 Ra1 44.Ne5 Re1 45.Kd3 Rd1 46.Ke2 Rh1 47.Kd3 Rd1 48.Kc3 Rc1?? 49.Kb3 Rc8 50.Nf7 Kg7 51.Nd6 Rb8 52.Kc3 Rd8 53.Nc4 Rc8 54.Rb7 Kh6 55.e4 fe4 56.fe4 Re8 57.e5 Rf8 58.Kd4 Rd8 59.Ke4 Rc8 60.Nd6 Rc1 61.Rb2 Re1 62.Kd5 Rd1 63.Ke6 Rc1 64.Kf6 Rf1 65.Ke6 Rd1?? 66.Kd7+– Kg7 67.e6 Re1 68.e7 Re7 69.Ke7 Kh6 70.Rb5 Kg7 71.g4 h5 72.gh5 gh5 73.Rh5 Kg6 74.Ra5 Kg7 75.Ke6 Kg6 76.Ne4 Kg7 77.Rg5 Kf8 78.Rg6 Ke8 79.Rf6 Kd8 80.Rf7 Kc8 81.Kd6 Kb8 82.Kc6 Ka8 83.Kb6 Kb8 84.Rf8 1–0. Fournier,Frederic – JARNAU, Owl21.com, 2008.

3.Bb2 Nf6 4.e3 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 c6).

3.Bb2 Nf6 4.e3 Bg7 5.Nf3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6).

3.Bb2 Nf6 4.e4=.

3.Bb2 Nf6 4.Nf3 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 c6).

2.d3 e5

3.Bd2 d5 4.c4 Nf6 5.e3 Nbd7 6.Nf3 e4 7.de4 de4 8.Nd4 c5 9.Nc2? (better is 9.bc5!? Bc5 10.Nc3+=) 9...Ne5–+ 10.bc5 Bg4 11.Be2 Bc5 12.0–0 Be2 13.Qe2 Qd3 14.Qd3 ed3 (14...Nd3?! 15.Bc3 0–0–0 16.Nd4+=) 15.Nb4 Ne4 16.Nd5 0–0 17.Rc1 Rfd8 18.a3 f5 19.Nf4 Rd7 20.Ra2 Rc8 21.a4 Ng4 22.Nh3 Bd6 23.g3 Ne5 24.Nf4 Kf7 25.h4 Nc4 26.Nd3 Bg3 (26...Ncd2?! 27.Nd2 Rc1 28.Nc1–+) 27.fg3 Rd3 (27...Ncd2 28.Rc8 Rd3 29.Nd2 Nd2 30.Rc7 Kf6 31.Rb7+–; 27...Ned2 28.Nd2 Nd2 29.Rc8 Rd3 30.Rc7 Kg6 31.Rb2+–) 28.Rac2 Rb3 (28...Rd2 29.Nd2 Ned2 30.Rd2+–; 28...Ned2?! 29.Nd2 Nd6 30.Rc8 Nc8 31.Rc8 Rd2 32.Rc7 Ke6 33.Rg7=) 29.Kh2 Rb1! (29...Ned2 30.Nd2 Nd2 31.Rc8+=; 29...Ncd2?! 30.Rc8 Nf3 31.Kh3–+) 30.Rb1 Ned2 31.Rb7 Kg6 32.Rd7? (better is 32.Ra7 Nf1 33.Kh3 Nfe3 34.Re2–/+) 32...Nf1–+ 33.Kh3 Nfe3 34.Rc1 a5 35.Rd4 (35.Rb1 Ne5 36.Rb6 Kh5 37.Rg7 h6–+) 35...Kf6 36.Rf4 Nb6 (36...Ke5!? 37.Re1 Kd5 38.Rb1–+) 37.Rc8 Nc8 38.Rd4 Ke6 39.Kh2? (39.Rd8 Ne7 40.Ra8–+) 39...Nb6 40.Kg1 Ned5 41.g4 Ke5 (41...Ke5 42.Rd2 fg4–+) 0–1. Bouma – Smits, email CTON, 1996.

2.d4 d5

(--> 1.b4 d5 2.d4 c6).

3.e3 Nd7 4.Nf3 g6 5.Bb2 Bg7 6.Be2 Ngf6 7.Nbd2 0–0 8.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nbd2 Nbd7 8.Be2).

3.Nf3 Nf6 (--> 1.b4 Nf6 2.d4 d5 3.Nf3 c6).

2.d4 e5

3.de5 Bb4 4.c3 Bc5 5.e4 (5.Ba3 Na6 6.Bc5 Nc5=) 5...Qh4 (5...d5 6.ed5 Qd5 7.Qd5 cd5 8.Bb5 Bd7 9.Bd3=) 6.Qc2 Qe7 (6...d5 7.ed5 cd5 8.Bb5 Bd7 9.Bd3=+) 7.Nf3 d5 8.ed5 cd5 9.Bg5 Qc7 10.Nbd2 (10.Bb5 Bd7 11.Bd3 Nc6=) 10...Nc6 11.Bb5 (11.Qb3 Nge7 12.Be7 Ne7 13.Bb5 Kf8=) 11...Bd7 (11...Qb6 12.Bc6 Qc6 13.0–0=) 12.Bd3 (12.Qd3!?=) 12...Ne5 =+.

3.de5+= Bb4 4.c3 Be7 5.Nf3 (5.Bf4!?+=) 5...d5= 6.Bb2 (6.ed6 Bd6 7.e4 Qe7=) 6...Qb6 7.Qc2 Bg4 8.Nbd2 Nd7 9.c4 Bc5 10.e3 Bf3 (10...Bf5 11.Qf5 Qb2 12.Rb1 Qa2 13.Rb7+=) 11.Nf3 Qa5 (11...Bb4 12.Bc3=) 12.Nd2 (12.Bc3 Bb4 13.Bb4 Qb4 14.Qd2 Qd2 15.Kd2 dc4 16.Bc4=) 12...dc4 (12...Ne7!?=) 13.Bc4 (13.e6 fe6 14.Bg7 Be3 15.fe3 Rd8 16.Bh8 Ne5+–) 13...Nb6 +=.

2.d4 e6

3.a3 d5 4.Bb2 Nd7 5.Nf3 Nb6 6.e3 Nf6 7.Nbd2 Na4 8.Rb1 b5 9.Bd3 Bd6 10.0–0 h6 (10...a5 11.Ne5 Bb7 12.Ba1=) 11.Ba1 a5 12.c4 (12.e4 de4 13.Ne4 0–0+=) 12...Ba6 (12...dc4!? 13.Nc4 bc4 14.Qa4 Bd7 15.Bc4 ab4+=) 13.cb5 (13.c5 Bc7+=) 13...cb5 (13...Bb5 14.Bb5 cb5 15.Qe2=) 14.ba5 Rb8 (14...Qa5 15.Rb3=) 15.Nb3 (15.Ne5!? Rb7 16.Qc2+/–) 15...Ba3+= 16.Ne5 Qd6 17.Qe2 0–0 18.h3 Nd7 19.Rfd1 f6 20.Nd7 Qd7 21.Qg4 f5 22.Qe2 Bb4 23.Rdc1 Ba3 24.Rc2 Rfc8 25.Nc5 Bc5 26.dc5 Nc5 27.Bd4 Nd3–/+ 28.Qd3 Rc2 29.Qc2 Rc8 30.Qb2 Rc4 31.Rd1 Qc7 32.Bb6 Qd6 33.Qb1 Qb4 34.Qa1 Qc3 35.Bd4 Qa1 36.Ra1 h5 37.h4 g6 38.g3 Kf8 39.Kg2 Ke7 40.Kf3 Kd6 41.Bb6 e5 42.Rd1 Kc6 43.Rd2 b4 44.Ba7 b3–+ 45.Bb8?? Rc2 46.Rc2 bc2 47.Be5 c1Q 48.Bd4 Qd1 49.Kf4–+ Kd6 50.Be5 Kd7 51.Kg5 Qg4 52.Kf6 Bc8 53.Bf4 Kc6 54.Ke5 Bb7 55.Kf6 Kb5 56.f3 Qf3 57.Kg6 Qg4 (57...Qg4 58.Kf6 Ka5–+) 0–1. Karnek,Jan (1830) – Granec,Jan (1640), SVK–ch region, 2005.

3.c4 Bb4 4.Bd2 Na6 (4...Be7 5.e4–/+) 5.a3 Qa5 (5...Bd2 6.Nd2 d6 7.Ngf3=+) 6.Bb4 (6.Nf3 d6=+) 6...Nb4=+ 7.e4?? (better is 7.Nd2 Na6 8.c5=+) 7...Nc2–+ 8.Ke2 Na1 9.g4 (9.e5 d6 10.f4 de5 11.de5 Nh6–+) 9...Nf6 (9...d5 10.Qd3–+) 10.Nf3 (10.e5 Ng4 11.Nd2 Qc3–+) 10...Ne4 11.h4 (11.Qc1 Qb6–+) 11...Nc3 12.Nc3 Qc3 13.Nd2 Qd4 14.Bg2 Qg4 15.Ke1 Qg2 16.Rf1 Qh3 17.Qa1 f6 18.Kd1 d5 19.cd5 ed5 20.Re1 Kf7 21.Re3 Qh4 22.Re2 Bg4 23.Qd4 Be2 24.Ke2 Qd4 (25.Nf3 Rhe8 26.Kf1 Qc4 27.Kg2 Qg4 28.Kh1 Qf3 29.Kh2 Re1 30.a4 Rh1) 0–1. lucky bucky – coolerdude, ChessWorld.net, 2004.

3.Bd2 Nf6 4.Nc3 (4.Nf3!?=) 4...Bb4–/+ 5.Rb1 Bc3 (5...Qa5 6.Ne4 Ne4 7.Bb4 Qa2 8.f3=+) 6.Bc3 d5 7.Nf3 b6 8.e3 0–0 9.g3 (9.Bb4 c5 10.dc5 Nc6=+) 9...Nbd7 10.Bd3 Bb7 11.0–0 Ne4 12.Be4 Black gets in control (12.Bb4 c5 13.dc5 bc5–/+) 12...de4 13.Ne5 (13.Nd2 Ba6 14.Bb4 c5 (14...Bf1?! 15.Bf8 Bb5 16.Bd6–/+) 15.dc5 Bf1 16.cb6 Bh3 17.Bf8 Qf8–/+ (17...Kf8?! 18.b7 Rb8 19.Ne4–/+)) 13...f6 (13...Ba6 14.Nc6 Qc7 15.Ne7 Kh8 16.Rb3–+) 14.Nc4 (14.Nd7 Qd7 15.f3 ef3 16.Qf3 c5–/+) 14...Ba6 15.Rb4? (better is 15.Qe2–/+) 15...c5–+ 16.dc5 bc5 (16...Nc5?! 17.Bd4–+) 17.Rb3 (17.Ra4 Bb5 18.Ba5–+) 17...Bc4 18.Rb7 Rf7 19.Rd7 Rd7 20.Qc1 Bf1 21.Qf1 Rd1 22.Be1 Ra1 23.Kg2 Qd1 24.Qc4 Qf3 25.Kh3 Qf5 26.g4 Qf3 27.Kh4 g5 28.Kh5 Qh3 0–1. xzara – Whiterose, ChessWorld.net, 2005.

2.Nf3 Na6

3.a3 d5 4.Bb2=.

3.a3 e6 4.d4 Qf6 (4...Nf6!?+=) 5.e4+/– Nh6 (5...d5 6.e5 Qd8 7.Bd3+/–) 6.Nc3 (6.Bd3 d6+–) 6...b5 (6...Nc7 7.e5 Qg6 8.Bd3+–) 7.Bd3 (better is 7.e5 Qd8 8.Bh6 gh6 9.Ne4+–) 7...g6 (7...Nc7 8.e5 Qd8 9.Bh6 gh6 10.Ne4+–) 8.e5 (better is 8.Bg5 Qg7 9.e5+–) 8...Qf4?? (8...Qd8+–) 9.Bf4 Nb4 10.ab4 Ba6 11.Ra6 Bg7 12.Ne4 Nf5 13.g4 Nd4 14.Nd6 Ke7 15.Nd4 Kf8 16.Qf3 h6 17.Be3 f5 18.ef6 Bf6 (18...Re8 19.fg7 Ke7 20.Qf7 Kd8 21.Rc6 dc6 22.Nc6) 19.Qf6 Kg8 20.Qf7# 1–0. Trkn – guest5180, ICC, 2004.

3.a3 Nh6 4.e3 (4.e4 Nc7+/–) 4...Nc7+= 5.Bb2 (5.Be2 d6+=) 5...f6 (5...d6 6.Be2+=) 6.Bc4 (6.d4 d5+=) 6...d5= 7.Bb3 (7.Be2 e5=) 7...e5 8.Nh4 (8.0–0!?=) 8...Bg4 9.f3 Be6 10.0–0 (10…g5 11.f4 gh4 12.fe5–/+; 10.f4!? Bg4 11.Qc1–/+). Wartig,Wolfgang – Marder,Simon, corr 3GMM–42, 1995.

3.e4 Nb4= 4.c3 Na6 5.d4 e6 (5...Nc7 6.Bd3=) 6.Bd3 Bd6 (6...d5 7.Nbd2=) 7.Bg5 Be7 8.h4 (8.Be7 Ne7 9.Ba6 ba6=) 8...h6 9.Be3 (9.Be7 Ne7 10.Ba6 ba6=) 9...Nf6=+ 10.Nbd2 Qa5 11.Qc2 Ng4 (11...d5 12.e5 Ng4 13.Nb3 Ne3 14.fe3–/+) 12.Rb1 (12.Bf4 d6=+) 12...Qh5 (12...Ne3 13.fe3 d5 14.0–0=+) 13.Nc4 (13.Bf4!?=) 13...b5=+ 14.Nce5 Ne5?? (14...0–0 15.Ng4 Qg4=) 15.Ne5+– f5 (15...0–0 16.Be2 Qh4 17.Rh4 Bh4+–) 16.Be2 Qh4 (16...Qe2 17.Qe2 0–0 18.a4 ba4 19.ef5+–) 17.Rh4 Bh4 18.ef5 (18.Bh5!? Kf8 19.Ng6 Kg8 20.Nh4 d6+–) 18...0–0 19.fe6 de6 (19...d6 20.Ng6 Be6 21.Nh4+–) 20.Nc6 (better 20.Qg6!? Rb8 21.Bd3 Rf5+–) 20...Nc7 21.Bb5 (21.Qe4!? Bb7 22.Bb5 Rab8+–) 21...Nd5 22.Kd1 (22.Qe4!? Ne3 23.g3 Nd5 24.gh4 Rf4 25.Ne7 Kf7+–) 22...Bb7 (22...a6 23.Bc4 Bd7 24.Bd5 ed5 25.Rb6+–) 23.Ne5 (better 23.Bd2 Bf2 24.c4+–) 23...g5 (23...Rac8 24.Bd2 Rf2+–) 24.Qg6 Kh8 25.Qh6 Kg8 26.Qe6 Kh8 27.Nf7 (27.Qh6 Kg8 28.Bc4 a5 29.Rb7 Rf7 30.Qg6 Kh8 31.Nf7) 27...Kg7 28.Ng5 (better 28.Qh6 Kf7 29.Bc4+–) 28...Rae8 (28...Nc3 29.Kc1 Na2 30.Kd2 Rf2 31.Bf2 Bg5 32.Be3 Be4 33.Bg5 Nc3 34.Qf6 Kg8 35.Rh1 Nb1 36.Ke3 Bg2 37.Rh8) 29.Be8 Nc3 (29...Ne7 30.Qe7 Rf7 31.Qf7 Kh8 32.Qf8) 30.Kc2 (30.Ke1 Be4 31.Rb7 Rf7 32.Qf7 Kh6 33.Qh5) 30...Nb1 (30...Be4 31.Kc3 Re8 32.Rb7 Bb7 33.Qf7 Kh8 34.Qh7) 31.Qg6 (31.Qg6 Kh8 32.Qh7) 1–0. yodamo – maftei, ChessWorld.net, 2008. (=1.Nf3 c6 2.b4 Na6)

2.Nf3 b5

3.a4 a5 4.ab5 cb5 5.e4 (5.Bb2 Bb7=) 5...Qb6 (better is 5...Bb7!?=) 6.Nc3 Bb7 7.Rb1 (< 7.Bb5 ab4 8.Rb1 bc3 9.Bd7 Nd7 10.Rb6 Nb6–/+) 7...Bc6 8.ba5 Ra5 9.d4 e6 10.d5 ed5 11.ed5 Qc5? (better is 11...Ba8 12.Qe2 Be7 13.Nb5 Bd5+–) 12.dc6 dc6 13.Ne4 Qe7 14.Qe2 Nd7 (14...Nf6 15.Nd6 Kd7 16.Nf7 Qe2 17.Be2 Rg8+–) 15.Nd6 Kd8 16.Nb7 Kc7 17.Na5 Qc5 (17...Qe2 18.Be2 Bc5 19.c4+–) 18.Be3 Qc3 19.Bd2 Qa3 (19...Qf6 20.c4 b4 21.Nb3+–) 20.Nc6! Ne7 (20...Kc6 Decoy theme: c6 21.Qb5) 21.Ba5 Kc6 22.Qb5 Kd6 23.Rd1 Ke6 (23...Qd3 24.Rd3 Nd5 25.Qd5 Ke7 26.Bd8 Kd8 27.Qd7) 24.Bc4 Kf6 (24...Nd5 25.Qd5 Kf6 26.Qf7) 25.Qg5 1–0. marekt – coolerdude, ChessWorld.net, 2004.

3.a4 Ba6 4.ab5 Bb5 5.Na3 e6 6.Nb5 cb5 7.e4 Bb4 8.Bb5 Qb6 9.Ba4 Qa5? (better is 9...Nf6 10.e5 Ne4+/–) 10.c3+– Bd6 (10...Bc3 11.dc3 Qc3 12.Bd2 Qc4+–) 11.Bd7!! Nd7 (11...Kd7 12.Ra5) 12.Ra5 Nc5 (12...Bc7 13.Rb5+–) 13.d4 Nb7 (13...Nd7 14.Qa4 Ne7 15.Ra6+–) 14.Qa4 Ke7 15.Ra7 Ra7 16.Qa7 Kd7 17.Qb7 Bc7 18.Ne5 Kd6 (18...Kd8 19.Nf7 Kd7 20.Ne5 Kd8 21.Qa8 Ke7 22.Ba3 Kf6 23.Qf8 Kg5 24.Qg7 Kh5 25.Qg4 Kh6 26.Bc1#) 19.Ba3# 1–0. Trkn – guest6236, ICC, 2004.

3.a4 Qb6 4.ab5 cb5 5.e4 Bb7 6.d3 Nf6 7.Be3 Qc7 8.Na3 (8.Ba7 e5 9.Bb8 Bb4 10.Nfd2 Rb8–/+) 8...e6 (better is 8...a6!? 9.c4 e6=) 9.Nb5+/– Qc6 10.Na7 Qc3 (better is 10...Bb4!? 11.Nd2 Qc7+/–) 11.Bd2+– Qc7 12.c4 Nc6 13.Nb5 Qb8 14.Ra8 Qa8?? (14...Ba8 15.Qa4 Bb7+–) 15.Nc7 (15...Ke7 16.Na8 Ba8 17.Qa1+–) 1–0. miehnekort – jroxasb, Yahoo, 2005.

2.Nf3 e5

3.a3 e4 4.Nd4 d5 5.e3 Nf6 6.h3 (6.Bb2 Bd6=+) 6...a5 7.ba5 Bd7 (7...Ra5 8.Bb2=+) 8.c4 (8.Nb3 Bd6=+) 8...c5 9.Nb5 (9.Nb3 Be6 10.Qc2 Nc6=+) 9...Bb5 10.cb5 Qa5 (10...c4 11.Bb2=+) 11.Be2 (11.Bb2 Nbd7=+) 11...Nbd7 (11...c4 12.a4–/+) 12.0–0 (12.Bb2 c4 13.Nc3 Bd6=+) 12...c4 13.a4 Nc5 (13...Bd6 14.Bb2=+) 14.Nc3 (14.Bb2 Be7=+ (< 14...Na4 15.Bf6 gf6 16.Qc2+=)) 14...Bd6 15.Bb2 (15.Ba3 0–0=+) 15...0–0–/+ 16.f4 (16.f3 Nd3 17.Bd3 ed3–/+ (< 17...cd3 18.fe4 Ne4 19.Ne4 de4 20.Qg4+–)) 16...ef3 (16...Rfc8 17.Bg4 Rd8 18.Nb1–/+) 17.Rf3 (better is 17.Bf3 Be5 18.Ba3=+) 17...Ne6?? (better is 17...Nce4=+) 18.Rf6+/– gf6 19.Nd5 Be5 20.Be5 (20.Nf6 Bf6 21.Bf6 Rfc8+–) 20...fe5 21.Bc4 Qd8 22.Qg4 Qg5 23.Nf6 Kh8 24.Qf3 Rac8 25.d3 Qg6 26.Nd7+– Ng5 27.Qg3 e4 28.Nf8 Rf8 29.Rd1 Rg8 30.Qe5 f6 31.Qb2 Nh3 32.Kh2?? Qg3–+ 33.Kh1 Nf2 (34.Qf2 Qf2 35.Bg8 Qc2–+) 0–1. chessotka – juanpacio (1705), internet, 2006.

3.Bb2 Bb4 4.Be5 Nf6 5.c3 (5.Nc3 d6 6.Rb1 de5 7.Rb4 Qe7=+) 5...Ba5 6.Qb3 (6.e3 d5=+) 6...d5=+ 7.e3 Nbd7 8.Bd6 Bc7 (8...Ne4!? 9.Bb4 Bb4 10.Qb4 a5=+) 9.Ba3= Nb6 10.c4 (better 10.d4=) 10...Bd6?? (better 10...Nc4 11.Bc4 dc4 12.Qc4 Be6=+) 11.c5+– Bg4 (11...Bc7 12.cb6 ab6 13.d4+–) 12.Be2 (better 12.cd6!? Ne4+–) 12...Bf3 (12...Be7 13.cb6 Ba3 14.Na3 ab6 15.h3+–) 13.Bf3 (13.cd6 Be2 14.Ke2 Ne4–/+) 13...Nc4 (13...Be7 14.cb6 Ba3 15.Qa3 ab6 16.Qb4+–) 14.cd6 b5 (14...0–0 15.Qb7 Qb6 16.Qb6 ab6 17.Bb4+–) 15.d3 (better 15.d4 a5+–) 15...Ne5 (15...Na3 16.Qa3 0–0 17.0–0+–) 16.Nd2 a5 17.d4 (17.Qc3 Nf3 18.Nf3 0–0+–) 17...Nc4 (17...Nf3 18.Nf3 b4+–) 18.Nc4 bc4 (18...a4 19.Qc2 bc4 20.Rb1+–) 19.Qb7 0–0 (19...Rc8 20.0–0+–) 20.Qc6 Rc8 21.Qb7 (21.Qa4 Re8+–) 21...c3 (21...Rb8 22.Qc7+–) 22.Bd5 (22.Rc1 Rb8 23.Qa6 Qd7 24.Qa5 c2 25.Rc2 Rb1 26.Bd1 Qf5+–) 22...Nd5 (22...Rb8 23.Qc6 Nd5 24.Qd5+–) 23.Qd5 c2 24.0–0 (24.Kd2!? Qd7+–) 24...Rc3 25.Bb2 Rd3 (25...Rc8+–) 26.Rac1 Rd2 27.Bc3 (better 27.d7 Qa8 28.Qa8 Ra8+–) 27…Re2 1–0. Gery Kasparov – yodamo, ChessWorld.net, 2007. (=1.Nf3 c6 2.b4 e5)

3.Ne5 Bb4 4.Bb2 Nf6 5.Nd3 Ba5 6.e3 d6 7.Qf3 0–0 8.Bf6 Qf6 9.Qf6 gf6 10.Nf4 (10…d5 11.Kd1+=) +=. b4_player (2180) – albertouno (1640), GameColony.com, 2002.

3.Ne5 Bb4 4.c3 Be7 5.d4 Nf6 6.Qb3 d5 7.c4 dc4 8.Qc4 Be6 9.Qd3 Nbd7 10.Nd2 Ne5 11.de5 Ng4 12.Qc3 Ne5! 13.Rb1 (13.Qe5 Decoy to e5 13...Bf6) 13...Qb8 14.Ba3 Ba2 15.Rd1 Ba3 16.Qa3 Be6 17.e4 (17.f4 Ng4 18.Ne4 Qf4=+) 17...Qc7 18.f4 Ng4 19.h3 Nf6 20.e5 Nh5 21.Qf3 g6 22.Bc4 Bc4 23.Nc4 0–0 24.0–0 White prepares f5 24...Rfd8 25.Nd6 White prepares the advance f5 25...Qb6 (25...Nf6!=) 26.Kh1 Rab8 27.f5 Rf8 28.g3 (better is 28.f6!? Qc5 29.Rfe1+/–) 28...Qb2 29.Rfe1 Qa2 (29...Ng7 30.Re2 Qb4 31.Red2=) 30.Re4 (better is 30.f6!?+/–) 30...Qc2 31.Rf1 Rfd8 (31...b5 32.Rf2 Qc5 33.f6=+) 32.fg6 fg6 33.Rf2 Qb1 34.Kg2 Rf8 35.Qe3 (35.Nf7 Qc1 36.g4+–) 35...Rf2–/+ 36.Qf2 Rf8 37.Qe2 Kg7?? (37...b5!?–/+) 38.e6 Qb3–/+ 39.Qe1 Rf3 Will g3 fall? 40.e7 Rg3 41.Kf1 Qf3 42.Qf2 Qh1 43.Ke2 Rg2 44.e8Q Ng3 45.Ke3 Qc1 46.Kf3. pierre – fatontaraku, Yahoo, 2005.

2.f4 d5

(--> 1.b4 d5 2.f4 c6).

3.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.f4).

2.g4 d5

3.Nc3 Bg4 4.h3 Bh5 5.Nf3 Bf3 6.ef3 e6 7.h4? (better is 7.b5–+) 7...Bb4 8.a3 Bd6 (9.Rb1 b5–+; 8...Bc3 9.dc3 Qf6 10.Bd2–+) 0–1. guest92 – sicilian, ICC, 1995.

3.h3 h5 4.gh5 e5 5.a3 a5 6.Bb2 ab4 7.Be5 ba3 8.Na3 Nd7 9.Nb1 Ra1 10.Ba1 Ngf6 11.Nf3 Bd6 12.Rg1 Kf8 13.Bg2 (13.e3 Rh5 14.Nd4 Rh7=+) 13...Rh5=+ 14.e3 Nb6 Attacking the isolated pawn on h3 15.Rh1 Qe7 16.d3 c5 17.d4 c4 18.Ne5 Be6 (< 18...Be5 19.de5 Re5 20.Be5 Qe5 21.Qd2+=) 19.Nd2 Kg8 20.Ng4 Nfd7 21.e4 de4 The passed pawn on d4 will become decisive later 22.Ne3 Qh4 The pressure on the isolated pawn grows 23.Be4 Bf4 24.Qf3 Be3 25.Qe3 Nd5 26.Qa3 N7b6 (26...b5 27.Bf3 Rf5 28.Ne4–+) 27.Rg1= Qh3 28.Qd6 Qh4 29.Bf3 Rf5 30.Rg4 Qf6 31.Ne4 Qe7 32.Qe7 Ne7 33.d5 Bd5 (< 33...Rf3 34.de6 fe6 35.Rg7 Kf8 36.Ng5+=) 34.Rg7 Kf8 35.Bg2 Rf4 36.Nd6 Nf5 37.Nf5 Bg2 38.Rg5 Be4 39.Ne3 Nd7 40.Nc4 f6 41.Rh5 Bc2 42.Nd6 b6 43.Rb5 Ba4 44.Rb1 Bc6 45.Nc8 Exerts pressure on the isolated pawn 45...Be4 (45...b5 46.Na7 Bf3 47.Nb5 Re4 48.Kd2 Re2 49.Kd3 Nc5 50.Kd4 Ne6 51.Kc4 Rf2 52.Nd4=+) 46.Rd1 Bf5 47.Rd6 b5 (48.Nb6 Nc5 49.Rf6 Ke8=) =. wesolyPolak (1775) – ridha (1635), GameColony.com, 2002.

2.Nh3 d5

3.Ba3 e5 4.Ng1 Bd6 5.c3 Ne7 6.Qb3 Be6 7.Nf3 0–0 8.g3 Bg4 9.Qc2 Bf3 10.ef3 Nd7 11.Qb2 a5 12.Bg2 ab4 13.Bb4 c5 14.Ba3 Nb6 15.Qb3 c4 16.Qb2 Qd7 17.Bd6 Qd6 18.Qc1 Nd7 19.Ke2? (19.0–0–+) 19...Nc5 20.Qb2 Nd3 21.Qc2 Qc5 22.Rf1 Ng6 23.Bh1 Qb5 24.a3 Qd7 25.h4 Qa4 (25...Rfe8 26.g4 e4–+) 26.Qa4 Ra4 27.Ke3 Re8 28.Rg1 Nf8 29.Ke2 Nd7 30.Kf1 Nf6 31.Ra2 Rd8 32.Kg2 Rf8 33.Rc2 Re8 34.Rf1 Rc8 35.Ra2 Rca8 36.g4 Nf4 37.Kg3 R8a5 38.g5 Ne8 39.Rb2 Nd6 40.Rb6 Ra6 41.Rb4 R4a5 42.Rb2 Nd3 43.Rc2 Nb5 44.Kg4 Na3 45.Na3 Ra3 46.Kg3 f5 47.gf6 Rf6 48.Bg2 Nf4 49.Bh1 (49.Bh3–+) 49...Rg6 50.Kh2 Rh6 51.Re1 (51.Ra2 Ra2 52.Bg2–+) 51...Rh4 (51...Raa6 52.Re5 Rag6 53.h5 Nh5 54.Re8 Kf7 55.Rf8 Kf8 56.Bg2 Nf4 57.Kg1 Rg2 58.Kf1 Rh1) 52.Kg3–+ Rh5 53.Re5 Re5 (53...Rh1?! 54.Kf4 d4 55.Rb5–/+) 54.Kf4 Re2 55.Kg3 Ra1 56.Bg2 Rd1 57.Bh3 g6 (better is 57...Red2!? 58.Rd2 Rd2 59.Bf5–+) 58.Rb2 Rdd2 59.Rb7 h5 60.Rd7 g5 61.Rd8 Kf7 62.Rd7 Re7 63.Rd6 Re1 64.Rd7 Ke8 65.Rd6 Rg1 66.Bg2 (66.Kh2 Rc1 67.Re6 Kd8–+) 66...h4 67.Kh2 Rc1 68.Rg6 Rf2 69.Rg5 Rc3 70.Rg8 (70.Kh3 Rcc2 71.Rd5 Rg2 72.Kh4 Rc1 73.Re5 Kf7–+) 70...Kf7 71.Rg4 (71.Rd8 Rcc2 72.Kh3 Ke6 73.Re8 Kd7–+) 71...Rcc2 72.Rf4 Ke7 73.Kh3 Rg2 74.Rf5 Rh2 75.Kg4 Ke6 76.Rf8 Rcg2 77.Kh5 c3 78.Re8 Kf6 79.Re3 c2 80.Rc3 Rg5 81.Kh6 Rg1 (81...Rhg2 82.Rc6 Kf5 83.Rc7 Rg6 84.Kh7 c1Q 85.Rf7 Ke6 86.Rf6 Kf6 87.f4 Qc7 88.Kh8 Rh6) 82.Rc6 Kf5 83.Kh7 h3 84.Rc8 d4 (84...Rhg2 85.Rf8 Ke6 86.Re8 Kf7 87.Rb8 h2 88.Rb7 Ke6 89.Rb6 Kf5 90.Ra6 h1Q 91.Rh6 Rg7 92.Kh8 Qh6) 85.Rf8 Ke6 86.Re8 Kd7 87.Rf8 c1Q 88.f4 Qc2 (88...Qe1 89.Rf7 Ke8 90.Rf6 Qe7 91.Kh6 Qf6 92.Kh5 Qh8) 89.f5 Qe4 90.Rf7 Ke8 91.Rf6 (91.Rg7 Rg7 92.Kg7 Rg2 93.Kf6 Qe7) 91...Qe7 92.Kh6 Qf6 93.Kh5 Qg5# 0–1. Radon (2250) – Hossa (2265), ICS Rated blitz match, 1998.

3.Ba3 e5 4.Ng1 Bd6 5.c3 Ne7 6.Qb3 Be6 7.g3 d4 8.Qa4 a5 9.e3 0–0 10.cd4 b5 11.Qc2 ab4 12.Bb2 Ra2 13.de5 b3 14.Qc3 Bc7 15.Bg2 Nd7 16.Ra2 ba2 17.Na3 Ne5 18.Ke2 (18.Bf1 Ba5 19.Qc1 Qd5 20.Be5 Qh1–+) 18...Bd6 19.Nc2 Bc4 20.Kd1 Nd5 21.Bd5 Bd5 22.f3 c5 23.e4 (23.Ne1 b4 24.Qc1 Qa5–+) 23...b4 24.Qe3 Nc4 25.Qb3 Qg5 26.Bc1 Be6 27.Qd3 (27.d4 Ne3! 28.Qe3 Qe3 29.Be3–+) 27...Ra8 28.f4 Qg4 29.Ke1 a1R 30.Na1 Ra1 31.Ne2 Bc7 32.Kf2 Na3 (32...Nb2! 33.Qf3–+) 33.Qe3 Bb6 34.f5 Nc2 35.Qf3 c4 36.Kg2 Qf3 37.Kf3 Bd7 38.Kg2 (38.Nf4 b3 39.Kg2 Bd4–+) 38...Ra2 (38...Bc6 39.Kf3 b3 40.Nc3–+) 39.Kh3 (39.g4 b3–+) 39...b3 (better is 39...Bc6 40.Rf1 Be4 41.Nc3 bc3 42.dc3 Bg2 43.Kg2 Ne3 44.Kf3 Nf1 45.Bf4–+) 40.Nf4 b2 41.Bb2 Rb2 42.Rd1 f6 43.Nd5 Bd4 44.Ne7 Kf7 45.Nd5 Be5 46.d3 (46.Kg2 Nd4–+) 46...c3 47.Rh1 Na3 48.Ne3 Bb5 49.d4 (49.Ra1 c2 50.Nc2 Nc2 51.Ra7 Ke8 52.Ra8 Kd7 53.Ra7 Kc6–+) 49...Bd4 50.Rc1 Be3 51.Rc3 Nc4 (51...Bf1 52.Kg4 h5 53.Kf3 Bg5 54.Rc7 Kg8 55.Rc8 Kh7 56.Rh8 Kh8 57.g4 Bg2 58.Kg3 h4) 52.g4 Bf4 53.Kh4 (53.Rg3 Ne5 54.Rg2 Rb3 55.Rg3 Bf1 56.Kh4 Bg5 57.Kh5 g6 58.fg6 hg6) 53...Rh2 (53...g5 54.fg6 hg6 55.Rc2 Rc2 56.g5 fg5 57.Kg4 Ne5 58.Kh3 Rh2) 54.Rh3 Rh3 55.Kh3 Ne3 (56.Kh4 Bf1 57.e5 Ng2 58.Kh3 Ne1 59.Kh4 Nf3 60.Kh5 g6 61.fg6 hg6#) 0–1. Radon (2165) – Hossa (2185), ICS Rated blitz match, 1998.

2.a3 a5

3.ba5 Qa5 4.Bb2 e5 5.e3 Qc7 (5...Nf6 6.Nf3 d6 7.Nc3+=) 6.c4 (6.Nf3 e4 7.Nd4 Nf6=) 6...Nf6 7.d3 (7.Nf3!? d6 8.Qc2=) 7...d5 8.Nd2 Be6 9.Ngf3 Nbd7 10.Be2 dc4 11.dc4 (11.Nc4 Bc4 12.dc4 Bd6+=) 11...h6–/+ 12.0–0 Bd6 13.e4 0–0 14.Qc2 Nc5 15.Rfe1 (15.a4 Bg4–/+) 15...Ra7 (15...Na4 16.Bc1–/+) 16.Bd3 (16.Rad1 Ncd7–/+) 16...Rfa8 17.Nb3 Nb3 (17...Nd3 18.Qd3 Nd7 19.c5–/+) 18.Qb3 Nd7 19.Qc3 (19.Red1 Ra4–/+) 19...f6 20.Reb1 (20.Red1 Bc5–/+) 20...Nc5–+ 21.Bc2 Qe7 (21...Na4 22.Ba4 Ra4 23.Nd2–+) 22.Bc1 (22.Nh4 Na4 23.Ba4 Ra4–/+) 22...Nd7 (22...Na4 23.Qe1–/+) 23.a4 Nc5 24.Be3 Na4 25.Ra4 Ra4 26.Ba4 Ra4 27.c5 Bb8 28.Nd2 Ba7 (28...Kh7 29.h3–/+) 29.h3 (29.Qc2 Ra6–/+) 29...Qc7 (29...Kh7 30.Qc2 Ra5 31.Qc3–/+) 30.Qb2 Ra5 31.Qb7 Qb7 32.Rb7 Bc5 33.Rc7? (33.Nb3 Bb3 34.Rb3–/+) 33...Ra1–+ 34.Kh2 Be3 35.fe3 Rc1 36.Kg3 Rc2 37.Nf3 g5 (37...Bf7 38.Nh4 g6 39.Kf3–+) 38.Re7 (38.Ne1 Rc3 39.Kf3–+) 38...Bf7 39.Nh2 (39.Rd7 c5–+) 39...h5 40.Nf3 Kf8 41.Rc7 (41.Ra7 Bg6 42.Ra4 Re2–+) 41...Bg6 42.Ne1 (42.Rd7 h4 43.Kh2 Be4–+) 42...Rc4 (better is 42...Re2!? 43.Rc6 h4 44.Kf3 Bh5 45.g4 hg3 46.Kg3 Re1 47.Rf6 Ke7 48.Rf5 Re3 49.Kf2 Re2 50.Kg3–+) 43.Nd3 Be4 44.Nf2 Bg6 45.e4 (45.Kf3 f5 46.g4 fg4 47.hg4 hg4 48.Kg3 Bf5–+) 45...Be4 46.Ne4 Re4 47.Rc6 Kg7 48.Rc7 (48.Kf3 Ra4–+) 48...Kg6 49.Kf3 Ra4 50.Rc6 (50.Rc3–+) 50...g4 51.hg4 hg4 (51...Rg4?! 52.Rc8–+) 52.Kg3 (52.Kf2 Ra2 53.Kf1 Ra3–+) 52...Kg5 53.Rc8 (53.Kh2 f5–+) 53...Ra3 54.Kh2 Kf4 (54...Kf4 55.Rc1 e4–+) 0–1. Pozanco Romasanta,Marc (1780) – Ortega Serra,Marc (2170), 4th Open De Llinars Group A, 2010.

3.ba5 d5 4.Nf3 Nf6 5.Bb2 (5.d3 Qa5 6.Bd2 Qc7=+) 5...Ra5 (5...Nbd7 6.Bc3=+) 6.e3 Bg4 (6...Nbd7 7.Be2=+) 7.h3= Bh5 8.d3 (8.Bc3 Ra8=+) 8...Nbd7=+ 9.Nbd2 e6 10.g4 (10.Nb3 Ra4=+) 10...Bg6 11.Bg2 (11.g5 Nh5=+) 11...Qa8 (11...Bd6 12.Bc3 Ra4 13.Nh4–/+) 12.Qc1 (12.0–0 Be7=+) 12...h6 (12...Bd6 13.0–0=+) 13.Nd4 (13.0–0 Be7=+) 13...c5 (13...Bd6 14.0–0–/+) 14.Ne2=+ Be7 (14...Bd6 15.Nb3 Ra6 16.Nf4–/+) 15.f4 (15.Nf4 Bh7=+) 15...0–0 (15...Ra6 16.0–0=+) 16.Bf3 (16.0–0 Ra6=+) 16...c4 (16...Rb5 17.0–0–/+) 17.dc4 Rc8 (17...dc4 18.0–0–/+) 18.h4 White prepares g5 (18.0–0 dc4 19.Bc3 Ra6–/+ (worse 19...Ba3 20.Qb1 Ra7 21.Nd4=)) 18...dc4 19.g5 hg5 20.hg5 Nd5 21.Bd5 (21.Nb1 Qa7 22.e4 c3 23.Nbc3 Ne3–/+) 21...Rd5 22.Bc3 (22.Nc3 Rd6–/+) 22...Nc5 23.Ng3 (23.a4 Na4 24.Kf2 b5–/+) 23...b5 (23...Qa4 24.Ra2–+) 24.Kf2 Rcd8 25.Nf3 (25.a4 ba4 26.Nc4–/+) 25...Rf5?? (better 25...Be4 26.Ne5 Bh1 27.Qh1 Rd2 28.Bd2 Rd2 29.Ke1 Qh1 30.Nh1 Rg2–+) 26.Rh2 f6 (26...Rfd5 27.Rh1 Be4 28.Ne5 Bh1 29.Qh1 Rd2 30.Bd2 Rd2 31.Ke1 Qh1 32.Nh1–+) 27.gf6 (27.Nh4 Kf7 28.Ng6 Kg6 29.Nf5 Ne4 30.Kg1 ef5+=) 27...Bf6= (27...Rf6? 28.Qh1 Kf7 29.Ne5 Ke8 30.Rh8 Bf8 31.Rf8 (31.Ng6?! Rg6 32.Bb4 Qh1 33.Rah1 Kf7+–) 31...Rf8 32.Ng6 Qh1 33.Rh1+– (33.Nh1?! Ne4 34.Kf3 Nc3 35.Nf8 Kf8=)) 28.Bf6 Rf6 29.Qh1 Kf7? (better 29...Kf8 30.Rd1 Rd1 31.Qd1 Qd5= (31...Qa3?? 32.Rh8 Ke7 33.Qd8 Kf7 34.Ne5)) 30.Ne5+– Ke7 31.Nc6 Kf7 32.Nd8 Qd8 33.Rd1 Qc7?? (better 33...Qb6 34.Kf1 Nd3 35.cd3 Bd3 36.Rd3 cd3+–) 34.Qa8 Bc2 (34...Ke7 35.Rh8 Qb6+–) 35.Rd8 (35.Rh8 Ne4 36.Ne4 Rf4 37.ef4 Qf4 38.Ke2 Qe4 39.Qe4 Be4+–) 35...Bg6?? (35...Ke7 36.Rhh8 Qb7 37.Rde8 Kd6 38.Qd8 Kc6+–) 36.Rhh8 c3 (36...Bd3+–) 37.Rc8 (37.Rd7 Qd7 38.Qf8) 37...Qb6 38.Rc5! Qc5 (38...Qc5 39.Qe8) 39.Qe8 1–0. Jaracz,Pawel (2465) – Moranda,Wojciech (2590), Adolf Anderssen Mem Final, 2017.

3.ba5 d6 4.d3 c5 5.Nf3 e5 6.g3 Nf6 7.Bd2 Nc6 8.e3 e4 9.Ng5 ed3 10.cd3 Na5 11.Nc3 Be7 12.Be2 0–0 13.0–0 Nd7 14.Nf3 Nf6 15.e4 Bh3 16.Re1 Nc6 17.Ng5 Bd7 18.Be3 Ne8 19.Nf3 Bf6 20.Qc1 Qa5 21.Bd2 Qa6 22.d4 c4 23.d5 Na5 24.Bd1 Bg4 25.Re3 Nc7 26.Rb1 Rfe8 27.Ba4 Re7 28.Nb5 Nd5? 29.ed5+– Re3 30.Be3 Rc8? 31.Na7 c3 32.Bb5 Qa7 33.Ba7 Bf3 34.Bd3 Ra8 35.Qf4 Be2 36.Be2 Ra7 37.Qd6 Ra8 38.Rb5 c2 39.Qc5 b6 40.Qc2 Rd8 41.Rb6 h6 42.Rb5 Ra8 43.Qc7 Re8 44.Ra5 Rf8 45.d6 Re8 46.Bc4 Rf8 47.Ra8! Ra8 48.Qf7 Kh7 49.Bd3 Kh8 50.Qg6 Kg8 51.Qh7 Kf7 52.Bc4 Ke8 53.Qe4 Kd7 54.Qe6 Kc6 55.Qd5 Kd7 56.Bb5 Kc8 57.Qa8# 1–0. GLChess207e – Mint161, computer chess game, 2000.

3.ba5 g6 4.Bb2 Nf6 5.Bf6 (5.e4 d6=) 5...ef6 6.Nf3 d5 7.e3 Bg7 (7...Qa5 8.Be2=+) 8.Ra2 (8.d4 Qa5 9.Nbd2 b5=) 8...Qa5=+ 9.Rb2 (9.Be2 b5=+) 9...Nd7 (9...b5 10.Be2=+) 10.Be2= f5 11.Rb4 Bf8 (11...b5 12.0–0=+) 12.Rb3 (12.Rb2 Bd6=+) 12...Nc5 13.Rb4 (13.Rb2 Bg7 14.c3 b5=+) 13...Ne4 14.Rb3 Nd6 (14...Bd6!?=+) 15.0–0= Nc4 Increasing the pressure on the isolated pawn on a3 16.Qc1 (16.Bc4 dc4 17.Rb2 Bg7=) 16...b5 (16...Bd6 17.Bc4 dc4 18.Rc3=) 17.d3 Na3 18.Qb2 Rg8 19.Qe5 Be6 20.Na3 Ba3 21.Ra1 b4 22.Nd4 (22.d4 Qb6+=) 22...Kd7 23.g4 (better is 23.c3 Qb6 24.Nc2+=) 23...c5 24.Ne6 (24.c3 Qc7 (< 24...fg4 25.Ne6 fe6 26.Bg4+=) 25.Qc7 Kc7 26.Nb5 Kc6 27.Na3 Ra3 (27...ba3?! 28.g5=) 28.Rba3 ba3 29.Ra3 fg4 30.Ra6 Kb5–/+) 24...fe6 25.Raa3 (better is 25.d4!?–/+) 25...ba3–+ 26.Rb7 Kc6 (26...Kc8!? 27.Re7 Ra6 28.Re6 a2 29.Ra6 Qa6–+) 27.Re7–/+ Do you see the mate threat? 27...Rgb8?? (better is 27...Qe1 28.Bf1 Rgd8=+ (28...fg4?? 29.Qe6 Kb5 30.Rb7 Ka5 31.Qb6 Ka4 32.Qb5)) 28.Qe6?? (28.c4 Rd8 29.Qe6 Rd6 30.cd5 Kb5 31.Qd6+–) 28...Kb5+= 29.Qd5 Qc3 30.Rb7 Ka5 31.d4 Rb7?? 32.Qb7+– Qb2 33.Qa8 Kb4 34.Qa6 a2 35.Qb5 Ka3 36.Qa5# 1–0. Wrobel,Dieter – Kalka,Arkadius Georg, Bochum Post op, 1992.

3.b5 Qb6 4.bc6 Nc6 5.Nc3 Nf6 6.Rb1 Qd8 7.d4 d5 8.e3 e5 9.de5 Ne5 10.Nge2 (10.Nf3 Nc6+=) 10...Bc5 (10...Nc4 11.Nf4 Na3 12.Ba3 (12.Ncd5?? Nb1 13.Bb2 Bb4 14.c3 Nd5 15.Nd5 Nc3 16.Bc3 Bc3 17.Nc3 Qd1 18.Kd1 Bd7–+) 12...Ba3 13.Bb5 Kf8 14.Ncd5=) 11.Nf4+= 0–0 12.Ncd5 Nd5 13.Qd5 Qe7 14.Rb5 Rd8?? (better is 14...Nd7 15.Bd3 Ba3 16.Bh7 Kh8+=) 15.Qc5+– (< 15.Rc5 Rd5 16.Rd5 Bd7=) 15...Qc5 16.Rc5 Nd7 17.Rd5 b6 18.Bb5 Bb7 (18...Ra7 19.Bb2 Rc7 20.Bd4+–) 19.Rd7 (19...Rd7 20.Bd7+–) 1–0. Taulien,Hans_Juergen – Tiedemann,Joern, remoteschach.de, 2003.

3.b5 e5 (--> 1.b4 e5 2.a3 a5 3.b5 c6).

3.b5 Nf6 4.e3 e5 5.Bb2 d6 6.c4 (6.d4 e4=) 6...Be7 7.Nc3 (7.d4 e4=) 7...0–0 8.d4 ed4 (8...Bf5 9.Nge2=+) 9.Qd4 Nbd7 10.Rd1 Nc5 11.Nf3 Bf5 12.Qf4 Bc2 13.Rc1 (13.Rd2 Bg6 14.Nd4 Nfe4 15.Ne4 Be4+=) 13...Bg6 14.Rd1 Qd7 (14...Re8 15.Be2=) 15.Ne4?? Now all is on d6 (better is 15.Ne5 Qc7 16.Ng6 fg6 17.Qg3+=) 0–1. Baer,Werner – Bonetti,Shane, TT–11 ETC, 2003.

3.c3 ab4 4.cb4 e6 5.Bb2 Nf6 6.e3 d5 7.Nf3 Bd6 8.Be2 0–0 9.0–0 Nbd7 10.d3 e5 11.Nbd2 Re8 12.Qc2 Nf8 13.h3 (13.d4 e4 14.Ne5 Ng6+=) 13...Bd7 (13...Ng6 14.Bc3+=) 14.e4 (14.Nb3 Ng6+=) 14...d4 (14...Ng6!?–/+) 15.Nc4+= Bc7 16.Bc1 (16.a4 Ng6+=) 16...h6 (16...b5!? 17.Ncd2 Ne6+=) 17.Nh2 (17.Bd2!?=) 17…Qc8 ½–½. Loskutova,Anastasia (1800) – Astakhov,Alexander (1745), Anna RUS, Gagarin Mem, 2014.

3.c3 d5 4.d4 Nf6 5.f3 (5.Bf4 Bf5=+) 5...e6 6.e3 (6.ba5!? Qa5 7.Bf4=+) 6...ab4–/+ 7.cb4 (7.Bd3 c5–/+) 7...Bb4!–+ 8.Nd2 Qb6 (better is 8...0–0–+) 9.Qb3?? (better is 9.Rb1 Bd2 10.Bd2–/+) 9...Bd2–+ 10.Bd2 Qb3 11.Ne2 Ra3 12.Ra3 Qa3 13.Nc3 Qa1 14.Ke2 0–0 15.g4 h6 16.Bg2 Qa6 17.Kf2 b5 (17...Re8 18.Rb1–+) 18.Rb1 Nbd7 19.h4 Nb6 20.Kg3 Nc4 21.Bc1 Qa5 22.Rb3 Qa1 23.Ne2 Qa2 0–1. dhub noire – SIRMO, ChessWorld.net, 2006.

3.c3 Nf6 4.Nf3 +=.

3.Bb2

3.Bb2 (--> 1.b4 c6 2.Bb2 a5 3.a3).

3.Bb2 ab4 4.ab4 Ra1 5.Ba1 Qb6 6.c3 d5 (--> 1.b4 c6 2.Bb2 a5 3.a3 ab4 4.ab4 Ra1 5.Ba1 Qb6 6.c3 d5).

3.Bb2 Qb6 4.c3 (--> 1.b4 c6 2.Bb2 a5 3.c3 Qb6 4.a3).

3.b5 cb5

4.e3 b4 5.ab4 d5 6.Bb2 Nf6 7.Nf3 Nc6 8.b5 Na7 9.Bd3 e6 10.Ne5 Bd6 11.f4 0–0 12.Nc3 b6 13.0–0 Bb7 14.Na4 Nc8 15.Rf3 Bc5 (15...Ne4 16.Be4 de4 17.Rg3+=) 16.Rh3+= d4 17.Bh7 Nh7 18.Qh5 Be4 19.d3 Bf5 20.g4 Bg6 (20...Qf6 21.gf5 Qf5 22.Qf5 ef5 23.Nc5 bc5 24.ed4 cd4 25.Bd4+–) 21.Ng6 fg6 22.Qh7 Kf7 23.f5 (23.Nc5 bc5 24.ed4 Qf6+–) 23...Qg5 (23...gf5 24.gf5 Qf6 25.fe6 Ke7 26.Rg3+– (< 26.Nc5 bc5 27.Rg3 Kd8+–)) 24.fe6 (24.Bd4?! Bd4 25.Qg6 Qg6 26.fg6 Kg6 27.ed4 Rf4+/–) 24...Ke6 25.Qg7 (better is 25.Nc5 bc5 26.ed4+–) 25...Nd6?? (25...Rf7 26.Qg8 Ke7 27.Nc5 bc5 28.ed4 Qg4 29.Rg3 Qe2 30.dc5 Qf2 31.Kh1 Rf5+–) 26.ed4 Rg8 (26...Rf7 27.Re1 Kd7+–) 27.Re1 (27...Ne4 28.Re4 Kd6 29.dc5 Qc5 30.Rd4 Qd4 31.Qd4 Kc7 32.Rh7 Rg7 33.Qg7 Kd6 34.Qe5#; 27.dc5 Rg7 28.Re1 Kf7 29.cd6 Kg8 30.Bg7 Kg7 31.Re7 Kg8=) 1–0. Taulien,Hans_Juergen – Steingraeber,Barbara, RSX9E – A00 – Sokolsky–1, 2002.

4.e3 Qb6 5.Nc3 b4 6.ab4 (--> 1.b4 c6 2.e3 Qb6 3.a3 a5 4.b5 cb5 5.Nc3 b4 6.ab4).

4.e4 Qb6 5.Nc3 e6 (5...b4 6.ab4 Qb4 7.Ra4=) 6.Nb5 (6...d6 7.Rb1+=) +=. Taulien,Hans_Juergen – Boehnke,Hartmut, remoteschach.de, 2003.

4.e4 Nf6 5.Nc3 e5 6.d4 b4 7.de5 bc3 8.ef6 Qf6 9.Be3 Bd6 10.Bd4 Be5 11.Nf3 d6 12.Ne5 de5 13.Bc3 0–0 14.Bd3 Be6 15.0–0 Nd7 16.Qd2 b6 17.f4 Qe7 18.Bb2 Rac8 19.Qe3 ef4 20.Rf4 f6 21.Bd4 Qd6 22.Rb1 Qa3 (22...Rfd8 23.Bb6 Nb6 24.Rb6+=) 23.e5+= f5 (23...fe5? 24.Bh7 Kh8 25.Qa3 Rf4 26.Be3 Kh7 27.Bf4 ef4 28.Qd6+–; 23...Ne5?? 24.Bh7! Kh7 25.Qa3+–) 24.g4 Nc5 25.Ra1 Qb4 26.c3 (worse is 26.gf5 Nd3 27.cd3 Rf5 28.Rf5 Bf5+=; worse is 26.Bf5 Rfe8+=) 26...Qb2 27.Rb1 Qa2 28.gf5 Nd3 29.Qd3 b5 30.Re1 Qc4 (better is 30...Kh8!?+=) 31.Qe4+/– Bd5 32.Qe3 (32.Qe3 Rce8 33.e6+–) 1–0. Baroin,Bernard (2015) – Stefanov,Plamen (2185), IECG, 2004.

3.b5 d5

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

4.Bb2 e6 5.e3 Nf6 6.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 a5 6.b5).

4.Bb2 Nf6 5.e3 Qd6 6.f4 g6 7.Nf3 Bg7 8.Be2 0–0 9.0–0 Bg4 10.Be5 Qd8 11.Nc3 Nbd7 12.Ng5 Be2 13.Qe2 c5 14.Nf3 Nb6 15.d3 Rc8 16.Rab1 e6 17.Qe1 Ra8 18.Ne2 Qe7 19.Qh4 Qd8 20.Qg3 Rc8 21.Ra1 Nbd7 22.a4 (22.Rad1 c4+=) 22...Ra8 (22...Ne5 23.fe5 Nd7 24.Rac1=) 23.Bc3 Qb6 24.Qh4 Qd8 25.Rfb1 Nb6 26.Qh3 Nbd7 27.Ra2 Nb6 28.Be5 Rc8 29.Rd1 Ra8 30.g4 Nbd7 31.g5 Ne5 32.fe5 Nd7 33.d4 Rc8 34.Qh4 Re8 35.Qf4 Nb6 36.Nd2 Qe7 37.Rf1 Rc7 38.Rf3 Nd7 (38...Rec8 39.c3=) 39.c3+= Rec8 40.Rh3 Nf8 41.c4 (41.Nb3 c4 42.Nd2 Nd7+=) 41...Rd8 (41...cd4 42.ed4 dc4 43.Ne4=) 42.Rc2= Qd7 43.Rc1 Qe7 44.Rf3 Rdc8 45.Nc3 Rd7 46.b6 Rc6 47.Nb5 Rb6 48.Nb3 cd4 49.ed4 dc4 50.Rc4 Ra6 51.Rc8 Rc6 52.Rc6 bc6 53.Nd6 Rc7 54.Nc5 Qd8 55.Nce4 (55.Nf7!? Qb8+–) 55...Qb8 56.Nf6 Kh8 57.Nfe8 Qb1 58.Rf1 (58...Qb6 59.Ng7+–) 1–0. Taulien,Hans_Juergen – Rehder,Frank, RSXL2 –2003.

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

4.Bb2 Nf6 5.e3 e6 6.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 a5 6.b5).

4.e3 e5 5.Bb2 Bd6 6.c4 Nf6 7.bc6 (7.d4 e4=) 7...bc6 8.Nf3 Nbd7 9.Nc3 0–0 10.cd5 cd5 11.Nb5 Bb8 12.d4 e4 13.Ne5 (13.Nd2 Ba6=) 13...Ne5–/+ 14.de5 Ng4 15.Be2 Ne5 16.Bd4 Qg5 17.Kf1 Bg4 18.h4 Be2 19.Qe2 Qf5 20.h5 h6 21.Rd1 Rc8 22.Ba1 Ng4 (22...Nd3!? 23.Kg1–+) 23.Kg1–/+ Qg5 24.Rh3 Ra6 25.Nd4 (25.Bc3!?–/+) 25...Rf6–+ 26.Rf1?? (better 26.f4 ef3 27.Nf3 Qe3 28.Qe3 Ne3 29.Re1–+) 26...Nf2! 27.Qf2 (27.Rf2 Rc1 Decoy) 27...Rf2 28.Kf2 Be5 29.Kg1 Qg4 30.Bb2 a4 31.Ba1 f6 32.Kh1 (32.Re1 Bd4 33.Bd4 Rc2–+) 32...Bd4 33.Bd4 Rc2 34.Rh2 Qe2 (34...Qe2 35.Rg1 Qd3–+) 0–1. Basman,M (2310) – Lenaerts,L (2360), Haarlem Masters (2), 2018.

4.e3 e5 5.Bb2 Bd6 6.Nf3 Bg4 (6...Nd7 7.Be2=+) 7.h3= Bf3 8.Qf3 Nf6 (8...Qf6 9.Be2=) 9.Qg3 Nbd7 (9...Nh5 10.Qg4 g6 11.Qa4=) 10.bc6+= bc6 11.Qg7 Rg8 12.Qh6 Rb8 (12...Qb6 13.Ra2+=) 13.Ra2 d4 14.g4 Rb6 (15.Kd1 Qb8=). Blankenberg,Bruno – Rosner,Dirk, DESC, 2000.

4.e3 e5 5.d4 Bd6 6.Bb2 e4 7.c4 Nf6 8.Nc3 0–0 9.Qb3 Be6 10.cd5 cd5 11.Nge2 Nbd7 12.Na4 Nb6 (better is 12...Qe7!?–/+) 13.Nb6+= Qb6 14.Nc3 Qd8 15.Be2 b6 16.Rc1 Rc8 17.h3 Re8 18.Kd2 Bf8 19.Na4 Qd6 20.Rc6 Rc6 21.bc6 Rb8 (worse is 21...Qc6 22.Bb5 Qa8 23.Nb6+/–) 22.Bb5 Ne8 23.Nc3 Nc7 24.a4 f5 25.g3 Bf7 26.Rc1 Be8 (26...Nb5? 27.Nb5 (worse is 27.Qb5 Rc8+=; 27.ab5?! Be7=) 27...Qb4 28.Qb4 Bb4 29.Bc3+–) 27.Nb1 Qb4 28.Qb4 Bb4 29.Bc3 Be7 30.Bb2 Rd8 31.Ke2 Kf8 32.f3 Rd6 33.Kf2 Rg6 (worse is 33...Nb5 34.ab5 Rd8 35.Nc3+/–) 34.Ba3 Ba3 35.Na3 Ke7 36.g4 ef3 37.Kf3 fg4 38.hg4 Rf6 39.Kg3 h6 40.Nb1 Re6 41.Rc3 Bg6 42.Nd2 Be4 (42...Nb5!? 43.ab5 Kd8+=) 43.Be2 Kd6 44.Bf3 Bg6 45.Be2 Be8 46.Bb5 Re7 47.Nf3 Ne6 (47...Nb5!? 48.ab5 a4+=) 48.Ne5+= Rc7 49.Rb3 Re7 50.Rb2 Kc7 51.Kf3 Nd8 52.Rc2 Re6 53.e4 de4 54.Kf4 (54.Ke3 Nf7 55.Bc4 Re5 56.Bf7=) 54...g5 (better is 54...Nf7+=) 55.Kf5+/– Rd6 56.Ke4 Ne6 57.Rd2 Nf4 58.d5 Bg6 59.Ng6 Ng6 60.Be2 Rf6+= 61.Bf3 Kd6 62.Rc2 Rf7 63.Bg2 Nf4= 64.Bh1 Nd5–/+ 65.Rd2 Rf4–+ 66.Kd3 Kc6 67.Kc2–/+ Rc4 68.Kb3 Rc5?? 69.Re2?? Kd6 70.Rd2 Ke5–+ 71.Re2 Kf4 72.Re4 Kg3 73.Re5?? Nb4 74.Rc5?? bc5 75.Kc4 Kg4 76.Kc5 Na2 77.Kb5 Nc3 78.Ka5 Kg3 79.Kb4 Na4 80.Ka4 h5 81.Kb3 g4 82.Kc3 Kf2 83.Kd3 g3 84.Ke4 g2 85.Bg2 Kg2 86.Kf4 h4 0–1. Schott,Detlef (1865) – Zahn,Richard (1905), Niederrhein–ch, 2007. (=1.b4 c6 2.a3 a5 3.b5 d5)

4.Nf3 Bf5 5.Bb2 e6 6.e3 Nf6 7.Be2 Bd6 (7...Bg4 8.Nc3=) 8.Nh4 Bg6 (8...Be4 9.Nc3=) 9.Nc3 Nbd7 (9...0–0 10.Ng6 fg6 11.f4=) 10.f4 d4 11.ed4 (11.Ng6 hg6 12.Na4 Ne4=+) 11...Bf4 12.g3 (12.0–0 Qc7 13.g3 Bd6=) 12...Bg5 (12...Bd6 13.Rb1=) 13.Ng6 hg6 14.Bf3 (14.h4=) 14...0–0 (14...Nd5 15.Rb1=) 15.Rb1 (15.bc6 bc6 16.h4 Bh6 17.Bc6 Rc8+/–) 15...Nb6 (15...Nd5 16.Qe2+=) 16.Qe2 (16.h4 Bh6 17.g4 Bf4 18.bc6 Bg3 19.Ke2 bc6+=) 16...Rc8 (16...Nbd5 17.0–0+=) 17.bc6 bc6 18.Qd3 (18.h4 Bh6+=) 18...c5 (18...Qd6 19.0–0+=) 19.dc5 (19.h4 Bh6 20.dc5 Qd3 21.cd3 Rc5+/–) 19...Rc5 (19...Qd3 20.cd3 Rc5 21.h4+=) 20.h4 Bh6 21.Qd8 Rd8 22.d3 Nbd5 23.Nd5 Nd5 24.c4 (24.Rh2!?=) 24...Nc3!?=+ 25.Bc3 Rd3 A double attack 26.Bb4 (26.Bd4 Rc4 (26...Rf3?? 27.Bc5 Rc3 28.Ke2+–; 26...Rd4?! 27.Rb8 Kh7 28.Be2–+) 27.Be2 Rcd4 28.Bd3 Rd3–/+) 26...ab4–/+ 27.ab4 Rc4 28.Be2 Re4 (28...Re3 29.Kf2 Rc2 30.Rhe1=+) 29.b5 Rg3–/+ (30.b6 Rg2–/+) 0–1. Wrede,Christian – Bonetti,Shane, TT–11 ETC, 2003.

4.Nf3 Bf5 5.Bb2 Nf6 6.e3=.

4.Nf3 Bf5 5.e3 Nf6 6.Bb2 (6.Be2 e6=) 6...e6 7.c4 (7.Be2 Bd6=) 7...Be7 (7...Bd6 8.Nd4 Be4 9.d3=) 8.Nc3 (8.cd5 ed5 9.Be2 0–0=) 8...0–0 9.Rc1 Ne4 (9...Bd6 10.d4=) 10.cd5 cd5 11.Nd4 (11.Be2 Nc3 12.Rc3 Nd7=) 11...Bg6 12.Nde2 (12.Ne4 Be4 13.Qg4 Bf6=) 12...Nc3 13.Nc3 Nd7 14.Be2 Nb6 15.Na4 Nc4 16.Bc4 dc4 17.Rc4 (17.Qg4 Qd5=+) 17...Qd5 18.Qg4 Qb5 19.Rc7 Rfe8 20.Qd4 f6 21.Nb6 (21.f3 Rac8 22.Qd7 Qd7 23.Rd7 b5–/+) 21...Rad8–/+ 22.Nd7 e5 23.Qb6 Qd3 24.Bc1 (24.Qb7?? Bf5–+ (24...Ba3?! 25.Ba3 Be4 26.Qa7=+)) 24...Kh8 (< 24...Ba3 25.Ba3 Qa3 26.0–0–/+) 25.Nc5 (25.Qb7?? Be4 (25...Ba3?! 26.Ba3 Bf5 27.Qc6–/+) 26.Qb6 Rd7–+) 25...Qd5 26.Qb7 (26.e4 Bc5 27.Qc5 (27.ed5?? Bb6 28.Rb7 Bc5–+) 27...Qe4 28.Kf1–+) 26...Bc5 27.Qd5 Rd5 28.f3 Rb8 (28...Bd6 29.Rc3–+) 29.e4 Bd6 (29...Bb6 30.Re7 Rd3 31.Ke2–+) 30.Rc3 (30.Ra7 Rdb5 31.Ke2 Rc8–+) 30...Rc5 31.Kd1 Be8 32.Re1 Ba4 33.Ke2 Rb1 (34.Kf2 Rc3 35.dc3 Bc5 36.Ke2 Bb5 37.Kd2 Ra1–+) 0–1. Baer,Werner – Bonetti,Shane, TT–10 ETC, 2003.

4.Nf3 Nf6 5.Bb2=.

4.Nf3 Nf6 5.e3=.

2.a3 Nf6

3.Bb2 g6 4.c4 (4.Nf3 Bg7=) 4...Bg7 5.Nf3 d6 (5...0–0 6.e3=) 6.g3 (6.d4 0–0=) 6...0–0 (6...e5 7.Bg2=) 7.Bg2 Be6 8.d3 d5 9.c5 (9.Nbd2 dc4 10.dc4 Qc8=) 9...a5 (9...Bg4 10.0–0=) 10.Nbd2 (10.0–0 Bg4=) 10...Na6 11.Bc3 (11.Qb3 Bg4=) 11...Nd7 (11...b6 12.Nb3=) 12.Bg7+= Kg7 13.Qc2 f6 14.Qb2 ab4 15.ab4 Nc7 (15...Bg4 16.Nd4 e5 17.h3+=) 16.Nd4 (16.Ra8 Na8 17.h3 Bf7+=) 16...Bf7 (16...Ra1 17.Qa1 Bf7 18.0–0=) 17.0–0 e5 18.N4f3 (18.Ra8 Na8 19.N4f3 b6+=) 18...Nb5 (18...Qe7 19.Nb3=) 19.Ra8+= Qa8 20.Ra1 Qd8 (20...Qe8 21.e3+=) 21.e3 Qc7 22.Ne1 Rb8 23.f4 b6 24.d4 bc5 25.dc5 Rb7 26.Nb3 Ra7 27.Ra7 Na7 28.Na5 Nb5 29.Nc2 Nc5 30.fe5= Nd7 31.ef6+= Nf6 32.Nd4 Qe5 33.Qd2 Nd4 34.Qd4 Qd4= 35.ed4 Be8 36.h3 Kf7 37.Kf2 Ke6 38.g4 Kd6 39.Ke3 g5= 40.Kd3 Bg6 41.Ke3 Be4 42.Be4 Ne4 43.Nb7 Kc7 44.Nc5 Nc5 45.dc5?? Kb7–+ 46.Kd3 Ka6 47.Kd4 Kb5 48.Kc3 h6 49.Kb3 d4 (49...d4 50.Kc2 Kb4–+) 0–1. Reimer,Karl – Weitzel,Paul (1655), 11sen.Kurpfalz op, 2005.

3.Nc3 a5 4.Na4?? (better is 4.Bb2=) 4...ab4–+ 5.ab4 (better is 5.c3 b5 6.Nc5 bc3 7.Qc2–+) 5...b5 6.c3 g6 7.Nf3 Bg7 8.d4 (8.g3 0–0–+) 8...d6 9.Qb3 (9.Bd2 ba4 10.Ra4 Ra4 11.Qa4 Ba6–+) 9...Be6 10.Qd1 1–0. Cvikova,Katarina – Plskova,Maria, II. Ladies Slovakia Championship, Semif, 2009.

3.Nc3 d5 4.d4 Bf5 5.Nf3 e6 6.e3 Be7 7.Bd3 Nbd7 8.h3 a5 9.b5 Ne4 10.Bb2 Nc3 11.Bc3 Bd3 12.Qd3 cb5 13.Qb5 Qc7 14.Qb2 0–0 15.0–0 Rfc8 16.Rfb1? Qc3–+ 17.Qc3 Rc3 18.Rb7 Rd8 19.Ne5? Ne5 20.Re7 Nd7 21.e4 de4 22.f3 Kf8 23.Rd7 Rd7 24.fe4 Rd4 25.e5 Re4 26.Ra2 Re5 27.Kh2 Re2 28.Rb2 Rcc2 29.Rc2 Rc2 30.h4 Ra2 31.Kh3 Ra3 32.g3 a4 (33.Kg4 Rg3 34.Kg3 a3–+) 0–1. Garyman – Whiterose, ChessWorld.net, 2005.

3.Nf3 d5 4.e3 Bg4 5.h3 Bh5 6.Bb2 a5 7.b5 e6 8.c4 Nbd7 9.d4 Be7 10.Be2 cb5 11.cd5 ed5 12.Qb3 b4 13.ab4 Bb4 14.Bc3 Bd6 15.Qb7 0–0 16.0–0 Qe7 17.Ra5 Rab8 18.Qa7 Rfc8 19.Qa6 Ne4 20.Rd5 Ndf6 21.Rh5 Nh5 (worse is 21...Nc3 22.Nc3 Nh5 23.Nb5+/–) 22.Be1 Nhf6 23.Bd3 Ra8 24.Qb5 Rcb8 25.Qc4 Rc8 ½–½. Crawford,Gary T (2085) – Bendig,Frank (2350), IECG, 2006.

3.Bb2 a5

(--> 1.b4 c6 2.Bb2 a5 3.a3 Nf6).

4.b5 e6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 a5 4.b5 c6).

3.Bb2 d5

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

4.e3 e6 5.Nf3 Nbd7 6.c4 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.Nf3 e6 5.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3).

3.Bb2 d6

4.c4 e5 5.e3 Be7 6.d3 (6.Nc3 0–0=) 6...0–0 7.Nd2 a5 8.Ngf3 Bg4 (8...Be6 9.Be2=+) 9.Be2 Na6 (9...ab4 10.ab4 Ra1 11.Qa1=) 10.b5 Nc5 11.a4 (11.0–0 Bf5=) 11...e4 (11...Bf5 12.Nb3 e4 13.de4 Nfe4 14.Nfd4=) 12.de4= Nfe4 13.0–0 Bf6 14.Bf6 Qf6 (worse 14...gf6 15.Ne4 Ne4 16.Nd4+–) 15.Nd4?? (better 15.Ne4 Ne4 16.Nd4 Be2 17.Qe2=) 15...Nc3–+ 16.Qe1 (16.Bg4 Nd1 17.Rfd1 cb5 18.cb5–+) 16...Be2 (16...Ne2?! 17.Ne2 Rae8 18.Nd4=+) 17.Qc1 (17.Ne2 Nd3 18.Ne4 Ne4 19.Qb1 Ndf2 20.Ra2 cb5 21.cb5–+) 17...Bf1 18.Qc3 Bd3 19.bc6 (19.Rc1 Bg6 20.bc6 Nd3–+) 19…bc6 0–1. Rudol,Matylda – Pietinen,Pekka (2015), Festiwal Szachowy – Konik Morski Rewal Poland, 2013.

4.Bf6 ef6 5.e3=.

3.Bb2 e6

4.e3 d5 5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3).

4.e3 Be7 5.Nf3 0–0 6.Be2 a5 7.0–0 ab4 8.ab4 Ra1 9.Ba1 Bb4 10.Nc3 d5 11.Na2 Bd6 12.c4 dc4 13.Bc4 b5 14.Bb3 b4 15.Qc2 Ba6 16.Rc1 Bd3 17.Qd1 c5 18.Ne1 Be4 (Unregistered player White disconnected and forfeits 0–1). Machete99 – guest573, ICC, 2002.

3.e3 d5

4.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.a3).

4.Nf3=.

3.e3 d6

4.d4 Nbd7 5.Nc3 e5 6.e4 d5 7.ed5 cd5 8.de5 Ne5 9.Bg5 +=.

4.d4 Nbd7 5.Nf3 a5 6.b5 e5 7.de5 de5 8.Bb2=.

4.d4 Nbd7 5.Nf3 e5 6.de5 de5 7.Bb2 e4=.

4.d4 e5 5.Bb2=.

4.Nf3 e5 5.Bb2 Be7 6.Be2 e4 7.Nd4 c5=.

2.a4 a5

3.ba5 Ra5 4.d3 b5 5.Nc3 b4 6.Ne4 d5 7.Nd2 Nf6 8.Nb3 Ra8 9.Nf3 Nbd7 10.Bf4 Bb7 11.a5 h6 12.e3 g5 13.Bg3 Bg7 14.Ra4 c5 15.Ne5 h5 16.f4 Ne5 17.fe5 Nd7 18.d4 Qc8 19.Bb5 Bc6=+ 20.Bc6 Qc6 21.Ra2 cd4 22.ed4 h4 23.Bf2 Qc7 24.Be3 h3 25.g3 f6 26.0–0 Ra6? 27.Qd3+/– Re6 28.Qg6+– Kf8 29.Bg5 Rg8 30.Qf5 Kf7 31.ef6 ef6 32.Qd5 Rge8 33.Bd2 Kg8 34.Bb4 Bf8 35.Bf8 Kf8 36.Qf5 Re2 37.Qh3 Qc6 38.a6 Kg8 39.a7 Nb6 40.Qg4 Kh8 41.Qh3 Kg8 42.Qg4 Kh8 43.Qh3 Kg8= ½–½. Crafty 19.01 – Comet B25, 2004.

3.ba5 Nf6 4.Bb2 Ra5 5.Nf3 d5 6.e3 e6 7.c4 Bd6 8.d4 b6 9.Nbd2 0–0 10.Bd3 Nbd7 11.0–0 Bb7 12.Qc2 Qa8 13.Rfb1 Bb4 14.Ba3 Ba3 15.Ra3 Kh8 16.Qb2 Ra7 17.cd5 ed5 18.Bf5 Ra6 19.a5 Bc8 20.Rba1 Ra5 21.Ra5 ba5 22.Qa3 a4 23.Bc2 Re8 24.Ba4 Bb7 25.Bc2 Qb8 26.Qb3 Kg8 27.Bf5 Bc8 28.Qb8 Nb8 29.Bd3 Nbd7 30.Nb3 Ng4 31.Ra7 Nb8 32.Nc5 Be6 33.Rb7 Nf6 34.Ne5 Rc8 35.h3 Ne8 36.Re7 Kf8 37.Ra7 Nf6 38.f4 Rd8 39.Ra8 Re8 40.f5 Bf5 41.Bf5 Kg8 42.Kf2 g6 43.Bc2 Kh8 44.Nf7 Kg8 45.Ne5 Rf8 46.Ke2 Nh5 47.Ba4 Nf6 48.g4 Kh8 1–0. COMP – COMP, 2002.

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

3.c3 e5 4.Ba3 d5 5.e3 Nf6 6.f3 Bf5 7.d3 ab4–+ 8.Bb4 Qb6 9.Bf8 Qe3 10.Qe2 Qc1 11.Kf2 Kf8 12.Qd2 Qd2 13.Nd2 Nbd7 14.Nh3? Nc5 15.Ke3 Ra4 16.Ra4 Na4 17.c4 d4 18.Kf2 Nc5 19.Be2 Nd3 20.Bd3 Bd3 21.Ra1 Ke7 22.Ra7 Rb8 23.c5 Nd7 24.Ra3 Nc5 25.f4 e4 26.Ng5 e3 27.Ke1 ed2 28.Kd2 Bf5 29.Nf3 Rd8 30.Ra5 Nb3 31.Ke2 Na5 32.Kd2 Be4 33.Ng5 Nb3 34.Ke2 Bg2 35.Nh7 d3 36.Kf2 d2 37.Kg2 d1Q 38.Kg3 f5 (39.Nf6 Qg1 40.Kh4 Rh8 41.Nh7 Rh7#; 38...Qg1 39.Kf3 Nd2 40.Ke2 Qf1 41.Ke3 Qf3#) 0–1. Huber,Rick – Schirmer,Michael, corr ICCF EU–I–1525, 1988.

3.c4 ab4=+ 4.d4 Nf6 5.Nf3 d6 6.Bf4 Nbd7 7.Nbd2 c5 8.e3 g6 9.Bd3 Bg7 10.0–0 Nh5 11.Bg5 h6 12.Bh4 g5 13.Bg3 Ng3 14.hg3 (14.fg3 0–0–/+) 14...cd4 15.Nd4 Nc5 16.Bc2 h5 17.Qb1 h4 18.gh4 gh4 19.Qb4 h3 20.g3 h2 21.Kh1 Ra6 22.N2f3 Bd7 0–1. Big Giant Head – Da Wabbit, ChessWorld.net, 2002.

2.a4 Qb6

3.Ba3 d6 4.Nf3 Nf6 5.c4 e5 6.Nc3 e4 7.Ng5 Bf5 8.a5 Qd8 9.d3 e3 10.fe3 Be7 11.e4 Bg4 12.h3 Bd7 13.e3 0–0 14.Be2 Re8 15.0–0 h6 16.Nf3 Bf8 17.Nd4 Re5 18.Qb3 Rg5 19.Kh1 Bc8 20.Nf5 Be6 21.Bb2 Na6 22.Nd4 Bd7 23.Rf2 Be7 24.Raf1 Qf8 25.Nf5 Bf5 26.ef5 Re8 27.e4 Nh5 28.h4 Rg3 29.Bh5 1–0. Wall,Bill – Bahtender, Microsoft Gaming Zone, 1999.

3.b5 cb5 4.ab5 Qb5 5.Nc3 Qc6 6.e3 a6 7.Nf3 d6?? 8.Nd4?? Qc7 9.Ndb5!+– Qd8 10.Nd5 ab5 11.Ra8 Bd7 12.Nc3 b4 13.Nd5 b3 14.cb3 e6 15.Nb6 Bc6 16.b4 Qb6 17.Rb8 Ke7 18.Qb3 Qa7 19.Rc8+– Nf6 20.b5 Kd7 21.Rf8 Bd5 22.Rf7 Ke8 23.Rb7 Qb7+/– 24.Qa4 Bg2+= 25.Bg2 Qg2 26.b6 Nd7 27.Rf1+/– Ke7 28.Ba3 Qh2 29.b7 Rb8 30.Qd4 Qe5= 31.Qh4 Nf6 32.Qb4 Qd5 33.Rg1 g6 34.Qc3? Rb7–+ 35.Bb2 Qf5 36.Ke2?? Qb5–+ 37.Kf3 Qb2 38.Qc6 Qb5 39.Qc3 Qh5 40.Kg2 Qg4 41.Kh2 Qh4 42.Kg2 Qg5 43.Kh1 (43.Kh2 Qh6 44.Kg2 Ne4–+) 0–1. Sheldrick,Kevin – Steffensen,Neil, Australia ch jr, 1992.

3.c3 Nf6 4.d3 (4.a5 Qc7=) 4...e6 (4...a5 5.ba5 Qa5 6.e4=+) 5.e4= e5 (5...a5 6.Be3 Qc7 7.ba5 Ra5 8.Qb3=) 6.Nf3 d6 (6...Qc7 7.d4 ed4 8.e5=) 7.a5 (7.Be2 Qc7=) 7...Qc7 8.Be2 Be7 9.0–0 h6 (9...0–0 10.Re1=) 10.Qc2 (10.Be3 Ng4+=) 10...0–0 11.d4 ed4 (11...Nbd7 12.Nbd2=) 12.cd4 d5 13.e5 Ne4 14.Nc3 Bb4?? (Better is 14...Nc3 15.Qc3 Bf5=) 15.Nd5+– (15...Qd8 16.Nb4+– (16.Qe4?! cd5 17.Qd3 Ba5=)) 1–0. NN – Naggi, internet, 2002.

3.Ba3 g6

4.a5 A) 4...Qd4 5.Nc3 (5.c3 Qf6= 6.e4 d5 7.ed5 cd5 8.Nf3 e5 9.Be2 e4=; 5.Ra2 Qc4 6.Nc3 Bg7 7.e4 Qe6 8.Nge2 d5 9.Nf4 Qf6=) 5...d5 6.Nf3 Qg4 7.h3 Qd7 8.e4 Bg7 9.ed5 Bc3+=; B) 4...Qc7 5.e4 (5.Nf3 Bg7 6.d4 d5 7.Nbd2 Nd7 8.e4 de4 9.Ne4 Ngf6=; 5.e3 d5 6.Nf3 e5 7.b5 Bg7 8.Bb2 Bg4 9.Be2 Ne7=; 5.d4 Nf6 6.Nf3 d5 7.e3 Bg7 8.Be2 b5 9.0–0 0–0=; 5.Nc3 d5 6.e3 e5 7.b5 Bg7 8.Nf3 Nf6 9.b6 ab6=; 5.c4 Nf6 6.d4 e5 7.e3 d5 8.Nc3 Bg4 9.f3 Be6=; 5.Bb2 f6 6.e4 e5 7.c3 d5 8.ed5 cd5 9.Nf3 Nc6=) 5...Nf6 6.Bb2 d5 7.ed5 cd5 8.Bb5 Bd7 9.Bd7 Nbd7+=; C) 4...Qd8 5.e4 (5.Bb2 Nf6 6.e4 Bg7 7.Nf3 d6 8.Bd3 b5 9.ab6 Qb6=; 5.e3 Nf6 6.Bb2 Bg7 7.Nc3 d5 8.Nf3 0–0 9.Be2 Bg4=; 5.Nc3 Bg7 6.e4 d5 7.ed5 cd5 8.Nf3 Nc6 9.Bb5 Nf6=; 5.Nf3 Bg7 6.d4 Nf6 7.e3 0–0 8.Bd3 d5 9.0–0 b5=; 5.d4 Nf6 6.e3 Bg7 7.Nf3 d5 8.Be2 0–0 9.0–0 b5=) 5...Bg7 6.d4 d6 7.Nf3 Bg4 8.c3 Nf6 9.Bd3 0–0=.

4.e3 Bg7 (4...d5 5.d4 (5.a5 Qc7 6.Nf3 Bg7 7.d4 Nf6 8.Be2 0–0 9.0–0 Bg4=; 5.Nf3 Bg7 6.a5 Qc7 7.d4 Nf6 8.Be2 0–0 9.0–0 Bg4=; 5.c4 Bg7 6.d4 e5 7.a5 Qc7 8.Bb2 Be6 9.Nf3 ed4=; 5.Nc3 Bg7 6.a5 Qc7 7.Nf3 e5 8.Bb2 Nf6 9.Be2 0–0=) 5...Nf6 6.a5 Qd8 7.Be2 Nbd7 8.Nf3 Bg7 9.0–0 0–0+=; 4...Nf6 5.d4 (5.a5 Qc7 6.d4 d5 7.Nf3 Bg7 8.Be2 0–0 9.0–0 Bg4=; 5.Nf3 Bg7 6.a5 Qc7 7.Bb2 0–0 8.Be2 d6 9.0–0 Bf5=; 5.Nc3 Bg7 6.Nf3 d5 7.a5 Qc7 8.Be2 0–0 9.0–0 b5=; 5.c4 d6 6.c5 dc5 7.bc5 Qa5 8.Qb3 Na6 9.Bc4 e6=; 5.Be2 Bg7 6.a5 Qc7 7.Nf3 d6 8.0–0 0–0 9.d4 Bf5=; 5.Ne2 Bg7 6.d4 d5 7.Nd2 0–0 8.c4 Nbd7 9.b5 c5=) 5...Bg7 6.Nf3 d5 7.Be2 0–0 8.0–0 Bg4 9.Nbd2 Nbd7+=) 5.d4 (5.a5 Qc7 6.d4 d5 7.Nf3 Nf6 8.Be2 0–0 9.0–0 Bg4=; 5.Nc3 d5 6.a5 Qc7 7.Nf3 e5 8.Bb2 Nf6 9.Be2 Qd6=) 5...d5 6.c4 (6.a5 Qc7 7.Nf3 Nf6 8.Be2 0–0 9.0–0 Nbd7=) 6...dc4 (6...Bf5 A) 7.a5 Qc7 (7...Qd8 8.Nf3 Nf6 9.Be2 dc4=) 8.Nf3= Nf6 9.Be2 0–0=; B) 7.Nf3 Nf6 8.Be2 dc4 9.Bc4 0–0=; 6...e5 7.a5 Qc7 8.Bb2 Be6 9.Nf3 ed4=) 7.Bc4+= Nf6 8.Nf3 0–0 9.0–0 Ne4 (9...Bg4+=) 10.Nbd2 Nd6 11.Bd3 Be6 12.Ng5 (12.Qc2 Rd8+=) 12...Bc8 (12...Bf5 13.Nc4 Nc4 14.Bc4+=) 13.Nc4 Qd8 14.Ne4 Re8 15.b5 Ne4 16.Be4 Be6 17.bc6 Nc6 (17...Bc4?? 18.cb7 Nc6 19.ba8R Qa8 20.Rc1 Bf1 21.Bc6+– (21.Rc6?! Ba6+–)) 18.d5 (better is 18.Rc1!? Bd5 19.Qf3 Be4 20.Qe4+=) 18...Ba1+= 19.Qa1? (better is 19.dc6!? bc6 20.Qd8 Red8 21.Na5–/+) 19...Bd5–+ 20.Rd1 Bc4 (20...Be4 21.Rd8 Red8 22.h3–+) 21.Rd8 Rad8 22.h4 f6 23.Qb1 Ne5 24.f4 Ng4 25.Bg6= Ne3 26.Bh5 Bf7?? 27.Bf7+– Kf7 28.Qh7 Kf8 29.Be7! Re7 30.Qh8 Kf7 31.Qd8 Ng4 32.Kf1 Ne3 33.Kf2 Ng4 34.Kg3 f5 35.h5 Re3 36.Kh4 Nf6 37.Qc8 Re1 38.Qb7 Ke6 39.Qc8 Kf7 40.Qf5 Rh1 41.Kg3 Rh5 42.Qc2 Rd5 43.Kf3 Rd4 44.Qc7 Rd7 45.Qc4 Kg6 46.g4 (46.g4 Kg7 47.g5+–) 1–0. Reimanis,R (2145) – Laitinen,Mi (1985), WYb16 Kemer TUR, 2007.

3.c3 a5

4.ba5 Qa5 5.d4=.

4.Qb3 d5 5.e3 e5 6.b5 Be6 7.c4 cb5 (better 7...Nd7!?=+) 8.cd5+= Qc5 (better 8...Bd7+=) 9.ab5?? (better 9.Bb5 Bd7 10.Ba3+–) 9...Qc1–+ 10.Ke2 Bd7 11.Nf3 Qc7 12.g3 (12.d4 ed4 13.Nd4 Nf6–+) 12...Nf6 13.Bg2 Qc5 (13...e4 14.Ne1–+) 14.Nc3 (14.Ne5 Bb5 15.d3 a4–+) 14...Bd6 (better 14...a4!? 15.Ra4 Ra4 16.Qa4 Nd5 17.Qb3 Nc3 18.dc3 Bb5 19.Ke1–+) 15.d4 ed4 16.Nd4 0–0 17.Rhc1 (17.Na4 Qa7 18.Rhd1 Rc8–+) 17...Qb6 (17...Be5 18.Ra4–+) 18.Ne4 (18.Na4 Qd8–+) 18...Ne4 19.Be4 Be5 20.Rd1 Bd4 21.Rd4 Qb5 22.Qb5 Bb5 23.Ke1 Nd7 24.d6 Bc6 25.Bf5 Nf6 26.e4 (26.g4–+) 26...g6 27.e5 Rfe8 (27...gf5?! 28.ef6 Rfe8 29.Kd2–+) 28.Bd3 (28.Kd2 Re5 (28...gf5?! 29.ef6 a4 30.Kc3–+) 29.Bd3 Rd8–+) 28...Re5 29.Kf1 a4 (29...Rd8 30.Bc4–+) 30.f4 Rc5 31.Rd5 (31.f5 Rd8–+) 31...Rc2! 32.Rd4 (32.Bc2 Nd5) 32...Rd8 (better 32...Rh2 33.Ra3 Re8 34.f5–+) 33.Rc4?? (33.Bc2 b5 34.Rad1 Ng4+=) 33...Bh1 (better 33...Rh2 34.Rca4 Ba4 35.Ra4 Rd6 36.Kg1–+) 34.d7?? (34.Bc2 Rd6 35.Ba4 Bd5+=) 34...Ne4 (better 34...Rc4 35.Bc4 Bc6 36.Rc1–+) 35.Be4?? (better 35.Rc2 Rd7 36.Be2+–) 35...Rf8 (better 35...Rc4 36.Bh1 Rd7–+) 36.d8R Re2?? (36...Rd8 37.Kg1) 37.Rdd4 (better 37.Rf8 Kf8 38.Ke2 Be4 39.Re4 Kg7+–) 37...Rc2 (37...Re4 38.Re4 b5+–) 38.Rc8 (better 38.Rc2 Be4 39.Re4 Kg7+–) 38...Rc6?? (better 38...Rfc8!? 39.Bh1 b5=) 39.Re1 (better 39.Rf8!? Kf8 40.Bh1 Rc2 41.Bb7 Rh2 42.Raa4 Rc2+–) 39...a3?? (39...Rcc8 40.Bh1 b5 41.Rb4+–) 40.Ra1 (40.Rf8 Kf8 41.Bh1 Rc2+–) 40...h6?? (40...Rfc8 41.Bc6 (41.Bh1?! Rc1 42.Rd1 Rd1 43.Rd1 b5=) 41...bc6 42.Kf2+=) 41.Rd3 (41.Rf8 Kf8 42.Bh1 Rb6+–) 41...a2?? (better 41...Be4 42.Rf8 Kf8 43.Rda3 f5+=) 42.Rf8+– Kg7 (42...Kf8 43.Bh1 Rb6+–) 43.Ra3 (better 43.Bh1 Kf8 44.Bc6 bc6 45.Ra2 Ke7+–) 43...b5 (43...Be4 44.Rb8 Bd5 45.R3a2 Ba2 46.Ra2 Rc1 47.Kg2 Rb1+–) 44.Rc1 (better 44.Bh1 Rd6 45.Rb8+–) 44...f6 (better 44...Rc1 45.Ke2 Kf8 46.Ra8 Kg7 47.Ra2 Be4–+) 45.Re3 (45.Rc6 a1R 46.Ra1 Bg2 47.Kg2 Kf8 48.Ra7 b4 49.Rc8) 45...Rc3 (better 45...Rc1 46.Kf2 a1Q–+) 46.Bd5 (46.Bd5 Rc1 47.Ke2 Bd5 48.Rd8 Bc4 49.Kf3–+; 46.Rec3 Kf8 47.Bh1 Ke7 48.Re3 Kd6 49.Rd3 Ke6 50.Re1 Kf5 51.Be4 Kg4 52.Bf3 Kh3 53.Bg2 Kh2 54.g4 a1Q 55.Rh3). RichardSommer (2090) – Leo_68 (2145), lichess.org, 2020.

4.b5=.

3.c3 e5

4.a5 Qb5?? 5.Na3 (better is 5.e4 Qf1 6.Kf1+–) 5...Qd5= 6.d4 (6.d3 f5=) 6...Nf6 (6...ed4 7.e3 dc3 8.Qd5 cd5 9.b5=+) 7.Nf3 (7.e3 d6=) 7...d6 (7...ed4 8.Nd4 c5 9.bc5 Bc5 10.Nab5=) 8.c4= Qe4 9.e3 Bg4 (9...Be7 10.Be2=) 10.Bd3+= Bf3 11.gf3 Qh4 12.b5 (better is 12.Nc2+=) 12...Nbd7? (12...ed4 13.bc6 bc6 14.Qb3=) 13.h3 ed4= 14.ed4 d5 15.a6+/– ba6? 16.bc6 Bb4 17.Bd2 Bd2 18.Qd2 h6?? 19.cd5 Qd4 20.Nc2 Qe5 21.Ne3?? Qa1–+ 22.Nd1 Ne5 23.Bf5 Nf3 24.Ke2 Nd2 25.Kd2 Qa2 26.Ke1 Qd5 27.Bd7 Nd7 28.cd7 Qd7 29.Ne3 0–0 30.h4 Qe6 31.Rg1 f5 32.h5 f4 33.Rg6 Rf6 34.Ke2 Rg6 35.Kd3 Rg5 36.Nc4 Rd8 37.Kc3 Rb5 38.Na3 Rc8 39.Kd3 Rb3 40.Kd4 Ra3 (41.f3 Rc4#) 0–1. jordan2delta – Mokolato, internet, 2006.

4.a5 Qc7 5.d4=.

4.a5 Qc7 5.e3 d5+= 6.d3 Bd6 7.e4 Ne7 8.Be2 0–0 9.Bg5 (9.Nf3 d4+=) 9...f6 10.Bh4 Ng6 11.Bg3 f5 12.ef5 Bf5 13.Nf3 Nd7 14.0–0 Rae8 15.Nbd2 Nf6 16.Nh4 (16.Re1 Nh5–/+) 16...Nh4–/+ 17.Bh4 e4 18.de4 (18.Bf6 Bh2 (18...gf6?! 19.de4 Be4 20.g3+=) 19.Kh1 ed3= (19...gf6?! 20.g3+=)) 18...Ne4 19.Ne4 Bh2 (19...de4?! 20.Qb3 Kh8 21.Bg3+=; 19...Be4?! 20.Bg3+=; 19...Re4?! 20.Bg3+=) 20.Kh1 Be4 (20...de4 21.g3 Bh3 22.Qb3 (worse is 22.Kh2 Bf1 23.Qf1 Qe5–/+) 22...Kh8 23.Kh2 Bf1 24.Rf1–/+) 21.Bh5 g6 22.Bg4 Be5 23.Ra3 Qg7 24.f3?! (24.c4 Bb2 25.Rh3 dc4–+) 24...Bf5 (24...Qh6 25.Qe1 Bd3 26.Rg1–+) 25.Bg5 (25.Bf5 Qh6 (25...gf5?! 26.Qd2–+) 26.Qe1 Rf5–+) 25...Bc3 (25...Bg4 26.fg4 Rf1 27.Qf1 Bc3 28.Qf2 Bb4 29.Ra4 Re1 30.Kh2 Ba5 31.Ra5 Qc7 32.Qf4 Qf4 33.Bf4–+) 26.Rb3 (26.Bf5 Rf5 27.g4 Rg5–+) 26...Bg4 27.fg4 Rf1 (27...Rf1 28.Qf1 Re1 29.Qe1 Be1–+) 0–1. Tagirov,Kajum K (1915) – Khakimzianov,Rinat, Ufa Dautov Memorial, 2007.

4.Nf3=.

2.a4 e5

3.Bb2 f6 4.b5 d5 5.e3 (--> 1.b4 e5 2.Bb2 f6 3.b5 d5 4.e3 c6 5.a4).

3.Bb2 Bb4

4.Be5 Nf6

5.Bb2 0–0 6.Ba3 Ba3 7.Ra3 Re8 8.c4 d5 9.cd5 Nd5 10.e3 Bf5 11.Nf3 Nb4 12.Rc3 Qa5 13.Nd4 Bg6 14.Be2 Nd7 15.Na3 Nd5 16.Rc4 N5b6 17.Nb3 Qd5 18.Rd4 Qg2 19.Bf3 Qg5 20.a5 Nd5 21.h4 Qe7 22.Nc2 (22.h5!? Bf5 23.Bd5 Qa3 24.Rf4 cd5 25.Rf5–/+) 22...Nc5–+ 23.Nc1 Rad8 24.Bd5 Rd5 25.Rd5 cd5 26.f3? (better is 26.d3–+) 26...Qc7 27.Nb4 (27.Rg1–+) 27...Qg3 28.Kf1 Bh5 29.Rg1 Qh3 30.Kf2 (30.Ke1 Bf3 31.Qc2 Qh4 32.Kf1 Qb4–+) 30…Ne4! (30...Ne4 31.fe4 Qh4 32.Kf1 Bd1 33.Nd5 Re4–+) 0–1. Williams,Barry Mansell – Short,Allan J, NZCCA TT res corr9900, 1999.

5.c3 Ba5 6.Bd6 Bc7 (6...Ne4 7.Bf4=+) 7.Bc7= Qc7 8.Nf3 d5 9.e3 0–0 10.d4 c5 11.Be2 c4 12.0–0 Nc6 13.Nfd2 (13.Qc2 Re8=+) 13...Bf5 14.f3 Qb6 (14...Na5 15.Na3=+) 15.Na3= Qa5 16.Qc1 a6 17.e4 Bg6 18.Rd1 Rfe8 19.Qb2 Nd4 20.cd4 c3 21.Qb7 cd2 22.e5 Qc3 23.ef6 Rab8 24.Qa6 Qd4 25.Kh1 Re6 26.Qa5 Re2 27.h3 Rbe8 28.Rf1 Qa1!! 29.Ra1 Re1 30.Kh2 Ra1 31.Qd2 Ra3 32.Qd5 Ra4 33.Qc6 Raa8 34.fg7 Kg7 35.Qc3 Kg8 36.g4 Rad8 37.Kg3 Rd3 38.Qc6 Ree3 39.Kf4 Kg7 40.Qa8 Rf3 41.Qf3 Rf3 42.Kf3 h5 43.Ke3 hg4 44.hg4 Bc2 45.Kf4 Kf6 46.g5 Kg6 47.Kg4 Bf5 48.Kf4 Bd7 49.Ke4 Kg5 50.Ke3 f5 51.Kf2 Kg4 52.Kf1 f4 0–1. themonkey (2135) – ChadCVB (2200), GameColony.com, 2002.

5.c3 Be7

6.e4 d5 7.ed5 cd5 8.Nf3 0–0 9.Bb5 a6 10.Bd3 Nc6 11.Bf6 Bf6 (Worse is11...gf6 12.Qc2 h6 13.0–0+=) 12.0–0 Qc7 13.Re1 Nb4 14.Bc2 (14.Be2!? Bf5 15.Na3=+) 14...Nc2–/+ 15.Qc2 Bg4 16.Qd3 Rfe8 17.Re8 Re8 18.Qd5 Bf3 19.gf3 Re1 20.Kg2 Be5 (Better is 20...Qb6!?–+) 21.h3–/+ h6 22.f4 Bf4 23.a5 Bh2 24.Qf5 (24.Ra4 Bg1 25.f4–+) 24...g6 25.Qf6 (25.Qg4–+) 25...Bg1 26.Kf3 (26.Qc6 Qh2 27.Kf3 Qh3 28.Kf4 Bh2) 26...Qh2 27.Qd8 Kh7 (28.Qh4 Qh1 29.Kg4 f5 30.Kf4 Re4 31.Kg3 Bh2) 0–1. lucya (2130) – chief81st (1790), GameColony.com, 2002.

6.Nf3 0–0 7.Bf6 Bf6 (< 7...gf6 8.e3+=) 8.Qc2 d5 9.e3 c5 10.Bd3 g6 11.0–0 Qe7 12.a5 Nc6 13.Be2 Bf5 14.Qb3 c4 15.Qd1 Bg7 16.d4 Rac8 17.Nbd2 Rb8 18.Qa4 Rfe8 19.Qb5 Red8 20.Rfe1= a6 21.Qb6 Rd6 22.Qc5 Rc8 23.Qa3 Rd7 24.Qa4 Re8 25.Ra2 Na7 26.e4 Nb5 27.Qc2–/+ de4 28.Bc4 Nd6 29.Qa4 Qd8 30.Ne5 Be5 31.de5 Re5 32.Qb4 Nc4 33.Nc4 Rb5 34.Qa4 Rd3 35.Rc2 Qc7 36.Nb6 Qc5 37.Nc4 Bd7 38.Nd2 Rb2! 39.Ne4 Ba4 40.Nc5 Bc2 41.Nd3 Bd3 0–1. orane (2005) – mrduo, Live Game Caissa's Web, 2004.

6.Nf3 d5 7.a5 0–0 8.Qb3 Ng4 9.Bf4 c5 10.d4 Nc6 11.Qb5 a6 12.Qb6 Qb6 13.ab6 Bf5 14.Nbd2 cd4 15.Nd4 Nd4 16.cd4 Rfc8 17.h3 Nf6 18.g4 Be4 19.Rg1 Bb4 20.g5 Nd7 21.Bc7 Bc3 22.Ra4 Bc2 23.Ra2 Bd4 24.Rc2 Bb6 25.Bg2 Bc7 26.Nb3 Nb6 27.h4 Bh2 28.Rc8 Rc8 29.Rh1 Bd6 30.Kd1 Na4 31.e3 b6 32.Ke2 Rc2 33.Kf3 Be5 34.Nd4 Bd4 35.ed4 Nc3 36.Ra1 a5 37.Ke3 Re2 38.Kd3 Rf2 39.Rg1 Ne4 40.Ke3 Rc2 41.Be4 de4 42.Rb1 Rc6 43.Ke4 Re6 44.Kd5 h6 45.Kc4 Kh7 46.Rf1 hg5 47.hg5 Kg6 48.Rg1 Kh5 49.Rf1 Re7 50.Rg1 Re3 51.d5 Re2?? 52.Rd1+= Kg6 53.d6. pierred – fatontaraku, Yahoo, 2005.

6.Nf3 d6 7.Bf6 Bf6 8.e3 0–0 9.d4 d5 10.Bd3 Re8 11.0–0 Bg4 12.Nbd2 c5 (12...Qc7!?=) 13.Qb1+/– Bc8 14.Bh7 Kh8 15.Bf5 Nc6 16.Bc8 Qc8 17.Qb5 Ne7 18.Rab1 Rb8 19.Qa5 Ra8 20.Qc5 Qc5 21.dc5 Bc3 22.Rb7 1–0. b4_player (2210) – Raspoutine (2270), GameColony.com, 2003.

3.Bb2 Qc7

4.b5 d5 5.e3 f5 6.Nf3 Bd6 7.h3 (7.bc6 bc6 8.c4 Nd7=) 7...Nf6=+ 8.c4 0–0 9.Nc3 (9.c5 Bc5 10.Be5 Bd6=) 9...e4 10.Nd4 c5 11.Nb3 Be6 12.cd5 Nd5 13.Bc4 Qf7 14.Nd5 Bd5 15.Bd5 Qd5 16.Qc2 Nd7 17.0–0 Ne5 18.Qc3 (18.Qc3 Rf7 19.Nc1–/+; 18.Be5!? Be5 19.Rac1=+). RichardSommer (2010) – RapidLight (2025), lichess.org, 2020.

4.Nf3 f6 (4...e4 5.Nd4=+) 5.b5= d5 6.e3 Bg4 7.Be2 Bd6 8.h3 Bh5 9.Nc3 Ne7 10.bc6 Nbc6 (10...bc6 11.0–0=) 11.Nb5 Qb8 (better is 11...Qd7!?=) 12.Ne5+/– Be2 (12...fe5 13.Nd6) 13.Nc6 Bd1 (13...bc6 14.Nd6 Qd6 15.Qe2+/–) 14.Nb8 Bb8 15.Kd1 a6 (15...Kd7 16.f4+/–) 16.Nd4 0–0 (16...b6 17.Rb1+/–) 17.Ba3+– Re8 (17...Rf7 18.Rb1 Nc6 19.Nc6 bc6 20.Rb6+–) 18.Rb1 b5 (18...Nc6 19.Rb7 Na5 20.Rd7+–) 19.ab5 Be5? (better is 19...ab5 20.Nb5 Kf7+–) 20.b6 Rab8 21.Re1 (21.b7 g6+–) 21...Bd4 (21...Rb7 22.Be7 Ree7 23.Ne2+–) 22.ed4 Kf7 (22...Nc6 23.Re8 Re8 24.b7+–) 23.b7 Nc6 24.Bd6 Re1 25.Ke1 Re8 26.Kf1 Nb8 27.Re1 Rd8 28.Bc7 Rg8 29.d3 Nc6 (29...g5 30.c4+–) 30.c4 dc4 (30...Nb8 31.c5 Nc6 32.Ra1+–) 31.dc4 a5 (31...Nd4 32.b8R Rb8 33.Bb8+–) 32.d5 Nb8 (32...Nd4 33.c5+–) 33.d6 Kg6 (33...Nc6 34.d7+–) 34.Bb8 Rb8 35.d7 a4 36.c5 a3 37.c6 a2 38.c7 Rb7 39.d8Q (39.c8Q Rd7 40.Qd7 Kh6 41.Qg4 g5 42.Qf5 a1Q 43.Ra1 g4 44.Qf6 Kh5 45.Ra5) 39...Rb1 40.Qd3 (40...Kf7 41.Rb1 ab1Q 42.Qb1 Ke7 43.Qe4 Kd7 44.Qb7 Kd6 45.Qb6 Ke7 46.c8Q Kf7 47.Qbc7 Kg6 48.Qg4 Kh6 49.Qcg7) 1–0. NN – MullahKrekar, internet, 2002.

3.Bb2 d6

4.e3 (--> 1.b4 e5 2.Bb2 d6 3.e3 c6 4.a4).

3.b5

3.b5 (--> 1.b4 e5 2.b5 c6 3.a4).

3.b5 d5 4.Bb2 Bd6 5.e3 (--> 1.b4 e5 2.b5 d5 3.Bb2 Bd6 4.e3 c6 5.a4).

2.a4 e6

3.Bb2 (--> 1.b4 e6 2.Bb2 c6 3.a4).

2.Bb2 a6

3.a3 e6 4.e3 Nf6 5.Nf3 g6 6.g4 Bg7 7.g5 Nh5 8.Bg7 Ng7 9.Nc3 d5 10.a4 Nd7 11.Ra3 (11.e4 h6 12.gh6 Rh6=) 11...e5=+ 12.Qa1 0–0 13.h4 e4 14.Nh2 h5 (better 14...f6!?=+) 15.gh6+= Nf5 16.Ng4 Kh7 17.Ne2 f6 18.Nf4 Qe7 (18...Nh6? 19.Ne6 Qe7 20.Nf8 Qf8 21.Nh6 Kh6 22.Rb3+–) 19.Rg1 (19.h5 gh5 20.Nh5 Qb4+–) 19...Ne5?? (better 19...Nh4 20.Nh2 g5–/+) 20.Ne5+– fe5?? (20...Qe5 21.Ng6 Qa1 22.Ra1 Rg8=) 21.Ng6+– Qf6 (21...Qb4 22.Rb3 Qd6 23.Nf8 Qf8 24.Qe5 Nh6 25.f3+–) 22.Nf8 Qf8 23.Qe5 Bd7 (23...Nh6 24.c4 Qf7 25.cd5 cd5 26.Rc3+–) 24.Bh3 Kh6 (24...Re8 25.Qc7 Re7 26.Bf5 (worse 26.Qb7 Nd6 27.Qa6 Bh3 28.Qc6 Nc4 29.Qg6 Kh8 30.Qg7 Qg7 31.hg7 Rg7 32.Rg7 Kg7+–) 26...Bf5 27.Qd6+–) 25.Qf4 Kh7 26.Qg5 (better 26.Rg5 Nh6 27.Qc7+–) 26...Qf7 27.d3 ed3 (27...Nh6 28.Bd7 Rg8 29.Bf5 Nf5 30.Qg8 Qg8 31.Rg8 Kg8 32.de4 de4 33.Rc3+–) 28.Rd3 Re8 29.Kd2 (29.c4 Re4 30.f3 Rc4+–) 29...a5 (29...Nd6 30.Bd7 Ne4 31.Kc1 Ng5 32.Be8 Qe8 33.hg5+–) 30.ba5 (30.Bf5 Bf5 31.Rd4 Re4 32.ba5 c5 33.Re4 Be4+–) 30...Be6 (30...Nd6 31.Bd7 Ne4 32.Kc1 Ng5 33.Be8 Qe8 34.Rg5+–) 31.h5 (better 31.Bf5 Bf5 32.Rb3 Bc8+–) 31...Ra8 (31...Nd6 32.Qg6 Qg6 33.hg6 Kg7+–) 32.Qg6 Qg6 33.Rg6 Bd7 34.Rf6 (34.Rb3 Ra7+–) 34...Kg7 35.Bf5 Bf5 (35...Kf6 36.Bd7 Ra5+–) 36.Rf5 Ra5 37.e4! (37.e4 Kh7 38.ed5 Ra4 39.d6+–) 1–0. FeegLood (2530) – chessBS_at_Twitch (2305), lichess.org, 2015.

3.a4 e6 4.e3 Nf6 5.b5 Bb4 6.Nf3 0–0 7.Be2 d5 8.0–0 ab5 9.ab5 Ra1 10.Ba1 c5 (10...Nbd7 11.Nc3=) 11.c3+= Ba5 12.c4 Bb6 (12...Nbd7 13.Qc2+=) 13.Qc2 h6 14.d4 Nbd7 15.Nbd2 Re8 16.Bb2 Bc7 (better 16...Qe7!?+–) 17.cd5+– Nd5 (17...ed5 18.dc5 Ne4 19.c6 bc6 20.bc6+–) 18.dc5 N5f6 (18...Qe7 19.c6 bc6 20.bc6+–) 19.c6 Nb6 20.Rd1 Nbd5? (20...Qe7+–) 21.e4 Nf4 (21...bc6 22.bc6 (worse 22.ed5 cd5 23.Ne5 Bb7+–) 22...Nb4 23.Qa4 Nc6 24.Qc6+–) 22.Nc4 Ne2 (22...N6d5 23.Bf1 (worse 23.ed5 ed5 24.Bf1 bc6+–) 23...bc6 24.bc6+–) 23.Qe2 Bd7 (23...Nd5 24.Qc2 bc6 25.bc6 Qe7 26.ed5 ed5+–) 24.Bf6 (24.Rd7?! Nd7 25.cd7 Qd7+–) 24...gf6 (24...Qf6 25.Rd7 Qa1 26.Qf1 Qf1 27.Kf1 bc6 28.Rc7 cb5 29.Nd6+–) 25.Rd7 Qc8 26.Nfe5! Be5 (26...Be5 27.Qg4 Double attack (27.Qh5 Decoy); 26...fe5 27.Qh5 Double attack (27.Qh5 Decoy)) 27.Ne5 fe5 28.Qg4 Kf8 29.Qh5 Re7 30.Qh6 (30.Qh6 Kg8 31.Rd3 f5 32.Rg3 Kf7 33.Qg7 Ke8 34.Qg8) 1–0. DEFFM – GuestCQWM, freechess.org, 2019.

3.Nc3 d5 A) 4.Nf3 Nf6 (4...Qd6 5.a3 Nf6 6.e3 a5 7.Be2 Nbd7; 4...Nd7 5.e4 Ngf6 6.Bd3 e5 7.a3 Bd6) 5.g3 a5 6.a3 e6 7.Bg2 ab4; B) 4.e4 Nf6 (4...de4 5.Ne4 Nf6 6.Qe2 Ne4 7.Qe4 Nd7; 4...d4 5.Nce2 e5 6.Nf3 Nd7 7.c3 dc3; 4...e5 5.Nf3 Nf6 6.Ne5 Bb4 7.ed5 0–0) 5.Bd3 de4 6.Ne4 Nbd7 7.Qe2 Ne4; C) 4.a3 Nf6 (4...Nd7 5.e3 e5 6.Nf3 Ngf6 7.Be2 Bd6; 4...a5 5.e3 Nf6 6.Nf3 Nbd7 7.Be2 e5; 4...e5 5.g3 Nf6 6.Bg2 c5 7.e4 d4) 5.Nf3 Nbd7 6.h3 e5 7.e3 Bd6; D) 4.e3 Nf6 5.a3 e5 6.Be2 Nbd7 7.Nf3 Bd6.

3.Nc3 e6 A) 4.e4 Bb4 (4...Nf6 5.a3 a5 6.b5 Bc5 7.e5 Nd5; 4...d5 5.Nf3 Nd7 6.a3 de4 7.Ne4 Ngf6) 5.a3 Bc3 6.Bc3 Nf6 7.Bd3 d5; B) 4.a3 d5 (4...a5 5.b5 d5 6.e3 Nf6 7.Nf3 Bd6; 4...Nf6 5.e4 a5 6.b5 Be7 7.Nf3 d5) 5.e4 Nd7 6.Nf3 Ngf6 7.Bd3 de4; C) 4.e3 Nf6 (4...d5 5.a3 Nf6 6.Nf3 a5 7.b5 Bd6) 5.a3 d5 6.Nf3 a5 7.b5 Bd6; D) 4.Nf3 Nf6 5.e4 Bb4 6.e5 Nd5 7.Be2 0–0.

3.Nc3 Nf6 A) 4.e3 d5 (4...e5 5.Nf3 e4 6.Nd4 Bb4 7.a3 Bc3; 4...e6 5.a3 d5 6.Bd3 Nbd7 7.Nf3 a5) 5.Nf3 Nbd7 6.a4 e5 7.b5 Bd6; B) 4.Nf3 d5 (4...e6 5.e4 Bb4 6.e5 Nd5 7.Be2 0–0) 5.e3 Nbd7 6.a3 e5 7.Be2 Bd6; C) 4.a3 d5 (4...a5 5.Nf3 d5 6.e3 Nbd7 7.d4 e6) 5.Nf3 Nbd7 6.e3 e5 7.h3 Bd6; D) 4.e4 d5 (4...e5 5.Nf3 Bb4 6.Ne5 0–0 7.Bd3 Re8) 5.Bd3 a5 6.b5 Nbd7 7.ed5 cd5.

3.c4 d6 4.e3 e6 5.Nf3 f6 (5...e5 6.Nc3=) 6.Be2 h6 (6...d5!?+=) 7.d4+/– g6 8.a3 b6 9.Qc2 f5 10.e4 Qf6 (10...Bg7 11.e5+/–) 11.d5 (11.e5!? de5 12.Ne5+/–) 11...e5 12.ef5 (12.Nc3 Ne7+/–) 12...Bf5+= 13.Bd3 Ne7 14.Nbd2 (14.Nc3 cd5 15.cd5 Bg7+=) 14...Bd3 (better is 14...cd5!? 15.Rd1 a5=) 15.Qd3+/– Qf5 (15...cd5 16.cd5 Nf5+/–) 16.Qf5 (better is 16.Ne4!? Ng8 17.dc6 Nc6 18.Nd6 Bd6 19.Qd6+–) 16...Nf5 (16...gf5 17.dc6 Nbc6 18.Rg1=) 17.Ne4+= Bg7 (17...Be7 18.dc6 Nc6 19.Rd1+=) 18.0–0 (18.Rd1 Kd7+/–) 18...c5 (18...cd5!? 19.cd5 Kd7+=) 19.bc5 bc5 20.Rab1 (20.g4 Nd4 21.Bd4 cd4 22.Nd6 Ke7+–) 20...Nd7 21.g4 Nd4 22.Nd6 Ke7 23.Nd4 Kd6? 24.Nf3 Raf8 25.Kg2 h5 26.h3 hg4+= 27.hg4 Rf4 28.Rbc1?? Rhf8 29.Ng5?? Bh6 30.Ne6–/+ R8f7?? 31.Nf4+– Bf4 32.Rc2 g5 33.f3 Be3 34.Re2 Bd4 35.Bd4 cd4 36.Rc1 Nc5 37.Rcc2?? d3–+ 38.Red2 dc2 39.Rc2 Rf4 40.Rc3 a5 41.Kg3?! a4 42.Kg2 Rd4 43.Kg3 Nd3 44.Kg2 Rf4 45.Kg3?? Ne1 46.c5 Kd5 47.c6 Kd4?? 48.Rc1 Rf3–+ 49.Kh2 Rf8 50.Re1 Rc8 51.Rc1 Kd5 52.c7+= Kd6 53.Kg2? Rc7–+ 54.Rc7?? Kc7 55.Kf3 Kd6 56.Ke4 Ke6 57.Kd3 Kd5 58.Ke3 e4 59.Kf2 Kd4 60.Ke2 e3 61.Kd1 Kd3 62.Ke1 e2 (62...e2 63.Kf2 Kd2 64.Kg3 e1Q 65.Kg2 Qe2 66.Kh3 Ke1 67.Kg3 Kf1 68.Kh3 Qg2) 0–1. Fournier,Frederic – Vango, Partie evaluee, 5m + 0s, 2008.

3.c4 f6 4.d4 h5 5.Qc2 Kf7 6.Nf3 h4 7.e4 g5 8.e5 d6 9.Bd3 de5 10.de5 Rh6 11.0–0 Bg4 12.Nd4 e6 13.ef6 Nf6 14.f4 gf4+= 15.Ne6?? Be6–+ 16.Rf4 Bb4 17.Nd2 Qd6?? 18.Raf1 Nbd7 19.Ne4 Qe7 20.Ng5?? Ke8?? 21.Bg6+/– Kd8 22.Rf6 Kc7?? 23.Ne6+– Kb6 24.c5 Nc5 25.Bd4 Rg8 26.Rb1 Rhg6 27.Rg6 Rg6 28.Rb4 Ka5 29.Bc5 Qe6 30.Qa4# 1–0. clochard (2200) – rudycfls (1995), net–chess.com, 2005.

3.c4 Nf6 4.e3 d6 5.Nf3 (5.Bf6 ef6 6.d4 d5=) 5...h6 (5...e5 6.Be2=) 6.d4+= Ne4 (6...Bf5 7.Bd3 Bd3 8.Qd3+=) 7.Bd3 Bf5 8.Qc2 d5 9.Nbd2 (better is 9.0–0+=) 9...g6? (better is 9...Nd2!? 10.Nd2 Bd3 11.Qd3 e5=) 10.Ne4+– de4 11.Be4 e6 12.Bf5 (12.a3 Be4 13.Qe4 Bg7+–) 12...ef5 (12...Bb4!? 13.Bc3 Bc3 14.Qc3 gf5+/–) 13.a3 Rh7 (13...a5 14.b5+–) 14.0–0 f6 15.Rad1 (15.Rfe1 Kf7+–) 15...Qc7 (15...a5 16.ba5 Qa5 17.Rd3+–) 16.Rc1 (16.e4!? fe4 17.Qe4 Kf7+–) 16...Nd7 17.d5 (17.e4 fe4 18.Qe4 Kf7+–) 17...c5 (17...cd5 18.cd5 Qc2 19.Rc2+–) 18.Qc3 (18.e4 cb4 19.ef5 g5 20.Qe2 Re7+–) 18...b6 19.Rfe1 g5 20.g3 Bg7? 21.Qc2 cb4 22.ab4 Rh8 23.Qf5 0–0–0 24.c5 b5 25.c6 Kb8 26.cd7 Qd7 27.Qd7 Rd7 28.Red1 g4 29.Nh4 Rhd8 30.Nf5 Bh8 31.d6 h5 32.Rd2 Rc8 33.Rc8 Kc8 34.Rc2 Kd8 35.e4 a5 36.ba5 b4 37.Ne3 Bg7 38.Nf5 Bf8?? 39.Rd2 Kc8 40.Rd5 Kb7 41.Rb5 Kc6 42.Rb4 Kc5 43.Rb3 Kc4 44.Rc3 Kb4 45.Rd3 Ka5 46.Bf6 Kb4 47.e5 Kc4 48.Rd1 Kc3 49.Kf1 Kc2 50.Ke2 Bd6 51.ed6 1–0. Fournier,Frederic (1855) – rihu2009, Active, 2011.

3.e3 d5 A) 4.Nf3 Nf6 (4...e6 5.Bd3 Nd7 6.0–0 Ngf6 7.a3 a5; 4...Nd7 5.c4 Ngf6 6.Nc3 e6 7.a3 a5) 5.c4 e6 6.a3 a5 7.b5 Bd6; B) 4.Bd3 Nf6 (4...Nd7 5.Nf3 Ngf6 6.0–0 e6 7.a3 a5; 4...a5 5.b5 Nf6 6.Nf3 Nbd7 7.Nc3 Nc5; 4...e6 5.Nf3 Nf6 6.a3 Nbd7 7.Nc3 a5; 4...Qd6 5.Nf3 Nd7 6.a3 e5 7.e4 f5) 5.Nf3 Nbd7 6.0–0 e6 7.a3 a5; C) 4.a3 Nf6 (4...e6 5.Nc3 Nd7 6.f4 Ngf6 7.Bd3 a5; 4...Nd7 5.Nf3 Ngf6 6.Bd3 a5 7.b5 Nc5; 4...a5 5.Nc3 Nf6 6.Nf3 Nbd7 7.Be2 e5) 5.Nf3 Nbd7 6.Be2 e6 7.0–0 Bd6; D) 4.c4 Nf6 (4...e6 5.Nf3 Nf6 6.a3 a5 7.b5 Bd6; 4...Be6 5.Ne2 Nf6 6.Nd4 Bc8 7.Qb3 a5; 4...Nd7 5.Nf3 Ngf6 6.Nc3 e6 7.a3 a5; 4...a5 5.b5 cb5 6.cd5 b4 7.a3 Nf6) 5.Nf3 e6 6.a3 a5 7.b5 Bd6.

3.e3 d6 4.c4 f6 5.Nf3 e5 6.Nc3 Bg4 7.h3 Bf3 8.Qf3 Nd7 9.Bd3 Nh6 10.0–0 g5 (10...Nb6 11.e4+–) 11.Qh5 Nf7 12.Bf5 (12.Bh7? Be7–/+) 12...h6 3.Ne4 Qe7 14.d4 0–0–0 (better 14...d5!? 15.cd5 cd5+–) 15.d5 Bg7?? (15...Kb8 16.Bg6 f5 17.dc6 bc6 18.Bf5 Rg8+–) 16.dc6 bc6 17.Qf7!! Qf7 (17...Bf8 18.Qf6 Qf6 19.Nf6+–) 18.Nd6 Kb8 19.Nf7 Nb6 20.Nd8 Rd8 21.Rfd1 Rd1 (21...Rg8 22.c5 Na4 23.Rab1+–) 22.Rd1 Nc4 23.Bc3 Kc7 24.Rd7 Kb6 25.Rg7 Na3 (25...Nd6 26.Bd3+–) 26.Bd3 c5 27.Rf7 cb4 28.Bb4 Nb5 29.Rf6 Kc7 30.Ra6 Nd6 31.Bd6 Kb7 32.a4 e4 (32...g4 33.a5 Kc8 34.Bf5 Kb7 35.Rb6 Ka7 36.Bb8 Ka8 37.Be4) 33.Bb5 h5 34.a5 g4 (34...h4 35.Rb6 Ka7 36.Bb8 Ka8 37.Bc6) 35.Rb6 Kc8 (35...Ka7 36.Bb8 Ka8 37.Bc6) 36.Rb8 1–0. Speedy – Macho, internet, 2017.

3.e3 Nf6 A) 4.Be2 e6 5.Nc3 Bb4 6.a3 Be7 7.f4 0–0; B) 4.a3 a5 (4...d5 5.Nf3 Nbd7 6.Be2 e6 7.Nc3 Bd6) 5.b5 d5 6.Nf3 e6 7.c4 Bd6; C) 4.Nf3 d5 (4...e6 5.a3 d5 6.c4 a5 7.b5 Bd6) 5.c4 e6 6.a3 a5 7.b5 Bd6; D) 4.Nc3 d5 (4...e5 5.Nf3 e4 6.Nd4 Bb4 7.a3 Bc3; 4...e6 5.a3 d5 6.Bd3 Nbd7 7.Nf3 a5) 5.Nf3 Nbd7 6.a4 e5 7.b5 Bc5.

3.e3 h5 4.Bc4 d6 5.Qf3 b6 6.Bg7 Bg7 7.Qf7 Kd7 8.Qg7 Nf6 9.Nf3 Rg8 10.Bg8 (10...Qg8 11.Qg8 Ng8 12.d4+–) 1–0. Wall,Bill – Cybersnake, Microsoft Gaming Zone, 1999.

3.e4 Nf6 4.Nc3 e5= 5.Nf3 Bb4 6.Ne5 d6 7.Nf3 0–0=+ 8.d3 Bg4 9.Be2 Nbd7 10.0–0= Re8 11.a3 Bc5 12.Qd2 Bf3 13.gf3 Nh5 14.f4 Qh4 15.Bh5 Qh5 16.Ne2 Re6 17.f5?? Rh6–+ 18.Kg2 Qh2 19.Kf3 Bf2! 20.Ng1?? Qg3 21.Ke2 Rh2 22.Kd1 Bg1 23.Qf4 Qg2 (24.Qh2 Bh2–+) 0–1. thotares (1650) – rla, internet, 2007.

3.Nf3 b5 4.g3 Bb7 5.Bg2 Nf6 6.0–0 Ng4 (6...e6 7.c3=) 7.e4 Bc8 (7...a5!?+=) 8.a4+/– d6 9.Nc3 Nd7 (9...ba4 10.d4+/–) 10.ab5+– cb5 11.Nb5! Bb7 (11...ab5 12.Ra8 Pinning (12.Ra8 Deflection)) 12.Nc3 Nde5 13.Nd5 Bc6 (13...e6 14.Ne5 Ne5 15.Ne3+–) 14.Re1 f6 (better is 14...e6+–) 15.Nd4 Bd5 (15...Bd7 16.f4 Nc4 17.Bc3+–) 16.ed5 h5 (16...Qb6 17.Bc3+–) 17.Ne6 Qb6 18.Bd4 Qb4 (18...Qb7 19.b5! a5 20.b6+–) 19.f4 (better is 19.Be5 fe5 20.Nc7 Kd7 21.Na8+–) 19...Qd4 (19...Nd7+–) 20.Nd4 h4 (20...Nd7 21.Ne6 Kf7 22.Qe2+–) 21.fe5 h3 22.Qg4 hg2 23.ed6 Rc8 24.d7 (24.Qe6 Rc4 25.Reb1 Rb4 26.Rb4 Rh2 27.Rb8#) 24...Kd8 (24...Kf7 25.dc8Q Rh2 26.Qce6 Ke8 27.Qg6 Kd8 28.Qb6 Kd7 29.Qc6 Kd8 30.Ne6#) 25.dc8Q# 1–0. usingprogram (2015) – zdzislaw07, 2012.

3.Nf3 d5 A) 4.g3 Nf6 (4...e6 5.a3 Nf6 6.e3 a5 7.b5 Bc5; 4...a5 5.b5 cb5 6.e3 b4 7.a3 ba3) 5.Bg2 e6 6.a3 a5 7.b5 cb5; B) 4.e3 Nf6 (4...Nd7 5.c4 Ngf6 6.Nc3 e6 7.c5 a5; 4...e6 5.Bd3 Nd7 6.a3 Ngf6 7.Nc3 a5) 5.Bd3 Nbd7 6.0–0 Qc7 7.c4 a5; C) 4.c4 dc4 (4...Nf6 5.e3 e6 6.a3 a5 7.b5 Nbd7; 4...e6 5.Qb3 a5 6.b5 Nd7 7.Nc3 Ngf6; 4...a5 5.b5 Nf6 6.Nc3 Nbd7 7.e3 e6) 5.Qc2 Nf6 6.Qc4 Nbd7 7.e3 Nb6; D) 4.Bd4 Nf6 (4...a5 5.ba5 Nf6 6.e3 Nbd7 7.Bd3 Qa5) 5.Nc3 Nbd7 6.e3 Qc7 7.Bf6 Nf6.

3.Nf3 e6 A) 4.e3 Nf6 (4...d5 5.c4 Nf6 6.a3 a5 7.b5 Bd6) 5.a3 d5 6.Nc3 Nbd7 7.Bd3 a5; B) 4.Nc3 Nf6 5.e4 Bb4 6.e5 Nd5 7.Be2 0–0; C) 4.e4 Nf6 (4...d5 5.Nc3 Nd7 6.Bd3 Ngf6 7.a3 de4) 5.e5 Nh5 6.a3 d5 7.Nc3 a5.

3.Nf3 Nf6 A) 4.e3 d5 (4...e6 5.a3 d5 6.c4 a5 7.b5 Bd6) 5.Bd3 e6 6.a3 a5 7.b5 Nbd7; B) 4.a3 d5 (4...e6 5.e4 Ne4 6.Bd3 Nf6 7.Nc3 a5; 4...a5 5.Nc3 d5 6.e3 Nbd7 7.Be2 e5) 5.Nc3 Nbd7 6.g3 e5 7.Bg2 Bd6; C) 4.Nc3 d5 5.a3 Nbd7 6.e3 a5 7.Be2 e5; D) 4.e4 Ne4 (4...Qb6 5.Bd3 Qb4 6.Bc3 Qa4 7.Bd4 c5; 4...a5 5.e5 Nd5 6.c4 Nb6 7.ba5 Ra5) 5.Nc3 d5 6.Bd3 Bf5 7.0–0 Nd7.

3.g3 d5 4.Nf3 (4.a3 Nf6=) 4...Nf6 5.a3 Bf5 (5...e6 6.Bg2=) 6.d3 (6.Nh4 Be4 7.f3 Bg6=) 6...Nbd7 (6...e6 7.Nd4=+) 7.Nh4 Bg4 8.h3 Bh5 (8...Be6 9.Bg2=) 9.g4 Bg6 10.Nd2 (10.g5 Nh5+=) 10...e5 11.Bg2 (11.c4 Be7=+) 11...a5 (11...Bd6 12.c4=) 12.Ng6 hg6 13.b5 Bc5 14.e3 Qc7 (14...cb5 15.g5 Nh7 16.Bd5 Ng5 17.Bb7=) 15.c4 cb5 16.cd5 b4 17.Rc1 (17.a4 Rc8=) 17...ba3= 18.Ba3 Qb6 (18...Ba3 19.Rc7) 19.Nc4 Bb4 20.Ke2 Qc7 (20...Qd8 21.Bb4 ab4 22.Nd6 Kf8 23.Qb3+/– (23.Nb7?! Qb6=+)) 21.Bb4 (21.d6 Qd8+/–) 21...ab4 22.Qb3 0–0 (22...b5 23.d6 Qd8 24.Nb2+/–) 23.d6 (23.Qb4 g5+/–) 23...Qc5 24.g5 (24.Bb7 Ra7 25.Bg2 Ne8+/–) 24...Ne8+= 25.Bb7 Rb8 26.Nd2 (26.Be4!?+=) 26...Qd6= 27.Ne4 Qe7 28.Bd5 Nb6 29.Bc6 Nc7 30.Rc5 Na6 31.Rb5 (31.Ra5 Rfc8=) 31...Qc7 (31...Rfc8!? 32.Rc1 Rc7=) 32.Rc1+= Nd7 (32...Nc8 33.Rd5+=) 33.Qb2 (33.Rd5 Rfd8+=) 33...Rb5 (33...Qa7 34.Rd5 Rfd8 35.Ra1+/–) 34.Bb5 (34...Qb7 35.Ba6 Qa6 36.Qb4+/–) 1–0. Laurent,C – Dehaybe,A, corr Belgium Mkl, 1994.

3.h4 d5 4.Qc1 h6 5.Nf3 Bg4 6.Nh2 Bf5 7.g4 Be4 8.f3 Bh7 9.d3 Nd7 10.g5 hg5 11.Qg5 e6 12.Qd8 Rd8 13.Nd2 Ngf6 (13...Bb4? 14.Bg7 Bd3 15.Bh8 (15.cd3?! Rh4 16.Bb2 Ngf6=; 15.ed3?! Rh4 16.Bb2 Ngf6=) 15...Bc2 16.Ng4+–) 14.a3 Bd6 15.Ng4 Ng4 16.fg4 Be5 17.d4 (17.0–0–0!?=+) 17...Bg3 18.Kd1 Nf6 19.Rh3 White intends h5 19...Bd6 20.g5 Ne4 (better 20...Ng4!? 21.Rb3 Bf5–+) 21.Ne4=+ Be4 22.h5 Ke7 23.Bc1 f6 24.gf6 gf6 25.e3 (25.Be3!?=+) 25...Rh7 26.Bd3 Bd3 27.cd3 Rdh8 28.e4 Rh5 29.Rf3 (29.Rh5 Rh5 30.Ke2 Rh1–+) 29...Rh3 30.Rh3 Rh3 31.Kc2 Rh1 32.e5 (32.Bb2 Ra1 33.Ba1 Bf4–+) 32...Rh2 33.Kc3 fe5 34.Bg5 Kd7 35.de5? (35.Rf1–+) 35...Be5 36.d4 Rh3 37.Kc2 Bd4 38.Rf1 Ra3 39.Rf7 Kd6 40.b5 (40.Rb7 e5 41.Be7 Ke6 42.Rc7–+) 40...ab5 (better 40...Ra2 41.Kd3 e5 42.Rb7 c5 43.Be7 Ke6 44.Bc5 Bc5 45.ba6 e4 46.Kc3 Ra6–+) 41.Be7 Ke5 42.Ba3 c5 43.Rb7 b4 44.Bc1 Ke4 45.Re7? (better 45.Bh6!?=+) 45...e5–+ 46.Kb3 (better 46.Bd2–+) 46...Kd3 Black prepares e4 (46...Bc3 47.Kc2–+) 47.Bg5?? (47.Rd7 e4 48.Rd5 e3=) 47...e4?? (better 47...Bc3 48.Rh7 c4 49.Ka2 e4 50.Rh3 Ke2 51.Rh2 Ke1 52.Rh1 Kf2 53.Rh2 Kg3–+) 48.Rd7–/+ e3 49.Rd5 e2 50.Bh4 Ke4 (50...Kd2!?=+) 51.Rd8 Bc3 52.Re8 Kf3 53.Rf8 (53.Kc4 Kg4=) 53...Ke4 (53...Kg4!? 54.Bf2 e1Q 55.Be1 Be1=) 54.Re8 Kd3 55.Rd8 Ke4 56.Re8 Kf3 57.Rf8 Ke4 (better 57...Kg4!? 58.Bf2 e1Q 59.Be1 Be1=) 58.Re8 ½–½. beatmeeasy (1975) – ggius2021 (1945), lichess.org, 2021.

3.c4 d5

4.e3 e6 5.Nf3 f6 6.a3 Bd6 7.d4 Ne7 8.Nbd2 b5 9.cd5 cd5 10.Bd3 Bd7 11.Nb3 0–0 12.Qc2 f5 13.Nc5 Bc8 14.0–0 Ng6 15.a4 Bc5 16.dc5 ba4 17.Ra4 Nc6 18.b5+– Nb8 19.Nd4 Bb7?? 20.Ne6 Qe7 21.Nf8 Nf8 22.Rfa1 g6 23.Qc3 Kf7 24.c6 Bc8 25.Qh8 Ke8 26.e4 de4 27.Ba3 ed3 28.Be7 Ke7 29.Qg7 Ke8 30.Re1 Be6 31.c7 Nbd7 32.Ra6 (32...Rd8 33.Rae6 Ne6 34.Re6#) 1–0. pierre (2145) – rla, internet, 2007.

4.e3 Bf5 5.cd5 cd5 6.Qb3 e6 7.a4 Nc6 8.b5 Nb4 9.d3 Rc8 10.Nf3? (Better is 10.Na3–/+) 10...Nc2–+ 11.Kd1 Na1 12.Ba1 Nf6 13.h3 Nd7 14.Bd4 Nc5 15.Bc5 Rc5 16.Nbd2 Be7 17.g4 Bg6 18.h4 h5 19.g5 Bd6 20.Qb2 Qa5 21.ba6 Qa4 22.Ke2 Qa6 23.Qb3 (23.Ke1 Qb5 24.Qa1 Bd3–+) 23...0–0 24.Ne1 Rfc8 25.f4 Rb5 26.Qd1 Rb2 27.Kf3 (27.Nef3 Qd3 28.Kf2 Qc3–+) 27...Qa2 28.Rh2 Bb4 (29.Kg3 Bd2–+) 0–1. hal1958 – FlinstoneNL, HCL–A1335 playchess.de, 2003.

3.e3 a5

4.ba5 Qa5 (4...Nf6 5.Nf3 Na6 6.Be2 Qa5 7.Nc3 b5; 4...Ra5 5.Nf3 Nf6 6.Be2 Na6 7.Nc3 e6; 4...Na6 5.Nc3 Qa5 6.Nf3 Nf6 7.Be2 b5; 4...d6 5.Nf3 Nf6 6.Nc3 Qa5 7.Be2 Na6) 5.Nc3 Qd8 (5...Nf6 6.Nf3 Na6 7.Be2 b5) 6.Nf3 (6.f4 Nf6 7.Nf3 Na6) 6...e6 (6...Nf6 7.d4 g6) 7.a3 (7.g3 Nf6) 7...Nf6 8.Be2 (8.a4 d5=) 8...d5 9.h3 (9.0–0 Bd6=) 9...Na6 10.0–0 Bd6 11.Qc1 (11.Re1 e5+=) 11...b5 (11...e5 12.Nd1 e4 13.Nd4+=) 12.Nd1 0–0 13.Ne5 (13.a4 b4=) 13...Be5 (13...Nb8 14.d4+=) 14.Be5= Bb7 (14...Nd7 15.Bd6 Re8 16.Qb2=) 15.f4 (15.a4 ba4 16.Ra4 c5+=) 15...Nc5 16.d4 (16.d3 Ncd7=) 16...Nce4+= 17.Bd3 Qa5 (17...Ng3 18.Bf6 Qf6 19.Rf3+=) 18.c3 (18.Nf2 Ng3 19.Rd1 Nfe4 20.Ne4 Ne4 21.Be4 de4=) 18...Ng3 (18...Ne8 19.Be4 de4 20.f5 ef5 21.Rf5=) 19.Rf2 (19.Bf6 gf6 20.Rf3 Ne4=) 19...Nge4 (19...Nfe4 20.Rf3–/+) 20.Rf3 (20.Rfa2 Nd7=) 20...Rac8 (20...Ne8 21.f5 f6 22.Bh2+=) 21.f5 (21.a4 Ra8 22.Nb2 Nc3 23.Bf6 gf6=) 21...ef5 (21...Nd7 22.Bh2+=) 22.Rf5= g6?? (better is 22...Ra8=) 23.Rf6+– Nf6 24.Bf6 Rce8 (24...Qb6+–) 25.e4! Re6 (25...de4 26.Qh6 Mate attack) 26.e5 Qa4 (26...Rf6 27.ef6 Qd8+–) 27.Qh6 Rf6 28.ef6 Bc8 (28...Qd1 29.Rd1 Re8 30.Qg7) 29.Qg7 1–0. lican – leoooo, playok.com, 2012.

4.b5 Nf6 (4...d6 5.Nf3 Nf6 6.Nc3 Nbd7 7.Be2 Nc5; 4...a4 5.Nf3 Nf6 6.Na3 d5 7.Be2 e6; 4...d5 5.Nf3 Nf6 6.Nc3 g6 7.Bd3 Bg7) 5.Nc3 d6 6.Nf3 Nbd7 7.Rb1 Nc5.

3.e3 e6

4.a3 d6=.

4.Nc3 d5 5.Bd3 Nd7 6.Nf3 Ngf6 7.a3 a5.

4.Nc3 Nf6 5.a3 d5 6.Nf3 Nbd7 7.h3 e5.

4.Bd3 d5 5.Nf3 Nd7 6.a3 Ngf6 7.0–0 a5.

4.Bd3 Nf6 5.Nc3 Bb4 6.a3 Be7 7.Nf3 d5.

4.Nf3 d5 5.a3 Nf6 6.c4 a5 7.b5 Bd6.

4.Nf3 Nf6 5.a3 d5 6.Nc3 Nbd7 7.Be2 Bd6.

4.Nf3 Nf6 5.a3 g6 6.Be2 Bg7 7.c4 0–0 8.0–0 d5 9.d4 b5 10.cd5 cd5 11.a4 ba4 12.Qa4 Qb6 13.Rc1 Bb7 14.Ne5 Ne4 15.Nc3 Rc8?? (better 15...Nc3 16.Bc3 Be5 17.de5 Nc6+=) 16.Ne4+– Rc1 (16...Nc6 17.Nc5 Ne5 18.de5+–) 17.Rc1 (17.Bc1?! Be5 18.Qe8 Kg7+–) 17...de4 (17...Nc6 18.Nd6 a5 19.Nc6 Bc6 20.Rc6 Qb4+–) 18.Qe8 Bf8 19.Qf7 Kh8 20.Qf8 1–0. Pierre – Mannaher, internet, 2020.

4.Nf3 h6 5.a3 (5.Be2 Nf6+=) 5...d5 6.c4 (6.Be2 Nf6+=) 6...Nf6 7.Nc3 Be7 (7...a5 8.b5+=) 8.d4 0–0 9.c5 (9.Be2 dc4 10.Bc4 a5+=) 9...Qc7 (9...a5 10.Bd3+=) 10.Bd3 Nbd7 11.Qc2 e5 (11...a5 12.b5+=) 12.de5+/– Ne5 (12...Ng4 13.Na4 Nge5 14.Ne5 Ne5 15.Bh7 Kh8 16.Nb6+=) 13.Ne5 Qe5 14.Na4 (14.Ne4 Qe6 15.Ng3 Qg4+/–) 14...Qg5+= 15.Nb6 Rb8 16.f4 (16.Nc8!? Rfc8 17.0–0+=) 16...Qh4= 17.g3 (17.Qf2 Ng4 18.Qh4 Bh4 19.Kd2 g6=) 17...Qh3 (17...Qh5 18.Nc8 Rbc8 19.0–0=) 18.Be5 (18.Nc8!? Qc8 19.Bf5+=) 18...Bg4= 19.Bb8 Rb8 20.Bf1 Qh5 21.Bg2 (21.Bd3 Qh3=) 21...Bf5=+ 22.Qd2 (22.Qd1 Qg6=+) 22...Ne4 23.0–0?? (better is 23.Be4 Be4 24.0–0=+) 23...Nd2–+ 24.Rf2 Ne4 25.Rff1 Bf6 26.Rad1 Nc3 27.Rd2 Re8 28.Re1 Ne4 29.Rdd1 Bc3 30.Rf1 Bb2 31.a4 Nc3 32.Rd2 Ba3 33.b5 ab5 34.ab5 Nb5 35.Nd5 cd5 36.Rd5 Re3 37.Rd8 Kh7 38.Bb7 Bc5 39.Kh1 Qe2 40.Bg2 Be4 41.Be4 Re4 42.Rdd1 Nc3 43.Rc1 Re3 (44.Rce1 Qd3 45.Kg2 Re2 46.Re2 Qe2 47.Rf2 Qf2 48.Kh3 f5 49.g4 Qf3 50.Kh4 Qg4; 43...Re5 44.Rce1 Qd3 45.Kg2 Re2 46.Re2 Qe2 47.Rf2 Qf2 48.Kh3 f5 49.g4 Qf3 50.Kh4 Qg4) 0–1. Fredek (2090) – Torcoz, Freundschaftspartie, 5m + 0s, 2005.

2.Bb2 Na6

3.a3 Qb6 4.c4 (4.e4 Nf6 5.Ba6 Qa6 6.Bf6 ef6=) 4...Nf6 5.e3 (better is 5.c5 Qc7 6.Bf6 ef6 7.e3=) 5...e6? (5...c5 6.b5=) 6.Nf3 (6.Bf6!? gf6 7.c5+/–) 6...c5 (6...d6 7.Bf6 gf6 8.d4+=) 7.b5 Nc7 (7...Be7 8.Be5 d6 9.ba6 de5 10.ab7 Bb7 11.Ne5=) 8.a4 (8.Bf6 gf6 9.Nc3 d5+=) 8...a5 (8...d5 9.a5 Qd6 10.Be5+=) 9.Be2 (9.Bf6 gf6 10.Be2 d5+=) 9...d5 10.d3 Qd6 (10...Bd6 11.Bf6 gf6 12.0–0=) 11.Nbd2 (11.Be5 Qb6+/–) 11...dc4 (11...Be7 12.Be5 Qb6 13.cd5 ed5 14.0–0+=) 12.dc4 (12.Nc4 Qd7+/–) 12...b6+= 13.Qc2 Bb7 14.Rd1 (14.Bf6 gf6 15.Ne4 Be4 16.Qe4 0–0–0+=) 14...Qe7+= 15.Nb3 Rd8 16.0–0 Rd1 (16...Be4 17.Qc3+=) 17.Rd1+/– Ne4 18.Ne5 (18.Be5 f6 19.Bb2 e5+=) 18...Qf6 (18...Qh4 19.Bf3 f5 20.Rd7+–) 19.Bf3 Qf5?? (19...Qh4 20.g3 Qg5 21.Be4+–) 20.Nf7!! Kf7 21.Rd7+– Be7 22.Rc7 Rb8 23.Rb7! (23...Rd8 24.Be4+–) 1–0. Sternik,Ryszard – Chmurczyk, corr, 1995.

3.a3 e6 4.Nf3 b5 5.e4 d5 6.Bd3 (6.Ne5 Bb7+=) 6...de4 (6...Nc7 7.ed5 Nd5 8.0–0+=) 7.Be4 Qd6 (better is 7...Nb8!?+=) 8.Be5 Qd7 9.0–0 (9.Ng5!? Nc7 10.Nh7+–) 9...Nf6 10.Nc3 (10.Bf6 gf6 11.c3 Nb8+=) 10...Nc7 (10...Ne4 11.Ne4 Bb7 12.Re1+/–) 11.Nd4 (11.Qe2!?+/–) 11...Ne4= 12.Ne4 Qd5 13.Bc7 Qe4 14.c3 (14.Nf3 c5=) 14...Bb7 (14...Qd5 15.Qe2=) 15.f3 (15.Re1 Qd5=) 15...Qd5 (15...Qd3 16.Re1=) 16.Qe2 Ba6 (16...a6 17.Bb6=) 17.Rfe1 (17.Be5 f6 18.Bg3 Bc8+=) 17...Bd6 (better is 17...c5!? 18.Nc2 c4=) 18.Bd6+/– Qd6 19.g3 (19.Qe4!?+/–) 19...0–0 (19...Bb7 20.Nb3+=) 20.f4 (20.Qe5 Qe5 21.Re5 Rfd8+=) 20...Rfe8 (20...Bb7 21.Nb3+=) 21.Qe3 (21.a4 Red8+=) 21...Rad8 22.g4 Bb7 23.a4 a6 24.g5 c5 25.Nb3?? Qd5–+ 26.Nc1 Qg2 0–1. Matthias – Whiskey40, mySchach.de, 2005.

3.a3 Nf6 4.Bf6 ef6 5.e3=.

3.a3 Nc7

4.c4 d5 5.e3 Nf6 6.Nf3 Bg4 7.Be2 e6 8.0–0 Be7 9.d4 0–0 10.Nbd2 a5 11.Qb3 Ne4 12.Rfd1 a4 13.Qc2 White intends c5 13...Nd2 14.Qd2 (14.Nd2?? Be2 15.Re1 Bh5–+; 14.Rd2?! Bf5 15.Bd3 Bd3 16.Qd3 b5 17.cb5 cb5= (worse 17...Nb5 18.Rc1+–)) 14...Ne8 15.Rac1 Nd6 16.c5 Ne4 17.Qe1 Qb8 18.Ne5 Be2 19.Qe2 Qc7 20.b5 h6 21.b6 Qd8 22.f3 Nf6 23.Nd3 Nd7 24.Nb4 Bf6 25.e4 de4 (25...Re8 26.Rf1=) 26.fe4+– g6 27.Nd3 White prepares the advance e5 27...Bg7 28.e5 Ra5 29.Nf2 f5 30.Bc3 Rb5 31.Bb4 (31.Qc4 Re8+–) 31...Nb8 (31...Qe7 32.Nd3+–) 32.Qc2 Na6 33.Qa4 Qd5 34.Bc3 f4 (34...Qb3!? 35.Qb3 Rb3+–) 35.Qc2+– Kh7 36.Qe4 (36.Rf1 f3 37.Nd3 Rf5+–) 36...Nb8 37.Bb4 Rf5 38.Rb1 Qa2? (better 38...Na6+–) 39.Rd2 (39.Qf3 Na6 40.Ne4 Nb4 41.ab4 Qd5+–) 39...Qc4 40.Rc2 Qd5 41.a4 Rb4 42.Rb4 Qd7 (42...Bf8 43.Rc3+–) 43.a5 Na6 44.Rb1 (44.Rb3 f3 45.Rf3 Rf3 46.gf3 Qf7+–) 44...Qf7 (44...f3 45.gf3 Kh8 46.Qe3+–) 45.Rc3 Kg8 46.Rf3 h5 47.h4 Bf8 48.Nh3 Bh6 49.Rbf1 (49.Qe2 Nb8+–) 49...Qe7 Black gets the initiative 50.Nf4 Qh4 51.g3 Qg4 52.Kg2 (better 52.Qe3 Nb4 53.a6 Na6 54.Qb3+–) 52...g5+= Black plans h4 53.Qc2 (better 53.Kf2!?+=) 53...gf4=+ 54.Qb3 Kf7 55.Qd1? (better 55.Rh1!?=+) 55...h4–+ 56.Rd3 (better 56.Qe2–+) 56...Qg6 (56...Qd1 57.Rdd1 fg3 58.Rf5 ef5 59.d5 cd5 60.Rd5–+) 57.Rff3? (better 57.g4 Ke8 58.Kh1–/+) 57...hg3–+ 58.Qh1?? (58.Kg1–+) 58...Rh5 59.Qh3 (59.Qe1 Rh2 60.Kg1–+) 59...Rh3 60.Kh3 Qh5 61.Kg2 Qh2 62.Kf1 g2 63.Ke2 (63.Ke1 g1Q 64.Rf1 Qhf2 65.Kd1 Qgf1) 63...g1Q 64.Rf2 Qhf2 0–1. BeepBeepImAJeep – Sciencer (2320), lichess.org, 2018.

4.e3 f6 5.Nf3 Nh6 6.h3 Nf7 7.g4 (7.d4!?+=) 7...e5=+ 8.c3 d5 9.d3 Bd6 10.Qc2 Be6 11.Rg1 g5 12.c4 Rc8 13.c5 Be7 14.Qb3 (14.Be2 Qd7=) 14...h5=+ 15.Qa4 a6 16.Qd1 hg4 17.hg4 Qd7 18.Nfd2 Rh4 19.Be2 Nh6 g4 seems the pivot of the position (19...Rb8 20.Nc3=+) 20.f3= Kf7 21.Nc3 Rh8 22.Qc2 d4 23.ed4 Qd4 24.0–0–0 Qe3 (24...a5 25.Nc4 ab4 26.Ne4=+) 25.Kb1 Rh2 (25...Ke8 26.Nc4 Qf4 27.d4=) 26.Nde4 (26.Nc4!? Bc4 27.dc4=) 26...Nd5 27.Bc1 Qd4 28.Nd5 cd5 29.Nd6 (29.Bb2 Qe3 30.Ng3 a5=+) 29...Bd6–/+ 30.cd6 Rc8 31.Qd2 Qf2 32.Rde1 Bd7 (better 32...d4!?–/+) 33.Rgf1 Qb6 34.Rh1 (34.d4 Qd4 35.Qd4 ed4 36.Ba6 ba6 37.Re7 Kg6 38.Rd7 d3=) 34...Rh1=+ 35.Rh1 Kg7 36.Bb2 (36.d4 e4 37.fe4 de4 38.d5=+) 36...a5 (36...d4 37.Bd1–/+) 37.Bd1 (better 37.Be5!? Nf7 38.Bb2=) 37...ab4 38.Rh6? (better 38.Qb4 Qb4 39.ab4–+) 38...Kh6–+ 39.Qh2 (39.Qb4 Qa6 40.Qb3–+) 39...Kg7 40.ab4 Qb4 0–1. beatmeeasy (2000) – hubisa3 (2100), lichess.org, 2021.

4.Nf3 e6 5.e4 d5 6.Nc3 g6? (6...a5 7.ed5 ab4 8.ab4 Ra1 9.Ba1 ed5 10.b5=) 7.d4 (better is 7.Nd5!? f6 8.Nc7 Qc7 9.e5+–) 7...Bg7 8.e5 Ne7 9.Bd3 f6 10.Qe2 f5 11.h4 Ng8 12.Bc1 Nh6 13.Bg5 Qd7 14.h5 Qf7 15.hg6 Qg6 16.Qe3 Ng4 17.Qf4 Bd7 18.Ke2 Nb5 19.Nb5 cb5 20.Qg4 fg4 21.Bg6 Kf8?? (better is 21...hg6 22.Rh8 Bh8+–) 22.Rh7 Rh7 23.Bh7 gf3 24.Kf3 a5 25.Bd2 ab4 26.Bb4 Kf7 27.g3 Rh8 28.Bd3 Bh6 29.Rh1 Kg7 30.Kg2 Be8 31.Be7 Kf7 (31...Kg8+–) 32.Bf6 Rg8 33.Rh6 Kf8 34.Rh7 Bf7 35.Bb5 Rg4 36.f4 Bg8 (36...Rg6+–) 37.Be7 1–0. hertford – prossett, ChessWorld.net, 2002.

3.a3 d5

4.e3 Nc7 +=.

4.e3 g6?? 5.Bh8+– f6 (5...Nc7 6.Be2+–) 6.Qf3 (6.Nf3 Nh6 7.Ba6 ba6+–) 6...Bf5 (6...Nh6 7.e4 Nf7 8.Ba6 ba6 9.Nc3+–) 7.d3 (7.d4 Nh6 8.b5 Qa5 9.c3 Nc7+–) 7...Qd7 (7...Nh6 8.b5 cb5 9.d4+–) 8.Be2 (8.Nd2 e5+–) 8...0–0–0 (8...Nh6 9.b5 cb5 10.e4 de4 11.de4+–) 9.g4 (9.c4 dc4 10.d4 b5+–) 9...Be6 10.h4 (10.d4 Nc7 11.b5 Nb5 12.Bb5 cb5+–) 10...c5 (10...Nh6 11.c4+–) 11.c3 cb4 12.ab4 Kb8 13.d4 Qd6 14.Nh3 f5 15.Be5 fg4 16.Bd6 Rd6 17.Qf8 Kc7 18.Ng5 Rd8 19.Ne6 (19...Kd6 20.Qd8 Ke6 21.Qg8 Kd7 22.Bg4 Kc7 23.Qc8 Kb6 24.Qe6 Kc7 25.Qe7 Kc6 26.Qd7 Kb6 27.Qd6 Kb5 28.Be2) 1–0. 1805DYDIDIDY – Whiskey40, mySchach.de, 2005.

4.Nf3 f6 5.d4 Bf5 (5...Nc7 6.e3=) 6.e3 Be4 (6...e6 7.Nh4+=) 7.c4 (7.Nbd2 Bf3 8.Qf3 b5+–) 7...Nc7 8.cd5 Nd5 9.Nbd2 Bf5? (better 9...Bf3 10.Qf3 e6+–) 10.e4+– Qd7 (10...Be6 11.ed5 Bd5 12.Bd3+–) 11.ef5 (11.ed5 cd5 12.Rc1 e6+–) 11...Qf5 12.Be2 (12.b5 Qe6 13.Qe2 Qe2 14.Be2 Nf4+–) 12...Qe6 (12...Nf4 13.0–0+–) 13.0–0 Nh6 (13...Qd7 14.Re1+–) 14.b5 Ne3 (14...Rd8+–) 15.fe3 Qe3 (15...Ng4 16.Qe1+–) 16.Kh1 Ng4 (16...Rd8 17.bc6 bc6 18.Bc4+–) 17.bc6 bc6 18.Qa4 (better 18.Qc2 Rc8 19.Rae1+–) 18...Kf7 (18...Rc8 19.Rae1 Qh6 20.Nc4+–) 19.Qc4 (better 19.Rae1 Nf2 20.Rf2 Qf2 21.Qc6 Qe1 22.Ne1 Rd8 23.Bc4 Kg6+–) 19...e6 20.Ne4! Rb8 (20...Qe4 21.Ng5 Double attack (21.Ng5 Decoy)) 21.Nfg5 Kg6 22.Qe6 Qe2 23.Qf5 Kh5 24.Ng3 (24.Ng3 Kh4 25.Nf3 Qf3 26.Qh5; 24.Nf7 Kh4 25.g3 Kh3 26.Qh5) 1–0. michaelbuss (2780) – Picton, ChessWorld.net, 2011.

4.Nf3 Nf6 5.e3 Bg4 6.Ba6 ba6 7.h3 Bf3 8.Qf3 e6 9.Bf6 gf6 (9...Qf6 10.Qf6 gf6 11.d4+=) 10.Nc3 (10.Qe2 a5=) 10...c5 (10...a5!?=) 11.bc5 Bc5 12.Qg4 Qa5 13.Qg7 Ke7 14.g3 (better is 14.Qh6!?+/–) 14...Rag8 15.Qh6 Rg6 16.Qh5 Rg5 17.Qh4 Ke8 18.Rb1 Bd6 19.Rb7 Qa3 20.Qd4 Be5?? (20...Rg6 21.Qa7 Kf8 22.Rf7 Kg8+–) 21.Qa7 Qa5 (21...Qd6 22.f4 Qd8+–) 22.Re7 Kf8 23.Rf7 Kg8 24.Qd7 Qb5 25.Nb5 Bd6 26.Qe8 (26...Bf8 27.Qf8) 1–0. Trkn – guest1119, ICC, 2004.

2.Bb2 b5

3.a3 a6 4.e3 d5 5.d4 (5.a4 ba4 6.Ra4 Bd7+=) 5...Nf6 6.Nd2 e6 7.Ngf3 h6 8.Bd3 Be7 9.0–0 0–0 10.Ne5 Bd6 11.Ndf3 (11.Nb3 Qc7+=) 11...Be5 (better is 11...a5!?=) 12.Ne5 Bd7 (12...a5 13.Qd2+/–) 13.c3 a5 14.a4 ba4 (14...ab4 15.cb4 Qe7 16.Bc3+/–) 15.Ra4 c5 16.Ra5 (better is 16.Nd7!? Nbd7 17.bc5+–) 16...Ra5+= 17.ba5 c4 18.Bc2 (18...Qa5 19.Qa1 Qa1 20.Ra1+=). guinguin – LuckyMiki, internet, 2007.

3.a3 d6 4.e3 d5 5.c4 (5.a4 ba4 6.Ra4+=) 5...e6 (better 5...dc4 6.d3 cd3 7.Bd3 a5=+) 6.cb5+– cb5 7.Bb5 Nc6?? (7...Bd7 8.Bd3+–) 8.Be2 (better 8.Bc6 Bd7 9.Ba8 Qa8 10.Nf3+–) 8...Qc7 (8...Nf6 9.Nf3+–) 9.Nf3 Bb7 10.0–0 0–0–0? (10...Nf6+–) 11.d4 (11.b5!? Nb8 12.Qa4 Nd7+–) 11...Kb8 12.Nbd2 Be7 (12...Rc8 13.Rc1 Qb6 14.b5+–) 13.Rc1 Bd6 (13...Qb6+–) 14.b5 Bh2 (14...Nge7+–) 15.Nh2 Qd6 16.bc6 Bc6 17.Nhf3 Bb7 18.Nb3 Nf6 19.Nc5 Ne4 20.a4 (better 20.Ne5!? Nc5 21.Nf7 Qb6 22.dc5 Qb2+–) 20...Ka8 21.Ba3 Bc8 (21...Rc8 22.Ne5 Qe7 23.a5+–) 22.Ne4 (better 22.Ne5 Ng5 23.Bb5+–) 22...de4 (22...Qa3 23.Nc5 Qb4+–) 23.Bd6 ef3 24.Bf3 (24.Bf3 Bb7 25.Bb7 Kb7 26.Qf3 Ka6 27.Qc6 Ka5 28.Qb5; 24.Rc8 Kb7 25.Rc7 Ka8 26.Bf3 Kb8 27.Qb3) 1–0. BeepBeepImAJeep (2595) – Aichistar (1655), lichess.org, 2017.

3.a4 d5 4.ab5 cb5 (4...Qd6 5.Nc3+–) 5.e3 Qd7 (5...Bd7 6.Nc3+–) 6.Nc3 (6.Ra5 Nc6 7.Bb5 Qb7+–) 6...a6 (6...Qb7!? 7.Bb5 Bd7+–) 7.Bb5!+– ab5? (better 7...Nc6 8.Nf3 Bb7+–) 8.Ra8 Nc6 (8...Qb7 9.Nb5! Nh6+–) 9.Nd5! Qd5 (9...Nd8 10.Nb6 Qc6 11.Rc8 Qb6 12.Qe2+–) 10.Rc8 Nd8 11.Qe2 e6 (11...Nf6 12.Bf6 ef6 13.Rb8 Bb4 14.Qb5 Qb5 15.Rb5+–) 12.Rb8 Bd6 (12...Ne7 13.e4 Qc4 14.Qc4 bc4 15.Ra8+–) 13.Qb5 Ke7 (13...Qb5 14.Rb5 f6+–) 14.Qd5 ed5 1–0. DEFFM – GuestZSDL, freechess.org, 2018.

3.a4 d6 4.ab5 Bd7 5.Nc3 (5.e3 Qb6 6.Nc3 e5+–) 5...cb5 6.e3 e5 (6...Nc6 7.Bb5 Nb4 8.Nf3+=) 7.Nb5 (7.Qf3 Nc6 8.Bb5+–) 7...Bb5 (better 7...Nc6!?+–) 8.Bb5+– Nd7 9.Qf3 Ngf6 10.Nh3 Be7 11.g4 (better 11.Bc6 Rc8 12.b5+–) 11...0–0? (better 11...Rb8 12.c4 Qc7+–) 12.g5+– e4 13.Qf5 g6 (13...Qc8 14.gf6 Nf6 15.Qc8 Rfc8 16.Kd1+–) 14.gf6 Bf6 (14...gf5?? 15.Rg1 Kh8 16.fe7 Ne5 17.ed8Q Rfd8 18.Ng5+–) 15.Bf6 (15.Qd7!? Bb2 16.Ra2 Qf6+–) 15...Nf6 (15...gf5?? 16.Rg1) 16.Qg5 (16.Rg1 Kh8 17.Qg5 Kg7+–) 16...Kg7 (16...Rb8 17.c4 d5 18.Ra7 dc4 19.Nf4+– (19.Bc4 Rb4 20.Be2 Rb1 21.Bd1 Qd3=)) 17.Rg1 (17.Bc6!? Rb8 18.b5 h6+–) 17...h6 (17...Qc8 18.Nf4 Qc2 19.Ke2+–) 18.Qh4 (better 18.Qf5 Qc8 19.Qc8 Rfc8 20.c3+–) 18...Nd5 (18...Qb6 19.Ra5 a6+–) 19.Qe4 Nf6 20.Qd4 Qe7 (20...Qb6 21.Nf4 Qd4 22.ed4+–) 21.Nf4 (21.Bc6 Qe5 22.Qe5 de5 23.Ba8 Ra8+–) 21...Qe5 (21...Kh7 22.Bc6+–) 22.Qe5 (22.Bc6 Qd4 23.ed4 Rae8 24.Be8 Re8 25.Kd1 Re7+–) 22...de5 23.Nd3 e4 24.Nc5 Rab8 (24...Rfc8 25.Ra5+–) 25.c4 a6 26.Ra6 Nh5 (26...Nd5 27.Ra4 Nb6 28.Ra5 Nc4 29.Bc4 Rb4 30.Ba2+–) 27.Ra7 (27.Ne4 Ra8+–) 27...Rfe8 (27...Ra8 28.Ra8 Ra8 29.Ke2+–) 28.Be8 Re8 29.b5 Re5 30.Nb3 (30.d4 ed3 31.Nd3 Re8+–) 30...Re6 (30...Nf6 31.b6 Re8 32.Nc5+–) 31.b6! Nf6 (31...Rb6 32.Ra3 Combination) 32.c5 Rc6 33.b7 (better 33.Rc7 Re6 34.b7+–) 33...Nd5 34.b8Q Nc3 35.Qe5 (35.Qe8 Rc7 36.Rc7 g5 37.Qf7 Kh8 38.Qf8) 35...Kg8 (35...Rf6 36.dc3 h5 37.Ra6 Kf8 38.Qf6 Ke8 39.Ra8 Kd7 40.Qd6) 36.Qc3 (36.Qe8 Kg7 37.Rf7) 36...Re6 (36...Ra6 37.Rg6! Rg6 38.Ra8 Kh7 39.Qh8) 37.Ra8 Kh7 (37...Re8 38.Re8 Kh7 39.Rh8) 38.Qh8 1–0. FeegLood (2655) – geebag (1735), lichess.org, 2015.

3.Nc3 e6 4.a3 d5 5.d4 (5.e4 a5=) 5...Nf6 6.Nf3 Bd6 7.Qc1 h5 (7...0–0 8.e3–/+) 8.h4 (8.Na2 a5=+) 8...Ng4 (8...a5 9.Na2–/+) 9.Qg5 (9.e4 a5=+) 9...g6 (9...Be7 10.Qd2=+ (10.Qg7?? Bf6 11.Qh8 Bh8–+)) 10.g3 (10.Qd8!? Kd8 11.e4+=) 10...Be7 11.Bg2?? (better 11.Qd2=+) 11...Bg5–+ 12.0–0 (12.hg5 a5 13.Na2–+) 12...Be7 13.a4 Bb4 14.ab5 Bc3 15.Bc3 cb5 16.Bb4 Nc6 17.Bc5 a6 18.Nh2 (18.Rfb1 Na5–+) 18...Nh2 19.Kh2 f5 (better 19...g5 20.e4 gh4 21.Rfe1 hg3 22.fg3–+) 20.f3 (20.f4 Qc7–+) 20...a5 (20...g5 21.hg5 Qg5 22.f4–+) 21.c3 (21.f4 b4–+) 21...a4 (21...g5 22.hg5 Qg5 23.f4–+) 22.Ra3 (22.f4 Na5 23.Rfb1 Nb3–+) 22...Ba6 (better 22...g5 23.hg5 Qg5 24.f4–+) 23.f4 Na5 24.e3 (24.Ra2 Nc4–+) 24...Nc4 (24...b4!? 25.cb4 Bf1 26.Bf1–+) 25.Raa1 Ne3 26.Rf2 Ng4 27.Kg1 Nf2 28.Kf2 Bb7 29.Rb1 Bc6 30.Bf1 Kf7 31.Bd3 Ra6 32.Bc2 Qa8 33.Ra1 Re8 (33...Rc8 34.Bd3–+) 34.Bd6 Rd8 35.Be5 Qb7 36.Bd3 Qb6 37.Ke3 Qa5 38.Ra3 Ra7 39.Kd2 b4 40.cb4 Qb4 41.Ke3 Qa3 (41...Qa3 42.Bd6 Rd6 43.g4 Bb5 44.Kf3 Qd3 45.Kg2 Qe2 46.Kh1 Rc7 47.gh5 Rc1) 0–1. WarlpiriMan – Paul Joseph, ChessWorld.net, 2015.

3.e3 Ba6 4.a4+= Qc7 (4...e6 5.Nf3+=) 5.ab5+– Bb5 6.c4 Ba6 7.Nf3 d5 8.b5 Bb5?? (better 8...cb5 9.cd5 Qb7+–) 9.cb5+– cb5 (9...Qb7+–) 10.Bb5 Kd8 11.0–0 1–0. GuestBMBQ – GuestYSKX, freechess.org, 2017.

3.e3 d5 (--> 1.b4 c6 2.Bb2 d5 3.e3 b5).

3.e3 f6 4.Qh5 g6 5.Qd1 e5 6.Nf3 (6.a4 Bb4 7.ab5 cb5=) 6...g5 (6...Bb4!? 7.a4 ba4 8.Ra4 Be7=+) 7.c4 (7.Ne5 fe5 8.Qh5 Ke7 9.Qg5 Nf6 10.Be5 Ke6+=) 7...a6 (7...g4 8.Nh4 d5 9.cb5 Bb4 10.Be2=) 8.a3 (8.Ne5 fe5 9.Qh5 Ke7 10.Qg5 Nf6 11.Qe5 Kf7=) 8...d6 (8...g4 9.Nh4 d5 10.cd5 cd5 11.Be2=) 9.Be2 (9.d4 Bg7+=) 9...Qe7 (9...bc4 10.Bc4 g4 11.Ng1=) 10.0–0 (10.d4 Be6+–) 10...Qe6 (10...bc4 11.Bc4 d5 12.Be2+=) 11.Qc2 (11.d4 g4 12.Nfd2 a5+–) 11...h5 (better 11...bc4 12.Bc4 d5+=) 12.Ne5?? (better 12.d4+–) 12...de5 (better 12...fe5 13.d4 bc4 14.Bc4 d5–+) 13.Bh5?? (better 13.d4–/+) 13...Rh5–+ 14.Qg6 (14.c5 Ra7 15.Qg6 Qf7 16.Qf7 Rf7–+) 14...Qf7 15.Qd3 (15.Qf7 Kf7 16.c5 a5–+) 15...bc4 (better 15...Be6 16.Qc2 Bc4–+) 16.g3 (16.Qc2–+) 16...Bf5 (16...cd3 17.f3–+) 17.f4?? (17.Qf5 Ne7 18.Qe4 Rh8–+) 17...Be4 (17...Bd3 18.Nc3 gf4 19.Rf3–+) 18.Nc3?? (better 18.Qe4 gf4 19.ef4–/+) 18...Bd3 19.Rae1 Be7 (better 19...Bf1 20.Rf1 gf4 21.ef4 Qa7 22.Rf2 Rh2 23.Ne4–+) 20.Ne4 Rh8 (better 20...Be4 21.Rf2–+) 21.Nd6 Kd8 ½–½. GuestCVDK – GuestKTVL, freechess.org, 2016.

3.e4 Na6 4.a3 d6 (4...Nf6 5.e5 Nd5 6.c4 bc4 7.Bc4+=) 5.c4 Be6? (better is 5...Nc7!?+=) 6.cb5+– Nc7 (6...Nb8!?+–) 7.bc6 Nb5?? (7...d5 8.e5 Nh6+–) 8.Bb5 Qb8 (8...Qc7 9.Nc3+–) 9.Nc3 Qb6 (9...Qc7 10.d4+–) 10.c7 Bd7 11.Rc1 Qc7 (11...Nf6 12.Nd5 Qb7 13.Nf6 gf6 14.Bd7 Kd7 15.Qa4 Ke6 16.Ne2 Qe4 17.f3 Qe2 18.Ke2+–) 12.Nd5 Qb7 13.Bd7 Kd7 (13...Qd7 14.Nc7 Kd8 15.Na8 Qb7+–) 14.Qa4 Ke6 15.Nf4 1–0. Fournier,Frederic (1990) – NN, Active, 2004. (=1.e4 b5 2.b4 c6 3.Bb2)

3.e4 Bb7 4.d4 (4.a4 Nf6+=) 4...Na6 (4...Nf6 5.Bd3=) 5.a3+= Qc7 (5...Nc7 6.Bd3+=) 6.Be2 (6.c4 bc4 7.Bc4 Nf6+/–) 6...0–0–0 (6...Nf6 7.Nd2+=) 7.c4 (7.a4 Nf6 8.ab5 cb5 9.Bb5 Nb4+/–) 7...bc4 8.Bc4 e6 (8...d5 9.ed5 cd5 10.Bd3+/–) 9.Nd2 (9.Qe2 Nb8+/–) 9...Qb6 (9...d5 10.Bd3+/–) 10.Rc1 (10.Bd3 d5+/–) 10...d5+/– 11.ed5 (11.Bd3 de4 12.Ne4 Nf6+–) 11...ed5 12.Bb3 Nf6 13.Ne2 Re8 14.0–0 Bd6 15.Nc3 Nc7 16.Na4+/– Qb5 17.Nc5 Ba6? 18.Ba4+– Qb6? 19.Na6 Na6 20.Rc6 Qc6 21.Bc6 Re7 22.Qa4 Ng4 23.Qa6 Kd8 24.f4 g5 25.h3 Ne3 26.Re1 Bf4 27.Nf3 Rg8 28.Qa5 Bc7 29.Qb5 g4 30.Ne5 gh3 31.Re3 hg2 32.Qd5 Kc8 33.Bb7 Kb8 34.Nc6 Kb7 35.Ne7 (35...Kb8 36.Nc6 Kc8 37.Na7 Kb8 38.Nc6 Kc8 39.Qf5 Kb7 40.Qb5 Bb6 41.Re7 Ka8 42.Qa4 Ba7 43.Qa7; 35.Re7 Kb6 36.Qa5 Kc6 37.Rc7 Kd6 38.Qe5) 1–0. 73DADDELDU37 – Hobbykegler, mySchach.de, 2005.

3.e4 Nf6 4.Nc3 a6 5.e5 Ng8 6.Nf3 d6 7.ed6 Qd6 8.Ne4 Qb4 9.Qe2 Qb2 10.Rd1 Qa2 11.Nd6 Kd7 12.Nf7 Nf6 13.Qd3 Kc7 14.Qd8 Kb7 15.Nd4 Qf7 16.Bb5 ab5 17.Nb5 cb5 18.0–0 Rg8 19.Rb1 Qc4 20.d3 Qc2 21.Rb5 Ka7 22.Qa5 Na6 23.Qb6 1–0. guest1818 – guest186, ICS blitz, 2001.

3.Nf3 a5 4.ba5 Qa5 5.e3 Nf6 6.Be2 d6 7.0–0 Bb7 (7...e5 8.c4 bc4 9.Bc4=) 8.d3 (8.c4 e6+=) 8...Nbd7 9.h3 g6 10.Nbd2 Bg7 11.Nb3 Qc7 12.e4 0–0 13.Re1 c5 14.c4 (14.Qb1!?=+) 14...bc4–/+ 15.dc4 Be4 16.Bd3 Bd3 17.Qd3 e5 18.Nh2 Rfd8 19.Red1 e4 20.Qd6 Qd6 21.Rd6 Ne8 (21...e3!? 22.Bf6 Bf6–/+) 22.Rd2=+ Bb2 23.Rb2 Ne5 24.Rc2 (24.Nc5 f5=) 24...Rd3 (better 24...Nd3!?=+) 25.Nc5+= Rd4 The isolani on c4 becomes a target 26.Nf1 Nc4 (26...Rc8 27.Nb3 Rdc4 28.Rc4 Nc4 29.a4+=) 27.Ne3 (27.Nb3 Rd3 28.Rc4 Rb3 29.Re4 Nf6+–) 27...Ned6 (27...Na3 28.Rcc1=) 28.Nb3 (28.Nc4 Rc4 29.Rc4 Nc4 30.Ne4 f5+–) 28...Rd3 (better 28...Ne3!? 29.Nd4 Nc2 30.Nc2 Nc4=) 29.Nc4+– (29.Rc4? Nc4 30.Nc4 Rb3–+) 29...Nc4 30.Rc4 Rb3 31.ab3 (better 31.Re4!? Rba3 32.Re2+–) 31...Ra1= 32.Kh2 f5 33.b4 Rb1 34.Kg3 Kg7 35.Kf4 Rb2 36.Kg3 (36.f3!?=) 36...g5=+ 37.f3? (37.Rc7 Kf6 38.Rc6 Ke7 39.Rc7 Ke6 40.Rc6 Kd7–/+) 37...e3?? (37...f4!? 38.Kg4 Rg2 39.Kf5 ef3 40.Rc1–+) 38.Rc7? (better 38.f4!?=+) 38...Kg6–/+ 39.Rc6 Kh5 40.f4? (better 40.Kh2 f4 41.Rc4–+) 40...gf4?? (better 40...Rf2 41.fg5 f4 42.Kh2 f3–+) 41.Kf4= e2?? (better 41...Rg2!? 42.Ke3 Kg5=) 42.Re6 (42.g4 fg4 43.hg4 Kh4 44.Rh6) 42...Rb4+– 43.Kf5 Rb5 44.Kf4 Rb2?? (44...Kh4 45.Re2 Rb4 46.Kf3+–) 45.g3 (45.g4 Kh4 46.Rh6) 45...Rb4+– 46.Kf3 Rb3 47.Kf4 Rb4 48.Kf3 Rb3 49.Kf2 (49.Ke2?! Rg3 50.Re5 Kh4=) 49...Rb2 50.Kf3 (50.Re2 Rb1+–) 50...Rb3+= 51.Kf2 Rb2 52.Re5 Kg6 53.g4 1–0. amirgloo (1975) – NN (1990), lichess.org, 2019.

3.Nf3 e6 4.e4 Nf6 5.a3 (5.e5 Nd5 6.a4 ba4=) 5...a5 (5...Ne4 6.Nc3 Nf6 7.a4–/+) 6.d3 (better 6.e5!? Nd5 7.ba5 Qa5 8.c4 bc4 9.Bc4=) 6...ab4–/+ 7.ab4 Ra1 8.Ba1 Bb4 9.c3 Be7 10.Be2 Ba6 11.Nbd2 0–0 12.Qb3 d5 13.e5 Nfd7 14.d4 Qb6 15.0–0 c5 16.Re1 cd4 17.cd4 Rc8 18.Nf1 Nc6 Black prepares the advance b4 19.Ne3 Na5 20.Qb1 Nc4 21.Nc2 (21.Rc1 b4–/+) 21...b4–+ 22.Rd1?? (better 22.Bd3–+) 22...b3 (better 22...Na3 23.Ba6 Rc2 24.Qb3 Qa6 25.Re1–+) 23.Nce1 (23.Ne3 Ne3 24.Ba6 Qa6 25.fe3 Qa2–+) 23...Ba3 (better 23...b2!? 24.Bb2 Rb8 25.Bc4 Bc4 26.Nd3 Bd3 27.Qd3 Qb2 28.Qf1–+) 24.Bc4 dc4 25.Bb2? (25.Bc3 Bb7–+) 25...Bb4 (25...Bb2 26.Qb2 c3 27.Qa1–+) 26.Rc1 (26.Bc1 Bb7–+) 26...c3 27.Bc3 (27.Ba1 Qb5 28.h3 Qf1 29.Kh2 Qc4–+) 27...Bc3 28.Nd3 Bd3 29.Qd3 Qb4 (29...b2!? 30.Rd1 Bd4 31.Nd4–+) 30.Rb1 b2 31.Qa6 (31.Ng5 Nf8 32.Qc2 Qc4–+) 31...Qc4 32.h3 (32.Qb7 Nb6! 33.Qb6 Bd4 34.Qb7–+ (34.Qd4 Qd4 35.Rf1 Qd5 36.Kh1 Rc1 37.h3 Rf1 38.Kh2 b1Q 39.h4 Rh1 40.Kg3 Qbd3 41.Kf4 Q5e4 42.Kg3 Qh4)) 32...Qa6 33.Kh2 Nb6 34.g4 Nc4 (34...Qd3 35.Kg2 Qb1 36.Nd2 Bd2 37.d5 Qe4 38.f3 Qe2 39.Kg3 Be1 40.Kf4 Nd5 41.Kg5 Qe5) 35.g5 Na3 36.Rb2 Bb2 37.h4 (37.Kg2 Qe2 38.Ng1 Qe4 39.Kh2 Bd4 40.Ne2 Qe2 41.h4 Qf2 42.Kh3 Qf3 43.Kh2 Rc2) 37...Qd3 (37...Qf1 38.Kg3 Rc2 39.Nh2 Qf2 40.Kg4 Qg1 41.Kh5 Rh2 42.d5 Qd1) 38.Kg2 (38.Ne1 Qd4 39.Nd3 Qd3 40.g6 Be5 41.Kg2 Qe4 42.f3 Qe2 43.Kh3 Qf3) 38...Bd4 (38...Qe4 39.Kh3 Qf3 40.Kh2 Rc1 41.d5 Be5) 39.h5 (39.Nd4 Qd4 40.Kg3 Rc3 41.f3 Qg1 42.Kf4 Rc4) 39...Qe4 (39...Rc3 40.Ng1 Qe4 41.Nf3 Qf3 42.Kh2 Be5 43.Kg1 Rc1) 40.Kg3 (40.h6 Qg4 41.Kh2 Qf3 42.hg7 Be5 43.Kg1 Rc1) 40...Be5 (40...Rc3 41.Kh2 Qf3 42.h6 Be5 43.Kg1 Rc1) 41.Kg2 (41.Ne5 Rc3 42.Kh2 Qe5 43.Kg1 Qe2 44.g6 Qg4 45.Kf1 Rc1) 41...Qg4 (41...Rc1 42.Kh3 Qf3 43.Kh4 Rc4) 42.Kf1 Qf3 43.Ke1 Qh1 (43...Rc1 44.Kd2 Rd1) 44.Kd2 (44.Ke2 Qe4 45.Kd2 Rc2 46.Kd1 Qe2) 44...Qh5 (44...Rd8 45.Ke2 Qe4 46.Kf1 Rd1) 45.g6 (45.f3 Rc2 46.Ke3 Nc4 47.Ke4 Qg6) 45...Qg6 (45...Rc2 46.Ke3 Qe2) 46.f3 (46.Ke2 Qe4 47.Kd1 Qd3 48.Ke1 Nc2) 46...Qf5 (46...Rc2 47.Ke3 Nc4) 47.Ke3 (47.Ke2 Rc2 48.Ke1 Qd3 49.f4 Bc3) 47...Qf4 (47...Qc2 48.f4 Rc3) 48.Kd3 Nc4 (48...Qf3 49.Kd2 Rc2 50.Ke1 Qe2) 49.Kc2 (49.Ke2 Qh2 50.Kd3 Qd2 51.Ke4 Qe3) 49...Nd6 50.Kb3 Nf5 (50...Qc4 51.Ka3 Ra8) 51.Ka3 (51.Ka2 Qc4 52.Ka3 Ra8) 51...h5 (51...Ra8 52.Kb3 Qa4) 52.Kb3 (52.Ka2 Qc4 53.Ka3 Ra8) 52...h4 (52...Qc4 53.Ka3 Ra8) 53.Ka3 h3 (53...Ra8 54.Kb3 Qa4) 54.Kb3 h2 (54...Qc4 55.Ka3 Ra8) 55.Ka3 Qf3 (55...Ra8 56.Kb3 Qa4) 56.Kb4 (56.Ka4 Rb8 57.Ka5 Qa8) 56...Qg4 (56...Rb8 57.Kc4 Qc3) 57.Kb5 h1Q 58.Kb6 (58.Ka5 Qb1 59.Ka6 Ra8) 58...Qc6 59.Ka5 Ra8 0–1. alessandrocarvalhaes (1875) – drajin (1805), lichess.org, 2019.

3.h4 h6 4.Nf3 Nf6 5.Rg1 (5.a4 a6=) 5...d6 6.e3 e5 7.Nc3 Be7 8.e4 (8.a4 ba4 9.Ra4 Bg4=+) 8...Bg4 9.a4 ba4 10.Ra4 Nbd7 11.Qa1 Qb8 12.Nh2 Be6 13.g4 Nb6 (13...d5 14.ed5 Nd5 15.Nd5 Bd5 16.c4–/+) 14.Ra5 Nc4 15.Bc4 Bc4 16.d3 Be6 17.g5 (17.Qa4!? Bd7 18.h5–/+) 17...hg5–/+ 18.hg5 Rh2 19.gf6 Bf6 20.Qa4 Qb6 21.Nd1 Bd7 22.Ra6 Qb7 23.Nc3 c5 (23...d5 24.ed5 cd5 25.Qa5–/+) 24.b5–+ Bh4 25.Rd6?? (better 25.Rf1 Kf8 26.Rd6–+) 25...Bf2 26.Kd1 Bg1 27.Rd7 (27.Nd5 Bd4 28.Bd4 cd4–+) 27...Kd7 (27...Qd7 28.Kc1–+) 28.Ne2 (28.Qb3 Kd6 29.Nb1 Rah8–+) 28...Bd4 29.c3 Be3 30.Qc4 (30.Bc1 Rh1 31.Kc2 Bc1 32.Nc1 Ke8–+) 30...Kd6 (better 30...Ke8 31.Bc1 Bc1 32.Nc1–+) 31.Ba3 Qc7 (better 31...Rah8 32.Ng3 Rg2–+) 32.Qd5 Ke7 33.Qa8 Kf6 34.Qc6 (34.Qd5 Kg6 35.Qc6 Qc6 36.bc6 Kf6–+) 34...Qc6 35.bc6 Ke7 (35...Ke6 36.d4 cd4 37.cd4 ed4 38.c7–+) 36.Ng3? (36.d4 Kd6 37.Bc5 Kc6 38.Ba7 Kb5–+) 36...g6 (better 36...Rd2!? 37.Ke1 Rd3 38.Nf5 Kd8 39.Kf1–+) 37.Nf1 Rh1 (37...Ra2!? 38.Ne3 Ra3 39.Ng4–+) 38.Ke2 Bf4 39.Bc5 Kd8 40.Ba7 Kc7 41.Be3? (better 41.d4 Kc6 42.c4–+) 41…Rf1! 0–1. beatmeeasy (2005) – vladimir1951 (1890), lichess.org, 2021.

3.a4 ba4

4.Ra4 Ba6 5.Nf3 Bb5 6.Ra1 e6 7.Na3 Bb4?? (better 7...Ba6+=) 8.Bg7+– (8.Nb5?! f6 9.Na7 e5+–) 8...f6 (8...Ba6 9.c3 Be7 10.Bh8+–) 9.Bh8 (9.Nb5 cb5 10.Bh8 a6+–) 9...Nh6 (9...Ba3 10.Ra3 Qe7 11.Qa1+–) 10.Nb5 cb5 11.Qb1 Be7 12.c4 b4 (12...bc4 13.Qh7 Bf8 14.Qg6 Nf7 15.Bf6+–) 13.Qh7 Bf8 (13...Nf7 14.Bg7 Bf8 15.Bf8 Kf8 16.Nh4+–) 14.Qg6 Nf7 15.Bf6 Qb6 (15...Qc7+–) 16.Ne5 (16.Ne5 Qf2 17.Kf2 Bc5 18.Kf3 Be7 19.Qg8 Bf8 20.Qf7) 1–0. GuestJLXB – Guitljulioo, freechess.org, 2020.

4.Ra4 d6 +=.

4.Ra4 e6 5.e3 Nf6 6.Nf3 Nd5 7.c3 f6 (7...Be7 8.d4+=) 8.d4+= Nb6 9.Ra5 d5 10.Nbd2 (10.Bd3 Bd6+/–) 10...Bd6 (10...N8d7 11.e4+=) 11.Bd3 N8d7 12.0–0 f5 (12...e5 13.e4+=) 13.Qa1 Qc7 14.Qa2 (14.Qa3 0–0+/–) 14...Ke7 (14...0–0 15.Ra1+/–) 15.Ra1+/– Bb7 (15...e5 16.de5 (16.Ra7 Ra7 17.Qa7 e4–/+) 16...Ne5 17.Ne5 Be5 18.Nf3+–) 16.Qb3 (16.Ra7? Ra7 17.Qa7 Ra8–+) 16...Nc8 17.c4 Qd8 18.Qc3 Rg8 (18...Kf7 19.Nb3+/–) 19.Nb3 Bc7 (19...Rb8 20.Nc5+–) 20.R5a2 dc4 (20...Rb8 21.Nbd2+–) 21.Bc4 Nd6 (21...Ncb6 22.Nbd2+– (worse is 22.Ra7 Ra7 23.Ra7 Qb8+/–)) 22.Ng5 Nb5 (22...Nf8 23.Nc5 (23.Ra7?! Ra7 24.Ra7 Qb8+/–) 23...Nc4 24.Qc4+– (worse is 24.Nb7 Qd5+–)) 23.Qd3 (23.Qe1 Nf8+–) 23...Nf8 24.Nc5 (24.Bb5?! cb5 25.Nc5 Qb8 26.Nb7 Qb7+/–) 24...Bc8 25.e4 h6 (25...Nd6 26.Ra7 Ra7 27.Ra7+–) 26.Nf3 f4 (26...Nd6 27.Ne5 Ke8 28.Nc6 fe4 29.Qb3+– (29.Nd8?! ed3 30.Nde6 Ne6 31.Be6 Be6 32.Ne6 Bb6+–; worse is 29.Ne4 Qh4 30.Nd6 Bd6+–)) 27.Bb5 cb5 28.Ra7 Ra7 29.Ra7 Bd7 (29...Nd7 30.Qb5 Bb6 31.Ne6 Ba7 32.Nd8 Rd8 33.Ne5 Ne5 34.Qe5 (worse is 34.de5 Rd1 35.Qf1 Rf1 36.Kf1 Ba6 37.Ke1 Ke6–/+) 34...Kf8 35.Qf4 Ke8 36.Qe5 Kf8 37.Qc7+–) 30.Nd7 (better is 30.Ne5!? Qc8 31.Qb3 Be5 32.Rd7 Qd7 33.Nd7 Nd7 34.de5 Rc8+–) 30...Nd7 31.d5 (31.d5 Bb8 32.Nd4 Ba7 33.Nc6 Kd6 34.Nd8 Rd8 35.Qb5 ed5 36.ed5+–) 1–0. Schirmer,Michael – Andersson,Lars H, email 4AMM–F, 1998.

4.Ra4 e6 5.e3 Nf6 6.Nf3 Nd5 7.Be2 f6 (7...Nb4 8.0–0+–) 8.0–0 Nb4 (8...Bb4?? 9.c4 a5 10.cd5 cd5 11.Na3+–) 9.Ng5 (9.c3 Nd5 10.d4+–) 9...fg5? (better 9...Be7=) 10.Bh5+– g6 11.Bh8 gh5?? (better 11...Ba6 12.Be2 Bb5+–) 12.Qh5 Ke7 13.Qg5 Ke8 14.Qh5 Ke7 15.Rb4 (15.Rb4 d5 16.Bf6 Kd7 17.Bd8 Bb4 18.Bf6+–) 1–0. GuestGQXC – GuestHZKS, freechess.org, 2019.

4.Ra4 e6 5.e4 d5+=.

4.Ra4 Nf6 5.Nf3 +=.

4.e3 Na6 5.Ra4 Nb4? (better 5...Qb6 6.Bd4 c5 7.bc5 Nc5+=) 6.Rb4+– c5 (6...d6 7.Be2+–) 7.Rb3 (7.Rb5 d6+–) 7...a5 (7...d5 8.c4 e6 9.Nf3+–) 8.Qf3 Ra7 (8...Ba6 9.Ba6 Ra6 10.Na3+–) 9.Rb8 (better 9.Na3+–) 9...Ba6 (9...Qc7 10.Qg3 Kd8+–) 10.Rd8 Kd8 11.Ba6 Ra6 12.Qb7 Nf6 (12...Rc6+–) 13.Qb8 1–0. DEFFM – MattiCivi, freechess.org, 2018.

4.e3 d6 5.Ra4 Bd7 (5...e5 6.f4=) 6.Nf3 (6.d4 Nf6+=) 6...c5 (6...e5 7.Nc3=) 7.b5+= a6 (7...Nf6 8.Bf6 ef6 9.Nc3+–) 8.Bd3 (8.Nc3 Nf6+=) 8...Qb6 9.c4 e5 10.Ng5 Nf6 11.0–0 Be7 12.f4 ef4 (12...Bg4 13.Qc2 h6 14.Ne4+–) 13.Rf4+– 0–0?? (better 13...d5+–) 14.Rf6!+– Bf6 (14...Bf6 15.Nh7 Double attack (15.Nh7 Decoy); 14...gf6 15.Nh7 Double attack (15.Nh7 Decoy)) 15.Bh7 Kh8 16.Be4 Ra7 (16...Bh3 17.Qh5 Kg8 18.Qh7) 17.Qh5 (17.Qh5 Kg8 18.Qh7) 1–0. Anonymous – Anonymous, lichess.org, 2020.

3.a4 a5

4.ab5 cb5 5.e3 a4? 6.Bb5+– 1–0. DEFFM – GuestFDKL, freechess.org, 2018.

4.ab5 cb5 5.e3 Qb6 6.Bd4 (6.Nc3 Nc6 7.ba5 Ra5 8.Ra5 Qa5 9.Nb5 Ba6+–) 6...Qc7 (6...Qd8 7.Bc3 Nc6 8.Bb5 Nb4 9.Bb4+=) 7.Bb5 (7.Nc3 Nc6 8.Nb5 Qd8+–) 7...Qb7 (7...Bb7!? 8.Nf3 ab4 9.Ra8 Ba8+=) 8.Qf3+– Nc6 (8...e5!? 9.Be5 Qb5 10.Qa8 Qe5 11.Qa5 Qe4+–) 9.Bc6+– Qc6 (9...dc6 10.ba5 f6 11.Bc5+–) 10.Qc6 dc6 11.ba5 Ba6 (11...e6 12.Nf3+–) 12.Nf3 e6 13.d3 Nf6 (13...f6 14.e4+–) 14.Bf6 (14.Nbd2 Bb4+–) 14...gf6 15.0–0 (15.Nbd2 Bb4+–) 15...Bg7 16.Nbd2 f5 17.Rab1 (17.Ra3 Kd7+–) 17...0–0 (17...Bb5 18.Nd4 Ra5 19.Ra1+– (19.Nb5?! cb5 20.d4 0–0+–)) 18.e4 (18.Nd4 Bd4 19.ed4 Bb5+–) 18...f4? (better 18...fe4 19.Ne4 Bb5+–) 19.e5+– f6 20.Nd4 Kf7 (20...Rf7 21.Rfe1 fe5 22.Ne6+–) 21.ef6 (21.Nc6 fe5 22.Ne4 Bc8+–) 21...Bf6 22.Nc6 Rfc8 23.Rb6 Bc3 (23...Bb5 24.Rb7 Kg6 25.Rb5 Rc6 26.Nc4+–) 24.Nf3 (24.Ne4 Ba5 25.Na5 Rc2+–) 24...e5 (24...Kf6 25.g4+–) 25.Nfe5 Be5 (25...Ke6 26.Nf3 Kd7 27.Nb4 Bb4 28.Rb4 Rc2 29.Rf4+–) 26.Ne5 Kg7 27.Nc6 1–0. GuestJLXB – GuestHFDR, freechess.org, 2020.

4.ab5 cb5 5.e3 Bb7 6.Nf3 (6.Bb5?? Bg2 7.ba5 Bh1–+) 6...d6 (better 6...Nc6!?+=) 7.Bb5+– Nd7 8.ba5 Ra5 9.Bd7 (better 9.Ra5 Qa5 10.c4+–) 9...Qd7?? (better 9...Kd7 10.d3 e5+–) 10.Ra5+– Bf3 (10...e5 11.d3+–) 11.Qf3 f6 12.Qd5 (12.Bd4 Kf7+–) 12...e6 13.Qa8 Kf7 (13...Qd8 14.Qc6 Kf7 15.Ra8+–) 14.Ra7 (14.Ra7 Qa7 15.Qa7 Be7 16.Nc3+–) 1–0. GuestDWBT – GuestRHZN, freechess.org, 2019.

3.e3 a5

4.a3 a4 5.Nf3 f6 (5...d5 6.Be2+=) 6.d4 d5 7.Bd3 Bg4 8.h3 Bf3 (8...Bh5!?+/–) 9.Qf3 h5 (9...Nh6 10.e4 e6 11.0–0+/–) 10.Bg6 Kd7 11.Bf7 (better is 11.e4 e6 12.Nc3+– (12.Bh5?! de4 13.Qg4 f5+=)) 11...h4? (better is 11...e6+–) 12.Bd5! e6 13.Ba2 g5 14.0–0 Be7 15.Qe4 Nh6 16.Be6 Ke8 17.c4 f5 18.Bf5 Nf5 19.Qf5 bc4 20.Qg6 Kd7 21.d5! cd5 22.Qf5 Ke8 23.Bh8 Nc6 24.Nc3 Rc8 25.Rad1 (25...Nb4 26.ab4+–) 1–0. Trkn – guest4875, ICC, 2005.

4.a3 ab4 5.ab4 Ra1 6.Ba1 Ba6 7.Bd4 e6 8.Na3 (better is 8.e4=) 8...Bb4?? (better is 8...Nf6 9.c3 d6=) 9.Bg7+– Ba3 10.Bh8 b4 (10...h6 11.Nf3+–) 11.Nf3 (11.Qg4!? Nh6 12.Qg7 Bf1 13.Kf1 b3 14.cb3 Bf8 15.Qh7 Qb6+–) 11...Bf1 12.Rf1 Nf6 (better is 12...d5+–) 13.Qa1 Nd5 (13...Ne4 14.Qg7 d5 15.d3+–) 14.Qg7 Ke7 (14...Qe7+–) 15.e4 Nf4 (15...Qf8 16.Qh7 Nb6+–) 16.Qg5 f6 (16...Kd6 17.Qd8 Ng6 18.Bf6 e5 19.d4 ed4 20.Nd4 Nh4 21.Qb8 Kc5 22.Nb3 Kc4 23.Qb6 Ng2 24.Kd1 Ne3 25.fe3 d5 26.Qc6) 17.Bf6 (17.Bf6 Kf8 18.Qg7 Ke8 19.Qg8#) 1–0. pierre – colly, internet, 2011.

4.a3 ab4 5.ab4 Ra1 6.Ba1 Na6 7.c3=.

4.a3 ab4 5.ab4 Ra1 6.Ba1 Qb6 7.Nf3 e6 8.Be2 Bb4?? (better is 8...Na6=) 9.Bg7+– f6 10.Bh8 Be7 11.Nd4 e5 (11...Qc5 12.Nc3+–) 12.Bh5 Kd8 13.Nf5 (better is 13.Qg4 Nh6 14.Qg7 ed4 15.Qh6+–) 13...Bf8 (13...d5 14.Ne7 Ke7 15.Qf3+–) 14.Bf7 (14.Qg4!? Nh6 15.Bf6 Kc7+–) 14...Nh6 (14...Ne7 15.Bf6 d5 16.Ne7 Be7 17.Be5+–) 15.Nh6 Bh6 16.Bf6 Kc7 17.Be5 Kb7 (17...d6 18.Bd4 c5 19.Nc3+–) 18.Nc3 Na6 (18...Bf8 19.Qf3+–) 19.0–0 (19.Qh5 Bf8+–) 19...Nc5 (19...Qd8 20.d4+–) 20.Bd4 (20.Qf3 Bg5+–) 20...d6 21.Qa1 (21.Qf3!? Bg5+–) 21...Bf5 22.e4! Bg6 (22...Ne4 23.Bb6; 22...Be4 23.Ne4) 23.Bg6 hg6 24.Rb1 (24.Qa2 Bd2 25.Ra1 Bc3 26.Qf7 Kb8 27.Qe8 Kb7 28.Qe7 Qc7 29.Ra7 Ka7 30.Qc7 Ka8 31.Qc6 Ka7 32.Bc3 b4+–) 24...Bd2 (24...Qa6 25.Qb2 Ne6 26.Ne2+–) 25.Na4! Qa7 (25...ba4 26.Rb6; 25...Na4 26.Bb6) 26.Nc5 dc5 27.Qa7 Ka7 28.Bc5 Kb7 29.e5 Bc3 30.e6 Bf6 31.e7 Be7 32.Be7 1–0. Fournier,Frederic (1720) – arkovo, ChessOK.com, 2013.

4.a3 ab4 5.ab4 Ra1 6.Ba1 Nf6 7.Ne2 e6=+ 8.Ng3 (8.c3 d5=+) 8...Be7 (8...Bb4 9.Nh5 Nh5 10.Qh5–/+) 9.c3 (9.Bf6 Bf6 10.d4 0–0=) 9...0–0=+ 10.Be2 Bb7 11.0–0 c5 (11...d6 12.Na3=+) 12.Bb5 (12.bc5 Qa5 13.Bb2 Bc5+=) 12...cb4= 13.cb4 Qb6 (13...Bb4 14.Qa4 Be7 15.Rc1=) 14.Be2 (14.Qe2!?+=) 14...Qb4= 15.Bc3 Qb6 16.Qa4 Qc6 17.Qc6 Nc6 18.Bf3 (18.Bf6 Bf6 19.d4 Be7=) 18...Nd8 (18...d5 19.Rc1=+) 19.Bf6 Bf6 20.d4 (20.Bb7 Nb7 21.d4 d5=) 20...Bf3=+ 21.gf3 d5 22.Kh1 (22.Rc1 Nb7=) 22...Nc6=+ 23.Rg1 g6 24.Nd2 Rb8 25.f4 (25.Rc1 Nb4=+) 25...Kh8 (25...Rb2 26.Rd1–/+) 26.Nf3=+ Rb2 27.Kg2 Nb4 28.Ng5 (28.Ne5 Kg7=+) 28...Bg5 (28...Kg7!?–/+) 29.fg5= Nd3 (29...Kg7 30.Rd1=) 30.Rf1 (30.Nh1 h6 31.h4 Kg7=) 30...Kg7=+ 31.h4 h6 32.Kf3 hg5 33.hg5 Nb4 (33...f6 34.gf6 Kf6 35.e4=+) 34.Ne2= Nc2 (34...Nd3 35.Nf4 Nf4 36.Kf4=) 35.Rc1 Nb4 (35...Na3 36.Rc7+=) 36.Rf1 (36.Nf4!?+=) 36...Nd3= 37.Rd1 Nb4 (37...e5 38.Kg3 e4 39.Nc3 Nf2 40.Ra1=) 38.Rc1 (38.Nf4 Nc6+=) 38...Nd3 39.Rc3?? (better 39.Rd1 e5 40.Kg3=) 39...Ne1–+ 40.Kg3 Re2 41.Rc1 (41.Rb3 Rd2–+) 41...Nd3 42.Rf1 e5 (better 42...f6!? 43.gf6 Kf6 44.Rd1–+) 43.de5 Ne5 44.Kf4 (44.Rd1 f5 45.gf6 Kf6 46.Rd5 g5–+) 44...Nd3 45.Kf3 Rd2 46.Kg3 Ne5 (46...f6 47.gf6 Kf6 48.Rg1–+) 47.Kf4 (47.Rb1 f6 48.f4 Nc4 49.Rb7 Kf8 50.gf6 Ne3–+) 47...Nd7 (47...f6 48.gf6 Kf6 49.Kg3–+) 48.f3 d4 49.ed4 Rd4 50.Kg3 (50.Ke3 Rd5 51.f4 Nc5–+) 50...Ne5 (50...f6!? 51.gf6 Kf6 52.Ra1–+) 51.f4 Nd3 52.Kg4 Nc5 53.Kg3 Ne6 54.Rf3 Rd1 (54...f6 55.Re3 Kf7 56.Rf3–+) 55.Kf2 Rh1 (55...f6 56.Re3 Rd6 57.gf6 Kf6 58.Re4–+) 56.Kg2 Rh4 (better 56...Re1!? 57.Kh3–+) 57.Kg3 Rh1 58.Kg2 Re1 59.Kf2 Re4 60.Kg3 Nd4 (better 60...f6!? 61.Rc3–+) 61.Rf2 Nf5 62.Kg4 Re3 (62...f6 63.Rb2–+) 63.Rh2 (63.Rf3–+) 63…Rg3 0–1. Sergio1976 (1860) – Kabatana_Michael (1875), lichess.org, 2021.

4.a3 e6 5.Nf3 (5.a4 A) 5...Bb4?? 6.Bg7 (6.ab5?! Nf6=) 6...Ba6 7.Bh8+–; B) 5...ab4?! 6.ab5 Ra1 7.Ba1=; C) 5...Nf6=) 5...f6 (5...ab4 6.ab4 Ra1 7.Ba1=) 6.Nh4 (6.a4 d5=) 6...g6 (6...Nh6=) 7.Bd3 (better is 7.a4=) 7...Ne7?? (better is 7...ab4 8.Qf3 d5–/+) 8.Bf6+/– Rg8 9.Nc3 (9.Nf3 ab4 10.Ng5 h6+/–) 9...d5 10.0–0 (10.f4 Nd7 11.Bd4 Nf5 12.Nf5 ab4 13.Ng7 Bg7 14.Bg7 bc3 15.Bc3 e5+/–) 10...Qb6 (10...Qd6 11.Nf3 Nd7 12.e4+/–) 11.Qf3 (11.Nf3 Nd7 12.Bg5 e5+/–) 11...Nf5 (11...Nd7 12.Bg5+/–) 12.Nf5+– ef5 (12...gf5 13.Qh5 Rg6 14.Ne2+–) 13.Nd5! cd5?! (13...Qb7 14.Nc3 ab4 15.ab4 Ra1 16.Ra1 Bb4+–) 14.Qd5 (14.Qd5 Qf6 15.Bb5 (15.Qg8?! Bd7+–) 15...Bd7 16.Qa8+–) 1–0. Wall,Bill – Barsalou,Norm, internet, 2004.

4.a4 ab4 5.ab5 Ra1 6.Ba1 cb5 7.Bb5?? (better 7.Qg4 Qc7 8.Bg7=) 7...Qa5–+ 8.Bg7 Bg7 9.Qg4 Bf6 (9...Qb5?! 10.Qg7 Qc6 11.Qh8 Qg2 12.Qe5= (12.Qh7? Kf8–+)) 10.Qh5 Nc6 11.Nf3 (11.Qe2–+) 11...Ba6 12.c4 (12.Nd4 Bd4 13.Be2 Qh5 14.Bh5 Bb2–+) 12...bc3 13.Nc3 (13.0–0 Bb5 14.Rc1 cd2 15.Nbd2 Qa3–+) 13…Bc3 (13...Bc3 14.dc3 Qa1 15.Ke2 Bb5 16.Qb5 Qh1–+) 0–1. GuestMPBT – GuestKMZM, freechess.org, 2017.

4.a4 ab4 5.ab5 Ra1 6.Ba1 c5 7.d4+= Qa5 (7...cd4 8.Bd4 d6 9.f4+=) 8.Nd2 e6? (better 8...d6!?+=) 9.Nb3 (9.dc5 Bb7+–) 9...Qc7 (9...Qd8 10.dc5 (worse 10.Nc5 Nf6+–) 10...d6 11.c6+–) 10.dc5 Nf6 11.Bf6 gf6 12.Qd4 e5 (12...d6 13.c6+–) 13.Qb4 Bb7 14.b6 (14.Ne2 Bd5+–) 14...Qc8 15.Qh4 (better 15.Nf3!?+–) 15...Bc5+– 16.Qf6?? (better 16.Bd3 Ke7 17.Ne2 Bg2 18.Rg1+–) 16...Bb4–+ 17.Kd1 Rg8?? (better 17...Qc3 18.Kc1 Be4 19.Qh8 Ke7 20.Qe5 Qe5–+) 18.Qe5+– Kf8 (18...Be7 19.Nf3+–) 19.Nf3 (19.Ne2 Nc6 20.Qf5 Rg7+–) 19...Bc3 (19...Bf3 20.gf3 Qb7 21.Qf6+–) 20.Qd6 Ke8 21.Nc5 (21.Nbd4 Bf3 22.Nf3 Nc6+–) 21...Rg6 (21...Bf3 22.gf3 Bb4 23.Qc7+–) 22.Nb7 Qb7 23.Qc7 Qd5 24.Bd3 Qa5 (24...Nc6 25.b7 Rg2+–) 25.Qb8 (25.Bg6 hg6 26.Qb8 Ke7+–) 25...Ke7 26.Bg6 hg6 27.Qa7 Qd5 (27...Qb5 28.Nd2 Qb4 29.Nb3 Qg4 30.Kc1+–) 28.Kc1 Qb5 29.Ne1 1–0. DEFFM – cresox, freechess.org, 2018.

4.a4 ab4 5.ab5 Ra1 6.Ba1 d6=.

4.ba5 Ra5 5.Nf3 d5=.

3.e3 a6

4.a4 Bb7+=.

4.a4 d6 5.ab5 cb5 6.Qf3 Ra7 7.Bb5 Bd7 8.Bc4 (better 8.Nc3+–) 8...Bc6?? (better 8...Nf6+–) 9.Qf7+– Kd7 10.Nf3 Rb7 (10...Kc8 11.b5 Nh6 12.Qe6 (12.bc6?! Nf7 13.Be6 Kc7+=) 12...Bd7 13.Qe4+–) 11.Qf5 (11.Be6 Kc7 12.Qf4 Bd7 13.Qc4 Nc6 14.Ra6 Rb4 15.Rc6 Bc6 16.Qb4 Qb8 17.Qa5 Qb6+–) 11...Kc7 12.Nd4 g6 (12...Nh6 13.Ne6 Kc8+–) 13.Ne6 Kd7 (13...Kc8 14.Qd3 Qd7 15.Nf8 Qe8 16.Bh8 Qf8+–) 14.Nf8 Ke8 15.Qf7 (15.Bh8?! gf5 16.Ne6 Qc8+–) 1–0. DEFFM – GuestKMXR, freechess.org, 2019.

4.c4 a5 5.cb5+= ab4 6.Bc4 (6.a3 ba3 7.Ra3 Ra3 8.Na3 Nf6+=) 6...e6 (6...d5 7.Be2=) 7.Nf3 Qa5 (7...d5 8.Be2=) 8.bc6 (8.a3 Bb7 9.bc6 Nc6+=) 8...Nc6= 9.0–0 (9.a3 Rb8=) 9...f6 (9...d5 10.Be2=) 10.Qc2 (10.a3 Rb8+=) 10...Ne5 (10...Ba6!?+=) 11.Ne5+/– fe5 12.Bd3 (12.a3 Qc7+/–) 12...Bd6 (12...Nf6 13.a3 ba3 14.Na3+/–) 13.Bh7 (13.a3 Bb7 14.ab4 Qb4 15.Ra8 Ba8+/–) 13...Nf6 14.Bg6 Ke7 (better is 14...Kd8 15.a3 Rb8 16.ab4 Qb4+/–) 15.d3 (15.a3 Ba6 16.ab4 Qb4 17.Rc1+=) 15...Ba6= 16.Nd2 (16.Rd1 e4 17.h3 (17.de4?? Bh2 18.Kh1 Qc7 19.Qc7 Bc7 20.Kg1 Bh2 21.Kh1 Be5 22.Kg1 Bb2–+; 17.Be4? Bh2 18.Kf1 Ne4–+) 17...Bd3 18.Rd3 ed3 19.Bd3–/+) 16...Rac8 (16...e4!? 17.Ne4 Bh2 18.Kh1 Ne4 19.Bg7 Be5 20.Bh8 Rh8 21.Kg1 Bh2 22.Kh1 Qe5–+) 17.Qb3 (17.Qd1!?+=) 17...e4= 18.f4 (18.Ne4? Ne4 19.f4 Nd2–+; 18.Be4?? Bh2 19.Kh1 Bg3 20.Kg1 Rh1 21.Kh1 Qh5 22.Kg1 Qh2) 18...ed3 (18...ef3 19.Nf3 Rh6–/+) 19.Bd3+/– Bd3 20.Qd3 Qh5 21.h3 Ng4? (better is 21...Bc5+/–) 22.hg4+– (22.hg4 Qg4 23.Ne4+–) 1–0. Wall,Bill – Smokey, internet, 2005.

4.c4 Nf6 5.Nf3=.

3.e3 Bb7

4.a4 ba4 5.Ra4 a5 6.Be2 (6.ba5 Ra5 7.Ra5 Qa5+=) 6...ab4 (6...c5 7.Bf3 (worse 7.bc5 Bg2 8.Bf3 Bh1 9.Bh1 Nc6–/+) 7...Qb6 8.Nc3 cb4 9.Nd5 Bd5 10.Bd5=) 7.Rb4+= Qc8 (7...Ba6 8.d3+=) 8.Nf3 (8.Rb3 d6+=) 8...Ba6 (8...e5 9.Rb3 d6 10.0–0+=) 9.Nc3 (9.0–0 f6+=) 9...Be2 (9...d5 10.Rb3+=) 10.Qe2 (10.Ne2 d5+=) 10...e6 (10...d5 11.Rb3+=) 11.Rb3 Nf6 12.e4 (12.0–0 d5+=) 12...Na6 13.d4 Nc7 (13...d5 14.0–0+=) 14.Ne5 (14.0–0 d5+=) 14...Bd6? (better 14...Qa6+=) 15.Nc4+– (15.Nc4 Be7 16.Nb6+–) 1–0. GuestCGQT – GuestNKQK, freechess.org, 2018.

4.Nf3 f6 5.c4 (5.a4 e5+=) 5...a6 (5...bc4 6.Bc4 d5 7.Be2=) 6.a4 (6.d4 bc4 7.Bc4 d5+=) 6...e6 (6...bc4 7.Bc4 d5 8.Be2=) 7.ab5 (7.c5 ba4 8.Ra4 a5+–) 7...ab5 (7...Bb4 8.Bc3 Bc3 9.Nc3 cb5 10.cb5+=) 8.cb5 (8.Ra8 Ba8 9.c5 e5+=) 8...Bb4 (8...Ra1 9.Ba1 Bb4 10.Bc3=) 9.Ra8+= Ba8 10.Nd4 (10.Bc3 Be7+=) 10...cb5 (10...e5 11.Nf5 g6 12.Qa4+=) 11.Qh5+= g6 (11...Kf8!?+=) 12.Qb5+– Qa5?? (12...Bd6 13.Ne6 Qe7 14.Nd4+–) 13.Ne6 (better 13.Qb8 Ke7 14.Nc3+–) 13...Qb5+– 14.Bb5 (14.Nc7 Kf7 15.Nb5 Ne7+–) 14...Bd6 (better 14...Bg2!? 15.Rg1 Bb7+=) 15.0–0 (15.f3 Ke7 16.Nd4 Nc6+–) 15...Bc6 (15...Bd5 16.Nd4+–) 16.Nd4+– Ne7 (16...Bb5 17.Nb5 Bb4 18.Rc1+–) 17.Nc6 Nbc6 (17...dc6 18.Bf6 Rf8 19.Be7 Ke7 20.Bc4+–) 18.Bf6 0–0? (18...Rf8 19.Bb2+–) 19.Bc3 (19.Bc4 Rf7+–) 19...Ne5? (19...Rb8 20.Bc4 Kf8+–) 20.Be5 (20.f4 Nf7 21.Bd7 Rb8+–) 20...Be5 21.Bd7 (21.d4 Bd6+–) 21...Nf5 (21...Bb2 22.Be6 Kg7 23.d4+–) 22.Be6 (22.d4 Bd6+–) 22...Kg7 23.f4 Bf6 (23...Bb2 24.g4 Nd6 25.d4+–) 24.Bf5 (24.g4 Nd6+–) 24...gf5 25.Nc3 (25.Kf2 Bb2+–) 25...Rd8 26.Rf2 (26.d4 Rd4 27.ed4 Bd4 28.Rf2 Bc3+–) 26...Be7 (26...Bc3 27.dc3 Rd1 28.Rf1+–) 27.d4 Kf6 (27...Bb4 28.Nb1+–) 28.g3 (28.Rb2 Rd7+–) 28...Ke6 (28...Bb4 29.Rc2+–) 29.Kg2 (29.Rb2 Bd6+–) 29...Rc8 30.Na4 (30.Nb5 Kd5+–) 30...Rc4 31.Nc5! Bc5 32.dc5 Rc5 33.Kf3 Kf6 (33...h5 34.h3+–) 34.Ra2 (34.g4 Rc3 35.h3 Rc1+–) 34...Kg6 (34...Rc3 35.h3 h5 36.Re2+–) 35.g4 h6 (35...fg4 36.Kg4 Rc4 37.Ra6 Kf7 38.Kg5+–) 36.Ra6 (36.Ra6 Kg7 37.gf5 Rf5 38.e4+–) 1–0. DEFFM – GuestQHGY, freechess.org, 2016.

4.Nf3 Nf6 5.a3 e6 (--> 1.b4 b5 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 c6).

3.e3 e6

4.a4 Bb4?? 5.Bg7 (5.ab5?! Nf6=) 5...Be7 6.Bh8+–.

4.a4 Bb7+=.

4.c4 bc4 5.Bc4 Na6 6.b5 (6.a3 c5+=) 6...Nc7 (6...cb5 7.Bb5 Rb8 8.a4=) 7.a4 (7.bc6 dc6 8.Nf3 Rb8+=) 7...Bb7 8.Nf3 cb5 9.ab5 Nf6 10.Nc3 d5 11.Be2 Ne4 12.d3 (better 12.Qa4!? Nc5 13.Qc2+=) 12...Nc3=+ 13.Bc3 f6 (better 13...Nb5!? 14.Ba5 Qd6=+) 14.Qa4 (14.Qa4 Qd7 15.d4+=) 1–0. GuestZHCZ – GuestTCBF, freechess.org, 2017.

4.Nf3 d5 5.Be2 f6 6.a3 e5 7.Nh4 (7.Bc3 a5 8.ba5 Bd6=) 7...e4 (7...a5 8.a4=+) 8.Bh5 (8.Bg4 Nh6 9.Bc8 Qc8=+) 8...g6=+ 9.Ng6 (9.Bg4 a5=+) 9...hg6–/+ 10.Bg6 Ke7 11.f3? (11.h4 Nd7–/+) 11...Nd7?? (better 11...Rh6 12.Be4 de4 13.fe4 Qd6–+) 12.fe4=+ de4 (12...Ne5 13.Bf5=+) 13.0–0 (13.Be4 Qc7=) 13...Rh6 (13...Qc7 14.g3 Ne5 15.Be4 Be6=) 14.Bh5 (14.Be4!? Ne5 15.Be5 fe5 16.Qf3+=) 14...Ne5 (14...Nb6–/+) 15.d4? (better 15.Rf4=+) 15...Nc4–+ 16.Bc3?? (16.Bc1 a5 17.ba5 Be6–+) 16...Be6 (better 16...Qd5 17.Bf3–+) 17.Qc1?? (better 17.Bd2–+) 17...Rh5 18.d5 (18.Qd1 Qe8 19.Qe1 Kd8–+) 18...cd5 (18...Qd6!? 19.g3 Bh6 20.Re1 Rd5 21.a4 Be3 22.Re3 Rd1 23.Re1 Rc1 24.Rc1–+) 19.Bd4 Qc7 20.Bc5 (20.g3 Ne5 21.Qd1 Nf3 22.Rf3 Bg4–+) 20...Ke8 21.g3 Bc5 (21...Bc5 22.bc5 Qc5–+) 0–1. GuestCWVK – GuestNWLK, freechess.org, 2017.

4.Nf3 f6 5.a4+= Ba6 (5...Bb4 6.ab5 a6 7.Ra4+=) 6.ab5 Bb7 (6...Bb5!? 7.Bb5 cb5+/–) 7.c3 (7.bc6 Nc6 8.b5 Nb4+–) 7...c5 (7...cb5 8.Bb5 Qb6 9.Qa4+/–) 8.bc5+– Bc5 9.d4 Bd6 (9...Bb6 10.Bd3+–) 10.c4 Qc7 (10...Ne7 11.c5 Bc7 12.Bd3+–) 11.c5 Be7 12.Nbd2 Bd5? (12...a6+–) 13.e4 Bb7 14.Ra7!! Qc8 (14...Ra7 15.b6) 15.Ra8 Ba8 16.Bd3 d6 (16...Bb7 17.0–0+–) 17.c6 Qc7 (17...d5 18.ed5 ed5 19.0–0+–) 18.Qa4 d5 (18...Bc6 19.bc6 d5 20.Qb3 Nc6 21.ed5 ed5 22.Qd5+–) 19.Qa8 (19.b6 Qc6 20.Bb5 Kf7 21.Bc6 Bc6+–) 19...Qb6 (19...de4 20.Be4 Nh6 21.Qa2+–) 20.Bc3 f5 (20...Bd8+–) 21.Ba5 Bd6 22.Bb6 Ne7 23.e5 Nc8 24.ed6 Nb6 25.Qb8 (25...Nc8 26.Qc8 Kf7 27.Ng5 Kg6 28.Qe6 Kh5 29.Be2 Kg5 30.h4 Kf4 31.g3) 1–0. Fournier,Frederic – Salan,Pascal, AJEC Defi cor, 1996.

4.Nf3 Nf6 5.a3 Be7 6.c4 bc4 7.Bc4 d5 8.Be2 Nbd7 9.0–0 0–0 10.d3 Bb7 11.Nbd2 c5 12.b5 Nb6 (12...Bd6 13.Qc2=) 13.a4 Qc7 14.a5 Rfd8? (better 14...Nbd7+=) 15.ab6+– Qb6 16.Be5 (16.Rb1!? Nd7+–) 16...Qb5 17.Qc2 a6 18.Rfb1 Qc6 19.Bg3 Rdc8? (better 19...Qc8+–) 20.Ne5 Qd7 (20...Qc7 21.Nf7! e5+–) 21.Nd7 Nd7 22.Rb7 (22.Rb7 Bf6 23.Ra5+–) 1–0. GuestSKYR – jeanlucc, freechess.org, 2017.

4.Nf3 Nf6 5.a4=.

3.e3 Nf6

4.a4 ba4 5.Ra4 e6 6.b5 cb5 7.Bb5 Be7 8.Nf3 0–0 9.Bd4 Nc6 (9...a6 10.0–0=) 10.Bc6 dc6 11.Ra7 (worse 11.Ba7 Qd7 12.Ne5 Qb7–+) 11...Ra7 12.Ba7 c5 13.d4?? (13.Bb8 Ne4=) 13...cd4?? (better 13...Qa5 14.c3 Qa7–+) 14.Bd4= Bb4 (14...Qc7 15.0–0=) 15.c3+= Be7 16.0–0 Nd5 (16...Ba6 17.Re1+=) 17.c4 Nc7 (17...Nb4 18.Qb3+–) 18.Nc3 (18.Bb6 Qd1 19.Rd1 Na8+–) 18...Na6 19.Qa4 (19.Qe2 Bb7+–) 19...Nb4 (19...Bb7!?+–) 20.c5 Nd3 (better 20...Nd5 21.Qb3 Nc3 22.Qc3 f6+–) 21.Ne4?? (better 21.Qb5 e5 22.Ne5 (22.Qd3?! ed4 23.Qd4 Qc7+–) 22...Ne5 23.Be5+–) 21...f5 (21...Bb7 22.c6 Qa8 23.Qc2 Bc6 24.Ra1=) 22.Ng3 Nc5 (22...Bc5? 23.Rd1 Bd7 24.Qc2 Bd4 25.Qd3+– (worse 25.Nd4 f4 26.Nge2 fe3 27.Qd3 ef2 28.Kf1 Qb6+–; 25.ed4?! Nf4+=; 25.Rd3?! Bf6+=)) 23.Bc5 (23.Qc2 Qd5+=) 23...Bc5= 24.Ne5 Bd6 25.Nf3 (25.Rd1 Qc7 26.Nc4 Bg3 27.hg3 e5=) 25...Bg3 26.hg3 Re8 (26...Bb7 27.Rd1 Qc8 28.Qd7=) 27.Nd4 (27.Rd1 Qe7=) 27...e5 28.Nb5 Qd7 29.Qb4 (29.Rd1 Qe7=) 29...Qb7 (29...Rd8 30.Qc4 Qf7 31.Qc3=+) 30.Rb1 (30.Qc5 Qe7 31.Rc1 Bd7=) 30...Bd7 31.Nd6 The mate threat is Qxb7 31...Qb4 32.Rb4 Re6?? (better 32...Ra8=) 33.Rb8+– Be8 34.Re8 Re8 35.Ne8 Kf7 36.Nd6 Ke6 37.Nc4 g6 38.Nd2 e4 (38...Kd5 39.f3+–) 39.f3 Ke5 40.f4 Ke6 (40...Kd5 41.g4 h6 42.gf5 gf5 43.Kh2+–) 41.Kf2 (41.g4 g5+–) 41...Kf6 (41...h5 42.Nc4+–) 42.Nc4 (42.g4 fg4 43.Ne4 Kf5 44.Ng3 Ke6+–) 42...Ke6 (42...h5 43.Ne5+–) 43.Ne5 Ke7 (43...g5 44.g4 fg4 45.Kg3+–) 44.Ng6 Kf6 (44...hg6 45.g4+–) 45.Nh4 Ke6 46.Nf5 Kd5 (46...Kf5 47.Ke2+–) 47.g4 Kc4 48.g5 Kc3 (48...Kd5 49.Ng7+–) 49.Ng3 (better 49.Nd4 Kc4 50.f5 Kd5+–) 49...Kb2 (49...Kc4+–) 50.Ne4 Kb1 51.f5 Ka2 52.f6 Kb3 53.f7 Kb2 54.f8Q Ka1 (54...Ka1 55.Qb4 h5 56.Nc3 h4 57.Qa3; 54...Kb3 55.Nd2 Kc2 56.Ke2 h5 57.Qf5 Kc3 58.Qb1 h4 59.Qb3) 0–1. RichardSommer (1955) – Maksimka20 (1930), lichess.org, 2020.

4.a4 ba4 5.c4 d5 6.Qa4 dc4 7.Bc4 e5? (better 7...Nd5!?=) 8.Be5 (8.Nf3 Qd6 9.Ne5 Be6+–) 8...Bf5 (8...Nfd7 9.Nf3+–) 9.Bb8 (9.Nf3 Nfd7+–) 9...Rb8 10.Qc6 Bd7 11.Qd5?? (better 11.Ra7 Bb4 12.Qa6+–) 11…Nd5–+ (11...Nd5 12.Bd5 Bb4–+) 0–1. GuestMZCR – GuestSYVC, freechess.org, 2017.

4.a4 e6 5.ab5 cb5 6.Bb5 Qb6 7.Be2 Bb4 8.Ba3 (8.Bd4 Qc7+=) 8...Ba3 9.Ra3 Qb2 (9...Bb7 10.Nf3=) 10.Rb3+= Qe5 11.Nf3 Qd6 12.c4 0–0 13.Nc3 a5 14.0–0 a4 (14...Ba6 15.Qa1+=) 15.Rb1 a3 16.Ra1 a2 (16...Bb7 17.Qb3 Bc6 18.d4+–) 17.Nd4 Ne4?? (better 17...Bb7+–) 18.Qb3 (18.Ne4!? Qb6+–) 18...e5?? (better 18...Nd2 19.Qb2 Nf1 20.Bf1 Nc6–+) 19.Ne4+– Qe7 (19...Qg6 20.Nb5 d5 21.Ng3+–) 20.Nf5 Qe6 21.Nfd6 Nc6 22.Ra2 Ra2 23.Qa2 Rd8 (23...Ne7 24.Ra1+–) 24.Qa1 (better 24.Qa8 Qg6+–) 24...Ne7 (24...Rf8 25.c5 Qe7 26.Bc4+–) 25.Nc8 (better 25.c5 Rf8+–) 25...Rc8 (25...Nc8 26.d4 d6 27.Bd3+–) 26.Rc1 (26.c5!? Rf8+–) 26...f5 27.Ng3 f4 (27...d6 28.d4+–) 28.Ne4 (better 28.ef4 ef4 29.Nh5+–) 28...Qf5 (28...fe3 29.de3 Rf8+–) 29.Nd6 Qf8 (29...Qe6 30.c5 Kf8 31.Nc8 Nc8 32.Qa8+–) 30.Nc8 Qc8 31.d4 (better 31.Qe5 Qf8+–) 31...ed4 32.Qd4 h6 (32...fe3 33.Qe3 Ng6 34.Qd4+–) 33.Qf4 Ng6 (33...Qe8 34.Rd1+–) 34.Qd4 Qc6 (34...Nf8 35.Qd5 Ne6 36.Rd1+–) 35.Qd5 (35.Bf3 Qf6 36.Qd7 Qb2 37.Qe6 Kh7+–) 35...Qd5 36.cd5 Ne5 (36...Kf7 37.Bh5 Kf6 38.Bg6 Kg6 39.Rc7+–) 37.Rc7 Kf7 (37...g5 38.d6 g4 39.f4 gf3 40.gf3+–) 38.f4 Ng6 39.Rd7 Kf6 40.Rd8 (better 40.Rd6 Kf7 41.Bh5 Ke7 42.Rg6 Kd7+–) 40...Kf7 41.Bd3 (41.d6 Kf6 42.Bb5 Nf4 43.ef4 Kf7 44.d7 g6 45.Rf8 Kf8 46.d8Q Kf7 47.Bc4 Kg7 48.Qg8 Kf6 49.Qf7) 41...Kf6 42.Bg6 Kg6 43.d6 Kf6 44.Re8 Kf7 (44...g6 45.d7 g5 46.d8Q Kf5 47.Qd7 Kg6 48.Rg8 Kf6 49.Rf8 Kg6 50.Qf7) 45.Re5 (45.d7 Kf6 46.d8Q Kf5 47.Qd3 Kg4 48.Qg6 Kh4 49.g3 Kh3 50.Qe6) 45...Kf6 46.d7 g5 (46...Kf7 47.d8Q g5 48.f5 g4 49.Qd7 Kf8 50.Re8) 47.d8Q Kg6 48.Qd6 Kh5 49.g4! Kg4 Theme: Deflection from h6 50.Kg2 h5 (50...Kh5 51.f5 Kg4 52.Re4 Kf5 53.Qe6) 51.h3 (51.Qe6 Kh4 52.Qh3) 51...Kh4 52.f5 g4 53.Re4 (53.Qf6) 53...Kg5 54.f6 (54.Qg6 Kh4 55.Qf6) 54...Kh6 (54...Kg6 55.f7! Kh7 56.f8Q gh3 57.Kh3 h4 58.Rh4) 55.Kg3 (55.f7 Kh7 56.f8Q gh3 57.Kh3 h4 58.Rh4) 55...Kg6 56.hg4 (56.f7 Kh7 57.f8Q h4 58.Kh4 gh3 59.Re7) 56…Kh7 (56...Kh7 57.Qe7 Kg6 58.Qg7; 56...h4 57.Kh4 Kf7 58.Qe7 Kg8 59.Qg7). RichardSommer (1975) – itsFilip (1895), lichess.org, 2020.

4.c4 a6 5.Nf3 g6 6.Nc3+– Bg7 7.Qc2 (7.a4 bc4 8.Bc4 d5+=) 7...0–0+= 8.Be2 d5 9.c5 Nbd7 (9...a5 10.a3=) 10.0–0 (10.a4 Bb7+=) 10...e5 (10...a5 11.a3=) 11.d3 (11.a4 Bb7+=) 11...Ne8 (11...a5 12.a3=) 12.h3 (12.a4 Bb7+=) 12...f5 (12...a5 13.Ba3=) 13.Nh2 (13.a4!? Bb7 14.ab5 ab5 15.Ra8 Ba8 16.Qb3+–) 13...Nef6 Black intends e4 (13...a5 14.a3 Nc7=+) 14.f4 (14.a4 d4 15.Nd1 Bb7 16.ed4 ed4+=) 14...e4 (better 14...ef4 15.a4 Bb7 16.ab5 fe3–/+) 15.de4+= Ne4 16.Ne4 fe4 17.Bg7 Kg7 18.Ng4 Nf6 19.Ne5 Bd7 (19...d4 20.ed4 Qd4 21.Kh2+=) 20.Qb2 Kg8 21.Rf2 (21.a4 Qe7+–) 21...a5 22.a3 (22.a4 ba4 23.b5 cb5+–) 22...ab4 23.ab4 Ra1 24.Qa1 Qa8 25.Qb2 Qa4 (better 25...Be6+–) 26.Bg4?? (26.g4 Qa7 27.g5+–) 26...Bg4–/+ (worse 26...Ng4 A) 27.Nd7?! Nf2 (27...Ne3? 28.Nf8 Qd1 29.Kh2 Kf8 30.Qh8 Kf7 31.Qh7 Kf8 32.Qh6 Kf7 33.f5 Nf1 34.Rf1 Qf1 35.Qg6 Kf8 36.Qf6 Kg8 37.Qe5+–) 28.Nf8 Nd1=; B) worse 27.Ng4 Bg4 28.hg4 Qd1 29.Kh2 Qg4–/+; C) 27.hg4 Qa7 28.f5+–) 27.hg4 Qa6?? (better 27...Ng4 28.Ng4 Qd1 29.Kh2 Qg4–/+) 28.g5+– Nh5 29.Nd7 (29.Ng4 Ng7 30.f5 gf5 31.Nh6 Kh8 32.Nf5+–) 29...Ra8 30.Kh2 1–0. GuestJCLC – GuestBWYS, freechess.org, 2017.

3.e4 a5

4.a4 ab4 5.ab5 Ra1 6.Ba1 cb5 7.Bb5? Qa5 –+.

4.a4 ab4 5.ab5 Ra1 6.Ba1 cb5 7.d4 =+.

3.e4 d5

4.ed5 cd5 5.Qf3 Be6? (better 5...a6=) 6.Bb5+– Nd7 7.Bc6 Rc8 8.Bd5 (8.b5!?+–) 8...Bd5 9.Qd5 Ngf6 (9...Rc2!? 10.Qb3 Rc7+–) 10.Bf6+– Nf6 11.Qd8 Rd8 12.Nf3 e6 13.c3 Bd6 14.Na3 0–0 15.Nb5 Bb8 16.a4 a6 (16...Rfe8 17.Nfd4+–) 17.Nbd4 e5 18.Nc6 Rd6 19.Nb8 (19.b5!? Re8+–) 19...Rb8 20.Ne5 Ne8? (better 20...Re8 21.d4 Ne4+–) 21.d4 Re6 22.Kd2 f6 (22...Nd6 23.Kd3+–) 23.Nd7 Rd8 24.Nc5 Rc6 25.Rhe1 Nd6 26.Kd3 a5 (26...Nf5 27.Kc4+–) 27.ba5 Nf5 28.Kc4 Ra8 29.Kb5 White intends a6 29...Rcc8 30.Re6 White prepares the advance a6 30...Rcb8 31.Rb6 Rb6 (31...Re8 32.Ra2+–) 32.Kb6 (better 32.ab6 Rc8 33.b7 Nd6 34.Kb6 Nb7 35.Kb7 Rd8+–) 32...Nd6 33.a6 Nc4 (33...Rc8 34.a7 Nc4 35.Ka6+–) 34.Kb7 Re8 35.a7 Na5 36.Ka6 Nc6 37.Rb1 (37.Re1 Rd8+–) 37...h5 (37...Na7 38.Ka7 Re2 39.d5+–) 38.Rb8! Nb8 (38...Nb8 39.Kb7 Decoy; 38...Rb8 39.ab8Q Decoy) 39.ab8Q (better 39.Kb7 Nc6 40.Kc6+–) 39...Rb8 40.Ka7 Rb1 (40...Rb2 41.a5+–) 41.d5 (41.a5!? Rb2+–) 41...Kf7 42.Ne6 (42.d6 Rb2+–) 42...Ke7? (better 42...Ra1!?+=) 43.c4 (43.Ng7 Rb2 44.a5 Rf2 45.Nh5 Rg2+–) 43...Kd6 (43...Ra1 44.c5 (44.Ng7?! Ra4 45.Kb6 Rc4+=) 44...Ra4 45.Kb7+–) 44.Ng7 Kc5? (44...Ra1 45.Kb6 Ra4+–) 45.Nh5 Kc4 (45...Ra1 46.Nf6 Ra4 47.Kb7 Rc4 48.g4+–) 46.Nf6 Kc5 47.h4 (47.a5 Ra1 48.Ka6 Rh1+–) 47...Kd6 (47...Rb4 48.g4 Ra4 49.Kb7+–) 48.h5 (48.Ne4 Kc7 49.a5 Rb5 50.d6 Kc6+–) 48...Rh1 (48...Ke5 49.Ng4 Kd5 50.h6+–) 49.g4 Rh4 (49...Ke5 50.g5 Kf5 51.d6+–) 50.f3 Kc7 (50...Ke5 51.Ne4 Kd5 52.a5+–) 51.d6! Kd6 52.Kb6 (52.a5 Ke5 53.Nh7 Kf4+–) 52...Ke5 53.Nd7 Kf4 54.a5 Kf3 55.a6 Rg4 (55...Rh1 56.g5 Rb1 57.Kc6 Rc1 58.Nc5 Ke3+–) 56.Ne5 Kf4 57.Ng4 Kg4 58.a7 (58.h6 Kg5 59.h7 Kh4 60.h8Q Kg3 61.Qe5 Kh4 62.a7 Kh3 63.Qh5 Kg3 64.a8Q Kf2 65.Qaf3 Ke1 66.Qa5) 58...Kh5 59.a8Q Kg4 60.Qd5 Kf4 (60...Kg3 61.Kc5 Kf4 62.Qf7 Kg3 63.Qf5 Kh2 64.Kd4 Kg2 65.Ke3 Kg3 66.Qg5 Kh3 67.Kf3 Kh2 68.Qg2) 61.Kc5 Ke3 (61...Kg4 62.Kd4 Kg3 63.Ke3 Kg4 64.Qe4 Kg5 65.Qe6 Kh4 66.Qg6 Kh3 67.Kf3 Kh4 68.Qg4) 62.Kc4 (62.Qf5 Ke2 63.Kd4 Kd2 64.Qf2 Kd1 65.Kd3 Kc1 66.Qc2) 62...Kf4 63.Qd4 Kf5 64.Kd3 (64.Kd5 Kg5 65.Ke5 Kg6 66.Qg1 Kf7 67.Qg2 Ke7 68.Qg7 Ke8 69.Ke6 Kd8 70.Qd7) 64...Ke6 65.Ke3 Kf5 (65...Kf7 66.Qd6 Kg7 67.Qe7 Kh6 68.Kf4 Kg6 69.Qe6 Kh7 70.Kf5 Kg7 71.Qd7 Kf8 72.Kf6 Kg8 73.Qg7) 66.Qe4 (66.Qd7 Ke5 67.Qb5 Kd6 68.Ke4 Ke7 69.Qe5 Kd7 70.Kd5 Kd8 71.Qg7 Ke8 72.Kd6 Kd8 73.Qd7) 66...Kg5 (66...Kf6 67.Kf4 Kf7 68.Kf5 Kg7 69.Qe7 Kh6 70.Qg5 Kh7 71.Kf6 Kh8 72.Qg7) 67.Kf3 (67.Qe6 Kh4 68.Qg6 Kh3 69.Kf3 Kh4 70.Qg4) 67...Kf6 68.Kf4 Kf7 (68...Kg7 69.Kf5 Kh6 70.Qb7 Kh5 71.Qh1) 69.Qe5 (69.Kf5 Kg7 70.Qe7 Kh6 71.Qd7 Kh5 72.Qh7) 69...Kg6 70.Qf5 Kg7 71.Kg5 Kg8 72.Qf6 (72.Kg6 Kh8 73.Qc8) 72...Kh7 73.Qg6 (73.Qe7 Kg8 74.Kf6 Kh8 75.Qg7) 73...Kh8 74.Kf6 (74.Qe8 Kg7 75.Qe7 Kg8 76.Kf6 Kh8 77.Qg7) ½–½. beatmeeasy (1900) – Mo_fk8899 (1800), lichess.org, 2020.

4.ed5 Qd5 5.d4 Bf5 6.Nc3 Qe6 7.Nge2 f6 8.d5+/– Qd6 9.Nd4 Qb4 10.Rb1+/– cd5?? 11.Nf5+– g6 12.Qd5 (12...a6 13.Qa8+–; better is 12.Bb5!? Kf7 13.Qd5 e6 14.Qa8 ef5 15.Qb8 Qe7 16.Be2 Kg7+–) 1–0. Wall,Bill – Guest8209, Internet, 2003.

3.e4 d6

4.a4 Bd7 (4...ba4 5.Ra4 e5 6.d4+=) 5.ab5+/– cb5 6.Nf3 Qc7 7.Nc3 Qb7 8.d4 Nf6 9.d5 e5 10.Bd3 Na6 11.Ra5 Nc7 12.Qe2 Rb8 13.0–0 Be7 14.Rfa1 Ra8 (better is 14...a6!?+/–) 15.Nb5+– Nb5 16.Bb5 Bb5 17.Rb5 (17.Qb5?! Qb5 18.Rb5 Ne4+/–) 17...Qd7 18.Rba5 0–0 19.Qe3 Ng4 (19...Qg4 20.Ra7 Ra7 21.Qa7 Qe4 22.Qe7 Qc2 23.Be5 de5 24.Qe5+– (24.Ne5?! Nd5 25.Qd6 Qb2+=)) 20.Ra7 Ne3 21.Rd7 Ra1 (21...Nc4 22.Ra8 Ra8 23.Re7 Nb2 24.Kf1+–) 22.Ba1 Nc2 23.Re7 (23.Be5 de5 24.Re7 Ra8+–) 23...Na1 24.b5 (24.Rd7!? Rc8 25.Kf1 Rc1 26.Ke2 Rc2 27.Kd3 Kf8+–) 24...Rc8 25.Ng5?? (better is 25.h3 Kf8 26.Rd7+–) 25…Rc1 0–1. Taulien,Hans_Juergen – Fritz,Marco, remoteschach.de, 2001.

4.c4 Bb7 5.cb5+– cb5 6.Bb5 Bc6 7.Qa4 Bb5 8.Qb5 Qd7 9.Qd5 Qc6 10.Nc3 Nf6 11.Qd3 Nbd7 12.Nf3 e5 13.0–0 Be7 14.Rfc1 Qb6 15.a4 White plans b5 15...0–0 16.Ba3 a5 17.b5 Nc5? (better 17...Rac8+–) 18.Bc5 dc5 19.Ne5 Bd6 (19...Rad8 20.Qe2 Bd6+–) 20.Nc4 Bh2 21.Kh2 Ng4 (21...Qe6 22.Qe2+–) 22.Kg1 Qh6 23.Qg3 Nf6 24.b6 Rab8 25.Rcb1 Rfe8 26.Na5 Qd2 27.Nc6 Rb7 28.a5 Ra8 (28...Qd7 29.a6 Qc6 30.ab7 Qb7+–) 29.a6 (29.a6 Rb6 30.Rb6+–) 1–0. steveberkley (2405) – WarlpiriMan, ChessWorld.net, 2017.

3.e4 e6

4.a3 Nf6 5.Nc3 g6 6.Nf3 Bg7 7.a4 ba4 8.Na4 (8.e5!? Nd5 9.Nd5 ed5 10.Bd4+/–) 8...0–0+= 9.d3 d5 10.e5 Nh5 (10...Nfd7 11.Be2=) 11.Qd2 Nd7? (better is 11...f6+/–) 12.g4+– Nhf6 13.ef6 Bf6 14.Bf6 (14.Bg2 e5+–) 14...Qf6 15.Qd1 a5 16.ba5 Ra5 17.g5 Qf4 18.d4 c5 19.Be2 cd4 20.Nb2 (20.Qd2 Qd2 21.Kd2 e5+/–) 20...Ra1+= 21.Qa1 Ne5 (21...Qc7 22.0–0+=) 22.Qd1 (22.Ne5 Qe5 23.Nd3 Qe4+/–) 22...Ba6 (22...Qe4 23.Kf1=) 23.Nd3 (23.Ne5!? Qe5 24.f4+=) 23...Bd3=+ 24.cd3 Nf3 25.Bf3 Qe5 26.Kf1 Qg5 27.h4 (27...Qf4 28.h5=+). thotares (1735) – LuckyMiki, internet, 2007.

4.a4+= ba4 5.Ra4 d5 6.ed5 cd5 7.Nf3 +=.

4.a4+= Ba6 5.ab5 cb5 6.Na3 Qb6 7.Qg4 f6 (7...Nh6 8.Qg5+=) 8.Nb5 (8.c3 e5+/–) 8...Bb5+= 9.Qh5 g6 10.Qb5 Qb5 11.Bb5 Bb4 12.Ne2 (12.Nf3 a5+/–) 12...Be7 (12...a5 13.c3 Bd6 14.Nd4+=) 13.Nf4 e5 (13...Kf7 14.d4+/–) 14.Nd5 Nh6?? (better is 14...Bd8+/–) 15.Nc7+– Kf7 16.Na8 Nc6 (16...Rc8 17.Ra7 Rc2 18.Rb7+–) 17.Bc6 dc6 18.Ra7 (18.Ra7 Rb8 19.Bc1+–) 1–0. Mroz,Antoni – Wilk,Bronislawa, corr Poland, 1987.

4.a4 Bb4? 5.ab5?! Bf8 +=.

4.a4 Bb4? 5.Bg7 Qh4 6.Bh8 +–.

4.a4 Qe7 5.c3 Bb7 +=.

4.f4 f5 5.ef5+/– ef5 (5...Nf6!? 6.fe6 Bb4+=) 6.Qh5+– g6?? (better is 6...Ke7 7.a4 ba4 8.Qf5 d5 9.Qg5 Kd7 10.Qg4 Ke7+–) 7.Qe2 (7...Kf7 8.Bh8+–) 1–0. var – cumalotforme, Live Game Caissa's Web, 2004.

4.f4 Nf6 =+.

4.a3 a5

5.a4 ab4?! 6.ab5 Ra1 7.Ba1=.

5.a4 Bb4? 6.ab5?! Qg5=.

5.a4 Bb4? 6.Bg7 Nf6 7.Bh8 +–.

5.a4 Qh4 6.Qf3 ab4 7.ab5 Ra1 8.Ba1 cb5 9.Bb5 Bb7=.

5.a4 Qh4 6.Qf3 Bb4? 7.ab5?! Nf6=.

5.a4 Qh4 6.Qf3 Bb4? 7.Bg7 d5 8.Bh8 +–.

5.Nc3 ab4 6.ab4 Ra1 7.Ba1 Bb4 (7...Na6 8.Na2=) 8.Nb5 Nf6 (8...cb5 9.Bg7) 9.Bf6 (9.Bc3!? Be7 10.Bf6 gf6 11.Nc3=) 9...Qf6–/+ 10.c3 Ba5 (better is 10...Bc5 11.Nd4 e5=+) 11.Nd6+/– Ke7 12.Nc8 (12.Nf3 e5 13.Nc8 Rc8=) 12...Rc8 13.Nf3 (13.Qh5 d5+=) 13...d5= 14.ed5 (14.e5 Qf4=) 14...cd5 15.Be2 Nd7 (15...Nc6 16.Qa4 e5 17.Bb5=) 16.0–0 (16.Qc2 Nf8=) 16...Bc7 (16...Nc5 17.Re1=) 17.Qa4 (better is 17.Qc2=) 17...Kf8?? (better is 17...Nc5 18.Qa7 Kd8=) 18.Qd7+– Qd8 19.Qd8 Bd8 20.Nd4 (20.Ra1 h6+–) 20...g5 21.Bh5 h6 22.f4 f6 23.Ne6 Ke7 24.Nd8 Rd8 25.fg5 hg5 26.Re1 Kd6 27.Bf7 Kc5 28.Re6 Kc4 29.Bg6 Rf8 30.Kf2 f5 31.Ke2 f4 32.Bd3 Kc5 33.Bc2 g4 34.d4 Kc4 35.Rc6 Kb5 36.Rc5 Kb6 1–0. Chairboy – coolerdude, ChessWorld.net, 2005.

2.Bb2 b6

3.a4 Bb7 (--> 1.b4 b6 2.Bb2 Bb7 3.a4 c6).

3.c4 f6 4.a4 Na6 (4...e5 5.b5=) 5.b5 Nc7 6.e3 c5 (6...e5 7.Bd3=) 7.Nf3 Bb7 8.Be2 e6 9.0–0 d5 10.d4 dc4 11.Bc4 Bd5 12.Nbd2 Bc4 13.Nc4 Qd5 14.Rc1 Ne7?? (better 14...cd4!? 15.Nd4 Bc5+–) 15.dc5 (better 15.e4 Qd8 16.dc5 Qd1 17.Rfd1+– (worse 17.Rcd1 Ng6 18.cb6 ab6 19.Nb6 Ra7+–)) 15...bc5 16.Nd6 Kd7 17.Nb7 Kc8? (better 17...Ke8 18.Nc5 Qd1 19.Rfd1 Rd8+–) 18.Nc5 Qd1 19.Rfd1 (19.Rcd1?! Ng6 20.Rc1 Bc5 21.Rc5 Kb7+–) 19...Ned5 20.Ne6 (20.Ne6 Kb7 21.Nc7 (worse 21.Nf8 Rhf8 22.Nd4 Rad8+–) 21...Nc7 22.Rd7+–) 1–0. BeepBeepImAJeep (2655) – Tata190 (2110), lichess.org, 2016.

3.e3 Bb7 (--> 1.b4 b6 2.Bb2 Bb7 3.e3 c6).

3.Nf3 Ba6 4.d3 h6 5.Nbd2 d5 6.g3 Nf6 7.Bg2 e6 8.a3 Bd6 9.0–0 Nbd7 10.c4 dc4 (10...0–0!?=) 11.Nc4–/+ Bc7 (11...Qc7!?–/+) 12.Nd4+– b5 13.Nc6 (13...Qc8 14.N4a5+–) 1–0. Wall,Bill – DeepThoughts, Internet, 2002.

3.Nf3 Bb7 (--> 1.b4 b6 2.Bb2 Bb7 3.Nf3 c6).

3.f4 a6 4.e3 d6 5.Nf3 e6 6.d4 f6 7.Bd3 g6 8.Nbd2 h6? 9.Bg6+– Ke7 10.0–0 Qe8?? 11.Be8 Ke8 12.c4 Bg7 13.Nh4 Nd7 14.Qh5 Kd8 15.Qg6 Ne5 16.Qg7 Nf3 17.Ndf3 Ra7 18.Qh8 Bd7 19.Qg8 Kc7 20.e4 f5 21.e5 de5 22.Ne5 c5 23.Nd7 Kd7 24.Qg7 Kd6 25.Qa7 cd4 26.Qb6 Kd7 27.Bd4 e5 28.Be5 h5 29.Qd6 Kc8 30.Qc7# 1–0. pokerpig (2220) – idontknow, net–chess.com, 2006.

2.Bb2 Qc7

3.c4 d6 4.a4 e5 5.e3 g6 (5...a5 6.b5=) 6.b5 Bg7 7.Nf3 Ne7 8.Be2 0–0 9.0–0 f5 10.d4 e4 11.Nfd2 d5 12.Nc3 h6 (12...Be6 13.Qb3+=) 13.Qb3 Be6 14.Rac1 a6 (14...dc4 15.Bc4 Bc4 16.Nc4+–) 15.Ba3 (15.Nd5!? Nd5 16.cd5+–) 15...ab5+= 16.ab5 Re8 (16...dc4 17.Bc4 Bf7 18.Ra1+–) 17.cd5 (better 17.Nd5 Nd5 18.cd5 Bd5 19.Qd5 cd5 20.Rc7 Ra3 21.Nb1+– (21.Rb7?! f4+–)) 17...cd5? (better 17...Nd5!? 18.Nd5 Qf7+=) 18.Be7 (18.Nce4!? Qb6 19.Nc3 Kh8+–) 18...Qe7 19.Nd5 Qf7 (19...Bd5!? 20.Qd5 Kh7+–) 20.Bc4+– Nd7 (20...Kh7 21.b6 Na6 22.Nc7 Nc7 23.bc7 Bc4 24.Rc4+– (worse 24.Qc4 Qd7+–; 24.Nc4?! Rec8+–)) 21.Nf4?? (better 21.Nc7 Bc4 22.Qc4+–) 21...Bc4 22.Qc4 Qc4 (better 22...g5!? 23.Nd5 Rad8+–) 23.Nc4 g5 24.Nd5 Rac8 (24...Rad8 25.Na5 Ne5 26.Nc7+– (26.de5?! Rd5 27.Nb7 Rb8+=; 26.Nb7?! Rd5 27.de5 Rb8+=)) 25.Nd6 Rc1 26.Rc1 (26.Ne8?! Rf1 27.Kf1 Bf8+–) 26...Ra8 27.g3 (27.Ne7 Kh7 28.Nef5 Kg6 29.Ng7 Kg7 30.Nb7 Nf6+–) 27...Ra2 (27...Bf8 28.Rc7 Bd6 29.Rd7 Ba3+–) 28.Rc7 Nf6 29.Nf5 Nd5 30.Rg7 Kh8 31.Rb7 Nc3 (31...h5 32.Nd6+–) 32.Nh6 Ne2 (32...Nd1 33.Ng4 Ra1 34.Kg2+–) 33.Kg2 Ra1 (33...Nc3 34.Nf7 Kg8 35.Ng5+–) 34.Nf7 Kg7 (34...Kg8 35.Ng5 Rg1 36.Kh3+–) 35.Ng5 Kf6 36.Ne4 Kf5 37.Nc5 Rg1 (37...Kg6 38.b6 Rb1 39.g4+–) 38.Kf3 Re1 39.Rf7 Kg6 40.Rf8 (40.Nd3 Ng1 41.Kg2 Rb1 42.Ne5 Kh6+–) 40...Ng1 41.Kg2 Ne2 (41...Rb1 42.b6! Rb6 43.Kg1+–) 42.Ne6 (better 42.b6 Rb1 43.b7 Rb7 44.Nb7 Nc3+–) 42...Rg1 (42...Rb1 43.Rb8+–) 43.Kf3 Rb1 (43...Nc3 44.b6 Rb1 45.Nf4 Kg7 46.Rc8+–) 44.Nf4 (better 44.Ke2 Rb5 45.e4 Ra5+–) 44...Nf4 45.gf4 (45.Kf4 Rb5 46.f3 Rb7+–) 45...Rb5 46.Ke4 Rb3 47.Rg8 Kf7 48.Rg5 Kf6 1–0. BeepBeepImAJeep (2710) – Kazakh_Pod_Kumysom (2605), lichess.org, 2020.

3.e3 a5 4.b5+= e5 5.c4 (5.d4 e4+=) 5...Nf6 6.Qc2 cb5 (better is 6...Bc5=) 7.Na3?? (7.Nc3 bc4 8.Nb5+=) 7...b4?? (better is 7...Ba3 8.Ba3 d5–/+) 8.Nb5+/– Qc5 9.Nf3 d6+/– 10.d4 ed4 11.Bd4 Qc6 12.Bd3 Nbd7+= 13.0–0 Be7 14.Rac1 0–0 15.Rfd1 Nc5?? 16.Bf6+– Nd3? 17.Be7 Nc1 18.Bf8 Kf8 19.Qc1 Be6 20.Nd6 Rd8 21.Ne5 Qc5 22.Nb7 Rd1 23.Qd1 g6 24.Nc5 (24...Bh3 25.Qd8 Kg7 26.gh3 Kh6 27.Qg8 Kh5 28.Qh7 Kg5 29.f4 Kf5 30.Qf7#) 1–0. smurilo (1700) – C_D_B7, chessHere.com, 2006.

3.e3 d6 4.c4 Nd7 5.Nf3 Ngf6 6.d4 g6 (6...e5 7.Nc3=) 7.Nc3 Bg7 8.Bd3 0–0 9.0–0 e5 10.Re1 Nh5 11.g4 (11.a4 a5 12.b5 Re8+=) 11...Nhf6= 12.g5 Nh5 13.Qb3 White prepares b5 13...b6 (13...Kh8 14.Qc2=) 14.b5 Bb7 15.bc6 Bc6 16.Nd5 Qd8 17.h4 (17.Ba3 Bd5 18.cd5 Qe7=) 17...Kh8 (17...Bd5 18.cd5 f6 19.Rac1=) 18.Nd2 (18.Ba3 Re8 19.Bc2 Nf8 20.de5 Qc8=) 18...f5 19.Qa3 f4 (19...Nb8!?=) 20.Qd6+/– Bd5 21.cd5 fe3 22.fe3 Ng3 (22...ed4!? 23.Bd4 Bd4 24.ed4 Rf7+/–) 23.Bb5 Rf7 24.e4 (24.de5?! Nf5 25.Qb4 Ne5+=) 24...Bf8 (24...Rc8 25.Rac1 (25.de5 Rc2 26.e6 Bb2 27.ef7 Bd4 28.Kg2 Rd2 29.Kh3 Ba1 30.Bd7 Rf2 31.Ra1 Rf7 32.Qe5 Rg7+–) 25...Rc1 26.Rc1+– (26.Bc1?! Kg8+–)) 25.Qe6 Re7 26.Qg4 Nh5 27.d6 Rf7 28.Rf1 Rf4 (28...Rg7 29.de5 Nc5 30.Rf2+–) 29.Rf4 (29.Bd7?! Rg4 30.Bg4 Qd6 31.Bh5 gh5=; 29.Qd7 Bd6 30.Rf4 Nf4+–) 29...Nf4 (29...ef4 30.d5 Ndf6 31.Bc6+– (31.Bf6?! Nf6 32.Qe6 Nh5+–)) 30.de5 Nh5 (30...Bg7 31.Qf4 a6 32.Bc4+–) 31.Bd7 (31.Qd7 Qd7 32.Bd7 Bg7+–) 31...b5 (31...Bg7 32.Nc4+–) 32.Bd4 (32.e6 Ng7 33.e5 Rb8+–) 32...Qa5 (32...Bg7 33.Nb3+–) 33.Nb3 Qb4 (33...Qd8 34.e6 Ng7 35.Rf1 Bd6 36.Rf7+–) 34.e6 Ng7 35.e7 Be7 36.Bc5 Qc3 37.de7 1–0. Janek – Gustave, internet, 2016.

3.e3 e5 4.a3=.

3.e3 e6 4.Nf3 Bb4?? (better is 4...d5=) 5.Bg7+– Qd8 6.Bh8 Ke7 7.Bc3 Bc3 8.Nc3 Na6 9.Ba6 ba6 10.Rb1 Qe8 11.0–0 Nf6 12.Qe2 Qf8 13.Ne5 d6 (13...Qd8 14.Qf3+–) 14.Nc6 Ke8 15.Nb8 Rb8 (15...d5 16.Na6 Kd8+–) 16.Rb8 Ke7 17.Qc4 Qd8 18.Rc8 Qc8 19.Qc8 Nh5 20.Qc7 Kf8 21.Qd8 (21.Rb1 Kg7 22.Rb7 Kh6 23.Qf7 Kg5 24.Ne4 Kh4 25.Qe7 Nf6 26.Qf6 Kg4 27.Qg5) 21...Kg7 22.Qg5 Kf8 23.Rb1 Nf6 (23...Ng7 24.Rb7 Ne8 25.Qh5 Nc7 26.Rc7 Ke8 27.Qf7 Kd8 28.Qe7) 24.Qf6 h6 (24...Ke8 25.Rb7 h6 26.Qe7) 25.Rb8 1–0. Bonetti,Shane – digimon02, ICC, 2002.

3.Nf3 a5 4.a3 ab4 5.ab4 Ra1 6.Ba1 d5 7.Be5 Qb6 8.Bb8 e6 (8...Qb4 9.Be5+–) 9.c3 Nf6 10.e3 Be7 11.Bd3 c5 12.Qa4 (12.bc5!? Qc5 13.Be5 0–0+–) 12...Bd7 13.Qa5 Qc6 (13...Qa5 14.ba5 c4 15.Bc2+–) 14.b5 Qc8 15.Bc7 c4 16.Bc2 0–0 17.b6 Nh5 (17...Ne8 18.Bf4+–) 18.Ne5 f6 (18...Nf6+–) 19.Nd7 Qd7 20.Ba4 Qc8 21.0–0 g5 22.Bc2 e5 23.Qd5 Kh8 24.Qc4 f5 25.Ba4 Nf6 26.d4 e4 27.Nd2 h5 28.Nb3 f4 29.ef4 gf4 30.Nc5 f3 31.Ne6 Rg8 32.g3 Kh7 33.d5 Ne8 34.Qe4 Kh6 35.Qf4 Bg5 36.Ng5 Rg5 37.Qf8 Rg7 38.Qe8 Qh3 39.Bf4 Kh7 40.Bc2 Rg6 41.Qg6 (41...Kh8 42.Be5#) 1–0. chrisalvin2005 – C_D_B7 (1605), chessHere.com, 2006.

3.c4 e5

4.a3 Nf6 5.e3 d5 6.d3 a5 7.c5 Be6 8.h3 Na6 (8...ab4 9.ab4 Ra1 10.Ba1+=) 9.Nf3= Nd7 10.Nbd2 Be7 11.Nb3 0–0 12.Na5 Nac5 13.Nb3 (13.bc5 b6 Double attack (13...Ra5 Deflection)) 13...Nb3 14.Qb3 d4 15.Qc2 de3 16.fe3 f6 17.e4 Qb6 18.d4 Rad8 (18...Rfe8 19.de5 Ne5 20.Ne5 fe5 21.Qf2 (21.Be5 Qe3 22.Qe2 Bh4 23.g3 Bg3 24.Bg3 Qg3 25.Kd2 Rad8 26.Kc1 Qc3 27.Kb1 Rd2 28.Qd2 Qd2–+) 21...Bb4 22.ab4 Qb4 23.Qd2 Qe4 24.Qe2 Ra1 25.Ba1+=) 19.Bc4= Bc4 20.Qc4 Kh8 21.0–0 Bd6 22.Kh1 Rfe8 23.Bc3 ed4 24.Bd4 Qc7 25.Rae1 Bg3 26.Re2 Ne5 27.Ne5 Be5 28.Bg1 Rd7 29.b5 cb5 30.Qb5 Qc6 31.Qb1 Qa6 32.Ra2 Rd3 33.a4 Bd4 34.Bd4 Rd4–/+ 35.Re1 Ra4 36.Ra4 Qa4 37.Qb7 h5 38.Qf7 Qb5 39.Re3 Re5 40.Rg3 Rg5 41.Qb3 Qf1–/+ 42.Kh2 Qf4 43.Qf3 Qg3 44.Qg3= Rg3 45.Kg3 Kg8 46.Kf4 Kf7 47.h4 Ke6 48.g3 g6 49.Kf3 Ke5 50.Ke3 ½–½. Babichev,Vyacheslav (1765) – Koegler,Christian, Nuremberg–ch op, 2003.

4.Nf3 Bb4?? 5.Be5 d6 6.Bg7 +–.

4.Nf3 d6 5.Nc3 Nf6 6.e4 Bg4 7.a3 Nbd7 8.d4 g6 9.d5 Bg7 10.h3 Bf3 11.Qf3 0–0 12.dc6 bc6 13.Rd1 a5 14.b5 Nc5 15.Be2 Rab8 16.0–0 Nb3 17.Na4+/– cb5 18.cb5 Nc5 19.Nc5 dc5 20.a4 c4? 21.Rc1+– Rfc8 22.Bc4 Qc4 23.Rc4 Rc4 24.Be5 Rb6 25.Qd3 Rc8 26.Bc7 Re6 27.b6 Ne4 28.b7 Rc7 29.b8Q (29...Rc8 30.Qc8 Bf8 31.Qdd8 Kg7 32.Qf8 Kf6 33.f4 g5 34.Qcd8 Kg6 35.Qg8 Kh6 36.Qdg5 Ng5 37.Qg5#) 1–0. pierre (1665) – C_D_B7, chessHere.com, 2006.

2.Bb2 d6

3.a3 c5 4.bc5 dc5 5.e3 e6 6.Nf3 f6 (6...Nf6 7.Nc3=) 7.Bc4 e5 8.d3 f5?? (better is 8...Nd7+=) 9.Ne5+– (9.Be5?! Nc6+–) 9...Qe7 (9...Nh6+–) 10.Nf7 (better is 10.Qh5 g6 11.Ng6 hg6 12.Qg6 Kd7 13.Qf5 Kd8 14.Qd5 Nd7 15.Bh8 Ngf6+–) 10...Qf7 11.Bf7 Kf7 12.Qf3 Kg6 13.Qg3 Kf7 14.0–0 Be7 15.Nd2 g6 16.Bh8 Nh6 17.Bb2 Bd6 18.Qh3 g5 19.Qh6 Ke7 20.Qh7 Ke6 21.Qg7 Kd5 22.Nf3 Kc6 23.c4 Kb6 24.Qf6 Ka5 25.Qd6 Ka4 26.Qc5 a6 27.Qb4 1–0. Fournier,Frederic (2000) – superman55 (1630), Echecs21 (1/1), 2003.

3.a4 a5 4.b5 Bd7 5.e3 (5.e4 Nf6 6.Nc3 g6+=) 5...Nf6= 6.Nf3 h6 (6...e5 7.Be2=) 7.d4 b6 8.Bd3 g5 (8...e6 9.0–0+=) 9.0–0 Bg4 (9...cb5 10.ab5 g4 11.Nfd2+–) 10.h3 (10.d5 cb5 11.Bb5 Nbd7 12.Bf6 ef6+–) 10...Bd7 11.c4 (11.d5!? cb5 12.Bf6 ef6 13.Bb5+–) 11...g4 12.hg4 Bg4 (12...cb5 13.ab5 Bg4 14.e4+=) 13.e4 (13.d5 cd5 14.Bf6 ef6 15.cd5 Nd7+–) 13...Rg8 14.e5 (14.Na3 Nh5 15.Bc1 Bg7=) 14...de5= 15.de5 Nh5 (15...Nfd7 16.Bd4=) 16.Be4+= Bg7 (16...Qc7!?+=) 17.Qd8+– Kd8 18.bc6 Kc7 (18...Na6!?+–) 19.Nc3+– f5? (19...Nc6 20.Nd5 Kb8 21.Nb6 Ra6+–) 20.Nd5 Kd8 (20...Kc6 21.Ne7 Kd7 22.Nf5 Ra7+–) 21.c7 Ke8 (21...Kd7 22.Nb6 Kc7 23.Na8 Kc8+–) 22.c8Q Kf7 23.e6 Kg6 24.Ne7 (24.Ne7 Kh7 25.Qg8) 1–0. onur604 (2320) – ChessMateFriend (2025), lichess.org, 2020.

3.a4 b6 4.e3 Na6 (4...e5 5.Nf3=) 5.b5+= Nc7 6.c4 (6.bc6 e5+=) 6...c5 7.Nf3 Bb7 8.Be2 Qd7 (8...e5 9.d3+=) 9.0–0 0–0–0 (9...a6 10.d4+=) 10.d4 (10.a5 Nf6+–) 10...e6 (10...cd4!? 11.ed4 Bf3 12.Bf3 d5+–) 11.a5+– Ne7 (11...Nf6 12.ab6 ab6 13.Qa4+–) 12.ab6 ab6 13.dc5 dc5 14.Qa4 (better 14.Qd7 Rd7 15.Ne5+–) 14...Kb8? (better 14...f6+–) 15.Qa7 (15.Rd1 Qe8 16.Rd8 Qd8 17.Qa7 Kc8 18.Qb6 Nf5+–) 15...Kc8 16.Ne5 Qe8 17.Bf3 (worse 17.Qb6 Na8 18.Qa7 Nc7+–) 17...Ned5 (17...Bf3 18.Nf3 Rd6+–) 18.cd5 ed5 (18...Nd5 19.Nc3 Qe7 20.Nc4+–) 19.Nc3 (better 19.Nc4 Nb5 20.Bg4 f5 21.Bf5 Rd7 22.Nb6 Kc7+–) 19...f6 (19...Qe6 20.Nc4! Rd6 21.Rfc1+–) 20.Nc6! Bc6 (20...Qc6 21.bc6) 21.bc6 Qc6 22.Rfd1 (better 22.Bg4 Rd7 23.Nd5 Qd5+–) 22...Bd6 (22...h5+–) 23.Nd5 (better 23.Bg4 Rd7 24.Na4+–) 23...Nb5 (23...Nd5 24.Bg4 Rd7 25.Rd5 f5 26.Bf5 Kd8 27.Qd7 Qd7 28.Bd7 Kd7+–) 24.Nb6 Qb6 25.Qb6 Bc7 (25...Kd7 26.Ra7! Ke6 27.Rg7 Nd4 28.Qb3 c4 29.Qc4 Kf5 30.Bg4 Ke5 31.Qd4) 26.Ra8 (26.Qb7) 26...Bb8 27.Qc6 (27.Qc6 Nc7 28.Qb7; 27.Rb8) 1–0. RichardSommer (2045) – ShamelAhmad (1995), lichess.org, 2020.

3.a4 Qb6 4.b5 a5 5.e3 Nd7 (5...e5 6.d4=) 6.d4 Ngf6 (6...e5 7.Nd2+=) 7.Nf3 h6 (7...e6 8.c4+=) 8.Bd3 g5 (8...cb5 9.Bb5 Qc7 10.0–0+=) 9.0–0 Bg7 10.e4 (10.Nbd2 c5+=) 10...Nh5 11.Nbd2 (11.Na3 Nf4+=) 11...Nf4 12.Nc4 White prepares e5 12...Qa7 (12...Qc7 13.Ne3+=) 13.e5 (13.Ne3 Nc5 14.dc5 Bb2+=) 13...d5 (13...Nd3 14.Qd3 g4 15.Nfd2 de5 16.de5+–) 14.Ne3 Nb6 15.h4 (15.Bc1 Nd3 16.Qd3 cb5 17.Nd5 Nd5 18.Qb5 Bd7 19.Qd5 Rc8+–) 15...g4 (15...gh4 16.Nh4 Bf8 17.Bf5=) 16.Ne1 (16.Nh2 h5+=) 16...g3 (16...Nd3 17.Qd3 Be6 18.Qe2+=) 17.fg3+– Nd3 18.Qd3 Nc4 (18...Be6!?+=) 19.Nc4+– dc4 20.Qc4 Be6 21.Qe2 Rd8 22.Nd3 Qb6 (22...Bc4!? 23.bc6 bc6 24.Rab1+–) 23.Nc5+– Rg8 (23...Bc8 24.c4+–) 24.Ne6 fe6 25.Rad1 Kd7 (25...cb5 26.ab5 Kd7 27.c4+–) 26.Ba3 Rdf8 27.Rf8 Rf8 (27...Bf8 28.Bc5 Qc7 29.Rb1+–) 28.Qg4 Be5 (28...Bh8 29.Bc5 Qc7+–) 29.Bc5 Qc7 (29...Bc7 30.Qg7 Re8+–) 30.de5 Kc8 31.Qe6 Kb8 32.b6 Qc8 (32...Rd8 33.bc7 Kc7 34.Qe7 Rd7 35.Rd7 Kc8 36.Qd8) 33.Qe7 Re8 (33...Rh8 34.Qd6 Ka8 35.Qd2 Qc7 36.Qa5 Kb8 37.bc7 Kc8 38.Rd8 Rd8 39.cd8Q) 34.Qd6 Ka8 35.Qd2 (35.Qd2 Qc7 36.Qa5 Kb8 37.bc7 Kc8 38.Rd8 Rd8 39.cd8Q) 1–0. Anonymous – Anonymous, lichess.org, 2020.

3.a4 Qc7 4.e3 e5 5.b5 Nd7 6.c4 c5 (6...Ngf6 7.d4=+) 7.Nf3= a5 (7...Ngf6 8.Nc3=) 8.d4+= b6 9.de5 de5 10.Be2 (10.Ne5 Ne5 11.Qd5 Nc4 12.Bc4 Bb7+=) 10...Bb7 11.0–0 (11.Nc3 Ngf6=) 11...Ngf6 12.Nc3 0–0–0 (12...e4!? 13.Nd2 Qe5=) 13.Nd5 Nd5 14.cd5 Bd6 15.h3 (15.e4!?+–) 15...f6 (15...Nf6!? 16.Bc4 Qe7=) 16.e4+– (16.e4 g5 17.Rc1+–) 1–0. RichardSommer (2120) – tipsyknight (2215), lichess.org, 2020.

3.a4 Nf6 4.e3 g6 5.c4 Bg7 6.b5 Nbd7 7.Nf3 e5 8.Be2 0–0 9.0–0 Re8 10.h3 (10.d4 e4 11.Nfd2 a6+=) 10...Qe7 11.Nc3 d5 12.Qb3 (12.cd5 cd5 13.d4 e4+=) 12...cb5 (12...e4 13.Ne1=+) 13.ab5 dc4 14.Bc4 Nb6 (14...Nc5 15.Qa2 e4+=) 15.Ng5 (better 15.Ne5!? Nc4 16.Nc4+–) 15...Nc4=+ 16.Qc4 h6 17.Nf3 Be6 18.Qe2 Nd5 19.Nd5 Bd5 20.d4 Bf3 (20...e4 21.Ne5=+) 21.Qf3= ed4 22.Bd4 Bd4 23.ed4 Qd7 24.Rfd1 (24.Rfb1 a6=) 24...Qb5= 25.Rab1 Qf5 (25...Qc6 26.Qf4 g5=+) 26.Rb7 (better 26.Qf5 gf5 27.Rb7+=) 26...Qf3=+ 27.gf3 Reb8 28.Rd7 (28.Rb8 Rb8 29.Ra1 Rd8=+) 28...a5–/+ 29.Rc1 a4 30.Rcc7 a3 (30...Rc8!? 31.Rb7 Rf8=+) 31.Rf7= a2 32.Rg7 Kh8 33.Rh7 Kg8 34.Rhg7 Kh8 35.Rh7 Kg8 36.Rhg7 ½–½. RichardSommer (2085) – ysyh (2140), lichess.org, 2020.

3.b5 cb5 4.e3 a6 5.c4 b4 (5...bc4!? 6.Bc4 Nc6–/+) 6.Nf3= Nf6 7.Be2 (7.Bf6 ef6 8.d4 d5=) 7...g6 (7...e5 8.Qb3=+) 8.0–0 Bg7 9.d4 0–0 10.a3 ba3 11.Na3 Nc6 12.Nb5 Bf5 13.Nc3 White prepares d5 13...Rc8 14.d5 Na5 15.Qa4 b6 16.Nd4 Bd7 17.Qa2 e5 (better 17...Qc7!?–/+) 18.de6+= fe6 19.Ba3 (19.c5 Rc5 20.Ne6 Be6 21.Qe6 Kh8=) 19...Qc7 Increasing the pressure on the isolated pawn on c4 (19...e5 20.Nf3 Be6 21.Ng5 Bc4 22.Bc4 Nc4 23.Ne6=+) 20.Bb4 (20.c5 dc5 21.Ne6 Be6 22.Qe6 Rf7 23.Ba6 Re8=+) 20...Nc4 (20...Nc6 21.Nc6 Bc6 22.Qa6=+) 21.Qa6=+ Nd5 22.Nd5 ed5 23.Nb5 (better 23.Rfd1=) 23...Bb5–+ 24.Qb5 Qc6 (better 24...Ba1 25.Qd5 Qf7 26.Qf7 Kf7 27.Ra1 Rfe8–/+) 25.Qc6= Rc6 26.Bf3 (26.Ra6 d4 27.Rc1 Rfc8=) 26...Rf5 (26...Rf3 27.gf3 Ba1 28.Ra1 Kf7–/+) 27.Rfd1?? (better 27.Ra8 Kf7 28.Ra7 Kf8 29.h3+=) 27...Ba1–+ 28.Ra1 Ne5?? (better 28...b5–+) 29.Bd5+– Kg7 30.Bc6 Nc6 31.Bc3 (31.e4 Rf4 32.Bc3 Kg8+–) 31...Kh6 (31...Kf7 32.Kf1=) 32.g4 (32.e4!? Rc5 33.Bd2 Kh5 34.Ra3+=) 32...Rc5= 33.Bd2 g5 34.Rb1 Ne5 (34...b5=) 35.Kg2?? (35.Rb6!? Rc2 36.Rd6 Kg7 37.Bb4 Ng4 38.Rd2+–) 35...Rd5 (better 35...Rc2!? 36.Be1 Ng4=+) 36.Bc3+= Ng4 37.Rb6 Kh5 38.Bb4 (38.h3 Ne5 39.Bb4+=) 38...Nf6 (better 38...Rf5!? 39.Be1 d5=) 39.Bd6 Ne4 40.Bf8 (better 40.Bb4 g4 41.f3 gf3 42.Kf3 Ng5 43.Kf4+–) 40...Kg4?? (better 40...Rd2!? 41.Kf3 Rf2 42.Ke4 Rf8=) 41.h3 (better 41.f3 Kf5 42.fe4 Ke4 43.Bh6+–) 41...Kf5+– 42.f3 (better 42.Bb4 Rd3 43.Rb5 Kg6 44.Kf3+–) 42...Rd3?? (better 42...Rd2 43.Kg1 Rd1 44.Kh2 Rd2 45.Kg1 Rd1 46.Kg2 Rd2 47.Kg1=) 43.fe4 Ke4 44.Re6 Kd5 (44...Kf5 45.Re8+–) 45.Re7 Kc4 (45...h5 46.Bh6 g4 47.hg4+–) 46.Kf3 Kb3 (46...h5 47.Rc7 Kb3 48.Bh6+–) 47.Rb7 Kc2 48.Rc7 Rc3 49.Rc3 (49.Rc3 Kc3 50.e4+–) 1–0. BeepBeepImAJeep (2615) – skopje123 (2370), lichess.org, 2015.

3.b5 d5 4.e3 cb5 5.Bb5 Bd7 6.a4 Bb5 7.ab5 Qb6 8.Qg4 Qb5?? (8...Nd7 9.Bg7) 9.Qc8 1–0. Wall,Bill – Guest524476, playchess.com, 2012.

3.b5 e6 4.e3 Nf6 5.c4 Be7 6.a4 0–0 7.Nf3 Nbd7 8.Be2 e5 9.0–0 a6 10.d4 White gets in control 10...ab5 11.ab5 Ra1 12.Ba1 Nb6 (better 12...e4 13.Nfd2 cb5 14.cb5 d5=) 13.de5+– de5 14.Ne5 Be6 (14...Qc7!?+–) 15.bc6 bc6 16.Nc6 Qc7 17.Ne7 Qe7 18.Nd2 Rd8 19.Bd4 Qc7 (19...Nbd7 20.Qc2+–) 20.Qb3 Nbd7 21.h3 h5 (21...Nc5 22.Qb4 Nfd7 23.Rd1+–) 22.Rb1 Nc5 (22...Rb8 23.Qa2+–) 23.Qb6 Qb6 24.Rb6 Nce4 25.Ne4 Ne4 26.c5 Rc8 27.c6 Nd6 (27...Bd5 28.f3 Ng3 29.Bd3+–) 28.Ba6 Rc7 (28...Re8 29.c7 Nc8 30.Rb8+–) 29.Be5 Rc6 (29...Bd5 30.Bd6 Rc6 31.Rb8 Kh7 32.Bd3 g6 33.Rd8+–) 30.Rc6 (30.Rc6 Nf5 31.Bd3+–; 30.Bd6?? Rb6 31.Be2 Rd6 32.Bh5 Rd2–+) 1–0. BeepBeepImAJeep (2740) – taulajoe (1920), lichess.org, 2016.

3.c3 a6 4.e3 (4.d4 Nf6=) 4...Nf6 5.d4 Nbd7 6.Bd3 (6.c4 e5=) 6...b5 (6...e5!?+=) 7.Nf3= Bb7 8.a3 (8.0–0 c5+=) 8...g6 (8...e5 9.Bf5=) 9.0–0 Bg7 10.Nbd2 0–0 11.Qc2 e5 (11...c5 12.dc5 dc5 13.c4+=) 12.de5 de5 13.Ne4 (better is 13.c4!? Qe7 14.e4+=) 13...Ne4+= 14.Be4 Rb8 (better is 14...f5!? 15.Qb3 Kh8+=) 15.Rad1= c5 (15...Qe7 16.Qe2=) 16.Bb7 Rb7 17.Rd2 (17.Rd6 Qe7 18.Ra6 e4+=) 17...c4 18.Rfd1 Rc7 (better is 18...Qe7=) 19.Rd7?? (better is 19.e4+=) 19...Rd7–+ 20.Rd7 (20.Re1 Qf6–+) 20...Qd7 21.g3 Rc8 22.Ne1 Kh8 23.f3 f5 24.Kf2 e4! 25.f4 Rd8 26.Kg2 Qc6 27.h3 Rd3! 28.Nd3 cd3 29.Qd2 Qc4 30.Kf2 h5 31.Bc1? Kh7 32.Qe1?? Bh6 33.Kg2 Bg7 34.Kf2 Qc3 35.Qc3 Bc3 36.Kf1 d2 37.Bd2 Bd2 38.Ke2 Bb4! 39.ab4 Kg7 40.g4? Kf6 41.gh5 gh5 42.h4 (42.h4 Ke6 43.Kd2–+). Fournier,Frederic (1930) – maxoflaxia (1660), Active, 2009.

3.c3 Qc7 4.h4 h5 5.Nf3 Nf6 6.d3 Qb6 (6...Bg4 7.Nbd2=+) 7.Nbd2= Ng4 8.d4 e5 9.e3 (9.Nc4 Qc7 10.e4 Be7+=) 9...Be7 10.Nc4 Qc7 11.de5 de5 12.e4 (12.Ng5!?+=) 12...b5 13.Na5 (13.Ne3!? 0–0 14.Bd3=+) 13...Qb6–/+ 14.Qc2 0–0 15.g3 (15.Bd3 c5 16.0–0–/+) 15...f5 (better 15...Na6 16.a3 c5–/+) 16.0–0–0?? (better 16.Bh3 c5 17.0–0=+) 16...Nf2–+ 17.Rh2 (17.Bg2 Qe3 18.Kb1 Nh1 19.Bh1 Qe4 20.Qe4 fe4 21.Ne5 e3 22.Nac6 Nc6 23.Nc6 Bd6 24.Bd5 Kh8–+) 17...Nd1 (better 17...Qe3 18.Kb1 Nd1 (18...Qf3?! 19.Rf2 Qg3 20.c4–/+) 19.Qb3 Kh7 20.Qd1 fe4 21.Ng5 Kg8–+) 18.Kd1 (18.Qd1 fe4 19.Ne5 Bf6–+) 18...Rd8 (better 18...fe4 19.Qe4 Rf3 20.Qe1–+) 19.Kc1 (19.Rd2 f4 20.Qb3 Kh7 21.Rd8 Qd8 (worse 21...Bd8 22.Be2 Bg4 23.c4 fg3 24.c5–+) 22.Kc2 Bg4–+) 19...f4 (19...Qe3!? 20.Nd2 Qg3 21.Rh1 Bh4 22.Nab3–+) 20.Ne5 (20.Be2 c5 21.gf4 ef4 22.Kb1–+) 20...fg3 21.Qb3 (21.Rd2 Rd2 22.Qd2 Bh4–+) 21...Kh7 22.Rg2 (22.Re2 g2 23.Rg2 Qe3 24.Kb1 Qe4 25.Nd3 Rd3 26.Bd3 Qd3 27.Qc2–+) 22...Bh4 (better 22...Qe3 23.Kb1 Qe4 24.Qc2 Rd1 25.Bc1 Qc2 26.Kc2 Rf1 27.Rg3 Bf5 28.Kb2 Bh4–+) 23.Nf7 (23.Qf7 Qe3 24.Kc2–+) 23...Qe3 24.Kb1 Qe4 25.Qc2 Qc2 (better 25...Rd1! 26.Bc1 Bf5 27.Qe4 Be4 28.Kb2 Rf1 29.Rg3 Rf7 30.Rh3–+) 26.Kc2 (26.Rc2 Rd1 27.Rc1 Rd2–+) 26...Rf8 (better 26...Bf5!? 27.Kb3 Be6 28.c4 Bf7 29.Bc3–+) 27.Bd3 g6 (better 27...Kg8 28.Ne5 Bh3 29.Rg1–+) 28.Ne5 Bf5 29.Bf5 (29.c4 Nd7 30.Nd7 Bd7–+) 29...gf5 (29...Rf5 30.Nd3 Rf2 31.Nf2 gf2 32.Rf2 Bf2 33.Nb3–+) 30.Nac6 (30.Nf3 Bf6 31.Rg3–+) 30...Nc6 31.Nc6 f4 32.Nd4 (32.Rd2 Bf6 33.Rd7 Kg6–+) 32…f3 (32...f3 33.Nf3 Rf3–+) 0–1. beatmeeasy (1915) – blackgam (1875), lichess.org, 2020.

3.c3 e5 4.d4 +=.

3.Nc3 a6 4.Nf3 Nf6 (4...e5 5.e4=) 5.e4 e5 6.d4 Nbd7 7.Be2 Be7 8.0–0 0–0 9.a4 (9.a3 Re8+=) 9...b6 (9...Re8 10.a5=) 10.b5 Bb7 (10...Qc7 11.Qd3=) 11.Re1 (11.bc6 Bc6 12.d5 Bb7=) 11...Qc7= 12.Bd3 (12.bc6 Bc6 13.Qd3=) 12...Rad8 (12...ab5!? 13.ab5 Ra1 14.Ba1 c5 15.de5 de5+=) 13.ba6+– Ba8 (13...Bc8 14.d5+–) 14.Qd2 (14.Rb1 Rfe8+–) 14...Qa7 (14...Rfe8 15.Rab1+–) 15.Nd1 ed4 16.Nd4 Ne5 17.Nf5 Nd3 (17...Rfe8 18.Qg5 Bf8 19.f4+–) 18.Qd3 (better 18.Qg5 Ne8 19.Ne7 (19.Qe7?! Rd7 20.Qd7 Qd7 21.cd3 Qa7=) 19...Kh8 20.cd3+–) 18...c5?? (better 18...Ne8+–) 19.Qg3 (19.Ne7?! Qe7 20.Ne3 Rfe8+–) 19...g6 (19...Nh5 20.Qg4 (20.Ne7?! Qe7 21.Qg4 g6+–) 20...f6 21.Qh5+– (worse 21.Ne7 Qe7 22.Qh5 d5+–)) 20.Nh6 Kg7 21.Ne3 (better 21.Qg5 d5 22.Nf5 Kg8 23.Ne7 Qe7 24.Bf6+–) 21...Be4 (21...Rfe8 22.Neg4 Kf8 23.Bf6 c4+–) 22.Nef5 Bf5 23.Nf5 Kh8 24.Re7 Qa6 (24...Rg8 25.Qg5 Qe7 26.Bf6 Rg7 27.Bg7 Kg8 28.Ne7 Kg7 29.Nf5 Kf8 30.Qd8) 25.Bf6 (25.Bf6 Kg8 26.Nh6) 1–0. michaelbuss (2800) – countryjmp (1805), ChessWorld.net, 2012.

3.Nc3 Nd7 4.Nf3 h6 (4...Ngf6 5.e4=) 5.e3 (5.e4 Ngf6+=) 5...g5 (5...Ngf6 6.a3=) 6.h3 Bg7 7.Bd3 Nf8 8.0–0 (8.Rb1 Nf6+=) 8...Ng6 9.b5 (9.Nd4 Ne5 10.Be2 Nf6=) 9...g4 10.hg4 Bg4 11.bc6 (11.Bg6 fg6 12.d4 e5=) 11...bc6=+ 12.Rb1 Nf6 13.Ne4 e5 14.Ba3 (14.Ng3 Qd7 15.Be2 Rg8=+) 14...Ne4–/+ 15.Be4 Qd7 16.Bd3 0–0 (16...Rg8 17.Rb4=+) 17.c3 c5 18.Re1 (18.Be2 e4 19.Nd4 Be2 (worse 19...cd4 20.Bg4 f5 21.Bh5+–) 20.Ne2 Ne5=+) 18...Rab8 19.Qc2 (better 19.Rb3!?–/+) 19...Bf3–+ 20.Bf5 Rb1 (20...Qc6 21.Bg6 Bg2 22.Bf5–+) 21.Rb1–/+ (21.Bd7?? Re1 22.Kh2 Bd1–+) 21...Qc6 22.gf3 Nh4 23.Bc1 Qf3 24.Be4 Qh3 25.Rb7?? (25.Qd3–+) 25...Kh8 26.f4 (26.Qb3 c4! 27.Qc4 Bf6–+) 26...Rg8 27.Kf2 Qh2 28.Ke1 Bf8 29.Qd3 Rg1 30.Qf1 Rf1 (30...Ng2 31.Bg2 Qg2 32.Qg1 Qg1 33.Ke2 Qg2 34.Kd1 Qb7 35.fe5 de5 36.Kc2–+) 31.Kf1 f5 32.Rf7 fe4 33.Rf8 (33.fe5 Nf3 34.Rf8 Kg7 35.Rg8 Kg8 36.Bb2 Qg1 37.Ke2 Qe1) 33...Kg7 34.fe5 (34.Rg8 Kg8 35.d3 ed3 36.fe5 Qe2 37.Kg1 Qg2) 34...Kf8 35.ed6 (35.d4 ed3 36.ed6 Qe2 37.Kg1 Qg2) 35...Qh1 36.Ke2 Qf3 37.Ke1 Ng2 0–1. Pierre – GuestDozen, internet, 2020.

3.c4 Na6 4.b5 Nc7 5.a4 c5 (5...Nf6 6.Nf3=) 6.e3 f6 (6...Nf6 7.Be2=) 7.Nf3 g6 (7...e5 8.d4+=) 8.Be2 Bg7 9.0–0 Nh6 10.d4 Nf7 11.Nc3 cd4 12.Nd4 (12.ed4 d5 13.cd5 Nd5 14.Nd5 Qd5 15.Rc1+–) 12...b6 (12...e5!? 13.Nb3 f5+=) 13.Nc6 Qd7 14.Bf3 Bb7 15.a5 0–0? (15...ba5 16.Ra5 Ng5 17.Bd5 Nd5 18.cd5+– (18.Nd5?! Bc6 19.bc6 Qc6=)) 16.Nd4?? (better 16.Ne7 Qe7 17.Bb7+–) 16...Bf3+= 17.Qf3 e5 (17...e6!?+=) 18.Nc6+– f5 (18...ba5 19.Nd5+–) 19.ab6+– ab6 20.Ra8 (20.Na4!? Ng5 21.Qe2+–) 20...Ra8+– 21.Nd5 e4 (21...Nd5 22.Qd5 (22.cd5?! e4 23.Qe2 Ra2=) 22...Qe8 23.Bc3+–) 22.Qe2 (22.Nce7!? Kf8 23.Bg7 Kg7 24.Nf5 gf5 25.Qg3 (worse 25.Nb6 ef3 26.Nd7 Rd8–/+) 25...Kf8 26.Nb6+–) 22...Nd5+= 23.Bg7 Kg7 24.cd5 Re8? (better 24...Ne5!?+=) 25.Qb2 Ne5 (25...Kg8 26.Ra1 Nd8 27.Qd4 Nc6 28.dc6+–) 26.Qd4 (26.Ra1 Kh6 27.Ra7 Qc8+–) 26...Qc7 (26...Qf7 27.Rd1+–) 27.Ra1 Kh6 28.h3 Rf8 29.Ra6 Rf7 (29...Nd7 30.Ra7 Qc8 31.f3+–) 30.Qb6 Qd7 (30...Qb6 31.Rb6 Nc4 32.Rb8+–) 31.Ne5 (31.Qb8 Qc7 32.Qh8 Nc6 33.dc6 d5+–) 31...de5 32.Qe6 (32.Qc6 Qb7+–) 32...Re7? (32...Qb5 33.Qf7 Qa6 34.Qf8 Kh5 35.d6+–) 33.Qd7?? (better 33.Qc6 Qb7 34.Rb6+–) 33...Rd7+– 34.d6 Kg7 35.Rc6 (35.b6 Kf6+–) 35...Kf6+= 36.b6 Ke6 37.Kf1 Rd6?? (37...Kd5 38.Rc8=+) 38.Rc7 (better 38.b7 Rc6 39.b8Q+–) 38...Rb6=+ 39.Rh7 Kf6 (39...Rb1 40.Ke2–/+) 40.Kg1 (40.g3 Rb1 41.Kg2 Rb2=+) 40...Rb2 (40...Rb1 41.Kh2=+) 41.Rc7 f4 42.Rc1 fe3 (42...Rb3!?=+) 43.fe3= Kf5 44.Rf1 (44.Rf1 Ke6 45.g4=). BeepBeepImAJeep (2570) – Bussia (1830), lichess.org, 2018.

3.c4 f6 4.a3 e5 5.e3 a6 (5...a5 6.b5=) 6.Nf3 Ne7 7.Be2 Nd7 (7...e4 8.Nd4+=) 8.0–0 g6 (8...d5 9.d4 e4 10.Nfd2+=) 9.Nc3 Bg7 10.d4 0–0 11.de5 de5 12.Qc2 h6 (12...b6 13.Rfd1+/–) 13.Rad1 b5 (13...a5 14.b5+/–) 14.cb5 ab5 15.Rd2 Bb7 (15...f5 16.a4+/–) 16.Rfd1 Bc8 17.Ne4 Qe8?? (better is 17...Ra7+/–) 18.Nd6+– Qd8 19.Nc8 Nd5 (19...Qc8 20.Rd7 Nd5+–) 20.Qc6 Rc8 (20...Qc8 21.Qd5 Rf7 22.Qb5 Nf8+–) 21.Qd5 Kh8 22.Qd7 Qd7 23.Rd7 1–0. Fournier,Frederic – The Bug, Partie evaluee, 2007.

3.c4 h6 4.e3 e5 5.Nf3 Nf6 6.Be2 g5 (6...e4!? 7.Nd4 d5=) 7.d4+= Bg4 (7...e4 8.Nfd2+=) 8.de5 de5 (8...Bf3!? 9.Bf3 de5 10.Qd8 Kd8+=) 9.Qd8+– (9.Be5?! Bb4 10.Nbd2 Nbd7=) 9...Kd8 10.Ne5 (10.Be5?! Bb4 11.Bc3 Bf3 12.Bf3 Na6=) 10...Be2? (better 10...Bb4 11.Nd2 Be2 12.Nf7 Ke7 13.Nh8 Bc4 14.Ng6 Ke6+–) 11.Nf7+– (11.Ke2?! Ke7+–) 11...Ke7 12.Nh8 Bc4 (12...Bh5+–) 13.Ng6 Kf7 14.Ne5 (worse 14.Nf8 Nd5 15.Na3 Ba2 16.Ra2 Nb4+–) 14...Ke6 15.Nc4 Ne4 (15...Bb4 16.Ke2+–) 16.0–0 (16.a3!? b5 17.Na5 c5+–) 16...b5 (16...Bb4 17.f4+–) 17.Ne5 Bd6 (17...Bb4 18.Rc1+–) 18.Nf3 (18.Nd3 a5 19.ba5 Ra5+–) 18...g4 (18...Bb4 19.Nd4 Kf7 20.Rc1+–) 19.Nd4 Kd7 20.Rd1 Na6 21.Nf5 Kc7 (21...Ke6 22.Nh6 Nb4 23.Rd4 Nf2 24.Kf2 g3 25.hg3 Rf8 26.Ke2+–) 22.a3 (22.Nd6 Nd6 23.Be5 Rd8+–) 22...g3 (22...Rf8 23.Nd6 Rd8 24.Be5 Nd6 25.Nc3+–) 23.hg3 Rf8 (23...Bf8 24.f3 Ng5 25.Nc3+–) 24.Nd6 Nd6 25.Be5 Re8 26.Bd6 (26.Bd6 Kb6 27.Nc3+–) 1–0. DEFFM – GuestBKLC, freechess.org, 2017.

3.d3 Nf6 4.e4 h6 5.e5 (5.Nf3 a5=) 5...de5=+ 6.Be5 g5 (6...Nbd7 7.Bc3=+) 7.Nf3 Bg7 8.Be2 Qb6 (8...g4 9.Nh4=) 9.a3 g4 10.Nfd2 h5 11.0–0 Nbd7 12.Bb2 h4 (12...g3 13.hg3 h4 14.gh4 Rh4 15.Nf3+=) 13.Nc4 Qc7 14.Bg4 Ng4 15.Qg4 Bb2 16.Nb2 Nf6 17.Qf3 (better 17.Qd4!?+–) 17...Ng4= 18.g3 (18.Qh3!?=) 18...hg3–/+ 19.fg3? (19.Qg3!? Qd7 20.Nc4–/+) 19...Be6 (better 19...Qb6!? 20.Rf2 Nf2 21.Qf2 Qf2 22.Kf2 Rh2 23.Ke3 Rc2 24.Nc4–+) 20.h4 0–0–0 21.Nc3 Rdg8 (21...Rh4 22.Qf4 Qb6 23.d4–+) 22.Ne4 (22.Qf4!? Ne3! 23.Qc7 Kc7 24.Kf2 Nc2 25.Rac1 Na3 26.Rfe1–/+) 22...Rh4 23.Nd1?? (better 23.Qf4 Rh2 24.Qc7 Kc7 25.Rf2 Rf2 26.Nf2–+) 23...Nh2 24.Qg2 (24.Qf2 f5 25.Ndc3 fe4 26.Ne4 Nf1 27.Rf1–+) 24...Nf1 25.Qf1 (25.Kf1 Bh3 26.Qh3 Rh3 27.Ndf2–+) 25...Rg3 26.Ng3 Qg3 27.Qg2 Qg2 (27...Qe1 28.Qf1 Rg4 29.Kh2 Qg3 30.Kh1 Bd5 31.Qf3 Bf3) 28.Kg2–/+ Bh3 29.Kg3 Rh6 30.Ne3 Be6 31.Rg1 Rg6 32.Kf2 Rg1 33.Kg1 Kd7 34.Kf2 Kd6 35.Kg3 Ke5 36.Nc4?? (36.c3!?–/+) 36...Kd4 (better 36...Bc4 37.Kf3–+) 37.Nd2? (37.Na5–+) 37...Kc3 38.Ne4 Kc2 39.Kf4 Kd3 (better 39...b6 40.Ke3–+) 40.Ng5 (40.Nc5 Kc4 41.Nb7–+) 40...Bd5 41.Nf7 (41.Nh7–+) 41...Bf7 42.Ke5 Bc4 43.b5 (43.Kf5 Kc3–+) 43...Kc3 (better 43...Bb5 44.Ke6 c5 45.Ke7 c4–+) 44.bc6 bc6 45.Kf5 Bb5 (better 45...Bd3 46.Ke6 c5 47.Kd5–+) 46.Kg6 1–0. alessandrocarvalhaes (1830) – sharap1985 (1755), lichess.org, 2020.

3.e3 b5 4.a4 Bb7 (better is 4...ba4!? 5.Ra4 e5+=) 5.ab5+/– e5 6.d4 e4 7.bc6 Nc6 8.c4 Qd7 9.b5 Nce7 10.Nd2 f5 11.d5 Nf6 12.Bf6 gf6 13.Qh5 Ng6 14.Ne2 Kd8 (14...Bc8+–) 15.Nd4 Ne7 16.Qh4 (better is 16.Ne6 Kc8+–) 16...Bg7 (16...Ke8+–) 17.Ne6 Qe6 (17...Kc8 18.Ng7 Nd5+–) 18.de6 Kc7 (18...Ng6 19.Qh3 f4 20.Qf5 fe3 21.Ne4+–) 19.c5! dc5 (19...Ng6 20.Qh5 dc5 21.Qf5+–) 20.Qf4 Kc8 21.Qd6 Bf8 22.Nc4 Nd5 23.Qd7 Kb8 24.Na5 Ne7 25.Qb7 1–0. pierre – rla, internet, 2007.

3.e3 Be6 4.a4 (4.Nf3 Bf5=) 4...Nd7 (4...Bf5 5.Nf3=) 5.Nf3 Ngf6 6.c4 (6.b5 Bg4=) 6...g6 (6...Bg4 7.h3 Bf3 8.Qf3=) 7.b5 (7.Nd4 Bg7+=) 7...c5 8.Nc3 (8.Ng5 Bg7=) 8...Bg7 9.Be2 0–0 10.0–0 Nb6 11.d3 d5 (11...a5 12.ba6 Ra6 13.Qb3+=) 12.a5+/– Nc8 13.Qb3 d4 (13...a6 14.Nd5 Nd5 15.Bg7 Kg7 16.cd5 Qd5 17.Qd5 Bd5 18.Rfc1 ab5 19.Rc5 Bf3 20.Bf3+=) 14.ed4 (14.Na4 Qc7+/–) 14...cd4 15.Nb1 Ng4 16.Nbd2 (16.a6 b6+/–) 16...Nh6 (16...Bf5 17.a6 b6 18.h3+/–) 17.Ne4 Nf5 (17...Bf5 18.Rfe1+=) 18.Nc5+/– Ncd6 (18...Bd7!?+/–) 19.Ne6+– fe6 20.c5 Nf7 21.Qe6 Qe8 (21...a6 22.c6 bc6 23.b6+– (23.Qc6?! ab5 24.a6 b4+/–)) 22.c6 bc6 23.bc6 Rc8 24.Rac1 Qd8 25.Rc5 Qd6 26.Qc4 Rc7 27.Rc1 Rfc8 28.Ng5 Qf6 29.Ne6 N7d6 30.Qb3 Qf7 31.Bf3 Nh6 32.Bd5 Ne8 33.Ng7 Ng7 34.Bf7 Nf7 35.Bd4 Ne8 36.Ba1 Rd8 37.Qc3 Rd6 38.Rb1 Rd8 39.Rb7 Rdc8 40.Rc7 Rc7 41.Rb5 (41...Rc8 42.Rb7+–) 1–0. O'Harney,Robert – Ball,Anthony, Brampton op, 2000.

3.e3 h6 4.c4 Nf6 5.a4 (5.d4 Bf5=) 5...g5 (5...e5 6.d4=) 6.b5 Bg7 7.Nc3 g4 8.Nge2 h5 9.d4 a6 10.Nf4 0–0 (10...ab5 11.ab5 Ra1 12.Qa1=) 11.Bd3+= e5 12.de5 (12.Nfe2 ab5 13.ab5 Ra1 14.Qa1 Be6+=) 12...de5 13.Nfe2 ab5 14.ab5 (14.cb5 cb5 15.Bb5 Nc6=) 14...Ra1 15.Ba1 Be6 16.Qc2 Nbd7 17.Nc1 Nc5 18.Be2 cb5 19.cb5 Qc7 20.0–0 h4 (20...Nce4 21.b6 Qc6 22.Nd3 Nc3 23.Qc3 (23.Bc3?? Nd5–+) 23...Qc3 24.Bc3–/+) 21.Na4 Rc8 22.Nc5 Qc5 23.Qc5 Rc5 24.Nd3 Rc2 25.Bd1 Rd2 26.Ne5 Nd7 27.Nd7 Bd7 (worse 27...Ba1 28.Nc5 Bc4 29.Re1+=) 28.Bg7 Kg7 29.b6 (29.Re1 Rb2=+ (worse 29...Bb5 30.Bg4 Bc4 31.Rb1+=)) 29...Bb5 (29...Rb2!?=+) 30.Re1= (worse 30.Bg4 Bf1 31.Kf1 Rb2–/+) 30...Bd7 31.f3 gf3 (better 31...g3!?=+) 32.Bf3+– (32.gf3?! Rb2=) 32...Rb2 33.Bb7 Rb6 34.Bf3 h3 (34...Rb2!?+=) 35.gh3 Bh3 36.Kf2 Rb2 37.Kg3 Be6 38.h4 Rb5 39.Kf4 Rb4 40.Kg3 (40.e4 f5+–) 40...Rb3 (40...Rb5 41.Rd1 Kf6+–) 41.Rg1 Kh6 42.Kf4 Rb4 43.e4 f5 44.h5 (44.Rg5!?+–) 44...fe4+= 45.Rg6 Kh7 46.Be4 (46.Bd1 Bd7+=) 46...Bd5= 47.Re6 Re4 48.Re4 Be4 49.Ke4 Kh6 50.Kf3 Kh5 ½–½. BeepBeepImAJeep (2565) – cresta (2370), lichess.org, 2018.

3.e4 Nd7 4.Bc4 e6 5.Qh5 (5.Nf3 Ngf6 6.Bd3 d5=) 5...Ngf6=+ 6.Qe2 b5 (6...d5 7.e5 Ng8 8.Bb3=+) 7.Bb3=+ Be7 (7...a5 8.ba5 Nc5 9.d4 Qa5 10.Bc3 Nb3 11.ab3 Qa1 12.Ba1 Ra1 13.Qd1 Ne4 14.Ne2=+) 8.d3 (8.Nf3 a5 9.ba5 0–0=+) 8...0–0 9.a3 Bb7 10.Nf3 Rc8 11.Nbd2 c5 12.bc5 Nc5 13.Ba2 (13.0–0 a6=) 13...d5 (13...Qa5 14.0–0=+) 14.e5 Nfd7 15.d4 Ne4 (15...Na4 16.Bc1 Nc3=+) 16.Ne4 (better 16.Qb5 Nd2 17.Nd2 Rc2 18.Bb1=+) 16...de4–/+ 17.Ng1 a6 18.Bb3 Nb6 19.Nh3 h6 (19...Nc4 20.Bc4 Rc4 21.0–0–/+) 20.0–0 Bd5 21.Rac1 (21.Rfb1 Nc4 22.Nf4 Re8=+) 21...Bg5 (21...Nc4 22.c3–/+) 22.Rcd1 (22.Rb1=+) 22...f6 (22...Nc4!? 23.Ng5 Nb2 (23...hg5?! 24.Bc1=) 24.Ne4 Nd1 25.Rd1 Be4 26.Qe4 Qa5–/+) 23.Rfe1 (23.Ng5 hg5 24.ef6 gf6=) 23...Qc7 24.Ng5 hg5 25.Qg4 Nc4 26.Bc4 Qc4 27.c3 Kf7 28.Qh5 g6? (better 28...Ke7=) 29.Qh7+– Ke8 30.Qg6 Rf7 (30...Kd8 31.Qg7 Ke8 32.ef6+–) 31.ef6 Qc7 32.Qg5 Kd7 33.Qg6 (33.a4 ba4 34.Ra1 Rcf8+–) 33...Kc6 (33...Rcf8 34.Rd2+–) 34.Re3 (34.Bc1 Rh8 35.h3 Rhf8+–) 34...Rh8 35.h3 Qd8?? (better 35...Rhf8 36.Qg3 Qg3 37.Rg3 Rf6+–) 36.Qf7 1–0. alessandrocarvalhaes (1930) – Mahaon78 (1885), lichess.org, 2020.

3.e4 e5 (--> 1.b4 e5 2.Bb2 d6 3.e4 c6).

3.e4 f5 4.Bd3 (4.e5=) 4...Nf6 (better is 4...fe4!? 5.Be4 Nf6 6.Bf6 ef6 7.Qh5 Kd7=) 5.ef5+/– e6 6.fe6 Be6 7.Bf5?? (better is 7.Ne2+/–) 7...Bf5–+ 8.Qe2 Be7 (8...Qe7 9.d3–+) 9.Bf6 gf6 10.Nf3 Rg8 (10...Bc2 11.d3 Bb1 12.Rb1–+) 11.0–0 Bh3 (11...Bc2?! 12.Qc4 d5 13.Qc2=) 12.Ne1 d5?? (better is 12...Qd7–+) 13.Qh5+/– Kf8 14.Qh3 Bd6 15.Qh7 Na6 16.a3 c5? 17.Qb7 f5?? 18.Nf3 Qf6 19.Qa8 Kf7 20.Qa7 Kf8 21.d4 cd4 22.Qa8 Nb8 23.Qd5 d3 24.c3 Nd7 25.g3 Nb6 26.Qd3 Na4 27.Nd4 Nb2 28.Qe2 Be5 29.Qb2 f4 30.Kg2 fg3 31.fg3 Bf4 32.Ne2 Qc6 33.Rf3 Rg4 34.c4! Qc4 35.Nf4 Kf7 36.Nc3 Kf6 37.Ncd5 Kg5 38.Qf6 1–0. 73DADDELDU37 – Hobbykegler, mySchach.de, 2005.

3.e4 Nf6 4.Nc3 e5 5.Nf3 Qb6 6.a3 Be7 7.d4 ed4 8.Qd4 0–0 9.Be2 c5 10.Qd3 cb4 11.Na4 Qc7 12.ab4 Nc6 13.c3 a6 14.Qe3 Bd8 15.Bc1 Re8 16.Nd2 d5 17.f3 d4 18.Qd3 dc3 19.Qc3 Be7 20.Bb2 Bb4 21.Qe3 Qa5 22.Nc3 1–0. Luzuriaga,Norberto Horacio – Pleschke,Helmut, email, 2000.

3.Nf3 e5 (--> 1.b4 e5 2.Bb2 d6 3.Nf3 c6).

3.Nf3 Bg4 4.e4 e5 5.Be2 Nf6 6.d3 Be7 7.a3 0–0 8.Nbd2 Nbd7 9.c3 Qc7 10.Qc2 d5 11.Nb3 Rac8 12.Qd2 (12.0–0 c5=+) 12...Rcd8 (12...de4 13.de4 Ne4 14.Qe3–/+) 13.Qc2 Rc8 14.0–0 (14.Qd2 de4 15.de4 Ne4–/+) 14...de4 15.de4 Nb6 (15...Rfd8 16.c4=) 16.c4 Rfd8? (better 16...Nbd7=) 17.Be5+– (17.Ne5?! Be2 18.Qe2 Na4+=) 17...Qd7 18.Rfd1 Qe6 (better 18...Qe8+–) 19.Bc3?? (19.Nbd4 Rd4 20.Bd4 (20.Nd4?! Qe5 21.Bg4 Ng4=) 20...Qe4 21.Qe4 Ne4 22.h3+–) 19...Bf3 (19...Qe4 20.Bd3 Rd3 21.Rd3 A) 21...Nc4? 22.Re1 Qg6 23.Nh4+– (23.Re7 Bf3 24.g3 Nd5 25.Rb7 Be4–+); B) 21...Bf5=) 20.Bf3 Nc4 (20...Na4!? 21.Bd2 b5+–) 21.Nd4+– Rd4 22.Bd4 (worse 22.Rd4 c5 23.bc5 Bc5+–) 22...Ne5 23.Be5 (23.Be2 c5 24.bc5 Nc6+–) 23...Qe5 24.Re1 Bd6 25.g3 Qg5?? (25...a5 26.Qb3+–) 26.Qc1 (26.e5 Be5 27.h4 Qh6 28.Re5 Nd7+–) 26...Qg6?? (better 26...Qe5+–) 27.e5 Bb4 (27...Bc7 28.ef6 Qf6+–) 28.ab4 (28.ef6?! Be1 29.Qe1 Qf6+–) 28...Ng4 (28...Ne8 29.Ra7 Rc7 30.Qc4+–) 29.Qf4 Nh6 30.Be4 Qe6 31.Rad1 (better 31.Ra7 Qd7+–) 31...g6 (31...Re8 32.Qd2+–) 32.Rd6 (32.Qh6 Qe7+–) 32...Qc4 (32...Qh3 33.Red1 Ng4 34.Rd8 Rd8 35.Rd8 Kg7 36.Rd7 Qh2 37.Kf1 Qf2 38.Qf2 Nf2 39.Kf2+–) 33.Red1 (33.Qh6 Qb4 34.Red1 Rf8+–) 33...Rf8 (33...Nf5 34.Rd7 Qe6 35.Rb7+–) 34.f3 (34.R1d4 Qe2 35.Qh6 Qh5 36.Qh5 gh5+–) 34...Qe2 (34...Nf5 35.Bf5 Qf4 36.gf4 gf5 37.Rf6+–) 35.Qd2 (35.Qh6 Qb2 36.Bg6 hg6 37.e6 Qh2 38.Kh2 Re8 39.ef7 Kf7 40.Qh7 Kf8 41.Rf6) 35...Qc4 (35...Qd2 36.R1d2 a6 37.Rd8+–) 36.Qd4 (36.e6 Nf5 37.Bf5 Kg7 38.Qb2 Kh6+–) 36...Qb3 (36...Qd4 37.R1d4 a6 38.Rd7+–) 37.Rd3 (better 37.Rd8 Qe6+–) 37...Qb1 38.Rd1 Qb3 39.Kg2 (better 39.Rd8!? Qe6 40.Qc5 Re8+–) 39...Nf5 40.Kh3 (40.Bf5 gf5 41.Qd2 f6 42.Rf6 Rf6 43.ef6 Qd1 44.Qd1 Kf7 45.Qd6 Kg6 46.Qe7 a6 47.Qg7 Kh5 48.h4 a5 49.Qh7) 40...Ne7?? (better 40...Nd4 41.R1d4 Ra8–+) 41.Rd7+– Nd5 (41...Qe6 42.Kg2+–) 42.Bd5 cd5 43.Qd5 Qe3 44.Rd8 Rd8 (44...Qh6 45.Kg2 Qe3 46.Rf8 Kf8 47.Qd8 Kg7 48.Qf6 Kh6 49.Qf7 b6 50.Qf8 Kh5 51.g4 Kh4 52.Qe7 Qg5 53.Qh7 Qh5 54.gh5 Kg5 55.h4 Kf4 56.Re1 gh5 57.Qf7) 45.Qd8 Kg7 46.Qf6 Kh6 47.Qh4 (47.Qh4 Kg7 48.Qd4+–; 47.Qf7 Kg5 48.Qe7 Kh6 49.Qh4 Kg7 50.Rd7 Kf8 51.Qd8) 1–0. alessandrocarvalhaes (1950) – KingFishJuan (1905), lichess.org, 2019.

3.f4 e5 A) 4.e3 A1) 4...e4 5.Nc3 (5.a3 Nf6 6.Nc3 Be7 7.d3 ed3 8.Bd3; 5.Bd4 c5 6.bc5 dc5 7.Bb2 Nf6 8.Nc3; 5.Be2 Nf6 6.b5 Be7 7.Nc3 0–0 8.g4; 5.b5 Nf6 6.Nc3 d5 7.Rb1 Bd6 8.Nge2) 5...Nf6 6.b5 d5 7.bc6 Nc6 8.Nge2; A2) 4...ef4 5.ef4 Qe7 6.Qe2 Bf5 7.Kd1 Nd7 8.Nf3; A3) 4...Nf6 5.Nf3 (5.Nc3 ef4 6.ef4 Be7 7.Nf3 Nh5 8.Ne2; 5.Ne2 Nbd7 6.a3 Nb6 7.fe5 Nc4 8.ef6; 5.fe5 de5 6.Be5 Bb4 7.Nf3 Nbd7 8.Bb2; 5.b5 ef4 6.ef4 Be7 7.Nf3 0–0 8.Nc3) 5...ef4 6.ef4 Be7 7.Nc3 0–0 8.Be2; B) 4.fe5 Qh4 5.g3 Qb4 6.Bc3+= Qe4 7.Nf3 Bg4 8.d3.

3.f4 Bf5 4.a3 A) 4...Nd7 5.d3 (5.Nc3 Ngf6 6.Nf3 e5 7.e3 ef4 8.ef4) 5...Bg4 6.h3 Be6 7.e4 Nb6 8.Nf3; B) 4...Nf6 5.Nf3 (5.e3 Nbd7 6.Nf3 e6 7.Be2 c5 8.0–0) 5...e6 6.e3 Be7 7.Be2 0–0 8.0–0; C) 4...d5 5.Nf3 (5.e3 a5 6.b5 Nf6 7.Nf3 e6 8.Be2) 5...e6 6.e3 Nf6 7.Be2 a5 8.b5; D) 4...a5 5.Nf3 (5.b5 e5 6.fe5 de5 7.Be5 Nd7 8.Bg3; 5.e3 e5 6.fe5 de5 7.Be5 Nd7 8.Bd4) 5...ab4 6.ab4 Ra1 7.Ba1 Nf6 8.e3; E) 4...e6 5.Nf3 (5.Nc3 Nf6 6.Nf3 Be7 7.e3 0–0 8.Be2) 5...Nf6 6.e3 Be7 7.Be2 0–0 8.0–0.

3.f4 Bf5 4.Nc3 d5 5.Nf3 (5.a3 a5 6.e3 ab4 7.ab4 Ra1 8.Ba1; 5.e3 d4 6.Nce2 de3 7.de3 Qd1 8.Kd1; 5.e4 Be4 6.Ne4 de4 7.Qe2 Qd5 8.g4) 5...Qd6 6.e3 Qb4 7.Rb1 Qd6 8.Nd4.

3.f4 Bf5 4.e3 A) 4...Nf6 5.Nf3 (5.Nc3 e5 6.Nf3 ef4 7.ef4 Be7 8.a3; 5.Be2 e5 6.fe5 de5 7.Be5 Bb4 8.Nf3) 5...e6 6.Nc3 Be7 7.Be2 0–0 8.0–0; B) 4...e5 5.Nf3 (5.Ne2 Nd7 6.a3 Be7 7.Ng3 Bh4 8.Nc3) 5...ef4 6.ef4 Qe7 7.Be2 d5 8.a3.

3.f4 Bf5 4.Nf3= Nd7 (4...e6 5.e3 (5.Nc3 Nf6 6.e3 d5 7.a3 c5 8.bc5; 5.a3 Nf6 6.e3 Be7 7.Be2 0–0 8.0–0) 5...Nf6 6.Be2 Nd5 7.a3 Be7 8.c4; 4...Nf6 5.e3 (5.a3 e6 6.Nc3 Be7 7.e3 0–0 8.Be2; 5.Nc3 e5 6.e3 ef4 7.ef4 Be7 8.a3) 5...e6 6.Be2 d5 7.a3 a5 8.b5; 4...d5 5.a3 (5.e3 e6 6.a3 Nf6 7.Be2 a5 8.b5; 5.Nd4 Bg4 6.a3 e6 7.g3 Nf6 8.h3) 5...e6 6.e3 Nf6 7.Be2 a5 8.b5) 5.d3 (5.e3 e5= (5...Ngf6 6.Be2 Qb6 7.a3 c5 8.Bf6) 6.Be2 ef4 7.ef4 Qb6 8.a3; 5.Nc3 Ngf6 6.Nh4 Be6 7.e4 Bg4 8.Nf3; 5.Nd4 Bg4 6.h3 Bh5 7.g4 e5 8.Nf3) 5...Ngf6 (5...d5 6.a3= e6 7.Nc3 Ngf6 8.e3; 5...e5 6.e4 Bg4 7.h3 Bf3 8.Qf3) 6.e4= Bg4 7.h3 Bf3 8.Qf3 e5 9.g3 (9.Nd2 a5=) 9...Be7 10.Nd2 a5 11.c3 (11.a3 ab4 12.ab4 Ra1 13.Ba1 Qa8+=) 11...d5 12.a3 0–0 (12...Bd6 13.Be2=) 13.Be2 (13.Bg2 Qb6+=) 13...Qc7 14.0–0 Rad8 (14...Rfe8 15.Kg2=) 15.f5 (15.ed5 cd5 16.fe5 Ne5=) 15...Nb6 (15...Qb6 16.Kg2=) 16.Rad1 (16.Rfb1 Na4+=) 16...Rd7 17.g4 de4 (17...Rfd8 18.Bc1+=) 18.de4= Rfd8 19.Bc1 ab4 20.ab4 Ne8 (20...h6 21.Nb3=) 21.Qg2 Na4 22.Nb1 c5 23.Rd7 Qd7 24.Rd1? Qc7?? 25.Bd2 cb4–/+ 26.cb4 Bb4 27.Be3 Rd1 28.Bd1 Bc5 29.Qf2?? Be3 30.Qe3 Qc5 31.Kf2–/+ Qe3 32.Ke3 Nc5 33.Nc3 Nd6 34.Bc2 b5 35.Nd5 f6 36.h4 Kf7 37.h5 b4 38.Nb4= h6 39.Nd5 Ke8 40.Nb6 Kd8 41.Nd5 Nc4 42.Ke2 Kd7 43.Bd3 Nd6 44.Ke3 Nb3 45.Ba6 Kc6 46.Bd3 Nc5 47.Ne7 Kb6 48.Nd5 Ka5 49.Bc2 Kb5 50.Nc7 Kb4 51.Bd3 Ka3 52.Nd5 Kb2 53.Nb6 Kc1 54.Nd5 Kd1 55.Nc3 Ke1+= 56.Nd5? Nd3–+ 57.Kd3 Kf2 58.Ne3 Kf3 59.g5 hg5 60.Nc4 Nc4 (60...Nc4 61.Kc4 Ke4–+) 0–1. Lingnau,Diethard – Sikorski,Thomas (1710), Duisburg Grossenbaum op, 2004.

3.f4 Nf6 A) 4.a3 A1) 4...a5 5.e3 (5.b5 cb5 6.e3 e6 7.Bb5 Bd7 8.Be2) 5...e5 6.Ne2 ab4 7.ab4 Ra1 8.Ba1; A2) 4...e6 5.Nf3 (5.e3 Be7 6.Nf3 Nbd7 7.Be2 0–0 8.0–0; 5.Nc3 e5 6.fe5 de5 7.e4 a5 8.b5) 5...Be7 6.Nc3 Nbd7 7.e3 0–0 8.Bd3; A3) 4...Bf5 5.Nf3 e6 6.e3 Be7 7.Be2 0–0 8.0–0; A4) 4...a6 5.Nf3 (5.e3 e6 6.Nf3 Be7 7.Be2 Nbd7 8.0–0; 5.Nc3 e5 6.e3 Be7 7.fe5 de5 8.Nf3) 5...Bg4 6.e3 e6 7.Be2 Be7 8.0–0; A5) 4...Bg4 5.Nf3 e6 6.e3 Bf3 7.Qf3 d5 8.Be2; B) 4.Nc3 e5 5.e3 ef4 6.ef4 Be7 7.Nf3 Nh5 8.Ne2; C) 4.e3 e5 5.Ne2 (5.fe5 de5 6.Be5 Bb4 7.Nf3 Nbd7 8.Bb2; 5.Nc3 ef4 6.ef4 Be7 7.a3 0–0 8.Be2; 5.b5 ef4 6.ef4 Be7 7.Nf3 0–0 8.Nc3; 5.Nf3 ef4 6.ef4 Be7 7.Nc3 Nh5 8.Ne2) 5...Bg4 6.h3 Be6 7.fe5 de5 8.Be5.

3.g3 Nd7 4.Bg2 h6 5.Nf3 Ngf6 6.d3 g5 7.Nbd2 g4 8.Ng1 Ne5 9.Ne4 (9.d4 Ng6 10.d5=) 9...Qd7 (9...Ne4 10.Be4 Bg7 11.Rb1=+) 10.f3 (10.Nf6 ef6 11.f4 gf3 12.Nf3 Qe7+=) 10...Qe6 (10...Ne4!? 11.de4 Rg8=+) 11.f4 Ned7 12.e3 h5 (12...d5 13.Nf6 ef6 14.Qd2=) 13.Qd2 (better 13.Ne2!? Qf5 14.Nd4+–) 13...Bg7 14.Ng5 Qf5 15.e4 Qg6 16.Ne2 Ne4?? (better 16...Nh7 17.Nh7 Bb2=+ (worse 17...Rh7 18.f5 Qh6 19.Qh6 Bh6 20.h3+=; worse 17...Qh7 18.Bg7 Qg7 19.d4=)) 17.Be4+– Qe4?? (17...Qh6 18.Bg7 Qg7+–) 18.de4 Bb2 19.Rb1 Bf6 20.f5 (20.b5!? cb5 21.Qd5 Bg5 22.Qg5 Nc5+–) 20...h4 21.gh4 Rh4 22.c3 (better 22.Ng3!? Ne5 23.Rb3 Bg7+–) 22...Rh5 23.h4?? (better 23.Nf7 Kf7 24.Nf4+–) 23...Ne5?? (23...Bg5 24.Qg5 Rg5 25.hg5+=) 24.Ng3 (better 24.Kf2+–) 24...Bg5+= 25.Qd4 (better 25.Qg2!? Rh4 26.Rh4 Bh4 27.Ke2+=) 25...Nf3=+ 26.Kf2 Nd4 27.Nh5 Nb5 28.hg5 Nc3 29.Rb2 Ne4 30.Ke3 Bf5?? (30...Ng5 31.Rg1 f6 32.Rg4 Kf7–+) 31.Kf4?? (better 31.Ng7 Kd7 32.Nf5+=) 31...e6 (better 31...Bg6!? 32.Nf6 ef6 (32...Nf6?! 33.Rh8 Kd7 34.Ra8 e5 35.Kg3 Ne4 36.Kg4=+) 33.Rh8 Kd7 34.Ra8 fg5 35.Kg4 f5 36.Kf3 a6–+) 32.Nf6–/+ Ke7?? (better 32...Nf6 33.Rh8 Kd7 34.Ra8 Nd5 35.Kg3 e5–/+) 33.Ne4+– d5 34.Nf6 Rd8 35.Rh7?? (35.Ng4 Bg4 36.Kg4 Rd7+–) 35...d4?? (better 35...Bh7 36.Nh7 g3=+) 36.Rg7+– d3 (better 36...b6+–) 37.Rd2?? (better 37.Rg8 Rd4 38.Ke3+–) 37...Rd4= 38.Ke3 Rb4 39.Rg8 Re4?? (better 39...c5=) 40.Ne4+– Be4 (40...Kd7 41.Rd3 Kc7 42.Rgd8+–) 41.Ke4 f5 42.gf6! Kf6 (42...Kf6 43.Rf2 Mate attack) 43.Rg4 (43.Rf2 Ke7 44.Ke5 c5 45.Rg7 Ke8 46.Ke6 c4 47.Rg8) 43...c5 (43...e5 44.Rf2 Ke6 45.Rg6 Ke7 46.Ke5 c5 47.Rg7 Ke8 48.Ke6 c4 49.Rg8) 44.Rd3 c4 (44...Ke7 45.Rg7 Ke8 46.Rb7 c4 47.Rh3 c3 48.Rh8) 45.Rc3 (45.Rd7 c3 46.Rdg7 c2 47.R4g6) 45...b5 (45...Ke7 46.Rg7 Kd6 47.Rc4 e5 48.Rb7 a6 49.Rbc7 Ke6 50.R4c6) 46.a3 (46.Ra3 Ke7 47.Rg7 Kd6 48.Ra6 Kc5 49.a3 b4 50.Rg5 e5 51.Re5) 46...a6 47.Rg8 (47.Rf3 Ke7 48.Ke5 Kd7 49.Rd4 Kc6 50.Rd6 Kb7 51.Rf7 Kc8 52.Rc6 Kd8 53.Ke6 b4 54.Rf8) 47...Ke7 (47...Kf7 48.Rcg3 Ke7 49.R3g7 Kf6 50.Rg6 Ke7 51.Ke5 Kd7 52.R8g7 Ke8 53.Ke6 Kd8 54.Rd7 Ke8 55.Rg8) 48.Ra8 (48.Rh3 Kd7 49.Ra8 Kc6 50.Ra6 Kc7 51.Rh7 Kb8 52.Re6 b4 53.Re8) 48...Kd6 49.Ra6 Kc5 (49...Ke7 50.Ke5 Kf7 51.Rg3 Ke8 52.Rg7 Kf8 53.Kf6 b4 54.Ra8) 50.Re6 (50.Rg3 e5 51.Rgg6 b4 52.Ra5) 50...b4+– 51.ab4 Kb4 (51...Kb5 52.Re5 Kb6 53.Rg3 Kc7 54.Rh5 Kd6 55.Rg7 Kc6 56.Rg6 Kb7 57.Rh7 Kb8 58.Rg8) 52.Kd4 Kb5 53.Rc4 Ka5 54.Rc1 Kb4 (54...Kb5 55.Rb1 Ka5 56.Re8 Ka4 57.Ra8) 55.Re8 (55.Rb1 Ka5 56.Re8 Ka4 57.Ra8) 55...Kb3 56.Rec8 (56.Rb8 Ka2 57.Rc7 Ka3 58.Ra7) 56...Kb2 57.Kd3 (57.Rb8 Kc1 58.Kd3 Kd1 59.Rb1) 57...Ka2 (57...Kb3 58.Rb8 Ka2 59.Rc7 Ka3 60.Ra7) 58.Rb8 (58.Rb8 Ka3 59.Ra1; 58.Kc3 Ka3 59.Ra8) 1–0. alessandrocarvalhaes (1865) – AAAA7777 (1745), lichess.org, 2019.

3.g3 e5 4.Bg2 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.g3 Nf6 4.Bg2 c6).

3.a3 Nd7

4.e3 e5 5.Nf3 Ne7 6.d4 g6 7.de5+– de5 8.Ne5 Ne5 (8...Bg7 9.Nc6! Bb2 10.Nd8 Ba1+–) 9.Qd8+– Kd8 10.Be5 Rg8 11.Nc3 Bg7 12.0–0–0 Ke8 13.Bg7 Rg7 14.Ne4 Be6 (14...f5 15.Nd6 Kf8 16.Bc4+–) 15.Nf6 (better 15.Nd6!? Kf8 16.Nb7+–) 15...Kf8 16.Bd3 Nd5 17.Nd5 Bd5 18.e4 Be6 19.f3 f5 20.ef5 Bf5 21.Bf5 gf5 22.Rhe1 (22.g3 a5+–) 22...Rg2+= 23.Re5 Rg5 (23...Rh2 24.Rd7 b5 25.Rf5 Kg8 26.Rg5 Kh8 27.Re5+–) 24.h4 (24.Rd7!? Re8 25.Re8 Ke8 26.Rh7+–) 24...Rh5+= 25.Rd7 Rh4? (better 25...b6!?+–) 26.Rf5+– Ke8 (26...Kg8 27.Rb7 Rh3 28.Kb2+–) 27.Rff7 (27.Rb7 a6+–) 27...Rh1 28.Kb2 Rc8?? (28...b6+–) 29.Rde7 Kd8 30.Rb7 Re1 (30...Ke8 31.Rbe7 Kd8 32.Ra7+–) 31.Ra7 (31.Rfd7 Ke8 32.Rh7 Kd8 33.Rbd7 Ke8 34.Ra7 Kd8 35.Rad7 Ke8+–) 31...Re2 (31...c5 32.Rfd7 Ke8 33.Rh7+–) 32.Rh7 (better 32.Rfd7!? Ke8 33.Rh7 Kd8 34.Rad7 Ke8+–) 32...Re3 (32...Rb8+–) 33.Rag7 Re8 (33...c5 34.b5 Re6+–) 34.Rd7 1–0. TwelveTeen (2320) – firesword288 (1865), lichess.org, 2016.

4.e3 Ngf6 5.Nf3 e5 6.d4 e4 7.Nfd2 d5 8.c4 Bd6 9.Nc3 0–0 10.g4 g6 (10...a5!?=+) 11.g5 Nh5 (11...Ne8 12.h4 Nc7 13.Qb3+=) 12.h4 f5 13.cd5 Nb6 14.dc6 bc6 15.Qb3 Rf7 16.d5 (16.Be2 Ng7+–) 16...cd5 17.Nd5 Be6 18.Bc4 (better 18.Qc3 Rg7 19.Nb6 ab6 20.Qd4+–) 18...Nc4=+ 19.Qc4 Rc8 (19...Bf8 20.Qd4 Bg7 21.Nf6 Bf6 22.gf6=) 20.Qb5 (20.Qd4 Rg7+–) 20...Bd5 (20...Rc2!? 21.Nf6 Kf8=) 21.Qd5+– f4? (better 21...Rcc7+–) 22.Ne4?? (better 22.Qd4 Ng7 23.Ne4+–) 22...fe3 (22...Bb4 23.Qd2 Bd2 24.Nd2 Qd3 25.Rh3 Ng3 26.Rg3 fg3 27.Ne4 gf2 28.Nf2 Qe3 29.Kd1 Rd7 30.Bd4 Rd4 31.Nd3 Rd3) 23.Nd6+– (23.Qd6?! ef2 24.Kf1 Qd6 25.Nd6 Rc2+–) 23...ef2 24.Kf1 Ng3 (24...Rcc7 25.Rh3 Kf8+–) 25.Kg2 Qd6 26.Qd6 Nh1 27.Rh1 f1Q (27...Rc2 28.Bf6 f1Q 29.Kf1+–) 28.Rf1 Rc2 29.Kg1 Rb2 30.Qd8 (30.Qe6 Rg2 31.Kg2 h6 32.Rf7 hg5 33.Qe8) 30...Kg7+– 31.Qd4 Kg8 (31...Kf8 32.Qh8 Ke7 33.Re1 Re2 34.Re2 Kd7 35.Qe8 Kc7 36.Qf7 Kd6 37.Rd2 Ke5 38.Qf6 Ke4 39.Rd4 Ke3 40.Qf2) 32.Qb2 (32.Qd5 Rbf2 33.Rf2 h5 34.Qf7 Kh8 35.Qe8 Kg7 36.Rf7) 32...Rf1+– 33.Kf1 h5 34.Qf6 (34.gh6 Kf7 35.h7 Ke7 36.Qe5 Kd7 37.h8Q Kc6 38.Qc8 Kb6 39.Qec5) 34...Kh7 (34...a6 35.Qg6 Kf8 36.Qe6 Kg7 37.g6 Kh8 38.Qf7 a5 39.Qf8) 35.Qf7+– Kh8 36.b5 (36.Qg6 a5 37.Qf6 Kg8 38.g6 ab4 39.Qf7 Kh8 40.Qf8) 36...a6 37.b6 a5 38.b7 a4 39.b8R (39.b8Q) 1–0. FeegLood (2260) – skopje123 (2185), lichess.org, 2015.

3.a3 e5

4.c4 f5 5.e3 g6 6.d4+= Bg7 7.de5 de5 8.Nf3 (8.Qd8!? Kd8 9.Nf3+=) 8...Qd1= 9.Kd1 Ne7? (better is 9...Nd7!?=) 10.Be5+/– Be5 11.Ne5 Nd7 12.Nd7 Bd7 13.Be2 0–0–0 14.Kc2 Be6 15.Nc3 g5 16.Rhd1 Ng6 17.Rd8 Rd8 18.Rd1 Rd1 19.Bd1 (19.Kd1 Kd7+/–) 19...Ne5 (better is 19...Bc4!? 20.Bh5 g4=) 20.c5+/– Nc4 21.Nb1 f4 22.ef4 gf4 23.Be2 Kd7 24.Bc4 Bc4 25.g3 fg3 26.fg3 Be6 27.Nd2+– Bh3 28.Kd3 Bf5 29.Ke3 Ke6 30.Kf4 Bh3 31.Nf3 Bg2 32.Ng5 Kd5 33.Nh7 Kc4 34.g4 Kb3 35.g5 Ka3 36.g6 Bd5 37.Nf6 Bc4 38.h4 Kb4 39.h5 Kc5 40.h6 a5 41.h7 a4 42.h8Q a3 43.Qf8 Kb5 44.Qa3 c5 45.Ne4 Kc6 46.Nc5 b5+– 47.Nd3 Bd3 48.Qc3 Bc4 49.Qd3 Kb6 50.g7 Ka5 (50...Ka5 51.Qc3 Ka4+–). Fournier,Frederic – Apollonas, Partie evaluee, 1m + 0s, 2007.

4.e3 Nf6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 c6).

3.a3 Nf6

4.e3 e5 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 c6).

4.e3 g6 5.Nf3 Bg7 6.c4 0–0 7.Nc3 e5 8.d4 Nbd7 9.de5 (9.Be2 Re8+=) 9...Ne5= 10.Be2 Nf3 11.Bf3 d5 (11...Be6 12.Be2=) 12.cd5 cd5 (12...Nd5 A) worse 13.Nd5 Bb2 14.Rb1 Be5–/+ (worse 14...cd5 15.Rb2 Qf6 16.Ra2+=; 14...Ba3?! 15.Rb3=+); B) 13.Qc1 Nf6 14.0–0=) 13.0–0 Bf5 (13...Be6 14.Nb5+=) 14.Ne2 (better 14.Nd5!? Nd5 15.Bg7 Ne3 16.fe3 Kg7 17.Bb7 Qd1 18.Rad1+–) 14...Rc8 15.Nd4 Ne4 16.Qb3 (better 16.Nf5!? Bb2 17.Ra2+–) 16...Nd2= 17.Qa4? (better 17.Qd5 Nf1 18.Rf1 Qd5 19.Bd5=+) 17...Nf3–+ 18.gf3 Qg5 (better 18...Bh3 19.f4 Qh4–+) 19.Kh1 Bh3?? (better 19...Bd4 20.ed4 Bh3–+) 20.Rg1=+ Qf6 (better 20...Qh5!? 21.Rg3 a6=+) 21.Rg3 Be6 22.Ne6?? (better 22.Qa7 Qe7 23.b5+=) 22...Qb2–+ (22...Qe6 23.Bg7 Kg7 24.Qa7+=) 23.Rag1 (23.Nf8 Qa1 24.Rg1–+) 23...fe6 24.Qa7 (24.R3g2 Rc1 25.Rc1 Qc1 26.Rg1 Qc4–+) 24...Qf2 25.Qb7 (25.Qb6 Rc6 26.Qb7 Rc2–+) 25...Rc2 26.R3g2 (26.Rh3 Qe3 27.Qa6 Rf3 28.Qa8 Bf8 29.Qe8–+) 26...Qf3 27.Qb5 (27.Qe7 Qe4 28.Qg5 Rff2 29.Qd8 Bf8–+) 27...Rfc8 (better 27...Rg2 28.Rg2 Rc8–+) 28.a4 (28.Qf1 Qe4 29.Qf4 Rg2 30.Qe4 Rg1 31.Kg1 de4 32.Kg2–+) 28...Rg2 29.Rg2 (29.Qe8 Re8 30.Rg2 Rc8 31.h3 Rc1 32.Kh2 Be5 33.Rg3 Qg3) 29…Rc1 (29...Rc1 30.Qf1 Rf1) 0–1. alddhsfd (1995) – petrionex (1990), lichess.org, 2021.

3.a3 g6

4.e3 Nf6 5.Nf3 Bg7 6.Be2 0–0 7.0–0 e5 (7...a5 8.b5=) 8.c4 Nbd7 9.c5 (9.d4 Qc7+=) 9...a5 (better 9...e4!? 10.Ne1 dc5–/+) 10.cd6= ab4 (10...e4 11.Ne1=) 11.ab4 (11.Ne5 Ne4 12.d4 ba3 13.Na3 Nd6+=) 11...Ra1= 12.Ba1 Qb6 (12...Ne8!?=) 13.Ne5+= Qb4 14.Nd7 (14.Nc4 b5 15.Bc3 Qc5 16.Bf6 Nf6+=) 14...Bd7+= 15.Be5 Nd5 16.f4 (16.Bg7 Kg7 17.Qc2 Nf6+=) 16...f6 17.Ba1 Qd6 18.Bc4 Kh8 19.Nc3 Nb6 (19...Nc3 20.Bc3 b5 21.Be2=) 20.Bb3 Be6 (20...Re8 21.e4=) 21.Ne4 Qd7? (better 21...Qe7!?+=) 22.Nc5+– Bb3 23.Nd7 (better 23.Qb3!? Qd2 24.Qb6 Qe3 25.Kh1+–) 23...Bd1+= 24.Nf8 Be2 (24...Bg4 25.h3 Bc8=) 25.Rb1+– Bf8? (better 25...Nc4 26.Ne6 Nd6+–) 26.Rb6 Ba6 27.Bf6 Kg8 28.Bd4 Kf7 29.Kf2 Ke6 30.e4 h6 (30...Kd7 31.g4+–) 31.g4 g5 (31...Kf7 32.f5+–) 32.f5 Kd6 33.Ke3 Kc7 34.Rb1 Bd6 (34...c5 35.Rc1 b6 36.Be5 Kd7 37.d4+–) 35.e5 Bf8 36.Bb6 Kd7 37.d4 Bc4 (37...Ke8 38.f6 Bc4 39.Ra1+–) 38.Bc5 Bc5 39.dc5 Bb5 40.Kd4 Ke7 (40...Ke8+–) 41.e6 Kf6 42.Re1 b6 43.e7 bc5 (43...Kf7 44.e8Q Kg7 45.Qd7 Kf6 46.Re6) 44.Kc5 (44.Kc5 Bd3 45.e8Q Bf5 46.Qf8 Kg6 47.Re7 Bg4 48.Qf7) 1–0. FeegLood (2600) – Alicia75 (2185), lichess.org, 2015.

4.Bh8 f6 5.h4 Nh6 6.h5 g5 7.e3 Nf7 8.Bd3 Nh8 9.Bh7 Bh6 10.Nf3 Kf8 (10...e5 11.Nc3+–) 11.Bd3 Kg7 12.Nc3 e5 13.Ne2 (13.Nh2!? Nf7+–) 13...d5 14.Nfg1 (better 14.Bg6+–) 14...e4+– 15.Be4! de4 16.Ng3 f5 17.N1e2 Qf6 18.Ra2 (18.Nd4 Nf7+–) 18...Nf7 19.d3 Be6 20.Ra1 ed3 21.cd3 Nd7 (21...Nd6 22.Nd4=) 22.Nd4+– a5 23.0–0 Nde5 24.Rc1 ab4 25.ab4 Rd8 26.Rc5 (26.Qc2 Bd7+=) 26...f4 27.Ne4 (27.Ne6 Qe6 28.Ne2 f3 29.gf3 Nf3 30.Kg2 N7e5–+) 27...Qe7 28.Qa1 (28.b5 Bg4 29.Qc2 Rd5+=) 28...Kf8 29.Ne6 (29.Qb1 Bg4=) 29...Qe6 30.ef4 (better 30.Rc3!? fe3 31.Nc5 ef2 32.Rf2= (worse 32.Kf2 Qd6–/+)) 30...gf4–/+ (worse 30...Nd3 31.Ng5 Bg5 32.Rg5 Nf4 33.Qg7 Ke8 34.Ra5=) 31.d4 Nd3 32.Nd2 Nc5 (32...Nb4?! 33.Qa3 Rd4 34.Nf3=) 33.bc5 Qg4 34.Nf3 Rd5 (34...Qh5 35.Qb1–+) 35.Qa8–/+ Kg7?? (better 35...Nd8–/+) 36.Qb7= Rh5 37.Qc6 Qg6 (37...Ng5!? 38.Qb7 Kg8 39.Qb3 Kg7=) 38.Qg6+– Kg6 39.Rd1 (better 39.c6 Nd6 40.c7+–) 39...Rg5?? (39...Rd5 40.c6 Nd6 41.g4+–) 40.Kf1 (40.Ng5 Bg5 41.d5 Kf5+–) 40...Kg7? (40...Rd5+–) 41.Ke2 (better 41.Ng5 Bg5 42.Ke2+–) 41...Rf5? (better 41...Rg2 42.d5 Kf6+=) 42.Ne5?? (42.Kd3 Kf6+–) 42...Rf6?? (42...Ne5 43.de5 Re5 44.Kf3 Rc5 45.g3=+) 43.c6?? (43.Nf7!? Kf7 44.Kf3 Ra6+–) 43...Re6 (43...Ne5 44.de5 Rc6 45.Rd7 Kg6 46.Rd6 Rd6 47.ed6=) 44.Kf3 (better 44.c7 Re8 45.Kf3 Ng5 46.Kf4 Rf8 47.Kg4+–) 44...Re5?? (better 44...Ne5 45.de5 Rc6+= (45...Re5? 46.Rc1 Re8 47.c7+–)) 45.de5+– Ne5 46.Ke4 Ng6 (46...Nc6 47.Rd7 Kg6 48.Rd6 Kg5 49.Rc6+–) 47.Rd6 (better 47.Rd7 Kf6 48.c7 Ne7 49.Re7 Ke7+–) 47...Ne7 48.Rd7 (48.Rd7 Kf6 49.c7+–) 1–0. FeegLood (2825) – skopje123 (2470), Time forfeit, 2015.

3.a4 Nd7

4.e3 Qc7 5.c4 e5 6.b5 Ngf6 7.Nf3 h6 8.Be2 Be7 9.0–0 0–0 10.Nc3 Re8 11.h3 Bf8 (11...e4 12.Nd4=) 12.Qc2 Nc5 (12...c5 13.d3+=) 13.d4+= Ncd7 14.de5 (14.a5 cb5 15.cb5 e4+=) 14...de5 15.Ne4 Ne4 16.Qe4 g6 17.Qc2 Bg7 18.Rfd1 Nc5 19.Ba3 (19.e4 f5 20.Nd2 Be6=) 19...Bf5 20.Qb2 (20.Qa2 A) 20...Na4? 21.Bd6 Qa5 22.Qb3+– (22.Qa4?! Qa4 23.Ra4 Bc2+–); B) 20...Ne4 21.Bb2 a6=) 20...e4 (20...Na4!? 21.Qb3 cb5=+) 21.Nd4= Na4 22.Qb4 c5 23.Qa4 cd4 24.ed4 e3 25.fe3 Re3 26.Bf3?? (better 26.Bf1!?=+) 26...Bh3 27.gh3?? (27.Bd5 Qg3 28.Qc2 Re1 29.Re1 Bd4 30.Kh1–+) 27...Rf3 (27...Qg3 28.Kh1 Re1 29.Re1 Qh3 30.Kg1 Bd4 31.Re3 Be3) 28.Rd2 (28.Qc2 Rg3 29.Kf1 Qf4 30.Qf2–+) 28...Qg3 29.Rg2 (29.Kh1 Qh3 30.Kg1 Rg3 31.Kf2 Qh2 32.Ke1 Rg1) 29...Bd4 30.Kh1 Qh3 31.Rh2 Rf1 (31...Rf1 32.Rf1 Qf1) 0–1. RichardSommer (2085) – miekel27 (2115), lichess.org, 2020.

4.e3 e5 5.c4 b6 6.b5 c5 7.d4 ed4 8.ed4 cd4 9.Bd4 Bb7 10.Nf3 Ngf6 11.Be2 Be7 12.0–0 0–0 13.Bb2 d5 14.Nd4 Nc5 15.Bf3 Nce4 (15...Re8 16.cd5 Nd5 17.a5=) 16.Nc3 (16.Nc6 Bc6 17.bc6 dc4 18.Qd8 Rfd8+=) 16...Bc5 (16...Nc3 17.Bc3 Rc8 18.Nf5 Rc4 19.Qd2=) 17.Ne4 (better 17.Nd5!? Bd5 18.cd5 Qd5 19.Nc6+=) 17...de4=+ 18.Be2 Qc7 19.Qc2 Rad8 20.Nf5 (20.Rad1 Rfe8=+) 20...Qf4 21.Ng3 (21.Bf6 gf6 22.Ng3 Rd2=+) 21...Rd2 22.Qc3 (22.Qb3 e3 23.f3 Rfd8–/+) 22...Bd4 (22...e3 23.Bc1 Bd4 (23...ef2?! 24.Kh1 Rfd8 25.Bd2 Qd2 26.Qb3=) 24.Bd2 Bc3 (worse 24...ed2 25.Qa3–/+) 25.Bc3 Ne4 26.Ne4 Qe4–+ (26...Be4?! 27.Rad1–/+)) 23.Qd4=+ Rd4 24.Bd4 h5 (24...Rd8 25.Rad1 Re8 26.a5 ba5 27.c5=+) 25.Bh5= (worse 25.Nh5 Nh5 26.Bh5 Qg5–/+) 25...Nh5 26.Nh5 f5?? (better 26...Qg5 27.Ng3 f5=) 27.Nf4+– (27.Nf4 g5 28.Ne6+–) 1–0. RichardSommer (2090) – Ludogoretz (2080), lichess.org, 2020.

4.e3 e5 5.c4 Qc7 6.b5 c5 7.d4 a5 (7...Ngf6 8.Nf3=) 8.de5 de5 9.Nf3 b6 10.Qd5 e5 seems the pivot of the position (better 10.Ne5!? Ne5 11.Qd5 Nc4 12.Bc4+=) 10...Bb7=+ 11.Be5? (better 11.Qd2=+) 11...Bd5?? (better 11...Qc8 12.Qd2 Bf3–+) 12.Bc7+– Bf3 13.gf3 Rc8 14.Bg3 Ne7 15.f4 (15.Nc3 f5+–) 15...Nf5 16.Bg2 Nd6 17.Bd5 g6 18.Nc3 Bg7 19.Rc1 0–0 (19...h5 20.h4+–) 20.0–0 (20.e4 Bd4+–) 20...Rcd8 21.e4 Bd4 (21...Rfe8 22.Bh4 Rc8 23.Bc6+–) 22.f5 Ne5 23.fg6 (23.Ne2 Rfe8 24.Nd4 cd4 25.fg6 hg6+–) 23...hg6+– 24.Be5 Be5 25.f4 Bd4 26.Kg2 Kg7 (26...Rfe8 27.Kf3 Kg7+–) 27.e5 (better 27.Ne2!?+–) 27...Nf5+= 28.Ne4 (28.Nd1 Rh8+=) 28...Ne3= 29.Kf3 Nf1 30.Rf1 Rh8 31.Kg2 Rh4 32.Ng5 Rdh8 The backward pawn on h2 becomes a target 33.h3 f6 (33...R8h5!? 34.Nf7 Rh3=) 34.Ne6+– Kh6 35.Nd4 cd4 36.ef6 Rf8 37.f7 (37.Kg3 Rh5 38.f7 Kg7+–) 37...Kg7+= 38.Kg3 Rh5 39.Rd1 Rd8 (better 39...Rfh8!? 40.f8Q Kf8+=) 40.Rd4+– Kf8 (40...Rf5 41.Re4 Rdd5 42.cd5 Rd5 43.Rc4+–) 41.Re4 (41.Kg4 Rd7+–) 41...Rhd5 42.cd5 Rd5 43.Re6 Kf7 44.Rb6 Rd4 45.Ra6 Ra4 46.b6 (46.Kg4 Ra1+–) 46...Rb4+– 47.Ra5 Rb6 48.Kg4 Rb1 49.Ra7 Kf6 50.Ra6 Kg7 51.Kg5 (51.Rc6 Rd1+–) 51...Rg1 (51...Rb5!? 52.Kh4 Rb4+=) 52.Kh4+– Kh6 53.f5 (53.f5 Rg5 54.fg6 Rg6 55.Ra8+–) 1–0. RichardSommer (2080) – krism_2013 (2035), lichess.org, 2020.

3.b5 Nd7

4.a4 c5 5.e3 b6 (5...e5 6.d4=) 6.c4 Bb7 7.Nf3 Ngf6 8.Be2 g6 9.0–0 Bg7 10.d4 0–0 11.Nc3 cd4 12.Nd4 Ne4 (12...Qc7 13.a5 ba5 14.Nb3=) 13.Ne4+= Be4 14.Bf3 (14.f3 Bb7=) 14...Bf3= 15.Qf3 (worse 15.gf3 Ne5–/+) 15...Qc7 16.Nc6?? (16.Qe4 Rfe8=) 16...Ne5?? (better 16...Bb2 17.Ne7 Kg7–+) 17.Be5+= de5 (better 17...Be5 18.Ra2 Rfc8+=) 18.Ne5?? (better 18.a5 e6 19.ab6 Qb6 20.Ra6+–) 18...Qe5 (18...Be5!? 19.Rad1–+) 19.Rac1 Qf6 (19...Qc7 20.Rfd1–+) 20.Rfd1 (20.Qf6 Bf6 21.c5 bc5 22.Rc5 Rfd8–+) 20...Qf3 21.gf3 Rfd8 (21...Rfc8 22.Rd7 Kf8 23.f4–+) 22.Kg2 (22.Rd8 Rd8 23.c5 bc5 24.Rc5 Rd7–+) 22...Rd1 23.Rd1 Kf8 24.Rd7 Ke8 25.Rb7 (25.Rc7 Kd8 26.Rc6 Rc8 27.Rc8 Kc8–+) 25...Kd8 26.a5 (26.e4 Bf6 27.c5 bc5–+) 26...ba5 27.c5 a4 28.c6 (28.b6 ab6 29.cb6–+) 28...a3 29.b6 (29.Rd7 Ke8 30.Rd2–+) 29...ab6 30.Rb6 (30.Rd7 Ke8 31.Rd1 a2–+) 30...Kc7 (better 30...a2 31.h4–+) 31.Rb1 (31.Rb7 Kc6 32.Rb1 a2 33.Rc1 Kd5 34.e4 Ke5–+) 31...Kc6 (better 31...a2 32.Rc1 Rb8 33.Rd1–+) 32.Rc1 Kd7 33.Rd1 Ke8 34.Rc1 a2 35.Ra1 Ba1 (35...Ba1 36.Kg3 Bc3–+) 0–1. BeepBeepImAJeep (2585) – smashinglad (2080), lichess.org, 2018.

4.a4 Qc7 5.c4 e5 6.e3 Be7 7.Nf3 Ngf6 8.Be2 0–0 9.0–0 Re8 10.d4 Bf8 11.de5 (11.Nc3 e4 12.Nd2 d5+=) 11...de5 12.Nc3 Nc5 13.Qc2 e4 14.Nd4 Bg4 15.Rfd1 Be2 16.Nde2 Ng4 (16...Bd6 17.h3=+) 17.Ng3= g6 (17...f5 18.bc6 bc6 19.Rab1=+ (19.Nf5?? Qh2 20.Kf1 Qh1 21.Ke2 Qg2–+)) 18.Ba3 (worse 18.Nce4 Ne4 19.Ne4 Qh2 20.Kf1 Qh1 21.Ke2 Qg2=+) 18...h5? (better 18...f5=) 19.Bc5+– Bc5 20.Nce4 Be7 21.h3 Nf6 22.Qc3 Ne4 23.Ne4 Bh4 24.Nf6 Bf6 25.Qf6 Re6 26.Qf3 Rae8 27.Rd4 cb5 (27...R8e7 28.Qd1+–) 28.cb5 Qc3 29.Rad1 R6e7 30.Qf4 Qa3 31.Rc4 Qb3 32.Qd4?? (better 32.Rdc1+–) 32...Re4!–+ 33.Rc3 (33.Qe4 A deflection 33...Qd1) 33...Rd4 34.Rb3 Rd1 35.Kh2 Ra1 (35...Rd2 36.Kg3–+) 36.Rb4 Rd8 37.Rc4 Rd2 38.Kg3 Raa2 39.Rc8 (39.Rf4–+) 39...Kg7 40.f3 (40.Rc7 Rf2 41.h4 Rg2 42.Kf3 Rgf2 43.Kg3 Kf6–+) 40...Ra4 (better 40...g5 41.Kh2 Rg2 42.Kh1–+) 41.Rc7 (41.e4 Ra5 42.h4 Rb5–+) 41...h4 42.Kh2 Raa2 43.Rc1 Rg2 44.Kh1 Rg3 45.b6 Rh3 46.Kg1 ab6 (46...Rhh2 47.Rc7 Rag2 48.Kf1 h3 49.Rf7 Kf7 50.ba7 Rh1) 47.e4 (47.Rc3 Rhh2 48.Rc7 Rag2 49.Kf1 h3 50.Rf7 Kf7 51.f4 Rh1) 47...Rg3 (47...Rhh2 48.Rc8 Rag2 49.Kf1 h3 50.Rg8 Kg8 51.f4 Rh1) 48.Kh1 (48.Kf1 h3 49.Ra1 Rf3 50.Ke1 h2 51.Ra2 h1Q 52.Ke2 Qg2 53.Ke1 Rf1) 48...Rgg2 49.e5 (49.Ra1 Rh2 50.Kg1 Rag2 51.Kf1 h3 52.f4 Rh1) 49...Rh2 50.Kg1 Rag2 51.Kf1 Rh1 (51...h3 52.e6 Rh1) 52.Kg2–+ Rc1 53.f4 Rc6 54.Kf3 Re6 55.Ke4 f6 56.Kd5 Kf7 57.f5 (57.f5 Re5 58.Kd6 gf5 59.Kc7 b5 60.Kb7 h3 61.Kc7 h2 62.Kc6 h1Q 63.Kc7 Rc5 64.Kb6 Qc6 65.Ka5 b4 66.Kb4 Rb5 67.Ka3 Qa8) 1–0. BeepBeepImAJeep (2705) – GMChavez (2545), lichess.org, 2020.

4.a4 Qc7 5.c4 e5 6.e3 Ngf6 7.Nf3 Be7 8.Be2 0–0 9.0–0 h6 (9...Re8 10.Nc3=) 10.d4 Re8 11.Nc3 Bf8 12.Rc1 c5 13.dc5 Nc5 14.Nd5 Nd5 15.cd5 (worse 15.Qd5 Na4 16.Ba3 Qa5–/+) 15...Qd8 16.Ba3 b6 17.Nd2 Bb7 18.Nc4 Qg5 19.Bc5 dc5 The passed pawn on d5 will become decisive later 20.e4 Rad8 21.f3 Qg6 22.Qd2 White prepares a5 22...Bc8 23.Bd3 f5 24.Qe2 f4 25.a5 Bd7 (25...ba5 26.Ra1+= (worse 26.Na5 Qb6 27.Nc4 Qb5=)) 26.ab6+– ab6 27.Rb1 (27.Qb2 Qf6+–) 27...Ra8 28.Rb2 Reb8? (28...Qf6 29.Rd1=) 29.Rfb1?? (29.Ne5 Qe8 30.Nd7 Qd7+–) 29...Ra4? (29...Qf6!?+=) 30.Ra2 (30.Ne5 Qe8 31.Nc4 Qf7+–) 30...Rba8 (30...Ra2 31.Qa2 Bd6 32.Qa1+– (32.Nd6?! Qd6 33.Bc4 Rd8+=)) 31.Ra4+– Ra4 32.Qb2 (better 32.Ne5!? Qe8 33.Nd7 Qd7 34.Rc1+–) 32...Rb4+– 33.Qc2 (better 33.Qe5 Rb1 34.Bb1 Bb5 35.Bd3+=) 33...Kh7?? (better 33...Qf6=) 34.Rb4 cb4 35.Ne5 Bc5 36.Kf1 (better 36.Qc5! bc5 37.Ng6 c4 38.Bc4 Bb5+–) 36...Qd6 37.Nd7 Qd7 38.e5 Kg8 39.Bc4 Kh8 (39...Qa7 40.d6 Kh8 41.Ba2+–) 40.d6 Qe8 41.Qe4 Qd7 (41...Qd8 42.d7! Qd7 43.Qa8 Kh7 44.Bg8 Kg6 45.Qc6 Qc6 46.bc6 b3+–) 42.Qa8 (42.Bd3 g6 43.Qg6 Qf7 44.Qf7 Bd6 45.Qh7) 42...Kh7 43.Bd3 (better 43.h4 Bd6 44.Qg8 Kg6 45.Qd5+–) 43...g6 44.Qd5 (44.Qc6!? Qg7 45.Qe8 h5+–) 44...Qa7 45.Bb1 h5 (45...Qd7+–) 46.d7 Be7 (46...Kh6 47.Qf7 Kg5 48.Qg6 Kh4 49.Qf6) 47.Qf7 Kh6 (47...Kh8 48.Qg6 Qd7 49.Qh7) 48.Qg6 1–0. BeepBeepImAJeep (2565) – FanniBanni (2000), lichess.org, 2017.

4.c4 cb5 5.cb5 Ngf6 6.a4 g6 7.e3 Bg7 8.Nf3 0–0 9.Be2 e5 10.0–0 Nc5 11.d4 ed4 12.Nd4 (worse 12.Qd4 Nb3 13.Qb4 Na1 14.Ba1 Nd5–/+; 12.ed4?! Nce4=; 12.Bd4?! Ne6+=) 12...Nce4 (12...Re8 13.Nd2+=) 13.Nd2 Bd7 14.Bf3 d5 15.Rc1 Re8 16.N2b3 Rc8 17.Qd3 b6 (17...Qe7 18.Be2+=) 18.Nc6 Bc6 19.bc6 Qd6 20.Nd4 Ng5 21.Ba3 (21.Nb5 Nf3 22.gf3 Qe6 23.Na7 Ra8=) 21...Qc7 (21...Nf3!? 22.Nf3 Qb8+=) 22.Be2+– Nfe4 (22...Qb8!?+–) 23.Nb5+– Qe7?? (better 23...Qb8+–) 24.Be7 Re7 25.Qd5 Nf6 (25...a6 26.Nd6 Rcc7 27.Ne4 Ne4 28.Qd8 Bf8 29.Ba6+–) 26.Qg5 (26.Qg5 h6 27.Qh4+–) 1–0. BeepBeepImAJeep (2705) – zalimantuan (2380), lichess.org, 2016.

4.c4 Qc7 5.a4 e5 6.e3 h6 7.Nf3 Ngf6 8.Be2 Be7 9.0–0 0–0 10.d4 Re8 11.de5 (11.Nc3 e4 12.Nd2 d5+=) 11...de5 12.Nc3 Bd6 13.h3 e4 14.Nd2 Nc5 15.Nb3 Bf5 (15...Qe7 16.Nb1=+) 16.Nc5= Bc5 17.Qc2 Rad8 18.Rad1 Qe5?? (better 18...cb5 19.ab5 Rc8=) 19.Nd5!+– cd5? (19...Nd5 20.Be5) 20.Be5 Annihilates a defender: e5 20...Re5 21.cd5 Bd6 (21...Red5 22.Rd5 Rd5 23.Bc4+–) 22.Bc4 h5 (22...Re7 23.Qb3+–) 23.Qb3 g5 24.f4 (24.b6!? a6+–) 24...ef3 25.Rf3 g4 26.hg4 Ng4 27.Rdf1 (27.Re1 Be4 28.Rh3 Bd5 29.Bd5 Rd5+–) 27...Bg6 (27...Ne3 28.Rc1+–) 28.b6 a6 29.Be2 (better 29.Re1!? Be4 30.Rh3 Bd5 31.Bd5 Rd5+–) 29...Rde8 30.a5 (better 30.Bd3 Re3 31.Bg6 Rb3 32.Bf7 Kg7 33.Be8 Rf3 34.gf3+–) 30...Re3? (better 30...Ne3 31.Rc1 Nf5 32.Rf5 Rf5+–) 31.Re3 Re3 (31...Ne3 32.Rc1+–) 32.Qb2 (32.Qc4 Ne5 33.Qc8 Kg7+–) 32...Bc5 Threatening mate: Rh3 33.Kh1 Be4 (33...Ne5 34.Qc1 Nd7 35.Bf3+–) 34.Bf3 Bf3 35.gf3 Nh6 (35...Ne5+–) 36.Qg2 Kh7 (36...Kh8 37.Qg5 Kh7 38.d6+–) 37.Rg1 (37.Qc2!? Kg7 38.Qc5 Nf5+–) 37...Bf8 (37...Bd4 38.d6 Re6 39.d7+–) 38.Qg5 (38.Qg5 Rf3 39.Qg2+–; better 38.Qc2 f5 39.Qc8+–) 1–0. BeepBeepImAJeep (2605) – FanniBanni (2140), lichess.org, 2019.

4.c4 Qc7 5.e3 Ngf6 6.a4 e5 7.Nf3 Be7 8.Be2 Nf8 (8...0–0 9.0–0=) 9.d4= Ng6 10.de5 (10.0–0 0–0=) 10...de5 11.0–0 Be6 12.Nc3 Rd8 13.Qc2 Bb4 14.Rad1 0–0 15.Nd2 Bd6 16.Nde4 Ne4 17.Ne4 Be7 18.Ng3 Bd6 19.Bf3 (19.Nf5 Bc5=) 19...Be7 (19...cb5 20.Ne4 bc4 21.Nd6 Rd6 22.Rd6 Qd6 23.Rd1–+) 20.Qb3 (20.bc6 bc6 21.Rd8 Rd8=) 20...Bf6 (better 20...cb5!? 21.Rd8 Bd8 (21...Qd8?! 22.ab5 Qb6 23.Be4=; 21...Rd8?! 22.Qb5 a6 23.Qb3–/+) 22.Qb5 Bc4 23.Qb7 Bf1 24.Nf1 Qb7 25.Bb7 Ba5–+) 21.Ne4 Be7 22.Qc2 (22.Ng3 cb5 23.ab5 Qc4 (23...Bc4?! 24.Rc1 Rc8 25.Qa4=) 24.Qc4 Bc4 25.Rd8 Rd8–/+) 22...f5 (22...cb5 23.ab5 Qc4 24.Nc3–/+) 23.Ng3 (23.Nd2 cb5 24.ab5 e4=+) 23...e4 (23...cb5 24.Rd8 Bd8 25.ab5 Qc4 26.Qc4 Bc4 27.Rd1=+) 24.Be2= Bf6 (24...cb5!? 25.ab5 Bd6=) 25.Bf6+= Rf6 26.Rd8 Qd8 27.Rd1 Qc7 28.c5 Rf8 29.Nh5 (29.bc6 bc6 (29...Qc6?? 30.Rd6 Qc7 31.Re6+–) 30.Bc4 Qf7 31.Be6 Qe6+–) 29...Ne5 30.Nf4 Bd5? (better 30...Bf7!?+=) 31.Nd5 cd5 32.Rd5 Nd7 33.c6 bc6 (33...Nb6 34.Rd1 bc6 35.a5+–) 34.Qc6 Qc6 35.bc6 Nb6 36.Rd4 Rc8 37.a5 Na8 (37...Rc6 38.ab6 Rc1 39.Bf1 ab6 40.g4 fg4 41.Re4+–) 38.Bc4 (better 38.Rd7!? Nc7 39.Bc4 Kh8+–) 38...Kf8 39.Bb5 Nc7 40.Ba4 a6 41.Rd7 g6? (better 41...Ne6 42.Rd5 Ke7+–) 42.Rh7 Kg8 43.Rd7 Nb5 (43...Kf8+–) 44.Bb5 ab5 45.Rd6 (better 45.c7 Kf8 46.a6+–) 45...Kf7 46.g3 (better 46.a6 b4 47.g4+–) 46...g5? (46...b4+–) 47.Rd5 Ke6 48.Rb5 Rc6 (48...g4 49.Rc5 Rc7+–) 49.Rb6 Kd6 50.Rc6 Kc6 51.h4 gh4 52.gh4 (52.gh4 Kb5 53.h5+–) 1–0. BeepBeepImAJeep (2570) – yaya (2380), lichess.org, 2016.

4.c4 Qc7 5.e3 h6 (5...Ngf6 6.d4=) 6.a4 e5 7.Nf3 Ngf6 8.Be2 Be7 9.0–0 0–0 10.Nc3 Re8 11.d4 Nf8 12.Qb3 (12.Qd3 N8d7+=) 12...Ng6 13.de5 de5 14.Rad1 Be6 15.Qc2 Rad8 16.Rd8 Rd8 17.Rd1 Re8 (17...Rd1 18.Qd1 Qa5 19.Bd3=) 18.Nd2 (18.Bd3 Nf8+=) 18...Nh7 (18...cb5 19.Nb5 Qb6 20.Bd3=) 19.Nde4+= Ng5 20.Ng5 Bg5 21.Ne4 Be7 22.Ng3 Bf6 (22...cb5 23.ab5 a6 24.ba6 ba6 25.Ra1=) 23.Bd3 (23.c5 cb5 24.ab5 Be7=) 23...Nf8 (23...Rd8 24.Bc3=) 24.Bf5 Rd8 25.h3 (better 25.Rd8!? Qd8 26.Be4+=) 25...Rd1=+ 26.Qd1 Qc8 (26...Bc4 27.Nh5 cb5 28.Nf6 gf6 29.ab5 Bb5 30.Ba3=+) 27.Be6 Ne6 (27...Qe6 28.Ba3=) 28.Qc2 (28.Ne4 Nf8+–) 28...Qc7 29.Ne4 Be7 30.Qd3 f5 31.Ng3 White fights for the Initiative 31...Nc5? (better 31...g6!?=) 32.Qf5+– Bf6 33.Nh5 Qd6 (33...Na4 34.Qg6 Qf7 35.Nf6 Qf6 36.Qe8 Qf8 37.Qe5 Nb2 38.Qb2+–) 34.Nf6 (34.Ba3 Kf7 35.Nf6 gf6 36.Bc5 Qc5+–) 34...gf6 (better 34...Qf6 35.Qc8 Kh7+–) 35.Qg6 Kf8 36.Qh6 Ke7 37.Qh7 Ke6 38.Qc2 (better 38.Ba3!? cb5 39.cb5 b6 40.Bc5 Qc5 41.Qa7 Qd6+–) 38...e4 (better 38...Qd3!? 39.Qd3 Nd3+–) 39.Bd4 Nd3 40.f3 c5 41.fe4 cd4? (41...Nb4 42.Qb3 Ke7+–) 42.Qd3 de3 (42...Qg3 43.Qd4 Qb8 44.c5+–) 43.Qd6 (43.Qd5!? Ke7 44.Qb7 Kf8 45.Qa8 Ke7 46.Qa7 Ke8 47.Qe3 Qd1 48.Kh2 Qa4+–) 43...Kd6 44.Kf1 Ke5 45.c5 Ke4 (45...f5 46.ef5 Kf5 47.g4 Ke5 48.g5+–) 46.c6 bc6 47.bc6 e2 48.Ke2 Kd5 49.c7 (49.c7 Ke5 50.c8Q+–) 1–0. BeepBeepImAJeep (2615) – Lucretio (2015), lichess.org, 2016.

4.e3 Rb8 5.c4 Qc7 6.a4 Ngf6 7.Nf3 g6 (7...e5 8.Nc3=) 8.Be2+= Bg7 9.0–0 0–0 10.d4 e5 11.Nbd2 Re8 12.de5 de5 13.Qc2 Nc5 Black prepares the advance e4 14.Rad1 (better 14.e4!?=) 14...Bf5=+ Black intends e4 15.Qc1 Nd3 (15...e4 16.Nd4 Ng4 17.g3 Na4 18.Nf5 Bb2 19.Qc2 gf5 20.Qa4=+) 16.Qa1 Will e5 fall? (16.Bd3 Bd3 17.Rfe1 Rbd8=+) 16...Nb2=+ 17.Qb2 e4 18.Nd4 Bd7 (18...Ng4 19.Bg4 Bg4 20.Rb1–/+) 19.Qc1 c5 20.N4b3 b6 21.a5 Bg4 22.Rfe1 h5 23.h3 Be2 24.Re2 Rbd8 25.Nf1 Rd1 26.Qd1 Rd8 27.Rd2 Rd2 28.Qd2 g5 29.Ng3 Qe5 (29...h4 30.Nf5 Qe5 31.Ng7 Kg7 32.ab6 ab6=) 30.ab6+– ab6 31.Qd8 Kh7 32.Qb6 h4 33.Nf1 g4? (better 33...Bf8+–) 34.hg4 (34.Qc5 Nd7 35.Qe5 Ne5+–) 34...Ng4 (34...Qg5 35.Qc5 Qg4 36.Nd4+–) 35.Qc5 (35.Nc5?! Qf5 36.Ne4 Qe4+–) 35...Qe6 (35...Qc5 36.Nc5 Ne5 37.Nd2+–) 36.Qh5 Kg8 37.Qh4 (37.Nd4 Nf6 38.Ne6 Nh5+–) 37...Bf6 (37...Qc4 38.Nbd2 Qe6 39.b6+–) 38.Qg3 (38.Qh5 Ne5 39.Nfd2 Nc4+–) 38...Kf8 (38...Be5 39.Qh3 Qf5 40.f3 ef3 41.Qf3+–) 39.Nc5 (39.Nd4!? Qd7+–) 39...Qf5 40.b6 Be5 Do you see the mate threat? 41.f4 ef3 42.Qf3 Qh5 (42...Qc8 43.b7 Qc5 44.Qg4 Ke7+–) 43.Nd7 Ke7 44.Ne5 Qe5 45.Qg4 Qe3 46.Ne3 f5 (46...Kd6 47.Qf4 Kc5 48.b7 Kb4 49.b8Q Kc3 50.Qfd6 f5 51.Qbb4) 47.Qf5 Kd6 48.Qd5 (48.b7 Kc7 49.Qc8 Kd6 50.b8Q Ke7 51.Nd5 Kf7 52.Qg8) 48...Ke7 49.b7 Kf6 50.b8Q Kg7 51.Qb6 (51.Qbg8 Kf6 52.Qgf7) 51...Kf8 52.Qa8 (52.Qa8 Ke7 53.Nd5 Kd7 54.Qac6; 52.Qf6 Ke8 53.Qde6) 1–0. BeepBeepImAJeep (2650) – skopje123 (2585), lichess.org, 2015.

3.b5 Nf6

4.a4 cb5 (4...e5 5.Nf3=+) 5.ab5= Bd7 6.c4 e6 7.e3 Qc7 8.Nf3 Be7 9.Be2 0–0 10.0–0 e5 11.d4 Be6 (11...e4!? 12.Nfd2 d5+=) 12.de5+– de5 13.Be5 Qc5 14.Bd4 Qc7 (14...Qc8 15.Nbd2+–) 15.Nbd2 (better 15.b6!? Qc8 16.ba7+–) 15...Nbd7+– 16.Qc2 Rac8 (better 16...a6!? 17.ba6 ba6+–) 17.Ra7+– Ne5?? (17...Bc5 18.Bc5 Nc5+–) 18.Be5 Bd6 (18...Qb6 19.Rfa1+–) 19.Bd6 Qd6 20.Ne4 Qe5 (20...Ne4 21.Qe4 h6+–) 21.Ne5 (21.Ne5 Ne4 22.Qe4+–) 1–0. BeepBeepImAJeep (2625) – simy712 (1750), lichess.org, 2016.

4.bc6 Nc6 5.e3 g6 (5...e5 6.Nf3=+) 6.Nc3 (6.Bf6 ef6 7.Nf3 Be6=) 6...Bg7 7.Nf3 0–0 8.Be2 Be6 9.0–0 Qb6 10.a3 Qb2 (10...Rac8!?=) 11.Na4+– Ne4? (better 11...Qa1 12.Qa1 Rab8+–) 12.Nb2+– Bb2 13.Rb1 Bg7 (13...Ba3 14.c3 d5 15.Rb7+–) 14.Rb7 Rad8 (14...Rab8 15.Rc7 Rfc8 16.Rc8 Bc8 17.d4+–) 15.Rb1 (15.Bb5!? Rc8+–) 15...d5 16.Bd3 (16.Bb5 Na5+–) 16...f5 (16...Bg4 17.h3 Bf3 18.gf3+– (18.Qf3?! Nd2 19.Qf4 Nf1 20.Bf1 e6+–)) 17.Qe2 Rf7 18.Kh1 Rdf8 (18...Bd7 19.c4 e6 20.Rfc1+–) 19.Nd4! Nd4 (19...Nd4 20.ed4 Combination; 19...Bd4 20.ed4 Combination) 20.ed4 Bd4 21.f3 Ng5 (21...Nc5 22.c3 Bg7 23.Bc2+–) 22.h4 h6 (22...Ne4 23.fe4 (23.Be4?! fe4 24.fe4 Rf4 25.Rf4 Rf4+–) 23...fe4 24.Rf7 Bf7 25.Ba6+–) 23.hg5 hg5 (23...Bd7+–) 24.Qe6 Kg7 25.g3 Rh8 (25...Rd8 26.Rb7 Rd6 27.Qc8+–) 26.Kg2 Kf8 (26...Bf6 27.Qd5 Rff8 28.Rh1 Rh1 29.Rh1+–) 27.Rh1 (27.Rb8 Kg7 28.Rh8 Bf2 29.Rfh1 Bg3 30.R1h7) 27...Rg8 28.Rb8 (28.Rh7 Rh7 29.Rb8 Kg7 30.Rg8 Kh6 31.Qg6) 28...Kg7 29.Rg8 (29.Bf5 Rb8 30.Rh7 Kh7 31.Qf7 Bg7 32.Qg6 Kg8 33.Be6 Kh8 34.Qh5 Bh6 35.Qh6) 29...Kg8+– 30.Qg6 (30.Qg6 Bg7 31.Rb1 Rf8 32.Qe6 Rf7 33.Rb8 Bf8 34.Bf5 g4 35.Qg6 Rg7 36.Be6 Kh8 37.Rf8 Rg8 38.Rg8) 1–0. FeegLood (2750) – juanfer90 (2125), lichess.org, 2016.

4.e3 c5 5.c4 e5 6.a4 (6.d4 ed4 7.ed4 Be7=) 6...Be7 7.Nf3 (7.Be2 a6=) 7...Be6 (7...0–0 8.d3=) 8.Be2= Nbd7 9.0–0 0–0 10.d4 e4 (10...ed4 11.ed4 d5 12.Nc3=) 11.Nfd2 cd4 12.Bd4 Nc5 13.Nc3 d5 14.cd5 Nd5 15.Nce4 Ne4 16.Ne4 a6 17.Nc5 Qc8 (17...Bc5!? 18.Bc5 Nc3+–) 18.Rc1+– ab5 (18...Bc5 19.Rc5 Qd7 20.ba6 ba6 21.Ra5+–) 19.Bb5 Bg4 (19...Bc5 20.Bc5 Rd8 21.Be7 Ne7 22.Rc8 Rdc8 23.e4+–) 20.f3 Bh5? (20...Be6+–) 21.Nd7 Qd8 22.Nf8 (22.Qb3!? Nc7 23.Bb6 Bd6+–) 22...Bf8 23.e4 Nf6 24.Be3 (24.Qd3 Bb4+–) 24...Qa5 (24...Bd6 25.Qe1+–) 25.Qd2 Qd2 26.Bd2 Bg6 (26...Bd6 27.Rfd1 Ba3 28.Rc3+–) 27.Be3 (27.Rc7 Rb8+–) 27...Rd8 (27...Ne8 28.Rfd1+–) 28.Bc5 (28.Rfd1!? Rb8+–) 28...Bc5 29.Rc5 Nd7 (29...h5+–) 30.Rd1 (30.Rd1 f5 31.Bd7+–) 1–0. BeepBeepImAJeep (2680) – filx95 (2110), lichess.org, 2017.

3.Nc3 Nf6

4.e3 e5 5.d4 Nbd7 6.a3 Be7 7.Nf3 0–0 (7...e4 8.Nd2= d5 9.Be2 0–0 10.0–0 Qc7 11.h3 Bd6 12.b5) 8.Be2 (8.Bd3 a5= (8...Qc7 9.0–0 a5 10.Qc1 b5 11.h3 Nb6 12.Rd1) 9.0–0 Qc7 10.Re1 d5 11.e4 ed4 12.Nd4) 8...Qc7 (8...e4 9.Nd2= d5 10.Nb3 Bd6 11.0–0 Qc7 12.g3; 8...a5 9.0–0 e4 10.Ng5 d5 11.Qd2 b5 12.h4) 9.0–0 (9.e4 a5= (9...h6 10.0–0 Nb6 11.Qd3 Be6 12.Nd2) 10.0–0 b5 11.Qd2 Bb7 12.h3) 9...e4=/+ 10.Nd2 d5 11.Nb3 (11.b5 Bd6 12.h3) 11...Bd6 12.h3 (12.g3+= –0.49) 12...Re8 13.b5 Nf8 (13...a6 14.a4+=) 14.bc6 bc6 15.Na4 (15.Rb1 Qe7+=) 15...Qe7=/+ 16.Nac5 N6d7 (16...Bc7 17.Na6 Ba6 18.Ba6+=) 17.Na4 (17.c4!?=) 17...Bc7 18.g3 (18.c4 Nb6 19.Nb6 ab6–/+ (worse is 19...Bb6 20.cd5 cd5 21.Rc1=)) 18...Nf6 (18...Nb6 19.Nb6 ab6 20.Kg2–/+) 19.Kg2=/+ Ne6 20.Rh1 Rb8 21.Bc1 Bd6 22.Na5 Bd7–/+ 23.c4 Ng5 24.c5 Bc7 25.Nb3 Be6 26.h4–/+ Nf3 27.Nd2 Nd2 28.Bd2 Qd7 29.Ra2 Bg4 30.Bc3 h5 31.Qd2? Qf5 32.Qd1–/+ Be2 33.Qe2 Rb3 34.Rc1 Reb8 35.Bb4 Ng4 36.Re1 Qg6 37.Bc3 Nh6 38.Rg1 Re8 39.Qd1 Reb8 40.Qe2 Nf5 41.Kh3?? Rb1–+ 42.Be1 R8b3 43.Rg2 Qe6 44.Kh2 Nh4 45.Kh1 Nf3 46.Rh2 Re1 47.Qe1 Ne1–+ 0–1. Sviridov,Valentin – Antonov,Vladimir, Hornicky Kahanec, 1980.

4.e4 e5=.

3.c4 a5

4.b5 a4 5.e3 (5.Nc3 a3 6.Bc1 Nf6=) 5...Nd7 (5...cb5 6.cb5 Nd7 7.d4=) 6.Nf3 (6.Nc3 Ngf6+=) 6...Ngf6 7.Be2 e5 (7...cb5 8.cb5 g6 9.0–0=) 8.Qc2 (8.Nc3 Be7+=) 8...c5 (8...cb5 9.cb5 Be7 10.0–0=) 9.0–0 Be7 10.d4 a3 (10...ed4 11.ed4 cd4 12.h3+=) 11.Na3 cd4 12.ed4 e4 13.Nd2 White plans c5 13...d5 14.Nab1 Nb6 15.a4 (15.cd5 Bf5 16.Nc3+–) 15...Bf5 (better 15...Nc4!? 16.Nc4 dc4+–) 16.c5+– Nbd7 17.c6 bc6 18.bc6 Nb6 (better 18...Nf8 19.c7 Qc8+–) 19.c7 Qc8 20.Qc6 Nbd7 21.Nc3 0–0 22.Nd5 (22.Rfc1 Ra7 23.Nd5 Nd5 24.Qd5 g6 25.Ne4 Rc7+–) 22...Nd5 23.Qd5 Nf6 (23...Be6 24.Qe4 Qc7 25.d5+–) 24.Qe5 Kh8?? (24...Re8 25.Bb5 Bd7+–) 25.Qe7 Re8 (25...Nd5 26.Qe5 Qe6 27.Rfc1 Qe5 28.de5+–) 26.Qc5 (26.Qc5 Qb7 27.Bb5+–) 1–0. onur604 (2320) – rakillo (2025), lichess.org, 2020.

4.b5 cb5 5.cb5 Nd7 6.d4 Nb6 7.e3 Nd5 (7...d5 8.Bd3=) 8.Nf3 (8.e4 Nb6+=) 8...h6 (8...Ngf6 9.Nc3+=) 9.Bc4 Nb6 10.Bd3 a4 11.0–0 Nf6 12.Nbd2 e6 13.Rc1 a3 (13...d5 14.Ne5+–) 14.Ba1 (14.Bc3 Nfd5+–) 14...Be7+= 15.e4 Bd7 16.Qb3 e5 (16...d5!?+–) 17.de5+– de5 18.Be5 Be6 19.Qc2 Bd6?? (better 19...Rc8 20.Bc7 Qd7+–) 20.Bd6+– Qd6 21.e5 Qd8 22.ef6 Qf6 23.Qc5 Ba2 (23...Nd7 24.Qe3 0–0+–) 24.Rfe1 (24.Rfe1 Be6 25.Ne4+–) 1–0. GuestCQWF – GuestFLTS, freechess.org, 2019.

4.b5 d5 5.e3 e6 6.Nf3 dc4 (6...Nf6 7.Nc3+=) 7.a4 (better 7.Nc3+–) 7...Bb4?? (better 7...cb5 8.ab5 Nf6+–) 8.Bg7+– f6 (8...cb5 9.ab5 Nf6 10.Bh8+–) 9.Bh8 cb5 10.Nd4 (10.ab5 Nd7 11.Nc3 Nb6+–) 10...ba4 (10...Nc6 11.Nb5 Kf8 12.f4+–) 11.Qh5 (better 11.Bc4 Qc7 12.Qa4 Kf8+–) 11...Kd7 (11...Kf8 12.Bc4 Qe7 13.Ra4+–) 12.Bc4 Nc6 13.Qh7 (13.Ne6 Qe7 14.Bg7 Qd6+–) 13...Kd6 14.Nb5 Kc5 15.0–0 Kc4 (15...Bd7 16.Rc1 Qe7 17.Qd3+–) 16.Nc7 Ra7 (16...Kc5 17.Na8 Nge7 18.Bf6 Kb5 19.Nc3 Bc3 20.Be7 Ne7 21.dc3 Ka6+–) 17.Qc2 (17.Qc2 Bc3 18.Qc3) 1–0. GuestYBNP – GuestKTSH, freechess.org, 2019.

3.c4 a6

4.d4 Bf5 5.Nc3 Nd7 (5...Nf6 6.Nf3=) 6.e4+= Bg6 7.Bd3 e5 8.d5 c5 9.a3 Ngf6 10.Nge2 b6 11.Ng3 h5 (11...Be7 12.0–0+=) 12.h4 (12.0–0!?+/–) 12...Be7= 13.Qd2 (13.Nf5 0–0=) 13...Ng4 14.Be2 (better is 14.Nf5 Bf5 15.ef5 Bh4 16.Ne4=) 14...0–0 (better is 14...Bh4 15.Bg4 hg4=+) 15.Bg4+/– hg4 16.h5 Bh7 17.Nf5 (better is 17.Qe2!?+/–) 17...Bg5 18.Qe2 Nf6 19.Nd1 (19.h6 Bf5 20.hg7 Kg7 21.ef5 Rh8+=) 19...Bf5 20.ef5 Re8 21.Ne3 Be3 22.Qe3 Kh7 (22...Qc8 23.Qg5 Ne4 24.Qg4+/–) 23.Kd2 (23.bc5 bc5 24.h6 Rb8+/–) 23...cb4 24.ab4 b5 25.Rhc1?? bc4–/+ 26.Rc4 Nd5 27.Qe4 Nf6 28.Qe2 d5 29.Rc6 Ne4 30.Kc2? Qg5 31.Rd1 Qf5 32.Kc1?? Qf2 33.Qf2 Nf2 34.Rd5 f6 35.Rd7 Red8 36.Rcd6 Rd7 37.Rd7 Ne4 38.Kc2 Rc8 39.Kd3 Ng5 40.Rd6 Rb8 41.Bc3 Ra8 42.Bd2 Nf7 43.Rd7 Rd8 44.Rd8 Nd8 45.Kc4 g5 46.Kc5 a5?? 47.ba5+– Nb7 48.Kb6?? Na5= 49.Ka5 Kh6 50.Kb5 Kh5 51.g3 f5–+ 52.Kc4 f4 53.Be1 e4 54.Kd4 ½–½. alaamattar (2190) – sportingmad (2010), net–chess.com, 2006.

4.e3 Nf6 5.Nf3 Bg4 6.Be2 e6 7.Nc3 g6 8.h3 Bf3 9.Bf3 Bg7 10.0–0 0–0 11.d4 d5 12.a4 Qb6 13.Qb3 Nbd7 14.a5 Qc7 15.Rfe1 dc4 16.Qc4 Nd5 (better is 16...Ne8!?+/–) 17.Nd5+– ed5 18.Bd5! Nf6 (18...cd5 19.Qc7 Pinning (19.Qc7 Deflection)) 19.Bf3 Rad8 20.e4 Rfe8 21.g3 Qe7 22.Kg2 Rd7 23.Bc3 Red8 24.d5! cd5 25.ed5 Qd6 26.Be5 Qf8 27.Rad1 Rc8 28.Qb3 Qd8 (28...Ne8 29.Bf4 Nd6 30.Rc1+–) 29.d6 Ne8 (29...h6+–) 30.Bg4 Be5 (30...Bf8 31.Re4 Rc6 32.Bd7 Qd7+–) 31.Re5 Rd6 32.Re8! Qe8 33.Rd6 Rd8 (33...Rc7 34.Qd5 Kg7 35.Qd4 Kh6 36.Qf4 Kg7 37.Re6+–) 34.Rb6 1–0. Janek – Mahmoud, internet, 2016.

3.c4 Qb6

4.a3 a5 5.Qa4=.

4.a3 a6 5.e3 c5 6.b5 (6.Nc3 Nf6=) 6...ab5 7.cb5 Bd7 8.Nc3 Nf6 9.Nf3 Bg4 10.Be2 Bf3 11.Bf3 Nbd7 (11...e6 12.e4=) 12.0–0 (12.a4 Ne5 13.Be2 e6+=) 12...Ne5 (12...e6 13.d4=) 13.Be2+= d5 (13...e6 14.d4 Ng6 15.dc5 dc5 16.Rc1+/–) 14.a4 (14.Nd5 Nd5 15.Be5 e6+–) 14...e6 (better is 14...Ng6!?+=) 15.Nd5!+/– Nd5 (15...ed5 16.Be5 Discovered attack; 15...Nd5 16.Be5 Discovered attack) 16.Be5 f6 17.Bb2 Qc7 18.Qb3 (18.Bh5 Kd8+–) 18...b6 (18...Bd6 19.f4+–) 19.e4 Nf4 20.Bf3 (20.Bc4 Qd7+–) 20...e5+/– 21.g3 (21.Qc4 Qd6+/–) 21...Nh3 (21...c4 22.Qc2 Nd3 23.Bh5 g6 24.Be2+/–) 22.Kh1 Bd6?? (better is 22...Ng5+/–) 23.Qe6+– Qe7 24.Qh3 h5 25.Qf5 h4 26.Bh5 Kf8 27.Bg4 hg3 28.fg3 Kf7 29.Rf2 g6 30.Qf3 Rh2 31.Rh2 f5 32.ef5 Kg7 33.fg6 Rh8 34.Rh8 Kh8 35.Qf7 Qf7 36.gf7 Kg7 37.Be6 Kf8 38.g4 Ke7 39.Bd5 Kf8 40.g5 Kg7 41.Rg1 1–0. Fournier,Frederic – piecefighter, Active (5/0), 2005.

4.a3 e5 5.e3 Nf6 6.d4 c5 7.Nf3 cb4 8.Qa4 Nc6 (better is 8...Bd7!? 9.Qb4 Qb4 10.ab4 e4=) 9.d5+/– Be7? (better is 9...Qa5!? 10.Qa5 Na5 11.ab4 Nb3+/–) 10.dc6+– bc6 11.ab4 Nd7 (11...0–0 12.Be2+–) 12.Bd3 0–0 13.0–0 Bb7 (13...f5 14.Rd1+–) 14.Nbd2 Nc5 (14...Rfb8+–) 15.bc5 Qb2 (15...Qc5 16.Rfb1 Qb6 17.Be5+–) 16.Rfb1 Qc3 (16...Qa1 17.Qa1 Rfb8 18.cd6 Bd6 19.Ne5 Be5 20.Qe5+–) 17.Ra3 Qa3 18.Qa3 Bc8 19.cd6 Bd8 (19...Bf6 20.Qc5 Be6 21.Ne4+–) 20.Be4 a5 21.Ne5 Be6 22.Bc6 Rc8 23.Bd7 (better is 23.Bb7 Rb8 24.Nc6 Bf6 25.Nb8 Rb8 26.Qa5 h6+–) 23...Bd7 24.Nd7 Re8 25.Nf6! gf6 (25...Bf6 26.d7) 26.d7 Re3 1–0. PassedPawn – Tricky.1, ChessWorld.net, 2005.

3.c4 Qc7

4.a4 e5 5.e3 Nf6 6.b5 Be7 7.Nf3 0–0 8.Be2 Bg4 (8...e4 9.Nd4=+) 9.0–0= Nbd7 10.d4 h6 11.de5 (11.Nc3 Rfe8=) 11...de5 12.Nc3 Rad8 13.Qc2 Rfe8 14.h3 Bh5 15.Nh4 Nc5 16.Nf5 Bg6 17.Ne7 (better 17.Rfd1=) 17...Qe7–+ 18.e4 Nce4 (18...Nfe4!? 19.Ne4 Be4 20.Qc3–+) 19.Ne4–/+ Be4 20.Qb3 Nd7 (20...Rd2 21.Rfe1–/+) 21.Ba3? (better 21.Qe3!? Nc5 22.Ba3=) 21...Qf6 22.Qe3 b6?? (better 22...Qg6 23.f3 Bf5–/+) 23.Qe4+– c5 24.Rad1 Nf8 25.Bb2 Ng6 26.Rd8 Rd8 (26...Qd8 27.Rd1 Qg5 28.Bg4+–) 27.Rd1 Re8 28.Rd5 Qe7 (28...Qf4 29.Bf3+–) 29.Bd3 (better 29.Bh5 Qf6 30.Bg6 Qg6 31.Qg6 fg6 32.Rd7+–) 29...Nf4 (29...Kf8+–) 30.Re5 (30.Qh7 Kf8 31.Qh8) 30...Nh3 (30...Qe5 31.Be5 Nd3 32.Qd3 Re5+–) 31.gh3 (31.gh3 Qg5 32.Rg5 Re4 33.Rg7 Kf8 34.Be4 Ke7 35.Bd5 Kd7 36.Rf7 Ke8 37.Bf6 h5 38.Rg7 h4 39.Be6 a6 40.Rg8) 1–0. BeepBeepImAJeep (2570) – DET_UA (1885), lichess.org, 2017.

4.a4 Bg4 5.Nf3 Bh5 6.e3 Nd7 7.b5 e5 8.Be2 Ngf6 9.0–0 Be7 10.d4 0–0 11.Nc3 a5 12.Rc1 Rfd8 13.Nd2 Be2 14.Qe2 Re8 15.de5 (15.d5 Rac8+=) 15...de5= 16.Rfd1 Nc5 17.Ba3 (17.e4 Rad8=) 17...Rad8 (better 17...Na4!? 18.Na4 Ba3–/+) 18.Bc5= White launches an attack 18...Bc5 19.Nde4 Be7 (19...Ne4 20.Ne4 Ba3 21.Ra1=) 20.Nf6 Bf6 21.Ne4 Be7 22.Qg4 h6 23.Ng3 Rd1 (23...g6 24.Rb1=) 24.Rd1+= Rd8 25.Rc1 Qd7 (25...g6 26.Rd1=) 26.Nf5+= Do you see the mate threat? 26...Bf8 (26...g6 27.Nh6 Kg7 28.bc6 bc6 29.Qd7 Rd7 30.Ng4=) 27.Nh6+– Kh7 28.Nf5 g6 29.e4?? (better 29.Qh4 Kg8 30.Ng3+–) 29...gf5–+ 30.ef5 Qd6 (30...Qd2 31.Rf1–+) 31.h3 Bh6 32.Re1 (32.Qh5 Qf6–+) 32...Qf6 (32...Qd2 33.Kf1–+) 33.Re4 (33.Qf3 Rd4 34.Re4 Rd2–+) 33...Rd4 (33...Rd2 34.bc6 bc6 35.Qh5–+) 34.Qf3 Re4 (34...Rd2 35.Re1–/+) 35.Qe4–/+ Qd6 (35...Bd2 36.h4–/+) 36.f6 Kh8 37.Qh4 (37.Qg4!? cb5 38.cb5–/+) 37...Qd2 38.Qg4?? (38.g3 Qc1 39.Kg2 Qg5–+) 38...Qc1 (better 38...Qe1 39.Kh2 Bf4 40.g3 Qf2 41.Kh1 Qg3 42.Qg3 Bg3–+) 39.Kh2 Qf4 40.g3? (better 40.Qf4 Bf4 41.g3–+) 40...Qg4 41.hg4 Bc1 42.f4 (42.bc6 bc6 43.f3 Kh7–+) 42...cb5 43.cb5 ef4 44.gf4 Bf4 45.Kh3 Bg5 46.Kg3 Bf6 47.Kf3 Kg7 48.Ke4 Kg6 49.Kf4 Bd8 50.Ke4 Bb6 51.Kf3 Kg5 52.Kg3 f5 53.Kf3 (53.gf5 Kf5 54.Kh4–+) 53...fg4 54.Kg2 Kf5 (54...Kf4 55.Kf1 Kf3 56.Ke1 g3 57.Kd1 g2 58.Kc1 g1Q 59.Kb2 Qd4 60.Kb3 Qd3 61.Kb2 Bd4 62.Kc1 Ke2 63.b6 Qd1) 55.Kf1 (55.Kg3 Bc7 56.Kg2–+) 55...Ke5 56.Kg2 Kd5 (56...Kf4 57.Kf1 Kf3 58.Ke1 g3 59.Kd1 g2 60.Kc1 g1Q 61.Kd2 Qd4 62.Kc2 Qc4 63.Kb2 Bd4 64.Kb1 Qb3 65.Kc1 Be3) 57.Kf1 Kc4 58.Kg2 Kb4 59.Kg3 Ka4 60.Kg4 Kb5 61.Kf3 Kc4 62.Ke2 Kb3 63.Kd1 Ka2 (63...a4 64.Ke2 a3 65.Kf1 a2 66.Ke1 a1Q 67.Ke2 Qc3 68.Kd1 Qf3 69.Kd2 Ba5 70.Kc1 Qf1) 64.Kd2 a4 65.Kc2 a3 66.Kc1 Ba5 67.Kc2 Bc3! 68.Kc1 (68.Kc3 Deflection from b1 68...Kb1) 68...Bb2 69.Kc2 Ka1 70.Kd2 Kb1 71.Kd3 a2 72.Kc4 a1Q 73.Kb5 (73.Kd5 Qa4 74.Ke6 Qe4 75.Kf7 b6 76.Kf8 Qh7 77.Ke8 Bf6 78.Kf8 Qe7 79.Kg8 Qg7) 73...Qa4 (73...Qa6 74.Kb4 b6 75.Kb3 Qb5) 74.Ka4–+ Bc3 (74...Bd4 75.Kb3–+) 75.Kb5 ½–½. BeepBeepImAJeep (2600) – Corksucker (2085), lichess.org, 2017.

4.e3 e5 5.Nc3 Nd7 6.Nf3 Be7 7.d4 Ngf6 8.Bd3 0–0 9.0–0 Re8 10.Qb3 Bf8 (better 10...ed4 11.ed4 a5=) 11.a4?? (better 11.Qc2+=) 11...e4–+ 12.Ne4 Ne4 (12...Re4?! 13.Be4 Ne4 14.d5=+) 13.a5 Nef6 (13...Ndf6 14.d5–+) 14.Qc2 White plans c5 14...h6 15.e4 Kh8 16.c5 dc5 17.bc5 Ng8 (17...Kg8 18.Rfb1–/+) 18.Bc4 Ndf6 (18...Re7 19.Bc1–/+) 19.Ne5 Be6 20.Rfe1 Rad8 21.a6 Bc4 22.Qc4 Re5 (22...Re7 23.ab7 Qb7 24.Bc3=) 23.de5= Nd7 (23...Ng4!?=) 24.Qf7+= Qc8 (24...Qb8 25.ab7 Nc5 26.e6+–) 25.Rac1 (better 25.ab7!? Qb7 26.Reb1 Nc5 27.Qb7 Nb7 28.Ra7+–) 25...Nc5= 26.Rc5 (26.ab7 Qb8=) 26...Bc5 27.e6 Bf8 28.ab7 Qb8 29.h3 Re8? (29...Ne7 30.Rb1 Kh7+–) 30.Be5! Qe5 31.Qe8 Bd6 32.Qc6 Ne7 (32...Qh2 33.Kf1 Qh1 34.Ke2+–) 33.Qe8 Kh7 34.b8Q! Qh2 (34...Bb8 35.Qe7 Deflection) 35.Kf1 Bb8 36.Qe7 Qh1 37.Ke2 Qg2 38.Qb4 Bg3 (38...a5 39.Qb5 (39.Qb8?! Qe4 40.Kd2 Qd4 41.Kc2 Qc4 42.Kb2 Qd4 43.Kb3 Qd3 44.Ka4 Qc4 45.Ka5 Qa2 46.Kb6 Qf2 47.Kc6 Qe1+–; 39.Qa5?! Qe4 40.Kd1 Qb1 41.Kd2 Bf4 42.Re3 Qb2 43.Kd3 Qb1 44.Ke2 Be3 45.fe3 Qe4+=) 39...Qe4 40.Kd1 Qf3 41.Kc2+–) 39.Qd4 Bh4 40.Ra1 Qh3 41.Ra7 Qg4 42.Kf1 Qh3 (42...Qg5 43.e7 Qb5 44.Ke1 Qb1 45.Kd2 Bf2 46.Qd3 Qb2 47.Kd1 Ba7 48.e5 g6 49.e8Q Qa1 50.Ke2 Qa2 51.Qd2 Qa6 52.Kf3 Qf1 53.Kg3 Qg1 54.Qg2 Qe1 55.Kh3 Qe3 56.Qg3+–) 43.Ke1 Qh1 44.Ke2 Qg2 45.e7 Bf2 46.Qf2 Qe4 47.Qe3 Qg2 (47...Qc2 48.Kf3 Qf5 49.Qf4 Qd3 50.Kf2 Qc2 51.Kg3 Qg6 52.Qg4 Qd6 53.Kh3 Qd3 54.Kh2 Qd2 55.Qg2 Qd6 56.Qg3 Qd2 57.Kh3 Qd5 58.e8Q Qh1 59.Kg4 Qd1 60.Qf3 Qg1 61.Kh3 Qh1 62.Qh1 h5 63.Qh5 Kg8 64.Qa8) 48.Kd3 Qd5 49.Qd4 Qb5 50.Kd2 Qg5 51.Kc2 (51.Kc2 Qg2 52.Kb3 Qg6 53.e8Q Qb1 54.Kc4 Qc1 55.Kd5 Qh1 56.Qde4 Qe4 57.Qe4 Kg8 58.Ra8 Kf7 59.Qe6) 1–0. DEFFM – GuestRHBT, freechess.org, 2018.

4.e3 e5 5.Nf3 Bg4 6.Be2 Nf6 7.d3 Be7 8.Nbd2 0–0 9.h3 Bh5 10.0–0 h6 11.a3 Re8 0–1. Fournier,Frederic (1620) – chessfreek, Partie evaluee, 2007.

3.c4 Nd7

4.a4 e5 5.e3 Ngf6 6.b5 Be7 7.Nc3 0–0 8.Nf3 Qc7 9.Be2 d5 10.d4 e4 11.Nd2 a6 12.Rc1 ab5 13.ab5 Qb6 (13...Qd6 14.cd5 cd5 15.0–0=) 14.c5 Qc7 15.b6 Qb8 16.0–0 Re8 17.Qc2 Nf8 18.Ra1 Ng6 19.Ra8 White gets strong initiative 19...Qa8 20.f3 Bf5? (better 20...ef3!? 21.Nf3 Ng4+=) 21.fe4+– Be4 22.Nde4 Ne4 23.Ne4 de4 24.Bc4 Bf6 25.Qb3 Re7 26.Ra1 Qd8 27.Qa2 h5 28.Qa8 Rd7 29.Qd8 Bd8 30.Ra7 Ne7? (30...Nf8 31.Kf1+–) 31.Bb3 (better 31.Ba6!? Kf8+–) 31...g6 32.Bc2 f5? (32...Nd5 33.Be4 Bg5 34.Bd5 Be3 35.Kf1 Rd5 36.Rb7 Rf5 37.Ke1 Rf2+–) 33.Bb3 Kg7 (33...Nd5 34.Bd5 Rd5 35.Rb7 Bg5+–) 34.Be6 Rd5 35.Bd5 Nd5 36.Rb7 Kf6 (36...Kf8 37.Rd7 Nb6 38.cb6 Bb6 39.Ba3 Ke8 40.Rg7+–) 37.Kf2 (better 37.Rd7 Bb6 38.cb6 Nb6 39.d5 Kg5 40.dc6 f4+–) 37...Ne3 (37...Ke6 38.Rg7 Ne7+–) 38.Ke3 Ke6 39.d5! Kd5 A deflection (39...cd5 40.Rg7) 40.Rd7 A double attack 40...Kc5 41.Rd8 (41.Bd4 Kc4 42.Rd8 f4 43.Ke4 Kb5 44.b7 Ka4 45.Ra8 Kb3 46.Kd3 f3 47.b8Q) 41...Kb6 42.Be5 c5 (42...Kb5 43.Rg8 c5 44.Rg6+–) 43.Rc8 (43.Rd6!? Ka5+–) 43...Kb5 44.Bd6 (44.Rg8!? h4+–) 44...c4 45.Rc5 Kb4 (45...Kb6 46.Rc4 h4 47.Rc7+–) 46.Rf5 Kb3 47.Rb5 Kc3 48.Be5 Kc2 49.Rc5 Kb3 50.Ke4 Kb4 51.Kd4 c3 52.Rc3 Kb5 53.h4 g5 54.hg5 h4 (54...Kb4 55.g6 Kb5 56.g7 h4 57.Rb3 Ka4 58.g8Q h3 59.Qc4 Ka5 60.Qb5) 55.Bh2 (55.Rb3 Kc6 56.g6 h3 57.gh3 Kd7 58.g7 Ke7 59.Rb7 Ke6 60.g8Q Kf5 61.Qg4) 55...h3 (55...Kb4 56.g6 Kb5 57.g7 Kb4 58.Bd6 Kb5 59.g8Q Ka4 60.Qc4 Ka5 61.Bc7) 56.gh3 Kb4 (56...Kb6 57.Bc7 Kb5 58.g6 Ka4 59.g7 Kb5 60.g8Q Ka6 61.Qa8 Kb5 62.Qa5) 57.h4 Kb5 58.Bg3 (58.g6 Kb6 59.g7 Kb5 60.Rb3 Kc6 61.g8Q Kd7 62.Qf7 Kc6 63.Qe6) 58...Kb4 (58...Ka5 59.Kc5 Ka6 60.Kc6 Ka5 61.Bd6 Ka4 62.Ra3) 59.Bf2 (59.Bd6 Kb5 60.Kd5 Kb6 61.Rb3 Ka7 62.Kc6 Ka6 63.Ra3) 59...Ka4 (59...Kb5 60.g6 Kb6 61.Kd5 Kb7 62.g7 Ka6 63.Kc6 Ka5 64.Bc5 Ka4 65.Ra3) 60.Bg1 (60.Kc5 Ka5 61.Ra3) 60...Kb5 61.Bh2 (61.g6 Kb6 62.Kd5 Kb7 63.g7 Ka6 64.Kc6 Ka5 65.Bc5 Ka4 66.Ra3) 61...Kb4 62.h5 (62.Bd6 Ka5 63.Kc5 Ka4 64.h5 Ka5 65.Ra3) 62...Ka4 (62...Kb5 63.g6 Kb6 64.Bc7 Ka6 65.g7 Kb7 66.g8Q Ka6 67.Qa8 Kb5 68.Qa5) 63.h6 (63.Kc5 Ka5 64.Ra3) 63...Kb5 64.h7 Kb4 (64...Kb6 65.Rb3 Ka5 66.h8Q Ka4 67.Rb7 Ka5 68.Qa8) 65.h8Q Ka4 (65...Kb5 66.Qb8 Ka4 67.g6 Ka5 68.Ra3) 66.Qb8 Ka5 67.Ra3 1–0. BeepBeepImAJeep (2705) – Valentun_Hulka (2485), lichess.org, 2020.

4.a4 e5 5.e3 Ngf6 6.b5 Be7 7.Nc3 d5 8.cd5 cd5 9.Nf3 d4 (9...e4!? 10.Nd4 Ne5=) 10.ed4+= ed4 11.Nd4 0–0 12.Be2 Re8 13.Nf3 Bc5 14.0–0 Bb6 15.d4 Nd5?? (better 15...Nf8+–) 16.Nd5+– Bc7 17.Nc7 Qc7 18.Rc1 Qd6 19.Ne5 Nf6 20.Bc4 Nd5 (20...Be6 21.Qf3+–) 21.Qb3 (better 21.Nf7 Kf7 22.Qf3 Kg6 23.Bd5 Rf8+–) 21...Be6 22.Ba3 Qd7 (22...Qd8+–) 23.Nd7 (23.Nd7 Nf4 24.Qf3 Bd7 25.Qf4+–) 1–0. BeepBeepImAJeep (2675) – Ard_galen (2220), lichess.org, 2016.

4.a4 Ngf6 5.e3 e5 6.b5 Be7 7.Nf3 0–0 8.Be2 a6 (8...Rb8 9.0–0=) 9.0–0= ab5 10.ab5 Ra1 11.Ba1 Re8 12.d4 e4 13.Nfd2 Nf8 (better 13...cb5!? 14.cb5 d5=) 14.Nc3 d5 15.Qb3 (15.c5 b6+=) 15...Be6 16.c5 Ng6 17.f4 (17.Qa4 Qc7=) 17...ef3 18.Nf3 Ne4 19.Ne4 (better 19.Qb2=) 19...de4–+ 20.Bc4 (20.d5!? Qd5 21.Qc3–+) 20...Bc4 (20...ef3?! 21.Be6 fe6 22.bc6 bc6 23.Qe6 Kh8 24.Qc6 fg2 25.Kg2–/+) 21.Qc4 ef3 22.Rf3 Bf6 23.b6 (23.Bc3 Re4 24.Qd3 Qd5 25.bc6 bc6–+) 23...Qe7 24.g3 Qe4 25.Kf2 (25.Qe2 Ne7 26.Rf4 Qe6–+) 25...Rd8 (25...Ne5 26.Qe2 Nf3 27.Qf3–+) 26.Bc3 (26.Qa2 Ne7–+) 26...h5 (better 26...Ne5 27.Rf4 Qf4 28.gf4 Nc4–+) 27.Qe2 h4 28.Kg2 (28.Qb2–+) 28...hg3 29.hg3 Bg5 (29...Bd4 30.Bd4 Rd4 31.Kg1–+) 30.Bd2 (30.Qf2 Ra8–+) 30...f6 (better 30...Rd4 31.Kf2 Rd3–+) 31.Kf2 Re8 32.Qe1 Ne7 33.Qc1 Nd5 34.Qc4 Kf8 35.Qe2 f5 36.Kf1 (36.Qe1 Ke7–+) 36...g6 (36...Be3 37.Be3 Ne3 38.Re3 Qe3 39.Qe3 Re3 40.Kg2–+) 37.Qf2 (37.Kf2 Nf6 38.Kg1 Ng4–+) 37...Kg7 (37...Be3 38.Be3 Ne3 39.Re3 Qe3 40.Qe3 Re3 41.Kg2–+) 38.g4 (38.Ke2–+) 38...f4! 39.ef4 (39.Rf4 Bf4) 39...Bf4!! 40.Bf4 (40.Rf4 Nf4) 40...Nf4 41.Rf4 Qe7 (better 41...Qh1 42.Qg1 Qh3 43.Qg2 Re1 44.Ke1 Qg2–+) 42.Kg2 Rf8?? (better 42...Qe6+–) 43.Rf8+– Qf8 44.Qf8 Kf8 45.Kf3 Kf7 (45...Ke7 46.g5 Kd7 47.Kf4+–) 46.Kf4 (46.d5 cd5 47.c6 bc6+–) 46...Ke6 47.g5 Kd5 48.Ke3 Ke6 (48...Kc4 49.Ke4 Kb5 50.Ke5+–) 49.Ke4 Ke7 50.d5 (50.Ke5 Kd7 51.Kf6 Ke8 52.d5 cd5 53.c6 Kd8 54.cb7 Kd7 55.b8Q Kc6 56.Qc7 Kb5 57.b7 Ka6 58.b8Q d4 59.Qbb6) 50...Kd7 51.Ke5 cd5 52.Kd5 Kd8 (52...Ke7 53.c6 bc6 54.Kc6 Ke6+–) 53.c6 (53.Ke6 Ke8 54.c6 bc6 55.b7 Kf8 56.b8Q Kg7 57.Qb7 Kh8 58.Kf6 c5 59.Qg7) 53...bc6 54.Kc6 (54.Kd6 Ke8 55.b7 Kf8 56.b8Q Kf7 57.Qb7 Kg8 58.Ke6 Kh8 59.Kf6 c5 60.Qg7) 54...Kc8+– 55.b7 Kb8 56.Kd6 Kb7 57.Ke6 Kc8 58.Kf6 Kd8 59.Kg6 Ke8 60.Kh7 Kf8 61.g6 Ke7 62.g7 Kf6 63.g8Q Ke5 64.Qg6 Kd4 65.Kg7 Kd5 66.Kf7 Ke5 (66...Kc5 67.Qd3 Kc6 68.Ke6 Kb7 69.Qb5 Kc8 70.Kd6 Kd8 71.Qd7) 67.Qe6 (67.Qd3 Kf4 68.Ke6 Kg4 69.Qe3 Kh5 70.Qh3 Kg5 71.Qg3 Kh5 72.Kf5 Kh6 73.Qg6) 67...Kd4+– 68.Ke7 Kc5 (68...Kd3 69.Kd6 Kc3 70.Qe3 Kb2 71.Qd2 Ka3 72.Kd5 Kb3 73.Kd4 Ka3 74.Qc2 Kb4 75.Qb1 Ka4 76.Kc4 Ka5 77.Qb5) 69.Kd7 (69.Qe4 Kb5 70.Kd6 Kb6 71.Qb4 Ka6 72.Kc6 Ka7 73.Qb7) 69...Kd4 70.Qd6 (70.Kd6 Kd3 71.Kc5 Kc2 72.Kc4 Kd2 73.Kd4 Kc2 74.Qa2 Kd1 75.Kd3 Ke1 76.Qe2) 70...Kc4 71.Ke6 Kb5 (71...Kc3 72.Ke5 Kc2 73.Kd4 Kb2 74.Qh2 Kb3 75.Qg3 Kb2 76.Qc3 Kb1 77.Qd2 Ka1 78.Kc3 Kb1 79.Qb2) 72.Ke5 (72.Kd5 Ka4 73.Kc4 Ka5 74.Qb8 Ka6 75.Kc5 Ka5 76.Qb5) 72...Kc4 73.Qd5 (73.Qe6 Kb5 74.Kd4 Kb4 75.Qb6 Ka4 76.Kc4 Ka3 77.Qb3) 73...Kb4 (73...Kc3 74.Qd4 Kb3 75.Qd3 Kb2 76.Ke4 Ka1 77.Qa3 Kb1 78.Kd4 Kc2 79.Qa2 Kd1 80.Kd3 Ke1 81.Qe2) 74.Ke4 (74.Kd4 Ka4 75.Qb7 Ka5 76.Kc4 Ka4 77.Qb4) 74...Kc3 75.Qd4 (75.Qc6 Kb3 76.Kd3 Kb4 77.Qb6 Ka4 78.Kc4 Ka3 79.Qb3) 75...Kb3 (75...Kc2 76.Qc4 Kd2 77.Qb3 Ke2 78.Qb2 Kf1 79.Kf3 Ke1 80.Qe2) 76.Ke3 (76.Kd3 Ka3 77.Kc3 Ka2 78.Qf2 Ka3 79.Qa7) 76...Kc2 77.Qc5 (77.Qd3 Kb2 78.Kd2 Ka2 79.Kc2 Ka1 80.Qa6) 77...Kb3 (77...Kb2 78.Kd3 Kb3 79.Qb5 Ka3 80.Kc3 Ka2 81.Qb2) 78.Qb4 (78.Kd3 Kb2 79.Qb5 Ka3 80.Kc3 Ka2 81.Qb2) 78…Kb4= ½–½. BeepBeepImAJeep (2640) – vivalarevolussionne (2075), lichess.org, 2017.

4.a4 Ngf6 5.e3 e5 6.b5 Be7 7.Nf3 0–0 8.Be2 e4 9.Nd4 Nc5 (9...c5 10.Nf5=) 10.0–0 (10.bc6 Qc7 11.cb7 Qb7+=) 10...Re8 (10...Qc7 11.Nc3=) 11.Nc3 (11.bc6 d5+–) 11...Bf8 (11...Qc7!?=) 12.bc6+– bc6 13.a5 (better 13.Nc6!? Qd7 14.Nd4+–) 13...Qc7 14.Ba3 Nd3 (better 14...a6!?=) 15.Ne4!+– Ne4 (15...Re4 Decoy to e4 16.Bd3) 16.Bd3 c5 17.Nb5 Qd8 18.Qc2 Bb7 19.Bb2 a6 20.Nc3 Nc3 (20...Nf6!?+–) 21.Bh7+– (worse 21.Bc3 Qh4 22.Rfb1 Rab8+–; 21.Qc3?! Qg5 22.f3 Rab8+–; 21.dc3?! Qh4+=) 21...Kh8 22.Bc3 (worse 22.dc3 g6 23.Bg6 Qg5–/+) 22...Qg5 Threatening mate: Qxg2 23.f3 d5 24.cd5 Bd6 25.Be4 Qh6? (25...Bd5 26.Rab1 Kg8+–) 26.f4 Re4 (26...f5 27.Rab1 Reb8 28.Bf3+–) 27.Qe4 Rd8 (27...Qh5 28.Be5 Bf8 29.Rf3+–) 28.Rab1 Ba8 (28...Bc8 29.Rb6 Qh7 30.Qh7 Kh7 31.e4+–) 29.Rb6 (29.Rf3 Kg8 30.Rb6 Qh4+–) 29...c4 (29...Qh7 30.Qh7 Kh7+–) 30.Be5 (30.Be5 Qh5 31.Bd6 Qd5 32.Qd5 Bd5 33.Ra6+–) 1–0. BeepBeepImAJeep (2640) – Elda64 (2515), lichess.org, 2016.

4.a4 Ngf6 5.e3 g6 6.b5 Bg7 7.Nc3 0–0 8.Nf3 Qc7 (8...e5 9.d4=) 9.Be2 a6 10.d4 ab5 11.ab5 Ra1 12.Qa1 e5 13.de5 Ne5 14.0–0 Nf3 (14...Bg4 15.Ne5 de5 16.Bg4 Ng4 17.h3+=) 15.Bf3+= Re8 (15...Ne8 16.Qa4 Bd7 17.Qb4+–) 16.Rd1 (16.Ne2 Nh5+–) 16...Be6 (16...Bg4 17.Be2=) 17.Be2 (17.Nb1 Qe7+–) 17...Nd7 (17...Ng4 18.h3 Ne5 19.Ne4+–) 18.h3 (18.Ne4 Bb2 19.Qb2 d5 20.cd5 Bd5+=) 18...Nb6 19.bc6 bc6 20.c5 dc5 21.Nb1 Bb2 22.Qb2 c4 23.Qc1 Rd8 24.Nd2 Increasing the pressure on the isolated pawn on c4 24...Qd6 (24...Qe5 25.Nf3 Rd1 26.Qd1=) 25.Ne4 (better 25.Nc4!? Qc7 26.Rd8 Qd8 27.Ne5+–) 25...Qe7= 26.Nd2 (26.Rd8 Qd8 27.Qc3 Nd5=) 26...h5 (26...Qb4 27.Nf3 Rd1 28.Qd1=+) 27.Re1 Qb4 28.Ne4 f5 29.Ng5 Bd5 30.Rd1 (30.Bf3!?=+) 30...c3–/+ 31.Bf3 Na4 (31...Rd7 32.Re1 Bf3 33.Nf3–/+) 32.Ne6? (better 32.e4!? fe4 33.Be4=) 32...Rd6–/+ 33.Nd4 Qb2 34.Qc2? (34.Bd5 cd5 35.Qa1 Ra6–/+) 34...Qc2 (better 34...Bf3 35.Qa4 Bd1 36.Qd1 c5–+) 35.Nc2 Kf7 36.Rd4 Nb6 (36...Nc5!?–+) 37.Rd3–/+ Na4 (37...c5–/+) 38.Rd4–+ Nb2 39.Nb4 (39.Bd5 cd5 40.Kf1 Ke6–/+) 39...Ke6 40.Bd5 cd5 41.Rd1?? (41.g4 fg4 42.hg4 Rb6 43.Nd5 c2 44.Nf4 Kf6 45.g5 Kg5 46.Rd5 Kh6–+) 41...Ke5 (better 41...Nd1 42.Nc2 Rb6–+) 42.Rc1 (42.Rd4 Rb6 43.Nc2 Nc4–+) 42...d4 43.ed4 Kd4 44.Rc2 (44.Na2 Rc6–+) 44...Kc4 45.Na2 Rd1 46.Kh2 Rd3 (better 46...Na4 47.Re2 Kb3 48.Nc3 Nc3–+) 47.Nc1?? (47.Nc3 Kb3 48.Rb2 Kb2 49.Ne2–+) 47...Rd2 48.Ne2 (48.Rc3 Kc3 49.Kg3 Nd1–+) 48...Rc2 49.Nf4 Rf2 50.Ng6 Rg2! 51.Kg2 c2 52.Kg3 c1Q 53.Ne5 Kd5 54.Nf3 Qe3 55.Kg2 Qf3 (55...Nd3 56.h4 Qf2 57.Kh1 Qg3 58.Ne5 Nf2) 56.Kf3–+ Ke5 57.Kg3 f4 58.Kf2 Kf5 (better 58...Ke4 59.Ke2–+) 59.h4 Ke4 60.Kg2 (60.Ke2 f3 61.Kd2 Nc4 62.Kc3 Ne3 63.Kb2 f2 64.Kc3 f1Q 65.Kb3 Qc4 66.Kb2 Qb4 67.Kc1 Qc3 68.Kb1 Qb3 69.Kc1 Qc2) 60...f3 (60...Ke3 61.Kh3 f3 62.Kh2 f2 63.Kg2 Ke2 64.Kh3 f1Q 65.Kg3 Nd3 66.Kh2 Nf4 67.Kg3 Qf2) 61.Kf2 Kf4 (61...Nd3 62.Kf1 Ke3 63.Kg1 Ke2 64.Kh1 f2 65.Kg2 f1Q 66.Kh2 Nf4 67.Kg3 Qf2) 62.Kf1 Kg4 (62...Ke3 63.Kg1 f2 64.Kf1 Nc4 65.Kg2 Ke2 66.Kg3 f1Q 67.Kh2 Ne3 68.Kg3 Qf3 69.Kh2 Qg2) 63.Kg1 Kh4 64.Kf1 Kg4 (64...Nd3 65.Kg1 Kg3 66.Kh1 h4 67.Kg1 h3 68.Kf1 Kf4 69.Kg1 f2 70.Kf1 h2 71.Kg2 h1Q 72.Kh1 f1Q 73.Kh2 Qf3 74.Kg1 Qg3 75.Kf1 Qf2) 65.Kg1 Kf4 66.Kf1 (66.Kh1 Ke3 67.Kg1 f2 68.Kf1 Nc4 69.Kg2 Ke2 70.Kh3 f1Q 71.Kh4 Qf5 72.Kg3 Qf3 73.Kh2 Ne3 74.Kg1 Qg2) 66...Ke3 67.Kg1 Nd3 Black prepares the advance f2 68.Kh2 (68.Kh1 f2 69.Kg2 Ke2 70.Kh3 f1Q 71.Kh4 Qf5 72.Kg3 Qf2 73.Kh3 Nf4) 68...Nf4 (68...f2 69.Kh3 f1Q 70.Kh4 Qf5 71.Kg3 Qf2 72.Kh3 Nf4) 69.Kg3 Ke2 (69...f2 70.Kh4 f1Q 71.Kg5 Qa6 72.Kh4 Qf6 73.Kg3 Qg6 74.Kh4 Qg4) 70.Kh4 f2 71.Kg5 f1Q 72.Kh6 (72.Kf6 Qa1 73.Kf7 Qa7 74.Kf6 Qa6 75.Kg7 Qg6 76.Kf8 Qh7 77.Ke8 Nd5 78.Kf8 h4 79.Ke8 Qe7) 72...Qg2 73.Kh7 Qg5 74.Kh8 Qg6 (74...Ne6 75.Kh7 Qg7) ½–½. BeepBeepImAJeep (2615) – OjaiJoao (2345), lichess.org, 2016.

4.a4 Ngf6 5.e3 (5.d4 e5+=) 5...g6 (5...e5 6.d4+=) 6.Nf3 (6.d4 Bg7=) 6...Bg7 (6...e5 7.Nc3=) 7.Qc2 (7.d4 a5 8.b5 cb5 9.ab5 Qc7=) 7...0–0 (7...a5 8.b5=) 8.h3 (8.d4 a5=) 8...Nb6 (8...a5 9.b5+=) 9.a5= Nbd7 10.d4 Re8 (10...b6 11.g4=) 11.Nc3 (11.Be2 e5=) 11...e5 12.d5 (12.de5 Ne5 13.Ne5 de5=) 12...Qc7 (12...c5 13.Nb5 e4 14.Nd2=) 13.Qb3 White prepares b5 (13.e4 c5 14.b5 Nh5+=) 13...Rb8 (13...a6 14.Be2=) 14.Be2 a6 (14...e4 15.Nd4=) 15.0–0+= b6 16.dc6 Qc6 17.b5 (17.Rfb1 Qc7 18.ab6 Qb6+=) 17...Nc5 18.Qa2 Qa8 (18...Qd7 19.ab6 Rb6 20.Rfc1=) 19.ab6 (19.Rfd1 e4 20.Ne1 Rd8+=) 19...Rb6= 20.Rfd1 Qb8 21.Ba3 ab5 22.Bc5 dc5 23.cb5 (worse is 23.Nb5 e4 24.Nd2 Ra6+=) 23...Be6 24.Bc4 (24.Qa3 e4 25.Ng5 Qe5 26.Ne6 Rbe6+=) 24...Bc4 25.Qc4 Rc8 26.Ra5 h6 27.Na4 Rd6 28.Rd6+/– Qd6 1–0. De Visser,Arno – Bergman,E, 1996.

4.b5 Ngf6 5.a4 e5 6.e3 e4 7.Nc3 d5 8.cd5 cd5 9.Qb3 Nc5 10.Qa2 (10.Qc2!?=+) 10...Be6–/+ 11.Qb1 Bd6 12.Nge2?? (better 12.Qd1–/+) 12...Nd3–+ 13.Kd1 (13.Qd3 ed3 14.Nd4 0–0–+) 13...Nf2 14.Kc2 (14.Ke1 Nh1 15.g3 Ng4–+) 14...Nh1 15.g3 Rc8 (15...Nf2 16.Nf4–+) 16.Nd4 (16.Qe1 Ng4 17.h3 Nh6–+) 16...Nf2 17.Ba3 (17.Qe1 N2g4 18.h3 Nh2–+) 17...0–0 (17...Ba3 18.Ra3 N6g4 19.Qe1–+) 18.Be2 (18.Bd6 Qd6 19.Qe1 N2g4–+) 18...h6 (18...Ba3!? 19.Ra3 Bg4 20.Qf1 Be2 21.Qe2–+) 19.Qf1 Nd3 (better 19...Ba3 20.Ra3 Qd6 21.Rb3–+) 20.Nf5 (20.Bd3 ed3 21.Qd3 Ba3 22.Ra3 Qe7–+) 20...Bf5 21.Qf5 Ba3 22.Ra3 Qd7 (22...d4 23.ed4 Qd4 24.Qf1 Nb4 25.Kb1 Qd2 26.Qc1–+) 23.Qf1 (23.Qd7 Nd7 24.Bd3 ed3 25.Kd3 Ne5 26.Ke2–+) 23...Rfd8 Black plans d4 (better 23...Nb4 24.Kb1 d4 25.ed4 Qd4 26.Rb3–+) 24.Ra1 (24.Bd3 d4 25.ed4 Qd4–+) 24...d4 25.ed4 Qd4 26.Rd1 (26.Ra3 Nb4 27.Kb1 Qd2–+) 26...Nb4 (26...Qa4! 27.Kb1 Qb3 28.Ka1 Qb2) 27.Kb1 Nd3 (27...Nfd5 28.Qg1 e3–+) 28.Qf5?? (28.Kc2 Qa4 29.Kb1 Qb3 30.Ka1 Qb2) 28…Qb4 (28...Qb4 29.Ka1 Qb2) 0–1. BeepBeepImAJeep (2640) – skopje123 (2600), lichess.org, 2015.

4.d4 e5=.

4.e3 e5 5.Nf3 Be7 6.Qc2 Qc7 (6...Ngf6 7.Be2=) 7.d4 Ngf6 8.Nbd2 0–0 9.Bd3 h6 (9...ed4 10.Nd4 Ne5 11.0–0=) 10.h3 (10.0–0 ed4 11.Bd4 Ne5+=) 10...a5 11.a3 Re8 (11...ab4 12.ab4 Ra1 13.Ba1=) 12.0–0 Bf8 (12...ed4 13.Bd4 Ne5 14.Bf5=) 13.Ne4 (13.de5 de5 14.c5 ab4 15.ab4 Ra1 16.Ra1 b6 17.cb6 Qb6+=) 13...Ne4 14.Be4 Nf6 15.de5 de5 16.c5 Bd7 (16...Ne4 17.Qe4 f6 18.Rfd1=) 17.g4 (17.Rfd1 Ne4 18.Qe4 f6=) 17...ab4 (17...Ne4 18.Qe4 f6 19.Rfd1=+) 18.ab4= Ra1 19.Ra1 b6 (better is 19...Ne4!? 20.Qe4 f6=) 20.cb6+/– Qb6 21.Ne5 Qb4 22.Bf3 c5 23.Rb1 Qa5 24.Nd7 Nd7 25.Qf5 Qa4 26.Bd5+/– Re7 27.Bc3 Qa3 28.Rb3 Qa4 29.Rb7+/– Nf6 30.Bf6 Rb7 31.Bb7 gf6 32.Qf6 Qe8 33.Bd5 Bg7 34.Qf5 Qf8 35.Kf1 Qe8 36.Ke1 Kf8 37.Ke2 Kg8 38.h4 Qe7 39.g5 hg5 40.hg5 Kf8 41.Qc8 Qe8 42.Qc5 Qe7 43.Qc8 Qe8 44.Qf5 Ke7 45.f4 Ba1 46.e4 Qf8 47.e5 Ke8 48.Qc8 Ke7 49.Qb7 (49...Kd8 50.Bc6 Qd6 51.ed6 Bd4 52.Qd7; 49.Qc7 Ke8 50.Bc6) 1–0. Blasig,Volker – Ragni,Julien, Luxembourg–chT, 1993.

4.e3 e5 5.Nf3 Be7 6.d4 Qc7 7.de5 (better 7.Nc3!?+–) 7...de5 8.a3 g5 (8...Ngf6 9.Nbd2=) 9.Be2 h5 (9...g4 10.Nfd2+=) 10.0–0+– Rh6 (10...g4 11.Nfd2+–) 11.c5 g4 12.Nfd2 Nf8 (better 12...h4!?+–) 13.Nc4+– b6? (better 13...Nd7+–) 14.Be5 (14.Ne5?! Nd7 15.f4 gf3 16.Nf3 Ngf6+–) 14...Qb7 15.Nd6 (15.Nc3!? Be6 16.Bf4 Rf6+–) 15...Bd6 16.cd6 Ne6 (16...Re6 17.Bf4+–) 17.f3 (17.Qa4 Nf6+–) 17...f6 18.Bb2 g3 (18...Bd7 19.Nc3 0–0–0 20.Qa4+–) 19.hg3 Rg6 (19...Bd7 20.Qa4+–) 20.Nd2 Rg3 21.Ne4 Rg6 22.Rc1 Qd7 (22...f5 23.f4 Kf8 24.Bh5+–) 23.f4 f5 (23...Ng7 24.f5 Rh6 25.Qb3+–) 24.Bh5 Qh7 25.b5 fe4 (25...Kf8 26.Bg6 Qg6 27.bc6 Qf7+–) 26.f5 Nc5 27.Bg6 Qg6 28.fg6 cb5 29.Qd5 (29.Qd5 Kd7 30.Rf7 Kd8 31.Rc5 Nf6 32.Qa8 bc5 33.Bf6 Ke8 34.Qc8) 1–0. DEFFM – GuestNXCC, freechess.org, 2019.

4.Nf3 e5 5.e3 Ngf6 6.Be2 e4 7.Nd4 d5 (7...c5 8.Nf5=) 8.cd5 cd5 (8...Nd5 9.a3=) 9.Qb3 Bd6 10.Nf5 Bf8 11.0–0 Nb6 12.Bb5 Bd7 13.Bf6 Qf6 14.Bd7 Nd7 15.Nd4 Qe5 16.f4 ef3 (16...Qd6 17.Nb5 Qc6 18.N1a3+–) 17.Nf3 Qh5 (17...Qd6 18.a3+=) 18.Nc3+– Exerts pressure on the isolated pawn 18...Rd8 (18...Nb6!?+–) 19.Qd5 Qd5 20.Nd5 Bd6 (20...Be7 21.Rac1 Nf6 22.Ne7 Ke7 23.Nd4+–) 21.d4 0–0 (21...Nf8 22.e4+–) 22.e4 Rfe8 23.Rae1 Nf8 24.a3 Ne6 25.g3 a5 26.Rb1 (26.Kf2 ab4 27.ab4 Nc7 28.Nc7 Bc7+–) 26...ab4+– 27.ab4 Rc8 (27...Bf8!?+–) 28.Rfc1+– Bf8 29.Kf2 (29.b5 Rc1 30.Rc1 Rd8+–) 29...b5 (29...Rcd8 30.Nc7 Nc7 31.Rc7 Re4 32.Rb7+–) 30.Ra1 Rc4 (30...Rcd8 31.Re1+–) 31.Rc4 bc4 32.b5 (32.Rc1 Rc8+–) 32...Rb8? (better 32...f5 33.ef5 Nd4 34.Nd4 Bc5+–) 33.b6 Nd4 (33...g5+–) 34.Nd4 Bc5 35.Ke3 Kf8 (35...f5+–) 36.b7 c3 (36...Bd6 37.Ra6 Rb7 38.Rd6 f6+–) 37.Ra8 Bd6 38.Nc3 Ke7 39.Nf5 Kf6 1–0. onur604 (2320) – afr64 (2090), lichess.org, 2020.

4.Nf3 Ngf6 5.Nc3 e5 (5...Ne5 6.Qb3=) 6.e3+= h6 (6...a5 7.a3+=) 7.Be2. GuestKPPY – GuestDBNT, freechess.org, 2020.

4.Nf3 Ngf6 5.e3 e5 6.d3 Be7 7.Be2 0–0 8.Nbd2 (8.0–0 Qc7=) 8...Re8 (8...Qb6 9.Bc3=) 9.0–0= Qc7 10.Qc2 b6 11.Rfc1 Bb7 12.e4 Nf8 (12...Nh5 13.a3=) 13.a4 (13.Rab1 Ne6=) 13...Ng6 14.b5 c5 15.Bc3 Nd7 (15...Nf4 16.Nf1=) 16.Nf1 Nf4 17.Bd1 g6 (17...a6 18.Ne3=) 18.Bd2 Bf6 19.Ne3 Bg7 (19...a6 20.Rcb1+=) 20.Ra3 (20.g3 Ne6+=) 20...Rf8 21.a5 Rae8 22.ab6 ab6 23.Ra7 (23.g3 Ne6+=) 23...Ra8+= 24.Rca1 Ra7 25.Ra7 Ra8 26.Ra8 Ba8 27.g3 Ne6 28.Qa4 Qb8 29.Qa2 Bb7 30.Be2 Qa8 31.Qa8 Ba8 32.h4 Bb7 33.Kh2 ½–½. Fournier,Frederic (1860) – Macquet,Stephane (2010), FRA Ch (Team) N5 Senlis–Mers, 2005.

3.c4 e5

4.a3 f5 5.e3 Be7 6.Nf3 Bf6 7.d4 e4 8.Nfd2 Ne7 9.f3 (9.Be2 0–0=) 9...Bg5 10.f4 Bf6 11.Be2 0–0 12.0–0 Be6 13.Nc3 Bf7 (13...Nd7 14.Qc2=) 14.Qc2 (14.Qe1 c5 15.Nb3 cd4 16.Nd4 Nbc6=) 14...Nd7 15.Rad1 d5 16.cd5 cd5 17.Rc1 Rc8 18.Qb3 a6 19.Na4 b5 20.Rc8 Qc8 21.Rc1? ba4–/+ 22.Rc8 ab3 23.Rf8 Nf8 24.Ba6 Bh5 25.Nb3 Nd7 26.Nc5 Nb6 27.Bb7 Nc4 28.Bc1 Bf7 29.a4= Be8 30.a5 Nc6 31.a6 Na7 32.Bd5+/– Bf7 33.Bb7 Be7 34.Kf2 Kf8 35.h3 Ke8 36.g4 g6 37.g5 Kd8= 38.d5 Kc7+= 39.Ke2 Kb6 40.Ne6 Bb4 0–1. Fournier,Frederic – alboes (1625), Active, 2007.

4.d4 Nd7 5.de5 Ne5 6.e3 Bg4 7.Qa4 Be7 8.Nc3 Bf6 9.Ne4 Bh5 10.b5 Bg6 11.Nf6 Nf6 12.Rd1 Qc7 13.Be2 (13.bc6 Nc6 14.Ne2 Bh5+/–) 13...Nfd7 (13...0–0 14.Nf3=) 14.Nf3 (14.f4!? Nc5 15.Qa3+=) 14...Nc5= 15.Qa3 Nf3 16.Bf3 0–0 17.0–0 Rab8 18.Bd4 (18.Qa7?? Ra8 19.b6 Qe7–+) 18...cb5 19.cb5 Rfe8 20.Bd5 (20.Qa7 Ra8 21.b6 Qc8 22.Bb7 Nb7–+) 20...Be4 21.Be4 (21.Qa7? Ra8 22.Bc5 Ra7 (22...dc5?! 23.Qa8 Ra8 24.Be4+=) 23.Ba7 Bd5 24.Rd5 b6 25.Bb6 Qb6–+) 21...Re4 22.Qa7 Rbe8 23.Rc1 Rh4 24.g3 (worse is 24.Bc5 dc5 25.f4 Rh5+/–) 24...Rh6 (24...Rh5 25.Rfd1+/–) 25.Bc5+– dc5 26.Qc5 Qd7 27.h4 Rh4?? (better is 27...Rd6+–) 28.Rfd1 (28.gh4?! Qg4 29.Kh2 Qh4 30.Kg2 Qg4 31.Kh1 Qh4 32.Kg1 Qg4 33.Kh1 Qh4 34.Kg2 Qg4 35.Kh1=) 28...Qh3 29.gh4 Qg4 30.Kf1 (30.Kf1 Qh3 31.Ke1 Qh1 32.Ke2 Qh4 33.Rc4+–) 1–0. Fournier,Frederic (2080) – Mat_elot (1720), Chess.com (Team Breiz), 2012.

4.e3 (--> 1.b4 e5 2.Bb2 d6 3.e3 c6 4.c4).

4.e4 Nf6 5.Nc3 =+.

4.e4 Nh6 5.c5 dc5–/+ 6.b5 Qf6 7.Nf3 Qf4 8.Be5 Qe4 9.Be2 f6 10.Bc7 Nd7 11.Nc3 Qe7 12.bc6+= Ne5 13.Nd5 Nd3 14.Kf1+= Nb4?? 15.Ne7+– Be7 (16.cb7 Bb7 17.Qa4 Kf8+–). Ridgereeno – Tricky.1, ChessWorld.net, 2005.

4.Nf3 Bg4 5.e3 Nd7 6.Be2 (6.Nc3 Ngf6=) 6...Ngf6 7.h3 Bf3 8.Bf3 Be7 (8...e4 9.Be2=) 9.a3 (9.Nc3 Nb6 10.d3 0–0=) 9...0–0 (9...d5 10.cd5 cd5 11.Nc3=) 10.0–0 d5 11.cd5 cd5 12.Nc3 Bd6 (better is 12...Nb6!?=) 13.Nd5+/– e4 14.Nf6 Nf6 15.Be2 Bc7 (15...Qe7 16.Qb1+/–) 16.d3 Qd6 17.g3 Rad8 18.de4 Qd1 (18...Qe6 19.Qc2 Be5 20.Be5 Qe5 21.Bd3+/–) 19.Rad1 Rd1 (better is 19...Ne4 20.Rd4 Ng5+–) 20.Rd1 (20.Bd1?! Ne4 21.Bc2 Nd2+–) 20...Ne4 21.Bf3 (21.Rd7!? Bb6+–) 21...Nd6 22.Be5 Rd8 23.Bd6 Bd6 24.Bb7 h6 25.b5 Rb8 (25...Kf8 26.a4+–) 26.Rd6 Rb7 27.a4 Kf8 28.Kg2 Ke7 29.Rc6 Kd7 30.f4 f6 31.Kf3 Ke7 (31...Kd8 32.e4+–) 32.Ke4 1–0. Fournier,Frederic (1975) – xyxy (1865), Active (5/0), 2004.

3.c4 e6

4.a3 f6 5.e3 g6 6.Nf3 b6 7.d4 h6 (7...a5 8.ba5 Ra5 9.Bd3+=) 8.Bd3+/– a6? (better is 8...Ne7!?+/–) 9.Bg6+– Kd7 10.Bd3 Ne7 11.g3 (11.d5 e5+–) 11...Bg7 12.Nbd2 Rg8 (12...Ke8 13.Nh4+–) 13.0–0 (13.c5 Bb7+–) 13...f5 (13...Ke8 14.Qc2+–) 14.c5 bc5 15.dc5?? (15.bc5 dc5 16.Ne5 Kc7+–) 15...d5?? (better is 15...Bb2 16.Ra2 Bf6–/+) 16.Bg7 Rg7 17.Ne5 Kc7 18.Ndf3 Nd7 19.Nd7 Bd7 20.Ne5 Ng6 21.Nd7 Qd7 22.Qh5 Ne5 23.Be2 Rh7 24.f4 Nf7 25.Qg6 Nh8 26.Qf6 Rg8? 27.Ba6 h5 28.Qe5 Kd8 29.Qb8 Ke7 30.Qg8 Kf6 31.Qg5 Kf7 32.a4 Ng6 33.b5 h4 34.bc6 Qc6 35.Bb5 Qc7 36.c6 hg3 37.hg3 Qb6 38.Rae1 d4 39.ed4 Qd4 40.Rf2 Rh2 41.Ref1 Qe3 42.Kh2 Nf4 43.gf4 Qe4 44.c7 Qc2 45.Rc2 e5 46.c8Q ef4 47.Qf4 Kg6 48.Qff5 Kh6 49.Qh8 1–0. Fournier,Frederic (1725) – Jus2 (1740), Active, 2007.

4.a3 Nf6 5.e3=.

4.a4 b6 5.e3 a6 (5...Nf6 6.Nf3=) 6.d4 (6.Nf3 Nf6=) 6...d5 7.b5 (7.c5 Nd7=) 7...e5 (7...Nf6!?=) 8.de5+= Bb4 (8...Be6 9.cd5 Qd5 10.Qd5 Bd5 11.Nf3+=) 9.Nc3 (9.Bc3 Bc3 10.Nc3+–) 9...d4? (better 9...Ne7!?+=) 10.ed4 Bf8 (10...Ne7+–) 11.Nf3 cb5 (11...Bg4 12.Be2+–) 12.ab5 ab5 (12...Ra7+–) 13.Ra8 bc4 (13...Bb7 14.Ra7 Qd7 15.d5+–) 14.Rb8 b5 15.Bc4! bc4 16.Qa4 Qd7 17.Rc8 Ke7 18.Ba3 (18.Ng5 Qa4 19.Na4 f6 20.Ba3 Kd7 21.Nb6) 18...Ke6 19.Qc4 Qd5 (19...Kf5 20.Qd3 Kg4 21.Qe4 Kh5 22.Qh4 Kg6 23.Qg5) 20.Qd5 Kf5 21.Qe4 Ke6 22.Ng5 Kd7 23.Qb7 (23.Qc6) 1–0. GuestSMDZ – GuestXCHK, freechess.org, 2019.

4.a4 Nf6 5.e3=+.

4.b5 c5 5.e3 Nf6 6.Nf3 Be7 7.Be2 Nbd7 (7...a6 8.d4=) 8.0–0 b6 (8...0–0 9.Nc3=) 9.d4 (9.Nc3 0–0=) 9...cd4 (9...0–0 10.Nc3=) 10.Nd4+= Bb7 11.Nc6 (11.Nd2!?+=) 11...Bc6= 12.bc6 Nc5 (12...Ne5 13.Be5 de5 14.Nc3=) 13.Nc3 Rc8 (13...a6 14.Na4=) 14.Bf3 0–0 15.Rb1 a6 (15...Ne8 16.Nb5 a6 17.Nc3=) 16.Na4+= Na4 (16...Nfe4!?+=) 17.Qa4+– a5 (17...e5!?+–) 18.Bd4+– d5 (18...Rb8 19.Qb5 Qc8 20.Bb6+–) 19.Bb6 Qb6?? (better 19...Qd6 20.cd5 Nd5 21.Bd5 Qd5+–) 20.Rb6 Bb4 (20...dc4 21.Qc4 Bb4 22.Rd1+–) 21.cd5 Nd5 (21...ed5 22.Rd1+–) 22.Bd5 ed5 23.Rb7 d4 (23...Rfe8 24.Qb5 d4 25.Qf5+–) 24.ed4 h5 (24...Bd6 25.d5+–) 25.d5 g6 26.c7 Bd6 27.Qc6 Be5 28.d6 Rc7 1–0. GuestYMLD – GuestSQWB, freechess.org, 2020.

4.e3 Nd7 5.Nf3 h6 (5...e5 6.Be2=) 6.Be2 (6.d4 d5 7.c5 b6+=) 6...Ngf6 7.d4 (7.0–0 Be7+=) 7...g5 (7...e5 8.Nc3+=) 8.0–0 Bg7 9.Nbd2 Nf8 (9...Rg8 10.e4+=) 10.a4 (10.c5 g4 11.Ne1 d5+–) 10...Ng6 11.c5 d5 12.Ne5 (12.Bd3 Nd7+–) 12...Ne7 (12...Ne5!? 13.de5 Nd7+=) 13.b5 (13.a5 Nd7+–) 13...cb5 (13...Nd7 14.Nd7 Bd7 15.Bd3+–) 14.Bb5 (14.ab5 Nd7+–) 14...Kf8 (14...Bd7 15.Bd3+–) 15.f4 (15.Qf3 a6 16.Bd3 Ke8+–) 15...gf4 (15...Nf5 16.Qe1+–) 16.Rf4 a6 17.Bd3 Nc6 (17...Ke8 18.Qf3 Qa5 19.Nf1+– (19.Rf6?! Qd2 20.Qf2 Qf2 21.Rf2 f5+=)) 18.Ndf3 (18.Qf3 Ke8 19.Rf1 Qa5+–) 18...Rg8 19.Nc6 bc6 20.Ne5 a5 (20...Ke8 21.Qf3+–) 21.Qf1 Ra7?? (21...Bb7+–) 22.Nc6 Qc7 23.Na7 Qa7 24.c6 (24.Rf6 Bf6 25.Qf6 Qc7+–) 24...Qc7 (24...Nh5 25.Rf2 f5+–) 25.Ba3 Ke8 26.Rf6 Bf6 (26...h5+–) 27.Qf6 h5 28.Bh7 (28.Bg6 fg6 29.Rf1 Qh2 30.Kh2 e5 31.Qe7) 28...Rf8 29.Bf8 (better 29.Rc1!? Qd8 30.Qh6 Qe7 31.Be7 Ke7+–) 29...Kf8 30.Qh8 (better 30.Bg6 Kg8 31.Rf1 fg6 32.Qg6 Qg7 33.Qh5 Qe7+–) 30...Ke7 31.Rf1 Ba6 32.Qf6 Kd6 33.Qe5 (better 33.Rc1!? Bc4 34.e4 Qc8+–) 33...Ke7 (33...Kc6 34.Qc7 Kc7 35.Rf7 Kc6+–) 34.Qc7 (34.Qc7 Ke8 35.Qf7 Kd8 36.Qd7) 1–0. GuestYWTD – GuestZTHZ, freechess.org, 2016.

4.Nf3 Nf6 5.e3 Be7 6.Be2 0–0 7.d3 Na6 8.a3 Nc7 9.Nbd2 d5 10.0–0 dc4 11.dc4 b6 (11...a5 12.Qb3+=) 12.Qc2 Bb7 13.Rfd1 Qc8 14.Bd3 Rd8 15.Ng5 g6 16.Nge4 Ne4 17.Ne4 Rd7?? (better 17...Ne8+–) 18.Qc3+– f6 19.Nf6 Bf6 20.Qf6 (20.Qf6 e5 21.Be5+–) 1–0. GuestFWLS – jeanlucc, freechess.org, 2017.

3.c4 Bf5

4.a3 Nd7 5.Nc3 e5 6.e4 Bg6 7.Nf3 Bh5 (7...Ngf6 8.d4=) 8.d3 Be7 9.Be2 Bf6 10.0–0 Ne7 11.Rc1 h6 12.Nd2 Be2 13.Qe2 g5 (13...Bg5 14.Rc2=) 14.Nf3 Ng6 15.Rcd1 Nf4 16.Qe3 (16.Qc2 Ne6+=) 16...g4 17.Nd2 (better is 17.Ne1!?=) 17...Bg5–/+ 18.Qe1?? (better is 18.Qg3 Nf6 19.h4 gh3 20.gh3–+) 18...Nd3–+ 19.Qe2 Nb2 20.Qg4 Nd3 (better is 20...Nd1 21.Rd1 Bd2 22.Rd2 Qg5 23.Qg5 hg5 24.Rd6 Nb6–+) 21.Nf3 Nf4 (21...Nf6 22.Qh3 Nf4 23.Qf5–+) 22.g3 Ng6 23.Rd6–/+ Qe7 24.Rfd1 Rd8 25.c5 Ngf8–/+ 26.h4 Bf6 27.Qf5 Ne6–+ 28.Ne5?? Ne5 29.f4 Ng6 30.e5 Bg7 31.Qd3?! Rd6 32.cd6 Qd7 33.Ne4 0–0 34.f5 Nh4! 35.fe6 Qe6 36.gh4 Be5 37.d7 Bc7 38.Kf2 f5 39.Rg1 Kh7+= 40.Ng3? Qa2 41.Ne2 1–0. Fournier,Frederic (1780) – alboes, Active, 2006.

4.Nc3 Nf6 =+.

4.e3 e6 5.Nf3=.

4.e3 Nf6 5.Nf3 Nbd7 6.Be2 e5 7.0–0 Be7 8.d3 h6 (8...a5 9.b5=) 9.Qc2 Qb6 10.e4 Bh7 (10...Bg4 11.Bc3=) 11.Nbd2 (11.a3 0–0=) 11...0–0 (11...Qb4!? 12.Rfb1 Qa5=+) 12.a3+= Rac8 13.c5 (13.Rfb1 Rfe8=) 13...dc5 (13...Qc7 14.d4+=) 14.Nc4 Qd8 15.Nfe5 cb4 16.Nd7 Nd7 17.ab4 Bb4 (17...a6 18.Qb3+=) 18.Bg7!+– Re8 (18...Kg7 19.Qb2 Double attack (19.Qb2 Decoy)) 19.Bh6 (19.Qb2 Be7+–) 19...Nf6? (19...b5 20.Qb2 Bf8 21.Bf8 Nf8 22.Ne5+–) 20.Qc1 (20.Qb2 Bc5 21.Be3 Be3 22.fe3 b5 23.Rf6 bc4 24.Ra7 Rb8+–) 20...Bg6 (better 20...b5!? 21.Na5! c5+–) 21.Qb2 Be7 (21...Bc5 22.Be3 b5 23.Bc5 bc4 24.Rfd1+– (24.Ra7?! cd3 25.Bd3 Qd3 26.Qf6 Re6+–)) 22.Ne5 (22.Qb7 Rc7 23.Qb2 Bc5+–) 22...Kh7 (22...Bc5 23.Ng6 fg6 24.Qb3 Kh8 25.Be3+–) 23.Be3 Nd7 24.Ng6 fg6 25.f4 Rf8 26.Rf3 Bf6 (26...Nf6 27.Ra7 Rc7 28.Rb7+–) 27.e5 Bg7 (27...Be7 28.Ra7 (28.Ba7?! b6+–) 28...Rb8 29.Rb7+–) 28.Rh3 Kg8 29.Qa2 Rf7 30.e6 Nb6 (30...Ne5 31.ef7 Nf7+–) 31.ef7 Kf8 1–0. GuestKFHB – GuestBXST, freechess.org, 2017.

4.e3 Bg6 5.Nf3 e5 6.Be2 (6.d4 e4 7.Nfd2 Nf6=) 6...Nd7 (6...Qb6 7.a3=) 7.0–0+= f5 (7...Qb6 8.Bc3=) 8.d4 e4 9.Nfd2 Be7 (9...Ngf6 10.a4+=) 10.c5 (10.d5 Ngf6+=) 10...d5 (10...Ngf6 11.Nc3=) 11.a4 (11.Nc3 Ngf6+=) 11...Ngf6 12.b5 0–0 13.a5 a6 (13...cb5 14.Bb5 Bh5 15.Qb3+=) 14.bc6 (14.b6 f4=) 14...bc6 15.Nc3 f4 (15...Qc7 16.Nb3=) 16.Na4 (16.ef4 Qc7=) 16...f3 (16...Ra7 17.Nb6=) 17.gf3+= ef3 (17...Bh5 18.Nb6 ef3 19.Bd3 (19.Na8?? fe2 20.Qc2 ef1R 21.Rf1 Qa8–+; 19.Bf3?! Bf3 20.Qf3 Ne4+=; 19.Nf3?! Ra7+/–) 19...Nb6 20.ab6=+ (< 20.cb6 Qd7 21.Kh1 Qh3–/+)) 18.Bf3 (18.Nf3 Ra7+=) 18...Ne4 (better is 18...Bd3 19.Be2 Be2 20.Qe2 Qe8+=) 19.Nb6?? (19.Be4 de4 (< 19...Be4 20.Ne4 de4 21.Qg4+/–) 20.Qb3 Kh8+=) 19...Nb6?? (19...Nd2 20.Bd5 cd5 21.Qd2 Bc5 22.Na8 Qg5 23.Kh1 Be4 24.f3 Rf3 25.Rf3 Bf3 26.Qg2 Qg2) 20.Be4+= de4 21.ab6+/– Qd5 22.Kh1 Bh5 23.Qe1 Bh4 24.Rg1?? Bf2–+ 25.Qf1 Bg1 26.Qg1 Bf3 27.Nf3 ef3 28.Qf2 Rf6 29.Rg1 Raf8 30.e4 Qe4–+ 31.d5 Rg6 32.dc6 Qc6 33.Rg3 Rg3 34.hg3 Re8 35.Qd4 f2 36.Kh2 f1Q 37.Qg7 1–0. toll (1650) – Lempira (1805), ICC, 2003.

3.c4 Nf6

4.a4 Qc7 5.b5 (5.e3 e5=) 5...Bg4 6.e3?? (better 6.f3 Bd7 7.e4=) 6...Bd1–+ 7.Kd1 e5 8.Nf3 Be7 9.Ke1 Nbd7 10.Nc3 h6 11.Be2 a6 12.bc6 bc6 13.d4 Rb8 14.Bc1 0–0 15.Bd2 e4 16.Ng1 d5 (16...c5!? 17.Nh3–+) 17.c5 Nc5 (17...a5!? 18.f3–+) 18.dc5 Bc5 19.a5 (19.Ba6 Rb2 20.Bf1 Bb4–+) 19...Bb4 20.Bf1 (20.Ba6 Ra8 21.Bf1 Ra5–+) 20...Ba5 21.Nge2 (21.Be2 Rb3 22.Ne4 de4 23.Ra5 Rb1 24.Bd1 Rd8–+) 21...c5 22.Nf4 (22.Ng3 Rb3 23.Nd1 Bd2 24.Kd2 Qb6 25.Ba6 Ra8–+) 22...d4 23.Ncd5 (23.Ne4 Rb1! 24.Rb1 Ne4 25.Ba6 Bd2 26.Ke2–+) 23...Bd2 24.Kd2 Qe5 25.Nf6 Qf6 26.Ba6 Rb2 (26...de3 27.fe3 Rfd8 28.Ke2 Qb2 29.Ke1 Qa1 30.Kf2 Rd2 31.Be2 Qh1 32.Kg3 g5 33.Kg4 gf4 34.Bd1 Qg2 35.Kh4 Qh2 36.Kg4 Rd5 37.ef4 f5) 27.Ke1 d3 28.Rd1 g5 (28...Qc3 29.Kf1 Qd2 30.Nd3 ed3 31.Rd2 Rb1 32.Rd1 Rd1) 29.Nh3 Qc3 30.Kf1 Qc2 31.Re1 g4 (31...Rb1 32.g3 Qe2 33.Kg2 Qf3 34.Kf1 Re1 35.Ke1 Qe2) 32.Bd3 (32.g3 gh3 33.Re2 Qe2 34.Kg1 Qf2) 32…ed3 (32...ed3 33.Kg1 Rb1 34.g3 gh3 35.Kf1 Re1 36.Ke1 Qe2; 32...Qd3 33.Kg1 Rb1 34.g3 gh3 35.f3 Re1 36.Kf2 Qe3) 0–1. BeepBeepImAJeep (2555) – Zipperface (2245), lichess.org, 2018.

4.a4 e5 5.e3 Nbd7 6.b5 Be7 7.Nc3 0–0 8.Nf3 Re8 9.Be2 e4 10.Nd4 Qc7 (10...c5 11.Nf5=) 11.bc6 bc6 12.0–0 Nc5 13.Ba3 Bf8 14.Bc5 (14.f3 Rb8=) 14...dc5=+ 15.Nc2 (15.Nb3 Bd6 16.h3 Qe7=+) 15...Bf5 16.Rb1 Rad8 (16...Bd6 17.h3=+) 17.Qc1 (17.g4 Bg6=+) 17...Qd7 Exerts pressure on the backward pawn 18.Rd1 h5 (18...Bd6 19.Ne1=+) 19.Bf1 (19.Ne1 Qe6=) 19...Ng4 20.h3 Ne5 21.Ne2 (21.Na3 Bd6=+) 21...Bd6 (21...Nd3 22.Qa3=+) 22.Ng3 (22.Nf4 Qe7=) 22...Bg6=+ 23.Ne1 Bc7 (23...h4 24.Ne2–/+) 24.Qc3 (24.Be2!?=+) 24...h4–/+ 25.Ne2 Bh7 (better 25...Bh5–/+) 26.f4?? (better 26.Nf4=) 26...ef3–+ 27.Nf3 Bb1 28.Ne5?? (28.Rb1 Nf3 29.gf3 Qd2 30.Qd2 Rd2 31.Rb7–+) 28...Be5 29.Qa3 (29.Qc1 Bd3–+) 29...Bd3 (better 29...Bc2!? 30.Rc1 Qd2 31.Rc2 Qc2 32.Qc1–+) 30.Qc5 (30.Qc1 Qb7 31.Nc3 Bf1 32.Rf1 Bc3 33.dc3 Qb3–+) 30...Qf5 (30...Bc2 31.Rc1 Qd2 32.Rc2 Qc2 33.Qc6–+) 31.Nf4 (31.Qc6 Rc8 32.Qf3 Qd7–+) 31...Bf4 (31...Bc2 32.Rc1 Bb2 33.Qf5 Bf5 34.Re1 Rd2 35.Re2 Re2 36.Be2–+) 32.Qf5 Bf5 33.ef4 Bd3 (33...Bc2 34.Ra1–+) 34.Bd3 Rd3 35.Rb1 (35.a5 Re4 36.f5 Rc4–+) 35...Rd2 36.Rb7 (36.f5 Ree2 37.Kh1 Rg2–+) 36...Ree2 (36...Re1 37.Kh2 Rdd1 38.Rb8 Kh7 39.Rh8 Kh8 40.g4 Re2) 37.Ra7 (37.Rb8 Kh7 38.Rb1 Rg2 39.Kh1–+) 37...Rg2 (37...Re1 38.Kh2 Rdd1 39.Ra8 Kh7 40.Rh8 Kh8 41.a5 Rh1) 38.Kf1 (38.Kh1 Rge2 39.Ra8 Kh7 40.Rh8 Kh8 41.a5 Re1) 38...Rgf2 (38...Rdf2 39.Ke1 Rb2 40.Kf1 Rgf2 41.Kg1 Rfd2 42.Ra8 Kh7 43.Rh8 Kh8 44.a5 Rd1) 39.Ke1 (39.Kg1 Rfe2 40.Kf1 Rh2 41.Kg1 Rdg2 42.Kf1 Rb2 43.Ra8 Kh7 44.Kg1 Rhd2 45.Rh8 Kh8 46.a5 Rd1) 39...Rh2 (39...Rde2 40.Kd1 Ra2 41.Ke1 Rh2 42.Ra8 Kh7 43.Rh8 Kh8 44.a5 Rh1) 40.Ra8 (40.Re7 Ra2 41.Re8 Kh7 42.Re2 Rhe2 43.Kd1 Rg2 44.a5 Rg1) 40...Kh7 41.Re8 (41.Ra5 Rb2 42.Rh5 Kg8 43.Rh8 Kh8 44.a5 Rh1) 41...Ra2 42.Kf1 (42.Re2 Rhe2 43.Kd1 Rg2 44.a5 Rg1) 42…Rh1 0–1. BeepBeepImAJeep (2655) – Elda64 (2505), lichess.org, 2016.

4.a4 g6 5.b5 Bg7 6.e3 Nh5 (6...c5!?=+) 7.Nc3 0–0 8.Be2 Nd7 9.Nf3 Nhf6 10.0–0 cb5 11.d4 (11.ab5!? Qc7 12.d3+=) 11...bc4=+ 12.Bc4 Nb6 13.Be2 Nbd5 14.Qb3 (14.Nd5 Nd5 15.Qb3 Nf6=+) 14...Nc3 15.Bc3 Rb8 16.Bb2 Be6 17.Qd1 Bd5 18.Nd2 Ne4 (18...Qb6 19.Qb1–/+) 19.Ne4=+ Be4 20.Bf3 Bf3 21.Qf3 e6 22.Ba3 Re8 23.Rac1 d5 24.Rc2 Rc8 25.Rfc1 (25.Rc8 Qc8 26.Rc1 Qd7–/+) 25...Rc2 26.Rc2 Qa5 Threatening mate... how? 27.Bc5?? (better 27.Rc1–+) 27…Qe1 0–1. BeepBeepImAJeep (2615) – mag_gs (1945), lichess.org, 2018.

4.d4 Qb6 5.a3 c5 (5...a5 6.c5 Qd8 7.Nf3 ab4 8.ab4 Ra1 9.Ba1=) 6.dc5 (6.Qa4 Bd7 7.dc5 dc5=) 6...dc5 7.b5 a6 8.a4 (8.Qa4 Ra7 9.Nc3 Bd7=) 8...ab5=+ 9.ab5 Ra1 10.Ba1 Qa5 (10...g6!?=+) 11.Bc3= Qc7 (11...Qa2 12.Nd2=) 12.Nf3+= Ne4 (12...g6 13.Nbd2 Nbd7 14.g3=) 13.Be5 (13.e3 Nc3 14.Nc3 Qa5+=) 13...Qa5 14.Nbd2 Nd2 (14...Nd7 15.Qa1 Qa1 16.Ba1 Nd2 17.Nd2+=) 15.Qd2 Qd2 16.Nd2 Nd7 17.Bb2 (17.Bc3 Nb6+=) 17...b6 (17...e5 18.g3+=) 18.e3 (18.e4 e5+=) 18...Bb7 19.f3 e5 20.Kf2 f6 (20...Bd6!?+=) 21.Bd3+– g6 22.Ra1 Kf7 (22...Bd6 23.Ra7 Bc8 24.Be4+–) 23.Ra7 e4?? (better 23...Bc8+–) 24.Ne4 (24.Rb7 ed3 25.Rd7 Ke6+–) 24...Be4 25.Be4 (25.fe4?! Ke6+–; 25.Rd7?! Ke8 26.Be4 Kd7 27.Bf6 Rg8+–) 25...Ke7 (25...Ke6 26.Bd5 Kd6 27.Rd7 Kd7 28.Bf6 Bg7 29.Bg7 Rd8+–) 26.Bc6 Kd6 (26...Kf7 27.Rd7 Be7 28.Bd5 Ke8+–) 27.Rd7 Ke6 28.Rb7 Bd6 29.Bd5 Kf5 30.h4 h5 (30...g5 31.Rg7 Bg3 32.Kg3 gh4 33.Kh4 h5 34.g3 Re8 35.e4 Re4 36.fe4) 31.e4 Kf4 32.Bc1 (32.g3) 32...Ke5+– 33.Bb2 Kf4 34.g3 1–0. GuestCRKV – GuestTTMC, freechess.org, 2020.

4.e3 e6 5.a4 d5 6.b5 Be7 7.Nf3 Kf8 (7...0–0 8.Nc3=) 8.Be2 a6 9.0–0 ab5 10.ab5 White creates threats along the open a–file 10...Ra1 11.Ba1 Bd7 12.Nc3 Qb6 13.Qb3 h6 (13...dc4 14.Bc4 cb5 15.Nb5+–) 14.Bb2 Ne8 (14...dc4 15.Bc4 cb5 16.Nb5+–) 15.d4 White launches an attack 15...Nf6 16.c5 Qd8 17.Ra1 Bc8 18.Ra8 Nbd7 (better 18...Nfd7+–) 19.bc6 bc6 20.Ba6 Qa5 (20...Ba6 21.Rd8 Bd8+–) 21.Rc8 Ne8 (21...Bd8 22.Qb7 Ke8 23.Ra8+–) 22.Bf1 (better 22.Qb7 Ndf6 23.Ne5 g6+–) 22...g6 (22...Qa7+–) 23.Qb7 Ndf6 (23...Kg7 24.Qd7 Nf6 25.Qc7 Qc7 26.Rc7+–) 24.Qc6 (better 24.Ne5 h5 25.Nc6+–) 24...Kg7 25.Ne5 (25.Ne5 Qb4 26.Qb6 Qb6 27.cb6+–) 1–0. BeepBeepImAJeep (2665) – juanfer90 (2010), lichess.org, 2017.

4.e3 g6 5.Nf3 Bg7 6.d4 a5 7.b5 Qc7 (7...cb5 8.cb5 a4 9.Bd3=) 8.Bd3+= 0–0 9.0–0 Bg4 (9...Nbd7 10.Nc3+=) 10.Nbd2 d5 (10...Bh6 11.h3 Be6 12.g4+–) 11.Qa4 (11.Rc1 Nbd7+–) 11...Nbd7+= 12.c5 cb5 (12...e6 13.Rac1+=) 13.Bb5 (13.Qb5 e6+=) 13...Nb8 14.Ne5 Nfd7?? (better 14...Bf5+=) 15.Ng4+– 1–0. GuestLWDF – GuestGJYV, freechess.org, 2020.

4.e3 g6 5.Nf3 Bg7 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d6).

4.e3 h6 5.Nf3 g5 (5...e5 6.Nc3=) 6.Be2 g4 7.Nd4 Bg7 8.0–0 Nbd7 (8...Qb6 9.Nc2=) 9.f4 (9.Nf5!? Bf8 10.Ng3+=) 9...gf3= 10.Bf3 Nf8 (10...Ne5 11.Be2=) 11.Be2 Qb6 12.a3 Rg8 13.Nf5 Bf5 14.Rf5 c5 15.b5 (15.Qa4 N8d7+=) 15...Ng6 16.a4 Qc7 17.Nc3 Nh4 18.Rf2 Bh8 19.g3 d5 (19...0–0–0 20.Rf6 ef6 21.Nd5+–) 20.Rf6 (20.Nd5!? Rg3 21.Kh1 (21.hg3? Qg3 22.Kh1 Ne4–+) 21...Nd5 22.Bh8+=) 20...Bf6+= 21.Nd5 Rg3 (21...Qd6!? 22.Nf6 ef6=) 22.Kf1 (22.Kf1 Qc8 23.Nf6 (23.hg3 Qh3 24.Kf2 Qg2 25.Ke1 Qg3 26.Kf1 Qg2 27.Ke1 Nf3 28.Bf3 Bh4; 23.Bf6?? Qh3 24.Kf2 Rg2 25.Kf1 Rg1 26.Kg1 Qg2) 23...ef6 24.hg3 Qh3 25.Ke1 Qg3 26.Kf1=+) 1–0. GuestBFQC – GuestTSCX, freechess.org, 2017.

4.Nf3 e5 5.d3 (5.a3 e4 6.Nd4 a5=) 5...Qb6 6.a3 Nbd7 (6...a5 7.Nc3=+) 7.e3 (7.Nc3 Be7=) 7...a5=+ 8.Qb3 (8.Nc3 ab4 9.Na4 Qd8 10.ab4 d5=) 8...Nc5–/+ 9.Qc2 (9.bc5 Qb3) 9...ab4 10.ab4 (10.d4 ed4 11.ed4 Na4=+) 10...Ra1–/+ (10...Qb4?? 11.Bc3 Na6 12.Ra6 Qc3 13.Nc3 Ra6 14.Qb2+–) 11.Ba1 Qb4 12.Bc3 Qb3 13.Qb3 Nb3 14.Nbd2 Nd2 15.Nd2 Be7 16.Be2 (16.d4 ed4 17.Bd4 Be6–/+) 16...0–0 17.0–0 Nd7 (17...b5 18.Ra1=+) 18.Rb1 f5 19.Nb3 Bd8 20.Na5 Ba5 (20...Bb6 21.d4=+) 21.Ba5 Rf6 (21...Kf7 22.d4=+) 22.Bc7 Nc5 23.d4 ed4 24.ed4 Na6 (24...Ne6 25.Bb6=+ (25.Bd6? Nd4 26.Be5 Ne2 27.Kf1 Re6–+)) 25.Ba5 Kf7 (25...Re6 26.Bf3=) 26.f3 (26.Bf3 Rh6=) 26...Re6=+ 27.Kf2 Re7 28.Bd3 g6 29.Rb3 (29.Bd2 Nc7=) 29...Ke8 30.c5 (30.Bd2!?=) 30...dc5–/+ 31.Ba6 ba6 ½–½. Janssen,Lieselotte – Scholz,Jutta, Straussberg DDR–ch (Women), 1971.

4.Nf3 Bg4 5.e3 e5 6.Be2 Be7 7.b5 (7.Nc3 0–0+=) 7...Nbd7 (7...cb5 8.cb5 Nbd7 9.h3=) 8.d4 (8.Nc3 cb5 9.cb5 e4=) 8...Qc7 (8...e4 9.Nfd2 Be2 10.Qe2 cb5 11.cb5=+) 9.0–0 h5 (9...0–0 10.Nc3=) 10.h3+= e4 (10...Bf5 11.Ng5+=) 11.Nfd2 (better 11.Ng5 Be2 12.Qe2 cb5 13.cb5=) 11...d5? (better 11...Be2 12.Qe2 cb5=) 12.hg4+– hg4 (12...Ng4 13.Bg4 hg4 14.g3+–) 13.g3 Bd6?! (13...Rh3 14.Kg2 (14.Bg4?? Rg3 15.fg3 Qg3 16.Kh1 Ng4 17.Qg4 Qg4–+) 14...Nh5 15.Qe1 (15.Bg4?! Rg3 16.fg3 Qg3 17.Kh1 Qh4 18.Kg1 Qg3 19.Kh1 Qh4 20.Kg1 Qg3 21.Kh1=) 15...Ng3 16.Bg4 Nf1 17.Bh3 Qh2 18.Kf1 Qh3 19.Ke2 cb5 20.cb5+– (20.cd5?! Qh5 21.f3 Rc8=)) 14.Kg2 0–0–0 (14...cb5 15.c5 Be7 16.Qb3+–) 15.c5 (better 15.Nc3 Kb8 16.bc6 bc6 17.cd5 cd5 18.Nb5+–) 15...Rh3 (15...Bg3 16.fg3 Rh3+–) 16.Bg4 Ng4 17.Qg4 (17.cd6 Rh2 18.Kg1 Rdh8 19.Nf3 Qd6 20.Nbd2 Nf2 21.Ne5 Nd1 22.Rad1 Qh6 23.Ne4 Qe3 24.Rf2 Rh1 25.Kg2 R8h2) 17...Rdh8 18.Qh3 (18.cd6?? Rh2 19.Kg1 Rh1 20.Kg2 R8h2) 18...Rh3 19.cd6 Qd6 20.Kh3 Qh6 (20...cb5 21.Kg2+–) 21.Kg2 Nf6 (21...cb5 22.Nc3 Qe6 23.Rac1+–) 22.Rh1 Qg5 23.bc6 bc6 24.Rh8 Kc7 25.Nc3 Ng4 26.Rf1 Qf6 (26...Qf5 27.Ba3+–) 27.Ba3 g6 (27...a5 28.Re8 Qf5 29.Re7 Kc8 30.Bd6+–) 28.Re8 Qg5 (28...Qf5+–) 29.Re7 Kb6 30.Bc5 Ka6 (30...Ka5 31.Ra7) 31.Ra7 1–0. GuestRHJZ – GuestVXRY, freechess.org, 2020.

4.Nf3 g6 5.e3 Bg7 6.Be2 0–0 7.0–0 e5 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d6 6.Be2 e5 7.0–0 c6).

3.e3 a5

4.b5 cb5 5.Bb5 Nc6 6.a4 Bd7 7.Nf3 Nf6 8.0–0 e6 9.d4 d5 (9...Be7 10.c4=) 10.c4 Be7 11.Nbd2 0–0 12.c5 Nb4 13.Bc3 Bc6 (13...Qc7 14.Ne5+=) 14.Ne5 (14.Qb3 Qc7+–) 14...Qc7 15.Bb4 ab4 16.Qb3 (16.Qc2 Nd7 17.Ndf3 Bb5 18.ab5 Ne5 19.Ne5 b6+=) 16...Bb5 17.ab5 Ra1? (better 17...b6 18.c6 Ra5+=) 18.Ra1+– b6 19.c6 (19.Nc6!? Bc5 (worse 19...bc5 20.Ra7 Qa7 21.Na7+–) 20.Ra7 Qd6+–) 19...Rb8 (19...Bd6 20.Ra6+=) 20.h3 Bd6 21.f4 Ne8 22.Nd7 f6? (better 22...Rd8+–) 23.Nb8 Qb8 24.Ra6?? (24.f5 Nc7+–) 24...Kf7? (better 24...Nc7+–) 25.Qa4 Nc7 26.Ra7 Kg6 27.Rb7 Qf8 28.Nb3 (28.Rb6 e5+–) 28...f5 (28...e5 29.de5 fe5 30.fe5 Be5+–) 29.Rb6 Qf6 30.Rb7 Qh4 31.Kf1 (31.Nd2 Ne8 32.b6 Qe1 33.Nf1 Bf4 34.ef4+–) 31...Qg3 32.b6 (32.b6 Qe3 33.Qa2+– (33.bc7?! Qd3 34.Kg1 Qe3 35.Kf1 Qd3 36.Kf2 Bf4=)) 1–0. BeepBeepImAJeep (2525) – marasmus01 (1965), lichess.org, 2017.

4.b5 c5 5.Be2 a4 6.c4 Nd7 7.Nf3 Ngf6 8.0–0 e5 9.d4 cd4 10.ed4 ed4 11.Bd4 Be7 12.Nc3 0–0 (12...Nc5 13.Qc2+=) 13.Na4+/– Qa5 14.Nc3 Re8 15.Re1 Nc5 16.Nd2 Be6 17.Bf3 Nfd7 18.Nb3 Qb4 19.Nd5 Bd5 20.Bd5 (20.cd5?! Bf6 21.Re8 Re8 22.Bf6 Nb3 23.ab3 Nf6+=) 20...Bf6 (better is 20...Nb6!?+/–) 21.Nc5+– dc5 22.Re8 Re8 23.a3 Qa5 24.Bf6 Nf6 25.Bb7 Rd8 26.Qb3 h5 27.Bf3 1–0. Buedding,Karl_Heinz – Nilsson,Thorbjorn (1930), corr ICCF EM/H/007 ICCF Email, 1999.

3.e3 Qb6

4.a3 a5 5.c3 ab4 6.cb4 c5 7.b5 Bd7 8.a4 Nf6 9.a5 (9.d4 Bf5=) 9...Qc7 (9...Ra5!? 10.Na3 e5=+) 10.b6 Qc6 11.Nc3 e6 12.Bb5 (better is 12.Nf3!?=) 12...Qg2=+ 13.Bd7 Nbd7 14.Qf3 Qf3 15.Nf3 Be7 16.Nb5 0–0 17.Nc7 Rac8 18.Bf6 Nf6 (< 18...gf6 19.Ke2+=) 19.Ke2 d5 (19...Rb8 20.d4=) 20.h4 (better is 20.a6!? Nd7 21.ab7+/–) 20...Bd6 21.Nb5 Bb8 22.h5 (22.a6 ba6 23.Ra6 Rc6=) 22...h6 23.Rhg1 e5 24.Rg2 (24.Nh4 Nh5 25.Nf5 Kh7=) 24...Rfe8 (24...e4!? 25.Nh4 Be5=+) 25.Rag1 Nh5 26.Nh4 Kh7 27.Nf5 g6 28.Nfd6 Bd6 29.Nd6 c4 (29...Rb8 30.Ne8 Re8 31.a6 ba6 32.Ra1=) 30.Ne8 (better is 30.Nb7 Ra8 31.Nd6+/–) 30...Re8= 31.Ra1 Rc8 32.a6 Ra8 (32...ba6!? 33.Ra6 Rb8+=) 33.ab7 Rb8 34.Ra7 Nf6 35.Rg1 Ne4 36.f3 Nc5 37.Rga1 Kg7 38.d3?? (better is 38.R1a5 Nb7 39.Rd5+–) 38...Nd3 (38...Rb7? 39.d4 ed4 40.ed4 Rb6 41.dc5+–) 39.e4 (39.R1a5 Kf6 40.Rd5+=) 39...d4–/+ 40.Kd2 Nc5 41.Rb1 Nb7 (41...Rb7?! 42.Rb5 c3 43.Kc2+=) 42.Rb4 c3 43.Kc2 Nc5 (better is 43...f5–+) 44.Rb5 Ne6 45.b7 Nc7?? (better is 45...Nd8=+) 46.Ra8?? (better is 46.Re5 Ne6 47.Rb5+–) 46...Na8–+ (46...Nb5?? 47.Rb8 Nd6 48.Rg8 Kg8 49.b8Q Nc8 50.Qc8 Kg7 51.Qc5+–) 47.ba8Q Ra8 (47...Rb5?! 48.Kc1=) 48.Re5 Ra2 49.Kd3 (49.Kb3 Rb2 50.Ka3 d3–+) 49...c2 (better is 49...Rd2 50.Kc4 c2–+) 50.Rc5 Ra3 (50...h5 51.e5 h4 52.e6 fe6 53.Rc7 Kf6 54.Kd2–+) 51.Kc2 (51.Kd4 Ra2 52.Ke3 h5–+) 51...Rf3 52.Kd2 (52.Rd5 d3 53.Kc3 h5–+) 52...Re3 53.e5 h5 54.Rd5 h4 (better is 54...g5–+) 55.Rd4 Re5 56.Rh4 g5 57.Rh1 g4 58.Kd3 f5 59.Kd4 (59.Rg1 Kf6–+) 59...Re4 60.Kd3 (60.Kd5 g3 61.Rg1 Rg4–+) 60...Kg6 61.Rg1 Kg5 62.Rf1 (62.Rg2 Kh4 63.Rh2 Kg3–+) 62...Re7 (62...g3 63.Rh1–+) 63.Kd4 (63.Rb1 g3 64.Rg1 f4–+) 63...f4 64.Kd3 (64.Ra1 g3 65.Ra8 f3 66.Rg8 Kh4 67.Rh8 Kg4 68.Rg8 Kh3–+) 64...g3 65.Kd2 (65.Kc3 g2 66.Rg1 f3–+) 65...Kg4 66.Kd3 (66.Rb1 f3 67.Rb4 Kf5 68.Rb8–+) 66...f3 67.Rc1 g2 68.Rc4 Kg3 69.Kc3 f2 0–1. slavisa10 – Ledgendari, Live Game Caissa's Web, 2004.

4.a3 a5 5.c3 Nf6 6.Nf3 (6.d4 Bf5=) 6...e5 7.Be2 (7.d3 ab4 8.ab4 Ra1 9.Ba1 Be7=) 7...Be7=+ 8.0–0 0–0 9.d4 ed4 (9...e4 10.Nfd2=+) 10.Nd4 (10.Qd4 Qd4 11.Nd4 d5=) 10...c5 (10...d5 11.Qd3=) 11.Nb5 Nc6 (11...Be6 12.c4=) 12.bc5 (12.Nd6 ab4 13.ab4 Ra1 14.Ba1 cb4 15.Nc8 Rc8=) 12...dc5= 13.Qc2 a4 (13...Bg4 14.Bg4 Ng4 15.c4=) 14.c4+= Be6 (14...Rd8 15.N1c3+=) 15.N1c3 Rfd8 16.Rad1 (16.Na4 Qa5 17.Nac3 Rd7+–) 16...Ne5? Attacking the isolated pawn on c4 (better 16...Qa5+=) 17.Na4+– (17.Na4 Ra4 18.Rd8 (18.Be5?! Rd1 19.Rd1 Ra8+–) 18...Qd8 19.Qa4+– (19.Be5?! Ra8+–)) 1–0. Janek – Buran, internet free game, 2017.

4.a3 a5 5.Bd4 Qc7 6.b5 (6.ba5 Ra5 7.Bc3 Ra4=) 6...e5 7.Bb2 Nf6 8.c4 (8.Nf3 Be7=) 8...Be7+= 9.Nc3 0–0 10.Nf3 Bg4 (10...e4 11.Ng5=) 11.Be2= Nbd7 12.d4 Rfe8 (12...e4 13.Nd2 Be2 14.Qe2=) 13.0–0 Bf8 (13...Rac8 14.e4=) 14.h3 Bh5 15.a4 (15.e4 Bg6=) 15...ed4 (15...e4 16.Nd2 Be2 17.Qe2=) 16.Nd4 Be2 17.Qe2 Nc5 (17...Be7 18.Rad1=) 18.Rfd1 Rad8 19.Qf3 Nfe4 (19...Nfd7 20.Rab1=) 20.Ne4+= Ne4 21.Rac1 ½–½. Lebel,Patrick (2180) – Svendsen,Bertil (2020), NATO–ch13 Brest, 2002.

4.a3 Nf6 5.Bc4 d5 6.Be2 a5 7.b5 Bf5 8.Nf3 Nbd7 9.Nh4 Be4 10.Nc3 Nc5 (10...e5 11.0–0=) 11.Ne4 Nfe4 12.Rb1 Na4 (12...cb5 13.Nf5 Rg8 14.f3+–) 13.Ba1 c5 (13...Qc7 14.c4 Nac5 15.bc6 Qc6 16.cd5 Qd5 17.Nf3+–) 14.c4 (14.f3!? Nf6 15.c4 g5+–) 14...Qh6+– 15.Qa4 Qh4 16.b6 (16.0–0 d4 17.b6 Kd8+–) 16...Kd8 17.0–0 Nd2? (better 17...d4 18.Rb5 e5 (18...Nd2 19.Rc5 Nc4 20.Rc4+–) 19.Ra5 Rc8+–) 18.Rfd1 Nb1 (18...Ne4 19.Rd5 Nd6+–) 19.Rd5 Kc8 20.Qe8 1–0. Pereira – Trainee, internet, 2020.

3.e3 Qc7

4.c4 e5 5.a4 Bf5 6.Nf3 Nd7 7.b5 f6 (7...Ngf6 8.d4=) 8.Be2 g5 (8...d5 9.cd5 cd5 10.Nc3+=) 9.0–0 h5 10.h3 (10.Nc3!?+=) 10...g4 (10...cb5 11.ab5 g4 12.Nh4=) 11.Nh4 Be6 12.Ng6 Rh7 13.Nf8 Nf8 14.hg4 (14.h4 Ng6=) 14...hg4=+ 15.Bg4 f5 (15...Bc4 16.d3 Be6 17.Bh5 Bf7 18.Bf7 Qf7 19.f4=+) 16.Bh3 (16.Bh5 Bf7 17.Bf7 Qf7=) 16...d5 (16...Qg7 17.Qf3 cb5 (17...Bc4?! 18.Bf5 Bf1 19.Bh7 Bg2 20.Qg2 Qg2 21.Kg2 Nh7 22.Nc3=) 18.ab5 f4 (18...Bc4?! 19.Rc1 Bd3 20.Bf5 Bf5 21.Qf5=) 19.Be6 Ne6=+) 17.cd5+= cd5 18.Qf3 (18.f4 e4+=) 18...Ng6 19.Bf5 (better 19.Rc1 Qg7 A) worse 20.Bf5 Nh4 21.Qg3 Qg3 (21...Nf5?! 22.Qg7 Ng7 23.Be5=; 21...Bf5?! 22.Be5 Qf7 23.Nc3=+) 22.fg3 Nf5–/+; B) 20.Kf1+=) 19...e4?? (better 19...Nh4 20.Qg3 Nf5 21.Qg6 Qf7 22.Qf7 Kf7 23.Be5 Nf6=) 20.Qg4 (better 20.Bg6 Kd7 21.Qf4+– (21.Bh7?! ef3 22.Rc1 Qd8+=)) 20…Qh2 0–1. RichardSommer (2015) – Iamverypoor (1975), lichess.org, 2020.

4.c4 e5 5.Nf3 Nf6 6.Be2 Bg4 7.d3 Nbd7 (7...Na6 8.h3 Bf3 9.Bf3 Nb4 10.a3=) 8.Nbd2 (8.Nc3 h6=) 8...Be7 9.a3 0–0 10.0–0 a5 11.h3 Bh5 12.Re1 (12.Qc2 h6=) 12...Rad8 (12...d5 13.cd5 Nd5 14.ba5 Ra5 15.Nc4 Bf3 16.Bf3+=) 13.g4+= Bg6 14.Nh4 (better 14.g5 Ne8 15.Qc2+=) 14...Rfe8?? (better 14...Ra8+=) 15.g5+– d5 16.gf6 Bf6 (16...Nf6 17.c5+–) 17.Ng6 hg6 18.cd5 cd5 19.Qb3 (19.Rc1 Qb6 20.Qb3 ab4 21.Qd5 e4+–) 19...Qd6 (19...ab4 20.ab4 e4 21.Rec1+–) 20.Rec1 (20.ba5 e4 21.d4 Bh4+–) 20...Qe6 (20...ab4 21.ab4 e4 22.d4+–) 21.Bg4 (21.ba5 Qh3 22.Qd5 e4+–) 21...Qd6 (21...Qa6 22.Qd5 Nb6 23.Qa5 Qa5 24.ba5+–) 22.ba5 Nc5 23.Qb5 Ne6 24.Rc2 (24.a4 Qb8+–) 24...Be7 (24...d4 25.Ne4 Qd5 26.Qd5 Rd5 27.ed4 ed4 28.Re1+–) 25.Bf3 (better 25.Rac1 f5 26.Be2 Kh7+–) 25...Nc7 (25...Ng5+–) 26.Qb7 Rd7 (26...Rb8 27.Qc7 Qc7 28.Rc7 Rb2 29.Rd1+–) 27.Rc6 Ne6 28.Qb6 Qb8 29.Qb8 Rb8 30.Be5 Rbd8 (30...Ra8 31.Nb3+–) 31.Rb1 Bd6 (31...d4 32.e4 Ra7+–) 32.Bd6 Rd6 33.Rd6 Rd6 34.Rb6 Rd7 35.a6 Nc7 (35...Ra7 36.d4 Nc7 37.Rb8 Kh7+–) 36.Rb7 Kf8 37.a7 Ke7 38.Rc7! Rc7 39.a8Q Rc1 40.Kg2 Rc7 41.Qd5 (41.Qd5 f5 42.Nc4 Rd7 43.Qc5 Kf6 44.Qc6 Ke7 45.Ne5 Rd8 46.Qc7 Rd7 47.Qd7 Kf6 48.h4 Ke5 49.Qe7) 1–0. Adlai – Benzol, corr, 2018.

4.c4 e5 5.Nf3 Bg4 6.d4 e4 7.h3 ef3 (7...Bf5!? 8.Nfd2 Nf6=) 8.hg4+= fg2 9.Bg2 Nd7 (9...d5 10.c5+=) 10.b5+– Ngf6 (10...Ne7 11.Nc3+–) 11.g5 Ng8 12.Nc3 White prepares d5 (12.Qc2 h6+–) 12...Nb6 (12...h6 13.Rb1+–) 13.bc6 (13.Qd3 Rc8+–) 13...bc6 14.Qd3 Be7? (better 14...Rb8!?+–) 15.d5 (worse 15.Rh7 Rh7 16.Qh7 0–0–0+–) 15...Bg5 (15...Nd7 16.dc6 Ne5 17.Qc2+–) 16.dc6 Nf6 (16...Bf6 17.Nb5 Qe7 18.Nd6 Kf8+–) 17.Nb5 Qe7 18.c7 (better 18.Nd6 Kf8 19.c7+–) 18...Rc8 (18...d5 19.cd5 Qb4 20.Bc3 Qg4+–) 19.Nd6 Kf8 (19...Qd6 20.Qd6 Nfd7 21.Bg7+–) 20.Nc8 Nc8 21.Ba3 1–0. Adlai – Noel, corr, 2018.

4.c4 e5 5.Nf3 Bg4 6.d4 Bf3 7.Qf3+= Nd7 (7...d5 8.a3 e4 9.Qd1+=) 8.Nc3 Ngf6 9.Bd3 Be7 (9...d5 10.cd5 ed4 11.ed4 Bb4 12.dc6 Qc6 13.Qc6 bc6 14.a3+=) 10.0–0+– h5 (10...Qb6 11.b5+=) 11.Rfe1 0–0 12.a3 g6 13.Qg3 Ng4 14.h3 Ndf6?? (better 14...Ngf6+–) 15.hg4+– Ng4 16.f3 Ne3 (16...Nf6 17.f4+–) 17.Re3 ed4 18.Bg6! de3 (18...fg6 19.Qg6 Double attack) 19.Bf5 Kh8 20.Nd5 f6 21.Qg6 (21.Qg6 Rf7 22.Qf7 Bf8 23.Bf6 Bg7 24.Bg7) 1–0. Janek – James, internet, 2016.

4.c4 Nf6 5.a4 (5.Bf6 ef6 6.d4 d5=) 5...e5 6.b5 a5 7.Nf3 Be7 8.Be2 Bg4 9.0–0 Nbd7 10.d4 0–0 11.Nc3 Rfe8 12.Rc1 Rad8 13.h3 Bh5 14.bc6 (14.g4 Bg6=) 14...bc6 15.d5 Nc5 16.dc6 (16.Ba3 h6=) 16...Qc6=+ 17.Nd5 (17.Nb5!?=+) 17...Nd5–/+ 18.cd5 Qb7 (better 18...Qa4!? 19.Qa4 Na4–/+) 19.Bb5= Rf8 20.Bc3 Qa7 21.Be2 Ne4 (21...Rc8 22.Bb5=) 22.Ba1 Rc8 23.Rc8 Rc8 24.Nd2 (24.Nd4!? Be2 25.Qe2= (worse 25.Ne2 Qc5=+)) 24...Be2=+ 25.Qe2 Nc3 (25...Rc2!? 26.Qd3 Rd2 (26...Nd2?! 27.Qc2 Nf1 28.Qc8 Bf8 29.Kf1=) 27.Qe4 Qc5–/+) 26.Qg4 (better 26.Bc3 Rc3 27.Qb5+=) 26...Nd5?? (better 26...Qb7 27.Bc3 Rc3=) 27.Qc8+– Bf8 28.Nc4 Qe7 (28...Nb6 29.Nb6 Qb6 30.Rc1+–) 29.Rd1 h6 (29...Qe6 30.Qe6 fe6+–) 30.Rd5 f5 (30...f6 31.Bc3+–) 31.Qf5 (31.Nd6 f4+–) 31...Qf7 32.Qf7 Kf7 33.Rd6! Bd6 34.Nd6 Ke6 35.Nc4 Kd5 36.Na5 Kc5 (36...g6 37.f3 e4 38.fe4 Ke4 39.Nc4+–) 37.Nb7 Kb4 38.Nd6 (38.Be5 g6 39.a5 Kb5+–) 38...Ka4 39.Nc4 Kb3 40.Ne5 Kc2 41.Nf3 (better 41.Ng6 Kb3+–) 41...Kb1 42.Bg7 h5 43.Bh6 Kc2 44.g4 (better 44.e4 Kd3 45.e5 Ke4+–) 44...Kd3 45.gh5 Ke4 46.Kg2 Kf5 47.Kg3 Kf6 48.Kg4 Kf7 49.Bg5 Kg7 50.h6 Kh7 (50...Kf8 51.Bf6 Kf7 52.Kf5 Kg8 53.Ng5 Kf8 54.h7 Ke8 55.Ke6 Kf8 56.h8Q) 51.Kf5 Kg8 52.Kg6 Kh8 (52...Kf8 53.h7 Ke8 54.Ne5 Kf8 55.h8Q) 53.Be7 Kg8 54.Bd6 (54.h7 Kh8 55.Bf6) 54...Kh8 55.e4 Kg8 56.e5 (56.h7 Kh8 57.Be5) 56...Kh8 57.e6 Kg8 58.e7 Kh8 59.e8Q 1–0. BeepBeepImAJeep (2610) – Corksucker (1960), lichess.org, 2017.

4.Qf3 Nd7 5.Bc4 (better 5.a3=) 5...Ne5?? (5...d5 6.Be2=+) 6.Qe2?? (better 6.Be5 Nf6 7.Bf6 ef6 8.Qg3+–) 6...Nc4=+ 7.Qc4 e5 8.b5 Bd7 9.a4 cb5?? (better 9...Nf6–/+) 10.Qc7+– Nf6 (10...Bc6 11.e4! ba4 12.f3+–) 11.Qb7 Rd8 (11...Rc8 12.ab5 Rc2 13.Ba3+–) 12.ab5 Be7 13.b6 (better 13.d4 Bc8 14.Qa7 Rd7+–) 13...ab6 14.Qb6 0–0 15.Ra7 Rb8 16.Qc7 (16.Rb7 Bd8 17.Qa7 Rc8+–) 16...Rbd8 (16...Rfc8 17.Rb7 Rc7 18.Rb8 Bc8+–) 17.Nf3 h6 18.0–0 Rfe8 19.Qc4 (19.Nc3 Bf5+–) 19...Be6 (19...Rc8 20.Qb3+–) 20.Qh4 Kh7 (20...Rc8 21.Rc1+–) 21.Re7! Re7 22.Be5! de5 23.Ne5 Ne8 (23...Rc8 24.Rc1+–) 24.Qh5 (better 24.Qe7 Rb8 25.Nf7 Bf7 26.Qf7+–) 24...Nf6 25.Qg4 (better 25.Qd1 Bd5 26.d4+–) 25...Ng4= 26.Ng4?? (better 26.Nc6 Ree8 27.Nd8 Rd8 28.d4=+) 26...Bg4–+ 27.f3 Be6 0–1. atif_zubair – MURF663, lichess.org, 2019.

4.Nf3 e5 5.c4 e4 (5...Nf6 6.Be2=) 6.Nd4 Nf6 7.Nc2 (7.d3 d5 8.a3 dc4 9.dc4 a5=) 7...Nbd7 (7...Be7 8.d3=) 8.d4 (8.d3 a5=) 8...d5 9.Nc3 a5 (9...dc4 10.Bc4 Bd6 11.Rc1=+) 10.b5= dc4 11.Bc4 Nb6 12.Be2 c5 (12...Nbd5 13.Nd5 cd5 14.Rc1=) 13.0–0 (13.Rc1 c4=) 13...Be6 (13...Bd6 14.dc5 Qc5 15.Rc1=) 14.dc5 Nc4 (14...Bc5 15.Nd4 Bd4 16.ed4= (16.Qd4? Rd8 17.Ne4 Rd4 18.Nf6 gf6 19.Bd4 Rg8–+)) 15.Bc4 Bc4 16.b6 (16.Ne4!? Ne4 17.Qd4=) 16...Qc5=+ 17.Na4 Qb5 (17...Qg5 18.f4 Qh4 19.Bf6 Qf6 20.Rf2=) 18.Nd4 Qg5 19.f4 Qg6 20.Re1 Bb4 21.f5 (21.Bc3 0–0=+) 21...Qh6 22.Nc3 (22.Bc3 Bd6 23.g3 0–0=+) 22...0–0–/+ 23.Nc2 (23.a3!? Bd6 24.g3–/+) 23...Rfd8–+ 24.Qc1 Bd6 25.h3 Qg5 26.Nd4 Rac8 27.Ba3 (27.Qb1 Qg3 28.Nce2 Qe3 29.Kh1–+) 27...Be5 28.Be7 (28.g4 Qh4 29.Qd2 Bd4 30.ed4 Qg3 31.Qg2 Qc3–+) 28...Qg3 (28...Bd4 29.ed4 Qf5 30.Bd8 Rd8 31.Ne4 Ne4 32.Qc4 Qf2 33.Kh1+/–) 29.Nce2 Be2 (30.Ne2 Qh2 31.Kf2 Rc1 32.Rac1 Re8–+) 0–1. Dopper,Johan – Van Geemen,A, corr, 1989.

3.e3 Nd7

4.a3 Qc7 5.Nf3 e5 6.d4 Ngf6 7.de5 de5 8.c4 b6 9.Nc3 Bb7 10.Nd2 (10.Bd3 c5 11.Nb5 Qb8 12.bc5 A) 12...Bc5?! 13.Bf5=; B) 12...Nc5?! B1) worse 13.Ne5 a6–/+ (13...Bg2?! 14.Rg1=; 13...Nd3 14.Nd3 Bg2 15.Be5+=); B2) 13.Bb1 Nfd7 14.0–0=; C) 12...e4 13.cb6 ab6–/+) 10...Be7 11.Qc2 (11.Bd3 0–0=+) 11...Nf8 (11...a5 12.b5=+) 12.0–0–0 (12.Bd3!?=) 12...Ng6 13.Nde4 (13.h4 a5 14.b5 Ng4=+) 13...0–0 (13...Ne4 14.Qe4 0–0 15.h4 Bh4 16.Qf5=+ (16.Rh4? f5 17.Qd3 Nh4–+)) 14.h4 (14.Nf6 Bf6 15.Qf5 Rfd8–/+) 14...Ne4–/+ 15.Ne4 h6 (better 15...a5!? 16.h5 Nh4–/+) 16.h5= White intends c5 16...Nh8 17.f4 (17.c5 a5=) 17...f6 (better 17...ef4!? 18.Qc3 f6=+) 18.fe5= fe5 19.c5 Nf7 20.Bc4 Kh8 (20...a5 21.Nd6 Bd6 22.cd6+–) 21.Rhf1 Ng5 22.Nd6 (better 22.Ng5 Bg5 23.Qe4 Rf1 24.Rf1+– (24.Bf1?! Qf7+–)) 22...bc5?? (better 22...Rf1 23.Bf1 Bf6+=) 23.Be5+– Bd6 (23...Rf1 24.Bf1 Bf6 25.Bf6 gf6+–) 24.Rd6 (better 24.Rf8 Rf8 25.Rd6 Qd6 26.Bd6+–) 24...Qe7 (24...Rf1 25.Bf1 Qd6 26.Bd6 Re8 27.Bc5 Ne4 28.Ba7 c5 29.bc5 Bc6+–) 25.Rh6 Nh7 26.Qh7 (26.Rh7?!=) 1–0. FeegLood (2635) – palfm (2305), lichess.org, 2015.

4.c4 Qb6 5.a3 Ngf6 (5...a5 6.b5=) 6.Nc3 (6.d4 e5=) 6...e5 7.d4 Be7 8.Nf3 Qc7 (8...0–0 9.Bd3=) 9.Bd3 h6 (9...0–0 10.0–0+=) 10.0–0+= a6 (10...0–0 11.Qc2+=) 11.a4 g6 (11...0–0 12.Re1+=) 12.a5+– g5 13.h3 (13.Bf5 Nf8 14.Bc2 g4+–) 13...Ng8 (13...g4 14.hg4 Ng4 15.Re1+=) 14.Qb3 (14.Na4 Bf6+–) 14...Ngf6 15.b5 ab5 16.cb5 Rb8 (16...g4 17.hg4 Rg8 18.bc6 bc6 19.Rfc1 ed4 20.Nb5+–) 17.Rfd1 (17.b6 Qd8 18.de5 Nc5+–) 17...g4+– 18.hg4 Ng4 19.Qc2 Ngf6 (19...Qd8 20.de5 Nge5 21.Ne5 Ne5 22.Ne4+–) 20.bc6 (20.Ne4 Ng4 21.b6 Qd8 22.de5 Nde5 23.Ne5 Ne5+–) 20...bc6+– 21.Nb5! cb5?? (21...Rb5 22.Bb5 Combination; 21...cb5 22.Qc7 Pinning (22.Qc7 Deflection; 22.Qc7 Clearance)) 22.Qc7 0–0 (22...e4 23.a6 Ba6 24.Be4+–) 23.de5 de5 24.Ne5 Rb7 25.Qc6 Ne5 (25...Nc5 26.Bb5 Nb3 27.a6+–) 26.Be5 Nd7 27.Qh6 Bf6 (27...Nf6 28.Bf6 Bf6 29.Qh7) 28.Qh7 1–0. Pierre – Waldorffy, internet, 2020.

4.c4 Qc7 5.a4 e5 6.b5 c5 (6...Ngf6 7.d4=+) 7.Nf3 b6 8.Nc3 Bb7 9.d3 g6 10.e4 Bg7 11.Be2 h6 12.0–0 Ne7 13.Nd2 g5 (13...0–0 14.Qc2=) 14.Nd5 Bd5 15.cd5 Ng6 16.Nc4 Nf4 17.Bg4 0–0 18.Bf5 Rad8 19.g3 (19.a5 ba5 20.Ra5 Rb8+–) 19...Ng6 20.a5 Nf6 21.ab6 ab6 22.Ra6 Rb8 23.Qf3 Ne7 24.Rfa1 Rb7 25.Ra8 Rfb8 26.Rb8 Rb8 27.Ra6 Nf5 28.Qf5 (worse 28.ef5 Qd7–/+) 28...Rb7?? (28...Nd7 29.f4 gf4 30.gf4+–) 29.Bc3 (better 29.Nd6 Rb8 30.Be5+–) 29...Rb8+– 30.Qf3 (30.f4 gf4 31.gf4 Nd7+–) 30...Qd8 (better 30...Qd7!?+=) 31.Qd1 h5 32.Ra7 h4 (32...g4 33.Qf1+–) 33.g4 (33.Bd2 hg3 34.fg3 g4+–) 33...Qc8 (33...Nh7 34.Qf3 f6 35.Qf5+–) 34.h3 (34.Bd2 Ne8 35.Bg5 Rb7 36.Rb7 Qb7 37.Bh4 Qd7+–) 34...Qd8 (34...Ne8+–) 35.Ra6 (35.Qf3 Rc8+–) 35...Qc7 (35...Ne8 36.Rb6 Rb6 37.Ba5+–) 36.Qa1 (36.Bd2 Nh7+–) 36...Rb7 (36...Ne8!?+–) 37.Ra8 Kh7 38.Qa6 Nd7? (38...Rb8+–) 39.Re8 (39.Nd6 Rb8 40.Nf7 Ra8 41.Ng5 Kg6 42.Qa8+–) 39...Bf6 40.Qa8 Rb8 41.Rb8 Nb8 42.Qa4 Nd7 43.Qa6 Kg6 44.Bd2 Qb8 45.Ne3 Qc7 46.Nf5 Nf8 (46...Nb8 47.Qa1+–) 47.Qa2 (47.Qa8 Qd8 48.Qc6 Nd7+–) 47...Bd8 (47...Qb8 48.Bc1+–) 48.Qc2 (48.Qa8 Qd7+–) 48...Qd7 (48...Bf6 49.Qa4+–) 49.Qd1 (49.Qa4 Nh7+–) 49...Kh7 (49...Qb5 50.Bc1=) 50.Qf3 (better 50.Qa4!?+–) 50...Kg8 51.Ne3 (51.Be3 Ng6+=) 51...Ng6 (51...Qb5 52.Nf5 Qd7 53.Kh2=) 52.Qf5 Qf5? (better 52...Qb5!? 53.Qc8 Qe8+=) 53.Nf5+– (53.gf5 Nf4 54.Nc4 Nh3 55.Kg2 Nf4 56.Bf4 ef4 57.Nd6 Kf8+–) 53...Nf4 (53...Be7!? 54.Ne7 Ne7 55.Bg5+–) 54.Bf4 (54.Bf4 ef4 55.Nd6+–) 1–0. BeepBeepImAJeep (2555) – nohchi_borz (2295), lichess.org, 2017.

4.c4 Qc7 5.a4 Ngf6 6.Nf3 e5 7.b5 Be7 8.Be2 0–0 (8...e4 9.Nd4=) 9.0–0= Re8 10.d4 Bf8 (10...c5 11.a5=) 11.Nc3 h6 12.Rc1 a6 13.h3 ab5 14.cb5 c5 15.de5 Ne5 16.Ne5 de5 17.Nd5 (17.Qc2 Be6=) 17...Nd5=+ 18.Qd5 Be6 (18...Ra4 19.Rfd1=+) 19.Qe4 b6 (19...Bd6 20.Rfd1=) 20.Qe5 (better 20.Be5!? Qe7 21.f4+=) 20...Qe5= 21.Be5 Ra4 22.Bf3 (22.Ra1 Bc4 23.Bc4 Rc4=) 22...Bc4 23.Bg3 (better 23.Bc7!?=+) 23...Bf1–/+ 24.Kf1 Rb4 (24...c4 25.Rc2–/+) 25.Bc6 Rd8 26.Bc7 Rd2 (26...Rc8!? 27.Be5 g5–/+) 27.Bb6=+ Rbb2 28.f4 Rf2 29.Kg1 Rg2?? (better 29...Rfe2=) 30.Bg2+– Rb5 31.Bc7 Rb2 32.Be5 Re2 33.Rc3 c4? (33...Rd2+–) 34.Bf1 Re1 35.Rc4 Re3 (35...f6 36.Bd4 Rd1 37.Kf2+–) 36.Kf2 Ra3 (36...Re5 37.fe5 g5 38.Rc7+–) 37.Rc7 (better 37.Rc8 Ra2 38.Ke3+–) 37...f6 38.Bc4 Kh7 39.Bf6 Kg6 (39...Rh3 40.Bd4 Rh2 41.Kf3+–) 40.Be5 Ra4 (40...Kh5 41.Rc8 (41.Bg7 Bg7 42.Rg7 Ra4 43.Be2 Kh4+–) 41...Be7 42.Bg7+–) 41.Bd3 (41.Rc6!? Kh7 42.Rc8 Rc4 43.Rc4 Kg6+–) 41...Kh5 42.Be2 (42.Ke3!? g6+–) 42...Kh4 43.Bg7 (43.Rc6!? g5+–) 43...Bg7 44.Rg7 Rf4 45.Kg2 Re4 46.Rg4 (better 46.Bg4+–) 46...Rg4= 47.hg4 Kg5 48.Kg3 h5 49.gh5 Kh6 50.Kg4 Kg7 51.Kg5 Kh8 52.Bd3 Kg8 53.Kh6 Kh8 54.Kg6 Kg8 55.Be2 Kh8 56.Kf7 Kh7 57.Bf3 Kh6?? (57...Kh8 58.Bg4=) 58.Kf6 (better 58.Kg8+–) 58...Kh7= 59.Kf7 Kh8 60.Kg6 Kg8 61.h6 Kh8 62.Bg4 Kg8 63.Bh3 Kh8 64.Bg2 Kg8 65.Bf1 Kh8 66.Kh5 Kg8 67.Bd3 Kh8 68.Bc4 Kh7 69.Bb3 Kh8 70.Bc2 (70.Bc2 Kg8 71.Kh4=) 1–0. BeepBeepImAJeep (2590) – SiNsUaT12 (2185), lichess.org, 2018.

4.c4 e5 5.a4 g6 (5...Ngf6 6.d4=+) 6.b5 Bg7 7.Nc3 Ne7 8.Nf3 0–0 9.Be2 h6 (9...e4 10.Nd4=) 10.d4+= f5 11.0–0 e4 12.Nd2 Nf6 13.Qb3 d5 14.Ba3 Re8 15.bc6 bc6 16.cd5 cd5 (16...Ned5 17.Rfc1+=) 17.Nb5 Qb6 (17...Rb8 18.Qc2+=) 18.Bc5 Qb7 19.Qc2 (19.Qa3 Qd7+–) 19...Rd8 20.Nd6 (20.Rfb1 a6 21.Nc3 Qd7+–) 20...Qd7 (20...Qc7 21.Nc8 Rac8 22.Rfc1+=) 21.Bb5 (21.Rab1 Qe6 22.Nb5 Rd7+=) 21...Qe6= 22.Nc8 White gets in control 22...Rac8 23.Qd1 a6 (23...Rc7 24.Qe2=) 24.Be2 (24.Be7 Qe7 25.Ba6 Ra8+–) 24...g5 (24...Re8 25.Nb3+=) 25.Rb1 (25.Be7!? Qe7 26.Ba6+–) 25...Ng6 26.Rb6 Rc6 27.a5 Rdc8? (better 27...Nd7=) 28.Ba6+– R8c7 29.Bb5 Rb6 30.ab6 Rb7 31.Qa4 Rb6 32.Bb6 Qb6 33.Rc1 Qe6 (33...f4 34.Rc6 Qd8 35.Qa6+–) 34.Qa6 (better 34.Qa8!? Kh7+–) 34...Qa6 35.Ba6 Kf7 36.Bc8 Ne7 37.Rc7 Ke8 (better 37...Ne8 38.Ra7 Nd6+–) 38.Be6 f4 39.Nb3 fe3 40.fe3 Kd8 (40...Kf8+–) 41.Ra7 Ne8 (41...h5 42.Nc5 Bh6 43.g4 hg4 44.Na6+–) 42.Nc5 (better 42.Rd7 Kc8 43.Re7 Kb8 44.Re8 Kc7 45.Bd5+–) 42...Nc8 (42...Nf6+–) 43.Rd7 1–0. BeepBeepImAJeep (2645) – Luckyriver (2390), lichess.org, 2017.

4.c4 g6?? 5.a4 (better 5.Bh8 Ngf6 6.d4+–) 5...Ngf6= 6.b5 Bg7 7.Nf3 0–0 8.Be2 e5 9.0–0 Re8 10.d4 e4 11.Nfd2 d5 12.Nc3 h5 (12...cb5 13.Nb5 dc4 14.Nc4+=) 13.Rc1 Nf8 14.bc6 b6? (better 14...bc6 15.cd5 cd5+=) 15.cd5+– Nd5 16.Nd5 (16.Nde4 Nc3 17.Nc3 Bf5+–) 16...Qd5 17.Bc4 Qg5 18.Re1 (18.Qb3 Bh3 19.Bf7 Kh8+–) 18...Bh3 The mate threat is Qxg2 19.Bf1 Rad8? (19...Bf5 20.c7+–) 20.g3 (better 20.f4 ef3 21.Nf3 Qg4+–) 20...Bg4 (better 20...Bf1!? 21.Rf1 h4+–) 21.Qc2 Bf3 (21...Qd5 22.c7 Rc8 23.Ba6+–) 22.Nf3 ef3 23.Red1 (23.c7 Rc8 24.Ba6 Ne6+–) 23...h4 (23...Ne6 24.h4 Qf6 25.e4+–) 24.d5 (better 24.c7!? Rc8 25.Ba6 hg3 26.hg3+– (26.Bc8?? gh2 27.Kh2 Qg2)) 24...hg3 25.hg3 Nh7?? (better 25...Bb2 26.Qb2 Rd5 27.Rd5 Qd5+–) 26.Bg7 Kg7 27.Rd4 (27.c7 Rd5 28.c8R Rc8 29.Qc8 Nf6+–) 27...Nf6 28.Rh4 (28.d6 Re3 29.c7 Rh8+–) 28...Rh8?? (28...Nd5 29.e4 Nc7 30.Qc3 Re5 31.Rf4+=) 29.Qc4 (better 29.c7 Rc8 30.Rh8 Rh8+–) 29...Nd5? (29...Rh4 30.Qh4 Qe5 31.Qf4+–) 30.Rd1 (30.Qd4!? Qf6 31.Rh8 Qd4 32.Rd8 Qb2+–) 30...Rh4? (better 30...Ne7 31.Rd8 Rd8+–) 31.Qh4+– Qh4 32.gh4 Rd6 33.c7! Rc6 (33...Nc7 A pinning theme 34.Rd6) 34.Rd5 Rc7 35.Rd4 (35.Kh2 Rc1 36.Bd3 Ra1+–) 35...f5? (35...Rc1+–) 36.Rf4 (36.Kh2 Kf6+–) 36...Kf6 37.Rf3 Rc1 38.Rf4 Ra1 39.Kg2 Ke5 40.Bb5 a5 (40...Rc1 41.Rd4 Ke6 42.Bc4 Kf6 43.Kf3+–) 41.Kf3 (41.Rc4 Rd1 42.Rc6 Rd6+–) 41...Kf6 (41...Rc1 42.Rd4+–) 42.Bd3 (42.Rc4 Rh1+–) 42...Ra2 (42...Ke5 43.h5 Ra3 44.Bb1 gh5 45.Bf5+–) 43.h5 (better 43.e4!? Ra3 44.Ke3 Kg7 45.ef5 gf5+–) 43...Ra3 44.Be4 (better 44.Bb1 gh5 45.Rf5 Ke7 46.Bc2+–) 44...Ra4+– 45.Bc6 g5?? (better 45...Rf4 46.Kf4 gh5+–) 46.Ra4+– g4 (46...Kg7 47.Rd4 Kh6 48.Rd6 Kg7 49.h6 Kf7 50.Rd7 Kg6 51.h7 a4 52.h8Q g4 53.Kf4 g3 54.Qg7 Kh5 55.Qg5) 47.Kf4 g3 48.fg3 Kg7 49.Bb5 Kh6 50.Rc4 Kh5 (50...Kg7 51.Kf5 Kh7 52.Rc7 Kg8 53.h6 a4 54.h7 Kh8 55.Kg6 a3 56.Rc8) 51.Rc6 a4 52.Be2 1–0. BeepBeepImAJeep (2610) – Luckyriver (2405), lichess.org, 2017.

4.Nf3 e5 5.c4 (5.Be2 Qb6 6.a3 c5=) 5...Be7 (5...Ngf6 6.Be2=) 6.d4 (6.Be2 Qb6=) 6...e4 7.Nfd2 d5 8.b5 Ngf6 9.Nc3 (9.bc6 bc6 10.Ba3 Ba3 11.Na3 Qa5=) 9...0–0 10.a4 (10.Rb1 cb5 11.cd5 b4 12.Nce4 Nd5=) 10...a6 (10...cb5 11.cd5 b4 12.Nce4 Nd5 13.Bd3=) 11.Be2 ab5 (11...cb5 12.ab5 dc4 13.Qc2=) 12.ab5 Ra1 13.Qa1 Bb4 (13...Qc7 14.Ba3 Ba3 15.Qa3 dc4 16.Bc4+=) 14.0–0 Qa5 (14...Qc7 15.Ba3 Ba3 16.Qa3 dc4 17.Rc1=) 15.Qa5+= Ba5 16.Ra1 Bc7 17.Ba3 (17.c5 Bb8+/–) 17...Re8 18.Bb4 h6 19.Nb3 (19.h3 Kh7+=) 19...dc4= 20.Bc4 Nb6 21.Be2 Nbd5 22.Nd5 Nd5 23.Ba5 Ba5 24.Ra5 Be6 25.bc6+= bc6 26.Nc5 Rb8 27.Ne4+/– Rb1 28.Bf1 f5 29.Ng3 Nc3 30.f3 Nd5 31.Kf2 f4 32.ef4 Rb2 33.Be2 Nf4+= 34.Ra4 Bb3 35.Ra8 Kh7 36.Rb8 h5 37.h4 Nd3 38.Ke3+/– Nc1 39.Rb7 Ra2 40.Bd3 Nd3+/– 41.Kd3 Rg2 42.Nh5 Bd1 43.Ke4 Re2 44.Kf5 Rg2 45.Nf6 Kh6 46.Ng4 Kh7 47.Ne5 Rd2 48.Rd7 Bc2 49.Kf4 Ba4 50.Rd6 Rc2 51.Kf5 Rc3 52.Ke6 Bb3 53.Ke7 c5 54.d5 Re3 55.f4 Re4+/– 56.Ke6 Rf4+= 57.Kd7 Rh4–/+ 58.Kc6 c4 59.Nf7 Rg4 60.Re6? Rg6?? 61.Rg6 Kg6–+ 62.Ne5 Kf5 63.Nf3 g5 64.d6–/+ Ba4 65.Kc5 c3–+ 66.Kb4 c2 67.Nd4 Kf6 68.Ne2 Ke6 69.Ka4 Kd6 70.Kb3 ½–½. Bolk – Braeutigam, OBT, 1997.

4.Nf3 Ngf6 5.d4 (5.Be2 e5=) 5...Qb6 (5...e5 6.de5 de5 7.a3=) 6.a3 a5 7.c3 c5 (7...e5 8.de5 Ne5 9.Nbd2=) 8.b5 a4 (8...e5 9.c4=) 9.c4+= Qc7 10.Nbd2 (10.d5 g6+=) 10...g6 11.Rc1 Bg7 12.Be2 0–0 13.0–0 Nb6 14.e4 (14.Bd3 Rd8=) 14...Rd8 15.d5 (15.dc5!? dc5 16.Be5+=) 15...Ne4= 16.Bg7 Nd2 17.Qd2 Kg7 18.Qc3 Kg8 19.Ng5 h6 20.Ne4 f5 21.Qg3 Kh7 (21...fe4 22.Qg6 Kh8 23.Qh6 Kg8 24.Rc3 Qc6 25.Rg3 Bg4 26.Bg4 Nd5 27.Be6) 22.Nd2 e6 23.Qh4 (23.de6!? Be6 24.Rfe1=+) 23...ed5–/+ 24.Rc3 g5 25.Qh5 Qg7 26.Rg3 Be6 27.h4 g4 28.Nf3 Kg8 29.Bd3?? Qf6 30.Re1 Rf8 31.Nh2? dc4 32.Ng4 fg4 33.Re6 Qe6 34.Rg4 Kh8 35.Bg6 Qe1 36.Kh2 Qe5 (37.Qe5 de5–+; 36...Rf2?? 37.Qh6 Kg8 38.Be8; 36...Qf2?? 37.Qh6 Kg8 38.Qh7) 0–1. Krueger,Bernhard – Koenig,Eugen, Baunatal op, 1998.

4.Nf3 h6 5.c4 Ngf6 6.a4 g5 7.h3 Bg7 8.Nh2 Nf8 9.Be2 h5 10.0–0 g4 11.h4 Ng6 12.g3 Qc7 13.d4 Ne4 (13...Bf5 14.a5=) 14.Kg2 (14.Qc2 d5 15.cd5 Bf5+=) 14...d5 15.Qc2 Bf5 16.Bd3 Bf6?? (better 16...Qd6 17.c5 Qe6=) 17.cd5+– Nh4? (17...Ng3 18.fg3 Bd3 19.Qd3 cd5+–) 18.gh4 g3 19.fg3?? (better 19.Nf3 Qd7 20.Rh1+– (20.fg3 Bh3 21.Kg1 Rg8 22.Be4 Rg3 23.Kh2 Rg2 24.Qg2 Bg2 25.Kg2 Qg4 26.Kh1 Qe4+–)) 19...Qg3?? (better 19...Bh3! 20.Kh1 Ng3 21.Kg1 Rg8–+ (21...Nf1?! 22.Nf1 Rg8 23.Kh1–+)) 20.Kh1+– Rg8?? (better 20...Qe3 21.Rf3 Qe1 22.Nf1 Bg4=+) 21.Be4+– Be4 22.Qe4 Rg4 (22...Qh4 23.Qh4 Bh4 24.Nc3+–) 23.Qf3 (better 23.Ng4 hg4 24.Ra3 Qh4 25.Kg1 cd5 26.Qd5 g3+–) 23...Qh4 (23...Qf3 24.Rf3 Rh4+–) 24.dc6 bc6 (24...Rg8 25.cb7 Rb8+–) 25.Qc6 Kf8 26.Qa8 Kg7 27.Nd2 (better 27.Nc3 Qh3 28.Qf3 Rh4 29.Rg1 Kh6+–) 27...Bg5 28.Qf3 (better 28.d5 Bf6 29.Bf6 ef6 30.d6 Rb4 31.d7+–) 28...Rg3 29.Qf7 Kh6 30.Ndf3 (30.Qf8 Kg6 31.Qg8 Kh6 32.Rf7 Rg1 33.Rg1 Qh2 34.Kh2 Bf4 35.Rf4 h4 36.Rh4) 30...Qe4+– 31.d5 Bf6 32.Bf6 ef6 33.Qf6 Rg6 34.Qf8 (34.Qh8) 34...Rg7 (34...Kh7 35.Rac1 Rg1 36.Rg1 Qg4 37.Qf7 Kh8 38.Rc8 Qc8 39.Qh5) 35.Rg1 (35.Rac1 Kg6 36.Rg1 Qg4 37.Ng4 hg4 38.Rg4 Kh5 39.Qf5 Rg5 40.Qg5) 35...Qe7 36.Qf4 Kh7 (36...Qg5 37.Rg5 Rg5 38.Qg5 Kh7 39.Rg1 h4 40.Qh4) 37.Rg7 Qg7 38.Rg1 (38.Rg1 a5 39.Ng5 Kg8 40.Qb8 Qf8 41.Ne6 Kh7 42.Nf8 Kh6 43.Qd6; 38.Ng5 Kg6 39.Rg1 Qf6 40.Ne4 Kf7 41.Qf6 Ke8 42.Nd6 Kd7 43.Rg7) 1–0. Abdullaevich (1945) – Alexandr02 (1975), lichess.org, 2020.

4.c4 Ngf6

5.a4 e5 6.b5 Be7 7.Nc3 0–0 8.Nf3 e4 9.Nd4 d5 (better 9...Ne5=+) 10.bc6+= dc4?? (better 10...Nb6+=) 11.cd7+– Bd7 12.Bc4 Rc8 13.Be2 Qb6 (13...Bc5 14.Nb3 Bd6 15.Nb5+–) 14.Rb1 Qe6 (14...Rfe8+–) 15.Ne6 Be6 16.0–0 (16.Nb5 Rcd8+–) 16...Rfd8 17.Rc1 Rc7 (17...Bb4 18.f3+–) 18.Nb5 (18.Ne4!? Nd5+–) 18...Rcd7 (18...Rc1 19.Qc1 a6 20.Nd4+–) 19.Nd4 Bd5 (19...b6 20.Bb5 Rd5 21.Rc7+–) 20.Bb5 Rd6 21.Ba3 Rb6 22.Be7 Rc8 23.Rc8 Ne8 24.Re8 1–0. BeepBeepImAJeep (2680) – bugdog (2120), lichess.org, 2016.

5.a4 e5 6.b5 Be7 7.Nf3 0–0 8.d4 a6 (8...e4 9.Nfd2=+) 9.de5= de5 10.Ne5 (10.Be5 Ne5 11.Ne5 Qa5 12.Nd2 Ne4–+) 10...ab5 (10...Bb4 11.Ke2 Qe7 12.Nd3=) 11.Nd7+= Bd7 12.ab5 Ra1 13.Ba1 cb5 14.cb5 Ne4 (better 14...Bb4 15.Bc3 Bc3 16.Nc3 Qa5=+) 15.Bd3 (15.Qd4 Qa5 16.Nd2=+) 15...Qa5 16.Ke2 (16.Kf1 Bb5 17.Bb5 Qb5 (17...Qa1?! 18.Bd3 Rc8 19.Be4–/+) 18.Kg1 Rc8–+) 16...Qa1 (16...Bb5?! 17.Qc2 Bd3 18.Qd3 Qh5 19.f3 Ng3 20.hg3 Qh1 21.Kf2–+) 17.Be4 Bb5 18.Bd3?? (18.Kf3 Qf6 19.Kg3 Qe5 20.Kf3 Qh5 21.Kg3–+) 18...Rd8 19.Bb5 Rd1 20.Rd1 Qb2 21.Nd2 Qb5 22.Kf3 (22.Ke1–+) 22...Qd3 23.Ne4 (23.h3–+) 23…Qd1 (23...Qd1 24.Kf4 Qd5–+) 0–1. BeepBeepImAJeep (2660) – kranty (2775), lichess.org, 2017.

5.a4 e5=+ 6.b5 Be7 7.Nf3 0–0 8.Be2 Nc5 (8...Rb8 9.0–0=) 9.d4= ed4 10.Nd4 (10.Qd4? Nb3 11.Qc3 Na1–+; 10.ed4?! Ne6=) 10...Bd7 11.0–0 Re8 12.Nd2 Bf8 13.N2b3 Nce4 14.Rc1 d5 (14...a6 15.a5+=) 15.cd5 cd5 16.Nf3 Rc8 17.Nbd4 Bb4 18.Qb3 a5? (18...Qa5 19.Rc8 Rc8 20.Ra1=) 19.Rfd1?? (better 19.ba6 Qa5 20.Rc8 Rc8 21.ab7+–) 19...Qe7 20.h3 h6 21.Rc2 Rc2 22.Qc2?? (22.Nc2 Bd6=) 22...Rc8?? (better 22...Nf2 23.Rf1 Rc8–/+) 23.Qb1 Bc3 24.Rc1 Bb2 (24...Qb4 25.Bc3 Rc3 26.Bd1=) 25.Rc8+= Bc8 26.Qb2 Qc5 27.Ne5 Nc3 28.Nd3 Ne2 29.Qe2 Qc4 30.Qc2 Ne4 31.Ne5 (better 31.Nb2 Qc2 32.Nc2+=) 31...Qc2–/+ 32.Nc2 Nc3 33.Nd3 (33.Nd4 Na4 34.Nb3 b6–/+) 33...Na4 34.Na3 Nc3 35.Kf1 (35.Ne5!?–/+) 35...Bd7–+ 36.b6 Nb5 (36...Na4 37.Ke2–+) 37.Nc2 Nd6 (37...Bf5!? 38.Nde1–+) 38.Nc5–/+ Bb5 39.Ke1 Nc4 40.Nb3? (better 40.Nd4 Be8 41.Nb7–/+) 40...Na3?? (better 40...Ba4!? 41.Nbd4 Bc2 42.Nc2 Nb6–+) 41.Nbd4 (better 41.Na3 a4 42.Nb5 ab3 43.Kd2+–) 41...Nc2–/+ 42.Nc2 Bc4 43.Na3 (better 43.g3!?–/+) 43...a4 (43...Kf8!?–+) 44.Kd2 (44.Kd2 Bf1 45.h4 Bg2 46.Nb5–/+). BeepBeepImAJeep (2650) – soldier89_kn (2165), lichess.org, 2015.

5.a4 g6 (5...e5 6.d4=+) 6.b5 Bg7 7.Nf3 0–0 8.Be2 e5 9.0–0 Re8 10.d4 h5 (10...Qe7 11.a5+=) 11.de5+= de5 12.Nc3 (12.Ne5 Ne5 13.Qd8 Rd8 14.Be5 Bf5+–) 12...e4+= 13.Nd4 Ne5 14.bc6 bc6 15.c5 Nfg4 (15...Bg4 16.Qc2=) 16.h3 Re7?? (better 16...Nf6+=) 17.Ne4 (17.hg4 Rb7 18.Rb1 Bg4 19.Ne4 Nc4+–) 17...Nf6? (17...Rb8 18.Ba3 Nc4 19.Nc6+– (19.Bg4?! Bg4 20.Qd3 Bf5 21.Qc4 Be4+=; 19.Bc4?! Bd4 20.hg4 Re4+–; worse 19.hg4 Re4 20.Nc6 Qd1 21.Rad1 Ra8 22.Rd8 Kh7+–)) 18.Nd6 (18.Nf6 Bf6 19.f4 Ng4 20.Nc6 Qd1 21.Ne7 Be7 22.Rfd1 Ne3+–) 18...Be6? (18...Qc7 19.Rb1+–) 19.Ne6 (19.f4 Nfd7 20.fe5 Ne5 21.Ne6 Re6 22.Be5 Be5 23.Bc4 Bd6 24.Be6 Bc5 25.Rf7 Qd1 26.Rd1+–) 19...Re6 20.Qb3 (20.f4 Ned7 21.Bc4 Nc5 22.Be6 Ne6+–) 20...Rb8 21.Qa2 (21.Qc2 Ne8 22.Ba3 Nd6 23.cd6 a5+–) 21...Nd5 (21...Ne4 22.Ba3 Nc3 23.Qd2+–) 22.Be5 (better 22.Rab1!?+–) 22...Be5+= 23.Rad1 (23.Bc4 Ba1 24.Ra1 Qg5+=) 23...Bd6 (23...Nc3!? 24.Qd2 Nd1 25.Rd1 Rb2=+) 24.cd6+= Qd6 (24...Nc3 25.Qd2 Nd1 26.Rd1+=) 25.Bc4 Rd8 26.Rd4 Qe7 27.Rfd1 Red6 28.Qa3 Qd7?? (better 28...R8d7+–) 29.e4+– c5 (29...Qe6 30.Qc5 Qf6 31.ed5+– (31.Bd5?! cd5 32.Qa7 Ra6+–)) 1–0. BeepBeepImAJeep (2575) – Luckyriver (2350), lichess.org, 2017.

5.Nf3 g6 6.d4 Bg7 7.Be2 0–0 8.0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d6 7.0–0 Nbd7 8.d4).

3.e3 e5

(--> 1.b4 e5 2.Bb2 d6 3.e3 c6).

4.c4 Be6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Be6 4.e3 c6).

4.c4 Be6 5.Nf3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.Nf3 c6).

4.c4 Be7 5.Nf3 Nf6 6.Be2 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 0–0 6.Be2 c6).

4.c4 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 c6).

3.e3 Nf6

4.a4 b6 5.c4 (5.Nf3 g6+=) 5...e5 (5...Na6 6.b5 Nb4 7.bc6=) 6.Nc3 Be7 7.Be2 (7.Nf3 0–0=) 7...Nbd7 (7...0–0 8.Qb1=) 8.Nf3+= Bb7 9.0–0 (9.Qc2 0–0=) 9...0–0 10.h3 (10.Qc2 c5 11.b5 Re8+=) 10...d5 (10...e4 11.Nd4=) 11.cd5+= Bb4 (11...cd5 12.Qb3+=) 12.dc6 Bc6 13.Qb3 (13.d4 Qe7+=) 13...Bd6 (13...Bc3 14.Bc3 Nc5 15.Qa2 Bf3 16.Bf3+=) 14.d3 (14.d4 Qe7+=) 14...e4 (14...Nc5!? 15.Qa2 Rc8=) 15.de4 Nc5 16.Qa2 (16.Qc4 Rc8+= (worse 16...Nfe4 17.Ne4 Be4 18.Rfd1+–)) 16...Nfe4 17.Ne4 (better 17.Rfd1+=) 17...Bd5? (better 17...Be4 18.Rfd1 Qe7=) 18.Qd5+– Bh2 19.Nh2 Qd5 20.Nc5 bc5 (20...Qd2 21.Nd7 Qd7 22.Rfd1+–) 21.Bf3 Qb3 22.Ba8 Ra8 23.Be5 f6 24.Rfb1 (24.Bg3 c4 25.Nf3 Rc8+–) 24...Qd5 (24...Qd3 25.Rd1 Qb3 26.Bg3+–) 25.Bc3 1–0. Kislov,Leonid – Bereziy,Petr, Half Omsk, 2009.

4.a4 e6 5.b5 c5 6.c4 (6.Be2 e5=) 6...Bd7 (6...Be7 7.Be2=) 7.Nf3 a6 8.Be2 ab5 (8...Be7 9.0–0=) 9.ab5+= Ra1 10.Ba1 Be7 11.0–0 0–0 12.Qc2 e5 13.d4 g6? (better 13...cd4!? 14.ed4 e4+=) 14.de5+– de5 15.e4 Qc7 (15...Bd6 16.Be5 Be5 17.Ne5+–) 16.Be5 Qb6 17.Nc3 Be6 (17...Bg4 18.Rd1+–) 18.Nd5 Bd5 19.ed5 (19.cd5 Nbd7+–) 19...Nh5 (19...Nbd7 20.Bc3+–) 20.Qb2 (20.Nd2 Nd7 21.f4 Ng7+–) 20...Bf6 21.Bf6 Nf6 22.Ra1 Nbd7 23.Bd3 Qd6 24.Ra7 Qb6 (24...b6 25.Qd2+–) 25.Qa1 Ng4 26.h3 Nh6 (26...Nge5 27.Ne5 Ne5 28.Be2+– (28.Qe5?! Qa7 29.Qe3 Qb6=)) 27.Ng5 (27.Qa5 Qa5 28.Ra5 Rd8+–) 27...f6? (better 27...Re8+–) 28.Ne6 Re8 (28...Rb8 29.Ra8 Qd6 30.Qa7 Ra8 31.Qa8 Nf8 32.b6+–) 29.Ra8 Ra8 (29...Kf7 30.Re8 Ke8 31.Qa8 Ke7 32.Qh8+–) 30.Qa8 (30.Qa8 Kf7 31.Qh8+–) 1–0. GuestWLZS – GuestFRNL, freechess.org, 2019.

4.a4 g6 5.c4 Bg7 6.Nf3 0–0 7.Be2 a5 8.b5 c5 9.0–0 b6 10.h3 Bb7 11.d4 Nbd7 (11...cd4 12.ed4 Nbd7 13.Re1=) 12.Nc3 (12.d5 Qe8=) 12...cd4 13.Nd4 Rc8 14.Bf3 (14.Rc1 Rc7=+) 14...Bf3=+ 15.Qf3 Ne5 16.Qe2 Nc4 17.Nc6 Rc6 18.bc6 Nb2 19.Qb2 (19.Rab1 Qa8 A) worse 20.Qb2 Ne4–/+ (20...Qc6?! 21.Rfc1=); B) 20.Rfc1=) 19...Qc7 (19...Ne4 20.Ra3=+) 20.Nb5 (20.Qb5 Rc8 21.Rac1 Qc6+–) 20...Qc6= 21.Rac1 Qe4 22.Qc2 Qh4 23.Qc7 (23.Qc4 Qe4=) 23...Nd5 (better 23...Qa4!? 24.Qb6 Nd7=) 24.Qc6+= Nb4 25.Qb6 Nd3 26.Rc7 (26.Qa5?! Nc1 27.Rc1 Qe4=) 26...Qg5 (26...Nb2!?+–) 27.Qa5+– Ne5? (better 27...Bf6+–) 28.f4 Qh6 (28...Qg3 29.fe5 Qe3 30.Kh1 Be5 31.Qe1 Qe1 32.Re1+–) 29.fe5 (better 29.Qd2!? Qh4+–) 29...Qe3 30.Kh1 Be5 31.Rc3 (better 31.Qe1 Qe1 32.Re1+–) 31...Bc3 32.Qc3 Qc3 33.Nc3 e6 34.Ra1 d5 35.Kg1 Rc8 36.Nb5 Kf8? (better 36...Rc5+–) 37.a5+– Ke7 38.a6 Kd7 (38...Ra8 39.a7 Kd7+–) 39.Kf2 (better 39.a7+–) 39...Ra8+– 40.Ke3 (40.Nd4!?+–) 40...Kc6+= 41.Nd4 Kd6 (better 41...Kb6!?+=) 42.a7+– e5 43.Nb5 (better 43.Ra6!? Kc5 44.Nf3+–) 43...Kc6+– 44.Rb1 f5 45.g4 d4 46.Kd3 (better 46.Kf2+=) 46...h6?? (46...Kc5 47.gf5 gf5 48.Nd4 ed4 49.Rb7=) 47.Rb2?? (47.Kc4 d3 48.Kd3 Kc5+–) 47...f4?? (better 47...Kc5=) 48.Ke4+– Kc5 49.Ke5 d3 50.Nd6 (better 50.Kf4 d2 51.Nc3 Kd4+–) 50...d2?? (better 50...Ra7 51.Ne4 Kc4+–) 51.Ne4 Kc4 52.Rd2 (52.Nd2!? Kc5 53.Rb7 g5+–) 52...Ra7 53.Kf4 g5 54.Ng5 hg5 55.Kg5 Ra5 56.Kh6 Kc3 57.Rd8 Ra1 58.h4 Rh1 (58...Ra4 59.Kh5 Ra7+–) 59.h5 Kc4 60.g5 Kc5 61.g6 Kc6 62.g7 Kc7 63.Rd2 (63.g8Q Re1 64.Qd5 Re6 65.Kg7 Rc6 66.Rd7 Kb6 67.Qd4 Ka5 68.Ra7 Ra6 69.Rb7 Rg6 70.hg6 Ka6 71.Qb6) 63...Rg1 64.Kh7 Rg7 65.Kg7 Kc6 66.h6 Kc5 (66...Kb7 67.h7 Kc8 68.h8Q Kb7 69.Rd7 Kb6 70.Qb8 Kc5 71.Qc8 Kb4 72.Rb7 Ka4 73.Qa8) 67.h7 Kc4 (67...Kb6 68.h8Q Kc5 69.Qc8 Kb4 70.Rb2 Ka3 71.Qc3 Ka4 72.Qb4) 68.h8Q Kc3 (68...Kc5 69.Qc8 Kb4 70.Rb2 Ka3 71.Qc3 Ka4 72.Qb4) 69.Qd8 Kc4 70.Rd7 Kb5 71.Rc7 Kb6 (71...Ka4 72.Rb7 Ka3 73.Qa5) 72.Qb8 Ka5 73.Ra7 1–0. RichardSommer (2180) – Thokue (2165), lichess.org, 2020.

4.c4 a5 5.b5 e6 (5...Nbd7 6.Nc3=) 6.Nc3 (6.Nf3 e5=) 6...Nbd7 (6...Be7 7.Be2=) 7.Nf3 Be7 8.Be2 0–0 9.0–0 Qc7 10.Qc2 Rd8 (10...Nb6 11.Rfc1+=) 11.d4 Nb6 12.e4 (12.Bd3 c5 13.Ne4 Ne4 14.Be4 f5+=) 12...a4 (12...c5 13.d5+=) 13.bc6 (13.Rad1 h6+=) 13...bc6 14.Ba3 (14.Rab1 a3 15.Ba1 Ba6=) 14...Ba6 (14...c5 15.Nb5 Qb8 16.e5 de5 17.dc5+– (17.Ne5?! Bb7+=)) 15.e5+/– de5 16.Be7 Qe7 17.de5 Nfd7 18.Na4 Na4 19.Qa4 Qc5 20.Rfd1 Bb5 21.Qa8 Ra8 22.cb5 Ne5 23.Rac1 Nf3 24.Bf3 Qb6 25.a4! Rc8 26.Rd6 Kf8 27.g3 h5 28.Rdc6 Rc6 29.Rc6 Qb7 30.b6 g5 31.a5 e5 32.Bd5 e4 33.Rc5 Qe7 34.b7 Qc5 35.b8Q Ke7 36.Qe5 Kf8 37.Qf5 Qc1 38.Kg2 Qc7 1–0. Koslowski,Volker (1985) – Fiedler,Peter, DESC, 2003.

4.c4 Nbd7 5.Nf3 e5 6.Qc2 Be7 7.a3 0–0 8.Be2 Re8 9.0–0 Bf8 10.Nc3 Qc7 11.Ne4 a6 12.Ng3 g6 13.h4 (13.d4 Bg7+=) 13...e4 14.Ng5 c5 (14...Qd8!?+=) 15.N5e4+/– cb4?? (15...Bg7 16.d3+/–) 16.ab4 (better is 16.Nf6 Nf6 17.Bf6 ba3 18.Qd3+–) 16...Ne4 17.Ne4 d5? 18.Ng5 Ne5 19.h5 Bf5+= 20.e4 Be4 21.Ne4 de4 22.Qe4 Bb4 23.hg6 Ng6 24.Qd4+= Re5 25.Bf3 Rd8 26.Bd5 Qe7 27.f4 Bc5+= 28.fe5 Bd4 29.Bd4 Ne5 30.Bc3 Kf8 31.Rae1 f6?? 32.Re5+– Qc5 33.d4 Qa3 34.Rf6 Kg7 35.Rf7 Kg6 36.Re6 Kg5 37.Bd2 Kh4 38.Rf4 Kh5 39.Bf3 Kg5 40.Rf7 Kh4 41.Rh6 (41.Rh6 Kg3 42.Bf4#; 41.Rh7 Kg3 42.Rh3#) 1–0. Didicher,Dietmar (1650) – Ortiz Rodriguez,Jose, Frankfurt–ch, 2005.

4.c4 e5 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 c6).

4.c4 g5 5.a4 Bg7 6.Nc3 h5 7.b5 g4 8.Nge2 Nbd7 9.Nf4 Nf8 (9...e5 10.Nfe2=+) 10.Be2 Ne6 (10...e5 11.Nd3=) 11.Ne6+= Be6 12.d4 Qc7 13.Qd2 h4 14.Rc1 g3 15.hg3 hg3 16.Rh8 Bh8 17.fg3 Bg7 (17...d5 18.Bf3=) 18.Bf3 (18.d5 Bg4+–) 18...d5 19.Kf2 (19.cd5!? cd5 20.Ne4=) 19...dc4=+ 20.bc6 bc6 21.e4 (21.Nb5 Qb6 22.Nc3 Rb8=+) 21...Kf8 (21...Rb8!?=+) 22.Qg5 Rb8 23.Ba1 Rb3 24.d5 (24.e5 Nd5 25.Ne4 Nb4+=) 24...cd5 25.ed5 Qc5 26.Kf1 Nd5?? (better 26...Ne8=) 27.Qg7!+– (27.Nd5?! Ba1 28.Ra1 Rf3 29.gf3 Qd5+=) 27...Kg7 Decoy theme: g7 28.Ne4 A double attack 28...Kf8 The mate threat is Rxf3 29.Nc5 Rf3 (29...Ra3+–) 30.gf3 Ne3 (30...Bf5 31.Ke2+–) 31.Ke2 Nd5 32.Ne6 fe6 33.Rc4 Kf7 (33...Nb6 34.Rh4 a6 35.a5+–) 34.Bd4 a6 35.Rc6 Nb4 36.Rb6 Nc2 37.Bf2 e5 38.Kd3 Na3 (38...Nd4 39.Bd4 ed4 40.Ra6+–) 39.Kc3 (39.Ra6 Nb1+–) 39...a5 (39...Nb5 40.ab5 ab5 41.Rb5+–) 40.Rb3 Nb1 41.Rb1 e6 42.Re1 (42.Re1 Kf6 43.Bb6+–) 1–0. BeepBeepImAJeep (2615) – LEXusss (1980), lichess.org, 2016.

4.c4 g6 5.a4 Bg7 6.b5 Nh5 7.Nc3 cb5 8.cb5 Nd7 9.Be2 0–0 10.Bh5 gh5 11.Qh5 Nf6 (11...Nc5!? 12.Ke2 e5+=) 12.Qh4 Bf5 13.Nf3 Bg6 14.0–0 e5 (14...Rc8 15.Rfc1+–) 15.Rfd1 (15.d4 Nd7+–) 15...Nd7 16.Qd8 White fights for the Initiative 16...Rad8 17.d4 e4 (17...Nb6 18.Rac1+–) 18.Nd2 d5? (18...Rfe8 19.Rdc1+–) 19.Nb3 (better 19.Nd5 Nf6 20.Ne7 Kh8 21.Rac1+–) 19...Nf6+– 20.Nc5 b6 21.Na6 Rc8 22.Nb4 a5? (better 22...Rfd8+–) 23.Nbd5+– Nd5 (23...Rb8 24.Rac1+–) 24.Nd5 Rc2 25.Ne7 (25.Rab1 Rb8 26.Rdc1 Rd2+–) 25...Kh8 26.Ng6 (better 26.Ba3 Rd8 27.Rdc1+– (27.Ng6?! hg6 28.Rdc1 Rdc8+–)) 26...fg6–/+ 27.Ba3 Rff2 28.Bd6 Rg2 29.Kh1 Bf8 (29...Bh6 30.Be5 Kg8 31.Rac1–/+) 30.Bg3 (30.Bc7 Bh6 31.Rac1 Ra2=) 30...h5 (30...Bh6 31.Rac1=+) 31.Rg1 (31.Bf4 Kg7=) 31...Rg1=+ 32.Kg1 Bh6 33.Re1 Rc4 34.Bf2 (better 34.d5!?=+) 34...Ra4–+ 35.Rc1 Rb4 36.Rc6 Rb5 37.Rg6 Rb1 (better 37...Rg5 38.Rg5 Bg5–+) 38.Kg2=+ Bg7 39.Rc6? (39.Re6 a4 40.Re4 b5=+) 39...Rb2 (better 39...a4!?–+) 40.Rc8 Kh7 41.Ra8? (41.Re8 a4 42.Re4 b5–/+) 41...Bh6 (better 41...Bd4 42.ed4 e3–+) 42.Kg3?? (42.Kf1 Bg5–/+) 42...Kg6 (better 42...h4 43.Kh4 Rf2–+) 43.h4 Bg7 44.Ra6 a4 (better 44...Bf8–+) 45.Ra4=+ Rb5 46.Ra6 Rf5 (better 46...Bf8=+) 47.Rb6+– Bf6 48.Rb5?? (48.Rb5 Rb5 49.Kh3–+; better 48.Re6 Rf3 49.Kg2+–) 1–0. BeepBeepImAJeep (2775) – hatemsaid (1680), lichess.org, 2017.

4.c4 g6 5.Nf3 Bg7 6.b5 0–0 7.a4 a5 8.Be2 e5 9.0–0 Ng4 10.d4 e4 11.Nfd2 Nf6 12.Nc3 d5 13.cd5 cd5 14.Ba3 Re8 15.Rc1 h5 (15...Be6 16.Qe1+=) 16.Re1 Bg4 17.Nf1 (17.Bg4 Ng4 18.Qe2 Qc7+=) 17...Nbd7 (17...Be2 18.Re2 Qb6 19.Qb3+–) 18.h3 (18.Bg4 hg4 19.Qb3 Nf8+=) 18...Be2 Black gets the initiative 19.Ne2 Nb6 20.Bc5 Nc4 21.Nf4 (better 21.Rc3!?=) 21...b6–/+ 22.Rc4 (22.Qb3!?–/+) 22...dc4–+ 23.Ba3 Rc8 24.Qc2 Nd5 25.Nd5 Qd5 26.Qc3 f5 27.g3 h4 28.Nd2 hg3 29.fg3 Kf7 30.Rf1 Ke6 31.Bc1 (31.Rc1 Rc7–+) 31...Rh8 32.Kg2 Bf8 33.Nb1 Bb4 34.Qc2 c3 35.Ba3 Qc4 36.Rf2 (36.Rd1 Qc7–+) 36...Qd3 37.h4 (37.Qa2 Kd6 38.Qf7 Rhe8 (38...Qb1?! 39.Qg6 Kc7 40.Qc6 Kd8 41.Qf6 Kc7 42.Qc6 Kb8 43.Qb6 Ka8 44.Qa6 Kb8 45.Qb6 Ka8 46.Qa6 Kb8 47.Qb6=) 39.Qg6 Re6 40.Qf5 Qe3–+ (40...Qb1?! 41.d5 Ree8 42.Qf6 Kd7 43.Qg7 Kd8 44.Qf6 Kd7 45.Qg7 Kd8 46.Qf6 Kd7=)) 37...Kd5 (37...Qe3!? 38.Qb3 Kf6 39.d5–+) 38.Qa2 Qc4 39.Bb4 (39.Qc2–+) 39...ab4 40.Qc2 b3 41.Qc1 c2 42.Nd2 Qc3 (42...Qa4 43.Nb3 Qb3 44.Re2–+) 43.Nb3 Qb3 44.g4 (44.Re2–+) 44...Rh4 45.gf5 Rg4 46.Kf1 Qd3 47.Re2 gf5 (47...Qd1 48.Kf2 Rh8 49.Qd1 cd1Q 50.fg6 Rh2) 48.Qb2 (48.Ke1 Qd1! 49.Qd1 Rg1 50.Kf2 cd1Q 51.a5 Qf1) 48...c1Q (48...Qd1 49.Re1 Qf3) 49.Qc1 Rc1 50.Kf2 Rc2 (50...Qd1 51.a5 Qf1) 51.Rc2 Qc2 52.Kf1 Rg2 53.Ke1 (53.a5 Qe2) 53…Qe2 0–1. BeepBeepImAJeep (2675) – skopje123 (2560), lichess.org, 2015.

4.c4 g6 5.Nf3 Bg7 6.Qc2 e5 7.Be2 Nbd7 (7...Bf5 8.d3=) 8.0–0 0–0 9.d4 e4 10.Nfd2 d5 11.Nc3 Nb6 12.c5 Nbd7 13.a4 White plans b5 13...a6 14.b5 Nb8 15.Qb3 Be6 (15...Qe7 16.Qd1+=) 16.bc6 bc6 17.Qb7 Qd7?? (better 17...Nbd7 18.Qc6 Qb8+=) 18.Qa8+– 1–0. DEFFM – GuestMRQY, freechess.org, 2018.

4.d4 d5 5.c4=.

4.d4 Nbd7 5.a3 (5.Nf3 e5=) 5...e5 6.de5 de5 7.Nd2 Be7 (7...c5 8.bc5 Bc5 9.Ngf3=) 8.Ngf3 Qc7 9.c4 (9.Nc4 e4 10.Nd4 b5=) 9...0–0 10.Bd3 Rd8 11.Qc2 c5 12.b5 Bd6 (12...a6 13.0–0=) 13.0–0+= Nb6 14.Rfd1 Bg4 (14...a6 15.Ng5 h6 16.Nge4 Ne4 17.Ne4=) 15.h3 Bh5 16.Ne4 Ne4 17.Be4 Kh8 (17...g6 18.g4 f5 19.gh5 (19.gf5 gf5 20.Kh1 fe4 21.Qe4 Qd7 22.Rg1 Kf8–+) 19...fe4 20.Qe4 gh5 21.Kh1+–) 18.a4 (18.Rd2 f6+=) 18...Nd7= 19.Bb7 (< 19.Bh7 Bf3 20.gf3 g6 21.Bg6 Rg8–/+) 19...Qb7 20.Rd6 Bf3 21.gf3 Nf8 (21...Qf3 22.Rad1 Qh3 23.Qe4+/–) 22.Rd8 (22.Qd3 Qe7 23.Rd1 Qg5 24.Kf1 Rd6 25.Qd6 Qh5+/–) 22...Rd8 23.Rd1 (23.Qe4 Qe4 24.fe4 f6+/–) 23...Re8 (23...Rd7 24.Rd7 Nd7 25.Qe4 Qe4 26.fe4+–) 24.Qe4 (24...Qe7 25.Qc6+/–) 1–0. Luzuriaga,Norberto Horacio (1700) – Rosner,Dirk (1700), TT–01 TSC, 2002.

4.Be2 g6 5.Nf3 Bg7 6.0–0 0–0 7.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d6 7.0–0).

4.Nf3 Qb6 5.a3 a5 6.c3 (6.Bd4 Qc7=) 6...ab4 7.ab4 g5?? (better 7...Ra1 8.Ba1 e5=) 8.Ra8+– Qc7 9.Ng5 Na6 (9...Rg8 10.h4+–) 10.Ba6 (better 10.Qb3 d5 11.c4 h6+–) 10...ba6 11.Qe2 (better 11.Qb3!? d5 12.c4 Qb7 13.cd5 Qa8+–) 11...Qb7 12.Ra6! Qa6 13.Qa6 Ba6 14.Nf3 Rg8 15.Ng1?? (better 15.Rg1+–) 15...Rg2=+ 16.Na3 Ne4 17.Nh3 Bc8 18.Nf4 (18.d3 Bh3 19.de4 Bh6–/+) 18...Rf2–/+ 19.Rg1? (better 19.Bc1 Bg7 20.b5 cb5 21.Nb5–/+) 19...Rd2–+ 20.Bc1 (20.Rg2 Rg2 21.Ng2 Bg7–+) 20...Ra2 (20...Rh2 21.c4–+) 21.Nc4 (21.Ne2 d5–+) 21...Nc3 (better 21...Rc2 22.Ne2 Nc3–+) 22.Nd3 (22.Bb2 Ne4 23.Rg2 e5–+) 22...Ba6 (better 22...Re2 23.Kf1 Bh3 24.Rg2 Bg2 25.Kg1 Be4–+) 23.Ncb2 Bd3 24.Nd3 Re2 25.Kf1 Rh2 26.Bb2 (26.Nf2 f5–+) 26...Nd1 (26...Rd2 27.Bc3 Rd3 28.Bd4–+) 27.Bd4 (27.Bc1 e5 28.Rg8 e4–+) 27...h5 (better 27...e5 28.Bb6–+) 28.Nf4 (28.Ke1 e5 29.Be5 de5 30.Kd1–+) 28...e5 29.Ne2 (29.Ke1 Nf2 30.Rg2 Ng4 (30...ed4?! 31.Rh2 de3 32.Rh5–/+; 30...ef4?! 31.Rh2 fe3 32.Ke2–+) 31.Rh2 Nh2 (31...ed4?! 32.Rh5 Ne3 33.b5 cb5 34.Rb5–/+; 31...ef4?! 32.Rh5 Ne3 33.Ke2=+) 32.Be5 de5 33.Nh5 f5–+) 29...ed4 30.Nd4 (30.ed4 Ne3 31.Ke1 d5–+) 30...Ne3 31.Ke1 Ng4 (31...Be7 32.Nf3 Rb2 33.Rg8 Kd7 34.Rg3–+) 32.Nc6 (32.Rg3 c5 33.bc5 dc5–+) 32...d5 (32...Rc2 33.Rg4 hg4 34.Nd4–+) 33.b5 (33.Rg3 Rb2 34.Rh3 Bd6–+) 33...Rb2 (better 33...Bd6 34.Kd1 Ne3 35.Ke1 f6–+) 34.Kf1 (34.Rg3 Bc5 35.Rd3 Rb5–+) 34...Rb5 (34...Nh2 35.Ke1 Nf3 36.Kf1 Rb1 37.Kg2 Ng1 38.Nd4–+) 35.Nd4 (35.Ke2 Kd7 36.Rg4 Rb2 37.Ke1 hg4 38.Ne5 Ke6–+) 35...Rb1 36.Kg2 Rg1 37.Kg1 Bc5 (37...Bc5 38.Kg2 Bd4–+) 0–1. Akrapovik (1610) – Alexito101 (1635), lichess.org, 2020.

4.Nf3 e5 5.a3 Be7 6.c4 (6.Be2 e4 7.Nd4 c5=) 6...0–0=+ 7.Be2 (7.Nc3 a5=+) 7...e4 8.Nd4 c5 9.Nb3 Nc6 10.b5 Ne5 11.Nc5 (11.Qc2 Qc7=) 11...Nc4=+ 12.Bc4 dc5 13.Nc3 Bf5 (13...Be6 14.Be6 fe6 15.Qb3=) 14.0–0 (14.f3 Qd7=) 14...Be6 (14...Qd7 15.f3=) 15.Be6 (15.d3 Bc4 16.dc4 Bd6=) 15...fe6=+ 16.Qb3 Qd6 (16...Kf7 17.Qc2 Qd3 18.Rac1=+) 17.Qc4 Attacking the isolated pawn on e4 17...Qe5 18.f3 Rad8 19.f4 (19.Ne4 Qb2 20.Qe6 Rf7=) 19...Qf5 20.Rad1 Rd3 21.Qa4 a5 (21...Ra8 22.Ne2=) 22.Qa5+= Bd8 (22...Nd5 23.Qa7 Nc3 24.dc3+=) 23.Qa4 Be7 24.Ne2 Rfd8 The backward pawn on d2 becomes a target 25.Ng3 White is in command 25...Qd5 Increases the pressure on the backward pawn 26.Bf6 Bf6 27.Qe4 (27.Ne4 Bb2+–) 27...b6 (27...Ra3 28.f5 e5 29.Qd5 Rd5 30.Ne4+–) 28.f5+– Be5 (28...ef5 29.Rf5 Qe4 30.Ne4+–) 29.fe6 Qe6 30.a4 h6 (30...Rd2?? 31.Rd2 Re8 32.Qc6+–) 31.Qf5 Qf5 32.Nf5 Kh7 (32...R8d7 33.a5 ba5 34.Rc1+–) 33.Ne7 Rd2 34.Rd2 Rd2 35.Nc8 Bc7 36.g3 Rd7 (36...Bd8 37.Rf2 Rd3 38.e4+–) 37.Kg2 Kg6 38.e4 Rf7 39.Rc1 (39.Rd1 h5+–) 39...Kf6 40.a5 Ke5 41.ab6 Bb8 42.Rc4 Rb7 43.Kf3 Bd6 44.Rc2 (44.Nd6?! Kd6 45.Rc2 Rb6 46.Rd2 Ke6+–) 44...Rb8 45.Nd6 Kd6 46.Rd2 Ke7 47.Rd5 c4 48.Ke3 c3 (48...Rb6 49.Kd4+–) 49.Kd3 c2 50.Kc2 Rb6 51.Kd3 (51.Kc3 g5+–) 51...Ke6 (51...Rb7 52.Kd4+–) 52.Kd4 Rb7 53.Kc5 (53.e5 Ke7+–) 53...Rc7 54.Kb6 (54.Kb4!? Rc2+–) 54...Rc4 55.Rc5 Ra4 (55...Re4 56.Kc7 Kf6 57.b6 Re7 58.Kb8+–) 56.Kc6 Ra8 57.b6 Rc8 58.Kb5 (58.Kb5 Rb8 59.Ka6 Ra8 60.Kb7+–) 1–0. Milde,Lars (1725) – Rosner,Dirk (1700), TT–01.03, 2001.

4.Nf3 e5 5.Be2 Bg4 6.c4 Nbd7 7.Nc3 a6 (7...d5 8.cd5 cd5 9.a3=) 8.Qc2 (8.h3 Bh5=) 8...Rc8 (8...d5 9.c5=+) 9.0–0= g6 (9...d5!? 10.c5 e4=) 10.h3 Bf3 11.Bf3 Bg7 12.Qd3 Qe7 13.g4 (13.Rfb1 0–0=) 13...0–0 (13...Nb6 14.e4=) 14.g5 (14.Bg2!?=) 14...Ne8=+ 15.Ne4 f5 16.gf6 Ndf6 17.Ng3 d5 18.cd5 cd5 (18...Rd8 19.e4=+) 19.Bd5= Nd5 20.Qd5 Kh8 21.Ne4 Qh4 (21...b6!?=) 22.Be5+– Qh3 23.Rac1 Rc1 24.Bg7 Ng7 25.Rc1 Qg4 26.Kh2 h6 (26...Qh4 27.Kg2+=) 27.Qb7+– Qh4 (27...Nf5 28.Qd5 Qh5 29.Kg1 Qg4 30.Ng3+–) 28.Kg2+– Qg4 29.Kh1 Qf3 30.Kg1 Qg4 (30...Nf5 31.Qd5 Nh4 32.Qd4 Kg8 33.Qc4 Rf7+=) 31.Ng3+– Qf3?? (better 31...Qe6+–) 32.Qf3 Rf3 33.Rc6 g5 (33...Ne8 34.Ra6 Kg7 35.b5+–) 34.Rh6 Kg8 35.Ra6 Rf7 36.b5 Rb7 37.a4 Ne8 38.Ne4 Nc7 39.Rg6 Kf7 40.Rg5 Ne6 41.Rf5 Kg8 (41...Ke7 42.Rh5 Ng7 43.Rh7+–) 42.a5 Kh7 (42...Ng7 43.Re5+–) 43.a6 Rb6 (43...Rg7 44.Kh2 Nc7+–) 44.a7 Nc7 45.Rf7 Kg6 46.Rc7 (46.Rc7 Rb5 47.a8Q Rg5 48.Ng5 Kf5 49.Qd5 Kg4 50.f3 Kh4 51.Rh7 Kg3 52.Qd6) 1–0. Guestcello – Hpipsub, internet, 2019.

4.Nf3 Bg4 5.Be2 e5 6.c4 e4 7.Nd4 Be2 8.Qe2 c5 9.Nc2 d5 (9...Nc6 10.a3=) 10.Bf6+= Qf6 11.Nc3 Bd6 (11...Qg6!? 12.0–0 cb4 13.Nd5 Bd6+=) 12.cd5+/– Be5 (12...Qg6!? 13.Qc4 Be5+/–) 13.Ne4+– Qb6 14.d4 cd4 15.ed4 Bd4 16.0–0–0 (16.Nd4?! Qd4 17.Nc5 Kf8+–) 16...Be5 17.Nc5 a5 (17...0–0 18.Qe5 a5+–) 18.Qe5 Kf8 (18...Kd8 19.Qg7 Re8 20.Rhe1+–) 19.Rde1 g6 (19...Qd8 20.Nd4 Ra6 21.Qb8 Qb8 22.Nd7 Kg8 23.Nb8 f6 24.Na6 Kf7+–) 20.Qh8 1–0. Janek – Felix, internet, 2016.

4.Nf3 Bg4 5.Be2 h6 (5...e5 6.0–0=) 6.Nc3 Nbd7 7.0–0 g5 (7...e5 8.e4=) 8.h3 (8.b5 e5+=) 8...Bf5 9.b5 (9.d3 Bg7+=) 9...c5 (9...e5 10.Rb1=) 10.e4+= Bg6 11.d4 (11.d3 Bg7+=) 11...cd4= 12.Qd4 Bg7 13.Qe3 g4 14.Nh4 gh3 15.Qh3 (15.Ng6 hg2 16.Nh8 gf1R 17.Kf1 Qa5 (17...Bh8?? 18.Qh6 Nf8 19.Qh8+–) 18.Nf7 Kf7=) 15...Bh7 16.Nf5 Bf5 17.ef5 h5 18.Rfe1 Kf8 (18...Ne5!?=) 19.Bf3 Rc8 (19...Qc7!?+=) 20.Bb7+– Rc4 (20...Rc5 21.Rad1+–) 21.Qd3 Rg4 (21...Rc7 22.Bc6+–) 22.Qe3 (22.Bf3 Rg5 23.Qe3 Rf5 24.Qa7 h4+–) 22...Nc5 (22...Nb6 23.Nd1+–) 23.Bc6 Bh6 24.Qe2 Rhg8 25.Bf3 Bf4? (better 25...Rb4 26.Ba3 Rd4+–) 26.Bg4 hg4 (26...Rg4 27.Rad1+–) 27.Qc4 Bd2 28.Re2 Bh6 (28...Bg5 29.Rae1+–) 29.Rae1 g3 30.Re7 gf2 31.Kf2 Qb6 (31...Qe7 32.Re7 Ke7 33.Nd5 Nd5 34.Qd5 Bg7 35.Bg7 Rg7 36.f6 Kf6 37.Qd4 Kg6 38.Qd6 Ne6+–) 32.Rf7 (32.Qf7) 1–0. Pierre – GuestImper, internet, 2020.

4.Nf3 g6 5.c4 Bg4 6.Be2 Bg7 7.0–0 0–0 8.d3 (8.d4 Qb6 9.Qb3 Na6=) 8...Nbd7 (8...Qb6 9.Bc3=) 9.Nbd2 e5 10.a4 Re8 11.h3 Bf3 12.Bf3 (worse 12.gf3 Qe7=+) 12...Rc8 13.Qc2 b5? (better 13...Qe7+=) 14.ab5+– cb5 15.Ra7 bc4 16.dc4 Qb6 (16...d5 17.Rfa1+–) 17.Rb7 Qd8 18.Ra1 Rb8 19.Raa7 Rb7 20.Rb7 (20.Bb7?! Qb6 21.Qa4 Rb8+–) 20...e4 (better 20...Qc8 21.Rb5 Qc7+–) 21.Ne4 Ne4 22.Bg7 (22.Be4?! Bb2 23.Bc6 Qc8 24.Bd7 Qb7 25.Be8 Qb4+–) 22...Kg7 23.Be4 Nb6 (23...Ne5 24.Qd1+–) 24.Qc3 Kg8 25.Qd4 Nc8 26.Bd5 Re7 (26...Rf8 27.b5+–) 27.Qf6 h6 (27...Qf8 28.Rb8 Re8+–) 28.Bf7 Rf7 (28...Kf8 29.Bd5 Ke8 30.Qh8) 29.Qf7 (29.Qf7 Kh8 30.Qg7) 1–0. Adlai – Toq2364, internet, 2019.

4.Nf3 g6 5.c4 Bg7 6.d4 0–0 7.Be2 Nbd7 8.0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d6 7.0–0 Nbd7 8.d4).

4.Nf3 g6 5.c4 Bg7 6.d4 Bg4 7.Be2 0–0 8.0–0 (8.Nc3 Qb6 9.a3 a5=) 8...Nbd7 (8...Qb6 9.Qb3=) 9.Nbd2 (9.h3 Bf5=) 9...Re8 (9...a5 10.b5=) 10.h3+= Bf3 11.Nf3 e5 12.de5 Ne5 13.Ne5 de5 14.Qc2 e4 15.Rfd1 Qe7 16.Rab1 a5 (16...Red8 17.Rd8 Rd8 18.Bd4=) 17.Bc3+= White plans b5 17...a4 (17...ab4 18.Bb4 c5 19.Bc3+=) 18.b5+– cb5 (better 18...c5!?+–) 19.Rb5+– Reb8 20.Bb4 White prepares c5 20...Qe6 21.Bd6 Rd8 22.c5 Ne8 (better 22...Qc8+–) 23.Bc4 Qd7 24.Qe4 a3 (24...Ra7+–) 25.Rb7 Qa4 (25...Nf6 26.Qf3 Qf5 27.Qf5 gf5 28.c6+–) 26.Rd4! Nd6 (26...Bd4 27.Bf7 Double attack (27.Bf7 Decoy)) 27.cd6 Qa5 (27...Kh8 28.Rf7 Re8+–) 28.Rf7 Kh8 29.Rg7! Kg7 (29...Kg7 30.Qe7 Mate attack) 30.Qe7 Kh8 (30...Kh6 31.Rh4 Qh5 32.Rh5 Kh5 33.Qh7 Kg5 34.f4 Kf5 35.Qe7 Rd6 36.Qe5) 31.Qf6 1–0. Pierre – Vredder, internet, 2020.

4.Bf6 ef6 5.Nf3 d5=.

3.Nf3 Qc7

4.e4 e5 5.d4 Nf6 6.de5 d5?? 7.ed5 (better 7.ef6 Bb4 8.c3+–) 7...Nd5+– 8.a3 Be6 9.Nbd2 a5 10.Ng5 (10.b5!?+–) 10...ab4+= 11.Ne6 fe6 12.a4 Bc5 13.Bd3 (13.Ne4!? Ra5 14.Qg4+=) 13...0–0= 14.Qh5?? (better 14.0–0=) 14...Bf2–+ 15.Kd1 g6 16.Bg6 hg6 (better 16...Nf4!? 17.Qg4 Ng6 (17...hg6?! 18.g3=+) 18.Qe6 Kg7–+) 17.Qg6–/+ Qg7 18.Qe6 Kh8 (better 18...Kh7 19.Qh3 Qh6 20.Qh6 Kh6–/+) 19.g3?? (19.Qh3 Kg8 20.Qe6 Kh7 21.Qh3 Qh6 22.Qh6 Kh6 23.Ne4–/+) 19...Nc3 (better 19...Qh7 20.Qd6 Ne3 21.Ke2 Qh5 22.g4 Qg4 23.Kd3 Na6 24.e6 Kh7 25.Qd7 Kg8 26.Qg7 Qg7 27.Bg7 Nc5 28.Ke2 Kg7–+) 20.Bc3=+ bc3 21.Ne4 Bd4 (better 21...Be3 22.Re1 Bh6–+) 22.Nf6?? (better 22.Qh3 Qh7 23.Qh7 Kh7 24.e6=+) 22...Be5 (better 22...Qh6 23.Qh3 Qh3–+) 23.Qh3 Qh7 (23...Qh6 24.Qh6) 24.Qh7 1–0. alessandrocarvalhaes (1890) – Syamsul_Maarif (1935), lichess.org, 2020.

4.e4 Nf6 5.Be2 Bg4 6.0–0 Nbd7 7.Re1 e5 8.d3 Be7 9.Nbd2 Bh5 10.c3 0–0 11.Qc2 Rfc8 12.d4 Bg6 13.Bd3 b5 14.Qb3 a5 15.Ng5 (15.a4 ab4 16.ab5 c5 17.Ra8 Ra8 18.de5 de5=) 15...h6 16.Ngf3 a4 17.Qc2 d5 (17...Rcb8 18.a3+=) 18.a3 (18.ed5 Bd3 19.Qd3 Nd5 20.de5 a3+–) 18...de4 19.Be4 (19.Ne4 Be4 20.Be4 ed4+=) 19...Be4 (19...Ne4 20.Ne4 Nf6 21.Nf6 Bf6 22.Qe2=+) 20.Ne4 Ne4 (20...ed4 21.cd4 Re8 22.Rac1+=) 21.Qe4+– (21.Re4?! f5 22.Re5 Ne5 23.Ne5 Rf8=) 21...Nf6 22.Qe5 Bd6 23.Qf5 Re8 24.Rad1 Nd5 25.Qd3 Nf4 26.Qf5 Ng6 (better 26...Nd5!?=) 27.h3 Rad8 28.h4 (28.c4 bc4 29.Qc2 Nf4+–) 28...Qd7 (better 28...Ne7 29.Qg4 Nd5+=) 29.Qd3 (29.Qd7 Re1 (29...Rd7?? 30.Re8 Kh7 31.c4+–) 30.Re1 Rd7+–) 29...Ne7 (29...Qg4!?=+) 30.h5 (better 30.c4+–) 30...Qf5?? (30...Qg4 31.c4 bc4 32.Qc4 Qh5 33.Qc2=) 31.Qf1?? (better 31.Re7 Qh5 32.Re8 Re8 33.c4+–) 31...Nd5 32.Nd2 (32.c4 Nf4 33.Re8 Re8=+) 32...Qh5 33.g3 Nf6 34.Qg2 Ng4 (34...Re6 35.Qf3 Ng4 36.Re6 fe6 37.Nf1–/+) 35.Nf3 Re1 36.Re1 f6 (36...Nf6 37.Nh4 Nd5 38.Qf3 Qf3 39.Nf3=) 37.Bc1 1–0. alessandrocarvalhaes (1895) – stbcc28 (1935), lichess.org, 2020.

3.Nf3 Nd7

4.e3 Qc7 5.Be2 e5 6.0–0 Ngf6 7.Re1 g6 (7...d5 8.a3=+) 8.d3 Bg7 9.Nbd2 0–0 10.Qb1 Nd5 11.a3 h6 (11...N5b6 12.a4=) 12.e4 (12.c4 Ne7+=) 12...N5f6 13.h3 Nh5 14.Nh2 Nf4 15.Bf1 Kh7 16.Nhf3 f5 17.c3 a5 18.Qc2 b6 19.ef5 gf5 20.d4 (20.g3 Ng6=) 20...e4=+ 21.Nh2 b5 22.g3 Ng6 23.Be2 (23.ba5 Qa5 24.c4 d5 25.cb5 cb5=+) 23...Nf6 24.Rf1 (24.a4 ab4 25.ab5 Ra1 26.Ra1 cb5 27.Bb5 d5=+) 24...Nd5 (24...d5 25.Rfe1–/+) 25.Rfe1 e3 26.Ndf1 ef2 27.Kf2 Qf7 28.Ne3?? (28.Nf3 Be6=+) 28...Nf6 (better 28...f4 29.Nd5 A) worse 29...cd5 30.g4+= (30.Bb5 fg3 31.Kg3 Qf4 32.Kg2 Bf5–/+); B) 29...fg3 30.Ke3 gh2–+) 29.Rf1 (better 29.Bf3!? Ne4 30.Kg2=+) 29...Ne4–/+ 30.Kg1 (30.Kg2!? Qe6 31.Bd3 Ng3 32.Rf3–+) 30...Ng3–+ 31.Kg2? (31.Rf3 Ne2 32.Qe2 f4–+) 31...Nh5! 32.Nf3 (32.Bh5 Nh4 Double attack (32...Nh4 Decoy)) 32...Ngf4 33.Kf2? (33.Kh2 Qe6 34.Bc1 Ne2 35.Qe2 ab4 36.cb4 Bd4 37.Nd4 Qe5 38.Kg1 Rg8 39.Ng2 Qd4 40.Be3 Rg2 41.Qg2 Qe3 42.Kh2 Qe5 43.Kg1 Nf4–+) 33...Ne2 (33...Nh3 34.Ke1 Ng3 35.Kd2–+) 34.Ke2 (34.Qe2 Nf4 35.Qc2 Nh3 36.Ke2 Kg8–+) 34...Ng3 35.Kf2 Nf1 36.Rf1 Qh5 37.Kg2 (37.h4 Kh8–+) 37...Kh8 38.Rh1 (38.Rg1 f4 39.Ng4 Bg4 40.hg4 Qg4 41.Kf2 Qe6–+) 38...f4 39.Ng4 (39.Nf1 Bf5 40.Qd2 Be4–+) 39...Bf5 (39...Bg4 40.Qd1 Be6 41.Kf2–+) 40.Qd2 (40.Qf2–+) 40...Bg4 41.hg4 (41.Qd1 Be6 42.Kf2–+) 41...Qg4 42.Kf2 Qg3 43.Ke2 Rfe8 (better 43...Qg2 44.Kd3 Qf3 45.Kc2 Qh1–+) 44.Kd3 Qf3 (44...Qg6) 45.Kc2–+ Re2 46.Rd1 Rd2 47.Rd2 Qg4 (47...Qe4 48.Kb3 ab4 49.ab4 c5 50.bc5 dc5 51.Rd1 c4 52.Kb4 Qd5 53.Ba3 Ra4) 48.Re2 Qf5 (48...Qe2 49.Kb1 ab4 50.cb4 Qd3 51.Ka2 Ra3 52.Ba3 Qc2 53.Bb2 Bd4 54.Ka3 Qb2) 49.Kd2 Qf6 0–1. alessandrocarvalhaes (1930) – dreamer303 (2005), lichess.org, 2020.

4.e3 e5 5.Be2 h6 6.d3 g5 7.Nbd2 Bg7 8.e4 Nf8 9.c3 (9.0–0 Be6=) 9...Ne6 (9...g4 10.Ng1 Ng6 11.h3=) 10.Qb3 (10.0–0!?=) 10...Nf4=+ 11.Bf1 Nf6 12.g3 Ne6 13.Be2 a6 14.a3 b5 15.Qc2 h5 16.h3 h4 17.Ng1 (17.gh4!? gh4 18.c4+=) 17...hg3 18.fg3 g4 19.h4 Bh6 20.Bf1 Be3 21.Ne2 Nh5 22.Bg2 Qf6 23.0–0–0? (better 23.Rf1 Qd8 24.Kd1=+) 23...Qf2–+ 24.Bf1 Ng3 25.Kb1?? (25.Ng3 Qg3 26.d4 ed4–+) 25...Nf1 (better 25...Nh1 26.d4 g3 27.de5 de5–+) 26.Nf1 g3?? (better 26...Bf4!? 27.h5 Qf3–+) 27.Ne3 (better 27.Nfg3!? Nf4 28.Rdf1=+) 27...Qe3–/+ 28.Rde1? (better 28.Rhg1 Rh4 29.Ng3–/+) 28...g2–+ 29.Rhg1 Rh4 (29...Qf3!? 30.Nc1 Nf4 31.c4 bc4 32.dc4–+) 30.Nc1 (30.Nd4 A) worse 30...ed4 31.Re3 de3 32.Qg2+– (worse 32.Rg2 Rh1 33.Bc1 Nf4=); B) 30...Nd4? 31.cd4 (31.Re3? Nc2 32.Kc2 Bh3–+) 31...Qe1 32.Re1+–; C) 30...Qe1 31.Re1 Rh1=) 30...Qf4 (30...Qg3 31.Qg2 Qg2 32.Rg2–+) 31.Qg2 Ke7 (31...Rh2!? 32.Qg8 Ke7–+) 32.Ne2 Bd7?? (better 32...Qe3 33.Kc2 Qh3=+) 33.Nf4+– Nf4 (33...Rf4 34.Bc1 Rf6 35.Bg5 Ng5 36.Qg5+–) 34.Qf3 (better 34.Qg5 f6 35.Qh4+–) 34...Rah8 (34...Rh3 35.Rg3 Rg8 36.Rh3 (worse 36.Rg8 Rf3 37.d4 Nd3=+) 36...Bh3 37.Bc1+–) 35.Rd1 (35.Bc1 Rh3 36.Rg3 R8h4+–) 35...Kd8 (35...Rh2 36.d4 R8h3 37.Rg3+–) 36.Qg3 (36.d4!? Rh3 37.Qf1 Kc8+–) 36...Kc7 (36...Bg4 37.Rd2 Ne2 38.Qg4 Rg4 39.Rg4+–) 37.Qg5 (better 37.Qg7 f5+–) 37...f6 (37...Nh3 38.Qf6 Ng1 39.Rg1 Rh3+–) 38.Qf6 Ne2 (38...R4h6 39.Qf7 R8h7 40.Rg7 Rg7 41.Qg7+–) 39.Rgf1 (better 39.Rg6 Kc8 40.Qd6 Rd8+–) 39...Ng3 (39...Nf4+–) 40.Rg1 Ne2 41.Rg2 (better 41.Rg6 Kc8 42.Qd6 Rd8+–) 41...Nf4 42.Rg5 (42.Rg7 Rh1 43.Rh1 Rh1 44.Ka2 Nh5 45.Rd7 Kd7 46.Qf7 Kd8+–) 42...Rh3 (42...R4h6 43.Qf7 R8h7 44.Rg7 Rg7 45.Qg7+–) 43.Rg7 Nd3 (43...Rd8 44.Qe7 Rhh8+–) 44.Qe7 Rd8 45.Rdg1 (better 45.Bc1 d5 46.Rd3+–) 45...Nb2 (45...Rh2 46.Rg8 Rg8 47.Rg8 c5 48.Rg7 Rh1 49.Ka2 Rh3 50.Qd7 Kb6 51.Qd6) 46.Rg8 Rh2 (46...Re8 47.Re8 c5 48.Qd8 Kc6 49.Re7 Rh6 50.Qd7 Kb6 51.Qc7) 47.Rd8 (47.Qd8 Kb7 48.Qb8) 47...Kb6 (47...Rh8 48.Rd7 Kc8 49.Rb7 Rh2 50.Rg8) 48.Rg7 (48.Rg7 Rh1 49.Ka2 Rh5 50.Rb8 Ka7 51.Qd7 Kb8 52.Qe8; 48.Rd7 a5 49.Qd8 Ka6 50.Qa5) 1–0. alessandrocarvalhaes (1940) – voytsekh (2005), lichess.org, 2020.

4.e3 Ngf6 5.c4 g6 6.Be2 Bg7 7.0–0 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d6 7.0–0 Nbd7).

4.e4 Qc7 5.d4 e5 6.de5 Ne5 7.Ne5 de5 8.a3 Nf6 9.Nd2 Be6 10.Bd3 Rd8 11.0–0 Be7 12.Nf3 Ne4 (12...Nd7 13.Qd2=) 13.Qe2 Nf6 14.Be5 Bd6 15.Bb2 Be7 16.Rfe1 0–0 17.Be5 (17.Nd4 Bd6 18.Ne6 fe6 19.Qe6 Kh8+–) 17...Qd7 18.Rad1 Qc8 19.Ng5 h6 (better 19...Bf5!?+=) 20.Bf6+– Bf6 21.Nh7 Bc3 22.Nf8 Kf8 23.Rf1 Bg4 24.f3 Bd4 25.Kh1 Be6 26.Qe4 g6 27.Qf4 h5? (27...g5 28.Qe4+–) 28.Qh6 (better 28.Bg6 Bb2 29.Bh5+–) 28...Bg7 29.Qg5 Re8 30.Qf4 (better 30.Qc5 Kg8 31.Qa7+–) 30...Qc7?? (better 30...Qb8 31.Qd2 h4+–) 31.Qc7 Bf6 32.Qf4 (better 32.Qb7 c5 33.Qa7 cb4 34.ab4+–) 32...Re7 33.Qf6 Re8 (33...Rd7 34.Rfe1 Rd5 35.Re6 Kg8 36.Re8 Kh7 37.Qh8) 34.Bg6 Re7 (34...Ra8 35.Rd7! Kg8 36.Bf7 Bf7 37.Qf7 Kh8 38.Qg7) 35.Bh5 (35.Qh8) 35...Ke8 (35...Re8 36.Rd7! Kg8 37.Bf7 Bf7 38.Qf7 Kh8 39.Qe8) 36.Rfe1 (36.Qh8) 36...Kf8 (36...Rd7 37.Re6 Re7 38.Qe7) 37.Re6! (37.Re6 Kg8 38.Rd8 Re8 39.Rde8 Kh7 40.Qf7) 1–0. alessandrocarvalhaes (1905) – churchofcoltrane (1975), lichess.org, 2019.

3.Nf3 Nf6

4.e3 Qc7 5.Be2 Bg4 6.0–0 Nbd7 7.Re1 e5 8.e4 Be7 9.d3 0–0 10.Nbd2 Bh5 11.c4 a6 12.a4 b5 13.a5 (13.cb5 ab5 14.ab5 Ra1 15.Ba1 cb5+=) 13...Rfc8 (13...bc4 14.dc4 c5 15.Bc3 cb4 16.Bb4=) 14.cb5 cb5 15.Qb3 Qd8 16.Rad1 Qf8 17.Ng5 (17.d4 Bg6 18.Bd3 Rc6+=) 17...Be2 18.Re2 d5 19.ed5 Bb4 20.Ngf3 Will e5 fall? (better 20.d4 ed4 21.Bd4 Ba5 22.Nde4 Ne4 23.Ne4=+) 20...Nc5?? (20...Ba5 21.Ne4=+) 21.Qa2?? (better 21.Qb4 Nd5 22.Qh4+–) 21...Nd3=+ 22.Ne5? (22.Ne4 Nb2 23.Nf6 gf6 24.Rb2 Rc3–/+) 22...Nb2 (22...Nf4 23.Ree1 Rc2 24.Nef3–+) 23.Qb2–/+ Bd6 (23...Nd5 24.Ne4 Nc3 25.Nc3 Bc3 26.Qa2–+) 24.Nc6 (better 24.Ne4!? Ne4 25.Re4=) 24...Nd5–/+ 25.Rc1?? (25.Qd4 Rc6 26.Qd5 Rac8–/+) 25...Nb4 (25...Ba3 26.Ne7 Qe7 27.Rc8 Rc8 28.Re7 Bb2 29.Rd7–+) 26.Qd4?? (26.Nb4 Bb4 27.Nb3 Rc1 28.Qc1 Qd8–+) 26...f6 (better 26...Nc6 27.Qa1 Ba3–+) 27.Ne4 (27.Nb3!?–/+) 27...Be5 (27...Rc6?! 28.Rc6 Be5 29.Qc5 Nc6 30.Qc6–/+; 27...Nc6 28.Qd5 Kh8 29.Qd6 Na5 30.Rc8 Qc8 31.Nd2–+) 28.Qd7 Qd6?? (better 28...Kh8 29.Ree1 Rc7 30.Ne5 Rd7 31.Nd7 Qf7–+) 29.Qh3 (29.Nd6 Bd6 30.Ne7 Be7 31.Rc8 Bf8 32.Ra8 h5 33.Rf8 Kh7 34.Qf5 g6 35.Re7 Kh6 36.Rh8) 29...Nc6 (better 29...Rc6 30.Rb1 Qd3 31.Qd3 Nd3–+) 30.Nd6+– Bd6 31.Qe6 Kh8 32.Qd6 Rd8 (32...Na5 33.Rc8 Rc8 34.Qc7+–) 33.Qc6 Rac8 34.Qc8 Rc8 (34...h6 35.Qd8 Kh7 36.Qd3 f5 37.Qf5 g6 38.Re7 Kg8 39.Rc8) 35.Rc8 1–0. alessandrocarvalhaes (1900) – stbcc28 (1930), lichess.org, 2020.

4.e3 e5 5.d3 Nbd7 6.e4 (6.Be2 a5=) 6...g5 (6...Qb6 7.a3=+) 7.h3 (7.Ng5 d5 8.a3 c5+=) 7...g4 8.Ng1 (8.hg4 Ng4 9.a3 a5=) 8...h5 9.g3 (9.hg4 Ng4 10.a3 a5=) 9...Be7 (9...Bh6 10.Be2=+) 10.h4 (10.hg4!? Ng4 11.d4=) 10...Nb6 11.Nd2 Be6 12.Qe2 (12.c4!?=+) 12...Na4–/+ 13.Ba3 (13.Rb1 Nb2 (13...Ba2?! 14.Ra1=) 14.Rb2 d5–/+) 13...b5 14.Nb1 Qc7 15.Qd2 d5 16.Nc3 (16.ed5!? Bd5 17.Rh2–+) 16...Nc3–+ 17.Qc3 d4 18.Qd2 a5 19.Ne2 ab4 20.Bb4? (20.Bb2–+) 20...Nd7 (better 20...c5–+) 21.Be7–/+ Ke7 22.Qg5 f6 23.Qg7?? (better 23.Qd2–+) 23...Kd6 24.Qg6 (24.Nd4 ed4 25.e5 fe5–+) 24...Qa5 25.Kd1 Rag8 (25...Ba2?! 26.Qf5 Qd8 27.f4–+) 26.Qg8 Rg8 27.Nc1 (27.Bg2 Ra8–+) 27...Nc5 28.Be2 (28.Rb1–+) 28...Na4 29.Nb3 Nc3 30.Ke1 Ne2 (better 30...Bb3 31.cb3 Qa3–+) 31.Kf1?? (better 31.Na5 Nc3 32.Rf1=) 31...Ng3! 32.fg3 Qc3 (better 32...Bb3 33.cb3 Qd2 34.Rg1–+) 33.Rc1 (33.Rd1 Bb3 34.cb3 Qc2–+) 33...f5 (better 33...Bb3!? 34.ab3 Qd2 35.Ra1–+) 34.ef5 (34.Ke2 Bb3 35.ab3 fe4–+) 34...Bf5 (34...Bb3 35.Rh2 Qb2 36.Rd1 Bc2 37.Kg1–+) 35.Kg2 (35.Rh2 Bd3! 36.cd3 Qd3 37.Kg1 Qg3 38.Kh1 Ra8–+) 35...Ra8 (better 35...Be4 36.Kg1 Bh1 37.Kh1–+) 36.Rhe1 (36.Rh2 c5 37.Kg1 c4–+) 36...Ra2 37.Re2 Kd5 (37...Bd3 38.Nd2 Rc2 39.Rc2 Bc2 40.Kh2–+) 38.Kf1 Rb2 (better 38...Bd3 39.cd3 Qb3 40.Ra2 Qa2–+) 39.Na1 Bd3! 40.Kf2 (40.cd3 Qc1 Mate attack) 40...Be2 41.Ke2 Qe3 42.Kd1 Qg1 (42...d3 43.c4 bc4 44.Rc2 Rb1 45.Rc1 Qc1) 43.Kd2 Qf2 44.Kd1 Qg3 (44...e4 45.c4 dc3 46.Rc3 Qd2) 45.Nb3 Qf3 46.Kd2 (46.Ke1 d3 47.Kd2 b4 48.Nd4 Kd4 49.Rg1 Rc2 50.Ke1 d2) 46...g3 (46...Qe3 47.Kd1 d3 48.Nd4 ed4 49.c4 bc4 50.Rc4 Qd2) 47.Na1 (47.Nd4 Qf4 48.Ke1 Qc1 49.Ke2 ed4 50.Kf3 Rc2 51.Kg3 Qe3) 47...g2 (47...e4 48.Re1 Qf4 49.Kd1 Rb1 50.Ke2 Qf2) 48.Rd1 (48.Re1 g1Q! 49.Kc1 Qe1 50.Kb2 Qfc3 51.Ka2 Qea1) 48…Qe3 0–1. alessandrocarvalhaes (1760) – michele31795 (1620), lichess.org, 2018.

4.e3 Bg4 5.h3 Bh5 6.Be2 Nbd7 7.d4 Nb6 8.a4 e5 9.c3 e4 10.Nfd2 d5?? (better 10...Be2 11.Qe2 d5=+) 11.Bh5+– g6 (11...Nh5 12.Qh5 Bd6 13.0–0+–) 12.Be2 h5 13.a5 Nbd7 14.Nb3 Nh7 15.N1d2 Qg5 16.g3 h4 17.g4 Nhf6 18.Nf1 Bd6 19.Qc2 Rf8 (19...a6 20.Nc5 0–0–0 21.c4 Nc5 22.bc5+–) 20.Nh2 (20.Nc5 Nc5 21.bc5 Bc7+–) 20...Nh7 21.Nf1 (21.Nc5 Bc5 22.bc5 f5+–) 21...f5?? (21...Nhf6 22.Nc5 Bc5 23.bc5 Rg8+–) 22.Rg1 f4 23.Qd2 (23.b5 fe3 24.Ne3 Rf2 25.Kf2 Qf4 26.Ke1 Qe3+–) 23...f3 24.Bd1 Qf6 25.Bc2 Ng5 26.Rh1 Ke7 (26...0–0–0 27.Nc5+–) 27.Ba3 (27.c4 dc4 28.Nc5 Nc5 29.bc5 Bc5+–) 27...Rf7 (27...b5 28.Bb2+–) 28.Nc1 (28.c4 Kf8+–) 28...Raf8 (28...Kf8 29.Ba4+–) 29.Ba4 b6? (29...a6+–) 30.Bc6 Rc8 (30...Qe6 31.Qa2 Nf6 32.b5+–) 31.Bd5 Rff8 32.a6 b5 33.Nb3 (33.Qc2 Nb6 34.Bb7 Rc7+–) 33...Nb6 34.Bb7 Nc4 35.Qc1 Rc7 36.Nfd2 Ne3 (36...Na3 37.Qa3 Rc3+–) 37.fe3 f2 38.Kf1 Bg3 39.Ne4 (better 39.Nc5+–) 39...Qf3 (39...Qe6 40.d5 Qe4 41.d6 Bd6 42.Be4 Ne4+–) 40.Ng5 Qh1 41.Bh1 1–0. alessandrocarvalhaes (1745) – michele31795 (1635), lichess.org, 2018.

4.Bf6 ef6 5.c3 Be6 6.d4 Be7 7.e4 Na6 (7...d5 8.ed5 Bd5 9.Bd3=) 8.Nbd2 (8.d5!? cd5 9.Bb5 Bd7 10.Qd5 Bb5 11.Qb5 Qd7 12.a4+–) 8...Nc7= 9.Bd3 h6 10.0–0 Qd7 11.Re1 g5 12.Qc2 h5 (12...d5+=) 13.e5 (better 13.c4!?+–) 13...fe5 14.de5 g4 15.Nd4 de5 16.Re5 (16.Ne6 Qe6 17.Bf5 Qf6+=) 16...Bd6 17.Ree1 0–0–0 18.Ne6 (better 18.Nc4!?=) 18...fe6 19.Ne4 Bh2 20.Kh2 Qd3 21.Qd3 Rd3 22.Rad1 Rhd8 23.Rd3 Rd3 24.Rc1 (24.c4 Rd4–/+) 24...Nd5 25.Nc5 (25.a3 h4–/+) 25...Rd2 26.Kg3 e5 27.a3 Nf4 28.c4?? (28.Re1 b6 29.Ne4 Rd8–/+) 28...Nd3 (better 28...Ne2 29.Kh4 Nc1 30.Kh5 Rd4–+) 29.Nd3–/+ Rd3 30.Kh4 Ra3 31.b5 Ra2 32.f3? (better 32.Kh5 Rf2 33.g3–/+) 32...Rg2–+ 33.fg4 hg4 34.bc6 bc6 35.c5 Kd7 36.Re1 (36.Rd1 Ke6 37.Rd6 Kf5 38.Rc6–+) 36...Ke6 37.Ra1 Rc2 (better 37...e4 38.Ra7 e3 39.Kg5–+) 38.Ra7 Rc5 39.Ra6 (39.Kg4 Rc3–+) 39...Kd5 (better 39...Rc4 40.Ra8–+) 40.Kg4 Rc4 41.Kf5 e4 42.Kf4 e3! 43.Ke3 Rc3 44.Kd2 Rb3 45.Kc2 Rb8 46.Kc3 c5 47.Ra7 Rh8 48.Rd7 Kc6 49.Rd1 Kb5 (better 49...Rh3!? 50.Rd3 Rh1–/+) 50.Rb1= Kc6 51.Rd1 Rh4 52.Rd8 Rh3 (52...Rh1!?–/+) 53.Kc4=+ Rh4 54.Kc3 Kc7 55.Rd1 Kb6 56.Rb1 Kc6 57.Rd1 Rh3 58.Kc4 Rh4 59.Kc3 Kb5 (better 59...Re4!?–/+) 60.Rb1= Ka4 61.Rb8 (61.Ra1 Kb5 62.Rb1 Ka6 63.Ra1 Kb7 64.Rb1 Kc8=) 61...Rb4 (better 61...Rh1!?–/+) 62.Ra8 Kb5 63.Rb8 Ka4 64.Ra8 Kb5 65.Rb8 Kc6 66.Rb4 cb4 67.Kb4 ½–½. alessandrocarvalhaes (1830) – Ezredes69 (1865), lichess.org, 2019.

4.Bf6 ef6 5.e4 Bg4 6.Be2 Nd7 (6...d5 7.ed5 Bb4 8.c3=+) 7.d3 Ne5 8.Nbd2 Be7 9.d4 Nf3 10.Bf3 (worse 10.Nf3 d5 11.Nd2 Be2 12.Qe2 Bb4 13.ed5 Kf8=+) 10...Bf3 11.Nf3 (11.Qf3 d5=) 11...Qb6 (better 11...d5!? 12.Qd3 Bb4 13.c3 Qe7–/+) 12.a3 0–0 13.0–0 Rfe8 14.Re1 White plans e5 14...a5 15.c3 ab4 16.ab4 Kf8 17.Qd3 Ra6 18.e5 (18.Ra6 Qa6 19.Qa6 ba6+–) 18...fe5 19.Qh7 f6? (better 19...Bf6+–) 20.Nh4+– (20.de5?! fe5 21.Qh8 Kf7 22.Qh5 Kf8 23.Ra6 Qa6 24.Qh8 Kf7+=) 20...Kf7?? (20...Ra1 21.Ra1 Qc7+–) 21.Qg6 Ke6 22.Qg7 (better 22.Ra6 Qd8 23.de5 de5 24.Ra5+–) 22...Rea8? (better 22...Kd7+–) 23.Qg4 Kf7 24.Nf5?? (24.Ra6 Qa6 25.Qg6 Ke6 26.Qf5 Kf7 27.Qh7 Ke6 28.Ng6+–) 24...Rg8 (24...Ra1 25.Qg7 Ke6 26.Qe7 Kf5 27.Qd7 Kg6 28.Qg4 Kh7 29.Qh3 Kg7 30.Qd7 Kf8 31.Qd6 Kg7 32.Qd7 Kg6 33.Qg4 Kh6 34.Qh3 Kg5 35.Qg3 Kf5 36.Qh3 Kf4 37.Qg3 Kf5 38.Qh3 Kg6 39.Qg4 Kf7 40.Qd7 Kg8 41.Qe6 Kh7 42.Qh3 Kg7 43.Qd7 Kh8 44.Qh3 Kg7 45.Qd7=) 25.Qh5 (better 25.Nh6 Ke8 26.Ng8+–) 25...Ke6 26.Nh6 Rg7 (26...Rg5 27.Qh3 f5 28.Ra6 Qa6+–) 27.Qh3 (27.Qf5 Kd5 28.c4 Kd4 29.Qe4 Kc3 30.Rec1 Kb4 31.c5 Kb5 32.Qc4) 27...Kd5 (27...f5 28.Qf5 Kd5 29.c4 Kd4 30.Qe4 Kc3 31.Rec1 Kb4 32.c5 Kb5 33.Qc4) 28.Nf5 (28.c4 Kc4 29.Rec1 Kd5 30.Qb3 Ke4 31.Qf3 Kd4 32.Nf5) 28...Rf7 (28...Ke6 29.Ng7 Kf7+–) 29.Nh6 (29.Ne3 Ke4 30.Qf5) 29...Rh7?? (29...Rg7 30.c4 Kc4 31.Rec1 Kd5 32.Qb3 Ke4 33.Qf3 Kd4 34.Nf5) 30.Qf3 (30.c4 Kc4 31.Rec1 Kd5 32.Qb3 Ke4 33.Qf3 Kd4 34.Nf5) 30...Ke6 (30...e4 31.Qe4 Kc4 32.Qe2 Kb3 33.Rab1 Kc3 34.Rec1 Kd4 35.Rd1 Kc3 36.Qd3) 31.Qf5 Kd5 32.de5 (32.c4 Kd4 33.Rac1 Qb4 34.Qe4 Kc5 35.Qe3) 32...Rh6 33.Red1 Kc4 34.Qd3 Kb3 35.Rab1 (35.Rdb1) 35...Ka4 36.Ra1 Kb3 37.Rdb1 1–0. alessandrocarvalhaes (1755) – michele31795 (1630), lichess.org, 2018.

4.h3 e6 (4...e5 5.a3=+) 5.g4 Na6 6.c3 (6.a3 e5=) 6...Nc7 7.a4 Be7 8.g5 Ng8 9.Rg1 f6 (9...e5 10.e4=+) 10.c4 e5 (10...fg5? 11.Bg7 Bf6 12.Bh8 Bh8 13.Rg5+–) 11.h4 Ne6 12.e3 b6 13.Bh3 Bd7 (13...e4 14.Be6 Be6 15.Nd4 Bc4 16.Qg4=) 14.Be6 Be6 15.Qc2 Qd7 16.d4 Bg4 17.Nfd2 h6?? (17...Rd8!?=) 18.d5 (better 18.Qg6 Kf8 19.gf6 Nf6 20.f3+–) 18...cd5 (18...Bh5 19.dc6 Qc6=) 19.cd5 (better 19.Qg6 Kf8 20.gf6 Nf6 21.f3+–) 19...Bh5 (19...fg5 20.Rg4 Qg4 21.Qc6 Kf7 22.Qa8 gh4 23.Qa7+–) 20.g6 (20.gh6!? Nh6 21.Qc6=) 20...Rc8=+ 21.Qd3 Qh3 (21...f5 22.a5=+) 22.Qb5 White prepares the advance a5 (22.a5 A) 22...Qh4 23.Qb5 Kd8 24.ab6 ab6 25.Ra7+– (25.Qb6?! Ke8+–); B) 22...ba5 23.Ra5 Qd7= (23...Qh4 24.Qb5 Kf8 25.Ra7+=)) 22...Kd8 23.a5 Qd7 (better 23...f5!? 24.ab6 Bh4=) 24.Qd7+= Kd7 25.ab6 ab6 26.Ra7 Rc7 27.Ra6 (27.Rc7 Kc7 28.Nc4 Bd8=) 27...Rb7 (27...f5 28.Rb6 Nf6 29.Rb5=+) 28.Nc4 b5?? (better 28...Bd8=) 29.Na5+– Rc7 30.Rb6?? (better 30.Na3+–) 30...f5 (better 30...Rc2 31.Nc3 Bf3 32.Rb7 Kc8+=) 31.Rb8?? (31.Nc3 A) 31...Bh4? 32.Nb5 (worse 32.Rb5 Ne7=+) 32...Be7 33.Nc7+–; B) 31...Nf6 32.Nc6 Rhc8 33.Rb5 Nd5 34.Nd5 Rc6 35.Nb6 Rb6 36.Rb6 Rc2–+) 31...Bd8?? (better 31...Rc2 32.Nc3 Bh4 33.Rb7 Kc8=) 32.Nc6 (worse 32.Rb5 Rc2 (worse 32...Bh4 33.Rh1+–) 33.Rb7 Kc8 34.Rg7 Rb2–/+) 32...Nf6 33.Nc3 (better 33.Rb5 Ng4 34.Rb8+=) 33...Rc8?? (better 33...Nd5 34.Nd5 Rc6 35.Rb7 Ke6–+) 34.Rc8+– Kc8 35.Nb5 Kd7 (35...Ne4+–) 36.Nd8 (better 36.Be5 de5 37.Ne5 Ke7 38.d6 Ke8 39.Nd4+–) 36...Rd8= 37.Nc3 (37.f4!? Nd5 38.fe5 de5 39.Be5+=) 37...Rb8=+ 38.b5 Bf3 39.Kd2 Nd5 (39...Bd5?! 40.Ra1= (worse 40.Nd5 Nd5 41.Ra1 Rb5 42.Ra7 Kc6–/+)) 40.Ra1 Rb7 (40...Ne7 41.Ra7 Ke6 42.Ba3–/+) 41.Ra5 (41.Nd5 Bd5 42.Ra5 Bc4=) 41...Nc3 (41...Ne7!?–/+) 42.Bc3 Bh5 0–1. beatmeeasy (1985) – MARS202020 (2085), lichess.org, 2020.

4.a3 e5

5.Nc3 Bf5=.

5.e3 Be6 6.Be2=.

5.e3 Be7

6.c4 0–0!? =+.

6.c4 c5 7.bc5+= Nc6 8.cd6 Qd6 9.Nc3 a6 (9...0–0 10.d4 ed4 11.Nb5+=) 10.d4+/– e4 (10...ed4!? 11.ed4 0–0+/–) 11.c5+– Qd7 (11...Qc7 12.Nd2 0–0 13.d5+–) 12.Nd2 Qf5 (12...Rb8 13.Nde4 b6 14.Rb1 bc5 15.d5 Ne4 16.Ne4+– (16.dc6?! Qc6 17.Qd5 Qd5 18.Nd5 Bh4=)) 13.Qc2 Qg6 (13...Nd4 14.ed4 e3 15.Nde4 ef2 16.Kd1 Qh5 17.Kc1+–) 14.d5 Bc5 (14...Na7 15.d6 Bd8+–) 15.dc6 bc6 (15...Be7+–) 16.Na4 Nd7 17.Nc5 Nc5 18.Qc5 Bf5 19.Rb1 Bd7 20.Nc4 Bc8 (20...f6+–) 21.Ne5 Qh6 22.Nc6 Bd7 23.Qe7 1–0. pierre – Kilo2000, ChessHere.com, 2006.

6.Be2 0–0 7.0–0 a5 (7...e4 8.Ne1=) 8.c4 (8.b5 e4 9.Ne1 d5=) 8...e4 9.Nd4 d5 10.cd5 Qd5 11.Nc3 Qg5 12.f3 ab4 13.ab4 Ra1 14.Ba1 ef3 (14...Bh3 15.Rf2=) 15.Nf3 Qg6 16.Qa4 Bd6 17.b5 c5 (17...Bh3 18.Nh4 Qg5 19.Rf6 Qf6 20.gh3+/–) 18.Bd1 (18.Qh4 Re8=) 18...Re8 19.Bc2 Bf5 20.Bf5 Qf5 21.Qa7 Qd7 22.Qa2 (22.Qa4 Re7=) 22...Qf5 (22...Qe6 23.Qe6 Re6 24.Bb2=) 23.b6 (23.Qc4 Nbd7=) 23...Nbd7 (23...Qd3 24.Qb1 Qb1 25.Rb1= (< 25.Nb1 Nd5–/+)) 24.Nb5 Qd3 25.Ng5?? (better is 25.Qb1 Qd5 26.Rc1=) 25...Bh2!–/+ (25...Qb5 26.Qf7 Kh8 27.Bf6 Qf1 28.Kf1 Nf6 29.Qc4+–) 26.Kh2 Qf1 (26...Qb5 27.Qf7 Kh8 28.Bf6 Nf6 29.Rf6 Rg8 30.Qh5 h6 31.Rh6 gh6 32.Qh6) 27.Qf7 Kh8 28.Bf6 Nf6 29.Nd6 (29...Ra8 30.Ne6 Ng4 31.Kg3 Qf7 32.Nf7 Kg8 33.Nd6=). Woelfelschneider,Peter (1700) – Rosner,Dirk (1700), TT–01 TSC, 2002.

6.Be2 e4 7.Nd4 c5=.

3.f4 Qb6

4.a3 a5 5.e3 ab4 6.Nf3 (6.Bd4 c5 7.ab4 Ra1 8.Ba1 Qb4=+) 6...Nf6 (6...ba3 7.Ba3 Na6 8.Nc3=+) 7.ab4 Ra1 8.Ba1 Qb4 9.Be2 g6 10.Bc3 Qb6 11.Na3 (11.Bf6 ef6 12.Nc3 Bg7=+) 11...Bg7 12.Nc4 Qc7 (12...Qa7 13.Bd4 c5 14.Bf6 Bf6 15.e4–/+) 13.Ba5=+ Qd7 14.Nb6 Qe6 (14...Qf5 15.Bc3 0–0 16.Qb1=+) 15.Qa1 0–0? (better 15...Nh5 16.Nd4 Bd4 17.Qd4 Nf6=) 16.Nd4+– Ne4?? (better 16...Nd5 17.Ne6 Ba1 18.Nf8 Nb6+–) 17.Ne6+– Ba1 18.Nf8 Kf8 (18...Bf5 19.g4 Kf8 20.gf5 gf5 21.d3 Bc3 22.Bc3 Nc3 23.Kd2 Ne2 24.Ke2+–) 19.Nc8 Nc5 (19...b5 20.Bf3 d5 21.c3+–) 20.0–0 Bg7 21.Rb1 f5 (21...b5 22.c4+–) 22.d4 Ne4 (22...Nbd7 23.dc5 Nc5 24.Bd8+–) 23.Rb7 Na6 (23...Bf6 24.Rb8 Kf7 25.Rb7+–) 24.Ba6 c5 (24...Bf6 25.Bd8+–) 25.Rb8 cd4 26.Nd6 1–0. Pierre – Guest55JH, internet, 2020.

4.Bc3 Nf6 5.e3 (5.a3 e5 6.fe5 Ne4 7.e3 Nc3 8.Nc3) 5...Nd5 6.a3 Nc3 7.Nc3 g6 8.d4.

3.h3 Qc7

4.Nf3 Nd7 5.a4 h6 6.Nd4 (6.e4!?=) 6...e5=+ 7.Nf3 Ne7 8.g3 g5 (8...Nf6 9.Bg2=+) 9.Bg2 Ng6 10.h4 g4 11.Ng1 h5 12.f4 (12.c4 Bg7=+) 12...gf3 13.Nf3 (13.ef3 Rg8 14.Ne2 d5–/+) 13...Nf6 (13...d5 14.e4 Bb4 15.Rf1–/+) 14.d3 (14.Rf1 Bg7=+) 14...Bg4 (14...d5 15.Qd2–/+) 15.Nh2 Be6 16.e3 Bd5 17.e4 Be6 18.Rf1 Be7 19.Nd2 (19.c4 d5 20.cd5 cd5–/+) 19...0–0–0 (19...Qb6 20.Nhf3–+) 20.Ndf3 (20.b5 Rhg8 21.Qe2 Qa5=+) 20...Ng4 21.Qd2 Qb6 22.a5 Qe3 23.Qe3 Ne3 24.Rf2 Ng4 25.Ng4 Bg4 (25...hg4 26.Ng5 Bg5 27.hg5=+) 26.Nd2 (26.d4 Rhf8=) 26...Be6 (26...Nh4 27.gh4 Bh4 28.d4=+) 27.c4 Rhg8 28.Rf3?? (28.Bf3 Nh4 29.gh4 Bh4=+) 28...Bg4?? (better 28...Nh4 29.Rf2 Rg3–+) 29.Re3 (29.Rf7 Rdf8 30.Re7 Ne7=) 29...Nf8 (better 29...f5!? 30.ef5 Nh4 31.gh4 Bh4 32.Kf1 Bg5=+) 30.Bf3+= Be6? (better 30...Ne6!?+=) 31.Bh5+– Nd7 32.0–0–0 Nf6 33.Be2 Rg7 (better 33...Ng4 34.Bg4 Rg4+–) 34.Nf3?? (34.d4!? ed4 35.Bd4+–) 34...Rdg8?? (better 34...Ng4 35.Kd2 d5–+) 35.Ng5+= Ng4 36.Bg4 (36.Ne6!? Ne3 37.Ng7 Rg7 38.Rh1 Rg3 39.h5+=) 36...Bg4= 37.Rf1 Attacking the backward pawn on f7 37...Bg5 38.hg5 Be6 39.c5 Kd7 (39...dc5 40.bc5 Rg5 41.Ref3=) 40.cd6+= Kd6 41.d4 ed4 (41...Rg5!? 42.de5 Ke7+=) 42.Bd4+– Rg5 43.Ba7 Rg3?? (better 43...Kd7+–) 44.Rg3+– Rg3 45.Bb8 Ke7 46.Bg3 Bc4 47.Rd1 Ke6 (47...Be2 48.Bh4 Ke6 49.Rd8+–) 48.Rd4 Bb5 (48...Ba6 49.Rd6 Ke7 50.e5+–) 49.Rd6 Ke7 50.e5 Bc4 (50...Kf8+–) 51.Bh4 Ke8 (51...f6 52.Bf6 Kf7 53.Rd7 Ke6 54.Rb7 Be2+–) 52.Rd8 1–0. beatmeeasy (1880) – papopapyrus (1820), lichess.org, 2020.

4.g4 Nd7 5.Bg2 e5 6.e3 Ngf6 7.d3 Be7 8.Nd2 Nd5 9.a3= N7b6 (9...N5b6 10.c4=) 10.Nb3 (10.c4 Nf6=) 10...f5 (10...Na4 11.Bc1=+) 11.gf5 (11.c4 Nf6 12.g5 Nfd7=) 11...0–0 (11...Bf5 12.Ne2 Nf6 13.c4=+) 12.Ne2 (12.c4 Nf6=) 12...Nd7 (better 12...Bh4!? 13.0–0 Na4+= (worse 13...Bf5 14.e4+–)) 13.Ng3 (13.e4 N5b6+=) 13...N7f6 14.Qd2 (14.c4 Nb6+=) 14...c5 (14...Nb6 15.Rg1+=) 15.bc5+– dc5 16.Qe2 (better 16.Rg1+–) 16...b6?? (16...Nb6 17.c4+=) 17.Nh5?? (better 17.c4 Bb7 18.cd5 (18.Bd5?! Nd5 19.cd5 Bd5+=) 18...Nd5 19.Rg1+–) 17...Bb7+– 18.Nf6 (18.Ng7 Kg7 19.c4 Nf4 20.ef4 Bg2+–) 18...Nf6 19.Bb7 Qb7 20.0–0–0 (20.e4 Qc7+=) 20...e4 21.de4 Ne4 (21...Qe4 22.Qd3 c4 23.Qe4 Ne4 24.Rd7–/+) 22.Qg4 (22.Rhg1!? Bf6 23.f3 Bb2 24.Kb2+–) 22...Bf6+= 23.Bf6 Rf6 24.Rhg1 (better 24.Qf3!?+=) 24...Nf2–/+ 25.Qc4 Qf7 26.Qf7 Rf7 27.Rdf1 (27.Rd2 Rf5 28.Rd7 g6–/+) 27...Rf5 (27...Nh3 28.Rg3 g6 29.e4+–) 28.Rg3? (28.Nd2!?–/+) 28...Raf8 (better 28...Nd3! 29.cd3 Rf1 30.Kc2–+) 29.Rfg1 g6 30.h4 (30.Re1 Rh5–+) 30...Ne4 (30...Rh5!? 31.Nd2–+) 31.R3g2 Rf1 32.Rf1 (32.Kb2 Rg1 33.Rg1 Re8–+) 32...Rf1 33.Kb2 Rh1 34.Rg4 (34.Nd2 Rh4 35.c3 Kf7–+) 34...Nf2 35.Rf4 Nd1 36.Ka2 (36.Kc1 Ne3 37.Kd2 Nf5–+) 36...Ne3 37.Nd2 (37.Kb2 Rh2 38.Na1 Nf5–+) 37...Nc2 38.Nf3 (38.Kb2 Nd4 39.Ne4–+) 38...Rf1 39.Kb2 (39.Rc4 Rf2 40.Ne5 Ne3 41.Kb3 Nc4 42.Nc4 Rh2–+) 39...Nd4! 40.Kc3 (40.Nd4 Rf4 Double attack (40...Rf4 Pinning; 40...Rf4 Deflection; 40...Rf4 Decoy)) 40...Rf3 (better 40...Ne2 41.Kc4 Nf4 42.Ne5–+) 41.Rf3 Nf3 42.Kc4 Nh4 43.Kb5 (43.Kd5 g5 44.Ke4 g4–+) 43...Nf5 44.Ka6 Nd6 45.Ka7 Nc4 (45...c4!? 46.Kb6 c3 47.a4–+) 46.Ka6 Na3 47.Kb6 Kf7 (better 47...c4 48.Kc5 c3–+) 48.Kc5 Kf6 49.Kd4 Kf5 50.Ke3 Kg4 51.Kf2 h5 52.Kg2 Kf4 53.Kh3 g5 54.Kg2 Nc4 55.Kh3 Nd2 56.Kg2 g4 57.Kh2 h4 (57...Kf3 58.Kg1 g3 59.Kh1 g2 60.Kg1 h4 61.Kh2 Kf2 62.Kh3 g1Q 63.Kh4 Nf3 64.Kh5 Qg5) 58.Kg2 h3 59.Kh2 Kf3 60.Kg1 (60.Kh1 g3 61.Kg1 g2 62.Kh2 Nf1 63.Kh3 g1Q 64.Kh4 Qg4) 60...Ne4 (60...g3 61.Kh1 Ne4 62.Kg1 h2 63.Kh1 Nf2) 61.Kh1 (61.Kh2 Nf2 62.Kg1 g3 63.Kf1 h2 64.Ke1 Ke3 65.Kf1 h1Q) 61...Ng5 (61...g3 62.Kg1 h2 63.Kh1 Nf2) 62.Kg1 Ke3 (62...Ke2 63.Kh2 Kf2 64.Kh1 h2 65.Kh2 g3 66.Kh1 g2 67.Kh2 g1Q) 63.Kh2 (63.Kf1 h2 64.Kg2 h1Q 65.Kh1 Kf2 66.Kh2 g3 67.Kh1 g2 68.Kh2 g1Q) 63...Kf3 (63...Kf2 64.Kh1 h2 65.Kh2 g3 66.Kh1 g2 67.Kh2 g1Q) 64.Kg1 g3 (64...Ke2 65.Kh2 Kf2 66.Kh1 h2 67.Kh2 g3 68.Kh1 g2 69.Kh2 g1Q) 65.Kh1 (65.Kf1 g2 66.Ke1 g1Q 67.Kd2 Qc5 68.Kd3 h2 69.Kd2 Ne4 70.Kd3 Qc3) 65...g2 (65...Ne4 66.Kg1 h2 67.Kh1 Nf2) 66.Kg1 (66.Kh2 Kf4 67.Kg1 Nf3 68.Kf2 g1Q 69.Ke2 Qe3 70.Kf1 Nd2) 66...Kg4 (66...h2 67.Kh2 Nh3 68.Kh3 g1Q 69.Kh4 Qg4) 67.Kh2 (67.Kf2 Nf3 68.Ke3 g1Q 69.Kd3 Qd4 70.Kc2 Qc4 71.Kb2 h2 72.Ka3 h1Q 73.Kb2 Qhc1) 67…Nf3 0–1. adabriwala – rugovit, lichess.org, 2019.

3.h4 Qc7

4.Nf3 e5 5.e4 Bg4 6.Qc1 (6.Be2 Nf6=+) 6...Na6 (6...Nf6!?–/+) 7.Ba6 ba6 8.Nh2 Be6 9.g4 (9.Nf3 a5 10.ba5 Rb8=+) 9...d5 10.Nf3 d4 (10...f6 11.ed5 Bg4 12.Nh2–+) 11.Rg1 Bb4 (11...Nf6 12.c3 Bg4 13.Nh2–/+) 12.Ba3 (12.c3!? dc3 13.Bc3=+) 12...Bd6 13.Bd6 Qd6 14.Qa3 c5 15.c3 d3 16.Ng5 Nf6 (16...Qc6 17.f3–/+) 17.Ne6 fe6 18.Qa4 Qd7 19.Qa6 (better 19.Qd7!? Nd7 20.Rg3–/+) 19...Ne4 20.Qd3?? (better 20.Qc4 Qd5 21.Qa4 Ke7 22.f3–+) 20...Qd3 21.f3 Nd6 (21...Rb8 22.fe4 0–0 23.a4 Rf4 24.g5 Re4 25.Kf2 Re2 26.Kf1 Rf8) 22.Kf2 0–0 (22...0–0 23.Kg2 Qe2 24.Kh1 Rf3 25.Re1 Qe1 26.Kg2 Qe2 27.Kg1 Rf1) 0–1. beatmeeasy (1915) – f77ff1566 (1835), lichess.org, 2020.

4.Nf3 e5 5.Ng5 (5.e4 Nf6=+) 5...Bg4 6.c3 h6 7.Nf3 Nf6 8.Nh2 Be6 9.Na3 Be7 10.e3 Nbd7 11.h5 a5 12.b5 Nc5 13.bc6 bc6 (13...Qc6? 14.Bb5 Qb5 15.Nb5+–) 14.d4 Nce4 15.Bd3 Rb8 16.Be4 (16.Qc2 d5–/+) 16...Rb2 17.Bd3 ed4 (17...0–0 18.Nc4 Bc4 19.Bc4–+) 18.ed4 Nd5 (18...0–0!? 19.c4–+) 19.Qc1–/+ Rb7 20.0–0 Bg5 (20...0–0 21.c4 Nb4 22.Qd2–/+) 21.f4=+ Bf6 (21...Be7 22.f5 Bd7 23.Nc4=+) 22.g3 (better 22.f5!? Bd7 23.Re1 Be7 24.Qd1=) 22...0–0–/+ 23.Rb1 Rfb8 24.Nf3 (24.Rb7!? Rb7 25.Re1–/+) 24...Rb1–+ 25.Bb1 Bg4 26.Nh2 Bh5 27.f5? (better 27.g4 Bg6 28.Bg6 fg6 29.g5–/+) 27...Bg5 28.Qe1 f6 (28...Ne3 29.g4 Nf1 30.Qf1–+) 29.g4 Re8 30.gh5? (30.Qg3 Bf7 31.Re1–+) 30...Re1 31.Re1 Nf4 (31...Nc3 32.Bc2–+) 32.Nf3 (32.Bc2–+) 32...Nh3 (better 32...Qf7 33.Kf2 Qh5–+) 33.Kg2 Nf4 34.Kf2?? (34.Kg1 Qf7 35.Kf2 Qh5 36.Re4–+) 34...d5–+ 35.Nc2 (35.Ng5 hg5 36.h6 gh6–+) 35...Nh3 (better 35...Nd3!? 36.Kg2–+) 36.Kg2 Nf4 37.Kf2 Nd3 38.Kf1 (38.Kg2 Qf4 39.Rf1 Qg4 40.Kh1 Qh3 41.Kg1 Qg3 42.Kh1 Bf4–+) 38...Ne1 (38...Qg3 39.Ke2 Nf4 40.Ke3 Nh5 41.Ke2 Qg2 42.Kd3 Qf3 43.Ne3 Qf2 44.Nd5 cd5 45.Re8 Kf7 46.Rf8 Kf8 47.c4 Qd2) 39.Nce1 Qg3 40.Bd3 (40.Ke2 Qb8 41.Bc2 Qb2 42.Ng5 hg5–+) 40...Be3 41.Ke2 Qf2 42.Kd1 Qa2 0–1. beatmeeasy (1915) – f77ff1566 (1845), lichess.org, 2020.

3.h4 Nd7

4.Nf3 Qc7 5.g4 Ngf6 6.g5 Nh5 7.e3 e5 8.d4 ed4 (8...g6!?=) 9.Nd4+– (worse 9.ed4 Nf4=+) 9...Ne5 10.Qh5?? (better 10.Be2 g6 11.f4+–) 10...Bg4–+ 11.Qg4 (11.Ne6 Qe7 (11...Bh5?? 12.Nc7 Kd7 13.Na8+–; 11...Be6?! 12.Qd1–/+) 12.Ng7 Bg7 13.Qg4 Ng4 14.Bg7 Qe4–+) 11...Ng4 12.Rh3 Ne5 13.f4 Nd7 14.Nd2 a6 (14...d5 15.Nf5 Rg8 16.h5–+) 15.c4 c5 16.Nc2 Be7 (16...Nb6 17.bc5 dc5 18.0–0–0–+) 17.a3? (better 17.Bg7!? Rg8 18.Bb2–/+) 17...0–0–+ 18.h5 cb4 19.Nb4 a5 20.Nd5 Qd8 21.Rg3 g6 (21...Rc8 22.Ne4 Re8 23.h6=+) 22.h6? (22.Ne4 Re8=+ (22...gh5?? 23.Ne7 Qe7 24.Nf6 Qf6 25.gf6 Kh8 26.Rg7+–)) 22...Rc8 (better 22...Nb6–+) 23.Bh3=+ Rc5 24.Bd7 Qd7 25.Ne7? (better 25.Ne4 Rd5 26.cd5–+) 25...Qe7–+ 26.Bf6 Qc7 (26...Qe6 27.Rb1 Rc7 28.Rb5–+) 27.Rc1 (27.Bd4 Rc6–+) 27...b5 28.Bd4 Rc6 (better 28...Rf5 29.Kf1–+) 29.c5? (29.Ne4 f5 30.gf6 Rc4 31.Rc4 Qc4 32.Nd6 Qc1 33.Ke2 Qa3 34.f7 Rf7 35.Nf7 Qa2 36.Kd3 Kf7 37.Rg5–+) 29...dc5 30.Be5 Qc8 Black intends b4 (better 30...Qd7 31.e4–+) 31.Ne4 c4 32.Nf6 Rf6! 33.gf6 (33.Bf6 Qc6 Combination; 33.gf6 Qc6 Combination) 33...b4 34.ab4 ab4 (34...Qc6 35.Ke2 (35.ba5?? Qh1 36.Kd2 Qh2 37.Kc3 Qg3–+) 35...ab4 36.Rd1–+) 35.e4 (35.Bd6 Qc6 36.Bf8 Qh1 37.Kf2 Qc1 38.Bb4 Qb2 39.Kf3 Qb4–+) 35...c3 36.Bd6 (36.Rd3–+) 36...Re8 (better 36...Qb7 37.Bf8 Qe4 38.Kd1 Qd5 39.Ke2 Qd2 40.Kf3 Qc1 41.Bb4–+) 37.Bb4 (37.Be5 Qc4 38.Rf3 Qe4 39.Kf2 Re5 40.fe5 Qd4 41.Kf1 Qd5–+) 37...Qc4 (better 37...Re4 38.Kf2 Rf4 39.Rf3 Rf3 40.Kf3 Qf5 41.Ke3 Qg5 42.Kd3 Qc1 43.Bc3 Qh6–+) 38.Bc3 (38.Rcc3 Qb4 39.Rge3–+) 38...Re4 (38...Qe4 39.Kf2 Qf4 40.Kg1 Qg3 41.Kf1 Qf3 42.Kg1 Re2 43.Bd4 Qg2) 39.Kf2 Qe2 (39...Re2 40.Kf1 Rd2 41.Kg1 Qc5 42.Kh1 Qh5 43.Kg1 Qh2 44.Kf1 Qf2) 40.Kg1–+ Rf4 41.Bd4 Qe8 (better 41...Qe6!? 42.Be5 Qb6 43.Kg2 Rf2 44.Kh1 Rc2 45.Rc2 Qb1 46.Rg1 Qc2–+) 42.Be5–/+ Re4 (better 42...Ra4–/+) 43.Bc3?? (better 43.Rgc3=+) 43...Re6 (better 43...Re3 44.Rg2 Rc3 45.Rc3 Qe1 46.Kh2 Qc3–+) 44.Rd3 Rc6 0–1. beatmeeasy (1935) – vaibhav2612 (1975), lichess.org, 2020.

4.Nf3 e5 5.g4 Ngf6 6.g5 Nd5 7.a3 b5 8.e4 Nf4 9.d3 (9.d4 Qc7=) 9...Ne6 (9...a5 10.Qd2=+) 10.a4 ba4 11.Ra4 Nb6 12.Ra2 Be7 13.Rg1 0–0 14.c4 Nf4 15.c5 (15.Nbd2 Qc7=) 15...dc5 16.bc5 Bc5 17.Ne5 Bb7 (17...Be6 A) 18.Nc6? Qc7 19.Ra7 Qc6 (19...Ra7?! 20.Na7 Qa7 21.Qd2–+) 20.Ra8 Bb4 (20...Qa8?! 21.Nd2–+) 21.Nd2 Ra8–+ (21...Qa8?! 22.Be5 Ng6 23.Bd4–+; 21...Na8?! 22.h5 Rd8 23.Rg3–+); B) 18.Ra6 Bb4 19.Nd2=+) 18.Qf3 Ng6 19.h5 Ne5 20.Be5 Bd4 21.Bd4 Qd4 22.Nd2 Nd7 23.Nc4 (23.Qe3 Qc3+=) 23...Ne5 24.Ne5 Qe5 25.Qe3 Qc3 (25...c5 26.g6=) 26.Ke2 (26.Qd2 Qd4+=) 26...c5 27.Bg2 a5 28.Rc1 Qd4 Black intends a4 (28...Qb3!? 29.Rac2 Rfd8+=) 29.Rc5 Qe3? (better 29...Qb4!?+–) 30.Ke3+– a4 31.Rc7 Bc8 32.e5 Ra5 33.f4 Be6 34.Ra3 Rb8 35.Be4 Bb3 36.Rb7 (36.d4!? h6+–) 36...Rb7 37.Bb7 Ra7 38.Be4 Rc7 39.Kd4 Kf8 (39...h6 40.g6+–) 40.f5 (40.Bh7!? Rc2+–) 40...Rc1 41.Bd5 Rb1 (better 41...Bd1+–) 42.Bb3 ab3 43.Kc3 (better 43.f6!? gf6 44.ef6 Re1 45.Ra8 Re8 46.Re8 Ke8+–) 43…b2 0–1. beatmeeasy (1905) – lahrech (1920), lichess.org, 2020.

3.h4 e5

4.Nf3 Nd7 5.c4 h6 6.Nc3 Ngf6 7.e4 Be7 8.a4 0–0 9.g3 Re8 10.Rg1 (10.Be2 Qb6–/+) 10...Nf8 11.Be2 Ng4 (11...Ne6 12.Kf1–/+) 12.Qb3 (12.a5!?–/+) 12...Qb6 13.Rf1 (13.Rg2 a5 14.b5 Ne6–/+) 13...Ne6 (13...a5!? 14.b5–+) 14.a5–/+ Qc7 15.Ng1? (better 15.Nd1!?–/+) 15...Nd4–+ 16.Qd1 Ne2 17.Qe2 f5 (better 17...Nh2!? 18.Qd3–+) 18.f3 Nf6 19.b5 (19.Qd3 fe4 20.fe4 Be6–+) 19...Be6 (19...Nh5 20.Qh2–+) 20.Kf2 Rad8 (20...f4 21.g4–+) 21.b6? (better 21.ef5 Bf5 22.Kg2–+) 21...ab6–+ 22.ab6 Qb6 23.Kg2 d5 (better 23...Ra8 24.d3 f4–+) 24.Rab1?? (24.ed5 A) 24...Qb2?! 25.Rfb1 Qc2 26.Rc1 Qc1 27.Rc1 cd5 28.Nb5= (worse 28.Qe5 Bd6 29.Qe1 Bf7=+); B) 24...cd5 25.cd5 Nd5–+ (25...Qb2?! 26.Rfb1 Qc2 27.Rc1 Qc1 28.Rc1 Nd5 29.Rb1=)) 24...Qc7 (better 24...de4 25.fe4 fe4 26.Ne4 Ne4 27.Qe4 Rd2 28.Kh1 Rb2 29.Qg6 Bc4 30.Rb2 Qb2 31.Qe8 Kh7 32.Rf3–+) 25.ef5? (better 25.cd5 cd5 26.Nb5–+) 25...Bf5 26.Rbc1 (26.Ra1 dc4 27.Qc4 Kh8–+) 26...d4 (better 26...Qb6!? 27.Ba1 Qa6 28.Bb2–+) 27.Ne4 Bd7 (better 27...Nh5!? 28.Kh2–+) 28.Nf6 Bf6 29.d3 b6 30.Ra1 (30.Nh3 Ra8–/+) 30...c5–+ 31.Ra3 (31.Nh3 b5 32.cb5 Bb5–+) 31...Bc6 (31...b5 32.cb5 Bb5 33.Qd2–+) 32.Rfa1 Ra8 (32...Rf8 33.Bc1–+) 33.Ra8–/+ Ba8 34.Kh2 (34.Nh3 Bc6–/+) 34...e4! 35.fe4 (35.de4 Bh4 Decoy; 35.fe4 Bh4 Combination) 35...Bh4 36.Qg4 Bg5 37.Nf3 Be3 38.Nh4 Bc6 39.Nf5 b5 (39...Rf8!?–/+) 40.Ra6=+ bc4?? (better 40...Bg5 41.cb5 Bb5=) 41.Ne3 (41.Rc6 h5 42.Qg6+– (42.Rc7?! hg4 43.dc4 Re4+–)) 41...de3?? (better 41...cd3 42.Rc6 Qc6–+) 42.Rc6!+– Qf7 (42...Qc6 43.Qg7 Mate attack) 43.Rh6 (43.Rf6 Qb7 44.Bc3+–) 43...Qf2= 44.Kh3 Qf1 45.Kh4?? (better 45.Kh2 Qf2 46.Kh3 Qb2 47.Rh8 Kh8 48.Qh5 Kg8 49.Qe8 Kh7 50.Qh5 Kg8 51.Qe8 Kh7 52.Qh5 Kg8 53.Qe8=) 45...Qf7 (better 45...Qh1 46.Qh3 Qh3 47.Kh3 gh6 48.dc4 Re4–+) 46.Rg6 Re7 47.Qc8 (better 47.Rg7 Qg7 48.Bg7 (48.Qg7?? Rg7 49.dc4 Re7–+) 48...Rg7 49.Qc8 Kf7 50.Qc5+–) 47…Kh7 (47...Kh7 48.Rg7 Qg7 49.Bg7 Rg7 50.Qc5 cd3 51.Qe3 Rd7+–). beatmeeasy (1895) – Cabelod (1925), lichess.org, 2020.

4.Nf3 f5 5.c4 Nf6 6.Nc3 Be6 7.e3 a5 8.Ng5 Bf7 9.Nf7 Kf7 10.ba5 Ra5 11.h5 h6 12.Bd3 Kg8? (12...Qd7 13.Be2+=) 13.Qb3 (13.Bf5 Qe7+–) 13...Qc7? (better 13...Qd7+=) 14.Bf5+– c5?? (better 14...Be7+–) 15.Be6 Kh7 (15...Qf7 16.Bf7 Kf7+–) 16.Qc2 e4 17.Ne4 Ne4 (17...Rg8 18.Nf6 Kh8 19.Qh7) 18.Qe4 g6 19.Qg6 (19.hg6) 1–0. beatmeeasy (1910) – Bossnov (1930), lichess.org, 2021.

4.Nf3 Bg4 5.Nh2 Be6 6.g3 Nf6 7.Bg2 Bd5 8.Bd5 Nd5 9.a3 a5 10.c4 Nf6 11.b5 Nbd7 12.bc6 bc6 13.Qa4 Qc7 14.Nc3 Nc5 15.Qc2 a4 16.e3 (16.Rb1 Be7=+) 16...e4–/+ 17.0–0 Nd3?? (17...d5 18.Ne2–/+) 18.g4?? (better 18.Ne4 Ne4 19.Qd3+–) 18...d5–/+ 19.g5 (19.Na4 Ra4 20.Bf6 Rc4–+) 19...Bd6 (19...Nb2?! 20.Qb2 Nd7 21.cd5=) 20.gf6 Bh2 21.Kg2 gf6 22.Rh1 (22.Kh1–+) 22...Rg8 23.Kf1 Be5 (23...Nf2 24.Ne4 de4 25.d4–+) 24.Bc1?? (24.Na4 Bb2 (24...Nb2?! 25.Nb2 Qd6 26.cd5–/+) 25.Nb2 Nf2 26.cd5 Nh1 27.Qe4 Qe5 28.Qe5 fe5 29.dc6 Ng3 30.Kf2 Ne4 31.Ke2 f5–+) 24...Ke7 (better 24...Qc8 25.cd5 Qa6–+) 25.cd5 Bc3 (25...Qc8 26.Ne4 Qg4 27.d6 Kd8 28.Bb2 Qe4 29.Be5 fe5 30.Rh2–+) 26.Qc3 1–0. beatmeeasy (1910) – f77ff1566 (1850), lichess.org, 2020.

2.Bb2 f5

3.a4 d5 4.Nf3 e6 5.b5 Nf6 6.e3 Bb4 7.Be2 0–0 8.0–0 Ba5 9.d3 Nbd7 10.Nd4 Re8 11.bc6 Nc5 12.cb7 Bb7 13.Nc3 a6 14.f4 Qd7 15.Bf3 Bc3 (better is 15...e5!? 16.fe5 Re5+=) 16.Bc3+– Na4 17.Bb4 Rac8 18.c4 Nc5 19.Ra5 Nd3 20.Qd3 dc4 21.Qc2 Nd5 22.Bd5 ed5 23.Nf5 Re4 24.Nd6 Qe7 (24...Re3 25.Nc8 Qc8+–) 25.Rb1 (25...Rd8 26.Ne4 Qe4 27.Qe4 de4 28.Bc3+–; 25.Nc8?! Qb4 26.Qb1 Qa5 27.Qb7 Qc5+/–) 1–0. Trkn – guest3203, ICC, 2004.

3.a4 e6 4.e3 Nf6 (4...Bb4?? 5.Bg7 Nf6 6.Bh8+–) 5.Nf3 (better 5.b5!?=) 5...Bb4–/+ 6.Be2 0–0 7.0–0 d5 (7...d6 8.c3 Ba5 9.Qb3–/+) 8.c4 (8.d4 Nbd7=+) 8...Ba5 (8...Nbd7 9.Qb3 Bd6 10.d4=+) 9.Qb3 (9.d4 Ne4=+) 9...Qb6 (9...Nbd7 10.d4=+) 10.Qc2 (10.Qb6 Bb6 11.Be5 Ba5=+) 10...Nbd7 (10...Na6 11.Be5=+) 11.d3 (11.Nc3 Qc7=+) 11...Re8 (11...Qc7 12.d4=+) 12.d4 h6 (12...Ne4 13.Nc3=+) 13.Nbd2 (13.Nc3 Qc7=) 13...Qd8 (13...Ne4 14.Rfb1=+) 14.Rfc1 (14.cd5 cd5 15.Nb3 Bb4=) 14...Bd2 (14...Ne4 15.Rab1=+) 15.Qd2 Ne4 16.Qc2 Ng5 17.Nd2 (17.Ng5 Qg5 18.Bd3 dc4 19.Bc4 Nf6=) 17...Nf6 (17...Qf6 18.a5=) 18.a5 a6 (18...Nge4 19.Nf3=) 19.f3 (19.Bc3 Nge4=) 19...Ngh7 (19...Nf7 20.Bd3=) 20.Bd3 (20.Bc3 Rb8+=) 20...g6 (20...Ng5 21.Bc3+=) 21.Bc3 Re7 (21...Ng5 22.Rab1+=) 22.Rab1 Rg7 (22...Rb8 23.Bb4 Re8 24.Qc3+=) 23.Nf1 (23.Rb2 Ng5+–) 23...Rb8 (23...Ng5 24.c5+=) 24.cd5 (24.Bd2 Nd7+–) 24...Nd5+= 25.Ba6 (25.Bd2 Qd6+=) 25...Nc3 26.Qc3 Ra8 27.Bc4 Qa5 28.Qb2 Qa3 29.Qb6 (29.Qf2 Ng5=) 29...Qa5 (29...Nf8 30.Rd1=) 30.Qb3 Nf8 31.Qd1 Qd8 32.Qb3 (32.Qe1 b6=) 32...Qe7 (32...f4 33.Ra1 (worse 33.ef4 Qd4 34.Qe3 Rd7–/+) 33...Ra1 34.Ra1=) 33.Ra1 Ra1 34.Ra1 Qc7 (34...b5 35.Be2=) 35.Rc1 (35.Ra8 Re7+=) 35...Kh7 (35...f4 36.Nd2=) 36.Ng3 (36.Qb4 Qe7 37.Qa5 Qd6=) 36...Qa5 (36...e5 37.Ne2=) 37.Qb2 Re7 38.Ra1 (38.f4 Nd7=) 38...Qd8 (38...Qc7 39.f4=) 39.Ra8 (39.f4 Nd7=) 39...b5 (39...Nd7 40.Bb3=) 40.Bb3 (40.Qb4 bc4 41.Rc8 Qc8 42.Qe7 Kg8=) 40...Rc7= 41.Qa3 (41.Qc3=) 41...Kg7 (41...f4!? 42.Ne2 fe3=+) 42.Ne2 (42.Qc5 Qf6+=) 42...g5 (42...c5!? 43.Ra7 Qd7 44.Rc7 Qc7 45.dc5 Qe5+=) 43.Qc5+= Nd7? (better 43...Qd7+=) 44.Qd6+– Rb7 (44...f4 45.ef4 c5 46.Be6 cd4 47.Nd4 (47.Qd4?! Qf6 48.Qd6 Rc2 49.fg5 hg5+–) 47...Rc1 48.Kf2+–) 45.Be6 (45.Qe6?! Nb6 46.Rc8 A) 46...Nc8? 47.Ng3 (47.Qf5?! Qf8 48.Qe5 Qf6+=) 47...Qf8 48.Nf5 Kh8 49.Nh6+–; B) 46...Qc8 47.Qe5 Kg6=; 45.Qc6?! Nb8 46.Qc5 Kh7+–) 45...Qf6 (45...f4 46.ef4 g4+–) 46.Rc8 Nf8 47.Qc6 (47.Ng3 Qe6 48.Qf8 Kg6 49.Nf5 Qc8 50.Qc8 Ra7 51.Qe6 Kh7 52.Qh6 Kg8 53.Qg5 Kf8+–) 47...Qe7 (47...Re7 48.Bd5 Qc6 49.Rc6+–) 48.Re8 (better 48.Ng3!? Qe6 49.Qb7 Kg8+–) 48...Qc7 49.Qc7 (49.d5 Ra7 50.Qc7 Rc7+–) 49...Rc7 50.Bf5 Rb7 51.Bc2 (51.Be4 Rb6+–) 51...b4 52.Bb3 Nd7 (52...Ng6 53.Kf2+–) 53.Re7 (better 53.Ng3 Nf6 54.Nf5 Kg6+–) 53...Kf6 (53...Kf8 54.Rh7+–) 54.Rf7 Kg6 55.g4 (better 55.f4 g4+–) 55...Ra7 (55...Nc5 56.Rb7 Nb7 57.Kf2+–) 56.Kf2 (better 56.Ng3 Ra1 57.Kf2 Ra7+–) 56...Ra3 57.Rd7 (57.Bc4 Nb6 58.Be6 Ra5+–) 57...Rb3 58.Rb7 (58.f4 gf4 59.Nf4 Kf6+–) 58...Rb2 59.Ke1 (59.f4 gf4 60.ef4 h5 61.Rb6 Kg7+–) 59...b3 (59...Rb3 60.Rb6 Kg7 61.Kd2+–) 60.Nc3 (60.Ng3 Kf6+–) 60...h5 (60...Rh2 61.Rb3 Kf7 62.e4+–) 61.Rb6 Kf7 (61...Kg7 62.gh5 Rh2 63.Rg6 Kf7 64.Rg5+–) 62.gh5 (better 62.Ne4 hg4 63.Ng5 Kf8 64.fg4 Rh2 65.Rb3 Rh4+–) 62...Kg7 (62...Rh2 63.Rb3 Rh5 64.Ne4+–) 63.Nd1 (better 63.h6 Kg8 64.Ne4 Rb1 65.Kf2 Ra1 66.Ng5 Ra8 67.Rg6 Kf8+–) 63...Rh2 64.Rb3 (64.Rg6 Kf7 65.Rg5 b2+–) 64...Kh6 (64...Rh5 65.e4+–) 65.Nf2 (65.Rb6 Kh7+–) 65...Kh5 (65...Rh5 66.e4+–) 66.Rb6 Rh4 Black prepares the advance g4 (66...Rg2+–) 67.Ng4 Rh1 68.Kf2 Rh2 69.Nh2 (69.Kg1 Rh1 70.Kh1 Kh4 71.Kg2 Kh5 72.Rh6) 69...g4 70.Ng4 (70.fg4 Kg5 71.Nf3 Kg4 72.Rb5 Kh3 73.Rh5 Kg4 74.Rg5 Kh3 75.Rg3) 70...Kh4 71.Rg6 (71.Rb5 Kh3 72.Rh5) 71...Kh5 72.Rg8 Kh4 73.f4 Kh5 74.Kf3 Kh4 75.Rh8 1–0. Gadaskin,Genadi – Pennig,Josef, Koblenz, 2000.

3.c4 Na6 4.a3+= Nc7 (4...Nf6 5.Nc3+= (5.Nf3 d6 6.d4 g6 7.Nc3 Bg7 8.e3) 5...e5 6.Nf3 d6 7.g3 Be7 8.Bg2) 5.Nf3 d6 (5...Nf6 6.Nc3 e6 7.Qb3 d5 8.e3) 6.Nc3 b6 (6...Nf6!?+= 7.d4 g6 8.e3) 7.e4 g6 (7...fe4 8.Ne4) 8.ef5 Bf5 9.Nd4 Nf6 10.Nf5 gf5 11.Bd3 e6 12.Qf3 Kd7 (12...Qd7 13.b5 c5 14.0–0+–) 13.b5+– d5 (better 13...cb5 14.Nb5 Nb5 15.cb5 d5 16.Bf5 Bd6+–) 14.bc6 Kc6 15.cd5 Ncd5 (15...ed5 16.0–0 Bc5 17.Bf5+– (17.Qf5?! Rf8 18.Qh3 Qe8+–)) 16.Nd5 Qd5 (16...ed5 17.Qf5 Be7 18.Ba6+–) 17.Qd5 ed5 (17...Kd5 18.Bf6 Rg8 19.0–0+–) 18.Bf6 Rg8 (18...Re8 19.Kf1 Rg8 20.Bf5+–) 19.0–0 Bc5 (19...Bg7 20.Rac1 Kd6 21.Bg7 Rg7 22.Rfe1+–) 20.Rfe1 (20.Bf5?! Rgf8+–) 20...Rg6 (20...Rae8 21.Bf5 h5 22.d4 Re1 23.Re1 Ba3 24.Re6 Kb7 25.Re5+–) 21.Re6 Kd7 (21...Kb7 22.Bf5 Rh6 23.d4+–) 22.Bf5 b5 (22...Rf8+–) 23.Rc1 Rc8 24.d4 Ba3 25.Re3 Kd6 26.Be7 1–0. Kret – Bresser, internet, 2020.

3.c4 e6 4.e3 d5 5.a4 Nf6 6.b5 (--> 1.b4 f5 2.Bb2 Nf6 3.c4 e6 4.b5 d5 5.e3 c6 6.a4).

3.c4 h5 4.e3 (4.Nc3 e6 5.a3 a5+–) 4...d6 (4...e6 5.Qb3+=) 5.Be2 e5 (5...Nf6!?+–) 6.Bh5+– Kd7 7.d4 e4 (7...Qg5!? 8.Be2 Qg2+–) 8.Nh3+– d5 9.0–0 (9.c5!? Na6 10.b5 cb5 11.Be2+–) 9...Nf6 10.Bg6 (10.Be2 dc4 11.Nc3 Bb4 12.Bc4 Kc7+–) 10...Kc7+= 11.c5 (11.Nc3 Rh6 12.Bf7 Qe7 13.Bd5 Nbd7=) 11...Ng4 12.Qa4 (12.Nc3!? Rh6 13.Bf7=) 12...Qf6=+ 13.Nf4?? (13.b5 Qg6 14.Nf4–/+) 13...Rh2–+ 14.g3 (14.Qc2 Rh6 15.Rc1–+) 14...Qg5 15.Qa5 (15.Rd1 Qh6 16.Bh5–+) 15...Kd7 (better 15...b6 16.cb6 Kb7–+) 16.Nd2 (16.Nc3 Be7 17.b5 Qh6 18.Bf5 Ke8 19.Bg6 Kf8 20.Ne4 de4 21.Be4 g5–+) 16...Qh6 (16...Rh6 17.Bf7 Ke7–+) 17.Bf5= Ke8 18.Bg6 (18.Bc8?? Rh1 19.Kg2 Qh2) 18...Ke7?? (better 18...Kd7 19.Ne4 de4 20.Be4 Na6=) 19.Qc7 Kf6 20.Qf7 (20.Qc8?? Rh1 21.Kg2 Qh2) 20...Kg5 21.Ne6 (21.Qf8?? Rh1 22.Kg2 Qh2) 21...Be6 22.f4 ef3 23.Nf3 1–0. DEFFM – GuestVPWR, freechess.org, 2019.

2.Bb2 f6

3.a3 e5 (--> 1.b4 e5 2.Bb2 f6 3.a3 c6).

3.Nc3 d5 4.e4 e6 (4...e5 5.ed5 cd5 6.Qh5 g6 7.Qf3=+) 5.a3 Bd6 (5...d4 6.Na2=) 6.Bd3 (6.d4 Ne7=) 6...Nh6 (6...d4 7.Na2=) 7.Qh5+= Nf7 8.ed5 (8.Nf3 g6 9.Qh4 Ng5 10.ed5 Nf3 11.gf3 0–0+=) 8...cd5 (better is 8...ed5 9.Nf3 Qe7 10.Be2 g6=) 9.Bh7 (9.Nf3 a5+=) 9...Nc6 (better is 9...Nd7!? 10.Qe2 Rh7 11.Qe6 Kf8 12.Qd5 Nb6–/+) 10.Nf3 (better is 10.Nb5 Bf4 11.Qg6+=) 10...e5 (better is 10...Ne7=) 11.Nd5+/– Nd4 12.Nd4 (12.Bd4 Bb4) 12...ed4 13.0–0 (13.c4 dc3 14.dc3 Kf8+/–) 13...Be5+/– 14.f4 Qd5 15.fe5 fe5 (15...Be6 16.Qg6 fe5 17.c3 dc3 18.Bc3+–) 16.Qg6 (16.Rf7!? Rh7 17.Qh7 Kf7 18.Rf1 Ke6+–) 16...Be6 17.Qg7 0–0–0 18.c4 Qc4?? (better is 18...Qd7 19.Rae1 Kb8+–) 19.Rac1 (19...Qc1 20.Bc1+–) 1–0. Wall,Bill – BlueSpike, internet, 2004.

3.Nc3 e5 4.a3=.

3.c4 b5 4.e4 bc4 5.Bc4 Nh6 (5...e6 6.a3+=) 6.Nf3 (6.Qh5 g6 7.Qf3 Ba6+=) 6...e5 7.a3 (better is 7.Qb3+=) 7...c5? (7...d5!? 8.ed5 cd5 9.Bb5 Bd7 10.Bd7 Nd7=) 8.0–0 (8.Ne5 Qc7 9.Qh5 Kd8 10.Nf7 Nf7 11.Qf7 Qf4+–) 8...Qc7 9.Qb3 (9.b5!?+/–) 9...Nc6+= 10.Bd5 cb4 11.ab4 Rb8 12.Bc6 (12.b5 a6=) 12...Qc6 (12...Rb4 13.Qe3 Rb2 14.Bd5=+) 13.Nc3 Rb4 14.Qc2 Re4?? (better is 14...Ba6 15.Rfc1 Nf7=) 15.Qe4+– Qb6 16.Rfb1 Bc5 17.d4 Bb4 18.de5 f5 19.Qc4 Bb7 20.Nd5 Bd5 21.Qd5 Ng4 22.Bd4 Qe6 23.Qe6 de6 24.Rb4 Kf7 25.Ra7 Kg6 26.h3 Nh6 27.Be3 Rd8 28.Nh4 Kh5 29.Rg7 Rd1 30.Kh2 Rd5 31.Rg5 1–0. Germanicus – JimDog, ChessWorld.net, 2005.

3.c4 e5 (--> 1.b4 e5 2.Bb2 f6 3.c4 c6).

3.c4 e6 4.a3 g5 (better is 4...a5!?=) 5.e4+/– h5 (5...Qe7 6.Qh5 Kd8 7.c5+/–) 6.Be2 g4 7.h3 gh3 (better is 7...Bh6!?+/–) 8.Bh5+– Ke7 9.Nh3 Bg7 (9...Bh6 10.Qg4+–) 10.Nf4 (better is 10.Qg4 Bh6 11.Nf4+–) 10...Rh6? (better is 10...Rh7+–) 11.Qg4 Qf8 12.Rh3 Kd6 (12...e5 13.Ng6 Rg6 14.Qg6+– (14.Bg6?! d5 15.Bf5 Nh6+–)) 13.Rg3 e5 14.Qg7 Qg7 15.Rg7 Ne7 (15...ef4 16.Rg8 Rh5 17.Rc8+–) 16.g4 ef4 17.c5 Ke6 (17...Kc7 18.Re7 b6+–) 18.Bf7# 1–0. pierre – The Cat, ChessWorld.net, 2005.

3.c4 Nh6 4.e4 d6 5.Nf3 Qd7 6.d4 Nf7 7.Nc3 b6 8.Bd3 Qe6 (8...e5 9.d5+/–) 9.0–0 Ba6 (9...Qd7 10.d5+/–) 10.Qb3 (10.d5 cd5 11.ed5 Qc8+–) 10...b5 (better is 10...Qg4!?+–) 11.d5 Qc8 (11...cd5 12.cb5 Bb7 13.Nd4+–) 12.cb5 Bb5 13.Nb5 cb5 14.Bb5 Kd8 (14...Nd7 15.Rac1 Qb7 16.Bc6+–) 15.Rac1 Qb7 16.Bc6 (16...Nc6 17.dc6+–) 1–0. Wall,Bill – WBM, Internet, 2003.

3.e3 b5 4.Bd3 (better is 4.a4+=) 4...Ba6?? (better is 4...Nh6+=) 5.Qh5 g6 6.Qg6!! (6...hg6 7.Bg6#) 1–0. Wall,Bill – Guest1298, Internet, 2003.

3.e3 d5 (--> 1.b4 c6 2.Bb2 d5 3.e3 f6).

3.e3 d6 4.f4 e5 5.Qh5 g6 6.Qf3 Bf5 7.e4 Be6 8.f5 gf5 9.ef5 Bd5 10.Qh5 Bf7 11.Qg4 h5 (11...Nh6 12.Qh3–/+) 12.Qe2 b5 (12...Ne7 13.Qf2–/+) 13.Nf3 (13.a4 ba4 14.d4 Ne7=) 13...Bc4 (13...a5!?=+) 14.d3 Bd5 (better is 14...Bf7=) 15.Qd2 (better is 15.a4!?+=) 15...Bh6 (15...a5 16.c4 Bf3 17.gf3=+) 16.Qe2 Qd7 (16...a5 17.c4 Bf7 18.cb5 ab4 19.a3=+) 17.Nh4 (17.Nc3 Qf5 18.Nd4 Qd7 19.Nd5 cd5=) 17...Ne7 18.g4?? (better is 18.c4 Bf7 19.Nc3=) 18...hg4 (better is 18...Bh1 19.gh5 a5 20.ba5–+) 19.Rg1? (19.Bg2 Bg5 20.Ng6 Bg2 21.Qg2 Ng6 22.fg6–+) 19...Rg8 (better is 19...Bg5 20.Ng6 Ng6 21.fg6 Bh4 22.Rg3 f5–+ (< 22...Bg3 23.hg3 a5 24.ba5–+)) 20.c4 (20.Rg4!? Bg5 21.Nc3 Nf5 22.Nd5 cd5 23.Nf3–/+) 20...bc4 21.dc4 Bf3?? (better is 21...Bf7 22.Rg4 Bg5–/+) 22.Nf3+/– gf3 23.Rg8 Ng8 24.Qf3 Ne7?? (better is 24...Qh7 25.Qh3 d5+/–) 25.Qh5+– Kd8 26.Qh6 Nf5 (26...Qf5 27.Qf8 Kd7 28.Nd2+–) 27.Qh8 (better is 27.Qf6 Ne7 28.c5 dc5 29.Be5+–) 27...Kc7 28.Qf6 Qc8 (28...Ne3 29.Na3 Nf1 30.Qf1 Qg4+–) 29.Nd2 (better is 29.Bh3 Qg8 30.Qf5 Qg1 31.Qf1 Qe3 32.Kd1 Na6+–) 29...Ne3 30.Qe7 (better is 30.Ne4 Qd8 31.Qd8 Kd8+–) 30...Qd7 31.Qd7 Nd7 32.Bd3 Ng2 33.Ke2 Rf8 34.Ne4 Nf4 35.Ke3 Rh8 36.Rh1 Rh3 37.Ng3 Ng2 (37...Nh5 38.Rf1+–) 38.Kf2 Nf4 39.Ke3 (39…Ng2 40.Kd2+–; better is 39.Bf5 Rh4 40.Kf3+–) 1–0. var – xuxan, Live Game Caissa's Web, 2004.

3.e3 e6 4.b5 c5 5.c4 b6 (5...d5 6.Bd3=) 6.Nf3 Bd6? (6...a6 7.Nc3+=) 7.Be2?? (7.Nh4!? a6 8.Qh5 Ke7 9.Ng6 hg6 10.Qh8 Qf8+–) 7...Ne7 (7...Bb7 8.d4+=) 8.0–0 (better is 8.Ng5! fg5 9.Bh5 Ng6 10.Qf3+/–) 8...0–0+= 9.d4 Qc7 10.h3 a6 11.a4 ab5 12.ab5 Ra1 13.Ba1 Qa7 (13...cd4 14.Qd4 Bc5 15.Qd3+=) 14.Bb2 Bb7 15.Nbd2 Nf5 (15...cd4 16.ed4 Ng6 17.Bd3+/–) 16.Bd3 Ne7? (16...cd4 17.ed4 (worse is 17.Bd4 Nd4 18.ed4 Qa3+=) 17...Bf3 18.Qf3+/– (18.gf3?! Bb4=)) 17.Ne4 (17.Qc2 Bf3 18.Bh7 Kh8 19.Nf3 cd4+–) 17...Bc7? (17...Be4 18.Be4 Qc7 19.Qd3+/–) 18.dc5?? (better is 18.Qc2 Be4 19.Be4+–) 18...bc5+= 19.Qc1 Bb6 20.Qa1+/– d5 21.Nd6 Ba8? 22.Qa7+– Ba7 23.Ra1 Bb6 24.Ra8 Nd7 25.Rf8 Kf8 26.Bh7 dc4 27.Be4 f5 28.Bc6 Nb8 29.Nc4 Bc7 30.Ng5 Kg8 31.Ne6 Nbc6 32.Nc7 Nb4 33.b6 Nec6 34.Ne5 Kf8 35.Nc6 Nc6 36.Ba3 Ke7 37.Bc5 Kd8 38.Ne6 Kc8 39.Ng7 Kb7 40.Nf5 Nb8 41.g4 Na6 42.Bd4 Kc6 43.g5 Kd7 44.h4 Ke8 45.h5 Kf7 46.g6 Kg8 47.h6 Nb8 48.h7 Kf8 49.h8Q 1–0. Kuehnel,Ann Kathrin – Loechtenboerger,Chantal, Niedersachsen–ch U16/18 Girls, 2006.

3.e3 h6?? 4.c4 (4.Qh5 g6 5.Qg6) 4...e6 5.b5 (5.Qh5 Ke7 6.d4+–) 5...c5 (5...Kf7 6.Bd3 Ne7 7.Qh5 g6 8.Qf3+=) 6.Nf3 (6.Qh5 Ke7 7.Qc5 d6 8.Qh5+–) 6...b6? (6...d5 7.d4+–) 7.Qc2 (better 7.Nh4 h5 8.Be2+–) 7...Qe7?? (better 7...Ne7+=) 8.Nh4+– f5 (8...g5 9.Ng6 Qg7 10.Qe4+–) 9.Ng6 Qg5 10.Nh8 Ne7 (10...h5 11.Be2 Bb7 12.Qd1 Qg2 13.Bh5 Kd8 14.Rf1+–) 11.Nc3 (11.h4 Qg4+–) 11...Bb7 (11...h5 12.Qe4! fe4 13.Ne4+–) 12.Ne2 (better 12.h4 Qg4 13.Ne2 Bg2+–) 12...Bg2 (12...h5+–) 13.Rg1 Be4 14.Qc3 (better 14.d3 Bd3 15.Qd3 Qh4+–) 14...Qf6 (14...Qh4 15.Rg7 d5 16.Ng6 Bg7 17.Qg7 Ng6 18.Bf6 Qf6 19.Qf6+–) 15.Qf6 gf6 16.Bf6 (better 16.Nf4 a6 17.Nh5 Kd8 18.Nf6 d6+–) 16...Kd8 (16...d6 17.Nf4 Nd7 18.Bc3+–) 17.Ng6 (better 17.Rg8 Ke8 18.Be7 Ke7+–) 17...Kc7 (17...Ke8 18.Nf8 Kf8+–) 18.Nf8 d6 19.Be7 Nd7 20.Ne6 Kb7 21.Bd6 Nf6 22.Rg7 Kc8 23.Be5 (better 23.Rc7 Kb8 24.Rc5 Kb7 25.Rc7 Kb8+–) 23...Ng4 24.Rg8 (better 24.Rc7 Kb8 25.Bf4 a6 26.Rc5 Ka7 27.Rc7 Kb8+–) 24...Kd7 25.Ra8 Ba8 26.N6f4 (better 26.Nf8 Ke7 27.Ng6 Kf7+–) 26...Ne5 27.Ng3 Ng4 28.Nf5 (28.h3 Ne5+–) 28...Nh2 29.Nh6 Bf3 30.Bg2 Bg4 31.Ng4 Ng4 32.Bf3 (better 32.Bh3 Ke8 33.Bg4 Kf7+–) 32...Ne5 33.Bd5 Kd6 34.Ke2 Ke7 35.Rg1 Kf6 36.Rh1 (better 36.Nh5 Ke7+–) 36...Kg7 37.Rh5 Nf7 38.Bf7 Kf7 39.Rh7 Kg8 40.Ra7 (40.Re7 Kf8 41.Ng6 Kg8 42.e4 a6 43.ba6 b5 44.a7 bc4 45.a8Q) 40...Kf8+– 41.Rb7 Ke8 42.Rb6 Kd7 43.Rc6 Kd8 44.a4 Kd7 (44...Ke7 45.Rc7 Kf6 46.b6 Kf5 47.b7 Kf6 48.b8Q Kf5 49.Rc5 Kg4 50.Qc8 Kh4 51.Rh5) 45.a5 (45.Nd5 Ke8 46.Rc7 Kd8 47.b6 Ke8 48.b7 Kd8 49.b8Q) 45...Kd8 46.a6 Kd7 47.a7 Kd8 48.a8Q Kd7 (48...Ke7 49.Qb7 Ke8 50.Rc8) 49.Qb7 Kd8 (49...Ke8 50.Rc8) 50.Rc8 1–0. AhmedSultanov – VirussXX, lichess.org, 2019.

3.e4 Qc7 4.Nf3 (4.a3 e5+=) 4...e5 5.Bc4 (5.a3 d5 6.ed5 cd5 7.Bb5 Nc6=) 5...b5 (5...Bb4 6.a3 Ba5 7.0–0=) 6.Bg8= Rg8 7.d4 (7.a3 a5=) 7...d6 (7...Bb4 8.c3 Be7 9.Qb3=+) 8.de5 (8.0–0 a5=) 8...de5=+ 9.0–0 (9.c3 a5=+) 9...Be7 (9...Bb4 10.Ba3 Ba3 11.Na3–/+) 10.Qe2 (10.a4 Be6 11.Bc3 c5 12.bc5 ba4=+) 10...Kf7 (10...Bb4 11.a4 a6 12.c4=+) 11.c4= a6 (11...Bb4 12.cb5 cb5 13.Rc1=) 12.cb5 (12.a3 Rd8=) 12...ab5 13.Nbd2 (13.a3 Rd8=) 13...Be6 (13...Bb4 14.a4 Bg4 15.ab5 Ra1 16.Ra1 Bd2 17.Qd2 Bf3 18.Qe3 Be4 19.Ra7 Qa7 20.Qa7 Ke6 21.f3+=) 14.a4? (14.a3 Rd8=) 14...Bd7 15.a5 Na6 16.Nh4 g6 17.Ba3 Bb4 18.Bb4=+ Nb4 19.Nb3 Rge8 20.Rfc1= Be6 21.Nc5 Na6 22.Ne6 Re6 23.f4? Rd6 24.fe5= fe5 25.Rf1 Kg7 26.Qg4 Nc5?? 27.Nf5+– Kf6?? 28.Nd6 Ke7 29.Rf7 Kd8 30.Rc7 Kc7+– 31.Nf7 Rd8 32.Ne5 Nd3 33.Rd1 Kb7 34.Nd3 Ka6 35.Nc5 Ka5 36.Rd8 Kb4 37.Qd1 Kc5 38.Rc8 Kb6 39.Qd6 (39...g5 40.Rb8 Ka7 41.Qc7 Ka6 42.Ra8#) 1–0. wach – zerz, Caissa.com, 2004.

3.e4 Nh6 4.Nc3 Nf7 5.Bc4 (5.Nf3!?+/–) 5...e6+= 6.a3 d5 7.ed5 (7.Bb3 a5 8.b5 de4 9.Ne4 cb5=) 7...cd5= 8.Bb3 a5 9.b5 (9.Qe2 ab4 10.ab4 Ra1 11.Ba1=) 9...a4 (better is 9...Bd6!?=) 10.Na4+= (10.Ba4? d4 11.Bb3 dc3 12.Bc3 Ra3–+) 10...e5 (10...Nd7 11.Qh5+=) 11.Nc3 (11.Ne2 Nd6 12.0–0 Nc4 13.Bc4 dc4+–) 11...Be6 (11...d4 12.Na4+/–) 12.Nf3 (12.Nge2!? Nd7 13.Bd5 Bd5 14.Nd5 Nc5+/–) 12...Qd7+/– 13.a4 Bb4 14.h3 (14.0–0 0–0+/–) 14...d4 (14...0–0 15.0–0+/–) 15.Be6 Qe6 16.Ne4 0–0 17.0–0 Nd7 18.c3 Ba5 (18...dc3!? 19.Bc3 Bc3 20.dc3 Rfd8+/–) 19.cd4+– Nb6 (19...Qd5 20.Re1+–) 20.Nc5 (20.de5!? fe5 21.Re1 Qd5+–) 20...Qd5 21.Qb3 Qb3 22.Nb3 e4 23.Nh2 (worse is 23.Na5 Ra5 24.Bc3 Ra4+=) 23...Nd6 (23...Nc4!? 24.Na5 Na5+/–) 24.Ba3+– Rfd8 25.Na5 (better is 25.Bd6!? Rd6 26.Rfc1+–) 25...Ra5+/– 26.Bb4 (better is 26.Bc5 Nd5 27.Bd6 Rd6 28.Rfe1+/–) 26...Ra7? (26...Ra4!? 27.Ra4 Na4+=) 27.Rfc1 (better is 27.Bc5 Ndc4 28.f3 Ra4 29.fe4+–) 27...Nf7?? (27...Ra4 28.Ra4 Na4 29.Bd6 Rd6 30.Rc4+/–) 28.Ng4 h5?? 29.Ne3 f5?? 30.Nf5 1–0. Matveenko,Yury (2110) – Gritsenko,Vladimir (2250), Voronezh City Chess Championship Open, 2009.

3.Nf3 d6 4.e4 g6 (4...e5 5.a3=) 5.Nh4 (5.a3 Bg7+=) 5...Bg7 6.d3 (6.d4 e5 7.Nf3 Bg4=) 6...g5 (6...e5 7.Nf3=) 7.Nf3 (7.Qh5 Kf8 8.Nf3 a5+=) 7...h5 (7...g4 8.Nfd2+=) 8.Nbd2 (8.Ng5 e5 9.Nf3 f5+–) 8...Bg4 (8...g4 9.Nh4+=) 9.Be2 Nd7 (9...e5 10.d4+–) 10.Nd4 Ne5?? (better 10...Be2 11.Qe2 Nf8+–) 11.Bg4+– Ng4 12.Ne6 Qc7 (12...Qb6 13.Bd4 (13.Ng7?! Kf7 14.d4 Kg7+–) 13...c5 14.Nc4+–) 13.Ng7 (better 13.Nc7 Kd7 14.Na8+–) 13...Kf7 14.Nf5 (14.Nh5!? Qd7 15.Ng3 Ke8+–) 14...e6 15.Ng3 N8h6 (15...Qb6 16.0–0+–) 16.Nf3 (16.Nh5 Ne5+–) 16...Rhe8 (16...h4 17.Ne2+–) 17.Qd2 (17.h3 Qb6 18.Bd4 Qb4 19.c3 Qa3 20.hg4 c5 21.Rh5 cd4 22.Rh6 Kg7+–) 17...Rad8 (17...h4 18.Nh5 Rh8 19.Ng5 fg5 20.Bh8+–) 18.Qc3 (18.Nh5 Rh8+–) 18...d5 (18...h4 19.Ne2 Ne5 20.Ne5 de5 21.0–0+–) 19.h3 (19.Nh5!? Qb6 20.Ng5 Ke7+–) 19...Ne5 20.Ne5 fe5 (20...Qe5 21.Qa3 Qd6 22.h4+–) 21.Qe5 (better 21.Nh5 d4 22.Qd2+–) 21...d4 (21...Qe5 22.Be5 Kg6+–) 22.Qc7 Kg6 23.Qb7 (23.h4 Nf7+–) 23...Nf7 24.Qc6 h4 25.Nf1 (25.Nf5 a5+–) 25...Ne5 26.Qc5 Nf7 27.Bd4 e5 28.Bb2 (28.Qc6 Kg7 29.Ne3 Nh6 30.Ba7 Re7+–) 28...Rc8 29.Qb5 (better 29.Qa7 Rc2 30.Qd7 Rcc8+–) 29...Rc2 30.Qe8 Rb2 31.Qe6 Kg7 32.Rc1 Rb4 33.Rc7 Rb1 34.Ke2 Rb2 35.Ke3 Rb7 (35...Re2 36.Ke2 Kh8 37.Qf7 g4 38.Qf8) 36.Qf7 Kh6 37.Qg7 (37.Rc6) 37...Kh5 38.f3 (38.Qh7) 38...Rc7 39.Qc7 (39.g4 hg3 40.Ng3 Kh4 41.Nf5 Kh5 42.Qh6) 39...Kg6 40.Qe5 (40.Ng3 hg3 41.Rc1 g4 42.Rc6 Kh5 43.Qe5 Kh4 44.Rh6) 40...Kh5 (40...Kh6 41.Qf6 Kh7 42.Ng3 hg3 43.Qf7 Kh6 44.Rc1 g4 45.Rc5 gh3 46.Rh5) 41.Qf5 (41.Qg7 a6 42.Qh7) 41…a6 (41...a6 42.Qh7; 41...Kh6 42.Qf7 g4 43.hg4 a5 44.Rh4 Kg5 45.Rh5) 0–1. alessandrocarvalhaes (1870) – teachingchessfornoob (1865), lichess.org, 2020.

3.Nf3 Kf7 4.e4 Ke6 (4...e5!?=) 5.d4+– Kd6 6.Bc4 Kc7 7.b5 Qe8 8.bc6 bc6 9.d5 (9.Qd2 Qh5 10.Nc3+–) 9...c5? (9...Qg6!? 10.0–0 Qe4+–) 10.e5 (10.Qd2 a5 11.Bc3 Bb7 12.Ba5 Kc8+–) 10...Ba6 (10...Kd8 11.0–0+–) 11.d6! Kd8 (11...ed6 12.Bg8 Combination) 12.Ba6?? (better 12.Qd2 ed6 13.Qa5 Ke7 14.ef6 Nf6 15.Ba6+–) 12...Na6+– 13.ef6 (13.de7 Ne7 14.0–0 Rb8+–) 13...Nf6 (better 13...ef6!? 14.Kf1 Rb8=+) 14.0–0 e6 (14...ed6 15.Re1 Qg6 16.Na3+=) 15.Nc3 g6?? (better 15...Rb8 16.Rb1 Rb6+–) 16.Nb5 Bg7 17.Re1 (better 17.Qd2 Qf8 18.Qa5 Ke8 19.Qa6 Kf7+–) 17...Rb8? (17...Qf8 18.Qd2 Nb4 19.Nc7+–) 18.a4 (18.Nc7 Nc7 19.dc7 Kc7 20.Be5 Kc6 21.Qd6 Kb7 22.Qc5 Ka8 23.Bb8 Qb8+–) 18...Qf7? (18...Qf8 19.Rb1 Nb4 20.Na7+–) 19.Rb1 (better 19.Ng5 Qf8 20.Re6+–) 19...Ke8?? (19...Nb4 20.Na7 Qf8 21.Nb5+–) 20.Na7 (20.Ng5 Qf8 21.Qf3 Kd8+–) 20...Kf8? (20...Ra8 21.Ng5 Qg8 22.Nb5+–) 21.Ne5 (better 21.Ng5 Qe8 22.Qf3 Rb2 23.Rb2+–) 21...Nd5?? (21...Qe8+–) 22.Nf7 Kf7 23.Qf3 Bf6 (23...Kg8 24.Bg7 Kg7 25.c3+–) 24.Nb5 (24.c4 Rb2 25.Rb2 Ndb4+–) 24...Nab4 (24...Rhf8 25.c4 Kg7 26.cd5 Bb2 27.Qg4+–) 25.c4 Kg7 26.cd5 Nd5 27.Bf6 Nf6 28.Qc3 Rhf8 29.Qc5 Rfc8 30.Qa3 (better 30.Nc7 Rb1 31.Rb1 Kf7+–) 30...Rc5 31.Rbc1 (31.Qc5 Kf8+–) 31...Rbc8 32.Rc5 Rc5 33.Qc5 1–0. alessandrocarvalhaes (1900) – Gibra (1730), lichess.org, 2019.

3.g3 e5 4.c3 d5= 5.d3 Be6 6.Nd2 Bd6 7.a4 Ne7 8.b5 (8.Ngf3=+) 8...c5 (better 8...0–0!?–/+) 9.c4 d4 (9...0–0 10.cd5 Bd5 11.Ngf3=) 10.e3 (10.Bg2 Qc7+=) 10...Nd7 (10...0–0 11.Bg2 Qc7 12.Ngf3=) 11.Bg2= Rb8 12.Ne4 Qc7 13.a5 f5 14.Ng5 (14.Nd6 Qd6 15.ed4 cd4+–) 14...Bg8= 15.b6 (15.a6!? ba6 16.Ra6=+) 15...ab6=+ 16.ab6 (better 16.N1h3!?=+) 16...Qb6–+ 17.Rb1 (17.Qc1!?–+) 17...Qa5 18.Kf1 h6 19.N5f3 g5 (19...b5!? 20.Qd2 Qd2 21.Nd2 bc4 22.dc4–+) 20.Nd2 (20.Ra1 Qb6 21.Rb1 Qc7–/+) 20...de3 21.fe3 Bf7 22.h4 g4 23.Nb3 (23.Ne2!?–/+) 23...Qc7–+ 24.Ne2 h5 (24...b5 25.Nd2–+) 25.Bc3 (25.Nc3!? 0–0 26.Nb5–/+) 25...0–0–+ 26.Ba5? (26.Kg1 Ng6 27.Bd2 f4 28.ef4 ef4 29.Nf4 Nf4 30.gf4 Bg6 31.Bd5 Kh7–+) 26...Qc8?? (better 26...b6 27.Bc3 f4 28.gf4 ef4 29.ef4 Bf4–+) 27.Nd2 b6 28.Bc3 Ng6 29.Kg1 Be6 Black prepares f4 30.e4?? (better 30.Ra1–/+) 30...f4–+ 31.gf4 (31.Bf1–+) 31...ef4 32.Bf1 (32.d4 f3 33.d5 fg2 34.Kg2 Bf7–+) 32...f3 33.Nc1 (33.d4 f2 34.Kg2–+) 33...g3 Black plans f2 (33...f2 34.Kg2 Qd8 35.Be2 Nh4 36.Kf1–+) 34.Bh3 (34.Nf3 Bg4 35.Be2–+) 34...f2 35.Kf1 Bh3 36.Rh3 Nde5 (better 36...Nf6 37.Rg3 Bg3–+) 37.Rh1 (37.Rg3 Ng4 38.e5 Be5 39.Be5–+) 37...Qg4 38.Qg4 Ng4 39.e5 (39.Be5 Be5 40.Rb6 Rb6 41.Ke2 g2 42.Ncb3 Nf4 43.Kd1 gh1Q 44.Nf1 Qf1 45.Kc2 Ne3 46.Kd2 Qe1) 39...Be5 (39...Nf4 40.ed6 g2) 40.Be5–+ N6e5 41.Ne2 (41.Kg2 Ne3 42.Kg3–+) 41…Ne3 0–1. beatmeeasy (1880) – Ludovico_Technique (1920), lichess.org, 2020.

3.e3 e5

4.a3 a5 5.b5 cb5 6.Bb5 g5? 7.Qh5+– Ke7 8.Nc3 Qe8?? (better is 8...Nc6 9.Nd5 Kd6+–) 9.Nd5 Kd8 10.Qe8 Ke8 11.Nc7 Kd8 12.Na8 Ne7 13.Nb6 Rg8 14.d4 d6 (14...Bg7 15.Bc4 Re8 16.de5 fe5 17.Nf3+–) 15.de5 de5 (15...fe5 16.Be5! Nd7 17.Bd7 de5 18.Bc8 Nc8 19.Rd1 Nd6+–) 16.0–0–0 Kc7 (16...Nd7 17.Nd7 Bd7 18.Rd7 Kc8+–) 17.Na8 1–0. Janek – Valery, internet, 2016.

4.a3 d5 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 c6).

3.e4 e5

(--> 1.b4 e5 2.Bb2 f6 3.e4 c6).

4.Bc4 Bb4 (--> 1.b4 e5 2.Bb2 f6 3.e4 Bb4 4.Bc4 c6).

4.Nf3 Bb4 5.Bc4 Ne7 (--> 1.b4 e5 2.Bb2 f6 3.e4 Bb4 4.Bc4 Ne7 5.Nf3 c6).

2.Nc3 d5

3.d4 Bf5 4.a3 e6 5.Nf3 Bd6 6.g3 Ne7 7.Bg2 0–0 8.0–0 a5 9.b5 Qb6 10.Rb1 a4 11.Nh4 c5 12.Nf5 Nf5 13.e4 de4 14.d5 Be5 15.Ne4 Rd8 16.Ng5 g6 (16...h6 17.Qe1 Bf6 18.Nf7 Kf7 19.Qe6 Qe6 20.de6 Ke6 21.Re1 Kf7 22.Bb7+=) 17.g4 (17.Qe2 Nd7+=) 17...Nh4 18.Qe2 Nd7 (18...Ng2? 19.Qe5 Nd7 20.Qg3 ed5 21.Kg2+–) 19.Rd1 (better is 19.de6!? fe6 20.Rd1 Ng2 21.Kg2+/–) 19...Ng2+= 20.de6 fe6 (20...Nf4 21.Bf4 Bf4 22.ef7 Kf8 23.Ne6 Kf7 24.Nd8 Rd8 25.Qc4 Qe6 26.Qf4 Kg8 27.Qa4 Rf8+–) 21.Kg2+– h6 22.Ne4 Qc7 23.Bh6+– Nb6? 24.Ng5 Rd1 25.Rd1 Nd5 26.Ne6 Qd6 27.Qe4 (27.Qe4 Qe6 28.Rd5+– (28.Qd5?! Re8+–)) 1–0. Taulien,Christian (2110) – Schiefer,Kim (2225), RSL4, 2006.

3.e3 e5 A) 4.a3+= A1) 4...Nf6 5.Bb2 (5.Nf3 Bd6 6.Bb2 a5 7.ba5 0–0 8.Be2 Qa5 9.0–0 Nbd7 10.Nh4–/+ –0.75) 5...Bd6 6.Be2 0–0 7.Nf3 a5 8.Na2 e4 9.Nd4 Qc7 10.h3+= –0.53; A2) 4...a5 5.b5 Nf6 6.Bb2 Bd6 7.bc6 bc6 8.Nf3 0–0 9.Be2 Nbd7 10.Rb1+= –0.59; A3) 4...Bd6 5.Be2 (5.Nf3 Nf6 6.Bb2 a5 7.ba5 Qa5 8.Be2 0–0 9.0–0 Qc7 10.h3–/+ –0.78) 5...Nf6 6.Bb2 0–0 7.Nf3 a5 8.Na2 Qc7 9.d3 Nbd7 10.c4–/+ –0.72; B) 4.b5 Nf6 5.Nf3 (5.Bb2 Bd6 6.Be2 c5 7.d4 cd4 8.ed4 e4 9.Qc1 Be6 10.Rb1–/+ –0.87) 5...e4 6.Ne5 Bd6 7.f4 0–0 8.Be2 Nbd7 9.Nd7 Bd7 10.Bb2+= –0.69.

3.e3 e6 4.Bd3 (4.a3 e5=) 4...Nf6 (4...Bb4 5.Nf3–/+) 5.Nf3 (5.a3=+) 5...c5 (better is 5...Bb4!? 6.Bb2 Nbd7–/+) 6.bc5= Be7 (6...Bc5 7.0–0=) 7.Bb5+= Nfd7 (7...Bd7!?+=) 8.d4+/– 0–0 9.0–0 Nc6 (9...Nf6 10.Qd3+/–) 10.e4 a6 (10...de4 11.Ne4 Nf6 12.Nf6 Bf6 13.c3+/–) 11.Bd3 e5 (11...de4 12.Ne4 Nb4+/–) 12.Nd5 (better is 12.ed5 Nd4 13.d6+–) 12...b5?? (better is 12...ed4 13.Ne7 Qe7+=) 13.Ne7 Qe7 14.Bg5?? Qe6?? 15.Ne5 f6?? 16.Nd7 Qd7 17.Bh4 Nd4 18.c3 Ne6+/– 19.a3 Rb8? 20.e5 Nf4 21.c6?? Qc6 22.Bc2?? Qg2 0–1. ajeffries – mspencer, net–chess.com, 2006.

3.e3 Bf5 4.g4 Bg6 (4...Bd7 5.Bb2+= (5.b5 e5 6.Rb1 h5 7.gh5 Nf6 8.bc6 Bc6 9.Bb5 Nbd7 10.Nge2+= –0.59) 5...e5 6.b5 Be6 7.Be2 d4 8.ed4 ed4 9.Ne4 Be7 10.Nf3+= –0.47) 5.h4 (5.Nf3 e6 (5...Nf6 6.Nh4 e5 7.a3 d4 8.ed4 Qd4 9.Nf3 Qg4 10.Ne5= –0.19) 6.a3 Bd6+= 7.Bb2 e5 8.Bg2 h5 9.Na4 Qe7 10.h3+= –0.69) 5...h6 (5...h5 6.g5+= e5 7.a3 Bd6 8.Bb2 Ne7 9.Bg2 b5 10.a4+= –0.53) 6.Nf3 e6 (6...Nd7 7.h5 Bh7 8.Bb2 Ngf6 9.Rg1 e5 10.a3+= –0.37) 7.Ne5 (7.a3 Bd6 (7...Nf6= 8.h5 Bh7 9.Rg1 Nbd7 10.Bb2+= –0.31) 8.d3 h5 9.g5 Ne7 10.e4+= –0.37; 7.b5 Bd6 8.h5 Bh7 9.bc6 bc6 10.Bb2+= –0.28) 7...Bh7 (7...Bb4 8.Ng6 fg6 9.Ne2 (9.Bb2–/+ e5 10.Bg2–/+ –0.81) 9...e5 10.Rb1–/+ –0.75) 8.a3 (8.b5 Bd6 9.f4 Be5 10.fe5+= –0.37) 8...Bd6 9.Nf3 (9.Nd3 Nf6 10.Bb2+= –0.53) 9...Nd7 (9...Nf6 10.g5+= –0.34) 10.Bb2 (10.d3+= –0.47) 10...f6 (10...e5 11.Bg2+=) 11.Nd4 e5 (11...Qe7 12.Rg1=) 12.Nf5 Bf5 13.gf5 Ne7 14.Qh5+= Kf8 15.Rg1 Qe8 16.Qg4 Qf7 17.d3 Rg8 18.h5 Ke8 19.Bg2 Kd8 20.b5 c5 21.Qf3+= Nb6 22.a4+/– Rc8 23.a5+– e4 24.Qd1 Nd7 25.de4 d4 26.ed4 Qc4 27.Ra4 Qf7 28.Bf3 c4 29.Be2 Ke8 30.Qa1 Kf8 31.a6 b6 32.Ba3 Bb8 33.Qa2 Re8 34.Bc4 Qh5 35.Bg8 Bh2 36.Rg6 Bf4 37.Qf7# 1–0. pierre – nathaniel_nate, internet, 2008.

3.e3 Nf6 4.Bb2 Qd6 5.a3 Ne4 6.f3 (6.Ne4 de4 7.Qh5 Qd5 8.Qd5 cd5+=) 6...Ng5 (6...Nc3 7.Bc3 e5 8.d4=) 7.h4 (7.f4 Ne6+=) 7...Qg3= 8.Ke2 Ne6 9.Rh3 (9.f4 d4 10.Ne4 Qg6=) 9...Qe5 (9...Qd6=+) 10.Na4 (better is 10.Ke1!?=) 10...d4–/+ 11.Ke1 Nf4 (better is 11...b5 12.Nc5 Nc5 13.Bd4 Qc7 14.Bc5 Bh3 15.Nh3 Nd7–/+) 12.Bd4+= Qf5? (better is 12...Qd6 13.Bc5 Qe5+=) 13.ef4+– Qe6? (13...Qd5 14.Be5 Bh3 15.Nh3+– (15.gh3?! e6+/–)) 14.Qe2 Qd6 15.Qe3 Bf5 16.Bd3 Na6 17.Bf5 g6 18.Bd3 Bh6 19.Bh8 f6 Black launches an attack 20.h5 g5 21.f5 Rd8 22.Rb1 Kd7 23.b5 Nc7 24.bc6 bc6 25.Nc5 Kc8 26.Rb7 Rh8 27.Qe6 Ne6=+ 28.fe6?? Qc5–+ 29.Rd7 Qg1 30.Bf1 f5 31.f4 g4 32.Rc3 Qb6 33.g3 c5?? 34.Bg2?? Qe6–+ 35.Kd1 Qd7 36.Rc5 Kb8 37.Bc6 Qe6 38.Bd5 Qd6 39.Rb5 Kc7 40.c4 Qa3 41.d3 Qd3 42.Kc1 e6 43.Rb7 Kd6 44.Bg2 Qc4 45.Kb2 Qe2 46.Kc3 Qg2 47.Rb2 Rc8 48.Kb3 Rb8 49.Ka4 Qb2 50.Ka5 Qb5 0–1. chessbarron – monkeyjizz, net–chess.com, 2005.

3.Nf3 d4 4.Ne4 Nf6 5.Nf6 (5.d3 Nbd7 (5...Bf5 6.Nf6 ef6 7.Qd2 Na6 8.a3 c5 9.Bb2 Qb6 10.g3 0–0–0; 5...Na6 6.a3 c5 7.Bd2 Ne4 8.de4 g6 9.c3 Bg7 10.cd4 cd4) 6.e3 a5 7.ed4 ab4 8.Be2 e6 9.0–0 Be7 10.Bf4 0–0; 5.Nc5 a5 6.Bb2 ab4 7.Nd3 Bf5 8.Bd4 Nbd7 9.g3 e6 10.Bg2 Bd6) 5...gf6 (5...ef6 6.a3= (6.Bb2 Bb4 7.Nd4 0–0 8.e3 Bd6 9.Be2 c5 10.Nb5 Nc6) 6...c5 7.Bb2 Nc6 8.b5 Ne5 9.e3 Bg4 10.h3 Nf3) 6.Bb2 e5 7.c3 dc3 8.dc3 Qd1 9.Rd1 Be6 10.a3 (10.e4 Rg8) 10...Nd7 11.e4 0–0–0 12.Be2 (12.Bc1 Bb3 13.Rd2 Be6=) 12...Be7 (12...Bb3 13.Rc1=) 13.Nh4 b6 (13...Nb6 14.Nf5 Bf5 15.ef5 Rd1 16.Kd1+=) 14.Nf5+= Bf5 15.ef5 Kc7 16.0–0 c5 (16...a5 17.Bh5+=) 17.Bc4+/– Rhf8 18.Rfe1 (18.Bc1 cb4 19.cb4 a5+/–) 18...Bd6 (18...cb4 19.cb4 a5 20.Bc3+/–) 19.Re3 Nb8 20.b5 a6 (20...Be7 21.Rde1+/–) 21.ba6+– Nc6 22.Rh3 Ne7 (better is 22...Be7 23.Rhd3 Bd6+–) 23.Rh7 Nf5 24.g4 Ne7 25.Bf7 Rh8 26.Rh8 Rh8 27.Be6 Ng6 (27...Nc6 28.Kg2+–) 28.Bf5 Nf4 29.Be4 Nh3 30.Kf1 Ng5 31.Bg2 e4 32.c4 Kb8 33.Bf6 Bh2 34.Bh8 Ka7 35.Bf6 Ne6 36.g5 Ka6 37.g6 Nf4 38.g7 Nh5 39.g8Q Nf6 40.Qa8 1–0. pierre – teqivid, internet, 2010.

3.Nf3 e5 4.Ne5 Bb4 5.Bb2 +=.

3.b5 d4

4.Ne4 e5 5.e3 Nf6 6.Nf6 Qf6 7.Bb2 Be6 (7...Bc5 8.Qf3 de3 9.de3=+) 8.ed4= ed4 9.Qf3 Qf3 10.Nf3 (worse 10.gf3 c5–/+) 10...c5 11.Ng5 (11.c3 dc3 12.dc3 Nd7=) 11...Bd5 12.c4 dc3 (12...Be7 13.cd5 Bg5 14.Kd1=+) 13.dc3+= Be7 (13...f6 14.c4 Bg8 15.Ne4=) 14.h4 (14.c4 Bg5 15.cd5 0–0+=) 14...h6 15.c4 hg5 16.cd5 Rh4 17.Rh4 gh4 18.Bg7 Nd7 19.Be2 (19.0–0–0 Bg5 20.Kc2 f6 21.Re1 Kf7=) 19...Bf6= 20.Bf6 Nf6 21.Rc1 b6 22.Rc4 0–0–0 23.Rf4 Nd5 24.Rf7 Nc3 (24...Re8 25.Kd2= (worse 25.Ra7 Kb8 26.Rd7 Nf4=+)) 25.Ra7+– Kb8 26.Re7 Nb5?? (better 26...Rd6 27.a3 Rd4+–) 27.Bb5+– (27.Bb5 Rd4 28.g3+–) 1–0. Pierre – Ondveel, internet, 2019.

4.Ne4 f5 5.Nc5 e5 6.Nb3 c5 7.Nc5?? (better 7.Ba3 c4 8.Bf8 Kf8 9.Nc1=+) 7...Bc5–+ 8.c4 (8.e3 Nf6–+) 8...Nf6 9.Bb2 Be6 10.Ba3 (10.e3–+) 10...Ba3 11.Qc1 (11.Nf3 Nbd7 12.e3 de3 13.fe3–+) 11…Bc1 (11...Bc1 12.Rc1 a6–+) 0–1. alt20 – osborj1, lichess.org, 2015.

3.Nf3 Nf6

4.a3 d4 5.Na2 Bg4=.

4.a3 h6 5.e3 Bf5 6.Be2 e6 7.Nd4 Bh7 8.0–0 Be7 9.f4 0–0 10.Bb2 Ne4 (10...a5 11.Ra2=) 11.Ne4+= Be4 (11...de4 12.Qe1+=) 12.f5 ef5? (better is 12...Bf5!? 13.Nf5 ef5 14.Rf5 Nd7+=) 13.d3+– (13.Nf5?! Bf5 14.Rf5 Nd7+=) 13...Bg2 (13...Nd7 14.de4 fe4 15.c4+–) 14.Kg2 g6 15.Qd2 Kh7 (15...Re8 16.Rf3+–) 16.Rf3 Bg5 17.c4 Qe7 (17...Re8 18.Rc1+–) 18.cd5 cd5 19.Qc3 Bf6 20.Rh3 (20.Rc1 Be5+–) 20...Qe5 (20...Be5 21.Qb3+–) 21.Rc1 1–0. pierre – zliq, internet, 2010.

4.e3 Bg4 5.h3 Bf3 6.Qf3=.

4.e3 g6 5.Ba3 (5.Be2 Bg7=) 5...Bg7 6.Bd3 (6.Bb2 Qd6=) 6...a6 (6...Qd6 7.Rb1+=) 7.0–0 (7.Bb2 Qd6=) 7...Bg4 (7...Qd6 8.Be2=) 8.h3 Bc8 (8...Bf3 9.Qf3 Nbd7 10.Bb2=) 9.Qb1 (9.Bb2 Qd6=) 9...0–0 10.Qb3 Re8 11.Rfe1 (11.Rae1 e5 12.e4 de4 13.Ne4 Ne4 14.Re4 Bf5=) 11...Nbd7 (11...b6 12.Bb2+=) 12.Bb2= e5 13.e4 d4 14.Ne2 Nh5 (14...Nb6 15.a4=) 15.c3 dc3 16.dc3 (16.Qc3 Nhf6=) 16...Nf4 (16...Nc5! 17.bc5 Qd3=) 17.Nf4+= ef4 18.Bc4 (18.c4 Ne5 19.Be5 Be5 20.Ne5 Re5+=) 18...Rf8 (18...Qf6 19.Rad1 b5 20.Bd3=) 19.e5+/– Nb6 20.e6 (20.Rad1 Qc7 21.Bc1+/–) 20...Nd5? (better is 20...fe6!? 21.Be6 Be6 22.Qe6 Kh8+=) 21.Bd5+– cd5?? (better is 21...Qd5 22.c4 Qf5+/–) 22.e7 Qe8 (22...Qd7 23.ef8R Bf8 24.c4+–) 23.Qd5 1–0. pierre – opponent, internet, 2008.

2.Nc3 e5

3.Rb1 d5=+ 4.e3 Nf6 5.Nf3 Bd6 6.d4 (6.Be2 e4 7.Nd4 Qc7=+) 6...e4–/+ 7.Ne5 Nbd7 8.Nd7 Bd7 (< 8...Kd7 9.b5=) 9.Be2 0–0 10.0–0 a5 (10...b5 11.a4–/+) 11.b5=+ h6 12.f3 (12.h3 Rb8=+) 12...Qc7 13.fe4 (13.f4 Bb4 14.b6 Qd6=) 13...Bh2–/+ 14.Kh1 de4 (14...Ne4!? 15.Ne4 de4–/+) 15.Rf6= gf6 16.Ne4 Bf5 (16...Kg7!?=) 17.Nf6+= Kh8 (17...Kg7 18.e4 Kf6 19.Qf1+/– (< 19.ef5 Bf4=)) 18.Bd3 (18.e4 Bg6 19.Qd2+– (19.Bh6?! Rfd8+/–)) 18...Bg6 (18...Bd3 19.Qd3 Kg7 20.Nh5 Kg8 21.Qf5+–) 19.Ng4 (19.e4 Rfd8+=) 19...Bg3 (19...Bd6 20.e4 h5 21.Nf6+/–) 20.Qf3 (20.bc6 Qc6 21.d5 Qd5 22.Bb2 f6 23.Bg6 Qg5+–) 20...f5 (20...cb5 21.Qf6 Kh7 22.Rb5+=) 21.Ne5 (21.Nh6!? Qh7 22.Qg3 Qh6 23.Kg1+/–) 21...Be5= 22.de5 Kg7 (22...Bf7 23.bc6 bc6 24.c4=) 23.e6 (23.bc6 bc6 24.e6 Rab8 25.Bb2 Kh7=) 23...c5 24.b6 (24.Bb2 Kh7+=) 24...Qe7 25.Bb2 Kh7 26.Qd5 (26.Kg1 Kg8=) 26...Rac8 (26...Rad8 27.Qe5=) 27.Rf1 Rc6 28.Rf5 Qh4 29.Kg1 Qe1 30.Kh2 Qh4 ½–½. Willen,Anders – Ritter, corr 3GMM–40, 1995.

3.Bb2 Bb4–/+ 4.e4 Nf6 5.Bc4 d5–+ 6.ed5 cd5 7.Nd5? Ne4?? 8.Qf3?? Bd2?? 9.Kd1?? f5 10.Qh5 Kf8?? 11.Ba3+– Kg8 12.Nf6# 1–0. interloper – gordiemac, ChessWorld.net, 2009.

3.Bb2 d6 4.Ne4 Nf6 5.Nf6 Qf6 6.Nf3 Nd7 7.e4 Qe7 8.d4 ed4 9.Qd4 Nf6 10.Be2 Bg4 11.h3 Bf3 12.Bf3 Qd8 13.0–0+/– Be7 14.e5 de5 15.Qe5 0–0 16.Qg3?? Re8 17.Rad1+= Qc8 18.Bc3 Rd8 19.Bd2 a5 20.Bh6 g6 21.a3 Rd1 22.Rd1= Bf8 23.Bg5 Bg7 24.Rd6 ab4 25.ab4 Ra1 26.Kh2 Qa8?? 27.Bf6+– Bf6 28.Rf6 Qe8 29.Qf4 Qe1 30.Rf7 Qh1 31.Kg3 Ra8 32.Qf6 Qe1 33.Qg7# 1–0. glo1 – Gary_Seven, ChessWorld.net, 2009.

3.e4 Nf6 4.Rb1 d5 5.ed5 cd5 6.Bd3 a6 7.Nf3 e4–+ 8.Nd4? ed3 9.cd3 Be7 10.0–0 Nc6 11.Nc6 bc6 12.d4 0–0 13.d3 Bb4 14.Ne2?? Bd6–+ 15.Bg5 Bh2! 16.Kh2 Ng4 17.Kg1 Qg5 18.Ng3 Qh6 19.Qg4 Bg4 20.Rbe1 Rfe8 21.Re8 Re8 22.Rb1 g6 23.f3 Qh4 24.fg4 Qg3 25.Rf1 Re1 26.Re1–+ Qe1 27.Kh2 Qe2 28.g5 Qd3 29.g3 Qd4 30.Kh3 Qd2 31.Kg4 Qa2 32.Kf4 Qe2 33.g4 d4 34.Kg3 d3 35.Kf4 d2 36.Kg3 d1Q 37.Kh3 Qdd3 38.Kh4 Qh2# (38...Qe1#) 0–1. interloper – leighcastle, ChessWorld.net, 2009.

3.Ne4 d5 4.Nc3 Bb4 5.d4?? Bc3 6.Bd2 Ba1 7.Qa1 e4 8.g3 Nf6 9.h3 0–0 10.f3 Be6 11.Bg5 Nbd7 12.Bf6 Qa5 13.c3 Nf6 14.e3 ef3 15.Nf3 Ne4 16.Ng5 Ng5 17.Bg2 Bf5 18.h4 Be4 19.hg5 Bg2 20.Rh7 Kh7 21.Qb1 Be4 22.Qb2 Rh8 23.Qb7 Qc3 24.Kf1 Bd3 25.Kf2 Qc2 26.Kf3 Qe2 27.Kf4 Qf2 28.Ke5 Qg3# 0–1. mookie10 – overrated, Live Game Caissa's Web, 2004.

3.f3 Bb4 4.Na4 Qh4 5.g3 Qg5 6.Nh3 Qh6 7.Rb1 c5 8.Ng1 d6–/+ 9.Bg2 Nd7 10.h3 Nb6 11.g4?? Na4–+ 12.a3 Ba5 13.Rb3 b6 14.Rd3 Ne7 15.Bf1 Ba6 16.Bg2 0–0 17.c3 Bd3 18.ed3 b5 19.Ne2 f5 20.Ng3 fg4 21.c4 gh3 22.Rh3 Qg6 23.cb5 Nb6 24.Rh4 Qd3 25.Bf1 Qg6 26.Rh1 Qg3 27.Ke2 Qf3 28.Ke1 Qd1 29.Kd1–+ d5 30.Bd3 e4 31.Bc2 Ng6 32.Bb3 Rf5 33.Re1 Raf8 34.Bb2 Rf2 35.Kc1 Bd2 36.Kb1 Be1 37.Bc1 Bc3 38.Bc2 Nc4 39.Bb3 R8f3 40.a4 Rf1 41.a5 Na5 42.Bc2 Bd2 43.Kb2 Bc1 44.Ka2 Ra3 45.Kb1 Nc4 46.b6 Bf4 47.Bd1 Rd1 48.Kc2 Rd2 49.Kb1 ab6 50.Kc1 Ra1# 0–1. evandebrake – valerypavlovich, net–chess.com, 2001.

3.Nf3 Qc7 4.e4 Bb4–/+ 5.Bc4 Nf6 6.Qe2 d5 7.ed5 Bc3 8.dc3 cd5 9.Bb5 Bd7 10.Ne5 Qc3 11.Kf1?? Qa1 (11...Qa1 12.Nd7 Kd8 13.Nf6 Qc1 (13...Qf6?! 14.Qd3–+; 13...gf6?! 14.Qd1–/+) 14.Qe1 Qe1 15.Ke1 gf6–+). conqueror – pierre, ChessWorld.net, 2006.

3.Nf3 Bd6 4.Ne4 Bc7 5.Bb2 d5 6.Ng3 Qe7 7.e3 Nf6 8.Be2 0–0 9.0–0 Re8 10.c3 Nbd7 11.Nf5 Qe6 12.Ng3 Nf8 13.Qc2 Ng6 14.c4= Qe7 15.cd5 Nd5 16.b5 c5 17.Bc4 Be6 18.Rac1 b6 19.a3 Rad8 20.Qb3 f6 21.h3 Kh8 22.d3 Qf7 23.Rfe1 Nge7 24.d4 cd4 25.ed4 +=. gtate (2780) – jvanmechelen (2630), net–chess.com, 2008.

3.a3 d5

4.Bb2 Nf6 5.d4 ed4 6.Qd4=+ Be7 (6...Bf5 7.Qe5 Be6 8.e4=+) 7.e3= 0–0 8.Nf3 c5 9.bc5 Nc6 10.Qd2 Bc5 11.Rd1 Qe7 12.Nd5 Nd5 13.Qd5 Ba3 14.Ba3 Qa3 15.Bd3 Qa5 (better is 15...Nb4!? 16.Qe5 Bg4=) 16.Qa5+/– Na5 17.Nd4 b6 18.0–0 (18.Rg1 Rd8=) 18...f5 (18...Be6 19.Ne6 fe6 20.Rd2+=) 19.Rfe1 g6 ½–½. Dopper,Johan – Van Antwerpen,G, corr H364, 1991.

4.Bb2 Nf6 5.d4 Nbd7 6.e3 (better is 6.de5!? Ne5 7.Nd5 cd5 8.Be5=) 6...Bd6–/+ 7.de5 Ne5 8.Nf3 Bg4 (8...Nf3!? 9.gf3 0–0–/+) 9.Be2+= Bf3 10.Bf3 (10.gf3!? 0–0 11.f4=) 10...Nc4–/+ 11.Bc1 Be5 12.Qd3 0–0 13.Rb1 b5 14.Ne2 a5 15.0–0 Qc7 16.g3 ab4 17.ab4 Bd6 18.Nd4 Ra4 19.c3 Ne5 20.Qd1 Nf3 21.Nf3 Ne4 22.Qd3 Ra2 23.Bb2 Be7 24.Nd4 Bf6 25.Nb5?? (better is 25.Qc2+=) 25...cb5–+ 26.Qd5 Qc4 27.Rfd1 Qd5 (27...Nc3?! 28.Qc4 bc4 29.Bc3 Bc3 30.Rbc1 Bb4 31.Rc4–+; worse is 27...Bc3 28.Qc4 bc4 29.Bc3 Nc3 30.b5 Nb1 31.Rb1–+) 28.Rd5 Rd8 (better is 28...Bc3 29.Rb5 Rb2 30.Rb2 Bb2 31.Kg2–+) 29.Rb5 (29.Rd8 Bd8 30.Rd1–+) 29...Nd2 30.Rc1 Rb2 1–0. Oliveira Jr,A Fernandes (1845) – Macedo,A Soares De (1865), 15th IRT da Academia Potiguar de Xadrez, 2015.

4.Bb2 Nf6 5.d4 e4 6.Na4 =+.

4.d4 ed4 5.Qd4 Nf6 =+.

3.Ba3 a5–/+

4.Qb1? ab4–+ 5.Bb4 c5 6.Ba3 Ra3 7.Nb5 Ra4 8.c3 d5 9.Qb3 Ra5 10.d4 Bd7 11.e3 c4 12.Nd6 Bd6 13.Qb7 Rb5 14.Qa7 Bc6 15.Nf3 Ra5 16.Qa5 Qa5 17.Rc1 Ba3 18.Rb1 Qc3 19.Nd2 Bc1 20.Rb8 Ke7 21.Ke2 Qd2 22.Kf3 Qd1 23.Kg3 Nh6 24.Rh8 Qg4# 0–1. Krahl,Wolfgang – Birzer,Lothar, DESC, 1998.

4.e4?? ab4–+ 5.Bb2 bc3 6.Bc3 d5 7.Be5 de4 8.Bc4 Nd7 9.d4 Qa5 10.Ke2 Ne5 11.de5 Qc3 12.Bb3 b6 13.f3 Bc5 14.Qd2 Ba6 15.Kd1 Qa1 16.Qc1 0–0–0 (16...0–0–0 17.Bd5 Rd5 18.Ke1 Qc1#) 0–1. Krahl,Wolfgang – Borst,John, C2.1998.0.00113, 1998.

3.e4 Bb4–/+

4.Bc4 Qa5 5.Qf3 Nh6 6.Qg3 0–0 7.Nf3? Bc3–+ 8.dc3 Qc3 9.Bd2 Qa1 10.Ke2 Qh1?? 11.Ne5 d5 12.ed5 Nd7 13.dc6 Ne5 14.cb7 Bg4 15.Ke3 Nc4 16.Kf4 Nd2 17.Ke3 Qe1 18.Kd3 Rfd8 19.Kc3 Ne4 20.Kb2 Qb4 21.Kc1 Rd1# 0–1. interloper – maftei, ChessWorld.net, 2009.

4.Nf3 f6 5.Bc4 Ne7 6.Bb2 d5 7.Bb3 Na6 8.Ba4? de4 9.Ne4 Bf5 10.Ng3 Qb6 11.0–0 0–0–0 12.Bb3 Bg4 13.d3 Nc5 14.h3 Nf5 15.hg4? Ng3–+ 16.fg3 Nb3 17.d4 Na1 18.Ba1 e4 19.Kh1 ef3 20.Rf3 h5 21.g5 fg5 22.Qf1 Rdf8 23.d5 Qc7 24.Qd3 Rf3 25.gf3 Qg3 26.Qf5 Kd8 27.Bg7 Qe1 28.Kg2 Re8 29.Qg5 Kc7 30.Qh5 Re2 (30...Re2 31.Kh3 Qh1 32.Kg4 Rg2 33.Kf4 Qh5 34.d6 Bd6 35.Ke3 Bc5 36.Kf4 Qg5 37.Ke4 Re2 38.Kd3 Qe3 39.Kc4 b5#) 0–1. Doeh,Cole Adam – Oleynichenko,Sergey, IECG, 1995.

3.Nf3 Bb4

4.Ne5 Bc3 5.dc3 Qa5 6.Qd4+= Ne7? (better is 6...c5 7.Qe3 Ne7+=) 7.Nc4+– Qd5 8.Nd6 Kf8 9.e4 Qe6 (9...Qd4 10.cd4 b6+–) 10.Bc4 Qg6 11.0–0 (11.Bf7 Qg2 12.Bh6 Ng8 13.Bg8 Qg6+–) 11...f6 12.Bf7 (12.Qd1!? h6+–) 12...Qg4 13.f3 Qh4 14.Ba3 b6? (14...c5 15.Qc5 Nbc6+–) 15.Nf5 Kf7 (15...Qf4 16.Ne7 (16.Be7 Kf7 17.Bd6 Qg5+–) 16...Kf7 17.Bd6+– (17.Nc8?! Rc8 18.Bd6 Qg5+/–)) 16.Nh4 (16.Ne7?! Ba6 17.Nf5 Qg5+=; 16.Be7?! Qg5 17.Bd6 Ba6+–) 1–0. b4player – oppo, internet, 2009.

4.Ne5 Bc3 5.dc3 d6 6.Nc4 d5 7.Ne3 Nf6–/+ 8.g3 0–0 9.Bg2=+ Re8 10.0–0 Na6 11.Qd4 Nc7 12.c4 Ne6 13.Qd2 Ne4 14.Qd3 Qf6 15.cd5=+ Qa1 16.de6 Be6 17.Qe4+= Qa2 18.Qb4 Qa6 19.Ba3 Red8 20.Bf3 Rd7 21.Ra1 Qb5 22.c4 Qg5 23.Qc3 Bh3 24.Bb2 Rad8 25.c5 a6 26.Be4 f6 27.Qb3 Kh8 28.Qc4 Re7 29.Qc2 Red7 30.Bd3 Re7 31.Bc1 Qe5 32.Ra4 h6 33.Bb2 Qc7 34.Bc3 Qd7 35.Rh4 Be6 36.Qa4 Kg8 37.Qe4 Kf8 38.Qh7 Qc7 39.Bf6! gf6 40.Qh6 Ke8 41.Qf6 1–0. gtate (2620) – martijn (2570), net–chess.com, 2007.

2.c4 a5

3.Qa4 b5 4.cb5 cb5 5.Qb5 Ba6 (5...Nc6!? 6.ba5 e5+=) 6.Qa5+/– Qc8 7.Nc3 Qb7?? (7...Nc6!? 8.Qg5 Nb4+=) 8.Qd5 (better is 8.b5+–) 8...Nf6 9.Qb7 Bb7 10.Nb5 (10.Bb2 Nc6 11.a3 e5+–) 10...Ra4 (10...Na6 11.Rb1+–) 11.a3+– Na6? (11...e5 12.Bb2 d6 13.d4+–) 12.Bb2 (12.Nc3 Nb4 13.Rb1 Nc2 14.Kd1 Ra7 15.Kc2 Bc8+–) 12...g6? (12...Nd5 13.Rc1 f5+–) 13.Rc1 Bg7 14.Nc7 Nc7 15.Rc7 Bc6 16.Rc8 1–0. dhub noire – kehrsam, ChessWorld.net, 2006.

3.Qa4 e5 4.b5 =+.

3.ba5 Nf6 4.Bb2 g6 5.Nf3 Bg7 6.e3 0–0 7.Be2 d5 8.0–0 Qa5 9.d4 Nbd7 10.cd5 Nd5 11.e4 Nf4 12.Nbd2 Ne2 13.Qe2 Nf6 14.Nb3 Qb6 15.Rfc1 Be6 16.Nc5 Bg4 (< 16...Ra2 17.Ra2 (17.Ne6? Rb2 18.Qc4 fe6–+) 17...Ba2 18.e5+/–; 16...Ba2 17.e5 Nd5 18.Nd7+=) 17.Rc2 Rfd8 18.h3 Bf3 19.Qf3 Nd7 20.Nb3 Ra4 21.Qf4 Rda8 22.Bc3 c5 23.dc5 Nc5 24.Bg7 Nb3 25.Rb1 Kg7 26.Rb3 Qd4 27.Rd2 Qe4 28.Qe4 ½–½. Loulou – Redmike, HCL–M449 playchess.de, 2003.

3.e3 ab4 4.d4 Qa5 5.Bb2 Na6 6.Nd2 Nf6 7.Ngf3 e6 8.Be2 Be7 9.0–0 0–0 10.Nb3 Qc7 11.Rc1 d5 12.cd5 ed5 13.h3 Ne4 14.Qd3 Bf5 15.Qc2 Ng3 0–1. gtate (1945) – rbeckett (2130), net–chess.com, 2005.

3.Qa4 e6

4.ba5 Ra5 5.Qb3 Nf6 6.Nc3 (6.d4 d5=) 6...Na6 7.Nf3 d5 8.cd5 ed5 9.e3 Be6 10.Nd4 Nc5 11.Qc2 Bc8 12.Bb2 Bd6 13.Be2 0–0 14.0–0 Nfe4 15.Bd3 (15.d3 Nc3 16.Bc3 Qh4+/–) 15...Qh4 (15...Nd3 16.Qd3 Qh4 17.Nf3–/+) 16.Nf3 Qh5 (16...Qg4 17.Be2 Qg6 18.d3–/+) 17.Ne4 Ne4 18.Be4 de4 19.Qe4 Bg4 20.h3 Bf5 (20...Bf3 21.Qf3 Qf3 22.gf3=) 21.Qh4 (21.Qd4!? Qh6 22.e4+=) 21...Qh4= 22.Nh4 Bd3 23.Rfc1 Rfa8 24.a3 (24.Rc3 Rd5=) 24...Ba3 25.Ba3 Ra3 26.Ra3 Ra3 27.Nf3 Kf8 28.Ne5 Ke7 29.Nd3 Rd3 30.Rc2 Kd6 (30...h6!?–/+) 31.Kf1= (31...b5 32.Ke2=+). fiddler – C_D_B7, chessHere.com, 2006.

4.b5= d5 5.e3 (5.Nf3 dc4 6.Qc4 Bd7=) 5...Nd7 (5...dc4 6.Nc3=) 6.bc6 bc6 7.Qc2 (7.Qc6 Rb8 8.Na3 Bb7=) 7...Ba6 (7...Rb8 8.d4=+) 8.Bb2 (8.d4 e5=) 8...Ngf6 9.Nf3 Rb8 10.Ne5 Qb6 (10...Qc7 11.f4=+) 11.Nd7 (11.Bc3 Rb7=+) 11...Nd7 (11...Qb2 12.Nf6 gf6 13.Qb2 Rb2 14.cd5 Bf1 15.Rf1 cd5 16.Ke2=+) 12.Ba3 (12.Bc3 e5=+) 12...Ba3 13.Na3 Qb4 (13...Qb2 14.Qb2 Rb2 15.d4=+) 14.Qc1 0–0 15.Rb1 (15.cd5 Bf1 16.Rf1 cd5–/+) 15...Qa3!? 16.Qa3 Rb1 17.Ke2 Ne5 (17...Bc4 18.d3 Ba6 19.Qa5 Rb2 20.Ke1 Rb1 21.Kd2=) 18.f4 Nc4 19.Qe7 Ne5 (better is 19...Rb2 20.Ke1 Ra2–+) 20.Kf2 Ng4 21.Kg3 Bf1 22.Qa3? Nf6 23.h4 Ne4 24.Kh2 Nd2 25.Qa5 Rb2 26.a4 Bg2! 27.Ra1 Be4 28.Kh3 Bf5 (29.Kg2 Nc4 30.Kf3 Be4 31.Kg3 Na5–+) 0–1. Hansen,Bjarne G – Hanison,Bernard, corr 3GMM–17, 1994.

3.ba5 Qa5

4.Bb2 (--> 1.b4 c6 2.Bb2 a5 3.ba5 Qa5 4.c4).

4.Nc3 Nf6 5.e4 Ne4–/+ 6.Qc2 Nc3–+ 7.dc3 Na6 8.Be3 g6 9.Bd4 e5–+ 10.Be3 Nc5 11.Nf3 d6 12.Be2 Bf5 13.Qc1 Nb3!! 14.ab3 Qa1 15.0–0 Qc1 16.Rc1 Ra2 17.Bd1 Bg7 18.Nh4 Bd3 19.g3 Kd7 20.Ng2 Rha8 21.Ne1 e4 22.Bd4 Bd4 23.cd4 Ra1 24.Nd3 ed3 (25.Ra1 Ra1–+) 0–1. Netto (1610) – Garfield85 (1895), internet, 2006.

3.ba5 e5

4.Bb2 Qa5 5.e3 Nf6 6.Nf3 d6 7.Be2 g6 8.0–0+= Bg7 9.d4 e4 10.Nfd2 0–0 11.Qb3 d5 12.f3 Na6 13.fe4+/– Ne4 14.Ne4 de4 15.Bc3 Qg5 16.Rf4 f5 17.c5 Kh8 18.Na3 Nc7= 19.Bc4 Rd8 20.Raf1 Ne6 21.R4f2 Qe3 22.Nc2 Nc5 23.Ne3 Nb3–/+ 24.Bb3 c5 25.Nd5 cd4 26.Bb2 e3 27.Re2= Bd7 28.Bc4?? Bc6 29.Nb6 Ra5 30.a4 Be4 31.Bb5 Rb5 32.ab5 Bd3 33.Ree1 Bf1 34.Kf1–+ f4 35.Nc4 g5 36.Rd1 d3–+ 37.Bg7 Kg7 38.Ke1 Kf6 39.Nb2 d2 40.Ke2 Rd5 41.b6 Kf5 (42.Nc4 Ke4–+) 0–1. Labahn,Wolfgang – Heuermann, 1.Espelkamper Schnel, 1988.

4.Bb2 Qa5 5.Be5 Qe5 6.d4 Bb4 7.Nd2 Qd4 8.e3 Bd2 (9.Ke2 Qb2–+) 0–1. fsakvador – pierre, ChessHere.com, 2006.

4.Bb2 Qa5 5.Nf3 d6=.

4.Bb2 d6 5.d4 ed4 6.Bd4 Qa5 7.Nd2=.

3.Bb2

3.Bb2 (--> 1.b4 c6 2.Bb2 a5 3.c4).

3.Bb2 Nf6 4.b5 (--> 1.b4 a5 2.b5 Nf6 3.c4 c6 4.Bb2).

3.Qb3 ab4=+

4.Qb4 Na6 5.Qb2 Nf6 =+. 4.Qb4 Na6 5.Qb3 e5 6.Bb2 Nc5 7.Qc2 =+.

4.Qb4 Na6 5.Qb3 Nf6 6.Bb2 g6 7.Nf3 Bg7 8.d4 0–0 9.Nbd2 d5 10.e3 Nc7 11.Be2 dc4 12.Bc4 Ncd5 13.0–0 Qc7 14.Rac1 Nb6 15.Bb5 Ra5 16.Rc5 Be6–/+ 17.Qc3 Rfa8 18.a3? Qc8?? 19.Bd3 Na4–/+ 20.Qb4?? Nc5–+ 21.dc5 Nd5 22.Qb3 Ne3! 23.Qb6 Nf1 24.Bg7 Kg7 25.Kf1 Ra3 26.Qb2 f6 27.Ng5 Bd5 28.Be4 Qd7 29.g3 Ra2 30.Qc3 h6 31.Bd5 hg5 32.Ba2 Ra2 33.Nf3 Qh3 34.Kg1 Qf5 35.Kg2 Rc2 36.Qe3 Qc5 37.Nd4 Qd5 38.Kh3 Qd7 39.Kg2 Rc4 40.Nf3 b5 41.Nd2 Rc2 42.Ne4 Qe6 43.Qd3 Rc4 44.Nd2 Ra4 45.h3 Qd5 46.Qd5 cd5 47.Nb3 b4 48.Nc5 Ra3 0–1. Steve20 – kehrsam, ChessWorld.net, 2006.

4.Qb4 Na6 5.Qc3 Nf6–/+ 6.Nf3 g6 7.d4 e5 (8.Nfd2 ed4 9.Qd4 Be7–/+) 0–1. Ramiz – Garfield85 (1905), internet, 2006.

4.Qb4 d5 5.Qb3 =+.

4.Qb4 e5 5.Qb2 d6 6.Nc3 –/+.

4.d4 Nf6 5.Nf3 e6 6.Bg5 d5 7.e3 Be7 8.cd5 ed5 9.Nbd2 (9.Bf6 Bf6 10.Qb4 Qe7=+) 9...Na6 10.Bd3 Bg4 11.h3 Bf3–/+ 12.Nf3 Nc7 13.0–0 Ra3 14.Qc2 Ne6 15.Rfb1 Ng5–/+ 16.Ng5 h6 17.Nf3 Qa8 18.Rb3 0–0 19.Nd2 Qa4 20.f3 Ra8 21.Rb2? Qc2–+ 22.Bc2 Re3 23.Kf2 Rea3 24.Nb3 Nd7 25.Ke2 Nb6 26.Bd3 Na4 27.Rc2 Nc3 28.Kf2 Ra2 0–1. Daveygravey36 – boa, ChessWorld.net, 2002.

3.b5

3.b5 (--> 1.b4 a5 2.b5 c6 3.c4).

3.b5 cb5 4.cb5 (--> 1.b4 a5 2.b5 c6 3.c4 cb5 4.cb5).

3.b5 cb5 4.cb5 d5 (--> 1.b4 a5 2.b5 c6 3.c4 d5 4.cd5 cd5).

3.b5 d5

4.a4 (--> 1.b4 a5 2.b5 c6 3.a4 d5 4.c4).

4.cd5 cd5 (--> 1.b4 a5 2.b5 c6 3.c4 d5 4.cd5 cd5).

4.e3 (--> 1.b4 c6 2.e3 a5 3.b5 d5 4.c4).

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

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

3.b5 e5

(--> 1.b4 a5 2.b5 c6 3.c4 e5).

4.Bb2 d6 5.e3 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 e5 5.c4 c6).

4.e3 d5 (--> 1.b4 c6 2.e3 a5 3.b5 d5 4.c4 e5).

3.b5 Nf6

(--> 1.b4 a5 2.b5 Nf6 3.c4 c6).

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

4.e3 e5 5.Bb2 d6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 e5 5.c4 c6).

4.e3 g6 5.Bb2 Bg7 6.Nf3 0–0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 a5 7.b5).

2.c4 a6

3.a4 e6 4.Bb2 f6 5.b5 ab5 6.ab5 Ra5 7.e3 (7.Ra5 Qa5 8.e4 d5=) 7...cb5= 8.cb5 (8.Ra5 Qa5 9.cb5=) 8...Qb6 (8...Ra1 9.Ba1 d5 10.d4=) 9.Nc3 (9.Qc2 Ne7 10.Ra5 Qa5+–) 9...Bb4 (9...Ra1 10.Ba1 d5 11.Bd3=) 10.Ra5 Ba5 11.Qh5 (better 11.Qg4 Kf7 12.Nf3+–) 11...Ke7? (11...g6 12.Qh4 d5 13.Bd3+–) 12.Nf3 (better 12.Ba3!? d6 13.Ne4+–) 12...g6+– 13.Qg4 d5? (13...Kf7+–) 14.Qd4?? (better 14.Nd5 ed5 15.Qc8+–) 14...Nd7 (14...Qd4 15.Nd4 Kf7 16.f4+=) 15.Ba3 (15.Qh4 Qd6+=) 15...Kf7 (15...Ke8+=) 16.Ng5! fg5?? (16...Ke8 17.Qb6 Nb6= (17...Bb6? 18.Ne6 Ne7 19.Nf4+–)) 17.Qh8+– Ndf6 18.Bb2 Bc3 (18...Qd6 19.Nd1 e5 20.Be2+–) 19.Bc3 (19.dc3?! Bd7 20.h4 g4+=) 19...Qd8 (19...Bd7 20.h4 g4 21.h5+–) 20.Bf6 (20.h4 gh4 21.Rh4 e5+–) 20...Qf6 21.Qh7 Kf8 (21...Qg7 22.Qg7 Kg7 23.d4+–) 22.Qc7 Ne7 23.Qc1 (better 23.d4 Qf5 24.f3+–) 23...Nf5 Black plans d4 (23...e5+–) 24.Qc8 Kg7 25.Qb7 Kh6 26.Be2 Qa1 27.Bd1 d4 (27...Qb2 28.Qd7 Ng7 29.h4+–) 28.Qc8 de3 29.Qf8 (29.fe3!? Qg7+–) 29...Kh7 30.fe3 (better 30.Qf7 Kh6 31.fe3 Qa8 32.Qe6 Qg2+–) 30...Ne3 (30...Qa7 31.Qc8 Qb6 32.Qd7 Kh6 33.g4 Ne3 34.de3 Qe3 35.Be2 Qc1 36.Qd1 Qc3 37.Kf2 Qc5 38.Kg2+–) 31.Qf7 Kh6 32.Qf3 (better 32.de3 Qa5 33.Kf2 g4+–) 32...Nf5 (32...Nd1 33.Qf8 Kh5 34.g4 Kg4 35.Rg1 Kh5 36.Qf3 Kh6 37.Qd1+–) 33.0–0 (33.Qh3 Nh4 34.0–0 Qd4 35.Rf2 e5+–) 33...Qa7 (33...Qd4 34.Qf2 Qb4 35.b6+–) 34.Kh1 (34.Qf2 Qa5+–) 34...Qc5 (34...Qb8 35.Qd3+–) 35.Be2 Nd4 (35...Kh7 36.Qb7 Ng7 37.Qd7+–) 36.Qh3 (36.Qf6 g4 37.b6 Qc8 38.Qd4 Qg8+–) 36...Kg7 37.Qe3 e5 (37...Qd5 38.Bc4 Qc5 39.Be6 Ne6 40.Qe6+–) 38.b6 Ne2 (38...e4+–) 39.Qe2 (39.Qc5 Nf4 40.Qe5 Kg8 41.b7 Ne6 42.b8Q Nf8 43.Rf8 Kh7 44.Qh8) 39...Qb6 40.Qe5 Kh6 (40...Qf6 41.Qf6 Kh7 42.Qf8 g4 43.Rf7) 41.Qe8 (41.Qh8) 41...Kh5 (41...Qd4+–) 42.Qh8 Kg4 43.Qh3 1–0. DEFFM – GuestMMDV, freechess.org, 2016.

3.a4 g6 4.Bb2 b5?? (better 4...Nf6=) 5.Bh8+– Nf6 (5...bc4 6.Nf3+–) 6.ab5 ab5 (6...cb5 7.cb5 Nd5+–) 7.Ra8 Na6 (7...Bb7 8.Ra5 bc4 9.Ra4+–) 8.cb5 cb5 (8...Nc7 9.Rb8 Nb5 10.Nc3+–) 9.Qb3 Bb7 10.Rd8 Kd8 11.Qf7 Nb4 12.Bf6 ef6 13.Qf8 Kc7 14.Qb4 f5 15.Na3 g5 16.Nb5 Kb6 17.e3 g4 (17...Bf3 18.Qd4 Kc6 19.Qd6 Kb7 20.Qc7 Ka8 21.Qc8) 18.d4 (18.Qd6 Bc6 19.Qd4 Ka5 20.Qa7 Kb4 21.Qa3) 18...h5 (18...d6 19.Qd6 Ka5 20.Qa3 Kb6 21.Qc5 Ka5 22.Nc3) 19.Qc5 Ka6 (19...Ka5 20.Nc3) 20.Nd6 1–0. DEFFM – GuestWKJP, freechess.org, 2017.

3.Bb2 b5 4.c5 Bb7 5.e3 e6 6.d4 h6 7.Nf3 g5 (better is 7...a5!? 8.a4 ab4 9.ab5 Ra1 10.Ba1 cb5=) 8.d5+– Rh7 9.d6 a5 10.a3 ab4 11.ab4 Na6 12.Bd3 g4?? (12...f5 13.Qb3 Nf6 14.Nc3+–) 13.Nfd2 (better is 13.Bh7 Nf6 14.Bf6 Qf6 15.Nd4+–) 13...f5+/– 14.Bc3 (better is 14.Qb3!? Rf7 15.e4+/–) 14...Bg7+= 15.Qb3 Bc3 16.Qc3 (worse is 16.Nc3 Nc5 17.bc5 Ra1 18.Ndb1 Nf6–+) 16...Rb8? (better is 16...Qf6=) 17.e4+– f4 18.e5 Rf7? 19.Bg6 Nc7 20.Bf7 Kf7 21.dc7 Qc7 22.Na3 h5 23.Nc2 h4 24.Qd4 g3 25.Qf4 Ke7 26.hg3 hg3 27.Rh7 Kd8 28.Qf8 1–0. Fournier,Frederic – NN, jeu.europe–echecs.com, 2013.

3.Bb2 b6 4.e3 Qc7 (4...Nf6 5.Nf3=) 5.Nf3+= h6 (5...Nf6 6.Be2+=) 6.Be2 d6 7.d4 Bg4 8.0–0 Nd7 9.a4 e5 10.Nbd2 Be7 11.h3 Bh5 12.b5 ab5 13.ab5 Ra1 14.Qa1 d5 (better 14...cb5!? 15.cb5 Ngf6+–) 15.de5 Bf3 (15...dc4 16.Qa8 Nb8 17.Nc4+–) 16.Nf3 (worse 16.Bf3 cb5 17.cd5 Qc2+–) 16...f6 (16...Nb8+–) 17.Qa8 Nb8 18.bc6 1–0. DEFFM – shablooo, freechess.org, 2018.

3.Bb2 d6 4.e3 e5 5.Nc3 d5 6.cd5 Bb4 7.Qb3 (7.Nf3 f6=) 7...c5 (7...Bd6!?=) 8.a3+= Ba5 9.Ne4 Qh4?? (better 9...Nf6 10.Nc5 Nbd7 11.Nd7 Nd7+=) 10.Qa4 Bd7 (10...Ke7 11.Nf3 Bd2 12.Kd2 Qh6 13.d6 Kf8 14.Ne5 Qh4 15.Nf7 b5 16.Bb5 ab5 17.Qa8 Kf7+–) 11.Nd6 (11.Qa5?! Qe4 12.Qc5 f6+–) 11...Ke7 12.Qh4 Kd6 13.Qg3 Kc7 14.Be5 Kc8 15.Qg7 Ne7 16.Qh8 (16.Qh8 Bd8 17.Bf6+–) 1–0. DEFFM – GuestQPXB, freechess.org, 2018.

3.Bb2 f6 4.e4 (4.Nc3!?+–) 4...e5+= 5.c5 (better 5.a3+=) 5...g5?? (better 5...a5 6.a3 d6=) 6.Qh5+– Ke7 7.h4 (7.d4 ed4 8.Bd4 Qe8+–) 7...Qe8 8.hg5 Qh5 9.Rh5 fg5?? (9...Kf7 10.Nf3 d6+–) 10.Rg5 d5 (10...Nh6 11.Bc4 b5 12.Bb3+–) 11.cd6! Kd6 (11...Ke8 12.Be5 h6 13.Rg3+–) 12.Be5 Ke6 (12...Ke7 13.Bh8 Be6 14.Nf3+–) 13.Bh8 b5 (13...Nh6 14.Rh5+–) 14.Rg8 Nd7 15.Nf3 (better 15.Bc3 c5 16.Nf3 Bb7 17.Ng5 Kd6 18.e5 Kc6+–) 15...Bb7 16.Ng5 Ke7 17.Nh7 (better 17.Bd4 h6 18.Nh7 c5 19.bc5 Be4 20.Nf8 Rf8 21.Rg7 Kd8+–) 17...Bh6 18.Ra8 Ba8 19.a4 ba4 20.Ra4 Bb7 21.Ba6 Ba8 22.Bc8 Nb6 23.Ra7 Kd8 24.Be6 Nc4 (24...Bg7 25.Bg7 Bb7 26.Rb7 Nd7 27.Rd7 Kc8 28.Ra7 Kb8 29.Rf7 Ka8 30.Be5 c5 31.Bd5) 25.Bf6 Ke8 1–0. DEFFM – GuestLDQH, freechess.org, 2020.

3.d4 e5 4.a3 ed4 5.Qd4 d5=.

3.Bb2 d5

4.a4 dc4 5.e3 Bf5 6.Bc4 e6 7.Nf3 Nd7 8.0–0 Ngf6 9.b5 ab5 10.ab5 Ra1 11.Ba1 Be4 (11...c5!?=) 12.Nc3 Bg6 13.Ng5 (13.bc6 bc6 14.Qa4 Qc8+=) 13...h6 (13...Bd6=) 14.Ne6 (better 14.bc6!? bc6 15.Nf3=) 14...fe6–/+ 15.bc6 bc6 16.Be6 Qe7 (16...Nc5 17.Ba2=+) 17.Ba2=+ Bf7 (17...Bd3 18.Re1=+) 18.Qa4= Ba2 19.Qa8? (better 19.Qa2!? Qd6 20.Rb1=) 19...Qd8 (better 19...Kf7!? 20.Qa2 Qe6 21.Qe6 Ke6–/+) 20.Qa2 1–0. GuestZZTV – GuestSCDF, freechess.org, 2019.

4.cd5 cd5= 5.a4 (5.e3 Nc6=) 5...e6 6.b5 ab5 7.ab5 Ra1 8.Ba1 Bd7 (8...Nf6!?=+) 9.e3= Qa5 (9...Bc8 10.d4=) 10.Bc3 (better 10.Be5 Qa8 11.Nc3+–) 10...Bb4?? (better 10...Qc7+=) 11.Bg7+– Bb5 12.Bb5 Qb5 13.Bh8 f6 (13...Nd7 14.Ne2+–) 14.Qh5 (14.Qh5 Kf8 15.Qg4+–) 1–0. GuestKLVM – GuestBSTW, freechess.org, 2019.

3.Bb2 e6

4.a4 Nf6 5.b5 cb5 6.ab5 Be7 7.e3 0–0 8.Nf3 d6 9.Be2 Nbd7 10.0–0 Nb6 11.Nc3 ab5 (11...a5 12.Qc2+=) 12.Ra8+– Na8 13.Nb5 b6 (13...Nc7 14.Nc3+–) 14.Qb1 Nc7 15.Na7 Bb7 16.Bf6 Bf6 17.Qb6 Qb8?? (better 17...Ba8+–) 18.Rb1+– Na6 (18...e5 19.Qb7 Qb7 20.Rb7+–) 19.Qb7 Qb7 20.Rb7 Nc5 21.Rb6 d5 (21...Ne4 22.Nb5 Rd8 23.d4+–) 22.cd5 ed5 23.Rb5 Be7 (23...Ne4 24.Rd5 g6 25.Bd3+–) 24.d4 Ra8 (24...Ne4 25.Nc6 Bf6+–) 25.Nc6 Bd6 (25...Bf6 26.Rc5 Kf8 27.Rd5+–) 26.dc5 (26.dc5 Bf8 27.Ncd4+–) 1–0. DEFFM – GuestQQRZ, freechess.org, 2019.

4.e3 b5 5.a4 (5.Nf3 Nf6+=) 5...Bb7 (5...bc4!? 6.Bc4 Nf6=) 6.ab5+= ab5 7.Ra8 Ba8 8.cb5 cb5 9.Nf3 (9.Bb5?? Bg2 10.Bg7 Bg7–+ (10...Bh1?! 11.Bh8 Qg5 12.Bf1 Qg1 13.b5–+)) 9...Bc6 10.Na3 Qb6 11.Nd4 The pressure on the isolated pawn grows 11...Qb7 (11...Nf6 12.Nab5 Bb4 13.Qa4+=) 12.Nab5 (12.Nc6 Nc6 13.Nb5 Nf6+–) 12...Bb5 (12...Bg2!? 13.Bg2 Qg2+=) 13.Nb5+– f6? (better 13...Nf6!?+–) 14.Qh5 g6 15.Qh4 Bg7?? (15...Kf7+–) 16.Nd6 White plans b5 16...Ke7 17.Nb7 Nc6 18.b5 Nd8 19.Qb4 (19.Qb4 Ke8 20.Nd6 Kf8 21.Ba3 Nb7 22.Nb7 Kf7 23.Nd6 Kf8 24.Nf5 Kf7 25.Ng7 d6 26.Qd6 g5 27.Qf8 Kg6 28.Qe8 Kh6 29.Bf8 Ne7 30.Qh5) 1–0. DEFFM – Vitejvpekle, freechess.org, 2019.

4.e3 Nf6 5.a3=.

3.Bb2 Nf6

4.e3 Qb6 5.a3 c5 (5...d6 6.d4=) 6.Nc3 (6.bc5 Qc5 7.d4 Qa5 8.Bc3 Qc7+=) 6...cb4= 7.Na4 Qa5 (7...Qc7 8.ab4 Nc6 9.b5 ab5 10.cb5=) 8.c5 (8.ab4!? Qc7 9.c5+/–) 8...Nc6= 9.ab4 Nb4 (9...Qb4 10.Bc3 Qe4 11.Nb6=) 10.Bc4 (10.Bc3 Rb8 11.Qb3 Nfd5 12.Qd5 Qa4 (12...Nd5?? 13.Ba5 g5 14.d4+–) 13.Qf7 Kf7 14.Ra4 Nc6+=) 10...Qd8?? (better is 10...d5!? 11.Be2 Ra7=) 11.Qb3 (better is 11.Nb6 Rb8 12.Qb3+– (12.Nc8?! Qc8 13.Qb3 Qc5+=)) 11...a5?? (better is 11...d5!? 12.cd6 Qd6 13.Bf7 Kd8+=) 12.Nb6 (12.Bf7) 12...Ra7?? (better is 12...d5 13.Bb5 Bd7+–) 13.Bf7 1–0. nogumo – MichaelKnopf, mySchach.de, 2005.

4.e3 d5 5.c5=.

4.e3 e6 5.a3 d5 6.Nf3 (6.c5 a5=) 6...a5 (6...dc4 7.Bc4 b5 8.Be2=) 7.b5 Bd7 (7...Bd6 8.Be5=) 8.Nc3 a4 (8...Bd6 9.bc6 Nc6 10.Nb5=) 9.Be2 (9.cd5 ed5 10.bc6 Bc6+=) 9...Be7 (9...dc4 10.Bc4 Bd6 A) 11.Na4? cb5 12.Be6 Be6–+ (worse 12...Ra4 13.Bb3–+); B) 11.0–0=) 10.d3 (10.cd5 Nd5 11.Na4 0–0+=) 10...Qa5 11.0–0 (11.bc6 Nc6 12.d4 0–0=) 11...dc4 (11...cb5 12.cd5 ed5 13.Ne5=+) 12.dc4+= 0–0 13.Qc2 (13.Rc1 Rc8+=) 13...Rd8 (13...cb5 14.cb5 Rc8 15.Qd3+=) 14.Rfd1 Be8 (14...Ra7 15.Bd3+–) 15.Rd8+– Bd8 16.Rd1 Nbd7 (16...Be7 17.Bd3+–) 17.Ne4 (17.e4 Bb6+–) 17...Ne4 18.Qe4 Nf6 19.Qc2 (19.Qe5!?+–) 19...cb5= 20.cb5 (20.Bc3 Qc7 21.Ng5= (worse 21.cb5 Nd5 22.Rd5 ed5–/+)) 20...Bb5=+ 21.Bb5 (21.Bc3 Qa6 22.Bb5 Qb5=+) 21...Qb5 22.Bd4 (22.Rc1 Qd5=+) 22...Be7 (22...Qb3 23.Qb3 ab3 24.Rd3 Ra3 25.Bb2–/+) 23.Rb1 Qc6 24.Qb2 b5 25.h3 h6 26.Qb5 (26.Ne5!? Qe8 27.Rc1=+) 26...Qb5–+ 27.Rb5 Ba3 28.Ne5 (28.Bf6 gf6 29.Kf1 Bd6–+) 28...Be7 (28...Ne4 29.Kf1–+) 29.Rb7 Bf8 (29...Kf8 30.Nc6 Bd6 31.Na7–+) 30.Rf7 (30.Nf7!? a3 31.Nh6 gh6 32.Bf6–/+) 30...a3–/+ 31.Ng6?? (better 31.Ra7 Ra7 32.Ba7–+) 31…Kf7–+ (31...Kf7 32.Nf8 Kf8–+) 0–1. GuestWRRM – GuestFWTF, freechess.org, 2016.

4.Nf3 d5 5.c5 a5=.

4.Nf3 d6=.

2.c4 Na6

3.a3 b6 4.Bb2 e6 5.e3 Qh4 (5...Nf6!?=) 6.Nf3+/– Qc4?? (better is 6...Qd8+/–) 7.Bc4+– d5 (7...b5 8.Be2+–) 8.Bd3 c5 (8...Ne7 9.Ne5 h5 10.Be2+–) 9.bc5 (better is 9.Ba6 Bd7+–) 9...Nc5 10.Bb5 Bd7 11.Bd7 Kd7 12.0–0 Nd3 13.Qa4 Kd8 14.Bc3 Bc5 15.Bg7 Ne7 16.Bh8 Kc7 17.Bf6 Nc6 18.Nc3 Bd4 19.Nd4 Nd4 20.Bd4 Nb2 21.Nb5 Kb7 22.Qb4 Nd3 23.Qe7 Ka6 24.a4 e5 25.Nc7 Kb7 26.Na8 Ka8 27.Be5 Ne5+– 28.Qe5 Kb7 29.Rfc1 Ka6 30.Qd5 f6 31.Qb5 Kb7 32.a5 a6 33.Qb6 Ka8 34.Rc8 1–0. Fournier,Frederic – trancadis, Active, 2006.

3.a3 d5 4.cd5 cd5 5.Bb2=.

3.a3 d6 4.e3 Nf6 5.Nf3 h5 (5...e5 6.d3=) 6.Bb2 e5 7.Be2 e4 8.Nd4 Qe7 (8...c5 9.Nc2+=) 9.0–0+= g5 (9...c5 10.Nc2+–) 10.Qc2 (10.f3 Bg7+–) 10...Be6 (better 10...Bg7!?+=) 11.Ne6+– Qe6 12.f4 (better 12.Bf6 Qf6 13.Nc3+–) 12...0–0–0?? (better 12...ef3 13.Bf3 Bg7+–) 13.fg5+– Ng4 (13...Rg8 14.Rf6 Qe7 15.Nc3+–) 14.Bh8 Be7 15.Bb2 Bg5 16.Nc3 Ne3 (16...f5 17.b5 Nc5 18.bc6 bc6 19.Bg4 fg4 20.Ne2+–) 17.de3 Be3 18.Kh1 (18.Kh1 f5 19.Nd5+–) 1–0. GuestVWGW – GuestKWGT, freechess.org, 2017.

3.b5 Nb4?? 4.a3 Nd5 (4...Qa5 5.Qb3 cb5 6.Qb4 Qb4 7.ab4 bc4 8.Bb2+–) 5.cd5 cb5 (5...cd5 6.Nf3+–) 6.e3 d6 (6...Nf6 7.Nc3 a6 8.Bb2+–) 7.Bb5 Bd7 8.Qa4 Nf6 9.Nf3 (9.Nc3 a6 10.Bd7 Qd7+–) 9...a6 (9...Nd5 10.Bb2+–) 10.Bd7 Nd7 (10...Qd7 11.Qd7 Kd7 12.Nc3+–) 11.0–0 Rc8 (11...b5 12.Qf4+–) 12.Nc3 (12.Bb2!? Qc7+–) 12...g6 13.Rb1 (13.Ne4 Bg7 14.d4 0–0+–) 13...Rc7 14.Qf4 (better 14.Ne4 Bg7+–) 14...e5 (14...Bg7+–) 15.de6! fe6 (15...fe6 16.Ng5 Decoy) 16.Ng5 e5 (16...Qf6 17.Qg4 Qf5 18.Qf5 ef5+–) 17.Qf7 1–0. GuestYBNP – GuestXYLH, freechess.org, 2019.

3.b5 Nc5 4.Bb2 cb5 5.cb5 Qa5 6.a4 (6.Nc3=+) 6...e5 (better 6...Nf6!?=+) 7.Be5+= f6 (7...Nf6!? 8.Bf6 gf6+=) 8.Bc3+– Qc7 9.e3 Bd6 (9...d5!? 10.Bb2 Bd6+=) 10.Qh5+– g6 11.Qh4 Be7 12.Bc4 (better 12.Nh3 Ne6 13.f4+–) 12...g5?? (better 12...f5 13.Qg3 Qg3 14.hg3 Nf6+–) 13.Qh5+– Kf8 (13...Kd8 14.Nf3 d5 15.Bd5 Nd3 16.Ke2 Ne5+–) 14.Qf7 1–0. GuestGHFP – GuestHHXF, freechess.org, 2019.

3.a3 Nc7

4.Bb2 d6 5.e3 f6 (5...e5 6.d4 e4 7.d5=) 6.Nf3 g6 (6...e5 7.Nc3+=) 7.d4+/– Bg7 8.Be2 e5 9.de5 fe5 (9...de5 10.Qd8 Kd8 11.Nc3+/–) 10.Nbd2 (10.c5 dc5 11.Qd8 Kd8 12.Ne5 Ke8+/–) 10...Nf6+= 11.0–0 (11.c5 dc5 12.bc5+/– (worse is 12.Ne5 cb4 13.ab4 Qe7=)) 11...h5? (11...0–0!?=) 12.Qc2 (12.c5 dc5 13.bc5 Bf5+/–) 12...Bf5 13.Bd3 e4? (better is 13...Bd3 14.Qd3 Rh6+=) 14.Ne4+– Qe7 (14...Rg8 15.Nf6 Bf6 16.Bf5 gf5 17.Bd4+–) 15.Nf6 Bf6 16.Bf6 (better is 16.e4!? Bg4 17.e5 de5 18.Ne5 Be5 19.Be5 0–0 20.Bc7 Qc7 21.Bg6 Qg7+–) 16...Qf6 17.Bf5 Qf5 18.Qf5 gf5 19.Rad1 Kd7 20.Ne5 Ke6 21.Ng6 Rhg8 22.Nf4+– Ke7 23.Rd2 h4+/– 24.h3 Ne6 25.Ne6 Ke6 26.Rfd1 Rad8 27.f4 Rg3+= 28.Re2 d5 29.cd5 Rd5= 30.Rd5 Kd5 31.Kf2 b5?? 32.Rc2+– a6 33.Rc5 Ke4 34.Re5 Kd3 35.Rf5 Re3 36.Rd5?? Ke4 37.Re5+– Kd4 38.Re3 c5 39.bc5 Kc5 40.f5 Kc4 41.f6 b4 42.ab4 Kb4 43.f7 Kc4 44.f8Q a5 45.Qf4 Kb5 46.Re5 Kc6 47.Qf6 Kd7 48.Re7 Kd8 49.Qf8 1–0. Fournier,Frederic – NAILA, Active, 2009.

4.Nf3=.

3.a3 e6

4.Nc3 d5 5.cd5 ed5 6.e3 Nc7 7.Bb2 (7.d4 Bd6=) 7...Bf5 (7...Nf6 8.Nf3=+) 8.Nf3= h6 (8...Nf6 9.Be2=+) 9.Be2+= Nf6 (9...Ne6 10.Nb5+=) 10.Nd4 (10.b5 Bd6=) 10...Bg6= 11.0–0 Bd6 12.Rc1 (12.Na4 Rb8=) 12...0–0 13.Nf3 (13.Na4 Qe7=) 13...Ne6 14.d4 (14.b5 Rb8=) 14...Qe7 (14...a6 15.Bd3=) 15.Na4 (15.b5 Bf5=) 15...Ne4 (15...Bh5 16.Ne5 Be2 17.Qe2=) 16.Nc5 (16.Ne5=) 16...Bc5 (16...a5!?=+) 17.bc5 (17.dc5 a5+=) 17...Bh5 (17...Bf5 18.Ne5+=) 18.Ne5 Be2 19.Qe2 Rfe8 20.Rfe1 (better is 20.Rb1+=) 20...g5 (better is 20...Nf6!?+=) 21.Qh5+/– Kg7 22.Rb1 Nf8 23.Ng4 Ng6?? 24.Nh6 Qf6 25.Ng4+– Qf5 26.Qh6 Kg8 27.Bc1?? Qg4 28.f3+/– Qh4 29.Qh4 Nh4 30.fe4 Re4 31.Rb7 f5? 32.Rc7 Rb8 33.Rc6 Rg4+/– 34.g3 Nf3 35.Kf2 Ne1 36.Ke1 f4? 37.ef4+– Rb1 38.Kd2 gf4+/– 39.Kc2 Rc1 40.Kc1 fg3 41.hg3 Rd4 42.Kc2 Rg4 43.Rd6 Rg3? 44.Rd5+– Ra3?? 45.c6 Ra2 46.Kb3 Ra6 47.Rc5 Rb6 48.Ka4 Rb8 49.Ka5 Rc8 50.c7 Kf7 51.Ka6 Ke6 52.Kb7 (52...Rf8 53.c8Q Rc8 54.Kc8+–) 1–0. CHED – juanpacio (1675), internet, 2006.

4.e3 Qf6 5.d4+= Nh6 6.Nf3 d6 7.Nc3 Be7 8.Bd3 g6 (8...Nf5!?+=) 9.e4 Ng4? (better 9...Qg7+–) 10.h3+– Nf2 11.Kf2 e5 12.d5 c5 13.Nb5 h5 (13...Qg7 14.bc5 dc5 15.Qc2+–) 14.bc5 dc5 15.Bb2 g5 (15...Qg7 16.Be5 f6+–) 16.Be5 Qh6 17.Bh8 Qh8 18.e5 Bd7 19.d6 Bd8 20.Be4 Rb8 21.Rb1 g4 (21...Bb6 22.Qd2 g4 23.hg4 Bg4 24.Qg5+–) 22.hg4 Bg4 23.Na7 Bf3 (23...Qg8 24.Bb7 Nb4 25.Bd5+–) 24.Bf3 (better 24.gf3!? Kf8 25.f4 h4+–) 24...Qe5 25.Re1 (better 25.Qe2 Qe2 26.Ke2 h4+–) 25...Bh4 26.Kf1 Be1 (26...Qe1 27.Qe1 Be1 28.Re1 Kd7 29.Bb7 Rb7 30.Re7 Kd6 31.Rb7 Nc7 32.Nb5 Nb5 33.cb5 c4+–) 27.d7 Ke7 (27...Kf8 28.d8Q Rd8 29.Qd8 Kg7 30.Re1+–) 28.Rb7 Qd6 29.d8Q! Kd8 (29...Kd8 30.Qd6) 30.Qd6 Ke8 31.Qe7 (31.Bc6) 1–0. DEFFM – GuestJWLK, freechess.org, 2018.

4.e3 Nf6 5.d4=.

4.Nf3 Nf6=.

3.b5 cb5

4.cb5 Nb4 5.e4 Qc7 6.Nc3 Qd6 7.d3 g6? (7...Qf6 8.Nge2 Qd6+–) 8.Bb2 Bg7 9.a3 Nf6 10.ab4 Qb4 11.Qc2 0–0 12.Ra4 Qd6 13.d4 Rd8 14.Ba3 Qe6 15.d5 Qb6 16.e5 Nh5 17.d6 a6 (17...e6 18.Nd5! ed5+–) 18.Nd5 Qa7 19.de7 Re8 20.b6 Qb8 21.Bd6 Be5 22.Bb8 Rb8 23.Be2 Nf6 24.Qc7 Nd5 25.Qe5 (25...Nb6 26.Rd4+–) 1–0. dont – jackie16, Live Game Caissa's Web, 2004.

4.cb5 Nc5 5.e3 Qb6 6.Nf3 d6 7.Be2 Nf6 8.0–0 h5 (8...Bf5 9.Bb2+=) 9.Bb2+= e5 (9...Bg4 10.Bf6 gf6 11.Nc3+=) 10.d4+– Nce4 (10...ed4 11.Bd4 Be7 12.Nbd2+–) 11.de5 de5 12.Ne5 Ng4 13.Qd5 Nef6?? (better 13...Nd6+–) 14.Qf7 Kd8 15.Rd1 Bd7 (15...Bd6 16.Nc4 Qb5 17.Nd6 Qd7 18.Nb7 Bb7 19.Bg4 Qd1 20.Bd1 Nd7+–) 16.Nd7 Nd7 17.Qd7 1–0. DEFFM – GuestSYCB, freechess.org, 2018.

4.cb5 Nc5 5.e3 d6 6.d4 Ne4 7.Bd3 Nef6 (7...Bf5 8.Ne2 Qa5 9.Bd2+=) 8.Nf3+= Bd7 9.0–0 Qb6 (9...Rc8 10.Bd2+=) 10.a4+– Nd5 (10...Rc8 11.a5 Qc7 12.a6+–) 11.a5 Qc7 12.Qb3 e6 13.e4 Nde7 14.Be3 Nf6 15.Rc1 g6?? (better 15...Qd8+–) 16.Rc7 b6 17.ab6 Bg7 18.Raa7 Rb8 19.e5 Nc8 20.ef6 Bf6 21.Rd7 Nb6 22.Rf7 Rf8 23.Qe6 Kd8 24.Rf8 1–0. GuestWHFK – GuestWBHX, freechess.org, 2018.

4.cb5 Nc7 5.e3 Nb5?? (better 5...Nf6=) 6.Bb5+– a6 7.Be2 (7.Qa4 Qc7 8.Nc3 Rb8+–) 7...b5 8.Bf3 Rb8 9.Ne2 Nf6 10.0–0 g5 (10...Bb7 11.Bb7 Rb7 12.Bb2+–) 11.Bb2 h6 (11...Bg7 12.Nd4 0–0 13.Nc3+–) 12.Be5 Rb6 13.Qc2 d6 (13...g4 14.Ba8 Bg7 15.Bc7+–) 14.Bd4 (14.Bf6 ef6 15.Nbc3 Be6+–) 14...Rb8 (14...Bd7 15.Bf6 ef6 16.Nbc3+–) 15.Ba7 (better 15.Bf6 ef6 16.Nbc3+–) 15...Qc7 (15...Rb7 16.Bc6 Rd7 17.Bd7 Bd7+–) 16.Qc7 Nd7 17.Bc6 Ra8 18.Ba8 Nc5 19.Qc8 1–0. GuestTHLW – GuestDGLK, freechess.org, 2019.

2.c4 b5

3.c5 Na6 4.a3= Bb7 (4...d6 5.d4=) 5.e3 d6 6.d4 dc5 7.bc5 Bc8 8.Nf3 e6 9.Qc2 f6 (9...Nf6 10.Bd3+–) 10.Bd3+– e5 11.Bh7 Rh7? (better 11...Ne7 12.Bd3 ed4 13.ed4 g5+–) 12.Qh7 g5 (12...Ne7+–) 13.Qg8 Be6 (13...ed4 14.Qg6 Kd7 15.ed4+–) 14.Qg6 (better 14.Qe6 Be7 15.Qc6 Kf8 16.Qa6+–) 14...Kd7 (14...Bf7 15.Qf5+–) 15.0–0 (15.de5 Nc5 16.0–0 Bd5+–) 15...Qe7 (15...ed4 16.ed4 g4 17.Nfd2+–) 16.de5 Nc5 17.ef6 Qd6 18.Nc3 a5 (18...g4 19.Rd1 Qd1 20.Nd1 gf3+–) 19.Rd1 b4 20.Rd6 Kd6 21.ab4 ab4 22.Ra8 Be7 23.Ne4 (23.fe7 Nb3 24.e8N Kc5 25.Na4 Kc4 26.Qc2 Kd5 27.e4) 23...Kc7 24.fe7 Ne4 (24...Kb7 25.e8Q Na6 26.Qge6 Kb6 27.Q8c6 Ka5 28.Ra6) 25.Qe4 (25.e8Q Kb6 26.Qe4 Bd5 27.Qb4 Kc7 28.Qc8) 25...b3 (25...c5 26.e8N Kb6 27.Qe6 Kb5 28.Nc7) 26.e8Q b2 (26...Bd5 27.Qb8 Kd7 28.Qee8) 27.Qe5 (27.Q4c6) 27...Kb6 (27...Kb7 28.Q8b8) 28.Q8b8 1–0. GuestVVXJ – GuestWPDG, freechess.org, 2017.

3.c5 d6 4.e3 (4.Nf3 a5 5.cd6 ab4 6.de7 Be7+=) 4...dc5 (4...a5!?–/+) 5.bc5= Bf5 6.Nc3 Nd7 7.d4 a5? (better is 7...b4 8.Qf3 Nh6=) 8.Qf3+– b4 9.Nd1 (9.Qf5!? bc3 10.Ne2+–) 9...Bc2 10.Bc4 (better is 10.Qc6!? Ngf6 11.Nf3+/–) 10...Ngf6= 11.Qe2 (11.Qc6?? Be4 12.Qb5 Bg2–+) 11...Be4 12.Nf3 g6 13.a3 Bg7 14.0–0 Qb8 15.ab4 ab4 (15...Qb4? 16.Ba3 Qb7 17.Nc3+–) 16.Ra8 Qa8 17.Ng5 Bd5 18.e4 Bc4 19.Qc4 0–0 20.f3 h6 21.Nh3 e6 22.Nf4 Rd8 23.Qb4 Rb8 24.Qc4+/– g5 25.e5 Nd5 26.Nd5+– ed5 27.Qc2 Nf8 28.f4 gf4 29.Bf4 Ne6 30.Be3 Rf8 31.Qd2 Kh7 32.Nf2 f5 33.Nh3 Qe8 34.Qd3 Qh5 35.Qa6 Nd8 36.Nf4 Qf7 37.Rb1 Re8 38.Qc8 Qe7 39.Qf5 Kg8 40.Rf1 Rf8 41.Qd3 Ne6 42.Ne6 Rf1 43.Qf1 Qe6 44.Qf4 Qg6 45.h3 h5 46.Kh2 Kh7 47.Qg5 Qe4 48.Qh5 Kg8 49.Qf3 Qg6 50.h4 Qh7 51.g3 Qc2 52.Qf2 Qe4 53.Qf4 Qc2 54.Bf2 Qg6 55.g4 Qh7 56.h5 Qd3 57.Qe3 Qf1 58.e6 Kf8 59.h6 (59.h6 Bh6 60.Qh6 Kg8 61.Qg5 Kh7 62.Qf5 Kg7 63.e7 Qe2 64.Qf8 Kg6 65.e8Q Qe8 66.Qe8 Kf6 67.Bh4 Kg7 68.Bg5 Kh7 69.Qf7 Kh8 70.Bf6; 59.Qf3 Kg8 60.e7 Qe1 61.Be1 Be5 62.de5 Kg7 63.Qf6 Kg8 64.e8Q Kh7 65.Qef7) 1–0. Lauko,M (1980) – Frcka,Bohumir, South Bohemia Open, Cesky Krumlov CZE, 2009.

3.e3 a6 (3...bc4 4.Bc4 d5 5.Be2=) 4.Bb2 e6 5.Nf3 Nf6 (5...Bb4?? 6.Bg7 bc4 7.Bc4+–) 6.Qb3 Be7 7.a4 a5 (7...bc4 8.Bc4 d5 9.Be2=) 8.ab5+= cb5 (8...Bb4 9.Bc3 Bc3 10.Nc3+=) 9.cb5 (9.Ra5!? bc4 10.Bc4+–) 9...Bb4= 10.Be2 Bb7 11.0–0 0–0 12.Nc3 d5 13.Na2 Nbd7? (better 13...Bd6=) 14.Nb4+– ab4 15.Qb4 White gets strong play along the open a–file 15...Nb6 (15...Qb8 16.Ra8 Ba8 17.Rc1+–) 16.Ne5 Nc4 (16...Ra1 17.Ra1 Qb8 18.Qe7+–) 17.Ra8 Qa8 18.Nc4 dc4 19.Ra1 Qd8 20.Bf6 (20.Bc4!? Nd5 21.Qc5 Qh4+–) 20...Qf6 21.Ra7 Rb8 (21...Bd5 22.Bc4 Qh4 23.Ra4 Bc4 24.Qc4+–) 22.Qd6 (22.Qc4 Bd5 23.Qc7 Rf8+–) 22...Rd8 23.Qc7 Bd5 24.b6 (24.Bc4 Bc4 25.Qc4 Rd2 26.Ra8 Rd8+–) 24...Qg6 (24...h6+–) 25.Qd8 1–0. GuestHRDF – GuestTQMB, freechess.org, 2020.

3.e3 bc4 4.Bc4 d5 5.Bb3 (5.Be2 e5 6.Bb2 e4=) 5...Nf6 (5...e5 6.Bb2 Bb4 7.Be5=) 6.h3 (6.Nf3 e6 7.Ba3 Qb6=+) 6...e5–/+ 7.Nf3 (7.Bb2 Bd6–/+) 7...Nbd7 (7...e4 8.Ne5–/+) 8.Bb2 (8.Ba4 Bb7 9.a3 a5=+) 8...Qc7 (8...e4 9.Nd4 Ne5 10.0–0 Bb4 11.Qc2–/+) 9.0–0 (9.a3 a5 10.ba5 e4=+) 9...h6 (9...Ba6 10.d3 Bb4 11.Nc3–+) 10.d4 (10.a3!?=+) 10...e4–/+ (10...Bb4?! 11.Ne5 Ba6 12.Nd3=) 11.Ne5 Bd6 (11...Ba6 12.Re1 Bb4 13.Nd2–/+) 12.Nc3 (12.Qc2 Bb7= (12...Be5? 13.de5 Ne5 14.Be5 Qe5 15.Qc6 Ke7 16.Qa8 Qa1 17.Qa7 Ke6 18.Na3+–; 12...Bb4?! 13.Qc6 Qc6 14.Nc6=)) 12...Bb4 (12...Ne5 13.de5 Be5 14.b5–/+) 13.Rc1=+ 0–0 (13...Bc3 14.Bc3 Ba6 15.Re1=+) 14.Nb5?? (better is 14.Nd5 Nd5 15.Nc6+/–) 14...Qb6–/+ 15.a4?? (better is 15.a3 Ba6 16.ab4 Bb5 17.Re1–/+) 15...cb5–+ 16.Rc6 Qb7 17.ab5 Qb5 18.Ba4 Qa5 19.Qc2 Ba6 20.Rc1 Bd2 21.Rc5 Nc5 (22.dc5 Bc1 23.Bc1 Rfc8–+) 0–1. gtate (1930) – gfry (2085), net–chess.com, 2005.

3.c5 a5

4.ba5 Qa5 5.Bb2 Na6 (5...Qb4 6.Qc2–/+) 6.e3 (6.a4 ba4 7.Ra4 Qc5+=) 6...e6 (6...Nc5 7.Nf3–/+) 7.Nf3 (7.a4 Qb4 8.Bc3 Qc5+=) 7...f6 (7...Nc5 8.Be2–/+) 8.Be2 (8.a4 ba4 9.Ra4 Qc5=) 8...Bc5 (8...Nc5 9.0–0–/+) 9.0–0 (9.a4 b4+=) 9...Ne7 (9...d5 10.a4 b4 11.d4+=) 10.d4 Bd6 11.Nc3 (11.a4 b4=) 11...0–0–/+ 12.Ne4 Bc7 13.Qc2 d5 14.Nc5 Bb6?? (14...Nc5 15.Qc5 Qa7 16.Qc2–/+) 15.Na6 (better is 15.a4 Nb4 16.Qc3+/–) 15...Ba6+= (worse is 15...Qa6 16.a4+=; worse is 15...Ra6 16.a4 b4 17.Ba6 Ba6 18.Rfb1+=) 16.Rfc1 Rac8 17.Nd2 Bb7 18.a4+= b4 19.Nb3+/– Qa7 20.a5 Bc7 21.a6 Ba8+/– 22.Nc5 e5 23.Qb3 Qb8?? 24.a7+– Qb6 25.Ra6 Qa6 26.Na6 Bb7 27.Qb4 Ba6 28.Ba6 Rb8 29.ab8Q Bb8 30.Qe7 (30.Qe7 c5 31.Bb7+–) 1–0. Fournier,Frederic – loeches, Active, 2008.

4.Qb3 ab4 5.Qb4 e6 6.Bb2 Nf6 7.d4 d6 8.cd6 Bd6 9.Qb3 Ra4 10.a3 0–0 11.Nf3 Bd7 12.e3 Qb6 13.Be2 Nd5 14.0–0 c5 15.dc5 Bc5 16.Nc3 Nc3 17.Qc3 f6 18.Rfc1 Bd6 19.Qb3 Kh8 20.Nd4 Ra5 21.Bc3 (21.Ne6? Be6 22.Qc2 Na6–+) 21...b4 22.Bb4 Bb4 23.Qb4 Qb4 24.ab4 Ra1 25.Ra1 e5 26.Nb3 Bf5 27.Nc5 Nd7 28.e4 Nc5 29.ef5 Nd7 30.g4 Rb8 31.b5 Kg8 32.Ra7 Nb6 33.Bf3 Kf8 34.Bc6 h6 35.Kg2 Nc8 36.Ra8 Ra8 37.Ba8 Ke7 38.Kf3 Kd6 39.Bc6 Kc5 40.Kg3 Na7 41.Kh4 Nc6 42.bc6 Kc6 43.Kh5 Kd5 44.Kg6 e4 45.Kg7 Ke5 46.Kg6 Kf4 47.Kf6 Kf3 48.Kg6 (48…Kg4 49.f6+–) 1–0. Hollstein,Gerhard – Koschella,Peter, Mehlingen PSB–ch HT3, 1999.

3.cb5 cb5

4.Bb2 a6 5.a4 Qb6 (5...ba4 6.Nc3+=) 6.e3 (6.ab5 Qb5 7.Nc3 Qb7+–) 6...ba4+= 7.Ra4 f6 (7...Nf6 8.Nf3+=) 8.d4 (8.Na3 Bb7+–) 8...e5 Attacks the isolani on b4 (8...e6!? 9.b5 Bb7+=) 9.de5+– Bb4 10.Nc3 (10.Bc3 Bc3 11.Nc3 fe5+–) 10...fe5 (10...Nc6 11.Nf3 fe5 12.Bc4+–) 11.Qh5+– Kd8 12.Qe5 Nf6 13.Bd3 (13.Nf3 Re8 14.Qg5 a5+=) 13...Re8 (13...Bd6!? 14.Qa5 Qa5 15.Ra5 Nc6=) 14.Qg5+– Bc3?? (better 14...Nc6 15.Nge2 h6+–) 15.Bc3+– Qc6 (15...Nc6 16.Qg7 Nd5 17.Qg5 Nde7+–) 16.Rc4 Qg2 (16...Re7 17.Bb4 d6 18.Rc6 Nc6 19.Bd6 Rb7+–) 17.Qg2 (17.Qg2 Nc6 18.Qg7+–) 1–0. GuestXFHR – GuestFFWH, freechess.org, 2020.

4.Nc3 Qb6 5.Nd5 Qd4= 6.Nc3 Nf6 (6...Qb6!?=) 7.e3 Qb4 8.Rb1 Qd6 (8...Qa5!? 9.Rb5 Qc7+=) 9.Nb5+– Qb6 10.Qf3 Bb7 11.Qb7 (11.Qf4 Na6 12.Nc3 Qc6+–) 11...Qb7 12.Nd6 ed6 13.Rb7 Nc6 14.Nf3 Be7 15.Bb2 0–0 16.Bf6 Bf6 17.Bd3 d5 18.Rd7 Rad8 19.Rd8 Rd8 20.Ke2 d4 (20...Nb4!?+–) 21.Rb1 (21.Rc1 Nb4 22.e4 Re8+–) 21...h6 (21...de3 22.de3 (22.Ke3?! Nd4+=) 22...Re8 23.Nd2+–) 22.Be4 d3 (22...Rd6 23.Rb7 de3 24.fe3+– (24.Ke3?! g5+–)) 23.Bd3 Ne5 (23...Re8 24.Rb7 Re7 25.Re7 Be7 26.Bb5+–) 24.Ne5 Be5 25.Rb7 a5 26.Ra7 a4 27.f4 Bd6 28.Bc4 Rf8 29.Ra4 Kh7 (29...Rc8 30.Bd5+–) 30.Ra6 Be7 (30...Bb4 31.a3 Bc5 32.d4+–) 31.Ra7 Re8 (31...Bc5 32.Rc7 Ba3 33.Bf7 g5 34.Be6 Kh8+–) 32.Bf7 Rf8 (32...Bc5 33.Rc7 Bd6+–) 33.Re7 g6 34.Be8 Kg8 35.Bg6 h5 36.Bh5 (better 36.Bf7! Kh8+–) 36...Kh8 37.g4 1–0. DEFFM – GuestNVFP, freechess.org, 2019.

4.Nc3 (4.e4 Bb7=) 4...Qb6 (4...a5 5.a4 ab4 6.Nb5=) 5.e3 (5.e4 Bb7+=) 5...a6= 6.Bb2 (6.d4 Nf6+=) 6...Bb7 (6...Nf6 7.a4 e6 8.ab5 Bb4 9.Rb1=) 7.Nf3 (7.a3 e5+=) 7...Nf6= 8.d4 (8.a3 e6=) 8...g6 (8...e6 9.a3=) 9.Be2 (9.d5 Qd6 10.a3 Bg7+=) 9...Bg7 10.0–0 Nc6 (10...Qd6 11.Qb3 Nc6+–) 11.d5+– Nb4 12.a3 Nfd5? (better 12...Nbd5 13.Nd5 Bd5 14.Bf6 Qf6 15.Qd5 Qc6 16.Qc6 dc6+–) 13.Nd5+– Nd5 14.Bg7 (14.Bg7 Rg8 15.Bd4+–) 1–0. Bonetti,Shane – mastodon (1650), ICC, 2002.

4.e3 Bb7 5.Nf3 (5.Bb5?? Bg2 6.Nf3 Bh1–+) 5...Nc6 (5...e6 6.a3 a5 7.Bb2=) 6.a3+= a5 7.ba5 (better 7.Bb5 ab4 8.0–0+=) 7...Na5 (better 7...Qa5!? 8.Bb2 Nf6+=) 8.Bb5+– Qb6 (8...Nf6 9.Bb2+–) 9.a4 (9.Nc3 Nf6+–) 9…Nc4 1–0. GuestPNWW – LionNose, freechess.org, 2018.

4.e4 a6 5.a4+= ba4 6.Nc3 e6 7.Ra4 Bb7 8.Nf3 Nc6 The isolani on b4 becomes a target 9.b5 ab5 10.Bb5 Be7 11.d4 Nf6 12.e5 Nd5 13.Nd5 ed5 14.Ra8 Qa8 15.0–0 0–0 16.Qd3 Nb4 17.Qf5 Nc6? (better 17...Bc6 18.Bc6 Qc6=) 18.Bh6+– gh6?? (better 18...g6 19.Qd7 Rd8+–) 19.Bd3 Nd4 (19...Rc8 20.Qh7 Kf8 21.Qh8) 20.Qh7 1–0. marekt (2400) – retiponziani (1760), ChessWorld.net, 2013.

4.e4 a6 5.a4 Bb7 6.Nf3=.

4.e4 e5 5.Bb5+= Bb4 (5...Nf6 6.Bb2 Bb4 7.Be5+=) 6.Qb3 Qc7 7.Bc4 (7.Bb2 Be7+=) 7...d5 8.ed5 Qd6 (8...Bd6 9.Nc3+=) 9.Ba3 (9.Nc3 Nf6+/–) 9...Ba3 (9...a5 10.Qg3 Qf6 11.Bb2+/–) 10.Na3 Bd7? (better is 10...a6+=) 11.Qb7+– Qa3 12.Qa8 Qb2 13.Rd1 Qb4 (13...Qb6 14.Bd3 Qd8+–) 14.Bd3 (< 14.Qa7 Nh6+–) 14...Ke7 15.Rb1 Qd4 16.Qb8 Qd5 17.Ne2 Nf6 (17...a5 18.Nc3 Qd6 19.Rb6+–) 18.Qh8 Qd3 19.Qb8 Qe4 20.Rb4 (20…Qd5 21.Qa7 Qg2 22.Qc5 Ke6 23.Nf4 ef4 24.Rb6 Bc6 25.Rc6 Qc6 26.Qc6 Ke5 27.Rg1+–) 1–0. Kern,Guido (2410) – Hove, Hessen clubgame, 1997.

2.c4 b6

3.a4 Bb7 4.e3 (4.d4 e5 5.de5 Bb4 6.Bd2 Qe7=+) 4...d6 (4...e6 5.Ba3=) 5.Nf3 Nd7 (5...e5 6.a5=) 6.Bb2 (6.d4 e5=) 6...e6 (6...e5 7.b5=) 7.Be2 a6 (7...Ngf6 8.0–0=) 8.0–0+= Be7?? (better 8...Ngf6+=) 9.Bg7+– f6 (9...Bf6 10.Bh8 Bh8+–) 10.Bh8 Kf7 (10...c5 11.bc5 dc5 12.a5+–) 11.Nd4 Nf8 (11...Nh6 12.Bh5 Kg8 13.Bg7+–) 12.Bh5 (12.Bf3!? Ng6 13.Bc6 Bc6 14.Nc6 Qf8+–) 12...Ng6 13.f4 (13.Qf3 Qc8 14.Qh3 Nh6 15.Bg6 hg6 16.Bf6 Bf6 17.Qh6 Qd7+–) 13...c5 (13...f5 14.Qf3 Qc8 15.Bg6 hg6 16.Nc2+–) 14.Ne6! Ke6 15.f5 Kf7 (15...Kd7 16.fg6 hg6 17.Qg4 Kc7 18.Qg6 cb4 19.e4+–) 16.fg6 (better 16.Qg4!? Nh6 17.fg6 Kg8+–) 16...hg6 17.Qg4 (better 17.Bf3 Qd7 18.bc5 dc5 19.g4+–) 17...Kf8 (17...gh5 18.Qh5 Ke6 19.Qg4 Kf7+–) 18.Qg6 Qe8 (18...Bg2 19.Bg7) 19.Qg7 (19.Bg7) 1–0. DEFFM – reekhavok, freechess.org, 2016.

3.a4 e5 4.b5=.

3.Bb2 a5 4.b5 c5 5.e3 Bb7 6.Nf3 d6 7.Be2 Nd7 8.0–0 (8.Nc3 e6+=) 8...Ngf6 9.d3 (9.Bf6 Nf6 10.Nc3 e6=) 9...e5 (9...e6 10.Nc3+=) 10.Nh4 (10.Nc3 Be7+=) 10...Be7 (10...d5 11.Nf5+=) 11.Nf5 g6 (11...0–0 12.Nc3+=) 12.Ne7 Qe7 13.e4 (13.Nc3 d5+=) 13...0–0 (13...h6 14.Nc3+–) 14.Nc3 (14.f4 Ne8+–) 14...Bc8 (14...Ne8 15.f4+=) 15.Bc1 (better 15.Qa4+–) 15...Qe8 (better 15...Kg7!?+–) 16.Bh6+– Nb8 (16...Qd8 17.Bf8 Nf8 18.f4+–) 17.Bf8 (17.f4 Nbd7+–) 17...Qf8 18.Qd2 (18.f4 Qe7+–) 18...Qg7 19.f4 ef4 (19...a4 20.a3+–) 20.Qf4 (worse 20.Rf4 Be6+–) 20...Be6 (20...Nfd7+–) 21.Qf6 Qf6 22.Rf6 Nd7 23.Rf2 Ne5 24.h3 Rf8 (24...Re8 25.Raf1+–) 25.Raf1 Kg7 26.Kh2 (26.Nd5 Bd5 27.cd5 f6+–) 26...h6 27.g4 g5 (27...f6 28.Kg3+–) 28.a3 (28.Kg3 Re8+–) 28...Ng6 29.Kg3 Nh4 (29...Nf4 30.Na4 Rb8 31.Rf4 gf4 32.Kf4+–) 30.Bd1 (30.Rd1 Ng6+–) 30...Ng6 31.Ne2 (31.Bf3 Nf4 32.Rd2 Kf6+–) 31...Ne5 (31...Rh8 32.Ng1+–) 32.Bc2 (32.Nc1 Re8+–) 32...Ng6 (32...Rh8 33.Nc3+–) 33.Nc3 Ne5 (33...Nf4 34.h4+–) 34.Rf6 (34.Nd5 Nd7+–) 34...Nd7 (34...Ng6+–) 35.R6f2 Ne5 36.Nd5 Bd5 (36...Nd7 37.Nc7+–) 37.ed5 Ng6 (37...Nd7+–) 38.Rf7! Rf7 39.Rf7 Kf7 40.d4! Ne7? (40...cd4 41.Bg6 Combination) 41.dc5 dc5 42.Bf5 Ke8 43.Kf3 Kd8 (43...Nf5 44.gf5 h5+–) 44.Ke4 Kc7 45.Ke5 Nf5 (45...Kd8+–) 46.gf5 h5 47.d6 Kd7 (47...Kb8 48.f6 Ka7 49.d7 Kb8 50.d8Q Kb7 51.f7 g4 52.Qe7 Kc8 53.f8Q) 48.f6 g4 (48...Kc8 49.f7 Kb8 50.f8Q Ka7 51.Qe7 Ka8 52.d7 g4 53.d8Q) 49.f7 gh3 (49...Kc8 50.f8Q Kb7 51.Qe7 Ka8 52.d7 Kb7 53.d8Q) 50.f8Q (50.f8Q a4 51.Qe7 Kc8 52.Qc7) 1–0. DEFFM – GuestFBFF, freechess.org, 2018.

3.Bb2 c5 4.b5+= d6 (4...a6 5.Na3+=) 5.e3 (5.g3 Bb7 6.Nf3 Nd7+=) 5...Nd7 (5...Bb7 6.Nf3+=) 6.Nf3 (6.Be2 Ngf6+=) 6...e6 (6...Ngf6 7.Bd3+=) 7.Be2 (7.g3 Bb7=) 7...d5 (7...Ngf6 8.Nc3+=) 8.d4 (8.Nc3 Ngf6+=) 8...cd4 (8...Ngf6!?+=) 9.Nd4+– Bb4 (9...Ne7 10.0–0+–) 10.Nc3 Qf6 (10...Ne7 11.Nc6 Nc6 12.bc6+–) 11.cd5+– e5? (better 11...ed5 12.Qb3 Bc3 13.Qc3 Ne7+–) 12.Nc6 Nh6 (12...Qd6+–) 13.Nb4 a5 (13...Nc5 14.0–0+–) 14.Nc6 Ng4 (14...Nf5+–) 15.Bg4 Qg5 16.Ne4 Qg6 17.Qf3 (better 17.Bf3 Qh6 18.Ba3 Nc5 19.Nc5 bc5 20.Bc5 Qh4+–) 17...Nf6 18.Nd6 Kf8 19.Bc8 Qc2 20.Be5 Qg6 21.Bf6 gf6 22.e4 a4 23.Qa3 Qg2 24.Nf5 Kg8 25.Nce7 Kf8 26.Ng6 Ke8 (26...Kg8 27.Qf8) 27.Qe7 1–0. DEFFM – GuestSTLX, freechess.org, 2019.

3.Bb2 d6 4.e3 e5 5.Nf3 f6 (5...Nf6 6.Nc3=) 6.d3 g5 (6...d5 7.Qa4=) 7.a3 h5 8.h3 h4 9.Be2 Bh6 (9...a5 10.ba5 Ra5 11.d4+=) 10.0–0 (10.d4 Be6+–) 10...Ne7 (10...g4 11.hg4 Bg4 12.Nh4 Be2 13.Qe2 Qd7 14.Qh5 Kd8+–) 11.Nh2 Be6 12.Ng4 (12.d4 Bg7+–) 12...Ng8 (12...Bg7 13.e4+=) 13.Nh6 (13.d4 Bg7 14.e4 Ne7+–) 13...Rh6 (13...Nh6 14.Bh5 Kd7 15.c5+=) 14.f4 (14.d4 Qd7+–) 14...g4 (better 14...gf4!? 15.ef4 Ne7+–) 15.Bg4+– f5 16.Bh5 Kf8 (16...Kd7 17.Bf3 e4 18.de4 Bc4 19.Rf2 fe4 20.Be4+–) 17.Be2 Nf6?! (17...Rg6+–) 18.fe5 de5 19.Be5 Nbd7 (19...Rg6 20.Nc3+–) 20.Bd6 (20.Bf4 Rg6+–) 20...Kg8 21.Bf4 Rg6 22.Bf3 Qe7 (22...Rc8 23.Nc3+–) 23.Bc6 Rc8 24.Bf3 Bc4 (24...b5 25.cb5 Nd5 26.d4+–) 25.dc4 Rc4 26.Bd5 (26.Bd5 Nd5 27.Qd5 Qe6 28.Qa8 Nf8 29.Nd2+– (29.Qa7?! Rf4 30.Rf4 Qe3 31.Rf2 Qe1 32.Rf1 Rg2 33.Kg2 Qg3 34.Kh1 Qh3 35.Kg1 Qg3 36.Kh1 Qh3 37.Kg1 Qg3 38.Kh1 Qh3=)) 1–0. GuestRJMB – GuestVTCT, freechess.org, 2017.

3.Bb2 e6 4.b5 Nf6 5.e3 a6 6.a4 (6.Nf3 ab5 7.cb5 Bb7=) 6...ab5 (6...d5 7.cd5 ed5 8.bc6 Nc6 9.Nf3=+) 7.ab5= Ra1 8.Ba1 Be7 9.Nf3 h6 (9...Bb7 10.bc6 dc6 11.d4=) 10.Bd3 0–0 11.0–0 d5 12.Nc3 dc4 13.Bc4 cb5 14.Nb5 Bd7 15.d4 Na6 16.Qb3 Qa8 (16...Bc6 17.Ne5 Bd5 18.Rc1+=) 17.Ne5 Be8 (17...Qb7 18.Bc3+=) 18.Bb2 Nd5 19.Ra1 Qb7 20.e4 Ndc7 21.f3 Nb5 22.Bb5 Bb5 23.Qb5 Nc7 (better 23...Nb8+=) 24.Qd7+– Bf6 25.Rc1 Rc8 (25...Be5 26.de5 Rc8+–) 26.Qf7 Kh7 (26...Kh8 27.d5! ed5 28.Ng6 Kh7 29.Bf6 Ne8 30.Nf8 Kh8 31.Qb7 Rc1 32.Kf2 Nf6+–) 27.Ng4 Ne8 (27...Bh4 28.d5! Rg8 29.Rc7 Qc7 30.Qc7 Bg5 31.de6 Kh8+–) 28.Nf6 Nf6 29.Qb7 Rc1 30.Bc1 (30.Bc1 h5 31.Bg5+–) 1–0. GuestYDSJ – Vitejvpekle, freechess.org, 2020.

3.Bb2 f6 4.e3 g6 (4...e5 5.b5=) 5.Nf3 e6 6.b5 cb5 7.cb5 Nh6 8.Be2 g5? (better 8...d5+=) 9.Ng5!+– fg5?? (better 9...d5+–) 10.Bh5 Nf7 (10...Ke7 11.Qf3 Nf5 12.Qa8 Bg7 13.Bg7 Ng7 14.Qb8 Nh5 15.Qa7 Nf6+–) 11.Qf3 Bb4 (11...Qe7 12.Qa8 Rg8 13.Qb8 Qd8+–) 12.Qf7 1–0. GuestFQTS – GuestXMCQ, freechess.org, 2018.

3.Bb2 Nf6 4.e3 e6 5.a3 Bb7 6.Nf3 d5 7.cd5 cd5 8.Bb5 Bc6 9.Qa4 Bb5 10.Qb5 Qd7 11.Nc3 Bd6 (11...Nc6 12.Rc1 Rc8 13.Ne2+=) 12.Qd7 (12.Rc1 0–0+=) 12...Kd7 13.Nb5 Rc8 (13...a6 14.Nd6 Kd6 15.Bf6 gf6 16.d4=) 14.Ke2 (14.Ng5 Be7 15.Nf7 Nc6+=) 14...Rc2 (better is 14...a6!? 15.Nd6 Kd6=) 15.Bc3+/– Nc6 16.Kd3 Rc3 17.Nc3 h6 18.h3 e5 19.Ke2 (19.e4 de4 20.Ne4 Nd5+/–) 19...Re8 (19...e4 20.Nd4 Nd4 21.ed4+/–) 20.d3 e4 (20...Nd4 21.Nd4 ed4 22.Nd1+/–) 21.de4+– de4 22.Nd2 Be5 23.Rac1 Bc3 24.Rc3 Nd5 25.Rc2 f5 26.g3 g5 27.Nc4 b5 28.Rd1 Ke6 29.Nb2 Ne5+/– 30.Rc5 Rd8 31.Rdc1 a6 32.Rc8 Rd6 33.Rh8 Kf7 34.Rcc8 Ng6 35.Rhd8 Rd8 36.Rd8 Nc3 37.Ke1 Ne5 38.Rd6 Nf3 39.Kf1 Nh2 40.Kg2 Nf3 41.Rh6 Ne2 42.Ra6 f4 43.gf4 gf4 44.ef4 Nf4 45.Kg3 Ne2 46.Kg4 Nc3 47.h4 1–0. Fournier,Frederic (2215) – Vekemans,Paul, Ch Club, 2001.

3.Nc3 d5 4.cd5 cd5 5.d4 (5.Qa4 Qd7 6.Qd7 Kd7+=) 5...Be6 (5...Bb7 6.Bf4 e6 7.Rb1=) 6.e3 (better 6.Nf3+–) 6...f6? (better 6...Nf6!?+=) 7.Bb5+– Nd7 8.Nge2 Bf7 9.Bc6 (9.0–0 f5+–) 9...e6? (better 9...Rc8!? 10.Qa4 e6+–) 10.Ba8+– Qa8 11.Nb5 Qb7 12.0–0 (better 12.Qa4+–) 12...Bb4?? (better 12...a6 13.Nbc3 Nh6+–) 13.Bd2 Be7 (13...Bf8 14.Rc1 a6 15.Nc7 Ke7 16.Qa4+–) 14.Rc1 a6 (14...Bh5 15.Rc7 Qa6 16.a4+–) 15.Nc7 Kd8 (15...Kf8 16.Nf4 Nc5 17.dc5 Qc7 18.cb6 Qb6 19.Rc8 Be8 20.Qc2+–) 16.Nf4 Bd6 (16...Nf8 17.Qg4 g6 18.Nfe6 Ne6 19.Ne6 Ke8 20.Nc7 Kd8 21.Qe2+–) 17.Nfe6 (better 17.Nce6 Ke7 18.Ng7 Nh6+–) 17...Ke7 18.Qg4 g6 19.Nf4 (better 19.e4 de4 20.d5+–) 19...f5+= 20.Qg5 (20.Qh4 Ngf6 21.Nce6 Be6 22.Ng6 hg6 23.Qh8 Kf7+–) 20...Ngf6= 21.Ncd5 (better 21.Rc2!? Bc7 22.Rfc1=) 21...Bd5–/+ 22.h4? (22.f3 Kf7 23.Qh6=+) 22...Be6?? (better 22...Kf7!? 23.f3 Nh5–+) 23.h5 (23.f3 Bf4 24.Qf4 Qd5=) 23...Bf7 (23...Bf4 24.Qf4 (24.ef4? Kf7–+) 24...a5 25.Rc7=+) 24.h6 (24.f3 Kd8 25.hg6 hg6 A) 26.Ng6?? Rh5 27.Nh8 Be6–+ (27...Rg5?! 28.Nf7 Ke7 29.Ng5–+; 27...Rh8?! 28.Qf5 b5 29.Rfd1–+); B) 26.Rc2+=) 24...Rc8 (24...Ba2 25.f3 Kf7 26.e4 fe4 27.Rc2–/+) 25.Rfe1 (25.Rc8 Qc8 26.Rc1 Qb8=+) 25...Rc4 (25...Rc1 26.Rc1 Ba2 27.Ng6 hg6 28.Qg6–/+) 26.Bc3? (better 26.f3!? Rc1 27.Rc1 Ba2 28.Ng6 hg6 29.Qg6=) 26...b5 (26...Ke8 27.f3 Ba3 28.Rc2–+) 27.d5 (better 27.Bb2–/+) 27...Ne5?? (better 27...Bd5!? 28.Bf6 Nf6–+) 28.Red1?? (better 28.e4 Qc7 29.Be5 Be5 30.Rc4 bc4 31.ef5+–) 28...b4?? (better 28...Neg4 29.Bd4 Rc1 (29...Bd5? 30.Rc4 Bc4 31.Bf6 Nf6 32.Ng6 Ke6 33.Rd6 Kd6 34.Qf6 Kc5 35.Qf5 Qd5 36.Ne5+–) 30.Rc1 Bd5–/+) 29.Be5+– Qb5 (29...Be5 30.Rc4 Qb8+–) 30.Qf6 (30.Qf6 Ke8 31.Bd6 Kd7 32.Ne6 Qd5 33.Qd8 Kc6 34.Qc7 Kb5 35.Rd5 Rc5 36.Rdc5 Ka4 37.Ra5) 1–0. mi – jelquez, net–chess.com, 2019.

3.Nc3 Nf6 4.Nf3+=.

3.Nf3 e6 4.Bb2 Bb4?? 5.Bg7+– d5 6.cd5 cd5 7.Bh8 Nc6 8.Bc3 Bc3 9.Nc3 Nf6 10.d4 Bd7 11.g3 Qc7 12.Rc1 Rc8 13.Bg2 e5 14.Ne5 Ne5 15.de5 Qe5 16.0–0 Rc3 17.Rc3 Qc3 18.Bd5 Be6 19.e4 (19...Ke7 20.Qa4+–; 19.Be6!? fe6 20.Qa4 Nd7 21.Qa7 Qc2+–) 1–0. wlittle (2200) – goonel (1675), net–chess.com, 2005.

3.Bb2 Bb7

4.b5 d5 5.e3 (5.cd5 cd5 6.Nf3 e6=) 5...dc4 (5...Nf6 6.Nf3=) 6.Bc4 cb5 7.Bb5 Nd7 8.Nf3 Qc7 (8...a6 9.Be2=) 9.d4+= Rc8 10.Nc3 e6 (10...Ngf6 11.Qa4+=) 11.0–0 (11.Bd7 Kd7 12.Rc1 Kd8+=) 11...a6 (11...Ngf6 12.Rc1+=) 12.Bd7 (12.Bd3 Ngf6+=) 12...Qd7= 13.Ne5 Qe7? (better 13...Qd6=) 14.Qa4+– Kd8 (14...b5 15.Nb5! ab5 16.Qb5 Bc6+–) 15.Ba3 Qe8 16.Bf8 Qa4 17.Na4 Ke8 (17...Nh6 18.Bg7 Rg8 19.Bf6 Ke8+–) 18.Bg7 Rc4 (18...f6 19.Nb6 Rc7 20.Bh8 fe5 21.Be5 Rc2+–) 19.Nc4 1–0. Anonymous – Anonymous, lichess.org, 2020.

4.b5 Nf6 5.Nc3=.

4.e3 a5 5.a3 d6 6.Nf3 b5 (better 6...ab4!? 7.ab4 Ra1 8.Ba1 e5=) 7.cb5+– ab4 8.ab4 c5 (8...Ra1 9.Ba1 e5 10.bc6 Nc6 11.Bb5+–) 9.bc5 dc5 10.Be2 e6 11.0–0 Nd7 12.Ra8 Qa8 13.Nc3 Ngf6 14.Qc2 Be7 15.Ra1 Qb8 16.d4 cd4 (16...0–0 17.Qa4+–) 17.Nd4+– Rf8? (better 17...Bd6 18.h3 0–0+–) 18.Nc6 Bc6 19.bc6 Nb6 20.Bb5 (better 20.Nb5!? Rg8+–) 20...Qc7 21.Na4 Bd6? (21...Nc8 22.Nc5 Bd6+–) 22.Nb6 Qb6 23.c7 (better 23.Bf6 gf6 24.c7 Ke7 25.c8Q Rc8 26.Qc8+–) 23...Ke7 24.c8Q Rc8 25.Qc8 Qb5 26.Ra7 Nd7 27.Rb7 (27.f3!? f6+–) 27...Qe5?? (27...Qa4 28.Qc1 e5+–) 28.Be5 (28.Be5 Be5 29.Qd7 Kf6 30.Qf7 Kg5 31.Rb5 Kh4 32.Re5 g5 33.Qh7 Kg4 34.h3) 1–0. GuestJXQP – GuestFPMM, freechess.org, 2017.

4.e3 d5 5.Nf3+– dc4 6.Bc4 Ba6 (6...e6 7.Nc3+–) 7.Qb3 (7.Ba6 Na6 8.Qa4 Qc8+–) 7...Bc4+– 8.Qc4 Qd5 9.Qf4 (9.Qc2 Nf6 10.Nc3+–) 9...h6 (9...Nd7!?+–) 10.0–0 (better 10.Nc3 Qd6 11.Qg4+–) 10...f6? (better 10...Nd7!?+–) 11.Qg4 (11.Nc3 Qd3 12.Ne4 Qd5+–) 11...Qd7 (11...Nd7 12.Nc3 h5 13.Qg6 Qf7 14.Qe4+–) 12.Qh5 Kd8 13.Qf7 Qe8 14.Qe6 Qd7 15.Nd4 Qe6 (15...Ke8 16.b5! a5 17.Qe4+–) 16.Ne6 Kc8 17.Nf8 Kb7 18.Ng6 Rh7 19.Nf8 Na6?? (19...Rh8 20.Ne6 Na6+–) 20.Nh7+– Nb4 21.Nc3 Nd3 (21...h5 22.Rab1 Nh6 23.Ba3+–) 22.Ba3 Rd8 (22...c5 23.f4+–) 23.f4 Nc5 (23...c5 24.Rf3 g5 25.Rb1+–) 24.Bc5 bc5 25.Ne4 (25.Rab1 Kc7+–) 25...Kc7 (25...Kc8 26.g4+–) 26.Rfc1 Rd2 (26...c4+–) 27.Nd2 1–0. DEFFM – Vitejvpekle, freechess.org, 2019.

4.e3 d6 5.Nf3 Nd7 6.d4 Qc7 (6...e5 7.Be2+=) 7.Bd3 Ngf6 8.Nbd2 Ng4 (8...e6 9.0–0+=) 9.0–0+– h5 (9...e6 10.e4+–) 10.a4 d5 11.cd5 cd5 12.Rc1 Qd6 13.e4 (13.b5 e6+–) 13...de4 (13...Qb4!? 14.Bc3 Qa3+=) 14.Ne4+– Be4 15.Be4 Rd8 16.Qb3 f5? (better 16...Qf4 17.Rfe1 e6+–) 17.Bf5 Ndf6 (17...Rh6+–) 18.Bg6 Kd7 19.Ne5 Ne5 20.de5 Nd5 21.ed6 (21.ed6 e6 22.Rfe1+–) 1–0. GuestPJFV – GuestKKWH, freechess.org, 2019.

4.e3 e6 (--> 1.b4 b6 2.Bb2 Bb7 3.e3 e6 4.c4 c6).

2.c4 d6

3.a4 a5 4.b5= Nd7 (4...e5 5.e3=) 5.Bb2 (5.d4 e5=) 5...e5 6.e3 (6.d4 Ngf6=) 6...Ngf6 7.Nc3 h5 (7...Be7 8.Nf3=) 8.h3 (8.Rb1 Nb6=) 8...g6 (8...Be7 9.Be2=) 9.Nf3 Bg7 10.Qc2 (10.d4 Qe7+=) 10...c5 (10...0–0 11.d4=) 11.Be2+= Nb6 12.0–0 (12.d3 Rb8+=) 12...Kf8 (12...0–0 13.d3+=) 13.Ng5 (13.d4 Bf5 14.e4 cd4 15.ef5 dc3 16.Bc3 gf5 17.Qf5 Rg8+–) 13...Kg8 14.f4 Bf5 (14...h4 15.Rae1+=) 15.e4+– Be6 (15...Bc8 16.Qd3 Qe7 17.fe5 de5 18.Rf2+–) 16.Ne6 fe6 17.fe5 de5 18.Rf2 (18.Nd1 Qc7+–) 18...Qc7 (18...Kh7 19.Raf1+–) 19.Raf1+– Rf8 20.Nd1 Nfd7 (20...h4 21.Ne3+–) 21.Rf8 (21.Bc3 Rf2 22.Nf2 Kh7+–) 21...Nf8 22.Nf2 (22.Ne3 h4+–) 22...Nbd7 23.Qd3 b6 24.Qf3 Nh7 (24...Nf6 25.Qg3+–) 25.h4 (25.Qg3 Nhf8+–) 25...Ndf8? (25...Qd6!?+–) 26.Nh3 (26.Nd3!? g5 27.Be5 Qe7+–) 26...Qe7 27.Qg3 Nf6 (better 27...Qd8 28.Bc3 Bf6+–) 28.Be5 (better 28.Qg5!? Kh7 29.Be5+–) 28...Ne4+– 29.Rf8 Qf8 30.Qg6 Qf7?? (better 30...Nf6+=) 31.Qe4+– Be5 (31...Rh6 32.Ng5 Qf5 33.Bc7 Bd4 34.Kh2 Qe4 35.Ne4+–) 32.Qe5 Qf5 33.Qb8 Kg7 34.Qc7 (better 34.Qb6 Qe5 35.Qb7 Kf6 36.Qf3 Ke7+–) 34...Kg8 (34...Kh6 35.Ng5 (35.Qb6?! Qe5+–) 35...Rf8 36.Bf3 Qb1 37.Kh2+–) 35.Qd8 (35.Qb6 Qf6+–) 35...Qf8 (35...Kg7 36.Qb6 Qe5 37.Qb7 Kf6 38.Qf3 Ke7 39.Qe3+–) 36.Qg5 (better 36.Qb6 Qf6+–) 36...Qg7 37.Qd8 Kh7?? (37...Qf8 38.Qb6 Qf6+–) 38.Bd3 (38.Ng5 Kh6 39.Nf7 Kg6 40.Nh8 Kh6 41.Bd3 Qd4 42.Qd4 cd4 43.c5 bc5 44.b6 c4 45.Bc4 Kh7 46.b7 Kh8 47.b8Q Kg7 48.Qe5 Kg6 49.Qe6 Kg7 50.Qe7 Kg6 51.Bd3 Kh6 52.Qf6) 38…Kh6 (38...Kh6 39.Qb6 Qe5+–). DEFFM – GuestTTGX, freechess.org, 2016.

3.a4 Nf6 4.b5 (4.d4 Bf5=) 4...c5 (4...e5 5.d4=+) 5.Bb2 b6 (5...e5 6.Nc3=) 6.d4 cd4 7.Bd4 Bb7 8.f3 Nbd7 9.e4 e5 10.Bc3 Nc5 (10...a6 11.Bd3=) 11.Ne2 (11.a5 Nfe4 12.fe4 Qh4 13.Ke2 Qe4 14.Kf2 Qh4 15.Ke2 Qc4 16.Ke1 Qe4 17.Kf2 Qf4 18.Ke2 Be4–/+) 11...Be7 12.Nc1 0–0 13.Nd3 a6 (13...Nfd7 14.a5=) 14.Be2 (14.Nc5 bc5 15.a5 Qc7+=) 14...ab5 (14...Nd3 15.Bd3 Nd7 16.0–0=+) 15.cb5 (15.Nc5 dc5 16.Qd8 Rfd8 17.cb5 Bd6=) 15...Rc8 (15...Nd3 16.Qd3 Re8 17.Nd2=+) 16.0–0 (16.a5 Nd3 17.Bd3 ba5 18.Ba5 Qd7=) 16...Nh5 (better 16...Nd3!? 17.Bd3 d5 18.Be5 de4 19.fe4 Qd7 20.Bf6 Bf6=+) 17.Nc5+= dc5 (17...Rc5 18.a5+=) 18.Bc4 (18.Be5 c4+–) 18...Qd1 (18...Bd6!?+=) 19.Rd1+– Rcd8 20.Nd2 Nf4 (20...Bg5 21.Nf1+–) 21.Nb3 White plans a5 (21.Be5 Bd6 22.Bd6 Rd6+–) 21...Ng6 (21...Rd1 22.Rd1 Ng6 23.a5 ba5 24.Na5+–) 22.a5 ba5 23.Rd8 Rd8 24.Na5 Ba8 25.b6 Rb8 26.Rb1 White intends b7 26...Bd8 (26...Bb7 27.Bd5 Bd5 28.ed5+–) 27.b7 Ba5 28.Ba5 (better 28.ba8Q Ra8 29.Ra1 Bc3 30.Ra8 Nf8 31.Kf2+–) 28...Ne7?? (better 28...Rb7 29.Rb7 Bb7+=) 29.Ba6 (better 29.ba8Q Ra8 30.Rb7 h6+–) 29...Nc6 (29...Bb7 30.Bb7 Ng6+–) 30.Bc7 (30.ba8Q?! Ra8 31.Bb7 Ra5 32.Bc6 h6+–) 30...Bb7 31.Rb7 (better 31.Bb7 Rb7 32.Rb7 f6+–) 31...Ra8 32.Rb6 Nb4 33.Rb8 (better 33.Bc4 Ra1 34.Kf2+–) 33...Rb8= 34.Bb8 Na6 35.Be5 Kf8 36.Kf2 f6 37.Bc3 Ke7 38.Ke3 Kd6 39.g4 Kc6 40.f4 Kb5? (40...Nc7 41.h4=) 41.Kd3 (better 41.g5!? fg5 42.f5+– (42.Bg7?! gf4 43.Kf4 c4=; 42.fg5?! g6+=)) 41...c4 42.Kd4 Nc5 43.f5 Na4 44.h4 Nc5 45.g5 Nd7 (45...Na4!?+–) 46.g6 (46.Kd5 h6+–) 46...hg6 47.fg6 Ne5 48.h5 Nf3?? (48...Ng4 49.Bd2 Ne5+–) 49.Ke3 Ng5 (49...Nh4 50.Bf6! Ng2 51.Kd2+–) 50.Kf4 (better 50.h6 gh6 51.g7 f5 52.ef5 Ka4+–) 50...Ne6 51.Kf5 Nf8 52.e5 fe5 53.Be5 Kb4 54.Bg7 Kb3 55.h6 (55.Bf8 c3 56.g7 c2 57.g8Q Kc3 58.Qg3 Kc4 59.Qg4 Kb5 60.Qe2 Ka5 61.Qd2 Kb6 62.Bc5 Kc5 63.Qc2 Kd5 64.h6 Kd6 65.h7 Ke7 66.Qc7 Kf8 67.h8Q) 55...c3 56.Bc3! Kc3 (56...Ng6 57.Kg6 Kc3+–) 57.g7 Nh7 58.g8Q (58.g8Q Nf6 59.Kf6 Kd4 60.Qg4 Kd3 61.h7 Kd2 62.Qd4 Ke1 63.h8Q Ke2 64.Qh2 Kf3 65.Qhf2) 1–0. afsharian (1665) – jorge61gelp (1705), lichess.org, 2019.

3.a4 g6 4.Bb2 Nf6 5.b5 Bg7 6.e3 a6 7.Qb3 ab5 8.cb5 (8.ab5 Ra1 9.Ba1 c5=) 8...0–0=+ 9.Nf3 Bg4 (9...e5 10.bc6 Nc6 11.d4=+) 10.Be2 Nbd7 11.h3 (11.bc6 bc6 12.Qc2 Qb6=) 11...Bf3 (11...Be6 12.Qb4=+) 12.Bf3= Nc5 13.Qc2 Qc7 (13...cb5 14.ab5 Ra1 15.Ba1=) 14.d4 (14.bc6 Ne6+=) 14...Ne6= 15.0–0 cb5 (15...c5 16.dc5 Nc5 17.Rc1=) 16.Qc7+= Nc7 17.ab5 (17.Rc1!? Ncd5 18.ab5 Ra1 19.Ba1+=) 17...Ra1= 18.Ba1 Nb5 19.Bb7 d5 20.e4 (20.Bc6!? Rb8 21.Rc1=) 20...Ne4 (better 20...de4 21.Bc6 Na7–/+) 21.f3? (better 21.Bd5 Ned6 22.Rd1–/+) 21...Ng3–+ 22.Rf2 (22.Rd1 e6 23.Kf2–+) 22...Nd4 (22...Bd4?! 23.Bd4 Nd4 24.Kh2–+) 23.Nc3 (23.Bd5 Rc8 24.Bb2 Nde2 25.Re2 Ne2 26.Kf2 Bb2 27.Ke2 Rc2 28.Ke3 e6–+) 23...Ndf5 24.Bb2 (24.Rd2 Rb8 25.Rd5 Bc3 26.Bc3 Ne2 27.Kh2 Nc3–+) 24...d4 (better 24...Rb8 25.Ba6 Bc3 26.Bc3 Rb1 27.Bf1 d4–+) 25.Ne4 Rb8 26.Nc5 (26.Ng3 Ng3 27.Ba6 h5–+) 26...e5 (26...Bh6!? 27.Be4–+) 27.Be4 (27.Ba6 Ne3 28.Rd2 Bh6–+) 27...Bf8 (27...Ne3 28.Bc1–+) 28.Bf5 (28.Nd7 Rb5 29.Bd3–+) 28...Nf5 29.Nd7 Rb3 (29...Rb5 30.f4 ef4 31.Nf8 Kf8 32.Ba3 Kg8 33.Rc2–+) 30.Nf8? (better 30.Ne5 Bd6 31.f4–+) 30...Kf8 31.Rd2 (31.Bc1 Ke7–+) 31...Ke7 (better 31...Ne3 32.Bd4 ed4 33.Rd4–+) 32.g4 (32.Kf2 Ne3 33.Bd4 ed4 34.Rd4 f5–+) 32...Ne3 (better 32...Nh4 33.Rf2 Nf3 34.Kf1–+) 33.Bc1 (33.Bd4 ed4 34.Rd4 f5–+) 33...Nc4 (better 33...Rb1 34.Kf2 Rc1 35.Ra2–+) 34.Rd1 (34.Rc2 Rb4 35.Kf2–+) 34...Rf3 35.Kg2 Rb3 36.h4 (36.Rf1 Ke6–+) 36...Ne3 (better 36...f5–+) 37.Kf2 (37.Be3 Re3 38.g5–+) 37...Nd1 38.Ke1 Ne3 39.Be3 Re3 40.Kd2 Rh3 41.Ke2 Rh4 42.Kd3 Rg4 43.Kd2 h5 44.Ke2 h4 45.Kf3 (45.Kd2 h3 46.Ke2 e4 47.Kd2 Rg2 48.Ke1 h2 49.Kf1 h1Q) 45...Rg5 (45...f5 46.Ke2 e4 47.Kd2 Rg2 48.Ke1 h3 49.Kf1 e3 50.Ke1 h2 51.Kf1 h1Q) 46.Kf2 (46.Ke4 h3 47.Kd5 h2 48.Ke4 h1Q 49.Kd3 Rg3 50.Kc4 Qb7 51.Kc5 Rc3) 46...h3 47.Kf3 h2 48.Ke4 h1Q 49.Kd3 Rg3 50.Kc4 Qc1 (50...Qb7 51.Kc5 Rc3) 51.Kd5 (51.Kb4 Qb2 52.Kc5 Ke6 53.Kc4 Rc3) 51...Kf8 (51...f6 52.Ke4 Qc6) 52.Ke4 (52.Kd6 Qa3 53.Kc6 Rc3 54.Kd5 Qc5 55.Ke4 f5) 52...d3 53.Kd5 d2 (53...Rg4 54.Ke5 Qc5 55.Kf6 Qc3) 54.Ke4 Rg1 55.Ke3 (55.Kd5 Re1 56.Kd6 d1Q) 55...d1Q 56.Ke4 Qd4 (56...Qf4) 57.Kf3 Qcc3 (57...Qce3) 58.Ke2 Qdd2 (58...Qde3) 0–1. afsharian – Vusie, lichess.org, 2019.

3.b5 cb5 4.cb5 h6 5.a4 (5.Nc3 d5=) 5...Nf6 6.Bb2 g5 (6...e5 7.d4 Nbd7 8.e3=) 7.e3 Bg7 8.Nf3 g4 9.Nd4 h5 (9...e5 10.Nc2=) 10.Be2 (10.Bd3 e5 11.Nf5 Bf8+=) 10...Nbd7 (10...h4 11.Nb3=) 11.Nc3 Ne5 12.Rc1 h4 13.f4 (13.0–0 d5+=) 13...gf3= 14.Bf3?? (better 14.Nf3 Bf5 15.Ne5 de5 16.Rf1=) 14...Nd3–+ 15.Kf1?! (15.Ke2 Nb2 16.Qb3–+) 15...Nb2 16.Qc2 Nc4 17.Nce2 (17.Kf2 h3–+) 17...Ne5 (17...d5 18.Bd5 Ne3 19.de3 Nd5 20.Qe4–+) 18.Be4 (18.Qc7 Qc7 19.Rc7 Rb8–+) 18...Ne4 19.Qe4 Qa5 (19...d5 20.Qc2–+) 20.Nc3 Ng6 (20...h3 21.g3–+) 21.Ke2 (21.Nc6 d5 22.Qe7 Ne7 23.Na5–+) 21...Ne5 22.Rhf1?? (22.Kf1 Rh5 23.Nd5 Qd2 24.Nb3–+) 22...Qb4 (22...h3 23.g3–+) 23.Qc2?? (better 23.Nd5 Bg4 24.Qg4 Ng4 25.Nb4 Bd4 26.ed4 Nh2 27.Rf4=) 23...Qc4 (better 23...Bg4 24.Kf2 Qc4–+) 24.Kf2 (24.d3 Bg4 25.Kd2–+) 24...Nd3 25.Kg1 Nc1 26.Rc1 Bd4 27.ed4 (27.Qe4 Be3! 28.Qe3 Rg8–+) 27...Qd4 28.Kh1 Rg8 (28...h3 29.Qe4 Qd2 30.Rc2 hg2 31.Qg2 Qe1 32.Qg1–+) 29.Nd1 (29.Rf1–+) 29...h3 30.Ne3 hg2 31.Kg1 Be6 (31...Bh3 32.Qh7 Qd2 33.Qg8 Kd7 34.Qg3 Qc1 35.Kf2 Qf1 36.Nf1 gf1Q 37.Ke3–+) 32.Qh7 (32.a5 Bh3 33.Qh7 Qd2 34.Qg8 Kd7 35.Rc7 Kc7–+) 32...Qg7 (better 32...Rh8 33.Qb1 Qf4 34.Ng2 Qh2 35.Kf2–+) 33.Qe4 (33.Qg7 Rg7 34.d4 Kd7–+) 33...Rb8 (33...Rc8 34.Rd1–+) 34.Qc2 (34.Rc3 Qh6 35.h4 Qh5–+) 34...Qd4 (34...Bh3!? 35.Qc3–+) 35.Qh7 (35.Qc7 Rd8 36.Qb7 Bd7–+) 35…Kd7 (35...Kd7 36.Qc2 Rbc8–+) 0–1. KLINGON09 (1810) – Alexandr02 (1900), lichess.org, 2019.

3.Qc2 Nf6 4.d3 (4.Nf3 e5=+) 4...e5=+ 5.e3 (5.Nf3 Be7=+) 5...Be7 (5...Na6 6.a3=+) 6.Nf3 0–0 (6...Nbd7 7.Be2=+) 7.Bd2 Re8 (7...Bf5 8.Be2=+) 8.e4 (8.Be2 Be6=) 8...Bf8 (8...Na6 9.Be2=+) 9.a4 (9.Be2 d5=) 9...Na6 (9...d5 10.Na3=+) 10.Be2 (10.b5 Nc5=+) 10...d5 11.c5 (11.b5 Nc5 12.Bg5 h6 13.Bf6 Qf6 14.cd5 cd5–/+) 11...b6–/+ 12.0–0 bc5 13.b5 cb5 14.ab5 Nc7 (14...Nb4 15.Qc3–/+) 15.Ba5 (15.Nc3 d4 16.Na4 Nb5 17.Nc5 Qc7–/+) 15...Bd7 (15...Qd7 16.Bc7 Qc7 17.ed5 Nd5 18.Nc3–/+) 16.Na3 (16.Nc3 d4 17.Na4 Bb5 18.Nc5 Qe7–/+) 16...Qb8 17.Rfb1 (17.Bc7 Qc7 18.Rfc1 Bd6–/+) 17...Nb5 18.Nb5 Bb5 19.d4 a6 (19...cd4 20.Rb5) 20.Ne5 (20.de5 Ne4 21.Bc3 Qb6–+) 20...cd4 21.Nc6 Qc8 (21...Rc8 22.ed5 Nd5 23.Qa2 Rc6 24.Bb5 ab5 25.Qd5–+) 22.Bb5 ab5 23.ed5 Nd5 24.Nd4 Qc4 (24...Qc2 25.Nc2 b4 26.h3–+) 25.Qd2 (better is 25.Qb2!? Bc5 26.Nf5–/+) 25...Bc5–+ 26.Rd1? (26.Nf5 Re2 27.Qg5–/+) 26...Qd4 27.Qd4 Bd4 28.Rd4 Ra5 (29.Rdd1 Ra1 30.Ra1 b4–+) 0–1. Langen,Roger – Shapiro,Daniel E (2320), World op, 1993.

3.d4 Qc7 4.Nf3 Bg4 5.e3 (5.h3 Bf3 6.ef3 e6=) 5...Nf6 6.Be2 Nbd7 7.0–0 e5 8.Nc3 Be7 (8...d5 9.c5=) 9.h3 Bh5 10.Bb2 h6 (10...e4 11.Nd2 Be2 12.Qe2=) 11.Nh4 Be2 12.Qe2 ed4 (12...a5 13.b5+=) 13.ed4 d5 (better 13...0–0!? 14.Nf5 Bd8+=) 14.Nf5+– 0–0–0? (better 14...Nf8 15.cd5 Nd5 16.Nd5 cd5 17.Ng7 Kd8+–) 15.Ne7 (15.Qe7?! Nb6 16.Qc7 Kc7+–) 15...Kb8 16.cd5 (16.b5 cb5 17.c5 Rde8 18.Nb5 Qd8+–) 16...Rde8 (16...Rhe8 17.dc6 Nf8 18.Rae1+–) 17.dc6 (better 17.Rae1 Nd5 18.Ncd5 cd5 19.Qf3+–) 17...Nb6 (17...Nf8 18.Rae1 Ng6+–) 18.Rfe1 Nc8 19.Nb5 Qe7 (19...Re7 20.Nc7 Re2 21.Na6 ba6 22.Re2+–) 20.Qd2 Ne4 (20...bc6 21.Re7 Re7+–) 21.Qf4 Ncd6 (21...Qd6 22.Nd6 Ned6 23.d5+–) 22.Re4 Qe4 23.Qd6 Kc8 (23...Ka8 24.Nc7 Kb8 25.Ne8 Kc8 26.Qc7) 24.Qc7 (24.Na7) 1–0. DEFFM – Minon, freechess.org, 2018.

3.d4 e6 4.Nc3 (4.Nf3 Nf6=) 4...Nf6 5.Nf3 Be7 6.e4 (6.a3 a5 7.Bf4 ab4 8.ab4 Ra1 9.Qa1 Nh5=) 6...0–0 (6...d5 7.e5 Bb4 8.Bd2=+) 7.Bd3 (7.Rb1 a5 8.b5 c5=) 7...Nbd7 (7...e5 8.0–0+=) 8.0–0 e5 9.Re1 a6 (9...ed4 10.Nd4 c5 11.Nc2+=) 10.d5 Qb6 (10...a5 11.dc6 bc6 12.b5+=) 11.a3 (11.Rb1 Ng4 12.Qe2 Ndf6+=) 11...Ng4 12.h3?? (better is 12.Qe2+=) 12...Nf2–/+ 13.Be3?? (better is 13.Na4 Qa7 14.Be3 Nd1 15.Ba7 Ra7 16.Rad1–/+) 13...Nh3 (better is 13...Nd1 14.Bb6 Nc3–+ (14...Nb6?! 15.Rad1 Bd7 16.Rb1–/+)) 14.gh3+– c5 15.Kh2 Qd8 16.Rg1 Nf6 17.Bh6 g6? 18.Nh4 Qd7 19.Nf5 Re8 20.Be2?? Ne4 21.Ne7?? Re7= 22.Bg4 Qd8?? 23.Ne4+– (23...f5 24.bc5 fe4 25.Bg5+–) 1–0. gtate (1990) – fabill, net–chess.com, 2005.

3.d4 Nf6 4.e3 Nbd7 5.Nc3 e5 6.Nf3 e4 7.Nd2 d5 8.Qb3 Nb6 9.c5 Nbd7 10.Be2 Be7 11.Bb2 0–0 12.0–0 Re8 (12...b6 13.b5 bc5 14.bc6=) 13.f3 Qc7 (better is 13...ef3 14.Bf3 Nf8=) 14.fe4+/– a6? (better is 14...de4 15.Bc4 Rf8 16.Nce4 h6+–) 15.e5+– Ne4 (15...Ne5 16.de5 Ng4+–) 16.Nce4 Nf8 17.Nd6 Bd6 18.ed6 Qd7 19.e4 de4 (19...Qe6 20.Bf3 de4 21.Ne4+–) 20.Bh5 Qe6 (20...Ng6 21.Bg4! Re6+–) 21.Bf7 Qf7 22.Qf7 Kh8 23.Qf8! (23…Rf8 24.Rf8) 1–0. combat – tepolov, Live Game Caissa's Web, 2004.

3.e3 a5 4.b5 Nf6 5.Bb2 Nbd7 6.Nf3 g6 (6...e5 7.Nc3=) 7.Be2 (7.d4 Bg7+=) 7...Bg7 (7...cb5 8.cb5 Bg7 9.0–0=) 8.d4 (8.Nc3 0–0+=) 8...0–0 9.0–0 Qc7 (9...c5 10.Qd3+=) 10.a4 (10.Qd3 c5+=) 10...Rd8 (10...c5 11.Nc3=) 11.Nbd2 (11.Qd3 c5+=) 11...e5 (11...c5 12.Re1+=) 12.Qb3 h6 13.c5 (13.Bd3 Re8 14.Qc2 cb5 15.ab5 ed4 16.Bd4 Ne5+=) 13...e4 (13...ed4 14.cd6 Qd6 15.Bd4+=) 14.b6 (14.cd6 Qd6 15.Nh4 Nd5+=) 14...Qb8 15.Nh4 d5 (15...dc5 16.Bc4 Nd5 17.Ne4 N7b6 18.Bd5 Nd5 19.dc5= (worse 19.Nc5 b6 20.Nd3 Qd6=+)) 16.f4 (16.f3 Re8+=) 16...ef3 (16...Ne8 17.g3+=) 17.Nhf3 Nf8 (17...Re8 18.Rae1+–) 18.Bd3+– Re8 19.Ne5 (19.Rae1 Be6+–) 19...Be6 (19...N8d7 20.Nd7 Bd7 21.e4 de4 22.Ne4+=) 20.Rae1 N6d7 (20...Qd8 21.Qc3+=) 21.Nef3+– Bg4 (21...Nf6 22.Qc3+=) 22.e4 de4 23.Bc4 Ne6 (23...Be6 24.Ne4 Bc4 25.Qc4+–) 24.Ne4 (worse 24.Re4 Bf5 25.Ree1 Re7+=) 24...Bf3 (24...Re7 25.Nd6 Bf3 26.Be6 (worse 26.Rf3 Kh7+–) 26...fe6 27.Rf3+– (27.Qf3?! Nb6 28.Qb3 Nd5+=; 27.gf3?! Kh7+–)) 25.Qf3+– (25.gf3?! Qf4= (25...Nd4? 26.Bf7 Kh7 27.Qe3+–)) 25...Rf8? (better 25...Re7+–) 26.Qh3 Qe8 (26...Ndc5 27.Nc5 Nc5 28.dc5 Bb2 29.Qh6+–) 27.Nd6 Qe7 (27...Ng5 28.Qd3 Qb8 29.Qg6+–) 28.Rf7! (28.Be6 fe6 29.Re6 Qg5 30.Nb7 Qd2+–) 28...Rf7 29.Be6 (29.Re6 Kh7 30.Re3 Nc5 31.Nf7 Qe3 32.Qe3 Na4+–) 29...Nf6 (29...Kf8 30.Nf7 Nc5 31.Nh6 Rd8 32.Rf1 Qf6+–) 30.Bf7 (30.Bf7 Qf7 31.Nf7 Kf7 32.d5+–) 1–0. DEFFM – hackermate, freechess.org, 2018.

3.e3 h6 4.d4 Nf6 5.Bb2 d5 6.Nc3 Be6 (6...Bf5 7.Nf3=) 7.cd5 Bd5 8.Nd5 Nd5 9.a3 a6 (9...e6 10.e4 Nf6 11.Bd3+=) 10.Nf3 Nd7 11.e4 b5? (better is 11...N5f6 12.Bd3 e6+/–) 12.ed5+– cd5 13.Bd3 g6 (13...e6 14.0–0+–) 14.0–0 Bg7 15.a4 0–0 (15...ba4 16.Qa4 0–0 17.Ba6+–) 16.ab5 Nb6 (16...ab5 17.Qe2 Ra1 18.Ra1+–) 17.ba6 Nc4 18.Bc4 dc4 19.Ne5 (19.Qe2 Qb6 20.Qc4 Rfc8+–) 19...Be5 20.de5 Qd1 (20...Qb6 21.Qa4+–) 21.Rfd1 e6 (21...Rfb8 22.Ra4+–) 22.b5 Rfb8 23.Ra5 Kh7 24.Bd4 g5 25.b6 c3 26.Rc1 Kg6 27.Rc3 Kf5 28.f3 g4 29.Rc7 Kg6 30.b7 Rd8 31.ba8Q Ra8 32.a7 Rd8 33.a8Q Rd4 34.Qg8 Kf5 35.Rf7 1–0. Fournier,Frederic (1990) – NN, Active, 2004.

3.e4 e5 4.Nf3 Nf6 5.Nc3 Be7 6.Be2 0–0 7.0–0 Bg4 8.d3 Nbd7 9.Be3 b6 10.d4 Bf3 11.Bf3 ed4 12.Bd4 Qc7 13.Re1 a5 14.b5 c5 15.Bf6 gf6 16.Nd5 Qd8 17.e5 Rb8 18.Ne7 Qe7 19.ed6 Qd8 20.Be4 Ne5 21.Re3 Re8 22.Rh3 Ng6 23.Bd5 Kg7 24.Bf7 Re5 25.Bg6 hg6 26.Rg3 Qd7 27.Qd3 Qe8 28.Kf1 Rd8 29.f4 Re4 30.f5 g5 31.Kf2 Rd6 32.Qd6 Rd4 33.Qc7 Rd7 34.Qb6 Rd2 35.Kg1 Qd7 36.Rf3 Qd4 37.Kf1 Qa1 0–1. Long_Knights – zggenev, ChessWorld.net, 2005.

3.Bb2

3.Bb2 (--> 2.Bb2 d6 3.c4).

3.Bb2 Qb6 4.a3 a5 (--> 1.b4 c6 2.Bb2 Qb6 3.a3 a5 4.c4 d6).

3.Bb2 e5 (--> 1.b4 e5 2.Bb2 d6 3.c4 c6).

3.Nc3 a6

4.e3 e5 5.Nge2 Nf6 6.Ng3 Be7 7.Be2 0–0 8.0–0 Be6 9.d4 Qc7 10.Rb1 Rd8 11.Qc2 b6 12.Nce4 Nbd7 13.a4 Ne4 14.Ne4 b5 (better is 14...a5=) 15.Bd3?? (15.cb5 d5 16.Qc6 Qc6 17.bc6 de4 18.cd7 ed4 19.ed4 Rd7+/–) 15...Bf5?? (better is 15...bc4!? 16.Be2 d5–/+) 16.a5 (16.cb5 ab5 17.ab5 d5 18.Nf6 Nf6 19.Bf5 g6+–) 16...d5 (better is 16...bc4 17.Nf6 Nf6 18.Bf5 ed4 19.Qc4 de3 20.Be3 d5+=) 17.Ng3?? (better is 17.cd5 ed4 18.ed4 Be4 19.Be4+=) 17...Bd3–/+ 18.Qd3 e4 19.Qe2 Nf6 (better is 19...bc4!? 20.f3 Bd6 21.fe4 Bg3 22.hg3 Qg3–/+) 20.c5= Re8 21.f4 Qd7 22.f5 ½–½. Radwan,Jan (1615) – Korycki,Jozef (1735), Ogolnopolski Integracyjny Turniej Szachowy Poland, 2012.

4.e3 e5 5.Nf3 Ne7 (5...Nf6 6.e4=) 6.Be2 Be6 (6...b5 7.d4 ed4 8.ed4=) 7.0–0 (7.d4 Ng6+=) 7...Ng6 8.d4 f6 (8...d5 9.c5+=) 9.de5 (9.d5!? Bf7 10.e4+–) 9...fe5+= 10.e4 Be7 11.Bb2 (11.a4 a5 12.b5 0–0=) 11...0–0 12.a3 (12.Nd2 Nf4=) 12...b6 (12...Nf4 13.Nd2=+) 13.Qd2 (13.Nd2 b5=) 13...Qc7 14.Rad1 (14.Rac1 Qb7=) 14...Rd8 (14...Nf4 15.b5=+) 15.Ng5 Bd7?? (15...Bg5 16.Qg5 Nf4 17.Rfe1=) 16.Bh5?? (16.Nd5 Bg5 (worse 16...cd5 17.Qd5 Be6 18.Qe6 Kh8 19.Nf7 Kg8 20.Nh6 Kh8 21.Qg8 Rg8 22.Nf7) 17.Nc7 Bd2 18.Na8 Bg5+–) 16...Be8?? (better 16...Nf4 17.g3 Nh5=) 17.Ne6+– Qc8 18.Nd8 Qd8 19.g3 (19.c5 bc5 20.bc5 d5 21.ed5 Bc5+–) 19...Nh8 (19...Nd7 20.f4+–) 20.Qe2 (20.Be8 Qe8 21.Nd5 Bd8+–) 20...Bf7 21.Qf3 (21.f4 ef4 22.Bf7 Nf7 23.gf4 Nd7+–) 21...Qe8? (21...Bc4 22.Ne2 Nd7 23.Qc3+=) 22.Bg4 (22.Bf7!? Nf7 23.b5 ab5 24.cb5 cb5+–) 22...Nd7 (22...Bc4 23.Na4 Bd8 24.Rd6+–) 23.Bd7 (23.Qf5 Nf8+–) 23...Qd7 24.c5! Rf8? (24...bc5 25.bc5 Combination; 24...dc5 25.Rd7 Pinning (25.Rd7 Deflection)) 25.cd6+– (25.cb6?! Bc4 26.Qe3 Bf1 27.Rf1 Ng6+–) 25...Bc4? (25...Bd6 26.Qd3 Rd8 27.Qa6 Qc7+–) 26.de7 Qe7 (26...Rf3?? 27.Rd7 Kf7 28.Rd8 Ke7 29.Rh8 Bf1 30.Kf1+–) 27.Qg4 (27.Qe3 Bf1 28.Rf1 b5+–) 27...Bf1 28.Rf1 Nf7 29.Nd1 Ng5 30.Ne3 Nf3 31.Kg2 Rf6 (31...Nd4+–) 32.Nf5 Rf5 33.Qf5 Nd4 34.Bd4 ed4 35.Rd1 c5 36.bc5 bc5 37.Rb1 Qc7 38.Qd5 Kf8 39.Rb7 (39.Rb7 Qb7 40.Qb7 h5 41.e5 Kg8 42.e6 h4 43.Qf7 Kh7 44.e7 Kh6 45.e8Q h3 46.Kh3 c4 47.Qh5) 1–0. e4_e5_f4 (1740) – Geo777 (1720), lichess.org, 2020.

3.e3 e5

4.Bb2 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 c6).

4.d4=.

2.c4 e5

3.a3 Be7 A) 4.Nc3 A1) 4...Nf6 5.d4 (5.Nf3 e4 6.Nd4 d5 7.cd5+=) 5...ed4 6.Qd4 d6 7.Nf3=; A2) 4...d5 5.cd5 cd5 6.d4 ed4 7.Qd4=; A3) 4...d6 5.d4 (5.e4 f5 6.ef5 Bf5 7.Nf3=; 5.Nf3 f5 6.d4 e4 7.Ng1=) 5...ed4 6.Qd4 Bf6 7.Qd2=; A4) 4...a5 5.b5 d5 6.bc6 bc6 7.cd5=; B) 4.e4 d5 5.cd5 (5.ed5 cd5 6.cd5 Qd5 7.Nc3=) 5...cd5 6.ed5 Qd5 7.Nc3=; C) 4.Bb2 d6 (4...Bf6 5.e4 d6 6.Nf3 Bg4 7.Be2+=) 5.e4 a5 6.d4 ab4 7.de5=; D) 4.e3 D1) 4...d6 5.Bb2 (5.d4 e4 6.Nd2 Nf6 7.Qc2+=; 5.Nc3 Nf6 6.d4 0–0 7.e4=; 5.Be2 a5 6.Bb2 Nf6 7.d4=) 5...Nf6 6.d4 e4 7.d5=; D2) 4...Nf6 5.d4 (5.Bb2 d6 6.d4 e4 7.Nc3=; 5.Be2 d5 6.Bb2 e4 7.d3+=; 5.Nc3 a5 6.b5 0–0 7.d4=; 5.d3 d6 6.Nf3 Be6 7.Be2=) 5...e4 6.d5 d6 7.Bb2=; E) 4.Nf3 e4 5.Nd4 (5.Bb2 ef3 6.Bg7 Bf6 7.Bh8+=) 5...d5 6.cd5 Qd5 7.e3=.

3.a3 f6 4.Bb2 d5 5.cd5 cd5 6.e3 a5 7.b5 b6 (7...Be6 8.d4 Nd7 9.Nc3=) 8.Nf3 (8.d4 e4+=) 8...Bb7 (8...Bd6 9.Nc3 Ne7 10.d4=) 9.Be2 Nd7 10.Nc3 Bd6 11.0–0 Ne7 12.h3 (12.d4 Qb8=) 12...0–0 13.a4 Nc5 (13...Qe8 14.d4=) 14.d4 Nd7 (14...Ne6 15.Rc1=) 15.Qb3 e4? (15...Kh8 16.Ba3 Ba3 17.Ra3=) 16.Nd2 (better is 16.Ne4 Bb4 17.Ba3 Ba3 18.Ra3+–) 16...f5= 17.Rac1 Nf6 18.Rc2 Rc8 19.Rfc1 Bb8 (19...Kh8 20.Ba3=) 20.Nd1 (20.Ba3 Rf7=) 20...Qd6 21.Rc8?? (better is 21.Nf1=) 21...Qh2 (21...Nc8?! 22.f4 ef3 23.Nf3+=) 22.Kf1 Qh1 (22...Rc8?! 23.Rc8 Nc8 24.f4+=; 22...Nc8?! 23.f4+=; 22...Bc8?! 23.f4 ef3 24.Bf3+=) 0–1. Fournier,Frederic – Guest1133964, Partie amicale, 3m + 0s, 2008.

3.a3 g6 4.Bb2 Bg7 5.Nf3 Qe7 6.c5 d5 7.cd6 Qd6 8.e3 Bg4 9.Be2 Nh6 10.d4 Bf3 11.Bf3 ed4 12.Bd4 Bd4 13.Qd4 Qd4 14.ed4 Nd7 (14...Nf5 15.d5 Nd4 16.Be4=) 15.0–0 0–0 16.Nc3 Rad8 17.Rad1 Nb6 18.a4 Nf5 19.a5 Nd5 (19...Nc4 20.d5 Nb2 21.Rb1+=) 20.Nd5 cd5 21.Rfe1 Ng7 (better is 21...Nh4!?+=) 22.Re7+– Rb8 23.Bd5 Nf5 24.Rd7 Rfd8 25.Bf7 Kf8 26.Be6 Rd7 27.Bd7 Nd4?? (27...Ne7+–) 28.Rd4 Rd8 29.Rd1 Ke7 30.Bg4 Rd1 31.Bd1 Kd6 32.f4 1–0. Fournier,Frederic (2445) – Evans,Stan (1925), Chessworld.net, 2012.

3.Bb2 a5 4.b5 d6 5.a4 (5.d4 e4=) 5...Be6 6.e3 Nd7 7.Nf3 h6 (7...cb5 8.ab5 Qc7 9.d3=) 8.Be2 (8.d4 cb5 9.cb5 Ngf6=) 8...cb5= 9.cb5 Nc5 (9...Ngf6 10.Nc3=) 10.d4 Bb3 11.Qd2 Na4 12.de5 d5 (12...Nb2 13.Qb2 a4 14.b6+=) 13.Ba3+= Rc8?? (better is 13...Bc5+=) 14.Nd4+– Nc5 15.0–0 (15.Bg4!? Ne4 16.Qb2 Ba3 17.Na3 Ba4 18.Bc8 Qc8+–) 15...Ne4 16.Qb2 Bc4 17.Bc4 dc4 18.Bf8 Kf8 19.Qa3 Ne7 20.Qa5 Qa5= 21.Ra5 Nd5 22.Rc1 c3 23.Ra7 Nb4 24.Na3 (better is 24.Rb7 Na2 25.Rd1+–) ½–½. Dessing,Bastiaan – Beijer,Bart, It (open) (b), 2003.

3.Bb2 Qf6 4.Qb3 d6 5.g3 (5.Nf3 Bf5=) 5...Qg6 (5...Be6 6.Bg2=+) 6.Bg2 Be7 7.Nc3 Nf6 8.Nf3 0–0 9.0–0 Qh5 10.d4 e4 11.Nd2 d5 12.e3 Na6 13.b5 Nc7 14.a4 (14.bc6 bc6 15.cd5 Ba6 (< 15...Ncd5 16.Nde4 Ne4 17.Be4+/–) 16.dc6 Rab8+=) 14...Re8 (14...Ng4 15.h3 Nf6 16.Kh2=+) 15.f3 ef3 16.Nf3 dc4 17.Qc4 Ncd5 18.Rae1 (< 18.bc6 Ne3 19.Qb5 Qb5 20.ab5 bc6 21.bc6 Nf1 22.Kf1 a5–/+) 18...Be6 19.Qd3 (< 19.bc6 Ne3 20.Qb5 Nf1 (20...Ng2?! 21.Qh5 Nh5 22.cb7=) 21.cb7 Rab8 22.Kf1 Qb5 23.ab5 Bb4–/+) 19...cb5 20.ab5 Rac8 21.e4? (better is 21.Ne5=+) 21...Nc3–+ 22.d5? (22.Bc3 Bc4 23.Qe3 Bb5–+) 22...Nfd5! 23.ed5 (23.Qd5 Nd5) 23...Bf5 (better is 23...Nd5 24.Re5 Nb4–/+) 24.Qd2? (better is 24.Qd4 Bf6 25.Qa7–/+) 24...Bc5–+ (24...Nb5?! 25.Nd4 Bc5 26.Kh1 Nd4 27.Bd4 Re1 28.Re1–+) 25.Nd4 Ne2 (26.Kh1 Ng3 27.Kg1 Nf1 28.Rf1 Be4–+) 0–1. Hanisch,Joerg – Kettner,Juergen, Untergrombach op, 1992.

3.Bb2 Nf6 4.Be5 Bb4 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 c6).

3.Qb3 a5 4.b5 Bc5 (4...d5 5.cd5 Qd5 6.Qd5 cd5 7.Ba3=) 5.Bb2 (5.Qg3 d6 6.Qg7 Qf6 7.Qf6 Nf6+=) 5...f6 6.Nc3 Nh6 7.e3 d6 8.Na4 Nd7 9.Be2 Ba7 10.Bf3 Qc7 11.Ne2 Nc5 12.Nc5 dc5 13.d4 ed4 14.ed4 0–0 15.Ba3 Re8 16.0–0 (16.dc5 Qe5 17.Qb2+=) 16...cd4–/+ 17.c5 Be6 18.Qd3 cb5 19.Nd4? (19.Qb5 Nf5+=) 19...Bc4 (better is 19...Bb8 20.g3 Bc4–+) 20.Nb5+= Qf7 (better is 20...Qh2 21.Kh2 Bd3=) 21.Nd6?? (better is 21.Qb1 Bf1 22.Nd6+=) 21...Bd3–+ 22.Nf7 Nf7 23.Rfe1 Ba6 24.Bd5 g6 25.c6 Re1 26.Re1 bc6 27.Bc6 Rd8 28.Ba4 Bc4 29.h3 Ne5 30.Bb3 Bb3 31.ab3 Bf2! 32.Kf2 Nd3 33.Ke2 Ne1 34.Ke1 Rd3 35.Bb2 Kf7 36.b4 ab4 37.Ke2 Rd8 38.Ke3 f5 39.g3 Ke6 40.h4 b3 41.Bc3 Rd5 42.Bb2 Kd6 43.Bf6 Kc6 44.Kf4 Rd2 45.Kg5 b2 46.Bb2 Rb2 0–1. Amor Alcaide,Manuel (2115) – Sanchez Carazo,FJ (2000), La Lira op Barcelona, 1995.

3.Qb3 Na6 4.a3 Qf6 5.Bb2 d6 6.Nf3 Bf5 7.d4 e4 8.d5 Qd8 9.Nd4 Ne7 10.Nf5 Nf5 11.dc6 Rg8 12.cb7 Rb8 13.Qa4 Qd7 14.Qa6 Qb7 15.Qb7 Rb7 16.e3 Rb4 17.ab4 d5 18.c5 Bc5 19.bc5 Ne3 20.Bb5 Kd8 21.fe3 a6 22.Ra6 Ke7 23.Ra7 Ke6 24.Bd7 Ke7 25.Bf5 Kd8 26.c6 d4 27.Ba3 de3 28.c7 Ke8 29.Ra8# 1–0. Bonetti,Shane – Saevita, ICC, 2002.

3.Qb3 Nf6=+ 4.Bb2 d6 5.e3 Be7 6.d3 (6.d4 e4=+) 6...a5 7.b5 a4 8.Qc3 cb5 9.cb5 Bd7 (9...Nd5 10.Qd2=+) 10.Na3 (10.d4 Nd5 11.Qd3 Qa5 12.Kd1 Qb4=) 10...Nd5–/+ 11.Qd2 0–0 12.Nf3 Qa5 (12...Be6 13.Rc1=+) 13.Qa5 Ra5 14.e4 Nf6 15.Be2 (15.Rc1 Bb5 16.Bc3 Rc8+=) 15...Rc8 (< 15...Bb5 16.Bc3 (< 16.Nb5 Rb5 17.Ba3 Rc8=+) 16...Bd8 17.0–0–0= (< 17.Nb5 Rb5 18.d4 Ba5=)) 16.b6 Bd8 (16...Nc6 17.Rc1–/+) 17.Nc4 Rb5 18.Ba3 Bb6 19.Bd6 Bd4 20.Nd4 ed4 21.0–0 Nc6 22.Bd1 Ra8 23.f4 Be6 24.Rc1 Nb4 25.Rb1+= Nd3 26.Rb5 Bc4 27.Rb7 Ne4 28.Rb6? Ba2–+ 29.Ba4 Nd6 30.Rd6 Nc5 31.Bc6+= Rb8? 32.Rd4+– h6 33.Kf2 Rb2 34.Kg3 g5 35.fg5 hg5 36.Rf5 Ne6 37.Rd7 Rc2 38.Bf3 Nc5 39.Rg5 Kf8 40.Ra7 Bb3 41.Bd5 Ne6 42.Rf5 Bd5 43.Rd5 Rg2 44.Kg2 Nf4 45.Kg1 Nd5 46.h3 f5 47.Kf2 Ne7 48.h4 Nc6 49.Rb7 Ne5 50.Kg3 Nd3 51.h5 Ke8 52.h6 Kd8 53.h7 f4 54.Kh4 Kc8 55.Rf7 f3 56.h8Q# 1–0. SuperForte – REXChess, 1994.

3.Nc3 Bd6 4.e3 (4.Rb1 Nf6=) 4...Nf6 5.Qc2 (5.a3 Bc7=) 5...0–0 6.Bb2 Qe7 (6...Bb4 7.a3 Bc3 8.Bc3–/+) 7.Bd3 Rd8 (better is 7...Bb4!? 8.Ne4 Ne4 9.Be4 g6–/+) 8.Ne4 Ne4 9.Be4 1–0. De Visser,Arnold W – Terpstra,Wiep, NED–ch fin corr, 1989.

3.c5 d6 4.cd6 Bd6 5.a3 Nf6 6.e3 a5 7.b5 0–0 8.Nf3 (8.Nc3 Bg4 9.Be2 Qd7+=) 8...e4 9.Nd4 c5 10.Nc2 Be5 11.Nc3 Bc3 (better is 11...Bg4!? 12.Be2 Be2 13.Qe2 Qd3–+) 12.dc3+= Qd1 13.Kd1 Nbd7 14.Be2 Ne5 15.Ne1 (15.Bd2 Nfg4 16.Rf1 Nh2–+) 15…Nfg4 (15...Nfg4 16.Kc2 Nf2–/+) 0–1. Fournier,Frederic – Mephisto Mondial, Match Thematique, 2000.

3.c5 f6 4.Bb2 d5 5.d4 ed4 6.Bd4 a5 7.a3 ab4 8.ab4 Ra1 9.Ba1 b6 10.Bd4 bc5 11.bc5 Bc5 12.e3 Bd4 13.Qd4 Qa5 14.Nd2 Ba6 15.Ba6 Na6 16.Qa7 Kd8 17.Qg7 Qa1 18.Ke2 Nb4 19.Qh8 1–0. Kucharkowski – Guenther, Freital 1982.

3.e4 Bb4 4.Nc3 Nf6 5.Nf3 (5.Rb1 Bc3 6.dc3 d6–/+) 5...0–0 6.Ne5 (6.Qc2 d6–/+) 6...d6 (6...Re8 7.Nf3–+) 7.Nf3 Bg4 (7...Bc3 8.dc3 Ne4 9.Bd3–/+) 8.Be2 (8.h3!? Bh5 9.Bd3–/+) 8...Bc3–+ 9.dc3 Ne4 10.Qd4 Re8 11.0–0 c5 12.Qd5?? (better 12.Qd3–+) 12...Nc3 13.Qf7 (13.Qb7 Ne2 14.Kh1–+) 13...Kf7 14.Ng5 Kg8 (better 14...Qg5! 15.Bg5 Re2 16.Bf4–+) 15.Bg4 Ne2 16.Kh1 (16.Be2 Re2 17.Nf3 Nd7–+) 16...Nc1 17.Be6 (17.Bf3 Qg5 18.Bb7 Na2 19.Ba8–+) 17...Kh8 (better 17...Re6 18.Ne6 Qf6 19.Rac1 Qe6–+) 18.Rac1?? (better 18.Nf7 Kg8 19.Nd8 Kf8 20.Bd5 (worse 20.Nb7 Re6 21.Rac1 Nc6=+) 20...Rd8 21.Bb7+–) 18…Qg5–+ (18...Qg5 19.Bd5 Nc6–+) 0–1. GuestSMWY – GuestJXNB, freechess.org, 2019.

3.Nf3 e4–/+ 4.Nd4 Bb4 5.Nc3 (5.Bb2 Nf6–/+) 5...Bc3 (5...e3 6.fe3 Bc3 7.dc3–/+) 6.dc3–/+ Ne7 (6...d6 7.Bf4–/+) 7.Bg5 (7.Qc2 Qa5–/+) 7...0–0 (7...d6 8.Qc2 h6 9.Bf4–/+) 8.Qd2 (8.c5 Qa5 9.Rc1 Qc5 10.Be7 Qe7–+) 8...d5 (8...d6 9.Qe3–/+) 9.g3 (9.cd5 cd5 10.Rb1 f6–/+) 9...h6 (9...dc4 10.Rd1–+) 10.Be3 (10.Be7 Qe7 11.cd5 cd5–/+) 10...Nd7 (10...dc4 11.Bg2–+) 11.Bg2–/+ Ne5 12.cd5 cd5 (< 12...Qd5 13.Qc2 Nf5 14.Be4 Ne3 15.fe3=+) 13.0–0 Nc4 14.Qc1 Nc6 (14...Nf5 15.Bf4–/+) 15.a4 (15.f3 ef3 16.ef3 Re8–/+) 15...Bd7 (15...Qe7 16.Rd1–/+) 16.f3 Ne3 (16...ef3!? 17.Nc6 Qe8 (< 17...fg2 18.Nd8 gf1Q 19.Qf1=+) 18.Rf3 Bg4 19.Bh6 Qc6–/+ (19...bc6? 20.Qg5 Qe5 21.Qg4+–; 19...gh6?! 20.Rf4 bc6 21.Rg4 Kh7 22.e4=; < 19...Bf3 20.Qg5 Qe3 21.Qe3 Ne3 22.Ne7 Kh7 23.Be3 Bg2 24.Kg2+/–)) 17.Qe3=+ Nd4 (17...ef3 18.Qf3 Be6 19.Rad1=+) 18.cd4 Bc6 (18...ef3 19.Qf3 Be6 20.Rab1=+) 19.a5 Qg5 (19...ef3 20.Qf3 Qe7 21.Rf2=+) 20.f4 (20.Qg5 hg5 21.fe4 de4=+) 20...Qe7 (20...Qh5 21.Rac1–/+) 21.f5 f6 22.g4 Bb5 23.Rfb1 a6 24.Qb3 Bc4 25.Qb2 Rf7 26.e3 Rc8 27.Bf1 g6 28.Be2 gf5–/+ 29.gf5 Rg7 30.Kh1 Qd7 31.Rg1 Qf5 32.Rg7 Kg7+– 33.Rg1 Kh8 34.Bg4 +=. Roever – Tuchtenhagen,Harald, corr SOK–88–19, 1988.

3.a3 a5

4.Bb2 ab4 5.ab4 (5.Be5 Nf6= 6.ab4 Ra1 7.Ba1= –0.09) 5...Bb4?? (5...Ra1 6.Ba1 f6+= (6...Bb4? 7.Be5 Nf6 8.Bb8+–) 7.Bc3+= –0.31) 6.Ra8+– (6.Ra8 Qc7 7.Qb3+–) 1–0. Giache,Gianluca – Akman,Ozgur, corr ICCF WSTT–3–06–1, 2006.

4.Bb2 d6 5.b5 (5.e3 ab4 6.ab4 Ra1 7.Ba1=; 5.Nf3= Nf6 6.Nc3 ab4 7.ab4=; 5.Qb3 Nf6 6.d4 e4 7.d5+=) 5...Be6 6.e4 Nf6 7.Nc3=.

4.Bb2 f6 5.b5 cb5 6.cb5 d5 7.d4=.

4.b5 cb5 5.cb5 d5 6.d4 Bd6 7.Nc3=.

4.b5 Qb6 5.Nc3 cb5 6.Nb5 d5 7.e3=.

4.b5 Bc5 5.e3 (5.Nf3 d6 6.d4 ed4 7.Nd4=) 5...cb5 6.Bb2 d6 7.d4=.

4.b5 d5 5.bc6 bc6 6.cd5 cd5 7.d4=.

4.b5 d5 5.cd5 cd5 6.Bb2 f6 7.e3 Nd7 8.Nf3 Nb6 9.Be2 Be6 10.0–0 Bd6 11.d4 e4 12.Nfd2 f5 13.Bh5 g6 14.Be2 a4 15.f3 Nf6 16.fe4 fe4 17.Nc3 0–0 18.Na2 (18.Qe1 Qe7=+) 18...Bd7 (18...Qb8 19.h4–/+) 19.Rc1 (19.Nc3 Qc7 20.h3 Bh2 21.Kh1 Bg3=) 19...Qe8 (19...Qe7 20.Rc3–/+) 20.Nc3=+ h5 (20...Qe7 21.Ncb1=+) 21.Rf2 (better 21.h3!?=) 21...Ng4–/+ 22.Bg4 Bg4 23.Rf8 Qf8 24.Qf1 Qe7 25.h3 Rf8 26.Qe1 Be6 27.Qd1? (better 27.Qe2!?–/+) 27...Qg5 (27...Qh4 28.Rc2 Qf2 29.Kh1 Bh3 30.Qg1 Bg2 31.Qg2 Qe1 32.Qg1 Qh4 33.Kg2 Qg3 34.Kh1 Qh3 35.Qh2 Qh2) 28.Nf1 Bh3 29.Qc2 Be6 30.Na4 Nc4 31.Nc5 Bc8?? (better 31...Qh4 32.g3 Bg3 33.Ng3 Qg3 34.Qg2 Qe3 35.Kh2 Rf2 36.Ne6 Rg2 37.Kg2 Qe2 38.Kh1 Ne3–+) 32.Ne4=+ Qh4?? (better 32...Rf1 33.Kf1 Qh4=+) 33.Nd6+– Nd6 (33...Bf5 34.Nf5 gf5+–) 34.Qg6 Kh8 35.Qd6 Qf2 36.Kh1 Bg4 37.Qe5 Kg8 38.Qd5 Kh8 (38...Rf7 39.Nh2 Bf5 40.Nf3+–) 39.Qe5 Kh7 40.d5 Qb2 (40...Rf7 41.Nh2 Kg6+–) 41.Qb2 (41.Qb2 Kg6 42.Qd4+–) 1–0. GuestYMWK – GuestZYZH, freechess.org, 2017.

4.b5 d5 5.cd5 cd5 6.d4 Bd6 7.Nc3=.

4.b5 d5 5.e3 Nf6 6.Bb2 (6.d4 ed4 7.Qd4 c5=) 6...d4 (6...e4 7.cd5 cd5 8.d3=) 7.Nf3= de3 8.fe3 (8.de3 Qd1 9.Kd1 Ne4=) 8...e4+= 9.Ne5 Bd6 10.d4 Be5 11.de5 Qd1 12.Kd1 Ng4 13.Ke2 Be6 14.Nd2 Nd7 15.Rc1 (15.Ne4 Bc4 16.Kd2 cb5+=) 15...Nge5–/+ 16.Ne4 Nc4 (16...Bc4 17.Kd2 Bf1 18.Nd6 Ke7 19.Nf5 Kd8 20.Rhf1 cb5 21.Be5 Ne5 22.Ke2+=) 17.bc6 bc6 18.Bg7 Rg8 19.Nf6 (19.Bd4!?+=) 19...Nf6–/+ 20.Bf6 Rg6 21.Bd4 (21.Bc3 Na3 22.Ra1 Nc4–+) 21...Na3 22.Kf3 (22.Kd2 Bd5–/+) 22...Nb5–+ 23.Ba1 Bg4 (23...f5 24.Bc4–+) 24.Kf4 (24.Kf2 Nd6–/+) 24...Bd7 25.h3 a4 26.g4 a3 27.Bd3 Ra4 28.Kf3 f5 29.gf5= Rg5 30.f6 Rh5 31.Rcg1 Bf5 32.Rg8+= Kf7 33.Rg7 Kf8 34.e4 Bg6 35.Ke3 Nd6 36.e5 Nf5 37.Bf5 Bf5 38.Bd4 Rc4 39.Ra7 c5 40.Ba1 Rg5?? 41.Rd1+– Rg3 42.Kf2 Rd3 43.Rd3 Bd3 44.e6 Be4 45.Be5 (45.Be5 Rc2 46.Ke3 Rc3 47.Ke4 Rc4 48.Kd5 Rd4 49.Bd4 cd4 50.Ra8#) 1–0. Margraf – Schuehler,Ernst, corr SOK–87–09, 1987.

4.b5 d6 5.e4 (5.Nc3 Nf6 6.d4 ed4 7.Qd4=; 5.e3 Nf6 6.d4 e4 7.Nc3=; 5.d4 ed4 6.Qd4 Be7 7.Nc3=; 5.Qa4 Nf6 6.Nc3 Be7 7.e4=) 5...cb5 6.cb5 Nf6 7.Nc3=.

4.b5 Ne7 5.Bb2 (5.d4 ed4 6.Qd4 d5 7.cd5=) 5...Ng6 6.d4 d5 7.e3=.

4.b5 Nf6= 5.d4 (5.Bb2 d5 6.cd5 Qd5 7.Nc3=) 5...ed4 6.Qd4 d5 7.cd5=.

3.a3 a6

4.Nc3 d5 (4...d6 5.Nf3 Nf6 6.d4 e4 7.Nd2 d5; 4...Nf6 5.Nf3 d6 6.e4 a5 7.b5 Nbd7) 5.Nf3 d4= 6.Ne4 Nf6 7.d3 Ne4.

4.e3 a5 5.Bb2 Nf6 6.Be5 ab4 7.Nf3 ba3.

4.e3 e4 5.Nc3+= f5 (5...Nf6 6.Nge2+= (6.Qc2 d5 7.f3 Bf5) 6...d5 7.Nd4 Be7; 5...d5 6.Qc2 Nf6 7.Bb2 Bd6) 6.f3 (6.Nge2 Nf6+– (6...a5 7.b5 Nf6) 7.Nf4 Bd6) 6...d5 (6...a5 7.ba5 Bd6) 7.f4 (7.cd5 cd5 8.Qa4 Bd7=; 7.Bb2 Nf6) 7...Qh4 (better 7...Nf6!?=+) 8.g3+= Qf6 (8...Qd8 9.Nge2+=) 9.Bb2+– Qf7 10.cd5 cd5 11.Nd5?? (better 11.Nh3 h6 12.Rc1+–) 11...Qd5–+ 12.Rc1 Nc6 (12...Be6 13.Nh3 b5–/+) 13.Ne2 (better 13.Nh3!?–/+) 13...Nf6–+ 14.Bf6 gf6 15.Bg2 (15.Nc3 Qf7–+) 15...a5 (15...Be6 16.Nc3 Qd7 17.g4–+) 16.ba5? (16.Nc3 Qf7 17.b5–+) 16...Ba3 17.0–0 (17.Nc3 Qc5 18.Ra1–+) 17...Bc1 18.Qc1 (18.Nc1 Qa5 19.Nb3 Qd5–+) 18...Ra5 19.Qb2 (19.d4 b5 20.g4 Rg8 21.gf5 Bf5–+) 19...0–0 (19...Ra2!? 20.Qf6 Rf8 21.Qc3 Qd2 22.Qd2 Rd2 23.Re1–+) 20.Nc3 Qc4 (better 20...Qc5 21.Rc1 Qe7 22.Qb6–+) 21.Nd1 (21.Rb1 Be6–+) 21...Be6 (better 21...Ra2 22.Qc3 Qc3 23.Nc3 Rd2–+) 22.Qb7 (22.Nc3 Rd8 23.Rb1 Rd7–+) 22...Nb4 (better 22...Rb8 23.Qc7 Rd5 24.d3 Rd3 25.Qb8 Nb8 26.Nb2–+) 23.Nb2 (23.Nc3 Nd5 24.Nd5 Rd5–+) 23...Qb3 (better 23...Qc5 24.Be4 fe4 25.Qe4–+) 24.Rb1 (24.Nd1 Ra2 25.Nf2 Rd2 26.Bh3–+) 24...Qc2 25.Qb4 (25.Rd1 Ra2 26.Bf1 Rb2 27.Be2–+) 25...Qb1 26.Kf2 (26.Bf1 Ra1 27.Qb5 Rd8 28.Kg2 Rd2 29.Kh3 Rb2 30.Qe8 Kg7 31.Qe7 Bf7 32.Qf7 Kf7 33.Bc4 Kg6 34.Bf7 Kf7 35.g4 Qg1 36.gf5 Rh2) 26...Ra2 (26...Ra1 27.Nd1 Qd1 28.Qf8 Kf8 29.Be4 Qf1) 27.Qd6 Re8 (27...Ra1 28.Nd1 Qd1 29.Qe6 Kh8 30.Qf6 Rf6 31.Be4 Qf1) 28.Bh3 Qb2 (28...Ra1 29.Nd1 Qd1 30.Qe6 Re6 31.Bf5 Qd2) 29.Ke2 (29.Bf1 Qc1 30.h3 Rd2 31.Qd2 Qd2 32.Be2 Bc4 33.g4 Be2 34.gf5 Bf3 35.Kg3 Rc8 36.Kh4 Qe1) 29...Bc4 30.Ke1 (30.Kf2 Qc1 31.g4 Rd2 32.Qd2 Qd2 33.Kg3 Qe1 34.Kg2 Rd8 35.gf5 Rd2) 30...Ra1 31.Kf2 Qc1 32.g4 (32.Qd5 Bd5 33.g4 Qg1 34.Ke2 Qe1) 32...Qe1 (32...Qg1) 33.Kg2 Bf1 (33...Qg1) 34.Kg1 (34.Kh1 Bh3) 34…Bh3 0–1. howieux66 – teufelhunden, gameknot.com, 2018.

4.e3 Nf6 5.Nc3= (5.Bb2 a5 6.Be5 ab4 7.Nf3 ba3) 5...a5 6.b5 d5 7.Bb2 Bd6.

4.Nf3 e4 (4...d6 5.Nc3 Nf6 6.e4 c5 7.Bd3 Nc6) 5.Nd4 c5 6.bc5 Bc5 7.Nb3 Ba7.

3.a3 d5

4.Bb2 f6 5.cd5 cd5 6.Nf3 Be6 7.e3 Bd6 8.Be2 Ne7 9.0–0 0–0 10.Nc3 Nd7 11.Nb5 Bb8 12.d4 (12.Rc1 a6 13.Nc3 a5=) 12...a6 (12...e4 13.Nd2=) 13.Nc3 e4 14.Nd2 (14.Ne1 Nf5=) 14...f5 (14...Qb6 15.Qb3=) 15.f4 ef3 (15...Bd6 16.Rc1=) 16.Nf3 Nf6 17.Ne5 (17.Rc1 Ng4 18.Qd2 Qd6=+) 17...Ng6 (17...Be5 18.de5 Ng4 19.Bg4 fg4 20.Qd3=) 18.Na4 (18.Ng6 hg6 19.g3 Bd6=) 18...Ne4 19.Nc5 (19.Ng6 hg6 20.g3 b6=) 19...Nc5 (19...Qf6 20.Ng6 Qg6 A) 21.Nb7? Qh6 22.Bh5 Bf7–+ (22...Qe3?! 23.Kh1–+); B) 21.Ne6 Qe6 22.Rf3 Ng5–/+; C) 21.Qd3=) 20.bc5 (20.Ng6 Ne4 21.Nf8 Qh4=) 20...Ne5= 21.de5 Qe7 22.Bd4 Bd7 The isolani on e5 becomes a target (22...Ba7 23.Rc1=) 23.Qb1+= Bc8 24.Qb2 g6 (24...Ba7 25.Qb4+=) 25.Bf3+– Rd8 26.Rfc1 (26.Rab1 Ba7+–) 26...Bc7+= 27.c6 b5 28.Qb4 Qe8 29.a4 ba4 30.Qa4 Be5?? (better 30...Qe7+=) 31.c7+– Rd7 (31...Bd4 32.Bd5! (32.Qd4?! Rd6 33.Bd5 Rd5 34.Qd5 Be6+–) 32...Be6 A) 33.cd8N?! Qa4 34.Be6 Kf8 35.Ra4 Be3 36.Kf1 Bc1+–; B) 33.cd8B?! Be3 34.Kf1 Qa4 35.Be6 Kf8 36.Ra4 Bc1+–; C) worse 33.cd8Q C1) 33...Rd8?? 34.Qe8 (34.ed4?! Bd5 35.Qe8 Re8+–; 34.Qd4?! Rd5 35.Qa7 Rd3+–) 34...Re8 35.Be6 (35.ed4?! Bd5 36.Ra6 Re7+–) 35...Re6 36.ed4+–; C2) 33...Be3 34.Kh1 Rd8 35.Qe8 Re8+–; D) 33.Be6 Qe6 34.cd8R (34.ed4?! Rdc8+–) 34...Rd8 35.ed4 Qe3 36.Kh1 Qd4 37.Qa6+–) 32.Bd5! Kg7 (32...Rd5 33.Qc6 Double attack (33.Qe8 Pinning; 33.Qe8 Deflection; 33.Qc6 Decoy)) 33.Ba8 1–0. onur604 (2320) – vyoga (1980), lichess.org, 2020.

4.Bb2 f6 5.e3 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 c6 5.c4).

4.cd5 cd5 5.Bb2 d4 6.Nf3 f6 7.e3 de3 8.de3 Qd1 9.Kd1 Be6 10.Bb5 (10.Nbd2 Nd7=) 10...Nc6 11.Nc3 Rd8 12.Ke2 a6 13.Bc6 bc6 14.Rhd1 Rd1 15.Rd1 Bg4 (15...c5 16.bc5 Bc5 17.Ne4=) 16.h3 Bh5 (16...Be6 17.Rc1+=) 17.g4 (17.e4 Bf7+=) 17...Bf7= 18.Nd2 Ne7 19.e4 (better is 19.Rc1!?+=) 19...Ng6+= 20.Kf3 (20.Ke3 Nf4 21.Ne2 Nh3+=) 20...Be7 (20...Nf4 21.h4–/+) 21.Na4 (21.Ne2 0–0=) 21...0–0 (better is 21...h5 22.g5 fg5+=) 22.Nb6?? (better is 22.Rc1=) 22...Rd8–+ 23.Bc3?? Rd3 (23...Rd3 24.Ke2 Rc3–+) 0–1. Fournier,Frederic (1710) – qaqao@chesscube.com (1635), Active, 2011.

4.cd5 cd5 5.Bb2 Bd6 6.e3 Nf6 7.Nf3 e4 8.Nd4 0–0 9.Be2 a5 (9...Nc6 10.d3+=) 10.b5= b6 (10...Nbd7 11.d3=) 11.0–0 Qc7 (11...Ra7 12.Nc3=) 12.h3 (12.f4 Nbd7=) 12...Bb7 (12...Re8 13.Nc3=) 13.Nc3 Bh2 (13...Be5 14.d3=) 14.Kh1 Be5 15.Na4 (15.d3 Rc8=) 15...Nbd7 16.Rc1 Nc5 17.f3 (17.d3 Rac8=) 17...Rfc8 (17...Nh5 18.Nf5 Bb2 19.Nb2 Ng3 20.Ng3 Qg3 21.d4 ed3 22.Bd3+=) 18.f4+= Bd6 19.Nf5 Qd8 20.Bd4 (20.Bf6 A) worse is 20...gf6 21.Bh5 (21.Nd6?! Qd6 22.d3 f5+=) 21...Kf8 22.Nc5 Rc5 23.Qg4+– (23.Nd6?! Qd6 24.d3 Rac8 25.Rc5 Qc5=); B) 20...Qf6 21.Nb6 Qf5+=) 20...Na4 (20...Bf8 21.d3=) 21.Qa4 Bc5 22.Be5 h6 23.Nd4 Qe7= 24.Nc6 Bc6+= 25.bc6 Ba3 26.Rc2 Bc5 27.Bb5 Nh5 28.Rfc1 Ng3 29.Kh2 Nf5 30.g4 Nh4–/+ 31.Bb2 Nf3 32.Kg2 Bb4 33.Rd1 Bd6 34.Qa1 g5 35.Bf6 Qc7 36.Bh8 f5 37.Qf6 fg4 38.hg4–/+ Nh4 39.Kh1 gf4 40.Qh4 Kh8 41.Qh6 Qh7 42.Qh7 Kh7 43.ef4 Bf4–/+ 44.Ba4 Kg6 45.Bb3–/+ d4 46.Be6 Rh8 47.Kg1 Kf6 48.Bf5+= e3 49.de3= de3 50.Rd4 Kg5 51.Rd5 Rad8 52.Bd7= Kg6 53.c7 e2 54.Re2 Bc7 55.Re6 Kg7 56.Rg5 Kf7 57.Rf5 Kg8 58.Rg5 Kf7 59.Rf5 Kg7 60.Rg5 Kf7 ½–½. Gross,Wilhelm – Fritz2, 1994.

4.cd5 cd5 5.Bb2 Bd6 6.Nf3 f6 7.e3 Be6 8.Nc3 Ne7 9.Nb5 0–0 10.Nd6 Qd6 11.Be2 Nd7 12.0–0 Rfc8 13.a4 Nb6 (13...Qb4? 14.Ba3 Qb6 15.Be7+–) 14.d3 Rc7 15.a5 Nd7 16.Ba3 b5 17.d4 a6 18.Nd2 Bf5 19.Qb3 Bc2 20.Qa2 Rac8 21.Rac1 ed4 22.ed4 Qf4 23.Nf3 Bb3 24.Qb3 Rc1 25.Bc1 Rc1 26.g3 Rf1 27.Bf1 Qc1 28.Kg2 Nb8 29.Bd3 Nbc6 30.h4 h5 31.Bc2 Kf8 32.Bd3 Qa1 Attacks the isolani on d4 33.Be2 Nd4 34.Nd4 Qd4 35.Bh5 Nc6 36.Bg6? Nb4 37.Qf3 Qe5 38.Qg4–/+ f5?? 39.Qb4+– (39.Qb4 Qe7 40.Qc3 Qe4 41.Kh2+–) 1–0. Ackaert,T (2060) – Gheury,J (1835), Pays de Charleroi Open, 2011.

4.cd5 cd5 5.d4 Bd6=.

4.e3 a5 5.Bb2 ab4 6.ab4 Ra1 7.Ba1 e4 (7...Bb4? 8.Be5 Nf6 9.Bb8+–) 8.Nc3 Nf6 9.c5 Be7 10.d4 (10.d3 ed3 11.Qd3 b6 12.cb6 Bb4–/+) 10...0–0 11.Nge2 Bg4 12.h3 Bh5 (12...Bf5 13.Ng3 Be6 14.Be2+=) 13.g4 (13.Qd2 b5=) 13...Bg6+= 14.Ng3 Nbd7 (14...Nfd7 15.b5+=) 15.Bg2 (15.h4 h6=) 15...Qc7 (15...b5 16.h4 h6 17.Bb2=) 16.0–0 (16.g5 Ne8=) 16...Ra8 17.Bb2 (17.g5 Ne8 18.h4 f6+=) 17...Nf8 (17...h6 18.Qe2+=) 18.Qb3 Ne6 19.Ra1 Ra1 20.Ba1 h5 (20...b5 21.Qa2+=) 21.gh5= Nh5 22.Nh5 Bh5 23.b5 (23.Nd5!? cd5 24.Qd5=) 23...Ng5+= 24.bc6 bc6 25.Qb6 Qc8 26.Kh2 (26.Qa7 Bd8 27.Kf1 Nh3 28.Ke1–+) 26...Bf3 27.Bf3 Qh3 (27...Qh3 28.Kg1 Nf3) 0–1. Fournier,Frederic – Mephisto Mondial, Match Thematique, 2000.

4.e3 a5 5.Bb2 dc4 6.Bc4 b5=.

4.e3 a5 5.b5 cb5 6.cb5 Nf6 7.Bb2 Bd6 8.Nf3 e4 9.Nd4 0–0 10.Be2 Qc7 11.h3 Nbd7 12.Nc3 b6 13.Rc1 Nc5 14.0–0 Bb7 15.a4 Be5 16.Nf5 Qd7 17.Bg4 Ng4=+ 18.hg4 Nd3–/+ 19.Qb3 Nc1–+ 20.Rc1 d4 21.Ne2 h5 22.Ned4 hg4 23.g3 g6 24.Nh4 Qd5 25.Qd1 Qa2 26.Bc3 Bd4 27.Bd4 Qe6 28.Rc7 Rab8 29.Ng2 g5 30.Ne1 Rfc8–+ 31.Rc3 Rc3 32.dc3 Rd8 33.Nc2 Bd5 34.Kg2 Bb3 35.Qh1 f6 36.Ne1 Ba4 37.c4 Bb3 38.Qh5 Rd6 39.Qg6 Kf8 40.c5 Rd5 41.cb6 Rb5 42.Qh7 Qf5 43.Qh8 Kf7 44.Qb8 Kg7 45.Qc7+/– Bf7 46.b7 a4 47.b8Q Rb8 48.Qb8 a3 49.Qb4 a2 50.Ba1 Qh7 51.Qb2 Qh6 52.Nc2 Qg6 53.Nd4 Kh7 54.Qb7 Kg7 55.Qa7 Kh6 56.Qa8 Kg7+/– 57.Qc8 Qh5 58.Nf5 Kg6 59.Ne7 Kg7 60.Qc6 Kf8 61.Qe4 Qh3 62.Kg1 Kg7 63.Nf5 Kg6 64.Qd4 Qh8 65.Qg4 Qb8 66.Ne7 Kh6 67.Qd4 Qe5 68.Nc6 Qd4 69.Nd4 g4 70.Kf1 Bc4 71.Ke1 Kg6 72.f4 gf3 73.Nf3 Kf5 74.Kf2 Bd5 75.Nd2 Bc6 76.Bd4 Bb7 77.Nb3 Be4 78.Nc5 Bc6 79.Nd3 Bd5 80.Nf4 Bf7 81.Ke2 Kg4 82.Kf2?? Kf5 83.Kg2 Be8 84.Kh3 Bd7 85.Kh4 Ke4 86.Nh5 Bc6 87.Nf6 Kd3 88.g4 Kc2 89.g5 Kb1 90.g6 Bb5 91.g7 Bc4 92.Kg4 a1Q 93.Ba1 Ka1 94.e4 Bf7 95.Kf5 Kb2 96.e5 Bc4 97.e6 Kc2 98.g8Q Kb2 99.Ke5 Kc3 100.Qg4 Kb3 101.e7 Bb5 102.Kd5 Kc3 103.Qd4 Kb3 104.Ne4 Be8 105.Qc4 Kb2 106.Qc3 Ka2 107.Nd2 Ba4 108.e8Q! Bc6 109.Kc5 Be8 110.Qb3 Ka1 111.Qb1# 1–0. NN – REXChess, 1994.

4.e3 dc4 5.Bc4 b5 6.Bb3=.

4.e3 Bd6 5.Bb2 Nd7 6.Nf3 Ne7 7.Nc3 0–0 8.Rc1 a6 (8...a5 9.cd5 ab4 10.ab4 Bb4 11.dc6 Nc6 12.Nd5=) 9.Be2 (9.cd5 cd5 10.Be2 Nc6=) 9...Nf6 (9...a5 10.c5 Bb8 11.0–0+=) 10.d4 e4 11.Ne5 Ne8 12.h3 Be6 13.0–0 f6 14.Bg4 (14.cd5 cd5 15.Bg4 Nc7 16.Be6 Ne6=) 14...Nc7 (14...Bg4 15.Ng4 f5 16.Ne5+=) 15.Be6 (15.Nc6 bc6 (worse is 15...Nc6 16.Be6 Ne6 17.cd5+/–) 16.c5 a5=) 15...Ne6 16.Ng4 Bc7 (16...f5 17.cd5 Nd5 18.Ne5+=) 17.f4 (17.Qe2 Rc8=) 17...f5 (17...ef3 18.Rf3 dc4 19.Qe2–+) 18.cd5 Nd5 19.Nd5 Qd5 20.Nf2 (20.Ne5 Be5 21.de5 Rad8+=) 20...Bd6 21.Qc2 a5–/+ 22.Qc4 ab4–+ 23.ab4 Nc7 24.g4 g6 25.Qc3 Ra4 26.Qc2 Ra2 27.Ra1 Rfa8 28.Ra2 Ra2 29.gf5 gf5 30.Nd1 Bb4–+ 31.Kh1 Qf7 32.Rg1 Kf8–/+ 33.Nc3 Bc3 34.Qc3 Nd5 35.Ba3 Ke8 36.Qa5 Kd7 37.Qa7 Nc7 38.Qc5 Nb5?? 39.Qe5+/– Ra3 40.Rg7 Qg7 41.Qg7 Kc8 42.Qg8 Kc7+= 43.Qh7 Kb6 44.Qf5 Re3 45.Qc5 Ka6 46.Kg2 Rd3 47.f5 e3 48.Kf1 Rd4 49.Ke2 Re4 50.f6+/– Nd4 51.Kd3 e2 52.Qa3 Kb5 53.Ke4 e1Q 54.Kd4 Qh4 55.Ke5 Qg5 56.Ke6 Qd5 57.Ke7 Qe5 58.Kf7 c5 59.Qb3+– Ka5 60.Qe6 Qg5 61.Ke8+– Qg6 62.Kd7 c4?? 63.f7 Qh7 64.Kc8 Qh8 65.Kc7 Qf8 66.Qd5 b5+/– 67.Qd2 Ka4 1–0. Schoppmeyer,Herbert – Speer,Albrecht, OWL–ch Loehne, 1971.

4.e3 Be6 5.cd5 Bd5 6.Nf3 Nd7 7.Bb2 Bd6 8.Nc3 Be6 9.Ne4 Bc7 10.Neg5 Bg4 11.Qb3 Nh6 12.Bc4 0–0 13.h4 Qe7 14.Nh2 Bh5 15.g3 Nb6 16.Bd3 Rad8 17.Bh7+= Kh8 18.Bc2 Nd5 19.g4 Bg6 20.Bg6+/– fg6 21.0–0–0 Nf6?? 22.Qe6 Rfe8 23.Qe7 Re7 24.e4 Rd3? 25.Kc2+– Red7 26.Ne6 Bb8?? 27.Nf8 Rd8 28.Ng6 (28...Kh7 29.Nf8 Rf8 30.Kd3 Nhg4 31.Ng4 Ng4 32.Rdf1 Rf2 33.Rhg1+–) 1–0. Schmid,Hans Rudolf (1770) – Hennet,Jerome (1670), SUI–ch Hauptturnier II, 1999.

4.e3 Nf6 5.Bb2 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6 5.c4 c6).

3.a3 d6

4.Bb2 a5 5.b5=.

4.Bb2 g6 5.Nf3 Bg7 6.e3 Nd7 (6...Nf6 7.d4=) 7.Be2 Ne7 8.0–0 0–0 9.Nc3 a6 10.Qc2 b5 11.cb5 cb5 (11...ab5 12.d4=) 12.Rac1 Bb7 13.Rfd1 Rc8 14.Qb1 (14.d4 Nd5+=) 14...Nb6 15.d3 h6 16.Rd2 Nf5 17.Rdc2 Qd7 18.Nd1 (18.Kh1 d5=) 18...Rfe8 (18...Rc2 19.Rc2 Ne7 20.Qc1=) 19.Rc8 Rc8 20.Rc8 Qc8 21.e4 Nd4 22.Nd4+/– ed4 23.Qa1 d5 24.Bd4 Bd4 25.Qd4 Qe6 26.f3 Nd7 27.Kf2 Qe5 28.Qe5+– Ne5 29.Ke3 Nd7 30.Nc3 de4 31.fe4 Nb6 32.Bf3 Kf8 33.Kd4 Ke7 34.e5 Bf3 35.gf3 Ke6 36.Ke4 g5 37.h3 h5 38.f4 g4 39.hg4 hg4 40.f5 Ke7 41.Kf4 f6 42.ef6 Kf6 43.Kg4 Ke5 44.Ne4 Nd5 45.Kg5 Nc7 46.f6 Ne6 47.Kg6 Nf4 48.Kh7 Ne6 49.f7 Kf5 50.Kg8 Kg6 51.f8Q Nf8 52.Kf8 Kf5 53.Ke7 Ke5 54.Kd7 Kd4 55.Nc5 Kc3 56.Kc6 Kb2 57.d4 Ka3 58.Na6 Ka4 59.Kb6 Kb3 60.Kb5 (60.Kb5 Kb2 61.d5 Kc3 62.d6 Kd4 63.d7 Ke4 64.Nc5 Ke5 65.d8Q Kf5 66.Qd5 Kf4 67.Kc6 Ke3 68.b5 Kf4 69.b6 Kg3 70.b7 Kf4 71.b8Q Kg4 72.Qbg8 Kf4 73.Qgg5) 1–0. Fournier,Frederic – Fancelli,Luc, Ch Picardie, 2000.

4.Nc3 A) 4...Nf6 5.d4 ed4 6.Qd4 a5 7.b5=; B) 4...Be7 5.e4 (5.Nf3 f5 6.d4 e4 7.Nd2= –0.12; 5.d4 ed4 6.Qd4 Bf6 7.Qd2=) 5...Nf6 6.Nf3 a5 7.b5=; C) 4...Be6 5.e4 Nd7 6.Nf3 a5 7.b5=; D) 4...a5 5.b5 Nf6 6.d4 ed4 7.Qd4=.

3.a3 Nf6

4.Bb2 Qc7 5.Nc3 d6 6.e3 Be6 7.Rc1 a5 8.Nf3 ab4 9.ab4 Be7 10.Be2 0–0 11.Ng5 Bf5 12.g4 Bg6 13.e4 Ng4 14.Bg4 Bg5 15.h4 Bf4 16.h5 f5 17.hg6 fg4 18.Qg4 h6 19.Qe6 Kh8 20.Ne2 Na6 21.Nf4 (21.Bc3 Qd8=) 21...Rae8 (21...Rf4 22.c5 Re4 23.Kf1=+) 22.Rh6?? (Better is 22.Bc3+=) 22...gh6–+ 23.g7 Qg7 24.Ng6 Kh7 25.Nf8 Rf8 26.Qd6 Qg1 27.Ke2 Qf2 (27...Rf2 28.Kd3 Qg2 29.Qe7 Kg8 30.Bc3 Qg3 31.Kc2+–) 28.Kd3 Qf3 29.Kc2 Qe4 30.Kb3 Rf3 31.Bc3 b5?? (Better is 31...Rf7+=) 32.Qe7+– Kh8 (32...Kg6 33.Rg1 Kh5 34.Rh1 Kg6 35.Qe6 Rf6 36.Rg1 Kh5 37.Qf6 Qb1 38.Rb1 Nc5 39.bc5 bc4 40.Kc4 Kg4 41.Rg1 Kh5 42.Qe5 Kh4 43.Qh2) 33.Qe8 (33.Rg1 Rc3 34.dc3 Qc4 35.Kb2+–) ½–½. Quast,Michael – Volz,Harald (2015), Bayern–chI Bank Hofmann 1st, 1997.

4.Bb2 d5 5.Be5 (5.cd5 Qd5 6.Nc3 Qd6 7.e4+=) 5...dc4 6.Nf3 b5 7.d3 +=.

4.Bb2 d6 5.Qc2 a5 6.Nf3 ab4 7.ab4 +=.

4.Bb2 d6 5.Nc3 Bf5 6.Nf3 a5 7.b5=.

4.Bb2 d6 5.d4 e4 6.Nc3 Be7 7.d5=.

4.Bb2 d6 5.e3 Be7 6.d3 Be6 7.Nf3 h6 8.Be2 0–0 9.0–0 Nbd7 10.Nbd2 Re8 11.Qc2 Bf8 12.Rfe1 Qc7 13.Rac1 Rac8 14.d4 Bg4 15.de5 de5 16.h3 Bh5 17.c5 Bg6 18.e4 Bh7 19.Bd3 Rcd8 20.Nc4 g5 21.Qc3 Bg7 22.Nd6 Re7 23.Rcd1 Nh5 24.g3 Re6 25.Bc4 Re7 26.Rd2 Nhf6 27.Nf7 Rf7 28.Ne5 (28.Bf7 Kf7 29.Ne5 Ne5 30.Rd8 Qd8 31.Qb3 Ke7 32.Be5 Bg8 33.Bd6 Ke8+/–) 28...Ne5 29.Qe5 Qc8 30.Rd8 (30.Be6 Rd2 31.Bc8 Rd8+–) 30...Qd8 31.Qd6 (31.Bf7?! Kf7 32.Qd6 Qe7+–) 31...Qe8? (31...Qd6 32.cd6 Kf8 33.Bf7 Kf7+–) 32.Bf6 Bf6 (32...Bf8 33.Qe5 Qe5 34.Be5 Be7+–) 33.Qf6 Kf8 34.Bf7 Qf7 35.Qh6 Ke8 (35...Qg7 36.Qe6 Bg6 37.Rd1+–) 36.Qg5 Kd7 (36...Qd7+–) 37.Rd1 Kc7 (37...Qd5 38.ed5 a5 39.d6 Ke6 40.Re1 Be4 41.Re4 Kd7 42.Qe7 Kc8 43.Qe8) 38.Qd8 1–0. Fournier,Frederic (2175) – Airboy (1920), Chess.com, 2013.

4.Bb2 d6 5.e3 Be7 6.d4 e4 7.Nc3=.

4.Bb2 d6 5.Nf3 a5 6.Nc3 ab4 7.ab4=.

4.d4 ed4 5.Qd4 d5 6.cd5 cd5 7.Nf3=.

4.d4 e4 5.Nc3 (5.Bg5 Be7 6.Nc3 d5 7.cd5=) 5...Be7 6.Bf4 0–0 7.e3=.

3.Bb2 Bb4

4.Be5 d6?? 5.Bg7+– 1–0. DEFFM (2065) – Ustaoguzhan1 (1865), lichess.org, 2020.

4.Be5 f6 5.Bb2 Qb6 6.Qc2 Bc5 7.e3 Na6 8.a3 Ne7? (8...d5 9.d4 Bf5 A) worse 10.Qf5 Qb2 11.cd5 Qa1 12.dc5 Ne7–+; B) worse 10.dc5 Nc5 (10...Bc2? 11.cb6 dc4 12.Nd2+–) 11.Qc1 Nb3=+; C) 10.Qc3+=) 9.Bd3 (better 9.d4!?+–) 9...d5 10.Bh7?? (10.cd5!? cd5 11.Nc3+=) 10...dc4?? (better 10...Rh7 11.d4 Bf5–+) 11.Bg6= Kf8 12.Qc4?? (better 12.Be4=+) 12...Ng6–+ 13.Nf3 (13.Qc3 Ne5 14.Nf3 Nf3 15.gf3 Bd6–+) 13...Bf5 (better 13...Qb2 14.Qc3 Qc3 15.Nc3 Ne5–+) 14.Qc3 Rd8 (14...Nc7 15.d4 Bd6 16.Nbd2–+) 15.0–0 (15.d4 Bd6–+) 15...Qc7 16.d4 Be4 (16...Bd6!? 17.Kh1–+) 17.Nbd2 Nh4?? (better 17...Bf3 18.Nf3 Bd6–+) 18.Nh4+= Rh4 19.g3 Rg4 20.Ne4 (20.dc5 Rd5+=) 20...Re4 (20...Bd4!? 21.ed4 Re4=) 21.dc5+= Kf7 (21...Rd5!?+=) 22.Qb3 Rd5 23.f3 (better 23.Bd4!?+–) 23...Nc5= 24.Qa2 (24.Qc3!? Ra4 25.Rac1=) 24...Re3=+ 25.Rae1 (25.Bd4 Re6 26.Bc5 Rc5–/+) 25...Red3 (25...Qe7 26.Bc3–+) 26.Re2 (26.Bc1 Nb3–/+) 26...Qb6–+ 27.Kg2 Ne6 (27...Qb3 28.Qb1–+) 28.Rfe1 (28.Qc4 Rd2 29.Qe4 Re2 30.Qe2 Qb3–/+) 28...Ng5 (28...Rd2 29.h4–+) 29.Re7 (29.f4 Nf3 30.Rf1 Nd4 31.Bd4 Qd4–/+) 29...Kg6 30.f4 (30.Qb1!? Nf3 31.Rd1–+) 30...Rd2–+ 31.Kh1?? (31.R1e2 Qd8 32.R7e3–+) 31...Qf2 32.Qb1 Kh5 33.g4 (33.Qg6 Kg6 34.f5 Kh6 35.R7e2 Qf3 36.Kg1 Nh3) 33...Kh6 (33...Kh4 34.Qh7 Nh7 35.Bf6 Nf6 36.R7e2 Re2 37.Re2 Qf1) 34.fg5 (34.Qh7 Nh7 35.g5 Kh5 36.R7e2 Re2 37.Re2 Qf1) 34...Kg5 (34...Rg5 35.Qg6 Rg6 36.g5 Rg5 37.R7e2 Qf3 38.Rg2 Qg2) 35.Rg7 Kf4 (35...Kh4 36.Qh7 Rh5 37.Qh5) 36.Rf1 (36.Qe4) 36...Ke3?? (better 36...Rd1! 37.Qc1 Rc1 38.Bc1 Kf3 39.Rf2 Kf2=) 37.Rf2 (37.Re7 Re5 38.Rf2 Rf2 39.Be5 Rh2 40.Bh2 Kd4 41.Qb4 Kd5 42.Rd7 Ke6 43.Qd6) 37...Kf2 (37...Rd1 38.Qd1! Rd1 39.Kg2+–) 38.Qg1 Kf3 39.Qg3 Ke2 40.Re7 Kd1 (40...Re5 41.Be5 Rd1 42.Kg2 fe5 43.Qf2 Kd3 44.Rd7 Kc3 45.Qc5 Kb2 46.Rb7 Ka1 47.Qc3 Ka2 48.Qb2) 41.Qb3 (41.Re1 Kc2 42.Qc3) 41...Rc2 42.Re1! Kd2 (42...Ke1 43.Bc3 Double attack (43.Qc2 Deflection)) 43.Re2! Ke2 44.Qc2 Rd2 (44...Ke3 45.Bf6 a6 46.g5+–) 45.Qe4 Kd1 46.Bc3 Rc2 47.Qe1 1–0. GuestYKXH – guestsams, freechess.org, 2017.

4.Be5 f6 5.Bb2 d5 6.e3 dc4 7.Bc4 Nh6 8.Qh5 Kf8 9.h3 Qe7 10.Nf3 Bf5 11.0–0 Nd7 12.a3 Bc5 13.d4+= Bg6 14.Qh4 Bd6 15.Nbd2 Bc2 16.e4 Ba4 17.Rfe1 b5 18.Ba2 Nf7 19.e5 g5?? 20.ed6 Qe1 21.Re1 gh4 22.Re7 Rd8 23.Rf7 Ke8 24.Bc1 Bc2 25.Ne4! Be4 26.Re7 Kf8 27.Bh6# 1–0. pumpkin (2300) – rudycfls (1865), net–chess.com, 2005.

4.Be5 f6 5.Bb2 Ne7 6.Qb3 c5 7.Nf3 Nbc6 8.a3 Ba5 9.e3 d6 10.Be2 Bc7 11.0–0 Na5 12.Qd1 Be6 13.d3 0–0 14.Nbd2 b6 15.d4 Nb7 16.d5 Bd7 17.Qc2 Qe8 18.Bd3 g6 19.Qc3 Nd8 20.Ne4 Qf7 21.Nfg5 Qg7 22.Nf6 Rf6 23.Qf6 Qf6 24.Bf6 Nf5 25.Nf3 Nf7 26.e4 Ng7 27.Rfe1 Nh5 28.g3 Nf6 29.Nd2 Ne5 30.Be2 Re8 31.f4 Nf7 0–1. Hilton,Stephen – Hasler,Ulrich, corr or01–013, 2001.

4.Be5 f6 5.Bc3 Bc3 6.Nc3 Ne7=.

4.Be5 Nf6 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 c6).

4.Be5 Nf6 5.e3 0–0 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0–0 5.e3 c6).

4.Be5 Nf6 5.e3 0–0 6.Nf3 d5 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0–0 5.e3 d5 6.Nf3 c6).

4.Be5 Nf6 5.Nf3 0–0 6.e3 d5 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0–0 5.e3 d5 6.Nf3 c6).

4.Be5 Bf8 5.Nf3 Qb6 6.e3 f6 (6...d6 7.Bd4 c5 8.Bc3+=) 7.Bd4 Bc5 (7...c5 8.Bc3+=) 8.Bc3 (8.Bc5 Qc5 9.d4 Qa5 10.Nbd2 Na6+–) 8...Na6 (8...Be7 9.d4+=) 9.Nd4 (9.d4 Bb4+–) 9...Bd4 (9...d6 10.Bd3+=) 10.Bd4 c5 11.Bc3 d6 (11...Ne7 12.Qh5 g6 13.Qf3+=) 12.Qh5 Kf8 (12...g6 13.Qf3+=) 13.Bd3 (13.Be2 Nb4 14.Bb4 Qb4+–) 13...Be6 14.Na3 Nb4 15.Qe2 (15.Be4 Ne7+–) 15...Qa5 (better 15...d5!? 16.Bb4 Qb4+=) 16.Nb5+– Rc8 (16...Qb6 17.Bb4 cb4 18.Be4+–) 17.Nd6+– Rc7 (17...Nd3 18.Qd3 Qd8 19.e4+–) 18.Bb4 (18.Be4 Qa4+–) 18...Qb4 (18...cb4 19.Nb5 Rd7 20.0–0+–) 19.0–0 (19.Rb1 Qa5+–) 19...a6? (better 19...Qb6 20.Nb5 Rd7+–) 20.Rfb1 Qa3 (20...Qa4 21.Rb7 Rb7 22.Nb7+–) 21.Rb3 (21.Be4 Ke7 22.Nb7 Qa4+–) 21...Qa4 22.Rb7 Rb7 23.Nb7 Qa3 24.Be4 Ne7 (24...Nh6 25.Qd3 Qd3 26.Bd3+–) 25.d4 (better 25.Qd3 Qd3 26.Bd3 Kf7+–) 25...Bf5 (25...cd4 26.Rd1 f5+–) 26.Bf5 Nf5 27.Qf3 (27.Nc5!? Kf7+–) 27...Qb2 28.Rd1 (28.Rf1 cd4 29.Nc5 de3 30.Qf5 ef2 31.Rf2 Qa1 32.Rf1 Qd4 33.Kh1 Qd6+–) 28...Ne7 (28...cd4 29.ed4 (worse 29.Qf5 Qb7 30.Rb1 Qc7+–) 29...Qc2 30.d5+–) 29.Nc5 (better 29.Nd6 Qb8 30.Qe4 Qd6 31.Qa8 Kf7 32.Qh8+–) 29...Qa2 (29...Qc2 30.Ne4+–) 30.Ne6 White intends d5 (better 30.Qa8 Kf7 31.Qh8+–) 30...Kf7 31.d5 (better 31.Qg4!? Qc2 32.d5 g6+–) 31...Qc4 32.Qg3 (better 32.e4+–) 32...Rc8?? (better 32...Rg8+–) 33.Qg7+– Ke8 34.Qf8 (better 34.d6 Qe6 35.de7+– (35.Qe7?! Qe7 36.de7 Ke7+–)) 34...Kd7 35.Qf6 Qc1 (35...Qe2 36.Qd4 Rc4 37.Qa7 Ke8 38.Qb8 Rc8 39.Qb3+–) 36.Rf1 (36.Qf3 Qb2 37.Nf8 Rf8 38.Qf8 Qc2+–) 36...Qd2 (36...Qc4 37.Nf4 Rc5 38.Qe6 Kd8 39.d6+–) 37.Nf8 Ke8 (37...Rf8 38.Qf8 Qd5+–) 38.d6 Nd5 (38...Qd6 39.Qd6 Kf8 40.Qa6 Rc6+–) 39.d7 1–0. GuestJJTB – latinsoul, freechess.org, 2018.

3.Bb2 Qc7

4.Nf3 d6 5.h3 (5.Nc3 Nf6=) 5...Nf6 6.e3 Be7 7.Be2 e4 8.Nh2 (8.Nd4 d5=+) 8...0–0 9.0–0 (9.Ng4 Nbd7=+) 9...Be6 (9...d5 10.c5=+) 10.Qc2 (10.d3 d5=+) 10...Nbd7 (10...a5 11.f3=+) 11.d4 (11.f4 g6=) 11...d5 (better 11...a5=+) 12.Nd2 (better 12.c5!?=+) 12...Bb4–/+ 13.cd5 (13.Rfb1 Rfe8–/+) 13...Bd5 14.Ng4 Ng4 15.Bg4 f5 (15...Nf6 16.Be2–/+) 16.Be2 Rae8 (16...Rad8 17.Bc3 Bd6 18.Rab1–/+) 17.Nb3 (17.Bc3 Bc3 18.Qc3 f4–/+) 17...Bd6 (17...f4 18.Nc5–+) 18.Bc4 (18.Nc5 f4–+) 18...Nb6 19.Bd5 (19.Be2 f4–+) 19...cd5 (19...Nd5 20.Rae1–+) 20.Qc7–/+ Bc7 21.Nc5 (21.Ba3 Rf7–+) 21...Nc4 22.Bc3 (22.Rfb1 b6 (22...Nb2?! 23.Rb2 b6 24.Na6=+) 23.Na4 f4–+) 22...b6 (22...f4 23.ef4 b6 24.Nb3 Bf4 25.Rae1–+) 23.Na6 Bd6 (23...Rc8 24.Rfc1–+) 24.a4 (24.Bb4 Rf6–+) 24...Rc8 (24...f4 25.ef4 Bf4 26.Nb4–+) 25.Bb4 Rfd8 (25...Rf6 26.Rfc1–+) 26.Bd6 (26.Rfc1 Kf7–+) 26...Rd6 27.Rac1 Kf7 28.f3 ef3 (28...Ke6 29.Kf2–+) 29.Rf3 Rf6 30.Nb4 Ke6 31.Kf2 (31.Nd3 g5–+) 31...a5 (31...Rff8!? 32.Rg3 g6 33.Ke1–+) 32.Nd3–/+ Rb8 33.Ke2 b5 (33...Kd6 34.Rb1–/+) 34.ab5 Rb5 The passed pawn on a5 will quickly become a dangerous weapon 35.Rff1 (35.Rcf1!?–/+) 35...Kd6–+ 36.Rb1 (36.Ra1 Rg6 37.Rf5 Rg3–+) 36...Rb1 37.Rb1 Re6 38.Nf4 (38.Ne5 Ne5 39.de5 Ke5–+) 38...Re3 39.Kf2 g5 40.Ne2 a4 41.Rb6 (41.Ng3 Ke6–+) 41...Nb6 42.Ke3 a3 43.Nc3 Nc4 44.Kf3 Ke6 (44...h5 45.g3–+) 45.g4 (45.Na2 f4–+) 45...Nd2 (45...f4 46.Na2 Nd2 47.Ke2–+) 46.Ke2 Nb3 47.Kd3 (47.gf5 Kf5 48.Kd3–+) 47...f4 48.Na2 f3 49.Ke3 Nd4! 50.Nc1 (50.Kd4 Deflection from f2 50...f2) 50...Nc2 (better 50...Kd6 51.Na2–+) 51.Kf3 Nb4 52.Ke3 (52.Nb3 a2–+) 52...a2 53.Nb3 Nc2 (53...Nc2 54.Kd2 a1Q 55.Na1 Na1–+) 0–1. Hirt,Robert – Peters, corr DDR, 1984.

4.Nf3 f6 5.a3 a5 6.b5 cb5 7.cb5 d6 (7...d5 8.Nc3 Be6 9.Rc1+=) 8.e4 (8.Nc3 Be6+=) 8...Bg4 (8...f5 9.Nc3 Nf6 10.Rc1+=) 9.Nc3+– Ne7 10.Rc1 Qd8 (10...Qb6 11.h3 Bh5 12.Be2+–) 11.Bc4+– Nd7 (11...f5 12.h3 Bf3 13.Qf3+– (13.gf3?! Nd7+–)) 12.Ng5! Bd1?? (12...fg5 13.Qg4 Discovered attack) 13.Bf7 1–0. DEFFM – GuestSLRD, freechess.org, 2018.

3.Bb2 d6

(--> 1.b4 e5 2.Bb2 d6 3.c4 c6).

4.e3 (--> 1.b4 e5 2.Bb2 d6 3.e3 c6 4.c4).

4.e3 f5 5.Nf3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 c6).

4.e3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 c6).

3.Bb2 Bd6

(--> 1.b4 e5 2.Bb2 Bd6 3.c4 c6).

4.Nf3 Qe7 (--> 1.b4 e5 2.Bb2 Bd6 3.Nf3 Qe7 4.c4 c6).

3.Bb2 e4

4.Qc2 d5 5.e3 (--> 1.b4 e5 2.Bb2 e4 3.e3 d5 4.c4 c6 5.Qc2).

4.c5 b6 5.d4 (5.Qc2 f5=) 5...bc5 (5...d5 6.e3+=) 6.dc5= Nf6 (6...a5 7.Qa4=) 7.e3 (7.Be5 Ng4 8.Bd4 e3 9.fe3 d6+=) 7...a5 (7...d6 8.Bc4=) 8.a3 (8.Qa4 Ba6=) 8...ab4 (8...d5 9.Nd2=) 9.ab4 Ra1 10.Ba1 Ba6 (10...d6!?+=) 11.Ba6 (11.Be5 d6 12.cd6 Bf1 13.Kf1 Nbd7=) 11...Na6 12.Qa4 Nc7 13.Nc3 (13.Nd2 Ncd5+=) 13...Qa8= 14.Qa8 Na8 15.Nge2 Nc7 16.Kd2 d5 (16...d6 17.Ng3 d5 18.Nce2+=) 17.Na4 (17.Nd4 Kd7 18.Na4+=) 17...Be7 (better is 17...Ng4!? 18.Nd4 Ne5+=) 18.Nd4+/– Ng4 19.f3 (19.Nc6 Nf2 20.Rb1 Nd3+/–) 19...Ne5 20.fe4 (20.Ke2 Bf6+/–) 20...de4 21.Nf5 Bf6 22.Nd6 Ke7+= 23.Be5 Be5= 24.Ne4 Nd5+= 25.g3 Nb4 26.Rb1= Rb8 27.Nec3 Bc3 28.Nc3= Rd8 29.Ke2 Nd5 30.Rb7 Kf8 31.Nd1 Re8 32.Kd3 f5 33.Kd4 h6 34.h3 h5 35.h4 Re4+= 36.Kd3 Rg4 37.Rb8 Kf7 38.Rc8 Rg3 39.Kd4? Rg4 40.Ke5 Ne7 41.Rc7 Re4 42.Kd6 Re6 43.Kd7 Re5 44.Rc6? Nc6 45.Kc6 Ke6 46.Kb6 Kd7 47.Nc3 Re3 48.c6 Kc8 49.Nd5 Re4 50.c7 f4 51.Kc6 Re6 52.Kc5 Re5 (52...Re5 53.Kd4 Rd5 54.Ke4 g5 55.Kd5 f3 56.hg5 f2–+) 0–1. Florio – Pini,Loris, corr, 1972.

4.c5 d6 5.cd6 Bf5 6.Qc2 +=.

4.e3 f5 5.c5 (5.Nc3 Nf6 (worse 5...Bb4 6.Ne4 Qe7 7.Qh5 g6 8.Qd1+–) 6.b5 Bc5+=) 5...Nf6= 6.Nh3 b6 (6...a5 7.Bc4 b5 8.Bb3=+) 7.d4 (7.Nf4 d5 8.Bd4 bc5 9.bc5 Kf7=) 7...ed3 (7...a5 8.Bc4=) 8.Bd3= bc5 9.0–0 (9.Bf5 g6 10.Bd3 d5=) 9...cb4 10.Bf5 d5 (10...Ba6!? 11.Re1 g6+=) 11.Bf6+= gf6 (11...Qf6? 12.Bc8 Qa1 13.Bb7+–) 12.Qh5 Ke7 13.Bc8 Qc8 14.Nd2 a5? (14...Qe8 15.Qh4 Kf7 16.e4+–) 15.Nf4 (15.e4 Qe8 16.Qh4 Qg6 17.ed5 Rg8+–) 15...Nd7? (better 15...Qe8 16.Qh4 Kf7+–) 16.Rac1+– Ne5?? (16...Nb6 17.Nb3 Qe8 18.Qe8 Ke8 19.Rc6 Na4 20.Nd5 Nc3 21.Nc3 bc3 22.Rc3 Kf7+–) 17.Nd5! Kd6 (17...cd5 18.Rc8 Pinning (18.Rc8 Deflection)) 18.Nb6 (better 18.f4 Nf3 19.Nf3 Qe8+–) 18...Qa6 (18...Qe8 19.Ne4 Ke7 20.Qf5+–) 19.Na8 Qa8 20.f4 Nd3 (20...Ng6 21.Nc4 Kc7 22.Rfd1+–) 21.Ne4 (better 21.Qf7 c5 22.Nc4 Kc6 23.Qf6 Kc7+–) 21...Kc7 22.Qf7 (better 22.Rc2 Kb6 23.Rd1 b3+–) 22...Kb6 23.Rc4 Qb7 (23...f5 24.Nf6 Nc5 25.Rc5 Bc5 26.Nd7 Ka6 27.Nc5 Kb6+–) 24.Qf6 Rg8 (24...Bg7 25.Qd6 Nb2 26.Qc5 Ka6 27.Qc6 Qc6 28.Rc6 Kb5+–) 25.Qd8 (25.Qd8 Ka7 26.Qd3+–) 1–0. DEFFM – GuestHBNR, freechess.org, 2019.

4.e3 Nf6 5.a3 d5 (--> 1.b4 e5 2.Bb2 e4 3.e3 d5 4.a3 Nf6 5.c4 c6).

4.e3 Nf6 5.Bf6 Qf6 6.Nc3 Bb4 7.Ne4=.

3.Bb2 f6

(--> 1.b4 e5 2.Bb2 f6 3.c4 c6).

4.a3 d5 5.cd5 cd5 6.e3 Be6 7.Nc3 Bd6 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 Bd6 5.c4 c6 6.cd5 cd5 7.Nc3 Be6).

4.a3 d5 5.e3 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 c6 5.c4).

4.a3 d5 5.e3 Be6 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 Be6 5.c4 c6).

4.b5 (--> 1.b4 e5 2.Bb2 f6 3.b5 c6 4.c4).

4.b5 d5 5.e3 (--> 1.b4 e5 2.Bb2 f6 3.b5 d5 4.e3 c6 5.c4).

4.b5 d5 5.e3 Be6 (--> 1.b4 e5 2.Bb2 f6 3.b5 d5 4.e3 Be6 5.c4 c6).

3.Qb3 d5

4.e3 Be6 5.Bb2 Bd6 6.Nf3 Nd7 7.d3 Ngf6 8.d4 e4 9.c5 ef3 10.cd6 fg2 11.Bg2 –/+.

4.e3 Be6 5.Bb2 Bd6 6.Nf3 Nd7 7.d3 h6 8.Nbd2 Ngf6 9.c5 Bc7 10.Qc2 0–0 11.Be2 a5 12.a3 Qe7 13.0–0= Rfc8 14.e4 d4 15.Rfc1 b6 16.cb6 Bb6 17.ba5 Ra5 18.Nc4 Bc4 19.Qc4 Bc5 20.Qb3 Rca8 21.g3 Ba3–/+ 22.Ba3 Ra3 23.Ra3 Qa3 24.Qa3=+ Ra3 25.Rc6 Kf8 26.Rc7 Ra5 27.Nh4 Ra1 28.Bf1 g6–/+ 29.Rc2 Ne8 30.f4 f6 31.Ng6 +=. Kjaerstad,Eivind J – Bangsgaard,Carsten, corr Nordisk cup, 1991.

4.e3 Be6 5.Bb2 Bd6 6.Nf3 Nd7 7.d4 e4 8.c5 Bc7 =+.

4.e3 Be6 5.Bb2 Bd6 6.Nf3 Nd7 7.d4 e4 8.Nfd2 Qg5 9.g3 (9.Nc3 Ngf6=+) 9...Ne7 10.h4 Qg6 11.a4 Bg3?? (better is 11...dc4!? 12.Bc4 Bc4 13.Nc4 Nd5–/+) 12.Rg1 (12.h5 Qg4 13.fg3 Qg3 14.Kd1 dc4 15.Bc4 Bc4 16.Qc4=+) 12...Bf2= 13.Kf2 Qh5 (13...Qf6 14.Ke2 Qh4 15.Kd1=) 14.Rh1 Nf5 15.Be2 Qg6 16.Nf1 (16.Rg1 Qh6 17.h5 dc4=) 16...Qf6 (16...dc4 17.Qc2=) 17.Ke1 Nh4 18.Rh2 Qg5 (18...Nf3 19.Bf3 ef3 20.Nbd2=) 19.Nc3 Nf6 20.cd5 cd5 21.Kd2 (21.Nb5 Kd7+=) 21...Nf3= 22.Bf3 ef3 23.Rf2 (23.Nb5 Ne4 24.Kd1 Kd8–/+) 23...Qg1 (23...Rc8 24.Kd1=) 24.Ke1 Ng4 25.Rf3 Nh2 26.Rf2 Nf1 27.Ne2 Nd2 28.Ng1 Nb3 29.Ra3 h5 30.Rb3+= h4 31.Ne2 g5= 32.Kf1 Kd7 33.e4 de4 34.Re3 Bc4 35.d5= Rh7 36.Re4 Bd5 37.Rd4 Ke6 38.Nc3 Bc6 39.b5 h3? 40.Kg1 Bg2= 41.Kh2 f5 42.Re2 Kf7 43.Nd5 Be4 44.Nf6!+/– Rh4? 45.Ne4+– fe4 46.Rde4 Re4 47.Re4 Rc8 48.Kh3 a6 49.Kg4 ab5 50.ab5 b6 51.Kf5 Rc5 52.Re5 Rc2 53.Ba3 (53...Rg2 54.Re7 Kg8 55.Kg6 Re2 56.Re2 g4 57.Re8#) 1–0. Franke – Pentzien,Volker, corr DDR, 1990.

4.e3 Nf6 5.Bb2 Bd6 6.c5 Bc7 7.d4 (7.Nf3 Nbd7=+) 7...ed4 (7...e4 8.b5=+) 8.Bd4 0–0 9.Bd3 Bg4 10.h3 Bh5 11.Nd2 Bg6 12.f4 (12.Ngf3!?=) 12...Bd3 13.Qd3 Nbd7 (13...Re8 14.0–0–0=+) 14.Ngf3= Re8 15.0–0 Ne4 16.Rad1 a5 17.a3 Qe7 18.Nb3 (18.Ra1 Ndf6=+) 18...ab4–/+ 19.ab4 Ra4 20.b5 (20.Nbd2 Rb4 21.Ne4 Qe4 22.Qe4 A) 22...de4 23.Bc3 Rb3 24.Rd7 ef3 25.Rc7 (< 25.Rf3 Rc3 26.Rc7 Rc5=) 25...Rc3 26.Rf3=+; B) 22...Re4–/+) 20...Ndc5–+ 21.Nc5 Nc5 22.Qc2 Rc4 23.Qb2 Na4 24.Qa1 cb5 25.Rde1 Bb6 26.Bg7–/+ Rf4 27.Bh6 Rf6 28.Bg5 Bd8 29.Bh4 Qe6= 30.Bf6 Bf6 31.Nd4 Qe5 32.Qd1 Bg5 33.Qg4 h5 34.Qf5 Qf5= 35.Nf5 h4 36.Rf3 b4 37.Rb1 Re4 38.Nd6 Nc3 39.Ra1 Re7 40.Ra8 Kh7=+ 41.Nf5 Rc7 42.Nd4 Ne4–/+ 43.Kh2 Bf6 44.Ne2? Rc2 45.Nf4–/+ Nd2 46.Rf2 Be5 47.Ra7 d4–/+ 48.Rb7 de3 49.Rf7 Kg8 (50.Rd7 ef2 51.Rd8 Kh7 52.Rh8 Kh8 53.g3 Bf4 54.gf4 f1Q 55.f5 Ne4) 0–1. NN – REXChess, 1994.

4.e3 Nf6 5.Bb2 Bd6 6.cd5 Nd5 7.Bc4 Be6 8.e4 Nf4 (worse 8...Nb4 9.Be6 fe6 A) worse 10.Qe6 Be7 11.Be5 Nc2 12.Ke2 Qd7 13.Qd7 Nd7 (13...Kd7?! 14.Nf3=) 14.Bg7 Rg8–/+; B) 10.a3+–) 9.Be6 Ne6 (worse 9...fe6 10.g3 Ng6 11.Qe6 Qe7 12.Qe7 Ke7 13.h4+=) 10.Nf3 Nd7 11.0–0 0–0 12.Na3 Qf6 13.Nc4 The pressure on e5 grows 13...Bc7 14.Ne3 (14.Qc2 Rfe8=) 14...Rad8 (14...Rfd8 15.Qc2=) 15.Qc2 (15.Nf5 g6 16.Nh6 Kg7=) 15...a6 (15...Rfe8 16.Rfc1=+) 16.Rad1= Qg6 (16...Rfe8 17.d4 Nd4 18.Nd4 ed4 19.Rd4= (worse 19.Bd4 Qf4 20.g3 Qe4–/+)) 17.d4 ed4 18.Nd4 Nd4 19.Bd4 Qh6 20.g3 Be5 (20...Qe6 21.Nf5 Be5 22.Be5 Ne5 23.f4=) 21.Be5+= Ne5 22.f4 Nd7 23.Nf5 Qh5 24.e5 (24.Nd6 Nf6+=) 24...Nb6= 25.Ne7 Kh8 26.Rd6 Rd6 27.ed6 Nd5 28.Nd5 Qd5 29.Rd1 Qe6 30.Qd2 Qd7 31.Re1 Re8 (31...Qd8 32.Re7 Qb6 33.Qe3+–) 32.Re8 Qe8 33.Kf2 (33.d7 Qd8+–) 33...Kg8+– 34.d7 Qd8 35.Qd6 f6 36.g4 Kf7 37.g5! fg5 38.fg5 Kg8 (38...Qb6 39.Kf3 Qd8 40.Kf4+–) 39.h4 (39.h4+–) 1–0. Simmelink,Joop Theo – Malmstroem,Jan, corr Kuhlmann mem, 1999.

4.Nf3 dc4 5.Qc4 Be6 =+.

3.b5

3.b5 (--> 1.b4 e5 2.b5 c6 3.c4).

3.b5 cb5 4.cb5 (--> 1.b4 e5 2.b5 c6 3.c4 cb5 4.cb5).

3.Nf3 Bb4?!

4.Ne5 d6 5.Nd3=.

4.Ne5 Nf6 5.Qb3 =+.

2.c4 e6

3.a3 a6 4.Bb2 h6 5.e3 Qg5 (5...a5!?=) 6.Nf3+/– Qe7 7.d4 b5 8.c5 Qf6 (8...a5 9.ba5 Ra5 10.a4 Ra4 11.Ra4 ba4 12.Nc3+/–) 9.Bd3 d6 10.0–0 (10.Nc3 a5+/–) 10...dc5+= 11.bc5 Bc5 12.Qc2 (12.dc5?! Qb2 13.Nbd2 Nf6=) 12...Be7?? (better is 12...Bd6+/–) 13.d5!+– e5 (13...cd5 14.Bf6; 13...ed5 14.Bf6 Discovered attack) 14.Be5 (14.Ne5?! Qd6+–) 14...Qf3 (14...Bb7 15.Rc1+–) 15.gf3 Bf6 16.Bf6 Nf6 17.dc6 0–0 18.Nd2 Be6 (18...Bh3 19.Ne4 Nd5 20.Rfc1+–) 19.Ne4 (better is 19.a4!? b4 20.c7 Nbd7 21.Ba6 Nb6+–) 19...Nd5 20.Nd6 Nc7 (20...Ra7 21.Bh7 Kh8 22.Qc5 Nc6 23.Be4+–) 21.Bh7 (21.Rfd1 Bd5+–) 21...Kh8 22.Be4 Rd8 (22...a5 23.Rfb1+–) 23.Rfd1 Kg8 (23...Rf8 24.Qc5 Kg8+–) 24.Bh7 Kf8 25.Nb7 (25.Qc5 Nd7 26.cd7 Rd7 27.Nf5 Ke8 28.Rd7 Kd7 29.Qd6 Kc8 30.Ne7 Kb7 31.Qc6 Kb8 32.Qb6) 25...Rd1 (25...Rd5 26.Rd5 Nd5 27.c7+–) 26.Rd1 Ke7 27.Qc5 Kf6 28.f4 (28.Qd4 Kg5 29.Qe5 Kh4 30.Rd4 Bg4 31.Rg4 Kh3 32.Qg3) 28...g6 29.Qe5 (29.Qd4 Kf5 30.h3 Nc6 31.Nd6) 29...Ke7 30.Bg6 (30.Qd6 Kf6 31.Qd4 Kf5 32.h3 Nc6 33.Nd6) 30...fg6 31.Qc7 Kf6 (31...Nd7 32.cd7 Kf6 33.Qe5 Kf7 34.Nd6 Ke7 35.Qg7 Bf7 36.Qf7 Kd8 37.Rc1 b4 38.Qe8) 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

3.a3 b5 4.e4 bc4 5.Bc4 Qb6 6.d4 a5 7.ba5 Qa5 8.Bd2 Qb6 9.Nf3 d5 10.ed5 cd5 11.Be2 Nc6 12.Bc3 Nf6=+ 13.0–0 g6 14.a4= Bg7 15.Bb5 Bd7 16.Na3 0–0 17.Rb1 Ne4=+ 18.Ba1 Qa7 19.Rc1 Rfc8 (20.Ne5 Qb7=+; 19...Nb4 20.Bb2=+). alaamattar (2230) – rwgambit (2110), net–chess.com, 2005.

3.Qb3 a5 4.b5 Nf6 5.Bb2 a4 6.Qc2 a3 7.Bc1 d5 8.e3 Bb4 9.Nf3 0–0 10.Be2 Qa5 11.bc6 Nc6 12.0–0 Rd8 13.d4= dc4 14.Bc4 e5 15.de5 Ne5–/+ 16.Nd4 Bg4 17.f3 Rdc8 18.fg4 Rc4 19.Qe2 Ne4 20.Nb3 Qc7 21.Bd2 Bc5 22.Rf5 Nd2 23.N1d2 Ng4 24.g3 Be3 25.Kg2 Qc6 26.Rf3 Bd2 27.Nd2 Re8 (28.Qc4 Ne3 29.Kg1 Nc4–+ (< 29...Qc4 30.Nc4 Nc4 31.Rc3+/–)) 0–1. RageofKlugman – PeterRs, ChessWorld.net, 2006.

3.Qb3 d5 4.d3 Nf6 5.Bg5 Nbd7 6.d4 (6.Nf3 h6 7.Bd2 dc4 8.dc4 Ne4=+) 6...h6 (6...dc4 7.Qc4 Nb6 8.Qd3 Bb4 9.Bd2–/+) 7.Bh4 (7.Bf6 dc4 8.Qc4 Nf6=+) 7...Be7 (7...dc4!? 8.Qc4 Nb6–/+) 8.c5 0–0 9.a4 (9.Nf3 a5=+) 9...b6 10.a5 bc5 11.bc5 Rb8 12.Qc2 Ba6 (12...e5 13.Nf3–/+) 13.Nf3 Ne4 14.Bg3 Ng3 15.hg3 Bf6 16.Nbd2 g6 (better 16...e5!? 17.e3 ed4 18.Nd4 Bd4 19.ed4 Re8 20.Kd1 Bf1 21.Rf1 Rb5–/+) 17.Rh6= Bg7 (17...e5 18.de5 Ne5 19.Ne5 Be5 20.Ra2=) 18.Rh3 (18.Rh4 e5 19.e3 ed4 20.Nd4 Bd4 21.Rd4 Bf1 22.Kf1 Rb5=) 18...Nf6 (18...e5 19.de5 Ne5 20.Ra2=) 19.Ng5 (19.Ne5!? Qc7 20.e3 Bf1 21.Kf1+–) 19...Ng4 20.e3?? (20.Ndf3 Bd4 21.Nd4 Qg5=) 20...Qg5?? (better 20...Bf1 21.Nh7 Bg2–+) 21.Ba6=+ Qf6 (better 21...Ne3 22.fe3 Qe3 23.Kd1 Bd4=+) 22.Nf3+– e5 23.Rh4 ed4 24.Rg4?? (better 24.Nd4 Ne5 25.Ke2+–) 24...d3!–+ 25.Bd3? (25.Bd3 Qc3 Double attack (25...Qa1 Discovered attack); 25.Qd3 Qc3 Double attack (25...Qa1 Discovered attack)) 25...Qa1 26.Ke2 (26.Qd1 Bc3 27.Ke2 Rb2 28.Bc2–+) 26...Rb2 (26...Qa5?! 27.Ra4 Qc7 28.Nd4–+) 27.Qb2 (27.Nd4 Bd4 28.Rd4 Rc2 29.Bc2 Qa5–+) 27...Qb2 28.Kf1 (28.Kd1 Qf2 29.Rb4 Qe3–+) 28...Qc1 29.Ne1 Bc3 (29...Bc3 30.Ke2 Qe1 31.Kf3 Rb8–+) 0–1. afsharian – TRON120P0, lichess.org, 2018.

3.b5 c5 4.Bb2 Nf6 5.Nf3 h6 6.e3 d6 7.Bd3 Nbd7 8.Qc2 a5 9.Nc3 b6 10.Be4 Rb8 11.Bc6 Bb7 12.Ne4 Ne4 13.Qe4 Bc6 14.bc6 Nf6 15.Bf6 Qf6? (better 15...gf6!? 16.d4 d5 17.cd5 Qd5 18.Qd5 ed5 19.dc5 Bc5+=) 16.c7+– Rc8 (16...Qa1?? 17.Ke2 Rc8 18.Qc6 Ke7 19.Ra1+–) 17.Qc6 Ke7 18.0–0 g5 (18...e5 19.d4 Qe6 20.Qb6+–) 19.Rab1 Bg7 (19...Qg6 20.Rb6 Qd3+–) 20.Rb6 e5 (20...Qf5 21.Qd6 Kf6 22.d4+–) 21.d4! e4 (21...cd4 22.c5 Combination; 21...ed4 22.ed4 Decoy) 22.dc5 ef3 23.cd6 Qd6 24.Qd6 (24.Qd6 Ke8 25.Rb8 Bf6 26.Rc8 Bd8 27.cd8Q) 1–0. DEFFM – GuestMXVK, freechess.org, 2019.

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

3.b5 Ne7 4.Bb2 f6 (4...d5 5.e3=) 5.a4 (5.e3 e5=) 5...d5 6.e3 Kf7 (6...e5 7.d4 Nd7 8.Nf3=) 7.Nf3 e5 8.cd5 cd5 9.Be2 (9.d4 e4 10.Nfd2 Be6+=) 9...Be6 10.0–0 Nd7 11.d3 (11.d4 e4 12.Nfd2 Rc8+=) 11...Ng6 12.Nbd2 Bd6 13.Rc1 Qe7 14.h3 Rhc8 15.Rc8 Rc8 16.a5 Kg8 17.Qa4 f5 18.Rc1 Rc1 19.Bc1 Nf6 20.Ng5 Bd7 21.Bb2 a6 (21...Qe8 22.d4 e4 23.Qb3–/+) 22.Qc2 Bb5 23.Qc8 Nf8 24.Ndf3? (better 24.Ngf3!? Qd7 25.Qc2–/+) 24...h6–+ 25.Ne5 (25.d4 e4 26.Bb5 ab5 27.Qf5 hg5–+) 25...Be5 (25...hg5?! 26.Qf5 Bc7 27.Bf3–/+) 26.Be5 Qe5 (26...hg5?! 27.Qf5 N8d7 28.Bf6 Nf6 29.Qc8 Kh7 30.Qc3–/+) 27.Nf3 Qa1 28.Kh2 Qa5 29.Qb7 Qc3 30.Nd4 Bd3 31.Bf3 f4! 32.Bd5 (32.ef4 Qd2 Double attack (32...Qd4 Deflection; 32...Qd2 Decoy)) 32...Kh7 33.Nf5 (33.Qb3 Nd5 34.Qd5 fe3 35.fe3 Qc7 36.g3–+) 33…Bf5 (33...Bf5 34.ef4 Qd2–+) 0–1. GuestHGBN – GuestNCKT, freechess.org, 2017.

3.b5 Nf6 4.Bb2 cb5 5.cb5 d5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 cb5 6.cb5).

3.c5 a5 4.d4 ab4 5.Bb2 b6 6.Nd2 bc5 7.dc5 Nf6 8.Nb3 Na6 9.Qd4 Qe7 10.Qh4 e5 11.Nf3 Nc5 12.Be5 Nce4 13.Bf6 Nf6 14.Qc4 c5 15.e3 d5 16.Qc2 c4 17.Nbd4 Bd7 18.Be2 Ba4 19.Qb2 Qe4 20.0–0 c3 21.Qc1 c2 22.Ne1 Bd6 23.Bd3 Qh4 24.Nef3 Bh2?? (better is 24...Qh5=) 25.Nh2+– 0–0 26.Nhf3 Qh5 27.Qb2 Ne4 28.Nc2 Bc2 29.Bc2 Nc3 (29...Ra6 30.Qe5 Qe5 31.Ne5 Nc3+–) 30.Rfe1 Rfc8 31.Qb4 Ra2 32.Ra2 Na2 33.Qb7 Rf8 34.Qb3 d4 35.Qa2 de3 36.Re3 Qh6 (36...Qb5 37.Ne5 Qb4 38.Bh7 Kh7 39.Rh3 Kg8 40.Ng6 Qe1 41.Kh2 Qe5 42.g3 Qg3 43.Kg3 Re8 44.Rh8) 37.Bf5 (better is 37.Ne5!? Qe6 38.Bb3 Qc8 39.Bf7 Kh8+–) 37...Qf4 38.Qc2 Qh6 39.Qe4 g6 40.Bh3 Rd8 41.Qc6 Qf8 42.Qf6 Rd1 43.Kh2 Rc1 (43...Qd6 44.Qd6 Rd6 45.g4+–) 44.Re7 (44.Rd3!? h5+–) 44...Rc2 (44...Rc6 45.Qe5 Rc2+–) 45.Bd7 Qh6 46.Kg3 Qf8 47.Be8 Qe7 48.Qe7 Kg7 49.Qf7 Kh6 50.Qf8 Kh5 51.Qf4 Rc3 52.Qg5# 1–0. Crux_043b – Mint_161, computer chess game, 2000.

3.e3 Bb4–/+ 4.Bb2 Bf8 5.Nf3 Nf6 6.Be2 Be7 7.0–0 0–0 8.Qc2 d5 9.Ng5 g6 10.Qc3 Nbd7 11.Nf3 Bd6 12.d3 Re8 13.Nbd2 e5 14.h3 e4 15.de4 de4 16.Nd4 c5 17.N4b3 Be5 18.Qc2 Bb2 19.Qb2 b6 20.Qc2 Bb7 21.Rfd1 Qc7 22.Nf1 Nf8 23.Ng3 Rad8 24.Nd2 Rd6 25.a3 Qb8 26.Rab1 h6 27.a4 a5 28.Rf1 N8h7 29.Rfe1 Ree6 30.Qb2 Ba8 31.Nb3 Nd7 32.Na5 Ne5 33.Qc2 Nd3–/+ 34.Bd3 ed3 35.Qd2 Qe8 36.Nb3 Qa4 37.Qc3 Qc6 38.f3 Ng5 39.Nd2 f5 40.h4 Nf7 41.Ra1 Qe8 42.Ngf1 Ne5 43.Ra7 Re7 44.Raa1 Nc6 45.Rab1 Nb4 46.Rb2 Qd8 47.Reb1 Ree6 48.Ra1 Rd7 49.Kf2? Qh4 50.Kg1 Qd8 51.Kf2 h5 52.Kg1 Kh7 53.Kf2 h4 54.Nh2?! g5 55.Rh1 Nc2 56.Nhf1 Kg6 57.Ra2 Rde7 58.g3 Rh7 59.g4 fg4 60.Rc2?? g3 61.Kg2 dc2 62.Qc2 Kh6 63.Ng3 Kg7 64.Nf5 Kg8 65.Ng3 Qc7 66.Nge4 Be4 67.Ne4 Re4! 68.Qe4 Qg3 69.Kf1 Rg7?? 70.Qe8= Kh7 71.Qe4 Kh6–/+ 72.Rg1 Qh3 73.Rg2? Qd7 74.Ke1?? Re7–+ 75.Rd2 Qd2!! 76.Kd2 Re4 77.fe4 h3 78.e5 Kg6 79.e6 Kf6 80.Kd3 h2 (80...h2 81.Kd2 Ke6–+) 0–1. Mauron,Regis – Mongey,Alain (1630), Montigny le Bretonneux op, 2007.

3.a3 a5

4.Bb2 Nf6 5.e4 Ne4 6.Qf3 d5 7.Nc3 (7.d3 Nf6 8.b5 cb5 9.cb5 Nbd7–/+) 7...Nc3 (7...ab4 8.Ne4 de4 9.Qe4 ba3 10.Nf3–+) 8.Bc3 (8.Qc3 dc4 9.Qc4 ab4 10.ab4 Ra1 11.Ba1 Na6–/+) 8...ab4 9.Bb2? (9.ab4 Ra1 10.Ba1 Na6–+ (10...Bb4?! 11.Qg3=+)) 9...Ra4?? (9...ba3 10.Ba3 dc4 11.Bb2 Ra1 12.Ba1–+) 10.Bd3? (10.Qd1 ba3 11.Qa4 ab2–/+) 10...Qa5 (10...dc4!? 11.Bc2 b3 12.Bb1–+) 11.Ne2? (11.Qg3 Nd7 12.cd5 ba3 13.de6–+) 11...ba3–+ 12.Bc3 Bb4?? (better is 12...Qd8–+) 13.0–0 (better is 13.Qg4!?=) 13...dc4 14.Bc2 Bc3 15.dc3 Nd7 16.Nf4 Ne5 17.Qe3 Ng4 18.Qf3 Qg5?? 19.Ba4+– 0–0 20.h3 e5 21.hg4 Bg4? 22.Qe4 ef4+/– 23.g3 f3?? 24.Rfe1 h5 25.Bc2 g6 26.Qc4 h4? 27.Bd1?? hg3–/+ 28.fg3 Qd2 29.Qf1 Qc3 30.Bf3? Bf3–+ 31.Kf2? Bd5 32.Rad1 Qg3 33.Kg3+– Kg7 (33...a2 34.Qf6 a1R 35.Ra1 Bf3 36.Rh1 Bh5 37.Rh5 gh5 38.Qg5 Kh7 39.Rh1 b6 40.Rh5) ½–½. Papa Lazarou II – coolerdude, ChessWorld.net, 2004.

4.b5 cb5 5.cb5 Nf6 6.Bb2 d5 7.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6 6.c4 cb5 7.cb5).

4.b5 cb5 5.cb5 Nf6 6.Bb2 Be7 7.e3 d6 8.Nf3 e5 9.d4 e4 10.Nfd2 d5 11.Nc3 0–0 12.Rc1 Bg4 13.Be2 Be2 14.Qe2 Ne8 (14...Bd6 15.0–0=) 15.0–0 f5 16.Nb3 (16.Qh5 g6 17.Qh6 Nf6+=) 16...Qd6 17.Nc5 b6 18.N3a4 Ra7 (18...bc5 19.dc5 Qc7 20.Nb6+=) 19.Rc2 (19.Nb3 Rc7=) 19...Bd8 (19...bc5 20.dc5 Qg6 21.Rb1=+) 20.Rfc1 (20.Nb3 Bc7 21.Qh5 Nf6=) 20...f4 (20...bc5 21.dc5 Qe6 22.Rb1=+) 21.ef4 (21.Nb3 f3 22.Qf1 fg2 23.Qg2 Rc7=+) 21...bc5–/+ 22.dc5 Qf4 23.Bd4 (23.Qe3 Qf5 24.Rb1 Bf6–/+) 23...Raf7 (23...Bf6 24.Be3 Qh4–/+) 24.b6 (better is 24.Qe3!? Qh4 25.Qg3 Qg3 26.hg3–/+ (26.fg3? Nc7–+)) 24...Nc6–+ 25.Be3 Qf5 26.Qb5 d4 27.Qc6 de3 28.f3 (28.Rf1 Bh4 (28...ef2?! 29.Rcf2 Qe5 30.Rf7 Rf7 31.Rf7 Kf7 32.Qb5–+) 29.g3 A) 29...ef2 30.Rcf2 Qe5 31.Rf7 (31.gh4 Rf2 32.Rf2 Qd4 33.Qe6 Kh8–+) 31...Rf7 A1) 32.gh4 Qd4 33.Kg2 Qd2 34.Kg3 Qd3 (34...Rf1?! 35.Qe8 Rf8 36.Qe4=+) 35.Kg4 Qe2 (35...Qf1?! 36.Qe8 Rf8 37.Qe6 Kh8 38.Qe4–/+) 36.Kg3 Rf3 (36...Qf1?! 37.Qe8 Rf8 38.Qe4=+) 37.Kg4 Qg2 38.Kh5 g6 39.Qg6 Qg6; A2) 32.Rf7 Kf7 33.gh4+/–; B) 29...Qf3–+) 28...ef3 29.Qf3 Qd7 30.c6 Qd4 31.Rc4 Qd2–/+ 32.Qf7?? Rf7–+ 33.h4 e2 34.c7 e1Q 35.Re1 Qe1 36.Kh2 Rf1 (37.Kh3 Rh1 38.Kg4 Nf6 39.Kf5 Rf1 40.Rf4 Qe4 41.Kg5 Qf4#) 0–1. juanpacio (1735) – metajedrez (2060), internet, 2006.

4.b5 d5 5.e3=.

3.a3 Nf6

4.Bb2 Be7 5.Nf3 0–0 6.e3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6).

4.Bb2 Be7 5.Nf3 d5=.

4.Bb2 Be7 5.g3 0–0 6.Bg2 a5 7.Nc3 (7.Qb3!?+=) 7...ab4–/+ 8.ab4 Ra1 9.Qa1 Bb4 10.Nh3 (10.Na4 Be7–/+) 10...d5–+ 11.cd5 ed5 12.0–0 Nbd7 13.d3 Qa5 14.Qa5 Ba5 15.Ra1 Bc7 16.e4 de4 17.Ne4 Ne4 18.de4 Ne5 19.Nf4 Rd8 20.Kf1 b5 21.Ra8 b4 22.Ke1 (better is 22.Bd4–+) 22...g5 23.Be5 Be5 24.Nd3 Bc3 (24...Rd3?! 25.Rc8 Kg7 26.Rc6–/+) 25.Ke2 (25.Kf1 b3 26.e5–+) 25...Bg4 26.f3 Ra8 27.fg4 Ra2 28.Kf3 b3 29.Bf1 (29.h3 b2 30.Nb2 Bb2–+) 29...c5! 30.Nc5 b2 31.Bd3 Bd4 32.Nb3 (32.e5 Bc5 33.Ke4–+) 32...b1Q! 33.Bb1 Rf2# 0–1. Dinu – Woelfelschneider,Peter, 2009.

4.d4 a5 5.b5 d5=.

3.Bb2

3.Bb2 (--> 1.b4 e6 TESTI100 2.Bb2 c6 3.c4).

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

3.Bb2 Qb6 4.a3 a5 (--> 1.b4 c6 2.Bb2 Qb6 3.a3 a5 4.c4 e6).

3.Bb2 d5 4.cd5 cd5 5.e3 Nf6 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 cb5 6.cb5).

3.Bb2 d5 4.e3 (--> 1.b4 c6 2.c4 d5 3.e3 e6 4.Bb2).

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

3.Bb2 d5 4.e3 Nd7 5.Nf3 Ngf6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

3.Bb2 d5 4.e3 Nf6 5.a3 Bd6 6.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

3.Bb2 d5 4.e3 Nf6 5.b5 cb5 6.cb5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 cb5 6.cb5).

3.Bb2 f5 4.e3 Nf6 5.a3 d5 6.Nf3 Bd6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 Bd6 6.c4 c6).

3.Bb2 Nf6 (--> 1.b4 c6 2.Bb2 Nf6 3.c4 e6).

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

3.Bb2 Nf6 4.a3 a5 5.b5 cb5 6.cb5 d5 7.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6 6.c4 cb5 7.cb5).

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

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

3.Bb2 Nf6 4.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.c4).

3.Bb2 Nf6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 cb5 8.cb5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 a6 4.c4 ab5 5.cb5 c6 6.a4 cb5 7.ab5 Ra1 8.Ba1).

3.Bb2 Nf6 4.b5 a6 5.a4 ab5 6.cb5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 a6 4.c4 ab5 5.cb5 c5 6.a4).

3.Bb2 Nf6 4.b5 cb5 5.cb5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 a6 4.c4 ab5 5.cb5 c5 6.a4 cb5 7.ab5 Ra1 8.Ba1).

3.Bb2 Nf6 4.b5 cb5 5.cb5 d5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 cb5 6.cb5).

3.b5 cb5

4.cb5= a6 5.Nc3 (5.ba6 Na6 6.e4 d5=) 5...ab5 6.Nb5 Nf6 7.e3 (7.Bb2 Nc6=) 7...Be7 8.Nf3 (8.Bb2 0–0=) 8...0–0 9.Be2 Nc6 10.0–0 b6 (10...e5 11.Bb2 d6 12.a3=) 11.Bb2 Ba6 12.a4 d5 13.Ne5 Ne5 14.Be5 Nd7 15.Bc7 Qc8 16.Bg3 Qb7 17.d4 Rfc8 18.Qd2 (18.Bd3 Nf6+=) 18...Nf6= 19.f3 Rc6 (19...Nh5 20.Bf2=) 20.Rfc1 Rac8 21.Rc6 Rc6 (21...Qc6? 22.Na7 Qb7 23.Nc8 Qc8 24.Rc1+–) 22.Rc1 Qc8 (22...Nh5 23.Rc6 Qc6 24.Be1=) 23.Rc6 Qc6 24.Be1 (24.Bd3 Nh5=) 24...Ne8 25.Qc3 Qc3 26.Bc3 Bd8 (26...f5 27.Bd3=) 27.Kf2 Bc8 (27...Bh4 28.g3 Be7 29.h3+=) 28.Bb4+/– g5 (28...Bd7 29.e4+/–) 29.Nd6 (29.Bd3 Bd7+/–) 29...Bd7+= 30.Ne8 Be8 31.Bb5 Bb5 32.ab5 Bc7 (32...f6 33.Bd6+=) 33.Be7 h6 34.Bf6 Kh7 (34...Kf8 35.e4+=) 35.e4+/– Kg6 36.e5 Kh7 (36...h5 37.Kg3+/–) 37.Kg3 (37.g4 Kg6+/–) 37...Kg6 38.f4 Kf5 39.fg5 hg5 40.Kf3 Kg6? (better is 40...Bb8+/–) 41.Kg4+– Kh6 (41...Bb8 42.h3+–) 42.Bg5 Kg6 43.h4 Kg7 (43...Kh7 44.Be7 Kg6 45.h5 Kh6 46.Bg5 Kg7 47.Bf6 Kh6 48.Kh4+–) 44.Kh5 (better is 44.Be7+–) 44...Bb8 (44...Kh7 45.Bf6 Kg8 46.Kh6+–) 45.Bd8 Ba7 46.g4 1–0. Kroekel,Bernd – Schuler,D, St Ingbert op, 1987.

4.cb5 d5 5.Bb2 Nf6 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 cb5 6.cb5).

4.cb5= d5 5.Nf3=.

4.cb5 Nf6 5.a4 Bb4 6.Ba3 Qe7 (6...Ba3 7.Ra3 d6 8.d4=) 7.Bb4= Qb4 8.Nc3 0–0 9.Qb1 Qa5 10.Nf3 a6 11.e3 ab5 12.Bb5 d5 13.Nd4 (13.0–0 Nc6=) 13...Bd7 (13...e5 14.Nb3 Qb4 15.a5=) 14.Nb3 Qd8 (14...Qb4 15.Nd4 Qd6 16.Be2=) 15.0–0 Bb5 16.ab5 Ra1 17.Qa1 Nbd7 18.Na4 (18.Qa7 Qc7=) 18...Ne4 19.f3 Nef6 (19...Nd6 20.Qd4=) 20.Nbc5 (20.d4 Qe7 21.Nac5 b6 22.Nd7 Qd7=) 20...Nc5=+ 21.Nc5 Qc7 (21...Qb6 22.d4=) 22.Rc1 Qb6 23.Qb1 Re8 24.d4 Qa5 (24...e5 25.de5 Re5 26.Rc3=) 25.Nb7 Qa7? (better 25...Qd2 26.Re1 Rb8=) 26.Nd6+– Rf8 27.b6 (27.Qb4 Nd7+–) 27...Qa6? (27...Qa3 28.Nc8 Qe3 29.Kh1 Nd7+= (29...Qd4?? 30.b7+–)) 28.Qb5?? (28.Rc7 Qa5+–) 28...Qb5?? (better 28...Qa3 29.Qc6 Qe3 30.Kh1 Nh5+=) 29.Nb5+– Nd7 30.b7 Nb8 31.Nd6 h6 32.Rc8 Nd7 33.Ne8 f6 (33...h5 34.e4 de4 35.fe4+–) 34.b8Q (better 34.Nc7 Kf7+–) 34...Nb8 35.Rb8 Kf7 36.Nd6 Kg8 37.Rf8 (37.Rb7 Rd8 38.Nb5 h5+–) 37...Kf8 38.g4 Ke7 39.Nb5 Kf7 (39...Kd7 40.e4+–) 40.h4 f5 (40...g6+–) 41.gf5 ef5 42.Nd6 (better 42.Nc7 Kg6+–) 42...Ke6 43.Ne8 Kf7 (43...g6+–) 44.Nd6 (better 44.Nc7 f4+–) 44...Ke6 45.Nb5 g6?? (45...Kf7 46.Nc7 Kg6 47.Nd5 Kf7+–) 46.Nc3 Kd6 47.e4 fe4 48.fe4 de4 49.Ne4 (better 49.Kf2!? Ke6+–) 49...Kd5 50.Nf2 Kd4 51.Kg2 Ke5 (51...h5 52.Kg3 Ke5 53.Kf3+–) 52.Kg3 (better 52.Ng4 Kf4 53.Nh6+–) 52...g5 (52...Kf5 53.Ng4 h5 54.Ne3 Ke4+–) 53.hg5 (better 53.Ng4 Ke4 54.h5+–) 53...hg5= 54.Kg4 Kf6 55.Nh3 Kg6 56.Ng5 ½–½. afsharian – F_J, lichess.org, 2018.

2.c4 Nf6

(--> 1.b4 Nf6 2.c4 c6).

3.Bb2

3.Bb2 (--> 1.b4 c6 2.Bb2 Nf6 3.c4).

3.Bb2 Qb6 4.a3 a5 5.c5 Qc7 6.e3 ab4 7.ab4 Ra1 8.Ba1 (--> 1.b4 c6 2.Bb2 Qb6 3.a3 a5 4.c4 ab4 5.c5 Qc7 6.ab4 Ra1 7.Ba1 Nf6 8.e3).

3.Bb2 Qb6 4.a3 a5 5.e3 ab4 6.c5 Qc7 7.ab4 Ra1 8.Ba1 (--> 1.b4 c6 2.Bb2 Qb6 3.a3 a5 4.c4 ab4 5.c5 Qc7 6.ab4 Ra1 7.Ba1 Nf6 8.e3).

3.Bb2 d6 4.e3 e5 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 c6).

3.Bb2 e5 4.Be5 Bb4 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 c6).

3.Bb2 a5

4.b5 (--> 1.b4 a5 2.b5 Nf6 3.c4 c6 4.Bb2).

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

3.Bb2 d5

4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4).

4.e3 Nbd7 5.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.c4).

4.e3 Nbd7 5.Nf3 e6 6.a3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.e3 e5 5.a3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6 5.c4 c6).

4.e3 e6 5.a3 Be7 6.Nf3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 Be7 6.c4).

4.e3 e6 5.b5 Bd6 6.Nf3 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0–0 6.c4 c6).

4.e3 Bf5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 c6).

4.e3 Bf5 5.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.c4).

4.e3 Bf5 5.Nf3 dc4 6.Bc4 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 c6).

4.e3 Bf5 5.Nf3 e6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6).

4.e3 Bf5 5.Nf3 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

4.e3 g6 5.Nf3 Bg7 6.d4 Nbd7 7.Nbd2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nbd2 Nbd7).

3.Bb2 e6

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

4.a3 a5 5.b5 cb5 6.cb5 d5 7.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6 6.c4 cb5 7.cb5).

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

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

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

4.a3 d5 5.e3 Nbd7 6.Nf3 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

4.a3 d5 5.e3 Nbd7 6.Nf3 Be7 7.Nc3 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6 7.Nc3 Nbd7).

4.a3 Be7 5.e3 d5 6.Nf3 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6).

4.a3 Be7 5.Nf3 0–0 6.e3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6).

4.a3 Be7 5.Nf3 d5 6.e3 Nbd7 7.Nc3 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6 7.Nc3 Nbd7).

4.b5 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 c6 4.c4).

4.b5 cb5 5.cb5 d5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c6 5.c4 cb5 6.cb5).

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

4.b5 d5 5.e3 Bd6 6.Nf3 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0–0 6.c4 c5).

4.b5 d5 5.e3 Be7 6.a4 0–0 7.Nf3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0–0 7.c4).

4.b5 d5 5.e3 Be7 6.Nf3 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0–0 6.c4 c6).

3.Bb2 g6

4.e3 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 c6).

4.e3 Bg7 5.Nf3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6).

4.e3 Bg7 5.Nf3 0–0 6.d4 d6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d6 6.d4 c6).

4.e3 Bg7 5.Nf3 d6 6.d4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d6 6.d4 c6).

4.e3 Bg7 5.Nf3 d6 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d6).

4.Nf3 Bg7 5.e3 d5 6.Nc3 0–0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nc3).

4.Nf3 Bg7 5.e3 d5 6.Be2 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.Be2 d5).

3.e3 g6

4.Bb2 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.c4 Bg7 4.e3 c6).

4.Bb2 Bg7 5.Nf3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6).

4.Bb2 Bg7 5.Nf3 d6 6.d4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d6 6.d4 c6).

3.Nf3 d5

4.e3 Bg4 5.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.c4).

4.e3 g6 5.Bb2 Bg7 6.d4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5).

2.d4 a5

3.ba5 d5 A) 4.Nf3 Qa5 (4...Nf6 5.e3 Bf5 6.Bd2 Ne4= 0.09; 4...Bf5 5.Bd2 Nf6 6.c4 e6= 0.19; 4...Bg4 5.Bd2 Bf3 6.ef3 e6= 0.09; 4...e6 5.Bd2 Nf6 6.c4 Ne4= 0.09) 5.Bd2 Qc7 6.e3 Nf6= 0.09; B) 4.e3 Qa5 (4...Nf6 5.Bd2 Ne4 6.Nf3 Bg4= 0.12; 4...Bf5 5.Bd2 Nf6 6.c4 e6= 0.12) 5.Bd2 Qc7 6.c4 Nf6= 0.09; C) 4.Bd2 Bg4 (4...Bf5 5.e3 Nf6 6.c4 e6= 0.12; 4...Nf6 5.e3 Ne4 6.Nf3 Bg4= 0.12; 4...e6 5.e3 Nf6 6.Nf3 Ne4= 0.12) 5.h3 Bf5 6.e3 Nf6= 0.09.

3.ba5 e6 A) 4.e4 d5 5.e5 c5 6.dc5 Qa5= –0.06; B) 4.Nf3 Nf6 (4...d5 5.Bd2 Nf6 6.e3 Ne4= 0.12) 5.Bd2 Ne4 6.e3 Nd2= 0.03; C) 4.e3 d5 (4...Nf6 5.Bd2 d5 6.Nf3 Ne4= 0.12; 4...Bb4 5.Bd2 Ba5 6.Nf3 d6= 0.22; 4...Qa5 5.Bd2 Qd8 6.Nf3 d5= 0.09; 4...d6 5.Nf3 Qa5 6.Bd2 Qh5= 0.25) 5.Bd2 Nf6 6.c4 Ne4= 0.09; D) 4.c4 Nf6 (4...d5 5.e3 dc4 6.Bd2 Bd6= 0.12; 4...Be7 5.e3 d5 6.Nf3 dc4+= 0.28; 4...Bb4 5.Bd2 Ba5 6.Nf3 Nf6= 0.19; 4...c5 5.Nf3 cd4 6.Nd4 Nc6= 0.19) 5.Nf3 Ne4 6.e3 Bb4= 0.03; E) 4.Bd2 Nf6 (4...d5 5.e3 Nf6 6.Nf3 Ne4= 0.12) 5.e3 d5 6.c4 Ne4= 0.09.

3.ba5 Nf6= A) 4.e3 d6 (4...Ne4 5.Bd3 d5 6.Nf3 Qa5= 0.12; 4...e6 5.Bd2 d5 6.c4 Ne4= 0.09; 4...d5 5.Bd2 Ne4 6.Nf3 Bg4= 0.12; 4...Qa5 5.Bd2 Qc7 6.Nf3 d6= –0.03) 5.Bd2 e5 6.c4 Be7= –0.06; B) 4.Nf3 Qa5 (4...Ne4 5.e3 Qa5 6.Bd2 Nd2= 0.03; 4...e6 5.Bd2 Ne4 6.e3 Nd2= 0.03; 4...d5 5.Bd2 Ne4 6.e3 Bg4= 0.12; 4...d6 5.Bd2 Ne4 6.e3 Bf5= 0.19) 5.Bd2 Qc7 6.e3 d6= –0.03; C) 4.c4 e5 5.de5 Qa5 6.Bd2 Qe5= –0.25; B4) 4.Bd2 d5 (4...Ne4 5.e3 d5 6.Nf3 Bg4= 0.12; 4...e6 5.e3 d5 6.Nf3 Ne4= 0.12) 5.Nf3 Ne4 6.e3 Bg4= 0.12.

3.b5 (--> 1.b4 a5 2.b5 c6 3.d4).

3.ba5 Qa5

4.Bd2 Qa7 5.e3 Nf6 6.Nf3 d6=.

4.Bd2 Qb6 5.e3 Nf6 6.Bd3 d5=.

4.Bd2 Qc7 5.c4 Nf6 6.Nf3 e6 7.e3 d5 8.c5 Nbd7 9.Bc3 Ne4 10.Be2 b6 11.cb6 Nb6 12.0–0 Na4 13.Qc2 Bd6 14.Bd3 f5 15.Rc1 0–0 16.Be1 c5 17.Bb5 Qa7 18.Ba4 Qa4 19.Qa4 Ra4 20.dc5 Bc5 21.Nc3 Nc3 22.Bc3 Ba3 23.Rd1 Rc4 24.Rd3 Ra4 25.Be5 h6 26.Rc3 Ba6 27.Rc7 Rf7 28.Rc6 Re7 29.Rb1 Bc4 30.Nd4 Ba2 31.Rbb6 Bc4 32.Nf5 ef5 33.Rb8 Kh7 34.Bc3 d4 35.Bd4 Bd5 36.Rcc8 Rd4 37.Rb1 Rb7 38.Ra1 Rdb4 39.f3 Rb1 40.Rb1 Rb1 41.Kf2 Rb2 42.Kg1 Re2 43.Rc3 Bb4 44.Rd3 Rd2 45.Rd2 Bd2 46.Kf2 Bc4 47.e4 fe4 48.fe4 Bd3 49.e5 Kg6 50.g4 Kf7 51.e6 Ke6 52.h4 Ke5 53.Kf3 Kd4 54.Kf2 Ke4 55.g5 hg5 56.hg5 Kf5 57.g6 Kg6 58.Kg2 Kf5 59.Kf3 g5 60.Kg3 g4 61.Kg2 Kf4 62.Kf2 Be3 0–1. Confente – Hansen, corr 3GMM–15 1994–97.

4.Bd2 Qd8 5.Nf3 d5 6.e3 Nf6=.

4.Bd2 Qh5 5.Nf3 d5 6.e3 Bg4=.

3.Bd2 ab4

4.Bb4 Na6 5.Bd2 d5 6.e3 Bf5=.

4.Bb4 d5 5.e3 Na6 6.Bd2 Bf5=.

4.Bb4 Nf6 5.c4 Na6 6.Bd2 d6=.

4.Bb4 g6 5.e3 Bg7 6.Nf3 Nf6 7.c4 d6 8.Nbd2 0–0 9.c5 dc5 10.Bc5 b6 11.Bb4 Nd5 12.Qb3 c5 13.Ba3 Nc6 14.Bb2 Na5 15.Qc2 Nb4 16.Qc1 Bf5 17.e4 Bg4 18.a3 Nbc6 19.d5 Nd4 20.Nd4 cd4 21.f3 Bd7 22.Bd3 e6 23.de6 Be6 24.0–0 f5 25.f4 fe4 26.Be4 Rc8 27.Qd1 Qd7 28.Qe2 d3 29.Bd3 Bb2 30.Rae1 Rce8 31.Ne4 Ba3 32.Ng5 Bc5 33.Kh1 Bd5 34.Qd2 Re1 35.Re1 Qd6 36.Bb5 Bb4 37.Qd1 Be1 38.Qe1 Qf4 39.Nh3 Qe4 40.Qe4 Be4 41.Kg1 Bd5 42.Bd3 Bc4 43.Bb1 Bf1 0–1. Jaszczuk – Caruso, 1994.

3.Bd2 Qb6+=

4.ba5 Qd4 5.c3 (5.Nc3 d5+= 6.Nf3 Qg4= –0.22) 5...Qc5 (5...Qg4 6.Nf3 d5–/+ –0.72) 6.Nf3 (6.e3 Nf6–/+ –0.78) 6...Qa5 (6...Nf6 7.e3–/+; 6...d5–/+ –0.88) 7.c4 (7.e4 d6+=) 7...Qa4 (7...Qf5 8.Nc3–/+) 8.Qa4+= Ra4 9.e4 (9.Nc3 Ra3+=) 9...d6 10.Nc3 Ra3 11.Nb1 (11.Nd4 e5 12.Nc2 Ra8–/+) 11...Ra8–/+ 12.Bd3 (12.Nc3 Nf6–/+) 12...Nd7 13.Nc3 Ngf6 14.0–0 (14.Be3 Ng4 15.Bd2 Nc5–+) 14...Nc5 15.Bc2 Be6 16.e5 de5 (16...Nfd7 17.Rfe1–/+) 17.Ne5 g6 (17...Ng4 18.Ng4 Bg4 19.h3–/+) 18.Be3 Nfd7 19.Nd7 Nd7 20.Bb3 (20.Bd4 Rg8 21.Bb3 Bg7 22.Bg7 Rg7–/+) 20...Bg7 21.Rac1 0–0 (21...h6 22.Rfd1–/+) 22.Ne4 Rfd8 23.f4 h6 24.h3 Bb2 25.Rc2 Ba3 26.Rc3 f5 27.Nf2–/+ Bc5 28.Bc5 Nc5 29.Bc2? Ra2–+ 30.g4 Rd2 31.gf5 gf5 32.Rg3 Kf7 33.Nd1 Rac2 34.Ne3 Ne4 35.Nc2 Ng3 36.Rf2 Rf2 37.Kf2 Ne4 (37...Ne4 38.Ke3 Bc4–+) 0–1. Aannevik,Bjarne – Baeckstroem,Mikael (2295), corr ICCF WSTT/3/06/1, 2006.

4.c3 ab4 5.Qb3 d5+= (5...e6 6.e3 Nf6+=) 6.Nf3 Nf6 +=.

4.c3 d5 5.Qa4 Bf5 6.Bf4 Nf6 +=.

4.c3 Nf6 5.e3 d5 6.a3 ab4 +=.

4.Nf3 ab4 5.c4 =+.

4.Nf3 ab4 5.e4 d5 6.ed5 cd5 +=.

2.e4 a5

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

3.b5 cb5 (--> 1.b4 a5 2.b5 c6 3.e4 cb5).

3.c3 a4 4.Na3 e5 5.Nf3 h6 6.Bd3 g5 7.0–0 g4 8.Ne5 d6 9.Ng4 h5 10.Ne3 h4 11.Re1 h3 12.Nec4 Nd7 13.Bf1 Ne5 14.Qe2 b5 15.Na5 Bh6 16.d4 hg2 17.Bg2 Nf6 18.de5 de5 19.Nc6 Qd6 20.Ne5 Qe5 21.f4 Qc3 22.Bb2 Qb4 23.e5 Nd7 24.e6 Qc5 25.Kh1 Nb6 26.ef7 Kf7 27.Bh8 Bf4 28.Qf3 Qb4 29.Qf4 Qf4 30.Rad1 Qh6 31.Ba1 Bh3 32.Rd2 Bg2 33.Rg2 Re8 34.Rf1 Ke7 35.Nb5 Qc6 36.Nd4 Qd5 37.Nf5 Kd7 38.Bf6 Re2 39.Nh4 Ra2 40.Nf3 Ra3 41.Rg7 Ke6 42.Bb2 Rf3 43.Rg6 Kf7 44.Rfg1 Rf6 45.R6g2 Rf2 46.Bc3 Rg2 47.Rg2 Qd1 48.Rg1 Qf3 49.Rg2 Qc3 50.Rg3 Qc6 51.Kg1 Nd5 52.h3 Nf4 53.Kh2 Ne2 54.Rg2 Nf4 55.Rf2 Qd6 56.h4 Kg6 57.Kh1 a3 58.Rh2 Qd5 59.Rg2 Qg2 0–1. Miker – willi_weizenkeim, playchess.de, 2001.

3.d4 ab4 4.Bc4 e6 5.Nf3 d5 6.Bd3 de4–+ 7.Be4 Nf6 8.Nbd2 Nbd7 9.Ne5 Ne5–+ 10.de5 Nd5 11.Bb2–/+ Be7 12.0–0 b6 13.Re1 Bb7 14.Qg4 g6 15.Rad1? Qc7 16.f4 Ra2 17.Nc4 0–0 18.f5?? ef5–+ 19.Bf5 Bc8 20.e6 Be6 21.Ne5?? Bf5–+ 22.Qf3 Rb2 23.Rd2 b3! 24.Ree2 Bc5 25.Kf1 Rb1 26.Re1 Re1 27.Ke1 Qe5 28.Re2 Qa1 29.Kd2 bc2 30.Re1 Bb4 31.Ke2 Qe1 0–1. Papa Lazarou II – Bury born and bred, ChessWorld.net, 2004.

3.ba5 Qa5

4.Bb2 e5 5.Nf3 d6 6.Be2 Nf6 7.Bc3 Qc7 8.d3 Be6 9.a4 Nbd7 10.Ng5 Nc5 11.Bb4 d5 12.0–0 Be7 13.Bc5 Bc5 14.Ne6 fe6 15.Bg4 Qf7 16.Nd2 0–0 17.Nb3 Bb4 18.Bh3 Kh8 19.f4 ef4 20.Rf4 Qc7 21.Qf3 Bd6 22.Nd4 Qb6 0–1. Trkn – Michael I., itsyourturn.com, 2000.

4.Nc3 Nf6 5.Nf3 d5 6.e5 Ne4 7.Ne2 Bg4 8.Nfd4 Be2 9.Qe2 e6 10.Nb3 Qb6 11.f3 Nc5 12.Bb2 Nb3 13.cb3 Bc5 14.f4 Na6 15.Bc3 d4 16.Bb2 Nb4 17.Qe4 Ra2 18.Ra2 Na2 19.Bc4 Nb4 20.f5 ef5 21.Qf5 0–0 22.0–0 Nd5 23.e6 fe6?? 24.Qe6+– Kh8 25.Rf8 Bf8 26.Qf7 Qc5 27.Bd5 cd5 28.d3 b5 29.Kf1 Qe7 30.Qd5 Qf6 31.Ke2 Qe7 32.Qe4 Qe4 33.de4+/– Bd6 34.h3 Be5 35.Kd3 Kg8 36.g4 Kf7 37.Bd4 Bf4 38.Kc3 Bd6 39.h4 g6 40.e5 Be7 41.g5 Ke6= 42.Kd3 Kf5 43.Bc3 Bc5 44.Be1 Ke5 45.b4 Be7 46.Bg3 Kf5 47.Be1 Ke5 48.Bg3 Kf5 49.Be1 Ke5 50.Bg3 Kf5 51.Be1 Ke5 52.Bg3 Kf5 53.Be1 Ke5 54.Bg3 Kf5 55.Be1 Ke5 56.Bg3 Kf5 57.Be1= Ke5 58.Bg3 Kf5 59.Be1 Ke5 60.Bg3= ½–½. Hossa (2110) – shefa (2130), ICS rated standard match, 1998.

2.e4 Qb6

3.a3 Qd4 4.Nc3 e5 5.Nf3 Qd6 6.Bc4 Ne7? (better is 6...b5 7.Bb3 a5 8.ba5 Ra5+=) 7.Ng5+– Qc7? (better is 7...Qf6 8.Nf7 d5 9.Nh8 dc4 10.Qh5 g6 11.Qh7 Bg7 12.Ng6 Ng6 13.Qg8 Bf8 14.Qc4 Nh4+–) 8.Bf7 Kd8 9.0–0 (9.Bc4 Ke8 10.Nf7 Rg8+–) 9...h6 10.Qh5 d6 11.Be6 (11.Bc4 g6 12.Qh4 Ke8 13.Bf7 Kd8 14.Bg6 Ng6 15.Ne6 Kd7 16.Nc7 Nh4 17.Na8 b6+–) 11...g6 12.Nf7 Ke8 13.Qh3 Rh7 14.Nd6! Qd6 15.Bc8 Qc7 16.Bg4 h5 17.Be2 Nd7 18.d3 Qd6 19.Be3 Rf7 20.Rad1 Bg7 21.Bg5 a5 22.b5 Qa3 23.bc6 bc6 24.Nb1 Qd6 25.Qg3 Kf8 26.Be7 Qe7 27.Qg6+– h4 28.Qc6 Qe8 29.Bh5 Rc8 30.Bf7 Rc6 31.Be8 Ke8 32.c3 Ke7 33.c4 Nc5 34.Nc3 Nb3 35.Nd5 Ke6 36.f4 Nd4 37.f5 Kf7 38.Rb1 a4 39.Rb7 Kf8 40.f6 Bh6 41.f7 Rc8 42.Ne7 (42...Kg7 43.Nc8+–) 1–0. narendras – thotares, internet, 2007.

3.a3 e5 4.Bb2 d6 5.d4 Nd7 6.Nf3 Ngf6 7.Bd3 (7.Nbd2 ed4 8.Nd4 Ne5+=) 7...Be7 (7...c5 8.de5 de5 9.Ne5 Ne5 10.Be5 cb4 11.0–0+=) 8.c4 (8.de5!? de5 9.Nbd2+= (9.Be5? Ne5 10.Ne5 Qd4 11.Nf7 Ne4–+)) 8...c5= 9.b5? (better 9.de5!? de5 10.b5=) 9...cd4–/+ 10.a4 Nc5 11.a5 Qd8 12.0–0 (12.Qc2 Nh5–/+) 12...Nd3 (better 12...Nfe4!? 13.Be4 Ne4–+) 13.Qd3–/+ 0–0 14.Nbd2 Bd7 (14...Nh5 15.Bc1–/+) 15.Ne1 (15.a6 b6=+) 15...b6 16.ab6 ab6 17.Ra8 Qa8 18.f4 Bc8 (18...Ng4 19.Nef3 f5 20.fe5 de5 21.Ra1–/+) 19.Nef3=+ Bb7 e4 seems the pivot of the position (19...Nd7!?=+) 20.fe5= Be4 (20...de5 21.Ne5 Rd8 22.Ra1= (22.Bd4?? Rd4 23.Qd4 Bc5 24.Qc5 bc5–+)) 21.Qd4 (21.Ne4 Ne4 22.Bd4 Qb7+=) 21...Bf3 (21...de5 22.Qb6 Qc8 23.Kh1=) 22.Nf3 (22.ef6 Bf6 23.Qb6 Bb2 A) 24.Rf3?? Qa1 25.Rf1 Bd4 26.Kh1 Qf1 (26...Bb6 27.Ra1 f5 28.g3+=) 27.Nf1 Bb6–+; B) 24.gf3 d5=+; C) 24.Nf3=) 22...de5= 23.Ne5?? (better 23.Qe5 Re8 24.Qc7 Bc5 25.Bd4=) 23...Bc5–+ 24.Qc5 bc5 25.Nc6 Nd7 (better 25...Qa2!? 26.Bf6 gf6 27.b6–+) 26.Ne7 Kh8 27.Nf5 f6 28.Rd1 (28.Nd6 Nb6 29.Bc1 Qa1–+) 28...Nb6 29.Ne3 (29.Nd6 Qa2 30.Bc1 Nc4 31.Nc4 Qc4–+) 29...Re8 30.Bc1 Qe4 31.h3 Nc4 32.Nc4 Qc4 33.b6 (33.Kh2 Qb5 34.Bf4 c4–+) 33...Qe6 (33...Qc2 34.Bd2 Qd1 35.Kf2 Qd2 36.Kg3 Qg5 37.Kf3 Qe3 38.Kg4 Re4 39.Kf5 Qf4) 34.b7 Qe7 35.Ba3 (35.Bd2 Qb7 36.Bc3 Qb3–+) 35...Qe3 36.Kh1 Qa3 37.Rb1 Rb8 38.Rd1 Qb4 (38...c4 39.Re1 c3 40.Re2–+) 39.Rd7 h6 40.Rc7 Rb7 (40...Rb7 41.Rb7 Qb7–+) 0–1. retiponziani (1765) – valpa, ChessWorld.net, 2009.

3.a3 Nf6 4.e5 (4.Nc3!?=) 4...Qd4=+ 5.Bb2?? (better is 5.Nc3 Qe5 6.Be2–/+) 5...Qb2–+ 6.Nc3 Nd5 7.Nge2 Nb4 8.Nd4? (better is 8.ab4 Qb4 9.Ra4–+) 8...Nd5 9.Nd5 cd5 (9...Qd4?! 10.Nc7 Kd8 11.Na8–/+) 10.c3 Qb6 (11.Rb1 Qg6–+) 0–1. Wobick – Hoffmann, corr SOK–89–51, 1989.

3.Nc3 Qb4 4.Nf3=.

3.Nc3 e5 4.Rb1 (4.a3 d6=) 4...Nf6= (4...Bb4? 5.a3+–) 5.Bc4 (5.Nf3 d5=) 5...Be7 (5...Qd4!? 6.Qe2 b5=+) 6.Nf3= 0–0 7.0–0 d5 (7...d6 8.d4+=) 8.ed5 e4 9.Na4?? (better is 9.Re1+=) 9...Qc7–+ 10.Nd4 b5 (10...Nd5?! 11.Qe2=) 11.Bb5 cb5 12.Nb5 Qd7 13.c4 Nd5 14.cd5 (14.Nc5 Qc6 15.d4 Na6–+) 14...Qb5–+ 15.Nc3 Qc4 (15...Qd3 16.Re1 f5 17.Rb3–+) 16.Re1 Bf5 17.Qe2 Rc8 18.Qc4 Rc4 19.f3 Rb4 20.d6? Bd6–+ 21.fe4 Rb1 22.ef5 Rc1 23.Rc1 Nd7 24.Nb5 Bc5 25.Kf1 a6 26.Nc7 Ra7 27.Nd5 f6 28.Rc4 Bd6 29.h3 Ne5 30.Rc8 Kf7 31.d4 Nd3 32.Rc6 Bg3 33.Rc3 Nf4 34.Nf4 Bf4 35.Kf2 Rc7 36.Ra3 Rc6 37.Kf3 Bd2 38.Ke4 Rd6 39.Rb3 Ke7 40.Rg3 Kf8 41.Rb3 Ba5 42.Rb8 Bd8 43.Rb3 Kf7 44.Rb7–/+ Be7 45.a4 Ke8 46.Rb8 Bd8–+ 47.Rb7 Rd7 48.Rb3 Ke7 49.g4 Kd6 50.h4 Kc6 51.Rb8 Bb6 52.d5? Kc7 53.Rg8 h6 54.Re8 Bc5 55.Re6 Re7 56.d6? Bd6 57.Kd5 Re6 58.Ke6 Bg3 (59.h5 Kb6–+) 0–1. Bray,Jose – Costa,Paulo C, POR–sf Portugal, 1993.

3.Bc4 Qb4?! 4.Qe2 =+.

3.Bc4 Qd4 4.Qf3 (4.Bf7 Kf7 5.Qh5 g6 6.Qf3 Kg7–+) 4...Qc4 (4...Qa1?! 5.Qf7 Kd8 6.Qf8 Kc7 7.Ne2=) 5.Bb2 (5.c3 d5 6.d3 de4 7.dc4 ef3 8.Nf3 Bf5–+) 5...Qc2 6.Qc3 (6.Ba3 d5 7.ed5 Nf6–+) 6...Qe4 7.Ne2 (7.Kf1 Nf6–+) 7...Qg2 8.Rg1 Qh2 9.Rg7 Nf6 10.Rg1 d5 11.Na3 (11.d3 e5 12.Qe5 Qe5 13.Be5 Bb4 14.Bc3 Be7–+) 11...Rg8 12.Rg8 Ng8 13.b5 (13.Ng3–+) 13...Qh1 14.Ng1 Qg1 15.Ke2 Bg4 16.Ke3 Qg2 17.bc6 (17.Qe5 Qf3 18.Kd4 Nd7 19.d3 Ne5 20.Rd1 Nd3 21.Kc3 Bg7 22.Kb3 Nb2 23.Rd3 Qd3 24.Kb4 Qc3) 17…Qe4 0–1. cole baker – pierre, ChessHere.com, 2005.

3.d4 Qb4 4.c3 Qb6 (4...Qa5!?=+) 5.Nf3= d5 6.Bd3 Bg4 (6...de4 7.Be4 Nf6 8.Bd3=) 7.h3 (7.Nbd2 Nf6 8.Rb1 Qc7+–) 7...Bf3 (7...de4 8.Be4 Nf6 9.Bd3 Bf3 10.Qf3=) 8.Qf3+= de4 9.Qe4 (9.Be4 Nf6 10.Nd2 Ne4 11.Ne4 Qb5+=) 9...Nf6= 10.Qe5 (10.Qf3 Qa5=) 10...Nbd7 11.Qg3 (11.Qe2 Qa5=+) 11...h5 (11...c5 12.Na3 cd4 13.cd4 Qb4 14.Ke2 Qd4 15.Be3 Qb2 16.Nc2=+) 12.h4 (12.Nd2 h4 13.Qf3 Qa5=) 12...Ng4 (12...c5!? 13.Nd2 cd4 14.cd4 Qd4–/+) 13.f3 Ngf6 14.Na3 Qa5 15.0–0?? (better 15.Bb2=) 15...Qc3–+ 16.Qc7 (16.Rb1 Qd4 17.Qf2 Qd3 18.Rb7 e5–+) 16...Qa1 (better 16...Qd4 17.Kh1 Qh4 18.Qh2 Qd4–+) 17.Bg5 (17.Be3 Qb2 18.Nc4 Nd5–+) 17...Qa2 (better 17...Qd4 18.Rf2 Qd3 19.Nc2–+) 18.Bf5 (18.Qb7 Rb8 19.Qa7–+) 18...e6 19.Bd3 (19.Nc2 ef5 20.Qb7 Rb8 21.Qc6 Be7–+) 19...Ba3 (better 19...Qa3 20.Qb7 Rb8 21.Qa6–+) 20.f4 Qd2 (better 20...Qb3 21.Bf6 Nf6 22.Bg6 Qe3 23.Kh1 fg6 24.Qa5–+) 21.Qb7 Rb8 22.Qa7 Qd3 (22...Rb2 23.Qa8 Nb8 24.Qb8 Rb8 25.Bf6 gf6 26.Bc2 Qc2 27.Rd1 Qd1 28.Kh2 Rb1 29.d5 Rg8 30.g4 Qg4 31.de6 Qh4) 23.Qa4 Bb2 (23...Ng4 24.f5 Rb1 25.Qa8 Nb8 26.Qb8 Rb8 27.fe6 Rb1 28.ef7 Kf8 29.Bc1 Bc1 30.Re1 Be3 31.Kh1 Re1) 24.Rd1 Qe3 25.Kh1 Ng4 26.Rg1 (26.Qc6 Qg3 27.Qd7 Kd7 28.Kg1 Ne3 29.Rd2 Ra8 30.Rb2 Ra1 31.Rb1 Rb1) 26...Bd4 (26...Qg3 27.Qc6 Qh2) 27.Qd1 (27.Qd4 Qd4 28.Rc1 Qe4 29.Be7 Qf4 30.g3 Qg3 31.Rc2 Rb1 32.Rc1 Rc1) 27...Nf2 (27...Rb2 28.Rf1 Qh3 29.gh3 Rh2) 28.Kh2 Nd1 29.Rd1 c5 30.f5 (30.Rf1 Qe2 31.Ra1 Ba1 32.Bd8 Rb2 33.Bf6 Qg2) 30...Qe5 (30...Be5 31.Kh1 Qg3 32.Bf4 Bf4 33.Kg1 Rb2 34.Rd7 Qg2) 31.Kh1 Qe2 32.Rg1 (32.Rd4 cd4 33.Kg1 Rb1 34.Kh2 Qe5 35.Bf4 Qf4 36.g3 Qf3 37.fe6 Rh1) 32...Bg1 33.Kg1 (33.fe6 Rb1 34.Bc1 Rc1 35.ed7 Kd7 36.g3 Qe4) 33...Rb1 (33...Rb2 34.Bd2 Qd2 35.fe6 Qg2) 34.Kh2 Rb2 35.Bf4 (35.Bd2 Qd2 36.Kg3 ef5 37.Kf3 Qf2) 35…Qg2 0–1. rdlynn – venaverme, gameknot.com, 2019. (=1.e4 c6 2.b4 Qb6)

3.Nf3 Qb4 4.Ba3? (better is 4.Nc3!?=) 4...Qe4–/+ 5.Be2 d5 6.h3 (6.0–0 Nf6–/+) 6...Qg6 7.g4 (7.Bd3 Qf6 (7...Qg2 8.Rh2 Bh3 9.Rg2 Bg2 10.Nh4+/–) 8.Nc3 e5 9.Bf8 Kf8–+) 7...Nf6 (7...h5 8.g5–+) 8.Bd3 (8.Nc3 Ne4–+) 8...Ne4 9.Qe2 (9.Bb2 Nd7–+) 9...Qf6 10.c3 h5 11.gh5 (11.Rg1 hg4 12.hg4 Rh3 13.Be4 de4–+) 11...Rh5 12.h4?? (12.Be4 de4 13.Qe4–+) 12...Bg4 13.Be4 (13.Qe3 Bf3 14.Rh3 Bg4–+) 13...de4 14.Qe4 (14.Rg1 Bf3 15.Qc4–+) 14...Bf3 15.Qb4 (15.Qe3 Re5 16.Rh3 Re3 17.de3–+) 15...Qe6 16.Kf1 Qe2 17.Kg1 Qe1 18.Kh2 Qf2 19.Kh3 Qg2 0–1. crca108 – mrkt, myChess.de, 2005.

3.a3 a5

4.ba5 Ra5 5.d4 d6 (5...d5!?=) 6.Nf3+= g6 7.Nbd2 Ra8 8.Be2 Bg7 9.Rb1 Qc7 10.0–0 Nd7 11.Bd3 Ngf6 12.Re1 0–0 13.c3 e5 14.a4 Re8 15.Qb3 h6 16.Nc4 ed4 17.Ba3 (17.cd4 d5 18.Ncd2=) 17...c5 (better is 17...Nc5!? 18.Bc5 dc5=) 18.cd4+/– Ne4? (better is 18...Rd8+/–) 19.Be4+– Nf6 (19...Ra6 20.a5+–) 20.Bg6! Be6 (20...fg6 21.Nd6) 21.Bc2 cd4 (21...Bd5 22.dc5 dc5 23.Re8 Re8 24.Qb5+–) 22.Re6! Re6 (22...fe6 23.Nd6) 23.Nd4 (23.Qb7?! Qb7 24.Rb7 Ne4+–) 23...Ree8 (23...d5 24.Ne6 fe6 25.Nd6+–) 24.Nd6 Red8 (24...Re5 25.N4f5 b5+–) 25.Ne6! fe6 26.Qe6 Kh8 27.Nf7 Qf7 28.Qf7 Rd7 (28...b5 29.Bb2 Ra6 30.ab5+–) 29.Qg6 Ra5 30.f4 (30...Ra8 31.Bb2+–) 1–0. market (2270) – Wreck_of_GM (2320), GameColony.com, 2002.

4.b5 cb5 5.Nc3 b4 6.ab4 Nc6 7.b5 Nb4 8.Nf3 e6 (better 8...Qc7!?+=) 9.Na4+– Qd8 (9...Qd6 10.d3 f5+–) 10.c3 d5 (10...Nf6 11.e5 Ne4 12.cb4 Bb4 13.Ba3+–) 11.e5 (11.cb4?! de4 12.Ne5 Bb4+–) 11...d4 (11...f6 12.cb4 Bb4 13.Bb2+–) 12.cb4 Bb4 13.Bb2 Ne7 14.Bd4 0–0 15.Bc4 Nf5 16.Bb6 Qe7 17.0–0 f6 (17...Qe8 18.Qe2+–) 18.d4 fe5 19.Ne5 Qf6 20.Qe2 Ne7 (20...Bd6 21.Bc5 Bc5 22.dc5+–) 21.Bc5 Bc5 22.dc5 Nd5 (22...Ra7 23.Nb6 Rd8 24.Rfd1+–) 23.Bd5 ed5 24.Nb6 Rb8 (24...Be6 25.Na8 Ra8 26.c6+–) 25.Ned7 Bd7 26.Nd7 Qf7 27.Nb8 Rb8 28.Ra5 Re8 29.Qd3 (29.Qd3 g5 30.Rd1+–) 1–0. Vendelo – Kauen, internet, 2020.

4.c3 ab4 5.Qb3 d6 (5...d5!? 6.ed5 Nf6 7.cb4 cd5=+) 6.cb4=+ Nf6 7.Qc2 e5 8.Nf3 Bg4 9.Be2 Nbd7 10.Bb2 Be7 11.h3 Bh5 12.0–0 0–0 13.Kh1 (13.d3 Qa7=) 13...Rac8 14.d3 d5 (better 14...c5!? 15.Qd2 cb4 16.ab4 d5 17.Ne5 Ne5 18.Be5 Bb4=+) 15.Ne5= Ne5 16.Be5 de4 17.de4 Be2 18.Qe2 Nd7 (18...c5 19.Nd2+=) 19.Bh2 (19.Bg7 Kg7 20.Qg4 Kh8 21.Qd7 Bf6+–) 19...Bf6 (19...Qb5 20.Nc3 Qe2 21.Ne2+=) 20.Ra2 (20.e5 Be7+–) 20...Ne5? (20...Qb5 21.Qb5 cb5 22.Rd2+=) 21.Nd2 (21.f4 Nd7+–) 21...Rcd8 (21...Qb5 22.Qb5 cb5 23.Be5 Be5 24.Nf3+–) 22.f4+– Nd3 23.e5 Bh4? (23...Be7 24.Ne4 c5 25.f5 cb4 26.f6+–) 24.Nf3 (24.Nc4 Qa6 25.Nd6 Be7+–) 24...Nf2? (better 24...Be7!?+–) 25.Rf2+– Bf2 26.Qf2 Qf2 27.Rf2 Rd1 (27...Rd3 28.Bg1 Ra8 29.Kh2+–) 28.Ng1 (28.Bg1!? Ra8+–) 28...Ra1 29.Rf3 Rc8 (29...Ra8 30.Rd3+–) 30.g4 (30.Rd3 Ra8+–) 30...c5 (30...Ra8 31.Rd3+–) 31.Rc3 (31.bc5!? Rc5 32.Rb3 Ra5 33.Rb7 h5+–) 31...c4+– 32.Kg2 (32.f5 b5 33.Bf4 Ra2+–) 32...b5 (32...Ra2 33.Kg3 b5 34.Nf3=) 33.Kg3 (33.Ne2!? Ra2 34.Kf3+–) 33...Ra8= 34.Ne2 R8a3 35.Ra3 (35.Kf2!?=) 35...Ra3=+ 36.Kg2 (36.Kf2 Rb3 37.f5 Rb4=+) 36...Rb3–/+ 37.f5 Rb4 38.e6 fe6 39.fe6 Rb2 40.Kf2 c3 (40...b4 41.Be5 Ra2–/+) 41.Bd6? (better 41.Ke3!?=) 41...c2–/+ 42.Ba3?? (better 42.Bf4!? Rb1 43.Kf3–/+) 42...Ra2 (better 42...c1Q 43.Bb2 Qb2–+) 43.Bc1 b4 44.Nd4? (44.Ke1 b3 45.Kd2–+) 44...Kf8 (better 44...Ra1 45.Ne2 b3–+) 45.Ke2+= Ke7 46.Kd2 Ra3?? (better 46...h6+=) 47.Ba3+– ba3 48.Kc2 1–0. Amun (1825) – gmbridge (1900), lichess.org, 2019.

3.c3 a5

4.Qa4 e5 5.Nf3= d6 (5...Nf6 A) 6.d3 Qc7 (6...d5 7.Ne5 Qc7 8.f4 b5 9.Qc2 de4 10.de4 Nbd7 11.Nd3 ab4 12.e5 Nd5; 6...Ra6 7.Ne5 ab4 8.Qc2 d5 9.d4 Ra8 10.ed5 Nd5 11.Nc4 Qc7 12.Bd3 Qe7) 7.Nbd2 b5 8.Qb3 ab4 9.cb4 Na6 10.a3 Be7 11.Bb2 0–0 12.Rc1 c5; B) 6.Ne5 Ne4 7.Nd3 d5 8.f3 Nf6 9.Ba3 Nbd7 10.ba5 Ra5 11.Qb3 Ba3 12.Na3 0–0; C) 6.Be2 Na6 (6...Ra7 7.b5 cb5 8.Qb5 Qb5 9.Bb5 Ne4 10.d3 Nd6 11.Na3 Nc6 12.0–0 f6) 7.Qa5 Qa5 8.ba5= d6 9.d3 Nc5 10.Nbd2 Ra5 11.Nc4 Ra6 12.Ba3 Be6) 6.b5 (6.d4 Nf6 (6...Be6 7.de5 de5 8.Be3 Qd8 9.Nbd2 b5 10.Qc2 ab4 11.c4 Nf6 12.cb5 Ng4; 6...ed4 7.Nd4 Nf6 8.Be3 Ng4 9.Be2 Ne3 10.fe3 Na6 11.0–0 Be7 12.ba5 Qb2; 6...Nd7 7.Nbd2 Ngf6 8.Be2 Be7 9.0–0 0–0 10.Bb2 Qc7 11.Qc2 d5 12.a3 Re8; 6...Qc7 7.Bd3 b5 8.Qa3 Nf6 9.0–0 Bb7 10.Nbd2 Be7 11.Qb3 Nbd7 12.ba5 0–0) 7.Nbd2 Be6+= (7...Be7 8.Be2 0–0 9.0–0 Qc7 10.Bb2 Nbd7 11.Qc2 Nb6 12.b5 cb5) 8.Bc4 Nbd7 9.0–0 Be7 10.Be6 fe6 11.Ba3 ed4 12.Nd4 Kf7; 6.Bc4 Na6 (6...Qd8 7.b5 Nf6 8.d3 Be7 9.0–0 0–0 10.Nbd2 d5 11.ed5 cd5 12.Bb3 Nbd7; 6...Be7 7.0–0 Nf6 8.d4 Ne4 9.Re1 Bf5 10.Bd3 d5 11.g4 Bg4 12.Ne5 Be6) 7.d4 ab4 8.Qb3 Qc7 9.cb4 Nf6 10.Nc3 b5 11.Be2 Be7 12.d5 Rb8; 6.Na3 Nf6 (6...Qc7 7.Bc4 Nf6 8.0–0 Nbd7 9.Bd3 Be7 10.Bb2 0–0 11.Qb3 ab4 12.cb4 Nb6) 7.Bd3 Qa7 8.Bb2 b5 9.Qd1 ab4 10.cb4 Be7 11.Nc2 0–0 12.0–0 Nbd7) 6...Bd7 (6...Nf6 7.Na3 Nbd7 (7...Qc7 8.Qc2 Nbd7 9.bc6 bc6 10.d4 Be7 11.Bd3 0–0 12.0–0 Rb8) 8.Qc2= (8.Nc4 Qc7 9.bc6 bc6 10.d4 Ne4 11.Qc2 Nef6 12.de5 Ne5) 8...Nc5 9.Nc4 Qc7 10.b6 Qd8 11.Be2 Be7 12.Ba3 Nce4; 6...Nd7 7.d4 Ngf6 8.Nbd2 Qc7 9.Qc2 d5 10.Rb1 Bd6 11.Bd3 0–0 12.0–0 cb5) 7.Na3+= cb5 (7...Nf6 8.Nc4 (8.Rb1 Be7 9.Nc4 Qd8 10.Ne3 0–0 11.Ba3 g6 12.h3 Kg7) 8...Qd8 9.Ne3+= Be7 10.Rb1 0–0 11.Ba3 g6 12.h3 Kg7) 8.Bb5+/– (worse is 8.Nb5 Na6= 9.d4 Nf6 10.de5 Nc5 11.Qd4 Nfe4 12.Rb1 Qc6) 8...Bb5? (better is 8...Nf6!?+/– 9.Qc4 Qc5 10.Qc5 dc5 11.d3 Bd6 12.Nc4 Ke7) 9.Nb5+– (9.Qb5?! Nd7+/–) 9...Nc6? (better is 9...Nd7 10.d4 Rc8 11.de5 Qc6 12.ed6 Nc5+–) 10.Rb1 Qd8 11.0–0 (11.d4 f5 12.ef5 Nf6+–) 11...Be7 (11...Nf6 12.Rd1 d5 13.d4 Ne4 14.c4+–) 12.d4 Kf8 (12...ed4 13.cd4 Kf8 14.e5+–) 13.Rd1 f6 (13...ed4 14.Nfd4 Nf6 15.Nf5+–) 14.d5 (14.Ba3!? ed4 15.Nfd4 Nd4 16.Nd4 Qc8+–) 14...Nb8 15.Be3 (15.Ba3 Nh6+–) 15...Nd7 16.Na3 (16.c4 b6+–) 16...Qc7 17.Nb5 Qd8 18.c4 Nh6? 19.Bh6 gh6 20.Qa3 Nc5 21.Nh4 Rg8 22.Nf5 Ne4 23.Nh6?? Rg6+/– 24.Qe3 Nc5 25.Nf5 Qd7 26.Nfd6?? Bd6–+ 27.Nd6 Qd6 28.Rb5 Rc8 29.Ra5 f5 30.Qf3 Kg7 31.Qf5–/+ Rf8 32.Qc2 Qb6 33.Rb5+= Qa7 34.Qc3 Ne4 35.Qe5 Kh6 36.Qe4?? Qf2 37.Kh1 Qf1!! 38.Rf1 Rf1 0–1. Tiedemann,Joern (1940) – Langschmidt,Dirk (2100), RSX20E – NoEngine–Grossturnier–1, 2010.

4.Qa4 Nf6 5.e5 Ne4 6.d4 d5 (6...h6!?+=) 7.f3+/– Nc3 8.Nc3 Qd4 9.Nge2 Qe5 10.b5 e6 11.Bf4 Qf6 12.Rc1 d4? (12...e5 13.bc6 bc6 14.Nd5 Qd8 15.Rc6 Bd7 16.Nc7 Qc7 17.Rc7 Ba4 18.Be5 Nc6=) 13.Ne4 Bb4 14.Kf2 Qe7 15.bc6 (< 15.Nd4 e5 16.Bg5 f6 17.bc6 0–0+–) 15...Nc6 16.Nd4 Bd7 17.Nc6 Bc6?? (17...bc6 18.Bg5 f6+–) 18.Rc6! Qd7 (18...bc6 19.Qc6) 19.Re6! fe6 (19...Kd8 20.Qd7 Kd7 21.Rb6+–) 20.Bb5 (20...0–0 21.Bd7 Rf4 22.Be6 Kh8 23.Qd7+–) 1–0. Trkn – guest922, ICC, 2004.

4.Qa4 g6 5.Nf3 Bg7 6.d4 Nf6 7.Bd3 0–0 8.0–0 d6 9.Bg5 Bg4 10.Nbd2 Nbd7 11.b5 Rfc8 12.Rab1 c5 13.h3 Bf3 14.Nf3 cd4 15.cd4 e5 16.de5 Nc5 17.Qd4 de5 18.Qd5?? Nd5–+ 19.ed5 Nd3 20.Be3 Qd6 21.Ne1 e4 22.Nd3 ed3 23.Rb3 Bc3 24.b6 Qd5 25.Rc1 d2 26.Rd1 a4 27.Rbb1 Qa2 28.g3 Qc2 29.Kg2 a3 30.Bd2 Bd2 31.Rf1 a2 32.Ra1 Ra3 33.Ra2 Ra2 (34.h4 Qc6 35.Kh3 Qb6–+) 0–1. Taulien,Hans_Juergen – Gross,Karl, remoteschach.de, 2002.

4.ba5 Qa5 5.Bc4 Nf6 6.d3 d5 7.ed5 cd5 8.Bb3 Nc6 9.Bd2 Bf5 10.d4 e6 11.Ne2 Qa6 12.0–0 Bd3 13.Re1 Bd6 14.Nc1 Bc4 15.Bg5 Ne4 16.Bh4 0–0 17.Bc2 Qb6 18.Be4 Qb2 19.Bh7? Kh7–+ 20.Qh5 Kg8 21.Bf6 Ne7 22.Qg5 Ng6 0–1. Odachowski,M (1800) – Szafraniec,T (2475), corr, 2001.

4.ba5 Ra5 5.d4 e5 (5...d5 6.Nd2+=) 6.Nd2 Qa7 (6...d5 7.de5 Rc5 8.Qc2+/–) 7.Nc4+/– Ra2 8.Ra2 Qa2 9.de5 Bc5 10.Nd6 Bd6 11.Qd6 Qb1 12.Kd2 (worse is 12.Qb8 Qc1 13.Ke2 Qc2 14.Ke3 Qc3 15.Bd3 Qc1 16.Kf3 Ne7–/+) 12...Qa2 13.Ke3 Qa7 14.Kf3 c5 15.Kg3 Ne7 16.Nf3 b6 17.Bg5 Nbc6 18.Bb5 Qa5 (18...h6 19.Be7 Ne7 20.Rd1+/–) 19.c4+– h6 20.Be7 Ne7 21.Rd1 Qa7 22.e6 fe6 23.Ne5 Nc6 (23...g5 24.Qe6 Rh7 25.Nd7 Qc7 26.Kf3 Rg7+–) 24.Bc6 g5 25.Qe6 (25.Qe6 Kd8 26.Nf7 Kc7 27.Qd6#) 1–0. Sodomski,Andrzej (1930) – Stasiak,Wiktor, 55. Championship Poland Quarterfinal, 2008.

3.c3 d5

4.ed5 cd5 5.Nf3 Nf6 6.d4 e6 7.Bd3 Bd6 8.0–0 0–0 9.Bg5 Ne4 10.Be4 de4 11.Nfd2 Qc7 12.Qh5 f6 13.Be3 f5 14.Nb3 Nd7 15.Bg5 Nf6 16.Bf6 Rf6 17.Qe8 Rf8 18.Qh5 e5 19.d5 Qc4 20.Rd1 b6 21.Nc1 a5 22.ba5 Ra5 23.Nd2 Qc3 (23...Qd5?! 24.Ndb3 Qc6 25.Na5 ba5 26.Nb3=) 24.Ncb3 g6 (24...Rd5?! 25.Ne4 Qc6 26.Rd5 Qd5 27.Ng5=+) 25.Qh6 Rd5 26.Rab1 Ba6 27.Rdc1 Qd3 28.Rb2 Rf7 29.Rd1 Bf8 30.Qg5 Qe2 31.Rdb1 Ba3 32.Rc2 f4 33.Rf1 e3 34.fe3 fe3 35.Rf7 ed2 36.Nd2 Kf7 37.Rc7 Ke8 38.h4 Bd6 39.Rc6 Rd2 40.Rc1 (40.Kh2–+) 40...e4 (41.Qd8 Kd8 42.Rc8 Bc8 43.g4 Qd1) 0–1. Bestia03g – AnMon509, computer chess game, 2000.

4.e5 (--> 2.e4 d5 3.e5 Qb6 4.c3).

3.c3 e5

4.Na3 Nf6 5.d3 d6 6.Be3 Qc7 7.c4 (7.Qe2 d5+=) 7...d5–/+ 8.c5 Be7 9.ed5 Nd5 10.Qd2 Be6 11.g3 (11.Nf3 Nd7–/+) 11...Nd7 12.Bh3 Bh3 13.Nh3 a5 14.Nc2 ab4 15.Nb4 Ne3 16.fe3 Bc5 17.0–0 0–0 18.Nf2 Qd6 19.Rfb1 f5 20.Nc2 Ra7 21.Ne1? (21.d4 ed4 22.ed4 Bb6–+) 21...Nf6 (21...f4 22.Ne4 fe3 23.Qe2–+) 22.Rb3 (22.Ng2 Nd5 23.Rb3 f4 24.gf4 ef4–+) 22...Rfa8 23.Ng2 Nd5 24.Qc1 (24.Qe2 b5–+) 24...b5 (24...Ra2?! 25.Ra2 Ra2 26.Rb7–+) 25.Qd2 Ra3 26.Rb2? (26.Ra3 Ra3 27.Qe2–+) 26...Bb4 27.Qc1 Bc3 28.Rc2 (28.e4 Ne7 29.Ne3 Qd4–+) 28...Ba1 29.Qa1 Nb4 30.Rd2 Ra2 31.Ra2 Ra2 32.Qb1 c5 33.Nh1 g6 34.Nf2 Qd5 35.Ne1 f4! 36.Ng4 Kg7 37.e4 Qd4 38.Kh1 Qc3 0–1. Polasinski,Zbigniew – Olszowski,Andrzej (1895), Gora Sw Anny op 1st Poland, 2008. (=1.b4 c6 2.e4 Qb6)

4.Nf3 d6 5.Bc4 (5.Na3 Nf6 6.Bd3 (6.d4 Nbd7 7.Bd3 ed4 8.Nc4 Qc7 9.Nd4) 6...Be6+= 7.Ng5 d5 8.ed5 cd5 9.0–0) 5...Be7 (5...Nf6!? 6.0–0 (6.Qb3 d5 7.ed5 cd5 8.Bd5 Nd5 9.Qd5) 6...d5= 7.Bb3 Bd6 8.d4 Nbd7 9.Be3) 6.Qb3+– (6.d4 ed4 7.Qd4 Nf6 8.Be3 Qd4 9.Bd4) 6...Nf6 (6...Nh6 7.d4 (7.0–0 0–0 8.d3 Nd7 9.Bh6) 7...0–0 8.0–0 (8.Bh6 gh6 9.de5) 8...ed4 9.cd4+=) 7.Bf7 Kd8 (7...Kf8!? 8.0–0 a5+– (8...Bg4 9.d3) 9.d3) 8.d4 (8.0–0 Ne4 (8...Kc7 9.Na3) 9.d3 Nf6+–; 8.d3 Qa6 9.0–0) 8...Ne4 (8...ed4 9.Nd4+– 1.89/9 (9.0–0+–)) 9.0–0 (9.Be3 Qa6 10.de5 de5+–) 9...Nd7 (9...ed4 10.Nd4 Bg5 11.Bg5 Ng5 12.Nd2+–) 10.de5 (10.Be3 Qa6+–) 10...Ne5 11.Ne5 de5 12.Be3 c5?? (12...Qa6 13.a4 Nd6+–) 13.Qd5 (13.Qd5 Bd7 14.Qe4+–) 1–0. Nikolaev,Dmitriy – Poluhovich,Igor (2195), Chervonny, 2008.

2.e4 d5

3.a4 de4–/+ 4.Ra3 (4.Bb2 Nf6–/+) 4...Nf6 5.Bb2 Bf5 (5...e5 6.Rg3–/+) 6.Re3 (6.Rg3 e6–/+) 6...e6 7.b5 Bc5 8.Rg3 (8.Rb3 Qb6 9.Qe2 Nbd7–+) 8...0–0 9.Bc4 cb5 10.ab5 Nbd7 11.Na3 (11.Qe2 Bd6 12.Rb3 Nb6–+) 11...e3! 12.fe3 (12.de3 Qa5 Double attack (12...Qa5 Decoy); 12.fe3 Qc7 Combination) 12...Bd6 13.Rg5 Qe7 14.h4?? (better is 14.Qc1–+) 14...Ba3 15.Bc3 (15.Qa1 Bd6 16.Bd5 Rfb8–+ (16...Nd5?! 17.Rg7 Kh8 18.Rf7 Kg8 19.Re7 Ne7 20.Qa2–/+)) 15...h6 16.Rf5 ef5 17.Rh3 (17.Bd4 f4–+) 17...f4 (17...Rfc8 18.Be2–+) 18.Qf3 fe3 19.d3 (19.Qe3 Qd6 20.Qd3–+) 19...Bb4 20.Ne2 (20.Ke2 Bc3 21.Qb7 Qb4–+) 20...Bc3 21.Nc3 Qb4 22.Kd1 Qc3 23.Qe3 Rfe8 24.Qd2 Qa1 25.Qc1 Re1! 26.Kd2 Qc1 27.Kc3 Qa3 28.Bb3 Rc8 (28...Rc8 29.Kd2 Qc1) 0–1. Maidana,Edgardo R – Schulle,Jozsef, IECC, 2001. (=1.e4 c6 2.b4 d5)

3.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.e4).

3.c3 de4–/+ 4.f3 e5 5.fe4 (better is 5.d3!? ef3 6.Nf3–/+) 5...Qh4–+ 6.g3?? (6.Ke2 Qe4 7.Kf2 Bb4 8.d4 Qh4 9.g3 Qf6 10.Nf3–/+) 6...Qe4 7.Qe2 Qh1 8.Qe5 Be7 9.Qg7 (9.Qe3–+) 9...Bf6 (9...Qg1 10.Qh8 Bh3 11.Qg8 Bf8 12.d4 Qf1 13.Kd2–+) 10.Bg2 Qg1 11.Bf1 Bh3 (better is 11...Bg7 12.d4–+) 12.Qh8 Qf1 0–1. MC Q – marekt, ChessWorld.net, 2004.

3.Nc3 de4+= 4.Ne4 Bf5 (better is 4...Qd4 5.Nc3 Qb4+=) 5.Bd3?? (5.Ng3 Bg6=) 5...e6?? (5...Be4 6.Be4 Qd4–+) 6.Bb2= Be4 (6...Bb4? 7.Bg7 Be4 A) worse is 8.Bh8 Bg2 (worse is 8...Bd3 9.cd3 Qd3 10.Nf3+=) 9.Qg4 Bh1=; B) 8.Be4+–) 7.Be4 Nf6 8.Bf6 Qf6 9.d4? Bb4–+ 10.Kf1 Bc3 11.Rb1 Bd4 12.Nf3 Bc5 13.Rb7–/+ 0–0 14.c4 Rd8 15.Qc2 g6 16.g3 Qa1 17.Kg2= Qf6 18.Rhb1 Rc8 19.Qd2 Qd8 20.Qd8+= Rd8 21.Ne5 Rc8? 22.Nf7+– Rf8 23.Nh6 Kh8 24.f4 Rc8 25.Rf7 Rf8 26.Rfb7 Rc8 27.Nf7 Kg8 28.Ne5 Bd4 29.Nd7 Nd7 30.Rd7 Bc5 31.Kh3 a5? 32.Kg4?? Ra7 33.Bc6!+– Rd7 34.Bd7 Rd8 35.Be6 Kf8 36.h4 Ke7 37.Rb5 Bb4 38.a3! Ba3 39.Ra5 Bb2 40.Bd5 Bf6 41.Ra7 Rd7 42.Rd7 Kd7 43.c5 h5 44.Kh3 Bd4 45.Bf7 Bc5 46.Bg6 1–0. Fortunato,Gino – Donders,Bart, IECC, 2000. (=1.e4 c6 2.b4 d5)

3.d3 d4 4.c4 e5 5.f4? (5.Bd2 Qb6 6.Qb3 Nf6=) 5...Bd6 (better 5...Bb4!? 6.Bd2 Bd2 7.Qd2 ef4 8.Qf4 Ne7–/+) 6.c5=+ Bc7 7.f5 (7.fe5 Na6=) 7...Nf6 8.Bg5 0–0 9.Nf3 h6 (9...b5 10.Nbd2=+) 10.Bf6 (10.Bh4 b5 11.a3 Nbd7=) 10...Qf6–/+ (10...gf6?! 11.Qd2 Kg7 12.Qf2=+) 11.Nbd2 b6 12.g4 (12.Rc1 Nd7–/+) 12...bc5 13.bc5 Nd7 14.Bg2 (14.h4 Qe7–/+) 14...Nc5 (14...Ba5 15.Rc1–+) 15.Nb3 (15.Qc2 Na6–/+) 15...Nb3–+ 16.ab3 a5 (16...Bd6 17.0–0–+) 17.Qd2 (17.h4 Bd6–/+) 17...c5 (17...Rb8 18.Qc2–+) 18.0–0 Bd7 (18...Rb8 19.Ra3–+) 19.Rfc1–/+ Bb6 20.Rc2 (20.Kf2 Bb5–/+) 20...Rad8 (20...Rfb8 21.g5 hg5 22.Qg5 Qg5 23.Ng5–/+) 21.g5 hg5 22.Ng5 (22.Qg5 Qg5 23.Ng5 Rfe8–/+) 22...Qd6 (22...Ra8!?–+) 23.Nf3 g6 (23...Bb5 24.h3–/+) 24.Qg5 (24.Qh6 Rfe8 25.Ng5 Qf6 26.Qh7 Kf8 27.fg6 Qg6 (27...fg6 28.Rf1 Bf5 29.ef5+–) 28.Qh8 Ke7 29.Qe5 Be6+=) 24...Kg7 (24...Rfe8 25.Nh4 Rb8 26.fg6 fg6 27.Ng6=) 25.fg6= Qg6 (25...fg6 26.Ne5 Bb5 27.Rf1 Rf1 28.Bf1=) 26.Qe5 Attacks the backward pawn on c5 26...f6 27.Qe7 (27.Qd6 f5 28.Qg6 Kg6 29.Ne5 Kg7 30.Nd7 Rd7 31.Bh3+–) 27...Kh8 (27...Qf7 28.Qf7 Rf7 29.Kf2=) 28.Nh4 (28.Qd6 Ba7 29.Ra5 Bg4+–) 28...Qg8? (28...Qh5!? 29.Qd6 Ba7+=) 29.Rf2 (29.Qd6 Qe6 30.Ng6 Kg7 31.Qe6 Be6 32.Nf8 Rf8+–) 29...Rf7 (29...Qg5 30.Qd6 Qh4 31.Qb6 Qg5 32.Ra5 Qc1 33.Rf1 Qe3 34.Kh1 Qd3 35.Qc5 Rf7+–) 30.Qd6+– Bc7?? (30...Rb8 31.Raf1 Ba7 32.Rf6 Rb6 33.Ng6 Qg6 34.Rg6 Rd6 35.Rd6 Re7+–) 31.Qc7 Bh3 (31...Rc8 32.Qf4+– (worse 32.Qa5 Rh7 33.Nf5 Qb3+–)) 32.Qa5 (better 32.Qc5 Qg4 33.Nf5+–) 32...Qg5 (32...Rc8+–) 33.Qd8 Kh7 34.Ra8 Qc1 35.Rf1 Qe3 36.Kh1 Kh6 (36...Bg2 37.Ng2 Kh6 38.Qh8 Rh7 39.Rf6 Kh5 40.Qh7 Qh6 41.Qh6 Kg4 42.Qh4) 37.Qh8 Kg5 (37...Rh7 38.Rf6 Kh5 39.Qh7 Kg5 40.Rg6 Kf4 41.Qc7) 38.Rg8 (38.Rg8 Rg7 39.Rg7) 1–0. l_a_c_l_e – thubery, gameknot.com, 2019. (=1.e4 c6 2.b4 d5)

3.Qe2 de4 4.Qe4 Nf6 5.Qd3 =+.

3.Qe2 e6 4.e5 (4.ed5 Bb4 5.de6 Be6=+) 4...Bb4=+ 5.a3 (5.c3 Bf8–/+) 5...Ba5 (5...Qa5 6.c3 Bf8 7.Nf3=+) 6.c3 (6.Qg4 g6=+) 6...Nd7 (6...Ne7 7.Nf3–/+) 7.g3 (7.d4 c5 8.Qg4 g6=+) 7...Bc7 (7...Ne7 8.Nf3–/+) 8.d4 Bb6 (8...Ne7 9.Qh5–/+) 9.Qg4=+ g6 10.Be3 (10.Nf3 c5=+) 10...Ba5 (10...Ne7 11.Ne2–/+) 11.Bg2 (11.h4 Qb6 12.Qe2 Qb3=+) 11...Qb6–/+ 12.Nf3?? (better is 12.Qe2–/+) 12...Qb2–+ 13.0–0 Qa1 14.Bd2 Qb2 15.Ng5 (15.Qf4 h6–+) 15...Nh6 (better is 15...h6 16.Ne6 Ne5–+) 16.Rd1 (16.Qf3–+) 16...Ng4 17.Bh3 h5 (18.Bg2 Nb6–+) 0–1. danelson – eweram, net–chess.com, 2005.

3.e5 Nd7 4.d4 e6 5.c3 b6 6.c4 (better 6.Nf3!?=) 6...Bb4–/+ 7.Bd2 Bd2 8.Nd2 Ne7 9.Ngf3 Ng6 10.g3 (10.Rc1 Bb7=+) 10...0–0 11.h4 dc4 12.Nc4 White is in command 12...b5 (12...Ba6!?–/+) 13.Nd6= Nb6 14.Qc2 Bd7 15.h5 Ne7 16.Ng5 The mate threat is Qxh7 16...g6?? (better 16...Nf5 17.Nh7 Kh7+=) 17.hg6 (17.Nh7 Nbd5 18.Nf8 Qa5 19.Qd2 Qd2 20.Kd2 Rf8+–) 17...hg6 (17...fg6 18.Nh7 Nbd5 19.Nf8 Qa5 20.Ke2 Rf8+–) 18.f4 Nf5 19.Ndf7 (19.Qh2 Nh6 20.Qh6 Qg5 21.Qh7) 19...Rf7+– 20.Nf7 (better 20.Rh8! Kh8 21.Nf7 Kg7 22.Nd8 Rd8 23.Qc5+–) 20...Kf7 21.Rh7 Kg8?? (better 21...Ng7 22.Bd3 Qe7+–) 22.Qh2 Be8 (22...Qe7 23.Re7 Ne7+–) 23.Rh8 Kf7 24.Qh7 Ng7 25.Qg8 (25.Qg8 Ke7 26.Qg7 Bf7 27.Qf6 Kd7 28.Rd8 Rd8 29.Qf7 Kc8 30.Rc1+–; 25.Rg8 Qf6 26.ef6 e5 27.Bh3 ed4 28.Qg7) 1–0. hamiltonharris (1830) – bunnykins (1790), ChessWorld.net, 2012. (=1.e4 c6 2.b4 d5 3.e5)

3.e5 h5 4.d4 g6 (4...Bf5 5.a3=) 5.Be2 (5.Nf3 h4+=) 5...Bg7 (5...h4 6.h3+=) 6.Nc3 (6.Nf3 h4+=) 6...Bf5 7.Nf3 Bg4 (7...f6 8.0–0+=) 8.h3 Bf3 9.Bf3 e6 10.0–0 (10.Ne2 Nd7+/–) 10...Nh6 11.Ne2 Nf5 12.a4 Nd7 (12...Nh4 13.Nf4+=) 13.c3 (13.a5 Qe7+=) 13...Bf8 (13...Nh4 14.Nf4+=) 14.Ng3 Nh6 (14...a5 15.Nf5 gf5 16.Rb1+/–) 15.Qb3 (15.a5 Nf5+/–) 15...Qc7 (15...f6 16.Qc2 Rg8 17.ef6 Qf6 18.a5+/–) 16.Bg5 (16.a5 h4 17.Ne2 Nf5+/–) 16...Be7 (16...Nf5!?+/–) 17.Be7+– Ke7 18.c4 White intends b5 18...dc4 (18...f6 19.Qc2 h4 20.cd5 ed5 21.Ne2 fe5 22.Bd5+– (< 22.Qg6 Rag8 23.Qc2 e4–/+)) 19.Qc4 Nb6 20.Qc5 Kd7 (20...Kd8 21.a5 Nd5 22.b5+–) 21.b5 Nd5 22.Rac1 (22.Rfc1 Ke8+–) 22...Rhc8 (22...Qb6 23.bc6 bc6 24.Qd6 Ke8 25.a5+–) 23.Ne4 Nf5 24.bc6 (better is 24.a5+–) 24...Qc6?? (24...bc6 25.Rb1 Rab8+–) 25.Nf6 Nf6 26.Bc6 (26...Rc6 27.Qb5+– (27.ef6?! Rc5 28.dc5 Kc6+–); 26.ef6?! Qc5 27.dc5 Rab8+=) 1–0. Caissa – 300SPARTANS, Live Game Caissa's Web, 2005.

3.e5 h6 4.Nf3 Bg4 5.h3 Bf3 6.Qf3 e6 7.d4 (7.a3 Qb6= 8.Qc3 Ne7) 7...Bb4+= 8.c3 Be7 9.Nd2 Bg5 10.Rb1 Qc7 (10...b5 11.Qg4 g6 12.h4 Bd2 13.Bd2=) 11.Qg4 Bd2 12.Bd2 f5 (better is 12...g6=) 13.Qg6+– Qf7 14.Qf7 Kf7 15.Rb7 Ne7 16.g4 g6 (16...Rd8 17.g5 h5 18.g6 Ke8 19.Be2+/–) 17.Be2 (better is 17.c4+–) 17...Na6?? (better is 17...c5 18.gf5 gf5+/–) 18.Ba6 Rab8 19.Ke2 Rb7 20.Bb7 Rb8 21.Rb1 Nc8 22.gf5 gf5 23.Bh6 Ne7 24.Bg5 Ke8 25.h4 Kd7 26.h5 Ng8 27.Bc6! (27.Bc6 Kc7 28.Rb8 Kb8 29.Bd7+–) 1–0. marre – tigreton, internet, 2010. (=1.e4 c6 2.b4 d5 3.e5)

3.f3 de4 4.fe4 (4.Nc3 ef3 5.Nf3 Nf6–/+) 4...Nf6 (4...e5 5.Nf3 Bb4 6.c3–/+) 5.e5 (5.Nc3 Qd4=+) 5...Nd5 (better is 5...Qd4!? 6.Nc3 Ng4–/+) 6.a3=+ Bg4?? (better is 6...b5=+) 7.Qg4+– Qb6 (7...a5 8.b5+–) 8.Qc8 (8.c4 f5 9.ef6 Nf6 10.Qc8 Qd8 11.Qb7 Nbd7 12.Qc6 a5+–) 8...Qd8 Black gets deadly initiative 9.Qb7 Nd7 (9...Nb6 10.Nf3+–) 10.Qc6 e6 11.d3 (better is 11.Ba6 Rb8 12.Nf3 Rb6+–) 11...Rc8 12.Qb7 (better is 12.Qa4 Qc7 13.Nf3 Qc2 14.Qc2 Rc2+–) 12...Rc2 13.Nd2 (13.Ne2 Ne5 14.Qb5 Rc6+–) 13...Qh4 14.g3 Qg5? (14...Qd4 15.Rb1 Ne5 16.Qb5 Kd8+–) 15.Ngf3 (15.d4 Qe3 16.Ne2 Nc3 17.Qa8 Ke7+–) 15...Qe3 16.Be2 (better is 16.Kd1 Rc7 17.Qa8 Ke7 18.Bb2+–) 16...Nc3 Threatening mate: Qxe2 17.Ng1 Qe5 18.Ngf3?? (better is 18.Qc8 Ke7 19.Ne4 Re2 20.Ne2 Ne4 21.Rb1+–) 18…Qe2# 0–1. epersici – rotterdamchess (1740), net–chess.com, 2006.

3.f3 e5 4.b5 Bc5 5.d4 (5.Ba3 Ba3 6.Na3 de4–/+) 5...Bd4 6.Nc3?? (better is 6.c3 Bg1 7.Rg1 Qh4 8.g3 Qh2 9.Rg2–/+) 6...Bc3–+ 7.Bd2 Ba1 8.Qa1 Nd7 9.Nh3 Ngf6 10.Bd3 cb5 11.Bb5 0–0 12.Ng5 (12.Nf2 Qb6 13.a4 Rd8–+) 12...h6 13.Nh3 de4 14.fe4 (14.Qc3 Nb6 15.Nf2 Nbd5 16.Qe5 e3 17.Be3 Qa5 18.Bd2 Qb5–+) 14...Nc5 15.Qe5 Bh3 16.gh3 Nfe4 17.Rg1 (17.Qf4–+) 17...Qd2 18.Kf1 Qf2 0–1. Doobi – Double Wood, ChessWorld.net, 2005.

3.d3 de4

4.Qd2 Bf5 5.de4 Be4 6.Qd8 Kd8 7.c3 Nf6 8.Nd2 Bg6 9.Ngf3 e6 10.Bc4 Nd5 11.Bb2 Be7 12.0–0 (12.Rd1!?–/+) 12...Bf6–+ 13.Rad1 Nd7 (13...Nc3 14.Bc3 Bc3 15.Ne4 Ke7 16.Nc3+/–; 13...Bc3?! 14.Bd5 Bb2 15.Be6–+) 14.Nd4 N7b6 15.Bb3 Bd4 16.cd4 Nb4 17.a3 N4d5 18.a4 Nb4 19.a5 N6d5 20.Nc4 f6 21.Ne3 b5 22.Rd2 Kd7 23.Rfd1 Be4 24.Nf1 Nf4 25.Ne3 Bd5 26.Nd5 cd5 27.g3 Nh3 28.Kg2 Ng5 29.Re2 Rhc8 30.f3 Nf7 31.Kf2 Nd6 32.h4 (32.Ba3 Nc6 33.a6 b4–+) 32...a6 33.Ba3 Rc3 34.Bb4 Rb3 35.Bd6 Kd6 36.h5 (36.Rde1 Re8 37.Rc2 Rb4–+) 36...Ra3 37.Rc2 Ra4 38.f4 Rb8 39.g4 g5 40.hg6 hg6 41.f5 Rh8 42.Rc3 gf5 43.gf5 e5 (43...Ra5 44.Rdc1 Ra2 45.Kg3 Rg8 46.Kf3+=) 44.Rdc1 Rc4 (44...Ra5 45.Rc6 Ke7 46.Rc7 Ke8 47.Rc8 Kd7 48.Rh8 Ra2 49.Ke1 ed4 50.Rcc8+–; 44...ed4 45.Rc6 Ke5 46.Ra6 Ra2 47.Kg3 Rg8 48.Kh3–+) 45.de5 fe5 46.Rc4 bc4 47.Rb1 d4 48.f6 c3 49.Rf1 e4 0–1. Hofsommer,Michael – Nagel,Ralf, DESC F0022 email, 2004. (=1.e4 c6 2.b4 d5)

4.de4 Qc7 (4...Qd1 5.Kd1 e6 6.a3=+) 5.c3 (5.Nc3 Nf6=) 5...Nf6=+ 6.f3 (6.Nd2!?=+) 6...e6 7.Be3 b6 (7...a5 8.ba5 Ra5–/+) 8.b5? (better 8.Nd2!?=+) 8...Bb7 9.Nh3 Nbd7 10.Qd4 (10.Qc1 Bd6–+) 10...Bc5 (10...Rd8 11.Qc4–+) 11.Qd2 Be3 (better 11...0–0!? 12.Bc5 Nc5 13.bc6 Bc6 14.Qe3–+) 12.Qe3–/+ c5 (12...0–0!?–/+) 13.Bc4 0–0 14.0–0 a6 15.Na3 Ne5 16.Qf4 (16.Be2 ab5 17.Nb5 Qe7=+) 16...Rfc8 (16...Nh5!? 17.Qg5 Nc4 18.Nc4 ab5–/+) 17.ba6=+ Ba6 18.Ba6 Ra6 19.Nb5 Qb8 20.Rfd1 Nc4 (20...h6 21.a3=+) 21.Qb8 (better 21.e5!? Ne5 22.Nd6+=) 21...Rb8=+ 22.a4 g6 (22...Ne8 23.Ra2=+) 23.Nf2 (23.Nd6 Nd6 24.Rd6 Kf8=+) 23...Kf8 24.Rd3 (24.Nd3 Raa8=+) 24...Ke7 (24...Rba8–/+) 25.h3? (25.Rdd1=+) 25...Nb2?? (better 25...Rba8–+) 26.Rd2= Nc4 27.Rdd1 (27.Rd3 Rba8 28.Ng4 Ng4 29.hg4 Ra4–+) 27...Rb7 28.g4 Rd7 29.Re1 e5 30.g5 (30.Red1 Rd1 31.Nd1 Ra8=+) 30...Nh5–/+ 31.Ng4 Nf4 32.Kh2? (32.h4 Rd2–/+) 32...Rd3 (better 32...Rd2!? 33.Kh1 Nh3–+) 33.Kg3–/+ Nd2?? (better 33...Nh5 34.Kg2 Rd2 35.Kh1 Nf4–/+) 34.Ne5+– (34.Ne5 Nh5 35.Kg4+–) 1–0. Elston7 (1815) – Darkseid (1715), ChessWorld.net, 2012. (=1.e4 c6 2.b4 d5)

3.d3 e5

4.c3 de4 5.de4 Qd1 6.Kd1 Nf6 +=.

4.Nf3 de4 5.de4 Bb4 6.c3 Qd1 7.Kd1 Bd6 8.Ng5 f6 9.Nf3 Nd7 10.Nbd2 Nc5 11.Ba3 (better is 11.Bc4!?–+) 11...Ne4! 12.Ne4 Ba3 13.Bc4 b5 14.Bb3 Ne7 15.Kc2 a5 16.Kd3 (16.Kd2 a4 17.Bc2 Bg4–+) 16...f5 17.Neg5 e4 18.Kc2 ef3 19.gf3 (19.Rhd1 g6 20.Bf7 Kf8 21.Rd8 Kg7 22.Rh8 Kh8 23.gf3 Kg7–+) 19...a4 20.Be6 (20.Bf7 Kd7–+) 20...h6 21.Bf7 (21.Bc8 hg5 22.Be6–+) 21...Kf8 22.Rad1 Bb7 23.Rd7 hg5 24.Rb7 Kf7 25.Re1 (25.h3 Bc5–+) 25...Rh2 26.Ree7 Be7 27.Kd3 Ke6 28.Ke3 Bc5 29.Kd3 Rd8 30.Ke2 (30.Rd7 Rd7 31.Ke2 Bf2 32.f4 Bg3 33.Ke3 Bf4 34.Kf3 Rd3) 30...Rf2 31.Ke1 Rh8 32.Re7 Ke7 33.Kd1 Rh1 0–1. Guendling,Harald – Markus,Roland, DESC E0024 DESC email, 1998. (=1.e4 c6 2.b4 d5)

4.Nf3 de4 5.de4 Bb4 6.Nbd2 Nf6 7.Bd3 Nbd7 8.0–0 0–0 9.Qe2 Qc7 10.Rb1 Bd6 11.Nc4 Bc5 12.Bb2 Re8 13.Rbd1 b5 14.Ne3 Nb6 15.c4 a6 16.Bc1 b4 17.Qc2 a5 18.Nh4 Be6 19.Nef5 a4 20.Bg5 Nbd7 21.Be2 Reb8 22.Rb1 b3! 23.ab3 ab3 24.Qd3 Ra2 25.Bf6 Nf6 (25...gf6?! 26.Bd1=) 26.h3 (26.Bd1 b2 27.Bb3 Ra3 28.Rb2 g6–+) 26...Rb4 27.Rfd1 g6 (27...Bc4 28.Qd8 Ne8 29.Qc7 Re2 30.Rd8 Bf8 31.Re8 Re1 32.Re1 h6 33.Rf8 Kh7 34.Qd8 b2 35.Rh8) 28.Ne3 Qd7 29.Nf3 Qd3 30.Bd3 (30.Rd3?? Re2 31.Kf1 Ra2 32.Ne5 Ne4–+) 30...Nd7 31.Bf1 f6 32.Rd2 Be3 33.fe3 Rd2 34.Nd2 b2 35.Kf2 Nb6 36.Bd3 Na4 37.Kf3 Nc3 38.Rf1 c5 39.g4 h5 40.gh5 gh5 (40...Bh3?! 41.Rh1 Bd7 42.hg6–+) 41.Kg3 Kf7 42.Kh4 Rb8 43.Bc2 Ra8 44.Rh1 Ra1 45.Rh2 Nd1 0–1. Hofsommer,Michael – Rohde,Matse, DESC F0022 email, 2004. (=1.e4 c6 2.b4 d5)

3.ed5 cd5

4.a4 e5 5.Bb5 Nc6 6.c3 Bd6 7.Bc6 bc6 8.Nf3 e4 9.Nd4 Ne7 10.Qh5 0–0 11.Qh4 Re8 12.d3 ed3 13.Nf3?? (better is 13.0–0–+) 13...Ng6 14.Kd2 Nh4 15.Kd3 Bf5 16.Kd2 Qe7 17.Re1 (17.Ne5 Qe5 18.Bb2 Qe2 19.Kc1 Qc2) 17...Nf3 18.gf3 Qe1 0–1. Dixon,Grant – Kravchenko,Daniil, OP–2011–0–01386, 2011. (=1.e4 c6 2.b4 d5 3.ed5 cd5)

4.Bb2 Qb6 5.a3 d4 6.Nf3 Nc6 7.Bc4 Nf6 8.d3 e6 9.0–0 Bd6 10.Nbd2 a6 11.Re1 0–0 12.Nb3 e5 13.Nbd2 Qc7 14.h3 b5 15.Bb3 a5 16.ba5 Na5 17.Rc1 Nb3 18.cb3 Qb8 19.b4 Bf5 20.Nb3 Re8 21.Nc5 h6 22.Re2 Bc5 23.Rc5 Nd7 24.Rc1 Be6 25.Nd2 Bd5 26.Ne4 Qb6 27.Qe1 Qg6 28.f3 Rac8 29.Kh1 Rc1 30.Qc1 Bc6 31.Rd2 f5 32.Nc5 Qg3 33.Nd7 Bd7 34.Re2 Rc8 35.Rc2 Rc2 36.Qc2 Qe1 37.Kh2 f4 38.Qc7? Bh3!–+ 39.gh3 Qg3 40.Kh1 Qh3 41.Kg1 Qg3 42.Kf1 Qf3 43.Ke1 Qe3 44.Kd1 Qd3 45.Kc1 f3 46.Qd8 Kh7 47.Qh4 Qe3 48.Kb1 f2 (49.Qf2 Qf2–+) 0–1. SteVeYBoY (1650) – Klaus Behrmann (2420), ChessWorld.net, 2003.

4.Bb2 Nc6 5.b5 Qb6 6.Nf3=.

4.Bb2 d4 5.c4 (better is 5.Nf3!?+/–) 5...e5= 6.Qh5 Qc7 7.Nf3 Nd7 (worse is 7...Bb4 8.Qe5 Qe5 9.Ne5+=) 8.Ng5 g6 9.Qf3 f6 (9...Ngf6 10.c5 Bh6 11.Ne4 Ne4 12.Qe4+=) 10.Ne6= Qb6 11.Nf8 Nf8 12.a3 Be6 13.d3 Nd7 14.Nd2 Nh6 15.h3 0–0 16.g4 Nf7 17.Ne4 Ng5 18.Qe2 Ne4 19.de4 a5 20.c5 Qc6 21.b5 Qc5–/+ 22.Rc1 Qd6 23.f3 Rfc8 24.Rc8 Rc8 25.Qd1 b6 26.Rh2 Nc5 27.Rc2 Bb3?? 28.Bc4?? Bc4–+ 29.Rc4 Rc7 30.Rc2 Ne6 31.h4 Kg7 32.Kd2 Nf4 33.Rc7 Qc7 34.Qc2 Qc2 35.Kc2 h5 36.gh5 gh5 37.Bc1 Ng2 38.Kd3 Nh4 39.f4 Ng2 40.fe5 fe5 41.Ke2 h4 42.Kf2 Nf4 43.Bd2 Ne6 44.Kf3 Kg6 45.Kg4 Nc5 46.Kh4 Ne4 (46...Ne4 47.Be1 Nc3–+) 0–1. Rheindt,Stefan (2015) – Maier,Ralf (2005), RSS4D easy–32, 2007. (=1.e4 c6 2.b4 d5 3.ed5 cd5)

4.Bb2 e6 5.a3 Nf6 6.Nf3 Bd6 7.c4 dc4 8.Bc4 0–0 9.0–0 Bd7 10.d4 b5 11.Bb3 Bc6 12.Re1 Qc7 13.Ne5 Bb7 14.Nc3= a6 15.Nf7 Rf7 16.Be6=+ Kh8 17.Bf7+= Qf7 18.Rc1 Nbd7 19.h3 Bf4 20.Rc2 Nd5 21.Qf3 1–0. dragonpower (2295) – supertimchan (2000), net–chess.com, 2003.

4.Bb2 e6 5.a3 Nf6 6.Nf3 Be7 7.d4 (7.Nc3 a5=) 7...0–0 8.Nbd2 Nc6 (8...Bd7 9.Bd3=) 9.Bd3 Bd6 (9...Bd7 10.0–0=) 10.0–0+= b6 11.Ne5 Bb7 12.f4 Ne7 13.Qe2 Rc8 14.Rf2 Bb8 15.Raf1 Nf5 16.Rf3 Nd6 17.Rh3 Nde4 (17...h6!?=) 18.c4+= Re8 19.c5 h6 (19...Nd2 20.Qd2 Ne4 21.Qd1+=) 20.Bb5 Rf8 21.c6 Ba8 22.Ba6 (22.Ndf3 Bd6+/–) 22...Rc7 (better is 22...Rc6!? 23.Nc6 Bc6+=) 23.b5+/– Re7 24.Rc1 (24.a4 Nd2 25.Qd2 Bd6+/–) 24...Bd6 25.Nf1 Kh7 26.Ne3 Ne8 27.Qh5 N4f6 (27...N8f6!? 28.Qh4 Kg8+/–) 28.Qh4 Qc7 (28...Kg8 29.f5+–) 29.g4 (better is 29.f5 Qd8+–) 29...Rh8? (better is 29...Ne4 30.g5 f6+–) 30.g5 Ne4 31.N3g4 (better is 31.gh6 g6 32.N3g4+–) 31...Kg8 32.gh6 (better is 32.Kg2!?+–) 32...Rh7+/– 33.Rc2 N4f6?? (better is 33...f5 34.Rg2 fg4 35.Qg4 N8f6+/–) 34.Rg2 (34.Nf6 Nf6 35.Rg2 Ne8+–) 34...Ng4 (34...Ne4 35.Bc1+–) 35.Qg4 Be5 (35...Qd8 36.a4+–) 36.fe5 f5 (36...g6 37.a4 Qd8+–) 37.Qg6 Qd8 (37...Rh8 38.h7 Kf8+–) 38.Qh7! 1–0. Meszaros,Andras (2250) – Nominerdene,Davaademberel (1980), Kecskemet HUN, Closed IM July, 2014. (=1.e4 c6 2.b4 d5 3.ed5 cd5)

4.Bb2 e6 5.a4 Nf6 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+–) 6.f3 (better 6.b5!?=+) 6...Bb4–+ 7.c3 Be7 8.g4 (8.Bb5 Nc6–+) 8...Qb6 (8...0–0 9.Qc2–+) 9.Ba3 Ba3 10.Ra3 Bd7 11.a5 Qd6 12.g5 (better 12.Ne2!?–+) 12...Qe5 13.Ne2 Qg5 14.h4 Qe5 15.d4 Qd6 16.Qb3 Bc6 (16...Nc6 17.h5–+) 17.c4 (17.Kd1 0–0–+) 17...dc4 18.Qc4 0–0 19.Rc3 Nd5 20.Qc5 Qd8 21.Rb3 Nd7 22.Qd6 (22.Qa3 Rc8–+) 22...Qa5 23.Nec3 Qc7 24.Ne4 Qd6 25.Nd6 N7b6 26.Bb5 Rfd8 27.Bc6 bc6 28.Nb7 Rf8 (28...Rdb8 29.Nc5–+) 29.h5 (29.Na3 Rab8 30.Nc5 Rfd8–+) 29...Ne7 (29...Rfb8 30.Nc5–+) 30.h6 (30.Nc3 Nf5 31.Ne2 Rfb8–+) 30...g6 (30...Nf5 31.Nd2–+) 31.f4 (31.Na3 Nf5 32.Rd3 Nd5–+) 31...Nbd5 32.Rh4 (32.Nc3 Nc3 33.Rc3 Rfb8–+) 32...Rab8 33.Nd2 (33.Rh2 Nf5 34.Rd2 Nf4–+) 33...Nf5 34.Rg4 Nh6 35.Rh4 (35.Rg2 Nf5 36.Nf3 Nf4–+) 35...Nf5 36.Rh2 Nd4 37.Nc5 (37.Rb1 Nf4 38.Kf2 e5–+) 37...Rb3 (better 37...Nb3 38.Ndb3 Nf4 39.Ra2–+) 38.Ncb3 Nb3 39.Nb3 Nf4 40.Rd2 Rc8 41.Nc5 h5 42.Na6 (42.Rd7 Ra8–+) 42...h4 43.Kf2 c5 44.Kf3 g5 45.Rd7 Kg7 46.Ra7 c4 47.Nb4 Kg6 48.Nc2 f5 49.Ne3 Nd5 50.Ra6 g4 51.Kf2 Ne3 52.Re6 Kg5 53.Ke3 (53.Re3 c3 54.Re1 c2–+) 53...h3 54.Kf2 c3 55.Re1 f4 56.Re5 Kh4 57.Re7 c2 (57...c2 58.Re1 c1R 59.Rc1 Rc1 60.Ke2 h2 61.Kd2 h1Q 62.Kd3 Qd5 63.Ke2 Qe4 64.Kf2 Qf3) 0–1. hamiltonharris (1845) – piggly (1925), ChessWorld.net, 2009. (=1.e4 c6 2.b4 d5 3.ed5 cd5)

4.Bb2 e6 5.Nf3 Nf6 6.b5 Bd6 7.Bd3 Nbd7 8.0–0 e5 9.Be2 Qc7 10.Kh1 e4 11.Nd4 Nc5 (worse is 11...Bh2 12.g3 Bg3 13.fg3 Qg3 14.Nf5 Qh3 15.Kg1=) 12.a4 0–0 13.a5 Bh2 14.g3 Qd7 15.Kh2 Qh3 16.Kg1 Ng4 17.Bg4 Bg4 18.f3 Qg3 19.Kh1 0–1. Reussner,Hans Dieter – Roewekamp,Kai, DESC D0474 email, 2007. (=1.b4 c6 2.e4 d5 3.ed5 cd5)

4.Bb2 Bf5 5.Nf3 e6 6.a3 Nc6 7.Bb5=.

4.Bb2 Bf5 5.Nf3 e6 6.a3 Nf6 7.d3 (7.Nd4 Bg4 8.f3 Bh5+=) 7...Be7 (7...Bd6 8.Nd4=+) 8.Nbd2 (8.Nd4 Bg6=+) 8...b5 (8...0–0 9.Nd4 Bg4 10.f3=+) 9.Nd4= a5 10.c3 ab4 (10...0–0 11.Be2=) 11.ab4 Ra1 12.Qa1 0–0 13.Be2 Qd7 14.Nf5 ef5 15.0–0 Nc6 16.d4 White gets the initiative 16...Rb8 17.Qa6 Qb7 (17...Ne8 18.Re1 Nc7 19.Qa1+=) 18.Ra1 Nd7 (18...Ne4 19.Qb7 Rb7 20.Ra8 Bd8 21.Nf3+/–) 19.Qb7 Rb7 20.Ra8 Ndb8 21.Bf3 Rd7 22.Nb3 (22.Nb1 Bg5+/–) 22...g5 (22...Kf8 23.Nc5 Bc5 24.bc5+/–) 23.Na5 (23.Be2 Rb7+–) 23...Kg7 24.Be2 Ra7 ½–½. Blumenberg,Walter – Funk,Oliver, Porz op, 1990.

4.Bb2 Bf5 5.Nf3 e6 6.Bb5 Nc6 7.Nd4 Nge7 8.0–0 Bg6 9.Ba4 (9.a3 a6 10.Be2 Nd4 11.Bd4 Qc7=+) 9...Qb6 10.a3 0–0–0 11.Nc6 (11.Nb3 Nf5=) 11...Nc6 12.Qe2 (12.Re1 Bc5 13.bc5 Qb2+–) 12...d4 13.d3 Bd6 14.Nd2 Qc7 15.h3 e5 (15...Ne7 16.Rfc1 Bh2 17.Kh1=) 16.Rfc1+= Kb8 17.c3 dc3 18.Bc3 Qe7 (18...f6 19.b5 Ne7 20.Be5 Bd3 21.Qe3+= (< 21.Qd3 Be5 22.Qb3 Nc6=)) 19.Bc6+/– bc6 20.Bb2 Rc8 21.Nb3 (21.Rc2 f6+/–) 21...f6 22.Na5 Exerts pressure on the isolated pawn 22...Be8 (22...Qd7 23.Rc3 Bf7 24.Rac1+/–) 23.Qf3 Qd7 (23...c5 24.Bc3+/–) 24.d4 ed4 25.Bd4 Bh2 (25...Qc7 26.Rc4+–) 26.Kh2 Qd4 27.Kg1 (27.b5 Qd5 28.Qg3 Ka8 29.Nc6 Bc6 30.bc6 Rc6 31.Rc6 Qc6 32.Qg7 Rb8+–) 27...Rg8 28.Rd1 Qe5 29.Rac1 Qc7 30.Rc5 Bd7 31.b5! Qa5 (31...cb5 32.Rc7) 32.Rd7 Rc7 (32...a6 33.bc6 Qc5 34.Qb3 Qb5 35.Rb7 Ka8 36.Rb5 ab5 37.Qf7 Rc6 38.Qg8 Kb7 39.Qg7 Rc7 40.Qf6 Rc1 41.Kh2+–) 33.Qb3 (33...Rd7 34.bc6 (34.Qg8?! Qd8 35.Qd8 Rd8+/–) 34...Qb6 35.Rb5 Rd1 36.Kh2 Qb5 37.Qb5 Kc7 38.Qb7 Kd6 39.Qd7 Kc5 40.Qd1+–) 1–0. Kucharkowski,Jens – St_Jean,Benoit, corr or01–009 E–mail, 2001.

4.Bb2 Bf5 5.Nf3 e6 6.Bb5 Nd7 7.c4 (7.Ne5 Ngf6 8.g4=) 7...dc4=+ (7...Bb4?? 8.Bg7 a6 9.Bd7 (9.Bh8?! ab5 10.cd5 Nc5+–) 9...Qd7 10.Ne5+–) 8.Ne5 (8.Bc4 A) 8...Bb4? 9.Bg7 Rc8 10.Bb3+– (10.Bh8?! Rc4 11.Nc3 Bd3+/–); B) 8...Ngf6=+) 8...Ngf6 9.Bc4 (9.Na3 a6 10.Bd7 Nd7 11.Nac4 Ne5 (< 11...Bb4 12.Nd7 Qd7 13.Nb6+/–) 12.Ne5 Qd5–/+) 9...Ne5 (9...Bb4 10.Nd7 Qd7–/+ (10...Kd7? 11.Qa4 Kc8 12.Qb4+–; 10...Nd7?! 11.Qb3 Bd6 12.Bg7=+)) 10.Be5=+ Be7 (10...Bd6 11.Qa4 Kf8 12.Bd6 Qd6 13.Nc3=+) 11.Qa4 Kf8 12.d4 (12.Qb3!?=+) 12...Nd5–/+ 13.a3 Nb6 14.Qb3 (14.Qb5 a6 15.Bg7 Kg7 16.Qe5 Bf6 17.Qg3 Bg6–+) 14...Nc4 15.Qc4 Rc8 16.Qb3 (16.Qc8 Qc8 17.0–0–+) 16...Bf6 (better is 16...Rc1 17.Qd1 Rd1 18.Kd1 f6–+) 17.0–0–/+ Be5 18.de5 g6 (18...Qd4 19.Ra2 Qe5 20.Rd2=+) 19.Nc3 (19.Qe3 Qd5+/–) 19...Kg7 (19...Qd4!? 20.Nb5 Qe5 21.Na7 Rc2=) 20.Rfd1 (20.Nb5!?+=) 20…Qc7= (21.Nb5 Qe5–/+) 0–1. dragonpower (2360) – jjones (2175), net–chess.com, 2003.

4.Bb2 Nf6 5.a3=.

4.Bb2 Nf6 5.b5 e6 6.Nf3 Bd6 7.Be2 0–0 8.d4 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Nbd7 12.0–0 Nb6 13.Nbd2 Bd7 14.Qb1 Nh5 15.c4 (better is 15.g3!?+=) 15...Nf4–/+ 16.Bd3 Nd3 17.Qd3 dc4 (17...dc4 18.Qb1 Bf4–+) 0–1. Grant,Peter J – Galvin,John H, BPCF–USA corr, 1987. (=1.e4 c6 2.b4 d5 3.ed5 cd5)

4.Bb2 Nf6 5.Nf3 e6 6.a3 Bd6 7.c4 (7.Be2 0–0=) 7...dc4 8.Bc4 0–0 9.Nc3 Nbd7 (9...a5 10.b5=) 10.Qe2 (10.0–0 Ne5 11.d3 Qc7=) 10...a6 (10...Nb6 11.Bb5=+) 11.Rc1 b5 12.Ne4 Bf4 (< 12...bc4 13.Nd6 a5 14.Qc4 ab4 15.ab4+/– (< 15.Nc8 ba3 16.Ba3 Ra3=+)) 13.Bd3 Bb7 14.0–0 Rc8 15.Rc8 Qc8 (15...Bc8 16.a4 ba4 17.Ra1=) 16.Nf6 Nf6 17.Bf6 gf6 18.Be4 Rd8 19.d4 Be4 20.Qe4 Qc7 21.Rd1 f5 22.Qd3 Qc4 23.g3 Bh6 24.Qc4 (24.Ne5 Qd5=) 24...bc4=+ 25.Ne5 Rc8 26.f4 c3 27.Rc1 c2 (27...Bg7 28.Kf2 h6 29.Ke3+/–) 28.Kf2 Bf8 29.Ke2 Rc3 30.Nd3 Ra3 (30...Bg7 31.a4=) 31.Rc2+= Kg7 32.Kd2 Be7 33.Rc6 (33.Nc5 Bf6 34.Rc3 Ra2 35.Kd3 a5+=) 33...Bf6 (33...Ra2 34.Ke3+=) 34.Rd6 (34.Ne5 h6+=) 34...h5 (34...Ra2 35.Kc3=) 35.h3 Kf8 (35...Ra1 36.Ke3=) 36.Ke3+= Ra1 ½–½. Kucharkowski,Jens – Schmickt,Bernhard, Orang–Utan Invitational, 2002.

4.Bb5 Nc6 5.c4 (better is 5.Nf3!?=) 5...dc4–/+ 6.Bc4 Qd4 7.Qb3 Qa1 8.Bf7 Kd8 (better is 8...Kd7 9.Be6 Kc7 10.Bg8 Bf5–+) 9.Bg8 Nd4 10.Qd5 Bd7 11.Nf3 (11.Bh7 Rh7 12.Qe4 Rc8–+) 11...e6 (12.Be6 Ne6=; 11...Qb1 12.Qc4 Rc8 13.Qd4 Rc1 14.Ke2 Rh1–+) 0–1. Heinicke – Labahn,Dieter, corr SOK–88–28, 1989.

4.Bb5 Bd7 5.Qe2 a6 6.Bd7 Nd7 7.Nc3 Ngf6 8.Nf3 e6 9.Ba3 b5 10.0–0 Bd6 11.Rae1 0–0 12.Nd4 Rc8 13.Ne6 Bh2 14.Kh2 fe6 15.Qe6 Kh8 16.Qd6 Ng4 17.Kg1 Qh4 18.f3 Rc6 19.Qf8 Nf8 20.fg4 1–0. jsiggy2001 – youam50, playchess.de, 2002.

4.Nc3 e6 5.Rb1 d4 6.Nce2 Nc6 7.b5 Ne5 8.Bb2 Bc5 9.f4 Nc4 10.Ba1 Qb6 11.Nf3 Na3 12.Bd4 Nb1 13.Qb1 Nf6 14.Bf6 gf6 15.d4 Be7 16.c4 a6 17.Nc1 ab5 18.cb5 0–0 19.Bd3 Qa5 20.Kf2 f5 21.Kg1 Bd6 22.g3 b6 23.Qb3 Bb7 24.Kf2 Rfc8 25.Bc4? Bf3 26.Kf3 Qd2 27.Rd1 Qh2 28.Be6 Rc2 29.Bf5 Rf2 30.Kg4 Bf4! 31.Bh7 Qh7 32.gf4 Qg6 (33.Kh3 Qg2 34.Kh4 Rf4 35.Kh5 Qg6#) 0–1. Bestia02c – AnMon503, computer chess game, 2000.

4.d4 Nf6 5.Bb5 Nc6 6.Bc6 bc6 7.c3 (7.Nf3 e6 8.c3 a5=) 7...Bg4 (7...a5 8.ba5 Bf5 9.Ne2=+) 8.Nf3 e6 9.h3 Bf3 10.Qf3 Be7 11.0–0 0–0 12.Nd2 a5 13.a3 (13.ba5!? Ra5 14.Nb3=) 13...ab4–/+ 14.cb4 Bd6 (better is 14...Bb4!? 15.Nb3 Bd6–/+) 15.Nb3= Ne4 16.Na5 (16.Re1 Qh4 17.Be3 Ra7=) 16...Qc7 (better is 16...Bc7=+) 17.Bb2? (better is 17.Re1=) 17...Nd2–+ 18.Qc3 Nf1 19.Kf1 Rac8 (19...Ra6 20.Nb3–+) 20.Rc1 e5?? (better is 20...Qb6!?–+) 21.Nc6 (21.de5 Be7 22.Qc6 Qd8 23.Qc8 Qc8 24.Rc8 Rc8+=) 21...ed4 (better is 21...f6=+) 22.Qd4+/– Bf4?? (22...f6 23.Na7 Qc1 24.Bc1 Rc1 25.Ke2 Rd8 26.Qd5 Kf8+–) 23.Qg7 1–0. waloon (1680) – pkennedy (1660), net–chess.com, 2004.

4.d4 Nf6 5.Nf3 Bf5 6.Bb5 Nbd7 7.0–0 Qb6 8.Nc3 e6 9.a3 Rc8 10.Bd2 Bd6 11.Bd7 Nd7 12.Re1 Nf6 13.Re3 0–0 14.Na4 Qc6 15.Nc5 b6 16.Ne5 Be5 17.de5 Ng4 (17...bc5 18.ef6 gf6 19.Rg3 Bg6 20.Bh6 cb4 21.Bf8 Kf8 22.ab4 Qc2 23.Qe1+=) 18.Rg3 bc5 19.Rg4 Bg4 20.Qg4 Qd7 21.Bh6 f5 22.ef6 Rf6 23.Bg5 Rg6 24.Qf4 cb4 25.ab4 h6 26.Bh4 Rc2 27.Qb8 Rc8 28.Qf4 Qc6 29.Qd2 Rg4 30.Bg3 Rc4 31.Re1 Qb6 32.Rb1 (32.b5 Qb5 33.Rf1 Rc2–+) 32...Qb4! 33.Qb4 (33.Rb4 Rc1) 33...Rb4 34.Ra1 Rbc4 35.h4 (35.Kf1 Rc1 36.Rc1 Rc1 37.Ke2–+) 35...Rc1 36.Rc1 Rc1 37.Kh2 d4 38.Bf4 Re1 39.Kg3 e5 40.Bd2 Re2 41.Ba5 Kf7 42.f4 e4 43.f5 d3 44.Kf4 Rg2 45.Ke4 0–1. Hossa (2275) – WchessX (2790), ICS unrated blitz match, 1998.

4.d4 Nf6 5.Nf3 Bg4 6.h3 Bh5 7.a3 Nbd7 8.Bf4 e6 9.Nbd2 Be7 10.Bd3 0–0 11.0–0 Rc8 12.Rc1 Rc3 13.Nb1 Rc6 14.Nbd2 Bg6 (14...a5 15.c3=) 15.Bg6 hg6 16.c3 b5 17.Nb3 Nh5 18.Bh2 a6 19.Nc5 Nhf6 20.a4 ba4 21.Qa4 Qa8 (21...Qc8 22.Ra1+=) 22.Ra1 Increasing the pressure on the isolated pawn on a6 22...Rfc8 (22...Qc8 23.Rfe1+=) 23.Rfb1 Ne4 24.Qc2 Qa7 25.Rb3 Ndc5 26.bc5 The passed pawn on c5 will become decisive later. White creates threats along 26...Bf6 27.Rba3 Qb7 28.Ne5 White is in command 28...Be5 29.Be5 Rd8 (29...Ra8 30.c4+–) 30.f3 Nf6 31.Qb3 Qb3 32.Rb3 Nd7 33.Bd6 Nf6 34.Rb7 Rd7 35.Rb8 Kh7 36.Ra8 Rb7 (36...g5 37.R1a6 Rd8 38.R8a7 Ra6 39.Ra6+–) 37.R8a6 Ra6 38.Ra6 Ne8 39.Bg3 g5 40.Rb6 Ra7 41.Rb8 Nc7 42.c6 Na8 43.Rb7 Ra1 44.Kh2 Kg6 45.c7 Nc7 46.Rc7 (worse 46.Bc7 Ra3+–) 46...Ra2 47.f4 (47.f4 gf4 48.Bf4+–) 1–0. Vendelo – Donoghue, internet, 2020.

4.Ne2 Nf6 5.g3 e6 6.d4 (better is 6.a3!?=+) 6...Bb4–+ 7.c3 Be7 8.Qa4 Nc6 9.Nf4 0–0 10.Bb5 Qc7 11.Bc6 bc6 12.h3 c5 13.0–0 Ne4 14.f3 (14.Nh5–+) 14...Ng3 15.Re1 Nf5 16.Kh2 (16.Ne2–+) 16...Bd7 17.Qa6 Bd6 18.dc5 Bf4 19.Kg2 (19.Kh1–+) 19...Bc1 20.Rc1 Qg3 21.Kf1 Qf3 22.Ke1 Qg3 23.Ke2 Qe3 24.Kf1 Qc1 25.Ke2 Qe3 26.Kf1 Rab8 27.Qa7 Ng3 28.Kg2 Rb2 (29.Nd2 Rd2) 0–1. bad ass biker – Klaus Behrmann (2080), ChessWorld.net, 2003.

4.Nf3 Qb6 5.a3 Nf6 6.Bb2 (6.Be2 a5=) 6...a5 7.Be2 ab4 8.Bd4 Qe6 9.0–0 (9.ab4 Ra1 10.Ba1 Qg4=) 9...Nc6 10.ab4 Ra1 11.Ba1 Nb4 12.Na3 (12.c3 Nc6=+) 12...Nc6 (12...Qf5 13.Bb5 Bd7 14.Bd7 Qd7 15.Qe2=) 13.Nb5= Qf5 14.Nc7 (14.Re1 e5=+) 14...Kd8=+ 15.Nb5 Nd7 (15...e5 16.d4 e4 17.Ne5=+) 16.Nfd4 (16.Nbd4 Nd4 17.Nd4 Qf4=+) 16...Nd4 (16...Qf4 17.g3 Qh6 18.Nf5=+) 17.Bd4 (17.Nd4 Qf4=+) 17...e5 18.Bb2 d4 (18...Nb6 19.d4 e4 20.f3=+) 19.Qa1 (19.Na7 Nb6 20.Nc8 Qc8= (20...Kc8?? 21.Bg4 Qd7 22.Bd7 Nd7 23.Qf3+–)) 19...Qe4 (19...Bc5 20.Bd3 Qh5 21.Qa5 Ke7 22.f4=) 20.Re1 (20.Bd3 Qd5=) 20...Bc5 21.Ba3 Ba3 22.Qa3 Rf8 23.Nd6+= Qc6 24.Nc8 Qc8= 25.Qb3 Qc6 26.Bc4 Nc5 27.Qa3 b6 28.h3 f6 29.Rb1 Ke7 30.Qg3 g6 31.Qh4 h5 32.Re1 Ne6 33.Bb3 g5 34.Qg3 (34...Nf4 35.h4–/+; 34.Qh5? Qg2!? 35.Kg2 Nf4 36.Kf3 Nh5–+). Baer,Werner – Zmolil,Josef, TT–12 ETC, 2004.

4.Nf3 Nc6 5.b5 Nb4? (better is 5...Na5=) 6.a3+– Qa5 (6...Nc2 7.Qc2 e5 8.Bb2+– (< 8.Ne5 Qe7 9.d4 f6+/–)) 7.c3 e6 8.cb4 Bb4 9.Bb2 (9.ab4?! Qa1 10.Qc2 Qf6+/–) 9...Bf8 10.Bc3 Qd8 11.Bd3 Nf6 12.0–0 Bd6 13.Re1 0–0 14.Qc2 Qc7 15.Qa4 a6?! (15...Qe7+–) 16.Bf6 gf6 17.Qh4 (better is 17.Qg4!? Kh8 18.Qh3 f5+–) 17...f5 18.Ng5 h5 (18...f6 19.Ne6 Be6 20.Re6+–) 19.ba6 (< 19.Qh5 f6 20.Ne6 Be6 21.Re6 Qc1 22.Bf1 Rf7+–) 19...ba6 20.Qh5 Kg7 21.Qh7 Kf6 22.Qh6 Ke7 23.Nh7 Rd8 (23...Bb7 24.Bf5 Bc6 25.Be6 fe6 26.Qe6 Kd8 27.Nf8 Bf8 28.Nc3+–) 24.Qh4 Kd7 25.Nf6 Kc6 26.Rc1 Bc5 27.Nc3 Kb7 (27...Kd6 28.Na4 Bf2 29.Qf2+–) 28.Na4 Kb8 (28...Ka7 29.Nc5 Qd6+–) 29.Rab1 Bb7 30.Nc5 d4 31.Ba6 Ra7 32.Ncd7! Ka8 (32...Qd7 33.Nd7) 33.Rc7 Ba6 (33...Bf3 34.Nd5! Rc7 35.Nc7 Ka7 36.Qd4) 34.Nd5! Rd7 (34...ed5 35.Qd8) 35.Qh8 Rd8 36.Qd8 (36...Bc8 37.Qc8) 1–0. b4_player (2240) – ajny14 (1800), GameColony.com, 2003.

4.Nf3 e6 5.a3 a5 6.b5 Nf6 7.d4 Bd6 8.c4 b6 9.Be2 Nbd7 10.Nbd2 0–0 11.0–0 Bb7 12.Bb2 Ne4 13.Ne4 de4 14.Ne5 Ne5 15.de5 Bc5 16.Qd8 Rad8 17.Bc1 f6 18.ef6 gf6 (worse is 18...Rf6 19.Bg5+=) 19.Bh6 Rfe8 20.a4 e5 21.Rfd1 Rd4 22.g3 Bc8 23.Be3 Be6 24.Bd4 ed4 25.Bf1 d3 26.Bg2 Bc4 27.Re1 f5 28.Bf1 Kf7 29.Rab1 Rd8 0–1. fereidoonezzati – pierre (2100), internet, 2012.

4.Nf3 Nf6

5.a3 e6=.

5.a3 Bg4 6.Bb2 e6 7.Bb5 Nc6 8.h3 Bh5 9.g4 Bg6 10.Ne5 Qc7 11.h4 Bd6 12.Ng6 hg6 13.g5 Nh5 14.Qf3 0–0–0 15.Bc6 bc6 16.Nc3 e5 17.d3 f5 18.Ne2 Rhe8 19.Rh3 e4 20.de4 Re4 21.0–0–0 Nf4 (21...Rde8 22.Nd4=+) 22.Nf4= Bf4 23.Kb1 Be5 24.Be5 Qe5 25.Qd3 Kb7 26.b5 c5 27.Re3 Re3 28.fe3 Qe4 (28...Kb6 29.a4=) 29.Qc3 d4 (29...Qe7!?=) 30.Qc5+= Qe3 31.Qc6 Kb8 32.b6 (32.Qg6?! Qa3 33.Rd3 Qb4 34.Rb3 Qe1 35.Ka2 A) 35...Qh4?? 36.Qa6 (36.Qf5?! Qh2+=; 36.Qg7?! Qe4=) 36...Qh2 37.b6 Qc2 38.Rb2 Qb2 39.Kb2 ab6 40.Qb6 Kc8 41.Qc5 Kb7 42.Qf5+–; B) 35...Qe4=) 32...ab6?? (better is 32...Qe5+/–) 33.Qb6+– Kc8 34.Qc6 (34.Qg6?! Qe4 35.Qg7 Qh4+–) 34...Kb8 35.Ka2 (35...Qc1 36.Rc1 Rd5 37.Rb1 Rb5 38.Rb5 Ka7 39.Qb7; 35.Qg6?! Qe5 36.Qb6 Kc8 37.Qc6 Qc7 38.Qe6 Qd7 39.Qc4 Kb7+–) 1–0. market (2185) – Siegmar (1880), GameColony.com, 2002.

5.a3 Bg4 6.Bb2 e6 7.h3 Bh5 8.g4 Bg6 9.Bb5 Nbd7? (better is 9...Nc6=) 10.g5+– Ne4 11.Ne5 (11...Nf2 12.Bd7 Qd7 13.Kf2+–) 1–0. market (2130) – Lefevre (2140), GameColony.com, 2002.

5.Bb2 e6 6.a3 a5 7.b5 Be7 8.Be2 0–0 9.0–0 Nbd7 10.Re1 Bd6 11.d4 Nb6 12.Bd3 Bd7 13.Ne5 Qc7 14.a4 Rfc8 (14...Nc4 15.Bc4 dc4 16.Ba3=) 15.Nd2 Be8 (15...Bb4 16.Qe2=) 16.c4 (16.Ba3 Ba3 17.Ra3 Nbd7+=) 16...dc4= 17.Ndc4 Nc4 18.Bc4 Qd8 19.Rc1 Rc7 20.Qb3 (20.d5 Nd5 21.Bd5 ed5 22.Qd5 Rc1 23.Rc1 Qe7+=) 20...Bb4 (20...Rac8 21.b6 Re7 22.Bc3+=) 21.Re2 (21.Bc3 Bc3 22.Qc3 Rac8+=) 21...Rac8 22.Rec2 (22.b6 Re7=) 22...Nd5= 23.h3 (23.Bd5 Rc2 24.Rc2 Rc2 25.Qc2 Qd5+=) 23...Nf4 (23...Qd6 24.Nd3=) 24.Qf3 Nd5 25.Qe4 Qg5 26.Qd3 Bd6 27.Bd5 ed5 28.Rc7 Rc7 (28...Bc7 29.b6 Qc1 30.Bc1 Be5 31.Bg5+–) 29.Rc7 Bc7 30.Qc3 Qd8 31.Bc1 Bd6 32.Qb3 Bb8 33.Nd3 f6 34.b6 Bc6 35.Bd2 Qe8 (35...Qe7 36.Ba5 Qe4 37.Qc3+=) 36.Nc5+= Bd6 ½–½. Rosner,Dirk – Coltharp,Cameron, corr SOK–98–E003A, 1998.

5.Bb2 e6 6.a3 Bd6 7.Bd3 Nbd7 8.Qe2 0–0 9.0–0 e5 (9...a5 10.ba5 Qa5 11.Re1=) 10.Ne5 Re8 11.f4 Qb6 (11...Qc7 12.Qf2 Ne5 13.Be5 Be5 14.fe5 Re5 15.Nc3=) 12.Kh1 Ne5 13.fe5 d4 14.Rf6 (worse is 14.ef6 Re2 15.Be2 Be5–/+) 14...gf6 15.Qh5 fe5 (15...Be5 16.Qh7 Kf8 17.c3=) 16.Qh7 Kf8 17.a4 (17.c3!?=) 17...Bb4–/+ 18.Qh8 Ke7 19.Qe5 Kd8 20.Qd5 (20.Qd4?? Qd4 21.Bd4 Re1 22.Bg1 Bc5–+) 20...Qd6 21.Qd6 Bd6 22.Na3 Rh8 23.h3 Rh4 24.Nb5 Bc5 25.Kh2 a6 26.Kg3 ab5 27.Kh4 ba4 28.Ba3 Be7 29.Kg3 Ra5 30.Bb2 Bf6 31.Kf4 Kc7 32.g4= Be6 33.Kf3 Bd5 34.Kf4 Bg2 35.Kg3 Bc6 36.Ba3 Be5 37.Kf2 b5 38.h4 Bd6 39.c3 Ba3 40.Ra3 Ra8 41.h5 Kd6 42.h6 Ke5 43.h7 Kf4 44.Ra1 Rh8 45.Rf1 Bf3 46.g5 a3 47.Ra1 Be4 48.Be4 Ke4 49.Ra3 Rh7 50.Rb3 ½–½. Schulz,Hans_Juergen – Sternik,Ryszard, TT–19.49 ETC, 2005.

5.Bb2 e6 6.a3 Bd6 7.Be2=.

5.Bb2 e6 6.a3 Nbd7 7.d4 Bd6 8.Bd3 0–0 9.0–0 Qc7 10.Re1 a6 11.Nbd2 b5 12.Nb3 Nb6 13.Nc5 Nc4 14.Bc3 Rd8 15.a4 Bd7 16.Ne5 Be8 17.Qf3 h6 18.a5 Rdc8 19.Bc4+= dc4 20.Bd2 Bc6= 21.Qh3 Nd5 22.Bh6?? Re8?? (better is 22...gh6 23.Nc6 Qc6 24.Qh6 Bf4–+ (24...Nb4 25.Re4 Bh2 26.Qh2 Nc2 27.Qg3 Kf8 28.Rd1–/+)). Baer,Werner – Zulauff,Harri, TT–18 ETC, 2005.

5.Bb2 e6 6.c4 Bb4–/+ 7.cd5 0–0 8.de6 Be6 9.Be2 Nc6 10.Nc3 Rc8 ½–½. Netusil,Miroslav (2335) – Svatos,Jan (2275), CZE–chT1W, 2006. (=1.e4 c6 2.b4 d5 3.ed5 cd5 4.Nf3 Nf6)

5.b5 Bf5 6.Be2 e6 7.a3 Bd6=+ 8.d4 Nbd7 9.Bg5 Qc7 Attacking the backward pawn on c2 10.Bd3 Bd3 11.cd3 Qa5–+ 12.Qd2 Qb5 13.Nc3 Qa5 14.Rb1 Rc8 15.Rc1 Ba3 16.Qa2 Rc3 17.Rc3 Qc3 (18.Ke2 0–0–+) 0–1. Kingeorge (2030) – hertford (2140), ChessWorld.net, 2003.

5.Bb5 Bd7 6.Be2=.

5.d4 e6 6.a3 Bd6=.

5.Be2 Bf5 6.0–0 Nbd7 7.Nh4 Bg6 8.a3 e5 9.d4 Qc7 10.Ng6 hg6 11.Re1 0–0–0 12.h3 e4 13.Bd2 Nb6 14.c3 Bd6 15.a4 Qd7 16.Bb5 Qf5 17.Re3 Bf4 18.Re1 Rh3?? 19.Bf4 Rdh8 (20.gh3 Qf4+–). Rosner,Dirk – Vehre,John, corr EM–M–GT–015 ICCF Email, 1998.

4.Nf3 Bg4

5.Bb2 Nd7 6.Be2 Ngf6 7.0–0 e6 8.a3 a5 9.h3 Bf3=+ 10.Bf3 ab4 11.Re1 Bd6 12.ab4 Bb4 13.Ra8=+ Qa8 14.Qe2 0–0 15.Qb5 Qa5 16.Qa5 Ba5 17.Nc3 Rc8 18.Ra1 Bb6 19.Ra3 Ne8 20.Rb3 Nd6 21.Bg4 d4 22.Nd5 Bd8 23.Nb4 Nc5 24.Ra3 Nc4 25.Ra2 Nb2 26.Rb2 Bg5 27.d3 Ra8 28.Bf3 Kf8 29.g3 Ke7 30.Kg2 Kd6 31.h4 Bc1 32.Ra2 Ra3 33.Kf1 f5 34.Bg2 e5 35.Ra3 Ba3 36.Nd5 b5 37.Ke1 e4 38.de4 fe4 39.Nf4 Ke5 (40.f3 Bc1–+; 39...Bb2 40.Ke2–+) 0–1. Mchess5 – Rebel8, 60/60 Aachen, 1996.

5.Bb2 Nf6 6.h3 Bd7 7.a3=.

5.Bb2 Nf6 6.h3 Bf3 7.Bb5 Nbd7 8.Qf3 = (< 8.gf3 a6 9.Bd7 Qd7–/+).

5.Bb5 Nc6 6.0–0 e6 7.Bb2 Qb6 8.Na3 Nf6 9.Bf6 gf6=+ 10.c3 a5 11.ba5 Ra5 12.Bc6 bc6 13.Nc2= Rg8 14.d4 Bd6 15.Ne3 Bh5 16.Kh1 Ra3–/+ 17.c4 Qa6 18.c5 Bc7 19.Qc2 Bg6 20.Qb2=+ Be4 21.Nh4 Kd7 22.f3 Rb8 23.Qf2 Bd3 24.Rfd1 Qa4 25.Ng4 Ke7 26.Re1 h5 27.Ne3 Kf8 28.Nd1 Qb4 29.f4 Be4 30.Rf1 f5 31.Kg1 Bd8 32.Nf3 Bf3 33.gf3 Bf6 34.Kg2 Bd4 35.Qh4 Ba1 36.Kh1 Qc4 37.Rg1 Bd4 38.Re1 Ra2 39.Qh5 Qc2 40.Qh6 Ke7 41.Re6 fe6 42.Qh4 Kf8 43.Qh5 Qd1# 0–1. Polo,Raphael – Luzuriaga,Norberto Horacio, corr or01–015 E–mail, 2002.

5.h3 Bd7=.

5.Bb2 e6

6.Bb5 Nc6 7.0–0 Nf6 8.a3 Bd6 9.d3 0–0 10.Nbd2 a5 11.c3 Qb6 12.Bc6 bc6 13.Qc2 Rfb8 14.Rfb1 Bf5 15.Nb3 Qa6 16.Na5? Bd3 17.Qd2 Bb1–+ 18.Rb1 Bc7 19.Nb3 Qc4 20.Nbd4 c5 21.Nc6 cb4 22.Nb8 ba3 23.Ba3 Ra3 24.Nd4 Ra2 25.Qe1 Ne4 26.Ne6 fe6 0–1. Trkn – alexander2000, itsyourturn.com, 2000.

6.h3 Bf3 7.gf3 Bb4?? 8.Bg7 Qg5 9.Bh8 +–.

6.h3 Bf3 7.gf3 Nf6 =+.

6.h3 Bf3 7.Qf3 Nf6 8.a3=.

6.h3 Bh5 7.a3 Nf6 8.g4 Bg6 9.Bb5 Nc6 10.h4 Qb6 11.Bc6 bc6 12.h5 Be4 13.Rh4 h6 14.Bf6= gf6 15.d3 Bf3 16.Qf3 a5 17.b5 Qb5 18.d4 Rg8 19.Nc3 Qb2 20.Ra2 Qc1 21.Nd1 f5 22.Qe3? Qe3–+ 23.Ne3 Be7 24.Rh3 f4 25.Nd1 Rg4 26.Nb2 f3 27.c3 Re4 28.Kd1 c5 29.dc5 Bc5 30.Rf3 Rh4 31.Nd3 Rh1 32.Kc2 Bd6 33.Rb2 Ba3 34.Rb7 Be7 35.Ne5 f5 36.Rb6 Rh5 37.Re6 Kf8 38.Rd3 Ra7 39.Rd5 Rh2 40.Nc6 Rf2 41.Kd3 Rc7 42.Ne7 Re7 43.Rh6 Rf3 44.Kd2 Rf2 45.Kd3= Rf3 (45...a4!?=+) ½–½. Schulz,Hans_Juergen – Bonetti,Shane, TT–11 ETC, 2003.

6.a3 Nf6

7.h3 Bh5 8.g4 Bg6 9.Bb5 Nc6=+.

7.h3 Bh5 8.g4 Bg6 9.Bb5 Nbd7?? 10.g5+– Ne4 11.Ne5 Nf2 12.Bd7 Qd7 13.Qe2 Nd3 14.Nd3+–.

7.h3 Bh5 8.g4 Bg6 9.Bb5 Nbd7?? 10.g5+– Ne4 11.Ne5 Qg5? 12.Nd7 (12.Bd7!? Kd8 13.Qf3 Bd6 14.Ng6 fg6+–) 12...Qg2 (12...0–0–0 13.Ne5 d4 14.Ng6 hg6 15.Qe2+/–) 13.Rf1 Qh3 14.Nb6 Kd8 15.Na8 Bd6 16.Bg7 Rg8 17.d3 Nf2 18.Bf6 Kc8 19.Qe2 Bh5–+ 20.Qf2 Bg3 21.Kd2 Bf2 22.Rf2 Rg1 23.Kc3 Qe3 24.Bd4 Qe1 25.Kb3 e5 26.Nd2 Qf2 27.Rg1 Qd4 28.Rg8 1–0. kamret (2225) – Fetzer (1835), GameColony.com, 2003.

7.h3 Bh5 8.g4 Bg6 9.Ne5 Bd6 10.g5 Ne4 11.d3 Qg5 12.Nf3 Nf2 13.Kf2 Qg3 14.Ke2 Qf3 15.Kf3 Bh5 16.Kf2 Bd1–/+.

7.h3 Bh5 8.g4 Bg6 9.Ne5 Bd6 10.g5 Ne4 11.d3 Qg5 12.Nf3 Nf2 13.Ng5 Nd1 14.Kd1+/–.

7.h3 Bh5 8.g4 Bg6 9.Ne5 Bd6 10.g5 Ne4 11.d3 Ng5 12.Ng6 hg6 13.Bg7 Rh4=+.

7.h3 Bh5 8.g4 Bg6 9.Ne5 Bd6 10.Ng6 hg6 11.h4 (11.Nc3 Nc6=) 11...g5 (11...Nc6 12.g5 Nh5 13.Nc3=) 12.h5= Qc7 (12...Nc6 13.Bb5=) 13.Bf6 gf6 14.Nc3 Be5 (14...a6 15.Rh3=) 15.Nb5 Qb6 16.d4 Bf4 17.Nc3 a5 18.Na4 Qc7 19.b5 Ke7 20.Rb1+= Nd7 21.b6 Qd6 22.Qd3 Rac8 23.Rb5 Rc4= 24.Ra5 Rhc8 25.Ra7=+ Rc2 26.Rb7 Rd2 27.Qb1 Rd4 28.Bb5= Qe5 29.Kf1 Rc1 30.Qc1 Bc1 31.Rd7 Kf8 32.Nc5 Rd1 33.Kg2 Rh1 34.Kh1 Qd4?? 35.h6=+ Kg8?? 36.Bd3+– f5 37.b7 Bf4 38.gf5 Qf2?? 39.Rd8 Kh7 40.f6 Kh6 41.Rh8# 1–0. kamret (2190) – elo2102 (1955), GameColony.com, 2003.

7.h3 Bh5 8.g4 Bg6 9.Ne5 Nbd7 10.Ng6 hg6 11.Nc3=.

3.ed5 Qd5

4.Nc3 Qd6 5.a3 a5 6.b5 Bf5 7.Nf3 Nf6 8.Rb1 Nd5 9.bc6 bc6 10.Nd5 Qd5 11.Be2 e6 12.0–0 Be7 13.d4 Nd7 14.c4 Qe4 15.Rb7 Rd8 16.Ra7 0–0 17.Re1 Bf6 18.Bf1 Qg4 19.Ra5 c5 20.Be3 (20.dc5 Bc3 21.Bd2 Ba5 22.Ba5 Ra8+=) 20...Qg6 21.Qa1 cd4 22.Bd4 Be4 23.Bf6 Nf6 24.Ne5 Qh6 25.Qc3 Rd2 26.Qe3 Qe3 27.Re3 Bf5 28.Ra7 Rc2 29.f3 g5 30.Rb3 Bg6 31.Rbb7 Rc1 32.Kf2 Rc2 33.Ke3 Rc3 34.Kd4 Rc2 35.Ng6 hg6 36.Ke5 Nh5 37.Rb1+– Nf4 38.g3 Nh5 39.g4 Nf4 40.Kf6 Rh2 +–. b4_player (2260) – maverick0212 (2245), GameColony.com, 2003.

4.Nc3 Qd6 5.Rb1 Nf6 6.d4 b5 7.Nf3 Na6 8.a3 Nd7 9.Be2 e5 10.0–0 ed4 11.Nd4 Ne5 12.f4 Nc4 13.Bc4 bc4 14.Be3 Be7 15.Ne4 Qd5 16.Nc3 Qd6 17.Ne4 Qd5 18.Bf2 Qe4 19.Re1 Qd5 20.Qe2 Qd6?? 21.Nc6+/– Be6 22.Ne7 Qe7 23.f5 0–0 24.fe6 Rac8 25.Bd4 Rfd8 26.Qe3 fe6 27.Ba7 e5 28.Bd4! Rd5 29.Be5 Rcd8 30.Qb6 Ra8 31.Qc6 Qa7 32.Kh1 Rad8 33.a4 R5d7? 34.Qc4 Kh8 35.a5 Rd2 36.b5 Qf2 37.Qg4 Qa7 38.ba6 Qe7 39.Bc3 Qd7 40.Qg3 Rc2 41.Rb7 Rd2 42.Bg7 Kg8 43.Bd4 Kf8 44.Rd7 Rd7 45.Qf4 Kg8 46.Re8# 1–0. Bestia02c – Mint161, computer chess game, 2000.

4.Nc3 Qd6 5.Rb1 Nf6 6.d4 Nbd7 7.Nf3 e5 8.Qe2 Ng4 9.h3 Nh6 10.de5 Qe6 11.Qe4 a5 12.Bc4 Qf5 13.Bh6 Qe4 14.Ne4 gh6 15.ba5 Ra5 16.Nd6 Bd6 17.ed6 0–0 18.0–0 b5 19.Bb3 c5 20.Bd5 Nf6 21.Rfd1 Bf5 22.Rb2 c4 23.Nd4 c3 24.Rb3 Bg6 25.Bf3 Ra2 26.Rc3 Rd8 27.Nc6 Re8 28.Nd4 b4?? 29.Rc4+– Rf8 30.Rb4 Ra6 31.Nc6 Bc2 32.Rc1 Ba4 33.Ne7 Kh8 34.Nf5 Bd7 35.Bb7 Ra5 36.Nh6 Rb8 37.Rcb1 Be6 38.f3 Rh5 39.Ng4 Ne8 40.Rd4 Rd8 41.Rbd1 Bd7 42.f4 Rb5 43.Ne5 Be6 44.Bc6 Rb2 45.Be8 Re8 46.d7 Rd8 47.f5! Bb3 48.Rc1 Ba2 49.Rc8 Rb8 50.Rb8 Rb8 51.f6 Rd8 52.Nc6 Rd7 53.Rd7 h5 54.Rd8 Kh7 55.Ne5 h4 56.Kf2 Be6 57.g4! hg3 58.Kg3 Bb3 59.h4 Be6 60.Rf8 Bb3 61.Kf4 Ba2 62.Kg5 Bd5 63.h5 Be4 64.Nf7 Bd5 65.Rh8# 1–0. Bestia02c – Mint161, computer chess game, 2000.

3.e5 a5

4.b5 Qb6 5.Nc3 Bf5 6.Rb1 d4? (Better is 6...Qc5 7.bc6 bc6+=) 7.bc6+– Qc5 (7...Qc6?? 8.Bb5 dc3 9.Bc6 Nc6 10.Rb7 Ne5 11.Rb5+– (11.dc3?! Be4 12.Rb5 Bg2 13.Re5 Bh1+/–)) 8.cb7 Ra7 9.Rb5 Qc6 10.Rb3 Qg6 11.Bb5 Kd8 12.Qf3 (12...e6 13.Qf4+–) 1–0. Taulien,Hans_Juergen – Schilling,Hans, remoteschach.de, 2002.

4.b5 Qd7 5.a4 Qf5 6.d4 Qe4 7.Be3 Bf5 8.c3 f6 9.Nf3 e6 10.Nbd2 Qc2 11.Qc2 Bc2 12.Be2 cb5 13.ab5 a4+= 14.0–0 a3 15.c4 dc4 16.Bc4 White fights for the Initiative. 16...Kd7 17.d5+/– ed5 18.Bd5 Bd3 19.Rfc1 Ra5 20.Bb7?? Rb5+/– 21.Bc8 Kd8 22.ef6 Nf6 23.Ng5 Ke7? 24.Ra3+– Bf5 25.Bc5 Rc5 26.Rc5 Bc8 27.Rc8 h6 28.Ra7 Nbd7 29.Nge4 Ke6 30.Nf6 Nf6 31.Raa8 Kf7 32.Nc4 Ng4 33.h3 Nf2 34.Rf8! Rf8 35.Rf8 A double attack 35...Kf8 36.Kf2 (36...Ke7 37.Ke3+–) 1–0. Labahn,Wolfgang – Zugzwang 5.20, Paderborn, 1990.

3.e5 Qb6

4.a3 a5 5.c3 ab4 6.cb4 e6 7.d4? Bb4!–/+ 8.Bd2? Qd4–+ 9.Ra2 Qe5 10.Be2 Bd2 11.Rd2 Nf6 12.Nf3 Qc7 13.0–0 0–0 14.Rd4 Ne4 15.Bd3 c5 16.Ra4 Ra4 17.Qa4 f5 18.Qd1 Nc6 19.a4 Ne5 20.Na3 Nd3 21.Qd3 Bd7 22.Nb5 Qa5 23.Ra1 Ra8 24.g3 Bb5 25.Qb3 Qc3 26.Qc3 Nc3 27.Re1 Ne2 28.Re2 Be2 29.Kg2 Bf3 30.Kf3 Ra4 (31.Ke3 b5–+) 0–1. danelson (1725) – marekdrob, net–chess.com, 2006.

4.a3 Qd4 5.Bb2 Qb2 6.Nc3 –/+.

4.Ba3 Qd4–/+ 5.Nc3 Qe5 6.Qe2 Qe2 7.Be2 e5 8.0–0–0? a5–+ 9.Bb2 ab4 10.Nb1 f6 11.Nf3 Ra2 12.d4 e4 13.Ng1 Nd7 14.Bg4 Ne7 15.Bd7 Kd7 16.Ne2 Nf5 17.c3 b6 18.cb4 Bb4 19.g4 Nd6 20.Nbc3 Ra7 21.Rhg1 Nc4 22.Kc2 g5 23.Ra1 Ra1 24.Ra1 h5 25.Ra7 Ke6 26.Na4 hg4 27.Ra8 Kd7 28.Ra7 Kd8 29.Kb3 Bd6 30.Ng3 Rh2 31.Nf5 Bf5 32.Rg7 e3 33.fe3 Bc2 34.Kc3 Ne3 35.Nb6 Nd1# 0–1. psywar – pierre, ChessHere.com, 2006.

4.b5 Qd4 5.Nc3 Qe5 6.Qe2 Qe2 7.Be2 e5 8.Nf3 Bd6 9.Bb2 Nf6 10.a4 Bf5 11.d3 0–0 12.0–0 Nbd7 13.Nh4 Bg6 14.Ng6 fg6 15.Bf3 d4 16.Ne4 Ne4 17.Be4 Nf6 18.bc6 Ne4 19.de4 bc6 20.Rfd1 Rab8 21.Rab1 Rb6 22.Rd3?? Rfb8 0–1. gtate (1930) – ciclamino (2155), net–chess.com, 2003.

4.b5 Qd4 5.Nc3 Qe5 6.Be2 d4 7.Nf3 Qf4 8.Nb1 cb5 9.Bb5 Bd7 10.d3 Qd6 11.Ba3?? Qe6–+ 12.Kd2 Bb5 13.Re1 Qh6 14.Ke2 Bd7 15.h3 Nc6 16.c3 Bf5 17.cd4 Rd8 18.Nc3 Nd4 (19.Nd4 Rd4–+) 0–1. jpettit (2240) – jjones (2535), net–chess.com, 2005.

4.c3 g6 5.d4 Bg7 6.Bd3 Nh6 7.Ne2 0–0 8.0–0 Nf5 9.Nd2 f6 10.Nf3 fe5 11.Ne5 Nd7 12.Bf5 Rf5 13.Ng3 Re5 14.de5 Ne5 15.Be3 Qc7 16.Bd4 Ng4 17.Bg7 Kg7 18.Qe2 Nh6 19.Rfe1 e6 20.c4 Qf7 21.cd5 ed5 22.Qe5 Kg8 23.Qg5 Qf8 24.Re7 Ng4 25.Rae1 Qf2 26.Kh1 Bd7 27.h3 Qg3? 28.hg4+– (28...Qg4 29.Qf6 Qh5 30.Kg1+–) 1–0. Labahn,Wolfgang (2220) – Bekker Jensen,Anne (2070), Wichern op 5th, 1999.

4.c3 Nh6 5.d4 a5 6.Qa4 Bf5 7.Bh6 gh6 8.Nd2 Nd7 9.Nb3 Qa7 10.ba5 e6=+ 11.Nd2 Qa5 12.Qa5 Ra5 13.Nb3 Ra4–/+ 14.Ne2 Ba3 15.Rd1 Be7 16.Rd2=+ 0–0 17.Rb2 Rfa8–/+ 18.Nec1 Ba3 19.Rd2 Be7 20.Rb2 Kg7 21.g4 Bg4?? 22.Rg1+/– f5 23.f3+– Ba3 (24.Rf2 h5+–) 1–0. Robert Edward (1830) – Garfield85, internet, 2006.

4.c3 a5

5.Qa4 Bf5 6.d4 Nd7 7.Nf3 e6 8.Be2 Qd8 9.ba5 Ra5 10.Qb3 b5 11.0–0 f6 12.Bf4 Be7 13.Re1 Qb6 14.Nbd2 c5 15.Qd1 c4 16.Nh4 fe5 17.Nf5 ef5 18.de5 Bc5 19.Rf1 Ne7 20.a4 0–0 21.Nf3 Rfa8 22.Bg5 Qb7 23.Rb1 Ng6 24.Rb5 Rb5 25.ab5 Nge5 26.Ne5 Ne5 27.Qd2 ½–½. Wochnik – Pommerel, corr 3GMM½–01 1997.

5.Qa4 Bf5 6.d4 Nd7 7.Nf3 e6 8.Be2 f6 9.ef6 gf6 10.Nbd2 Bd6 11.Nh4 1–0. Zimmermann – Pleschke, Tigerschachclub, 2002.

5.ba5 Qa5 6.Nf3 c5 7.a4 Bd7 8.Bb2 c4 9.d3 Ba4 10.Qd2 b5 11.Be2 Nd7 12.Ba3 g6 13.dc4 dc4 14.0–0 Ra6 15.Bd1 Qc7 16.Ba4 ba4 17.Re1 Bg7 18.Bd6 Qc8 19.Bb4 Nb6 20.Na3 Qd7 21.Qf4 Qf5 22.Qd4 Qc8 23.Nb5 Qc6=+ 24.Rad1 Nd7 25.Nd6 ed6 26.ed6 Kf8 27.Re8!? Ke8 28.Qg7 a3 29.Qh8 Kf8 30.Ng5 (30...Qg2 31.Kg2+–) 1–0. Taulien,Hans_Juergen – Staats,Carsten, RSS7E–1 remoteschach.de, 2002.

5.ba5 Qa5 6.Nf3 c5 7.Be2 Nc6 8.d3=.

5.ba5 Qa5 6.Nf3 c5 7.Be2 e6 8.0–0+= Ne7 9.d4 Nbc6 10.Be3 Nf5 11.Bd3 cd4 12.cd4 Be7 13.Qb3 0–0 14.Nc3 Ne3 15.fe3 Nb4 Can a2 get defended? 16.Bb1 Qa3 17.Nb5?? Qb3–+ 18.ab3 Ra1 19.Bh7 Kh7 20.Ra1 Bd7 21.Nd6 Bd6 22.ed6 f6 (23.Ra7 Rb8–+) 0–1. Labahn,Wolfgang (2215) – Boehle,Lars (2345), Dortmund op–A, 1993.

5.ba5 Qa5 6.Nf3 Bf5 7.Nd4 Bb1 8.Rb1=.

5.ba5 Ra5 6.d4 Bf5 7.Nd2 e6 8.Nb3 Ra8 9.a4!?

5.ba5 Ra5 6.d4 Bf5 7.Nd2 e6 8.Nb3 Ra8 9.Bd3 Ne7 10.Ne2 Nd7 11.0–0 c5 12.Nc5 Nc5 13.dc5 Qc5 14.Be3 Qc7 15.Nd4 Bd3 16.Qd3 Nc6 17.Rfb1 Ne5 18.Qb5 Qd7 19.Qb7 Qb7 20.Rb7 Bd6 21.Nb5 Nc4 22.a4 0–0 23.Nd6 Nd6 24.Rd7 Nc4 25.Ba7 Rfc8 26.Rb1 Ne5 27.Rdb7 Nc6 28.Be3 Ra4–/+ 29.g3 h6 30.Rd7 Ne5–+ 31.Re7 Rac4 32.Rbb7 Rf8 33.Kg2 Nc6 34.Red7 Rc3 35.Bf4 e5 36.Bd2 Rd3 Black prepares d4 37.Bc1 d4 38.Rdc7 Nd8 39.Ra7 Ne6 40.Rc4 Rc3 41.Raa4 Rc8 42.Rc3 Rc3 43.Ra8 Kh7 44.Bb2 Rc2 45.Rb8 Kg6 46.Rb6 Kf5 47.Rb7 Ke4 48.Kf1 Nc5 49.Rc7 Rb2 50.Rc5 Kf3 51.Ke1 Re2 52.Kd1 Rf2 53.Re5 f6 54.Re7 Rh2 55.Rg7 Ke3 56.Rf7 Rh1 57.Kc2 d3 58.Kc3 Rc1 59.Kb2 d2 60.Re7 Kf3 (61.Rd7 d1Q 62.Rd1 Rd1–+) 0–1. Labahn,Wolfgang – Glettenberg,J, Paderborn, 1990.

5.ba5 Ra5 6.d4 Bf5 7.Nd2 e6 8.Nb3 Ra8 9.Nf3 c5 10.dc5 Bc5 11.Nc5 Qc5 12.Qb3 Be4 13.Nd4 Ne7 14.Nb5 Kf8 15.Ba3 Qb6 16.Be7 Ke7 17.Qb4 Kd7 18.Nd6 Qb4 19.cb4 Nc6 20.Bb5 Bd3 21.Bc6 bc6 22.a4 Bg6 23.Kd2 f6 24.f4 Ra7 25.Rhc1 Rha8 26.a5 Bh5 27.h4 Rb8 28.Ra4 Ra6 29.Kd3 Ke7 30.Kd4 h6 31.Rca1 Kd7 ½–½. Gyger,Werner – Markus,Roland, 7.CH CiF, 2000.

5.ba5 Ra5 6.d4 Bf5 7.Nd2 e6 8.Nb3 Ra8 9.Nf3 Ne7=.

4.c3 Bf5

5.d4 Nd7 6.Nf3 e6 7.Be2 f6 8.0–0 0–0–0 9.a4 a5 10.Be3 Nh6 11.Bh6 gh6 12.ef6 Nf6 13.ba5 Qa5 14.Ne5 Rg8 15.f4 Rg7 16.Qb3 Bd6 17.Bf3 h5 18.Nd2 h4 19.Kh1 h3 20.g3 h5 21.Ra2 h4 22.gh4 Rh8 23.c4 Rh4 24.Qe3 Rh8 25.c5 Bc7 26.Nb3 Qb4 27.Nd2 Rhg8 28.a5 Ba5 29.Nb3 Qc3–/+ 30.Qc3 Bc3 31.Re2 Kc7 32.Rc1 Ne4 33.Rf1 Ra8 34.Rc1 Bb4 35.Rg1 Rg1 36.Kg1 Nc3 37.Rf2 Ra3 38.Nc1 Nb5 (39.Na2 Ba5–+) 0–1. Woelfelschneider,Peter – Pleschke,Helmut, 3. B4 Thementurnier, 2000.

5.d4 Nd7 6.Nf3 e6 7.Nh4 Bb1 8.Rb1 c5 9.a3 +=.

5.d4 Nd7 6.Nf3 e6 7.Nh4 Be4 8.Nd2+= a5 9.ba5 Qa5 10.Qb3 h5 11.Ne4 de4 12.Bd2 Be7 13.g3 Qa3 14.Qb7+/– Bg5 15.Qb4 Bd2 16.Kd2 Qa7 17.f4 Rb8 18.Qc4 Rb2 19.Ke1 Qa3 20.Ng2?? Rg2–/+ 21.Bg2 Qb2 A double attack 22.Be4 Qa1 23.Ke2 Qb2 24.Kf3 Ne7 25.Rb1 Qh2?? 26.Bc6+= Do you see the mate threat? 26...0–0 27.Bd7 Nf5 Black prepares h4 28.Qd3 Qg3 29.Ke2 Qg2 30.Ke1 h4 31.Rb6 Ne7 32.Qf1 Qg3=+ 33.Kd2 h3 (34.Rb7 Nd5–/+; 33...Nd5!? 34.Rb3 Ra8=+) 0–1. Baer,Werner – Bonetti,Shane, TT–09 ETC, 2003.

5.d4 Nd7 6.Nf3 h6 7.Be2=.

5.d4 e6 6.Bd3 Bd3 7.Qd3.

5.d4 e6 6.Nf3=.

5.Nf3 a5=.

5.Nf3 Nd7 6.d4 e6 7.Be3 Ne7 8.a4 a5 9.b5 Rc8 10.Na3 Bg6 11.Nh4 Nf5 12.Nf5 Bf5 13.Be2 Be7 14.0–0 c5 15.c4 cd4 16.Bd4 Bc5 17.Bc5 Rc5 18.Qd4 0–0 19.Rfd1 Qc7 20.f4 Nb6 21.cd5 Rd5 22.Qe3 Rd1 23.Bd1 Nd5 24.Qd4 Rd8 25.Nc4 Nf4 26.Qf4 Qc5 27.Qe3 Qc4 28.Bb3 Qb4 29.Rd1 Rd1 30.Bd1 h6 31.h3 Qb1 32.Qd2 Qa1 33.Qe2 Qd4 34.Kh1 Be4 35.Bc2 Bc2 36.Qc2 Qa1 37.Kh2 Qe5 38.g3 Qd5 39.Qc7 Qd2 40.Kg1 Qd4 41.Kh1 b6 42.Kg2 g5 43.Qc2 Kg7 44.g4 Qe5 45.Qf2 Qe4 46.Kg1 Qa4 47.Qb6 Qd1 48.Kf2 a4 49.Qa5 Qc2 50.Ke3 Qb3 51.Kd2 Qb2 52.Kd3 a3 53.Qc3 Kf8 54.b6 Qb1 55.Kd2 a2 0–1. Zimmermann,Joerg (1700) – Wittal,Werner (1700), TSC, 2002.

5.Nf3 Nd7 6.d4 e6 7.Nh4 Be4 8.Nd2 a5 9.Ne4 de4 10.b5 c5 11.Be3 cd4 12.Bd4 Bc5 13.Qd2 Rd8 14.Rd1 Bd4 15.cd4 Ne5 16.Qe3 Ng6 17.Ng6 hg6 18.Qe4 Nf6 19.Qf4 Rh5 20.Be2 Rhd5 21.0–0 Rd4 22.Rd4 Rd4 23.Qc1 Rd7 24.Qc3 Rc7 25.Qb2 Rc5 26.a4 Qc7 27.Bf3 Rc4 28.Qb3 Rb4 29.Qa3 Nd7 30.g3 Rc4 31.Qa1 Kf8 32.Be2 Rc3 33.Rd1 Qc5 34.Kg2 Ke7 35.Rd2 Rc2 36.Rc2 Qc2 37.Bf3 b6 38.Qd4 e5 39.Qh4 Nf6 40.Bc6 Qd1 41.Qc4 Qd4 42.Qb3 Kf8 43.Qa3 Kg8 44.Qe7 Ng4 45.Qe8 Kh7 46.Qf7 Qa4 47.Bd5 Nf6 48.Qe6 Qg4 49.Qe5 a4 50.Bf3 Qc4 51.Qe3 Qb5–+ 52.Qe6 a3 53.Qh3 Nh5 54.Qe6 Qg5 (55.Qc4 Nf6–+) 0–1. Miraglia,Jorge – Pommerel,Wim, email 4AMM–F, 1998.

5.Nf3 g6 6.d4 Bg7 7.Nbd2 Nh6 8.Be2 0–0 9.Nb3 f6 10.0–0 fe5 11.Ne5 Nd7 12.f4 Nf7 13.Bf3 (13.Nd7 Bd7 14.Nc5 Bf5=) 13...Qc7 (Better is 13...Nfe5!? 14.fe5 Ne5–/+) 14.Nd3 Nf6 15.g4 Be6 16.Re1 Bc8 17.g5 Ne8 18.b5 Ned6 19.bc6 bc6 20.Qe2 Nf5 21.Ndc5 N7d6 22.Kh1 Kh8 23.Nd3 Nh4 24.Ne5 Bf5 25.Nd2 Nf3 26.Ndf3 Be4 27.Kg1 Rab8 28.Be3 Rb7 29.a4 a5 30.Nd2 Rb2 31.Qg4 Bf5 32.Qh4 Rfb8 33.c4 Bc2 34.Rec1 Nf5 35.Qf2 Be5 36.de5 Ne3 37.Qe3 Qb6 38.c5 Qb4 39.Nf3 Rb3 40.Qd2 Rf3 41.Rc2 Rf4 42.Qb4 Rbb4 43.e6 Rf5 44.Rf2 Rg5 45.Kh1 Rf5 46.Raf1 Re5 47.Rf8 Kg7 48.R1f7 Kh6 49.Re7 Ra4 50.Kg2 Kg5 51.Rh7 Re6 52.Kg3 Re3 53.Rf3 Rf3 54.Kf3 Rc4 55.h4 0–1. Binder,Klaus – Radeiski,Wolfgang, V0081 DESC, 2001.

3.e5 e6

4.a3 a5 5.b5 c5 6.Nc3 b6 7.Nf3 Bb7 8.Be2 (8.Qe2 Ne7=) 8...d4= 9.Na4 Nd7 10.Bb2 Qc7 11.0–0 Ne5 (better is 11...Ne7=) 12.Ne5+/– Qe5 13.Nb6 Ra7 (13...Rb8 14.Nc4 Qg5 15.Bf3+/–) 14.f4 Qc7 (14...Qd6 15.Nc4 Qd5 16.Rf2+–) 15.Nc4 Nf6?? (15...Qc8+–) 16.b6 Qc6 (16...Qb8 17.ba7 Qa7 18.c3+–) 17.Bf3 Qb5 18.ba7 Qc4 (18...Qa6+–) 19.Bb7 Bd6 20.a8Q (20.a8Q Ke7 21.Qh8+–) 1–0. pierre – tkye, internet, 2010. (=1.e4 c6 2.b4 d5 3.e5)

4.a3 c5=.

4.a3 Nd7 5.Nf3 f6 6.d4 fe5 7.de5 Ne7 (7...a5 8.b5=) 8.Bd3 Ng6 9.Bg6 hg6 10.Qd3 Nb6 (better is 10...Qe7!?+=) 11.Ng5+/– Bd7?? (better is 11...Rh6 12.Nf3 Rh8+/–) 12.Qg6 Ke7 13.Qf7# 1–0. pierre – sum, internet, 2010.

4.a3 g6 5.d4 Bg7 6.Bd3 Ne7 7.Nf3 0–0 8.0–0 b5 9.Bg5 Qd7 10.Nbd2 Na6 11.Nb3 Nf5 12.Qd2 Re8 13.c3 Bb7 14.Nh4 Nh4 15.Bh4 Nc7 16.f4 Rf8 17.Nc5 Qc8 18.Be7 Re8 19.Bd6 Bh6 20.g3 a5 21.ba5 Ra5 22.Qb2 Ba8 23.a4 Ra4 (Better is 23...Ra7+–) 24.Na4 ba4 (25.Ra4 Nb5+–) +–. Marshall,Ron – Richard,Andy, M–1617.1, 1998.

4.Ba3 Qb6 5.d4 Bb4=+ 6.c3 Ba3 7.Na3 Qb2 8.Nc2? Qc3–+ 9.Ke2 Ne7 10.Rc1 Qc4 11.Ke1 Qa2 12.Nf3 b5 13.Bd3 Qa5 14.Nd2 Nd7 15.h4 c5 16.g4?! c4 17.Ra1 Qb6 18.Be2 b4 19.Ne3 Qd4 20.Ra4 b3 21.Qb1 Qe5 22.h5 h6 23.Nd1 0–0 24.f3 Nc5 25.Ra5 Nd3 26.Kf1 Nf4 27.Ne4 Ne2 28.Ke2 Nc6 29.Rc5 Nd4 30.Kf2 Qf4 31.Qb2 Qf3 32.Kg1 Qd1 33.Kg2 Qg4 34.Ng3 Nf5 35.Rh3 Ng3 36.Rg3 Qe4 37.Kh2 e5 The mate threat is Qxg7 38.Rc7 Be6 39.Qg2 Qg2 40.Rg2 e4 41.Rc5 e3 42.Ra5 d4 43.Ra1 b2 44.Rag1 c3 45.Rc2 Bf5 46.Re2 c2 47.Reg2 b1Q 48.Rg7 Kh8 49.Rb1 0–1. IrishBouncer – Long_Knights, ChessWorld.net, 2005.

4.c3 a5 5.ba5 Qa5 6.d4 Ne7 7.Nf3 h5 (7...c5 8.Bd3=) 8.Bg5 (8.Ba3 b6=) 8...Nf5 9.Bd3 Qc7 (9...b6 10.0–0=) 10.Bf5 (10.0–0 b6+/–) 10...ef5 11.g3 (11.0–0 Be6+=) 11...Be6 12.0–0 Be7 13.Qd2 Nd7 14.Be7+– Ke7 15.Qe3 b5 16.Nbd2 g6 17.Ng5 Kf8 18.Ndf3 Kg7 19.Rfb1 Ra3 20.Rb3 Rha8 21.Ra3 Ra3 22.Ne6 fe6 23.Qg5 Nf8 24.Qf6 Kg8 25.Ng5 Qd7 26.f4 Ra7 27.a3+= Qe7 28.Qe7 Re7 29.a4 Ra7 30.a5+– Ra6 31.Kf2 Kg7 32.Ke3 Kg8 33.Ra3 Kg7 34.h3 Kg8 35.Kd3 Kg7 36.Ra2 Kg8 37.Kc2 Kg7 38.Kb3 Kg8 39.Kb4 Kg7 40.Kc5 Kg8 41.Kd6 Kg7 42.Kc7 Kg8 43.Kb7 1–0. Caissa – 300SPARTANS, Live Game Caissa's Web, 2004.

4.c3 c5 5.bc5 Bc5 6.Ba3 Ba3 7.Na3=.

4.c3 c5 5.bc5+= Bc5 6.d4 Bb6 (6...Be7 7.Qg4 Bf8 8.Nf3+= Nc6 9.Bd3 Bd7; 6...Bf8 7.Bd3 Nc6 8.Nf3 Bd7 9.0–0 Rc8) 7.Qg4 g6 8.Bd3 (8.Nf3 Nc6 9.Bd3 Qc7) 8...Ne7 (8...Ba5 9.Ne2+= Nc6; 8...Nc6 9.Nf3 Qc7) 9.Bg5+/– (9.Nf3 h5) 9...Nd7 (9...h6 10.Qh4+=) 10.Qh4 Ba5 11.Ne2 b6 (11...Nf8!?+/–) 12.Nd2+– Bb7 13.Nb3 Bc3? (better is 13...Rb8+–) 14.Nc3 f6 (14...a6+–) 15.ef6 Nf5 16.Bf5 ef5 (16...Kf7 17.Bd3 h6 18.Bh6 Qf6 19.Qf4+–) 17.f7! (17.f7 Kf7 18.Bd8 Rad8 19.0–0+–) 1–0. Woelfelschneider,Peter – Nagel, 1999.

4.c3 f6 5.d4 Nd7 6.Bd3 Ne7 7.ef6+/– Nf6 8.Nf3 Qc7 9.Ne5 Bd7 10.Bg5 Neg8 11.Qc2 Bd6 12.Bg6! Kf8 13.Nf7 hg6 14.Nh8 Ne4 15.Ng6 Kf7 16.Nh8 (16...Ke8 17.Nd2+–) 1–0. Krasny,Henryk Jan – Pietrzak,Wojciech, corr or01–002 E–mail, 2001.

4.d4 Bb4=+ 5.c3 Ba5 6.Nf3 Ne7 7.Be2 0–0 8.0–0 b5 9.Bd2 Na6 10.Be3 Nf5 11.Bd2 b4 12.Qa4 bc3 13.Nc3 Bc3 14.Bc3 Qc7? 15.Qa3?? c5? 16.dc5 Nc5?? 17.Bb4 Nd7 18.Bf8 Nf8 19.Rfc1 Qb6 20.Qa4 Bd7+/– 21.Qb3 Qb3 22.ab3+– a5 23.b4 a4+/– 24.Rd1 Rb8 25.Rdb1 d4? 26.h3 Bc6+/– 27.b5 Be4 28.Rb4 d3 29.Re4+– de2 30.Re2 Rb5 31.Ra4 Rb1 32.Kh2 h5 33.Rea2 Rb8 34.Nd4 Nd4 35.Rd4 g5 36.Rad2 Ng6 37.Rd8 Rd8 38.Rd8 Kg7 39.Rc8 Ne5 40.Rc5 f6 White gets the initiative 41.Rc7 Nf7 42.g3 e5 43.Kg2 f5 44.h4 Kf8 45.hg5+– Ng5 46.Rc4 e4 47.Rc5+– Nf3 48.Rf5 Kg7 49.Rf3 ef3 50.Kf3 Kg6 51.Kf4 Kf6 52.Kf3?? Kg5?? 53.Kg2 Kg4 54.f3 Kg5 55.Kh3 Kh6? 56.Kh4 Kg6 57.f4 Kh6 58.f5 (58...Kh7 59.Kh5+–) 1–0. nandy conure – xCalvin, ChessWorld.net, 2005.

3.e5 Bf5

4.Na3 e6 5.b5 (5.c3 a5 6.b5 d4=) 5...Qa5 6.Nf3?? (better is 6.Qf3=+) 6...Ba3–+ 7.Ba3 Qa3 8.bc6 Nc6 9.Bb5 Nge7 10.Ng5 (10.c3 Be4–+) 10...0–0 (10...Qb2 11.Bc6 Nc6 12.0–0 Ne5 13.d3–+) 11.0–0 (11.Bc6 Nc6 12.0–0 Ne5–+) 11...h6 (better is 11...Nd4 12.Bd7–+) 12.c3 hg5 13.Qh5 Ne5 14.Qg5 N5g6 15.Rab1 Bb1 16.Rb1 Qa2 17.Bd3 b6 18.h4 f6 19.h5 fg5 20.hg6 Rf6 21.f3 Ng6 22.Rf1 Qd2 23.Bb5 Nf4 24.Bc6 Qe3 25.Kh2 Rh6 (26.Kg3 Ne2 27.Kg4 Rh4#) 0–1. tupadre – csadler, net–chess.com, 2001.

4.Bb2 e6 5.a3 Ne7 6.Nf3 Nd7 7.h3 Ng6 8.d4 Be7 9.Bd3 Bd3 10.cd3 (10.Qd3 a5 11.Qb3 ab4 12.ab4 Ra1 13.Ba1 0–0=+) 10...0–0 11.0–0 Rc8 (11...f6 12.Bc3–/+) 12.Qb3 b6 13.Nbd2 c5 14.b5 cd4 15.Bd4 Nh4 16.Nh4 Bh4 17.Nf3 Re8 18.Qd1 (18.Qa4 Rc7+=) 18...Nf8 (18...Be7 19.Qa4=) 19.Nh4 (19.Qa4!? Rc7 20.Bb6 (< 20.Nh4 Qh4 21.Qb4 Ng6=+) 20...ab6 21.Nh4+=) 19...Qh4= 20.Qg4 Qg4 21.hg4 Ng6 22.g3 Rc2 23.Rfd1 Rec8 24.a4 Re2 (24...f6!? 25.Re1 fe5 26.Be5 Ne5 27.Re5 Rc1 28.Rc1 Rc1 29.Kg2 Kf7=+) 25.Rac1 Rec2 26.Rc2 Rc2 27.Rb1 (27.g5 Kf8=) 27...h6 (27...Rd2 28.Rb3=+) 28.Kg2 (28.Ra1 Rd2 29.Ra3 f6=+) 28...Ra2 (28...Rd2–/+) 29.Rc1?? (better is 29.Ra1 Rd2 30.Ra3=) 29...Ra4–+ 30.Rc8 Kh7 31.Be3 Ne5 32.g5 hg5 33.Bg5 Nd3 34.Rc7 Kg6 35.Be3 d4 36.Bd2 Ra2 37.Bf4 Nf2 38.Kf3 f6 39.Bd6 e5 40.Bf8 Kf5 41.Kg2 Kg4 42.Rg7 Kf5 43.Be7 Ne4 44.Kf3 Rf2 0–1. jimmyjf – boa, ChessWorld.net, 2004.

4.Bb2 e6 5.Nf3 Bb4 6.Be2 Ne7 7.0–0 0–0 8.c3 Ba5 9.d4 Nd7 10.Nbd2 c5 11.Nb3 c4 12.Na5 Qa5 13.a4 Bg4 (13...Rfc8 14.Nh4–/+) 14.h3 (14.Ba3 Rfe8 15.Qb1 Bf3 16.Bf3 Qa6=+) 14...Bh5 15.Ba3 Rfe8 16.Bb4 Qc7 17.a5 Nc6 (17...Bf3 18.Bf3 Qc6 19.Qd2=+) 18.Bd6 Qd8 19.Qa4 f6 20.Qb5 White prepares the advance a6 (20.a6 Bf3 21.Bf3 Nb6=+ (21...fe5?? 22.ab7 Rc8 23.bc8R Qc8 24.de5+–)) 20...Qc8 (20...fe5 21.Qb7 Bf3 22.Bf3–/+) 21.a6 b6 (better is 21...ba6 22.Ra6 Ndb8–/+) 22.Qb2? (22.Rfe1 Bf3 23.Bf3 fe5 24.de5 Rd8=+) 22...Na5 (22...Bf3!? 23.Bf3 fe5–+) 23.Qb5 (23.ef6 Nf6 (23...Qa6?! 24.fg7 Qc8 25.Ne5 Be2 26.Qe2=; 23...gf6?! 24.Qb5=+) 24.Ne5 Be2 25.Qe2 Ne4=+) 23...Nb8 24.ef6 gf6 25.Rfe1 Qa6 26.Qa6? Na6–/+ 27.Nh4 Be2–+ 28.Re2 Kf7 29.Rae1 Nb7 30.Bg3 Nd8 31.f4? Rg8 32.Kh2 Nb8–+ 33.f5 ef5 34.Nf5 Nbc6 35.Nh6 Kg7 36.Nf5 Kh8 37.Re8 Nf7 38.Ra8 Ra8 39.Re6 Nfd8?? 40.Re8# 1–0. gtate (1700) – sgbrito (1900), net–chess.com, 2002.

4.Bb2 e6 5.Nf3 Bb4 6.Be2 Ne7 7.0–0 0–0 8.d4 c5 9.c3 Ba5 10.dc5 Nbc6 (10...Nd7 11.Nbd2–/+) 11.Nbd2 (11.c4 Bb4=+) 11...Rc8 12.Nb3 Bc7 (12...Be4 13.c4–/+) 13.c4=+ dc4 14.Bc4 Bg4 15.h3? (better is 15.Re1!?=+) 15...Qd1–/+ 16.Rad1 Bf3 17.gf3 Be5 18.Be5 Ne5 19.Be2 (19.Bd3 Nd3 20.Rd3 Rfd8–+) 19...N7g6 (19...Nd5 20.Rfe1–+) 20.Kh2 (20.Rd4 Rfd8 21.Rfd1 Rd4 22.Rd4 b6 23.cb6 ab6–+) 20...Nf4 21.Rfe1 Ne2 (better is 21...Rfd8!? 22.Rd8 Rd8–+) 22.Re2–/+ Nf3?? (better is 22...Nc6–/+) 23.Kg3+= Ng5 24.h4 Rfd8 25.Rd8 Rd8 26.hg5 Rd5 27.Kg4 h6 28.gh6 gh6 29.f4 f6? 30.Rg2 Kf7 31.Rc2 Kg6 32.Nd2 Rd3+= 33.Nf3 h5 34.Kg3 h4 35.Kg2 Kh5+= 36.Rd2 Rc3 37.Nd4 e5 38.fe5 fe5 39.Nf5 Rc5 40.Nd6 b6 41.a4 Kg4 42.Re2=+ h3 43.Kh2 Rd5 44.Re4?? Kf3–+ 45.Kh3 Rd6 46.Re5 Rh6 (47.Rh5 Rh5#) 0–1. gtate (1700) – sgbrito (1900), net–chess.com, 2002.

4.Nc3 a5 5.b5 e6 6.Nf3 Bg4 7.Be2 Bf3 8.Bf3 Nd7 9.bc6 bc6 10.d4 Bb4 11.Bb2 c5 12.a3 Bc3 13.Bc3 cd4 14.Bd4 Ne7 (14...Rc8 15.Be2=) 15.c4+= 0–0 16.0–0 Qc7 17.cd5 ed5 18.Rc1 Qb8 19.Re1 Nf5? (better is 19...Re8+/–) 20.Bd5+– Re8 (20...Ra6 21.Qd3 Nd4 22.Qa6 Ne5+–) 21.e6 fe6 22.Re6 Kh8 23.Re8 Qe8 24.Ba8 Qa8 25.Bg7! Ng7 26.Qd7 Qe4 27.Rc8 Ne8 28.Re8 Qe8 29.Qe8 Kg7 30.Qe5 Kf7 31.a4 h6 32.Qa5 h5 33.Qd5 Kf6 34.a5 h4 35.a6 h3 36.a7 hg2 37.a8Q Ke7 38.Qad8 1–0. usingprogram (1665) – ravensdefense, kurnik, 2011.

4.Nc3 e6 5.Nf3 Bb4 6.a3 Bc5 (6...Bc3!? 7.dc3 Nd7–/+) 7.d4+= Be7 8.Bd3 Bd3 9.Qd3 c5 10.0–0 Nc6 11.dc5 Bc5 12.Rb1 b6 13.Na4 Be7 14.c4 Nh6 (better is 14...Rc8–/+) 15.Bh6+= gh6 16.Rfd1 0–0 17.cd5 Qd5? (better is 17...ed5 18.Nc3 d4+/–) 18.Qc2+– (18.Qd5?! ed5 19.Nc3 Rfd8=) 18...Qa5 (18...Ne5 19.Rd5 Nf3 20.gf3 ed5 21.Qc7+–) 19.Qc6 Ba3 20.Ra1 Bc5 (20...Rfc8 21.Qe4 Qb4 22.Nd4 Qa4 23.Qf3+–) 21.Rdb1 Rfd8 22.Qe4 Rd2 (22...Rab8+–) 23.Nc5 (23.Nc5 Rd5 24.Ra5 ba5 25.Nd7+–) 1–0. usingprogram – cheparin2, internet, 2011. (=1.e4 c6 2.b4 d5 3.e5)

4.Bd3 Bd3 5.cd3 e6 6.Qa4? Ne7 (better is 6...Qg5 7.Ne2 Qg2–+) 7.b5 (7.Nf3 Nd7–/+) 7...Ng6 (7...a6–/+) 8.bc6 (8.Nf3!?–/+) 8...Nc6–+ (8...bc6?! 9.Nf3=+) 9.Nc3 (better is 9.d4 Qg5 10.Kf1–+) 9...Nge5 10.Ke2 (10.Qb5 Qd7–+) 10...Be7 (10...Bc5 11.f4 Qh4 12.fe5 Qf2 13.Kd1 Qg2 14.Qb5–+) 11.Rb1 Rb8 (11...d4 12.Ne4 Rb8 13.Bb2–+) 12.Nf3 (12.d4 Nc4–+) 12...Nf3 13.gf3 (13...0–0 14.Bb2–+). bsjostedt – eduqueiroga, net–chess.com, 2006.

4.Bd3 Bd3–/+ 5.cd3 e6 6.Nc3 Bb4 7.Qg4 Bf8 8.Nf3 Ne7 (8...Nd7 9.0–0–/+) 9.Ba3 Nd7 10.0–0 c5 11.Rab1 b6 12.Qa4 (12.d4 Nc6–/+) 12...Ng6 (better is 12...d4!? 13.Ne2 Ng6–+) 13.d4+= Qc7 (13...cd4 14.Bf8 Rf8 15.Nb5+=) 14.dc5 Bc5 (14...bc5 15.d4 a6 16.dc5 Bc5 17.Nb5=) 15.d4 Ba3 (15...Be7 16.Be7 Qc3 17.Rfc1+=) 16.Qa3 Ne7? (better is 16...Qd8 17.Nb5 a6 18.Nd6 Kf8+=) 17.Nb5+– Qd8 (17...Qb8 18.Rbc1 a6 19.Nd6 Kf8 20.Ng5+–) 18.Nd6 (18.Na7? Nc8–+) 18...Kf8 19.Ng5 (19.Ng5 Ng6 20.Ngf7+–) 1–0. pierre – fink, internet, 2010. (=1.e4 c6 2.b4 d5 3.e5 Bf5)

4.Bd3 Bd3 5.cd3 e6 6.Qg4 Qb6 –/+.

4.f4 Qb6=+ 5.Ba3 (5.c3 a5 6.ba5 Ra5=+) 5...Nd7 (5...Qd4!? 6.Nc3 Qf4–/+) 6.Nf3=+ e6 7.Be2 (7.c3 Ne7=+) 7...Ne7 (7...Bb4!? 8.c3 Ba3 9.Na3 Ne7–/+) 8.d4=+ h5 9.Ng5 g6 (9...Ng6 A) 10.Bh5? Bb4 11.Bb4 Qb4 12.c3 Qb2 13.Bg6 Bg6–+ (13...Qa1?! 14.Bf7 Ke7 15.0–0=+); B) 10.Qd2–/+) 10.c4 (better 10.Nc3!?=) 10...dc4–/+ 11.Bc4 White gets strong initiative 11...Bg7 (11...Nd5!? 12.Bd5 Bb4 13.Bb4 Qb4 14.Nd2 cd5=+) 12.Nc3= White intends b5 12...a5 (12...Nd5!? 13.Bd5 cd5=) 13.b5+= 0–0?? (13...Rd8 14.Nge4 Be4 15.Ne4+=) 14.bc6 (better 14.Be7 Rfc8 15.Na4+–) 14...Qc6= 15.Be7 Qg2? (better 15...Qc4 16.Rc1 Rfc8=) 16.Qf3+– Qf3 17.Nf3 Rfc8 18.Nd2 Rc7? 19.Nb5+– Rcc8 (19...Rc6 20.Nd6 Nb6 21.Bb5+–) 20.a4 (20.Nd6 Rc7 21.Nf5 gf5+–) 20...b6 (20...Bh6 21.Nd6 Bf4 22.Nc8 Rc8+–) 21.0–0–0 (21.Nd6!? Rc7 22.Nf5 ef5+–) 21...Nb8? (better 21...Bd3 22.Nd6 Bc4 23.N2c4 Rc4 24.Nc4 Rc8+–) 22.Nd6 Rc7 (22...Nc6 23.Nc8 Rc8+–) 23.Nb5 (better 23.Nf5 gf5 24.Bd6+–) 23...Re7= 24.Rhg1 (24.d5 ed5 25.Bd5 Ra6=) 24...Rd7 25.Nf3 (25.Nd6!?=+) 25...Bg4–/+ 26.Rgf1 (26.Ng5 Bd1 27.Kd1 Nc6 28.Ne6 A) worse 28...fe6 29.Be6 Rf7 30.Nd6+– (30.Rg6?! Nd4 31.Bf7 Kf7 32.Rb6 Rd8 33.Nd6 Kg8=+); B) 28...Nd4 29.Nbd4 Rad8–/+) 26...Nc6 (26...Bh6 27.Nd6–+) 27.Rd3? (27.d5 Rad8 28.Nd6 ed5 29.Rd5 Bh6 30.Nf7 Rf7 (30...Bf4?! 31.Nd2 Rd5 32.Rf4=+) 31.Rd8 Nd8 32.Bf7 Nf7–+) 27...Nb4 (better 27...Rad8–+) 28.Rd2?? (28.Rc3!?–/+) 28...Rad8 (28...Rc8!? 29.Na3 Nd5 30.Kb2–+) 29.Ng5? (29.Be2 Nc6 30.Nd6 Bh6–+) 29...Nd5 (better 29...Rc8 30.Na3 Rdc7–+) 30.Rd3?? (better 30.Bd5 Rd5 31.Rc2–/+) 30...Nb4 (better 30...Rc8 31.Nd6 Rd6 32.ed6 Rc4 33.Kb2 Be2–+) 31.Rc3 (31.Rd2 Rc8 32.Na3 Rdc7–+) 31...Rc8 32.Rh1 Bf5 33.Rd1 Bh6 34.Nd6? (34.Kd2 Bc2 35.Ra1 Rc6=+) 34...Rc6 (34...Na2 35.Kd2 Nc3 36.Kc3–+) 35.Ngf7? (better 35.Kb2–/+) 35...Kg7?? (better 35...Bf4!? 36.Kb2 Rf7 37.Nf7 Kf7 38.h4–+) 36.Kb2?? (36.Nh6 Bd3 37.Rcd3 (37.Rdd3 Nd3 38.Rd3 Rdd6 39.ed6 Rc4 40.Kb2 Rc6+=) 37...Rdd6 38.ed6 Rc4 39.Kd2 Nd3 40.Kd3+–) 36...Rdc7?? (36...Rf7 37.Nf7 Kf7 38.Rf1–+) 37.Rdc1?? (better 37.Nh6 Kh6 38.Rdc1+–) 37...Bf4 38.Ne8 (38.Rf1 Bd2 39.Rg3 Rf7 40.Nf7 Kf7 41.Kb3–+) 38...Kf7 39.Nc7 Bc1 40.Kb3?? (40.Rc1 Rc7 41.Be6 Ke6 42.Rc7–+) 40...Rc7 41.Rc1 Nc6 (better 41...Bc2!? 42.Kc3 Na2 43.Kc2 Rc4 44.Kb3 Rc1 45.Ka2 Rc2 46.Kb3 Rh2 47.Kc4–+) 42.Rf1 (42.Kc3–+) 42...Nd4 43.Kc3 Nc2 (43...Nc2 44.Rc1 Ke7–+) 0–1. VulcanThor – WarlpiriMan, ChessWorld.net, 2020. (=1.e4 c6 2.b4 d5 3.e5 Bf5)

4.g4 Bg6 5.h4 h5 Black gets the initiative 6.g5 e6 7.a3 Ne7 8.f4 (8.Nf3 Nf5=+) 8...Qb6 9.d4 Nf5 10.c3 Nd7 (10...Ng3 11.Rh2–/+) 11.a4 (11.Rh2 a5 12.ba5 Qa5–/+) 11...a5 12.b5 (12.ba5 Qa5 13.Bd3 b5–/+) 12...c5 13.Nf3 cd4 14.Nd4 Bc5 15.Ba3?? (better 15.Nf5 Bf2 16.Ke2 Bf5 17.Bh3–+) 15...Bd4–+ (15...Nd4?! 16.Bc5 Nc2 17.Qc2 Nc5 18.Qd1–/+) 16.cd4 (16.Ra2 Bg1 17.Rh3 Rc8–+) 16...Qd4 (better 16...Ne3!? 17.Qd2 Nc2 18.Kd1 Na1 19.Qc3 Bb1 20.Qa1–+) 17.Qd4 Nd4 18.Kf2 Nc2 (better 18...Nb3 19.Ra2 Bb1–+) 19.Ra2 Na3 20.Na3 b6 (20...Nb6 21.Be2–+) 21.Bg2–/+ 0–0 22.Nc4? (better 22.Rd2–+) 22...dc4 23.Ba8 Ra8 24.Rd2 (24.Rc1 Bd3–+) 24...Nc5 25.Ke3 Na4 26.Rd6 (26.Rd4 Rc8 27.Rc1 Nb2–+) 26...Rc8 (26...c3!? 27.Rf1–+) 27.Rc6 Rd8 28.Rc4 Rd3 29.Kf2 Nc5 30.Re1 (30.Ra1 Ne4 31.Ke2 Rh3–+) 30...Rb3 31.Rd4 (31.Re3 Nd3 32.Kf3 Rb5 33.Rc3–+) 31...Nd3 32.Ke2 Ne1 33.Ke1 Rb5 34.Rd8 Kh7 35.Ra8 (35.Ke2 Rb2 36.Rd2 Bd3 37.Ke1 Rd2 38.Kd2 Kg6–+) 35...Rb4 36.Kd2 (36.Rb8 Re4 37.Kd2 Rf4 38.Rb6 Rh4–+) 36...Rf4 37.Rb8 Rh4 38.Rb6 Rg4 39.Rb5 a4 40.Ke3 Bc2 41.Rc5 Bb3 42.Ra5 (42.Kd3 Bc4! 43.Ke3 a3 44.g6 Kg6–+) 42...Kg6 43.Kd2 (43.Rc5 a3 44.Rc1 a2–+) 43...Kg5 44.Kc3 (44.Ra7 Kf5–+) 44...h4 45.Ra7 Kg6 46.Kb2 h3 47.Ka3 h2 (47...h2 48.Rd7 h1Q 49.Rd1 Qd1 50.Kb2 Qd4 51.Ka3 Qa1) 0–1. hamiltonharris (1860) – FLINTSTONEFRED (1800), ChessWorld.net, 2013. (=1.e4 c6 2.b4 d5 3.e5 Bf5)

4.h3 Nd7 5.d4 (5.Nf3 e6=+) 5...Qb6 (5...e6 6.c3–/+) 6.Ba3 (6.a3 a5=+) 6...g6 (6...e6!? 7.c3 Be7=+) 7.Nf3= Bg7 8.Ng5? (8.c4!?=) 8...f6 (8...Ne5 9.g4 Bc2 10.Qd2–+) 9.Nf3? (better is 9.g4!? Bc2 10.Qc2 fg5 11.Qc3–/+) 9...fe5–+ 10.c3 Be4 (10...0–0–0 11.Be2–+) 11.Be2? (11.Nbd2 ed4 12.cd4 Nh6–+) 11...Bf6 12.Nbd2–/+ ed4 13.Ne4 de4 14.Nd4 Bd4 15.cd4= Ngf6 16.0–0 a5 17.ba5 Ra5 18.Bc1 Rd5 19.Be3+/– c5 20.Qa4?? 0–0?? 21.Bc4+– Qb4?? 22.Bd5 Nd5 23.Qd7 Ne3 24.fe3 Rf1 25.Rf1 Qd2 26.Qe6 Kg7 27.Qe7 Kh6 28.Qe4 cd4 29.ed4 Qa2 30.Qe5 Qg8 31.Rf4 g5 32.Rf6 Kh5 33.Qf5 Qe8 34.Qg4# (34.Qh7#) 1–0. Abuloai – Mokolato, internet, 2006.

4.h3 e6 5.Ba3 –/+.

4.h3 e6 5.c3 a5 6.g4 (better is 6.b5!?=) 6...Be4–/+ 7.f3 Bb1 (7...ab4 8.fe4 Qh4 9.Ke2 de4 10.cb4 Bb4 11.Qc2+/–) 8.Rb1 ab4 9.cb4 (9.Qc2 Qa5–/+) 9...Ra2 (9...Qh4 10.Ke2 Nd7 11.Qe1–+) 10.Qb3–/+ Qh4 11.Ke2 (11.Kd1 Ra7–/+) 11...Ra8 12.f4 Na6 (12...h5 13.Nf3 Qd8 14.g5–/+) 13.Nf3 (13.d4 Qd8–/+) 13...Qd8 14.b5 Nc5 Black gets strong initiative 15.Qb2 Ne4 16.Rg1 (16.bc6 bc6 17.Qc2 Bc5–/+) 16...Bc5 17.d4 (17.bc6 bc6 (17...Bg1?! 18.cb7 Rb8 19.Qb5 Kf8 20.Ng1=+) 18.Rg2 Ne7–+) 17...Ba3 (better is 17...Ra2! 18.Qa2 Nc3 19.Ke3 Na2 20.dc5 Qe7–+) 18.Qb3–/+ Qa5 (18...Bc1 19.Rc1 Qb6 20.Ke1–/+) 19.Ba3?? (19.Ra1 Nc3 20.Kd3 Nb5 21.Kc2 Bc1 22.Ra5 Ra5 23.Qb4+– (23.Kc1 Ra3 24.Qb4 Rf3+/–)) 19...Nc3–+ (19...Qa3?! 20.Rb2–/+) 20.Kf2 (20.Kd3!? Nb1 21.Bb4–+) 20...Nb1 (20...Qa3?! 21.Qa3 Ra3 22.bc6 Nb1 23.Bb5 bc6 24.Bc6 Kd8 25.Rb1–/+) 21.Bb4 Qa2 22.Qa2 Ra2 23.Kg3 Rb2 24.Bd6 Nc3 25.bc6 Ne4 26.Kh4 h6 (better is 26...bc6 27.Bd3 h5–+) 27.c7?? (27.f5 bc6 28.Rg2 Rg2 29.Bg2 g5 30.fg6 fg6 31.Ne1 g5 32.Kh5 Nd6 33.h4–+) 27...g5 (27...Nd6 28.ed6 Ne7 29.de7=+) 28.Kh5 Ngf6! 29.ef6 Nf6 (29...Nd6?! 30.fg5 hg5 31.Kg5–+) 0–1. gtx1000 – AburameShino, internet, 2007.

4.h3 e6 5.c3 d4 =+.

4.d4 e6

5.Ba3 Be7 6.Bd3 Nh6 7.Nf3 Nd7 8.Nbd2 (8.0–0!?=) 8...Bd3–/+ 9.cd3 Nf5 10.Nb3 0–0 11.Nc5 (11.0–0 a5 12.Qd2 b6+=) 11...b6 (11...Nd4!? 12.Nd4 Bc5–/+) 12.Nd7+= Qd7 13.Qa4 f6 14.Rc1 Rac8 15.0–0 Rf7 16.Rc3 Qb7 17.Rfc1 b5 18.Qc2 Bd8 (18...Qa6!?=) 19.Rc6+= Rfc7 20.Rc7 Rc7 21.Qe2 Rc6 22.Rc5 a6 23.Qc2 Rc7 24.Bc1 Kf7 25.Bf4 Rd7 26.a4 Be7 27.Rc8 Bb4 28.ef6 gf6? 29.Bh6 Nh6–+ 30.Rh8 Kg7 31.Qc8 Qc8 32.Rc8 ba4 33.Re8 Rc7 34.g3 Rc6 35.Nh4 a3 36.Rb8 a2 37.Rb4 a1Q 38.Kg2 Nf5 39.Nf3 Rc2 40.g4 Ne3 41.Kg3 Ng4! 42.Kg4 Rf2 43.Nh4 Rh2 44.Rb7–+ Kh6 45.Rf7 Qd4 46.Kg3 Qf2 47.Kg4 Rh4# 0–1. Bayer,Marius (2000) – Biggel,M (2000), remoteschach.de, 2007. (=1.e4 c6 2.b4 d5 3.e5)

5.c3 Nd7 6.Nf3 a5 7.b5 c5 8.Be2 cd4 9.cd4 f6 10.0–0 fe5 11.de5 Bc5 12.Nc3 Rc8 13.Nd4 (13.Na4 Bb4 14.a3 Bc2+=) 13...Bd4 14.Qd4 Ne7 15.Bb2 (15.Bh5 Ng6+=) 15...0–0 16.g4 Bg6 17.Ba3 Qb6 (better is 17...b6=) 18.Qb6+/– (18.Be7?? Qd4 19.Bf8 Nf8 20.Nd5 ed5–+) 18...Nb6 19.Be7 Rf7 20.Nd5 Nd5 21.Bg5 Nc3 22.Rfe1 Ne2 (22...Rc5 23.Rac1+=) 23.Re2 Bd3 24.Rb2 Rc5 25.Be3 Re5 26.b6 Rd5 27.Rd2 e5 28.Rc1 Rfd7 29.Rc7 Kf7 30.f4 e4 31.Rd1 g6 32.a4 Ke6 33.Rdc1 Be2 34.h3 h5 35.gh5 Bh5 36.R1c4 Bf3 37.Kf2 Bh1 38.Rc1 Bf3 39.Rg1 Kf6 40.Bc1 Bd1 41.Rg5 Ba4 42.Bb2 Ke6 43.Rg6 Kf7 44.Rf6 Ke7 45.Ke3 Bc6 46.f5 (46.Rfc6 bc6 47.Ke4 Rc7 48.bc7 Kd7–/+) 46...Rd3= 47.Kf4 Rf3 (47...Rh3? 48.Re6 Kf8 49.Rec6 bc6 50.Rd7+–) 48.Ke5 Rh3 49.Rd6 Ke8 50.Rdc6?? (50...bc6 51.Rc8 Rd8 52.Rd8 Kd8 53.Ke4–/+; better is 50.Rdd7 Bd7 51.Rb7+/–) 1–0. Taulien,Hans_Juergen – Luehrig,Walter, RSM2002 remoteschach.de, 2002.

5.c3 f6 6.Bd3 Bd3 (6...a5 7.ba5 fe5 8.Bf5 ef5 9.de5=) 7.Qd3 fe5 8.de5 a5 9.b5 (9.ba5 Nd7 10.Nf3 Qa5=) 9...cb5 10.Nf3 b4 (10...Qd7 11.Be3=+) 11.0–0 (11.Ng5 Qc7 12.f4 Qe7=) 11...Ne7 (11...Nc6 12.Be3=+) 12.a3 (12.cb4 ab4 13.Ng5 Qb6=) 12...b3 (12...ba3 13.Na3 Ng6 14.Nc2=+) 13.c4 (13.Qb5 Nd7 14.Qb3 Qc7=) 13...a4=+ 14.Ng5 (14.Bg5 Qa5=+) 14...Qd7 15.Nc3 Nbc6 16.cd5 Nd5 (16...Ne5 17.Qe4 N5g6 18.Ne6+– (18.Qe6?! Qe6 19.Ne6 Kf7+=)) 17.Nd5 (17.Bb2 Ra5=+) 17...Qd5–/+ (17...ed5? 18.e6 Qc7 19.Nf7+– (19.Nh7?! 0–0–0 20.Bb2 Bd6=+; worse 19.Qd5 Ra5 20.Qd2 Bd6=+)) 18.Qh3 Be7 (better 18...Qe5 19.Ne6 Kf7 20.Ng5 Kg8=) 19.Ne6+= Kf7 20.Nc7 Qe5 21.Bf4! Qf6 (21...Qf4 22.Qe6 Double attack) 22.Bg5!+– Qg5 23.Qe6 Kf8 24.Na8 g6 25.Nb6 Qf5 (25...Nd4 26.Qc8 Kg7 27.Qb7 Rf8+–) 26.Qf5 (26.Qc4!? Kg7 27.Qa4 b2+–) 26...gf5+– 27.Rfd1 Rg8 (27...Kf7 28.Rd7 Rb8 29.Re1+–) 28.Na4 Rg4 29.Nb2 Bf6 (29...Nd4 30.Rd3+–) 30.Rab1 Nd4 31.Rd3 Rg7 32.Nd1 Rc7 33.Kf1 Rc5 (33...b5 34.Nc3 Rc4 35.g3+–) 34.Rh3 (34.Nc3 Ke7+–) 34...Ra5 (34...Kg7 35.Nc3+–) 35.Nc3 Kg7 (35...Ra3 36.Ne2+– (36.Rh7?! b2 37.Rb7 Rc3 38.R7b2 Kf7+=)) 36.Ne2 Ne2 37.Ke2 b2 38.Rb3 (38.Kd2 b5+–) 38...Re5 (38...b5 39.Kd2+–) 39.Kf3 Re7 40.Rb5 (40.Kf4 Re2 41.Rb7 Kg6+–) 40...Rc7 (40...Kg6 41.Rb6 Kg7 42.Kf4+–) 41.Rf5 Rc3 42.Ke2 Ra3 43.Rb5 Ra6 (43...Ra7 44.f4+–) 44.Rb7 Kg6 45.R1b2 Bb2 46.Rb2 h5 (46...Kf5 47.h3+–) 47.Kf3 (47.g3 Kf6+–) 47...Ra3 48.Kf4 (48.Ke4 Ra4 49.Ke5 Ra5 50.Kd4 Ra4 51.Kd5 Ra5 52.Kc4 Ra4 53.Kb5 Ra1+–) 48...Rc3 (48...Ra4 49.Ke5+–) 49.f3 Rc6 (49...Rc4 50.Ke5+–) 50.Kg3 (50.g3 Rf6 51.Ke4 Re6 52.Kd4 Re1+–) 50...Rc3 (50...Rc5 51.Kh4+–) 51.Kh4 Rc4 52.g4 Rc6 (52...hg4 53.fg4 Rc6 54.Rb3+–) 53.Rb5 (53.gh5!? Kf5+–) 53...hg4 54.fg4 Ra6 (54...Rd6 55.Rg5 Kh7 56.Rf5+–) 55.Rb4 Rf6 1–0. Stockfish 5 64_bit – Strelka 5?5 64_bit, CCRL, 2014.

5.Bd2 Qb6 6.c3 a5 7.Qa4 Qc7 8.Nf3 b5 9.Qd1 a4 10.Nh4 Bg6 (10...Be4!?=) 11.Ng6+= hg6 12.Na3 Qb6 13.Qf3 Ne7 14.0–0–0 Na6 15.Nc2 Nc8 16.Bd3 Be7 17.a3 Qc7 18.h4 (18.Be3 Rh7+/–) 18...Nb6 (18...Rh4 19.Rh4 Bh4 20.Rh1+–) 19.h5 g5 (19...Rh5 20.Rh5 gh5 21.Qh5+/–) 20.Qg4+/– Qd8 21.f4 gf4 22.Qg7 (22.Bf4?! Bf8+/–; 22.Qf4?! Nc4+=) 22...Kd7 23.Qf7 Qc7 (23...Rf8 24.Qg6+–) 24.Qf4 (24.Bf4?! Rhf8 25.Qg7 Rf4=) 24...Raf8 25.Qg4 Rhg8 26.Bg6 Nc4 27.Bh6 Rf2 28.Rdf1 Rc2 29.Kc2 Na3 30.Kb2 Nc4 31.Kb1 a3 32.Rf7 a2 (32...Rh8 33.Bg5 Re8 34.Rg7+–) 33.Ka1 (33.Ka2 Ra8 34.Kb1 Na3 35.Kc1 Nc4+–) 33...Ne5 (33...Rh8 34.Bg5 Re8 35.Qh4 Ne5 36.de5 (36.Be7?! Nf7 37.Rf1 Re7 38.Qe7 Ke7 39.Rf7 Kd6 40.Rc7 Nc7+–) 36...Qe5 37.Be7 Qc3 38.Ka2+–) 34.de5 Qe5 35.Qf3 Nb4 36.Re7! (36…Ke7 37.Qf7 Kd6 38.Bf8 Rf8 39.Qf8 Kd7 40.Qe8 Kc7 41.Qe7 Kb6 42.Qb4+–) 1–0. Taulien,Hans_Juergen – Jenull,Marco, remoteschach.de, 2002.

5.Bd3 Bd3 6.Qd3 Bb4 7.Bd2 (7.Nd2 Na6=+) 7...a5 (7...c5 8.Nf3–/+) 8.c3 Be7 9.Nf3 c5 (9...Qb6 10.0–0=+) 10.c4 dc4 11.Qc4 cd4 12.Nd4 Nh6 (12...Nd7 13.Nf3=+) 13.Bh6= gh6 14.0–0 Na6 15.Rd1 Rc8 16.Qa4 Qd7 17.Qd7 (17.Nb5!? Qc6 18.N1c3+=) 17...Kd7=+ 18.Nf5 Ke8 19.Nh6 (better 19.Ne3=+) 19...Bc5?? (19...f5 20.Nd2 Bg5 21.Nf5 ef5 22.Nb3–+) 20.a3 (better 20.Nd2=) 20...Bd4–/+ 21.Ra2 Be5 22.h3 (22.Re2 Bc7–/+) 22...Ke7 23.Ng4 Rhd8 24.Rad2 Rd2 25.Nd2 Rc2?? (better 25...Bd6 26.a4 Bb4–+) 26.Ne5+– b5 (26...Nc5+–) 27.Ne4 Nc5 (27...Nb8 28.Rb1 Re2 29.Rb5 Re4 30.Rb7 (30.Rb8?! Re5 31.Rb7 Kf6=) 30...Kf6 31.Ng4 (31.Rb8?! Re1 32.Kh2 Re5=) 31...Kg6 32.Rb8+–) 28.Nc6 Kf8 29.Nc5 (29.Nd4!? Rc4 30.Nd6 Rc3 31.N6b5 Rc4+–) 29...Rc5 30.Na5 Rc3 31.Ra1 f5 (31...Ke7 32.Kf1+–) 32.f4 Ke7 33.a4 ba4 34.Ra4 Kf6 (34...Kd6 35.Nc4 Kd5 36.Ne5+–) 35.Nc4 h6 (35...Rc1 36.Kf2+–) 36.h4 (36.Ne5 Rc7+–) 36...Rc2 37.Ne3 Re2 38.Ra3 Kg6 39.g3 Kf7 (39...Re1 40.Kf2 Rb1 41.h5 Kh5 42.Ra6+–) 40.g4 (40.Nc4 Kg6+–) 40...fg4 41.Ng4 (41.h5 Kg7+–) 41...h5 42.Ne5 Kf6 43.Rg3 Kf5 44.Nd3 (better 44.Ng6!? Rd2+–) 44...Ke4 45.Nc5 (better 45.Nf2!? Kf4 46.Kg2 Rd2+–) 45...Kf4 46.Rg5 e5? (better 46...Kf3+–) 47.Rh5?? (better 47.Nd3 Ke3 48.Ne5+–) 47...Kg4 48.Rh8 Kg3?? (better 48...Re1 49.Kf2 Rh1=) 49.Kf1+– Rh2 50.h5 Kf3 51.h6?? (better 51.Ke1 Ke3 52.Kd1+–) 51…Rh1 0–1. Eyedoc_andy (1605) – Darkseid (1875), ChessWorld.net, 2016. (=1.e4 c6 2.b4 d5 3.e5)

5.c3 a5

6.ba5 Qa5 7.Nf3=.

6.ba5 Nd7 7.Bd3 Bd3 8.Qd3 Qa5 9.Ne2 Ne7 10.0–0 Ng6 11.f4 Qb6 12.Be3 Be7 13.Nd2 Nh4 14.g4 (14.Ng3 Qa6 15.Qc2 b5=) 14...0–0 15.f5 ef5 16.gf5 Qa6 17.c4 (17.Nc1 b5=) 17...Rfe8 18.Ng3 (better is 18.Nf4!?=) 18...Nb6–/+ 19.f6 gf6 (19...dc4 20.Qe4 Bf6 21.Rf6 gf6 22.Qh4+=) 20.Nf5 Nf5 21.Qf5 Nc4 (21...dc4 22.Ne4 Qb5 23.Rab1+–) 22.Bh6 Kh8 23.ef6 Bf8 24.Bg7! Bg7 25.fg7 Kg7 26.Qf7 Kh8 27.Qf6 Kg8 28.Kh1 Ne5 29.de5 (29.Rg1 Ng6 30.Rg6 hg6 31.Qg6 Kh8 32.Rg1 Re7 33.Qf6 Kh7 34.Qh4) 29...Qd3 30.Rg1 Qg6 31.Rg6 hg6 32.Qg6 Kh8 33.Qh6 Kg8 34.Rg1 Kf7 35.Qf6# 1–0. Labahn,Wolfgang – Psion, 4', 1990.

6.ba5 Nd7 7.Bd3 Bd3 8.Qd3 Qa5 9.Ne2 (9.Nf3 Qa6 10.Qc2 Ne7=) 9...Ne7 10.0–0 (10.Nd2 c5=) 10...Ng6 (10...c5 11.Nd2=) 11.f4 Qb6 (11...Ne7 12.Ng3=) 12.Be3 (12.Nd2 Be7=) 12...Be7 (12...Ne7 13.Nd2+=) 13.g4 (13.f5 ef5 14.Qf5 Nde5+=) 13...c5 (13...Nh4 14.f5+=) 14.Nd2 (14.f5 c4 15.Qd2 Nh4+=) 14...0–0 (14...c4 15.Qb1=) 15.Ng3 (15.f5 Nh4=) 15...Qc6 16.f5 c4 (16...Nh4 17.g5 ef5 18.Nf5 Nf5 19.Qf5+=) 17.Qe2 (17.Qb1 Nh4=) 17...Nh4 18.Nf3 (18.Nh5 Ra3+=) 18...Nf3 (18...Ra3 19.Nh4 Bh4 20.fe6 fe6 21.Rf8 Nf8 22.Qb2+=) 19.Rf3 Qb6 (19...f6 20.ef6 Bf6 21.g5+=) 20.g5= g6 (20...ef5 21.Nf5 Rfe8 22.Rf2=) 21.f6 Bd8 22.Qg2 Bc7 23.Qh3+= Qb2?? 24.Raf1 Ra2?? 25.Bf2 Ra1?? 26.Be1 Kh8 27.Nh1?? Bb6?? 28.Qh6 Bd4 29.cd4 Qd4 30.Nf2 Nf6 31.ef6 Qf2 32.Bf2 Rf1 33.Kf1 Rg8 34.Qh7! Kh7 35.Rh3# 1–0. Labahn,Wolfgang – PsionChess, Paderborn, 1990.

6.ba5 Nd7 7.Nf3 Qa5 8.Bd3 Bd3 9.Qd3 c5=.

6.b5 a4 7.Ba3 Ba3 8.Na3 Ne7 9.Nf3 0–0 10.Be2 Nd7 11.0–0 Ng6 12.Qd2 f6 13.ef6 Qf6 14.Nc2 (14.bc6 bc6 15.Rae1 Be4–/+) 14...Be4=+ 15.Nfe1 (15.bc6 bc6 16.Ne3 Nf4–/+) 15...Nf4–/+ 16.f3 Qh6 (16...Bc2 17.Qc2 c5 18.Rd1–/+) 17.Rd1 Bc2 18.Nc2 e5 19.g3 White gets the initiative 19...Qg6 Black prepares e4 20.Kh1 (20.Bd3 Nd3 21.Qd3 Qh5=+) 20...Ne2–/+ 21.Qe2 Rae8 Black intends e4 22.bc6 bc6 23.Qd3 e4 (23...Qd3 24.Rd3 e4 25.Re3=+) 24.fe4=+ Rf1 25.Rf1 Nf6 26.Nb4 Ng4 (better is 26...Ne4 27.a3 Qh6=+) 27.e5+/– Qh5 (27...Qh6 28.Qe2 Ne3 29.Rf4+/–) 28.Qe2 Re6 (28...Qg6 29.Rf4 h5 30.a3+/–) 29.Rf4 Nf6 30.Qh5 Nh5 31.Rf2 g6 32.Nd3 Re7 33.Rb2 Kf7 34.Rb6 Rc7 35.Ra6 Ng7 36.Ra4 Ne6 37.Ra6 c5 38.Re6 Ke6 39.Nc5 Ke7 40.a4 Ra7 41.Kg2 Ra8 42.Kf2 Rb8 43.a5 Rb2 44.Ke3 Rh2 45.a6 Rg2 46.Kf4 Rc2 47.Na4 Ra2+= 48.Nc5 Ra3 49.Kg5 Rc3+= 50.g4 Kf7 51.e6+/– Ke7 52.Kh6 Rh3 53.Kg5 Kd6 54.Kf6+– Rf3 55.Kg5?? Rf2 56.Kh6+– Rh2 57.Kg5?? h5 58.gh5 gh5 59.Na4 Ra2 60.Nc5 Ke7 61.Kh5+– Kf6 62.Kg4 Rh2 63.Kf4 Rh7?? 64.Nd7+– Ke7 65.a7 Rh8 66.Nb8 Rf8 67.Ke5 Rb8 68.ab8N (68...Ke8 69.Kd6+–; 68.ab8R?!=; 68.ab8Q?!=) 1–0. Labahn,Wolfgang – Wehmeier,S (2400), Paderborn, 1990.

6.b5 a4 7.Bd3 Bd3 8.Qd3 Nd7 9.f4 (9.bc6 bc6 10.Nf3 c5=) 9...g6 (9...cb5 10.Qb5 Qc7 11.Nf3+=) 10.Nf3 h5 (10...cb5 11.Qb5 Qb6 12.Na3=) 11.0–0 Nh6 12.Be3 (12.bc6 bc6 13.c4 Nf5+=) 12...Nf5 (12...cb5 13.Qb5 Nf5 14.Re1=) 13.Bf2 (13.bc6 bc6 14.Nbd2 Nb6+=) 13...c5 14.Nbd2 (14.c4 dc4 15.Qc4 Nb6=) 14...c4 15.Qc2 Qb6 16.Rab1 a3 17.g3 (17.Nh4!?=) 17...Be7 18.h3 Ra5 19.Kg2 Nh6 (19...0–0 20.Rfe1–/+) 20.Nh2 (20.Rfd1 0–0+=) 20...0–0–/+ 21.g4 hg4 22.hg4 Rb5 23.Rb5 Qb5 24.Be3 f5?? (better is 24...Kg7–/+) 25.ef6+= Rf6 26.Rb1 (26.Qb1 Qb1 27.Rb1 Rf7+=) 26...Qc6= 27.Ndf1 Nf7 28.g5 Rf5 29.Ng3 Nd6 30.Nf5 ef5 31.Nf3 Ne4 32.Nd2 Nb6 33.Ne4 de4 34.Kf2 ½–½. Labahn,Dieter (2040) – Wobbe,Sven (2210), Wichern op 5th, 1999. (=1.e4 c6 2.d4 d5 3.e5 Bf5 4.b4 e6 5.c3 a5)

6.b5 Qb6 7.a4 c5 8.Nf3 Nd7 9.Be2 Rc8 10.0–0 Ne7 11.Be3 Ng6 12.Nbd2 Be7 13.h3 Nh4 14.Nh4 Bh4 15.f4 h5 16.Bh5 c4 17.Bg4 Bd3 18.Be2 Qd8 19.Bd3 cd3 20.Nb1 Nb6 21.Qd3 g6 22.Nd2 Bg3 23.Rf3 Bh4 24.Bf2 Be7 25.g4 Kd7 26.Nb3 Nc4 27.Qe2 b6 28.Kg2 Qg8 29.Nd2 Qg7 30.Nf1 1–0. Hernandez Agamez,Hugo – Gomez,Jorge Leonardo (1910), Bogota COL, McGregor Open, 2011.

6.b5 Qb6 7.Qa4=.

6.b5 Nd7 7.Nf3 Ne7 8.a4 (8.Nh4 Qc7=) 8...Ng6 9.h4 Bg4 10.g3 (10.h5 Nh4=) 10...c5 (10...Ne7 11.h5=) 11.Bg2 (11.h5 Ne7=) 11...Bh5 12.Ba3 (12.Bh3 Bf3 13.Qf3 cd4 14.cd4 Qb6=) 12...Nb6 (12...Rc8 13.0–0+=) 13.Bh3 (13.Nbd2 Rc8+=) 13...Bf3+= 14.Qf3 cd4 15.Bf8 Rf8 (15...Nf8 16.cd4 Rc8 17.Nd2+=) 16.cd4 Qc7 (16...Qe7 17.Ke2=) 17.Qc3 Rc8 18.Qc7 Rc7 19.Nd2 Rc3 20.Ke2 (20.Bg4 Ne7=) 20...Kd7 21.h5 Ne7 22.Rhb1 Rc2 23.Kd1 Rfc8 24.Bf1 Nf5 25.Bd3 R2c3 26.Bf5 ef5 27.Ke2 Rc2 28.Ke1 Nc4 29.Nf3 f6 30.ef6 gf6 31.Kf1 Rc3 32.Kg2 Na3 33.Rh1 R8c4 34.Ra2 Ra4 35.Rha1 Kc7 36.Re1 Kb6 37.Re7 Rac4 38.Rh7 Nb5 39.Rf7 Rc6 40.h6+= Re6 41.Nh4 f4 42.h7+/– Rc8 43.Ng6 f3 44.Kf3 Nd4 45.Kg4 f5 46.Kg5 Nf3 47.Kf5 Rg6 48.Kg6 Ne5 49.Kg7 Nf7 50.Kf7 Rc7 51.Kg6 Rc6 52.Kg5 Rc8 53.f4 d4 54.Rb2 Ka6 55.Rh2 Rh8 56.Kg6 a4 57.Kg7 Rc8 58.h8Q (58.h8Q Rc3 59.Qa8 Kb5 60.Rh5 Kb4 61.Qb7 Ka3 62.Qe7 Kb2 63.Qb4 Kc1 64.Rh2 a3 65.Qd4 Rc7 66.Kf6 Rc6 67.Ke5 Kb1 68.Qb4 Ka1 69.Qa3 Kb1 70.Qb2) 1–0. Naeter,Burkhard (2055) – Montalvo,Juan, IECC, 2000. (=1.e4 c6 2.d4 d5 3.e5 Bf5 4.b4 e6 5.c3 a5)

6.b5 c5

7.Ba3 Qb6 8.Nf3 Bg4 9.Qa4 Bf3 10.gf3 Nd7 11.Be2 Nh6 12.Bb2 cd4 13.cd4 Bb4 14.Kf1 0–0 15.a3 Be7 16.Qd1 Bh4 17.Nc3 f6 18.ef6 Rf6 (18...Bf6!? 19.Na4 Qd6 20.Bd3–+) 19.Na4–/+ Qd6 20.Rc1 Ng4 (20...Bg5!? 21.Rc2 Bf4–/+) 21.fg4+= Qf4 22.Bf3 Qf3 23.Qf3 Rf3 24.Kg2 Rf2 25.Kh3 Bg5 26.Rc3 (26.Rhf1 Rf1 27.Rf1 Rc8–+) 26...Nf6 27.Bc1 Ne4 28.Nb6? (better is 28.Rb3–+) 28...Raf8 29.Rd3 (29.Rc8 Rc8 30.Nc8 Bf6–+) 29...Rc2 30.Bg5 Nf2 31.Kg3 Nh1 (31...Nh1 32.Kh4 h6–+; worse is 31...Nd3 32.Nd7 Rf7 33.Ne5 Ne5 34.de5 Rc3 35.Kg2 Ra3 36.Rc1–+) 0–1. Holzer,Gerhard (2240) – Fusi,Christoph (2250), AUT–chT2O, 2000. (=1.e4 c6 2.d4 d5 3.e5 Bf5 4.c3 e6 5.b4 a5 6.b5 c5)

7.a4 cd4 8.cd4 Nd7 9.Ba3 Ba3 10.Ra3 Bb1 (10...Rc8 11.Bd3=) 11.Qb1 Rc8 (11...Ne7 12.Bd3=) 12.f4 (12.Rg3 g6=) 12...Qe7 (12...Nb6 13.Nf3=) 13.Ra1 Nb6 14.Nf3 Qc7 (14...Nh6 15.Qb2=) 15.Qd3 (15.Bd3 Qc3 16.Ke2 Ne7=) 15...Ne7 16.Be2 0–0 17.0–0 Qc2 18.Ne1 Qc3 19.Ra3 (19.Qc3 Rc3 20.Rf3 Rc7=) 19...Qc1 (19...Qb4 20.Bd1+=) 20.g4 (20.Ra2 Qc4 21.Qd2 Qc3 22.Qc3 Rc3=) 20...Rc4+= 21.Ra2 Ra4 22.Rc2 Qa1 23.Nf3 Qa3 24.Rc3 (24.Rc7 Ng6 25.f5 Nf4+=) 24...Qb2 25.Ng5 Ng6 26.f5 ef5 27.gf5 Nh4 28.f6 g6 29.Nf7 Ra2 30.Nh6 Kh8 31.Re1 Ra1 32.Ra1 Qa1 33.Kf2 Nd7 34.Ng4 1–0. Naeter,Burkhard (2030) – Ampiainen,Jesper (1985), IECC, 1999. (=1.e4 c6 2.d4 d5 3.e5 Bf5 4.b4 e6 5.c3 a5)

7.a4 Nd7 8.Be3 Rc8 (8...cd4 9.cd4 Rc8 10.Nd2–/+) 9.Bd3 (9.Nf3 cd4 10.Nd4 Bb1 11.Qb1 Ne5–/+) 9...cd4–/+ 10.cd4 (10.Bd4 Bd3 11.Qd3 Qg5–/+) 10...Bb4–+ 11.Ke2 (11.Kf1 Ne7–/+) 11...Ne7 12.f4 (12.Kf1 0–0 13.Nf3 Be4–+) 12...Nb6 (12...0–0 13.Nf3 f6 14.g3–+) 13.Bd2 (13.Nf3 Nc4 14.Bc1 Be4–+) 13...Bd3 14.Kd3 Qc7 (14...Nf5!? 15.Nf3–+) 15.Bb4 (15.Nf3 Nc4 16.Ke2 0–0 17.Bb4 ab4–+) 15...Qc4 (15...ab4!? 16.Nf3 Nc4 17.Qb3–+) 16.Ke3 Nf5 17.Kf2 Qb4 18.Ne2 Nc4 19.Qd3 Nb2 20.Qa3 (20.Qd2 Rc4–+) 20...Rc4 (20...Rc2 21.Qb4 ab4 22.Kf3–+) 21.Nbc3 (21.Qb4!? Rb4 22.Nd2–+) 21...Nd4 22.Rhb1? (22.Nd4 Rd4 (22...Qc3?! 23.Qc3 Rc3 24.Ke2–+; 22...Rc3?! 23.Qb4 Nd3 24.Ke3 Nb4 25.Ke2–+) 23.Qb4 Rb4–+) 22...Qa3 (better is 22...Nd3!? 23.Ke3 Ne2 24.Qb4 Nb4 25.Ne2 Nc2 26.Kd3 Na1 27.Ra1–+) 23.Ra3 Nd3 (23...Nc2 24.Ra2 Nd3 25.Kg3 Nf4 26.Rc1 Ne2 27.Ne2–+) 24.Kf1? (better is 24.Ke3 Ne2 25.Ne2–+) 24...Nc2–+ 25.Ra2 Ndb4 26.Rab2 Kd7 27.g3 (27.Rb3 d4 28.Ne4 d3–+) 27...Rd8 (27...Rhc8 28.Rb3 d4 29.Nd1–+) 28.Kg1 (28.b6 Rdc8 29.Rb3 Na6–+) 28...d4 (28...Rdc8 29.Nd1–+) 29.Nd1 (29.Ne4 d3 30.Nd6 de2 31.Nc4 Kc7 32.b6 Kb8–+) 29...d3 (29...Rdc8 30.Kf1–+) 30.Nec3 (30.Nc1 Na3 31.Ra1 Nbc2–+) 30...Rdc8 31.Kf2 (31.Na2 Nd5 32.Rb3 Ra4–+) 31...Rc3 32.Nc3 Rc3 33.Rb3 (33.Rd1 Ra3–+) 33...Nd5 34.h4 (34.R3b2 Ra3 35.Rd1 Ncb4–+) 34...Kc7 (34...Na3!? 35.Ra3 Ra3 36.Rb2–+) 35.b6 (35.R3b2 Ra3 36.Rb3 Ra2–+) 35...Kc6 36.h5 (36.R3b2 Ncb4 37.Ra1 Nb6–+) 36...Ncb4 (better is 36...d2 37.R3b2 Nde3 38.Ke2–+) 37.Rc3 (37.Kf3 Rc2–+) 37...Nc3 38.Rb3 Nbd5 39.Ke1 Kc5 40.h6 (40.Rb2 Na4 41.Ra2 Ndc3–+) 40...gh6 0–1. Coelho,CL Lima – Moura,PJ Alves B (2000), Praia da Pipa BRA, American Continental, 2014. (=1.e4 c6 2.d4 d5 3.e5 Bf5 4.b4 e6 5.c3 a5 6.b5 c5)

7.Bd3 Bd3 8.Qd3 c4 9.Qc2 b6 10.a4 Nd7 11.Ba3 (11.Nf3 Qc7=) 11...Ba3 12.Na3 Qg5 13.g3 0–0–0 14.f4 Qe7 15.Nf3 h5 16.Qg2 Kb8 17.Nc2 g6 18.Ne3 Nh6 19.Kd2 ½–½. Benend,Andreas (2210) – Homola,Uwe, Verbandsliga Nord Baden, 2008. (=1.e4 c6 2.d4 d5 3.e5 Bf5 4.b4 e6 5.c3 a5 6.b5 c5)

7.Bd3 Bd3 8.Qd3 c4 9.Qf3=.

7.Bd3 Bd3 8.Qd3 cd4 9.cd4 Nd7 10.Ne2 (10.Nf3 Rc8 11.0–0 Bb4=) 10...Ne7 11.0–0 g6 (11...Rc8 12.Be3=) 12.f4 (12.Be3 Nf5+=) 12...h5 (12...Nf5 13.Ba3=) 13.Nd2 Rc8 (13...Nf5 14.Ba3+=) 14.Ba3 Nf5 (14...h4 15.Rac1+=) 15.Rac1 (15.Bf8 Rf8 16.Rac1 Rc1 17.Rc1 h4+/–) 15...Be7 (15...Rc1 16.Rc1 (< 16.Nc1 Ba3 17.Qa3 Nd4–/+; 16.Bc1?! Bb4+=) 16...Bg7 17.Ng3+=) 16.b6 (16.Be7 Ne7 17.Rc8 Qc8+/–) 16...Nb8 (16...Rc1!? 17.Rc1 Qb6 18.Rc8 Bd8=) 17.Be7 (17.Rc8 Qc8 18.Rc1 Nc6+/–) 17...Ne7+= 18.Qb5 Nbc6 (18...Nd7!?+/–) 19.Nb3 0–0 20.Nc5 Rb8 21.Rfd1 Kg7 22.a3 h4 23.Rc3 Rh8 24.Nc1 g5 25.fg5 Nf5 26.g6 Kg6 27.Ne2+– Qg5 28.Rf3 Rhg8 29.Nd7 Kh6 30.g3 Rbc8 31.Qd3 Rg6+= 32.Nf6 hg3?? 33.hg3 Kg7 34.Kf2 Rh8 35.Rf5= ef5 36.Rg1 Rh2 37.Rg2 Rg2 38.Kg2 Rf6 39.ef6 Qf6 40.Nf4 Qd4 41.Qd4 ½–½. Labahn,Wolfgang (2215) – Jaeger,Manfred, Dortmund op–A, 1993.

7.Bd3 Bd3 8.Qd3 h5 9.Nf3 Nh6 10.0–0 Nf5 11.Na3 Be7 (11...c4 12.Qe2=) 12.dc5+= Bc5 13.c4 dc4 (13...0–0 14.Rd1 Qb6 15.cd5 Bf2 16.Kh1+–) 14.Qd8 Kd8 15.Nc4 Ke7 16.Bd2 b6 17.Rac1 Nd7 18.Rfd1 Rac8 19.Bf4 Rhd8 (19...f6 20.g3+=) 20.h3 f6 21.g4 hg4 22.hg4 Nh6 23.ef6 Nf6 24.Nd6 (24.Rd8 Rd8 25.Nfe5+–) 24...Bd6? (24...Ra8 25.Nb7 Rd1 26.Rd1 Bb4= (worse 26...Nhg4 27.Nc5 bc5 28.b6+–)) 25.Rc8+– Rc8 26.Bd6 (worse 26.Rd6 Nd5 27.Bg3 Rc3=) 26...Kd7? (better 26...Ke8 27.g5 Nf5 28.gf6 gf6+–) 27.Ne5 Ke8 28.g5 Nhg4 (28...Rc2 29.gh6 (29.gf6?! gf6 30.Nc6 Ra2+–) 29...gh6 30.a4+–) 29.gf6 gf6 (29...Nf6 30.Kg2 Rc2+–) 30.Ng4 Kf7 (30...Rc2 31.Nf6 Kf7 32.Nd7 Ra2 33.Be5+–) 31.Ne3 1–0. Janek – Imdogg, internet, 2018. (=1.e4 c6 2.b4 d5 3.e5 Bf5 4.d4 e6 5.c3 a5 6.b5 c5)

7.Bd3 Bg6 8.a4 Qb6 9.Bg6 hg6 10.Ba3 Nd7 11.Ne2 Nh6 12.0–0 Nf5 13.g4 Nh4 14.Qd3 Rc8 15.Nd2 g5 16.Nf3 Be7 17.Nh4 Rh4 18.h3 Qc7 19.Kg2 Nb6 20.Bc1 cd4 21.cd4 Qc2 22.Qc2 Rc2 23.Ng1 Rh8 24.Nf3 Nc4 25.Re1 Bb4 26.Rh1 f6 27.ef6 gf6 28.Rd1 Bc3 29.Rb1 Ra2 30.Rb3 Bb4 31.Ne1 Be1 32.Re1 Kd7 33.Kg3 Ra4 34.f4 gf4 35.Bf4 Ra3 36.Ra3 Na3 37.b6 Nc4 38.Bc7 a4 39.h4 a3 40.Ra1 Kc6 41.g5 fg5 42.hg5 Kb5 43.Kg4 Ka4 44.g6 Ne3 45.Kg5 Nf5 46.Kf6 Nd4 47.Be5 Nc2 48.g7+= Rc8 49.Rh1 Rg8 50.Kf7 Rg7 51.Bg7 d4 52.Rd1 a2 53.Bd4 Nd4 54.Rd4 Kb3 55.Rd1 e5 56.Ke6 e4 57.Kd5 e3 58.Re1 Kb2 59.Re2 Kb1 60.Re3 (60.Re3 Kb2 61.Re2 Kb3 62.Ra2 Ka2 63.Kd6+–) 1–0. Rodriguez Garcia,JA – Rodriguez Uria,JA (2225), Asturias–chT, 1993. (=1.e4 c6 2.d4 d5 3.e5 Bf5 4.c3 e6 5.b4 a5)

7.Bd3 Bg6 8.Ne2 Nd7 (8...Bd3 9.Qd3 c4 10.Qg3=) 9.0–0 Ne7 (9...Qh4 10.Bf4=) 10.f4 (10.Bg5 f6 11.ef6 gf6=) 10...Qb6 11.Kh1 (better is 11.Na3!?=) 11...Bd3–/+ 12.Qd3 c4 13.Qh3 (13.Qc2 Qb5 14.Na3 Qc6–/+) 13...Qb5 14.g4 (14.Ng3 a4–/+) 14...g6 (14...Qc6 15.f5–/+) 15.Ng3 White plans f5 (15.Nd2 h5–/+) 15...Qc6 (15...a4 16.Nd2–/+) 16.Nd2 (16.f5 gf5 17.gf5 b5–/+) 16...0–0–0 (16...b5 17.a3–/+) 17.Nf3 (17.Rb1 Qa4=+) 17...Bg7 (17...Qb6 18.Be3 Qb2 19.Ng5=) 18.f5 (18.Ba3 Rhe8=) 18...gf5= 19.gf5 Nf5 20.Nf5 ef5 21.Qf5 Kb8 22.Qf7+/– Rhg8 23.e6+– Nb6 24.e7 Rde8+/– 25.Ng5 Qd7= 26.Ba3 Bh6 27.Ne6 Nc8 28.Rf6 Qa4?? 29.Nc5+– Qa3 30.Rb1 The mate threat is Rxb7 30...b6 31.Qd5 Threatening mate: Qb7 31...Re7 32.Rfb6! Nb6 A pinning theme 33.Rb6 Decoy to b6 33...Kc7 34.Rb7 (34...Kc8 35.Qc6 Kd8 36.Rb8#; 34.Qb7 Kd8 35.Qb8#) 1–0. Labahn,Wolfgang (2215) – Kleff,Andre, Dortmund op–A, 1993.

7.Bd3 Bg6 8.Nf3 Bd3 9.Qd3 c4=.

7.Nf3 Nd7=.

4.Nf3 e6

5.a3 Ne7 6.Bb2 Nd7 7.Nh4 Bg4?? (7...Be4 8.d4=) 8.Be2 (better 8.Qg4 a5 9.Be2+–) 8...Be2=+ 9.Qe2 c5 10.d3 (10.bc5 Nc6 11.Nf3 Bc5=+) 10...cb4–/+ 11.ab4 (11.Nf3 Nc6–/+) 11...Nc6 12.Nf3 Bb4 13.c3 Be7 14.0–0 0–0 15.Na3 a6 16.Rfd1 b5 17.Nc2 Qc7 18.c4 bc4 (18...dc4 19.dc4 b4 20.Rd2–+) 19.dc4 Nb6 20.cd5 Nd5 21.Ra6 (21.Ncd4 Rfb8–/+) 21...Ra6 22.Qa6 Ne5 23.Be5 Qc2 24.Qd3 Rc8 25.Qc2 Rc2 26.h3 h6 27.Rd2 Rd2 28.Nd2 f6 29.Bg3 Kf7 30.Kf1 e5 31.f4 (31.f3–+) 31...Nf4 32.Kf2 (32.Bf4 ef4 33.Ke2 f5–+) 32...Ke6 (32...Nd5 33.Nc4–+) 33.Kf3 (33.Bf4 ef4 34.Ke2 f5–+) 33...Nd5 34.Nc4 Bd6 35.Bh2 (35.Ke2–+) 35…e4! (35...e4 36.Ke4 Bh2–+) 0–1. mizuzul (2155) – Settebello (2360), ChessWorld.net, 2018. (=1.e4 c6 2.b4 d5 3.e5 Bf5)

5.Bb2 Bb4 6.a3 Ba5 7.Nc3 Ne7 8.Be2 0–0 9.0–0 c5 10.Nb5 Nc8 11.Bc3 a6 12.Ba5 Qa5 13.Nc3 d4 14.Na2 Nc6 15.Nc1 Qc7 16.Nd3 c4 17.Nf4 b5 18.a4 Nb6 19.ab5 ab5 20.g3 (20.d3 Ra1 21.Qa1 f6–+) 20...Na4 (20...Nd7!? 21.Ra8 Ra8 22.Nh4–+) 21.Re1 Rfd8 (21...Ne5?! 22.Ne5 Qe5 23.Bf3–/+) 22.Qc1 Nb4 (worse is 22...Ne5 23.Ne5 Qe5 24.Bf3–/+) 23.d3 cd3 24.cd3 Qc1 (24...Nc3 25.Ra8 Ra8 26.Nd4 Ne2 27.Nde2 Qe5 28.Nc3–+) 25.Rec1–/+ Nc3 26.Ra8 Ra8 27.Nd4 Ne2 28.Nfe2 Bd3 (28...Nd3!? 29.Rb1 b4–/+) 29.Nc3. usingprogram (1875) – danielstevens, kurnik, 2011. (=1.e4 c6 2.b4 d5 3.e5 Bf5)

5.Bb2 Bb4 6.a3 Ba5 7.Nc3 Ne7 8.Be2 Qc7 9.0–0 –/+.

5.Bb2 Bb4 6.a3 Ba5 7.Nc3 Ne7 8.Be2 d4 9.Na4+= b5 10.Nc5 0–0 11.Nb7 Qc7 12.Na5 Qa5 13.Nd4 Nd7 14.0–0 Rfd8 15.a4 b4 16.f4 a6 17.d3 c5 18.Nb3 Qb6 19.a5 Qa7 20.Rf2 c4 21.Bd4 Qc7 22.dc4 Nb8? (better is 22...Nc6!?+=) 23.Qe1+/– Bc2? (better is 23...Nd7 24.Qb4 Nc6+–) 24.Bb6+– (24.Bb6 Qc8 25.Bd8 Qd8 26.Bf3 (26.Qb4?! Nbc6 27.Qc3 Bb3 28.Qb3 Na5+–) 26...Bb3 27.Ba8 Bc4 28.Qb4+–) 1–0. usingprogram – danielstevens, internet, 2011. (=1.e4 c6 2.b4 d5 3.e5 Bf5)

5.Bb2 Bb4 6.a3 Ba5 7.Be2 Bc7 8.0–0 Nd7 9.d4 c5 10.Nc3 Ne7 11.Nb5 a6 12.Nd6 Bd6 13.ed6 Nc8 14.dc5 Nc5 15.Qd4 Qd6 16.Qg7 Rf8 17.Be5 Qe7 18.Bf6 Qd6 19.Rab1 (19.Be5 Qd7=) 19...Ne7 20.Ng5 Rg8?? (better is 20...Bc2 21.Be5 Qd8+=) 21.Be7+/– Ke7?? (better is 21...Rg7 22.Bd6 Rc8+/–) 22.Qf7+– Kd8 23.Qg8 Kc7 24.Qa8 1–0. usingprogram – andrew2496, internet, 2011. (=1.e4 c6 2.b4 d5 3.e5 Bf5)

2.e4 e5

3.a3 a5 4.Bb2 (4.d4 Qe7=) 4...ab4 (4...d5 5.ed5 cd5 6.Be5=) 5.ab4 (5.Be5 Qe7 6.ab4 Ra1 7.Ba1 Qe4 8.Qe2 d5=) 5...Ra1 6.Ba1 d6 (6...Qe7 7.Nf3=) 7.c3 (7.d4!?=) 7...Nf6 8.d3 (8.Qe2 Be7=+) 8...g6 (8...d5 9.Nd2=+) 9.Nf3 Bg7 (9...Nbd7 10.Nbd2=) 10.Qa4 (10.Be2 0–0=) 10...0–0 11.Qa7 (11.Qc2 Bg4=) 11...Nbd7 12.Nbd2 Qb6 (12...d5 13.c4=+) 13.Qb6 (13.Qa5 Qd8=) 13...Nb6 14.d4 (14.Be2!?=) 14...ed4=+ 15.cd4 (15.Bd3 dc3 16.Bc3 Re8–/+) 15...Re8–/+ 16.e5 Bg4 (16...de5 17.de5 Bg4 18.Bd3–/+) 17.Be2 (17.h3 Bf3 18.Nf3 Nfd7–/+) 17...de5 18.Ne5 (18.de5 Nfd7–/+) 18...Be2–+ 19.Ke2 Nfd5 20.Rd1? (better is 20.Kf3–+) 20...f6 (20...Nb4?! 21.Kf3–+) 21.Kf1 (21.Ndf3 fe5 22.de5 Nc4–+) 21...fe5 22.Re1 (22.de5 Nb4 (22...Be5?! 23.Re1–+) 23.Bc3 N4d5–+) 22...Bh6 (22...Nb4 23.de5 N6d5 24.Nf3–+) 23.Nf3 (23.Ne4 ed4 24.Bd4 Nc4–+) 23...e4 24.Ne5 e3 (24...Ra8 25.Rb1–+) 25.f3 (25.Ng4 Kg7–+) 25...Nb4 26.Rb1 (26.Ng4 Bg5 27.h4 Bh4 28.Re3 Ra8–+) 26...N6d5 27.Bb2 (27.g3 Ra8 28.Ng4 Bg7–+) 27...c5 (better is 27...Nf4 28.Re1 Nc2 29.Re2 Ne2 30.Ke2–+) 28.dc5 (28.g3 cd4 29.Bd4 e2 30.Kf2 g5 31.Ke2 Nc6–+) 28...Bg7 (better is 28...Bf4 29.Ba3 Re5–+) 29.Ng4 (29.g3 Be5 30.Be5 Re5 31.Re1–+) 29...e2 30.Kf2 Nd3 31.Kg3 Nb2 32.Kf2 Bc3 (33.Nh6 Kg7–+; 32...Nd1 33.Rd1 ed1Q 34.Kg3 Qe1 35.Nf2 Qe5 36.f4 Qe3 37.Kg4 h5 38.Kg5 Re5 39.Kg6 Nf4#) 0–1. tomnrw – nordlicht, mySchach.de, 2003.

3.a3 d6 A) 4.Nf3 f5 (4...Nf6 5.Nc3 Be7 6.d4 Nbd7=; 4...Be7 5.d4 ed4 6.Nd4 Nf6=; 4...a5 5.b5 Nf6 6.Nc3 d5=; 4...Bg4 5.h3 Bh5 6.Nc3 Nf6=) 5.ef5 Bf5 6.Bc4 d5=; B) 4.d4 ed4 5.Qd4 Be7 6.Nc3 Bf6=; C) 4.Nc3 f5 (4...Nd7 5.Nf3 Ne7 6.d4 Ng6+=; 4...Nf6 5.Nf3 Be7 6.d4 ed4=; 4...Be7 5.Nf3 Bg4 6.h3 Bh5=; 4...a5 5.b5 Nf6 6.d4 ed4=) 5.d4 Nf6 6.Bg5 Qe7=.

3.Ba3 Ne7 4.d4 d5 5.f3 (5.de5 Qc7 6.Qd4 de4=) 5...Nd7 6.c3 b6 7.Bd3 Bb7 8.Ne2 Qc8 9.Nd2 a6 10.0–0 Ng6 11.Bb2 (11.f4 ed4 12.cd4 de4 13.Ne4 Qc7+/–) 11...Be7 12.Qb3 Qc7 13.c4 Nf4 (better is 13...Qd6 14.c5 Qc7+=) 14.de5 (14.Nf4!? ef4 15.ed5 cd5 16.Rfe1+/–) 14...Bg5 (14...Bb4!? 15.Nf4 Bd2+=) 15.Qc2 (15.Nf4 Bf4 16.Rad1 Ne5 17.ed5 Bh2 18.Kh1 Qd6=) 15...Ne2 16.Be2 Be3 17.Kh1 Bg5? (better is 17...d4 18.c5 bc5 19.bc5 Ne5+/–) 18.f4 (18.cd5 Bf4+–) 18...Be7 19.a3 (better is 19.cd5 Bb4 20.Nb3+–) 19...a5? (better is 19...de4 20.Ne4 c5+–) 20.c5 a4? (20...bc5 21.Nb3) 21.f5 (better is 21.e6 fe6 22.cb6 (worse is 22.Bg7 Rg8 23.Bh5 Kd8 24.cb6 Qb6+–) 22...Nb6 23.Bg7+–) 21...Nf8?? (better is 21...bc5 22.e6 Ne5+/–) 22.cb6 (better is 22.f6 gf6 23.ef6 Bc5 24.bc5 bc5 25.Qc5 Ne6+–) 22...Qb6 23.f6 Bd8 (23...gf6 24.ef6 Bd6+–) 24.fg7 Ng6 (24...Rg8 25.ed5 cd5+–) 25.gh8Q 1–0. Rafalski,Krzysztof (1665) – Przybylak,Gabriela, Ogolnopolski Integracyjny Turniej Szachowy Poland, 2012. (=1.e4 c6 2.b4 e5=)

3.Ba3 Nf6 4.Nc3 a5–/+ 5.Qb1? ab4–+ 6.Bb4 c5 7.Bd3 (7.Bc5 Bc5 8.Bc4 Qc7–+). Zamoht – Klaus Behrmann, ChessWorld.net, 2005.

3.Bb2 Na6 4.Ba6 ba6 5.Be5 f6 6.Bc3 d6 7.Nf3 c5 8.bc5 dc5 9.Nh4 g5 10.Qh5 Ke7 11.Ng6 1–0. Wall,Bill – Tomcat, Internet, 2001.

3.Bb2 Qc7 4.Nf3 f6 5.a3 d5 6.ed5 cd5 7.d4 e4 8.Nfd2 Bd6 9.Qh5 Qf7 10.Qf7 Kf7 11.c4 Be6 12.cd5 Bd5 13.Nc3 Be6 14.Nde4 Bf4 15.g3 Bc7 16.Bg2 Nd7 17.Nb5 Bb8 18.Nec3 Ne7 19.Bb7 Nb6 20.Ba8 Na8 21.Ne4 Rd8 22.0–0–0 Nb6 23.Nc5 Bf5 24.Rhe1 Nc4 25.d5 Nd5 26.Nd4 Bc8 (26...Bg4 27.f3 Nde3+–) 27.Nc6 (27...Rd6 28.Nb8+–) 1–0. Wochnik – Schuehler,Ernst, corr 3GMM½–01, 1998.

3.Bb2 d6 (--> 1.b4 e5 2.Bb2 d6 3.e4 c6).

3.Bb2 Bd6 4.a3 Nf6 5.Nc3 0–0 6.Bc4 b5 7.Bb3 Na6 8.Nf3 h6 9.0–0 Bb7 10.Re1 c5 11.Nb5 Be7 12.Be5 d6 13.Bf4 cb4 14.a4 Ne4 15.d3 Nec5 16.Nfd4 Nb3 17.Nb3 Bg5 18.Bd6 Re8 19.Re8 Qe8 20.Nc5 Rc8 21.Nb7 Qd7 22.Na5 Bd8 23.Nc4 Nc5 24.Bc5 Rc5 25.Qd2 Rc4 26.Na7 Bf6 27.Ra2 Bc3 28.Qe3 Rg4 29.Qh3 Qe6 30.g3 Rg3 31.Qg3 Qa2 32.Qb8 Kh7 33.Qb5 Qc2 34.Nc6 b3 35.Qf5 Kg8 36.Ne7 Kf8 37.Qd7 Qd1 1–0. Long_Knights – halo2, ChessWorld.net, 2005.

3.Bb2 Qe7 A) 4.Qg4 Nf6 (4...Nh6 5.Qe2 d6 6.Nf3 f5=) 5.Qf5 Qb4 6.Qe5 Kd8=; B) 4.b5 Nf6 (4...cb5 5.Nc3 b4 6.Nd5 Qd6=; 4...Qb4 5.Be5 d6 6.Bf4 Qe4=) 5.Qe2 cb5 6.Qb5 Ne4=; C) 4.a3 Nf6 (4...a5 5.b5 Nf6 6.Qe2 cb5=; 4...d6 5.Nf3 Nf6 6.Nc3 Nbd7=; 4...d5 5.ed5 cd5 6.Nf3 a5=) 5.Nf3 Ne4 6.Ne5 f6=.

3.Bb2 f6 (--> 1.b4 e5 2.Bb2 f6 3.e4 c6).

3.b5 c5 4.Qh5 (4.Nc3 d6+=) 4...d6 5.a4 (5.Bc4 Qe7+=) 5...g6 (5...Nf6 6.Qe2=+) 6.Qf3 Bg7 7.Bc4 Nf6 8.h4 (8.Nc3 Bg4 9.Qg3 0–0=) 8...h5 (8...0–0 9.h5 Bg4 10.Qg3 Bh5 11.Nc3=+) 9.Nh3 Nbd7 10.Ng5 a6?? (better is 10...0–0=) 11.Nf7+– Qe7 12.Nh8 Bh8 13.Nc3 a5 (13...Nb6 14.Ba2+–) 14.Nd5 (14.Qg3 Ng4+–) 14...Nd5 15.Bd5 (15.ed5 e4 16.Qa3 Nb6+/–) 15...Nb6 16.Bg8 Bd7 17.g4 (better is 17.Qg3 Bg4 18.f3+–) 17...Bg4+/– 18.Qg3 d5 19.ed5 0–0–0 20.Be6 Kb8? 21.Bg4+– hg4 22.Qg4 Rd5 23.Qg6 Nc4 24.Qg8 Qd8 25.Rg1 e4 26.Rb1 Ne5 27.Rg3 Nf3 28.Ke2 Nd4 29.Kd1 Bf6 30.Qf7 Rd7 31.Qh5 b6 32.Rg6 Bh4 33.c3 Nf3+/– 34.Rb2 The mate threat is Rxd2 34...Bf2 35.Kc2 Be1 36.Kb3 Bd2 37.Rg2?? Bc1–+ 38.Rbe2 Rd2 39.Qg4 Qd5 40.c4 Qd3 0–1. IrishBouncer – halo2, ChessWorld.net, 2005.

3.b5 d5 4.bc6 Nc6 5.ed5 Qd5 6.Nc3=.

3.c3 a5 4.b5 (4.Nf3 d5=) 4...Nf6 (4...d5 5.ed5 Qd5 6.bc6 Nc6 7.d3=) 5.Nf3 Ne4 6.Qe2 (6.Ne5 d6 7.Nf3 d5=) 6...d5 7.d3 Nf6 8.Ne5 Be7 9.d4 (9.bc6 Nc6 10.Ba3 Be6=+) 9...0–0=+ 10.Nd2 (10.Qf3 Re8=+) 10...Re8 11.f4 (11.Qe3 Bf5=+) 11...Ng4 (11...Bf5 12.g4 Ng4 13.Kd1–+) 12.Kd1 (12.c4 dc4 13.Qc4 Be6–/+) 12...Nh6 (12...Ne5 13.fe5 cb5 14.Qb5=+) 13.h3 (13.Qh5 Qb6=+) 13...cb5 (13...f6 14.Nef3–/+) 14.Qb5=+ f6 (14...Nf5 15.Ndf3=+) 15.Nef3 Nf5 Black is in command 16.Nb1 (16.Qd3 Ng3 17.Ng5 Nf5= (17...Nh1?? 18.Qh7 Kf8 19.Qh8)) 16...Ng3 17.Rg1 b6 18.Qb2 (18.Ba3 Nf1 19.Qf1 Ba6 20.Be7 Qe7–/+) 18...Nf1 19.Rf1 Nc6 20.Re1 Ba6 (20...Bf5 21.Nbd2–/+) 21.Be3 Rc8 22.g4 (22.Nbd2 Bd3–/+) 22...Qc7 23.Nbd2 Bd3 24.Rc1 (24.Qb3 Nb4! 25.Rc1 b5–/+) 24...a4 (24...b5 25.Qb3 Nb4 26.h4–/+) 25.a3 (25.c4 dc4 26.Nc4 Bb4–/+) 25...Na7 (25...b5 26.h4–/+) 26.g5 Ba3?? (better is 26...fg5 27.fg5 Nb5–/+) 27.Qa3+= Nb5 The pressure on the backward pawn c3 grows 28.Qb4 (28.Qa4 Nc3 29.Rc3 Qc3 30.Nb1 Bb1 31.Qe8 Re8 32.Re2–+) 28...Nc3–/+ 29.Rc3 Qc3 30.Qc3 Rc3 31.gf6? (31.Bf2 Rec8 32.Nf1 Bf1 33.Rf1 Rc1 34.Ke2 R8c2 35.Nd2 Rf1 36.Be3–+) 31…Rec8 (32.Nb3 Bc2 (< 32...Rb3 33.f5–+; < 32...ab3 33.Re2 Be2 34.Ke2–+) 33.Ke2 Bb3–+) 0–1. Zimmermann,Joerg (1700) – Luzuriaga,Norberto Horacio (1700), TT–02.31 TSC, 2002.

3.Bc4 d5 4.ed5 cd5 5.Bb5 Bd7 6.Bd3 (better is 6.Qe2!? e4 7.Bd7 Nd7 8.Qb5–/+) 6...Bb4–+ 7.c3 Be7 8.c4 (better is 8.Be2–+) 8...Bc6 9.Qb3 (9.Nc3 Nf6 10.cd5 Nd5–+) 9...Nd7 (9...dc4 10.Bc4 Bg2 11.Qg3–+) 10.cd5 Nc5 11.Qc4 (11.Qc2 Nf6 12.Be2 Bd5 13.Nf3–+) 11...Bd5 12.Qg4 (12.Qc3 Nd3 13.Qd3 Bg2 14.Qb5 Qd7 15.Qe5 Bh1 16.d4–+) 12...Nd3 13.Kd1 Nf2 14.Ke1 Ng4 15.h3 Bh4 16.Kd1 Ne3! 17.de3 Bg2 18.Ke2 Be4 19.Rh2 Qd3# 0–1. Roseeis – hardgamer, internet, 2006.

3.Bc4 Nf6 4.Nf3 Ne4 5.0–0 –/+.

3.d4 Qh4 4.Qd3 d5 5.ed5 Qd4 6.Qd4 ed4 7.a3=.

3.Qf3 a5 4.Bc4 (4.Bb2 d6=) 4...Qf6 (4...Nf6 5.Bb2 b5=+) 5.Qf6 (better is 5.b5=) 5...Nf6–/+ 6.ba5 (6.Bb2 ab4 7.Be5 Ne4–/+) 6...Ra5 (6...Ne4 7.Bd3 d5 8.Bb2–/+) 7.Nf3 (7.d3 d5 8.Bd2 Rc5 9.ed5 cd5=+) 7...Ne4–/+ 8.0–0 (8.Bb2 f6–/+) 8...f6 (8...d5 9.Be2 Bg4 10.d3–+) 9.d4 (9.Be2 d5–/+) 9...d5 10.Bb3 (10.Bd3 Bd6–/+) 10...Nd7 (10...Bd6 11.Nbd2 Bb4 12.de5 Nd2 13.Bd2 Bd2 14.Nd2 fe5 15.Rfe1–+) 11.Nbd2 (11.c4 ed4 12.cd5 Ndc5–+) 11...Nd2 (better is 11...Bb4!?–+) 12.Bd2=+ e4?? (better is 12...Ra3 13.de5 fe5 14.Ne5 Ne5=+) 13.c4?? (better is 13.Ba5 b6 14.Bd2 ef3 15.Rfe1 Kd8 16.a4+/–) 13…Ra8 (14.Rfe1 Kd8–+; 13...Ra6 14.Rfe1 Kd8 15.Nh4 dc4 16.Bc4–/+) 0–1. caromero – sagaz (2205), net–chess.com, 2006.

3.Qf3 Bb4 4.Qg3 =+.

3.Nf3 Qc7 4.Bc4 (4.Bb2 d6=) 4...d5 5.ed5= Bg4 (5...cd5!? 6.Bd5 Nf6=) 6.h3 (6.a3 cd5 7.Bd5 Nf6+/–) 6...Bh5 (6...Bf3 7.Qf3 Bb4+=) 7.0–0 (7.g4!? Bg6 8.Bb2=) 7...cd5= 8.Bd5 Nf6 9.Bc4?? (better is 9.Nc3=) 9...Qc4–+ 10.Ne5 (10.Re1 e4 11.a3–+) 10...Qd4 (10...Bd1?! 11.Nc4 Bc2 12.Re1 Kd8 13.Ne5–+) 11.Qe1 (11.c3 Qe5 (11...Bd1?! 12.cd4 Bc2 13.Re1–+) 12.g4 Bg6–+) 11...Qa1 12.Bb2 (12.Nc3 Bb4 13.Ng6 Kd7 14.Nh8 Nc6–+) 12...Qa2 (12...Qb2?! 13.Nd3 Kd8 14.Nb2 Bb4 15.Qe5–/+) 13.Nc3 (13.Ng6 Kd7 14.Nf8 Rf8 15.Bf6 Re8–+) 13...Qe6 14.Qe3 Be7 15.Nb5 Na6 16.Ra1 0–0 17.Nd4 Qb6 18.Bc3 Nb4 19.Rb1 a5 20.Nf5 Bc5 21.d4 Bd6 22.Qg5 Bg6 23.Ng6 fg6 24.Re1 gf5 25.Rb1 Qc7 26.Qf5 Qc3 27.Qe6 Kh8 28.Qd6 Qc2 29.Re1 Nd3 30.Rf1 Ne4 31.Qd5 Nef2 32.Qb7 Rac8 33.Qe7 Nh3 (34.Kh1 Rf1 35.Kh2 Qc1 36.Qf7 Rh1 37.Kg3 Qg5 38.Kf3 Rf1 39.Ke2 Re1 40.Kd3 Qe3#) 0–1. donny38 – rla, internet, 2007.

3.Nf3 Bd6 4.b5 Ne7 (4...Bc5 5.Ne5 d6 6.Nd3+/–) 5.bc6 (5.d4!?+=) 5...Nbc6 6.Bb5 (6.Bc4 Bc5=) 6...h6 (6...a6 7.Bc4=) 7.a3 (7.Bb2 a6 8.Bc4 b5=) 7...a6 8.Bc6 (8.Be2 Bc5=) 8...Nc6 (8...dc6 9.0–0=+) 9.Nc3 0–0 10.Nd5 b5 11.d3 Ne7 12.Ne7 Qe7 13.0–0 Bc5 14.Qe2 d6 15.Re1 Bb7 16.h3 (16.a4 f5=+) 16...f6 17.Be3 Be3 18.Qe3 Rfc8 19.Rab1 (better is 19.d4!?=) 19...Rc2–/+ 20.Re2 Rc3 21.Ra1 d5–+ 22.ed5 Bd5 23.Qd2 Ra3 24.Ra3 Qf7?? 25.d4+– Qg6 26.de5 Bc4 27.Re1 Be6 28.ef6 Qf6 29.Rae3 Re8 30.Qa5 Qg6 31.Nd4 Bd5 32.Re8 Kh7 33.g3 Threatening mate. how? 33...Qd3 34.Qb6 Qd2 35.Qc5 Bc4 36.Qe5 Bd3 37.Re7 (37...Qe1 38.Qe1+–) 1–0. andre2004 – halo2, ChessWorld.net, 2005.

3.Nh3 Bb4 4.Qg4 d5 5.Qg7 =+.

3.Nh3 d5 4.Qh5 de4 5.Nc3 (5.Qe5 Qe7 6.Qe7 Be7–/+) 5...Bb4 (5...Qd4 6.Ng5 g6 7.Qe2–/+) 6.Bc4 (better is 6.Qe5 Kf8 7.Ne4 Bh3 8.gh3=+) 6...g6?? (better is 6...Qe7 7.Ne4 g6=+) 7.Qe5+– Be6 (7...Kf8 8.Qh8 b5 9.Rb1+– (9.Qh7?! bc4 10.Rb1 Qe7+–)) 8.Ne4 (better is 8.Qh8 Bc4 9.Qg8 (9.Ne4?! f5 10.Ng3 Qf6 11.Qf6 Nf6+–) 9...Kd7 10.Qd8 Kd8 11.Ne4+–) 8...Nh6 (8...Qe7 9.Qh8 Bh3 10.Qg8 Kd7+–) 9.Be6 (9.Qh8 Kd7 10.Be6 Kc7 11.Qe5 Bd6+–) 9...fe6 (9...Rg8 10.Nf6 Qf6 11.Qf6 fe6 12.Qb2+–) 10.Qh8 Bf8 11.Ba3 Kf7 12.Qh7 Bg7 13.Nhg5 Ke8 14.Qg7 Ng4 15.Rb1 c5 16.Rb7 Nc6 17.Qg8# 1–0. epolhill – chicharones, net–chess.com, 2005.

3.Qh5 Bb4 4.Qe5 Be7=.

3.Qh5 Bd6 4.Bb2 Nf6 5.Qh4 0–0 6.Nf3 b5 (6...Bb4 7.Be5 Be7 8.Qf4=+) 7.a4 Ba6 (7...Na6!? 8.ab5 Nb4+=) 8.ab5+/– Bb5 9.c4 Bc4? (9...Ba6 10.Be5 Be5 11.Ne5 Qe7=) 10.Bc4+– Bb4 11.Be5 Be7 12.0–0 d5 13.ed5 (13.Ng5 Nbd7 14.Bf6 Nf6 15.ed5 cd5+–) 13...cd5 14.Bb5 Nbd7 15.Bd4 Ne4 16.Qh3 Ndc5 17.d3 Nb3 18.de4 de4 19.Bg7 Kg7 20.Ng5?? (20.Qg3 Kh8 21.Qe5 Bf6 22.Qe4 Ba1+– (22...Na1?? 23.Bd3 Qd3 24.Qd3+–)) 20...Bg5?? (20...Na1 21.Qh7 Kf6 22.Ne4 Ke6 23.Qh6 f6 24.Ng5 Kd6+–) 21.Qb3+– Qc7 22.Nc3 a6 (22...Qf4 23.Nd5 Qe5 24.Rfd1+–) 23.Ra6 Ra6 24.Ba6 Rb8 25.Qc4 (25.Qd5 Bf4 26.Qh5 Rb6+–) 25...Qc4 26.Bc4 f5 27.Nd5 Rc8 (28.Bb3 Bf6+–) +–. Taulien,Hans_Juergen – Tiedemann,Joern, remoteschach.de, 2002.

3.Qh5 Qe7 4.Nf3 d5 5.Nc3 Nf6 6.Qe5 de4 +=.

3.Qh5 Nf6 4.Qe5 Qe7 5.Qe7 Be7 6.e5 Nd5 7.a3 d6 8.c4 Nc7 9.Bb2 0–0 10.f4 f5 11.d4 Ne6 12.g3 de5 13.fe5 Nd7 14.d5 cd5 15.cd5 Nd8 16.Bc4 Kh8 17.Nf3 Re8 18.0–0 Nb6 19.Bb3 Nf7 20.d6 Nd6 21.ed6 Bd6 22.Ng5 1–0. Gross – Hasler, corr SOK–97–120 1997.

3.a3 d5

4.Bb2 de4 5.Be5 Nf6 6.Qe2 (6.Nc3 Nbd7 7.Bf4 c5=) 6...Nbd7=+ 7.Bb2 b6 (7...Bd6 8.Nc3 Qe7 9.d3=) 8.d4 (8.Nc3 Qe7=) 8...a5 9.b5 cb5 10.Qb5 (10.Nc3!? Bb7 11.f3=) 10...Ba6–/+ 11.Qg5 (11.Qa4 Bf1 12.Kf1 Bd6=+) 11...h6 12.Qg3 Bf1 13.Kf1 b5 14.Ne2 Qb6 (14...Rc8 15.Nbc3–/+) 15.h3 (15.Kg1 Qd6=+) 15...Bd6 16.Qe3 (16.f4 0–0–/+) 16...0–0 17.g3 (17.Kg1!?–/+) 17...Rfc8–+ 18.c3 Be7 19.Nd2 Qe6 (19...Qc6 20.Kg2–/+) 20.Nf4 Qf5 21.Kg2 Bd6 22.Ne2 Nb6 23.g4 Qh7 24.Ng3 Nbd5–+ 25.Qe1 Bg3 26.Kg3 Nc3 27.Kh2 Ncd5 28.Rc1 Nf4 29.Qe3 Nd3 30.Rc8 Rc8 31.Ba1 Rc2 32.Rd1 Ra2 33.Qg3 Qg6 34.d5 Nd5 35.Qb8 Kh7 36.Qb5 Qg5 37.Ne4 Qf4 38.Kg1 Nf2 39.Ng5 hg5 40.Qb1 Kg8 41.Qa2 Qg3 42.Kf1 Nd1 43.Bd4 0–1. SuperForte – REXChess 80286, 1994.

4.Bd3 de4 5.Be4 Nf6 6.Qe2 =+.

4.Bd3 Nf6 5.ed5 cd5 6.c4 (6.Nf3 Bd6=+) 6...e4 7.Be2 d4 (7...dc4!? 8.Bc4 Qd4–/+) 8.d3= Bf5 (8...a5 9.de4 Ne4 10.Bf3=) 9.Bg5 (9.de4 Be4 10.f3 Bg6=) 9...h6 10.Bf6 (10.de4 Be4 11.Bf6 Qf6=) 10...Qf6 11.de4 Be4 12.Bf3 Bf3 (12...Qe7 13.Qe2 Bc6 14.b5 Bf3 15.Nf3+=) 13.Nf3 Attacks the isolani on d4 (13.Qf3 Qe6 14.Ne2 Nc6=) 13...d3 14.0–0?? (better is 14.Nbd2 Qe7 15.Kf1=) 14...Qa1–+ 15.Qd3 Nc6 16.Re1 (16.Nc3 Qa3 17.Qe4 Be7 18.Nb5–/+) 16...Ne7?? (better is 16...Be7–+) 17.Nc3+– Qa3?? (better is 17...Qe1 18.Ne1 Rd8+/–) 18.Qe3 (better is 18.Ne5 Rd8 19.Nd5 Rd5 20.Qa3 Re5 21.Re5+–) 18...Qb4 19.Nd5 Qd6 20.Nd4 Kd8 21.Nb5 Qd7 22.Nbc7?? Rc8 23.Qa7 Nd5 24.Re8 Kc7 25.Qa5 Kb8 26.Rc8 Kc8 27.Qa8 Kc7 28.Qa5 Nb6 29.Kf1 Qd1 (30.Qe1 Qe1 31.Ke1 Bc5–+; 29...Qd3 30.Ke1 Bb4 31.Qb4 Re8 32.Qe7 Re7#) 0–1. worldplayer (1695) – bgage (1800), net–chess.com, 2006.

4.d4 de4 5.Bb2 (5.de5 Qd1 6.Kd1 a5=+) 5...ed4–/+ 6.Bd4 (6.Qd4 Qd4 7.Bd4 Ne7–/+) 6...Bf5 (6...a5 7.Qd2–/+) 7.Bc4 (7.Nc3 a5 8.b5 Nf6=+) 7...b5 8.Bb3 Bg6 (8...a5 9.c3–/+) 9.Ne2 Qc7 (9...a5 10.c3–/+) 10.0–0 (10.Nd2 a5=+) 10...Nd7 (10...a5 11.Nd2=+) 11.Ng3 (11.c4 bc4 12.Bc4 Ngf6=+) 11...Ngf6 12.Re1 Be7 (12...Bd6 13.c4=+) 13.Nc3 e4 seems the pivot of the position (13.Nd2 Bd6=) 13...0–0 (13...Qf4 14.Qe2=) 14.Nce4 Rad8 (15.Qe2 Ne4 16.Ne4 Rfe8=; 14...a5 15.Qd2=). worldplayer (1695) – grahamtrue (2060), net–chess.com, 2006.

4.ed5 cd5

5.Bb2 Nc6 6.Bb5 e4 7.Qe2 a6 8.Bc6 bc6 9.d3 Qg5 10.g3 a5 11.Nf3 Qh6 12.b5 Rb8 13.de4 de4 14.Qe4 Qe6 15.Qe6 fe6 16.Bc3 cb5 17.0–0 a4 18.Re1 Ne7 19.Nd4 Kf7 20.Nd2 Nd5 21.Bb2 Be7 22.Nc6 Rb6 23.Ne5 Kg8 24.Ne4 Bf6 25.Rab1 h5 26.f4 Be5 27.Be5 h4 28.g4 Kh7 29.Ng5 Kg6 30.h3 Rf8 31.Re4 Bb7 32.Rb2 b4 33.Rd4 Kh6 34.Kf2 Rc8 35.Ke1 Ba8 36.Rd2 Rf8 37.Rf2 Rc8 38.Rd2 Rf8 39.Re2 Nf4 40.Bf4 Rf4 41.Ne6 Rc4 42.Rb4 Rbb4 43.ab4 a3 44.g5 Kg6 45.c3 Rc3 46.Kd2 a2 47.Re1 Rc4 48.Nf8 Kf5 49.Ra1 Rf4 50.Kc3 Bd5 51.g6 Kg5 52.Rd1 Bg8 0–1. Baer,Werner – Woelfelschneider,Peter, THT7.26, 2001.

5.Bb2 d4 6.Bb5 Nd7 (6...Nc6!?=) 7.Qe2+= a6 (Better is 7...Qe7!?+=) 8.Qe5+– Qe7 9.Qe7 Ne7 10.Be2 Nb6 (10...a5 11.b5+–) 11.Nf3 Nf5 12.0–0 Na4 13.Bd4 Nd4 14.Nd4 Bd6 15.Bf3 Be5 16.Re1 f6 17.Nc6! Bd7 18.Ne5 fe5 19.Bb7 Ra7 20.Re5 Kd8 21.Be4 Rc7 22.Ra2 Nb6 23.d3 Ba4 24.c3 Bb3 25.Rb2 Bd1 26.h3 Re8 27.Re8 Ke8 28.Bh7 g5 29.Be4 Nd7 30.c4 Ne5 31.Nc3 g4 32.Nd1 gh3 33.gh3 Rg7 34.Kf1 Rg5 35.f4 Nc4 36.fg5 Ne3 37.Ne3 (37...Kf8 38.Bb7+–) 1–0. Taulien,Hans_Juergen – Taulien,Christian, Demoturnier remoteschach.de, 2002.

5.d4 Bd6 6.Nf3 Bg4 7.Bb5 Nc6 8.h3 Bf3 9.Qf3=.

5.d4 e4 6.c4 Nf6 7.Nc3 Be7 8.Bg5 Nbd7 9.c5 0–0 10.Nge2 h6 11.Be3 Nb8 12.Nf4 Qd7 13.Be2 b6 14.0–0 bc5 15.bc5 Ba6 16.Ba6 Na6 17.f3 Rad8 18.fe4 de4 19.Qe1 Rb8 20.Qg3 Nc7 21.Rab1 Nb5 22.Rb5 Rb5 23.Nb5 Qb5 24.Nd5! Nd5 25.Bh6 The mate threat is Qxg7 25...Qf1?? 26.Kf1+– Bf6 27.Bg5 Bd4 28.Qd6 Ne3 29.Ke2 Nc2 30.Be7 Ra8 31.Qd5 Rb8 32.Bd6 Rb2 33.Qa8 Kh7 Do you see the mate threat? 34.Qe4 Kg8 35.Kd3 f6 36.c6 Bb6 37.Bc5! Na3 38.Qe6 Kh8 39.Ba3 (39...Rb1 40.Bd6+–) 1–0. Luehrig,Walter – Luzuriaga,Norberto Horacio, Orang–Utan Invitational, 2002.

5.Nf3 Nc6 6.d4 (6.b5 e4 7.bc6 ef3 8.Qf3 bc6=) 6...e4 7.Ne5 Be7 (7...Bd6 8.Bb5 Nge7 9.Bg5 Be5 10.de5=+) 8.Bb5 (not finished). Kucharkowski,Jens – Davila,Jose, Orang Utan Invitational, 2002.

3.a3 Nf6

4.Bb2 d6 5.Nc3 Be7 6.Nf3 Nbd7=.

4.Bb2 Ne4 5.Qe2 d5 6.d3 Nf6=.

4.Qe2 a5 5.Nf3 ab4=+ 6.Ne5 Be7 7.Nd3 0–0=+ 8.Bb2 ba3 The passed pawn on a3 quickly leads to threats 9.e5 Nd5 10.Na3 d6 11.Nc4 Ra1 12.Ba1 Re8 13.Qf3 Nd7 14.Be2 de5 15.Nde5 Ne5 16.Be5 b5 17.Ne3 Bb4 18.Bd4 Bd2 19.Kd2 Nf6 20.c3 c5 21.Rd1 cd4–+ 22.Kc2 Qa5 23.Rd4–/+ Qa2 24.Kc1 Be6 25.Bd3 Rc8 26.Nd1 Bb3 27.Qf5 Qa1 28.Bb1 Do you see the mate threat? 28...Qa6 29.Bc2 Be6 30.Qd3 Qa5 31.Ne3 h6 32.Kd2 Re8 33.f4 Kf8 34.Rb4 Attacks the isolani on b5 Bd7 35.Nd5 Qa1 36.Rb1 Qa6 37.Nc7 The pressure on the isolated pawn grows 37...Ne4 38.Qe4 Qd6 39.Qd4 Qc7 40.Re1 Rd8 41.Qb4 Kg8 42.Kc1 Be6 43.Re5 Bc4 44.Qe7 Threatening mate... how? 44...Qb8 45.Re3 Qa8 46.Be4 Bd5 47.Bb1 Bg2 48.h3 Bd5 49.Kb2 Rc8 50.Qe5 Qc6 51.Rg3 g6 52.f5 Re8 53.Qd4 b4 (54.Qb4 Qc7–+; 53...Re2 54.Kc1 Re1 55.Kb2–+) 0–1. Baer,Werner – Luzuriaga,Norberto Horacio, TT–02 TSC, 2002.

4.Qe2 d6 5.Bb2=.

4.Nf3 d5 5.ed5 e4=.

4.Nf3 Ne4 5.Qe2 Nf6 6.Qe5 Be7 7.Bd3 0–0 8.0–0 Re8=.

3.Bb2 Bb4

4.Be5 Nf6

5.c3 Ba5 6.Bd6 Bc7 7.Bg3 Bg3–/+ 8.hg3 Qe7 9.f3 d5 10.d3 Na6 11.Nd2 b6 12.Qa4 Bb7 13.d4=+ Nc7 14.e5= Nd7 15.Bd3 h6 16.Ne2 0–0 17.Kf2 a5 18.Rh5 Rfc8 19.Rah1 Kf8 20.Nf4 Ke8 21.e6 fe6 22.Ng6 Qd6 23.f4 Nf6 24.Qd1? Kd8 25.Ne5 Qf8 26.R5h3=+ Nce8 27.Bg6 Kc7 28.Qb3 Ba6 29.Rb1 b5 30.a4 Rcb8 31.Bd3 b4= 32.c4 g5 33.Rc1 gf4=+ 34.cd5 fg3 Opening the f–file gets Black a lot of play 35.Kg1 Nd5 36.Rc6 Kd8 37.Ne4 Bd3–/+ 38.Nd3 Qe7?? (39.Nec5 Nd6=+; 38...Nf4 39.Nf4 Qf4 40.Qe6 Qe3 41.Kf1 Qd4 42.Ng3 Qd1 43.Qe1 Qd3 44.Ne2 Qf5 45.Kg1 Nf6=+). Blaszczak,Jan – Gugulski,Marcin, corr 2. AMM Poland, 1994.

5.c3 Ba5 6.Qf3 0–0 7.Bf6 Qf6 8.Qf6 gf6 9.Na3 d5 (9...Re8 10.0–0–0–/+) 10.ed5+= cd5 11.Ne2 Bg4 (11...Rd8 12.0–0–0+=) 12.h3 (12.Nc2 Nc6+=) 12...Be2 (12...Bd7 13.Nc2+=) 13.Be2= Re8 14.Rb1 b6 (14...Bb6!?=) 15.Nb5+/– Re7 16.Nd4 Nd7 17.0–0 Nc5 18.Bg4 Ree8 (18...Ne4 19.Rfd1+/–) 19.Rfe1 Ne4 (19...a6 20.g3+/–) 20.Re2 Kg7 (20...Kf8 21.Bd7 Re5 22.Nc6 Nc3 23.Re5 (worse is 23.Ne5 Ne2 24.Kf1 fe5 25.Ke2 Ke7+=) 23...Nb1 24.Rd5+–) 21.Bd7 Re7?? (better is 21...Red8 22.Bc6 Rac8+/–) 22.Nf5+– Kf8 23.Ne7 Ke7 24.Bc6 Kd6 (24...Rd8 25.Rb5 Kf8 26.Rd5 Rd5 27.Bd5 Nc5+–) 25.Ba8 (25.Ba8 Nc5 26.Re8+–) 1–0. pierre – szczesny, internet, 2009.

5.c3 Be7 6.d4=.

5.c3 Be7 6.Bf6 Bf6 7.d4 d6 8.Nf3 0–0 9.Bd3 Bg4 10.0–0 Nd7 11.Nbd2 Qc7 12.Rb1 Rfe8 13.Qc2 h6 14.Ne1 c5 15.h3 Bh5 16.Qb3 cd4 17.cd4 Bd4 18.Qd5 (Worse is18.Qb7 Qb7 19.Rb7 Nc5–/+) 18...Qc3 19.Qh5 (Worse is19.Rb7 Nf6 20.Qc4 Ne4 21.Ne4 Qc4 22.Bc4 Re4=+) 19...Qd2 20.Rb7 Nc5 (20...Bf2 21.Rf2 Qe1 22.Rf1 Qe3 23.Kh2=) 21.Bc4 (21.Qf7 Kh8 22.e5 Bf2 23.Kh2 Qg5 24.Rf2 Nb7+– (24...Qe5? 25.g3+–)) 21...Kh8 (21...Nb7 22.Bf7 Kf8 23.Bd5=) 22.Rf7= (22.Bf7? Bf2 (22...Nb7 23.Be8 Bf2 24.Rf2 Qe1 25.Rf1 Qe4 26.Rf8 Kh7 27.Bg6 Qg6 28.Qg6 Kg6 29.Ra8+–) 23.Kh2 Re5–+ (23...Nb7?! 24.Be8 Qf4 25.Kh1–/+; 23...Be1 24.Be8 Bf2 25.Rf7+–)) 22...Ne4 (22...Re4? 23.Nf3 Qc2 24.Bd5+– (24.Nd4?! Rd4 25.Rg7 Kg7 26.Qf7 Kh8 27.Qf6 Kh7 28.Qd4 Rd8+–)) 23.Qg6 Qg5 24.Qg5 Ng5 25.Rd7 Red8 26.Rd8 Rd8 27.Bd5 Rd7 (27...Rb8 28.Nd3=) 28.Nd3+= g6 29.Re1 Kg7 30.Kf1 a5 31.g3 h5 32.Re8 Nh7 33.Rg8 Kh6 34.Nf4 Rg7 35.Rd8 Bc5 36.Ne6 Re7 37.Nc5 dc5 38.Ra8 Nf6 39.Bb3 Ne4 40.Ra5 Nd2 41.Kg2 Nb3 42.ab3 Rb7 43.Rc5 Rb3 44.h4 Kg7 45.Rc6 Kf7 46.Ra6 Rc3 47.Ra2 Kf6 48.f3 Kf5 49.Ra5 Kf6 50.g4 hg4 51.fg4 Rc4 52.Kf3 Rc3 53.Kf4 Rc4 54.Kg3 ½–½. Krasny,Henryk Jan – Benussi,Alberto, TKM/SF/01, 2001.

5.Qf3 Be7 6.Bb8 Rb8 7.e5 Nd5 8.Bc4 d6 9.Bd5 cd5 10.Qd5 0–0 11.f4 de5 12.Qd8= Rd8 13.fe5 The passed pawn on d2 quickly leads to threats 13...Rd5 14.Ne2 Re5=+ 15.d4 Re3 16.Kf2 Bg5 17.h4 Bg4 18.Nbc3 Bh6 19.Rhe1 Rc8 20.Nd5 Ree8 21.Nec3 Be6 22.Rad1 Kf8 23.Kg1 Red8–/+ Black gets in control 24.Re5 g5! 25.Rf1 Rc6 26.Nb4 Rc3 27.Re6 Bg7 28.hg5 Rd4 29.Nd3 Rc2 30.Re3 Ra2 31.Nf4 Rd6 32.Ne6 Kg8 33.Ng7 Rdd2 Threatening mate... how? 34.Rf6 Rg2 35.Kf1 Rh2 Do you see the mate threat? 36.Kg1 Rag2 37.Kf1 Rb2 The mate threat is Rh1 38.Kg1 Rbg2?? 39.Kf1 Kg7 40.Re7 Rg5 Black begins to deal mighty blows 41.Ref7 Kh8 42.Rb7 a5 43.Ra7 Kg8 44.Re6 Rf5 45.Ke1 Rf7 46.Re8 Kg7 47.Rea8 Ra2 (48.Ra5 Ra5 49.Ra5 h6–+; 47...Rh5 48.Ra5 Ra5 49.Ra5–/+) 0–1. Rushton,Darren – Luzuriaga,Norberto Horacio, TT–01 TSC, 2002.

3.Bb2 d5

4.ed5 Qd5 A) 5.Qe2 A1) 5...f6 6.Nc3 (6.a3= Ne7 7.Nc3 Qd8 8.Rd1=) 6...Qd8 7.f4 Nd7 8.Nf3=; A2) 5...Bd6 6.f4 f6 7.fe5 fe5 8.Nc3+=; A3) 5...Nd7 6.Nf3 (6.b5 Ngf6 7.Nf3 Bd6 8.Nc3=) 6...Bd6 7.a3 Ngf6 8.d4=; B) 5.Nc3 B1) 5...Qd6 6.Qe2 (6.a3 Nf6 7.Nf3 Bg4 8.h3=; 6.b5 a6 7.bc6 Nc6 8.Nf3=) 6...Nf6 7.Nf3 Qb4 8.Qe5=; B2) 5...Qe6 6.a3 (6.b5 Nf6 7.Nf3 Bd6 8.Bd3+=) 6...Nf6 7.Nf3 Bd6 8.Qe2=; C) 5.a3 Nf6 6.Nf3 (6.Nc3 Qd8 7.Qe2 Bd6 8.Ne4=; 6.Qe2 Bd6 7.f4 Bg4 8.Nf3=; 6.c4 Qe6 7.Nf3 Nbd7 8.Qe2=) 6...Bd6 7.Ne5 Be5 8.Qe2+=.

4.ed5 Bb4

5.Qe2 f6 6.f4 (6.a3 Be7 7.dc6 Nc6 8.Nf3 +=.

5.Qe2 Nf6 Qd5 7.fe5= Qe6 8.Nh3=) 6.Qe5 Be7 7.d6 (7.dc6 Nc6 8.Qf4 0–0=; 7.Qg3 Qd5 8.Qg7=) 7...Qd6 8.Qd6 Bd6 9.Bf6 gf6 10.Nc3 0–0 (10...Kd8 11.Nf3=) 11.d4 Re8 12.Kd2 c5 (12...Bf4 13.Kd1=) 13.dc5 (13.d5 Bf4 14.Kd1 Be5+=) 13...Bf4 (13...Bc5 14.Rd1=) 14.Kd1 Nd7 15.Nge2 Bc7 16.Nd5 Be5 17.Rc1 (17.Rb1 Nc5 18.f4 Rd8=) 17...Nc5 18.f4 Rd8 19.c4 Bd6 20.Rc2 (20.Kd2!?=) 20...Bf5–/+ 21.g3 Bf8 22.Nd4 Be4 23.Bg2 Bc2 24.Kc2 Rd6 25.Rd1 Ra6 26.Kb2 Rd8 27.Bf3 Na4 28.Kb1 Rd5 29.cd5 Nc3 30.Kb2 Nd1 31.Bd1 Ba3 32.Kb1 Rb6–/+ 33.Bb3 a5 34.Kc2 a4! 35.Bc4 Bc5 36.Nf5+= Kf8 37.h3 Rb4 38.Kc3 b5 39.Bd3 a3 40.Bc2 Rb2 41.Bb3 Rf2 42.h4 Rf3 43.Kc2 Bb4 44.d6 Rc3 45.Kb1 Ke8 46.h5 Rc5 47.Bc2 Bd2 48.h6 b4 49.Nd4 Kd7 50.Ne2 Rh5 51.Bh7 Rh6 52.Bd3 Rh2 53.Kc2 Be1 54.Bc4 Bg3 55.Kb3 Be1 56.Nd4 Rb2 57.Ka4 Bg3 58.Bb3 Bf4 59.Kb4 Bd6 60.Kc4 Rh2 0–1. Wallner,Josef (2330) – Luzuriaga,Norberto Horacio (2375), corr ICCF WSTT/3/06/4, 2006.

5.Be5 Qe7 6.Qe2 f6 7.Bc3 Bd6 8.dc6 +=.

5.Be5 f6 6.Bb8 (6.Bc3 Qe7 7.Be2 cd5 8.Nf3+=; 6.a3 Bc5 7.Bb8 Rb8 8.d4+=) 6...Rb8 7.dc6 bc6 8.Bc4 +=.

5.Be5 Nf6 6.a3 Be7= 7.dc6 Nc6 8.Bb5=.

5.Be5 Nf6 6.c3 Bd6 7.dc6 Nc6?? 8.Nf3?? (8.Bd6 Qd6 9.Nf3 0–0=) 8...0–0?? (8...Ne5 9.Ne5 Be5 10.d4–+) 9.Be2?? (9.Bd6 Qd6 10.Be2 Re8=) 9...Bg4 10.0–0?? Re8?? 11.d4 Rc8 12.Bd3?? Ne7?? 13.h3 Bh5 14.Re1 Ned5 15.Nbd2 Nc3= 16.Qb3 Qc7?? 17.Kh1 Bf3= 18.Nf3 Ncd5 19.Qc3?? b6 20.Qc6?? h6 21.Kh2 Qb8 22.a4 Qa8 23.Qc4?? Qb7 24.Qc2?? g6 25.Kg1?? Qe7 26.Kh2?? Nf4 (27.Bc4 Be5 28.de5 N6d5+=; Better is 26...Rc2 27.Bc2 Bb4–+) +=. Hemzo,Miguel Angelo – Luzuriaga,Norberto Horacio, Orang Utan Invitational, 2002.

5.Be5 Nf6 6.c3 Bd6 7.dc6 Be5 8.cb7 Bb7 9.Nf3 –+.

5.Be5 Nf6 6.c3 Bd6 7.Bd6 Qd6 8.dc6 Nc6 9.Nf3 0–0 10.Be2 Bg4 11.0–0 Rfe8 12.d4 Rac8 13.Bd3 (13.Nbd2 Nd5 14.Rc1 Nf4=) 13...Ne7 14.h3 Bh5 15.Re1 Ned5 16.Re8 Re8 17.Nbd2 Nc3 18.Qb3 Qc7 19.Kh1 Bf3 20.Nf3 Ncd5 21.Ne5 Re7 22.Rc1?? (22.Bc4 Nb6=) 22...Qd8 23.Qc3?? Re8 24.Qb4?? b6 25.Qa4 a5 26.Qc6 h6 27.Kh2 Qb8 28.a4 Rd8 29.Kg1 Qa8 30.Qc4 Qb7 31.Nc6 Rd6 32.Qc2 g6 33.Ne5 Kg7 34.Kh2 Nf4= 35.f3 ½–½. Hemzo,Miguel Angelo – Luzuriaga,Norberto Horacio, corr OUI, 2002.

3.Bb2 Nf6

4.a3 d6 5.Nc3 Be7 6.Nf3 0–0=.

4.a3 Ne4 5.Qe2 d5 6.d3 Nf6 7.Be5 Be6 8.Nf3 a5 9.b5 Bd6 (9...cb5 10.Nd4=+) 10.d4 0–0 11.Qd3 (11.Bd6 Qd6 12.Qe5 Qd7=+) 11...Ne4 12.Be2 cb5 13.Qb5 Nc6 14.0–0 Re8 15.Bd6 Nd6 16.Qb2 Bg4 17.c3 Qc7 18.h3 (18.Ne5 Be2 19.Qe2 f6–+) 18...Bh5 19.a4 Ne4 (19...Bf3 20.Bf3 Nc4 21.Qb5=) 20.Bd1 Rac8 21.Nbd2 Nd6 22.Rc1 f6 23.Bb3 Bf7 24.c4 Nb4 25.cd5= Qd7 26.Rc8 Qc8 27.Rc1 Qd7 28.Qc3 Rc8 29.Qa1 Nd3 30.Rc3 Nf4 31.Rc8 Qc8 32.Qa3 Qc1 33.Qc1 Ne2 34.Kf1 Nc1 35.Nc4 Nb3 36.Nd6 Bd5 37.Ke2 Bc6 38.Ke3 Ba4 39.d5 b6 40.Nd4 Nd4 41.Kd4 Bb3 42.Nc8 b5 43.Na7 Bc4 44.Kc5 Kf8 45.Nb5=+ Bb5?? 46.Kb5+/– Ke7 47.Ka5 Kd6 48.Kb4 Kd5 49.Kc3 Ke4 50.Kd2 f5 ½–½. Taulien,Hans_Juergen – Baumann,Heinz, remoteschach.de, 2002.

4.Be5 d5 5.ed5 Bb4 6.c3 Bd6 7.Bd6 Qd6 8.dc6 0–0 (8...Nc6 9.Nf3=) 9.Be2 (9.cb7!? Bb7 10.Ne2+=) 9...Nc6= 10.Nf3 Bg4 11.0–0 Rad8 12.d4 Rfe8 13.Nbd2 Nd5 14.Rc1 Qa3 15.Bc4 Nc3 16.Qc2 Ne2 17.Be2 Re2 18.Ng5 g6 (worse is 18...Nd4 19.Qh7 Kf8 20.Rc7+–; 18...Rd4 19.Qh7 Kf8 20.Nde4+/–) 19.Qc4 Qe7 20.Ndf3 Bf3 21.Nf3 Qe6 22.a4 Re4 23.Qe6 Re6 (23...fe6 24.Rfd1+=) 24.Rfd1= Red6 25.Rc4 a6 26.Kf1 h6 27.h3 g5 28.g4 b5 29.ab5 ab5 30.Rc5 b4 31.Rc4 Rb8 32.Nd2 Rb6 (worse is 32...Nd4 33.Ne4 Rdd8 34.Rcd4 Rd4 35.Rd4+–) 33.Nb3 Ne7 ½–½. Jansen,Joop HEP (2405) – Flores Gutierrez,Carlos (2490), ICCF Rochade, 2005. (=1.e4 c6 2.b4 e5 3.Bb2 Nf6 4.Be5)

4.Nf3 Bb4 5.Ne5 Qe7 6.Qe2 0–0=.

4.Nf3 Ne4 5.Be5 d5 6.Qe2 Nd7=.

4.Be5 Bb4

5.c3 Be7 6.d4 d5 7.ed5 cd5 8.Bd3 Nc6 9.Nf3 Ne5 10.Ne5 0–0 11.0–0 Qc7 12.Qc2 Bd6 13.f4 Be6 14.Nd2 Rfc8 15.Rf3 Bb4 16.Rc1 Be7 17.g4! Ba3 18.Re1 Ng4 19.Bh7 Kh8 20.f5! Ne5 21.Re5 Bd7 22.Rh3! (22.f6!? gf6 23.Rh5 Bg4 24.Bg8! Kg8 25.Qh7 Kf8 26.Qh8 Ke7 27.Qf6 Ke8! 28.Rh8 Kd7 29.Qf7 Kc6 30.Rh6 Bd6 31.Rd6 Qd6 32.Rf6 Rg8! 33.Rd6 Kd6 34.Kh1 Raf8 35.Qh7) 22...Qd6? 23.Nf3 f6 24.Re6 Be6?! 25.fe6 Qc6 26.Nh4 g5 27.Bg8! Rc7 28.Qg6! g4 29.Bf7! Bc1 30.Nf5 gh3 31.Qg7# 1–0. Labahn,Wolfgang – COMP, 1' 1990 (Labahn).

5.c3 Be7 6.d4 d5 7.Bf6!? Bf6 8.e5 Be7 9.Bd3 c5! 10.Ne2 c4? (10...Nc6) 11.Bc2 Nc6 12.0–0 0–0 13.f4 f6 14.Nd2 fe5 15.de5!? Qb6 16.Kh1 Bf5 17.Rb1 Bc2 18.Qc2 Qc7 19.Nf3 Qd7 20.Nfd4 b6 21.Rf3 Rac8 22.Rh3 g6 23.Nc6 (23.Rf1 Ne5!) 23...Qc6 24.Nd4 Qe8?! 25.Rf1 Bc5 26.Qd1! Qd7 27.e6 Qg7 28.f5 Qf6 29.Rhf3 Qe5 30.f6! Bd6 31.f7 Kh8 32.Rh3 Rc5? 33.Qd2 Rfc8? 34.Rff3 Ra5? 35.Rh7!! Kh7 36.Rh3 Qh5 (36...Kg7 37.Qh6 Kf6 38.Rf3 Ke7 39.Nc6 Ke6 40.Qg6 Kd7 41.Ne5 Be5 42.Qf5) 37.Rh5 gh5 38.Nf5 Kg6 39.Nd6 1–0. Labahn,Wolfgang – COMP, 4' 1990 (Labahn).

5.Qf3 d5 6.ed5 Qe7 7.Qe2 0–0 (7...cd5 8.Bf6 Qe2 9.Ne2 gf6 10.Nf4=) 8.c3 (8.Bb8!? Rb8 9.a3+=) 8...Bd6=+ 9.Bg3 (9.Nf3 Nd5 10.Bd6 Qd6=+) 9...Qe2 (9...Nd5 10.Qe7 Be7 11.Bb8 Rb8 12.d4–/+) 10.Be2 Bg3 11.hg3 cd5 12.Na3 Nc6 13.Nb5 a6 14.Nd6 Rd8 15.Nc8 Rac8 16.Nf3 d4 17.cd4 Nd4 18.Nd4 Rd4 19.Rh4 Rd7 20.Kd1 Re8 21.Rc1 Rde7 22.Bd3 g6 23.a4 Rd7 24.Bb1 h5 25.f3 Rde7=+ 26.Ba2 Re1 27.Kc2 R1e2 28.Kd3 Rg2 29.Rc7 Rd8 30.Ke3 Rdd2 31.Bf7+= Kg7 32.Bc4 Kh6 33.Rb7= Nd5 34.Ke4 Nc3 35.Ke3 Nd1 36.Ke4 Rg1 37.Ke5 Rg3 38.Ke4 Kg5–/+ 39.Rh1 Rd8 40.f4 Kh6 41.Rd1 Rd1 42.Ra7? Re1 43.Kd5 Rg4 44.Ra6 Rf4 45.Bd3 Rg4 46.Bb5 Rg2 47.Kd4 h4 48.Ra8 Rd1 49.Ke3 Rg3 50.Kf4 g5 51.Ke4 h3 (52.a5 g4–+) 0–1. Taulien,Hans_Juergen – Tiedemann,Joern, remoteschach.de, 2002.

5.Nf3 d6 6.Bf6 gf6 7.c3 Ba5 8.Bc4 +=.

5.Nf3 d6 6.Bf6 Qf6 =+.

5.Qf3 Be7

6.Bb8 Rb8 7.e5 Nd5 8.Bc4 Qc7 9.d4=.

6.Bb8 Rb8 7.e5 Nd5 8.Bc4 d6 =+.

6.Bb8 Rb8 7.e5 Ng8 8.Qg3 g6 9.e6 d6 10.ef7 Kf7 11.Bc4 Kg7 12.Ne2 Nf6 13.0–0 b5 14.Bb3 Bg4 15.Nd4 Qd7 16.f3 c5?? (Better is 16...Bf5!?=) 17.fg4+= cd4 18.g5 Nd5 19.Nc3! dc3 20.Bd5 Qc8?? 21.Rf7 Kg8 22.Qf3 Qc5 23.Kh1 Qd5 24.Qd5 (24...Bg5 25.Ra7 Kf8 26.Qf7#; 24.Re7 Qf3 25.gf3 Kf8 26.Ra7 h6+/–) 1–0. Taulien,Hans_Juergen – Tiedemann,Joern, remoteschach.de, 2002.

6.Nc3 d6 7.Bd4 0–0 8.Rb1 Nbd7 9.Be2 Re8 10.Nh3 b5 11.0–0 b4 12.Bf6 Nf6 13.Rb4 d5 14.Ra4 d4 15.e5 dc3 16.ef6 Bf6 17.dc3 Bh3 18.gh3 Qc7 19.Bd3 Be5 (< 19...Bc3 20.Be4 Re4 21.Re4+/–) 20.Be4 Re6 21.Ra6 Rc8 22.Bf5 Rf6 23.Qe4 Rd8 24.Bh7 Kh8 25.Bf5 g6 26.Bg4 Bc3 27.Bf3 Rdd6 28.Ra3 Bd4 29.Qh4 Kg7 30.Re1 Rd8 31.Kg2 Rf4 32.Qg3 Be5 33.Rae3 Bd6 34.R3e2 Rc4 35.Qg5 Bb4 36.Rb1 a5 37.h4 f6 38.Qg3 Bd6 39.Qh3 Rc5 40.Rd1 f5 41.h5 g5 42.Re6 Kf7=+ 43.Rg6 Bf4?? 44.Bc6!+/– a4 45.Qa3 Rc6 46.Rd8 Qd8 47.Rc6 Qd5 48.Qf3 Qf3 49.Kf3 Bh2 50.Ra6 g4 51.Kg2 Bb8 52.Ra4 f4 53.Rc4 Be5 54.a4 Bb8 55.a5 (55...Ke6 56.Ra4+–) 1–0. Taulien,Hans_Juergen – Tiedemann,Joern, remoteschach.de, 2002.

6.Bc4 d6 7.Bd4 Bg4 +/–.

4.Be5 Ne4

5.a3=.

5.Qe2 d5 6.Nc3 Qe7 7.Ne4 Qe5 8.Nc5 Qe2 9.Ne2 –/+.

5.Qe2 Qe7?? 6.Bd4?? d5=+ 7.d3 Nd6 8.Qe7 Ke7 9.Nf3 f6 10.Nbd2 Kf7 11.a3 Be6 12.g3 Nd7 13.Nb3 Re8=+ 14.Kd2 b6 15.Be2 Nb5 16.Bb2 c5 17.a4 Nc7 18.bc5 bc5 19.Nh4 d4 20.Na5 Rb8 21.Rhb1 Rb6 22.Nc4=+ Bc4 23.dc4 g6 24.f4 Bg7 25.f5 Re8 26.Ng2 Bh6 Black begins to deal mighty blows 27.Nf4 Reb8 28.fg6 hg6 29.Kc1 Ne6 30.c3 Bf4 31.gf4 Nf4 32.Bf1 d3 (33.Ra2 Ne5–+) 0–1. Kleindl – Labahn,Wolfgang, corr SOK–88–28, 1988.

5.Qe2 Qe7 6.Bd4 f6 7.Nc3 d5 8.Ne4 Qe4 9.Bc3 Qe2 10.Be2 Bd6 11.Nf3 0–0 12.0–0 Nd7 13.Nd4 Nb6 14.a4 Bd7 15.a5 Nc4 16.Rfe1 Rae8 17.d3 Ne5 18.f4 Nf7 19.g3 Re3 20.Bf3 Rfe8 21.Re3 Re3 22.Kf2 a6?? 23.Ke3 1–0. Wynia – Miraglia, email CTON 1996.

5.Qe2 Qe7 6.Qe4 d6 7.Nf3 Nd7 8.d4 de5 9.de5 Qb4 10.Nbd2 Nb6 11.Bd3 Be6 12.0–0 Rd8 13.Qe3 Bc5 14.a3 Qa5 15.Qg5 0–0 16.Qh4 h6 17.Qe4 g6 18.Qh4 h5 19.Qg5 Rfe8 20.Bg6 fg6 21.Qg6 Kf8 22.Qh6 Kg8 23.Ne4 Nd5? 24.Rad1?? Bf8? 25.Qg6 Bg7 26.Nf6 Nf6 27.ef6 Qc7 28.Ng5 Bc4 29.Rd3! Bd3 30.f7 Kf8 31.Nh7 (31...Ke7 32.Qg7+– (< 32.fe8Q Re8 33.Qg7 Kd8 34.Qd4 Qd7 35.Qd7 Kd7 36.cd3 Re2+–; < 32.fe8R Re8 33.Qg7 Kd8 34.Qd4 Qd7 35.Qd7 Kd7 36.cd3 Re5+–)) 1–0. Woelfelschneider,Peter (1795) – Meier,Franz, 06. VCC–Open, 2001.

3.c3 d5+=

4.Bd3 Nf6 5.Nf3 de4 6.Bc4? ef3 7.Qf3 Be7 8.Qg3 0–0 9.d3 Bf5 10.Bh6 Bg6 11.Bg5 Nbd7 12.0–0 a5 13.Nd2 ab4 14.cb4 Bb4 15.Ne4 Be7 16.Rad1 Be4 17.de4 Ne4 18.Qb3 Bg5 19.Qb7 Nec5 20.Qc6 Rc8 21.Qf3 Qf6 22.Qd5 Nb6 23.Qf3 Qf3 24.gf3 Nc4 25.Rc1 Nd2 26.Rfd1 Nf3 27.Kg2 Bc1 28.Rc1 e4 29.Rc4 Nd2 30.Rc2 Rfd8 31.Kg3 Rd3 32.Kf4 Nb1 33.h4 Nc3 34.a3 Rf3 35.Ke5 Nd3 36.Kd6 Rf2 37.Rf2 Nf2 38.Kd7 Ra8 39.a4 Ra4 40.h5 e3 41.h6 gh6 42.Kd6 e2 43.Kc5 h5 44.Kc6 e1Q 45.Kc5 Qe5 46.Kb6 Qb5 47.Kc7 Rd4 (48.Kc8 Qc6 49.Kb8 Rd8 50.Ka7 Ra8#; 47...Ra7 48.Kd6 Nfe4#) 0–1. chrisman – rtoma (1820), net–chess.com, 2001.

4.ed5 cd5 5.Bb5 (5.Nf3 e4 6.Nd4 Nf6=) 5...Bd7+= 6.Bd7 (6.Bd7 Nd7 7.d4+=; 6.Qe2 Bd6+=) 6…Nd7 +=. Aannevik,Bjarne – Akman,Ozgur, corr ICCF WSTT/3/06/1, 2006.

4.ed5 Qd5 5.Qe2+= Ne7 6.c4 Qe6=.

4.Qe2 de4 5.Qe4 Bd6+= 6.d4 Nf6 +=.

3.c3 Nf6

4.Bd3 d5–/+ 5.f3 de4–+ 6.Be4 Ne4 7.fe4 Qh4 8.Kf1 Qe4 9.Nf3 Bg4 10.Kf2 Bd6 11.d3 Qf5 12.Qe2 0–0 13.Nbd2 Nd7 14.Ne4 Bc7 15.Be3 Bf3 16.gf3 Nf6 17.Ng3 Qe6 18.Rag1 Bb6 19.Bb6 ab6 20.a3 Ra3 21.Qd2 Ra2 (22.Qe2 Rfa8–+) 0–1. Breite – Pommerel,Wim, CiF, 1988.

4.d4=.

4.Nf3 Ne4 5.Qe2 d5 6.d3 Nf6 7.Ne5 Be7=+ 8.g3 0–0 9.Bg2 Re8 10.0–0 Bd6 11.d4 Qc7 12.f4=+ b6 13.Qc2 c5 14.Qb3 Be6 15.bc5 bc5 16.Ba3 Nbd7 17.f5 Ne5 18.de5+= c4?? 19.Qb5?? Bd7?? 20.Bd6?? Bb5?? 21.Bc7+– Ng4 22.Re1 Bd7 23.Bd5 Bf5 24.Ba8 Ra8 25.h3 Nh6 26.g4 Bd3 27.Na3 f6 28.e6 Kf8 29.e7 Ke8 30.Nb5 Bg6 31.Bd8 Rd8 32.ed8Q Kd8 33.Na7 Nf7 34.Nc6 Kd7 35.Nd4 Nd6 36.Nf5 Bf5 37.gf5 Nf5 38.Re4 Nd6 39.Rd1 Kc6 40.Re6 g5 41.Rdd6 Kc5 42.Rf6 g4 43.hg4 h6 44.a4 h5 45.Ra6 Kd5+– 46.Rf5 Ke4 47.Rh5 Kd3 48.Rh3 Kc2 49.Rb6 Kd2 50.Kf2 Kc2 51.g5 (51...Kd2 52.Rb4+–) 1–0. zggenev – Long_Knights, ChessWorld.net, 2005.

3.d4 Bb4

4.c3 Bd6 5.Nf3 ed4!? 6.e5 Qe7=.

4.c3= Bd6 5.Nf3 Qe7 6.Bd3 ed4 7.cd4 Bb4 8.Nbd2 Nf6 9.0–0 d5 10.e5 Nfd7 11.a3 Bc3 12.Ra2 Ba5 13.Nb3 Bc7 14.Bg5 Qf8 15.Qc2 h6= 16.Bh4 g5 17.Bg3 Bd8 18.e6 fe6= 19.Bg6 Ke7 20.Nc5 Ba5 21.Rb2 b6 22.Nb3 Ba6 23.Rfb1 Bb5 24.Na5 ba5 25.a4 Ba6 26.Ne5 (26...Ne5 27.Be5+– (27.de5?! Bc4+=)) 1–0. Ritter,Fredi (1700) – Munkwitz,Wolfgang (1700), TSC, 2003.

4.c3 Bd6 5.Nf3 f6 6.de5+= Be5 7.Ne5+/– fe5 8.Bc4 Nf6= 9.0–0 b5 10.Be2 0–0 11.Nd2 a5 12.c4 b4 13.a3 Bb7 14.ab4+= c5 15.bc5 Be4?? 16.Ne4+– Ne4 17.Bd3 Nf6= 18.Re1 Nc6 19.g3 Qe7=+ 20.f4 Qc5 21.Be3 Qe7 22.Bf5 e4 23.h4 Rfb8 24.Rb1 Nb4 25.c5? Nd3–+ 26.Re2 Rb1 27.Qb1 Nd5?? 28.Bd4?? N5b4?? 29.h5 Ra6 30.Rh2?? Nc6?? 31.g4?? Nd4–+ 32.Qb8 Kf7 33.Bh7 Nf3 Threatening mate. how? 34.Kg2 Nh2 35.Qg8 Kf6 36.Bf5 Ng4 37.Qh7 Nf4 38.Kg3 g6 39.Qe7 Ke7 40.Kf4 gf5 41.Kf5 Nf2 (42.Ke5 Rh6–+; better is 41...e3 42.Kg4 e2 43.Kf5–+) 0–1. KaiKerling – halo2, ChessWorld.net, 2005.

3.d4 d5

4.de5 Bb4 5.c3 Ba5 6.ed5 cd5 7.Nf3 Ne7 8.Bd3 Nbc6 9.0–0 0–0 10.Re1 h6 11.Ba3 Re8 12.Qc2 Bg4 13.Nbd2 d4 14.Bb2 Nd5=+ 15.c4 Nf4 16.Bh7=+ Kh8 17.Be4 Bf3 18.Nf3 Be1 19.Re1–+ Ne5 20.Ne5 Re5 (21.g3 Nh3 22.Kf1 Ng5–+) 0–1. Rosner,Dirk (1700) – Luzuriaga,Norberto Horacio (1700), TT–01 TSC, 2002.

4.ed5 Qd5 5.Nc3 Qd4 6.Bd2 Bb4 7.Qf3 Nf6 8.a3 Bg4 9.Qg3?? Ne4 10.Rd1 Bc3 11.Nf3 Bd2 12.Rd2 Qa1 13.Ke2 Ng3 14.fg3 e4 15.Rd4 Qd4 16.h3 ef3 17.gf3 0–0 18.fg4 Re8 (19.Kf3 Re3 20.Kg2 Qd2 21.Kg1 Rg3 22.Bg2 Qg2#) 0–1. rpoff – cursed, net–chess.com, 2001.

4.ed5 Qd5 5.Nf3!? ed4 6.Qe2 Be6 7.a3 –/+.

3.Nf3 Bb4

4.c3 Bd6 5.d4 ed4 6.Qd4=.

4.Ne5 d6 5.a3 (5.Nd3 Ba5=) 5...Ba5 (5...de5 6.ab4 Qd4 7.Nc3=) 6.Nc4 Bc7 7.Bb2 (7.Qf3 Nf6=) 7...Nf6 8.Ne3 (8.Qf3 Nbd7=) 8...0–0 (8...Nbd7 9.Nc3=) 9.Nc3 (9.Qf3 Nbd7 10.d4 Ba5 11.Nd2 Re8=+) 9...d5 (9...Re8 10.Bd3=+) 10.ed5 cd5 11.Nb5 Bb6 12.c3 (12.Nd4 Nc6 13.Nc6 bc6=+) 12...Nc6–/+ 13.Be2 Be6 (13...a6 14.Nd4–/+) 14.0–0 Ne4 (14...a6 15.Nd4 Nd4 16.cd4–/+) 15.Rb1 (15.f3 Nf6=+) 15...Re8 (15...a6 16.Nd4–/+) 16.f3 (16.Bc1 a6 17.d3 d4 18.de4 A) 18...ab5?! 19.cd4 Nd4 20.Bb5 Nb5 21.Qd8 Red8 22.Rb5 Be3 23.Be3= (23.fe3? Bc4 24.Rc5 Bf1 25.Kf1 f6–+); B) 18...de3–/+) 16...Nc3 (16...Nf6 17.Re1–/+) 17.Nc3=+ Bf5 (17...d4 18.Na4 Rb8 19.Nb6 Qb6 20.Ba1=) 18.Bb5 d4 19.Nf5 dc3 20.Kh1 cb2 21.Rb2 Qf6 22.Qb1 (22.Bc6 bc6 23.Qc2 Re5=+) 22...Rad8 23.Bc4 (23.Rc1 Re5 24.Ng3 Qf4=+) 23...g6 (23...Na5 24.Bb5 Re5 25.Ng3=+) 24.Ng3=+ Kg7 25.d3 Qd6 (25...Qe7 26.a4=+) 26.Ne4 (26.a4 Qa3=+) 26...Qd4 (26...Qa3!? 27.Rc1 Nd4–/+) 27.Qa1 Na5 (27...f6 28.Rc1=+) 28.g4 (28.Bb5 Re6=+) 28...Re7 29.Ba2 (29.Rb5 Qa1 30.Ra1 Rd4=+) 29...Nc6–/+ 30.f4 Ba5 (30...f6 31.g5 f5 32.Ng3=+) 31.Rb3=+ Qa1 32.Ra1 Bb6 33.f5 Red7 34.Rf1 White intends f6 (34.f6 Kf8=+) 34...Ne5–/+ Attacks the isolani on d3 (worse 34...Rd3 35.Rd3 Rd3 36.fg6 Kg6 37.Rf6 Kg7 38.Rf7 Kg6 39.Rb7+=) 35.g5 White prepares the advance f6 35...Rd3 (35...gf5 36.Rf5 Nd3 37.Rb1–/+) 36.Rd3 (36.f6 Kf8=+) 36...Rd3 (worse 36...Nd3 37.fg6 Kg6 38.Rf6 Kg7 39.Rf7 Kg6 40.Rf6 Kg7 41.Nd6+=) 37.f6 Kf8 38.Rb1 (38.Rc1 Ke8=+) 38...Rd4 (38...Ra3 39.Bd5–/+) 39.Rc1=+ Ke8 40.Bb1 Kd7 (40...Kd8 41.Kg2–/+) 41.Kg2 a6 (41...Nc4 42.Rc3=+) 42.Re1 Ba7 43.Nf2 Bb8 44.Ne4 (44.Be4 b5–/+) 44...b5 (44...Bd6 45.Nd6 Kd6 46.h3–/+) 45.Re2 (45.Nc5 Kd8 46.Be4 Rd2 47.Kh3 Nc4–/+) 45...Kc6 46.Ba2 Kb6 (46...a5 47.Kf1–/+) 47.h3 (47.Re3!?–/+) 47...Nd3 48.Re3 Bf4 49.Rd3 Rd3 (49...Re4 50.Kf3 (50.Bf7?! Bg5 51.Bg8 Rf4=) 50...Rc4 51.h4+– (worse 51.Bc4 bc4 52.Rd4 Bg5 53.Rc4 h6+–)) 50.Bf7 Rd8 (50...Ra3 51.Bg6 Ra2 52.Kf3+–) 51.Bb3 a5 (51...Ka5 52.Nc5 Rb8 53.Nd7–+) 52.a4–/+ Be5 53.ab5 (53.Kf2 ba4 54.Ba4 Rd4–/+) 53...Kb5 54.Be6 (54.f7 a4 55.Bd5 a3–+) 54...a4–+ 55.Kf3 a3 56.Ke2 (56.Ke3 Bd4 57.Ke2 Kb4–+) 56...Kc6 (56...Kb4 57.Ke3–+) 57.Ke3 (57.f7 Bg7–+) 57...Rb8 58.Nd2 (58.f7 Bg7 59.Kd3 Rb2–+) 58...Bd6 (58...h6 59.f7 Bg7 60.Bb3–+) 59.Ne4 Rb2 60.Nc3 Bb4 (60...Be5 61.f7 Bg7 62.Ke4–+) 61.f7 Bf8 62.Bc4 0–1. Chiron 2 64_bit 4CPU – Equinox 3?20 64_bit 4CPU, CCRL, 2014.

4.Ne5 Qe7 5.Bb2 f6 6.a3 Bd6 7.Nf3 Qe4 8.Be2 Ne7=.

4.Ne5 Qe7 5.Bb2 Nf6 6.Bd3 (6.Qe2!?=) 6...0–0 (6...d6 7.Nf3–/+) 7.0–0 d6 8.Nc4 Nbd7 9.c3 (9.Re1 Re8 10.e5 Bc5=+) 9...Bc5–/+ 10.a4 (10.Bc2 Qe6 11.Nba3–/+) 10...d5 (better is 10...Re8!?–/+) 11.e5? (better is 11.ed5!? cd5 12.Re1=) 11…Ne5–/+ (12.Ne5 Qe5 13.Bh7 Kh7–/+) 0–1. blammey – pokerpig (2140), net–chess.com, 2006.

3.Nf3 d5

4.a3?? de4 5.Ne5 Nd7 +=.

4.a3?? Nf6 5.Ne5 (5.Bb2 de4 6.Ne5 Nbd7+=) 5...Ne4+= 6.d4 (6.Nf3 a5 7.d3 Nf6+=) 6...Nd7 7.Nd2 Qe7 8.Ne4 Ne5 (worse is 8...de4 9.Nc4=) 9.Nd6 Qd6 10.Qe2 Bf5 11.de5 Qe6 12.g3 a5 13.b5 Bc5 14.Bb2 Qg6 15.Qd2 0–0–/+ 16.Bg2 Be4 17.f3 Bf5 18.g4 Bd7 19.0–0–0 Rfc8 20.Kb1 cb5 21.Qd5 Rc7 22.Bf1 Qb6 23.Qe4 Bc6–/+ 24.Qf5 b4 25.a4 b3 26.cb3 Qb3 27.Rd3 Qb4 28.Be2 Ba4 29.Rc1 Rc6 30.Qe4 Qe4 31.fe4 Bb4 32.Rd4 Rc1 (32...Rc1 33.Bc1 Bc6–+) 0–1. Straka,Jozef – Jakubcin,Milos, 23. Slovakia Championship Preliminary, 2009.

4.Nc3 Nf6 5.Ne5 Bb4 6.ed5 0–0 –/+.

4.ed5 Bb4 5.Ne5 Qd5=.

4.ed5 e4 5.Nd4 cd5 6.Bb5 Bd7 7.Bd7 Nd7 8.Nc3 (8.c3 Bd6=) 8...Bb4 (8...Qg5=+) 9.a3? (better is 9.Nd5 Ne5 10.Ne6 Bd2 11.Bd2 fe6 12.Qh5 Ng6 13.Ne3=) 9...Bc3–/+ 10.dc3 Ngf6 11.Bg5 0–0 12.Nf5 Re8 13.0–0 Re5 14.Bf6 Qf6 (< 14...gf6 15.Qg4 Kf8 16.Qg7 Ke8 17.Nd6 Ke7 18.Nf7= (18.Nb7? Qc7–+)) 15.Ne3 Nb6 (better is 15...Qc6–+) 16.Ng4= Qg5 17.Ne5 Qe5 18.Qd2 (18.Qd4!? Qf4 19.f3=) 18...Rc8=+ 19.a4 Rc3 20.Ra2 (20.Rfd1 Nc4 21.Qd5 Qd5 22.Rd5 Kf8=) 20...h6 21.Rb1 Rc5 22.g3 Qc7 23.a5 Nc4 24.Qb4 Na5 25.Rbb2 b6 26.c3 Rc3 27.Ra3?? Ra3 28.Qa3 Nc4 29.Qc3 a5 30.Rb5 Qc6 31.Rb1 b5 32.h4 b4 33.Qc2 Qb5 34.Qe2 a4 35.Qg4 a3 36.Qd1?? Nb2 37.Qb3 Qd3 38.Qd3 Nd3 39.Kf1 a2 40.Ke2 ab1Q 41.Ke3 Qe1 42.Kd4–+ b3 43.Kd5 b2 44.g4 b1Q 45.g5 Qb5 46.Kd6 Qeb4 47.Kc7 Qe7 48.Kc8 Qbb7 (48...Qed7) 0–1. andre2004 – Long_Knights, ChessWorld.net, 2005.

4.ed5 e4 5.Nd4 Qd5!? 6.Bb2 Bb4 –/+.

4.ed5 e4 5.Qe2 cd5 6.Ba3 (6.Nd4!?=+) 6...Nc6 (6...Bd6 7.Nd4 Nf6 8.b5–/+) 7.c3 (7.b5!? Nb4 8.Nd4–+) 7...Nge7–+ 8.Nd4 Nd4 9.cd4 Nc6 10.Qd1 (10.Qe3 Qf6 11.Nc3 Be6–+) 10...Nd4 (10...Bd6 11.Nc3 0–0 12.Nd5–+) 11.Nc3 (11.Bb2 Ne6–+) 11...Be6 12.Bb5 (12.d3 Qb6 13.Rc1 f5–+) 12...Nb5 13.Nb5 Qb6 14.Nc3 (14.Qe2 a6 15.Nc3 Rc8–+ (< 15...Bb4 16.Bb4 Qb4 17.Rb1–+)) 14...Qa6 15.Bb2 Bb4 16.Qb3 Bc3 17.Bc3 (17.Qc3 f6 18.Qa3–+) 17...d4! 18.Qb4 (18.Bd4 Qc4 (18...Bb3)) 18...dc3 19.Qc3 (19.dc3 Rd8 20.a4 Qd3 21.Qb5 Ke7 22.Qd3 Rd3–+) 19...0–0 20.Qe5 (20.f4–+) 20...Bg4 21.f3 ef3 (22.Kf2 Rfe8–+) 0–1. Vauban – hardgamer, internet, 2006.

4.ed5 e4 5.Qe2 Qd5 6.Nc3 Qe6 7.Ne4 Bb4 +=.

3.Qh5 Qc7

4.Bb2 Bb4 5.Be5 Nf6 6.Bf6 gf6 7.c3 +=.

4.Bb2 d6=.

4.Nf3 d5 5.ed5 e4 6.Qe5 Qe7 +=.

4.Nf3 d6 5.Nc3 Be7 6.Ng1 Nf6 +=.

4.Nf3 Nf6 5.Qe5 Qe5 6.Ne5 Ne4=.

3.Qh5 d6

4.Bc4 Qc7 5.Qe2 f5 6.Bg8 Rg8=.

4.Bc4 Qd7 5.Qe2 Nf6 6.Bb2 Be7 7.d4 ed4 8.Bd4 0–0 =+.

4.Bc4 Qe7 5.Qe2 b5 6.Bb3 a5=.

4.Bc4 g6 5.Qe2 b5 6.Bd3 a5 7.g4? (better is 7.ba5!? Qg5 8.Qf3=) 7...ab4–+ 8.f3 (8.Bb2 Nf6 9.f3 Bh6–+) 8...h5 9.c4 (9.gh5 Rh5 10.Bb2 Be7–+) 9...bc3! 10.dc3 Nf6 11.f4? Ba6?? 12.h3? hg4–+ 13.fe5 de5 14.a3 gh3 15.Ra2 b4 16.Nh3?? Bd3 17.Qe3 Be4 18.Rhh2 Ng4 19.Qe4 Qh4 20.Kf1 Nh2 21.Rh2 Qe4 22.Nd2 Qf5 23.Kg1 Rh3 24.Rg2 Bc5 25.Rf2 Qf2 0–1. Boison,Roland Kojo – Laba,Solange, corr AA–S–07 ICCF, 2006. (=1.e4 c6 2.b4 e5)

2.e4 e6

3.a3 a5 4.b5 d5 5.ed5 ed5 6.d4 (6.Nf3 Nf6=) 6...Bd6 7.Be2 (7.Bd3 Nf6=) 7...Nf6+= 8.Nf3 Qe7 (8...0–0 9.0–0=) 9.0–0 0–0 10.bc6 bc6 (10...Nc6 11.Nc3=) 11.Nc3 (11.Re1 Re8=) 11...Bf5 (11...Ne4 12.Ne4 de4 13.Nd2=) 12.Re1 Ne4 (12...Qc7 13.Bd3 Bd3 14.Qd3=) 13.Ne4 Be4 (13...de4 14.Bd3=) 14.Qd2 (14.Ng5 Bg6=) 14...Qc7 15.h3 Nd7 16.Ng5 Nf6 17.Ne4 Ne4 18.Qd3 Rab8 (18...Rfe8 19.Rb1=) 19.Be3 (19.c4 Rfe8=) 19...Rb2 (19...Rfe8 20.Rab1+=) 20.f3 (20.Bf3 f5=) 20...Ng3 21.Bd1 (21.Qc3 Rfb8+=) 21...Re8 22.c4 dc4 (22...dc4 23.Qc3 Rbb8+=). Psion – Psion, 4 Min/Zug, 1990.

3.Ba3 d5=.

3.Ba3 Nf6 4.e5 Nd5 5.Qg4 f5 6.Qg3 b5 7.Nc3 a5 8.Nd5 ed5 9.Be2 Qe7 10.Nf3 Na6 11.0–0 Qf7 12.Ng5 Qg6 13.Qh4 h5 14.Nh3 Be7 15.Nf4 Qg5 16.Qg5 Bg5 17.Nh5 ab4 18.Bb2 0–0 19.a4 ba3 20.Ba3 Re8 21.d4 Bd2 22.Rad1 Bb4 23.Bb2 Bb7 24.Bd3 Rf8 25.c3 Be7 26.Nf4 Kh7 27.g4 g6 28.gf5 gf5 29.Bc2 Rf7 30.Rd3 Rg8 31.Ng2 Rgg7 32.Rf3 Rg5 33.Bc1 Rh5 34.Rg3 Rg7 35.Bd1 Rh4 36.Nh4 Bh4 37.Rg7 Kg7 38.Bc2 Kg6 39.Be3 Nc7 40.Kh1 Ne6 41.Rg1 Kf7 42.Bf5 Ke8 43.Rg8 Kf7 44.Rb8 Ba6 45.Be6 Ke6 46.Re8 Kf7 47.Ra8 Bb7 48.Ra7 Bc8 49.Rc7 Ba6 50.Rd7 Ke8 51.Rc7 Kd8 52.Rc6 Bb7 53.Rc5 Kd7 54.Rb5 Bc6 55.Ra5 Be7 56.f4 Bd8 57.Ra7 Ke6 58.Ra6 Kd7 59.f5 Be7 60.f6 Bb7 61.Ra7 Bf6 62.Rb7 Ke6 63.Rb6 Kf5 64.ef6 Kg6 65.Kg2 Kf7 66.h4 Kg6 67.Bg5 Kf7 68.Rb7 Kg8 69.f7 Kf8 70.Bh6# 1–0. Green Light Chess v2.15c – Butcher111, 2001.

3.Bb2 a5 4.b5 d5 5.ed5 cd5 6.Nf3 Nf6 7.Be2 Bd6 8.a4 0–0 9.0–0 Nbd7 10.d4 Re8 11.Nbd2 e5 12.de5 Ne5 13.Ne5 (13...Be5 14.Be5 Re5 15.Nf3=; 13.Be5 Be5 14.Ne5 Re5=). Brukske – ball, internet, 2006.

3.Bb2 d5 4.Bd3 de4 5.Be4 Nf6 6.Bf6 Qf6 7.d4 Bb4 8.c3 Qf4 9.Qc2 f5 10.cb4 Qe4 11.Qe4 fe4 12.Nc3 0–0 13.Ne4 a5 14.ba5 Nd7 15.Nf3 Ra5 16.Ned2 e5 17.Nc4 Rd5 18.Ne3 Ra5 19.Nc4 Rd5 20.Ne3 Ra5 21.Nc4 ½–½. Bestia02c – Gromit220, computer chess game, 2000.

3.Nc3 Bb4 4.Qg4 –/+.

3.Nc3 b5 4.d4 a5 5.ba5=+ Qa5 6.Bd2 Bb4 7.Qb1?? Bc3–+ 8.Nf3 Bd2 9.Nd2 Ba6 10.c4 bc4 11.Qc2 Bb5 12.Bc4 Bc4 13.Qc4 Ne7 14.Rd1 0–0 15.0–0 Qa2 16.Qd3 d5 17.Ra1 Qa1 18.Ra1 Ra1 (19.Nb1 Nd7–+) 0–1. Stoot – Tricky Rabbitt, ChessWorld.net, 2005.

3.a3 d5

4.e5 Nd7 5.d4 a5 6.b5 c5 7.c3 1–0. Kruimer,Wim – Behnke,Denny, TSC, 2002.

4.e5 a5

5.ba5 Qa5 6.Nf3=.

5.ba5 c5 6.Nc3 Nc6 7.Nf3 g5 8.h3+= Bg7 9.Bb5 Nge7 10.0–0 0–0= 11.Ng5 Ne5 12.Qh5 h6 13.Nf3 N5g6 14.Rb1= Ra5 15.Ne2 Nf5 16.d4 b6 17.a4 Bd7 18.dc5+= bc5 19.Bd2 Ra4 20.Ba4 Ba4 21.Rfc1 Re8 22.Nf4 Nf4 23.Bf4 Qd7 24.Ne5 Qc7 25.Nd3 Qe7+= 26.c3 c4 27.Ne5 Ra8 28.Re1 Qc7 29.Ra1+/– Ra6 30.Ra2 Bb5 31.Ra6 Ba6 32.g4 Nd6 33.Bh6 Bh6 34.Qh6 Ne4 35.Nf3 Qb6 36.Qh4+– Kg7 37.Ng5 Nf6 38.Qg3 Bc8 39.h4 Qd8 40.h5 Kg8 41.Qf4 Qe7 42.h6 Nh7 43.Nf3 f6 44.Qb8 Qe8 45.Ra1 Bd7 46.Qb7 Qe7 47.Ra8 Nf8 48.g5 Qf7 49.Qb8 e5 50.Qf8! Qf8 51.h7! Kh7 52.Rf8 Bg4 53.Rf7 Kg8 54.Rf6 Bf3 55.Rf3 Kg7 56.Rf5 d4 57.Re5 dc3 58.Re4 Kf7 59.Rc4 Kg6 60.f4 Kf5 61.Rc3 Kg6 62.Rc6 Kf7 63.Rb6 Kg7 64.f5 Kf8 65.Rb7 Kg8 66.f6 Kf8 67.g6 Ke8 68.g7 Kd8 69.g8R# (69.g8Q#) 1–0. jaskier (2135) – halocan (1625), internet, 2007.

5.b5 Qb6 6.Nc3 Bc5 7.Qe2 Bd4 8.Nf3 Bc3 9.dc3 Qc7 10.Rb1 Nd7 11.c4 dc4 12.Nd2 cb5 13.Rb5 c3 14.Nc4 Ne7 15.Nd6 Kf8 16.Qh5 Ng6 17.a4 Kg8 18.Ba3 Nge5 19.Re5 g6 20.Qh6 b6 21.Re3 Bb7 22.Bc4 Nc5 23.Bc5 bc5 24.Re6 Qd7 25.Qe3 1–0. Woelfelschneider – Kagel, Tiger SC 1999.

5.b5 Qb6 6.Nc3 Bd7 7.Rb1 +=.

5.b5 Qb6 6.Nc3 f6 7.d4 Nd7 8.f4 c5= 9.Be3 Qc7 10.Nf3 Nh6 11.Bd3 cd4 12.Bd4+= Bc5 13.b6 Qb6 14.Na4+/– ½–½. Labahn,Wolfgang – Lehmann,K (2315), Berliner Sommer 8th, 1990.

2.e4 Nf6

3.d3 e5

4.a3 a5 5.ba5 Qa5 6.Qd2 Bb4 7.c3 Be7 8.Bb2 d5 9.ed5 cd5 (9...Nd5?! 10.c4 Nf4 11.Qa5 Ra5 12.Bc3+=) 10.Nf3 Nc6 11.c4 d4 12.Qa5 Ra5 13.Nbd2 0–0 14.Be2 Bf5 15.0–0 Rfa8 16.Rfb1 h6 17.h3 Ba3 18.Ba3 Ra3 19.Ra3 Ra3 20.Rb7 Bd3 21.Bd3 Rd3 22.Rc7 Nb4 23.Re7 (23.Rb7 Nc2 24.Rb8 Kh7+=) 23...Nc6 (23...e4!? 24.Ne4 Kf8–/+) 24.Rc7+= Na5 25.Re7 (better is 25.Ra7!?=) 25...e4!–/+ 26.Ne4 Kf8 (worse is 26...Nc4 27.Nf6 gf6 28.Re4=) 27.Ra7 Nc4 (27...Rd1 28.Kh2 Ne4 29.Ra8 Ke7 30.Ra7 Kd8 31.Ra5 d3–/+) 28.Nf6= gf6 29.Kf1 Ne5 (better is 29...Rd1!? 30.Ke2 Nb2=) 30.Ke2+= Rb3 31.Ra8 Kg7 32.Nd4 Rb2 33.Ke3 Nc4 34.Kf3 Nd2 35.Ke3 ½–½. Kleist,Werner – Schenk,Dieter (1870), Bad Sooden Allendorf Senior op, 2004.

4.c3 a5 5.ba5 d5=+ 6.Bg5 de4–/+ 7.Bf6 Qf6 8.de4 Ra5 9.Nf3 Be7 10.Be2 0–0 11.0–0 Qg6 12.Qc2 Bh3 Do you see the mate threat? 13.Ne1 Nd7 14.Nd2 Rfa8 15.Kh1 Be6 16.c4 Bb4 17.Nb3 Ra3 18.Nd3 Be7 19.f3 b5 20.Nf2 Nb6 21.Nd2 b4 22.Nb3 Qg5 23.Rfd1 Na4 24.Rd3 Nc3 25.Rc3 bc3 26.Qc3 Ra2 27.Ra2 Ra2 28.Kg1 Re2 (29.Ng4 Bg4 30.fg4 Qg4–+) 0–1. Tanuki – Mario Cruz (1875), internet, 2005.

4.c3 d5 5.Nf3 =+.

3.e5 Nd5

4.a3 d6 5.c4 Nb6 6.Bb2 de5 7.Be5 Bf5 8.Nf3 N8d7 9.Bc3 e6 10.d4 Nf6 11.Nbd2 Be7 12.Be2 0–0 13.0–0 Qc7 14.Ne5 Rfd8 15.Qb3 Nbd7 16.f4 Bd6 17.Rad1 a5 18.c5 Be7 (19.ba5 Nd5=). Guido,Angel Pablo (1950) – Rosner,Dirk (1930), CiF, 2005.

4.a3 d6 5.c4 Nc7 6.Bb2 (6.ed6 ed6 7.Nf3 d5=) 6...Bf5 (6...de5 7.Be5 Nd7 8.Bc3=) 7.Nf3 Nd7 (7...de5 8.Ne5 f6 9.Nf3=) 8.ed6 ed6 9.Be2 d5 (9...Be7 10.Nd4 Bg6 11.Nc3=) 10.0–0+= Nf6 (10...dc4 11.Bc4 Ne6 12.Re1+=) 11.Re1 (11.Nd4 Bg6+=) 11...Be7 12.d4 (12.Nd4 Bg6+=) 12...0–0 (12...dc4 13.Bc4 0–0 14.Nc3=) 13.Nc3 (13.c5 Re8=) 13...h6 (13...Re8 14.c5=) 14.c5 Re8 15.Ne5 Ne6 16.Bh5 (16.b5 Qc7=) 16...Rf8 (16...Nh5 17.Qh5 g6= (worse is 17...Nd4 18.Nf7 Qd7 19.Ne5+/–)) 17.g4 (better is 17.Bf3!?=) 17...Bh7+= 18.Nf7 (18.Bc1 Qc7+=) 18...Rf7–/+ 19.Re6 (19.Bf7 Kf7 20.Ra2 Qd7–/+) 19...Nh5 (19...g6!? 20.Bg6 Bg6 21.Qe2–+) 20.gh5–/+ Bh4 21.Bc1? (better is 21.f3–+) 21...Bf2 22.Kh1 Qh4 23.Be3 Raf8 24.Qe2 Be3 25.Qe3 Rf3 26.Qg1 Rc3 (26...Rc3 27.Rae1 Bf5–+) 0–1. Euler,K – Schnabel,H, Bad Zwesten, 1997.

4.a3 d6 5.d4 a5 6.b5 Nc7=.

2.Nf3 a5

3.b5 (--> 1.b4 a5 2.b5 c6 3.Nf3).

3.ba5 Qa5

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

4.Nc3 d5 5.Bb2 (5.e4 e6=) 5...Nf6=+ 6.g3 (6.e3!?=+) 6...Nbd7–/+ 7.Bg2 e5 8.0–0 Bd6 9.a4 0–0 10.Ba3 (10.d4 e4 11.Nd2 Qc7–/+) 10...Ba3–+ 11.Ra3 e4 12.Ne1 Ne5 13.Ra1 Bf5 14.h4 (14.e3 Bg4 15.Qc1 Nc4–+) 14...h5 (14...Nc4 15.e3–+) 15.Kh2 (15.e3 Rfd8–+) 15...Nc4 16.Qc1 (16.Nb1 Qc5 17.Qc1 b5–+) 16...d4 (better is 16...Bg4–+) 17.Nd1? (17.Nb1–+) 17...Nd2 18.Rh1 (18.Rg1–+) 18...Ng4 19.Kg1 Nb3! 20.cb3 Qe1 21.Bf1 e3 22.fe3 (22.f3 Qg3 23.Bg2–+) 22...Qg3 23.Bg2 Be4 (24.Kf1 Bg2 25.Kg1 Bh3) 0–1. C_Artist_Think – smurilo (1670), chessHere.com, 2006.

4.Nc3 Nf6 5.e3 d5 6.Be2 Bf5 7.Bb2 Nbd7 8.0–0 e5 9.d4 e4 10.Nh4 Bg6 11.f3 Bd6 12.fe4 Ne4 13.Ng6? (better is 13.Ne4 Be4 14.Nf5 Bf5 15.Rf5+=) 13...hg6–+ 14.Ne4 Bh2 15.Kf2 de4 16.g3? (better is 16.Bc4–+) 16...Qg5 17.g4 (17.Ke1 Qe3 18.Qc1 Bg3 19.Kd1 Qc1 20.Bc1–+) 17...Qh4 18.Kg2 Qg3 19.Kh1 Bg1 0–1. Krul,Lukas – Ptosek,Jan (1780), Ostrava Konik op–B, 2007.

4.e3 e5 5.Be2 d6 6.0–0 Be7 7.c4 Be6 8.Qc2 (8.d3 Nf6 9.Ng5 Bd7 10.Qb3 Qc7 11.Bb2 Na6 12.d4 h6=) 8...Nd7 (8...Nf6 9.Ng5 0–0 10.Ne6 fe6 11.Qb3 Qa6 12.d4 Nbd7=) 9.Bb2 (9.d4 Ngf6 10.Ng5 ed4 11.Ne6 fe6 12.ed4 0–0=) 9...h6 (9...Ngf6 10.d4 0–0 11.Nbd2 ed4 12.Nb3 Qf5=) 10.d4 Ngf6 11.Nbd2 0–0 12.Nb3 (12.Rfb1 Qc7=) 12...Qc7 13.a4 g6 14.Bd3 Kh7 15.Nh4 (better is 15.a5!?+=) 15...e4+= 16.Be4? (better is 16.Be2+=) 16...Ne4–+ 17.Ng6 fg6 (worse is 17...Kg6 18.Qe4 Kh5 19.d5 cd5 20.cd5+/–) 18.Qe4 Bc4 19.Nd2? (19.Qe7 Rf7 20.Qe4 Bb3 21.Ra3 Ba4 22.Rfa1–+) 19...Nf6 20.Qc2 Bf1 21.Rf1 d5 22.f3 Bd6 23.g3 Bg3! 24.hg3 Qg3 25.Kh1 Qh4 26.Kg1 Qg5 27.Kh2 Qe3 28.Rg1 Qf4 29.Kg2 (29.Kh3 Rg8 30.Bc3–+) 29...Ne4! 30.Bc1 Qg3 (30...Qg3 31.Kh1 Nf2) 0–1. Szymanski,Leszek (1860) – Bajerlein,Dawid (1980), Szachowe Lato Poznan Poland, 2010.

4.e3 e5 5.Be2 e4 6.Nd4 Qg5 (6...d5 7.Bb2=) 7.0–0 d5 8.f4 Qg6 (8...Qf6 9.Nc3=) 9.c4 (9.Bb2 Bd6=) 9...dc4=+ 10.Qc2 Nf6 11.f5 (11.Bc4 Bh3 12.Rf2 Bg4=) 11...Qh6 12.Nc3 Bd6 Do you see the mate threat? 13.g3 0–0 (13...Kd8 14.Ne4 Ne4 15.Qe4=) 14.Ne4 Be5 (14...Ne4 15.Qe4 Ra4 16.f6=) 15.Bb2 (15.Nf6 Qf6 (< 15...Bf6 16.Bb2=) 16.Qc4 b6=+) 15...b5 (15...Nbd7 16.Rfb1=) 16.a4 (16.Bf3 Re8=) 16...Re8=+ 17.Nf2 Bd7 (17...Na6 18.Nc6 Bf5 19.Qf5 Bb2 20.Rab1+–) 18.Nf3 (18.Bf3 Ra6=) 18...Bb2=+ 19.Qb2 Nd5 (19...ba4 20.g4 Nd5 21.Bc4=) 20.ab5= Ra1 21.Ra1 cb5 (21...c3 22.dc3 Qe3 23.c4=+) 22.e4 (22.Nd4 Nb6=) 22...Nb6 23.Rb1 (23.d4 Bc6=) 23...Qd6 (23...Rc8 24.Nd4 Na4 25.Qc2=) 24.Qd4 (24.d3 Qc5=) 24...Nc8 (24...Qd4 25.Nd4 Re5 26.Nf3=) 25.d3 cd3 (25...Nc6 26.Qd6 Nd6 27.dc4 Ne4 28.Ne4 (28.cb5?! Nc3 29.bc6 Bc6=+) 28...bc4 29.Nc3+–) 26.Bd3+= Nc6 27.Qd6 Nd6 28.Bb5 Ne4 29.Ne4 Re4 30.Rd1 Be8 31.Rd6 Na7 32.Bd3 Re7 33.Kf2 (33.Rd8 Nc6 34.Rc8 Ne5 35.Ne5 Re5+=) ½–½. Benassi,Aspasio (2085) – Simmelink,Jop (2250), WC–2001–F–00002, 2001.

4.e3 Nf6 5.Be2 e5 6.0–0 Be7 (6...e4 7.Nd4=) 7.Bb2 d6 8.d4 ed4 (8...e4 9.Bc3 Qd5 10.Nfd2=+) 9.ed4 0–0 10.c4 d5 11.Nbd2 (11.Bc3 Qc7=) 11...Be6 (11...dc4 12.Nc4 Qd5 13.Nb6+–) 12.Ne5 (12.Nb3 Qc7 13.c5 b6=) 12...Qc7 (12...dc4 13.Ndc4 Qd5 14.Nb6+–) 13.c5= Nbd7 (13...b6 14.cb6 Qb6 15.Qc2=) 14.f4 (better is 14.Nd7 Qd7 15.Re1=) 14...Nc5 (better is 14...b6!?=) 15.dc5+/– Bc5 16.Kh1 Bf5 17.Bd3 Ne4 18.Ne4 de4 19.Bc4 (19.Qc2 ed3 20.Qc5 Qa5 21.Nd3 Bd3+–) 19...b5 20.Bb3 Bb6 21.Qh5+/– Be6 22.Be6+– fe6 23.Qg4 Rf6 24.Rfd1 Rd8?? 25.Rd8 Qd8 26.Nc6 Rg6 27.Qg6! (27…hg6 28.Nd8 Bd8 29.a4 ba4 30.Ra4+–; 27.Nd8?! Rg4 28.Ne6 Kf7+–) 1–0. Hofmann,Bernhard (1895) – Mueller,Georg (2080), Wattens op, 1995.

4.e4 e5 5.Nc3 Nf6 6.Bd3 d6 7.0–0 Bg4 (7...b5 8.Bb2=+) 8.h3 Bh5 9.a4 Be7 10.Ba3 0–0 11.Qe2 Nbd7 12.Rfb1 Rfb8 13.Qe3 Bf3 14.Qf3 Nc5 Attacks the isolani on a4 15.Bc4 Qc7 16.Bc5 dc5 17.Ra2 h6 18.d3 Bd8 19.Nd1 Ne8 (19...b5 20.ab5 Ra2 21.Ba2 cb5 22.Ne3=) 20.Ne3+= Nd6 21.Nf5 (21.Bb3 Bg5=) 21...Nf5 22.Qf5 Bf6 (22...b6 23.c3=) 23.a5+= Ra7 24.c3 Ra5 25.Ra5 Qa5 26.Rb7 Rb7 27.Qc8 Bd8 28.Qb7 Qc7 29.Qa6 Kf8 30.g3 (30.Bb3 Qb8 31.Ba2 Qb2+–) 30...g6 31.h4 h5 32.Qa8 Kg7 33.Kg2 g5 34.hg5 Bg5 35.Kf1 Bd8 36.Qa3 Qd6 37.Ke2 Be7 38.Qa7 Qf6 39.Qc7 Bd8 40.Qb8 Ba5 41.Qb3 h4 42.Qa3 Bb6 43.Qa6 Bd8 44.Qc8 hg3 45.Qg4 Kf8 46.Qg3 Ba5 47.Kd2 Qh6 48.Qe3 Qe3 49.fe3 Ke7 50.Kc2 Bc7 ½–½. condoru (2050) – rona81 (1985), gameknot.com, 2015.

3.ba5 Ra5

4.e4 d5 5.ed5 Qd5 6.Be2=.

4.e4 d6 5.d4+= Nd7 6.Bd3 g6 (6...e5 7.0–0+=) 7.Bd2 (7.0–0 Bg7+=) 7...Ra8 8.0–0 (8.Be3 Bg7+=) 8...Bg7 9.c3 (9.Re1 Ngf6+=) 9...Ngf6 10.Re1 e5 (10...0–0 11.a4+=) 11.Qb3= 0–0 12.Qb4 (12.a3 Re8=) 12...c5 (12...Qc7 13.Be3=) 13.Qb2 (13.Qb5 ed4 14.cd4 Re8+=) 13...b6 (13...ed4 14.cd4 cd4 15.Nd4=) 14.Bb5+= Qc7 (14...ed4 15.cd4 Re8 16.Bc6+=) 15.d5+/– Ba6 16.c4 (16.Na3 Qd8+/–) 16...Bb5= 17.Qb5 Nh5 (17...Ne4!? 18.Re4 f5=) 18.Nc3+/– Ndf6 (18...Nf4 19.Qb3+/–) 19.Reb1 Rfb8 20.Qb2 (20.Rb3 Nf4+/–) 20...Ne8 (20...Nf4 21.Qb3+=) 21.Nb5 (21.a3 Nf4+/–) 21...Qd8 (21...Qd7 22.Qc2+/–) 22.Bg5 f6 23.Bd2 g5 (23...f5 24.Qc2+=) 24.Be3 (24.a3 Nf4+/–) 24...Nf4 25.Bf4 (25.Qd2 f5 26.ef5 Qd7+/–) 25...gf4 (25...ef4 26.Nc3 f5 27.ef5 Qf6=) 26.Nh4+– Bf8 27.Nf5 Qd7 28.Qe2 Kh8 29.Rb3 (29.Qg4 Ra4+/–) 29...Ng7 30.Ng7 Bg7 31.Rab1 f5 (31...Ra6 32.Kh1+/–) 32.ef5 Rf8 (32...Ra6 33.a3+/–) 33.Nc3+– Qf5 (33...Rf5 34.Qf3+–) 34.Rb6 (34.Ne4+–) 34...Rae8? (better is 34...Ra3!? 35.R1b3 Rb3 36.Rb3 Qg6+/–) 35.Ne4+– (35.Rd6?! e4 36.Qc2 f3+=) 35...f3 (35...Rd8 36.R1b5+–) 36.Qf3 Qf3 37.gf3 Rf3 38.Nd6 Ref8 39.Ne4 R3f4 40.Re1 Bf6 (40...Kg8 41.Rb5 Rg4 42.Kf1+–) 41.Rf6 R4f6 42.Nf6 Rf6 43.Re5 Ra6 44.Re2 Kg7 45.Rd2 Rd6 (45...Kf7 46.Kg2+–) 46.Kg2 Kf6 (46...Kf7 47.Kf3+–) 47.a4 h6 (47...Kf7 48.a5+–) 48.a5 (better is 48.Re2 Rd8 49.Re6 Kf7+–) 48...Ke7 (48...Ke5 49.Kf3+–) 49.Re2 Kd7 (49...Kd8 50.Re6 Rd7+–) 50.Re6! h5 (50...Re6 51.h4) 51.Rd6 Kd6 52.f4 h4 53.f5 Ke5 54.f6! Kd4 (54...Kf6 55.a6) 55.f7 (55.d6 Kc4 56.d7 Kb3+–) 55...Ke5 56.f8Q Kd4 (57.Qf4 Kd3 58.Qf1 Kc3 59.h3 Kb4 60.d6 Kc3 61.d7 Kc2 62.Qf5 Kb2 63.d8Q Kb3 64.Qb1 Ka3 65.Qdd3 Ka4 66.Qb5) +–. kamret (2155) – peti0815 (2085), GameColony.com, 2003.

4.e4 Nf6 5.e5 Nd5 6.c4 Nc7 7.d4 d6 8.Be2 g6 (8...de5 9.Ne5 Nd7 10.Nd7 Qd7 11.0–0+=) 9.ed6+/– Qd6 10.c5 Qd8 11.Bd2 Ra8 12.Bf4 Bg7 13.Be5 f6 14.Bc7 Qc7 15.0–0 0–0 16.Bc4 Kh8 17.Nc3 Na6 18.Ne4 (18.Rb1 e5=) 18...Nb4 (better is 18...Bg4!?=) 19.Qb3+/– Qa5 20.a3 Na6 21.Qe3 Nc7 22.Rfb1 Nd5 23.Bd5 cd5 24.Nc3 Qd8 25.Rb6 e5 (25...Ra6!?+=) 26.Rd6+/– (26.de5?! fe5 27.Rd6 d4 28.Rd8 de3 29.Rf8 Bf8=) 26...ed4 27.Nd4 (< 27.Rd8 de3 28.Rd5 f5=+; 27.Qd4?! Qa5 28.Rd5 Be6+=) 27...Qa5 28.Nb3 Qa7 29.Rd5 f5 30.Nb5 Qa4 31.N3d4 h6 (31...f4 32.Qf3+/–) 32.Rd6 f4 33.Qe7 Bf5 (33...Qc4 34.Re1+–) 34.Nf5 (34.Qb7 Rfb8 35.Qc6 Rb5 36.Qb5 Qb5 37.Nb5 Ba1–/+) 34...Rf5 35.Rg6 Rg8 36.Nd6 Qd4 37.Rc1 (better is 37.Re1 Rc5 38.Nf7 (38.Nb7 Rc2 39.Qh4 Qe4 40.Rh6 Bh6 41.Qh6 Qh7 42.Qf6 Qg7 43.Qh4 Qh7 44.Qh7 Kh7+/–) 38...Kh7 39.Rh6 Bh6 40.Ng5 Kg6 41.Nf3+–) 37...Kh7?? (better is 37...Rc5 38.Nf7 Kh7 39.Rh6 Bh6 40.Qc5 Qc5 41.Rc5 Ra8+–) 38.Rh6! Kh6 39.Nf5 Kg6 40.Nd4 Bd4 41.Qe4 (41…Kf6 42.Qd4 Kf7 43.c6+–) 1–0. b4_player (1890) – Scamexterminator (1970), GameColony.com, 2002.

4.g3 e5 5.e4 Nf6 6.d3 Bc5 7.Bg2 (worse 7.Ne5 Bd4 8.Nf7 Kf7–+) 7...d6 8.0–0 Be6 9.c4 0–0 10.Bd2 Ra6 11.Bc3 Nbd7 12.Nbd2 Qa8 13.Qc2 Qa7 14.a4 b6 (14...Ng4 15.Nb3=+) 15.Nb3 Ra4?? (15...Ra8 16.d4 ed4 17.Nfd4=) 16.Nc5?? (better 16.Ra4 Qa4 17.Ra1+–) 16...Nc5=+ 17.Ra4 (17.d4!? ed4 18.Nd4 Ra1 19.Ra1=+) 17...Qa4–/+ 18.Qd2 Qb3 19.Ra1 (better 19.Rc1–+) 19...Nfe4! 20.de4 Ne4 (20...Ne4 21.Qe1 Nc3–+; 20...Qc4?! 21.Re1 Ne4 22.Re4 Qe4 23.Qd6=+; 20...Bc4?! 21.Ne1=) 0–1. Perdomo Araujo,Angel E (2060) – Martinez Reyes,Pedro R (2300), 26th Torneo San Viator, 2016.

3.ba5 d5

4.c4 e6 5.Bb2 Qa5 6.e3 Nf6 7.Be2 Nbd7 8.0–0 Bd6 9.d4 0–0 10.Nbd2 b6 11.Qc2 Qa4 12.Qb1 Bb7 13.Ne5 Bc7 14.f4 c5 15.cd5 Ne5 16.fe5 Nd5 17.Rf3 Nb4 18.Rh3 h6 19.Bd1 Qa6 20.a3 Qd3 21.Qc1 Nc6 22.e4 Qa6+= 23.Nf3 cd4 24.Rh6?? Qd3 25.Rh4 Qe3 26.Kh1 Rfd8 27.h3 Ra5 28.Rg4 Rc5 29.Qb1?? d3 30.Qa2 Na5 31.Ba4 d2 32.Ng5 Nc4 33.Bb3 Ba6 34.Nf7 Kf7 35.Rf1 Kg8 (35...Kg8 36.Rgf4 Be5 (36...Nb2 37.Be6 Kh8 38.Rf8 Rf8 39.Rf8 Kh7 40.Bf5 Kh6 41.Qe6 Kg5 42.Qe7 Kf4 43.Bh7 Kg3 44.Qg7 Kh4 45.Qg4) 37.Be5 Re5–+ (37...Ne5 38.Be6 Kh8 39.Rh4 Qh6 40.Rh6 gh6 41.Rd1=)) 0–1. Walter,G – Boehnisch,M, Freiburg, 1970.

4.e3 Bf5 5.Nd4 Bg6 6.Nb3 e6 7.Bb2 Nf6 8.Ba3 (8.Be2 Bd6=) 8...Ba3 9.Na3 Qd6 10.Nb1 0–0 11.Be2 c5 12.d3 Nc6 13.Qd2 Rfc8 14.Nc3 Nd7 (14...Qe7 15.0–0=) 15.Nb5+= Qe7 16.c4 (16.0–0 e5+=) 16...Nb4 (16...dc4 17.dc4 Rd8 18.Qd6=) 17.0–0 dc4 (17...Ne5 18.f4 Ned3 19.a3 dc4 20.ab4=) 18.dc4+= Ne5 (18...Rd8 19.Qd6 Qg5 20.f4+/–) 19.Qd6+/– Qd6 20.Nd6 ½–½. Althoff,Guntram (2095) – Balduan,Markus (2350), 2006.

3.c3 ab4

4.cb4 d5 5.Bb2=.

4.cb4 e6 5.Bb2 Nf6 6.Qb3 Na6 7.a3 d5 8.e3 Be7 9.d4 0–0 10.Nc3 Bd7 11.Be2 b6 12.Na4 Ne4 13.0–0 c5 14.dc5 bc5 15.b5 c4 16.Bc4 dc4 17.Qc4 Nd6 18.Qg4 e5 19.Qh5 Bb5 20.Qe5 Bf6 21.Qf4. NN – COMP, 1994.

3.c3 g6

4.e3 (4.b5 d5=) 4...Bg7 5.b5 a4 (5...Nf6 6.d4=) 6.Na3 (6.d4 Nf6=) 6...d5 7.Rb1 (7.bc6 bc6 8.d4 Nf6=) 7...e5 (7...c5 8.Be2=) 8.Be2 (8.bc6!? bc6 9.d3=) 8...e4=+ 9.Nd4 c5 (9...Qg5 10.Bf1=+) 10.Ndc2 Qa5 (10...Nf6 11.0–0=+) 11.g3 (11.b6 Ne7=) 11...c4 (11...Nf6 12.b6 0–0 13.f3=+) 12.h4 (12.b6 Bd7=+) 12...Qd8 13.Nd4 Nd7 14.Nac2 (14.f4 Nc5=+) 14...Ne5 15.Ba3 Nf6 16.b6 (16.Nb4 Nd3 17.Nd3 cd3–/+) 16...Ra6 (16...Nd3 17.Bd3 cd3 18.Nb4–/+) 17.Nb4 Ra5 18.h5 Bg4 (18...Nh5 19.Bh5 gh5 20.Rh5=+) 19.Bg4 (19.h6 Bf8–/+) 19...Nfg4–/+ (19...Neg4 20.Nbc6 bc6 21.Nc6 Nf2 22.Kf2 Ng4 23.Qg4 Qf6 24.Ke1+–) 20.f4 ef3 21.Nf3 0–0 22.Ne5 Ne5 23.Qe2 Rb5 24.h6 Nd3 25.Kd1 Be5–+ 26.Kc2 Nb4 27.Rb4–/+ Rb4 28.Bb4 Re8 29.Qf3 Re6 30.Rf1 Rf6–+ 31.Qe2 Qb6 32.Qg4 The mate threat is Qc8 32...Re6 33.Qf3=+ Threatening mate... how? 33...f6 34.Qd5= Do you see the mate threat? 34...Qc6 35.Qa5? Kf7 36.g4=+ Bc7 37.Qc5= Threatening mate: Qf8 37...Qe4 38.Kc1 Bd6 39.Qd4? Qd4–/+ 40.ed4 Bb4 41.cb4 b5 42.Kb2 Re4 43.g5 f5 44.Kc3 Ke6 45.a3 Kd5 46.Rf2 Rd4 47.Re2 Re4 48.Rf2 Ke5 Black intends f4 49.Rf1 f4 50.d4 Rd4 51.Re1 Re4 52.Rd1 Re3 53.Kb2 f3 54.Rd7 f2 55.Rf7 Re2 56.Kc3 Ra2 (57.Rf2 Ra3 58.Kc2 Ra2 59.Kc3 Ra1–+) 0–1. Kirac,Smiljan – Mufic,Goran, Rijeka–Kraljevica, 2001.

4.e3 Bg7 5.b5 Nf6 6.a4 0–0 7.Ba3 d6 8.h3 Bd7 9.d4 Qb6 10.Nbd2 (10.c4 Qc7=) 10...cb5 (10...Qc7 11.c4=) 11.Rb1 (11.ab5 Rc8 (11...Bb5? 12.Qb3+–) 12.c4 Qc7=) 11...Nd5 (11...Qc7 12.Bb5 Qc3 13.Qb3=+) 12.Qc2 (12.Qb3 Nc7=) 12...Nc7 (better 12...b4 13.Qb3 Bc6–/+) 13.ab5+= Rc8?? (better 13...Nd5+=) 14.Nc4+– Qa7 (14...Qb5 15.Rb5 Nb5 16.Nb6 Na3 17.Qb3+–) 15.b6 Qa6 16.Nd6! Qf1 (16...ed6 17.Ba6) 17.Rf1 (17.Rf1 ed6 18.bc7+–) 1–0. petrobbo (2055) – GambitKing (2205), ChessWorld.net, 2020.

3.c4 ab4

4.Qb3 Na6 =+.

4.d4 Nf6 5.a3 =+.

4.d4 Nf6 5.Qb3 e6 (5...Na6 6.a3=+) 6.c5= Na6 (6...Qa5 7.Bd2 Na6 8.Bf4=+) 7.e3 (7.a3 ba3 8.Ra3 d6–/+) 7...b5 (7...d6 8.Ba6 ba6 9.Qb4 dc5–/+) 8.Nbd2 (8.a4 ba4 9.Ra4 d6=) 8...Be7 (8...d6!? 9.cd6 Bd6–/+) 9.Bd3 0–0 10.0–0 Bb7 (10...d6 11.cd6 Bd6 12.a4=+) 11.e4 (11.a4 ba4 12.Ra4 d6 13.cd6 Bd6=+) 11...h6 (11...d6 12.cd6 Qd6 13.e5+–) 12.Bb2 (12.a4 ba4 13.Ra4 d6 14.cd6 Bd6+–) 12...Qa5 (12...d6 13.cd6 Bd6 14.e5+/–) 13.a4= ba4 14.Ra4 Opening the a–file gets White a lot of play (< 14.Qa4 Qa4 15.Ra4 Nc5 16.Ra8 Nd3–/+ (< 16...Ba8 17.dc5 Bc5 18.Bf6 gf6 19.Nb3=)) 14...Qc7 15.Rfa1 Qc8 16.Qc4 (16.Ba6 Ba6 17.Qb4 Qb8+/–) 16...Nc7 (16...d6 17.cd6 Bd6+–) 17.Qb4 (17.Ra8 Na8 18.Qb4 Nc7+–) 17...Ba6 18.Ba6 (18.Nc4 Qb8 19.Nfe5 Qb4 20.Rb4 Rfb8 21.Rb8 Rb8+/–) 18...Na6 19.Qc3 (19.Qb6 Rb8 20.Qa6 Qa6 21.Ra6 Rb2+/–) 19...Qb7 (19...d6 20.cd6 Bd6 21.Ba3 Ba3 22.R4a3+/–) 20.Qb3 Qb3 21.Nb3 Rfb8 22.Ra6 Ra6 23.Ra6 Rb3 24.Rb6 Rb6 25.cb6 The passed pawn on b6 quickly leads to threats 25...Ne4 26.Ne5 Nf6 27.b7+= Bd6 28.Nc4 Bc7 29.Nb6 d6 30.Nc8 Kf8 31.Ba3 Ne8 32.Na7 Nf6 33.Nc6 Nd7 34.Na7 Ke7 35.Nc8 Kf6 36.Nd6 Bb8 37.Ne8 Kg6 38.Bd6 Bd6 39.Nd6 Kf6 40.Ne8 Kf5 41.d5 ed5+/– 42.Nc7 Nb8 43.Nd5+– Ke5 44.Ne3 Kd6 45.Nf5 Kc6 46.Ng7+– Kb7 47.Nf5 Kc6 48.Nh6 f6 49.Ng8 Nd7 50.h4 Kd5 51.h5 Ke6 52.g3 Kf7 53.Nh6 Ke6 54.Kg2 f5 55.g4 fg4 56.Kg3 Nf6 57.Kh4 Ne4 58.Ng4 Kf5 59.h6 Kg6 60.f4 Nd6 61.Kg3 Nf5 62.Kf3 Nh6 63.Nh6 Kh6 64.Ke4 Kg6 65.Ke5 Kf7 66.Kf5 Kg7 67.Ke6 Kg8 68.Ke7 Kg7 69.f5 Kh6 70.f6 Kg6 71.f7 Kg5 72.f8Q Kg4 73.Ke6 Kg3 74.Qf5 Kg2 75.Ke5 Kg3 76.Qf4 Kg2 77.Kf5 (77…Kh3 78.Qd6+–) 1–0. SuperForte5 – REXChess 80286, 1994.

4.e4 e6 –/+.

4.d4 d5

5.Qb3 e6 6.Nbd2 Nf6 7.e3 Be7 8.Bd3 0–0 9.0–0 Qa5 10.Ne5 Qa4 (10...Nbd7 11.f4=+) 11.Qa4 (11.Bb2 Nfd7=+) 11...Ra4 12.Bb2 Nbd7 13.f4 (13.f3 Ne5 14.de5 Nd7–/+) 13...Ne5–/+ 14.fe5 Nd7 (14...Ng4 15.Rf3–/+) 15.e4 b6 (15...Bg5 16.Rfd1=+) 16.ed5 cd5 17.cd5 ed5 18.Bc2 (18.Kf2 Ra7=) 18...Ra8 19.Bb3 Bb7 20.Rac1 Rfc8 21.Kf2 Nf8 22.Nf3 Ne6 23.Ke3 Bg5 (better is 23...Rc1!? 24.Bc1 f6=+) 24.Ng5+= Ng5 25.Rc8 Rc8 26.Rc1 Rc1 27.Bc1 Ne4 28.Bc2 f5 29.Be4 de4 30.Kf4 g6 31.e6+/– Bd5 32.Ke5 Ba2 33.d5 b3?? 34.Kf6 Kf8 35.d6 Ke8+– 36.Be3 b2 37.d7 (37...Kd8 38.Bb6) 1–0. Trkn – CoolChessWiz, ICC, 2005.

5.cd5 Qd5 6.Bf4 Bf5 =+.

5.e3 Bg4 6.Nbd2 e6 7.Bd3 dc4 8.Nc4 Nf6 9.Nce5=+.

5.e3 Bg4 6.Nbd2 e6 7.Bd3 Nf6 8.Qc2 (8.0–0 Nbd7=+) 8...dc4–/+ 9.Bc4 Nbd7 10.0–0 Be7 11.Bd3 0–0 12.Ne5 Bh5 13.Nd7 (13.Ndc4 h6=+) 13...Qd7–/+ (< 13...Nd7 14.Bh7 Kh8 15.Bd3+=) 14.Nc4 Qc7 15.Ne5 Rfd8 16.f4 c5 (16...Rd5 17.Bc4–/+) 17.Bb2=+ Rdc8 (17...b6 18.a3 Nd5 19.Bh7 Kh8 20.Qd3–/+) 18.Qb3 (18.f5 Bg4=+) 18...Nd7 19.Be4 (19.Nd7 Qd7 20.dc5 Bc5–/+) 19...Ne5 (19...c4 20.Qc2 f5 21.Bf3 Bf3 22.Rf3 Ne5 23.fe5–+) 20.fe5–/+ Ra7 21.a3 ba3 22.Ba3 b6 23.Qd3 Bg6 24.Bg6 hg6 25.Rab1?? Ra4 Black prepares the advance c4 26.Bb2–/+ c4 27.Qd2 Bb4 Black prepares c3 28.Qf2 b5 29.Qf3 Qd7 30.Ba1 c3 31.Kh1?? Ba5 32.d5? ed5 (33.Qe2 b4–+; 32...c2 33.Rbc1 Bd2 34.de6 Qe6 35.Bb2–+) 0–1. Benassi,Aspasio – Noire,Eric, WC–2001–F–00002, 2001.

5.e3 Bg4 6.Nbd2 e6 7.Bd3 Nf6 8.Qc2 (8.0–0 Bd6=+) 8...dc4 9.Bc4 (9.Nc4 Bf3 10.gf3 Be7–/+) 9...Nbd7 (9...Bd6 10.e4–/+) 10.0–0 (10.h3 Bf3 11.Nf3 Bd6=+) 10...Be7 (10...Bd6 11.h3 Bf3 12.Nf3=+) 11.Bd3 0–0 12.Ne5 Bh5 13.Nd7 (13.Ndc4 Ra7=+) 13...Qd7–/+ (< 13...Nd7 14.Bh7 Kh8 15.Bd3+=) 14.Nc4 (14.Bb2 Rfd8–/+) 14...Qc7 (14...Bg6 15.Bg6 fg6 16.Nb6+=) 15.Ne5=+ Rfd8 16.f4 (16.f3 Qd6–/+) 16...c5 (16...Qd6 17.Bb2–/+) 17.Bb2=+ Rdc8 18.Rfc1 (18.f5 cd4 19.Qc7 Rc7 20.ed4 Ng4=+) 18...Qd8 (18...b6 19.a3 ba3 20.Ra3 Ra3 21.Ba3=+) 19.Qb3 (19.dc5 Bc5 20.Qf2 Ng4 21.Ng4 Qd3–+ (21...Bg4?! 22.Be4–/+)) 19...Nd7 (19...b6 20.dc5 bc5 21.a3–/+) 20.Be4 (20.Nd7 Qd7 21.Be4 Bg4=+) 20...Ne5–/+ 21.fe5 Ra7 22.a3 ba3 23.Ba3=+ b6 24.Qd3 Bg6–/+ 25.Bg6 hg6 26.Rab1 Ra4 27.Rf1 Rca8–/+ 28.Bb2 c4 29.Qd2 Bb4 30.Qf2 R8a7 31.Rbc1 b5 32.Qf3 Rc7 Black intends c3 33.Qe2 Qd5 34.e4–/+ Qd7 35.Ba1 c3 36.Kh1 Ba5 37.d5 ed5 (38.ed5 Qd5–+) 0–1. Benassi,Aspasio (2085) – Noire,Eric (2175), WC.2001.F.00002, 2001.

5.e3 Bg4 6.Nbd2 Nf6 7.Bd3=+.

5.e3 Bg4 6.cd5 Qd5 7.a3 e6 –/+.

2.Nf3 Qb6

3.a3 e6 4.e3 a5 5.ba5 Ra5 6.Be2 Nf6 7.0–0 Be7 8.d3 d5 9.Nbd2 Bd7 10.Nb3 Ra8 11.a4 Qc7 12.a5 Na6 13.Bb2 0–0 14.Ne5 Bd6 15.f4 b6 16.Qe1 Nb4? (better is 16...ba5 17.Ra5 Nb4=) 17.Qg3+– (17.Nd7?! Nd7 18.Qg3 g6=) 17...Ne8?? (better is 17...Be7 18.ab6 Qb7+–) 18.ab6 (18.Nd7?! Qd7 19.c3 Na6+=) 18...Qb6 (18...Qb7 19.Ra8 Be5 20.Re8 Be8 21.Be5+–) 19.Ra8 (19.Ra8 Be5 20.Be5 Nc2 21.Re8 Qe3 22.Qe3 Ne3 23.Rf8 Kf8 24.Ra1+–) 1–0. Chashchev,S (2310) – Kvasova,Nika, Doroshkevich mem, Maykop RUS, 2008.

3.Bb2 (--> 1.b4 c6 2.Bb2 Qb6 3.Nf3).

3.c3 d5 4.d4 Bf5 5.Nbd2 e6 6.Bb2 Bd6 7.g3 (7.Nh4 Bg4=+) 7...Nf6 8.Bg2 Nbd7 9.e3 (9.Nh4 a5=+) 9...0–0–/+ 10.0–0 Qc7 11.a4 Ne4 (11...a5 12.Ba3–/+) 12.a5 Nd2 13.Qd2 e5 14.de5 Be5 (14...Ne5 15.Ne5 Be5 16.a6=+) 15.Ne5 (15.Rfc1 Rad8=) 15...Ne5=+ (< 15...Qe5 16.c4 Qd6 17.cd5+/–) 16.f4 (16...Nc4 17.Qf2–/+; 16.Qd4!? Nc4 17.Bc1=+). I need chocolate... – FatMaHa, ChessWorld.net, 2005.

3.a3 a5

4.ba5 Qa5 5.e3 e5 6.Be2 e4 7.Nd4 Nf6 8.Bb2 d5 9.0–0 Bd6 10.d3 Qc7 11.h3 Nbd7 (11...0–0 12.Nd2=+) 12.c4 dc4 13.de4 Ne4 14.Bc4 Ne5 15.Be2 0–0 16.Qc2 f5 17.Nc3 Qe7 (17...Nc3!? 18.Qc3 f4=) 18.Ne4+– fe4 19.Qe4 Bd7 20.a4 Qg5 21.f4 Qg3? (better 21...Qh4+–) 22.fe5+– Be5 23.Rf3 Rf3 (23...Qh2 24.Kf1 Bg3 25.Bc4 Kh8+–) 24.Bf3?? (24.Qf3 Qf3 25.Bf3+– (25.gf3?! c5+–; 25.Nf3?! Bb2 26.Rb1 Bf6+–)) 24...Bh3+– 25.Bc3 (25.Qc2 Rf8 26.Qf2 Qh2 27.Kf1 Bg4+–) 25...Rf8 (25...Bg2 26.Bg2 Rf8+–) 26.Ra2+– c5? (26...g5 27.Rf2 g4=) 27.Nb5 (27.Qd5 Kh8 28.Qc5 Rc8+–) 27...Qh2 28.Kf1 Bg3?? (28...Bc3 29.Nc3 Bd7+–) 29.Qd5 (29.gh3? Qa2 30.Be1 Qa1–+) 29...Kh8 30.gh3 Qh1 31.Ke2 Qg1 32.Kd3 Qb1 33.Ke2 (better 33.Rc2!? Qf1 34.Be2 Qh3 35.Qc5 Re8+–) 33...Qg1 34.Rb2 (34.Rd2 Qf2 35.Kd1 Qg1 36.Kc2 Qe3+–) 34...c4 (34...Qf2 35.Kd3 c4 36.Kc4 Qf3 37.Qf3 Rf3 38.Nd4+–) 35.Nd4 (better 35.Qb7 Qf2 36.Kd1 Qf3 37.Qf3 Rf3 38.e4+–) 35...Qf2 36.Kd1 Qe3?? (better 36...Qf1 37.Kc2 Qd3 38.Kc1 Qc3 39.Nc2 Qf6+–) 37.Qc4 Bf4 38.Bd2 (38.Bb7 Qc1 39.Ke2 Qe3 40.Kf1 Be5 41.Nf3 Bc3+–; 38.Rb7?! Qc1 39.Ke2 Re8 40.Ne6 Qe3 41.Kd1 Qf3 42.Kc2 A) 42...Qb7?? 43.Bg7 (43.Nf4?! Qb6+–) 43...Kg8 44.Nd8 (44.Nf4 Kg7 45.Qd4 Kf7=+) 44...Kg7 45.Nb7+–; B) 42...Qg2 43.Kd3 Qh3 44.Kc2 Qg2 45.Kd1 Qh1 46.Kc2 Qg2 47.Kd1 Qf3 48.Kc2 Qg2=) 38...Qa3 (38...Qg1 39.Be1 Rd8 40.Bd5+–) 39.Rb7 (better 39.Qb4!? Qb4 40.Rb4 g5+–) 39...Qa1 40.Kc2 Be5 (40...Bd2 41.Kd2 Rd8 42.Kc2+–) 41.Bc3 (41.Bc3 Qg1 42.Ne2 Qg6 43.Be4+–) 1–0. Neagu,L (2025) – Cotruta,Alexandru_Mihai (1775), ch–ROU, 2018.

4.ba5 Ra5 5.Nc3 d5 6.e3 Nf6 7.Be2 Nbd7 8.d4 e6 9.0–0 Bd6 10.Rb1 Qc7 11.a4 Ne4 12.Bd2 Nc3 13.Bc3 Ra4 14.h3 0–0 15.Bd3 e5 (better is 15...b5!?–/+) 16.de5 Ne5 17.Bh7 (17.Ne5!? Be5 18.Bh7 Kh7 19.Qh5 Kg8 20.Be5=) 17...Kh7+= 18.Ng5?? (better is 18.Ne5 Rh8 19.Nf3+=) 18...Kg8–+ 19.Qh5 Bf5 20.f4 Bg6 (better is 20...Nc4 21.Rbe1 Re8 22.Bd4–+) 21.Qe2 Nc4 22.f5 Be7 23.Ne6 fe6 24.fg6 Qg3 25.Rf8 Bf8 26.Qh5 Qe3 27.Kh2 Qh6 28.Qh6 (28.Qg4 Bd6 29.Kh1 Ra8 30.Qe6 Kh8–+) 28...gh6 29.Rb7 e5 30.Be1 Bd6 31.Rh7 Ne3 32.g4 (32.Rd7 Bf8–+ (worse is 32...Nc2 33.Bg3 Bf8 34.Be5–+)) 32...e4 33.Kg1 Bc5 34.Kh2 Ra2 35.Bh4 (35.Bg3 Rc2 36.Kh1 Rc1 37.Kh2 Nf1 38.Kg2 Ng3 39.Kg3–+) 35...Rc2 36.Kh1 Nf1 (36...Rc1 37.Kh2 Bd6 38.Bg3 Rc2 39.Kh1 Bg3 40.Rh8 Kh8 41.g7 Kg7 42.Kg1 Rc1) 37.Bf6 0–1. Jaskulski,Klaus (1865) – Brauer,Christian (2120), Berlin Unicorn op, 2008.

4.Bb2 ab4 5.Bd4 c5 (5...Qc7!?=) 6.Bc5!–/+ Qf6 (6...Qc5 7.ab4) 7.Bd4 Qc6 8.ab4 Ra1 9.Ba1 Qa4 10.Bd4 Nc6 11.c3 Qa2 12.e3 d6 13.Bb5 e5 14.Bb6 g6 15.d3 Bg7 16.0–0 Qe6 17.e4 Nge7 18.Bc4 d5 19.ed5 Nd5 20.Qb3 Nce7 21.Bc5 0–0 (21...Qd7 22.Be7 Ne7+–) 22.Be7 Qe7 23.Bd5 Kh8 24.Re1 f5 25.Nbd2 h6 (25...Rd8 26.c4+–) 26.Nc4 e4 27.de4 fe4 28.Ncd2 Bf5 (29.Be4 Qd7+–) +–. themonkey (2110) – condan16 (2020), GameColony.com, 2002.

4.c3 ab4 5.cb4 Nf6 6.e3 =+.

4.c3 e6 5.e3 ab4 6.Qb3 bc3?? (better is 6...Qa5+=) 7.Qb6+– 1–0. Kappel,Ray – Zeidan,Mohammad, 37. LSS No Engine Cup Preliminary, 2011.

4.c3 Nf6 5.d4 (5.ba5 Qa5 6.d3 e5=+) 5...d5 (5...ab4 6.cb4 d5 7.Bb2=+) 6.e3 (6.Qa4 Ra7=+) 6...Bf5 (6...ab4 7.cb4 Bg4 8.Bd3=+) 7.Be2 (7.Nh4 Bg4 8.Qa4 e5=+) 7...e6 (7...ab4 8.cb4 e6 9.Bb2–/+) 8.Bd2 (8.Nh4 ab4 9.Nf5 ef5–/+) 8...h5 (8...ab4 9.cb4 Nbd7 10.Nc3–/+) 9.h3 (9.c4 ab4 10.c5 Qa7=+) 9...Nbd7 (9...ab4 10.cb4 Nbd7 11.Nc3=+) 10.0–0 Ne4 (10...ab4 11.cb4 Bd6 12.Qe1=+) 11.Nh4 (11.Qa4 Qd8 12.b5 Nb6–/+) 11...Bh7–/+ 12.Bh5? (better is 12.Nf3!?–/+) 12...Nef6 (better is 12...ab4 13.cb4 Nef6–+) 13.Bf7? (13.Be2 ab4 14.c4 dc4 15.Bc4 Bb1 16.Qb1 Rh4 17.ab4 Ra1 18.Qa1–+) 13...Kf7 14.Nf3 Ne4 15.Nh2 Bf5 16.Ng4 Bd6 17.Qf3 Rh4 18.Rc1 Ng5 19.Qe2 Bg4 20.hg4 Rah8 21.f4 Ne4 (22.g3 Rh1 23.Kg2 R1h2 24.Kf3 Re2 25.Ke2 Qa6 26.c4 ab4–+) 0–1. chessotka – Garfield85 (1820), internet, 2006.

3.a3 d5

4.Bb2 a5 5.Bd4 Qd8 6.Nc3 ab4 7.ab4 Ra1 8.Qa1 e6 9.e4 Bb4?? (better is 9...f6 10.Qa5 Qa5 11.ba5 c5=) 10.Bg7+– (10…Nf6 11.Bh8 Ne4 12.Bd3+–) 1–0. b4_player (1940) – Didier (2140), GameColony.com, 2002.

4.e3 Bg4 5.Be2 Nf6 6.Bb2 a5 7.Bd4 Qc7 (7...Qd8 8.Bf6 ef6 9.b5=) 8.Be5 Qb6 9.ba5 Qa5 10.0–0 (10.Bc3 Qa4=) 10...Nbd7=+ 11.Bg3 e6 12.d3 (12.Nc3 Ne4 13.Ne4 de4=) 12...Be7 13.Nbd2 0–0 (13...b5 14.c4=+) 14.Nb3 (14.c4 b6=+) 14...Qc3 (14...Qa4!?=+) 15.Nfd4= Be2 16.Ne2 Qb2 17.Qd2 Ra3 (17...Nh5 18.d4 Ng3 19.Ng3 Ra3 20.Rab1 Rb3 21.Rb2 Rb2 22.Ra1=) 18.Rab1 Rb3 19.Rb2 Rb2 20.Ra1 Rb6 21.Bc7 Ra6 22.Ra6 ba6 23.Qc3 c5 24.Qb2 Rc8? (better is 24...c4!?=) 25.Qb7+/– Rf8 26.Qa6 e5 27.c4 d4 28.f4 e4 29.de4 d3? 30.Nc3 d2 31.e5 Ne4 32.Nd1 f5 33.Qe6 (33...Rf7 34.Qd7+–) 1–0. oldsage – RageofKlugman, ChessWorld.net, 2006.

3.a3 Nf6

4.e3 d5 5.Nc3 Bf5 6.Bb2 a5 7.Na4 Qc7 (7...Qd8 8.b5=) 8.Nc5 ab4 9.ab4 Ra1 10.Qa1 b6 11.Na6 Na6 12.Qa6 e5? (better is 12...Bc8 13.Qa8 Qb7 14.Qb7 Bb7=) 13.d3?? (better is 13.Be5!? Qd8 14.Nd4+–) 13...Bd6 (better is 13...Bb4 14.Kd1 e4–/+) 14.Qa8+= Qb8 (14...Bc8 15.Be5 Be5 16.Ne5+=) 15.Qc6 (15.Qb8 Bb8 16.Ne5 c5+/–) 15...Bd7 (15...Ke7 16.Qa4+=) 16.Qc3+/– e4 e5 seems the pivot of the position 17.Ne5 (17...Ba4 18.Ng4 Ng4 19.Qg7=). dugmak – FatMaHa, ChessWorld.net, 2005.

2.Nf3 d5

(--> 1.b4 d5 2.Nf3 c6).

3.e3 Nd7 4.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nd7 4.Nf3).

3.e3 Nf6 4.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3).

3.e3 Bg4 4.h3 Bh5 5.Bb2 Nf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.h3 Bh5).

3.e3 g6 4.Bb2 Nf6 5.Be2 Bg7 6.0–0 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0–0 6.0–0 c6).

3.a3 Nf6

4.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.Nf3 Nf6 4.a3).

4.Bb2 e6 5.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3).

3.Bb2

3.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.Nf3).

3.Bb2 Nd7 4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nd7 4.Nf3).

3.Bb2 f6 4.e3 e5 5.a3 Be6 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 Be6 5.Nf3 c6).

3.Bb2 f6 4.e3 e5 5.b5 Be6 (--> 1.b4 e5 2.Bb2 f6 3.b5 d5 4.e3 Be6 5.Nf3 c6).

3.Bb2 Bg4 4.e3 Nf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4).

3.Bb2 Nf6

4.a3 Nbd7 5.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.a3).

4.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3).

4.e3 Bf5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6).

4.e3 Bf5 5.a3 e6 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3).

4.e3 Bg4 5.Be2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2).

4.e3 Bg4 5.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 c6).

4.e3 Bg4 5.Be2 Nbd7 6.a3 e6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2 e6 6.a3 Nbd7).

3.e3 e6

4.Bb2 Nf6 5.b5 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6).

4.Bb2 Nf6 5.b5 Be7 6.Be2 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0–0 6.Be2 c6).

3.e3 Bf5

4.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Bf5 4.Nf3).

4.Bb2 e6 5.a3 Nf6 6.Be2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.Be2 e6 6.a3).

2.Nf3 d6

3.Bb2 e5 (--> 1.b4 e5 2.Bb2 d6 3.Nf3 c6).

3.c4 a5 4.b5 e5 5.Nc3 Nf6 6.e4 cb5 7.cb5 d5 8.ed5 e4 (8...Bd6 9.d4 Bb4 10.Bd2+=) 9.Ng5 Bf5 10.f3 ef3 11.Qf3 (< 11.gf3 Be7=+) 11...Bg6 12.Bb2 Nbd7 13.Be2 Bc5 14.Nce4 Ne4 15.Ne4 Qh4 16.Nf2 0–0 17.0–0 Rfe8 18.g3 Qb4 19.Bc3 Qa3 20.d6 Rab8 21.h4 f6 (21...Bd6 22.h5 Bc2 23.h6=) 22.h5 Bf7 23.h6 g6 24.Bd1 Bb6 (24...Ba2 25.Bc2 (25.Bf6?! Qf3 26.Bf3 Bc4+=) 25...Bd6 26.Bb1+–; 24...Bd6 25.Ne4 Bd5 26.Nf6 Nf6 27.Qf6 Bc5 28.Kh2 Qc3 29.Qc3 Bg1 30.Kg1 Re5 31.Qe5 Ba2 32.Qb8#) 25.Kg2 f5 (25...Ba2 26.Bc2 (26.Bf6?! Qd6 27.Ra2 Nf6=) 26...f5 27.Bb1 Qd6 28.Ba2 (28.Ra2?! Ne5 29.Be5 Re5+–) 28...Kf8 29.Ne4+–; 25...Qd6?! 26.Ne4 Qd5 27.d3=+) 26.Qd3 Qc5 27.Rc1 (27.Bb3 Bb3 28.ab3 Ne5 29.Be5 Qe5+=) 27...Re6 (27...Ne5 28.Be5 Qc1+=) 28.Ba5?? (28.Bb2 Qd6 29.a3 Rbe8=+) 28...Qc1 29.Bb6 Qb2 30.Bc7 Ra8 31.Qc3 Qc3 32.dc3 Re5 (< 32...Ra2 33.Bb3 Rb2 34.Be6 Be6 35.Re1+/–) 33.a4 Bc4 34.Rg1 Re3 35.a5 Bb5 36.Bf3 Bc6 37.Bc6 bc6 38.c4 Re2 39.Ra1 Kf7 40.Kf1 Re3 (40...Rc2 41.Re1 Re8 42.a6–+) 41.Kg2 g5 42.Rf1 Re2 43.Ra1 Rc2 44.Kf1 Re8 45.a6 Ree2 46.Nd3 Rh2 47.Kg1 Rcg2 48.Kf1 Rg3 49.Ra3 Rgg2 50.Ba5?? (50.a7 Rd2 51.Kg1=) 50...Ra2 51.Ra2 Ra2 52.Bd8 g4 53.c5 Ra6 (54.Kf2 Ra3–+) 0–1. Winiger,Albert (2150) – Riemer,Wolfgang (2310), RSX8D – priv – XMAS, 2004.

3.c4 Nf6 4.d4 Nbd7 5.Nc3 e5 6.e3 e4 7.Nd2 d5 8.Qb3 Nb6 9.b5 c5 10.dc5 Bf5?? (better is 10...Bc5 11.Nd5 Be6 12.Nf6 Qf6+=) 11.cb6+– d4 12.ed4 Qd4 13.Bb2 Qb6 14.Nd5 Nd5 15.cd5 f6 16.Nc4 Qc7 17.b6 ab6 18.Nb6 Rb8 19.Bb5 (19...Kd8 20.Nc4+–) 1–0. Fiedler,Peter – Koslowski,Volker (1985), T0076 DESC, 2003.

3.d4 g6 4.e4+= Bg7 5.Nbd2 Qc7 (5...e5 6.Bb2+=) 6.Bd3 Nd7 7.0–0 Ngf6 8.Re1 (8.c3 0–0+=) 8...0–0 9.a3 (9.c4 c5+=) 9...a5 10.Bb2 b5 11.c4 bc4 12.Nc4 ab4 13.ab4 Ra1 14.Qa1 Nb6 (14...d5 15.Qa5 Qb7 16.e5=) 15.Qa5+= Nfd7 16.Ra1 Qb7 (16...d5 17.Nb6 Nb6 18.Qc5+=) 17.Nb6+/– Qb6 (17...Nb6 18.Qa7+/–) 18.Qb6 Nb6 19.Ra7 Re8 (19...Rd8 20.Re7 c5 21.b5+–) 20.Rc7 Na4 (20...Bd7!?+/–) 21.Ba1+– c5? (better is 21...Bg4 22.Rc6 Ra8+–) 22.Bb5 (22.bc5?! Nc5 23.Bb5 Rd8+/–) 22...Rd8 23.Ba4 cb4 (23...Bg4 24.Bb2+–) 24.Re7 Be6 25.Ra7 Rc8 26.Bb2 d5 27.e5 h5 (27...Bh6 28.Kf1+–) 28.Kf1 (28.Ng5 Rc4+–) 28...Bh6 29.Rb7 Bf8 30.Ng5 Ra8 31.Ne6 Ra4 (31...fe6 32.Bd7 Ra6 33.Rc7+–) 32.Nf8 (32.Nc5 Ra5+–) 32...Kf8 33.Rb4! Ra2 (33...Rb4 34.Ba3) 34.Ke2 (34.Rb5 Ke8+–) 34...Ke7 35.Kd3 (35.Rb7 Ke6+–) 35...Ke6 (35...h4 36.Rb7 Ke6 37.h3+–) 36.Rb6 Ke7 37.Kc3 h4 (37...Ra7 38.Bc1 Rc7 39.Kb2+–) 38.Kb3 Ra5 (38...Ra7 39.Ba3 Ke8 40.Rb5+–) 39.Ba3 Kd7 (39...Kd8 40.Rb7+–) 40.Rb7 Kc6 (40...Ke8 41.Re7 Kd8 42.Rf7 Rb5 43.Kc3+–) 41.Rf7 Rb5 (41...g5 42.Be7+–) 42.Ka4 Rb1 43.Rf6 Kb7 (43...Kc7 44.Rg6 Rd1 45.Rg4+–) 44.Rg6 (better is 44.e6 Rd1 45.e7 Rd4 46.Kb5 Re4+–) 44...Rf1 (44...Kc7 45.Rg7 Kc6 46.Rg4+–) 45.Kb5 Rb1 46.Kc5 Rf1 (46...Rb3 47.Bb4 Rb2+–) 47.Rg7 Ka6 48.e6 (48.Kc6 Rf2 49.Bc5 Rf6 50.ef6 Ka5 51.Ra7#) 48...Rf2+– 49.e7 Re2 50.Kd5 Kb5 51.Rg4 h3 52.Re4 hg2 (52...Rf2 53.e8Q Kb6 54.Re6 Kc7 55.Rc6 Kb7 56.Qd7 Kb8 57.Rc8#) 53.e8Q Ka5 54.Qa8 (54...Kb6 55.Bc5 Kb5 56.Re2 g1Q 57.Rb2#) 1–0. b4_player (2220) – arfil019 (1805), GameColony.com, 2003.

3.e3 Qb6 4.a3 Bg4 5.Be2 Nd7 6.c4 h6 7.c5 (better 7.d4!?+=) 7...dc5=+ 8.bc5 Qc5 9.Bb2 g5?? (9...Ngf6 10.Nc3=+) 10.Nc3 (better 10.Bh8 Qf5 11.h3 Bf3 12.Bf3+– (worse 12.gf3 f6+–)) 10...Ndf6 11.Rc1 Qb6 12.Na4 Qc7 13.Nc5 Nh7?? (better 13...e6=) 14.Bh8+– h5 (14...Nhf6 15.0–0+–) 15.Be5 Qa5 (15...Qc8+–) 16.Bc3 (better 16.Nb7!? Qd5+–) 16...Qa3?? (16...Qc5 17.Bd3 Bf3 18.gf3 f5+–) 17.Nb7 Rb8 (17...e6 18.Bd4 Qe7 19.Na5+–) 18.Na5 (18.Ra1 Qa1 19.Ba1 Rb7+–) 18...Qd6 (18...Rc8 19.Nc4 Qc5 20.Bd4+–) 19.Be5 Qd8 (19...Qd5 20.Bb8 Qa5 21.Rc6+–) 20.Bb8 (better 20.Nc6 Qb6 21.Nb8 f6+–) 20...Qb8 (20...Qa5 21.Rc6 Nhf6 22.Ne5+–) 21.Nc6 Qb7 22.Na5 (better 22.Rb1 Qc7 23.Rb8 Qb8 24.Nb8 Bh6+–) 22...Qb6 23.Rc8 (23.Rc8 Bc8 24.Qc2+–; better 23.Qa4 Bd7 24.Rc8 Qd8 25.Rd8 Kd8 26.Qe4+–) 1–0. aravind555 – Yaroslav_Soldatov, lichess.org, 2018.

3.e4 e5 4.c4 Bg4 5.Nc3 Nf6 6.Be2 Be7 7.0–0 a5 (7...Nbd7 8.Rb1=) 8.b5+= Nbd7 9.d4 0–0 10.Be3 Rc8 11.Rc1 Re8 (11...ed4 12.Qd4 Nc5 13.Rcd1+=) 12.h3 (12.d5 cd5 13.cd5 Bh5+=) 12...Bh5= 13.Re1 Bf8 14.Nd2 Bg6 15.d5 cd5 16.cd5 Nc5 Will e4 fall? 17.f3 Nh5 (17...Nfd7 18.Na4+=) 18.Nc4 Nf4 (18...Be7 19.b6 Bg5 20.Bf1 Be3 21.Re3+–) 19.Bf1 Qg5 (19...Be7 20.Na4 Na4 21.Qa4+–) 20.Kh1 (20.Kh2 Ncd3 21.Qd3 Qg2 22.Bg2 Nd3=) 20...Qg3 (20...f5 21.Kh2 fe4 22.g3 (worse 22.Na5 Qd8=+) 22...ef3 23.Qd2+– (worse 23.gf4 ef4 24.Bc5 Qg3 25.Kh1 dc5=+)) 21.Ne2 (21.Qd2 Bh5 22.Bf2 Qg5+–) 21...Ne2 22.Qe2 1–0. OnlyPolishOpening (2100) – Stupidilusions (2040), lichess.org, 2020.

2.Nf3 e6

3.a3 d5 4.Bb2 a5 5.e3 ab4 6.ab4 Ra1 7.Ba1 Nf6 8.b5 Bd6 9.Be5 Be5 10.Ne5 Nbd7 11.Nf3 (11.Nd7 Bd7 12.bc6 bc6=) 11...e5 12.Be2 (12.d4 Qa5 13.c3 e4=) 12...0–0 (12...e4 13.Nd4 c5 14.Nb3=) 13.0–0 (13.d4 e4 14.Nfd2 Qb6=) 13...e4 14.Nd4 c5 15.Nb3 c4 (15...Qb6 16.f3=) 16.Nd4 Ne5 17.Nc3 Qd6 18.f4 ef3 19.Bf3 Bd7 (19...Re8 20.h3=) 20.Qe2 Ra8 21.Qf2 (21.h3 Be6=) 21...Nf3 22.Qf3 Qe5 23.Qf2 Ra3 24.Qf4 (24.Qh4 b6=) 24...Qf4 25.ef4 Kf8 26.Re1 h6 (26...h5 27.h3=) 27.h3 Ra8 28.g4 h5 29.g5+= Re8 30.Ra1 Ne4 31.Nd5 Bh3 32.Ra3 Bg4 33.d3= cd3 34.Rd3 Nc5 35.Re3 Rd8 36.c4 h4 37.Nf3 h3 38.g6 (White fights for the Initiative) 38...f6 39.Nd4 Ra8 40.Nc7 Rc8 41.b6+= Nd7 42.f5 Ne5 43.c5 Rb8 44.Nce6+/– Kg8 45.Ra3+– Kh8 46.c6 bc6 47.b7! Nd7 48.Ra8 h2 49.Kh2 c5 50.Nc5!! Bf3 51.Nf3 Rf8 52.Nd7 Rg8 53.Rg8 Kg8 54.b8Q# 1–0. mrkt (2325) – Spork (2505), ICC, 2003.

3.a3 Nf6 4.e3 d5 5.c4 Be7 (5...dc4 6.Bc4 b5 7.Bb3=) 6.c5 (6.cd5 ed5 7.d4 0–0=) 6...0–0 (6...b6 7.d4=+) 7.Nc3 b5 (7...a5!?=+) 8.a4+= a6 (8...ba4 9.Qa4 Nfd7 10.d4+=) 9.d4 (9.ab5 cb5 10.Bb5 Bb7+=) 9...Bb7+= 10.a5 Nbd7 (10...Ne4 11.Qc2 f5 12.Bd3+=) 11.Bd3 Re8 12.Bb2 Bf8 13.h3 Qc7 14.Ne2 g6 15.0–0 Bg7 16.Ng3 Re7 17.Qc2 Ne8 18.Rad1 (18.Ne2 Bc8+=) 18...e5 (18...Nef6 19.Rfe1+=) 19.e4 ed4 (19...de4 20.Be4 (worse 20.Ne4 f5=) 20...ed4 21.Bd4+=) 20.ed5 (20.Bd4 Rd8+–) 20...cd5+= 21.Qd2 (21.Rfe1 Ne5 22.Ne5 Be5+=) 21...Bc6 (21...Ndf6 22.Nd4 Ne4 23.Be4 de4 24.Nde2+=) 22.Rde1 Re1 23.Re1 (worse 23.Ne1 Ne5=) 1–0. Cirulis,Ilmars (1785) – Hilbert,Stephan J (1715), FICGS, 2015.

3.c3 Nf6 4.e3 Be7 5.Be2 c5 6.bc5 Bc5 7.0–0 0–0 8.d4 (8.d4 Be7 9.c4=). Zyryanov,Pavel (1700) – Vasquez,Carlos, FICGS, 2006.

3.c4 Bb4 4.Bb2 Nf6 5.Nc3 0–0 6.e3 d5 7.cd5 ed5 8.Be2 Bg4 9.0–0 Bd6 10.h3 Bh5 11.Nd4 Be2 12.Qe2 (12.Nce2 Nbd7=+) 12...Re8–/+ 13.Nf5 Be5 (13...g6 14.Nd6 Qd6 15.a4–/+) 14.Rac1 (14.f4 Bd6=+) 14...d4–/+ 15.Na4 (15.ed4? Bh2 16.Kh2 Re2 17.Ne2 Na6–+) 15...d3 16.Qf3 Nbd7 17.Be5 Ne5 18.Qg3 Nh5 19.Qh4 Nf6 20.Qg5?? (20.Qg3 g6 21.Nc5–/+) 20...Ng6–+ 21.h4? (21.Nc5 Re5 22.Nb7 Qd7–+) 21...Re5 (better 21...Re4!? 22.Nc5 Rg4 23.Nb7 Rg5 24.Nd8 Rf5 25.Nc6–+) 22.h5 Rf5?? (better 22...h6 23.Qg3 Nh5–+) 23.Qf5+– Ne7 24.Qh3 (24.Qe5!?+–) 24...h6 25.f4 (25.Rfd1 Qc7+=) 25...Qa5= 26.Nc3 b5 (26...Rd8 27.a4=) 27.e4 (27.Qf3!?+=) 27...b4= 28.Nd1 Ne4 29.Qd3 Nc5?? (better 29...Qb6 30.Nf2 f5=) 30.Qd6+– Ne4 31.Qe7 Qb6 (31...Nd2 32.Re1 Qh5 33.Nf2+–) 32.Kh2 (32.Ne3 Ng3 33.Rf2 Qd8 34.Qd8 Rd8+–) 32...Nf6 (32...Qb5 33.Re1 (33.Qe4?! Qf1 34.Rb1 a5+–) 33...Nf6 34.Ne3+–) 33.Ne3 Qb5 34.Nc4 (better 34.Rc5 Qb6 35.Rc4+–) 34...Qh5+– 35.Kg1 Re8? (better 35...Ng4 36.Rfe1 Qh2 37.Kf1 Qh1 38.Ke2 Qg2 39.Kd1 Nf2 40.Kc2 Qg6 41.Kb3 Nd3+=) 36.Qa7+– (36.Qb4?? Ng4 37.Qf8 Kf8 38.Rf3 Qh2 39.Kf1 Qh1) 36...Ng4 37.Rf3 Qh2 (37...c5 38.Rh3 Qd5 39.Qa4+–) 38.Kf1 Qh1 (38...g6 39.Ne5 Qh1 40.Qg1 Nh2 41.Kf2 Qg1 42.Rg1 Nf3 43.Kf3+– (worse 43.gf3 Rd8+–)) 39.Qg1 Qh4 (39...Qh5 40.Rh3 Qd5 41.Qb6+–) 40.Rh3 Qe7 41.Ne3 (41.Re3 Ne3 42.Qe3 Qe3 43.Ne3 Ra8+–) 41...Nf6? (better 41...Qe4 42.Ke2 Qf4 43.Rc6 Qe4+–) 42.Qf2 Ne4 43.Qe2 (43.Qe1 Qd6 44.Kg1 c5+–) 43...Qd7? (43...Qd6+–) 44.Kg1 Re6 (44...Qd6 45.Ng4 Qf4 46.Re3+–) 45.Nf5 (better 45.Rc4+–) 45...Nd2?? (45...Ng3 46.Nh6! Kf8+–) 46.Qg4 Qa7 (46...g6 47.Nh6 Kf8 48.f5+–) 47.Kh1 Rg6 (47...g6 48.Nh6 Kf8 49.Nf5 gf5 50.Rh8 Ke7 51.Qg8+–) 48.Nh6! gh6 49.Qe2 Rd6 (49...Qa2 50.f5 Qb2+–) 50.Qe8 Kg7 51.Rg3 (51.Qe5 Rf6 52.Rg3 Kf8 53.Qf6 Qd7 54.Re1 Ne4 55.Qh6 Ke7 56.Qg5 f6 57.Re4 Qe6 58.Qc5 Kd8 59.Re6 Kc7 60.Rg7 Kc8 61.Re8) 51...Rg6 52.Rg6 fg6 53.Rc6 Qf7 54.Qe5 Kg8 55.Rc8 (55.Rc8 Qf8 56.Qd5 Kg7 57.Rc7 Kh8 58.Qd7 Qf7 59.Qf7 b3 60.Qg7) 1–0. owkenobi – abel777 (1620), gameknot.com, 2018.

3.e4 Bb4 4.Bb2 Nf6 5.e5 Nd5 6.c4 Nc7 7.Qc2 0–0 8.a3 Be7 9.d4 d5 10.ed6 Bd6 11.Bd3 h6 12.0–0 Nd7 13.Nbd2 b6 14.Ne5 Bb7 15.Rfe1 Ne8 16.Ne4 c5 (16...Be7 17.c5=+) 17.Qa4 (17.Nd7 Qd7 18.dc5 bc5 19.Nd6 Nd6=) 17...Be5 18.de5 Qc7 19.f4 Rd8 20.Rad1 (20.Qa7?? Ra8 21.Qa8 Ba8–+) 20...Nb8 (20...Bc6 21.Qb3=) 21.Bb1 Nc6 22.Rd8 Qd8 23.Rd1 Qh4 24.Qc2 g6 (24...Qf4? 25.Nc5 g6 26.Nb7 Ne5 27.Qc3+–) 25.Qc1 Na5 26.Rd7 Bc6 27.Ra7 Qd8 28.Nf2 Qb8 29.Re7 Qd8 30.Ra7 Qb8 31.Re7 ½–½. Jan_Ek (2125) – Sejwan (2275), internet, 2020.

3.Bb2

3.Bb2 (--> 1.b4 e6 2.Bb2 c6 3.Nf3).

3.Bb2 d5 (--> 1.b4 c6 2.Bb2 d5 3.Nf3 e6).

3.Bb2 d5 4.e3 Nf6 5.a3 Be7 6.c4 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6).

2.Nf3 Nf6

(--> 1.b4 Nf6 2.Nf3 c6).

3.a3 e6 4.e3 h6 5.Bb2 d5 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 h6).

3.Bb2 Qb6 4.a3 d5 5.e3 e6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3 Qb6).

3.Bb2 d5 4.a3 e6 5.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3).

3.Bb2 d5 4.e3 a5 5.b5 (--> 1.b4 c6 2.e3 a5 3.b5 d5 4.Bb2 Nf6 5.Nf3).

3.Bb2 d5 4.e3 Bg4 5.c4 Nbd7 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3 Nbd7).

3.Bb2 e6 (--> 1.b4 e6 2.Bb2 c6 3.Nf3 Nf6).

3.Bb2 e6 4.a3 d5 5.e3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 e6 5.a3).

3.Bb2 e6 4.a3 Be7 5.e3 d5 6.c4 Nbd7 7.d4 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6 7.d4 Nbd7).

3.e3 d5 4.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3).

3.e3 d5 4.Bb2 a5 5.b5 (--> 1.b4 c6 2.e3 a5 3.b5 d5 4.Bb2 Nf6 5.Nf3).

2.g3 d5

3.a4 Na6 4.b5=+ Nc5 5.Ba3 Na4–/+ 6.Nc3? Nb6 7.e3 Nf6 8.Rb1 a6 9.bc6 bc6 10.Bc5 Bg4?? 11.Be2?? Nbd7 12.Na4 Qa5 13.Nb6 Nb6 14.Bb6–/+ Qb6?? 15.Rb6+– Bd7 16.Qb1 Rc8 17.Ra6 Ne4 18.Rb6 h5 19.Rb8 Nf6 20.Ba6 Rd8 21.Rd8 Kd8 22.Qb6 Ke8 23.Qb8 (23...Bc8 24.Qc8#) 1–0. kalaidoskop@ – kromm@, mySchach.de, 2005.

3.a4 e5 4.Bb2 f6 5.b5 =+.

3.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.g3).

3.Nf3 Nd7 =+.

3.Nf3 Nf6 4.Bb2 g6 5.Bg2 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 d5 5.Bg2 c6).

3.Bg2 e5 4.e4 (4.a3 Qf6=+) 4...d4 (4...Bb4!? 5.Bb2 d4–/+) 5.a3 a5 6.Bb2 (6.Nf3 Bg4=+) 6...ab4–/+ 7.ab4 Ra1 8.Ba1 Bb4 9.c3 Bc5 10.Nf3 f6 11.0–0 (11.cd4 ed4 12.0–0 Be6–/+) 11...Bg4 (11...d3 12.Bb2–/+) 12.Qb3 Qd7 (12...Qb6 13.Qc2–/+) 13.Qa4 (13.cd4!? Bd4 14.Nd4 ed4 15.Qc4=+) 13...Bf3 14.Bf3 Ne7 15.Bd1 d3 16.Bb2 0–0?? (better is 16...b5 17.Qb3 Na6–/+) 17.Qc4+– Kh8 18.Qc5 Na6 19.Qc4 b5 20.Qb3 c5 21.Na3 c4 22.Qb5+/– Qb5 23.Nb5 Rb8 24.Ba4?? h5?? 25.Ba3+– Nc8 26.Nd6 Nd6 27.Bd6 Rc8 28.Bb5 Nc5 29.Bc5 Rc5 30.Rb1 g6 31.Rb4 f5 32.ef5 gf5 33.Bc4 e4 34.Bf7 Kg7 35.Bh5 Kf6 36.h4 Ke5 37.Bd1 Rc7 38.Rb5 (38...Ke6 39.Bb3 Kf6 40.Rb6 Kg7 41.h5+–) 1–0. fantom – super knight, internet, 2006.

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    Available lines:
  • 1.b4 (4 players, 1 day/move)
  • 1.b4 (4 players, 10 days/move)
  • 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 (4 players, 3 days/move)
  • 1.b4 e5 2.Bb2 Bb4 3.f4 ef4 4.Bg7 Qh4 5.g3 fg3 6.Bg2 gh2 7.Kf1 hg1Q 8.Kg1 (Kucharkowski-Meybohm gambit, 6 players, 10 days move)
  • 1.b4 e5 2.Bb2 f6 3.e4 Bb4 4.Bc4 (Sokolski gambit, 4 players, 3 days/move)
  • 1.c4 Nf6 2.b4 (English orangutan, 4 players, 3 days/move)
  • 1.e4 c5 2.b4 (Sicilian: Wing gambit, 4 players, 10 days/move)
  • 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4 (French: Wing gambit, 4 players, 3 days/move)

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