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TESTB500 Release 2021-08-03
Send your 1.b4 games to me, please. Thank you! /Marek
Marek Trokenheim's homepage
(c) Marek Trokenheim

1.b4 c6 2.Bb2 d5

(...)

3.a3 a5 (--> 1.b4 c6 2.Bb2 a5 3.a3 d5).

3.a3 Bd7 4.e3 Nf6 5.c4 dc4 6.Bc4 e6 7.Nf3 Be7 8.0–0 0–0 9.d4 Be8 10.Nbd2 Nbd7 11.Qc2 g6 (11...a5 12.ba5 Qa5 13.Rfc1+=) 12.Bd3 Qc8 13.Rac1 b5? (13...a5 14.Bc3+/–) 14.Ne4 (better is 14.Bb5!? Nb6 15.Bc6 Bc6 16.Qc6+–) 14...Ne4 15.Be4 Bf6? (better is 15...Nf6!?+/–) 16.Bc6 Qc6?? (16...Rb8+–) 17.Qc6 Nb8 (17...Nb6 18.Qb7 Rd8+–) 18.Qa8 Nc6 19.Rc6 Bc6 20.Qc6 a6 21.Ne5 (better is 21.Qa6 Rb8+–) 21...Kg7 22.Nd7 a5 23.Nf6 ab4 24.Nd7 ba3 25.Ba3 Ra8 26.Qa8 (26.Qa8 Kh6 27.Bf8 Kh5 28.Qf3 Kh4 29.Qf4 Kh5 30.Nf6) 1–0. Fournier,Frederic (2060) – Chicot,Patricia (1620), Active Blind, 2007.

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

3.a4 b6 4.e3 Nd7 (4...f6 5.Bd3=) 5.d4 (5.Nf3 Ngf6=) 5...Ngf6 6.Nf3 e6 7.b5 Qc7 8.bc6 Qc6 9.Bb5 Qc7 10.0–0 Bb7 11.Nbd2 a5 (11...Rc8!? 12.Rc1 Be7=) 12.c4+= Ba6 (12...Bc6 13.Qb3+=) 13.Ba6+– Ra6 14.Rc1 dc4 15.Nc4 Qb7 16.Qc2 Be7 (16...Ra8 17.Nfe5+–) 17.Nd6! Bd6 18.Qc8 Qc8 19.Rc8 Ke7 20.Rh8 Nf8 (20...h6 21.Rb1+–) 21.Rc1 (21.Ne5 Ng6 22.Rc8 h6+–) 21...Ra8? (better 21...b5 22.ab5 Rb6+–) 22.Ne5 Be5 (22...Nd5 23.Rg8 g6 24.Rg7 Be5 25.de5+–) 23.de5 Nh5 (23...Nd5+–) 24.Rc7 Ke8 25.Ba3 Kd8 26.Rf7 (26.Rf7 Nf6 27.ef6 gf6 28.Rhf8; 26.Re7 Nf6 27.Rf8 Ne8 28.Rfe8) 1–0. DEFFM – GuestHBQH, freechess.org, 2018.

3.a4 Qb6 4.c3 a5 5.Qb3 ab4 6.cb4 e6 7.b5 Nf6 8.e3 Bd7 9.Nf3 cb5 10.ab5 Ra1 11.Ba1 Bc5 (11...Bd6 12.Bd4 Qd8 13.Be2=) 12.Be2+= 0–0 13.0–0 Ne4 14.Nc3 Nc3 15.Bc3 f6 16.Ra1 Be8 (16...Qc7 17.d4 Bd6 18.Bd3+=) 17.Nd4 (17.Ba5 Qa7 18.b6 Qa8+–) 17...Bd4 (17...Bg6!?+=) 18.Bd4+– (18.ed4?! Bg6=) 18...Qc7 19.g3 (19.Qc3 Qc3 20.Bc3 Bg6+–) 19...b6 20.f3 (20.f4 Nd7+–) 20...Bf7 (20...e5 21.Bb2 (worse 21.Qd5 Bf7 22.Qe4 ed4–/+) 21...Bf7 22.d4=) 21.Qa3 (21.Qc3!? Qd8 22.f4+–) 21...e5= 22.Bc3 Nd7 23.Qa7 Qd6 Black intends d4 24.Qb7 (24.d4 Rc8 25.Bd2 Re8=) 24...d4 25.Bb4?? (better 25.Qc6 Qc6 26.bc6 dc3 27.cd7=) 25...Nc5?? (better 25...Qb4 26.Qd7 Qd2–+) 26.Qc6+= Qc6 27.bc6 de3 (27...Rc8 28.c7 Ne6+–) 28.de3+– Rc8 29.Bb5 (better 29.Ra7!?+–) 29...Bd5= 30.Rc1 (30.Bc5!? bc5 31.Rc1 Bc6 32.Rc5=) 30...Bc6=+ 31.Bc6 (31.Bc4!? Kh8 32.Bc5 bc5 33.e4=+) 31...Rc6–/+ 32.Bc5 Rc5 33.Rc5 (better 33.Rb1!? b5 34.e4–/+) 33...bc5–+ 34.Kf1 Kf7 35.Ke2 Ke6 36.Kd3 f5 37.Kc4 g5?? (better 37...Kd6–+) 38.Kc5= h5 39.Kc6 (39.f4 ef4 40.ef4 h4=) 39...h4 (better 39...f4!? 40.gf4 ef4 (40...gf4?? 41.e4+–) 41.ef4 g4 (worse 41...gf4 42.Kc5+–) 42.fg4 hg4=) 40.gh4 gh4?? (better 40...f4 41.ef4 g4 (41...gf4?! 42.h5 e4 43.fe4=) 42.f5 Kf7 (42...Kf5?! 43.fg4 Kg4 44.h5 Kh5 45.Kd5=) 43.fg4 e4–+) 41.h3+– f4 (41...Ke7 42.Kd5 Kf6+–) 42.e4 Ke7 43.Kd5 Kf6 44.Kd6 Kg5 45.Ke5 Kg6 46.Kf4 Kh5 47.Kf5 Kh6 48.Kg4 (48.Kf6 Kh7 49.Kf7 Kh6 50.f4 Kh5 51.e5 Kh6 52.e6 Kh5 53.e7 Kh6 54.e8Q Kh7 55.Qg8 Kh6 56.Qg6) 48...Kg7+– 49.Kh4 (49.Kh4 Kh6 50.Kg3+–) 1–0. RichardSommer (2020) – kurzeme (2075), lichess.org, 2020.

3.a4 Qc7 4.b5 Bf5 5.e3 e5=+ 6.Nf3 Nd7 7.Be2 Bd6 8.d3 Ngf6 9.0–0 0–0 10.c4 e4 11.Nd4 Bh2 12.Kh1 Bg6 13.Nd2? Be5 14.f4 Bd4–+ 15.Bd4 ed3 16.Bf3 Ne4 17.Ne4? de4–+ 18.Bg4 f5 19.Bh5 Qd6 20.c5 Nc5 21.Be5 Qe6 22.bc6 bc6 23.Qd2 Nb3 24.Qa2 Rae8 25.Bg6 hg6 26.Rad1 Kf7 27.Kg1 c5 28.Rf2 c4 29.Rb2 Rc8 30.Bc3 Qe7 31.a5 Qh4 32.Be1?? Qh5–+ 33.Rdb1 Rh8 34.Kf2 Qh4 35.Kf1 Qh1 36.Kf2 Rh2 37.Kg3 Rch8 38.Qb3 cb3 39.Rb3 Qf1 (40.Rb7 Ke8 41.Re7 Kd8 42.Re8 Ke8 43.Rb8 Kd7 44.Rb7 Kc6 45.Rb6 ab6 46.ab6 Qe1; 39...Qg2) 0–1. Xelaju – shooin, Live Game Caissa's Web, 2006.

3.a4 Qd6 4.b5 =+.

3.a4 e6 4.e3 Nf6 5.b5 Be7 6.Nf3 0–0 7.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0–0 6.Be2 c6 7.a4).

3.b5 cb5 4.a4 a6 (better 4...ba4!? 5.e3 Nf6–/+) 5.ab5= Bf5 6.e3 e6 (6...Qc7 7.Nc3 Nf6 8.ba6 ba6 9.Nb5=) 7.c4 (better 7.ba6 ba6 8.Bb5 Nd7 9.Ba6+= (9.Ra6? Ra6 10.Ba6 Qb6–+)) 7...Bc5?? (better 7...dc4 8.Bc4 Bd3 9.Bd3 Qd3 10.ba6 Ra6 11.Ra6 ba6=) 8.Bg7+– Ne7 (8...dc4 9.Bh8 Bd3 10.Nf3+–) 9.Bh8 Nd7 (9...dc4 10.Bc4 Bd3 11.Bd3 Qd3 12.Nc3+–) 10.Nf3 Ng6 11.Bb2 dc4 12.Bc4 Nde5 (12...a5+–) 13.Ne5 Ne5 14.Be5 (14.Be5 Bd6 15.Bd6 Qd6 16.ba6 ba6 17.Qa4 Ke7 18.d4+–) 1–0. BeepBeepImAJeep (2470) – dkaj, lichess.org, 2018.

3.Qc1 Qb6 4.e3 a5 (4...Qb4 5.Nf3–/+) 5.c3 (5.b5!?=) 5...ab4–/+ 6.cb4 Qb4 7.Nf3 e6 8.Bd3 Nf6 9.Qc2 Be7 10.0–0 Qb6 11.Nd4 (11.Nc3 Na6–/+) 11...Nbd7 12.Nb3 0–0 13.Bd4 (13.a4!?–/+) 13...c5–+ 14.Bb2 (14.Bf6 Nf6 (14...gf6?! 15.Nc3–/+) 15.Be2 c4–+) 14...c4 15.Bc4 dc4 16.Bd4 (16.Qc4 Qd6–+) 16...Bc5 (better 16...cb3 17.ab3 Ra1 18.Bb6 Nb6–+) 17.Nc5 Qc5?? (better 17...Nc5 18.Qc4 Nfd7–+) 18.Bc5+– Nc5 19.Qc4 b6 20.Nc3 Ba6 21.Nb5 Rac8 (21...Nce4 22.Qb4 Nd2 23.Rfc1+–) 22.a4 Nce4 (22...e5+–) 23.Qe4 (better 23.Qb4+–) 23...Ne4–+ 24.Nd6 (24.d4–+) 24...Nd6 25.d4 (25.Rfb1 Rc6 26.d4–+) 25...Bf1 26.Rf1 (26.Kf1 Rc2 27.Rb1 Ne4 28.Rb6 Rf2 29.Kg1 Ra2–+) 26...Ra8 27.Ra1 b5 28.a5 Nc4 29.a6 Ra7 30.Kf1 Rfa8 31.Ke2 (31.g4 Ra6 32.Ra6 Ra6–+) 31...Ra6 32.Rb1 Ra2 33.Kd3 Rb2 (better 33...R8a3 34.Ke4 Rf2 35.d5–+) 34.Rc1 (34.Rb2 Nb2 35.Kc2 Nc4–+) 34...Ra3 35.Rc3 Rc3 (better 35...Rd2 36.Ke4–+) 36.Kc3 Rf2 37.Kb4 Nd6 (better 37...Ne3!? 38.g3–+) 38.Kc5 Nf5 39.Kb5 Ne3 40.Kc5 Rg2 41.h4 Rh2 42.h5 Rh5 43.Kd6 Rd5 44.Kc6 Rd4 45.Kc7 e5 0–1. anotherheaven (1720) – fokers (1865), lichess.org, 2015.

3.c3 Nd7 4.d3 Ngf6 5.e3 e6 6.Nf3 Be7 7.Be2 0–0 8.0–0 h6 9.a3 a5 10.d4 b6 11.Nbd2 Bb7 12.Bd3 ab4 13.ab4 c5 14.bc5 bc5 15.Ra8 Qa8 16.Qa1 (16.c4 cd4 17.Bd4 dc4 18.Bc4 Bb4=) 16...cd4 (16...c4 17.Bc2+=) 17.cd4= Rc8 18.Qa8 Ba8 19.Ra1 Bb7 20.Rc1 (20.Ra7 Rb8+=) 20...Nb6 21.Rc8 Nc8 22.Ne5 Bd6 23.Ndf3 Be5 24.Ne5+= Ne7 25.Bb5 Ng4?? 26.Ng4+– Nf5 27.Ne5 f6 28.Nf3 Kf7 29.g4 Nd6 30.Ba4 Nc4 31.Bc3 Ba6 32.Nd2 Nd6 33.f3 Be2 34.Kf2 Bc4 35.Nc4 Nc4 36.Bb5 Ke7 37.Bc4 dc4 0–1. Fournier,Frederic – FvG, Partie evaluee, 1m + 0s, 2008.

3.c3 Nf6 4.a3 g6 (4...Nbd7 5.d4+=) 5.d4 Bg7 6.e3 Qc7 7.Nf3 Bg4 8.Be2 h5 (8...Nbd7 9.0–0=) 9.Nbd2+= Ne4 (9...Nbd7!?+=) 10.Ne4+/– de4 11.Nd2 (11.Ng5 Be2 12.Qe2 Nd7+/–) 11...Be2 12.Qe2 f5 13.0–0–0 (13.0–0 Nd7+=) 13...0–0 14.f3 ef3 15.Nf3 e6 16.e4 Nd7 17.ef5 ef5 18.Rhe1 Nf6 19.Qd3 (better is 19.Qe6!? Kh7 20.Qe7+=) 19...Ne4+= 20.Nd2? (better is 20.Qc4 Kh7 21.a4+=) 20...Rfe8?? (better is 20...Nf2 21.Qc4 Kh7–+) 21.Ne4+/– fe4 22.Re4 Re4 23.Qe4 Rf8 24.Qe6 Kh7+= 25.g3 h4 26.gh4 Qf4 27.Kb1 Qh4 28.Re1 Qh2 29.Bc1 Qh5 30.Qe2 Qf5 31.Kb2 Rf7 32.Rh1 Kg8 33.Qe8 Rf8 34.Qe1 g5 0–1. Fournier,Frederic – Unblitz, Partie evaluee, 1m + 0s, 2007.

3.Nc3 Bf5 4.a3 e6 5.d3 Nf6 6.e3 Bd6 (6...c5 7.bc5 Bc5 8.Nf3=+) 7.Nce2 (7.Be2!?=) 7...0–0–/+ 8.Ng3 Bg6 9.h4 Nh5?? (better 9...h5–/+) 10.Nh5+– e5 11.Ng3 e4 (11...h6 12.Nf3 Nd7 13.c4+–) 12.d4 (better 12.h5 Bg3 13.hg6 Bf2 14.Kf2 fg6 15.Ke2 ed3 16.cd3 Nd7+–) 12...f5 (12...h6 13.N1e2+–) 13.h5 Be8 14.c4 (14.h6 g5+–) 14...f4 15.N3e2 (better 15.ef4 Bf4 16.Nh3 Bg3 17.fg3 a5+–) 15...Qf6?? (better 15...fe3 16.fe3 Qg5+–) 16.ef4 (16.Nf4 Bf4 17.ef4 Qf4+–) 16...Bf4 (16...dc4 17.h6! gh6 18.Ng3+–) 17.Nf4 Qf4 18.Nh3 Qf5 19.g4 Qf6 20.cd5 cd5 21.Qb3 Nc6 (21...Bf7 22.g5 Qd6 23.Be2+–) 22.Rd1 (22.Qd5!? Bf7 23.Qg5 Rad8 24.Qf6 gf6+–) 22...Rd8 23.Bg2 (23.Be2 a6+–) 23...Bd7 (23...Qh4 24.Qg3 Qg3 25.fg3+–) 24.Qg3 White plans g5 (24.Qd5 Be6 25.Qg5 Qg5 26.Ng5 Bg4+–) 24...Rde8 (24...Qe6 25.g5+–) 25.0–0 g6 (25...Rc8 26.f3 e3 27.Rfe1+–) 26.g5 Qf5 27.hg6 Qg6 28.Nf4 Qg7 (28...Qf7 29.Ne2 Qh5+–) 29.Nd5 Rf5 (29...Kh8 30.Nc7 Re7 31.b5+–) 30.Nf4 (30.Nf4 Rg5 31.Qe3+–) 1–0. beatmeeasy (1925) – v_oliv (1965), lichess.org, 2020.

3.d3 a5 4.ba5 Qa5 5.Bc3 Qb6 6.Bd2 (6.Nf3!?=) 6...e5 7.Nc3 Nf6 8.Rb1 Qc7 9.Bg5 d4 10.Bf6 dc3 11.Bg5 Ra2 12.Nf3 f6 13.Bh4 h5 (13...Na6 14.e3–+) 14.Bg3 Bf5 (14...Na6 15.Rc1–+) 15.e4 Bg4 16.h3 Bf3 17.gf3 h4 18.Bh2 g5 (18...Na6 19.Rc1–+) 19.d4–/+ Bd6 20.d5 (20.de5 fe5 21.Rg1 Be7–/+) 20...Nd7 (20...Rb2 21.Bc4–+) 21.Bc4 Ra4 22.Bb3 (22.Qe2 b5 23.Bb3 Ra5 24.dc6 Nb8–/+) 22...Rd4–+ 23.Qe2 Nc5 24.0–0 Nb3 25.Rb3 cd5 26.Qb5 Qc6 27.Qb7 Qb7 28.Rb7 de4 29.fe4 Kd8 (29...0–0 30.Ra1 Rf7 31.Ra8 Kg7 32.Rb6–+) 30.f3 (30.Ra1!? Kc8 31.Rf7=+) 30...Kc8 31.Rb6 (31.Rb3 Bc5 32.Kh1 Rc4–+) 31...Rd2 (better 31...Rh7–+) 32.Ra1?? (better 32.Rc6 Kd7 33.Rc3–+) 32...Bc5 33.Kh1 Rhd8 (better 33...Bb6 34.Ra8 Kb7 35.Rh8 Rc2 36.Rh7 Bc7–+) 34.Rc6+= Kb7? (34...Kd7 35.Rc5 Rc2=) 35.Rc5+– Rc2 36.Rb1 Ka6 37.Rc6 Ka5 38.Rc7 (38.Bg1 Rb2 39.Rc1 c2 40.R1c2 Rc2 41.Rc2 Rd6+–) 38...Ka6? (38...Rb2 39.Rc1 Rdd2+–) 39.Rc4 (39.Rb3 Ra8+–) 39...Ka5 40.Bg1 Rb2 (better 40...Rd3 41.Rc7 Rb2 42.Ra1 Kb5+–) 41.Rc5?? (better 41.Ra1 Kb5 42.Rc3+–) 41...Kb4= 42.Rc1 Rd3 43.Rc6 Rf3?? (better 43...Kb3 44.Rb6 Ka2 45.Ra6 Kb3 46.Rb6 Ka2 47.Ra6 Kb3 48.Rb6=) 44.Rb6+– Ka5?? (44...Kc4 45.Rb2 Rh3 46.Kg2 g4+–) 45.Rb2 (45.Ra1 Ra2 46.Ra2) 45...cb2–+ 46.Rb1 Rh3 47.Kg2 Rb3 48.Be3 (48.Bc5 Kb5 49.Be7–+) 48...Kb4 (48...Re3 49.Rb2 Re4 50.Rf2–+) 49.Bd2 (49.Bb6 h3 50.Kh2 Kc3–+) 49...Ka3 50.Kh2 Ka2 51.Rg1 b1Q 52.Rb1 Rb1 53.Ba5 (53.Be3 Rb2 54.Kg1 g4–+) 53...Rb5 (better 53...g4 54.Kg2–+) 54.Bd8 Rb4 (better 54...g4 55.Bf6 h3 56.Bh4–+) 55.Bf6 Re4 56.Bg5 Kb3 57.Kh3 Kc4 58.Bh4 (58.Bf6–+) 58...Rh4! 59.Kh4 Kd3 60.Kg3 e4 61.Kf2 Kd2 62.Kf1 e3 63.Kg2 e2 64.Kf3 e1Q 65.Kf4 Qe3 (65...Qe6 66.Kf3 Qf5 67.Kg2 Ke3 68.Kg3 Qg6 69.Kh4 Kf4 70.Kh3 Qg3) 66.Kf5–+ Kd3 67.Kg4 (67.Kf6 Qd4 68.Kf5 Qd7 69.Ke5 Ke3 70.Kf6 Ke4 71.Kg6 Qe6 72.Kg5 Qf5 73.Kh6 Qf7 74.Kg5 Qg7 75.Kh5 Kf5 76.Kh4 Qg4) 67...Kd4 (67...Ke4 68.Kh5 Kf5 69.Kh4 Qg1 70.Kh3 Kf4 71.Kh4 Qg4) 68.Kf5 Qe4 (68...Kd5 69.Kf6 Qf4 70.Ke7 Qf5 71.Kd8 Qf7 72.Kc8 Kc6 73.Kd8 Qd7) 69.Kf6 (69.Kg5 Ke5 70.Kh6 Qg4 71.Kh7 Kf6 72.Kh6 Qg6) 69...Kd5 70.Kg5 (70.Kf7 Qf5 71.Kg7 Ke6 72.Kh6 Qg4 73.Kh7 Kf6 74.Kh6 Qg6) 70...Qe5 (70...Ke5 71.Kh6 Qg2 72.Kh5 Kf5 73.Kh4 Qg4) 71.Kg4 (71.Kg6 Ke6 72.Kh6 Kf6 73.Kh7 Qc7 74.Kh6 Qh2) 71...Kd6 (71...Ke4 72.Kh4 Qg7 73.Kh5 Kf5 74.Kh4 Qg4) 72.Kf3–+ Qd5 73.Kf2 (73.Ke3 Ke5 74.Kf2 Qd3 75.Kg2 Kf4 76.Kf2 Qd2 77.Kf1 Kf3 78.Kg1 Qg2) 73...Qd4 (73...Qd3 74.Kg2 Ke5 75.Kh2 Kf4 76.Kg2 Qd2 77.Kf1 Kf3 78.Kg1 Qg2) 74.Ke2 (74.Kg3 Ke5 75.Kg2 Kf4 76.Kh2 Qd2 77.Kh3 Kf3 78.Kh4 Qh6) 74...Ke5 75.Kf3 Qe4 (75...Qd5 76.Kg3 Qd3 77.Kg2 Kf4 78.Kf2 Qd2 79.Kf1 Kf3 80.Kg1 Qg2) 76.Kf2 (76.Kg3 Qe2 77.Kh4 Qh2 78.Kg4 Qg2 79.Kh5 Kf5 80.Kh4 Qg4) 76...Kf5 (76...Kf4 77.Kf1 Kf3 78.Kg1 Qg6 79.Kf1 Qb1) 77.Kg3 Qe3 (77...Qe3 78.Kg2 Kf4 79.Kf1 Qc1 80.Kg2 Qd2 81.Kf1 Kf3 82.Kg1 Qg2; 77...Qf4 78.Kg2 Kg4 79.Kg1 Kg3 80.Kh1 Qc1) 0–1. beatmeeasy (1910) – hasanovic (1925), lichess.org, 2020.

3.d3 Nd7=+ 4.Nd2 e5 5.a3 Bd6 6.e4 Ngf6 7.Ngf3 a5 8.c3 0–0 9.g3 b5–/+ 10.Bg2 Nb6 11.0–0 Na4 12.Qc2 Nb2 13.Qb2 ab4 14.cb4 (14...d4 15.Qc2–/+; 14.ab4 Ra1 15.Ra1 Qe7=+). brawn – Klaus Behrmann, ChessWorld.net, 2005.

3.d4 a5 4.a3 a4 5.Nf3 b5 6.e3 Nf6 7.Nbd2 Nbd7 8.Be2 g6 9.0–0 Bg7 10.h3 Nb6 11.Bd3 h6 12.Re1 Nfd7 13.e4 e6 14.ed5 Nd5 15.Be4 N7f6 16.Bd5 Nd5 17.Nf1 0–0 18.Ne3 Ne3 19.fe3 Qe7 20.Rc1 Bb7 21.c4 bc4 22.Rc4+= Rfd8 23.Qc1 The isolani on c6 becomes a target 23...Rd7 24.Rc2 Ba6 25.Rc6 Bb5 26.Rc8 Rc8= 27.Qc8 Qd8 28.Qd8 Rd8 29.Rc1 Bf6 30.Rc5 Rb8 31.Kf2 Kh7 32.Ba1 Rb7 33.Bb2 Be7 34.Rc1 Bf6 35.Rc5 Be7 36.Rc1 Bf6= 37.Rc5 (better is 37.Nd2+/–) ½–½. M8IN3 – gasman, Live Game Caissa's Web, 2005.

3.d4 b5 4.g3 (4.a4 Qd6 5.c3 ba4 6.Qa4 Nf6+=) 4...e5 (4...a5 5.Nf3+=) 5.a3 (5.de5!? Bb4 6.Nd2+=) 5...ed4 (5...e4 6.Nc3=) 6.Bd4. Baer,Cy (1895) – Nackas,Hans Juergen (1650), RSS7E basic–3, 2008.

3.d4 e5 4.a3 ed4 5.Nf3 a5 6.Qd4 ab4 7.ab4 Ra1 8.Ba1 Bf5 9.Qe5 Ne7 10.Qb2 Nd7 11.Nbd2 b5 12.e3 Nf6 13.Be2 Qd7 14.0–0 Ng6 15.Nd4 White launches an attack 15...Bd6 16.Rd1 0–0 17.c4+= bc4 18.Nc4 Bc7 19.Na5= Qd6 20.g3 Ba5 Exerts pressure on the isolated pawn 21.Nf5 Qb4 22.Nh6! gh6 23.Qf6 d4 24.Bd4 Qd4 25.Qd4 Rc8 26.Qc5 Bd8 27.Rd6 Nf8 28.Ba6 Rb8 29.Rh6 Ng6 30.Qc6 Kg7 31.Rh5 Rb2 32.Qc3 Bf6 33.Rh7 Kh7 34.Qf6 Rd2 35.Bc4 Nh8 36.Bf7 Nf7 37.Qf7 Kh6 38.Kg2 Kg5 39.h4 Kh6 40.Qg8 Rc2 41.Qg5 Kh7 42.Qf5 Kh6 43.Qc2 Kg7 44.h5 Kh8 45.h6 Kg8 46.Qf5 Kh8 47.Qf6 Kh7 48.Qg7 1–0. NN – SuperForte 5 Mhz, 1993.

3.d4 Nf6 4.Nc3 Bf5 5.Nf3 e6 6.a3 Bd6 7.g3 a5 8.ba5 Qa5 9.Bg2?? Ne4–+ 10.0–0 Nc3 11.Bc3 Qc3 12.Qd2 Qd2 13.Nd2 Bc2 14.f4 Ra3 15.Ra3 Ba3 16.Ra1 Bb2 17.Ra8 Bd4 18.Kf1 0–0 19.Ra2 Bg6 20.Nf3 Be3 21.Ne5 Bf5 22.Ra8 Na6 23.Rf8 Kf8 24.Nd7 Ke7 25.Ne5 f6 26.Nf3 Nc5 0–1. I need chocolate – Whiterose, ChessWorld.net, 2005.

3.e3 Na6 4.a3 b5 5.Nf3 Nf6 6.Bd3 Bg4 7.h3 Bh5 8.Nc3 Qd6 9.0–0 Nc7 10.g4 (10.Na2 e6=) 10...Bg6=+ 11.Ne2 e5 (better 11...Nd7!?=+) 12.Ne5 Qe5?? (better 12...a5+–) 13.Be5+– Ne6 14.f4 Ne4 (14...Nd7 15.Bc3 Bd3 16.cd3+–) 15.f5 f6 16.Bh2 N6g5 17.h4 h6 (17...Nh3 18.Kg2 Nhf2 19.Rf2 Nf2 20.Kf2+–) 18.hg5 hg5 19.fg6 0–0–0 20.c4! Bd6 (20...bc4 21.Qa4 Combination; 20...dc4 21.Be4 Deflection) 21.Bd6 Rd6 22.cd5 cd5 23.Qc2 Kd7 24.Bb5 Ke7 (24...Kd8 25.Rac1 Rh1 26.Kh1 Nf2 27.Rf2 Ke7 28.Qc7 Ke6 29.Rf5 Rc6 30.Rc6) 25.Qc7 Ke6 26.Nd4 (26.Nd4 Ke5 27.Rf5) 1–0. Tyhla – Hexeq, internet, 2017.

3.e3 Bd7 4.c4 f6 (4...Nf6 5.Nf3=) 5.a4 (5.cd5 e5 6.dc6 Nc6+–) 5...dc4 (5...e5 6.b5=+) 6.b5 (6.Bc4 Bf5+=) 6...e5 7.Bc4 Ne7 8.Nf3 (8.Qb3 Qa5+=) 8...Nd5 (8...Nf5 9.Nc3=) 9.0–0 Be6 10.d4 (10.Qb3 Nd7 11.d4 e4+=) 10...e4 (better 10...Ne3 11.fe3 Bc4 12.de5 Bf1 13.Qd8 Kd8 14.Kf1 Nd7–/+) 11.Nfd2+= f5 12.Nc3 Bb4 13.Qb3 White launches an attack 13...Bc3 14.Bc3 0–0 15.f3 ef3 16.Rf3 Nd7 17.Raf1 (17.Bb4 Re8+=) 17...N7f6 (17...N7b6 18.e4 Nc4 19.Qc4 cb5 20.ab5=+) 18.Bb2 (18.e4 fe4 19.Ne4 Bf7 20.Nf6 Nf6 21.Bf7 Rf7+=) 18...a6 (18...cb5 19.Qb5 Re8 20.Qb3= (20.Qb7? Rb8 21.Qa7 Rb2–+; 20.Rf5 Ne3 21.Be6 Re6=+)) 19.e4 fe4 20.Ne4 Ne4? Exploits the pin (better 20...ab5 21.ab5 Bf7 22.bc6 A) 22...Ne4?? 23.Rf7 Rf7 24.Bd5 bc6 A1) 25.Rf7?! Qd5 (worse 25...cd5 26.Qb7 Nf6 27.Rg7 Kh8 28.Rg3+–) 26.Qb7 Qf7 27.Qa8 Qf8 28.Qa2 Kh8=; A2) 25.Be4+–; B) 22...bc6+=) 21.Rf8+– Theme: Double Attack 21...Qf8 22.Rf8 Kf8 (22...Rf8 23.bc6 Nd2 24.Qa3 bc6 25.Bd3+–) 23.ba6 ba6 24.Qb7 Re8 (24...Rc8 25.Ba3 Kg8 26.Qa6+–) 25.Qc6 Nf4 (25...Nef6+–) 26.Ba3 Kg8 27.Qe4 (27.Qe8) 27...Bf7 (27...Kh8 28.Be6 Ne6+–) 28.Qe8 1–0. BeepBeepImAJeep (2680) – Nabeelchess (1945), lichess.org, 2016.

3.e3 Be6 4.Be2 Nd7 5.Nf3 f6 (5...Bg4 6.a3=) 6.Nc3 Nh6 7.0–0 Nf7?? (better 7...Bf7+=) 8.Nd4+– Ng5 9.f4 (9.Ne6?! Ne6 10.f4 Nc7+–) 9...Bf7 (9...Nh3 10.gh3 Bh3 11.Bh5 g6 12.Rf3+–) 10.fg5 e5 11.Nf3 (11.Nf5 g6 12.Ng3 Bb4 13.gf6 0–0+–) 11...e4 12.Nd4 fg5 (12...Bb4 13.a3 Be7 14.Nf5+–) 13.Na4 Bb4 (13...Qc7 14.Nf5 Rg8 15.a3+–) 14.a3 (14.Nf5 Bf8 15.Bg7 Rg8 16.Bf8 Nf8+–) 14...Bd6 (14...Bf8 15.Bh5 Nf6 16.Bf7 Kf7 17.Qh5 Kg8 18.Qg5+–) 15.Nf5 Bf8 16.Bg7 Rg8 17.Bf8 Nf8 18.Nc5 b6 (18...Rb8 19.Qe1 Qc7+–) 19.Nb7 Qc7 (19...Bg6 20.Nd8 Rd8 21.Nd4+–) 20.Nfd6 Ke7 21.Rf7 (21.Rf7 Ke6 22.Bg4 Ke5 23.Qf3 ef3 24.d4) 1–0. Karl – Pipes, internet private, 2018.

3.e3 g5?? 4.Bh8+– b6 (4...Nf6 5.Nf3+–) 5.Nf3 Qd6 (5...Bg4 6.h3 Bh5 7.Be2+–) 6.Ng5 Bf5 7.g4 (better is 7.c3 e5+–) 7...Bh6 (7...Bc8 8.f3+–) 8.gf5 Bg5 9.Qg4 Qh6 (9...h6 10.h4 Nf6 11.Qd4+– (11.hg5?! Ng4 12.Be2 Qb4+=)) 10.h4 Nf6 (10...Bf6 11.Qg8 Kd7 12.Nc3+–) 11.Qg5 Qf8 12.Bg7 Qg8 13.Bf6 Qf8 14.Bg7 Qg8 15.f6 ef6 16.Qf6 Nd7 17.Qc6 Ke7 18.Nc3 Qb8 19.Nd5 Ke8 (19...Kd8 20.Bb5 Qb7 21.Qb7 Ne5 22.Qa8) 20.Nf6 Ke7 (20...Kd8 21.Qd7) 21.Qd7 1–0. pierre – EFOX3, ChessWorld.net, 2005.

3.e3 h5 4.Nf3 Nf6 5.h3 b5 (5...Nbd7 6.a3=) 6.d3 (6.a4 ba4 7.Ra4 Nbd7+=) 6...Qc7 7.Be5 Qd8 8.c4 (8.a4 Nbd7+=) 8...Nbd7 9.Bb2 a6 (9...a5 10.cb5 cb5 11.Nbd2=) 10.Nd4 (10.a3 a5+=) 10...dc4 (10...e5!? 11.Nc2 h4=) 11.dc4+= Bb7 12.c5 e5 13.Nf5 g6 14.Nd6 Bd6 15.Qd6 Ne4 16.Qd3 Ndf6 (better is 16...Qh4!? 17.g3 Ng3 18.fg3 Qg3 19.Ke2 Rd8+/–) 17.Qd8 Rd8 18.Be5 Rd5 19.Bf6 Nf6 20.Nc3 Rd7 21.Be2 0–0 22.0–0 Rd2 23.Rad1 Rfd8 24.Rd2 Rd2 25.Rd1 Rd7 (better is 25...Rc2!? 26.Rd3 Kg7+/–) 26.Rd7+– Nd7 27.g4 (27.Ne4 Ba8+–) 27...h4 (27...a5 28.a3+–) 28.Ne4 Ne5 29.Nd6 Ba8 30.f4 Nd7 31.f5 (31.g5!? a5 32.Bg4 Nb8+–) 31...g5 32.e4 (32.Kf2 f6+–) 32...Kg7 33.a3 Kf6 34.Bf3 Ne5 35.Be2 (35.Bg2 Nc4 36.e5 Ne5 37.Ne4 Ke7 38.Ng5 f6+–) 35...Ke7 (35...Nd7 36.Bd1 Ke7+–) 36.Kf2+– Nc4? (better is 36...Nd7+–) 37.Nc4 bc4 38.Bc4 Bb7 39.Ke3 Kf6 40.Kd4 Ke7 (40...Bc8 41.a4+–) 41.e5 (41.Ke5 f6 42.Kd4 Kf8+–) 41...f6 (41...Bc8 42.e6 fe6 43.Be6 Be6 44.fe6 Ke6 45.a4+–) 42.e6 Bc8 43.a4 Bb7 44.b5 (better is 44.Bd3 a5+–) 44...cb5 45.ab5 ab5 46.Bb5 Bg2 47.c6 Bh3 (47...Kd6 48.e7! Bc6 49.Bc6 Ke7+–) 48.c7 Kf8 49.c8Q Kg7 50.Qd7 Kh6 51.Qf7 Bg4 52.Qf8 (52...Kh7 53.Qe7 Kh8 54.Qe8 Kg7 55.Qg6 Kh8 56.e7 Bf5 57.e8Q; 52.Qg6) 1–0. maaxa – Practice007, Live Game Caissa's Web, 2004.

3.e4 Nf6 4.ed5 cd5 5.d3 (5.a3 e6=) 5...Bf5 6.b5 (6.a3 e6=+) 6...e6 (6...Qa5 7.Nd2–/+) 7.c4 (7.Nf3 Bc5=+) 7...dc4–/+ 8.dc4 Bb4 9.Bc3 Qd1 10.Kd1 Bb1 (better 10...Bc5!? 11.f3 Nbd7–/+) 11.Bb4= Bf5 12.Nf3 Nbd7 13.g3 (13.Ke1 Rc8=) 13...0–0–0 (13...Rc8 14.Nd2=+) 14.Bg2 (14.Ke2 e5=) 14...Nc5 (14...Ne5! 15.Ke2 Bd3 16.Ke1 Nc4–/+) 15.Ke2= Nd3 16.Bc3 Ne4 (16...e5!? 17.Rhd1 e4=) 17.Rhf1?? (better 17.Bg7 Rhg8 18.Bd4+–) 17…Nc3–+ (17...Nc3 18.Kd2 Na4–+) 0–1. RichardSommer (2085) – BangBangBangDrama (2105), lichess.org, 2020.

3.f3 Nd7 4.e4 de4 5.fe4 e5 6.Ke2 (6.Nf3!? Bb4 7.Bc4–/+) 6...Ngf6 7.Ke3 (7.a3–+) 7...Qb6 8.d4 Bb4 9.Qd3? (9.Nf3 Bc5 10.Bc3 ed4 11.Bd4 Qb2–+) 9...Ng4 (better 9...Ba5 10.Qb3 ed4 11.Ke2 Ne4 12.Qb6 Bb6 13.Nf3–+) 10.Ke2 f5! 11.Nf3?? (11.ef5 Bc5 Combination) 11...ed4 (better 11...fe4 12.Qe4 Ndf6–+) 12.ef5 Nde5 (better 12...Nc5 13.Qd4 Bf5–/+) 13.Nd4?? (better 13.Ne5 Ne5 14.Qd4–/+) 13...Nd3–+ 14.Kd3 Bf5! 15.Ke2 (15.Nf5 Nf2 Double attack) 15...0–0–0 16.Nf5 (16.Kd1 Rd4 17.Bd4 Qd4 18.Kc1 Qf2 19.Bd3 Bd3 20.cd3 Ne3 21.Nd2 Qd2 22.Kb1 Qc2) 16...Rhe8 (16...Qf2) 17.Kf3 (17.Ne7 Re7 18.Kf3 Qe3 19.Kg4 Re4 20.Kh5 g6) 17...Nf6 (17...Qf2 18.Kg4 Re4 19.Kh3 Qf5 20.Kg3 Be1) 18.Bc4 (18.Bf6 gf6 19.c3–+) 18...Qc5 19.Bb3 Qf5 20.Kg3 Qg4 (20...Re3 21.Kh4 Qg4) 21.Kf2 Qf4 22.Kg1 Re1 0–1. anotherheaven (1905) – mordor1 (2145), Aronian Arena, 2015.

3.Nf3 Na6 4.a3 Nc7 5.e3 Bg4 6.Be2 e6 7.0–0 Nf6 8.d3 Nb5 9.Nbd2 Nd6 10.Ne5 Bf5 11.f4 h5 12.Ndf3 Bg4 13.Ng5 Be2 14.Qe2 Ng4 15.Ng4 hg4 16.Qg4 f5 17.Qg3+/– Qe7 18.Be5 Rh6 19.Nh7 Qh4?? 20.Qh4+– Rh4 21.Nf8 Kf8 22.Bd6 Kf7 23.c4 Rah8 24.h3 R4h5 25.cd5 ed5 26.Rab1 R8h7 27.b5 Ke6 28.Bb8 a6 29.ba6 ba6 30.Rb6 Kd7 31.Ra6 Kc8 32.Rb1 R7h6 33.Be5 c5 34.Ra7 (34...Rb6 35.Rb6 Rh3 36.Rb8#) 1–0. Cerny,Thorsten – Kalweit,Werner, Schleswig Holstein–ch, 1991.

3.Nf3 Qc7 4.e3 e5 5.Be5 Qd8 6.b5 Nd7 7.bc6 bc6 8.Bd3 f6 9.Bg3 Bc5 10.Nc3 Ne7 11.0–0 0–0 12.Rb1 Re8 13.Na4 Bb6 14.Nb6 ab6+= 15.Bd6 Nf8 16.Be7+/– Re7 17.Nd4 Ne6?? 18.Nc6+– Qc7 19.Ne7 Qe7 20.Rb6 Nc5 21.Rb2 Be6 22.Qf3 Nd3 23.cd3 Re8 24.Rfb1 h6 25.Rb7 Qd6 26.g3 Kh7 27.R1b6 Qe5 28.d4 Qg5 29.Rb8 Bf7 30.Re8 Be8 31.Re6 Bf7 32.Re7 Qg6 33.a4 Qb1 34.Kg2 Qc2 35.Rf7 Qa4 36.Qf6 (36...Qd4 37.Rg7 Kh8 38.Qh6; 36.Qg4 Qd4 37.Qg7) 1–0. milanista – rla, internet, 2007.

3.Nf3 h5 4.g3 Bg4 5.Bg2 Bf3 6.Bf3 Qc7 (6...Nf6 7.c4=) 7.c4+= Nf6 8.cd5 h4 (better 8...Nd5!? 9.a3 h4+=) 9.Qa4 hg3 (9...e5 10.de6! fe6 11.Nc3+–) 10.hg3 Rh1 11.Bh1 Nd5? (better 11...g6+–) 12.Bd5 Qd6 13.Bg2 e6 14.b5 g6 (14...a6 15.Nc3+–) 15.Na3 Bh6 (15...Qd7 16.Be5 Ba3 17.Qa3+–) 16.Nc4 Qc5 (16...Qd7 17.bc6 Nc6+–) 17.d4 Qg5 (17...cb5 18.dc5 ba4 19.Bb7+–) 18.bc6 b5 19.c7 Na6 20.Qa6 Kf8 21.Ba8 bc4 22.c8Q Kg7 23.d5 e5 24.Qe8 Qd2 25.Kf1 c3 (25...Qd4 26.Qe5 Qe5 27.Be5 Kh7 28.Qf6 g5 29.Qf7 Bg7 30.Qg7) 26.Qa7 Kh7 (26...Qf4 27.gf4 Bf4 28.Qaf7 Kh6 29.Qg6) 27.Qef7 Bg7 (27...Kh8 28.Qh7) 28.Qg7 1–0. Adlai – Gaptse, internet, 2021.

3.f4 Qd6=+ 4.e3 Qb4 5.Qc1 Nf6 6.a4 Bg4 7.Ba3 Qa5 8.Nc3 Nbd7 9.h3 Bf5 10.Nf3 e6 11.Bf8 Rf8 12.g4 Be4 13.Be2 (13...Bf3 14.Bf3–/+). grandmaster goldberg – Klaus Behrmann, ChessWorld.net, 2005.

3.f4 f5 4.Nf3 e6 5.Nc3 Nf6 6.a3 Nbd7 (6...c5 7.bc5 Bc5 8.e3=) 7.e3 (7.Nd4 Nb6 8.e3 Bd6=) 7...Bd6 8.Bd3 (8.Nd4 Qe7=) 8...0–0 9.0–0 Ne4 (9...Qe7 10.Qe2=) 10.Qe2 (10.Be2 Qe7=) 10...Qe7 11.Rab1 (11.Na4 b5 12.Nc5 Ndc5 13.bc5 Nc5=+) 11...Ndf6 12.Ne5 (12.Be4 fe4 13.Ne5 Bd7=) 12...Nd7 (12...a5 13.Be4 ab4 14.Bf3 bc3 15.Bc3 Ba3 16.Ra1=) 13.Na4 (13.Nf3 Ndf6=) 13...Be5=+ 14.fe5 Ng5 (14...b5 15.Nc3=+) 15.b5 c5 (15...Nf7 16.c4=+) 16.c4 b6 17.cd5 (17.Rf4 Bb7=) 17...ed5 18.h4 (18.Rf5 Rf5 19.Bf5 Ne5=) 18...Ne4=+ 19.Be4 de4 20.Qc4 Kh8 21.Qd5 Rb8 22.Qd6 Qh4?? (better 22...Qd6 23.ed6 Ra8=) 23.e6+– Rb7 (23...Qg5 24.ed7 Bd7 25.Qd7 Rbd8+–) 24.ed7 (24.ed7 Qd8 25.dc8Q Qc8 26.Rf2+–) 1–0. Fagan – Beppo, internet corr, 2018.

3.f4 f6 4.e3+= Nd7 (4...Qd6+=) 5.Qh5 (5.Bd3!? Nh6 6.Nf3+=) 5...g6=+ 6.Qh4 Nb6 (6...Nh6 7.Nf3=+) 7.Nc3 Qc7 (7...Nh6 8.Nf3=) 8.Nf3 (8.Bd3 Nh6=) 8...Bd7 (8...Nh6 9.Bd3=) 9.Bd3+= 0–0–0 (9...Bg7 10.0–0+=) 10.b5 (10.0–0+=) 10...c5? (better 10...Nc4 11.Bc4 dc4+=) 11.a4+– c4 (better 11...Be6+–) 12.Be2 Na8 (12...Nh6 13.a5 Na8 14.Nd5+–) 13.Nd5 Qd6 14.Bc4 (better 14.e4 Be6 15.Bc4 Nh6+–) 14...e6 (14...Be6 15.e4 Nc7 16.Ba3+–) 15.Nf6 Nf6 (15...Be7 16.Ba3 Bf6 17.Bd6 Bh4 18.Nh4 Nh6+–) 16.Bf6 Re8 (16...g5 17.Ng5 Qb4 18.Bd8+–) 17.Bh8 Be7 (17...h5 18.Bd3 Be7 19.Bf6+–) 18.Qh7 Nb6 19.Bd3 Nd5 20.Be5 Qb4 21.0–0 g5 22.fg5 Qc5 23.c4 Nb4 24.Bg6 Kd8 25.Be8 Be8 26.g6 Qc4 27.g7 (27.Rac1 Qd5 28.Bc7 Kc8 29.g7 Nc6 30.g8Q Kc7 31.Qe8 Kb6 32.bc6 Ka5 33.Qhe7 Qd6 34.Rc5 Ka4 35.cb7 Ka3 36.Ra1 Kb2 37.Qd6 Ka1 38.b8Q e5 39.Ra5) 27...Nd3 28.g8Q Ne5 (28...Nf4 29.Qhf7 Qc6 30.bc6 Ne2 31.Kf2 Bh4 32.Nh4 bc6 33.Qge8) 29.Ne5 Qe4 (29...Qc6 30.bc6 bc6 31.Qe8 Kc7 32.Qhe7 Kb6 33.Nc6 a6 34.Rab1) 30.Qe8! Ke8 (30...Ke8 31.Qg8) 31.Qg8 Bf8 32.Qf8 1–0. Leonco – Tyfoon, internet corr, 2018.

3.f4 h6 4.Nf3 (4.e3 Nf6=) 4...e6 (4...Qd6 5.e3 Qb4 6.Bd4=+) 5.Nc3 (5.e3 Nf6 6.a3 Be7=) 5...Nf6 (5...Bb4 6.e3=+) 6.e3 (6.a3 Bd6=) 6...Bb4–/+ 7.Be2 Bd6 8.0–0 (8.Rb1 0–0–/+) 8...c5 (8...Bf4!? 9.ef4 Qb6 10.d4 Qb2–/+) 9.Nb5=+ Be7 10.Be5 Na6 11.Qe1 Bd7 12.Qg3 0–0 13.a3 Bb5 14.Bb5 Nc7 15.Be2 Ne4?? (better 15...Bd6=+) 16.Qg7 1–0. Janek – Diftt, internet, 2019.

3.g3 Qb6 4.Nc3 Qb4–/+ 5.Qc1 e5 6.Bg2 Nd7 7.a4 Qa5 8.e3 Ngf6 9.Nge2 Bd6 10.0–0 0–0 11.Ba3 Ba3 12.Ra3 e4 13.f4 ef3! 14.Bf3 (14.Rf3 Ne5 Decoy; 14.Bf3 Ne5 Decoy) 14...Ne5 15.Bg2 Nc4 16.Ra1 Qd8 17.Nd1 Bg4 18.Nd4 Ne4 (better is 18...c5!? 19.Nb3 Qe7–/+) 19.d3+= Bd1 20.Rd1 Nc3 21.dc4 Nd1 22.Qd1 dc4 23.Qg4 Qb6 24.Be4 Rae8 25.Rf1 g6 26.c3 (better is 26.Kh1!?+=) 26...Qa5 27.Rc1? (better is 27.h3!?–/+) 27…Qe5–+ (27...Qa4?! 28.Rb1–/+) 0–1. Clere,Philippe – Dalleur,JP, FRA AJEC80 corr, 1988. (=1.g3 d5 2.b4 c6 3.Bb2 Qb6)

3.g3 Qc7 4.d4 Nf6 5.e3 Bf5 6.c4 dc4 7.Bc4 e6 8.Nf3 (8.a3 Bd6+=) 8...Be7 (8...Bb4 9.Nbd2–/+) 9.Nbd2 (9.a3 b5 10.Bd3 Bd3 11.Qd3 a5+=) 9...Nbd7 (9...Bb4 10.Qb3 Qe7 11.a3–/+) 10.0–0 (10.b5 0–0+=) 10...h6 (10...Bb4 11.Qb3 Qd6 12.a3 Bd2 13.Nd2–/+) 11.Re1 (11.b5 cb5 12.Bb5 0–0=) 11...Nb6 12.Bb3 (12.a3+=) 12...a5 (better is 12...Bb4!? 13.a3 Ba5–/+) 13.ba5 Ra5 14.Ne5 0–0 15.e4 Bh7 16.Qf3 Na4 17.Ba4 Ra4 18.Qb3 Rfa8 19.f3 Nd7 20.Nd3 (20.Nd7!? Qd7 21.Nc4+=) 20...Bf6–/+ 21.e5 Be7 22.Ne4 Nb6 23.Rec1 Be4 (23...Nd5!?–/+) 24.fe4+= Bg5 25.Nc5 R4a5 26.Rf1 Rb5 27.Qc3 Na4 28.Na4 Ra4 29.Rf3 (29.Rf2!?+=) 29...Qb6–/+ 30.Qd2?? (better is 30.Rf2–/+) 30…Rd4 (30...Rd4 31.Qd4 Rb2 32.Qb6 Rb6+=) 0–1. Siluk,Zygmunt (2025) – Stolarczyk,Anna (2015), Kochan Memorial op Poland, 2008.

3.g3 f5 4.Bg2 Nf6 5.a4 Qb6 6.Bf6 ef6 7.b5 Bc5 8.e3 d4 9.c4 cb5 10.ab5 Be6 11.Qc1 (11.Qh5 Kd8 12.Qf3 Nd7 (12...Bc4? 13.Qb7 de3 14.fe3+–) 13.Qb7 Qb7 (13...de3?? 14.Qa8 Ke7 15.Qh8 ef2 16.Kd1 fg1Q 17.Rg1 Bg1 18.Qg7 Bf7 19.Bd5+–) 14.Bb7 Rb8=) 11...de3 (11...Nd7!?–/+) 12.fe3= Nd7 13.d4 Bd4 (better is 13...Bb4 14.Kf2 Rc8=) 14.ed4+/– Qd4 15.Qc3 (15.Bb7 Rb8 16.Ra6 Qe5 17.Kd1 Kf7+–) 15...Qb6 16.Ra6 (16.Nf3!?+/–) 16...ba6 17.Ba8 Kf7 18.Bd5 (better is 18.Bc6!? ab5 19.cb5= (19.Bb5? a6–+)) 18...Bd5–/+ 19.cd5 Re8 20.Kd1 Qb5 21.Nd2 Ne5 22.Nh3 Nd3 23.Qb3 Rd8 24.d6 Qb3 25.Nb3 Rd6 26.Kc2 g5 (26...Ne5 27.Nf4+=) 27.Rf1 Rd5 (27...Nb4 28.Kb2+=) 28.Ng1 (28.Kc3 f4=) 28...f4+= 29.gf4 (29.Ne2!?+=) 29...Nf4–/+ 30.Nf3 h5 31.Ra1 Rd3 32.Nbd2 g4 33.Ra4 Ne6 34.Ra6 gf3?? 35.Ra7+– Kg6 36.Kd3 Kg5 37.Nf3 Kg4 38.Ng1 f5 39.Ra4 f4 40.Ke2 Nc5 41.Rc4 Ne6 42.Kf2 Ng5 43.h3! Kf5 44.Kg2 Ne4 45.Nf3 Ng3 46.Rc5 Ke4 47.Re5 Kd3 48.h4 Kc3 49.Rd5 Kc2 50.Rd4 1–0. De Visser,Arno – Rietveld, 1992.

3.g3 f6 4.Nf3 =+.

3.h3 Nd7 4.d4 Ngf6 5.Nf3 e6 6.Ne5 Bd6 7.e3 Qc7 8.Nc3 Ne5 9.de5–/+ Be5 10.f4 Bc3 11.Bc3–/+ 0–0 12.Be5? Qb6 13.c3? Qe3–+ 14.Be2 Ne4 15.Qd3 Qf2 16.Kd1 Qg2 17.Kc2 Bd7 18.Rag1 Qf2?? 19.Rg7 Kh8 20.Rg2 f6+– 21.Rf2 fe5? 22.Rf3 ef4 23.Rhf1 e5 24.c4 Ng3 25.Rb1?? e4 26.Qd4 Kg8 27.Ra3 Ne2–/+ 28.Qd2 f3 29.Rh1 Rae8 30.Qg5 Kh8–/+ 31.Ra7 e3 32.Rb7=+ f2?? 33.Rd7+– f1Q 34.Qg7# 1–0. gordiemac – nickbarletta, ChessWorld.net, 2009.

3.h3 Bf5 4.e3 (--> 3.e3 Bf5 4.h3).

3.h4 f6 4.Nf3 e5 5.h5 (5.a3 a5=+) 5...Bd6 (5...Bb4!? 6.a3 Bd6–/+) 6.a3=+ Ne7 7.h6 g6 8.Nc3 Be6 9.d4 e4 10.Nd2 f5 11.b5 (11.e3 0–0–/+) 11...0–0–/+ 12.bc6 bc6 (12...Nbc6 13.e3–/+) 13.Na4 Nd7 14.c4 (14.e3 Rb8–/+) 14...Nf6 (14...e3!? 15.Nf3 dc4 16.Qc2–+) 15.c5 (15.e3!?–/+) 15...Bc7 16.Nc3? (16.e3 f4 17.ef4 Bf4–/+) 16...a5 (16...e3 17.Nf3 Ng4 18.Qd3–+) 17.Qa4? (17.e3 f4 18.ef4 Rb8–/+) 17...Bd7 (better 17...e3!? 18.Nf3 Ne4 19.Ne4 fe4 20.fe3 ef3 21.ef3 Nf5 22.Qc6 Qc8–+) 18.Nd1 Rb8 (18...f4 19.e3–/+) 19.e3=+ Nc8 20.Bc3 Exerts pressure on the isolated pawn 20...Na7 21.Nb3 The pressure on the isolated pawn grows 21...Nb5 22.Nd2 (22.Ba5!? f4 23.Bc7 Qc7 24.Bb5 Rb5 25.ef4=) 22...Bc8 (22...Nc3 23.Nc3 f4 24.ef4 Bf4 25.Be2–/+) 23.Bb2 (23.Nb3 Nc3 24.Nc3 Bd7=+) 23...Ba6 24.Rh3 Re8 25.f3 (25.Qc2 Bc8=+) 25...Kf7 (25...ef3!? 26.Nf3 Ng4–+) 26.fe4–/+ Ne4 27.Ne4 Re4 (27...de4 28.Bc4 Kf8 29.Rb1=) 28.g3 (better 28.Nf2!? Rh4 29.Qc2 Rh3 30.Nh3–/+) 28...Rg4 29.Kf2 (29.Nf2 Rg3 30.Kd2 Qg5 31.Rg3 Qg3–+) 29...Qe7 (29...Bg3 30.Kf3 Qg5–+) 30.Bg2? (better 30.Kg1–+) 30...Qg5 31.Bc1 (31.Kg1–+) 31...Rg3 32.Rh2 Rg4 (better 32...Rf3 33.Ke2 Bh2–+) 33.e4 Rg2! 34.Rg2 Qh4 35.Kg1 Qe4 (35...Qe1) 36.Be3–+ Re8 37.Bf2 (37.Qc2 Nd4 38.Qe4 Re4–+ (worse 38...fe4 39.Bd4 Bf4 40.Rf2+–)) 37...f4 38.Nc3 Qf5 39.Nb5 Bb5 40.Qd1 a4 (better 40...f3 41.Bg3 Bg3 42.Rg3–+) 41.Qb1?? (41.Qg4 Qg4 42.Rg4 Re4–+) 41...Qb1 (better 41...Re4 42.Ra2 f3–+) 42.Rb1 Re2 (better 42...f3 43.Rg4 Re2–+) 43.Rb5? (better 43.Bh4 Re4 44.Re1–+) 43...cb5 44.Bh4 (44.Rg5 b4! 45.Kf1 f3–+) 44...f3 45.Re2 fe2 46.Kf2 Bf4 (46...b4!? 47.Ke2 ba3 48.Be1–+) 47.Ke2 Bg5 (better 47...Bc1–+) 48.Bg5+– Ke6 (48...b4 49.ab4 a3 50.Bd2+–) 49.Ke3 (better 49.Kd3+–) 49...Kd7 (49...b4 50.Kd2 (50.ab4?? a3–+) 50...ba3 51.Kc2+–) 50.Kf4 (50.Kd3 b4 51.ab4 Kc6+–) 50...Kc6? (50...b4 51.Ke5 ba3+–) 51.Bf6 (51.Ke5!? b4 52.Bc1 b3+–) 51...Kd7 (better 51...b4 52.ab4 a3 53.b5 Kb5–+) 52.Ke5 (better 52.Bh4 b4 53.ab4+–) 52...Ke8?? (52...b4 53.Bg5 ba3+–) 53.Bg7 (53.Ke6 Kf8 54.c6 b4 55.c7 Ke8 56.c8Q) 53…Kf7 (53...Kf7 54.c6 b4 55.c7 Ke7 56.c8Q g5 57.Qe6 Kd8 58.Kd6 g4 59.Bf6). beatmeeasy (1925) – WarkopGool (1900), lichess.org, 2020.

3.a3 Qc7

4.e3 e5 5.c4 Nf6 6.d4 Bd6 (better is 6...e4!?=) 7.c5+/– Be7 8.de5 Ng4 9.Nf3 0–0 10.h3 Nh6 11.Bd3 b6 12.cb6 ab6 13.Qc2 g6 14.Nc3 Nd7?? (better is 14...Be6+–) 15.Nd5! Qd8 (15...cd5 16.Qc7) 16.Qc6 (< 16.Ne7 Qe7 17.Qc6 Ba6+–) 16...Ba6 (16...Rb8 17.Qc3 (< 17.Ne7 Qe7 18.Qc3 Rd8+–) 17...Kg7 18.Bb5+–) 17.Ba6 Ra6 18.Qb7 Ra8 (18...Bb4 19.ab4 Ra1 20.Ba1+–) 19.Rd1 Nf5 20.Ne7 Qe7 21.Rd7 Qe6 22.Qd5 (22...Qd5 23.Rd5+–) 1–0. guest488 – guest916, ICC, 2003.

4.Nf3 Nd7 5.c4 e5 (5...dc4 6.e3=) 6.cd5 cd5 7.Nc3 Ngf6 8.Rc1 Qb6 9.e3 a6 10.Na4 Qd8 (10...Qd6 11.Ne5 Ne5 12.Be5 Qe5 13.Nb6+=) 11.Ne5 Bd6 (11...a5 12.Bb5 ab4 13.ab4+–) 12.Nf3 (12.Nd7!? Bd7 13.Nc5 Bc5 14.bc5 0–0+–) 12...0–0+– 13.Bd3 Re8 14.Qc2 g6 (14...a5 15.b5+–) 15.h4 (15.Be2 Ra7+–) 15...Ne5 (15...Ra7!?+–) 16.Ne5+– Be5 17.h5 (better 17.Be5!? Re5 18.Qc7 Qc7 19.Rc7+–) 17...Bb2+= 18.hg6?? (better 18.Qb2 Nh5 19.Qd4+=) 18...hg6?? (better 18...Bc1 19.gh7 Kh8 20.Qc1 d4–+) 19.Bg6?? (better 19.Qb2 d4 20.Be2+–) 19...Kg7 (better 19...Bc1 20.Bh7 Kg7–+ (20...Nh7 21.Qh7 Kf8 22.Qh6 Ke7 23.Qg5 f6 24.Rh7 Kd6 25.Qf4 Kc6 26.Qd4–+)) 20.Rh7 (20.Rh7 Nh7 21.Qb2 Kg6 22.Qd4–+). FeegLood (2165) – Arka50 (2110), lichess.org, 2015.

4.Nf3 Bf5 5.Be5 Qc8 6.Nh4 Bd7 7.e3 Nf6 8.h3 g6 9.Bf6 (9.d4 a5 10.Nd2 Bg7+=) 9...ef6= 10.d4 Bg7 (10...a5 11.ba5 Qc7 12.Bd3=) 11.c4 0–0 12.c5 a5 13.Nd2 ab4 14.ab4 Na6 (14...Ra1!? 15.Qa1 f5=) 15.Ba6+= Ra6 16.Ra6 ba6 17.Qa4 g5 (17...Re8 18.0–0+=) 18.Nhf3 Bf5 19.Nb3 (19.0–0 Bd3 20.Ra1 Qe6+=) 19...Bd3+= 20.Na5 Bb5 21.Qc2 Re8 22.g4 h6 23.Nd2 (23.Qf5 Qf5 24.gf5 Re7=) 23...f5=+ 24.gf5 (worse 24.Qf5 Qf5 25.gf5 Bd4–/+) 24...Bd4 25.Kd1 Bf6 26.Nab3 Qc7 (26...Ba4 27.h4 Qb7 28.hg5 hg5–+ (28...Bg5?! 29.Qc3=+)) 27.Nf1? (better 27.Nf3!?–/+) 27...Re4–+ 28.Nd4? (28.Nfd2 Rb4 29.h4 Ba4 30.hg5 Rb3 31.Nb3 Qb7–+) 28...Bd4 (better 28...Bf1 29.Rf1 Bd4 30.Qd2–+) 29.Nd2 Bf6 (29...Re8 30.ed4 Qf4 31.Qc3–+) 30.Ne4 de4 31.Qe4 Qd7 32.Kc1 Ba4 33.f4 (33.Qc4 Qf5 34.f4 gf4 35.Rf1–+) 33...Bc3 34.Qg2 Bb4 (34...Qd3 35.fg5 Be5 36.gh6 Kh7 37.Qg6 fg6 38.fg6 Kh6 39.b5 Qc2) 35.fg5 Ba3 36.Kb1 Qd3 (36...Qf5!? 37.e4 Qg6 38.Qf3–+) 37.Ka1 Qc3 (37...Bc5 38.gh6 Kf8 39.Qb2 Qa3 40.Qa3 Ba3 41.Rg1+–) 38.Kb1 hg5?? (better 38...h5 39.g6 Qb4 (worse 39...Qc5 40.gf7 Kf7 41.Qg6 Kf8 42.Qf6 Ke8 43.Qe6 Kd8 44.Ka2–+) 40.Ka1 f6–+ (40...Qc5?! 41.gf7 Kf7 42.Qg6 Kf8 43.Qf6 Ke8 44.Rg1–/+)) 39.Qg5= Qg7 40.Qd8 Kh7 The mate threat is Qb2 41.Qh4 Kg8 42.Qd8 Kh7 43.Qh4 Kg8 44.Qd8 Kh7 ½–½. petrobbo (1975) – The dreamer (2255), ChessWorld.net, 2012.

3.a3 e5

4.e3 d4 5.Nf3 (5.ed4!? ed4 6.Nf3+=) 5...de3= 6.de3 Qd1 7.Kd1 Bg4 (better 7...f6!?=) 8.Be5+– Nd7 9.Bb2 Ngf6 10.Be2 Ne4 11.Ke1 Bd6 (11...a5 12.h3 Be6 13.ba5 Ra5 14.Nd4+–) 12.h3 (12.Bg7 Rg8 13.Bb2 a5 14.ba5 Bh5+–) 12...Bf3+– 13.Bf3 Nef6 14.Nd2 0–0 (14...Be5 15.Rb1+–) 15.Rd1 (15.Nc4 Bc7+–) 15...Ne5 (better 15...Be5 16.Rb1 Bb2 17.Rb2 Ne5+–) 16.Nc4?? (16.Be2 Rad8+–) 16...Nf3?? (better 16...Nc4 17.Bf6 gf6–/+) 17.gf3+– Bc7 (17...Be7 18.Na5+–) 18.Bf6 gf6 19.Rg1 Kh8 20.Rd7 Be5? (20...Rac8 21.Nd2+–) 21.Ne5 (better 21.f4 Bc3 22.Ke2+–) 21...Rg8?? (21...fe5 22.Rg5 a5 23.Re5 ab4 24.ab4 b5+–) 22.Rb7 (22.Nf7) 22...Rg1–+ 23.Ke2 fe5 24.Rf7 Rd8 25.Rf5?? (better 25.f4 ef4 26.Rf4–/+) 25...Rdd1 26.f4 e4 27.f3 Rge1 (27...Rde1 28.Kd2 ef3 29.Rf8 Kg7 30.Ra8–+) 28.Kf2 Rf1 29.Kg3 Rfe1 (better 29...Rg1 30.Kh4 ef3 31.Rf8 Kg7–+) 30.Kh4?? (better 30.Kf2!?=) 30...Rg1 (better 30...ef3 31.Kg3 Re3 32.Rf8 Kg7–+) 31.fe4–/+ Rd6 32.Re5 (32.Kh5 Rg3 33.e5 Rdg6–+ (33...Rh3?! 34.Kg4 Rdh6 35.Rf8 Kg7 36.Ra8=)) 32...Rh6 33.Rh5 Rh5 34.Kh5 Rg3 35.e5 Rh3 36.Kg4 (36.Kg5–+) 36...Kg7?? (36...Re3 37.a4–+) 37.Kf5 (better 37.Kh3 Kf7 38.a4+–) 37...h6 (37...Re3 38.a4–+) 38.e6?? (better 38.Ke4–+) 38...h5 (better 38...Re3 39.a4–+) 39.e4 Re3 40.e5?! (40.a4–+) 40...Re4 (better 40...h4 41.b5 cb5–+) 41.e7 Re5 42.fe5 (better 42.Ke5 Kf7 43.Kd6+–) 42...h4 (42...Kf7 43.a4 Ke7+–) 43.e8Q h3 44.e6 (44.Qd7 Kf8 45.Kf6 h2 46.Qd8) 44...h2 (44...a5 45.e7 ab4 46.Qg6 Kh8 47.e8Q) 45.Qf7 Kh6 (45...Kh8 46.Kg6 h1Q 47.Qe8) 46.Qg6 1–0. FeegLood (2750) – Elandivo (1855), lichess.org, 2016.

4.Be5 Nf6 5.e3 Nbd7 6.Bb2 Bd6 7.Nf3 Qe7 8.c4 0–0 9.Be2 b6 (9...dc4 10.Bc4 a5 11.b5+=) 10.Nc3 Bb7 11.0–0 Rad8 (11...dc4 12.Bc4 b5 13.Bd3+=) 12.Rc1 (12.cd5 cd5 13.Nb5 Bb8+–) 12...Rfe8 (12...dc4!? 13.Bc4 c5+=) 13.cd5+– cd5 14.Nb5 Bb8 15.Nbd4 (15.Qa4 a6 16.Nc7 b5+–) 15...Ne5 16.Ne5 Qe5 17.f4 Qe7 18.Nf5 Qe6 19.Bg4 Ng4 20.Qg4 g6 (20...Qg6 21.Qh3 d4 22.Nd4+–) 21.Nh6 White prepares the advance f5 21...Kf8 22.f5 Qe4 (22...Qd6 23.g3 Re7 24.fg6 Qg6 25.Qg6 hg6+–) 23.fg6 (23.fg6 Qe3 24.de3 Bh2 25.Kh2 Re5 26.g7 Ke8 27.g8Q Ke7 28.Qf7 Kd6 29.Qc7) 1–0. FeegLood (2065) – Whitemouse (1975), lichess.org, 2015.

3.a3 e6

4.e3 f5 5.c4 Nf6 6.Nf3 Bd6 7.d4 a6 8.c5 Bc7 9.Be2 Nbd7 10.Nbd2 0–0 11.0–0 Ne4 12.Ne1 e5 13.f3 Nd2 14.Qd2 ed4 15.Bd4 Re8 16.Nd3 Qe7 17.Nf4?? Be5?? 18.Be5 Qe5 19.e4 fe4 20.fe4 Qe4 21.Bd3 Qd4 22.Kh1=+ Nf6?? 23.Bh7!+– Nh7 24.Qd4 Re4 25.Qd3 Bf5 26.Qg3 Rae8 27.Rae1 Nf6 28.Re4 Ne4 29.Qh4 g5 30.Qh5 gf4 31.Qe8 Kg7 32.Qe5 Kg6 33.Rf4 (33...Bc8 34.Rf8 Nf2 35.Kg1 Ne4 36.Rg8 Kf7 37.Rg7 Kf8 38.Qe7#) 1–0. revbodio – fierce, Live Game Caissa's Web, 2005.

4.e3 f5 5.Nf3 Nf6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 c6).

3.a3 f6

4.e3 Be6 5.Nh3 Bf7 6.f4 e6 7.Be2 g6 (7...Bg6 8.0–0=) 8.0–0+= Bg7 9.Ng5 Ne7 10.Bg4 0–0? (better 10...Qd7+=) 11.Ne6+– f5?? (better 11...Be6 12.Be6 Kh8+–) 12.Nd8 fg4 (12...Bb2 13.Ra2 Rd8 14.Rb2 fg4 15.Qg4 Nf5+–) 13.Nf7 (13.Bg7 Rd8 14.Bf6 Re8 15.Be7 Re7 16.Qg4 Nd7+–) 13...Rf7 (13...Bb2 14.Ra2 Rf7 15.Rb2+–) 14.Bg7 Nf5 (14...Kg7 15.Qg4 Nd7 16.Nc3+–) 15.Qg4 (better 15.Bb2 g3+–) 15...Kg7 16.Nc3 Nd6 (16...Nd7 17.Qf3+–) 17.Ne2 (17.d3 Nd7+–) 17...Nd7 18.Nd4 Nf6 (18...Re8 19.Rad1+–) 19.Qe6 (19.Qh3 Nfe4 20.d3 Nc3+–) 19...Rd8 (19...Nc4 20.Rfd1+–) 20.f5 Nf5 (20...Nde4 21.fg6 hg6 22.d3+–) 21.Rf5 (21.Nf5!? gf5 22.Rf5 Rdf8+–) 21...gf5 22.Qf5 (better 22.Nf5 Kg6 23.Nd6 Rd6 24.Qd6 h6+–) 22...Rdf8 (22...Rg8+–) 23.Ne6 Kh8 24.Nf8 Rf8 25.Rf1 Nd7 26.Qd7 Rf1 27.Kf1 Kg8 28.Kf2 b6 29.Kf3 (29.Qc6 Kg7+–) 29...c5 30.Kf4 cb4 (30...a6 31.Ke5 Kf8 32.Kf6 cb4 33.Qf7) 31.Kf5 ba3 32.Kf6 a2 33.Qe8 1–0. FeegLood – grasshopper, lichess.org, 2015.

4.e3 Bf5 5.Nh3 Bh3 (5...e5!?=) 6.Qh5+= (worse 6.gh3 e5=+) 6...g6 7.Qh3 e5 8.Bd3 f5? (better 8...Ne7!?+=) 9.Be5 Qe7?? (better 9...Nf6+–) 10.Bh8+– Bg7 (10...Nf6 11.0–0+–) 11.Qh7 Ba1 (11...Kf8 12.Bg7 Qg7 13.Qg7 Kg7 14.Be2+–) 12.Qg8 Qf8 (12...Kd7 13.Ba1 Qe8 14.Qg7 Kc8 15.g4+–) 13.Qf8 (better 13.Qg6 Qf7 14.Qf7 Kf7 15.Ba1 a5 16.ba5 Ke6+–) 13...Kf8 14.Ba1 Nd7 15.h4 Ne5 (15...Kf7 16.h5 gh5 17.Bf5+–) 16.h5 (better 16.Be5 Ke7+–) 16...Nd3 17.cd3 gh5 18.Rh5 Kf7 (18...Ke7 19.Rf5 a5 20.ba5 Ra5 21.Bc3+–) 19.Rf5 Ke6 (19...Ke7 20.Rg5 Rf8 21.Bd4+–) 20.Rf6 Kd7 21.Rh6 (21.Rf7!? Ke6 22.Rb7 a5+–) 21...Rg8 22.Nc3 (better 22.Rh7!? Kc8+–) 22...Rg2 23.Ne2 Rg8 (23...b6 24.Rh7 Ke8 25.Kf1+–) 24.Rh7 Kd6 25.Rh8 (better 25.Rb7 a5 26.f4 Re8+–) 25...Rg2 (25...Rh8 26.Bh8 b6+–) 26.Nf4 (better 26.Rh7 b6 27.f4+–) 26...Rg1 27.Ke2 Ra1 28.Rh6 Kc7 (28...Kd7 29.Rh7 Kc8 30.e4 de4 31.de4 Ra3 32.Ne6+–) 29.Rh7 (29.Ne6 Kd7+–) 29...Kb6 (29...Kc8 30.Ne6 Ra3 31.f4+–) 30.Ne6 Ra3 (30...a5 31.ba5 Ka5 32.Rb7 Ra3+–) 31.Nc5 Ra1 (31...Rd3 32.Rb7) 32.Rb7 1–0. FeegLood (2400) – Mina_tofa, lichess.org, 2015.

4.e4 e5 (--> 1.b4 e5 2.Bb2 f6 3.e4 c6 4.a3 d5).

3.a3 Bg4

4.d3 Nd7 5.g3 (5.h3!? Bh5 6.g4= Bg6 7.Nf3 Ngf6 8.Nbd2 e6 9.c4; 5.Nd2 Ngf6 6.h3 Bh5 7.Ngf3 e6 8.c4 Be7 9.cd5) 5...e5+= (5...Ngf6 6.h3 Bh5 7.g4 Bg6 8.Nf3 e6 9.Nbd2) 6.Bg2 (6.h3 Be6 7.Nf3 Bd6 8.Bg2 Ngf6 9.Nc3) 6...Ngf6 (6...a5 7.h3 Be6 8.c3–/+ (8.b5 Qb6 9.Nf3) 8...ab4 9.cb4) 7.Nd2 (7.Nf3 Qc7+= (7...a5 8.Nbd2 ab4 9.ab4) 8.Nc3 a5 9.0–0; 7.h3 Be6 8.Nf3 Bd6 9.Nc3) 7...a5–/+ (7...Bd6 8.Ngf3 0–0 9.c4) 8.c3 (8.h3 Be6 9.Ngf3) 8...Bd6 9.Ngf3 0–0 10.e4 de4 11.de4 b5 12.0–0 Qe7 (12...Nb6 13.h3 Be6 14.Qc2–/+) 13.Qe2 (13.h3 Be6+=) 13...Rfb8 (13...Nb6 14.h3 Be6 15.Qe3–/+) 14.h3 Be6 15.Ng5 c5 16.Ne6 Qe6 (worse is 16...fe6 17.ba5 Ra5 18.c4+=) 17.f4 (17.bc5!? Nc5 18.Rab1+=) 17...ab4–/+ 18.cb4 (18.f5 Qe7 19.ab4 Ra1 20.Ra1 cb4 21.cb4 Bb4–/+) 18...cb4 19.ab4 Ra1 20.Ba1 Bb4 21.f5? (better is 21.Rb1 Bc5 22.Kh2 ef4 23.gf4–/+) 21...Qa2–+ 22.Rd1 Ra8 23.Qb5 Bd2 24.Be5 Ne5 25.Qe5 Qc2 26.Rf1 Re8 27.Qd4 Qc3 28.Qd6 Be3 29.Kh1 Qe5 30.Qd3 Bb6 31.Re1 Nh5 32.Qf3 Bc7 33.Re3 Ng3 (33...Ng3 34.Qg3 Qg3 35.Rg3 Bg3–+) 0–1. Brethes,F (2155) – Nitelea,B (1940), San Agustin Open, Aviles ESP, 2006. (=1.a3 d5 2.b4 c6 3.Bb2 Bg4)

4.h3 Bh5 5.g4 Bg6 6.f4 e6 7.Nf3= a5 8.e3 ab4 9.Be2 (better 9.ab4!? Ra1 10.Ba1=) 9...ba3–/+ 10.Na3 Nf6 11.g5 Nh5 12.Rg1 Nd7 13.Nd4 (better 13.Ra2 b5 14.c3–/+) 13...c5?? (better 13...Qb6 14.Nab5 Ra1 15.Ba1 Nf4 (15...cb5?! 16.Bh5 b4 17.Be2=+) 16.ef4 cb5–+) 14.Ndb5+– Nf4 15.Nc7 Qc7?? (better 15...Ke7 16.Na8 Ne2 17.Qe2 Qa8=) 16.Nb5+– Ra1 17.Nc7 Kd8 18.Qa1 (18.Ba1?! Ne2 19.Ne6 fe6 20.Qe2 Bc2+–) 18...Ne2 19.Ke2 Kc7 20.Qa5 (better 20.Bg7 Bg7 21.Qg7+–) 20...Kc6 21.d3 Bd6? (21...h6 22.gh6 Rh6 23.Qa8 Rh3 24.Be5 Ne5 25.Qc8 Kd6 26.Qf8 Kd7 27.Qc5 (worse 27.Qg7 Bh5 28.Kf2 Rf3 29.Kg2 Re3=) 27...Bh5 28.Kf2 Ng4 29.Kg2 Rh2 30.Kg3+–) 22.c4 (better 22.Rb1!?+–) 22...dc4+– 23.dc4 Bc7?? (better 23...e5+–) 24.Qb5 Kd6 25.Rd1 (25.Rd1 Bd3 26.Rd3 Ke7 27.Qd7 Kf8 28.Qc8 Ke7 29.Rd7) 1–0. TwelveTeen (2490) – universe64 (2360), lichess.org, 2017.

4.h3 Bh5 5.g4 Bg6 6.Bg2 Nd7 7.Nf3 h6 8.0–0 Qc7 9.d3 e5 10.e3 Ngf6 11.Nbd2 Bd6 12.c4? (12.Qe2 0–0–0+=) 12...0–0 (12...Bd3 13.c5 Be7 14.Re1–+) 13.Rc1? (13.Qc2 Rad8+=) 13...e4?? (better is 13...Bd3 14.Re1 e4–+) 14.de4 Ne4 (better is 14...de4!? 15.c5 Be5 16.Ne5 Ne5+=) 15.cd5+/– Nd2 16.Qd2 Be4? 17.dc6+– bc6 18.Qc3 Ne5?? 19.Ne5+– Bg2 20.Kg2 f6 21.Ng6 Rfc8 22.Rc2 Be5 23.Ne5 Qe5 24.Qe5 fe5 25.Be5 Re8 26.Bg3 Rac8 27.Rfc1 Re6 28.Rc5 a6 29.h4 Kh7 30.Bf4 g6 31.f3 Rf6 32.Kg3 Re6 33.e4 Rf6 34.Be3 Rcf8 35.f4 g5 36.hg5 hg5 37.f5 Rc8 38.Bg5 Rd6 39.Bf4 Rd3 40.Kh4 Kg7 41.Rc6 Rh8 42.Kg5 Rd7 43.Be5 (43.Be5 Kf7 44.Bh8 Re7 45.e5 Rb7 46.e6 Ke8 47.Rc8 Ke7 48.Bf6 Kd6 49.Rd1) 1–0. Fournier,Frederic (1640) – check, Active, 2006.

3.a4 Nd7

4.b5 e5 5.e3 Ngf6 6.c4 Bd6 7.Nf3 0–0 8.Qb3 Nc5 (8...e4 9.Nd4 dc4 10.Qc4–/+) 9.Qc2=+ Re8 (9...e4 10.Nd4 cb5 11.ab5 dc4 12.Bc4=+) 10.d4 ed4 11.Bd4 Ne6 12.Bc3 Ne4 (12...Bc5 13.cd5 cd5 14.Bd2=+) 13.Bb2 (13.Be2!?=+) 13...Bb4–/+ 14.Nbd2 (14.Nfd2 Nf4! 15.Ba3 Ba5–+) 14...Nd2 (14...N6g5 15.Ke2–+) 15.Nd2–/+ dc4 (15...d4!? 16.0–0–0 de3 17.fe3 Bc5–/+) 16.Bc4=+ Nf4 (better 16...cb5 17.ab5 Nf4=+) 17.Rd1?? (better 17.0–0–0 Ne6 18.bc6 bc6 19.Bd3=+) 17...Ng2–+ 18.Kf1 Bh3 19.Kg1 (19.Bf7 Kf7 20.Qc4 Kg6 21.Ke2–+) 19...Bd2 (19...Ne3 20.Bf7 Kf7 21.Nf3–+) 20.Rd2 (20.Bf7 Kf7 21.Rd2 Nh4 22.Qc4 Kg6 23.Qc2 Kh6–+) 20...Qg5 21.f4 Nf4 22.Kf2 Qg2 (22...Qh4 23.Kf3 Bg4 24.Kf4 g5) 23.Ke1 Qh1 (23...Qh1 24.Kf2 Qg2 25.Ke1 Qg1 26.Bf1 Qf1) 0–1. AhmedSultanov (1850) – KogSergey (1820), lichess.org, 2019.

4.e3 (--> 3.e3 Nd7 4.a4).

3.a4 f6

4.e3 a5 5.b5+– e6 6.Qh5 (6.Nh3 f5+–) 6...g6+= 7.Qf3 (7.Qd1 Nd7+=) 7...Bg7= 8.c4 (8.Nc3 Ne7=) 8...h5 (8...Ne7!?=+) 9.Bd3 Bd7?? (better 9...Ne7=) 10.Bg6+– Kf8 11.cd5 Nh6 (11...ed5 12.Bh5 cb5 13.ab5 Bb5+–) 12.dc6 bc6 13.Qh5 (better 13.Nh3+–) 13...Ra7 (13...f5 14.d4 Qf6+–) 14.Qc5 Kg8 15.Qa7 1–0. DEFFM – Castyarcade, freechess.org, 2019.

4.e3 g6 5.b5 Bg7 6.c4 Nh6 7.Nf3 Nf7 8.Be2 (8.d4 Bg4+=) 8...e5 (8...dc4 9.Na3=) 9.0–0 (9.cd5 cd5 10.0–0 0–0+=) 9...Be6 (9...dc4 10.Bc4 Nd6 11.Be2=) 10.Nc3 (10.cd5 cd5 11.d4 0–0+=) 10...0–0 (10...dc4!? 11.d3 cd3 12.Bd3 f5=+) 11.Qb3 e4 (11...Nd7!?=) 12.Nd4+– Qe7? (better 12...dc4!? 13.Qc2 Qc8 14.Ne6 Qe6 15.Ne4 cb5 16.ab5 Rc8 17.Bf6 Nd7 18.Bg7 Kg7+–) 13.Ne6 (better 13.bc6!? bc6 14.Ba3 Nd6 15.Ne6 Qe6 16.cd5 cd5 17.Qd5 Qd5 18.Nd5 Ne8+–) 13...Qe6 14.cd5 cd5 15.f3 (15.Nd5 Kh8+–) 15...ef3? (better 15...f5+–) 16.Bf3+– (16.Rf3?! f5+=) 16...f5 17.Bd5 Qe7 (17...Qd7 18.a5 a6 19.ba6 Na6 20.Qb7+–) 18.Bc4 (better 18.Ba3 Qd7 19.Bf8 Kf8 20.a5+–) 18...Nd7 19.Nd5 Qd6? (19...Qd8 20.Bg7 Kg7 21.Nf4+–) 20.Ba3 (20.d4 Kh8 21.Ba3 Qb8 22.Bf8 Qf8+–) 20...Qb8? (20...Nc5 21.Qa2 Ba1 22.Qa1 Ne5+–) 21.Rac1 (better 21.d4 Kh8 22.Bf8 Qf8+–) 21...Re8 (21...Be5 22.Nf4+–) 22.Ne7 (better 22.Nc7! Nde5 23.Bd5 Rd8 24.Na8 Qa8 25.Bf7 Kh8+–) 22...Re7 23.Be7 Qe8 24.Bb4 Nde5 (24...a5 25.ba6! ba6 26.Bd5+–) 25.Bf7 (25.Bd5 Rd8+–) 25...Nf7 (25...Qf7 26.Qf7 Nf7 27.g4 fg4 28.Rc7+–) 26.Rc7 Rc8 (26...a5 27.Bc5 Bf6 28.Rb7+–) 27.Rfc1 (better 27.Qf7 Qf7 28.Rc8 Bf8 29.Rf8 Qf8 30.Bf8 Kf8+–) 27...Rc7 28.Rc7 b6 (28...a5 29.Ba5 Be5 30.Rb7+–) 29.Ra7 (better 29.Re7 Qe7 30.Be7 Bf8 31.Bf8 Kf8+–) 29...Be5 (29...Bf6 30.Qd5 Kg7 31.Qc6+–) 30.a5 (better 30.Re7 Qf8 31.Qe6 Bh2 32.Kh2+–) 30...ba5 (30...Bh2 31.Kf1 ba5 32.Ba5 Bd6+–) 31.Ba5 (worse 31.Ra5 Bc7+–) 1–0. RichardSommer (2095) – Ausoa22 (2070), lichess.org, 2020.

3.a4 Nf6

4.b5 e6 5.e3 Bd6 6.Nf3 Nbd7 7.d4 0–0 8.Be2 c5 9.c4 b6 10.0–0 Bb7 11.Nbd2 cd4 12.ed4 Ne4 13.Ne4 de4 14.Nd2 Qh4 15.g3 Qh3 16.Bg4 Qh6 17.Ba3 Ba3 18.Ra3 f5 19.Be2 Qh3 20.f3 Nf6 21.fe4 Ne4 22.Ne4 Be4 23.Bf3 Bf3 24.Raf3 Rad8 25.Rd3 Qg4 26.Qg4 fg4 27.Rf8 Kf8 28.Kf2 Kf7 29.Ke3 Kf6 30.c5 Kf5 31.c6 g5 32.c7 Rc8 33.d5?? (better is 33.Rc3+–) 33...Rc7–/+ 34.de6 Ke6 35.Ke4 Rc4 36.Rd4 Rc1 37.Ke3 Rh1 38.Rg4 Kf5 39.Rd4 Rh2 40.Rd7 h5 41.Ra7 h4 42.gh4 Rh4 43.Kf3 Rb4 44.Ra6 g4 45.Kg3 Rb3 46.Kg2 Ra3 47.Rb6 Ra4 48.Rb8 Ra2 49.Kg3 Ra3 50.Kg2 Ra2 51.Kg3 Ra3 52.Kf2 Kf4 53.b6 Ra2 54.Kg1 Kg3 55.Kf1 Ra1 56.Ke2 Kg2?? 57.Rg8+– g3 58.b7 Ra2 59.Ke1 Ra1 60.Ke2 Ra2 61.Kd3 Rb2 62.b8Q Rb8 63.Rb8 Kf1?? 64.Rf8 Kg1?? 65.Ke2+– g2 66.Kf3 Kf1 67.Kg3 Kg1 68.Ra8 Kf1 69.Ra1 (69.Ra1 Ke2 70.Kg2+–) 1–0. popovicigelu – stca, internet, 2012.

4.b5 e6 5.e3 e5 6.c4 e4 7.f3 ef3 (7...Bd6 8.bc6 bc6 9.cd5=+) 8.Nf3= Bd6 (8...Be6 9.cd5 Nd5 10.Be2=) 9.Be2 (9.cd5 cd5 10.Bd4 Bf5=) 9...0–0 10.0–0 Bg4 11.Nc3 dc4 12.Bc4 White gets in control 12...cb5 (12...Nbd7=) 13.ab5 (13.Nb5!? Be7 14.Rc1+=) 13...Qc7 (13...Bh2!? 14.Kh2 Qc7 15.Kg1 Qc4=+) 14.Be2 Bf3 15.Bf3 Bh2 16.Kh1 Bg3 (better 16...Nbd7!?=) 17.Ne4+– Ne4 18.Be4 Qe7? (18...f5 19.Qh5 Nd7 20.Rf5 Nf6 21.Bf6 gf6+–) 19.Qg4+– Threatening mate... how? 19...Qh4 20.Qh4 Bh4 21.Bb7 Nd7 22.Ba8 Ra8 23.Bd4 f6 (23...Bf6 24.Bf6 Nf6 25.b6+–) 24.Ra7 Re8 (24...Ra7 25.Ba7 Bg3+–) 25.Rd7 (25.Rd7 Bg3 26.b6+–) 1–0. RichardSommer (2010) – Sgedgdsdfw (2045), lichess.org, 2020.

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

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

4.e3 g6 5.d4 Bg7 6.c4 0–0 7.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.a4).

3.a4 Bg4

4.b5 e6 5.d3 Bb4 6.Nd2 Qa5?? 7.Bg7+– Bc3 8.Bh8 Bh8 9.Ra2 Ne7 10.f3 Bh5 11.g4 Bg6 12.Nh3 f5 13.Nf4 Bf7 14.c4 Be5 15.Ng2 fg4 16.fg4 dc4 17.dc4 cb5 18.cb5 Bc3 19.Ra3 Bb4 20.Rd3 Nd5 21.Kf2 Bg6 22.Rd4 Bc5= 23.Nf3 Qb6 24.e3+/– Bd4 25.Nd4 Nd7+= 26.Qf3 Ne5 27.Qg3 0–0–0?? 28.Qe5+– Nc3 29.Qe6 Qe6 30.Ne6 Rd2 31.Kg3 Ne4 32.Kf4 Rf2? 33.Ke5+– Kd7 34.Nf8 Ke7?? 35.Ng6 (35...hg6 36.Ke4+–) 1–0. weisstra – 666x, caissa.com, 2007.

4.Nf3 Nd7 5.h3 Bf3 6.ef3 e6 7.Be2 (7.b5 Ngf6+=) 7...Ngf6 (7...Qg5!? 8.g4 Bb4–/+) 8.b5+= c5 9.d4 (9.0–0 Bd6=) 9...c4 10.0–0 Bd6 11.Nd2 (11.a5 0–0+=) 11...0–0 12.c3 (12.a5 Bb4 13.a6 c3–/+) 12...a6 13.Ba3 (13.ba6 Ra6 14.Re1 Qb6–/+) 13...Ba3–+ 14.Ra3 ab5 15.Qa1 (15.Qc2 Nb6–+) 15...Qa5 (15...Nh5 16.Rd1 Qe7 17.a5–+) 16.Rb1 ba4 17.Rb7 Nb6 18.Qb2 Ra6 19.Bd1 Ne8 20.f4 Nd6 21.Rc7 Nb5?? (better is 21...Qb5 22.Qa1 Rb8–+) 22.Rc5+= Na3 23.Ra5 Ra5 24.Qa3 Rb8 25.Nf3 Nc8 26.Ne5 Rb1+– 27.Nd7 Rd1 28.Kh2 h5?? 29.Qf8 Kh7 30.Qf7 Kh8 31.Qh5 Kg8 32.Qe8 Kh7 33.Nf8 Kh8 34.Ne6 Kh7 35.g4 a3 36.Ng5 Kh6 37.Qh5# 1–0. Felicione,Anthony – Echavarria,Johann (2350), Internet Section, 2004.

3.d3 Nf6

4.e3 e6 5.Nf3 Bb4–/+ 6.c3 Be7 7.Be2 0–0 8.0–0 Na6 9.d4 Qc7 10.Nbd2 Ng4 11.h3 Nf6 12.Ne5 Bd6 13.Ndf3 h6 14.a3 b6 15.Bd3 c5 16.Qc2 c4–/+ 17.Be2 Be5 18.Ne5 Nb8 19.f4 Nbd7 20.Bc1 Ne5 21.fe5 Ne4 22.Kh2 f6–+ 23.Kg1 fe5 24.Rf8 Kf8 25.Bf3 ed4 26.ed4 Ng5 27.Bg5= hg5 28.Rf1 Ke7 29.Qg6 Kd6 30.Qg5 Ba6?? 31.Bg4 Qd7? 32.Qe5+– Ke7 33.Qg7 Kd6 34.Rf7 Qb5 35.Qe5 Kc6 36.Qe6# 1–0. Rudolf – LuckyMiki, internet, 2007.

4.h3 e6 5.a3 Bd6 6.c4 Nbd7 7.c5 Bb8 8.e3 0–0 9.f4 e5–/+ 10.fe5 Ne8 11.Nf3= Qe7 12.d4 b6 13.Bd3 bc5+= 14.bc5 a5 15.0–0 f6+/– 16.ef6 Nef6 17.Qe1 Ne4 18.Be4 de4 19.Nfd2 Nf6 20.Nc3 Ba6 21.Rf5= Bd3 22.Qh4+= Qc7 23.Rf4 Qf7 24.Rf5 Qc7 25.g3 Qg3=+ 26.Qg3 Bg3 27.Kg2 Bc7 28.Rg1 Rab8 29.Ba1 Nd5?? 30.Rf8?? Rf8=+ 31.Nce4? Ne3–/+ 32.Kh1 Be4 33.Ne4–/+ Rf3 34.Ng5 Rf2 35.Re1 Rh2 ½–½. PawnPower – caballito, internet, 2006.

3.d4 e6

4.a3 Nf6 5.Nc3 Be7 6.g3 0–0 7.Bg2 Re8 8.Nf3 Nbd7 9.0–0 Bd6 10.Re1 e5 11.e4= de4 12.Ne4+= Nb6? 13.Nf6 Qf6?? 14.de5+– Be5 15.Be5 Qg6 16.Qd4 Bg4 17.Nh4 Qh5 18.Bg7 Re1 19.Re1 a6 20.Bf6 Nd5 21.Bd5 cd5 22.Re5 Qh6 23.Rg5 Kf8 24.Qc5 Ke8 25.Qe7# 1–0. kehrsam – pieeater, ChessWorld.net, 2009.

4.a3 Nf6 5.e3 Be7 6.f3 0–0 7.Bd3 Nbd7 8.Ne2 Re8 9.Nf4 b6 10.0–0 c5 11.Bc3 c4 12.Be2 Bd6 13.b5 e5 14.Nh3 Nf8 15.f4 Bh3 16.gh3?? e4 17.Bb4 Bb4 18.ab4 Ng6 19.Nc3–/+ Qd7 20.Kg2 Nh4 21.Kg3 Nf5 22.Kf2 Nh4 23.Kg3 Nf5 24.Kf2 Qe6 25.Rg1 Nh4 26.Bg4 Ng4 27.hg4 Nf3–/+ 28.Rh1? Qg4–+ 29.Nd5? Qh4 30.Ke2 Rad8 31.Nc7 Re7 32.Na6 Nh2 33.Qg1 Qh5 34.Kf2 Qh4 ½–½. gordiemac – pieeater, ChessWorld.net, 2009.

4.c3 Nf6 5.e3 Bd6 6.Bd3 0–0 7.Nf3 Nbd7 8.0–0 e5 9.de5 Ne5 10.Ne5 Be5 11.Nd2 Re8 12.h3 Bc7 13.Qc2 Qd6 14.Nf3 Ne4 15.h4 Bg4 16.g3?? (Better is 16.Rfb1–/+) 16...Bf3–+ 17.Be4 (17.Rfb1–+) 17...Re4 18.a4 (18.Qe4 de4 19.Rad1 Bd1 20.Bc1–+) 18...Rh4! 19.c4 (19.gh4 Qh2) 19...Rh1 0–1. Borup,John – Reuter,Alfred (1615), KO–002 VCC, 2000.

4.e3 f5 5.Nf3 Bb4=+ 6.c3 Bd6 7.Be2 Nf6 8.0–0 0–0 9.Nbd2 Nbd7 10.h3 e5 11.de5 Ne5 12.Ne5 Be5 13.Nf3 Bc7 14.a4 Ne4 15.Bd3 f4 16.ef4 Rf4 17.Re1 Bb6 18.Be4=+ de4 19.Qd8 Bd8 20.Nd4 Bb6 21.g3 Rf7–/+ 22.Re4 Bh3 23.Rae1 Raf8 24.Kh2 Rf2–+ 25.Kh3 Rb2 26.Ne6 Rff2 27.Rf4 Rf4 28.Nf4 Rc2 29.Re7 Rc3 30.Rb7 Rc4 31.a5 Be3 32.Nd3 Rc3–+ 33.Ne5 g6 34.Rc7? Bf4–+ 35.Rc8 Kg7 36.Nc6 Rg3 37.Kh4 Kh6 38.Rg8 g5 (39.Rg5 Rg5 (39...Bg5?! 40.Kg3 a6 41.Nb4–/+) 40.Na7 Rc5–+) 0–1. Rickytan (1630) – Gaudissimo (1695), internet, 2007.

3.d4 g6

4.e3= Bg7 5.Nc3 Nf6 6.Nf3 0–0 7.Bd3 Qd6 8.0–0 Nbd7 9.Ba3 b5 10.e4 a5?? 11.Qb1?? Re8?? 12.e5+– Qb8 13.ef6 Bf6 14.Re1 Qa7 15.Qc1 ab4+/– 16.Bb4 Bb7? 17.Qe3 e5 18.Bc5?? Nc5–/+ 19.dc5 e4–+ 20.Be4 de4?? 21.Ne4= Ba1 22.Ra1 Kf8?? 23.Qf4 Re6?? 24.Neg5 Re7?? 25.Nh7 Kg7 26.Qf6 Kh7 27.Qe7 Kg7 28.Ng5 Kh6?? 29.Nf7 Kh5 30.Qg5# 1–0. gordiemac – philstar99, ChessWorld.net, 2009.

4.e3 Bg7 5.Nf3 Nf6 6.c4 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5).

4.Nf3 Bg7 5.e3 Nf6 6.Bd3 Bg4 7.Nbd2 0–0 8.0–0 Qc7 9.c3 b5 10.Ne5?? Bd1–+ 11.Rad1 Nh5 12.f4 Nd7 13.g4 Nhf6 14.f5 g5 15.Ndf3 h6 16.Kg2 Nh7 17.Rh1 Ne5 18.Ne5 Be5 19.de5 Qe5 20.h4 Qe3 21.hg5 Qg5 22.Kf3 Nf6 23.Rdg1 Qd2 24.Rh6 Qd3 25.Kf4 Qd2 26.Kg3 Qb2 27.Rgh1 Qc3 28.Kf4 Qd2 29.Kf3 Qd3 30.Kf4 Qe4 31.Kg3 Qg4 32.Kf2 Ne4 33.Ke3 d4! 34.Kd4 Rfd8 35.Ke5 Rd5# 0–1. piotrek3054 – Rudolf, internet, 2007.

3.e3 b6

4.a3 Nf6=.

4.a4 Nd7 5.Nf3 f6 (5...Ngf6 6.b5 c5 7.Be2=) 6.c4 (6.b5 c5+=) 6...e5= 7.d4 (7.b5!? Bb7 8.d4=) 7...Bb4=+ 8.Nc3 (8...Ne7 9.Qb3–/+; 8.Bc3 Bc3 9.Nc3 dc4 10.Bc4 Nh6=). chessleon – threelegs (2000), net–chess.com, 2006.

4.a4 Nf6 5.Nf3=.

4.Nf3 Nd7 5.Be2 (5.b5 Bb7+–) 5...Qc7 (5...Ngf6 6.0–0+=) 6.b5+– Bb7 7.0–0 e6 8.Nd4 (8.bc6 Bc6 9.Na3 Ngf6+–) 8...Ne7 (better 8...c5!? 9.Nf3 Ngf6=) 9.Bh5+– Ng6 10.bc6 Bc6 11.c4 Bb7 (better 11...dc4!? 12.Nc6 Qc6+–) 12.cd5+– Bd5 13.Nc3 a6 (better 13...Bb7 14.Rc1 Nc5+–) 14.Nd5 ed5 15.Rc1 Qb7 16.Nf5 f6 (16...Nf6 17.Be2+–) 17.Re1 (17.d4 b5 18.e4 de4+–) 17...Nc5 18.d4 Ne4 19.f3 Ng5 (19...Nd6 20.e4! de4 21.fe4+–) 20.e4! de4 (20...Kd8 21.ed5 Bb4 22.Re3 Qd5 23.Qc2+– (23.Ng7?! Rg8 24.Qe2 Qb5 25.Bg6 Qe2 26.Re2 hg6+–)) 21.h4 Nf7 22.Qb3 (worse 22.Re4 Kd8 23.Qb3 Nd6+–) 22...Nf4 (22...Kd8 23.fe4 Rb8+–) 23.Re4 Be7 24.Nd6 (24.Nd6 Kd7 25.Re7 Ke7 26.Qf7 Kd6 27.Ba3) 1–0. Pierre – Crimea, internet, 2019.

3.e3 Bg4

4.c4 Bd1–+ 5.Kd1 dc4 6.Bc4 Nf6 7.a3 g6 (7...b5 8.Bf1–+) 8.Nf3 Bg7 9.Ke2 0–0 10.d4 Nbd7 11.Rd1 Nb6 12.Bd3 Nbd5 13.Nbd2 Re8 14.Nc4 b5 (14...Ng4!? 15.h3 Ngf6 16.Kf1–+) 15.Na5 Qb6 16.Rac1 Rac8 17.Rc2 Ng4 18.h3 (18.Rdc1 e5 19.Rc6 Rc6 20.Rc6 Qb8 21.de5 Be5 22.Be5 Re5–+) 18...Nh6 (18...e5!? 19.hg4 e4 20.Be4 Re4 21.Rdc1–+) 19.Rdc1 e5 (better 19...e6!? 20.Nc6 Rc7 21.Rc5–+) 20.Rc6 White gets the initiative 20...Qd8 (better 20...Rc6 21.Rc6 Qd8 22.de5 Qb8–+) 21.Rc8+– Qc8 22.Rc8 Rc8 23.de5 Nf5 24.g3 Nfe7 25.Kd2 Rd8 26.Bd4 Nc7 (26...a6+–) 27.Nb3 (27.Ba7 Rd7+–) 27...Ne6? (better 27...Nc6+–) 28.Bb5+– Nd4 29.ed4 (29.Nfd4?! Be5 30.Kd3 Nf5+–) 29...Nf5 (29...Nd5 30.Na5+–) 30.Kd3 h5 31.Nc5 Ne7 32.g4 Nd5 33.Bc4 Nf4 34.Ke4 (better 34.Ke3 Nd5 35.Bd5 Rd5 36.Ke4+–) 34...Nh3 35.gh5 Nf2 36.Ke3 (36.Kf4 gh5 37.Kg5 Kf8+–) 36...Ng4+– 37.Kf4 gh5 38.Ng5?? (better 38.Kg5 Ne3 39.Bb3+–) 38...Bh6 (better 38...Rd4 39.Nge4 Be5 40.Kg5 Rc4–+) 39.Bf7+– Kg7 (39...Kh8 40.Nce6 Rd5+–) 40.Nce6 Kh8 41.Nd8 Bg5 (41...Nf2 42.Kf5 h4+–) 42.Kg5 Ne3 43.Bh5 Nd5 44.e6 Ne7 45.Kf6 Ng8 46.Kf7 Nh6 47.Kg6 Nf5 48.Nc6 (48.Kf5 Kg8 49.e7 Kh7 50.e8Q Kg7 51.Qg6 Kf8 52.Qf7) 48...Ne7 (48...Nd6 49.e7 a6 50.Ne5 Kg8 51.Be2 a5 52.Bc4 Kh8 53.Nf7 Kg8 54.Nd6 Kh8 55.e8Q) 49.Ne7 a5 50.Kh6 (50.Nf5 ab4 51.e7 ba3 52.e8Q) 50...a4 51.Kg5 (51.Nf5 Kg8 52.e7 Kh8 53.e8Q) 51...Kg7 52.Bf7 (52.Nf5 Kg8 53.e7 Kh8 54.e8Q Kh7 55.Bg6) 52...Kf8 53.Nd5 (53.Ng6 Kg7 54.b5 Kh7 55.e7 Kg7 56.e8Q Kh7 57.Qg8) 53...Kg7 54.Nb6 (54.Bg6 Kh8 55.e7 Kg7 56.Nf6 Kh8 57.e8Q Kg7 58.Qg8) 54...Kf8 55.Nc8 (55.b5 Ke7 56.Nd5 Kd8 57.e7 Kc8 58.e8Q Kb7 59.Qc6 Kb8 60.Qc7 Ka8 61.Nb6) 55...Kg7 56.d5 Kf8 57.d6 Kg7 58.d7 Kf8 (58...Kh7 59.d8Q Kg7 60.Qg8) 59.d8Q Kg7 60.Qg8 1–0. BeepBeepImAJeep (2580) – fb_271076 (2130), lichess.org, 2016.

4.Qg4 Nf6 5.Qd1 e6 6.a3 Bd6 7.c4 0–0 8.Nf3 Nbd7 9.Be2 (9.c5 Bc7+–) 9...Qe8 (9...dc4 10.Bc4 Nb6 11.Bd3+–) 10.d4 Qe7 (10...dc4 11.Bc4 Nb6 12.Bd3+–) 11.0–0 Rac8 (11...dc4 12.Bc4 a5 13.b5+–) 12.Nbd2 Ne4 13.Ne4 de4 14.Nd2 Qh4 (14...Qg5 15.Ne4 Bh2 16.Kh2 Qh4 17.Kg1 Qe4 18.Bd3+–) 15.c5 (better 15.g3 Qh6 16.Ne4+–) 15…Qh2 0–1. BeepBeepImAJeep (2795) – wockyou (2445), lichess.org, 2019.

3.e3 g6??

4.Bh8 Nf6 5.g3 Bf5 6.Bd3 Bg4 7.f3 Be6 8.a4 Qc7 9.Ne2 Nbd7 10.Nd4 Bh3 11.Nc3 Ne5 12.g4 (12.Be2 0–0–0+–) 12...Nc4 (12...Bg2 13.Rg1 Nd3 14.cd3 Qh2 15.Rg2 Qg2 16.Qc1+–) 13.g5 (13.Bc4 dc4 14.Qe2 h5+–) 13...Nd7 14.f4 0–0–0 15.Bc4 dc4 16.b5 c5 17.Nd5 (Better is 17.Nf3+–) 17...Qd6 18.Qf3 Be6?? (18...cd4 19.Bd4 (19.Qh3?! Qd5 20.0–0 de3 21.Qe3 e6+–) 19...e6 20.Nc3+–) 19.e4 cd4 20.Bd4 b6 21.a5 Nc5 22.ab6 ab6 23.Ra8 Kd7 24.Rd8 Kd8 25.0–0 Bd5 26.ed5 e6 27.Qa3 Qd5 28.Bf6 Be7 29.Qa7 Nd7 30.Ra1 Bf6+= 31.gf6 Qd4 32.Kg2 Qf6 33.Qa8 Ke7 34.Ra7 Qd4 35.Qf3 Qd2 36.Kg3 Qc2 37.Qa3 Kd8 38.Ra8 Kc7 39.Qa7 Kd6–/+ 40.Qa3 Nc5 41.Rd8 Ke7 42.Rb8 Qd3 43.Qd3 cd3 44.Ra8?? d2 45.Ra1 Ne4 46.Kf3 Nc3 47.Ke3 d1Q 48.Rd1 Nd1 49.Kd2 Nf2 50.h4 Ne4 51.Kd3 Nc5 52.Kd4 Kd6 53.Ke3 f5 54.Kf3 h5 55.Ke3 Kd5 56.Kd2 Kc4 57.Kc2 Kb5 58.Kc3 Ne4 59.Kd4 Kc6 60.Kc4 b5 61.Kb4 Nf2 62.Kb3 Kc5 63.Kb2 Nd3 64.Kb1 Nf4 65.Kc2 Ng2 66.Kd2 Nh4 67.Ke3 e5 68.Kf2 b4 69.Kg3 g5 70.Kf2 Kc4 71.Kg3 f4 72.Kf2 Kc3 73.Ke2 b3 74.Kf2 b2 75.Ke1 b1Q 76.Kf2 Qc2 77.Kf1 Kd3 78.Kg1 Qg2 0–1. willi_weizenkeim – janaj, HCL–B1814 playchess.de, 2003.

3.e3 Nh6

4.c4 f6 5.Nc3 e5 6.a3 Be7 7.cd5+= cd5 8.Bb5 Nc6= 9.Qh5 Nf7 10.Nf3 g6 11.Qh4 Nd6 12.0–0? Nf5–+ Black prepares d4 13.Qh3 Ne3! 14.Qh6 Nf5 15.Qh3 d4 16.Ne4 Ne3! 17.Qh6 Nf5?? 18.Qh3–/+ Ne3 19.Qh6 Bf8 20.Qh4 Nf1 21.Rf1? Be7–+ 22.Rc1 0–0 23.Bc6 bc6 24.Rc6 Bb7 25.Re6 Bd5 26.Re7 Qe7 27.d3 Rac8 28.h3 Rc2 29.Bd4 ed4 30.Nd4 (30.Qf4 Be4 31.de4 Re2 32.Nd4 Re1 33.Kh2 Re4–+) 0–1. Comet B50 – Crafty 19.01, 2005.

4.c4 f6 5.d4 e5 6.a3 ed4 7.Bd4 Be6 8.cd5 Bd5 9.Nf3 a5 10.b5 a4 11.Nbd2 Nd7 12.bc6 bc6 13.e4 Be6 14.Bc4 Bc4 15.Nc4 Nf7 16.0–0 Nc5 17.Rb1 ½–½. Feldman,Yevgeny – Bonin,Jay, Manhattan CC, 1999.

4.Bd4 Qd6 5.Nf3 Qb4 6.a3 Qd6 7.Bd3 Bf5 8.Bf5 Nf5 9.Bb2 Nd7 10.0–0 0–0–0 11.Ng5 Qf6?? 12.Nf3 Qb2–+ 13.Nc3 e5 14.Ng5 Nh6 15.Na4 Qb5 16.c3 f6 17.Nf3 e4 18.Nd4 Qa6 19.Ne6 Re8 20.Nf8 Rhf8 21.Rb1 b5 22.Nb2 Qa3 23.Qc2 f5 24.Ra1 Qc5 25.Qd1 f4 26.ef4 Rf4 27.d4 Qc3 (28.Qe2 Qd4–+) 0–1. ahmed sharkawy_1 – Kunk, ChessWorld.net, 2005.

4.Nf3 f6 =.

3.Nf3 a6

4.e3 Nf6 5.c4 dc4 6.Bc4 Ne4 (6...e6 7.a3=) 7.Ne5 (7.Qc2 Nf6+=) 7...f6?? (better is 7...Nd6 8.Bb3 Nd7+=) 8.Bf7 1–0. Wall,Bill – Kbaby, internet, 2002.

4.e3 Nf6 5.d3 Nbd7 6.a3 Qc7 7.Be2 e5 8.0–0 Bd6 9.Nbd2 0–0 10.h3 Re8 (10...a5 11.Qb1+=) 11.c4= b6 12.e4 (12.cd5 cd5 13.Rc1 Qb7=) 12...d4+= 13.Nb3 c5 14.bc5 Bc5 15.a4 Rb8 16.Ba3 h6 17.Rb1?? (17.Nc5 Nc5 18.Bb4+=) 17...Qc6 (17...Ba3 18.Qd2–+) 18.a5?? (18.Nc5 Nc5 19.a5 Bd7=) 18...Bb7 (18...Ba3 19.ab6 Rb6 20.Nfd2–+) 19.Qc2?? (19.Nc5 bc5 20.Qd2 Ba8=) 19...Bc8 (better is 19...Ba3 20.ab6 Nb6–+) 20.Bc1 Nf8 (20...Be7 21.Bd2=) 21.Bd2 Ne6 (21...Bd6 22.ab6 Rb6 23.c5+=) 22.Rb2 (22.Ne5 Qd6 23.Nf3 Nd7+/–) 22...Re7 (22...Bd6 23.Rfb1=) 23.Rfb1 (23.Ne5 Qd6 24.Nf3 Nd7+/–) 23...Ra7 (better is 23...Bd6=) 24.Nc1 Rab7 0–1. Fournier,Frederic (1940) – rabbana (1930), Active (5/0), 2005.

4.e3 h6 5.Be2 Bf5 (5...Nf6 6.c4+=) 6.0–0 e6 7.d3 (7.Nd4 Nf6 8.Nf5 ef5+=) 7...Bb4 (7...Nf6!? 8.Nbd2 Nbd7=) 8.Bg7+– Rh7 9.Bc3 Bc3 10.Nc3 h5 (10...Rg7 11.Qb1 b6 12.Re1+–) 11.Rb1 (11.Qb1 Qc7 12.Qb2 Nd7+–) 11...b5+– 12.h4 Bg4 (12...Rg7 13.e4 Bg6 14.ed5 cd5 15.a4+–) 13.Ng5+– Rh8 14.f3 f6 15.fg4 fg5 16.gh5 Nd7 17.Bg4 e5?? (better 17...Qe7+–) 18.Qf3+– Ngf6 (18...Nh6 19.Nd5! Rf8 20.Bd7 Kd7 21.Nf6 Qf6 22.Qf6 Rf6 23.Rf6+–) 19.hg5 Ng4 (19...Rf8 20.gf6 Nf6+–) 20.Qf7 1–0. Janek – fixiq, internet, 2017.

3.Nf3 b5

4.a4 Qd6 5.e3 Qb4 6.Bc3 Qg4 7.ab5 cb5 8.Bb5 Bd7 9.Bd7 Nd7 10.0–0 Nb6 11.Bd4 Qc8 12.Qc1 Qc6 13.Ne5 Qc8 14.Qb2 e6 15.Bb6 ab6 16.Ra8 Qa8 17.Qb5 Qc6 18.Qc6 Ke7 19.Qd7 Kf6 20.Qf7 Kg5 21.Qf4 Kh5 22.Qg4 Kh6 23.Nf7# 1–0. Bonetti,Shane – ProphetX (1745), ICC, 2002.

4.e3 e6 5.a4 ba4 6.c4 Nf6 (6...Bb4?? 7.Bg7 Nf6 8.Bh8+–) 7.Qa4 Be7 8.Qb3 0–0 9.Be2 h6 10.0–0 Nh7 (10...dc4 11.Bc4 Nd5 12.Bd4+=) 11.d4 dc4 12.Bc4 Ba6?? (better is 12...Qb6+=) 13.Ba6+– (13.Ra6?! Na6 14.Ba6 Qb6+–) 13...Na6 14.Ra6 Qc8 15.Rc1 (better is 15.Qa4+–) 15...Qa6–/+ 16.Nbd2 Rab8 17.Ra1 Qb7 18.Ne5 Qb4 19.Qb4 (19.Qb4 Bb4 20.Ndc4–+). jboger (2210) – johnabc, net–chess.com, 2013.

3.f4 Nd7

4.Nf3= e6 5.e3 Bb4?? (better 5...Ngf6 6.a3 c5=) 6.Bg7+– Be7 7.Bh8 Bf6 (7...Ngf6 8.Nc3+–) 8.Bf6 Qf6 (8...Ngf6 9.Nc3+–) 9.Nc3 b6 10.Bd3 Nh6 (10...h6 11.Rb1+–) 11.Qe2 (11.Bh7 Ba6+–) 11...Nc5 (11...Qg7 12.Rb1+–) 12.0–0 (12.Bh7 Na4 13.Ne5 Nc3 14.dc3 Bb7+–) 12...Bd7 (12...Nd3 13.Qd3 Nf5 14.Ne5+–) 13.Bh7 0–0–0 (13...Ke7 14.d4+–) 14.d4 Nb7 15.Rab1 (15.Ne5 Qg7 16.Bd3 f6+–) 15...Rh8 16.Bd3 Ng4 (16...Nf5 17.Bf5 Qf5 18.Qd3+–) 17.h3 (17.Ne5 Nh2 18.Rf2 Qg7+–) 17...Nh6 18.e4 (18.Ne5 Qg7+–) 18...de4 (18...Qf4 19.Qf2+–) 19.Be4 (19.Ne4 Qg7+–) 19...Qf4 20.Ne5 Qf6 (20...Qg3 21.Rb3 Nc5+–) 21.Rf6 1–0. Adlai – Material, corr, 2018.

4.Nf3 Ngf6 5.e3 e6 6.a3 Bd6 7.Be2 0–0 8.0–0 Qe7 (8...a5 9.b5=+) 9.Ne5 Ne8 (9...a5 10.b5 Qd8 11.d4=) 10.c4 f6 (10...a5 11.c5 Bc7 12.d4=) 11.Nf3 e5 (11...dc4 12.Bc4 a5 13.ba5 Ra5 14.Qc2=) 12.f5+= e4 (12...b6 13.Nc3 Nc7 14.cd5 cd5 15.Qb3+=) 13.Nd4 c5 (better 13...Ne5!? 14.cd5 cd5+–) 14.Ne6+– cb4 (14...dc4 15.Nf8 Kf8 16.Bc4+–) 15.Nf8 (better 15.ab4 dc4 16.Nf8 (worse 16.Bc4 Nb6 17.Bb3 Be6 18.Be6 Kh8+=) 16...Kf8 17.Bc4+–) 15...Nf8? (better 15...Kf8 16.ab4 dc4 17.Bc4 Ne5+–) 16.ab4 Bb4 (16...a6 17.Qc2 Be5 18.Nc3 Bc3 19.Qc3+–) 17.Nc3 Bc3 (17...Qd8 18.Nd5 (18.cd5?! Nd6+–) 18...Bc5 19.Bd4 Bd4 20.ed4+–) 18.dc3 (18.Bc3?! b6+–) 18...dc4 (18...Qe5 19.Qd5 Qd5 20.cd5 Nd6+–) 19.Bc4 Kh8 (19...Ne6 20.Qd5 N8c7 21.Qe4+–) 20.Qd5 Be6 (20...Ne6 21.Ba3 Qd7 22.fe6 Qd5 23.Bd5+–) 21.fe6 Nc7 22.Qb7 Nfe6 1–0. guesticuq – guesthedb, internet free game, 2018.

3.f4 e6

4.Nf3 Bb4?? 5.Bg7+– f6 (5...Nh6 6.Bh8 (6.Bh6?! Qf6 7.c3 Qh6 8.cb4 Qf4+–) 6...f6 7.c3+–) 6.Bh8 Qe7 (6...Nh6 7.c3 Bd6 8.Qc2+–) 7.e3 (7.c4 Nh6 8.Qc2 Nd7+–) 7...h6 (7...Qf7 8.a3 Bd6 9.Bd3+–) 8.a3 (better 8.c3 Bd6 9.Bd3 Qf7+–) 8...Ba5 9.Nh4 (9.f5!? ef5 10.c4 Qh7 11.cd5 Qh8+–) 9...Qh7 10.Qh5 Kd7 (10...Kd8 11.Ng6 Bd7+–) 11.Ng6 Bd8 (11...Kd8 12.Bd3 Nd7+–) 12.Nf8 (12.Nf8 Kc7 13.Nh7+–) 1–0. guestotmk – guestjcwl, internet free game, 2018.

4.Nf3 f5 5.e3 Nf6 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+–) 6.a3 Be7 7.Be2 0–0 8.0–0 Nbd7 (8...a5 9.b5=) 9.Nc3 a6 (9...c5 10.bc5 Bc5 11.Rb1=) 10.Nd4 (10.Rb1 b5=) 10...Nb6= 11.d3 (11.Rc1 c5 12.bc5 Bc5=) 11...Qc7 (11...a5 12.ba5 Ra5 13.a4=) 12.Qd2 c5 (12...Bd7 13.Nf3=) 13.bc5+= Bc5 14.Nb3 (14.a4 Re8+=) 14...Bd6= 15.a4 Nbd7 16.a5 Nc5 (16...e5 17.Ba3=) 17.Nc5+= Bc5 18.Na4 a7 19.Bd4 Bd7 (19...Bd4 20.ed4 Nd7 21.c4+–) 20.Nb6+– Bb6 21.ab6 Qc6 22.Bf3 Rac8 (22...Be8 23.c4!+–) 23.c4 Be8 (23...Qd6 24.Qa5+–) 24.Rfc1 (24.cd5 Nd5 25.Rfc1 Qd7+–) 24...Qd7 25.Bf6 (25.cd5 Rc1 26.Rc1 Nd5+–) 25...Rf6 26.cd5 (26.Qa5 dc4 27.Rc4 Rf7+–) 26...Rc1+= 27.Rc1 ed5 28.Qb2 (better 28.Qa5 Rd6 29.Rc7+–) 28...Bf7? (better 28...Qe6 29.Qd4 Qb6 30.Bd5 Kf8+=) 29.Rc7+– Qd8 30.Rb7 (30.Qc3 Rc6 (30...Rb6?? 31.Rc8 Rd6 32.Qc7+–) 31.Rc6 bc6+–) 30...d4 (better 30...Rd6+–) 31.Rc7 de3 (31...Qb8 32.Qd4 h6+–) 32.b7 (32.b7 e2 33.Be2 Qc7 34.b8Q Qb8 35.Qb8 Be8 36.Qe8 Rf8 37.Qe6 Kh8 38.d4+–) 1–0. Adlai – Beppe, corr, 2018.

4.Nf3 Nf6 5.a3 Nbd7 6.e3 Bd6 7.Be2 Qc7 8.0–0 0–0 9.c4 b6 10.d4 dc4 11.Bc4 Bb7 12.Nbd2 c5 13.bc5 bc5 14.Qe2 Rab8 15.Bc3 Nb6 16.Bd3 Nbd5 17.Bb2 Ng4 18.Nc4 Nge3 19.Ne3 Nf4 20.Bh7 Kh7 21.Qc2 Kg8 22.Rac1 Nd5 23.Nc4 Bf4 24.Rb1 Ne3 25.Ne3 Be3 26.Kh1 Bd5 27.dc5 Qc5 28.Qc5 Bc5 29.Ne5 Rb7 30.h3 Rfb8 0–1. ziggyblitz (2420) – cristero (2465), net–chess.com, 2014. (=1.f4 d5 2.b4 c6 3.Bb2)

3.f4 Bf5

4.Nf3 e6 5.Nc3 Bb4 6.Nd5+/– Bf8 7.Ne3 Nd7 8.Nf5 ef5 9.e3 Ngf6 10.Bd3 Ne4 11.0–0 Ndf6 12.Rb1 Be7 13.Bf6 Bf6 14.Rb7 0–0 15.Ne5 Nd6?? 16.Rd7+– Qb8 17.Nc6 (17…Qe8 18.Rd6+–) 1–0. pierre – buzan, internet, 2009.

4.Nf3 Nf6 5.Nc3 e6 6.a3 Bd6 7.e3= Bg4 8.h3 Bf3 9.Qf3 0–0 10.g4 b6 11.g5 Nfd7 12.h4 e5 13.h5 ef4= 14.ef4 Re8 15.Ne2 a5 16.h6 ab4?? 17.hg7+– ba3 18.Qh5 f6 19.Qh7 Kf7 20.g8Q# 1–0. pierre – maccabic, internet, 2009.

4.Nf3 Nf6 5.e3 e6 6.Nh4 h6 7.Nf5+= ef5 8.Be2 Bb4=+ 9.0–0 0–0 10.c3 Ba5 11.a4 Nbd7 12.Na3 Nc5 13.Nc2 Nb3 14.Rb1 Qd6?? 15.d4 Ne4 16.Ba3 Nc3? 17.Bd6+– Nd1 18.Rfd1 Rfd8 19.Rb3 Rd6 20.Rb7 Rdd8 21.Rdb1 Bc3 22.Nb4 Bb4 23.R1b4 a5 24.R4b6 Rdc8 25.Ra6 Ra6 26.Ba6 Ra8 27.Rb6 Re8 28.Kf2 Re6 29.Bb7 Re8 30.Rc6 Rb8 31.Rc8 Rc8 32.Bc8 Kf8 33.Bf5 g6 34.Bh3 Ke7 35.Kf3 f5 36.g4 fg4 37.Kg4 Kf6 38.Bg2 h5 39.Kg3 Ke6 40.Kh4 Kf6 41.Bd5 Kf5 42.Kg3 g5 43.fg5 Kg5 44.e4 h4 45.Kf3 Kh5 46.e5 Kg6 47.Kg4 h3 48.Kh3 Kf5 49.Kh4 Kg6 50.Kg4 Kg7 51.h4 Kf8 52.Kg5 Kg7 53.h5 Kh7 54.e6 Kg7 55.h6 Kh7 56.e7 Kh8 57.e8Q Kh7 58.Qg8# (58.Be4#) 1–0. TeaCzar – gordiemac, ChessWorld.net, 2009.

3.g3 a6

4.Bg2 Nf6 5.Nf3 h6 6.0–0 e6 7.a3+=.

4.Bg2 Nf6 5.Nf3 h6 6.0–0 Bf5 7.d3 (7.c4 e6+=) 7...e6 8.a3 (8.Nbd2 Bb4 9.Rb1 Qe7+=) 8...Be7 (8...a5 9.b5+=) 9.Nbd2 (9.Re1 0–0+=) 9...0–0 10.c4 (10.Re1 c5=) 10...Qb6 (10...Nbd7 11.Qb3=) 11.Qb3 (11.c5 Qc7+=) 11...Nbd7 12.Rac1 (12.Bd4 c5 13.bc5 Qb3 14.Nb3 dc4 15.dc4 Rac8+=) 12...Qc7 (12...a5!? 13.Bd4 Qc7=) 13.cd5+= Nd5?? (better 13...ed5 14.Nd4 Bg6+–) 14.e4+– Bh7 (14...a5 15.ed5 ed5 16.Nd4+–) 15.ed5 ed5 16.Qd5! Nc5 (16...cd5 17.Rc7 Pinning (17.Rc7 Deflection)) 17.Rc5 Bc5 (17...Rad8 18.Qc4 Bc5 19.bc5 Bd3 20.Qc3+–) 18.Qc5 Bd3 (18...Rfe8+–) 19.Qd4 (19.Qc3 f6 20.Qd3 Rae8+–) 19...f6 20.Qd3 Rad8 21.Nd4 Rf7 22.Qc4 Qe5 23.N2f3 (better 23.Nc6 Rd4 24.Nd4 Qc7+–) 23...Qe8 24.Nf5 Kh7 25.N3d4 g6 26.Nh6! Kh6 27.Ne6 Rd5 28.Bd5 (28.Bd5 g5 29.Qg4 Qg8 30.Bf3 Qg6 31.Qh3 Qh5 32.Qh5) 1–0. Shamieh,Jamal (2095) – Hamdoun,Rian, 8th Beirut International Open, 2015.

4.Bg2 Nf6 5.Nf3 h6 6.0–0 Bg4 7.h3 (7.c4 e6+=) 7...Bf3= 8.Bf3 b5 (8...e6!?=) 9.Nc3 (9.d4 e6 10.a3 Nbd7+=) 9...Qd6 (9...a5 10.a3+=) 10.d3 (better 10.a3+–) 10...Qc5?? (better 10...Qb4!? 11.Qc1 Nbd7=) 11.Rb1 (better 11.bc5 e5 12.d4 ed4 13.Qd4+–) 11...Qa7+– 12.a3 Qb6 (12...e6 13.e4+–) 13.Nd5?? (better 13.e4 e6 14.e5+–) 13…Qc5 1–0. Shamieh,Jamal (2095) – Hamdoun,Rian, 8th Beirut Open, 2015.

3.g3 Nd7

4.Nf3 e5 =+.

4.Nf3 Ngf6 5.Bg2 e5 6.c3 (6.Ne5 Bb4 7.Nd3 Bd6+=) 6...Bd6–/+ 7.d3 0–0 8.Nbd2 a5 9.ba5 Qa5 10.0–0 Nc5 (10...b5 11.c4–/+) 11.Nb3 Qb6 12.d4 ed4 13.cd4 Na4 14.Bc1 Nc3 15.Qd3 (15.Qc2 Nfe4–/+) 15...Na2 16.Bd2 Ra3 (16...Ne4 17.Ng5 f5 18.Rfb1–/+) 17.Qb1 (17.Rfb1 Nb4 18.Bb4 Qb4 19.Ra3 Qa3–/+) 17...Rb3 18.Qa2 Rb2 19.Qa4 Ne4 20.Ba5 Qa6 (20...Qa6 21.e3 Re8–+) 0–1. Zagierski,Adam (1810) – Ciesielski,Stefan (1720), corr, 2003.

4.Bg2 e5 5.a3 f5 6.e3 (6.c4 dc4 7.Qc2 e4+=) 6...Ngf6 7.Ne2 Bd6 (7...a5 8.f4 e4 9.b5+=) 8.0–0= 0–0 9.f4 e4 10.Nd4 Nb6 11.h3 (11.Nb3 Na4 12.Bd4 b6+=) 11...Nc4 (11...a5 12.b5 Nc4 13.Bc1–/+) 12.Bc1 (12.Bc3 a5 13.ba5 Na5–/+) 12…a5 (12...a5 13.d3 Nb6+=; 12...Re8 13.Re1–/+) 0–1. ball – Brukske, internet, 2006.

4.Bg2 e5 5.a3 Ngf6 6.d3 Bd6 7.Nf3 0–0 8.0–0 e4 9.de4= White gets in control 9...Ne4 10.c4 (10.Nbd2 Nd2 11.Nd2 a5=) 10...Ndf6 (10...dc4 11.Nbd2 c3 12.Ne4 cb2 13.Rb1=) 11.Nbd2 Nd2 12.Qd2 Bg4 (12...dc4 13.Rad1 Bc7 14.Qg5+=) 13.cd5 Nd5 14.e4 Opening the d–file gets White a lot of play 14...Bf3 15.Bf3 Ne7?? (better 15...Nb6+=) 16.Qd4+– Threatening mate: Qxg7 16...f6 17.Rad1 Be5?? (17...Nc8 18.Bg4 Re8+–) 18.Qc4 Nd5 19.ed5 Qb6 (19...c5 20.Be5 fe5 21.d6 Kh8 22.Bb7+–) 20.dc6 Kh8 21.cb7 Rab8 22.Be5 fe5 23.Qg4 (23.Qc6 g6+–) 23...h6 (23...Qf6 24.Rc1 Qd8 25.Rfd1+–) 24.Rd7 Qf6 25.Rc7 Rf7 (25...Rfd8 26.Rfc1 e4 27.Be4 Rb7 28.Rb7 g6 29.Rc8 Qa1 30.Kg2 Qd4 31.Rh7 Kh7 32.Qg6 Kh8 33.Qh7) 26.Rf7 Qf7 27.Rc1 (27.Rc1 Rb7 28.Qc8 Kh7 29.Bb7+–) 1–0. Pierre – Ondveel, internet, 2019.

4.Bg2 e5 5.a3 Ngf6 6.Nf3 Bd6 7.0–0+=.

4.Bg2 e5 5.e3 Bb4–/+ 6.a3 (6.Qg4 Bf8–+) 6…Ba5 (6...Bd6 7.Ne2–+) 0–1. Ramiz – Netto, internet, 2006.

4.Bg2 e5 5.Nf3!? Bd6 6.c4 =+.

3.h3 Nf6=+

4.e3 Nbd7 5.d4 e6 6.a3 Bd6 7.Nd2 0–0 8.Ngf3 Re8 9.Bd3 e5 10.de5= Ne5 11.Ne5 Be5 12.Be5 Re5 13.Nf3 Re8 14.0–0 Qe7 15.Re1 Ne4 16.Nd4 a5 17.ba5 Ra5 18.Be4 de4–/+ 19.Qd2 Rg5 20.a4? Bh3–+ 21.g3 h5 22.Kh2 Bg4 23.Reb1 Rd5 24.Qb4 Qb4 25.Rb4 c5 26.Rb5 Red8?? 27.Rb7?? cd4–+ 28.a5 d3 29.a6 d2 30.c4 d1Q 31.Rd1 Rd1 32.c5 Bf3 33.g4 h4 (34.Rb1 Rb1 35.a7 Rh1#) 0–1. novice1234 – TeaCzar, ChessWorld.net, 2009.

4.Bf6 ef6 5.Nf3 Bb4–/+ 6.a3 Ba5 7.e3 0–0 8.Be2 c5 9.0–0 Re8 10.d4 c4 11.c3 Nc6 12.Nbd2? Bc3–+ 13.Rb1 b6 14.Qc2 Bd2 15.Qd2 f5 16.Rfe1 a6 17.Bd1 b5 18.Bc2 Be6 19.Ne5 Qh4?? 20.Nc6+– Rec8 21.Ne5 f6 22.Nf3 Qh6 23.Qb4 g6 24.Qe7 Qf8?? 25.Qe6 Kg7 26.Qd5 h6 27.Nh4 h5 28.Qf3 Ra7 29.Red1 Kh6 30.d5 Rd7 31.e4 fe4 32.Qe4 f5 33.Qe3 Kh7 34.Re1 c3 35.Qg3 Rd5 36.Qg6 Kh8 37.Qh5 Kg8 38.Bb3 Kg7 39.Bd5 c2 40.Nf5 Kf6 41.Re6# 1–0. novice1234 – pieeater, ChessWorld.net, 2009.

3.h4 Nd7

4.Nf3 e5 5.Ne5 Bb4?? (5...Ne5 6.Be5 f6 7.Bf4 Bb4 8.e3=+) 6.Nd7?? (better 6.Nc6 bc6 7.Bg7+–) 6...f6= 7.a3 Bd6 8.e3 Bd7 (8...Kd7? 9.Qg4 Kc7 10.Qg7 Ne7 11.Bf6+–) 9.Qh5 Kf8 10.Bd3 Be8 11.Qf3 Bg6 12.h5 (12.Bg6 hg6 13.Nc3 Ke8=) 12...Bd3=+ 13.cd3 Nh6 14.g4 Nf7 (14...Kg8 15.Rg1=+) 15.h6= Be5 (15...Nh6? 16.Rh6 Kf7 17.Rh5+–) 16.hg7 Kg7 17.Be5 Ne5 18.Qf5 Qc8 19.Qc8 Rac8 20.Ke2 Ng4 21.Rg1 h5 22.f3 f5 23.fg4 hg4 24.Nc3 Kf6 25.Rab1 b6 26.e4 (26.Rbf1!? Rh2 27.Ke1+=) 26...d4=+ 27.Nd1 Rh2 28.Ke1 Rch8 29.ef5 Kf5 30.Nf2 Re8 31.Kf1 Rg8 32.Ne4 Kf4 33.Rb4 (33.Re1!? Rg6 34.Ng3=) 33...c5–/+ 34.Ra4 Rg7 35.Rc4 (35.Rg2 Rh3–/+) 35...Rgh7 (35...g3 36.Ke1–+) 36.Rc2 Rh1 37.Nf2 Rg1 38.Kg1 Kf3 39.Rc1 g3 40.Ne4 g2?? (better 40...Ke2–/+) 41.Ng5+– Kg4 (41...Ke2 42.Nh7 Kd2+–) 42.Nh7 Kf3 43.Re1 a6 44.Ng5 Kg4 45.Ne4 Kf3 46.Rd1 (better 46.Rb1 c4+–) 46...Ke2 47.Rb1 (47.Nf2!? b5+–) 47...Kd3 48.Nd6 (better 48.Nf2!? Kd2 49.Rb6 c4+–) 48...b5 49.Kg2 (49.a4!? ba4 50.Ra1 Kd2 51.Ne4 Ke2 52.Nc5 d3 53.Ra2 d2+–) 49...Kd2 50.Rb2 (50.a4!? b4+–) 50...Kc3 51.Rf2 d3 52.Ne4 Kb3 (52...Kd4 53.Kf3+–) 53.Kf3 (better 53.Nc5 Ka3 54.Na6 Kb3+–) 53...c4 54.Nd2 (54.Ke3 Ka3 55.Rf6 Kb4+–) 54...Ka3 55.Rf1 (55.Ke3 c3 56.Ne4 c2+–) 55...Kb4? (better 55...Kb2+–) 56.Ne4 a5 (56...Ka5+–) 57.Rb1 Ka3 58.Nd2 (58.Rb5 a4 59.Nd2 Ka2 60.Nc4 a3 61.Ke3 Ka1 62.Na3 Ka2 63.Nc4 d2 64.Kd2 Ka1 65.Kc2 Ka2 66.Ra5) 58…c3 (58...c3 59.Rb3 Ka4 60.Rc3 Kb4 61.Rd3 a4 62.Rd4 Ka3 63.Ke4 Kb2 64.Kd3 b4 65.Rb4 Ka3 66.Kc3 Ka2 67.Ra4). beatmeeasy (1960) – juches02 (1965), lichess.org, 2021.

4.Nf3 e6 5.g4 Bb4?? (better 5...e5=+) 6.Bg7+– Be7 (6...h5 7.Bh8 hg4 8.Nd4+–) 7.Bh8 Bf6 8.Bf6 Ngf6 9.g5 Ne4 10.d3 Qa5 11.c3 Nc3 12.Nc3 (better 12.Qd2 d4 13.Nd4 Qd5+–) 12...Qc3 13.Nd2 e5 14.Qc1 Qa5 15.f3 Nf8 16.Kf2 (16.Qb2 d4+–) 16...Ne6 17.Nb3 Qb6 18.e3 a5 19.Rb1 a4 20.Nd4 Qa5 (20...Qc7 21.Ne6 Be6 22.Bh3+–) 21.Ne6 Be6 (21...fe6 22.d4+–) 22.Rb7 d4 23.Qc6 Kf8 24.Rb5 (better 24.Be2!? Kg8 25.Rb5 Qd8 26.Re5 Ba2+–) 24...Qd2 25.Kg3 (better 25.Be2 Qe3 26.Kg3 Qf4 27.Kg2+–) 25...Qe3?? (better 25...Qe1 26.Kg2 Qd2 27.Be2 Qe2 28.Kg3 Rc8+–) 26.Qa8 Kg7 27.Qe4 (better 27.Qd8 Qf4 28.Kg2+–) 27...Qd2 28.Qe5 Kg6 (28...Kf8 29.Rb8 Ke7 30.Rb7 Kd8 31.Qh8) 29.h5 1–0. beatmeeasy (1970) – beeshline (1965), lichess.org, 2021.

4.Nf3 Ngf6 5.a3 h5 6.Rg1 g6 7.Nc3 Bg7 8.d4 a5 9.b5 Nb6 10.bc6 bc6 11.e3 Ba6 12.Ba6 Ra6 13.Nd2 e5 14.de5 Ng4 15.Qe2 Ra8 (worse 15...Qh4 16.Nf3 Qf2 17.Qf2 Nf2 18.Kf2+–) 16.f4 Qh4 17.g3 Qd8 18.Nb3 (18.e4!?=+) 18...Nc4–/+ 19.Bc1 a4 20.Nd4 Rc8 (20...Qa5 21.Bd2 Nge3 22.Nd1 Nd2 23.Qd2 Qd2 24.Kd2 Nc4 25.Kd3–/+) 21.Kf1 (better 21.Qd3!?–/+) 21...Qa5–+ 22.Na2 0–0 (22...f6 23.Qd3 Rh6 24.ef6 Bf6 25.c3–+) 23.Nf3 (better 23.Qd3!?–/+) 23...Qc5–+ 24.Nd4 Na3 25.Qd3 Nc4 26.Nc3 a3 27.Na4? (better 27.Ba3 Na3 28.Na4–/+) 27...Qb4–+ 28.Ra3 Na3 29.Qa3 Qa3 30.Ba3 Rfe8 (30...Ne3?! 31.Ke2 Rfe8 32.Ke3–+) 31.Bd6 Ra8 32.Nc5 Ne3 33.Ke2 (33.Kf2 Ng4 34.Kf3 Ra3 35.Ncb3–+) 33...Ng4?? (better 33...Nc4 34.Kd3 f6 35.Nc6 fe5 36.fe5 Rac8 37.Ne7 Re7 38.Be7 Ne5 39.Ke2 Re8–+) 34.Nc6–/+ Rac8 (34...f6 35.e6–/+) 35.Ne7 Re7 36.Be7 Bf8 (better 36...Nh6!? 37.Na4 Re8–/+) 37.Bf8= Kf8 38.Nd3? (better 38.Nd7 Ke7 39.Nb6=) 38...Rc2–+ 39.Kf3?? (39.Kd1 Ra2 40.Ne1 g5–+) 39...Rc3 (better 39...Rd2–+) 40.Ke2–/+ Ke7 41.Rb1 Rc2 42.Kd1 (42.Ke1 Ne3–/+) 42...Rg2–+ 43.Rb7 Kf8 44.Nb4 Rg3 45.Kd2 d4 46.Nc6 Rg2 (46...d3!? 47.Nb8–+) 47.Kd3 Ra2 (47...Rf2!? 48.e6 fe6 49.Nd4 e5 50.Ne6 Ke8–+) 48.Rb8 Kg7 49.Ne7? (better 49.Rb7 Rf2 50.Nd4–/+) 49...Ra3–+ 50.Kd4 Ra4 51.Kc5 Ra2?? (better 51...Rf4 52.Nc6 h4–+) 52.Rg8–/+ Kh7 53.Rf8 Rc2 54.Kd4 Kg7 (54...Nh6!?=+) 55.Kd3?? (55.Rg8 Kh7 56.Rf8=+) 55…Rf2 (55...Rf2 56.Rg8 Kh7–/+; worse 55...Kf8 56.Kc2 h4 57.Kd3–+) 0–1. beatmeeasy (1930) – EGBERTONE (1945), lichess.org, 2021.

3.h4 e6

4.Nf3 Nd7 5.g4 Ngf6 (5...Bb4?? 6.Bg7 h5 7.Bh8 hg4 8.Nd4+–) 6.g5 Ne4 7.d3 Bb4 8.c3 Nf2 (8...Qb6!? 9.de4 Bc5=+) 9.Kf2+= Bc5 10.d4 Bd6 11.h5 (11.Nbd2 h6+=) 11...Qc7 12.Rg1 e5 13.Nbd2?? (better 13.e3=) 13...e4–+ 14.Ne1 0–0?? (better 14...Bh2 15.e3 Bg1 16.Kg1 Qg3 17.Ng2 Qg5–+) 15.e3= f6 16.g6 h6 17.Qg4 (17.c4 f5=) 17...Ne5 (17...f5!? 18.Qh4 f4=+) 18.Qh4= Ng4 (better 18...Be7!?=) 19.Rg4+– Bg4 20.Qg4 f5 21.Qg2 f4 22.ef4 Bf4 23.Ke2 Qb6 (23...Bd2!? 24.Kd2 Qf4 25.Ke2 Qf5+–) 24.Nb3+– Qb5 25.Kd1 Qa4 26.Qg4 Bg5 (26...Rae8 27.Qd7 b6 28.Qb7+–) 27.Qe6 Kh8 28.Be2 Rae8 29.Qd7 Re7 (29...b6 30.Nc2 Rd8 31.Qb7+–) 30.Qg4 (30.Qd6 Ree8+–) 30...b6 31.Nc2 Rc7 32.Ba3 Re8 33.Bd6 Rf7 (33...Rb7 34.Nb4 Rd8 35.Qe6+–) 34.Be5 (34.gf7 c5+–) 34...c5?? (34...Rfe7 35.Qg3+–) 35.Qg2 (better 35.gf7 Qc6 36.fe8R Qe8 37.Nc5 Qf7+–) 35...cd4?? (35...Rff8 36.Bd6 Be7 37.dc5 bc5 38.Nc5+–) 36.cd4 (36.gf7 Rf8 37.Ncd4 Qd7+–) 36...Rc8?? (36...Rff8 37.Qg3+–) 37.Qg4 (better 37.gf7 Rf8 38.Qh3 Rf7 39.Qc8 Kh7+–) 37...Qc6 (37...Rff8+–) 38.Nb4 Qc3 39.Rb1 (39.Ba6 Rcf8 40.gf7 Qb4 41.Rc1 Rf7 42.Rc8 Rf8 43.Rc7+–) 39...a5 (39...Rf2+–) 40.Nd5 (better 40.gf7 ab4 41.Qc8 Qc8+–) 40...Qc6?? (40...Qc2 41.Ke1 Qb1 42.Bd1 Rf5+–) 41.Qc8! Qc8 42.Nd2 (42.gf7 Qf8+–) 42...Qe6?? (better 42...Rf8 43.Ne4 Qh3 44.Ng5 Qh1 45.Kc2 Qd5 46.Nf7 Kg8 47.Rb6 Qa2 48.Kd3 Qa3 49.Ke4 Qc3+–) 43.Rb6 Qd5 (43...Qb6 44.Nb6 Rb7+–) 44.Rb8 Bd8 45.Rd8! Qd8 46.gf7 Qf8 47.Ne4 (47.Bc4 e3 48.Nf1 e2 49.Ke2+–) 47…Qf7+–. beatmeeasy (1920) – emreerden (1995), lichess.org, 2021.

4.Nf3 f5 5.h5 Nf6 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+–) 6.a3 Bd6 7.Bf6 Qf6 8.Nc3 0–0 9.d4 Bd7 (9...Nd7 10.e3–/+) 10.Qc1 Be8 11.h6 g6 12.Qg5 Nd7 13.Qf6 Nf6 14.Ng5 (14.Na4!?=) 14...Bd7 15.e3 White prepares the advance b5 15...Ne4 (15...b5!?–/+) 16.Nge4 fe4 17.b5 (17.Na4 Rf6 18.Be2 Raf8=+) 17...Rf6 (17...Bc7 18.Na2–/+) 18.bc6=+ bc6 19.Be2 Raf8 20.f3 (20.Nd1 e5=+) 20...Bg3 (better 20...ef3!? 21.Bf3 e5–/+) 21.Kd2= ef3 22.gf3 e5 23.Rag1 ed4 24.Rg3 dc3 25.Kc3 Re8 26.f4 Rfe6 27.Kd2 Rf6 28.Rb1 Bf5 29.Rb7 Rf7 30.Rf7 Kf7 31.Ba6 Rb8 32.Kc3 Rb6 33.Be2 a5 34.Bg4 Kf6 (34...Be4 35.Rg1=+) 35.Bf5= Kf5 (worse 35...gf5 36.Rg7+–) 36.Rg5 Kf6 37.Kd4 Rb2 38.c3 (38.c4 Rd2 39.Kc5 Rd3 40.cd5 cd5=) 38...Rb3 (better 38...Rd2!? 39.Kc5 Rd3 40.Kc6 Rc3 41.Kb5 Ra3 42.Rd5 Re3–/+) 39.c4+= dc4 (39...c5 40.Kd5 Re3+=) 40.Kc4 (better 40.Ra5 Rd3 41.Ke4+–) 40...Re3= 41.Ra5 Re4 (41...Rh3 42.Rc5=) 42.Kc5= Rf4 43.Kc6 (43.Ra7!?=) 43...Rh4=+ 44.a4 Rh6 (44...g5 45.Kd5–/+) 45.Ra6 (45.Rc5!? Rh1 46.a5=) 45...Rh3 46.Kb7 Kf5 (46...Ke5 47.Rb6=+) 47.Ra5 (47.Rb6 Ra3 48.Rb5 Ke4=) 47...Kf4 (47...Ke4 48.Rb5=) 48.Rb5 Ra3 (48...Re3 49.a5=) 49.a5= g5 (49...Re3 50.a6 Re7 51.Kb6 Re6 52.Ka5+=) 50.a6+= g4 51.Rb4 Kf3 52.a7 g3 53.Rb3?? (53.a8Q Ra8 54.Ka8=+) 53...Rb3–+ 54.Kc7 Ra3 55.Kb7 h5 56.a8Q Black now must not overlook the idea g2 56...h4 (better 56...Ra8 57.Ka8 h4–+) 57.Qa3+– (57.Qa3 Kg2 58.Qb2 Kh3 59.Qc3+–) 1–0. beatmeeasy (1910) – Emmy101 (1940), lichess.org, 2020.

4.Nf3 Nf6 5.a3 g6 (5...a5 6.b5=+) 6.Rg1 (6.g4 h6+=) 6...Bg7 7.g4 Rg8 8.g5 Nh5 9.Bg7 Ng7 10.d3 Qd6 11.Qc1 e5 (11...a5 12.b5+=) 12.e4 (12.Qb2 Nd7+=) 12...de4 (12...Be6!?=) 13.de4+= Nd7 (13...Be6!?+=) 14.Qb2 b6 (14...Ne6!?+–) 15.Nbd2+– Bb7 (15...b5 16.a4 Rb8 17.ab5 cb5 18.0–0–0+–) 16.Nc4 (16.Bh3 Ne6 17.0–0–0 0–0–0+–) 16...Qc7 (16...Qe7 17.Bh3 (17.Nfe5?! Ne5 18.Qe5 Rd8+–; 17.Nce5?! Ne5 18.Qe5 Rd8+–) 17...Ne6 18.0–0–0+–) 17.Nce5 (better 17.Bh3!? Ne6 18.0–0–0+–) 17...Ne5 18.Qe5 Qe5 19.Ne5 Ke7 20.0–0–0 Rgd8 21.Bc4 Ne6 22.Ng4 (22.f4 b5 23.Be6 Ke6+–) 22...Rd4 23.Be6 Rd1 24.Rd1 Ke6 25.Nf6 Rh8? (better 25...c5+–) 26.Rd7+– Bc8 (26...Rb8+–) 27.Ra7 h6 28.Rc7 hg5 29.hg5 Rh1 (29...Ke5 30.Rf7 Kf4+–) 30.Kb2 Ba6 31.Rc6 Ke7 (31...Ke5 32.Rb6 Bf1 33.a4+–) 32.Rb6 Bc4 33.Rc6 Be6 (33...Bb5 34.Rc5 Be2 35.b5+–) 34.b5 Rg1 (34...Rh8 35.b6 Ra8 36.b7+–) 35.b6 Rg5 36.c4 Bc4 (36...Kf6 37.b7 Rg4 38.b8Q Re4 39.a4+–) 37.Rc4 Rb5 38.Rb4 (38.Rb4 Rb4 39.ab4+–) 1–0. beatmeeasy (1950) – wong_wnosobo (1990), lichess.org, 2021.

4.Nf3 Nf6 5.c3 a5 6.ba5 Ra5 7.Rg1 Nbd7 8.Qc2 Nc5 9.g4 Nce4 10.g5 Nd7 11.d4 h6 12.Bc1 Be7 13.a3 hg5 14.hg5 g6 15.e3 (15.Nbd2 Nd2 (15...Bg5? 16.Ne4 Bc1 17.Nd6 Ke7 18.Nc8 Qc8 19.Qc1+–) 16.Nd2 c5=+) 15...Qc7 (better 15...Ng5!? 16.Ng5 Bg5–/+) 16.Bd3=+ f5 (better 16...Nd6!?=+) 17.gf6+= Ndf6 (17...Ndf6 18.Rg6 Discovered attack; 17...Nef6 18.Rg6 Discovered attack (18.Bg6 Pinning; 18.Bg6 Deflection); 17...Bf6 18.Rg6 Discovered attack) 18.Be4 (18.Nbd2 c5+–) 18...Ne4+= 19.Ne5 (19.Nbd2 Rf8 20.Ne4 Rf3 21.Ng3=) 19...g5?? (better 19...Bh4 20.Rg2 Rf8=+) 20.f3+– c5? (better 20...Nd6 21.Qg6 Kd8+–) 21.fe4+– cd4 (21...Ra6 22.c4 cd4 23.ed4 dc4 24.Qc3+– (24.Nc4?! b5+=)) 22.ed4 Rg8 (22...Ra6 23.Qe2+– (23.Bg5?! Bg5 24.Rg5 Rh1 25.Kf2 Qh7+–)) 23.ed5 (23.Qh2 Bf6 24.Qh5 Kd8 25.Rg5 Rf8+–) 23...Rd5 (23...Bd6 24.Rg5 Rg5 25.Bg5+–) 24.Qh7 Re5 25.de5 (better 25.Kd1!? Rf8 26.de5 Qe5 27.Bg5 Bg5 28.Qg6 Kd7 29.Qg5 Rf1 30.Kc2 Qe4 31.Kb2 Rg1 32.Qg1 Qe2 33.Kc1 Kd8+–) 25...Qe5 26.Kd1 Rg7 27.Qh5 Kd7 28.Kc2 (28.Ra2 Qb5 29.Rb2 Qa4 30.Rc2 Qe4+–) 28...Qe4 (28...Qf5 29.Kb3+–) 29.Kb2 b6 (29...Qe5 30.Rd1 Kc7 31.Ra2+–) 30.Rd1 (30.Bg5!? Bb7 31.Rd1 Bd5 32.Be7 Rg2 33.Rd2 Ke7+–) 30...Kc7 31.Qh2 Kb7 32.Nd2 Qc6 33.Qe5 (33.Qe5 Rf7 34.Qe2+–) 1–0. beatmeeasy (1970) – Geranboy (1980), lichess.org, 2021.

3.h4 h5

4.Nf3 Bf5 5.d3 Na6 6.a3 e6 7.Nbd2 Bb4? (better is 7...Nf6) 8.ab4 Nb4 9.Bg7 Rh7 10.Bb2 f6 11.Nd4 Bg6 12.Ne6 Qe7 13.Nf4 Bf5 14.e3 0–0–0 15.c3 Na6 16.d4 Nc7 17.Ra7 Nb5 18.Bb5 cb5 19.Nb3 Qe4 20.Nc5 Qc2 21.Ra8 Kc7 22.Na6 Kb6 23.Qc2 Bc2 24.Rd8 1–0. Wall,Bill – Bubbolit, FICS, 2012.

4.Nf3 f6 5.Nc3 e5 6.d4 (better 6.a3!?=+) 6...e4–/+ 7.Nd2 f5 (7...Bb4 8.e3–/+) 8.a3 Nf6 9.b5 (9.e3 Bd6=+) 9...f4 10.e3 (10.Bc1 e3 11.fe3 Ng4–+) 10...Bg4 (better 10...fe3!? 11.fe3 Bd6–+) 11.f3=+ fe3 12.fg4 (better 12.Nde4!? Ne4 13.Ne4=) 12...ed2–/+ 13.Qd2 Ng4 14.0–0–0 (14.Be2 Be7 15.Bg4 hg4–+) 14...cb5 (14...Be7 15.bc6 Nc6 16.Be2–+) 15.Nb5 (15.Bb5!? Nc6 16.Qf4–/+) 15...a6–+ 16.Nc3 Nc6 (16...g6!? 17.Kb1 Bh6 18.Qe1–+) 17.Be2 Nf2 (better 17...g6!? 18.Kb1 Bh6–+) 18.Bh5–/+ Rh5 19.Qf2 Qf6?? (better 19...Qa5 20.Rdf1 0–0–0–/+) 20.Qf6+– gf6 21.Rhf1?? (21.g4 Rh6 22.Nd5 0–0–0+–) 21...Ke7?? (better 21...Rd8–/+) 22.g4+– Bh6 23.Kb1 Rh4 24.Nd5 Kd6 25.Nf6 e3 26.Rde1 (26.d5 Ne7 27.Ne4 Kd7+–) 26...Rh2 (26...Na5!?+–) 27.g5!+– e2 (27...Bg5 28.Ne4 Double attack (28.Ne4 Decoy)) 28.Rf3 Bg7 29.Ne4 Kd5 30.Nc3 Kc4 (better 30...Kd6 31.Re2 Rh1 32.Ka2 Nd4+–) 31.Ne2 Re8 32.Rc3 Kb5 33.a4?? (better 33.d5 Na5 34.Nd4 Bd4 35.Re8 Bc3 36.Bc3 Rh1 37.Re1+–) 33...Kb6 34.Rb3 Ka7 (34...Kc7 35.d5 Na5 36.Bg7 Nb3 37.cb3 Kd6=) 35.d5+– Bb2 (35...Na5!? 36.Bg7 Nb3 37.cb3 Ree2 38.Bd4 Kb8 39.Re2 Re2 40.g6+–) 36.dc6 (36.Kb2?! Na5 37.Rg3 Rhe2 38.Re2 Re2+–; 36.Rb2?! Ree2 37.Re2 Re2 38.dc6 bc6=) 36...bc6 37.Rb2?? (better 37.Kb2 Ree2 38.Re2 Re2 39.Rg3+–) 37...Ree2 38.Rg1 Rhg2 39.Rh1 Re7 40.Rh5 (40.Rh6 Rg5 41.Rc6 Rb7 42.Rb7 Kb7+–) 40...Rg7 (40...Rg4 41.Rb3+=) 41.Rb3 (better 41.Rh6!?+–) 41...R2g5= 42.Rbh3 (42.Rg5 Rg5 43.Rb4 c5=) 42...Rb7 43.Kc1 Rg1 (43...Rh5 44.Rh5 Rb4 45.a5=+) 44.Kd2= Rg2 45.Kc3 a5? (better 45...Rbg7!?=) 46.Ra5+– Kb6 47.Rah5 Ra7 48.R3h4 Rg3 49.Kc4?? (better 49.Kb2!?+–) 49...Ra3 (49...Ra4) 50.a5 R7a5 51.Ra5 Ra5 52.Kb3 Rb5 53.Rb4 Kc5 54.Rb5 Kb5 55.c4 Kc5 56.Kc3 Kd6 57.Kb3 c5 58.Ka4 Ke5 59.Kb5?? (better 59.Ka5=) 59…Kd4–+ (59...Kd4 60.Ka4 Kc4 61.Ka3 Kc3 62.Ka4 c4 63.Kb5 Kd3 64.Kc5 c3 65.Kd5 c2 66.Kd6 Kd4 67.Kc6 c1Q 68.Kd6 Qh6 69.Ke7 Kd5 70.Kf7 Ke5 71.Kg8 Qg6 72.Kf8 Qh7 73.Ke8 Ke6 74.Kd8 Qd7) 0–1. beatmeeasy (1950) – Johncepot (2050), lichess.org, 2021.

4.Nf3 Nf6 5.a4 Bg4 6.b5 c5 7.c3 (7.Ne5 Bf5=) 7...a6 8.Qb3 (8.ba6 ba6 9.c4 e6=+) 8...ab5 (8...c4!? 9.Qc2 e6–/+) 9.Qb5=+ Nbd7 10.Ne5? (10.c4 e6=+) 10...b6 (10...Ra5 11.Ng4 Rb5 (11...hg4?! 12.Qb7 c4 13.Ba3=) 12.Nf6 Nf6 13.ab5 e6–/+) 11.f3 Be6 12.d4 c4 (better 12...Bf5!?=+) 13.Nd2+= g6 14.e4 Bg7 (14...Ra5 15.Qc6 Bh6 16.Bc1=) 15.Ba3 0–0? (better 15...Ra5!? 16.Nc6 Rb5 17.Nd8 Ra5 18.Ne6 fe6+–) 16.Nc6+– Qe8 17.Ne7 Kh8 18.Nc6 Rg8 19.Ne7 Rf8 20.Be2 de4 21.fe4 (worse 21.Bc4 Bc4 22.Nc4 ef3+–; 21.Ne4?! Ne4 22.fe4 Nc5+=) 21...Bg4 (better 21...Bh6!? 22.Qc6 Bd2 23.Kd2 Qd8+–) 22.Bc4+– Ra5 (22...Bh6 23.Qc6+–) 23.Qc6 Ng8 (23...Kh7 24.0–0 Qa8 25.Bb4+–) 24.Ng6! fg6 25.Bf8 Bf8 26.Bg8 (26.Bb5 Qb8 27.0–0 Ne7+–) 26...Kg8 27.Nc4 Ra8 28.Kd2?? (better 28.Qd5 Kh8 29.0–0+–) 28...Rc8–+ 29.Qb7 Rc4 30.e5 (30.a5 ba5 31.Ra5–+) 30...Bh6 31.Kd3 (31.Kc2 Nc5! 32.Qb6 Bf5 33.Kd1 Qa8–+) 31...Rc8 (better 31...Ne5 32.Kc2–+) 32.Raf1 (32.Kc2–+) 32…Bf5 (32...Bf5 33.Rf5 gf5 34.Qd5 Kh8–+) 0–1. beatmeeasy (1910) – Fente (1945), lichess.org, 2020.

3.h4 h6

4.Nf3 Bf5 5.Nd4 Bh7 6.g4 (6.e3 Nf6=) 6...e5 7.Nf5 e4?? (better 7...Bf5 8.gf5 Qf6–/+) 8.Ng7+– (8.Bg7?! Bg7 9.Ng7 Kd7+=) 8...Bg7?? (better 8...Kd7 9.Ne6! Ke6 10.Bh8 Bb4+–) 9.Bg7 f5 (9...e3 10.Bh8 ef2 11.Kf2+–) 10.e3 (10.gf5!? Ne7 11.Bh8 Nf5+–) 10...Nf6 11.Bh8 Ng4 (11...fg4 12.h5+–) 12.h5 Nd7 13.Be2 Qg5 14.Bg4 (better 14.Rh3 Nde5+–) 14...Qg4 (14...fg4 15.Qe2+–) 15.Qg4 fg4 16.Rg1 (better 16.Bg7 Ke7+–) 16...Bf5 17.Bg7 0–0–0 (17...Kf7 18.Bh6 Rh8 19.Bf4 Rh5 20.Nc3+–) 18.Bh6 (better 18.Rh1!? Nf8+–) 18...Rh8 19.Bf4 Rh5 20.Bg3 Nb6 21.a4 Nc4 22.Nc3 White prepares b5 22...a6 23.b5 ab5 (23...Kd7 24.bc6 bc6 25.Rb1+–) 24.ab5 cb5 (24...Nb6 25.bc6 bc6 26.Ke2+–) 25.Nb5 (better 25.Nd5 Kd8 26.d3 ed3 27.cd3 Rh6 28.dc4 bc4+–) 25...Kd7 26.Ra7 Kc6 27.Nd4 Kb6 28.Ra8 Bd7 (28...Kc5 29.Ke2 Bd7 30.Rb1+–) 29.Rd8 (better 29.Ke2 Bb5 30.d3 ed3 31.cd3 Nb2 32.Nb5 Kb5+–) 29...Bc6 30.Nc6 bc6 (30...Kc6 31.d3 Ne5 32.Be5 Re5 33.Rg4 ed3 34.cd3+–) 31.d3 (31.Rb8 Ka6+–) 31...ed3 (31...Na5 32.Ke2 Rh7 33.Rb1 Ka6 34.Ra8 Ra7 35.Ra7 Ka7 36.Bc7+–) 32.cd3 Nb2 (32...Na5+–) 33.Rb8 (33.Rb8 Ka6 34.Ke2+–) 1–0. beatmeeasy (1925) – jcsouza (1855), lichess.org, 2021.

4.Nf3 Bf5 5.g3 e6=+ 6.Bh3 Bh7 7.a4 Nf6 (7...Bb4?? 8.Bg7 Be4 9.Bh8+–) 8.b5 c5 9.e3 Nbd7 10.g4 Be7 11.g5 Nh5?? (11...hg5!? 12.hg5 Bf5=+) 12.gh6 (12.Bg4 Bg6 13.Ng1 hg5 14.hg5 Bg5 15.Bh5+– (worse 15.Rh5 Bh5 16.Bh5 Bf6–/+)) 12...Rg8 13.d3 (better 13.hg7!? Bf6 14.Nc3+=) 13...Bf6=+ 14.d4 cd4 (better 14...gh6!? 15.Nbd2 cd4 16.Nd4 Ng7=+) 15.Nd4+= g6 16.b6 (better 16.a5!?+=) 16...Nb6 17.Nd2 Rc8 18.Nb5?? (18.a5 Nd7=+) 18...a6 (better 18...Bb2 19.Na7 Ra8–+ (worse 19...Ba1 20.Nc8 Bc3 21.Nb6 Qb6 22.Bf1–+)) 19.Nd4 Qc7 (19...Qd7 20.Qg4–/+) 20.a5 (20.Ne6!? fe6 21.Bf6 Nf6 22.Be6=) 20...Nd7–/+ 21.c3 Ne5 22.Bf1 Nc6 Exerts pressure on the isolated pawn 23.Nc6 Qc6 The isolani on c3 becomes a target 24.Bg2 Qb5 (24...Bc3?! 25.Rc1 Bd2 26.Kd2=) 25.Ra2 Bc3 26.Bc3 Rc3 27.Bf1 Qc6 28.Ra1 Nf6 29.Nb3 Ne4 30.Nd4 Qc8 (better 30...Qd6 31.Qa4 Ke7–+) 31.f3?? (better 31.Bd3!?–/+) 31...Ng3 (better 31...Re3 32.Be2 Qc3 33.Kf1 Nd2 34.Kf2 Qd4 35.Qa4 Qa4 36.Ra4 Rb3–+) 32.Rg1 Nf1 33.Kf1 Re3 34.Qa4 Ke7 (34...Kd8 35.Kf2 Rc3 36.Qb4–+) 35.Kf2 (35.Qb4 Kd8–+) 35...Rc3 36.Qb4 Kf6 37.Rab1 Qc7 38.Qb7?? (38.Ne2 Qc5 39.Qc5 Rc5 40.Rb7 Ra5 41.Rg4–/+) 38...Qh2 (38...Qa5?! 39.Ra1 Qc5 40.Rg4–+) 39.Rg2 (39.Kf1 Qd2 40.Rg2 Qd4–+) 39...Qh4 40.Kg1 Qd4 41.Kh1 (41.Rf2 g5 42.Qb6 Qb6 43.Rb6 Bd3–+) 41...Rf3 42.Kh2 (42.Qb6 Rh3 43.Rh2 Qe4 44.Kg1 Rg3 45.Kf2 Rg5–+) 42...Qf4 (better 42...Qe3 43.Qb2 d4–+) 43.Kg1 (43.Kh1 Rf1 44.Rf1 Qf1 45.Kh2 Qf4 46.Kh1 Qh6 47.Kg1 Qc1 48.Kh2 Qf4 49.Kh1–+) 43...Qd4 (43...Qe3 44.Kh1 Rh3 45.Rh2 Qf3 46.Kg1 Rg3 47.Rg2 Qg2) 44.Kh2–+ Rf5 (better 44...Qe3 45.Qb2 d4–+) 45.Rg3 (45.Qb2 Qb2 46.Rbb2–+) 45...Rh5 (45...Qf2 46.Kh3 Rh5 47.Kg4 Qf5) 46.Kg2 Qe4 (46...Qd2 47.Kg1 Qh2 48.Kf1 Rf5 49.Rf3 Rf3 50.Ke1 Qf2 51.Kd1 Rd3 52.Kc1 Qd2) 47.Kf2 (47.Rf3 Kg5 48.Rb4 Qe2 49.Rf2 Rh2 50.Kh2 Qf2 51.Kh3 Kh6 52.Rh4 Kg7 53.Qc7 Qf3 54.Qg3 Qg3 55.Kg3–+) 47...Rh2 48.Kg1 (48.Kf1 Qe2 49.Kg1 Qf2) 48...Rh1 (48...Qh1) 49.Kf2–+ Rb1 50.Qa6 Rb2 51.Kf1 (51.Kg1 Qd4 52.Kh1 Qd1 53.Qf1 Qf1 54.Rg1 Qh3) 51…Qb1 0–1. beatmeeasy (1950) – Silverio10 (2040), lichess.org, 2020.

4.Nf3 Nf6 5.a4 Bg4 6.Qc1 e6 7.Na3 (7.b5 Bd6–/+) 7...Nbd7 (7...Bb4 8.Bf6 Qf6 9.Rb1–+) 8.Nh2 Bf5 9.c3 Be7 10.g3 a6 11.f3 (11.Nf3 c5–/+) 11...Rc8 (11...Nh5 12.g4 Bh4 13.Kd1–+) 12.d4 (12.g4 Bh7–/+) 12...c5! 13.bc5 (13.bc5 Nh5 Combination; 13.dc5 Nh5 Decoy) 13...0–0 (13...Nh5!? 14.Kf2 Qc7–/+) 14.g4=+ Bh7 (14...Ne4 15.fe4 Bh4 16.Kd1 Be4 17.Nf3=+) 15.g5= hg5 16.hg5 (16.Qg5? Ne4 17.Qg2 Bh4 18.Kd1 Nf2 19.Kd2 Nh1 20.Qh1 Nb6–+) 16...Nh5 17.Rg1 Bg6 18.f4 (18.Qd2 Rc6=) 18...b6 (18...Qa5 19.Bg2=+) 19.cb6 (19.e3 bc5 20.Ba6 Ra8+=) 19...Nb6 20.Nc2? (better 20.e3!?=) 20...Nc4 21.Ne3 Nb2 22.Qb2 Nf4 23.Nhg4 (23.Nf3 Qa5 24.Nd1 Bd6–/+) 23...Rb8 24.Qd2 Nh5 (24...Bg5!? 25.Ne5 Bh4 26.Kd1 Qb6 27.Ng6 Ng6–/+ (worse 27...fg6 28.Ng4=+)) 25.Ne5=+ Rc8 (25...Bg5 26.Ng6 fg6 27.Bh3–/+) 26.Ng6= fg6 27.Qd3 (27.Nd1 Rc6=) 27...Nf4=+ 28.Qa6?? (better 28.Qc2 e5 29.de5=+) 28...Rc3 29.Ng2 Ng2 (29...Qc7 30.Nf4 Rc1 31.Rc1 Qc1 32.Kf2 Qf4 33.Kg2 Qg5 34.Kh2 Rf2 35.Rg2 Qf4 36.Kh1 Rf1 37.Rg1 Qh4 38.Kg2 Rf2) 30.Bg2–/+ (30.Rg2 Bb4 31.e4 Ra3 32.Kd1 Ra1 33.Kc2 Rff1 34.Qe6 Kf8 35.ed5 Rac1 36.Kd3 Qc7 37.Qc8 Qc8 38.Rf2 Rf2 39.Ke3 Qf5 40.a5 Qf3) 30...Qd7 (better 30...Re3 31.Kd1 Qb8 32.Bd5 ed5–+) 31.Kd2? (better 31.Rf1!?=) 31...Rfc8 (31...Bb4 32.Kd1 Rc4 33.Bh3 Rd4 34.Kc2 Qc7 35.Kb1–+) 32.Bf3 Rc2?? (32...Bb4 33.Kd1 R8c4 34.Qa8 Kf7 35.Be4 Rd4 36.Bd3–+) 33.Kd1 (better 33.Ke3!?=+) 33...Bb4–+ 34.Rg2?? (better 34.Rf1–+) 34...Rd2 35.Ke1 Ra2 36.Kf1 (36.Kf2 Ra1 37.Rg4–+) 36...Ra1 37.Kf2 Be1 38.Ke3 Rc3 39.Kf4 e5! 40.de5 (40.de5 Qf5 Mate attack; 40.Ke5 Re3 Double attack (40...Ra4 Zwischenzug)) 40…Qf5 0–1. beatmeeasy (1900) – faisal_boentoro (1890), lichess.org, 2020.

3.a3 Qb6

4.Qc1 a5 5.ba5 Qa5 6.e3 f6 7.c4 e6 (7...e5 8.cd5 Qd5 9.Nc3=) 8.Nf3 Bd6 9.Be2 Ne7 10.0–0 e5 11.d4 e4 12.Nfd2 0–0 (12...b5 13.cb5 cb5 14.f3 ef3 15.Bf3=) 13.cd5 (13.c5 Bc7=) 13...cd5 (13...Qd5 14.Bc4 Bh2 15.Kh2+–) 14.Nb3 (14.f3 ef3 15.Rf3 Bg4–/+) 14...Qd8 (14...Qb6 15.Nc5+=) 15.Nc3 (15.Qc2 Nbc6=) 15...Bd7 (15...Qc7 16.h3+=) 16.f4 (16.Nb5 Bb5 17.Bb5 Qb6=) 16...Qb6 (16...Nbc6 17.Nc5 Qc7 18.Nb5 (18.Nd7?! Qd7 19.Rb1 Rfc8=) 18...Nd4 A) 19.Nc7?! Ne2 20.Kf2 Nc1 21.Na8 Bc5 (worse is 21...Ra8 22.Rac1 Bg4 23.Nb7 Ba3 24.Ra1+=) 22.Rfc1 Be3 23.Ke3 Nf5 24.Ke2 Bb5 25.Ke1 Ra8=; B) 19.ed4?! Bb5 20.Bb5 Ra5+–; C) 19.Bd4 Bb5 20.Bb5+–) 17.Nd2= Bc6 18.Re1 (18.Rb1 Qa7=) 18...Nd7 19.Qc2 Rfc8 20.Qb3 (better is 20.Rec1!?=) 20...Bf4–/+ 21.Bb5 Bb8 (21...Bb5 22.Nb5 Ra5 23.ef4 Rb5–+ (23...Qb5?! 24.Re4 Qb3 25.Nb3 de4 26.Na5+=)) 22.Nde4+= Kh8 23.Nf2 Qc7 24.g3 Nf8 25.Rac1 Qd7 26.a4 Ne6 27.Ba3 ½–½. Krull,Guenter – Klotzki,Wolfgang, Schleswig Holstein–chB, 1989.

4.Qc1 f6 5.Nf3 e5 6.d3 e4 7.Nd4 Nh6 8.g3 Ng4 9.c3 Nd7 10.Bg2 Nde5 11.0–0 c5 12.Nc2 d4 13.cd4 cd4 14.Nd4 f5 15.de4 fe4 16.Be4 g6 17.Nf3 Nf3 18.ef3 Rg8 19.fg4 Bg4 20.Nd2 Bg7 21.Bg7 Rg7 22.Nc4 Qd4 23.Re1 0–0–0 24.Ne3 Rc7 25.Qb1 Be6 26.Ng2 Rc3 27.b5 Rb3 28.Qc1 Kb8 29.a4 Qe4 30.Re4 Rb2 31.Qb2 Rd2 32.Qd2 Bd5 33.Qd5 1–0. giorgo – earta, playok.com, 2012.

4.c4 dc4 5.e3 (5.Qc2 a5 6.Qc4 ab4 7.Qb4 Qb4+=) 5...Qa6 (5...Be6 6.Qc2= a5 7.Bc4 Bc4+=) 6.Nf3 (6.d3 cd3 7.Bd3 Qb6=) 6...Nf6 (6...Bf5 7.Ne5 b5 8.d3=) 7.a4 (7.d3 cd3 8.Bd3 Qb6=) 7...e6+= 8.Na3 Bb4 9.Nc4 c5 10.Ng5 0–0 (10...Nbd7 11.Bf6 Nf6 12.Ne5=) 11.Bf6 (11.Qc2 e5 12.Ne5+/– (12.Be5?! Nbd7+=)) 11...gf6= 12.Nh7 Kh7 13.Bd3 f5 14.Qh5 Kg7 15.Qg5 Kh7 16.g4 Rg8?? (better is 16...Bd2 17.Kd2 Re8+–) 17.Qh5 Kg7 18.Ne5 (18.Ne5 Bd2 19.Kd1+– (19.Kd2?! Qa5 20.Ke2 Qc7+–)) 1–0. Zylla,Johannes (2225) – Kubacek,Josef, corr ICCF WSTT/3/06/2, 2006.

4.c4 Bf5 5.c5 Qc7 6.Nf3 Nd7 7.d3 (7.Nh4 Be6=) 7...e5 8.Nbd2 Be7 (8...Ngf6 9.e3=) 9.e4= Be6 10.d4 Bf6 (10...de4 11.Ne4 Bd5 12.Bd3=) 11.ed5+= cd5 (11...Bd5? 12.de5 Be7 13.Bc4+–) 12.de5 Ne5 (12...Be5? 13.Ne5 Ne5 14.f4+–) 13.Ne5 Be5 14.Bb5 Ke7 15.Be5 Qe5 16.Be2 Nf6 17.0–0 Rhc8 (17...Rhd8 18.Nf3 Qf4 19.Nd4+=) 18.Nf3 Qc7 19.Re1 Kf8 20.Qd4 h6 21.Bd3 a6 22.Nh4 (22.Re3 a5+/–) 22...Qd7 (22...Re8 23.Nf5+=) 23.Re3 Re8 24.Nf3 Ng4 25.Re2 Bf5 26.Rae1 Bd3 27.Qd3 Re2 28.Re2 Re8 29.Re8 Ke8 30.h3 Nf6 31.Nd4 Qc7 32.Nf5+/– Kf8 33.Qd4 Qc6 34.Qe4?? Ne8 35.Qe7+– Kg8 36.Qd8 Kf8 37.Nd6 g6 38.Kf1 Qa4 39.Ke1+– Qc6 40.Ke2 Qa4 41.Kd2 h5 42.Qb8 h4 43.Qe8?? Qe8= 44.Ne8 Ke8 45.Kd3 Kd7 46.Kd4 Kc6 47.g3 Kb5 48.Kd5 Ka4 49.gh4 Ka3 50.Kc4 Ka4 51.f3 f5 52.h5?? gh5–/+ 53.h4 Ka3 54.Kc3?? (better is 54.f4=) ½–½. Kilpatrick,Robert – Stevenson,Jim AB, corr SCCA cand, 1987.

4.d3 Nf6 5.Nd2 c5!? =.

4.d4 Bf5 5.c3 Nd7 6.e3 e5 (6...Ngf6 7.c4=+) 7.Bd3 (better is 7.c4!? e4 8.c5=+) 7...Bd3–/+ 8.Qd3 e4 9.Qc2 Bd6 10.Nh3 Ngf6 11.Nd2 0–0 12.c4 dc4 (12...Qd8 13.c5 Bc7 14.f3=+) 13.Nc4 (13.Ne4? Ne4 14.Qe4 Bb4 15.ab4 Qb4 16.Kd1 Qb2–+) 13...Qc7 14.Nd6 Qd6 15.Nf4 Rfe8 16.0–0 Nd5 17.Nd5 cd5 18.h3 (18.Rfc1 Qe6=) 18...Rac8=+ 19.Qe2 Rc7 20.Rac1 Rec8 21.Rc7 Rc7 22.Rc1 f5 23.Rc7 Qc7 24.f4 (24.Qb5 Qc6 25.Qa5 Nf6=) 24...g6 (24...Nf6 25.a4=+) 25.Kh2 (25.Qb5 Nb6=) 25...a6 26.g4 fg4 27.hg4 b5 28.g5 Qc4 29.Qc4 bc4 30.Bc3 (30.a4 Kf7=) 30...Nb8 (better is 30...Nb6!?–/+) 31.a4= Kf7 32.Kg3 Ke6 33.Kg4 Nc6 34.b5 ab5 35.ab5 Nd8 36.b6 Nb7 37.Bb4 Kd7 38.Kg3 (better is 38.f5=) 38...Kc6–+ 39.Bc5?? Nc5 40.dc5 c3 41.Kg4 c2 42.f5 gf5 43.Kf5 c1Q 44.g6 hg6 (45.Ke6 Qc5–+) 0–1. guinguin – Istvanny (1700), internet, 2007.

4.e3 (--> 3.e3 Qb6 4.a3).

4.Nf3 a5 5.c3 Nf6 (--> 1.b4 c6 2.Bb2 a5 3.c3 Qb6 4.a3 Nf6 5.Nf3 d5).

4.Nf3 Nf6 5.Bd4 Qc7 6.Nc3 =.

4.f4 a5 5.c3 +=.

4.f4 Bf5 5.Nf3 (5.e3 Nf6=) 5...Nf6 6.e3 Nbd7 (6...c5 7.Nc3 cb4 8.ab4=) 7.Bd3 (7.Bd4 Qd8=) 7...Be4 (7...Bd3 8.cd3 c5 9.0–0=) 8.0–0 (8.Bd4 Qd8=) 8...e6 (8...Bd3 9.cd3 a5 10.Nc3=) 9.Ne5 (better is 9.Be4 Ne4 10.Bd4=) 9...0–0–0?? (better is 9...Bd3 10.Nd3 c5=) 10.Nf7+– Rg8 (10...Bd3 11.cd3 (11.Nh8?! Bf1 12.Qf1 Be7+/–) 11...Rg8 12.Nd8 Kd8 13.Nc3+–) 11.Nd8 Kd8 12.Nc3 Bd6 13.Be4 de4 14.Ne2 e5 15.fe5 Ne5 16.Bd4 Qc7 17.Be5 Be5 18.Nf4 Qd6 19.Rb1 g5 20.Nh5 Bh2 21.Kh1 Be5 22.Nf6 Bf6 +–. pokes – ozewiezewoze, net–chess.com, 2003.

4.d3 a5

5.c3 e6 6.Nd2 Nf6 7.g3 Nbd7 8.Bg2 Be7 9.Ngf3 0–0 10.0–0 c5 11.Re1 cb4 12.cb4 ab4 13.ab4 Ra1 14.Ba1 Bb4 15.Ne5 Qd6 16.Nd7 Nd7 17.Rf1 b6 18.e4 Bb7 19.f3 Ne5 20.Bd4 Nd3 21.Qb3 de4 22.Bg7 Kg7 23.Ne4 Qd4 24.Nf2 Nf2 25.Rf2 Bc5 26.Qb2 Qb2 27.h4 Qf2 28.Kh2 Qg1 29.Kh3 Rd8 30.g4 Rd2 31.Kg3 Rg2 32.Kf4 Bd6 33.Kg5 Qe3 34.f4 Qf4 35.Kh5 Qg4 0–1. golfx – dajmo, kurnik, 2012. (=1.a3 c6 2.b4 d5 3.Bb2 Qb6)

5.Nd2 +=.

4.Nf3 c5

5.Nc3+/ – Qd6 6.e4+– e6 7.ed5 ed5 8.Qe2 (8.Nb5 Qe7 9.Qe2 Qe2 10.Be2 Na6+–) 8...Be6 (8...Kd8 9.Nb5 Qe6 10.bc5 Qe2 11.Be2+–) 9.bc5 (9.Nb5!? Qd7 10.Qe5+–) 9...Qc5 '+/–' 10.Ng5 Qe7 11.Ne6 fe6 12.Qh5 (12.0–0–0 Nc6+/–) 12...Qf7 13.Be2 (13.Qh3!? Nf6 14.Bb5 Nbd7 15.0–0+=) 13...Nf6 14.Qf7 (14.Qh3 Nc6+=) 14...Kf7 15.d4 Nc6 16.Rd1 (16.Nd1 Rc8=) 16...Rc8 17.f4 (17.0–0 h5=) 17...Na5 '=/+' 18.Rf1 (18.Ra1!?+=) 18...Nc4 '–/+' 19.Bc4 Rc4 (19...dc4?! 20.Ke2=) 20.Rd3 g6 (20...Bd6 21.Rff3–/+) 21.Kd1 Be7 22.Kc1 Rhc8 23.Kb1 a6 24.Ka2 b5 25.Re1 Bd8 26.g3 Ba5 '–+' 27.Kb3 Ne8 28.g4 b4 '–+' 29.ab4 Rb4 30.Ka2 Rcb8 31.Rb1 Nf6 32.f5 gf5 '–+' 33.gf5 ef5 34.Rf3 Ke6 35.Ba3 Rb1 36.Nb1 Bb6 37.Bb2 Bc7 38.Re3 Kf7 39.h3 Ne4 40.Nc3 f4 41.Rd3 Ke6 42.Rf3 Bd6 43.Ne2 Ng5 44.Rf4 Bf4 45.Nf4 Kd6–+ 0–1. Buczinski,Henryk (2095) – Jedrzejowski,M (2145), I Liga Makroregionalna Poland, 1993.

5.Nc3 e6 6.Na4 Qb5 7.Nc5 a5 8.e3 Qb6 9.Bd4 Qd8 10.Bb5 Nc6 11.Ne5 Bc5? (better is 11...Qc7+–) 12.Nc6 (12.Bc5?! Bd7 13.Nd7 Qd7+–; 12.bc5?! Nge7 13.Qg4 f6 14.Qg7 Rf8+–) 12...bc6 13.Bc6 Bd7 14.Bd7 (14.Bd7 Kd7 15.Bg7+–; worse is 14.Bc5 Bc6 15.0–0 Nf6–/+) 1–0. Pott,Brian (1870) – Vermaas,Fred, IECG, 2006.

5.Nc3 e6 6.Na4 Qb5 7.Nc5 Qb6 8.e3 f6 9.Na4 Qd8 10.c4 b6 11.cd5 Qd5 12.Nc3 Qd8 13.Nh4 Ne7 (13...Qe7 14.Qh5 Qf7 15.Ng6+–) 14.Qh5 g6 15.Qf3 Nec6 1–0. Korchut,Adam (2090) – Vermaas,Fred, IECG, 2006.

5.Nc3+/– e6 6.Na4 Qb5 7.Nc5+– a5 8.e4 Qb6 9.Na4 Qc6? (better is 9...Qc7 10.ed5 Nf6 11.de6 Be6 12.Bb5 Nc6+–) 10.Nd4 Qd6 11.Nb5 Qf4 (11...Qd8 12.Bd4 Na6 13.Nb6+–) 12.Nb6 ab4 (12...Ra6 13.Nc8 Rc6 14.ed5 Qe4 15.Be2 Rc8 16.de6 Rc2+–) 13.Na8 Qe4 14.Be2 (14...Qg2 15.Bf3+–) 1–0. Johansson,Mats (2285) – Vermaas,Fred, IECG, 2006.

4.Nf3 Bf5

5.d3 Nd7 6.e4 de4+= 7.de4 (7.Nh4 e6 8.Nf5 ef5 9.Nc3 Ngf6) 7...Be4 8.Nbd2 Bf5 9.Bd3 (9.Bc4 Ngf6+= (9...e6+=); 9.Nc4 Qc7) 9...Bd3 10.cd3 Ngf6 11.0–0 e6 12.Ne5 (12.Ne4 Be7–/+) 12...Ne5–/+ 13.Be5 Qb5 14.Nc4 Qd5 15.Qc1 (15.Bf6 gf6 16.Ne3 Qd4–/+) 15...Be7 16.Rd1 0–0 17.Qg5 Rad8 18.Rac1 Rd7 19.d4 Qe4 20.Ne3 Qg6 21.Qg6 hg6 22.Re1 Rfd8 23.Rc3 (23.Kf1 Ne8–/+) 23...Ne8 24.Nc2 Nc7 25.Bc7 Rc7 26.a4 Bf6 27.Rc4 Rcd7 28.b5 (28.Re4 Rd6–+) 28...cb5 29.ab5 Bd4 30.Nd4 Rd4 31.Rd4 Rd4 32.Ra1 Rd6 (32...a6 33.ba6 ba6 34.h4–+) 33.h4 a6 34.ba6 ba6 35.f4 Kf8 36.Kf2 –+. Bertel,Michael (1765) – Popstein,Sheila, intermet, 2004.

5.Bd4 Qc7 +=.

5.e3 a5 6.Bd4+= Qc7 7.b5 (7...Nd7 8.bc6 bc6 9.Nh4=). Lielmezs,Girts – Popstein,Sheila, TE–2004–P–01711, 2004.

5.e3 Nd7 6.Be2 Ngf6 7.0–0 e6 8.Nh4 Bg6 9.f4 Qc7 10.d3 (10.g4 0–0–0=) 10...Qb6 11.Bd4 c5 12.bc5 Bc5 13.c3 (< 13.Ng6 Bd4 (13...hg6?! 14.c3=+) 14.ed4 Qd4 15.Kh1 hg6–+ (< 15...fg6 16.c3 Qb6 17.Nd2–/+)) 13...Qd6 14.Nd2 0–0 15.Ng6 hg6 16.a4 Rfc8 17.Nf3 Bd4 18.cd4 Rc7 19.Qd2. Johansson,Mats – Popstein,Sheila, IECG, 2004.

5.e3 Nf6 6.Bd4 Qc7 7.Nc3 +=.

4.Nf3 Bg4

5.Ne5 Bf5 6.e3 +=.

5.Ne5 Nf6 6.Ng4+= Ng4 7.e3 Nh6 (7...Nf6 8.Bf6 (8.c4 Nbd7 9.Be2 dc4 10.Bc4 a5) 8...ef6 9.d4+= a5 10.b5 Bd6) 8.c4 Nd7 (8...e6 9.c5 Qc7 (9...Qd8 10.Be2 b6) 10.Qh5= (10.Be2 b6) 10...b6) 9.Nc3 (9.cd5 cd5 10.Nc3 e6) 9...e6 10.Be2 (10.cd5 ed5 11.Be2 a5+=) 10...f6 (10...dc4 11.Bc4 Nf5 12.0–0+=) 11.0–0+/– Nf7 12.d4 Be7 13.Bg4 (13.f4 f5+/–) 13...f5+= 14.cd5 (14.Be2 0–0+=) 14...cd5 (14...fg4? 15.de6 Nf6 16.ef7 Kf7 17.e4+–) 15.Bh5 g6 (15...0–0 16.Rc1+=) 16.Be2 Nf6 17.Na4 Qd6 18.Nc5 b6 19.Qa4 Kf8 20.Nd3 Kg7 21.Rac1 Rhc8 22.Rc8 Rc8 23.Qa7 Rc2 24.Bd1 (24.Re1 Ne4+/–) 24...Rd2 25.Qa4?? (better is 25.Qa6 Qc7 26.Bb3+/–) 25...Rd3–/+ 26.Qc2 Rd1 27.Rd1 Ng4 28.h3? Qh2 29.Kf1 Nf6 30.f3 Nh5 31.f4 Ng3 32.Ke1 Ne4 33.Rc1 Bh4 34.Ke2 Qg2 35.Kd3 Bf2 36.Ra1 Nfd6 37.h4 Nc4 38.Bc1 Qg3 39.Qe2 Be1 40.h5 Nf2 41.Kc2 Ng4 42.hg6 hg6 43.Kb1 Nge3 44.Ra2 Ng4 45.Qe6 Qd3 46.Rc2 Bh4 47.Qe2 Qb3 48.Ka1 Bf6 49.Bb2 Nb2 50.Rc7 Kh6 51.Qg2 Qa3 52.Kb1 Qd3 53.Ka2 Bh4 54.Qh1 Qg3 55.Kb2 Nf2 56.Qd5 Nd3 57.Ka3 Nc5 58.Ka2 Qf2 59.Ka3 Qe3 60.Ka2 Qd2 61.Ka3 Qc1 62.Ka2 Qc2 63.Ka3 Qa4 64.Kb2 Qb4 65.Kc2 Qa4 66.Kc1 Qd4! (66...Qd4 67.Qd4 Nb3 68.Kb2 Nd4–+) 0–1. Woelfelschneider,Peter – Steeger,Horst, Telefonpartie, 1982.

5.Ne5 Bh5 6.Nc3 (6.g4 f6=) 6...f6 7.Nd3 (7.Nf3 e5=) 7...e5 8.Na4 Qc7 9.g3 (9.Nac5 Bf7=) 9...b6 10.Bg2 Bd6 11.0–0 Ne7 12.f4 e4 13.Nf2 (13.Ndc5 Bg4+=) 13...a5 14.Bd4 Ra6 (14...Nd7!?+=) 15.Nc5= bc5 16.bc5 Bf4 17.gf4 Ng6 (17...Nf5 18.c3+=) 18.Nh3 (18.f5 Nf4 19.Re1 Qd7–/+) 18...Nh4 19.Qe1 (19.Rb1 Ng2 20.Kg2 0–0+=) 19...Ng2+= 20.Kg2 Bg4 21.Rb1 Ra8 22.f5 (22.Qf2 0–0=) 22...Na6 (22...0–0 23.Nf4 Qd7 24.Ne6+=) 23.Ng1= Qd7 24.Qf2 0–0 25.Qf4 Bh5 26.Rb3 Qe7 27.Rh3 Bf7 28.Qh4 h6 29.Be3 h5 30.Rg3 Kh7 31.Nh3 Nc5 32.Rg1 (32.Rg1 Nd7 33.Kh1+/–) 1–0. Zimmermann,Joerg (1655) – Tschoepe,Frank (1700), TT–09.27 ETC, 2003.

3.a3 Nd7

4.e3 b5 5.Nf3 e6 6.Be2 f5 (6...Ngf6!?=) 7.0–0 Ngf6 8.Ne5 (8.a4 ba4 9.Nd4 Nb8 10.Ra4 Bd6+=) 8...Ne5= 9.Be5 Be7 10.d3 (10.a4 Bb4 11.ab5 cb5 12.Bb5 Bd7+=) 10...0–0 11.Nd2 Ng4 (better is 11...a5!?=) 12.Bg4+/– fg4 13.Qg4 g6 14.Qe2 Bf6 15.Bf6 Qf6 16.Nf3 (16.Nb3 e5+/–) 16...Bd7 (16...e5 17.Nd2+=) 17.c4 (17.d4 a5+–) 17...a6 (17...e5 18.cd5 cd5 19.Qb2+/–) 18.cd5 ed5 19.Nd4 h5 20.Rac1 Bg4 (20...a5 21.Rc5+–) 21.f3 Bd7 22.Rc5 Rae8 23.Rfc1?? (23.Qf2 h4+–) 23...Qg5?? (better is 23...Qd4! 24.Re1 Qf6–+) 24.Nc6 Bc6 25.Rc6+– Re3 26.Rg6! Qg6 27.Qe3 Qg7? 28.Rc5 Qa1 29.Kf2 Qa3?? 30.Qg5 Kf7 31.Rc7 Ke8 32.Qe7 1–0. Fournier,Frederic – HawaiianBryan, Active (5/0), 2005.

4.e3 Ngf6 5.c4 e5 6.cd5 cd5 7.Qb3 Bd6 8.Nc3 Nb6 9.Nf3 Be6 (9...a6 10.Rc1=+) 10.Bb5= Nbd7 11.Na4 (11.Ng5 a6 12.Be2 Qe7=) 11...0–0 12.0–0 a6 (12...Rc8 13.Rac1=+) 13.Bd7= Nd7 (worse 13...Qd7 14.Nb6 Qb5 15.Na8+–) 14.Rac1 b5 (14...d4 15.Qd1=+) 15.Nc5= Nc5 16.bc5 Bc7 (better 16...e4 17.Nd4 Bc7=) 17.Be5+– (worse 17.Ne5 d4 18.Qc2 Be5–+) 17...Be5 18.Ne5 d4 19.Qb2 d3 20.Nc6 (20.Qd4 Qc7+–) 20...Qd7 21.Nd4 Bc4 22.a4! Rab8 (22...ba4 23.Rc4 Deflection) 23.Qc3 Rfc8 24.c6 Qd5 25.h3 Ra8 26.f4 Rd8 27.f5 f6 28.Rf4 Qe5 29.c7! Rdc8 (29...Qc7 30.Ne6 Double attack (30.Ne6 Decoy)) 30.ab5 (better 30.Ne6 Bd5 31.a5+–) 30...Rc7?? (better 30...ab5!? 31.Ne6! Qc3 32.Rc3 Kf7+–) 31.ba6 (31.b6 Rc5+–) 31...Ra6?? (better 31...Rac8 32.Qa3 Qe8+–) 32.Qb4 (better 32.Ne6 Qc3 33.Rc3 g5 34.Rfc4 Rc4 35.Rc4 Ra2+–) 32...Ra8 (32...Qc5 33.Qc5 Rc5+–) 33.Rc4 Ra1 (33...Rca7 34.Qb3 Kh8 35.Qd3 Ra1 36.Rf1+–) 34.Kf2 h6 1–0. Williams,Barry – Bell,David, NZL A Reserve, 2000.

4.Nf3 b6 5.e3 Ngf6 6.Be2 e6 7.0–0 Be7 8.c4 0–0 9.cd5 cd5 10.d4 g6 (10...a5!?=) 11.Nbd2 Kg7 12.Bd3 h6 13.Qc2 Rh8 14.Rac1 Qf8 15.Rfe1 (15.Ne5 Qg8+/–) 15...Bb7 16.e4 (16.Ne5!?+/–) 16...de4= 17.Ne4 Ne4 (17...a5!?=) 18.Be4+= Be4 19.Re4 (19.Qe4 Bf6+/–) 19...Bf6 (19...Nf6 20.d5 ed5 21.Re3+=) 20.Ree1 Rd8 (20...Qd6 21.Ne5+=) 21.Ne5 Ne5 22.de5 Be7 23.Rcd1 Rd1 24.Rd1 f6?? 25.ef6+– Bf6 26.Bf6 Qf6?? 27.Qd2 Rf8+= 28.h3 g5 29.Qd4 Qd4= 30.Rd4 Kg6 31.Kh2 Rf6 32.Rd2 h5 33.Rb2 Rf5 34.a4 g4 35.hg4+= hg4 36.g3 Kg5 37.Kg2 Rf2?? 38.Rf2+– a5 39.b5 (39.b5 Kg6 40.Rc2+–) 1–0. Fournier,Frederic (2060) – Chicot,Patricia (1625), Active Blind, 2007.

4.Nf3 e6 5.d3 Ngf6 6.Ne5 Be7 7.Nd2 0–0 8.Ndf3 Bd6 9.Ng4?? Ng4–+ 10.h3 Ngf6 11.e4 Qe7 12.e5 Bb4! 13.c3 Bc3! 14.Bc3 Ne8 15.Bd2 Nc7 16.d4–/+ c5 17.Bd3 cd4 18.Bh7 Kh7–/+ 19.Ng5 Kg6 20.Qg4? Ne5 21.Qg3 Nc4?? 22.h4?? Nd2–+ 23.h5 Kh6 24.Kd2 Qg5 25.Qg5 Kg5 26.Raf1 Rh8 27.f4 Kf6 28.g4 Bd7 29.g5 Ke7 30.h6 gh6 31.gh6 Rh7 32.Rfg1 Rah8 33.Rg7 Rg7 34.hg7 Rg8 35.Rh7 Ne8 36.Kd3 Rg7 37.Rh8 Rg3 38.Kd4 Ra3 39.f5 Ra4 40.Ke5 b5 41.Rh4 Rh4 42.f6= Kf8 ½–½. Nautiluschess – ghosty, ICS blitz, 2001.

4.Nf3 Ngf6 5.e3 e6 6.Be2 Bd6 7.0–0 0–0 8.c4 dc4 9.Bc4 b5 10.Bb3 c5 11.bc5 Nc5=+ 12.d4 Nb3 13.Qb3 Bb7 14.Nbd2 Ne4 15.Qd3 Nd2–/+ 16.Nd2 a6 17.e4 Bf4 18.f3 f5 19.Nb3 Qh4 20.h3? Qg3 21.Qe2 fe4 (22.fe4 Qh2 23.Kf2 Bd2 24.Qf3 Rf3 25.Kf3 Rf8 26.Ke2 Qg2 27.Rf2 Rf2 28.Kd1 Qf3 29.Kc2 Be4#) 0–1. Christobal (1610) – Mario Cruz (1860), internet, 2005.

4.e3 e5

5.c4 Ne7 6.cd5 cd5 7.Be2 g6 8.Nf3 Bg7 9.0–0 0–0 10.d4 e4 11.Ne5 Nc6 12.Nc6+= bc6 13.Nd2 Rb8 14.f3 f5 15.Rb1 Qg5 16.f4 Qh4 17.g3 Qe7 18.Nb3 Qd6 19.Nc5 Nc5 20.bc5 Qc7 21.a4 Bf6 22.Bc3 Bd8 23.Rb8 Qb8 24.a5 Rf7 25.a6 Qc7 26.Qb1 Qe7 27.Qb8 Qc7 28.Qc7 Bc7 29.Rb1 Kg7 30.Kg2 h5 31.h4 Kf6 32.Ra1 Rh7 33.Ba5+/– Ba5 34.Ra5 Rc7 35.Ra1 Ke7 36.Rb1 Kd7 37.Ra1 Kd8 38.Bd1 Kd7 39.Ba4?? Kd8?? 40.Bb3 Kd7 41.Ba4?? Kd8?? 42.Bb3 Kd7 ½–½. Guest286065 – bernikov (1690), internet, 2003.

5.Nf3 f6 6.d4 e4 7.Nfd2 Bd6 8.c4 Ne7 9.Nc3 0–0 (9...f5!?=) 10.Qb3 dc4?? (10...f5 11.cd5 cd5 12.Nd5+–) 11.Bc4 (11.Nc4 Bb4 12.Nb6 Kh8 13.Na8+– (13.Qb4?! Nb6 14.Ne4 Bf5=)) 11...Kh8+– 12.Nce4 Bc7 13.h4 (13.0–0 Nb6+–) 13...Nb6 14.Bd3 Nbd5 15.h5 f5 16.Ng5 h6 17.Ngf3 f4 (17...Be6!?+–) 18.e4 Ne3?? (better 18...Nf6+–) 19.fe3+– fe3 20.Nc4 Rf3 (20...Bf4 21.Qc3+–) 21.gf3 Bg3 (21...Be6 22.Qc3 Qf8 23.Ke2+–) 22.Ke2 Bf2 (22...Be6 23.Rhg1 Qc7 24.Qc3+–) 23.Ne3 c5 (23...Be3 24.Ke3 Qe8+–) 24.dc5 Be3 25.Ke3 Nc6 (25...Qe8+–) 26.Rag1 Qe7 27.Rg7 Be6 (27...Qg7 28.Bg7 Kg7 29.Rg1 Bg4 30.Rg4 Kf8 31.Qg8 Ke7 32.Rg7 Kf6 33.Qf7 Ke5 34.f4) 28.Re7 (28.Re7 Nd4 29.Bd4 Kg8 30.Qe6 Kf8 31.Bg7) 1–0. FeegLood (2740) – knightfactor (2080), lichess.org, 2015.

5.Nf3 f6 6.d4 e4 7.Nfd2 Bd6 8.c4 Ne7 9.Nc3 Bc7? (better 9...f5!?=) 10.cd5+– cd5 (10...f5 11.dc6 Nc6 12.Qh5 g6 13.Qh6+–) 11.Nd5!+– Nd5 12.Qh5 g6 13.Qd5 Nb6 (13...f5+–) 14.Qe4 Qe7 (14...Kf7 15.Rc1+–) 15.Qe7 Ke7 16.a4 Nd5 17.Ba3 Bd6 18.Rb1 (18.b5!? Ba3 19.Ra3 Rd8+–) 18...Nc3 (18...a5!?+–) 19.Rb3 White plans b5 19...Na4 20.Ne4 (20.b5 Nb6+–) 20...Nb6 (20...Be6!? 21.Rb1 Rhc8+–) 21.Nd6+– Kd6 22.b5 Kc7 23.e4 Be6 (23...Re8 24.Bd3+–) 24.d5 Bf7 25.Rc3 Kd7 26.Bd3 Rac8 27.Kd2 Rc3 28.Kc3 Na4 (28...f5 29.f3+–) 29.Kd4 Rc8 (29...g5 30.h4 g4 31.Ra1+–) 30.Rc1 (30.Ra1!? Ra8+–) 30...Rc1 31.Bc1 Nb6 32.Bb2 Na4 33.Ba1 Nb6 34.Kc5 Kc7 35.f4 White prepares e5 35...Nd7 36.Kd4 Kd6 (36...Nb6 37.g4+–) 37.Bb2 Ke7 (37...Nb6 38.e5 fe5 39.fe5 Kd7 40.Be4+–) 38.Ba3 Ke8 39.e5 fe5 40.fe5 Bg8 41.e6 Nb6 42.Ke5 Na4 (42...Nd7 43.ed7 Kd7+–) 43.d6 (43.d6 Kd8 44.Be4+–) 1–0. FeegLood (2615) – knightfactor (2240), lichess.org, 2015.

5.Nf3 Ngf6 6.Ne5+= Ne5 7.Be5 Bd6 8.Bb2 0–0 9.c4 Be6 (9...dc4 10.Bc4 Be6 11.Qb3+=) 10.cd5 (10.c5 Be7+=) 10...Bd5 (10...Nd5 11.Nc3=) 11.d3 Be6 12.Be2 Rc8 13.0–0 c5 14.b5 c4 15.f4 (15.dc4!? Bc4 16.Bc4 Rc4 17.Bd4+/–) 15...cd3 16.Bd3 Bc4 (better is 16...Bc5 17.f5 Bd5+=) 17.e4?? (17.Bc4!? Rc4 18.Nd2+/–) 17...Be7 (better is 17...Bd3 18.Bf6 Qf6 19.Qd3 Bc5 (19...Qa1?! 20.Qd6 Qb2 21.Qb4 Qb4 22.ab4–+) 20.Kh1 Qa1–+) 18.Bc4+= Rc4 19.e5?? (better is 19.Nd2 Rc8 20.Bf6 Bf6 21.e5+=) 19...Bc5–+ 20.Kh1 Ne4 (better is 20...Qd1!? 21.Rd1 Ne4–+) 21.Qf3+= Nf2?? (better is 21...Qh4+=) 22.Rf2+/– Bf2 23.Qf2 Qd1 24.Qg1 Qg1 (better is 24...Qc2!? 25.Bc3 Rd8=) 25.Kg1+/– Rf4 (25...Rc2 26.Bc3 Rc1 27.Kf2 Rd8=) 26.Nd2+– Rd8 27.Nf3 Rc4 28.Rf1 h6 29.Re1 Rc2 30.Bd4 Ra2 31.Ba7 Ra3 32.Bc5 Ra2 33.b6 Rc2 34.Bd6 Rb2 35.h3 Rb6?? (better is 35...Ra8 36.Bc5 Raa2+/–) 36.Bc7+– 1–0. Frank,Detlev (1810) – Kloppenburg,Reimer, Pinneberg–ch, 2007. (=1.a3 d5 2.b4 c6 3.Bb2 Nd7 4.e3 e5)

5.Nf3 Bd6

6.d4 e4 7.Nfd2 Qe7 8.c4 f5 9.Nc3 Ngf6 10.Qb3 0–0 (better 10...Qe6!?=) 11.cd5+– Kh8 (11...Nb6 12.dc6 Be6 13.Qc2 bc6 14.Ba6+–) 12.dc6 bc6 13.h4 (13.Qa4!?+–) 13...f4 14.0–0–0 (14.Nc4!?+=) 14...fe3 15.fe3 Ng4 (better 15...Nb6=) 16.Nce4+– Bc7 17.Bd3 (17.Qc3 a5 18.b5 Nb6+–) 17...a5 (17...Ne3 18.Rde1 Ng2 19.Reg1=+) 18.Ng5 (18.Rhe1!?+–) 18...ab4 19.ab4 Rb8 (19...Ndf6!? 20.Bc4 Nf2 (worse 20...Qe3 21.Nf7 Rf7 22.Bf7+–) 21.Nf7 Rf7 22.Bf7 Nd1 23.Rd1 Bd6=) 20.Nh7 Rb4? (20...Rf2 21.Ne4 Rb4 22.Ba3+=) 21.Qa3?? (better 21.Nf8!? Qf8 22.Qc3 Ne3+–) 21...Bd6? (better 21...Rd8!? 22.Bc3 Nf2 23.Bb4 Qb4+–) 22.Nf8+– Rc4?? (better 22...Nf8 23.Qc3 Nf2+–) 23.Nc4 Ba3 24.Ba3 (better 24.Ng6 Kg8 25.Ne7 Be7 26.Rdf1+–) 24...Qe3 (24...Qd8 25.Nd7 Qd7+–) 25.Ne3 Ne3 26.Ng6 (26.Ng6 Kh7 27.Rde1+–) 1–0. FeegLood (2760) – Alicia75 (2300), lichess.org, 2015.

6.d4 e4 7.Nfd2 f5 8.c4 f4 (better 8...Ne7=) 9.Nc3?? (9.cd5 fe3 10.Ne4 ef2 11.Nf2 (worse 11.Kf2 Qh4 12.Ke3 Bf4 13.Kd3 cd5–/+) 11...Qe7 12.Be2 cd5 13.0–0+=) 9...fe3–+ 10.fe3 Qh4 11.g3 Bg3! 12.hg3 Qg3 (12...Qh1?! 13.cd5 Ngf6 14.dc6 bc6 15.Qc2=+) 13.Ke2 Ne5! 14.Nde4 (14.de5 Bg4 Decoy) 14...de4 15.Qe1?? (15.Kd2 Qf2 16.Kc1 Qe3 17.Qd2 Nd3 18.Bd3 Qd3 19.Re1–/+) 15...Bg4 16.Kd2 Nf3 17.Kc2 Ne1 18.Kb3 Qe3 (better 18...Bf3 19.Ne2 Qf2 20.Bc3 Bh1 21.Re1–+) 19.Bc1 Qd4 (19...Bd1 20.Kb2 Qf2 21.Be2 Be2 22.Ne4 Nd3 23.Kc2–+) 20.Rh4 Bd1 (better 20...Qf2 21.Bb2 Qh4 22.Ne4 Bd1 23.Rd1 Qe4 24.Rd2 Qf3 25.Bc3–+) 21.Nd1 Qd1 (21...Qa1 22.Re4 Ne7 23.Re1 Qc1 24.Bd3–+) 22.Ka2 Qc2 (better 22...Nf6 23.Bb2 Qd2 24.Rc1–+) 23.Bb2 Nd3 (better 23...Nf3!? 24.Rc1 Qb2 25.Kb2 Nh4 26.Be2–+) 24.Re4 Kf8 25.Be2 Qb2 0–1. FeegLood (2810) – singapu85 (2665), lichess.org, 2017.

6.d4 e4 7.Nfd2 f5 8.c4 Ngf6 9.Nc3 0–0 (9...Qe7!?=) 10.Qb3+= Kh8 11.cd5 cd5 12.Nd5 Nd5 13.Qd5 Nf6 14.Qb3 f4 15.Be2 fe3 16.fe3 Qe8 17.d5 (17.Nc4!? Bc7 18.0–0+=) 17...Qg6= 18.0–0–0 (18.g3 Bg4 19.Bc4 Bh5=) 18...Bd7 (18...Bg4 19.Rde1=+) 19.Kb1 (19.Nc4 Rac8 20.Kb1 Bb8=) 19...b5 (19...Qg2 20.Rhe1–/+) 20.g4 a5 (worse 20...Ng4 21.Bg4 Bg4 22.Rdg1+–; worse 20...Bg4 21.Rdg1 Be2 22.Rg6 Bd3 23.Ka1 hg6 24.Bc3+=) 21.h4 ab4 (21...Ng4 22.h5 Qg5 A) 23.Ne4 Bf5 24.Bd3 Be4 25.Be4 A1) 25...Ne3 26.h6 Kg8 27.Bh7 Kh7 28.hg7 Kg6 29.gf8R Rf8 30.Qd3 Qf5 31.Rdg1 Kf7 32.Rf1 (32.ba5 Qd3 33.Ka2 Qd5 34.Kb1 Qb3 35.Rf1 Nf1 36.Rf1 Ke6 37.Rf8 Bf8 38.Ka1 Ba3 39.Bg7 Qd1 40.Ka2 b4 41.a6 Qc2 42.Ka1 b3 43.a7 Qd1) 32...Qf1 33.Rf1 Nf1 34.Qf5 Ke8 35.Qe6 Kd8 36.Qd6 Kc8 37.Be5 Nd2 38.Kc2 Rf7 39.Qb8 Kd7 40.Qc7 Ke8 41.Qc8 Ke7 42.d6; A2) 25...Qe3?? 26.Qe3 Ne3 27.Rdg1+–; A3) 25...Rfe8=; B) 23.Rdg1+–; 21...Bg4?! 22.Rhg1 h5 23.Bf6 Rf6 24.Bg4 hg4 25.h5=) 22.ab4 Ra4 (worse 22...Ng4 23.h5 Qg5 A) 24.Ne4?! Bf5 25.Bd3 Be4 26.Be4 Rfe8=+ (26...Ne3 27.h6 Kg8 28.Bh7 Kf7 29.Rdg1+–); B) 24.Rdg1+–) 23.Bc3 Rfa8 24.h5 Qe8 (24...Qg5!? 25.Rhe1 Be5–+) 25.h6 Be5 (25...Kg8 26.hg7 Ra3 27.Bf6 Rb3 28.Nb3=+) 26.hg7 Kg7 27.g5 Ng4?? (27...Nd5 28.Qd5 Bc3 29.Nb3–+) 28.Ne4 (28.Qb2 Ra1 29.Qa1 Ra1 30.Ba1 Ba1 31.Ka1 Ne3 32.Rc1–+) 28...Ra1?? (better 28...Bf5 29.Bd3 Bc3 30.Qc3 Qe5 31.Qe5 Ne5–+) 29.Ba1+– Ra1 30.Kc2 Ne3 31.Qe3 Qc8 (31...Ra2 32.Kc1 Qa8 33.Rh7 Kh7=) 32.Nc5 Bf5 (32...Ra2 33.Kc1 Qc7 34.Qe4+–) 33.Bd3 (better 33.Kb3 Ra3 34.Ka3 Qa8 35.Kb3 Bc2 36.Kc2 Qa2 37.Kd3 Qd5 38.Kc2 Qa2 39.Kd3 Qd5 40.Kc2 Qa2 41.Kd3 Qd5=) 33...Ra2 34.Kc1 Bb2 (34...Ra1 35.Kd2 Ra2 36.Ke1 Bc3 37.Kf1 Bd3 38.Nd3 Qf5 39.Nf4 Be5+–) 35.Kb1 Bd3 36.Rd3 (better 36.Qd3 Qg8 37.Ka2 Kh8 38.Kb2 Qg7 39.Kb3 h6 40.Rh6 Kg8 41.Ne6 Kf7 42.Rf1 Ke8 43.Ng7 Ke7 44.Qe2 Kd7 45.Rf7 Kd8 46.Rh8) 36...Qa8 (36...Ra1 37.Kb2 Rh1 38.Qe5 Kg8+–) 37.Qe7 Kg6 (37...Kg8 38.Qh7 Kf8 39.Rf1 Bf6 40.Rf6 Ke8 41.Qd7) 38.Qh7 Kg5 39.Qh6 (39.Qh6 Kg4 40.Qh5 Kf4 41.Rh4; 39.Rh5 Kf6 40.Rf5) 1–0. FeegLood (2495) – chessBS_at_Twitch (2335), lichess.org, 2015.

6.d4 Ngf6?? 7.de5+– (7.Ne5?! Qc7=) 7...Ne4 (7...Ne5 8.Be5 Be5 9.Ne5+–) 8.ed6 Nd6 (8...Ndf6 9.Nbd2 Nd6 10.Be2+–) 9.Bg7 Rg8 10.Bb2 f6 11.Nbd2 Qe7 12.Rg1 Ne5 13.Ne5 fe5 14.Qh5 Kd8 (14...Nf7 15.Qh7 Rh8 16.Qg7+–) 15.Qe5 Qd7 (15...Be6 16.Bd3 Bf5 17.Bf5 Qe5 18.Be5 Nf5 19.c4+–) 16.Qf6 Kc7 17.Be5 (17.Be5 Rg6 18.Qh4+–) 1–0. FeegLood (2375) – Luminosity (1895), lichess.org, 2015.

6.Be2 Ne7 7.0–0 0–0 8.h3 Ng6 9.d3 f5 10.Nbd2 e4 11.de4 fe4=+ 12.Nd4 Nde5 13.c4 Qh4 14.cd5= cd5 15.Qb3 Bb8? 16.Qd5+– Kh8 17.Qe4 Qh6 18.N2f3 Nf3 19.Nf3 Bd7?? 20.Qd4 Bc6 21.Rac1 Bc7? 22.Rfd1 Bb6 23.Qc3 Rac8 24.Bc4 Bf3 25.gf3?? Nh4 26.Kh2?? Nf3–/+ 27.Kg3?? Qg5# (27...Qg6#) 0–1. Onkel_Luis – joejan (1630), ICC, 2003.

3.a3 Bf5

4.d3 e6 5.Nf3 Nf6 6.e3 Be7 7.Be2 0–0 8.Nbd2 Nbd7 9.0–0 h6 10.c4 c5 11.bc5 Bc5 (11...Nc5 12.Bf6 Bf6 13.d4=) 12.cd5+= ed5 (12...Nd5? 13.e4+–) 13.Nb3 Bd6 14.Nbd4 Bh7 15.Nb5 Bc5 16.d4 Bb6 17.Bd3 Ne4 18.Nc3 Ndf6 19.Rc1 Rc8 20.Qe2 Ba5 21.Nb5 a6 22.Rc8 Qc8 23.Rc1 Qd7 24.Nc3 Rd8 25.Ne5 Qd6 26.f3 (26.Ne4 Be4 27.Qd1 Re8=) 26...Ng5 (better is 26...Nc3!? 27.Bh7 Nh7 28.Bc3 Qa3+=) 27.Bh7+= Ngh7 28.Qc2 Ng5= 29.Qa4 Qb6 30.Rb1?? Bc3–+ 31.Qc2 Bb2 32.Rb2 Qd6 33.Nd3 b5 34.Nc5 Rc8 35.Qd1 Qb6 36.Rc2 Rc7 37.Qc1 Qd6 38.Qd2 Ne6 39.Ne6 fe6 40.Rc7 Qc7 41.Kf2 Qc4 42.Qb2 Kf7 43.g3 a5 44.Kg2 b4 45.ab4 Qb4 46.Qc2 a4 47.Qc7 Kg6 48.Qc8 Qe7 49.Qc6? Qe8 50.Qa6 Kh7 51.Kh3 g6 52.g4 Qf7 53.Kg3 0–1. Fournier,Frederic (1870) – sarita (1770), Active, 2007.

4.d3 Nf6 5.f3 Nbd7 6.e4 Bg6 7.Be2 e5 8.ed5 (8.d4 ed4 9.ed5 c5+=) 8...cd5 (8...Nd5 9.Qd2–/+) 9.Nd2 Rc8 10.c4 d4 (10...Bd6 11.Qa4+=) 11.c5 (better is 11.f4!?=) 11...b6 12.Rc1 (12.cb6!? ab6 13.Qa4–/+) 12...bc5–+ 13.bc5 Bc5 14.Nb3 (14.f4 Nd5 15.fe5 Ne3–+ (15...Ne5?! 16.Qa4 Nd7 17.Ngf3–+)) 14...Bb6 (better is 14...Nd5!? 15.Qd2–+) 15.Rc8 Qc8 16.Qc1 0–0 17.Qc8 Rc8 18.Kf2? (18.f4 Rc2 19.Ba1–+) 18...Rc2 19.Ba1 Bd3 20.Nc1 (20.Ke1 Nc5 21.Nc5 Be2–+) 20...Be2 (better is 20...Bc4 21.Kg3 Rc1 22.Bc4 Ra1 23.Bb5–+) 21.Nge2 Nd5 (better is 21...d3 22.Ke1 d2 23.Kd1 dc1Q 24.Nc1 Rg2 25.Nd3–+) 22.Kg3 g5 23.Rd1 Nf4 24.Nf4 gf4 25.Kh3 Nf6 26.Nd3 Re2 27.Nb4 Kg7 28.Nc6 Nd5 29.Nb4 Nb4 30.ab4 Ra2 31.g3 fg3 32.hg3 f5 33.g4 fg4 34.Kg4 Kf6 35.Kg3 Kf5 0–1. Fournier,Frederic – deejay (1690), Active, 2006.

4.Nf3 Nd7 5.e3 h6 6.Be2 e6 7.0–0 Bd6 (Better is 7...Ngf6!?=) 8.Bg7+/– Rh7 9.Bb2 Qc7 10.d3 Bg4 (10...Ngf6 11.c4+/–) 11.Nbd2 h5 (11...e5 12.Nh4 Be6 13.c4+/–) 12.c4 dc4 (12...Ne5 13.cd5 Nf3 14.Nf3 (14.gf3?! Bh3+/–) 14...Bf3 15.Bf3 (15.gf3?! Bh2 16.Kh1 Qe7+=) 15...Bh2 16.Kh1 ed5 17.g3+–) 13.Nc4 Bf3 14.Nd6 Qd6 15.Bf3 Ne5 16.Be5 Qe5 17.Qc2 Nf6? 18.Bc6! Kf8 19.Bb7 Rb8 20.d4 Qd6 21.Rfd1 Rb7 22.Qc8 Kg7 23.Qb7 Ng4 24.g3 h4 25.h3 hg3 26.hg4 gf2 27.Kf2 Rh2 28.Kf3 Rh3 29.Ke2 Rh2 30.Kd3 Qg3 31.Rf1 Rf2 32.Qa7 Qf3 33.Rf2 Qf2 34.Qb7 Qb2 35.Rf1 Qb3 36.Ke4 Qc2 37.Ke5 Qg6 38.Rf7! Kh6 39.Rf6 (39...Kg5 40.Rg6 Kg6 41.b5 Kg5 42.Qg7 Kh4 43.Kf4 Kh3 44.Kf3 Kh2 45.Qh6 Kg1 46.Qh3 e5 47.Qg2#) 1–0. Trkn – guest5050, ICC, 2004.

4.Nf3 e6 5.e3 Nd7 6.c4 a5 7.Be2 (7.b5!?=) 7...dc4+= 8.Bc4 ab4 9.ab4 Ra1 10.Ba1 Ngf6 (10...Bb4?? 11.Bg7 Nb6 12.Be2+– (12.Bh8?! Nc4 13.Qb3 c5+–)) 11.Qb3 b5 12.Be2 Be7 (12...Nd5 13.Bc3+=) 13.0–0= 0–0 (13...Qa8 14.Nc3=) 14.Nd4+= Bb1? (better is 14...Be4 15.Nc3 e5 16.Ne4 ed4+/–) 15.Nc6+– (15.Qb1?! Nb8=; 15.Rb1?! Nb8+=) 15...Qe8 16.Rb1 (16.Ne7?! Qe7 17.Rb1 Rb8+/–) 16...Ne4 17.Bb5 Nd2 (17...Nd6 18.Bd3 Nb8+–) 18.Qc3 (18.Qc3 Nf3 19.gf3+–) 1–0. Frank,Detlev – Gebel,Ralph, Pinneberg–ch op, 1999. (=1.a3 c6 2.b4 d5 3.Bb2 Bf5)

4.e3

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

4.e3 Nd7 5.c4 e6 6.Nf3 Ngf6 7.Be2 dc4 8.Bc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 Nbd7 5.Be2 c6 6.c4 dc4 7.Bc4 e6 8.a3).

4.e3 e6 5.c4 Be7 6.Nf3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Be7).

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

3.a3 Nf6

4.Bd4 =.

4.Nf3 Nbd7 5.e3 (--> 3.e3 Nf6 4.Nf3 Nbd7 5.a3).

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

4.Bf6 Bf5?? 5.Bb2+– e6 6.e3 f6 7.g4 (7.Ne2 e5+–) 7...Bg6 8.h4 h5 9.g5! e5 (9...fg5 10.hg5 Combination) 10.Nf3 fg5 (10...Bd6 11.c4+–) 11.Ne5 Bh7 (11...Be4 12.f3 Bh7+–) 12.hg5 (better 12.Qh5 g6 13.Ng6 Bg6 14.Qg6 Kd7 15.Bh8 g4+–) 12...Bd6 (12...Qg5 13.Rh5 Bc2 14.Rg5 (14.Qc2?! Rh5 15.Bd3 Rh1 16.Ke2 Bd6 17.Bg6 Ke7+–) 14...Bd1 15.Kd1+–) 13.g6 (better 13.Qh5 g6 14.Ng6+–) 13...Bg8 (13...Be5 14.Be5 (14.gh7?! Bb2 15.Qh5 Ke7+–) 14...Bg6 15.Rg1+–) 14.Rh5 Rh5 15.Qh5 Be5 (15...Qe7 16.Qh8 Be5 17.Qg8 Kd7 18.Bh3 Kd6 19.c4+–) 16.Qe5 Qe7 17.Qg7 Qg7 18.Bg7 Nd7 19.Bh3 (19.f4 Ke7+–) 19...Ke7 20.Nc3 (20.f4 Nf6 21.Nc3 Be6 22.Be6 Ke6+–) 20...Nf6 (20...Be6 21.Be6 Ke6 22.Ne2+–) 21.Ke2 Be6 22.Bf6 (22.Be6 Ke6 23.f4 Ng4+–) 22...Kf6 23.Be6 Ke6 24.Rg1 Rg8 25.g7 c5 (25...Kf7 26.Kd3+–) 26.f4 (better 26.bc5!? Ke5+–) 26...c4 27.Nb5 (better 27.e4 de4 28.Ne4 b6+–) 27...d4 (27...a6 28.Nc7 Kf7 29.Nd5 Rg7 30.Rg7 Kg7 31.e4+–) 28.Nd4 (better 28.e4 Kf6 29.e5 Kf7 30.Nd6 Ke6 31.Rg6 Kd5 32.d3+–) 28...Kd5 (28...Kf6+–) 29.Nf5 (better 29.Rg6 Rg7 30.Rg7 Kd6 31.e4 a5 32.e5 Kd5 33.Ke3 ab4 34.Rb7 c3 35.Rb5 Kc4 36.d3) 29...c3 30.Ne7 Kc4 31.Ng8 (31.Rg5 Rg7 32.d3) 31...cd2 (31...Kb5 32.d3 Kb6 33.Rg6 Kb5 34.Ne7 b6 35.g8Q Ka4 36.Rg5 Ka3 37.Qb3) 32.Kd2 (32.Ne7 Kc3 33.g8Q d1Q 34.Kd1 Kb2 35.Qb3 Ka1 36.Kd2) 32...a5 (32...Kd5 33.Nf6 Ke6 34.g8Q Kf6 35.Rg6 Ke7 36.Qh7 Ke8 37.Rg8) 33.Rg5 b5 (33...ab4 34.Nf6 ba3 35.g8Q Kb4 36.Qb3) 34.Rc5 1–0. FeegLood (2655) – SuperPremove (1830), lichess.org, 2015.

4.Bf6 gf6 5.d4 Bg7 6.Nc3 0–0 7.g3 Bf5 8.Bg2 Nd7 9.Nf3 e6 10.h4 Bg4 11.0–0 e5 12.Nh2 Be6 13.Nf3 Re8 14.de5 fe5–/+ 15.e4 d4 16.Ne2 Bc4 17.Re1 Kh8 18.Bf1 Bf6 19.Nc1 Be6 20.c3 Rg8 21.cd4= Qc7 22.de5 Ne5=+ 23.Ne5 Be5–/+ 24.Ne2 Rg7 25.Kh2 Rag8 26.f4 Ba1 27.Qa1 Qe7?? 28.Rd1?? Bg4–/+ 29.Qc3 Be2 30.Be2–/+ Qe4 31.Bc4 Qe7 32.Rd2 Re8 33.Bb3? Qe1?? 34.Bc4 b5 35.Bf7=+ Re2 36.Re2 Qe2 37.Kh3?? Qg4?? 38.Kh2 h5 0–1. Clyde Barrow (1665) – Rudolf, internet, 2007.

4.e3

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

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

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

4.e3 e6 5.Nf3 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).

4.e3 e6 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).

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

4.e3 Bf5 5.Nf3 Nbd7 6.c4 dc4 7.Bc4 e6 8.0–0 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 Nbd7 5.Be2 c6 6.c4 dc4 7.Bc4 e6 8.a3).

3.a4 a6

4.b5 ab5 5.ab5 Ra1 6.Ba1 cb5 7.e3 Bd7 8.Nc3 Bc6 (8...e6 9.Nb5 Nc6 10.Nf3=) 9.Bb5 (9.Nb5 Nd7+=) 9...Bb5 10.Nb5 Qb6 (10...Qd7 11.Qe2+=) 11.Qb1 (11.Qg4!? Nd7 12.Bg7+=) 11...Nd7+= 12.Nf3 f6 13.0–0 White fights for the Initiative 13...e5 14.d4 e4 15.Nd2 Be7 (better 15...f5!?+–) 16.c4+– dc4 (better 16...f5 17.cd5 Kd8+–) 17.Nc4 (17.Ne4?! Nh6+–) 17...Qc6 (17...Qd8 18.Qe4 Nb6 19.Qb7 Nc4 20.Qc6 Kf7 21.Qc4 Kg6+–) 18.Rc1 Nh6 (18...Kf7 19.Ncd6!! Bd6 20.Rc6 Bh2 21.Kh2 bc6 22.Nd6 Ke6 23.Nc8+–) 19.Ncd6!! Qd6 (19...Bd6 20.Rc6) 20.Nd6 Bd6 21.Rc8 (21.Rc8 Ke7 22.Qe4 Be5 23.Rh8+–) 1–0. DEFFM – GuestMMZS, freechess.org, 2020.

4.e3 Qc7 5.Nf3 Nd7 6.Be2 (6.c4 e5 7.Qb3 e4=) 6...Ngf6 7.0–0 e5 8.b5 g6 (8...Bd6 9.Nh4=+) 9.c4 e4 10.Nd4 c5 11.Nb3 ab5 12.ab5 Ra1 13.Ba1 b6 (13...Bd6!? 14.h3 dc4 15.Bc4 Ne5=) 14.cd5+= Qd6 (14...Bd6 15.h3+=) 15.Bc4 (15.d3 ed3 16.Qd3 Ne5+–) 15...Bg7 16.d3 0–0 (16...Ne5 17.Be5 Qe5 18.de4+=) 17.N1d2 (17.de4 Ne4 18.Bg7 Kg7+–) 17...ed3 18.Nf3 (18.Bd3?! Qd5 19.Bc4 Qg5=) 18...d2 19.Qd2 Bb7 (19...Re8 20.Qc2+–) 20.Rd1 Ne4 21.Qd3 Ba1 22.Ra1 (22.Na1 f5 23.Nb3 Ndf6+=) 22...Ndf6 (22...f5 23.Nc1+–) 23.Nbd2 Bd5?? (better 23...Nd2 24.Qd2 Rd8+–) 24.Ne4+– Be4 (24...Ne4 25.Bd5 Qf6+–) 25.Qe2 (better 25.Qd6 Kg7 26.Ng5+–) 25...Bf3 (25...Rd8 26.h3=) 26.Qf3+= Rb8 (26...Rd8 27.h3+=) 27.Rd1 (27.Ra7!? Rf8 28.Qc6 Qd1 29.Bf1+–) 27...Qe5 28.h3 Ne4? (28...Rc8 29.g4+=) 29.Bd3?? (better 29.Qf7 Kh8 30.Rd7+–) 29...f5 (29...Nc3 30.Re1=) 30.Be4 (30.Bc4!? Kh8 31.Rd7+=) 30...fe4= 31.Qg4 Qf5 (31...Ra8 32.Rf1=) 32.Qe2 (32.Qf5 gf5 33.Rd5 c4+=) 32...Kg7 (32...Qe6 33.Qc2=) 33.g4 (better 33.Qb2!? Kh6 34.Rd6+=) 33...Qe6= 34.Qd2 Rb7 35.Qc3 Kf7 (better 35...Qf6 36.Qf6 Kf6=) 36.Qh8+– Qe7?? (36...Qf6!? 37.Qh7 Qg7 38.Qg7 Kg7+–) 37.Qh7 (better 37.Rd8 Ra7 38.Rg8+– (worse 38.Qh7 Kf6 39.Qg8 Qg7+–)) 37...Kf6 38.Qh4 (38.Qh8!? Qg7 39.Qe8 Qe7 40.Qc6 Kg7+–) 38...Kf7 39.Qg3 (39.g5 Qe5+–) 39...Rd7+– 40.Qf4 Kg7 41.Rd7 Qd7 42.Qe4 Qd1? (better 42...Qb5 43.Qe7 Kg8+–) 43.Kg2+– Qd7 44.Qc6 Qd8 45.f4 (45.Kg3 Qb8 46.f4 Qd8 47.Qb7 Kf8+–) 45...Kf7 (45...Qd2 46.Kf3 Qd1 47.Ke4 Qc2 48.Ke5 Qc3 49.Kd6 Qd3 50.Kc7 Qe3 51.f5 gf5 52.Qd7 Kh8 53.Qf5+–) 46.Kf3 Kg7 (46...Qd1 47.Ke4 Qc2 48.Ke5 Qc3 49.Kd6 Qe3 50.Qb6 Qf4 51.Kc5 Qe3 52.Kc6 Qh3 53.Qd4+–) 47.g5 (47.Ke4 Qe7 48.Kd3 Qd8 49.Kc4 Qe7 50.Qb6 Qe4 51.Kc5 Qe3 52.Kc6 Qe4 53.Kd7 Qf4+–) 47...Kf7? (47...Qd1 48.Ke4 Qc2 49.Ke5 Qc3 50.Kd6 Qe3 51.Qd7 Kg8 52.Qd8 Kh7 53.Qf8 Qd3 54.Kc6+–) 48.h4 (better 48.Ke4 Qe7 49.Kd3 Qd8 50.Kc4 Kg7+–) 48...Qd1 49.Kg3?? (better 49.Ke4 Qc2 50.Ke5 Qf5 51.Kd6 Qe6 52.Kc7+–) 49...Qe1= 50.Kf3 Qf1?? (50...Qd1 51.Ke4 Qc2 52.Ke5 Qf5 53.Kd6 Qe6 54.Kc7 c4+–) 51.Ke4+– Qg2?? (better 51...Qb1 52.Ke5 Qf5 53.Kd6 Qe6 54.Kc7 c4+–) 52.Kd3 (better 52.Ke5 Qb2 53.Kd6+–) 52...Qf1= 53.Ke4 Qb1?? (53...Qg2 54.Ke5 Qb2 55.Kd6+–) 54.Kf3?? (better 54.Ke5 Qf5 55.Kd6 Qe6 56.Kc7+–) 54...Qd1+= 55.Ke4 Qh1?? (55...Qb1 56.Ke5 Qf5 57.Kd6 Qe6 58.Kc7 c4+–) 56.Ke5+– Qa1 57.Kd6 Qd1 (57...Qa7+–) 58.Kc7 Qg4 59.Qb6 (better 59.Qf6 Ke8 60.Qg6 Kf8 61.Qf6 Ke8 62.Qh8 Kf7 63.Qh7 Ke8+–) 59...Ke8 (59...Qf5 60.Qc6 c4 61.Qc4 Kf8+–) 60.Qc6 Kf7 61.Qc5 (61.Qf6 Ke8 62.Qg6 Kf8 63.Qf6 Ke8 64.Qh8 Kf7 65.Qh7 Kf8 66.g6 Qg6 67.Qg6 Ke7 68.Qg7 Ke6 69.e4 c4 70.f5) 61...Qe6 62.Qd6 Qe7 (62...Qe3 63.Qd5 Kf8+–) 63.Qd7 Qd7 64.Kd7 Kg7 (64...Kg8 65.Ke6 Kg7 66.b6 Kf8 67.b7 Kg8 68.b8Q Kg7 69.Qc7 Kh8 70.Kf6 Kg8 71.Qg7) 65.b6 Kh7 (65...Kf7 66.b7 Kg8 67.Ke6 Kf8 68.b8Q Kg7 69.Qc7 Kh8 70.Kf6 Kg8 71.Qg7) 66.b7 Kg7 (66...Kg8 67.Ke7 Kg7 68.Ke6 Kg8 69.b8Q Kg7 70.Qc7 Kh8 71.Kf6 Kg8 72.Qg7) 67.b8Q Kh7 68.Qe8 (68.Ke6 Kg7 69.Qc7 Kh8 70.Kf6 Kg8 71.Qg7) 68...Kg7 69.Qe7 Kg8 70.Ke8 (70.Ke6 Kh8 71.Kf6 Kg8 72.Qg7) 70...Kh8 71.Qf8 (71.h5 gh5 72.g6 Kg8 73.Qf8) 71…Kh7 (71...Kh7 72.f5 gf5 73.h5 f4 74.g6). KLINGON09 (1835) – Senshawn (1910), lichess.org, 2020.

4.e3 Nf6 5.Nf3 Nbd7 6.d4 e6 7.b5 Bd6 (7...ab5 8.ab5 Ra1 9.Ba1 cb5 10.Bd3=+) 8.c4= dc4 9.bc6 bc6 10.Bc4 Rb8 11.Qc2 Qa5 (11...c5 12.0–0=) 12.Nbd2 Nb6 (12...c5 13.0–0=) 13.0–0 (13.Bd3 Bb7+–) 13...Nc4 (13...0–0!?+=) 14.Nc4+– Qc7 15.Nd6 Qd6 16.Ba3 Qd5 17.Ne5 Bd7 (17...Bb7!?+–) 18.Rab1 Rd8 19.f3 Nh5?? (19...Ra8+–) 20.Bc5 f6 21.e4 (21.e4 Qc5 22.Qc5 fe5 23.Qe5+–) 1–0. DEFFM – GuestNLRD, freechess.org, 2018.

4.e3 h6 5.b5 ab5 6.ab5 Ra1 7.Ba1 Bd7 8.Nf3 Nf6 9.Ne5 e6 10.c4 c5 (10...dc4 11.bc6 Bc6 12.Bc4 Bg2 13.Rg1=) 11.d4 dc4 (11...Qc7 12.Nd2+=) 12.Bc4+= cd4 (12...Bc8 13.0–0+=) 13.Qd4+– b6 (13...Qc7 14.0–0+–) 14.0–0 Bc5 15.Qf4 Qe7 (15...0–0 16.Nd3 Be7 17.Be5+–) 16.Ng6! fg6 17.Qb8 Qd8 18.Qe5 Qe7 19.Qb8 Qd8 20.Qg3 g5 21.h4 (21.Rd1 Qc8+–) 21...Nh5 (21...Qe7!?+=) 22.Qe5+– Rg8 (22...Qe7!?+–) 23.Be6+– Qf6?? (23...Be6 24.Qe6 Kf8 25.hg5 hg5+–) 24.Bd7 Kd7 25.Qd5 (25.Qd5 Qd6 26.Qg8+–) 1–0. GuestMGWM – GuestTLHV, freechess.org, 2019.

4.Nf3 Qb6 5.b5 ab5 6.ab5 (6.Bd4 c5 7.ab5 Ra1 8.Ba1 Qb5=) 6...Ra1 7.Ba1 Qb5 8.e3 (8.e4 Qb4 9.ed5 cd5=+) 8...Qa5 9.Bc3 Qb6 10.Be2 (10.Bd4 c5 11.Be5 Nc6=+) 10...Nd7 11.d4 h6 12.Nbd2 Ngf6 13.0–0 e6 14.Bd3 Bd6 15.Qe2 Qc7 16.e4 g5?? (better 16...de4 17.Ne4 Ne4 18.Qe4 Nf6=+) 17.e5+– Be7 (17...g4 18.Nh4 (18.ed6?! gf3 19.dc7 fe2+=) 18...Be7 19.ef6 Nf6 20.Ra1+–) 18.ef6 Nf6 (18...Bf6 19.Ne5+–) 19.Ne5 Bd6 20.f4 (better 20.Qf3 Ke7 21.Ra1+–) 20...b5? (20...Nd7+–) 21.fg5 hg5 (21...Be5 22.de5 b4+–) 22.Rf6 b4 (22...Be5 23.de5 b4 24.Bd4+–) 23.Rf7 Qb8 (23...Qf7 24.Nf7 Kf7+–) 24.Bg6 (better 24.Qf2 Be5 25.de5+–) 24...Qb5 (24...Be5 25.de5 Qb6 26.Kh1 Kd8+–) 25.Rd7 Kf8 26.Qf3 (26.Rd6 Qe2 27.Rc6 Bb7 28.Bb4 Kg8 29.Bf7 Kg7=+) 26...Kg8 27.Qf7 1–0. GuestSFJC – GuestBQPP, freechess.org, 2018.

4.e3 Nd7

5.c4 Nb6 6.b5 (better is 6.c5!? Nd7 7.a5=) 6...Nc4–/+ 7.Bc4 dc4 8.Nf3 Bg4 (8...ab5 9.ab5 Ra1 10.Ba1 cb5 11.d3–+) 9.0–0? (better is 9.bc6!? Qb6 10.cb7 Qb7 11.Bc3–/+) 9...cb5 10.ab5 ab5 11.Nc3 Ra1 12.Ba1 b4?? (better is 12...Qa5–+) 13.Qa4=+ Bd7 14.Qb4 Qc8 15.Ne5 f6 (better is 15...e6!? 16.Qc4 Qc4 17.Nc4 b5=) 16.Nd7+/– Qd7 17.Qc4 Nh6 18.d4 g5 (18...e6!?+/–) 19.Ne4 Bg7 20.d5 (20.Nc5 Qc6 21.Qb3 Qd6+–) 20...0–0 21.Nc5 Qc7?? (21...Qg4 22.Qb3+–) 22.Qb4 (better is 22.d6 Nf7 23.dc7+–) 22...Rb8 23.Ne6 Qd6 24.Qd6 ed6 25.e4 Nf7 26.Bd4 Nd8 27.g3?? (better is 27.Ng7 Kg7 28.f4+/–) 27...Ne6=+ 28.de6 Kf8 (28...f5 29.Bg7 Kg7 30.ef5=+) 29.Bb6 Ke7 30.Bc7 (30.Rb1!?=) 30...Rc8=+ 31.Bb6 Ke6 32.f4 (32.Rd1 g4–/+) 32...h6 (32...Rc4 33.Ba5–+) 33.fg5 (33.Bd4 gf4 34.gf4 f5 35.Bg7 Rg8–/+) 33...hg5 34.Be3 (34.Bd4 b5–/+) 34...Rc6 (34...Ke5 35.Re1–+) 35.h4 (35.Rb1 Rc4–/+) 35...b5 36.h5 (36.hg5 Rc4–/+) 36...Rc3 (better is 36...Ke5!?–+) 37.Kf2–/+ Bh6 38.Bd4 Rc2 (better is 38...Rd3!? 39.Bf6 g4=+) 39.Kf3 g4 40.Kg4 b4?? (better is 40...Bg5+=) 41.Rf6+– Kd7 42.Rh6 b3 43.Rh7 Kc6 44.e5 (44.h6!? b2 45.Bb2 Rb2+–) 44...b2?? (better is 44...Rc4 45.Kg5 Rd4=) 45.Bb2+– Rb2 46.e6 Re2 47.e7 Kd7 48.h6 Re7 (49.Re7 Ke7+–; 48...Rh2+–) +–. stoker – KingWitch, Live Game Caissa's Web, 2004.

5.c4 dc4 6.Bc4 Nb6 7.Be2 Be6 (7...Nf6 8.Nf3=) 8.Qc2 (8.Nf3 Bg4=) 8...Qd5 (8...Nd5 9.b5=) 9.Nf3 Bf5 (9...Qb3 10.Qb3 Bb3 11.a5+=) 10.d3+– h6? (better 10...Bg6+–) 11.e4 Be4 (11...Qd6 12.ef5 Nf6 13.Ba3+–) 12.de4 Qd6 13.Qc5 (13.b5 ab5 14.ab5 Ra1 15.Ba1 Qb4 16.Nbd2 c5+–) 13...Nd7 (13...Qc5 14.bc5 Nd7 15.Bd4+–) 14.Qd6 ed6 15.0–0 (15.Nc3 Ngf6+–) 15...Ndf6 (15...Ngf6 16.Nc3+–) 16.Nbd2 (16.Nc3 d5 17.ed5 Bb4 18.dc6 bc6+–) 16...0–0–0 (16...d5 17.ed5 Nd5 18.Rfe1+–) 17.Rac1 (17.b5 d5 18.ed5 Nd5 19.bc6 f6+–) 17...Be7 (17...d5 18.e5 Ne4 19.Nb3 Bb4 20.Rfd1+–) 18.e5 (better 18.b5 ab5 19.ab5 d5 20.ed5 Nd5 21.bc6 Ngf6+–) 18...de5 19.Be5 (better 19.Nb3 Bb4 20.Ne5+– (20.Be5?! Ne7+–)) 19...Bd6? (better 19...Bb4 20.Nc4 b5 21.ab5 ab5+–) 20.Nc4 Bb4 (20...Bc7 21.Bc7 Kc7+–) 21.Nb6 1–0. DEFFM – GuestJLDD, freechess.org, 2016.

5.c4 e5 6.cd5 cd5 7.Nc3 Ngf6 8.Qb3 Nb6 9.Nf3 Bd6 (better is 9...d4!? 10.Ng5 Qe7 11.ed4 h6 12.Qf7 Qf7 13.Nf7 Kf7 14.de5 Nfd5=) 10.a5+= Nc4 11.Bc4 dc4 12.Qc4 Be6 13.Qh4 Be7 (13...0–0 14.0–0+=) 14.Qg3 e4 15.Nd4 (15.Qg7? Rg8 16.Qh6 ef3 17.gf3 Bb4–+) 15...Bc4 16.Nf5 (16.Qg7?! Rg8 17.Qh6 Rg2=) 16...g6 (16...Qd7 17.Ne7 Qe7+–) 17.Ne7+– Qe7 18.f3 (18.Na4 Rd8 19.Nb6 Bd3+–) 18...Bd3 (18...Nh5!? 19.Qf2 ef3 20.Qf3 0–0+/–) 19.fe4+– Ne4?? (better is 19...h6+–) 20.Ne4 Qe4 21.Bh8 (21.Bh8 Qb4 22.Qe5 Qe7 23.Kf2+–) 1–0. Trkn – guest2189, ICC, 2004.

5.d4 Ngf6 6.Nf3 e6 7.b5 ab5 8.ab5 Ra1 9.Ba1 Ne4 10.bc6 bc6 11.Nfd2 Qa5 12.Bb2 Bb4 13.Bd3 Nd2 14.Nd2 Nb6 15.Bc1 Nc4 (15...Ba6 16.0–0=) 16.Ke2 (16.Bc4 dc4 17.0–0 Qd5=) 16...Nd2 (16...Ba6 17.Nc4 Bc4 18.Bc4 dc4 19.f3=+) 17.Bd2 Bd2 18.Qd2 Qc7 19.c4 0–0 20.Qc2 h6 21.cd5 ed5 22.h3 Bd7 23.Ra1 Qd6 (23...Rb8 24.Qc5+=) 24.Bh7 (24.Qc5 Qc5 25.dc5 g6+=) 24...Kh8+= 25.Bf5 Be6 (25...Bf5 26.Qf5 g6 27.Qc2+=) 26.Be6 (26.Bd3 Rb8+=) 26...fe6 27.f4 Qb4 28.Ra7 Qb5 29.Kf2 Qb6 (29...e5!? 30.Qg6 Qb2 31.Kf3 e4 32.Kg3 Rg8 33.Qc6 Qb3+–) 30.Re7+– Ra8 31.Kg3 Qa5 (better 31...Rb8!?+–) 32.Qc6+– (worse 32.Re6 Rc8+–) 32...Qe1 (32...Kh7 33.Qd7 Rg8 34.Qe6+–) 33.Kh2 Rf8 (33...Qa5 34.Qe6 Rg8 35.Qe5+–) 34.Qe6 Ra8 (34...Qa5 35.Qe5 Rg8 36.f5+–) 35.Qd5 Qa1 (35...Rg8 36.Qf7+–) 36.Qe5 (better 36.f5 Qa2 37.Re8 Re8 38.Qa2 Re3+–) 36...Rg8 37.f5 Qc1 (37...Qf1+–) 38.f6 (38.f6 Qc2 39.f7+–) 1–0. DEFFM – GuestWBKR, freechess.org, 2018.

5.Nf3 Nb6 6.Be2 Nc4 (6...Bg4 7.a5 Nd7 8.0–0+=) 7.Bc4 dc4 8.0–0 (8.Qe2 b5+=) 8...b5 (8...Qd6 9.Bc3=) 9.ab5 (9.Ne5 Bb7 10.Qf3 Nf6+–) 9...cb5+= 10.d3 cd3 11.cd3 e6 12.Ne5 Bd6? (12...Bb7 13.Qh5 Qe7=) 13.Qf3 Be5 (better 13...Ra7 14.Nc6 Bb7 15.Nd8 Bf3 16.Bg7 Be2+–) 14.Be5 Nf6 (14...f6 15.Qa8 fe5+–) 15.Qa8 0–0 16.Rc1 (better 16.Qf3 Qd3 17.Bf6 gf6 18.Qf6 Qe4+–) 16...Bd7 (16...Nd5 17.Bc3+–) 17.Qd8 Rd8 1–0. GuestWLZS – GuestVBSJ, freechess.org, 2019.

5.Nf3 Qc7 6.c4=.

5.Nf3 h6 6.c4 dc4 (6...e6 7.a5+=) 7.Bc4+= Ngf6 8.Qb3 (8.Nc3 e6 9.b5 ab5 10.ab5 Ra1 11.Qa1 c5+=) 8...e6 9.Be6?? (better 9.a5+=) 9...fe6–+ 10.0–0 (10.Nd4 Nb6 11.Ne6 Be6 12.Qe6 Qe7–+) 10...Nb6 (10...a5 11.Qe6 Be7 12.ba5–+) 11.Ne5 Be7 (11...Bd6 12.Ng6 Rg8 13.f4–+) 12.Ng6 Rg8 13.Bd4 Nbd5 14.Na3 Kf7 (14...Bb4 15.Nc4–+) 15.Ne5 Ke8 16.Bc5 Bc5 (16...Nd7!? 17.Nd7 Bd7 18.Nc4–+) 17.bc5–/+ Qe7 (17...Nd7!? 18.Nac4 Ne5 19.Ne5 g5–/+) 18.d4=+ Rb8 (better 18...Nd7!? 19.f4 g5=+) 19.Nac4+= g5? (19...Nd7 20.f4 Kd8+–) 20.Nd6+– Kf8 21.Nc6! Bd7?? (21...bc6 22.Qb8 Pinning (22.Qb8 Deflection)) 22.Ne7+– Ke7 23.f4 (23.e4!? Nf4 24.Rae1 g4+–) 23...gf4 24.ef4 Bc6 (24...b5 25.ab5 Bb5 26.Nb5 Rb5 27.Qd3+–) 25.f5 Rg5 (25...b6 26.Rfe1 bc5 27.Re6 Kd7 28.Qa3+–) 26.Rae1 Nc7 (26...Rbg8 27.Rf2 (27.fe6 Rg2 28.Kh1 Ne3–/+) 27...Kd7 28.fe6 Ke7 29.g3+–) 27.Re6 (worse 27.fe6 Rg2 28.Kh1 Rg3 29.d5 Rb3 30.dc6 bc6 31.Nf5 Ke8 32.Nd6 Ke7 33.Nf5 Ke8 34.Nd6 Ke7=) 27...Ne6 28.Qe6 (28.Qe6 Kd8 29.Nf7 Kc7 30.Qd6 Kc8 31.Qd8; 28.fe6?? Rg2 29.Kh1 Rb2 30.Qf3 Bf3 31.Rf3 Rg8–+) 1–0. GuestXFHR – GuestLFBQ, freechess.org, 2020.

4.e3 Bf5

5.b5 a5 6.Nf3 c5 7.c4 dc4 8.Bc4 b6? (8...Nf6 9.Bf6 gf6 10.0–0+=) 9.Qb3?? (better 9.Ne5 e6 10.Nf7 Kf7 11.Qf3+–) 9...e6+= 10.0–0 Bd6?? (better 10...Nf6+=) 11.Bg7+– Ke7 (11...Bg4 12.e4 Nf6 13.Bh8 Ne4 14.Re1+–) 12.Bh8 f6 (12...Nh6 13.Bg7 Ng4 14.h3+–) 13.Nh4 Nh6 (13...Bg4 14.Qd3 f5 15.h3+–) 14.Nf5 (better 14.Bg7!? Ng4 15.Nf5 ef5+–) 14...Nf5 15.Be6 Be5 (15...Bh2 16.Kh1 Be5 17.Bf5 Ba1 18.Bg7+–) 16.Ra2 (better 16.Bf5 Ba1 17.Bg7 Kd6+–) 16...Nd6 (16...Bh2 17.Kh1 Nd6 18.Qd5 Qh8 19.Qa8 Ke6 20.Kh2+–) 17.Bg7 Nd7 (17...Ne8 18.Bd5 Ra7 19.Bh6+–) 18.f4 (18.Bd7 Qd7 19.f4 Ba1+–) 18...c4 19.Bc4 (19.fe5?! cb3 20.Bf6 Ke6 21.Bd8 ba2+–) 19...Nc5 (19...Nc4 20.fe5 Nce5 21.Nc3+–) 20.Qc2 Nc4 21.Qc4 (21.fe5 Qd3 22.Bf6 Ke6+–) 21...Bd6 (21...Bc7 22.Nc3 Qd3 23.Qd3 Nd3 24.Nd5 Kf7 25.Bf6+–) 22.Nc3 Qg8 (22...Qb8+–) 23.Nd5 Kd8 24.Bf6 Kd7 25.Be5 (better 25.Nb6 Kc7 26.Na8 Qa8+–) 25...Rb8 26.Nf6 (26.Nf6 Kc7 27.Ng8+–) 1–0. AhmedSultanov (1775) – Limobilengegic49 (1750), lichess.org, 2019.

5.c4 e6 6.Nf3 h6 (6...Nf6 7.Nc3=) 7.Nc3 7.Nd4 Bg6 8.h4 Nf6=) 7...Bb4 (7...Nf6 8.Qb3+=) 8.Qb3+= a5 9.cd5 Nf6 10.Nd4 0–0 (better 10...cd5!? 11.Bb5 Kf8+=) 11.de6+– Bg6 12.Bc4 (better 12.f4+–) 12...Bc3? (better 12...Na6 13.ef7 Bf7+–) 13.Bc3+– Nd5 (13...Qc7+–) 14.Qb7 Na6 (14...Nc7 15.g4+–) 15.Nc6 (better 15.Ba6 Qf6 16.Qc6 Nc3 17.dc3 fe6+–) 15...Qb6 (15...Qc7 16.Ba6 Ra6 17.Qa6 Nc3+–) 16.Ne7 Kh7 17.Bd5 Qb7 18.Bb7 Ra7 19.Ng6 Kg6 (19...fg6 20.Bd5 Nc7 21.Bd4+–) 20.Be4 f5 21.Bc2 (21.Bb1 h5 22.f3 Kh6 23.Ba5 Nc7+–) 21...Nb4 22.Bb1 Re8 (22...h5 23.e4 f4 24.d4+–) 23.g4 (23.g4 h5 24.gf5 Kh6 25.Rg1+–) 1–0. GuestQBXK – IronHard, freechess.org, 2019.

5.Nf3 Nd7 6.b5 ab5 7.ab5 Ra1 8.Ba1 e6 9.Nd4 Qa5 (9...Bg6!?=) 10.Bc3+= (worse 10.Nf5 Qa1 11.bc6 bc6=+) 10...Qb6 (10...Qc7 11.Nf5 ef5 12.bc6 bc6 13.Bd3+=) 11.bc6 bc6 12.Nf5 ef5 13.Bd3 Ngf6 14.Bf5 Bb4 (14...Be7 15.0–0+–) 15.Bd7 Kd7 16.Bf6 gf6 17.0–0 Re8 (17...Ke6 18.Qh5+–) 18.Qh5 Ke7 19.Qh7 d4? (better 19...Qb8 20.h3 Rh8+–) 20.ed4 Qd4 1–0. DEFFM – mikebikeky, freechess.org, 2019.

5.Nf3 Nd7 6.c4 Ngf6 7.cd5 (7.Nc3 e6 8.cd5 cd5=) 7...Nd5 8.Qb3 (8.b5 ab5 9.ab5 Ra1 10.Ba1 Nc5 11.bc6 bc6=) 8...N7f6 (8...e6!? 9.Nd4 Bg6–/+) 9.Nc3= e6 10.Nd5 ed5 11.Be2 Be7 12.Nd4 Be4 (12...Bd7 13.d3=) 13.f3 (13.d3 Bg6+=) 13...Bg6 14.b5 (better 14.0–0!?+=) 14...ab5=+ 15.ab5 Ra1 16.Ba1 0–0 (better 16...c5 17.Nc2 0–0=+) 17.bc6+– bc6 (better 17...Qa8!? 18.Qc3 bc6 19.Nc6 Bd6+=) 18.Nc6+– Qd6 19.Ne7 Qe7 20.0–0 1–0. GuestNTXS – GuestKMBL, freechess.org, 2019.

5.Nf3 Nd7 6.Be2 Qc7 7.0–0 e5 8.b5 a5 (8...Ngf6 9.d4 e4 10.Nh4=+) 9.c4 Be6 (9...Ngf6 10.cd5 Nd5 11.d3=) 10.bc6 bc6 11.cd5 Bd5 12.Nc3 e4 13.Nd5 cd5 14.Nd4 Ngf6 15.Nb5 Qb8 (15...Qd8!?+=) 16.Rc1+– Bd6?? (better 16...Nc5+–) 17.Rc8!!+– Qc8 18.Nd6 Ke7 19.Nc8 Rac8 (19...Rhc8 20.d3 Kf8 21.de4 de4 22.Bb5+–) 20.Ba3 Nc5 (20...Ke8+–) 21.Qb3 Rc7 (21...Rc6 22.Rc1 Rhc8 23.Qb5+–) 22.Rc1 Rhc8 23.Ba6 Ke6 24.Bc8 Nfd7 25.Qb6 (25.Qb6 Rc6 26.Qc6 Kf5 27.Rc5 Kg5 28.Qd5 Ne5 29.Qe5 f5 30.Qf5 Kh4 31.Qe4) 1–0. DEFFM – GuestVKJF, freechess.org, 2018.

5.Nf3 Nd7 6.Be2 Qc7 7.Nh4 Bg6 8.0–0 Ngf6 9.f4 e6 10.b5 Be7 (10...Bd6 11.bc6 bc6 12.a5=+) 11.c4 (11.Nc3 Nc5=) 11...dc4 12.Ng6 hg6 13.ba6 b6 (13...ba6 14.Na3=) 14.Bc4 Bd6 (14...g5!?=) 15.Qf3+= Ra7 16.e4 e5 (16...b5 17.ab5 cb5 18.Bb3+– (worse 18.Bb5 Qb6 19.Rf2 Qb5–/+)) 17.d4 ef4 (better 17...ed4!? 18.e5 Be5 19.fe5 Ne5+–) 18.e5+– Nd5? (better 18...Ne5 19.Re1 Qd7+–) 19.ed6 Qd6 20.Re1 (20.Bd5 Qd5 21.Qd5 cd5+–) 20...Kf8? (20...Kd8 21.Bd5 Qd5 22.Qf4 g5+–) 21.Ba3 Nc5 (21...Nb4 22.Qe4 Ra8+–) 22.dc5 bc5 23.Nc3 Nc3 24.Qc3 f3 25.Qe5 Qd4 (25...Qe5 26.Re5 Kg8+–) 26.Qd4 (26.Qd4 Rd7 27.Bc5 Rd6 28.Bd6 Kg8 29.Re8 Kh7 30.Qh4) 1–0. GuestFJPK – twoexpsix, freechess.org, 2019.

5.Nf3 h6 6.Be2 e6 7.b5 ab5 8.ab5 Ra1 9.Ba1 Nf6 10.0–0 Be7 11.Nd4 Be4 12.d3 Bg6 13.c4 0–0 14.Nd2 cb5 15.Nb5 Nbd7 16.Bb2 Nb6 17.Qb3 Qb8 (17...dc4 18.Nc4 Nc4 19.dc4=) 18.Bd4 (18.Bf6 Bf6 19.c5 Na8+=) 18...Nbd7 (18...dc4 19.dc4 Nbd7 20.Qb2=) 19.Ra1+= b6 20.Ra7 Nc5 21.Qc3 Re8 (21...dc4 A) worse 22.Re7 Nd5 23.Qa1 Ne7 24.Bg7 cd3 (worse 24...Nd3 25.Bh6 Qe5 26.Qe5 Ne5 27.Bf8 Kf8 28.f4+–) 25.Bh6 Nf5 26.Bf8 de2 27.Bc5 bc5=; B) 22.Qc4 Re8 23.Nf3+=) 22.Be5+– Qc8 23.Nc7 Rf8 (23...Rd8 24.Nd5 ed5 25.Re7 dc4 A) 26.Nc4 Nd5 27.Qd4 Ne7 28.Nb6 Rd4 29.Nc8 Rd7 (29...Nc8?! 30.Bd4 Bd3 31.Bd3 Nd3 32.Kf1–+) 30.Ne7 Re7–+; B) 26.Bf6?! cd3 27.Bf1 gf6=; C) 26.dc4+–) 24.cd5 (better 24.Nd5 ed5 25.Re7+–) 24...Nd5?? (better 24...ed5 25.d4 Nce4 26.Ne4 de4+–) 25.Nd5+– ed5 26.Re7 f6 (26...Nd3 27.Rc7 (27.Bd3?! Qc3 28.Bc3 Bd3+–) 27...Qf5 28.Bd3 Qd3 29.Bg7 Qc3 30.Bc3+– (30.Rc3?! Kg7 31.Kf1 Be4=)) 27.Rc7 Qa6 28.e4! fe5 (28...de4 29.Qc4 Double attack (29.Qc4 Decoy)) 29.Qe5 Rf7? (better 29...Bf7 30.Bh5 Qa8 31.Bf7 Rf7 32.Rf7 Kf7 33.Qc7 Kf8 34.Qb6 Nd3 35.Qd6 Ke8 36.Qe6 Kf8 37.ed5 Qa1 38.Nf1 Qd4 39.Qf5 Ke7+–) 30.Qe8 Kh7 31.Rc8 (31.Rf7 de4 32.Bg4 Qa1 33.Nf1 ed3+–) 31...Qc8 (31...Be4 32.Bh5 Qc8 33.Qc8+–) 32.Qc8 de4 (32...Ra7 33.Qh3 Ra1 34.Nf1 de4 35.d4+–) 33.Ne4 (33.de4 Ra7 34.Bc4 Bf7+–) 33...Ne4 (33...Ra7 34.f3 Ra2 35.Kf1+–) 34.de4 Be4 (34...Ra7 35.f3 Ra1 36.Kf2 Ra2+–) 35.Bc4 Rf6 (35...Ra7 36.Qg8 Kg6 37.Qe8 Kf6 38.Qe6 Kg5 39.h4 Kf4 40.g3 Kf3 41.Qe5 Ra1 42.Qa1 Kg4 43.Be6 Kh5 44.Qg7 Bf5 45.Qf7 Kg4 46.Qf5) 36.Bg8 Kg6 (36...Kh8 37.Bf7 Kh7 38.Qg8) 37.Qg4 1–0. GuestXQQG – GuestDKBZ, freechess.org, 2018.

3.a4 Bf5

4.b5 cb5 5.ab5 e6 6.e3 Qb6 7.Nf3 Bd6?? (better is 7...Nd7!?+=) 8.Nh4 (better is 8.Bg7 Nd7+–) 8...Nh6? (better is 8...Ne7 9.Nf5 Nf5+/–) 9.Bg7+– Ng8 (9...Bg4 10.f3 Qd8+–) 10.Bh8 (better is 10.Nf5 ef5 11.Bh8 Nd7+–) 10...f6 (10...Be4+–) 11.Nf5 ef5 12.Qh5 Kd8 13.Qh7 Be5 (13...Ne7 14.Bf6 Bc5 15.Qh8 Kd7 16.Nc3+–) 14.Qg8 Kd7 15.Qd5 Kc7 16.d4 Bd6 17.Bf6 (better is 17.Qc4!? Kd8 18.Bf6 Be7 19.Qd5 Ke8 20.Be7 Ke7+–) 17...Bb4 18.c3 Ba3 19.Qd8# 1–0. MasterofDisaster – thomas, Live Game Caissa's Web, 2004.

4.b5 Qb6 5.e3 c5 6.c4+= d4 (6...Nf6 7.cd5 Nd5 8.Qf3+–) 7.ed4 (7.Qf3 Nh6 8.a5 Qc7+–) 7...cd4 (7...Na6 8.Na3 cd4 9.Nf3+–) 8.Nf3+– Bg4 (8...d3!? 9.Ng5 Nd7+–) 9.Be2+– Bf3 (9...Nd7 10.Nd4 Ne5 11.f3+– (11.Bg4 Nd3 12.Kf1 Nb2–/+)) 10.Bf3 (10.gf3?! Nd7=) 10...e5? (better 10...a5 11.c5! Qc5+–) 11.a5 Qc5 (11...Qc7 12.a6 Nd7+–) 12.Bb7 Qc4 13.Ba8 (13.Qe2!? Qe2 14.Ke2 Nf6+–) 13...Qb5 14.Qc1 (14.Qc2 Bc5+–) 14...Bc5 15.Na3 Nd7 (15...Qa5 16.Qc4 Nf6+–) 16.Nb5 (16.Nb5 Ngf6 17.Nd6 Bd6 18.Qc8 Ke7 19.Qh8+–) 1–0. GuestSFKZ – GuestLFML, freechess.org, 2020.

4.b5 Nd7 5.d4 (5.Nf3!?=) 5...Ngf6 6.e3 e6 7.Nd2 c5 8.c4 cd4 9.ed4 dc4 10.Bc4 Rc8 11.Qf3 (11.Ngf3!?–/+) 11...Bb4 12.Bc3 Bc3 13.Qc3 Nb6 14.Ngf3 Bg4 (better is 14...Ne4!? 15.Ne4 Be4–+ (15...Rc4?! 16.Qe3+=; 15...Nc4?! 16.Nc5+=)) 15.Ne5+= Bf5 16.0–0 0–0 17.Rfc1 Nc4 18.Ndc4 Ne4 19.Qb4 (better is 19.Qe3!? Qd5 20.f3=) 19...Qd4–/+ 20.Ra2?? (20.Qe1 Rfd8–/+) 20...Rfd8 (better is 20...Qe5! 21.Rac2 Qf6–+) 21.Rac2 (21.Re2 Nc3! 22.Rd2 Qd2 23.Nd2 Ne2 24.Kf1 Nc1–+) 21...f6 (better is 21...Qd1! 22.Qe1 Qe1 23.Re1 f6–+) 22.Nf3–/+ Qd7 23.Ne3 Rc2 24.Nc2 Rc8 25.Nfd4 Bg6 26.Re1 (better is 26.f3!? Ng5 27.f4–/+) 26...e5–+ 27.Qb3 (27.Nf3 Nf2 28.Kf2 Rc2 29.Re2 Re2 30.Ke2 Qd3 31.Kf2 b6–+) 27...Bf7 (27...Kh8 28.Qb2 Nc3 29.Qa3–+) 28.Qb2 ed4 (better is 28...Nc5!? 29.Nf3–+) 29.Re4 d3 30.Nd4 Bg6 (better is 30...f5 31.Re1 Rc4–+) 31.Rf4?? (31.Re1 Qd5–+) 31...Qd6 (better is 31...Qc7!? 32.Nc6 bc6 33.Rc4–+) 32.g3 Qc5 33.Nb3 Qc2 34.Qc2 dc2 35.Kg2 c1Q 36.Nc1 Rc1 37.Rd4 h6 38.Rd8 Kh7 39.Rd7 Rc4 40.a5 Rc5 41.a6 Rb5 42.h4 ba6 43.Ra7 a5 44.g4 Bc2 0–1. tschulz – Joschi, Schach Master, 2004.

4.b5 Nf6 5.e3 Nbd7 6.Nf3 e6 7.Be2 Bd6 8.d4 Ne4 9.Nbd2+= Nd2 10.Qd2 Qe7 (10...Nf6 11.0–0 Ne4 12.Qc1+=) 11.0–0 0–0 12.c4 dc4 (12...Nf6 13.c5 Bc7 14.Qc1+=) 13.Bc4= Nf6 (13...Rfc8 14.Rfc1=) 14.Bd3 (14.bc6 bc6 15.Ne5 Ne4=) 14...Ne4 (14...Rfc8!?=) 15.Qc2+= Ng5 16.Ng5 Bd3 17.Qd3 Qg5 18.f4 Qg6 19.e4 (19.Qg6 hg6 20.bc6 bc6+=) 19...f5 (19...Rac8 20.Rf3 Rfd8 21.Rg3+=) 20.e5 Be7 21.Rf3 (21.bc6 bc6 22.Qc4 Rfd8+=) 21...Rfd8 22.Rg3 (22.bc6 bc6 23.Qc4 Rab8+=) 22...Qf7 (22...Qe8=) 23.Ba3 (23.bc6!? bc6 24.Qc4+=) 23...c5 (23...Ba3!? 24.Qa3 cb5 25.ab5 Rd4–/+) 24.Qf3= cd4 25.Qb7 Ba3 26.Qf7 Kf7 27.Raa3 Rd7 28.Rgd3 Rc8 29.h3 h6 (29...Rc4 30.Kf2+=) 30.a5 Rb8 31.Rab3 g5 32.g3 Kg6 (32...Rd5 33.a6=) 33.Rb4 gf4 34.gf4 Rd5 35.b6 Ra5 36.Rdd4 ab6 37.Rd6 Kf7 38.Rdb6 (38.Rd7 Kg8=) 38...Rb6 39.Rb6 Ra4 40.Rb7 Ke8 41.Rh7 Rf4 42.Rh6 Kd7 43.Rh7 Kc6 44.h4 Kd5 45.h5 Rh4 46.h6?? Ke5–+ 47.Rh8 f4 48.h7 Ke4 49.Kg2?? e5–+ 50.Kf2 f3 51.Kg3–/+ Rh6 52.Kf2 Rh5 53.Rf8?? Rh7 54.Rf3 Rh2 55.Kg3 Rh3!! 56.Kh3 Kf3 57.Kh2 Kf2 58.Kh1 e4 0–1. Pan,Konstantin – Bezborodov,Egor, Ulyanovsk RUS, Povolje Open, 2014.

4.e3 (--> 3.e3 Bf5 4.a4).

4.b5 c5

5.e3 b6 6.c4 dc4 7.Bc4 Nf6 8.Qb3 e6 9.Be2 Be7 (better 9...Nbd7!?=) 10.Bf3+– Be4 11.Be4 (11.Bf6 Bf3 12.Be7+– (12.Nf3?! Bf6 13.Nc3 0–0=)) 11...Ne4= 12.Nf3 Nf6 13.0–0 0–0 14.Qc2 Nd5 (better 14...Nbd7=) 15.Ng5?? (better 15.d4+=) 15...Bg5–+ 16.f4 (16.d4 Bf6 17.dc5 Nb4–+) 16...Bf6 17.Rf3 (17.Bf6 Qf6 (17...gf6?! 18.f5–+) 18.Nc3 a6–+) 17...Bb2 (17...Nb4 18.Qb3–+) 18.Qb2 Qf6 19.Qa2 (19.Qf6 Nf6 20.a5–+) 19…Nb4 (19...Nb4 20.Qa3 Nc2–+) 0–1. AhmedSultanov (1815) – Patapumpfete (1745), lichess.org, 2019.

5.e3 e6 6.c4 d4 7.ed4 cd4 8.Nf3 (8.Qf3 Bc5=) 8...Bc5=+ 9.Na3 Nd7 (9...Nf6 10.Nc2 e5 11.a5=+) 10.Nc2 Now all is on d4 (better 10.Bd4!? Bd4 11.Nd4+=) 10...e5=+ 11.Qe2?? (better 11.a5=+) 11...f6 (11...d3 12.Qd1 dc2 13.Qe2–+) 12.Ba3?? (better 12.Nfd4 Bg6 13.Ne6+–) 12...d3–+ 13.Qd1 dc2 14.Qc1 Qb6 15.d3 (15.a5 Qd6 16.Ra2–+) 15...Bf2 16.Kd2 (16.Ke2 Nc5 17.Bc5 Qc5 18.Qc2–+) 16...Be3 17.Kc3 Bc1 (17...Bc1 18.Bc1 Rc8 19.Kc2 Rc4 20.Kd1 Qd6–+) 0–1. AhmedSultanov (1830) – euyin (1805), lichess.org, 2020.

4.b5 Qc7

5.e3 e5 6.Nf3 Nd7 7.c4 Ngf6 8.Be2 Bb4 9.0–0 0–0 10.Qb3 (10.bc6 bc6 11.Nc3 Rfb8=+) 10...Bd6–/+ 11.Nc3 d4 (better 11...dc4!? 12.Qc4 e4=+) 12.ed4= ed4 13.Nd4 Bh2 (13...Nc5!? 14.Qa2 Bg6=) 14.Kh1+= Bg6 15.Nf3 (better 15.g3!? Bg3 16.fg3 Qg3 17.Nf3=) 15...Nc5= 16.Qd1 Bd6 17.d4 Ne6 18.Bd3 (18.Nh4 Rad8=) 18...Nf4 19.Bg6 Ng6 20.Rc1 (20.Re1 Rfe8=) 20...Qc8 21.d5 Qf5 (21...Qg4 22.Ne2 Nh4–/+) 22.dc6+= Qh5 23.Kg1 Rad8 24.Nd2?? (better 24.Nd5 Ng4 25.Re1 bc6 26.bc6 Bh2 27.Kf1=) 24…Qh2 0–1. AhmedSultanov (1845) – Korl (1970), lichess.org, 2020.

5.Nf3 Nd7 (5...Nf6 6.Be5 Qc8 7.Nc3=) 6.Nd4 (6.Nh4!? Bg4 7.h3=) 6...Bg6=+ 7.e3 (7.f4 Qf4 8.bc6 bc6 9.Nc6 Ngf6–/+) 7...e5 8.Nf3 (8...Ngf6 9.bc6 bc6 10.Nc3=+). TONDA – shooin, Live Game Caissa's Web, 2006.

4.b5 e6

5.d3 Nf6 6.h3 Be7 7.g4 Bg6 8.g5 Nfd7 (8...Nh5 9.Nf3=+) 9.Bg7 Rg8 10.Bb2 Bg5 11.Nf3 Bf6 12.Bf6 Qf6 13.c3 Nc5 (13...Bh5 14.Nh2=+) 14.d4 Ne4 15.Ra3 (15.Rg1 c5=+) 15...Nd7 16.h4 (16.bc6 bc6 17.Rg1 c5=+) 16...Nd6 (16...c5 17.h5 Bf5 18.Nbd2–/+) 17.h5 Be4 18.Rg1? (better 18.bc6!? bc6 19.Nbd2=+) 18...Rg1–+ 19.Ng1 Qg5 (better 19...cb5 20.Nd2 ba4 21.Qa4 Qh6–+) 20.e3?? (20.bc6 bc6 21.Nh3 Qh5–/+) 20...Nf6 (better 20...Qg1 21.bc6 bc6–+) 21.Nh3–/+ Qh5 22.Qh5 Nh5 23.Ng5?? (23.Nd2 Bf5 24.bc6 bc6–/+) 23...Bg6 (23...Bb1 24.bc6 bc6 25.Nf3–+) 24.f4?? (better 24.Nd2–/+) 24...Ng3 (24...Bb1 25.bc6 bc6 26.c4–+) 25.Bh3? (25.Nd2 Nf1 26.Kf1 cb5–+) 25...Nge4 (better 25...Bb1 26.Rb3 Be4 27.bc6 bc6–+) 26.Ne4 Be4 (26...de4?! 27.bc6 bc6 28.Rb3=+; 26...Ne4?! 27.Nd2–/+) 27.Nd2 Bg6 (better 27...cb5!? 28.Ne4 de4–+) 28.bc6 bc6 29.Rb3 (29.c4 Rb8 30.c5 Nf5–/+) 29...Kf8 (29...Bc2 30.Ra3–+) 30.Kf2 (30.c4 dc4 31.Rc3 Rb8–+) 30...Kg7 (30...Bc2 31.Ra3–+) 31.Kg3 (31.a5 Bd3–/+) 31...Ne4 (better 31...Bc2!? 32.Ra3 Rb8–+) 32.Ne4–/+ Be4 (worse 32...de4 33.Rb7 Kf6 34.Rc7+=) 33.Rb7 Kf6 34.Kh4 Bg6 (34...c5 35.dc5 Rc8 36.Rb5–/+) 35.Kg3 (35.Rc7 a5=+) 35...Bc2 36.a5 Bd3 37.Rc7 Bb5 (37...a6 38.f5=+) 38.Bg2 (38.f5!?=) 38...a6 39.e4 Rh8 (39...Rg8 40.Kf2=+) 40.ed5 (40.e5!? Kg6 41.Bf3=) 40...ed5 41.Bf3 h5 (41...Re8 42.Kf2–/+) 42.Kh4=+ Rh7 43.Bh5 (43.Bd1!?–/+) 43...Kf5 44.Rf7 Rf7 45.Bf7 Kf4 46.Bg6 (46.Be8–+) 46...Ke3 47.Kg5 Kd2 48.Kf6 Kc3 49.Ke6 (49.Ke5 Kb4 50.Kd6 Ka5 51.Kc5–+) 49...Kd4 50.Kd6 Kc4 51.Be8 (51.Ke5 d4 52.Be4 c5–+) 51...Kb4 52.Bc6 (52.Ke5–+) 52...Bc6 53.Kc6 Ka5 (53...d4 54.Kd6–+) 54.Kd5 Kb4 55.Kc6 a5 56.Kb6 a4 57.Ka6 a3 (57...a3 58.Kb6 a2 59.Kc6 Kc4 60.Kd6 a1Q 61.Ke6 Qd4 62.Kf5 Kd5 63.Kg5 Ke6 64.Kg6 Qg4 65.Kh6 Kf6 66.Kh7 Qg7) 0–1. AleksandrNekhoroshik – JRSilva, lichess.org, 2021.

5.e3 Nf6 6.Nf3 Bb4 7.Nc3 0–0 8.Nd4 Bg4 9.Be2 Be2 10.Qe2 Ne4 (10...Bc3 11.Bc3 Re8 12.0–0=) 11.Ne4= de4 12.c3 (12.0–0 Qh4=) 12...Ba5 (12...Bd6 13.bc6 bc6 14.d3 ed3 15.Qd3+=) 13.Nb3 b6 (13...Bc7!?=) 14.Na5 ba5 15.Qc4 Qh4 (15...cb5 16.ab5 Nd7 17.Ba3+=) 16.bc6+/– Qg5 (16...Rc8 17.d3+/–) 17.Qe4+– Na6 (17...Rc8 18.d3+/–) 18.h4 Qf6 19.Qd4 (19.Ba3!? Rfc8 20.Rb1+–) 19...e5+/– 20.Qd5 Qe7?? (better is 20...Rac8+/–) 21.Ba3+– Qd8 22.Qd8 (better is 22.Qc4 Nc7 23.Bf8 Qf8 24.Rb1+–) 22...Rfd8 23.Rb1 Rac8 24.Rb5 Rc6 25.Re5 Rcd6 26.Bd6 Rc8 27.Ra5 Rc6 28.Bg3 Nc5 29.Ra7 g6 30.Ra8 Kg7 31.Be5 Kh6 32.Bf4 Kg7 33.h5 Nd3 34.Ke2 Nf4 35.ef4 Re6 36.Kd3 Rd6 37.Kc2 Re6 38.h6 Kf6 39.g4 Re2 40.Ra6 Ke7 41.Rb1 1–0. Henkel,Scott – Dimon,Richard, Kalamazoo op12, 1999.

5.e3 Nf6 6.Nf3 Bb4 7.c4 0–0=+ 8.Nd4 Bb1 (8...Bg6 9.cd5 Nd5 10.Nc3=+) 9.Rb1= Ne4 10.Nf3 dc4 (10...Be7 11.Qc2=) 11.Bc4 (11.Bg7 Kg7 12.Rb4 Nd6+=) 11...a5 Increases the pressure on the backward pawn (11...Be7 12.Qc2 Nd6 13.Bd3+=) 12.Qc2 Nf6 (12...Nd6 13.Bd3 h6 14.0–0=) 13.0–0+= cb5 14.ab5 (14.Bb5 Nc6+=) 14...Nbd7= 15.Ra1 Rc8 (15...Qe7 16.d3=) 16.Qb3 (16.d3 Qe7+=) 16...Nb6= 17.d4?? (better 17.Be2=) 17...Nc4–+ 18.Rfc1 (18.Bc3 Bc3 19.Qc3 Qd5–+) 18...Nb2 (18...Qd5 19.Ne5 Ne5 20.Qd5 Nd5 21.Rc8 Rc8 22.de5–+) 19.Qb2 Rc1 20.Rc1 b6 (20...Qd5 21.Qe2–+) 21.Ne5 Qd5 22.Nc6 (22.Qe2 Bd6 23.Nf3 a4–+) 22...Qb5 23.Na7 (23.Nb4 Nd5–+) 23...Qd3 24.Nc6 Qd2 (24...Ba3 25.Qc3 Qc3 26.Rc3–+) 25.Qb1 (25.Qd2 Bd2 26.Rc2 Bb4–+) 25...Ne4 (better 25...Bd6 26.Rd1 Bh2 27.Kh1 Qf2 28.Ne7 Kh8 29.Kh2 Ng4 30.Kh1 Ne3–+) 26.Rd1 (26.Rc2 Qe1 27.Qe1 Be1 28.f3–+) 26...Qf2 27.Kh1 Qe3 28.Ne5 (28.Rf1 Rc8 29.Rf3–+) 28…Nf2 (28...Nf2 29.Kg1 Nd1 30.Kh1 Qe1) 0–1. AhmedSultanov (1865) – Hanawa (1880), lichess.org, 2020.

5.e3 Nf6 6.Nf3 c5 7.c4 Nbd7 8.Nc3 dc4 (8...Be7 9.cd5 ed5 10.Be2=) 9.Bc4 Be7 10.0–0 Qc7 11.Nh4 (11.a5 0–0=) 11...Bg6 (11...Ng4 12.Nf3=+) 12.Nf3 (12.f4 Bh5 13.Nf3 Qa5=) 12...Bd6 13.g3 (13.a5 0–0=) 13...h5 (13...0–0 14.a5=+) 14.Nh4 0–0? (better 14...Bh7=) 15.d4?? (15.Ng6 fg6 16.Be6 Kh7+–) 15...Rad8?? (better 15...cd4 16.Ng6 dc3 17.Bc3 fg6 18.Be6 Kh7–+) 16.Ng6+– fg6 (better 16...Rfe8 17.Qb3 cd4 18.ed4 Nb6+–) 17.Ba3 (17.Be6!? Kh7 18.Rc1+–) 17...Rfe8 (17...cd4 18.Be6 Kh7 19.ed4 Ba3 20.Ra3+=) 18.Qb3+– Nf8 19.Rad1 Kh7 (better 19...cd4 20.Bd6 Rd6 21.Rd4 Rd4 22.ed4 Qd6+–) 20.e4?? (20.a5 b6 21.dc5 Bc5 22.Bc5 Qc5+–) 20...e5?? (20...cd4 21.Bd6 Qd6=+ (worse 21...Rd6 22.e5 Rdd8 23.ef6 dc3 24.Qc3+=)) 21.dc5+– Bc5 22.Nd5 Nd5 23.Bd5 Bd4? (better 23...Ba3!? 24.Qa3 Ne6+–) 24.Rc1 (24.Bg8 Kh8 25.Bf7 Qd7+–) 24...Qd7 25.Bb2 (better 25.Bg8!? Kh8 26.Bf7+–) 25...Ne6+= 26.Rfd1 Ng5 (26...Bb2 27.Qb2 Nd4 28.Rd3+=) 27.Bd4+– ed4 28.Rd4 (28.f3 Rc8 29.Rc8 Qc8 30.h4+– (30.Rd4? Qc5 31.Qe3 Qd4 32.Qd4 Nf3 33.Kf2 Nd4–+)) 28...Qh3? (better 28...Qg4!? 29.Rd3 Rf8+=) 29.Rd3 (29.Rcd1 Rc8 30.Qe3 Qg4+–) 29...Rf8 (better 29...Rc8 30.Rc8 Qc8+–) 30.Be6?? (better 30.f4 Ne6 31.Rcc3+– (31.Be6?! Rd3 32.Bg8 Rg8 33.Qd3 Rf8+–)) 30...Qe6 (better 30...Rd3!? 31.Qd3 Qe6 32.f4 Ne4 33.Qd4–+) 31.Qe6–/+ Ne6 32.Rd8 (32.Rd5 Rc8 33.Rc8 Rc8–+) 32...Nd8 (32...Rd8 33.Rc4–+) 33.Rc7 g5 34.Rc5 (34.h3 Rf7 35.Rc5 Ne6–/+) 34...Kh6 (34...Kg6 35.h3–+) 35.Kg2 (35.h3 Ne6 36.Re5 Rf6–/+) 35...g6 36.Rd5 g4 37.h3 (37.Rd7 g5–+) 37...gh3 38.Kh3 Ne6 39.f4? (better 39.Kg2–+) 39...Rf4! 40.e5 (40.gf4 Nf4 Double attack) 40...Rf3 (better 40...Ra4!? 41.Kg2–+) 41.Rd7 Ra3 42.Rb7 (42.Re7 Ng5 43.Kg2 Ra4 44.Rb7 Ra2 45.Kf1 Ne4–+) 42...Ng5 (better 42...Ra2 43.g4 Ng5 44.Kg3 h4 45.Kh4 Ra3 46.Rh7 Nh7 47.g5 Ng5–+) 43.Kg2 Ra4 0–1. AhmedSultanov (1895) – ZlobinBG (1890), lichess.org, 2019.

4.c4 Nd7

5.cd5 cd5 6.e3 Rc8 7.Qb3 (7.Bc3 e5 8.Nf3 Bd6 9.Bb5 Qe7 10.–0 Ngf6 11.Qb3 0–0 12.d4+=; 7.Nc3 e6 8.b5 Ngf6 9.Nf3 e5 10.Be2 Bc5 11.d3 d4 12.ed4–/+; 7.Nf3 e6 8.Bc3 Ngf6 9.Nd4 Bg6 10.Bb5 a6 11.Be2 Bd6 12.0–0+=) 7...e6 8.Nc3 Ngf6 9.Nf3 Qb6 10.Bb5 Qd6 11.Nh4 Bg6 12.Ba3 +=.

5.cd5 cd5 6.e3 e6 7.Nf3 (7.Bc3 Ngf6 8.Nf3 Rc8 9.Bb5 Bd6 10.–0 a6 11.Be2 0–0 12.b5+=; 7.Nc3 Rc8 8.Qb3 Ngf6 9.a5 Bd6 10.Nb5 Bb8 11.Nd4 Bg6 12.f4+=; 7.b5 Rc8 8.Nc3 Ngf6 9.Nf3 Bd6 10.Be2 0–0 11.0–0 Ne5 12.Ne5+=) 7...Ngf6 (7...Bb4?? 8.Bg7 Rc8 9.Bh8+–) 8.b5 (8.Bc3 Rc8 9.Bb5 a6 10.Be2 Bd6 11.b5 a5 12.d3+=) 8...Rc8 9.Nd4 (9.Nc3 Bd6+= 10.Be2 e5 11.0–0 0–0 12.a5+=) 9...Bg6–/+ 10.Nc3 (10.f4 Ne4 11.Nf3 f6 12.Be2+=) 10...Bb4 (10...e5 11.Nf3+= e4 12.Nd4+=; 10...Bd6 11.f4 Nc5 12.Rc1–/+) 11.Be2 0–0 (11...e5 12.Nf3+=) 12.0–0 Bc3 (12...e5 13.Nf3+=) 13.dc3 (13.Bc3 e5 14.Nf3 Qe7=) 13...Ne4+= 14.Qe1 Ne5 (14...Qc7 15.a5+=) 15.f4 (15.f3!? Nc5 16.Ba3+=) 15...Nc4–/+ 16.Bc4 Rc4 17.Nf3 Qa5 18.Nd2 (18.Ba3 Rfc8 19.Bb4+=) 18...Ra4–+ 19.Ne4 Be4 (19...de4?! 20.c4 Ra1 21.Qa1=) 20.Qe2 Ra1 21.Ra1 Qb6 22.Kf2 Rc8 23.Ra4 f6 (23...Qc5!? 24.Kg1–+) 24.c4–/+ Qc5 (24...Qc7 25.Qg4 Bf5 26.Qg3–+) 25.Bd4 Qc7 26.c5? (better is 26.cd5 Qd8 27.Bf6 Qf6 28.Re4 Qh4 29.Kf3 Qh2 30.d6 Qh5 31.Kf2 Qh4 32.Kf3=) 26...e5–+ 27.b6 ab6 28.cb6 Qc2 29.fe5 Qa4 30.ef6 Rc2 31.fg7 Re2 32.Ke2 Qc2 33.Ke1 Qg2 0–1. Pruvost,Alain – Vallet,Vincent, Open A, Bethune FRA, 2002.

5.cd5 cd5 6.e3 Ngf6 7.Bf6 (7.Nf3 e6 8.Bc3 Rc8 9.a5 Ne4 10.Nd4 Qh4 11.g3 Qf6 12.Bb5+=; 7.Bb5 e6 8.Bc3 a6 9.Bd7 Qd7 10.Nf3 Ne4 11.Qb3 a5 12.Ne5+=; 7.Qb3 e5 8.Nf3 Qe7 9.Nc3 Qb4 10.Qb4 Bb4 11.Nb5 Rc8 12.Bc3+=) 7...ef6 8.Qb3 Rc8 9.Na3 Be6 10.Nf3 Qe7 11.Rb1 Ne5 12.Nd4 =.

5.cd5 cd5 6.Nf3 A) 6...Rc8 7.Nc3 (7.Bd4 Ngf6 8.Nc3 e6 9.Qb3 Rc4 10.b5 Bc5 11.e3 Bd4 12.Nd4+=; 7.Bc3 e6 8.e3 Ngf6 9.Nd4 Bg6 10.Bb5 a6 11.Be2 Bd6 12.0–0+=; 7.e3 e6 8.Bc3 Ngf6 9.Nd4 Bg6 10.Be2 e5 11.Nf3 Bd6 12.Nh4+=) 7...e6 8.Qb3 Ngf6 9.a5 Rc4 10.Ba3 Ne4 11.e3 Rc8 12.Bb2=; B) 6...e6 7.Qb3 (7.e3 Rc8 8.Bc3 Ngf6 9.Nd4 Bg6 10.Be2 e5 11.Nf3 Bd6 12.Nh4+=; 7.Bc3 Ngf6 8.e3 Rc8 9.Nd4 Bg6 10.Bb5 a6 11.Be2 Bd6 12.0–0+=; 7.b5 Rc8 8.Nc3 Ngf6 9.Rc1 Bd6 10.Nh4 Bg6 11.Ng6 hg6 12.e3+=) 7...Rc8 8.Nc3 Ngf6 9.a5 Be7 10.e3 0–0 11.Be2 Be4 12.a6+=.

5.e3 e5 6.b5 cb5 7.ab5 Ngf6 8.cd5 Bd6 9.Nf3 (9.Nc3 0–0=) 9...Bg4 (9...Nd5 10.Nc3 Nc3 11.dc3+=) 10.Be2 0–0 11.Nc3 e4 12.Ng5 Be2 13.Qe2 (worse is 13.Ne2 Nc5 14.Nc1 h6–/+ (14...Nd5?! 15.Nh7 Ne3 16.de3 Kh7 17.Qg4+=)) 13...Nc5 14.0–0 h6 15.Nge4 (better is 15.Nh3!?=) 15...Nfe4 16.Ne4 Ne4 17.Qg4 Nf6 18.Bf6 Qf6 19.e4 (19.d4 a6–/+) 19...Qf4 (better is 19...Qe5 20.Qh4 f5–+) 20.Qf4–/+ Bf4 21.d3 Rfc8 22.g3 Be5 23.Ra4 Rc2 24.d4 Bc7 25.Rfa1 Bb6 26.d6 Kf8 27.e5 Ke8 28.Re1 Kd7 29.Re4 Ke6 30.Rf4 Rf8 31.d7? (31.Kf1–+) 31...Kd7 32.d5 (32.Rb4 Ke6 33.Kg2 Kd5–+) 32...Rc5 33.e6 Ke7 34.Rae4 f5 35.d6 (35.Re5 Bc7 36.Rff5 Be5 37.Re5–+) 35...Kd6 36.e7 Re8 37.Rc4 (37.Rb4 g5 38.Rfd4 Ke7–+) 37...Rc4 (37...Rb5!? 38.g4–+) 38.Rc4 Re7 39.Rf4 (39.Kf1 Re5–+) 39...Ke6 (better is 39...Re5!? 40.g4 Rb5 41.gf5–+) 40.Kg2 g5 41.Rc4 Rc7 (41...Rc7 42.Rb4 Rc2–+) 0–1. Pruvost,Alain (1630) – Pavillon,Guillaume (1760), Bethune op–B, 2004.

4.Nf3 e6

5.b5 cb5 6.ab5 Nf6 7.e3 Qc7 8.Bf6 gf6 9.Ra2 Nd7 10.Nd4 Bg6 11.h4 h5 12.Be2 Bg7 13.0–0 (13.Nc3 Nc5=) 13...Ne5 (better is 13...f5!?+=) 14.f4+= Nc4 15.f5 ef5 16.Nf5 Bf5 17.Rf5 Rd8 (17...d4 18.ed4 Nd6 19.Rh5 Rh5 20.Bh5+–) 18.Qf1 (18.Bc4 dc4 19.Qf3 Qb6+–) 18...Nd6 (18...a5 19.ba6 ba6 20.Ra6+–) 19.Rd5 Ne4 20.Rd8 Kd8 (20...Qd8 21.Ra7 f5 22.Qf5+–) 21.Bf3 Ng3 (21...f5 22.Ra7 Qg3 23.d3+–) 22.Qd3 Kc8 (22...Qd7 23.Ra7 Qd3 24.cd3 b6+–) 23.Ra7 Kb8 24.Qa3 Qc2 (24...Ne2 25.Kf2 Qg3 26.Ke2 Qf3 27.Kf3 Bf8 28.Qa5 Kc8 29.Ra8 Kd7 30.Rd8 Ke6 31.Qa2 Kf5 32.Qf7 Bd6 33.e4 Ke5 34.Qd5) 25.Rb7 Kc8 26.Qa8 1–0. b4_player (2245) – tigran (1690), GameColony.com, 2003.

5.b5 Nf6 6.e3 Bd6 7.Be2 Nbd7 (7...a6 8.Nh4=) 8.Nd4 (8.Nh4 Be4=) 8...Bg6 (8...Be4 9.bc6 bc6 10.Nc3=) 9.bc6 bc6 10.Nc6 Qc7 (10...Qc8 11.Nd4=) 11.Nd4 Bh2 (11...a6 12.h4=) 12.Nb5 (12.Nc3 a6=) 12...Qb8 13.N1c3 Be5 (13...a6 14.Nd4=) 14.f4 Bf4 15.ef4 Qf4? 16.Ba3–/+ Qg3 17.Kf1 Rb8? 18.Bd6+– Qg5 19.Bb8 Nb8 20.Kg1 Ke7?! 21.Na7 h5 22.Rb1 Nbd7 23.Nc6 Kd6 24.Nd4 h4 25.Nf3 Qg3 26.Nb5 Ke7 27.Rh3 Qf4 28.Nbd4 Ne4 29.Bb5 Ng3 30.Bd7 Kd7 31.Rb7 Kd6 32.Qa1 Be4 33.Qa3 1–0. market (2255) – rwfield (1840), GameColony.com, 2002.

4.Nf3 f6

5.e3 e5+= 6.b5 Bd6 +=.

5.e3 e5 6.Nh4 Be6 7.Nc3 (7.b5!?+=) 7...Bb4 8.Qh5 Bf7 9.Qg4 Bd6?? (better is 9...Bf8–/+) 10.Qg7+– Ne7 (10...Qd7 11.Qh8 Be6 12.Bd3+–) 11.Qh8 (11.Qh8 Kd7 12.Qh7+–) 1–0. pierre – wibter, internet, 2011.

5.e3 e5+= 6.Nh4 Bg6 7.Ng6= hg6 8.Nc3 (8.Qg4 Rh6=) 8...Bb4 9.Qg4 Kf7?? (better is 9...Qe7=) 10.Qb4+– Qd7 (10...b6 11.e4 Ne7 12.a5+–) 11.Ba3 (11.e4 d4 12.Bc4 Ke8+–) 11...Na6 (11...b6 12.Qf8 Ke6 13.Ba6 Na6 14.Qa8+–) 12.Qb3 Qe6 (12...Nb8+–) 13.Qb7 (13.Qb7 Ne7 14.Ba6+–) 1–0. marre – rajticek, internet, 2010.

5.Nh4 Bg4 =.

3.c4

3.c4 dc4 4.e3 Nf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 dc4).

3.c4 Nd7 4.e3 e5 (--> 1.b4 c6 2.c4 d5 3.e3 e5 4.Bb2 Nd7).

3.c4 Bf5 4.e3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 c6).

3.c4 d4

4.e3 de3 5.fe3 e6 6.Nf3 Nf6 7.c5 Nbd7 8.Be2 b6 9.d4 bc5 10.bc5 Nd5 11.Qd2 Be7 12.0–0 Bg5 13.Ng5+/– Qg5 14.e4 Qd2 15.Nd2+/– N5f6 16.e5 Nd5 17.Nf3 0–0 18.Bc4 Ne3 19.Rfc1 a5 20.Rc3 Nc4= 21.Rc4 a4 22.a3 Ba6 23.Rb4 Bb5 24.Bc3 f6 25.Rf1?? fe5 26.Rf2 e4 27.Ne5 Rf2 28.Kf2 Ne5 29.de5= Rf8 30.Ke3 Rf1 31.Rb2 Rc1 32.Bd4 Ra1 33.Ke4 Ra3=+ 34.Kf4 h6 35.h4 Rd3 (36.Ke4 a3–/+) 0–1. grain – lowbrow1, Live Game Caissa's Web, 2005.

4.e3 de3 5.fe3 Nf6 6.Nf3 e6 7.b5 cb5 8.cb5 Be7 9.a4 0–0 10.Be2 b6 11.0–0 Bb7 12.Nc3 Nbd7 13.Nd4 Rc8 14.Bf3 Bf3 15.Qf3 Ne5 16.Qe2 Nc4 (16...Bc5 17.Nd1 Qd6 18.Nf2 Bd4 19.Bd4=) 17.Rab1 (17.Nc6 Rc6 18.bc6 Nb2+=) 17...Nb2 18.Rb2 Bc5 (18...Bd6 19.Rc2=) 19.Nc6+= Qc7 20.d4 Bd6 21.h3 Nd5 (21...a6 22.e4 Ba3 23.Rb3 ab5 24.ab5+– (24.Ra3?! Qc6 25.ab5 Qd6=)) 22.Nd5 ed5 23.e4 de4 24.Qe4 Rce8 25.Qf5 g6 (25...Re6 26.Rbf2+=) 26.Qf3 Bh2 27.Kh1 Bd6 28.Rd2 f5 29.Re2 Qd7 (29...Re2 30.Qe2 Qf7 31.Re1+=) 30.Qd5 Kh8? (30...Qf7 31.Qf7 Kf7 32.Rfe1+=) 31.Ne5?? (31.Re8 Re8 32.Ne5 Qe6 33.Qd6 Qd6 34.Nf7 Kg8 35.Nd6 Rd8+–) 31...Qe6? (better 31...Qd8+=) 32.Qe6 Re6 33.Nf7! Rf7 34.Re6 (34.Re6 Rd7 35.g4+–) 1–0. BeepBeepImAJeep (2610) – kika1990 (1705), lichess.org, 2017.

4.Nf3= e5!? =.

4.Nf3= Bg4 5.Nd4+= e6 6.h3 Bh5 7.g4 Bg6 8.Bg2 Bb4? (8...Nf6 9.a3 Bd6+/–) 9.Nf3?? (better is 9.Ne6 fe6 10.Bg7+–) 9...Nf6= 10.0–0 0–0 11.d3 Nbd7 12.a3 Bd6 13.Nc3 Qc7 14.e4 Bf4 15.Ne2= Bd6 16.Qe1 Rad8 17.Rd1 c5 18.Ng3 Ne5 19.Ne5= Be5 20.Be5 Qe5 21.f4 Qd4 22.Qf2 Qf2 23.Rf2 h6 24.Rfd2 b6 25.f5 ef5 26.ef5 Bh7 27.Ne4 Nd7 28.Nc3 Ne5+= 29.Nd5 g6 30.Nf6 Kg7= 31.Nh7 Kh7 32.fg6 Kg6 33.Be4 Kg5 34.Kg2 f6 35.Kg3 Rf7?? 36.h4 1–0. Fournier,Frederic (1960) – tusanca (1990), Active (5/0), 2005.

3.c4 Nf6

4.c5 Bf5 5.e3 e6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5).

4.cd5 cd5 (--> 1.b4 c6 2.c4 d5 3.cd5 cd5 4.Bb2 Nf6).

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

3.d4 Bf5

4.f3 e6–/+ 5.a3 Bd6 6.Nc3? Nf6 7.h4 Bg3 8.Kd2 0–0 9.e3 Nbd7 10.Nge2 Bf4?? 11.Nf4+– b5 12.g4 e5 13.de5 d4 14.ef6 dc3 15.Bc3 Nf6 16.Ke2 Qb6 17.Qc1 Rae8 18.Bd4 Re3?? 19.Be3+– Re8 20.Kf2 c5 21.Bc5 Qc6 22.gf5 a5 23.Be3 Qc3 24.Bb5 Re3 25.Qe3 Qc2 26.Qe2 Ne4 27.fe4 Qc7 28.Nd5 Qb8 29.Rhg1 ab4 30.ab4 Qh2 31.Kf1 Qh3+– 32.Qg2 Qg2 33.Rg2 h5 34.Nf6 Kf8 35.Nh5 Ke7 36.Rg7 Kf8 37.Ra8 Ke7 38.f6 Ke6 39.Ra6 Ke5 40.Rf7 Ke4 41.Re7 Kd4 42.f7 Kc3 43.f8Q Kb4 44.Be2 Kc3 45.Qc8 Kd2 46.Rd6# 1–0. gordiemac – interloper, ChessWorld.net, 2009.

4.Nf3 e6 5.c3 +=.

4.Nf3 f6 5.Nbd2 e5 6.de5 Bb4 7.g3 (7.a3!? Bd2 8.Qd2=) 7...Nd7 8.ef6 Ndf6 9.Ng5 (9.a3 Bc5 10.Nd4 Ne7=) 9...Nh6 10.c3 Bc5 11.Bg2? (11.e3 0–0 12.Nb3 Nfg4–+) 11...0–0?? (better is 11...Bf2 12.Kf2 Nfg4 13.Ke1 Ne3–+ (13...Qg5?! 14.Nf1–+)) 12.0–0–/+ Nfg4 13.Ndf3?? (better is 13.Nh3–/+) 13...Bf2 (13...Nf2!? 14.Rf2 Bf2 15.Kf2 Qb6 16.Ke1 Qb2 17.Qc1–+) 14.Kh1 (14.Rf2 Nf2 15.Qb3 Ne4 16.Ne4 Be4–+) 14...Ne3 15.Qd4 (15.Qb3 Nf1 16.Rf1 Be3–+) 15...Nf1 16.Qf2 Be4 17.Rf1 Bf3 18.ef3?? Qg5–+ 19.Qd4 Nf5 20.Qe5 Rae8 21.Qc7 Ne3 22.h4 Qe7 23.Qe7 Re7 24.Re1 Nf5 25.Re7 Ne7 26.Ba3 Rf7 27.Kh2 Nf5 28.Bh3 g6 29.g4 Nh4 30.Kg3 Rf3 31.Kh4 g5! 32.Kg5 Rh3 33.Kf5 Rc3 34.Bb2 Rf3 35.Kg5 Rf2 36.Be5 Ra2 37.Kf6 Re2 38.Bd6 a5 39.g5 a4 40.g6 hg6 41.Bc5 b5 42.Kg6 Rc2 43.Ba3 d4 44.Kf5 d3 45.Ke4 d2 0–1. Innessa – Djpnola, playchess.de, 2004. (=1.d4 d5 2.b4 c6 3.Bb2 Bf5)

4.Nf3 h6 5.e3 e6 6.c4 Bb4–/+ 7.Nc3 dc4 8.Bc4 Nf6 9.0–0 0–0 10.a3 Be7 11.Ne5 Nbd7 12.Nd7 Qd7 13.Re1 Rfd8 14.Ne2 Bg4 15.Qc1 Be2 16.Be2 Ne4 17.Bf3 Ng5 18.Be2 Rac8 19.h3 c5 20.dc5 Bc5 21.Rd1 Qe7 22.Rd8=+ Qd8 23.Qc3 f6 24.Rd1 Qf8 25.Bc4 Bb6 26.h4 Nf7 27.Qb3 e5? 28.Rd7+– Rc4 29.Qc4 Qe8 30.Rb7 h5 31.Kh2 f5 32.a4 1–0. DanielMena – dixi82, ChessWorld.net, 2007.

4.e3 e6

5.a3 Bd6 6.h3 (6.Nf3 a5=+) 6...Nd7 7.Bd3 Ne7 8.Nf3 f6 9.Nh4 Bd3 10.cd3 Qc7 (Better is 10...0–0!?–/+) 11.Qh5 g6 12.Qe2 e5 (12...a5 13.ba5 Qa5 14.Bc3–/+) 13.Nd2 0–0–0 14.Bc3 g5 15.Nhf3 Nf5 16.Nb3 b6 17.a4 h5 18.de5 Be5 19.Be5 Ne5 20.a5 g4 21.Ne5 fe5 22.hg4 hg4 23.Rh8 Rh8 24.Kd2 Rh2 25.Qg4 Qd7?? 26.ab6 ab6 27.Qg8 Kb7 28.Qa8 1–0. PoPer – gomi, Live Game Caissa's Web, 2004.

5.a3 Nf6 6.Nf3 Nbd7 7.c4 dc4 8.Bc4 Nb6 9.Bb3 Bg4 10.0–0 Be7 11.Nc3 0–0 12.h3 Bf3 13.Qf3 Nbd5 14.e4 Nc3 15.Bc3 Qc7 16.Rfc1 Rfd8 17.d5 ed5 18.ed5 Nd5 19.Bd5 Rd5 20.Bg7 Rad8 21.Bb2 Rg5 22.Qc3 Rd7 23.Qh8 1–0. Wall,Bill – JWM, Microsoft Gaming Zone, 2000.

3.e3 a5

4.a3 Qb6 (--> 3.e3 Qb6 4.a3 a5).

4.ba5 (--> 1.b4 c6 2.Bb2 a5 3.ba5 d5 4.e3).

4.b5 cb5 5.Bb5 Nc6 6.a4 Nf6 7.Nf3 e6 8.0–0 Be7 9.d4 0–0 10.c4 dc4 11.Nbd2 Bd7 12.Nc4 Nb4 13.Bd7 (13.Nfe5 Bb5 14.ab5 Ne4=) 13...Nd7 (13...Qd7? 14.Nb6 Qc6 15.Na8 Ra8 16.Ba3+–) 14.Qb3 Nb6 15.Nce5 (15.Nb6 Qb6 16.Rfc1 Rac8=) 15...Rc8 (15...Qd5 16.Qd1 f6=) 16.Rac1 (16.e4 Qd6=) 16...N6d5 (better 16...Qd5!? 17.Qd1 Qa2 18.Rc8 Rc8–/+ (18...Nc8?! 19.Qe2=)) 17.Rc4 (17.e4 Nf6 18.Ng5 Rc1 19.Rc1 Qb6+=) 17...f6 18.Nd3 (18.Rc8 Qc8 19.Rc1 Qe8=) 18...Rc4 19.Qc4 Nd3 20.Qd3 Qd7 21.Qb3 Rc8 22.g3 (22.Rc1 Bb4=) 22...Nb4 23.Ba3 Qd5 24.Qb2?? (24.Nd2!?=) 24...Rc2 (better 24...Qf3 25.Bb4 Bb4–+) 25.Qb1–/+ Qa2 (worse 25...Qf3 26.Bb4 Rc7 27.Be7 Re7 28.Rc1+–) 26.Bb4 Qb1 (26...Bb4 27.Qa2 Ra2 28.Rc1=+) 27.Rb1=+ Bb4 28.Ra1 Kf7 29.d5 (29.Kg2 Ke7=+) 29...e5 (29...ed5 30.Rd1 Rc5 31.Nd4–/+) 30.e4 (30.Kf1 Ke7–/+) 30...Rc4 31.Rd1 Re4 32.d6 (better 32.Rc1!? Be7 33.Rc7–/+) 32...Ke8–+ 33.d7 (33.Rd5 Kd7–+) 33...Kd8 34.Rd5 Rc4 35.Rb5 (35.h3 Bc3–+) 35...Rc7 (35...Kd7?! 36.Rb7 Rc7 37.Rc7 Kc7 38.h4–+) 36.Nh4 g6 (better 36...Rd7 37.Nf5 Kc7–+) 37.Nf5?? (better 37.Rb6–+) 37...gf5 38.h4 (38.Rb6 Be7–+) 38...Rd7 39.Kg2 (39.Rb6 Ke7–+) 39...Kc7 40.Kf1 (40.f4 Re7–+) 40...b6 41.Ke2 (41.f3 Rd1 42.Kg2 Ra1–+) 41...Bc5 (41...Rd2 42.Kf1–+) 42.f4 (42.Rb2 Rd4 43.Ra2 Rg4–+) 42...ef4 43.gf4 Rd4 44.Kf3 Ra4 45.Rb2 (45.h5 Kc6 46.Rb1 Bd6 47.Rc1 Kd5–+) 45...Rb4 (45...Bd6!? 46.Kg2–+) 46.Rc2 Rd4 (better 46...Kd7 47.h5–+) 47.Kg2 (47.Rg2 a4 48.Rg7 Rd7–+) 47...Kc6 (47...Rf4 48.Kg3 Rg4 49.Kh3–+) 48.h5 (48.Kf3 a4–+) 48...Kd5 (48...Rf4 49.Kg3 Rg4 50.Kf3–+) 49.h6 (49.Kf3 Bd6 50.Kg2 Rf4–+) 49...Bd6 (49...Rf4 50.Kg3 Rg4 51.Kf3–+) 50.Re2 (50.Rc8 Bf4 51.Rh8 Ke4 52.Re8 Be5–+) 50...Re4 (50...Rf4 51.Re1–+) 51.Rb2 Rf4 (better 51...Kc5 52.Rc2 Rc4 53.Re2–+) 52.Rb5 (52.Rb6 Rf2! 53.Kf2 Bc5 54.Ke2 Bb6 55.Kd3 f4 56.Ke2 a4 57.Kf3 a3 58.Kg4 a2 59.Kh4 a1Q 60.Kg4 Qg1 61.Kf3 Qe3 62.Kg4 Qg3 63.Kf5 Qg5) 52...Bc5 53.Rb2 (53.Rb1 a4–+) 53...Rg4 54.Kf3 Ke5 Black plans f4 55.Re2 Re4 56.Rc2 f4 57.Kg4 (57.Kg2–+) 57...Re3 58.Rc4 Rg3 (58...f5 59.Kh4 Be7 60.Kh5 Rh3) 59.Kh5 Rg6 (59...f5 60.Rc3 Rc3 61.Kh4 Be7 62.Kh5 Rh3) 60.Kh4–+ Kd5 (60...f3 61.Kh3 f2 62.Rc1 Rg1 63.Rf1 Rf1 64.Kg2 Rg1 65.Kh2 a4 66.Kh3 f1Q 67.Kh4 Qf4 68.Kh5 Qg4) 61.Rc2 (61.Rf4 Rh6 62.Kg4 b5–+) 61...Rh6 (better 61...f3 62.Kh5–+) 62.Kg4 Rg6 (better 62...Ke4 63.Rc4 Bd4 64.Rc7–+) 63.Kf5 (63.Kf4 a4–+) 63...Kc6 (63...f3 64.Rd2 Bd4 65.Rd1–+) 64.Rd2 (64.Kf4 Rg5–+) 64...Rg5 (64...f3 65.Rd1–+) 65.Ke6 (65.Kf4 b5–+) 65...Re5 (better 65...f3!? 66.Kf6 f2 67.Rf2 Rg6 68.Ke5 Bf2 69.Ke4–+) 66.Kf7 Rd5 67.Re2 f3 68.Kf6 fe2 69.Kg7 (69.Ke6 e1Q 70.Kf7 Qe7 71.Kg8 Rd8) 69...e1Q 70.Kh8 (70.Kh7 Rg5 71.Kh6 Qh4) 70...Qd2 (70...Qe7 71.Kg8 Rd8) 71.Kg7 (71.Kh7 Qc2 72.Kh8 Rd7 73.Kg8 Qh7) 71...Rd7 72.Kg8 (72.Kf6 Qf4 73.Ke6 Re7) 72...Qd6 73.Kh8 Qf8 0–1. BeepBeepImAJeep (2570) – Shakiro (2305), lichess.org, 2016.

4.b5 b6 5.a4 c5 6.c4 Bb7 7.cd5 Bd5 8.Nc3 Bb7 9.Nf3 Nd7 10.Bc4 f6 (10...Ngf6!?=) 11.Qb3 Threatening mate: Bf7 11...Nh6 12.e4 e5 13.0–0 Qc7 14.Nd5 Qd6 15.Bc3 0–0–0 16.Qb2 g5 (16...Nf5 17.Qc2+=) 17.Nf6!+– Qf6 (17...Nf6 Deflection from e5 18.Be5) 18.Ne5 Ne5 19.Be5 Qf4?? (19...Qg6 20.Rac1 Rg8 (20...Qe4?? 21.Be6 Rd7 22.f3 Qa4 23.Bh8+–) 21.Bg8 Ng8=) 20.Be6+– (20.Bh8?! Qe4 21.f3 Qc4=) 20...Rd7 21.Bf4 gf4 22.Qh8 (22.Qh8 Kc7 23.Qf8+–) 1–0. DEFFM – GuestSXJZ, freechess.org, 2020.

4.b5 c5 5.a4 Nf6 6.c4 e6 7.Nf3 Be7 8.Be2 0–0 9.0–0 Nbd7 10.d4 cd4 (10...b6 11.cd5 Nd5 12.Nc3=) 11.Nd4 dc4 12.Nd2 e5 13.N4f3 e4 14.Nd4 Nc5 15.Nc4 Re8 16.Ba3 b6 (better 16...Nd5!?+=) 17.Nc6+– Qc7 18.Rc1 (better 18.Ne7 Re7 19.Qc2+–) 18...Be6?? (better 18...Bf8+=) 19.Nb6!+– Qb6 A deflection 20.Ne7 Eliminates the defender e7 20...Re7 21.Bc5 (21.Rc5?! Rd7 22.Qc2 Rad8+–) 21...Qb7 22.Be7 Qe7 23.Qc2 h5 24.Qc7 (24.Qc5 Qc5 25.Rc5 h4+–) 24...Qa3 (24...Qb4 25.Rb1 Qa4 26.b6+–) 25.b6 Qa4 (25...Nd5 26.Qc6 Rb8+–) 26.b7 Rf8 27.b8Q Rb8 28.Qb8 Kh7 29.Qb5 Qa2 (29...Qb4 30.Ra1+–) 30.Bh5 a4 31.Ra1 Qd2 (31...Qb3 32.Be2+–) 32.Ra4 Bd7 33.Qb4 (33.Qg5 Ba4 34.Bf7 Bd1+–) 33...Qd5 (33...Qb4 34.Rb4 Nh5 35.Re4+–) 34.Bd1 (better 34.Ra5 Qe6+–) 34...Ba4 35.Ba4 Qe5 36.h3 g5 37.Bd1 (37.Bb3 g4 38.Qb7 gh3 39.Qf7 Kh6 40.Qf8 Kh7+–) 37...Kg6 (37...Kg7 38.Bb3 g4 39.Qd4 Qd4 40.ed4 gh3 41.gh3+–) 38.Qd4 Qe6 39.Bg4 (better 39.f3!? g4 40.fg4 Ng8+–) 39...Ng4 40.hg4 Qg4 41.Rb1 f5 (41...Qf5 42.Rb6 f6+–) 42.Rb6 Kh5 (42...Kf7 43.Qd7 Kf8 44.Rb8) 43.Qh8 1–0. BeepBeepImAJeep (2525) – leong1978 (2415), lichess.org, 2017.

4.b5 e6 5.Nf3 Nf6 6.c4 Be7 (6...cb5 7.cb5 Nbd7 8.d4=) 7.Nc3+= 0–0 8.Be2 dc4 9.Bc4 cb5 10.Nb5 a4 11.0–0 Bd7 12.d3 (12.Qe2 Nc6+=) 12...Ra5= 13.Rb1 Bb5 14.Bf6 Bc4 15.Be7 Qe7 16.dc4 Nc6 17.Qc2 Rd8 18.Rb6 e5 19.Rd1 Rd1 20.Qd1 f6 21.Rb5 Ra8 22.h3 Qc7 23.Rd5 Qf7 24.a3 Qe6 25.Rd7 e4 26.Ne1 Ne5 27.Rb7 Qc4 28.Rc7 Qe6 29.Qd4 f5 30.Nc2 Nf7 31.Qc3+/– Qd5 32.Nd4 g6 33.Qb2 Qd8 34.Qb7 Rb8 35.Qa7 Ra8 36.Qc5 Qd6 37.Qc4 Rf8 38.g3+– Qd8 39.Ra7 Qb6 40.Qa4 Rd8 41.Kg2 Qd6 42.Qb3 Rd7 43.Ra8 Kg7 44.Qb2 Kh6 45.Ra5 Ng5 46.Rf5! Nf3 47.Rf4 Nd4 48.ed4 Qd4 49.Qb3 Qd3 50.Qb4 Qd6 51.Re4 Qb4 52.ab4 Rb7 53.Kf3 Kg5 54.Ke3 Kf5 55.Kd3 Rd7 56.Rd4 Rb7 57.Kc4 Ke5 58.f4 Ke6 59.b5 Rc7 60.Kb4 Rb7 61.Rd3 Rb8 62.Ka5 Ra8 63.Kb6 Ra4 64.Kc6 Rc4 65.Kb7 h5 66.h4 1–0. Trokenheim,Marek – Jaskula, email priv, 1997.

4.c3 Qb6 5.Qa4 Nd7 6.d4 Ngf6 7.Nf3 Qc7 8.c4 dc4 9.Bc4 Nb6 10.Qb3 Nc4 11.Qc4 Be6 12.Qc3 Nd5 13.Qd2 Nb4 14.Nc3 Bc4 15.Ne5 Ba6 16.a3 Nd5 17.Nd5 cd5 18.Rc1 Qd8 19.Qc2 e6 20.Qa4 b5 21.Qc2 Rc8 22.Nc6? Qb6 23.e4–/+ Bd6 24.ed5 0–0 25.Qe4 ed5 26.Qd5 Rfe8 27.Kd1 Bf8 28.Qf3 b4 29.ab4 ab4 30.d5? Be2–+ 31.Qe2 Re2 32.Ke2 Re8 33.Kf3 Qb5 (34.Kg3 Qd5–+) 0–1. Vesson,Eric – Arevalo,Ricardo, Saint Quentin opB, 1999.

4.a3 ab4 5.ab4 Ra1

6.Ba1 Qb6 7.b5 Nf6 8.c4 Bf5 9.Nc3 e6 10.Nf3 Nbd7 11.bc6 bc6 12.Nd4 (12.Nh4 Bg6=) 12...Bg6 13.Qa4 c5 14.Ndb5 Qb7 15.cd5 ed5 (< 15...Nd5 16.Nd5 ed5 17.Bg7+/–) 16.Qa5 Be7 17.Nc7 Kf8 18.Ba6 (18.d3 Ne5 19.N7d5 Nd5 20.Nd5 Nd3 21.Bd3 Qd5= (21...Bd3? 22.Qc3+–)) 18...Qb6 19.Qb6 Nb6 20.0–0 Bd8 (20...Bf5 21.Bb7 Bd3 22.Rc1+= (22.N7d5?! Nbd5 23.Nd5 Bf1 24.Kf1 Nd5 25.Bd5 h5=)) 21.N3b5= Ne4 22.d3 Nd2 23.Rd1 Nb3 24.Bb2 Na4 25.Be5+= d4 26.ed4 cd4 27.Bd6 Be7?? 28.Re1+– h5 29.Re7 Kg8 30.Be5 Kh7 31.Nd4 Nd4 32.Bd4 Rd8 33.Be3 Bd3 34.Bd3 Rd3 35.h3 Kg6 36.Nb5 Nb2 37.Nd4 Nc4 38.Nf3 f6 39.Nh4 Kh7 40.Nf5 (40.Nf5 Kg6 41.g4 hg4 42.hg4+–) 1–0. Bianchi,Guillermo (2355) – Sorin,Ariel (2250), Buenos Aires, 1985.

6.Ba1 Qb6 7.b5 Nf6 8.Nf3 Bf5 (8...Bg4 9.c4=) 9.Be2+= e6 10.0–0 Be7 11.Nh4 Bg6 12.Ng6 hg6 13.bc6 bc6 14.c4 Nbd7 15.d4 Ne4 16.Nd2 Nd2 17.Qd2 f5 (17...Qb3 18.c5+=) 18.Bc3 Qb8 19.g3 g5 20.Qc2 Kf7 (20...g4 21.Ra1+=) 21.c5 Nf6 22.f3 g6 23.Rb1 Qf8 24.Rb6 g4 25.f4 Ne4 26.Bd3 Nc3 27.Qc3 g5 28.Rc6+– gf4 29.ef4 Qh6 30.Qb2 Bf6 31.Qb7 Kg6 32.h4 gh3 33.Re6 h2 34.Kh1 Qh5 35.Be2 Qh3 36.Rf6 Kf6 37.Qc6 Kg7 38.Qd7 ½–½. Muri,H – Terpstra,W, corr ICCF EU/M/GT/233 (year?).

6.Ba1 Qb6 7.c3 (--> 1.b4 c6 2.Bb2 a5 3.a3 ab4 4.ab4 Ra1 5.Ba1 Qb6 6.c3 d5 7.e3).

6.Ba1 e6 7.Nf3 Nf6 (7...Bb4?? 8.Bg7 Nf6 9.Bh8+–) 8.d4 (better is 8.b5!?=) 8...Bb4–/+ 9.c3 0–1. Fournier,Frederic – Joie,Sebastien, Active, 1999.

4.b5 Qb6

5.a4 Nf6 6.c4 Bg4 7.f3 Bf5 8.d4 e5 9.cd5 (9.c5!? Qd8 10.Nd2=) 9...cd5 (< 9...Nd5 10.e4 Ne3 11.Qd3 ed4 12.ef5 Bb4 13.Kf2+/–) 10.Nd2 (< 10.de5 Qe3 11.Be2 Bb4 12.Kf1 Bc5–/+) 10...Bb4 11.Be2 e4 12.f4 h5 (12...0–0!?=+) 13.Ba3= Ba3 14.Ra3 Nbd7 15.Rc3 Qd6 16.Qb3 0–0 17.Bd1 Rac8 18.Ne2 Nb6 19.Rc8 Rc8 20.h3 h4 21.Nc3 Qc7 22.Na2 Nc4 23.Be2 g5 24.Rf1= g4 25.hg4 Bg4 26.Bc4 dc4 27.Qc2 c3 28.Nb3 Be6 29.Nbc1 Ng4–/+ 30.Qe4 Ba2 31.Na2= Qc4 32.Nc1 c2?? 33.f5+/– Qc3 34.Ke2 Nf6 35.Qh4 Re8 36.Rf3 Ne4= 37.Rg3 Kf8 38.Qh6 Ke7 39.Rg4 Qd2 40.Kf3 Nf6 41.Rg7 Qc1 42.Rf7 Kf7 43.Qg6 Ke7 44.Qg7 Kd8 45.Qf6 Kc8 (45...Kc8 46.Kg3 Qe3 47.Kh2 c1Q 48.Qe6 Re6 49.g3 Rh6 50.Kg2 Qh1#) 0–1. Karanda,Konstantin (2195) – Pavlov,Sergey1 (2350), Kiev Independence Cup 4th, 2004.

4.b5 Nd7

5.a4 e5 6.d4 e4=.

5.a4 e5 6.Nf3 Bd6=+ 7.c4 Qe7 8.cd5 (8.d4 e4 9.Nfd2 Bb4=) 8...cd5 9.Be2 (9.d4 e4 10.Nfd2 Nb6=) 9...Ngf6 10.d4 (10.Nc3 Nb6=) 10...e4 11.Nfd2 0–0 12.0–0 (12.Ba3 Ba3 13.Ra3 Nb6=) 12...Re8 (12...Nb6 13.Ba3=) 13.Nc3 (13.Ba3 Ba3 14.Ra3 Nb6=) 13...Nb6=+ 14.h3 (14.Rc1 Be6=+) 14...h6 (14...Be6 15.Rc1=+) 15.f4 (15.Rc1 Bf5=+) 15...ef3 16.Rf3 Bd7 (16...Nh7 17.e4 Ng5 18.e5 Nf3 19.Bf3–/+) 17.Qb3 Be6 18.Raf1 (18.Bd3 Ne4 19.Rd1 Rad8–/+) 18...Ne4! 19.Qd1 (19.Nce4 de4 Combination; 19.Nde4 de4 Combination) 19...Nd2 (better 19...Ng5!?–+) 20.Qd2=+ Bb4 (20...Rac8 21.Qd1=+) 21.Qd1–/+ Rac8 22.Na2 (22.Nb1 Nc4 23.Bc1 b6=+) 22...Nc4–/+ 23.Ba1 (23.Bc1 Bd6=+) 23...Na3 (better 23...Nd2–+) 24.Nb4= Qb4 25.Bd3 Nc4 26.R1f2 Nb6 27.Bf5? (27.Bc2!?=+) 27...Na4 (27...Bf5 28.Rf5 Nc4 (28...Na4 29.Rf7 b6 30.Qg4 Qb1 31.Kh2+–) 29.Rf7 Ne3–/+) 28.Be6 fe6 (worse 28...Re6 29.Rf7 Nb6 30.Rb7 Qb5 31.e4=) 29.Rf5?? (29.Rf7 Qb5 30.Qh5 Qb1 31.Rf1=) 29…ef5–+ 0–1. GuestZSWT – GuestPKKT, freechess.org, 2016.

5.a4 e5 6.Nf3 Bd6=+ 7.c4 Ngf6 8.d4 e4 9.Nfd2=.

5.a4 e5 6.Nf3 Bd6 7.Be2 Ngf6 8.c4 Qe7 (8...e4 9.Nd4=+) 9.d4 e4 (9...dc4 10.0–0=+) 10.Nfd2= 0–0 11.c5 Bb8 12.0–0 Re8 13.Nc3 Nf8 14.Re1 Bf5 15.Qb3 Qc7 16.Nf1 h5 (16...Bg4 17.Bg4 Ng4 18.Rab1=) 17.bc6 bc6 18.Rab1 h4 19.Ba3 Bg4 0–1. DEFFM – GuestDNXH, freechess.org, 2018.

5.a4 Ngf6 6.Nf3 e6 7.c4 dc4 8.Bc4 Nb6 9.Be2 Bd7 10.Nc3 Bd6 11.Qc2 0–0 12.Ne4 Ne4 13.Qe4 Nd5 14.Qg4 (14.Qd4 Qf6=) 14...e5 15.Ne5?? (better 15.Qg3 f6 16.Bc4=) 15…Bg4–+ (15...Bg4 16.Ng4 Qe7–+) 0–1. GuestKPWS – GuestTMQP, freechess.org, 2017.

5.Nf3 Ngf6 6.a4 (6.Be2 Qc7=) 6...e6 7.Be2 Bd6 8.d4 0–0 9.0–0 Re8 10.Ne5 Nf8 (10...Qc7 11.f4=) 11.Nd2 (11.Ba3 Be5 12.de5 N6d7+=) 11...c5 12.c4 Ne4 (12...N8d7 13.Ndf3+=) 13.Nb3 (13.Ne4 de4 14.dc5 Bc5+=) 13...f6 14.f3 fe5 15.de5 Be7 16.fe4 dc4 17.Nd2 Qc7 18.Nc4 Rd8 19.Qb3 (19.b6 Qb8 20.Qc2 Ra6+–) 19...b6+/– 20.Bh5 Bb7 21.Nd6 Bd6 22.ed6 Qd6 23.Rf7 Rd7+/– 24.Raf1 Ng6?? 25.Bg6 hg6 26.Be5 Qe5 27.Rd7 Be4 28.Qd1 Bd5 29.Rff7 Qe3+= 30.Kh1 Qc3 31.Rg7 Qg7= 32.Rg7 Kg7 33.Qa1 Kf7 34.Qe5 Ra7 35.h4 Rb7 36.Qh8 Re7 37.Qe5 Rb7 38.Kh2 Kg8 39.Qf6 Kh7 40.g4 c4 41.g5 Rc7 42.Qf8 (42.Qf8 Rg7 43.Qf2=; better is 42.h5!? Rg7 43.hg6 Rg6 44.Qd8+/–) 1–0. Schuehler,Ernst – Terpstra,W, corr ICCF EU/M/GT/233 (year?).

4.b5 Bf5

5.bc6 Nc6 6.Nf3 Nf6 7.Bb5 Rc8 8.0–0 e6 9.h3 Bd6 10.Nh4 Bg6 11.Ng6 fg6 12.c4 0–0 13.cd5 Nd5 14.Nc3 Nc3 15.Bc3 Nb4 (15...Bc7 16.f4+=) 16.Qb3+= Nd5 17.Bc4 Rf7 18.a4 Rc6 (< 18...Nc3 19.Be6 Ne2 20.Kh1+/–) 19.Bd4 Bb8 20.d3 Qd6 21.g3 Rf3 22.Qb2 Qe7 23.Rab1 Nb4 24.Bc3 Bd6 25.Kg2 Rf8 26.f4 Rfc8 27.Qb3 Kh8 28.Bd2 Bc5 29.Rf3 Rb6 30.Bb5 Nc6 31.Bc3 Bb4 32.Bb2 Na7 33.Bc4 Bc5 34.Qc3 Rb4 35.Qc2 Rb6 36.Ba1 Rb1 37.Qb1 Nc6 38.d4 Bb4 39.Qe4 Nd8 40.d5 Nf7 41.Bb3 ed5 42.Qd5 Nd6+= 43.Be5 Rd8 44.e4 Nc8 45.Qe6 Qe6 46.Be6 Nb6 47.Bb3 Rd2 48.Kf1 h6 49.Bc3 Bc3 50.Rc3 Rd8 51.e5+– Rc8 52.Rd3 (52.Rd3 Kh7 53.Ke2+–) 1–0. Lins,Thomas – Pietruske,Siegfried, corr GER jub50 qJVM48, 1996.

5.Nf3 e6 +=.

5.g4 Bg6 6.h4 h6 7.Nf3 Nd7 8.bc6 bc6 9.c4 e6 10.cd5 cd5 (10...ed5 11.h5 Bh7 12.Nc3=+) 11.Bb5 Ngf6 12.Ne5 Bd6 13.Bd7 Nd7 14.Ng6 fg6 15.Bg7 Rh7 16.Bc3 Rc8 17.Qc2 Rg7 18.Rh3 Ne5 19.Qa4 Qd7 20.Qd7 (< 20.Qa5 Qc6 21.Be5 Qc1 22.Ke2 Be5–+) 20...Rd7 21.g5 h5 22.Ke2 Rb7 23.a4 Kd7 24.f4 Nc4 25.d3 Nb2 26.Rh1 Rb3 27.Ra2 Bb4 28.Rc1 Rc6 29.Rb2 Rcc3= 30.Nc3 Rb2 31.Kf3 Bc3 32.Rc3 Rb4 33.Ra3 Kc6 34.d4 Rc4 35.Ke2 Rb4 36.Kd3 Kd7 37.Kc2 ½–½. Woelfelschneider,Peter – Hanke, 2009.

3.e3 a6

4.a3 Nf6 =.

4.c4 e6 5.cd5 ed5 6.Nf3 Nd7 7.Be2 Ngf6 8.a3 Bd6 9.d4 0–0 10.0–0 Ne4 11.Bd3 f5 12.Ne5 Qe7=+ 13.Nd7 Bd7 14.f3 Qh4–/+ The mate threat is Qxh2 15.f4 g5 16.Be4 fe4–/+ 17.g3 Qh3 18.Qe2 Bg4 19.Qg2 Qh5 20.Rf2? Bh3 21.Qh1 Qd1 (22.Rf1 Qf1#) 0–1. Rohrbacher,Walter – Oser,Thor, Baden–ch SN Karlsruhe, 2003.

4.c4 Nf6 5.Nf3 =.

4.f4 Bf5 5.Nf3 h6 6.Be2 e6 7.0–0 Be7 8.d3 Nd7 9.Nbd2 Ngf6 10.a3 0–0 11.c4 b6 12.Qb3 dc4 13.dc4 Rb8 14.Nd4 Qc7 15.Bf3 c5 16.Nc6 Rbe8 17.e4 cb4?? 18.ab4?? Bh7?? 19.e5+– Ng4 20.Ne7 Re7 21.Bg4 f5 22.Bf3 g5 23.g3 g4 24.Bg2 h5 25.Ra6 h4 26.Bd4 h3 27.Bh1 Qc8 28.Rfa1 Nb8 29.Ra8 Qc7 30.R8a7 (30...Qa7 31.Ra7 Ra7 32.Bb6+–; better is 30.Qe3 Qd7 31.Bb6 Rc8+–) 1–0. SOULESSNURSE – shooin, Live Game Caissa's Web, 2005.

4.f4 Nf6 5.Nf3 =.

3.e3 b5

4.a3 Bf5 5.Nf3 (5.a4 ba4 6.Ra4 f6+=) 5...Be4 (5...a5 6.a4 ab4 7.ab5 Ra1 8.Ba1=) 6.Be2 (6.a4 ba4 7.Ra4 Nf6+=) 6...Nf6 7.0–0 e6 8.d3 Bf3 9.Bf3 Be7 (9...a5 10.ba5 Bd6 11.a4=) 10.Nd2 (10.c4 a5=) 10...0–0 11.c4 bc4 (11...a5 12.Bc3=) 12.dc4+= dc4 (12...a5!? 13.Qa4 Nbd7 14.Qc6 Rc8+=) 13.Nc4+– Nbd7 (13...Nd5!?+–) 14.Na5+– Nb6? (better 14...c5+–) 15.Nc6 (15.Bc6?! Qd1 16.Rfd1 Rac8+–) 15...Qd1 (15...Qe8+–) 16.Ne7 (16.Bd1?! Nfd5+–) 16...Kh8 17.Rfd1 1–0. BeepBeepImAJeep (2630) – lchuza_otro (1605), lichess.org, 2017.

4.a4 a5 5.ab5 Qb6 6.ba5 1–0. Trkn – butchinnevada, itsyourturn.com, 2001.

4.a4 Bb7 5.ab5 cb5 6.Bb5 Nc6 7.Nf3 Qb6? (7...a6 8.Ba4 Nf6 9.Ne5+–) 8.Nd4 (8.Ba4 f6 9.Nc3 Rd8+–) 8...e5? (8...a6 9.Ba4 Nf6+–) 9.Bc6 (9.Ra6 Ba6 10.Bc6 Kd8 11.Ba8 ed4 12.Bd4 Qg6+–) 9...Bc6 10.Nc6 Qc6 11.Be5 Nf6 (11...f6 12.b5! Qb5 13.Nc3+–) 12.b5! Qe6 (12...Qb5 13.Bf6 Combination) 13.Bf6 Qf6 14.Nc3 Bd6 (14...Rd8 15.Ra7 Bc5 16.Rc7+–) 15.b6 (better 15.Nd5!? Qg6 16.0–0 Qe4+–) 15...0–0 16.ba7 d4 (16...Qe7 17.Nd5 Qb7 18.c4+–) 17.Ne4 Qe5 18.Nd6 Qd6 19.0–0 d3 (19...Qc7 20.ed4 Ra7 21.Ra7 Qa7 22.Qa1+–) 20.cd3 Qd3 21.Ra2 Rfd8 (21...f6 22.Qa4 Rf7 23.Qc6+–) 22.Qa4 Qe2 (22...Rdc8 23.Rb2+–) 23.d4 Qg4 24.Qc6 (24.Rc1 h6 25.Rac2 Qe4+–) 24...Qf5 (24...g6 25.Qb7+–) 25.Qb7 h6 (25...Qc8 26.Rb1 g6 27.Ra5+–) 26.Rb1 Qe6 (26...g6 27.Rc1+–) 27.Rab2 Qc4 (27...Kh7+–) 28.Qa8! (28.Qa8 Ra8 29.Rb8 Rb8 30.ab8Q (30.ab8N?! Qc2 31.Re1 Qc3=; 30.ab8B?! Qa2 31.Rf1 Qb2=; 30.Rb8?! Kh7 31.g3 Qc1 32.Kg2 Qc6 33.f3 Qc2 34.Kh3 Qf5 35.Kg2 Qc2 36.Kf1 Qd1 37.Kf2 Qd2 38.Kf1 Qd1 39.Kf2 Qd2 40.Kf1 Qd1=) 30...Kh7 31.g3+–) 1–0. onur604 (2320) – denaris (1970), lichess.org, 2020.

4.Nf3 Nd7 5.a4 ba4 6.Ra4 f6 7.Nd4 Nb6 8.Nc6 Qd7 (8...Qc7 9.Ra5 e5+= (9...Qc6?? 10.Bb5 Qb5 11.Rb5+–)) 9.Ra5+/– Nc4 10.Bc4 dc4 11.b5 e5 12.Qh5 g6 13.Qf3 Bb7 14.Nc3 (14.Ba3!?+/–) 14...Bb4 15.Ra1 f5? (better is 15...Bc3 16.Bc3 a6+=) 16.Qd5 Bc3 17.Qd7 Kd7 18.Bc3 Bc6 19.bc6 Kd6 (19...Ke6 20.c7 Ne7 21.Ra6 Kd7 22.Be5+–) 20.Ra5 Re8 21.f4 (worse is 21.Ra7 Ne7 22.Bb4 Ke6+–) 21...Nh6 22.fe5 (better is 22.Be5 Re5 23.fe5 Kc6+–) 22...Kc6 23.Ke2 Re7 24.Ra6 Kb7 25.Rha1 Ra8 26.Bd4 Kb8 27.e6 Ng8 28.e4! fe4 29.Bc5 Rb7 (29...Rc7 30.Bd6 Kb7 31.Bc7 Kc7+–) 30.Bd6 Kc8 31.Rc6 Kd8 32.Rf1 Re7 33.Rf8 Re8 34.Bc7 Ke7 (34...Kc8 35.Re8 Kb7 36.Ra8 Ka8+–) 35.Rf7. Fournier,Frederic (1720) – Jfrandon, Active (8+2), 2007.

4.Nf3 e6 5.Be2 Nf6 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+–) 6.0–0 (6.a4!?=) 6...Bb4+= 7.d3 0–0 8.c4 Nbd7 9.cb5 cb5 10.Qb3 Be7 11.Qb5?? (better is 11.Rc1–/+) 11...Rb8–+ 12.Qa4 Rb2 13.Nc3 Qb6 (13...Bb4!? 14.Nd1 Nb6 15.Qa7 Re2 16.Nd4–+) 14.Rab1 Nc5 15.Qa3 Rb1 16.Rb1 Qc7 (16...Qa6!? 17.Qc1 Qa5 18.Qc2–+) 17.Nb5 Qb7 18.Qa7 Qa7 19.Na7 Ba6 20.Nc6 Bd6 21.Nce5 Rb8 22.Rb8 Bb8 23.Kf1 (23.Bf1 Na4–+) 23...Nfd7 (23...Na4!? 24.g4–+) 24.Nd7 Nd7 25.g3 Bd6 26.d4 Be2 27.Ke2 Nb6 28.Nd2 Na4 29.Kd3 g5 30.Kc2 h5 31.Kb3 Nb6 32.a4 Bc7 33.a5 (33.Kb4 Kf8–+) 33...Nc8 (33...Nc4 34.Nc4 dc4 35.Kc4 Ba5 36.f4–+) 34.Ka4 Na7 35.Nb3 Kf8 36.h3 f5 37.f4 (37.Kb4 Ke7–+) 37...gf4 (better is 37...h4!? 38.gh4 gf4 39.ef4 Bf4 40.Kb4–+) 38.gf4–/+ Ke8 39.Nc5 Ke7 40.Nd3 Kd6 41.Ne5? Nc6 42.Nf7 Kd7 43.a6–/+ Kc8 44.Kb5 Nd8?? 45.Nd8= Bd8 46.Kc6 Kb8 47.Kd7 Bh4 48.Ke6 Bf2 49.Kd5 Be3 50.Ke5 Ka7 51.d5 Ka6= 52.Kf5 Kb6 53.Ke5 Kc7 54.f5 Bc5 55.Ke6 Bd6?? 56.f6?? Bf8?? 57.Kf7+– Bd6 58.Kg6 h4 59.Kg5 Bf8 60.Kh4 Kd6 61.Kg5 Kd5 62.h4?? Ke6 63.Kg6 Ke5 64.h5 Ke6 65.h6 ½–½. Hal1958 – Dutchin, playchess.de, 2003.

4.Nf3 Be6 5.Be2 (5.a4 ba4 6.Ra4 Nf6+=) 5...Bf5 (5...a5 6.a4 ab4 7.ab5 Ra1 8.Ba1+=) 6.0–0 (6.a4 Qd6+=) 6...e6 (6...Qd6 7.a3+=) 7.d3 (better is 7.a4+/–) 7...Bb4?? (better is 7...Nf6=) 8.Bg7+– f6 (8...Nd7 9.Bh8 Qc7 10.Nbd2+–) 9.Bh8 h6 (9...e5 10.d4 e4 11.Nh4+–) 10.Nd4 Qe7 11.Bh5 Kd7 12.Nf5 ef5 13.Qf3 Qe5 14.d4 Qe7 15.Qf5 Kc7 16.a3 Bd6 17.Re1 Qf8 18.e4 Ne7 19.Qf6 Nd7 20.Qf8 Rf8 21.Bg7 Rg8 22.Bh6 Rh8 23.e5 Rh6 24.ed6 Kd6 25.g4 Nb6 26.Nd2 Nd7 27.f4 Rh8 28.f5 a5 29.Re6 Kc7 30.Re7 Kd8 31.Rae1 Nf6 32.Nb3 Rg8 33.h3 Kc8 34.Bg6 Rh8 35.Kg2 Rd8 36.R1e6 Rf8 37.Rc6 Kd8 38.Ra7 Nd7 39.Rd6 Rf6 40.Rdd7 (40...Kc8 41.Rdc7 Kb8 42.Nc5 Rd6 43.Rcb7 Kc8 44.Ra8#) 1–0. Vandenburg,V – Stone,Ri, Lansing–ch MI op–B, 1993.

4.Nf3 f6 5.a4 e5 6.ab5 Bb4 7.Bc3 =.

4.Nf3 Nf6 5.Be2 e6 6.a3 a5 7.c3 g6 (7...Bd6!?=) 8.0–0+= Bg7 9.d4 Nbd7 10.Nbd2 Qc7 11.Qc2 e5 12.de5 Ne5 13.Ne5 Qe5 14.c4 Qd6 (14...Qb8 15.cd5 cd5 16.Be5+/–) 15.cb5+– Bf5? (better is 15...cb5 16.Bb5 Ke7+–) 16.Qc6 Ke7 17.Qd6 Kd6 18.Rac1 (18.g4 Bd7 19.ba5 Ra5+–) 18...Bd7? (better is 18...ab4 19.Rc6 Ke7+–) 19.Rfd1 ab4 20.ab4 (better is 20.Nc4 Ke6 21.Nb6 ba3 22.Bf6 Kf6 23.Nd7 Ke6 24.Nb6+–) 20...Ra4?? (20...Ke7+–) 21.Nc4 (better is 21.Bf6 Bf6 22.Nc4 Ke6+–) 21...Ke6 22.Nb6 Rb4 (22...Ra7 23.Nd5! Nd5 24.Bg7+–) 23.Bc3 (23.Bf6 Bf6 24.Nd5 Rh4+–) 23...Rb3 (23...Bb5 24.Bb4 Be2 25.Rc6 Kf5+–) 24.Bf6 Bf6 (24...Kf6 25.Nd7 Ke7 26.Nb6+–) 25.Bg4 (25.Bg4 Ke7 26.Nd5 Kf8 27.Bd7+–) 1–0. mr5reasons1 (1610) – vl007 (1715), gameknot.com, 2013.

4.a4 ba4

5.Ra4 Bd7 +=.

5.Ra4 Nf6 6.Nf3 +=.

5.c4 e6 6.cd5 (6.Qa4 Nf6=) 6...ed5= 7.Qa4 Bd7 (7...Nf6 8.Nf3=) 8.Be2 (8.Nf3 c5 9.b5 Nf6+=) 8...Nf6 9.Nf3 Bd6 (9...Qb6 10.Bf6 gf6 11.b5+=) 10.0–0 c5 (10...Qe7 11.b5+=) 11.b5+= 0–0 12.Bf6 (12.Nc3 Re8+=) 12...Qf6= 13.Nc3 Qe6 (13...Be6!?+=) 14.Qa2 c4 15.Nd4 Qe5 (better 15...Qe8+–) 16.f4 Qe8 17.Bf3 a5 18.Bd5 (18.Nd5 c3+–) 18...Ra7 19.Qc4 Bb4 (19...Qd8 20.Rfb1+–) 20.Qd3 (20.Rfb1 Qd8+–) 20...Bc3 (20...Bg4 21.Be4+–) 21.Qc3 Bb5 (21...Qe7+–) 22.Nf5 (22.Nf5 Qe3 23.de3 Bf1 24.Qg7; 22.Nb5?! Qb5 23.e4 a4+–) 1–0. DEFFM – GuestLRMW, freechess.org, 2018.

5.c4 Nf6 6.Nf3=.

5.Nf3 e6 6.c4 f6 (6...dc4 7.Bc4 Nf6 8.Qa4=) 7.Qa4+= Bd7 (7...Ne7 8.Nc3+=) 8.c5 e5 (8...Be7 9.d4+–) 9.Be2 e4 (9...Nh6 10.0–0+–) 10.Nd4+– f5 11.Bh5 g6 12.Nc6 (12.Be2 Nf6+–) 12...Bc6 13.b5 Bd7 14.Bh8 Qg5 (14...gh5 15.c6 Bc8 16.Be5+–) 15.0–0 1–0. DEFFM – GuestDBVL, freechess.org, 2018.

4.a4 a6

5.ab5 cb5 6.Bb5 Bd7 7.Be2 e6 8.Nf3 Bb4?? (better is 8...Qb6+/–) 9.Bg7+– f6 10.Bh8 Kf7 (10...Nh6 11.c3 Bd6 12.Qc2+–) 11.Ne5! Kf8 (11...fe5 12.Bh5 Double attack (12.Bh5 Decoy)) 12.Nd7 Nd7 (12...Qd7 13.c4+–) 13.Ra6 Ra6 14.Ba6 Nh6 15.Qh5 Nf7 (15...Kg8 16.Qh6 Kh8 17.0–0+–) 16.Qh7 Ng5 (16...Bd6 17.Bg7 Ke7 18.Be2+–) 17.Qg7 Ke8 18.Bb5 Be7 (18...Ne4 19.c4+–) 19.Bd3 (better is 19.Qg8 Bf8 20.Bg7 Ke7 21.Bd7 Bg7 22.Qg7 Nf7+–) 19...Nf8 20.h4 Nf7 (20...Qb6 21.Nc3 Ne4 22.Be4 de4 23.Qg4+–) 21.Bg6 (better is 21.Bb5!? Nd7+–) 21...Ng6 22.Qg6 Bf8 (22...Kf8 23.Bg7 Ke8 24.h5+–) 23.Bf6 Qb6 24.0–0 e5 (24...Be7 25.Qg8 Bf8 26.Nc3+–) 25.Qf5 (25.Nc3!? Qb7+–) 25...Qc7 (25...Qc6 26.Nc3 Be7 27.Be7 Ke7 28.f4+–) 26.Nc3 (26.Nc3 Qd7 27.Qd7 Kd7 28.Nd5+–) 1–0. mikebaldini (1660) – keithone (1660), gameknot.com, 2015.

5.ab5 cb5 6.Bb5 Bd7 7.Be2 e6 8.f4 Ne7? 9.b5!+– a5 (9...ab5 10.Ra8 Pinning (10.Ra8 Deflection); 9...Bb5 10.Bb5 Double attack) 10.Nf3 Qb6 11.Nc3 Rg8 (11...Nf5 12.Bd3 Bb4 13.Qe2+–) 12.0–0 h6 13.Bd3 Nc8 (13...Bc8 14.Na4 Qb7 15.Rb1+–) 14.Ne5 (14.f5 ef5 15.Nd5 Qb7+–) 14...Nd6 (14...Qc7 15.Na4+–) 15.f5! Bb5 (15...Nf5 16.Bf5 Combination; 15...ef5 16.Nd5 Deflection) 16.Nb5 Nb5 (16...Nf5 17.Bd4 Nd4 18.Nd4+–) 17.Qh5 Nd6 (17...g6 18.fe6 Qe6 19.Bb5 Kd8 20.Qh4 Be7 21.Nf7 Kc8 22.Qh6+–) 18.Bd4 Qc7 19.fe6 g6 20.ef7 Nf7 21.Bg6 Rg7 22.Bf7 Kd8 23.Bd5 Bd6 24.Qh6 Be5 25.Rf8 Ke7 26.Bc5! Kd7 (26...Qc5 27.Qe6) 27.Qe6 1–0. Janek – Frederico, internet, 2018.

4.a4 Ba6

5.ab5 cb5?? 6.Nf3 (better 6.Ra6 Qd7 7.Nc3 Na6 8.Bb5 Nb4 9.Bd7 Kd7+–) 6...f6? (6...Qb6 7.Bd4 Qb7 8.Nc3+–) 7.Nd4 (better 7.Ra6 Na6 8.Bb5 Kf7 9.Ba6+–) 7...e5 8.Nb5 Qb6? (8...Ne7+–) 9.Nc7 (better 9.N1c3 Ne7 10.d4 ed4 11.Na4+– (11.ed4?! Kf7+–; 11.Qd4?! Qd4 12.Nd4 Bf1 13.Rf1 Nbc6+–)) 9...Qc7+– 10.Ba6 Bb4 (10...Na6 11.Ra6 Bb4+–) 11.c3 (better 11.Bb5 Kf7 12.0–0+–) 11...Ba5?? (better 11...Na6 12.Qa4 Qd7 13.cb4 Nc7+=) 12.Bb5 (12.Qa4 Kf7 13.Qa5 Qa5 14.Ra5 Na6 15.Ra6 Rb8 16.Ra7 Ne7+–) 12...Kf8? (12...Kf7 13.Qa4 Bb6 14.c4+–) 13.Ba3 (13.Qb3 Ne7 14.Ba3 Qd8 15.Be7 Ke7 16.Qa3 Qd6 17.Qa5 Nd7+–) 13...Ne7 (13...Kf7 14.Qf3 Qd8+–) 14.Qh5 (better 14.Qb3 a6 15.Qd5 ab5 16.Qa8+–) 14...a6?? (better 14...Nbc6+–) 15.Qe8 1–0. GuestPKVH – guestfh, freechess.org, 2017.

5.ab5 Bb5 6.Bb5 cb5 7.Nc3 a6 8.Nb5 Nc6 9.Nd4 (9.Na3 Nb4 10.Qg4 e6=) 9...Nb4= 10.Ngf3 Rc8 (10...Qc7 11.0–0+=) 11.0–0 (11.Ne5 Qc7 12.c4 Nf6 13.Qa4 Nd7 14.Nd7 Qd7 15.Qb4 e5+–) 11...Nf6 (11...Qb6 12.Rb1 Qc7 13.c3+–) 12.c3 (12.Ne5 Qc7 13.f4 A) 13...Nc2?? 14.Nc2 (14.Ra6?! Qb7 15.Ra2 Nd4 16.Bd4 Qb4+–) 14...Qb7 15.Nd4+–; B) 13...Nd7+–) 12...Nd3 13.Ba3 e6 (13...Nd7 14.Qc2 N7c5 15.Bc5 Nc5 16.Nb3+–) 14.Bf8 Kf8 15.Ra6 e5 16.Nc6 Qd6? (16...Qe8 17.Nb4 Nc5 18.Ra7+–) 17.Qa1?? (better 17.Nb4 Qe7 18.Nd3+–) 17...Rc6+– 18.Ra8 Ne8 19.Rb1?? (19.Re8 Ke8 20.Qa8 Ke7 21.Qh8 Qg6+–) 19...g6?? (19...Qc5 20.Rb7 Rc8 21.Ng5=+) 20.Rbb8?? (better 20.Re8 Ke8 21.Qa8 Ke7 22.Qh8+=) 20...Qd7?? (better 20...Ke7–/+) 21.Re8+– Qe8 22.Re8 Ke8 23.Qa8 Ke7 24.Qc6 f6 (24...Rd8 25.c4 dc4 26.Qc4+–) 25.Qd5 (better 25.Qc7 Kf8+–) 25...Rb8 (25...Rd8 26.Qc4+–) 26.h3 (26.Qd3 Rb2+–) 26...Nc1 (26...Rd8 27.Qc4 Rd7+–) 27.Qc5 (better 27.Ne5 Ne2 28.Kh2 fe5 29.Qe5 Kf7 30.Qb8 h5+–) 27...Ke6 (27...Kd7 28.Qa7 Kc8 29.Qh7 Rb6+–) 28.Qc6 Kf5 29.g4 1–0. DEFFM – GuestLXJF, freechess.org, 2016.

4.a4 Bd7

5.ab5 cb5 6.Nc3 Nf6+/–.

5.Nc3 Qb6 6.ab5+/– d4 (better is 6...Nf6!? 7.Na4 Qc7+/–) 7.Na4+– Qb7 (7...Qc7 8.ed4 e6 9.Nc5+–) 8.Nc5 Qc7 (8...Qc8 9.Nd7 Qd7 10.Bd4+–) 9.Nd7 (9.Bd4 cb5 10.Qf3 Bc6 11.Bb5 Qb6 12.Bc6 Qc6+–) 9...Qd7 10.bc6 Nc6 11.b5 de3 12.bc6 The passed pawn on c6 will quickly become a dangerous weapon 12...ef2 13.Kf2 Qc6 14.Qf3 Qb6 15.d4 Rc8 16.Qb3?? (better is 16.Qf5 Rb8 17.Rb1+–) 16...Qb3= 17.cb3 Rc2 18.Kf3 Rb2 19.Bc4 (< 19.Ra7 Rb3 20.Ke2 e6–/+) 19...e6 20.Ne2 Be7 21.Ra7 Nf6? (21...Rc2 22.Rha1 Rd2 23.Bb5 Kf8 24.Ra8 Bd8 25.R1a7+–) 22.Rc1 Bd8 23.Bb5 Kf8 24.Ba4 g6? 25.Rc8+– Kg7 26.Raa8 Nd5 27.Rd8 Rd8 28.Rd8 (28...h5 29.Rc8+–) 1–0. Sundin,Tommy – Johansson,Mattias, Uppsala Sweden, 1988.

5.Nc3 e5!?+=.

5.f4 e6 6.Nf3 a5 7.ab5 cb5 8.Bd3 Bb4?? (better 8...Nc6 9.ba5 Na5+–) 9.Bg7+– Ke7 (9...Bc5 10.Bh8 b4 11.c3+–) 10.Bh8 Nh6 11.Bg7 Nf5 12.Bf5 ef5 13.Nc3 Bc6 (13...Bc3 14.dc3 Be6 15.0–0+–) 14.Nd4 Qg8 15.Nf5 Kd7 (15...Kd8 16.0–0+–) 16.0–0 Ke6 (16...Na6 17.Qg4 Qe8 18.Ne2 Bd2 19.Be5+–) 17.Qg4 (17.Qg4 Kd7 18.Nd4 f5 19.Qf5 Ke8 20.Bf6+–) 1–0. Gu00 – Gu34, internet, 2018.

4.a4 e6

5.ab5 Bb4?? 6.Bg7+– a5 7.Bh8 (7.Nf3 Bd7 8.bc6 Nc6 9.Bh8 Nf6 10.Bb5 Ne5 11.Ne5 Bb5+–; 7.bc6 Nc6 8.c3 Bd6 9.Bh8 Nge7 10.Qa4 Bd7 11.Qh4 Qb6+–; 7.c3 Bd6 8.Bh8 Nf6 9.bc6 Nc6 10.Qa4 Kd7 11.Bg7 Ne8+–) 7...cb5 8.Bb5 Bd7 9.Bd3 Nf6 10.c3 Bd6 11.Qf3 Ne4 +–.

5.ab5 Bb4?? 6.Bg7+– cb5 7.Bh8 (7.Bb5 Bd7 8.Bd7 Nd7 9.Bh8 Ngf6 10.Nf3 Qc7 11.0–0 a5+–) 7...Nf6 8.Bb5 Bd7 9.Bd3 Nc6 10.Ra4 a5 11.Ra2 e5 +–.

5.ab5 Bb4?? 6.Bg7+– f6 7.Qh5 (7.Bh8 Qe7 8.Qg4 Qf8 9.bc6 Nc6 10.Bb5 Nge7 11.Qh5 Qf7+–) 7...Kd7 8.Bh8 c5 (8...Nh6 9.Qh4 (9.Ra4 Bd6 10.Qh6 Qh8 11.Rh4 cb5+–) 9...Be7 A) 10.Qh6 Qh8 11.Nf3+– (11.d4 cb5+–) 11...Kd8+–; B) 10.Bg7 Nf5 11.Qh7 Ng7+–; 8...h6 9.Qf7 Be7 10.Ra4 Qe8 11.Qh7 f5+–) 9.Qh7 Kd6 (9...Ne7 10.Bf6 c4 11.Nf3 Qf8+–) 10.Bg7 (10.Nf3!? c4 (10...Nd7 11.c3 Ba5 12.Ra5 Qa5 13.Qg8 Bb7 14.Qg3 Ke7 15.Bf6 Nf6 16.Qg7 Kd6 17.Qb7 Re8 18.Qc6 Ke7 19.Qc5 Kf7 20.Ne5 Kg8+–) 11.Bc4 a5+–; 10.c3 Ba5 11.Ra5 Qa5+–) 10...c4 11.Bh6 (better is 11.Nf3 Nd7+–; 11.Bc4 a5+–) 11...Ne7 (11...Nh6 12.Qh6 Nd7 13.Ne2+–) 12.Qg7 (12.Nf3 Qg8 13.Qg8 Ng8 14.Bf8 Ne7+–) 12...Nf5 13.Qf8 Kd7 (13...Qf8 14.Bf8 Ne7 15.h4+–) 14.Qd8 (better is 14.Qb4 Nh6 15.Nc3 Qe7+–) 14...Kd8 15.Bf4 e5 16.Bg3 Nd7 17.Nf3 Nb6 18.h4 Nh6 (18...Bd7 19.h5 Ng3 20.fg3+–) 19.Nc3 Bf5 20.Kd1 e4 (20...Bd7 21.h5 Ke7 22.Nh4+–) 21.Nd4 Bg4 22.Be2 Bd7 23.Nc6 Ke8 (23...Bc6 24.bc6 Nf5+–) 24.Nb4 Be6 25.Bf4 (25.Na6 Rc8 26.Nc7 Rc7 27.Bc7 Nc8+–) 25...Nf5 26.h5 d4 27.ed4 Nd4 28.h6 Ke7 29.h7 Ne2 30.Ke2 f5 31.h8Q Rh8 32.Ra7 Kf6 33.Rh8 Nd7 34.Rh6 Ke7 35.Nc6 Kf7 36.Rh7 Kg8 37.Re7 Nf8 38.Ra8 Bf7 39.Ne5 Bh5 40.Ke1 Bf7 41.Nd7 1–0. pzn2pawn (1860) – Jim Kasparov, redhotpawn.com, 2016.

5.ab5 Bb4?? 6.Bg7+– Nf6 7.Bh8 A) 7...cb5 8.Bb5 (8.Nf3+– Bd7 9.Nd4 Nc6 10.Nb5 Be7 11.Ra6 Ne4+–) 8...Bd7 9.Bd3 Nc6 10.Nf3 a5 11.c3 Bd6+–; B) 7...a5 8.Nf3 cb5 9.Bb5 Bd7 10.Be2 Nc6 11.0–0 Kf8+–.

5.ab5 cb5 6.Bb5 Bd7 7.Bd3 Qb6 8.Qg4 Nf6 9.Bf6 gf6 10.c3 Nc6 11.Nf3 Bd6 (better is 11...a5!?+/–) 12.Qg7+– Ke7 13.Bh7 Rab8 14.Na3 Rhc8 15.Nc2 Rc7 16.Nh4 Ne5? (16...Ke8+–) 17.f4 (17…Nc4 18.Ng6 Kd8 19.Qf7+–) 1–0. Reuter,Alfred – Andraschko,Felix, DESC, 1999.

4.Nf3 Bb7

5.Be2 Nd7 6.0–0 Ngf6 7.a3 e6 8.d4 Bd6 9.Nbd2 Qe7 10.Nb3 e5 (10...0–0 11.Nc5 Bc5 12.bc5=) 11.Nc5 (11.de5 Ne5 12.Be5 Be5 13.Ne5 Qe5+–) 11...Bc5= 12.dc5 (12.bc5 e4 13.Nd2=) 12...e4 (better 12...a5!?=) 13.Nd4+– 0–0 14.h3 (14.Nf5 Qd8+–) 14...g6 (14...Rfb8 15.Nf5 Qe6 16.Bg4 Ng4 17.Ng7+– (17.hg4?! f6=)) 15.Nb3 Rab8 (15...Ne5 16.Qd4 Rfe8 17.a4+–) 16.Na5 (16.a4 a6+–) 16...Ba8 17.Qd4 Rfe8 18.Rae1 (18.a4 a6+–) 18...Qe5+= 19.f4 (19.Nb3 Qg5+–) 19...ef3= 20.Rf3 (20.Bf3 Re6=) 20...Qd4 21.Bd4 Ne4 22.Bd3 f5 23.Be4 (23.Rd1 Rbd8=) 23...Re4 24.Rf4 Rbe8 25.Re4 Re4 26.Rf1 Kf7 (26...h6 27.Nb3=) 27.Rf4 (27.g4 Ke6 28.Nb3 fg4+=) 27...Ke6 28.Re4 (28.Nb3 Nf6=) 28...de4 29.c4 bc4 (29...a6 30.cb5 ab5 31.Kf2=) 30.Nc4+= Bb7 31.Na5 Ba8 32.Kf2 Kd5 33.Kg3 (33.Bg7 h5+=) 33...Nf8= 34.Kh4 (34.Bb2 Ne6=) 34...Ne6 (34...f4!?–/+) 35.Bf6 f4 36.ef4 e3 (36...Nf4 37.g3 Ne2 38.g4=+) 37.Kg3= Ke4 38.Bc3 (better 38.Be5=) 38...Nf4–/+ 39.Be1 (39.Bh8!?–/+) 39...Nd3–+ 40.Bc3 e2 41.a4 (41.Kg4 h6 42.Nc4 e1Q 43.Nd6 Kd5 44.Be1 Ne1–+) 41...e1Q 42.Be1 Ne1 43.b5 Kd5 44.b6 Kc5 (better 44...Nd3!? 45.b7 Bb7 46.Nb7 Nc5 47.Na5–+) 45.b7 Bb7! 46.Nb7 Kb4 47.Nd8 c5 48.Nc6 Ka4 49.Na7? (49.Kf2 Nc2 50.Na7–+) 49...c4 50.Kf2 (50.Nc6 c3 51.Nd4 h6–+) 50...Nd3 (better 50...Ng2!? 51.Nc6 c3 52.Nd4–+) 51.Ke3 Ne5?? (better 51...Kb3–+) 52.Kd4–/+ Kb3?? (better 52...h5–/+) 53.Nb5?? (53.Ke5 c3 54.Nb5+–) 53...Nd3 (53...Kb4 54.Nc7 Nc6 55.Ke3–+) 54.Ke3? (better 54.Nd6!? Nb2 55.Ne4–+) 54...Nb4 55.Kd2 Nd5 Black prepares the advance c3 56.Nd4 Kb4 (better 56...Kb2!? 57.Nc2–+) 57.Nc6 Kc5 58.Ne5 c3 59.Kd3 Kd6 (59...Kb4 60.Nc6 Kb3 61.Na5 Ka4 62.Nb7–+) 60.Nc4 (60.Nf3 Nf4 61.Kc3 Ng2–/+) 60...Ke6 (60...Kc6 61.Ne5 Kb5 62.Kc2–+) 61.Na3 Nf6 (61...Kf5!? 62.g3 Nf4 63.gf4 Kf4–+) 62.Nc2 (62.Nb5 c2 63.Kc2 Ke5–/+) 62...Kf5 63.Kc3 Ne4 64.Kd3 Ng5 (better 64...Kf4!?–/+) 65.Ke3= h5 66.Kf2 (66.Nd4 Ke5=) 66...h4 67.Ne3 (67.Ke3 Ne6=) 67...Kf4 (67...Ke5 68.Ng4 Kf4 69.Nf6=) 68.Ng4 (68.Nd5 Ke5 69.Ne7 Kf6=) 68...Ne4=+ 69.Kg1 Ng5 70.Nh2 (70.Kf2 Ne6=) 70...Ne4 71.Nf1 (71.Ng4 Nc5=+) 71...Ng3 72.Nh2 g5 73.Nf3 g4 74.Nh4 gh3 75.gh3 Kg5 76.Ng2 Kh5 77.Kh2 Nf5 78.Nf4 Kh4 79.Ng2 Kg5 80.h4 Kh5 81.Nf4 (81.Nf4 Kh4 82.Ne6=). BeepBeepImAJeep (2715) – erindreki (2440), lichess.org, 2015.

5.Be2 f6 6.a4 a6 7.ab5 cb5 8.0–0 (8.Nd4 Qb6 9.c3 e5+=) 8...e6 (8...e5 9.c3=) 9.Nd4 Qc8 (9...Qb6 10.c3+=) 10.Bh5 g6 11.Bg4 f5 (11...Bb4 12.Be6 Qc7 13.Qg4+–) 12.Be2 (12.Nf5 ef5 13.Bf3 Nf6 14.Bf6 Rg8+–) 12...Bb4? (better 12...Nf6!? 13.Nb5 Kf7+=) 13.Ne6! Qe6 14.Bh8 Ne7 15.c3 (15.Bf3 Nbc6+–) 15...Bd6 16.f4 (16.Na3 Nbc6+–) 16...Nd7 (16...Kf7 17.Be5!+–) 17.Qe1 Kf7 18.Bd4 Nc6 19.Qh4 Kg8 20.g4 Nd4 21.cd4 Be7 22.Qg3 (22.gf5 gf5 23.Qh3 Nf6+–) 22...fg4 (22...Nf6 23.g5 Ne4 24.Qf3+–) 23.Bg4 Qd6 24.Nc3 (24.Qh3 Bc6+–) 24...Nf6 25.Bh3 b4 26.Na4 Ne4 27.Qg2 a5 28.f5 (28.d3 Nc3 29.Nc5 Qc6 30.Nb7 Qb7 31.Be6 Kg7+–) 28...Kh8 (better 28...Ba6!? 29.Rfc1 Ng5+–) 29.fg6+– hg6 30.Nc5! Nc5 31.dc5 Qa6 (better 31...Qe5 32.Rac1 Bc6+–) 32.Be6?? (better 32.Qg3 Bf6 33.Rac1+–) 32...Qe6–+ 33.Rf3 (33.Rfc1–+) 33...d4 (better 33...Bc5 34.Qg5 Kg7–+) 34.Rh3+= Kg7 35.Qb7 (35.Qb7 Qh3 36.Qe7 Kg8 37.Qe4+= (worse 37.ed4 Qg4 38.Kh1 Qd4 39.Qe6 Kg7=+)) 1–0. GuestPRZH – GuestYFJB, freechess.org, 2017.

3.e3 Qb6

4.a3 c5 5.c3 (5.Nc3 Nf6+=) 5...d4 (5...Nf6!?=+) 6.ed4 (6.cd4 cb4 7.Qa4 Bd7 8.Qb4 Qb4 9.ab4 e6+=) 6...cd4 7.cd4 (7.Nf3 Nc6+=) 7...Nc6 (7...Nf6 8.Nc3+=) 8.Nf3 (8.d5 Nd4+=) 8...a5 (8...Nf6 9.b5+=) 9.b5 (9.d5 Nd8+/–) 9...Na7 (9...e6 10.Nc3 Nd4 11.Ne4 Nf3 12.Qf3+=) 10.a4 (10.d5 Bg4 11.h3 Bh5+/–) 10...Bd7 (10...Nf6 11.Bc4+=) 11.Be2 (11.d5 Rc8+/–) 11...Nf6 12.0–0 (12.Ba3 Ne4+=) 12...e6 (12...Bf5 13.Nc3+=) 13.Nc3 (13.Na3 Rc8+=) 13...Be7 (13...Bd6 14.Ne5+=) 14.Qb3 (14.Ba3 Ba3 15.Ra3 0–0+=) 14...0–0 15.d5 ed5 (15...Rad8!?+=) 16.Nd5+– Nd5 17.Qd5 Be6 18.Qh5 (18.Qd4 Qd4 19.Bd4 Rfc8+–) 18...Nc8 (18...Rad8 19.Rad1+/–) 19.Ng5 (19.Rae1 Re8+–) 19...Bg5 (19...Bf5 20.Rae1+/–) 20.Qg5 f6 21.Qg3 (21.Qh5 Qd8+/–) 21...Nd6 22.Bd3 (22.Rac1 Rad8+/–) 22...Nf5 (22...Rac8 23.Rae1 Nc4 24.Bc3+/–) 23.Qf4 Ne7 24.Rfe1 Kh8? 25.Qe4 Bf5 26.Qe7 Bd3 27.Rac1 Rac8?? 28.Rc8 Rc8 29.Qe8!! Re8 30.Re8# 1–0. toll (1660) – eldoran (1725), ICC, 2003.

4.a3 Bd7 5.c4 dc4 6.Bc4 Be6? (better is 6...e6!?+=) 7.Be6+– fe6 8.Qg4 Nf6 9.Qe6 Na6 10.Bf6 gf6 11.Nc3 Nc7 12.Qf5 Rd8 13.Qh5 Kd7 14.Nf3 Qa6 (14...Kc8!?+/–) 15.Qf5+– Ke8 16.Ne4 Bg7 17.Nc5 Qb5 (17...Qb6 18.d4+–) 18.Nd4 Qc4 19.Nce6 Ne6 20.Ne6 (20.Qe6 Rd4 21.Qc8 Kf7 22.Qb7 Rd2 23.Kd2 Rd8 24.Ke1 f5 25.f3 Bc3 26.Kf2 Rd2 27.Kg3 Be5 28.Kh3 Qe6 29.Qe7 Ke7 30.f4 Qg6 31.fe5 Qg4) 20...Kf7 21.Nd8 Rd8 22.Qh7 Kf8 (22...Qg4 23.d4+–) 23.Qf5 e5 24.f3 Qb3 25.Qb1 Qd5 26.Qc2 Ke8 27.Rc1 Rd7 28.Ke2 f5 29.g3 (29.h4 e4+–) 29...Bh6 (29...e4 30.fe4 fe4 31.Ke1+–) 30.d3 f4 31.Qc4 fe3 32.Qd5 cd5 33.Rc5 Ke7 34.h4 Ke6 35.g4 Rh7 36.Rg1 Bf8 37.Rc8 Rh4 38.Ke3 (38.Rf8!? Rh2 39.Kd1 Rd2 40.Kc1 Ra2 41.Re8 Kd6+–) 38...Bd6 39.Rg2 (39.d4 e4+–) 39...d4 (39...Rh1 40.Re8 Kf7 41.Ra8+–) 40.Ke4 Rh1 41.Re2 a6 42.Re8 Kf7 43.Ra8 Rc1 (43...Ke6 44.Ra7 Rh7 45.f4 ef4 46.Kd4 Kf6 47.Re8+–) 44.Kd5 Bc7 (44...Rc6 45.Rh2 Bf8 46.Rd8+–) 45.Ra7 (45...Kg6 46.Rb7+–) 1–0. Sternik,Ryszard – Robson,Alan, corr SOK–97–123, 1999.

4.a3 e5?? 5.Be5 Nd7 6.Bd4 c5 7.bc5 Bc5?? 8.Bg7 d4 9.Bc4 Ndf6 10.Bh8 Qb2 11.Ra2 Qb6 12.a4 Be6 13.Bb5 Ke7 14.Rb2 Ba3 15.Na3 Qa5 16.ed4 a6 17.Bc4 Qa4 18.Rb7 Kd6 19.Qf3 Bc4 20.Qf4 Kc6 21.Qc7 Kd5 22.Qe5 Kc6 23.Rc7 Kb6 24.Qc5# 1–0. vik – lukos, Internet, 2001.

4.b5!?

4.c3 a5 5.a3 Nf6 (--> 1.b4 c6 2.Bb2 a5 3.c3 Qb6 4.a3 Nf6 5.e3 d5).

4.Nf3 Qb4=+ 5.Ba3 (5.Bc3 Qa4=+) 5...Qa5 6.Be2 Nd7 7.0–0 e6 (7...Ngf6 8.d4=+) 8.Bf8 Nf8 9.d4 Nf6 10.c4 Ng6 11.Nbd2 Qc7 12.Rc1 Qd6 (12...0–0 13.Bd3=) 13.c5 Qe7 14.Qb3 (14.Bd3!?=) 14...e5=+ 15.de5 Ne5 16.Ne5 Qe5 17.Nf3 Qc7 18.Bd3 Ng4 (18...0–0 19.Rb1–/+) 19.Qc2 h6 20.e4 Nf6 (20...0–0 21.ed5 cd5 22.Rfe1=+) 21.e5 (21.ed5 Nd5 22.Rce1 Be6=) 21...Nh5 (21...Nd7 22.Rfe1 0–0 23.Re2=+) 22.g3 (22.Qa4 g5=) 22...Bh3 (22...0–0 23.Qa4=+) 23.Rfe1= 0–0 24.Rb1 Rab8 (24...Rfe8 25.Rb4 Qc8 26.a3=+) 25.Rb4 Qd7 26.Rh4 Bg4? (better 26...g6!?+=) 27.e6!+– fe6 (27...fe6 28.Bh7 Double attack (28.Rg4 Decoy; 28.Rg4 Interception); 27...Be6 28.Bh7 Double attack (28.Rh5 Deflection)) 28.Ne5 Qe7?? (28...Qc7 29.Bh7 Kh8 30.Rg4 Rfc8+–) 29.Bh7 Kh8 30.Ng6 (30.Ng6 Kh7 31.Ne7 Bf5 32.Nf5 ef5 33.Rh5+–) 1–0. GuestRQZV – GuestZKXT, freechess.org, 2019.

4.a3 a5

5.b5 cb5 6.Nc3 e6 7.Bb5 Bd7 8.Bd7 Nd7 9.Rb1 Ngf6 10.Nf3 Bd6 11.Nd5! ed5 (11...Nd5 12.Bg7) 12.Bf6 Qc7 13.Bg7 Rg8 14.Bb2 Rg2 15.h3 Rc8 (15...Bg3 16.Rf1= (16.fg3?? Qg3 17.Kf1 Qf2)) 16.c3 (16.Nd4 Bg3 17.Nb5 Qb8+/–) 16...Nc5 (better is 16...Bg3 17.Rf1 Nc5=) 17.d3?? (17.Kf1 Rg6+/–) 17...Qc6?? (better is 17...Bg3 18.Nd4 A) 18...Bf2 19.Kf1 Bh4 20.Ne2 (20.Kg2?? Qg3 21.Kf1 Qf2) 20...Rf2 21.Ke1–+; B) 18...Qe5–+) 18.Rg1 Rg1 19.Ng1 Na4 20.Ne2 Nb2 21.Rb2 Ba3 22.Ra2 Bd6 23.Ra5 d4 24.Qa4 (24.Nd4?? Qc3 25.Qd2 Qd2 26.Kd2 Bb4 27.Ke2 Ba5–+) 24...Qa4 25.Ra4 dc3 26.Rc4 Rc4 27.dc4 Bb4 28.Kd1 Ke7 29.Kc2 Kf6 30.Nc3 Bc3 31.Kc3 Kg5 32.Kd4 Kh4 33.Ke4?? (better is 33.Kc5 Kh3 34.Kb6+/–) 33...Kh3–+ 34.Kf5 h5 35.Kg5 h4 36.e4 f6 (better is 36...Kg2 37.Kh4 Kf2–+) 37.Kf6= Kg4 38.e5 h3 39.e6 h2 40.e7 h1Q 41.e8Q Qf3 42.Ke7 Qe4 43.Kd8 Qc4 44.Qd7 Kf3 45.Qb7 Kf2 ½–½. Swiatek,Agata – Wilczynska,Malgorzata, Poland–ch U12 Girls, 1998.

5.b5 cb5 6.Nc3 Nf6 7.Bb5 Bd7 8.Rb1 +=.

5.b5 Bd7 6.Nf3 f6 (6...Nf6 7.Be2=) 7.Nc3 e5 8.d4 e4 9.Nd2 Ne7 (9...Qc7!?=) 10.Nce4!+/– de4 (better is 10...cb5 11.Nc5 Bf5+/–) 11.Nc4+– Qc7 (11...Bg4 12.Qg4 (12.Nb6?! Bd1 13.Na8 Bc2+–) 12...Qc7 13.b6+–) 12.b6 Qc8 13.Nd6 Kd8 14.Nf7 (better is 14.Nc8 Nc8 15.c4+–) 14...Ke8 15.Nd6?? (15.Nh8 g6 16.d5+/–) 15...Kd8 16.Nc8 Nc8 17.c4 Nb6 18.Qb3 Kc7 Black prepares a4 19.Be2 a4 20.Qc2 White intends c5 20...f5 21.0–0 Be7 22.d5 Rg8 23.d6! Bd6 24.c5 Nd5 25.cd6 Kd6 26.Rac1 Na6 27.Rfd1 Nac7 28.Qc5 Ke6 29.Bc4 Rge8 30.Qd4 Ke7 31.Bd5 Nd5 32.Qg7 Kd8 33.Rd5! cd5 34.Bf6 (34...Re7 35.Qe7#) 1–0. smoothmovermovesagain – jammboy, ChessWorld.net, 2006.

5.b5 Nd7 6.Nf3 Ngf6 7.a4 e6 8.Be2 Bd6 9.d4 0–0 10.0–0 Qc7 11.c4 dc4 12.Na3 Nb6 13.Rc1 (13.Nc4 Nc4 14.Bc4 Bd7=) 13...Qe7 (13...Ng4 14.h3 c3 15.Rc3 Nd5=) 14.Nc4+= Nc4 15.Bc4 cb5 16.ab5 (16.Bb5 Rd8+=) 16...b6 (16...a4 17.Ne5=+) 17.Ne5 Bb7 18.f4 (18.Qa4 Rfc8=) 18...Be5 (18...a4!?=+) 19.fe5+= Nd5 20.Qe2 Rac8 (20...Qg5!? 21.e4 Ne3=) 21.e4+/– Nb4 22.Rc3 (22.Ba3!?+/–) 22...Qh4+= 23.Re3 Rc7 24.Bb3 Rfc8 25.Qf3 Rd7 26.g3 Qg5 27.Rc3 Rcd8 (27...Rdc7 28.Be6 Qe7 29.Bc8 Bc8 30.Rc7 Qc7 31.Ba3+–) 28.Rc4 Qd2 29.Bc1?? Qd3–/+ 30.Bg5 Qf3 31.Rf3=+ Re8 32.Rfc3 h6=+ 33.Be3 Be4 34.Rc8 Red8 35.d5 Nd5 36.Bd5 Rd5 37.Bb6 Rc8–/+ 38.Rc8 Kh7 39.Ba5 Rb5 40.Bc3 Rb1 41.Kf2 Rc1 42.Ke3 Bd5 43.Rc7 Kg6 44.Ba5 Ra1 45.Bb4 Rb1 46.Ba5 Rf1 47.Bb4 Rf3 48.Ke2 Rf5 49.Bd6 Rh5 50.h4 Rf5 51.Rc3 Kh5 52.Re3 Bc6 53.Bf8 g5 54.hg5 hg5 55.Bg7 Kg4 56.Bf6 Kh3 57.Ke1 Bd5 58.Ke2 Kg2–/+ 59.Ke1 Bf3 60.Rc3 Kg3 61.Kd2 g4 62.Rc7 Kf2 63.Rf7 g3 64.Rc7 Rh5 65.Rc1?? g2 66.Bd8 Rh1 67.Bb6 Kg3 (68.Rg1 Kh2–+) 0–1. Barash,Danny – Shabtai,Ran (2320), Ramat Hasharon, 1992.

5.b5 e6 6.a4 Nd7 7.f4 Ngf6 8.Nf3 Be7 9.c4 (9.Be2 0–0=) 9...cb5 10.ab5 dc4 11.Bc4 Qc7 12.Qe2 b6 (12...Nb6 13.Bd3=) 13.Na3 Bb7 14.Rc1 Rc8 15.0–0 Qd8 16.f5 ef5 17.Ng5 (17.Nd4 g6+=) 17...0–0= 18.Rf5 h6 19.Nh3 Be4 (19...Re8 20.Nf2=) 20.Rff1= Nc5 21.Nf2 ½–½. De Cat,Ben (2075) – Balow,Guido (1995), NATO–chT, 1999.

5.b5 e6 6.c4 dc4 7.Bc4 cb5 8.Qb3 Bd7 9.Nc3 b5 draws heavy fire 9...a4 10.Na4 Ra4 11.Rc1 Ra5 (better is 11...Qa5 12.Be2 Ba3 13.Nf3 Bb2 14.Qb2–+) 12.Nf3 Qa6 13.Bd3 Nc6 (13...Bc6 14.e4–+) 14.Ng5 (14.Be4 f5 (14...Ba3?! 15.Bg7 Bc1 16.Bh8–+) 15.Bc2 Nf6–+) 14...h6 15.Ne4 Ba3 16.Rc6? (16.Bg7 Bc1 17.Bh8–+) 16...Bc6 (16...bc6 17.Bg7 Rh7 18.Nd6 Bd6 19.Bh7–+) 17.Bg7 Rh7 (17...Bd5 18.Qc2 Be4 19.Be4–+) 18.Nd6 Bd6 19.Bh7 Ne7 (better is 19...Ra3!? 20.Qc2 Ra2 21.Bb2–+) 20.0–0 (20.e4 Ra3 21.Qb2 f5–+) 20...Nf5 (better is 20...Bd5!? 21.Qc3–+) 21.Bf5 ef5 22.Bh6 b4 23.Qb2?? (23.d3 Bd5 24.Qc2 Bh2 25.Kh2 Qh6 26.Kg1 Qc6 27.Qc6 bc6–+) 23...Qc4 24.Qh8 Kd7 25.Bg5 Qg4 26.Qd8= Ke6 27.f3 Qh5 28.h4?? Rd5 29.e4?? Bh2! 30.Kh2 Rd8 31.ef5 Kf5 32.g4+= Ke6 33.gh5 Rd3 34.Re1 Kf5 35.Re7 b3 36.Rf7+/– Ke6 37.h6?? b2 38.Re7 Kf5? 39.Re1?? Kg6 40.Rb1+/– Rb3 41.h5?? Kf7?? 42.Be3 Rb4? 43.Kg3+– Bd5 44.Rb2 Rb2 Deflection from d4 45.Bd4?? Rc2?? 46.h7+– Rc8 47.h8Q Rh8 48.Bh8 b5 49.Bc3 Bc4 50.f4 Bd3 51.Kg4 Ke6 52.Kg5 Bc2 53.Kh6 Kf7 54.d4 Be4 55.Ba5 Kf6 56.Bb4 Kf7 57.Bc3 Kg8 58.Kg5 Kf7 59.f5 Bd5 60.h6 Be4 61.d5! White intends f6 61...Kg8 62.d6 Bc6 63.Kf6 Bd7 64.Kg5 Kh7?? 65.f6+– Kg8 66.h7! Kh7 A deflection 67.f7 b4 68.f8Q bc3 69.Qh6 Kg8 70.Kf6 (70...c2 71.Qg7#) 1–0. Tome,Daniel – Quintino,Ricardo, POR–ch U18 Olival Basto, 2000.

5.b5 e6 6.Bd4 c5 7.Be5 Nd7 =.

5.c3 (--> 1.b4 c6 2.Bb2 a5 3.c3 Qb6 4.a3 d5 5.e3).

5.c3 Nf6 (--> 1.b4 c6 2.Bb2 a5 3.c3 Qb6 4.a3 Nf6 5.e3 d5).

5.Nc3 Nf6 6.b5 (6.Na4 Qc7=) 6...Nbd7 7.Na4 (7.Rb1 e5=) 7...Qc7 8.c4 e5 9.cd5 Nd5 10.Rc1 (10.Nf3 Bd6=) 10...Bd6 11.Qc2 (11.Nf3 0–0=) 11...N7f6 12.bc6 0–0 13.Nf3 bc6 14.Qc6 Qb8 15.Ne5 Ra7 (15...Be5 16.Be5) 16.Nc4 Ra6 17.Nab6 (17.Nd6?? Rc6 18.Rc6 Bd7–+) 17...Rb6 18.Nb6 Nb6 19.Bf6 Bd7 (worse is 19...gf6 20.Rb1 Bc7 21.Qf6+/–) 20.Qf3 gf6 21.Bd3 (21.Qf6 Ba3 22.Rb1 Bb4 23.Qg5 Kh8 24.Qf6 Kg8 25.Qg5 Kh8 26.Qf6 Kg8=) 21...Ba3 (21...Kg7 22.Rb1 Qc7 23.Qh5=) 22.Rc6 (22.Qh5 Rd8 23.Qh7 Kf8=) 22...Rd8 (22...Rc8 23.Rc8 Qc8 24.0–0=) 23.Rf6 Be6 24.Bf5 Nd7 25.Rh6 Ne5 26.Bh7 Kf8 27.Qh5 Qc7 28.0–0 Ng4 29.Re6 fe6 30.Rb1 Nf6+= 31.Qf3 Qf7 32.Bc2 Rd2 33.Rb8 Ke7 34.Rb7 Nd7 35.Qf7 Kf7 36.Ba4 Ke7 37.h4 Kd8 38.Ra7 Bb4 39.h5 Nb6 40.Bc6 Rc2 41.Be4 Rc7 42.Ra6 Nd7 43.h6 Nc5 44.Ra8 Rc8 45.Rc8 Kc8 46.Bb1 Kd8 47.g4 Ke7 48.g5 a4 49.f4 Bc3 50.Kg2 Bh8 51.Kf3= Na6 ½–½. Brueske,Thomas (2360) – Trokenheim,Marek (2175), RSX5D – A00 – Sokolsky–1, 2010.

5.c4 ab4 6.c5 Qc5 7.ab4.

5.c4 Bf5 6.Bd4 Qc7 7.cd5 cd5 8.Nc3 Nf6 (8...Nc6 9.Bb5 e6 10.Nf3+=) 9.Bf6+= ef6 10.Nd5 Qd6 11.Bb5 Nc6 (11...Kd8 12.Bc4 Be6 13.e4=) 12.Nb6 Rb8 (12...Ra7 13.Qa4 Kd8 14.Bc6 Qc6 15.Qc6 bc6 16.ba5 Ra5 17.Nc4=) 13.ba5 Be7 14.Qf3 Qe5 (14...Qe6!?+/–) 15.Bc6+– bc6 (15...Kf8 16.Rc1 bc6 17.Qc6 Qa5 18.Nd7 Bd7 19.Qd7+–) 16.Qc6 Kf8 17.d4?? (better is 17.Qc3+–) 17...Qa5–+ 18.Ke2 (18.Kf1 Rb6 19.Qc4 Rb4–+) 18...Rb6 (18...Qb6?! 19.Qb6 Rb6 20.Nf3–/+) 19.Qc1 Qb5 20.Kf3 (20.Ke1 Rc6 21.Qd1 Ba3 22.Ra3 Qb4 23.Ke2 Qa3–+) 20...Qd5 (20...Bd7!? 21.h4 Bd6 22.g3 Qd5 23.e4 Rb3 24.Kg2 Qe4 25.f3 Qd4 26.Ra2–+) 21.Kg3 Bd6 22.f4 g5 (better is 22...Rc6 23.Qe1 Rc2–+) 23.Nf3 (23.Ne2–+) 23...gf4 24.ef4 Rg8 25.Kf2 Rc6 26.Qf1 (26.Qd2 Rc2 27.Qc2 Bc2 28.Rhc1–+) 0–1. De Visser,Arno – Ruiter, 1985.

5.b5 Bf5

6.Nc3 a4 7.Nf3+= e6 8.Be2 Bd6 9.Nd5 cd5 (9...ed5 10.Bg7) 10.Bg7 f6 (10...Qc5 11.Bh8 Bc2 12.Qc1+–) 11.Nd4 (11.Bh8 Be4+–) 11...Bg6 (11...Be5 12.Bh8 Bd4 13.ed4 Qd4 14.c3+–) 12.Bh8 Kf7 (12...e5 13.Nf3+–) 13.h4 (13.Bg4 f5 14.Be2 Nd7+–) 13...e5 14.h5 Be4 15.d3 Bg2 16.Rg1 Qa5 17.Qd2 Bh3 18.Rg7 Kf8 19.Qa5 (19.Nf3 e4 20.Nd4 Qb6+–) 19...Ra5 20.Nf3 Rb5 21.Nh4 (21.d4 Rb2 22.de5 Be5 23.Ne5 fe5+–) 21...Ne7 22.Rh7 Nd7 (22...Kg8 23.Rh6 Rc5 24.Kd2+–) 23.Ng6 Ke8 24.Bg7 (24.Ne7 Be7 25.c4 dc4 26.dc4 Rb2+–) 24...Kd8 (24...Bf5 25.c4 dc4 26.dc4 Rb1 27.Rb1 Bb1 28.Rh8 Kf7 29.Rd8+–) 25.Rh8 Kc7 26.Ne7 Be7 27.h6 Bf5 (27...Rb2 28.Kd2 Bg2 29.Rg1 Ba3 30.Rg2+–) 28.h7 (better is 28.Kd2 Kd6+–) 28...Kd6 29.Bg4! Bh7 (29...Bg4 30.Rg8) 30.Rh7 (30...d4 31.Bd7 Kd7 32.Bf6+–) 1–0. Schuehler,Ernst – Mueller,M, corr DDR, 1990.

6.Nc3 e5 7.Nf3 Bd6 8.Rb1 =.

6.c4 e6 7.Nf3 Nf6 (7...dc4 8.Bc4 cb5 9.Qb3=) 8.Nc3 (8.Nh4 Bg4 9.f3 Bh5+=) 8...Be7 9.cd5 cd5 (9...ed5 10.Be2=) 10.Ne5 (10.Be2 Bg4=) 10...0–0 11.g4 Be4 12.Ne4 (12.f3!? Bg6 13.h4=) 12...Ne4=+ 13.h4 (13.Bd4 Bc5 14.Bc5 Qc5=+) 13...f6 14.Nf3 Nd7 15.d3 Nd6 (< 15...Qb5 16.Rb1 (16.de4 Qb2 17.Nd2 de4–+) 16...Nd6 17.Nd4+/–) 16.a4 Nf7 (16...Rac8 17.Rc1=+) 17.Be2 (17.Bc3 Rac8 18.Rc1 Rc3 19.Rc3 Bb4–+) 17...Bb4 18.Kf1 (18.Nd2 Rac8=+) 18...e5–/+ 19.Qb3 Qd6 20.Kg2 Rac8 21.Rhc1 Nc5 22.Qd1 Qd7 23.Nh2 Kh8 Black prepares d4 24.Nf1 d4 25.Ng3 de3 26.fe3 Qd5 27.Kh2 Rcd8 Now all is on d3 28.d4= Qb3 29.Rc2 Qe3–+ 30.d5 Qf2 31.Kh3–/+ Ne6 32.de6= Rd1 33.Bd1 Qf4 34.ef7 h5 35.gh5 e4 36.Bg4+/– Bd6 37.Rg2 Rf7 38.Rf1 Qe3 39.Bf5 Qb3+/– 40.h6 gh6 41.Bg6 Qe6 42.Rf5 Rf8 43.Ne4!+/– Be5 44.Be5 fe5 45.Rgf2 Rf5= 46.Bf5 Qb3 47.Kg4 Qa4 48.Rd2 Qb5 49.Rd8 Kg7 50.Rd7 Kf8 51.Rf7!?+= Kg8 52.Kh5 Qc6 53.Rf6 Qc1?? 54.Be6 Kh8 55.Rf8 Kh7 56.Nf6 Kg7 57.Rf7 (57...Kh8 58.Rh7#) 1–0. Maeurer,Christoph (2310) – Oberst,Thomas (2270), BL2–Sued, 2001.

6.Bd4 c5 7.Bb2 Nf6 =.

6.Nf3 Nf6 =.

5.b5 Nf6

6.a4 c5 7.Nf3 (7.c4 Nbd7+=) 7...Nbd7 8.c4 (8.g3 Qd6=) 8...e6 9.Bd3 (9.Be2 Bd6=) 9...Qc7= 10.Nc3 b6 11.cd5 ed5 12.0–0 (12.e4 d4 13.Nd5 Nd5 14.ed5 Bd6=+) 12...Bd6= 13.e4 de4 (13...d4!? 14.Nd5 Nd5 15.ed5 0–0=+) 14.Ne4+= 0–0 15.Qc2 Nd5? (better 15...h6+=) 16.Nd6+– Qd6 17.Bh7 Kh8 18.Be4 Bb7? (18...N7f6+–) 19.Ng5 Qf4 (19...Qh6 20.Ra3 Nb4+– (20...Qg5?? 21.Rh3 Qh6 22.Rh6 Kg8 23.Bh7 Kh8 24.Bg8 Kg8 25.Qh7)) 20.Bd5 Qg5 21.Ra3 Bd5 (21...Qd5?? 22.Rh3 Qh5 23.Rh5 Kg8 24.Qh7) 22.Rh3 Qh6 (22...Qh4 23.Rh4 Kg8 24.Qh7) 23.Rh6 (23.Rh6 Kg8 24.Qh7) 1–0. guestpozf – guestvssr, private online chess game, 2018.

6.a4 Nbd7 7.Nf3 e6 8.Be2 Bd6 9.c4 0–0 10.0–0 Qc7 11.d4 dc4 12.Na3 Nb6 13.Nc4 Nc4 14.Bc4 Qe7 15.Qb3 c5 16.dc5 Bc5 17.Ne5 Nd7 18.Nd7 Bd7 19.Qc3 f6 20.Rfd1 Rfd8 21.Rd3 Kh8 22.Rad1 Be8 23.Be6! Rd3 24.Rd3 Bg6 25.Rd1 Qe6 26.Qc5 h6 27.Rc1 Re8 28.Bd4 Kh7 29.Qc7 Re7 30.Qa5 Rd7 31.Qc3 Qd5 32.f3 Qa2 33.a5 Rd5 34.Qc4 Qc4 35.Rc4 Rb5 36.Rc7 Kg8 37.Bb6 Rb1 38.Kf2 Rb2 39.Kg3 Bd3 40.Rb7 Bf1 41.Kf4 Rg2 42.h4 Kh7 43.h5 Rg5 44.Bd4 Kg8 45.Ra7 Rh5 46.Ra8 Kh7 47.a6 Rh4 48.Kg3 Rh3 49.Kf2 Bb5 50.Kg2 Rf3 51.Kh2 Rf2= 52.Kg1 Rg2 53.Kg2 Bc6 54.Kg3 Ba8 55.Kg4 Kg6 56.a7 Kf7 57.Bc3 g6 58.Kf4 Ke6 59.Bb2 Bb7 60.Bc3 h5 61.Bb2 h4 62.Kg4 g5 63.Kh3 Kf5 64.Ba3 Kg6 65.Be7 f5 66.Bd8 Kh5 67.Bc7 g4 68.Kh2 g3 69.Bg3 hg3 70.Kg3 Kg5 71.Kf2 Kf6 72.Ke2 Ke5 73.Kd3 Be4 74.Kc4 Ba8 75.Kd3 Kd5 76.Kc3 Kc5 77.Kd3 Be4 78.Kc3 Kb6 79.Kb4 Ka7 80.Kb5 Kb7 81.Kc5 Kc7 82.Kc4 Kc6 83.Kd4 Kb5 84.Kc3 Kc5 85.Kb3 Bd5 86.Kc3 Bc4 87.Kd2 Kd5 88.Kc3 Ba6 89.Kc2 Ke4 90.Kd2 Bb5 (90...Bb5 91.Kd1 Ke3 92.Kc2 Bd3 93.Kb3 f4 94.Kb4 f3 95.Kc5 f2 96.Kb4 f1Q 97.Kc5 Qf8 98.Kc6 Qd8 99.Kb7 Qd6 100.Ka8 Be4 101.Ka7 Qc7 102.Ka6 Bd3) 0–1. Ramos Moreno,FJ (2110) – Bernabe Duran,F (2255), Malaga ESP, City Ch, 2012.

6.a4 e6 7.Nf3 Bd6 8.c4 0–0 9.d4 dc4 10.Bc4 Qc7 11.Nbd2 Nbd7 12.Rc1 Nb6 13.Bd3 Bd7 14.0–0 Nfd5 15.Ne4 f6 16.Qb3 Rac8 17.Nd6 Qd6 18.Ba3 Nb4 19.Bb4 Qb4 20.Qb4 ab4 21.a5 Nd5 22.b6 (22.a6 ba6 23.ba6 Nc3+=) 22...Rfe8 (22...Nc3 23.Ra1=) 23.Nd2 e5 24.Nb3 ed4 25.Nc5 (25.Nd4?! Nc3=) 25...Re7? (25...de3 26.Nd7 Ra8 27.fe3 Ne3+–) 26.Nd7?? (better is 26.Nb7 de3 27.Nc5+–) 26...Re3?? (better is 26...Rd7 27.Bf5 Rcd8 28.Bd7 Rd7 29.ed4 Nc3=) 27.fe3+– (27…Rd8 28.Nc5 Ne3 29.Nb7+–) 1–0. Feilmayr,Erwin – Hasler,Ulrich, corr ICCF TT/6/02, 2004.

6.a4 Bf5 7.Nf3 Nbd7 8.Be2 h6 9.0–0 e6 10.c4 Bd6 11.d4 dc4 12.Bc4 0–0 13.Nbd2 Qc7 14.Be2 Ne4 15.Ne4 Be4 16.h3 Nf6 17.Nd2 Bd5 18.Bd3 Bb4 (18...cb5 19.e4 Bc4 20.Bc4 Bh2 21.Kh1 bc4 22.e5 Be5 23.de5+/–) 19.e4+= Bd2 20.ed5 Bf4 21.de6 fe6 22.Qe2 Rae8 23.bc6 bc6 24.Rfe1 Re7 25.Kh1 Nd5 26.Qg4 (26.Rab1 Qd6+=) 26...Rf6 (26...Bd6 27.f3 Qb7 28.Rab1+=) 27.Re2+= Bd6 28.Qe4 Qb8 (28...Nf4 29.Qh7 Kf8 30.Rc2 Nd3 31.Qd3=) 29.Rc1 (29.Bc1 Qa7+=) 29...Rc7 (29...Nf4 30.Qh7 Kf7 31.Rec2+=) 30.Ba1 g6 31.Rb1 (31.Qh4 Qb3 32.Bc4 Qa4=) 31...Rb7= 32.Rb7 Qb7 33.Rb2 Qf7 34.Re2 Nf4 35.Rc2 Nd3 36.Qd3 Rf2 (36...Qb7!? 37.Qe3 Bf4=) 37.Rf2+/– Qf2 38.Qg6 Kf8 ½–½. Gomez,Gustavo Daniel (2530) – Prokopp,Heinz (2455), corr World Ch Semifinal, 2003.

6.a4 Bf5 7.Nf3 Nbd7 8.Be2 h6 9.0–0 e6 10.c4 Bd6 11.d4 dc4 12.Bc4 0–0 13.Nbd2 Qc7 (13...Rac8 14.Rc1=) 14.Be2 Ne4 15.Ne4 Be4 16.h3 Nf6 17.Nd2 Bg6 (17...Bd5 18.Rc1=) 18.Rc1+= Nd5 19.Nc4 Bh2 (19...cb5!? 20.Ne5 Qe7 21.Ng6 fg6 22.Bb5 Rac8+=) 20.Kh1+/– Qb8 (20...Bd6 21.Nd6 Qd6 22.bc6 bc6 23.Rc5+=) 21.Ba3 Rd8 22.b6 Nb4 23.Qb3 Bd6 24.Nd6 Qd6 25.Rc5 Nd5 26.Ra5! Qd7 (26...Ra5 27.Bd6) 27.Ra8 Ra8 28.Bc5 Qd8 29.Ra1 Ra5 30.Bf3 Qh4 31.Kg1 Bh5 32.Bh5 Qh5 33.Qb2 (33.Qc2 Qg5+/–) 33...Qg5 (33...Ra4 34.Kh2 Ra1 35.Qa1=) 34.Qd2 Ra6 35.a5 Qd8 (35...Nf6 36.Qc2+/–) 36.e4 Nf6 37.Qf4 Qa8 38.Kh2 Ra5 39.Ra5 Qa5 40.Qb8 Kh7 41.Qb7 Qd2 42.d5 (42.Qc7 Qf2 43.Bb4 e5 44.Qe5 Nd7+/–) 42...cd5? (better is 42...Ne4!? 43.Qc6 Qb2+–) 43.Qc7+– d4? (43...Ne8 44.Qf7 Nf6+–) 44.b7 Qf2 45.Qg3 Qc2?? 46.Bd4 Nh5 47.Qd6 f6 48.b8Q (48...Qe4 49.Qdd8+–) 1–0. Alekseev,Vadim (2440) – Novitzkij,Dmitrij (2325), Petroff mem op, 2000.

6.a4 Bf5 7.Nf3 Nbd7 8.Be2 h6 9.0–0 e6 10.Nd4 Bh7 =.

6.a4 Bg4 7.f3 Bf5 8.Ne2 Nbd7 9.g4 Bg6 10.h4 h6 11.Nf4 Bh7 12.g5 Ng8 13.g6 Bg6 14.Ng6 fg6 15.Bd3 c5 16.Nc3 (16.Rg1!?+=) 16...Qd6+= 17.Rg1 Ne5 18.Be2 Nf7 19.b6 (19.f4 e5 20.fe5 Qd8=) 19...Qh2 20.Kf1 (20.Bb5 Kd8 21.Kf1 Nf6–/+ (worse is 21...Qh4 22.Nd5 Qh3 23.Rg2=)) 20...Qh3 21.Rg2 Nf6 22.Nb5 0–0–0 23.Kg1 Qh4 24.d3 Nd6 25.Rg6 (25.Qd2 Nb5 26.ab5+=) 25...c4 (25...Nf5 26.e4 de4 27.fe4 Ne4+=) 26.Qd2= cd3 27.Bd3 Nc4 28.Bc4 Qc4 29.Ra3 Qb4 (better is 29...Qh4=) 30.Rc3+– Kb8 31.Qh2 e5? (better is 31...Rd6 32.Ba3 Qb1 33.Kf2 Qd1 34.Bd6 ed6+–) 32.Qe5 Bd6 33.Nd6 Qd6 34.Rc7 Qe5 (34...Rhe8 35.Qd6 Rd6 36.Rcg7 Rb6 37.Bf6 Rbe6+–) 35.Be5 Ne8 (35...Rhe8 36.Bf4 Re6 37.Rc6 Ka8 38.Re6 Nd7 39.Rd6 Rc8 40.Rd7 h5 41.Rd5 Rc7 42.Rd8 Rc8 43.Rc8) 36.Rc5 1–0. marekt – Tacchino, internet, 2014.

6.Nc3 a4 7.Rb1 e5 8.Qc1 (better is 8.bc6!? bc6 9.Na4+=) 8...c5+= 9.d4 e4 10.Nge2 c4 11.Nf4 Be6 12.g3 g5 13.Ne6 fe6 14.Bg2 Bg7 15.Ba1 0–0 16.Rb4 Nbd7 17.Na4 Qd6 18.Nc3 b6 19.Nb1 Ng4 20.0–0 Rf7 21.Bc3 Raf8 22.Ra4 e5 23.h3 ed4 24.Bb4 (24.ed4 Rf2 (worse is 24...Nf2 25.Qg5 Rf5 26.Bb4–/+) 25.Rf2 Rf2 (25...Nf2?! 26.Qg5 h6 27.Bb4 hg5 28.Bd6=) 26.Qg5 Qg3 27.Ra8 Kf7 28.Qd5 Kf6 29.Qd6 Qd6 30.d5 Kg5 31.h4 Kh4 32.Be5 Qe5 33.Be4 Qh2) 24...Qh6? (24...Nc5 25.hg4 Qd7 26.Bc5 bc5 27.ed4 h6 28.dc5 Qb5+=) 25.Bf8+– (25.hg4 Ne5 26.Qd1 Rf3 27.Qe1 Ng4 28.Bh3 Qh3 29.Bf8 Qh2) 25...Rf8 26.hg4 Ne5 27.Qd1 (27.ed4?? Ng4 28.Rd1 Qh2 29.Kf1 Rf2 30.Ke1 Qg1 31.Bf1 Qf1) 27...Rf3 (27...d3+–) 28.Ra8 (28.Bf3?! Nf3 29.Qf3 ef3 30.Ra8 Kf7=) 28...Bf8 29.Rf8! (29.Bf3?! Nf3 30.Qf3 ef3+=) 29...Kf8 (29...Rf8 30.ed4 Combination; 29...Kf8 30.Bf3 Zwischenzug; 29...Qf8 30.Bf3 Zwischenzug) 30.Nd2 (30.Bf3? Nf3 31.Qf3 ef3–+) 30...Ng4 (30...Rf6 31.ed4 Nd7+–) 31.Nf3 1–0. Valenta,Vit (2210) – Banduka,Zeljko (2115), SVK–ch op–A Banska Stiavnica, 2007.

6.Bd3 c5 0–1. Walker,John T (1940) – Haznedaroglu,Kivanc (2290), WSTT/3/06/S1, 2008.

6.Bd4 c5 7.Bb2 Bg4 8.f3 Bf5 9.g4 Bg6 10.h4 h5 11.g5 Nfd7 12.Nh3 e5 Black prepares the advance d4 13.Nc3 d4 14.Nd5 Qd6 15.e4 (15.Bc4!?=) 15...Nb6=+ 16.c4 (16.Nb6 Qb6 17.Bc4 Bd6=+) 16...Nd5 17.cd5 Nd7 18.Rg1 a4 (18...Be7 19.Nf2–/+) 19.Bc4 (19.Nf2 Be7–/+) 19...Qc7 (19...Be7 20.d3–/+) 20.Bc1 (20.Qe2 Bd6=+) 20...Bd6 21.d3 Nb6 22.Ke2 (22.Nf2 0–0–/+) 22...Rg8 (22...0–0 23.Rb1–/+) 23.Qf1 0–0–0 24.Bd2 Nc4 25.dc4 b6 26.Qd1 Qa7–/+ 27.Kd3 Rge8 28.Qc2 Kb7 29.Nf2 Ra8 30.Rae1 Qb8 31.Nd1 Rg8 32.Nb2 f5 33.gf6= gf6 34.Bc1 Qc7 35.Rg2 f5 36.Qe2 Qh7 37.Reg1 fe4 38.fe4= Raf8 39.Rg3 Rf6 40.Qg2 0–1. Valles,A – Illescas Cordoba,Miguel (2545), Oviedo rapid, 1991.

6.Be2 cb5 7.Bd4 Qd8 =.

6.Nf3 cb5 7.Bd4 Qc6 8.Nc3 +=.

6.Nf3 cb5 7.Bd4 Qd6 +=.

6.Nf3 Nbd7 7.a4 e6 8.d4 c5 9.Be2 c4 10.0–0 (10.Nbd2 Qc7 11.c3 Bd6 12.0–0 b6 13.Qc2 Bb7 14.Ba3; 10.g3 Bd6 11.0–0 0–0 12.Nc3 Rd8 13.e4 Bb4 14.ed5; 10.Nc3 Bb4 11.0–0 0–0 12.Nd2 Rd8 13.h3 Nf8 14.Nf3) 10...Bd6 11.Ne5 (11.Nbd2 Qc7 12.Ba3 0–0 13.Bd6 Qd6 14.Qc1) 11...0–0 12.f4 (12.Nc3 Qc7 13.f4 b6 14.Qe1) 12...Qc7 (12...Ne4 13.c3 f6 14.Nf3) 13.Bf3 (13.Nc3 b6 14.Qe1) 13...Nb6 (13...b6 14.Nc3 Bb7 15.Qe1=) 14.Ba3 (14.Nc3 Nfd7+=) 14...Ne8= 15.Qd2 Ba3 16.Ra3 f6 17.Ng4 Nd6 18.Nf2 Bd7 19.e4 Ne4 (19...f5 20.e5 Ne4 21.Qe3=) 20.Ne4 de4 21.Be4 Be8 22.Nc3 Bh5 23.f5 e5 24.Nd5 Nd5 25.Bd5 1–0. Buczinski,Henryk (2185) – Siger,Csaba (2030), SA–2010–O–00156, 2010.

6.Nf3 Nbd7 7.c4 dc4 8.Bc4 cb5 9.Bd4 Qc6 10.Bf1 e5 11.Be5 b4 12.Bb2 b6 13.Nd4 Qc7 14.Nb5 Qc6 15.Qf3 Qf3 16.gf3 Rb8 17.Rg1 Rg8 18.d4 Bb7 19.e4 Nh5 20.Bc1 ba3 21.N1a3 Bb4 22.Kd1 Kf8 23.Nc4 g6 24.Bh6 Ke7 25.Kc2 Rbc8 26.Kb3 Rgd8 27.Rc1 Rc6 28.d5 Rc5 29.d6 Kf6 30.Nb6! Rc1 31.Bc1 (31.Bc1 Kg7 32.Nd7 Rd7 33.Bc4+/–) 1–0. Degterev,Pavel (2250) – Siger,Csaba (1730), CP–2010–P–00020, 2010.

6.Nf3 Nbd7 7.c4 dc4 8.Bc4 cb5 9.Be2 (9.Bd4 Qc6 10.Bf1 Nd5=) 9...e6 10.0–0 (10.Bd4 Bc5=) 10...b4 11.d4 Nd5 12.Qc1 (12.Bd3 Be7=+) 12...N7f6 13.Ne5 b3 (13...Be7 14.ab4 Bb4 15.Ba3=+) 14.Bd3 (14.a4 Bd7=) 14...Bd7 (14...Nd7 15.f4=) 15.e4 Rc8 16.Qg5 (16.Qd2 Nc7=) 16...Rc2 (16...Nc7 17.Nd7 Nd7 18.Rc1=) 17.Nd7+= Nd7 18.Bc2 bc2 19.ed5 Qb2 20.Nd2 Qd4 21.de6 fe6 22.Ra2 (22.Qa5!? Qd3 23.Rfc1+/–) 22...Qd3+= 23.Rc1 Ba3 24.Rcc2 0–0 25.Qa5 Bd6 26.Nf1 b6 27.Qa7 Bf4? (better is 27...Bb8 28.Qa4 Bf4+=) 28.Rd2!+– Bd2 (28...Qd2 29.Nd2) 29.Rd2 Qf5 (29...Qb5 30.Rd7 Qb2 31.f3+–) 30.Qd7 b5 (30...h6 31.Qb7+–) 31.Re2 (31...Qd5 32.Qe7+–; 31.Rb2 Rb8+–) 1–0. Fahrudin87 (2050) – Garfield85 (1920), internet, 2006.

6.a4 Bg4

7.Be2 Be2 8.Qe2 Nbd7 9.Nf3 e6 10.0–0 Bd6 11.c4 0–0 12.Rc1 Bb4 (12...cb5 13.ab5 Rfc8 14.Na3=) 13.Na3 Rac8 (13...Rfc8 14.d3=) 14.Nc2 (14.bc6 Rc6 15.d3 Rfc8+=) 14...Bd6 15.d4 Qd8 (15...dc4 16.Na3 cb5 17.Nb5=) 16.c5+= Bb8 (16...Be7 17.b6+=) 17.Nd2 (17.Qe1 b6+=) 17...b6= 18.Nb3 Qc7 19.g3 (19.f4 Ba7+=) 19...Qa7 (19...bc5 20.dc5 Ne4 21.Ne1+=) 20.Bc3 (20.Qe1!? Bc7 21.Na3+=) 20...Ne4= (20...bc5 21.Na5 Ne4 22.Nc6 Nc3 23.Qd3+–) 21.Be1 cb5 22.ab5 bc5= 23.Na5 Qb6 24.Nc6 Kh8 25.Rcb1 cd4 26.N2d4+= Ndc5 27.Ba5+/– Qb7 28.Bb4 Qb6 29.Rc1 e5 30.Ne7 Rce8 31.Ndf5+– g6 32.Nd5 Qe6 33.Nfe7 Bd6 34.f3 Nf6 35.Bc5+– Nd5 36.Ra6 Rd8 37.Nc6 Rc8 38.Qb2 f6 39.Qa2 Bc5 40.Rc5 Nc7 41.Na7 (41...Qd7 42.Nc8 Na6 43.ba6 (43.Qa6?! Qd1 44.Kf2 Qd2 45.Kf1 Qd1 46.Kf2 Qd2 47.Kf1 Qd1 48.Kf2=) 43...Rc8 44.Rc8 Qc8 45.a7+–) 1–0. pierre – Dimitri, internet, 2006.

7.Be2 Be2 8.Qe2 Nbd7 9.Nf3 e6 10.0–0 Bd6 11.Bf6 Nf6 12.bc6 bc6 13.c4 c5 (13...e5!?=) 14.Na3 0–0 15.d3 Rfb8 16.Rfc1 Qd8 17.Nb5 Qd7 18.Rd1 Qc6 19.Qc2 Rc8 ½–½. marekt – agrillage, schemingmind.com, 2005.

7.f3 Bd7 8.Na3 Qc7 9.c4 e5 10.Qb3 (10.b6 Qd6=) 10...Be7 (10...Bd6 11.Rc1 Qb6 12.d4 Bb4 13.Kf2=) 11.Rc1 d4 12.ed4 ed4 13.Bd4 (13.bc6 bc6 14.Bd4 0–0=) 13...0–0 14.Bd3 (14.c5 Re8 15.Ne2 Be6=) 14...Bd6 (14...c5 15.Bc3=) 15.b6 Qd8 16.c5 Re8 17.Ne2 Be5 18.0–0 Bf5 19.Nc2 (< 19.Bf5 Bd4 20.Nd4 Qd4 21.Kh1 Na6=) 19...Bd3 20.Qd3 Na6 21.Qc3 (21.Qc4 Qe7 22.Rfe1 Nd7+/–) 21...Bh2 (21...Nd7 22.Qa3 (< 22.Qa5 Nac5 23.Qc3 Na4–+) 22...Bd4 23.Ncd4=+) 22.Kh2 Re2 23.Bf6 gf6 Attacks the backward pawn on d2 (23...Qf6 24.Qf6 gf6 25.d4+=) 24.d4 Nb4 25.Nb4 ab4 26.Qc4 Qe7 (26...Qb8 27.f4 Qe8=) 27.Rfd1 Rd8 28.d5 Qe5=+ 29.Kh1 cd5 30.Qg4 Kh8 31.c6 bc6 32.Rc6= f5 33.Qh4 Rg8 Attacking the backward pawn on g2 34.Qf6 Qf6–/+ 35.Rf6 Rgg2 36.Rh6 Rg8 37.a5 Ra2–/+ 38.b7 Ra5 39.Rb6 Rb8 40.Rc1 Kg7 41.Rc8 (41...Rb7 42.Rb7+–) 1–0. Hirth,M – Semkov,Semko (2480), Wuerzburg op 8th, 1992.

7.Nf3 Nbd7 8.h3 Bf3 9.Qf3 Rc8 10.Na3 e6 11.Bd3 Be7 12.0–0 Nc5 13.Bd4 Qc7 14.Rfc1 (14.Be2!?=) 14...0–0=+ (< 14...Na4 15.bc6 bc6 16.Nb5 cb5 17.Bb5 Kf8 18.Ra4+=) 15.Bf1 Nfe4 16.Qd1 (16.Bc5 Nc5 17.d4 Na4 18.bc6 bc6=+) 16...Bd6 17.g3 e5 18.Bc5 Nc5 19.Nb1 (19.bc6 A) 19...Na4? 20.Nb5 Nb2 21.Nc7 Nd1 22.Nd5+– (22.Rd1?! Rc7 23.cb7 Rb7+–); B) 19...Qc6?! 20.Nb5=; C) 19...bc6 20.c4 Rfe8=+) 19...f5 (19...cb5 20.Nc3=+) 20.d4 ed4 21.ed4 Ne4 Black intends f4 22.c4 f4 23.g4 f3 24.Ra2 Qf7 (24...cb5 25.Bd3 Bh2 26.Kh1–+) 25.Nd2 (25.c5 Bb8 26.Bd3 Qf4–+) 25...Ng5 26.Bd3? (26.c5 Bb8 27.Nc4=+) 26...Qf4 (26...Nh3?! 27.Kf1–+) 27.Nf1 Nh3 28.Kh1 Qg4 29.Ng3 Nf2! (29...Qd4?? 30.Bh7 Kh7 31.Qd4+–; 29...Bg3 30.fg3 Qg3 31.bc6–+) 30.Rf2 Decoy to f2 30...Bg3 (31.Qc2 Bf2 32.Qf2 Rf6–+) 0–1. Larsen,Bent – Garcia,J, Arrecife de Lanzarote, 1976.

7.Nf3 Nbd7 8.h3 Bf3 9.Qf3 Rc8 10.Nc3 e5 11.Rb1 Bb4 12.Be2 0–0 13.0–0 Rfe8 (13...d4 14.ed4 ed4 15.Ne4=) 14.bc6 (14.Qf5 Rb8=) 14...bc6 15.Ba1 Qc5 16.Rfd1 d4 (16...Bc3 17.Bc3 d4 18.ed4 ed4 19.Ba1=) 17.ed4 (17.Na2 Qc2 18.Nb4 ab4 19.ed4 e4=+) 17...ed4 18.Na2 Qc2 19.Nb4 ab4 The passed pawn on a4 will become decisive later 20.Bd4 c5 (20...Qa4? 21.Ra1 Qc2 22.Bd3 Qd1 23.Qd1+–) 21.Bf6 Nf6 22.a5 Qe4 (22...Rcd8 23.Bb5 Re5 24.a6=) 23.Qe4= Ne4 24.Rb2 (24.f3 Nd6 25.Kf2 Rb8=) 24...Re7 (24...Nd6 25.Kf1=) 25.Rc1 (25.a6 Rce8=) 25...Nd6 (25...Rd8 26.Rcc2=) 26.d4 (26.Bg4 f5 27.Bf3 Ra7=) 26...c4 27.Bc4 Nc4 (27...Rec7 28.Rb4 Rc4 29.Rcc4 Rc4 30.Rc4 Nc4 31.a6=) 28.Rb4 Nd6 29.Rc8 Nc8 30.Rb8 Re8 31.a6 Kf8 32.Rb7 (better is 32.d5!?+=) 32...Nd6=+ 33.Rd7 Nb5 34.Rb7 (34.d5 Ra8 35.Rb7 Nd6–+) 34...Nd4–/+ 35.a7 Nc6 36.Rc7 Nb4 37.Rb7 Na6 (37...Nd5 38.Kf1=+) 38.f4 g6 (38...h5 39.Kf2=+) 39.Kf2 Kg7 (39...h5 40.g4=+) 40.Rb6 Nc7 ½–½. Benassi,Aspasio – Pommerel,Wim, corr TKM/SF/01, 2001.

7.Nf3 Nbd7 8.h3 Bf3 9.Qf3 e5 10.Nc3 =.

6.Nf3 Bg4

7.a4 Nbd7 8.h3 Bh5 9.c4 e6 10.Nc3 Bb4 (10...Bd6 11.cd5 Bf3 12.Qf3 cd5 13.d4=) 11.Rc1 0–0 12.Be2 dc4 13.Bc4 Ne5 14.Qe2 cb5 (14...Nc4 15.Qc4 Rac8 16.bc6 Bf3 17.gf3 Rc6 18.Qb5=+) 15.Bb5 Rad8 (better is 15...Nf3 16.gf3 Rac8=+) 16.0–0 (better is 16.g4 Nf3 17.Qf3=+) 16...Bf3–/+ 17.gf3 Rd2!! (18.Nd5 Nd5–+ (< 18...Rd5 19.Rfd1 Qd6 20.f4–+)) 0–1. McGeary,William – Oshiro,Michael, NWC August op, 1990.

7.Bd3 Nbd7 =.

7.h3 Bd7 8.Nc3 (8.Be5=) 8...e6 (better is 8...cb5 9.Bd3 e6=) 9.Na4+/– Qd8 10.Bd4 Bd6 (10...cb5 11.Nb6 Ra6 12.Nd7 Nbd7 13.Bb5+/–) 11.Rb1 (11.Nb6 e5 12.Na8 ed4 13.Nd4 cb5+=) 11...0–0 (11...cb5 12.Nb6 e5 13.Na8 ed4 14.Nd4 Na6=) 12.c4 (12.Nb6!? c5 13.Bc5 Bc5 14.Na8+=) 12...dc4 13.Nb6 e5 14.Be5 Qb6 15.Bd6 Rc8 16.Bb8 Rab8 17.Bc4 cb5 18.Qb3 Bf5 (18...a4 19.Qa2 Be8=) 19.Bf7 (19.d3 Rc4 20.Qc4 Qe3 21.fe3 bc4+/–) 19...Kh8 (19...Kf8 20.d3 (20.Qb5?? Qb5 21.Rb5 Bd3–+) 20...a4 21.Qb2 Kf7 22.e4–/+) 20.0–0 Bb1=+ 21.Rb1 b4 22.Be6?? a4!–+ 23.Qa4 A deflection 23...Qe6 24.Rb4 Rc1 25.Kh2 Qd6 26.g3 Qc6 27.Qc6 Rc6 28.Ne5 Rc7 29.Kg2 Kg8 30.Kf3 Rf8 31.Ke2 Nd7 32.Nd3 Ra8 33.a4 b6 34.e4 Rca7 35.Nb2 Nc5 36.d3 Na4 37.Na4 Ra4 38.Rb6 Rd8 39.Rb3 g5 40.Ke3 h6 41.f4 gf4 42.gf4 Ra1 43.e5 Re1 44.Kf3 h5 45.Kf2 Rd1 46.Ke3 Rh1 47.Ke4 Re1 48.Kf3 Rf8 49.Rb5 Rf1 50.Ke3 R8f4 51.e6 Rf6 52.Ke2 R1f5 53.Rb8 Rf8 54.Rb6 Re5 55.Kd2 Re8 56.d4 R5e6 57.Rb5 Re2 58.Kd1 Rh2 59.Rg5 Kf7 60.Rh5 Ra8 (61.Rc5 Raa2 62.Rc7 Kg6 63.Rc6 Kh5 64.Rc5 Kh4 65.Rc2 Rhc2 66.d5 Rg2 67.d6 Ra1) 0–1. Poley,Vladimir (2330) – Carlsson,Pontus (2400), It, Stockholm SWE, 2002.

7.h3 Bd7 8.bc6 Nc6 9.Bf6 ef6 10.Nc3 =.

7.h3 Bh5 8.Nc3 =.

7.h3 Bh5 8.c4 Nbd7 9.cd5 cd5 10.d4 (10.Nc3 e6=) 10...e6 11.Nbd2 (11.g4 Bg6=+) 11...Bd6 12.Bd3 (12.Rc1 0–0=+) 12...0–0=+ 13.0–0 a4 (13...Rac8 14.Qa4=) 14.Qe2 (14.Rc1 Bg6 15.Be2 Ne4=) 14...Rfc8 15.Rfc1 e5 (15...Rab8 16.Rab1=) 16.de5 Be5 17.Be5 (17.Ne5 Exploits the pin 17...Be2) 17...Ne5 18.Bf5 Bf3 19.Rc8 Rc8 20.Nf3 Nf3 21.Qf3 Rc3 22.Qf4 Qb5=+ 23.Rb1 Rb3 24.Rc1= g6 Black gets strong initiative 25.Bg6 hg6 26.Qf6 Rb1 27.Qc3 Rc1 28.Qc1 Qc4 29.Qb2 b5 30.Kh2 Qb3=+ 31.Qe5 Qa3–/+ 32.Qe8 Kg7 33.Qe5 Kh7 34.Qd5 Qb3–+ 35.Qd4 Qc4 36.Qa7 Kg7 37.f4 Qc3 38.e4 Qc4 39.f5 Qe4 40.fg6 Kg6 41.Qb8 b4 42.Qg8 Kf6 43.Qd8 Kg7 44.Qg5 Qg6 45.Qe5 Qf6 46.Qg3 Kh7 47.Qd3 0–1. Winiger,Albert – Tschoepe,Frank, TT–09 ETC, 2003.

5.c4 ab4

6.c5 Qc5 7.ab4 Qb4 8.Ra8 Qb2 9.Rb8 Kd8 10.Nc3 (10.Ra8 e5+–) 10...Qa3 (10...e5 11.Nh3+–) 11.Qg4 (11.Na4 Qd6 12.Ra8 Qc7+–) 11...e6 12.Qa4 (12.Nh3 Nh6 13.Qh4 f6+–) 12...Qa4 13.Na4 b5 (13...Kc7 14.Ra8+–) 14.Nb6 Ne7 15.Nc8 Nc8 16.Nf3 f6 (16...Kc7 17.Ra8+–) 17.Nd4 (17.d4 Kc7 18.Ra8 Bd6+–) 17...Kd7 (17...Kc7 18.Ra8 Kb7 19.Ra2+–) 18.Rb7 (18.Nc6 Bd6 19.Bb5 Bb8 20.Nb8 Kd6+–) 18...Kd6 19.Be2 e5 (19...g6 20.Nb3+–) 20.Nf5 Ke6 (20...Kc5 21.0–0 Nd6 22.Rc1 Nc4 23.d3+–) 21.Bg4 b4 (21...d4 22.Ng3 Kd5 23.Bc8 de3 24.fe3+–) 22.Ng7 (better 22.d4 ed4 23.ed4 Ne7 24.Ne7 f5 25.Nf5 Kf6+–) 22...Kd6 23.Ne8 Kc5 24.Bc8 Bd6 (24...Kc4+–) 25.Ke2 Re8 (25...Kc4 26.Nd6 Kc5 27.Rc1 Kd6 28.Rd7 Ke6 29.Rc6 Kf5 30.Rg7 Rc8 31.g4 Ke4 32.d3) 26.Rc1 1–0. GuestKMYB – GuestXZNX, freechess.org, 2018.

6.c5 Qc7

7.ab4 Ra1

8.Ba1 Na6 9.Qa4 b5 10.cb6 Qb6 11.b5 Nc5 12.Qa8 Qb7 13.Qb7 Bb7 14.Nf3 f6 15.d4 Nb3 16.Bc3 Nh6 17.b6 g6 18.Nbd2 Nc1 19.Bb2 Na2 20.Be2 Bg7 (20...Kd7 21.0–0 Bg7 22.Nb3+–) 21.Nb3 0–0 (21...Nf5 22.Kd2 Nd6 23.Ra1 Ne4 24.Ke1+–) 22.Nc5 Rb8 23.0–0 Bc8 24.Ra1 Nb4 25.Ra7 Nf5 26.b7 Nd6 (26...Bb7 27.Nd7 Rd8 28.Rb7 Nd6+–) 27.Ra8 Rb7 28.Nb7 Ne4 (28...Nb7 29.Rc8 Kf7 30.Rb8+–) 29.Rc8 Kf7 30.Nd8 Ke8 31.Nc6 Kd7 32.Rg8 Nc6 33.Rg7 Ke8 34.Rh7 Kf8 35.Rh8 Kg7 36.Rc8 Na5 37.Ne1 (37.Rc7 Kg8+–) 37...Nb3 38.Nc2 (38.Rc7 Kh6+–) 38...f5 39.Nb4 e6 40.Rc7 Kf6 41.Nd3 g5 42.Ne5 Nd6 (42...g4 43.Ba3 Nd4 44.ed4 f4 45.Rh7 Nd6 46.Bd6 f3 47.Be7 Kf5 48.Bd3 Kf4 49.Rf7) 43.Ba3 f4 (43...g4 44.Bd6 Nd2 45.Rf7 Kg5 46.h4 gh3 47.f4 Kh4 48.Rh7 Kg3 49.Rh3) 44.Bd6 (44.Bd3 g4 45.ef4 Nd4 46.Ng4) 44...Kf5 (44...g4 45.Rf7 Kg5 46.Be7 Kh6 47.Bd3 Nd4 48.Rh7) 45.Rf7 Ke4 46.Bd3 1–0. rcm06 (1960) – latouche, gameknot.com, 2012.

8.Ba1 Na6 9.Qa4 e5 10.Nf3 f6 11.Ba6 ba6 12.0–0 =.

8.Ba1 Na6 9.Qa4 e6 10.Nf3 (10.Nc3 Nf6=) 10...b5 11.Qa3 Nf6 (11...f6 12.d4=) 12.Be5 Qb7 13.d4 Be7 (13...Nd7 14.Bd3+=) 14.Nbd2 (14.Bd3 0–0+=) 14...0–0 15.Bd3 Bd7 16.Nb3 (16.Ng5 Ra8 17.Qc3 h6+=) 16...Ra8= 17.Na5 Qa7 18.Ke2 (18.0–0 Nb4 19.Qb4 Qa5=+) 18...Nb4=+ 19.Ra1 (19.Qb4 Qa5) 19...Nd3–/+ 20.Qd3 h6 21.Nd2 Bd8 22.Ndb3=+ Qa6 23.h3 Qc8 24.f3 Nh7 25.Qc3 Ra7 26.Ra2 Qa8 27.Qa1 Bc8 28.Kd3 b4 29.Kc2 Ba6 30.Kb2 Bg5 31.f4 Bh4 32.g3 Bd8 33.Bb8 Qb8 34.Nc6 Qb5 35.Na7 Qe2 36.Kc1 Qe3 37.Rd2 Bc4 38.Na5 Nf6 39.N7c6 Ne4 40.Qb2 Ba5 41.Na5 Nd2 42.Qd2 Qa3 0–1. Lauermann,Answarth – Dreckmeier,Dirk, Werther Schloss op 3rd, 1997.

8.Ba1 Na6 9.Bc3 e5 =.

8.Ba1 b5 9.cb6 Qb6 10.Qa4 Nf6 11.Be2 e6 12.Nf3 Qb4 13.Qb4 Bb4 14.0–0 Ba6 15.Ba6 Na6 16.Bf6 gf6 17.d4 Ke7 18.Nbd2 c5 19.Ra1 Ra8 20.dc5 Bc5 21.Nb3 Bd6 22.Nfd4 Nc7 23.Ra8 Na8 24.g4 Nb6 25.Nc6 Kd7 26.Ncd4 Nc4 27.Kg2 Ne5 28.h3 Nc6 29.Nb5 e5 30.Nd6 Kd6 31.Kg3 Ne7 32.h4 h6 33.h5 f5 34.f3 fg4 35.fg4 f6 36.Kf3 Nc6 37.Kg3 d4 38.ed4 Nd4 39.Nd2 Kd5 40.Kf2 e4 41.Ke3 Nc2 42.Kf4 e3 43.Nf3 Ke6 44.Ke4 e2 45.Kf4 e1Q 46.Ne1 Ne1 47.Ke4 Nc2 48.Kf4 Nb4 49.Ke4 Nd5 50.Kd4 Ne7 51.Ke4 f5 52.gf5 Kf6 53.Kf4 Nf5 54.Kg4 Ng7 55.Kh4 Kf5 56.Kh3 Kg5 57.Kg3 Nh5 58.Kh3 Nf4 59.Kg3 h5 60.Kh2 h4 61.Kg1 h3 62.Kh2 Kg4 63.Kg1 Kg3 64.Kh1 Nd3 65.Kg1 h2 66.Kh1 Nf2# 0–1. Trkn – umbro, itsyourturn.com, 2000.

8.Ba1 b6 9.d4 b5 (9...e5!?=) 10.Nf3 Nf6 11.Bd3 Bg4 12.Nbd2 e6 13.0–0 Be7 14.h3 Bh5 15.Bc3 0–0 16.Qa1 Bf3 17.Nf3 Ne4 18.Be4 de4 19.Ne5 Nd7 20.Nd7 Qd7 21.Qb2 Qd5 22.Ra1 Rd8 23.Ra7 Bf6 24.Qa3 Qc4 25.Ra8 h6 26.Rd8 Bd8 27.Qb2 Bf6 28.g4 Kh7 29.Kg2 Qd3 30.Qd2 Qd2 31.Bd2= Kg8 32.f3 Kf8? 33.fe4+/– e5 34.d5+– Ke8 35.dc6 Kd8+/– 36.Bc3 Kc7 37.Kf2 Kc6 38.Ke2 g6 39.Kf3 Bg7 40.Be1 f6 41.h4 g5 42.hg5 hg5 43.Bc3 Bf8 44.Ke2 Be7 45.Kd3 Bd8 46.Kc2 Bc7 47.Kd3 Bb8 48.Kc2 Bc7 49.Kd3 Bb8 50.Kc2 Bc7= ½–½. Fournier,Frederic (1990) – kamimoto1 (2095), Echecs21 (2/2), 2003.

8.Ba1 e6 9.Nf3 Na6 10.Be5 Qd8 11.Ba6 ba6 12.0–0 Nf6 13.Nd4 Bb7 14.f4 Ne4 (better is 14...a5!?+=) 15.d3+/– Nf6 16.f5 Nd7? (better is 16...ef5 17.Nf5 a5+/–) 17.Ne6!+– fe6 (17...Qe7 18.Ng7 Bg7 19.Bg7 Rg8+–) 18.Qh5 (18.Qh5 g6 19.fg6+–) 1–0. Pcmvr – Guillem, playchess.de, 2004.

8.Ba1 Bf5 9.Nf3 Nd7 10.d4 e6 11.Bd3 (11.Nh4 Bb1 12.Qb1 Ngf6=) 11...Bd3 12.Qd3 Ngf6 13.Nc3 Be7 14.0–0 0–0 15.b5 b6 ½–½. Franke,Roland – Harzer,Paul, Bahn–chT Bernkastel–Kues, 1995.

8.Ba1 Bf5 9.Nf3 Nd7 10.Be2 =.

8.Ba1 Bf5 9.Nf3 Nf6 10.Be5+= Qc8 11.Nc3 (11.d4 Nbd7+=) 11...Nbd7 12.Qa4 (12.Bf4 b6+=) 12...e6 13.Be2 Be7 14.0–0 0–0 15.d4 Be4 (15...Ne4 16.Rc1=) 16.Bg3 (16.Bf6 Nf6 17.Ne4 Ne4+=) 16...Bf3 (16...b5 17.Qb3+=) 17.Bf3 Ne8 (17...b5 18.Qa7+/–) 18.Ra1+/– Nef6 19.Qa7 b6 (19...Re8 20.Be2+/–) 20.Ne2 (20.cb6 Qd8 21.b7 Nb8+–) 20...Ne4? (better is 20...bc5!? 21.bc5 e5 22.Be5 Bc5+=) 21.Be4+– de4 22.Qa2 (22.cb6 Qd8+–) 22...Nf6 23.Nc3 Qd7 24.Qb1 Nh5 25.Qe4 Ng3 26.hg3 Rd8 27.Ra6 Bf6 28.f4 Be7 29.Na4 f5 30.Qc2 Bf6? 31.Nb6+– Qf7 32.Nc4 Rd7 33.Nd6 Qe7 34.Qc4 h6 35.Ra8 Kh7 36.Re8 (36...Qe8 37.Ne8+–) 1–0. Tumurbator,Purev (2365) – Kerr,Brian (2200), Nice ol (Men) fin–C, 1974.

8.Ba1 Nf6 9.Nf3 Nbd7 10.Bf6 Nf6 11.d4 g6 12.Nc3 Bg7 13.Be2 0–0 14.0–0 Nd7 15.Qb3 e5 16.Ra1 Re8 17.Ra7 Qb8 18.Ra2 b6 19.cb6 Qb6 20.de5 Ne5 21.Nd4 Ng4 22.Rd2 Qc7 23.Bg4 Bg4 24.h3 Be6 25.Na4 Rb8 26.Nc5 Bc8 27.Ra2 Bf8 28.Qc3 Bd6 29.Nd3 Rb6 30.Ra8 Qb7 31.Ra4 h6 32.Nc5 Qb8 33.f4 Kh7 34.Qa3 Bc5 35.bc5 Rb1 36.Kh2 Qc7 37.Ra7 Rb7 38.Ra6 Bd7 39.Rb6 Ra7 40.Qb2 f6 41.Rb8 Kg7 42.Qb6 Kf7 43.g4 g5 44.Qb1 Kg7 45.Re8 Qa5 46.Re7 Kf8 47.Rh7 (47.Rh7 Qa2 48.Qa2 Ra2 49.Kg3+–) 1–0. Yarmolyuk,Yury (2130) – Beekes,Noud, CP–2006–P–00068, 2006.

8.Ba1 Nf6 9.f4 b6 10.Bf6 (10.Be5 Qb7=) 10...ef6=+ 11.d4 bc5 (11...Be7 12.Bd3=) 12.bc5= Qa5 (12...Qe7 13.Qb3 Na6 14.Nf3=) 13.Kf2 Na6 14.Qd2 Nb4 15.Nf3 Be7 16.Be2 0–0 17.Nc3 Bf5 18.Rc1 Qa3 (18...Ra8 19.Kg1=) 19.Nh4+= Bd3? (better is 19...Bg4!+=) 20.Nd5!+– cd5 (20...Nd5 A deflection 21.Bd3) 21.Rc3 A double attack 21...Qa1 22.Rd3?? (better is 22.Bd3 Nd3 23.Qd3+–) 22...Nd3=+ 23.Qd3 Rb8 24.Qa6 (24.Qf5 Qa2=) 24...Qb1 25.Qa7 Bf8 26.Qd7 Rb2 (26...Qa2 27.Nf5=+) 27.Nf3 (27.Qd5!? Qd3 28.Qh5=) 27...Qa2 (27...Qe4 28.Ne1=) 28.Ng1 Rb1 29.Nf3 Rb2 (29...g6 30.f5=) 30.Ng1= g6 31.c6 (31.Qd8!?=) 31...Rc2–/+ 32.Kf3 Rc3 33.Kg3 (33.g3!?–/+) 33...Qd2–+ (33...Re3 34.Bf3 Qd2 35.c7 Qe1 36.Kh3=) 34.Bf3? (better is 34.c7 Qe1 35.Kh3 Qg1 36.c8R Rc8 37.Qc8 Qe3 38.Bf3–+) 34...Qe1 35.Kh3 Qg1 36.Bd5 Qe3 (better is 36...Re3 37.Bf3 Qf1 38.Kh4–+) 37.g3 Qe7 (38.Qe7 Be7–+) 0–1. Campora,Daniel Hugo (2545) – Rodriguez,Andres (2530), I Torneo Iberoamericano, 2004.

8.Ba1 e5

9.Be2 Bf5 10.Nf3 Nd7 11.Ng5 Be7+= 12.h4 (12.f4!?+=) 12...h6–/+ 13.Nf7? (better is 13.Nf3–/+) 13...Kf7–+ 14.Bh5 (14.f4 Ngf6 15.0–0 Ra8–+) 14...g6 15.Be2 Ngf6 16.Nc3 Ra8 17.Bb2 b6 (better is 17...d4 18.Qb3 Kg7–+) 18.f4 (18.g4 Be6 19.g5–+) 18...ef4 19.0–0 (19.h5 fe3 20.hg6 Bg6–+) 19...bc5 20.Rf4 (20.b5 d4 21.Qb3 Kg7 22.bc6 dc3 23.Qc3 Qc6–+) 20...Bd6 (better is 20...cb4 21.g4 bc3 22.Bc3–+) 21.Rf1 (21.Rf5 gf5 22.b5 cb5 23.Bb5 Bh2 24.Kf1 Ne5–+) 21...cb4 22.Nd5 (22.Na4 Ne4 23.Rf3 Ke7–+) 22...cd5 23.Qb3 (23.Bb5 Ne5 24.h5 Qc2 25.hg6 Kg6 26.Qc2 Bc2–+) 23...Nc5 24.Qb4 Nd3 (better is 24...Nce4 25.Qb3 Nd2 26.Qc3 Bh2 27.Kh1 Qc3 28.Bc3 Nf1 29.Bf1–+) 25.Bd3 (25.Qc3 Bh2 26.Kh1 Nb2 27.Qb2–+) 25...Bb4 (25...Bb4 26.Bf5 gf5 27.Rf5 Ra6–+; 25...Bd3 26.Rf6 Kg8 27.Rd6+=) 0–1. queensservant (1810) – towa (1805), gameknot.com, 2014.

9.Nf3 Nd7

10.d4 e4 11.Nfd2 b6 12.Nc3 Bb7 13.Qa4 Nh6 14.Qa7 Qc8 15.Bb2 b5 16.Nb3 Qb8 17.Qb8 Nb8 18.Na5 Ba6 19.Be2 Be7 20.0–0 Kd7 21.Ra1 Bg5 22.Nb3 Rc8 23.h3 f5 24.Nd2 f4 25.ef4 Bf4 26.Bc1 Nf5 27.Bg4 g6 28.Ne2 Bc7 29.Nf1 Rf8 30.Nfg3 Rf7 31.Nf5 gf5 32.Bh5 Rf8 33.Bh6 Rg8 34.Bf7 Rh8 35.Nf4 Ke7 36.Bd5 cd5 37.Nd5 Kd7 38.Nc7 Kc7 39.Bf4 Kb7 40.d5 Rg8 41.f3 ef3 42.g3 Rg6 43.Re1 Nc6 44.dc6 Kc6 45.Rd1 Bc8 46.Kf2 Re6 47.Kf3 Bd7 48.Rd3 Be8 49.Rd8 Bh5 50.Kf2+– (withdrawal). Schirmer,Michael – Markus,Roland, corr TKM/A005, 1999.

10.Be2 e4 11.Nd4=.

10.Be2 f5 11.Qc2 (11.0–0 Ngf6+=) 11...g6 (11...Nh6 12.0–0+=) 12.0–0 Be7 13.Bc3 Nh6 (13...Ngf6 14.d4 e4 15.Ne5+=) 14.Qb2 e5 becomes the focus of attention 14...Nf7 15.d3 (15.Ne5 Nfe5 16.f4 Bf6+=) 15...0–0 16.Nbd2 Re8 (16...b6 17.cb6 Qb6 18.Qc2=) 17.Ra1 b6 18.cb6 Qb6 19.Ne5 Nfe5 20.Be5 Ne5 21.Qe5 Qb4 22.Nf3 Qd6 23.Qd6 (23.d4!?+=) 23...Bd6= 24.d4 f4 25.Ra8 Bd7 26.Re8 Be8 27.ef4 Bf4 28.Bd1 (28.Ba6 Bd7=) 28...Kf8 29.Ba4 Ke7 30.Kf1 h6 31.Ke2 g5 32.h3 Kd6 33.g3 Bc1 34.Ne5 Bh5 35.g4= Be8 36.Nd3 Ba3 37.f4 gf4 38.Nf4 Bb2 39.Ke3? Bd4!–+ 40.Kd4 c5 41.Ke3 Ba4 42.h4 Bc2 43.g5 hg5 44.hg5 d4 45.Kd2 Be4 46.g6 c4 47.g7 Bh7 48.Ng6 Bg8 49.Nf4 Ke5 50.Ng6 Kf6 51.Nh4? Bh7 52.g8N Bg8 (53.Nf3 d3–+) 0–1. Mehlhorn,Wolfgang – Kleeschaetzky,Rainer, corr DDR, 1980.

10.Be2 Ngf6 11.0–0 g6 12.Nc3 e4 13.Nd4 Bg7 14.d3 ed3 15.Bd3 0–0 16.h3 Ne5 17.Be2 h5 18.Qa4 g5 19.Qc2 g4 20.Nf5 gh3 21.gh3 Qd7?! 22.Nd5 cd5 23.Ng7 Kg7 24.Be5 Rg8 25.f3 Qh3 26.Kf2 Qh4 27.Bg3 Qg5 28.Rg1 Bf5 29.Qc3 Kh7 30.Qd4 Bc2 31.b5 Qf5 32.Qf4 Qf4 33.Bf4 Rg1 34.Kg1 Ba4 35.Bd3 Kg8 36.c6 bc6 37.b6 c5 38.b7 Nd7 39.Bf5 Bc6 40.Bd7 Bb7 41.Be5 1–0. Trokenheim – Albarran, email CTON 1996.

10.Be2 Ngf6 11.Qc2 Be7 12.0–0 0–0 13.Qb2 (13.d3 Re8=) 13...e4 14.Nd4 Re8 (14...b6 15.Nf5 Bd8 16.Qc2=) 15.Rc1 Bf8 16.d3 (16.Qc2 Be7=) 16...ed3 17.Bd3 Ng4 18.g3 (18.Nf3 Nde5 19.Ne5 Ne5= (< 19...Re5 20.h3 Rh5 21.hg4 Qh2 22.Kf1 Bg4 23.f3+=)) 18...Nde5 (18...Nge5 19.Be2=) 19.Be2 Nf6 20.Qc2 Bg4 21.Bg4 Neg4 22.Nd2 h5 (22...Ne5 23.b5=) 23.N4f3 Qe7 (23...Be7 24.Bd4+=) 24.Re1 (24.h3 Nh6+=) 24...Ne4= 25.Ne4 Qe4 26.Qe4 de4 27.Nd2 f5 (27...b6 28.h3 Nh6 29.cb6 Bb4 30.Rd1+=) ½–½. Mehlhorn,U – Geuss,P, H–2078–D, 2001.

10.Be2 g6 11.0–0+= Bg7 12.d3 (12.Nc3 Ngf6=) 12...Ngf6 13.Qb3 0–0 14.Nbd2 Re8 15.e4 d4 (better is 15...b6=) 16.Ne5?? (better is 16.Nc4=) 16...Ne5 (16...Qe5 17.f4 Qe7–/+) 17.Bd4 Be6 18.Be5 (18.Qb2!? Neg4 19.f4–/+) 18...Qe5–+ 19.f4?? (better is 19.Qc2–+) 19...Qd4 (19...Bb3 20.fe5 Ne4 21.Nb3= (< 21.Ne4 Be5 22.Re1 Rd8=+; 21.de4?! Be6+=)) 20.Kh1 Bb3 (21.Nb3 Qb4–+) 0–1. Hasler,Ulrich – Bivens, corr ICCF TT–4–90, 1991.

5.c4 dc4

6.Bc4 Bf5 7.Bd4+= Qc7 8.Nf3 (8.ba5 e5 9.Bb6 Qd6+=) 8...Nd7 (8...ab4 9.ab4 Ra1 10.Ba1=) 9.Qb3 e6 10.0–0 (10.b5 c5 11.Bb2 Ngf6=) 10...Ngf6 11.Rc1 (11.b5 Bg4=) 11...Be7 (11...ab4 12.ab4 Ra1 13.Ba1=) 12.Bb2 (12.b5 0–0=) 12...0–0 (12...ab4 13.ab4 Ra1 14.Ba1=) 13.Nc3 White prepares b5 (13.Nd4 Bg6=) 13...Nb6 14.Be2 Nbd5 (14...a4 15.Qd1=) 15.Nd5 Nd5 16.b5 c5 17.d4 Qb6 18.Ne5 Rfd8 19.Nc4 Qc7 20.dc5 a4 21.Qa2 Bc5 22.Be5 Qe7 23.Qb2 f6 24.Bg3 b6 25.Bf3= Rac8?? 26.e4+– Bg6 27.ed5 ed5 28.Re1 Qf7 Black prepares the advance d4 29.Nd2 d4 30.Bd1 Qa7 31.Bf3?? d3?? 32.Bc6 Bd4+/– 33.Qb4 Be5?? 34.Qc4 Bf7+/– 35.Qe4 Bd4? 36.Rab1 Bc3 37.Red1 Rd4 38.Qe3 Bg6 39.Nf3 Rdd8 40.Nh4 Qf7 41.Ng6 Qg6 42.Be4 f5 43.Bd3 Re8 44.Qf3 Rcd8 45.Bc4 (45...Kh8 46.Rd8 Rd8 47.Qc3+–) 1–0. Kreuzer – Schmalfuss, tt Verb'Liga, 1981.

6.Bc4 Nf6 7.Qb3 e6 8.Bd4 Qd8 9.Nf3 b5 10.Be2 Bb7 11.ba5 Ra5 12.0–0 Be7 13.Rc1 Nbd7 14.Ne5 Ne5 15.Be5 0–0 16.Nc3 Qa8 17.a4 c5 18.f3 b4 19.Nb5 Bd5 20.Bc4 Bc4 21.Qc4 Rc8 22.Ra2 Nd7 23.Bb2 Bf8 24.Rca1 Nb6 25.Qg4 Qd5 26.h4 Qd2 0–1. Kucharkowski,Jens – Wendorff,Holger, 11.DDR–SFM/Finale, 1988.

6.Bc4 Nf6 7.b5 cb5 8.Qb3 e6 9.Bb5.

6.Bc4 Nf6 7.b5 Bg4 8.Qb3 e6 9.Nc3 (9.Bf6 gf6 10.d4 a4=) 9...Be7 10.Nf3 Nbd7 (10...Bf3 11.gf3 0–0 12.d3=) 11.d4 (11.bc6 Qc6 12.Bb5 Qd6+=) 11...0–0 12.Na4 Qc7 13.Rc1 Ne4 (13...Rac8 14.bc6 Qc6 15.Be2=) 14.Bd3 Bf3 15.gf3 Nef6 16.Rg1 (16.bc6 bc6 17.Qc2 Rac8+=) 16...Nd5 (16...Qh2 17.Rg3=+) 17.Ke2 (17.bc6 bc6 18.Rg2 Rab8+=) 17...f5 (17...Qh2 18.Rh1 Qc7 19.bc6 bc6 20.Bh7 Kh8 21.Be4 Kg8 22.Bd5 ed5 23.Qd5+–) 18.Rg2 (18.bc6 bc6 19.Qc2 Rac8= (< 19...Qh2 20.Qc6 Qd6 21.Qd6 Bd6 22.Rc6+/–)) 18...Bf6 (better is 18...Rad8!?=) 19.Bf5!+/– Qd6 (19...ef5 Theme: Deflection from d5 20.Qd5 Annihilates a defender: d5) 20.Be4 Kh8 (20...Rad8 21.Qc2 cb5 22.Bh7 Kh8 23.Nc3 Nc3 24.Bc3 Qa3 25.Ra1+–) 21.bc6 bc6 22.Qc2 c5 (22...e5 23.Qc6 Qc6 24.Rc6 Nf4 25.ef4 ed4 26.Rf6 Nf6 27.Ba8 Ra8 28.Bd4 Re8 29.Kd3+–) 23.Nc5 (23.dc5 Qa6 24.Bd3 Qc6 25.Bh7 Bb2 26.Qb2 Rf6+–) 23...Nc5 (23...Rab8 24.Nd7 Qd7 25.Ke1+–) 24.Qc5 Qa6 25.Qc4 (25.Bd3 Qb7 26.Bc3 Rfc8 27.Rg7 Bg7 (< 27...Kg7 28.Qd6 Nc3 29.Ke1–+; 27...Nc3?! 28.Qc3 Bg7 29.Bc4–+) 28.Ba5 Rc5 29.Rc5 Qb2 30.Bd2 Qa3–+) 25...Qb7 26.Bc3 Rac8 27.Bd5 (27.Qd3!? Qe7 28.a4 Qd7+–) 27...ed5+/– 28.Qd3 (28.Qa4+/–) 28...Be7 (28...Qe7 29.Bd2 Rc1 30.Bc1+/–) 29.Rcg1+– Rf7 30.Rb1 Qc7 31.Bd2 Qd7 (31...Bd6!?+/–) 32.Ba5+– Qh3 33.Rg3 Qh2 34.Rb7 (34.Ke1 Ba3 35.Bb6 Rc3 36.Qc3 Qh1 37.Kd2 Qb1+/–) 34...Rcf8 (34...Bd6 35.Rf7 Bg3 36.Be1+–) 35.Bb4 Bh4 36.Rf7 Rf7 37.Qb5 Rf8 (37...g6 38.Qb8 Bd8 39.Qd8 Kg7 40.Qd5+–) 38.Bf8 Bg3 39.Kd2 (39.Qd5 Qf2 40.Kd3 Qf1 41.Kc3 Qc1 42.Kb3 Qe3 43.Kc4+–) 39...Qf2+/– 40.Qe2 Qg1 41.Qd1 Qh2 42.Kd3 Qh5 43.Bc5 Qg6 (43...g5 44.e4+–) 44.e4 h5 45.Qh1 (better is 45.Qb3!? de4 46.fe4 h4+–) ½–½. Adam,Stefan – Schwarz,Hans, corr DDR–ch11 corr8284, 1982.

6.Bc4 Nf6 7.Bd4 Qd8 =.

6.Bd4 Qc7 7.ba5 Ra5 8.Nf3 b5 =+.

6.Bd4 Qc7 7.Bc4 e5=+ 8.Bb2 ab4 9.ab4 Ra1 10.Ba1 Bb4 11.Qb3 Bd6 12.f4 Nh6 (12...ef4 13.Bg7 b5 14.Bd3=) 13.Nf3 f6 14.fe5 fe5 15.0–0 (15.Nc3 b5 16.Be6 Rf8=+) 15...Bf5 (15...e4!? 16.Ng5 Bh2 17.Kh1 Be5–/+) 16.Ng5 Rf8 17.e4 Bc8 (17...Bg4 18.Rf8 Kf8 19.Be6 Bc5 20.Kh1=) 18.Rf8= Bf8 19.Be6 Na6 (19...Bd6!?=) 20.Bc8+= Qc8 21.Be5 Nc5 (21...Qg4 A) 22.Nh7? Qe4 23.Qe6 Be7 24.Qc8 Kf7 25.Ng5 Bg5 26.Qb7 Kg6 27.Qa6 Qb1 (27...Qe5?! 28.Qc6 Bf6 29.Qc2 Kh5 30.Kf1–+) 28.Qf1 Qc2–+; B) 22.Qe6 Be7 23.Bg7+=) 22.Qf3 Qg4 23.Nh7 Qf3 (23...Be7 24.d4 Qe4 25.Qe4 Ne4 26.Bg7=+) 24.gf3 +=. Gross,Wilhelm – Merten,Rainer, xviii/08, 1989.

6.Bd4 Qc7 7.Bc4 e5 8.Bb2 b5 9.Ba2 Nf6 =.

6.Bd4 Qc7 7.Bc4 e5 8.Bc5 ab4–/+ 9.Bf8 Kf8 10.Qb3 Qe7 11.Ne2 (11.Qb2 Bf5 12.ab4 Ra1 13.Qa1 Qb4–/+) 11...b5 12.Bd3 e4 13.Bc2 c5 14.Ng3 Be6 (14...Nf6 15.Qb2 Nc6 16.0–0–/+) 15.Qb2 Qf6 16.Qf6 Nf6 (< 16...gf6 17.Be4 (< 17.Ne4 Nd7–/+) 17...Ra4 18.d4+=) 17.Ne4? (better is 17.Be4 Ra4 18.Ke2–/+) 17...b3–+ 18.Nf6 (18.Bb3 Ne4 19.Be6 fe6 20.d3–+) 18...bc2 19.Nc3 Ra3!! 20.0–0 Ra1 21.Ra1 gf6 22.Nb5 Nc6 23.Nc3 Nb4 24.Ne4 Na2 (25.Nc5 c1Q 26.Rc1 Nc1–+) 0–1. Tschoepe,Frank – Zmolil,Josef, T15–11 ETC, 2004.

6.Bc4 ab4

7.Qb3 e6 8.ab4 Ra1 9.Ba1 Qb4 10.Qb4 Bb4 11.Bg7 +– .

7.ab4 Ra1=+ 8.Ba1 Qb4 9.Qc2 b5 10.Be2 Qa4 11.Qa4 ba4=+ 12.Bd1 Bf5 13.Na3 e6 14.Ba4 Nf6 15.Nc2 Bd6 16.Ke2 e5 17.Nf3= Nfd7 18.Rb1 Bg4 19.h3 Bf3 20.Kf3 Nc5 21.Bb3 Nb3 22.Rb3 Ke7 23.d4 (23...Nd7 24.Rb7+=; 23.Rb7 Nd7+=). Alvarez Villar – Hasek,Frantisek, TT–16 ETC, 2005.

7.Bd4 c5 8.Qb3 Nh6 9.Be5 =+.

7.Bd4 c5 8.Bc5 Qc5 9.Bf7 Kf7 10.ab4 Ra1 11.bc5 Be6 12.Ne2 Na6 13.Nec3 Nf6 14.0–0 Nc5 15.d4 Ncd7 16.d5 Bf5 17.Qf3 Bd3 18.Rd1 Nc5 19.Rd3 Nd3 20.g4 Ne5 21.Qf5 Neg4 22.e4 g6 23.Qe6 Kg7 24.e5 Ne4 25.Qg4 Nc3 26.Qf3 Rb1 27.Kg2 Rb3 28.e6 Rg8 29.d6 ed6 30.Qf7 Kh8 31.e7 Be7 32.Qb3 Bf6 33.Qb7 Be5 34.Qb4 Nd5 35.Qe4 Nf4 36.Kf1 Rf8 0–1. Kreuzer – Haag, 1984.

7.Bd4 Qc7 8.ab4= Ra1 9.Ba1 Nf6 10.Nf3 Bg4 11.Be5 Bf3 12.Bc7+= Bd1 13.Bb8 Bg4 14.b5 e6 15.f3 Bh5 16.Ke2 Be7 17.Nc3 0–0 18.Ba7 Ra8= 19.Bd4 c5 20.Bf6 Bf6 21.Ne4 Be7 22.Rc1 Bg6 23.Nc3 b6 24.g4 Bf6 25.f4 h6 26.Bd3 ½–½. De Visser,Arno – Feilmayr,Erwin, corr SOK–87–07, 1989.

7.Qb3 e6

8.ab4 Ra1

9.Ba1 Na6 10.b5 Nc5 11.Qb2. Gross.

9.Ba1 Qb4?? 10.Qb4 Bb4 11.Bg7 +–.

9.Ba1 Bb4?? 10.Bg7 Nd7 11.Bh8 +–.

9.Ba1 Nd7

10.Na3 Bb4? 11.Bg7 Bf8 12.Bh8 Qb3 13.Bb3 Ba3 14.Nf3 +–.

10.Na3 Ngf6 11.Nc2 Bd6 12.Nf3 Qc7 13.0–0 g5 14.Ng5 Rg8 15.f4 Rg5 16.fg5 Bh2 17.Kh1 Ne4 18.Be6 Increases the pressure on the backward pawn 18...Ng3 19.Kh2 Nf1 20.Kg1 Nd2 21.Bf7 Kf8?? 22.Qe6+– Qd8 23.Bh5 Qe7 24.Bg7! (24...Kg7 25.Qe7 Kh8 26.Bg4 h5 27.gh6 Nf3 28.gf3 Ne5 29.Qg7#) 1–0. Rosenhahn,Erwin – Andersson,Lars H, corr ICCF TT, 1991.

10.Bd4 c5 11.bc5 Qb3 12.Bb3 e5 =+.

10.Nf3 Qb4?? 11.Qb4 Bb4 12.Bg7 +–.

10.Nf3 Ngf6 11.Bc3 Bd6 12.0–0 Qc7 13.d4 b5 14.Bd3+= Nd5 15.Bd2 f5 16.Rc1 White fights for the Initiative 16...Qb7 17.Ng5 N7f6 18.Na3 Bd7 19.e4 fe4 20.Ne4 Ne4 21.Be4 Qb8 22.Qh3 Bf4 23.Qh5 g6 24.Bg6!+/– Kf8 25.Bf4 Qf4 26.Rf1 Kg7 27.Bb1+= Qd4 28.Qg5 Kf7 29.Nc2 Qb2 30.Ne3 Qb4+= 31.Ng4 Qf8 (31...Ke8!?+=) ½–½. Cottarelli,Franco – Andersson,Lars H, corr ICCF TT–4–90–5, 1992.

10.Nf3 Ngf6 11.Bd4 Qb4 12.Ne5 Qb3 13.Bb3 Ne5 14.Be5 Be7 15.0–0 0–0 16.Nc3 b5 17.Rc1 Bb7 18.h3 Nd7 19.Bg3 Nc5 20.Bc2 b4 21.Ne4 Ne4 22.Be4 Rc8 23.d4 f5 24.Bc2 c5 25.Bb3 c4 26.Rc4 Rc4 27.Bc4 Bd5 28.Bd3 b3 29.f3 Bb4 30.e4 fe4 31.fe4 Bc6 32.Be5 Kf7 33.Kf2 Ba3 34.Bb1 Bc1 35.g3 Bb5 36.Bf4 Bb2 37.Be5 Bc3 38.h4 g6 39.Bh8 Ke7 40.Be5 Kd7 41.g4 Bc4 42.h5 Ke7 43.hg6 hg6 44.g5 Kf7 45.Ke3 Bb4 46.d5 ed5 47.Kd4 Bd2 48.ed5 Be2 49.Bf6 Bb4 50.Ke3 Bg4 51.Bb2 Bd1 52.Kd3 Be7 53.Bc1 Bd6 54.Ke4 Bg4 55.Kd4 Bf8 56.Kc4 Bd1 57.Kb5 Bg7 58.d6 Be5 59.Kc6 Bf3 60.Kc5 Bg4 61.Kc6 b2 62.Bg6 Kg6 63.Bb2 Bf3 ½–½. Arno de Visser – Ruiter, 1984.

9.Ba1 Nf6

10.b5 cb5 11.Bb5 Bd7 12.Bf6 Qb5=+ 13.Qb5 Bb5 14.Bb2 Nd7 15.Ne2 Nc5 16.Nbc3 Nd3–+ 17.Kf1 Ba6 18.Ba1 b5 19.Nd4 b4 20.Ncb5 Kd7 21.f4 f6 22.Ke2 e5 23.Kd3 ed4 24.Kc4 Kc6 (25.Bd4 Bb5 26.Kb3 Bd3–+) 0–1. Wolfertz – Feilmayr,Erwin, corr SOK–87–07, 1987.

10.b5 Nbd7 11.Nf3 Nc5 12.Qb2 cb5 13.Bb5 Bd7 14.Bd7 Nfd7 (14...Ncd7 15.Qb6 Nb6 16.Bf6 gf6 17.Nc3+=) 15.Qb6+= Nb6 16.Ke2 f6 (16...h5 17.d3+=) 17.Nc3+= Bd6 18.Rb1 Bc7 (18...Ncd7 19.Ne4 Bc7 20.Bd4+=) 19.d4 Ncd7 20.Nb5 Bb8 21.Bc3 Kf7 22.e4 Rc8 23.h4 Kg6 24.Bb4 Rc6 25.Kd3 Kh5 26.Nc3 h6 27.Ba5 f5 28.ef5 ef5 29.Rb5 g6 30.d5 Rf6 31.Kc2 g5 32.hg5 hg5 33.Nd4 Ba7 34.Ne6 Kg6 35.f3 unclear. Trokenheim,Marek – Zmolil,Josef, TT–12, 2004.

10.b5 Ne4 11.Nf3 =.

10.b5 Be7

11.Bd4 c5 12.Bc3 =.

11.Nf3 0–0 12.0–0 cb5 13.Bb5 Bd7 14.Nc3 Nc6 15.Qb1 Rd8 16.d4 Qc7 17.Rc1 Ba3 18.Bb2+= Bb2 19.Qb2 g6 20.Nd2 Ng4 21.g3 e5+= 22.d5 The passed pawn on d5 quickly leads to threats 22...Ne7 23.h3 Ne3 24.fe3 Bb5 25.Nb5 Qb6 26.Nc4 Qc5 27.d6 Nd5 28.Kh2 f5 29.Ne5 Qe3 30.Nc7 f4 31.Nd5 Qg3 32.Kh1 Qh3 33.Qh2 Qh2 34.Kh2 Rd6 35.Rc8 Kg7 36.Rc7 Kg8 37.Nf4 b6 38.Re7 Rd2 39.Kh3 Kf8 40.Rf7 Ke8 41.Rh7 g5 42.Nfg6 Kd8 43.Nc6 Kc8 44.Ra7 Re2 45.Nge7 Re7 46.Re7 (46...g4 47.Kh4+–) 1–0. Luzuriaga,Norberto H – Gouaichault,Sebastian, corr or01–014 E–mail, 2001.

11.Nf3 0–0 12.Nc3 cb5 Black gets strong initiative 13.Nb5 Nc6 14.Qc2 Bd7 15.0–0 Rc8 16.Qb1 Nb4 17.Bd4? Qa5–+ 18.Ng5 Rc4–/+ 19.Bf6 Bf6 20.Qh7 Kf8 21.Nd6 Rc6 22.Qh5 Ke7 23.Qf7 Kd6 24.Ne4 Kc7 25.Nf6 gf6 26.Qf6 Qf5 27.Qd4 Qc5 28.Qe4 Nd5 29.d4 Nc3 30.Qc2 Qb5 31.Qh7 Ne2 32.Kh1 Ng3! 33.hg3 Qf1 (34.Kh2 Rc1 35.Qd7 Kd7–+) 0–1. De Visser,Arno – Duin, 1992.

11.Nf3 0–0 12.d3 cb5 13.Qb5 Qb5 14.Bb5 Bd7 =.

11.Nf3 0–0 12.Bd4 c5 13.Bb2 Nbd7 14.0–0 Qc7 15.d3 Nb6 16.Nbd2 Rd8 17.Ra1 Bd6 18.h3 h6 19.Bc3 Nbd5 20.Bb2 Be7 21.Ra8 Nb6 22.Ra1 Nfd5 23.Ne4 f6 24.Nc3 Nc4= 25.dc4 Nb6 26.Nd1 Bd6 27.Bc3 Qe7 28.Ba5 Bc7 29.Nc3 Kf7 30.Bb6 Bb6= 31.Rd1 Rd1 32.Qd1 Bc7 33.Nh4 Kg8 34.Qh5 f5 35.f4 Bd7 36.Qd1 Be8 37.Nf3 Bh5 38.Kf2 g5=+ 39.g3 Qg7 40.Qd3 gf4 41.ef4= Kh7 42.Ne2 b6 43.g4 Bg6 44.g5 Bh5 45.gh6 Kh6= 46.Qe3 Qf6 47.Qd2 Bf3 48.Kf3+= Qf7 49.Qe3 Bd6 50.Ng1 Qh5 51.Kg2+= Qg6 52.Kf1 Qf6 53.Nf3 Qa1 54.Ke2 Qa2 (54...Qb2 55.Nd2 Kg7 56.h4=) ½–½. Hecimovic,Ivan (2205) – Jurkovic,Ante (2330), Open, Velika Gorica CRO, 2002.

11.Nf3 Nbd7 12.bc6 Qc6 13.d4 +=.

5.Bd4 Qc7

6.ba5 Qa5 7.Nf3 Nd7 8.Bc3 Qc7 9.d4 e6 10.Be2 (10.Bd3 Ngf6=) 10...b5=+ 11.0–0 Nb6 (11...Ngf6 12.Bd2=+) 12.Qe1 Ra4 13.Bb2 (13.Ba5 Qa7 14.Bb6 Qb6=) 13...Nf6 14.Nc3 Ra8 15.Bd3 Bd6 16.e4 de4 (16...Na4 17.Na4 de4 18.Nb6 Qb6 19.Be4 Ne4 20.Qe4=+) 17.Ne4= Ne4 18.Qe4 Bb7 19.Rfe1 (better is 19.Qg4 0–0 20.Qe4=) 19...c5 (better is 19...Na4!? 20.Bc1 Nc3=) 20.Bb5+/– Kf8 21.Qg4 h5 (21...Na4 22.dc5 Nb2 23.cd6 Qd6 24.Ra2+–) 22.Qh3 c4 (22...Bf3 23.Qf3 (< 23.gf3 Na4 24.Ba4 Ra4+=) 23...Bh2 24.Kh1+–) 23.a4 Nd5 (23...Bf3 24.Qf3 (24.gf3?! Nd5+=) 24...Kg8 25.h3+–) 24.Ba3 Ba3 25.Ra3 Qe7 26.Raa1 Nf4 27.Qg3 g5? (27...Qf6 28.Bc4 h4 29.Qg4+–) 28.Ng5 Ng2 29.Re2 Qf6 30.Qe5 Qe5 31.Re5 Rg8 32.Bc4 The passed pawn on c2 quickly leads to threats 32...Rc8 33.Rb1 Ba8 34.Rc5 Re8 35.Rb3 Ne1 36.Bb5 Rd8 37.Rg3 h4 38.Nh7 Ke7 39.Rc7 Kd6 40.Rd7 Rd7 41.Rg8 Ra7 42.Ng5 Nc2 43.Nf7 Rf7 44.Ra8 Nd4 45.Bf1 Rg7 46.Kh1 Nf3 47.Bg2 Ne1 48.Bf1 Nf3= ½–½. Dopper,Johan – Andersson,Lars H, corr ICCF TT–3–90–5, 1991.

6.ba5 c5 =.

6.b5 c5 7.Bb2 e5 8.c4 d4 9.g3 Be6 10.Qc2 Nd7 11.Bg2 Nb6 12.ed4 ed4 (12...Nc4? 13.d5 Bd5 14.Bd5 Nb2 15.Qb2+–) 13.d3 Nf6 14.Nf3 Bd6 15.0–0 0–0 16.Nbd2 h6 17.Rfe1 Bf5 18.Re2 Rfe8 19.Rae1 Kf8 20.Nh4 Bh7 21.Ne4 Ne4 22.Be4 Be4 23.Re4 Qd7 24.Qe2 Re4 25.Qe4 (worse is 25.de4 Qe6–/+) 25...g6 26.Bc1 Kg7 27.Nf3 Qc7 28.Qh4 Rh8 29.Nd4 cd4 30.Qd4 f6 31.Re6 Be5 32.Qb6 Qd7 33.Be3 Rd8 34.d4 Bd4?? 35.Bd4 Qd4 36.Qb7 Kg8 37.Re7 f5 38.Qc7 Qf6 1–0. Goelz,Sebastian – Hoehler,Waldemar (1925), St. Leon–Rot GER, Open, 2011.

6.b5 e5 7.Bb2 Bd6 8.c4 Nf6 9.Qc2 (9.d4!? dc4 10.Bc4=) 9...cb5–/+ 10.c5 Qc5 (10...b6!?–/+) 11.Qc5=+ Bc5 12.Be5 Nbd7 (12...b4!?=+) 13.Bb5= Ke7 (13...0–0 14.Nf3=) 14.Bg3 (14.Bf4 Bd6 15.Bd6 Kd6=) 14...Ne4 15.Bc7 Ndf6 16.d4 Bd6 17.Bd6 Nd6 18.Bd3 Bd7 19.Nd2 Rhc8 20.Ne2 b5 21.f3 Nc4 (better is 21...b4=+) 22.Nc4? (better is 22.e4!?=+) 22...dc4–/+ (22...bc4?! 23.Bc2=+) 23.Be4 (23.Bb1 c3–/+) 23...Ne4–+ 24.fe4 b4 25.Kd2? (better is 25.Nf4 Bc6 26.d5–/+) 25...c3 26.Kc2 Ba4 27.Kb1 b3 28.Nf4 Rab8 Black plans b2 29.Nd5 Ke8 30.Nc3 Rc3 31.Kb2 Rc2 32.Kb1 b2 33.Ra2 Rg2 (34.Rb2 Rbb2 35.Ka1 Ra2 36.Kb1 Ra3 37.Rc1 Re3 38.Rc8 Ke7 39.Rc7 Kd8 40.Rc1 Bb5 41.Rc2 Bd3 42.Kb2 Bc2 43.Kc1 Bb3 44.h3 Re1#) 0–1. Deb,Akasa – Del Rosario,Frisco, BCC Santa op, 2000.

6.Nf3 ab4 7.ab4 Ra1 8.Ba1 Nd7 9.c4 e6 10.Be2 Ngf6 11.c5 Be7 12.0–0 0–0 13.d4 Ne4 14.Nbd2 Ndf6 15.h3 h6 16.Qc2 Bd7 17.Bb2 b5 18.Ra1 Ng3 19.fg3 Qg3 20.Nf1 Qg6 21.Qg6 fg6 22.Ne5 Be8 23.Bd3 Ne4 24.Be4 de4 25.Ra6 Bh4 26.g3 Bg5 27.Bc1 Bf6 28.Nc6 Kh8 29.Ne5 Be5 30.de5 Bf7 31.Ra7 g5 32.Rb7 Bh5 33.g4 Be8 34.Rb6 Bd7 35.Rd6 Bc8 36.Nd2 1–0. Holz auf der Heide – Odrich, Leipzig, 1996.

6.Nf3 ab4 7.ab4 Ra1 8.Ba1 Nf6 +=.

6.Nf3 ab4 7.ab4 Ra1 8.Ba1 Bg4 9.Be2 Nd7 10.0–0 Ngf6 11.Bd4 e6 12.Bf6 Nf6 13.c3 Bd6 14.g3 0–0 15.Nd4 Be2 16.Ne2 e5 17.d4 e4 18.Nd2 b5 19.Qa1 Qd7 20.Kg2 Qb7 21.Qb2 Ra8 22.Ra1 Ra6 23.Nb3 Qa7 24.Ra6 Qa6 25.Qa1 ½–½. Hal1958 – Pawnstorm, playchess.de, 2005.

6.Nf3 Nd7 7.ba5 Ra5 =.

6.Nf3 Nd7 7.b5 e5 '=/+' 8.Bb2 Ngf6 9.c4 e4 10.bc6 bc6 (10...ef3 11.cd7 Bd7 12.Bf6 gf6 13.cd5 fg2 14.Bg2+=) 11.Nd4 Ne5 (11...dc4 12.Qc2+=) 12.cd5 '=' 12...cd5 (better is 12...Rb8!? 13.Qc1 Nd5=) 13.Nb5 '+/–' 13...Qb8 (13...Qe7!?+/–) 14.Qc2 Bd6 '??' (better is 14...Kd8+/–) 15.Qc8 '+–!!' 15...Ke7 16.Qb8 Rab8 17.N1c3 Rhc8 18.Be2 Nc4 19.Bc4 Rc4 20.a4 d4 21.Nd6 Kd6 22.Nb5 Kd5 23.Bd4 1–0. Buczinski,Henryk (2200) – Byrka,M (2200), DMSl.–Klasa A Poland, 1994.

6.Nf3 Nd7 7.c4 e5 8.Bb2 e4 +=.

6.Nf3 Nd7 7.Be2 e5–/+ 8.Bc3 ab4 9.ab4 Ra1 10.Ba1 Bb4 11.c3 (11.Ne5 Ne5 12.f4 f6 13.fe5 fe5–/+) 11...Bd6 12.h3 (12.c4 dc4 13.Bc4 Ngf6–+) 12...Ne7 (12...Ngf6 13.d3–+) 13.d3 0–0 14.Nbd2 (14.0–0 Rd8–+) 14...f5 (14...b5 15.c4–+) 15.e4 (15.c4 b5–/+) 15...Nf6 (15...fe4 16.de4 Nc5 17.0–0–+) 16.Qb3 (16.ed5 e4 17.Nd4 Ned5–+) 16...Kh8 (16...Ng6 17.ef5 Bf5 18.g4–+) 17.0–0 Ng6 (17...fe4 18.de4 Ng6 19.ed5–+) 18.Re1 (18.ed5 Nf4 19.Re1 e4–/+) 18...fe4 19.de4 Bc5 (19...Nf4 20.ed5 cd5 21.c4–+) 20.Bd3–/+ Nf4 21.Bf1? (better 21.Bc2!?–/+) 21...Ne4–+ 22.Ne4 (22.Re4 de4 23.Ne4 Qa5–+) 22...de4 23.Re4 Nh3! 24.Kh2 (24.gh3 Rf3 Discovered attack (24...Rf3 Deflection; 24...Rf3 Overloading)) 24...Nf2 25.Bd3 Nd3 26.Qc4 Bf5 (better 26...Qd6 27.Ng5 Qh6 28.Nh3 Bh3 29.Rh4–+) 27.Qd3 Be4 28.Qe4 Rf4 29.Qe5 (29.Qe1 e4 30.Kh1 ef3 31.gf3 Rf3–+) 29…Rh4! (29...Rh4 30.Kg3 Bd6 31.Qd6 Qd6 32.Kh4 Qa3–+) 0–1. Macedo,A Soares De (1845) – Santiago,Yago De Moura (2440), Natal Brazil, Potiguar Open, 2016.

6.Nf3 f6 7.ba5 Qa5 8.c4 e5 9.Bc3 Qc7 10.d4 e4 11.Nfd2 Nh6 12.Qb3 Be6 13.cd5 cd5 (better is 13...Bd5!? 14.Bc4 Bc4 15.Qc4 f5=) 14.Ne4+/– Bf7 15.Bb5 Nc6 16.Ned2 Bd6 17.h3 0–0 18.0–0 g5 19.Bc6 bc6 20.Bb4 f5 21.Bd6 Qd6 22.g3 Qg6 23.Qc2 Qh5 24.Kg2 f4 25.Qd1 (25.Qc6?! fe3 26.fe3 Qe2 27.Kh1 Qh5=) 25...Qg6 26.ef4 gf4 27.Nf3 fg3 28.fg3 Nf5 29.Qe1 Qg7 30.Qf2 Bh5 31.g4 Bg4 32.hg4 Qg4 33.Kh2 Rf6 34.Rg1 Rh6 35.Nh4 Rh4 36.Qh4 Qg1! (36...Qg1 37.Kg1 Nh4–+; 36...Nh4?? 37.Rg4 Ng6 38.Nd2+–) 0–1. Mende,Emil – Trottnow,Hans Joachim, FRG corr Germany, 1985.

6.f4 Nd7 7.Nf3 ab4 8.ab4 Ra1 9.Ba1 Ngf6 10.Qc1 (10.Bd4 e6 11.c3 b6=) 10...e6 11.Qb2 Be7 12.Be2 0–0 (12...Qd6 13.b5=) 13.0–0 b6 14.b5 c5 15.c4 dc4 (15...Bb7 16.d3=) 16.Bc4 (16.Na3 Bb7=) 16...Bb7 17.d3 Ne8 18.Nc3 (18.Nbd2 Bf6 19.Qc2 Nd6=) 18...Bf6 19.Ba2 e5 20.Bd5 (20.Ng5 ef4 21.ef4 Bd4 22.Kh1 Nd6–/+) 20...ef4=+ 21.Bb7 Qb7 22.ef4 Nc7 23.Qb3 Qa8 24.Qc4 Ne6 25.Kh1 (25.Na4 Ba1 26.Ra1 Re8=) 25…Nd4 (25...Re8 26.Na4 Ba1 27.Ra1=+) ½–½. Martello,Juan – Popstein,Sheila, corr CTON Thema, 1997.

6.f4 Nd7 7.Nf3 e6 8.b5 (8.ba5 Ra5 9.Be2 Ngf6=) 8...Ngf6 9.Be2 Bd6 10.c4 (10.bc6 bc6 11.Nc3 0–0=) 10...dc4 11.Bc4 c5 (11...0–0 12.0–0=) 12.Bb2 0–0 13.0–0 b6 14.d3 (14.Nc3 Bb7=) 14...Bb7 (14...e5 15.f5=) 15.Nbd2 (15.Nc3 e5=) 15...Rae8 (15...e5 16.fe5 Ne5 17.Qe2=) 16.Ng5 (16.Qe2 e5=) 16...h6 (16...e5!?+=) 17.Nge4= Be7 (17...e5 18.Qf3+=) 18.Qe1 (18.Qf3 Bd5+=) 18...Rd8 (18...Bd5 19.Qg3+=) 19.Rd1 (19.Rc1 Rfe8+=) 19...Bd5 20.Qg3 Ne8 (20...Rfe8 21.Nc3 Nh5 22.Qf2+= (worse is 22.Nd5 ed5 23.Qf3 dc4–/+)) 21.f5 Qg3= 22.Ng3 Nd6 23.Bd5 ed5+= 24.a4 Bg5 25.Rf3 Rfe8 26.Kf2 Ne5 27.Be5= Re5 28.d4 cd4 29.ed4 Re7 30.Re1 Rc7 31.Nb1 Rc4–+ 32.Rd3 Ra4 33.Nc3 Ra3 34.Red1 Nc4 35.Nb1 Ra2 36.Kf3 Rb2 37.Nc3 g6 38.Nge2 gf5 39.g3 Nd2 40.Kf2 Ne4 41.Kf3 Kf8 42.h4 Bf6 43.Kf4 Nf2 44.Kf5 Nd1 45.Rd1 Bg7 46.Nf4 Rb4 47.Nfe2 Re8 48.Rd3 a4 49.Nf4 Rd4 50.Rd4 Bd4 51.Na4 Re5 52.Kg4 Bg1 53.Nc3 d4 (53...d4 54.Na2 Rb5–+) 0–1. Lihosith,Peter (2095) – Rohacek,Miroslav (2230), Piestany (Slovakia), 2005.

6.f4 Bf5 7.Nf3 Nd7 8.b5 c5 9.Bb2 Ngf6 10.Be2 h6 11.0–0 e6 12.h3 Bd6 13.Nh4 Bh7 14.c4 d4 15.g3 e5 16.Ng2 0–0 17.f5 e4 18.ed4 cd4 19.Bd4 Bg3 20.Ra2 Qd6 21.Be3 Qe5 22.d4 ed3 23.Bd3 Nc5 24.Bc5 Qc5 25.Kh1 Rad8 26.Qf3 Bc7 27.Rd2 Rfe8 28.a4 b6 29.Bc2 Rd2 30.Nd2 Qd6 31.Qf4 Re2 32.Qd6 Bd6 33.Rd1 Bb4 34.c5 Rd2 (34...Bd2?! 35.Bd3 Re5 36.Rd2 Rc5 37.Ne3–/+) 35.Rd2 Bd2 36.cb6 Nd7 37.b7 g6 38.fg6 Bg6 39.Bg6 fg6 40.Kg1 Bb4 41.Nf4 Kf7 42.Nd3 Ke6 43.Nf4 Kf5 44.Nd5 Ke5 45.Nc7 Bd6 (46.Na6 Kd5–+) 0–1. Pommerel,Wim – Steuer, email 4AMM–F, 1998.

6.f4 f6 7.b5 e5 (7...Nh6!?=) 8.fe5+= fe5 9.Qh5 Qf7 10.Qe5 Ne7 11.Nf3 Nd7 12.Qc7 Qg6 13.Nc3 Nf5 14.bc6 bc6 15.Ne5 Ne5 16.Be5 Be7 17.Bd3 Bd8 18.Bf5 Bf5 19.Qb7 0–0 20.0–0 Bg5?? (better is 20...Bf6 21.Bf6 Qf6+=) 21.Rf5!+– Qf5 (21...Rf5 22.Qa8) 22.Qg7# 1–0. b4_player (2190) – RonaldHaring (2140), GameColony.com, 2003.

6.f4 Nf6 7.Be2 Nbd7 8.Nf3 e6 9.b5 c5 10.Bb2 Bd6 11.a4 (11.0–0 0–0=) 11...e5 12.fe5 Ne5 13.Ne5 Be5 14.Be5 Qe5 15.Ra3 0–0 16.0–0 b6 (16...Re8 17.Bf3=) 17.d4= ½–½. Maly,Wolfgang – Sturm,Frank, corr H–Klasse BdF, 1998.

6.c4 e5=+

7.Bb2 ab4 8.ab4 Ra1 9.Ba1 Bb4 10.cd5 cd5 11.Qa4 Nc6 12.Bb5 Nge7?? 13.Nf3?? Bd6–/+ 14.0–0 0–0 15.g3 Bg4?? 16.Qg4+– Nb4? 17.Be5! Be5 18.Ne5 Qe5 19.Qb4 Rc8 20.d4 Qe6 21.Nd2 Nf5 22.Nf3 h5 23.Ne5 Qb6 24.Nd7 Qe6 25.Rb1 h4 26.Qe1 hg3 27.Ne5 gh2 28.Kh1 Rd8 29.Ng4?? Qe4=+ 30.Kh2 Qg4 31.Qf1?? Rd6–+ 32.Qg2 Qh4 33.Qh3 Qf2 (34.Kh1 Rh6 35.Qh6 Ng3#) 0–1. Dopper,Johan – Van der Mark,W, 1993.

7.Bb2 ab4 8.ab4 Ra1 9.Ba1 dc4 10.Bc4 b5 11.Bb3 Bb4 12.Nf3 =+.

7.Bb2 ab4 8.ab4 Ra1 9.Ba1 Nf6.

7.Bb2 ab4 8.cd5 cd5 9.Nf3 Nc6 –/+.

7.Bc3 ab4 8.ab4 Ra1 9.Ba1 Bb4 10.cd5 cd5 11.Bb5 Bd7 12.Qa4 Qc1 13.Ke2 Qb1 14.Be5 Bf8 15.Bd7 Nd7 16.Qa8 Ke7 17.Qa3 Ke6 18.Qb2 Qb2 19.Bb2 Ne5 20.f4 Nc4 21.Bc3 Nf6 22.Nf3 Bc5 23.d4 Ne4 24.Ba1 Ra8 25.Rb1 Ra2 0–1. Wartig – Woelfelschneider, corr SOK–96–119 1997.

7.Bc5 ab4 8.Bf8 Kf8 –/+.

6.Nf3 Bg4

7.ba5 Ra5 8.Bc3 Ra8 =.

7.c4 ab4 8.ab4 Ra1 9.Ba1 f6 (9...Nf6 10.Nc3=) 10.cd5 cd5 11.Nc3 e6 12.Qa4 Kf7 13.Nd4 (13.Nh4+=) 13...Nc6? The isolani on b4 becomes a target (better 13...e5!? 14.Nb3 Bd7+=) 14.Nc6+– bc6 (14...Qc6?? 15.b5 Qd7 16.Qg4+–) 15.b5 Nh6 16.bc6 Be7 17.h3 Bh5 18.Bb5 g5 (18...Rb8+–) 19.Ne2 Bg6 20.Bc3 (20.h4!? gh4 21.g4 hg3 22.Rh6 g2+–) 20...Nf5 21.Nd4 Nd6 22.Ba5 Qa7 23.c7 Qc5? (better 23...e5!? 24.Nc6 Qc5 25.Nd8 Bd8 26.cd8R Rd8 27.Bd8 Nb5+–) 24.Bd7+– e5 25.Nb5?? (25.Nc6 Qc1 26.Qd1 Qd1 27.Kd1 Bd3+–) 25...Nc8?? (better 25...Nb5 26.Qb5 Qc1 27.Ke2 Qh1=) 26.0–0+– Bc2 (26...Bd3 27.Ra1+–) 27.Qg4 (better 27.Qa1 Qc4 28.d4+–) 27...f5 (27...Bd3 28.Ra1 (28.Bc8 Bf1 29.Nc3 Kg7+–) 28...Bb5 29.Bc8+–) 28.Bf5 (28.Qh5 Kg7 29.Bc3 Bf6+–) 28...Qb5 (28...h5 29.Qf3 Bf5 30.Qf5 Bf6 31.Qd7 Qe7 32.Qd5 Qe6+–) 29.Bc8 (29.Bc2?! Qa5 30.Qd7 Kg7+=) 29...Qa5 (29...Kg7 30.Ra1 h5+–) 30.Qe6 Kf8 31.Qe5 Kf7 32.Be6 Kg6 33.f4 (better 33.Bd5 Kh6 34.Qe7+–) 33...Bf6 34.f5 Kg7 35.Qd6 (better 35.Qg3!? Qc5 36.Rc1+–) 35...Qd2+– 36.c8Q (36.Qd7 Kh6 37.Qf7 Qe3 38.Kh1=) 36...Rc8= 37.Bc8 Qe3 38.Kh1 Be4 39.Kh2?? (39.Rg1 d4 40.Kh2 Bf5 41.Qc7 Kh6=) 39...Qc3 (better 39...Qe2 40.Qc7 Kh6–+) 40.Qd7= Kh6 41.Qe6 Kg7 42.Qd7 ½–½. Lindner,Jan_Joost (2150) – Monedero Gonzalez,Josep (2100), Camp. Europeo Senior a Squadre, 2012.

7.c4 e5 8.Be5 Qe5 9.Ne5 Bd1 10.Kd1 Bd6 11.Nf3 ab4 12.cd5 ba3=+ 13.dc6 Nc6 14.Bc4 Nf6 15.Nc3 0–0 16.Ke2 Rfc8 17.Rhb1 Nd8 18.d3 Ra5 19.h3 Nd7 20.Nb5 Be7 21.Ra2 Nb6 22.Nd2+= Na4 23.Rb3 Rb5= 24.Bb5 Nc3 25.Rc3 Rc3 26.Bc4 Rc1 27.d4 Nc6 28.Bb5 Na7 29.Bd3 b5 30.d5 b4=+ 31.Bc4 Nc8 32.Bb3 Nd6–/+ 33.Ba4 Rc5 34.e4 Ra5 35.Bb3=+ Rc5 36.Kd3?? Rc3–+ 37.Ke2 Ne4 38.Ba4? Nd2 39.Kd2 b3 40.Ra1 Rc2 (41.Kd3 b2–+) 0–1. Holz auf der Heide,Gerhard – Trautmann,Klaus, corr DDR–ch M550, 1973.

7.Be2 ab4 8.ab4 Ra1 9.Ba1 Nd7 10.0–0 Ngf6 11.h3 Bh5 12.c4 e6 13.c5 b6 14.d4 bc5 15.bc5 Be7 16.Nfd2 Be2 17.Qe2 e5 18.Nc3 0–0 19.Rb1 Re8 20.Qa6 ed4 21.ed4 Rb8 22.Rb8 Nb8 23.Qb6 Bd8 24.Qc7 Bc7 ½–½. Hal1958 – Pawnstorm, playchess.de, 2005.

7.Be2 Bf3+= 8.Bf3 e5 9.Bc5 ab4 10.Bf8 Kf8 11.0–0 g6 12.c3 bc3 13.Nc3 Ne7 14.Qb3 Kg7 15.Rab1 b5 16.Rfc1 Qd6 17.a4 ba4 18.Na4 Nd7 19.d4 Rhb8 20.Qc2 ed4 21.Rb8 Qb8 (21...Rb8 22.ed4 Nf5 23.Bg4 Nd4 24.Qd1–+) 22.ed4–/+ Qb4 23.Nc5 Nc5 24.dc5 Ra5 25.Qe2 Ng8 26.Qe5 Nf6 27.g4 h6 (27...Rc5 28.Rc5 Qc5 29.g5+/–) 28.h4 Qa3 (28...Rc5 29.Rc5 Qc5 30.g5 hg5 31.hg5 Qc1 32.Kg2+/–) 29.Qf4?! (29.Qe3–+) 29...Ra4 (29...Rc5?! 30.Rc5 Qc5 31.g5–+) 30.Qe3 Qe3 (30...Qe3 31.fe3 Ng4–+) 0–1. Tomasi,Stephane (1860) – Bon,Michael (2120), Provence–ch Majeur op, 1998.

7.h3 Bf3 8.Qf3 e5 9.Qg3! Nd7 10.ba5 c5 11.Bc3 Ngf6 12.Bb5 Bd6 13.Qg7 0–0–0 14.Qf7 Rhf8 15.Qe6 d4 16.Bb2 Ne4 17.f3 Ng5 18.Qg4 Rg8 19.a6 e4 20.fe4 Bg3 21.Kd1 ba6 22.Ba6 Kb8 23.ed4 cd4 24.Bd4 Ne5 25.Qg3 Rd4 26.Qb3 Ka7 27.Qg8 Ne4 28.Re1 Nf2 29.Ke2! Ka6 30.Qa8 Kb6 31.Kf2 Qc5 32.Qb8! 1–0. mare – milky2, Internet, 2001.

7.h3 Bh5 8.g4 Bg6 9.Ne5 Nf6 10.Ng6 hg6 (11.f4 Nbd7=) =. Orlok – Mayor, ACL–T055 playchess.de, 2003.

6.f4! ab4

7.ab4 Ra1

8.Ba1 Nf6 9.Be5 Qb6 10.Bb8 +–.

8.Ba1 Qb6?

9.b5! cb5 10.Nc3 Nf6 11.Nb5 Bd7 12.Bd4 +/–.

9.b5 Bf5 10.Nf3 =.

9.b5! Nf6 10.c4 dc4 11.Bc4 e6 (11...cb5 12.Qb3 Be6 13.Bb5 Nfd7 14.Qa4+/–) 12.Nc3 Qc5? 13.Qb3 Qb4 14.Nf3 Nbd7 15.Qa2!? Nb6 16.Bb3 cb5 (16...Be7 17.f5 Qd6 18.0–0 0–0 19.fe6 Be6 20.Be6 fe6 21.Nd4 Nbd5 22.bc6+=) 17.f5!+/– Nfd5 (17...Qg4!? 18.fe6 fe6 19.0–0 b4=) 18.0–0 Nc3 19.Bc3 Qa3? (19...Qe4 20.Qa5 Nd5 21.fe6 fe6 22.Qb5+/–) 20.fe6 fe6 21.Be6 Qa2 22.Ba2 Nc4 23.d3 Nd6 24.Ng5 Bf5 25.e4 Bg6 26.Bd5+– Kd7 27.Ne6 Be7 28.Nc5 Kc7 29.Ba5! Kb8 30.Nd7! Kc8 31.Be6 b6 32.Bb6 Kb7 33.Ra1 Nc8? 34.Bd5# 1–0. Schwetlick – Henze, Binz 1994 (Schwetlick).

9.b5 Nf6 10.Be2 Bf5 =.

9.b5 Nf6 10.Nf3 Bg4 11.h3 Bf5 12.g4 Be4 13.Nc3 e6 14.Ne4 (14.g5 Qa5 15.Bb2 Bf3 16.Qf3 Qb4+=) 14...Ne4= 15.Bd3 Nc5 (15...Nd7 16.bc6 bc6 17.Be4 de4 18.Ng5=) 16.Be2 Ne4 17.Rg1 (17.bc6 Nc6 18.Bd3 Nb4=) 17...cb5 (17...Nd7 18.bc6 bc6 19.c4=) 18.Qb1 (18.Bd4 Qc6=) 18...b4= 19.c4 (19.Bd4 Qc7=) 19...Qa5 (19...Qd8 20.cd5 Qd5 21.Bd3=) 20.cd5 Qd5 21.Qc2 Qc6 22.Qa2 Qc1=+ 23.Bd1 Qa3 24.Qc2 Nc6 25.Bg7 Bg7 26.Qe4+= b3 27.f5 b2 28.Bc2 Qd6 29.fe6 fe6 30.Ke2 Nb4 31.Ba4 Kd8 32.Qb7 Qa6 33.Qa6 Na6 34.g5 Nb4+= 35.d4 Nd5 36.Bc2 h6 37.h4 Rf8+= 38.Ne5 Be5= 39.de5 hg5 40.hg5 Ke7 41.Rh1 Rg8 42.g6 b1Q 43.Bb1 Nc3 44.Kf3 Nb1 45.Rb1 Rg6 46.Rb7 Ke8 47.Ra7 ½–½. Bonetti,Shane – Tschoepe,Frank, TT–09 ETC, 2003.

8.Ba1 Nd7

9.Nf3 Ngf6

10.b5 c5 =.

10.Qc1 e6 11.Qb2 b5 12.Be2 Be7 (12...Qd6 13.Ne5=) 13.Nc3 (13.0–0 0–0=) 13...0–0 14.Nd1 (14.0–0 Qd6=+) 14...Qa7 15.Qb1 Bb7 (15...Qa4 16.c3=+) 16.Bd4= Qa3 17.c3 Ne4 18.0–0 f5 (18...Ra8 19.d3 Qa2 20.Nb2=) 19.Nf2 (19.d3 Nd6+=) 19...Ra8= 20.Ne4 fe4 (20...de4 21.Ne5 Ne5 22.fe5=) 21.Ne5+= Ne5 22.fe5 Qa2 23.Bg4 Bc8 24.Qe1 Bd7 25.Bc5 Bc5 26.bc5 Rf8 (26...h6 27.Qf2 Kh7 28.Bh5+=) 27.Rf8 Kf8 28.Qh4 Ke8 29.Qh7 Qd2 30.Qh8 Ke7 31.Qh4 Kf7 32.Qf2 Qf2=+ 33.Kf2 g6 34.h4= g5 35.Bh5 Kg7 36.hg5 Kf8 37.Kg3 Be8 38.Kh4?? Bd7?? 39.Bg6 Bc8 40.Kh5+/– Kg7 41.Be8+– Bb7 42.Kg4 Ba8 43.Bd7 Bb7 44.Be6 Ba6? 45.Bd7 b4 46.cb4 Bc4 47.Bc6 Kg6 48.Kf4 Kg7 49.b5 d4 50.ed4 (50...Bb5 51.Bb5+–) 1–0. Hort,Vlastimil – Angantysson,Haukur, BL, 1984.

10.Bd3 e6 11.b5 Bd6 12.0–0 0–0 13.Qe1 (13.Nc3 b6=) 13...c5 (13...cb5 14.Qg3=+) 14.Qg3= h6 (14...c4 15.Be2=) 15.Ne5 (15.Be2 c4=) 15...Nh5 16.Qh4 Nhf6 (16...Ne5 17.Be5 Be5 18.fe5 Qe5 19.Qe7+=) 17.Qg3 (17.Nd7 Nd7 18.c4 dc4 19.Bc4 Nb6=) 17...Nh5 18.Qh4 Nhf6 (18...Ne5 19.Be5 Be5 20.Qh5=+) 19.Nd7 Nd7 20.Rf3 e5 21.Rg3 Kh8 22.Nc3 Qa5 23.Bb2 Nf6 24.fe5 Be5 25.Rg5 Re8 26.Re5? Re5–/+ 27.Nd5 Rh5 28.Qf4 Qd2?? 29.Nf6= (29...Qe1 30.Bf1–+). Nemec,Zdenek – Zmolil,Josef, TT–12 ETC, 2004.

10.Bd3 e6 11.b5 Be7 12.0–0 0–0 13.Nc3 (13.Bb2 Rd8=) 13...Nc5 (13...c5 14.Qe1=) 14.Be2 Bd7 15.Qe1 (15.Nd4 Ra8=+) 15...Ra8 (15...cb5 16.Nb5 Bb5 17.Bb5=) 16.bc6 bc6 17.Qg3 Rb8 18.Rd1 Bc8 19.d3 Ba6 (19...Ncd7 20.Rf1=) 20.Ne5 Ne8 21.Bg4 Nd6 22.Ne2 f6 23.Nf3 g6 (23...Nde4 24.Qe1 f5 25.Bh5=) 24.Bd4 Nf5 (24...f5 25.Bh3 Nce4 26.Qe1= (< 26.de4 Be2 27.ef5 ef5=+)) 25.Bf5+= ef5 26.Ra1 Bc8 27.Nh4 Qd6 28.Ng6 (28.Bc3 Kg7+=) 28...hg6= 29.Qg6 Kf8 30.Ng3 Qe6 31.Nh5 Increasing the pressure on the isolated pawn on f6 31...Qf7 32.Qh6 Ke8 33.Nf6 Kd8 34.Qh8 (34...Qf8 35.Qf8 Bf8 36.Kf2=). pcmvr (2100) – coffeehouse (2430), net–chess.com, 2006.

10.Bd4 e6 11.c3 c5 12.bc5 Bc5 =.

10.Be2 e6 11.b5 (11.Bc3 Ne4=) 11...Bc5 12.d4 (12.bc6 bc6 13.Ne5 Bd6=) 12...Bb4 13.c3 (13.Bc3 Bd6=) 13...Be7 14.0–0 (14.c4 cb5 15.c5 b6–/+) 14...cb5 15.Bb5 Qa5 (15...0–0 16.Bd3=+) 16.Qa4 (16.Ba4 b5 17.Bc2 Qa1–+) 16...Qa4 17.Ba4 Ne4 (17...b6 18.Ne5=+) 18.Nbd2= Nd6 19.Rb1 f6 (19...Kd8 20.Ne5=) 20.Bc2 g5 (20...f5 21.Bd3=) 21.Bb2 g4=+ 22.Ne1 h5 23.Bd3 b6 24.e4 de4 25.Ne4 Bb7 26.Nd2 Kf7 27.c4 h4 28.Ra1 h3 29.g3 Ra8 30.Ra8 Ba8 31.Ba3 f5 32.Kf2 Nf6 33.Bc2 Nde4 34.Ne4 Ba3=+ 35.Nf6 Kf6 36.Nd3 (36...Be4 37.Ke3=+). Blankenberg,Bruno (2440) – Hasek,Frantisek (1765), TT–15 ETC, 2005.

5.Nf3 ab4

6.Bd4 c5 7.Bc5!+/– Qf6 (7...Qc5 8.ab4 Decoy) 8.Bd4 Qd6 9.Bb5 Bd7 10.Bd7 Nd7 11.ab4 Ra1 12.Ba1 e6 13.0–0 Ngf6 14.d4 (better is 14.Bf6!? Nf6 15.c3+/–) 14...Qb4= 15.Nbd2 Be7 16.Qe2 Qa4 17.c4 dc4 18.Nc4 0–0 19.Nce5 Rc8 20.Qb2 b5 21.Ng5 1–0. Jostov,Keylah – Guimaraes,Joao, SC–2009–0–00026, 2009.

6.Bd4 Qc7 7.ab4 Ra1 8.Ba1 Nd7 9.c4 e5 10.cd5 cd5 11.Nc3 e4 (< 11...Bb4 12.Nd5 Qd6 13.Nb4 Qb4 14.Ne5 Ne5 15.Be5+–) 12.Nd5 (better is 12.Nd4!? Ngf6 13.Ncb5=) 12...Qc6–/+ 13.Ne5 Qd5?? (13...Ne5 14.Bb5!? Nd3 15.Kf1 Bd7 16.Bc6 Bc6+–) 14.Bc4+/– Qe5 15.Be5 Ne5 16.Qa4 Nd7 (16...Bd7 17.Bb5 Ke7 18.Bd7 Nd7 19.Qa8+–) 17.Qa5 (17.d3 Ngf6+/–) 17...Ne7 18.Qc7 f6 (18...g6!?+/–) 19.Bb5 (19...f5 20.f3+–; 19.Bd5 f5+–) 1–0. Woelfelschneider,Peter – Tschoepe,Frank, TT–09 ETC, 2003.

6.Bd4 Qc7 7.ab4 Ra1 8.Ba1 Nd7 9.c4 e6 10.Qb3 Ngf6 11.d4 dc4 12.Bc4 Nd5 13.0–0 Nb4 14.Nbd2 Be7 15.e4 0–0 16.Bc3 Na6 17.Re1 b5 18.Bd3 e5 19.Bb1 ed4 20.Nd4 Nac5 21.Qc2 1–0. Jostov,Keylah – Guimaraes,Joao, SC–2009–0–00025, 2009.

6.Bd4 Qc7 7.ab4 Ra1 8.Ba1 Nd7 9.c4 Ngf6 10.cd5 Nd5 11.b5 e5 12.Nc3 Bd6 13.Ne4 0–0 14.Bc4 f5 (14...N5b6 15.Be2=) 15.bc6 bc6 (worse 15...Qc6 16.Qb3 N7b6 17.Nd6 Qd6 18.Be5+–) 16.Nd6 Qd6 17.d3 e4 18.de4 fe4 19.Qd4 N7f6 20.Nd2 Bf5 21.0–0 Kh8 22.Rb1 Rd8 23.Nb3 Rb8 24.Rc1 Qa3 25.Qc5 Qc5 (25...Rb3? 26.Bb3 Qc5 27.Rc5+–) 26.Nc5 h6 27.h3 Kh7 28.g4 Bg6 29.Bd4 Ra8 30.Ne6 Bf7 31.Bd5 cd5 32.Ng7! Kg7 33.Rc6 Kh7 34.Rf6 Bg6 35.Rd6 Bf7 36.Kh2 Rg8 37.Kg3 h5 38.Kh4 hg4 39.hg4 Re8 40.Rd7 (40.g5!? Re6 41.Rd7 Kg6 42.Rd5 Re7 43.Rd6 Re6+–) 40...Kg6 41.Kg3 Rg8 42.Rd6 Kh7 43.Kf4 Rf8 44.g5 (44.g5 Bg6 45.Bf6+–) 1–0. Panza (2570) – Goyathlay (2520), ChessWorld.net, 2010.

6.Bd4 Qd8 7.ab4 Ra1 8.Ba1 Bf5 9.Be2 e6 10.b5 h6 11.0–0 Nf6 12.c4 dc4 13.Bf6 gf6 14.Bc4 Rg8 15.Nc3 c5 16.Kh1 Nd7 17.Qb3 Bd6 18.d4 Qc7 19.Nh4 Bh7 20.Be6 fe6 =+. Hoch,Hubertus (2165) – Schuster,Peter (2340), BdF T, 2004.

4.a3 Nd7

5.c4 Ngf6 6.Nf3 e6 7.Nc3 a5 8.c5 Qc7 9.d4 e5 (9...b6 10.Bd3=) 10.de5 Ne5 11.Ne5 Qe5 12.Na4 Qg5 13.Nb6 Rb8 14.h4 Qh6 (better is 14...Qf5!?+/–) 15.Be5+– (15.Nc8?! Rc8 16.Bd3 Ra8+=) 15...Bg4 16.Qa4 Rd8 17.Qa5 (better is 17.Bf4!? Qh5 18.Bc7+–) 17...Be7 18.Qa7 0–0 (18...Nd7 19.Nd7 Rd7 20.Qb8 Bd8 21.Bd3+/–) 19.Qb7+– Rfe8 20.Be2 (better is 20.Bf4 Qg6 21.Rc1+– (21.Qc6 Qc2 22.f3 Qc3 23.Kf2 Qa1–/+)) 20...Be2+= 21.Bf4 (21.Bc7 Qh5 22.Qc6 Bd3+=) 21...Qg6 (21...Qh5!? 22.f3 Bd3–/+) 22.Ke2= Qc2 23.Kf3 Nh5 (better is 23...Qe4 24.Ke2 Qc2 25.Kf3 Qe4 26.Ke2 Qc2=) 24.Rac1?? (24.Bc7 Qe4 25.Ke2 Qc2 26.Kf3 Qe4 27.Ke2 Qc2 28.Kf3=) 24...Qe4–+ 25.Ke2 Nf4 (26.Kf1 Qg2 27.Ke1 Bc5–+) 0–1. Gross,Wilhelm – Merten,Rainer, xviii/04, 1989.

5.d4 Ngf6 6.c4 a5 7.Nd2 ab4 8.c5 Qc7 9.ab4 Ra1 10.Qa1 e6 11.Qa7 Be7 12.Ngf3 0–0 13.Bd3 Bd8 14.0–0 b5 15.Qc7 Bc7 16.Ra1 h6 17.Nb3 Nb8 18.Ra8 Na6 19.Bc3 Ne4 20.Be1 Nf6 21.Ne5 Be5 22.de5 Nd7 23.f4 f6 24.Nd4 Ndb8 25.Bg6 fe5 26.fe5 Bd7 27.Bd2 (27...Rc8 28.e4+/–) 1–0. Taulien,Hans_Juergen (2225) – Schild,Reinhard (2105), remoteschach.de, 2004.

5.d4 Ngf6 6.c4 dc4 7.Bc4 e6 8.Nc3 Be7 9.Nf3 a5 10.Na4 Bb4! 11.Ke2 Qc7 12.ab4 b5 13.Bd3 ba4 14.Ra4? (14.Qa4 Rb8 15.Ba3) 14...Rb8 15.Ba3? (15.Bc3) 15...Nd5 16.Qd2 ab4 17.Bb4 c5! 18.Bc5 Nc5 19.Rc1?? (19.dc5) 19...Qd7 20.Ra5 (20.Rc5 Qa4 21.Bb5) 20...Nd3 21.Qd3 0–0 (continuation unknown, 41 moves) 0–1. Veer – Ramos, Surinam 1980 (Veer).

5.Nf3 a5 6.b5 =.

5.Nf3 Ngf6 6.c4 dc4 7.Bc4 e6 8.Qb3 (8.0–0 Bd6+=) 8...Be7 (8...Bd6 9.0–0=) 9.Nc3 (9.0–0 a5+=) 9...a5= 10.Na4 Qd8 11.b5 cb5 12.Bb5 0–0 13.0–0 Nb6 (13...b6 14.Bc6 Rb8 15.Rfc1=) 14.Nb6+= Qb6 15.Bd4 Bc5 (15...a4 16.Qb2 Qa5 17.Ne5+/–) 16.Bf6+/– gf6 17.d4 Be7 18.Rab1 a4 19.Qd3 Qd6 20.Rb4 Bd7 21.Bd7 Qd7 22.Rb6 Rfc8 23.Rfb1 Attacks the backward pawn on b7 (23.Rd1 Qc7 24.Rbb1 Qc3+=) 23...Rc6 (23...Rc7 24.e4+=) 24.R6b5 Rac8= 25.g3 Rc1 26.Kg2 R8c3 27.Qe4 Increases the pressure on the backward pawn 27...f5 28.Qf4 Rb1 29.Rb1 Ra3 30.Qb8 Bf8 31.Rb7+/– Qc6 32.Qa7 f4 33.Rf7+/– e5? 34.Rh7 Qg6 35.Rh4 e4 36.Ne5 f3 37.Kh3 (37...Qe6 38.Rg4 Qg4 39.Kg4 Be7 40.Qe7 Kh8 41.Qf7 Re3 42.Ng6#) 1–0. Chirpii,Alexandru (2150) – Geanta,Horia (2310), Eforie Nord op, 2002.

4.a3 e6

5.c4 a5 6.c5 Bc5?? (better 6...Qc7+=) 7.Bg7+– ab4 8.ab4 Ra1 9.Ba1 f6 10.bc5 Qc5 11.Qh5 Ke7 12.Bb2 e5 (12...Qc2 13.Ba3 c5+–) 13.Ba3 Qa3 14.Na3 Nd7 15.Nf3 Nc5 16.Ne5! fe5 17.Qe5 Kd7 18.Qh8 Ne7 19.Qh7 (better 19.Be2 b5 20.Qf6 Ne6+–) 19...b5 20.d4 Ne4 21.Nb5! cb5 22.Bb5 Kd6 23.Qh6 Be6 (23...Ng6 24.Qg6 Ke7 25.0–0 Nc3 26.Rc1 Bh3 27.Rc3 Be6 28.Qg7 Bf7 29.Rc8 Ke6 30.Qe5) 24.Qf4 1–0. DEFFM – GuestJXYB, freechess.org, 2020.

5.Nf3 h6 (5...Nd7 6.Be2=) 6.Bd4 Qd8 7.c4 (7.Nc3 Nf6+=) 7...Ne7 (7...Nf6 8.cd5 ed5 9.Nc3=) 8.Bd3 a6 (8...dc4 9.Bc4 a5 10.ba5 Qa5 11.0–0=) 9.Nc3 (9.Ne5 Nd7+=) 9...Rg8 (9...dc4 10.Bc4 Nf5 11.Be5+=) 10.0–0 g5 (better 10...dc4!? 11.Bc4 Nd7+–) 11.Bh7+– Bg7? (better 11...Rg7 12.Bg7 Bg7+–) 12.Bg8 Bd4 13.Bf7! (worse 13.ed4 Ng8 14.d3 Ne7+–) 13...Kf7 14.Nd4 dc4 15.f4 gf4 (15...g4+–) 16.Qh5 Kg7 (16...Ng6 17.Rf4 Kg7 18.Rg4+–) 17.Rf4 Ng6 18.Rg4 Qf6 (18...Qe8 19.Ne4 e5+–) 19.Rf1 Qf1 20.Kf1 Nd7 (20...Bd7 21.Qg6 Kf8 22.Qf6 Ke8 23.Rg8) 21.Qg6 Kf8 22.Qe6 a5 (22...Nf6 23.Qf6 Ke8 24.Rg8 Kd7 25.Qd8) 23.Rg8 1–0. Pierre – GuestBOpot, internet, 2020.

4.a3 Bf5

5.c4 Nd7 6.Nf3 Ngf6 7.h3 Qc7 (7...e6 8.Nh4=) 8.Nc3 (8.cd5 Nd5 9.d3 Bg6=) 8...Rc8 (8...dc4 9.Bc4 Nb6 10.Be2=) 9.Nd4 Bg6 10.cd5 cd5 11.Qa4 (11.Nf3 Qd8=) 11...a6 12.Rc1 e5 13.Nf3 Bd6 (13...Qd6=) 14.Na2 (14.Qb3 Qb6=) 14...Qb8 (14...Bc2 15.Qa5+=) 15.Nh4 (15.Nc3 0–0=) 15...0–0 16.Ng6 hg6 (16...Rc1 17.Nc1 fg6 18.Be2+=) 17.Be2 (17.Nc3 Rfd8=) 17...Rc1 18.Nc1 Rc8 19.0–0 Nb6 (19...Qc7 20.Rd1+=) 20.Qd1 (20.Qb3 Qc7+=) 20...Nc4 (20...Qc7 21.Nb3=) 21.Bc4 Rc4 22.d3 Rc6 23.Nb3 b6 24.Qd2 Qc7 25.Rc1 Ne8 26.Rc6 Qc6 27.Qc3 Qc3 28.Bc3 Nc7 29.a4 Kf8 30.Kf1 b5 31.a5 Ne6 32.Ke2 Ke8 33.g3 Kd7 34.d4+= ed4 35.Nd4 Nd4= 36.ed4 Ke6 ½–½. De Visser,Arno – van der Veen, 1983.

5.c4 e6 6.Nf3 c5 7.Qb3 Ne7 8.b5 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Nd7 12.Be2 dc4 13.Bc4 Nd5 14.0–0 Qd6 15.Nc3 Nb4 16.d4 Nb6 17.dc5 Qc5 18.Be2 Be7 19.Na4 Na4 20.Qa4 0–0 21.Bd4 Qc7 22.Qa1 f6 23.Rc1 Qd7 24.Bc5 Bc5 25.Rc5 Bd3 26.Qd4 (26.Qd1 Rd8 27.Nd4 Be2 28.Qe2 Nd5=) 26...Qd4 27.Nd4 Be2 (better is 27...Ra8!? 28.h4 e5 29.Bd3 Nd3–/+) 28.Ne2= Rd8 29.g3 e5 30.Rc7 b6 31.Rc4 Rd2 32.Rb4 Re2 33.Rc4 (better is 33.Kg2!?=) 33...Rb2–/+ 34.Rc8 Kf7 35.Rc7 Kg6 36.Rb7 Rb5 37.Kg2 Rb2 38.g4 b5 39.h4 b4 40.Kg3 b3 41.Kg2 Rb1 42.h5 Kh6 43.Kf3 b2 44.Kg2 g6 45.hg6 hg6 46.e4 Kg5 47.Kf3 f5 48.gf5 gf5 49.ef5 e4 50.Ke2 Kf5 51.Rf7 Ke6 52.Rb7 e3! 53.fe3 (53.Ke3 Re1) 53...Rh1 (54.Rb6 Ke5 55.Rb5 Kd6 56.Rb6 Kc5 57.Rb2 Rh2 58.Kf3 Rb2–+) 0–1. Kotsaga,Vasilisa – Burova,Alexandra, RUS–ch U14 Girls, 2000.

5.c4 e6 6.Nf3 Nd7 7.Nc3 Ngf6 8.d4 Be7 9.Be2 Qc7 10.Rc1 b6 11.cd5 ed5 12.Qb3 Qd6 13.Na4 Ne4 14.0–0 Bf6 15.Rfd1 0–0 16.Nc3 Nc3 17.Bc3 Rac8 18.b5+= Rfd8 19.bc6 Qc6 20.Bb5 Qb7 21.Qa4 Nb8= 22.Bb4 a6 23.Be2 Rc1 24.Rc1 Rc8 25.Qd1 Rc1 26.Qc1 Qc8 27.Qf1 b5= 28.Ne1 Nc6 29.Bc5 Na5 30.Bd3 Nc4 31.Bf5 Qf5 32.Nd3 Qd7 (32...Bd8 33.Qd1=) ½–½. Kleinke,Uwe – Potthammel,Joerg, Germany, 2005.

5.Nf3 a5 6.b5 Nd7 7.Nh4 Be6 8.Be2 Ngf6 9.f4 Nc5 10.Bd4 Bd7 11.Nf3 e6 12.0–0 cb5 13.Nc3 Be7 14.Bb5 0–0 15.Ne5 Qc7 16.a4 Bc6 17.d3 Nfd7 18.Qg4 f6 19.Nd7 Qd7 20.Qg3 Bb5 21.ab5 Rfc8 22.Ra2 Qe8 23.f5 e5 24.Nd5 ed4 25.ed4 Rd8 26.Qf3 Bf8 27.dc5 Qb5 28.c4 Qc5 29.Kh1 b5 30.Qe4 Re8 31.Qg4 Qd6 32.Qf3 bc4 33.dc4 Qe5 34.Ra4 Bc5 35.g3 Reb8 36.Rd1 Ra6 37.Ra2 Re8 38.Kg2 Raa8 39.Rdd2 Rac8 40.Qg4+= Qe4 ½–½. Borrmann,Fritz (2075) – Sternik,Ryszard (1935), EM Tiger Temat, 2006.

5.Nf3 Nd7 6.c4 dc4.

5.Nf3 Nd7 6.c4 e6 7.Nc3 Ngf6 8.d4 Be7 9.Rc1 0–0 10.Be2 dc4 11.Bc4 Ne4 12.0–0 Nd6 (12...a5 13.Na4 Qd8 14.Nc5=) 13.Be2 a5 14.Qb3 ab4 15.ab4 Ne4 16.b5 Ndf6 17.Na4 Qa5 18.Ra1 (18.bc6? Qa4 19.Qb7 Ra7–+) 18...cb5 (18...Nd2 19.Nd2 Qd2 20.Nc3=) 19.Bb5 Rac8 20.Bd3 Qd5 21.Qd5 Nd5 22.Ba3 (22.Rfc1 Rc1 23.Rc1 Ra8=+) 22...Ba3 23.Ra3 Rc7 (23...Nd6 24.Bf5 ef5 25.Rb3=) 24.g4 Bg6 25.Ne5 Nd2 (25...Nd6 26.Ng6 hg6 27.Rb1=) 26.Bg6 (26.Ng6 hg6 27.Rd1 Nc4=) 26...fg6 (26...Nf1!? 27.Bf7 Rff7 28.Kf1 Rc1 29.Kg2 Rf8=) 27.Rfa1 (better is 27.Rd1 Ne4 28.f3+=) 27...Nf3? (better is 27...b6!?+=) 28.Kh1?? (better is 28.Nf3 Rf3 29.Nc5+–) 28…Nd2?? (better is 28...Ne5 29.de5 Rf2–+) ½–½. Poschmann,Hans – Woelfelschneider,Peter, email 4AMM–F, 1998.

5.Nf3 Nd7 6.c4 e6 7.c5 Qc7 8.d4 Ngf6 9.Nh4 Be7 (9...Be4 10.Nc3=) 10.Nf5+= ef5 11.Qf3 g6 12.Bd3 Ne4 13.g3 (13.0–0 0–0–0+/–) 13...0–0 (13...h5 14.Nc3=) 14.Nc3 (14.0–0 Rfe8+=) 14...Bf6 15.Qe2 Rfe8 16.0–0 Re6 17.a4 (17.Qc2 Rae8+=) 17...a5= 18.Be4 fe4 19.b5 Bg7 20.b6 Qd8 21.Kg2 f5 22.h4 f4 23.gf4 Qh4 24.Rh1 Qe7 25.Ba3 Nf6 26.Rag1 Nh5 27.Qd2 Qf7 28.Qd1 Rf8+= 29.Bc1 Nf6 30.Ne2= Nd7 31.Kf1 h6 32.Ke1 g5 33.Bd2+/– Nf6 34.Ba5 Nh5 35.Bd2 gf4 36.ef4 Kh7 37.Be3 Rf6 38.Qd2 Nf4 39.Nf4 Rf4 40.Rg2 Rf6+= 41.Rgh2 Qe6 42.a5 Ra8 43.Kd1 Rg6= 44.Kc2 Qf5 45.Kb3 Qe6 ½–½. Straessner,Alfred – Dorawa,Bernhard, Zwickau DDR–ch, 1955.

5.Nf3 Nd7 6.c4 Ngf6 7.c5 Qc7 8.Be2 g6 9.0–0 Bg7 10.d3 0–0–0 11.Nbd2 Rhg8 12.Qc2 e5 13.h3 Nf8?? (13...h6 14.Qa4 Kb8 15.d4=) 14.a4?? (better is 14.Be5 Qe7 15.Qa4+–) 14...e4 15.de4 de4 16.Nd4 Qd7 (16...Nd5!? 17.b5 Nf4+/–) 17.Rfd1 Bh3? (17...Qc7 18.b5 Rd5 19.Bc4+–) 18.Ne4 (better is 18.gh3 Qh3 19.Ne4+–) 18...Bf5?? (better is 18...Ne4 19.Qe4 Be6+/–) 19.Nf5+– Qf5 20.Rd8 (better is 20.Bf6 Bf6 21.Bg4 Qg4 22.Nf6 Rd1 23.Rd1 Qb4 24.Ng8+–) 20...Kd8 21.Qd2 N8d7? 22.Nd6 Qd5 23.Qd5 Nd5 24.Bg7 Rg7 25.Nb7 Ke7 26.Bf3 Nb4+= 27.Rb1 Na6 28.Bc6+/– Nac5 29.Nc5 Nc5+= 30.Rb5 Na4?? 31.Rb7+– (31.Rb7 Kf8 32.Ba4+–) 1–0. Hal1958 – Grachev, playchess.de, 2005.

5.Nf3 e6 6.c4 Nd7 7.c5 Qc7 8.Nd4 Ngf6 9.Nf5 ef5 10.f3 Be7 11.Be2 0–0 12.0–0 f4 13.e4 de4 14.fe4 Ne4 15.Bf3 Ndf6 16.d3 Ng5 17.Nd2 Rad8 18.h4 Nf3 19.Nf3 (19.Qf3 Qd7 20.Qf4 Qd3–/+) 19...Ng4 20.Ng5 (better is 20.Bd4!?–/+) 20...Ne3–+ 21.Qf3 Nf1 22.Rf1 Qd7 23.Qf4 Bg5 (23...Qd3?! 24.Qe5 Bc5 25.bc5+=) 24.hg5? (better is 24.Qg5 f5 25.Be5–/+) 24...Qd3–+ 25.Bg7 (25.Be5 Qg6 26.Bd6–+) 25...Kg7 26.Qf6 Kg8 27.g6 (27.Rf3 Qg6–+) 27...Qd4 (better is 27...Qe3!? 28.Qf2 Qf2 29.Rf2 fg6 30.Rb2–+) 28.Qd4 Rd4 29.gh7 Kh7 30.Rf2 Kg7 31.Rf3 Rfd8 32.Rg3 Kf8 33.Rf3 Rd3 34.Rf1 Rd1 (34...Ra3 35.Kh2–+) 35.Rd1 (35.g4 R1d3 36.a4 R8d4–+) 35...Rd1 36.Kf2 Ra1 37.Ke2 Ra3 38.g4 (38.Ke1 Rb3 39.b5 Rb5–+) 38...Ra4 39.Kd2 (39.b5 cb5 40.g5–+) 39...Rb4 40.Kc3 Rb5 41.Kc4 a5 42.g5 a4 43.g6 fg6 44.Kc3 a3 45.Kc2 a2 46.Kd3 a1Q 47.Ke4 Rc5 48.Kf3 Qa4 49.Ke3 Rb5 50.Kd3 Rb3 51.Kc2 Qa2 (52.Kd1 Rb1#) 0–1. maaxa – ariovist, Live Game Caissa's Web, 2004.

5.Nf3 Bg4 6.Be2 Bf3 7.Bf3 Nd7. bispo (2000) – xina (2110), net–chess.com, 2011.

5.Nf3 h6 6.c4 e6 7.Bd4 Qd8 8.cd5 ed5 9.Be2 Nf6 10.0–0 Bd6 11.d3 0–0 12.Bc5 Bc5 13.bc5 Qe7 14.Qb3 Qc7 15.Rc1 Nbd7 16.Qc2 Bg4 17.Nbd2 Bh5 18.Nd4 Be2 19.Ne2 Rab8 20.Rab1 Ne5 21.Ng3 Rfd8 22.d4 Ned7 23.Nf3 g6 24.Ne1 Re8 25.Nd3 h5 26.Nf4 h4 27.Nf1 Nf8 28.Nd2 g5 29.Nh3 Ng4 (29...g4 30.Nf4+=) 30.Nf1+/– f6 ½–½. Mai,Wolfgang (2045) – Carter,Maurice H (1705), DJ–CT18/pr34, 2011.

5.Nf3 Nf6

6.c4 dc4 7.Bc4 c5 8.Qa4 Nbd7 9.0–0 +=.

6.c4 dc4 7.Bc4+= e6 8.0–0 Qc7 (8...Bd6 9.d3 Nbd7 10.h3=) 9.Nc3 (9.Bf6 gf6 10.d4 a5+=) 9...Bd6 10.d4 (10.Qe2 b5 11.Bb3 0–0+=) 10...h6 (10...0–0 11.Rc1=) 11.Re1 (11.Qe2 Ne4+=) 11...Be4 (11...a5 12.e4 ab4 13.ab4 (13.ef5?! bc3 14.Bc3 b5+/–) 13...Ra1 14.Ba1 Ne4 15.Ne4 (15.Re4?! Be4 16.Ne4 Bb4+=) 15...Bb4 16.Re2+–) 12.Ne4+/– Ne4 13.Bd3 Ng5 14.g3 (14.Ne5 Be5 15.de5 Nd7+/–) 14...Nd7 15.e4 Kf8 (15...Rd8 16.Rc1+/–) 16.Rc1 Re8 (16...Ke8 17.b5+/–) 17.b5 c5 18.e5 Be7 19.Bc4 (19.h4 Nf3 20.Qf3 Kg8+/–) 19...Nb6 (20.Be2 Nf3 21.Bf3 c4+/–). Sokolowski,Mieczyslaw – Karczynski,L, Poland–ch sf corr, 1993.

6.c4 Nbd7 7.c5 Qc7 8.Be2 e6 9.0–0 Be7 10.d4 0–0 11.Nh4 Be4 12.Nd2 h6 13.Ne4 de4 14.g3 Nd5 15.Ng2 f5 16.Nf4 Nf4 17.gf4 Nf6 18.Kh1 Nd5 19.Bc4 Bf6 20.Bd5 ed5= 21.Qh5 Bd8 22.Rg1 Rf6 23.Rg3 Qf7 24.Qh3 Rg6 25.Rag1 Rg3 26.Rg3 Kh7 27.Rg1 b5 28.cb6 ab6 29.Rc1 Qe6 30.Rg1 Be7 31.Rc1 g6 ½–½. Verhaeren,Gertjan – Popstein,Sheila, TE.2004.P.01713, 2004.

6.c4 Nbd7 7.d4 e6 8.Nc3 Be7 9.Be2 0–0 10.0–0 h6 11.Re1 Rfe8 12.Nd2 Bh7 13.Rc1 1–0. Howes,Tony – Popstein,Sheila, IECG, 2004.

6.c4 Nbd7 7.cd5 cd5 8.Nc3 e6 9.Nh4 Bg6 10.Rc1 a6 11.Be2 Be7 12.0–0 0–0 13.Ng6 hg6 14.Na4 Qa7 15.Bd4 b6 16.Qb3 Rfc8 17.d3 Ne8 18.Qb2 Bf6 19.Bf6 Nef6 20.d4 Ne4 21.f3 Nd6 22.e4 Qb7 23.e5 Nc4 24.Bc4 Rc4 25.Qd2 Rac8 26.Nb2 Rc1 27.Rc1+= Rc1 28.Qc1 Nb8 29.Kf2 Nc6 30.Qc3 Na7 31.a4 Qc6 32.Qd2 Qc7 33.f4 Qe7 34.g3 Nc6 35.Nd3 Qb7 36.Qc3 Na7 37.Nb2 Qc6 38.Qd2 Qd7 39.Ke3 Qc7 40.Kd3 Qc6 41.Qc3 Qd7 42.Ke3 Kh8 43.g4 Kg8 44.Ke2 Kf8 45.Kd2 Kg8 46.h3 Kf8 47.Kd3 (47.Kd1 Kg8=) ½–½. Kocandrle,Jaroslav (2140) – Popstein,Sheila, TE.2004.P.01713, 2004.

6.c4 Nbd7 7.cd5 cd5 8.Be2 e6 9.Nh4 Bg6 10.Nc3 (10.Bd4 Qd6+=) 10...Be7 (10...Bd6 11.f4=) 11.0–0 (11.Ng6 hg6 12.Rc1 a6+=) 11...0–0 12.Ng6 hg6 (12...fg6 13.Rc1+=) 13.Qb3 (13.Nb5 e5+=) 13...Rfc8 14.Rfc1 Qd8 (14...a5 15.Na4 Qd8 16.Rc8 Rc8 17.ba5 Qa5 18.Bf6 Bf6 19.d4= (19.Qb7?? Rc7 20.Qc7 Qc7–+)) 15.Nd1 (15.Rc2 Rc7+/–) 15...Ne8 (15...Bd6 16.Bd4+=) 16.d3 (16.Qd3 a5 17.b5 Nef6+/–) 16...Bf6 (16...Bd6 17.Qa4+=) 17.Rc8 Rc8 18.Rc1 Rc1 19.Bc1 Qc7 20.Bb2 Bb2 21.Qb2 Nd6 22.h3 a6 23.Qc3 Qc3 24.Nc3 Kf8 25.Kf1 Ke7 26.d4 Nb6 27.a4 Nbc4 28.Bc4 Nc4= 29.h4 Kd6 30.Ke2 Kc6 31.f3 Na3 32.Kd3+= Nc4 33.a5 Nb2 34.Kc2 Nc4= 35.Kd3 Nb2 36.Kc2 Nc4= 37.Kd3 Nb2 ½–½. Alvarez Villar,Horacio Nelson – Popstein,Sheila, TE–2004–P–01712, 2004.

6.c4 Nbd7 7.Nh4 Be6 8.c5 =.

6.d4 a5 7.c3 ab4 8.cb4 e6 9.Nh4 Nbd7 (9...Be4!?+=) 10.Nf5+= ef5 11.Bd3 g6 12.h3 Bd6 13.Nd2 h5 (13...0–0 14.0–0=) 14.0–0+= Ne4 15.Ne4 (15.Rc1 Ndf6+=) 15...fe4= 16.Be2 Bb8 17.f3 ef3 18.Rf3 Qc7 19.Bd3 f5 20.b5 Qh2 21.Kf2 Nf6 22.Qg1 Ne4 23.Ke2 Qg1 24.Rg1 cb5 25.Bb5 Ke7 26.Rc1 Bd6 27.a4 h4 28.Kd1 Ke6 29.Rf1 Rhc8 30.Rc8 Rc8 31.Bd3 Ra8 32.Bc2 Bb4 33.Rf4 Be7 34.Rf1 Bd6 ½–½. Pcmvr – Sheilapopc, playchess.de, 2005.

6.d4 e6 7.Nh4 Bg4 8.f3 Bh5 9.g4 g5 10.gh5 gh4 11.f4 Nbd7 12.Rg1 0–0–0 13.Nd2 Be7 14.c4 Rdg8 15.Rg5 h6 16.Rg8 Rg8 17.cd5 ed5 18.Rc1 Bd6 19.Qf3 a5 20.b5 Rg1 21.Qe2 Rg4 22.Nf3 a4 23.bc6 bc6 24.Ne5 Ne5 25.fe5 Rg1 26.ef6 Kb7 27.Qc2 h3 28.Kf2 Bh2 29.Ba1 Kc7 30.Bh3 Rc1 31.Qc1 Kb7 32.Bf5 Qd8 33.Qb1 Ka7 34.Qc2 Qf6 35.Kg2 Bd6 36.Qa4 Kb8 37.Bg4 Qg5 38.Qd1 Qe3 39.a4 Qg3 40.Kf1 Qf4 41.Bf3 Qe3 42.Kg2 Qg5 43.Kf2 Qg3 44.Kf1 Qh3 45.Ke2 Qh2 46.Kd3 f5 47.Qe2 Qg1 48.Bb2 f4 49.Kc2 Kb7 50.a5 Qe3 51.a6 Ka7 52.Bc3 Kb8 53.Qg2 Ba3 54.Qg8 Ka7 55.Qc8 Qe7 56.Qc6 Qh7 57.Kd2 Qe7 58.Qd5 Bd6 59.Qa8 Kb6 60.a7 Qe3 61.Kc2 Qf2 62.Kb3 Qf3 63.Qf3 Ka7 64.Qc6 f3 65.Qd6 f2 66.Qc7 Ka8 67.Bb4 f1Q 68.Qc8 Ka7 69.Bc5 1–0. Bonetti,Shane – qsac (2255), ICC, 2002.

6.d4 e6 7.Nh4 Bg4 8.f3 Bh5 9.g4 g5 10.gh5 gh4 11.f4 Nbd7 12.Rg1 0–0–0 13.Nd2 Be7 14.Be2 Rdg8 15.Rg8 Rg8 16.Rb1 Rg1 17.Nf1 h3 18.Bf3 Ne4 19.Ke2 Bh4 20.c4 f5 21.cd5 ed5 22.Qa4 Ndf6 23.Nd2 Bf2 24.Nf1 Ng4 25.Ba1 Bh4 26.Rd1 Nef6 27.b5 Nh5 28.bc6 Qc6 29.Qc6 bc6 30.Bb2 Nhf6 31.Rc1 Kc7 32.a4 Ne4 33.Ba3 a5 34.Bb2 Bf6 35.Ba3 h5 36.Bb2 h4 37.Ba3 Kd7 38.Bb2 c5 39.Rd1 c4 40.Rc1 Kc8 41.Re1 Be7 42.Rc1 Bb4 43.Nd2 Rc1 44.Be4 Re1 45.Ke1 fe4 46.Ke2 Nh2 47.Nf1 Ng4 48.Bc1 h2 0–1. Bonetti,Shane – qsac (2255), ICC, 2002.

6.Bd4 Qc7 +=.

4.a3 Nf6

5.c4 a5 6.c5 Qc7 7.f4 (7.Nf3 ab4 8.ab4 Ra1 9.Ba1 b6=) 7...g6 (7...ab4 8.Be5 Qd8 9.ab4 Ra1 10.Ba1=) 8.Nf3 (8.Be5 Qd7+=) 8...Bg7 9.Be2 (9.Be5 Qd7+=) 9...Bg4 (9...ab4 10.ab4 Ra1 11.Ba1=) 10.Nc3 (10.Be5 Qd8+=) 10...0–0 (10...ab4 11.ab4 Ra1 12.Qa1=) 11.0–0 Ne4 (11...ab4 12.ab4 Ra1 13.Qa1=) 12.Qc2+= ab4 13.ab4 Na6 14.Ba6 (14.Ne4 Nb4 15.Qb3 A) 15...de4? 16.Ra8 (16.Qb4?! ef3 17.Bf3 Ra1 18.Ba1 Bf3 19.gf3 f6=) 16...Ra8 17.Ng5+– (17.Qb4?! Bb2 18.Qb2 ef3 19.Bf3 Bf3 20.Rf3 Ra6+=); B) 15...Ra1 16.Ra1 de4 17.Bg7 Kg7 18.Qb4 ef3 19.gf3 Bf5+=) 14...Nc3 (14...Ra6 15.Ra6 ba6 16.Ne4 Bb2 17.Qb2 de4 18.Qe5 Qe5 19.Ne5+=) 15.Bc3 (< 15.dc3 Ra6 16.Ra6 ba6=) 15...Bc3 16.Qc3 Ra6 17.Ra6 (17.Ne5 Bf5+/–) 17...ba6+= 18.Nd4 Ra8 19.f5 a5 (19...Bf5 20.Nf5 gf5 21.Rf5+/–) 20.ba5 (20.fg6 hg6 21.ba5 Qa5 22.Qa5 Ra5 23.Nc6 Rc5 24.Ne7 Kg7+/–) 20...Ra5 (20...Bf5 21.Ra1+=) 21.f6 (21.fg6 hg6 22.Nc6+=) 21...Ra6+= 22.Ra1 Ra1 23.Qa1 ef6 24.Qa8 Kg7 25.Qc6 Qc6 26.Nc6 Kf8 27.Nb4 1–0. Jentsch,KD – Henze,Heiko, H202E BdF, 1995.

5.c4 a5 6.Bd4 Qc7= 7.b5 (7.Nf3!?=) 7...e5=+ 8.Bb2 dc4 (8...Bd6 9.cd5 cd5 10.Nc3=+) 9.Bc4= cb5 10.Bb5 Bd7 (10...Nc6 11.Nc3=) 11.Nc3 Nc6 (11...Bd6 12.Nf3=) 12.Rc1 Bd6 (12...Be7 13.Nf3=) 13.Nf3 (13.Bc4 0–0=) 13...0–0 14.h3 (14.Qc2 Qb6 15.Ng5 g6=) 14...Rad8 (14...Qb6 15.Qc2=+) 15.0–0 Qb6 16.Qa4 (16.Qc2 h6 17.a4 Qc5+=) 16...Na7 (16...h6!?=) 17.Bd7+= Nd7 (17...Rd7 18.Rb1 Nc6 19.Nb5+–) 18.Rb1 (18.Ne4 Qb2 19.Nd6 Nb6 20.Qa5 Nc6+–) 18...Nc5+= 19.Qg4 (19.Qc2 Qa6+=) 19...Nd3 (19...Qa6 20.d4 f5 21.Qh4 ed4 22.ed4=) 20.Nd5+= f5 (20...Qa6 21.Nf6 Kh8 22.Nh7+–) 21.Qg7 Kg7 22.Nb6 Nb2 23.Rb2 Ba3 24.Rc2 (24.Ra2 Bb4 25.Ne5 Rf6+= (25...Bd2? 26.Ned7 Bb4 27.Nf8 Kf8 28.Rc2+–)) 24...Nc6+= 25.Nc4 Bd6 (25...e4 26.Ng5 Rf6 27.Na3+=) 26.Rb2 (26.Rb1 Rf7 27.Rcb2 Bb4 28.Nce5 Ne5 29.Ne5 Re7+–) 26...Rf7 (26...Bb4!? 27.Nfe5 Ne5 28.Ne5 Rd2 29.Rd2 Bd2=) 27.Rfb1+– e4 (27...Bb4 28.Nce5 Ne5 29.Ne5+–) 28.Ng5 Re7 29.Rb7 Kg6 (29...Kf6!? 30.Nh7 Kg6 31.Nd6 Rd6 32.Re7 Ne7+–) 30.Re7+– (30.Nd6?! Rd6 31.h4 Rb7 32.Rb7 Rd2 33.Nh7 Ne5=) 30...Be7 31.Ne6 (31.Ne4 fe4 32.Rb6 a4 33.Rc6 Kg7+–) 31...Rc8 32.Rb6 (32.Nf4 Kf6+–) 32...Kf7 33.Nf4 Kf8 34.Rb5 (34.Rb2 Ra8+–) 34...a4+= 35.Nb6 (35.Nd5!? Ra8 36.Nc3+=) 35...a3= 36.Rb1 (worse 36.Nc8 a2 37.Rf5 Ke8–+; worse 36.Rf5 Kg7 37.Ne6 Kh8 38.Nc8 a2 39.Ne7 a1Q 40.Kh2 Ne7 41.Rf8 Ng8–+) 36...Re8 37.Ra1 Kf7 38.Nfd5 Bc5 39.Nc4 Ra8 40.Nc3 Bf8 (40...Na5 41.d4 (worse 41.Na3 Nb3 42.Rb1 Ra3–/+) 41...Bb4 42.Ra3 Ba3 43.Na3=) 41.Ra2 Ke6 (41...Bb4 42.Kf1=) 42.Nb5 (better 42.g4=) 42...Kd5?? (better 42...Ra4 43.Nca3 Na7 44.Nd4 Kf6=) 43.Nca3+– Ra5?? (43...Nb4 44.Ra1 Ra5 45.Rb1+–) 44.Nc3 (better 44.Nc7 Kd6 45.Nc4 Kc7 46.Na5+– (46.Ra5?! Na5 47.Na5 Bb4+–)) 44...Kc5+– 45.Nc2 Ra2 46.Na2 Kc4 47.Ne1 1–0. Chirpii,Alexandru – Shapovalov,Igor, Geller mem op–B 3rd, 2007.

5.c4 a5 6.Nf3 dc4 7.Bc4 ab4 8.Bd4 c5 9.Bc5 Qc5 10.ab4 Qc4 11.Ra8 Nfd7 12.Na3 Qc6 13.0–0 b6 14.Qc1 Bb7 15.Qc6 Bc6 16.Rc1 Bb7 17.Rc7 (17...Kd8 18.Rb7+–) 1–0. Schirmer,Michael (2375) – Sternik,Ryszard, corr 3GMM½–05, 1998.

5.c4 c5 6.cd5 Nd5 7.Bc4 =.

5.c4 Bf5 6.Nf3 Nbd7 7.d4 h6 8.c5 Qc7= 9.Bd3 Ne4 10.Nh4 Bh7 11.0–0 g5 12.Nf3 Bg7 13.Ne1 h5 14.f3 Nef6 15.Bh7 Rh7 16.Nd2 e5 17.e4 0–0–0 18.Qb3 g4 19.de5+= Ne5 20.f4 Ng6 21.e5 Ne4 22.Ne4 de4 23.Rd1 Rhh8 24.Bc1 Rd1= 25.Qd1 Rd8 26.Qe2+/– Bh6 27.Qe4 Ne5? 28.Qf5 Nd7 29.Qh5 Rh8 30.Qg4 b5 31.Nf3 Kb7 32.Rd1 Nf6 33.Qf5 Bg7 34.Bb2 Rh5?? 35.Ng5 Nd5 36.Rd5 cd5 37.Qd5 Ka6 38.Bg7 Qf4 39.Qc6 1–0. Stiefel – Walczyk, Crailsheim–Leinzell, Landesliga, 1991.

5.c4 Bg4 6.Nf3 dc4 7.Bc4 e6 8.0–0 a5 9.Bd4 Qc7 10.b5 c5 11.Bb2 Nbd7 12.a4 Ne5 13.Be5 Qe5 14.Ne5 Bd1 15.Rd1 (15...Bd6 16.Nf3+–) 1–0. Guliyev,Shaig (2285) – Stephenson,Andrew, Baku Cup, 1999.

5.Bd4 Qc7 6.Nf3 Nbd7=+ 7.c4 (7.Bb2=+ e5 8.Nc3 Bd6 9.Be2 0–0 10.h3) 7...a5 (7...e5 8.Bb2=+ e4 9.Nd4 dc4 10.Bc4) 8.c5 (better 8.cd5!? Nd5 (8...ab4 9.dc6 bc6 10.ab4) 9.Nc3+= N5f6 10.Ng5) 8...e6 (8...e5 9.Bb2=+ ab4 10.ab4; 8...g6 9.Qc2 Bg7 10.Bb2) 9.Be2 (9.Bf6 Nf6 10.Nc3 e5=+) 9...e5 (9...Be7 10.Bf6=+ –0.47/9 (10.0–0=+)) 10.Bb2 Be7 (10...ab4 11.ab4 Ra1 12.Ba1=+) 11.d4 (11.Nc3 0–0=+) 11...e4=+ 12.Nfd2 b6 13.Nc3 b5 (13...Ba6 14.0–0=+) 14.ba5 (14.Nb3 a4 15.Na5 0–0=) 14...Qa5= 15.Na2 (15.0–0 0–0=) 15...0–0 (15...Bb7 16.0–0=) 16.Nb4 Qc7 (16...Bb7 17.0–0=) 17.0–0 Nb8 (17...Bb7 18.a4 ba4 19.Ra3=) 18.a4+= Na6? (better 18...ba4!? 19.Ra4 Ra4 20.Qa4 Bg4+=) 19.ab5+– cb5 20.Bc3 (20.Qb3 Bb7+–) 20...Bb7 21.Bb5 (21.Na6 Ba6 22.Qc2 Rfb8+–) 21...Nb4 (better 21...Nc5 22.Ra8 Ra8 23.dc5 Qc5 24.Bf6 Bf6 25.Ne4 de4=) 22.Bb4+– Ra1 23.Qa1 Ra8 24.Qc3 Bc8 (24...Ng4 25.g3 Qc8 26.h3+–) 25.Be2 (25.Ra1 Ra1 26.Qa1 Qb8+–) 25...h5 (25...Bg4 26.f3 ef3 27.gf3+–) 26.Ra1+– Rb8 (26...Ng4 27.Nf1 (27.Ra8?? Qh2 28.Kf1 Qh1) 27...Ra1 28.Qa1+–) 27.Ba5 Qb7 (27...Qc6 28.h3+–) 28.Bb6 (better 28.c6!? Qb2 29.c7 Rb6 30.Qb2 Rb2+–) 28...Qc6 29.Qa5 Bb7 30.Qb4 (30.Qb5 Qc8+–) 30...Bc8 (better 30...h4+–) 31.Qa5 (31.Qa4 Qa4 32.Ra4 Kf8+–) 31...Bb7 32.Qb5 Qe6?? (better 32...Qc8+–) 33.Ba7 Rd8 (33...Re8 34.Qb7 Qc8 35.c6+–) 34.Qb7 h4 (34...Rd7 35.Qb5+–) 35.h3 (35.Ra6 Qd7 36.c6 Qe8+–) 35...g5 (35...Rd7 36.Qb5 Rd8 37.Bb8+–) 36.c6 Bd6 (36...Rc8 37.c7 Ne8 38.Bb6+–) 37.c7 Rc8 (37...Bc7 38.Qc7 Rc8 39.Qa5+–) 38.Bb6 g4 (38...Ne8 39.Ra8 Ra8 40.Qa8 Bc7 41.Bc7 Kg7+–) 39.Ra8 1–0. Oshirov,Eduard – Eliseev,Nikolay, Irkutsk Russia, Baykal Open, 2015.

5.Bd4 Qc7 6.f4 a5 7.Nc3 Bf5 (7...Nbd7 8.Nf3 e6 9.ba5 Ra5 10.Bd3) 8.ba5 Nbd7 9.Nf3 Ra5 10.Be2.

5.Bd4 Qc7 6.f4 Nbd7 7.Nf3 a5 8.ba5 Qa5 9.Bd3 e6 10.0–0 Bc5 11.Nc3 Bd4 12.Nd4 0–0 13.Nb3 Qa7 14.Qf3 Nc5 15.Rfb1 Nd3 16.cd3 b6 17.e4 Ba6 18.e5 Nd7 19.d4 c5 20.a4 Qc7 21.Nb5 Qd8 22.dc5 bc5 23.d4 c4 24.Nd2 Bb5 25.Rb5 Nb8 26.a5 Nc6 27.Qc3 Qd7 28.Rb2 Ra6 29.Nf3 Rfa8 30.Rf2 Ra5 31.Ra5 Ra5 32.Qb2 Qa7 33.Rc2 Ra1 34.Kf2 h6 35.Rd2 Qa4 36.Qc3 Ra3 37.Qc1 c3 38.Rd3 Qb4 39.Qc2 Qb2 0–1. Lange – Woelfelschneider, corr 1996.

5.Bd4 Qc7 6.f4 Nbd7 7.Nf3 a5= 8.Nc3 e6 9.ba5 Qa5 10.Bd3.

5.Bd4 Qc7 6.f4 Nbd7 7.Nf3 e6 8.Nc3 a5 9.ba5 Ra5 10.Bd3.

5.Nf3 c5 6.Be2 =.

5.Nf3 Bf5 6.c4 Nbd7 7.Be2 dc4 8.Bc4 a5 9.Nc3 e6 10.0–0 Bd6 (10...ab4 11.ab4 Ra1 12.Qa1=) 11.b5 0–0 12.Qe2 Bg4 13.d4 c5 (13...Rfc8 14.Bd3=) 14.Na4 Qc7 15.Nc5 (15.dc5 Bh2 16.Kh1 Be5=) 15...Bh2 16.Kh1 (16.Nh2 Be2) 16...Bd6 17.Nd7 Nd7 (17...Qd7 18.e4 Rac8 19.Rfc1=+) 18.Rfc1 Qd8 19.Bd3 (19.Kg1 Rc8=) 19...f5 (19...Qe7 20.e4 Bf4 21.Rc2=) 20.Bc4 (20.Rc3 Nb6=) 20...Qe8 21.Kg1 Rf6 22.Kf1 Rh6 23.Qd3 (23.Qd2 Rh1 24.Ke2 Rh2–/+) 23...Nb6 24.Ba2 Kh8 (24...Rh1 25.Ke2 Rh2 26.Kf1 Bf3 27.gf3=+) 25.Rab1 Rh1 26.Ke2 Rh2 27.Rg1 Rg2!–/+ 28.Rg2 Bf3 29.Kf1 Qh5 30.Kg1 Rf8 31.d5 e5 32.e4 fe4 33.Qe3 Rf4 34.Kf1 Rh4 35.Ke1 Rh1 36.Kd2 Rb1 37.Qb6 Qh6 38.Qe3 Rb2 39.Kc3 Qe3 (40.fe3 Rg2–+) 0–1. halocan (1735) – pierre (2130), internet, 2007.

5.f4 e6 6.Nf3 Nbd7 7.c4 a5 8.Bd4 Qc7 9.Qb3 b6 10.b5 c5 11.Bb2 d4 12.ed4 Qf4 13.Qe3 Bd6 (13...Qe3 14.de3 Bb7 15.Bd3=) 14.Nc3 (14.Qf4 Bf4 15.dc5 Nc5 16.Bf6 gf6=) 14...cd4 15.Qf4 Bf4 16.Nd4 (16.Ne2 Bd6 17.Ned4 Bb7=) 16...Bb7+= 17.Be2 Bg2 18.Rg1 Bb7 19.Rg7 (19.Nc6!?–/+) 19...Kf8–+ (worse is 19...Bh2 20.Nc6+=) 20.Rg3 (20.Rg1 Bh2 21.Rf1 Bg2–+) 20...Bg3 21.hg3 Rc8 (21...Rg8 22.Na4–+) 22.0–0–0 (22.Kf2 Rg8 23.d3 Ng4 24.Bg4 Rg4–+) 22...Rg8 23.Rg1 Ne5 (better is 23...h5–+) 24.d3 Ke7 25.Na4 Nfd7 26.g4 h6 27.Nc3? Nc5 28.Kc2 Rgd8 29.Nb3?? Ncd3 30.Ba1 Nf4 31.Bd1 Nc4 0–1. Lapshun,Yury (2440) – Korchnoi,Victor (2565), Quebec Blitz, Montreal CAN, 2004.

5.f4 Bg4 6.Nf3 e6 7.Nc3 Nbd7 8.Be2 Bd6 9.Na4 Qc7 10.Bf6 Nf6 11.d4 b6 12.Nd2 h5 13.c4= Rc8 14.c5 Be7 15.Nc3 Be2 16.Qe2 bc5 17.bc5 Qa5 18.Qd3 Rb8 19.0–0 g6 20.Na2 Qb5 21.Qb5 Rb5 22.Rab1 Kd7 23.Nc3 Rb1 24.Rb1 Kc7 25.h3 Nd7 26.Nf3 f6 27.g3 e5 28.h4 e4 29.Ne1 g5 30.Ng2 Rg8 31.Kh2 Rb8 32.Rb8 Kb8 33.hg5 fg5 34.fg5 Bg5 35.Nf4 Nf6 36.Kh3 Ng4 37.Nd1 Kb7 38.Kg2 Ka6–+ 39.Kf1 Kb5 40.Ke2 h4?? 41.gh4= Bh4 42.Nb2 Bg5 43.Ng2 Nh6–/+ 44.Ne1 Nf5 45.Nc2 Bd8 46.a4 Ka5–/+ 47.Kd2 Bg5 48.Ke2 Nh4?? 49.Kd2–/+ Nf3 50.Ke2 Bh4 51.Kd1 Bf2 52.Ke2 Bg1 53.Kd1 Be3 54.Ne3 Nd4 55.Nc2 Nc2 56.Kc2 Kb4 57.Nd1 Kc5 58.Nc3?! a5 59.Kb3 Kd4 60.Na2 Kd3 0–1. Lukac,J (2115) – Gerbery,R (2175), TCh–SVK Extraliga, 2011.

5.Nf3 Bg4

6.c4 Na6 7.h3 Bf3 8.Qf3 Qd8 9.Bf6 (not finished, 1–0). Flazinski,Pawel – Gouaichault,Sebastien, corr or01–014, 2002.

6.c4 dc4 7.Bc4 Nbd7 8.0–0 e6 9.d4 a5 10.Nc3 ab4 11.ab4 Ra1 12.Qa1 Bf3 13.g3 (13.gf3 Be7 14.Qa8 Bd8 15.b5 0–0 16.Na4 Qc7 17.Qa7 cb5 18.Bb5 Qc2) 13...Be7 14.Qa8 Bd8 15.b5 0–0 16.Na4 Qc7 17.Qa7 cb5 18.Bb5 Qc2 19.Qb7 Bb7 0–1. Dopper,Johan – Schirmer,Michael, TKM/SF/02, 2001.

6.Be2 c5 7.0–0 Nbd7 =.

6.Be2 c5 7.Bf6 ef6 8.Nc3 +=.

6.Be2 c5 7.Bf6 gf6 8.Nc3 e6 9.Na4 +=.

6.Be2 c5 7.Bf6 Qf6 8.d4 cd4 9.Qd4 Qd4 10.ed4 a5 11.b5 e6 12.Nbd2 Bd6 13.c4 0–0 14.c5 Bf4 15.h3 Bf5 16.g3 Bd2 17.Kd2+/– Be4 18.Rhe1 h6 19.Rac1 Bf5 20.Nh4+– Bh3 21.Rh1 g5 22.Rh3 gh4 23.Rh4 Kg7 24.g4 (24...Nd7 25.Bd3+–) 1–0. Pech,Jaroslav – Gouaichault,Sebastien, corr or01–014 E–mail, 2002.

6.Be2 Nbd7 7.0–0 a5 8.Nc3 e5 9.b5 Bd6 10.bc6 bc6+= 11.Rb1 Qc7 12.h3 e4 13.hg4+/– ef3 14.Bf3 Ne5 15.Be2 Qe7 16.f4 Ng6 17.g5 Nd7 18.Bg4 Nc5 19.Ne2+/– Ne6 20.f5 Ng5 21.fg6 hg6 22.Nf4 Ne4 23.Bh3 Qh4? 24.c4 g5 25.Bg7 Rh7 26.Qb3 Rg7 27.Qb7 Rd8 28.Ne6! (28.Ne6 Bh2 29.Kh2 Qg3 30.Kg1+–) 1–0. Rosner,Dirk – Baumann,M, email, 1999.

6.Be2 e6 7.0–0 Nbd7 8.Nc3 Bd6 9.Nd4 Be2 10.Nce2 a5 11.c3 0–0 12.Qc2 Qc7 13.d3 Bh2 14.Kh1 Bd6 15.c4 ab4 16.ab4 Bb4 17.cd5 Nd5 18.e4 N5b6 19.f4 Qd6 20.Nf3 Qc5 21.Qc5 Nc5 22.Ra8 Ra8 23.Ne5 f6 24.d4 Ne4 25.Nd3 Bd6 26.Ra1 Ra1 27.Ba1 Nd5 28.g3 h5 29.Kh2 b5 0–1. Trkn – WFMS, itsyourturn.com, 2000.

6.Bf6 ef6 7.d4 a5 8.b5 cb5 9.Nc3+= b4 10.Nd5 Qd8 11.Bb5 Nc6 12.Nf4 g5 13.d5 Qb6 14.dc6 Qb5= 15.cb7 Qb7 16.Nd5 0–0–0 17.c4 bc3= White gets strong play along the open b–file 18.e4 Bc5 19.0–0 f5 20.Rb1 Qc6 21.Qb3+/– Bf3 22.gf3 fe4 23.Rfd1 c2 24.Ne7! Kc7 25.Nc6 cd1Q 26.Rd1 Rd1 27.Qd1 Kc6 28.fe4 h6 29.Qd5 Kb6 30.Qb3 Kc6 31.a4 Rf8 32.Qb5 Kd6 33.Qa5 Rc8 34.Qa6 Rc6 35.Qb7 Rc7 36.Qd5 Ke7 37.a5 (37...f6 38.a6+–; 37.Qe5 Kd7+–) 1–0. Zednik,Martin – Bonetti,Shane, Orang–Utan Invitational, 2002.

6.h3 Bf5 =.

6.h3 Bh5 +=.

3.e3 Qc7

4.a4 e5 5.b5 Bd6 6.g3 (6.bc6 bc6 (6...Qc6?? 7.Bb5+–) 7.c4 Nf6=+) 6...Bd7 (6...Nf6!?–/+) 7.f4= f6 8.c4 (8.Qh5 g6 9.Qh4 Bf5=+) 8...cb5 (8...Ne7!?=) 9.ab5 (worse 9.cd5 b4=+) 9...dc4 10.Qa4 a6 (10...Na6 11.Bc4 Ne7 12.Nc3=) 11.Bc4 (better 11.Nc3+–) 11...Qb6?? (better 11...ef4 12.gf4 ab5 13.Qa8 bc4=) 12.Qb3 (12.fe5!? Be5 13.Be5 fe5+–) 12...Ne7 13.Bf7 (13.fe5 Be5 14.Nc3 Nf5+–) 13...Kd8 (13...Kf8!? 14.Nc3 ef4 15.gf4 Bf5+–) 14.Nc3+– Rf8 (14...ef4 15.gf4 Bf5 16.Nf3+–) 15.Nf3 Bb5? (better 15...Bf5 16.Be6 Be6 17.Qe6 Bc5+–) 16.Nb5 (better 16.fe5!? Be5 17.Ne5 fe5 18.Nb5 Nd7+–) 16...Rf7 17.Qf7 Qb5 18.fe5 Qb2 (18...fe5 19.Qf8 Kd7+–) 19.ed6 Qa1 (19...Nec6 20.0–0 b6+–) 20.Kf2 Qa5 21.de7 Kc8 22.e8Q (22.e8Q Qd8 23.Rc1 Nc6 24.Rc6 Kb8 25.Qd8 Ka7 26.Qb7 Kb7 27.Qc7; 22.Rc1 Nc6 23.e8Q Qd8 24.Rc6 Kb8 25.Qd8 Ka7 26.Qb7 Kb7 27.Qc7) 1–0. GuestLTGF – GuestGZCR, freechess.org, 2020.

4.c4 dc4 5.Bc4 Nd7 6.Nf3 Nb6 (6...Ngf6 7.Nc3+=) 7.Be5+– Qd8 8.Be2 Nf6 9.b5 Bf5 (9...cb5 10.Bb5 Bd7 11.Nc3+–) 10.bc6 bc6 11.Nd4 Bd7 12.0–0 e6 13.Nc3 Be7 14.Rb1 0–0 15.Qc2 Nfd5 16.Nd5 (16.Ne4 c5 17.Nb5 f6+–) 16...cd5 17.Bc7 Qe8 (17...Qc8 18.Rfc1+–) 18.Ba6 Nc4 19.Bc4 dc4 20.Qc4 Rc8 21.f4 Bd6 22.Rb7 a6 23.Rfb1 Bb5 24.Qc3 (worse 24.Nb5 ab5 25.Qc2 f6=+; 24.R7b5?? Rc7 25.Qd3 ab5 26.Nb5 Rd7 27.Nd6 Qd8–+) 24...e5 25.Nf5 (25.R1b5? ed4 (25...ab5?! 26.Nb5 Bc7 27.Nc7–/+) 26.Qd4 Bc7–+; 25.Nb5?! ab5 26.fe5 b4+–) 25...Bc7 26.Rc7 Rc7 27.Qc7 ef4 28.Qf4 (28.ef4?! Qe4 29.Ne7 Kh8=) 28...Qe6 29.Rb2 Qf6 30.Nd4 Qf4 31.ef4 Bd7 (31...Bd3 32.Kf2+–) 32.Rb6 a5 33.Rd6 Bg4 (33...Be6 34.a3+–) 34.Ra6 Rd8 35.Nc6 Re8 36.Ra5 h6 (36...g6 37.d4+–) 37.d4 Be6 (37...Bd1 38.d5 Re1 39.Kf2 Re2 40.Kf1+–) 38.d5 Bd7 (38...Bf5 39.d6 Bd7 40.Ne5+–) 39.Ra7 Bg4 (39...Bc6 40.dc6 Kf8+–) 40.h3 Bd1 (40...Bc8+–) 41.d6 Be2 (41...Re1 42.Kh2 Be2+–) 42.d7 Rf8 43.Rb7 Ba6 44.Rb8 White prepares d8 44...Rb8 45.Nb8 Bb5 46.d8Q (46.d8Q Kh7 47.Qd5 Be2 48.Nc6 Bb5 49.Qb5 h5 50.Qd5 Kh8 51.Qf7 Kh7 52.Ne7 h4 53.Qh5) 1–0. Dalia – Zardusi, internet, 2019.

4.Nf3 Nd7 5.c4 e5 6.cd5 Bb4 7.Qa4 =.

4.f4 Nd7 =.

4.c4 e5

5.a3 Be6 6.Qc2 (6.Nf3 Nd7=) 6...Bd6 7.d3 (7.cd5 cd5 8.Qc7 Bc7=) 7...Nd7 8.Be2 Ngf6 9.Nf3 0–0 10.c5 Be7 11.Nbd2 h6 (11...b6 12.0–0=) 12.h3 (12.Qc3 d4 13.ed4 Nd5=) 12...a5 13.0–0 a4 (13...Rfd8 14.d4 e4 15.Ne5=) 14.Rfc1 (14.Rad1 Rfe8+=) 14...Nh7 (14...Ra7 15.Qc3 d4 16.ed4+/–) 15.e4 (15.Rab1 Ng5=) 15...d4= 16.Kh1 (16.Rab1 Ng5=) 16...f5 (16...Ng5 17.Re1=) 17.Rg1 f4 18.Raf1 Ndf6 19.Nc4 Bc4 20.Qc4+/– Kh8? 21.Nh4+– Ng5 22.Ng6 Kh7 23.Nf8 Rf8 24.Qc2 Qc8 25.g4 f3+/– 26.Bd1 Nh3 27.Rg3 Ng5 28.Bc1 Ng4 29.Bg5 Bg5 30.Rf3?? Rf3 31.Bf3 Nf6 32.Bg2 Qg4= 33.Kg1 Bf4 34.Re1+= Qh4 35.Qe2 Ng4 36.Qc2? Qh2 37.Kf1= Qh4 38.Re2 Qf6 39.Ke1+/– g5 40.Bh3 Nh2 41.Bf5 Kg7 42.Qa4 Nf3 43.Kd1 Qf7 44.Bg4 Nh2 45.Bf5?? Nf3+/– 46.b5 Ng1 47.Rb2 Qh5= 48.Kc2 Qe2 49.Kb1 Qd3 50.Qc2 Qc2 51.Kc2+/– h5 52.bc6 bc6 The passed pawn on a3 will quickly become a dangerous weapon 53.Rb7 Kf8 54.a4 h4 55.a5+– Be3 56.a6 d3 57.Kd3 Bc5 58.a7 Ba7 59.Ra7 h3 60.Rh7 Kg8 61.Rh3 Nh3 62.Bh3 Kf7 63.Kc4 Kg6 64.Bg4 Kf6 65.Kc5 Ke7 66.Kc6 Kf6 67.Kd6 (67...Kg7 68.Ke5+–) 1–0. Mess,Jan Peter – Vennemann,Horst, Schleswig Holstein–ch, 1991.

5.a3 Nf6 6.Nf3 Bg4 (6...e4 7.Nd4=) 7.cd5 (7.Be5 Qe5 8.Ne5 Bd1 9.Kd1 Bd6+=) 7...cd5 (better 7...Bd6!?+=) 8.Be5+– Bf3 9.Qa4 (9.Bc7 Bd1 10.Kd1 Kd7+–) 9...Qd7 10.Bb5 Nc6 11.gf3 Be7 12.Nc3 0–0 13.Bc6 bc6 14.Rc1 Rfc8 15.Bd4 (15.d4 Qf5+=) 15...Qf5 16.Ke2 (16.Ba7? Rc7 17.f4 Rca7 18.Qc6 Ra3–+) 16...Bd6 (16...a5 17.b5 c5 18.Bf6 Bf6 19.Qg4+=) 17.Qa6+– (17.Ba7? Qd7–+) 17...Nd7 (17...Rc7 18.b5 Qc8 19.Qc8 Rac8 20.Ra1+–) 18.Nb5! (18.Ba7? Rc7 19.Qd3 Qd3 20.Kd3 Rca7–+) 18...Bf8 (18...cb5 19.Qc8 Double attack (19.Rc8 Pinning; 19.Rc8 Deflection; 19.Qb7 Decoy; 19.Rc8 Clearance)) 19.Rc6+– Re8 20.Rc7 (20.Ba7 Ne5 21.Nd4 Qd7–/+; 20.Na7?! Nb8 21.Qd3 Nc6 22.Nc6 Qe6+=) 20...Nf6 (20...Ne5 21.Be5 Re5+–) 21.Bf6 Qf6 (21...Re6 22.Rc6 Qf6 23.Re6 Qe6 24.Qe6 fe6+–) 22.Qf6 gf6 23.Rg1 Bg7 (23...Kh8 24.Ra7 Ra7 25.Na7 Bd6+–) 24.Nd6 (24.Nd6 Re6 25.Nf5+–) 1–0. Lejel – Timesco, internet, 2019.

5.b5 Bd6 6.Qb3 Be6 (6...Nf6 7.bc6 dc4 8.Bc4 Nc6 9.Nc3+=) 7.a4 (7.Nf3 Nd7=) 7...Nd7 (7...Nf6 8.Nf3+=) 8.Na3 (8.d4 ed4 9.Bd4 Ngf6+= (worse is 9...Bh2 10.bc6 bc6 11.Bg7+/–)) 8...Ngf6–/+ 9.d4 (9.Nf3 0–0–/+) 9...ed4 10.ed4 (10.Bd4 c5 11.Bc3 Bh2–/+) 10...Ne4 (10...0–0 11.c5 Bh2 12.Ne2–/+) 11.Nf3 (11.Ne2!?–/+) 11...Qa5–+ 12.Ke2 Bg4 (12...0–0 13.bc6 bc6–+) 13.Rd1 (better is 13.Qc2!?–/+) 13...0–0–+ 14.Nc2 dc4 15.Qc4 (15.Qa2 cb5 16.Ne3 Rfe8–+) 15...Nb6 16.Qb3 Be6 (16...Be6 17.Qe3 Bc4 18.Rd3 Na4–+; 16...Qa4?! 17.Rd3 Rfe8 18.Ne3 Qb3 19.Rb3–+) 0–1. Hubert,Peter (2005) – Bartolomaeus,Christian (2180), Germany, 2006.

5.b5 Bd6 6.Nc3 Nf6 7.Rc1 (7.bc6!? dc4 8.Nb5 Qc6 9.Bc4=) 7...d4–/+ 8.Nce2 (8.Na4 c5–/+) 8...de3 (8...c5 9.f4 Nbd7 10.Qc2 de3 11.de3–/+) 9.de3+= Be6 (9...Nbd7 10.Nf3+=) 10.Ng3 (10.Nf3 Nbd7+=) 10...Nbd7 (10...Bb4 11.Bc3 Bc3 12.Rc3 cb5 13.Qb3–/+) 11.a3 (11.Nf3 Bb4 12.Nd2 Nc5–/+) 11...0–0 (11...Ba3 12.Ba3 Qa5 13.Qd2 Qa3 14.Nf3–/+) 12.Nf3 Ba3! 13.Qb3 (13.Ba3 Qa5 A double attack) 13...Qa5 (better is 13...Bb2!? 14.Qb2 Rfd8–+) 14.Bc3+= Nc5 15.Qa2 Bb4 (15...Qa4!? 16.Ra1 Bb4=) 16.Qa5+= Ba5 17.Ba5 Nb3 18.Rd1 (18.Bd2!? Nc1 19.Bc1 cb5 20.cb5+= (worse is 20.Ne5 bc4 21.Be2 Rfc8–/+)) 18...Na5= 19.Ne5 cb5 20.cb5 Rad8 (20...Rfc8 21.Bd3=) 21.Ra1+= (21.Ra1 b6 22.Nc6 Nc6 23.bc6=). Colo,V – Starace,R, 1986.

5.b5 Bd6 6.bc6 bc6 7.cd5 cd5 =.

5.b5 Nf6 6.d4 +=.

5.cd5 Bb4 6.f4 Bd6 7.Nf3 =.

5.cd5 cd5 6.Nf3 Bd6 7.Nc3 d4 8.ed4 +/–.

5.cd5 cd5 6.Nf3 f6 7.a3 (7.Nc3 Be6 8.Rc1 Qb6= (8...Bb4?? 9.Nb5 Qa5 10.Nc7 Kf7 11.Na8+–)) 7...Ne7 (7...Nc6 8.Nc3 e4 9.Nb5= (< 9.Nd5 Qd7–/+)) 8.Be2 Ng6 (8...Bg4 9.0–0=) 9.0–0 (9.Nc3 Be6+=) 9...Bd6 (9...e4 10.Nd4 Nc6+=) 10.d3 (10.Nc3 Qf7+=) 10...0–0 (10...e4 11.Nd4 Bh2 12.Kh1=) 11.Nbd2 (11.Nc3 Qf7=) 11...Be6 12.Rc1 Qf7 13.e4 (13.Nb3 Nd7=) 13...d4 (13...Nf4 14.d4=) 14.Qe1 (14.Nc4 Be7=) 14...a6 (14...Nf4 15.Nc4 Bc7 16.Qd1=+) 15.h3 (15.Nc4 Bc7=) 15...Nc6 (15...Nf4 16.Nh4=+) 16.Nh2 (16.Nc4 Be7=+) 16...Rac8 17.Bg4 (17.Bh5 f5=+) 17...Nce7 (17...Nf4 18.Nc4 Be7 19.Qd2=+) 18.Be6 (18.Nc4 Bc7 19.Be6 Qe6=+) 18...Qe6=+ 19.Ng4 (19.Nc4 Nf4 20.Qd2 b5 21.Nd6 Qd6 22.Rc8 Rc8=+) 19…Nf4–/+ (20.Rc8 Rc8–/+) 0–1. vello2 – shooin, Live Game Caissa's Web, 2005.

5.Nf3 Bb4?? 6.Be5 Qd8 7.Bg7 +–.

5.Nf3 Bb4?? 6.Ne5?! Nf6 =.

5.Nf3 e4 6.Nd4 Bb4 7.Nc6 Bf8 8.Nb8 +/–.

5.Nf3 e4 6.Nd4 dc4 7.Bc4 Nf6 =.

4.Nf3 Bg4

5.a3 Nd7 6.c4 e5 7.cd5 e4 (7...cd5 8.Nc3 Ngf6 9.Rc1+=) 8.h3 (8.Qc2 ef3 9.Qe4 Ne7 10.Qg4 fg2 11.Qg2 cd5 12.Nc3+– (12.Bg7?? Qc1 13.Ke2 Rg8–+)) 8...ef3 (better 8...Bf3!? 9.gf3 cd5+–) 9.hg4+– Ne5 10.gf3 0–0–0 (10...cd5 11.Rh5 f6 12.f4+–) 11.Nc3 Nf6 12.Rc1 (better 12.f4!? Ng6 13.Nb5 cb5+–) 12...Nd5 13.Nd5 Rd5 14.Be5 Qe5 15.Qa4 Kb8 16.Qc2 Be7 (16...Qf6 17.f4+–) 17.Be2 (17.f4 Qf6 18.g5+–) 17...Rhd8? (17...Qf6 18.Bc4 Rg5 19.Rh7 Rh7 20.Qh7 Qf3 21.Qg8 Kc7 22.d4+–) 18.Rd1 (18.d4 Qf6 19.Rh7 Re8+–) 18...a5 (18...h6 19.d4 Qf6 20.Bc4+–) 19.Kf1 (19.Bc4 R5d7 A) 20.Bf7?! ab4 21.a4 Qf6+–; B) 20.Qh7 Qc3 21.Be2 Rd2 22.Rd2 Rd2–/+ (22...Qd2?! 23.Kf1=); C) 20.f4+–) 19...ab4 20.ab4 Bb4 (20...h6!?+–) 21.d4+– (21.Rh7?! Rd2 22.Rd2 Rd2=) 21...Qc7 22.Qb1 (22.Rb1 c5 23.Bc4 cd4 24.Rb4 de3+–) 22...Qa5 23.Rh7 c5 24.Rg7 R5d7 (24...cd4 25.Qb3+–) 25.Qf5 (25.dc5 Qc5 26.Rh7 Rd1 27.Bd1 Rd2+–) 25...Ka8? (25...cd4 26.Qa5 Ba5 27.Rd4 Rd4 28.ed4+–) 26.Qf6 (better 26.Rf7!? Rf7 27.Qf7 cd4 28.ed4 Bc3+–) 26...cd4 27.ed4 (27.Rd4?! Bc3 28.Ra4 Qa4 (28...Bf6? 29.Ra5 Kb8 30.Rh7+–) 29.Qc3 Rd2+=) 27...Bd2 (better 27...Bc3 28.Rf7 Bd4+–) 28.d5?? (better 28.Rf7 Rd4 29.f4 Rf4 30.Qd8 Qd8 31.Rf4+–) 28...Qc7?? (better 28...Bc3 29.Qg5 Bg7 30.Qg7 Qc7=+ (30...Rd5?? 31.Ra1+–)) 29.Ra1 (better 29.Rd2 Qh2 30.Ke1+–) 29...Kb8 30.Ra8?? (better 30.Qd4 Ba5 31.Rh7+–) 30...Ka8–+ 31.Qa1 (31.Qa1 Kb8 32.Rh7–+) 1–0. FeegLood (2290) – ThingsChange (2330), lichess.org, 2015.

5.a3 Nd7 6.c4 e6 7.Nc3 Ngf6 8.Rc1 a6 9.h3 Bh5 (9...Bf3 10.Qf3 Ne5 11.Qf4 dc4 12.Bc4=) 10.cd5+= ed5 11.g4 Bg6 12.g5 Ne4 13.Nd5 Qd6 (better 13...Qd8!? 14.Nf4 Ng5+=) 14.Nf4+– Be7 (14...Qe7 15.h4+–) 15.Bc4 (better 15.h4!? a5 16.Rc4+–) 15...Ng5 16.Ng5 Bg5 17.Ng6 0–0–0?? (17...Qg6 18.Rg1 Qh6 19.Qg4+–) 18.Ne7! Be7 (18...Qe7 19.Bg7 Combination; 18...Be7 19.Bg7 Combination) 19.Ba6?? (better 19.Bg7 Rhg8 20.Bc3+–) 19...ba6–/+ 20.Be5?? (better 20.Bg7 Rhg8 21.Bd4–/+) 20...Ne5–+ 21.Rc6 (21.0–0 Qg6 22.Kh1 Qe4 23.f3–+) 21...Qc6 22.Qg4 (22.Qg4 Ng4 23.0–0 Qf3 24.Rc1 Kb7 25.hg4 Rd2 26.Rc7 Kc7 27.e4 Qf2 28.Kh1 Qe1). FeegLood (2290) – ThingsChange (2325), lichess.org, 2015.

5.c4 e6 6.h3 Bh5 7.c5 (7.a3 Nd7=) 7...Ne7 (7...Nd7 8.d4=) 8.Be2 Nd7 9.0–0 (9.d4 Bf3 10.Bf3 Nf5=) 9...Bg6 (9...e5 10.Nc3=) 10.d4 (10.Nh4 Nf5 11.Ng6 hg6+=) 10...Nf5= 11.Nbd2 (11.Nc3 Be7=) 11...Be7 12.Bd3 (12.a4 0–0=) 12...Nh6 (better is 12...Ne3 13.fe3 Bd3–/+) 13.Bg6 (13.Nb3 Bd3 14.Qd3 Nf5=) 13...fg6 (13...hg6 14.Qe2=) 14.Ne5 (14.e4!?+=) 14...Ne5= 15.de5 0–0 (15...b6 16.Nb3=) 16.f4 (16.e4 b6=) 16...Nf5 (16...b6 17.Bd4=) 17.Qf3 Rf7 (17...Bh4 18.Qg4=) 18.g4 (18.e4 Nh6+=) 18...Nh4= 19.Qg3 g5 (19...Raf8 20.Nb3=) 20.f5 (better is 20.Nb3!?=) 20...ef5 (21.e4 de4 (< 21...fe4 22.Rf7 Bc5 23.bc5 Qf7 24.Rf1+=) 22.gf5 a5=+; 20...a5 21.a3 ef5 22.Qh2–/+) 0–1. wood – shooin, Live Game Caissa's Web, 2005.

5.c4 Nf6 6.a3 =.

5.Be2 Nd7 6.0–0 Ngf6 7.d4 e6 8.a3 Bd6 9.Nbd2 Bf5 10.c4 Ne4 11.c5 Be7 12.Ne4 Be4 13.h3 g5 14.Rc1 h5 15.Ne5 h4 16.f3 Bf5 (16...Bh7 17.a4+=) 17.e4 Bg6? (better is 17...Bh7!? 18.ed5 ed5+/–) 18.Ng6+– fg6 19.Bd3 0–0–0 20.ed5 ed5 21.Bg6 Qf4 22.Qd3 Rhg8 23.b5 Nf8?? (23...Qf6 24.Bf5 Rde8+–) 24.Bf5 Kc7 (24...Kb8 25.bc6 Qc7 26.cb7 Kb7+–) 25.bc6 bc6 (25...Rg7 26.cb7 Bf6+–) 26.Bc3 Nd7 27.Bd2 Qg3 28.Qa6 Bc5 (28...Qf2 29.Rf2 Bc5 30.dc5 Nc5 31.Rc5 Rg6 32.Bg6 Kd7 33.Qb7 Kd6 34.Re2 Kc5 35.Qb4) 29.dc5 Nc5 (29...Qg2 30.Kg2 Nc5 31.Rc5 Rg6 32.Qa7 Kd6 33.Rc6 Ke5 34.Re1 Kf5 35.Qe7 Rc6 36.Qg5) 30.Rc5 Rb8 (30...Rg6 31.Qa7 Kd6 32.Rc6 Ke5 33.Bg6 Qf2 34.Kf2 d4 35.Re1 Kd5 36.Qc5) 31.Qc6 Kd8 32.Qd7 1–0. Janek – Bonnie, internet, 2016.

5.Be2 Nd7 6.c4 Ngf6 =.

5.Be2 Nd7 6.d3 e5=+ 7.a3 Ngf6 (7...a5 8.ba5 Qa5 9.Qd2=+) 8.Nbd2 (8.c4 dc4 9.dc4 a5=+) 8...Bd6 (8...a5 9.Bc3=+) 9.c4= 0–0 10.c5 (10.h3 Bf3 11.Bf3 a5=) 10...Be7=+ 11.0–0 (11.h3 Bh5=) 11...a5 (11...b6 12.Qc2=+) 12.h3 Bh5 13.e4 (13.Qc2 ab4 14.ab4 Rfb8=) 13...h6 (13...Bg6 14.Qc2=) 14.Re1 Bg6 (14...Bf3 15.Nf3 ab4 16.ab4 de4 17.de4=+) 15.Nh4 (15.d4 de4 16.Ne5 Ne5 17.de5 Nd5=) 15...Bh7 16.Nf5 (16.Nhf3!?=) 16...Bf5–/+ 17.ef5 ab4 18.ab4 b6 19.cb6 (19.d4 A) < 19...bc5 20.de5 (< 20.dc5 Qb7=+) 20...Ra1 21.Qa1+=; B) 19...ed4 20.Bd3 Rae8–/+) 19...Qb6 20.Ra8 (20.Rb1 Bb4 21.Bc3 c5–+ (< 21...Bc3 22.Rb6 Nb6 23.Qc2=+)) 20...Ra8 21.Bg4 Bd6 22.Bc3 d4 23.Nc4–/+ Qc7 24.Nd6 Qd6–/+ 25.Bd2 Nd5 26.Qc1 Nb4–+ 27.Qc4 Nd5 28.Rc1 Rc8 29.Bf3 N7b6 30.Qc5 Qc5 31.Rc5 –/+. touchdown – RageofKlugman, ChessWorld.net, 2007.

5.Be2 Bf3

6.Bf3 e5 7.0–0 Bb4 8.d3 Ne7 (8...Nf6 9.c4=+) 9.c4= 0–0 10.Qb3 Qd6 (10...Na6 11.Nc3=) 11.cd5 cd5 12.a3 Bc5 (12...Ba5!?=) 13.Nc3+= d5 becomes the focus of attention (worse 13.Qb7 Nd7 14.Qb3 Rab8=+) 13...Nbc6 14.Nd5 (14.Qb7?? Rab8 15.Qa6 Rb2–+; 14.Bd5?! Nd5 15.Qd5 Qd5 16.Nd5 Rfd8=) 14...Nd5 15.Bd5 Na5 16.Qa2 Rad8 17.Be4 Kh8 18.Bc3 (18.Rfd1 f5 19.Bf3 Bb6+=) 18...Nc6 (18...f5 19.Ba5 b6 20.Bc3 fe4 21.de4+–) 19.g4 (19.Qb2 Rd7+=) 19...Ne7 (19...g6 20.Qb2 Rd7 21.Bc6 Qc6 22.Rfc1+=) 20.Qb2 (20.Rfd1+–) 20...b6? (better 20...f6!?+=) 21.Be5+– Qh6 22.Bf4 (22.Kh1 f6 23.Bg3 Qg5+–) 22...Qh4 (22...Qe6 23.h3+–) 23.Qe2 f5 24.gf5 Nf5 25.Bg3 Ng3 (25...Qe7 26.a4+–) 26.hg3+– Qh3 27.d4 Bd6 28.Bg2 Qh6 (28...Qd7 29.Bf3+–) 29.e4 Rf7 (29...Be7 30.Rfd1+–) 30.e5 Be7 31.Qc4 Rf5 (better 31...Rff8+–) 32.Qc7 Qg5 (32...Rf7 33.d5 Rdf8 34.e6+–) 33.Rad1 Rdf8 (33...Rf7 34.d5 Rdf8 35.e6+–) 34.Qa7 R5f7 (34...Bd8 35.Qd7+–) 35.Qb6 Ba3 36.Rd3 Bc1 (36...Be7+–) 37.Bd5 Rf2 (37...Rf5 38.Qc5 Rd8 39.Bg2+–) 38.Rf2 Be3 39.Re3! Qe3 (39...Qe3 40.Qb2 Combination) 40.Bf3 Qe1 (40...g5 41.g4 Qd3+–) 41.Kg2 1–0. DEFFM – GuestKJKR, freechess.org, 2018.

6.Bf3 e5 7.0–0 e4 8.Bh5 (8.Be2 Nd7+=) 8...Nf6 (8...Nd7!?=) 9.Bf6+= gf6 10.Qg4 Nd7 (10...Bb4 11.Qe6 Be7 12.Qf7 Kd8 13.Nc3+–) 11.Qe6 Be7 (11...Kd8!? 12.Qf7 Bb4+=) 12.Qf7+– Kd8 13.b5! Ne5 (13...cb5 14.Nc3 Double attack (14.Qd5 Deflection; 14.Nc3 Decoy)) 14.Qg7 Kd7 15.Bg4 (15.Nc3+–) 15...Ng4 (better 15...Kd6!? 16.f4 ef3 17.Bf3 Rag8+–) 16.Qg4+– Kd8 17.bc6 Qc6 (17...bc6 18.f3 Qd7 19.Qd7 Kd7 20.fe4+–) 18.Nc3 Rf8 (18...h5 19.Qf5 Qd7 20.Qd5 Qd5 21.Nd5+–) 19.Qf5 (19.Qf5 Qd7 20.Qh7+–) 1–0. DEFFM – GuestKJKR, freechess.org, 2018.

6.Bf3 e5 7.a3 e4 8.Be2 f5 (8...Nd7 9.c4=) 9.c4 Nf6 10.cd5 cd5 11.Nc3 Nbd7 (11...Nc6 12.Nb5 Qd7 13.Bf6 gf6 14.d4+=) 12.Rc1 Qb6 13.0–0 Rc8? (13...a5 14.Nb5 Kf7 15.Qa4+/–) 14.d3 (14.Ne4 Rc1 15.Nf6 Nf6 16.Qc1 Qc6+–) 14...Bd6 (14...Rc7!?+/–) 15.de4+– de4 (15...fe4 16.Qb3 Qd8 17.Nd5 Kf8 18.Nf6 Nf6+–) 16.Nd5?? (better is 16.Ne4 Ke7 17.Bd4 (17.Qd6?! Qd6 18.Nd6 Kd6+–) 17...Rc1 18.Qc1+–) 16...Nd5?? (better is 16...Rc1 17.Nf6 Nf6 18.Qc1 Qc7+=) 17.Qd5 (better is 17.Rc8 Ke7 18.Rh8+–) 17...Rc1 18.Rc1 (18.Bc1?! Qc7+/–) 18...Nf6 19.Bf6 gf6 20.Rc8 (20.Rc8 Ke7 21.Rh8+–; 20.Qe6 Kf8 21.Qf6 Ke8 22.Rc8 Kd7 23.Qf5 Ke7 24.Qg5 Ke6 25.Bc4 Kd7 26.Qf5 Ke7 27.Qe6) 1–0. Fournier,Frederic (1620) – floppymore (1655), Active, 2008.

6.Bf3 e5 7.a3 Nf6+= 8.0–0 (8.c4 dc4 9.Qc2 Nbd7+=) 8...Bd6= 9.Be2 (9.g3 0–0=) 9...Nbd7 10.d3 e4 (10...0–0 11.c4=) 11.g3 (11.h3 0–0=) 11...Be5 (11...h5 12.de4 de4 13.Nd2–/+) 12.Be5 (12.d4 Bd6=) 12...Qe5= 13.Nd2 h5 14.f4 (14.c4 h4 15.d4 Qg5+=) 14...Qf5 (14...ef3 15.Rf3 Qe7 16.d4–/+) 15.h4 (better is 15.de4 Ne4 16.Ne4 Qe4 17.Qd4= (17.Bh5? Qh7–+)) 15...Qh3–+ 16.Qe1 Qe6 (16...Rh6!? 17.f5 g5 18.hg5 h4 19.gh6 hg3–+) 17.Kg2 (17.de4 Ne4 18.Ne4 de4=) 17...ed3 18.Bd3 (18.cd3 0–0–0 (worse is 18...Qe3 19.Bh5 Qe1 20.Rfe1 Kf8 21.Bf3+=) 19.Bf3 Kb8+=) 18...Ng4 19.e4 0–0–0 20.Rf3 Rde8 (better is 20...Rhe8 21.Qg1 de4 22.Ne4 Kb8–/+) 21.c4?? (better is 21.Qg1 de4 22.Ne4+=) 21...d4 (better is 21...de4 22.Ne4 f5–+) 22.Nf1?? (better is 22.Nb3 Ne3 23.Kg1+/–) 22...c5 (22...Kb8 23.Nd2 Ne3 24.Re3 de3 25.Qe3–/+) 23.Ra2 b6 24.Re2 (24.Nd2 Rd8+=) 24...Re7 (24...f6 25.Nd2–/+) 25.Qb1 (25.e5!?+=) 25...f6–/+ 26.e5 fe5 27.bc5 bc5 28.Be4 Qa6 29.Rb2 Nb6 30.Rbb3? Rh6 31.Rb5= Rc7 32.Bg6 Qb7 33.Be4= Qa6 34.Qd3 Rf6 35.Kg1 ef4 36.Bf5 Kd8 37.Qe4? Qb7 38.Qb7–/+ Rb7 39.Nh2?? fg3 (39...fg3 40.Ng4 hg4 41.Bg4 Rf3 42.Bf3 Rc7–+) 0–1. Tagirov,Kajum K (1920) – Galiakhmedov,Albert (1885), Memorial Siamidi, 2009.

6.Bf3 e5 7.c4 e4 8.Be2 Nf6 9.cd5 Nbd7 10.dc6 bc6 +/–.

6.Bf3 Nf6 7.c4 +=.

3.e3 Qd6

4.a3 b5 5.Nf3 h5 (5...Nd7 6.Bc3=) 6.Be2 (6.Be5 Qd7+=) 6...Rh6 (6...Nd7 7.a4 ba4 8.Ra4+=) 7.Be5+– Qe6 (7...Qg6 8.a4 ba4 9.Ra4 Qg2 10.Rg1+–) 8.d4 (8.a4 Nd7 9.Bf4 Rg6+–) 8...f6 9.Bg3 a6 (9...g5 10.a4 ba4 11.h3+–) 10.Bd3 (better 10.a4 Qd7 11.Nh4+–) 10...Ra7?? (10...g5!?+–) 11.Nh4 (11.Bb8 Ra8 12.Bc7 Qf7+–) 11...Rb7? (11...Nd7 12.Bg6 Kd8 13.Bf4+–) 12.Bg6 (better 12.Bf5 Qf5 13.Nf5 Bf5 14.Nc3+–) 12...Kd7?? (12...Kd8 13.Bf4 Rh8+–) 13.Bf5 (13.Bh5?! Kd8 14.Nd2 Nd7+–) 13...Qf5 (13...Kd8 14.Be6 Be6 15.Qd3+–) 14.Nf5 Rg6 (14...Rh8+–) 15.Qh5 Rg3 16.hg3 Rb6 17.Qg4 (better 17.Qf7!? Kc7 18.Ng7 Bg7 19.Qg8 Nd7 20.Qg7 e5+–) 17...e5 (17...Kc7 18.Qg6 Bf5 19.Qf5+–) 18.Ng7 (better 18.Rh8 Kc7 19.Rg8 Bf5 20.Qf5 Nd7 21.de5 Rb8+–) 18...Kd6 19.Nf5 (better 19.Ne8 Ke7 20.Qc8 Bh6+–) 19...Kc7 (19...Bf5 20.Qf5 Nd7 21.Rh8+–) 20.Rh7 (better 20.Qg8 Bf5 21.de5 Nd7+–) 20...Kd8 21.Qg8 (21.Qg8 Nd7 22.Nd6+–) 1–0. GuestHMFH – GuestMMSK, freechess.org, 2016.

4.a3 Bd7 5.Nf3 f6 6.c4 e5 7.c5 Qc7 8.Be2 b6 9.d4 e4 10.Nfd2 Nh6 11.0–0 Be7 12.Nb3 a5 (12...0–0 13.f3 ef3 14.Bf3=) 13.N1d2 (13.cb6 Qb6 14.ba5 Qc7+=) 13...0–0 14.cb6 Qb6 15.ba5 Qc7 16.Qc1 Bg4 17.Bg4 Ng4 18.g3 g5 (18...f5 19.Qc3=) 19.Bc3 h5 (19...f5 20.Bb4+=) 20.Bb4 h4 21.h3 (21.Qe1 Na6+/–) 21...Bb4 (21...Ne3!? 22.Be7 Nf1 23.Bf8 Nd2 24.Qd2 Kf8 25.gh4 gh4=) 22.ab4+/– Ne3 23.Nc5?? (better is 23.Re1 Nf5 24.g4+=) 23...Qd6?? (better is 23...Nf1 24.Qf1 hg3–/+) 24.Nde4+– (24.fe3?! Qg3 25.Kh1 Qh3 26.Kg1 Qe3 27.Rf2 Qg3 28.Rg2 Qe3 29.Kh1 Na6=) 24...de4 25.Qe3 (25.fe3?! Qg3 26.Kh1 Qh3 27.Kg1 Kg7=) 25...Qe7 (25...hg3 26.fg3 Nd7 27.Ne4 Qb4 28.Ng5+–) 26.Qe4 Qe4 27.Ne4 Nd7 28.Rfc1 Ra6 29.Nc5 Nc5 30.Rc5 (worse is 30.bc5 hg3 31.fg3 Rfa8+–) 30...Rd8 31.Rc4 hg3 32.fg3 Rd5 33.g4 Kg7 34.Kf2 f5 35.gf5 Rf5 36.Kg3 Kg6 37.Rac1 Rf6 38.Rc5 Kh5 (38...Re6+–) 39.h4 Rf4 (39...Kg6 40.Rg5 Kf7+–) 40.Rg5 Kh6 41.Kf4 (41.Kf4 c5 42.dc5 Rf6 43.Kg4+–) 1–0. Hal1958 – Gilt, playchess.de, 2005.

4.a3 Nd7 5.c4 Ne5 6.cd5+= cd5 7.Be5 Qe5 8.Bb5 Bd7 (8...Kd8 9.Nc3+=) 9.Bd7 Kd7 10.Qa4 (better 10.Nc3 e6 11.Nf3+=) 10...Kc8? (10...Kd8 11.Nc3 e6 12.Nf3+=) 11.Nc3 (better 11.d4 Qd6 12.Qe8 Qd8 13.Qf7+–) 11...e6?? (better 11...Nf6+–) 12.Qe8+– Kc7 13.Qa8 g6 (13...Be7+–) 14.Nb5 Kb6 15.Rc1 Qb2 (15...Bc5 16.Qa7 Kc6 17.Rc5 Kd7 18.Qb7 Qc7 19.Rc7 Kd8 20.Qc8) 16.Qa7 Kb5 17.Qa5 1–0. michaelbuss (2830) – whitepaperbag, ChessWorld.net, 2014.

4.a3 Nf6 5.Nf3 Bg4 6.h3 Bh5 7.g4 Bg6 8.g5 Ne4? (better is 8...Nfd7=) 9.d3+– Nf2 10.Kf2 Nd7 11.h4 0–0–0 (11...h6 12.Bh3+–) 12.h5 Bf5 13.Nd4 e6 (13...Be6 14.Ne6 Qe6 15.Nd2+–) 14.Qf3 Be7 15.Qf4 g6 (15...Rhg8 16.Nd2+–) 16.Qd6 Bd6 17.Nf5 Be5 (17...gf5 18.Bh8 Rh8+–) 18.d4 Bc7 (18...Bf6 19.Nd6 Kc7 20.Nf7+–) 19.Nh6 Rhf8 (19...Rdf8 20.Nd2+–) 20.Nd2 f6 (20...e5 21.Ng4 e4 22.hg6 hg6 23.Be2+–) 21.hg6 hg6 22.gf6 Rf6 23.Kg2 Rh8 (23...Rdf8 24.Ng4 Rf5 25.Be2+–) 24.Bd3 g5 25.Ng4 Rh1 (25...Rff8 26.Raf1+–) 26.Rh1 Rf8 27.Rh6 a6 (27...Nb6 28.Re6 Na4 29.Bc1+–) 28.Re6 Nb6 29.Bc1 Rh8 (29...Na4 30.Nf3+–) 30.Nf3 Kd7 (30...Na4 31.Ng5 Nc3 32.e4+–) 31.Bf5 Kd8 32.Ng5 Rf8 33.e4 Re8 34.Nf7 Kd7 35.Nf6 1–0. Janek – greyowl, internet, 2016.

4.Nf3 Qb4 5.Bc3 Qg4 6.Be2 =+.

4.Nf3 e5 5.Nc3 (5.Ne5!? Qb4 6.Ba3+=) 5...Bg4 (5...Qb4 6.Rb1 Qd6 7.Ne2–/+) 6.h3 Bf3 7.Qf3 e4 (7...Qb4!? 8.Rb1 Qc5=+) 8.Qg4= Nd7 9.Ne4? (Better is 9.a3=) 9...Nh6?? (Better is 9...de4 10.Qe4 Ne7–/+) 10.Nd6+– Bd6 11.Qg7 (11...Rg8 12.Qh6+–) 1–0. Aliethah – NimzomanBravo, Live Game Caissa's Web, 2004.

4.a3 a5

5.b5 Nf6 6.Nf3 Bg4 7.h3 Bf3 8.Qf3 e6 (8...e5 9.Be2=) 9.Be2 (9.Bf6!? gf6 10.Qf6+/–) 9...Be7= 10.0–0 Nbd7 11.Nc3 0–0 12.bc6 bc6 13.a4 Rfb8 14.Ba3 Rb4 (better is 14...c5!?=) 15.Bb4 ab4 16.Na2 (better is 16.Nb1+=) 16...Ra4 17.Rfb1 c5 18.c3 (better is 18.Bb5!? Ra3 19.Qe2=) 18...Ne4–/+ 19.Qf4? (19.Bd3 Ne5 20.Qe2 Nd3 21.Qd3–+) 19...Qf4–+ 20.ef4 Bf6?? (better is 20...Nd2 21.Nb4 Nb1 22.Ra4 Nc3 23.Ra8 Bf8–+) 21.Bb5= Ra7 22.Bd7 Rd7+= 23.Rd1? g6 24.f3 Ng3 25.Kf2 Nf5 26.Rab1 bc3 27.Nc3= Bd4 28.Ke1 Nh4 29.Kf1 Nf5 30.Ne2 Ra7 31.Nd4 Nd4 32.Ra1 Rc7 33.Rdc1 Nb3 34.Rab1?? Nc1 35.Rc1 Kg7 36.Ke2 Kf6 37.d3 Kf5 38.g3 h5 39.h4 Kf6 40.Ke3 Ke7 41.Rc2 Kd6 42.Rc1 Ra7 43.Rc2 Ra3 44.Rc1? c4 45.Rd1 Kc5 46.Ke2 cd3 47.Rd3 Rd3 48.Kd3 d4 49.g4 Kd5 50.Kd2 Kc4 51.Kc2 d3 52.Kd2 Kd4 53.f5 ef5 54.g5 f4 55.Ke1 Ke3 56.Kf1 Kf3 57.Ke1 Kg2 58.Kd2–+ f3 59.Kd3 f2 60.Kd4 f1Q 61.Kd5 Qf5 62.Kd6 Kf3 63.Kc6 Qd5! 64.Kd5 Kg4 65.Ke5 Kh4 66.Kf6 Kg4 67.Kf7 Kg5 68.Kg7 h4 69.Kf7 h3 70.Ke6 h2 71.Ke7 h1Q 72.Ke6 Qe4 73.Kd6 Kf6 74.Kc5 Ke6 75.Kb5 Kd6 76.Kb6 Qb4 77.Ka7 Kc7 78.Ka6 Qb6 0–1. Fournier,Frederic (1680) – conbron (1725), Active, 2007.

5.Nf3 Nd7 =.

5.f4 ab4 6.Be5 Qc5?? 7.ab4+– Ra1 8.bc5 Ra8 9.c4 f6 10.Bb8 Rb8 11.cd5 cd5 12.Qa4 Bd7 13.Bb5 Rd8 14.Nf3 Bb5 15.Qb5 Rd7 16.Nc3 e6 17.f5 (17...Ke7 18.Nd4+–) 1–0. Laurent,Claude – Nielsen,Jens Hartung, corr ICCF, 1993.

4.a3 e5

5.c4 Nf6 6.cd5 cd5 7.Nf3 Nbd7 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6 7.cd5 cd5).

5.Nf3 Nd7 6.Be2 =.

3.e3 Nd7

4.a3 Ngf6 5.c4 e5 6.Nc3 g6 7.Nf3 Bg7 8.cd5 cd5 9.Nd5?? (better is 9.Nb5 0–0 10.Ne5+=) 9...Nd5–+ 10.Bc4 Ne7 (10...N5b6 11.Bb3–+) 11.Qb3 0–0 12.Ng5 Qe8 13.h4 (13.f4 Nc6–+) 13...h6 14.0–0–0 (14.Nf3 e4 15.Bg7 Kg7 (15...ef3?! 16.Bh6 fg2 17.Rg1=+) 16.Qc3 Nf6–+) 14...Nb6 (better is 14...hg5 15.hg5 Nb6 16.d3–+) 15.Bd3 (15.Bf7 Rf7 16.Nf7 Qf7 17.Qf7 Kf7–+) 15...e4 (better is 15...hg5 16.hg5 Be6 17.Qc2–+) 16.Be4? (16.Bg7 Kg7 (16...ed3?! 17.Bh6 Bg4 18.f3 Qc6 19.Kb1 Qc2 20.Qc2 dc2 21.Kc2 Rfc8 22.Kb1–/+; 16...hg5?! 17.Bf8 ed3 18.Be7 Qe7 19.hg5=) 17.Ne4 Bg4–+) 16...Bb2 17.Kb2 (17.Qb2 hg5 18.hg5 f6 19.gf6 Nc6 20.f7 Kf7 21.Rh7 Ke6–+) 17...Nc6 (17...hg5 18.hg5 Be6 19.Qd3–+) 18.Qc2 (18.Bg6 hg5 19.hg5 Qe5 20.d4 Qg5 21.Bh7 Kg7–+) 18...Bd7 (better is 18...hg5!? 19.hg5 a5 20.b5–+) 19.Nf3 Kg7 (better is 19...Rc8!? 20.Qd3–+) 20.h5 g5 21.g4 (21.Rc1 Rc8 22.Kb1 g4 23.Qb2 f6–+) 21...Ne5 22.Nd4? (22.Ne5 Rc8 23.Nc6 Bc6 (< 23...bc6 24.Ka1–+) 24.Qc3 Kg8 25.Bc6 Rc6–+ (25...bc6?! 26.Qf6–+; 25...Qc6?! 26.Qc6 Rc6 27.Rhg1–+)) 22...Nbc4 (better is 22...Ba4!? 23.Qb1 Bd1 24.Rd1 Ng4 25.Bb7–+) 23.Ka2 Ba4 24.Nf5 Kh8 25.Qc3 Bd1 26.d3 (26.Rd1 Qe6 27.Ka1 Qf6–+) 26...Qe6 (better is 26...Na3!? 27.f4 f6 28.Qa3–+) 27.dc4 Qc4?? (better is 27...Bg4 28.Nh6 Be2–+ (< 28...Qh6 29.Qe5 f6 30.Qg3–+)) 28.Qc4+/– Nc4 29.Rd1 Rad8 30.Rc1 Nd2? (better is 30...Nd6 31.Nd6 Rd6=) 31.Rc7?? (better is 31.Bb7 Rd7 32.Bc6+–) 31...Ne4–+ 32.Rb7 Nf2 (33.Ra7 Ng4–+) 0–1. slavisa11 – Reality, Live Game Caissa's Web, 2004.

4.b5 Ngf6 5.Bf6 Nf6=+ 6.Nf3 Qc7 7.bc6 bc6 8.d4 e6 9.Bd3 Bd6 10.0–0 0–0=+ 11.Nbd2 e5 12.de5= Be5 13.Ne5 Qe5 14.c4 Bg4 15.Nf3 Qh5 16.Be2 dc4 17.Rc1 Rfd8=+ 18.Qa4 Nd7 19.h3 Bf3 20.Bf3 Qh6 21.Qc4 Ne5 22.Qe4 Nf3 23.Qf3 Qe6 24.Qc6 Qa2= 25.Ra1 Qd5 26.Qd5 Rd5 27.Ra6 Kf8 28.Rfa1 Rd7 29.Kh2 Ke7 30.Kg3 Rb7 31.e4 Rc7 32.f4 Rb7 33.e5 Rc7 34.f5 Rb7 35.Kf4 Rb4 36.Kg5 Rb7 37.R1a4 Kf8 38.g4 Rb5 39.Kf4+/– Re8 40.Re4 White intends e6 40...Re7+= 41.g5 Rb6 42.Rb6 ab6 43.Rb4 Rb7 44.e6 fe6 45.fe6 Ke7 46.Ke5 b5 47.Rf4 Ke8 48.Kd6 Rb6 49.Kd5 b4 50.Kc5 Re6= ½–½. Hohlstein,Walter (1815) – Milde,Lars (1815), TT–05.46 TSC, 2003.

4.Nc3 Ngf6 5.Nf3 e5 6.a3 Bd6 7.Be2 0–0 8.0–0 Re8 9.h3 Qc7 10.d3 b5 11.a4 (11.e4 a5=+) 11...ba4 (11...Bb4 12.ab5 Bc3 13.Bc3 cb5 14.Ba5–/+) 12.Ra4 (12.b5 Rb8 13.bc6 Qc6 14.Na4 a6=+) 12...Nb6 13.Ra2 Bb4 14.Na4 Nbd7 15.Bc3 (15.d4 ed4 16.Qd4 Re4–/+) 15...Bc3 16.Nc3 d4 17.ed4 ed4 18.Na4 c5 19.c3 dc3 20.Nc3 Bb7 21.Qd2 (21.d4 a5–/+) 21...Nd5 22.Rb1 Nc3 23.Qc3 Bd5 24.Rab2 a5–+ 25.Nh4 Qd8 26.Nf5 Qg5 27.Bg4 h5 28.Qg7 Qg7 29.Ng7 hg4 30.Ne8 Re8 31.hg4 a4 32.Ra1 Bb3 33.Kf1 Rd8 34.Re2 Nf8 35.Re3 Ne6 36.g5 Nf4 37.g3 Nd3 38.Re7 c4 39.Rc7 Re8 40.Kg1 Kg7 41.f4 Re1 42.Re1 Ne1 43.Kf2 Nc2 44.g6 Kg6 45.Rc6 Kg7 46.Rc5 a3 47.Rg5 (47...Kf6 48.g4–+; 47.Ke2 a2 48.Ra5 a1Q 49.Ra1 Na1–+) 0–1. jaskier (2150) – JurgBehrmann (1825), internet, 2006.

4.c4 a6 5.Nf3 Ngf6 6.a4 (6.c5 e6=) 6...e6 7.b5 ab5 8.ab5 Ra1 9.Ba1 Qa5 10.Nc3 dc4 11.Bc4 Bd6 12.0–0 0–0 13.Qb3 Nc5 14.Qc2 e5 15.d4 ed4 16.Nd4 Re8 17.Bb2 Qc7 18.b6 (18.h3!?+=) 18...Bh2 (18...Qb6 19.Rd1–/+) 19.Kh1 Qb8 (19...Qe5 20.Nf3 Qh5 21.Rd1–+) 20.f4 (20.g3 Bg3 21.fg3 Qg3=+) 20...Bg3 (20...Ng4 21.Bc1 Qd6 22.Rf3–/+) 21.Rf3 (21.Ba3 Nce4 22.Ne4 Ne4=+) 21...Bh4 (21...Be1 22.Ba3 Be6 23.Ne6 Ne6 24.Rh3–/+) 22.Nf5 (22.g3 Bg4 23.gh4 Bf3 24.Nf3 Re3=) 22...Bf5 (better 22...Be1!?–/+) 23.Qf5= Nfe4?? (better 23...Ncd7 24.g3 Qd6= (worse 24...Nb6 25.Bb3+=)) 24.Ne4 (better 24.Qf7 Kh8 25.Ne4+–) 24...Ne6 25.Be5 (25.Qh5 Rd8+–) 25...Qa8 (25...Qd8 26.Nd6 Qe7 27.Qg4+–) 26.Rh3 Qa4 (26...Qa5 27.Kh2 Qe1+–) 27.Rh4 Qc4 28.Qh7 Kf8 29.Bd6 (29.Bd6 Re7 30.Qh8) 1–0. BeepBeepImAJeep (2595) – Tayka (2595), lichess.org, 2017.

4.c4 b6 5.a4 Bb7 6.b5 cb5 7.Nf3?? (7.ab5 dc4 8.Nf3 Bd5=) 7...dc4?? (better 7...bc4 8.d3 Rc8–+) 8.ab5= c3 (8...Bd5 9.Nc3 Nc5 10.Ne5 Nd3 11.Nd3 cd3 12.Nd5 Qd5 13.Ra3+=) 9.Nc3+= Rc8 (9...e6 10.Be2+=) 10.Be2 Qc7 (10...Rc7 11.0–0+–) 11.Ra7 Bf3?? (better 11...Qb8 12.Qa1 e5+–) 12.Rc7+– Rc7 13.Bf3 Nc5 (13...Ngf6 14.Qa1 Kd8 15.Na4+–) 14.0–0 (better 14.Qa1 f6 15.Qa8 Kf7+–) 14...Nd3 (14...Nf6 15.Bc6 Kd8 16.Na4+–) 15.Ba3 (15.Qa4 f5 16.Bc6 Kf7 17.Qc4 e6 18.Qd3 Be7+–) 15...Nf2 (15...Ne5+–) 16.Rf2 e6 17.Bc6 Kd8 18.Bf8 Nf6 19.Bg7 Rg8 20.Bf6 Kc8 21.Qa1 (21.Qa1 Rg2 22.Rg2 Rc6 23.Qa8 Kc7 24.Qa7 Kd6 25.Qe7) 1–0. BeepBeepImAJeep (2620) – gasel (1835), lichess.org, 2016.

4.c4 Ndf6 5.b5 e6 6.a4 Bd6 7.Nf3 Ne7 8.Be2 0–0 (8...dc4 9.Na3=) 9.0–0 Ng6 10.d4 Ne4 11.Nbd2 f5 12.Ne5 Qf6 (12...Ne5!? 13.de5 Bb4 14.Ne4 fe4=) 13.f4+– Be5 14.de5 Qe7 (14...Qh4 15.Ne4 fe4 16.Rc1+–) 15.Ne4 fe4 (15...de4!? 16.Ba3 c5+–) 16.cd5 (16.Ba3 c5 17.cd5 b6+–) 16...ed5 17.Ba3 Qf7 18.Bf8 Nf8 (18...Qf8 19.a5+–) 19.Rc1 Bd7 20.Bg4 (better 20.f5 Be8 21.a5+–) 20...Ne6? (better 20...cb5 21.Bd7 Qd7+–) 21.f5 Ng5 (21...Nf8 22.e6 Qf6 23.ed7 Nd7 24.Be2+–) 22.e6 Qf6 23.ed7 (23.ed7 Nf7 24.Qd4+–) 1–0. BeepBeepImAJeep (2595) – Tayka (2590), lichess.org, 2017.

4.d4 e6 5.a3 f5 (5...Bd6 6.Nf3=) 6.f4 Ngf6 7.Nf3 Ne4 8.Nc3 Bd6 9.Ne4 fe4 10.Nd2 0–0 11.c4 Nf6 12.cd5 (12.Be2!?=) 12...ed5–/+ 13.Be2 Bf5 14.0–0 Qc7 15.Rc1 Qf7 16.g3 a5 17.Qb3 (17.b5 cb5 18.Bb5 Bh3+=) 17...ab4 18.ab4 b5 (18...Bh3 19.Rfe1–/+) 19.Ra1 (19.Rc6!? Qe7 20.g4 Bb4 21.g5 Bd2 22.gf6+=) 19...Ra1 20.Ra1 Ra8?? (better is 20...Qe7–/+) 21.Ra8+– Ne8 (21...Bf8 22.Qa3+–) 22.Qa3 (22.Qc3 Bd7+–) 22...h6 23.Qa7 Qa7 24.Ra7 Nf6 25.Ra6 Ng4 26.Bg4 Bg4 27.Rc6 Bb4 28.Nf1 Bf3 29.Rb6 Kh7 30.Rb5 Bd6 31.Rd5 Bb8 32.Rd8 Bc7 33.d5 Bd8 34.d6 g5 35.Be5 gf4 36.ef4?? Kg6 (36...Kg6 37.Nd2 Bb6 38.Kf1 Kf5+–). Fournier,Frederic – Guest3386571, Partie amicale, 1m + 0s, 2008.

4.Be2 e5 5.a3 Bd6 6.c4 Ngf6 7.b5 0–0 8.Nf3 Re8 (8...dc4 9.bc6 bc6 10.Qc2–/+) 9.0–0 e4 10.Nd4 c5 11.Nb3 b6 (11...dc4 12.Bc4 Ne5 13.Be2–/+) 12.h3 Qe7 13.d4 Bb7 14.dc5 Nc5 15.Nd4 (15.Nc5 Bc5 16.Nc3 Qe6=+) 15...g6 16.Nc6 Bc6 17.bc6 Rac8 18.Nd2 Nd3 19.Bc3 Rc6–/+ 20.Nb3? dc4–+ 21.Nd4 Rcc8 22.Nb5 Bb8 23.a4 Nd5 24.Qc2 Nc3 25.Qc3 Rc5 26.Nd4 Be5 27.Qa3 Bb8 28.Nb5?? Qe5–+ 29.g3 Nf2 30.Rf2 Qg3 31.Rg2 Qh3 32.Bg4 Qh4 33.Rd1?? Be5 34.Nd6?? Bd6 35.Rd6 Rg5 36.Rdd2 Rg4 37.Qd6 Rg2 38.Rg2 Qe7 39.Qd5 Rd8 40.Qc4 Rd1 41.Kf2 Qf6 42.Ke2 Qf3# 0–1. OPA – Jumanjij, Live Game Caissa's Web, 2004.

4.Be2 Ngf6 5.Nf3 (--> 3.e3 Nf6 4.Nf3 Nbd7 5.Be2).

4.Nf3 c5 5.bc5 Nc5 6.Bd4 e6 7.Bb5 (7.Nc3 f6+=) 7...Bd7 (7...Nd7 8.0–0+=) 8.Be2 Nf6 9.0–0 Be7 10.Nc3 Nce4 11.Rb1 Bc6 12.Nb5 a6 (better is 12...Qa5+=) 13.Bb6!+– Qb6 14.Nd6! Bd6 (14...Nd6 15.Rb6) 15.Rb6 0–0 16.Nd4 Bc5 17.Rb1 Bd4 18.ed4 Rfc8 19.Re1 Rc7 20.Bd3 Nd6 (20...Bb5 21.Bb5 ab5 22.Rb5 Ra2 23.f3+–) 21.Qf3 Rac8 22.Qg3 Nfe4 23.Qf4 b5 (23...Rd7+–) 24.f3 e5 (24...Nf5 25.fe4 de4 26.Be4 Be4 27.Qe4 Rc2+–) 25.de5 g5 (25...Nb7 26.fe4 Nc5 27.ed5 Nd3 28.cd3 Bd5 29.a4+–) 26.Qe3 (26.Be4?! gf4 27.ed6 Rb7+/–; 26.ed6?! gf4 27.dc7 Nd2+–) 26...Nf5 27.Qb6 (27.fe4 Ne3 28.Re3 de4+=) 27...Nd2 28.Bf5 Nc4 29.Qd4 Re8 30.e6 h6 (30...Ree7 31.ef7 Rf7 32.Be6+–) 31.Qf6 fe6 (31...Nd6 32.Qe5 Nf5 33.Qc7+–) 32.Be6 Kh7 33.Bf5 Kg8 34.Qg6 Kf8 35.Qh6 Kg8 36.Qg6 Kf8 37.Qf6 Kg8 38.Re8 Be8 39.Re1 Bh5 40.Bg6 Ne5 (40...Nd6 41.Qd8 Kg7 42.Qc7 Kg6 43.Re6 Kf5 44.Qd6 Bf3 45.gf3 d4 46.Qe5#) 41.Re5 Re7 42.Re7 Bg6 43.Qg7# 1–0. Trkn – guest1737, ICC, 2004.

4.Nf3 Qc7 5.c4 Ngf6 6.cd5 Nd5 7.a3 e5 8.e4 N5f6 9.Nc3 Be7 10.d4 0–0 11.Be2 ed4 12.Qd4 Nb6 13.Rd1 Rd8 14.Qe5 Rd1 15.Bd1 Bd6 16.Qd4 Bf8 17.Bb3 Bd7 18.0–0 Re8 19.Ng5 Be6 20.Ne6 fe6 21.f4 Kh8 22.Ne2 Nbd7 23.Qa7 c5 24.Bf6 Nf6 25.e5 Ne4 26.Qa4 Qc6?? 27.b5!! Qb6 28.Qe4 c4 29.Kh1 cb3 30.a4 Be7 31.Nc1 b2 32.Nd3 Ba3 33.Qc4 Qe3 34.Rd1 Rd8 35.Qc2 g6 36.Qb1 Rd4 37.h3 Ra4 38.Qc2 Ra8 39.Kh2 Be7 40.Qb2 Bh4 41.Kh1 Bg3 42.Qc1 Qd4 43.Qb1 Bf4 44.Nf4 Qf4 45.Qb2 Qa4 46.Rd7 Qc4 47.Rb7 Ra2 48.Rb8 Kg7 49.Rb7 Kg8 50.Rb8 Kf7 51.Qb1 Qd5 52.Qf1 Kg7 53.Qf8# 1–0. marus – mantoon, internet, 2001.

4.Nf3 f6 5.a4 e5 6.b5 e4 7.Nd4 c5?? (better 7...Ne5=) 8.Ne6+– Qb6 9.Qh5 g6 10.Qd5 Ne7 11.Qe4 Ne5 12.Nf8 Rf8 13.Be5 fe5 (13...Qe6 4.f4 fe5 15.Qe5 Qe5 16.fe5+–) 14.Qe5 Bd7 (14...Qe6 15.Qe6 (15.Qc5?! Qf6 16.Qd4 Qf2 17.Kd1 h5+–) 15...Be6 16.Nc3+–) 15.Nc3 0–0–0 (15...Rf5 16.a5 Qe6+–) 16.Qe7 Be6 (16...Bf5 17.a5 Qc7 18.Nd5+–) 17.a5 (17.a5 Qd6 18.Qd6 Rd6 19.Ne4+–) 1–0. GuestFWQH – GuestDNKD, freechess.org, 2019.

4.Nf3 Ndf6 5.Bd3 e6 (5...Bg4 6.0–0=) 6.b5 (6.a3 Bd7=) 6...a6 (6...cb5 7.Bb5 Bd7 8.Be2=) 7.a4 (7.bc6 bc6 8.0–0 Bd6=) 7...Bd7 (7...Bd6 8.Ne5=) 8.ba6 (8.0–0 cb5 9.ab5 Bb5 10.Bb5 ab5=) 8...ba6 9.0–0 Bd6 (9...Qb8 10.Ra2=) 10.c4 (10.Qe2 Qb8 11.Ra2 c5=) 10...dc4 (10...c5 11.Nc3 Ne7 12.Rb1=) 11.Bc4+= Qc7 (11...c5 12.e4 Qb8 13.Qc2+–) 12.e4 Ng4?? (better 12...e5+=) 13.Bg7+– f6 (13...Bh2 14.Kh1 Be5 15.Ne5 Ne5+–) 14.Bh8 Bh2 15.Kh1 Bd6 16.d4 e5 (16...N8h6 17.Bf6! Nf6 18.e5+–) 17.Bg8 ed4 (17...Ke7 18.Qb3 Nh6 19.de5 Be5 20.Ne5 Qe5 21.Qa3 c5 22.Bd5 Rh8 23.Qc5 Ke8 24.Nd2+–) 18.Qd4 Be5 (18...0–0–0 19.Qc4 Qa5 20.g3+–) 19.Ne5 Ne5 (19...Qe5 20.Qe5 fe5 21.Bg7+–) 20.Bf6 Ng4 21.f4 Nf6 22.Qf6 Bg4 23.Bc4 Qb6 24.Qh8 Kd7 25.Qa8 Qd4 26.Na3 Qe4 27.Rfd1! Kc7 (27...Bd1 28.Qb7 Double attack (28.Qb7 Decoy)) 28.Qa7 Kc8 29.Ba6 1–0. DEFFM – GuestVLPW, freechess.org, 2018.

4.Nf3 h6 5.c4 dc4 (5...e6 6.c5=) 6.Bc4 e6 (6...Ngf6 7.0–0=) 7.a3 Ngf6 8.0–0 Be7 (8...Bd6 9.d4=) 9.Qc2 (9.d4 a5+=) 9...Qc7 (9...0–0 10.d3=) 10.d4 (10.Rc1 Bd6+=) 10...0–0 (10...a5 11.ba5 Qa5 12.Nc3+=) 11.Nbd2 (11.Bd3 Rd8+=) 11...Rd8 (11...a5 12.ba5 Qa5 13.a4+=) 12.Rfd1 (12.Bd3 a5+=) 12...b6 (12...a5 13.ba5 Qa5 14.a4=) 13.Be2 (13.e4 a5+=) 13...Bb7 (13...a5 14.ba5 Ra5 15.Nc4=) 14.Rac1 (14.Nc4 c5 15.dc5 bc5+=) 14...Rac8 (14...a5 15.ba5 Ra5 16.Nc4=) 15.Qb3 (15.Nc4 a6+=) 15...Qb8 (15...c5 16.Bc4+=) 16.Rc2 (16.Qc3 Nd5 17.Qc4 c5 18.dc5 bc5=) 16...c5= 17.dc5 bc5 18.b5 Bd5 19.Bc4 (19.Nc4 Nb6 20.Nfe5 Ne4=) 19...Nb6 20.Rcc1 (20.Bd5 Rd5 (worse is 20...Nfd5 21.Ne5+/–) 21.Qa2 Na4=) 20...Qb7 (20...Nc4 21.Nc4 Ng4 22.e4 Be4 23.Nfe5–/+) 21.Bf6 Bf6 22.Ne1 Rd6 23.f3 Rcd8 24.Nd3 Bc4 25.Nc4 Nc4 26.Qc4 Qb6 27.a4 Rd5 28.Nf2 Rd2 29.Rd2+/– Rd2 30.Qc5 Ra2 31.Qb6 ab6 32.Ne4 Ra4 33.Nf6+– gf6 34.Rc6 Kg7 35.Rb6 f5 36.Rb7 Rb4 37.h3 Kf6 38.b6 Rc4 39.Rc7+– Rb4 40.b7 Rb6 41.Kh2 Kg6 42.Kg3 f6 43.Rc6 Rb7+/– 44.Re6 Rg7 45.Rd6+– Kf7 46.Kf2 Kg6 47.g3 Rb7 48.Rd2 Re7 49.f4 Re8 50.Kf3 Re7 51.Rd4 Rc7 52.Rd2 Rc3 53.Re2 Rb3 54.Rg2 h5 55.g4 fg4+/– 56.hg4 hg4 57.Rg4 Kf5 58.Rg2 Rb4 59.Rc2 Rb1 60.Rc5 Kg6 61.Rd5 Rb4 62.Kg4 Re4 63.Kf3 Rb4 64.Rd4 Rb5 65.Rd6 Rb4 66.Kg4 Re4 67.Kf3 Rb4 68.Rd5 Ra4 69.f5 Kg5+= 70.e4 Ra3= 71.Ke2 Kf4 ½–½. Engelhardt,Erhard (1640) – Knebel,Klaus, Berlin, 2006.

4.f4 Qc7 5.Nf3 Ngf6 6.a3 e6 7.Bd3 Bd6 8.c4 e5 9.c5+/– e4? 10.cd6+– Qd6 11.Bc2?? ef3= 12.Qf3 h5 13.Qg3 Rg8 14.Qg5 g6 15.Nc3 Qe6 16.Ne2 Ne4+= 17.Qh4 Qe7 18.Qe7+/– Ke7 19.Rc1 f5? 20.Nd4 Ndf6 21.Bb3 Bd7 22.Nf3 Rgc8 23.Ne5 Be8 24.Ke2 Nd7 25.Nf3 a5 26.b5 Ndc5 Black plans a4 27.Ba2 a4 28.d3 Nb3?? 29.Bb3+– ab3 30.de4 fe4 31.Nd4 c5+/– 32.Nb3 Bb5 33.Kf2 b6 34.Nd2 Bd3 35.Nb1 Ke6 36.Nc3 b5 37.Kg3 b4 38.ab4+/– cb4 39.Nd1 Bc2 40.Be5 g5 41.Ra1 gf4+= 42.ef4 Ra1 43.Ba1 d4? 44.Bd4+– Rd8 45.f5 Kf7 46.Ne3 Rd4 47.Nc2 Rc4 48.Ne3 Rd4 49.Kf4 (49...Rd7 50.Rb1+–) 1–0. Finenko – Burakov, USSR, 1990.

4.f4 Ngf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.f4 Nbd7).

4.a4 e5

5.b5 Ngf6 6.c4 Bc5 7.Nf3 0–0 8.cd5 cd5 9.Be2=+.

5.b5 Ngf6 6.c4 Bd6 7.h3 0–0 8.Nf3 Qe7 9.Be2 Nb6 10.Qc2 (better is 10.c5!? Bc5 11.Be5 cb5 12.ab5=) 10...e4–/+ 11.Nd4 c5 (11...dc4?! 12.bc6 bc6 13.Nc6=) 12.Nb3 Be6 13.Na5 Rac8 14.Na3 Bb8 15.cd5 Nbd5 16.N5c4 Rfd8 17.Qb1 Nb4 18.Bc3 Nd3 19.Bd3 Rd3 20.Qb2 Rd5 (better is 20...Nd7!?–+) 21.b6 a6 22.a5 Rcd8 23.0–0 (23.Bf6 gf6 24.Qc2 Rd3+=) 23...Rg5 (23...Bh3!? 24.Bf6 gf6 25.f4–/+) 24.f4–/+ ef3 25.Rf3 Bc4 (better is 25...Ne4!?–/+) 26.Bf6= gf6 27.Qf6?? (better is 27.Nc4 Be5 28.Ne5 fe5 29.Raf1+=) 27...Rg2! 28.Kg2 Qf6 (28...Qf6 29.Rf6 Rd2 30.Rf2 Bd5 31.Kf1 Rd3+=) 0–1. Buck,K1 (1835) – Lehtosaari,K (2025), TCh–Eur Seniors, Dresden GER, 2010.

5.b5 Ngf6 6.c4 Be7 7.Qc2 (7.cd5 cd5 8.Nf3 e4=+) 7...0–0–/+ 8.Be2 (8.cd5 cd5 9.Nf3 e4=+) 8...Re8 (8...e4 9.bc6 bc6 10.Nc3–/+) 9.d3? (better 9.Nf3!?=+) 9...Bb4–+ 10.Nd2 Nf8 (better 10...Nc5!? 11.Ngf3 e4 12.de4 de4–+) 11.Ngf3=+ Ng6 (11...e4 12.de4 de4 13.Nd4=) 12.0–0 Bg4 (12...Bf5 13.Rab1 Qd6 14.Rfc1=) 13.Nb3 (13.h3 Bf5=) 13...Rc8 14.h3 Bf5 15.Nfd2 (15.g4 Bd7=+) 15...a5 (15...h6 16.c5=+) 16.e4 (16.ba6 ba6 17.Rfb1 h6=+) 16...Be6 (16...Nf4 17.Bf3 Bg6 18.bc6 Rc6 19.Rac1–/+) 17.Rfc1 (17.Nf3 cb5 18.ab5 Bd7–/+) 17...d4 (17...Nf4 18.Bf1 de4 19.de4–/+) 18.Ba3 (18.Nf3 Qc7–/+) 18...Ba3 (18...Nf4 19.Nf3–/+) 19.Ra3 c5 20.Nf3 h6 21.Qd2 Bd7?? (better 21...b6–/+) 22.Qa5+– Nf4 (22...Rc7 23.Qd2+–) 23.Bf1 (23.Qd8!? Red8 24.Bf1 Re8+–) 23...b6 (23...Rc7 24.Qa7+–) 24.Qd2 Nh7 (24...N6h5+–) 25.Rc2 (25.h4 Qf6 26.a5 ba5+–) 25...Ng5 (25...Qf6 26.a5 Nh3 27.Kh1 ba5 28.Ra5+=) 26.Ng5+– Qg5 27.Kh2 Qg6 (27...Re6+–) 28.g3 (28.a5 ba5 29.Ra5 Qd6+–) 28...Ne6 (28...Nh3!? 29.a5 Ra8=) 29.f4 (29.Bg2 Qf6+–) 29...ef4 (29...f5 30.g4 Nf4 31.gf5 Bf5 32.ef5 Qf5 33.Qd1+=) 30.gf4+– Qf6 31.f5 Ng5 (31...Qe5!? 32.Kh1 Ng5+–) 32.Qf4+– Ne6 (32...Ra8!?+–) 33.Qg3 (33.Qd6 Rcd8+–) 33...Ng5 34.Rg2 (34.a5 Ne4 35.de4 Re4+–) 34...Kh8? (34...Bf5 35.Qf2 (35.ef5? Re3–+) 35...Qd6 36.Qg3=) 35.h4 (better 35.Nd2+–) 35...Nh7?? (better 35...Ne4 36.de4 Re4+=) 36.Nd2 (36.a5!? Rg8+–) 36...Rg8 (36...g6 37.fg6 fg6 38.a5 ba5 39.Ra5+–) 37.Qf4 (37.a5 Ra8+–) 37...g5 (37...Ra8 38.Nf3+–) 38.hg5 Ng5 (38...hg5 39.Qg3 Qh6 40.Kg1 g4+–) 39.Nf3 (better 39.a5 ba5 40.Ra5+–) 39...Nf3+= 40.Qf3 Rg2 (40...Qh4!? 41.Kg1 Rg2 42.Bg2 Qe1 43.Kh2 Qd2+=) 41.Bg2+– (41.Kg2?! Qh4 42.Kg1 Rg8 43.Bg2 Qe1 44.Kh2 Qh4 45.Kg1 Qe1 46.Kh2 Qh4 47.Kg1=; 41.Qg2?? Qh4 42.Qh3 Qf4 43.Kh1 Rg8–+) 41...Rg8 (better 41...Qh4!? 42.Bh3 Rg8+–) 42.Qf4+– Rg5? (42...Qg7 43.Ra2+–) 43.Bf3 (43.a5 Rh5 44.Kg1 ba5 45.Ra5 Kh7+–) 43...Kh7? (43...Qd8 44.Qd6 Kh7 45.a5 ba5 46.b6+–) 44.Ra2 (44.a5 ba5 45.Ra5 Rg8+–) 44...Rg8 (44...Qd8 45.a5! ba5 46.Qd6+–) 45.Rg2 (better 45.a5!? ba5 46.Ra5 Qg7+–) 45...Ra8?? (45...Rg2 46.Bg2 Qg5+–) 46.e5 (46.e5 Qf5 47.Be4 Rf8 48.Bf5 Bf5 49.Qf5 Kh8 50.Qf6 Kh7 51.Qg7) 1–0. Schmidtke – Gottschalk, Putlitz–Wismar, 2000.

5.b5 Ngf6 6.d3 Bb4 7.Nd2 0–0 8.g3 (8.Ngf3!?=+) 8...Re8 9.Bg2 (9.Ngf3 a6–/+) 9...cb5 (9...Qa5!? 10.Ngf3–/+) 10.ab5 Qb6 11.c4? (better is 11.Ne2!?–/+) 11...dc4 (11...Nc5 12.Kf1 Nd3 13.Qb3–+) 12.dc4 (12.Ne2 Nc5 13.0–0 Bd2 14.Qd2 Nb3–+) 12...Nc5 13.Qe2?? (better is 13.Qc2–+) 13...Rd8 14.Rd1 (14.Ngf3 Nd3 15.Kf1 Nb2 16.Rb1–+) 14...Nd3 15.Qd3 Rd3 16.Ngf3 (16.Bc1 Bg4 17.Ngf3 Rad8–+) 16...e4 (16...Re3 17.Kf1 Ng4 18.fe3 Qe3 19.Ne4 Qe4 20.Rd8 Bf8 21.h3 Qb1 22.Ke2 Qb2 23.Rd2–+) 17.Ne5 Rd2 18.Rd2 Bd2 19.Kd2 Be6 20.Bd4 Qa5 21.Bc3 Qa2 22.Ke1 Bc4 23.Nc4 Qc4 24.Bd2 Qb5 25.Bf1 Qb1 26.Ke2 Rd8 27.Bg2 Qd3 (28.Ke1 Qd2 29.Kf1 Qd1#) 0–1. MasterofDisaster – Wookie2004, Caissa's Web, 2004.

5.b5 Ngf6 6.Be2 Bd6 7.Nf3 Qc7 8.c4 (8.bc6 bc6 (worse is 8...Qc6 9.Ne5 Be5 10.Be5+/–) 9.Nc3 Rb8+=) 8...e4–/+ 9.Nd4 Bh2 10.Nf5 g6 11.Nd4 (11.g3!? gf5 12.Rh2+=) 11...Be5–/+ 12.Ba3? (better is 12.bc6 bc6 13.Nc3–/+) 12...c5–+ 13.Nb3 Ba1 14.Nc3 (14.Na1 dc4 15.Bb2–+) 14...Bc3 15.dc3 dc4 16.0–0 (16.Nd2–+) 16…cb3 0–1. tanto (1610) – jupiter (2220), net–chess.com, 2002.

5.b5 Ngf6 6.Nf3 Bd6=+.

5.Nf3 Bb4 6.Ne5 Ne5 7.Be5 f6 8.Bb2 (8.Bc3 Bd6=) 8...Nh6 (8...Bf5 9.Be2=) 9.Qh5 Kf8 (9...Nf7 10.Bd3=) 10.c4 (10.Bd3 Bd6=) 10...Bg4 (10...Be6 11.cd5 Qd5 12.Qd5 Bd5 13.Nc3=) 11.Qh4 dc4 (11...f5 12.Qg3 Bd6 13.Be5 Be5 14.Qe5+=) 12.Bc4+= Be7 (12...f5 13.Qg3 Bd6 14.Be5 Be5 15.Qe5+=) 13.Ba3 (13.0–0 Qa5 14.f3 Qb4 15.fg4 Qc4=) 13...Ba3 14.Na3 Qd6 (14...a6 15.Nc2+=) 15.0–0= Qd2 16.h3 Be2 (better 16...Bf5=) 17.Be2+– Qe2 18.Qb4 Ke8 (18...Kf7!? 19.Qb7 Kg6 20.Qc6 Rhd8+–) 19.Qb7 Rd8 20.Qg7 Nf7 21.Qf6 (21.Rac1 Qa6 22.Rc4 f5+–) 21...Rf8?? (21...Rd6 22.Qf5 Rg8+–) 22.Qe6 1–0. Anonymous – Anonymous, lichess.org, 2020.

5.Nf3 Bb4 6.Ne5 Ndf6 7.Be2= Bd6 8.Nf3 (8.0–0 Ne7=) 8...Bg4 (8...Nh6 9.0–0=+) 9.0–0 Bf3 (9...Nh6 10.Ne5 Be2 11.Qe2=) 10.Bf3 Nh6 (10...Qc7 11.h3=) 11.c4 (11.d3 0–0=) 11...0–0 (11...dc4 12.Na3=) 12.cd5 cd5 (12...Nd5 13.Bd5 cd5 14.Qh5=) 13.d3 (13.Bf6 Qf6 14.d4 Nf5+=) 13...Rc8 (13...Re8 14.Bf6 Qf6 15.d4+=) 14.h3 (14.Na3 a6+=) 14...Rc7 (14...Re8+=) 15.e4 (better 15.Nc3!? Rc6 16.a5+–) 15...de4=+ 16.de4 Qe7 17.Re1 Be5 (17...Rd8 18.Qb3=) 18.Ba3= Bd6?? (better 18...Qe6 19.Bf8 Ba1=) 19.Bd6+– Rd7 (19...Qd8 20.Bf8 Qf8+–) 20.Be7 Rd1 (20...Re7 21.g4 Re5 22.Qd2+–) 21.Rd1 Re8 1–0. DEFFM – GuestTBPZ, freechess.org, 2016.

4.a4 Ngf6

5.c4 e6 6.c5 (6.b5 Bd6+=) 6...b6 (6...a5 7.d4 ab4 8.Bd3–/+) 7.d4+= bc5 8.bc5 Ne4 (8...Rb8 9.Ra2+=) 9.a5 Qf6 (9...Rb8 10.Ra2+=) 10.Qc2= Be7 (10...Rb8 11.Ra2=) 11.Nf3 (11.Bd3 Rb8 12.Ra2 Ng5+=) 11...Rb8= 12.Ra2 0–0 (12...Qg6 13.Nc3=) 13.Bd3= Qg6 14.0–0 h6 (14...f5 15.Ba3=) 15.Nbd2+= f5 16.a6 (16.Nb3=) 16...Ndf6 (better is 16...e5!?=) 17.Ne5+/– Qh5?? (17...Qe8 18.Nb3+/–) 18.Ne4 (better is 18.Nc6 Bd8 19.Be4 fe4 20.Nb8+–) 18...fe4+/– 19.Be2 Qe8 20.Rb1 Nd7 (better is 20...Bd8+/–) 21.Nc6+– Ra8 22.Ne7 Qe7 23.Ba3 Qf7 24.Bf1 Re8 25.Rab2 (25.c6 Nf8+–) 25...e5 26.c6 Nb6 27.Bd6 (27.de5 Re5 28.Bc5 Qc7+–) 27...Nc4? (better is 27...ed4 28.ed4 Bf5+–) 28.Bc4 dc4 29.de5 Qd5 (29...Ba6 30.Rc1+–) 30.c7 (better is 30.Qa4 Qd3+–) 30...Ba6 (30...Qc6 31.Rb5+–) 31.Rb8 (31.Qa4 Rec8 32.Qa6 Qd3+–) 31...Kh7 (31...Qc6 32.R8b4+–) 32.Re8 (32.Qa4 Qd3+–) 32...Re8 33.Qa4 Ra8 (33...Qd3 34.Ra1 c3 35.Qe8 c2+–) 34.Qa6 Qd3 35.Rf1 c3 36.Qc6 (better is 36.c8Q Rc8 37.Qc8 c2+–) 36...Rc8 37.e6 c2 38.e7 a5 39.e8Q (39.Bg3 a4+–) 39...Re8 40.Qe8 Qf1 41.Kf1 c1Q 42.Ke2 Qc2 43.Ke1 ½–½. Bittner – Kharadi, corr, 1986.

5.Nf3 Qc7 +=.

5.Nf3 g6 6.c4 a6 7.Nc3 e6 8.c5 Bg7 9.d4 0–0 10.Bd3 Re8 11.Ne2 Ne4 12.Qc2 f5 13.Nd2 e5 14.Nb3 Qg5 15.g3 ed4 16.Nbd4 Ne5 17.Nf4 Nd3 18.Qd3 Qe7 19.h4? (19.a5 g5 20.Nfe2 g4=) 19...Bd7 (better is 19...a5!? 20.b5 Qc5–+) 20.a5=+ Qf7 21.Qe2 Re7 22.0–0–0 Rae8 23.Kc2 h6 (23...h5 24.Nf3=) 24.Rh2 (24.h5!? g5 25.Ng6+/–) 24...h5 25.Rd3 Bc8 26.Rh1 Bf6 27.Kb3 Bg7 28.Bc1 Bd7 29.Ka4?? (better is 29.Bb2=+) 29...Bd4–+ 30.Rd4 (30.Kb3 Be5 31.Bb2 d4 32.Ka3 Bf4 33.gf4 de3 34.Qe3–+) 30...Nc3 31.Kb3 Ne2 32.Ne2 Re4 33.Bb2 Rd4 34.Bd4 Re4 35.f4 (35.Nf4 Qe8–+) 35...Qe7 36.Nc3 Re3 37.Be3 Qe3 38.Kc2 d4 39.Nd1 Qe4 (40.Kd2 Qh1–+) 0–1. Vesson,Eric – Scozzesi,Francois, Saint Quentin opB, 1999.

4.Bb2 Qc7

5.a3 A) 5...e5 6.c4 (6.Be2 Ngf6 7.0–0 Bd6 8.Nh4 Nb6 9.f4 ef4 10.Bf6 gf6 11.ef4+=; 6.d3 a5 7.Nbd2 Ngf6 8.ba5 Ra5 9.c4 Be7 10.cd5 Rd5 11.e4=; 6.Bc3 Bd6 7.Be2 Ne7 8.d3 0–0 9.Nbd2 f5 10.Nb3 b6 11.Rb1+=) 6...e4 7.Nd4 dc4 8.Nc3 Ngf6 9.Qc2 b5 10.Ne4 a5 11.Nf5=; B) 5...Ngf6 6.c4 (6.d4 e6 7.c4 a5 8.b5 Be7 9.Nc3 0–0 10.Rc1 Re8 11.Qb3+=; 6.Bf6 Nf6 7.d4 Bg4 8.Bd3 e5 9.de5 Bf3 10.Qf3 Qe5 11.Ra2=) 6...e5 7.cd5 cd5 8.Nc3 Qb6 9.Qb3 Qe6 10.e4 Bd6 11.ed5+=; C) 5...e6 6.c4 (6.d4 b5 7.Bd3 Bd6 8.Nbd2 a5 9.Bc3 ab4 10.ab4 Ra1 11.Qa1=; 6.Be2 e5 7.c4 e4 8.Nd4 dc4 9.Nc3 Ngf6 10.Qc2 c5 11.bc5=; 6.Nc3 e5 7.Be2 Bd6 8.Ng5 Ngf6 9.d3 a5 10.b5 0–0 11.Rb1+=) 6...Ngf6 7.d4 a5 8.b5 Be7 9.Nc3 0–0 10.Rc1 Qd8 11.c5+=; D) 5...a5 6.c4 (6.Be2 ab4 7.ab4 Ra1 8.Ba1 e5 9.Bc3 Bd6 10.b5 Ngf6 11.Nh4+=; 6.b5 e5 7.Nc3 Bd6 8.h3 Ngf6 9.Be2 0–0 10.0–0 c5 11.d3+=; 6.ba5 e5 7.Bc3 Ngf6 8.d4 e4 9.Nfd2 Bd6 10.Bb4 Bh2 11.c4+=) 6...ab4 7.cd5 cd5 8.ab4 Ra1 9.Ba1 e5 10.Bb5 Bd6 11.Bc3=.

5.b5 A) 5...Ngf6 6.bc6 (6.Bf6 Nf6 7.bc6 bc6 8.d4 Rb8 9.c4 Bg4 10.Nbd2 e5 11.Rb1+=; 6.Nc3 e5 7.Be2 Bd6 8.bc6 bc6 9.Rb1 Rb8 10.d3 0–0 11.a3+=; 6.Be2 e5 7.Nc3 Bd6 8.bc6 bc6 9.Rb1 Rb8 10.h3 0–0 11.0–0+=) 6...bc6 7.Bf6 Nf6 8.d4 Rb8 9.Nbd2 e6 10.Bd3 c5 11.c4=; B) 5...e5 6.c4 (6.Be2 Bd6 7.bc6 bc6 8.Ba3 Ba3 9.Na3 Ngf6 10.Rb1 0–0 11.0–0+=; 6.Nc3 Ngf6 7.bc6 bc6 8.Rb1 Bd6 9.Be2 Rb8 10.h3 0–0 11.0–0+=; 6.bc6 bc6 7.Nc3 Rb8 8.Rb1 Bd6 9.Be2 Ngf6 10.h3 0–0 11.0–0+=) 6...e4 7.Nd4 Ngf6 8.Nc3 c5 9.Nde2 dc4 10.Ng3 Ne5 11.Nge4=; C) 5...a6 6.ba6 (6.bc6 bc6 7.Nc3 e5 8.Rb1 Rb8 9.h3 Ngf6 10.Ne2 Bd6 11.a3–/+; 6.a4 e5 7.Be2 Bd6 8.bc6 bc6 9.Nc3 Ngf6 10.Rb1 0–0 11.d3+=) 6...ba6 7.Nc3 e5 8.Rb1 Bd6 9.Be2 Rb8 10.h3 Ngf6 11.0–0+=.

5.c4 A) 5...Ngf6 6.a3 (6.Nc3 e5 7.cd5 Bb4 8.dc6 bc6 9.Qa4 Rb8 10.a3 Bd6 11.Qc2=; 6.cd5 Nd5 7.a3 e5 8.e4 N5f6 9.d4 Bd6 10.Bd3 ed4 11.Bd4=; 6.d4 e5 7.de5 Bb4 8.Nbd2 Bd2 9.Qd2 Ne4 10.Qd4 Qa5 11.Nd2=) 6...e5 7.cd5 cd5 8.Nc3 a6 9.Rc1 Qb6 10.Be2 Be7 11.Na4+/–; B) 5...e5 6.cd5 (6.a3 e4 7.Nd4 dc4 8.Nc3 Ngf6 9.Qc2 b5 10.Ne4 a5 11.Nf5=; 6.Qb3 Ngf6 7.cd5 Nd5 8.Bc4 e4 9.Ng5 Ne5 10.Nc3 Nc4 11.Qc4=) 6...cd5 7.Nc3 Ngf6 8.Nb5 Qb6 9.Be5 Ne5 10.Ne5 Be7 11.a3+=; C) 5...dc4 6.Bc4 (6.a3 b5 7.d3 cd3 8.Bd3 a5 9.Qc2 ab4 10.Bb5 Bb7 11.0–0=) 6...Ngf6 7.Qb3 e6 8.0–0 b5 9.Be2 a5 10.ba5 Ra5 11.Rc1+=; D) 5...e6 6.a3 (6.cd5 ed5 7.Be2 Ngf6 8.a3 Bd6 9.0–0 0–0 10.Qc2 Re8 11.Rc1=; 6.Qb3 Ngf6 7.d4 a5 8.ba5 Qa5 9.Bc3 Qa4 10.Bd3 dc4 11.Bc4=; 6.b5 Ngf6 7.Nc3 Bd6 8.bc6 bc6 9.d4 Rb8 10.Qc2 e5 11.c5=) 6...Ngf6 7.d4 a5 8.b5 Be7 9.Nc3 0–0 10.Rc1 Re8 11.Qb3+=.

5.Be2 A) 5...Ngf6 6.d4 (6.0–0 e5 7.a3 Bd6 8.Nh4 Nb6 9.f4 ef4 10.Bf6 gf6 11.ef4+=; 6.a3 e5 7.0–0 Bd6 8.Nh4 Nb6 9.f4 ef4 10.Bf6 gf6 11.ef4+=; 6.Nc3 e5 7.b5 Bd6 8.bc6 bc6 9.Rb1 0–0 10.h3 Rb8 11.a3+=) 6...e6 7.a3 a5 8.b5 cb5 9.Bb5 Bd6 10.c4 dc4 11.Ne5=; B) 5...Nh6 6.c4 (6.0–0 e5 7.b5 Bd6 8.bc6 Qc6 9.Nc3 0–0 10.Bb5 Qb6 11.Rb1=; 6.Nc3 e5 7.a3 Bd6 8.h3 0–0 9.0–0 Nf6 10.b5 c5 11.d3+=; 6.b5 e5 7.Nc3 Bd6 8.Rb1 0–0 9.bc6 bc6 10.a3 Rb8 11.h3+=) 6...dc4 7.Bc4 e5 8.Qb3 b5 9.Bd3 a5 10.a3 Bd6 11.0–0=; C) 5...Qd6 6.a3 (6.b5 cb5 7.Bb5 a6 8.Bd7 Bd7 9.Be5 Qc6 10.Bf4 Bg4 11.Nc3=; 6.Ba3 b5 7.0–0 e5 8.d3 Be7 9.c4 dc4 10.dc4 Qd1 11.Rd1=; 6.c3 e5 7.0–0 Ngf6 8.d3 Be7 9.a3 a5 10.Nbd2 0–0 11.c4=) 6...e5 7.0–0 Ngf6 8.c4 dc4 9.Bc4 b5 10.Bb3 a5 11.d4+=; D) 5...e5 6.b5 (6.a3 Ngf6 7.0–0 Bd6 8.Nh4 Nb6 9.f4 ef4 10.Bf6 gf6 11.ef4+=; 6.Ba3 Ngf6 7.0–0 Bd6 8.Nh4 Nb6 9.b5 c5 10.h3 0–0 11.d4+=; 6.Bc3 Bd6 7.d3 Ngf6 8.Nbd2 0–0 9.Rb1 Rd8 10.a4 Re8 11.a5–/+) 6...Bd6 7.bc6 bc6 8.Ba3 Ba3 9.Na3 Qd6 10.Qc1 Rb8 11.0–0+=.

4.Bb2 e6

5.a3 A) 5...a5 6.b5 (6.Bd3 ab4 7.ab4 Ra1 8.Ba1 Ngf6 9.b5 Bd6 10.0–0 e5 11.Be2+=; 6.Be2 ab4 7.ab4 Ra1 8.Ba1 Ngf6 9.Bc3 Bd6 10.0–0 0–0 11.b5+=; 6.ba5 Ngf6 7.Be2 Bd6 8.0–0 0–0 9.Nd4 Ra5 10.f4 Re8 11.Nc3+=) 6...Ngf6 7.c4 Bd6 8.d4 dc4 9.bc6 bc6 10.Nbd2 Nb6 11.Nc4=; B) 5...Qc7 6.c4 (6.d4 b5 7.Bd3 Bd6 8.Nbd2 a5 9.Bc3 ab4 10.ab4 Ra1 11.Qa1=; 6.Be2 Ngf6 7.0–0 e5 8.d3 Bd6 9.Nh4 Nb6 10.c4 e4 11.Bf6+=; 6.Nc3 e5 7.b5 Ngf6 8.Rb1 Bd6 9.Be2 c5 10.Nh4 Nb6 11.0–0+=) 6...Ngf6 7.Nc3 Bd6 8.c5 Be7 9.d4 b6 10.Bd3 bc5 11.bc5+=; C) 5...Ngf6 6.c4 (6.Be2 Bd6 7.0–0 0–0 8.Nc3 e5 9.Re1 Qc7 10.h3 b5 11.a4+=; 6.Nc3 Bd6 7.Be2 e5 8.0–0 Qc7 9.Nh4 Nb6 10.h3 0–0 11.Nf3+=; 6.Bd3 Bd6 7.0–0 0–0 8.Nc3 e5 9.e4 a6 10.Re1 Qc7 11.Rc1+=) 6...Bd6 7.c5 Bc7 8.Be2 0–0 9.d4 Qe7 10.0–0 e5 11.de5=.

5.Nc3 A) 5...e5 6.a3 (6.b5 Ngf6 7.Be2 c5 8.0–0 Bd6 9.Ng5 0–0 10.a4 h6 11.Nf3+=) 6...Ngf6 7.Be2 Bd6 8.0–0 0–0 9.Re1 Qc7 10.h3 b5 11.a4+=; B) 5...Qc7 6.Be2 (6.b5 e5 7.Be2 Bd6 8.Rb1 Ngf6 9.h3 c5 10.0–0 0–0 11.d3+=; 6.e4 Ngf6 7.ed5 ed5 8.b5 Bd6 9.bc6 bc6 10.Rb1 0–0 11.Be2+=; 6.Rb1 e5 7.b5 Ngf6 8.h3 Bd6 9.Be2 c5 10.0–0 0–0 11.d3+=) 6...e5 7.b5 Bd6 8.a4 Ngf6 9.bc6 bc6 10.Ba3 Rb8 11.Bd6+=; C) 5...Nh6 6.b5 (6.a3 e5 7.Be2 Bd6 8.0–0 0–0 9.Re1 Qc7 10.e4 Nf6 11.d4+=; 6.Rb1 e5 7.b5 Bd6 8.Be2 0–0 9.0–0 e4 10.Ne1 Qc7 11.h3=; 6.Ne2 Qc7 7.Rc1 e5 8.b5 Bd6 9.c4 dc4 10.Rc4 Qb6 11.Nc3=) 6...e5 7.Be2 Bd6 8.0–0 0–0 9.Rb1 e4 10.Ne1 Qc7 11.h3=; D) 5...Ngf6 6.a3 (6.b5 e5 7.Be2 cb5 8.Nb5 a6 9.Nc3 b5 10.0–0 Bd6 11.Nh4+=) 6...e5 7.Be2 Bd6 8.0–0 Qc7 9.Nh4 Nb6 10.h3 0–0 11.Nf3+=.

5.Bd3 A) 5...f6 6.Nh4 (6.c3 e5 7.e4 f5 8.ed5 e4 9.Qe2 Ne7 10.dc6 bc6 11.Be4+=; 6.a3 e5 7.Be2 Bd6 8.0–0 Qc7 9.h3 Ne7 10.c4 dc4 11.Bc4+=; 6.Bc3 e5 7.Nh4 Nh6 8.Qh5 g6 9.Bg6 hg6 10.Ng6 Rh7 11.Ne5=) 6...Nh6 7.a3 e5 8.e4 de4 9.Be4 a5 10.Qh5 g6 11.Bg6=; B) 5...Qc7 6.c4 (6.0–0 e5 7.Bf5 e4 8.Ng5 Ndf6 9.Bc8 Rc8 10.a3 h6 11.Nh3+=; 6.a3 Ngf6 7.0–0 e5 8.Bf5 Bd6 9.h3 Nb6 10.Bc8 Rc8 11.d3+=; 6.b5 e5 7.e4 Ngf6 8.bc6 bc6 9.ed5 cd5 10.Qe2 Bd6 11.Na3+=) 6...Ngf6 7.cd5 cd5 8.Qa4 Be7 9.Nc3 0–0 10.Nb5 Qd8 11.Rc1=; C) 5...e5 6.Ne5 (6.Be5 Ne5 7.Ne5 Bb4 8.0–0 Nf6 9.f4 0–0 10.c4 Be6 11.Qc2+=; 6.e4 de4 7.Be4 Bb4 8.Ne5 Ne5 9.Be5 Nf6 10.Bf3 0–0 11.0–0+=) 6...Ne5 7.Be5 Qg5 8.Bg3 Bb4 9.a3 Bc5 10.0–0 Bg4 11.f3=; D) 5...Ngf6 6.Bc3 (6.b5 Bd6 7.0–0 e5 8.Bf5 0–0 9.bc6 bc6 10.Nc3 Qc7 11.d3+=; 6.a3 Bd6 7.0–0 0–0 8.Nc3 e5 9.e4 a6 10.Re1 Qc7 11.Qe2+=) 6...Bd6 7.0–0 0–0 8.Nd4 Ne4 9.Be4 de4 10.f3 Nf6 11.fe4+=.

5.Be2 A) 5...Qc7 6.a3 (6.0–0 e5 7.b5 Bd6 8.bc6 bc6 9.Ba3 Ngf6 10.d4 0–0 11.c4=; 6.b5 e5 7.Nc3 Bd6 8.h3 Ngf6 9.Rb1 c5 10.0–0 0–0 11.d3+=; 6.Nc3 e5 7.b5 Bd6 8.bc6 bc6 9.Rb1 Ngf6 10.Nh4 Nb6 11.Nf3+=) 6...e5 7.c4 e4 8.Nd4 dc4 9.Nc3 Ngf6 10.Qc2 c5 11.bc5=; B) 5...e5 6.Ne5 (6.0–0 Bd6 7.a3 Qc7 8.h3 Ngf6 9.Nc3 0–0 10.Ra2 b5 11.a4+=; 6.a3 Bd6 7.0–0 Qc7 8.h3 Ngf6 9.Nc3 0–0 10.Nh4 Nb6 11.Nf3+=; 6.b5 Bd6 7.Nc3 Ngf6 8.0–0 0–0 9.Rb1 c5 10.d3 Qc7 11.h3+=) 6...Ne5 7.Be5 Qg5 8.Bg3 Bb4 9.a3 Be7 10.d4 Nf6 11.Nd2=; C) 5...f6 6.a3 (6.c3 e5 7.0–0 Bd6 8.d3 Ne7 9.Ba3 0–0 10.c4 b5 11.Nc3=; 6.b5 cb5 7.Bb5 a6 8.Be2 Bd6 9.0–0 e5 10.Nc3 Ne7 11.a4=; 6.Bc3 e5 7.0–0 Bd6 8.d4 e4 9.Nfd2 Qc7 10.h3 Ne7 11.Bh5+=) 6...Bd6 7.0–0 e5 8.Nc3 Ne7 9.e4 d4 10.Nb1 Nb6 11.c3=; D) 5...Ngf6 6.a3 (6.b5 cb5 7.Bb5 Bd6 8.0–0 0–0 9.Ba3 Ba3 10.Na3 Qa5 11.Qc1+=; 6.Bc3 Bd6 7.a3 e5 8.0–0 0–0 9.Nh4 Nb6 10.Nf3 Re8 11.Ra2+=; 6.c3 Bd6 7.0–0 e5 8.d3 Qc7 9.Nbd2 0–0 10.Qc2 Re8 11.e4+=) 6...Bd6 7.0–0 0–0 8.Nd4 a5 9.ba5 Qa5 10.f4 Qb6 11.Qc1+=.

4.Bb2 f6

5.a3 A) 5...e5 6.c4 (6.Nc3 Bd6 7.Be2 Qc7 8.e4 d4 9.Na2 Ne7 10.c3 f5 11.ef5=; 6.Be2 Bd6 7.0–0 Qc7 8.h3 Ne7 9.c4 dc4 10.Bc4 a5 11.Qb3=; 6.d4 e4 7.Nfd2 Bd6 8.c4 Ne7 9.cd5 cd5 10.Nc3 Nb6 11.Nb5=) 6...Bd6 7.cd5 cd5 8.Nc3 Ne7 9.d4 e4 10.Nd2 Nb6 11.Nb5=; B) 5...Nb6 6.d4 (6.Be2 e5 7.0–0 Bd6 8.Nc3 Ne7 9.e4 d4 10.Nb1 f5 11.ef5=; 6.Nc3 e5 7.Be2 Bd6 8.Rb1 Qc7 9.h3 Ne7 10.0–0 0–0 11.Re1+=; 6.Ra2 e5 7.Be2 Bd6 8.0–0 Ne7 9.Nc3 Be6 10.Ra1 0–0 11.Rb1+=) 6...e6 7.Bd3 Bd6 8.0–0 a5 9.Qe1 Ne7 10.ba5 Na4 11.Bc1=; C) 5...e6 6.c4 (6.Nc3 e5 7.Be2 Ne7 8.0–0 Nb6 9.Rb1 Be6 10.Re1 Qd6 11.b5=; 6.Nd4 Nb6 7.f4 Na4 8.Bc3 Nh6 9.Qh5 g6 10.Qh4 Nc3 11.Nc3=; 6.Be2 Bd6 7.0–0 e5 8.Nc3 Ne7 9.e4 d4 10.Nb1 Nb6 11.c3=) 6...dc4 7.Bc4 Nb6 8.Be2 Bd6 9.0–0 Ne7 10.d4 a5 11.b5+=; D) 5...a5 6.Nd4 (6.b5 e5 7.Be2 Bd6 8.Nc3 Ne7 9.0–0 0–0 10.Rb1 Nb6 11.d3+=; 6.Nc3 ab4 7.ab4 Ra1 8.Ba1 e5 9.b5 Bb4 10.Qb1 Bd6 11.Be2=; 6.Be2 ab4 7.ab4 Ra1 8.Ba1 e5 9.b5 Bd6 10.0–0 Qc7 11.h3=) 6...e5 7.Ne6 Qb6 8.b5 Ne7 9.Nc3 c5 10.Nf8 Nf8 11.Qh5=.

5.Nc3 A) 5...Nb6 6.d4 (6.Be2 e5 7.a3 a5 8.b5 e4 9.Ng1 Bd6 10.d3 Bf5 11.Bh5=; 6.b5 e5 7.Be2 cb5 8.Bb5 Bd7 9.Bd7 Qd7 10.e4 d4 11.Ne2+=; 6.a3 e5 7.Be2 Bd6 8.0–0 Ne7 9.e4 d4 10.Na2 f5 11.ef5=) 6...Bg4 7.h3 Bf3 8.Qf3 e6 9.b5 Ne7 10.Bd3 cb5 11.Bb5+=; B) 5...Qc7 6.e4 (6.Be2 e5 7.a3 Bd6 8.e4 d4 9.Na2 Ne7 10.c3 f5 11.ef5=; 6.b5 e5 7.Rb1 Bd6 8.bc6 bc6 9.e4 Ne7 10.ed5 Nd5 11.Ne4=; 6.Rb1 e5 7.b5 Bd6 8.bc6 bc6 9.e4 d4 10.Na4 f5 11.ef5=) 6...de4 7.Ne4 e5 8.a3 a5 9.b5 Nc5 10.Nc5 Bc5 11.d4=; C) 5...Rb8 6.Be2 (6.a3 e5 7.Be2 Bd6 8.0–0 Ne7 9.e4 d4 10.Nb1 f5 11.ef5=; 6.b5 e5 7.Be2 Bd6 8.0–0 Qc7 9.h3 Ne7 10.a4 0–0 11.Ba3=; 6.Nd4 Nb6 7.f4 Nh6 8.Nf3 Bg4 9.h3 Bf3 10.Qf3 e5 11.a3=) 6...e5 7.a3 b5 8.e4 d4 9.Na2 c5 10.0–0 c4 11.Re1=; D) 5...e5 6.a3 (6.b5 Bd6 7.Rb1 Ne7 8.Be2 0–0 9.0–0 Nb6 10.bc6 Nc6 11.Nb5+=; 6.Nh4 Nh6 7.a3 Nb6 8.Nf3 Bf5 9.Be2 Bd6 10.0–0 Qc7 11.h3+=) 6...Bd6 7.Be2 Ne7 8.0–0 0–0 9.e4 d4 10.Na2 Kh8 11.c3=.

5.c4 e5 (5...dc4 6.Bc4 (6.a3 Nb6 7.Qc2 e5 8.d4 cd3 9.Bd3 g6 10.0–0 Be6 11.Rd1=) 6...Nb6 7.Bb3 e5 8.a3 a5 9.ba5 Ra5 10.d4 e4 11.Nfd2+=; 5...e6 6.Qb3 (6.Nd4 Ne5 7.c5 Ng6 8.Be2 e5 9.Nb3 b6 10.Qc2 Rb8 11.0–0=; 6.c5 e5 7.d4 e4 8.Nfd2 b6 9.Be2 Rb8 10.Bc3 Be7 11.0–0=; 6.a3 dc4 7.Bc4 Nb6 8.Be2 Bd6 9.0–0 Ne7 10.d4 a5 11.b5+=) 6...Ne7 7.d4 dc4 8.Bc4 Nd5 9.e4 b5 10.Bf1 Nc7 11.a4+=) 6.cd5 (6.a3 Bd6 7.cd5 cd5 8.Nc3 Ne7 9.d4 e4 10.Nd2 Nb6 11.Nb5=; 6.b5 Bd6 7.d4 Ne7 8.de5 fe5 9.Nc3 Qa5 10.Qd2 0–0 11.Rd1=; 6.c5 a5 7.a3 ab4 8.ab4 Ra1 9.Ba1 Ne7 10.d4 e4 11.Nfd2=) 6...cd5 7.Qb3 (7.Nc3 Bb4 8.Nd5 Bd6 9.d4 Qa5 10.Nc3 Ne7 11.Rc1+=) 7...Nb6 (7...Ne7 8.Nc3 Nb6 9.d4 e4 10.Nd2 Nc6 11.a3=) 8.a4 (8.Nc3 Ne7 9.d4 e4 10.Nd2 Bd7 11.Be2+=) 8...e4 (8...Ne7 9.a5 Nd7 10.Nc3 Nb8 11.Bb5=) 9.Nd4 a6 (9...Qd6 10.Nb5 Qe7 11.a5+/–) 10.a5 Nc4 11.Bc4 dc4 12.Qc4 Qe7 13.Ba3 Qf7 14.Qc2 f5 15.Nc3 Be6 (15...Bd6 16.d3 Qg6 17.0–0+/–) 16.Ne6 (better is 16.Ne4!? Qg6 17.Ne6 Qe6 18.Qa4 Qc6 19.Qc6 bc6 20.Ng5+–) 16...Qe6+/– 17.Qa4 Qd7 18.Qd7 Kd7 19.Nd5 Ne7?? (better is 19...Rd8+/–) 20.Nb6+– Ke6 21.Na8 g6 (21...Nd5 22.f3+–) 22.Nb6 (22.Nc7 Kd7 23.Bb2 Rg8+–) 22...Bg7 (22...Nc6 23.Rb1+–) 23.Rc1 Nd5 24.Nd5 Kd5 25.Rc7 (25.Rc7 Bf6 26.Rb7+–) 1–0. Hummel,Thomas (1915) – Steindl,Horst, 10th Forchheim Open, 2011.

5.Nd4 A) 5...Nb8 6.Bd3 (6.f4 Qd6 7.b5 e5 8.fe5 fe5 9.Nf3 e4 10.Ne5 Nf6 11.Be2=; 6.a3 e5 7.Nb3 Bd6 8.Be2 Ne7 9.Nc3 0–0 10.0–0 Be6 11.f4=; 6.Nf3 e5 7.a3 Bd6 8.Be2 a5 9.b5 e4 10.Ng1 Ne7 11.Nc3=) 6...Nh6 7.f4 Bg4 8.Be2 Be2 9.Ne2 e6 10.Nd4 Qd7 11.a3=; B) 5...e5 6.Ne6 Qb6 7.Nc3 Bb4 8.Ng7 Kf7 9.Nf5 Ke8 10.a3 Bc5 11.Rb1+=; C) 5...Nb6 6.f4 (6.Bd3 g6 7.f4 e5 8.fe5 Na4 9.Qc1 fe5 10.Nf3 Bg7 11.0–0=) 6...Nh6 7.Nf3 Bf5 8.Be2 e6 9.a3 Bd6 10.0–0 0–0 11.Nd4=.

5.Be2 A) 5...Qb6 6.b5 (6.a3 e5 7.Nc3 Bd6 8.0–0 Ne7 9.e4 d4 10.Na4 Qc7 11.c4=) 6...e5 7.Nc3 a6 8.a4 Bb4 9.ba6 ba6 10.0–0 Rb8 11.Ba3=; B) 5...Nh6 6.b5 (6.a3 e5 7.0–0 Bd6 8.c4 dc4 9.Bc4 e4 10.Nd4 Ne5 11.Be2=; 6.Nc3 e5 7.a3 Bd6 8.0–0 Nb6 9.d3 Be6 10.Rb1 0–0 11.Bc1+=; 6.0–0 e5 7.a3 Bd6 8.Nc3 Nb6 9.Ra2 0–0 10.Ra1 Qc7 11.d3+=) 6...e5 7.0–0 Bd6 8.Nc3 Qc7 9.bc6 bc6 10.e4 d4 11.Na4=; C) 5...Qc7 6.a3 (6.0–0 e5 7.b5 Bd6 8.bc6 bc6 9.Ba3 Ba3 10.Na3 Qd6 11.Nb1=; 6.b5 e5 7.0–0 Bd6 8.bc6 bc6 9.Ba3 Ba3 10.Na3 Qd6 11.Nb1=; 6.Nc3 e5 7.a3 Bd6 8.e4 d4 9.Na2 Ne7 10.c3 f5 11.ef5=) 6...e5 7.c4 dc4 8.Bc4 e4 9.Nd4 Ne5 10.Be2 Bd6 11.Nc3=; D) 5...e5 6.c3 (6.b5 Bd6 7.0–0 Ne7 8.Nc3 0–0 9.a4 Nb6 10.d3 Be6 11.a5+=; 6.Bc3 Bd6 7.0–0 Qc7 8.Ne1 Ne7 9.Bh5 g6 10.Be2 0–0 11.a3+=; 6.a3 Bd6 7.0–0 Qc7 8.h3 Ne7 9.c4 dc4 10.Bc4 a5 11.Qb3=) 6...Ne7 7.0–0 Ng6 8.d3 Be7 9.Nbd2 0–0 10.a3 a5 11.Qb3=.

4.b5 e5

5.bc6 bc6 6.Nf3 =+.

5.d4 A) 5...e4 6.c4 (6.Nd2 cb5 7.Bb5 Qb6 8.a4 a6 9.Bd7 Bd7) 6...cb5 (6...Ngf6 7.c5 Be7 8.Nc3 Qc7 9.Rb1 0–0) 7.cb5 Ngf6 8.Qd2 Bd6 9.Ba3 Bc7; B) 5...Bd6 6.c4 Ngf6 (6...e4 7.Nc3 Ngf6 8.bc6 bc6 9.Qa4 Qb6; 6...Ne7 7.cd5 Nd5 8.e4 Bb4 9.Nd2 N5f6) 7.cd5 cd5 8.de5 Ne5 9.Nd2 Bg4.

5.Be2 A) 5...Bd6 A1) 6.Nc3 Ngf6 (6...Qc7 7.bc6 bc6 8.Rb1 Ngf6 9.Nf3 Rb8) 7.bc6 bc6 8.Nf3 Rb8 9.Rb1 Qc7; A2) 6.Nf3 Ngf6 7.Nc3 c5 8.0–0 e4 9.Ne1 Qc7; B) 5...a6 6.Nf3 (6.bc6 bc6 7.Nf3 Bd6 8.Nc3 Ngf6 9.Rb1 Rb8; 6.ba6 ba6 7.Nf3 Bd6 8.Nc3 Ngf6 9.Rb1 0–0) 6...Bd6 (6...e4 7.bc6 bc6 8.Nd4 Qb6 9.Nb3 Ngf6) 7.a4 Qc7 8.Nc3 Ngf6 9.h3 0–0; C) 5...Ngf6 6.Nf3 Bd6 7.Nc3 c5 8.0–0 e4 9.Ne1 Qc7.

5.Nf3 Bd6 A) 6.Nc3 Ngf6 (6...Qc7 7.Rb1 Ngf6 8.bc6 bc6 9.Be2 0–0) 7.Be2 0–0 8.0–0 c5 9.d3 Qc7; B) 6.Be2 Ngf6 (6...Qc7 7.bc6 bc6 8.Ba3 Ngf6 9.Bd6 Qd6) 7.Nc3 c5 8.0–0 0–0 9.d3 Qc7.

5.Nf3 e4 6.Nd4 (6.bc6 bc6 7.Ne5 Qf6 8.Nd3 Qd6 9.Ba3 c5; 6.Ne5 Ne5 7.Be5 Qg5 8.Bf4 Qf6 9.Nc3 Bb4) 6...Ngf6 (6...c5!? 7.Nf5 (7.Nb3 Ngf6 8.d3 ed3 9.cd3 Qb6) 7...Ndf6+= 8.Ng3 Bd6 9.Be2 Nh6) 7.bc6+= bc6 8.Nc6 Qc7 (8...Qb6 9.Bf6 Nf6) 9.Nd4 Be7 (9...Rb8 10.Nb5 Qb7 11.Bd4+=) 10.Nc3+/– 0–0 11.Be2 (11.Nf5 Qd8+/–) 11...Re8 12.Ncb5 Qd8 (12...Qb6 13.Nf5+/–) 13.Nc6 a6?? (better is 13...Qb6 14.Ne7 Re7+/–) 14.Nd8+– Rd8 15.Nd4 Ne5 16.h3 a5 17.0–0 g6 18.f4 Nc4 19.Bc3 Bd6 20.Bc4 dc4 21.Nc6 Rd7 22.Bf6 a4 23.Qe1 Bb7 24.Ne5 Be5 25.fe5 Ra6 26.Qh4 h5 27.Qg5 Rd2 28.Qh6 Rc2 29.Qg7 1–0. jammboy – pieeater, ChessWorld.net, 2009.

4.c4 dc4

5.Bc4 Nb6 6.Bb3 e6 (6...Nf6 7.Ne2=) 7.a3 Qg5 (7...Nf6 8.d3=) 8.Qf3 (8.Nf3 Qg4+=) 8...Qd8 9.Ne2 Nd7 (9...a5 10.ba5 Ra5 11.0–0=) 10.0–0+= Nh6 (10...Ngf6 11.d3+=) 11.Nbc3 (11.d3+=) 11...f5? (11...Ne5!? 12.Qh5 Nd3=) 12.Be6 (12.Nd4!? Ne5 13.Qh5 g6 14.Qe2+/–) 12...Ne5+= 13.Qg3 Ng6 (13...Be6!? 14.Qe5 Qd6+=) 14.Bc8 Rc8 15.d4 (15.Nd4 Bd6 16.f4 c5 17.bc5 Bc5+/–) 15...b5 (15...Bd6 16.f4+/–) 16.e4+– Bd6 17.e5 Bf8 18.Rfd1 Ne7 19.Nf4 Nd5 20.Nfd5 cd5 21.Nb5 a6 22.Nd6 Bd6 23.Qg7 (23...Rg8 24.Qh6+–; 23.ed6?! 0–0 24.Qe5 Ng4 25.Qd5 Kh8+–) 1–0. Wall,Bill – Hubbard,Derrick, Palm Bay, FL, 2003.

5.Bc4 e5 6.b5 cb5 7.Bb5 a6 8.Be2 (8.Bd7!? Qd7 9.Be5+–) 8...Ngf6=+ 9.Nf3 e4 10.Nd4 Nc5 11.0–0 Bd6 12.f4 Ng4?? (better 12...0–0=+) 13.Bg4+– Qh4 (13...0–0+–) 14.Bc8 Bf4 (14...Rc8 15.Nf5 Qd8 16.Ng7 Kd7+–) 15.Rf4 0–0 16.Rh4 (16.Rh4 Rfc8 17.Nf5+–) 1–0. BeepBeepImAJeep (2595) – Demostene26, lichess.org, 2016.

5.Bc4 e6 6.Nf3 Ngf6 7.Qb3 b5 8.Be6? (better 8.Be2!?=) 8...fe6–/+ 9.Qe6 Qe7 10.Qc6 Rb8 11.Be5 Bb7 12.Qb5 a6 13.Qa4 Bf3 (13...Rc8!? 14.Bc3 Kf7–/+) 14.Bb8=+ Bg2 15.Rg1 Bf3 16.Rg3 Be4 17.a3 (better 17.Ba7 Kf7 18.Bc5 Nc5 19.bc5 Qc5 20.Nc3=) 17...Qd8 (better 17...Qe6 18.Ba7 Nh5–/+) 18.Be5+= Kf7 (18...Qc8 19.Bf6 Bc2 20.Qa5 Nf6 21.Nc3+=) 19.Bf6+– Nf6 (19...Kf6? 20.Nc3 Bb7 21.b5+–) 20.Qa6 Be7 (20...Qd7 21.Qc4 Bd5 22.Qd4+–) 21.Nc3 Bd3 22.Qa7 Rf8 23.0–0–0 (23.Rc1 Kg8+–) 23...Kg8 (23...Qd6 24.Kb2+–) 24.Rdg1 g6 25.Qd4 Qd4 26.ed4 Bf5 27.Rf3 Be6?? (better 27...Kf7+–) 28.Re3+– Kf7 (28...Bb4 29.ab4 (worse 29.Re6 Ba3 30.Kc2 Rf7+–) 29...Bf5 30.Re5+–) 29.Rge1 1–0. DEFFM – GMDirham, freechess.org, 2019.

5.Bc4 e6 6.Nf3 Ngf6 7.b5 c5 (7...cb5 8.Bb5 a6 9.Be2=) 8.a4 b6 9.0–0 Be7 10.Nc3 Bb7 11.d3 0–0 12.e4 Ng4 (12...Bd6 13.Qe2=) 13.h3 Nge5 14.Bb3 (14.Ne5 Ne5 15.Qe2 Bf6=) 14...Nf3 15.Qf3 Bf6 16.Qg3 Be5 17.f4 Bd4 18.Kh1 e5 (18...Qf6!?=+) 19.fe5 Ne5 20.Nd1 (20.Rf5 Qd6=) 20...c4 (20...Bb2 21.Nb2 Qd4=+) 21.Bd4 (21.dc4!? Rc8 22.Bd4 Qd4 23.Nc3 Nc4 24.Rad1=) 21...Qd4=+ 22.dc4?? (22.Ne3 A) 22...cb3?? 23.Nf5 Nf3 24.Nd4 (24.Qf3?! Qe5+–; 24.gf3?! Qf6+=) 24...Nd4 25.Rab1+–; B) 22...Qd3 23.Qe5 Qe3 (23...cb3? 24.Nf5 f6 25.Qe6 Kh8 26.Qe7+–; 23...Qb3? 24.Nf5 f6 25.Qe6 Kh8 26.Qe7+–) 24.Bc4 Qe4 (24...Be4? 25.Kh2+–) 25.Qe4 Be4=+) 22...Nc4 (better 22...Qa1 23.Kh2 Qb1–+) 23.Qc7 (better 23.Rc1!? Nd2 24.Rf7 Nb3 25.Rf8 Rf8 26.Qb3 Kh8 27.Nc3 Be4 28.Ne4 Qe4 29.Qf7+=) 23...Qe4–/+ (23...Qa1 24.Bc4 Rab8 25.Nc3+–) 24.Rf3?? (better 24.Ra2 Rac8 25.Qg3–/+) 24...Qe1–+ 25.Kh2 Bf3 26.Bc4 Bd1 27.Bb3 Rad8 28.Bf7 (28.Rd1 Rd1 29.Bd1 Qd1–+) 28...Kh8 29.Bb3 (29.a5 ba5 30.Ra2 Rc8–+) 29…Rd3 (29...Rd3 30.Rd1 Rd1 31.Bd1 Qd1–+) 0–1. GuestMMFQ – Jinjax, freechess.org, 2017.

5.Bc4 Ngf6 6.Nf3 (6.Qb3 e6 7.Nf3 Nb6 (7...Bd6 8.0–0 a5 9.ba5 Qa5 10.d4 Nd5) 8.Be2 Bd6 9.0–0 0–0 10.a3 a5) 6...e6 (6...Nb6 7.Be2 e6 (7...e5 8.Be5 Bb4 9.0–0 0–0 10.Qc2 Ng4) 8.a3 Bd6 9.Be5 a5 10.Bd6 Qd6) 7.a3 (7.Qb3 Nb6 (7...Bd6 8.0–0 Qe7 9.a3 a5 10.b5 Nc5) 8.Be2 Bd6 9.0–0 Nbd5 10.b5 0–0) 7...Be7 (7...b5 8.Be2 a5 9.Qc2 Bb7 10.ba5 Ra5; 7...Bd6 8.0–0 0–0 9.Qb3 e5 10.d3 Qe7; 7...a5 8.b5 Nb6 9.Be2 Bd7 10.Nc3 Bd6; 7...Nb6 8.Be2 Bd6 9.Be5 Be5 10.Ne5 Nbd7) 8.0–0 0–0 (8...Nb6 9.Be2 0–0 10.Bf6 Bf6) 9.d4 (9.Qc2 a5 10.b5 cb5) 9...a5 10.b5 (10.ba5 Qa5) 10...Nb6 11.Bd3 Bd7 12.Nc3 Nbd5 13.Nd5 Nd5 (13...cd5 14.Ne5+=) 14.bc6 Bc6 15.Ne5 Rc8 16.Nc6 Rc6 17.Rc1 Rc1 18.Qc1 Qd7 19.Qc2 h6 20.Rc1 Bd6 (20...b5 21.e4 Nf4 22.Bf1+=) 21.g3 Ne7 22.Qc3 Qa4 23.Bc2 Qb5 24.a4 Qg5 (24...Qb6 25.Qd3 Ng6 26.Ba3+=) 25.Be4 (25.f4 Qg4+/–) 25...Bb4+= 26.Qc7 (26.Qd3+=) 26...Nd5 (better is 26...b5!?=) 27.Qb7+/– Bd2 (27...Qh5 28.Qb5+/–) 28.Rc8+– Nb4?? (better is 28...Bb4+–) 29.Bh7! Kh7 30.Rf8 Nd3 (30...Qg6+–) 31.Qe4 (31.Qe4 Qg6 32.Qg6 Kg6 33.Ba3+–) 1–0. Raue,Thorsten (1830) – Witt,Sebastian (1830), Verbandsklasse B Muensterland, 2003.

5.Bc4 e5

6.b5 cb5 7.Bb5 a6 8.Bd7 Bd7 9.Be5 Bc6 +=.

6.b5 cb5 7.Bb5 f6 8.d4 Bb4 9.Nd2 Qa5 =.

6.b5 cb5 7.Bb5 f6 8.Nf3 a6 9.Be2 e4 10.Nd4 Nc5 11.0–0 Bd6 12.f3 Qc7 13.h3 Ne7 14.Nc3+= ef3 15.Bf3 Nd3 16.Ba3 Ba3= 17.Qa4 (17...Bd7 18.Qa3=). pcmvr (1810) – Mario Cruz (1875), internet, 2005.

6.b5 e4 7.bc6 bc6 8.Qc2 =.

6.Nf3 Bd6 7.a3 Ngf6 8.Ng5 0–0 9.Nc3 Nb6 10.Bb3 Qe7 (10...Bf5 11.d4=+) 11.0–0 Bf5 12.f4 Bg6 13.f5 Bh5 14.Qe1 g6 15.Nge4 Ne4 16.Ne4 gf5 17.Rf5 Bg6 18.Nf6 Kh8 19.Rf1 Nd7 20.Nd7 Qd7 21.Qg3 f6 22.Qh4 Qe7 23.e4 Bc7 24.Rf3 Rad8 25.d3 Rd6 26.Rg3 Bf7 27.Bc2 Rg8 28.Rf3 Be8 29.Raf1 Bg6 30.Rh3 Qg7 31.Bb3 Rgd8 32.Rff3 Be8? 33.Be5!!+– fe5 34.Rf8!! 1–0. Andrenko,Irina – Pogrebinskaja,Marina, Championship UKR g–14 semifinal, 2003.

6.Nf3 e4 7.Ne5 Ne5 8.Be5 –/+.

4.c4 e5

(--> 1.b4 c6 2.c4 d5 3.e3 e5 4.Bb2 Nd7).

5.a3 Bd6 6.cd5 cd5 7.Nf3 Ngf6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6 7.cd5 cd5).

5.a3 Ngf6 6.Nf3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6).

5.cd5 cd5 6.a3 Ngf6 7.Nf3 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nd7 5.e3 Ngf6 6.c4 c6 7.cd5 cd5).

4.c4 e6

5.Nf3 Bb4?? 6.Bg7+– Be7 (6...dc4 7.Bh8 b5 8.Bc3 Bc3 9.Nc3+–) 7.Bh8 Bf6 (7...Ngf6 8.d4+–) 8.Bf6 Qf6 (8...Ngf6 9.d4+–) 9.Nc3 (9.d4 Ne7+–) 9...Nb6 10.c5 Nd7 11.d4 e5 12.de5 Ne5 13.Be2 (13.Ne5 Qe5 14.Qd4 Qe6+–) 13...Nh6?? (better is 13...Nf3 14.Bf3 Qc3 15.Ke2 Qc5+/–) 14.Ne5+– Qe5 15.Qd4 Qg5 16.0–0–0 Bf5 17.h4 Qg8 18.e4 Be6 19.ed5 0–0–0 20.d6 Nf5 21.Qe5 Qg6 22.Bd3 Qh6 23.Kb2 Ng7 24.Ne4 Bd7 25.Nf6 Ne6 26.g4 Nc5 27.Bh7 Ne6 28.g5 Qf8 29.Rh3 b6 30.Rc3 Nc5 31.Rc5 bc5 32.Qc5 Kb8 33.Be4 Qh8 34.Rd3 a6 35.Rb3 Ka8 36.Bc6 (36.Bc6 Bc6 37.Qc6 Ka7 38.Qb7) 1–0. Trokenheim,Marek – Francisco,Norman, Varberg (Stockholm) SK SWE, 1983.

5.Nf3 Ne7 6.b5 f6 7.a4 Ng6 8.Be2 Bd6 9.0–0 0–0 10.d4 f5 (10...dc4 11.bc6 bc6 12.Nbd2+=) 11.Nc3 Qf6 Black prepares the advance f4 12.Qb3 f4 (12...Nh4 13.Ba3 Nf3 14.Bf3 Ba3 15.Ra3+–) 13.e4+– de4 (13...Qf7!?+–) 14.Ne4+– Qe7 15.Nd6 Qd6 16.Ba3 Qc7? (better 16...c5+–) 17.Bf8+– Ndf8 18.Rad1 Bd7 (18...cb5 19.ab5 a6 20.b6+–) 19.d5 (19.c5 Rd8+–) 19...Re8 (19...cd5 20.cd5 ed5 21.Ng5+–) 20.bc6 bc6 21.d6 Qc8 (21...Qa5 22.Bd3+–) 22.c5 Kh8 23.Ng5 Kg8 24.Bc4 (24.Ne4 Ne5+–) 24...Qd8 25.Nf3 Qf6 (25...Qa5 26.Qa3+–) 26.Rfe1 h5 (26...Kh8 27.Qb7+–) 27.Qd3 (27.Qb7 a5+–) 27...Kh7 (27...Rb8 28.Qe4+–) 28.Qd4 e5 29.Qd2 (29.Qe4!? Kh6+–) 29...Bg4 30.Be2 e4 31.Nd4 f3 (31...e3 32.Qc2 ef2 33.Kf2 Qh4 34.Kg1+–) 32.Bf3! ef3 Exploits the pin. (32...Qf3 33.gf3) 33.Re8 Annihilates a defender: e8 33...fg2 34.Rde1 Nh4 (34...Nd7 35.Nc6 (35.Kg2?! Nc5 36.Kg1 Nf4+–) 35...Nc5 36.Ne5+– (worse 36.Na7 Nh4 37.R8e3 Qf5+–)) 35.R1e3 Nfg6 36.Qd3 Kh6 37.h3 (37.Nc6 Bd7 38.Qd2 Qf4+–) 37...Nf4 (37...Bd7 38.Ra8+–) 38.Qe4 Nh3 (38...Qd4 39.Qd4 (39.hg4?? Qd1 40.Re1 Qe1 41.Qe1 Nf3) 39...Ne2 40.Re2 Nf3 41.Kg2 Nd4 42.hg4+–) 39.Rh3! Bh3 40.Qe3 (better 40.Rh8 Kg5 41.f4 Qf4 42.Rh5 Kh5 43.Qf4 g6+–) 40...g5 (40...Kh7 41.Re5 Bg4+–) 41.Qh3 Ng6 (41...Qd4 42.Qe6 Ng6 43.d7 Qd1 44.Kg2+–) 42.Qe3 (42.Nf5 Qf5 43.Qf5 h4 44.Rg8 Kh5 45.Rg6 h3 46.Qg5) 42...Nf4 43.Re4 (43.d7 a6 44.d8Q Qd8 45.Rd8 h4 46.Rh8 Kg7 47.Qe5 Kg6 48.Rg8 Kh5 49.Qg5) 43...h4 (43...Qf7 44.Ne6 Ne2 45.Qe2+–) 44.Rf4! gf4 Threatening mate: fxe3 (44...Qf4 45.Qf4) 45.Qe6 Kg5 (45...Kg7 46.Nf5 Kg6 47.Nh4 Kg7 48.Nf5 Kg6 49.Qf6 Kf6 50.d7 Kf5 51.Kg2+–) 46.Qf6 (better 46.Nf3 Kg6 47.Qe8 Kf5+–) 46...Kf6 47.Nf3 (better 47.Nc6 Ke6 48.Ne5 Ke5 49.d7+–) 47...Kf5 (47...h3 48.Ng5!+–) 48.Nh4 (48.d7 Ke4 49.Nh4 Kd4+–) 48...Ke4 (48...Ke6+–) 49.Ng2 Kd5 50.Nh4 (better 50.d7 Kc5 51.d8Q f3+–) 50...Kc5 (50...Ke6 51.Ng6 f3 52.Kh2+–) 51.Nf5 (51.d7 Kb4+–) 51...Kb4 (51...Kb6+–) 52.d7 Ka4 53.d8Q Kb5 54.Qe7 (54.Qb8 Ka6 55.Nd4 Ka5 56.Nc6 Ka6 57.Qb4 f3 58.Nb8) 54...c5 55.Qd6 Kb4 56.Nd4 (56.Nd4 a6 57.Ne6 a5 58.Qc5 Kb3 59.Nd4 Kb2 60.Qc2 Ka3 61.Qb3) 1–0. BeepBeepImAJeep (2655) – wzn (2390), lichess.org, 2016.

5.Nf3 f5 6.b5 Ngf6= 7.a4 Be7 8.Be2 0–0 9.0–0 Re8 10.d4 Nf8 11.Nc3 Ng6 12.Ne5 Ne5 13.de5 Nd7 14.f4 (14.bc6 bc6 15.cd5 Ne5+=) 14...Bc5 15.Qc1 Qb6 16.Nd1 Nf8 (better 16...dc4!? 17.bc6 Qc6=) 17.a5+– Qd8? (17...Qc7+–) 18.Bd4?? (better 18.cd5!? Bb4 19.dc6 bc6 20.Qc6+–) 18...Be7 (18...Bd4 19.ed4 dc4 20.Qc4 cb5 21.Qb4=) 19.bc6 bc6 20.cd5 cd5 Opening the b–file gets White a lot of play. 21.Nc3 Bd7 (21...a6 22.Qd2+=) 22.a6 Rc8 (22...Bh4+–) 23.Qb2 (23.Ba7 Rc7 24.Bd4 Qa8+–) 23...Qc7? (23...Bc5 24.Rab1+=) 24.Qa2 (24.Rfc1!? Bc5 25.Nd5 Bd4 A) 26.Rc7? Bb2 27.Rb1 Be5 28.fe5 ed5 29.Ra7 Re5–+; B) 26.Qd4?! Qc1 (26...ed5?? 27.Rc7 Rc7 28.Bf3+–) 27.Rc1 Rc1 (27...ed5 28.Rc8 Rc8 29.Qa7+–) 28.Kf2 ed5=; C) 26.ed4+–) 24...Bc5 (24...Bc6 25.Nb5 Bb5 26.Bb5+=) 25.Nb5 (25.Rfc1 Qd8+–) 25...Qb6 (25...Bb5 26.Bb5 Re7 27.Qd2+=) 26.Bc5 Qc5 27.Nd4 (27.Nd6 Qe3 28.Kh1 Rc3+–) 27...Rb8 28.Qa3 Rec8 (28...Qa3 29.Ra3 Rec8 30.Kf2+=) 29.Qc5+– Rc5 30.Rfb1 Rcc8 (better 30...Rb1!? 31.Rb1 Bc8+–) 31.Rb7+– Kf7 (31...Ra8 32.Bb5 Bb5 33.Nb5+– (33.Rb5?! g5+–)) 32.Rab1 (32.Ra7 Ra8 33.Rb7 Rcb8+–) 32...Rb7 33.Rb7 (33.ab7?! Rb8+–) 33...Ke8 34.Ra7 The passed pawn on a6 quickly leads to threats 34...Kd8 35.Bb5 Rc7 (35...Bb5 36.Nb5 Nd7 37.Nd4+–) 36.Ra8 (36.Rc7!? Kc7 37.Bd7 Nd7 38.Ne6 Kb6 39.Ng7 Ka6+–) 36...Rc8 37.Rc8 Kc8 38.Kf2 (better 38.Bd7 Nd7 39.Ne6+–) 38...Bb5 39.Nb5 Nd7 (39...g6 40.h3+–) 40.Ke2 (40.a7!? Nb6+–) 40...Nc5 41.a7 Threatening mate... how? 41...Kb7 42.Kd1 Ne4 (better 42...Ka8+–) 43.Nc7!! Ka7 (43...Kc7 Theme: Deflection from a8 44.a8Q) 44.Ne6 Nf2 (44...g6+–) 45.Ke2 Ng4 46.Ng7 h5 (46...Nh6 47.e6 Ng8 48.Nf5+–) 47.Nh5 Nh2 (47...Kb8+–) 48.Ng7 (better 48.e6+–) 48…Ng4 (48...Ng4 49.Kd3 Kb6+–). BeepBeepImAJeep (2625) – Alicia75 (2240), lichess.org, 2016.

5.Nf3 Ngf6 6.a3 Be7 7.Qc2 Nf8 8.Nc3 Bd7 9.d4 a6 10.c5 Ng6 11.Bd3 a5 12.0–0 Ng4 13.h3 Nh6 14.Rfe1 0–0 15.Na4 Be8 16.Nb6 Ra7 17.e4 Nf4 18.Bf1 f5 19.ed5 ed5 20.g3 (20.Bc1 Ng6+–) 20...Nh5 21.Bd3 g6?? (21...Bg6 22.Ne5+/–) 22.Kg2 (22.Re7 Qe7 23.Nc8+–) 22...Nf7 (22...Bf6 23.ba5 Bg7 24.Re2+/–) 23.Qe2 (better is 23.Re7!? Qe7 24.Nc8+–) 23...Bf6+/– 24.b5 Ng7 25.a4 Ng5 26.Ne5 Ne4 27.f3 Ng5 28.h4 Nf7 29.f4 Nh6 30.Bc3 Bh4? 31.gh4+– Nh5 32.Qf2 Ng4 33.Ng4 fg4 34.Bd2 g3 35.Qf3 Qh4 36.Rh1 Nf4 37.Bf4 Qf4 38.Qf4 Rf4 39.Rae1 Bf7 40.Rhf1 Rd4 41.Re7 Rd3 42.Rff7 cb5 43.Rg7 Kh8 44.Rh7 Kg8 45.Rhg7 Kf8 46.Nd7 1–0. Lenda,Lukasz (1925) – Marszalek,Jakub (1720), IV MFSz Mielno Poland, 2008.

5.Nf3 Ngf6 6.a3 Be7 7.Be2 0–0 8.0–0 Ne4 9.d3 Nd6 10.Nbd2 dc4 11.dc4 c5 12.Qc2 Bf6 13.Rfd1 Bb2 14.Qb2 Qb6 15.b5 f6 16.Bd3 Rd8 17.a4 a5 18.Ne4 Ne4 19.Be4 Nf8 20.Rd2 Bd7 21.Rad1 Be8 22.Nh4 Ng6 23.Ng6 Bg6 24.Bg6 hg6 25.f3 Kf8 26.Kf2 Ke7 27.Ke2 Rd2 28.Qd2 Rd8 29.Qd8 Qd8 30.Rd8 Kd8 31.f4 Kd7 32.Kf3 Kd6 33.Kg4 Ke7 ½–½. De Kruif,K (2060) – Van Hoek,W (1925), 33rd Fortis Open, Guernsey GCI, 2007.

5.Nf3 Ngf6 6.b5 c5 7.a4 b6 8.Nc3 dc4 9.Bc4 Bb7 10.Qc2 g6 (10...Bd6 11.Be2=) 11.Rd1 Bg7 12.Ne2 0–0 13.Ng3 Qc7 14.h4 h5 15.Be2 Rac8 16.0–0 e5 17.Ng5 Rfe8 Black prepares e4 18.Bc4 Re7? (18...Bd5 19.f4 Bc4 20.Qc4+/–) 19.f4 (better is 19.Qg6! Nf8 20.Qc2+–) 19...e4 20.Qb3 Rf8 21.Ne2 Ng4? (better is 21...Qb8!?+=) 22.Bg7+– Kg7 23.Nc3 (better is 23.Bf7!? Qd6 24.Be6+–) 23...Qd6 24.g3 (24.Bd5 Bd5 25.Nd5 Ree8+=) 24...Ndf6= 25.Kg2 Nh6 26.Kf2 Qd7 27.Rh1 Nh7 (27...Nf5 28.Rhe1+=) 28.Be2 f6 29.Nh7 Kh7 30.Qc2 Qd6 31.Nb1 Bd5 32.Rc1 Rd8 33.Bc4 (33.Nc3 Bb7+=) 33...Bc4–/+ 34.Qc4. Cassens,Erhard Otto (1725) – Zimmermann,Manfred2 (1650), Pinneberg–ch, 2006.

5.Nf3 Ngf6 6.c5 b6 =.

5.Nf3 h6 6.Qb3 dc4 7.Bc4 b5 8.Be2 Bb7 9.a4 a6 10.d4 Ngf6 11.Nbd2 g6 (11...Nd5 12.e4 Nb4 13.0–0=) 12.0–0 Bg7 (12...Nb6 13.a5 Na4 14.Ba3+/–) 13.Rac1 0–0 14.h3 g5 (14...ba4 15.Qa4 a5 16.ba5 Qa5 17.Qa5 Ra5 18.Bc3+=) 15.Bd3 Nd5 16.Ne4 Qe7 17.a5 (17.Nc5 ba4 18.Qa4 Rfb8+/–) 17...Rfc8 (better is 17...Qb4!? 18.Qb4 Nb4=) 18.Nc5+/– Nc5 19.Rc5 Rc7 20.Rfc1 Rd8 21.Bb1 f5 22.Ba2 (22.e4 Nf4 23.Kh2 g4+/–) 22...g4 (22...Bf8!?+=) 23.hg4+/– fg4 24.Nd2 (24.Nh2 h5+/–) 24...Rf8 25.g3 (25.e4 Nf4 26.Qe3 Rd7+=) 25...Qf6+= 26.Rf1 h5? (better is 26...Rcf7+=) 27.e4+– Ne7?? (better is 27...Qh6 28.Rc2 Rcf7 29.ed5 ed5+–) 28.Qe6 Qe6 29.Be6 Kh7 30.Rh5 Bh6 31.Bg4 Rg8 32.f3 Ng6 (32...Bc8 33.Bc8 Nc8 34.g4+–) 33.Bf5 Bc8 34.g4 Bf5 35.ef5 (better is 35.g5 Kg7 36.ef5+–) 35...Nf4 36.Rh2 Nd5 (36...Nd3 37.Bc3 Rf7 38.Ne4 Rf5 39.Bd2+–) 37.Ne4 Ne3 (37...Kg7 38.g5 Bg5+–) 38.Nf6 Kg7 39.Ng8 (better is 39.d5 Nf1 40.d6 Ra8 41.Ne4 Kf8 42.Rh6 Rg7 43.Kf1 Rd8+–) 39...Nf1 (39...Bf4 40.d5 Kg8 41.Rh8 Kf7 42.Re1 cd5 43.Rh7 Kf8 44.Rc7 Bc7 45.Re3+–) 40.Rh6 Ne3 (40...Nd2 41.d5 Kg8 42.Rh8 Kf7 43.Rh7 Ke8 44.Rc7 cd5 45.Kg2+–) 41.Rg6 Kf7 (41...Kf8 42.Nh6 Rh7 43.Rc6+–) 42.Nf6 (better is 42.Nh6 Ke8 43.f6 Rf7 44.Rg8 Rf8+–) 42...Nc4 (42...Nd5 43.g5 Nb4 44.Ba3+–) 43.Bc3 Ne3 44.Ne4 Nd5 45.Kf2 Rc8 (45...Ke8 46.Re6 Kf7 47.Bd2+–) 46.Nd6 (46.Nd6 Kf8 47.Nc8 Nc3 48.Rf6 Kg7 49.Rc6+–) 1–0. katchum (2525) – beammeupscotty (2100), net–chess.com, 2012.

4.c4 Ngf6

(--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 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.d4 e5

5.a3 Bd6 6.de5 Be5 7.Ra2 =+.

5.a3 Bd6 6.de5 Ne5 7.Nf3 =.

4.d4 Ngf6

5.Nd2 e6 6.a3 Be7 7.c4 0–0 8.Ngf3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0–0 6.c4 c6 7.d4 Nbd7 8.Nbd2).

5.Nd2 e6=+ 6.b5 Qb6 7.a4 a6 (7...Bd6 8.a5 Qc7 9.Ba3=+) 8.a5 Qd8 9.b6 c5 10.Ngf3 cd4 11.ed4 Bb4 12.c3 Bd6 13.Bd3 0–0 14.0–0 Re8 15.Re1 e5 16.de5 Ne5 17.Ne5 Be5 18.Qc2 (18.Qf3 Bg4 19.Qe3 Bh2 20.Kh2 Re3 21.Re3 Qd7–+) 18...Bd7 (18...Qd6 19.Nf3+=) 19.Nf3 Bd6 20.c4 dc4 21.Bc4 (21.Re8 Qe8 22.Bc4 Ne4+=) 21...h6 (21...Rc8!?=) 22.Qb3 Rf8 (better is 22...Re7!?+/–) 23.Rad1+– Bc5? (better is 23...Ne8+–) 24.Ne5 Qc8 25.Bf7 Rf7 (25...Kh8 26.Ng6 Kh7 27.Bf6 gf6+–) 26.Qf7 Kh7 27.Nd7 (27...Bf2 28.Kf2+–) 1–0. Labahn,Thomas – Hofmann, Gersfeld Germany, 1989.

5.Nf3 e5 6.a3 e4 =+.

4.Nf3 e5

5.a3 a5 6.h4 (better is 6.Ne5 Ne5 7.Be5+=) 6...ab4=+ 7.ab4 Ra1 8.Ba1 Bb4 9.Ng5? (better is 9.Ne5 Ngf6 10.Bd4=+) 9...Ngf6–+ 10.Bd3 h6 11.Nf3 e4 12.Be4 (12.Bf6 Nf6 13.Be2 ef3 14.Bf3–+) 12...de4 13.Nd4 0–0 14.Nf5 Nc5 15.Ng3 Bg4 (15...Be6 16.Bc3 Bc3 17.Nc3–+) 16.f3? (16.Bf6 Bd1 17.Bd8 Bc2 18.Be7 Nd3 19.Ke2 Be7 20.Ne4–+) 16...Qd6 17.Nf1 ef3 (17...Bf5 18.Bc3 Bc3 19.Nc3–+) 18.gf3 Bh5 19.Rg1 Re8 20.c3 (20.Bc3 Qf4 21.Qe2 Bf3–+) 20...Nd3 21.Ke2 Bf3! 22.Kf3 Qd5 23.Ke2 Qh5 24.Kd3 Qd1 25.cb4 Qb1 26.Ke2 Qa1 27.Kf2 Ne4 28.Ke2 Nd2! 29.Kd2 (29.Nd2 Qg1) 29...Qb2 30.Kd3 Rd8 31.Ke4 Qf2 32.Rh1 Qg2 33.Ke5 Qf3 34.Rg1 (34.e4 Qf6) 34...Rd5 0–1. Reichelt,Ben – Tiedemann,Joern, remoteschach.de, 2002.

5.a3 Bd6 6.d4 e4 7.Ne5=+.

5.Ne5 Ne5 6.Be5 Nf6 7.a3 Bd6 8.Bb2 0–0 9.Be2 Bf5 10.0–0 a5 11.b5 cb5 12.Bb5 Qb6 (12...Bh2 13.Kh2 Ng4 14.Kg3=) 13.a4 Rac8 (better 13...Qd8+=) 14.d4?? (better 14.Bf6 gf6 15.Bd3+–) 14...Bc2 (14...Bh2 15.Kh2 Ng4 16.Kg1 Qh6 17.Qg4 Bg4–+) 15.Qe2=+ Bg6 16.Nc3 Bb4 17.Rac1 Ne4?? (17...Qe6 18.Nb1=) 18.Na2?? (better 18.Nd5!? Qd6 19.Nb4 Qb4 20.Kh1+–) 18...Qd6 (18...Bd2 19.Rc8 Rc8 20.Qd1=) 19.f3 Nf6 20.Bd3 Bd3 21.Qd3 Qd7 22.Nb4 ab4 23.Qb3 Rc1 24.Rc1 Qd6 (24...Ra8 25.Qb4 Ra4 26.Qb6=) 25.Rc5+– Re8 26.a5 (26.Qb4 Qe7 27.Bc1 b6+–) 26...Qe6 (26...b6 27.ab6 Qb6 28.Bc1+=) 27.Bc1 (27.Rb5+–) 27...Qd6? (better 27...b6!? 28.ab6 Qb6+–) 28.Qb4+– Qa6 29.Qb5 Ra8 (29...Qa8 30.Bd2+–) 30.Qa6 ba6 (30...Ra6?? 31.Rc8 Ne8 32.Re8) 31.Rc6 h6 32.Ba3 Rb8 (better 32...Re8+–) 33.Ra6 Rb1 (33...Rb3 34.Be7 Nh5 35.Rd6 Re3 36.Rd8 Kh7 37.Bd6+–) 34.Kf2 Rb3 35.Be7 (35.Bd6 Rb2 36.Kg3 Ra2+–) 35...Rb2 36.Kg3 Nh5 37.Kh3 g5 (37...Re2 38.Ra8 Kh7 39.Bc5 Re3 40.a6 Nf4 41.Kg4 Ng2 42.a7+–) 38.Ra8 (better 38.Rh6 g4 39.Kg4 Ng7+–) 38...Kh7 39.a6 Kg6 (39...Ng7+–) 40.e4 (better 40.Rg8 Ng7 41.a7+–) 40...Ra2 (40...Nf4 41.Kg4 Rg2) 41.g3+– Ng7 (41...de4 42.fe4 Nf6 43.Bf6 Kf6 44.g4+–) 42.Bd6 (better 42.ed5 Nf5 43.d6 Ne3 44.Rg8 Kf5 45.Bg5 hg5+–) 42...de4 43.fe4 Ra3 (43...f5 44.ef5 Nf5+–) 44.Be5 (better 44.Ba3 f5 45.a7 g4 46.Kg2+–) 44...Ra4 (44...f6 45.Bd6 Ra4 46.a7+–) 45.Bg7 (45.a7 h5+–) 45...Kg7 46.a7 (better 46.d5 Kf6 47.d6 Ke6+–) 46...Ra6 (46...h5+–) 47.d5 f6 48.d6! Kg6 (48...Rd6 49.Rb8) 49.d7 Kg7 50.d8Q Ra7 (50...g4 51.Kh4 h5 52.Qe7 Kh6 53.Rh8 Kg6 54.Qh7) 51.Qg8 1–0. BeepBeepImAJeep (2700) – zsnorbi (2020), lichess.org, 2016.

5.Ne5 Ngf6 6.b5 c5 (6...Bd6 7.f4+=) 7.Nf3 (7.Be2 Bd6 8.f4 0–0+=) 7...Be7 (7...Bd6 8.Be2+=) 8.Be2+– 0–0 9.c4 (9.0–0 Re8+=) 9...a6 (9...dc4 10.Na3+=) 10.ba6 ba6 11.0–0 Bb7 (11...Rb8 12.Qc2+=) 12.Qc2 (12.cd5 Nd5 13.Nc3 Rb8+–) 12...Ne4 (12...dc4 13.Na3+=) 13.Nc3 (13.cd5 Bd5 14.d3 Nef6+–) 13...Nc3 14.Bc3 Nb6 (14...dc4!? 15.Rab1 Ra7+–) 15.Rab1 (15.Rfb1 Rb8 16.Ba5 Ba8 17.cd5 Bf6 18.Bb6 Rb6 19.Rb6 Qb6+–) 15...Rb8 16.Ba5 Bc6 (16...Ba8 17.cd5 Bd5 18.e4+–) 17.Ne5 Qd6 18.Nc6 (worse 18.Rb6 Rb6 19.Bb6 Qe5+–) 18...Qc6 19.Rb6 (19.Bb6 Rb6 20.cd5 Qh6+–) 19...Rb6 20.cd5 Qb7 21.Bb6 Qb6 22.Rb1 Qd6 23.Bc4 g6 (23...Bd8 24.Rb7+–) 24.Qa4 Ra8 25.Rb7 Bf8 (25...Qf6 26.Qc6 Bd6 27.g3+– (27.Ba6? Ra6 28.Qe8 Kg7–+)) 26.Qc6 Qe5 (26...Rd8 27.Qd6 Bd6 28.f4+–) 27.f4 (27.g3 Rb8+–) 27...Qa1 28.Kf2 Qc1 (28...Rd8+–) 29.Qd7 Qd2 30.Kf3 (30.Kf3 Be7 31.Qe7 Qd1 32.Kg3+–) 1–0. DEFFM – GuestNGTP, freechess.org, 2018.

5.Ne5 Ngf6 6.Nd3 Bd6+=.

5.Ne5 Ngf6 6.Nd7 Bd7 7.a3 Bd6 8.c4 Qc7? (8...dc4 9.Bc4 b5 10.Bb3+=) 9.Be2 (9.Bf6 gf6 10.cd5 cd5+–) 9...Bh2 (9...dc4 10.Bf6 gf6 11.Bc4+–) 10.cd5 Nd5 11.Nc3 (better 11.Qc2!?+–) 11...Nc3+= 12.Bc3 Be5 13.Be5 Qe5 14.d4 Qf6 15.Bf3 0–0–0 16.Rc1 h5 (better 16...Kb8!?+=) 17.b5+– (17.Bh5 g6–/+) 17...Kb8 18.bc6 Bc6 19.Bc6 bc6 20.Qf3?? (20.Rh5 Qg6 21.g4 Rh5 22.gh5 Qg1 23.Ke2 Qg4 24.Kd2 Qf5 25.Rc6 Kb7+–) 20...Rd6?? (better 20...Qf3!? 21.gf3 Kc7=) 21.Qf6 (21.Rh5 Rh5 22.Qh5 Rd5 23.Rb1 Kc7 24.Qh2 Rd6+–) 21...gf6 (21...Rf6!? 22.Rc5 g6+–) 22.Ke2 Kb7 23.g3 a5 (23...Rd5+–) 24.Rc5 Rd5 25.Rd5 cd5 26.Rc1 (26.Rh4 Re8+–) 26...Kb6 27.Rc5 Rd8 28.Kd3 (28.a4 Rd6+–) 28...f5 29.Rc1 (29.Kc2 f4 30.ef4 f6+–) 29...f6 (29...Rh8 30.f4+–) 30.Rb1 Kc6 31.Rc1 (31.a4 f4 32.ef4 f5+–) 31...Kb6+– 32.Rh1 Kc6 (32...f4!? 33.Rh5 fe3 34.fe3 a4+–) 33.Rh5 Kb6 (33...f4 34.gf4 a4+–) 34.Rf5 Kb5 (34...Rd6 35.a4+–) 35.Rf6 (35.e4 Ra8+–) 35...Ka4 36.Ra6 Ka3 (36...Rb8+–) 37.Ra5 Kb3 38.Rc5 Kb4 (38...Rf8 39.Ke2 Rd8 40.f4+–) 39.Rc3 (39.g4!? Rg8+–) 39...Ka4 (39...Rg8 40.Rc2+–) 40.Rc2 Kb4 41.Rb2 (41.g4 Rg8 42.f3 Ra8+–) 41...Ka5 (41...Ka3 42.Rb7+–) 42.Re2 (42.e4 de4 43.Ke4 Ka4+–) 42...Ka4 43.f4 Kb4 (43...Kb5 44.g4 Kc6 45.g5+–) 44.Rc2 (44.g4 Kb5+–) 44...Ka4 (44...Rg8 45.Rc5+–) 45.Rc5 (better 45.g4 Kb4+–) 45...Kb4 (45...Rg8 46.Rd5 Rg3 47.f5+–) 46.f5 (46.g4 Ra8+–) 46...Ka4 47.g4 Rg8 48.Rd5 (48.f6 Rg6 49.Rc6 Rg8+–) 48...Rg4 49.Re5 (49.f6!? Rg8+–) 49...Rg3 50.Kc4 Rf3 51.f6 (better 51.d5 Rf2 52.d6 Rd2+–) 51...Rf6 52.Rc5 Rb6 53.e4 Rb4 54.Kd5 Rb6 (54...Rb8+–) 55.e5 Rg6 (55...Rb8 56.e6 Re8 57.Kd6 Rd8 58.Kc7 Rd4 59.e7+–) 56.Rc6 (better 56.e6!? Rg7+–) 56...Rg5 57.Re6 (57.Kd6 Rg4 58.d5 Rg8+–) 57...Rf5 (57...Kb4 58.Kc6+–) 58.Rf6 Rg5 59.Ke6 Rh5 (59...Kb5 60.d5+–) 60.d5 Rh7 (60...Kb5 61.d6 Kc6 62.Rf8 Rh6 63.Ke7 Rh7 64.Rf7+–) 61.d6 (61.d6 Kb5 62.d7+–) 1–0. BeepBeepImAJeep (2670) – knightfausto (1830), lichess.org, 2017.

4.Nf3 e6

5.a3 Ngf6 6.c4 Bd6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 Nbd7 6.c4 c6).

5.c4 Bb4 6.Bg7 f6 7.a3 Qe7 (7...Bd6 8.Bh8 Nb6 9.Nd4+–) 8.Bh8 (8.ab4?! Qg7 9.cd5 ed5+=) 8...Bc5 (8...Bd6 9.d4+–) 9.Be2 (9.d4 Bd6+–) 9...Nh6 (9...dc4 10.Bc4 b5 11.Bb3+–) 10.d4 Bb6 (10...Nf7 11.Bg7 Ng5 12.Bh6+–) 11.0–0 (better is 11.Qc2+–) 11...Qf8 12.Bf6! Qf6 (12...Nf6 13.Ne5 Combination; 12...Qf6 13.Bd3 Combination) 13.Nc3 Ba5 14.Qc2 Nf5 15.cd5 ed5 16.Bd3 Nf8 (16...Nb6 17.Ne2+–) 17.Rfe1 (better is 17.Nd5!? Qf7 18.Nb4 Qf6+–) 17...Bd7 (17...Kd8 18.Rac1+–) 18.e4 (better is 18.Rab1 Rb8 19.Ne5+–) 18...de4?? (18...Nd4 19.Nd4 Qd4 20.ed5 Kd8+–) 19.Ne4 Qg6 (19...Qg7 20.Nd6 Kd8 21.Nb7 Kc7 22.Na5 Nd4 23.Nd4 Qd4 24.Rab1+–) 20.Nd6 Kd8 21.Nb7 Kc7 22.Na5 Qf6 23.d5 Nd4 24.Nd4 Qd4 25.dc6 Qd5 26.Be4 Qa5 27.cd7 Kd7 28.Red1 Ke7+– 29.Ba8 Ne6 30.Qh7 Ke8 31.Qd7 1–0. wlittle (2225) – alanwsp (1845), net–chess.com, 2004.

5.c4 f6 6.a3 b6 7.cd5 ed5 8.Nc3 Bd6 (8...Ne7 9.d4+=) 9.Nd4 Ne7?? (better 9...Bb7+=) 10.Ne6+– Kf7 11.Nd8 Rd8 12.f4 Re8 (12...Kg8 13.Qf3+–) 13.Qh5 Kf8 14.Qh7 Kf7 15.Qh5 Kf8 (15...g6 16.Qf3+–) 16.b5 Bb7 17.bc6 Bc6 18.Nb5 Bb8 (18...Bb5 19.Bb5 Red8 20.e4 Bf4 21.Bd7 Rd7 22.0–0 Bd2 23.Bf6 Be3 24.Kh1+–) 19.Nd4 Bb7 (19...Rc8 20.Ba6 Bd6 21.Bc8 Rc8+–) 20.Ne6 Kg8 21.Qe8 (21.Qe8 Kh7 22.Qe7 Kg6 23.g4 Bf4 24.Qg7) 1–0. Speedy – Macho, internet, 2017.

5.c4 Ngf6 (--> 3.e3 Nf6 4.Nf3 Nbd7 5.c4 e6).

5.Bd3 Bb4?? 6.Bg7 e5 7.Bf1+– (7.Bh8?! e4+–).

5.Bd3 Ngf6 6.0–0 (6.a3!?=) 6...Bb4–/+ 7.c3 Be7 8.Ba3 Ba3 9.Na3 Qa5 10.Nc2 h6 11.Nfd4 0–0 12.Nb3 Qc7 13.c4 Ne5 14.Qe2 Nd3 15.Qd3 a6 16.cd5 cd5 17.Rac1 b5 18.Ne1 Qd8 19.Nd4 (19.Nf3 Bb7+=) 19...Bb7 20.Nef3 Qd6 21.h3 Rac8 22.Nb3 Ne4 23.Na5 Rc1 24.Rc1 Rc8 25.Rc8 Bc8 26.Nd4 (26.Qc2 Qc5 27.Qc5 Nc5–/+) 26...Qb4 27.Nac6 Qb1?? (better is 27...Qb2 28.Ne7 Kf8 29.Nc8 Qc1 30.Qf1 Qc8–/+) 28.Qb1+– (28.Qb1 Bd7 29.Nb8+–) 1–0. pinecrest1981 – cozMc, Live Game Caissa's Web, 2004.

5.Be2 Ngf6 6.a3 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7 5.Be2 e6 6.a3).

4.Nf3 Ngf6

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

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

5.c4 e6 6.a3 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.f4 e5

5.a3 Bd6 =+.

5.fe5 Bb4?! 6.e6 Ndf6 7.ef7 Kf7 8.Nf3 =.

5.fe5 Qh4 6.Ke2 Qb4 7.Bc3 Qe7 =+.

5.fe5 Qh4 6.g3 Qb4 7.Bc3 Qe4 8.Qf3? Qc2–/+ 9.Ne2 (9.Nh3 Nh6–+) 9...Nc5 (9...Nh6 10.e6 Nc5 11.ef7 Nf7 12.Nf4–+) 10.Nd4–/+ Qg6 11.a4 (11.Bb4!?–/+) 11...Nh6–+ 12.a5 (12.Bb4 Ng4 13.Qf4 Qe4 14.Qe4 Ne4 15.Bf8 Rf8–+) 12...a6 (12...Ng4 13.Qf4 Be7 14.a6 ba6 15.e6 Ne6 16.Ne6 Be6 17.Ba6–+) 13.h3 (13.Qf4 Be7 14.Bb4 0–0–+) 13...Be7 (13...Nf5 14.Rg1–+) 14.Bb4 Nf5 15.Nf5 (15.Rg1 Nd4 16.ed4 Ne6–+) 15...Bf5 (15...Qf5?! 16.Qf5 Bf5 17.Nc3–/+) 16.Bc5 (better is 16.Nc3–+) 16...Be4 (16...Bb1?! 17.Be7 Be4 18.Qf4 Bh1 19.Bd6–/+) 17.Qg4 Qg4 (worse is 17...Bc5 18.Qg6 hg6 19.Rh2–+; 17...Bb1?! 18.Qg6 Bg6 19.Be7 Ke7 20.Be2–/+) 18.hg4 Bh1 (18...Bc5?! 19.Rh4–+) 19.Be7 Ke7 20.Nc3 Be4 (20...f6 21.ef6 Kf6 22.Na4–+) 21.d3 (21.Ne4 de4 22.Rb1 Rab8–+) 21...Bf3 (21...Bg6!? 22.Kd2–+) 22.Ra4 h5 23.g5 Rab8 24.Kf2 (24.Rf4 Bg4 25.Na4 Rhf8–+) 24...Bg4 25.Rb4 (25.e4 Be6–+) 25...c5 (25...f6!? 26.ef6 gf6 27.g6–+) 26.Rb6 Be6 27.e4 (27.Bg2 Rhd8–+) 27...Rhd8 28.Bg2 de4 29.Be4 Rd4 30.Bb7 (30.Rb1 Rb4 31.Rc1 Rd8–+) 30...Rd3 31.Ne4 Ra3 32.Bc6 Ra2 (better is 32...Rd8 33.Rb7 Kf8 34.Nc5 Ra5 35.Ne6 fe6–+) 33.Ke3 Ra3 34.Kf2 Ra2 (better is 34...Rd8 35.g6 fg6 36.Rb7 Kf8 37.Nc5 Bg4 38.Nd7 Bd7 39.Bd7 Ra5–+) 35.Ke3 Rb6 (35...Bd7 36.Rb8 Ra3 37.Kd2 Bc6 38.Nd6 Ra5 39.Nf5 Ke6 40.Ng7 Ke5 41.Nh5–+) 36.ab6–/+ Rb2 (36...Ra3 37.Kf2 Kd8 38.Nc5–+) 37.b7 Bd7 (37...Kd8 38.Nc5 Kc7 39.Be4–/+) 38.Bd5+= Be6 39.Bc6 a5 (39...Kd8 40.Nc5 Kc7 41.Be4–/+) 40.Nc5+= Kd8 (40...Bc4 41.Kd4 Be2 42.Na4=) 41.Be4 (41.g6 Kc7 42.Be8 Rc2=) 41...Bc4 42.Kd4 Bf1 43.Bd5 (43.g6 fg6 44.e6 Ke7+=) 43...Kc7 (43...Rb4 44.Kc3+=) 44.Bf7 Bg2 (44...Rb4 45.Kc3+=) 45.g6= a4 (45...Bh3 46.Bc4=) 46.Ne6 Kb7 47.Ng7 a3 48.Nf5 (48.Nh5 a2 49.Ba2 Ra2=) 48...a2 49.Ba2 Ra2 50.g7?? (better is 50.e6 Ra8 51.Ke5=) 50...Ra4–+ 51.Kc5 Rg4 52.e6 (52.Nd6 Kc7 53.Ne8 Kd8 54.Nf6 Rg7 55.Nh5–+) 52...Kc7 0–1. Senkyr,Vladimir (2200) – Vymazal,Bronislav (2330), CZE–ChT1E, 2009.

5.fe5 Qh4 6.g3 Qb4–/+ 7.Bc3 Qe4 8.Nf3 Ne5 9.Be5 Bf5?? (better is 9...Bg4 10.Bd3 Qf3 11.Qf3 Bf3–/+) 10.Bd3+– (10...Qg4 11.Bf5 Qf5 12.0–0+–) 1–0. FABOLOUS – Klaus Behrmann, ChessWorld.net, 2003.

5.Nf3 e4 6.Ne5 =+.

3.e3 e5

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

4.a3 Nf6 5.Be5 Nbd7 6.Bb2 Bd6 7.Nf3 0–0 8.d4 Re8 9.c4 Ne4 (9...dc4 10.Bc4 Nb6 11.Bd3+=) 10.Nc3 Nc3 11.Bc3 f5 (11...Nf6 12.c5 Ne4 13.Bb2+=) 12.cd5+– f4 (12...cd5!? 13.Bb5 Re6+–) 13.Qb3 fe3? (better 13...Kh8 14.dc6 bc6+–) 14.dc6 Kh8 15.cd7 ef2 16.Kf2 Bd7 17.Bd3 Bc6 18.Rae1 Bf3 19.Re8 (19.Kf3?! Qf6 20.Kg4 Qf4 21.Kh3 Qh6 22.Kg4 Qf4 23.Kh3 Qh6 24.Kg4 Qf4=; worse 19.gf3 Qh4 20.Kg2 Qg5 21.Kf1 Qh5+–) 19...Qe8 20.gf3 (20.Kf3?! Qh5 21.Kf2 Bh2 22.Rh2 Qh2+–) 20...Qh5 (20...Rd8 21.Be4 Qe7 22.Qa4+–) 21.Qe6 Rf8 22.Qe4 (22.Be4 Qh4 23.Kf1 Qh5+–) 22...Rf4 (22...b6 23.Kg2+–) 23.Qb7 Qh4 24.Ke2 Rf8 (24...Qh3 25.Re1+–) 25.Qe4 (25.Be4 Qg5 26.Re1 Qg2 27.Kd1 Qa2+–) 25...Qh5 26.Qh7! Qh7 27.Bh7 Re8 (27...Kh7 28.h4+–) 28.Kd3 (better 28.Be4+–) 28...Kh7 29.Re1 (29.h4 Bf4+–) 29...Rc8 (29...Re1 30.Be1 Bh2 31.d5+–) 30.Re6 Bf4 (30...Bh2 31.d5+–) 31.d5 Bh6 (31...Bh2 32.Bd4 Rd8 33.Ke4+–) 32.Bd4 Rd8 (32...Rf8 33.d6+–) 33.d6 (33.Ke4 Rf8+–) 33...Rd7 (33...Bf4 34.Re7 Rd6 35.Rg7 (35.Ra7?! Be5+=) 35...Kh6 36.Ra7+–) 34.Ke4 Rd8 (34...a6 35.Be5 Kg8 36.Re8 Kf7 37.Ra8+–) 35.Kd5 (35.Ba7 Rd7 36.Bc5 Bg5+–) 35...Rf8 (35...a6 36.Re7 Kg6 37.d7+–) 36.Bc5 (36.d7 Bg5 37.Ba7 Rf3+–) 36...Rf5 37.Kc6 Rf3 (37...Bg5 38.Ba7 Rf3 39.a4+–) 38.d7 (better 38.Rh6 gh6 39.d7+–) 38...Rf5 (38...Bg5 39.Re3! Be3 40.d8Q Bc5 41.bc5 Ra3 42.Kb7 Rb3 43.Ka8+–) 39.Re8 (better 39.d8Q Rf6 40.Rf6 gf6 41.Qf6 Bg7 42.Qf5 Kh8 43.Ba7 Bb2+–) 39...Rf6 (39...Bg5 40.Be7 Be7 41.Re7 Rf6 42.Kc5 Rf5 43.Kc4 Rf4 44.Kc3+–) 40.Bd6 (40.Kb7 Bg5 41.d8Q Rb6 42.Bb6 Bd8 43.Bd8 a6+–) 40...Bf4 41.d8Q Rd6 42.Qd6 Bd6 43.Kd6 Kg6 44.Ke6 (44.Ke6+–) 1–0. FeegLood (2815) – singapu85 (2660), lichess.org, 2017.

4.b5 cb5 5.Be5 (5.Nf3=) 5...Nc6 (5...b4!?=) 6.Bb5+/– f6 (6...Nf6 7.Nf3+/–) 7.Bg3 (7.Bf4+/–) 7...Bd6 (better is 7...Kf7!?+/–) 8.Qh5+– g6 (8...Kf8 9.Nf3 Nge7 10.0–0+–) 9.Qd5 Bg3 10.Qd8 Kd8 11.hg3 Bd7 (11...Nge7 12.Nc3+–) 12.Be2 Nge7 (12...Kc7 13.Nc3+–) 13.Nc3 a6 (13...Rc8 14.Rb1 Kc7 15.d4+–) 14.a3 (14.Rb1 Kc7+–) 14...Kc7 15.d4 Rhd8 16.0–0–0 Rac8 17.d5 Ne5 18.d6 Kb8 19.de7 Re8 20.Nd5 Be6 21.Rh7 Bd5 22.Rd5 Nc6 23.Rd6 Ka7 24.Nf3 Ne5 25.Ne5 fe5 26.Bd3 Kb8 27.Rd7 Ka8 28.Bg6 Rg8 29.Bf7 Rh8 30.Rh8 Rh8 31.Rd8 Rd8 32.ed8Q Ka7 33.e4 (33...a5 34.a4 Ka6 35.Bc4 Ka7 36.g4 b6 37.Qc7 Ka8 38.Bd5#) 1–0. pierre (2075) – Ramiz, internet, 2006.

4.b5 Bd6 5.c4 Be6 6.c5 Bc5 7.Be5 f6 8.Bb8 Rb8 9.bc6 bc6 10.Qc2 Qd6 11.Nf3 Ne7 12.Nc3 Bb6 13.Be2 Bc7 14.0–0 (14.Nd4 0–0=+) 14...Bg4 15.g3 h5 16.Nd4 Be2 17.Nce2 g5 (17...h4!?=) 18.Rfc1 h4 19.Nc6 Rc8?? (better is 19...Nc6 20.Qc6 Qc6 21.Rc6 Kd7+/–) 20.Ne7 (better is 20.Na7 0–0 21.a4+–) 20...Ke7 21.Nd4 Qe5?? (21...Qd7 22.Qg6 Rcg8 23.Nf5 Ke6 24.Rc6 Bd6 25.Nd4 (25.Rd6?! Qd6 26.Ng7 Ke7+/–) 25...Ke7 26.Qf5+–) 22.Qc5 (22.Nc6 Ke6 23.Ne5 Be5+–) 22...Qd6 (22...Kf7 23.Qa7 hg3 24.hg3 g4+–) 23.Nf5 Ke6 24.Nd6 (24.Qd6?! Bd6 25.g4 Rc4+/–) 24...Bd6 25.Qa7 hg3 (25...Ra8 26.Qb7 Rhb8 27.Qc6+–) 26.fg3 (better is 26.hg3 Rc1 27.Rc1 Rb8+–) 26...f5 (26...Ra8 27.Qd4 f5 28.a4+–) 27.Rc8 Rc8 28.Qg7 f4 29.Qg5 (29.ef4 Bc5 30.d4 Bd4 31.Qd4 Rb8+–) 29...fg3 30.hg3 (better is 30.Qg4 Ke7 31.Qc8 gh2 32.Kh1 Ba3+–) 30...Rc2 (30...Rf8+–) 31.Qg6 Ke5 32.Qc2 (32.d4) 32...d4 33.ed4 (33...Kd5 34.Qb3 Kd4 35.Qa4 Kd5 36.Qd7+–) 1–0. reverendrev – LeoBloom, Live Game Caissa's Web, 2004.

4.b5 f6 5.bc6 (--> 1.b4 e5 2.Bb2 f6 3.b5 d5 4.e3 c5 5.bc6).

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

4.a3 Bd6

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

5.Nf3 Nf6 6.c4 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.e3 Nf6 5.c4 c6 6.Nf3).

4.Be5 Bb4??

5.Bg7+– Bf5 6.Bh8 Qe7 7.Bb2 Nh6 8.Be2 Qe4 9.Nf3 Nd7 10.0–0 0–0–0 11.d3 Qe6 12.Nd4 Bh3 13.Bf3 Qg6 14.Kh1 Rg8 15.Rg1 Ng4 16.Bg4 Bg4 17.f3 Ne5 18.fg4 Ng4 19.Qf3 Bd6 20.Qf5 Qf5 0–1. KHW – tobey, ChessWorld.net, 2001.

5.Bg7+– f6 6.Bh8 Bf5 7.Bd3 Nh6 8.Qh5 Bg6 9.Bg6 Kd7 10.Qh6 Qh8 (10...hg6 11.Bg7+–) 11.Qh7 (11.Qh7 Qh7 12.Bh7+–) 1–0. DEFFM – GuestTFBR, freechess.org, 2018.

4.Be5 Nd7

5.Bb2 Ngf6 6.a3 a5 7.ba5 Qa5 8.Nf3 c5 9.Be2 b5 10.0–0 Bd6 11.d3 Bb7 12.Nbd2 Qc7 13.h3 h6 14.c4 bc4 15.dc4 0–0 16.cd5 Bd5 17.Nc4 Bf3 (17...Rfb8!? 18.Qc2 Qc6+/–) 18.Bf3+– (18.gf3?! Bh2 19.Kg2 Be5+/–) 18...Rab8 19.Bf6 Nf6?? (better is 19...Bh2 20.Kh1 Nf6+–) 20.Qd6 (20.Nd6?! Rfd8+/–) 20...Qa7 21.Qg3 Rfe8 22.Ne5 (better is 22.Nd6 Re6+–) 22...Re6 (22...Qc7 23.Ng4 Qg3 24.Nf6 gf6 25.fg3 Re3+–) 23.Nc6 Rc6 24.Bc6 Rc8 25.Bf3 c4 26.Rfc1 Qa5 27.Qd6 c3 28.Qb4 (28.Qb4 Qe5 29.Ra2+–) 1–0. mr5reasons1 (1770) – vl007 (1640), gameknot.com, 2012.

5.Bb2 Ngf6 6.a3 Bd6 7.g4 0–0 8.g5 Ne4 9.f4 Nb6 10.d3 Ng5 (10...Na4 11.Bd4 c5 12.de4 cd4 13.e5+/–) 11.fg5 Qg5 12.Nf3 (12.Qf3!?+/–) 12...Qe3+= 13.Be2 Bg4? (13...Re8 14.Nbd2+=) 14.Bd4 (14.Rg1 h5 15.Bd4 Qe6+/–) 14...Qe8? (14...Qh6 15.Qd2 Bf4 16.Qc3=) 15.Kd2 Bf4= 16.Kc3 Rc8 17.Rg1+/– Bf3?? 18.Rg7 Kh8 19.Rg8!! Kg8 20.Qg1 Bg5 21.Qg5 1–0. bentengutama (1900) – nbarletta (2065), net–chess.com, 2003.

5.Bc3 Ngf6 6.a3 Be7 7.d4 0–0 8.Nf3 b6 9.Nbd2 c5 (9...Ne4 10.Ne4 de4 11.Ne5 Ne5 12.de5+=) 10.bc5 bc5 11.dc5 Bc5 12.Bb4 (12.Nb3 Bd6+/–) 12...Bb7 (12...Qc7 13.Nb3+=) 13.Bc5 Nc5 14.Nb3 Nb3 15.cb3 Qa5 16.b4 Qb6 17.Bd3 Ne4 18.0–0 Rad8 19.Be4 de4 20.Nd4 Ba6 21.Re1 f5 22.Qb3 Kh8 23.Ne6 (23…Rd3 24.Qa2+/–) 1–0. slavisa11 – 596649590, Live Game Caissa's Web, 2004.

4.Be5 f6

5.Bb2 Bb4 6.Nf3 Bg4 7.Be2 Nd7 8.0–0 Ne7 9.h3 Bf3 10.Bf3 Ne5 11.a3 Nf3 12.Qf3 Bd6 13.Nc3 0–0 14.Ne2 Qc7 15.Nf4 Ng6 (15...Bf4!? 16.ef4 Ng6+=) 16.Ng6 (better is 16.Ne6!? Qf7 17.Nf8 Rf8 18.d3+/–) 16...hg6+= 17.d3 Rae8 18.Rfe1 Re7 19.c4 dc4 20.dc4 Be5 21.Be5 Re5 22.Red1 Rd8 23.Rd8 Qd8 24.Rd1 Qa5 25.Qg4 Rg5?? (better is 25...Kh7+=) 26.Qc8+– (26.Qc8 Kh7 27.Rd8 (27.Qb7?! Qf5 28.Qc6 Qh3+–) 27...Qd8 28.Qd8+–) 1–0. Rush,Bradley – Bieszk,Stanislaw, 47. LSS No Engine Cup Preliminary, 2011.

5.Bb2 Nd7 6.Bd3 Nb6? (better 6...Bb4!? 7.Qh5 Kf8=) 7.Qh5+– g6 (7...Kd7 8.Nc3+–) 8.Bg6! Ke7 (8...hg6 9.Qh8 Pinning (9.Qh8 Deflection)) 9.Ne2 (9.Nf3 Qd7 10.h3 Kd8+–) 9...Bg7 (9...Nc4 10.Bd4 Qd7 11.Bc5 (11.Bh7 Kd8–/+) 11...Nd6 12.h3+–) 10.Bh7 (better 10.Bd3!? Nh6+–) 10...Nh6 11.Qg6 Qf8 12.e4 (12.Bd4 Qf7 13.Ng3 Nd7+–) 12...Be6 13.Bd4 (better 13.Nf4 Bf7 14.ed5 Nd5 15.Qe4 Kd8 16.Ng6 Bg6 17.Qg6+=) 13...Nc4?? (13...Kd7 14.Bc5 Qf7 15.Bb6 ab6 16.ed5 cd5 17.Qf7 Nf7+–) 14.Bc5 Nd6 15.ed5 (15.Qg3 Rd8 16.Nf4 Bf7+–) 15...cd5 (15...Bd5 16.Nbc3 Qf7 17.Qg3 Rh7 18.Qd6 (worse 18.Bd6 Kd7+–) 18...Ke8 19.Nd5 cd5 20.0–0+–) 16.Qg3 Rd8 17.Nf4 Rh7 (17...Bf7 18.Bg6 b6 19.Bd6 Kd6 20.Bf7 Qf7 21.0–0+–) 18.Bd6 Rd6 19.Ng6 Kd7 (19...Kf7 20.Nf8 Bf8 21.0–0+–) 20.Nf8 Bf8 21.0–0 Kc7 (21...Nf5 22.Qd3 Rh4 23.f4+–) 22.Nc3 a6 23.b5 Nf5 24.Qg6 (24.Qf3 Kc8+–) 24...Rg7 25.Qf6 (better 25.Qe8 Rg8 26.ba6+–) 25...Nd4 (25...Rg8 26.Qe5 Nh4+–) 26.Qd4 Rg4 27.Qc5 Kb8 28.ba6 Rg8 29.Nb5 Ra6 (29...Rg2 30.Kg2 Bh3 31.Kh1 Bg2 32.Kg1 Rc6 33.Qf8 Rc8 34.a7 Ka8 35.Qc8) 30.Qc7 Ka8 31.Qd8 Bc8 32.Qc8 1–0. GuestJVKF – GuestWLLQ, freechess.org, 2020.

4.Be5 Nf6

5.a3 Bd6 6.Bd6 Qd6 7.Nf3 Bg4 8.Be2 Nbd7 9.0–0 0–0 10.d4 (10.Nd4 Be2 11.Qe2 a5+=) 10...h5 (better 10...Bf3!? 11.Bf3 Rfe8+=) 11.Nbd2+– Ne4 12.h3 (12.Ne4 de4 13.Nd2 Nf6+–) 12...Bf5 (12...Nc3 13.Qe1 Bf5 14.Nb3 Ne2 15.Qe2+–) 13.Ne4+– Be4 14.Nd2 Qg6 (14...h4!?+–) 15.Ne4+– de4 16.Bh5 Qg5 17.Be2 Nf6 18.f4 (better 18.c3!?+–) 18...Qg3+– 19.Qd2 g5? (better 19...Nd5 20.Rfe1 Ne3+–) 20.fg5 Nh5?? (20...Nd5 21.Rfe1 Qg5+–) 21.Bh5 Kg7 (21...Qg5 22.Bg4+–) 22.Bg4 Rh8 23.Qf2 Qc7 (23...Qf2 24.Rf2 Rae8+–) 24.Qf6 Kg8 25.g6 Rf8 26.g7 (better 26.gf7 Rf7 27.Qg6 Kf8 28.Be6+–) 26...Rh6 27.Qh6 f6 (27...Qh2 28.Kh2 f5 29.gf8Q) 28.Be6 (28.Be6 Qf7 29.gf8Q; 28.gf8Q) 1–0. BeepBeepImAJeep (2655) – assaf3 (1715), lichess.org, 2015.

5.a3 Nbd7 6.Bb2 Bd6 (6...a5 7.b5+=) 7.Nf3 0–0 8.c4 (8.Be2 b5+=) 8...dc4 9.Bc4 Nb6 10.d3 (10.Bd3 a5+=) 10...Nc4 (10...a5 11.Nbd2=) 11.dc4+= Bg4 (11...Qe7 12.0–0+=) 12.h3 (12.c5 Be7+/–) 12...Bh5 (12...Be6 13.c5 Be7 14.Qd8 Rad8 15.Nbd2+/–) 13.Nbd2 (13.c5 Be7+/–) 13...Re8+= 14.0–0 Qe7 15.c5 Bc7 16.Qb3 Rad8 17.Qc4 (17.Qa4 a6+=) 17...Bg6 18.Rfe1 Ne4 19.Rad1 Rd5 (19...Bf5 20.Nd4 Bg6 21.Qe2+=) 20.Ne4+/– Be4 21.Rd5 cd5 22.Qc3 f6 23.Nd2 Bg6 (23...Bf5 24.Qb3 Qf7 25.Bd4+/–) 24.Rc1 (24.Qb3 Qe6+/–) 24...Be5 (24...Qe6 25.Qb3+/–) 25.Qb3 Bf7 (25...Qe6 26.Be5 fe5 27.b5+/–) 26.Qd5?? (better is 26.Bd4+/–) 26…Bd5–+ 0–1. Waibel,Ulrich – Crowell,Jim, compuserve casual, 1997.

3.e3 e6

4.a3 a5 5.b5 Qe7 6.Nf3 Nd7 7.Be2 h5 (7...Ngf6 8.0–0+=) 8.c4 (8.Nc3 h4+–) 8...h4 (8...dc4 9.bc6 bc6 10.Bc4+–) 9.Nc3 h3 10.gh3 Rh3 11.bc6 Nb6?? (better 11...bc6 12.cd5 ed5+–) 12.cd5+– ed5 (12...Nd5 13.Bb5 Kd8 14.Ne5+–) 13.Qb3 Qc5 (13...Qc7 14.Nb5 Qc6 15.Ne5+–) 14.Na4 Qc6 (14...Na4 15.cb7 Rb8 16.bc8Q Qc8 17.Qa4 Qd7 18.Qd4+–) 15.Bb5 Na4 (15...Nd7 16.Bc6 bc6 17.Ng5+–) 16.Bc6 (better 16.Qa4 Bd7 17.Bc6 Bc6 18.Qf4+–) 16...Ke7 (16...bc6 17.Qa4 Ne7+–) 17.Ba4 Nf6 18.Bf6 gf6 19.Qd5 Bg7 20.Qc5 Kd8 21.Qd6 Bd7 22.Qd7 1–0. Pierre – Sillie, internet, 2020.

4.a3 Nd7 5.f4 Ngf6 6.Nf3 Be7 7.Be2 0–0 8.0–0 a6 9.c4 (9.Nc3 b6=) 9...Qc7 (9...dc4 10.Bc4 b5 11.Be2=) 10.Nc3 Bd6 (10...dc4!? 11.Bc4 b5=) 11.c5+= Be7 12.Ng5 h6 13.h4?? (better is 13.Nf3+=) 13...hg5–+ 14.hg5 Nh7 15.Bh5 g6 16.Kf2? gh5 17.Qh5 Re8 18.Rh1?? Ndf8–+ 19.Qh6 e5 20.Nd5 cd5 21.Be5= A double attack 21...Qe5 22.fe5 Bf5 23.Qb6 Ng5 24.Qb7+= Be4 25.Rh6 d4+= 26.ed4?? Bb7–+ (27.c6 Bc8–+) 0–1. mrkt – rts28, itsyourturn.com, 2000.

4.a3 h6 5.c4 (5.Nf3 Nf6=) 5...dc4 6.Bc4 Nf6 (6...b5 7.Be2=) 7.Nf3 (7.d4 Bd6=) 7...Nbd7 (7...b5 8.Be2=) 8.Qb3 (8.d4 a5=) 8...Qe7 (8...a5 9.0–0=) 9.d4+= b5 (9...Qd6 10.Bd3+=) 10.Bd3 a6 (10...Qd6 11.0–0+=) 11.0–0+/– Bb7 12.Nbd2 Nb6 (12...Qd6 13.e4 Qf4 14.Bc1+/–) 13.Rac1 (13.Rfc1 Nbd5+/–) 13...Rd8 (13...a5!? 14.Bc3 Nbd5=) 14.Ne5 Rd6? (better is 14...Qc7+/–) 15.Bg6!+– fg6 16.Ng6 Theme: Double Attack 16...Qf7 17.Nh8 Qh5 18.e4 Qe2 (18...Na4 19.e5 Ng4 20.Nf3+–) 19.e5 Rd5 20.ef6 (20...Qd2 21.Qg3+–; 20.Nf3 Ng4 21.h3 Nc4+–) 1–0. Woelfelschneider,Peter – Trzcielinski,Harald, corr ICCF 2–2866, 1993.

4.a4 a5 5.b5 cb5 6.ab5 (6.Bb5 Nc6+=) 6...Bd7 (better 6...Nf6!?=) 7.Nf3 Qb6 (better 7...Nf6!?+–) 8.Bd4+– Qd8 9.c4 dc4 10.Bc4 Nf6 11.0–0 (11.Nc3 Bc8+–) 11...Qc7 (11...Bc8 12.Nc3+–) 12.Qb3 Bc5 13.Bf6 (13.Bc5 Qc5 14.Nc3 0–0+–) 13...gf6 14.Rc1 Qd8 (14...Be7 15.Qb2 Qb6 16.Nc3+–) 15.d4 Bb6 (15...Bb4 16.Bd3+–) 16.d5 ed5 (16...0–0 17.Nc3 ed5 18.Bd5+–) 17.Bd5 Be6?? (17...0–0+–) 18.Be6 fe6 (18...0–0 19.Bf5 Qe7 20.Qc4+–) 19.Qe6 Qe7 20.Qb6 Nd7 (20...0–0 21.Nd4 Nd7 22.Qb7+–) 21.Qb7 Rb8 22.Qc7 (better 22.Qa7!? 0–0 23.Nc3 Ra8+–) 22...Rg8 (22...Rb5 23.Qc8 Qd8 24.Qc6+–) 23.Nd4 (23.Nd4 Qe5 24.Qa5+–) 1–0. GuestDRJF – GuestPRPM, freechess.org, 2020.

4.a4 Bb4?? 5.Bg7 Nf6 6.Bh8 Ke7 7.Bf6 Kf6 8.Qg4 (better 8.Qh5 Qh8 9.Qh4 Kg6 10.Qg3 Kh6 11.Qf4 Kg6 12.Nf3 Bd2 13.Kd1+–) 8...Ke7 (8...Qf8+–) 9.Qh4 (9.Qb4 Ke8+–) 9...Kd7 (9...Ke8 10.Qb4 e5 11.d4+–) 10.Qb4 1–0. GuestSVRL – GuestARC, freechess.org, 2019.

4.a4 b6 5.Nf3 a5 (5...Nf6 6.b5=) 6.b5 c5 7.c4 Bb7 8.cd5 Bd5 9.Nc3 Bb7 10.Bc4 Nf6 11.0–0 Be7 (11...Bd6 12.Qe2=) 12.d4+= cd4 13.Nd4 0–0 14.Qb3 Kh8 (14...Bd6 15.Be6 fe6 16.Ne6+=) 15.Rad1 Qc7 16.Be6 Nbd7 (16...fe6!? 17.Ne6 Qe5 18.Nf8 Ng4+=) 17.Bd7 Nd7 (17...Qd7 18.Nc6 Qg4 19.f3+–) 18.Nd5+– Qc5? (better 18...Bd5 19.Qd5 Nc5+–) 19.Nc6! (19.Ne7?! Qe7 20.f3 Nc5+–) 19...Bc6 20.bc6 Nf6 21.Bf6 gf6 (21...Bf6 22.Qb6 Be7 23.Qc5 Bc5 24.c7+–) 22.c7 (worse 22.Qb6 Qb6 23.Nb6 Ra6+–; worse 22.Ne7 Qe7 23.Qb6 Rfb8+–) 22...Rac8 23.Rc1 (23.Ne7?! Qe7 24.Qb6 Rc7 25.Qa5 Ra7+–) 23...Qd6 24.Rfd1 Qe6 (24...Qe5 25.Qb6 Bd6 26.f4+–) 25.Qb6 Bb4 (25...Ba3 26.Rc6 Qd7 27.Rd4+–) 26.Qe6 fe6 27.Nb6 Rf7 1–0. DEFFM – GuestYDQT, freechess.org, 2018.

4.a4 Qb6 5.b5 a6 (5...Nf6 6.Nf3=) 6.Nf3 (6.Nc3 Nf6+=) 6...ab5 7.ab5 Ra1 8.Ba1 cb5 (8...Nd7 9.Bd4 c5 10.Bb2=) 9.Bd4 (better 9.Nc3+=) 9...Bc5?? (better 9...Qa5 10.Nc3 Bd7=) 10.Bg7+– f6 (10...b4 11.Bh8 Be7 12.d4+–) 11.Bh8 h6 (11...b4 12.d4 Bd6 13.Bd3+–) 12.Bd3 (12.Nd4 Bd4 13.Qg4 Ne7 14.ed4 Nd7+–) 12...Qc7 (12...b4 13.Bh7 Ne7 14.Bf6+–) 13.0–0 (13.Nc3 b4 14.Na4 Na6+–) 13...Nc6 (13...b4 14.c3 Nc6 15.Bg6 Kd8 16.Qa4+–) 14.Nc3 Kf7 (14...b4 15.Nb5 Qf7 16.Qa1+–) 15.Nb5 Qd8 16.Nh4 Nge7 (16...Ne5+–) 17.Qh5 Kg8 18.Qh6 Nf5 19.Bf5 ef5 20.Qg7 1–0. GuestQPWL – GuestCJYS, freechess.org, 2020.

4.a4 Qe7 5.b5 c5 (5...Qc7 6.c4=) 6.c4 Qd6 7.Nf3 d4 (better 7...Nd7!?+=) 8.ed4+– cd4 9.Bd4 e5? (better 9...Nd7+–) 10.Be5 Qe6 11.Be2 f6 (11...Nd7 12.Bg3 Ngf6 13.0–0+–) 12.Bb2 Bc5 (12...Bb4 13.0–0 Ne7 14.Qb3+–) 13.0–0 Ne7 14.d4 Bb4 15.c5 0–0 (15...Qf7 16.Nbd2 Be6 17.Ne4+–) 16.Qc2 (16.a5 Nbc6 17.bc6 bc6+–) 16...Kh8 (16...Qf7 17.Bd3 g5 18.Nbd2+–) 17.a5 Nd5 (17...a6 18.Ra4 Nd5 19.Bc4 ab5 20.Bd5 Qd5 21.Rb4 Ra5 22.Nc3+–) 18.Bc4 f5 (18...Nc6 19.bc6 bc6+–) 19.Qb3 Rd8 1–0. DEFFM – GuestDWJX, freechess.org, 2019.

4.a4 f5 5.Nf3 Nf6 6.b5 Bd6 7.h3 0–0 8.Be2 c5 (8...Qc7 9.d4=+) 9.c4 b6 10.Nc3 Bb7 11.0–0 Nbd7 12.d4 Ne4 13.cd5 Nc3 (worse 13...ed5 14.Nd5 Bd5 15.dc5 Bh2 16.Kh2 Ndc5 17.Qd4 Qc7 18.Kg1+–; worse 13...Bd5 14.Nd5 ed5 15.dc5 Ndc5 16.Qd5 Kh8 17.Bc4+–) 14.Bc3 Bd5 15.Rc1 Nf6 (15...Rc8 16.Qc2=) 16.dc5 Bc5 17.Ne5 Ne4 18.Bd4 Rc8 19.Bc4 Bd4 20.Qd4 Nf6 (20...Bc4!? 21.Rc4 Rc5 22.Rc5 bc5 23.Qd8 Rd8+–) 21.Nc6+= Qd7 22.Rfd1 (22.Bd5!? Nd5 23.Qe5+=) 22...Bc6= 23.bc6 Qc6 24.Qe5 Nd5?? (24...Kh8 25.Qe6 Qc5 26.Qd6=) 25.Bd5?? (25.Rd5 Kh8 26.Rdd1 Qa4 27.Be6 Rc1 28.Rc1 Qe4+–) 25...Qc1?? (better 25...Qd5 26.Rd5 Rc1 27.Kh2 ed5 28.Qd5 Kh8+–) 26.Be6+– (26.Rc1?! Rc1 27.Kh2 ed5 28.Qd5 Kh8+=) 26...Kh8 27.Rc1 Rc1 28.Kh2 Rc5 29.Qd6 Ra8 30.Kg3 (30.Qd7!? f4+–) 30...h6 (30...Ra5 31.Kf3+–) 31.Qf4 1–0. Kislov,Leonid – Ledovskih,Viktor, Half Omsk, 2009.

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

4.b5 Qa5 5.a4 (5.bc6 Nc6 6.Nf3 Nf6=) 5...Nf6 6.Be2 (6.Bf6 gf6 7.Nf3 Rg8=) 6...Bd7 (6...Bd6 7.Bf6 gf6 8.Nf3=) 7.Nf3 c5 (7...Bd6 8.0–0=) 8.c4 (8.Bf6 gf6 9.0–0 c4=) 8...Qc7 (8...Bd6 9.0–0=) 9.0–0 (9.Bf6 gf6 10.cd5 Bd6+/–) 9...Be7 (9...Bd6 10.Bf6 gf6 11.cd5 ed5 12.d4+/–) 10.d4 (10.Be5 Bd6 11.d4 cd4 12.Qd4 Be5 13.Ne5 0–0+=) 10...b6 (10...cd4!? 11.Qd4 0–0+=) 11.dc5 (11.cd5 ed5 12.dc5 bc5+=) 11...bc5 (11...Qc5 12.Ba3 Qc7 13.Be7 Ke7 14.cd5 Nd5 15.e4+/–) 12.cd5 ed5 13.Bf6 Bf6 14.Qd5 (14.Ra2 Be6 15.Rc2=) 14...Ba1 (better is 14...Bc6!? 15.bc6 Ba1 16.Qe4 Kf8=) 15.Qa8 0–0 16.Qe4 h6 (16...Re8 17.Qc2+=) 17.Nbd2 (17.Bd3 Rd8+/–) 17...Bf6 (17...Re8 18.Qc2 (worse is 18.Ra1 Re4 19.Ne4 Bf5+=) 18...Bf6 19.Ne4+–) 18.Rc1 (18.Bd3 Rd8+/–) 18...Be6 (18...Re8 19.Qc2 Be7 20.Nc4+/–) 19.Bc4 Bc4 (19...Qe7 20.Be6 fe6 21.Nc4+/–) 20.Nc4 Qe7 (20...Rd8 21.Qf5+/–) 21.Qe7+– Be7 22.h3 Rd8 23.a5 Rd3 24.Nfe5 Rb3 25.Nc6 Nc6 26.bc6 Rb8 27.Rd1 Rc8 28.Rd7 Bf6 29.c7 Kh7?? 30.Nd6 Rc7 31.Rc7 Be5 32.Rc6 Bf6 (32...Bd6 33.Rd6 c4 34.Rc6+–) 1–0. Woelfelschneider,Peter – Link,Herbert, PCM–2003–G2.21, 2003.

4.b5 b6 5.a4 Qe7 (5...Nf6 6.a5=) 6.c4 (6.Nf3 Nf6+=) 6...cb5 7.cb5 a6 8.Nc3 ab5 9.ab5 (9.Nb5 Nc6+=) 9...Ra1= 10.Qa1 Kd7?? (better 10...Nf6!?+=) 11.Nf3 (11.Qa7!? Kd8 12.Qb8 Qc7 13.Qc7 Kc7+–) 11...Bb7? (11...Ke8 12.Na4 Nd7 13.Bd4+–) 12.Be2 (12.Qa7!? Kc8 13.Na4 Nd7+–) 12...Kc8 (12...Ke8!?+–) 13.0–0 f5?? (13...Nd7 14.Rc1 Kb8 15.Na4+–) 14.d4 (14.Rc1 Kd8 15.Qa7 Bc8 16.Qb6 Qc7 17.Nd5 Qb6 18.Nb6 Ne7+–) 14...f4 (14...Qb4 15.Rc1 Kd8+–) 15.Rc1 (worse 15.ef4 Qd6 16.Ne5 Nh6+–) 15...fe3 (15...Kd8 16.Qa7 Bc8 17.Qb8 Qb7 18.Qb7 Bb7+–) 16.Nd5 Kd7 17.Ne7 Ke7 18.fe3 (18.Qa7 ef2 19.Kf1 Kf7 20.Qb7 Ne7 21.Qb8 h6 22.Ne5 Kg8 23.Qe8 Kh7 24.Bd3 Nf5 25.Qg6 Kg8 26.Qe6 Kh7 27.Bf5 g6 28.Qg6) 18...Kf7 19.Ne5 Kf6 20.Rc7 (20.Rf1 Ke7 21.Qa3 Kd8 22.Qf8 Kc7 23.Rf7 Ne7 24.Re7 Kd6 25.Rd7) 20...Bd6 (20...Nh6 21.Qf1 Bf3 22.Qf3 Nf5 23.Rf7 Kg5 24.Qh5) 21.Rf7 (21.Qf1 Bf3 22.Qf3 Kg5 23.Qf4) 21...Kg5 22.e4! Be5 (22...Be4 23.Qc1 A beautiful mate combination) 23.de5 Nf6 (23...Kg6 24.Bh5! Kg5 25.Qc1 Kh5 26.Rg7 h6 27.Qd1 Kh4 28.Qg4) 24.Qc1 (24.Rg7 Kh6 25.ef6 Rd8 26.Qc1 Rd2 27.Qd2) 24...Kg6 25.Rf6 (25.ef6 Rg8 26.Rg7 Rg7 27.fg7 Kf7 28.Qc7 Nd7 29.Qd7 Kg6 30.g8Q Kh6 31.Qde6) 25...gf6+– 26.ef6 Kf7 27.e5 (27.Qc7 Nd7 28.Qd7 Kf8 29.Qd8 Kf7 30.Bh5) 27...Nd7 (27...Ke8 28.Qc7 Nd7 29.Bh5 Kf8 30.Qd8) 28.Bh5 Kf8 (28...Kg8 29.Qg5 Kf8 30.Qg7) 29.Qc7 (29.Qh6 Kg8 30.Qg7) 29...Ne5 (29...Kg8 30.Qd7 Bg2 31.Qd8) 30.Qe7 (30.Qd8) 30...Kg8 31.Qg7 (31.Qd8) 1–0. BeepBeepImAJeep (2520) – HUN_ATTILA (1635), lichess.org, 2017.

4.b5 c5 5.Nf3= a6 6.Nc3 d4 (6...Nf6 7.Be2=) 7.ed4+= cd4 8.Ne2 ab5 (8...d3 9.Ned4 dc2 10.Qc2=) 9.Nfd4 (9.Ned4 b4+/–) 9...Qa5 (9...b4 10.Ng3+=) 10.Nc3 (10.Nb3 Qc7+/–) 10...b4+= 11.Nb3 (11.Ncb5 Qd8+=) 11...Qe5 12.Qe2 Nc6?? (better is 12...Qe2 13.Ne2 Nc6+=) 13.Qe5+– Ne5 14.Bb5 (better is 14.Nb5 Nf3 15.Ke2+–) 14...Bd7= 15.Bd7 Nd7 16.Nb5 Kd8 17.a4 (17.Ke2 Ngf6=) 17...ba3= 18.Na3 Nc5?? (18...Ngf6 19.Ke2=) 19.0–0?? (better is 19.Nc5 Bc5 20.Bg7 Ra3 21.Ra3 Ba3 22.Bh8+–) 19...Nb3+= 20.cb3 Bb4?? (better is 20...Nh6+=) 21.Nc2+– (21.Nc2 Rc8 22.Nb4+–; 21.Bg7?! Ra3 22.Bh8 Ne7 23.Ra3 Ba3+–) 1–0. Tiedemann,Joern (1995) – Feiertag,Manfred, RSS7E basic–34, 2010.

4.c3 b5 5.Nf3 a6 6.d4 Bd7 7.Bd3 Bd6 8.Qc2 Nf6 9.Nbd2 0–0 10.0–0 h6 11.a3 Bc8 12.Rfe1 Bb7 13.e4 Nbd7?? (13...de4 14.Ne4 Ne4 15.Be4+=) 14.ed5?? (better is 14.e5+–) 14...Nd5 15.Rac1 Nc7 16.Ne4 c5?? (better is 16...Bf4 17.Ra1 Nd5+=) 17.Nd6+– Bf3 18.gf3 cb4 19.ab4 (19.cb4 Qg5 20.Kh1 Nd5 21.Bh7 Kh8+–) 19...Nf6 (19...Qg5 20.Kh1 Qf4 21.Ne4 Qf3 22.Kg1 Qg4 23.Ng3+–) 20.Ne4 Ne4 21.fe4 Nd5 22.ed5 ed5 23.Bf1 Rc8 24.Bg2 a5 25.ba5 Qa5 26.Ra1 Qc7 27.Rab1 1–0. Fournier,Frederic (1715) – SEBASTIANLOPEZ (1605), Active blind, 2011.

4.c3 f6 5.Nf3 Bd6 6.d4 Ne7 7.Bd3 0–0 8.Nbd2 c5 (better is 8...e5 9.Qb3 a5 10.ba5 Ra5=) 9.bc5+/– Bc7 10.Qc2 b6 11.cb6 ab6 12.0–0 (12.Bh7 Kh8+–) 12...Nbc6 (12...f5 13.c4+/–) 13.a4 e5 14.Ne5?? (better is 14.Bh7 Kh8 15.de5 fe5 16.c4+–) 14...fe5–/+ 15.de5 Ba6 16.Ba6 Ra6 17.Nf3? (17.f4 Qd7+=) 17...Ra8 (17...Ne5 18.Ne5 Be5 19.c4 Bb2 20.Qb2–/+) 18.Rfd1 Qb8 19.Qc1 (19.e6 Ne5 20.Ne5 Be5–/+) 19...g6 (19...Ne5 20.Ne5 Be5 21.f4–+) 20.h3 (better is 20.e6 Ne5 21.Ne5 Be5 22.f4–/+) 20...h6 (20...Ne5 21.Ne5 Be5 22.f4–+) 21.Ba3 g5 22.Nd4 Nd4 23.ed4 Rf5?? 24.Rb1 h5?? 25.Be7+– Kf7 26.Bb4 g4 27.hg4 hg4 28.Rd2 Be5? 29.de5 Re5 30.Qb2 Re1 31.Re1 Qe8 32.Re8 Ke8 33.Re2 Kd8 34.f3 g3 35.a5 ba5 36.Ba5! Ra5 37.Qb4 Ra1 38.Re1 Re1 0–1. Fournier,Frederic (1820) – ericateamo (1650), Active Blind, 2008.

4.Nc3 Bb4 5.Nd5 Bf8 (5...ed5 6.Bg7) 6.Nc3 Nf6 7.d4 Bb4 8.Bd3 0–0 9.Nge2 b6 10.0–0 Nbd7 11.Ne4 c5 (11...Ne4 12.Be4 Bb7 13.Nf4=) 12.dc5 (12.a3 Ba5+/–) 12...bc5 (12...Bc5 13.Rb1=) 13.Nd6 Qe7 14.Nb5 a6 15.c3 (15.Nd6 Kh8 16.Bc4 Nb6=) 15...Ba5 16.Na3 Ne5 17.e4? (17.c4 Nd3 18.Qd3 Rd8=+) 17...Bb7 (better is 17...Rd8 18.Nf4 Rb8–+) 18.f3?? (better is 18.Bb1–/+) 18...Rad8 19.Nf4 g5 20.c4 gf4?? 21.Be5= Nd7 22.Bb2 Bb4 23.g3?? Ba3–+ 24.Ba3 Ne5 25.gf4 Nd3 26.Qd2 Qf6 27.f5 ef5 28.Kh1 fe4 29.fe4 Qe5 30.Rg1 Kh8 31.Rg5 Qe4 32.Rg2 Qd4 33.Rag1 Rg8 34.h3 Rg2 35.Rg2 Rg8 36.Kh2 Rg2 37.Qg2 Bg2 38.Kg2 Qf2 39.Kh1 Nf4 40.Bc5 Qg2# 0–1. pituflu – rla, internet, 2007.

4.Be2 Nf6 5.a3 Bd6 6.Nf3 0–0 7.0–0 Ng4 8.h3 Nh6 (8...Nf6 9.Be5=) 9.Nh2 (9.d3 f6=) 9...Qg5 (9...e5 10.d3=+) 10.f4 (better is 10.Nf3 Qe7 11.d3=) 10...Qf5?? (10...Qg3 11.Bd3=) 11.Bg4 (better is 11.Bd3+–) 11...Qe4 (11...Ng4 12.Qg4 Qg4 13.Ng4=+) 12.Bf3 (better is 12.Bh5 e5 13.Nc3+=) 12...Qf5?? (12...Qg6 13.Bh5 Qg3 14.Nc3=) 13.Ng4?? (better is 13.g4 Qg6 14.g5+–) 13...Ng4=+ 14.Bg4 Qe4 15.Nc3 Qc4?? 16.Be2+– Qe2 17.Qe2 Re8 18.d4 e5 19.de5 Bc7 20.Qd3 Be6 21.Ne2 g5 22.fg5 Nd7 23.Rf4 b5 24.Rh4 f5 25.gf6 Nf6 26.ef6 Rf8 27.Qh7# 1–0. 1805DYDIDIDY – Hobbykegler, mySchach.de, 2005.

4.Ne2 Bb4?? 5.Bg7 e5 6.Bh8+–.

4.Ne2 Nd7 5.Ng3 Ngf6 (5...Bb4?? 6.Bg7 e5 7.Bh8+–) 6.a3 g6 (6...Bd6 7.Be2=) 7.c4 Bg7 8.cd5 ed5 9.Be2 0–0 10.0–0 Nb6 11.Qc2 Re8 12.Nc3 a6 13.f4 (13.d4 h5=) 13...Ne4 (13...Nc4 14.Bc4 dc4 15.f5=+) 14.Nge4 de4 (14...Re4? 15.Ne4 Bb2 16.Qb2 de4 17.Qc2+–) 15.Rab1 Nd5 (better is 15...Qe7!?=) 16.Ne4+/– Bf5 17.Bd3 Bb2 18.Rb2 Qe7 19.Ng3 Ne3 20.Nf5 gf5?? (better is 20...Nf5 21.Bf5 gf5 22.Qf5 Rad8+=) 21.de3+– Qe3 22.Kh1 Qf2 (22...Rad8 23.Rb3 Qe1+–) 23.Qf2 (23…Rad8 24.Qg3 Kf8 25.Qh3+–) 1–0. Otte,Marco – de Mey,Bob, Wag.Ext.3vsWag4, 1997.

4.Be5 Nd7 5.Bb2 =+.

4.Be5 Nf6 5.Nf3 (5.a3 Nbd7 6.f4 a5=+) 5...Bb4–/+ 6.c3 Bd6 (6...Be7 7.d4–/+) 7.g3 (better is 7.d4–/+) 7...Nbd7?? (better is 7...Be5 8.Ne5 0–0–/+) 8.Bd6+– Ne4 9.Bb4 (9.Ba3 Qf6+–) 9...Qf6 10.h4 (10.d3 a5 11.de4 ab4 12.ed5 ed5+–) 10...Ne5 11.Ne5?? (better is 11.Be2+/–) 11…Qf2. manofsteel5 – donesteban6, Live Game Caissa's Web, 2005.

4.Qf3 Bb4 5.Bg7 Bd2 6.Nd2 +–.

4.Qf3 Ne7 5.Bd3 Nd7 6.Qh3 Ne5?? (better is 6...e5=+) 7.Be5+– b6 (7...f6 8.Bd4+–) 8.Qh5 g6 (8...a5 9.ba5 Ra5 10.Nf3+–) 9.Qf3 Ng8 (9...Rg8+–) 10.Bh8 Nh6 (10...Bb4 11.Be5+–) 11.h4 (11.Bf6 Be7 12.Be7 Qe7+–) 11...b5 (11...Bb4 12.h5 Nf5 13.hg6 hg6 14.Be5+–) 12.Nh3 (better is 12.Bf6!? Be7 13.Be7 Qe7+–) 12...Bb4 13.Ng5 Ba6 (13...Be7+–) 14.Qf7 (better is 14.Nh7 Bd6 15.Nf6 Ke7 16.Nd5 Kd7 17.Nf6 Kc7 18.Bg7+–) 14...Nf7–/+ 15.Ne6 Qc8 16.Nf4?? (better is 16.a3 Bd2! 17.Nd2 Qe6 18.Bd4–/+) 16...Nh8–+ 17.0–0 Nf7 18.a3 (18.h5 gh5 19.Nh5 Kd8–+) 18...Bd6 19.Ne2 Ne5 20.a4 (20.f4 Nd3 21.cd3 b4–+) 20...Qg4 (better is 20...Nd3 21.cd3 Qg4–+) 21.ab5 (21.Nd4 Nd3 22.cd3 b4–+) 21...cb5 (21...Nf3 22.Kh1 Qh4) 22.Ra6 (22.Bg6 Ng6 23.Ra6 Nh4 24.Ng3 Bg3 25.fg3 Qg3 26.Rf2–+) 22...Bc5 (22...Nf3 23.Kh1 Qh4) 23.Nbc3?? (23.Bb5 Kd8 24.f4+=) 23...h5 (23...Nf3 24.Kh1 Qh4) 24.Nd5?? (better is 24.Bb5 Kd8 25.f4+/– (25.Nd5?? Nf3 26.Kh1 Qh4)) 24...Qh4 (24...Nf3 25.Kh1 Qh4) 25.f4 (better is 25.Nc7 Kd7 26.Na8 Nd3 27.cd3+–) 25...Qg4?? (25...0–0–0 26.Be4 Rd6+/–) 26.Nf6+– Ke7 27.Ng4 Ng4 (27...Nd3 28.cd3 hg4 29.Nc3+–) 28.Bg6 Nh6 (28...h4 29.d4 Ne3 30.Rf3+–) 29.Bh5 Nf5 30.Nc3 (30.d4 Bd6 31.Bf3 Rd8+–) 30...Rh8 (30...Ng3 31.Nd5 Kd8 32.Bf3 Nf1 33.Kf1+–) 31.Nd5 Kf8 (31...Kd8 32.g4 Ng3 33.Rb1+–) 32.Nf6 (better is 32.Rf6 Kg8 33.Bf7 Kg7 34.Rf5 a5+–) 32...Ng3 33.Bg6 (33.Rb1 Kg7 34.Rb5 Nh5 35.Rb7 Kg6 36.Nd7 Bb6 37.Rba7 Kf5 38.Rb6 Rg8 39.Rb5 Kg4 40.Rh5 Kh5 41.Nf6 Kg6 42.Ng8 Kf5+–) 33...Rh6 (33...Rh1 34.Kf2 Nf1 35.Nd7 Kg7 36.Nc5 Nd2+–) 34.Nd7 Ke7 35.Nc5 Rh4 (35...Rh1 36.Kf2 Nf1+–) 36.Re6 (better is 36.Ra7!? Kf6 37.Ra6 Ke7+–) 36...Kd8 37.Ra1 (better is 37.Rf3 Rg4 38.Re8 Kc7 39.Bd3+–) 37...Kc7 (37...Rh1 38.Kf2 Ra1 39.Re8 Kc7 40.Kg3 a5+–) 38.Ra7 Kb8 39.Rb7 Kc8 40.Re8# 1–0. Ben,Reichelt – Franziska,Franzi, remoteschach.de, 2002. 4.Qf3 Nf6 5.Bd3 +=.

4.Nf3 a5 5.b5 c5 6.d4 b6 (6...c4!?=) 7.dc5+= Bc5?? (better is 7...bc5 8.Nbd2 c4+=) 8.Bg7+– 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

4.Nf3 a6 5.Be2 Nf6 6.a3 Be7 (6...c5 7.bc5 Bc5 8.c4=) 7.0–0 (7.c4 a5=) 7...0–0= 8.c4 h6 (8...dc4 9.Bc4 b5 10.Be2=) 9.c5 (9.Nc3 Nbd7+=) 9...Nbd7 10.Nc3 Re8 (10...b6 11.d4+=) 11.h3 (11.Na4 Qc7+=) 11...Nf8 (11...b6!? 12.d4 Qc7+=) 12.d4+/– Bd7 (12...N8d7 13.Na4+/–) 13.Qc2 Qc7 14.Bd3 Bc8 15.a4 (15.Ne2 N8d7+/–) 15...b6 16.cb6 Qb6 17.b5 (17.Ne5 Bb7+=) 17...ab5+= 18.ab5 Ra1 19.Ra1 Bb7? (19...cb5 20.Bb5 Bd7+=) 20.Qa4?? (better is 20.Na4 Qc7 21.Ne5+–) 20...Ra8= 21.Qb3 Ra1 22.Ba1 Qa5 23.Bb2 N8d7 24.bc6 Bc6 25.Nd2 Qb4 26.Qb4 Bb4 27.Kh2 (27.Ndb1 e5=) 27...Nb6 28.Nb3 Bd6 ½–½. Neumann,Frank – Klawitter,Bernd, OP–2012–0–02283, 2012.

4.Nf3 b5 5.Be2 Bb7 6.a4 a6 7.0–0 (7.Nc3 Nf6 8.Qb1 Nbd7=) 7...Nf6 8.c3 Be7 9.d3 Qc7 10.Nbd2 Nbd7 11.ab5 ab5 12.Ra8 Ba8 13.Nb3 0–0 14.Qd2 Bb7 15.Ra1 Ra8 16.Na5 Ba6 17.Nd4 c5 (17...Bd6 18.h3 (worse 18.Nac6 e5=+) 18...c5 19.bc5 Nc5 20.f4=) 18.bc5+= Bc5 19.Nab3 Be7 (better 19...Bd6!?+=) 20.Nb5!+– Qb6 (20...Bb5 21.Ra8 Pinning (21.Ra8 Deflection)) 21.c4 Bb7 22.Ra8 Ba8 23.Qa5 Qa5 24.Na5 dc4 25.Nc4 Bc6 26.Nd4 Bd5 27.Na5 Bb4 (27...Ba8 28.e4+–) 28.Ndc6 Bc6 (28...Bf8 29.e4 Ba2 30.Bc3+–) 29.Nc6 (29.Nc6 Bd6 30.g3+–) 1–0. Pierre – Stept, internet, 2019.

4.Nf3 Bd6?? 5.Bg7+– Nf6 6.Bh8 Be5 (6...Bb4 7.a3 Bd6 8.d4+–) 7.d4 (better is 7.Ne5!? Nbd7 8.d4 Ne4+–) 7...Ke7 (7...Bd6 8.a3+–) 8.Bf6 (better is 8.de5 Qh8 9.ef6 Qf6+–) 8...Kf6 (8...Bf6 9.Bd3 h6+–) 9.Ne5 Ke7 (9...Qg8 10.Qh5+–) 10.Qh5 Qf8 11.Qh7 Nd7 12.Nd7 Bd7 13.Qh4 Ke8 14.Nc3 White plans b5 14...e5 15.b5 cb5 16.Bb5 Bb5 17.Nb5 Qb4 18.c3 Qb2 19.0–0 Qb5 20.Qh8 Ke7 21.Qa8 Qd7 22.Rab1 b6 23.de5 f5 24.ef6 Kf6 25.Rfd1 Qf5 26.Qc6 Ke7 27.Qd5 Qd5 28.Rd5 (28...Ke6 29.Rbd1+–) 1–0. Quilpo – paintcreek, Live Game Caissa's Web, 2005.

4.Nf3 f6 5.a3 Bd6 6.c4 dc4 7.Bc4 Ne7 8.Nc3 b5 9.Ba2 a5 10.ba5 Ra5 11.Nd4 Be5? (better is 11...Nd5!?=) 12.Ne6+/– Be6 13.Be6 Qd6 (13...Qd3 14.f4 Bc3 15.Bc3+/–) 14.Qg4+– g6 (better is 14...f5 15.Bf5 h5+–) 15.Ne4 Qc7 16.Be5 Qe5 17.d4 Qc7 18.Nf6 Kd8 19.0–0 Qd6 20.Ne4 Qc7 21.Rfd1 Qd6 22.Nd6 (22.Nd6 Kc7 23.Qf4+–) 1–0. Woelfelschneider,Peter – Fant, 2009.

4.Nf3 h6 5.a4 a5 (5...Nf6 6.b5=+) 6.b5 Nf6 7.c4 dc4 (7...Bd6 8.d4+=) 8.Bc4 Bd7 (8...cb5 9.Bb5 Bd7 10.Na3+=) 9.0–0 Be7 10.Nc3 cb5 11.ab5 0–0 12.Qb3 b6 (12...Be8 13.d4+–) 13.Ne5 Bc5 (13...Bd6!? 14.f4 Bc8+–) 14.d4+– Bb4 15.Nf7?? (better 15.h3+–) 15...Rf7= 16.Be6? (better 16.d5 e5 17.d6=+) 16...Be6–+ 17.Qe6 Raa7 (17...Qe7 18.Qb3–+ (18.Qb6 Bc3 19.Bc3 Nd5–+)) 18.Na4 (18.Rac1 Rae7 19.Qb3 Re8–+) 18...Rae7 (18...Qd7 19.Qc4 (19.Qb6?? Rb7 20.Nc5 Rb6 21.Nd7 Nbd7–+) 19...Rc7 20.Qd3–/+) 19.Qb6–/+ Qb6 20.Nb6 Rb7 21.Nc4 Rb5 22.Rfc1 Ne4 (22...Rc7 23.f3–/+) 23.f3 Nd2 24.Ne5 Re7 (24...Rf8 25.Ra2–/+) 25.Rc8=+ Kh7 26.e4 Nd7 (26...Reb7 27.Nd3=+) 27.Nc6 Re6 (27...Rf7 28.Nb4 ab4 29.Rc2=+) 28.Nb4= ab4 (28...Nb6 29.Rc2 Nb3 30.d5=) 29.d5 (29.Rc7 Rg6 30.Rd7 Nf3 31.Kf2 Nh2=) 29...Rg6 (better 29...Reb6=) 30.Raa8+– Rg5 (30...Rgb6!? 31.Rc7 Rb7+–) 31.f4+– 1–0. DEFFM – GuestVCLT, freechess.org, 2019.

4.f4 h5 5.Nf3 (5.a3 a5=) 5...Nf6 6.a3 Ne4 (6...a5 7.b5=) 7.Nc3+= Nd6 8.Bd3 f5 (8...h4!?+=) 9.Nd4 (9.0–0 Nd7+–) 9...Nf7 (9...Na6!?+–) 10.0–0 (10.Qf3 h4 11.0–0 g5+–) 10...g5 (10...h4 11.Rf3+–) 11.Nce2 h4 (11...Rh6 12.c4+–) 12.fg5 (12.Ne6 Be6 13.Bh8 Nh8+–) 12...Qg5 (12...Rg8 13.Nf4 Qg5 14.Rf2+–) 13.Nf3 Qg4 (13...Qg8 14.Bh8 h3+–) 14.Bh8 Nh8 15.Nf4 Bh6 (15...Ng6 16.h3 Qg3 17.Nd4 Nf4 18.ef4+–) 16.h3 (16.Qe1 Bf4 17.ef4 Qf4 18.Nh4 Qd4 19.Kh1 Kd8+–) 16...Qg7 17.Nh4 Nd7 (17...Nf7+–) 18.Ne6 (better 18.Qh5 Nf7 19.Ne6+–) 18...Qg3 (18...Qe5 19.Qh5 Nf7 20.Bf5 Nf6+–) 19.Nf5 Qe5 20.Qh5 Nf7 21.Nd6 Ke7 22.Nc8 Rc8 23.Rf7 Ke6 (23...Kd6 24.Rd7! Kd7 25.Nc5 Ke7 26.Qe5 Kf7 27.Rf1 Kg8 28.Qe6 Kh8 29.Qh6 Kg8 30.Qh7) 24.Bf5 Kd6 (24...Qf5 25.Qf5 Kd6 26.Rd7) 25.Rd7 1–0. gho8811h – biupyb, private online chess game, 2018.

4.Qg4 Nf6 5.Bf6 (5.Qh4 Be7=+) 5...Qf6–/+ 6.Nc3 (6.c3 Nd7–/+) 6...Bd6 (6...h5!? 7.Qf3 Qf3 8.Nf3 Bb4–/+) 7.Rb1 0–0 8.Bd3 e5 9.Qh5 Threatening mate... how? 9...g6 10.Qf3 (10.Qh6 Re8 11.Nh3 Bf8–/+) 10...Qg7 (10...Qe7!? 11.b5 e4 12.Be4 de4 13.Qe4–+) 11.Qg3 Be6 (11...f5 12.Be2–/+) 12.Nf3 (12.a4 f5–/+) 12...Nd7 (12...f6!?–/+) 13.0–0 Rae8 14.Ng5 Bb8 15.Ne6 Re6 16.e4 d4 (16...f5 17.Qh3 g5 18.f3=+ (18.ed5? Rh6 19.Qe3 e4–+)) 17.Nd1 (better 17.Ne2=) 17...f5?? (better 17...Qh6 18.Bc4 Rf6=) 18.Bc4+– Rfe8 19.Be6 Re6 20.ef5 gf5 21.Qg7 (21.Qh3 Qg6+–) 21...Kg7 22.f4 e4 23.b5 c5 24.Rb3 c4 25.Rg3 Kf6 26.Rh3 Kg6 27.Nb2 Nb6 28.a4 e3 29.a5 Nd5 30.Rg3 (30.Nc4 Bf4 31.de3 de3 32.Rf4 e2 33.Rg3 Kf6+–) 30...Kf6+= 31.Nc4 e2? (better 31...Bf4!? 32.Rgf3 ed2 33.Nd2 Re2+=) 32.Re1+– Bf4 33.Rf3 Bh6 (better 33...Nb4 34.Rf4 Nc2+–) 34.Kf2 Nc7 35.b6 (35.Rb3!? Nd5+–) 35...ab6 36.ab6 Nd5 (36...Rc6 37.d3 (worse 37.Ke2 Nd5 38.d3 Ne3+–) 37...Nd5 38.Re2+–) 37.Re2 Re2 38.Ke2 Ke6 39.Ra3 Bf8 (39...Nf4 40.Kd1 Kd5+–) 40.Ra7 Bc5 (40...Be7 41.Rb7 h5 42.Ra7+–) 41.Rb7 (41.Rb7 h5 42.Rb8 Nb6 43.Nb6+–) 1–0. Dingbat (2145) – DiplPsych (1885), ICS, 1998.

4.a3 b6

5.Nf3 Nf6 6.Be2 Be7 7.0–0 0–0 8.d4 Qc7 9.c4 Bb7 10.Nbd2 Nbd7 11.cd5 cd5 12.Rc1 Qd8 13.Ne5 Rc8 (13...a5 14.b5=) 14.Nd7 (better is 14.Rc8!? Qc8 15.Qa4+/–) 14...Qd7= 15.Rc8 Rc8 16.Qb3 Bd6 17.Rc1 (better is 17.Qd3!?=) 17...Rc1–/+ 18.Bc1 Qc6 (better is 18...Qc7!? 19.Bb2 Bh2 20.Kf1 Bd6–/+) 19.Bb2= Bc7 20.g3 Nd7 21.Qc3 Qc3 22.Bc3 e5 23.de5 Be5 24.Be5 Ne5 25.Bf3 Nc4?? (better is 25...b5=) 26.Nc4+– dc4 27.Bd1?? (better is 27.Bb7 g5 28.Kf1+–) 27...c3 (better is 27...Be4–+) 28.Bc2+= Kf8 29.Kf1 Ke7 30.Ke2+= Kd6 31.Kd3+/– Kd5 32.Kc3+– g6 33.e4 Ke5 34.f4 Ke6 35.e5 h6 36.Kd4 f6 37.ef6 Kf6 38.Be4 Ba6 39.a4 b5? 40.a5 g5 41.fg5 Kg5 42.Ke5 Kg4 (42...Kg4 43.Bg2 Bc8+–). Fournier,Frederic (1660) – LORDHAYDEN (1835), Active, 2006.

5.g4 Bb7 (5...a5 6.b5=) 6.Nf3= Nd7 7.Rg1 f6 8.h4 Bd6 9.g5 e5 10.Bh3 f5 (better 10...Qe7!?=+) 11.Bf5+– Ne7 (11...Qc7 12.e4+–) 12.Be6 (better 12.Bd7!? Qd7 13.Ne5+–) 12...Nf8 13.Bh3 Nd7 (13...Qc7 14.h5+=) 14.c4 (14.Bd7 Qd7 15.Ne5 Qf5 16.Qh5 g6 17.Ng6 Qg6 18.Qg6 Ng6 (18...hg6?? 19.Bh8 Nf5 20.Rh1+–) 19.Bh8 Nh8+–) 14...d4 (better 14...0–0!? 15.d3 a5+=) 15.ed4+– ed4 (15...e4 16.Ne5 Be5 17.de5 Ng6 18.Bd7 Qd7+–) 16.Nd4 0–0 (16...Ne5 17.Ne6 Qb8 18.Qe2+–) 17.Ne6 Qe8 (17...Qb8 18.Nf8 Nf8+–) 18.Ng7 (18.Nf8?! Nf8 19.Qb3 Neg6 20.Kd1 Qf7+–; 18.Bg7 Nf5 19.Bf8 Qe6 20.Qe2 Qe2 21.Ke2 Nd4 22.Kd1 Nf8+–) 18...Nf5 (18...Qb8 19.Nh5 Be5+–) 19.Ne8 Rfe8 (19...Rae8 20.Kf1 Ne5 21.g6+–) 20.Kf1 Nd4 21.Bd4 Be5 22.Be5 (better 22.Bd7 Bd4 23.Be8 Re8+–) 22...Ne5 23.d4 Nc4 24.Nc3 (24.g6!? Ba6 25.gh7 Kh8 26.Rg8 Kh7 27.Re8 Re8 28.Bf5 Kg7+–) 24...c5 25.d5 (25.g6 cb4 26.gh7 Kh8 27.Rg8 Rg8 28.hg8R Kg8 29.Qg4 Kf8 30.Qf4 Kg7 31.Qg5 Kf8 32.Qf6 Kg8 33.Be6 Kh7 34.Qf5 Kh8 35.Qh5 Kg7 36.Qg5 Kf8 37.Qf6 Ke8 38.Qf7 Kd8 39.Qd7) 25...Bc8 26.Bc8 Rac8 27.Qd3 (better 27.d6 Re5 28.Qb3 b5 29.Nb5 Re4+–) 27...Rcd8 28.Qc4 Re5 29.d6 (better 29.g6 hg6 30.Qf4+–) 29...Kf8 30.Rd1 (30.g6 Re7 31.de7 Ke8 32.Qf7 Kd7 33.e8N Kc6 34.b5) 30...Rf5 31.Qe6 Rf7 32.Nd5 (32.g6 Rc7 33.gh7 Rg7 34.h8Q Rg8 35.Qeg8) 32...Kg7 (32...Kg8 33.g6 hg6 34.Qg6 Kh8 35.Qh5 Rh7 36.Qe5 Rg7 37.Qg7) 33.Ne7 (33.g6 hg6 34.Qg6 Kh8 35.Qf7 Rd6 36.Rg8) 33...Rdf8 34.Nf5! Rf5 35.Rg2 (35.g6 Rf2 36.Ke1 Re8 37.gh7 Kh8 38.Qe8 Rf8 39.Qf8 Kh7 40.Qg7) 35...R5f7 36.d7 (36.g6 Rf2 37.Rf2 h6 38.Rf7 Kg8 39.Rf8 Kf8 40.Qf7) 36...Rd8 (36...cb4 37.Qh6 Kg8 38.g6 Re7 39.gh7 Kh8 40.Qf8 Kh7 41.Qg8 Kh6 42.Qg6) 37.Qh6 (37.g6 h5 38.Qf7 Kh6 39.Qh7) 37...Kg8 38.Qd6 (38.g6 Rg7 39.gh7 Kf7 40.Rg7 Kf8 41.h8Q) 38...Rdf8 39.g6 Rf2 (39...Re7 40.Qe7 Rf2 41.Kf2 hg6 42.d8Q) 40.Rf2 (40.Rf2 Rf2 41.Kf2 Kg7 42.Qe7 Kg6 43.Qe6 Kg7 44.Rg1 Kf8 45.d8Q) 1–0. FeegLood (2675) – JakubSmetana (1905), lichess.org, time forfeit, 2015.

4.a3 Be7??

5.c4?? dc4?? (5...Nf6 6.Nf3=) 6.Bc4?? (better 6.Bg7!? Bf6 7.Bh8 Bh8 8.Ra2+–) 6...f6 (6...Nf6 7.Qf3=) 7.Qb3 (7.Qg4 Kf7+–) 7...Nd7 (better 7...Kf7!?+=) 8.Be6+– Nh6 9.Ne2 c5 10.Nbc3 (10.0–0 cb4 11.ab4 Qb6+–) 10...cb4 11.ab4 b6? (better 11...Ne5 12.Bc8 Nd3 13.Kf1 Rc8 14.Ra7 Qd7+–) 12.Bd5+– Rb8 13.Ra7 Bd6 (13...Ne5 14.Nb5 Kf8+–) 14.Nb5 Nf7 (14...Qe7 15.Ned4 Qf8+–) 15.Bf7 Kf8 16.Nd6 h6 17.Nf4 Ne5 (17...g6 18.Bg8! Qe7 19.Ng6 Kg7 20.Ne7 Ne5 21.Nef5 Kg6 22.Rg7 Kh5 23.Qf7 Nf7 24.Bf7) 18.Be5 fe5 (18...Bf5 19.Nf5 Qd2 20.Kd2 Rd8 21.Nd6 fe5 22.Ne6) 19.Ng6 1–0. moss42 (2450) – SleepyFudgie, ChessWorld.net, 2013.

5.Bg7 Bf6 6.Bh8 Bh8 7.Nc3 Nd7 8.Nf3 Ndf6 9.d4 Qe7 10.Bd3 Bd7 11.Ne5 0–0–0 12.Nd7 Rd7 13.Qf3 Ne8 14.Bh7 1–0. machete99 – Player, Blitz, ICC, 2002.

4.a3 f5

5.c4 Nf6 6.c5 b6 7.d4 Ba6 8.Ba6 Na6 9.Ne2 Be7 10.0–0 Nb8 11.Nd2 Nbd7 12.f3 Nf8 13.Qc2 Qc7 14.cb6 ab6 15.Rfc1 Rc8 16.b5 c5 17.dc5 Qc5?? 18.Qb3 1–0. Allain,Michael A – Lambert,Derek, O–3151 IECC, 2010.

5.c4 Nf6 6.Nf3 Bd6 7.d4 0–0 8.c5 Bc7 9.Nc3 Ne4 10.Bd3 Nd7 11.Ne2 Ndf6 12.0–0 Bd7 13.Nf4 g5 14.Ne2 Be8 15.Ne5 Nh5 16.f3 Nef6 17.Qe1 g4 18.fg4 Be5 19.gh5 Bc7 20.Nf4 Bf4 21.ef4 Qd7 22.h6 Ng4 23.h3 Nh6 24.Qh4 Qg7 25.Rae1 Rf6 26.Re2 Kh8 27.Rf3 Rg6 28.Rfe3 Bd7 29.a4 Ng8 30.g4 Nf6 31.Qe1 Rg8 32.g5 h6 33.h4 hg5 34.hg5 Rh6 35.Rg3 Rh7 36.Rh2 Rh2 37.Kh2 Nh7 38.Rh3 Rf8 39.Rh6 Re8 40.Be2 Re7 41.Bh5 Qf8 42.Qh4 Qg7 43.Kg3 Be8 44.Be8 Re8 45.Qh5 Re7 46.g6 Qg8 47.Qh4 1–0. Luzuriaga – Ato del Avellanal, III Copa Peru, 2000.

5.Be2 Nf6 6.Bh5 (6.Nf3 a5=) 6...g6 7.Be2 Bd6 8.c4 (8.Nf3 Nbd7=) 8...0–0 (8...dc4 9.Bc4 0–0 10.Qb3=) 9.cd5 (9.c5 Be7+=) 9...ed5 (9...Nd5 10.Nf3=) 10.Nf3 Qe7 11.0–0 Nbd7 (11...b5 12.Nd4=) 12.h3 (12.Nc3 f4=) 12...Ne4 (12...f4 13.ef4 Qe4 14.Re1=) 13.d3 Ng5 (13...Nef6 14.Nc3=) 14.Nbd2 (14.Ng5 Qg5 15.Nd2 f4=) 14...Nf3 15.Nf3 Ne5 (15...g5 16.Nd4=) 16.Nd4 (16.Ne5 Be5 17.Be5 Qe5 18.d4=) 16...Qg5 (better 16...f4!?=) 17.f4+– Qg3 18.fe5 Qe3 19.Kh1?? (better 19.Rf2 Qe5 20.Rf3+–) 19...Qe5–/+ 20.Nf3? (better 20.Kg1 Re8 21.Re1 Qh2 22.Kf1=+) 20...Qb2–+ 21.d4 Bd7 0–1. GuestGXMT – GuestNTHH, freechess.org, 2016.

5.Nf3 Nf6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 c6).

5.Qh5 g6 6.Qd1 Nf6 +=.

5.Qh5 g6 6.Qf3 Nf6 7.g4 (7.c4 Bd6=) 7...h6 8.gf5 ef5 9.h4 Rg8 10.c4 (10.Ne2 Bd6=+) 10...Be6 11.c5 Be7 (11...d4 12.Qg2 de3 13.de3=+) 12.Ne2= Nbd7 13.Nf4 (13.Nd4 Bf7=) 13...Bf7 14.h5 g5 15.Ng6 Be6 16.Bd3 (16.Nc3 Ne4=) 16...Ne4=+ 17.Nc3 Bf6 18.Be4 (18.Bc2!?=+) 18...fe4 19.Qg3 Bf7 (19...Bf5 20.Rb1–/+) 20.0–0–0 (20.d4 Bg6 21.hg6 Rg6–/+) 20...Bg6 21.hg6 Rg6 22.f4 ef3 23.Qf3–/+ Ne5 24.Qh5=+ Kf7 25.d4 Nc4 26.e4 Nb2 27.Kb2 de4 28.Ne4+= Qd5 29.Nd6 Kg7 30.Qg4 Rd8 31.Nf5 Kh7=+ 32.Rh2 Re8 33.Rdh1 Bg7 34.Ng7 Kg7 35.Rd1 Re3–+ 36.Kb1 Rge6 37.Qh5 Qb3 38.Rb2 Qd1 39.Qd1 Re1 40.Rd2 Rd1 41.Rd1 g4 42.b5 Kf7 43.a4 Ke7 44.a5 cb5 45.d5 Rg6 46.d6 Kd8 47.a6 ba6 48.c6 Rg8 (49.Kb2 g3–+) 0–1. Valles,A – Romo,A, Jaque–Teruel, 1992.

4.a3 Nf6

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

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

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

4.a4 a6

5.c4 Nd7 6.Nf3 h6 (6...Ngf6 7.Qb3=+) 7.Be2 (7.a5 dc4 8.Bc4 Ngf6=) 7...Ngf6 (7...dc4 8.Bc4 Nb6 9.Be2=) 8.b5 a5 (8...ab5 9.cd5 ed5 10.ab5 Ra1 11.Ba1=) 9.0–0 (9.cd5 ed5 10.0–0 c5+=) 9...c5 (9...dc4 10.Bc4 Bd6 11.Nc3+=) 10.cd5 (better 10.d4+=) 10...e5? (10...ed5!? 11.Nc3 Bd6+=) 11.Qc2 (11.Ne5 Ne5 12.Be5 Nd5+–) 11...Bd6+– 12.Na3 (12.e4 Qe7+–) 12...0–0 (12...e4!? 13.Ne1 Qc7+–) 13.e4 (13.Nc4 Qc7+–) 13...b6 (13...Re8 14.Nc4 Qe7 15.Nh4+–) 14.Nc4+– Bc7 (better 14...Qe7+–) 15.d6 Bb8 16.Nfe5 Ne5 17.Be5 (17.Ne5?! Qd6 18.Bc4 Be6+–) 17...Ng4 (17...Be6 18.d4 Bc4 19.Bc4 cd4 20.Bg3 Bd6 21.e5+–) 18.Bg3 (18.Bb2 Ra7+–) 18...Re8 (18...f5 19.e5 f4 20.Qe4 fg3 21.hg3+– (21.Qa8?! gf2 22.Rf2 Nf2+–; 21.Bg4 gh2 22.Kh2 Qh4 23.Kg1 Qg4 24.Qa8 Qc4+–)) 19.e5 Be6 20.Bg4 Bg4 21.Qe4 Be6 22.Nb6 Qb6 (22...Ra7 23.Qc6+–) 23.Qa8 c4 (23...Bd7 24.Rab1+–) 24.Qc6 Qc6 (24...Qd8 25.Ra3+–) 25.bc6 Ba7 26.Rab1 1–0. DEFFM – GuestHDRZ, freechess.org, 2018.

5.Nf3 Nf6 6.b5 (6.Ba3 Bd6=) 6...Be7 (6...ab5 7.ab5 Ra1 8.Ba1=) 7.Be2 (7.Nc3 Nbd7=) 7...Bd7 (7...ab5 8.ab5 Ra1 9.Ba1 cb5 10.Bb5 Bd7 11.Nc3=) 8.0–0 (8.Nc3 0–0+=) 8...c5 (better 8...ab5 9.ab5 Ra1 10.Ba1 cb5=+) 9.c4+– a5 (9...ab5 10.ab5 Ra1 11.Ba1+–) 10.cd5 (10.Nc3 0–0+–) 10...Nd5? (better 10...ed5 11.Qc2 0–0+–) 11.Bg7+– (11.Bg7 Rg8 12.Bb2+–) 1–0. GuestXJBP – GuestASQS, freechess.org, 2020.

4.a4 Bd6

5.b5 e5 6.Nf3 Qc7 7.c4 Ne7 8.Be2 Bg4 9.h3 Bf3 10.Bf3 e4 11.Be2 0–0 12.0–0 Be5 13.Nc3 f5 14.Qc2 Ng6 15.f3 Nd7 16.fe4 fe4 17.cd5 cd5 18.Rf8 Rf8 19.Rc1 Qd6 20.Qb3 Nb6 21.Ba3 Qf6 22.Rf1 Qg5 23.Bf8 Nf8 24.a5 Qg3 25.Rf8 Kf8 26.Qb4 Kg8 27.Bg4 Qe1 0–1. RichardSommer (2000) – pjkon (1990), lichess.org, 2020.

5.Bg7 Ne7 6.Bh8 Bd7 (6...e5 7.c3+–) 7.Qh5 Qb6 (7...Ng6 8.Qh7 Bb4 9.Qg8 Bf8 10.Bg7+–) 8.Qh7 (8.c3 Ng6 9.Qh7 a5+–) 8...Qb4 9.Bd4 (9.Bc3 Qg4+–) 9...b6 (9...Nf5+–) 10.Qh8 (10.Qh8 Ng8 11.Qg8 Bf8 12.Nf3+–) 1–0. DEFFM – GuestLDKZ, freechess.org, 2018.

4.b5 cb5

5.Bb5 Nc6 6.Nf3 Nf6 7.0–0 Bd6 8.g3 (8.Be5 0–0 9.Bd6 Qd6=) 8...0–0+= 9.Nc3 a6 10.Bc6 bc6 11.Nd4 Bb7 12.Nce2 c5 13.Nf3 d4 14.Ne1 Be5 (14...Qb6 15.ed4 Qb2 16.dc5 Bc5 17.d4 Bd4 18.Qd4–/+) 15.ed4 Qd5 (15...cd4?! 16.f4 Bc7 17.Bd4= (worse is 17.Nd4 Bb6 18.c3 Rb8–/+)) 16.f3 cd4 (16...Bd4 17.Nd4 cd4 18.Nd3–/+) 17.c3 (17.Nd3 Rfd8=) 17...Ng4 (better is 17...dc3 18.Bc3 Rfd8–/+) 18.Nd3?? (better is 18.cd4 Bd6 19.fg4 Qh1 20.Kf2 Qh2 21.Ke3=) 18...dc3–+ 19.dc3 Ne3 20.Nb4 (20.c4 Qd8 (20...Nd1?! 21.cd5 Nb2 22.Ne5 Bd5 23.Rfb1–/+) 21.Qb3 Bb2 22.Nb2 Nf1 23.Rf1 Rb8–+) 20...Qd1 21.Rfd1 Nd1 22.Rd1 Bf3 23.Re1 (23.Kf2 Be2 24.Ke2 Rfc8–+) 23...Be2 (23...Rfc8!? 24.Nd3 Bf6 25.Kf2 Be2 26.Re2 Bc3 27.Ke3–+) 24.Re2 Bf6 25.Nd3 Rfd8 26.Nf2 Rd1 27.Nd1+– Rc8 28.Kf2 h6 29.Rd2 a5 30.Rd6 a4? 31.Ra6 Rc4 32.Ke2 g5 33.Kd3 Rc8 34.Ra4 1–0. Valpa – Mercator, playchess.de, 2004.

5.Bb5 Bd7 6.Qe2 Nf6 7.Nc3 (7.Nf3 Bd6 8.0–0 0–0 9.Be5 Bb5 10.Qb5 Be5 11.Ne5 Qc7+=) 7...a6 (7...Bd6 8.Nf3 0–0 9.0–0 e5 10.Rab1 Nc6 11.e4 d4+=) 8.Bd7 Nbd7 9.f4 (9.a4 Bd6 10.Nf3 0–0 11.0–0 Nc5=) 9...Bd6 (9...b5 10.a3 Nb6 11.d3 Rc8+=) 10.Nf3 0–0 (10...b5 11.a3 Nb6+=) 11.0–0 (11.a4 b6+=) 11...e5 (11...b5+=) 12.f5 (better is 12.Nb5!? ab5 13.fe5 Ne5 14.Ne5=) 12...Qc7–/+ 13.Ng5 h6 14.h4? (better is 14.Nh3–/+) 14...d4 15.ed4 ed4 16.Nce4 hg5 17.hg5 Ne4 18.Qe4 Rfe8 19.Qh4 (19.Qd3 Ne5 20.Qb3 Bc5–+) 19...Bg3 (better is 19...Qc2!? 20.g6 fg6 21.fg6 Qg6 22.Qh3–+) 20.Qh5 Re4 21.g6 fg6 22.fg6 Rh4 23.Qd5 Kh8 24.Rf3 Bh2 25.Kf1 Be5 26.Qf7 Rf4 27.Rf4–/+ Bf4 28.Bd4 Be5?? 29.Ke2 Nf6 30.Rh1 Bh2 31.Qc7 (31.Qc7 Re8 32.Kd3 Re5 33.Rh2 Rh5 34.Rh5 Nh5 35.Qd8#) 1–0. Steppuhn,Thomas (2045) – Wagner,Robert (1805), 10th Forchheim Open, 2011.

4.c4

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

4.c4 f5 5.Nf3 Nf6 6.a3 Bd6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 Bd6 6.c4 c6).

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

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

4.Nf3 Bb4??

5.Ne5?? Nf6–/+ 6.c3 Bd6 7.f4 0–0 8.c4 Nbd7 9.Nd7 Bd7 0–1. aaront03 – byron_de, ChessWorld.net, 2002.

5.Bg7+– d4 6.Nd4 e5 7.Nf3 e4 8.Nd4 c5 9.Nb3 c4 10.Nd4 Bg4 (10...Nh6 11.Bh8 Bg4 12.Qc1+–) 11.Be2 (better is 11.Qg4 Nf6 12.Qf5 Nbd7 13.Bh8 a6+–) 11...Be2 12.Qe2 Bc5 (12...Qg5 13.Qc4 Nc6 14.Bh8 Qg2 15.Rf1+–) 13.Bh8 Bd4 14.Bd4 Nc6 15.Qc4 Nd4 16.Qd4 Qg5 (16...Qd4 17.ed4 0–0–0 18.c3+–) 17.Qe4 Ne7 18.0–0 0–0–0 19.d4 (better is 19.Qc4 Nc6 20.Qf7 Rd7 21.Qe8 Kc7+–) 19...Qb5 (19...Nf5 20.Rd1+–) 20.Nd2 (better is 20.Qe7 Qd7 21.Qc5 Kb8+–) 20...Qb2 (20...Ng6+–) 21.Nb3 Qa2 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

5.Bg7+– Nf6 6.Bh8 Nbd7 7.Be2 +–.

4.Nf3 Nd7

5.Nc3 Ngf6 6.b5 Bd6=.

5.c4 Nb6 6.c5+= Nc4 (6...Nd7 7.d4+=) 7.Bc3+/– Ne7? (better is 7...a5!? 8.a3 Bd7+/–) 8.d3+– Nb6 (8...d4 9.Bd4 (9.dc4?! dc3 10.Nc3 Bd7+/–; 9.Nd4?! Ne5+/–) 9...e5 10.Bc3+– (10.dc4?! ed4 11.Qd4 Qd4 12.ed4 Bf5+–; 10.Ne5?! Ne5 11.Be5 Ng6+–; 10.Be5?! Ne5 11.Ne5 f6+–)) 9.cb6 Qb6 10.Be2 Nf5 11.Nbd2 Bb4 12.Rb1 c5 13.a3 Bc3 14.Rb6 ab6 15.0–0 (15.Qb3 Bd2 16.Nd2 Ra6+–) 15...Ra3 16.Nb1 Ne3?? (16...Ra1 17.Qb3 Bb4+–) 17.fe3 Ra1 18.Qb3 d4 (18...Bf6 19.Qb6 0–0 20.Qc5+–) 19.Nc3 (19.Nc3 Rf1 20.Kf1 dc3 21.Qb6+–) 1–0. Schirmer,Michael – Philippy,Marco, desc–online.de, 2003.

5.c4 Nb6 6.d3 (6.c5!? Nd7 7.Qc2=) 6...Bb4=+ 7.Nbd2 dc4?? (better is 7...f6=+) 8.Bg7+– cd3?? (better is 8...c3 9.Bh8 cd2 10.Nd2 Nf6+–) 9.Bh8 f6 (9...Nc4 10.Rc1 Nd2 11.Nd2+–) 10.Qb3 Bd2 11.Nd2 Qd5 12.Qb2 (better is 12.Qd3!? Qd3 13.Bd3 f5+–) 12...e5 13.g3 (13.Qb4 Be6+–) 13...Nd7?? (13...Qh1 14.Qb3 Nd5 15.Qd3 Be6=) 14.Rg1 (14.e4 Qd6 15.Bh3 Qf8 16.Bd7 Kd7+–) 14...e4 (14...Ne7 15.Bh3 f5 16.e4 fe4 17.Bg2+–) 15.Bg2 Ne5 16.Be4 Qd6 (16...Qf7 17.Qb4+–) 17.Qc3 (17.Bh7 Qf8 18.Bg8 Qg8 19.Bf6 Nd7+–) 17...Bg4 18.f3 Bh5 (18...Qf8 19.fg4 (19.Bh7 Qh6 20.Rf1 Bh3 21.Bg8 Qe3 22.Kd1 Bf1+/–; < 19.Bd3 Be6+–) 19...Ne7 20.Qb3+–) 19.Bh7 (better is 19.f4 Ng6 20.g4 Nh8 21.gh5 Ne7+–) 19...Bf3 (19...Qe7 20.Bg8 0–0–0 21.Bf6 Qf6 22.Rc1 Rg8 23.f4+–) 20.Nf3 (better is 20.Bg8 0–0–0 21.Qd4 Qd4 22.ed4 Rg8 23.de5 Rh8 24.Nf3 fe5 25.0–0–0+–) 20...Nf3 21.Kf2 Ng1 22.Rg1 (22.Bg8?! Nh3 23.Kg2 0–0–0 24.Qf6 Qf6 25.Bf6 Rg8 26.Kh3 c5+–) 22...Ne7 (22...Nh6 23.Rd1 (23.Bd3?! Ng4 24.Ke2 Ne5+–; 23.Qd3?! Qd3 24.Bd3 Kf7+/–) 23...Ng4 24.Kg1 Ne3 25.Rd3+–) 23.Bf6 (23.Bd3?! 0–0–0 24.Rd1 Rh8 25.Bf5 Nf5 26.Rd6 Nd6+–; 23.Qd3?! Qd3 24.Bd3 Kf7 25.Bf6 Kf6+/–) 23...0–0–0 24.Be7 Qe7 25.Bf5 Kb8 26.Rb1 d2 27.Qb3 (better is 27.Rd1 Rf8 28.g4 Qh4 29.Ke2 Re8+–) 27...d1Q? (27...b6 28.Rd1 Qf6+–) 28.Rd1 (< 28.Qd1 Rd1 29.Rd1 Qe5=+) 28...Rd1 (28...Rf8 29.e4 Ka8 30.Kg2+–) 29.Qd1 Qf6 30.Qf3 (30.Qd7 a5 31.Kf3 a4+–) 30...a6 31.g4 Qb2 32.Kg3 Qa2 33.e4 (33.Qf4 Ka8+–) 33...Qf7 (33...b5 34.Qc3 Kc7 35.g5+–) 34.e5 (34.Qf4 Ka7+–) 34...Ka7 (34...Qe7 35.Qe3 a5 36.e6+–) 35.e6 Qf6 (35...Qc7 36.Qf4 Qe7 37.h4+–) 36.Kg2 (better is 36.Qe3 c5 37.Qc5 Ka8 38.e7+–) 36...Qb2 (36...Qe7+–) 37.Kg3 (37...Qf6 38.Qe3 c5 39.Qc5 Ka8 40.e7+–; better is 37.Qf2 Qf2 38.Kf2+–) 1–0. OPA – PROBALLS, Live Game Caissa's Web, 2004.

5.c4 dc4 6.a4 (6.Bc4 Ngf6 7.b5=) 6...Qb6 (6...Ngf6 7.Nc3=+) 7.Bc4 (7.Na3!?+–) 7...Qb4+= 8.Qc2 Nb6 9.Bd3 a5 (9...Nf6!?+=) 10.0–0+– (10.Bh7?! Nf6 11.Bd3 Qg4=) 10...h6?? (better 10...Nd5+–) 11.Ba3+– Qa4 12.Qb2 Nc4 13.Qd4 Nb2 (13...c5 14.Bc5 Qd7 15.Bc4 Qd4 16.Bd4 Ne7+–) 14.Qb2 Qg4 15.Bf8 Kf8 16.Qb6 a4 (16...Nf6 17.Ra5 Ra5 18.Qd8 Ne8 19.Qa5 g6+–) 17.Qd8 1–0. GuestDQRS – GuestZPLV, freechess.org, 2019.

5.c4 Ngf6 6.a3 =.

5.Be2 Bb4 6.Bg7.

5.Be2 f6 6.0–0?? Bb4 7.Ng5?! Qe7 8.Bh5 g6 9.Bg4 Nf8 10.e4 e5 11.Bc8 Rc8 12.Qg4 Rd8 13.Nh3 Nh6 14.Qd1 de4 15.Re1 f5 16.Nc3 Bc3 17.Bc3 Nd7 18.d3 Nc5 19.Qc1 Nf7 20.de4 Ne4 21.Bb2 0–0 22.f3 Qc5 23.Qe3 Qe3 24.Re3 Nc5 25.Be5 Rfe8 26.Bd4 Re3 27.Be3 b6 28.Kf2 Na4 29.f4 Nc3 30.Ng1 Nd1 31.Ke2 Ne3 32.Ke3 Nd6 33.Kd3 Ne4 34.Kc4 Rd2 35.Kb3 Rg2 36.Nf3 Nd2 37.Nd2 Rd2 38.Re1 Rh2 39.Re7 a6 40.Re6 Rh3 41.Kb2 Rf3 42.Rc6 Rf4 43.Rb6 a5 44.Ra6 a4 45.a3 g5 46.Kc3 g4 47.Rd6 g3 48.Rd3 Rg4 49.Rd1 g2 50.Rg1 f4 51.Kd4 f3 52.Ke3 Rg3 53.c4 Rh3 54.c5 Kf8 55.Kf2 Ke7 56.Rd1 Rh1 0–1. Trkn – rts28, itsyourturn.com, 2000.

5.Be2 Ndf6 6.a3 Ne4 7.d3 Nef6 8.0–0 h5 (8...a5 9.ba5 Ra5 10.c4+=) 9.Nbd2 Ng4 10.h3 N4f6 11.c4 Bd6 12.cd5 cd5 13.e4 Qc7?? (better is 13...Bf4+/–) 14.e5+– Be5 (14...Bf8 15.Rc1 Qd8 16.ef6 Nf6 17.Ne5+–) 15.Be5 Qd7 16.Rc1 b6 17.Rc7 Qd8 18.Qc2 Ne7 19.Rc1 Nd7 20.Nd4 Ne5+= 21.N2f3 Nf3 22.Bf3 0–0 23.Bh5+= g6 24.Bg4 f5 25.Bf3 g5 26.Nb5 e5 27.g3 e4 28.de4 fe4 29.Bg2 g4 30.h4 Nf5?? 31.Na7 Ra7? 32.Ra7+– Nd4 33.Qc3 Ne2–+ 34.Kf1 Nc3 35.Rc3 d4 36.Rcc7 Qd5 37.Rg7 Kh8 38.Rh7 Kg8 39.Rag7 1–0. Fournier,Frederic (1800) – hugorg55 (1665), Active (5/0), 2005.

5.Be2 Ngf6 6.b5 =.

5.Be2 h6 6.0–0 f6 (6...Ngf6 7.b5=) 7.a3 g5 8.h3 h5? (8...Bd6 9.c4+=) 9.c4 (better is 9.Ng5!? Ke7 10.Bh5+–) 9...g4 10.hg4 (better is 10.Nd4!? Nb6 11.cd5 Nd5 12.h4+=) 10...hg4+= 11.Ng5 fg5?? (better is 11...Qc7 12.f4 gf3 13.Nf3 e5+=) 12.Bh8+– Ndf6 13.Bg4 (13.Qc2 a5 14.Qg6 Ke7+–) 13...e5 (13...dc4 14.Bh5 Ke7 15.Be2+–) 14.Bh5 Kd7 15.cd5 cd5 16.Nc3 Kc7 17.Rc1 Kb8 18.Bf3 Qe7 19.Bf6 Nf6 20.g3 Qh7? 21.Kg2 Qh3 22.Kg1 e4?? 23.Bg2+– Qg4? 24.Qg4 Bg4 25.f3 ef3 26.Bf3 Kc7 27.Nd5 Kd6 28.Nf6 Bf3 29.Rf3 Bh6 30.Ng4 Bg7 31.d4 Kd5 32.Nf6 Bf6 33.Rf6 Ke4 34.Kf2 g4 35.Ke2 Rh8 36.Rf4 Kd5 37.Rc5 Kd6 38.Rg4 Rh2 39.Kf3 Ra2 40.Rg6 Kd7 41.Rh5 Kc7 42.Rh7 Kb8 43.Rg8 1–0. Fournier,Frederic (1820) – hugorg55 (1645), Active (5/0), 2005.

4.Nf3 Ne7

5.Be2 Nd7 6.0–0 Nf5 7.c4 (7.b5 Bd6+=) 7...h6 (better 7...Bb4!? 8.cd5 cd5=) 8.cd5+= cd5 9.Qa4 f6 (9...Be7!?+=) 10.Nc3 Bd6 11.g4 (11.Qb3 Nb6+–) 11...Ne7 12.Nb5 Be5? (better 12...Bb8 13.Rfc1 e5+–) 13.Ne5+– fe5 14.Qc2 Kf7 15.Nc7 Nc6 (15...Rb8 16.f4 e4 17.Bg7 Rh7+–) 16.Na8 Nc5 Black plans e4 (16...Nb4 17.Qc7 Nc6+–) 17.Qc5 e4 18.f3 ef3 19.Rf3 Kg8 20.Raf1 Kh7 (20...e5 21.Bd3 Bf5 22.Rf5 Ne7 23.Qc7 Qe8 24.Qe5 Rh7 25.Qe6 Qf7 26.Rf7 Kh8 27.Re7 d4 28.Rf8) 21.Bd3 g6 22.Rf7 Kg8 23.Rg7 1–0. Pierre – Laclil, internet, 2020.

5.Be2 Nf5 6.a3 Be7 7.g4 Nh4 (7...Bf6!? 8.Bf6 Qf6=) 8.Nh4+/– Bh4 9.Bg7 Rg8 10.Be5 Nd7 11.Bg3 Be7 12.Nc3 Nb6 13.Rb1 Bd7 14.a4 a5 15.b5 Bf6 16.bc6 bc6 17.d4 Qe7?? (better is 17...Be7 18.Qd3 Bb4+=) 18.Rb6+– c5 (18...e5 19.h3 Qd8+–) 19.Nb5 Bb5 20.Bb5 Kd8 21.Qf3 cd4 (21...Rg6 22.Bd6 Qa7 23.Bc5 Qc7+–) 22.Bd6 Qa7 23.Qf6 Kc8 24.Rc6 Kb7 (24...Qc7 25.Rc7 Kb8 26.Rc6 Ka7 27.Qf7) 25.Qf7 1–0. pereira – anony, internet, 2014.

4.Nf3 f5

5.a3 Nf6 (--> 1.b4 f5 2.Bb2 Nf6 3.e3 e6 4.a3 d5 5.Nf3 c6).

5.a3 Nf6 6.Bf6 Qf6 7.d4 Bd6 8.Nc3 0–0 9.Bd3 Bd7 10.Qd2 Be8 11.Be2 Nd7 12.0–0 Bh5 13.g3 Bg4 14.Rab1 g5 15.Rfe1 Qh6 16.a4 Qh5 17.Qd1 Rf6 18.b5 Rh6 19.bc6 Bf3 20.Bf3 Qh2 21.Kf1 bc6 22.Rb7 Nb6 23.Qd3 Nc4 24.Bg2 Qh5 25.Reb1 f4 26.gf4 gf4 27.ef4 Bf4 28.Rd1 Rf8 29.Bf3 Qg5 30.Ke2 Rh2 31.Rh1 Rh1 32.Bh1 Qh6 33.Bf3 Bc1 34.Nd5 cd5 35.Ra7 Nb2 36.Qc3 Nc4 37.Rb7 Nd2 38.Bg2 Qf4 39.Qg3 Qg3 40.fg3 Nc4 41.Bh3 Re8 42.c3 e5 43.Bd7 Re7 44.Bc6 Rb7 45.Bb7 Kf8 46.Bd5 Nb6 47.Bb3 ed4 48.a5 Nc8 49.cd4 Ke7 50.a6 Kd6 51.Kd3 Kc6 52.Bg8 h6 53.Be6 Nd6 54.Kc2 Be3 55.Kd3 Bf2 56.g4 Kb6 57.Bc4 Nc4 58.Kc4 Ka6 59.Kd5 Kb7 60.Ke4 Bh4 61.Ke5 Kc7 62.Ke6 Kd8 63.Kd6 Ke8 64.Ke6 Kf8 65.Kd7 Kf7 66.d5 Kf6 67.Kd6 Kg5 68.Ke6 Kg4 69.d6 h5 70.Kd5 Kf3 71.Ke6 Bd8 0–1. mtra – dreitausend, Internet, 2002.

5.c4 Bb4?? 6.Bg7 dc4 7.Bc4 +–.

5.c4 Bb4?? 6.Bg7 Be7 7.cd5 (better 7.Bh8 Nf6+–) 7...Bf6 8.Bh8 (8.Ne5 Ke7 (8...Bg7?? 9.Qh5 Ke7 10.Qf7 Kd6 11.Nc4 Kc5 12.Qg7 cd5 13.d4 Kc6 14.Ne5 Kb6 15.Qh8+–) 9.Qh5 Be5 10.Be5 Nf6 11.d6 Kf8+–) 8...Bh8 9.d4 ed5 10.Bd3 (10.Nbd2 Qe7+–) 10...Be6 (10...c5 11.Bb5 Bd7 12.Bd7 Qd7 13.Nc3+–) 11.Nbd2 Nd7 12.Rb1 Qc7 (12...b6 13.h4 Ndf6 14.Ng5+–) 13.0–0 (13.Ng5!? Ke7+–) 13...0–0–0 (13...Ndf6 14.Ng5 Bd7 15.Qb3+–) 14.Qc2 (better 14.Ng5!? Re8+–) 14...Ne7 15.Qa4 (15.Ng5 Qd6+–) 15...a5? (15...Kb8 16.Ng5 Bg8 17.Qc2+–) 16.Rfc1 (16.Nb3!? Rg8 17.Na5 b6+–) 16...Rg8 17.Rb5! Kd8? (17...cb5 18.Qa5 Double attack (18.Rc7 Pinning; 18.Rc7 Deflection; 18.Qa5 Decoy)) 18.Qa5 (18.Ra5 Bf6+–) 18...Qa5 19.Ra5 Kc7 20.Nb3 Ng6 (20...Bf6+–) 21.Ng5 Ngf8 (21...Ndf8 22.Ne6 Ne6 23.Bf5+–) 22.Ne6 Ne6 23.Rd5 (23.Bf5!? Kd6+–) 23...f4 24.Bf5 Nef8 (24...Ndf8 25.Na5+–) 25.Bd7 (25.Na5!? Nb6 26.Rb5 fe3 27.fe3 Ng6+–) 25...Nd7 26.Nc5 (26.ef4 Rf8 27.Rh5 Rf7+–) 26...Nf6?? (better 26...cd5 27.Ne6 Kd6 28.Nf4 Ra8=+) 27.Rf5 Nd5 (27...fe3 28.fe3 b6 29.Nd3+–) 28.Ne6 (better 28.Rf7 Kc8 29.Nb7 Rg6+–) 28...Kd6 29.Nf4 Nf4 (29...Nf6 30.a4 Ra8 31.a5+–) 30.Rf4 Ra8 (30...Ke7 31.a4 Ra8 32.Rb1+–) 31.Rh4 Ra2 (31...Bf6 32.Rh7 Be7 33.Rc2+–) 32.Rh7 Bf6 33.Rb7 Ra8 (33...Ra6 34.g4+–) 34.Rb6 Rc8 (34...Kd5 35.Rc5 Kd6 36.Rcc6 Kd7 37.g4+–) 35.f4 Kd5 36.Kf2 Be7 37.Rb5! Kd6 (37...cb5 38.Rc8 Pinning (38.Rc8 Deflection)) 38.Rf5 Ke6 (38...Rh8 39.h3+–) 39.e4 Kd7 (39...Rc7 40.d5 Kd6 41.Ke3+–) 40.d5 c5 41.Ke3 (41.e5 c4 42.Rf7 Ke8+–) 41...Kd6 (41...Ra8 42.e5 Ra3 43.Kd2 Ra2 44.Rc2+–) 42.g4 (better 42.Rf7 Kd7+–) 42...Bf8 (42...Ra8+–) 43.Rf6 (43.Rf7 Rb8 44.Rd1 Rb3 45.Rd3 c4 46.Rb3 cb3 47.Rf8 Kc7+–) 43...Ke7 44.e5 Ke8 45.Kd3 (better 45.d6 Bg7 46.d7 Kd7 47.Rf7 Ke8 48.Rg7 Kf8+–) 45...Be7 46.Ra6 Kf7 (46...Bh4 47.g5 Rd8 48.Rc5+–) 47.d6 Bf8 48.Kc4 Bh6 49.Rca1 (49.d7 Rd8 50.Rh6 Kg8 51.e6 Ra8 52.e7 Ra4 53.Kc5 Ra5 54.Kb6 Rb5 55.Kb5 Kg7 56.d8Q Kh6 57.Qh8 Kg6 58.e8Q) 49...Bf4 50.Kd5 (better 50.Rf1 Rh8 51.Rf4 Kg6 52.d7 Kg5 53.e6 Rh3 54.d8Q Kf4 55.e7 Rh2 56.Qd6 Kf3 57.Qh2 Kg4 58.e8Q Kf3 59.Qee2) 50...Bh2 51.Ra8 Ra8 52.Ra8 Kg7 (52...Kg6 53.d7 Kg5 54.d8Q Kf4 55.Qf6 Kg3 56.Ra3 Kg4 57.Qg6 Kh4 58.Ra7 Bf4 59.Rh7 Bh6 60.Rh6) 53.d7 Kg6 (53...c4 54.d8Q Be5 55.Qg8 Kf6 56.Rf8 Ke7 57.Qf7) 54.d8Q Kh6 (54...Be5 55.Ke5 Kh6 56.Ra7 Kg6 57.Qf6) 55.Qh4 (55.Qf6 Kh7 56.Rh8) 55...Kg6 56.Qh2 (56.Rg8 Kf7 57.Qh7) 56...Kg5 (56...Kg7 57.Ra7 Kg8 58.Kc5 Kf8 59.Qh8) 57.Rf8 (57.Rg8) 57...Kg6 (57...Kg4 58.Ke4 c4 59.Rg8) 58.Qh5 (58.Rg8 Kf7 59.Qh7) 58...Kg7 59.Rf6 (59.Rf7 Kg8 60.Qh7) 59...Kg8 (59...c4 60.Qh6 Kg8 61.Rf8) 60.Qf7 (60.Qf7 Kh8 61.Rh6) 1–0. Gomes,Daniel De Oliveira – Mirela Pedro,Tereza (1770), 3rd Floripa Chess Open, 2017.

5.c4 Nf6 6.a3 dc4 7.Bc4 b5 8.Bb3 Bb7? (better 8...a5 9.Ng5 Qe7+–) 9.Be6 a5 10.Ne5 (10.Qc2 Bd6 11.Ng5 Qe7 12.Qf5 Nbd7+–) 10...Qc7 (10...Qe7 11.Bf7 Kd8 12.Ba2+–) 11.Bf7 (11.Nf7 Qe7 12.Bb3 Rg8+–) 11...Kd8 (11...Ke7 12.Bb3 c5 13.bc5+–) 12.Bb3 (12.Be6 Bd6 13.f4 Nbd7 14.Nf7 Ke7+–) 12...Nd5 (12...Ke8 13.Nf7 Rg8 14.Be5+–) 13.Qh5 g6 14.Ng6 Bg7 (14...Rg8 15.Qh4 Ke8 16.Nf8 Rf8 17.Nc3 ab4 18.ab4 Ra1 19.Ba1+–) 15.Nh8 Bb2 16.Nf7 Ke7 17.Ra2 Bf6 18.Ng5 Bc8 (18...Qd7 19.Nc3 Kd8 20.Nh7 Bc3 21.dc3 Kc7+–) 19.Bd5 Kd6 20.Bb3 a4 (20...Qg7 21.Nh7 Qg2 22.Rf1+–) 21.Bd1 Qg7 (21...Qe7 22.Nh7 Be6 23.Rc2+–) 22.Nh7 Qg2 (22...Be7 23.Rc2 Bd7 24.h4+–) 23.Bf3 Qg8 24.Nf6 Qe6 (24...Qa2 25.Nc3 Qe6+–) 25.Qh6 (25.Ne8 Kd7 26.Rg1 Qe8 27.Rg7 Qe7 28.Qf5 Kd8 29.Rg8 Kc7 30.Rc8 Kb7 31.Rc6 Nc6 32.Qb5 Kc8 33.Qc6 Kd8 34.Qa8 Kd7 35.Bg4 Qe6 36.Qd5 Ke7 37.Qe6 Kf8 38.Rc2 Kg7 39.Rc7 Kf8 40.Qf7) 25...Nd7 26.Ne8 Ke7 27.Qe6 (27.Qg5 Nf6 28.Bh5 Ra7+–) 27...Ke6 28.Nc7 Kf7 29.Na8 Ne5 30.Bh5 Ke6 31.d4 Nc4 32.Nd2 Nd6 33.Nb6 Ba6 34.Rc2 f4 35.Rc6 (35.Rc6 fe3 36.Ne4 Kf5 37.Nd6 Kg5 38.f4 Kf6 39.Nd5 Ke6 40.Nb5 Kd7 41.Rd6 Kc8 42.Ne7 Kb8 43.Rb6 Bb7 44.Nc6 Kc8 45.Bg4) 1–0. Pierre – Narimia, internet, 2020.

5.c4 Nf6 6.cd5 ed5 7.b5 Bd6 8.Nc3 0–0 9.a4 (9.Be2 Qe8=) 9...Nbd7 (9...a6 10.bc6 bc6 11.Be2=) 10.Qc2 Ne4 (10...f4 11.Be2=) 11.Ne4 (better is 11.bc6!? bc6 12.Ne4 de4 13.Qc6+=) 11...fe4=+ 12.Nd4 (12.bc6 ef3 13.cd7 Bd7 14.gf3 Rf3=) 12...Qf6 (better is 12...Ne5–+) 13.0–0–0? (better is 13.f4!? ef3 14.Nf3–/+) 13...Qf2 (13...c5 14.Ne2 Qf2 15.Kb1–+) 14.Nc6 (14.Ne6 Rf6 15.Bf6 Nf6–+ (15...gf6?! 16.bc6 Ne5 17.cb7 Bb7 18.Kb1=+; 15...Qf6?! 16.bc6 Qe6 17.cd7 Bd7 18.Kb1–/+)) 14...bc6 (better is 14...Nf6 15.h3 bc6 16.Qc6 Bg4 17.Qd6 Rac8 18.Bc3 Rc3 19.dc3 Qe3 20.Kc2 Bd1 21.Kd1 Qc3–+) 15.bc6?? (better is 15.Qc6 Nb6 16.Qd6–+) 15...Nc5 (15...Nf6 16.Kb1 Rb8 17.Ka1–+) 16.Qc3 (16.Bb5 Bf5–+) 16...Rf7 (16...Qf7 17.Bb5 Qe7 18.Rdf1–+) 17.Bb5 Na4 (better is 17...Ne6–+) 18.Ba4 a5?? (better is 18...Rc7–+) 19.Bb3 Bb4? (better is 19...Be6 20.Rhf1 A) 20...Qg2 21.Rg1 Qg6 22.Rg6 hg6 23.Qd4 Bh2 24.d3+– (< 24.Bd5 Bd5 25.Qd5 Ra6 26.Qd8 Kh7+–); B) 20...Qf1 21.Rf1 Rf1 22.Kc2 Rf7+=) 20.Qd4+/– Bg4 (20...Be6 21.Rhf1 Qf1 22.Rf1 Rf1 23.Kc2 Rf7 24.Bd5 Bd5 25.Qd5 Kf8+–) 21.Rdf1?? (better is 21.Bd5 Kh8 22.Bf7 Qf7 23.Rdf1+– (23.Qe4?! Bd1 24.Rd1 Rc8+=)) 21...Qg2 (better is 21...Qf1 22.Rf1 Rf1 23.Bd1 Rd1 24.Kc2 Rd2 25.Qd2 Bd2 26.Kd2 Rc8–+) 22.Bd5 (22...Qd2 23.Kb1 Qd4 24.Bf7 (24.ed4?! Bf3=; 24.Bd4?! Bf3+/–) 24...Kf8 25.Bd4+–) 1–0. reverendrev – fierce, Live Game Caissa's Web, 2004.

5.Be2 Bb4?? 6.Bg7 b6 7.Bh8 +–.

5.Be2 Nf6 6.a3 a5 =.

5.Be2 Nf6 6.a3 Bd6 7.d3 0–0 8.c4 Nbd7 9.Nbd2 b6 10.Qb3 Bb7 (10...a5 11.Nd4 Nb8 12.ba5 ba5 13.cd5 cd5 14.Nb5=) 11.h3 (11.d4 Ne4=) 11...Qe7 (11...a5 12.0–0=) 12.Qc2 (12.d4 e5=) 12...a5=+ 13.Qb3 (13.ba5 Ra5 14.d4 Rfa8=+) 13...a4 (better 13...ab4!? 14.ab4 Ra1 15.Ba1 Bb4–/+) 14.Qc2= b5 15.c5 Bc7 16.0–0–0 e5 17.Rdg1 e4 18.Ng5?? (better 18.Nd4 f4 19.de4 Ne4 20.Ne4 de4 21.Bg4+=) 18...h6–+ 19.Nge4 (19.g4 fg4 20.Nge4 de4 21.hg4 ed3 22.Bd3 Ne5–/+) 19...fe4 (19...Ne4?! 20.de4 fe4 21.f3=) 20.de4 Ne4 21.Ne4 Qe4 (21...de4 22.Rd1–+) 22.Bd3 (22.Qe4 de4 23.Rd1 Rad8–+) 22...Qe7 23.g4 Qh4 (23...Ne5!? 24.Rg2–+) 24.f4 Nf6 (better 24...Rae8!? 25.g5 h5–+ (25...Re3?! 26.gh6 Qh6 27.Bg7 Qg7 28.Rg7 Kg7 29.Qg2 Kf7 30.Qg5–/+)) 25.g5–/+ hg5 26.fg5? (26.Rg5 Rae8 27.Rhg1=) 26...Ne4 (26...Nd7!? 27.Bf5 Bc8 28.Rg4–+) 27.Rg4 Qf2 28.Be4 de4 (28...Qe3 29.Kb1 de4 30.Re4–+) 29.Qc3 (better 29.Qf2!? Rf2 30.Re4–/+) 29...Rf7–+ 30.g6 Re7 (better 30...Rd7–+) 31.h4?? (better 31.Re4 Rd7 32.Rd4–+) 31...Be5 32.Rf4 (32.Qc2 Qe3 33.Kb1 Bb2 34.Qb2–+) 32...Bc3 (better 32...Qg2 33.Re1 Bc3 34.Bc3 Qa2–+) 33.Rf2 Bb2 34.Kb2 Rf8 (34...Rd8 35.Rhf1–+) 35.Rd2 (35.Rf8 Kf8 36.Rd1 Ke8–+) 35...Bc8 36.h5 (36.Rhd1 Bg4 37.Rg1 Be6–+) 36...Bg4 (36...Ree8 37.Rd6–+) 37.h6? (better 37.Rh4 Bd7 38.Rd4–+) 37...gh6 38.Rh6 Rg7 (better 38...Re6!? 39.Rg2 Bf5 40.Kc2–+) 39.Rdh2 Rg6?? (better 39...Rd7 40.R6h4 Bf5 41.Rh8 Kg7 42.R2h7 Kg6 43.Rh6 Kf7 44.Rf8 Kf8 45.Rf6 Rf7 46.Rc6 Bg4–+) 40.Rh8 (better 40.Rg6 Kf7 41.Rg4+–) 40...Kf7–+ 41.Rf2 (41.R2h7 Rg7 42.Rf8 Kf8 43.Rh6–+) 41...Ke6 (better 41...Bf3 42.Rh7 Ke6–+) 42.Rhf8 Bf3 43.Rd2 Ke7 (43...Ke5 44.Rd7 Bg4 45.Rh7+–) 44.Ra8 (44.Rc8 Re6+–) 44...Kf6 (44...Re6+–) 45.Rd6 Kg5 46.Rdd8 (46.Rc8 Kf5 47.Rg6 Kg6 48.Rc6 Kf7+–) 46...Kg4? (46...Kf5 47.Rg8 Rh6 48.Rh8+–) 47.Rac8 (better 47.Rg8 Rg5 48.Rg5 Kg5 49.Rc8+–) 47...Kg3 48.Rh8 (better 48.Rd2 Bg4 49.Rf8+–) 48...Kf2+– 49.Kc2 (49.Rh2!? Ke3 50.Rd8+=) 49...Ke3= 50.Rcd8 (50.Rh2 Kf4=) 50...Kf4 (better 50...Rg2!? 51.Kb1 Ke2=+) 51.Rh2 Rf6 (51...e3 52.Rf8 Kg3 53.Rh7=) 52.Kc3 (better 52.Rd6!? Rf8 53.Rc6+–) 52...e3= 53.Rh4 (53.Rh7!?=) 53...Kg3–/+ 54.Re8?? (better 54.Rh7–/+) 54...Kh4–+ 55.Rh8 (55.Re3 Bd5 56.Kd4–+) 55...Kg4 (better 55...Kg3 56.Re8 e2 57.Kd2–+) 56.Rg8 (56.Re8 e2 57.Kd2 Kg3 58.Re2 Be2 59.Ke2 Rf3–+) 56...Kf4 57.Rh8 (57.Re8 Rf7 58.Re6 Bg4–+) 57...e2 58.Rh2 (58.Re8 Kg3 59.Kd2–+) 58...Ke3 59.Rh3 (59.Re2 Be2 60.Kc2 Bd3 61.Kc3 Be4 62.Kb2 Rf2 63.Ka1 Kd3 64.Kb1 Kc3 65.Ka1 Rf1 66.Ka2 Bd5) 59...e1Q 60.Kc2 Qe2 61.Kc1 Rf4 (61...Rg6 62.Rf3 Kf3 63.Kb1 Rg1) 62.Rf3 (62.Kb1 Rd4 63.Rf3 Kf3 64.Kc1 Rd1) 62...Rf3 63.Kb1 Rf1 0–1. Dino_Jarach (1825) – Safety_First1 (1715), lichess.org, 2019.

5.Be2 Nf6 6.a3 Bd6 7.d4 Nbd7 8.Nbd2 0–0 9.c4 Ne4 10.cd5 ed5 11.0–0 Qf6 12.h3 Rf7 13.Ne5 (13.Qc2!?=) 13...Ne5–/+ (13...Be5?! 14.de5 Qe7 15.Nf3=) 14.de5 Be5 15.Be5 Qe5 16.Nf3 Qf6 17.Re1 g5 18.Qd4 Qd4 (18...g4 19.Ne5 Re7 20.Nd3–+) 19.Nd4 g4 20.hg4 fg4 21.f3 gf3 22.Bf3 (22.gf3 Nd6–/+) 22...Ng5 23.Rf1 Bd7 24.Rae1 Raf8 25.Bh5 Rf1 26.Rf1 Rf1 27.Kf1 Ne4 28.Bf3 Nd2 29.Ke2 Nc4 30.a4 Kg7 31.b5 (31.e4 de4 32.Be4 Bg4 33.Bf3 h5–/+) 31...Kf6 32.bc6 bc6 33.Nb3 h6 34.Nc5 Bc8 35.Kd3 Ne5 36.Ke2 Kg5 37.Kf2 h5 38.Kg3 h4–+ 39.Kf2 Nc4 40.Ke2 Kf5 41.Kd3 Ne5 42.Ke2 Nf3 43.Kf3 Kg5 44.Nd3 Bg4 45.Kf2 Kf5 46.Nc5? Ke5–+ 47.Ke1 d4 48.ed4 Kd4 49.Nb3 Kc3 50.Na5 c5 51.Nc6 a6 52.Ne5 Be6 53.Nf3 h3 54.gh3 Bh3 55.Ng1? Bd7 56.Ne2 Kb4 57.Kd2 Ba4 58.Nc1 Bc6 59.Kc2?? a5 60.Kb2?? Bd5 61.Nd3+= Kc4 62.Ne5?? Kd4–+ 63.Nd7 c4 64.Nb6 c3 65.Kc1 Bb3 66.Nd7 a4 (66...a4 67.Nb8 a3 68.Nc6 Kc4 69.Na5 Kb4 70.Nc6 Ka4 71.Nd4 a2 72.Nc2 Bc2 73.Kc2 a1Q 74.Kd3 Kb3 75.Ke2 c2 76.Ke3 c1Q 77.Ke4 Qc6 78.Kf4 Qd4 79.Kg5 Qcf6 80.Kh5 Qd1) 0–1. Fournier,Frederic (1815) – guajaraz, Active, 2011.

5.Be2 Nf6 6.d3 Bd6 7.a3 0–0 8.Nbd2 Nbd7 9.c4 Qe8 10.cd5 ed5 11.0–0 Qg6 12.g3 Qh6 13.Re1 g5 14.Bf1 f4 15.ef4 gf4 16.Bg2 fg3 17.fg3 Ng4 18.Nf1 Ndf6? (18...a5 19.b5 Nc5=) 19.Bf6?? (better is 19.h3+–) 19...Nf6 (worse is 19...Rf6 20.h3+=) 20.Qd2 (20.Ne5 Bf5+=) 20...Qd2–/+ 21.N1d2 Bg4 22.Rf1 Nd7 23.Rae1 Rae8 24.Re8 Re8 25.Re1 Re1 26.Ne1 Bf5 27.Ndf3 Ne5 28.Ne5 Be5 29.Bf1 Bb2 30.Nc2 b6 31.Kf2 c5 32.bc5 bc5 33.Ke2 c4 34.Ke3 c3 35.Kd4?? Be6?? 36.Bg2+= Bf5 37.Bd5 Kf8 38.Be4 Bg4 39.Kc4 Bd1 40.d4 h5 41.a4 Ke7 42.h3 Kd6 43.g4 hg4= 44.hg4 Bg4 45.Bd3 Bd1 46.Be4 Bc2 47.Bc2 Ba1 48.Be4 Bb2 49.Kb3 Kc7 50.Kc4 Kd6 51.Kb5 c2 52.Bc2 Bd4 53.Bb3 Ke5 54.Bf7 Kf4 55.a5 Ke5 56.a6 Kf4 57.Bd5 Ke5 58.Bb7 Kf4 59.Bc6 Ke5 60.Bb7 Kf4 61.Bc6 Ke5 62.Bb7 ½–½. Fournier,Frederic (1845) – juanlana (1805), Active, 2007.

5.Ne5 Bb4? 6.Qh5 g6 7.Ng6 hg6 8.Qg6 Kd7 9.Bh8 +–.

5.Ne5 Nf6 6.a3 Bd6 7.c4 (7.Be2 Nbd7 8.f4 0–0=) 7...Nbd7 8.Nd7 Bd7 (8...Nd7? 9.Bg7 Rg8 10.Qh5 Ke7 11.Qh7+–) 9.c5 Be7 (9...Bc7 10.Be2=) 10.Be2 0–0 11.0–0 b6 12.d4 Qc7 (12...Qb8 13.Nd2=) 13.Nd2+= a5 14.h3 (14.Qc2 b5+=) 14...ab4= 15.ab4 b5 (15...Ra1 16.Qa1 Ne4 17.Nf3=) 16.Nf3+= Ne4 (16...f4 17.Ra8 Ra8 18.Bc1+=) 17.Ne5 (17.Qc2 f4+=) 17...Bf6 (17...Ra1 18.Ba1 Ra8=) 18.h4 (better is 18.Qd3!?+=) 18...Bh4+= 19.Bh5 (19.Ra8 Ra8 20.Qc2 Ra4–/+) 19...Ra1–/+ 20.Ba1 Bf6 21.Bf3 (21.Qd3 Be5 22.de5 Ra8–/+) 21...Ng5 22.Kh2 Nf7–+ 23.Rh1 Ne5 24.de5 Be5 25.Be5 Qe5 26.Kg1 Ra8 27.Qc2 Ra1 (27...Ra1 28.Bd1 Qe4–+) 0–1. Gonzalez Lopez,Vladimir – Rodriguez Cuende,Mario, Asturias–ch Oviedo, 2003.

4.Nf3 Nf6

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

5.a3 (--> 4.a3 Nf6 5.Nf3).

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

4.f4 Bb4

5.Bg7 d4 6.c3 dc3 7.Nc3 +–.

5.Bg7 Qh4

6.g3 Qd8

7.a3 Bd6 8.Bh8 Nf6 9.Nf3 Nbd7 10.Be2 e5 +–.

7.a3 Nf6 8.Bh8 Bd6 9.Nf3 Nbd7 10.Be2 Kf8 +–.

7.c3 Nf6 8.Bh8 Bd6 9.Nf3 Nbd7 10.Be2 c5 +–.

7.c3 Nf6 8.Bh8 Bd6 9.Nf3 Nbd7 10.Be2 Kf8 +–.

7.Nf3 Nf6 8.Bh8 Nbd7 9.c3 Bd6 10.Be2 c5+– 1–0. Janek – Vesely, internet, 2016.

7.Nf3 Nf6 8.Bh8 Nbd7 9.c3 Bd6 10.Be2 Kf8 +–.

7.Bh8 Nf6 8.Nf3 Bd6 9.Nc3 Nbd7 10.Bd3 Bb4 +–.

7.Bh8 Nf6 8.Nf3 Nbd7 9.c3 Bd6 10.Be2 Kf8 +–.

6.g3 Qe7

7.a3 Nf6 8.Bh8 Bd6 9.Nf3 Nbd7 10.d4 Qd8 +–.

7.Bd3 Nf6 8.Bh8 Nbd7 9.Nf3 Bd6 10.Nc3 Bb4 +–.

7.Be2 Nf6 8.Bh8 Nbd7 9.Nf3 Kf8 10.Bf6 Qf6 +–.

7.Nf3 Nf6 8.Bh8 Bd6 9.Nc3 Nbd7 10.Rb1 e5 +–.

7.Nf3 Nf6 8.Bh8 Nbd7 9.c3 Bd6 10.Be2 e5 +–.

7.Bh8 Nf6 8.Nf3 Bd6 9.Nc3 Nbd7 10.Bd3 Bb4 +–.

7.Bh8 Nf6 8.Nf3 Nbd7 9.c3 Bd6 10.Be2 e5 +–.

3.e3 Bf5

4.a3 a6 5.Nf3 Nd7 6.Be2 Ngf6 7.0–0 h6 8.Nd4 Bg6 9.f4 e6 10.c4 Be7 (10...dc4 11.Bc4 c5 12.f5 ef5 13.Nf5 cb4 14.ab4+=) 11.cd5 ed5 12.Nc3 0–0 13.Qe1 Bd6 14.Qg3 Re8 15.Qh4 Ne4 16.Qd8 Rad8 17.f5 Bh7 18.Ne4 Re4 19.Rac1 Rde8 20.Nb3 R4e7 (20...R8e7 21.g4=) 21.g3 (21.Na5 Rb8+/–) 21...Nb6 (better is 21...Ne5!?+=) 22.Bg7!+/– Kg7 (22...Re3 23.de3 Kg7 24.f6 Kf8 25.Kf2+/–) 23.f6+– Kf8 24.fe7 Re7 25.Rf6 Re6?? (better is 25...Be5 26.Rh6 Kg7+/–) 26.Re6+– fe6 27.Na5 Be5 28.Nb7 Bb2 29.Rc6 Nc4 30.Bc4 dc4 31.Rc4 (worse is 31.Re6 Ba3 32.Rh6 Bg8+–) 31...Ba3 32.Nc5 Ke7 33.Na6 Bd3 34.Rc3 (34.Rc3 Ba6 35.Ra3+–) 1–0. Fritz 11 – anony, internet, 2013.

4.a3 Nf6 5.Be2 e6 6.d3 Bd6 (6...a5!? 7.ba5 Qa5 8.Nd2 Nbd7=+) 7.g4+= Bg6 8.h4 (8.g5 Nfd7 9.Bg7 Rg8=) 8...h6 9.f4 0–0 (9...d4!?=) 10.g5+= Nfd7 11.h5 Bh7 12.gh6 gh6 13.Nf3 f6 14.Nd4 Kf7 15.Bg4 f5 16.Bh3 Qh4 17.Kf1 Rg8 18.Nd2 Nf6 19.Bg2 Qg3 20.Qf3 Qf3 21.N4f3 Nbd7 22.Re1 (22.c4 Rg3=) 22...Rg3 (22...a5 23.ba5 Ra5 24.Ne5 Be5 25.fe5=+) 23.c4 Rag8 24.Re2 Ke8 25.Bd4 b6 26.cd5 Nd5 27.Nc4 (27.Rh3 Rh3 28.Bh3 c5 29.bc5 bc5=+) 27...Bc7 (27...Bf4!? 28.Rh3 c5 29.bc5 bc5 30.ef4 Nf4 31.Rg3 Rg3–+) 28.Rh2 c5 29.bc5 Nc5 30.Bc5 bc5 31.Rc2 Bb6 (31...R3g7!?=) 32.Kf2+= Ke7 (32...Bc7 33.Rb2+=) 33.Bf1 (33.Nfe5!? R3g7 34.Bd5 ed5 35.Nb6 ab6 36.Rb2+–) 33...Nf6+= 34.Rg2 Rg2 35.Bg2 Ng4 36.Ke1 Rd8 37.Bf1 (37.Nfe5 Ne5 38.Ne5 Kf6+–) 37...Bg8 38.Rb2 (better 38.Nfe5!? Ne5 39.Ne5+–) 38...Rb8= 39.Nfe5 (39.Kd2 Ba5 40.Kc2 Rb2 41.Kb2 Bc7=+) 39...Ne5 (better 39...Ba5! 40.Kd1 Rb2 41.Nb2 Ne3 42.Ke2 Bc3 43.Ke3 Bb2–/+) 40.fe5= Bc7 (40...Ba5! 41.Kf2 Rb2 42.Nb2 Bc3=+) 41.Rb8+= Bb8 42.Bg2 Bf7 43.Bf3 Be8 44.Kd2 (better 44.d4!? Bb5 45.Na5+=) 44...Bb5=+ 45.Kc3 Bc4 46.Kc4 Be5 47.Kc5 Bd6 48.Kb5 Ba3 49.d4 Bc1 50.e4 Be3 51.d5 ed5 52.ef5 Kf6 53.Bd5 Kf5 54.Ka6 Kg5 55.Bf7 Kf6 56.Bg6 Bb6 57.Kb5 Kg5 58.Ka6 Kf6 59.Kb5 Kg5 60.Ka6 Kf6 ½–½. FeegLood (2500) – erindreki (2185), lichess.org, 2015.

4.a4 f6 5.b5 c5 (5...e5 6.Nf3=) 6.f4 e6 (6...Nh6 7.Nf3=) 7.Nf3 Bd6 (7...Nh6 8.Be2=) 8.Nh4+= Bg6 (8...Ne7 9.Nf5 Nf5 10.Bd3+=) 9.Ng6 hg6 10.Qf3 (10.Qg4 Kf7+=) 10...Ne7 (10...g5 11.Bd3=) 11.c4 Nd7 (11...Qc7 12.cd5 Nd5 13.Bc4+=) 12.Nc3+= Nb6 13.a5 Nc4 14.Bc4 dc4 15.Qb7 Bc7 16.Qe4 (16.Ra4 g5 17.b6 Bd6+–) 16...Kf7 (16...g5 17.fg5 (17.Qc4?! gf4 18.ef4 Qd4 19.Qd4 cd4+=) 17...Bh2 18.gf6 gf6 19.Qc4+–) 17.Qc4 Ba5 18.Qc5 (18.Ba3 Rc8+–) 18...Bb6 (18...Rh5 19.Qc4+=) 19.Qc4+– Nf5 20.Ne4 (20.Qf1 Rc8+–) 20...Rc8+= 21.Qb4 Qd5 (21...Qd3 22.Ba3+–) 22.Ra4+– Rhd8 23.0–0 Rc2 24.Re1 (24.Bc3 Rc8 25.Kh1 Ne3 26.Bf6 gf6 27.de3 Be3=) 24...Nd6 Exerts pressure on the isolated pawn (24...Rdc8 25.Qa3=) 25.Nd6+= Rd6 (25...Qd6 26.Qd6 Rd6 27.Bc3+=) 26.Bc3 Rd7 27.Qb1 Qd3 28.Rb4 Ba5 29.Rb2 Rb2 30.Qb2 (30.Bb2? Bd2 31.Qd3 Rd3–+) 30...Bc3 31.Qc3 Qb5 32.d4 Qb6 (32...g5 33.fg5 Qg5 34.Rb1+=) 33.Rc1+– Rb7 34.Qc8 (34.Qc2 Qb3 35.Qe2 a5+=) 34...Re7 (34...a5 35.Kf2+=) 35.h3 (35.Qc2 Rb7+–) 35...Qb3 36.Rc3 Qb4 37.Kh2 a5 38.Qc6 (38.Rc5 Qb6+–) 38...Qb7 (38...a4 39.Rc4 Qd2 40.Qe4+= (worse 40.Qa4 Qe3 41.Qc2 Qf4 42.Kg1 Ra7=+)) 39.Qc4 (39.Qc5 Qb4+=) 39...Qb4 40.Qc6 Qb7 41.Qc4 f5 (41...Qb4!?=) 42.Ra3 (42.Qa2 Qb4 43.Rc6 Qe1+–) 42...Qb4+= 43.Qa2 Qe1 (43...Ra7 44.Rb3 Qd6 45.Kg1+=) 44.d5 (better 44.Qc2+–) 44...Qb4? (better 44...ed5 45.Qd5 Kf8+=) 45.de6+– Re6 46.Ra5 Qd6 (46...Qb6 47.Re5+–) 47.Ra7 (47.Re5!? Ke7 48.Re6 Qe6 49.Qe6 Ke6+–) 47...Kg8+– 48.Ra8 (48.Qc4 Kh7 49.Qc3 Re7 50.Re7 Qe7+–) 48...Kh7 49.Qb3 g5 (49...Qb6 50.Qb6 Rb6 51.Kg3+–) 50.Qc2 (50.Qb5 Kg6 51.Ra5 Rf6 52.Qe8 Kh6+–) 50...gf4 (better 50...Rf6!? 51.Qe2 Kg6+–) 51.Qf5+– Rg6 52.ef4 Qd2 (52...Qf6 53.Qh5 Rh6 54.Qe5+–) 53.Qh5 Rh6 54.Qf3 (54.Qf7 Rf6 55.Qg8 Kg6 56.f5 Kf5 57.Qg7 Qf4 58.Qg3 Qg3 59.Kg3 Rd6+–) 54...Rf6?? (54...Qd4+–) 55.Qe4 (55.Qe4 Rg6 56.Ra6 Qf4 57.Qf4 Ra6 58.Qe4 Kh8 59.Kg3+–) 1–0. Dzieniszewski,Andrzej – Gohlke, Jelenia Gora Poland, 1976.

4.b5 e6 5.a4 (5.Nf3 a6 6.a4 Nf6=) 5...Nf6 6.c4 (6.Ne2 Bd6=) 6...dc4 7.Bc4 Be7 8.Nf3 0–0 (8...a6 9.0–0=) 9.0–0 (9.d3 cb5 10.ab5 Nbd7=) 9...c5 (9...cb5 10.Bb5 a6 11.Be2+=) 10.d4= Nbd7 11.Nbd2 b6 (11...Nb6 12.Be2=) 12.Nh4 (12.Qe2 Rc8+=) 12...Be4 (12...Bg4 13.f3 Nd5 14.Bd5 (14.fg4? Ne3 15.Qf3 Nf1 16.Rf1 Bh4–+) 14...ed5 15.fg4 Bh4 16.Rf5+=) 13.Ne4+= Ne4 14.Nf3 Rc8 15.Rc1 Rc7 16.Bd3 Nef6 17.e4 cd4 18.Rc7 (18.Nd4 Rc1 19.Qc1 Nc5=) 18...Qc7= 19.Bd4 ½–½. Klarius,G – Koehn,W, corr ICCF EU/M/Gr/839 (year?).

4.c3 Qd6 5.Nf3 Qg6 (5...e5 6.c4 Nd7 7.cd5 cd5 8.a3=) 6.d4 Bc2 7.Qc1 Bb1 8.Rb1 Qb1?? (better is 8...Nd7=) 9.Qb1+– e6 10.a4 Bd6 11.Bd3 Nf6 12.0–0 Ng4 13.h3 Nh2 (13...Nf6+–) 14.Nh2 Bh2 15.Kh2 h5 16.Kg1 g5 17.f4 gf4 18.ef4 f5 (18...Nd7 19.f5 0–0–0 20.b5+–) 19.Bf5! ef5 20.c4 (20.Qf5 Nd7 21.Re1 Kd8+–) 20...dc4 (20...0–0 21.Qe1 Na6 22.cd5 cd5 23.Qe6 Rf7 24.Qg6 Rg7 25.Qf5+–) 21.b5 (better is 21.Qf5!? Nd7 22.d5 0–0–0 23.Bh8 Rh8+–) 21...cb5 22.ab5 Nd7 23.Bc3 0–0–0 24.Qc1 Kb8 25.Re1 Ka8 26.Kh2 Rh7 27.Re2 Nf6 28.Qe1 Rdh8 29.Re7 Re7 30.Qe7 Ne8 31.Qe8 Re8–+ 32.Kg3 Rb8 33.d5 Rh8?? 34.Bh8+– h4 35.Kh2 a5 36.Be5 b6 37.d6 c3 38.Bc3 a4 39.Be5 (39.d7 Kb8 40.d8Q Kb7 41.Be5 a3 42.Qb8). Fournier,Frederic (2000) – BABO69 (1785), Active Blind, 2008.

4.c3 Qd7 5.Nf3 Nf6 6.d4 h5 7.Bd3 a5 8.Bf5 Qf5 9.a3 g6 10.0–0 Bh6 11.Nbd2 a4 12.Re1 (12.c4 0–0+=) 12...Qd7 (12...b5!?=) 13.e4 Bd2 14.Nd2 (14.Qd2?! Ne4 15.Qe3 b5=) 14...0–0 15.e5 Ne8 16.Nf3 Ng7 17.Bc1 Re8 18.Bd2 e6 19.Qe2 Qd8 20.h3 Nd7 21.Rad1 b6 22.Rc1 Qc7 23.Qd1 Rec8 24.Qc2 c5+= 25.dc5 bc5 26.Qb2 c4 27.Be3 Rab8 28.Rcd1 Nb6 29.Bb6 Rb6 30.Qd2 Rcb8 31.Nd4 Qe7 32.Kh1 Nf5 33.Nf5+/– ef5 34.f4 Rb4?? 35.cb4 Rb4 36.ab4 Qa7 37.Ra1 Qa8 38.Reb1 a3 39.Ra2 d4 40.Rba1 c3 41.Qd1 Qc8 42.Ra3 d3 43.Ra8 Qa8 44.Ra8 Kg7 45.Qd3 c2 46.Qc2 f6 47.ef6 Kf6 48.Ra6 Kf7 49.Qc6 Kg7 50.Qg6 (50.Qg6 Kf8 51.Qh7 h4 52.Ra8; 50.Qf6 Kg8 51.Ra8 Kh7 52.Qh8) 1–0. Fournier,Frederic (1950) – alforza (1990), Active, 2009.

4.c3 e6 5.a3 Bd6 6.Nf3 Nf6 7.Be2 h6 8.0–0 Nbd7 9.d4 Bh7 10.Bd3 Bd3 11.Qd3 0–0 12.Nbd2 Qc7 13.Qe2 (13.c4 Ng4 14.h3 Ngf6=) 13...Rfe8 (13...a5 14.e4 de4 15.Ne4 Ne4 16.Qe4+=) 14.Rfe1 a6 (14...a5 15.e4 e5 16.c4 de4 17.Ne5 Ne5 18.de5 Be5 19.Be5 Qe5 20.b5–/+) 15.h3 (15.c4 a5=) 15...e5 16.de5 Ne5 17.Ne5 Be5 18.Nf3 Rad8 19.Ne5 Qe5 20.c4 Qe7 21.cd5 Rd5 22.Bf6 Qf6 23.Rac1 Red8 24.Red1 Rd1 25.Rd1 Rd1 26.Qd1 Qe7 27.Qd4 h5 28.g3 h4 29.g4 g6 30.Qf4 Kh7 31.Kh2 b6 32.a4 c5 33.bc5+= bc5 34.a5 Qf8 35.e4 Qg7 36.e5+= Qf8 37.Qc1 Qe7= 38.f4 Kg7 39.Qc2 g5 40.f5?? Kh6 41.e6 fe6–+ 42.fe6 Qc7 43.Kg1 Qg3 44.Qg2 Qe3 (44...Qe3 45.Kh2 Qe6–+) 0–1. Fournier,Frederic (2020) – oscaralmagro (2110), Active Blind, 2008.

4.c4 a5 5.b5 (5.ba5 Ra5 6.Qb3 Qd7=) 5...dc4 (5...Nf6 6.Nf3=) 6.Bc4 Bd3 (6...Nf6 7.Qb3 e6 8.bc6 Nc6 9.Qb7=) 7.Qb3 Bc4 8.Qc4 cb5 (8...e6 9.Nf3=) 9.Qb5+= Qd7 10.Nc3 Nf6 11.Nf3 e6 (11...Nc6 12.Rb1=) 12.Ne5+= Qb5 13.Nb5 Na6 14.Nc4 (14.Rc1 Nd7+=) 14...Be7 (14...Nd5 15.Ke2+= (worse is 15.Na5 Nab4 16.Nc4 Nc2 17.Ke2 Na1 18.Ra1 Ra6+=)) 15.Nbd6 (15.Na5 Kf8 16.Ke2 Bb4+/–) 15...Bd6+= 16.Nd6 Ke7 17.Nb7 Rhb8 18.Rb1 (18.Bf6!? Kf6 19.Nd6+=) 18...Nb4= 19.Nc5 Na2 20.Ke2 Ke8 (20...Nb4 21.Be5 Rb5 22.d4=) 21.Bf6+= gf6 22.Rb8 Rb8 23.Ra1 Rb5 (23...Rb2 24.Kf3+=) 24.Ne4 (24.Ra2?! Rc5 25.d4 Rb5+=) 24...Rb2 25.Nf6 Ke7 26.Nh7 f6 (26...a4 27.h4+/–) 27.g4+– a4 28.f4 a3 29.Kd1 Nc3 (better is 29...Kf7 30.g5 fg5 31.Ng5 Ke7+/–) 30.dc3 a2 31.Kc1 Rh2 32.g5 fg5 (32...Rh7 33.Ra2 Rh1 34.Kc2 fg5 35.fg5+–) 33.Ng5 Re2 34.c4 Kd7 35.Nf3 Re3 (35...Ke7 36.Nd2+–) 36.Ne5 Kd6 37.Ra2 Re1 (37...Re4 38.Rd2 Kc7 39.Rd7 Kc8 40.Rf7+–) 38.Kd2 Re4 39.Ra6 Kc7 40.Ra7 Kd8 (40...Kd6 41.Rd7 Kc5 42.Rc7 Kb6 43.Rf7+–) 41.Nf7 Kc8 42.Nd6 (42.Nd6 Kb8 43.Ne4 Ka7 44.Nc5+–) 1–0. Brzoza,Miroslaw – Ewert,Jerzy, corr 2AMM Poland, 1994.

4.c4 Na6 5.a3 dc4 6.Bc4 Bd3 7.Qb3 Bc4 8.Qc4 Qd5 9.Qd5 cd5 10.Nf3 f6 11.0–0 e5 12.d3 Bd6 13.Nbd2 Ne7 14.Rfc1 0–0 15.Nb3 b6 16.Rc2 Rfc8 17.Rac1 Rc2 18.Rc2 Rc8 19.Rc8 Nc8 20.Nfd2 Nc7 21.f3 Ne7 22.h3 Kf7 23.Kf2 Ne6 24.d4 Nf5 25.g4 Ne7 26.e4 Nf4 27.de5 fe5 28.Kg3 d4 29.Nc1 Neg6 30.Nc4 Be7 31.b5 Ke6 32.a4 Bh4 33.Kh2 Be1 34.Nb3 Nh4 35.Nbd2 Ne2 36.Kh1 Nc3 37.f4 ef4 38.Kg1 f3 39.Kf1? f2 40.Ba1 Kf6 41.e5? Ke6 42.Bb2 Bd2 43.Nd2 Ke5 44.Kf2 Nd1 45.Kg3 Nb2 46.Kh4 Na4 47.Kg3 Nc3 48.Kf3 Nb5 49.Nc4 Kd5 50.Nb2 a5 51.Na4 Kc6 52.h4 Nc3 53.Nb2 b5 54.Kf2 a4 (54...a4 55.Nd3 a3–+) 0–1. Zielke,Bernd – Off,Karina, Schleswig Holstein–ch H, 2008.

4.c4 Bb1 5.Qb1 e6 6.Nf3 dc4 (6...Bb4?? 7.Bg7 Qe7 8.Bh8+–) 7.Bc4 Nf6 (7...Bb4?? 8.Bg7 Nf6 9.Bh8+–) 8.0–0 Bb4?? (better is 8...Nbd7+=) 9.Bf6+– Qf6 10.Qb4 Nd7 (10...Qe7 11.Qb2 0–0+–) 11.Qb7 Nb6 12.Qc6 Ke7 (12...Kf8 13.Ba6+–) 13.Qc5 Kd7 (13...Kd8 14.Bb5 Qe7 15.Qd4 Nd5+–) 14.Bb5 Kd8 15.Qd6 Kc8 (15...Nd7 16.Qd7) 16.Ba6 1–0. MrThayer (2195) – Jonnywildboar, ChessWorld.net, 2003.

4.d3 a6 5.Nf3 Nd7 (5...e6 6.Qd2=) 6.Nbd2 (6.a3 a5=) 6...h6 (6...Ngf6 7.Nh4 Bg4 8.f3=) 7.Be2 Ngf6 8.0–0 e6 9.a3 Be7 (9...a5 10.ba5 Qa5 11.c4=) 10.c4 0–0 11.Rc1 (11.c5 Re8+=) 11...Rc8 (11...c5 12.bc5 Nc5 13.Ne5=) 12.Qb3 (12.c5 a5+=) 12...b6 (12...c5 13.Bf6 Nf6 14.bc5 Bc5 15.d4+=) 13.cd5 cd5 (13...ed5? 14.Nd4 Be6 15.Rc6 Rc6 16.Nc6+–) 14.Nd4 Bg6 15.Nc6 Qe8 16.Ne7 Qe7 17.Nf3 (17.Qa4 Nb8+=) 17...b5 (17...Qd6 18.d4 b5 19.Ne5+=) 18.h3 (18.a4 e5+=) 18...e5= 19.Rfd1 (19.d4 e4 20.Ne5 Nb6=) 19...e4 (19...Bh5!?=) 20.de4+= Be4 (20...de4 21.Nd4+=) 21.Nd4 Nb6 22.f3 Bg6 23.Nc6 Qe6 24.Ne5 Nc4 (24...Bf5 25.Bd3=) 25.Nc4 (25.Ng6 fg6 26.Bd4 Nh5+=) 25...bc4 26.Qc3 Rfe8 (26...Bd3 27.Bd3 Qe3 28.Kf1 cd3 A) 29.Qc8?? Qe2 (29...Rc8?! 30.Rc8 Kh7 31.Re1=+) 30.Kg1 Rc8 31.Rc8 Kh7–+; B) 29.Qd3 Qd3 30.Rd3 Rc1 31.Bc1+=) 27.Kf2 (27.e4 Kf8=) 27...Qf5 28.Kg1 Qg5 (29.e4 Bf5=). Lueders,Horst – Kudoke,Willy, GER–chT Seniors, 1996.

4.d3 e6 5.Nd2 Nf6 (5...Bb4?? 6.Bg7 Bc3 7.Bc3+–) 6.a3 a5 7.Be2 Nbd7 8.h3 Be7?? (8...e5 9.Ngf3=+) 9.Ngf3?? (better is 9.g4 ab4 10.ab4 Ra1 11.Ba1+–) 9...ab4 10.ab4 Bb4 11.0–0 0–0 12.Nh4 Ra1 13.Qa1?? (better is 13.Ba1 Qe7 14.Ndf3=+) 13...Bd2–+ 14.g4 Bg6 15.g5 Nh5 16.Bh5 (16.Kh1 Qe7–+ (16...Qg5?! 17.Nf3 Qf5 18.Nd2–+)) 16...Qg5 17.Bg4 Qh4 18.Bg7 Qg5 (better is 18...Re8 19.Rd1 f5 20.Bf3 Be3 21.fe3 Qh3 22.Rf1–+) 19.Bf8 Kf8 20.Qa8 Ke7 (better is 20...Kg7 21.Kh2 b5–+) 21.Rb1? (21.Kh1–+) 21...h5 22.Qa4 (22.Qa3 c5 23.Rb7 hg4–+) 22...hg4 (22...b5 23.Qa3 b4 24.Rb4 Bb4 25.Qb4 c5 26.Qf4 Qf4 27.ef4 hg4 28.hg4–+) 23.hg4 (23.Qg4 Qg4 24.hg4 b5–+) 23...Bh5 (23...b5 24.Qa8–+) 24.Kf1 (24.Qa3 Kf6 25.Qa8 Kg7 26.Qa1 e5–+) 24...Qg4 (better is 24...Bg4 25.Rb7 Bf3 26.Rd7 Kd7 27.Qa7 Kd6 28.Qb8 Ke7 29.Qc7 Kf8 30.Qb8 Kg7–+) 25.Qa3 (25.Qg4 Bg4 26.Rb7–+) 25...c5 26.Rb7 Qe2 27.Kg1 Be1 28.Qc5 Kf6 29.Qd4 Ne5 30.Qf4 (30.e4 Qg4 31.Kf1–+) 30...Kg6 31.Qg3 Qg4 (31...Ng4 32.Rf7 Kf7–+) 32.Qg4 Ng4 33.Kf1 Bf2 34.e4 de4 35.de4 Bd4 36.c4 Ne5 37.Rb4 Bc5 (37...Bf3 38.c5 Bc5 39.Ra4–+) 38.Ra4 Bf3 39.Ra5 Nd3 40.Rb5 Be4 41.Ke2 f5 42.Rb8 Kf6 43.Rd8 (43.Rh8–+) 43...f4 44.Rd3 Bd3 45.Kd3 Kf5 46.Ke2 e5 47.Kf3 e4 48.Kg2 Kg4 49.Kf1 f3 50.Ke1 Kg3 51.Kd2 e3 52.Kc3 f2 53.Kb3 f1Q 0–1. Aliethah – Hermeneutix, Live Game Caissa's Web, 2004.

4.d3 Nf6 5.a3 =+.

4.d4 Qb6 5.a3 e6 6.Nd2 Nf6 7.c4 Nbd7 8.c5 Qc7 9.Ngf3 Be7 10.Be2 Ne4 11.0–0 0–0 12.Ne5 (12.Ne4 Be4 13.Nd2 Bf5=) 12...Ne5 13.de5 Nd2 14.Qd2 a5 15.Bc3 (15.Bd4 f6 16.ef6 Bf6 17.Bf6 Rf6=) 15...Ra7 16.Ra2 Rfa8 17.Rfa1 ab4 18.ab4 Qb8 19.Ra7 Ra7 20.Ra7 Qa7 21.Bd4 Qa3 22.Qb2 ½–½. Frenzel,Lothar – Lohr, corr SOK–90–56, 1990.

4.Be2 f6 5.f4 Nd7 6.Nf3 Be4 7.0–0 Bf3 8.Bf3 Qc7 9.Bg4 g6 10.Be6 Bg7 11.Nc3 Nh6 12.b5 Nf7 (12...Qd6 13.Bd7 Qd7 14.a4=) 13.Ba3 (13.bc6 bc6 14.Rb1 Nd6+=) 13...Nd6 14.Rb1 Nb6 (better 14...Nf8 15.Bd6 Qd6=) 15.Qg4?? (better 15.bc6 bc6 16.Bd6 Qd6 17.f5+=) 15...f5–/+ 16.Qe2 (16.Qd1 Bc3 17.dc3 Nb5–+ (17...cb5?! 18.Qd4 Rf8 19.Bc5=+)) 16...Bc3 17.dc3 Nbc4 (17...Nb5!? 18.Bb2 Nc4–+) 18.Bc5–/+ b6 (18...Nb5!? 19.Bd4 Rf8 20.Bd5 Nca3 21.Rb5 Nb5–/+) 19.Bd4= Rf8 20.bc6? (better 20.Bg7 Nb5 21.Rb5 cb5 22.Rd1–/+) 20...Qc6–/+ 21.Rfd1? (better 21.g4–/+) 21...Ne4–+ 22.Bd5 Qd5 23.Bb6 (23.Qd3 Qe6 24.Qe2–+) 23...Qc6 (better 23...Nc3 24.Qe1 Nd1 (24...ab6?! 25.Rd5 Nd5 26.Qe2–+; 24...Nb6?! 25.Rd5 Nbd5 26.Rb3–/+) 25.Rd1 Qe4–+ (25...Nb6?! 26.Rd5 Nd5 27.Qa5–+)) 24.Bd4 Rd8 (24...Rc8 25.Qe1–+) 25.Rb4 (25.Ba7 Ra8 (25...Nc3? 26.Rd8 Kd8 27.Qd3 Ke8 28.Qc3+–) 26.Bd4 Ra2–+) 25...Nb6 (25...Rc8 26.Rb3–+) 26.Rd3 (26.c4 Rc8–+) 26...Nd5 27.Rb3 Qc4 (27...a6 28.Qd1–+) 28.Qd1 Kf7 29.Ra3 (29.Qe1 Rd7–+) 29...Rd7 30.Rb3 Rfd8 31.Qe1 Nc7 32.Qd1 Ne6 33.Qe1 N4c5 34.Bc5 Rd3 (better 34...Nc5 35.Rd7 Rd7–+ (worse 35...Nd7 36.Qd1–+)) 35.cd3–/+ Rd3?? (better 35...Qc5 36.d4 Qc7–/+) 36.Bd4+– Nd4 37.ed4 (worse 37.cd4 Rb3 38.ab3 Qb3=+) 37...Qc6 38.Qe2 (better 38.Ra3+–) 38...Qc4?? (38...Rc3 39.Rb2=+) 39.Qe1 (39.Rb7 Kg8 A) 40.Ra7?! Rc3 41.Qc4 Rc4+–; B) 40.Re7 Rc3 41.Qe5 Rc1 42.Kf2 Qa2 43.Kg3 Rc3 44.Kh4 Qf2 45.Kg5 h6 (45...Qg2?? 46.Kf6 Qc6 47.Re6+–) 46.Kh6 Qh4 47.Kg6 Qg4 48.Kf6 Rc6 49.Re6 Qh4 50.Kf5 Qh5 51.Ke4 Qe2 52.Kf5 Qh5 53.Ke4 Qe2 54.Kf5 Qh5=; C) 40.Rb4+–) 39...Qd5 (39...Qc6 40.Ra3+–) 40.Qe2 Qc4 41.Qe1 (41.Rb7 Kg8 A) 42.Ra7?! Rc3 43.Qc4 Rc4+–; B) 42.Re7 Rc3 43.Qe5 Rc1 44.Kf2 Qa2 45.Kg3 Rc3 46.Kh4 Qf2 47.Kg5 h6 (47...Qg2?? 48.Kf6 Qc6 49.Re6+–) 48.Kh6 Qh4 49.Kg6 Qg4 50.Kf6 Rc6 51.Re6 Qh4 52.Kf5 Qh5 53.Ke4 Qe2 54.Kf5 Qh5 55.Ke4 Qe2 56.Kf5 Qh5=; C) 42.Rb4+–) 41...Qd5 (better 41...Qc6=) 42.Qe2 (better 42.Ra3+–) 42…Qc4= ½–½. FeegLood (2730) – erindreki (2465), lichess.org, 2015.

4.Ne2 Nd7 5.Ng3 Bg6 6.h4 (6.a3 Ngf6=) 6...h6 7.h5 (7.a3 Ngf6=) 7...Bh7 8.a3 e5 (8...Ngf6 9.c4=) 9.d3 (9.d4 Bd6=) 9…Bd6 (10.c4 Ngf6=+; 9...Ngf6 10.Nc3=+). smoothmovermovesagain – WoodPusher83, ChessWorld.net, 2006.

4.Ne2 e6 5.a3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Ne2 e6 5.a3 c6).

4.Nf3 Nh6 5.d4 e5 6.a3 e4 7.Nfd2 Bd6 8.c4 Ng4 9.g3 Qg5 10.Be2 Nd7 11.0–0 0–0 12.Nb3 Ndf6 13.c5 Qh5 14.h4 Bc7 15.N1d2 b5 16.a4 a6 17.ab5 ab5 18.Ra8 Ra8 19.Nb1 Ra2 20.Qd2 Ra4 21.Bc3 h6 22.Qe1 Ra2–/+ 23.N1d2 Rc2 24.Nb1? Qg6 25.Na3? Ra2 26.Nb1 Nh5 27.Na5? Ba5?? 28.ba5–/+ Rc2 29.a6 Qf6 30.Bg4 Bg4–/+ 31.Na3? Re2 32.Qd1 Qf3 33.a7 Kh7 34.Qe2–+ Qe2 35.a8Q Ng3 36.fg3 Qe3 37.Rf2 Qc3 38.Qc6?? Qa3 39.Qd5 Qg3 40.Rg2 Qe1 41.Kh2 Qh4 42.Kg1 f5 43.c6 Qe1 44.Kh2 Qh4 45.Kg1 b4 46.c7= Qe1 47.Kh2 Qc1 48.Qc5 Qf4 49.Kg1 Qe3 50.Kh1 Qe1 51.Kh2 Qh4 52.Kg1 f4 53.c8Q Qe1 54.Kh2 Qh4 55.Kg1 Qe1 56.Kh2 Qh4 57.Kg1 ½–½. Bonetti,Shane – Sigma 4, 2000.

4.f4 h5 5.Nf3 Nf6 6.a3 e6 7.Ne5 a5 8.b5 c5 9.Nc3 b6 10.Ne2 Nfd7 (10...Ne4 11.d3 Nd6 12.Ng3+=) 11.Ng3+= Bh7 12.Qh5 Ne5 13.Be5 Nd7 14.Bb2 Nf6 15.Qh3 Be7 16.0–0–0 Qd7 17.Nh5 Nh5 18.Qh5 0–0–0? (better 18...c4!? 19.a4 Bf6+=) 19.Bg7 Bc2?? (better 19...c4 20.Bh8 Ba3 21.Bb2 Bb2 22.Kb1 Rh8 23.Bc4 Bc2 24.Kc2 Rh5–/+) 20.Bh8 Bd1 21.Kd1 (21.Qd1?! Rh8 22.Qa4 Qd6+=) 21...c4 22.a4 Qd6 (22...f6 23.Qh6 Rf8 24.Bg7+–) 23.Bc3 (23.Be5 Qb4 24.Qf7 Kd7+–) 23...Qa3 (23...f6 24.g4+–) 24.Qf7 Rd7 25.Qe6 Qa4 26.Ke2 Qb5 27.g3 Bb4 (27...Kb8 28.Bh3 Rb7 29.Bg2+–) 28.Bh3 Bc3 29.Qd7 Qd7 30.Bd7 Kd7 31.dc3 1–0. FeegLood (2740) – erindreki (2460), lichess.org, 2015.

4.g4 Bc8 5.a3= Nf6 6.g5 Ne4 (6...Nfd7 7.Nf3=) 7.Nf3 Bg4 8.Rg1 Bf3 (8...Qd7 9.Be2=) 9.Qf3 Qc7 (9...e6 10.Qh5=) 10.d3+= Nd6 (10...Qh2? 11.Rg2 Ng5 12.Rg5+– (12.Rh2?? Nf3 13.Ke2 Nh2–+)) 11.c4 dc4 (11...e6 12.e4+=) 12.dc4 Nd7 (12...c5 13.Nd2+=) 13.c5 Nc8 14.Nd2 b6 (14...Qh2!? 15.Rg3 Qh4+/–) 15.Bg2+– bc5 (15...Nb8!? 16.Nc4 f6 17.Qh5 g6 18.Qg4+–) 16.Qc6 Qc6 17.Bc6 Rb8 18.Ne4 (18.Nf3 e6 19.Ne5 Ncb6+–) 18...cb4 19.Nc5 Ncb6 20.Nd7 Nd7 21.ab4 (better is 21.Rd1 Rd8 22.Be5+– (22.ab4?! e5 23.Ke2 Ke7+–)) 21...e6? (21...Rc8 22.b5 e6+–) 22.Ra7 Bb4 23.Ke2 Rd8 (23...0–0 24.Rd7 Rfd8+–) 24.Bg7 Rg8 (24...Bc5 25.Bd7 Rd7 26.Rd7 Kd7 27.Rd1 Kc6 28.Bh8 Bb6+–) 25.Bf6 Be7 26.Rd1 Bf6 27.gf6 Rg6 (27...Rb8 28.Rad7 Rb2 29.R1d2 Rd2 30.Rd2 Kf8 31.Rd8) 28.Rdd7 Rf6 29.Rf7 (29...Rd7 30.Rfd7 Rf2 31.Kf2 Kf8 32.Rd8) 1–0. pierre (2075) – jcdelara, internet, 2007.

4.h4 h6 5.g4 Be4 6.Nf3 e6 7.a3 Be7 (7...Nd7!?=) 8.Bg7+= Rh7 9.Bb2 Bf3 (9...Bh4!? 10.c4 Bf6+=) 10.Qf3+– Bh4? (better 10...Bf6 11.Nc3 Rg7+–) 11.Bd3+– Bf6 (11...f5 12.gf5 Bf6+–) 12.Bh7 Bb2 13.Bg8 Ba1 (13...Qe7 14.Ra2 Bg7+–) 14.Qf7 1–0. Pereira – Marekt, internet, 2020.

4.a3 Nd7

5.c4 dc4 6.Bc4 Ngf6 7.Nf3 =.

5.c4 e5 6.cd5 cd5 7.Nf3 Bd6 8.Nc3 Ngf6 9.Be2 0–0 10.0–0 Rc8 11.Rc1 a6 12.d3 b5 13.Qb3 Be6 14.Qd1 Qb6 15.Ng5 d4 16.Ne6 fe6 17.ed4 ed4 18.Ne4 Ne4 19.de4 Rc1 20.Qc1 Ne5 21.Qd2 Rd8 22.Rd1?? Nf7?? 23.Bd4+/– Qc7 24.g3 e5 25.Be3 Be7 26.Qc1 Rd1 27.Qd1 Bg5? 28.Bg5+– Ng5 29.f3?? Qb6 30.Kg2 a5?? 31.Qd5 Nf7 32.Bb5 ab4 33.ab4 (33.ab4 Kf8 34.Bc4+–) 1–0. Fournier,Frederic (1795) – chitbiru (1745), Active (4/0), 2005.

5.c4 e6 6.c5 (6.Nf3 Ngf6=) 6...Ngf6 (6...Ne7 7.Nf3=) 7.Nf3= h6 (7...Be7 8.Be2=) 8.h3 (8.Be2 Be7=) 8...Be7 9.Be2 0–0 10.0–0 a5 11.Nc3 Qc7 12.d4 (12.Nd4 Bg6=) 12...Ra7 (12...ab4 13.ab4 Ra1 14.Qa1=) 13.b5 Raa8 (13...b6 14.bc6 Qc6 15.Bb5+=) 14.b6+= Qb8 15.Nb1 (15.Qd2 e5+=) 15...Re8 (15...e5 16.Ne5 Ne5 17.de5=+) 16.Nbd2+= Be4 (16...a4 17.Rc1+=) 17.a4 (17.Qa4 Bf3 18.Nf3 e5+=) 17...Bf3 18.Bf3 e5 19.Nb3 Ne4 (19...ed4 20.Qd4 Nf8 21.Bg4+=) 20.Be4+/– de4 21.Qc2 ed4 22.Bd4 Bf6 (22...Nf6 23.Rfd1+=) 23.Qc3 (23.Rad1 Re6+/–) 23...Bd4 24.ed4 Nf6 25.Rfe1 (25.Na5 Nd5 26.Qd2 Re7+/–) 25...Nd5+= 26.Qd2 Nb4 (26...Qf4!?+=) 27.Na5+/– Nd3 28.Re3 Qc8 (28...Nf4!?+/–) 29.Nc4+– Qe6 (29...Qd7 30.Nd6+–) 30.Nd6 Re7?? (better is 30...Qd5 31.Ne8 Re8+–) 31.Re4 (31...Nc5 32.Re6 Ne6 33.d5 cd5 34.Qd5+–; 31.Ne4?! Nf2 32.Qf2 f5+–) 1–0. Iosif,Daniela – Dalhoff,Gundula, DamenBL2, 1992.

5.d4 Ngf6 6.c3 e6 7.Nf3 b6 8.Bd3 Bg6 9.Qc2 c5 10.Bg6 hg6 11.bc5 bc5 12.dc5 Nc5 13.h3 Rc8 14.0–0 Bd6 15.Qd3?? (15.Nbd2 Ncd7=) 15...0–0 (better is 15...Nd3 16.Ra2 Ne4–+) 16.Qd2? (16.Qc2 Nce4+=) 16...Nfe4?? (better is 16...Nb3 17.Qd3 Na1–+) 17.Qe2 Nb3 18.Ra2 Nbc5 (18...Qb6 19.a4–/+) 19.Nbd2 (19.Ra1 Rb8 20.Ra2 Qb6+=) 19...Na4 20.Bc1?? Nec3 21.Ra1 Ne2 22.Kh1 Nec3 23.Bb2 Ne4 24.Be5 Nd2 25.Rfd1 Nf3 26.gf3 Be5 27.Rab1 Qd6 28.f4 Bf4! 29.ef4 Qf4 30.Kg2 Qe4 31.Kg1 Rc2 32.Rf1 Qf3 33.Kh2 Qf4 34.Kg2 Qe4 35.Kg1 Nc3 36.Rbc1 Rc1 37.Rc1 Ne2 38.Kf1 Nc1 39.Kg1 Nd3 (39...Nd3 40.a4 Nf4 41.f3 Qf3 42.a5 Qg2; 39...Ne2 40.Kh2 Qf3 41.h4 Qf2 42.Kh3 Qg3) 0–1. Fournier,Frederic – Aldocap, Partie evaluee, 0m + 1s, 2008.

5.Nf3 e6 6.d4 Bd6 7.Bd3 Qc7 (7...Bd3 8.Qd3 Ngf6 9.0–0+=) 8.Bf5= ef5 9.h3 (9.Qd3 Ne7=) 9...Ngf6 10.Nbd2 Ne4 (10...b5 11.Nb3+=) 11.0–0 0–0 12.c4 b6 13.cd5 cd5 14.Rc1 Qb7 15.Qe2 Ndf6 16.Ne5 Rac8 17.f3 (17.Nb3 Rfe8=) 17...Nd2 (better is 17...Ng3 18.Qd3 Nf1 19.Rc8 Qc8 20.Nf1 a5–/+) 18.Qd2= Rc1 19.Rc1 Rc8 20.Rc8 Qc8 21.Qc3 Qc3 22.Bc3 a5 23.Kf2 ab4 24.Bb4 Bb4 25.ab4 Kf8 26.b5 Ke7 27.Ke2 h6 28.Kd3 Nd7 29.Nc6 Kd6 30.Ne5?? Ne5–+ 31.de5 Ke5 32.f4? Kd6 33.Kd4 g5 34.g3?? f6 35.fg5 fg5 36.h4 gh4 37.gh4 h5 (37...h5 38.Kd3 Kc5–+) 0–1. Fournier,Frederic (1700) – gmfera (1650), Active, 2007.

5.Nf3 Ngf6 =.

5.f4 a5 6.Nc3 e5 (6...ab4 7.ab4 Ra1 8.Qa1 e6 9.Nf3 Ngf6 10.Qa7 Qc8 11.Qa4 Bd6 12.Nd4) 7.fe5 (7.Nf3 ef4 8.ef4 ab4 9.ab4 Ra1 10.Qa1 Nh6 11.b5 Bd6 12.Nd5) 7...Ne5 8.Nf3 Nf3 9.Qf3 Bc2 10.Rc1 Bg6 11.b5 Nf6 12.Na4.

5.f4 e6 6.Be2 Ngf6 7.d3 (7.Nf3 a5=) 7...h5 (7...a5 8.Qd2=+) 8.Nf3= Bd6 9.Nbd2 Qb6 (9...a5=) 10.Nf1 (10.e4!? Bh7 11.e5+=) 10...c5 (10...Bb4 11.ab4 Qb4 12.N3d2 Qb2 13.Rb1–/+) 11.c3 (11.bc5 Bc5 12.Rb1 Rb8=) 11...c4 (better 11...h4!?=+) 12.dc4+= dc4 13.Bc4 Rc8 14.Be2 Ne4 15.c4 (better 15.Qd4!?+–) 15...Bb4= 16.ab4 Qb4 17.N3d2 (17.N1d2 Qb2 18.Ra7 Ndc5=) 17...Qb2=+ 18.Ne4 (18.Ra7 Ndc5 19.Qa1 Qa1 20.Ra1 h4=+) 18...Be4–/+ 19.Nd2 Qc3 (better 19...Nc5!? 20.Ne4 Ne4 21.Qa4 Rc6 22.Qa7 0–0–+) 20.Kf2=+ Nf6 21.Ra7 0–0 22.Qc1 (22.Bh5? A) worse 22...Nh5 23.Ne4 Qc4 24.Nd6 (24.Qh5?! Qe4 25.Re1 Rc2 26.Re2 Rfc8=+) 24...Qc2 25.Qc2 Rc2 26.Kf3+–; B) 22...Rfd8 23.Ra2 Nh5–+; 22.Ne4 Ne4 23.Kf3 Nd2 24.Kf2 g5 25.Bh5 Ne4 26.Kf3 f5=+) 22...Qb4 23.Rd1 (worse 23.Ne4 Ne4 24.Kf3 Nd2 25.Kf2 Nc4–/+) 23...Rfd8 24.Qa3? (24.Nf1 Ng4 25.Bg4 hg4 26.Rd8 Rd8=) 24...Qb6 (24...Qa3 25.Ra3 Bc2 26.Ke1 Bd1 27.Bd1–+) 25.h3? (25.Nb3 Rd1 26.Bd1 Rc4–/+) 25...Bf5?? (better 25...Bc2 26.Ke1 Bd1 27.Bd1 h4–+) 26.Bf3=+ Rd3 (26...Bc2 27.Rb7 Qd6 28.Qd6 Rd6 29.c5+=) 27.c5= Rc5 28.Ra8? (better 28.Rb7!? Qb7 29.Qd3 (29.Bb7?? Ra3 30.e4 Bg6–+; 29.Qc5 Qb2 30.Ke2 Rc3=+) 29...Qf3 30.Nf3 (30.Kf3?? Bd3 31.Kg3 Nd5–+) 30...Bd3 31.Rd3 Ne4 32.Ke2 Rc2 33.Nd2=) 28...Kh7–+ 29.Nc4 (better 29.Qa4–+) 29...Rc4?? (better 29...Ra3 30.Nb6 Rc2 31.Kg1 Re3–+) 30.Rd3+= Ne4 31.Be4 (31.Kg1 Qb4 32.Qb4 Rb4+–) 31...Be4 (31...Rc2 32.Ke1 Be4 33.Ra5=+) 32.Rd2+= Qc6 33.Qf8?? (better 33.Kg3+=) 33...Rc3?? (33...Bg2 34.Qh8 Kg6 35.f5 A) 35...Kf5?! 36.Qh5 (36.Qg7?? Qf3 37.Kg1 Rc1 38.Rd1 Rd1 39.Kh2 Qh3) 36...Kf6 37.Kg3=; B) 35...ef5–+) 34.Qh8 Kg6 35.Rg8 (35.Rg8 Qd7 36.Qg7 Kf5 37.Qg5) 1–0. FeegLood (2725) – erindreki (2475), lichess.org, time forfeit, 2015.

5.f4 e6 6.Nf3 Ngf6 7.c4 Bd6 8.Be2 (8.c5 Be7+=) 8...h6 (8...dc4 9.Bc4 b5 10.Be2+=) 9.0–0 (9.c5 Be7+=) 9...0–0 (9...dc4 10.Bc4 0–0 11.Nd4=) 10.d4 (10.c5 Bc7+=) 10...Ne4 (10...dc4 11.Bc4 Nb6 12.Bd3+=) 11.b5 (11.Nc3 Ndf6=) 11...dc4 12.bc6 Nb6 (12...Qb6 13.Bc4 Qb2 14.Ra2=) 13.Nfd2 (13.cb7 Rb8=) 13...bc6 14.Nc4 Nd5 (14...Nc4 15.Bc4 Rb8 16.Qe2+=) 15.Qc1 Rc8 16.Nbd2 Nd2 17.Qd2 Be4 18.Bd3 Bd3 19.Qd3 (worse is 19.Nd6 Bf1 (19...Qd6?! 20.Qd3 Rb8 21.Rab1=) 20.Nc8 Ba6–/+ (worse is 20...Qc8 21.Rf1 Qb7 22.e4+=)) 19...f5 20.Rfc1 Rf7 21.Rc2 Rb7 22.Qd2 Rb3 23.Re1 Bc7 24.Bc3 Qh4 25.Ba5 Bb8 26.g3 Qg4 27.Rb2 Rb2 28.Qb2 Bc7? 29.Bc7 Rc7+/– 30.Ne5 Qh5 31.Qb3 c5 32.dc5+/– Rc5?? 33.e4 fe4+/– 34.Re4 Qh3 35.Rc4+/– Rc4 36.Qc4 Qf5 37.Kf2 Qh3 38.Nf3 Qf5 39.Qc5 Qf7 40.Qc6 Nf6 41.Ne5+/– Qe7 42.a4 h5 43.Kg2 Ng4 44.Qc8 Kh7 45.Qc2 Kg8 46.Qg6 Ne5= 47.fe5 h4 48.g4 Qb7= 49.Kh3 Qf3 ½–½. Fusco,Leonardo (2270) – Salaberry,Gustavo (2235), 55 Abierto de Verano, 2005.

5.f4 Ngf6 6.Be2 (6.Nc3 e6 7.Nf3 Bd6 8.Nd4 0–0 9.Be2 a5 10.b5 Nc5 11.0–0 Qc7 12.Qe1; 6.Nf3 e6 7.Be2 a5 8.b5 Bd6 9.0–0 0–0 10.Nc3 Nc5 11.Nd4 Qc7 12.Qe1; 6.Ne2 a5 7.b5 e6 8.Nbc3 Bc5 9.Ng3 0–0 10.d4 Bd6 11.Be2 Bg6 12.0–0) 6...Qc7 (6...a5 7.b5 Qb6 8.Nf3 e6 9.Nc3 Bd6 10.Nd4 0–0 11.0–0 Nc5 12.Rb1) 7.Nf3 h6 (7...a5 8.Nc3 e6 9.Nd4 Bd6 10.g4 Bg6 11.f5 Bh2 12.fg6) 8.0–0 e6 9.c4 (9.Nd4 Bd6 10.Nf5 ef5 11.Bd3 a5 12.Bf5) 9...dc4 (9...a5 10.cd5 cd5 11.Nc3 ab4 12.Nb5) 10.Bc4 (10.Nd4 Bd3 11.Bd3 cd3 12.Nc3) 10...Be7 (10...b5 11.Be2 a5 12.ba5) 11.Nc3 (11.Nd4 Nb6 12.Be2) 11...Nb6 (11...0–0 12.Nd4) 12.Be2 0–0 13.d4 Nbd5 14.Nd5 cd5 15.Rc1 Qd8 16.Nd2 Rc8 17.Qa4 Qb6 18.h3 Bh7 19.g4 Ne4 20.Ne4 Be4 21.Kh2 Rfd8 22.Kg3 a6 23.h4 g6 24.Rfd1 Kg7 25.g5 hg5 26.hg5 Qd6 27.Kf2 b5 28.Qb3 Rh8 29.Rc8 Rc8 30.Rc1 Rh8 31.Bf3? Bf3–/+ 32.Kf3 Bg5! 33.Rg1 Bf6 34.Qc3 Qd7 35.Rc1?? e5! 36.Qe1 Rh2 37.de5 Qh3 38.Qg3 Qh5 39.Qg4 Rh3 40.Kf2 Qg4 41.ef6 Kh7 (41...Kh7 42.Rh1 Qf3 43.Ke1 Rh1 44.Kd2 Rh2 45.Kd3 Qe4 46.Kc3 Qe3; 41...Kh6 42.Rh1 Qf3 43.Ke1 Rh1 44.Kd2 Rh2 45.Kd3 Qe4 46.Kc3 Qe3) 0–1. Bulatovic,M (2030) – Muhic,S (1995), 25th Festival Open A, Bled SLO, 2008.

5.f4 Ngf6 6.Nf3 g6 (6...e6 7.Be2=) 7.Nc3 Bg7 8.Ne2 (8.Be2 Nb6=) 8...0–0 9.Ned4 Ne4 10.Qc1 Re8 (10...Bg4!?=+) 11.Nf5= gf5 12.Bg7 Kg7 13.Qb2 f6 14.0–0–0 (14.Nd4!? e6 15.Rg1+=) 14...a5 (14...Nf2 15.Rg1 Nd1 16.Kd1–/+) 15.b5 (15.Rg1=+) 15...Ndc5 (better 15...Nf2!? 16.Rg1 Nd1 17.Kd1 e6–/+) 16.Rg1= Kh8 17.Qd4 (17.Nd4 Na4 18.Qb3 Nac5=) 17...Qd6 18.d3 (18.Re1 e5 19.Qa1 ef4 20.ef4 Qf4=) 18...e5 (18...Nf2 19.Rd2 Ng4 20.Re2=+) 19.Qa1 Nf2 20.fe5 fe5 21.Re1 Ne6 Black plans d4 (better 21...Nd7!?=+) 22.Ne5+– Kg8 23.g4 f4 24.g5 fe3 25.g6 (25.bc6 Nd4 26.Ng4 (26.Re3? Qc5 27.Qa2 Nc6–+; 26.cb7 Qe5 27.Qb2 Rab8–+) 26...Ng4 27.cb7=) 25...d4–/+ 26.gh7 (26.Re3 de3 27.Nf7 Qa3 28.Qa3 hg6+–) 26...Kh7 27.Nf3 (27.Nc4!? Qf4 28.bc6 e2 29.Nd2 ef1N 30.Rgf1 Nc5 (30...bc6?! 31.Re2=) 31.cb7 Re1 (31...Nb7?! 32.Qa2 Re1 33.Re1–/+) 32.Re1 Rb8 33.Re7 Kh6–+) 27...cb5–+ 28.Qb2 b4 29.a4 (29.Be2 Qc5–+ (29...ba3?! 30.Qb5 Qc5 31.Ng5 Kh8 32.Nf7 Kh7 33.Ng5 Kh6 34.Nf7 Kh7 35.Ng5=)) 29...Rac8 30.Kb1 Rc3 31.Re2? (31.Ng5 Ng5 32.Rg5 Re5 33.Re5 Qe5–+) 31...Rec8 (31...b3 32.Ng5 Ng5 33.Rg5–+) 32.Rg3 Nf4 (better 32...Qc5 33.Rh3 Nh3 34.Bh3 Qd5–+) 33.Ng5+– Kg8 (33...Kg7 34.Ne4 Qg6 35.Nc3 Rc3 36.Re1+–) 34.Ne4 Qg6 35.Rg6 Ng6 36.Nf2 ef2 37.Rf2 Kg7 38.Rg2 (better 38.Qa2 b3 39.cb3 Rc1 40.Kb2+–) 38...R3c5 (38...Rf8 39.Be2 Rf6 40.Qc1+–) 39.Be2 (39.Qd4 Kh7 40.Qd7 Kh6 41.Qh3 Rh5 42.Qc8 Rd5 43.Qh3 Rh5 44.Qg3 Rg5 45.Qg5 Kg7 46.Qg6 Kf8 47.Re2 b5 48.Re8) 39...Kh6 (39...Rd8 40.Rg4 Rc3 41.Qc1+–) 40.Qd4 Rg5 (40...Rc2 41.Rg1 Re2 42.Qf6 Re1 43.Re1+–) 41.Qe3 (better 41.Rg5 Kg5 42.Qg4 Kh6 43.Qh3 Kg5 44.Qc8 Kh6+–) 41...Rcc5 42.h4! Nh4 43.Rh2 Kg7 44.Rh4 Rce5 45.Kb2 (45.Re4 Ref5 46.Re7 Rf7 47.Qg5 Kf8 48.Re6 Rf1 49.Bf1 b3 50.Qf6 Kg8 51.Re8 Kh7 52.Rh8) 45...Re3–+ 46.Bd1 (46.Rg4 Rg4 47.Bg4 Kf6–+) 46...Reg3 (46...b5 47.ab5 Rb5 48.Bg4–+) 47.Rc4 (47.Rh5 Rh5 48.Bh5 Kf6–+) 47...Rg2 (better 47...b5!? 48.ab5 Rb5–+) 48.Rc7 Kf6 49.Bf3 Kf5?? (better 49...Rd2 50.Bb7 Rd1–/+) 50.Be4 (50.Rb7 Rf2 51.Be4 Ke6 52.Rb6 Kd7 53.Rb7 Kc8–/+) 50...Kf4 51.Bg2 Rg2 52.Rb7 Ke3? (better 52...Rg8+–) 53.Rb5 Kd2 (53...Rg6 54.Ra5 Rc6 55.Rg5+–) 54.Kb3 (54.Ra5 Rg6+–) 54...Kc1 (54...Rg1 55.Ra5 Rb1 56.Kc4 Kc2 57.Rg5+–) 55.Ra5 Rc2 56.Kb4 Rb2 57.Kc5 Rc2 58.Kb6 Rd2 59.Rb5 Kd1 (59...Rd3 60.a5 Rd6 61.Kb7 Rd7 62.Kb8 Rd8 63.Kc7+–) 60.a5 Rc2 (60...Rd3 61.a6 Rd6 62.Kb7 Rd7 63.Kb8 Rd8 64.Kc7 Ra8+–) 61.a6 Rd2 (61...Rc8+–) 62.a7 Rd3 63.Kb7 (63.a8Q Kd2+–) 63...Rd6 (63...Rd7 64.Ka6 Rd8+–) 64.a8Q Rd7 65.Ka6 Rd2 66.Rb6 (66.Qf3 Kc1 67.Rc5 Rc2 68.Qe3 Kb2 69.Rb5 Ka1 70.Qe1 Ka2 71.Qa5) 66...Ra2+– 67.Kb7 Rd2 (67...Ra8 68.Ka8 Kd2+–) 68.Qa6 Kc1 69.Ka8 (69.Qa3 Kd1 70.Qf3 Kc1 71.Qf4 Kd1 72.Qf1 Kc2 73.Qc4 Kd1 74.Rb1) 69...Rc2 70.Rb8 (70.Rb8 Rc4 71.Qc4 Kd2 72.Rd8 Ke3 73.Rd3 Kf2 74.Qc2 Ke1 75.Rd1; 70.Rb3 Rc7 71.Qf1 Kd2 72.Rd3 Kc2 73.Qd1 Kb2 74.Rb3 Ka2 75.Qb1) 1–0. FeegLood (2545) – smeets (2410), lichess.org, time forfeit, 2015.

4.a3 e6

5.c4 Nd7 6.Nc3 dc4 7.Bc4 Ne5 8.Be2 Bd3 9.Nf3 Be2 10.Qe2 Nd3 (10...Nd3 11.Kf1 a5+=). tightfist (2505) – iozeph (2585), net–chess.com, 2013.

5.c4 Nd7 6.cd5 cd5 7.Nf3 Ngf6 8.Be2 g6 (8...Rc8 9.Nc3=) 9.0–0 Bg7 10.d4 0–0 11.Bd3 Bd3 12.Qd3 Ne4 13.Nbd2 Ndf6 14.Ne4?? (14.Rac1 a5=) 14...Ne4?? (better is 14...de4 15.Qe2 ef3 16.Qf3 Qd5–+) 15.Nd2 Nd2 16.Qd2 Rc8 17.Rac1 Qb6 18.Rc8 Rc8 19.Rc1 Rc6 20.Rc6 bc6 21.Qc3 Qb7 22.Qc5 a6 23.a4 Qc7 24.a5 f6 25.Qb6 Qc8 26.f3 e5 27.de5 fe5 28.Kf2 Kf7 29.Qa7 Kg8 30.Qe7+/– d4 31.ed4 ed4 32.Bd4?? Bd4–+ 33.Kf1 c5 34.bc5 Qc5 35.Qe8 Kg7 36.Qd7 Kh6 37.Qh3 Kg7 38.Qd7 Kf6 39.Qd8 Qe7 40.Qd4+– Kf7 41.Qd5 Kg7 42.Qd4 Kh6 43.Qf4 Kg7 44.Qe4 Qc5 45.Ke2 Qa5 46.Qe7 Kh6 47.Qe3 g5 48.Qe6 Kg7 49.Qe7 Kg6 50.Qe6 Kh5?? 51.g4 Kh4 52.Qh6 1–0. Fournier,Frederic (1795) – marcelov (1650), Active, 2007.

4.a3 Bg6

5.Be2 Nf6 6.h4 e6?? (better 6...Qc7=) 7.h5+– Bf5 8.g4 Bc2 (8...Bg4 9.Bg4 Nbd7 10.Be2+–) 9.Qc2 h6 10.Nh3 Nbd7 11.Rg1 c5 12.g5 (12.bc5 Bc5 13.Qb3 Rc8+–) 12...hg5 13.Ng5 (13.Rg5 cb4 14.ab4 Ne4+–) 13...cb4 14.Nf7 (14.ab4 Bb4 15.Bf6 Qf6 16.Ra2+–) 14...Kf7+= 15.ab4 Rc8 (15...Rh6 16.b5+=) 16.Nc3 (16.Qg6 Ke7 17.Ra7 Rh6+–) 16...Rh6 17.Ra7 Qb6 18.Qa4 Nb8 (18...Bb4 19.Nb5 Bf8+=) 19.Rg6 Qb4?? (19...Rg6 20.hg6 Combination) 20.Qb4+– Bb4 21.Rb7 Kf8 (21...Be7 22.Nb5 Kf8+–) 22.Rb4 Rg6 23.hg6 Nc6 24.Rb7 Ne7 (24...Nd8 25.Ra7 Nc6 26.Rf7 Kg8+–) 25.Ba3 Re8 26.Nb5 Nfg8 (26...e5 27.Nc7 Rc8 28.Ne6 Kg8 29.Re7+–) 27.Nd4 (27.Nc7 Nf6 28.Ne8 Ke8 29.Be7 Nd7 30.Bg5 Ne5 31.Bb5 Nc6 32.Bc6 Kf8 33.Rb8) 27...Nf6 28.Ne6 (28.Bb5 Ra8 29.Be7 Kg8 30.Bf6 gf6 31.Bd7 Kg7 32.Be6 Kg6 33.Bf5 Kg5 34.Rg7 Kh5 35.Rh7 Kg5 36.f4) 28...Kg8 29.Be7 d4 30.Bf6 gf6 31.Rg7 (31.Bc4 de3 32.Nd4 Re6 33.Be6 Kf8 34.g7 Ke8 35.g8Q) 31...Kh8 32.Rh7 Kg8 33.Bg4 (33.Bc4 Rc8 34.Nc5 Kf8 35.g7 Ke7 36.g8Q Kd6 37.Qd5) 33...f5 34.Bf5 de3 35.de3 Ra8 36.Rg7 (36.Nc5 Ra1 37.Ke2 Rh1 38.Be6 Kf8 39.Rf7 Kg8 40.Rd7 Kh8 41.g7 Kh7 42.g8Q Kh6 43.Rh7) 36...Kh8 37.Rh7 Kg8 38.Kf1 (38.Nc5 Ra1 39.Ke2 Ra2 40.Kf3 Rd2 41.Be6 Kf8 42.Rc7 Rf2 43.Kf2 Ke8 44.Bf7 Kf8 45.Ne6) 38...Ra6 39.Kg2 (39.Kg2 Ra1 40.Rg7 Kh8 41.Rf7 Ra8 42.g7 Kg8 43.Rf8 Rf8 44.gf8Q; 39.Rg7 Kh8 40.Rf7 Ra1 41.Kg2 Ra8 42.g7 Kg8 43.Rf8 Rf8 44.gf8Q) 1–0. FeegLood (2760) – themurdercastle (2605), lichess.org, time forfeit, 2016.

5.h4 Nf6 6.h5 Bf5 7.Be2 h6 8.g4 Bh7 9.Nh3 e6 10.g5 Nh5?? (better 10...hg5 11.Ng5 Bf5=+) 11.Bh5+– Bg6 (11...Bf5 12.f4+–) 12.Bg6 fg6 13.Nf4 (better 13.Qg4 Kd7 14.Nf4+–) 13...h5 (13...Qg5 14.Ne6 Qg2+–) 14.Ng6 Nd7 (14...Rg8 15.Qh5 Kd7+–) 15.Nh8 g6 (15...Qg5 16.Qh5 Qh5 17.Rh5+–) 16.Ng6 (better 16.f4 Qc7+–) 16...Ne5 (16...Qg5 17.Qh5 Qh5 18.Rh5 Kf7 19.Nf8 Rf8 20.Rh7 Ke8+–) 17.Ne5 Be7 18.Qh5 Kf8 19.Qh8 1–0. FeegLood (2760) – Dirty_Thirty_Seconds (1910), lichess.org, 2015.

4.a4 Nd7

5.c4 dc4 6.Bc4 Ngf6 (6...Nb6 7.Be2+=) 7.Nc3 (7.Qb3 e6+=) 7...Ne5–/+ 8.Qe2? (better is 8.Be2!?–/+) 8...Bd3–+ (worse is 8...Nc4 9.Qc4 e5 10.Nf3–/+) 9.Bf7? (better is 9.Bd3 Nd3 10.Kf1–+) 9...Kf7 10.Qd1 (10.Nf3 Nc4 11.Qd1 Qd6–+) 10…Bc4 (10...Bc4 11.Nce2 Nd3 12.Kf1 Nb2–+) 0–1. Baxa,Ottokar – Dahmen,Juergen, Passau op 5th, 1997.

5.Nf3 Qb6 =.

5.Nf3 f6 6.Nd4 Bg6 7.Be2 e5 8.Ne6 Qe7? (better is 8...Qb8+=) 9.Nc5?? (better is 9.Nc7 Kf7 10.Na8+–) 9...b6 (9...Nc5 10.bc5 Qc5 11.d3–/+) 10.Nd3 Qd8 11.b5 c5 12.0–0 Bd6 13.Bh5 Ne7 14.Bg4 0–0 15.Be6 Kh8 16.c4?? (16.Nc3 c4 17.Nc1 Nc5 18.Bd5 Nd5 19.Nd5 a6=) 16...d4 (16...Bd3 17.cd5 c4 18.Re1–+) 17.ed4?? (17.Ne1 Re8=) 17...ed4 (better is 17...Bd3 18.de5 Be5 (18...Bf1?! 19.ed6 Bd3 20.de7 Qe7 21.Bd5–/+) 19.Be5 Bf1–+) 18.Ne1 Bf7 19.Bf7 Rf7 20.Nf3 Qc7 21.h3 Ne5 22.d3 Nf3 23.Qf3 Ng6?? (better is 23...Rd8=) 24.Qa8+– Rf8 25.Qf3 Nh4 26.Qg4 g5 27.Nd2 Qf7 (27...Bf4 28.Nb3+–) 28.Ne4 (28.g3 Ng6+–) 28...h5 (28...Bf4 29.Qd1+–) 29.Nd6 hg4 30.Nf7 Rf7 31.hg4 (31...Ng6 32.Rfd1+–) 1–0. MammaMia – bigpopae115, Live Game Caissa's Web, 2004.

5.Nf3 Ngf6 6.b5 e6 7.d4 Bd6 8.Be2 0–0 9.0–0 h6 10.Nbd2 Nh7 11.c4= Ng5 (11...Nhf6 12.Rc1=) 12.Qb3 Rb8 13.Ba3 Nf6 (13...Qe7 14.Bd6 Qd6 15.Rfc1=) 14.Ne5 Be5? (better 14...Nge4 15.Bd6 Qd6 16.Ne4 Ne4+=) 15.de5+– Nfe4 (15...Nd7 16.cd5 ed5 17.f4+–) 16.Ne4 (16.Bf8 Nd2 17.Qb4 Nh3 18.gh3 A) 18...Nf1?? 19.Be7 Qc7 20.Qd6 (20.Kf1?! Qe5 21.Rd1 Qh2+–; 20.Bf1?! Qe5 21.Rc1 Re8+–) 20...Qd6 21.Bd6+–; B) 18...Qg5 19.Kh1 Nf1 20.Rf1 Rf8 21.cd5 cd5=+) 16...Be4 (better 16...Ne4 17.Bf8 Qf8+–) 17.Bf8 Qf8 18.h4 Nh7 19.f3 Bg6 20.Rac1 Qe7 (20...Qd8+–) 21.bc6 Nf8 (21...d4+–) 22.cd5 ed5 (22...Qc7 23.d6 Qc8 24.c7+–) 23.c7 Rc8 24.Qb7 Bf5 25.Ba6 Re8 26.Qd5 Be6 (26...Qh4 27.f4+–) 27.Qd4 Bc8 (27...h5 28.Rfd1 Kh7 29.c8N Bc8 30.Rc8 Rc8 31.Bc8+–) 28.Bb5 Nd7 (28...Qe5 29.Qe5 Re5+–) 29.Rfd1 (29.Rfd1 Nf8 30.Qc5+–) 1–0. Pierre – Birger, internet, 2020.

5.Nf3 Ngf6 6.c4 e6 7.b5 h6 8.Nd4 c5 (better 8...Bd6!? 9.Nf5 ef5 10.bc6 bc6 11.cd5 cd5=) 9.Nf5+– ef5 10.cd5 Nd5 11.Qb3 N7f6 12.Bc4 Qd7 13.0–0 Nb6 14.Bf6 gf6 15.Nc3 Nc4 16.Qc4 Be7 (16...Qe6 17.Qe2+–) 17.d4 (17.Rfd1!?+–) 17...cd4+= 18.ed4 0–0 19.Qd3 Kh7 (19...Rfe8 20.d5+=) 20.Ne2 Rg8 (20...Rad8!?+=) 21.Ng3+– Rg5 (21...Kg6!?+–) 22.h4+– Rg4 23.Nf5 Kh8 24.g3 Rag8 (24...h5 25.Qf3+–) 25.Nh6 (25.Nh6 Rd4 26.Qf3+– (26.Nf7 Kg7 27.Qb3 Bc5–/+)) 1–0. GuestNXXZ – GuestCQCB, freechess.org, 2019.

4.a4 e6

5.b5 a6 6.c4 ab5 7.ab5 Ra1 8.Ba1 Qa5 9.Nc3 Bb4 10.Nf3 Nf6 11.Be2 Ne4 12.Ne4 de4 13.Nd4 0–0 14.Nf5 (14.0–0 A) 14...Bd2? 15.Nb3 (15.Nf5?! ef5 16.Qc2 Be1=) 15...Qb4 16.Be5+– (16.Nd2?! Rd8=; 16.Qd2?! Qb3 17.Bb2 cb5=); B) 14...Rd8=) 14...Bd2=+ 15.Qd2 Qa1 16.Qd1 Qd1 17.Kd1 ef5 18.Kc2 cb5 19.cb5 Rc8 20.Kb3 Nd7 21.Ra1 (21.Rd1 Ne5=+) 21...g6 (21...Kf8 22.Rd1 Ke7 23.h4–/+) 22.Ra7=+ Rc7 23.Bc4 Kg7 24.Kb4 (24.Bd5 Rc5 25.Bc4 Ne5–/+) 24...Kf6 (24...Ne5 25.Bd5 Nd3 26.Ka5–/+) 25.Bd5=+ Rc1 (better 25...Ne5!?=+) 26.Rb7+= Rb1 27.Kc3 Nc5 28.Rf7 Kg5? (better 28...Ke5!? 29.Ba2 Na4 30.Kc4 Nb6 31.Kc5 Na4 32.Kc6 Rc1 33.Kd7 Nb6 34.Ke7 Rc2=) 29.Bc6 Nd3 (29...h6!? 30.Kd4 Na4 31.f4 ef3 32.gf3 Rd1 33.Kc4 Rc1 34.Kb4+–) 30.f4 Kh6 (30...ef3 31.gf3 (31.Kd3?? f2–+) 31...Nb4 32.Kc4+– (32.Rh7?! Nc6 33.h4 Kf6 34.bc6 Rc1 35.Kd3 Rc6+–)) 31.h3 (31.g4 Nb4 32.h3 fg4 33.hg4 Nc6 34.g5 Kh5 35.bc6 Rc1 36.Kd4 Rc6 37.Rh7 Kg4+–) 31...Re1? (31...Nf2 32.Rd7+–) 32.Kd4 (better 32.g4 fg4 33.hg4 Re3 34.Kd4+–) 32...Rd1 33.Kc4 Rc1 34.Kd5 Rd1 35.Ke6 Re1 36.b6 (36.g4 fg4 37.hg4 Re3+–) 36...Re3 37.b7 Nc5 38.Kd6 Nb7 39.Rb7 (worse 39.Bb7 Rg3 40.Bd5 Rg2+–) 39...Rg3 (39...Rd3 40.Bd5 e3 41.g4 fg4 42.hg4+–) 40.Rb2 (better 40.Bd5 e3 41.Re7+–) 40...Kh5 41.Ke5 h6? (better 41...Kh4+–) 42.Be8 Kh4 43.Rb6 (43.Kf6 Kh5 44.Rb5 Rg2 45.Rf5 Kh4 46.Bg6 Kg3+–) 43...Rg2 44.Rg6?? (better 44.Bg6 e3 45.Bf5+–) 44...Kh3 (better 44...Rg6 45.Bb5 Rg2 46.Kf5 e3–+) 45.Rg2 (45.Rh6!? Kg3 46.Rg6 Kf2 47.Rg2 Kg2+–) 45...Kg2 46.Kf5 e3 47.Bb5 h5 (47...Kf3 48.Ke5 Kf2 49.f5+–) 48.Kg5 Kg3 49.f5 h4 (49...Kf3+–) 50.Bf1 (better 50.f6+–) 50...h3= 51.f6 h2 52.f7 h1Q 53.f8Q Qh4 54.Kg6 Qg4 55.Kh7 Qh5 56.Kg8 Qg6 57.Kh8 Qh5 58.Kg7 Qg5 59.Kh7 Qh5 60.Kg8 Qg6 61.Kh8 Qh5 62.Kg7 Qg5 63.Kh7 Qh5 ½–½. RichardSommer (2135) – tviskaron (2070), lichess.org, 2020.

5.b5 Nf6 6.Nf3 Nbd7 7.Nd4 Bg6=+ 8.c4 (8.Nc3 e5 9.bc6 bc6–/+) 8...c5 (8...e5 9.Nf3 Bd6 10.bc6 bc6 11.cd5 cd5 12.Nc3=+) 9.Nf3=+ h6 10.Be2 Nb6 (10...Bd6 11.Nc3=+) 11.cd5= Nbd5 (11...ed5 12.Ne5 Bf5 13.a5=) 12.Ne5+= Bh7 13.Na3 Nb4 14.0–0 Bd6 15.Bf3 Rb8 16.Nac4 Bc7 (16...Bc2 17.Qe2 Be5 18.Be5 Bd3 19.Nd6 Ke7=+) 17.d4+– cd4 18.Bd4 Nc2 (18...Qe7!? 19.a5 0–0+–) 19.Ba7+– Na1 20.Qa1 0–0 21.Bb8 Qb8 22.a5 Rd8 (better 22...Ne4+–) 23.a6 ba6 24.ba6 Be5 (24...Be4 25.a7 Qb7 26.Be4 Qe4+–) 25.Ne5 (25.Ne5 Qd6 26.a7+–) 1–0. GuestJVKF – GuestBRCD, freechess.org, 2020.

5.c4 Nd7 6.b5 Rc8 7.Nf3 Bg6 (7...dc4 8.Bc4 cb5 9.Bb5=+) 8.Be2 (8.bc6 bc6 9.cd5 ed5=) 8...Ngf6 (8...dc4 9.Bc4 cb5 10.Bb5=+) 9.0–0 (9.d3 Bb4 10.Bc3 Bc3 11.Nc3 Qa5=+) 9...Bd6 (9...dc4 10.Bc4 cb5 11.Bb5=+) 10.d4 (10.d3 dc4 11.dc4 Qc7=) 10...0–0 (10...dc4 11.Bc4 cb5 12.Bb5=+) 11.Nbd2 Qe7 12.a5 cb5 13.c5 Bb8 14.Bb5 Ne4 15.a6 b6 16.c6 Ndf6 17.Ne4 Be4 (17...Ne4 18.Ba3 Bd6 19.Bd6 Nd6 20.Qa4=) 18.Ne5 Ne8 (18...Bd6 19.Rc1+=) 19.f3 Bg6 (19...Qb4 20.Qe2 Nd6+–) 20.Nd7+– Nd6 21.Ba3 (better 21.Nf8!? Qf8 22.Ba3+–) 21...Rfd8+= 22.Rc1 (22.Nb8 Rb8 23.Rc1 Rbc8+=) 22...Qe8 (22...Qh4 23.Be2 Bc7 24.Qe1=) 23.Nb8 (better 23.Bd3 Bd3 24.Qd3 Rc6 25.Rc6 Qd7 26.Rc3+=) 23...Rb8?? (23...Nb5!? 24.Qb3 Na3 25.Qa3 Rc7=+ (worse 25...Rb8 26.c7+–)) 24.c7 (better 24.Bd6 Rbc8 25.Bf4+–) 24...Nb5+= 25.cb8Q Rb8 26.Bb2 (26.Bb4 e5+–) 26...Rc8 (26...Qd8 27.Re1+=) 27.Qa4 Nd6 (27...Rd8 28.Rfd1+=) 28.Qe8+– Re8 29.Ba3 (29.Rc7!? Bd3 30.Rfc1+–) 29...Nb5= 30.Bb4 Bd3 31.Rfd1 Bc4 32.e4 (32.Ra1 f6=) 32...Nc7 33.Bd6 Na6 34.Rc3 b5 (34...Nb8!?=) 35.Ra1+= b4 36.Rc4 dc4 37.Ra6 b3 38.Ba3?? (better 38.Ra7 h6 39.Ba3+–) 38...c3–+ 39.Ra7 Rb8 Black intends b2 40.Rc7 b2 41.Rc3 (41.h4 b1Q 42.Kh2 c2–+) 41...b1Q 42.Bc1 Qa2 (42...Qb4 43.Re3 Rc8 44.Kf2–+) 43.d5 (43.h3 Qa1 44.Rc6 h5–+) 43...h6 (better 43...Qe2 44.Re3 Qd1 45.Kf2 Qc1 46.Re2–+) 44.de6 fe6 45.g4 (45.Kf1 Qa1 46.Rc2 Rb1–+) 45...Qa7 (45...Rd8 46.Bd2 Rd2 47.Rc8 Kh7 48.Rc1 Rg2 49.Kh1 Rh2 50.Kg1 Qf2) 46.Be3 (46.Kg2 Qd4 47.Rc7 Qd1–+) 46...Qa5 (better 46...Qa6 47.Rc1 Qe2–+) 47.Rc5 (47.Rc1 Rb3 48.Bf2 Qg5–+) 47...Qa3 (47...Qe1 48.Kg2 Rb2 49.Rc2 Rc2 50.Bf2 Qf2 51.Kh3 Qh2) 48.Kf2 (48.Bf2 Qa1 49.Kg2 Rb2 50.Rc8 Kf7 51.Rc7 Ke8 52.Rc8 Kd7–+) 48...Qa2 (48...Rb2 49.Rc2 Rc2 50.Kg3 Qe3 51.Kh4 Qf3 52.h3 Qf6 53.g5 Qg5) 49.Rc2 (49.Kg3 Qe2 50.Bd4–+) 49...Qa3 (49...Qc2 50.Kg3 Rb2 51.Bf2 Qf2 52.Kf4 Qh2 53.Ke3 Qd2) 50.Re2?? (50.Rc5 Rb2 51.Kf1 Qd3 52.Ke1 Qe2) 50...Rb2 (50...Qd6 51.Kg2–+) 51.h4 (51.Rb2 Qb2 52.Kg3 g5–+) 51...Rb3 52.h5 (52.f4 Qa4 53.e5 Qc6–+) 52...Rb2 (52...Qa1 53.Re1 Qe5 54.Kg2–+) 53.g5 (53.Rb2 Qb2 54.Kg3 Qc3–+) 53...Qa2 (better 53...Re2 54.Ke2 Qa2 55.Bd2 hg5–+) 54.g6 (54.Rb2 Qb2 55.Kg3–+) 54...Re2 55.Kg3 Qd2! 56.Kf4 (56.Bd2 Rd2 Combination) 56...Rg2 (56...Qe3 57.Ke5 Rd2 58.Ke6 Qc3 59.e5 Qc8 60.Ke7 Qd7) 57.Ke5 (57.Bd2 Rd2 58.Kg3–+) 57...Qd3 (57...Qe3 58.Kd6 Qb6 59.Ke7 Rd2 60.e5 Qc7 61.Ke6 Qd7) 58.Bf4 (58.Bf4 Ra2 59.Bg3 Ra5 60.Ke6 Qc4 61.Kd7 Ra7 62.Kd6 Ra6 63.Kd7 Qc6 64.Kd8 Ra8 65.Bb8 Rb8 66.Ke7 Re8). BeepBeepImAJeep (2715) – erindreki (2440), lichess.org, 2015.

4.c4 dc4

5.a4 Nf6 6.Bc4 Nbd7 7.b5 Qc7 (7...e6 8.Nf3=+) 8.Be2 (8.Nf3 cb5 9.Bb5 a6 10.Bf6 ef6=) 8...cb5 9.ab5 e5 10.Nf3 Bd6 11.Nc3 0–0 12.h3 e4 13.Nd4 Bg6 14.Rc1 Qd8 15.0–0 Qe7 16.f4 ef3 17.Nf3 (worse 17.Bf3 Qe5 18.Nce2 Qh2 19.Kf2 Ne5–/+; worse 17.gf3 Nc5–/+) 17...Ne5 18.Nb1 Nf3 19.Bf3 Be5 (19...Rad8 20.Qa4=) 20.Be5 (20.Ba3 Bd6 21.Bd6 Qd6 22.Bb7 Rab8=) 20...Qe5 21.Nc3 Ne4 (21...Bd3 22.Rf2 Qe7 23.Qb3=) 22.Ne4 Be4 23.Rc4?? (better 23.Be4!? Qe4 24.Rc7+=) 23...Bf3 (better 23...Bd3 24.Ra4 Bf1 25.Qf1 Rad8–/+) 24.Qf3= f6 (24...Qb5 25.Rc7=) 25.Re4 (better 25.Qb7!? Rab8 26.Qa7 Rb5 27.Rc7+–) 25...Qd5 (25...Qb5!? 26.Re7 Rf7 27.Rf7 Kf7=+) 26.Re7+= Qf3 27.Rf3 (27.gf3 Rf7 28.Rf7 Kf7+=) 27...Rf7= 28.Re6 (28.Rf7 Kf7 29.e4 a5=) 28...Rd7=+ 29.d4 Rad8 30.Rf2 Kf7 31.Re4 Re7 (31...Rd5 32.Ra2 Rb5 33.Ra7 g5=) 32.Ref4 (better 32.Re7 Ke7 33.Ra2+=) 32...Re3–/+ 33.Ra2 Ra8 34.Rf5 Re6 35.Rc5 a6 36.Rc7 (better 36.d5 Re7 37.Kf2=+) 36...Kg6?? (better 36...Re7 37.Re7 Ke7 38.ba6 Ra6–/+) 37.Rb7+– ab5?? (better 37...h5+–) 38.Ra8+– Rd6 (38...h6 39.Kf2 Kf5 40.Kf3+–) 39.Rab8 (better 39.Rg8!? f5+–) 39...Rd4 40.Rb5 (40.Rg8 Rd1 41.Kf2 Rb1+–) 40...Rd1 41.Kh2 Rd6 (41...Rd7 42.Kg3+–) 42.Rb3 (42.R5b7 Kh6+–) 42...Kf5 (42...Rd7 43.g4+–) 43.Rg3 (better 43.R3b7 g6+–) 43...Ke6 (43...Rd7+–) 44.Rb6 (44.Rg7 h6+–) 44...g5?? (better 44...Rb6 45.Rg7 h5+=) 45.Rd6 (better 45.Re3!? Kd7 46.Rb7 Kc6 47.Rh7 Kc5+–) 45...Kd6 46.Rf3 1–0. BeepBeepImAJeep (2535) – tarantella (1820), lichess.org, 2017.

5.Bc4 Bb1 6.Rb1+= (6.Qb1 e6 7.Nf3 Nf6 8.0–0 Bd6 9.e4+=) 6...f5 (6...b5!? A) 7.Bf1 a5+= (7...Qd5 8.a4 Nf6 9.ab5+=) 8.a4 ab4 9.ab5+=; B) 7.Be2 a5 8.a4 ab4 9.ab5+=) 7.Nf3+/– e6 (better is 7...Nh6+/– 8.Ne5 Qd6 9.Qh5+– 2.22) 8.Ng5?? (better is 8.Be6 Nh6 9.Qc2+– 2.06 (9.a3+–)) 8...Qg5–+ 9.Qf3 Bb4 (9...Qg6 10.b5 Ne7 11.bc6 Nbc6 12.Ba3–+) 10.Be5 (10.Be6 Qe7 11.Bg7 Bd2 12.Kd2 Qg7 13.Qh5 Qg6 14.Qg6 hg6 15.Rb7–/+) 10...Ne7?? (better is 10...Nd7 11.Bg3 a5 12.Be6 Nc5 13.Qf5 Qf6 (worse is 13...Ne6 14.Qe6 Qe7 15.Qe7 Ne7 16.Be5–+) 14.Qf6 Nf6–+ (14...gf6?! 15.Bg8 Rg8 16.Ke2–+)) 11.Rb4+= Na6 (better is 11...Nd7!? 12.Bf4 Qg6 13.Rb7 e5 14.Rd7 Kd7 15.Be5 Rhe8+/–) 12.Rb7+– Nc5 13.Rb8 (13.Rc7 Nd7 14.Bd6+–) 13...Rb8+/– 14.Bb8 0–0? (better is 14...Nd7 15.Bd6 Qf6+/–) 15.Ba7+– Ne4 16.Bd4 (16.d3 f4 17.Bb6 Nd6 18.Be6 Kh8+–) 16...Rb8 (16...Nd5!?+/–) 17.Be6+– Kf8 18.Bb3 Rb3? (better is 18...c5 19.Ba1 c4+–) 19.ab3 Ng6 20.d3 c5 21.Bg7! Kg7 22.de4 Ne5 23.Qg3 Nd3 24.Kd2 Qg4 25.Qg4 fg4 26.Kd3 Kf6 27.Rc1 h5 28.Rc5 Ke6 29.b4 (29.b4 Ke7 30.Rh5+–) 1–0. Trkn – Foster's, itsyourturn.com, 2000.

5.Bc4 Nd7 6.Qb3 e6 7.Nf3 Ngf6 (7...Be4 8.a3=) 8.Nc3 (8.0–0 Nb6 9.d3 Nc4 10.dc4 Qd3=) 8...Be7 (8...a5 9.ba5 Bd3 10.Na4 Bc4 11.Qc4 Qa5 12.Nc3=+) 9.0–0= Nb6 10.Be2 Nbd5 (10...Bd3 11.b5=) 11.a3 0–0 12.d3 Bg6 (12...Re8 13.Rfc1=) 13.Rfd1 (13.Ne5 Nc3 14.Bc3 Nd5+=) 13...Qc7 (13...a5 14.ba5 Qa5 A) 15.Qb7? Rab8 16.Qc6 Rb2 17.Nd5 Nd5–+ (worse 17...Qd5 18.Qd5 Nd5 19.Rd2–+); B) 15.Ne5=) 14.Rac1 (14.Nd5 Nd5 15.Bd4 a5=) 14...Rac8 (14...a5 15.b5=) 15.Nd5+= ed5 16.Be5 (16.Nh4 Qd6+=) 16...Qd7 17.h3 (17.Bd4 a6+=) 17...a6 (17...Qe6 18.Bd4=) 18.Nd4 (18.Qc3 Qe6+=) 18...Rfd8 (18...Rce8!?=) 19.Bf6+= Bf6 (19...gf6 20.e4 h5 21.Bf3+–) 20.Bg4+– Qd6 21.Bc8 Rc8 22.Nf3 (22.Qc3 b6+–) 22...Re8 (22...Bh5 23.g4 Bg6 24.Re1+=) 23.a4 (23.Re1 Qe6+–) 23...h6 (23...Bh5 24.g4 Bg6 25.d4+–) 24.b5 ab5 (24...cb5 25.ab5 Bh5 26.d4+–) 25.ab5 c5 26.Qa4 (26.e4 d4+–) 26...b6 27.Qa7 Re7 (27...Bb2 28.Rc2 Bf6 29.Ra2+–) 28.Qa8 Kh7 29.Ra1?? (better 29.d4 c4 30.Ne5+–) 29...Ba1=+ 30.Qa1 Qc7 0–1. jaddwarrior (1965) – Cocodiabolo (1880), ChessWorld.net, 2013.

5.Bc4 e6!?+= 6.a3 b5 7.Be2 a5 8.ba5 Ra5 9.d3 =.

5.Bc4 e6 6.a4 Nf6 7.b5 Bc5 8.Nf3 0–0 9.0–0 Bd3 (9...Nbd7 10.bc6 bc6 11.d3=) 10.Bd3 Qd3 11.Ne5 Qf5 12.d4 Bd6 13.Nd2 Be5 (13...Bb4 14.Ba3 Ba3 15.Ra3+=) 14.de5+= Nd5?? (better 14...Ne4+=) 15.e4+– Nc3 (15...Qg6 16.ed5 ed5+–) 16.ef5 Nd1 17.Rad1 (17.Rfd1 ef5 18.Nc4 a6+–) 17...ef5 18.Nc4 cb5 19.ab5 a6 20.Nb6 Ra7 21.Bd4 (21.Ra1 Re8+–) 21...ab5 22.Nd7! Ra4 (22...Nd7 23.Ba7 Discovered attack) 23.Nf8 Kf8 24.Bc5 Ke8 25.Rfe1 (25.Rb1 Nc6+–) 25...Nc6 26.e6 fe6 27.Re6 Kf7 28.Red6 Re4 (28...Rc4 29.Rd7 Ke8 30.Ba3+–) 29.Rd7 Kg6 30.Rb7 Ne5 (30...Kf6 31.f4 g5 32.Ba3 gf4 33.Rd6 Re6 34.Bb2 Ne5 35.Rd5+–) 31.Rb6 Kg5 32.g3 (better 32.Rb5 Kg6 33.Rd6 Kh5 34.f3 Re1 35.Kf2+–) 32...Nd3 (32...Kh5+–) 33.Be3 (better 33.Rd3!? g6+–) 33...Re3 34.fe3 Ne5 35.Rb5 Nf3 (35...Nc4 36.h4 Kh6 37.Kf2+–) 36.Kf2 (better 36.Kg2 Nh2 37.Kh2 g6+–) 36...Nh4 (36...Nh2 37.e4 g6+–) 37.Rdd5 Ng6 38.Rf5 Kh6 (38...Kg4 39.Rg5 Kh3 40.Rh5 Kg4 41.h3) 39.Rh5 1–0. BeepBeepImAJeep (2545) – bfs (1660), lichess.org, 2017.

5.Bc4 e6!?+= 6.Qb3 Nf6 7.Nf3 b5 8.Be2 a5 9.ba5 =.

5.Bc4 e6!?+= 6.b5 a6 7.bc6 Nc6 8.Nf3 Rc8 9.a3 +=.

5.Bc4 e6 6.Nf3 Bb4 7.Bg7 Ne7 8.Bh8 (8...b5 9.Be2+–) 1–0. Grits – audionut, Live Game Caissa's Web, 2004.

5.Bc4 e6 6.Nf3 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 c6).

5.Bc4 Nf6 6.Qb3 (6.b5 e6 7.d3 a6 8.bc6 b5 9.Qf3+=; 6.Nf3 e6 7.a3 b5 8.Be2 a5 9.ba5=) 6...e6 7.Nf3 b5 8.Be2 a5 9.ba5 =.

4.c4 Nd7

5.a3 Ngf6 6.cd5 cd5 7.Nf3 e6 8.d4 Bd6 9.Bd3 Bg4 (9...Bd3 10.Qd3 a5 11.b5+=) 10.Nbd2 0–0 11.0–0 Rc8 12.Rc1 Bb8 13.Qb3 Qb6 14.h3 Bh5 15.Rc8 Rc8 16.Rc1 Rc1 17.Bc1 Qd6 18.g3 e5 (better is 18...Bc7!?=) 19.de5+/– Ne5 20.Ne5 Qe5 21.Bb2 Qe7 (better is 21...Qe6!? 22.Bf6 gf6+/–) 22.Bf6+– Qf6 23.Qd5 h6? (23...Qd6 A) 24.Qh5?! Qd3 25.Nf3 Qd7+/– (25...Qa3? 26.Qc5 g6 27.Qc8 Kg7 28.Qb8+–); B) 24.Qb7 Qd8 25.Nb3+–) 24.Ne4 (better is 24.Qh5 Qd8 25.Bc4 Qe7+–) 24...Qa1 25.Kg2 Be5 (25...Bg6 26.Ng5 hg5 27.Bg6 Qf6 28.Qb7 Bd6+–) 26.Qd8 Kh7 27.Nf6 1–0. Fournier,Frederic – urugallo (1695), Active, 2008.

5.a4 dc4 6.Bc4 Ngf6 7.b5 Qc7 (7...cb5 8.ab5 e6 9.Nf3=) 8.Be2 (8.Nf3 e6=) 8...Nc5 (8...cb5!? 9.ab5 e5=+) 9.d4= Nce4 10.Nf3 e6 11.0–0 Bd6 12.Nbd2 0–0 13.Nc4 Be7 (13...Rfc8 14.Nd6 Qd6 15.Nh4=) 14.Rc1 (14.bc6 bc6 15.Nh4 Nd6 16.Nd6 Bd6 17.Nf5 Bh2 18.Kh1 ef5+=) 14...c5 (14...cb5 15.ab5 Nd5 16.Nfe5=) 15.Nce5 (15.Nh4 Rad8+–) 15...b6 (15...Rfd8 16.Bd3 h6 17.Rc4+=) 16.Nc6 (16.Nh4 Rad8+–) 16...Bd6+= 17.dc5 Bc5 (17...Nc5 18.Be5 Ne8 19.a5+=) 18.Be5 Qb7 19.Nfd4 a6? (19...Nd7 20.Nf5 Ne5 21.Nh6 gh6 22.Ne5+–) 20.Nf5 (better 20.f3 Nd5 21.ba6 Ra6 22.Ba6 Qa6 23.fe4 Ne3 24.Qf3 (24.ef5 Nd1 25.Rfd1 f6=) 24...Nf1 25.ef5+– (25.Rf1?! Bg6+–; 25.Qf1?! Qf1 26.Kf1 Be4+–)) 20...ef5+– 21.Qc2 ab5 22.ab5 (22.Bb5?! Rfc8 23.Bf6 Nf6 24.Qf5 Rc6=+) 22...Rac8 (22...Nd5 23.Bd3 Ne3 24.fe3 Be3 25.Kh1 Bc1 26.Qc1+–) 23.Bf3 (23.Bf6 Nf6 24.Qf5 Rfe8+–) 23...g6 (23...Qd7!?+–) 24.Rfd1+– Rfe8 25.Qb2 (25.Bf6 Nf6 26.Ra1 Rc7+–) 25...Rc6 (better 25...Ng4!? 26.Bg4 fg4+–) 26.bc6+– Qc6 27.Bf6 (27.Rd6 Qc7 28.Re6+– (28.Bf6 Qd6 29.Be4 fe4=+; 28.Rf6?! Qe5 29.Qe5 Re5+=)) 27...Qf6+– 28.Qf6 Nf6 29.Rb1 Ne4 30.Be4 (30.Rb2 Kg7+–) 30...fe4+= 31.Rd7 f5 (31...Ra8 32.g4+=) 32.g3 (32.Ra1 Re7 33.Re7 Be7 34.Ra7+–) 32...Re7 (better 32...h5!?+=) 33.Re7+– Be7 34.Rb6 Kf7 35.Rb5 Kf6 36.h4 Ke6 37.Ra5 h5 38.Ra4 Kf7 (38...Ke5 39.f3!+–) 39.Kg2 (39.f3 ef3 40.Kf2 Bd6+–) 39...Bf6 (39...Ke6 40.f3 Kd5 41.Ra5 Ke6 42.fe4 fe4 43.Kh3+–) 40.f3 Ke6? (better 40...ef3 41.Kf3 Be5+–) 41.fe4 fe4 42.Re4 Kf5 43.Kf3 Be5 (43...g5 44.hg5 Kg5 45.Re8+–) 44.g4 (44.Re5 Ke5 45.e4 Ke6+–) 44...hg4 45.Rg4 Bf6 (45...Bc7+–) 46.e4 Ke6 (46...Ke5 47.Kg3 Bh8 48.Rg6 Ke4 49.Kg4+–) 47.Kf4 (better 47.Rg6 Ke7 48.Rf6 Kf6 49.Kf4+–) 47...Kf7 48.Kf3 Be7?? (48...Ke6 49.Rg6 Ke7 50.Rf6 Kf6+–) 49.Rg2 (49.e5!? Bd8+–) 49...Bd6 (49...Bh4 50.Kf4 Be7+–) 50.Rh2 (50.Kg4 Be5+–) 50...Be5?? (better 50...Bh2 51.Kg4 Kf6–+) 51.Rh3 Bf6 52.h5 (better 52.Kg4 Ke6+–) 52...Be5 (52...gh5 53.Rh5 Ke6 54.Kf4+–) 53.hg6 (53.h6!? Kg8+–) 53...Kg6 54.Kg4 Kf6 (54...Bg7 55.Kf4 Kf6 56.Rh7+–) 55.Rh5 (better 55.Rh6 Kg7 56.Kf5+–) 55...Bd6 (55...Bc3 56.Rc5 Bd4 57.Rc4+–) 56.Rf5 (better 56.Rh6 Ke5 57.Rd6 Ke4 58.Rd1+–) 56...Ke6 57.Kf3 Be7 (57...Be5 58.Rh5+–) 58.Ke2 (58.Kf4 Bb4+–) 58...Kd7 (58...Bf6 59.Kd3+–) 59.Kd3 Bd6 60.Kd4 White prepares e5 60...Ke7 61.Kd5 Bc7 62.e5 Kd8 (62...Ba5+–) 63.Rf6 Bb6 (63...Ba5 64.Ke6 Bb4+–) 64.Rb6 Kc7 65.Re6 (65.Rd6 Kc8 66.e6 Kb7 67.e7 Kc8 68.e8Q Kc7 69.Qe7 Kc8 70.Rd8) 65...Kd7 (65...Kb7 66.Rd6 Kb8 67.e6 Kb7 68.e7 Kc7 69.e8Q Kb7 70.Qe7 Kc8 71.Rd8) 66.Rd6 White prepares the advance e6 66...Ke7 67.e6 Ke8 (67...Kf6 68.Ra6 Ke7 69.Ke5 Ke8 70.Kf6 Kd8 71.Rc6 Ke8 72.Rc8) 68.Rd7 (68.Rd7 Kf8 69.Rf7 Kg8 70.Kc4 Kh8 71.e7 Kg8 72.e8Q; 68.Ke5 Ke7 69.Rd7 Kf8 70.Kf5 Kg8 71.Rd8 Kg7 72.e7 Kh6 73.e8Q Kg7 74.Qg6) 1–0. BeepBeepImAJeep (2760) – markovits75 (2535), lichess.org, 2020.

5.a4 Ngf6 6.b5 dc4 7.Bc4 e5 8.Nf3 Bd6 9.0–0 e4 10.Nd4 Bh2 11.Kh2 (11.Kh1 Bg4 12.f3 ef3 13.gf3= (worse 13.Kh2 fg2 14.Rf3 Ne5–/+)) 11...Ng4=+ 12.Kg3 Qg5 13.f4 Qg6 14.Bf7? (better 14.Qb3 Ne3 15.Kf2 Nf1 16.Kf1=) 14...Kf7–+ 15.Qb3 Ke8 16.Nf5 (16.bc6 bc6 17.Nf5 Ne3 18.Kf2 Qg2 19.Ke3 Qh3 20.Ke2 Qb3 21.Ng7 Kf7 22.Bc3–+) 16...Qf5 (better 16...Ne3 17.Kf2 Qg2 (17...Nf5?! 18.Re1–/+) 18.Ke3 Qh3 19.Kf2 Qb3 20.Bg7 Rg8–+) 17.Qd1? (17.bc6 bc6 18.Qd1–+) 17...h5–+ 18.Rh1 Nf8 (better 18...Qg6 19.Qe2 h4 20.Rh4 Ne3 21.Rg4 Ng4 22.Qg4 Qf7–+) 19.d3?? (19.bc6 Qg6 20.Qe1 Ne3 21.Kf2 Qg2 22.Ke3 Qf3 23.Kd4 Qd3 24.Ke5 Ng6 25.Kf5 Qd5 26.Be5 Rf8 27.Kg6 Qf7 28.Kh7 Qf5 29.Kg7 Rf7 30.Kh8 Qh7) 19...ed3 (19...h4 20.Rh4 Rh4 21.de4 Qh7 22.bc6 A) 22...Qe4?! 23.cb7 Rb8 24.Qf3 (worse 24.Kh4 Ne3 25.Qf3 g5 26.Kg3 gf4 27.Kh2 Qf3 28.gf3 Rb7–/+) 24...Qf3 25.gf3=; B) 22...bc6–+) 20.e4 Qg6 (20...Qe4 21.Re1 Ne3 22.Qd2 h4 23.Kh3+–) 21.f5 (21.Kf3 Ne6 22.f5 Ng5 23.Kf4–+) 21...Qg5 22.Bc1 (22.Qe1 h4 23.Kf3 Ng6–+) 22...Ne3 23.Kf3 Nd1 (23...Ng6 24.Be3 Ne5 25.Kf2 Ng4 26.Qg4 A) 26...hg4?? 27.Rh8 (27.Bg5?! Rh1 28.Ke3 Rd1+=) 27...Kf7 28.Bg5 Rh8 29.Ra3+–; B) 26...Qg4–+) 24.Bg5+– Nb2 25.Nd2 Nc4?? (better 25...c5+–) 26.Nc4+– Nd7 27.Nd6 (27.Nd6 Kf8 28.Nb7 cb5 29.ab5+–) 1–0. BeepBeepImAJeep (2765) – markovits75 (2530), lichess.org, 2020.

5.Qb3 e6 6.Nf3 Ngf6 7.Nc3 Be7 8.Be2 0–0 (8...dc4 9.Bc4 a5 10.ba5+=) 9.cd5= Nd5 10.Nd5 cd5 11.0–0 Rc8 12.Rac1 Qb6 13.a3 Nc5? (better is 13...Bf6=) 14.Qc3+– Bf6 15.Ne5 (15.bc5 Bc3 16.cb6 Bb2 17.Rc8 Rc8 18.ba7 Ra8+=) 15...Be5 16.Qe5 f6 17.bc5 (17.bc5 Rc5 18.Qd4+–) 1–0. Hlavinka,Zdenek – Traczewski,Wojciech, Brno Duras BVK op–A, 2002.

5.b5 cb5 6.cb5 (6.cd5 a6=) 6...e5+= 7.Nf3 Bd6 8.Nc3 Ngf6 9.Be2 0–0 10.–0 Rc8 11.Rc1 Re8 12.a4 Nc5 (12...Qa5!?+=) 13.d4= ed4 14.Nd4 (worse is 14.Qd4 Nb3 15.Qh4 Nc1 16.Rc1 Qa5–+) 14...Bg6 15.Nb3 (15.Re1 Qa5=) 15...Nce4 (15...Nb3 16.Qb3 d4 17.Nd5 Nd5 18.Rc8 Qc8 19.Qd5+=) 16.Bf3 (16.Ne4 Ne4 17.Rc8 Qc8=) 16...Bc7 17.Nd2 (17.Ne4 de4 18.Qd8 Red8= (18...Rcd8? 19.Bf6 gf6 20.Rc7 ef3 21.gf3+–)) 17...Qd6 18.g3 Ng5 19.Bg2 Bf5 (19...Bb6 20.h4 Ne6 21.Nb3=) 20.Nf3 (20.Nd5 Nd5 21.Nc4 Qg6 22.Qd5 Nh3 23.Bh3 Bh3+/–) 20...Nh3 (20...Bg4 21.Kh1 Qb4 22.Ba1 Nf3 23.Bf3=) 21.Kh1 Nf2 (21...Ne4!? 22.Ne4 de4= (worse is 22...Re4 23.Nd4 Bd7 24.Be4 de4 25.Qh5+–)) 22.Rf2+/– Ng4 23.Re2 Qh6?? (23...Ne3 24.Qd2 Ng2 25.Re8 (25.Rg2 Bg4 26.Rf2 Bb6=) 25...Re8 26.Nd5+– (26.Qg2?! d4+=)) 24.Kg1 (better is 24.Nd5 Bd6 25.Rc8 Rc8 26.Bd4+–) 24...Ne3 (24...Re3 25.Rd2 Bb6–+) 25.Qe1 (better is 25.Qd2 Bb6 26.Kh1+/–) 25...Bd3+= 26.Nd5 (26.Re3!? Re3 27.Qd2–/+) 26...Be2–/+ 27.Nc7 Ng2 28.Ne8 (28.Qf2 Re7 29.Kg2 Bf3 30.Kf3 Rec7 31.Rc7 Qh5 32.g4 Qd5 33.Kg3 Rc7 34.Qd4 Qd4 35.Bd4–+) 28...Ne1 (28...Re8? 29.Kg2 Qh5 30.Nd4+–) 29.Nf6 gf6 (29...Qf6 30.Rc8) 30.Rc8 Kg7 31.Ne1 Qd2 32.Bc3 (32.Rc1 Qb2 33.Rc2 Qd4 34.Kg2 Bd1–+) 32...Qe3 33.Kg2 (33.Kh1 Qe4 34.Kg1 Qf5–+) 33...Qe4 (33...Bg4 34.Rd8–+) 34.Kg1 Qf5 35.h4 Qc8 (35...Qc8 36.Bd4 Qg4–+) 0–1. Sieradzka,A – Gabler,M, Zamosc Poland–ch U14 Girls, 1999.

5.b5 e5 6.Nf3 Bd6 7.bc6 bc6 8.cd5 cd5 9.Bb5 +=.

5.b5 e5 6.Nf3 Bd6 7.Be2 Ngf6 8.0–0 0–0 9.a4 Re8 10.d3 Qc7 (10...dc4 11.dc4 Qc7 12.Nh4–/+) 11.h3 (11.Ba3 d4=+) 11...h6 (11...dc4 12.dc4 Nc5 13.Nbd2–/+) 12.Nc3 (12.Nbd2 Rad8=) 12...a6 (12...dc4 13.dc4 Nc5 14.Nh4–/+) 13.Rc1 (13.d4 dc4 14.ba6 ba6 15.Bc4 c5=) 13...ab5 14.ab5 Be6 (14...dc4 15.dc4 Nc5 16.Ra1=+) 15.bc6 bc6 16.cd5 Nd5 17.Ne4 (17.Nb5 Qb8 18.Nd6 Qd6=) 17...Rab8 (17...Ra2 18.Ba1=) 18.Qc2 Rec8 (18...Nb4 19.Qd2=) 19.Nd6 Qd6 20.Ba1 (20.Nd2 Nb4 21.Ne4 Qe7=) 20...c5 21.Rfd1 (21.Nd2 Nb4 22.Nc4 Qe7=) 21...f6 (21...Nb4 22.Qd2=+) 22.Nd2= Nb4 23.Ne4 Qe7 24.Qd2 Na2 (24...f5 25.Ng3=) 25.Rb1 Rb4 Black intends c4 26.Bc3 (26.Rb2 Ra8=) 26...Rb1 (26...Nc3 27.Nc3 Rcb8 28.Bf3=) 27.Rb1 Nc3 28.Qc3 Rc7 (28...f5 29.Nd2=) 29.Bd1 c4 (29...f5 30.Nd2=) 30.dc4 (30.Nd2!?+–) 30...Rc4= (30...Bc4 31.Nd2 Qf7 32.Rb4+–) 31.Qd3 Rc8 (31...f5 32.Nd6 e4 33.Qa3=) 32.Bb3 Nc5 33.Nc5 Rc5 34.Be6 (34.Ra1 Bb3 35.Qb3 Kh7=) 34...Qe6= 35.Rb8 (35.Rb7 Rc1 36.Kh2 f5+–) 35...Rc8 36.Rb7 Re8?? (better 36...e4 37.Qd7 Qd7 38.Rd7 Kh7=) 37.Qg6+– (37.Qg6 Qe7 38.Re7 Re7 39.Kf1+–) 1–0. BeepBeepImAJeep – dessembre2016 (1760), IM BeepBeepImAJeep simul, 2017.

5.Nc3 Nb6 6.cd5 Nd5 7.a3 (7.Qf3 Nh6 8.Nd5 Bg4=) 7...e6 8.Nf3 Ngf6 9.Be2 Be7 10.0–0 0–0 11.d3 h6 (11...Nc3 12.Bc3 Nd5 13.Bd4=) 12.Rc1 (12.Nd5 Nd5 (worse is 12...Qd5 13.e4 Ne4 14.de4 Be4 15.Qc1+–; 12...cd5?! 13.Nd4=; 12...ed5?! 13.Qd2=) 13.e4 Bf6+–) 12...Bg6 (12...Nc3 13.Bc3 Nd5 14.Bd4=) 13.g3 (13.Nd5 Nd5 14.Ne5 a5 15.Ng6 fg6 16.ba5 Ra5+=) 13...Rc8 (13...a5 14.Nd5 ed5 15.b5 cb5 16.Ne5+=) 14.e4 Nc7 15.Na4 Qd7 (15...Nb5 16.Ne5=) 16.Ne5+= Qd8 (16...Qe8 17.Nc5 b6 18.Nb3+/–) 17.Ng6 (17.Nc5 Bc5 18.bc5 Nb5+=) 17...fg6+= 18.Qb3 Kh8 (18...Rb8!?+=) 19.Nc5+/– Bc5 20.Rc5 (20.bc5 Rb8+/–) 20...Nd7 21.Rc2 e5 (21...Nf6 22.f4+/–) 22.a4 (22.d4 Nf6+/–) 22...Ne8 (22...Qg5 23.d4 ed4 24.Bd4+/–) 23.Bg4 (23.d4 ed4 24.Bd4 Qe7+/–) 23...Nef6 24.Bh3 (24.Be6 g5+=) 24...Qe7 (24...g5 25.Qe6+=) 25.Ba3 (25.f4 ef4 26.gf4 Rcd8+/–) 25...Rc7 (25...Qd6 26.f4+=) 26.Rfc1 (26.Qe6 Qe6 27.Be6 g5+/–) 26...Rd8 (26...Qd6 27.Be6=) 27.a5 Nb8 (better is 27...Qd6!?+=) 28.b5+– Qe8 29.b6 ab6 30.ab6 (30.Qb6?! Na6 31.Rc3 Nd7+/–) 30...Rf7 31.Be6 Rd3 32.Bf7 Rb3 33.Be8 Ne8 34.Bc5 (34.Rd2 Ra3 35.Rd8 Kh7+–) 34...Nd7 35.Rd1 (35.f4 Nef6 36.Re2 Nc5 37.Rc5 Nd7+/–) 35...Nc5 (35...Nef6!?+=) 36.Rc5+/– Nf6 37.Re5 Rb6 38.Re7 Rb2 39.Rd8 Kh7 40.Rb8 (40.Rf8 Ne4 41.Re4 Rd2+–) 40...b5? (40...g5 41.Reb7 Rb7 42.Rb7 Ne4 43.Rb2+–) 41.Rbb7 Nh5 42.Rec7 Rc2 43.Rb5! Nf6 44.f3?? Rc1 45.Kg2 Nh5?? 46.Rb6+– Rc2 47.Kh3 c5 48.Rbc6 Rc3 49.Rc5 Rf3 50.Kg4 Ra3 51.e5 Ra2 52.h3 Ra3 53.Rc3 Ra5 54.Re3 Kg8 55.Rc8 Kf7 56.e6 Ke7 57.Rc7 Ke8 58.e7 Ra8 59.Rf3 Ra4= 60.Rf4 Nf4 61.gf4 Re4 62.h4 Re7 63.Re7 Ke7 64.f5 Kf6 65.fg6 Kg6 66.h5 Kf7 67.Kf5 Kg8 68.Ke5 Kf8 69.Kf4 ½–½. Reimer,Karl (1700) – Grube,B, Pfalz GER, 1991. (Even known as Reimer–Detzel)

5.Nc3 dc4 6.e4 Be6 7.Nf3 =+.

5.c5 e5 6.Be2 Ngf6 7.Nf3= e4 8.Nd4 Bg6 9.Nc3 Be7 10.f3 ef3 11.Bf3 0–0 12.0–0 Qc7 13.d3 Rfe8 14.e4 de4 15.de4 Opening the d–file gets Black a lot of play Rad8 16.Qb3 Ne5 17.Rae1 Nf3 18.gf3 Rd4–+ 19.Ne2?? Rdd8 20.e5 Nd5 21.f4 Qd7 22.Ng3 Qg4 23.Bc1 Bh4 24.Kh1 Bg3 25.hg3 Re6 26.Kg2 Bf5 27.Rh1 Nf4! 28.Bf4 (28...Rd3 29.Qd3 Bd3 30.Rh4–+). grain – Nobleworld, Live Game Caissa's Web, 2005.

5.c5 e5+= 6.Nf3 Qc7 (6...Qf6 7.Be2=) 7.Be2 Ngf6 (7...0–0–0 8.d4=) 8.Nc3 (8.0–0 Be7=) 8...h6 (8...b6 9.d4=) 9.d4 e4 10.Nd2 Be7 11.h3 (11.0–0 0–0=) 11...0–0 (11...b6 12.0–0=) 12.0–0 Nh7 (12...b6 13.Qc2=) 13.Qb3 (13.Qe1 Ng5=) 13...Bg5 (13...Rfe8 14.b5=) 14.Nd1 (14.b5 Nhf6=) 14...Be6 (14...Nhf6 15.b5=) 15.Re1 (15.b5 cb5 16.Nc3 b6 17.Nb5 Qc6 18.cb6 Qb6+= (worse is 18...ab6 19.Ba3+/–)) 15...f5 (15...Nhf6 16.Nc3=) 16.Nf1 (16.b5 Nhf6=) 16...f4+= 17.Bg4 (17.Nd2!? Nhf6 18.b5+=) 17...Bg4–/+ 18.hg4 Ndf6 (18...Nhf6 19.Nh2–/+) 19.f3 (19.Bc1 Rf7–/+) 19...Bh4 20.Re2 ef3 (20...Ng5 21.Nd2–/+) 21.gf3 Rae8 (21...fe3!? 22.Nde3 Rae8–/+) 22.e4+= Ng5 23.Nf2 (23.e5 Qf7+=) 23...Bf2 (23...Qf7 24.e5–/+) 24.Kf2+= Nfe4 (24...Re6 25.e5 Nd7 26.Kg2+=) 25.fe4 Ne4 26.Kf3 (26.Ke1+=) 26...Ng5 (26...Qe7 27.Qc2 Qh4–+) 27.Kf2= Re2 (27...f3 28.Re3+=) 28.Ke2 Qe7 (28...Qd7 29.Nh2=) 29.Kd2 Qe4 30.Qd3 Qg2+= 31.Kc3 Re8 32.a3 Re2 33.Rb1 Rf2 34.Kb3 Rf3 35.Ne3 Re3 36.Qc3 Ne4 37.Re1 Nc3 38.Bc3 Qd2 39.Re3 Qe3 (39...Qe3 40.b5 f3–+; 39...fe3?! 40.Bd2 ed2 41.Kc2–+) 0–1. Davis,C – Wren,G, Austin TX USA, 1993.

5.Nf3 (--> 4.Nf3 Nd7 5.c4).

5.cd5 cd5

6.Nc3 e6 7.Nf3 Bb4 8.Bb5 (better is 8.Nd5 Bf8 9.Nf4=) 8...a6?? (better is 8...Ngf6–/+) 9.Bd7+– Qd7 (9...Kd7? 10.Qa4 b5 11.Nb5+– (11.Qb4?! Nf6+–)) 10.Ne5?? (better is 10.Nd5!? Bf8 11.Nb6+–) 10...Qd6 (better is 10...Qe7 11.Qa4 Kd8 12.Nf7 Qf7 13.Qb4 Rc8+=) 11.Nf3?? (better is 11.Qa4 Kf8 12.Nd7 Ke7 13.Nb5 ab5 14.Qa8+/–) 11...Nf6 12.0–0 (12.Qa4 Ke7–/+) 12...0–0 13.Ng5 (13.a3 Ba5–/+) 13...h6 (13...Bd3 14.Ne2–+) 14.Nf3 Bd3 15.Re1 e5 16.Ne2 Ng4 (16...Rfe8!? 17.a3 Ba5 18.Nc1–+) 17.a3 e4 (better is 17...Ba5–/+) 18.h3? (better is 18.Nf4 Ba5 19.Nd4+=) 18...ef3–+19.hg4?? (19.Nf4 Be2 20.Qa4 Nf2 21.Qb4 Qb4 22.ab4 Nd3 23.Nd3 Bd3 24.gf3 Rac8–/+) 19...fe2 20.Re2 Be2 21.Qe2 Ba5 22.Qd3 Rac8 23.Qd4 f6 24.e4 Qe5 25.Qe5 fe5 26.Be5 de4 27.Ra2 Bb6 28.Bg3 Rc1 29.Kh2 Bf2 (29...Bf2 30.Be5 b5–+) 0–1. Steve20 – golly1, ChessWorld.net, 2007.

6.Nf3 e6 7.a4 Ngf6 (7...Bb4?? 8.Bg7 Rc8 9.Bh8+–) 8.b5 Bd6 9.Be2 0–0 10.0–0. GuestVMZB – GuestSKBB, freechess.org, 2018.

6.Nf3 e6 7.Nc3 Bb4 8.Qa4 Bd6 (better 8...Bc3!? 9.Bc3 f6=+) 9.Nb5+= Bb8. GuestNSDK – GuestTDTH, freechess.org, 2017.

6.Nf3 f6 7.Nh4 Bg6 (7...Nh6!?=) 8.Ng6+– hg6 9.Bd3 (better 9.Qg4 Kf7 10.Bb5+=) 9...Ne5? (better 9...f5!?+=) 10.Be5+– fe5 11.Bg6 Kd7 12.Bf7 (better 12.Qa4 Ke6 13.h4+–) 12...a6? (better 12...e6+–) 13.Bd5+– Qb6 14.Qg4 Kc7 (14...Kd8+–) 15.Qc4 Kb8 (15...Kd7 16.Bg8 e6 17.Bh7+–) 16.Bg8 1–0. DEFFM – receficebrumbrum, freechess.org, 2018.

6.Nf3 Ngf6 7.Be2 e6 8.a3 Be7 9.d3 0–0 10.Nh4 Bg6 11.Ng6 hg6 12.0–0 b5 13.Nd2 a6 14.Rc1 Rc8 15.Qb3 Qb6 16.Nf3 Rc7 17.Rc7 Qc7 18.Rc1 Qb6 19.Nd4 Qb7 20.Nc6 Bd6 21.Bf3 (21.Qc2!?+=) 21...Rc8= 22.Nd4 (better 22.Qc3!? Kf8 23.Qc2=+) 22...Rc1–/+ 23.Bc1 Qc7 24.Bb2 Ne5 (better 24...e5!? 25.Nc2 e4–/+) 25.h3 Nf3 26.Nf3 (worse 26.gf3 e5 27.Ne2 Qd7=+) 26...Nd7 27.Bd4?? (better 27.Qd1=) 27…Qc1 (27...Qc1 28.Qd1 Qd1 29.Ne1 Qe1) 0–1. GuestVQCF – ExodusudoxE, freechess.org, 2017.

6.Nf3 Ngf6 7.Be2 e6 8.b5 Rc8 A) 9.Nc3 A1) 9...Nc5 10.d3 (10.Rc1 Bd6 11.d3 0–0 12.0–0 Bg4 13.Na4=) 10...Bd6 11.0–0 Bg4 12.Rc1 0–0 13.Na4=; A2) 9...e5 10.Qa4 (10.Rc1 Bd6 11.d4 e4 12.Nd2 Nb6 13.a4=; 10.–0 Bd6 11.Rc1 0–0 12.d4 e4 13.Nd2+=; 10.Nh4 Be6 11.Nf3 Bd6 12.0–0 0–0 13.Rc1+=) 10...Qb6 11.0–0 Bd6 12.Rac1 0–0 13.d4=; A3) 9...Bd6 10.Nh4 (10.–0 e5 11.Rc1 0–0 12.d4 e4 13.Nd2+=; 10.Rc1 e5 11.0–0 0–0 12.d4 e4 13.Nd2+=) 10...Bg6 11.Rc1 Nb6 12.d3 d4 13.ed4+=; B) 9.Nd4 B1) 9...Bg6 10.f4 (10.Nc3 Nc5 11.Nf3 Nd3 12.Bd3 Bd3 13.Ne5+=) 10...Bc5 11.0–0 0–0 12.a4 Ne4 13.a5=; B2) 9...Be4 10.f3 (10.–0 e5 11.Nf3 Bd6 12.Nc3 Bf5 13.Rc1+=) 10...Bg6 11.f4 Nc5 12.f5 ef5 13.0–0+=; C) 9.0–0 Bc2 10.Qe1 (10.Qc1 Bd6 11.Nc3 Be4 12.Qd1 Ng4 13.g3+=) 10...Nc5 11.Ne5 Nfd7 12.f4 Bf5 13.Qd1=.

6.Nf3 Ngf6 7.Be2 e6 8.b5 Be7 9.0–0 h6 (9...0–0 10.Nh4 (10.Nc3 e5 11.Rc1 Rc8 12.d4 e4 13.Nd2=; 10.d3 Bg4 11.Nc3 e5 12.Qa4 Be6 13.Rfc1=; 10.Nd4 Bg6 11.f4 Bc5 12.Nb3 Bd6 13.Nc3=) 10...Bb1 11.Qb1 Rc8 12.Nf3 Qa5 13.Bc3=; 9...Rc8 10.Nd4 (10.d3 Qa5 11.a4 Bd6 12.Nh4 Bg6 13.Nd2=; 10.Nc3 e5 11.Rc1 0–0 12.d4 e4 13.Nd2=) 10...Bg6 11.f4 Bc5 12.a4 0–0 13.a5=) 10.Nd4 (10.Nc3 0–0 11.Rc1 e5 12.d4 e4 13.Nd2=) 10...Bh7 (10...Bg6 11.f4 Bc5 12.Nb3 Bd6 13.Nc3=) 11.f4 (11.Nc3 0–0 12.f4 Rc8 13.Rc1=) 11...0–0 (11...Rc8 12.Nc3 Nb6 13.d3=) 12.Nc3 (12.a4 Rc8 13.d3=) 12...Bc5 (12...Rc8 13.d3=) 13.Nb3 (13.Na4=) 13...Bd6 14.a4 Nc5 15.Nc5 Bc5 16.d4 (16.a5 Rc8=) 16...Bb4 17.Qb3 Qa5 18.Na2 Be7 19.Bc3 Qd8 20.Bb4 Ne4 21.Bd3 Rc8 22.Be4 Be4 23.Rac1 Qd7 24.Qa3 Bb4 25.Qb4 Bd3 26.Rfe1 (26.Rc8 Rc8 27.Rc1 Rc4 28.Rc4 dc4=) 26...Rc1 (26...a6 27.b6=) 27.Rc1= Bc4 28.Nc3 ½–½. Plock,Joerg – Greinert, Ueckermuende, 1999.

6.Nf3 Ngf6 7.Be2 e6 8.b5 Be7 9.Nc3 A) 9...Rc8 10.Nh4 (10.0–0 e5 11.d4 e4 12.Nd2 0–0 13.Qa4=; 10.Rc1 e5 11.d4 e4 12.Nd2 Nb6 13.0–0=) 10...d4 11.ed4 Be4 12.Rc1 0–0 13.Ne4=; B) 9...Nc5 10.Rc1 (10.d3 0–0 11.0–0 Rc8 12.Rc1 Bg4 13.Na4=) 10...0–0 11.d3 a6 12.ba6 Ra6 13.0–0=; C) 9...e5 10.0–0 (10.Rc1 0–0 11.d4 e4 12.Nd2 Nb6 13.0–0=) 10...0–0 11.d4 e4 12.Nd2 Bd6 13.Qb3=.

6.Nf3 Ngf6 7.Be2 e6 8.b5 Be7 9.d3 Qa5 10.Nc3 (10.Bc3 Qb5 11.Nd4 Qb6 12.Nf5 ef5 13.Nd2+=; 10.Qd2 Qb5 11.Nd4 Qb6 12.Nf5 ef5 13.0–0+=) 10...Bb4 11.Qd2 Rc8 12.Rc1 Bg4 13.a3 +=.

6.Nf3 h6 7.Qa4 a6 8.Nd4 e6 (8...Bg6!?=) 9.Nf5+– ef5 10.Be2 Bd6? (10...Ngf6 11.0–0+=) 11.0–0 (better 11.Bg7!? Rh7 12.Bc3+–) 11...Ngf6+= 12.Bf6 (12.Nc3 0–0+=) 12...Qf6 13.Nc3 b5? (better 13...d4!? 14.ed4 Qh4+–) 14.Nb5! 0–0 (14...ab5 15.Qa8 Double attack (15.Qa8 Pinning; 15.Qa8 Deflection)) 15.Nd6 Qd6 16.d4 (16.Rfc1 Rab8+–) 16...Nb6+– 17.Qb3 Rfc8 (17...f4 18.Rac1+–) 18.Rac1 Rc1 19.Rc1 g6 (19...f4 20.ef4 Qf4 21.Qe3+–) 20.Rc5 Nc4? (better 20...f4+–) 21.Bc4 dc4 22.Qc4 Qb6 (22...Kg7 23.a3+–) 23.h3 (23.Rc6!? Qb5 24.Rg6 Kf8+–) 23...a5 (23...Kg7 24.a3+–) 24.ba5 (24.Rc7 Rf8 25.b5 Qb8+–) 24...Ra5 25.Rc8 (25.Ra5!? Qa5 26.Kh2 Qa3+–) 25...Kg7 26.d5 (better 26.a4+–) 26...Qb1?? (26...Qb2+–) 27.Kh2 Ra2 (27...Qb2 28.d6 Qf6+–) 28.Qd4 (28.Qc3 f6 29.Qc7) 28...f6 29.Rc7 Kg8 (29...Kh8 30.Qf6 Kg8 31.Qg7) 30.Qf6 f4 (30...Qg1 31.Kg1 Ra1 32.Qa1 Kf8 33.Qa8) 31.Qg7 1–0. GuestBJCS – asdferwer, freechess.org, 2017.

4.c4 e6

5.a3 a5 6.c5 (6.cd5 ed5 7.b5 Nf6=) 6...ab4 7.ab4 Ra1 8.Ba1 Nf6 (8...b6 9.Nc3=+) 9.Nf3= b6 (9...Be7 10.Bf6 Bf6 11.d4=) 10.d4 (10.Bf6 Qf6 11.d4 Be7=) 10...Nbd7 (10...Be7 11.Be2+=) 11.Bd3 (11.Nc3 Be7=) 11...Bd3 12.Qd3 Qa8 (12...Be7 13.0–0+=) 13.Bc3= Be7 14.0–0 0–0 15.Nbd2 Qb7 16.Ra1 Ra8 17.Ra8 Qa8 18.h3 (18.Ne5 Ne5 19.de5 Nd7 20.cb6 Nb6+=) 18...Qa4 19.Qb1 Ne8 (19...Qa3 20.Qa1 Qa1 21.Ba1=) 20.Nf1 (20.Qb3 Qb5=) 20...Bf6 (20...Nc7 21.Ng3+=) 21.Ng3 Nc7 22.Nh5 Bd8 23.Nf4 (23.Bd2 Nb5=) 23...Nb5 24.Bd2 Na3 25.Qd3 (25.Qc1 Nc4+=) 25...Nc4 (25...Bc7 26.Ng5 Qd1 27.Kh2+=) 26.Be1 (26.Bc3 Bc7+=) 26...Nf6 (26...Qa1 27.Qc3 Qd1 28.Qd3+=) 27.Ng5 (27.Ne5 Qa1 28.Nf3 Ne4–/+) 27...Qa1–/+ 28.Qc3 (28.Nf3 Ne4–/+) 28...Qd1 29.Nf3 (29.cb6 Bb6 30.Kf1 h6–/+) 29...Ne4 30.Qd3 Ned2! 31.Qe2 (31.Nd2 Qe1) 31...Nf3 32.gf3 Qb1 33.Kg2 (33.Nd3 b5–/+) 33...b5 (33...Qf5 34.cb6 Bb6 35.Qa2 Qg5 36.Kh1–/+) 34.Bc3 Bg5 (34...Bc7 35.Qd3 Qa2 36.Ne2–/+) 35.Qd3 Qa2 36.Ne2 Bh4 37.Kg1 Bf6 38.Nc1 Qa4 39.Ne2 Qa7 40.Qc2 g6 41.Kg2 Bg7 42.Qb3 Qa8 43.Nf4 Qa4 44.Qb1 Qa3 45.Qa1 Qb3 46.Qa8 Bf8 47.Ne2?? Qc2–+ 48.Qc6 Qe2 49.Kg3 h5 50.h4 Qf1 51.Qb5 g5! 52.hg5 h4! 53.Kf4 Qf2 0–1. Wall,Bill – Iceman5, internet, 2003.

5.a3 Qb6 6.cd5 cd5 7.Nc3 a5 8.b5 Nd7 9.Nf3 Nc5 10.d4 Ne4 11.Ne4 Be4 12.Bd3 Bd3 13.Qd3 Nf6 14.0–0 Bd6 15.Rfc1 0–0 16.h3 (16.a4 Ne4=) 16...Ne4 17.Nd2 (better is 17.a4=) 17...Qc7?? (better is 17...Nd2 18.Qd2 Qb5–/+) 18.Rc7+– Bc7 19.Ne4 de4 20.Qe4 Rad8 (20...Rab8 21.d5 Rfe8 22.Qg4+–) 21.a4 (better is 21.Qb7 Rd7 22.Qc6 Rfd8+–) 21...Rd5 22.Rc1 Bb8 23.Ba3 Re8 24.Rc5 Rd7 25.Bb2 Bd6 26.Rc4 Bb4 27.Bc3 Bc3 28.Rc3 e5 (28...h6 29.b6 f5 30.Qe5+–) 29.de5 (29.Qe5 Kf8 30.Qf5 Rde7+–) 29...Rde7 (29...g6 30.b6 Ree7 31.Rc8 Kg7 32.Qf4+–) 30.f4 (30.b6!? h6+–) 30...f6 31.Rc5 (31.b6 fe5 32.Rc7 Kf8+–) 31...b6 (31...fe5 32.Re5 Re5 33.fe5+–) 32.Rd5 (better is 32.Qc4!? Kf8 33.ef6 gf6+–) 32...fe5 33.Re5 Re5 34.fe5 Rc8 35.e6 Kf8 36.e7 (36.Qb7 Rc1 37.Kf2 Rc2 38.Kf3 Rf2 39.Kf2 Ke8 40.Qd7 Kf8 41.Qd8) 36...Ke8+– 37.Qe6 (37.Qh7 Rc1 38.Kf2 Rc5+–) 37...Rc7 38.Qb6 Re7 39.Qc6 Kf7 40.e4 g6 41.b6 1–0. Fournier,Frederic (1895) – partialles (1850), Active, 2004.

5.a3 dc4 6.Bc4 b5 7.Be2 =+.

5.a3 f6 6.d4 Bd6 7.Nc3 (7.Nf3 dc4 8.Bc4 b5=) 7...Ne7 8.Nf3 Nd7 9.Be2 (9.Nh4 0–0=) 9...h6 (9...dc4 10.e4 Bg4 11.Bc4=) 10.0–0 g5 (10...0–0 11.c5 Bc7 12.Nh4=) 11.h3 (11.Rc1 Qb8+=) 11...Rc8 (11...g4 12.hg4 Bg4 13.cd5 Nd5 14.Qd3=) 12.Re1 (12.c5 Bc7+=) 12...Bb8 (12...g4 13.hg4 Bg4 14.Nd2 Be2 15.Qe2+=) 13.Nd2 Qc7 14.Rc1?? (better is 14.Nf1+=) 14…Qh2 (14...Qh2 15.Kf1 Qh1) 0–1. wlittle (2155) – bienopia (2160), net–chess.com, 2004.

5.a4 a5 6.b5 c5 7.Nf3 b6 8.Be2 Nd7 9.0–0 Ngf6 10.d4 Bd6 11.Nbd2 0–0 12.cd5 ed5 (12...Nd5? 13.e4 Bg6 14.ed5 ed5 15.dc5 Nc5 16.Ne5+–) 13.Rc1 (13.dc5!? bc5 14.Rc1=) 13...c4=+ 14.Ne5 Re8 15.f4 Ne4 16.Bf3 (better 16.Bh5 Rf8 17.Ne4 Be4 18.Bf3–/+) 16...f6?? (better 16...Ndf6!?–/+) 17.Nc6 (better 17.Be4 de4 18.Ndc4+–) 17...Qc7= 18.Be4 Be4 19.Bc3 (19.Ne4 Re4 20.Qh5 f5=) 19...Bd3 (19...Ba3 20.Ra1 Qd6 21.Qh5–/+) 20.Re1 (20.Qf3!? Be4 21.Ne4 Re4 22.Qh5+=) 20...Nf8 21.Qf3 Ng6?? (better 21...Be4 22.Ne4 Re4=+) 22.Qd5+– Kh8 23.Qf3 (better 23.Nc4 Bc4 24.Qc4+–) 23...Rac8+– 24.g3 Ba3 (24...Ne7 25.d5+=) 25.Ra1+– Bd6 26.e4 f5 (26...Qd7 27.d5+–) 27.e5 Bb4? (27...Bf8 28.d5 Bc5 29.Kg2+–) 28.Rec1 (28.Bb4 ab4 29.Nb4 Rcd8+–) 28...Ne7 (better 28...Bf8+–) 29.d5?? (better 29.Bb4 Nc6 30.bc6 (30.Qc6?! Qd8 31.Bd6 Rc6 32.bc6 Qc8+–) 30...ab4 31.Nc4+–) 29...Bc5+– 30.Kg2 Nc6 (30...Qd7!? 31.Ne7 Qe7+=) 31.bc6+– (31.dc6?! Qe7+=) 31...Rcd8 (31...Red8 32.Re1+–) 32.Re1 Qf7 33.d6 Qg6?? (better 33...Qe6+–) 34.c7 Rd7 (34...Rc8 35.Qd5+–) 35.Rad1 (better 35.Qc6 Rc7 36.Qc7+–) 35...Rc8 36.Nf1 (36.Qd5 Bc2 37.Nc4 Bd1 38.Rd1 Qh5+–) 36...Bd6? (better 36...Be4 37.Re4 fe4+–) 37.ed6 Rd6?? (37...Qd6 38.Be5 Qf8 39.Qe3+–) 38.Qe3 (better 38.Qb7 Rdd8 39.cd8R Rd8 40.Re6 Qg4 41.h3 Rg8 42.hg4 Bf1 43.Kf1 fg4 44.Rd8 Rd8 45.Qg7) 38...Rd7 39.Qe6?? (39.Be5 Qc6 40.Kg1 Kg8+–) 39...Rdc7?? (better 39...Bf1 40.Kf1 Qe6 41.Re6 Rd1 42.Ke2 Rd7=+) 40.Qg6+– hg6 41.Kf2 Kh7 42.Ne3 (42.Rd2 Rb7+–) 42...Rd7 (42...Rb7 43.Rd2 Rc6 44.Rc1+–) 43.g4 Rd5?? (better 43...Rb7+–) 44.Nd5 1–0. BeepBeepImAJeep (2730) – Mescalero81 (2390), lichess.org, 2020.

5.a4 Bb4?? 6.Bg7 dc4 7.Bh8 +–.

5.a4 Bb4?? 6.Bg7 Bd2 7.Nd2 dc4 8.Bh8 +–.

5.a4 dc4 6.Bc4 Nf6 7.b5 c5 8.Nf3 Nbd7 9.0–0 Bd6 10.d4 (10.a5 0–0=) 10...Rc8 11.Nbd2 cd4 12.Nd4 Bg6 13.Be2 (13.a5 Ne5 14.Be2 0–0=) 13...0–0 (13...e5 14.N4f3 Bc2 15.Qc1=) 14.N2f3 (14.Nc4 Bb4=) 14...Bb8 (14...Qe7 15.Bd3=+) 15.Rc1= Rc1 16.Qc1 Nb6 17.a5 Nbd5 18.a6 ba6 (18...e5 19.Nb3 e4 20.Ne5 Be5 21.Be5 ba6 22.ba6+=) 19.Nc6+= Qb6 (19...Qd7 20.Nfe5 Qc7 21.Nb8 Qb8 22.Ng6 fg6 23.ba6+–) 20.Nb8 (20.Bd4 Qb7 21.ba6 Qa8+–) 20...Rb8= 21.Bd4 Qb7 (21...Qd8 22.ba6 Rc8 23.Qa1+=) 22.ba6 Qe7 (22...Qa8+=) 23.Qc5 (23.Ne5 Nb4+–) 23...Ra8 (better 23...Qc5!? 24.Bc5 Nc3=) 24.Rc1 h6? (better 24...Qc5 25.Rc5 Nd7+–) 25.Qe7+– Ne7 26.Rc7 Nfd5 (26...Rc8 27.Re7 (worse 27.Ra7 Rc1 28.Bf1 Bd3=+) 27...Rc1 28.Bf1+=) 27.Ra7 Ra7 (27...Rc8 28.Ne5 Nf5 29.h3+–) 28.Ba7 Nc7 29.Bb6 Ned5 30.Bc7 Nc7 31.Nd2 e5 32.a7 Bf5 33.Bf3 e4 (33...Kf8+–) 34.Ne4 (worse 34.Be4 Be4 35.Ne4 Kf8+–) 34...Bc8 (34...Be4 35.Be4 Kf8+–) 35.Nd6 (35.Nd6 Bd7 36.Bd5+–) 1–0. BeepBeepImAJeep (2730) – erindreki (2430), lichess.org, 2015.

5.a4 dc4 6.Bc4 Bg6 7.b5 Nf6 8.Nf3 Bc5 (8...cb5 9.Bb5 Nbd7 10.Bf6 gf6 11.0–0=) 9.0–0 Nbd7 (9...Bd6 10.d3=) 10.d4 Bb6 11.Nbd2 Bc7 12.Rc1 Rc8 (12...cb5 13.Bb5 0–0 14.Ba3+=) 13.Qb3 (13.bc6 bc6 14.Ba3 Rb8+–) 13...Bb8 14.Ba3 Qc7 (better 14...Nd5!?+–) 15.Be6+– Kd8 (15...Rd8 16.Rfd1+–) 16.Bf7 (16.bc6 bc6 17.Bf7 Nc5 18.Bc5 Bf7+–) 16...Bf7 (16...Nc5 17.Bc5 Bf7+–) 17.Qf7 Rf8 (17...Re8 18.bc6 bc6 19.Qg7 Qa5+–) 18.Be7 1–0. BeepBeepImAJeep (2680) – petersonpimentel (1810), lichess.org, 2016.

5.a4 Nd7 6.b5 Ngf6 7.Nf3 Bc5 8.Be2 0–0 9.0–0 Re8 10.d4 Bd6 11.Nbd2 e5 (11...Rc8 12.Nh4=) 12.de5 (12.cd5 cd5 (12...Nd5? 13.e4+–) 13.de5 Ne5 14.Be5 Be5 15.Ne5 Re5+=) 12...Ne5= 13.Ne5 Be5 14.Be5 Re5 15.Nf3 Re7 16.Nd4 Bd7 17.bc6 bc6 18.cd5 Nd5 19.Rc1 Qe8 20.Bf3 Rd8 (20...Rb8 21.Qd2+=) 21.Qc2 (21.Rc5+=) 21...Nf6 (21...Re5 22.Qd2+=) 22.Bc6 (22.Nc6 Bc6 23.Bc6 Qf8+–) 22...Bc6 23.Qc6 (worse 23.Nc6 Rc7 24.Nd8 Rc2 25.Rc2 Qd8–/+) 23...Qf8 (23...Re3 24.fe3 Qe3 25.Kh1 Qd4 26.Qa6+–) 24.Qa6 Red7 25.h3 h6 (25...Nd5 26.Rfd1 Nf6 27.Qa5+–) 26.Nc6 Re8 (26...Qd6 27.Qe2 Re8 28.Rfd1+–) 27.Rfd1 (27.Na7 Ra8 28.Rc8 Rc8 29.Nc8 Qc5+–) 27...Rc7 (27...Rd1 28.Rd1 Qc5 29.Qb5+– (29.Na7 Ra8–/+)) 28.Nd4 (28.Na7 Rc5+–) 28...Rec8 (28...Rd7!?+–) 29.Rc7+– Rc7 30.Nb5 Re7 31.Qd6 (31.Qa5!? Re8+–) 31...Ne8 (31...Ne4 32.Qb4 a6 33.Nd4+–) 32.Qc5 Nf6 (32...a6 33.Nd4 Rc7 34.Qb6+–) 33.Rc1 (better 33.Na7 Ne4 34.Qd4+–) 33...Qa8?? (33...Ne4 34.Qf5 g6 35.Qd5+–) 34.Qc8 (better 34.Qe7 Qd5 35.Qa7+–) 34...Qc8 (34...Re8 35.Qa6+–) 35.Rc8 Kh7 36.Ra8 Nd5 (36...Kg6 37.Ra7 Ra7 38.Na7+–) 37.Ra7 Ra7 38.Na7 Nc3 (38...Nb4 39.a5+–) 39.a5 Ne2 (39...Nd5 40.Nb5+–) 40.Kf1 Nc3 41.Nc6 Nb5 42.a6 Nc7 43.a7 Na8 44.Nb4 f6 (44...Kg6 45.Ke2 Kf5 46.Kd3+–) 45.Nd5 (45.Ke2 h5+–) 45...Kg6 46.e4 Kf7 47.f3 Ke6 48.Ke2 Kd6 49.Kd3 (49.Ke3 h5+–) 49...Ke5 (49...Kc6 50.f4 Kc5 51.g4+–) 50.Ke3 (50.f4!? Kd6 51.Kd4 Kc6+–) 50...Kd6 51.f4 (better 51.Kf4 Ke6 52.h4+–) 51...Nb6 (51...f5+–) 52.Kd4 (52.Nb6 Kc7 53.a8Q Kb6 54.e5 fe5 55.fe5+–) 52...Na8 53.e5 Kd7 (53...fe5 54.fe5 Kc6+–) 54.Kc5 fe5 55.Nb6 Ke6 (55...Nb6 56.Kb6 ef4 57.a8Q+–) 56.Na8 ef4 57.Nc7 Kf5 58.a8Q f3 (58...h5 59.Qd5 Kg6 60.Qe6 Kh7 61.Qf7 h4 62.Ne6 Kh6 63.Qg7 Kh5 64.Nf4) 59.Qc8 (59.Qf3 Kg5 60.Ne6 Kg6 61.Nf8 Kg5 62.g3 g6 63.Ne6) 59...Kf4+– 60.Qg4 (60.Qg4 Ke3 61.Qf3 Kd2 62.Ne6 g5 63.Nd4 Kc1 64.Qe3 Kd1 65.Qd3 Ke1 66.Qe2) 1–0. BeepBeepImAJeep (2630) – Manitou (1815), lichess.org, 2016.

5.a4 Nd7 6.b5 Ngf6 7.Nf3 Bd6 8.Be2 Bc7 (8...cb5 9.cd5 Nd5 10.ab5=+) 9.0–0 (9.bc6 bc6 10.Nd4 dc4 11.Nf5 ef5 12.Bc4 Rb8=) 9...0–0 (9...dc4 10.Bc4 cb5 11.ab5=) 10.d4 (10.Nd4 Bb1 11.Rb1 c5=) 10...Re8 11.Nbd2 Be4 (11...cb5 12.ab5 dc4 13.Nc4=) 12.Ne4+= de4 13.Nd2 e5 14.de5 (14.c5 ed4 15.Bd4 Qe7+=) 14...Ne5 (14...Be5 15.Be5 Re5 16.Qc2=) 15.Nb3 Nd3 (15...Qb8 16.Nc5=) 16.Bd4 (16.Bd3 ed3 17.Bf6=) 16...Be5 (better 16...c5!? 17.Bc3 Qd6=) 17.Bd3+– Bd4 18.ed4 ed3 19.Qd3 Qd7 20.Rae1 Rad8 21.h3 h6 22.Re3 Re3 23.fe3 Qe6 (23...Qe7 24.Rf5+–) 24.Nc5 Qe7 25.Qd2?? (better 25.bc6 bc6 26.Rf5+–) 25...Qc5!–+ 26.Qd3 (26.dc5 Ne4 Double attack (26...Rd2 Pinning; 26...Rd2 Deflection; 26...Ne4 Decoy)) 26...Qd6 (26...Qb4 27.Ra1–+) 27.Rf4 (27.bc6 Qc6 28.Rb1 b6–+) 27...Qe6 (27...Qb4 28.bc6 bc6 29.Rf1–+) 28.Kh2 Qd6 29.c5?? (29.Kg1 Qb4 30.bc6 bc6 31.Rf1–+) 29...Qc7 (better 29...Qc5! 30.Rf1–+) 30.Kg1 Re8 31.Qd2 (31.Rf3 Qa5 32.Qb3 a6–+) 31...Qe7 32.Rf3 Ne4 (32...Nd5 33.Kf2–+) 33.Qd3 (33.Qa5 Ng5 34.Rg3 h5–+) 33...Qd7 (better 33...Ng5 34.Rg3 Qc7–+) 34.Qf1 (34.bc6 bc6 35.Qe2–+) 34...Nd2 35.Qf2 Nf3 36.Qf3 Qe6 (36...cb5 37.ab5 Qb5 38.Kf2–+) 37.Kf2 Qe4 (37...Qa2 38.Qe2 Qa4 39.bc6 Qc6 40.Qg4–+) 38.b6 (38.Qe4 Re4 39.g4–+) 38...Qf3 39.gf3 f6 (better 39...ab6 40.cb6 Ra8 41.e4–+) 40.a5 Re6 (better 40...ab6 41.ab6 f5–+) 41.a6+– ab6 (41...ba6 42.b7 Re8+–) 42.a7 (better 42.ab7 Kf7 43.b8Q bc5 44.Qa7 Ke8 45.Qg7 cd4 46.ed4+–) 42...Re8–+ 43.cb6 Ra8 44.e4 Kf7 45.Ke2 Ke6 46.Kd3 f5 47.Kc4 fe4 48.fe4 g5 49.Kc5 1–0. BeepBeepImAJeep (2620) – Manitou (1820), lichess.org, 2017.

5.a4 Nd7 6.b5 Ngf6 7.Nf3 Bg6 8.Be2 Bd6 9.0–0 e5 (9...dc4 10.bc6 bc6 11.Na3=) 10.d3 (10.c5 Bc7=) 10...Qe7 11.Nc3 (11.d4 e4 12.Nfd2 0–0=) 11...0–0 (11...dc4 12.dc4 Nc5 13.Nh4=+) 12.Rc1 Rfd8 13.bc6 bc6 14.cd5 cd5 (14...Nd5 15.Ne4 Be4 16.de4=) 15.Nb5 a6 16.Nd6 Qd6 17.Qb3 (17.d4 e4 18.Ne5 Rdb8+=) 17...Rab8 18.Qa2 Qe6 (18...Bh5 19.Ba3 Qb6 20.Qd2=) 19.Qa1 (19.d4 e4 20.Ng5 Qb6=) 19...Re8 (19...Bh5 20.Rc3=) 20.Rc7 (20.d4 Qb6 21.Bc3 e4=) 20...Bh5 21.Rfc1 Rb3 22.R7c6 Qf5 23.Ra6 Bf3 24.Bf3 Qd3 25.Rac6 e4?? (25...Qf5 26.a5+=) 26.Bd1?? (better 26.Rd1 ef3 A) 27.Bf6?? Qg6 28.g3 Qf5–+ (28...gf6?! 29.Qd4–+); B) 27.Rd3 Rd3 28.Bf6 Nf6 29.gf3+–) 26...Rbb8+– 27.Bc2 (27.Bd4 Qd2 28.Bc3 Qd3+–) 27...Qe2+= 28.Bd4 Rec8? (28...Ng4 29.Rf1 Nge5 30.Rc7+=) 29.Rc8?? (29.Bd3 ed3 30.Rc8 Rc8 31.Rc8 Nf8 32.Qf1+– (32.Bf6 d2 33.Rc1 dc1R 34.Qc1 gf6–/+)) 29...Rc8+= 30.Bb3 Rc1 31.Qc1 h5 32.Qd1 (32.h3 h4+–) 32...Qa6 33.h3 (33.Qd2 Qd6+–) 33...h4 (33...Qa5 34.Qc1+–) 34.Qa1 Qa5 35.Bc3 (35.Qc3 Qc3 36.Bc3 Nc5 37.Bf6 Nb3 38.Bh4 Kf8+–) 35...Qb6+= 36.a5?? (better 36.Qd1+=) 36...Qb3–+ 37.a6 Nb6?? (37...Qb8!?–+) 38.a7 (better 38.Bf6!? gf6 39.Qf6+=) 38...Nfd7=+ 39.a8Q (39.Bg7!? Na8 40.Bd4=+) 39...Na8–/+ 40.Qa8 Kh7 41.Qa1 f6 42.Bd4 Qc4 (42...Kg6 43.Qa6 Kf7 44.Qe2 Qb1 45.Kh2 Qb8 46.Kg1–/+) 43.Qf1? (better 43.Qd1=+) 43...Qf1–+ 44.Kf1 Kg6 45.g3 hg3 46.fg3 Kf5 47.Kg2 g5 48.g4 Kg6 49.Kf2 f5 50.Kg3 Nf6 51.gf5 Kf5 52.Bc5 Nh5 53.Kf2 g4 54.hg4 Kg4 55.Bd4 Ng7?? (55...Ng3 56.Bc5–+) 56.Bc5?? (better 56.Bg7 Kf5 57.Ke2+–) 56...Nf5–+ 57.Bb6 Kh3 58.Bc5 Nh6 59.Ba7 Ng4 60.Ke2 Kg2 61.Bb8 Nh2 62.Bh2?? (better 62.Be5–+) 62...Kh2 63.Kd2 Kh3 64.Kc3 Kg3 65.Kd4 Kf3 66.Kd5 Ke3 67.Ke5 Kf3 68.Kf5 e3 69.Ke5 e2 70.Kf5 (70.Kd5–+) 70...e1Q 71.Kf6 Qe2 72.Kf7 Qe3 73.Kf8 (73.Kg7 Qe7 74.Kg6 Kg4 75.Kh6 Kf5 76.Kh5 Qg5) 73...Qe4 (73...Kf4 74.Kg7 Kf5 75.Kg8 Qe7 76.Kh8 Kf6 77.Kg8 Qg7) 74.Kf7 (74.Kg7 Qe7 75.Kh6 Qf7 76.Kg5 Ke4 77.Kh6 Qg8 78.Kh5 Kf5 79.Kh4 Qg4) 74...Qf4 (74...Kf4 75.Kf6 Qe5 76.Kg6 Qf5 77.Kg7 Kg5 78.Kg8 Kg6 79.Kh8 Qc8) 75.Kg8 (75.Kg7 Kg4 76.Kh7 Qc7 77.Kg6 Qc6 78.Kg7 Kf5 79.Kg8 Qd7 80.Kf8 Kf6 81.Kg8 Qg7) 75...Ke4 76.Kg7 Qe5 77.Kg8 Qc7 (77...Qc7 78.Kf8 Ke5 79.Ke8 Ke6 80.Kf8 Qf7; 77...Qe7 78.Kh8 Ke5 79.Kg8 Kf6 80.Kh8 Qg7) 0–1. BeepBeepImAJeep (2530) – opperwezen (2500), lichess.org, 2017.

5.a4 f6 6.b5 Bc5 7.Nf3 Bb4 8.Be2 Ba5 (8...Ne7 9.Nd4=) 9.0–0 Bg6 10.Nc3 Ne7 11.d4 Nd7 12.Qb3 Rb8 13.Ba3 0–0 (13...dc4 14.Bc4 Nd5 15.Nd5 cd5 16.Be2+=) 14.Rac1 Re8 15.Bd6 Bc7 (better 15...Rc8!?+=) 16.Bc7+– Qc7 17.cd5 ed5 18.Nd5! Nd5 (18...cd5 19.Rc7 Pinning (19.Rc7 Deflection; 19.Rc7 Clearance); 18...Nd5 19.Qd5) 19.Qd5! Kh8 (19...cd5 20.Rc7 Pinning (20.Rc7 Deflection; 20.Rc7 Remove defender)) 20.bc6 bc6 (20...Nb6 21.Qb5+–) 21.Rc6 (21.Qc6 Qc6 22.Rc6 Rec8+–) 21...Qd8 22.Rd6 (22.Qd6 Nb6 23.a5 Na8+–) 22...Re7 (22...Be4 23.Qh5+– (23.Rd7?! Bd5 24.Rd8 Red8+=)) 23.Bb5 (better 23.Rc1+–) 23...Qg8?? (23...Be4 24.Qh5 Qc7+–) 24.Qg8 Kg8 25.Rd7 Rd7 26.Bd7 Rb7 (26...Kf8 27.Rc1+–) 27.Bc6 Rc7 (27...Rb2 28.d5+–) 28.d5 Bf7 (28...Rc8 29.Nd4+–) 29.Nd4 Kf8 (29...Rc8 30.Rb1+–) 30.Nb5 Be8 (30...Rc8 31.Na7 Rb8+–) 31.Nc7 Bc6 32.dc6 Ke7 33.Nb5 Kd8 34.c7 Kc8 (34...Kd7 35.Rd1 Ke7 36.c8Q f5 37.Qf5 a6 38.Rd7 Ke8 39.Nd6) 35.Rd1 a6 (35...Kb7 36.Rd8 Kc6 37.c8Q Kb6 38.Qc7 Ka6 39.Qa7) 36.Rd8 Kb7 37.c8Q Kb6 38.Qc7 1–0. BeepBeepImAJeep (2560) – Siabal (1620), lichess.org, 2019.

5.Qb3 Be7?? (5...Nf6 A) 6.Nc3 dc4 7.Bc4 Bd6 8.f3 b5 9.Be2 a5+=; B) 6.Bd4 dc4 7.Bc4 Bd6 8.Nf3 Be4 9.a4 Nbd7+=; C) 6.Nf3+= Be4 (6...dc4 7.Bc4 b5 8.Be2 a5 9.ba5 Nbd7=; 6...Bd6 7.c5 Be7 8.Be2 b6 9.0–0 bc5=; 6...Be7 7.cd5 ed5 8.Be2 Qb6 9.a3 c5=; 6...Nbd7 7.a3 Be4 8.d4 Bf3 9.gf3 a5+=) 7.Nc3 Bf3 8.gf3 Nbd7 9.cd5 cd5+=; D) 6.b5 Nbd7 7.d4 a6 8.bc6 bc6 9.c5 Ne4–/+; E) 6.d3 dc4 7.dc4 a5 8.ba5 Nbd7 9.Nd2 Qa5+=; F) 6.Be2 dc4 7.Qc4 b5 8.Qb3 Nd5 9.a3 a5=; 5...dc4 6.Bc4 Nf6 (6...Qg5 7.Bf1 Qe7 8.Nf3 Nf6 9.a3 Nbd7=) 7.Nf3 b5 8.Be2 a5 9.ba5 Nbd7=) 6.Bd3?? (better is 6.Bg7 dc4 7.Bc4+–) 6...Bd3+= 7.Qd3 Nf6 8.Nf3 (8.a3 a5+=) 8...0–0 (8...Bb4 9.cd5 Qd5 10.Bd4–/+) 9.0–0 (9.a3 c5 10.Bc3 Nbd7+=) 9...Ne4 (better is 9...Bb4!? 10.Qb3 Na6–/+) 10.c5 Na6 11.a3 b6?? 12.Qa6+– bc5 13.d3 Bf6 14.Bf6 Qf6 15.de4 Qa1 16.bc5 Rab8 17.Nbd2 Qa2 18.Qa5 Rb5 19.Qa7 Rfb8 20.ed5 Qd5 21.Nd4 R5b7 22.Qa4 Rc8 23.Qa6 Rbc7 24.Rc1 f5 25.Qc4 Rd7 26.Qd5 Rd5 27.a4 f4 28.a5 e5 29.N4b3 fe3 30.fe3 Kf7 31.a6 Ra8 32.Ra1 Rd7 33.Nc4 Rd3 34.Ne5 (34.Ne5 Ke6 35.Nd3+–) 1–0. Trkn – Marcus, itsyourturn.com, 2000.

5.b5 Nf6 6.a4 a6 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 Be7 10.Nc3 (10.cd5 cd5 11.Be2 0–0=) 10...0–0 11.Be2 Nbd7 (11...cb5 12.cb5 Qd6 13.Nh4=) 12.0–0 (12.bc6 bc6 13.Nd4 Qc7+=) 12...Qa5 (12...dc4!? 13.bc6 bc6=) 13.Nd4+= cb5 (13...Bd6 14.bc6 bc6 15.cd5 Nd5 16.Nf5 ef5 17.Nd5 cd5 18.Qc2+=) 14.Nd5+– Nd5 15.cd5 b4 16.de6 Be6 17.Ne6 fe6 18.Bc4 Qb6 (better 18...Qf5!?+–) 19.Qg4+– Nf6 20.Qe6 Qe6 21.Be6 Kh8 22.f3 Rd8 23.d4 Rd6 (23...Nd5 24.Kf2+–) 24.Bb3 Nd7 (24...Nd5 25.Kf2+–) 25.e4 Ra6 26.Bb2 h6 (26...h5 27.e5+–) 27.e5 Kh7 (27...Nb6 28.Ra1+–) 28.Rc1 Nb8 (28...Rc6 29.Rd1+–) 29.Rc8 Nc6 30.d5 Na5 (30...Kg6 31.Bc4 Rb6+–) 31.Bc2 g6 (31...Rg6 32.Re8 Bc5 33.Kh1 b3+–) 32.Rc7 (32.Rc7 Kg8 33.Re7+–; 32.e6 Bc5 33.Kf1 Ra8 34.Ra8 Bf8 35.Rf8 Nc4 36.Rh8) 1–0. DEFFM – Sluggy, freechess.org, 2018.

5.b5 Nf6 6.Qb3 Nbd7 7.d4 Be7 8.Nf3 0–0 9.a4 c5 10.Nbd2 cd4 (10...Rc8 11.Bd3 cd4 12.Bd4=+) 11.Nd4 (11.Bd4 Qa5=+) 11...Nc5 12.Qc3 (12.Qd1 Be4=+) 12...Nce4 (12...Bg6 13.N4f3=+) 13.Ne4 Be4 14.f3 Bg6 15.Bd3 (15.Rc1 Rc8=+) 15...Bd3 (15...Rc8 16.Bg6 hg6 17.0–0–/+) 16.Qd3=+ dc4 17.Qc4 Rc8 18.Qb3 (18.Qe2 e5 19.Nf5 Bb4 20.Kf2 Qd7=+) 18...Qa5 19.Ke2 Nd5 20.Rhc1 Bg5 (20...Rfd8 21.f4=+) 21.f4 Bf6 22.Rc4 (22.f5 Rce8=+) 22...Rfd8 23.Rd1 (23.Rc8 Rc8 24.f5 Nc3 25.Kf1 Ne4–/+) 23...Rc4 24.Qc4 Nb6 25.Qb3 (25.Qc7 Qa4 26.Ra1 Qb4–/+) 25...Qa4–/+ (worse 25...Na4 26.Ra1 Nc5 27.Ra5 Nb3 28.Nb3 Bb2 29.Ra7+–) 26.Qa4 Na4 27.Ba1 Rc8 (27...Nc5 28.Rc1 Be7 29.Bb2–/+) 28.Kd3 (28.g4 a6–/+) 28...Nc5 29.Kc4 (29.Ke2 Ne4–/+) 29...Ne4–+ 30.Kb3 e5 (30...Nf2 31.Re1–/+) 31.Nf3 (31.Nf5!?=) 31...ef4 32.Bf6 Nf6 33.ef4 b6 (33...a6 34.b6–/+) 34.Ne5=+ h5 35.Nc6 (35.g3 Ne4=+) 35...Re8 (35...Rc7 36.Rd8 Kh7 37.Nd4=+) 36.Rd8 (36.Na7 Re2=) 36...Rd8=+ 37.Nd8 Nd5 (37...Ng4 38.Nc6 Ne3 39.g3=) 38.Nc6 (38.g3 Ne3=+) 38...Nf4=+ 39.g3 Ne6 (39...Nd5 40.Kc4 Ne3 41.Kd3–/+) 40.Na7=+ Nc7 41.Kc4 f6 (41...f5 42.Nc8 Na8 43.Kd5+–) 42.Nc8+– Kf7 43.Nb6 g5 (43...Ke7 44.Kc5+–) 44.Nc8 f5 45.b6 Na6 46.Kb5 (better 46.Na7!?+–) 46...Nb8+= 47.b7 (47.Nd6 Ke6 48.Nc4 f4=) 47...f4 48.gf4 (48.Nd6 Ke6 49.Ne4 Kf5 50.gf4 gf4+=) 48...gf4 49.Nd6 (49.Kc4 Ke6+=) 49...Ke6= 50.Ne4 Ke5 51.Nc5 f3 (51...Kd5 52.Kb6 f3 53.Nb3=) 52.Kb6 (52.Kc4 Kd6=) 52…Kd5 ½–½. jaddwarrior (2020) – sparrow213 (1855), ChessWorld.net, 2015.

5.b5 Nf6 6.Nf3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.b5).

5.c5 a5 6.a3 ab4 7.ab4 Ra1 8.Ba1 Nd7 9.h4 (9.Nf3 b6 10.b5 A) 10...Bc5?? 11.Bg7 (11.bc6?! Ndf6+=) 11...Ne7 12.Bh8+–; B) 10...bc5 11.bc6 Ndf6 12.Bb5+=; C) 10...Qa8 11.bc6 Qa1 12.cd7 Kd8=+) 9...Ngf6 10.Be2 b6 11.b5 Nc5 12.bc6 Qc7 13.Bf6 gf6 14.Nc3 Bd3 (14...Qc6?? 15.Bb5 Nd3 16.Kf1 Qb5 17.Nb5+–) 15.Bd3 Nd3 16.Ke2 Ne5 17.f4 Nc6 18.Qa4 Kd8 (18...Rg8 19.Rh2–/+) 19.Nb5 Qb7 20.Nf3 Rg8 21.Kf2 Nb4 22.Rb1 Nd3 23.Kf1 Qc6 (better is 23...e5!?–/+) 24.Nfd4 Qb7 25.Na7 (25.Nf3 e5–/+) 25...Nc5=+ 26.Ndc6 (26.Qb5 Ne4 27.Nac6 Kc7=) 26...Kc7 (26...Ke8 27.Qb5 Nd7 28.Qd3–/+) 27.Qa1 (27.Qd4 Qa6 28.Rb5 Qa4 29.Qa4 Na4–/+) 27...Bg7 28.d4 Ne4 29.Qa2? Nc3?? 30.Qc2 Qa6 31.Kg1?? Qc4?? 32.Qh7+– Ne2 33.Kf2 Nf4?! 34.ef4 Qc2 35.Qc2 (35...Kd6 36.Qh7+–) 1–0. Plock,Joerg – Radonz, Stassfurt, 1991.

5.c5 Nd7 6.Nf3 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.c5 Nbd7).

5.d4 Bb4 6.Nc3 Nf6 7.a3 Bc3 (7...Ba5 8.Qb3–/+) 8.Bc3 0–0 9.Nf3 a5 10.c5 Ne4 11.Qb3 Nd7 12.Bb2 (12.Rc1 Rb8–/+) 12...Qc7 (12...Rb8 13.Qd1–+) 13.Be2 (13.Nh4 a4 14.Qb4 Rfb8+=) 13...b6 14.cb6 Nb6 (worse is 14...Qb6 15.Qb6 Nb6 16.Rc1+=) 15.0–0 (15.Rc1!? Rfb8 16.Qa2–/+) 15...Rab8–+ 16.Qd1 g5 (16...Na4 17.Bc1–+) 17.h4 (17.Rc1 f6+=) 17...Qe7 (better is 17...Na4! 18.Bc1 Nac3–/+) 18.Ng5 (18.hg5 Nc4 19.Bc4 Rb2+=) 18…Ng5–/+ (18...Ng5 19.hg5 Qg5–/+) 0–1. lucasfisch (1800) – luisgustagomes (2625), net–chess.com, 2013.

5.cd5 Bb4 6.Bg7 Bd2 7.Nd2 +–.

5.cd5 cd5 6.a3 a6 7.Nf3 Nc6 8.Be2 Nf6 9.0–0 Be7 10.h3 0–0 11.d4 h6 12.Bd3 Bd3 13.Qd3 Qd7 14.Nbd2 Rfc8 15.Rac1 b5 16.Rc2 Bd6 17.Rfc1 Qe7?? (better is 17...Qe8=) 18.Rc6+– Rc6 19.Rc6 a5 (19...Qd7 20.Qc2+–) 20.ba5 Ra5 21.Qc3 (better is 21.Rc8 Ne8 22.Bc3 b4 23.Bb4 Bb4 24.ab4 Ra1 25.Kh2 Ra2+–) 21...Ba3 (21...Ra8+–) 22.Qa5 (22.Qa5 Bb2 23.Qb5+–) 1–0. Fournier,Frederic (2075) – carocalle (1745), Active, 2005.

5.cd5 cd5 6.Nf3 Nd7 7.a3 Ngf6 8.Be2 a5 9.ba5 Qa5 10.0–0 Be7 11.d3 0–0 12.Nc3 Rfc8 13.Qd2 e5 14.Rfe1 Nc5 15.Qd1 e4 16.Nd4 Bd7 17.de4 Na4 18.Na4 Ba4 19.Qb1 de4 (worse is 19...Ne4 20.Bd3+=) 20.f3 Qg5 21.f4 ½–½. Van Rooijen,Peter (1690) – Sijses,Wim, IECG, 2004.

5.cd5 cd5 6.Nf3 Nd7 7.Be2 Ngf6 8.a3 Be7 9.0–0 0–0 10.d3 Rc8 11.Nbd2 h6 12.Qb3 a6 13.Rfc1 b5 14.Rc8 Qc8 15.Rc1 Qb8 16.Nd4 Bd6 17.g3 (17.Nf5!? ef5 18.g3+/–) 17...Bg6= 18.Nc6 Qb7 19.Nf3 Bh7 (19...Rc8 20.Qc2 Rc7 21.Nfd4+=) 20.Nfd4 (20.Qc2 Nb6+=) 20...Rc8 21.Na5 Qa8 22.Rc8 Qc8 23.Qc3 Qc3 24.Bc3 Ne5 25.Nb7 Be7 26.Nc5 Bc5= 27.bc5 Bd3 28.c6 Ne8+= 29.Bd3 Nd3+= 30.Ba5 Nd6 31.c7 Ne5 32.f4 Nec4 33.Bb4 Nc8 34.Nc6 a5 35.Na5 Na5 36.Ba5 Kf8 37.Kf2 Ke8 38.Ke2 Kd7 39.Kd3 Kc6 40.Kd4 f6 41.g4= g6 42.h4 g5 43.hg5 hg5 44.fg5 e5 45.Kd3 fg5 46.Bc3 e4 47.Kc2 Kc7= 48.Bf6 Kd6 49.Bg5 Ke6 50.Bf4 Ne7= 51.Kb3 Ng6 52.Bb8 Ne5 53.Be5+/– Ke5 54.Kb4?? d4–+ 55.ed4 Kd4 56.g5 e3 57.g6 e2 58.g7 e1Q 59.Kb5 Qe5 60.Kb6 Qg7 61.a4 Qd7 (61...Qd7 62.a5 Kd5 63.Ka6 Kd6 64.Kb6 Qc6 65.Ka7 Kc7 66.a6 Qb6 67.Ka8 Qa6; 61...Qf6 62.Kb7 Kc5 63.a5 Qb2 64.Kc7 Qg7 65.Kb8 Kc6 66.a6 Kb6 67.a7 Qb7) 0–1. Fournier,Frederic – elsitiodechris, Active, 2004.

5.cd5 Qd5 6.Nf3 Bg4 7.Be2 Qd8 (7...Bb4?? 8.Bg7 Nf6 9.Bh8 (worse 9.Bf6 Rg8+–) 9...Bf3 10.Bf3+– (worse 10.gf3 Qe5+–; worse 10.Bf6 Be2 11.Ke2 Qg2+–)) 8.0–0 Nf6 (8...Bb4?? 9.Bg7 Ne7 10.Bh8+–) 9.a3 Nbd7 10.Nc3 Be7 11.b5 0–0 (11...cb5 12.Nb5 a6 13.Nbd4=) 12.bc6 bc6 13.Nd4 Be2 14.Qe2 Nb8 15.Qc4 Qd7 16.Rac1 Nd5 (16...Rd8 17.Na4+=) 17.Ne4 (17.Nc6 Nc6 18.Nd5 ed5 19.Qc6 Qc6 20.Rc6 Rfb8+–) 17...f5 (better 17...Nb6 18.Qb3 Rd8+=) 18.Nc6?? (better 18.Nc5 Bc5 19.Qc5+–) 18...Nc6–+ 19.Qc6 Qc6 20.Rc6 Kf7?? (better 20...fe4 21.Re6 Rfb8–+) 21.Nd6+– Bd6 22.Rd6 Rab8 23.Be5 Rb7 24.Rc1 (24.Rc6 Ne7 25.Rc4 Rc8 26.Rc8 Nc8+–) 24...Re8 (24...Rc8 25.Rd1+=) 25.d3 (25.f3 g5+–) 25...Nf6 (25...Rc8! 26.Re1 Rc2+=) 26.Rdc6 Ree7 27.Rc7 (27.Kf1 Rb3 28.R1c3 Rc3 29.Bc3 Nd5+–) 27...Rbc7 (27...Rb3 28.R7c3 Reb7 29.Kf1+–) 28.Rc7 Rc7 29.Bc7 Nd5 30.Be5 a6 31.Kf1 g6 32.Ke2 Nb6 33.Kd2 Nd7 34.d4 Ne5 (34...g5 35.Kd3+–) 35.de5+– Ke7 36.Kc3 (36.f4 Kd7+–) 36...Kd7 37.Kb4 Kc6 38.a4 h5? (38...h6 39.h3+–) 39.h3 (39.h4 Kb6 40.a5 Kc6 41.Kc4+–) 39...g5 40.f3 g4 (40...Kb6 41.a5 Kc6 42.h4 gh4 43.Kc4+–) 41.fg4 hg4 (41...fg4 42.hg4 hg4+–) 42.h4 (42.Kc4 gh3 43.gh3 Kc7+–) 42...Kd5 43.h5 (better 43.Ka5 Ke5 44.Ka6+–) 43...Ke4?? (better 43...Ke5 44.h6 Kf6+=) 44.h6+– Ke3 45.h7 f4 (45...a5 46.Ka5 Kf2 47.h8Q Kg2 48.Qf6+–) 46.h8Q f3 47.gf3 gf3 48.Qh6 Ke2 49.Qh5 (49.Qe6!? f2+–) 49...Ke3 50.Qh2 (better 50.Qh3!? a5 51.Ka5 Ke4 52.Qe6 f2 53.Qc4 Ke5+–) 50...f2 51.Qf2! Kf2 52.Kc5 Ke3 53.Kd6 Kf4 (53...Kd4 54.Ke6 Kc5 55.Kd7+–) 54.Ke6 Ke4 55.Kd6 Kd4 56.e6 Kc4 57.e7 Kb4 58.e8Q Ka5 59.Kd5 (59.Qe4 Kb6 60.Qb4 Ka7 61.Kc6 a5 62.Qb7) 59...Kb4 60.Qc6 (60.Qe1 Kb3 61.Kd4 Ka2 62.Kc3 a5 63.Qf2 Ka3 64.Qb2 Ka4 65.Qb3) 60...a5 (60...Kb3 61.Qb6 Kc3 62.Qe3 Kc2 63.Kc4 Kb2 64.Qf2 Kc1 65.Kc3 Kd1 66.Qd2) 61.Qb5 (61.Qc4 Ka3 62.Qb5 Ka2 63.Kd4 Ka3 64.Kc3 Ka2 65.Qb2) 61...Ka3 (61...Kc3 62.Qc5 Kb2 63.Kc4 Kc2 64.Qf2 Kd1 65.Kd3 Kc1 66.Qc2) 62.Qa5 (62.Kc4 Ka2 63.Kc3 Ka3 64.Qb3) 62...Kb3 (62...Kb2 63.Qd2 Kb3 64.a5 Ka4 65.Kc4 Ka3 66.a6 Ka4 67.Qb4) 63.Kc5 (63.Qb5 Kc3 64.Qc4 Kb2 65.a5 Kb1 66.a6 Kb2 67.a7 Kb1 68.a8Q Kb2 69.Qaa2) 63...Kc2 (63...Kb2 64.Qd2 Ka3 65.Kc4 Ka4 66.Qb4) 64.Qb4 (64.Kc4 Kb2 65.Qd2 Ka3 66.a5 Ka4 67.Qb4) 64...Kd3+– 65.Qd4 Ke2 66.a5 Kf3 (66...Kf1 67.a6 Kg2 68.a7 Kf3 69.a8Q Kg3 70.Qg8 Kf3 71.Qgg4) 67.a6 Kg3 (67...Kg2 68.a7 Kf3 69.a8Q Kg3 70.Qg8 Kf3 71.Qgg4) 68.a7 Kg2 (68...Kf3 69.a8Q Kg3 70.Qg8 Kf3 71.Qgg4) 69.a8Q Kg3 70.Qa3 (70.Qg8 Kf3 71.Qgg4) 70...Kg2 71.Qd2 Kf1 72.Qa1 (72.Qac1) 1–0. aravind555 (1745) – Malozy (1720), lichess.org, 2020.

5.Nf3 a6 6.Be2 (6.a3 Nf6=) 6...h6 (6...dc4 7.Bc4 Nf6 8.Qb3=+) 7.Nd4 (7.cd5 cd5 8.Nd4 Bg6=) 7...Bh7 (7...Be4 8.f3 Bb1 9.Rb1 dc4 10.Bc3=) 8.Qb3 (8.a3 dc4 9.Bc4 a5=) 8...Nf6 (8...dc4 9.Bc4 Nf6 10.0–0=) 9.Nc3 (9.0–0 dc4 10.Bc4 Nbd7=) 9...Nbd7 (9...dc4 10.Bc4 Nbd7 11.0–0=) 10.cd5 cd5 (10...ed5 11.0–0=) 11.0–0 Ne4 (11...Rc8 12.Rac1=) 12.Ne4+= Be4 13.f3 (13.d3 Bg6+=) 13...Bh7 14.f4 Be7 (14...Bd6 15.d3+=) 15.f5 (better 15.Ne6 fe6 16.Bg7+=) 15...ef5? (better 15...e5!? 16.Nf3 e4+=) 16.Qd5+– Bb4 (16...Rb8 17.Nf5 Bf5 18.Qf5+–) 17.Nf5 Bf5 18.Rf5 0–0? (18...Qe7 19.Rf4 Nb6+–) 19.Qd4 (19.Qb7?! Bd2 20.Bd4 Qe8+–) 19...Bc5 (19...Ne5 20.Qe5 f6 21.Qe6 Kh8+–) 20.Qg7 1–0. Janek – Ferenc, internet, 2017.

5.Nf3 Bb1 6.Rb1+= Bb4?? (better is 6...Nf6+=) 7.Bg7+– Qe7 8.Bh8 f6 (8...Nd7 9.a3! Ba3 10.cd5 ed5 11.Rb7+–) 9.Nd4 Nd7 (9...c5 10.cd5 ed5 11.Qg4+–) 10.Qh5 Qf7 (10...Kd8 11.Ne6! Qe6 12.Rb4+–) 11.Qf7 (11.Rb4 Qh5 12.Ne6 Qe5 13.Ng7 Ke7+=) 11...Kf7 12.Rb4 Nc5 13.cd5 cd5 1–0. forsetinn (1650) – fyrsyns, gameknot.com, 2013.

5.Nf3 Bb4?? 6.Bg7 dc4 7.Bc4 Ne7 8.Bh8 b5 9.Be2 Qa5 (9...Nd7 10.a4 f6 11.g4+–) 10.a4 Nd7 (10...Qb6 11.Nd4 Be4 12.f3+–) 11.ab5 Qa1 (11...Qb6 12.Na3 Qc5+–) 12.Ba1 Rb8 13.Qa4 Bc5 14.Nc3 Nb6 15.Qa5 Rb7 16.bc6 Nc6 17.Qc5 Rc7 18.Nb5 Nd7 19.Nc7 Kd8 20.Qc6. Pierre – Lellbelly, internet, 2019.

5.Nf3 Bb4?? 6.Bg7 dc4 7.Bc4 f6 8.Bh8 Nd7 (8...b5 9.Bb3 c5 10.Nh4 Bb1 11.Rb1+–) 9.Nd4 Bg6 10.Ne6 Qe7 (10...Qa5+–) 11.Nc7 (11.Nc7 Kf8 12.Na8+–) 1–0. pierre – titus, internet, 2010.

5.Nf3 Bb4?? 6.Bg7 f6 7.Bh8 Kf7 8.Nd4 Bb1 9.Qb1 f5 1–0. GuestDQND – GuestNHTL, freechess.org, 2017.

5.Nf3 Bb4?? 6.Bg7 Nf6 7.Bh8 Ne4 8.Nc3 Nd7 9.cd5 cd5 10.Ne4 Be4 11.Bd4 f6 (11...Qa5 12.Be2+–) 12.Qb3 Qa5 (12...Qe7 13.a3 Bc5 14.Bb5 Bd4 15.Nd4+–) 13.a3 Bf3 (13...Bd6 14.Qb7 Rb8 15.Qa7 Qa7 16.Ba7 Ra8+–) 14.ab4 Qa1 15.Ba1 Be4 16.f3 Bg6 17.e4! Nb6 (17...de4 18.Qe6 Double attack (18.Qe6 Pinning; 18.Qe6 Deflection)) 18.Bf6 de4 19.Qe6 (19.Qe6 Kf8 20.Qe7 Kg8 21.Qg7) 1–0. Dalia – Calau, internet, 2019.

5.Nf3 dc4 6.Bc4 Bd3 7.Qb3 Bc4 8.Qc4 =.

5.Nf3 dc4 6.Bc4 Nf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 dc4 6.Bc4 c6).

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

5.Nf3 Nf6 6.a3 Nbd7 7.Be2 dc4 8.Bc4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 Nbd7 5.Be2 c6 6.c4 dc4 7.Bc4 e6 8.a3).

5.Nf3 h6 6.Qb3 Nf6 7.Nc3 Be7 8.Be2 0–0 9.d4 Nbd7 10.c5 b6 11.0–0 a5 12.a3 Qc7 13.cb6 Qb6 14.b5 cb5 15.Nb5 Rfc8 16.Rfc1 Ne4 17.a4 Nd6 18.Ba3 Rc1 19.Rc1 Rc8 20.Rc8 Nc8 21.Be7 Ne7 22.Qc3 Nf6 23.Nd2 Nc6 24.Bd3 Bd3 25.Qd3 Nb4 26.Qc3 Qc6 27.Qc6 Nc6 28.Nd6 Nd7 29.Nb3 Nb6 30.Nb7 Nc4 31.Kf1 Kf8 32.Ke2 Ke7 33.Kd3 Kd7 34.Kc3 Kc7 35.N7c5 Ne7 36.Nd2 Nd2 37.Kd2 Nf5 38.g3 Nd6 39.f3 h5 40.e4 Kc6 41.Kd3 Nc4 42.e5 Nb6 43.h4 Nc8 44.Ke3 Ne7 45.Nb3 Nf5 46.Kf4 Kb6 47.g4 Nh4 48.gh5 Nf5 49.Kg5 Nd4?? 50.Nd4+– Kc5 51.Nc2 d4 52.Kf4 d3 53.Ne3 Kd4 54.Nd1 d2 55.Nf2 Kc3 56.Kg5 Kb4 57.h6 gh6 58.Kh6 Ka4 59.Kg7? Kb3 60.Kf7 a4 61.Ke6 a3 62.Kf7 a2 63.e6 a1Q 64.e7 Qa7 0–1. Babanau,Vasil – Grybas,Gintaras (1990), Vilnius LTU, Saltinis Open, 2013.

5.Nf3 h6 6.c5 Nf6 7.Be2 Be7 8.d3 (8.0–0 0–0=) 8...Nbd7 (8...b6!?=+) 9.0–0 a5 10.a3 0–0 11.Nbd2 ab4 12.ab4 b6 13.Ra8 Qa8 14.Nd4 (14.cb6 Bb4 15.Qc2 c5=) 14...Bh7 15.cb6 (15.b5 cb5 16.c6 Ne5=) 15...Bb4=+ (worse 15...Nb6 16.Qb3=) 16.Qc2 c5 (worse 16...Nb6 17.Nc6 Rc8 18.Rc1=) 17.N4f3 Qb7 18.Ra1 Qb6 19.h3 (19.Ne5 Rb8 20.Ndf3 c4–/+) 19...c4! 20.Bf6 (20.dc4 Bc2 Pinning (20...Bc2 Deflection)) 20...Nf6 21.Ne5 1–0. GuestDHGV – GuestMHBR, freechess.org, 2017.

5.f4 Bb4?? 6.Bg7 dc4 7.Bh8 +–.

5.f4 Nf6 6.a3 dc4 7.Bc4 b5 8.Be2 +=.

5.f4 Nf6 6.a3 Be7 7.Nf3 (7.cd5 ed5 8.Nf3 a5+=) 7...0–0 (7...dc4 8.Bc4 b5 9.Be2+=) 8.Be2 (8.Nd4 Bg6+=) 8...h6 (8...dc4 9.Bc4 b5 10.Ba2–/+) 9.0–0 (9.Nd4 dc4 10.Nf5 ef5 11.Bc4 b5=) 9...Nbd7 (9...dc4 10.Bc4 b5 11.Be2+=) 10.Ne5 (10.Nd4 dc4 11.Nf5 ef5 12.Bc4 Nb6=) 10...Ne5 (10...dc4 11.Bc4 a5 12.b5 cb5 13.Bb5+=) 11.fe5= Nd7 12.d4 Bg5 13.Qb3 (13.Bc1 f6=) 13...dc4+= 14.Bc4 Nb6 15.Be2 (15.Nd2!?+=) 15...Qd5–/+ 16.Nd2 Qb3 17.Nb3 Be3 18.Kh1 Rfd8 19.Rf3 Bg5 (19...Nd5 20.Bc4 Bg5 21.Nc5–/+) 20.Rff1 (20.Nc5 Rab8 21.Re1 Nd7–/+) 20...Rab8 21.a4 (21.Rae1 Nd5–/+) 21...Nd5 22.b5 Ne3 23.Rf2 Nc2 24.Rd1 Ne3 25.Ra1 Ng4 26.Bg4 Bg4 27.Raf1 Bh5 28.Ba3 Be3 29.Ra2 Rd5 30.Bc5 cb5–+ 31.Re1 Bg5 32.a5 a6 33.g3 Bf3 34.Kg1 Rd7 35.Bd6 Re8 36.Nc5 Rdd8 37.Rc2 Be7 38.Be7 Re7 39.Kf2 Bd5 40.Rec1 f6 41.ef6 Rf8 42.Ke3 Rf6 43.Ne4 Rf8 44.Rc7 Rc7 45.Rc7 Rf1 46.Nc5 b4 47.Rc8 Kh7 48.Nd3 b3 49.Kd2 Rh1 ½–½. Arkell,KC – Mannion,S, GLC Masters London, 1986. (=1.c4 c6 2.b4 d5 3.e3 Bf5 4.Bb2)

5.h4 Bb4?? 6.Bg7 dc4 7.Bc4 +–.

5.h4 Nf6–/+ 6.a3 Bd6 (6...dc4 7.Bc4 b5 8.Be2 a5 9.d3 e5 10.Be5 ab4 11.a4 ba4+=; 6...Nbd7 7.Nf3 dc4 8.Bc4 Nb6 9.Be2 Be7 10.h5 0–0 11.Nd4 Be4+=; 6...Be7 7.cd5 ed5 8.Ne2 0–0 9.Nd4 Bg4 10.Qc2 Re8 11.f3 Bd7+=) 7.c5 Bc7 8.Nf3 0–0 9.Be2 b6 10.Qc1 bc5 11.bc5 Qe7 +=.

5.h4 Nf6–/+ 6.Qb3 Be7 (6...dc4 7.Bc4 Bd6 8.b5 0–0 9.d3 a6 10.a4 Nbd7 11.bc6 bc6+=; 6...Bd6 7.c5 Bc7 8.Nf3 Nbd7 9.Be2 0–0 10.0–0 Bg4 11.d3 e5+=; 6...Nbd7 7.Nf3 dc4 8.Bc4 Nb6 9.Be2 Bd6 10.Nd4 Be4 11.Nc3 Bg2+=) 7.Nf3 0–0 8.Bf6 Bf6 9.d4 Be7 10.c5 b6 11.Bd3 Bd3 +=.

5.h4 Nf6–/+ 6.b5 h6 (6...Bd6 7.bc6 Nc6 8.cd5 ed5 9.Qf3 Be4 10.Bf6 gf6 11.Qd1 d4+=; 6...a6 7.bc6 Nc6 8.cd5 Nd5 9.Nc3 Rc8 10.Nf3 Qb6 11.Qb3 Qb3–/+; 6...dc4 7.Bc4 a6 8.a4 Bd6 9.d3 Bb4 10.Nc3 ab5 11.ab5 Ra1–/+; 6...Be7 7.Nf3 dc4 8.Bc4 0–0 9.Nd4 Be4 10.0–0 cb5 11.Bb5 e5–/+) 7.Nf3 Bd6 8.Be2 (8.Nd4 Bg4 9.Qa4 Qb6 10.Bc3 Ne4 11.Ba5 Qc5=) 8...Nbd7 (8...dc4 9.Bc4 0–0 10.Qa4–/+ a6 11.Ba3 Ne4–/+) 9.0–0 (9.bc6 bc6 10.Nd4 Be4 11.d3 Qb6=) 9...0–0 (9...dc4 10.bc6 bc6 11.Na3 Ba3 12.Ba3+=) 10.d4 (10.bc6 bc6 11.Nd4 Qb6+=) 10...Ne4 (10...dc4 11.bc6 bc6+=) 11.Nc3 (11.c5 Be7+=) 11...Nc3 (11...dc4+=) 12.Bc3 dc4 13.bc6 bc6 14.Bc4 Bg4 15.Be2 Nf6 16.Ne5 (16.Rc1!?+=) 16...Be2–/+ 17.Qe2 c5 (17...Nd5!? 18.Rac1 Be5 19.de5 Qh4+=) 18.dc5 Bc5 19.Nc6 Qc7 20.Bf6 Qc6 (20...gf6!? 21.Nd4 Bd4 22.Qg4 Kh7 23.Qd4 Qe5+=) 21.Qg4+/– g6 22.Qf4 0–1. Kamaletdinov,Farit – Papuev,Viktor, Belorechensk Russia, Open, 2013.

5.h4 Nf6–/+ 6.c5 b6 (6...a5 7.a3 b6 8.d4 ab4 9.ab4 Ra1 10.Ba1 Be7 11.Nf3 0–0+=; 6...Be7 7.Nf3 b6 8.Nd4 Bb1 9.Rb1 bc5 10.bc5 Bc5 11.Qc2 Qe7+=; 6...Nbd7 7.Nf3 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 b6 11.b5 Nc5+=) 7.d4 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 Be7 11.Nf3 0–0 +=.

5.a4 Nf6

6.Qb3 a6 7.Nc3 (7.Nf3 dc4 8.Bc4 Nd5=) 7...Qb6 8.b5 a5 (8...ab5 9.ab5 Ra1 10.Ba1+=) 9.Ba3 (9.Nf3 Nbd7=) 9...c5 (9...dc4!? 10.Bc4 Ba3 11.Ra3 0–0=) 10.cd5= ed5 (10...Bd6 11.e4 Ne4 12.Ne4 Be4 13.de6 fe6 14.Qe6 Kd8 15.Ne2+=) 11.Nd5+= Nd5 12.Bc4?? (better is 12.Qd5 Be6 13.Qe4+=) 12...Nf6 (12...Nb4 13.Bf7 Ke7 14.Bb4 ab4 15.Rc1–/+) 13.Bf7–/+ Kd8 (13...Kd7 14.Nf3–/+) 14.Nf3 Nbd7 (14...Be4 15.Rd1–/+) 15.Ng5 (15.0–0 Bd6–/+) 15...h6 (15...Bd6 16.f4–/+) 16.Ne6 Be6 17.Be6 Ke7 (17...Bd6 18.f4–/+) 18.Bd7 (18.Bc4+=) 18...Kd7 (18...Nd7 19.d3–/+) 19.Rc1 (better is 19.Qf7!? Kc8 20.d4+=) 19...Rc8 20.Qf7 Kd8 21.0–0 Rc7 22.Qg6 (22.Qc4 Bd6–/+) 22...Qe6 23.Rc3 Qe4 24.Qe4 (24.Rd3 Rd7 25.Rd7 Kd7 26.Qf7 Qe7+=) 24...Ne4 25.Rc4? (better is 25.Rd3!? Ke8 26.Rc1–/+) 25...Nd2–+ 26.Rd1 Rd7 27.Rcc1 c4 28.Bf8 Rf8 (28...Rf8 29.f4 g5–+) 0–1. Zylla,Johannes – Wafzig,F, BS–MK Kreisliga, 1994.

6.Qb3 Bd6 7.Nf3 +=.

6.b5 a5 7.Nf3 Be7 8.Be2 h6 9.0–0 Nbd7 (9...0–0 10.d3=) 10.Nc3 (10.Nd4 Bh7+=) 10...0–0 (10...dc4!? 11.Bc4 0–0=) 11.Nd4 Bg6 (11...cb5 12.Nf5 ef5 13.cb5+=) 12.bc6+– bc6? (better 12...Qb6 13.cd7 Qb2 14.cd5 e5+–) 13.Nc6+– Qe8 14.Ne7 Qe7 15.Ba3 Nc5 (15...Qd8 16.Bf8 Nf8 17.cd5 ed5+–) 16.d4 Rfd8 (16...Nfd7 17.dc5 (worse 17.Bc5 Nc5 18.dc5 Qc5+–) 17...Nc5 18.cd5+–) 17.Bc5 (worse 17.dc5 dc4 18.Qe1 Bd3+–) 17...Qc7 18.cd5 Nd5 19.Nd5 Rd5 (19...ed5 20.Bb5+–) 20.Bf3 Qc5 (20...Rc5 21.Ba8 Rc4 22.Rc1+–) 21.dc5 Rd1 22.Rfd1 Rc8 23.c6 e5 (23...Kf8 24.Rac1 Rc7 25.Rc5+–) 24.Rac1 e4 25.Bg4 f5 26.Be2 Bf7 (26...Kh7 27.c7 f4 28.Bg4 Rc7 29.Rc7 fe3 30.fe3+–) 27.c7 Be6 28.Ba6 Kh7 29.Bc8 Bc8 30.Rd8 Ba6 31.c8Q (31.Rc6 Bb7 32.Rb6 Bd5 33.c8Q Bg8 34.Rg8 g5 35.Rb7) 31...Bc8 32.Rdc8 g5 33.R1c6 f4 34.R8c7 Kg8 35.Rb6 (35.Rb6 fe3 36.Rb8; 35.Rd7 fe3 36.Rc8) 1–0. BeepBeepImAJeep (2585) – bolkovisch (2115), lichess.org, 2015.

6.b5 a6 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 cb5 10.cb5 Nbd7 11.Nc3 Be7 12.Be2 0–0 13.0–0 Qb6 (13...e5 14.Bb2=+) 14.d4 (14.Nh4 Bg6=) 14...Ne4 15.Ne4 Be4 16.Nd2 Bg6 17.Qb3 Rc8 18.Bc3 Qc7 19.Bb2 (19.Bb4 Nb6=) 19...Bd6 20.Nf3 (better 20.Rc1!? Bc2 21.Qa2=) 20...Qc2–/+ 21.Bd1 Qb3 22.Bb3 Bd3 23.Ra1 Bb5 24.g3 (24.Ne5 Nb6–+) 24...Nb6 25.Ne5 f6 26.Nf3 Ra8 (26...Kf7 27.Kg2–+) 27.Rb1 (better 27.Ra8 Na8 28.Bc2–+) 27...Rc8 28.Bc1?? (28.Ra1 Kf7 29.Kg2–+) 28...Bd3–+ 29.Ra1 Ra8 (29...Kf7 30.Ne1 Bf5 31.Nf3–+) 30.Ra8 Na8 31.Ne1 Bc4 32.Bc2 b5 33.Nd3 Nb6 (33...Nc7 34.Bd2–+) 34.Nc5 Kf7 35.f4 b4 (35...g6 36.Bd2–+) 36.Nb3? (better 36.Bd2=+) 36...Na4 37.Kf2 Nc3 38.Bd2 Bb3 39.Bb3 Ne4 40.Ke1 Nd2 (40...f5 41.Kd1–+) 41.Kd2–/+ Kg6 (41...f5 42.h3–/+) 42.Kd3 (42.g4 h6–/+) 42...Kf5 (42...f5 43.h3–+) 43.Bc2 (43.h3 Kg6–/+) 43...Kg4–+ 44.e4 (44.Ba4 Kh3–+) 44...de4 45.Ke4 Kh3 46.Bb3 (46.f5 e5–+) 46...Kh2 47.g4 Kg3 48.Be6 Bf4 49.Bb3? (49.Kf5–+) 49...Kg4 50.d5 (50.Bd1 Kg5–+) 50...Bd6 51.Ke3 f5 52.Bd1 (52.Bc2 g5–+) 52...Kg3 53.Bc2 (53.Kd4 f4–+) 53...f4 54.Ke4 f3 55.Bd3 f2 56.Ke3 h5 57.Kd2 h4 58.Bf1 h3 59.Ke3 h2 60.Bh3 Kh3 (60...h1Q 61.Kd4 Qd1 62.Kc4 Kh3 63.Kb5 f1Q 64.Kc6 Qc2 65.Kd6 Qf8 66.Ke5 Qf6) 61.Kf2 (61.Ke2 h1Q 62.Kd3 f1Q 63.Ke3 Qhf3 64.Kd4 Q1d3) 61...h1Q 62.Ke3 Qd5 63.Ke2 b3 (63...Qe4 64.Kd1 b3 65.Kd2 Bb4 66.Kd1 Qc2) 64.Kf2 (64.Ke3 b2 65.Kf2 Qd3 66.Kg1 b1Q 67.Kf2 Qbf1) 64...b2 (64...Qe4 65.Kf1 Qf3 66.Ke1 Bb4) 65.Ke2 (65.Ke3 b1Q 66.Ke2 Qdd3 67.Kf2 Qbf1) 65...b1Q 66.Kf2 Qbb3 (66...Qc2 67.Ke3 Qdd3) 67.Ke1 (67.Ke2 Qbf3 68.Ke1 Qdd1) 67...Qh1 (67...Qe3 68.Kf1 Qdd3) 68.Kd2 (68.Ke2 Qhf3 69.Kd2 Qbc3) 68...Qg2 (68...Qhd1) 69.Ke1 Qb1 (69...Bb4) 0–1. BeepBeepImAJeep (2700) – HIALUPHARMpl (2535), lichess.org, 2020.

6.b5 a6 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 Nbd7 10.Be2 Bb1 (better 10...dc4 11.Bc4 Bd6=) 11.0–0?? (better 11.Qb1 Bd6 12.bc6 bc6 13.Qb7+=) 11...Bg6 12.d4 (12.bc6 bc6 13.Qa4 Qc8–+) 12...dc4 13.Bc4 Bd6 14.bc6 bc6 15.Qc1 (15.Ne5 Nd5–+) 15...Qc7 16.h3 0–0 17.Bc3 c5 18.dc5 Qc5 19.Bd4 Qc7 20.Be2 Qc1 21.Rc1 Nd5 (21...e5 22.Ba1–+) 22.Nd2 (22.Nh4 e5 23.Ng6 hg6–+ (23...fg6?! 24.Bc4 N7f6 25.Ba1–+; 23...ed4?! 24.Nf8 Kf8 25.ed4=+)) 22...N7f6 (22...e5 23.Bb2–+) 23.Nc4 Rc8 24.Ra1 Bf8 25.Ne5 Bd6 26.Ng6?? (better 26.Nc4=) 26...hg6–+ 27.Ra7 (27.f4 Ne4–+) 27...Rc1 (27...e5 28.Ba1–+) 28.Bf1 Ne4 (28...e5 29.Ra8 Kh7 30.Ra1–+) 29.Ra2 (29.Ra8 Kh7–+) 29...Ndc3 30.Rb2 (30.Bc3 Nc3 31.Rd2 Be5–+) 30...e5 (better 30...Nb1 31.Ra2 Ned2–+) 31.Bc3 Nc3 32.g3 Bc5 33.Kg2 Ne4 34.Bd3 Nf6 (34...Nd6 35.Rc2 Rc2 36.Bc2–+) 35.Rb7 e4 36.Bb1 Rd1 37.Ba2 Rd2 (better 37...Rd7!? 38.Rd7 Nd7 39.h4–+) 38.Bf7 Kh7 39.Kf1 Rd1 40.Ke2 Rc1 41.Kd2 Nd5?? (better 41...Rh1 42.Be6 Bd6–+) 42.Kc1+– (42.Kc1 Nf6 43.Kd2+–) 1–0. BeepBeepImAJeep (2750) – hessed26 (2620), lichess.org, 2020.

6.b5 a6 7.Nf3 Nbd7 8.Nd4 Bg6 9.bc6 bc6 10.Nc6 Qc7 11.Bf6 Nf6 12.cd5 Nd5 13.Nd4 e5 14.Nf3 Nb4 15.Na3 Rc8 16.Bc4 Nd3 17.Bd3 Bd3 18.Ng1 (18.h3 Bd6–/+) 18...Bb4 (18...Qb7 19.Nf3 Qb2 20.Ne5 Qe5 21.f4–+) 19.f3 (19.Ne2 Qd6 20.Nb1 0–0–/+) 19...0–0 20.Kf2 Rfd8 21.Ra2 Qc5 22.Qa1 Bg6 (22...Bg6 23.Kg3 Bd2–+) 0–1. Zschalich,Arndt – Foerster,Hans Juergen, corr DDR, 1989.

6.b5 Bb4 7.Nf3 0–0 8.Be2 Nbd7 9.0–0 a5 10.Nd4 Bb1 11.Rb1 c5 12.Nc2 (12.Nf3 dc4 13.Qc2 Nb6=) 12...dc4 13.Bc4 Nb6 14.Nb4 Nc4 (worse 14...cb4 15.Bb3+=) 15.Bf6 Qf6 16.Nc2 (16.Nd3 Rfd8 17.Rb3 Qf5=+) 16...Rad8 (16...Rfd8 17.d4–/+) 17.d4=+ cd4 18.Nd4 e5 19.Qe2 Nb6 20.Nb3 Na4 21.Ra1 Nc3 22.Qb2 Nb5 23.Na5 Nd6 24.Qb6 (24.Nb7 Rb8 25.Ra7 Rfd8=+) 24...Rd7–/+ 25.Rad1 (25.Nb3 Qe7–/+) 25...Rfd8 26.h3 Ne4 (26...Qh4 27.Rc1–/+) 27.Qf6 gf6 28.Rd7 Rd7 29.Rb1 Nc5 30.g4 Kf8 31.Rb5 Rc7 32.Kg2 Ke7 33.Kf3 Ke6 34.Rb6 Ke7 35.h4 (35.Rb5 Kd6=+) 35...Rd7 (35...h6 36.e4=+) 36.Ke2 (36.Nb3 Nd3=) 36...Rc7 37.f4 (37.Kf3 h6=+) 37...ef4 38.ef4 Nd7 (38...Rd7!?=) 39.Rb7+= Rb7 40.Nb7 Ke6 (40...f5!? 41.g5 Nf8+=) 41.Nd8+– Ke7 42.Nc6 Kd6 43.Nd4 Nc5 44.Nf5 Kd5 45.Ke3 Ne6 (45...Na4 46.Nh6 Nb6 47.Ng8+–) 46.Nh6 Nd8 (46...Nd4 47.Ng8 f5 48.Nf6 Ke6 49.g5 (49.Kd4?! Kf6 50.g5 Kg6=; 49.Nh7?! Nc2 50.Kd2 Nb4+–) 49...Nc2 50.Kf2+–) 47.f5 (47.Ng8 f5 48.gf5 Nb7+–) 47...Ke5 48.Kf3 Kd6 49.Ke4 Ke7 50.Ng8 Kf8 51.Nf6 Kg7 52.Nh5 Kf8 53.Ke5 (53.g5 Nc6+–) 53...h6 54.Kf6 Nb7 55.Nf4 (better 55.g5 hg5 56.Kg5+–) 55...Nc5? (55...Nd6 56.Nh3+–) 56.Ke5 (better 56.Ng6!? Kg8 57.Ne5 Ne4 58.Ke7+–) 56...Nd7 57.Kd6 (better 57.Ke4!?+–) 57...Nf6+= 58.g5 hg5 59.hg5 Ne4 60.Ke5 White plans f6 60...Ng5 61.Kf6 (61.Nd5 Ke8=) 61...Ne4= 62.Ke5 Ng3 63.f6 Kg8 64.Nd5 Nh5 65.Ne7 Kh7 66.Kf5 Nf6 67.Kf6 Kh6 68.Nf5 Kh5 69.Ng7 Kh4 70.Ne8 Kg4 71.Nd6 Kh5 72.Kf5 Kh6 73.Ne4 f6 74.Ng3 Kg7 75.Nh5 Attacks the isolani on f6 75...Kf7 76.Nf4 Ke7 77.Nd5 Kd6 78.Ne3 Kc5 79.Kf4 Kd4 80.Nf5 Kd5 81.Ne7 Ke6 82.Ng6 Kf7 83.Nh4 Kg7 84.Nf3 Kh6 85.Kg4 f5 86.Kf4 Kh5 87.Ne5 Kh4 88.Nd7 1–0. BeepBeepImAJeep – EnergyVision (2535), lichess.org, 2017.

6.b5 Bb4 7.Nf3 Ne4 8.Be2 0–0 9.0–0 a5 10.d3 Nf6 11.d4 (11.Nh4 Bg6+=) 11...Nbd7 12.Nbd2 Ne4 13.Ne4 Be4 (13...de4 14.Ne1=) 14.Nd2 Bg6 15.c5 (15.Ba3 Ba3 16.Ra3 Qe7=) 15...f6 (15...e5 16.Nb3=) 16.f4 Qe7 17.Nf3 (17.Ba3 e5 18.Bb4 ab4+=) 17...Rae8 (17...e5 18.Rf2=) 18.Ba3 Ba3 19.Ra3 e5 20.bc6 (20.Rf2 Be4=) 20...bc6 21.fe5 (21.Rf2 Rb8 22.Qd2 Rb4=+) 21...fe5=+ 22.Re1 (22.Ra2 Bh5=+) 22...Bh5 23.Ne5 (23.Ra1!?=+) 23...Be2–/+ 24.Qe2 Ne5 25.de5 Qc5 26.Rd3 (26.Qb2!? Qe7 27.Rc1–/+) 26...Re5–+ 27.Qd2 Rfe8 28.h3 (28.Rc1 Qb6 29.Rcc3 Rf8–+) 28...Qb4 29.Qd1 (29.Qb4 ab4 30.Rb3 Re4–+) 29...Re4 Black prepares d4 30.Re2 (30.Qa1–+) 30...d4! 31.Red2? (31.Rd4 Re3 Deflection; 31.ed4 Re2 Pinning (31...Re2 Deflection)) 31...de3–+ 32.Re2 c5 (32...Qa4 33.Qa4 Ra4 34.Rde3 Re3 35.Re3–+) 33.Rd8 Qc3 (better 33...h6!?–+) 34.Qd5–/+ Kh8 35.Qe4 Rd8 36.Re3 Qa1 (36...Qd4 37.Kf2 h6 38.Kg3–/+) 37.Kh2 Qf6 38.Qe8 Qf8 39.Qf8 Rf8 40.Rc3 Rg8 (better 40...Rc8!?=+) 41.Rc5+= h6? (better 41...Ra8!?+=) 42.Ra5+– Rf8 43.Ra7 Kh7 44.a5 Rf2 45.a6 Ra2 46.Kg3 Ra4 47.Rb7?? (47.Ra8 Kg6+–) 47...h5? (better 47...Ra6 48.Kf4 Kg6=) 48.a7+– Ra3 (48...Kg6 49.Kf3+–) 49.Kh2 (better 49.Kf4!? Ra5+–) 49...Ra6 (49...h4 50.Kg1+–) 50.Rb4 (50.Rb4 Ra7 51.Rb5=) 1–0. BeepBeepImAJeep (2680) – Gowez (2190), lichess.org, 2015.

6.b5 dc4 7.Bc4 Be7 8.Nf3 0–0 9.Be2 cb5 10.ab5 Nbd7 11.0–0 Nc5 (11...Bd6 12.Nd4=) 12.d4 Nce4 (12...Ncd7 13.Nc3=) 13.Nbd2 (13.Nh4 Re8+=) 13...Nd2= 14.Nd2 Ne4 15.Bf3 Nd2 16.Qd2 Qb6 17.Qa5 Qa5 18.Ra5 b6? (better 18...Rfb8+=) 19.Ra6+– (19.Ba8 ba5 20.Bc6 Bd3=) 19...Rac8 20.Ra7 Rc2 21.Ba1 Bd3?? (better 21...Bd6 22.e4 Bg6+–) 22.Rd1+– (22.Re7?! Bf1 23.Kf1 Rc1 24.Ke2 Ra1+–) 22...Bd6 (22...Bb5 23.Be4 Rc4 24.Re7+–) 23.Rd3 Rc1 24.Rd1 Rfc8 25.Kf1 (25.Bb2 R1c2 26.Ra2 f5+–) 25...Bb4 (25...Rd1 26.Bd1 Rc1+–) 26.Ra8 (better 26.Rc1 Rc1 27.Ke2 Rc2 28.Kd1+–) 26...Rd1–+ 27.Bd1 Ra8 28.Bb2 Ra2 29.Bc1 Ra1 30.Ke2 Rc1 31.Bb3 Rb1 32.Bc4 Rb2 33.Kf3 (33.Kf1 Kf8–+) 33...Be1 34.Be2 f5 (34...g5 35.h3–+) 35.g3 (35.h3 g5 36.g4 h5 37.gf5 ef5–+) 35...g5 36.Bc4 (36.e4 fe4 37.Ke3 Rb3 38.Ke4 Bf2 39.Bd3–+) 36…Rf2 0–1. BeepBeepImAJeep (2650) – universe64 (2330), lichess.org, 2017.

6.b5 dc4 7.Nf3 Bd6 8.Bc4 Bg6 9.0–0 0–0 10.d4 cb5 11.ab5 Nbd7 12.Nbd2 Rc8 (12...Qe7 13.Ne5=) 13.Be2 (13.Ra7!? Nb6 14.Be2+–) 13...Bb8= 14.Nc4 Nb6 (14...Nd5 15.Rc1=) 15.Nce5 (15.Nb6 Qb6 16.Ba3 Bc2+=) 15...Ne4 (15...Bc2 16.Qe1=) 16.Rc1 (16.Ba3 Nc3 17.Qd2 Ne2 18.Qe2 Re8 19.Ng6 fg6+–) 16...Nd6 (16...Rc1 17.Qc1 Bf5 18.g4=) 17.Qb3 (17.Rc8 Qc8 18.Ng6 fg6+–) 17...Be4 18.Rc8 Qc8 19.Rc1 Bd5 20.Qa3 (20.Qd3 Qd8 21.Nd2 f6+=) 20...Qd8 (20...Qe8 21.Ne1=+) 21.Bc3 (21.Qb4 Qe8 22.Ba3 f6=) 21...Re8 (21...f6!? 22.Nd3 Nb5–/+) 22.Bb4 (22.Ba5 f6 23.Bb6 ab6=) 22...Ne4 (22...f6 23.Nd3=+) 23.Bd3 (better 23.Qa5=) 23...Nf6?? (better 23...f6 24.Nc4 Nc4 25.Bc4 Bc4 26.Rc4 Qd5=+) 24.Bc5 (24.Ng5!? Be5 25.de5 Bc4+–) 24...h6 25.Bb1 (25.Nd2 Nbd7 26.Nd7 Qd7 27.Ba7 Ba7 28.Qa7 Rc8 29.Rc8 Qc8+–) 25...Nfd7 26.Qd3 Ne5?? (better 26...f5+=) 27.Qh7 (27.Ne5?! f5+=) 1–0. BeepBeepImAJeep (2715) – erindreki (2440), lichess.org, 2015.

6.b5 c5 7.Nf3 Nbd7 8.Be2 Be7 9.0–0 h6 10.d4 0–0 11.Nbd2 Rc8 12.Rc1 Ne4 (12...Bg6 13.Re1=) 13.Ne4 (13.cd5 ed5 14.dc5 Ndc5=) 13...Be4 14.Nd2 Bg6 (14...cd4 15.Ne4 de4 16.ed4+=) 15.cd5+= ed5 16.dc5 (16.Bf3 Bd3 17.Re1 Nb6 18.dc5 Rc5 19.Rc5 Bc5+–) 16...Nc5 17.Ba3 (17.Bd4 Bd6+=) 17...b6 18.Nb3 Qd7 (18...Bd6 19.Bg4 Rc7 20.Nd4=) 19.Nd4 (19.Bg4 Bf5 20.Bf5 Qf5+=) 19...Rfe8 20.Nc6 Bf8 (20...Bd6 21.Bg4 f5 22.Bf3+– (22.Qd5?! Bf7 23.Qd4 fg4=)) 21.Bg4+– f5 22.Bh5 (22.Bf3!?+–) 22...Bh5+= 23.Qh5 Na4 (better 23...Re4!?=) 24.Bf8+– Rf8 25.Rfd1 (25.Qh4 Nc5 26.Ne7 Kh7 27.Nc8 Rc8+–) 25...Nc5 (25...Kh7 26.Qf3+=) 26.Rd5 Qe6 (26...Qe8 27.Rf5 Qh5 28.Rh5+–) 27.Rcd1 (27.Re5 Qf6 28.Rf5 Qe6+–) 27...Qf7 (27...Rc7 28.Rd6 Qf7 29.Qf7 Rff7 30.f3+=) 28.Rf5! Qh5 (28...Qf5 29.Ne7 Double attack (29.Ne7 Decoy)) 29.Rh5 Rc7 30.Re5 a6 31.Ne7 Kh7 32.ba6 (32.Nd5 Rd8+–) 32...Na6 33.f4 Nc5 (better 33...b5+–) 34.Nc6?? (34.Nd5 Rd7+–) 34...Rf6?? (better 34...Rc6 35.Kf2 b5–+) 35.Nb4+– Na4 36.Nd5 Rd6 37.Rd4 Rc1 38.Kf2 Nc5 39.Kg3 Re1 (39...Rg6 40.Kh3 Rd6 41.f5+–) 40.f5+– Nb3 (40...h5 41.Re8+–) 41.Rg4 Nc5 (41...h5 42.Rg5 Kh6+–) 42.Re7 (42.Re7 Ne4 43.Kf4+– (43.Rge4?! Rd5 44.f6 Rg5 45.Rg4 Rg4 46.Kg4 Rf1 47.fg7 b5+–; 43.Ree4?! Rd5 44.Re7 Kh8+–)) 1–0. BeepBeepImAJeep – ArminTanzarian (2445), lichess.org, 2017.

6.b5 Bc5 7.Nf3 Nbd7 8.Be2 0–0 9.0–0 Re8 10.d4 Bd6 11.Nbd2 Bc7 12.Rc1 Nb6 13.a5 Nc4 14.Nc4 dc4 15.a6?? (15.bc6 bc6 16.a6 Qd6=) 15...ba6?? (better 15...cb5 16.Ra1 Rb8–+) 16.bc6+= Rc8 (16...Be4 17.Ne5+=) 17.Bc4+– Bb6 (17...a5!?+–) 18.Ba6 Rc7 19.Bb7 Qd6 20.Qb3 Nd5 21.Ba3 Qd8 22.Ne5 f6 (22...Qg5 23.f4 Qd8 24.Nc4 Ne3 25.Ne3 (worse 25.Qe3 Bd4 26.Rfd1 Be3 27.Ne3 Qb8–/+) 25...Qd4 26.Rc3+–) 23.Nc4 h6?! (23...Bg6+–) 24.Nd6 (24.Nb6?! Nb6 25.Bc5 Nc8+–) 24...Rf8 (24...Bg6+–) 25.Nf5 ef5 26.Bf8 (better 26.Ba6 Re8 27.Bc4 Kh7 28.Bd5 Kg6+–) 26...Qf8 (26...Kf8 27.Qd3 g6+–) 27.Qd5 (27.Qd5 Kh7 28.Qf5 g6 29.Qf4+–) 1–0. BeepBeepImAJeep (2650) – Manitou (1840), lichess.org, 2017.

6.c5 a5 7.Bc3 ab4 8.Bb4 Na6 9.Ba6 ba6 –/+.

6.b5 Nbd7

7.Nf3 Bb4 8.Nd4 Qc7 (8...Bb1 9.Rb1 c5 10.Nc2=) 9.Nf5+= ef5 10.Be2 (10.bc6 Qc6 11.Qb3 Qd6+=) 10...dc4 11.Bc4 0–0 12.0–0 (12.Qf3 f4+=) 12...Ne5 (12...cb5 13.Bb5 Rfd8 14.Qb3=) 13.Be2 Rad8 (13...Rfc8 14.f4 Ned7 15.Qb3+=) 14.d4 (14.Qc2 Neg4 15.g3 f4+–) 14...Ng6 15.Nd2 Bd2 (15...f4 16.Nc4=) 16.Qd2+= Ne4 (16...f4 17.Rac1+=) 17.Qc2+– Rd6? (better 17...Rc8+–) 18.Ba3+– c5 (18...Ne7 19.Bd6 Qd6+–) 19.dc5?? (better 19.f3 Nf6 20.Qc5 (20.dc5?! Re6+–; 20.Qf5?! Rd5 21.Qc2 Re8+–; worse 20.Bc5 b6=+) 20...Qc5 21.Bc5+– (21.dc5?! Rd2 22.Kf2 Ne5+–)) 19...Rc8?? (19...Rd2 20.b6 Qd8 21.Qb3 Re2 22.c6–/+) 20.Rac1?? (better 20.Rfd1+–) 20...Rd2–/+ 21.Qc4? (better 21.b6 ab6 22.Qc4 bc5 23.f3–/+) 21...b6?? (21...Ne5 22.Qb3 Re2 23.b6–+) 22.c6 (better 22.cb6 Qc4 23.Bc4 ab6 24.Bf7 Kf7 25.Rc8+–) 22...Ne5–+ 23.Qb3 Re2 24.Rc2 (24.h3 Rd8 25.Rcd1 Red2–+) 24...Rc2 (better 24...Nd2!? 25.Qa2 Ng4 26.g3 Nh2 27.Kh2 Nf1 28.Kg1 Rc2 29.Qc2 Ng3 30.fg3 Qg3 31.Kf1 Qf3 32.Qf2 Qh1 33.Qg1–+) 25.Qc2 Rd8 (25...Ng4 26.g3–+) 26.f3 (26.Rd1 Rd1 27.Qd1–/+) 26...Nf6 (better 26...Rd2!? 27.Qb1 Nc4–+) 27.Qf5–/+ Nc4 28.Bb4?? (better 28.Qf4 Nd5 29.Qc4 Ne3 30.Qh4 Nf1 31.Kf1 Rd1 32.Ke2=+) 28...Ne3–+ 29.Qb1 Nf1 30.Qf1 Qe5 (30...Qf4!? 31.Qb1–+) 31.Qc1 (31.Kh1–+) 31…Qd4 (31...Qd4 32.Kf1 Qb4–+) 0–1. BeepBeepImAJeep (2745) – erindreki (2425), lichess.org, 2015.

7.Nf3 c5 8.Be2 h6 9.0–0 Be7 10.d4 0–0 11.Nbd2 Rc8 12.Rc1 Qa5 (12...dc4 13.Nc4 Nb6 14.Nb6 Qb6 15.dc5 Rc5 16.Rc5 Qc5 17.Qd2=) 13.Bc3 (13.cd5 ed5 14.Nb3 Qb6 15.dc5 Nc5+–) 13...Qc7= 14.Qb3 (14.cd5 Nd5 15.Bb2 N5f6=) 14...Qb8 15.Qb2 cd4 (15...Nb6 16.Qa1=) 16.Bd4 Bc5 (16...Bd6 17.cd5 e5 18.Bc3 Nd5 19.e4 Nc3 20.Rc3 Rc3 21.Qc3=) 17.cd5+= Bd4 (17...ed5!? 18.a5 Qd6+=) 18.Nd4+– (18.Qd4?! e5 19.Qh4 Nd5+=) 18...Nd5 19.Nf5 (19.e4!? Nf4 20.ef5+–) 19...ef5+= 20.Bf3 N5f6 21.Nb3 Ne5 22.Be2 Neg4 23.g3 h5 (23...Ne4 24.Rc8 Rc8 25.b6+=) 24.Nd4+– g6 (24...Qe5 25.b6 ab6 26.Rc8 (26.Qb6?! Rc1 27.Rc1 Ne3=) 26...Rc8 27.Qb6+–) 25.Nf3 (25.b6 Ne4+–) 25...Ne4 26.h3 (26.Bc4 Rc5 27.Bb3 Rc1 28.Qc1 Rc8+=) 26...Ngf2 (better 26...Rc1!? 27.Qc1 Ng3 28.fg3 Qg3 29.Kh1 Qh3 30.Kg1 Qg3 31.Kh1 Re8–+) 27.Rf2= Qg3 28.Rg2 Qh3 29.Re1 Rfd8 30.Qe5 Re8 (better 30...Nc3!? 31.Rg3 Ne2 32.Re2 Rc1 33.Re1 Re1 34.Ne1 Qh4=+) 31.Qf4+– Kg7?? (better 31...Rc2+–) 32.Bf1+– f6 (32...Re6 33.Ng5 Ng5 34.Rg5 Rc1 35.Rc1 Qe3 36.Qe3 Re3+–) 33.Rg6!! (33.Rg6 Kg6 34.Bh3+–) 1–0. BeepBeepImAJeep (2535) – G0DZILLA (2665), lichess.org, 2017.

7.Nf3 Rc8 8.Be2 Bd6 9.0–0 e5 (9...dc4!? 10.bc6 Rc6=+) 10.d4= e4 11.Ne5 (11.Nh4 Be6 12.c5 Bb8=) 11...Qe7 (11...Qc7!?=+) 12.Nd7= Bd7 13.h3 (13.c5 Bc7=) 13...h5 (13...dc4 14.Bc4 cb5 15.Bb5=+) 14.Ba3 (14.c5 Bc7=) 14...Rh6 (14...dc4!? 15.Bc4 cb5 16.Bb5 0–0=) 15.Bd6+= Qd6 16.f4 (16.c5 Qe7 17.h4=) 16...ef3 (16...dc4 17.Bc4 cb5 18.Bb5=) 17.Rf3 Kf8 (17...dc4 18.Bc4 cb5 19.Bb5=) 18.Nd2 Re8 19.Qc1 Kg8 20.Qa3 Qe6 (20...Qa3 21.Ra3 g5 22.bc6 bc6 23.cd5 cd5 24.Bb5=) 21.Raf1 Rg6 22.Bd3 Rg5 (22...Rh6 23.Qc3+–) 23.Bf5 (better 23.h4!? Rg4 24.cd5 cd5 25.Bf5+=) 23...Qe7= 24.Qe7 Re7 25.Bd7 Rd7 26.c5 Re7 27.Kf2 h4 28.Rf4 Ne4 (better 28...Rh5!?=) 29.Ne4+– Re4 30.Re4 de4 31.Rb1 Rf5 32.Kg1 cb5 (better 32...Rd5+–) 33.Rb5 b6?? (33...Rf6 34.d5 Ra6+–) 34.c6 (34.cb6?! Rb5 35.ab5 ab6=) 34...Rb5 (34...Rf6 35.d5 a6 36.Rb2+–) 35.ab5 Kf8 36.c7 Ke7 37.c8Q f5 38.Qf5 g5 39.Qe4 Kd6 40.Qe5 (40.Qe5 Kd7 41.d5 a6 42.Qe6 Kc7 43.Qc6 Kd8 44.d6 ab5 45.Qc7 Ke8 46.Qe7) 1–0. BeepBeepImAJeep (2515) – IMAndrasToth (2445), lichess.org, 2017.

7.Nf3 Bd6 8.Be2 Rc8 9.0–0 0–0 10.d4 h6 11.Nc3 dc4 12.Bc4 Re8 13.Bd3 Bd3 14.Qd3 e5 15.de5 Ne5 16.Ne5 Be5 17.Rfd1 Qe7 (17...Qd3 18.Rd3 Ne4 19.Nd1=+) 18.h3 (better 18.Rac1!?=) 18...cb5–/+ 19.ab5 (19.Nd5 Nd5 20.Be5–/+) 19...Red8 (better 19...Qb4!? 20.Rdb1 Bc3 (20...Rc3?! 21.Bc3 Qc3 22.Qc3 Bc3 23.Ra7=) 21.Bc3 Rc3 22.Rb4 Rd3 23.Ra7 b6–+) 20.Qc2–/+ Rd1 21.Rd1 Qb4 (better 21...Bc3 22.Bc3 Qc5–/+) 22.Rc1?? (better 22.Qf5!? Re8 23.Qc2=) 22...Bc3 (better 22...Ne4! 23.Qe4 Qb2–+) 23.Bc3–/+ Qc4?? (better 23...Qb5!? 24.Qd1 Ne4–/+) 24.Qb2 (24.Qb1 Rc5 25.Bb2 Qb5 26.Rc5 Qc5 27.Bf6 gf6 28.Qb7 a5=) 24...Ne4 25.Bd2 Qe6 26.Rc8 Qc8 27.Be1 Qc4 28.f3 Nc5 29.Qb4 Qb4 30.Bb4 Nd3 31.Ba3 a6 32.Kf1 (32.ba6 ba6 33.f4 Ne1=) 32...ab5=+ 33.Ke2?? (better 33.Bd6=+) 33...b4–+ 34.Bb2 (34.Kd3 ba3 35.Kc3 b5–+) 34...Nb2 35.Kd2 (35.e4 Nc4–+) 35...Na4 (better 35...Nc4!? 36.Kd3 b3 37.g4–+) 36.Kd3 Nc5 37.Kc4 b3 38.Kc3 Kf8 39.e4 (39.g3 Ke7–+) 39...Ke7 40.f4 (40.Kb2 Nd3 41.Kb3 Nf4–+) 40...Kd6 (40...Ne4 41.Kb3 Kf6 42.g4–+) 41.g4 f5 (better 41...Ne4 42.Kb2 Nf2–+) 42.g5 (42.ef5 Kd5 43.g5–+) 42...fe4 43.h4 hg5 44.f5 Ke5 (44...gh4 45.Kd2 h3 46.f6 gf6 47.Kc1 Nd3 48.Kd2 h2 49.Ke2 h1Q 50.Ke3 Kc5 51.Ke2 Qe1) 45.h5 Kf5 46.h6 gh6 47.Kd2 Kf4 48.Ke2 g4 (48...b2 49.Kd2 b1Q 50.Kc3 Qc1 51.Kb4 Nd3 52.Kb3 b5 53.Ka2 Qb2) 49.Kd2 b2 50.Kc3 (50.Kc2 Na4 51.Kb3 b1Q 52.Ka4 e3 53.Ka5 e2 54.Ka4 e1Q 55.Ka3 Qeb4) 50...e3 (50...b1Q 51.Kc4 Qc2 52.Kb5 Na6 53.Kb6 Qc7 54.Ka7 g3 55.Ka8 Qb8) 51.Kc4 (51.Kb2 e2 52.Ka1 e1Q 53.Kb2 Qd2 54.Ka3 Qc3 55.Ka2 Qc2 56.Ka3 Qb3) 51...e2 52.Kd5 e1Q 53.Kd6 (53.Kc4 b1Q 54.Kc5 Qbb4 55.Kd5 Qee4) 53...Qe3 (53...Qe5) 54.Kc7 b1Q 55.Kc8 Qc2 (55...Qb6 56.Kb8 Qe8) 56.Kb8 (56.Kc7 Qe7 57.Kb6 Qd6 58.Kb5 Qa4) 56...Nd3 (56...Qe5 57.Ka7 Qa4 58.Kb6 Qd6) 57.Ka8 (57.Kb7 Qb2 58.Kc6 Qbb6 59.Kd5 Qbe6) 57...b6 (57...Qc8) 58.Kb8 (58.Kb7 Qe7 59.Kb6 Qb4 60.Ka6 Qca4) 58...Qc4 59.Kb7 ½–½. BeepBeepImAJeep (2505) – Ronnie30 (2310), lichess.org, 2019.

7.Nf3 Be7 8.Be2 0–0 9.Nd4 Bg6 (9...Be4 10.f3 Bb1 11.bc6=) 10.bc6+= bc6? (better 10...Qb6 11.Ba3 Ba3 12.cb7 Qb7 13.Na3 Nc5+=) 11.Nc6+– Qe8 12.Ne7 Qe7 13.Ba3 Nc5 (13...Qd8 14.Bf8 Qf8 15.cd5 Nd5 16.0–0+–) 14.d4 Nd3 (14...Nfe4 15.0–0 dc4 16.dc5 Rfd8+–) 15.Bd3 Qb4 (15...Qb7 16.Bg6 fg6 17.Bf8 Rf8 18.cd5 Nd5+–) 16.Bb4 Ne4 17.Bf8 Bf5 18.Bb4 (better 18.Ba3 dc4 19.Bc4 Rb8+–) 18...Ng3 19.hg3 Rb8 20.Bf5 h6 21.Be6! Rb7 (21...fe6 22.Bd6 Combination) 22.Bd5 Rc7 (22...Rd7 23.Rh6! gh6 24.Qg4 Kh8 25.Bf8 Rd5 26.Qg7) 23.Qf3 (23.Rh6 Rb7 24.Qg4 Rc7 25.Bf7 Rf7 26.Qc8 Rf8 27.Qf8) 23...Rd7 (23...g6 24.Qf6 Kh7 25.Bf8 Rc4 26.Qg7) 24.Nc3 (24.Rh6 gh6 25.Qg4 Kh8 26.Bf8 Rd5 27.Qg7) 24...Re7 (24...a5 25.Qe4 ab4 26.Qe8 Kh7 27.Be4 f5 28.Bf5 g6 29.Qg6 Kh8 30.Rh6 Rh7 31.Rh7) 25.Be7 g6 (25...Kh7 26.Qf7 a5 27.Be4 Kh8 28.Qe8) 26.Qf7 Kh8 27.Qg8 (27.Rh6) 1–0. BeepBeepImAJeep (2635) – batabat (2065), lichess.org, 2016.

7.Nf3 Be7 8.Be2 0–0 9.Nd4 Bg6 (9...Be4 10.f3 Bb1 11.bc6=) 10.bc6+= bc6? (better 10...Qb6 11.Ba3 Ba3 12.cb7 Qb7 13.Na3 Nc5+=) 11.Nc6+– Qe8 12.Ne7 Qe7 13.Ba3 Qd8 14.Bf8 Qf8 15.0–0 Rb8 (15...dc4 16.Na3+–) 16.Nc3 Qc5 (16...dc4 17.Bc4 Ne5 18.Qe2+–) 17.d4 Qc6 (17...Qb4 18.Na2 Qa5 19.Qe1 Qa4 20.Nc3+–) 18.c5 Ne4 (18...a6 19.a5+–) 19.Ne4 Be4 20.Bb5 Qc7 21.Rc1 Nf6 22.Qe2 Bf5 23.h3 h6 24.Bd3 Bd3 25.Qd3 Ne4 (25...Qc6 26.Rb1 Rf8 27.Qb5+–) 26.Rb1 Rc8 27.Rb2 (27.Qa6 Rb8+–) 27...Qa5 (27...e5 28.Rfb1+–) 28.Qb5 Qc3 29.Rfb1 Nd2 30.Rd1 Nc4 31.Rb3 (31.Rbb1 a5+–) 31...Nd6 (31...Qc2 32.Rbb1 a5+–) 32.Rc3 (32.Rc3 Nb5 33.ab5+–) 1–0. BeepBeepImAJeep (2560) – tns81 (2315), lichess.org, 2017.

7.Nf3 Be7 8.Be2 h6 9.Nd4 Bh7 10.bc6 Nc5?? (better 10...bc6 11.cd5 cd5=) 11.cb7+– Nb7 12.0–0 (12.cd5 e5 13.Nc6 Qd5 14.Ne5 0–0+–) 12...0–0 (12...dc4 13.Bc4 Nd6 14.Bb5 Nb5 15.ab5+– (15.Nb5?! a6 16.Nd4 Bd3=)) 13.Nc6 Qc7 14.Ne7 Qe7 15.Ba3 Nd6 16.cd5 (16.c5!? Nc4 17.Bc4 dc4+–) 16...Nd5+– 17.d4 Rfc8 18.Bf3 (18.Bc5 Rab8+–) 18...Qd7 (18...Rab8 19.Qe1 Nb6 20.Qe2+–) 19.Bd5 (19.Bd6!? Bb1 20.Bd5 ed5 21.Rb1 Qd6 22.Rb7+–) 19...ed5+= 20.Nd2 (20.Bd6 Qd6 21.Nd2 Rab8+=) 20...Bd3 21.Re1 Nc4 (21...Ne4 22.Ne4 de4 23.Bc5+=) 22.Nc4 Bc4 (22...dc4 23.Bc5+=) 23.Rc1 Rab8 24.Bc5 (24.a5 Rb5+=) 24...a5 (24...Bb3 25.Qf3+=) 25.Ra1 (25.Qd2 Qa4 26.Ra1 Qc6 27.Ra5 Qg6+–) 25...Bb3 Exerts pressure on the isolated pawn (25...Rb2 26.Ba3 Rb6 27.Qd2+–) 26.Qd2+– Ba4 27.Qa5 Bb5 28.Reb1 Bc4 29.Qc3 Kh7 30.h3 (30.Qc2 Kg8+–) 30...f6 (30...Rb1 31.Rb1 Qf5 32.Rb7+–) 31.Rb4 Qf5 32.Qb2 Rb4 (32...Ra8 33.Rb7 Qg6 34.Raa7+–) 33.Qb4 Qg6 34.Ra7 Bd3? (34...Rg8 35.Qb7+–) 35.f3 (better 35.Bf8 Rf8 36.Qf8+–) 35...Bf5 (35...Qg3 36.Qd2 Bf5 37.Qf2+–) 36.Kh2 Re8? (36...Be6 37.Qb6 Re8 38.Re7+–) (better 37.Bf8 Re3 38.Rg7 Qg7 39.Bg7 Kg7 40.Qb7 Kg6 41.Qd5+–) 37...Qg5 38.f4 (38.Re7!? Ra8 39.g4+–) 38...Qg6+= 39.Qf2 Be4 40.Ra2 Rb8 41.Rd2 Rb3 42.Re2 Rc3 43.Qg3 (43.Rb2 Kg8+=) 43...Qg3= 44.Kg3 f5 (44...h5 45.Bb4 Rb3 46.Bd6=) 45.Kf2+= g5 46.Rb2 Kg6 47.Bd6 Kh5 Black prepares the advance g4 48.Be5 g4 49.Kg3 (49.hg4 Kg4 50.Bg7 h5=+) 49...gh3 (49...Re3!? 50.Kf2 Ra3 51.hg4 fg4–/+ (worse 51...Kg4 52.Rb6=)) 50.Kh3= Re3 51.Kh2 Kg4 52.Rb6 Re2 53.Rg6 Kh5 54.Rg8 Kh4 55.Bf6 Kh5 56.Kh3 Re3 57.g3?? (better 57.Rg3 Rg3 58.Kg3=) 57...Re2–+ 58.g4 (58.Re8 Bg2 59.Kh2 Re8 60.Kg2–+) 58...fg4 59.Kg3 (59.Rg4 Bf5 60.Kg3 Bg4 61.Be5–+) 59...Re3 (59...Rg2) 60.Kf2–+ Rf3 61.Ke2 Rf4 62.Bg7 (62.Be5 Rf3 63.Bd6–+) 62...Rf6 (better 62...Rf7 63.Be5–+) 63.Rh8?? (better 63.Bf6 Bh7 64.Rh8+–) 63...Kh4 (better 63...Rg6 64.Be5 g3–+) 64.Bf6+– (64.Bf6 Kg3 65.Be5 Kh4 66.Rh6 Kg5 67.Rh8+–) 1–0. BeepBeepImAJeep (2620) – Ronnie30 (2305), lichess.org, 2017.

7.Nf3 Be7 8.Be2 h6 9.Nd4 Bh7 10.bc6 bc6 11.Nc6 (11.cd5 cd5 12.Nc6–/+) 11...Qb6=+ 12.Bf6 Bf6 13.Nd4 Bd4 14.ed4 Qd4 15.Nc3 (15.Na3 dc4 16.Rc1 Rc8=+) 15...dc4–/+ 16.Nb5 Qc5 (16...Qe5 17.Rc1 Nb6 18.0–0=+) 17.Bc4 (17.Rc1 Nb6 18.Bc4 0–0=+) 17...0–0 18.Be2 a6 19.Nc3 (19.Rc1 Qb4 20.Nc7 Ra7 21.Na6 Qd6–/+) 19...Rfd8–/+ 20.0–0 Ne5 21.Rc1 Qd4 22.Qb3 (22.a5 Nd3 23.Bd3 Bd3–/+) 22...Qd2 (22...Rab8 23.Qa2 Nc6 A) 24.Ba6? Nb4 (24...Qd2?! 25.Qd2 Rd2 26.Rfd1=) 25.Qc4 Na6 26.Qa6 Bd3–+ (26...Qd2?! 27.Rfd1 Qg5 28.Rd8 Rd8 29.Rd1=); B) 24.a5–/+) 23.Rfd1 (23.Rcd1!? Qf4 24.Rd8 Rd8 25.Qb6=) 23...Qg5–/+ 24.h3 (24.Ba6 Nf3 25.Kh1 Nh2 (25...Ra6?! 26.Qb7 Rad6 27.Qf3=) 26.Kh2 Ra6–/+) 24...Bf5 25.Kh2 Qf4 26.Kg1 Rab8 (26...Bd3 27.a5–/+) 27.Rd8 Rd8 28.Rd1 Rd1 (28...Nd3 29.Qb6 Rd7 30.a5–/+) 29.Nd1 Qg5?? (29...Nd7!?–/+) 30.Ba6?? (better 30.Qb8 Kh7 31.Qe5+–) 30...Ng6 31.Bf1 Nf4 32.Kh2 h5 (32...Qd8 33.Ne3 Bg6 34.g3=) 33.Ne3 h4 (33...Be4 34.Qb5 Qf6 35.a5+=) 34.Qb8 (34.a5 Be4 35.Qb8 Kh7+–) 34...Kh7 35.a5 f6?? (better 35...Bd3 36.Bd3 Nd3+=) 36.a6 (better 36.Nf5 Qf5 37.a6 Nh3 38.a7 Nf2 39.Be2+–) 36...e5?? (36...Be4 37.a7 Bc6+–) 37.a7 (better 37.Nf5 Qf5 38.a7+–) 37...Bh3 (37...Be4 38.Ba6 f5+–) 38.gh3 Nh5 39.a8Q Qf4 40.Kh1 Ng3 41.fg3 Qg3 (41...Qe4 42.Qe4 f5 43.Qh4 Kg6 44.Qe8) 42.Qg2 (42.Qh8 Kg6 43.Qe4 Kf7 44.Bc4 Ke7 45.Nf5 Kd7 46.Qb7) 42...Qe3 (42...f5 43.Qd5 Qf3 44.Qf3 g6 45.Nf5 gf5 46.Qf5 Kh6 47.Qbf8) 43.Qb1 (43.Qe8 Qh6 44.Qe4 f5 45.Qf5 g6 46.Qef7 Qg7 47.Q5g6 Kh8 48.Qgg7) 43...f5 (43...e4 44.Qb7 Qg3 45.Qbe4 f5 46.Qf5 g6 47.Qf7 Kh6 48.Qf8 Kh5 49.Be2 Kg5 50.Qd5 Qe5 51.Qe5) 44.Qbe4 (44.Qf5 g6 45.Qgg6 Kh8 46.Qff6) 44...Qe4 (better 44...fe4!? 45.Qg4 Qe1 46.Qh5 Kg8+=) 45.Qe4+– fe4 46.Kg2 Kh6 47.Kf2 g5 (47...Kg6 48.Ke3+–) 48.Ke3 g4 (48...Kg6 49.Be2+–) 49.hg4 Kg5 50.Bh3 1–0. BeepBeepImAJeep (2635) – MajinBo (2505), lichess.org, 2016.

7.Nf3 Bg6 8.Be2 Be7 9.0–0 0–0 10.d4 h6 (10...Rc8 11.Nbd2=) 11.Nbd2 Bh7 12.cd5 cd5 13.Rc1 Rc8 14.Qb3 Ne4 (14...Qa5 15.Bc3 Qc7 16.Bb4 Qc1 17.Be7=) 15.Ne4 Be4 16.Nd2 Bh7 17.h3 (17.Rc8 Qc8 18.Rc1 Qb8+=) 17...Bd6 (17...Qa5 18.Bc3 Qc7 19.a5=) 18.Nb1 (18.Rc8 Qc8 19.Rc1 Qb8+=) 18...Qe7 (18...Qg5 19.Nd2=) 19.Nc3 (19.Ba3 Ba3 20.Qa3 Qg5=) 19...f5 (19...Bf5 20.Bf3=) 20.f4= Nf6 21.Bf3 (21.Rc2 Rc7=) 21...g5 22.g3 (22.fg5 hg5 23.Qd1 Qg7–/+) 22...gf4 (22...g4 23.hg4 fg4 24.Bg2=+) 23.ef4 Kh8 (23...Ne4 24.Ne4 fe4 25.Bg2=) 24.Kh2 Rg8 25.Ne2 Ne4 26.Be4 (26.Qe3 Bg6=) 26...fe4= (worse 26...de4 27.Qe6 Bg6 28.d5 Kh7 29.Qc8 Rc8 30.Rc8+–) 27.Qe3 Qf6 (27...Bf5 28.Rfe1=) 28.Ba3 Ba3 29.Qa3 Bf5 30.Qd6 Qg6 (30...Qf7 31.g4 Bg6 32.f5 ef5 33.Rc8 Rc8 34.gf5+–) 31.Qe5 (31.g4 Bg4 32.Rc8 Rc8+–) 31...Kh7 32.g4 e3?? (better 32...Bg4 33.Rg1 Rc1 34.Nc1 Qf5 35.hg4 Rg4 36.Qf5 ef5+–) 33.Rc8+– Rc8 34.gf5 Qf5 35.Qf5 (35.Qe3 Rc2+–) 35...ef5 36.Kg2 Rc2 (36...Kg6 37.Rc1 Rc1 38.Nc1+–) 37.Kf3 Rc3 (37...Rc4+–) 38.Nc3 1–0. BeepBeepImAJeep (2625) – MajinBo (2515), lichess.org, 2016.

6.b5 Be7

7.Nf3 0–0 8.Nd4 Bg6 9.Be2 c5 10.Nf3 Nbd7 11.0–0 h6 (11...dc4 12.Na3=) 12.d4 dc4 13.Bc4 Nb6 14.Nbd2 Nc4 15.Nc4 Nd5 16.Nfe5 Bh7 17.dc5 Bc5 18.Qf3 (18.Bd4 Be7=) 18...Qc7 (18...f6 19.Qh3 Bf5–/+ (worse is 19...fe5 20.Qe6 Kh8 21.Ne5+=)) 19.Rfd1 f6 20.Nd3 Be7 (20...Bd3 21.Rd3 a6 22.Rad1+=) 21.Rac1+/– Rac8 (21...Rad8 22.Bd4+/–) 22.Qg4 (22.e4!? Nb6 23.Ne3+/–) 22...Bf5+= 23.Qf3 Bg6?? (better is 23...Bh7=) 24.Nce5+– fe5 25.Rc7 Rf3 (25...Rc7 26.Qg3 Bd3 27.Qe5 Rf6+–) 26.Rc8 Rf8 27.Rf8 Bf8 28.Ne5 Bc2 29.Rd4 Bd6 30.Rc4 Bb3 31.Rc8 Kh7 32.Ra8 Be5 (32...Ba4 33.Ra7 Bb5 34.e4+–) 33.Be5 Ba4 (33...Nb6 34.Ra7 Bd5+–) 34.Ra7 Bb5 35.Rb7 Be8 (35...Bd3 36.Rg7 Kh8 37.f3 Ne3 38.Rd7 Kg8 39.Rd3+–) 36.g4 (36.g4 Kg8 37.Rg7 Kf8 38.Rh7+–) 1–0. Riegler,Johannes – Westermayer,Johann (1910), Vienna–ch, 2004.

7.Nf3 0–0 8.Be2 Nbd7 (8...dc4 9.Bc4 Bd3 10.Qb3 Bc4 11.Qc4=+) 9.0–0 Rc8 (9...dc4 10.bc6 Qb6 11.Ba3=) 10.d3= h6 (10...dc4 11.dc4 Nc5 12.Nd4=) 11.Nbd2 Re8 (11...dc4 12.Nc4 Nd5 13.e4+–) 12.d4 (12.Nd4 Bg6=) 12...Bh7 (12...dc4 13.Nc4 Nd5 14.Qb3=) 13.Ne1 (13.Ba3 c5=) 13...Qc7 (13...dc4 14.Bc4 Nb6 15.Be2=) 14.f4 (14.c5 b6=+) 14...Ne4 15.Ne4 Be4 16.Bd3 (16.c5 b6=+) 16...Bd3=+ 17.Qd3 Nb6 18.c5 Nc4 19.Bc3 (19.Rb1 b6=+) 19...b6 20.cb6 ab6 21.Bd2 (21.e4 cb5 22.ab5 Nd6–/+) 21...Bf6 (21...cb5 22.ab5 Qd7 23.Rb1–/+) 22.Nf3 cb5 23.ab5 Nd2 (23...Qd7!?=+) 24.Qd2= Qc4 25.Rfb1 Ra8 26.Qb2 Rec8 27.Ra8 Ra8 28.Rc1 Ra2?? (28...Qd3 29.Re1 Ra5–/+) 29.Qb1+– (29.Rc4 Rb2 30.Rc8 Kh7–/+) 29...Rg2 30.Kh1 Rh2 31.Nh2 (31...Qc1 32.Qc1+–) 1–0. Rohrbacher – Reer, 3.Dt.Sen–ch, 1991.

7.Nf3 0–0 8.Be2 Nbd7 9.Nd4 cb5 10.Nf5 ef5 11.cb5 Ne5?? (better 11...Rc8=) 12.0–0 (12.0–0 Qd6 13.Bd4+=). BeepBeepImAJeep (2785) – toots1 (1985), lichess.org, 2016.

7.Nf3 0–0 8.Be2 Nbd7 9.Nd4 Bg6 (9...Be4 10.f3 Bb1 11.bc6=) 10.bc6+= bc6? (better 10...Qb6 11.Ba3 Ba3 12.cb7 Qb7 13.Na3 Nc5+=) 11.Nc6+– Qe8 12.Ne7 Qe7 13.Ba3 Nc5 (13...Qd8 14.Bf8 Qf8 15.cd5 Nd5 16.0–0+–) 14.d4 Rfc8 (14...Nfe4 15.0–0 dc4 16.dc5 Rfd8+–) 15.Bc5 (worse 15.dc5 dc4 16.Qd4 Rab8+–) 15...Qb7 (15...Qd8 16.Nd2+–) 16.0–0 (16.Nd2!? Nd7 17.cd5 Nc5 18.dc5 ed5+–) 16...dc4 17.Bc4 (better 17.Nc3 a6+–) 17...Nd5 (17...Nd7+–) 18.Bd5 (18.Qf3 Rc7+–) 18...Qd5 19.Nd2 (19.Nc3 Qg5+–) 19...Qg5 20.Nf3 Qh5 (20...Qd5 21.Rc1+–) 21.Ne5 Qh6 (21...Qf5 22.Re1+–) 22.Ng6 hg6 (22...Qg6 23.Qf3+–) 23.Rb1 a6 24.Qf3 Rab8 (24...Qh5 25.g4 Qd5 26.Qd5 ed5 27.Rb7+–) 25.Rb7 Qg5 (25...Rb7 26.Qb7 Rd8+–) 26.Qf7 (26.Qf7 Kh7 27.Qg7) 1–0. BeepBeepImAJeep (2475) – Barron123 (2445), lichess.org, 2019.

7.Nf3 0–0 8.Bf6 Bf6 (8...gf6?! 9.Nd4=) 9.d4 c5 –/+.

7.Nf3 Bb1 (7...0–0!?=+) 8.Rb1= 0–0 9.Be2 Nbd7 (9...cb5 10.Bf6 Bf6 11.cd5 Qd5 12.Rb5+=) 10.0–0 (10.bc6 bc6 11.0–0 Rb8+=) 10...Rb8 (10...cb5 11.cd5 Nd5 12.Bb5=) 11.d4 h6 12.Rc1 Nh7 13.Qb3 Ng5 14.Rfd1 (14.Ng5 Bg5 15.cd5 ed5+–) 14...f5 (14...Nf3 15.Bf3 Bd6 16.c5+=) 15.Ne5 (15.Ng5 Bg5 16.Ba3 Be7+–) 15...Ne5+= 16.de5 Kh8 (16...Rc8 17.Bd4+=) 17.Ba3 (17.Bd4 Qa5+–) 17...Ba3+= 18.Qa3 Re8 (better 18...Qa5+=) 19.Bh5 (19.cd5 cd5 20.Qb4 Rf8+=) 19...Rf8 (better 19...Nh3! 20.gh3 Qg5 21.Bg4 fg4=+) 20.cd5+= cd5 21.Qc5 (21.Qb4 Ne4 22.Be2 Rc8+=) 21...b6 (21...Ne4 22.Qa7 Qh4 23.Bf3 Qf2 24.Kh1=+) 22.Qc7 (22.Qb4+=) 22...Ra8 (22...Nh3 23.gh3 Qg5 24.Kh1 Qh5=) 23.f3?? (23.Qd8 Rfd8 24.Rc6 Rac8+–) 23...Nh7?? (better 23...Nh3! 24.gh3 Qg5 25.Kf2 Qh5=+) 24.Qd8 Rfd8 25.Rc7 Rdc8 (25...a6 26.Rc6 Nf8 27.Bf7 (27.Rb6?! ab5 28.ab5 Rdb8 29.Rb8 Rb8+=) 27...ab5 28.ab5+–) 26.Rdc1 Rc7 27.Rc7 Nf8 28.f4 (28.Bf7!? h5+–) 28...g6+– 29.Bf3 a6 (29...a5 30.g4+–) 30.Be2 (30.Rb7 ab5 31.ab5 Ra4+–) 30...a5 31.Rc6 Rb8 32.g4 h5? (better 32...Kg8!?+–) 33.gh5+– gh5 34.Bh5 Kg7 (34...Rb7 35.Bf3+–) 35.Rc7 Kh6 36.Be2 (36.Bf7 d4 37.Kf2 d3+–) 36...Kg6 37.Kf2 (better 37.Bf3 Kh6+–) 37...Nh7? (37...Rd8+–) 38.Bh5! Kh5 39.Rh7 Kg4 (39...Kg6 40.Re7+–) 40.Re7 (40.h3) 40...Rh8+– 41.Kg2 (41.Re6?! Rh2 42.Kg1 Re2+=) 41...Rc8 42.h3 Kh4 (42...Kh5 43.Re6 Rc2 44.Kf3 Rh2+–) 43.Rh7 1–0. BeepBeepImAJeep – sella (1735), lichess.org, 2018.

5.cd5 ed5

6.a3 a5 7.b5 c5 8.Qf3 Ne7 9.Nc3 a4=.

6.a3 a6 7.Nf3 Nf6 8.Nd4 Bg6 9.Be2 a5=.

6.a3 Bd6 7.Nf3 Nf6 8.Be2 Nbd7 9.0–0 0–0 10.d3 Bg4 11.h3 Bf3 12.Bf3 Be5 13.Nc3 Rc8 14.Rc1 Bb8 15.Na4 b5 16.Nc5 Nc5 17.Rc5 Nd7 18.Rc2 Qc7 19.g3 Ne5 (19...Qd6 20.Bg2+=) 20.Bg2 (better is 20.Bd5 Qd8 21.Be4+–) 20...f5? (20...Qe7 21.f4 Nd7 22.Bd4+/–) 21.Qh5?? (better is 21.Bd5!? Kh8 22.Be5 Qe5 23.Bc6+–) 21...Qf7 (21...Qe7!? 22.Be5 Qe5+=) 22.Qf7+/– Rf7?? 23.Rfc1 Nd3+= 24.Rd1 Nb2+= 25.Rb2 Be5 26.Rc2 Rd7 27.Bd5 Rd5?? 28.Rd5+– cd5 29.Rc8 Kf7 30.Rc5 a6 31.Rd5 Bb2 32.Rf5 Ke6 33.Rc5 Ba3 34.Rc6 Kf5 35.Ra6 Bb4 36.Rb6 Bc3 37.Rb5 Ke4 38.Kg2 h6 39.g4 Bf6 40.Rb3 Kd5 41.f4 Ke4 42.Kg3 Be7 43.h4 Bc5 44.Kf2 g5 45.hg5 hg5 46.f5 Kd5 47.Rd3 Ke4 48.Rb3 Kd5 49.Kf3 Kc4 50.Rb8 Kd5 51.Re8 Kd6 52.f6 Kd7 53.f7 Kc7 54.f8Q Bf8 55.Rf8 Kd7 56.Rf5 Ke6 57.Rg5 Kf6 58.Rg8 Kf7 59.Ra8 Kg7 60.g5 Kg6 61.Kg4 (61.Kg4 Kh7 62.Ra7 Kg8 63.g6 Kf8 64.Kf5 Kg8 65.Kf6 Kf8 66.Ra8) 1–0. Fournier,Frederic (1730) – sagitigre14 (1965), Active, 2004.

6.a3 Nd7 7.Nf3 Ngf6 8.Be2 Bd6 9.Nd4 Be6=.

6.a3 f6 7.Nf3 Bd6 8.Nh4 Be6 9.Qh5 Bf7=.

6.a3 Nf6 7.Qf3 Be4 8.Bf6 gf6 9.Qd1 Bd6=.

6.a3 h6 7.Nf3 Nf6 8.Nd4 Bg6 9.Be2 a5=.

6.b5 a6 (6...Nf6 7.Qf3 Be4 8.Bf6 gf6 9.Qd1 Rg8=) 7.bc6 Nc6 8.Nf3 Rc8 9.Nc3 Nf6+=.

6.Bd4 Nf6 (6...Nd7) 7.Qf3 Be4 8.Qg3 Nbd7 9.a3 a5+=.

6.Be2 Nf6 7.a3 Bd6 8.Nf3 0–0 9.0–0 a5=.

6.Ne2 Nf6 7.b5 Bd6 8.Ng3 Bg6 9.Be2 0–0+=.

6.Ne2 Nf6 7.Ng3 Be6 8.a3 Nbd7 9.Be2 Bd6 10.0–0 h5 11.Qc2 (11.Nh5 Nh5 12.Bh5 Qh4 13.Bf7 Ke7–+) 11...g6 12.Re1 Bg3 13.fg3 Qe7 14.Rf1 Rh6? (14...Bf5 15.Qa4+=) 15.Nc3 White prepares the advance b5 (better 15.Ba6! Bf5 16.Rf5 gf5 17.Bb7+–) 15...h4= 16.e4 (better 16.gh4!? Rh4 17.b5=) 16...hg3=+ 17.hg3 0–0–0 18.b5?? (better 18.ed5 Nd5 19.Rae1–/+) 18…Qc5–+ (18...Qc5 19.d4 Qd4 20.Rf2 Rdh8–+) 0–1. Burns,Chris – Cooper,Dave, NZL A Grade Ch Wanganui Chess Club New, 1999.

6.Nf3 Bb4 7.Bg7 Bb1 8.Rb1 +– (8.Bh8?! Be4+–).

6.Nf3 Nd7 7.Be2 Ngf6 8.a3 Bd6 9.d4 0–0=+ 10.0–0 Re8 11.Nbd2 h6 (11...Qe7 12.Nb3=+) 12.Re1 a6 13.Rc1 Rc8 14.Nb3 Bb8 (14...Qc7 15.Nc5=) 15.Bd3 (15.Nc5 Qc7=) 15...Bd3 16.Qd3 Qc7 (16...Nb6 17.Nc5 Nc4 18.Rc2=) 17.h3 (17.Nc5 Nb6=) 17...Nb6 18.Nbd2 Ne4 19.Nf1 (19.Rc2 Nd2 20.Qd2 Nc4=+) 19...Nc4 20.Rc2 Qe7 21.N1d2 Ncd6 (21...Ncd2 22.Nd2 Nd2 23.Qd2=+) 22.Qe2 (22.Nb3 Rcd8=) 22...Nf5 (22...Bc7 23.Rec1=+) 23.Ne4 Qe4 24.Ne5 (24.Rec1 Qe6=) 24...Be5=+ 25.de5 Re6 (25...Nh4 26.f3 Qg6 27.Rec1=+) 26.Rd2 Rg6 27.f3 Qh4 28.Qf1? (28.e4 de4 29.fe4 Ng3=) 28...Qg3 (better 28...Qh3! 29.g4 Qh4–/+) 29.Kh1=+ Re8 30.Qf2 Ree6 31.Qg3 Rg3 (31...Ng3!? 32.Kg1 h5=) 32.e4+= Ne7 (32...de4 33.Re4 Kf8 34.Kh2+=) 33.f4 (33.Kh2 Rgg6+–) 33...Reg6 (33...f5 34.Kh2 Rb3 35.ed5 Nd5 36.Bc1=) 34.Bd4 (better 34.f5!? R6g5 35.e6 fe6 36.fe6+=) 34...de4=+ (worse 34...Ra3 35.Bc5 Re6 36.Be7 Re7 37.ed5 cd5 38.Rd5=) 35.Re3? (35.Ra2 Rd3 36.Re4 Rgg3=+) 35...Nd5 (35...Re3 36.Be3 Nd5–+) 36.Rg3? (better 36.Re4 Ra3 37.f5=+) 36...Rg3–+ 37.Re2 Nf4 (37...Ra3!? 38.Re4 Ra4 39.Bc5–+) 38.Re4 Ne6 (38...Nd5 39.e6 fe6 40.Re6–+) 39.Re3 Rg6 40.Rd3 (40.Re4 Kf8 41.Bb6 Ke7–/+) 40...Nf4 41.Rd2 Re6 (41...Rg3 42.Bc5–/+) 42.Kh2 (42.Be3 Nd5 43.Bd4 Kf8–/+) 42...Nd5 (42...Ng6 43.Ba1–/+) 43.g4 Kf8 (43...Nf4 44.Bb2 Re7 45.Kg3–/+) 44.Kg3 Ke8 45.h4 Kd7 46.Rf2 Ke8 47.h5 (better 47.Rd2!?=) 47...Nc7–/+ 48.Bb2 Re7 49.Rf3 (49.Rd2 Ne6–/+) 49...Ne6 50.Rd3 Rd7 51.Re3 (51.Rd7 Kd7 52.Kf3 b6–/+) 51...Rd1 (51...Rd2 52.Rb3–/+) 52.Re2 (52.Kf3 b6–/+) 52...Ke7 53.a4 (53.Rc2 Rd3 54.Kf2 Rh3–+) 53...Rg1 (better 53...Rd3 54.Kf2 Rb3–+) 54.Kh4? (54.Rg2 Re1–+) 54...Rh1?? (better 54...Nf4 55.Rf2 g5 56.hg6 fg6 57.Rf4 g5 58.Kh5 gf4–+) 55.Kg3–/+ Rd1 56.Kf2 (56.a5 Rd3 57.Kf2 Rb3–+) 56...Rd3 (56...Nf4 57.Rc2–+) 57.Re3 (57.a5 Rb3 58.Bc1 c5 (58...Rb4?! 59.Ba3 c5 60.Bb4 cb4 61.Rb2=) 59.bc5 Nc5–+) 57...Rd5 (57...Nf4 58.Kf3 Re3 59.Ke3 Nd5 60.Ke4 Nb4 61.Bd4–+) 58.Bc3 Ng5 (58...b6 59.Ke2–/+) 59.e6 (59.a5!?–/+) 59...f6 60.b5? (60.a5 Ne6 61.Kf3 Kd6–+) 60...Ne6 (better 60...ab5!? 61.ab5 Rb5 62.Ke2–+) 61.bc6 bc6 62.Bb4 (62.Ke1 Kd6–+) 62...c5 (62...Kf7 63.a5–+) 63.Bc3 Kd7 64.Kf3 (64.a5 Kd6–+) 64...Rd1 (better 64...Kd6 65.Ke4–+) 65.Ba5? (65.a5–+) 65...Ra1 66.Rb3 (66.Bc3 Ra4 67.Rd3 Kc6 68.Bd2–+) 66…Nd4 (66...Nd4 67.Kf2 Nb3–+) 0–1. Melzig,Ernst – Walther,Henry, Bad Sooden Seniors op, 2003.

6.Nf3 Nf6 7.a3 Bd6 8.Be2 a5 9.b5 0–0=.

6.Nf3 Nf6 7.b5 Be7 8.a4 0–0 9.Be2 c5 10.d3 Nbd7 11.0–0 Bd6 12.e4 Bg4 13.e5 (better 13.h3!? Bf3 14.Bf3=) 13...Bf3–/+ 14.ef6 Nf6?? (better 14...Be2 15.Qe2 Nf6–/+) 15.Bf3+– (15.gf3 Nh5 16.f4 Nf4–+) 15...Rb8 (15...Re8 16.a5+–) 16.Re1 d4 17.Nd2 Qc7 18.g3 Rfe8 19.Re8 Re8 20.Nc4 White plans a5 20...Bf8 21.a5 b6 (21...a6 22.b6 Qe7 23.Bg2+–) 22.ab6 (22.Bc1 Re6+–) 22...ab6 23.Ra6 Nd7 24.Bc6 Re7 (24...Re6 25.Bc1 Nb8 26.Rb6 Nc6 27.bc6 Rc6 28.Bf4+–) 25.Bd7 (25.Bc1 Re6 26.Bf4 Qd8+–) 25...Qd7 26.Rb6 Qe8 27.Qf3 Re2 28.Kg2 g6 (28...Re1 29.Rc6+–) 29.Rc6 Qa8 (29...Re1+–) 30.Rg6! (30.Rg6 fg6 31.Qa8+–) 1–0. GuestVLCG – GuestBJGX, freechess.org, 2018.

6.Qh5 Bg6 (6...Nh6 7.a3 Nd7 8.Nf3 a5 9.b5 Rc8+=) 7.Qe5 Ne7 8.Nf3 Nd7 9.Qc3 a5+=.

5.Nf3 Nd7

6.Qb3 Ngf6 7.Nc3 Be7 (7...Bd6 8.Nd4 Be4 9.Ne4 de4 10.d3=) 8.Nh4 Bg6 (8...Be4 9.Ne4 de4 10.g3–/+) 9.c5 (9.Ng6 hg6 10.cd5 ed5=) 9...0–0 (9...Bh5 10.Qc2=+) 10.Ng6= fg6 11.f3 (11.e4 Ne5=) 11...a5 (11...e5 12.e4 Nb8 13.Be2=) 12.d4=+ b6 (12...ab4 13.Qb4 b6 14.Na4=+) 13.a3 (13.cb6 ab4 (< 13...Nb6 14.Ba3=; 13...Bb4?! 14.b7 Rb8 15.a3=) 14.b7 bc3 15.ba8Q cb2 (< 15...Qa8 16.Qc3 c5 17.a4+–) 16.Qb2 Qa8–+) 13...ab4=+ 14.ab4 Ra1 15.Ba1 bc5 (15...e5 16.de5 Ne5 17.cb6 Qb6 18.Nd5 Nf3 19.gf3 Nd5 20.Bd4 Bb4 21.Kd1–/+) 16.bc5= Qa5 (16...e5 17.Bd3=) 17.Bb2 (17.Qa4 Qc7=) 17...Rb8 (17...e5 18.Bd3=) 18.Qc2 (18.Qa4 Qd8 19.Bc1 Qc7+=) 18...e5 19.Kf2 (19.Qa4 Qc7 20.Bc1 ed4 21.ed4 Re8=) 19...ed4 (19...Qb4 20.Nd1=+) 20.ed4 Qb4 21.Nd1 Nh5 22.Qc3 Bf6=+ 23.Qb4 Rb4 24.Bc3 Bd4–+ 25.Bd4 Rd4 26.Be2 Nc5 27.Ne3 Nf4 28.Rc1?? Ncd3 29.Bd3 Nd3 30.Ke2 Nc1 (31.Ke1 c5–+) 0–1. Lantzsch,Christian – Osswald,Marco, Rheinhessen–ch H2 op, 1997.

6.Qb3 Ngf6 7.Nd4 Be4 =+.

6.b5 Qb6 7.Nh4 dc4 8.Nf5 ef5 9.Bc4 cb5 10.Bd3 Ne7 11.0–0 Nc5 12.Be2 a6 13.Nc3 Qe6 14.Rc1 Ne4 15.Ne4 (15.a4 ba4 16.Qa4 Nc6 17.Ne4 fe4+=) 15...fe4 16.a4 (16.f3 ef3 17.Bf3 Qa2=) 16...ba4 (16...Qa2 17.Rc2 Qa4=+ (17...ba4?? 18.Bc4 Qb2 19.Rb2+–)) 17.Qa4+= Nc6 18.f3 ef3 (better 18...Rd8!? 19.Rc2 f5+=) 19.Bf3+– (19.Rf3?! f6=) 19...f6?? (better 19...Rb8+–) 20.Bc6 bc6 21.Rc6 Qd7 22.Rf4 Qd3 (22...Bd6 23.Rd4 0–0 24.Rdd6 Qf5+–) 23.Rc8 (23.Rc8 Ke7 24.Qe8 Kd6 25.Rc6 Kd5 26.Qe6) 1–0. pcmvr – iozeph, net–chess.com, 2018.

6.b5 dc4 A) 7.Bc4 cb5 (7...Ne7 8.0–0 a6 9.ba6 b5 10.Be2 Ra6 11.Nc3 Ra7 12.d3 Nb6=; 7...Nb6 8.Be2 Ne7 9.Nc3 Bd3 10.Bd3 Qd3 11.Ne5 Qd6 12.Qh5 Ng6=; 7...Ngf6 8.0–0 cb5 9.Bb5 a6 10.Bf6 gf6 11.Be2 Bd6 12.d4 Rc8=) 8.Bb5 a6 9.Be2 Rc8 10.d3 Qb6 11.Bc3 e5 12.0–0 Qd6=; B) 7.Na3 cb5 (7...c3 8.dc3 cb5 9.Bb5 Rc8 10.Bd7 Qd7 11.Qd7 Kd7 12.Nb5 Bc5=; 7...Be4 8.bc6 Bc6 9.Nc4 Ngf6 10.Rc1 Bd5 11.Be2 Be7 12.0–0 0–0=; 7...Nc5 8.bc6 bc6 9.Nc4 Qd5 10.d4 Ne4 11.Qa4 Rb8 12.Ba3 Ba3+=) 8.Nb5 Nc5 9.Be5 f6 10.Nc7 Ke7 11.Na8 fe5 12.Ne5 Qa8=; C) 7.bc6 bc6 (7...Nc5 8.cb7 Rb8 9.Bc4 Rb7 10.Bd4 Nf6 11.Nc3 Bd6 12.Bb5 Kf8+/– 1.00) 8.Bc4 Rb8 9.Bd4 Nb6 10.Be2 Nf6 11.Nc3 Bd6 12.Ne5 Rc8=.

6.b5 c5 7.Be2 (7.d4 Ngf6 (7...Ne7 8.Nc3 Rc8 9.cd5 Nd5 10.Nd5 ed5 11.dc5 Nc5 12.Nd4 Qa5+=; 7...cd4 8.Qd4 Ngf6 9.cd5 Nd5 10.e4 Nb4 11.Na3 Bg6 12.Bc3 Qa5+=; 7...Rc8 8.cd5 ed5 9.dc5 Nc5 10.Be2 Bb1 11.Qb1 Qa5 12.Kf1 Ne4=) 8.Nc3 Rc8 9.cd5 Nd5 10.Nd5 ed5 11.dc5 Nc5 12.Nd4 Qa5+=; 7.d3 Ngf6 (7...a6 8.Nc3 Qa5 9.Qd2 dc4 10.dc4 Rd8 11.Rd1 Ne7 12.e4 Bg4+=; 7...dc4 8.dc4 Ndf6 9.Qa4 Qb6 10.Be2 Be7 11.0–0 Nh6 12.Nc3 0–0=; 7...Qa5 8.Qd2 Qd2 9.Nbd2 Ngf6 10.Nh4 Bg6 11.Ng6 hg6 12.Be2 Bd6=) 8.Nh4 Bg4 9.Be2 Be2 10.Qe2 a6 11.ba6 Ra6 12.cd5 Nd5+=; 7.Nc3 Ngf6 (7...Nb6 8.cd5 ed5 9.a4 d4 10.ed4 cd4 11.Qe2 Ne7 12.Ne4 Qd5=; 7...Ndf6 8.d4 Rc8 9.cd5 ed5 10.dc5 Bc5 11.Bd3 Nh6 12.0–0 0–0+=; 7...dc4 8.Bc4 Ngf6 9.0–0 Bd6 10.d3 Nb6 11.Re1 Bg4 12.h3 Bh5=) 8.d4 Rc8 9.cd5 Nd5 10.Nd5 ed5 11.dc5 Nc5 12.Bd4 Qa5=) 7...h6 (7...dc4 8.Na3 Ngf6 9.Nc4 Be7 10.0–0 0–0 11.d4 Be4 12.Bd3 Rc8=; 7...Ngf6 8.0–0 dc4 9.Na3 Be7 10.Nc4 0–0 11.d3 a6 12.Qb3 Nb6=; 7...Nb6 8.Na3 dc4 9.Nc4 Nc4 10.Bc4 Nf6 11.Rc1 Bd6 12.0–0 0–0=; 7...a6 8.ba6 ba6 9.0–0 Ngf6 10.cd5 ed5 11.Qa4 Be7 12.Nc3 0–0=) 8.0–0 Ngf6 9.d4 dc4 10.dc5 (10.Nbd2 c3 11.Bc3 Rc8 12.Qa4 Nd5+=) 10...Bc5 (10...Rc8 11.Nbd2 Bc5 12.Nc4 0–0=) 11.Bc4 (11.Nbd2 0–0 12.Nc4 Rc8=) 11...0–0 (11...Rc8 12.Nbd2 Nb6=) 12.Nc3 (12.Qe2 Rc8=) 12...Nb6 13.Qd8 Rad8 14.Be2 Nfd5 15.Nd5 Rd5 16.a4 Bd3 17.Bd3 Rd3 18.Bd4 (18.a5 Nd5 19.Rfc1 b6+=) 18...Bd4 19.Nd4 Rc3 20.a5 Nd5 21.a6 Rc7 22.ab7 Rb7 23.Rfc1 Nc7 Exerts pressure on the isolated pawn 24.Rc5 a6 25.ba6 Na6 26.Rca5 Nc7 27.g3 Rfb8 28.Nc6 Rb1 29.Rb1 Rb1 ½–½. Kamaletdinov,Farit (1970) – Sadirova,Madina, Astrakhan Open, 2011.

6.c5 a6 7.d4 Ngf6 8.Nc3 h6 9.Bd3 Ne4 10.0–0 Bg6 11.Ne1 f5 12.f3 Nef6 13.a4 Be7 14.b5 0–0 15.b6 e5 16.f4 ed4 17.ed4 Ne4 18.Nf3 Bf6 19.g3 (19.Qc2!?+=) 19...Nc3 20.Bc3 Nc5 21.Bb4 Nd3 22.Bf8 Nf4 (worse is 22...Kf8 23.Qd3 Qb6 24.Ne5+=) 23.gf4 Kf8 24.a5 Bh5 25.Qd2 (25.Rc1!?+=) 25...Bf3–+ 26.Rf3 c5! 27.dc5?? (better is 27.Re1 Bd4 28.Kh1–+) 27...Ba1 28.Rf1 Bf6 0–1. cmulligan (2255) – iozeph (2570), net–chess.com, 2011.

6.Nd4 Bb4?? 7.Nf5 ef5 8.Bg7 +–.

6.Nd4 Bg6 7.cd5 cd5 8.f4 Ngf6 9.b5 (9.Qa4 a5+=) 9...Bd6 (9...Ne4 10.Qg4+=) 10.Be2 e5 (10...0–0 11.0–0+=) 11.fe5= Be5 12.0–0 Qb8 13.h3 Ne4 14.Bf3 (14.Rf3 Bh5 15.g4 Bg6–/+) 14...Ndf6 (14...Ndc5 15.Re1+=) 15.Nc3 0–0 (15...Bh2 16.Kh1=) 16.Ne4 Ne4 17.Be4 de4 18.Qb3 Rd8 19.Rac1 Rd7 20.Rc5 Qe8 (20...Qd6 21.Rfc1–/+) 21.Ne2 (21.Qa4 f6+=) 21...Bb2 (21...Bd6 22.Qc3 f6 23.Rc4+=) 22.Qb2= h6 (22...Rc8 23.Rc8 Qc8 24.Nd4=) 23.Rfc1 Kh7 24.Nd4 Qe7 25.Qc3 Rad8 26.Rc7 Qh4 27.Rd7 Rd7= 28.Qc8 Rd5 29.Qb8 Rg5 30.Rc8 Bh5 31.Rh8 Kg6 32.Qd6 f6 33.Qb8 Qe1 34.Kh2 Rg2?? 35.Kg2= Qd2 36.Kf1 Qd1 37.Kf2 Qd2 38.Kf1 Qd1 ½–½. Bach,Mat (2270) – Antonsen,M (2455), Politiken Cup, Helsingor DEN, 2008.

6.cd5 ed5 7.Nd4 Bg6 8.Be2 a6 (8...Be4 9.b5=) 9.f4 Be4 (9...Qh4!? 10.g3 Qh3=) 10.0–0+= h6 11.f5 (11.a3!?+=) 11...Qg5 (worse is 11...Bb4 12.d3 Bg2 13.Kg2 Qg5 14.Kh1+–) 12.Rf2 Bb1 (12...Bd6 13.d3 Qh4 14.Rf4 Bf4 15.ef4 Bg2 16.Kg2 Qf4 17.Qd2=) 13.Rb1 Ngf6 14.Nf3 (14.Qc2 Ne5+= (14...Bb4? 15.Nf3 Qg4 16.Bf6 Nf6 17.Nd4+–)) 14...Qf5 15.Ne5 Qe6 16.Nd7 Nd7 (16...Kd7?? 17.Bf6 Kc7 18.Bd4+–) 17.Bg4 Qd6 18.Bh5 Nf6 19.Bf6 gf6 20.Qg4 Rh7 21.Qf5 Rg7 22.Qf6 Qf6 23.Rf6 Ke7 (23...Rh7 24.a3 Rc8 25.Rbf1+=) 24.Rbf1+/– (24.Rh6?! Rg2 25.Kg2 Bh6=) 24...Rb8 (24...Kd7!? 25.Rf7 Rf7 26.Rf7 Be7 27.Bg4 Kd8+/–) 25.Bf7+– (worse is 25.Rh6 Rg2 26.Kg2 Bh6 27.Rf7 Ke6+=) 25...Kd8 26.a3 (26.Rh6 Rf7 27.Rf7 Bh6+=) 26...Kc7 27.Bd5! (worse is 27.Rh6 Rg2 28.Kg2 Bh6+/–) 27...Bd6 28.Be6 h5 29.R6f5 Rh8 30.Bb3 Kb6 31.d4 Re7 32.R1f3 h4 33.Rf6 Bc7 34.Rh3 Bd8 35.Rf5 Re4 36.Bc4 Rhe8 37.Kf2 R8e7 38.Bd3 R4e6 39.Rh5 Rg7 40.Rf3 Re8 41.Bc4 Bg5 42.g4 Re4 43.h3 Bd8 44.Rf7 Rf7 45.Bf7 Bf6 46.g5 Bd8 47.Kf3 Re7 48.g6 Rd7 49.Rf5 (49.Rf5 Be7 50.g7+–) 1–0. pcmvr – iozeph (2585), net–chess.com, 2012.

6.cd5 ed5 7.Be2 Bb4?? 8.Bg7 Bb1 9.Rb1 +– (9.Bh8?! Bf5+–).

6.cd5 cd5 7.Be2 Ngf6 8.b5 Be7 9.Ne5 (9.Nc3 e5=) 9...0–0 10.Nd7 Qd7 11.0–0 a6 12.ba6 ba6 13.d3 Rfc8 14.Nd2 Bb4 (14...Rab8 15.Be5 Rb7 16.Nb3=+) 15.Bf6 gf6 16.Nb3 a5 17.Bg4 Bg6 18.Bh5 a4 19.Bg6 fg6 20.Nd4 e5 21.Nc2 Bd6 22.e4 d4 23.a3 (23.Qd2 f5=+) 23...Rc3–/+ 24.Nb4 Bb4 25.ab4 Qb5 26.Qb1 (26.Qg4 Ra6–/+ (26...Rd3?! 27.Qe6 Kg7 28.Qe7 Kh6 29.Qf6=)) 26...a3 (26...Qd3 27.b5–+) 27.Qa2–/+ Kg7 28.Qd5? (better 28.Qe6!? Ra7 29.f4 ef4 30.Qd6 Rd3 31.Rf4–+) 28...Qd5–+ 29.ed5 Rb8 (29...Rd3 30.Rfe1–+) 30.Rfb1 Rd3 (30...Rb5 31.Kf1 Rd3 32.Ke2–+) 31.b5 Kf7 32.b6 Ke7 33.b7 (better 33.Kf1–+) 33...Kd6 34.Rb5 a2 35.Kf1 Rc3?? (better 35...Ra3–+) 36.Ra2= Kc7?? (36...Rc5 37.Rb6 Kc7 (37...Kd5? 38.Ra8 Rb7 39.Rb7+–) 38.Rf6 Rb7 (worse 38...Rd5 39.Rc2 Kd7 40.Rf7 Ke6 41.Rc8+–; 38...Kb7?? 39.Rb2 Kc7 40.Rf7 Kd6 41.Rb8 Kd5 42.Rh7+–) 39.Rf7 Kb8 40.Rf8 Rc8 41.Ra8 Ka8 42.Rc8 Ka7=) 37.d6?? (better 37.Ra8 Rc1 38.Ke2 Rc2 39.Ke1 Rb7 40.d6 Kd6 41.Rb7 Rc1 42.Kd2+–) 37...Kd6–/+ 38.Ra8 (38.Rab2 d3 39.Ke1 Rc2–/+) 38...Rc1 (38...Kc7 39.Rb8 Kb8 40.f3–+) 39.Ke2 Kc7 40.Rb8 Kb8 41.Kd2 (41.Kd3 Rc3 42.Kd2 Rc7–+) 41...Rc3 (41...Rh1 42.Ke2–+) 42.g3 (42.Rb6 f5–/+) 42...e4 (42...Rc7 43.Rb6 f5 44.Rd6–+) 43.Rd5 (43.Rb4 Rd3 44.Ke1 h6–/+) 43...Rf3 (43...Rd3 44.Ke2–+) 44.Rd4 (44.Ke1 d3–+) 44...Rf2–+ (44...Kb7?! 45.Ke2=) 45.Ke3 Rh2 46.Re4 f5 (better 46...Rc2!?–+) 47.Re7–/+ Rh3 (47...h6!?–/+) 48.Kf3= g5 49.Rg7 g4 (49...Rh5 50.Rf7=) 50.Kf4 h5 51.Rf7 (51.Rh7 Rh2=) 51...Rh1 52.Rf5 (52.Rg7 Rf1 53.Kg5 f4 54.Kh5 fg3 55.Rg4 Kb7 56.Rg3 Kc7=) 52...Rf1 (52...Kb7 53.Rf7 Kc6=) 53.Kg5 Rf5 54.Kf5 h4 (54...Kb7?? 55.Kg5+–) 55.Kg4 hg3 56.Kg3 Kb7 ½–½. sirgeshdb (1960) – lebold (1840), lichess.org, 2020.

6.Be2 Bb1 7.Rb1+= Ngf6 8.0–0 (8.b5 cb5 9.Bf6 Nf6 10.Rb5 Qc7+=) 8...Be7 (8...dc4 9.Bc4 Nb6 10.Be2+=) 9.b5 0–0 10.bc6 bc6 11.Qc2 a5 (11...Rb8 12.Rfc1+=) 12.d4 Bb4 (12...c5 13.cd5 Nd5 14.dc5 Nc5 15.Rfd1+=) 13.Bd3 (13.c5 a4 14.a3 Ba5+/–) 13...Bd6 14.Ne5 (14.c5 Bb8+/–) 14...Qc7 (14...Be5 15.de5 Ng4 16.Ba3+=) 15.cd5+/– ed5 16.Nc6 Kh8 (16...Bh2 17.Kh1 Nb8 18.Ne5 Be5 19.de5 Qc2 20.Bc2+/–) 17.g3 Rfc8 18.Rfc1 Ne4? (better is 18...a4+–) 19.Be4 de4 20.Qe4 Nf6 21.Qf5 Qb7 (21...Qd7 22.Qd7 Nd7 23.d5+–) 22.d5 (22.Na5?! Rc1 23.Bc1 Ra5 24.Qf6 A) 24...gf6?? 25.Rb7 Ra2 26.Rb6+– (26.Rf7?! Rc2+–); B) 24...Qc7+–) 22...Nd7 (22...Qd7 23.Qd7 Nd7+–) 23.Bg7! Kg7 24.Rb7 Rc6 25.Rc6 (25.Rc6 Be5 26.Rd7 Rf8 27.Rf7 Rf7 28.Qg5 Kh8 29.Rc8 Rf8 30.Rf8) 1–0. b4_player – opponent, gamecolony.com, 2007.

6.Be2 dc4!? 7.Bc4 A) 7...Bb4?? 8.Bg7 b5 9.Be2+– (9.Bh8?! bc4 10.Nd4 Be4+–); B) 7...Ngf6+=.

4.c4 f6

5.b5 Bb1 6.Rb1 e5 7.Nf3 (7.bc6 Nc6 8.Qb3 Nge7+=) 7...Bd6 (7...Qd7 8.Bc3+=) 8.Be2 (8.bc6 bc6 9.cd5 cd5 10.Bb5 Kf7+=) 8...Ne7+= 9.0–0 Ng6 (9...0–0 10.bc6 bc6 11.d4+=) 10.d4 Nd7 (better 10...e4!? 11.bc6 bc6+–) 11.de5 Be5 12.cd5 Bb2 (12...cb5 13.Be5 Nge5 14.Nd4+–) 13.dc6 (13.bc6 bc6 14.dc6 Nde5 15.Rb2 Rc8 16.Qd8 Kd8 17.Rd1 Kc7+–) 13...Ba3 (13...Be5 14.cd7 Qd7 15.Qd7 Kd7 16.Rfd1 Ke7 17.Bd3+–) 14.cd7 (better 14.Qb3 Bd6 15.Qe6 Qe7 16.cd7 Kd8 17.Qd5 Qd7 18.Rfd1+–) 14...Ke7?? (14...Qd7 15.Qd7 Kd7 16.Rfd1 Kc7 17.Rb3+–) 15.Qb3 (15.Qd3 Bd6 16.Nd4 Bh2 17.Kh2 Qc7 18.g3 Qd7 19.Qe4 Kf8 20.Ne6 Kf7 21.Bc4+–) 15...Bd6 16.Nd4 Qd7 17.h3 Rac8?? (17...f5+–) 18.Bg4 f5 1–0. BeepBeepImAJeep – louwyhs, lichess.org, IM BeepBeepImAJeep simul, 2017.

5.b5 Bg6 6.a4 e5 7.Nf3 Bd6 8.Be2 e4 (8...Ne7 9.Nc3=) 9.Nd4 Qc8 (9...Be5 10.Qb3 dc4 11.Bc4 Bd4 12.Bd4+=) 10.cd5+= cd5 11.Nc3 Ne7 12.Rc1 Qd7 13.0–0 0–0 14.f4 ef3 15.Bf3 a6 16.Nd5 (16.Qb3+–) 16...Nd5 (better 16...Bh2!? 17.Kh2 Nd5+=) 17.Bd5+– Kh8 18.Qb3 Be5? (18...Re8 19.b6+–) 19.Bf3 (better 19.Ne6 Bd6 20.Nf8 Bf8 21.Be6+–) 19...Bf7 (19...ab5 20.ab5 Bf7 21.Qb4+–) 20.Qc2 (20.Qb4 Rd8+–) 20...ab5+– 21.ab5 Qe8 (better 21...Ra2!? 22.Qb1 Rd8+–) 22.Bb7+– Ra7 (22...Ra2 23.Qb1 Qd7 24.Be4+–) 23.Bf3 (23.Bc6 Nc6 24.Nc6 Bb2 25.Qb2 Rb7+–) 23...f5 (better 23...Ra2 24.Qb1 Bd4 25.Bd4 Rd2+–) 24.Nc6 Nc6 (24...Bb2 25.Qb2 Ra2 26.Qd4+–) 25.bc6 (25.Bc6 Qe7 26.Be5 Qe5 27.Qf5 Qb8+–) 25...Rc7 (25...Bb2 26.Qb2 Rc7 27.Qb4+–) 26.Be5 Qe5 27.Qc5 Qf6 (27...Qe8+–) 28.Qf8 (28.Qf8 Bg8 29.Qf6 gf6 30.d4+–) 1–0. BeepBeepImAJeep (2695) – bidon67 (2165), lichess.org, 2016.

5.Nc3 e5 6.Qb3 Be6 (6...d4 7.ed4 ed4 8.Nce2=) 7.cd5 cd5 8.Bb5 Nc6 9.e4 (9.Nf3 a6 10.Bc6 bc6=) 9...Nge7+= 10.Rc1 Qd6 (10...Kf7 11.Nf3+=) 11.Qa4 g6 (11...a6 12.ed5 Bd5 13.Nd5 Qd5 14.Be2–/+) 12.Nf3 (12.Nd5 Bd5 13.ed5 Qd5=) 12...Kf7 (12...d4 13.Ne2=) 13.ed5 Nd5 14.Bc6 (14.a3 Nc3 15.Rc3 Ne7=) 14...bc6+= 15.a3 Bd7 (15...Nf4!? 16.0–0 Nd3+=) 16.Ne4+= Qe7 17.Qb3 (17.Nc5 Nf4 18.g3 Ng2 19.Ke2 Bg4 20.Qc6 Rd8+/–) 17...Bh6 (17...a5!? 18.0–0 Kg7= (18...ab4 19.Nf6 Ra3 20.Ba3 Qf6 21.Ne5 Qe5 22.Bb2+–)) 18.0–0+= Kg7 19.Rfe1 (better is 19.Rce1+=) 19...Nf4?? (better is 19...Rhd8=) 20.Nf6!+– Be6 (20...Qf6 21.Be5) 21.Re5 Kf7 22.Rce1 Rhd8 (22...Qd6 23.Ne4 Qd3 (23...Bb3?? 24.Nd6 Kg8 25.Re8 Re8 26.Re8 Bf8 27.Bh8+–) 24.Qd3 Nd3 25.Re6 Nb2 26.Rc6 Nd3 27.Rc7 Kf8+–) 23.Re6! (23.Re6 Ne6 24.Ne5 Kf8 25.Nc6+–; worse is 23.Nh7 Bb3 24.Re7 Kg8 25.Nf6 Kf8+–) 1–0. Diener,Rudolf – Petzold,Gunter, corr DDR (year?).

5.Nc3 e5 6.cd5 cd5 7.Bb5 (7.a3 a5=) 7...Nc6 8.Nf3 (8.Qa4 Nge7=+) 8...Bb4=+ 9.Qa4 Qb6?? (better 9...Bc3 10.Bc6 bc6 11.Qc6 Bd7 12.Qc3 Rb8=+) 10.Nd5+– (10.Nd5 Qa5 11.Qb4 Qb4 12.Nb4+–) 1–0. DEFFM – receficebrumbrum, freechess.org, 2018.

5.cd5 Qd5 6.Nc3 Qd6 =.

5.Nf3 e5 6.b5 Bd6 7.Nc3 Ne7 8.d4 Qa5 9.c5 ed4 10.ed4 Bf4 11.g3 Bh6 12.Nh4 (12.Bd3 Bd3 13.Qd3 b6=) 12...Kf7 (12...Qb4 13.Qe2 (worse is 13.Nf5 Nf5 14.Rb1 Nd4–/+) 13...Bg4 14.f3+= (14.Qg4?? Qb2 15.Rd1 Qc3 16.Ke2 f5–+)) 13.Nf5 (13.Qh5!? Bg6 14.Ng6 hg6 15.Qg4=) 13...Nf5= 14.Bh3 Re8 (14...Qb4!? 15.bc6 Nc6 (worse is 15...Qb2 16.cb7 Qb7 17.Bf5+/–) 16.Bf5 Qb2 17.Nd5 Nd4=) 15.Kf1+= Qb4 16.Rb1 (better is 16.bc6!? bc6 17.Bf5 Qb2 18.Na4+=) 16...Nd4+= 17.Kg2 Ne6?? (17...Nb5 18.Nb5 Qb5+/–) 18.Qh5+– Kf8 19.Rhe1 Nd7 20.Be6 (20.Re6?! Nc5 21.Rf6 gf6 22.Qh6 Kg8+–) 20...Re7 21.Bd5! Rae8 (21...cd5 22.Re7 Theme: Double Attack) 22.bc6 bc6 23.Bb3 (better is 23.Re7!? Re7 24.Bc6 Qa5+–) 23...Nc5 24.Re7 Re7 25.Rd1 Nd7 26.Qf5 g6 (26...Ke8 27.Qh7 Nf8 28.Qc2+–) 27.Qh3 (27.Qh3 Ke8 28.Qh6+–) 1–0. Sokolski,Alexey P – Csaszar, corr W–ch sf, 1959.

5.Nf3 e5 6.cd5 cd5 7.Bb5 (7.b5 Nd7 8.Nc3 Be6=) 7...Nc6= 8.Nh4 Bg6 (8...Be6!?=) 9.Ng6 hg6 10.0–0 (10.a3 a6 11.Ba4 Nge7+–) 10...Bb4= 11.Qa4 Qb6?? (better 11...Qd6=) 12.Qb4+– 0–0–0 (12...Kf7 13.Qb3 Nge7 14.Ba3+–) 13.Qb3 (13.Qa4 Kb8+–) 13...Na5 (13...Nge7 14.Nc3 a6 15.Be2 Qb3 16.ab3+–) 14.Rc1 Kb8 15.Qa4 a6 (15...Ne7 16.Na3+–) 16.Bc3 ab5 17.Ba5 (17.Ba5 ba4 18.Bb6+–) 1–0. GuestDXKH – Hrekall, freechess.org, 2019.

4.c4 Nf6

(--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.c4 c6).

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

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

4.c4 Bg6

5.a4 Nd7 6.b5 Ngf6 7.Nf3 e6 8.Be2 Rc8 (8...dc4 9.Bc4 Rc8 10.bc6 Rc6 11.d3=) 9.0–0 (9.d3 Bb4 10.Bc3 Bc3 11.Nc3 Qa5=+) 9...Bd6 (9...dc4 10.Bc4 cb5 11.Bb5=+) 10.d4 (10.d3 0–0=) 10...dc4=+ 11.Nbd2? (better 11.Bc4 cb5 12.Bb5=+) 11...cb5–+ 12.ab5 (better 12.Rc1 a6 13.ab5 ab5 14.Nh4–+) 12...a6?? (better 12...c3 13.Bc3 Rc3 14.Ra7 0–0–+) 13.Nc4+– (13.ba6?! c3 14.ab7 Rc7=; worse 13.Bc4 Qb6+=) 13...Bb8 14.ba6 ba6 15.Ra6 0–0 16.Ba3 Re8 17.Bd6 Rc4 18.Bc4 Qc8? (better 18...Bd6 19.Rd6 Qc7 20.Rd7 Nd7+–) 19.Be2 (19.Qa4 Bd6 20.Rd6 Qc7+–) 19...Nd5 (19...Be4 20.Bb8 Bf3 21.gf3 (21.Bf3?! Qa6 22.Bg3 e5+–) 21...Qb8 22.Qd3+–) 20.Bb8 Nb8 21.Ra3 Nc3 22.Qe1 Ne2 23.Qe2 Nd7 24.Ne5 (24.Rfa1!? Qc6+–) 24...Ne5 25.de5 Qc5 26.Qb2 h6 27.Rb3 Kh7 28.Rc1 Qd5 29.h3 Rd8 30.Rb5 Qd3 31.Qc3?? (31.Rbc5 Qd2 32.Qd2 Rd2+–) 31...Qf5?? (better 31...Qb5 32.Kh2 Rd5–+) 32.Rb2 (32.Qb4 Qh5+–) 32...Rd3 33.Qc7 Qe4 (33...Qg5 34.Rb4+–) 34.Rbc2 (34.Rb8 Qd5+–) 34...Qd5 (34...Qf5 35.Rc4+–) 35.Rc4 Rd2 36.Rf4 Qd3 (36...Qb5 37.Qc3 Rd5 38.Rb4+–) 37.Qc3 (37.Rd4 Qe2 38.Rd2 Qd2+–) 37...Qe2 (37...Qc3 38.Rc3 Rd5 39.Rfc4 Re5 40.Kf1+–) 38.Qc4 Rd1 39.Kh2 Qc4 (39...Bd3 40.Qc8 Rc1 41.Qc1+–) 40.Rcc4 (40.Rfc4 Rd5 41.Rc5 Rd2+–) 40...Re1 (40...Rd5+–) 41.Rc7 Kg8 42.h4 Re2 43.g4 h5 44.Kg3 hg4 45.Kg4 Bf5 46.Kf3 Re1 47.e4 (47.h5 Rh1 48.e4 g5 49.hg6 Bg6+–) 47...Bg6 48.Kg4 Kh7 (48...Rg1 49.Kh3+–) 49.Kh3 (49.Kg5 Be4 50.Rff7 Rg1 51.Kf4 Bd5+–) 49...Kh6 50.Rg4 1–0. BeepBeepImAJeep (2575) – Shakiro (2300), lichess.org, 2016.

5.a4 e6 6.b5 Nd7 7.Nf3 Ngf6 8.Be2 Bd6 9.0–0 0–0 10.d4 Re8 (10...dc4 11.bc6 bc6 12.Na3=) 11.Nc3 Rc8 (11...dc4 12.bc6 bc6 13.Bc4=) 12.Rc1 (12.c5 Bb8=) 12...Bb8 13.bc6 bc6 14.cd5 cd5 15.Nb5 (15.Ba6 Rc7=) 15...Nb6 (15...Qb6 16.Ba3=) 16.a5 (better 16.Ne5!?=) 16...Nc4–/+ 17.Bc4 dc4 18.a6 (18.Qa4 Bd3 19.Rfd1 Be2=+) 18...Nd5 (18...Bd3 19.Qa4–/+) 19.Ne5 (19.Qa4 Qd7 20.Nc3 Qa4 21.Na4 Bd6–/+) 19...Qb6 (19...Qa5!? 20.Nc3 Be5 21.de5 Nb4–/+) 20.Qa4=+ The pressure on the isolated pawn grows 20...Be5 21.de5 Bd3 22.Bd4 Qc6 23.Rfd1 Nb6?? (better 23...Nc7 24.Rd3 Nb5=+) 24.Qa5 Qe4? (24...Qd5 25.Ra1 Re7 26.Na7 Qa5 27.Nc8 Na4 28.Ne7 Kf8+–) 25.Na7+– Nd5 (25...Na8 26.Nc8 Rc8 27.Qa4+–) 26.Nc8 Rc8 27.a7 (better 27.f3 Qg6 28.a7+–) 27...Ne7 (27...Ra8 28.f3 Qh4+–) 28.Rd3! cd3 (28...cd3 29.Rc8 Mate attack; 28...Qd3 29.a8Q Combination) 29.Rc8 Nc8 30.a8Q (30.Qd8) 30...d2 (30...f6 31.Qd8 Kf7 32.Qd7 Kg6 33.Qe4 Kh6 34.Qf7 fe5 35.Qh4) 31.Qc8 (31.Qe4?? d1Q 32.Qe1 Qe1) 1–0. BeepBeepImAJeep (2620) – tushinskiy (2235), lichess.org, 2016.

5.a4 e6 6.Nf3 Nf6 7.b5 Be7 8.Be2 0–0 9.0–0 Nbd7 (9...dc4 10.Bc4 cb5 11.ab5=) 10.d4 Rc8 11.Nbd2 a6 (11...Ne4 12.Qb3=) 12.ba6+= ba6 13.cd5 cd5 14.Ba6 Ra8 (14...Rc2 15.Ba3 Ba3 16.Ra3+=) 15.Bb5+– Nb6 (15...Qb8 16.Ba3 Ba3 17.Ra3+–) 16.a5 Nc8 17.a6 (17.Qa4 Nb6 18.Qb3 Nc8+–) 17...Nd6 (better 17...Rb8!? 18.a7 Na7 19.Ra7 Rb5=) 18.Bc6 (18.Be2!?+–) 18...Ra7+= 19.Qe2?? (19.Ne5 Qb6 A) worse 20.Ng6 fg6 21.Qc2 Rc7=+ (21...Ra6?! 22.Ra6 Qa6 23.Ra1=); B) 20.Ba3 Ra6 21.Qe2+– (worse 21.Ng6 fg6 22.Bd6 Bd6 23.Ra6 Qa6=)) 19...Nfe4?? (better 19...Qb6 20.Ba3 Qc6–+) 20.Ne4 Ne4 (20...Be4!? 21.Ne5 Qb6+–) 21.Ne5+– Bd6 22.Bb7 Be5 23.de5 Qb8 (23...Nc5 24.Bd4 Rb7 25.Bc5+– (worse 25.ab7 Nb7 26.Qb5 Nd6 27.ed6 Qd6+–)) 24.Bd4 Rb7 25.ab7 Qb7 26.Rfb1 (better 26.f3 Ng5 27.h4 Nf3 28.gf3 Qe7+–) 26...Qd7 27.Rc1 h5 28.h3 (28.f3 Ng5+–) 28...Ng5 (28...Rc8 29.Qa6 Rb8 30.Rab1+–) 29.Ra7 Qd8 30.Rcc7 Nh7 (30...Ne4 31.f3 Ng3 32.Qe1+–) 31.f4 (31.Bc5 Re8+–) 31...h4 (31...Qb8 32.Qd1+–) 32.Qf2 Bf5 (32...Qb8+–) 33.Bc5 Bg6 34.Bf8 Qf8 35.Qh4 Qb4 (35...Be4+–) 36.Rc8 Nf8 37.Raa8 Be4 (37...Qb1 38.Kh2 Qb4 39.Rf8 Qf8 40.Rf8 Kf8 41.Qd8) 38.Rf8 Qf8 39.Rf8 Kf8 40.Qd8 1–0. BeepBeepImAJeep (2640) – karol19980330 (1945), lichess.org, 2017.

4.d3 Nd7

5.Nd2 e5 6.Ne2 (6.Ngf3!? Bd6 7.Be2=+) 6...Bb4–/+ 7.c3 Bd6 8.e4 (8.Ng3 Bg6–/+) 8...Bg6 9.g3 (9.Ng3!?–+) 9...Ngf6 10.Bg2 0–0 11.0–0 de4 12.de4 Nc5 13.Qc2 Bc7 (13...Be7 14.Rab1–+) 14.h4 (14.Rad1!?–/+) 14...Qd3 15.Qd3 Nd3 16.Ba3 Rfd8 (16...Rfe8–+) 17.Nc4 (better is 17.Be7!? Nf2 18.Bd8 Rd8 19.Kf2 Rd2 20.Rfd1 Bb6 21.Ke1 Rd1 22.Rd1 Be4 23.Be4 Ne4 24.Rd7–+) 17...b5 18.Ne3 Be4 19.f3? (19.Be7 Bg2 20.Kg2 Rd7 21.Bf6 gf6–+) 19...Bd5 (19...Bb6 20.fe4 Be3 21.Kh1 Nf2 22.Rf2 Bf2 23.Bf3–+) 20.Rad1 (20.Kh2–+) 20...e4 21.Nf4?? Bc4 22.Nc4 Bf4 23.gf4 bc4 24.fe4 Ng4 25.Bc1 Rab8 26.Bf3 Nc1 27.Rc1 Ne3?? 28.Rf2?? Rd7 29.Re1 Rd3 30.Be2 Nc2?? 31.Rc1 Rb2? 32.Bd3+– cd3 33.e5 Ra2 34.f5 Kf8 35.e6?? f6?? 36.e7?? Ke7 37.Rd1 Ra1 38.Ra1 Na1 39.Ra2 Nb3 40.Ra7 Kd6 41.Rg7?? d2–+ (42.Rh7 d1Q 43.Kf2 Qd2 44.Kg1 Qe3 45.Kg2 Nd2 46.Rd7 Kd7 47.Kh2 Qf2 48.Kh3 Ne4 49.Kg4 Qg3 50.Kh5 Qg7 51.c4 Ng3) 0–1. MasterofDisaster – guigon8, Caissa's Web, 2004.

5.Nf3 Qb6 6.c3 a5 7.Qa4 Nc5! 8.Qc2 (8.bc5 Qb2) 8...ab4 9.cb4 Qb4 10.Bc3 Qa4 11.Qd2 Nf6 12.Be2 h6 13.0–0 Ncd7 14.Qb2 b6 15.Nbd2 e6 16.Nd4 Bg6 17.f4 Ba3 18.Qb3 0–0 19.Qa4 Ra4 20.Bd1 Raa8 21.Bc2 Rfc8 22.N2f3 (22.Nb1 Bc5–+) 22...Bf8 (22...c5!? 23.Nb5–+) 23.a4 c5 24.Nb5 c4 25.Rfd1 Ng4 26.Bd2 cd3 27.Bb1 Nc5 28.Nfd4 Ra4 29.Ra4 Na4 30.h3 Nf6 31.f5 ef5 32.Bc1 Nc5 33.Bd2 (33.Bb2 Bh5 34.Nf3 Nfe4 35.Bd3 Nd3 36.Rd3 Rc2–+) 33...Re8 34.Bc1 Rc8 (34...Be7 35.Bb2–+) 35.Na7?? (35.Bd2 Nfe4 36.Be1–+) 35...Ra8–+ 36.Ndc6 (36.Nab5 Bh5 37.Nf3 Ra5–+) 36...f4! 37.ef4 Nfe4 38.Bb2 (38.Nb5–+) 38...Na4 39.Bd4 Nec3 40.Rf1 Ne2 41.Kf2 (41.Kh2 Nd4 42.Nd4 Ra7–+) 41...Nd4 42.Nd4 Ra7 43.f5 Bc5 44.Ke3 Bf5 (better is 44...Bh5!? 45.g4 Nb2 46.gh5–+) 45.Rf5 d2! 46.Kd2 Bd4 47.Rd5 Bc3 48.Kc2 Bf6 49.Rb5 Nc3 (50.Rb6 Nb1 51.Rb1 Ra2 52.Kd3 Rg2–+) 0–1. Amor Alcaide,Manuel – Peric,Slavisa (2365), La Pobla de Lillet op, 1998.

5.Nf3 e6 6.a3 c5 7.bc5 Nc5 8.Nbd2 a6 9.Be2 Nf6 10.Nh4 Bg6 11.0–0 Bd6 12.g3 (12.f4!?=) 12...Na4 13.Ng6 hg6 14.Rb1 b5 15.Ba1 Rc8 (15...Ba3 16.c4+=) 16.c4= e5 (better is 16...Qd7=) 17.cb5+/– ab5 18.d4 Qd7?? (better is 18...Nc3 19.Bc3 Rc3 20.de5 Be5+/–) 19.de5 (better is 19.Bb5 Qb5 20.Rb5 Nc3 21.Bc3 Rc3 22.de5 Be5+–) 19...Qh3 20.Bb5 Kf8 21.Nf3 Ng4 (21...Ne4 22.Qd5 (22.Qa4 Nd2 23.Nh4 Rh4 24.Qh4 Nf3 25.Kh1 Nh4 26.gh4 Ba3–/+; 22.ed6 Ng5 23.Re1 Nf3 24.Qf3 Qh2 25.Kf1 Nb6+–) 22...Qf5 23.Ba4+–) 22.Qd5 (better is 22.Bd7 Qh5 23.ed6+–) 22...Nh2 23.Ng5 (better is 23.Qf7! Kf7 24.Ng5 Kf8 25.Nh3 Nf1 26.ed6+– (26.Ba4?! Nd2 27.Nf4 Nb1 28.Ng6 Kf7 29.Nh8 Rh8 30.ed6 Na3+–; worse is 26.Rf1 Nc3 27.Bd7 Rc7 28.ed6 Rd7+–; 26.Kf1?! Ba3 27.Ba4 Rh3+–; 26.Bf1?! Ba3 27.Bd4 Nc5+–)) 23...Qf1 (23...Nf3! 24.Qf3 Qh2) 24.Bf1 (24.Bf1 Nf3 25.Qf3+–) 1–0. Haisma,Hans – Schrijvers,Kees, Groningen Harmonie Mini, 2004.

4.d4 Nd7

5.a3 e6 6.c4 dc4 7.Bc4 Ngf6 8.Nc3 Be7 9.Bd3 Bd3 10.Qd3 Nd5 11.Nf3 0–0 12.0–0 h6 13.h3 Bf6 14.Rac1 Re8 15.Nd5 ed5 16.Rc2 Nb6 17.Nd2 Rc8 18.Rfc1 Qd7 19.a4 (19.Qe2=) 19...Rcd8 (better is 19...Na4!? 20.Nb3 Nb2 21.Rb2 a6–/+) 20.b5 Rc8 (20...Na4!? 21.bc6 bc6=) 21.bc6+/– Rc6 22.a5 Na4 23.Ba3 Rc2 24.Rc2 b6 25.ab6 Nb6 26.Rb2 Be7 27.Be7 Qe7 28.Nb3 Nc4 29.Ra2 Rb8 30.Nc5 Qd6 (30...a5 31.e4=) 31.g3 (31.Ra7!? Qb6 32.Rd7+–) 31...Qe7 32.Kg2 Nd6 (32...a5 33.Qf5 Qd6 34.Rc2=) 33.Ra6 (33.Qa6 Nc4+/–) 33...Nc4 34.Qf5 (34.e4!?+=) 34...Rb2= 35.Qf4 (35.Kh1=) 35...Nd2 (better is 35...Ne3 36.Kh2 Nf1 37.Kg2 Qe2=+) 36.Qb8?? (better is 36.Qd6 Qd6 37.Rd6+=) 36...Kh7 (better is 36...Rb8 37.Ra1 Rb2–+) 37.Ra7 (better is 37.Qb2 Ne4 38.Qb7 Qb7 39.Nb7+–) 37...Qf6 (37...Rb8? 38.Re7 Ne4 39.Ne4 de4 40.Rf7+–) 38.Qf4 (38.Qb2?! Qf3 39.Kg1 Qd1 40.Kh2 Nf3 41.Kg2 Ne1 42.Kh2 Nf3 43.Kg2 Ne1 44.Kh2 Nf3=) 38...Qg6? (better is 38...Qf4 39.gf4 Nc4+/–) 39.Rf7+– Rc2 40.Qf5 (40.Rf5!? Ne4 41.Ne4 de4 42.Qe4 Rc8+–) 40...Qf5 41.Rf5 Ne4 (41...Nc4 42.Kf3 Nb6 43.h4+–) 42.Ne4 de4 43.Re5 Kg6 44.Re4 Kf6 45.Re5 (45.d5 Rc7+–) 45...g6 (45...Re2 46.Ra5+–) 46.Rc5 Rd2 47.Kf3 (47...h5 48.Rc6 Kf7 49.Rd6+–) 1–0. slavisa11 – Chakra, Live Game Caissa's Web, 2004.

5.Nf3 e6 6.a3 Ngf6 7.c4 dc4 8.Bc4 Be7 9.0–0 0–0 10.Nc3 Bg4 11.e4 e5 12.Be2 ed4 13.Nd4 Be2 14.Qe2 Qc7 15.f4 Nb6 16.Nf5 Rad8 (16...Rfe8 17.Rac1+=) 17.e5 Nfd5 18.Rac1 (18.Qg4 g6+/–) 18...Nc3 19.Qg4 g6 20.Bc3 Nd5 21.Bd4 f6 (21...Rfe8 22.Ne7 (< 22.Ba7 b6–/+) 22...Ne7 23.Rcd1+/– (< 23.Ba7 b6–/+)) 22.e6 b6 23.Nh6 Kg7 24.Nf7 Rc8 (24...Rf7!? 25.ef7 Nb4 26.Bf6 Bf6 27.ab4 Qd6+/–) 25.f5 c5 26.Qh4 g5 (26...Rf7 27.ef7 Qd7 28.bc5 bc5+–) 27.Qg5# 1–0. MT – StormKnight (1690), ICC, 2004.

5.Nf3 Ngf6 6.c4 e6 7.c5 Be7 8.Be2 0–0 9.0–0 b6 10.Nh4 Be4 11.Nd2 bc5 12.dc5 Bg6 (12...Qb8 13.Qb3= (< 13.Ne4 Ne4 14.Nf3 Qb4–/+)) 13.Ng6+= hg6 (13...fg6 14.Nf3 Qb8 15.a3+=) 14.Nf3 a5 15.a3 Qb8 (15...ab4 16.ab4 Ra1 17.Qa1+=) 16.Qd4 Ne4?? (better is 16...ab4 17.ab4 Ra1 18.Ba1 Qb7+=) 17.Qg7# 1–0. bambi_nik (2230) – tapsatal (1835), ICC, 2006.

4.d4 Nf6

5.a3 e6 =+.

5.c4 e6 6.a3 dc4 7.Bc4 b5 8.Bb3 Bd6 9.Nf3 h6 10.–0 Qc7 11.Nbd2 Ng4 (11...Bd3 12.Re1 Ng4 13.g3=) 12.g3 Nd7? (better is 12...Nf6!?+=) 13.e4+– Bg6 14.e5 Nde5 (14...Be7 15.h3+–) 15.de5 Ne5 16.Ne5 Be5 17.Be5 Qe5 18.Re1 Qf5 19.Rc1 Rc8? (19...Bh5 20.f3 Rd8 21.Rc6+–) 20.Bc2 (20.Ne4!? 0–0 21.Nd6 Qf6 22.Nc8 Rc8+–) 20...Qf6 21.Bg6 Qg6 22.Nf3 Rd8 23.Qc2 Qc2 24.Rc2 Rd3 25.Re3 Rd1 26.Kg2 Kd7? (26...Ke7 27.Rc6 Rhd8 28.Ra6+–) 27.Rd2 (better is 27.Ne5 Ke8 28.Rc6+–) 27...Rd2 28.Ne5?? (better is 28.Nd2 Rd8 29.Rd3 Ke7 30.Rd8 Kd8 31.Ne4+–) 28...Ke7 (28...Kc7!? 29.Nf7 Rf8 30.Rf3–+) 29.Nc6 Kd6 30.Ne5 Kd5 31.Nf3 Rc2?? 32.Re5?? Kc4?? 33.Re4?? Kb3 34.Re3? Rc3 35.Nd4 Kc4 (35...Kc4 36.Rc3 Kc3 37.Nb5 Kc4 38.Na7 Ra8–+) 0–1. nordlicht (1955) – vpartsch, gameknot.com, 2013.

5.Bd3 Ne4 6.Nf3 Nd7 7.0–0 e6 8.a3 a5 9.Ne5 (9.b5!?=) 9...ab4–/+ 10.Nd7 Qd7 11.ab4 Ra1 12.Ba1 Bd6 13.Be4 Be4 14.Nd2 Bf5 15.Re1 Bb4 16.c3 Bd6 17.Qa4 0–0 18.Nf3 f6 19.h3 h5 (19...b5 20.Qb3–+) 20.Nh4 Be4 21.f3? (21.Qd1 Qf7–+) 21...Bh7 22.f4 g5 23.fg5 fg5 24.Nf3 Qg7 25.c4 g4 26.hg4 hg4 27.Nh2?? Bh2 28.Kh2 g3 29.Kh1 Qh6 30.Kg1 Qh2# 0–1. Neffgen,Dieter (1740) – Waibel,Ulrich (1650), RS6D – A00 – Sokolsky Alt–1, 2004.

5.h3 Nbd7 6.c4 (6.b5 e6–/+) 6...e6 7.a3 (7.c5 Be7=+) 7...a5 (7...Bd6 8.Nf3=+) 8.c5 (8.b5 cb5 9.cd5 b4 10.de6 Be6=+) 8...Be7 (8...ab4 9.ab4 Ra1 10.Ba1=+) 9.b5 cb5 (9...0–0 10.Nf3=+) 10.Bb5= 0–0 11.Nd2 (11.Ne2 Rc8=) 11...Qc7 (11...b6 12.c6 Nb8 13.Rc1=) 12.Ngf3 Rfc8 (12...b6 13.c6 Nb8 14.g4=) 13.Nh4 (13.g4 Bg6=+) 13...Bg6 (better is 13...Be4!?=) 14.Ng6+= fg6 15.a4 (15.0–0 b6 16.c6 Nf8+=) 15...b6 16.c6 Nb8 17.Rc1 Qd6 (17...Bb4 18.Ke2+=) 18.Qc2+/– Ra7 (better is 18...Na6 19.Qb3 Nc7+/–) 19.Ke2?? (better is 19.Nf3+/–) 19...Rac7–/+ 20.Qb1 (20.e4 Ne4 21.Ne4 de4 22.Qe4 Bg5=+) 20...Nc6 21.f3 Qg3 22.Rhg1 Nb4 23.Rc7 Rc7 24.Ba3 Kf7 25.e4 Nh5 26.Nf1? Nf4–+ 27.Kd1 Qf2 28.Bb4 Qg1 29.Bd2 Qf1 30.Bf1+– Nh5 31.ed5 ed5 32.Qb6 Rd7 33.Qa5 Ng3 34.Bb4 (34...Bb4 35.Qb5+– (< 35.Qb4 Nf1 36.Qe1 Ra7+–); better is 34.Bb5 Rd6 35.Bf4+–) 1–0. Kopp,Norbert – Gebel,Ralph, Pinneberg–ch, 2003.

5.h3 e6 6.a3 =+.

4.Be2 Nd7

5.d3 e5 6.a3 f6 (6...a5 7.b5=+) 7.Nd2 Bd6 8.Ngf3 Ne7 9.c4 Qc7 (9...Be6 10.0–0=) 10.Nh4 (10.e4!? Bg6 11.c5 Bc5 12.bc5 Nc5 13.Qc2+–) 10...dc4+= 11.Nf5 Nf5 12.Nc4 Be7 13.Bg4 Nd6 14.Qb3 Nb6 15.Na5 f5? (better 15...Rd8!?+=) 16.Bh5+– g6 17.Bf3 (better 17.Be5 Rf8 18.Bf3+–) 17...Bf6+= 18.Rc1 Rc8 19.Qe6 (19.b5 Nd5 20.Nc4 Nc4 21.Qc4 Qa5 22.Kd1 Ke7 23.Bd5 cd5 24.Qd5 Rc1 25.Kc1 Qc7 26.Kd1 Rd8+=) 19...Qe7= 20.Qe7 Ke7 21.Ke2 Rhd8 (21...Kf7 22.e4=) 22.g3 (22.Bc6!? bc6 23.Nc6 Rc6 24.Rc6+=) 22...Rc7 23.Rhd1 e4 (better 23...Na4 24.Ba1 Nb5=+) 24.de4?? (better 24.Bf6 Kf6 25.de4+–) 24...Bb2–+ 25.Rc2 Ba3 26.e5 Nf7 (26...Ne4 27.Rd8 Kd8 28.Nc4 Bb4 29.Nb6 ab6 30.Be4 fe4 31.Rc4–+) 27.Rd8 (27.Rb1–+) 27...Kd8 28.b5 Bb4 (28...cb5!? 29.Nb7 Kc8 30.Rc7 Kc7 31.e6–+) 29.Nb7 Rb7 30.Bc6 Rc7 31.f4 Ke7 32.Ra2 (32.Rb2 Bc3 33.Rc2 Be5 34.fe5 Ne5–+) 32...Nd8 33.Bf3 Ne6 34.Kd3 (34.h3 Nc5 35.Rb2 Bc3–+) 34...Nc5 35.Ke2 Ne4 36.Be4 fe4 37.g4 (37.Rb2 Nd5–+) 37...Nd5 38.Kf2 Bc5 39.Kg3 (39.Ke1 Be3 40.f5 Nf4 41.f6 Kf7–+) 39...Be3 40.f5 Bf4 41.Kh4 Be5 42.fg6 hg6 43.Kg5 Kf7 44.Rf2 Bf6 45.Kh6 g5 (45...e3 46.Ra2 e2 47.Rd2 Rc8 48.Rd5 Rh8) 46.h4 Ke6 (46...e3 47.Rf6 Nf6 48.hg5 e2 49.g6 Kg8 50.Kg5 e1Q 51.Kf4 Qe4 52.Kg3 Rc2 53.b6 Qg4) 47.hg5 (47.Ra2 e3 48.hg5 Bg7 49.Kh5 Nf4 50.Kh4 e2 51.Re2 Ne2 52.g6 Bf6 53.Kh3 Rc3 54.Kh2 Nf4 55.g7 Rh3 56.Kg1 Bd4 57.Kf1 Rh1) 47...Be5 (better 47...Bg7 48.Kh5 e3 49.Ra2–+) 48.Kg6 (48.g6–+) 48...Nf4 49.Kh6 Rc8 50.g6 Bf6 (50...Rh8 51.Kg5 Nh3) 51.g7–+ Nd5 52.g5 Bg7! 53.Kg7 e3 54.Re2 Rc7 55.Kh6 Ke5 (55...Rc1 56.Kh7–+) 56.g6 (56.Re1 Rc2 57.g6 Kf6–+) 56...Ke4 (56...Rc1 57.Kg7–+) 57.Re1 Kd3 (57...Rb7 58.g7 Rb6 59.Kg5–+) 58.g7 (58.Rd1 Kc4 59.g7–+) 58...e2 (better 58...Ne7 59.Rd1 Kc2–+) 59.g8Q+– Kd2 (59...Rc5 60.Qf8 Rb5 61.Qf3 Kd4 62.Re2 a6 63.Re4 Kc5 64.Qf8 Kb6 65.Qd6 Ka7+–) 60.Qh7 (better 60.Ra1 Rd7 61.Qg5 Ne3 62.Ra2 Kd3 63.Ra3 Kc4 64.Qf4 Kd5 65.Rd3 Kc5 66.Rc3 Kb6 67.Qf6 Rd6 68.Qd6 Kb5 69.Qb8 Ka4 70.Qb3 Ka5 71.Rc5 Ka6 72.Qb5) 60...Ke1 (better 60...Rh7 61.Kg6 Ke1 62.Kh7 Kd2–+) 61.Qe4 (better 61.Qb1 Kd2 62.Qa2 Ke3 63.Qd5=) 61...Ne3?? (better 61...Nc3 62.Qd4 Rc8–/+) 62.Qe3+– Kf1 63.Qf3 Ke1 64.Qg3 Kd1?? (better 64...Kd2 65.Qd6 Ke3 66.Qe5 Kd3 67.Qd5 Ke3 68.Qe6 Kd2 69.Qa2 Kd3 70.Qb1 Kd2 71.Qb2 Rc2 72.Qd4 Kc1+–) 65.Qc7 (better 65.Qd6 Ke1 66.Qc7+–) 65...e1Q+= 66.Qd6 Qd2 67.Qf4?? (better 67.Qd2 Kd2 68.Kg5=) 67...Qf4–+ 68.Kg6 (68.Kg6 Qf1 69.b6 ab6 70.Kg5–+). FeegLood (2690) – erindreki (2505), lichess.org, time forfeit, 2015.

5.Nf3 Qc7 6.0–0 (6.Nh4 Bg6=) 6...e5 7.Nh4 (7.a3 Ngf6=) 7...Bg6 (7...Be6 8.a3=) 8.f4 (8.a3 Ngf6=) 8...f6 (8...ef4 9.Rf4 Ngf6 10.Nf3=+) 9.Bh5 (9.fe5 Ne5 10.a3 Bd6=) 9...Ne7 (< 9...Bb4 10.f5 (10.Ng6?! hg6 11.Bg6 Kd8=+) 10...Bh5 11.Qh5 Kf8 12.Ng6 hg6 13.Qh8 gf5 14.Rf5+/–) 10.fe5 Ne5 11.d3 (11.Be2 Nc8=) 11...Bh5 (11...Qb6!?=+) 12.Qh5= g6 13.Ng6? (better is 13.Qe2!?=) 13...N5g6 (13...N7g6 14.Rf6 Bg7 15.Re6 Kd7 16.Qh3 Nf3 17.gf3 Bb2 18.Rg6 Kd8 19.Qh4 Ke8 20.c3–+) 14.Bf6–/+ Rg8 15.Qh7 0–0–0 (better is 15...Qb6 16.Nc3 Qe3 (< 16...Qb4 17.Rab1 Qg4 18.Rb7+/–) 17.Kh1 Qh6 18.Qh6 Bh6–/+) 16.h3?? Qb6?? 17.Bd4–/+ Qb4 18.Bf6? Qc5–+ 19.d4 Qc2 20.Be7 Ne7 (better is 20...Be7 21.Na3 Qe4–+). yulio – RageofKlugman, ChessWorld.net, 2006.

5.f4 Ngf6 6.d3 e6 7.a3 a5 8.h4 h5 9.Nf3 ab4 10.ab4 (10.Nd4!?–/+) 10...Bb4–+ 11.Nbd2 (11.c3 Ra1 12.Ba1 Be7–+) 11...Ng4 12.Bg7 Ne3 13.Qb1 Rg8 14.Bd4 Ra1 15.Ba1 Qa5 16.Qc1 (16.Bd4 Ng2 17.Kd1 c5–+) 16...Nc2! 17.Qc2 Qa1 18.Bd1 (18.Qd1 Qd1 19.Kd1 Rg2 20.Ne1–+) 18...Rg2 19.Rg1 (19.Qa4 Qa4 20.Ba4 Bd3–+) 19...Bd2 (better is 19...Rg1!? 20.Ng1 Nc5 21.Kf2 Bd3 22.Nb3–+) 20.Kf1 Rg1 1–0. mikebaldini – sui_generis, gameknot.com, 2014.

5.f4 Bg6 6.d3 (6.Nf3 e6=) 6...e6 7.a3 Ngf6 8.Nf3 Bh5 9.Nbd2 Bd6 10.h3 Bf3 11.Nf3 Qe7 12.Ne5 (12.0–0 c5=) 12...Bc7 (12...Bb4!? 13.c3 Bc5–/+) 13.Qd2 (13.0–0 Ne5 14.Be5 0–0=) 13...Ne5 14.fe5 (14.Be5!? Be5 15.fe5=+) 14...Nd7=+ 15.d4 f6 16.ef6 Nf6 17.Bf3 0–0 18.Qd3 e5 19.de5 Be5 20.0–0–0 Bb2 21.Kb2 Rfe8 22.Rhe1 Qe5 23.Qd4 Ne4 24.c4 dc4 25.Qe5 Re5 26.Rd7 b5 27.Kc2 a5 28.Rf1? (better 28.Rd4!? Nf6 29.Bc6=+) 28...ab4–/+ 29.ab4?? (better 29.Be4 Re4 30.Rff7 b3 31.Kc1–/+) 29...Ra2–+ 30.Kb1 Ra4 (30...Nc3 31.Kc1 Ra1 32.Kc2 Rf1 33.Kc3 Re3 34.Kd2 c3 35.Kc2 Rf2 36.Kc1 Ra2 37.Rd8 Kf7 38.Rd7 Kf6 39.Rd6 Ke5–+) 31.Rd8 (better 31.Be4!? Rb4 32.Kc2 g6 33.Bc6 Rb3+–) 31...Kf7 32.Be4 Ke7 33.Rff8 Rb4 34.Kc2 Ra4?? (34...Re6+–) 35.Rfe8 Kf6 (35...Kf7 36.Re5 Ra2 37.Kc1+–) 36.Rd6 Kf7 37.Re5 (37.Re5 Ra2 38.Kb1+–) 1–0. FeegLood (2710) – erindreki (2480), lichess.org, 2015.

5.f4 h6 6.Nf3= Ngf6 7.0–0 e6 8.a3 c5 9.b5 Be7 10.c4 0–0 11.Nc3 Rc8 12.Qb3 dc4 13.Bc4 Nb6 14.Be2 Ne4 Black intends c4. Exerts pressure on the backward pawn (14...Bd3!?+=) 15.Ne4= Be4 16.d3 Bd5 Black prepares c4 17.Qc2 c4 18.e4 cd3 19.Qd3 Bc4 20.Qe3 (20.Qd8 Rfd8 21.Rfe1 Be2 22.Re2 Nc4+=) 20...Na4 (20...Bc5 21.Bd4 Be2 22.Bc5 Bf1 23.Bf8 Bb5 24.Bb4–/+) 21.Rfd1 (21.Bd4 Be2 22.Qe2 Bc5=) 21...Nb2 (better is 21...Bc5!? 22.Bd4 Be2+=) 22.Rd8= Rfd8 23.Qc3 Na4 (23...Bc5 24.Kh1 Be2 25.Qb2 Bf3 26.gf3–+) 24.Qc2 (24.Qe1 Be2 25.Qe2 Nc3+=) 24...Bc5 (better is 24...Bb5!? 25.Qb3 Be2 26.Qa4 Rc4–/+) 25.Kf1= Be2 26.Ke2 Bd4 27.Qa4 Ba1 28.Qa7 Bb2 (better is 28...Rc2 29.Ke3 Bb2+=) 29.Qb7?? (29.Kf2 Rd7 30.a4+=) 29...Ba3 (better is 29...Rc2 30.Kf1 Rd1 31.Ne1 Bc3 32.Qc8 Kh7 33.Qc3 Rc3–+) 30.Ne5+/– Rc2 31.Kf3 f6 32.Qf7 Kh7 (32...Kh8!? 33.Ng6 Kh7+/–) 33.Qg6+– ½–½. mikebaldini (1620) – magnet_and_steel (1685), gameknot.com, 2015.

5.Bg4 Bg4 6.Qg4 Ngf6 7.Qg3 e6 8.a3 Rc8 9.Nf3 Ne4 10.Qh3 Ndf6 11.d3 Nd6 12.Nbd2 g6 (12...c5 13.Be5+=) 13.Qg3 (13.c4 dc4 14.dc4 c5+=) 13...Bg7= 14.Bf6 Bf6 15.Rb1 0–0 16.0–0 Nb5 Black intends d4 17.Rb3 Nc3 18.Re1 d4 (18...a5 19.d4 ab4 20.ab4=) 19.ed4+/– Bd4 20.Nd4 Qd4 21.Nf3 Qf6 (better is 21...Qg7!?+/–) 22.Ne5+– Nb5 23.Nd7 Qg7 24.Nf8 Rf8 25.c4 Nc3 (25...Nd4 26.Rbb1+–) 26.Qc7 (26.Qe3 Qf6+–) 26...Qf6 (26...Ne2!? 27.Kh1 Nd4+–) 27.Qb7 Rd8 28.Re3?? (better is 28.Qa7 Rd3 29.Qb8 Kg7 30.Rb2+–) 28...Nd1?? (better is 28...Ne4! 29.Rb1 Qf2 30.Kh1 Qe3 31.de4 Qe4+=) 29.Rf3+– Qg7 30.Qc6 (30.h3 Rf8 31.Rb1 Nc3+–) 30...Nc3?? (30...Qa1 31.h4 Ne3 32.Kh2 Nf1 33.Kh3 Nd2 34.Rf7 Kf7 (34...Nb3? 35.Rd7 Qf6 36.Rd8 Qd8 37.Qe6 Kf8 38.Qe4+–) 35.Qc7 Ke8 36.Qc6 Kf8 37.Qc5 Kg8–+) 31.h3 (31.Kf1 Nb5 32.Rb1 Na3+–) 31...Qe5? (better is 31...Ne2 32.Kf1 Qa1 33.Ke2 Qa2 34.Ke1 Qb3+/–) 32.Qb7+– Qe1 33.Kh2 Ne2 (33...Rf8 34.Rc3! Qc3 35.Qa7 Qe5 36.g3 Qh5+–) 34.Qf7 Kh8 35.Qf6 Kg8 36.Qd8 1–0. mikebaldini (1685) – aldrinjason (1700), gameknot.com, 2013.

4.Be2 e6

5.a3 a5 6.b5 a4 7.d3 (7.Nf3 Nf6+=) 7...Nf6 (7...Qa5 8.Nd2=+) 8.g4= Bg6 9.h4 h6 (worse 9...cb5 10.h5+–) 10.Nh3 Bd6 (10...cb5 11.f4=+) 11.Nf4 (11.g5!? hg5 12.hg5+=) 11...Bf4 (11...cb5 12.Ng6 fg6 13.Rg1=+) 12.ef4= h5 (better 12...d4!?=) 13.g5+– Nfd7 14.Bg7 Rh7 15.Bb2 cb5 16.Nc3 Qa5 17.Qd2 b4 18.ab4 Qb4 19.Ba3 Qd4 (19...Qa5 20.Rb1+–) 20.0–0 Na6 (20...Qb6 21.Rfb1 Qc6 22.Nb5+–) 21.Nb5 Qb6 22.Rab1 Qc6 23.Nd6 Kf8 24.f5 (24.Rb7?! Nac5 25.Rb5 d4+=) 24...ef5 25.Nf5 (25.Rb7?! Nac5 26.Rb5 Kg8+=) 25...Ke8 (better 25...Ndc5!? 26.Nd4 Qc8+–) 26.Nd4 Qc7 27.Qe3 Qe5 28.Qe5 Ne5 29.f4 Nc6 30.Nc6 bc6 31.f5 (31.f5 Bf5 32.Rf5+–) 1–0. FeegLood (2590) – skiver1 (2400), lichess.org, 2016.

5.d3 Bb4 6.c3 Bd6 7.Nd2 Nd7 8.g4 Bg6 9.c4 ½–½. PeterRs – nimzo1, ChessWorld.net, 2016.

4.Nf3 Qb6

5.a3 a5 6.b5 h6 7.a4 e6 8.Be2 Nf6 9.0–0 Bd6 10.c4 0–0 11.d4 dc4 12.Na3 Bb4 13.Nc4 Qd8 14.Ba3 Ba3 15.Ra3 cb5 16.ab5 Be4 17.Qa1 b6 18.Nfe5 Bb7 19.Rc1 Nd5 20.Bf3 g5 (20...Re8!?+/–) 21.Qb1 Qe7 22.Ra1 Qd8 23.Nf7 (23.Ra4!? Ra7+/–) 23...Rf7+/– 24.Qg6 Kf8 25.Qe6 (better is 25.Qh6 Rg7 26.Bg4+/–) 25...Rf6= 26.Qe4 Qe7 (26...Kg8 27.Qe5=) 27.Ne5 (27.Qe7!? Ke7 28.e4+=) 27...Kg7= 28.Qg4 Ra7 29.h4 Re6 30.hg5 hg5 31.Be4 Nd7 32.Nd7 (32.Bd5!? Bd5 33.Nc6 Bc6 34.bc6+=) 32...Re4+= (worse is 32...Qd7 33.Bf5 Kf6 34.Qh3+/–) 33.Qf3? (better is 33.Qf5!? Re6 34.Ne5+=) 33...Re6 (better is 33...Ne3!? 34.fe3 Qd7 35.Qg3–+) 34.Ne5 Nf4 (better is 34...Nc3! 35.Qg4 Nb5–/+) 35.Qg4 Ng2 (35...Ng6 36.Nc6 Bc6 37.bc6+=) 36.Nc6+= Bc6 37.bc6 Nh4? (37...Ne3 38.fe3 Rd6+= (38...Re3? 39.c7 Ra8 40.c8Q Rc8 41.Qc8+–)) 38.c7!+– Re4 (38...Rc7 39.Rc7 Combination) 39.c8Q Rg4 40.Qg4 b5? (40...Qf6+–) 41.Rc5 Kg6 (41...Kf8 42.Rb5 a4 43.Kh1+–) 42.Rac1 1–0. Lebel,Patrick (2180) – Astengo,Marcello (2090), Milan Crespi op, 2002. (=1.Nf3 d5 2.b4 c6 3.e3 Bf5 4.Bb2 Qb6)

5.a3 Nd7 6.c4 Ngf6 7.cd5 cd5 8.Be2 e6 9.Nc3 Be7 10.Nd4 Bg6 11.0–0 0–0 12.f4 a5 13.Na4 Qd8 14.b5 Nc5 15.f5 Na4 16.Qa4 ef5 17.Nf5 Bf5 18.Rf5 Qd6 19.Bf3 b6 20.Rf1 Rad8 21.Bf6 Bf6 22.Bd5 Be5? (better is 22...Rc8+/–) 23.Bf7+– Rf7 24.Rf7 Bh2 25.Kh1 Qh6 (25...Bg3 26.Qg4 Qh6 27.Qh3 Qg6+–) 26.Qg4 (26.Rf8! Rf8 27.Qc4 Qe6 28.Qe6 Rf7 29.Qf7 Kh8 30.Qe8) 26...Bf4+/– 27.Qh3 Qh3 28.gh3 Kf7 29.Rf4 Ke6 30.d4 Rd5 (30...Rc8!?+/–) 31.a4+– Rd7 32.Kg2 Rc7 (32...Kd5 33.Rf8+/–) 33.Rf8 Rc4 34.Rb8 Ra4 35.Rb6 Ke7 (35...Kd5 36.Ra6+–) 36.Rb7 Kf6 37.Ra7 Ra3 38.Kf3 Rb3? (better is 38...a4+–) 39.Ra5 g5 40.Ke4 h5 41.Ra6 Ke7 42.b6 g4 43.hg4 hg4 44.b7! Rb7 45.Rg6 Rb5 46.Rg4 Kf6 47.Rf4 Ke6 48.Rh4 Kf6 49.Rh6 Kg7 50.Rc6 Kf7 51.d5 Ke7 52.Ke5 Rb3 53.e4 Rh3 54.Rc7 Kd8 55.Rg7 Rh6 56.d6 Rh5 57.Kf6 Rh6 58.Rg6 Rh1 59.Ke6 Rh8 60.e5 Rf8 61.Rg7 Rh8 62.Ra7 Rh6 63.Kd5 Rh5 64.Kc6 Ke8 65.Ra8 Kf7+– 66.d7 1–0. Schmidbauer,Josef (1605) – Neugebauer,Ulrich, Niederbayernliga, 2003.

5.a3 Nf6 6.c4 dc4 7.Bc4 Bb1 8.Rb1 Ne4 9.0–0 e6 10.d4 Bd6 11.Nd2 Nd2 12.Qd2 Qc7 13.f4 0–0 14.Qc3 g6 15.Rbd1 b5 16.Bb3 Qe7 17.d5! f6 (17...ed5 18.Qg7#) 18.de6 Kh8?? (18...Kg7 19.e4 a5 20.e5 fe5 21.Qe3+–) 19.Qc2 (Better is 19.Rd6 a5 20.Rfd1 ab4 21.ab4+–) 19...Bc7 20.f5 g5 21.Qe2 a5 22.Qh5 Qg7 23.Rd4 ab4 24.Rb4 Bb6 25.Kf2 Bc5 26.Rg4 Rd8 27.Rg5! Rd2 28.Kf3 Rb2 29.Rg7 Kg7 30.Qf7 Kh8 31.Qf6 Kg8 32.e7 Rb3 33.Qf8# 1–0. Bonetti,Shane – Rival, 2000.

4.Nf3 Qd6

5.a3 Nd7 6.d4 g6 7.Nh4 (7.c4 Ngf6=) 7...Be4 (7...Be6 8.c4=) 8.f3 Ngf6? (better is 8...Bf5+=) 9.fe4+– Ne4 10.Bd3 Ndf6 11.0–0 Ng3?? (11...Bh6 12.Qe2 a5+–) 12.hg3 Qg3 13.Nf3 Ng4 14.Qe1 (14.Qd2 Bh6 15.Re1 0–0+–) 14...Qd6 (14...Qe1 15.Re1 (< 15.Ne1 Ne3 16.Rf3 Nd1+–) 15...f5 16.c4+–) 15.e4 (15.c4 f5+–) 15...de4 16.Qe4 f5 17.Qe1 Bg7 (17...Bh6 18.d5 Rf8 19.Bd4 Qd5 20.Qe2+–) 18.Nbd2 Bf6 (18...h5 19.Nc4 Qd5 20.Qe2+–) 19.Rd1 h5 20.Nc4 Qc7 21.Qe6 f4 (21...Qd7 22.Qd7 Kd7 23.Nce5 Be5 24.Ne5 Ne5 25.de5 Kc7+–) 22.Bg6 Kd8 23.d5 Ne3 24.dc6 Nd1 (24...Bd4 25.Rd4 Nd5 26.Rd5 Qd6 27.Rd6 Kc7 28.Qe7 Kb8 29.Qb7) 25.Rd1 Qd6 (25...Bd4 26.Rd4 Qd6 27.Rd6 Kc7 28.Qe7 Kb8 29.Qb7) 26.Rd6 ed6 (26...Kc7 27.Qd7 Kb8 28.Qb7) 27.Qd7# 1–0. pierre – Reacher, ChessWorld.net, 2005.

5.a3 Nd7 6.Nh4 Bg6 7.Be2=.

5.a3 Nf6 6.Nc3 (6.Be5 Qd8=) 6...e5 7.Ne2 Nbd7 8.Ng3 Bg6 (8...Bg4 9.h3 Be6 10.Ng5=) 9.c4 (9.d4 e4 10.Ne5 Qe6=) 9...e4 (9...dc4 10.Bc4 b5 11.Be2=) 10.c5 (10.Nh4 dc4 11.Bc4 Ne5 12.Be5 Qe5=) 10...Qc7 11.Nd4 a5 (11...h5 12.Nge2=) 12.Be2 a4 (12...b6!? 13.cb6 Qb6= (worse 13...Nb6 14.Rc1+–)) 13.h4 (13.0–0 b6 14.cb6 Qb6+=) 13...h6 14.Qc2 Ne5 15.Qc3 (15.0–0 Bh7+=) 15...Qd7 16.0–0–0 Neg4 (16...Nd3 17.Bd3 ed3 18.f3+=) 17.Rdf1 Nh5 (better 17...Be7+=) 18.Bd1 (18.Nh5!? Bh5 19.d3+–) 18...Ng3= 19.fg3 Be7 (19...Ne5 20.Be2=) 20.Rf4 (better 20.h5!? Bh7 21.Ne6 fe6 22.Qg7+–) 20...Ne5 (20...h5 21.Bg4 hg4 22.Rf2=+) 21.Bc2 (21.Be2 Nd3 22.Bd3 ed3=) 21...Bf6=+ 22.Rhf1 Rb8 (22...Nc4 23.Bd1=+) 23.Rf6= gf6 24.Rf6 Qe7 25.Rf1 (better 25.Rg6 Ng6 26.Nf5+=) 25...Nd3?? (better 25...f6=+) 26.Bd3+– Qe5 (26...Rg8 27.Be2+–) 27.Bc2 (better 27.h5 ed3 28.hg6+–) 27...0–0 (27...Rg8 28.h5 Qh5 29.Nf5+–) 28.g4 (better 28.Nc6!? Qc3 29.Ne7 Kh7 30.Bc3 Rbd8+–) 28...Qg3 (28...Rfe8+–) 29.Nf5 (29.Nf5 Qe1 30.Re1+–) 1–0. Magierski,Dariusz – Sedlacek,Milan, Ostrava Konik op–B, 2011.

4.Nf3 Nd7

5.a3 a5 6.Nh4 (6.b5 e6 7.Be2 Rc8 8.Nc3 e5 9.Rb1=; 6.Be2 ab4 7.ab4 Ra1 8.Ba1 e6 9.b5=) 6...Nh6 7.Nf5 Nf5 8.Bd3 e6 9.Bf5=.

5.a3 Qc7 6.Nh4 Bg6 7.c4 Ngf6 8.cd5 Bh5 9.f3=.

5.a3 Qc7 6.Nh4 Bg6 7.Be2 e5 8.Ng6 hg6 9.c4 f5 (9...dc4!? 10.Bc4 Nb6=) 10.cd5+/– cd5 11.Nc3 Ngf6 12.Rc1 Qd8 (12...Qb6 13.Qb3 Qe6 14.Nb5+/–) 13.Nb5 Rc8 14.Rc8 Qc8 15.Na7 Qb8 16.Nb5 Be7 17.0–0 e4 18.g3 (18.h3 g5 19.Qc2 Kd8+–) 18...Ne5 (18...Bd6 19.f4+/–) 19.Qb3 f4 (20.ef4 Qc8 21.fe5 Qh3 22.Bh5 Rh5 23.Re1 Ng4 (23...Qh2 24.Kf1 Qh3 25.Ke2 Qg4 26.f3 ef3 27.Qf3 Rh2 28.Ke3 d4 29.Nd4 Qg5 30.Kd3 Qd2 31.Kc4 Qe1 32.ef6 gf6 33.Bc3–+) 24.Nc7 Kf8 25.Bd4 Nh2 26.Ne6 Kg8 27.Ng5 Nf3 (27...Bg5?! 28.Qd5 Kh7 29.Qe4–/+) 28.Qf3 Qh2 (28...ef3? 29.Nh3 Rh3 30.Re3+–) 29.Kf1 ef3 30.Nf3 Qh3 31.Ke2 Qg4 32.Rc1 Rf5 33.Rc8 Kh7 34.Rc3 Bg5 35.Ke1 Qe4 36.Be3 Qf3 37.Bf4 Qh1 38.Ke2 Bf4 39.gf4 Rf4 40.b5 Qh2 41.Kd1 Rf2 42.Kc1 Qe5 43.Kb2 Rd2 44.Kb3 Qe2 45.Rh3 Kg8 46.Kb4 Qg4 47.Kc5 Qh3 48.Kb6 Qa3 49.Kc7 Rc2 50.Kb7 Qd6 51.Ka8 Qc7 52.b6 Ra2) 0–1. woschkat (2470) – ozewiezewoze (2210), net–chess.com, 2003.

5.a3 e6 6.Be2 Bg4 7.Nc3 Ngf6 8.0–0 Bd6 9.Nd4=.

5.a3 f6 6.Nh4 Be6 7.Be2 Bf7 8.Bh5 g6 9.Be2 e5 10.0–0 f5 11.Nf3 Bg7 12.d4 e4 13.Nfd2 Qc7 14.c4 Ngf6 15.cd5 Nd5 16.Nc3 N5f6 17.b5 0–0 18.bc6 bc6 19.Rb1 g5 20.Qc2 Qd6 21.Nc4 Qe7 22.a4 h5 (better is 22...Nd5!?+/–) 23.Ba3+– Qe6 24.Bf8 Rf8 25.Rb7 Nd5 26.Nd5 cd5 27.Nd2 h4 28.Rc1 g4 (28...f4 29.Qc6 Nf6 30.Qe6 Be6 31.Ra7+–) 29.Qc7 Be8 (29...Nf6+–) 30.Bb5 Rf7 31.Qc8 Kh7 (31...Nf8 32.Qe6 (32.Qe8?! Qe8 33.Be8 Rb7+–) 32...Ne6 33.Rb8+– (33.Be8?! Rb7 34.Bc6 Rc7+/–)) 32.Rc6 Qe7 33.Rcc7 Qe6 (33...g3 34.Bd7 gh2 35.Kh2 Qd6 36.Kg1 Bd7 37.Rd7+–) 34.Bd7 Bd7 35.Rd7 Rd7 (35...f4 36.Qd8 Rd7 37.Qd7 Qd7 38.Rd7+–) 36.Qd7 Qd7 37.Rd7 Kg6 38.Rd5 Bf6 (38...Bf8 39.Nc4 Kf6 40.Ra5+–) 39.Ra5 1–0. Fritz11 – jumbo, casual, 2013.

5.a3 Ngf6 6.Be2 Bg4 7.0–0 e6 8.Ne5 Be2 9.Qe2 =.

5.a3 Ngf6 6.Be2 h6 7.0–0 Qc7 8.c4 e5 9.cd5 cd5 10.Nc3 Rd8 (10...Qb6!?+=) 11.Rc1+– Qb8 12.Qb3 Bd6 13.Nb5 (13.Nd5 e4 14.Nd4 Bg4 15.Nf6 Nf6 16.Bb5 Bd7+–) 13...Be6 (13...0–0 14.Nd6 Qd6 15.Qc3+=) 14.Rc2 (14.Qa4 e4 15.Nd6 Qd6+–) 14...0–0 15.Rfc1 (better 15.Nd6!? Qd6 16.d4+=) 15...e4=+ 16.Nd6 ef3 17.Nf7 (17.Nb7 d4 18.Qa4 Ng4–/+ (worse 18...Qb7 19.Bf3 Nd5 20.Bd4+=)) 17...Rf7 (17...Ng4 18.g3 Rf7–+ (worse 18...fe2 19.Nd8 Nf2 20.Qc3–+; 18...Bf7?! 19.Bf3 d4 20.Bd5–/+; 18...Kf7?! 19.Bf3 Ngf6 20.Bd4=+)) 18.Bf3–/+ Ne5 19.Be5 Qe5 20.d4 Qd6 21.a4 (21.Qa4 Bf5 22.Rc5 a6–/+) 21...Bg4–+ 22.Bg4 Ng4 23.g3 Rdf8 24.f4 Re7 25.Re1 Rfe8 26.Rce2 Nf6 27.Kg2 Kh8 28.b5 Rc8 29.Rc2 Rc2 30.Qc2 Rc7 31.Qd1 (31.Qb2 Qe6 32.Kg1 Rc4–+) 31...Ne4 32.Re2? (32.Qb3 Rc3 33.Qb2 a5–+) 32...Rc3 (32...Nc3 33.Qd3 Ne2 34.Qe2–+) 33.Qe1 (33.Qb1–+) 33...Qa3 34.Kf3 (34.Qb1 Qa4 35.b6 ab6 36.f5–+) 34...Rc1 35.Ra2 (35.Qa5 Qd3 36.Qd8 Kh7 37.a5–+) 35...Qc3 (better 35...Qa2 36.Qc1 Qf2 37.Kg4 Qe2 38.Kf5 Qh5 39.Ke6 Qe8 40.Kd5 Nf6 41.Kc4 Qc8 42.Kd3 Qc1–+) 36.Qe2?? (better 36.Qc3 Nc3 37.Ra3–+) 36…Re1 (36...Re1 37.Qc2 Qe3 (worse 37...Re3 38.Kg2–+) 38.Kg4 Nc3–+ (worse 38...Qd4 39.Qc8 Kh7 40.Qf5 g6 41.Qf7 Qg7 42.Qg7 Kg7 43.Rc2–+)) 0–1. Williams,Barry – Dive,Russell, NZL Kapiti Chess Club Open Rapid, 1999.

5.a3 Ngf6 6.Nh4 Bg4 7.f3 Be6 8.Bd3 a5 9.b5=.

5.a3 Bg4 6.h3 (6.Be2 Ngf6 7.0–0 e6 8.Ne5 Be2 9.Qe2=) 6...Bf3 7.Qf3 e5 8.c4 e4 9.Qe2=.

5.a3 Nh6 6.c4 (6.Be2 Qc7 7.Nd4 e6 8.Nf5 Nf5 9.Bd3=) 6...e6 7.cd5 cd5 8.Nc3 Rc8 9.Rc1+=.

5.a4 Qc7 6.c4 e5 7.cd5 cd5 (7...Ngf6 8.dc6 bc6 9.b5+=) 8.Nc3+– Ngf6 9.Nb5 Qb8 (9...Qd8!? 10.Be5 Ne5 11.Ne5 Bd6 12.Nd6 Qd6 13.Bb5 Ke7+=) 10.Rc1+– Bd6?? (better 10...Bb4 11.Nc7 Kf8+–) 11.Rc8!! Ke7 (11...Qc8 12.Nd6 Double attack (12.Nd6 Decoy)) 12.Rb8 Rab8 (12...Bb8 13.Nh4 Bg4 14.Qc2+–) 13.Qb3 Be6 (13...Rbe8 14.Na7 Bb8 15.Nb5+–) 14.Nd6 Kd6 15.b5 Rhc8 (15...e4 16.Ba3 Kc7 17.Qc3 Kd8 18.Nd4+–) 16.Qb4 Nc5 (16...Kc7+–) 17.Be5 Kd7 18.Bb8 (18.Bb8 Nce4 19.Be5+–) 1–0. DEFFM – PERECVET, freechess.org, 2018.

5.b5 cb5 6.Bb5 (6.Nc3 Ngf6 7.Bb5 a6 8.Ba4 e6 9.0–0=; 6.Nh4 Be4 7.f3 e6 8.g3 Bg6 9.Bb5=) 6...a6 7.Be2 Rc8 8.Nd4 Bg6 9.f4=.

5.b5 Qb6 6.a4 (6.Nh4 Nh6 7.Nc3 e5 8.bc6 bc6 9.Nf5=; 6.Be2 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1=) 6...Nh6 7.a5 Qc7 8.a6 e6 9.Nd4=.

5.b5 e6 6.a4 (6.bc6 bc6 7.Nd4 Rb8 8.Bc3 Ne7 9.Nf5+=; 6.Nd4 Bg6 7.Be2 cb5 8.Nb5 a6 9.N5c3+=; 6.Be2 cb5 7.Bb5 Rc8 8.Nd4 Bg6 9.h4=; 6.a3 cb5 7.Bb5 a6 8.Be2 Rc8 9.Nd4=) 6...cb5 7.ab5 Ngf6 8.Be2 Qc7 9.Nc3=.

5.b5 Bg4 6.Be2 (6.h3 Bf3 7.Qf3 e5 8.Nc3 Qf6 9.Be2=; 6.bc6 bc6 7.Nc3 e5 8.Rb1 Rb8 9.Be2+=) 6...Ngf6 7.0–0 Qc7 8.Nc3 e5 9.h3=.

5.b5 Nh6 6.a4 (6.Be2 Qc7 7.Nc3 e5 8.Rb1 Bd6 9.Nh4=) 6...Qc7 7.Nh4 e5 8.Nf5 Nf5 9.Nc3=.

5.c3 Ngf6+= 6.c4 e5 7.Ne5 Ne5 8.Be5 Bb4 9.Qb3 Bd6 10.Bd6 (10.Bf6 Qf6 11.d4 0–0+=) 10...Qd6 11.cd5 (worse is 11.Qb7 Rb8 12.Qa7 Bb1–+ (12...Rb1?! 13.Rb1 Bb1 14.Qa8 Qd8 15.Qc6 Kf8 16.Qb5=)) 11...0–0 (11...Nd5 A) 12.Qb7? Rb8 13.Qa7 Bb1–+ (13...Rb1?! 14.Rb1 Bb1 15.Qa8 Qd8 16.Qc6 Kf8 17.Bc4=); B) 12.Bc4=) 12.Nc3 (12.dc6 bc6 13.Qa3 c5+=) 12...Nd5 13.Nd5 (13.Qb7? Nb4 14.Bc4 Rad8–+) 13...cd5 14.Be2 b6 15.0–0 d4 16.Rfc1 de3 17.de3 Rac8 18.h3 (18.Rc8 Rc8 19.Rd1 Qe7=) 18...Be6 (18...Qg6 19.Kh2+=) 19.Qb2 h6 20.a4 Rc1 21.Rc1 Rc8 22.Rd1 Qc5 23.Ba6 Qc3? (better is 23...Qh5 24.Rd4 Rc5=) 24.Qb5?? (better is 24.Rd8! Kh7 25.Qb1 f5 26.Bc8 Bc8 27.g4+–) 24...Bc4–+ 25.Bc8?? (25.Rd8 Rd8 26.Qc4 Qa1 27.Kh2 Qe5 28.g3–+) 25...Bb5 26.Rd8 (26.ab5 Qc8 27.Ra1 Qd7–+) 26...Kh7 27.ab5 Qc1 (27...Qc1 28.Kh2 Qc7 29.g3 Qd8–+) 0–1. Morozevich,A (???) – wally, ICC, 1999.

5.Nc3 e5 6.d3? (better is 6.b5!?= A) 6...Bd6 7.Be2 (7.Rb1 Ngf6 8.bc6 bc6 9.Be2 0–0 10.a4; 7.a4 Ngf6 8.Be2 0–0 9.0–0 Qc7 10.bc6; 7.bc6 bc6 8.Rb1 Ngf6 9.Be2 Rb8 10.0–0; 7.a3 Ngf6 8.Be2 0–0 9.bc6 bc6 10.Rb1) 7...Ngf6 8.0–0 Qc7 9.Nh4 Be6 10.bc6; B) 6...Ngf6 7.Be2 cb5 8.Nb5 a6 9.Nc3 b5 10.0–0; 6.a3 Ngf6 (6...Bd6 7.Be2 Ngf6 8.0–0 Qc7 9.d3 0–0 10.b5) 7.Be2 Bd6 8.0–0 Qc7 9.h3 0–0 10.Nh4) 6...Bb4–/+ 7.a3 (7.Be2 Ngf6 8.0–0 Qa5–/+) 7...Ba5–+ 8.Be2 (8.Nd2 Ngf6–+) 8...Ngf6 (better is 8...Qb6!? 9.Rb1 Qb2 10.Rb2 Bc3 11.Nd2 Bb2–+) 9.0–0 0–0 10.h3 Re8 11.g4 Be6 12.Ng5 Qb6 13.Rb1 Qd8 14.Ne6?? Re6–/+ 15.f4 ef4–+ 16.ef4 Re3 17.Rf3 Qe7–+ 18.Kg2 Re8 19.Re3 Qe3 20.Bc1? Qd4 21.Na2 Bb6 22.Qf1 Qc5 23.g5–/+ Qc2 24.Rb2+= Qc5 25.gf6 Nf6 26.Rd2 d4 27.Nb4 a5–/+ 28.Nc2 Bc7 29.f5? Qe5 30.Qf3? Nd5 31.Kf2?? b5 32.Bb2?? c5 33.Ne1?? b4 34.ab4 cb4 35.Ng2 a4 36.Bd1 Nc3 37.Bc3 bc3?? 38.Re2 Qg3!–/+ 39.Qg3 Bg3–+ 40.Kf1 Ra8 41.Ba4–/+ Kf8 42.Bc2 f6 43.Re4 Be5 44.Kf2 Ra2 45.Ne1 h6 46.Kf3+= Ke7 47.Re2 Kd6+= 48.h4 Ke7 49.Kg4 Kf8 50.Nf3 Rb2 51.Ne5 fe5 52.Kf3 Kf7 53.Ke4+= Kf6 54.Rg2+/– Rb5 55.Rg6 Kf7 56.Re6 g5 57.Rh6 g4 58.Rg6 Rb2 59.Ba4 Re2 60.Kd5 c2 61.Bc2! Rc2 62.Ke5 Ra2 63.Kd4 g3 64.Rg3 Ra4 65.Ke5 Rh4 66.d4 Rh6 67.Rg6! Rh8 68.Rf6 Ke7 69.d5 Ra8 70.d6 Kd7 71.Rf7 Ke8 72.Ke6 Ra6 73.Re7 Kf8 74.f6 Ra8 75.Rf7 Kg8 76.d7 Ra6 77.Ke7 Ra8 78.Rg7+– Kh8 79.Rg3 Kh7 80.d8Q Ra7 81.Qd7! Rd7 82.Kd7 Kh8 83.Ke7 Kh7 84.Kf7 Kh6 85.Kg8 Kh5 86.f7 Kh4 87.Rg1 Kh3 88.f8Q Kh2 89.Rg6 Kh1 90.Qh6 1–0. philstar99 – urko, ChessWorld.net, 2009.

5.c4 dc4 6.Bc4 e6 7.0–0 Ngf6 8.a3 Nb6 9.Be2 Bd3 10.Ne1 Be2 11.Qe2 Be7 12.Nc3 0–0 13.d4 Nfd5 14.Ne4 Na4 15.Nd3 a5 16.Ndc5 ab4 17.Nb7 (Better is 17.ab4!? b5 18.Qd2=) 17...Qb8 18.Nec5 Nc5 (Better is 18...Nb2!? 19.Qb2 Ra7–/+) 19.Nc5= ba3 20.Ba3 Qb5 21.Qf3 Bc5 22.Bc5 (< 22.dc5 Nc3 23.e4 Ne2 24.Kh1 Nd4=+) 22...Ra1 23.Ra1 Qb2 24.Re1 Ra8 25.h3 ½–½. Furlong,Kevin – Taschner,Peter (2030), Bayern–chI Bank Hofmann 2nd, 1998.

5.c4 dc4 6.Bc4 e6 7.0–0 Ngf6 8.a3 Bd6 9.d3 =.

5.c4 dc4 6.Bc4 e6 7.a3 b5 (7...Ngf6 8.0–0 Bd6 9.d3=) 8.Be2 a5 9.Nc3 (9.Nd4=) 9...ab4 10.ab4 Ra1 11.Qa1 Bb4 12.Nd4 Ne7 13.0–0 0–0 14.Nf5 Nf5 15.Qb1 Bc3 16.Bc3 f6 17.Qe4 Qe7 18.Qc6 Nc5 19.Bb4 Qb7 20.Qc5 Rc8 21.Qb5 Qe4 22.d4 Nh4 23.Bf3 Nf3 24.gf3 Qf3 25.Bd6 h6 26.Bg3 h5 27.Qd7 Rc6 28.h4 e5 29.d5 Rc4 30.Ra1 Kh7 31.Qf7 Rc5 (31...Rc2+–) 32.d6 Rd5 33.d7 Ra5 (33...f5 34.e4! Rd3 35.ef5 Rd6+–) 34.Ra5 (34.Ra5 Qe2 35.d8Q Qe1 36.Kg2 Qf2 37.Bf2 e4 38.Qh5) 1–0. Olsen,R – Larsen,H, Karasjok, 2005.

5.c4 dc4 6.Bc4 e6 7.Nd4 Nb6 8.Nf5 ef5 9.Bb3 Qg5 10.0–0 Bb4 11.f4 Qg6 12.Rf3 Nf6 13.Rg3 Qh6 14.Qc2 Ng4 15.Bf7?? (Better is 15.h3 Qh4 16.Rf3=) 15...Kf7–+ 16.Qf5 Nf6 17.e4 Qh5?? (Better is 17...Nc4 18.Rb3 Be7–+ (18...Nb2 19.Rb4 Rhe8 20.Rb2+=)) 18.Rg7!!+– Ke8 19.Qe6 Kf8 20.Qf6 Ke8 21.Nc3 Rd8 22.Rg5 Bc5 23.Kh1 (23...Qg5 24.Qg5+–) 1–0. Adams,Jonathan (1625) – Gold,Hamish R, NZL–ch Major op, 1999.

5.c4 Qc7 6.Be2 (6.cd5!? cd5 7.Nc3+/–) 6...e5= 7.0–0 (7.cd5 Bb4 8.Qb3 Be7=) 7...e4 (7...dc4 8.Bc4 b5 9.Bb3+=) 8.Nh4 (8.Nd4 Nh6+=) 8...Bg6 (8...Be6 9.cd5 cd5 10.f4=) 9.Ng6 (9.cd5 cd5 10.Nc3+= (worse is 10.Ng6 hg6 11.h3 Bb4=)) 9...hg6= 10.h3 Bb4 11.Bg7 Rh7 12.Bc3 Bd6 13.cd5 cd5 14.d3 Ne7 15.de4 de4 16.Bd4 Nf5 17.Nd2 Nd4 18.ed4 Nf6 19.Rc1 Qb6 20.Qa4 Kf8 21.Qb5 (better is 21.Rfd1!?+=) 21...Qb5+= 22.Bb5 Kg7 (22...Bf4 23.Rc2+=) 23.Rfe1= a6 24.Ba4 b5 25.Bb3 Re8 26.Rc6 Bb4 (26...Bf4 27.Re2 a5 28.Bc2 Bd2 29.Rd2=) 27.Rd1 (27.Re2 a5+=) 27...a5 28.Rc7 Rh5?? (better is 28...Rf8!?=) 29.Bf7 (better is 29.Rf7 Kh6 30.Rf6+–) 29...Re7+/– 30.Re7 Be7 31.Be6 Rh8 32.d5 Rd8 (32...a4!?+/–) 33.Nb3+– a4 34.Na5 (better is 34.Nd4+–) 34...Nd7? (better is 34...Rd6+–) 35.Nc6 Nc5 36.Bg4 (36.Bg4 Re8 37.d6+–; 36.Ne7?! Ne6 37.d6 Kf6+/–) 1–0. Fournier,Frederic – tumaja, Active, 2004.

5.c4 f6 6.Be2 (6.Nd4 Nh6=) 6...e5 (6...dc4 7.Bc4 Nb6 8.Be2=) 7.a3 Bd6 8.Qb3 Ne7 9.Nc3 Be6 10.0–0 0–0 11.cd5 Nd5 12.e4 Nc7 (12...Nf4 13.Bc4 Bc4 14.Qc4 Kh8 15.d4=) 13.Bc4 Qe7 14.Be6 (14.d4 Kh8=) 14...Qe6 15.Qe6 Ne6 16.Rad1 Nb6 (16...a5 17.b5+=) 17.d4= Nc4 18.de5 Be5 19.Ne5 fe5 20.Na4 (20.Bc1 Rad8=) 20...Nb2 (better is 20...a5 21.Rc1 Nd2–/+) 21.Nb2= Rac8 (21...Nf4 22.Nc4 Ne2 23.Kh1=) 22.Nd3 (22.Nc4 Ng5+=) 22...Ng5 (22...Rfe8 23.Ne5 Nf4 24.Nc4+/–) 23.Ne5 Ne4 24.Rd7 Rcd8? (better is 24...Rfe8!? 25.f4 Rb8+/–) 25.Rb7+– Nf2 (25...a6+–) 26.Nf3?? (better is 26.Ra7 Rd2 27.Nf3 Rf3 28.gf3 Nh3 29.Kh1+–) 26...Nd3+/– 27.Ra7 Ra8 28.Ra8 Ra8 29.Nd4 Ra3 30.Nc6 Ra8 (30...g5 31.b5+/–) 31.Rd1 (31.b5 g6+–) 31...Nf4 32.g3 Ne6 33.Rb1 Nc7 (33...Ra2+–) 34.b5 (34.b5 Ra2 35.b6+–) 1–0. Diederich,Hauke – Soberski,Mario, Schleswig Holstein–ch U14, 1999.

5.d3 Qc7 6.Be2 0–0–0 7.0–0 f6 (7...e5 8.b5=) 8.a4 (8.Nd4 g6 9.g4=) 8...e5= 9.b5 Ne7 10.c4 (10.Nbd2=) 10...d4 (10...dc4 11.dc4 Nc5 12.Nbd2=) 11.e4 (11.ed4!? c5 12.de5 Ne5 13.Ne5 fe5 14.a5+/–) 11...Be6= 12.Nbd2 g5 13.h3 g4 14.hg4 Bg4 15.a5 (15.Nd4!? Be2 16.Ne2+=) 15...h5 16.Ba3 h4 17.Nh2 (17.Nd4 Be2 18.Ne2 h3=) 17...Be2+= 18.Qe2 h3 19.g3 Bh6?? (better is 19...c5+=) 20.Be7+– Rdg8 21.Rfb1 c5 (21...a6 22.ba6 ba6 23.Ndf3+–) 22.b6! ab6 23.ab6 Nb6 24.Bf6 Rh7 25.Rb6! Qb6 26.Ra8 Kd7 27.Rg8 Qf6 28.Qg4 Kd6 29.Nb3 b6 30.Rg6 Qg6 31.Qg6 (31.Qg6 Ke7 32.Qh7 Kd8 33.Qh6+–) 1–0. Fournier,Frederic – AriR, Active, 2007.

5.d3 Bg4 6.Be2 (6.h3 Bf3 7.Qf3 Ngf6=) 6...Bf3 (6...e6 7.Bc3=) 7.Bf3 e5 (7...Ngf6 8.Nc3=) 8.a3+= Ngf6 9.0–0 (9.Nd2 a5 10.Bc3 Bd6=) 9...Bd6 (9...a5 10.b5+=) 10.c4 Bc7 (10...dc4 11.dc4 Qe7 12.e4+=) 11.Nc3 (11.cd5 Nd5 12.Nc3 N7f6+–) 11...e4+= 12.de4 de4 13.Ne4 (13.Be4 Ne4 14.Ne4 Bh2 15.Kh2 Qh4 16.Kg1 Qe4+=) 13...Ne4 14.Be4 Be5 (better 14...Bh2!? 15.Kh2 Qh4 16.Kg1 Qe4+=) 15.Be5 (15.Bd4 Bd4 16.ed4 0–0+–) 15...Ne5 16.Qc2 0–0 (better 16...Qh4!?+–) 17.Bh7 Kh8 18.Rad1 (18.Be4 Qe7+–) 18...Qh4 19.Be4 f5 (19...Qh5 20.Bd3+–) 20.Bf5 Qg5 (20...Qc4 21.Rd4 Qc2 22.Bc2+–) 21.e4 Nf3 22.Kh1 Nh4 23.f4 Qf6 (23...Qh6 24.Rd7 Rab8 25.Qd3 Nf5 26.ef5+–) 24.Bg4 Rad8 (24...Qg6 25.h3 Qh6 26.g3+–) 25.g3 Ng6 (25...Rd1 26.Rd1 Ng6 27.e5 Ne5 28.fe5 Qe5 29.Kg2+–) 26.e5 Qf7 (26...Ne5 27.fe5 Rd1 28.Rd1 Qe5+–) 27.Bh5 Rd1 (27...b6 28.Bg6 Qe6 29.f5+–) 28.Rd1 (28.Rd1 Qe8 29.Bg6+–) 1–0. Janek – Draman, internet, 2018.

5.d4 e5 6.a3 e4 7.Ne5 =+.

5.d4 e6 6.a3= a6 7.c4 dc4 8.Bc4 b5 9.Be2 Nb6 10.Nc3 f6 11.0–0 Bd6 12.Nh4 Bg6 13.Ng6 hg6 14.f4 f5 15.g3 Nf6 16.Qb3 Qe7 17.Bf3 Nbd5 18.Rae1 Kf7 19.e4+/– fe4 20.Ne4 Ne4 21.Re4 Rh7? 22.Bg4+– Rah8 23.Re6 Qd8 24.Rf2 Re8 25.Rfe2 Rhh8 26.Qc2 Re6 27.Be6 Kf6 28.Qc6 (28...Qc7 29.Qd5+–) 1–0. Kjaerstad,Eivind J – Marthinsen,Magne, corr veteran NM NOR, 1993.

5.d4 Ngf6 6.c4 dc4 7.Bc4 e6 8.a3 h6 9.0–0 Be7 10.Nc3 Nb6 11.Bd3 Bd3 12.Qd3 Nbd5 13.Rfd1 0–0 14.Bc1 Qc7 15.e4 (Better is 15.Ne2+=) 15...Nc3–/+ 16.Qc3 Ne4 17.Qd3 Nf6 18.Ne5 Bd6 19.f4 Rad8 20.Qf3 Nd7 21.Be3 Ne5 22.de5 Be7 23.Qf2 b6 24.Rac1 Rd1 25.Rd1 Rd8 26.Rd8 Qd8 27.Qd2 Qd2 28.Bd2 c5 29.Kf2 cb4 30.ab4 b5 31.Ke3 Kf8 32.Kd4 Ke8 33.g4 Kd7 34.Kc3 Kc6 35.h4? a6 36.g5 hg5 37.hg5 g6 38.Kd4 Bd8 39.Bc3 Bb6 40.Ke4 Bf2 41.Bd2 Bg1 42.Bc3 Bb6 43.Bd2 Kd7 44.Bc3 Ke7 45.Bd2 Kd7 46.Bc3 Kc6 ½–½. Grits – paratrpr, Live Game Caissa's Web, 2004.

5.Be2 Qb6 =.

5.Be2 e5 6.Ne5 (6.0–0 Bd6 7.c4 dc4 8.Bc4 Qf6 9.a3+=) 6...Ne5 7.Be5 Qg5 8.0–0 Bb4 9.f4 =.

5.Be2 f6 6.d3 e5 7.Nbd2 Bd6 8.Nh4 Be6 9.Bg4 Bf7 (9...Qe7 10.a3=) 10.Nf5+= Bf8 11.c3 (11.0–0!?+=) 11...g6= 12.Ng3 f5 13.Bf3 h5 14.h4 Be7 15.c4 Bh4 16.cd5 cd5 17.Rc1 Bg3 18.fg3 Qg5 19.Nf1 (19.Qe2=) 19...h4 (better 19...Ngf6=+) 20.Qa4+– Be6?? (better 20...a6 21.b5 Qf6+–) 21.Be5+– Rh7 22.Rc7 d4 (22...Ne7 23.Rh4 Rh4 24.gh4 Qh4 25.g3+–) 23.Bd4 (23.Bb7 Rd8 24.Bd4 Kf7+–) 23...Ne7 (23...Ngf6 24.Bb7 (worse 24.Rb7 Rd8+–) 24...Rd8 25.Bf3+– (worse 25.Ba7 Nd5 26.Rc4 Kf7+–)) 24.Rb7 Rd8 25.b5 Nd5 26.Qc4 h3 (26...Nf8 27.gh4 Qh6 28.Qc6 Rhd7 29.Rd7 Rd7+–) 27.Bd5 hg2 (27...Bd5 28.Qd5 Nf8 29.Qc6 Rhd7 30.Rh3 Kf7 31.Rd7 Rd7 32.Qc4 Ke8+–) 28.Rh7 g1Q 29.Rh8 Ke7 (29...Kf7 30.Be6 Ke7 31.Rh7 Ke8 32.Bd7 Rd7 33.Qg8) 30.Qc5 (30.Be6 Q5g3 31.Kd2 Q1g2 32.Kc3 Qe1 33.Kb3 Qb7 34.Rh7 Kd6 35.Bd7 Qd5 (35...Rd7?? 36.Qc5 Ke6 37.Qe5) 36.Be5 Ke5 37.Re7 Kf6 38.Re6 Qe6 39.Qe6 Kg5 40.Qe7 Kg4 41.Nh2 Kg3 42.Qd8 Qb1 43.Kc3 Qa1 44.Kb4 Qb2 45.Kc5 Qc3 46.Kd6 Qd3 47.Kc7 Kh2 48.Qh4 Kg2+–) 30...Kf7 31.Rd7! Rd7 (31...Rd7 32.Qf8) 32.Rf8 1–0. Gu00 – Gu22, internet, 2018.

5.Be2 f6 6.Nd4 Bg6 7.Ne6 Qc8 (7...Qb8 8.c4 Qd6 9.Nf8 Nf8 10.c5+=) 8.0–0 Bf7 9.Bg4 h5 (9...Nh6 10.Bh3+=) 10.Bh3 g5 (10...Qb8!?+–) 11.Ng5!+– (11.Nf8?! g4 12.Nd7 Qd7+=) 11...fg5 (better 11...Nh6+–) 12.Bh8?? (better 12.Bd7 Qd7 13.Bh8+–) 12...g4+= 13.Bg4 hg4 14.Qg4 Ndf6 (14...Qc7!?+–) 15.Qc8 Rc8 16.Nc3 (16.f4 e6 17.a3 Bg6+–) 16...e5 (16...Bg6 17.Rac1+–) 17.a3 Bd6 (17...c5 18.f4 e4 19.bc5 Bc5 20.Ne2+–) 18.f4+– Ke7 19.Rae1 Nh6 (19...e4!?+–) 20.Bf6 Kf6 21.fe5 Ke5 22.d4 Ke6 23.e4 Kd7 24.e5 Be7 25.Rf7! Nf7 26.e6 Ke8 27.ef7 Kf7 28.g3 Bf6 (28...a5 29.Rf1 Kg6 30.ba5+–) 29.Rf1 (29.Ne2 b6+–) 29...Re8 30.Na4 Kg7 31.c3 Re2 32.Nc5 (32.Rf2 Re1 33.Kg2 b6+–) 32...Ra2 (32...Re3!? 33.Nd7 Bd8+–) 33.Nb7 (33.a4 Ra3 34.Nb7 Rc3+–) 33...Ra3 34.Nd6 Bg5 35.Rf3 (35.c4 dc4 36.Nc4 Rd3+–) 35...Bd2 36.b5 Bc3? (36...cb5 37.Nb5 Ra1 38.Kg2 Ra2+–) 37.bc6 (37.Nf5 Kf6 38.bc6 Ra1 39.Rf1 Rf1 40.Kf1 Ba5+–) 37...Bd4 38.Kg2 Ra2 39.Kh3 Rc2 (39...Bb6 40.c7! Bc7 41.Ne8 Kh6 42.Nc7+–) 40.Nf5 (40.Nf5 Kg8 41.Nd4+–) 1–0. DEFFM – receficebrumbrum, freechess.org, 2019.

5.Be2 Ngf6 6.a4 Qc7 7.b5 e5 8.Nh4 (8.a5 cb5 9.Bb5 Bd6=+) 8...Be6–/+ 9.0–0 Bd6 10.c4 e4 (10...0–0 11.Na3–/+) 11.f4 ef3 12.Nf3 0–0 13.bc6 (13.Na3 Ng4 14.h3 Nh2 15.Nh2 Bh2 16.Kh1 Be5=) 13...bc6 14.Qc2 Ne4 (14...Rab8 15.cd5 Bd5 16.Nc3 Bf3 17.Rf3 Bh2 18.Kh1–/+) 15.cd5= Bd5 (15...cd5 16.Qc7 Bc7 17.Nc3=) 16.Nc3 f5 (better 16...Nc3!? 17.Qc3 f6=) 17.Nd5+– cd5 18.Qc7 Bc7 19.d3 (19.Bb5!? Rad8 20.d3+–) 19...Nef6+= 20.Nd4 Ng4? (better 20...Rfb8 21.Ba3 f4=) 21.Nf5+– Nh2? (21...Ngf6+–) 22.Ne7 Kh8 23.Rf8 Rf8 24.Nd5 Bg3 (24...Bb8 25.Rc1 Re8 26.d4+–) 25.Nf4! Rf4 (25...Bf4 26.ef4 Combination) 26.ef4 Bf4 1–0. GuestJVKF – GuestRFXD, freechess.org, 2020.

5.Be2 Ngf6 6.a4 h6 7.0–0 Qc7 8.b5 e5 9.d4 e4 10.Nh4 Bh7 11.g3 g5 (11...Rc8 12.Ba3=+) 12.Ng2= Bg6 13.c4 Bd6 (13...dc4 14.Bc4 cb5 15.Bb5=) 14.c5 Be7 15.Nc3 h5 16.a5 h4 17.b6 Qb8 18.gh4 gh4 19.Nf4 Bf5 20.Kh1 Nf8 21.a6 (21.f3=) 21...Ne6?? (better 21...ab6 22.cb6 ba6–/+) 22.ab7 (22.Nfd5 Nd5 23.Nd5 cd5 24.Qa4 Kf8 25.ab7 Qb7+–) 22...Qb7 23.Ne6 Be6 24.Qa4 Kd7 (24...a5+=) 25.Ba6 (25.Qa7 Ra7 26.Ra7 Qa7 27.ba7=) 25...Qb8= 26.Bb5 cb5 (better 26...Qb7 27.Ba6 Qb8=) 27.Qb5+– Kd8 28.b7 Nd7? (28...Bc8 29.Qa5 Ke8 30.Qa4 Kd8 31.ba8R Qa8 32.Qa7 Qa7 33.Ra7 Rg8+–) 29.Qc6 (29.ba8R?! Qa8 30.Rg1 Qb8+–; 29.ba8B?! Qa8 30.f3 Bh3+–; 29.ba8N?! Qa8 30.f3 Bh3+–; 29.ba8Q?! Qa8 30.f3 ef3 31.Qa5 Ke8 32.Qa7 Qc8+–) 29...Bg4 Threatening mate... how? 30.f3! (30.ba8B?? Bf3 31.Kg1 Rg8 32.Qg6 Rg6; 30.ba8R?? Bf3 31.Kg1 Rg8 32.Qg6 Rg6; 30.ba8Q?? Bf3 31.Kg1 Rg8 32.Qg6 Rg6; 30.ba8N?? Bf3 31.Kg1 Rg8 32.Qg6 Rg6) 30...Bf3 (30...ef3 31.ba8Q) 31.Rf3! ef3 (31...Rh6 32.Qd5 Rh5 33.Qe4 Qb7 34.Qb7 Rb8 35.Qa7 Ke8+–) 32.ba8Q (32.ba8Q Rg8 33.Ra7 Rg1 34.Kg1 f2 35.Kf2 Ke8 36.Qb8 Bd8 37.Qd7 Kf8 38.Qf7; 32.ba8B Qb2 33.Rg1 Qc3–/+) 1–0. GuestDTRL – GuestXGCV, freechess.org, 2020.

5.Be2 Ngf6 6.d3 Bg4 7.Nbd2 e6 8.a3 Nb6 9.c4 dc4 10.dc4 Be7 11.h3 Bf5 12.c5 Nc8 13.Ne5 0–0 14.Ndf3 Qc7 15.0–0 Rd8 16.Bd4 a6 17.Ng5 Bg6 18.Bd3 Nd7? (Better is 18...Bd3 19.Nd3 Rd5+=) 19.Bg6+– Ne5 20.Bh7 Kf8 21.Nf3 Bf6? 22.Rc1?? g6? 23.Ne5+– Be5 24.Qf3?? Kg7 25.Be5 Qe5 26.Qg4 Kh7?? 27.Qh4+– Kg7 28.Qd8 (28...Rb8 29.Rfd1+–) 1–0. Hansen,Soeren – Nickel,Sebastian, Schleswig Holstein–chB U18, 2001.

5.Be2 Bg4 6.Nc3 Bf3 (6...Ngf6 7.0–0+=) 7.gf3 (7.Bf3 Ngf6+=) 7...e5 8.d4 Bd6 (8...Bb4 9.de5 Ne5 10.Qd4=) 9.de5 Ne5 10.f4 Nd7 (10...Ng6!? 11.Nd5 N8e7+=) 11.Nd5+/– cd5 (11...Ne7!? 12.Bg7 Rg8 13.Nf6 Nf6 14.Bf6 Bb4 15.c3 Ba5+/–) 12.Bg7+– Bb4 13.c3 Bc3 (13...Ngf6 14.cb4 (14.Bh8?! Bc3 15.Kf1 Ba1 16.Qa1 Qb6+=) 14...Rg8 15.Rg1+–) 14.Bc3 Ngf6 15.Rg1 Rc8 16.Rc1 Rc3 (16...Qb6 17.Rg5+–) 17.Rc3 Ne4 (17...Qa5 18.Qd2 Ke7 19.Bf3+–) 18.Rc2 Qa5 19.Kf1 Ke7 20.Rg7 Kf6 (20...Re8+–) 21.Qd4 Ke7 22.Rf7! Kf7 23.Qh8 Ndf6 (23...Nef6 24.Qc8 Qb4 25.Bd3 Qb1 26.Kg2+–) 24.Qc8 Qb6 (24...Qa3+–) 25.Rc7 Kg6 26.Rb7 Qd6 27.Qh3 h6 28.f5 Kg5 29.Rg7 1–0. Heini – chessenemy, internet, 2016.

5.Be2 h6 6.0–0 Ngf6 7.a4 e6 8.b5 c5 9.c4 Bd6 10.d4 dc4 11.Nbd2 cd4 (11...c3 12.Bc3 0–0 13.a5=) 12.Nc4+= Nb6 (12...Bb4 13.Nd4 Be4 14.Rc1+=) 13.Nd6+– Qd6 14.a5 Nbd5 15.Ba3 (15.Qd4 Qb4+–) 15...Qd8 16.Qd4 Ne7 (16...a6 17.Ne5 Qa5 18.ba6 ba6 19.Bd1+–) 17.Qa4 0–0 18.Rfd1 Ned5 (18...Qe8!?+–) 19.Bf8 Kf8 (19...Qf8 20.Qd4+–) 20.g4 (20.Nd4 Bg6+–) 20...Bg4 (better 20...Bh7+–) 21.e4 Ne4 (21...Rc8 22.ed5 ed5 23.Ra3+–) 22.Qe4 Bf3 23.Bf3 Qg5 24.Kh1 Nf4 (24...Qf6+–) 25.Qb7 Re8 26.Bc6 Nh3 Threatening mate: Nxf2 27.Qa7 Rc8 28.a6 Kg8 29.Bg2 Nf4 Threatening mate... how? 30.Qb7 Rc2 (30...Rf8 31.a7 f5+–) 31.a7 Rf2 32.a8Q Kh7 33.Be4 f5 34.Qf7 Qh4 Threatening mate... how? 35.Qag8 1–0. DEFFM – GuestVSDR, freechess.org, 2020.

5.Be2 h6 6.0–0 Ngf6 7.c4 Qc7 8.cd5 Nd5 9.b5 Bb1 (9...e5!?=) 10.Rb1+– c5 11.e4 Nf4 12.Bc4 Nb6? (better 12...e6!?+–) 13.Be5+– Qd7 14.Bf7! (14.Bf4?! Nc4 15.Qb3 Qg4+–) 14...Kf7 15.Bf4 e6?? (better 15...Qe6+–) 16.Ne5 (16.Ne5 Kg8 17.Nd7 Nd7 18.Qg4+–) 1–0. DEFFM – GuestXMTV, freechess.org, 2018.

5.Be2 h6 6.a4 e6= 7.b5 Qb6 (better 7...Ngf6!?=) 8.a5+– Qc5 (8...Qc7 9.a6 c5 10.ab7 Qb7 11.Nc3+=) 9.Nc3 cb5 10.Bb5 Ngf6 11.a6 ba6 (11...b6 12.Nd4+–) 12.Ra6+– Rb8 (12...Bg4 13.Qa1 Bf3 14.gf3+–) 13.Nd4 Qc7 (13...Bg6+–) 14.Qa1 Bc5? (14...Bg6+–) 15.Rc6 Qb7 16.Rc5 0–0 17.Rc6 1–0. Pierre – Tsons, internet, 2019.

5.Be2 h6 6.b5 Ngf6=.

5.Nh4 Be4 6.d3 e5 7.de4 Qh4 8.ed5 Bb4 9.c3 +=.

5.Nh4 Bg6 =.

5.Nh4 Nh6 6.Nf5 Nf5 7.Bd3 e6 8.a3 a5 9.Bf5 =.

5.c4 e6

6.a3 a5 7.cd5 (7.b5 c5 8.d4 (8.Nc3 Ngf6 9.d4 dc4 10.Bc4 Rc8 11.0–0=; 8.d3 Ngf6 9.Nbd2 Bd6 10.Be2 Bg4 11.h3=) 8...Ngf6 9.cd5 Nd5 10.Nbd2 N7f6 11.Be2=) 7...ed5 (7...cd5 8.Bb5 (8.ba5 Ngf6 9.Qb3 Be7 10.Nh4 Bb1 11.Rb1=) 8...Ngf6 9.Qa4 Bd6 10.Bf6 gf6 11.Nd4=) 8.b5 h6 (8...c5 9.Be2= (9.d3 Ngf6 10.Be2 Bd6 11.e4=) 9...Ngf6 10.0–0 Bd6 11.Nh4=) 9.Nd4 (9.Be2 c5= 10.0–0 Ngf6 11.Nc3=) 9...Bb1 (9...Bg6!?= 10.bc6 bc6 11.Nc3=) 10.bc6+/– (10.bc6 bc6 11.Rb1+/–) 10...bc6 11.Rb1+/– 1–0. pierred – kartal12, internet, 2008.

6.a3 dc4 7.Bc4 Ngf6 (7...Nb6 8.Be2 Nf6 9.0–0 Be7 10.d3 a5 11.ba5=) 8.0–0 Bd6 9.d3 0–0 10.Nd4 Bg6 11.f4 =.

6.a3 Ngf6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7).

6.a4 Bb4?? 7.Bg7+– f6 (7...Nc5 8.Bh8 dc4 9.Bc4+–) 8.Bh8 Qe7 (8...Ne7 9.Bg7+–) 9.Nd4 Bg6 10.a5 h5 (10...e5 11.Nc2+–) 11.a6 b6 (11...Rb8 12.ab7 Rb7 13.cd5 ed5 14.Qa4 Bb1 15.Be2+– (worse 15.Rb1 Bd2 16.Kd2 Rb1+–)) 12.Nc6 (12.Nc6 Qc5 13.Nb4 Qb4 14.cd5 ed5 15.Nc3+–) 1–0. GuestGWRV – GuestYQFV, freechess.org, 2018.

6.a4 Ngf6 7.b5 Bd6 8.bc6 bc6 9.Nd4 Bg6 10.Nc6 Qb6 11.Bf6 Nf6 12.cd5 Nd5 13.Nd4 0–0 14.Na3 a6 15.Nc4 Qc7 16.Nd6 Qd6 17.Be2 e5 18.Nf3 Nb4 19.0–0 Nd3 20.Nh4 Be4 21.f3 Bb7 22.Nf5 Qd7 23.Qb1 Rfd8 24.Bd3 Qd3 25.Ne7 Kh8 26.Qb7 Qd2 27.Rfe1 Rab8 28.Qc7 Re8 29.Rad1 Qb4 30.Nc6 1–0. Bonetti,Shane – Mishaja (2180), ICC, 2002.

6.a4 Ngf6 7.b5 Bd6 8.Be2 Qc7 9.d4 Bb1 10.Rb1 Bb4 (10...dc4 11.Bc4 Qa5 12.Ke2=) 11.Kf1= Ne4 (11...dc4 12.Bc4 0–0 13.Qb3=) 12.Qb3 Ba5 13.Bd3 Ndf6 14.Ba3 Ng4 15.Be4 de4 16.Ng5 Nf6 17.bc6 b6 18.d5 h6 19.Nh3 g5?? (better is 19...ed5 20.cd5 Rd8+/–) 20.Qb2+– 0–0–0 (20...e5 21.d6 Qc6 22.Qe5 Kf8 23.Qf6 Qc4 24.Kg1+–) 21.Qf6 ed5 (21...Rhe8 22.Qh6 ed5 23.Ng5 dc4+–) 22.cd5 Rhe8 (22...g4 23.Nf4 Kb8 24.Be7+–) 23.Rd1 (better is 23.d6 Qc6 24.Rc1 Qc1 25.Bc1 Re6+–) 23...Re5 (23...Kb8 24.Qh6 Bc3 25.Ke2+–) 24.d6 Bc3 (24...Re6 25.d7 Kb8 26.Qe6 fe6+–) 25.dc7 (better is 25.d7 Rd7 26.cd7 Kb7 27.d8Q+–) 25...Rd1= 26.Ke2 Rd2 ½–½. Riegler,Johannes – Galambfalvy,Monika, Vienna–ch, 2004.

6.b5 dc4 7.Bc4 cb5 8.Bb5 a6 9.Be2 Rc8 10.d3 Qb6 11.Qd2 =.

6.b5 dc4 7.Bc4+= Ngf6 (7...cb5 8.Bb5 Ngf6 9.Bf6 gf6 10.Nc3+=) 8.0–0 (8.Nc3 Bc5+=) 8...Be7 (8...Bd6 9.Nc3=) 9.bc6+= bc6 10.d3 (10.Nd4 Qb6 11.Qb3 Bg6 12.Qb6 Nb6+=) 10...0–0 (10...Rb8!? 11.Qc2 Nb6=) 11.Nbd2+= e5 (11...Rb8!? 12.Rb1 Qc7+=) 12.Be5+/– Ne5 13.Ne5 Qc7 14.f4 Rad8 (14...Rab8 15.Ndf3+/–) 15.Qf3+– Be6 (better is 15...Bb4!? 16.Nb3 c5+–) 16.Be6 (16.Nc6?! Bg4 17.Ne7 Qe7+–) 16...fe6 17.Qh3 Bc5 (17...Qc8+–) 18.Rac1 Bb6 (18...Qd6 19.d4 Bb4 20.Rc6+–) 19.Rc6 Qb7 (19...Qe7 20.Re6 Qb7 21.Ndc4+–) 20.Qe6 (20.Re6?! Nd5 21.Ndc4 Rf4 22.Rb6 Rf1 23.Kf1 ab6 24.Qe6 Kf8+–) 20...Kh8 21.d4 (21.Ndc4 Rfe8 22.Qh3 Kg8+–) 21...Rde8 (21...Nd5 22.Ne4 Bc7 23.Ng6 hg6 24.Qh3 (24.Qg6? Bf4 25.ef4 Nf4 26.Rf4 Qb1 27.Kf2 Rf4 28.Ke3 Rh4–+) 24...Kg8 25.Ng5+–) 22.Qc4 Qe7 23.Rf3 Nd7 24.Ng6! (24.Ng6 hg6 25.Rh3 Qh4 26.Rh4#) 1–0. Blittkowsky,Ralf (1780) – Molina,Vicente Andres, OP–2012–0–02005, 2012.

6.b5 Rc8 7.Nc3 (7.Nd4 Be4 8.Nc3 Ngf6 9.bc6 bc6 10.cd5 cd5 11.Ba6 =; 7.bc6 bc6 8.Nd4 Bg6 9.cd5 cd5 10.Bb5 Ne7 11.Nc3 =) 7...Ngf6 8.bc6 bc6 9.cd5 cd5 10.Nd4 Bg6 11.Ba6 +=.

6.b5 Ne7 7.Nc3 Nc5 8.d4 Ne4 9.Qb3 a6 10.bc6 bc6 11.Ne4 =.

6.b5 Ngf6!? =.

6.c5 a5 7.a3 ab4 8.ab4 Ra1 9.Ba1=.

6.c5 a5 7.a3 Ngf6 8.d4 Be7 9.Nc3 (9.b5 0–0=) 9...0–0 (9...ab4 10.ab4 Ra1 11.Qa1=) 10.Nh4 (10.b5 Ne4=) 10...Bg4+= 11.Nf3 Qc7 (11...b5 12.Be2=) 12.b5= e5 13.b6 Qd8 14.h3 (14.Be2 e4 15.Nd2 Be2 16.Qe2 Re8=) 14...Bf3 (14...Bf5 15.Be2= (worse is 15.de5 Ne4–/+)) 15.Qf3 (worse is 15.gf3 ed4 16.ed4 Re8–/+) 15...ed4 16.ed4 Nc5 (better is 16...Ne4!?=) 17.dc5+/– Bc5 18.0–0–0 (18.Na4!? Ne4 19.Nc5 Nc5 20.Be2+/–) 18...a4 19.Bd3 (19.Qf4 Qe7 20.Bd3 Ba3–/+) 19...Qb6 20.Qf5 (20.Nb1 Ne4 21.Be4 de4+/–) 20...Bd4 (20...Bf2!? 21.g4 Be3 22.Kb1 Bd4–/+) 21.Bc2 (21.Rd2 Rfe8=) 21...g6 (21...Bf2 22.Rd5 Rfe8 23.Rd6+=) 22.Qf4 Ne4?? (better is 22...c5=) 23.Rd4!+– Qd4 (23...f5+–) 24.Ne4 1–0. Sebald,Ralph – Zimmermann,Egon, Dortmund op–B, 1998.

6.c5 Qc7 7.Nc3 e5 (7...0–0–0 8.Qa4 Kb8 9.Nd4=) 8.d3 (8.d4 e4 9.Qc2 Ne7=) 8...Ngf6 (8...0–0–0 9.Qa4 Kb8 10.d4+=) 9.h3 (9.d4 e4 10.Qc2 Bg4=) 9...h6 (9...0–0–0 10.d4+=) 10.Be2 Be7 11.Qc2 (11.d4 e4 12.Nh4 Be6+=) 11...Be6 (11...b6 12.cb6 ab6 13.a3+=) 12.a4 (12.d4!?=) 12...a5–/+ 13.b5 Bc5 14.d4 Bb4 (14...ed4 15.bc6 dc3 16.cd7 Bd7 17.Bc3–+) 15.0–0 (15.Ne5 Ne5 16.de5 Qe5–/+) 15...e4–/+ 16.Ne5 (16.bc6!? Qc6 17.Bb5–/+) 16...Ne5 17.de5 Qe5 18.Na2 Qd6 19.bc6 bc6 20.Nb4 ab4 (20...Qb4 21.Qc6 Ke7 22.Ba3 Qa3 23.Qc7 Nd7 24.Ra3+–) 21.a5 0–0 (21...c5 22.Bb5 Ke7 23.a6–/+) 22.Rfc1 (22.Bf6 gf6 23.f3 f5–/+) 22...Rfc8 23.a6 (23.Bf6!? gf6 24.Qb2–/+) 23...c5–+ 24.a7 (24.Qd2 Ra7–+) 24...Qe7 25.Ra5 (25.Ba6 Rc7 26.Bd4 Nd7–+ (26...cd4?! 27.Qc7 Ra7 28.Qb8 Kh7 29.ed4+=; 26...Raa7?! 27.Bc5 b3 28.Be7 Rc2 29.Bf6 Ra6 30.Rcb1–+; 26...Rca7 27.Bc5 b3 28.Qb2+/–)) 25...Nd7 (25...Ra7 26.Bf6 gf6 27.Rc5 Rc5 28.Qc5 Qc5 29.Rc5–+) 26.Rca1 (26.f3 ef3 27.Bf3 Rc7–+) 26...f6 (26...c4 27.Rb5–+) 27.Bb5 (27.Ba6 Rc6 28.Bb7 b3+–) 27...Nb6 (27...c4!? 28.Bd4–+) 28.Ra6 Qd6 29.h4 (29.Rd1 Qc7 30.Bd4 b3 (30...cd4?! 31.Qc7 Rc7 32.Rb6–/+) 31.Qb3 cd4–+) 29...Rc7 30.h5 Bc8 31.R6a5 Qe7 32.Kh2 Bg4 33.Be2 Be2 34.Qe2 Rca7 35.Ra7 Ra7 36.Ra7 Qa7 37.Qg4 Qd7 38.Qg6 Qf7 39.Qf5 Qd7 40.Qg6 Qe6 41.g4 Nc4 42.Bf6 Qf6 43.Qe8 Kh7 44.Kg3 (44.Kg1 Qf3 45.Qg6 Kg8 46.Qe8 Qf8 47.Qe6 Qf7 48.Qc8 Kh7 49.Qc5 b3–+) 0–1. Amaraddio,A – Ivanovic,Andrej, Portoroz op, 1994.

6.c5 Ngf6 7.Nd4 =.

6.cd5 cd5 7.a3 Ngf6 8.Be2 a5 9.ba5 Qa5 10.0–0 Bd6 11.Nd4 =.

6.cd5 cd5 7.Be2 Ngf6 8.a3 a5 9.ba5 Qa5 10.0–0 Bd6 11.Nd4 =.

6.cd5 ed5 7.a3 Ngf6 =.

6.cd5 ed5 7.b5 c5 8.Nc3 Ngf6 9.Be2 Bd6 10.0–0 0–0 11.d3 =.

6.cd5 ed5 7.Nd4 Bg6 8.Be2 Bb4?? 9.Nc6!+– bc6 10.Bg7 Ngf6 (10...Be4 11.Bh8 Qg5 12.Bf3+–) 11.Bh8 Qa5 12.Qc1 (12.0–0 c5+–) 12...c5 13.Qb2 (better 13.Bf6 Nf6 14.0–0+–) 13...Ne4?? (13...Bb1 14.Bf6 Be4+–) 14.a3 Bd2 15.Nd2 Rb8 (15...f6 16.Bg7+–) 16.Qa2 (16.Qc1 f6 17.Bg7 Ne5+–) 16...Nc3 (16...f6 17.Qd5 Ke7 18.Bg7+–) 17.Bc3 Qc3 18.Rd1 Bc2 (18...Nf6 19.Qa1 Qa1 20.Ra1+–) 19.Rc1 Rb2 (19...Bb3 20.Qb1 Qg7 21.Bf3+–) 20.Qd5 Qd2 (20...Nb6 21.Qc6 Kf8 22.Qd6 Kg7 23.Qg3 Kf8 24.Qb8 Kg7 25.Qa7 h6+–) 21.Qd2 Ne5 22.Qc3 Rb1 23.Qe5 Kf8 24.Rb1 Bb1 25.0–0 Ba2 26.Rd1 Be6 (26...Bd5 27.Rd5 f6 28.Qf6 Ke8 29.Rd8) 27.Qh8 Ke7 28.Qd8 1–0. Janek – Alethe, internet, 2017.

6.cd5 ed5 7.Nd4 Bg6 8.Be2 Ngf6 9.a3 Bd6 (9...a5 10.b5 c5 11.Nf3=) 10.0–0 0–0 11.f4 Bb1 (11...h6 12.Nc3=) 12.Rb1+= Ne4 (better is 12...Re8!?+=) 13.Nf5+– f6 (better is 13...Be7 14.Bg7 Re8+–) 14.d3 (14.Nd6?! Nd6 15.Qc2 Nb6+=) 14...g6 15.Nd4 Qe7 16.de4 Qe4 17.Rf3 Rfe8 18.Rg3 Kg7 (18...Bc7+–) 19.Bd3 Qe7 (19...Bf4 20.Be4 Bg3 21.Qg4 Bh2 22.Kh2+–) 20.Nf5 (20.Nf5 Kh8 21.Ne7 Re7 22.Qg4+–) 1–0. pcmvr (2840) – birdmove (2190), net–chess.com, 2009.

6.cd5 ed5 7.Be2 A) 7...Bb4?? 8.Bg7 Bb1 9.Rb1+– (9.Bh8?! Bf5+–); B) 7...Ngf6=.

6.Be2 Bb4?? 7.Bg7 f6 8.Bh8 Qe7 9.cd5 cd5 10.a3 Ba5 (10...Bd6 11.Nd4 Nh6 12.Nf5 Nf5 13.Bh5 Kf8 14.e4 de4 15.Qg4+–) 11.Nd4 Bg6 12.Bg4 (12.Qa4 Bb6 13.Nc3 Kf7+–) 12...Bf7 (12...Nh6 13.Be6 (worse 13.Ne6 Kf7+–) 13...Nc5 14.Bd5+–) 13.Qa4 Bb6 14.0–0 Kf8 (14...Nh6 15.Be2 e5+–) 15.f4 (15.Nc3 Nh6 16.Nd5 ed5 17.Qd7 Qd7 18.Bd7 Ke7+–) 15...Nc5 (15...Nh6 16.Ne6! Be6+–) 16.Qc2 Ne4 17.Be6! Be6 18.Nc3 Rc8 19.Qd3 Bd4 (19...Nc3 20.dc3 Bd7 21.Rab1+–) 20.Qd4 (20.ed4 f5+–) 20...b6?! (20...Qc5 21.Rfe1 Qd4 22.ed4 Nd2 23.Re6 Rc3 24.Bf6 Kf7=+) 21.Ne4 de4 22.Qe4 Rc4 (22...Bc4 23.Qe7 Ne7 24.Bf6 Bf1 25.Kf1+–) 23.d4 Rc8 (23...Nh6 24.Rfc1 b5 25.Rc4 Bc4 26.Qa8 Kf7 27.e4+–) 24.Rf3 (24.d5 Bg4 25.Qd4 Re8+–) 24...Rd8 (24...Nh6 25.f5 Nf5 26.Qg4+–) 25.Rg3 Bd5 (25...f5 26.Qe5 Rd5 27.Qg7 Qg7 28.Rg7+–) 26.Qf5 (26.Qe7!? Ke7 27.Rg7 Ke6 28.Rh7 Be4+–) 26...Nh6 (26...Be4 27.Qh3 Qd6 28.f5+–) 27.Qh5 (27.Qh5 Nf7 28.Bg7 Ke8 29.Bf6 Qf6 30.Rg8 Ke7 31.Rd8 Nd8 32.Qd5+–) 1–0. GuestQTZV – FuManChuJr, freechess.org, 2017.

6.Be2 dc4 7.Bc4 A) 7...Bb4?? 8.Bg7 b5 9.Be2+– (9.Bh8?! bc4 10.Nc3 Bd3+–); B) 7...Ngf6+=.

6.Be2 Bd6?? 7.Bg7+– Ngf6 (7...dc4 8.Bh8 Bb4 9.Bc4+–) 8.Bh8 Be5 (8...dc4 9.Bc4 Bb4 10.0–0+–) 9.Ne5 Ne5 10.cd5 ed5 11.0–0 Ng6 (11...d4 12.d3+–) 12.Bg7 Qd6 13.b5 0–0–0 (13...Ne5 14.Nc3+–) 14.Qa4 (better is 14.bc6 bc6 15.Qa4 Rg8 16.Bf6 Qf6 17.Qa7 Qa1 18.Qa8 Kd7 19.Qg8 Ke7+–) 14...Ne4 (14...Rg8 15.Bf6 Qf6 16.Qa7+–) 15.f3 (better is 15.bc6 bc6 16.Rc1 Ne7+–) 15...cb5 (15...Nc5 16.Qa7 Bd3 17.Nc3 Be2 18.Ne2+–) 16.Qa7 Nc5 (16...Qa6 17.Qa6 ba6 18.fe4+–) 17.Rc1 Rg8 (17...b6 18.d4 Rd7 19.Qa8 Qb8 20.Qa6 Kd8 21.dc5+–) 18.Rc5 (18.Rc5 Kd7 19.Qb7 Ke6 20.Rc6 Rg7 21.Nc3+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

6.Be2 h6 7.0–0 Bb4 (7...dc4 8.Bc4 Ngf6 9.a3=) 8.cd5 ed5 (8...cd5 9.Bg7 Rh7 10.Bb2+=) 9.Bg7+= Rh7 10.Bd4 c5 (10...Bd6 11.Qb3 Qb8 12.Nh4 Bh2 13.Kh1=) 11.Bb2 Ne7 (11...Ngf6 12.Nc3+=) 12.Nh4+/– Qc7?? (better is 12...Be4+/–) 13.Nf5+– Nf5 14.Qc2 (14.Bd3 Rg7 15.a3 Ba5 16.Bf5 Rg5+–) 14...0–0–0 (14...Rg7 15.Qf5 Rg5+–) 15.Qf5 (15...Rdh8 16.Bh8 Rh8 17.a3+–) 1–0. Fritz 10 – NN, 2006.

6.Be2 h6 7.b5 Qc7 8.bc6 bc6 9.cd5 ed5 10.Nc3 Rb8 11.Na4 c5 12.Rc1 Ngf6 13.0–0 Rc8 (13...Bd6!?=) 14.Bf6 Nf6 15.Nc5 Bc5 16.d4 Qb6 17.dc5 Rc5 18.Rc5 Qc5 19.Qd4 Qd4 20.Nd4 (20.ed4?! Ke7=) 20...Bd7 21.Rb1 0–0 22.Rb7 Ra8 23.f3 Kf8 24.Kf2 Bc8 25.Rc7 Ne8 26.Rc5 Nf6 27.Bd3 Bb7 (27...Bd7 28.Rc7+–) 28.Nb5 Ne8 29.a3 Ke7 30.Nd4 g6 31.Kg3 Nd6 32.a4 Rc8 33.Rc8 Nc8 34.a5 a6 35.Nb3 Na7 ½–½. marekt (2190) – grasul2009 (2430), gameknot.com, 2014.

6.Be2 h6 7.b5 Qc7 8.bc6 Qc6 9.cd5 Qd5 10.Nc3+/–.

6.Be2 h6 7.b5 Ngf6 8.Nd4+=.

6.Be2 h6 7.cd5 cd5 8.a3 Ngf6 =.

6.Be2 h6 7.cd5 cd5 8.Nd4 Bg6+=.

5.c4 Ngf6

6.a3 e6 7.cd5 ed5 8.Be2 Bd6 9.Nd4=.

6.a4 e6 7.c5 b6 8.Nd4=+ bc5 9.Nf5 ef5 10.bc5 Bc5 11.Qc2 g6 12.Qc3 Rb8=+ 13.Be2 Qb6 14.Ra2 0–0 15.0–0 Bb4 16.Qc2=+ c5 17.Nc3 Rfc8 18.Bf3 Qe6 Black fights for the Initiative 19.Raa1 Ne5 20.Be2 Ne4 Black prepares the advance c4 21.d3 Nc3 22.Bc3 d4 23.Bd2 c4 24.Qa2? cd3 25.Qe6 fe6 (26.Bb4 de2–+) 0–1. Muri,Emil – Tatai,Stefano (2410), Chiasso op, 1991.

6.c5 Qc7 7.d4 b5 (7...e6 8.Nc3=) 8.a4+= Qb7 (8...ba4!? 9.Nc3 e6+=) 9.ab5+/– cb5 10.Nc3 a6 11.Ne5 Nb8? (better is 11...Rc8+/–) 12.Qb3+– e6 13.Qa2 Nfd7 (13...Ke7 14.Bb5! Ne8 15.Be8 Ke8 16.Qa4 Kd8 17.Qa5 Ke7 18.Nb5+–) 14.Bb5! Qc7 (14...ab5 15.Qa8 Pinning (15.Qa8 Deflection)) 15.Nd7 (15.Nd5 ed5 16.Qd5 ab5 17.Qf7 Kd8 18.Ra8 Ne5 19.Qf5 Nc4+–) 15...Nd7 16.Ba6 Be7 17.Qa5 Qb8 18.Qb5 Qc7 19.Qb7 (19.Qb7 Qb7 20.Bb7 Ra1 21.Ba1+–) 1–0. Shorokhov,M (2135) – Kutliev,R (1745), 14th FIDE Open, Voronezh RUS, 2010.

6.c5 e6 =.

6.cd5 cd5 7.Bb5 a6 8.Ba4 b5 9.Bb3 Nb6 10.0–0 e6 11.Nc3 Be7 12.h3 Nc4 13.Bc4 dc4 14.Ne2 Bd3 15.Ne5 Be2 16.Qe2 0–0 17.Rfd1 Qc7 18.Rac1 Nd5 19.a3=+ Bf6 20.f4 Rfd8 21.Qf3 Rac8 22.e4= Nb6 23.d3 Na4 24.Ba1 c3 25.Ng4? Bd4–+ 26.Kh1 Qb7 27.Rc2 f5 28.Ne3? fe4–+ 29.de4 Qb6?? 30.Ng4 Rf8 31.g3 Rcd8 32.Kg2 Qb7 33.Qe2 White prepares e5 33...g6 34.Rdc1 Rc8 35.Kh2 Kg7 36.e5 Rcd8 37.h4 Qb6 38.Kh3 Qc6 39.Nf6= Qb6 40.Rd1 Rc8?? 41.Nd7+– Qa7 42.Nf8 Rf8? 43.Qe4 Rd8 44.Bc3! Nc3 45.Rc3! Bc3 46.Rd8 Qb6 47.Qd3 Be1 48.g4 Qg1 49.Qd7 Kh6 50.g5 (50...Qg5 51.hg5 Kh5 52.Qh7#) 1–0. coloplayah (2140) – sgalahad (2015), net–chess.com, 2006.

6.cd5 Nd5 7.Qb3 e6 8.a3 N7f6 (8...a5 9.b5+=) 9.Nc3 Be7 10.Be2 0–0 11.0–0 Re8 12.Rac1 Rc8 13.Qa4 a6 14.Rfd1 Bd6 15.d3 e5 16.e4 Nc3 17.Bc3 Bg4 18.Qb3 Qe7 19.Qb2 Bf3 20.Bf3 h6 21.g3 Rcd8 22.a4 (22.d4 ed4 23.Rd4 Rb8=) 22...a5+= 23.Rb1 (worse is 23.ba5 Ba3 24.Qc2 Bc1 25.Qc1 Rd7–/+) 23...ab4 24.Bb4 Bb4 25.Qb4 Qb4 26.Rb4 Re7 27.Be2 Ra8 28.f4 Ra7 29.Rc1 ef4 30.gf4 Rd7 31.Kf2 Kf8 32.Ke3 Re7 33.Kd2 Rd7 34.Kc3 Ke7 35.Bf3 Ke8 36.h3 Kf8 37.Bd1 Ke7 38.Rd4 Rc7 39.Kd2 Ra8 40.Rb4 Ra7 41.Ke3 Rd7 42.Rb6 Kf8 43.Ra1 Re7 44.Kd2 Rd7 45.Kc3 Ke7 46.a5 Kf8 47.Bb3 Nh5= 48.f5 Nf4 49.Bc4 Ne2 50.Kd2 Nd4 51.Ra2 Nf3 52.Kc3 Ne5 53.d4+/– Nf3 54.a6 Ng5 55.Bd3 Nh3+= 56.ab7 Rdb7 57.Ra7 Rb6 58.Kc4 Nf4 59.Kc5+/– Rb8? 60.Bc4+– Kg8 61.Bf7 (61.Bf7 Kh7 62.e5+–) 1–0. Saradjen,Janko (2155) – Leban,Matej (1970), SLO–chT, 2006.

6.Be2 e6 7.cd5 ed5 8.Nd4 (8.a3 Bd6=) 8...Bb1 (8...Be4 9.b5 Bg2 10.Rg1 Be4 11.d3 Bg6 12.bc6 bc6 13.Nc6 Qc7 14.Bf6–/+; 8...Bg6 9.f4 (9.a3 a5 10.b5 c5 11.Nf3 Bd6 12.Nh4 Qe7 13.Ng6 fg6 14.0–0=; 9.Qb3 a5 10.b5 c5 11.Nf3 c4 12.Qd1 Qb6 13.Nc3 Bb4 14.Nh4+=; 9.b5 c5 10.Nf3 Bd6 11.Nh4 a6 12.ba6 ba6 13.f4 Rb8 14.Ng6=) 9...Bb1 10.Rb1 Ne4 11.Nf3 Bb4 12.Bg7 Rg8 13.Rb4 Rg7 14.0–0=) 9.Rb1 Bb4 10.Nf5 Bf8 11.0–0 (11.g4 Rb8 12.Qa4 a6 13.Qf4 h6 14.Be5=) 11...g6 12.Ng3 Qc7 (12...Rb8 13.e4 de4 14.Ne4+=) 13.Qb3 Rb8 (13...h5 14.Rfc1=) 14.Bg4 (14.e4 Rg8=) 14...Bg7 (14...Nc5!? 15.Qc2 Qe7=) 15.Bd7= Qd7 16.Be5 0–0 17.Bb8 Rb8 18.Rfc1 h5 19.Qa4 Ra8 20.d3 Ng4 21.h3 Ne5 (21...Nf6!?+/–) 22.Qb3+– Rb8 (22...d4 23.f4 de3 24.fe5 Be5 25.Ne2+–) 23.f4 Nf3 24.gf3 Qh3 25.Nf1 Qf3 26.Rc2 (26.Rc6 Qg4 27.Kf2 d4+–) 26...h4 (26...Qg4!? 27.Rg2 Qe6+–) 27.Qa3 d4 (27...a6 28.Qd6 Qg4 29.Kf2+–) 28.Qa7 Rf8 (28...Re8 29.Rf2 (29.ed4? Qd3 30.Rd2 Qb1–+) 29...Qh3 30.Rh2 Qg4 31.Rg2+–) 29.Rb7 de3 30.Qe3 (worse is 30.Ne3 c5 31.Qc5 Qb7+=) 30...Qd5 31.Qe4 Qh5 32.Rc6 h3 33.Kh2 Qg4 34.Ne3 Qh4 35.Qf3 Bh6 36.Ng4 Ra8 37.Rg6! Bg7 38.Qd5 1–0. pcmvr (2730) – iozeph (2510), net–chess.com, 2007.

6.Nh4 Bg4 7.f3 Be6 8.cd5 cd5 9.g4=.

5.Be2 Qc7

6.b5 c5 (6...e5 7.0–0=) 7.c4 e6 8.cd5 ed5 9.Nc3 Ngf6 10.a4 b6 11.d3 Bd6 12.e4 de4 (12...Be6 13.ed5 Nd5 14.Ng5=) 13.de4+= Ne4? (13...Be6 14.Ng5+=) 14.Nd5?? (better 14.Qd5 0–0 15.Qf5 Nc3 16.Ng5+–) 14...Qb8 15.0–0 (15.Ne3 Be6 16.Bg7 Rg8=) 15...0–0=+ 16.h3 (16.Re1 Re8=+) 16...Kh8 (16...Re8 17.Re1–/+) 17.Nh4 (17.Re1!?=+) 17...Be6–/+ 18.Bf3 Ng5 19.Re1 Nf3 (19...Nf3 20.Nf3 Qb7=+) 0–1. GuestKDQB – GuestYKJK, freechess.org, 2018.

6.Nh4 Bg6=.

6.0–0 e5

7.a3!?=.

7.b5 Bd6 8.Nh4 Be6 9.f4 f6 10.Bg4 (10.bc6 bc6 11.fe5 fe5=+) 10...Bg4 11.Qg4 g6 (11...cb5?? 12.Qg7 0–0–0 13.Qh8 ef4 14.Nf5 fe3 15.Qh7+– (worse 15.Nd6 Qd6 16.Qh7 e2+–)) 12.bc6 bc6 13.Nc3 (13.Qe6 Kd8=) 13...0–0–0 (better 13...ef4!? 14.Nf5 Rb8 15.Nd6 Qd6–/+) 14.fe5+= Be5 (14...fe5 15.Rab1+=) 15.Nf3+– Nh6 16.Qh3 Nf5 17.Rab1 Kb7?? (better 17...Qa5+=) 18.Nd5!+– Bh2 (18...cd5 19.Be5 A double attack) 19.Nh2 cd5 20.Be5 (20.Be5 Qb6 21.Bc3+–) 1–0. Grandie – Guestfree, internet, 2021.

7.b5 e4 8.Nd4= Bg6 9.f4 c5 10.Nb3 f5 11.g4 (11.a4!?+=) 11...Ne7 (11...fg4 12.Bg4 Ngf6 13.Nc3=+) 12.gf5 (12.a4 0–0–0=+) 12...Nf5=+ 13.c4 Nb6 (13...d4 14.ed4 cd4 15.Qe1–/+) 14.cd5= Nd5 15.Qc1 (15.Nc3 Nc3 16.Bc3=) 15...b6 (15...Qe7!?=) 16.Qc4+= Bf7 (16...0–0–0!?+=) 17.Qe4+– Nfe7 18.Bg4 (better 18.Bc4+–) 18...g6?? (better 18...Qd8+–) 19.Bh8+– h6 (19...Qd8 20.Nc3+–) 20.Be5 (20.Na3 Qd8+–) 20...Qd8 21.Nc3 Nc3 (21...a6 22.ba6 Ra6 23.Nb5+–) 22.dc3 Qd5 (22...c4 23.Nd4 Qd5 24.Qc2+–) 23.Qc2 Nf5 (23...c4 24.Bf3 cb3 25.Bd5 bc2 26.Ba8+–) 24.Bf3 Qd8 (24...Qe6 25.Ba8 Ne3 26.Qe2 Nf1 27.Bc6 Ke7 28.Rd1+–) 25.Bc6 Ke7 26.Qe4 Qd4 27.Nd4 cd4 28.Bf6! Kf6 (28...Kf6 29.Qe5) 29.Qe5 1–0. DEFFM – GuestHQGZ, freechess.org, 2018.

7.c4 Bb4 8.cd5 cd5 (8...Ngf6!? 9.dc6 bc6+=) 9.Qb3+– Qa5 10.Ne5 Ne5 (better 10...Ngf6!? 11.Nd7 Bd7 12.Bf6 gf6+–) 11.Be5+– f6 12.Bd6! Bd6 13.Qb7 Rd8?? (better 13...Ne7 14.Qa8 Bc8+–) 14.Qg7 Qc7 (14...Rb8 15.Nc3 Be5 16.Bh5 Kd8 17.Qh8+–) 15.Bh5 (15.Qh8?! Kf7 16.Nc3 Bh2 17.Kh1 Nh6 18.Bh5 Ke6 19.Qd8 Qd8 20.Kh2 Bg4 21.Bg4 Ng4 22.Kg1 d4+–) 15...Bg6 16.Bg6 hg6 17.Qh8 Kf8 18.Nc3 Be5 (18...Rd7 A) 19.Nd5?! Rh7 20.Nc7 Bh2 (20...Rh8?? 21.Ne6 Kf7 22.Nf4+–) 21.Kh1 Rh8 22.Ne6 Ke7+–; B) 19.Rab1 Be5 20.d4+–) 19.d4 Bd6 (19...Qc3 20.Rfc1 Bh2 21.Qh2+–) 20.Rfc1 Qf7 21.Nb5 Bb8 22.Rab1 Ke7 (22...a6 23.Nc3 Bd6+–) 23.Na7! Ba7 (23...Kf8 24.Nc6 Re8 25.Rb8 Rb8 26.Nb8 Qb7+–) 24.Rc7 Rd7 25.Rd7 (25.Rd7 Kd7 26.Rb7 Ke6 27.Rf7 Kf7 28.Qh7 Kf8 29.Qa7+–) 1–0. JeChristi – Nunez, internet, 2019.

7.d3 Bb4–/+ 8.e4 (8.Nbd2 Ngf6–/+) 8...de4 9.de4 Bg4 (9...Be4 10.Ne5 Ne5 11.Qd4 Bc2 12.Qb4–/+) 10.a3 (10.Ng5 Be2 11.Qe2 Bc5–/+) 10...Ba5 (10...Bc5 11.Nbd2–/+) 11.Nc3 (11.Nh4 Be2 12.Qe2 Ngf6–/+) 11...Ngf6 12.h3 (12.Ng5 Be2 13.Qe2 b5–/+) 12...Bh5 (12...Bc3 13.Bc3 Ne4 14.Be5 Ne5 15.hg4 Ng4 16.Bd3–+) 13.Nd2 (13.Nh4 Bg6–/+) 13...Bg6 14.Bf3 b5 15.Re1 Nc5 16.Nb3–/+ Bb6 17.a4 Nb3 18.cb3–/+ b4 19.Ne2 0–0 20.Qc2 Rac8 21.Rac1 a5 22.Red1 Rfe8 23.Ng3=+ Qa7 24.Rd6 h6 25.Rcd1 Bc5 26.R6d2 Bb6 27.Rd6 Bc5 28.R6d2= Bb6 (28...Rc7 29.Rd8 Rce7 30.R8d2=+) ½–½. Whiterose – RageofKlugman, ChessWorld.net, 2006.

5.Be2 e6

6.a3 h6 7.0–0 Qc7 8.c4 Ngf6 9.Nc3 Bd6 10.Rc1 a6 11.d3 0–0 12.Qb3 Rac8 13.a4 (13.c5!? Be7 14.Nd4+=) 13...Qb6 14.b5 Nc5 15.Qc2 (better is 15.Qd1!? dc4 16.dc4+=) 15...dc4–/+ 16.e4 cd3 (16...Nd3?! 17.a5 Qd8 18.ef5 Nc1 19.Rc1 cb5 20.fe6 fe6 21.Ne4–/+) 17.Bd3 Bg6 18.ba6 ba6 (worse is 18...Na6 19.Rfd1 Nb4 20.Qe2–/+) 19.Rb1 Qc7 20.Rfe1 Nd3 21.Qd3 Ra8 22.Qe2 Bb4 23.Nd2 Rfd8 24.f3 Qd6 25.Red1?? (better is 25.Nb3–/+) 25...Bc3–+ 26.Bc3 Qc5 (26...Qc5 27.Kh1 Qc3–+) 0–1. vhilts (2505) – iozeph (2540), net–chess.com, 2013.

6.a3 h6 7.0–0 Ngf6 8.c4 Bd6 (8...dc4 9.Bc4 Nb6 10.Be2=) 9.d4 (9.d3 e5=) 9...0–0 (9...dc4 10.Bc4 0–0 11.Nc3=) 10.Nc3 (10.c5 Bc7=) 10...Ne4 (10...dc4 11.Bc4 b5 12.Bd3 Bd3 13.Qd3=) 11.Ne4 (11.c5 Bc7=) 11...Be4 12.c5 Bc7 13.Qb3 Nf6 14.Ne5 Nd7 15.Nf3 (15.Nd7 Qd7 16.f3 Bg6=) 15...Qf6 16.Rac1 (16.b5 Rfb8=) 16...Bf3 (16...Qg6 17.Bc3=) 17.Bf3 Qh4 18.g3 Qh3 (18...Qf6 19.e4=) 19.b5+= Nf6 (19...Rfb8 20.bc6 bc6 21.Qa4+=) 20.Bg2 (20.bc6 bc6 21.Bg2 Qh5+=) 20...Qh5 21.bc6 bc6 22.Qa4 Ng4 (22...Rfc8!?+=) 23.h3+– Nf6 24.Qc6 Rac8 (24...Rfc8 25.Qa4+–) 25.Qa6 Ne4 (25...Bb8 26.Rfe1+–) 26.Qa7+– Qg6 (26...Ng5 27.Kh2+–) 27.Bc3 Ng3 (27...Qh5 28.Qb7+–) 28.fg3 Qg3 29.Rf3 Qg6? (better 29...Qh2 30.Kf2 Ra8 31.Qa8 Ra8+–) 30.Bb4 (30.a4 Rfd8+–) 30...Qd3 (30...e5 31.de5 Qc6 32.Ba5+–) 31.c6 (31.Rcf1 Bb8 32.Qe7 Rc7+–) 31...Rfe8 32.Qb7 f6 (32...Qg6 33.Rcf1 f6 34.Bc5+–) 33.a4 (better 33.Kh1 Kh8+–) 33...e5 (33...Qg6 34.Bc5+–) 34.Qb5 e4 (34...Qg6 35.Qd5 Kh7+–) 35.Qd5 Kh8 36.Bf1 ef3 (36...Red8 37.Qf7 Qd4 38.ed4 ef3+–) 37.Bd3 Re3 38.Qf5 Rd3 39.Qc8 Kh7 40.Qc7 (40.Qc7 Rd1 41.Rd1 Kg6 42.Kf2 h5 43.Rg1 Kf5 44.Kf3 g5 45.Qh7 Ke6 46.Qd7) 1–0. Kamilsson – Pointer, internet, 2020.

6.c3 Ngf6=+ 7.0–0 Bg4 (7...Bd6 8.Nd4=+) 8.Nd4 (8.h3 Bh5=) 8...Be2=+ 9.Qe2 Be7 (9...e5 10.Nc2=+) 10.d3 0–0 11.Nd2 c5 (11...e5 12.Nf5=+) 12.bc5 Bc5 13.N4b3 Bb6 14.d4 a6 (14...Qe7 15.c4=) 15.a4 Rc8 16.a5 Ba7 17.Rfc1 Nb8 18.Ba3 Re8 19.Bc5 b6 (19...Bc5!? 20.Nc5 Rc7+=) 20.ab6+– Bb6 21.Bb6 Qb6 22.Nc5 a5 23.c4 (23.Rcb1 Qd6 24.Ra5 Nc6+–) 23...Nc6 24.cd5 (24.Rab1 Qc7+=) 24...Nd5 (24...ed5!? 25.Qd3 g6+=) 25.Nc4+– Qc7 26.Na6 (26.Ne4 Red8+–) 26...Qd8 27.Qf3 (27.h3 e5 28.de5 Ne5 29.Ne5 Rc1 30.Rc1 Re5+=) 27...Ra8 (27...e5 28.Nc5 Rb8 29.de5 Ne5 30.Qe2+=) 28.Nc5+– Qc7 29.Ne4 Reb8 30.g3 a4 31.Ncd6 (31.Qd1 Qa7+–) 31...h6 (31...f5 32.Nf5 ef5 33.Qf5=) 32.Qf7 (better 32.Qe2!?+=) 32...Qf7=+ 33.Nf7 Ncb4 (better 33...Kf7!? 34.Rc6 a3=+) 34.Ne5+= a3 35.Nc5 a2 (35...Nc7 36.Kf1+–) 36.Ne6+– Nc2 (better 36...Rc8 37.Nc5 Ra3+–) 37.Nc6?? (better 37.Rc2 Rb1 38.Rc1 Rc1 39.Rc1+–) 37...Na1–+ 38.Nb8 Nc2 (better 38...Nb3 39.Re1 Rb8–+) 39.Nc6 a1Q 40.Ra1 Ra1 (40...Na1?! 41.e4 Nc3 42.f3–+) 41.Kg2 Ra6 42.Ncd8 Ncb4 43.e4 Ne7 (43...Nc3!? 44.f3–+) 44.h4 Rd6 (better 44...Ra2!?–+) 45.d5–/+ Ned5 (45...Ng6 46.f4–/+) 46.ed5 Nd5 47.Kf3 Nc7 48.Nc7 Rd8 49.Kg4 Rd4 50.f4 (50.Kf3 Rd7 51.Ne6 Rf7 52.Kg2 Rf6–/+) 50...Kf7–+ 51.h5 Rd7 (51...Ke7 52.Kf5–+) 52.Na6–/+ Kf6 53.Nc5 Rd4 54.Nb3 Rb4 55.Nd2 g6 (55...Ke6 56.Nf3–/+) 56.hg6 Kg6 57.Nf3 (57.Kf3 h5–/+) 57...h5=+ 58.Kh3 (58.Kh4 Rb3 59.Ne5 Kf5–/+) 58...Rb1 (58...Rb3 59.Ne5 Kf5 60.Kg2–/+) 59.Nh4 (59.g4 Rb3 60.Kg3 h4 61.Kg2 h3 62.Kf2 Kf6–/+) 59...Kf6 60.g4?? (better 60.Kg2–/+) 60...Rb3–+ 61.Kg2 hg4 62.Kg1 (62.Kf2 Ra3 63.Ke1 Ra2–+) 62...Rh3 63.Ng2 Kf5 64.Kf1 Ke4 65.Kg1 (65.Kf2 g3 66.Kg1–+) 65...Kf3 66.f5 (66.Ne1 Ke2 67.Ng2 Rg3 68.f5 Kf3 69.Kf1 Rg2 70.f6 Rf2 71.Ke1 g3 72.f7 Ke3 73.f8Q Rf8 74.Kd1 Rc8 75.Ke1 Rc1) 66...Rh5 (66...Rg3 67.f6 Rg2 68.Kf1 Rf2 69.Ke1 g3 70.f7 Ke3 71.f8Q Rf8 72.Kd1 Rc8 73.Ke1 Rc1) 67.f6–+ Rf5 (67...Rh6 68.f7 Rf6–+) 68.Nh4+– Ke4 69.Nf5 Kf5 70.f7 1–0. Kleine,Peter – Gonzalez Santamaria,Pablo, Trofeo Cabildo de Gran Canaria, 2017.

6.d3 h6 7.a3 Ngf6 8.0–0 Be7 9.c4 A) 9...0–0 10.c5 (10.Nbd2 a5 11.Qb3 Qc7 12.Qc3 Rfd8 13.cd5 ab4+=; 10.Nc3 a5 11.c5 e5 12.e4 Bg4 13.ed5 cd5=; 10.Qb3 dc4 11.dc4 c5 12.Nc3 Qb6 13.b5 Rfd8=) 10...Bg4 11.Qc2 b6 12.Nd4 Be2 13.Nc6 Qe8+=; B) 9...a5 10.c5 (10.cd5 cd5 11.b5 0–0 12.Nc3 Rc8 13.Nd4 Bg6=; 10.b5 dc4 11.dc4 cb5 12.cb5 0–0 13.Nd4 Bg6=; 10.Qe1 0–0 11.Nd4 Bg6 12.c5 ab4 13.ab4 Ra1=) 10...ab4 11.ab4 Ra1 12.Ba1 0–0 13.Qd2 Qc7=; C) 9...dc4 10.dc4 Qc7 11.Nd4 Bg6 12.Nd2 0–0 13.Qb3 e5=.

6.d3 h6 7.a3 Ngf6 8.0–0 Be7 9.Nbd2 Qc7 (9...0–0 10.c4= (10.Nb3 Bd6 11.Nfd4 Bg6 12.f4 Qe7 13.Nf3 e5=; 10.Nd4 Bg6 11.N4b3 e5 12.Nf3 Qc7 13.Qd2 Bf5=; 10.Nh4 Bh7 11.Nb3 Qc7 12.Nf3 e5 13.Qe1 Bf5=) 10...a5 11.Qb3 Qc7 12.Qc3 Rfd8 13.cd5 ab4+=; 9...a5 10.Bc3 (10.e4 de4 11.de4 Ne4 12.Ne4 Be4 13.Bg7 Rh7+=; 10.ba5 Qa5 11.Nd4 Bg6 12.c4 0–0 13.cd5 ed5=; 10.b5 cb5 11.Nd4 0–0 12.N2f3 b4 13.Nf5 ef5=) 10...ab4 11.ab4 Ra1 12.Qa1 0–0 13.e4 de4=; 9...c5 10.Qb1 (10.Rb1 cb4 11.ab4 0–0 12.c4 dc4 13.Nc4 Rc8=; 10.Nh4 Bh7 11.b5 Qb6 12.Rb1 0–0 13.Nhf3 Bd6=; 10.bc5 Nc5 11.Rb1 0–0 12.Bf6 Bf6 13.d4 Ne4=) 10...0–0 11.bc5 Nc5 12.Bf6 Bf6 13.d4 Ne4=) 10.c4+= (10.e4 de4 11.de4 Ne4 12.Bg7 Rg8 13.Bd4 c5=; 10.Nd4 Bg6 11.f4 a5 12.ba5 Ra5 13.c4 e5=; 10.Nb3 e5 11.Qe1 0–0–0 12.Rd1 Rhe8 13.Qc3 Bd6+=) 10...0–0–0 (10...0–0 11.Rc1+= a5 12.b5 Nc5 13.Bf6 Bf6+=) 11.cd5+/– ed5 12.Nd4 Bg6 13.Rc1 Kb8 (13...Rhe8+=) 14.N2f3 Bd6? (better is 14...Rhe8+/–) 15.Nb5!+– Bh2 (15...cb5 16.Rc7 Pinning (16.Rc7 Deflection)) 16.Nh2 Qb6 17.Nd4 h5 18.Nhf3 Ng4 (18...h4 19.Ng5+–) 19.Qa4 Rc8 (19...Ndf6 20.Nb3 a6 21.Bd4+–) 20.Nb3 Ne3 (20...Qc7 21.Bg7 Nb6 22.Qa5+–) 21.Ne5 Ne5 (21...Qc7 22.Nd7 (22.fe3?! Ne5 23.Nc5 Ka8+–) 22...Qd7 23.Be5 Ka8 24.fe3+–) 22.Be5 (22.fe3?! Qe3 23.Rf2 a6+=) 22...Ka8 23.Bd4 (23.fe3?! Qe3 24.Rf2 Qe5+=; 23.Bg7?! Nf1 24.Bd4 c5 25.Bh8 Ng3 26.fg3 Qe6+–) 23...Qa6 (23...Qd4 24.Nd4 (24.fe3 Qe3 25.Rf2 h4+=) 24...Nf1 25.Bf1+–) 24.Qa6 ba6 25.fe3 h4 (25...f6 26.Na5+–) 26.Bg7 Rhg8 27.Bd4 h3 28.g3 f5 29.Kh2 Rce8 (29...Rc7 30.Kh3 Rd8 31.Na5+–) 30.Rc6 f4 (30...Rc8 31.Rfc1 Rc6 32.Rc6+–) 31.Rf4 Re7 32.Rg4 Bh7 33.Rg8 Bg8 34.Rc8 Kb7 35.Rg8 Rc7 36.Na5 1–0. Janek – Vesely, internet, 2016.

6.h3 Ngf6 7.a3 a5 8.c3 (8.b5 Bd6=) 8...ab4 9.ab4?? (better 9.cb4 Bd6 10.Nh4=+) 9...Ra1–+ 10.Ba1 b5?? (better 10...Qa8 11.Nd4 Qa1 12.Nf5 ef5–+) 11.d4 (11.Nd4!? Bb1 12.Qb1=) 11...Ne4 12.Nbd2 Be7 13.Ne4 Be4 14.Nd2 (better 14.0–0=+) 14...f5?? (14...Bg2 15.Rh2 Be4 16.Ne4 de4 17.Rg2–/+) 15.f3?? (better 15.0–0+=) 15...Bh4–/+ 16.Kf1 (better 16.g3 Bg3 17.Kf1–/+) 16...0–0?? (16...Qg5 17.Rh2 Qg3 18.Kg1 Qf2 19.Kh1–+) 17.Ne4?? (better 17.Kg1+=) 17...fe4–/+ 18.f4 g5 19.Bg4 Qf6 20.Kg1? (better 20.Ke2 gf4 21.ef4 Qf4 22.Rf1–+) 20...gf4 21.ef4 (21.Qe2 fe3 22.g3 Bg3–+) 21...Nb6 (21...Qf4 22.Bf3 Bg3–+) 22.Qf1 Nc4 23.Kh2 (23.Qc1 Bg3 24.Be2–+) 23...Ne3 24.Qe2 (24.g3 Nf1 25.Rf1–+) 24...Nc4 (24...Qf4 25.Kg1 Bf2 26.Qf2 Qf2 27.Kh2 Qg2) 25.Rf1 (25.Qf1 Nd2 26.g3 Nf1 27.Rf1 Bg5–+) 25...Kh8 (better 25...Qg6=+) 26.Qc2?? (26.g3!? Bg5 27.Bb2=) 26...Rg8?? (26...Ne3 27.Qe2 Nf1 28.Qf1 Qf4 29.Qf4 Rf4 30.Bb2–+) 27.Qa2? (27.Qe2 e3 28.g3 h5 29.Bh5 Bg3 30.Kg2 Nd2–+) 27...Qg6?? (better 27...Ne3 28.Qe2 Nf1 29.Qf1 e3–+) 28.Qa6?? (better 28.Qe2=+) 28...h5 29.f5 (29.Qc6 Ne3 30.Qb5 hg4–+) 29...Qg5 30.Qc6 (30.Kh1 hg4 31.g3 gh3 32.Qc8 Rc8 33.Rf4 Bg3 34.Kg1 Bh4 35.Rg4 Qg4 36.Kh2 Qg2) 30...hg4 31.Qe6 gh3 32.g4 (32.Qe5 Ne5 33.g4 Qg4 34.Rf2 Qg3 35.Kh1 Qg1) 32...Qg4 (32...Qd2 33.Kh3 Qe3 34.Kh4 Qg5 35.Kg3 Qg4 36.Kf2 Qg2 37.Ke1 Qd2) 33.Qh6 1–0. alessandrocarvalhaes (1900) – Wisdom200 (1920), lichess.org, 2019.

4.Nf3 e6

5.a3 Qb6 6.c4 Bb1 (6...Nf6 7.Bf6 gf6 8.cd5 cd5 9.Nd4=) 7.Rb1 dc4 8.Bc4 c5 (8...Qd8 9.0–0+/–) 9.bc5 Qc5 10.Qb3 b6?? (10...Nd7 11.Qb7 Rb8 12.Qa6+–) 11.0–0 (11.Be6 fe6 12.Qe6 Ne7+–) 11...Nc6?? (11...Nd7 12.Rfc1 Qd6 13.Bb5+–) 12.Bb5 (12.Rfc1 Na5 13.Qa4 Kd8 14.Be6 Qe7 15.Qd4 Qd6+–) 12...Rc8?? (better is 12...a6 13.Bd3 b5+/–) 13.Rfc1+– Qd5 (13...Qd6 14.Bc6 Rc6 15.Qa4+–) 14.Qd5 ed5 15.Bc6 Kd8 16.Bd5 Bc5 17.Bg7 Ne7 18.Bh8 Nd5 19.d4 Be7 20.Rc8 Kc8 21.a4 Kb7 22.Ne5 Nc3 23.Ra1 f6 24.Nd7 Nd5 25.e4 Nf4 26.Nf6 Ne2 27.Kf1 Nd4 28.Nd5 Nc2 29.Rc1 Nb4 30.Ne7 Nd3 31.Rd1 (31.Rd1 Nc5 32.Rd4+–) 1–0. Fournier,Frederic (1885) – partialles (1775), Active (5/0), 2005.

5.a3 Nd7 6.c4 dc4 7.Bc4 Nb6 8.Be2 Bd3 9.0–0 f6 (9...Nf6 10.Bd4 Be2 11.Qe2+=) 10.Nd4 (10.Nc3 e5+–) 10...Be2 11.Qe2 e5 12.Nb3 Qd5 13.Na5 Na4 (13...0–0–0 14.d4+–) 14.Nc3 Nc3 15.dc3 Qf7 (15...b6 16.Nc4+–) 16.Rfd1 Nh6 17.Rd2 Rd8 18.Rad1 Rd2 19.Qd2 Qc7 20.Nb7! Nf7 (20...Qb7 21.Qd8 Combination) 21.Na5 Be7 22.c4 0–0 23.Qd7 Rd8 (23...Rd8 24.Qg4 f5+–). Nordhorn,Horst (1735) – Schiller,Jan_Hendrik (1825), Bremen Silvester Open, 2018.

5.a3 Nd7 6.c4 dc4 7.Bc4 Ngf6 8.d4 Bb1 9.Qb1 Be7 10.0–0 0–0 11.e4 Nb6 12.Bb3 Qc7 13.e5 Nfd5 14.Bc2 h6 15.Bc1 Nc3 16.Qb3 Ne2 17.Kh1 Nc1 18.Rac1 Rad8 19.Qd3 g6 20.Nd2 Nd5 21.Ne4 b6 22.Qg3 Kh7 23.f4 Nc3 24.Nc3 Rd4 25.Ne4 c5 26.bc5 bc5 27.Nf6 Bf6 28.ef6 Qd8 29.Qh4 Rd5 30.Rfd1 Rh5 31.Qh5 Rg8 32.Rd8 Rd8 33.Qc5 Kg8 34.Qe7 Rf8 35.Bg6 h5 36.Bf7 Rf7 37.Rc8 Kh7 38.Qf7 Kh6 39.Qg7 1–0. varin123 – hustler1, playok.com, 2012.

5.a3 Nd7 6.d4 Bg4 7.c4= f5 (7...Ngf6 8.h3 Bf5 9.Nbd2=) 8.h3+= White gets the initiative 8...Bf3 9.Qf3 Ngf6 10.g4 g6 11.Nc3 Ne4 (11...Nb6 12.c5 Nbd7 13.gf5 ef5 14.Bg2=) 12.gf5+– ef5 (12...gf5!? 13.Qh5 Ke7+–) 13.cd5 Nc3 14.Bc3 cd5 (14...Rc8 15.Rc1+–) 15.Qd5+– Nf6?? (better 15...Rc8 16.Bb2 Be7+–) 16.Bb5 Nd7 (16...Ke7 17.Qb7 Kd6 18.d5+–) 17.Qe5 (17.Qe5 Qe7 18.Qh8+–) 1–0. Grandie – Guestfree, internet, 2021.

5.a3 Nd7 6.Be2 Ngf6 7.Nh4 Bg4?? (better is 7...Bg6=) 8.Bg4+– Ng4 9.Qg4 Nf6 10.Qe2 Bd6 11.Nf3 Qd7 12.0–0 0–0–0 13.c4 Ng4 (13...dc4 14.Qc4 Bc7 15.Bd4+–) 14.cd5 ed5 15.Rc1 (15.Bg7 Rhe8 16.Bd4 Kb8+–) 15...Qc7 16.h3 Bh2 (16...Ne5 17.Be5 Be5 18.d4+–) 17.Kh1 Nf6 (17...Be5 18.d4 (18.hg4?! Bb2 19.Nc3 Ba1 20.Ra1 h5+/–) 18...Nf2 19.Qf2+–) 18.Nh2 Qd6 19.b5 Kb8 20.Nf3 (20…Rhe8 21.bc6 bc6 22.Nd4+–) 1–0. Woschkat,Karl_Heinz – Steingraeber,Barbara, remoteschach.de, 2002.

5.a4 Bb4?? 6.Bg7 Nf6 7.Bh8 +–.

5.a4 h6 6.Na3 Nf6 7.b5 Be7 8.Be2 0–0 9.0–0 Nbd7 10.c4 Rc8 11.d4 (11.Nd4 Bh7+=) 11...Bd6 (11...Qa5!?–/+) 12.c5+= Bb8 (12...Be7 13.Nc2+=) 13.Bd3 (13.bc6 bc6 14.Ba6 Bc7 15.Bc8 Qc8+=) 13...Bd3+= 14.Qd3 Re8 15.Qc2 e5 16.Nb1 (better is 16.g3!?+=) 16...e4–+ 17.Nfd2?? (better is 17.Ne1–+) 17...Bh2 18.Kh2 (18.Kh1 Ng4 19.g3 Qg5 20.Ne4 Qh5–+) 18...Ng4 19.Kg3 (19.Kh3 Qg5 20.Nf3 ef3–+) 19...Qg5 20.f4 Qg6 (20...Qg6 21.f5 Qh5–+) 0–1. Popov,Vjacheslav – Kuznezov,Albert (2080), Tula Region–ch sf, 2006.

5.a4 h6 6.b5 a6 7.c4 ab5 8.ab5 Ra1 9.Ba1 Nf6 10.Nc3 Be7 11.Be2 0–0 12.0–0 Nbd7 (12...dc4!? 13.Bc4 Bd3 14.Bd3 Qd3=) 13.Nd4+= Qc7 14.Nf5 ef5 15.h3 (15.bc6 bc6 16.cd5 cd5+/–) 15...f4 16.bc6 bc6 17.cd5 cd5 18.Qa4 fe3 19.de3 Rd8 20.Rd1 Nc5 21.Qa2 Qb7 22.Bf3 Nce4 (22...Qb3 23.Bd5 Rd5 24.Qa8 Kh7 25.Rd5 Nd5 26.Qd5+/–) 23.Rb1 (23.Nd5 Rd5 24.Rd5 Qd5 25.Qd5 Nd5 26.Be4 Nf6+–) 23...Nc3 (23...Qc6!? 24.Qa7 Qe6=) 24.Rb7+/– Na2 25.Re7 Nb4 26.Rb7 Nc6 27.Rc7+– Rd6 28.Bf6 Rf6 29.Bd5 Ne5 30.Be4 g6? 31.f4 Nd3 32.Bd3 Rd6 33.Bc4 Rd1 34.Kf2 Rd2 35.Kf3 Rd6 36.Rf7 g5 37.Rd7 (37.Rd7 Kf8 38.Rd6 gf4 39.ef4+–) 1–0. Poschmann,Hans – Groener,Marga, Wch Seniors, 2003.

5.c4 Bb4?? 6.Bg7 Nd7 7.Bh8 f6 (7...dc4 8.Bc4 Nb6 9.Be2+–) 8.Nd4 Nh6 (8...Ne7 9.cd5 cd5 10.Bb5+–) 9.Qh5 Nf7 10.Nf5 ef5 11.cd5 cd5 12.a3 Qa5 13.Be2 0–0–0 (13...Rc8 14.0–0+–) 14.Qf7 (14.Bf6!? Nf6 15.Qf5 Nd7 16.Qf7 h6+–) 14...Rh8 15.0–0 Bd2 (15...Bd6+–) 16.Nd2 Qd2 (16...Rf8 17.Qe7 Qd8+–) 17.Rfc1 Kd8 18.Bb5 (18...Qe1 19.Re1 Ne5 20.Qf6 Kc7 21.Qe5 Kb6 22.Qd6 Kb5 23.Rab1 Kc4 24.Red1 d4 25.Qd4#) 1–0. pereira – William7o20602, internet, 2007.

5.c4 Bb4?? 6.Bg7 f6 7.Bh8 Kf7 (7...Be4 8.cd5 ed5 9.Be2+–) 8.Be2 (8.Nd4 Ne7 9.Nf5 Nf5+–) 8...Nh6 (8...dc4 9.Bc4 b5+–) 9.Bf6! Qf6 (9...Qf6 10.Nd4; 9...Kf6 10.Qb3) 10.Nd4 Bc5 (10...c5 11.Qb3 (11.Nf5?! Nf5 12.Nc3 Bc3 13.dc3 Qc3 14.Kf1 d4+–) 11...Kg6 12.Nc2+–) 11.Nf5 Qf5 (11...Nf5 12.Nc3 Kg8 13.d4+–) 12.0–0 Qf6 13.Nc3 Bb4 14.cd5 ed5 15.Bh5 Kg7 16.Qf3 Qf3 17.Bf3 Bc3 18.dc3 Nd7 19.Rfd1 Nf6 20.Rd4 Rd8 21.Rad1 Nf5 22.Rf4 Nh6 23.e4 Nf7 24.ed5 cd5 25.Rf5 b6 26.Bd5 Nd5 27.Rfd5 (27...Rd5 28.Rd5+–) 1–0. gtate (1945) – johndeere (2045), net–chess.com, 2004.

5.c4 dc4 6.Bc4 Nd7 (6...Bd3 7.Qb3 Bc4 8.Qc4=) 7.0–0 Ngf6 (7...Bb4 8.Bg7 Nb6 9.Be2+– (9.Bh8?! Nc4 10.Qb3 Nd2 11.Qb4 Nf1+–)) 8.a3 h6 (8...Nb6 9.d3=) 9.Nc3 Be7 (9...Nb6 10.d3=) 10.d3 (10.Nd4 Bg4 11.f3 Ne5+=) 10...0–0 (10...Nb6 11.Nd4 Nc4 12.dc4=) 11.h3 (11.Nd4!?+=) 11...Nb6= 12.e4 (12.Nd4 Nc4 13.dc4 Bg6=) 12...Bg6 (better is 12...Ne4!? 13.de4 Nc4 14.Qd8 Rad8 15.ef5 Nb2 16.fe6 fe6–/+) 13.Bb3 (13.Re1 a5 14.b5 Nc4 15.dc4 Qc7=) 13...Qc7 (13...Bh5 14.d4=) 14.Qe2 (14.Qc2 c5=) 14...Rad8 (14...c5 15.bc5 Bc5 16.Na4=) 15.Rad1 (15.Rfc1 e5=) 15...Bh5 (15...Qf4 16.Qe3 Qe3 17.fe3=) 16.Qe3 (16.d4 Qf4=) 16...Bg6 (16...Rd7 17.d4+=) 17.Nh4 (17.d4 Qd6+=) 17...Bh7 18.f4 (18.g3 c5=) 18...Nfd7 (better is 18...Ne4 19.de4 Bh4=+) 19.e5?? (better is 19.Nf3+=) 19...Bh4–+ 20.Ne4 Be4 21.de4 Be7 22.g3 Rfe8 23.f5 ef5 24.ef5? Bg5 25.Qc3 Nd5 26.Qc4?? Ne5 27.Be5 Qe5 28.Rfe1 Qg3 29.Kf1 Re1 30.Re1 Qh3 31.Kg1 Qg3 32.Kf1 Qf4 33.Qf4 Bf4 34.Kf2 Bg5 35.Kf3 Kf8 36.Rd1 Nb6 37.Rd8 Bd8 38.Ke4 Bf6 (39.a4 g5–+) 0–1. wach – imqt, Caissa.com, 2004.

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

5.c4 Nf6 6.a3 Nbd7 7.d4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 c6 6.a3 Nbd7 7.d4).

5.d3 Bb4 6.Nbd2 Nf6 7.a3 (7.Rb1 Qa5–/+) 7...Bd6 8.c4 (8.Be2 0–0–/+) 8...Nbd7 9.Be2 h6 (9...e5 10.d4 e4 11.Ne5–/+) 10.0–0 0–0 11.Qc2 Bh7 (11...e5 12.c5 Nc5 13.Be5–/+) 12.e4 (12.Rab1 Qe7–/+) 12...de4 13.de4 (13.Ne4 Ne4 14.de4 Nc5–/+) 13...Nc5–+ 14.e5?? (better 14.Bf6 Qf6 15.Rfd1–+) 14...Bc2 15.ef6 gf6 16.Rfe1 (16.Bd4 Kg7–+) 16...e5 17.Nh4 (17.Bc1 e4 18.Nh4 Qa5–+) 17...Qa5 18.Ndf3 (18.Rac1 Qa4–+) 18...Nb3 19.Ra2 e4 20.Nd4 (20.Bf6 ef3 21.Nf3–+) 20...Qe1 21.Bf1 Bd3 (21...Bd3 22.Ra1 Na1 23.Ne2 Be2 24.Ba1 Qf1) 0–1. Goldmund,Heike – Roque,Pedro, FICGS, 2014.

5.Nd4 Bg6 6.c4 dc4=+ 7.Bc4 Qg5 (7...Bb4 8.Ne6 fe6 9.Bg7+–) 8.0–0 Be4 9.f3 Bb1 10.Rb1 Bb4 (10...b5 11.f4 Qd8+–) 11.Qb3 c5 (11...Bd2?? 12.Qb7 Be3 13.Kh1+–) 12.Nb5 Na6 13.f4 Qg6 14.f5! Qh6 (14...ef5 15.Bf7 Double attack) 15.Nd6 (worse 15.fe6 0–0–0 16.ef7 Nf6+–) 15...Ke7 16.fe6 Kd6 (16...Qg6 17.Rf7 Qf7 18.ef7 Nh6+–) 17.Qd3 Kc6 18.Qd7 Kb6 19.Qb5 (19.Qb5 Kc7 20.Be5 Kd8 21.Qd7) 1–0. pcmvr – iozeph, net–chess.com, 2018.

5.Be2 Bb4?? 6.Bg7 Nd7 7.Bh8+–.

5.Be2 Bd6 6.Bg7 Bb4 7.Bh8 f6 8.Nd4 Qe7 9.Nf5 ef5 10.Bd3 Nh6 11.Qh5 Nf7 12.Qh7 Nd7 13.c3 (13.Bf5 0–0–0 14.Bd7 Kb8+–) 13...Bd6 14.Bf5 0–0–0 15.Bd7 Qd7 (15...Rd7 16.d4 f5 17.Nd2+–) 16.Bf6 Re8 17.0–0 Qe6 18.Qh3 Qh3 19.gh3 Re6 20.Bh4 Rh6 21.Bg3 Rh3 22.Bd6 Nd6 23.d3 Nf5 (23...Rh8 24.Nd2+–) 24.Nd2 Nh6 (24...Rh8 25.Kg2+–) 25.Kg2 Rh5 26.f4 (better is 26.Rg1!? Kd7+–) 26...Ng4 27.h3 (better is 27.Rh1 Ne3 28.Kf2 d4 29.cd4 Nd5+–) 27...Ne3 28.Kg3 c5 (28...Nf1 29.Rf1 Kd7+–) 29.Rf3 d4 30.cd4 cd4 (30...Nc2 31.Kg4 Rd5 32.Rb1 Nd4 33.Re3+–) 31.Re3! de3 32.Nc4 Rd5 33.Ne3 Rd3 34.Kf3 (34.Rc1 Kb8 35.Kf3 Rd7+–) 34...b5 (34...Rd2 35.Rc1 Kd7 36.Rd1 Rd1 37.Nd1+–) 35.f5 (better is 35.Rc1 Kb7+–) 35...Kd7 (35...Ra3 36.Rd1 Ra6 37.Rd2+–) 36.Rd1 Rd1 37.Nd1 a5 (37...b4+–) 38.Nc3 b4 39.Nd5 Kd6 40.Ke4 1–0. mr5reasons1 (1695) – manyanik, gameknot.com, 2012.

5.Be2 e5 6.0–0 Bb4 7.c4 Ne7 8.Nc3?? (8.Qb3 Na6 9.Be5 f6+=) 8...Be6?? (better is 8...d4–+) 9.cd5 Nd5 10.Nd5 Bd5 11.d4 (better is 11.Be5!? f6 12.Bg3=) 11...e4–/+ 12.Nd2 Qc7 (12...Nd7!?–/+) 13.Qc2 f5 14.Nc4 Nd7 15.Ne5 Ne5 16.de5 0–0–0 (16...0–0 17.Bd4–/+) 17.f3 Rhf8 18.f4 Be7 19.a4 a6 20.Rfc1 (20.Bd4 c5 21.Rfc1 Kb8=) 20...Be6 (better is 20...Qb6!? 21.Bd4 Qb3–/+) 21.Bd4 Rd7 22.Rab1 c5 23.Bc5 Bc5 24.Qc5 Qc5 25.Rc5 Rc7 26.Rc7 Kc7 27.a5 Rd8 28.Kf2 Rd2 29.Rc1 Kb8 30.Rd1 Rd1 31.Bd1 Kc7 32.Ba4 b5 33.ab6 Kb6 34.Ke2 Kc5 35.Kd2 Kb4 36.Bc2 a5 37.Kc1 a4 38.Kb2 h6 39.g4 g6 (39...a3 40.Ka1 Kc3 41.Bb1–/+) 40.gf5 (better is 40.Bb1 a3 41.Ka1=+) 40...gf5 41.Bb1 a3 42.Ka1 Kc5?? (better is 42...Kc3 43.Ba2 Bd7–/+) 43.Ba2+/– Bc8 44.Bf7 Kc6 45.Ka2 Kd7 46.Ka3 Ke7 47.Bc4 Bd7 48.Kb4 Bc8 49.Kc5 Bd7 50.Kb6 Be8 51.Kc7 Bg6 52.h4 Bh5 53.Kc6 Be8 54.Kd5 Bf7 55.Kd4 Be8 56.Kc5 Bg6 57.e6 h5?? (better is 57...Bh5+/–) 58.Kd5+– Bh7 (58...Kf6+–) 59.Ke5 Bg6 60.Bf1 Be8 61.Bh3 Bg6 (61...Ba4 62.Bf5 Bb3+–) 62.Bf5 (62...Be8 63.Be4+–) 1–0. Toth,Tamas – Urban,Bela Laszlo, Sarospatak–ch, 1998.

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

5.h3 Nd7 6.b5 h6 7.c4 Qa5 8.bc6 bc6 9.cd5 cd5 10.Nd4 Bh7 11.Nc3 Ngf6 12.Rc1 a6 13.Na4 Nc5?? (better 13...Qb4=) 14.Nc5+– Bc5 15.Nb3 Qa2 16.Bf6 (16.Nc5?! Qb2 17.Ba6 0–0=+) 16...gf6 (16...Be3 17.Ra1 Qc2 18.Bb5 Kf8 19.de3 Qd1 20.Kd1 gf6 21.Ra6 Ra6 22.Ba6+–) 17.Nc5 Qa3 (17...Rg8 18.Ra1 Qb2 19.Ba6+– (19.Ra6?! Ra6 20.Ba6 Bc2 21.Bb5 Kf8+–)) 18.Be2 (18.Rc3 Qa5 19.Na6 0–0+–) 18...Ke7 (18...Rg8 19.g4+–) 19.0–0 Rhc8 20.d4 (20.Na6 Kd8 21.Rc8 Kc8 22.Qc1 Qc1 23.Rc1 Kd8+–) 20...a5 21.Ba6 (21.Ra1 Qc3+–) 21...Rc7 (21...Rc5 22.Rc5 (22.dc5?! Ra6 23.c6 Ra8+–) 22...Ra6 23.Rc7 Kd8 24.Rf7+–) 22.Qg4 Kf8 (22...Bf5 23.Qf4 Raa7+–) 23.Ne6! fe6 24.Rc7 Ra6 (24...Qe7 25.Re7 Bg6 26.Rb1 Re8 27.Qg6 Ke7 28.Qg7 Kd6 29.Rb6) 25.Qg7 Ke8 26.Rc8 1–0. pcmvr – pops (2485), net–chess.com, 2016.

5.a3 Nf6

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

6.d4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.d4 e6 6.a3).

6.Nd4 Bg6 7.Be2 Bd6 8.f4 Nbd7 9.0–0 Qc7 10.Nc3 e5 11.fe5 Be5 12.Nf3 Bd6 13.Qc1 Be4 14.h3 Bg6 15.Nh4 Bg3 16.Ng6 hg6 17.Kh1 0–0–0 18.b5 g5 19.bc6 Qc6 20.Nb5 Kb8 21.Rf3 Bh4 22.Bd4 b6 23.a4 g4 24.Rf1 gh3 25.gh3 Ne4 26.Kg2 Qg6 27.Bg4 Ndf6 28.Be5 Kb7 29.Rf4 Bg5 30.Bf6 Bf6 31.Rb1 Be5 32.Re4 de4 33.a5 f5 34.Na7 Bc7 35.ab6 Bb6 0–1. Troken – zweitausend, itsyourturn.com, 2001.

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

5.a4 Nf6

6.b5 c5 7.d3 Bd6 8.Be2 Nbd7 9.Nh4 Bg6 (9...0–0 10.Nd2=+) 10.Nd2 b6 (10...Qc7 11.g3=) 11.h3 0–0 12.0–0 e5 Black intends d4 (better 12...Qc7!?=) 13.Ng6 hg6 14.e4 d4 15.Nc4 Bc7 16.Bc1 Ne8 17.Bf3 Nd6 18.Nd6 Bd6 19.Bd2 a5 20.ba6 Ra6 21.Qb1 Qc7 22.Qb5 Rfa8 23.Rfb1 Nf6 (23...Nb8 24.Qc4+=) 24.Bd1 (24.Qc4 Qc6 25.a5 ba5=) 24...Qd7 (24...c4!?=) 25.c3 Qb5 26.Rb5 (26.ab5?? Ra1 27.Ra1 Ra1–+) 26...Bc7 27.cd4 ed4 28.g4 (28.Bc2 Ne8+=) 28...Ne8 (better 28...c4!?=) 29.Rab1 Nd6 30.R5b2 Re8 31.Bf4 Rd8 32.Bg3 Rd7 33.Bb3 (33.e5 Nb7 34.Bb3 Nd8+–) 33...Kf8 (33...c4!? 34.Bd6 cb3+=) 34.e5+– Ne8 35.Bc4 Ra7 (35...Ra4?? 36.Bb5 Ra3 37.Bd7+–) 36.Bb5 (36.Re1!?+–) 36...Re7+= 37.f4 f6 (37...g5 38.fg5 Be5 39.Be5 Re5 40.Bc6+=) 38.Re1 fe5?? (better 38...g5 39.fg5 Be5 40.Be5 Re5 41.Re5 fe5+=) 39.fe5+– Kg8 (39...g5 40.Rf1 Kg8 41.Rbf2+–) 40.g5 (40.Bh4 Nf6 41.Rbe2 Bd8+–) 40...Kh8 (40...Kf8 41.Bc4 Rf7 42.Bf7 Kf7 43.e6 Ke7 44.Bc7 Rc7 45.Rb6 Nd6+–) 41.Rbe2 (41.Re4 Nf6 42.ef6 Rf7 43.Bc7 gf6 44.Bb6 fg5+–) 41...Bb8 (41...Ra5+–) 42.Kg2 (better 42.Rf2 Nf6 43.gf6 gf6 44.Rf6+–) 42...Nc7 43.Bc6 (43.Rf1 Ne6+–) 43...Ne6+– 44.h4 Kg8 45.Kh3 Rac7 (45...c4 46.dc4 Nc5 47.Rd2+–) 46.Bd5+– Rcd7 47.Bc4 Kh7 48.Kg4 Ra7 49.Bb5 Nc7 50.Bc6 Ne6 51.Rh2 White prepares h5 51...Rac7 (51...c4 52.h5 Nc5 53.dc4 gh5 54.Rh5 (worse 54.Kh5 Re6 55.Bd5 Ra4+–) 54...Kg6 55.Rh8 Be5 56.Re5+–) 52.Bb5 (52.Be4 Kg8 53.h5 gh5 54.Rh5 g6 55.Bg6 c4+–) 52...Kg8? (52...Ra7+–) 53.Bc4 Ra7 (53...Rc8 54.h5 gh5 55.Rh5 g6+–) 54.Bb3 (54.h5 Kh7 55.Bd5 Nc7+–) 54...Bc7?? (better 54...Re8+–) 55.h5 gh5 (55...Kf7 56.Bd5 Re8 57.Rf1 Ke7 58.hg6 Kd8+–) 56.Rh5 g6 (56...Kf7 57.Bd5 Re8 58.g6 Ke7 59.Bc6+–) 57.Rh6 Kg7 (57...Bd8+–) 58.Reh1 Nf8 59.Rh8 (59.Rh8 Rf7 60.Bf7 Kf7 61.Rf1 Ke6 62.Rff8 Be5 63.Be5+–) 1–0. Krafzik,Joachim (1940) – Bendisch,Juergen (1830), Meran, 2001.

6.b5 Bd6 7.Be2 0–0 8.Nh4 Be4 9.d3 Nfd7 10.de4 Qh4 11.ed5 cd5 12.h3 Rc8 13.0–0 Qb4 (13...Ne5 14.Nd2=) 14.Bd4 (14.Ra2 a6=) 14...e5 15.Bc3 Rc3 16.Nc3 Qc3 17.Qd5 Qc7 (17...Qc2? 18.Bf3 Qg6 19.Rfd1+–) 18.Rfd1 Bf8 (18...Qc2?? 19.Bc4 (worse 19.Qb7 Bf8+–) 19...Qf5 20.Qb7+–) 19.a5 Nf6 (19...Qc2?? 20.Bc4 Qg6 21.Qb7+–) 20.Qd8 Qc2 (better 20...Qc5=) 21.Bf3+– e4 22.Rac1 Qa4 23.Rc8 Nbd7? (better 23...Qa3 24.Be2 Nc6 25.bc6 Rc8 26.Qc8 bc6+–) 24.Ra8+– ef3 25.Rd7 Qa1 (25...Nd7 26.Qd7 Qb4+–) 26.Rd1 (26.Rd1 Qa3 27.gf3+–) 1–0. onur604 (2320) – Mobashi (2110), lichess.org, 2020.

6.b5 Bd6 7.Be2 Nbd7 8.Nd4 c5 (8...Be4 9.bc6 bc6 10.Nc3=) 9.Nf5+= ef5 10.c4 Be5 (10...dc4 11.f4=) 11.d4+= Bd6 (11...cd4 12.ed4 Bf4 13.g3+=) 12.cd5+– 0–0 13.0–0 f4 14.dc5 Nc5 15.ef4 Bf4 16.g3 Bc7 17.Nc3 Re8 18.Bc4 Ba5 19.d6 Nfe4? (better 19...Bc3 20.Bc3 Nfe4+=) 20.Ne4+– Re4 (20...Ne4 21.Qg4 Qg5 22.Qg5 Ng5 23.Rfd1+–) 21.Bd5 Re8 (21...Rb4 22.Ba3 Ne6 23.Bb4 Bb4 24.Be6 fe6+–) 22.Qg4 (22.Qg4 Re5 23.Be5+–) 1–0. DEFFM – GuestKFPL, freechess.org, 2018.

6.b5 Nbd7 7.c4 Bd6 8.Be2 0–0 9.0–0 Qc7 10.d4 Ne4 (10...dc4 11.Na3 c3 12.Bc3+=) 11.h3 (11.c5 Be7=) 11...cb5 (11...dc4 12.Bc4 Nb6 13.Nbd2–/+) 12.cd5 (better is 12.c5!? Be7 13.ab5+=) 12...ed5–/+ 13.ab5 Rfc8 14.Bd3 Ndf6 (14...Nb6!?–/+) 15.Qb3 Qd7 16.Ne5 Qe6 17.Be2 Be5 18.de5 Nd7 19.Nc3 Ne5 20.Nd5? (better is 20.Rfd1!? Nc3 21.Bc3+=) 20...Nd2–+ 21.Qa2 Nf1 22.Be5?? (better is 22.Bf1 Be4 23.Nb4–+) 22...Qe5 (better is 22...Rc2 23.Bb2 Re2 24.Kf1–+) 23.Bf1 (23.f4 Qe6 24.Kf1–+) 23...Be6 (better is 23...Rc2 24.Qa5 Qd5–+) 24.Ne7? (24.Rd1 Rc5 25.Bc4 h6–+) 24...Kf8 (better is 24...Kh8 25.Qa3 Re8–+) 25.Qa3 Rc5 26.Rc1 b6 27.Nc6 Qd6 28.Rc5 Qc5 29.Qa6 Bc8 30.Qa2 Bb7 31.Bc4?? Bc6 32.bc6 Qc6 33.Bf7 Qc1 34.Kh2 Qc7 35.f4 Qf7 (35...Qf7 36.Qa3 Kg8–+) 0–1. Agrest,Anton (1780) – Mohd,Irfan Haqqim B Azha, Wch U12 Kemer, 2009.

6.b5 Nbd7 7.Be2 Rc8 8.bc6 bc6 9.0–0 Bd6 10.c4 (10.Nc3 Rb8 11.Rb1 0–0+=) 10...e5 (10...Rb8!? 11.Ra2 Qc7+=) 11.Ba3 Ba3 12.Na3 Ne4 (12...0–0 13.d4 e4 14.Nd2=) 13.Qc1 (13.d3!? Nc3 14.Qc2 Ne2 15.Qe2+=) 13...0–0+= 14.d4 Re8 15.de5 Ne5 16.Ne5 Re5 17.cd5 cd5 (worse is 17...Qd5 18.Nc4 Ree8 19.Rd1+–) 18.Qb2 Qf6 (18...Nc3 19.Ba6 Rc6 20.Nb1 Bb1 21.Rab1+=) 19.Rac1= Rce8 20.Bb5 1–0. Poleschi,Ricardo D – Molina,Marcelo, Friendly UECC Email, 1999. (=1.Nf3 c6 2.b4 d5 3.Bb2 Bf5 4.e3 e6)

6.b5 Be7 7.Be2 0–0 8.0–0 Nbd7 9.d4 Rc8 10.Nh4 Be4 (10...Bg4 11.Bg4 Ng4 12.Qg4 Bh4 13.Ba3=+) 11.f3 Bg6 12.Ng6 hg6 13.c4 c5 (13...cb5 14.ab5 dc4 15.Ra7=) 14.Nd2 (14.a5 dc4 15.Bc4 cd4 16.Qd4 b6=) 14...dc4 (14...cd4!? 15.ed4 dc4 16.Nc4 Nd5=) 15.Nc4+= cd4 16.Bd4 b6 17.a5 Bc5 18.ab6 ab6 19.Ra7 Bd4 (19...Rc7 20.Rc7 Qc7 21.Qa1+=) 20.Qd4+– Rc5 21.e4 Rb5 22.Rd1 Rb4 (better 22...e5!? 23.Qd3 Kh7+–) 23.Qd6+– (23.Rd7?! Nd7 24.Qd7 Qd7 25.Rd7 Ra8+–) 23...Qc8?? (23...Rb3 24.e5 Qb8 25.Qb8 Rb8 26.ef6 Nf6+–) 24.Qb4 (24.Rd7?! Rc4 25.Bc4 Nd7 26.Be6 Qc5 27.Qc5 A) 27...bc5?? 28.Bd7 (28.Rd7?! fe6 29.Rc7 g5+–) 28...Rd8 29.Rd5+–; B) 27...Nc5+=) 1–0. DEFFM – GuestNMGK, freechess.org, 2018.

6.b5 h6 7.Nd4 Bh7 8.bc6 (8.f4 a6=+) 8...Nc6=+ 9.Bb5 Qc7 10.0–0 a6 (10...Bd6 11.f4=+) 11.Bc6 (11.Bd3!?=) 11...bc6=+ 12.Nf3 Bd6 13.Bf6 gf6 14.d3 Rg8 15.Nbd2 Bg6 16.g3 Bh5 (16...Qa5 17.e4=+) 17.c4= Kf8 18.Qc2 Kg7 19.Rfc1 Rgc8 20.cd5 (20.Rab1!?=) 20...cd5=+ 21.Qc7 Bc7 22.Rab1 Bg6 23.Rb7 Ba5 (23...Bd6 24.Rc8 Rc8 25.d4–/+) 24.Rc8 Rc8 25.Nb3 Bd8 26.d4 Bc2 (26...Rc7 27.Rc7 Bc7 28.Nc5=) 27.Nc5= Kf8 28.Ne1 Bd1 29.Kf1 Ba5 (29...a5 30.Rb5+=) 30.Rb1 Be1? (better 30...Bg4!?+=) 31.Ke1+– Bc2?? (31...Bg4!?+–) 32.Rb2 (better 32.Rc1 Ba4 33.Ne6 fe6 34.Rc8 Kf7 35.Rc7 Kg6 36.Re7+–) 32...Bg6 33.Na6 Rc1 34.Kd2 Rf1 (34...Ra1 35.Nc5+–) 35.Kc3 Rc1 36.Kb4 Rc4? (36...Ke8 37.Ka5 Rc8 38.Rb8 Rb8 39.Nb8+–) 37.Kb5 Bd3 (37...e5+–) 38.Nc5 Rc2 (38...Bf1 39.Kb6 Ke7+–) 39.Nd3 (39.Nd3 Rc3 40.Nc5+–) 1–0. onur604 (2320) – meopatacca (1975), lichess.org, 2020.

6.d3 Bb4 7.c3 Be7 8.Ne5 (8.Be2 Bg4–/+) 8...Qb6 (8...0–0 9.g4 Bg6 10.Ng6 fg6 11.f4–/+) 9.Qc1 (9.Ba3 Ba3 10.Ra3 Qc7–/+) 9...Nbd7–+ 10.Nd7 Nd7 11.c4 Bf6 (11...0–0 12.a5 Qd8 13.Be2–+) 12.Bf6–/+ Nf6 13.cd5 cd5 (< 13...Nd5 14.e4 Qd4 15.Ra3 Be4 16.de4 Qe4 17.Kd1=+) 14.Ra2 Qb4 15.Nd2 0–0 16.f3 (16.Qb2 Qe7–/+) 16...Rac8 17.Qa3 (17.Qb2 Qh4 18.Kd1 Rc7–+) 0–1. saddamfalseteeth – aksakal, Live Game Caissa's Web, 2004.

5.b5 Nf6

6.a4 Bd6 7.Be2 =+.

6.a4 Be7 7.c4 0–0 8.Nc3 =+.

6.a4 Be7 7.c4 dc4 8.Bc4= 0–0 (8...a6 9.Nd4 ab5 10.ab5 Ra1 11.Ba1=) 9.0–0 (9.d3 cb5 10.ab5 Nbd7=) 9...cb5=+ 10.ab5 Qc7 (10...Bd3 11.Bd3 Qd3 12.Qa4=+) 11.Qe2 Nbd7 12.Rc1 Rfc8 13.Na3 (13.Nd4 Bb1 14.Rab1 Qd6=) 13...Qd8 14.d4 (14.d3 Bg4=) 14...Bg4 (14...Nb6 15.Bb3=) 15.h3 (15.Bd3 Nb6=) 15...Bh5 16.Rd1 (16.Bd3 Rc1 17.Rc1 Nd5=) 16...Nb6 (16...Bf3 17.gf3 Nd5 18.Rdc1=+) 17.Bb3 (17.Bd3 Na4=) 17...Ne4=+ 18.Nc4 (18.g4 Bg6=+) 18...Ng5 (18...Bh4 19.g4 Bf2 20.Kg2 Nd5 21.gh5 Rc4–+) 19.Nce5= Nd5 (19...Nf3 20.Nf3 (< 20.gf3 Bd6–/+) 20...Nd5 21.Rdc1=) 20.Rdc1 (20.g4 Nc3 21.Bc3 Rc3 22.Ng5 Rb3+–) 20...Bb4 (20...Rc1 21.Bc1 Bd6 22.g4 Nh3 23.Kg2–/+) 21.e4 Nc3 22.Qd3 Nce4 23.Ng5= Rc1 24.Bc1–/+ Ng5 25.h4 f6 26.Bg5 fg5 27.Be6 Kh8 28.Bf5 Bd6 29.Re1 Qa5 30.Rc1 Be5 31.de5+/– Rd8 32.Qe3 Qb5 33.hg5 Be8 34.g6 hg6?? 35.Qh3?? Kg8 36.Be6 Bf7 37.Bf7 Kf7 38.Qf3 Kg8+= 39.Qg3 Qb6 40.Re1 Re8 41.Rd1 Qe6 42.f4 Qb6 43.Kh2 Kf7 44.Rd7+= Re7 45.Rd6 Attacks the isolani on g6 45...Qb1 46.Qe3 Qb4 47.Qg3 Re6 48.Re6 Ke6 49.Qg6 Kd5 50.Qg7 Ke4?? 51.Qg3 Qb2 52.Qf3+– Kf5 53.Kh3 Qb6 54.g4 (54...Ke6 55.Qc3+–) 1–0. Heinola – Korhonen, Vantaa we Etvas, 1984.

6.a4 Be7 7.Be2 0–0 =.

6.a4 Be7 7.Ne5 Bd6=+ 8.Be2 Nbd7 (8...0–0 9.g4 Be4 10.f3=) 9.Nd7 Qd7 10.g4 (10.0–0=) 10...Bg6 (10...Be4 11.f3 Bg6+–) 11.g5+= Ne4 12.d3 Nc5 (< 12...Ng5 13.h4+–) 13.Bg7 Rg8 14.Bf6 (14.Bc3 h6 15.gh6 Bh7+=) 14...Qc7 (14...cb5 15.ab5 Qb5 16.f4=) 15.h4 (15.f4 e5 16.Bg4 ef4 17.ef4 Bf4 18.bc6 Qc6 19.Qe2 Ne6+=) 15...Nd7 16.Bb2 Be5 (16...e5 17.Nd2+=) 17.Be5+/– Qe5 18.Nd2 c5 (18...Qc3 19.h5 Bf5 20.bc6 bc6 21.Rg1+=) 19.Ra2 (19.a5 0–0–0+/–) 19...0–0–0 20.Nf3 Qd6 21.Nh2 f6 22.Ng4 fg5 23.hg5 Qe7 24.Nh6 Rgf8 25.Rg1 Kb8 26.Bh5 c4= 27.Bg6 hg6 28.Ke2 d4 29.e4 Rf4 30.Rg2 Rdf8 Exerts pressure on the backward pawn 31.Kf1 Ne5–/+ 32.Qe2 Nf3–+ 33.dc4?? Re4!! 34.Qd1 Re1 35.Qe1 Ne1 36.Ke1 Qb4 37.Ke2 Qc4 (38.Kd2 Qa2–+) 0–1. Hepting,Heinrich (2210) – Stickler,Roberto (2165), Landesliga Nord, 2001.

6.Nc3 Bd6 7.a4 0–0 8.d4 (8.Be2 e5+=) 8...Nbd7 (8...Qa5 9.Qd2–/+) 9.h3 (9.Bd3 Bd3 10.Qd3 c5+=) 9...e5 (better is 9...Bb4 10.bc6 bc6–/+) 10.Bd3?? (better is 10.bc6 bc6 11.de5 Ne5 12.Nd5 Nd5 13.Ne5 (13.Be5?? Qa5 14.Qd2 Bb4–+) 13...Be5 14.Be5 Ne3 15.fe3 Qa5 16.Kf2 Qe5 17.Bd3–/+) 10...e4–+ 11.Nh4 Be6 (11...ed3?! 12.Nf5 dc2 13.Qc2=) 12.Be2 Ne8 (better is 12...g5–+) 13.g3 Qg5 (13...Rc8 14.Qd2–/+) 14.Bg4 (14.Ng2!?–/+) 14...f5–+ 15.Nf5? (better is 15.Be2 Bg3! 16.Ng2–+) 15…Bf5 (15...Rf5?! 16.Bf5 Bf5 17.g4–+) 0–1. Anderson,George – Tang,Edward (1975), Winnipeg Summer op, 2003.

6.h3 h6 7.Nc3 Nbd7 (7...Bd6 8.Be2=) 8.bc6 bc6 9.Bd3 (9.Nd4 Bg6=) 9...Ne4 (9...Bd3 10.cd3 Bd6 11.Rb1=+) 10.Nd4 (10.Be4 Be4 11.Rb1 Bf3 12.Qf3 Bd6=) 10...Bg6 (10...Nc3 11.Bc3 Bd3 12.cd3=) 11.Rb1 (11.Nc6? Qb6–+) 11...Qc7 (11...Nc3 12.Bc3 Bd3 13.cd3=) 12.f4 (12.Ne4 de4 13.Ba6 Bd6=) 12...Ng3 (12...Nc3 13.Bc3 Bd3 14.cd3=) 13.Bg6 (13.Ne6 Qd6 14.Nf8 Bd3+= (14...Nh1? 15.Ng6 fg6 16.Qf3+–)) 13...Nh1 14.Qg4 Nc5 (14...fg6?? 15.Qe6 Kd8 16.Nc6 Qc6 17.Qc6+–) 15.Ne6 Qd7 16.f5 Bd6 (16...Rb8 17.Ba3 Rb1 18.Nb1=) 17.Ba3 Ne6? (17...Nd3 18.cd3 Ba3+–) 18.fe6+– Qe7 19.Bf7 Kf8 20.Rb7! Bg3 (20...Qb7 21.Bd6 Decoy) 21.Qg3! Qa3 (21...Ng3 22.Be7) 22.Qg6 (22.Qg6 Qe7 23.Re7 Ke7 24.Qg7+–) 1–0. pcmvr – iozeph, net–chess.com, 2017.

5.Be2 Nd7

6.0–0 Bb4?? 7.Bg7 Ngf6 8.Bh8 +–.

6.a3 Qc7 7.0–0 (7.Nh4 Nh6=) 7...e5 (7...Ngf6 8.Nh4=) 8.c4 e4 (8...Ngf6!?=) 9.Nd4+/– Be6 10.Ne6 (10.d3 ed3 11.Ne6 fe6 12.Qd3 Ne5+=) 10...fe6+= 11.Bh5 (better is 11.d3+=) 11...g6?? (better is 11...Kd8+=) 12.Bh8+– gh5 13.Qh5 Kd8 14.f3 Ngf6 (14...dc4 15.fe4 Ne7 16.Qh7+–) 15.Qg5 Be7 16.Bf6 Nf6 17.fe4 Ne4 18.Qg8 Kd7 19.Qa8 dc4 20.Qa7 Bd6 21.Qd4 Ng5 22.h4 Nf7 23.Rf7 (23...Kc8 24.Rc7 Kc7 25.Nc3+–) 1–0. Fahrudin87 (2010) – Netto, internet, 2006.

6.0–0 Ngf6

7.a3 Bd6 8.h3 Be4 9.Nc3 Bf3 10.Bf3 Ne5 (10...0–0 11.d4=) 11.d3 (11.Be2 0–0=) 11...Nfd7 (11...0–0=) 12.Ne2 (better is 12.Be2!?=) 12...Nf3–/+ 13.gf3 Rg8 14.f4 (14.Qd2 Qg5 15.Ng3 0–0–0–/+) 14...g5 15.Kh2 h5 (15...gf4 16.ef4 Qh4 17.Qd2–+) 16.Rg1–/+ g4 17.Rb1 (17.hg4!? Qh4 18.Kg2 Qg4 19.Kf1 Qh3 20.Ke1+=) 17...Qh4–+ 18.Rg3 Ke7 (18...0–0–0 19.Qh1–+) 19.Nd4 (19.Qh1 Ke8+=) 19...Rg6 (better is 19...Nf6 20.Qf1 Kd7–/+) 20.f5?? (better is 20.c4+=) 20...Bg3–+ 21.Kg2 (21.fg3 Qh3 22.Kg1 Qg3 23.Kf1 Rf6 24.Nc6 bc6 25.Bf6 Kf6–+) 21...gh3 (21...Qh3 22.Kg1 Qh2 23.Kf1 Qf2#) 22.Kf3 Qg4# 0–1. Kuehnel,Ann Kathrin – Baum,Sarah, Niedersachsen–ch U16/18 Girls, 2006.

7.b5 cb5 8.Bb5 Bd6 9.Nd4 Ng4 (9...Bg6 10.f4=) 10.f4 (better is 10.Nf5 Bh2 11.Kh1 ef5 12.g3 (12.Bg7 Qh4 13.Bd7 Kd7 14.Qg4 fg4–+) 12...Nf2 13.Rf2 Bg3 14.Rg2 (14.Rf5?? Qh4 15.Kg2 Qh2 16.Kf1 Qh3 17.Ke2 Qf5–+; 14.Bg7 Qh4 15.Kg1 Bf2 16.Kf1 Qh1 17.Kf2 Qd1 18.Bh8 Qc2–+) 14...Qh4 15.Kg1+/–) 10...Bc5? (better is 10...Qh4!? 11.h3 Nh6=) 11.Nf5+/– ef5 12.h3 (12.Bg7 Rg8 13.Bd4 Bd4 14.ed4 Qb6 15.Qe2 Kd8+/–) 12...Ngf6 13.Bf6 (13.Qf3!? Be7 14.Bf6 Bf6 15.c3+/–) 13...Qf6+= 14.Nc3 d4 15.Bd7 Kd7 16.Nd5 Qd6 17.c4 Rhe8 (17...dc3 18.Nc3 Rhc8 19.Qb3+=) 18.Rb1 (18.Qb1 Kc8 19.Qf5 Qe6 20.Qh7 de3 21.de3 g6+–) 18...Qc6 (18...b6!?+=) 19.Qh5+/– de3 (19...Ke6!?+/–) 20.Qf7+– Kd8 21.de3 Be3?? (21...b6 22.Rfd1 Kc8+–) 22.Ne3 Re3 23.Rfd1 Kc8 24.Qf5 Qe6 25.Qc5 (25…Qc6 26.Qe3+–) 1–0. Otte,Marco – Gieltjes,Frits, Wag.Intcomp Wageningen, 2001.

7.b5 Qb6 8.Bd4 c5 9.Bf6 Nf6 10.c4 dc4 11.Bc4 Be7 12.Nc3 0–0 13.Ne5 (13.d3 Bg4=+) 13...Qc7 (13...Bd6 14.Nf3=+) 14.f4=+ b6 (14...Bd6 15.Nf3=+) 15.d4 (better is 15.g4!? Bg6 16.Ng6 hg6 17.Qf3+=) 15...cd4=+ 16.ed4 Bd6 (16...Ng4 17.Qb3=+) 17.Nc6 (17.Qd2 Rac8 18.Rac1 Ba3=+) 17...Ne4 (17...Bf4 18.Ne7 Qe7 19.Rf4–+) 18.Ne4 Be4 19.d5 ed5 20.Bd5 Bd5 21.Qd5 Bf4 22.Rae1 (22.g3!? Be3 23.Kh1–/+) 22...Bh2 23.Kh1 Bd6 24.Rf3 (24.Rd1 Bc5–/+) 24...Bc5 25.Ref1 a6 26.Ne5? (better is 26.a4–+) 26...Rad8 27.Qc6 (27.Qe4 Rfe8 28.Rh3–+) 27...Qe5 28.ba6 Ra8 (28...Rd6 29.Qa4–+) 29.Qb7 (29.Qb5 Rfe8–+) 29...Qe7 (29...Qh5 30.Rh3 Qe2 31.Qf3 Qf3 32.Rhf3 Ra6 33.Ra1–+) 30.Qe7 Be7 31.Re3 (31.Rd3 Ra6 32.Rf2 Rfa8–+) 31...Bc5 (32.Re4 Ra6–+) 0–1. var – aksakal, Live Game Caissa's Web, 2004.

7.b5 Qb6 8.Nd4 Bg6 =.

7.b5 Be7 8.Nd4 Qc7 9.Nf5 ef5 10.c4 0–0 11.Nc3 a6 12.Qb1 g6 (12...ab5 13.cb5 f4 14.Qf5=) 13.Rc1 Qd8 14.cd5 (14.bc6!? bc6 15.Qc2+/–) 14...cb5+= 15.d3 b4 16.Nd1 Nd5 17.Bf3 N7b6 18.Qc2 Qd7 19.Qd2 Rfc8 20.Bd4 a5 21.Nb2 Bf6 22.Bf6 Nf6 23.d4 Ne4 24.Qe1 Na4 25.Nc4 f6 26.Qd1 b6 27.Nd2 (27.Qd3!?=) 27...Nac3+= 28.Qb3 Kg7 29.Rc2 Nd2 30.Rd2 Ra7 31.Rc2 Qd6 32.Rac1 (32.a3!?=) 32...Rac7 33.g3 g5 34.h3 h6 35.Kh2 Rc4 36.Bg2 R4c7 37.Kh1 (37.Bf3 f4–/+) 37...h5 38.h4 g4 39.Bf1 Qd7 40.a3 (40.Bd3 Rc6 41.Kh2 a4=) 40...Qd6 (40...Ne4 41.ab4 Nf2 42.Kg2 a4 43.Rc7 Rc7–/+ (43...ab3 44.Rd7 Kh6 45.Rc8 b2 46.Rh8 Kg6 47.Rhh7 f4 48.Rdg7 Kf5 49.Rh5 Ke6 50.Bc4 Kd6 51.Rd5 Ke6 52.Rb5 Kd6 53.Rb6#)) 41.ab4= ab4 42.Rb2 Rb8 43.Qb4 Qb4 44.Rb4 Rbc8 (44...Kg6 45.Kg2+=) 45.Bd3 Kg6 (45...Ne4!? 46.Rc7 Rc7 47.Be4 fe4 48.Rb6 Kf7+/–) 46.Rb6+– 1–0. Morriss,Pete (2005) – Bohman,Leif (1880), Rijeka CRO, 2013.

4.Nf3 f6

5.c4 dc4 6.Bc4 Nh6 7.0–0 b5 8.Bb3 (8.Be2 e5=) 8...e5 (8...Bd3+=) 9.Nh4 (better is 9.d4!? e4 10.Nfd2 Bb4 11.Qc2=) 9...Bd3–/+ 10.Re1 Na6 (10...Bb4!? 11.a3 Bc5–/+) 11.a3= Bd6 (11...Qd6 12.Qh5 g6 13.Qd1+=) 12.Bc2 Bc4 (12...Be7 13.Qf3 Nb8 14.Bd3 Qd3 15.Qh3=) 13.Nf5 Nf5 14.Bf5 0–0 15.d4 ed4 16.Bd4 g6 17.Be4 Bd5 (17...Qc7 18.Nd2 f5 19.Bf3+=) 18.Bd5 cd5 19.Nd2 Nc7 20.Nf3 a5 21.Qb3 a4 (21...ab4 22.ab4 Qe7 23.Bb6 Ra1 24.Ra1+=) 22.Qa2 Ne6 (22...Qd7 23.Red1+=) 23.Rac1 (23.e4 Nc7+–) 23...Nd4 (better is 23...Qd7!?+/–) 24.Nd4+– (24.ed4?! Rf7+=) 24...Rc8?? (24...Rf7 25.Nc6 Qd7 26.Red1+–) 25.g3 (better is 25.Qd5 Kh8 26.Rc8 Bh2 27.Kh2 Qd5 28.Rf8 Kg7 29.Rd8+–) 25...Rc1 26.Rc1 Qa8 27.Rc6 Be5 28.Qd5 Kg7 29.Ne6 Kg8 30.Nc7 Kg7+– 31.Na8 Ra8 32.Rc7! Bc7 33.Qa8 Be5 34.Qa4 Bc3?? 35.Qb5+– Be1 36.a4 f5 37.a5 Bc3 38.a6 Bf6 39.a7 Kh6 40.a8Q Kg5 41.Qf8 h5 42.Qc4 f4 43.Qf4 1–0. Valpa – Daveboy6968, playchess.de, 2006.

5.c4 e5 6.a3 Bd6 7.d4 e4 8.Nfd2 Nd7 (8...Ne7 9.Nc3=) 9.Qb3 (9.Nc3 Be6 10.cd5 cd5 11.Qb3 Kf7 12.Be2 Ne7 13.Rc1 Nb6 14.0–0 Qb8+=) 9...Ne7 (9...dc4 10.Bc4 Nh6 11.Nc3 Qe7 12.Qc2 Nb6 13.Be2 Kd8 14.Nce4 Nd5+/–; 9...Be6 10.c5 Bc7 11.Ne4 f5 12.Ned2 Ngf6 13.Bd3 0–0 14.0–0 Ne4+/–; 9...a5 10.cd5 ab4 11.dc6 bc6 12.ab4 Ra1 13.Ba1 Qe7 14.b5 c5+/–) 10.Nc3 Be6 11.c5 Bc7 12.a4 (12.Nce4 Qb8+/– (12...Nf5 13.Nc3 Qb8 14.h3 0–0+/–) 13.b5 0–0 14.Bd3 Bf5+/–) 12...0–0 (better is 12...f5!?= 13.Be2 Qb8 14.h3 b6=; 12...Bg4 13.h3 Bh5 14.b5 Rb8=) 13.Nce4+/– Bf7 (13...de4 14.Qe6 Kh8+–) 14.Nd6 (14.Nc3 b6+/–) 14...Bd6+= 15.cd6 Nf5 16.Bd3 Nd6 17.Qc2 g6 (17...f5 18.0–0+=) 18.0–0 f5 19.Nf3 Nf6 20.Ba3 a6 21.b5 ab5 22.ab5 cb5 23.Rfb1 Re8 24.Ne5 Nc4 (24...Ng4 25.Bd6 Qd6 26.Bb5 Ra1 27.Ra1 Re5 28.de5 Qe5 29.Ra8 Kg7 30.h3 Qh2 31.Kf1 Qh1 32.Ke2+/–) 25.Bc4!+– (25.Nf7?! Kf7 26.Bc5 Ra1 27.Ra1 Qc7=) 25...bc4 (25...dc4 26.Nf7) 26.Rb7 Be6 (26...Rf8 27.Qb2 (27.Nf7?! Rf7 28.Rf7 Kf7=) 27...Qa5 28.Nc6+– (28.Nf7?! Rf7 29.Rb8 Ne8+=; 28.Rf7?! Rf7 29.Nf7 Kf7=)) 27.Nc6 Ra3 (27...Qc8 28.Ne7 Re7 29.Re7+–) 28.Ra3 Qc8? (28...Qd6 29.Ra6 Qf8+–) 29.Ne7 Re7 30.Re7 (30.Re7 Bd7 31.Qa2+–) 1–0. marcosramos (2360) – wstanevans (2175), net–chess.com, 2007.

5.d4 e5 6.de5 Bb4 7.Nbd2= Bg4 8.c3 Ba5 9.h3 Bf3 10.Nf3.

5.d4 e6 6.a3 Bd6 7.c4 (7.Nh4 Ne7 8.Nf5 Nf5 9.Bd3 a5 10.b5) 7...dc4 8.Bc4 b5 9.Bb3 a5 10.Nh4.

5.d4 g6 6.c4 (6.a3 e6 7.c4 Nh6 8.Nc3 Bd6 9.Be2 Nd7 10.0–0) 6...e6 (6...e5 7.de5 Bb4 8.Bc3 Qb6 9.Qd2 Bc3 10.Nc3) 7.a3 (7.c5 b6 8.Nc3 g5 9.Be2 Ne7 10.0–0) 7...a5 (7...Bd6 8.c5 Bc7 9.Be2 Nd7 10.Nc3) 8.b5 cb5 (8...Ne7 9.Nc3+= cb5 10.c5) 9.cd5 Qd5 (9...ed5!? 10.Bb5 Nc6+=) 10.Nc3+/– Qd8 11.Bb5 Nc6 (11...Kf7 12.e4 Bg4 13.Ng5 fg5 14.Qg4+–) 12.e4 Bg4 13.d5 Bf3? (13...ed5 14.ed5 Qe7 15.Qe2 Bf3 16.gf3 Qe2 17.Ke2 Rc8+–) 14.Qf3 (14.gf3?! Rc8+–; 14.dc6?! Bd1 15.c7 Qd7 16.Rd1 Qc6 17.Bc6 bc6+=) 14...ed5 (14...Rc8 15.0–0+–) 15.ed5 (15.Nd5?! Bd6+–) 15...Qe7 16.Ne2 Kf7 17.dc6 bc6 18.Bc6 Rb8 19.Bd4 Bg7 20.0–0 Nh6 21.Bd5 Kf8 22.Rac1 Ke8 23.Bc5 Qe5 24.Bc6 Kf7 25.Rfe1 Qf5 26.Bd5 Ke8 27.Nd4 Kd8 1–0. urko – philstar99, ChessWorld.net, 2009.

5.Nd4 Qb6?? 6.Nf5+– g6 7.Nd4 Qb4 (7...e5 8.Ne6 Bb4 9.c4+–) 8.Ba3 Qa5 9.c3 Nd7 10.Ne6 c5 (10...Kf7 11.Qg4+–) 11.Nf8 (better is 11.Qb3 Bh6+–) 11...Nf8 12.Be2 c4 13.0–0 0–0–0 14.Bb4 Qb6 15.Be7 (better is 15.d3 cd3 16.Qd3+–) 15...Ne7+= 16.Na3 f5 17.Rb1 Qc5 18.Nc2 b5? (better is 18...Nd7+=) 19.Nd4+– Nc6 20.Nc6?? Qc6+/– 21.Ra1 Ne6 22.Bf3 Ng5 23.h3 Nf3 24.Qf3 h5 25.Rfe1 Rde8 26.Qe2 f4 27.Qd1 Rhf8 28.ef4 Re1 29.Qe1 Re8 30.Qd1 Re4 31.g3 h4 32.Qg4 Kb7 33.Qh4 Re2 34.Rd1 Qc5 35.g4 b4 36.Qh7 Ka6 37.Qh4 bc3 38.dc3+– Ra2 39.Qf6 Kb5 40.Qd4?? Qd4–/+ 41.Rd4 Kc5 42.Rd1 a5 43.f5= gf5 44.gf5 Rc2+= 45.f6 Rc3 46.Kg2 Rb3 47.Ra1 c3 48.f7 Rb8–/+ 49.Re1? Rf8–+ 50.Rc1 d4 51.Kf1 Rf7 52.Ke2 Kc4 (52...Kc4 53.Rd1 d3 54.Rd3 Rf2 55.Ke3 Rf3 56.Kf3 Kd3–+) 0–1. Valpa – Milosforman, playchess.de, 2006.

5.Nd4 Bc8 6.f4 Qd6 7.Bd3 e5 (7...Qb4 8.Ba3 Qb6 9.Qh5 Kd8 10.Bf5 Bf5 11.Qf5=) 8.Qh5 Kd8 9.fe5 fe5 (9...Qb4?? 10.Ba3 Qb6 11.Bf8+–) 10.Nf3 e4 11.Ng5 Qg6? (11...Nh6 12.Be4 de4 13.Qh6 Qh6 14.Nf7 Ke8 15.Nh6 A) 15...Bb4? 16.Bg7 Rf8 17.a3+– (17.Bf8?! Bf8 18.Nc3 Bh6+=); B) 15...a5 16.ba5 Ra5+–) 12.Nf7+– Ke7? (better 12...Ke8 13.Qg6 hg6 14.Nh8 ed3 15.Ng6 dc2+–) 13.Qg6 hg6 14.Nh8 ed3 15.Ng6 Kf7 16.Nf8 Kf8 17.0–0 Ke7 (17...Nf6 18.Bf6 gf6 19.Rf6 Kg7 20.Rf4 dc2 21.Na3+–) 18.Bg7 dc2 19.Bf8 Ke8 20.Na3 Be6 21.Nc2 Nd7 22.Bd6 Ndf6 23.Nd4 Bd7 (23...Kd7 24.Be5 Ke7 25.Rac1+–) 24.Rf3 (better 24.Rf4 a5+–) 24...b6 (24...a5+–) 25.Raf1 c5 (25...Bg4 26.Rf6 Nf6 27.Rf6+–) 26.Rf6 Nf6 27.Rf6 (27.Rf6 Kd8 28.bc5 bc5 29.Bc5+–) 1–0. GuestKSRB – receficebrumbrum, freechess.org, 2019.

5.Nd4 Bc8 6.f4 Nh6 =.

5.Nd4 Bg6 6.Ne6 Qb6? 7.a3 (7.Nc3 Kf7 8.Na4 Qb4 9.Nd8 Ke8+–) 7...Kf7+– 8.Nf8 Kf8 9.Be2 (9.c4 e6+–) 9...e5 (9...Nd7 10.0–0+–) 10.d4 (10.0–0 Ne7+–) 10...e4 (10...Nd7!?+–) 11.c4+– Bf7 12.Nc3 Qd8 (12...Ne7 13.0–0+–) 13.cd5 cd5 14.0–0 Ne7 15.f3 f5?? (better 15...ef3 16.Bf3 Kg8+–) 16.fe4 de4 (16...g6 17.ef5 gf5 18.e4 de4 19.d5+–) 17.d5! g6 (17...Nd5 18.Rf5 Deflection; 17...Bd5 18.Bc4 Decoy) 18.d6 Nec6 (18...Rg8 19.de7 Qe7 20.Nd5 Bd5 21.Qd5+–) 19.Ne4! fe4 (19...Qe8 20.Rf4 Ne5+–) 20.Bc4 Rg8 21.Qd5 (21.Qd5 Qe7 22.de7 Ke8 23.Qf7 Kd7 24.e8Q Kd6 25.Rf6) 1–0. DEFFM – GuestVHCN, freechess.org, 2019.

5.Nd4 Bg6 6.Ne6 Qd6!? 7.Nf4 Bf7+=.

5.Nd4 Bg6 6.Ne6 Qd6 7.Nf8 Kf8 8.a3 e5 9.Be2 Ne7 10.0–0 Nd7 11.d3 h5 (11...a5 12.Nd2=) 12.Nd2 h4 13.c4 (13.h3 a5+=) 13...Bf7 (13...h3!? 14.g3 Rh6=) 14.c5 Qc7 15.h3 g5 16.Bg4 f5 (16...Kg7 17.Bc3+–) 17.Be2 Be6 18.f4! g4 (18...ef4 19.Bh8 Pinning (19.Bh8 Deflection); 18...gf4 19.ef4 Combination) 19.hg4 fg4?? (19...h3 20.Nf3 fg4+–) 20.fe5 Ke8 21.Bg4 Bg4 22.Qg4 Ne5 (22...Rg8 23.Qh5 Kd8 24.Nf3+–) 23.Qe6 Nd3 (23...N5g6 24.Bh8 Nh8+–) 24.Bh8 (24.Bh8 Qc8 25.Qh6+–) 1–0. GuestRJVX – receficebrumbrum, freechess.org, 2019.

5.Nd4 Bg6 6.Ne6+= Qd6 7.Nf8 Kf8 8.a3 e5 (8...Kf7 9.Nc3+=) 9.Be2 Ne7 10.0–0 Nd7 (10...Ke8 11.Nc3+=) 11.d4 (11.f4 Ke8+=) 11...e4 (11...Kf7 12.c4+=) 12.c4 Kf7 (12...dc4 13.Bc4 Bf7 14.Be2+=) 13.Nd2 Rhf8 14.b5 (14.Qc2 Kg8+=) 14...Kg8 (14...cb5 15.cb5 Rac8 16.a4+=) 15.a4 (15.c5 Qe6+=) 15...f5 (15...Rac8 16.Ba3 Qe6 17.Rc1+=) 16.Ba3 Qe6 17.a5 Rf7 18.a6 ba6 (18...Rb8 19.ab7 cb5 20.Be7 Re7 21.cd5 Qd5 22.Ra7+–) 19.bc6 Nc6 (19...Qc6!? 20.Be7 Re7 21.cd5 Qf6+–) 20.cd5+– Qd5 21.Bc4 (worse 21.Ba6 Nb6+–) 21...Qa5 22.Bf7 (22.Qc2 Rc8+–) 22...Bf7+– 23.Qc2 (23.Bd6 Qd5 24.Bf4 Nb4+–) 23...Rc8 24.Rfc1 Ndb8?? (better 24...Qb5+–) 25.Bd6+– Rd8 (25...Qd8 26.Bb8 Be6+–) 26.Ra5 (26.Ra5 Rd6 27.Rf5+–) 1–0. DEFFM – receficebrumbrum, freechess.org, 2018.

5.Be2 Qb6 6.a3 a5 (6...e5 7.0–0=) 7.Nd4 (7.b5=) 7...Be4 (7...Bd7 8.Nb3=) 8.0–0 (8.f3 Bg6 9.Ne6 ab4 10.Nf8 Kf8+=) 8...ab4+= 9.Ne6 ba3 10.Ba3 Nd7 (10...Ra5 11.Nc3 Bf5 12.Bg4 (12.Nf8?! Kf8 13.Bg4 Bg4 14.Qg4 Kf7=) 12...Be6 13.Be6+=) 11.Bc5! (worse is 11.Nf8 Nf8 (11...Kf8? 12.Be7 Ke7 13.Ra8+–) 12.d3 Bf5=) 11...Nc5?? (11...Qc5 12.Ra8) 12.Ra8+– Kf7 13.Nd8 (13.Rf8?! Ke6 14.Bg4 Kd6+–) 13...Kg6 (13...Ke8 14.Nb7 Kd7 15.Nc5 Qc5+–) 14.Bh5 Kh6 (14...Kf5 15.Qg4 Ke5 16.Nf7) 15.Nf7 1–0. b4_player – opponent, gamecolony.com, 2007.

5.Be2 e5 6.a3 =.

5.Be2 e5 6.Nh4 Qd7 (6...Be6!?=+) 7.Bh5 g6 8.Nf5 Qf5 9.Bg4 Qg5 10.0–0 f5 (10...Qh4 11.f4 f5 12.Be5+/–) 11.Be2 (11.Be5 Nf6 12.Be2 Nbd7+–) 11...Ne7? 12.Be5+– Rg8 13.f4 Qh6 14.Bf6 Nd7+/– 15.Bg5 Qg7 16.c4?? Qa1–+ 17.Nc3? Qd1 18.Bd1 dc4 19.Be2 h6 20.Bh4 g5 21.Bg3 g4 22.Bc4 Nd5 23.Nd5 cd5 24.Bd5 Rg6 25.a3 Rb8 26.e4 fe4 27.Be4 Rd6 28.Bf5? Rd2 29.Bg4 Rd8?? 30.Re1?? Kf7–+ 31.Bh5 Kg8 32.f5 Nf6 33.Bg6 Rd1 34.h3 Re1 35.Be1 Rd1 36.Kf2 Ne4 37.Ke2 Ra1 38.Bh4 Ra3 39.g4 a5 40.ba5 Ra5 41.Bd8 Ra2 42.Kd3 b5 43.Ke4–/+ b4 44.Bf6? b3–+ 45.Bc3 Bg7 46.Bg7?? Kg7 47.Kd5 b2 48.h4 1–0. OPA – Falcon8, Live Game Caissa's Web, 2004.

5.Nh4 Bd7?? 6.Qh5+– g6 7.Ng6! Bg4 (7...hg6 8.Qg6 A classical mating theme) 8.Qh4 hg6 9.Qh8 (9.Qg4?! g5+–) 9...Nh6 10.Bd3 Bf5 11.Bf5 Nf5 (11...gf5 12.Nc3+–) 12.Qh7 Nd6 13.Qg6 Nf7 14.0–0 (14.e4 e5 15.a3 Nd7+–) 14...Nd7 15.f4 e6 16.b5 (16.a3 a5+–) 16...Qe7 (16...cb5 17.Bd4+–) 17.bc6 bc6 18.Ba3 c5 19.d4 (19.Nc3 Qd6+–) 19...Qd8 (19...Qd6 20.dc5 Qc6 21.c4+–) 20.e4 cd4 21.ed5 Ba3 (21...Qb6+–) 22.de6 Qe7 23.Na3 Qe6 (23...Nf8 24.ef7 Kd8 25.Qh5+–) 24.Rfe1 (better 24.Rae1 Nf8 25.Re6 Ne6 26.Qg8 Ke7 27.Qa8 f5+–) 24...Nde5 25.Re5! (25.Re5 Qe5 26.fe5+–) 1–0. GuestMCZH – GuestJGJM, freechess.org, 2020.

5.Nh4 Be6 A) 6.a3 A1) 6...Bf7 7.f4 (7.Be2 e5 8.0–0 Nh6 9.Nc3 Bd6 10.Nf3; 7.d4 e6 8.Bd3 a5 9.b5 Bd6 10.Nd2) 7...e5 8.fe5 fe5 9.Nf3 e4 10.Ne5; A2) 6...Nd7 7.Be2 (7.f4 Bf7 8.Be2 e5 9.0–0 Nh6 10.Nf3; 7.Nc3 Bf7 8.Be2 e5 9.0–0 Nh6 10.Bh5) 7...Bf7 8.f4 Nh6 9.Nf3 e6 10.0–0; A3) 6...a5 7.b5 (7.Be2 ab4 8.ab4 Ra1 9.Ba1 Bc8 10.f4; 7.Bd3 ab4 8.ab4 Ra1 9.Ba1 Bf7 10.b5) 7...Bf7 8.Be2 e5 9.0–0 Nh6 10.f4; A4) 6...Nh6 7.Be2 Bf7 8.f4 e6 9.0–0 Bd6 10.Nc3; B) 6.d4 Bf7 (6...Qb6 7.a3 a5 8.b5 Nh6 9.Nf3 Nf7 10.Nc3) 7.a3 (7.Be2 e5 8.a3 e4 9.f3 ef3 10.Nf3) 7...e6 8.Bd3 a5 9.b5 Bd6 10.Nd2; C) 6.f4 Bf7 7.a3 (7.Be2 e5 8.a3 ef4 9.ef4 Qb6 10.Nf5) 7...e5 8.fe5 fe5 9.Nf3 e4 10.Ne5.

5.Nh4 Bg6 6.Ng6+= hg6 7.f4 (7.Qg4 g5 8.Bd3 Qd7 9.Bf5 Qd6 10.b5) 7...Nd7 (7...e6 8.Qg4 Bb4 9.Qg6 Kf8 10.a3+= (10.Nc3+=)) 8.Qg4+/– Kf7 (8...g5 9.fg5 e5 10.c4) 9.Bd3 f5 10.Bf5?? (better is 10.Qg3+=) 10...gf5–/+ 11.Qf5 Ngf6 12.g4? (better is 12.a3!?–/+) 12...e6–+ 13.Qd3 (13.Bf6 Nf6 14.Qg5 Bb4–+) 13...Bb4 (better is 13...Ng4!? 14.Rg1 Qh4 15.Rg3–+) 14.g5 Ne4 (14...Nh5 15.Rf1–+) 15.Nc3? (better is 15.Bg7!? Rh3 16.Bd4–/+) 15...Nc3 (15...Bc3 16.Bc3 e5 17.Bb2–+) 16.dc3 (16.Bc3 Bc3 17.Qc3 e5–+) 16...Ba5 17.0–0–0 Nc5 18.Qe2 (18.Qd4 Bb6 19.Qd2 Rh3–+) 18...Na4 19.Qd3 Qb6 20.g6 Ke7 21.Ba3 c5 22.Qd4 Qb2! 23.Bb2 cd4 24.cd4 Nb2 25.Kb2 Rac8 26.h4 Rc3 27.Rd3 Rd3 28.cd3 Bd2 29.Rh3 Kf6 30.h5? Kf5 31.Kc2 Kg4 32.Rh1 Rh5 33.Rg1 Kf3–+ 34.Kd2 Rh2 35.Kc3 Ra2 36.Re1 Ra3 37.Kd2–/+ Kg4 38.Rb1 b6–/+ 39.Rg1 Kf5 40.Rg5+= Kf6 41.e4 de4 42.de4 Rf3 43.e5 Ke7 44.Rg4 a5 45.Kc2 b5–/+ 46.Kb2 a4 47.Kc2 b4–+ 48.Rh4? a3 49.Kd2 b3 50.Ke2 a2 51.Kf3 a1Q 52.Rh7 b2 53.Rg7 Kf8 54.Rf7 Kg8 55.Rf6 Qd1 56.Kg3 b1Q 57.Re6 Qbd3 58.Kh4 Qe1 59.Kg5 Qeg3 60.Kf6 Qgg6 61.Ke7 Qa3 62.Kd7 Qf7 0–1. jammboy – TeaCzar, ChessWorld.net, 2009.

5.Nh4 Nh6 6.Nf5 Nf5 7.Bd3= (7.Qg4 Nh6 8.Qf3 e5 9.a3 e4 10.Qh5) 7...e6 8.Qg4 Qd7 9.0–0 Nh6 10.Qh5.

4.Nf3 Nf6

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

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

4.Nf3 Bg4

5.a3 e5 6.Be5 Nd7 7.Bb2 Ngf6 8.h3 Be6 9.Nd4 a5 10.b5 c5 11.Ne6 fe6 12.g4 Kf7 13.g5 Ne4 14.h4 a4 15.c4 e5 16.Bg2 Ke6 17.cd5 Kd6 18.Be4 c4 19.Qc2 Nc5 20.Qc4 Rc8 21.Bf5 Rc7 (21...e4 22.0–0 h6+–) 22.Be5! Ke5 23.Qf4 (23.Qf4 Kd5 24.Nc3) 1–0. marekt – cornelious, ChessWorld.net, 2004.

5.a3 Ngf6 6.Be2 Bf3 7.Bf3 e6 8.d3 Bd6 9.c4 0–0 10.Nd2 Be5 11.d4 Bc7 12.Qb3 b5 13.cb5 cb5 14.Qd3 Rb8 15.Nb3 Nb6 16.Nc5 (16.Qb5? Nc4 17.Qa6 Nb2–+) 16...Nc4 17.Bc3 Re8 18.0–0 Qd6 19.g3 h5 20.e4 de4 21.Ne4 Ne4 22.Qe4 g6 23.Rfd1 Qe7 24.a4 Nd6 25.Qd3 ba4 26.Ra4 Bb6 27.Bc6 Red8 28.b5 Nf5 29.Qf3 White prepares the advance d5 29...Rbc8 30.d5 ed5 31.Re1 Qc5 32.Bf6 Rd6 33.Bg5?? (33.Be5 Qc2 34.Rf4 Rdd8=) 33...Rdc6?? (better is 33...Qc2 34.Rb4 Nd4 35.Rd4 Bd4–+) 34.bc6= Rc6 35.Ra2 Re6 36.Rc1 Qb5 37.Rc8 Kh7 38.Rc1? (38.Ra1 a5+=) 38...Kg7?? (better is 38...f6 39.Bf4 Nd4–+) 39.Kg2 d4 40.Bf4 d3 41.Bd2 (41.Rd2!? Re2 42.Qd3 Qd3 43.Rd3 Rf2 44.Kh3=) 41...Rf6+= 42.Bc3 Bd4 43.Qe4 (43.Rb2 d2 44.Rd2 Nh4 45.gh4 Rf3 46.Bd4 Rf6+=) 43...Bc3 44.Rc3 Qb1?? (better is 44...Ne3! 45.Qe3 Qd5 46.Kg1 Qa2 47.Rd3 a5–/+) 45.Rd2+= h4 46.Qd3 Qb7 47.Qd5 Qb1 (47...Qb8 48.g4 Ne7 49.Qd4 Qa8 50.Kh3+–) 48.Rd1 (better is 48.g4!? Ne7 49.Qe5 Qb7 50.Kh3+–) 48...Qb2+= 49.Qd2 Qb7 50.f3 Rd6 (50...hg3!? 51.hg3 a5+=) 51.Rd3+/– Rd3 52.Qd3 hg3 53.hg3 Qb2 54.Rd2 Qb8 55.Qc3 Kh7 56.f4 Qb7 57.Qf3 Qb6 58.Kh2 Qe6 59.Qd5 Qf6 60.Qe5 Qb6 61.Qd5 Qf6 62.Qc5 a6 63.Qf8 (63.Qc4 Ne3 64.Qd3 Qe6+=) 63...Ne3 64.Qd6 Qa1 65.Re2 ½–½. Chandler,P (2170) – Tierling,D (2000), XVIII Rhein–Main–Open, 2015. (=1.Nf3 d5 2.b4 c6 3.e3 Bg4 4.Bb2 Nd7)

5.c4 e6 6.a3 Ngf6 7.h3 Bf3 8.Qf3 a5 9.b5 Bd6 10.cd5 (10.d4 e5=) 10...ed5 (10...cd5 11.Nc3=+) 11.Nc3 Qe7 12.d4 Ne4 13.Ne4 de4 14.Qd1 0–0 15.Be2 (15.bc6 bc6 16.Be2 Rab8=) 15...Nf6 (15...Qg5!? 16.0–0 cb5=) 16.0–0 Nd5 17.Bc4 (17.bc6 bc6 18.Qc2 Rfc8+=) 17...Rfe8 18.bc6 bc6 19.Qa4 Nb6 (19...Qf6 20.Rab1= (20.Qc6?? Bh2 21.Kh2 Qc6–+)) 20.Qc2 (20.Qc6 Nc4 21.Qc4 Rab8=) 20...Rab8 (20...Nc4 21.Qc4 Qb7 22.Rfc1 Qb2 23.Rcb1=) 21.Ba2 Nd7 (21...Nd5 22.Bc1+=) 22.Rfb1 Rec8 (22...c5 23.Qa4+=) 23.Bc3 Bc7 24.a4 Nf6 (24...g6 25.Rb8 Rb8 26.Rc1+–) 25.Rb8 Rb8 26.Rb1 (26.Be1!? Qd6 27.g3+–) 26...Rb1+= 27.Qb1 h5 (27...Qa3 28.Qc2+=) 28.Be1 g5 29.Kf1 Kg7 (29...Qa3 30.Qc2+–) 30.Qb7 Qd6 31.Qc8 (31.Qa7 Kg6+–) 31...Kg6 (31...Qd7 32.Qa6+–) 32.g4 hg4 33.hg4 Qd7 34.Qd7 Nd7 35.Bb1 (35.Ke2!?+–) 35...f5+= 36.f3 Nf6 (36...ef3 37.Bf5 Double attack (37.Bf5 Pinning; 37.Bf5 Deflection)) 37.gf5 Kf5 38.Kg2 g4 39.fe4 Ne4 40.Bd3 Bd8 41.Kf1 Bb6 42.Ke2 c5 (42...Bc7!?+=) 43.dc5+– Bc5 44.Bg3 (better 44.Ba5!? Ke5 45.Be1+–) 44...Bb4 45.Bc7 Bc3 46.Bb1 Bb4 47.Bc2 Bc3 48.Bd3 Bb4 49.Kd1 Bc3 50.Kc2 Be5 51.Ba5 g3 52.Be1 g2 53.Bf2 Bh2 54.a5 g1R ½–½. Kasparov,Sergey – Solomon,Stephen J, Australian Open, 2017. (=1.Nf3 d5 2.b4 c6 3.e3 Bg4 4.Bb2 Nd7)

5.c4 Bf3 6.gf3 e6 7.Rg1 Nf6 (7...Bb4?? 8.Bg7 (8.Rg7?! Nf6+=) 8...Nf6 9.Bh8+–) 8.f4 Nbd7 9.b5 Qb6 10.bc6 Qb2 11.cd7 Nd7 12.Nc3 dc4 13.Rb1 Qa3 14.Rb7 Nb6?? (better is 14...Nc5 15.Rc7 Nd3 16.Bd3 cd3+=) 15.Nb5+– Qc5 16.Nc7 Kd8 17.Na8 Qc6 (17...Qc8 18.Rb6 ab6 19.Nb6+–) 18.Bg2 Qa4 (18...Qb5 19.Nb6 ab6 20.Rf7+–) 19.Qh5 g6 (19...Qb4 20.Qf7 Qb1 21.Ke2 Qd3 22.Kf3 Nd7+–) 20.Qg5 Be7 (20...f6 21.Qf6 Kc8 22.Qe6 Kd8 23.Rb8 Nc8 24.Rc8) 21.Qe7 Kc8 22.Qc7 1–0. michaelbuss – Cowhand, ChessWorld.net, 2008.

5.Be2 Bf3 6.Bf3 Qb6 7.a3 Nd7 8.0–0 e5 9.c4 (9.Be2 Bd6=) 9...dc4 10.Qe2 (10.Be2 a5=) 10...Qb5 (10...a5 11.Nc3 ab4 12.ab4=) 11.Nc3= Qa6 12.Rfd1 Ngf6 13.d3 cd3 14.Rd3 0–0–0 15.Rad1 Qb6? (better is 15...Be7!?+=) 16.Ne4+– Ne4 17.Be4 Be7? (better is 17...g6 18.Be5! Ne5 19.Rd8 Qd8 20.Rd8 Kd8 21.Qd2 Kc7+–) 18.Bf5 Qc7 (18...Bf6+–) 19.Rd7 Rd7 20.Rd7 Qd7 21.Bd7 Kd7 22.f3 (better is 22.Qg4 Kc7 23.Be5 Bd6 24.Qg7 Rd8+–) 22...f6 (22...Bd6 23.f4! h5 24.Qc4+–) 23.Kf2 (23.f4 Rd8 24.fe5 fe5+–) 23...b5 (23...Bd6 24.Qd3+–) 24.g4 (24.f4 ef4 25.Qg4 Kc7 26.Qg7 fe3 27.Ke3 Re8+–) 24...g5 (24...Kc7 25.Qc2+–) 25.f4! ef4 (25...ef4 26.ef4 Combination; 25...gf4 26.ef4 Combination) 26.ef4 gf4 27.Qf3 (better is 27.Qe4 Rd8+–) 27...c5 (27...a5 28.Qf4 ab4 29.ab4+–) 28.Qf4 Bd6 29.Qf6 Rf8= 30.Qf8 Bf8 31.bc5 Bc5 32.Kf3 a5 33.g5 a4 34.h4 b4 35.h5 ba3 36.Ba1 Ke8 37.g6 h6 38.Ke4 Kf8 39.Kf5 Kg8= 40.Ke4 a2 0–1. mr (2260) – xina (2040), net–chess.com, 2009.

4.Nf3 h6

5.a3 Nf6 =.

5.c4 a6 6.Qb3 b5 7.c5 a5 8.a3 a4 9.Qd1 Nd7 10.d3 (10.Nd4 Bb1 11.Rb1 Qc7+=) 10...Qc7= 11.Nbd2 Ngf6 12.Qc2 e5 13.e4 (13.Qc3 e4 14.Nd4 Bg6+=) 13...Be6= 14.ed5 Nd5 (14...Bd5!? 15.Be2 0–0–0+=) 15.d4+= ed4 16.Bd4 0–0–0 17.0–0–0 N5f6 18.Bd3 g6 19.Rhe1 Rg8 20.g3 Ng4 (20...Bg7 21.Qb2 Bh8 22.h4+=) 21.h3+/– Ngf6 22.Ne5 Bg7 (22...Ne5!? 23.Be5 Qe7+=) 23.Ng6!+/– Rge8 (23...fg6 24.Re6) 24.Nf4+– Bd5?? (better is 24...Kb8+–) 25.Nd5 cd5 26.Bb5 Re1 27.Re1 (27.Re1 Re8 28.Re8 Ne8 29.Nf3 Bd4 30.Nd4+–) 1–0. Lothal,Guenter (1870) – Huelle,Gunter, Leipzig VfB op, 2003.

5.c4 dc4 6.Bc4 e6 7.0–0 Nd7 (7...Nf6 8.Bc3=) 8.d3 (8.a3 Nb6 9.Be2 Nf6+=) 8...Ngf6 (8...Nb6 9.Qb3=) 9.e4 (9.a3 Nb6=) 9...Bg4= 10.h3 (10.b5 Nb6 11.Qe2 Bc5=) 10...Bh5 (10...Bf3 11.Qf3 Bb4 12.Rd1=+) 11.g4 (11.b5 cb5 12.Bb5 a6 13.Bd7 Qd7= (< 13...Kd7 14.g4+/–)) 11...Bg6 12.Nh4 (12.Qd2!?=) 12...Bh7–/+ (12...Bb4 13.Ng6 fg6 14.Qb3=) 13.Nd2 Ne4! 14.de4 Qh4 15.Kg2 Nb6 16.Bb3 f6?? 17.Qe2=+ Bb4?? 18.Nf3+– Be4 19.Qe4 f5 20.Qe6 Qe7 21.Qg6 Kd8 22.Rad1 (22...Nd5 23.Bd5+–) 1–0. rustic – LLLAMAH, Live Game Caissa's Web, 2005.

5.c4 e6 6.b5 Nf6 7.a4 Be7 8.Nd4 Be4 9.d3 Bg6 10.Be2 c5 11.Nf3 0–0 (11...dc4 12.dc4 Qd1 13.Bd1=) 12.0–0 b6 13.Ne5 Bh7 14.Nd2 Bd6 15.Ndf3 Qc7 16.h3 (16.a5 a6 17.ab6 Qb6+=) 16...Nbd7 17.Nc6 (17.Nd7 Nd7 18.cd5 ed5+=) 17...Nb8 (17...dc4 18.a5=+) 18.cd5 (18.Nb8 Rfb8 19.Bf6 gf6 20.cd5 ed5+=) 18...ed5 (18...Nd5 19.Nce5=) 19.Nce5 (19.Nb8 Rfb8 20.Bf6 gf6+=) 19...Nfd7 (19...Re8 20.d4=) 20.Nd7+= Nd7 21.Rc1 (21.Qb3 Qb7+=) 21...Ne5 (21...a6!?=) 22.Ne5 Be5 23.d4 Bf6 (23...Bh2 24.Kh1 c4+=) 24.Bf3 (better 24.Ba3+–) 24...Qd6?? (better 24...Rfd8=) 25.dc5+– bc5 26.Bf6 gf6 27.Bd5 Kg7 (27...Rad8 28.Qg4 Kh8+–) 28.Qg4 (28.Ba8!? Qd1 29.Rfd1 Ra8 30.Rc5 Be4+–) 28...Bg6 29.Ba8 Ra8 30.Rfd1 Qc7 (30...Qe5 31.Qc4+–) 31.Rd7 Qe5 32.h4 (32.Qc4 a6+–) 32...h5 (32...a6 33.b6 Qb2 34.Rc5 Qb6 35.h5+–) 33.Qc4 Qe6 (33...a6+–) 34.Qe6 (34.Qe6 Rd8 35.Ra7+–) 1–0. GuestVPPL – asdferwer, freechess.org, 2017.

5.c4 e6 6.cd5 ed5 7.a3 Nf6 =.

5.c4 e6 6.Be2 Nf6 (6...dc4 7.Bc4 Nf6 8.b5=) 7.b5 (7.cd5 Bb4 8.de6 Be6=) 7...dc4 8.Bc4 Bd6 (8...a6 9.a4+=) 9.0–0 (9.Nd4 Bg6=) 9...0–0 10.Nc3 (10.Nd4 Bg6=) 10...cb5 (10...a6 11.a4=) 11.Nb5+= Be7 12.d4 (12.Nbd4 Bg4=) 12...Nc6 13.Nh4 (13.Rc1 Rc8=) 13...Bh7 14.f4 (14.Nf3 a6 15.Nc3 Rc8=) 14...Ne4 (better is 14...Nb4!? 15.f5 Nfd5–+) 15.Nf3+= a6 16.Nc3 Rc8 (16...Nb4 17.Ne4 Be4 18.Nd2+=) 17.Ne4 (17.Bd3 Nc3 18.Bh7 Kh7 19.Bc3 b5=) 17...Be4+= 18.Rc1 Qb6 (18...b5 19.Bd3 Bd3 20.Qd3+=) 19.Qb3 (19.Rf2!?=) 19...Qb3+= 20.Bb3 Na5 21.Nd2 (21.Rc8 Rc8 22.Nd2 Bd3+=) 21...Bd3 (21...Nb3 22.Nb3 b6 23.a3+=) 22.Rf2 (22.Rfd1 Bb4 23.Rc8 Rc8+=) 22...Rc1–/+ 23.Bc1 Rc8 24.Bb2 Nb3 25.Nb3 b6 26.Rd2 Be4 27.a3 Rc2 28.Rc2+= Bc2 29.Nd2 Bd3 30.Kf2= f5 31.Kf3 a5 32.e4 g6 33.Ke3 Ba6 34.Nf3 Bb7 35.ef5 gf5+= 36.Ne5 Bg2–/+ 37.Nd7 Bd8 38.d5 Bd5–+ 39.Nf6 Kf7 40.Nd5 ed5 41.Be5 Ke6 42.Kd4?! Be7 43.a4 Bd6 44.Bd6 Kd6 45.h3 Ke6 46.h4 h5 47.Kd3 Kd7 48.Kd4 Kd6 49.Kc3 Kc5 (49...Kc5 50.Kd3 Kb4–+) 0–1. Hellerbrand,Jochen – Fuetterer,Robert, Oberpfalz–ch M2, 1997.

5.c4 Nf6 6.a3 =.

5.c4 Nf6 6.c5 =.

5.Be2 Nd7 6.0–0 Qc7 7.d4 (7.Nd4 Bh7 8.f4 e5 9.fe5 Ne5=) 7...e6= 8.a3 Bd6 9.c4 dc4 10.Bc4 Nb6 11.Bb3 (11.Bd3 Bd3 12.Qd3 Rd8=) 11...Bg4 (11...Nf6 12.Nc3=) 12.h3+= Bh5 13.Nc3 Nf6 14.Rc1 Qd7 15.e4 Nh7 (15...Bf4 16.Rc2=) 16.Qd3 a6 (16...Ng5 17.Nd2+=) 17.d5 0–0 (17...Bf4 18.Rc2 cd5 19.Ne2=) 18.Ne2 (18.Qe3 ed5 19.Qd4 Bf3 20.Nd5 Bh2 21.Kh2 Qd6 22.Kg1 Nf6+–) 18...Bf3 19.Qf3 (19.Qc3 e5 20.dc6 Qc6 21.Qf3 Ng5+/–) 19...ed5+= 20.ed5 Nd5 21.Rcd1 (21.Bd5 cd5 22.Rfd1 Rad8=) 21...Rad8+= 22.Rfe1 Nhf6 (22...Rfe8 23.Bd5 cd5 24.Ng3+=) 23.Nd4 Rfe8 (23...Nf4 24.Bc2 N6d5 25.Nf5+=) 24.Re8 (24.Nf5!?+=) 24...Re8+= 25.Nf5 Qe6 (25...Be5 26.Bd5 Bb2 27.Bc4+=) 26.g3 (26.Nd6!? Qd6 27.Bf6 gf6 28.Kh1+=) 26...Be5= 27.Re1 Nd7 28.Qg4 g6 (worse is 28...Bb2 29.Re6 Re6 30.Nh6 Kf8 31.Nf5+/–) 29.Nh6 Kg7 (29...Kf8 30.Qf3 Qf6 31.Qe4= (worse is 31.Bd5 Qf3 32.Bf3 Bb2 33.Re8 Ke8–/+)) 30.Qe6 (30.f4 Kh6 31.Qh4 Kg7 32.Be5 Ne5 33.Re5+=) 30...Re6= (worse is 30...fe6 31.Be5 Kh6 32.f4+=) 31.Bc1 f5 32.Kg2 Re7 (32...Rd6!?=) 33.Bd5+= cd5 34.g4 (34.Bg5 Re6 35.h4 Nf8=) 34...fg4 35.Bg5 (35.Ng4 Kf7=) 35...Re8 (35...gh3!? 36.Kh3 Re8+=) 36.Ng4= Kf7 37.Rd1 Ke6 38.Re1 Kf7 39.Nh6 Kf8 40.Re3 Bf6 41.Re8 Ke8+= 42.Bf6 Nf6 43.Ng4 Nd7 44.Kf3= Ke7 45.Ke3 Ke6 46.Kd4 b5 47.Ne3 Nf6 48.f4 Kd6 49.f5 g5 50.Ng4 Nd7 51.Ne3 Nf6 52.Nd1 Ne4 53.Ne3 Nf2 54.Nd5+= Nh3 55.Nf6 Nf2 56.Ne4 Ne4 57.Ke4 Ke7 58.Ke5 Kf7 59.Kd5 Kf6 60.Ke4 g4 61.Kf4 g3 62.Kg3 Kf5 ½–½. Buczinski,Henryk – Kowalski,Z, Siemianowice Slaskie, 1992.

5.Be2 Nd7 6.0–0 Ngf6 7.c4 e6 8.Nd4 Bg6 9.Qb3 Qc7. DEFFM – GuestHFRP, freechess.org, 2019.

5.Be2 Nd7 6.0–0 Bg4 7.Nc3 (7.c4 Ngf6+=) 7...Bf3 8.Bf3 e5 9.a3 (9.b5 Ngf6+=) 9...Ngf6 10.e4 d4 11.Ne2 c5 (11...Nb6 12.Rb1=) 12.c3+– d3 13.Ng3 c4 14.Nf5 g6 15.Ne3 b5 16.a4 a6 17.Nd5 Nd5 18.ed5 Rb8 19.ab5 ab5 20.Re1 f6 (20...Bg7!? 21.Ra6 Nb6+=) 21.Ra7 (better 21.g3+–) 21...Bd6? (better 21...Ra8 22.Qa1 Ra7 23.Qa7 Qb8+–) 22.Be4 f5 23.Bf5! gf5 24.Qh5 Kf8 25.Qf5 Qf6 26.Qd7 Rd8 (26...Rg8 27.Qc6 Rg7+–) 27.Qb5 Rg8 28.Qc4 Qg5 (28...Qf3 29.g3 Rg4 30.Qc6+–) 29.Qe4 Qg4 30.b5 Qe4 (30...Rg5 31.c4+–) 31.Re4 Rg7 (31...Rg5 32.c4+–) 32.Ra6 Rb7 (32...Ke7 33.Ba3 Ba3 34.Re5 Kf7 35.Ra3+–) 33.Rd6! Rd6 34.Ba3 Rb5 (34...Ke7 35.Re5 Kd7 36.Bd6 Kd6 37.f4 Rb5 38.Re6 Kc7 39.Kf2 Rd5 40.Rh6+–) 35.Bd6 Kf7 36.f4 Rb1 (36...ef4 37.c4 Rb2 38.Bf4+–) 37.Kf2 ef4 38.Rf4 Kg6 39.c4 Rb2 40.Ke3 Rb1 41.c5 Rc1 42.c6 h5 (42...Ra1 43.c7 Kh7 44.c8Q Re1 45.Kd3 h5 46.Rf7 Kh6 47.Bf4 Kg6 48.Qf5) 43.c7 Re1 (43...h4 44.Kd3 Kg5 45.Rc4 Rg1 46.c8Q Rf1 47.Qg8 Kh5 48.Qh7 Kg5 49.Rg4 Kg4 50.Qg6) 44.Kd3 Re8 (44...Kg7 45.c8Q Re2 46.Qf8 Kh7 47.Rf7 Kg6 48.Qg7) 45.Rf8 Rf8 (45...Re2 46.Ke2 h4 47.c8Q Kh6 48.Qe6 Kh5 49.Rg8 h3 50.Qh3) 46.Bf8 (46.Bf8 Kg5 47.c8Q h4 48.Ke4 h3 49.Qh3 Kf6 50.Qf5) 1–0. Janek – tobokin, internet, 2017.

5.Be2 e6 6.a3 =.

4.f4 Nd7

5.Nf3 e6 6.a3 =.

5.Nf3 Ngf6 6.c4 (6.Be2 e6 7.a3 c5=) 6...dc4 (6...e6 7.a3+=) 7.Bc4= e6 8.0–0 (8.a3!?+=) 8...Bb4–/+ 9.Qb3 (9.Nd4 Bg4 10.Qb3 Be7–/+) 9...a5 10.a3 Be7 11.Nd4 Nc5 12.Qd1 (12.Qc3 Bg4–/+) 12...Bd3 13.Bd3 Nd3 14.Bc3 (14.Qb3 Nb2 15.Qb2 Rb8–/+) 14...Qd7 (14...Qd5 15.Qc2 Qc4 16.Nf3–/+) 15.Qe2 (15.Qc2 Nc5–/+) 15...Nc5 16.a4 (16.Rc1 Nd5–/+) 16...0–0 17.d3 (17.Bb2 Nd5–/+) 17...Nd5–+ 18.Bb2 b5 19.Nc3? (better is 19.e4 Nb4 20.ab5 cb5 21.Ra3–+) 19…Nc3 (19...Nc3 20.Bc3 Na4 21.Ra4 ba4–+) 0–1. Grehl,Siegfried – Andersson,Lars H, corr SOK–93–95, 1994.

5.Nf3 Bg4 6.Be2 Bf3 7.Bf3 Ngf6 8.0–0 g6 9.c4 dc4 10.Nc3 Bg7 11.b5 cb5 12.Nb5 Qb6 13.a4 a6 14.Bd4 Qa5 15.Bc3 Qb6 16.Bd4 Nc5 17.Na3 Rb8 18.Nc4 Qb3 19.Bc5 Qc4 20.Rc1 Qd3 21.Be2 Qd7 22.a5 0–0 23.Bb6 Ne4 24.Rc7 Qd2 25.Qd2 Nd2 26.Rd1 Ne4 27.Bf3 Nf6 28.Re7 Rfe8 29.Rdd7 Re7 30.Re7 Ne8 31.Bb7 Nd6 32.Ba6 Kf8 33.Bc5 Ke7 34.Be2 Rb1 35.Kf2 Kd7 36.a6 Ne4 37.Kf3 Nc5 38.a7 Ra1 39.Bb5 Kc7 40.e4 Ra7 41.Bc4 Ra3 42.Kg4 Ne4 43.g3 f5 44.Kh4 Kd6 45.Bg8 h6 46.Bh7 Ke7 47.Bg6 Kf6 48.Bh5 Nf2 49.Be2 Ng4 50.h3 Ne3 51.g4 fg4 52.hg4 Ng2 53.Kh5 Nf4 54.Kh4 Rh3# 0–1. OrangOetan – MicTal, TIO_44 (fics, Oklahoma City, OK USA), 2001.

4.f4 e6

5.a3 Nd7 6.Nf3 Ngf6 7.Be2 a5 8.b5 c5 9.a4 Be7 (9...h6 10.0–0 Bd6 11.Nc3 0–0 12.Bd3 Re8 13.Ne2 Ne4 14.Nc3 Qe7; 9...h5 10.Nh4 Bg4 11.0–0 Bd6 12.Nf3 0–0 13.h3 Bf5 14.d3 Qb6) 10.d3 (10.Nh4 Bg4= 11.0–0 Be2 12.Qe2 0–0 13.Nf3 h6 14.c4 Qc7) 10...0–0 (10...Ng4 11.Qd2 Bf6 12.Nc3 Nb6 13.d4 cd4 14.ed4 Bh4) 11.Na3 (11.0–0!?= h6 12.Qd2 Qb6 13.Nc3 Bd6 14.Nd1 Qc7) 11...Nb6–/+ 12.c4 (12.Nb1–/+ Ng4 13.Qd2 Bf6 14.Nc3 Ne3) 12...dc4 (better is 12...Ng4 13.Bc1 Bf6–+ 14.d4 Rc8) 13.Nc4+= Nc4 14.dc4 Qd1 15.Bd1 Rfd8 16.Ra3 Nd7 (16...Ne4 17.0–0+=) 17.Nd2 Nb6 18.Bc1 (18.Bf3!?+=) 18...Bd3 19.Bb3 Bf6 20.Kf2 Bc3 (20...e5 21.g3–/+) 21.Ra2+= Bd2 22.Rd2 Bc4 23.Bc2 Kf8 24.Rhd1 Rd2 25.Rd2 Ke7 26.Ba3 Rc8 27.e4 f6 28.Rd1 Nd7 29.b6 Rc6–/+ 30.Rb1 Kd8 31.e5 f5 32.g4 g6 33.h4 fg4–+ 34.h5? gh5 35.Rh1 Nb6 36.Rh5–/+ Rc7 37.Bh7 Na4–+ 38.Bc2 Nc3 39.Rh8 Kd7 40.f5 ef5 41.Bf5 Kc6 42.Rh6 Kb5 43.Rd6?? Rf7 44.Rf6 Rf6 45.ef6 Bf7 46.Bg4 Ne4 47.Ke3 Nf6 48.Bf3 b6 49.Bb2 Nd5 50.Bd5 Bd5 51.Kd3 Kb4 52.Be5 a4 53.Kc2 b5 54.Kb2 Kc4 55.Ka3 Bc6 56.Kb2 b4 57.Ka2 a3 58.Bd6 Kb5 59.Be7 Bd5 60.Kb1 b3 (60...b3 61.Bf6 Be4 62.Kc1 b2 63.Bb2 ab2 64.Kb2 Kc4 65.Ka3 Kd3 66.Ka4 c4 67.Kb5 c3 68.Kb6 c2 69.Kc7 c1Q 70.Kd6 Qa1 71.Ke6 Qa6 72.Ke7 Bd5 73.Kd7 Qe6 74.Kc7 Qc6 75.Kd8 Qd6 76.Ke8 Qc7 77.Kf8 Qf7#) 0–1. Hirth,Ulrich (2160) – Bensdorp,Marlies (2300), Open A, Groningen NED, 2008.

5.Nf3 Nf6 6.a3 =.

5.Nf3 h6 6.a3 Nf6 7.c4 a5 8.c5 ab4 9.ab4 Ra1 10.Ba1 b6 11.Bf6 Qf6 12.d4 g5 13.fg5 hg5 14.Bd3 g4 15.Ne5 bc5 16.bc5 Bc5! 17.Bf5 ef5 18.Nc6 Qc6 19.dc5 Qc5 20.Qb3 Nc6 21.0–0 d4–/+ 22.Re1 Qe5 23.g3 0–0 24.Nd2 Re8 25.Nf1 Qe6 26.Qa3 Ne5 27.Nd2 Nf3 28.Nf3 gf3 29.Kf2 Qd5?? 30.Qd3 Ra8 31.Kg1? Ra2 32.Kf1 Rh2 (33.Rc1 Rh1 34.Kf2 Rc1 35.ed4 Qa5–+) 0–1. Wall,Bill – Iceman, Internet, 2005.

5.Nf3 h6 6.a3 Nf6 7.c4 dc4 8.Bc4 b5 9.Be2 =+.

5.Nf3 h6 6.a3 Nf6 7.Be2 c5 8.bc5 Bc5 9.0–0 Nc6 10.d4 Qb6 11.Bc3 Be7 12.Ne5 Rc8 13.a4 0–0 14.Bb5 Ne5 15.fe5 Ne4 16.Be1 a6–+ 17.Bd3 Qb2 18.Nd2? Nc3 (19.Nc4 Nd1 (19...Rc4?! 20.Bc3 Qc3 21.Bc4 Qe3 22.Kh1 dc4 23.Rb1–+) 20.Nb2 Nb2 21.Bf5 ef5 22.Rf5 Bg5–+) 0–1. Wall,Bill – Iceman, Internet, 2005.

4.g4 Be4

5.f3 Bg6 6.a3 Nd7 7.h4 h6 8.h5 Bh7 9.f4 Qc7 10.Nf3 0–0–0 11.Ne5 f6 12.Nf7 Be4 13.Rh3 e5 14.Nh8 ef4 15.Nc3 fe3 16.Ne4 de4 17.Nf7 Re8 18.Re3 Qf4 19.b5 Bc5 20.bc6 bc6 21.Ba6 Kc7 22.Qb1 Be3 23.Be5 Ne5 24.Qb7# 1–0. marus1 – hilmar, internet, 2001.

5.f3 Bg6 6.a3 h6 7.h4 e6 8.h5 Bh7 9.Nc3 Be7 10.Nh3 Bh4 11.Nf2 Bf6 12.Rb1 Ne7 13.e4 de4 14.Nfe4 Be4 15.Ne4 Bb2 16.Rb2 0–0 17.Rb3 Nd5 18.Qa1 Nf4 19.Qe5 Nd5 20.c4 Nd7 21.Qd6 Ne7 22.Bd3 Nc8 23.Qd4 Qe7 24.c5 Rd8 25.Qa1 b6 26.cb6 ab6 27.Qc3 Nb8 28.f4 b5 29.g5 Ra7 30.gh6 gh6 31.Rg1 1–0. marekt – saltydog23, GameColony.com, 2002.

5.Nf3= Nd7 6.a3 (6.Nc3 Bf3 7.Qf3 e6=) 6...e6 (6...h5 7.d3 Bf3 8.Qf3 hg4 9.Qg4=+) 7.h4 (7.d3 Bf3 8.Qf3 a5=) 7...b5 (7...e5 8.Nc3=) 8.Nc3= a5 (8...Bf3 9.Qf3 a5 10.Na2=) 9.Ne4 de4 10.Nd4 Ne7 (10...Rc8 11.Bg2 e5 12.Nf5+=) 11.a4 (11.Bg2 e5 12.Nb3 ab4 13.ab4 Nd5+=) 11...ba4 12.b5 (12.Ra4 ab4 13.Rb4 Nc5=) 12...Qb6 (12...cb5 13.Bb5 e5 14.Ne2=) 13.Ra4 (13.bc6 Nc6 (< 13...Qb2 14.cd7 Kd7 15.Bg2+/–) 14.Rb1 Rb8=) 13...e5 14.Nc6 Nc6 15.bc6 Nc5 (15...Qc6 16.Qa1 Qc2 17.Be5=) 16.Ra2 Bd6 17.Bg2 (17.Qa1 A) < 17...Qc6 18.Be5 (18.Ra5?! 0–0=) 18...Be5 19.Qe5 Kf8 20.Bc4+/–; B) 17...0–0=) 17...Qc6 18.d4 Nd7 (18...Na4 A) 19.de5?? Bb4 20.Kf1 Qc4 21.Qe2 Qa2 22.Qb5 Kf8 23.Be4 Rd8–+ (23...Nb2?! 24.Bd5 Qa4 25.Qa4 Na4 26.Ba8–+; 23...Qb2 24.Ba8 Ke7 25.Qb7 Ke6 26.Qc6 Ke7 27.Qc7 Ke6 28.Bc6+=); B) 19.Qd3 Bb4 20.Kf1 Nb2 21.Be4+/–) 19.0–0 (19.Qd3 Nf6 20.de5 Bb4 (20...ed3?? 21.Bc6 Nd7 22.Ba8 Ne5 23.Be5 Be5 24.cd3+–) 21.c3 Rd8+/– (21...ed3 22.Bc6 Nd7 23.Ba8+–)) 19...0–0 20.Qd3= Qd5 21.c4+= Qe6 22.Qe4 Qc4 23.Qd5 Attacks the isolani on a5 23...Qd5+= 24.Bd5 Ra6 25.Rc1 ed4 26.Bd4 Be5 27.Bb7 Rh6 28.Ra5 Bd4 29.ed4 Rh4 30.f3 h5 31.Rh5 Rh5 32.gh5 Nf6 33.Kf2 Nh5 34.d5 Nf4 35.Rd1 f5 36.d6 Kf7 37.Bc6 Rd8+= ½–½. Schulz,Hans_Juergen – Zulauff,Harri, TT–18.19, 2005.

5.Nf3= e6 6.a3 =.

4.g4 Bg6

5.Nf3 Nd7 6.c4 e6 7.cd5 ed5 8.a4 Ngf6 9.g5 Ne4 10.h4 Bh5 11.Be2 f6 12.gf6 gf6 13.b5 c5 14.Nc3 Bf7 15.Qc2 Nc3 16.Qc3 Qc7 17.d4 c4 18.Rg1 0–0–0 19.Ba3 Ba3 20.Rg7 Bh5 21.Qa3 Bf3 22.Bf3 Qa5 23.Kf1 Rhg8 24.Rg8 Rg8 25.Bd5 Rg4 26.Rc1 Kd8 27.Rc4 Qd2 28.Qb3 Rh4 29.Bb7 1–0. mtr – antoni, Internet, 2001.

5.Nf3 e6 6.a3 Nd7 7.Ne5 Qc7 8.Ng6 hg6 9.h3 Ngf6 10.d4 Ne4 11.Nc3 Nc3 12.Bc3 Nb6 13.Qf3 Na4 14.Bd2 Be7 15.c4 Rc8 16.cd5 cd5 17.Bb5 Kf8 18.Ba4 Qb6 19.0–0 Bd6 20.Rac1 Ke7 21.Rc8 Rc8 22.Rc1 Rh8 23.Bc2 Bb8 24.Bd3 Qd6 25.Qg2 a6 26.f4 Ba7 27.a4 Rg8 28.Kf2 Rf8 29.b5 Qa3 30.ba6 Qd3 31.Bb4 Ke8 32.Rc8 Kd7 33.Rf8 Bd4 34.Rf7 Kc6 35.ed4 Qd4 36.Kg3 ba6 37.Qc2 1–0. wesolyPolak – aling_nene, GameColony.com, 2002.

5.Nf3 e6 6.a3 Nd7 7.h4 h6 8.Ne5 Ne5 9.Be5 Be4 10.f3 Bh7 11.Nc3 Bd6 12.Bg7 Bg3 13.Ke2 Bh4 14.Bh8 Bf6 15.Bf6 Qf6 16.d4 0–0–0 17.Rc1 e5 18.de5 Qe5 19.Qd4 Qd4 20.ed4 Re8 21.Kd2 Bg6 22.Bd3 Bd3 23.Kd3 1–0. themonkey – NN, GameColony.com, 2002.

5.Nf3 h6 6.Ne5 Bh7 7.h4 f6 8.Nf3 e5 9.a3 e4 (9...Bd6 10.c4=+) 10.Nd4= Qd6 11.c4 b6 (11...dc4!? 12.Bc4 Ne7=) 12.cd5+/– cd5 (12...Ne7 13.dc6 Nbc6 14.Bb5+/–) 13.Bb5 (13.Nc3!? a6 14.Qa4 Kd8 15.d3+/–) 13...Nd7+= 14.d3 a6 15.Bc6 Rc8 (15...Ra7!?+=) 16.Bb7+/– Rc7 (16...Rb8!? 17.Ba6 ed3+/–) 17.Ba6+– g5?? (better is 17...Ne5 18.Nb5 Nd3 19.Kd2 Qe7 20.Nc7 Qc7 21.Bd3 ed3+–) 18.Nb5 Qc6 19.Nd2 ed3 (19...Qc2 20.Nc7 Qc7 21.hg5 ed3+–) 20.Rc1 Bc5 21.Nc7 Qc7 22.hg5 Qa7 23.Bb5 Be7 (23...hg5 24.Bd3! Ne5 25.Be5 (25.bc5?! Nd3 26.Kf1 Nb2=) 25...fe5 26.bc5 bc5 27.Bg6 Bg6 28.Rh8+–) 24.gf6 Ngf6 (24...Bb4 25.ab4 Kf7 26.Qb3 Ndf6 27.Be5+–) 25.Rc8 Bd8 26.Bf6 0–0 27.Bd8 Qa3 28.Bd7 Qb4 29.Be6 Kg7 30.Qa1 (30.Rc7 Kh8 31.Rh6 Rf7 32.Qa1 Qb2 33.Bf6 Qf6 34.Qf6 Rf6 35.Rhh7) 30...Kg6 (30...Qb2 31.Qb2 Kg6 32.Rc7 d4 33.Qd4 Rd8 34.Qg7) 31.Bf5 Kf7 (31...Rf5 32.gf5 Kf7 33.Qa7 Kg8 34.Bf6 Qf8 35.Qg7) 32.Qf6 (32.Rc7 Ke8 33.Qe5 Kd8 34.Rc8) 32...Kg8 33.Be6 (33...Rf7 34.Be7) 1–0. fajgo – Daffodil, internet, 2002.

5.h4 h5 6.Nc3 (better is 6.g5!?=) 6...e5 7.b5 Nf6 (better is 7...hg4!? 8.Qg4 Bc2–/+) 8.g5+= Nfd7 9.Nf3 Bd6 10.Na4 0–0 11.c4 cb5 12.Nc3 (12.cb5!? a6 13.Be2–/+) 12...bc4–+ 13.Nd5 b5 14.Bh3? (14.a4 Qa5 15.Nc3+=) 14...Nc6 (14...Nc5 15.0–0 Nd3 16.Rb1–+) 15.d4 cd3 16.Qb3 (16.Rc1 Rc8 17.Nd2–+) 16...Be4 17.Bg2 (17.Qb5 Bf3 18.0–0 Nb6 19.Nb6 Qb6 20.Qd3 Qb4–+) 17...Nc5 18.Qb5 (18.Nf6 gf6 19.Qd1 Qa5 20.Kf1 f5–+) 18...Bd5 19.Be5 (19.Rc1 a6 20.Qc5 Bc5 21.Rc5 d2 22.Kd1 Be4 23.Ne5 Bg2 24.Rc6 Re8–+) 19...Rb8 20.Qc5 (20.Qb8 Bb8 21.Bb8 Qa5 22.Kf1 Rb8–+) 20...Bc5 (20...Be5?! 21.Ne5 Bg2 22.Nc6 d2 23.Ke2–+) 21.Bb8 Qb8 22.Nd2 (22.0–0 Qb4 23.Rfd1–+) 22...Bg2 23.Rg1 Bd5 (23...Qh2 24.Rf1 Bf1 25.Rb1 Be3 26.Ne4 Bh3 27.Nf6 gf6 28.fe3 Qe2) 24.e4 Qb2 25.Rb1 Qc2 (25...Bf2 26.Kf1 Qd2 27.ed5 Bd4 28.Rg2 Qf4 29.Ke1 Bc3 30.Rd2 Re8 31.Kd1 Qd2) 26.ed5 Re8 27.Kf1 Qd2 28.Rg2 Re2 29.dc6 (29.Kg1 Rf2 30.Rf2 Qf2 31.Kh1 Bd6 32.Rb8 Nb8 33.a3 Qf1) 29...Rf2 30.Rf2 0–1. Willi_weizenkeim – Chessnuts, playchess.de, 2002.

4.h3 e6

5.Bd3 Bd3 6.cd3 Nf6 7.a3 Bd6 (7...a5 8.ba5 Nbd7 9.Nf3=+) 8.Nc3 Nbd7 9.Nf3 0–0 10.0–0 Ne5 (10...h6 11.Qb3=+) 11.Ne5= Be5 12.f4 Bc7 13.Na4 Bb6 14.Rf3 a5?? (better 14...Qe7=) 15.Bf6+– gf6 16.Rg3 Kh8 17.Qg4 (17.Qg4 Be3 18.de3+– (18.Re3?! ab4 19.Nc5 Ra3 20.Ra3 ba3+=)) 1–0. Pierre – GuestLengo, internet, 2020.

5.Bd3 Bd3 6.cd3 Nf6 (6...Bb4?? 7.Bg7 Qg5 8.Qg4 Qg4 9.hg4+–) 7.Nf3 (7.a3 Bd6–/+) 7...Bb4 8.Qb3 Qb6 9.Bd4 Bc5 (9...c5!? 10.Bf6 gf6–/+) 10.Bc5=+ Qc5 11.Qb7 0–0 12.Nc3 Qb6 (12...Nbd7!?=+) 13.Rb1= Qb7 14.Rb7 Nbd7 15.Ke2 Rfb8 16.Rhb1 Nb6 17.Rc7 (17.Rb8 Rb8 18.Ne5 Rc8+=) 17...Rc8 18.Rc8 Rc8 19.a4 Rb8 (19...Ne8!?+=) 20.Ne5+– c5 (20...Nbd7 21.Nc6 Rb1 22.Nb1+–) 21.Nc6+– Ra8 22.a5 Nbd7 (22...Nc8 23.Na4+–) 23.Nb5 a6 (better 23...Ne8 24.Nba7 Nd6+–) 24.Nc7 Re8 (24...Rf8 25.Na6 g5 26.Nc7+–) 25.Ne8 (25.Ne8 Ne8 26.Rb7+–; 25.Na6?! Kf8+–) 1–0. Pierre – GuestANons, internet, 2020.

3.e3 f6

4.a4 b6 5.Bd3 Bb7? (better 5...Nh6+=) 6.Qh5+– Kd7 7.Ne2 (7.b5 Qe8 8.bc6 Bc6 9.Qh3 Kd8+–) 7...Na6 (7...e5 8.b5 Ne7 9.bc6 Nbc6 10.Nbc3+–) 8.Nd4+– Nc7 (8...e6 9.Qh3 Nc7 10.Ba3+–) 9.0–0 (9.Nc3 Qe8 10.Qh3 Kd8+–) 9...e6 10.Qg4 (10.Ba3 Nh6 11.Qh3 g6+–) 10...Qe7 (10...Nh6 11.Qh3 Bb4 12.Bc3 Bc3 13.Nc3+= (worse 13.dc3 c5 14.Nb5 a6=+)) 11.Ba3 (11.a5 Nh6 12.Qh3 c5 13.bc5 bc5+–) 11...g6 (11...Qf7 12.c4 Nh6 13.Qh3+–) 12.c4 (12.Nc6 Qg7 13.b5 Bc6 14.bc6 Kc6+–) 12...f5 (12...Nh6 13.Qh3 Qf7 14.c5+–) 13.Qg3 (13.Qh3 Qg7 14.f4 Qh6+–) 13...Qf6 14.f4 (14.Nc3 e5 15.Nc2 Qe6+–) 14...Re8 (14...Be7 15.Nc3 Qh4 16.Qf3+–) 15.Ra2 Nh6 (15...Be7 16.Nf3 Qg7 17.b5+–) 16.Bb2 Bb4 (16...Qe7 17.b5 Bg7 18.bc6 Bc6 19.Nc6 Kc6 20.Nc3+–) 17.Nc6! Qf8 (17...Bc6 18.Bf6 Discovered attack; 17...Kc6 18.cd5 Double attack (18.Bf6 Discovered attack)) 18.cd5 (worse 18.Bh8 Bc6 19.Bd4 Bc5 20.cd5 Nd5 21.Bc5 Qc5+–) 18...Nd5 19.Na7 Rg8 20.Bb5 Ke7 21.Rc1 Rd8 (21...Kf7 22.Nc3 Bc5 23.Be8 Qe8+–) 22.Qg5 Kd6 (22...Kf7 23.Rc7 Be7 24.Rb7 Ng4+–) 23.Be5 1–0. GuestRNBF – GuestBYDT, freechess.org, 2020.

4.a4 Nd7 5.Qh5 (5.Be2 e5 6.b5 Bd6=) 5...g6=+ 6.Qd1 Ne5 (6...e5 7.b5=) 7.Be2 Nc4 (7...Bf5 8.a5=) 8.Bc4 dc4 9.Qe2 Be6 (9...Qd5 10.e4 Qf7 11.Na3+=) 10.Na3 (10.Nf3 a5 11.b5 cb5 12.ab5 Bf7+=) 10...a6 (10...Bf7 11.e4+= (worse 11.Nc4 Qd5 12.d3 Qg2=+)) 11.Nc4 (better 11.Nf3+=) 11...Qd7?? (better 11...Qd5 12.Nb6 Qg2=) 12.Nb6+– Qd8 13.Na8 Qa8 14.b5 ab5 (14...Qc8 15.ba6 ba6 16.Nf3+–) 15.ab5 Qd8 (15...Qc8 16.d4+–) 16.bc6 (16.e4 Bg7+–) 16...bc6 17.Qa6 (17.d4 Qb6 18.Bc3 c5+–) 17...Nh6 (17...Bd5 18.f3+–) 18.Qc6 Bd7 (18...Kf7 19.e4+–) 19.Qd5 e6 (19...Bc8 20.Qd8 Kd8 21.d4+–) 20.Qe4 f5 (20...Be7+–) 21.Qf3 Ng8 1–0. DEFFM – GuestJPHY, freechess.org, 2016.

4.c4 dc4 5.Bc4 g5?? 6.Qh5+– Kd7 7.Nf3 b5 8.Bf7 Nh6 9.Ng5! fg5? (better 9...e5 10.Ne6 Qe7 11.Nf8 Rf8+–) 10.Bh8 Kc7?! (10...e6 11.Qf3+–) 11.Be5 (11.Bb3 e6+–) 11...Kb7 12.Bb3 Nd7 13.Bd4 (13.Qg5 Ne5 14.Qe5 Qd3+–) 13...Nf6? (13...e5 14.Bc3 Nc5 15.f3 (15.bc5?! Bg4 16.Qh6 Bh6+–) 15...Nd3 16.Ke2+–) 14.Qe2 (better 14.Qg5 Nf5 15.Bf6 ef6 16.Qh5+–) 14...Be6 (14...e5 15.Be5 Bb4+–) 15.Be6 c5 (15...Qd6 16.Bb3 Qb4+–) 16.Bc5 (better 16.Qf3 Kc7 17.bc5+–) 16...Qc7 (16...Qe8 17.Nc3 Qc6 18.Qb5 Qb5 19.Nb5 a5+–) 17.Qb5 Qb6 18.Bb6 Kb8 19.Bd8 1–0. GuestNZTQ – GuestBPQX, freechess.org, 2017.

4.c4 Be6 5.cd5 Bd5 6.Nc3 Be6 (6...e5 7.Nd5 cd5 8.Rc1+–) 7.Nf3+– Nd7 8.b5 c5 9.Be2 b6 (9...Nh6 10.0–0+–) 10.d4 Qc7 11.Qc2 g5?? (11...Rd8+–) 12.Qe4 Bf7 (12...g4 13.Qa8 Qd8 14.Qd8 Kd8 15.Nh4+–) 13.Qa8 Nb8 (13...Qd8 14.Qa7 g4 15.dc5 gf3 16.Bf3+–) 14.dc5 g4 (14...bc5 15.Nd5 Bd5 16.Qd5 Qa5 17.Kf1+–) 15.Nd4 Bh6 16.Nc6 f5 17.Nb8 Nf6 18.Nc6 Kd7 19.Rd1 Ke6 20.Bc4 Nd5 21.Nd5 (21.Nd5 Qe5 22.Be5 Kd7 23.Nb6) 1–0. GuestFZMM – birikiucdort, freechess.org, 2019.

4.Bd3 a5 5.Qh5+= g6 (5...Kd7!?+=) 6.Bg6!+– Kd7 (6...hg6 7.Qh8 Pinning (7.Qh8 Deflection)) 7.Bh7 (better 7.Bf5 Kc7 8.ba5+–) 7...Kc7? (better 7...Nh6!? 8.Bg6 ab4+–) 8.Be5!+– Kb6 (8...fe5 9.Qe5 Double attack) 9.ba5 (9.Bd4 Kc7+–) 9...Ka5 10.Bc3 Kb6 11.Bd4 Kc7 12.a4 (12.f4 Qd7 13.Qg6 e5 14.Bg8 ed4 15.ed4 Qf5+–) 12...Na6 (12...Nh6 13.a5 Kd6 14.Bd3 Ra5 15.Ra5 Qa5 16.c4+–) 13.Nc3 Nb4 14.Rb1 (better 14.Be5!? Kb6 15.a5 Ra5 16.Bd4 Ka6 17.Ra4+–) 14...Nc2+– 15.Bc2 Rh5 16.Bb6 Kd7 17.Bd8 Kd8 18.f4 e6 (18...e5 19.g4 Rh4 20.h3+–) 19.Nf3 Bb4?? (better 19...Bd6+–) 20.Rb4+– Rh2 1–0. GuestQMNM – GuestKNBH, freechess.org, 2018.

4.Bd3 e5 5.Qh5 Ke7 (5...Kd7 6.b5=) 6.Bh7 (6.b5 Qe8 7.Ba3 Kd8+=) 6...Be6 (6...Kd6 7.Nf3 Kc7 8.Ne5 fe5 9.Be5 Bd6 10.Qf7 Nd7 11.Bd6 Kd6 12.Qf4 Ke7 13.Qg5 Ngf6 14.Qg7 Ke6 15.Bd3=+) 7.Nf3 (better is 7.b5!?+=) 7...Bf7=+ 8.Qh4 Nh6 (8...Nd7 9.Be5 g5 (9...Ne5 10.Ne5 Be8 11.b5=) 10.Ng5 Ne5 11.Nf7 Nf7–+) 9.Bf5+= g5 10.Qh3 Bg7 11.Nc3 Qd6 12.b5 (12.a3 Kf8=) 12...Nf5?? (better is 12...Qb4 13.Rb1 g4 14.Bg4 Qg4 15.Qg4 Ng4 16.bc6 b6–/+) 13.Qf5+= Qe6 14.Qe6 Be6 15.Ba3 (15.d3 Kf7+=) 15...Kf7 16.bc6 bc6 17.Rb1 Nd7 18.Rb7 g4 19.Ng1 Rhb8 20.Rb8 (20.Rc7!?=) 20...Rb8=+ 21.Nge2 d4?? (better is 21...c5–/+) 22.ed4+/– ed4 (22...a6 23.de5 Ne5 24.Kd1+/–) 23.Nd4 Bd5 (23...f5!? 24.Nc6 Rb6 25.Nd8 Kg8+–) 24.0–0+– Kg6 25.Nd5 cd5 26.Nc6 Rb7 (26...Rb6 27.Na7 Ne5 28.Nc8+–) 27.Ne7 Kg5 (27...Kh7 28.Nd5 f5 29.Ne3+–) 28.Nd5 (28...f5 29.Re1+–) 1–0. Wall,Bill – Kadlit, internet, 2006.

4.Bd3 g6 5.h4 (5.f4 Qd6 6.a3 a5=) 5...Nh6 6.c4 Bf5 (6...e5 7.Qb3=+) 7.Bf5= Nf5 8.h5 g5 9.h6 (better is 9.cd5 cd5 10.a3=) 9...Rg8 (better is 9...Qd7!?=+) 10.Qh5+= Rg6? (better is 10...Kd7 11.Bf6 ef6+/–) 11.Qg6!+– hg6 12.h7 Bg7 13.h8Q Bh8 14.Rh8 Kd7 15.Rd8 Kd8 16.Na3 White intends b5 (16.cd5 cd5 17.Nc3 d4+–) 16...Na6 17.b5 Nc5 18.Bc3 e5 19.cd5 cd5 20.g4 Nd6 21.d4 (21.Ke2!? Rc8+–) 21...Nd3+/– 22.Ke2 e4 23.Rb1 Rc8 24.Bd2 Kd7 25.Nf3 ef3 26.Kd3 Ne4 Do you see the mate threat? 27.Be1 f5 28.b6 a6 29.gf5 gf5 30.Nc2 Rc6 (30...g4 31.Nb4=) 31.a4 (31.a3 g4 32.Nb4 Rb6+=) 31...g4+= 32.Rb2 (better is 32.Nb4 Rb6 33.Kc2=) 32...Rc3+/– 33.Bc3 Deflection from f2 33...Nf2 34.Kd2 g3 35.Ne1 Ne4 36.Kd3 Nf2?? (better is 36...f2 37.Ke2 Nc3 38.Kf1 Na4=+) 37.Kc2+– (37...Ng4 38.Nf3 Ne3 39.Kd3+–) 1–0. Strukov – Agababajev, corr, 1976.

4.Qf3 e5 5.g3 (5.a3!?=+) 5...e4 (better is 5...Bb4 6.Ba3 Ba3 7.Na3 Ne7–+) 6.Qf4?? (better is 6.Qh5 g6 7.Qd1 Bb4 8.f3–/+) 6...Bd6 (better is 6...g5 7.Bf6 Qf6 8.Qf6 Nf6–+) 7.Be5 (7.Qh4–+) 7...Be5 8.Qh4 Ba1 9.f4 (9.d4 h5 10.g4 g5–+) 9...Ne7 10.g4 (10.Qh5 g6 11.Qd1 Qb6–+) 10...Ng6 (10...Qb6 11.a3–+) 11.Qg3 (11.Qh5 0–0–+) 11...Na6 (11...Qb6 12.a3–+) 12.f5 Ne5 13.Qf4 Nb4 14.Na3 Qd6 15.g5 Bd7 16.h4 Bb2 17.c3 Na2 18.d4 Nc4 19.Nc4 Qf4 20.ef4 dc4 21.Bc4 Nc3 22.h5 Bf5 23.gf6 gf6 24.h6 Nd5 25.Rh5 Rg8 26.Rf5 Rg1 27.Kf2 Bd4 28.Ke2 Nc3 29.Kd2 0–0–0 30.Be6 Kb8 31.Kc2 Rg2 32.Kb3 Nb5 33.Bc4 Bg1 34.Rf6 Nd4 35.Kb4 Nc2 36.Kb3 Ne3 37.Rf7 Nc4 38.Kc4 Rc2 39.Kb3–+ Rdd2 40.Rf8 Kc7 41.Rf7 Kb6 42.Rh7 Rb2 43.Kc3 Bd4 44.Kc4 Rbc2 45.Kb3 Be3 46.Rf7 Rc5 47.h7 Rd3 48.Kb2 Bd4 49.Ka2 Rd2 50.Kb3 Rc3 51.Ka4 Ra2 52.Kb4 a5# 0–1. steelnuts – harshrearlm, Caissa.com, 2004.

4.Nf3 e6 5.a3 Bd6 6.c4 Bd7 7.d4 (7.Bd3 e5 8.c5 Bc7+=) 7...dc4 (7...Na6 8.Nc3+/–) 8.Bc4 Ne7 9.Nc3 b5 10.Bd3 0–0 11.Ne4 Bc7 12.Nc5 Qc8 13.Qc2 Na6? (better is 13...f5!?+–) 14.Bh7 Kh8 15.Nd7 Qd7 16.Bd3 Nf5 (16...Qe8 17.0–0+–) 17.Rc1 Nd6 (17...Ne7+–) 18.Qc6 Nc4 (18...Qc8+–) 19.Qd7 Nb2 20.Bb5 Rac8 21.Ba6 Rfd8 22.Qe6 Rd6 23.Qc8 Kh7 24.Rc7 Ra6 (24...Rd4 25.Qf5 Kh6 26.ed4 Nc4 27.g4 g6 28.Qf6 Na3 29.Qg5) 25.Qg4 Nd3 26.Kd2 Ra3 (26...Kh6 27.Qg7 Kh5 28.g4) 27.Qg7 1–0. pierred – anony, internet, 2014.

4.Nf3 Bg4 5.Be2 e5 6.Ne5 (better is 6.a3!?=) 6...Be2–/+ 7.Qe2 fe5 8.Qh5 Kd7 9.Be5 (9.Qf5 Ke7 10.Be5 Nh6–/+) 9...Qe8 (9...Kc8!?–/+) 10.Qg4=+ Qe6 11.Qg3 Qg6?? (better is 11...Na6 12.Bg7 Bg7 13.Qg7 Ne7–/+) 12.Bb8+= Qg3 13.Bg3 Bb4 14.0–0 (14.a3 Bd6+=) 14...Nf6 15.c3 Bd6 16.Bd6 Kd6 17.d3 Rae8 18.Nd2 b6 19.a4 (19.Rae1 c5+=) 19...Re7 20.c4 Rc8 21.Rfc1 c5 22.a5 Rb8 23.cd5 (23.ab6 Rb6 24.d4 Rc6+/–) 23...Kd5+= 24.e4 Kd4?? (better is 24...Kc6+=) 25.Nf3+– Kd3 26.Ra3 Ke4 27.Re3 (27...Kd5 28.Re7 ba5 29.Rg7+–) 1–0. Blaszczak,Jan – Kedzior,Adam, Poland, 1992.

4.f4 Bf5 5.a3 b5 (5...e6 6.Nf3=) 6.a4 (better 6.Nf3=) 6...a6 (better 6...ba4!? 7.Ra4 Nd7=) 7.ab5+– cb5 (7...e6 8.ba6 Bb4 9.Bc3+–) 8.Bb5!+– Bd7 (8...ab5 9.Ra8 Pinning (9.Ra8 Deflection)) 9.Bd3 e6 (9...g6+–) 10.Qh5 Ke7 11.b5 (11.Bh7?! Qb6+–) 11...g6 (11...Bc8 12.Ba3 Kd7 13.Qf7 Ne7 14.f5+–) 12.Bg6! Bh6?? (12...hg6 13.Ba3 Double attack (13.Qh8 Pinning; 13.Qh8 Deflection)) 13.Ba3 1–0. michaelbuss (2795) – terry8x8, ChessWorld.net, 2011.

4.c4 e5

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

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

4.c4 e6

5.b5 Bd6 6.a4 b6 7.Nf3 c5 8.Be2 Bb7 9.0–0 Nd7 10.d4 Ne7 11.Nc3 0–0 12.Rc1 dc4 (better 12...Rc8!?=) 13.Bc4+– Nd5 14.Qb3 Kh8 (14...Nc3 15.Be6 Kh8 16.Bc3 Bf3 17.gf3+–) 15.Nd5+– (15.Bd5?! ed5 16.Nd5 cd4 17.ed4 Nc5 18.dc5 Bd5+=) 15...ed5 16.Bd5 Bd5 17.Qd5 Qe7 18.Rfd1 Rfd8 19.dc5 (19.Nh4 g6+–) 19...Nc5+– 20.Qc4 Rac8 21.Nd4 Qe5 22.g3 Re8 (22...Bb8 23.Qc2+–) 23.Ba1 (23.Ba3!? Bf8+–) 23...Qe4 24.Nc6 Qf3 25.Rd6 (25.Bd4!?+–) 25...Ne4+= 26.Qf1 (better 26.Rf6! gf6 27.Qf1+–) 26...Nd6= 27.Rd1 (27.Qd1 Qd1 28.Rd1 Nc4=) 27...Ne4=+ 28.Nd4 Qh5 29.Qg2?? (29.Nc6 Ng5–/+) 29...Ng5 (better 29...Qd1 30.Qf1 Qf1 31.Kf1 Rc1 32.Ke2 Ra1 33.f4–+) 30.h4?? (30.g4 Qf7–/+) 30...Nf7 (better 30...Qd1 31.Kh2 Ne4–+) 31.g4 Qc5 32.Qg3 (32.Nc6 a6 33.Bd4 Qc4–/+) 32...Ne5 (32...Qa3 33.Kh2–+) 33.Nf5 Red8 (33...Qc2!? 34.Rf1 Rcd8–/+ (34...Qa4?! 35.Nd6=+)) 34.Bd4 Qd5 35.Kf1?? (35.Ne7!? Qb3 36.Ra1–/+) 35...g6 (better 35...Qh1 36.Qg1 Qf3 37.Re1 Ng4 38.Qg3 Qf5 39.Kg1–+) 36.Nh6 (36.Ne7 Qh1 37.Qg1 Qf3–+) 36...Kg7 37.g5 fg5?? (better 37...Qh1 38.Qg1 Qh4–+) 38.hg5 (38.Be5 Qe5 39.Qe5 Kh6 40.Qg5 Kg7 41.Rd8 Rd8 42.Qe7 Kh6 43.Qd8 Kg7 44.Qc7 Kf6 45.Qh7 g5 46.hg5 Kg5 47.Qf7 a5 48.f4 Kh4 49.Kg2 Kg4 50.Qg6 Kh4 51.Qg5) 38...Re8?? (better 38...Kf8 39.Qf4 Ke8–/+) 39.Ng4 (39.Qf4 Qh1 40.Ke2 Rc2 41.Rd2 Qh5 42.f3 Rd2 43.Kd2 Qg5 44.Qg5+–) 39...Qc4 (39...Qh1 40.Ke2 Rc2 41.Rd2 Rd2 42.Kd2 Qd5+–) 40.Kg1 Kg8 (40...Kf8 41.Be5 (worse 41.Ne5 Qe6+–) 41...Rcd8 42.Rd6+–) 41.Ne5 (41.Be5 Re7 42.Bf6 Qc5 43.Be7 Qe7 44.Nf6 Kf8+–) 41...Qe6 (41...Qb3 42.Ra1 Qe6 43.Qh4+–) 42.Ng4 Rf8 (42...Red8+–) 43.Nh6 1–0. BeepBeepImAJeep (2580) – bidon67 (2095), lichess.org, 2017.

5.cd5 cd5 6.b5 Bd6 (6...Nh6 7.Nc3=) 7.Qh5 (7.Nc3 Ne7=) 7...g6 8.Qh4 (8.Qf3 Nd7=) 8...Kf7 (8...e5 9.d4=) 9.Nf3+= e5 (better 9...Nd7!?+=) 10.Ne5! Kg7 (10...Be5 11.Be5 Combination; 10...fe5 11.Qd8 Pinning (11.Qd8 Deflection)) 11.Nf3 Nh6 12.Bd3 (12.Be2 Nf5 13.Qa4 Nd7+–) 12...Nf5 13.Bf5 Bf5 14.Nd4 g5?? (better 14...Qd7+–) 15.Nf5+– Kg6 16.Qh6 (better 16.Qh3+–) 16...Kf5 17.0–0 (17.h4 gh4 18.Qh4 Ke6 19.Qg4 Kf7+–) 17...Bf8 (17...Nd7+–) 18.Qh5 Nd7 (18...Ke6 19.f4 g4 20.Qg4 f5 21.Qg3+–) 19.f4 Rg8 (19...Ke6 20.fg5 Be7+–) 20.Qh7 (20.Qh7 Ke6 21.Qg8 Kd6 22.Rc1+–) 1–0. GuestDHDM – GuestYKGY, freechess.org, 2018.

4.Nf3 e5

5.a3 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 c6 5.Nf3).

5.Be2 e4 6.Nd4 Bb4 7.Bg4 Bg4 8.Qg4 Qe7 (8...Qd7 9.Ne6 g6 10.f4–/+) 9.0–0 (9.a3!? Bc5 10.Nf5+=) 9...h5 (9...Qd7 10.Ne6 g6 11.f4–/+) 10.Qg6 (10.Qc8 Kf7=+) 10...Kd8 (10...Qf7!? 11.Qg3 Na6–/+) 11.Nf5 (better 11.Ne6 Kc8 12.Ng7=) 11...Rh6?? (better 11...Qd7 12.Qg7 Qg7 13.Ng7 Rh7=) 12.Ne7+– Rg6 13.Ng6 (13.Ng8 Nd7=) 1–0. DEFFM – GuestZLJD, freechess.org, 2018.

3.e4 de4–/+

4.Nc3 Bf5 5.f3 ef3 6.Nf3 Nf6 7.Bc4 e6 8.d4 Nbd7 9.0–0 Bb4–+ 10.Ne2 0–0 11.Ng3 Bg6 12.Bd3 Bd6 13.Ne5 Qc7 14.Bg6 Ne5?? 15.de5= Bc5 16.Kh1+= fg6 17.ef6+– Rae8? 18.fg7 Rf1 19.Qf1 e5 20.Ne4 (20…Be7 21.Qc4 Kg7 22.Qe6+–) 1–0. kehrsam – TeaCzar, ChessWorld.net, 2009.

4.d3 Nf6 5.a3 (5.Nc3 Bg4 6.Qd2 (6.Be2 Be2 7.Nge2 ed3 8.cd3 e5 9.a3 Bd6 10.0–0 0–0 11.Ne4–/+) 6...e5 7.a3 a5 8.b5 ed3 9.Bd3 cb5 10.Bb5 Nc6 11.Qg5–/+) 5...Bf5 (5...Bg4 6.Qd2 Bf5 7.de4 Ne4 8.Qd8 Kd8 9.Bd3 e6 10.Nc3 Nc3 11.Bc3–/+; 5...a5 6.b5 (6.Nd2 Bg4 7.Qb1 ed3 8.Bd3 e6 9.b5 cb5 10.f3 Bf5 11.Bf6–/+; 6.Nc3 ab4 7.ab4 Bg4 8.Qb1 Ra1 9.Ba1 ed3 10.Bd3 e5 11.b5–/+; 6.Qe2 Bg4 7.Qd2 Nbd7 8.de4 Ne4 9.Qf4 Nef6 10.Nf3 ab4 11.ab4–/+) 6...cb5 7.Nc3 Bg4 8.Be2 Be2 9.Nge2 ed3 10.Qd3 Qd3 11.cd3–/+) 6.Nc3 (6.Bf6 ef6 7.Nc3 ed3 8.Bd3 Bd3 9.cd3 Bd6 10.Nf3 Qe7 11.Qe2–/+) 6...e6 (6...ed3 7.Bd3 Bd3 8.Qd3 Qd3 9.cd3–/+ Nbd7 10.Nf3 e6 11.Rc1–/+) 7.de4+= Qd1 (7...Ne4 8.Qd8 Kd8 9.Bd3 Nc3 10.Bc3 Bd3 11.Rd1+=) 8.Rd1 Ne4 9.Bd3 Nc3 10.Bc3 Bd3 11.Rd3 Nd7 12.Nf3 f6 (12...c5 13.Ke2–/+) 13.0–0 0–0–0 14.Nd4 e5 15.Ne6 Re8 16.Nf8 (16.Rfd1 Re6 17.Rd7 Be7–/+) 16...Rhf8 17.Re1 (17.Rh3 h6–/+) 17...Nb6 18.Re4 Rd8 19.f4 Rd3 20.cd3 Nd5 21.Bd2 ef4 22.Bf4 Kd7 23.Be3 a6 24.Kf2 Re8 25.Bd4 g6 26.Rh4 Re7 27.Bc5 Rf7 28.Re4 f5 29.Re1 Rf6 30.Bd4 Re6 31.Be5 Nc7 32.Re3 Nb5 33.a4 Nc7–+ 34.d4 Nd5 35.Rb3 b5 36.a5 Nf6 37.Bf6 Rf6 38.Rh3 h5 39.Ke2 Kd6 40.Kd3 Kd5 41.Re3 Re6–+ 42.Rg3 h4 43.Rg5 Rd6 44.g3 hg3 45.hg3 Rf6 46.g4 Kd6 47.Kd2 f4 48.Ke2 f3 49.Kf2 Kd7 50.Rc5 Rf4 51.d5 cd5 52.Rd5 Kc7 53.Rg5+= Rf6 54.Rc5 Kb7 55.Re5= Rf4 56.Re7 ½–½. Tiedemann,Joern (1940) – Mantau,Jan (2060), RSS7E basic–18, 2009.

4.Ne2 Nf6 5.Ng3 e5 6.a3 a5 7.ba5 Qa5 8.Nc3 Be6 9.Nce4 Ne4 10.Ne4 Be7 11.Bd3 Nd7 12.0–0 0–0 13.Qh5 g6 14.Qh6 f5 15.Ng5 Bg5 16.Qg5 Qc5 17.Bc3 Rf7 18.Bb4 Qb6 19.h4 Qd8 20.Qd8 Rd8 21.f3 c5 22.Bc3 b6 (better is 22...c4!? 23.Be2 Nc5=) 23.Bb5+/– Nb8 24.Be5 Bd7? 25.Bc4+– Nc6 26.Bc7 Re8 27.Bf7 Kf7 28.Bb6 c4 29.Rfb1 Rb8 30.a4 Ne5 31.a5 Bc6 32.a6 Ra8 33.a7 Nd7 34.Bd4 Ke6 35.Rb4 Kd5 36.c3 Nc5 37.Ra5 Kd6 38.Rc5 Kd7 39.Rbc4 Rc8 40.Rc6! Ra8 41.Rc7 Kd6 42.R4c6 Kd5 43.Rc8 (43.Rc8 Rc8 44.Rc8 h6 45.a8Q Ke6 46.Qc6 Ke7 47.Re8 Kf7 48.Qe6; 43.Bf6 Ra7 44.c4) 1–0. Fournier,Frederic (1815) – d_chess (1860), rated blitz game (2/12), 2002.

4.Bc4 Nf6

5.Ne2 e6 6.a3 Nbd7 7.0–0 b5 8.Ba2 c5 9.bc5 Bc5 10.d4 ed3! 11.Qd3 (11.cd3 Bb7 Combination; 11.Qd3 Ba6 Combination) 11...Qb6 12.Nd2 0–0 13.Ne4 Be7 14.Bd4 Qc6 15.f3 ½–½. Gibney,Eugene J – Morrell,Gordon, Canada ch–50, 1994. (=1.e4 c6 2.b4 d5 3.Bb2 de4)

5.h3 e6 6.Ne2 Bb4 7.Nbc3 –/+.

5.h3 Bf5 6.g4 (6.Ne2!?–/+) 6...Bg6–+ 7.Ne2 e6 8.a3 (8.Nf4 Nbd7–+) 8...Nbd7 9.Ng3 Bd6 10.g5 Nd5 11.h4 (11.Nc3 Nc3 12.Bc3–+) 11...Qc7?? (better is 11...Ne5 12.Be2 f5–+) 12.h5–/+ Bf5 13.Nf5 ef5 14.Bd5 cd5 15.Nc3 Be5 (15...Qc6 16.h6 Be5 17.b5–/+) 16.Nd5 (better is 16.d4!? ed3 17.Qd3+=) 16...Qc6–+ 17.Nc3 Nb6 18.Qe2 Nc4 19.0–0–0 Nb2 20.Kb2+= Rc8 21.Rh3 0–0 22.d4 Bf4 23.b5 Qc4 24.g6 fg6 25.hg6 hg6 26.Qc4 Rc4 27.Nd5 Bd6 28.Kb3 Rfc8 29.c3 Kf7 30.Rg1 Ke6 31.Nb4 g5 32.Nc6 Kd5?? 33.Nb4?? Bb4–+ 34.ab4 g4 35.Rh5?? Rc3 36.Ka4 g6 37.Rg5 Kd4 38.Rg6 Rc2 39.Rg7 R8c3 40.Rd7 Ke5 41.Ra1 Rc7 42.Rd8 Rf2 43.Rad1 Rc3 44.Ra1 Rfc2 45.b6 ab6 46.Kb5 Rc6 47.Re8 Re6 48.Rb8 Rc7 49.Rd1 g3 50.Rbd8 Rg7 51.R8d5 Kf6 52.Rf1 Re5 0–1. Posch,Sandor (1965) – Szunyogh,Istvan (1925), Szekesfehervar HUN, City Ch, 2014.

3.Nf3 a5

4.b5! cb5 5.e3 b4 6.a3 ba3 (6...Nc6 7.ab4 Nb4 8.Ne5 Nc6 (8...Nf6 9.Bb5 Bd7 10.Nd7 Nd7–/+; 8...Bd7=+) 9.Bb5!? Bd7 10.Nd7 Qd7 11.c4) 7.Na3 Nf6 8.Nb5 e6 9.Be5 Na6 10.c3 b6!? (10...Be7? 11.Be2 (11.Qa4 0–0 12.Qa5 Nc7 13.Bc7 Ra5 14.Ra5) 11...0–0 12.0–0!!) 11.Nfd4 Bc5 12.Nc6 Qd7 13.d4=+ Qc6 (13...Bf8=+ 14.Qa4 Bb7 (14...Qc6 15.Nc7) 15.Nba7!) 14.dc5 Qc5 15.Bd3 Bd7 (15...0–0 16.Bf6! (16.Bd6 Qc6 17.Bf8 Kf8?) 16...gf6 17.Qg4 Kh8 18.Qh4 f5 19.Qf6 Kg8 20.g4!) 16.Nd6 Ke7 17.0–0 Bc6 (17...Ne4 18.Be4 de4 19.Qh5; 17...h5 18.Qf3!; 17...Rhd8 18.Nb7) 18.Rb1 Rhd8 (18...Nd7 19.Bg3 e5 20.Nf5 Kf8 21.Qh5) 19.Nb5 Kf8=+ (19...Bb7+–) 20.Bd4 Qe7 21.Bb6 Rdb8 22.Nd4 Be8 (22...Bb7 23.Ba5!) 23.Ba6 Ra6 24.Bc5 Qc5 25.Rb8 Qc3 26.Qb1 e5 27.Rc1 Qd2 (27...Qa3 28.Nb5?) 28.Nf3 Qe2 29.Rb2=+ 1–0. Wolff – Rao, 2nd Metro Open, 1989. (=1.Nf3 d5 2.b4 c6 3.Bb2?! a5)

4.c3 Nd7+= 5.e3 e5 6.a3 e4 7.Nd4 Ne5 8.Be2 Nf6 9.h3 Bd6 10.f4 (10.–0 0–0–/+) 10...ef3!–/+ 11.Nf3 (11.Nf3 Nc4 Combination; 11.Bf3 Nd3 Double attack; 11.gf3 Nh5 Combination) 11...Nf3 12.Bf3 Bg3 13.Ke2 Bf5 14.d3 0–0 15.Nd2 Re8 16.Nf1 Bc7 17.Kd2 Bb6 (17...Be5 18.Qc2–/+) 18.g4–/+ Bg6 19.g5 (19.h4!?–/+) 19...Ne4!–+ 20.de4 de4 21.Ke1 ef3 22.Qd8 Rad8 23.Kf2 Be3! 24.Kg3? (24.Ne3 Rd2 Double attack) 24...Bg5 25.Rh2 Rd3 0–1. Miquel Badenes,Jose (1880) – Sospedra Sebastian,Juan (2300), Mislata op, 2007. (=1.Nf3 d5 2.b4 c6 3.Bb2 a5)

4.c3 Nf6 5.e3 Qb6 6.a3 Bf5 7.d4 e6 8.Nbd2 Nbd7 9.Be2 Bd6 10.0–0 (10.c4 A) worse is 10...ab4 11.c5 Nc5 12.dc5 Bc5 13.ab4 Ra1 14.Qa1+/– (14.Ba1?! Qb4 15.Bf6 gf6+=); B) 10...Qc7=) 10...Qc7 (10...ab4 11.cb4 Qc7 12.h3=) 11.c4= Ng4 12.g3 h5 13.Nh4 g6 (13...Bh7 14.b5=) 14.cd5 cd5 15.Ndf3 (15.Rc1 Qd8+=) 15...Ke7 (better is 15...Be4!?=) 16.Rc1+/– Qb6 17.b5 Ndf6 (17...Be4 18.Ng5+/–) 18.Ng5 (18.Nf5 gf5 19.h3 Ne3 20.fe3 Rag8=) 18...Rac8 19.Qd2 Ne4 20.Ne4 de4 21.Rc8 Rc8 22.Rc1 Rc1 23.Qc1 Nf6 24.Nf5 ef5 25.Bc4 Qc7 26.Qc3 Nd7 27.Qb3 a4 28.Qa2 Nf8 29.Bf7 Kf6 (29...Qc2 30.Bc4+=) 30.Bc4 h4 31.Kg2 g5 32.Bc1 g4 33.Bd2 hg3 34.hg3 Nh7 35.Bb4 Bb4 36.ab4 Ng5 37.b6?? (better is 37.Be2 Qh7 38.Qd5 (38.Qa4?? Nf3 39.Bf3 gf3 40.Kg1 Qh3 41.Qa6 ba6 42.ba6 Qg2#) 38...Qh3 39.Kg1 Nf3 40.Bf3 gf3 41.Qd6 Kf7 42.Qd7 Kf6 43.Qd8 Kf7 44.Qd5 Ke8 45.Qe6 Kd8 46.Qd6 Kc8 47.Qe6 Kd8 48.Qd6 Kc8 49.Qe6 Kd8=) 37...Qh7–+ 38.Kf1 Qh1 39.Ke2 Nf3 40.Qd2 Nd2 41.Kd2 Qb1 42.Kc3 Qc1# 0–1. Scharff,Georges (1630) – Pieri,Thierry (1930), Vitrolles Majeur op, 2004. (=1.Nf3 d5 2.b4 c6 3.Bb2 a5)

4.a3 ab4

5.ab4 Ra1 6.Ba1 Na6 7.b5 cb5 8.e3 b4 9.Ne5 Qa5 10.Bd4 Nf6 11.Bd3 g6 12.Qe2 Bg7 13.Bb5 Kf8 14.0–0 Nc7 15.Bd3 Ne6 16.c3 Nd4 (16...b3 17.f4=) 17.cd4 e6 (17...Bh6 18.f4=) 18.g4 (18.Rc1!? Bd7 19.Qf3=) 18...Nd7=+ 19.f4 f5 (19...f6 20.Nd7 Bd7 21.f5=+) 20.gf5 (20.Rc1 Ke7=) 20...ef5 (20...gf5 21.Rc1 Qd8 22.Qh5 Ne5 23.de5=+) 21.Rc1= Ke7 22.Qg2 (22.Bb5 Ne5 23.fe5 Be6=+) 22...Bf6 (22...Ne5 23.fe5 Be6 24.Rc5=+) 23.Qh3 (23.Be2 Ne5 24.de5 Bg7=) 23...Qd8 (23...Ne5 24.de5 Bg7 25.Be2=) 24.Qf3 (24.Bb5 Ne5 25.de5 Bg7=) 24...Nb6 (24...Ne5 25.de5 Bg7 26.Rc5=) 25.Qd1 (25.Kh1 Bd7=) 25...Kf8 (25...g5 26.Qc2 gf4 27.ef4 Rg8 28.Kf1=+) 26.Qb3= Be7 27.Be2 Kg7 28.Nd3 Exerts pressure on the isolated pawn (28.d3 g5 29.Rf1 Bd6=+) 28...Nc4 (28...Qd6 29.Bf3=) 29.Ne5 (29.Nb4!? Be6 30.Nd3=) 29...Ne5=+ 30.de5 Be6 31.d4 Qa5 (31...Qd7 32.Bf3=+) 32.Nd2 Rc8 33.Rc8 Bc8 34.Qc2 Qa1 35.Qb1 (35.Nb1 Bd7=+) 35...Qc3 36.Qd3 Bd7 37.Kf2 0–1. Lo,Kin Mun Dominic (2170) – Lim,Yee_Weng (2335), Singapore SIN, Commonwealth Ch, 2009. (=1.Nf3 d5 2.b4 c6 3.Bb2 a5 4.a3 ab4)

5.ab4 Ra1 6.Ba1 Na6 7.c3 Nf6 8.d3 Bg4 9.Nbd2 Bf3 10.Nf3 e6 11.g3 Be7 12.Bg2 0–0 13.0–0 Qb6 14.Qc2 Ra8 15.Bb2 Nc7 16.Bc1 Ra1 17.Be3 Qa6 18.Ra1 Qa1 19.Qc1 Qa2 20.Bf1 Nb5 21.Nd4 Na3 22.Qd1 (22.Bg5 h6 23.Bf4 c5 24.bc5 Bc5=) 22...Nb1 23.Qb3 (better is 23.Qc1!?=) 23...Qb3–/+ 24.Nb3 Nc3 25.Na5 Bb4 26.Nb7 c5 (better is 26...Nd7–+) 27.Bc5= Bc5 28.Nc5 d4 29.h3 (29.Nb3 e5=) 29...e5 (29...Nfd5 30.Kg2+=) 30.e3= de3 31.fe3 Nd1 (31...Nfd5 32.d4=) 32.e4 (32.d4!?+=) 32...Ne3= 33.Be2 Nc2 34.Kf2 Nd4 35.Bd1 Ne8 36.Ba4 Nd6 37.Ke3 f6 38.Bb3 (38.Nb3 N6b5=) 38...Nb3 (38...Kf8 39.Bd5+=) 39.Nb3 Kf7 40.d4 ed4 41.Kd4 Nb5 42.Ke3 Nd6 43.Nd4 Nc4 44.Kd3 Ne5 45.Ke2 Ke7 46.g4 g6 47.Ke3 Kf7 48.Nb5 Ke6 49.Nc7 Kd7 50.Nd5 Ke6 51.Nf4 Ke7 52.Nd5 Ke6 53.Nf4 Ke7 54.Nd5 Ke6 55.Nc7 Kd7 56.Nb5 Ke6 57.Nd4 Kd7 58.Ne2 Ke6 59.Nf4 Ke7 60.Kd4 Kd6 61.Nd5 Ke6 62.Ke3 f5 63.gf5 gf5 64.Nc7 Kd7 65.Nb5 fe4 66.Ke4 Ng6 67.Kf5 Ke7 68.Nd4 Kf7 69.Nf3 ½–½. Kuznetsov,Petr – Karasev,Vasiliy, Kemerovo RUS, City Ch, 2014. (=1.Nf3 d5 2.b4 c6 3.Bb2 a5)

5.ab4 Ra1 6.Ba1 Qb6!?

5.ab4 Ra1 6.Ba1 Nd7 7.c4 Ngf6 8.cd5 Nd5 9.b5 cb5 10.e4 Nc7 11.Qb3 Nf6 12.Ne5 e6 13.Bb5 Nb5 14.Qb5 Nd7 15.0–0 f6 16.Nc4 Be7 17.Bd4 0–0 18.Nc3 Kh8 19.Rc1 Qe8 20.Qa5 Nb8 21.Bc5 Nc6 22.Qa3 Bc5 23.Qc5 Qe7 24.Qe7 Ne7 25.Nd6 Nc6 26.Rb1 Na5 27.Ra1 Nc6? (better is 27...b6+/–) 28.Ra8+– Ne7 29.Na4 Rd8 (29...e5 30.Nb6 g6+–) 30.Nf7 (30.Nf7 Kg8 31.Nd8+–) 1–0. marekt – whitecat25, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 c6 3.Bb2 a5 4.a3 ab4)

4.a3 ab4 5.ab4 Ra1 6.Ba1 f6 7.d4 =.

4.ba5 Qa5

5.e3 b5 6.Be2 =.

5.e3 Qb6 6.Qc1 Bg4 7.Be2 Nd7 8.0–0 (8.c4 e6=) 8...e5=+ 9.h3 Bf3 10.Bf3 Bd6 11.Nc3 (11.d4 e4 12.Be2 Bb8=) 11...Ngf6=+ 12.Rb1 0–0 13.Ba1 (13.a4 Qa5–/+) 13...Qc7–/+ 14.d3 (14.a4 Nc5–/+) 14...b5–+ 15.Qd2 b4 16.Nd1 (16.Ne2 Ra2 17.Nc1 Ra7–+) 16...e4 (16...Ra2 17.e4–+) 17.Be2 (17.de4 de4 (17...Ra2?! 18.ed5 cd5 19.Bb2=+; 17...Ne4?! 18.Be4 de4 19.c3=+) 18.Be2 Ra2–+) 17...Ra2 18.d4 (18.Bd4 c5 19.Bf6 Nf6 (19...gf6?! 20.de4 c4 21.ed5=) 20.de4 de4–+ (Worse is20...Ne4 21.Qd5 Rc2 22.Bd3–/+)) 18...c5 19.dc5 Qc5 20.Bb2 Rc8 21.Qe1 Qc2 22.Rc1 Qc1 (22...Rb2?! 23.Nb2 Qc1 24.Qc1 Rc1 25.Rc1–/+) 23.Bc1 Rc1 24.Bb5 (24.f4 b3 25.Qf2 Rcc2–+) 24...b3 25.Qc3 Rc3 26.Nc3 Rd2 (26...Rc2 27.Nb1–+) 27.Ba4 (27.Rb1 b2–+) 27...Nc5 28.Bb5 Rc2 29.Nb1 b2 30.g3 Ne6 31.Ba4 Rc8 (31...Rc1 32.Bb3–+) 32.Nd2 Rc1 33.Nb1 Ng5 34.Kg2 Nh3! 35.Rd1 (35.Kh3 Rf1) 35...Ng4 36.Rd5 Rg1 (36...Bf8!? 37.Rd2 Rb1 38.Bc2–+) 37.Kh3 Nf2 38.Kh2 Rb1 39.Bc2 (39.Rd6 Ng4 40.Kh3 f5 41.Rd8 Kf7 42.Rd7 Ke6–+) 39...Rc1 40.Rd6 Kf8 41.Rb6 Rc2 42.Rb8 Ke7 43.g4 Nd3 (43...Ng4 44.Kg3 f5 45.Kf4 Rf2 46.Kg5 Ne3 47.Rb7 Kd6 48.Rb6 Kc5 49.Rb7–+) 44.Kg3 Rc1 (44...Re2 45.Rb7 Kd6 46.Rb6 Kc5 47.Rb3–+) 45.Rb2 Nb2 46.Kf4 Rc4 47.g5 Ke6 (47...Nd1 48.Kg3 f6 49.Kf4 fg5 50.Kg5 h6 51.Kf4 g5 52.Ke5–+) 48.Kg4 Nd3 49.Kh4 Kf5 50.g6 Kg6 (50...fg6 51.Kh3 Rc2 52.Kh4 g5 53.Kg3 Nf4 54.ef4 gf4 55.Kh3 e3 56.Kh4 Rh2) 51.Kg3 (51.Kg4 h5 52.Kh3 Rc2 53.Kh4 Nf4 54.ef4 Rc3 55.f5 Kh6 56.f6 g5) 51...Kh5 52.Kg2 (52.Kh3 g5 53.Kh2 Kg4 54.Kg2 Rc2 55.Kf1 Kg3 56.Kg1 Rc1) 52...Kg4 53.Kh2 (53.Kf1 Kf3 54.Kg1 Rc1 55.Kh2 h5 56.Kh3 Rh1) 53...Rc2 54.Kg1 Kf3 55.Kh1 Kg3 56.Kg1 Rc1 0–1. Machete99 – PolarChess, ICC, 2002.

5.e3 Qb6 6.Bd4 c5 7.Be5 Nc6 =.

5.e3 Bg4 6.Be2 Nd7 7.0–0 Ngf6 8.d4 e6 9.Nbd2 Bd6 10.c4 0–0 11.c5 Bb8 12.a4 Qc7 13.g3 h6 14.Qc2 Bf5 15.Bd3 Bd3 16.Qd3 Nh7 17.e4 Ndf6 (17...de4 18.Ne4 Nhf6 19.Rfb1=) 18.e5+= Ne8 19.Bc3 b6? (better is 19...Qe7+=) 20.cb6+– Qb6 21.Rfb1 Qd8 22.Bb4 f5 23.Bf8 Nf8 24.Qc3 Ba7 25.Nb3 c5 26.Nc5 Rc8 27.Rb7 Bc5 28.dc5 g5 29.c6 Nc7 30.Qc5 Na6 31.Qb6 Nc7 32.a5 Na8 33.Qd8 Rd8 34.Nd4 Rc8 35.a6 f4 36.a7 Nc7 37.Rb8 (37.Rb8 Rb8 38.ab8Q fg3 39.Qc7 gh2 40.Kh2 g4 41.Ra7 g3 42.fg3 Nd7 43.Qd7 Kf8 44.Qf7) 1–0. Fournier,Frederic – Masera,Michel, Open Paris FRA, 1998.

5.e3 Bg4 6.Be2 Nd7 7.Nc3 Ngf6 8.0–0 e6 9.d3 Bb4 10.Qd2 0–0 11.Nd4 Be2 12.Nde2 e5 13.Qc1 Qc7 14.a3 Bd6 15.h3 Rfe8 16.a4 e4 17.de4 Ne4 18.Ne4 Re4 19.Nc3 Re7 (19...Rc4 20.Rd1–/+) 20.Ba3 Ne5 21.Bd6 Qd6 22.Ne2 Qg6 23.Ng3 (23.Qa3 Ree8+=) 23...h5 (23...Nc4 24.Ne2–/+) 24.Kh2 h4 25.Ne2 Nc4 26.Nf4 Qg5 27.c3 Qe5 28.Kg1 g5 29.Ne2 Re6 30.Nd4 Rg6 31.Qc2 g4 32.hg4 Rg4 33.Qf5 (33.Kh1 Qg5+=) 33...Qf5 34.Nf5 Nd2?? (better is 34...Kh7!?+=) 35.Rfd1?? (better is 35.Nh6 Kf8 36.Ng4 Nf1 37.Kf1+– (37.Rf1?! Ra4 38.Ne5 f6+–)) 35...Ne4?? (better is 35...Rg5 36.Nh4 Ne4+=) 36.f3 (36.f3 Nc3 37.fg4 Nd1 38.Rd1 Ra4 39.Rb1+/–) 1–0. Fournier,Frederic (1635) – odrap, Active, 2006.

5.g3 Nf6 6.Bg2 Bf5 (6...Qb6 7.Qc1=) 7.0–0 Nbd7 8.d3 e6 9.Nbd2 Bd6 10.e4 Bg4 11.Re1 Ne5 (11...Bf3!? 12.Bf3 Bb4=) 12.ed5+= Nf3 13.Bf3 Bf3 14.Qf3 Qd5 15.Ne4 Be7 (better is 15...Ne4!? 16.Bg7 Nd2 17.Qd5 cd5 18.Bh8 Nf3 19.Kf1 Ne1 20.Ke1 b5=) 16.Bf6+/– (16.Nf6?! Bf6 17.Qd5 cd5 18.Bf6 gf6=) 16...Bf6 17.Nf6 gf6 18.Qf6 Rg8 19.Rab1 b5 (19...Qd7!?+/–) 20.c4! Qd7 (20...bc4 21.Qh4) 21.cb5 cb5 22.Qf5 Ke7 23.Rb5+– Ra2 24.Qc5 Kf6 25.Qc3 Kg6+/– 26.Qe5 h6 27.Qe4 Kg7 28.Rb7 Qc8? 29.Qe5 Kg6 30.Rc7 Qa6 31.h4 Rf8 32.h5 Kh7 33.Qf6 (33.Qf6 Kg8 34.Re4+–) 1–0. Pitkaaho,Aki – Terasti,Pasi (2170), Oulu op FIN, 2001. (=1.Nf3 d5 2.b4 c6 3.Bb2 a5 4.ba5 Qa5)

4.ba5 Ra5

5.e3 Nf6 6.c4 e6 7.d4 Bb4 8.Bc3 Bc3 9.Nc3 0–0 10.c5 b6 11.Rb1 Ne4 12.Ne4 de4 13.Nd2 b5 14.Qc2 f5 15.Be2 Rf7 16.0–0 Rfa7 17.Rb2 Nd7 18.f3 ef3 19.Nf3 Ra3 20.Bd3 R7a4 21.Qb1 Bb7 22.Bc2 Ra8 23.e4 f4 24.Bb3 Qf6 25.e5 Qh6 26.Qe1 Nf8 27.Nd2 Nd7 28.Qe2 g5 29.Qg4 Kh8 30.Ne4 Qh4 31.Qh4 gh4 32.Rf4 Nf8 33.Rbf2 Ng6 34.Rf7 Bc8 35.Nd6 Ba6 36.Rc7 h3 37.Be6 Nf8 38.Bb3 hg2 39.Rc6 Ng6 40.Rc7 Nh4 41.Rff7 Rb3 42.ab3 h6 43.e6 Ng6 1–0. COMP – COMP, 2002.

5.e3 Nf6 6.c4 e6 7.d4 Bb4 8.Bc3 Bc3 9.Nc3 0–0 10.c5 b6 11.Rb1 Ne4 12.Ne4 de4 13.Nd2 b5 14.Qc2 f5 15.Be2 Rf7 16.0–0 Rfa7 17.Rb2 Nd7 18.f3 ef3 19.Nf3 Ra3 20.Bd3 R7a4 21.Qe2 Ba6 22.Rfb1 Nc5 23.Bc2 Ne4 24.Ba4 Nc3 25.Qd3 ba4 26.Qa6 Nb1 27.Qc6 Kf7 28.Ne5 Kf6 29.Rb6 Qe7 30.Rb7 Rc3 31.Re7 Rc6 32.Rf7 Kg5 1–0. COMP – COMP, 2002.

3.Nf3 Qb6

4.a3 c5 5.e3 (5.Nc3 Qd6+/–) 5...Bg4 (5...Nf6 6.Nc3 cb4 7.ab4=) 6.c4 (6.Nc3 Qd6+/–) 6...e6 7.Qa4 Qc6 (7...Nc6 8.Ne5 Bf5 9.cd5 ed5 10.Bb5=) 8.b5 (8.Qc6 bc6 9.bc5 Nd7 10.cd5 ed5+/–) 8...Qb6+= 9.Ne5 Bf5 10.d4 Nf6 11.Nd2 Nbd7 12.Ndf3 Be7 13.Be2 0–0 14.0–0 Ne5 15.Ne5 a6 16.cd5 ab5 (worse is 16...Nd5 17.Nd7 ab5 18.Qa8 Ra8 19.Nb6 Nb6 20.Bb5+/–) 17.Qb5 Qb5 18.Bb5 Ra5 19.a4 Nd5 (19...ed5!? 20.dc5 Bc5+=) 20.dc5+/– f6 (20...Bc5 21.Nd7 Rc8 A) worse is 22.Nc5 Rc5 23.Rac1 A1) 23...Rab5? 24.ab5 Rc1 25.Rc1+– (25.Bc1?! Bd3 26.Rd1 Bb5+/–); A2) 23...Rc1 24.Rc1 Ra8+=; B) 22.Rfc1+/–) 21.Nc4+– Ra7 22.Nd6 Bd6 23.cd6 Rd8 24.Ba3 (better is 24.Rfe1!?+–) 24...Nc3+/– 25.Bc5 Nb5 26.ab5 Ra1 27.Ra1 Bd3 28.b6 Kf7 29.f3 Bb5 30.Ra5 Bc6 31.e4 e5 32.Kf2 Ke6 33.Ke3 g5 34.g3 Rg8 35.Bb4 h6 36.f4?? (better is 36.g4+/–) 36...gf4–/+ 37.gf4 Rg4 38.d7? (better is 38.Rc5 Kd7 39.Rc4 Rf4 40.Be1–/+) 38...Kd7–+ 39.Ra2 Rf4 40.Rd2 Ke8 41.Rb2 Re4 42.Kd3 f5 43.Bd2 Rh4 44.Bc3 e4 45.Kd4 f4 46.Ke5 f3 47.Be1 Rh5 48.Kf4 Rd5 49.Bf2 Kf7 50.Rc2 Ke6 51.Be3 h5 52.h4 Rd8 53.Rc5 Rf8 54.Kg3 f2! 55.Bf2 Rf3 56.Kg2 Rb3 57.Bd4 e3 58.Kg3 Bd5 59.Ra5 Rd3 60.Bg7? Rd2 61.Bc3 Rg2 62.Kf4 Rc2 63.Ra3 e2 64.Be1 Bc4 65.Ke3 Rb2 66.Ra5 Bb5 67.Kf2 Kd5 68.Ra1 ½–½. Majul Martinez,Isolina (2075) – Puuska,Heini, Yerevan ol (Women), 1996. (=1.Nf3 d5 2.b4 c6 3.Bb2 Qb6)

4.a3 Nd7 5.e3 Ngf6 6.c4 e6 7.Nc3 Be7 8.Be2 dc4 9.Bc4 Qc7 10.0–0 b5 11.Be2 0–0 12.Rc1 Qb6 13.d4 Bb7 14.Bd3 h6 15.Bb1 Rfe8 16.Qd3 Nf8 (16...a5 17.e4 ab4 18.ab4=) 17.Ne5 a5 18.Na2 ab4 19.Nb4 c5 20.dc5 Bc5 21.Rfd1 Be4 22.Qc3 Red8 (22...Bb4 23.Qb4 Ra4 24.Qc5 Qc5 25.Rc5 Bb1 26.Rb1+=) 23.Ng4 (better is 23.Rd8 Bb4 24.Qb4 (24.ab4?! Qd8 25.Nc6 Bc6 26.Qc6 Qd5+=) 24...Qd8 25.Be4+–) 23...e5?? (better is 23...Rd1 24.Rd1 Rd8 25.Nf6 gf6+–) 24.Nf6+– gf6 25.Be4 (25.Qc5? Rd1 26.Rd1 Qc5 27.Be4 Ra4–+) 25...Rd1 26.Rd1 Rc8 27.Rc1 Qd6 28.Nd3 Ne6 29.Bf5 Rd8 30.Be6 (better is 30.Qb3+–) 30...fe6 (30...Qd3 31.Bg4 Bf8+–) 31.Nc5 Qd1 32.Qe1 Qe1 33.Re1 1–0. Scholbach,Tillmann (1775) – Odrich,Joerg, Leipzig VfB op, 2004.

4.a3 Nf6 5.Bd4 Qc7 6.Nc3 =.

4.a3 Bg4 5.d4 (5.Bd4 Qc7+=) 5...Nd7 6.e3 0–0–0 (6...Ngf6 7.c4=) 7.Be2 (7.c4 Ngf6=) 7...Bf3 8.Bf3 e5 (Better is 8...Ngf6!?=) 9.de5+/– g6 10.e6!+– Bb4? 11.ab4 Qb4 12.Bc3 Qc5 13.ed7 Kd7 14.Bh8 f6 15.c4 Qc4 16.Ra7 Kc7 17.Nd2 Qc3 18.Qb1 Rb8 19.Qa1 Qa1 20.Ra1 b5 21.0–0 c5 22.Rfb1 Kd6 23.Ra6 1–0. Woschkat,Karl_Heinz – Douglas,Rob, IECG, 1995.

4.a3 a5

5.Bd4 Qc7 6.Be5 Qd8 7.ba5 Qa5 8.Bc3 Qd8 9.e3 e6 10.Be2 Nf6 11.0–0 Bd6 12.Be5 Be7 13.Bb2 0–0 14.c4 Nbd7 15.d4 Ne4 16.Bd3 f5 17.Qc2 Rf6 18.c5 Rh6 19.Rd1 Qc7 20.g3 Ndf6 21.Ne5 b6 22.cb6+/– Qb6 23.f3 Ng5 24.h4 Nf7 25.Qc6 Qb2? 26.Qa8+– Ne5 27.Qc8 Kf7 28.de5 Qe5 29.Ra2 Qg3 30.Rg2 Qh4 31.Bf1+– Nh5 32.Qc7 Ng3 33.Nc3 Kf8 34.Qc8?? Kf7+/– 35.Qd7 Nf1 36.Nd5! ed5 37.Qd5 Kf6 38.Kf1+– Qa4 39.Ke2 Ba3?? 40.Qd8 (40...Kf7 41.Rd7 Qd7 42.Qd7 Be7 43.Qf5 Bf6 44.e4+–) 1–0. Kuperski,Marek – Blaszczak,Jan, corr 2. AMM Poland, 1994.

5.Bd4 Qc7 6.Be5 Qd8 7.Nc3 f6 8.Bb8 Rb8 9.ba5 Qa5 10.e4 e5 11.ed5 cd5 12.Qe2 Bd7?? (better is 12...Kf7+=) 13.Ne5!+– (13.Ne5 Ne7 14.Nd7 Kd7 15.Qf3+–) 1–0. Yannick – Pawnstorm, playchess.de, 2005.

5.Bd4 Qd8 6.e3. Rodriguez Abreu,E – Lopez Paz,P, 3524 II Guillermo Garcia IM, 1999. (=1.Nf3 d5 2.b4 c6 3.Bb2 Qb6 4.a3 a5)

3.Nf3 Nd7

4.a4 f6 5.e3 Nh6 6.Nd4 e5?? (better is 6...Nb8 7.f4 e5 8.fe5 fe5=+ (< 8...Bb4 9.Qh5 Kd7 10.Qh3 Kc7 11.Qg3+/–)) 7.Ne6+– Qe7 (better is 7...Qb6 8.a5 Qb4 9.Nc7 Kd8+–) 8.Nf8?? (better is 8.Nc7 Kd8 9.Na8+–) 8...Qf8 (8...Nf8 9.b5=) 9.b5 (9.c3 Qe7=) 9...Nb6 (9...Qb4 10.Bc3 Qh4 11.Be2=) 10.d3 Bd7 11.c4 dc4 12.dc4 0–0–0 13.Ba3 Bf5 14.Bf8+– Rd1 15.Kd1 Rf8 16.Be2 Rd8 17.Ke1+– Bd3 18.bc6 bc6 19.Bd3 Rd3 20.Ke2 Rd7 21.c5 Nd5 22.Rd1 Re7 23.a5 Nb4 24.Nc3+– Na6 25.Ne4 f5 26.Nd6 Kc7 27.Rab1 Nc5+/– 28.Rb7?? Nb7–+ 29.Nb7 Kb7 30.Rb1 Kc7 31.a6 Nf7 32.Rb7 Kd6 33.Rb1 Nd8 34.Kf1 Ne6 35.f3 Nc5 36.h4 Na6 37.Ra1 Nc5 38.Kf2 e4 39.f4 Nd3 40.Kg3 g6 41.Kh2 Rb7 42.g4 Rb2 43.Kg1 fg4 44.h5 Re2 45.Ra7 gh5 46.Rh7 Re3 47.f5 Rf3 48.Rh5 Ke5 49.Rh6 Rf5 50.Rc6 (50...e3 51.Rc8–+). metal – forever666, Live Game Caissa's Web, 2006.

4.e3 Ngf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Nbd7).

4.g3 Ngf6 5.Bg2 g6 6.0–0 Bg7 7.d3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 0–0 5.Bg2 d5 6.0–0 c6 7.d3 Nbd7).

4.e3 Qc7

5.a3 e5 6.c4 e4 7.Nd4 dc4 8.Nc3 Ngf6 9.Qc2 c5 10.bc5 Nc5 11.Bc4 a6 =.

5.a3 e5 6.Be2 Ngf6 7.0–0 Be7 8.c4 0–0 9.cd5 cd5 10.Nc3 b6 11.Rc1 Qb7 (11...Qb8 12.Nh4=) 12.Nb5+= a6 13.Nc7 Ra7 14.Ne5 Ne5 (better is 14...Bd6!? 15.Nd7 Nd7 16.Ba6 Ra6 17.Na6 Qa6+=) 15.Be5+– Nd7 16.Bg3 f5? (better is 16...Nf6+–) 17.Bf3 Bd8 (17...Nf6+–) 18.Nd5 (better is 18.Bd5 Kh8 19.Bb7 Bb7+–) 18...Qa8 19.Ne7! Be7 20.Ba8 Ra8 21.Qb3 Kh8 22.d4 Bb7 23.Rc7 Bc8 24.Rfc1 Bg5 25.Qc4 b5 26.Qc2 f4 27.Rc8 Rac8 28.Qc7 Rc7–+ 29.Rc7 fg3 30.Rd7 gf2 31.Kf1 Be3 32.d5 h6 33.d6 Rc8 34.Rc7 Rd8 35.d7 Kg8 36.Rc8 Bg5 37.Kf2 Kf7 38.Kf3?! Ke7 39.Rd8 Kd8 40.g4 Kd7 41.h3 Bc1 42.Ke4 Ba3 43.Kd5 Bb4 44.Kd4 Be7 45.Kc3 b4 46.Kb3 a5 47.Ka4 Ke6 48.Kb3 Ke5 49.Ka4 Kf4 50.Kb3 Kg3 51.Ka4 Kh3 52.Kb3 Kg4 53.Ka4 h5 54.Kb3 h4 55.Ka4 h3 56.Kb5 h2 57.Kc6 h1Q 58.Kd7 Bc5 59.Ke6 Qh5 60.Kd7 b3 61.Kc6 b2 62.Kd7 b1Q 63.Ke6 Qb6 64.Kd7 Qhh6 65.Ke8 Qb7 66.Kd8 Qh8 0–1. Fournier,Frederic (1835) – llatzerbru (1880), Active (5/0), 2004.

5.a3 Ngf6 6.c4 e5 7.cd5 Nd5 8.Qc2 Bd6 9.d4 a5 10.b5 c5 11.de5 Ne5 +=.

5.a3 Ngf6 6.d4 a5 7.b5 Nb6 8.Nc3 e6 9.Ne5 c5 10.Be2 cd4 11.ed4 Bd6 =.

5.a4 e5 6.c4 Ngf6 7.b5 e4 8.Nd4 Ne5 9.cd5 cd5 10.Nc3 Bb4 11.Be2 0–0 12.0–0 Neg4 Threatening mate... how? 13.f4 ef3 14.Nf3 Re8 15.h3 (better 15.Rc1 Bc5 16.Kh1=) 15...Ne3 16.de3 Bc3 17.Rc1 (better 17.Qc1!? Ne4 18.Bd3–/+) 17...Re3–+ 18.Bc3 Rc3 19.Qd2 Ne4 20.Qb2 (20.Rc3 Qb6 (20...Qc3?! 21.Qd5 Qe3 22.Kh2 Qf4 23.Kg1 Bh3 24.Bd3–/+) 21.Qd4 Nc3–+) 20...Be6 (20...Rc1 21.Qc1 Qg3 22.Ne1–+) 21.Nd4 Rc8 (21...Qb6 22.Rcd1–+) 22.Ne6 (22.Rc3 Nc3 23.Ne6 fe6–+) 22...fe6 23.Rc3 Nc3 (23...Qc3 24.Qc3 Nc3 25.Bd1–+) 24.Bg4 Qe5 (better 24...Qc5 25.Kh1 Re8–+) 25.Qf2=+ Threatening mate: Qf7 25...h6 (25...Na4?? 26.Qf7 Kh8 27.Qf8 Rf8 28.Rf8) 26.Re1 (26.Qa7 Rc4 27.Qb7 Ra4 28.Qe7 Ne2 29.Be2 Qe2 30.b6–+) 26...Ne4–/+ 27.Qe3 (27.Qa7 h5 28.Bf3 Qg3–+) 27...Rc2 (27...b6 28.Qd3–+) 28.Bf3 (28.Qa7 Kh8 29.Qe3 Ra2–+) 28...Qg3 (better 28...Rc3!? 29.Qe2 Qd4 30.Kh2 Rc4–+) 29.Be4–/+ Qe3 30.Re3 de4 31.Re4 (31.Re4 Kf7 32.Kh2–/+). BeepBeepImAJeep (2620) – ediboss21 (2420), lichess.org, 2019.

5.a4 e5 6.Be2 Bb4–/+ 7.0–0 Ngf6 8.d3 0–0 9.Nh4 Nc5 (9...b6 10.Nd2–+) 10.f4–/+ Ncd7 11.Nf5 g6 (11...Re8!?–/+) 12.fe5=+ Ne5 13.Nh6 (13.Rf4!?–/+) 13...Kg7–+ 14.Qc1 Kh6 (14...Qe7!? 15.e4 de4–/+) 15.Rf6–/+ Kg7 16.Rf4 Kg8?? (better 16...Bd6–/+) 17.Rb4+– 1–0. guest532 – guest597, chessclub.com, 2018.

5.c4 dc4 6.Bc4 Ngf6 7.0–0 e6 8.a3 Bd6 9.d4 (9.Nc3 0–0+=) 9...0–0 10.Nbd2 Nd5 11.Rc1 Qd8 (11...f5 12.Be2+=) 12.e4+/– Nf4 13.Re1 Bc7 14.g3 Ng6 15.h4 (15.b5 Nb6 16.bc6 Nc4 17.Rc4 bc6 18.Rc6 Bb7+/–) 15...Nf6 16.Nh2 h6 17.Bd3 Re8 18.h5 Nf8 19.Nc4 b5? (better is 19...a5+=) 20.Ne5+– Be5 21.de5 N6h7 22.Rc6 Bd7 (22...a6 23.Rd6 Qe7 24.Ng4+–) 23.Rd6 Qe7 24.Qd2 Rec8 25.Kg2 Bc6 26.Nf3 a6 27.Nd4 Bb7 28.Nb3 Rc6?! (28...f5 29.f3 Ng5+–) 29.Na5 Rc7 30.Bb1 (30.Rd1 f6 31.Rb6 Ra7+–) 30...Nd7 (30...Rb8 31.Rd1+–) 31.Rc1 Rc1 32.Rd7 Rc7 33.Re7 Re7 34.Qd6 Rae8 35.Nb7 Rb7 36.Qa6 Reb8 37.Bd4 Rd7 38.Be3 Nf8 39.a4 ba4 40.Qa4 Rdb7 41.Bc5 Nd7 42.Bd6 Rd8 43.Bd3 1–0. Bauer,Christian (2645) – Tabin,Rene (1895), Martigny SUI, Open, 2014.

5.c4 e6 6.Be2 Ngf6 7.a3 a5 8.b5 dc4 9.Bc4 cb5 (9...Bd6 10.Nc3=) 10.Bb5+= Qb6 11.a4 (11.Qb3 Qd8+=) 11...Bb4 (11...Be7 12.d4+=) 12.0–0 (12.Bf6 gf6 13.0–0 0–0+–) 12...0–0 13.Na3 Rd8 14.Rc1 Nd5 15.Qc2 Ba3 (15...Qc5 16.Nc4+=) 16.Ba3+– Nb4 17.Qb3 (17.Qb1 e5+–) 17...Nc5 18.Qc4 Ncd3 19.Rc3 Bd7 20.Rd3 Nd3 21.Qd3 Bb5 22.Qb1 (22.Qb5 Qb5 23.ab5 Rd5+=) 22...Rd3 23.Bc1 Rc8 24.Nd4 (worse 24.Qb5 Qb5 25.ab5 a4=+) 24...Rd4 (24...e5!? 25.Nb5 Rcd8+–) 25.ed4+– Qd4 26.Qb5 h6 (26...Qc4 27.Bb2 Qb5 28.ab5 Rc5+–) 27.Qb7 (27.Qa5?! Qa1 28.h4 Rc1 29.Rc1 Qc1 30.Kh2 Kh7=) 27...Qc4 (27...Rc2 28.Qb8 Kh7 29.Qb5+–) 28.Bb2 Qc2 (28...Qc6 29.Qc6 Rc6 30.Rc1+–) 29.Bc3 Rd8 (29...Rc4 30.Qb8 Kh7 31.Qe8+–) 30.Qb5 Qe4 31.f3 Qd5 32.Rb1 (32.Qa5?! Qa5 33.Ba5 Ra8+–) 32...Qa2 33.Rb2 Qa1 34.Kf2 Qc1 (34...Qa3+–) 35.Qe5 f6 36.Qe6 Kh8 37.Qe7 Rc8 38.Rb7 Rg8 39.g4 Qh1 40.Bf6! Qh2 (40...gf6 41.Qh7) 41.Ke3 Qg1 42.Kf4 Qh2 (42...Qg3 43.Kg3 Kh7 44.Qe4 Kh8 45.Qg6 gf6 46.Qh6) 43.Kf5 (43.Kf5 Qe5 44.Be5 Kh7 45.Qf6 h5 46.Rg7 Rg7 47.Qg7) 1–0. Adlai – Roddro, internet, 2019.

5.d4 e5 6.de5 Bb4 7.Nbd2 Be7 8.e6+= Ndf6 (8...fe6 9.Bg7 Discovered attack) 9.ef7 Kf7 10.Bd3 Nh6 11.c4 Rd8 (11...Bf5 12.Bf5 Nf5 13.cd5 cd5 14.Qb3+=) 12.Qb3 Kg8 13.cd5 cd5 (13...Nd5? 14.e4+–) 14.0–0 Nf7 15.Rac1 Qd6 16.Rfd1 Ng4 17.Bd4 Nfe5 18.Ne5 Ne5 19.Ne4 Qe6 20.Nc5 Bc5 21.Rc5 Attacks the isolani on d5 21...Nd3 22.Rd3 b6 23.Rc7 Rd7 24.Rdc3 Ba6 (better 24...Bb7+–) 25.Qa4+– b5 26.Qa5 Rf8? (26...Rf7 27.Rf7 Kf7 28.Rc7 Ke8 29.Rg7 Rc8+–) 27.Rd7 Qd7 28.Qa6 Qf5 (28...Qf7 29.f3 b4 30.Rc8+–) 29.f3 Qb1 (29...Qd7+–) 30.Kf2 Qb2 (30...Qg6 31.Qa7 h6+–) 31.Kg3 Qd2 32.Qe6 Kh8 33.Bg7! Kg7 (33...Kg7 34.Rc7) 34.Rc7 (34.Rc7 Kh8 35.Qe5 Rf6 36.Qf6 Kg8 37.Qg7) 1–0. guest110 – guest127, chessclub.com, 2018.

5.d4 Ngf6 6.a3 e6 7.Nbd2 a5 (7...b5 8.Bd3=) 8.b5 c5 9.Be2 (9.c4 Be7=) 9...c4=+ 10.c3 (10.Bc3 Bd6=+) 10...b6 (10...a4 11.0–0=+) 11.a4 Bd6 12.h3 h6 13.Qc2 0–0 14.0–0 Re8 15.Ba3 Bb7 16.Bd6 Qd6 17.Rfd1 e5 (better 17...Qc7=) 18.Nc4!+– dc4 19.de5 Qc5 (19...Qe6 20.ef6 Nf6 21.Rd4+–) 20.ef6 Nf6 21.Rd4 Rad8 (21...Be4 22.Qa2+–) 22.Bc4 Rd4? (better 22...Bf3 23.gf3 Qh5+–) 23.cd4 Qc8 (23...Qc7 24.Ne5 Bd5 25.Rc1+–) 24.Ne5 Re7 (24...Bd5 25.Rc1 Qb8 26.Bd5 Nd5 27.Qc4+–) 25.Rc1 Qe8 (25...Qa8 26.Qg6 Nd5 27.Qf5+–) 26.Qb3 Bd5 (26...Re5 27.de5 Qe5 28.Bf7 Kf8+–) 27.Bd5 Nd5 28.Qd5 1–0. Pierre – Pedroso, internet, 2020.

5.d4 Ngf6 6.a4 a6 7.Bd3 e6 8.b5 ab5 9.ab5 Ra1 10.Ba1 Bb4 (10...cb5 11.0–0=+ (11.Bb5? Qa5 12.Nc3 Ne4–+)) 11.Nbd2= Qa5 12.0–0 Bd2 (12...cb5 13.Qe2=) 13.Qd2+= Qb5?? (better 13...Qd2 14.Nd2 cb5+=) 14.Bb5+– (14.Bb5 cb5 15.Qb4+–) 1–0. DEFFM – GuestWQKL, freechess.org, 2018.

5.d4 Ngf6 6.Be2 g6 (6...e6 7.a3=) 7.0–0+= Bg7 8.c4 0–0 9.Nbd2 Ne4 10.Qc2 Nd2 11.Nd2 dc4 12.Nc4 Nb6 13.Rac1 Be6 14.Nb6 Qb6 15.a3 Rac8 16.h3 Rfd8 17.Rcd1 Rd7 18.Rd2 Rcd8 19.Bc3 Bf5 20.Qc1 e5 21.de5 Rd2 22.Bd2 Be5 23.Bc3 Qc7 24.Qb2 f6 25.Bc4 Kg7 26.Re1 Bc3 27.Qc3 Qe5 28.Qb3 Be4 29.Rd1 Rd1 30.Qd1 Bd5 31.Bf1 Kf7 32.Qg4 h5 33.Qd7 Qe7 34.Qc8 Kg7 35.Bd3 Be6 36.Qb8 a6 37.Qg3 Bf7= 38.f4 h4 39.Qf3 f5 40.e4 fe4 41.Be4 Bd5 42.Bd5 cd5 43.Qc3 Kh7 44.Kf2 Qe4 45.Qc7 Kh6 46.Qb8 Qd4 47.Kf3 Qe4 48.Kf2 Qc2 49.Kf3 Qe4 50.Kf2= Qc2 51.Kg1 Qc1 52.Kh2 Qc3 53.Qf8 Kh5 ½–½. Galoic,B (1995) – Jambresic,Filip, Krapina Open, 2011.

5.Be2 e5 6.a3 Ngf6 7.0–0 Bd6 8.h3 Qd8 9.c4 0–0 10.Nc3 Qe7 11.Qb3 (11.cd5 Nd5 12.Nd5 cd5 13.Rc1=) 11...h6 (better is 11...dc4!? 12.Bc4 Nb6+=) 12.cd5+/– cd5 13.Nd5 Nd5 14.Qd5 Nf6 15.Qb3 Be6 16.Bc4 Qd7? (better is 16...Bc4 17.Qc4 Rac8+=) 17.Be6+– fe6 18.Ne5 Be5 19.Be5 Nh7 20.d4 Rad8 21.Rac1 Nf6?! 22.Rc7 Qb5 23.Qe6 Kh7 24.Qe7 Rd7 25.Qf8 Rc7 26.Bc7 Qd7 27.Be5 Nd5 28.Rc1 Ne7 29.Rc7 Ng6+– 30.Qg7 Qg7 31.Rg7 (31.Rg7 Kh8 32.Rg6 Kh7 33.Rg7 Kh8 34.d5 b5 35.d6 a6 36.d7 a5 37.d8Q) 1–0. Fournier,Frederic – floresson, Active (5/0), 2005.

5.Be2 e5 6.c4 Bb4 7.cd5= cd5 (7...Ngf6 8.dc6 bc6 9.Qc2=) 8.Na3 (8.Ne5!? Ne5 9.Qa4 Bd7 10.Qb4+=) 8...a6 (8...Ba3 9.Ba3 Ngf6 10.Qa4=) 9.Rc1 (9.Qa4 Ba3 10.Qa3 Ne7=+) 9...Qb8 (9...Qa5 10.Nb1 Bd6 11.Bc3–/+) 10.0–0 (10.Ne5!? Ne7 11.Nd7 Bd7 12.Nc2+=) 10...Ne7 (10...Bd6 11.d3–/+) 11.Qa4 (11.Nc2 Bd6 12.Ba3 Ba3 13.Na3 Qd6–/+) 11...Bd6 12.Rc8? (better 12.d3–/+) 12...Nc8 13.d4 (13.d3 Ncb6 14.Qb3 0–0–+) 13...e4 (13...b5 14.Qc2 b4 15.Nb1–+) 14.Ne5 Be5 (better 14...b5!? 15.Qc2–+) 15.de5 Ncb6 (15...Ne7 16.Qd4–+) 16.Qb3 (16.Qa5 h5 17.Bd4–/+) 16...0–0 (16...Qc7 17.Rc1 Nc5 18.Qb4–+) 17.Bg4 (17.Bd4 Qd8 18.Rb1 Qe7–/+) 17...Qe8 (17...Re8 18.Bd4 Qc7 19.Rb1–+) 18.Bd7 Nd7 19.Qd5 b5 20.Qe4 (better 20.Rc1–+) 20...f5?? (better 20...Qe6–+) 21.Qd5= Kh8 22.Rd1 (22.e6!? Nf6 23.Qf5=) 22...Rd8–/+ 23.Bd4? (23.Kf1 Nc5 24.Qd8 Qd8 25.Rd8 Rd8–/+) 23...Nb8 (23...Ne5 24.Qc5–+) 24.Qf3 (24.Qb3 Nc6–/+) 24...Qe6 (24...Nc6 25.Nc2–+) 25.Qe2 Nc6 26.Nc2 (26.f4 Rf7–/+) 26...Qa2–+ 27.Ra1 Qe6 28.Ra6?? (better 28.Qe1 Ra8 29.Nb4–+) 28…Nd4 1–0. DEFFM – GuestBMAA, freechess.org, 2016.

5.a3 a5

6.ba5 e5 7.a6 ba6 8.Nc3 Bd6 9.Rb1 Ngf6 10.Nh4 Nc5 11.Be2 Rb8 =+.

6.b5 e5 7.c4 Ngf6 8.cd5 cd5 9.Nc3 Be7 10.Rc1 Qb8 11.Be2 Bd6 =.

6.Nc3 ab4 7.ab4 Ra1 8.Ba1 e5 9.b5 Bd6 10.Be2 Ngf6 11.Nh4 Nb6 =+.

6.c4 e6 7.b5 Ngf6 8.Nc3 Be7 9.Be2 dc4 10.Bc4 0–0 11.0–0 Rd8 =.

6.Be2 ab4 7.ab4 Ra1 8.Ba1 e5 9.Bc3 Bd6 10.b5 Ngf6 11.Nh4 Nb6 =+.

5.c4 e5

6.a3 e4 7.Nd4 dc4 8.Qc2 Ne5 9.Qe4 Nf6 10.Qc2 b5 11.f4 Ng6 =.

6.Qb3 e4 7.Nd4 dc4 8.Bc4 Ne5 9.Be2 Qd6 10.a3 a5 11.ba5 Nf6 =.

6.b5 e4 7.Nd4 Ne5 8.cd5 cd5 9.Be2 (9.Nc3 Nf6=) 9...Nf6 10.0–0 Bd6 11.a4 (11.Ba3 Ba3 12.Na3 Bg4=) 11...0–0 (11...Nc4 12.Bc4 Bh2 13.Kh1 dc4 14.g3–/+) 12.Nc3 (12.Ba3 Bd7=) 12...Nd3 (better 12...Nc4!? 13.Bc4 dc4=+) 13.Bd3= White fights for the Initiative 13...Bh2 (13...ed3 14.h3=) 14.Kh1 ed3 15.f4 Bg4?? (better 15...Ng4 16.Qf3 a6=) 16.Qe1 (16.Nd5!? Nd5 17.Qg4 Nf6+–) 16...Be2 17.Kh2 (17.Nce2 de2 18.Qe2 Bg3+–) 17...Ng4 (17...Bf1 18.Qf1 Qc4 19.a5+–) 18.Kg1+– Bf1 19.Qf1 f5 (19...Qd8 20.Nf3+– (20.Qd3?! Qh4+–)) 20.Qd3 Qd7 21.Nf3 Qe7? (21...Rfd8 22.a5+–) 22.Nd5 (better 22.Ba3!? Qd7 23.Bf8 Kf8 24.Qd5 Qd5 25.Nd5 Rd8+–) 22...Qf7 23.Ng5 Qh5 24.Ne7 Kh8 25.Nf3 (25.Qd5 Rae8 26.Qb7 Qh2 27.Kf1 Qh1 28.Ke2 Re7 29.Qe7 Qg2 30.Kd3 Nf2 31.Kc2 Rc8 32.Bc3 Rc3 33.dc3 Qa8+–) 25...Rad8 26.Qc3 Do you see the mate threat? 26...Rf7 27.Ba3 Rdf8 (27...Rf6 28.Qc7 Re8 29.Qb7 Rh6+–) 28.Ng5 (better 28.Qc7 Re8 29.Qb7+–) 28...Qh2+– 29.Kf1 Threatening mate: Nxf7 29...Qh1 30.Ke2 Qg2 31.Kd3 Rd8 (31...Rf6!?+–) 32.Kc2+– Ne3?? (better 32...Rff8+–) 33.Qe3 Re7 34.Be7 (worse 34.Qe7 Qd2 35.Kb1 Qd1 36.Ka2 Qc2 37.Bb2 Qc4 38.Ka3 Rd3 39.Bc3 Rc3 40.Kb2 Qb3) 34...Rc8 35.Kb2 Qd5 36.Rc1 Re8 (36...Rc1 37.Kc1 h6 38.Ne6+–) 37.Rc5 (37.Rc7 h6 38.Qc3 hg5+–) 37...Qd7 38.Re5 (better 38.Nf7!? Kg8 39.Qb3 Qe7 40.Nd6 Kh8+–) 38...h6 39.Bb4 (39.Nf7 Kg8 40.Nd6 Re7 41.Re7 Qd6 42.Rb7 Qb4 43.Qb3 Qb3 44.Kb3+–) 39...Rc8 (39...Re5 40.fe5 hg5+–) 40.Re7 Qd5 41.Nf7 (41.Bc3 Rg8 42.Bg7 Rg7 43.Re8 Qg8 44.Rg8 Rg8 45.Qe5 Rg7 46.Ne6 Kh7 47.Qg7) 41...Kg8 42.Ne5 (42.Ne5 a6 43.Bc3+–; 42.Nh6 Kh7 43.Qg1 Rc2 44.Kc2 Qe4 45.Re4 fe4 46.Bf8 g6 47.Qd4 g5 48.Qg7) 1–0. BeepBeepImAJeep (2715) – mooty (2385), lichess.org, 2016.

6.b5 Ngf6 7.Be2 (7.Nc3 e4 8.Nd4 c5=) 7...Bd6 8.a4 (8.bc6 bc6 9.cd5 Nd5=+) 8...0–0 9.h3 Re8 10.d4 e4 (10...dc4 11.Bc4 cb5 12.Bb5=+) 11.Nfd2=+ Nf8 (11...dc4 12.Nc4 Bb4 13.Nbd2 cb5 14.ab5=) 12.Nc3 Ng6 13.bc6 bc6 14.cd5 cd5 15.Nb5 Qe7 16.Nd6 Qd6 17.Ba3 Qa6?? (better 17...Qe6=) 18.Ba6+– Ba6 19.Nb3 Rab8 20.Nc5 Bc4 21.Rc1 Nh4 22.Rc4 (better 22.Rg1!? Rb6+–) 22...dc4 23.0–0 g5 (23...Nf5 24.Qe2+–) 24.Qe2 h5 (24...c3 25.Qa6 Kg7 26.Rc1+–) 25.Qc4 g4 26.hg4 Ng4 (26...hg4 27.Qa6 Kg7 28.Qa7+–) 27.Nd7 (better 27.Qd5 Ng6 28.Ne4 Rbd8+–) 27...Kg7 (27...Rbd8 28.Qd5 Ng6 29.Qh5 Rd7 30.Qg4+–) 28.Nb8 Rb8 29.Qc5 Rb6 (29...Ng6 30.Qa7 Rb3 31.Qc5+–) 30.Qg5 (better 30.Qf8!? Kg6 31.Qg8 Kf6 32.Qd8 Kg6 33.Qh4 Re6+–) 30...Ng6 31.Qh5 Nh6 (31...Nf6 32.Qa5+–) 32.a5 Rf6 (32...Rb3 33.Ra1 Rc3 34.Bc5+–) 33.f4 (33.f4 Rf5 34.Qe2 Ra5 35.Ra1+–; better 33.Qc5!? a6+–) 1–0. BeepBeepImAJeep (2475) – Banditmoskva (1870), lichess.org, 2017.

6.cd5 Bb4 7.Qa4 Bd6 8.dc6 bc6 9.d4 Rb8 10.Ba3 ed4 11.Bd6 Qd6 =.

6.cd5 Bb4 7.Qa4 Bd6 8.dc6 bc6 9.Qg4=.

6.cd5 cd5

7.a3 Bd6 8.h3 Ngf6= 9.Nc3 0–0 10.Nb5 Qb8 11.Nd6 Qd6 12.Be2 e4 13.Nd4 Ne5 14.Rc1 Bd7 15.0–0 a6 16.f3 Nd3 17.Bd3 ed3 18.Qb3 Qg3 19.Kh1 (19.Qd3 Bh3 20.Rf2 Rac8+=) 19...Nh5 (19...Bh3 20.gh3 Qh3 21.Kg1 Qg3 22.Kh1–/+) 20.Qd5+= Bh3 21.f4 Bg4 22.Nf5?? (better 22.Nf3+=) 22...Bf5–/+ 23.Qf5 Qh4 24.Qh3 (24.Kg1!? Ng3 25.Qd3–/+) 24...Ng3–+ 25.Kg1 Qh3 26.gh3 Nf1 27.Rf1 Rfc8 28.Bc3 b6 (28...Rc4 29.Kf2 Rac8 30.Rb1 Rc3 31.dc3 Rc3 32.a4–+) 29.Kf2 (29.Rb1 a5–+) 29...a5 (29...f5 30.Rb1–/+) 30.Rg1 g6 31.Kf3 ab4 32.ab4 Ra2 (32...f5 33.e4 fe4 34.Ke4 Rc4 35.Ke3 Re8 36.Kd3 Rf4 37.Rg3–+) 33.Ke4 (33.e4 Ra7–/+) 33...Rd8–+ 34.Rg5 (34.f5 Kf8–+) 34...f5 35.Ke5?? (better 35.Kf3–+) 35...Kf7 36.h4 h6 37.Rg3 h5 (37...Ra7 38.Rg6 Kg6 39.h5 Kh5 40.Kf5–+) 38.Rg1 (38.Rg5–+) 38...b5 (better 38...Ra7 39.Rg6 Kg6–+) 39.Rb1?? (39.Ra1 Ra4 40.Ra4 ba4 41.Bb2–+) 39...Re8 (39...Ra6 40.e4 Re6) 40.Kd5 (40.Kd4 Ke6 41.Kd3 Rd8 42.Bd4 Rd6=+) 40...Raa8–/+ 41.Kc5 Rab8 42.Ra1 Rec8 43.Kd4 Rd8 44.Kc5 Rb7 (better 44...Rd7–/+) 45.Ra6? (better 45.Kc6 Re7 46.Kb5=+) 45...Rc8 (45...Rc7!? 46.Kb5 Rd5 47.Kb6 Rc3 48.Ra7 Ke6 49.dc3 Rd6 50.Kc5–+) 46.Rc6 Rc6 47.Kc6 Rb8 48.Kc7 (48.Kd5 Rd8 49.Ke5 Re8 50.Kd4 g5 51.fg5 Re4 52.Kd3 Rh4–+) 48...Ra8 49.Kb6 Rb8 50.Kc7 Ra8 51.Kb6 Rb8?? (51...Rc8 52.Bd4–+) 52.Kc7 Ra8?? (52...Re8 53.Bd4–+) 53.Kb6 Rb8?? (53...Rc8 54.Bd4–+) 54.Kc7 Ra8?? (54...Re8 55.Kb6–+) 55.Kb6 Rb8?? (55...Rc8 56.Bd4–+) 56.Kc7 Re8 57.Kc6?? (57.Bd4–+) 57...Rb8 (better 57...Rc8 58.Kb5 Rc3–+) 58.Kc7= ½–½. GuestJDQB – awfen, freechess.org, 2017.

7.Bb5 a6? 8.Be5+– Qb6 9.Nc3 ab5 10.Nd5 Ne5?? (10...Qa7 11.Nc7 Kd8+–) 11.Nb6 (11.Ne5?? Qd6 12.Qf3 Nf6 13.Nf6 gf6 (13...Qf6?! 14.Qd5–/+) 14.Nf7 Kf7 15.Qh5 Kg7 16.Qb5 Qb4–+) 11...Nf3 (11...Nd3 12.Ke2 Be6 13.Na8+–) 12.Qf3 1–0. b4_player – guest, casual, 2013.

7.Bb5 e4 8.Nd4 Ngf6 +=.

7.Nc3 Bb4 8.Nd5 Qd6 9.Nb4 Qb4 10.Be5 (10.Ne5? Qb2 11.Nc4 Qf6–+) 10...Ne5 11.Ne5 +/–.

7.Nc3 Bd6 8.Nd5 Qd8 +–.

7.Nc3 Ne7 8.Rc1 Qb8 9.Qb3 f6 10.Nd5 Nd5 11.Qd5 Qd6 12.Qd6 Bd6 13.a3 e4 (13...a5!? 14.ba5 Ke7+/–) 14.Nd4+– Ne5 15.f4 Nd3 (15...ef3 16.gf3 g5 17.f4 gf4 18.ef4+–) 16.Bd3 ed3 17.Rc3 Ke7 18.Rd3 Bd7 19.Ke2 Bg4 20.Kf2 Rac8 21.h3 Bd7 22.Rc3 g5 23.Re1 Rc3 24.Bc3 Rc8 (24...g4 25.hg4 Bg4 26.d3+–) 25.fg5 fg5 26.e4 Be6 27.Nf5 Kd7 28.Bf6 Rc2 29.Bg5 Be5 30.g4 Ra2 31.Be3 Bb2 32.Ba7 Ba3 33.Be3 Bb4 34.Rb1 Ra4 35.d4 Bc4 36.Rd1 b5 37.d5 Bc3 38.Bd4 Ba5 39.Kf3 Ra3 40.Be3 Bc7 41.d6 Ba5 42.e5 Bc3 43.Ke4 b4 44.Rc1 Ba6 45.Nd4 Bb7 46.Kf5 Ba6 47.g5 Ra5 48.Rd1 (48.Ke4 Bb7 49.Kf4 Ra8+–) 48...Bc4 49.Ke4 (49.Kf4 Ra1 50.Ra1 Ba1+–) 49...Bd5 (49...b3!?+/–) 50.Kf4+– b3 51.Bd2 Ra1 52.Ra1 (52.Bc3?! Rd1 53.Nb5 Rd3=+) 52...Ba1 53.Nb5 Bf7 (53...Bd4 54.Be3 (54.Nd4?? b2 55.e6 Be6–+) 54...Ba1 55.Kf5+/–) 54.h4 Bg6 55.Bc3 Bc3 56.Nc3 b2 57.Ke3 Ke6 58.Kd4 b1Q 59.Nb1 Bb1 60.Kc5 Be4? (61.h5 Bf5+–; better is 60...Bg6!?+/–) +/–. b4_player (2155) – yu2aai (1825), GameColony.com, 2002.

7.Nc3 Ngf6

8.Qb3 Nb6?? 9.Nb5+– Qb8 (9...Qe7 10.Be5 Be6+–) 10.Be5 (10.Ne5?! a6 11.Na3 Qd6+–) 10...Qe5 (10...a6 11.Bb8 ab5 12.Bb5 Bd7 13.Bd7 Nbd7 14.Bf4+–) 11.Ne5 Be7 (11...Ke7 12.Rc1 Bd7 13.Nd7 Kd7 14.Rc7 Ke8 15.Rb7+–) 12.Nc7 (12.Nc7 Kf8 13.Qa3+–) 1–0. DEFFM – GuestYVGP, freechess.org, 2018.

8.Nb5 Qb6 9.Rc1 Bd6 10.a4 (worse 10.Nd6 Qd6 11.a3 0–0+=) 10...a5?? (better 10...Ke7+–) 11.ba5+– (11.Nd6?! Qd6 12.ba5 0–0+=) 11...Ra5 (11...Qd8 12.Nd6 Kf8+–) 12.Rc8 (12.Rc8 Ke7 13.Rh8+–) 1–0. Vendelo – Rocky, internet, 2019.

8.Nb5 Qb6 9.Rc1 e4?? 10.Nh4 (10.Bd4 Qd8 11.Nc7 Qc7 12.Rc7 ef3 13.Qf3 Bd6 14.Rd7 Kd7 15.Bf6 gf6 16.Qf6 Rf8 17.Bb5 Kc7+–) 10...Bb4 (10...Nc5 11.bc5 Bc5 12.Bd4+–) 11.Nc7 Qc7 (11...Kd8 12.Na8 Qa5 13.Qc2+–) 12.Rc7 0–0 13.Nf5 Ba5 14.Rc1 Nb6 (14...Kh8+–) 15.Rc8! Nc8 (15...Rac8 16.Ne7 Double attack (16.Ne7 Decoy); 15...Nc8 16.Bf6 Combination; 15...Rfc8 16.Ne7 Double attack (16.Ne7 Decoy)) 16.Bf6 gf6 (16...Nd6 17.Nd6 gf6 18.Qg4 Kh8+–) 17.Qg4 (17.Qg4 Kh8 18.Qg7) 1–0. Pereira – Morten, internet, 2020.

8.Nb5 Qb6 9.Be5 Ne5 10.Ne5 Be7+/– (10...Bb4? 11.Qa4 Bc5 12.Nc7 Kf8 13.Na8+–).

8.Nb5 Qb8? 9.Rc1+– Bd6?? (9...Bb4 10.Nc7 Kd8 11.Ne5 Ne5 12.Be5 Ne4 13.Ne6 Be6 14.Bb8 Rb8+–) 10.Rc8! (10.Rc8 Ke7 11.Rb8 Bb8 12.Qc2+–) 1–0. rickdragon (2560) – iozeph (2610), net–chess.com, 2013.

5.c4 Ngf6

6.a3 e5 7.cd5 Nd5 8.Qc2 Bd6 9.d4 a5 10.b5 c5 11.de5 Ne5 +=.

6.Qb3 e5 7.cd5 Nd5 8.Bc4 e4 9.Qc2 ef3 10.Bd5 fg2 11.Bg2 Qd6 =.

6.Nc3 e5 7.cd5 Bb4 8.dc6 bc6 9.a3 Bd6 10.Qc2 Rb8 11.Be2 0–0 =.

6.d4 e5 7.de5 Bb4 8.Nbd2 Bd2 9.Qd2 Ne4 10.Qd4 Qa5 11.Nd2 Nb6 =.

6.cd5 Nd5 7.a3 e5 8.Qc2 Bd6 9.d4 a5 10.b5 c5 11.de5 Ne5 +=.

4.e3 e6

5.a3 Ngf6 6.c4 Bd6 7.d4 0–0 8.Nbd2 e5 (Unregistered player Black disconnected and forfeits 1–0). Machete99 – guest2142, ICC, 2002.

5.Bd3 Bb4?? 6.Bg7 e5 7.Bf1 +–.

5.Bd3 Bb4?? 6.Bg7 e5 7.Bh8?! e4 +–.

5.Bd3 Ngf6 6.0–0 (6.b5!?=) 6...Bb4–/+ 7.c3 (7.Ne5 Qc7 8.f4 Bd6 9.Nd7 Bd7–/+ (9...Nd7?! 10.Bg7 Rg8 11.Bc3=)) 7...Be7 8.Ba3 Ba3 9.Na3 Qa5 10.Nc2 h6 (10...e5 11.Bf5–/+) 11.Nfd4 0–0 12.Nb3 Qc7 13.c4 Ne5 14.Qe2 Nd3 15.Qd3 a6 16.cd5 cd5 17.Rac1 b5 18.Ne1 Qd8 19.Nd4 Bb7 20.Nef3 Qd6 21.h3 Rac8 22.Nb3 Ne4 23.Na5 Rc1 24.Rc1 Rc8 25.Rc8 Bc8 26.Nd4 Qb4 27.Nac6–/+ Qb1?? 28.Qb1+– 1–0. pinecrest1981 – cozMc, Live Game Caissa's Web, 2004.

3.Nf3 e6

4.a3 f6 5.e3 Bd6 6.Be2 Ne7 (6...e5 7.Nc3 a5 8.b5 e4 9.Nd4 c5 10.Nb3 Ne7 11.d3=) 7.0–0 0–0 (7...e5 8.c4 dc4 9.Bc4 b5 10.Ba2 Bg4 11.Qb3=) 8.c4 (8.Nc3 e5 9.e4 d4 10.Na2 Be6 11.c3=) 8...c5 (8...dc4 9.Bc4 b5 10.Ba2= (10.Bb3 a5 11.Nd4=) 10...a5 11.Nd4=) 9.bc5+= Bc5 10.d4 Bb6 (10...Bd6 11.c5+= (11.Nc3+=)) 11.c5 (11.Nc3 Nbc6+=) 11...Bc7 12.Nc3 Nbc6 13.Nb5 e5 14.de5 fe5 (14...Be5 15.Qd2+=) 15.Nc7 (better is 15.e4!? Bb8 16.ed5 Nd5 17.Nd6+/–) 15...Qc7= 16.Qc2 (16.Qb3 Bf5=) 16...e4 (16...Bf5 17.Qc3 Bg4 18.Rae1=) 17.Nd2 Bf5 18.Qc3 Qe5?? (better is 18...Rf7=) 19.Qe5+– Ne5 20.Be5 Ng6 (20...Nc6 21.Bd6 Rf6 22.f3 ef3 23.Bf3+– (worse is 23.gf3 Rd8+–; worse is 23.Nf3 Re8+–)) 21.Bg3 (21.Bd6 Rf7+–) 21...Rac8 22.Rab1 (22.Bd6 Rf6+–) 22...Rc7 (22...Rc5 23.Rb7 Rc2+–) 23.Bc7 1–0. Neumann,Frank (1635) – Matzen,Jan (1700), RSS5E NoEngine–107, 2010.

4.Na3 Nf6 5.Rc1 Bb4 6.Bf6 Qf6 7.Nb1 Qd8 8.e3 0–0 9.h4 b6 10.Bd3 Be7 11.Ng5 g6 12.Nf3 Bf6 13.Bg6 fg6 14.d4 b5 15.Ke2 Qa5 16.a3 b4 17.Qd2 Qa6 18.Ke1 ba3 19.Na3 (19.Nc3–+) 19...Qa3 20.Rb1 Qa2 21.Rd1 Nd7 22.Qc3 Qa6 23.Rf1 c5 24.Rd3 Qd6 25.Rd1 a5 26.Qa3 a4 27.dc5 Qc5 28.Qa2 Qb4 29.Nd2 Ba6 30.Rh1 Bc3 31.f3 Bc4 32.Qb1 Bd2 33.Kf2 Qc3 34.e4 Qd4 35.Kg3 Bf4 36.Kg4 Qf2 37.Kh3 Qg3# 0–1. Skaki119 – Holmes03, computer chess game, 2000.

4.a4 Bb4?? 5.Bg7+– 1–0. DEFFM – aiueo, freechess.org, 2018.

4.a4 Qb6 5.b5 (5.Bd4 Qb4 6.c4 Nf6=+) 5...cb5 (5...Nf6!?=) 6.Bd4+= Bc5?? (better 6...Qc7 7.ab5 Nd7+=) 7.a5+– (7.a5 Bd4 8.ab6 Ba1 9.Na3+–) 1–0. DEFFM – Nikmet, freechess.org, 2018.

4.a4 f5 5.b5 Nf6 6.e3 Be7 7.Be2 0–0 8.0–0 Ne4 9.d3+= Nf6 10.c4 Bd7 11.Nc3 Qe8 12.Ne5 Bd6 13.Nd7 Nbd7 14.Qc2 Qe7 15.Nb1 Rab8 16.Ba3 Ba3 17.Na3 Rfc8 18.Qb3 Qf7 19.cd5 ed5 20.e4 de4 21.Qf7 Kf7 22.Nc4 ed3 (23.Bd3 Kf8 24.Bf5 Rc7=; better is 22...Ke6!?–/+) 0–1. bloodymama – jones662, Live Game Caissa's Web, 2005.

4.a4 Nf6 5.b5 =.

4.e3 Bb4?? 5.Bg7 Nf6 6.Bh8+–.

4.a3 Nf6

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

4.e3 a6

5.c4 Ne7 6.d4 g6 7.Nbd2 Qb6 8.a3 a5 9.c5 Qc7 10.Bd3 ab4 11.ab4 Ra1 12.Qa1 Na6 13.b5 Nb4 14.b6 Nc2 0–1. guest1746 – guest1000, ICC, 1999.

5.c4 Nf6 6.Qb3 =.

4.e3 Nd7

5.a3 Ngf6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 c6).

5.b5 Ngf6 =.

5.c4 Bb4?? 6.Bg7 dc4 7.Bc4 +–.

5.c4 Ngf6 6.a3 Be7 7.d4 0–0 8.Nbd2 h6 9.cd5 cd5 10.Bd3 a6 11.0–0 a5 12.ba5 Ra5 13.Qc2 g6 (13...b6 14.Ne5 Ne5 15.de5=) 14.Bg6 (14.Ne5 Qe8+=) 14...fg6= 15.Qg6 Kh8 16.Qh6 Kg8 17.Qg6 Kh8 18.Ng5 Qb6 19.Nf7 Rf7 20.Qf7 Qb2 21.Qe7 Qd2 22.Rfd1 Ra3 23.Qa3 Qe2 24.Rdc1 Nb6 25.Qf8 Ng8 26.Qc5 Bd7 27.Qb6 Bc6 28.g3 Qd3 29.h4 Qg6 30.Ra8 Kh7 31.Qc7 Kh6 32.Qe5 Kh7 33.Rc6! Qb1 34.Kh2 Qb4 35.Qh5 Kg7 36.Qg4 Kh7 37.Rg8 bc6 38.Qg6 1–0. Bonetti,Shane – Jockel (2075), ICC, 2002.

4.e3 f5

5.a3 Nf6= 6.Be2 Be7 7.d3 0–0 8.g3 a5=+ 9.c3 Bd7 10.Nbd2 Be8 11.Ng5 Qc8 12.ba5 c5 13.c4= Ra5 ½–½. Roibal,Felisardo – Magaldi,Nelson (2235), URU–ch prel Roja, 2001.

5.c4 Bb4?? 6.Bg7 dc4 7.Bh8 +–.

5.c4 Nf6= 6.Qb3 Bd6 7.c5 Bc7 8.Be2 0–0 9.0–0+= Ne4 10.d3 Nf6 11.Nbd2 Ng4 12.Rae1 e5 13.h3+– Nf6 14.Be5 Be5 15.Ne5 Nbd7 16.Nef3 Re8 17.Nd4 Nf8 18.Bf3 Ng6 19.a4 Ne5+/– 20.Qc2 Nf3 21.N2f3+– f4 22.ef4 Re1 23.Re1 Bd7 24.a5 Qc8 25.Qe2 Bh3 26.gh3 Qh3 27.Qe6 Kf8 28.Qh3 (28...Kg8 29.Qe6 Kh8 30.a6 ba6 31.Ne5+–) 1–0. SOULESSNURSE – idigVampi, Live Game Caissa's Web, 2005.

5.Be2 Bb4?? 6.Bg7 b6 7.Bh8 +–.

5.Be2 Nf6 6.a3 a5 =.

5.Ne5 Bb4? 6.Qh5 g6 7.Ng6 hg6 8.Qg6 Kd7 9.Bh8 +–.

5.Ne5 Nf6 6.a3 Bd6 7.c4 Nbd7 8.Nd7 Bd7 9.c5 Be7 10.Be2 0–0 11.0–0 b6 12.d4 Qc7 13.Nd2+= a5 14.h3 ab4= 15.ab4 b5 16.Nf3+= Ne4 17.Ne5 Bf6 18.h4 Bh4=+ 19.Bh5 Ra1–/+ Black fights for the Initiative 20.Ba1 Bf6 21.Bf3 Ng5 22.Kh2 Nf7–+ 23.Rh1 Ne5 24.de5 Be5 25.Be5 Qe5 26.Kg1 Ra8 27.Qc2 Ra1 (28.Bd1 Qe4–+) 0–1. Gonzalez Lopez,Vladimir – Rodriguez Cuende,Mario, Asturias–ch Oviedo, 2003.

4.e3 Nf6

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

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

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

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

3.Nf3 f5

4.a3 Nf6 5.e3 e6 6.Be2 a5 7.b5 cb5 8.Bb5 Bd7 9.Be2 Bd6 =.

4.Bc3 Nf6 5.e3 e6 6.Be2 Ne4 7.a3 Nc3 8.Nc3 Bd6 9.0–0 e5 =+.

4.Bd4 Nf6 5.c3 e6 6.Qa4 Bd6 7.e3 Nbd7 8.Bf6 Qf6 9.d4 0–0 –/+.

4.e3 Qd6 5.a3 Nd7 6.Be2 e5 7.c4 Ngf6 8.d4 e4 9.Ne5 Be7 10.0–0 0–0 11.cd5 cd5 (11...Qd5?? 12.Bc4+–) 12.Nc3 Ne5 13.de5 Qe5 14.Qb3 Be6 15.Nb5 d4 16.Bd4 Bb3 17.Be5 a6 (17...Nd7!? 18.Bd6 Kf7=) 18.Nd4+/– g6?? (better is 18...Nd7 19.Bg7 Kg7 20.Nb3 Rac8+/–) 19.Nb3+– Rac8 20.Rac1 Rfd8 21.Rc8 Rc8 22.Rc1 Rc1 23.Nc1 h5 24.Bf6 Bf6 25.Nb3 Bb2 26.a4 Bc3 27.b5 ab5 28.Bb5 b6 29.Kf1 Kf7 30.Nd4 Ke7 31.Ke2 Kd6 32.f3 ef3 33.gf3 Bd4 34.ed4 h4 35.Ke3 g5 36.Kd3 (36.f4 g4+–) 36...g4 37.Ke3 g3 38.hg3 hg3 39.f4 (39.Bf1 Kd5+–) 39...g2 40.Kf2 g1Q 41.Kg1 Kd5 42.Kf2 Kd4 43.Kg3 Ke3 44.Bd7 Ke4 45.Bc8 1–0. Kappel,Ray – Evans,Stanley, 2011–STP–1 Lechenicher SchachServer, 2011.

4.Ne5 Nf6 5.e3 Nbd7 6.Be2 e6 7.a3 Ne5 8.Be5 Bd6 9.d4 0–0 =.

4.e3 Nf6

5.a3 e6 6.Be2 a5 7.b5 cb5 8.Bb5 Bd7 9.Be2 Bd6 =.

5.Be2 e6 6.a3 Nbd7 7.Nc3 (7.Ng5 Qe7+=) 7...e5= 8.h3 (8.0–0 Bd6=) 8...Bd6=+ 9.Na4 Qe7 10.d4 b6 (10...e4 11.Nd2=+) 11.c4 (11.de5 Ne5 12.Ne5 Be5=) 11...e4=+ 12.Nd2 f4 13.c5 (13.0–0 Qe6=+) 13...Bc7 (13...fe3 14.cd6 ed2 15.Qd2 Qd6 16.Rc1–/+) 14.Qb3 b5 (14...0–0 15.0–0–/+) 15.Nc3=+ fe3 16.fe3 Bg3 17.Kd1 0–0 (17...a5 18.ba5 Ra5 19.a4 ba4 20.Ra4 Ra4 21.Qa4=+) 18.Rf1 (18.Bb5 cb5 19.Nde4 Kh8 20.Ng3 Qe3=) 18...Rf7 (18...a5 19.Bb5 cb5 20.Nd5=+) 19.Kc2 (19.a4 ba4 20.Qa4 Qe6=) 19...Nf8 (19...a5 20.ba5 Bc7 21.Kd1=+) 20.a4 ba4 21.Ra4 (21.Qa4 Bd7=+) 21...Rb8 22.Qa2 Be6 (22...Ng6 23.Ra1–/+) 23.Ra7?? (better 23.b5–/+) 23…Qa7–+ 0–1. Kruchinin,Anatoly V (1775) – Losev,Valentin, 7th Nizhnij Novgorod Dub Memorial, 2010.

5.Bf6 gf6 6.Nd4 e6 7.Qh5 Kd7 8.a3 b5 9.a4 Qe8 10.Qe8 Ke8 11.ab5 cb5 12.Bb5 Bd7 13.Ne6 Ke7 14.Nc7 (14…Bb5 15.Na8+– (15.Nb5?! Nc6+–)) 1–0. Wall,Bill (2365) – Duy T, Microsoft Gaming Zone, 1999.

3.Nf3 Bf5

4.a3 f6 5.Nd4 Bd7 6.f4 =.

4.d3 Nd7 5.g3 Ngf6 6.Bg2 e6 7.a3 a5 8.c3 Be7 9.0–0 0–0 10.Nbd2 Qb6 11.Nh4 Bg4 12.d4 (12.h3 Bh5=+) 12...c5 (12...e5!? 13.h3 Be6 14.de5 Ne5=+) 13.h3= Bh5 14.dc5 Nc5 15.Nhf3 (15.g4 Bg6=) 15...Nce4 16.g4 Bg6 17.e3 (17.Ne5 Nd2 18.Ng6 fg6 19.Qd2 Rac8=+) 17...Qc7 18.Rc1 b5 19.Qe2 (19.Nb3 a4 20.Nbd4 e5=+) 19...Nd6 (19...Rfb8 20.Rfd1–/+) 20.Ne5 Nc4 (20...Rfc8 21.Ng6 hg6 22.g5–/+) 21.Ndc4=+ bc4 (worse 21...dc4 22.Ng6 fg6 23.Ba8 Ra8 24.f4+=) 22.Ng6 hg6 23.Rfd1 Rad8 (23...g5 24.Rb1=+) 24.Rd2 Nd7 25.f4 (25.Rb1 Ne5=) 25...g5=+ 26.Rf1 gf4 27.ef4 ab4 28.ab4 (28.cb4? c3 29.Bc3 Qc3–+) 28...Bd6 29.f5 Ne5 30.fe6 (30.g5 g6=+) 30...fe6–/+ 31.Rf8 Rf8 32.Rd1 (32.Qe3 Qc6–/+) 32...Qa7 33.Kh1?? (better 33.Rd4–/+) 33...Rf2–+ 34.Qe1 Rb2 35.Ra1 Ra2 (35...Re2 36.Qg1 (36.Ra7?? Re1 37.Bf1 Rf1 38.Kg2 Rc1–+) 36...Qe3 37.Qe3 Re3 38.Ra6 Re1 39.Bf1 Bb4 40.cb4–+) 36.Rb1 (36.Ra2 Qa2 37.Kg1 Qa7 38.Kh1 Kf7 39.Qf1 Ke8–+) 36...Qf2 37.Qf2 Rf2 38.b5 (38.Ra1 Rc2 39.Ra6 Rc1 40.Bf1 Nf7–+) 38...Nd3 (38...Rc2!? 39.Ra1–+) 39.b6 Rb2 40.Ra1 (40.Rb2 Nb2 41.b7 Na4–+) 40...Rb6 41.g5 Nf4 42.Bf1 (42.g6 Ng6 43.Re1 Nh4–+) 42...Rb3 43.Ra6 Bf8 44.h4 (44.Kh2 Rc3 45.h4 e5–+) 44...Rc3 (better 44...Rb1 45.Kg1 Bc5 46.Kh2 Rf1 47.Rc6 Bg1 48.Kg3 Ne2 49.Kg2 Rf2 50.Kh3–+) 45.h5 (45.Kh2 e5 46.Ra2 Kf7–+) 45…Nh5 0–1. Musa,Abdul Khalid – Sahadi,Ahmad Zulhilmi, Festival Catur Kelantan, 2019.

4.g3 Nd7 5.Bg2 Ngf6 6.0–0 e6 7.e3 Bd6 8.d4 (8.Nh4 Bg4 9.f3 Bh5–/+) 8...0–0 9.Nbd2 Re8 10.c4 e5 (better is 10...Bb4 11.c5 b6–/+) 11.de5 Ne5 12.cd5 cd5 (worse is 12...Nd5 13.e4 Nd3 14.ef5 Nb2 15.Qc2+=) 13.Ne5 Be5 14.Be5 Re5 15.Nf3 Re7 16.Nd4 Bg6 17.Rc1 Rc8 18.Qa4 a6 19.Qa5 Rd7? (19...Qe8 20.Rc8 (worse is 20.Bd5 Rc1 21.Rc1 Re5–/+) 20...Qc8 21.h3= (worse is 21.Bd5 b6 22.Bf7 Bf7 23.Qb6 Ba2–/+)) 20.Bh3 (better is 20.Rc8!? Qc8 21.Bh3+–) 20...Rc1+/– 21.Qd8 Rd8 22.Rc1 Ne8 23.Rc5 Rd6 24.Rc8 (24.Rc8 Kf8 25.a4+/–) 1–0. Ludena,Santiago – Loayza,Antonio, Arequipa Cup 5th rapid, 2005. (=1.Nf3 d5 2.b4 c6 3.Bb2 Bf5)

4.a3 Nd7

5.e3 Qc7 6.Nh4 Bg6 (6...Be6 7.Be2+=) 7.c4 (7.f4 Ngf6=) 7...e6 8.cd5 ed5 9.Nc3 Ngf6 10.Rc1 Be7 11.Be2 0–0 12.0–0 Rae8 (12...Qd6 13.Ng6 fg6 14.b5+=) 13.Ng6 (13.f4 Qd8+=) 13...hg6 (13...fg6 14.Qc2+=) 14.Qc2 Qd6 (14...Bd6 15.f4+=) 15.b5 c5 16.Rfe1 Ne5 17.Qa4 d4 18.ed4 cd4 19.Nb1 d3 20.Be5 Qe5 21.Bd3 Qh5 (21...Qb8!?+/–) 22.Be2+– Qe5 23.Qa7 Bc5?? 24.Qc5 Qb8 25.Qc7 Qa8 26.Bf3 Rc8 27.Qb7 Rc1 28.Rc1 Qa4 29.b6 Re8 30.Qc7 Ne4 31.b7 Qd4 32.b8Q Qf2 33.Kh1 Qe1 1–0. marekt (2365) – poobeshtamil (2125), ICC, 2003.

5.e3 e6 6.Be2 =.

5.e3 Ngf6 6.Be2 =.

5.e3 h6 6.Be2 Ngf6 7.0–0 e6 8.Nd4 Bg6 9.f4 Qb6 10.Nc3 c5 (10...Bd6 11.f5 ef5 12.Nf5 Bf5 13.Rf5=) 11.bc5 Qb2 (11...Bc5 12.Na4 Qc7 13.Nc5 Qc5 14.f5 ef5 15.Nf5 Bf5 16.Rf5+/–) 12.Ra2+/– Bc2?? (better is 12...Qa2 13.Na2 Bc5+/–) 13.Qe1 (13…Qa2 14.Na2+/–; better is 13.Nc2 Qb3 14.Qa1+–) 1–0. Paz01 – Balagan, 2002.

4.a3 e6

5.Nd4 Bg6 6.e3 Nf6 7.Be2 Bd6 8.0–0 Nbd7 9.f4 0–0 10.f5 ef5 11.Nf5 Be5 (11...Bf5 12.Rf5 Qc7 13.h3=+) 12.Be5= Ne5 13.Nd4 Ne4 14.d3 Nd6 15.Nd2 Qe7 16.Qe1 Kh8 17.Qg3 Rae8 18.Rae1 a6 19.N2b3 b6 20.a4 f5 21.a5 ba5 (21...Nb7!?=) 22.Na5+= Nb5 23.Nac6 Nc6 24.Nc6 Qe3 (24...Qe6 25.c4 dc4 26.dc4+=) 25.Qe3+/– Re3 26.Bf3 d4 27.c4 Nd6 28.Be2 f4 29.Nd4 Bd3 30.Bd3 Rd3 31.Ne6 Re8 32.c5 Nc4 (32...Nb5 33.Rf4 g5 34.Rff1+–) 33.Rf4 h6 (33...Rc3+–) 34.Rc4 (34...Kg8 35.Rce4+–) 1–0. b4_player (2200) – stefanj (2025), GameColony.com, 2003.

5.e3 Nf6 6.Be2 Bd6 7.Nh4 Bg6 8.Ng6 hg6 9.c4 dc4 (< 9...Bh2 10.Be5 Ne4 11.Nc3+– (11.Bh2? Qf6 12.Bf3 Qa1–+; < 11.Rh2 Rh2 12.Bh2 Qf6–/+); 9...Rh2?! 10.Rh2 Bh2 11.g3=) 10.Bc4 Nbd7 (10...Bh2? 11.Be5+–; < 10...Rh2 11.Rh2 Bh2 12.g3+=) 11.d4 Qc7 12.h3 b5 13.Be2 a5 14.ba5 Qa5 15.Nd2 0–0 16.0–0 Nb6 17.Qc2 Na4 18.Nb3 Qc7 19.Bc1 ½–½. Eagle_9 – Da Wabbit, ChessWorld.net, 2002.

4.e3

4.e3 (--> 3.e3 Bf5 4.Nf3).

4.e3 e6 5.a3 Nf6 6.d4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 c6 5.d4 e6 6.a3).

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

3.Nf3 f6

4.a3 e5 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.Nf3 c6).

4.d4 a5 5.ba5 Qa5 6.Bc3 Qb6 (6...Qa4 7.Qd3=) 7.Nbd2 Ra3 8.Nb3 Qa7 9.e3 Ra2 10.Ra2 Qa2 11.Bd3 Nh6 (11...e6 12.e4=) 12.0–0+= g6 (12...Bg4 13.Qe2 Qa3 14.Ra1+=) 13.Qe2 Qa3 14.e4 de4 15.Be4 Bg7 16.Qc4 (16.Rb1 Bf5+=) 16...Nf5 17.Bf5 (17.Ra1 Qd6+=) 17...Bf5= 18.Bb4 Qa6 19.Qc5 Bf8 20.Re1 Increases the pressure on the backward pawn (20.Ra1 b6 21.Qc3 Qb7=) 20...Nd7= Black begins to deal mighty blows 21.Re7 (21.Qc3 Nb6 22.Qb2 Nd5=+) 21...Kd8=+ 22.Ba5 b6 23.Bb6 Nb6 24.Qd6 Bd7 25.Qf6 Be7 26.Qh8 Kc7 27.Qh7 Qe2 (28.Nbd2 Nd5–/+) 0–1. Hjortstam,Kurt – Trokenheim,Marek, corr priv, 1992.

4.d4 Bg4 5.e3 (5.a3 a5=) 5...Qb6 (5...e5 6.de5 Bb4 7.c3=) 6.a3 a5 7.c3 (7.c4 ab4 8.Qb3 Bf3 9.gf3 e6=) 7...e5 8.h3 Bf3 9.Qf3 Nd7 (9...ab4 10.ab4 Ra1 11.Ba1 Qa7–+) 10.Bd3 (better is 10.Be2!?=) 10...e4–/+ (10...ab4?! 11.Qh5 (< 11.ab4 Ra1 12.Ba1 Qa7–/+; < 11.cb4 e4 12.Be4 de4 13.Qe4 Ne7–/+) 11...Kd8 12.cb4= (12.ab4? Ra1 13.Ba1 e4–+)) 11.Be4 de4 12.Qe4 Ne7 13.Nd2 0–0–0 (13...ab4 14.Nc4 Qc7 15.Qe6 bc3 16.Nd6 Kd8 17.Nf7 Kc8 18.Bc3=) 14.0–0–0 (better is 14.Nc4 Qc7 15.Na5=) 14...ab4–/+ 15.Nc4 Qc7 16.cb4 Nd5 17.Qf3 (17.Qc2 g6–/+) 17...N5b6 18.Nb6 Nb6 19.Qf5 (19.Rd2 Bd6–/+) 19...Kb8 20.e4 Qf7 21.Qa5 Qc4 22.Kb1 Kc7 23.Rhe1 g6 24.d5 Ra8 25.Rd4 Ra5 26.Rc4 Nc4 27.ba5 Nb2 28.Kb2 Bc5 29.f3 Ra8 30.Rc1? Ra5 31.Kb3 Ra3 32.Kb2 Ra5 0–1. Wartig,Wolfgang – Diener,Rudolf, corr SOK–98–129, 1999.

4.e3 Qb6 5.a3 Bg4 (5...e5 6.c4=) 6.h3 Bf3 (6...Bh5 7.d4+=) 7.Qf3+= Nd7 (7...e5 8.d4 Nd7 9.c4+=) 8.d4 (8.Bd3 Nh6 9.c4+=) 8...a6 (8...e5!?+=) 9.Bd3+/– Qc7 (9...0–0–0!?+/–) 10.c4 (better is 10.Qh5 Kd8 11.0–0+– (11.Bh7?! e6+=)) 10...b5? (10...dc4 11.Qh5 Kd8 12.Bc4 g6+–) 11.cd5 Rc8 12.dc6 (12.Qh5!? Kd8 13.dc6 Qc6+–) 12...Qc6 13.Nd2 (13.Be4 Qe6 14.0–0 Nh6+–) 13...Qf3 14.Nf3 e6 15.0–0 Bd6 16.Rac1 Ne7 17.Rc8 Nc8 18.Rc1 Ndb6 19.Nd2 f5 20.d5! ed5 21.Bg7 Rg8 22.Bd4 Nc4 23.Nc4 dc4 24.Bf5 Ne7 25.Bh7 Rf8 26.Rd1 Kf7 27.f4 Nc6 28.Bb6 Ke6 29.Be4 Ne7 30.g4 Rh8 31.Kg2 Rb8 32.Bd4 Rc8 33.f5 Kd7 34.f6 Nc6 35.Bf5 Kd8 36.Bb6 (36...Ke8 37.Rd6+–) 1–0. Fabbri (1735) – Mokolato, internet, 2006.

4.g3 Bf5=+ 5.Bg2 e6 6.a3 Nbd7 (6...c5 7.bc5 Bc5 8.Bd4=+) 7.0–0= Bd6 8.d3 (8.Nh4 Be4=+) 8...0–0 (8...a5 9.e4 de4 10.de4 Ne4 11.Bg7–/+) 9.Nbd2 (9.Nh4 Bg4=+) 9...a5=+ 10.Rb1 (10.ba5 Qa5 11.Nb3 Qa4=+) 10...ab4 11.ab4 Qe7 (11...Qc7 12.Nd4=+) 12.c3 (12.b5 e5=+) 12...h6 (12...e5 13.c4–/+) 13.Qb3 (13.Nd4 Bg4=+) 13...e5 14.Nh4 (14.Ra1 b6=+) 14...Bh7 (14...Be6 15.Nhf3–/+) 15.Rfe1 (15.Ra1 e4 16.de4 Ne4 17.Ne4 Be4 18.Ra8 Ra8–/+) 15...e4–/+ Black gets the initiative 16.de4 de4 17.Rbd1 (17.Nc4 g5 18.Nd6 Qd6–+) 17...g5–+ 18.Nc4 (18.Nhf3 ef3 19.ef3 Qd8–+) 18...Bc7 19.Bc1 (19.Nf3 ef3 20.ef3 Qd8–+) 19...b5 20.Ne3 (20.Na5 Ba5 (20...gh4?! 21.Nc6 Qe8 22.Bh6=+) 21.ba5 Ra5–+) 20...gh4 21.Bh3 hg3 22.hg3 Bb6 23.Kg2 Ne5 24.Nf5 Bf5 25.Bf5 Kg7 26.Rh1 Rh8 27.Rh4 e3 28.fe3 Nc4 29.Bd3 Ne3 30.Be3 Qe3 31.Rf1 Qe6 32.c4 Be3 33.Qc3 Bg5 34.Rh5 bc4 35.Bc4 Qe3 36.Qb2 Qd2 37.Qe5 Rae8 38.Qf5 Re2! 39.Kh1 Re7 40.Rh2 Qd7 41.Qf3 Rhe8 42.Qc3 Re3 43.Qb2 Re1 44.Qf2 Rf1 45.Qf1 Qd6 (46.Kg2 Qd2 47.Kg1 Qb4–+) 0–1. Cingari,Julio – Jarrouj,Jackson, Feria del Orinoco op, 2001.

4.d4 e5

5.a3 e4 6.Nfd2 a5 7.b5 cb5 8.e3 b4 9.Bb5 Nc6 10.ab4 Bb4 11.c3 Be7 12.c4 Kf8 (12...Be6 13.c5=) 13.cd5 Qd5 14.Nc3 Qg5 15.Kf1 f5 16.Nc4 Be6 17.d5 Rd8 18.Qb3 (18...a4 19.Ba4 Bd5 20.Nd5 Rd5 21.Qb7+=; < 18.Bc6 bc6 19.Ra5 Nf6–/+). NZ cricketer – Klaus Behrmann, ChessWorld.net, 2005.

5.de5 Bb4 6.c3 =+.

5.de5 Bb4 6.Nbd2 Qa5 7.e3 Bg4 8.ef6 (8.Be2 Bf3 9.Bf3 Nd7 10.Bh5 Ke7 11.ef6 Ngf6+=) 8...Nf6+= 9.Be2 Bf3 10.Bf3 Nbd7 11.a3 Bc3 12.Bc3 Qc3 13.0–0 0–0 14.g3 (14.Rb1 b5 15.e4 d4+=) 14...Ne5–/+ 15.Bg2 Rae8 16.Nf3 Nf3 17.Bf3 Ne4 18.Be4 Re4 19.Qd3 Qc5 20.Rfc1 Rfe8 21.Rab1 (better is 21.c3!?–/+) 21…Re3!–+ (21...Re3 22.Qf1 R3e7–+) 0–1. Perez Cortes – Steuer, email 4AMM–02, 1997.

4.e3 e5

5.a3 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 c6 5.Nf3).

4.e3 Bg4

5.Be2 Nd7 6.Nh4 (6.0–0 e5 7.a3 Bd6=) 6...Be6 (6...Be2 7.Qe2 Nh6 8.a3=) 7.0–0+= g6 (7...Bf7 8.f4+=) 8.f4 (8.d4 Qb6+=) 8...Bf7 (8...Bg7 9.f5 Bf7 10.Bd4+=) 9.b5 (9.Nf3 Bg7+=) 9...c5 (9...cb5 10.Bb5 a6 11.Be2+=) 10.Qe1 (10.a4 Qa5+=) 10...Qb6 (10...e5 11.fe5 Ne5 12.Nf3+=) 11.a4 a5 12.Nc3 Nh6 13.Qg3 Bg7 14.e4 de4 15.Ne4+= 0–0 16.Qe3 Rac8 17.Rae1 e5 18.fe5 Ne5 19.Nf6! Bf6 20.Be5 Be5 21.Qe5 c4 22.Kh1 Rfe8 23.Qf4 Nf5? 24.Nf5+– gf5 25.Bc4! Bc4 26.Re8 Re8 27.Qc4 Qe6 28.Qe6 Re6 29.d4 Kg7 30.c4 Re4 31.Rd1 Kf6 32.Kg1 Ke6 33.Kf2 Kd6 34.Kf3 b6 35.g3 h5 36.h3 Ke6 37.Rd3 Kd6 38.Rd2 Re1 39.Rc2 Rf1 40.Ke2 Rh1 41.c5 Kc7 42.cb6 Kb6 43.Rc6 Kb7 44.Kf3 h4 45.Rg6 Rh3?? 46.Kg2 (46...Rg3 47.Rg3 hg3 48.Kg3+–) 1–0. Machete (2225) – tossy (2020), ICC, 2003.

5.Be2 e5 6.a3 =.

5.h3 Bh5 6.c4 e6 7.a3 Bd6 8.Nc3 Ne7 9.Be2 Nd7 10.Qb3 0–0 11.d4 Bg6 12.b5 Rc8 13.a4 Qa5 14.0–0 Bf7 15.Ba3 Ba3 16.Qa3 c5 17.dc5 Rc5 18.Rac1 Rfc8 (worse is 18...dc4 19.Ne4 Rc7 20.Qe7+/–) 19.Nd4 Qd8 20.cd5 ed5 21.Rfd1 Qe8 22.Na2 Bg6 23.Bg4 Rc1 24.Rc1 Rc1 25.Qc1 f5 26.Bd1 Qb8 27.Nb4 Qd6 28.Nd3 Ne5 29.Nf4 Nc4 30.Bc2 Qb4 31.Qa1 Qb2 32.Qb2 Nb2 33.Kf1 Bf7 34.Ke2 h6 35.h4 g6 36.Bb3 Nc4 37.Nd3 1–0. Poleschi,Ricardo – Blanken,Timo (2220), corr ICCF EM/J50/P072 ICCF Email, 2001. (=1.Nf3 c6 2.b4 d5 3.Bb2 f6)

3.Nf3 Nf6

4.a3 Qb6 5.e3 (5...Bg4 6.h3 Bf3 7.Qf3=). pierre (2085) – klim_bes, internet, 2007.

4.a3 e6 5.e3 Bd6 6.Be2 0–0 7.0–0 Nbd7 8.Nc3 Qc7 9.Rb1 Ne5 (9...e5 10.Nh4=+) 10.Ne5= Be5 11.f4 Bd6 12.Qe1 e5 13.fe5 Be5 14.Qh4 Re8 15.Rf2 Re6 16.b5 Bd7 17.bc6 Bc6 18.Rbf1 d4 19.ed4–/+ Bd4?? 20.Qd4+– Rd8 21.Qa7 Rd2 22.Nb5 Bb5 23.Bb5 Rc2 24.Rc2 Qc2 25.Qa8 Ne8 26.Be8 1–0. b4_player (2070) – pav777 (1970), GameColony.com, 2002.

4.a3 g6 5.e3 Bg7 6.c4 0–0 7.d4 Bg4 8.Be2 h5 (8...Bf3!? 9.gf3 Nbd7=) 9.Nbd2+= Nbd7 10.0–0 e5? (10...a5!?+=) 11.de5+/– Ne4 12.cd5 cd5 13.h3 Bf3 14.Nf3 (14.gf3?! Nd2 15.Qd2 Ne5+=) 14...Re8 15.Qd5 Ng5?? (better is 15...Ne5 16.Qe4 Nf3 17.Qf3 Bb2+–) 16.Ng5 Qg5 17.Qd7 Be5 18.Be5 Re5 19.Qb7 Rae8 20.Bf3 Rf5 21.Rfd1 Re7 22.Qb8 Kg7 23.Qg3 Qf6 24.Rd4 Rg5 25.Qf4 Rf5 26.Qd6 Re6 27.Qd8 Rg5 28.Qf6 Rf6 29.Kf1 Re5 30.Rc1 g5 31.Bh5 Ref5 32.Bf3 Rf3 33.gf3 Rf3 34.Kg2 Rf6 35.Rc7 Kg6 36.Ra7 Rf5 37.Rdd7 f6 38.Rg7 (38.Rg7 Kh5 39.Rh7 Kg6 40.Rag7) 1–0. Fournier,Frederic (1735) – turbo, 5 min +0s chess17.com, 2007.

4.a3 h6 5.e3 Bf5 6.Be2 e6 7.0–0 Bd6 8.Nd4 Bh7 9.d3 0–0 10.f4 Nbd7 11.Nd2 e5 12.fe5 Ne5 13.Nf5 Bc7 14.a4 b6 15.b5 c5 16.a5 Qd7 17.Nh6! gh6 18.Rf6 Kh8? (better is 18...Qb5!? 19.Be5 Be5+/–) 19.Rh6 Rg8 20.Qf1 Rg7 (20...Rae8+–) 21.ab6 Bd6 (21...Qb5 22.bc7 Qb2+–) 22.Ra7 Ra7 23.ba7 Rg8 (23...Qa7 24.Rd6 Qe7+–) 24.Qf6 1–0. kamret (2185) – manchild11 (1750), GameColony.com, 2003.

4.a4 a6 5.e3= Qb6 (5...e6 6.Ba3=) 6.b5 (6.Nc3 Qb4 7.Ba3 Qa5=) 6...ab5 7.ab5 Ra1 8.Ba1 Qa5 (8...Nbd7 9.c4=) 9.Bc3+= Qa2 10.Be2 g6 (10...Nbd7 11.0–0+=) 11.0–0 Bg7 12.Bb4 (12.Bd4 Qa5 13.Nc3 Nbd7 14.bc6 bc6+=) 12...Nbd7 (12...Qa4!? 13.Bc3 Qa2=) 13.Nc3 (13.bc6 bc6 14.Nc3 Qa8+=) 13...Qa7 (13...Qb2!? 14.Qb1 Qb1 15.Rb1 c5+=) 14.d4+– Bf8 (14...Nb6 15.Qa1 Qa1 16.Ra1+–) 15.Qb1 (15.bc6!? bc6 16.Qa1 Qa1 17.Ra1+–) 15...e6+– 16.Bf8 Kf8 17.Qb2 Qb6 18.Ra1 Kg7 19.Na4 Qc7 20.c4 (20.g3 Re8+=) 20...Nb6 (20...cb5!? 21.Qb5 dc4+=) 21.Nb6+– Qb6 22.c5 Qc7 23.bc6 bc6 24.Qb6 Qb6 25.cb6 Bb7? (better 25...Nd7 26.Ra7 Nb6+–) 26.Ra7+– Rb8 27.Ne5 Kf8 (27...h5 28.f3+–) 28.Ba6 (28.f3!? h5+–) 28...Ba6 29.Ra6 Ke8 (29...Rb7 30.f3 Ne8+–) 30.Nc6 Rb7 31.f3 (better 31.Ra8 Kd7 32.Ne5 Kd6 33.Ra7 Rb6 34.g4+–) 31...Nd7 (31...Kd7 32.Ne5 Kc8 33.Nf7 Rb8 (33...Rf7?? 34.Ra8 Kb7 35.Ra7 Kb6 36.Rf7+–) 34.b7 Kb7 35.Re6 Ng8+–) 32.Ra8 Nb8 33.Rb8 Rb8 34.Nb8 Kd8 35.Na6 Kc8 36.Nc5 h5 37.Kf2 1–0. GuestYGNN – kokoguest, freechess.org, 2019.

4.a4 e5 5.Be5 Bb4 6.e3 0–0 7.Bc3 Bd6 8.Be2 Bg4 9.h3 Bf3 10.Bf3 Nbd7 11.0–0 Qc7 12.d4 Rfe8 13.Qd3 Ne4 14.Bb2 Ndf6 15.Nd2 Rac8 16.Rfc1 c5 (16...Bh2 17.Kf1+=) 17.c4= Bh2 18.Kf1 Qa5 19.Nb3 (better is 19.Rc2!? cd4 20.Bd4= (worse is 20.Qd4 Be5 21.Qd3 Bb2 22.Rb2 Red8+=)) 19...Qb4–/+ 20.Ke2 cd4 21.cd5 de3 22.Be4 Ne4 23.fe3 Rc1 24.Rc1 Ng3 25.Kf3 Qh4 (25...Qa4?! 26.Qd4 Qd4 27.Bd4= (27.ed4? Nf5–+)) 26.Rc4 Qg5 27.Rg4? (better is 27.Kf2–/+) 27...Re3!!–+ 28.Qe3 Qd5 29.Re4 f5 30.Nd2 0–1. SuperDave – Stefan_NL, August, 2000.

4.d4 Bf5 5.Nbd2 h6 6.c3 Nbd7 7.e3 e6 8.Nh4 Bh7 9.Bd3?? (better is 9.Be2+=) 9...Bd3–+ 10.Nhf3 Bd6 11.e4 (11.Nb3 Bc4–+) 11...de4 12.Ne4 (12.Ng1 Nd5 13.Ne2 Qg5–+) 12...Be4 13.0–0 Bf3 (better is 13...Ng4 14.Re1 Bf3 15.Qf3 Nh2 16.Qe4–+) 14.gf3 (14.Qf3 Nd5–+) 14...0–0 (14...Nd5 15.f4–+) 15.a3 (15.Re1 Nd5 16.Re4 N7f6–+) 15...Nd5 16.f4 Nf4 17.Bc1 (17.Qg4–+) 17...Qg5 18.Qg4 Qg4 19.Kh1 Qg2 0–1. jmcauley (1800) – dsteel (2205), net–chess.com, 2013.

4.d4 Bg4 5.Nbd2 e6 6.c3 Bd6 7.g3 0–0 8.Bg2 Nbd7 9.h3 Bh5 10.g4 Bg6 11.e3 Ne4 12.h4 f5 13.Ne4 fe4 (13...de4?! 14.Ng5 Qf6 15.Qb3 fg4 16.Qe6 Kh8 17.Qf6 Nf6 18.Ne6+=) 14.Nd2 Qf6 15.Qe2 e5 16.h5 Bf7 17.0–0–0 a5 18.a3 ab4 19.cb4 b6 (19...ed4 20.ed4 Bf4 21.f3 ef3 22.Bf3–+) 20.g5? (20.de5 Be5 21.Ne4 de4 22.Rd7–/+) 20...Qg5–+ 21.Rdg1 Qf6 22.f3 ef3 23.Nf3 c5 24.Bh3? (24.de5 Ne5 25.bc5 bc5–+) 24...Be6 (better is 24...Bh5!? 25.de5 Ne5 26.Be6 Qe6 27.Rh5 Rf3 28.Be5 Be5 29.Qf3 Ra3 30.Rf5–+) 25.Be6 Qe6 26.Ng5 Qf5 27.Rg2?? (27.e4 Qf6 28.bc5 bc5 29.Qg4+=) 27...cb4–+ 28.Rhg1 (28.e4 de4 29.h6 Rfc8 30.Kd1–+) 28...Rac8 29.Kd1 Qb1 (29...Qb1 30.Kd2 Qb2 31.Ke1 Qc1 32.Qd1 Qe3 33.Re2 Qg1 34.Kd2 Rf1 35.Qb3 Qd4 36.Qd3 Qb2 37.Qc2 Rc2 38.Kd3 Qc3) 0–1. Hedlerfog,Robert – Astroem,Lars (1795), Politiken Cup, Copenhagen DEN, 2010. (=1.d4 d5 2.b4 Nf6 3.Nf3 c6 4.Bb2)

4.d4 g6 5.e3 Bg7 6.Bd3 Ne4 7.0–0 0–0 8.Nbd2 f5 9.c4 a6 10.Rc1 e6 11.Ne1 b5 12.c5 a5 13.f3 Nd2=+ 14.Qd2 ab4 15.Nc2 Na6 16.Ra1 Nc5!–/+ 17.Nb4 Nd3 18.Nd3 Rf7 19.Nc5 h5 20.Qc2 Bh6 21.Qd3 Rfa7 22.a3 Qf6 23.f4 Bf8 24.Rfc1 Bd6 25.Ra2 g5–/+ 26.fg5 (26...Qg5 27.Rc2–/+). DrSub (1620) – lilgia, internet, 2007.

4.Ne5 Bf5 5.f3 e6 6.d3 Bd6 7.d4 0–0 8.g4 Bg6 9.Ng6 hg6 10.a3 Bf4 11.Qd3 Bg5 12.h4= Bf4 13.Nd2 Re8 14.e3 Bg3 15.Kd1 e5 16.h5 gh5 17.gh5 e4 18.Qe2 b6 19.Bg2 Re7 20.f4+– c5 21.Rh3 Bf4 22.ef4 Nc6? 23.dc5 bc5 24.bc5 Rb8 25.Rb1 Nd4 26.Bd4 Rb1 27.Nb1 Qb8 28.Nc3 Rd7 29.h6 Ne8 30.h7 Kh8 31.f5 f6 32.a4 Qb4 33.Qd2 Re7 34.Nd5 Qd2 35.Kd2 (35...Re5 36.Nf4 e3 37.Ke2 g5 38.Ng6 Kg7 39.h8Q Kf7 40.Qf8#) 1–0. Matthias – Falcor, mySchach.de, 2004.

4.a3 a5

5.ba5 Ra5 6.e3 Bg4 7.d3 e6 8.Nbd2 Bd6 9.Nb3 (9.h3 Bf3 10.Qf3 Nbd7=+) 9...Ra8 10.Be2 Nbd7 11.0–0 c5 (11...0–0 12.a4=+) 12.Ng5 (12.h3 Bh5=) 12...Be2=+ 13.Qe2 0–0 14.f4 Qc7 15.c4 Rfe8 16.Rac1 (16.Qf2 e5=+) 16...dc4 (16...e5 17.cd5 ef4 18.e4=+) 17.Rc4 e5 18.fe5 (18.d4 ef4 19.dc5 Be5–/+) 18...Be5 19.Be5 Qe5 20.Ne4 Ne4 21.Re4 Qc3 22.Nd2 Re4 23.Ne4 Qa3 24.Nd6 (24.Qh5!? Qb3 25.Nd6–/+) 24...Ne5–/+ 25.d4 cd4 26.ed4 Qd6 27.Qe5 (27.de5 Qd4 28.Qf2 Qd5–/+) 27...Qe5 28.de5 b5 29.Rb1 Rb8 30.Rb4 Kf8 31.Kf2 Ke7 32.Ke3 Kd7 33.Kd3 Kc6 34.Kd4 (34.Rg4 g6–/+) 34...Ra8 35.Rb2 Ra4 36.Kd3 Kc5 37.Rf2 Ra7 38.Rf5 g6 (38...g6 39.Rf6 b4–+) 0–1. Ventimiglia,Charles (1815) – Koh Kah Huat (1700), IECC, 1998.

5.b5 cb5 6.e3 Bd7=.

5.b5 c5 6.e3 b6 (6...e6 7.c4=) 7.Be2 (7.c4 e6+=) 7...Bb7 (7...e6 8.0–0=) 8.0–0 Nbd7 9.Re1 (9.c4 dc4 10.Bc4 e6=) 9...e6 10.Nc3 (10.c4 dc4 11.Bc4 Bd6=) 10...Qc7 11.d3 Bd6 12.Qd2 0–0–0 (12...0–0 13.Na4=+) 13.Na4 h5 14.Rad1 (14.h3 e5=) 14...e5 (14...g5 15.Ng5 Bh2 16.Kh1=+) 15.c4 d4 16.Ng5 Rdf8 (16...Rhf8 17.Bf3=) 17.Bf3 Bf3 (17...e4 18.Be4 (< 18.de4 Bh2 19.Kh1 de3 20.Re3 Bf4–/+) 18...Bh2 19.Kh1=) 18.Nf3+= (< 18.gf3 Rh6=+) 18...e4? (better is 18...Kb8+=) 19.de4+– Bh2? (better is 19...Ne4 20.Qc2 f5 21.ed4 cd4+–) 20.Nh2 Ne4 21.Qc2 Nf2 (21...Nc3 22.Bc3 dc3+–) 22.Qf2 (22...f6 23.ed4+–) 1–0. b4_player (2225) – chefpap (2000), GameColony.com, 2003.

5.c4? ab4 6.cd5 cd5 (6...Nd5!? 7.e4 Nf6–/+) 7.ab4= Ra1 8.Ba1 Bf5 (8...e6 9.Qb3=) 9.e3 (9.Bf6 ef6 10.Qa4 Qd7=) 9...Qb6 (9...Nfd7 10.Nc3 Bg4 11.Nd5+=) 10.b5 (10.Qa4 Nc6 11.Bf6 gf6=) 10...Nbd7 11.Be2 e6 12.0–0 Bd6 13.Nc3 (13.Bf6 gf6 14.Nd4 Be4=) 13...0–0 14.Nh4 Be4 15.d3 Bg6 16.Ng6 hg6 17.Qb3 Ra8 18.Bb2 Nc5 19.Qc2 Qc7 20.g3 Nfd7 21.Rc1 Nb6 22.Nb1 Ra2 23.Nc3 Ra8 Twofold repetition 24.Bd1 Nca4 25.Na4+/– Qc2 26.Bc2 Na4 27.Ba4 Ra4 28.Rc8 Kh7 29.Rd8 Rb4 30.Rd6 Rb2 31.Rb6 g5 32.Rb7 Kg6 33.h3 d4 34.ed4+– Rb3 35.b6 Rd3 36.Rd7 Rb3 37.b7 f5 38.Kf1 Rb2 39.Ke1 Kf6 40.Kd1 g6 41.Kc1 Rb6 42.Kc2 Rb4 43.Kc3 Rb1 44.Kc4 e5 45.d5 e4 46.Kd4 Rb2 47.Rc7 Rb4 48.Kc5 Rb1 49.Rc6 (49.Rc6 Ke7 50.Rb6 Rb6 51.Kb6+–) 1–0. Tomb,M (2185) – Moisan Plante,MO (2135), Montreal op, 2002. (=1.a3 Nf6 2.b4 d5 3.Bb2 c6 4.Nf3 a5)

5.c4? dc4 6.ba5 Ra5 7.Bc3 –/+.

5.e3!? =.

4.a3 Nbd7

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

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

5.g3 a5 6.c3 (6.ba5 Qc7=+) 6...e5–/+ 7.d3 Bd6 8.Bg2 0–0 9.0–0 b6 (9...Re8 10.Nbd2=+) 10.e4 (10.c4 Qe7=+) 10...de4 (10...ab4 11.ab4 Ba6 12.ed5 cd5 13.Re1=+) 11.de4=+ Qc7 12.Re1 (12.Qc2 b5=+) 12...Rd8 (12...b5 13.Nbd2–/+) 13.Qb3 b5 14.c4 bc4 15.Qc4 Ba6 16.Qc3 (16.Qb3 Rab8–/+) 16...Rab8 (16...Rdb8 17.Rc1 c5 18.ba5 Ne4 19.Qc2–/+) 17.Rc1 c5 (17...ab4?! 18.Qc6 ba3 19.Qc7 Bc7 20.Ba3=) 18.Nbd2 (18.Qb3 Qb6–/+) 18...Qb7 19.Nb3 (19.b5 Bb5 20.Qa5 Bc7–/+) 19...cb4–+ (19...Ne4 20.Qe3 cb4 21.Na5+=) 20.Qc6 ba3 (20...Qc6 21.Rc6 ba3 22.Ba3 Ba3 23.Ra3–+) 21.Ba3 (21.Qb7 Bb7 22.Ba3 Bb4–+ (worse 22...Be4 23.Bd6 Rb3 24.Nd2 Bg2 25.Nb3+=; 22...Ne4?! 23.Na5 Ba3 24.Ra3–/+)) 21...Ba3 (21...Qc6 22.Rc6 Ba3 23.Ra3–+) 22.Ra3 (22.Qb7 Bb7 (22...Rb7?! 23.Ra3 Rb4 24.Ra5=+) 23.Ra3 Ne4 24.Na5 Bd5–/+) 22...Qc6 23.Rc6 Bb5 (23...a4 24.Nbd2 Be2 25.Rc7–+) 24.Rc1 (24.Rc7 a4 25.Nbd2 Rbc8 26.Rc8 Rc8–+) 24...a4 25.Nbd2 Rdc8 26.Rca1 Rc2 (26...Rc5 27.Rb1–+) 27.Bf1 Bf1 28.Nf1 (28.Kf1 Nc5 29.R1a2 Rc1 30.Kg2 Nfd7–+) 28...Ne4 (28...Nc5!? 29.Ne3 Rcb2 30.Nc4–+) 29.Ne3 (29.Ne3 Rf2 30.Ng5 Ng5 31.Kf2 Ne4 32.Kf3 Nd2 33.Kf2–+). Ossa,Orlando (2260) – Gallego,Andres Felipe (2400), GRUPO A MASCULINO, 2008. (=1.a3 Nf6 2.b4 d5 3.Bb2 c6 4.Nf3 Nbd7)

5.g3 Qc7 6.d4=+.

4.a3 Bf5

5.d3 a5 6.c3 g6 (6...e6 7.Nh4=+) 7.Nbd2 Bg7 8.Qc2 0–0 (8...ab4 9.ab4 Ra1 10.Ba1=) 9.e4 de4 (9...Bg4 10.Be2=) 10.de4 Bg4 11.Be2 c5 (11...Nh5 12.0–0=) 12.b5 Nbd7 13.Nc4 Nh5 14.h3 (14.Ne3 Bf3 15.Bf3 Nf4=) 14...Be6 15.g3 (15.0–0 Nf4=) 15...Qc7 16.Bf1 (16.Ncd2 Nhf6=) 16...Rad8 17.Ne3 c4 18.Nd4 Ne5 19.0–0–0 (19.Rd1 Bd7=) 19...Bh6 20.Rg1 (20.Qe2 Nd3 21.Kb1 Qb6=) 20...Nf6 (20...Qc8 21.f4 Bh3=) 21.Kb1 (better 21.f4=) 21...Be3–/+ 22.fe3 Rd7 (22...Ne4!? 23.Bg2 Ng3 24.Ne6 fe6–/+) 23.g4=+ Rfd8 24.Be2 (24.Qg2 g5=+) 24...Nd3–/+ 25.Ne6 (25.Qa4 Qe5 26.Bd3 cd3 27.Qa5 Qe4–+) 25...fe6 26.Bf3 (26.Bd3 cd3 27.Qb3 Qd6–/+) 26...Qe5 27.Qa4?? (27.a4 Ne4 28.Be4 Qe4–/+) 27...Rc8 (better 27...Nb2 28.Rd7 Na4 29.Rd8 Kf7–+) 28.Qc2 (28.Qa5!? Ne4 29.Rgf1–/+) 28...Ne4 29.Be4 Qe4 (29...Nb2?? 30.Rd7 (30.Kb2?! Qb5 31.Ka2 Rd6+–) 30...Nd3 31.Rd4 Qb5 32.Ka2+–) 30.Bc1 Rf8 31.Rdf1 Rdd8 32.Rf4 (32.Ka1 Qe5–+) 32...Rf4 (32...Qd5!? 33.Rf8 Rf8 34.Qa4–+) 33.ef4–/+ Qd5 34.a4 Qf3 35.Qg2 Qg2 36.Rg2 Nc5 37.f5? (better 37.Re2!?–/+) 37...Na4–+ (37...gf5?! 38.gf5 Kf7 39.fe6 Ke6 40.Rg4 Na4 41.Rc4–/+) 38.Kc2 Rd3 (worse 38...gf5 39.gf5 Kf7 40.fe6 Ke6 41.Rg4–+) 39.Bd2 Rh3 (39...ef5 40.gf5 Rh3 41.fg6 hg6 42.Rg4–+) 40.fe6 Nc5 41.Re2 Rh4 42.Bg5 (42.Re5 Nb3 43.Bg5 Rg4 44.Be7 Rg2 45.Kd1 Rg1 46.Kc2 Rc1 47.Kb2 Rf1=+) 42...Rg4 43.Be7 Re4 44.Re4 Ne4 45.Bd8 Kf8 46.Ba5 (46.e7 Ke8 47.Ba5 Ke7–+) 46...Ke7 47.Kd1 Ke6 48.Ke2 (48.Bb4 b6–+) 48...Nd6 (48...b6 49.Bb4–+) 49.Ke3 (49.b6 g5–+) 49…Kd5 0–1. Siluk,Zygmunt (2040) – Chojnowski,Marcin (2145), MPN, 2007.

5.d3 e6 6.Nbd2 a5 7.c3 (7.e4 Bg4 8.ba5 Qa5=) 7...h6 (7...Bd6 8.Nh4=+) 8.g3 (8.Qc2 Nbd7=) 8...Bd6=+ 9.Bg2 0–0 10.0–0 Nbd7 11.e4 (11.Nd4 Bg6=+) 11...Bh7 (11...de4 12.de4 Be4 13.Ne4 Ne4 14.Nd4=+) 12.Re1 Be7 (12...e5 13.ed5 cd5 14.c4 ab4 15.ab4 Ra1 16.Ba1=+) 13.e5 Ne8 14.Qe2 Qb6 15.d4 Nc7 16.Nb3 ab4 17.ab4 Qb5 18.Qb5 Nb5 19.Na5 Ra7 20.Bf1 Re8 (20...Nb8 21.Nb3 Na6 22.Bb5 cb5 23.Ra5=) 21.h4 Bf5 22.Be2 (22.Bb5 cb5 23.Nc6 Ra4 24.Ne7 Re7=) 22...Bg4 (22...Nb8 23.Bb5 cb5 24.Ra3=) 23.Kg2 (23.Bb5 cb5 24.Nh2 Bf5+=) 23...Nb6 24.Bf1 (24.Bb5!? cb5 25.Nh2=) 24...Rea8=+ 25.Rec1 (25.Bd3 Bh5=+) 25...f6 (25...Bf5!?–/+) 26.ef6= gf6 27.Nd2 (27.Nh2 Bh5=) 27...Nc7 28.f3 Bh5 29.Ra3 e5 30.de5 (30.Rca1 Kf8=) 30...fe5=+ 31.Rca1 Bf8 32.Nab3 Ra3 33.Ra3 Na4 34.Ba1 Bf7 35.Ra2 d4 (35...b5 36.Bd3=+) 36.cd4 Nd5 (36...Bb4 37.Bc4 Nd5 38.Kf2 Bd2 39.Rd2–+) 37.de5= Nb4 38.Ra3 b5 39.Kh1 (39.Nd4 Nd5 40.Ra2 Ne3 41.Kf2 Nd1 42.Ke1 Ba2 43.Kd1 Bd5–/+) 39...Na6–/+ 40.Ra2 N6c5 41.Bh3 Bd5 (41...Nb3 42.e6 Na1 43.ef7 Kf7 44.Ra1–/+) 42.Nc5 Ba2 43.Nd7 Kf7 44.e6 Be6 45.Ne5 Ke7 46.Nc6 Kd6 47.Be6 Nc5 (47...Ke6?! 48.Nd4 Kd5 49.Nb5=; 47...Kc6?! 48.Bf5 Nc5 49.Bc3–/+) 48.Bc3 Ne6 (48...Ke6?! 49.Nd4 Kd5 50.Nb5=; 48...Kc6?! 49.Bf7–/+) 49.Nb4 Kc5 50.Kg2 Ra3 51.Bb2? (better 51.Nd3!? Kd5 52.Ne4–/+) Kb4–+ (51...Kb4 52.Ba3 Ka3–+) 0–1. pcmvr – idontcastle, net–chess.com, 2018.

5.d3 e6 6.Nh4 Bg6 7.Ng6 hg6 8.Nd2 Nbd7 (8...a5 9.c3=) 9.e4= e5 (9...Bd6 10.Nf3 Qc7 11.Qe2=) 10.ed5 cd5 11.g3 (11.d4 e4=) 11...Bd6 12.Bg2 Qc7 13.c4 d4 14.c5 Be7 15.Nc4 Rc8 16.Qf3 (better is 16.Qa4 b6 17.c6+=) 16...Nc5?? (better is 16...b5 17.cb6 ab6=) 17.bc5+– Qc5 (17...Bc5 18.Qb7 Qb7 19.Bb7+–) 18.Qb7 0–0 (18...Nd7 19.f4 Rb8 20.Qd5+–) 19.0–0 Rc7 20.Qb4! Nd7 (20...Qb4 21.Ne5 Deflection) 21.Qc5 Bc5 22.f4 Re8 (22...ef4 23.Rf4 Rd8 24.Bd4+–) 23.fe5 (23.Rae1!? Rb8 24.fe5 Nb6 25.Nb6 Rb6+–) 23...Ne5 24.Ne5 Re5 25.Rf4 Re2 26.Rb1 (26.Bd4 g5 27.Rg4 f5 28.Bc5 fg4 29.Bd5 Kh7+–) 26...Bb6 (26...Bd6 27.Re4 (27.Rd4?! Rcc2 28.Bf1 Bc5+=) 27...Re4 28.Be4+–) 27.Bd4 Rcc2 28.Bd5 (better is 28.Bf3 g5 29.Be2 gf4 30.Bb6 ab6 31.Kf2 fg3 32.hg3+–) 28...Ba5 (28...g5 29.Rg4 Bd4 30.Rd4 Kh7+–) 29.Rb8 Kh7 (29...Rc8 30.Bf7 Kf8 31.Bc5 Re7 32.Rc8 Bd8 33.Rd8) 30.Rh4 1–0. Ezzedine,Aboudaher – Said,Hassan, Beirut op 3rd, 2009.

5.Nh4 Bg6 6.e3 Nbd7 7.Be2 a5 8.b5 e6 9.0–0 Bd6 10.f4 0–0 11.Ng6 hg6 12.Qe1 e5 13.fe5 Ne5 14.Qh4 Ne4= 15.Qd8 Rad8 16.Bd4 c5=+ 17.Bb2 b6 18.a4 Nf6 19.Nc3 d4 20.Nd1 Bc7 21.ed4+= cd4 22.Nf2 Rfe8 23.Rae1 Re7 24.Bd1 (24.Ba1 Nd5=). Fahrudin87 (2020) – Maradona (1745), internet, 2006.

4.a3 Bg4

5.d4 Bf3 6.gf3 a5 7.ba5 Qa5 8.Qd2 Qc7 9.Bg2 Nbd7 10.Qg5 c5 11.c3 h6 12.Qd2 e6 13.h3 ½–½. Gall,Zdenek – Benassi,Aspasio, corr 3GMMsemi–10, 1997.

5.Ne5 Nbd7 6.Ng4+= Ng4 7.e4 Nh6 8.ed5 cd5 9.c4 dc4 10.Bc4 e6 11.Qh5 Qb6 12.0–0 Rc8 13.Bb5 Rg8 (13...a6 14.Bd7 Kd7 15.Nc3+=) 14.Nc3+/– g6 15.Qh3 Qd4 16.Rac1 Rd8 17.Qf3 a6 18.Ne4 Qb2 19.Bd7 Rd7 (19...Kd7 20.Nf6 Ke7 21.Rc7 Kd6 22.Qb7 Ke5 23.Ng8 Qd4 24.Re1 Kf5 25.Rf7 Kg5 26.h4 Kh4 27.Re4 Kg5 28.Rd4 Rd4 29.Nh6 Kh6+–) 20.Nf6 Ke7 21.Nd7 Kd7 (21...Rh8 22.Rc7 Nf5+–) 22.Qb7 Kd6 23.Rc5 (23.Rc5 e5 24.Qb6 Kd7 25.Rc7 Ke8 26.Qb8; 23.Qa6?! Ke7+/–) 1–0. Degterev,Pavel (1685) – Schalkwijk,Peter H, CFriend SL–2005–0–00033 email, 2005.

5.Ne5 Bf5 6.e3 =.

5.h3 Bf3 6.ef3 Nbd7 7.c4 g6 (7...e6 8.Nc3=+) 8.cd5= cd5 9.Nc3 e6 10.Qe2 (10.Rc1 Bg7=) 10...Bg7 (10...Be7 11.Rc1=) 11.Nd5+= 0–0 12.Ne3 a5 13.ba5 Qa5 (13...Ra5 14.Bc3 Ra4 15.Qb5+=) 14.Qb5+= Qa7 15.Rc1 Rfc8 16.Rc8 Rc8 17.Be2 Nc5 18.0–0 Na4 19.Ba1 Rd8 20.Qg5 (20.Rc1 Nb6+=) 20...h6 21.Qh4 (< 21.Bf6 hg5 22.Bd8 Nc5=+) 21...g5 22.Qb4 Nd5 23.Nd5 Rd5 24.Rc1 (24.Bg7 Kg7 25.Bb5 Rd4+/–) 24...Ba1+= 25.Rc8 Kh7 26.Qf8 (better is 26.Qb1 Kg7 27.Qa1 Qd4 28.Qd4 Rd4 29.Rc7+=) 26...Bg7+– 27.Qg8 (27.Qf7 Qd4 (27...Rd2?? 28.Qg8 Kg6 29.Qe6 Kh5 30.Qf7 Kh4 31.g3 Kh3 32.Qh5) 28.Qg8 Kg6 29.Qe6 Kh7 30.Qg8 Kg6+/–) 27...Kg6 28.Rc7 Qd4 29.Qf7 Kh7 30.Bd3!! (30...Rf5 31.Bf5 ef5 32.Qf5 Kh8 33.Rc8 Qd8 34.Rd8 Bf8 35.Qf8 Kh7 36.Qf7#) 1–0. Astatine – chilosca (2665), ICC, 2002.

4.a4 Bg4

5.e3 Nbd7 6.h3 Bh5 (6...Bf3 7.gf3 a5 8.ba5 Qa5 9.Bf6 ef6 10.Ra2–/+) 7.b5 White wins space (7.g4 Bg6+=) 7...Qc7 (7...Bf3 8.gf3 e6 9.h4=) 8.Be2 (8.g4 Bg6=) 8...e5 9.0–0 (9.g4 Bg6 10.g5 e4=) 9...Bd6 (9...a6 10.d4 Bf3 11.bc6 Qc6 12.Bf3+=) 10.d3 Rc8 (10...Bf3 11.Bf3 0–0 12.Kh1=) 11.c4 dc4 12.dc4 0–0 13.Nc3 (13.Qd2 Nc5 14.Rd1 Rcd8=) 13...Nc5 (13...Rfd8!?+=) 14.Nh4 Be2 15.Qe2 e4 (15...Rfd8 16.Rad1=) 16.Ba3 Rfd8 17.Nf5 Bf8 18.Ng3 (18.Nd4 Qe5=) 18...Qe5 19.Qc2 Re8 (19...Nd3 20.Bf8 Rf8 21.Rab1=) 20.Rad1 (20.Rfd1 h6+=) 20...Bd6 (20...cb5 21.ab5 Ncd7 22.Bf8 Nf8 23.Qb3=) 21.Rd4 cb5 22.ab5 Bb8 23.Bc5 Qc5 24.Nce4 Ne4 25.Ne4 Qb5 26.Qd3 Qc6 27.Ng5 g6 28.f4 h6 29.Ne4 Qe6 30.Rf3 a6 31.c5 Ba7 32.f5 gf5 33.Nd6 Bc5 34.Nf5 Bd4 35.Qd4 Qe5 36.Nh6 Kh7 37.Rf7 Kh8 38.Rf8 Kg7 39.Qe5+= Re5 40.Rc8 Kh6 41.Kf2 Kg5 42.g4 b5 43.Rg8 Kh6 44.Ra8 Re6 45.Rh8 Kg5 46.Kf3 Rh6 47.Rg8 Kh4 48.g5+/– Rh5? 49.Kf4+– b4 50.g6 b3 51.g7 b2 52.Rb8 Rb5 53.Rh8 Rh5 54.g8Q (54.g8Q b1Q 55.Qg4) 1–0. Jeric,Simon (2300) – Licina,Anita (2165), SLO–chT2 Slovenia, 2002.

5.e3 e6 6.b5 c5 7.c4 Be7 (7...Bd6 8.cd5 ed5 9.Be2=) 8.h3 Bh5 9.d4 (9.cd5 ed5 10.Be2 0–0=) 9...0–0 10.Be2 cd4 11.Qd4 dc4 12.0–0 Qd4 13.Bd4 Nbd7 14.g4 Bg6 15.Bc4 b6 (15...Rfd8 16.Rc1=) 16.Rd1 Bc5 (16...Rfd8 17.a5=) 17.a5 Be4 (17...Rfd8 18.Bc5 bc5 19.Nc3=) 18.Nbd2+– Bd4 (18...Bf3 19.Nf3 Rfd8 20.ab6 Bb6 21.Bb6 Nb6 22.Rd8 Rd8 23.Ne5+–) 19.Nd4 Bd5 20.Nc6 (20.g5 Bc4 21.Nc4 Nd5+–) 20...Nc5 21.g5 (21.Ne7 Kh8+–) 21...Bc4 22.Ne7 (worse 22.gf6 Bb5 23.Ne7 Kh8 24.ab6 ab6 25.Ra8 Ra8–/+) 22...Kh8 23.Nc4 (worse 23.gf6 Bb5 24.ab6 ab6 25.Ra8 Ra8–/+) 23...Nfe4 24.ab6 ab6 25.Ra8 (25.Nb6?! Rab8 26.Nd7 Nd7 27.Rd7 Rb5+=) 25...Ra8 26.Nb6 Rb8 (26...Re8 27.Kg2+–) 27.Nc6+– Re8 28.Nd7 g6 (28...Na4 29.b6 Nac5 30.Nc5 Nc5 31.Ra1+–) 29.b6 Rd8 (29...Kg7+–) 30.Nd8 1–0. DEFFM – GuestPGYW, freechess.org, 2018.

4.e3

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

4.e3 e6 5.a3 Bd6 6.c4 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd6 5.e3 0–0 6.c4 c6).

4.e3 Bg4 5.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 c6).

4.e3 g6 5.c4 Bg7 6.d4 Nbd7 7.Nc3 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 c6 6.d4 d5 7.Nc3 Nbd7).

4.e3 g6 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).

4.e3 g6 5.Be2 Bg7 6.d3 0–0 7.0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.Be2 0–0 6.0–0 c6 7.d3).

4.Bf6 ef6

5.c3 Bd6 6.h3 0–0 7.d4 (7.e3 Re8=+) 7...a5–/+ 8.Qa4 (8.b5!?–/+) 8...b5 9.Qb3 ab4 10.cb4 Ra4 (10...Na6 11.e3–+) 11.Nfd2 (11.e3 Na6–/+) 11...Bb4 12.Nc3? (12.e3 f5 13.g3 Re8–+) 12...Bc3 (better 12...Qa5 13.Na4 Bd2 (13...ba4?! 14.Qc2=) 14.Kd1 Be1–+) 13.Qc3–/+ Qb6 14.e3 Re8 15.Be2 Qa7 16.Qb2 (16.0–0 Bf5–/+ (16...Ra2? 17.Ra2 Qa2 18.Ra1 Qa1 19.Qa1+–)) 16...Nd7 (16...f5 17.g3–/+) 17.Nb3 (17.0–0 Nb6=+) 17...Nb6 (17...b4 18.Bg4–/+) 18.Nc5 (18.Qc2 Nc4=+) 18...Qa5 (18...Ra3 19.0–0–/+) 19.Qd2=+ Qd2 20.Kd2 Ra7 21.Rhc1 Bf5 22.g4 Bg6 23.Rc3 Rea8 24.a3 b4 (24...Nc8!?=+) 25.Rb3= Ra3 26.Raa3 Ra3 27.Rb4 Ra2 28.Ke1 Ra1 29.Kd2 Ra2 30.Ke1 Ra1 31.Kd2 ½–½. petrobbo (2035) – JonnyBeanBag (2200), ChessWorld.net, 2010.

5.d4 Bb4 6.c3 Bd6 7.Qb3 Be6 (7...0–0 8.Nbd2–/+) 8.e3 (8.Qb7 Qb6 9.Qb6 ab6=+) 8...Nd7 (8...b6!?–/+) 9.Qb7= 0–0 10.Qc6 Qc7 (better 10...Nb6!?=) 11.Qc7+– Bc7 12.Bd3 Rac8 13.0–0 Ba5 14.Rc1 f5 15.Ne5 (15.Nfd2 Rfe8+–) 15...Nf6 (15...Ne5 16.de5 g5 17.Rd1+=) 16.a4 Bc7 17.f4 h6 (17...Be5 18.fe5 Ng4 19.Na3+–) 18.Nd2 (18.Nc6 Rce8+–) 18...g5 (18...Ba5!? 19.Nb3 Bc3+–) 19.Nc6+– Rce8 (19...gf4 20.Ne7 Kh8 21.Nc8 Rc8 22.ef4 Bf4 23.Rc2+–) 20.Na7 gf4 21.ef4 Bf4 22.Rd1 Ng4 (22...Ne4 23.Nb1+–) 23.Nf3 Bd7 24.a5 (better 24.Rdb1+–) 24...Ne3? (better 24...Ra8 25.Nb5 Be3 26.Kf1 Nf2+–) 25.Re1 (25.Rdb1 Re7+–) 25...Kh7 (25...Nc4 26.g3 Re1 27.Re1+– (worse 27.Ne1 Be3 28.Kf1 Ra8=+)) 26.a6 Rg8 27.g3?? (better 27.Re2+–) 27...Bg3= 28.hg3 (28.Ng5 Rg5 29.hg3 Kg7=) 28...Rg3=+ 29.Kh2 Rf3 30.Bb1?? (better 30.Bb5 Ra8 31.Bd7 Ra7 32.Rec1=+) 30...Rg8 (30...Ng4!? 31.Kg2 Rf2 32.Kg3 Re1 33.Bf5 Rf5 34.Re1–+) 31.Ra2 Kh8 32.Rae2 (32.Kh1–+) 32...f4 33.Ba2 (33.Kh1 Ng4 34.Rg2 Rh3 35.Kg1–+) 33…Rh3 0–1. alessandrocarvalhaes (1785) – roastr (1665), lichess.org, 2017.

5.e3 Bb4 6.c4 –/+.

5.e3 Bb4!? 6.Bd3 Bd6 –/+.

5.e3 Nd7 6.a3 Be7 7.Nc3 0–0 8.Bd3 Ne5 9.0–0 Nd3 10.cd3 Bg4 11.h3 Bh5 12.e4 a5 13.b5 d4 14.Ne2 Bf3 15.gf3 cb5 16.Qb3 b4 17.Nf4 Bd6 18.Nd5 a4 19.Qc4 Qd7 20.Kg2 b5 21.Qc1 ba3 22.Rg1? (better is 22.Nb6 Qe6 23.Na8 Ra8 24.Qc6–+) 22...Rfc8 23.Qf1 Rab8 24.Kh1 Kh8 25.Qg2 Rg8 26.f4 b4 27.h4 b3 28.h5 b2 29.Rab1 Qb7 30.f5 (30.e5 fe5 31.fe5 Bf8–+) 30...a2 31.Rbf1 (31.h6 gh6 32.Qf1–+) 31...b1Q (32.f4 Qd3–+) 0–1. gordon gecko (1795) – Klaus Behrmann (2380), ChessWorld.net, 2003.

5.e3 Bg4 6.h3 Bf3 7.Qf3 Bd6 (7...Bb4 8.Qg4 Bf8 9.d4+=) 8.Bd3 (8.a3 Nd7=) 8...0–0 9.0–0 Qe7 10.Nc3 Qe5 11.e4?? (better is 11.Rfb1=) 11…Qh2 0–1. jmcauley (1800) – dsteel (2130), net–chess.com, 2013.

4.g3 Bf5

5.Bg2 Nbd7 6.0–0 e6 7.a3 Be7 8.d3 Qc7 9.c4 0–0 (9...dc4 10.dc4 0–0 11.Nbd2=) 10.Nbd2 (10.Nh4 Bg4=) 10...Rac8 (10...a5 11.cd5 ab4 12.dc6 ba3 13.Bf6 (worse is 13.cd7 ab2 14.Rb1 Qd7+=) 13...Bf6 14.cd7 Ba1 15.Qa1 Qd7 16.Qa2+=) 11.Qb3 (11.Qc2 c5=) 11...h6 (11...e5 12.Rac1 d4 13.e3=) 12.Rfe1 Rfe8 (12...e5 13.Qc2=) 13.e4+= de4 14.de4 Bg4 15.e5 Bf3 (15...Nh7 16.h3 Bh5 17.Qe3+=) 16.Nf3 (16.ef6?! Bg2 17.fe7 Bh3=) 16...Nh7 17.Rad1 Red8 18.Qe3 Nb6 19.Bf1 Nf8 20.Nd2 (20.Bd3 Rd7+=) 20...Na4 21.Ba1 a5 (21...c5 22.b5+=) 22.c5 ab4 23.ab4 b5 (23...b6 24.Ne4+=) 24.Ne4+/– Rd5 (24...Rd1 25.Rd1 Ra8 26.Nd6+/–) 25.Nd6 (25.Nf6 Bf6 26.ef6 Rd1 27.Rd1 g5+–) 25...Ra8 (25...Rd1 26.Rd1 Bd6 27.cd6+/–) 26.Rb1 (26.Bd4!? Bd6 27.cd6 Qd7+–) 26...Nd7 (26...Bd6 27.cd6 Qd8 28.Rec1+–) 27.Bg2 1–0. Livelo – St_Jean, email 4AMM–06, 1997.

5.Bg2 e6 6.a3 c5 7.bc5 Bc5 8.Bd4=+.

5.Bg2 e6 6.a3 Nbd7 7.0–0= Bd6 8.d3 (8.Nh4 Be4=+) 8...0–0 (8...a5 9.e4 de4 10.de4 Ne4 11.Bg7–/+) 9.Nbd2 (9.Nh4 Bg4=+) 9...a5=+ 10.Rb1 (10.ba5 Qa5 11.Nb3 Qa4=+) 10...ab4 11.ab4 Qe7 (11...Qc7 12.Nd4=+) 12.c3 (12.b5 e5=+) 12...h6 (12...e5 13.c4–/+) 13.Qb3 (13.Nd4 Bg4=+) 13...e5 14.Nh4 (14.Ra1 b6=+) 14...Bh7 (14...Be6 15.Nhf3–/+) 15.Rfe1 (15.Ra1 e4 16.de4 Ne4 17.Ne4 Be4 18.Ra8 Ra8–/+) 15...e4–/+ Black gets the initiative 16.de4 de4 17.Rbd1 (17.Nc4 g5 18.Nd6 Qd6–+) 17...g5–+ 18.Nc4 (18.Nhf3 ef3 19.ef3 Qd8–+) 18...Bc7 19.Bc1 (19.Nf3 ef3 20.ef3 Qd8–+) 19...b5 20.Ne3 (20.Na5 Ba5 (20...gh4?! 21.Nc6 Qe8 22.Bh6=+) 21.ba5 Ra5–+) 20...gh4 21.Bh3 (21.Nc2 hg3 22.hg3 Kg7–+) 21...hg3 22.hg3 Bb6 (22...Rfd8 23.Nf5 Bf5 24.Bf5–+) 23.Kg2 (23.c4 Rfd8–+) 23...Ne5 24.Nf5 (24.Rh1 Rfd8–+) 24...Bf5 25.Bf5 Kg7 (25...Neg4 26.Bg4 Ng4 27.Bf4 Bf2 28.Bh6–+) 26.Rh1 Rh8 27.Rh4 e3 28.fe3 (28.f3 Ra1–+) 28...Nc4 (28...Ng6 29.Rh3–+) 29.Bd3 (29.e4 Be3 30.Qb1 Qe5–+) 29...Ne3 30.Be3 Qe3 31.Rf1 Qe6 (31...Rhf8 32.Rhf4 Nd5 33.Rg4 Kh8 34.Re4–+) 32.c4 (32.Qe6 fe6 33.c4 bc4 34.Rc4 Rhc8–+) 32...Be3 (32...Bc7 33.Rf3–+) 33.Qc3 Bg5 (33...Rhd8 34.cb5 cb5 35.Bb5–+) 34.Rh5 (34.Re4 Qd7–+) 34...bc4 35.Bc4 Qe3 (better 35...Qe7–+) 36.Qb2 (36.Qe3 Be3 37.Rhf5 Bd4–+) 36...Qd2 (36...Qe4!? 37.Rf3 Qg4 38.Qe5–+) 37.Qe5 (37.Qd2 Bd2 38.Rhf5 Bc3–+) 37...Rae8 38.Qf5 (38.Qc5 Re2! (38...Nh5 39.Rf7 Kg8 40.Rd7 Qd5 41.Bd5 cd5 42.Qd5 Re6 43.Qe6 Kf8 44.Qf7) 39.Kh1 Re4–+) 38...Re2! (38...Qb4 39.Rg5! Kf8 40.Qf6 Qc4 41.Qh8 Ke7 42.Re5 Kd6 43.Qe8 Qe4 44.Re4 Kc7 45.Rf7 Kb6 46.Qb8 Kc5 47.Rf5) 39.Kh1 (39.Be2 Qe2 Decoy theme: e2) 39...Re7 40.Rh2 Qd7 (40...Qb4 41.Rc2–+) 41.Qf3 Rhe8 (41...Re4 42.Rd1 Qb7 43.Rc2 Qb4 44.Bd3–+) 42.Qc3 (42.Rc2 Re3 43.Qg2 Qg4–+) 42...Re3 43.Qb2 (43.Qc2 Qg4–+) 43...Re1 (43...Qg4 44.Ba6–+) 44.Qf2 (44.Qg2 Qg4 45.Bd3 Rd1–+) 44...Rf1 (44...Ng4 45.Qb2 Bf6 46.Qd2 Rf1 47.Bf1–+) 45.Qf1 (45.Bf1 Qd1 46.Qf5 Ng4–+) 45…Qd6 (45...Qd6 46.Kg2 Qd2 47.Kg1 Qb4–+) 0–1. Cingari,Julio – Jarrouj,Jackson, Feria del Orinoco op, 2001.

5.Bg2 e6 6.a3 Nbd7 7.d3 Be7 8.Nbd2 0–0 9.0–0 a5 10.b5 cb5 11.Nd4 Qb6 (11...Rc8 12.Nf5 ef5 13.e3=+) 12.Nf5 ef5 13.Nb3 (13.Bh3 Ng4=+) 13...a4 (13...b4 14.a4=+) 14.Nd4= g6 (14...f4 15.Nf5 Bc5 16.d4=+) 15.Qd2 (15.Rb1 Rfc8 16.Nb5 Ra5+=) 15...Rfe8 (15...b4 16.e3=) 16.Rfb1 (16.c3 Bc5=) 16...Bc5 (16...b4 17.c3 b3 18.Rc1=+) 17.e3 Bd4 (17...b4!?=) 18.Bd4+– (18.ed4?! Re6=) 18...Qc6 19.Ra2 Rec8 (19...b6 20.Qc3 Qe6 21.Rb5+–) 20.Qb4 Ne8 (20...Rc7 21.Qb5 h6 22.h3+–) 21.Qb5+– Nc7 (21...Nef6 A) 22.Qb7? Rab8 23.Qb8 Rb8 (23...Nb8?! 24.Rb6 Qc7 25.Rf6–+) 24.Rb8 Nb8–+; B) 22.c3+–) 22.Qb7 Qe6 23.Qb2 (23.Ba7 Ne5+–) 23...Rab8 24.Qc1 (24.Qa1 Nb5 25.Rb4 Nd4 26.Qd4 Rb4 27.ab4 Nb6+–) 24...Nb5+– 25.Rb4 Nd4 (25...f4 26.gf4 Nd4 27.Rd4+–) 26.Rd4 Nb6 27.Rb2 Qc6 (27...Qd6 28.Qb1+–) 28.c4! Qc5 (28...dc4 29.Bc6 Pinning (29.Bc6 Deflection)) 29.Bd5 (29.Qc3 dc4 30.dc4 Qe7+–) 29...Qa3 30.Qb1 Qc5 31.Bf3 Qc7 32.Qa1 (32.Rb5 a3 33.Qa1 Nd7 34.Qa3 Ne5+–) 32...Rd8 (32...h6 33.Ra2+–) 33.Ra2 (33.Rd8 Rd8 34.d4 f4+–) 33...Rd4 (33...Qe7 34.Bc6+–) 34.Qd4 (34.ed4 Qd8+–) 34...Rd8 35.Qc3 Qc5 36.Rc2 Rc8 37.Qb2 (37.Rb2 Nd7+–) 37...a3 (37...Qa5 38.Qc1+–) 38.Qb3 Nd7 (38...Rc7 39.d4 Qa5 40.c5+–) 39.Ra2 Rb8 (39...Qc7 40.Ra3 Ne5 41.Bd5+–) 40.Qa3 Rb1 (40...Rb4 41.Qa5 Rb1 42.Kg2+–) 41.Kg2 Qb6 (41...Qe5+–) 42.Qe7 Qe6 43.Ra8 Kg7 44.Qe6 fe6 45.Ra7 1–0. Guerrini,Donato – Rossi,Giampiero (2020), Bernate op, 1999. (=1.Nf3 d5 2.g3 c6 3.b4 Bf5 4.Bb2 e6 5.Bg2 Nf6)

4.g3 Bg4

5.Bg2 Nbd7 6.0–0 Qb6 7.a3 a5 8.Bd4 Qc7 9.ba5 Ra5 10.d3 e5 11.Bb2 Bd6 12.Nbd2 0–0 13.Nb3 Ra7 14.Nfd2 Rfa8 15.h3 Be6 16.Qc1 b5 17.c4 bc4 18.dc4 Rb8 19.cd5 cd5 20.Qc7 Bc7 21.Bc3 Bd6 22.Na5 Rc8 (22...Rc7!? 23.Rfc1 d4–/+) 23.Bb4+= Bf8 24.Rfc1 Rac7 25.Rc7 Rc7 26.e3 Rc8 27.Ndb3 Bb4 28.ab4 Kf8 29.Rc1 Rc1 30.Nc1 Ne8 31.Nc6 f6 32.Ne2 Nb6 33.f4 Bd7 34.Nb8 Ke7 35.Nc3 Be6 36.Nb5 Nc4 37.Kf2 Kd8 ½–½. Lorenc,Tomas (2090) – Natsidis,Christoph (2305), Karlovy Vary op, 2009.

5.Bg2 e6 6.a3 a5 7.ba5 (7.Nc3 Bd6=) 7...Ra5+= 8.d3 Bc5 (8...Nbd7 9.Nbd2+=) 9.0–0 Nbd7 10.Nbd2 Ra4 (10...Bd6 11.h3 Bh5 12.Bc3=) 11.c4 Qa8 12.Qb3 (12.d4 Bb6= (12...Ba3?? 13.Qb3+–)) 12...0–0= 13.Qc3 (13.h3 Bh5=) 13...Bf3 (13...Qa6 14.h3 Bf3 15.Bf3+=) 14.Bf3= Qa7 15.d4 Be7 16.e4 (16.e3 h6=) 16...Ra8 (16...Ne4!? 17.Ne4 Rc4=) 17.e5+= Ne8 18.c5 (18.cd5 cd5 19.Be2 Qb6+=) 18...b6= 19.Bd1 (19.cb6 Qb6 20.Bd1 R4a6=) 19...Ra6 (19...bc5 20.Ba4 Qa4 21.dc5 Ne5 22.Rab1+=) 20.Be2 Ra4 (20...bc5 21.Ba6 Qa6 22.dc5 Nc5 23.a4=) 21.Bd1 (21.cb6 Qb6 22.Bd1 R4a6=) 21...Ra6 22.Be2 Ra4 ½–½. Safanowski,Tomasz (1930) – Pettersson,Alexander (1945), 102nd YMCA Winter B, 2012. (=1.Nf3 Nf6 2.g3 d5 3.Bg2 c6 4.b4 Bg4 5.Bb2)

5.Bg2 Bf3 6.Bf3 e6 7.c3 Bd6 8.0–0 0–0 9.Qb3 b5 (9...Nbd7 10.d3=+) 10.a4= Qb6 11.ab5 Qb5 12.d3 c5 13.Ra5 (better is 13.Ra4 Nbd7 14.c4=) 13...c4?? (better is 13...Qb6=) 14.dc4+– (14.Rb5?! cb3 15.Nd2 Nc6+/–) 14...Qc4?? (better is 14...Qd7 15.cd5 ed5 16.Bd5 Nc6+–) 15.Qc4 dc4 16.Ba8 (16...Bc7 17.Ra7+–) 1–0. vallabhan – LuckyMiki, internet, 2007.

4.g3 g6

5.Bg2 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 d5 5.Bg2 c6).

5.Bg2 Bg7 6.d3 0–0 7.Nbd2 Bg4 8.0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 0–0 5.Bg2 d5 6.0–0 c6 7.d3 Bg4 8.Nbd2).

3.Nf3 Bg4

4.a3 Nd7=.

4.a3 Bf3 5.ef3 e6 6.Be2 Nf6 7.0–0 Nbd7 8.c4 e5 (8...dc4!? 9.Bc4 Bd6=+) 9.d4 Bd6 10.cd5 (10.c5 Bc7=) 10...cd5 (10...Nd5!? 11.Nc3 Nc3 12.Bc3 0–0=) 11.de5+= Be5 12.Be5 Ne5 13.Bb5 Nc6 14.Re1 Kf8 15.Nc3 Rc8 (15...a5 16.Bc6 bc6 17.Na4+=) 16.Qd3+/– a6 17.Bc6 Rc6 18.Ne4 g6 19.Rad1 (19.Nf6 Qf6 20.Qd5 Kg7+/–) 19...Kg7 20.Nf6 Rf6 (20...Qf6 21.Qd5 b5 22.a4 ba4 23.Qa2+/–) 21.Qd5 (21.Qc3 Qd7+/–) 21...Qd5 22.Rd5 Rc8 23.h3 b5 24.Rc5 ½–½. Woschkat,Karl_Heinz – Dufour Jr,Roger (1625), IECG, 1996.

4.Nc3 Nd7 5.e3 e5 6.Be2 (6.a3 Bd6+=) 6...Bb4 (6...Bf3 7.Bf3 Bb4 8.a3 Bc3 9.Bc3–/+) 7.Rb1 (better is 7.Ne5!? Ne5 8.Bg4+=) 7...Ngf6–/+ 8.Ba1 a5 9.Na4 b5 10.Nb2 a4 11.Nd3 Bd6 (better is 11...Bf3!? 12.Nb4 Be2 (12...Bg2?! 13.Rg1 Be4 14.Nc6=) 13.Qe2 Rc8–/+) 12.Nfe5+= Be2 13.Qe2 Ne5 14.Ne5 Qc7 15.f4 Rb8 16.0–0 0–0 17.Rf3 Be7 18.g4 Bd6 19.g5 Nd7 20.Ng4 Rfe8 21.Rh3 Bf4 (better is 21...Qc8–/+) 22.Qd3+/– Ne5? (better is 22...Re4!? 23.ef4 Rbe8+/–) 23.Qh7 Kf8 24.ef4 Ng4 25.Bg7?? (25.Qg7 Ke7 26.Re1 Kd6 27.Rh6 Nh6 28.Re8 Kd7 29.Rb8 Qb8 30.gh6 Qf4+–) 25...Ke7 26.Re1 Kd8?? 27.Re8+– Ke8 28.Qg8 Ke7= 29.Bf6 Ke6 30.Qg7?? Qf4–/+ 31.Bd4 Re8 32.Be3 Qf5 33.Qd4 Ne5 34.Rh6 Ng6 35.Qf4 Qf4+= 36.Bf4 Kf5 37.Be3 Re4 38.Kf2?? d4–+ 39.Bd4 Rd4 40.d3 Rh4 41.Rh4 Nh4 0–1. Sim1 – normn, ChessWorld.net, 2012.

4.d3 e6 5.Nbd2 (better is 5.a3=) 5...Bb4?? (better is 5...Nf6 6.Ne5 Bf5=+) 6.Bg7+– Bf3 7.gf3 (7.Bh8?! Bh5+–) 7...Qg5 (7...Bc3 8.Bc3 d4+–) 8.Bh8 f6 (8...Nf6 9.Rb1 Na6 10.a3+–) 9.e3 (9.Rb1 Na6+–) 9...Qh6 (9...h5 10.c3 Bc3 11.Qb3 Bd2 12.Kd2+–) 10.Qb1 (10.Rb1 c5+–) 10...Qf8 11.Qb3 b6 12.Rg1 h6 13.e4 Bd2 14.Kd2 Ne7 15.Bg7 Qf7 16.Bh6 Qh5 17.Be3 Nd7 18.Be2 Qh2 19.Rh1 Qc7 20.Rh7 Nf8 21.Rh8 0–0–0 22.Rg1 Re8 23.Bh6 Neg6 24.Rg6! Qf7 25.Rgg8 Kd8 26.f4 f5 27.Bf8 Kd7 28.Rg7 Qg7 29.Bg7 Re7 30.Bf6 Rf7 31.Rd8 Kc7+– 32.Qc3 fe4 33.Qe5 Kb7 1–0. Klawonn,Markus – Wenke,Petra, JBLN West, 1993.

4.Bd4 Nd7 5.a3 Ngf6 6.Nc3 (6.Bb2 e6=+) 6...e6 (6...Bf3 7.Bf6 Be2 8.Ne2 Nf6 9.d4–/+) 7.Ra2 (7.Ne5 Ne5 8.Be5 Bd6=+) 7...Be7 8.Ne5 Ne5 9.Be5 Bd6 (9...d4 10.Bf6 Bf6 11.Ne4–/+) 10.Bd6 Qd6 11.h3 Bh5 12.d4 0–0 13.Qd2 Bg6 14.e3 Ne4 15.Ne4 Be4 16.f3 Bg6 17.c4 dc4 18.Bc4 Rad8 19.Qf2 (19.0–0 e5=+) 19...h6 (better is 19...e5!?–/+) 20.0–0= a6 21.Rd2 Qc7 (21...Ra8 22.Rb2=) 22.e4 Qe7 23.Qg3 Qf6 (23...b5 24.Bb3=) 24.Rfd1+= Rfe8 25.Qc7 Qe7 26.Qe7 Re7 27.g3 Red7 28.Kf2 Kf8 29.Ke3 Ke7 30.Kf4 (30.g4 b5 31.Bb3 a5+=) 30...Bh5 31.g4 Bg6 32.h4 f6 33.h5 Bf7 34.Ke3 Rd6 (34...e5 35.Bf7 Kf7 36.d5+=) 35.e5+/– fe5 36.de5 Rd2 37.Rd2 Rd2 38.Kd2 g6 39.g5 (39.hg6 Bg6 40.Bd3 Bf7+/–) 39...gh5+= 40.gh6 Bg6 41.Ke3 h4 (41...Bf5 42.Kf4 h4 43.h7 Bh7 44.Kg4=) 42.Kf4 (42.Bf1 Kf7 43.Bh3 b6+=) 42...h3 43.Kg3 Bf5 44.Bf1 Kf8? (better is 44...Kf7+=) 45.Bh3+– Bh3 46.Kh3 Kf7 47.Kg4 Kg6 48.f4 Kh6 49.f5 ef5?? (49...Kg7 50.f6 Kf7+–) 50.Kf5 Kg7 51.Ke6 Kf8 52.Kd7 Kf7 53.e6 Kf8 54.e7 (54…Kf7 55.e8Q Kf6 56.Kc8 a5 57.Qd8 Ke6 58.Qa5 b5 59.Qa7 Kf6 60.Qc5 Kf7 61.Qc6 Kg7 62.Qb5 Kf6 63.Qc6 Ke5 64.b5 Kf4 65.b6 Kg3 66.b7 Kg4 67.Qg2 Kf4 68.b8Q Kf5 69.Qb5 Kf6 70.Qg8 Ke7 71.Qe5) 1–0. Paz01 – Balagan, 2002.

4.Bd4 e6 5.Nc3 Nd7 (5...Bb4?? 6.Bg7 Nd7 7.Bh8+–) 6.h3 (6.Rb1 Bf3 7.ef3 a5+=) 6...Bh5 (6...Bf3 7.ef3 A) 7...Bb4?? 8.Bg7 Bc3 9.dc3+– (9.Bc3?! Ngf6=); B) 7...a5–/+) 7.g4+= Bg6 8.e3 Bb4?? (8...Qc7 9.Ne2 A) 9...Bb4?? 10.Bg7 Be4 11.Neg1+– (11.Bh8?! Bf3 12.Rg1 Ngf6+/–); B) 9...Ngf6–/+) 9.Bg7+– Bc3 10.dc3 (10.Bc3?! f6+=) 10...f6 11.Bh8 Qa5 12.Qd2 Nh6? (12...Be4 13.Bg2 Bf3 14.Bf3 Ne5+–) 13.Bg7 (13.Bd3 Be4 14.Be4 de4+–) 13...Nf7 14.Bd3 0–0–0 15.0–0 (better is 15.Nd4 Rg8 16.Ne6+–) 15...Rg8 16.Nd4 Rg7 17.Ne6 Rg8 18.Kh1 Nde5 (18...Nd6 19.Rab1+/–) 19.Rfb1 (19.f4!? Nc4 20.Bc4 Be4 21.Kg1 dc4+–) 19...Nf3 20.Qe2 Be4 21.Be4 de4 22.Qc4 Qe5 23.Nf4 Rg7? (23...Qe7 24.Qa4 a6 25.Qb4+–) 24.Qe6 (better is 24.Rb7 Kb7 25.Rb1 Kc7 26.Qa6 Qc3 27.Qa7 Kd6 28.Qb8 Kc5 29.Qf8 Kc4 30.a3+–) 24...Kc7?? (24...Qe6 25.Ne6 Rg6+–) 25.Qe5 N7e5 26.Ne6 Kd6 27.Ng7 Nd2 28.Rb7 a5 29.Rd1 Nef3 30.Nf5 Ke5 31.Rh7 Nc4 32.Re7 1–0. Yannick – Saemi, playchess.de, 2005.

4.Bd4 Bf3 5.ef3 Nd7 6.Qe2 (6.f4 e6=+) 6...Ngf6 (6...e6 7.a3=+) 7.f4 Ne4 (7...e6 8.f5 e5 9.Be5 Ne5 10.Qe5 Kd7 11.a3=+) 8.Nc3 Ndf6 (8...Nd6 9.Qh5=) 9.Ne4 Ne4 10.Qe3 (10.Rb1 Qd7=) 10...e6 11.Rb1 b6 (11...a5 12.Bb6 Qf6 13.ba5=) 12.Bd3+= f5 (12...Qd7 13.Be4 de4 14.Qe4+=) 13.f3+/– Nf6? (better is 13...Nd6!?+/–) 14.Bf5+– Nd7 (14...Bd6 15.Qe6 Qe7+–) 15.0–0 g6 (15...Qe7 16.Rfe1 Kd8 17.Be6 Qd6+–) 16.Qe6 Qe7 17.Qc6 Rg8 1–0. lucya (2105) – Gnatman (1710), GameColony.com, 2002.

4.Bd4 f6 5.Bc3=+.

4.e3 Nf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4).

4.h3 Bh5 5.e3 f6 6.Be2 e5 7.g4 Bf7 8.a3 Bd6 9.c4 dc4 10.Qc2 b5 11.d3 Ne7 (11...a5 12.dc4 ab4 13.0–0=) 12.dc4+= bc4 (12...a5 13.ba5 Qa5 14.Nc3+=) 13.0–0 0–0 (13...a5 14.ba5 Nd5 15.Rd1+=) 14.Nbd2+– Nd7 (14...a5 15.ba5 (15.Bc4?! ab4 16.ab4 Ra1 17.Ra1 Nd5+=) 15...Nd7 16.Nc4+–) 15.Nc4 Bc4 (15...Nb6!?+–) 16.Bc4+– Kh8 17.Rfd1 Qc7 18.Rac1 Nb6 19.Be6 Rad8 20.g5 Ng6 (20...Qb8 21.h4+–) 21.gf6 (21.Qc6?! Qe7 22.Bf5 fg5+–) 21...Rf6 22.Bg4 Rdf8 (22...Qe7 23.Qe4+–) 23.Qc6 Qe7 (23...Qc6 24.Rc6 Be7 25.Rf6 gf6 26.Be6+–) 24.Qe4 Na8 (24...Bb8 25.Rc2+–) 25.h4 (better 25.Rc2+–) 25...Nh4 (25...Nb6 26.Rc2 Na4+–) 26.Nh4 Rf2 (26...Nb6 27.Rc2 Qf7 28.f4+–) 27.Nf5 R2f5 28.Bf5 Qg5 (28...Nb6 A) 29.Bh7 Qg5 30.Qg2 Qe3 31.Kh2 Rf2 32.Rd6 Rg2 33.Kg2 Qe2 34.Kg3 Kh7 (34...Qb2?? 35.Bg6 Qa3 36.Rd3 Qd3 37.Bd3+–) 35.Rh1 Kg8–+; B) 29.Rc2 h6 30.Rf2+–) 29.Bg4 Qh4 (29...Bc7 30.Rf1 Re8+–) 30.Rc2 (30.Rd6?! Qf2 31.Kh1 Qh4 32.Kg1 Qf2 33.Kh1 Qh4 34.Kg1=) 30...Qf6 31.Rd6! Qd6 32.Be5 Qh6 (32...Qe7 33.Rh2 Rf1 34.Kf1 Qf7 35.Kg2 Qa2 36.Kg1 Qg8 37.Qf5 Nb6 38.Rh7 Qh7 39.Qf8 Qg8 40.Bg7 Kh7 41.Bf5) 33.Rh2 (33.Rh2 Qh2 34.Kh2 Rf2 35.Kg3 Rf8 36.Qb7 Rg8 37.Kh2 Nc7 38.Qc7 h6 39.Bf5 a6 40.Qc6 Rf8 41.Qh6 Kg8 42.Qg7) 1–0. Pierre – Arit, internet, 2019.

4.e3 Nd7

5.c4 e5 6.cd5 cd5 7.Qa4 Bf3 8.gf3 Ngf6 (8...a6 9.d4=) 9.Nc3 (9.Be5!? Bb4 10.Bh3=) 9...a6+= 10.Rg1 b5 (10...Rg8 11.f4 ef4 12.Bg2 fe3 13.de3+=) 11.Qb3= Nb6 12.a4 ba4 13.Na4 Nc4 (better is 13...Nbd7!?=) 14.Bc4+/– dc4 15.Qc4 g6? (better is 15...Qd5 16.Nb6 Qc4 17.Nc4 Nd5+–) 16.Qc6 Nd7 17.Be5 Rg8 (17...Rc8 18.Qe4 Rg8 19.Bc7 Qe7+–) 18.Nb6! Bb4 (18...Qb6 19.Qa8 Double attack (19.Qa8 Deflection)) 19.Nd7 Qd7 20.Qa8 Qd8 (20...Ke7 21.Qg8 Bd2 22.Ke2 Qb5 23.Kd2 Qe5 24.Rgc1 Qb2 25.Ke1 Qb4 26.Kf1+–) 21.Ra6 Bd2 22.Ke2 f6 23.Qc6 Kf8 1–0. usingprogram (2060) – danchob74, internet, 2013.

5.c4 e5 6.h3 Bf3 7.Qf3 Ngf6 8.cd5 cd5 9.Bb5 Bd6 10.Nc3 e4 11.Qf5 a6 12.Bd7 Qd7 13.Qd7 Kd7 14.Na4 Ke6 (14...Ke7 15.a3 Nd7 16.Nc3 Ke6 17.Ne2 Be5 18.Nd4 Bd4 19.Bd4 Rac8+=) 15.Bf6 (15.Nc5 Bc5 (15...Ke7 16.a3 Bc5 17.bc5 Rhc8 18.Bd4 Nd7 19.Rb1 Nc5+=1) 16.bc5 Rac8 17.Bd4 Nd7 18.Rb1 Rc7 19.Ke2 Rhc8+=) 15...gf6 (15...Kf6 16.Rb1 (16.Nb6 Rad8 17.a3 Be5 18.Rc1 Bb2 19.Rc5 Ba3+=; 16.a3+= a5 17.b5 Rad8 18.Ke2 d4 19.ed4 Bf4+=) 16...Ra7 17.d3 Re8 18.de4 de4 19.Ke2 b5=) 16.Ke2 (16.Nc5 Ke7+= (16...Bc5) 17.Nb7 Bb4 18.Rb1 a5 19.a3 Ba3–+) 16...Rac8 17.a3 Rhg8 18.g3 (18.g4 b5 19.Nc3 Be5+=) 18...b5 19.Nc3 Be5 20.Rhc1 Rc4 21.a4 (21.Ra2 d4 22.ed4 Bd4+=) 21...Rgc8 (21...Rb4!? 22.ab5 ab5–/+) 22.ab5= ab5 23.Ra6 White gets the initiative 23...Kf5 24.Rb6 Rb4 25.Nd5+= Rc1 26.Nb4 Rh1 27.h4 Rh2 28.Rb5 Kg4 29.Nd5+/– Kh3 30.Nc3+– Bg3 31.Ne4 Bh4 32.Rh5 Kg2 33.Rh7 f5 34.Rg7 Kh1 35.Ng3 Bg3 36.Rg3 Rh6 37.Kf3 Rf6 38.Kf4 Kh2 39.Rg5 Rb6 40.d4 Rb5 41.Rf5 (41.Rf5 Rb7 42.Ke5+–) 1–0. Schulz,Karsten – Boenisch,Manfred, Ch Germany, XI, Binz (Germany), 1995. (=1.Nf3 d5 2.b4 c6 3.Bb2 Bg4)

4.e3 e5

5.Be5 Qe7? 6.Bb8 (better 6.Bd4!?+–) 6...Rb8+= 7.Be2 g6 (7...Bf3 8.Bf3 Qb4 9.Nc3=) 8.a3+= Bg7 9.d4 Nf6 10.0–0 0–0 11.c4 b6 (11...Ne4 12.h3 Bf5 13.Nfd2+=) 12.Ra2 Ne4 13.Nfd2 Be2 14.Qe2 Rfe8 15.Re1 (15.cd5 Nd2 16.Nd2 cd5+–) 15...Nd6 16.a4 (16.cd5!? cd5 17.Nc3+=) 16...dc4 (16...Bd4 17.Rc2=+) 17.Nc4= Ne4 (better 17...Rbd8=) 18.Nbd2?? (better 18.f3 Nd6 19.Nc3+=) 18...Nc3–+ 19.Qf3 (19.Qg4 Na2 20.b5 cb5 21.ab5 Nc3–+) 19...Na2 20.Qc6 Nb4 (better 20...Bd4 21.Rd1 Nb4–+) 21.Qb5 (21.Qd6 Bd4! 22.Qd4 Nc2–+) 21...Nd3 (better 21...a6 22.Qe8 Qe8–+) 22.Rf1 Qb4 23.Qb4 Nb4 24.Nd6 (24.g4 Re6–+) 24...Re6 25.N2c4 (25.N6c4 Rc8–+) 25...Nd5 (25...a6 26.Rb1 Nd5 27.Kf1–+) 26.Rb1 (26.g4 Rd8 27.Nb5 a6–+) 26...Rd8 27.Nb5 Rd7 (27...a6 28.Nba3 Rc8 29.Nd2–+) 28.Nba3 Rc7 29.Rb5 (29.g3 Bf8 30.Kg2 Rec6–+) 29...Nc3 30.Nc2 (30.Rb3 Bd4 31.g3–+) 30…Nb5 (30...Nb5 31.ab5 Rc4–+) 0–1. Darkseid (1875) – bianco77 (1755), ChessWorld.net, 2008. (=1.Nf3 d5 2.b4 c6 3.Bb2 Bg4)

5.Be5 Bf5 (5...Nf6 6.h3 Bf5 7.Nd4+=) 6.d3 (6.Be2 Nf6+/–) 6...Nd7 7.Bc3 Ngf6 8.Be2 Bd6 9.0–0 0–0 10.Nbd2 (10.a4 Bg4+=) 10...Re8 (10...Qc7 11.Rb1+=) 11.Nb3 (11.a4 Qc7+=) 11...Nb6 (11...Bg4!?+=) 12.a4 Nbd7 13.h3 (better is 13.Nbd4 Bg6 14.a5+/–) 13...b6? (better is 13...Qe7!?+=) 14.Nbd4 (14.Nfd4 Be6+/–) 14...Bg6 (14...Be6 15.Nc6 Qc7 16.b5+–) 15.Nc6 Qc7 16.b5 a6 (16...Nb8 17.Nfd4+–) 17.Bb2 (17.Qd2 a5+–) 17...h6 (17...Nb8 18.Nfd4+–) 18.Qd2 Ra7? (18...Nb8 19.Ncd4+–) 19.Qc1 (better is 19.Na7 Qa7 20.ba6 Qa6 21.Rfb1+–) 19...Raa8 20.Ba3 (20.Re1 ab5 21.ab5 Ra1 22.Qa1 Bh5+–) 20...Ba3 21.Qa3 ab5 22.Ne7 Re7 23.Qe7+– Re8 24.Qb4 Qc2 25.Nd4 Qc7 26.Qb5 Rb8 27.Rfc1 Qe5 28.Nc6 Qd6 29.Nb8 Qb8 30.a5 Bf5 31.a6 Qa7 32.Qc6 Nb8 33.Qd6 Kh7 34.Qc7 Qc7 35.Rc7 (35...Na6 36.Ra6+–) 1–0. 1805DYDIDIDY – Falcor, mySchach.de, 2005.

4.Ne5 Bf5

5.d4 Nd7 6.Nd7 Qd7 7.e3 e6 8.a3 a5 9.Qd2 (9.ba5 Ra5 10.c4 dc4 11.Bc4 Bd6+=) 9...ab4–/+ 10.ab4 Ra1 11.Ba1 Nf6 12.f3 Bd6 13.Be2 h5 (13...0–0 14.Bc3–/+) 14.b5 Qc7 15.f4?? (better is 15.g3–/+) 15...Ne4–+ 16.Qd1 Qa5 (16...Qa5 17.Bc3 Nc3 18.Nc3 Qc3 19.Kf2 c5–+ (worse is 19...Qc2 20.Qc2 Bc2 21.bc6 bc6 22.Rc1–+)) 0–1. Kreuzer – Martin, 1980.

5.e3 e6 6.a3 Nf6 7.g4 Bg6 8.Ng6 hg6 9.d3 Bd6 10.Nd2 Rh2 (10...Bh2? 11.Be5+–) 11.Rh2 Bh2 12.g5 Nh5 13.c4 Qg5?? (better is 13...Bd6 14.c5 Bc7+=) 14.Nf3+– Qh6 15.Nh2 Nf6 16.Nf3 Nbd7 17.Qb3 Qh5 18.Be2 Qh1 19.Kd2 Qg2 20.cd5 cd5 21.Rf1 Ke7 22.Qc2 Kd8 23.Rc1 Ke7 (23...Ne8 24.Ne5 Ne5 25.Be5+–) 24.Qc7 Ne8 (24...b6+–) 25.Qb7 (25.Qb7 Rb8 26.Qa7+–) 1–0. hermax (1780) – sbells, gameknot.com, 2012.

4.Ne5 Bh5

5.a3 f6 6.g4 fe5 7.gh5 Qd6 =.

5.f4 e6+= 6.a3 Nd7 7.g3 Ngf6 8.Bg2 Qb6 9.d4 a5 10.c3 Bd6 (10...Ne5 11.fe5 Nd7 12.Nd2+=) 11.Nd2 (11.c4 Qc7= (11...ab4 12.Nd7 Nd7 13.c5 Nc5 14.dc5 Bc5 15.Bg7+=)) 11...0–0 (11...Be5 12.fe5 Ng4 13.e4–/+) 12.Ndf3 Rfd8 13.h3 (13.c4 Be7+=) 13...Bg6 (13...Bf3 14.Bf3 c5 15.bc5 Qb2 16.cd6 Qc3 17.Kf2+=) 14.0–0 (14.Ng6 hg6 15.Ne5 c5=) 14...Ne4 (14...Bf5 15.e3+=) 15.Kh2 (15.Ng6 hg6 16.Qe1 c5+=) 15...Ndf6 (15...Ne5 16.Ne5 Be5 17.fe5 ab4 18.ab4+=) 16.g4 (16.Ng6 hg6 17.Ng5 ab4 18.Ne4 Ne4 19.ab4 Ra1 20.Qa1 g5=) 16...Qc7 17.e3 Nd7 18.Nh4 Be5 (18...ab4 A) 19.Nhg6? bc3 (19...fg6?! 20.cb4 g5 21.Be4 de4 22.Qb3+=) 20.Bc3 Nc3–+ (20...fg6?! 21.Be4 de4 22.Qb3+=); B) 19.cb4 Ndf6 20.Kg1=) 19.fe5= f6 20.Ng6 hg6 21.Be4 de4 22.Qc2 f5 (22...fe5 23.Qe4 ed4 24.Kg2 de3 25.Qe6 Kh7 26.Qe3=) 23.Qb3 (23.gf5 ef5 24.Rg1 Nf8+=) 23...Ne5 24.Qe6 (24.de5 Rd2 25.Kg1 Qe5–+) 24...Nf7= 25.Kg2 Rd6 26.Qc4 Qd7 27.Rf4 Rf6 28.Raf1 Kh7 29.h4 (29.Qe2 Nd6=) 29...b5 30.Qe2 Nd6 31.g5 Rff8 32.Rh1 a4 (better is 32...Rh8!?–/+) 33.h5= Rh8 34.Rfh4 Nf7 35.c4 Qe7 36.hg6 Kg6= 37.Rh5 bc4 38.R1h3 Qe6 39.Bc3 Rad8 40.Kf1 Qd6 41.Kg2 f4 42.Qg4 f3–/+ 43.Kf2 Qd5 44.R3h4? Qf5–+ 45.Qf5 Kf5 46.Rh8 Rh8 47.Rh8 Nh8 48.d5 cd5 49.Bg7 Nf7 50.b5 Nd6 51.b6 Kg5 52.Be5 Nb7 53.Kg3 Kf5 54.Bc3 Ke6 55.Be1 Kd6 56.Bc3 Kc6 57.Bd4 c3! 58.Bc3 Kb6 59.Be1 Kb5 60.Kf4 Kc4 61.Ke5 Nc5 (61...Nc5 62.Bh4 Nd3 63.Kf5 f2 64.Bf2 Nf2–+) 0–1. Pachon,Adriana (2060) – Salcedo,Diana (1990), Bagre COL, Women Ch, 2014.

5.g4 Bg6 6.h4 h5 7.Ng6+/– fg6 8.g5 (8.gh5 gh5 9.c4 Nf6+/–) 8...Qd6 (8...e6 9.c4+/–) 9.a3 (9.c4 Nd7 10.cd5 Qd5+/–) 9...e5 10.e3 (10.c4 Nd7+/–) 10...Ne7+= 11.Qf3 Nd7 12.Bh3 e4 13.Qe2 Ne5 14.Bg2 Nf5 15.d3 ed3 16.cd3 Be7 17.e4? (better is 17.Nd2!? 0–0–0 18.Bh3=) 17...de4–/+ 18.Be4 (18.de4 Nh4! 19.Rh4 Nd3 (worse is 19...Bg5 20.Rh3+=) 20.Kf1 Nb2–/+) 18...0–0 19.Nd2 (19.Bf5 Rf5 20.Rh3 Re8–/+) 19...Nd4–+ 20.Bd4 Qd4 21.0–0 (better is 21.Rb1 Rad8 22.b5–+) 21...Ng4?? (21...Rf4 22.Nb3 Qd6 23.Rae1 Nd3 24.Bd3 (24.Qd3?? Rg4 25.Kh1 Rh4 26.Kg2 Qh2 27.Kf3 Rh3 28.Ke2 Rd3 29.Bd3 Rd8 30.Bc4 Kh7–+) 24...Rg4 25.Qg4 hg4 26.Nc5–+) 22.Nc4? (22.Nf3 Qd6 23.Rfc1 Rae8–/+) 22...b5 (22...Rf2 23.Rf2 Nf2 24.Qb2 Qb2 25.Nb2 Ne4 26.de4–+) 23.Ne3? (23.Qb2!? Qd7 24.Ne3+=) 23...Rf2–/+ 24.Rf2 Qa1 25.Rf1 Qd4 26.Rf3 Rf8 (26...a5!? 27.Qa2 (27.Bc6?? Rf8 28.Qa2 Kh7–+) 27...Kh8 28.Bc6–+) 27.Kg2–/+ Rf3 28.Kf3 Ne5 29.Kg2 c5 (29...Bd8!? 30.Nc2 Qd6–/+) 30.Nd5= Bd6 31.Qf2 Qc3 1–0. Melderis,Uldis (2105) – Ziurkus,Vaidas, it Baltija Cup Open, 2008.

4.h3 Bf3

5.ef3 a5 6.b5 Nf6 7.bc6 bc6 8.Bd3 Nbd7=+ 9.0–0 e5 10.Re1= Bc5 11.Be5+= Ne5 12.Re5 Kf8 13.Nc3 Bd4 14.Re1 Nh5 15.Qb1 Qg5 16.Qb7 Rd8 17.Bf1 a4 18.Rab1 Nf4 19.h4 Qh4 20.Nd1 Qg5 21.c3 Nh3 22.Kh2 Nf2 23.cd4 Qh4 24.Kg1 Nh3 25.gh3 Qg3 Theme: Double Attack 26.Kh1 Qe1 27.Ne3 Qg3 28.Qc6 h5 29.Nd5 Rh6 30.Qa4 g5 31.Qb4 Kg7 32.Ne7 Rf6 33.Bg2 Rf3 34.Qc5 Qf4 35.Kg1 Rf2 36.Rf1 Rf1 37.Bf1 Re8 38.Nf5 Kg8 39.Qd5 Re1 40.Ne3 Ra1 41.Kg2 h4 42.Qe5 Ra2 43.Qf4 gf4 44.Nc4 Ra7 45.d5 Kg7 46.d6 Kf8 47.Kf3 Ra8 48.Kf4 Re8 49.Bd3 Rb8 50.Kg4 (50...Rb4 51.Kh4+–) 1–0. Registration (2360) – ImBehindYou (2305), ICC, 2003.

5.ef3 e6 6.Be2 Nf6 7.a3 Nbd7 8.0–0 Bd6 9.c4 dc4 10.Bc4 Nb6 11.Bb3 0–0 12.Nc3 Nbd5 13.Ne4 Be7 14.Rc1 a5 15.ba5 Qa5 16.a4 Qd8 17.g3 h6 18.Qc2 Nb4 19.Qc4 Nbd5 20.Qc2 Nb4 21.Qc4 Nbd5 ½–½. Onoprienko,Elena (1975) – Kalashnikova,Larisa (2025), RUS–ch Seniors (Women), 2009.

5.ef3 Nf6 6.a3 =.

3.g3 Bf5

4.Nf3 a5 A) 5.Nd4 Be4 (5...Bg6 6.b5 Nf6 7.Bh3 Qb6 8.a4 Nbd7 9.0–0 e6 10.d3 Bc5; 5...Bc8 6.ba5 Qa5 7.Bg2 Nf6 8.0–0 Nbd7 9.Nc3 Ne5 10.d3 h5) 6.f3 Bg6 7.ba5 Nd7 8.Nb3 Ngf6 9.Nc3 e6 10.e3 Bd6; B) 5.b5 cb5 (5...Nf6 6.Nc3 cb5 7.Nb5 Nc6 8.Bg2 e6 9.0–0 Bc5 10.d4 Be7) 6.Nd4 Nh6 7.Nb5 Na6 8.Bg2 Rc8 9.N1a3 e6 10.Rc1 Qd7; C) 5.ba5 Nf6 (5...Qa5 6.Nc3 Nf6 7.Bg2 Nbd7 8.0–0 e5 9.d4 Bb4 10.Nh4 Bg4) 6.Nd4 Be4 7.f3 Bg6 8.Nb3 Nbd7 9.Nc3 e6 10.e3 Bd6.

4.Nf3 Na6 A) 5.b5 cb5 (5...Nc5 6.Bd4 Ne6 7.bc6 bc6 8.Bg2 Nd4 9.Nd4 Bd7 10.Nc3 Nf6) 6.Nc3 b4 7.e4 de4 8.Bb5 Bd7 9.Bd7 Qd7 10.Ne4 Nf6; B) 5.a3 Nf6 (5...e6 6.Nd4 Nf6 7.Nc3 Bd6 8.Nf5 ef5 9.e3 0–0 10.Bd3 g6; 5...c5 6.e3 Nf6 7.Ba6 ba6 8.bc5 e6 9.c6 Rc8 10.Nc3 Bd6) 6.Nc3 c5 7.bc5 Nc5 8.e3 Rc8 9.Bb5 Bd7 10.0–0 e6.

4.Nf3 Nd7 A) 5.Nc3 e5 (5...Ngf6 6.Nh4 Be4 7.f3 Bg6 8.b5 e6 9.Rb1 Bd6 10.e3 Bh5; 5...Nh6 6.a3 e5 7.Bg2 d4 8.Na4 Qc7 9.c3 d3 10.c4 Be7) 6.b5 Ngf6 7.bc6 bc6 8.e3 Bd6 9.Bd3 Bg4 10.Be2 0–0; B) 5.b5 Ngf6 6.e3 e6 7.Nc3 Bc5 8.Nh4 Bg4 9.f3 Bh5 10.Be2 g5; C) 5.Bg2 Ngf6 (5...e6 6.b5 Ngf6 7.0–0 cb5 8.Nc3 b4 9.Nb5 Bc5 10.Nfd4 0–0; 5...Qb6 6.Bd4 Qb4 7.Nc3 Qa5 8.Rb1 0–0–0 9.0–0 e5 10.Be5 Ne5) 6.Nh4 Be4 7.f3 Bg6 8.Nc3 e6 9.b5 Ne5 10.bc6 bc6; D) 5.e3 Ngf6 (5...e6 6.b5 Ngf6 7.Nd4 Bd6 8.Nc3 0–0 9.Nf5 ef5 10.Be2 Nc5) 6.b5 e6 7.Nd4 Bd6 8.Nf5 ef5 9.Be2 0–0 10.Nc3 Nc5.

4.Nf3 e6 A) 5.a3 Nd7 (5...Nf6 6.Nh4 Nbd7 7.Nf5 ef5 8.e3 Bd6 9.Nc3 0–0 10.Be2 Re8; 5...a5 6.Nd4 Bg6 7.Nc3 Nf6 8.Bg2 e5 9.Nf3 ab4 10.ab4 Nbd7; 5...Nh6 6.Bg2 a5 7.0–0 ab4 8.ab4 Ra1 9.Ba1 Qb6 10.Nc3 Nd7) 6.Nd4 Be4 7.f3 Bg6 8.Bh3 Ngf6 9.Nc3 a5 10.f4 ab4; B) 5.Nc3 Nf6 6.Nd4 Bb4 7.a3 Bd6 8.Nf5 ef5 9.e3 Nbd7 10.Be2 0–0; C) 5.Nh4 Nf6 (5...Bg6 6.Bg2 Nf6 7.a3 Nbd7 8.0–0 a5 9.b5 cb5 10.Nc3 Qb6; 5...Nh6 6.Bg2 Nd7 7.0–0 Nf6 8.b5 Bc5 9.c4 0–0 10.d4 Be7; 5...Bg4 6.Nc3 Bb4 7.f3 Bh5 8.Nd5 cd5 9.Bg7 Be7 10.Bh8 Bh4; 5...Be4 6.f3 Bg6 7.Bd4 Nd7 8.a3 e5 9.Bf2 Ngf6 10.Nc3 a5) 6.Nf5 ef5 7.Bh3 g6 8.b5 Bd6 9.Nc3 0–0 10.Bg2 Nbd7; D) 5.Nd4 Be4 (5...Bg6 6.Nc3 Bb4 7.Bg2 Nf6 8.0–0 Nbd7 9.a3 Bd6 10.d3 e5; 5...Nf6 6.b5 Bg6 7.e3 a6 8.bc6 Nc6 9.Nc6 bc6 10.Nc3 Bd6; 5...Nh6 6.a3 Bd6 7.Nc3 Nd7 8.Bg2 Bg6 9.0–0 0–0 10.e4 Nb6) 6.f3 Bg6 7.a3 e5 8.Nb3 Nd7 9.Nc3 Ngf6 10.e3 Bd6.

4.Nf3 Nf6 A) 5.Nh4 Bg4 (5...Bc8 6.Bg2 a5 7.ba5 Ra5 8.Bc3 Ra6 9.0–0 Nbd7 10.d3 e6; 5...Bd7 6.e3 e6 7.a3 a5 8.Nc3 Na6 9.b5 Nc5 10.bc6 Bc6; 5...Be6 6.Bg2 a5 7.ba5 Ra5 8.Bc3 Ra8 9.0–0 d4 10.Bb2 Qb6; 5...Be4 6.f3 Bg6 7.e3 e6 8.a3 Nbd7 9.Nc3 Bh5 10.Be2 Bd6) 6.Bg2 Qb6 7.h3 Bc8 8.a3 a5 9.Nc3 ab4 10.ab4 Ra1; B) 5.a3 Nbd7 (5...a5 6.b5 cb5 7.Nc3 Nc6 8.Nb5 e6 9.Bg2 Bc5 10.0–0 0–0) 6.e3 e6 7.Nc3 Bd6 8.Nd4 0–0 9.Nf5 ef5 10.Be2 Re8; C) 5.Bd4 Nbd7 (5...e6 6.Nh4 Bb4 7.Nf5 ef5 8.c3 Bd6 9.Bh3 0–0 10.Qb3 b6; 5...a5 6.ba5 Nbd7 7.Nc3 Ra5 8.Bg2 e5 9.Ne5 c5 10.Nd7 Nd7; 5...e5 6.Be5 Bb4 7.c3 Bd6 8.d4 0–0 9.Qb3 Qc7 10.Bd6 Qd6) 6.Nc3 Qc7 7.Bf6 Nf6 8.e3 e5 9.Rb1 Bd6 10.Bd3 Bg4; D) 5.Nc3 e5 (5...Nbd7 6.Nh4 Be4 7.Ne4 de4 8.Bh3 e6 9.Rb1 a5 10.ba5 Qa5; 5...e6 6.a3 Nbd7 7.Nd4 Bd6 8.Bg2 0–0 9.0–0 Bg6 10.e3 e5) 6.Ne5 Bb4 7.Nf3 0–0 8.Bg2 c5 9.Na4 Nbd7 10.0–0 Qc7.

4.Nf3 h6 5.Bg2 Nf6 6.0–0 e6 7.a3 Bd6 8.d3 0–0 9.c4 Nbd7 10.Nbd2 b6 (10...e5!?=) 11.Nd4+= Qc7? (better is 11...Rc8+=) 12.cd5+– cd5 (12...Nd5?? 13.e4 Bh7 14.ed5 ed5 15.N2f3+–) 13.Rc1 Qb7 14.Nf5 ef5 15.Nc4! Bc7 (15...dc4 16.Bb7) 16.Ne3 f4 17.Nd5! Nd5 18.Qb3 Rad8 19.Bd5 (worse is 19.Qd5 Qd5 20.Bd5 Bd6+–) 19...Qb8 20.e3 fg3 21.fg3 Bg3 22.Rc2 (22.hg3?! Qg3 23.Bg2 Qe3 24.Kh1 Ne5+–) 22...Bh4 (22...Be5 23.Bf7 Kh8+–) 23.Rg2 Bg5 (23...Nf6 24.Bf6 Bf6 25.Rf6 Qe5 26.Bf7 Kh8+–) 24.Rg5! hg5 25.Bf7 Kh8 26.Qe6 Rf7 27.Rf7 1–0. gioco1b4 – GoldbergVariations, ChessWorld.net, 2012.

4.Bg2 a5 5.b5 cb5 (5...Nf6 6.Na3 Qb6 7.Rb1 cb5 8.Nf3 b4 9.Bd4 Qa6 10.Bf6 Qf6) 6.Nc3 Nf6 7.Nb5 Nc6 8.Nf3 e6 9.0–0 Bc5 10.Bf6 gf6.

4.Bg2 Na6 5.a3 (5.Nf3 Nb4 6.Nd4 Be4 7.0–0 e5 8.Be4 de4 9.Nb3 Qg5 10.Na3 0–0–0) 5...Nf6 (5...c5 6.c4 cb4 7.Nf3 Nf6 8.Ne5 e6 9.0–0 Bd6 10.Qa4 Nd7; 5...e6 6.Nf3 Nf6 7.0–0 Bd6 8.Nc3 Qd7 9.b5 cb5 10.Nd4 Nc7) 6.Nf3 e6 7.0–0 Bd6 8.Nc3 0–0 9.d3 h6 10.Qd2 Qe7.

4.Bg2 Qb6 A) 5.a3 a5 (5...Nd7 6.Nf3 Ngf6 7.Nc3 e6 8.Nh4 Bd6 9.Nf5 ef5 10.0–0 0–0; 5...Nf6 6.Nf3 Nbd7 7.0–0 e6 8.Nh4 Bd6 9.Nf5 ef5 10.Nc3 0–0; 5...e6 6.Nf3 Nf6 7.Nc3 Nbd7 8.0–0 Bd6 9.e3 0–0 10.Nh4 Bg4) 6.Nc3 Nf6 7.Na4 Qb5 8.Nc3 Qb6 9.Na4 Qb5 10.Nc3 Qb6; B) 5.Nf3 Qb4 (5...Nd7 6.Bd4 Qc7 7.Nh4 Bg4 8.h3 e5 9.hg4 ed4 10.c3 0–0–0) 6.Bc3 Qa4 7.d3 Nf6 8.Bd2 Nbd7 9.Nc3 Qa3 10.Rb1 0–0–0; C) 5.Nc3 Nd7 (5...a5 6.a3 Nf6 7.Na4 Qb5 8.Nc3 Qb6 9.Na4 Qb5 10.Nc3 Qb6; 5...Nf6 6.a3 a5 7.Na4 Qb5 8.Nc3 Qb6 9.Na4 Qb5 10.Nc3 Qb6; 5...Nh6 6.e3 Qb4 7.Rb1 Nd7 8.Nge2 0–0–0 9.a3 Qd6 10.Nd4 Bg6; 5...Qb4 6.Rb1 Nd7 7.Nf3 0–0–0 8.Nh4 Nh6 9.0–0 Nc5 10.a3 Qa5) 6.a3 d4 7.Na4 Qa6 8.c4 e5 9.f4 ef4 10.Bd4 Ngf6.

4.Bg2 e6 A) 5.a3 a5 (5...Nf6 6.Nf3 Nbd7 7.0–0 Bd6 8.Nc3 0–0 9.Nd4 Bg6 10.e3 a5) 6.Nf3 Nf6 7.b5 Nbd7 8.0–0 Bc5 9.d4 Bd6 10.c4 Qb6; B) 5.Nc3 Nf6 (5...d4 6.Na4 a5 7.Nc5 ab4 8.Nb3 c5 9.Bb7 Ra7 10.Bg2 Nf6) 6.a3 a5 7.Nf3 ab4 8.ab4 Ra1 9.Qa1 Na6 10.b5 Nb4; C) 5.b5 a6 (5...cb5 6.Nf3 Nc6 7.Nc3 b4 8.Nb5 Nf6 9.0–0 Be7 10.Nfd4 Bg6; 5...Nf6 6.Nf3 a6 7.a4 Bc5 8.0–0 ab5 9.ab5 Ra1 10.Ba1 0–0) 6.a4 ab5 7.ab5 Ra1 8.Ba1 Qa5 9.Bc3 Qa4 10.d3 cb5; D) 5.Nf3 Nf6 6.b5 a6 7.a4 Bc5 8.Nh4 0–0 9.Nf5 ef5 10.0–0 Re8.

4.Bg2 Nf6 A) 5.a3 a5 (5...e6 6.Nf3 Nbd7 7.Nc3 Bd6 8.0–0 0–0 9.d3 a5 10.Qd2 ab4; 5...Nbd7 6.Nf3 e6 7.Nc3 Bd6 8.d3 0–0 9.Qd2 a5 10.0–0 ab4) 6.Nf3 ab4 7.ab4 Ra1 8.Ba1 Na6 9.b5 cb5 10.Nh4 Bg4; B) 5.Nf3 e6 (5...Nbd7 6.0–0 e5 7.Ne5 Ne5 8.Be5 Bb4 9.Nc3 Qe7 10.Bd4 0–0) 6.a3 Nbd7 7.0–0 Bd6 8.Nc3 0–0 9.Nd4 Bg6 10.d3 a5.

4.Bg2 Nd7

5.Nc3 e5 6.b5 Ngf6 7.Nf3 cb5 8.Nh4 Be6 9.e4 Ne4 10.Ne4 de4.

5.Nc3 Ngf6 6.Nf3 e5 7.Na4 Bb4 8.Ne5 Qa5 9.Nd7 Kd7 10.Nc3 d4.

5.Nf3 e5 6.Ne5 Ne5 7.Be5 Nf6 8.b5 Bc5 9.bc6 bc6 10.d4 Bd6.

5.Nf3 e6 6.b5 Ngf6 7.Nd4 Bd6 8.c4 Bg6 9.bc6 bc6 10.cd5 ed5.

5.Nf3 f6 6.0–0 Nh6 7.Nc3 e5 (7...e6 8.a3 Qb6 9.d3 Bd6 10.e4 Bg4 11.Na4 Qa6; 7...Nb6 8.Nd4 Nc4 9.Bc1 Qb6 10.Nf5 Nf5 11.e4 de4) 8.Nh4 Bb4 9.Nf5 Nf5 10.e4 de4 11.Ne4 g6.

5.Nf3 f6 6.Nc3 e5 7.e4 (7.b5!?+= Bb4 (7...Bc5 8.0–0 Ne7 9.e4 de4 10.Nh4 Be6 11.Ne4 0–0) 8.0–0 Ne7 9.bc6 bc6 10.a3 Bc3 11.Bc3 d4; 7.a3 d4 8.Na2 Nb6 9.0–0 g5 10.e3 Nc4 11.Bc1 d3) 7...de4 (7...Be4 8.b5 cb5 9.Qe2 Kf7 10.Ne4 de4 11.Qe4 Nc5) 8.Nh4 Bg6 (8...Be6 9.Ne4 (9.Be4 Nh6 10.b5 Nc5 11.bc6 Ne4) 9...g5+= 10.Nf3 g4 11.Nh4 Bb4) 9.Ng6 (9.Ne4 f5 (9...Bb4 10.Ng6 hg6 11.a3 Bc5) 10.Nc5 Bc5 (10...Nc5 11.bc5 e4) 11.bc5 Qe7+= (11...Qa5=)) 9...hg6+= 10.Qg4 (10.Be4 f5 11.Bf3 (11.Bg2 Bb4) 11...Bb4= (11...e4 12.Ne4 fe4 13.Be4 Qe7–/+); 10.Ne4?! f5 11.Nc5 Bc5 12.bc5 Ngf6+=) 10...g5 (10...Bb4 11.Qg6 Kf8 12.Qe4+=; 10...Kf7 11.Qe4 Nb6) 11.Be4 (11.a3 g6 12.Qe4 Ne7+/–) 11...Kf7 (11...Ne7!?+/–) 12.Bf5+– Ke7 (better is 12...Nb6 13.Be6 Ke7+–) 13.Qc4 Qc7?? (13...Qc8 14.Qb3 Nh6+–) 14.Nd5! (14.Nd5 Kd8 15.Nc7 Kc7 16.Bd7 Kd7 17.d4+–) 1–0. pierre – exxe, internet, 2011.

5.Nf3 f6 6.Nc3 Nh6 A) 7.0–0 e5 (7...Nb6 8.d3 e5 9.a3 Be6 10.Qd2 Kf7 11.Nh4 Bd6; 7...e6 8.b5 Bc5 9.d4 Bb4 10.bc6 bc6 11.Nh4 0–0; 7...Qb6 8.b5 e5 9.bc6 bc6 10.Rb1 Bb4 11.Nh4 0–0) 8.Nh4 Bb4 9.Nf5 Nf5 10.e4 de4 11.Be4 Nd4; B) 7.b5 e5 (7...e6 8.0–0 Bc5 9.d4 Bb4 10.bc6 bc6 11.Nh4 0–0) 8.Nh4 Nc5 9.Nf5 Nf5 10.bc6 bc6 11.0–0 Rb8; C) 7.a3 a5 (7...e6 8.0–0 Qb6 9.d3 0–0–0 10.e4 de4 11.Ne4 Be4; 7...Qb6 8.0–0 0–0–0 9.e3 e5 10.Qe2 e4 11.Nd4 Ne5; 7...Kf7 8.0–0 e5 9.Nh4 Be6 10.e3 Bd6 11.Qh5 g6; 7...e5 8.Nh4 Be6 9.e3 Bd6 10.Qh5 g6 11.Qe2 0–0) 8.b5 Nc5 9.e3 Rb8 10.Rb1 e5 11.0–0 Kf7.

5.Nf3 Ngf6 6.0–0 e6 7.a3 Bd6 8.d3 0–0 9.Nbd2 e5 10.Re1 e4 (10...a5 11.e4 Bg4 12.ed5 cd5 13.ba5 Qa5 14.h3 Bf3 15.Bf3=+) 11.Nd4 Bg6 12.de4 Ne4 13.Ne4 Be4 14.Be4 de4 15.Nf5 Be5 16.Be5 Ne5 17.Nd6 Qc7 18.Ne4 Rad8 19.Qc1 Nc4 20.Qg5 f5 21.Nc5 Rd6 22.Red1 b6 23.Nd3 Qd7 24.c3 Re8 25.Kf1 Qe6 26.Nf4 Qd7 27.Nd3 h6 28.Qh5 g5 29.Nb2 Kg7 30.Rd6 Nd6 31.Rd1 Re6 32.Qf3 Qc7 33.c4 Kg6 34.Qc3 Qe7 35.e3 Nf7 36.Kg2 g4 37.Nd3 h5? 38.Nf4+– Kh6 39.Ne6 Qe6 40.Qd4 Kg6 41.Qf4 Ne5 42.Rd8 Nf7 43.Rd4 Ne5 44.c5 bc5 45.bc5 Nf7 46.Qc7 Kg5 47.Rf4 Ne5 48.Qd8 Kg6 49.Qd6 Kf6 50.Qe6 Ke6 51.Ra4 Nd3 52.Ra7 Nc5 53.Rh7 Na4 54.Rh5 c5 55.Rh6 Kd5 56.h4 gh3 57.Kh3 c4 58.Rh8 c3 59.Rd8 Kc4 60.Rd1 Nb2 61.Rc1 Nd3 62.Rc3 Kc3 63.f3 Ne1 64.g4 Nf3 65.gf5 Kd3 66.a4 Ke3 67.a5 Ng5 68.Kg4 Ne4 69.a6 Nd6 70.a7 (70...Ne4 71.a8Q Nf2 72.Kh4+–) 1–0. BlueNoteTokyo (2390) – angelofdeath (2580), Dos Hermanas Internet Section, 2003.

5.Nf3 Ngf6 6.0–0 e6 7.b5 Bd6 8.Nc3 0–0 9.Rb1 Rb8 10.Nd4 Ne5.

5.Nf3 h6 6.0–0 Qc7 7.c4 dc4 8.Na3 e6 9.Nc4 Ngf6 10.Qb3 Be7 11.d3 0–0 12.Rac1 a6 13.Bd4 Rac8 14.Nfe5 Ng4 (better is 14...Rfd8!?=) 15.Nd7+/– Qd7 16.Qb2 e5 17.Bc3 Qc7 18.Ne5 Nf6 19.f4 Rfe8 20.e4 Bd7 21.f5 Bf8 22.Bd4 b5 23.Nf7! Kh7?? (23...Kf7 24.Qb3 Double attack) 24.Bf6 Kg8 (24...Bf5 25.ef5 Qf7 26.Bd4+–) 25.Nh6! Kh7 (25...gh6 26.Qb3 Double attack) 26.Nf7 a5 27.Bd4 a4 (27...Be7 28.Qe2 Kg8+–) 28.Qe2 Re7 29.Qh5 Kg8 30.Ng5 (30.Ng5 Bf5 31.Rf5 Qg3 32.Qh7) 1–0. marekt – chudi, internet, 2012.

5.Nf3 h6 6.a3 Ngf6= 7.0–0 e6 8.Nd4 Bg6 9.Nc3 e5 10.Nf3 Bd6.

5.Nf3 h6 6.b5 Ngf6 7.0–0 cb5 8.Nc3 e5 9.d4 e4 10.Ne5 b4.

5.Nf3 h6 6.Nc3 Ngf6 (6...e6 7.b5 Ngf6 8.Nd4 Bd6 9.Nf5 ef5 10.Bh3 g6) 7.b5 e6 (7...e5 8.bc6 (8.0–0 Bd6 9.Nh4 Be6 10.e4 0–0) 8...bc6 9.e3+= (9.0–0 Bd6 10.Rb1 0–0) 9...Bd6 10.0–0 0–0) 8.0–0 (8.Nd4 Bd6 9.Rb1 0–0 10.0–0 Ne5) 8...e5 (8...Bd6 9.Nd4 0–0 10.Rb1 Ne5) 9.d4 (9.Nh4 Be6 10.Rb1 Qc7) 9...e4 (9...Bd6 10.e4 de4) 10.Nh4 Bh7 11.f3 (better is 11.bc6 bc6 12.Bh1–/+) 11...Be7?? (better is 11...g5 12.bc6 bc6 (12...gh4?! 13.cd7 Qd7 14.fe4 Ne4 15.Ne4 de4 16.gh4+=) 13.fe4 gh4 14.ed5 c5–+) 12.fe4= Ne4 13.Ne4 Be4 14.Be4 Bh4 15.Bg2 Bf6 16.e4 0–0 17.bc6 bc6 18.ed5 cd5 19.Bd5 Nb6? 20.Ba8+– Qa8 21.Qd3 Rd8 22.Rae1 Qc6 23.Rf4 Nd5 24.Rf2 Nb4 25.Qb3 a5 26.a3 Na6 27.d5! Qd6 28.Bf6 gf6 29.Qf3 1–0. mrkt – ihabz, internet, 2011.

3.g3 Nf6

4.a3 a5 5.ba5 Qa5 6.Nf3 Nbd7 7.Bg2 Qb6 8.Ra2 Qc7 9.0–0 e5 10.d4 e4 11.Nfd2 b5 12.f3 e3 13.Nb3 Nb6 14.Qd3 Nc4 15.Bc1 h5 16.Be3 h4 (16...Bf5! 17.Bf4 Qf4 18.gf4 Bd3 19.cd3 Na3+=) 17.Bf4+= Bd6 18.Bd6 Qd6 19.g4 h3 (worse is 19...Na3 20.e4 h3 21.e5+/–) 20.Bh1 Rh4 (worse is 20...Na3 21.Nc5 b4 22.c3+/–) 21.N1d2 Ng4 (21...Bg4!? 22.fg4 Rg4 23.Kf2 Nd2 24.Qd2 Rf4 25.Ke1 Rf1 26.Kf1 Qh2 27.Qe3 Kf8=) 22.fg4= Rg4 23.Kf2 Bf5 24.e4 de4 (24...de4 25.Ne4 Qh2 26.Ke1 Kf8–+) 0–1. marekt – Edward_Scott87, internet, 2012.

4.a3 Bf5 =+.

4.Nf3 Qd6 =+.

4.Bg2 Nbd7 5.Nf3 Qc7 6.0–0 e5 7.a3 e4 8.Nd4 Ne5 9.d3 Bd6 10.Nd2 Neg4 11.de4+/– de4 12.Ne4 Ne4 13.Be4 Be5 14.c4 Bd7 15.Qc2 g6 16.Rad1 0–0–0 17.a4 White prepares b5 17...f5 18.Bg2 Rhe8 19.b5 c5 20.Nb3 Bb2 21.Qb2 Ne5 22.Rd5 Nc4?? 23.Qc3+– Kb8 24.Rc5 Qd6 25.Rc4 Be6 26.Rd4 Qa3 27.Rd8 Rd8 28.Rc1 Qb3 29.Qc7 (29...Ka8 30.Qb7#) 1–0. Wall,Bill – Regg, Internet, 2003.

4.Bg2 e5 5.Be5 Bb4 6.Nf3 +=.

4.Bg2 e6 5.a3 Nbd7 6.d4 (6.Nf3 Bd6+=) 6...Bd6 (6...a5 7.c3+=) 7.Nf3 (7.c4 dc4 8.Nd2 b5+=) 7...Qc7 (7...a5 8.ba5 Qa5 9.Nbd2–/+) 8.Nbd2 0–0 (8...b5 9.0–0=) 9.0–0 (9.c4 Be7=) 9...e5 (9...Nb6 10.Qb1+=) 10.de5= Ne5 11.Ne5 (11.c4 dc4 12.Ne5 Be5 13.Be5 Qe5 14.Nc4 Qe6=) 11...Be5+= 12.Be5 Qe5 13.Nf3 Qh5 14.Qd4 (14.Nd4 Bh3+=) 14...Bg4 (14...Re8 15.Rfe1+=) 15.Rfe1 Rfe8 16.Qd3 (16.Rac1 a5+=) 16...Ne4 (16...Bf5 17.Qd2–/+) 17.Nd4 c5 (17...Nd6 18.e3+=) 18.Nf3 (18.Nb5 c4 19.Qd4 Re5+=) 18...Rad8 (18...Rac8 19.Rab1+=) 19.c4 (19.bc5 Nc5 20.Qb5 Rc8+=) 19...dc4 (19...b6 20.cd5 Qd5 21.Rad1 Qd3 22.Rd3 Bf3 23.Rd8 Rd8 24.ef3+=) 20.Qc4 cb4 21.ab4 Rc8 (21...b5 22.Qc6 Rc8 23.Qb7=) 22.Qd3 Rc3 (22...a6 23.Ra5 Qh6 24.Re5=) 23.Qd1 (23.Qd4 Rc2+=) 23...h6 (23...a6!?=) 24.Ra7 (24.Ra5 b5 25.Ra7 Rcc8+=) 24...Qc5?? (better is 24...Qb5+=) 25.bc5+– (25.bc5 Rc5 26.Rb7+–) 1–0. mic (2200) – jasperchess (2020), net–chess.com, 2008.

4.Bg2 Bf5 5.e3 e6 6.a3 Bd6 7.Ne2 0–0 8.0–0 Nbd7 9.d4 (9.Nbc3 c5+=) 9...b5 10.Nd2 a5 11.c4 (better is 11.ba5!? Qa5 12.f3–/+) 11...bc4–+ (11...dc4?! 12.e4 ab4 13.ab4 Ra1 14.Ba1+=; 11...ab4?! 12.c5 ba3 13.Ba3–/+) 12.Nc4? (better is 12.ba5 Qa5 13.Qc1–+) 12...dc4 13.Bc6 Rc8 14.Bb5 (14.b5 Qb6–+) 14...Nd5 (14...ab4 15.ab4 Bb4 16.Bc3 Bc3 17.Nc3–+) 15.Nc3 (15.ba5 c3 16.Bc1 c2–+) 15...Nc3 (15...ab4!? 16.ab4 Bd3 17.Ba6–+) 16.Bc3 ab4 17.ab4 Nf6 18.Ba6 Ra8 19.Bc4 (19.Bc4 Rc8 20.Qe2–+). alaamattar (2165) – eujogoxadrez (1850), net–chess.com, 2012.

4.Bg2 Bg4 5.a3 e6 6.d3 (6.h3 Bf5+=) 6...a5 7.c3 (7.h3 Bf5+=) 7...d4 (7...ab4 8.ab4 Ra1 9.Ba1+=) 8.Nd2 (8.b5 dc3 9.Nc3 Bd6=) 8...Na6 (8...dc3 9.Bc3 Nd5 10.Bd4+=) 9.b5 dc3 (9...Nc5 10.Qb1 dc3 11.Bc3=) 10.Bc3 Nd5?? (better is 10...Nc5 11.f3 Nd5=) 11.ba6+– Nc3 12.Qc2 (12.ab7 Ra6 13.Qc2 Nd5+–) 12...Qf6 (12...Nd5 13.ab7 Rb8 14.Qc6 Ke7+–) 13.ab7+– Rb8 14.Bc6 (14.Rc1!? Bc5 15.Bc6 Kd8 16.Qc3 Bf2 17.Kd1 Qc3 18.Rc3 Bd4+–) 14...Kd8 15.Ngf3 (15.Rc1 Ba3 16.Qc3 Qc3 17.Rc3 Bb4+–) 15...Ne2? (better is 15...Nb5 16.Qc1 Nc3+–) 16.Ke2 Qe5 17.Be4 f5 (17...Rb7 18.Nc4 Rc7 19.Nce5 Rc2 20.Kd1+–) 18.Nc4 (18.Rac1!? Ba3 19.Ke1 Qd6+–) 18...Bf3 19.Kf3 (19.Kd2 Qd4 20.Bf3 Qf2 21.Be2 Rb7 22.Na5 Rc7 23.Nc6 Kd7 24.Ne5 Kd6+–) 19...fe4 20.de4 Qf6 (20...Qh5 21.Kg2 Rb7 22.Qd1 Qd1 23.Rhd1 Kc8 24.Na5+–) 21.Kg2 Rb7 22.Na5 (22.Rhd1!? Rd7+–) 22...Rb2 23.Rad1 (23.Rhd1 Ke8 24.Qa4 Kf7+/–) 23...Ke8 24.Qc8 Kf7 25.Rhf1 g5 (25...Qe5 26.Qd7 Be7 27.Qe7 Ke7 28.Nc6 Kf6 29.Ne5 Ke5 30.Rd7+–) 26.Rd8 (26.Nc4 Be7 27.Qc7 Ra2+–) 26...g4 27.Qd7 Kg6 (27...Be7 28.Rh8 Qh8 29.Nc4+–) 28.Qd3 (28.Re8 Kh5 29.Re6 Qf3 30.Kg1 Bh6+–) 28...Kf7 (28...Bg7 29.Rh8 Bh8 30.Nc4+–) 29.Nc4 Ra2 30.e5 Qh6 (30...Qg5 31.Qd7 Kg6 32.Qe6 Kh5 33.h3+–) 31.Nd6 Bd6 32.Rh8 (worse is 32.Qd6 Rd8 33.Qd8 Qh3 34.Kg1 Qh6+–; 32.Rd6?! Ra8+–) 32...Qh3 (32...Ra3 33.Rh7 Kg8 34.Qd6 Qh7 35.Qa3 Qe4 36.f3 Qe2 37.Rf2 Qe5 38.fg4 Qd5 39.Kh3+–) 33.Kg1 Kg7 34.Qd6 (34.Qd6 Qg3 35.fg3 Rg2 36.Kg2 Kh6 37.Qe6 Kg5 38.Rf5) 1–0. Fischer,P – Kluegel,Jens Uwe, Bad Zurzach op, 1995.

4.Bg2 g6 5.Nf3 Bg7 6.0–0 0–0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.g3 0–0 5.Bg2 d5 6.0–0 c6).

3.g3 Bg4

4.a3 Nd7 5.Bg2 (5.h3 Bf5=) 5...e5 6.Nf3 Bd6 7.d3 (7.0–0 Ngf6+=) 7...Qe7 (7...a5 8.b5+=) 8.Nbd2 (8.c4 Ngf6+=) 8...Ngf6 (8...a5 9.c4+=) 9.h3 (9.c4 e4 10.de4 de4=) 9...Bf3 10.Nf3 (10.Bf3!? a5 11.ba5 Ra5 12.c4+=) 10...Bb4!–/+ 11.ab4 (11.c3 Bc5–/+) 11...Qb4 Theme: Double Attack 12.Qd2 (12.Nd2 Qb2 13.Rb1 Qa3–+) 12...Qb2–+ 13.0–0 Qb6 14.Qg5 (14.c4 dc4 15.Rfb1 Qc7 16.dc4 0–0–+) 14...h6 15.Qd2 0–0 16.Rfb1 (16.c3 Qc7–+) 16...Qc7 17.Ra4 (17.c4 dc4 18.dc4 e4–+) 17...e4 (17...b5 18.Ra5–+) 18.Nh4 (18.Nd4 Nc5 19.Ra3 b6–+) 18…b5 (18...b5 19.Ra6 Nc5–+; 18...Rfe8 19.Nf5–+) 0–1. Harding,Timothy David – Grohde,Wolfgang, corr EU–ch M881, 1989.

4.Nf3 Bf3 5.ef3 e6 +=.

4.Bg2 Qd6 5.a3 +=.

4.Bg2 a5

5.b5 Qb6 6.a4 cb5 7.Nc3 e6 8.Nb5 Nf6 9.Be5 Na6 10.Rb1 Qc6 11.c4 Qc4 12.Rc1 Qa2 (12...Qb4 13.Rb1 Qc5 14.Rc1=) 13.Nf3 (better is 13.Rc2!? Qb3 14.h3+=) 13...Bf3 14.ef3 Rd8 15.Bf1 Nb4 16.Nc7 Ke7 17.Bb5 Nd7 18.Bc3 f6 19.0–0 Kf7 20.f4 h5 21.Qe2 Nc5 22.f5 Nc6? (22...ef5 23.Bb4 ab4 24.Nd5 g6 25.Rc5 Bc5+=) 23.fe6+– Kg8? (23...Ke7 24.Bc6 bc6 25.Ba5 Na4 26.Bb4 c5 27.Rc5 Qb2 28.Rb5 Qb4 29.Rb4 Nc5+–) 24.e7! Ne7 (24...Be7 25.Bc6) 25.Ne6 Ne6 26.Qe6 Kh7 27.Bd3 g6 28.Bf6 Qa3 29.Rc7 Kh6 30.Bb1 Rd6 31.Qe5 Rf6 32.Qf6 Rg8 33.h4 Qb4 34.Qg5 Kh7 35.Qh5 Kg7 36.Qe5 Kf7 37.h5 Ke8 38.Rc8 Kd7 39.Qc7 Ke6 40.Re1 Kf7 41.hg6 1–0. Bennett,Hilton Petrie (1945) – Hart,Ralph (2065), North Island–ch, 1999.

5.h3 Bh5 6.b5 (6.ba5 f6=) 6...a4 (6...Qb6 7.a4=) 7.a3 (7.Nf3 cb5 8.0–0 b4+=) 7...Qb6+= 8.c4 (8.Nc3!?+=) 8...dc4–/+ 9.Nc3 e6 (9...e5 10.Nf3 Bf3 11.Bf3 cb5 12.Nd5–/+) 10.bc6+= Nc6 (10...Qb2 11.c7 Na6 12.Rb1 Qa3 13.Bb7 Nc7 14.Ba8+–) 11.Rb1 (11.Ra2 Qa6–/+) 11...Bg6–/+ 12.e4 (better is 12.Ne4!? Nd4 13.f4–/+) 12...Ne5–+ 13.Bf1 Qc6 (13...Bc5!? 14.Rh2 Bd4 15.Be2–+) 14.Nf3–/+ Bd6 (14...Nf3 15.Qf3 Nf6 16.d3–/+) 15.Nd4 Qd7 16.f4 Nd3 17.Bd3 cd3 18.Qf3 Bc5 (18...Bb8 19.Ncb5–/+) 19.Ncb5+= Ne7 20.g4 (better is 20.Qd3 Rc8 21.Rc1+=) 20...f5?? (20...Nc6!? 21.Qd3 Rd8+=) 21.gf5 (21.Ne6 fe4 22.Nbc7 (22.Nc5?! ef3 23.Nd7 Kd7=) 22...Kf7 A) 23.Nc5?! Qc7 (23...ef3? 24.Nd7 Rac8 25.Ne5 Kg8 26.Ne6+–) 24.Ne4 Be4 25.Qe4 Qc6 26.Qc6 bc6=; B) 23.Qg3+/–) 21...ef5+= 22.e5 (22.Ne6 Rc8 23.Ng7 Kf7 24.ef5 Nf5 25.Nf5 Rhe8 (25...Qb5?? 26.Qd5 Ke8 27.Qe6 Kd8 28.Bf6 Kc7 29.Be5 Kd8 30.Rb5+–) 26.Be5 Bf5+=) 22...0–0 (22...Bf7 23.e6 Be6 24.Nc7 Qc7 25.Ne6+=) 23.h4 (23.Qd3 Bf7+=) 23...Qd5 (23...Bf7 24.Qd3 Rfd8 25.Rg1+=) 24.Nc7 (24.Qd5 Nd5 25.Ne6 Rfc8–/+) 24...Qf3 25.Nf3 Rac8 26.Ne6 Rfe8 (26...Bh5 27.Nc5 Rc5 28.Nd4–/+) 27.h5= Bf7 28.Nc5 (28.Ng7!? Kg7 29.e6 Kf8 30.ef7 Kf7 31.Ne5 Ke6 32.Nd3=) 28...Rc5–/+ 29.Bd4 Rc7 (29...Rc4 30.Kf2 Nd5 31.Kg3–/+) 30.h6 (30.Kf2 Nd5 31.Kg3 Rec8+=) 30...g6 (30...Ba2 31.Rd1–/+) 31.Kf2+= Bb3 32.Rbg1 (32.Be3 Nd5+=) 32...Rc4 (32...b5 33.Rc1 Rc2 34.Be3–/+) 33.Rc1 (33.Be3 Nd5 34.Nd4 A) worse is 34...Ne3 35.Ke3 Kh8 36.Rb1+= (36.Kd3?? Rd8–+); B) 34...Kf7+=) 33...Bc2 34.Kg3 Nd5 35.Ra1 b5 36.Rhe1 (36.Rhc1 Rb8–/+) 36...Nc7 37.Ra2 (37.Be3 Ne6–+) 37...Ne6 38.Be3 g5 39.Ng5 Ng5 40.fg5 Re5 41.Raa1 Rce4 (41...b4 42.ab4 Rb4 43.Kf3–+) 42.Kf3 Kf7 43.Bf2 (43.g6 Kg6 (worse is 43...hg6 44.h7 Kg7 45.Bd4 Rd4 46.Re5–/+) 44.Rg1 Kf7 45.Rg7 Ke6 46.Rh7 Re3 47.de3 d2–+) 43...Kg6 44.Re4 fe4 (44...Re4 45.Be3–+) 45.Ke3 Rf5 46.Bh4 ½–½. Mus,Roman – Wisniewski,Jan, corr 2AMM Poland, 1994.

4.Bg2 Qc7

5.Nf3 Nd7 A) 6.a3 e5 (6...Ngf6 7.0–0 e5 8.d4 Bd6 9.de5 Ne5) 7.h3 Bf3 8.Bf3 Ngf6 9.Nc3 Nb6; B) 6.Nc3 e5 (6...Bf3 7.Bf3 Ne5 8.Bg2 Nc4 9.Bc1 e6) 7.a3 Ngf6 8.h3 Bf3 9.Bf3 Bd6; C) 6.b5 e5 (6...Ngf6 7.h3 Bf3 8.Bf3 cb5 9.0–0 e5; 6...cb5 7.Nc3 Qc4 8.d3 Qb4 9.Rb1 e6) 7.h3 Bf3 8.Bf3 e4 9.bc6 bc6; D) 6.h3 Bf3 (6...Bh5 7.Nc3 e5 8.b5 Be7 9.bc6 bc6; 6...Bf5 7.Nh4 Be4 8.Be4 de4 9.Nc3 Ngf6) 7.Bf3 e5 8.a3 Ngf6 9.Nc3 Bd6.

5.Nf3 Bf3 6.Bf3 (6.ef3 Nd7 (6...Nf6 7.0–0 Nbd7 8.a3 e6 9.Re1 a5; 6...Qd6 7.a3 Qe6 8.Qe2 Qe2 9.Ke2 e6; 6...e6 7.0–0 Nf6 8.a3 a5 9.ba5 Qa5) 7.0–0 Ngf6 8.a3 e6 9.Nc3 Bd6) 6...e5 7.a3 Nf6 8.0–0 (8.c4 dc4 9.Qc2 a5) 8...Be7 (8...a5 9.ba5 Ra5+= (9...Bd6 10.c4=)) 9.e3 (9.c4 dc4= (9...0–0=)) 9...0–0 (9...a5 10.ba5 Ra5 11.d3+=) 10.d3 (10.Be2 Nbd7+=) 10...Nbd7 11.Nd2 Rad8 (11...a5 12.ba5 Ra5 13.c4+=) 12.c4= dc4 13.Nc4 Rfe8 14.Nd2 (14.Qc2 Bd6=) 14...Bd6 (14...a5 15.ba5 Qa5 16.Qc2=) 15.d4 (15.Qc2 a5=) 15...ed4 16.Bd4 h6 (16...Be5 17.Nb3=) 17.Nc4 (worse is 17.Ba7 b6–/+) 17...Ne5 18.Nd6 Nf3 19.Qf3 Qd6 (19...Rd6 20.Rfd1= (worse is 20.Ba7 b6–/+)) 20.Ba7 (20.Bf6 Qf6 21.Qf6 gf6+=) 20...Qc7 (20...Qe6 21.Bd4 Ne4 22.Rad1+=) 21.Bd4+/– Nd5 (21...Ne4 22.Qg4 Ng5 23.Rfd1+/–) 22.Qg4 g6 23.Rad1 Kh7 (23...Qe7 24.Rfe1+/–) 24.e4+– Ne7 25.Bf6 Rd1 26.Rd1 (26.Qd1?! Ng8 27.Bc3 Re4+=) 26...Ng8 27.Bc3 (27.Bd4 Rd8+–) 27...Rd8 (27...Re6 28.Qh4+–) 28.Rd8 Qd8 29.Qf3 Qe7 30.h4 (30.a4 Qe6+–) 30...Qe6 31.Kg2 Ne7 (31...f5 32.ef5 gf5 33.Bb2+/–) 32.Qf6+– Qf6 33.Bf6 Ng8 34.Bd4 Ne7 35.f4 f5 36.Kf3 h5 37.Bc5 fe4+/– 38.Ke4 Nf5 39.Kf3 Kg7 40.a4 Kf7 41.b5 cb5 42.ab5 Ke6 43.b6 Kd5 44.Bf2 Nd6 45.g4+/– Ke6 46.f5! gf5 47.gh5 Nb5 48.Kf4 Kf6 49.Bc5 Ke6? 50.h6 Nc3 51.h7 (51.h7 Ne2 52.Kf3+–) 1–0. hal1958 – Enravota, playchess.de, 2002.

5.h3 A) 5...Bc8 A1) 6.b5 e5 (6...Nf6 7.bc6 bc6 8.Bf6 ef6 9.Nf3 Bd6; 6...e6 7.a4 Bd7 8.Nc3 e5 9.bc6 bc6; 6...Bf5 7.Nf3 Nf6 8.Be5 Qb6 9.Nc3 Ne4) 7.bc6 bc6 8.c4 Nf6 9.cd5 cd5; A2) 6.f4 Nf6 (6...Qd6 7.a3 a5 8.b5 Bf5 9.d3 Nf6; 6...Nd7 7.e3 Ngf6 8.Nf3 e6 9.a3 a5; 6...Qb6 7.a3 a5 8.e3 ab4 9.Bd4 Qd8) 7.e3 Nbd7 8.Nf3 e6 9.a3 a5; A3) 6.e4 de4 (6...e5 7.ed5 cd5 8.Nc3 d4 9.Nd5 Qd6) 7.Be4 e5 8.Qe2 Bb4 9.f4 Nf6; A4) 6.Nf3 Nd7 (6...f6 7.c4 dc4 8.Qc1 Be6 9.Na3 Na6) 7.c4 dc4 8.Qc2 b5 9.a4 Bb7; B) 5...Bh5 6.Nf3 (6.g4 Bg6 7.Nf3 Nd7 8.Nh4 e5 9.Ng6 hg6) 6...Nd7 7.Nc3 e5 8.b5 Be7 9.a3 Rc8; C) 5...Bf5 6.Nf3 (6.g4 Bg6 7.Nf3 Nd7 8.Nh4 e5 9.Ng6 hg6) 6...Nd7 7.g4 Bg6 8.Nh4 e5 9.Ng6 hg6.

3.h4 Bf5

4.d3 Nd7 5.Qd2 e5 6.Nf3 Ngf6 (6...Bd6!?–/+) 7.Ne5= Ne5 8.Be5 Be7 9.f3 h5 10.a3 a5 11.ba5 Ra5 12.e4 (better 12.Qf4!? Qd7 13.e4+=) 12...de4–/+ 13.de4? (better 13.f4–/+) 13...Re5–+ 14.Qd8 Bd8 15.a4 (15.Nd2 Bc7–+) 15...Ba5 (better 15...Be4!? 16.Kd1 Ba5 17.Bc4–+) 16.Kf2 Bh7 (16...Bb6!? 17.Kg3 Be6 18.Nd2–+) 17.Na3 0–0 18.Nc4 Rc5 19.Rb1 Bc3 (better 19...Rb8!?–+) 20.Rb7–/+ Bd4 21.Kg3 Be4 22.fe4 Ne4 23.Kf3? (better 23.Kf4 Re8 24.Bd3–/+) 23...f5?? (better 23...Nf2 24.Rg1 Rf5 25.Kg3 Ne4 26.Kh2 Rf4–+ (26...Bg1?! 27.Kg1 Rd8 28.Bd3–+)) 24.Nb6?? (better 24.Bd3+=) 24...Rc2–+ 25.Be2 (25.Bc4 Kh7 26.Rf1 Nd2 27.Kg3 Be5 28.Kh3 Rc3 29.g3 Rg3 30.Kh2 Rg4 31.Kh3 Nc4–+) 25...Rb2 (25...Rc3 26.Kf4 Be3 27.Kf3 Bc5 28.Bd3 Rd3 29.Ke2 Rd2 30.Kf1 Rd1 31.Ke2 Nc3 32.Kf3 Rd3 33.Kf4 Ne2 34.Kg5 Rg3 35.Kh5 Nf4) 26.a5 (26.Rd1 Rb6 27.Rd7–+) 26...Rb3 27.Kf4 Nd6 (27...Be3 28.Kf3 Bc5 29.Bd3 Rd3 30.Ke2 Rd2 31.Kf1 Rd1 32.Ke2 Nc3 33.Kf3 Rd3 34.Kf4 Ne2 35.Kg5 Rg3 36.Kh5 Nf4) 28.Rd1? (better 28.Rd7 Be3 29.Ke5–/+) 28...Be3–+ (28...Nb7?! 29.Bc4 Kh8 30.Bb3 Na5 31.Nd7–/+) 29.Ke5 Nb7 30.Bc4 Kh8 (better 30...Kh7 31.Bb3 Na5–+) 31.Bb3 Na5 32.Bc2?? (better 32.Nd7 Re8 33.Be6–+) 32...Bb6 33.Bf5 (33.Kf4 g6–+) 33...Nc4 34.Ke6 (34.Ke4 Rf5! 35.Kf5 Ne3 36.Kf4 Nd1–+) 34...Rf5! 35.Rc1 (35.Kf5 Ne3 Double attack) 35...Rc5 (better 35...Rf6 36.Ke7 Ne5 37.Rd1–+) 36.Kf7 (36.Re1 Rd5 37.Re4 Ne3–+) 36...Ne5 37.Ke6 Rc1 0–1. beatmeeasy (1945) – Vegetariannism (1915), lichess.org, 2020.

4.Nf3 Nd7 5.Nd4 Nh6 6.e3 e5 7.Nf5 Nf5 8.Qg4 Nh6 9.Qg3 Qe7 (worse 9...Bb4 10.Qg7 (10.Be5?! Bf8=) 10...Qf6 11.Qf6 Nf6 12.Be5+–) 10.Ba3 b5 11.f4 Nf5 12.Qf2 Nd6 13.f5 Nc4 (13...Qf6!?–/+) 14.Bc4=+ dc4 15.g4 a5 16.ba5 b4 17.Bb2 Ra5 18.Qe2 Qc5 19.a3 Be7 (19...ba3 20.Bc1–/+) 20.ab4=+ Qb4 (better 20...Ra1 21.Ba1 Qb4=) 21.Bc3?? (better 21.Ra5 Qa5 22.Qc4+=) 21...Ra1–+ 22.Bb4 Rb1 23.Kf2 Rb4 (better 23...Rh1 24.Qc4 c5 25.Qd5 Bh4 26.Kg2–+) 24.Ra1 (24.Qf3 Rb6–+) 24...0–0 25.g5 Nc5 26.Ra7 Ne4 27.Kf3 Bc5 28.Ra5 Bb6 (better 28...c3!? 29.d4 Nd2 30.Kg2 Bd6 31.de5 Bc7–+) 29.Re5=+ Nd6 30.f6 c3 31.fg7 (31.dc3 Rc4 Double attack (31...Rh4 Discovered attack; 31...Rc4 Decoy)) 31...Re8 (better 31...Kg7 32.Qd3 Nc4 33.Qc3 Ne5 34.Qe5 Kg8=+) 32.Re8+= Ne8 33.dc3 (better 33.d4+=) 33...Rh4 (better 33...Rb5=) 34.Qa6+– Bd8 35.Qc8 (35.Qc6 Ng7 36.c4 Ne6–+) 35...Ng7?? (better 35...Bg5 36.Qe8 Kg7 37.Qc6 h5+–) 36.Qd8 (36.Qd8 Ne8 37.Qe8 Kg7 38.Qc6+–) 1–0. beatmeeasy (1910) – OlegVasenev (1970), lichess.org, 2020.

4.Nf3 f6 5.Nd4 Bd7 6.e3 (6.a3!?=+) 6...e5–/+ 7.Nf3 Be6 (better 7...Bb4!? 8.c4 Qb6–/+) 8.a3=+ Nd7 9.d4 e4 10.Nfd2 Bd6 11.c4 Ne7 12.c5 Bc7 13.a4 (13.Qb3 Bg4=+) 13...g6 (13...f5!?–/+) 14.h5= g5 15.a5 f5 16.Nb3 g4 17.b5 cb5 18.Bb5 Nc6 (better 18...a6 19.Be2 0–0=) 19.f3?? (better 19.a6!? Qc8 20.Nc3+=) 19...a6 (19...ef3 20.gf3 Na5 21.Na5 Ba5 22.Bc3=+) 20.Bc6=+ bc6 21.fe4 (better 21.f4!?=+) 21...fe4–+ 22.Nc3 Qg5 23.Kd2 0–0–0 (23...Rf8!? 24.Qe2–+) 24.Qe2–/+ Nb8 25.Na4 (25.Raf1 g3–/+) 25...Kb7 (25...g3 26.Nb6 Kb7 27.Rhf1–+) 26.Nb6 (26.Rab1 g3–/+) 26...g3 27.Raf1 Bg4 28.Qe1 Bh5 29.Rh5? (better 29.Kc1–+) 29...Qh5 30.Kc2 Rhf8 31.Nd2 Qg5 32.Rh1 h5 33.Bc1 h4 34.Rh3 (34.Rg1 Rf2–+) 34...Rf2 35.Kb3 Rg2 36.Qh1 (36.Rh1 Qg4 37.Kc2 Re2–+) 36...Re2 (better 36...Qe3 37.Kc2 Rg1 38.Qg1 Qg1 39.Rh4 Qd4 40.Bb2 Qd3 41.Kc1–+) 37.Nf1 (37.Qd1–+) 37...g2 38.Qg1 Rf8 (38...Rf8 39.Nh2 Re1 40.Qe1 g1Q–+) 0–1. beatmeeasy (2000) – loncho58 (1950), lichess.org, 2020.

4.Nf3 h5 5.Nd4 Bg6 6.e3 Nd7 7.Be2 e5 8.Nf3 f6 9.a3 Bd6 10.b5 Ne7 11.bc6 bc6 12.d4 e4 13.Nfd2 Rb8 14.Bc1 f5 15.c4 Ng8 16.c5 Be7 17.g3 Ngf6 18.a4 0–0 19.a5 Qc7 20.Ra2 Bf7 21.Bb2 g6 22.Bc3 (22.0–0 Ng4 23.Kg2 Bf6=) 22...Ng4 (22...Nc5 23.Qc2 Ncd7 24.0–0–/+) 23.a6? (23.Qc2 Be6=+) 23...Bf6 (better 23...Ne3 24.Qc1 Ng4–/+) 24.Ba5= Qc8 25.Nc3 Bd8 (25...Nh6 26.Nb3+=) 26.Bd8+= Qd8 27.Bg4 fg4 28.Ne2 Qe7 29.Nf4 Kg7 30.Nb3 Rfc8 31.Na5 Rb4 32.Nb7 Rb8 33.Ra1 R8b7 (better 33...Qf6!?=) 34.ab7+– Rb7 35.Qa4 Nb8 36.0–0 g5? (36...a6 37.Rfb1+–) 37.Ng2 (better 37.hg5!? a6 38.Rfb1+–) 37...gh4+– 38.Nh4 Bg6 39.Rfb1 Bh7?? (better 39...a6+–) 40.Rb7 Qb7 41.Qa7 Qa7 1–0. beatmeeasy (1960) – Wood_shaker (2110), lichess.org, 2020.

4.Nf3 h6 5.Nd4 Bh7 6.e3 e5 7.Nf3 Nd7 (7...e4 8.Ne5 Nf6=+ (8...Bb4? 9.Nc6 bc6 10.Bg7+–)) 8.Ne5+= Ne5 9.Be5 Nf6 10.a3 Be7 11.g3 0–0 12.d4 Bd6 (12...Nd7 13.Bf4+=) 13.Bf6 Qf6 14.Bd3 Be4 (14...Bd3 15.Qd3 b5 16.g4=) 15.Be4+= de4 16.Qg4 Rfe8 17.Nd2 Qe7 18.c3 a6 19.Qh3 Rad8 20.g4 Qf6 (20...b5 21.c4+=) 21.Ke2 (21.g5!? Qg6 22.gh6 Qh6 23.h5+–) 21...Qg6+= 22.Rag1 Re6 23.g5 (23.h5!? Qg5 24.Qh4+–) 23...h5+= 24.c4 Bc7 25.Nb3 (25.c5 Rd7+=) 25...b6= 26.Rd1 White plans c5 26...Red6 27.a4 f6? (better 27...Rb8!?+=) 28.c5+– bc5 29.bc5 Rd5 (29...R6d7 30.Qe6 Qf7 31.Qf7 Kf7 32.gf6 gf6 33.Nd2+–) 30.Qe6+– Kh7 (30...Qf7 31.Qc6 fg5 32.Nd2+–) 31.Qc6 Bb8 (31...Qf5 32.Qc7 Qf3 33.Kd2 Qf2 34.Kc1 Qe3 35.Kb2 fg5 36.hg5 Qg5 37.Rhg1+–) 32.gf6 Qg4 33.Kd2 Qf3 34.Rdg1?? (better 34.Rhf1 gf6 35.Qa6+–) 34...Qf2+= 35.Kc3 (35.Kd1 A) 35...Qe3 36.Kc2 Rd4 37.Rg7 (worse 37.Nd4 Qd3 38.Kc1 Bf4 39.Kb2 Qd4 40.Kb3 Qe3 41.Ka2 Rd2 42.Kb1 Qb3 43.Ka1 Be5) 37...Kh8 38.Rg2 Rc4 39.Kb2 Be5 40.Ka3–+; B) 35...Bf4 36.Qd5 Rd5 37.ef4 gf6–+) 35...Qe3= (35...gf6?? 36.Qb7 R8d7 37.Qb8 Qe3 38.Kc2+–) 36.Kb2 g6? (36...Qf2 37.Ka3 Qf6 38.Qf6 gf6 39.Rg2+=) 37.f7?? (better 37.Qe6 R5d7 38.Re1 (38.Qa6?! Bg3+=) 38...Qf2 39.Ka3+–) 37...Rd4?? (better 37...Qf2 38.Ka3 Qf7=) 38.Qg6 Kh8 39.Qg7 1–0. beatmeeasy (1915) – ahmetersan3838 (1895), lichess.org, 2021.

4.Nf3 e6

5.Nd4 Bg6 6.h5 Bf5 7.a4 a6 (7...Nh6 8.Nf5 Nf5 9.e3=) 8.e3 (8.Nf5 ef5 9.h6 Nf6+=) 8...Nf6 9.Nf5 ef5 10.Bd3 Ne4 (10...Bb4 11.Bf5 0–0 12.Qf3=) 11.f3 (11.Qf3 Qd7+–) 11...Nd6 12.h6 Rg8 (12...gh6 13.Bh8 Pinning (13.Bh8 Deflection)) 13.hg7 Bg7 14.c3 h6 15.f4 Nd7 16.Qf3 Qf6 17.b5 (17.Na3 Ne4=) 17...ab5 (better 17...Nc5 18.Be2 Nc4 19.Bc4 dc4=+) 18.a5?? (18.ab5 Ra1 19.Ba1 Nb5 20.Bb5 cb5 21.Na3–/+) 18...Nc4–/+ 19.Bc4 bc4 20.Ra2 Nc5 21.Ba3 (21.Kd1 Qd8–+) 21...Ra5 22.g4? (22.Kd1–+) 22...fg4 23.Qg4 Qe6 24.f5 Qe4 25.Qe4 Ne4 26.Rb2 b5 27.Rg1 f6 28.Ke2 Kf7 29.d3 (29.Rg6 h5–+) 29...cd3 (29...Nc3!? 30.Nc3 Ra3 31.Nb5 cb5 32.Rb5–+) 30.Kd3 Bf8 31.Rg8 Kg8 (31...Ba3?! 32.Rbg2 Bf8 33.Nd2–+; 31...Ra3? 32.Rf8 Kf8 33.Na3+–) 32.Bf8 Kf8 33.Rh2 (33.Nd2 Ng3 34.Nb3–+) 33...Ra1 34.Nd2 Nd2 (34...Rd1 35.Kc2 Rd2 36.Rd2 Nd2 37.Kd3–+) 35.Rd2 Kg7 (35...Ra3!? 36.Kd4 Ra4 37.Kc5 Rc4 38.Kd6 Rc3 39.Rh2–+) 36.Rg2 Kf7 37.Rg6 (37.Rh2 Rf1–+) 37...h5 (37...Rd1!? 38.Kc2 Rh1 39.Kd3–+) 38.Rh6 h4! 39.Rh4 Rb1 (better 39...Ke7 40.Rh8 Rf1–+) 40.Rh7= Kg8 41.Rc7 b4 42.cb4 Rb4 (42...Rb3!? 43.Ke2 Rb2 44.Kf3 Rb4 45.Rc6 Kf7+=) 43.Rc6+– Re4 44.Rf6 Kg7 45.Rd6 Re5 46.Rg6 Kf7 47.Rg5 (better 47.Kd4!? Rf5 48.Rd6+–) 47...Kf6= 48.Rh5 Kf7 (better 48...Rf5 49.Rh8 Ke5=) 49.Kd4+– Re4 (49...Re4 50.Kd5 Re3+–). beatmeeasy (1910) – medieval (1910), lichess.org, 2020.

5.Nd4 Bg6 (better 5...Bg4!?=+) 6.h5+= Bf5 7.e3 h6 8.Nf5 ef5 9.Qf3 Qg5 10.Bd3 Ne7 11.Rh3 Nc8 (11...Rg8!?+=) 12.Rg3+– Qe7 13.Qf5 Rg8?? (better 13...Nd6 14.Qf4 Rg8+–) 14.Qc8+– (14.Qc8 Qd8 15.Qb7+–) 1–0. beatmeeasy (1970) – Kiseev (2080), lichess.org, 2021.

5.Nd4 Bg6 6.h5 Bf5 7.f3 h6 8.Nf5 ef5 9.c3 (9.e3 Nf6 10.a3 Bd6=) 9...Nf6 10.Qc2 Qd7 (10...f4 11.Qf5 Bd6 12.c4 dc4 13.Bf6 gf6 14.Nc3=+) 11.g3 (11.e3 f4=) 11...Be7 12.Bh3 g6 (12...Qd6!?=+) 13.hg6+= fg6 14.a3 (14.g4 Na6+=) 14...Na6 (14...h5 15.c4=) 15.a4 (15.g4 Bd6+=) 15...Nc7 (15...d4 16.b5 cb5 17.ab5 Qb5 18.Na3 Ba3 19.Ra3–/+) 16.Na3 White intends b5 (16.g4!?=) 16...0–0–0=+ 17.b5 c5 Black prepares the advance d4 18.a5 Ne6 Black prepares d4 19.Bg2 Kb8 20.d3 (20.c4 d4=+) 20...Rc8 21.c4 d4 22.b6 a6 23.Bc1 g5 24.f4 (24.Bh3!? Nh5 25.g4–/+) 24...gf4–+ 25.Bf4 Nf4 26.gf4 Ng4 27.Bf3 Ne3 28.Qb3 Qd8 (28...Qd6 29.Nc2 Qf4 30.Ne3 Qe3 31.Qa4–+) 29.Nb5 (29.Nc2 Bh4 30.Kd2 Bg3–+) 29...ab5 (better 29...Qg8–+) 30.cb5?? (better 30.a6 Qb6 31.ab7–/+) 30...Bh4 31.Rh4 (31.Kd2 c4 32.Qa4 cd3 33.Rac1–+) 31...Qh4 32.Kd2 c4 33.dc4 Nc4 34.Kd1 Qf4 35.Qd3 Ne3 (35...Ne3 36.Kd2 Nd5 37.e3 de3 38.Kd1 Qf3 39.Qe2 Nc3 40.Kc2 Qe2 41.Kb3 Qb5 42.Ka3 Rc4 43.a6 Qb4; 35...Nb2 36.Ke1 Nd3 37.ed3 Qf3 38.Kd2 Rhe8 39.Re1 Qf2 40.Re2 Qe2) 0–1. beatmeeasy (1930) – Tu_verdugo1 (1905), lichess.org, 2020.

4.Nf3 Nf6

5.Nd4 Bg6 6.e3 e5 7.Nb3 Nbd7 8.g4 h6 9.a3 Bd6 10.Bg2 e4 11.Nd4 Be5 12.c3 (12.0–0 0–0=+) 12...a5 13.ba5 Qa5 14.Nf5 (14.h5 Bh7–/+) 14...0–0 (14...Nc5 15.Bf1 Qb6 16.Ra2 Ng4 17.Nd4–+) 15.Bh3 (15.Ne7 Kh8 16.Ng6 fg6–/+) 15...Rfe8 (15...Qb5 16.Ne7 Kh8 17.Bc1–+) 16.Rg1 White prepares the advance g5 (16.Ng7!? Kg7 17.g5–/+) 16...Nc5 17.Bf1 b5 (17...Qb6 18.Ra2–+) 18.h5 (18.Nd4 Qc7 19.h5 Bh7–/+) 18...Bh7 (better 18...Bf5 19.gf5 Na4–+) 19.Nh6? (better 19.Nd4 Ra6 20.g5 hg5 21.Rg5–/+) 19...gh6–+ 20.g5 hg5 21.Rg5 Kh8 22.h6 Na4 23.Re5 (23.Qc1–+) 23...Re5 (23...Nb2?! 24.Re8 Re8 25.Qb3 Nd3 26.Bd3 ed3 27.Qb4–+) 24.Qb3 (24.Qc2 Qc7–+) 24...Nb2 (24...Qd8!? 25.Ra2–+) 25.Qb2 Qd8 (better 25...Qc7!? 26.a4 ba4 27.c4–+) 26.c4 Rh5 27.cb5 Rh1 (27...cb5 28.Nc3–+) 28.a4 (28.bc6 Rc8–+) 28...c5 Black plans d4 29.a5 White prepares b6 29...d4 (better 29...Bf5 30.d4 cd4 31.b6–+) 30.b6 (30.Qb3 Qg8 31.Qc4 Qg2–+) 30...Qd5 (30...Ng4 31.b7 Rb8 32.ed4–+) 31.b7 (31.Qb5 d3 32.b7–+) 31...Rb8 32.a6 (32.Nc3 Qf5 33.ed4 Rf1 34.Kf1 Qh3 35.Ke2 Qf3 36.Ke1–+) 32...Qc4 (32...Qh5 33.f3 Qh4 34.Kd1 d3 35.Qf6 Qf6 36.Ke1 Qh4 37.Kd1 Rf1) 33.d3–/+ Qd3 34.Qe2 (34.Qe2 Qb3 35.a7 Qb7 36.ab8R Qb8 37.Nd2–+). beatmeeasy (1905) – markius (1885), lichess.org, 2020.

5.Nd4 Bg4 6.f3 (6.a3=+) 6...Bh5 (better 6...Qc7!? 7.d3 Qg3 8.Kd2 e5 9.fg4 ed4 10.Bd4 Ng4=+) 7.g4= Ng4 (7...Qc7 8.Rh3 Ng4 9.fg4 Bg4=+) 8.fg4+= Bg4 9.Bh3 Qd7 10.Bg4 Qg4 11.e3 Qg3 12.Kf1 e5 13.Nf5 (13.Qf3!? Qg6 14.h5+=) 13...Qg6= 14.Qf3 White prepares h5 14...Bb4? (better 14...Qf6=) 15.Be5 Nd7 (15...Kd8 16.Qf4 Nd7 17.Bc7 (17.Qb4?! Qf5 18.Bf4 b6+–) 17...Ke8 18.Rg1+– (18.Qb4?! Qf5 19.Ke1 b6+–)) 16.Bb2 (16.Bg7!? Rg8 17.Rg1 Qe6+–) 16...0–0–0 17.h5 Qe6 18.Ng7 (18.Bg7?! Rhg8 19.Rg1 Bf8+–) 18...Qd6 (18...Qe4 19.Qe4 de4 20.Rh4+–) 19.Nf5 (19.Qf7?? Rhf8 20.Qf5 Qg3–+) 19...Qc5 20.Bh8 Qc2 (20...Rh8 21.c3 Qc4 22.Kf2 Bf8+–) 21.Bc3 Bc3 22.Nc3 Qd2 23.Ne7 (better 23.Qf4 Qd3 24.Ne2 Rf8 25.Nd6 Kc7+–) 23...Kb8 24.Ne2 Ne5 25.Qf4 (25.Qf4 f6 26.Rg1+–) 1–0. beatmeeasy (1985) – vik08101975 (2000), lichess.org, 2021.

5.Nd4 Bg6 6.e3 h6 (6...e5 7.Nb3 Nbd7 8.h5=+) 7.h5= Bh7 8.a3 Nbd7 9.Nc3 e5 10.Nf3 Bd6 11.b5 Qe7 12.bc6 bc6 13.Qe2 (13.Be2!?–/+) 13...Rb8–+ 14.Bc1 0–0 15.Qa6 (15.d4 Rb7–+) 15...Nb6 (15...Bc2 16.Qa7 d4 17.Nd1–+) 16.a4 Bc2 17.a5 Nc8 (17...Na8 18.Qc6 Be4 19.Ba6–/+) 18.Qc6–/+ Bb3 19.g4 (19.d4!?–/+) 19...d4–+ 20.g5 hg5 21.Ne4 Ne4 22.Qe4 Bb4?? (better 22...f5 23.Qc6 g4 24.Bc4 Bc4 25.Qc4 Rf7–+) 23.Qe5 (worse 23.Ne5 f6 24.Rb1 Nd6–/+ (24...Ba5? 25.Rb3 Nb6 26.Rb6 Qe5 27.Qe5 fe5 28.Bc4 Kh8 29.Rb8 Rb8 30.Ke2+–)) 23...de3 24.fe3 (24.Qe3 Qf6 25.Rb1 Bd5–+) 24...Qe5 25.Ne5 Re8 26.Bb2 (26.Nc6 Bd5 27.Nb8 Bh1=) 26...f6 (26...Bd5 27.Rg1 Bd2 28.Kd2 Rb2 29.Kc3 Rb3 (29...Re5?! 30.Kb2 Be6 31.Rd1=) 30.Kd4 Rd8–/+) 27.Nc6+= Re3 28.Kf2 Bc5?? (better 28...Rf3! 29.Kf3 Bd5 30.Kf2 Bc6 31.Bc4 Kh8+=) 29.de3+– (29.Nb8?! Rh3 30.Kg2 g4 31.Rh3 gh3 32.Kh3 Be6 33.Kg3 Bd6 34.Kf2 Bb8+–) 29…Rb7 1–0. beatmeeasy (1930) – loretocmendoza (1970), lichess.org, 2021.

3.h4 Nf6

4.Nf3 Nbd7 5.h5 h6 6.e3 Qc7 7.Be2 e5 8.d4 (8.a3!?–/+) 8...e4 9.Nfd2 Bd6 (9...Bb4!? 10.c4 0–0–/+) 10.c3 a6 11.a4 b5 (better 11...0–0!?=+) 12.ab5+= cb5 13.Bb5 Bb7 14.Be2 0–0 15.g4 Nb6 16.Rg1 (16.g5 hg5 17.Rg1 Nh7+=) 16...Nh7= 17.Qb3 Kh8 18.c4 (18.Ra5!?=) 18...dc4=+ 19.Bc4 Nc4 20.Qc4 Qd7 21.d5 Rac8 (21...Rfe8 22.Nc3 Rac8 23.Qb3=) 22.Qd4+= f6 23.Ne4 (23.Qe4 Be5 24.Be5 Rc1 25.Ke2 Rg1–+) 23...Be5 24.Qd2 Bb2 25.Qb2 Qd5 26.Nc5 Bc6 (26...Ng5 27.Nd2+=) 27.Ra6 Bb5? (27...Ng5 28.Nd2 Rfd8=+) 28.Rb6?? (28.e4 Rfe8 29.Nc3=) 28...Rcd8?? (better 28...Ng5 29.Rb5 Nf3 30.Kf1 Qd1 31.Kg2 Ng1–+) 29.Nc3+– Qf3 30.Rb5 Rfe8 31.Ne2 (better 31.Nb7 Rd4 32.Ne2 Rg4 33.Rg4 Qg4 34.Qd4+–) 31...Ng5 32.Rg3?? (better 32.Na6+–) 32...Qd5?? (better 32...Qh1 33.Ng1 Nf3 34.Ke2 Ng1 35.Rg1 Qg1–+) 33.Nc3+– Qh1 34.Ke2 Ne4 (34...Ne6 35.Ne6 Re6 36.Qb1+–) 35.N5e4 Re4 36.Qc2 (better 36.Qb1!? Qb1 37.Nb1 Re7+–) 36...Re6 37.Rc5 Red6 38.Rd5! Rd5 39.Nd5 Qd5 40.f4 Qb5 41.Kf2 (41.Kf3 Qb4 42.Rg1 Qd6+=) 41...Qb4= 42.e4?? (better 42.Kf3=) 42...Rd2–+ 43.Qd2 Qd2 44.Kf3 Qd3 45.Kf2 Qe4 46.Re3 (46.f5–+) 46...Qf4 47.Ke2 Qg4 (47...Qg4 48.Kf2 Qh5–+) 0–1. beatmeeasy (1920) – Yaya02 (1935), lichess.org, 2020.

4.Nf3 Bg4 5.Ne5 Bc8 6.a3 Nbd7 7.Nd3 Qc7 8.e3 e5 9.g4 h6 10.Bg2? (10.Bh3 e4 11.g5 Ng8–/+) 10...Bd6 (10...e4!? 11.Nf4 Ne5–+) 11.Nc3 (11.g5 Ne4=+) 11...Nb6 (better 11...e4 12.g5 ed3 13.gf6 dc2 14.Qc2 Nf6–/+) 12.Nc5? (better 12.g5 Nfd7 13.Qg4=+) 12...Bg4–+ 13.f3 Bh5 14.d3 Qc8 (better 14...Bc5!? 15.bc5 Nbd7 16.Qd2–+) 15.Bh3–/+ Qc7 16.Qe2?? (16.Bg2 Bc5 17.bc5–+) 16...Bc5–+ 17.bc5 Nbd7 18.Rg1 g6 19.Bg4 (better 19.0–0–0!?–/+) 19...0–0–0–+ 20.a4 (20.Bh3 Kb8–+) 20...Bg4 21.fg4 Nc5 22.a5?! (22.Rf1 Qe7–+) 22...a6 Black intends d4 (22...d4!? 23.Ne4 Nfe4 24.de4–+) 23.Bc1 (23.Rf1 Qe7–+) 23...d4 24.Na4 (24.Qf2 Rd6 25.Ne2 Re6–+) 24...Qa5 25.Bd2 (25.Qd2 Qb5 26.Nc5 Qc5–+) 25...Qb5 26.Nc5 Qc5 27.g5 (27.e4 h5 28.gh5 Nh5–+) 27...hg5 28.hg5 Nd5 29.Qg4 (29.e4 Ne3 30.Ra5 Qb6 31.Be3 Qa5 32.Bd2 Qa2 33.Qg4 Kb8–+) 29...Kb8 30.e4 (30.ed4 Qc2 31.Qe2 Qb2–+) 30...Nb4 (better 30...Ne3 31.Qg3 Nc2 32.Ke2 Na1 33.Ra1–+) 31.Bb4 Qb4 32.Kd1 (32.Kf1 Qc3 33.Qd1 Rh2–+) 32...Qc3 (better 32...Rh2 33.Rg2 Rh1 34.Rg1 Rdh8–+) 33.Rb1 (33.Ra2–+) 33…Rh2 (33...Rh2 34.Rg2 Rdh8–+) 0–1. beatmeeasy (1980) – Blanko1 (2050), lichess.org, 2021.

4.Nf3 e6

5.c3 a5 6.ba5 Ra5 7.h5 h6 8.a4 Be7 9.Nd4 0–0 10.Nb3 Ra8 11.a5 Ne4 (11...c5!? 12.d3–+) 12.d3 Nc5 13.Nc5 Bc5 14.d4 Bd6 15.Qa4 Bd7 16.Qa2 Qf6 (16...c5 17.dc5 Bc5 18.Nd2–+) 17.Nd2 Na6 18.e3 Nc7 19.Qb3 Bc8 20.c4 dc4 21.Nc4 (worse 21.Bc4 Qg5=+) 21...Be7? (better 21...Rd8+=) 22.d5!+– ed5 (22...cd5 23.Bf6 Discovered attack; 22...Nd5 23.Bf6 Discovered attack; 22...ed5 23.Bf6 Discovered attack) 23.Bf6 Bf6 (23...dc4 24.Bc4 (24.Be7?! cb3 25.Bf8 Kf8+=) 24...Bf6 25.Ra2+–) 24.Nb6 (better 24.Nb2+–) 24...Ba1 25.Na8 Na8 26.Qa2 (26.Bd3 Be5+–) 26...Bc3 27.Kd1 d4 28.a6 ba6 29.Ba6 Be6 30.Bc4 Bc4? (better 30...Nc7 31.Be6 Ne6+–) 31.Qc4 Rd8 (31...Rb8 32.Qc6 Rb1 33.Kc2 Rh1 34.Qa8 Kh7 35.ed4+–) 32.Kc2 (better 32.Qc6!? de3 33.Ke2 Bf6+–) 32...Nb6 33.Qc6 Nd5 34.Kb3 Rb8? (34...de3 35.fe3 Bf6+–) 35.Kc4 Rb4 (35...Rd8 36.Rd1 Kh7+–) 36.Kd5 Rb2 (36...Bb2 37.Rb1 d3 38.Qc8 Kh7 39.Qf5 Kg8 40.Qd3+–) 37.ed4 Bd2 (37...Bd4 38.Qc8 Kh7 39.Qf5 Kg8 40.Kd4 Rb4 41.Kc3+–) 38.Rd1 (38.Qe8!? Kh7 39.Ra1 Bf4+–) 38...Bg5 (38...Ra2 39.Qe8 Kh7 40.Qf7+–) 39.Qe8 Kh7 40.Qf7 (better 40.Ra1!? Bf4 41.Qf7 Rb8+–) 40...Rb5 41.Kc6 Rb2 42.Re1 (42.Qg6 Kh8 43.Qe8 Kh7 44.Re1 Be3 45.Re3 Rc2 46.Kd7 Rf2 47.Qg6 Kg8 48.Re8 Rf8 49.Rf8 Kf8 50.Qe8) 42...Bf6 43.Qg6 Kg8 44.Re8 1–0. beatmeeasy (1985) – DimonEnergy (1920), lichess.org, 2021.

5.c3 Bd6 6.h5 h6 7.d4 Nbd7 8.Nbd2 Nb6 9.a4 a6 10.a5 Nc4 (better 10...Nbd7!?=) 11.Nc4+– dc4 12.e3 b5 (12...Qe7!?+–) 13.ab6! Qb6 14.Bc4 (14.Nd2 Qc7+–) 14...0–0 15.Kf1 (15.Qc2 Re8+–) 15...Bb7 (15...a5 16.Ne5+=) 16.Ne5 (16.Qb3!?+–) 16...Be5 17.de5 Nd5? (17...Rfd8 18.Qe1 (worse 18.ef6 Rd1 19.Rd1 gf6–/+) 18...Ne4 19.Kg1=) 18.Bd5 (better 18.e4!? Nc7 19.Bc1+–) 18...cd5+= 19.Rh3 (19.Ra5 Rfc8+=) 19...Qc6 (19...Qc7!?=) 20.Rg3 Qc4 21.Kg1 Rfd8 22.Qf3 Qe4 23.Qe2 (23.Qe4!? de4 24.c4+–) 23...Bc6 (worse 23...Qe5 24.c4 Qf5 25.Bg7+–) 24.f3 (24.Rg4 Qf5 25.c4 dc4 26.e4+= (worse 26.Rc4 Bb5 27.Rac1 Bc4 28.Rc4 Qb1 29.Rc1 Qe4–/+)) 24...Qc4 (24...Qe5 25.f4 Qf5 26.c4=) 25.Qd2 (25.Qc4 dc4 26.Rg4 Rd2+–) 25...Bb5 26.Re1 (26.Rg4!? Qc7 27.Qf2+–) 26...a5 27.Rg4 Qa2?? (27...Qc7 28.e4 Kf8 29.ed5 Rd5 30.Qe3 ab4 31.cb4+–) 28.e4 (28.Ra1!? Qa1 29.Ba1 ab4+–) 28...ab4?? (better 28...Kh7 29.Ra1 de4+–) 29.Qh6+– (29.cb4?! Kh8 30.ed5 Rd5+=) 29...g6 (29...Kf8 30.Qg7 Ke8+–) 30.hg6 f5 31.Qh7 Kf8 32.Qf7 1–0. beatmeeasy (1925) – Bushalla (1985), lichess.org, 2021.

5.c3 g6 (5...Bd6 6.e3–/+) 6.Rg1 Bg7 7.d3 0–0 8.Nbd2 Nbd7 9.g4 Re8 (9...e5 10.e4=+) 10.g5 (10.h5 a5=) 10...Nh5=+ 11.e3 e5 12.Be2 e4 13.de4 de4 14.Nh2 Ne5 (14...a5!? 15.a3 Nb6=+) 15.Ne4+= Qd1? (better 15...Bf5 16.Qd8 Rad8=) 16.Rd1+– Nc4 (16...Be6 17.Nd6 Red8 18.f4+–) 17.Bc4 Re4 18.Rd8 Bf8 19.Bd3 (19.Bb3 Nf4+–) 19...Rh4 (19...Re7 20.Rg4!+–) 20.Nf3 (20.Ng4! b5+–) 20...Rh3 21.Ne5 Ng7 22.Nd7 (better 22.Bc4!? Nf5 23.Bf7 Kg7+–) 22...Ne6 23.Nf6?? (better 23.Re8 Rh4 24.Bc2+–) 23...Kg7= 24.Re8 h6? (24...Ng5 25.Be2 Nf3 26.Bf3 Rf3+–) 25.c4 hg5 26.Nd5 (26.c5 Rh4 27.a3 a5 28.Nd7 Kg8+–) 26...Kh7?? (26...f6 27.Nf6 Bb4 28.Kd1+=) 27.Nc7?? (better 27.Ne7+–) 27...Bg7?? (27...Nc7 28.Rf8 Be6 29.Ra8 Na8 30.Rg5=) 28.Bg7 (better 28.Na8 Bb2 29.Rc8 Bc3 30.Ke2 Bb4 31.Rb1+–) 28...Ng7?? (better 28...Nc7 29.Re7 Kg7 30.Rc7 Kf6=+) 29.Re7+– (29.Na8?! Ne8 30.Rg5 Rh1 31.Kd2 Rh2=) 29...Rb8 30.Rf7 Bf5?? (better 30...Kg8 31.Bg6 g4+–) 31.Bf5 gf5 32.Rg5 Rg8 33.Ne6 Kh6 34.Rfg7 (34.Ng7?! Rh1 35.Ke2 Kg5 36.Ne6 Kg6 37.Rb7 Rb1+–) 34...Rg7 35.Rg7 Rh1 36.Ke2 Ra1 37.Rb7 Ra2 38.Kf3 Rb2 (38...a5 39.ba5 Ra5 40.Rb6+–) 39.Nd4 White prepares the advance b5 (better 39.Nd8 Rc2+–) 39...Kg6 (39...c5 40.Nf5 Kg5 41.Nd6 Rb4 42.Ra7+–) 40.Nc6 a5 41.Na5 Kg5 42.b5 Ra2 (42...f4 43.ef4 Kf5 44.c5+–) 43.Nc6 (43.b6!? Rb2+–) 43...Ra4 (43...Kf6 44.Rb8+–) 44.c5 (44.Rg7 Kf6 45.b6 Kg7+–) 44...Rh4 (44...Rc4 45.Nd4 f4 46.c6 fe3 47.fe3+–) 45.b6 Rh3 46.Ke2 (better 46.Kg2 Rh8 47.Rc7 f4+–) 46...f4 47.ef4 Kf4 48.Rf7 Ke4 49.b7 Rb3 50.b8Q Rb8 51.Nb8 Kd5 52.c6 Kd6 (52...Ke5 53.c7 Kd6 54.c8Q Kd5 55.Rf5 Ke4 56.Qc2 Kd4 57.Nc6) 53.c7 Ke6 (53...Kd5 54.Rf5 Ke6 55.c8Q Kd6 56.Qd7) 54.Rh7 (54.Rf8 Ke5 55.Re8 Kf4 56.c8Q Kg5 57.Re5 Kf6 58.Qe6 Kg7 59.Rg5 Kf8 60.Nd7) 54...Kd5 55.c8Q Ke5 56.Qc6 Kd4 57.Rh5 (57.Rd7 Ke5 58.Rd5 Kf4 59.Qc4) ½–½. beatmeeasy (1990) – grangadir (2015), lichess.org, 2021.

4.Nf3 Bf5

5.a4 e6 6.c3 Bd6 7.Nd4 Bg6 8.e3 e5 9.h5? (9.Nb3!?–/+) 9...Bh5 (9...Bb1!? 10.Nc6 Nc6 11.Rb1–+) 10.Rh5 ed4 (10...Nh5 11.Qh5 ed4 12.c4 de3 13.Bg7 ef2 14.Kd1–+) 11.ed4? (better 11.Rh3–/+) 11...Nh5 12.Qh5 Qf6 13.b5 Nd7 14.Na3 0–0 15.0–0–0 (15.Nc2 Rfe8 16.Ne3 Re7–+) 15...Qf2 16.Bd3 g6 17.Qh3 Nf6?? (better 17...f5–+) 18.Rf1+= Qf1 (18...Qg3!? 19.Qg3 Bg3 20.Rf6 Kg7+=) 19.Bf1+– Ne4 20.Qd7 Bf4 (20...Rab8 21.Bd3 (21.bc6?! Rfd8 22.Qh3 bc6+=) 21...Rfd8 22.Qh3+–) 21.Nb1 (21.Qb7 Nd2 22.g3 Bg5+–) 21...cb5 (21...Rab8 22.Qg4 Bc7 23.d3+–) 22.ab5 (22.Qd5 Nd6 23.Qf3 Bh2+–) 22...Rfd8 23.Qb7 Rac8 24.Qa7 Rc7 (24...Ra8 25.Qe7 Rab8 26.Qh4+–) 25.Qb6 Rdc8 26.Kc2 h5 (26...Kg7+–) 27.Bd3 Nf2 (27...Re7 28.Be4 Re4 29.Qb7+–) 28.Qf6 (better 28.Bg6 Kg7 29.Bh5 Re8+–) 28...Bg3 (28...Nd3 29.Kd3 Bh2+–) 29.Bg6! fg6 30.Qg6 Rg7 (30...Kh8 31.Qg3 Ng4 32.Qf4+–) 31.Qe6 Kh8 (31...Kh7 32.Qc8 Rg5 33.Bc1+–) 32.Qc8 (32.Qc8 Rg8 33.Qe6+–) 1–0. beatmeeasy (1915) – tractatus1 (1965), lichess.org, 2020.

5.Nd4 Bd7 6.h5 e5 7.Nf3 (7.Nb3=+) 7...Bd6 (better 7...e4!? 8.Ne5 Bb4–/+) 8.h6 e4 9.hg7 Rg8 10.Ng5 (better 10.Rh6!? Be7 11.Ne5=) 10...Rg7–/+ 11.Nh3 (11.Rh6 Rg6 (11...Rg5 12.Bf6 Be7 13.Bg5 Bg5 14.Rh1+–) 12.Rg6 hg6–/+) 11...Qe7 (11...Bb4!? 12.Nf4 Bg4–/+) 12.a3=+ e3 (better 12...a5!?=+) 13.de3+= (13.fe3?? Bg3 14.Nf2 Ng4–+) 13...Rg6 (13...Bf5!?+=) 14.Nf4+– Bf4 15.ef4 Ne4 (better 15...Bf5!?+–) 16.Rh7+– Rg8 17.Nd2 Bf5 18.Rh5 Bg6?? (better 18...Nd6+–) 19.Re5 Nd7 20.Re7 Ke7 21.Ne4 Be4 22.f3 Bg6 23.g4 Rae8 (23...f6 24.e4! de4 25.Qd4+–) 24.Kf2 (better 24.f5 Bh7 25.Qd2 Kd8+–) 24...f5 25.g5 Nb6 26.Bf6 Kd7 27.e3 Kc7 28.a4 White intends b5 28...Nd7 29.b5 Re6 30.Bb2 Re7 31.bc6 bc6 32.Qd4 Kb7 (32...Ra8+–) 33.Qb4 Ka8 34.Qe7 Nc5 35.Qc5 Rb8 36.Qc6 Rb7 37.Qb7! Kb7 38.Be5 a5 39.Rb1 Kc6 40.Rb5 (better 40.Bb5 Kc5+–) 40...Kd7 41.Ra5 d4 42.ed4 Ke6 (42...Kc8 43.Bc4 Be8 44.g6 Bd7 45.Ra7 Kd8 46.g7 Ke7 47.a5 Ke8 48.g8Q Ke7 49.Qe6 Kd8 50.Qd7) 43.Ra6 (43.Ra7 Kd5 44.Rc7 Bf7 45.Bc4) 43...Kd5 (43...Kd7 44.Bb5 Ke7 45.Bf6 Kf8 46.Ra8 Be8 47.Be8 Kg8 48.Bg6) 44.Rg6 (44.c4) ½–½. beatmeeasy (1930) – nirkh (1935), lichess.org, 2021.

5.Nd4 e6 6.a3 (6.Nf5 ef5 7.a3 Bd6=) 6...h6 (6...Bg4 7.Nf3–/+) 7.e3 (7.Nf5 ef5 8.e3 Bd6=) 7...Bh7=+ 8.g3 Nbd7 9.Bg2 a5 10.b5 c5 11.Nf3 a4 12.Bf6 (12.d3!?=) 12...Qf6–/+ (worse 12...gf6 13.Nc3=) 13.Nc3 Nb6 14.0–0 Be7 15.d4 (15.Nh2 0–0–/+) 15...cd4 16.ed4 Rc8 17.Qe1 (17.Qd2 g5 18.hg5 hg5–+) 17...0–0 18.Ra2 Rc4 19.Ne5 Rc7 20.Qd2 (20.f4 Rfc8 21.Rf3 Bd6–/+) 20...Rfc8–+ 21.Ne2 Rc2 22.Rc2 Rc2 23.Qd1? (better 23.Qa5 Bd8 24.Nf4–+) 23...Ba3 24.Qa1 Bd6 (24...Re2 25.Qa3 Be4 26.Be4 Re4 27.Qd6 Rd4 28.f4=) 25.Nf4 Qd8 26.Rc1 Qc7 27.Rc2 Qc2 28.Nf3 (28.Qe1 Qb1 29.Qb1 Bb1–+) 28...Bf4 (better 28...a3 29.h5–+) 29.gf4 Qc4 (29...Qb3 30.Qc1 Nc4 31.Ne5–+) 30.Ne5 Qb5 31.Qc1 (31.Qa3 f6 32.Bf1 Qe8–+) 31...Qe8 (better 31...Qb1 32.Qb1 Bb1–+) 32.Qc7 f6 (32...a3!? 33.Qb6 Qa8 34.Nf7–+) 33.Qb6 fe5 34.fe5 Qc6 35.Qd8 Kf7 36.Qa5 Bc2 (36...Qc1 37.Kh2–+) 37.Bf3 (37.Bf1 Be4 38.Qb4 Kg8–+) 37...Kg6 (37...Be4 38.Bd1–+) 38.h5 Kh7 39.Qd8 (39.Qd2–+) 39...Bf5 40.Qa5 (40.Kg2 Qc3 41.Qe8 a3–+) 40...Qc1 41.Kg2 a3 (41...a3–+) 0–1. beatmeeasy (1950) – hoppls (1925), lichess.org, 2020.

5.Nd4 Bg6 6.Nc3 a6 (6...e5 7.Nf3 e4 8.Ne5–/+) 7.a4 (7.Nf3 Nbd7–/+) 7...Nbd7 8.b5 ab5 9.ab5 Ra1 10.Ba1 Qb6 11.bc6 bc6 (worse 11...Qd4 12.cd7 Kd7 13.e3+=) 12.Na4 Qb7 13.e3 e5 14.Nf3 Bd6 15.Ng5 (15.c4 0–0–/+) 15...h6 16.Nf3 0–0 17.Be2 (better 17.c4!?–/+) 17...Ra8–+ 18.Nb2 (18.Nc3 Bc2! 19.Qc1–+) 18...Ba3 19.h5 (19.Nc4 dc4 20.Be5–+) 19...Bb2 20.Bb2 Qb2 (20...Bh5?! 21.Ba1–+) 21.hg6 Ra1 (21...fg6?! 22.0–0–+) 22.gf7 Kf7 23.Qa1 Qa1 24.Bd1 e4 25.Nd4 c5 26.Nb3 Qa6 27.Be2 Qa2 28.Bd1 c4 29.Nc1 Qb1 30.Ne2 Ne5 31.Nc3 Qb7 32.Ne2 Neg4 33.f3 ef3 34.gf3 Ne5 35.Nd4 Qd7 36.Kf2 Nc6 37.Ne2 Qf5 38.Ng3 Ne4 (38...Qh7!? 39.f4–+) 39.Ne4 de4 40.f4 Qd5 41.Ke1 Nb4 42.Rh5 (42.Rh4 Kf6–+) 42...Qa8 (better 42...Nc2 43.Bc2 Qh5 44.Be4–+) 43.Rf5 Kg6 44.Rb5 Nc6 (better 44...Qa4 45.Bh5 Kf6 46.Rb6 Ke7 47.Bd1–+) 45.Rc5 Na5 46.Rb5 (46.Bg4 Nb7 47.Rc4 Nd6–+) 46...Qa6 (better 46...Kf6 47.Rb6 Nc6 48.Bg4–+) 47.Rb1 (47.Re5 c3! 48.Re4 cd2 49.Kd2 Nc4 50.Kc3 Nd6–+) 47...c3! 48.dc3 (48.Be2 Qf6 49.f5 Kf5 50.Rb5 Kg6–+) 48...Qa7 49.Kf2 Qc5 (49...Nc4 50.Bg4 Qe3 51.Kg2–+) 50.Rb4 (50.Be2 Qc3 51.Rb6 Kf7–+) 50...Qc3 (better 50...Nc4 51.Rc4 Qc4–+) 51.Re4 Nc6 (better 51...Qd2 52.Be2 Qc2–+) 52.Rd4 (52.Be2–+) 52...Nd4 53.ed4 Qd4 54.Ke2 Qf4 55.Kd3 h5 56.Be2 (56.c3–+) 56...h4 57.c4 h3 58.Bg4 h2 59.c5 (59.Be2 h1Q 60.Bh5 Kh5 61.Kc3 Qb1 62.c5 Qfb4) 0–1. beatmeeasy (1965) – Riswantowanto (1910), lichess.org, 2020.

5.Nd4 Bg6 6.e3 e6 (better 6...e5!? 7.Nb3 Nbd7=+) 7.h5= Nh5 (7...Be4!?=) 8.Rh5+= Bh5 9.Qh5 Bb4?? (better 9...Qe7+=) 10.Ne6+– Qa5 (10...Qd7 11.Bg7 Qe6 12.Bh8 Nd7+–) 11.Ng7 Kd8 (11...Kf8 12.Qf5 Na6 13.Ba6 ba6 14.Ne6 Ke7 15.Qf6 Kd7 16.Qf7 Be7 17.Ba3+–) 12.Qf7 Rf8 (12...Kc8 13.Ne6 Rf8 14.Nf8 Bf8 15.Bf6+–) 13.Ne6 (13.Ne6 Kc8 14.Nf8 Bf8 15.Bf6+–) 1–0. beatmeeasy (1915) – peepeehole (1900), lichess.org, 2021.

5.Rg1 h6 (5...e6 6.b5–/+) 6.Nd4 (6.e3 Nbd7=+) 6...Bh7 7.g4 e6 (7...e5 8.Nf3–/+) 8.a3 Be7 9.g5 (9.Nc3 Ne4 10.d3 Nc3 11.Bc3 Bh4–/+) 9...hg5–/+ 10.hg5 Nh5 (10...Ne4 11.e3 Bg6 12.Nf3–/+) 11.e3 Bg6 12.f4 Nd7 13.Nc3? (13.Rh1 e5 14.f5 ed4 15.fg6 Bg5 16.gf7 Kf7 17.Qf3 Qf6–/+) 13...Bd6 (13...e5!? 14.fe5 Bg5–+) 14.Qe2 Qc7 15.0–0–0 0–0–0 16.Bg2 e5 17.fe5 Be5 18.Nf3 Bg3 (18...Ng3 19.Qe1 Bd6 20.Nd4–/+) 19.Bh3 Kb8 20.b5 (20.Bg4 Bd6–/+) 20...Ne5 21.bc6 bc6 (21...Nc6?! 22.Nb5 Qe7 23.Nbd4 Nd4 24.Nd4–/+; 21...Qc6?! 22.Nd4 Qb6 23.Qb5 Qb5 24.Ncb5=+) 22.Ne5 Be5 (22...Qe5?! 23.Na2 Qg5 24.Nb4+=) 23.d4 (23.Rg4 Ng3 24.Qg2 Ka8–+) 23...Bd6 (23...Nf4 24.Qf1 A) 24...Rh3?! 25.de5 Rh2 26.Rd2 (26.ef4?? Rc2 27.Kb1 Qb6–+; 26.Qf4?? Rc2 27.Kb1 Rf2 28.Ka1 Rf4 29.ef4 d4–+) 26...Rd2 27.Kd2–/+; B) 24...Nh3–+) 24.Kd2?? (24.Bg4–+) 24...Ka8 (better 24...Nf4 25.ef4 Bf4 26.Ke1 Rde8–+) 25.Qa6 (25.Bg4 Rb8 26.Rb1 Ng3–+) 25...Rb8 26.Bg4 (26.Rb1–+) 26...Rb6 (better 26...Rb2 27.Rc1 Ng3 28.Bf3–+) 27.Qe2 (27.Qa5 Rb2 28.Qc7 Rc2 29.Ke1 Bc7–+) 27...Rb2 28.Na4 (28.Rc1 Nf4! 29.ef4 Bf4 30.Kd1–+) 28...Rc2 29.Ke1 Re2 30.Ke2 Ba3 (30...Ng3 31.Kf2 Rh2 32.Rg2 Ne4 33.Kf1 Rg2 34.Nc3 Ba3 35.Rd2 Rd2 36.Ne4 de4 37.Be2 Qh2 38.d5 Qe2 39.Kg1 Qg2) 31.Ra1 Re8 (31...Qh2 32.Kd1 Bc2 33.Ke1 Bb4 34.Nc3 Bc3 35.Kf1 Bd3 36.Be2 Qe2) 32.Ra3 Qh2 33.Kd1 (33.Rg2 Qg2 34.Ke1 Qg1 35.Kd2 Qg4 36.Nb6 Kb7 37.Ra7 Ka7 38.Nc8 Rc8 39.e4 Qe4 40.Kc3 Qc2 41.Kb4 Rb8 42.Ka3 Qb3) 33...Qg1 34.Kd2 Qg4 35.Nb6 (35.Ra1 Qg2 36.Kc3 Qc2 37.Kb4 Rb8 38.Ka5 Qc4 39.Rb1 Rb5 40.Rb5 Qb5) 35...Kb7 36.Na4 (36.Ra7 Kb6 37.Ra3 Qg2 38.Ke1 Ng3 39.Rb3 Kc7 40.Rb7 Kb7 41.Kd1 Re3 42.Kc1 Re1) 36...Qg2 37.Kc3 (37.Kd1 Qc2 38.Ke1 Ng3 39.Rb3 Kc8 40.Rb8 Kb8 41.Nc3 Re3 42.Ne2 Re2) 37...Qc2 38.Kb4 0–1. beatmeeasy (1920) – mahdirashidzadeh (1880), lichess.org, 2020.

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  • 1.b4 (4 players, 1 day/move)
  • 1.b4 (4 players, 10 days/move)
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  • 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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