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(c) Marek Trokenheim

1.b4 e5 2.Bb2 d6 3.e3

(...)

3.e3 f6 4.Nf3 c6 5.Be2 Be6 6.c4 Be7 7.d4 Nh6 8.d5 Bd7 9.dc6 bc6 10.Nbd2 Be6 11.Ne4 g5 12.0–0+= Nd7? 13.c5?? dc5=+ 14.bc5 Nc5 15.Nc5 Bc5 16.Qd8 Rd8=+ 17.Rfd1? 0–0 18.Rd8 Rd8 19.h3 Nf7 20.Rc1–/+ Rd5?? 21.Bc4 Rd2?? 22.Nd2+– Bc4 23.Nc4 Be7 24.Na5 Kg7 25.Rc6 Nd6 26.Rc7 Kf7 27.Nc6 Ke6 28.Re7 Kd5 29.Nb4 Kc5 30.Nd3 Kd5 31.Ra7 Kc6 32.Rh7 Nf5 33.Rf7 Kd6 34.Rf6 Kd5 35.Rf5 Ke4 36.Rg5 Kd3 37.Re5 Kc2 +–. var – gaia, Live Game Caissa's Web, 2004.

3.e3 h5 4.c4 Nc6 5.b5 Nb4?? (better is 5...Nce7=) 6.a3+– Nd3 (6...Nc6 7.bc6 bc6 8.Nc3+–) 7.Bd3 a5 8.Nc3 f5 9.Qc2 g5 (9...Ne7 10.Nd5 Qd7 11.Be2+–) 10.Bf5 Bf5 11.Qf5 Bg7 (11...Qf6 12.Qe4 0–0–0 13.d4 ed4 14.Nd5+–) 12.Qg6 Ke7 (12...Kf8+–) 13.Qg7 Ke6 14.Qh8 Qf8 15.Qh5 Qf6 16.Nd5 Qg7 17.Qg4 Kf7 18.Nf3 (better is 18.Nc7 Rd8 19.Ne6 Qf6 20.Nd8 Qd8+–) 18...Re8 19.Ng5 Kf8 20.Qf5 Nf6 21.Nf6 Qh6 22.Ng4 (22.Nd5 Kg8 23.Qf7 Kh8 24.Qe8 Kg7 25.Qf7 Kh8 26.Nf6 Qg6 27.Qf8 Qg8 28.Qg8) 22...Kg8 (22...Kg7 23.Qf7 Kh8 24.Nh6 Rg8 25.Qg8) 23.Nh6 (23.Qf7 Kh8 24.Nh6 Rg8 25.Qg8) 23...Kg7 24.Qh7 Kf6 25.Ne4 Ke6 26.Qf7 1–0. forsetinn – cmanblast3, gameknot.com, 2013.

3.e3 Na6

4.a3 Nh6 (4...Nb8 A) 5.Nc3 Nf6 (5...Be7 6.Nf3 Nf6 7.Be2 Bf5 8.0–0 0–0 9.d3=; 5...a5 6.Nf3 Nf6 7.b5 Nbd7 8.Bc4 Be7 9.e4=; 5...Nd7 6.Nf3 Ngf6 7.e4 Be7 8.Be2 0–0 9.0–0=) 6.Nf3 Be7 7.Be2 Nbd7 8.e4 0–0 9.0–0=; B) 5.Nf3= a5 (5...Be7 6.Be2 Nf6 7.Nc3 a5 8.0–0 0–0 9.e4=; 5...Nd7 6.Be2 Ngf6 7.d4 e4 8.Nfd2 c6 9.c4=; 5...Nf6 6.Be2 Be7 7.0–0 a5 8.b5 0–0 9.Nc3=) 6.Nc3 Nf6 7.Be2 Be7 8.e4 ab4 9.ab4=) 5.Be2 (5.d4 e4 (5...ed4 6.Qd4 Be6+= 7.Nf3 Nf5 8.Qd1 Nh4 9.Nd4+=) 6.Ba6 ba6 7.d5 Qg5 8.Kf1 Qf5 9.Nc3=) 5...Qh4 (5...Qg5!? 6.g3 Qg6= 7.Nc3 c6 8.Bd3 f5 9.Ba6=) 6.Nf3+= Qg4 (6...Qe7 7.Nc3 c6 8.e4 Nc7 9.0–0+=) 7.0–0 g5?? (better is 7...Qg6+= 8.Ba6 ba6 9.c4+=) 8.Ne5!+– de5 (8...Qe4 9.Bb5 Kd8+–) 9.Bg4 Ng4 (9...Bg4 10.f3 Bd7 11.Be5+–) 10.f3 Nf6 11.Be5 g4 (11...Bg7+–) 12.Bf6 Rg8 13.Nc3 Rg6 14.Bh4 (14.Ne4 c5+–) 14...Bf5 (14...Bg7 15.d4 c6 16.Bg3+–) 15.e4 Rh6 (15...Be6 16.b5 Nb8 17.Nd5+–) 16.Bg3 (better is 16.ef5!? Bg7+–) 16...Bd6 (16...Be6 17.b5 Nc5 18.Bc7+–) 17.Bd6 cd6 18.ef5 Kd7 19.fg4 Rg8 20.Qf3 Rg5 21.Qb7 Nc7 (21...Kd8 22.Rae1 Nc7 23.Nb5 Ne6 24.fe6 Re6 25.Qc7 Ke8 26.Re6 fe6 27.Nd6) 22.Nd5 Rgh5 (22...Rf5 23.Qc7 Ke6 24.Rf5 Rh2 25.Qf7) 23.Qc7 Ke8 24.Qe7 1–0. Trkn – CartmanUSM, itsyourturn.com, 2000.

4.Ba6+= ba6 5.c4 (5.Nf3 Rb8 6.a3 a5=) 5...Rb8 6.a3 Nf6 (6...a5 7.Qa4 Bd7 8.Qa5+=) 7.d3 (7.d4 ed4 8.Bd4 c5=) 7...Bg4 (7...a5 8.Qa4 Bd7 9.Qa5+=) 8.Ne2 (8.Qa4 Qd7 9.Qa6 c6=) 8...Be2 (8...a5 9.Qa4 c6 10.Qc6 Bd7 11.Qa6+=) 9.Qe2 (9.Qa4 Qd7 10.Qd7 Kd7 11.Ke2 a5+=) 9...e4 (9...a5!?+=) 10.0–0 ed3 11.Qd3 a5 12.Bc3 (12.Nd2 Be7+/–) 12...Qe7 (12...d5 13.b5+/–) 13.Nd2 g5 (13...Qe6!?+/–) 14.Qf5 (14.Qf5 Bg7 15.Qa5+–) 1–0. Wall,Bill – Lee,John, internet, 2003.

3.e3 c5

4.b5 a6 5.c4 (5.Nc3!?=) 5...ab5–/+ 6.cb5 Ra5 (6...Nf6 7.d4 ed4 8.ed4=+) 7.Nc3 Nf6 8.Nf3 e4 9.Ng5 d5 10.f3 (10.d3 h6 11.Nh3=+) 10...c4 (10...h6 11.Nh3 Bh3 12.gh3 d4 13.ed4 cd4 14.Ne4 Ba3 15.Ba3 Ra3 16.Nf6 Qf6 (< 16...gf6 17.Rg1+=) 17.Qe2 Kd8=+) 11.fe4=+ Be7 (better is 11...h6 12.Nf7 Kf7 13.Nd5 Nd5 (13...Ne4? 14.Qf3 Nf6 15.Nf6+–) 14.Qh5 g6 15.Qd5 Qd5 16.ed5 Bg7 17.Bg7 Kg7 18.Bc4 Nd7=) 12.ed5+/– Bg4 13.Be2 Bf5 (13...Be2!? 14.Qe2 Nbd7+/–) 14.Bc4 0–0 15.Nf3 Bc5 16.d4 Bb6 17.0–0 Bg4 18.Qc2 h6 19.h3 Bh5 20.Ne5 Qd6 21.Qc1 Nbd7 22.Nd7 Qd7 23.a4 Raa8 24.Ne2 Ba5? 25.Nf4+– Qf5?! 26.Nh5 Nh5?? 27.Rf5 Ng3 28.Kh2 Bc7 29.Rf4 Ne2 30.Qf1 Bf4 31.Kh1 Ng3= 32.Kg1 Nf1 33.Rf1?? Be3–/+ 34.Kh1 b6 35.Bd3 Rac8 36.d6 Rcd8 37.d5 Rd6=+ 38.Rf3 Bc5 39.Rg3 g6 40.Be4?? Rf6 41.Kh2 Bd6?? (42.Bf6 Rc8+–; 41...Rf4 42.Rg4 Rf1–+). Slavisa2 – kilmer47, Live Game Caissa's Web, 2004.

4.b5 Bd7 5.c4 a6 6.Qa4 Nf6 7.Nc3 Be7 8.Nf3 0–0 9.Bd3 Bg4 10.Ng5 h6 11.f3 hg5 12.fg4 Ng4 13.0–0 g6 14.Be4 Qc7 15.Nd5 Qd7?? (better is 15...Qd8+/–) 16.Nb6+– Qe8 17.Na8 ab5 18.Qa5 (better is 18.cb5 Nf6 19.Bb7 Qd7+–) 18...Nc6 19.Qc7 Qa8 20.Bc6 bc6 21.Qe7 Re8 (21...Qd8 22.Rf7! Qe7 23.Re7 Rf2+–) 22.Qf7 Kh8 23.Rf3 Nh6 24.Rh3 Rf8 (24...bc4 25.Rh6) 25.Rh6 1–0. pierre – oppo, internet, 2012.

4.bc5 dc5 5.Be5 Nc6 6.Bb5 a6 7.Bc6 bc6 8.Nf3 Bd6?? (better is 8...Nf6+/–) 9.Bg7+– f6 10.Bh8 Nh6 11.Bg7 (better is 11.e4+–) 11...Nf5 12.Bf6 Qf6 13.c3 Be6 14.Qa4 Bd7 (14...Ne7 15.Na3+–) 15.0–0 Ne7 16.Qh4 (16.Na3 Qg7+–) 16...Nd5 (16...Qh4 17.Nh4 Rb8 18.d3+–) 17.Qf6 (17.Qh7 Ne7+–) 17...Nf6 18.Na3 Rb8 19.Nc4 Be7 20.Rab1 Rb1 21.Rb1 Be6 22.d3 Bc4 23.dc4 Ne4 24.Rb6 Nc3 25.Ra6 Ne2 26.Kf1 Nc3 27.a3 Ne4 28.Rc6 Kd7 29.Rh6 Nf6 30.a4 Kc6 31.Ng5 Kb6 32.Nh7 Ka5 33.Nf6 Ka4 34.h3 Kb4 35.Nd5 Kc4 36.Ne7 Kc3 37.Rc6 (37…Kb2 38.g4+–) 1–0. Royalfork – ima1okru, Live Game Caissa's Web, 2004.

4.bc5 dc5 5.Be5 Qd5 (5...Nc6!? 6.Nf3 a6+/–) 6.Nf3 Bg4 (6...a6 7.Nc3 (7.Be2 Nc6 8.Bb2 Qe6 9.0–0 Nf6 10.Ng5 Qf5) 7...Qe6 8.Rb1+/– b5 9.Bf4 Be7 10.d4 Bf6) 7.Nc3 (7.Bb5 Nd7 (7...Nc6 8.Nc3 Qe6 9.h3 Bh5 10.Bf4 Rd8) 8.Nc3 Qe6 9.h3 Bh5 10.Rb1 a6) 7...Qe6 8.Bb8 (8.h3 Bh5+/– 9.Rb1 Nc6 10.Bf4 0–0–0) 8...Rb8+/– 9.Bb5 Kd8 (9...Ke7 10.h3 Bh5) 10.0–0 (10.Ng5 Bd1 11.Ne6 fe6 12.Rd1 Nf6+/–) 10...a6 (10...Be7+/–) 11.Be2 Bf3 12.Bf3 (12.gf3?! b5+=) 12...g5 (12...Nf6!? 13.d4 Ke8 14.Ne2+/–) 13.Bd5 (13.d4 Qd7+–) 13...Qd6 (13...Qe7 14.Rb1+–) 14.Rb1 (14.d4 cd4 15.Qd4 Qf6+–) 14...Nf6 (14...b5 15.Bf7 Nf6 16.a4+–) 15.Bb7 Kc7 (15...Bg7 16.Qe2+–) 16.Qf3 g4 (16...Bg7 17.Ne4 Ne4 18.Qf7 Qd7 19.Qd7 Kd7 20.Be4 Ke7+–) 17.Qf6! Qf6 18.Nd5 (18.Nd5 Kd6 19.Nf6+–) 1–0. Wall,Bill (2365) – Morty, Microsoft Gaming Zone, 1999.

3.e3 d5

4.a3 e4 5.c4 c6 6.Ne2 (6.cd5 cd5 7.d3 Nf6+=) 6...Nf6 7.Bf6 (7.cd5 cd5 8.Bf6 Qf6+=) 7...Qf6 8.Nbc3 Be6 (8...a5!?=) 9.cd5+= Bd5 10.Rc1 a5 (10...Qe5 11.Nf4 Be6 12.d4 ed3 13.Bd3=) 11.Nd5 cd5 12.Rc8 Kd7 13.Qc1 Qd6 (13...Qb6!?+/–) 14.Nd4+– (14.Nd4 g6 15.Bb5 Ke7 16.Re8 Kf6 17.Qb2 ab4 18.Nf5 Kf5 19.Qh8+–) 1–0. Rosner,Dirk (2175) – Fiesel,Hans_Juergen (1635), RSS5E easy–31, 2007.

4.Be5 Nc6 5.Bb5 Nge7 6.Nf3 f6 7.Bb2 a6+= 8.Bc6 Nc6 9.a3 Bg4 10.h3 Bh5 11.d3 Ne5 12.Nbd2 Qd6 13.Be5+/– fe5 14.0–0 e4 15.de4+– de4 16.Ne4 Qc6 17.Nd4?? Qg6?? 18.Qd3+– 0–0–0 19.g4 b6?? 20.f4 c5?? 21.Qa6 Kb8 22.bc5 Bc5 23.Nc5 Qf7 24.Qb6 Kc8 25.Rab1 Qc7 26.Qe6 Rd7+– 27.Nd7 Qd7 28.Rb8! Kc7 29.Qe5 (29.Qe5 Qd6 30.Nb5 Kb8 31.Nd6 Kc7 32.Nf7 Kb7 33.Rb1 Kc8 34.Rb8 Kd7 35.Qd6; 29.Qb6) 1–0. coloplayah (2150) – nwishn (1815), net–chess.com, 2006.

4.Be5 Nc6 5.Bc3 Bf5 6.a3 Nf6 7.Bb2 Bd6 8.c4 Bg4 9.Qb3 0–0. vampierketjen – topinho, net–chess.com, 2003.

4.Be5 f6 5.Bc3 a6 6.Bd3 c6 7.Qh5+– Ke7 8.Nf3 g6? 9.Bg6!+– Nh6 10.Bd3 Be6?? 11.Qh6 Bh6–+ 12.Na3 Nd7 13.0–0 Nb6 14.Nd4 Bg4 15.f3 Bd7 16.f4 Qg8 17.Rf3 Qf7 18.Bf5 Nc4 19.Nc4 dc4 20.e4 Bf5 21.ef5?? b5 22.Nc6 Kd6 23.Nd4 Rhe8 24.g3 Ra7 25.Ne6 Qh5 26.Kg2 Qf7 27.Re1?? Rae7 28.d3 Re6 29.fe6 Re6 30.Re4 Re4 31.de4 Kc6 32.e5 f5 33.Re3 Qd5 34.Kh3 Bg7 35.e6–/+ Bc3?? 36.e7+– Bb4 37.e8Q Kb6 38.Qe6 Qe6 39.Re6 Ka5 40.Rh6 c3 41.Rh7 Ka4 42.Kg2?? Ka3+= 43.Re7?? Be7–+ 44.Kf3 Kb2 45.Ke2 Kc2 46.h4 Kb2 (46...Kb2 47.a3 c2–+) 0–1. yulio – dhub noire, ChessWorld.net, 2006.

3.e3 Qf6

4.Bc4 Ne7 5.Nf3 Be6 6.Be6 Qe6 7.0–0 Ng6 8.Nc3 Qd7 (8...d5 9.a3=) 9.d4 Qf5 (9...f5 10.de5 de5 11.a3+=) 10.Nd5 Qc8 11.de5 de5 (11...c6 12.Nf4 Nf4 13.ef4+/–) 12.Ne5 (12.Be5 Ne5 13.Ne5 Bd6+–) 12...Ne5 (better is 12...c6!? 13.Ng6 hg6+/–) 13.Be5+– Bd6? (13...Na6 14.b5 c6 15.ba6 cd5+–) 14.Bg7 Rg8 15.Nf6 (15...Ke7 16.Ng8 Qg8 17.Bc3+–) 1–0. Wall,Bill – Jhet, internet, 2002.

4.d4 d5 5.de5 Qg6 +/–.

4.Nf3 (--> 1.b4 e5 2.Bb2 Qf6 3.Nf3 d6 4.e3).

4.f4 Nd7 5.Nf3 Qe7 6.fe5 de5 7.Na3 (7.a3 a5= (7...e4 8.Nd4 a5 9.Nc3 Ngf6 10.ba5 Ra5 11.Be2=) 8.Nc3 e4 9.Nd4 Ngf6 10.ba5 Ne5 11.Be2=) 7...f6 (7...Qb4 8.Nb5 Qc5 9.Ba3+= Qc6 10.Bf8 Kf8 11.Be2+=; 7...e4 8.Nb5 Ndf6 9.Nfd4 a6 10.Nc3 Qb4 11.Rb1–/+) 8.c3= (8.b5 Nb6 9.Be2 Qb4 10.Qc1 Bg4 11.Rb1+=) 8...Nh6 (8...a5 9.b5= (9.Qa4 c6 10.b5 Nb6 11.Qe4+=) 9...e4 10.Nd4 Nc5 11.Bc4=) 9.Be2 (9.Nc4 c6 10.Be2 e4 11.Nd4=) 9...c6 (9...a5 10.b5= e4 11.Nd4=) 10.0–0 g5 (10...e4 11.Nd4=) 11.b5 (11.e4 f5 12.ef5 Nf5+=) 11...Qd6 (11...g4 12.Nh4+=) 12.Nc4 (12.d4 g4 13.Nd2 f5+/–) 12...Qc7 13.bc6 Qc6 14.a4 Be7 (14...g4!? 15.Nh4 e4=) 15.d4+/– e4 (better is 15...g4!? 16.d5 Qc7+/–) 16.d5+– Qc5? (16...Qa6 17.Nfd2 f5 18.a5+–) 17.Ba3 (17.Ng5 Nb6 18.Ba3 Nc4 19.Bc5 Bc5 20.Ne4 Be3 21.Kh1 Ne5+–) 17...Qc7?? (better is 17...ef3 18.Rf3 Qc7 19.Be7 Ne5 20.Ne5 Qe7+–) 18.d6 Bd6 (18...ef3 19.dc7 fe2 20.Qe2 Ba3 21.Ra3+–) 19.Nd6 Kd8 20.Nd4 a5 (20...Re8+–) 21.Ne6 (21.Ne6 Ke7 22.Nc7+–) 1–0. Piriyev,Maksat – Gurbuz,Sedat Ertas, chessmoon.com, 2011.

3.e3 Bg4

4.Be2 Be2 5.Qe2 Nf6 6.c4 Nc6 7.b5 Nb4 8.d3 a6?? 9.a3+– ab5 10.ab4 Ra1 11.Ba1 Qa8 12.Bc3 bc4 13.dc4 Qa4 14.Nf3 Ne4 15.Bd2 Nd2 16.Qd2 Be7 17.0–0 0–0 18.Qc3 Bf6 19.Qa3 Qa3 20.Na3 e4 21.Nd4 Ra8 22.Nab5 Bd4 23.ed4 Ra4 24.Rb1 c5 25.dc5 dc5 26.bc5 Rc4 27.Nd6 Rc5 28.Nb7 f5 29.Nc5 (29.Nc5 Kf7 30.Rb7 Kf6 31.Rb6 Ke7 32.g4 fg4 33.Ne4+–) 1–0. hal1958 – errantknight, playchess.de, 2002.

4.Be2 f5 5.Bg4+/– g6?? (better is 5...fg4 6.Qg4 Na6 (6...Nd7+/– 7.Nf3 Ngf6 8.Qf5 g6 9.Qh3+/–) 7.a3 Nf6 8.Qc4 c6 9.Nf3+/–) 6.Bf3 Na6 (6...c6 7.Be2+–) 7.a3 (better is 7.Bb7 Nb4 8.Ba8 Qa8 9.Nf3+–) 7...Qh4 (7...c6+–) 8.Bb7 Qd8 (8...Rb8 9.Ba6 Qg5 10.Qf3+–) 9.Ba6 (9.Qf3 Nb4 10.ab4 Rb8+–) 9...Rb8 10.Ne2 Qg5 (10...Bg7 11.0–0+–) 11.0–0 Ne7 12.d4 h5 (12...Bg7 13.Nbc3 c6 14.de5 de5 15.Qd6+–) 13.de5 Rb6 (13...Bg7 14.Nd4 de5 15.Ne6+–) 14.Bc4 (14.Nf4 Qh6 15.Bc4 Rh7+–) 14...Bh6 (14...Bg7 15.Bd4 Be5 16.Bb6+–) 15.ed6 cd6 16.Bh8 Qg4 17.Bd4 Rc6 18.Bb5 Kd7 19.Bc6 (better is 19.Bf6 a6 20.f3 Be3 21.Kh1 Qg2 22.Kg2 ab5+–) 19...Nc6 20.Bf6 (better is 20.Bc5 Bf8+–) 20...Ne5 21.Be5 Qe4 22.Qd6 Ke8 23.Rd1 Be3 (23...Qc6 24.Qc6 Kf7 25.Rd7 Kg8 26.Qg6 Bg7 27.Qg7) 24.Qd8 (24.Qe6 Kf8 25.Rd8) 24...Kf7 25.Rd7 Ke6 26.Re7 1–0. nordlicht – mikedaddy, gameknot.com, 2001.

3.e3 Qg5

4.Nf3 Qf5 5.c4 Nc6 6.a3 Be6 7.d3 Nh6 8.h3 Be7 9.Nbd2 0–0 10.b5 Na5 (10...Nd8 11.d4 ed4 12.Nd4+=) 11.d4 (11.Bc3 b6+=) 11...e4= 12.Ng1 d5 13.c5 Nc4 (13...Bh4 14.g3 Be7 15.Bc3=) 14.Nc4 dc4 15.f3 (better is 15.Qc2!?+=) 15...ef3 16.Qf3 (16.Nf3!? Qe4 17.Qd2–/+) 16...Qc2–/+ 17.Qe2?? (17.Qf2 Bh4! 18.Qh4 Qb2–+) 17...Qb3 (17...Bh4 18.g3 Bg3 19.Qf2 Bf2) 18.a4?? (better is 18.Nf3 Nf5 19.Kf2 Ne3 20.Qe3 Qb2 21.Be2 Qb5 22.Rhb1–/+) 18...c3 (better is 18...Bh4 19.Qf2 Qb4 20.Kd1 Bf2–+) 19.Bc1 (19.Nf3 Nf5 20.Kf2 cb2 21.Rb1–+) 19...c2 (better is 19...Bh4 20.Qf2 Bf2 21.Kf2 Qc2 22.Ne2 a6 23.ba6 Ra6–+) 20.Ra3? (20.Qd3 Nf5 21.Qb3 Bb3 22.Bd3+=) 20...Qb1–+ 21.Qd2 (21.Kd2 Bc5! 22.Rc3–+) 21...Qc1?? (better is 21...Bh4 22.g3 Bg3 23.Ke2 Rae8–+) 22.Qc1+– Bf5 (22...b6 23.Qc2 bc5 24.dc5 Bh4 25.Kd2+–) 23.Bd3 Bd3 24.Rd3 Nf5 25.Nf3 Ng3 26.Rg1 b6 27.Qc2 bc5 (27...Rfe8 28.Ne5 Ne4 29.Qc4+–) 28.dc5 Rad8 (28...Rae8 29.Qc4 Bf6 30.Rd7+–) 29.Rd8 Rd8 30.Kf2 Nh5 31.g4 Nf6 32.Nd4 (32.g5 Nd7 33.Rd1 Nf8 34.Rd8 Bd8+–) 32...Nd7 (32...Bc5 33.g5 Nd7 34.Nf5+–) 33.Nc6 Re8 34.Ne7 (34.Ne7 Re7 35.Qd2+–) 1–0. GuestDHGV – GuestXZCG, freechess.org, 2017.

4.Nf3 Qh5 5.Be2 Bg4 (5...Qg6 6.0–0=) 6.h3 (better is 6.Nc3=) 6...Bf3?? (better is 6...e4 7.Nd4 Be2 8.Qe2 Qe2 9.Ne2 d5=) 7.Bf3+– (7.gf3?! Qg5=) 7...Qg5 (7...Qh4 8.Bb7 Qb4 9.Ba8 Qb2+–) 8.Bb7 Qg2 (8...d5 9.0–0 Bb4 10.Ba8 c6+–) 9.Bg2 (9.Bg2 c6 10.b5+–) 1–0. DEFFM – GuestBFVB, freechess.org, 2016.

3.e3 Nh6

4.c4 Bf5 5.d3 Be7 6.Nf3 Nc6 7.a3 0–0 8.Be2 e4 9.de4 Be4 10.Nc3 Bf5 11.0–0 Bf6 12.Bd3 Qd7 13.Qc2 Bd3 14.Qd3 Ng4 15.Rfd1 Rad8 16.Qd2 Nce5 17.Ne5 Be5 18.h3 Bh2? (better is 18...Nf6=) 19.Kh1+– Qf5?? (19...Be5 20.hg4 Qg4+–) 20.hg4 Qg4 21.Kh2 Qh4 22.Kg1 Qc4 23.Ne2 (23.Nd5 Rd7 24.Rac1 Qh4 25.Rc7 Rc7 26.Nc7 Rd8+–) 23...d5 (23...f6 24.Rac1 Qf7 25.b5+–) 24.Rac1 Qb3 25.Qd4 b6 (25...f6 26.Rc7 Rf7+–) 26.Qg7 1–0. Fournier,Frederic – PAMPITA5, Active, 2007.

4.c4 Bg4 5.Be2 f5 6.h3 Be2 7.Qe2 Nd7 8.Nf3 Qe7 9.a4 d5 (9...e4!? 10.Nd4 Ne5+=) 10.cd5+= Qb4 (10...0–0–0!? 11.Nc3 e4+=) 11.Be5+/– Ne5 12.Ne5 0–0–0 13.Nc3 Bd6? (13...Qa5 14.Rb1 Re8 15.Nc4+–) 14.Nd3 (better is 14.Nc4!? Qc5 15.Rb1+– (15.Nd6?! Qd6 16.Rb1 Nf7+–)) 14...Qa5 15.0–0 g5 16.Qh5 Ng8 17.Qg5 Ne7 18.Nf4 Rhg8 19.Qh4 Rde8 20.Nh5 (better is 20.Nb5 Qb6 21.Rab1+–) 20...Nd5+/– 21.Nf6 Nf6 22.Qf6 a6 23.Qh6 (23.Rab1 f4 24.ef4 Rg6+/–) 23...Qe5 24.f4 Qc5 (24...Qe6 25.Qe6 (worse is 25.Qh7 Rh8 26.Qg7 Reg8+=) 25...Re6 26.Kf2+=) 25.Rf3 (25.Qh7!? Rh8 26.Qf7+–) 25...Qc6 26.Raf1 b5? (better is 26...Qd7!?+=) 27.ab5 ab5 28.Qh7 b4? (better is 28...Ref8!?+–) 29.Qf5 Kd8 30.Qb5 Qa8 (30...Qd7 31.Qd7 Kd7 32.Ne2+–) 31.Qa4 (better is 31.Nd5!? Rg6 32.Nb4 Bb4 33.Qb4 Reg8+–) 31...Qa4 32.Na4 c5 (32...Ke7 33.Nb2+–) 33.Rb1 (33.Rc1 b3+–) 33...c4 (33...Ke7+–) 34.Nb6 Re4 35.Nd5 Rf8 36.Nb4 Bb4 37.Rb4 Rf5 (37...Rfe8 38.f5 R8e7 39.f6+–) 38.d3! Re6 (38...cd3 39.Rd4 Double attack (39.Re4 Pinning; 39.Re4 Deflection)) 39.Rc4 Ke7 40.e4 Rb5 41.f5 Rb1 42.Rf1 Rf1 43.Kf1 (43.Kf1 Rh6 44.e5+–) 1–0. Hal1958 – Aracnido, playchess.de, 2004.

4.Be2 Nf5 5.c4 Na6 (5...Be6 6.Nc3=) 6.a3 (6.d4 Qg5 7.g4 Nh4=) 6...c5 (6...Nh4 7.g3 Ng6 8.d4=) 7.Qa4 (7.bc5 Nc5 8.d4 ed4 9.ed4 Qb6=) 7...Bd7 8.b5 Nc7 9.Qc2 a6?? (9...Nh4 10.g3 Ng6 11.f4=) 10.a4?? (better is 10.b6 Ne6 11.Qf5+/–) 10...ab5 (10...Nh4 11.g3 Ng6 12.Nf3=) 11.ab5 Ra1 12.Ba1 h6 (12...Nh4 13.g3 Ng6 14.h4=) 13.Nf3+= Ne6? (13...Qf6 14.0–0+=) 14.Qa4?? (better is 14.Qf5 Nf4 15.Qe4 Ng2 16.Kd1+–) 14...Be7 (14...e4 15.Ng1=) 15.Nc3 0–0 16.Nd5 (16.0–0 Nh4+=) 16...e4= 17.0–0 (better is 17.Ng1 Nc7 18.Bc3=) 17...ef3–/+ 18.Ne7 (18.Bf3 Bc8–/+) 18...Qe7–+ 19.Bf3 b6 (19...Bc8 20.Qc2 Ng5 21.Bd5–+) 20.Qa7 (better is 20.d3–+) 20...Be8?? (better is 20...Ng5 21.Be2 Qd8–+) 21.Qb6= Ng5 (21...Nh4 22.Be4=) 22.Bd5 Kh8 (22...Ne4 23.d3 Nf6 24.Bf6 Qf6 25.Qc7+=) 23.Qa5 (23.e4 Nd4 24.Bd4 cd4 25.Qd4 Bd7+=) 23...f6 (23...Bd7 24.e4 Nh4 25.f4=) 24.d3 (24.e4 Nd4 (24...Ne4? 25.Re1 Bg6 26.d3+–) 25.Bd4 cd4+=) 24...Bf7 25.Bc6 Qe6 (25...Rb8 26.e4 Nd4 27.Bd4 cd4 28.Ra1+=) 26.b6 (26.Qa7 Bg6 27.Bd5 Qe8=) 26...Nh4 (26...Ne3 27.Rb1 Ng4 28.b7=) 27.Bd5 1–0. DEFFM – GuestDGDX, freechess.org, 2016.

4.Nf3 Ng4 5.h3 Nf6 6.b5 b6 7.Bc4 a6 8.ba6 Na6 9.0–0 Ne4?? 10.Bd5+– Nf2 11.Rf2 Ra7 12.Nh2 f6 13.Qh5 g6 14.Qe2 Nb4 15.Qb5 c6 16.Bc6 Nc6 17.Qc6 Bd7 18.Qe4 Rc7 19.Nc3 Bc6 20.Qb4 b5 21.Qh4 Qe7 22.Rb1 g5 23.Qb4 Qg7 24.Ng4 d5 25.Qa5 Bd6 26.Nf6 Ke7 27.Nfd5 (27.Nfd5 Kd7 28.Nb5 Bd5 29.Nc7 Bg2 30.Nd5 Bd5 31.Qd5+–) 1–0. ahmed sharkawy_1 – pinski, ChessWorld.net, 2005.

3.e3 a5

4.a3 ab4

5.ab4 Ra1 6.Ba1 Nc6 (6...Nf6 7.d4 Bf5 8.Ne2 Nbd7 9.Ng3=) 7.b5 Nce7 (7...Nb4 8.c3 Nd5 9.c4=) 8.Nf3 (8.Be2 Ng6 9.Nf3=) 8...Ng6 9.Be2 (9.Nc3=) 9...f5 10.0–0 Be7 11.Nc3 (11.d4 e4 12.Nfd2 d5=) 11...Nf6 12.Bc4 d5 13.Bb3 c6 14.Re1 (14.d4 e4 15.Ne5 Bd7=) 14...0–0+= 15.h3 Kh8 16.Qe2 (16.Bb2 Qd6+=) 16...Bd6 (16...e4 17.Nh2+=) 17.bc6 bc6 18.d3 Bb4 (18...Qc7 19.Rb1+=) 19.Rb1= Be6 (better is 19...e4 20.Nd4 Bd7=) 20.e4?? (better is 20.Bd5!? cd5 21.Rb4+=) 20...Nf4 (better is 20...fe4!? 21.de4 Bc3 22.Bc3 Ne4–+) 21.Qd1 fe4 22.Ne5 Qd6 (22...Bd6 23.Ne2 (23.Nc6? Qe8–+) 23...Ne2 24.Qe2–/+) 23.d4 (23.Ne2 Ne2 24.Qe2 Ra8+=) 23...Nd7 24.Nd7? (better is 24.Ne2!? Ne5 25.de5 Ne2 26.Qe2+=) 24...Qd7 25.Ne2? (25.Na2 Bd6 26.Nc3–+) 25...Bd6?? (25...Ng2 26.Bd5 Bd5 (26...cd5 27.Rb4 Qf7 28.f3–+) 27.Rb4 e3–+) 26.Nf4+= Bf4 27.Ba4 (27.Qh5 Rf5 28.Qe2 Rf6–/+) 27...Qe8 (27...Bh3 28.c4 Qf5 29.cd5–+ (29.Bc6?? Bg3 30.f3 ef3 31.gf3 Qg6–+)) 28.Rb6–/+ Bd7 29.Qe2 Qg6 30.Rb3? (30.Kh1 Qh6 31.Qf1 Bd6 32.Bc6 Bc7 33.Bd7 Qb6–+) 30...h6 (better is 30...Ra8!? 31.Ra3 c5 32.Bd7 Ra3 33.Bb2–+) 31.c4 Ra8 32.Ra3 Bh3! 33.Rh3 (33.g3 dc4 34.Bb2 Rb8–+) 33...Ra4 34.Qd1 Rc4 35.Rh4 (35.Rc3–+) 35...Rc1 (35...Rc1 36.Qc1 Bc1–+) 0–1. Neumann,Frank – Hanisch,Thomas, Stralsund, 1992.

5.ab4 Ra1 6.Ba1 Nf6 7.Bb5 c6 8.Be2 Be6 9.Nf3 Be7 10.0–0 Nbd7 11.d3 0–0 12.c3 Nb6 13.Nbd2= h6 14.Bb2 Qc7 15.Qc2 d5 16.Ra1 Ra8 17.Qb1 Ra1=+ 18.Qa1 e4 19.Nd4 ed3 20.Bd3 Ng4 21.g3 Bd6 22.Ne6 fe6 23.Be2 Ne3?? 24.fe3+– Bg3 25.Nf3 Bd6+/– 26.c4 dc4 27.Be5+/– Nd5 28.e4 Be5 29.Ne5 Nb4+= 30.Bc4 Qd6 31.Nf3 Qc5? 32.Qd4+/– Qd4 33.Nd4 Kf7 34.Be6 Kf6 35.Kf2?? c5–/+ 36.Bd5? cd4 37.Bb7 Ke5 38.Ke2 g5 39.Kf3 h5 40.Bc8 g4 41.Ke2 Kf4 42.Bf5 h4 43.Bg6 g3 44.hg3 hg3 45.Kf1 d3 46.e5 Ke5 47.Bd3 Nd3 48.Kg2 Kf4 49.Kg1 Kf3 50.Kf1 Nf4 51.Kg1 Ne2 (52.Kf1 g2 53.Ke1 g1Q 54.Kd2 Qc1 55.Kd3 Qc3#) 0–1. guest508 – guest257_jjirous, ICC, 1999.

4.ba5 Ra5

5.d4 Nf6 6.de5 Re5 7.Be5+/– de5 8.Qd8 Kd8 9.Nf3 Bc5 10.Ne5+– Be6 11.g3 h5 12.Bh3! Ke8 13.Be6 fe6 14.0–0 h4 15.Nc4 b5 16.Ne5 hg3 17.hg3 Bd6 18.Nf3 e5 19.Rd1 e4 20.Nh2 Nc6 21.Nc3 b4 22.Nd5 Be5 23.Nf6 gf6+/– 24.Rab1 f5 25.Nf1 Rh3? 26.Kg2 Rh5. undergearmalaysia – bgoodier, net–chess.com, 2003.

5.Nf3 Bg4 6.Be2 Nc6 7.0–0 Nf6 8.h3 Be6 9.c4 Be7 10.d3 0–0 11.Nbd2 Qd7 12.Bc3 Ra7 13.d4 ed4 14.ed4 d5 15.Ne5 Ne5 16.de5 Ne8 17.Bd4 (17.Nb3 f6=) 17...c5+= 18.cd5 Qd5 19.Bc3 Ra2 20.Ra2 Qa2 21.Ne4 (21.Qb1!?+=) 21...Nc7 22.Re1 Nd5 23.Qd3 Nf4 24.Qe3 Ne2 25.Re2 Qb1 26.Re1 Qb6 27.Re2 Rd8 28.Rb2 Qc6 29.Ba5 Rd1 30.Kh2 Qa6 31.Bb6 (better is 31.Bc7!? Bd5 32.Bd6 (32.Nc5?? Rh1 33.Kg3 Qg6 34.Qg5 Qg5) 32...Bd6 33.ed6 Be4 34.Qe4 Qd6 35.g3–/+) 31...Qa1 32.Rd2 Rh1 (32...Qe5?! 33.f4 Qe4 34.Qe4 Rd2 35.Qe3–/+) 33.Kg3 Qe5 34.Qf4 Qf4 35.Kf4 c4 36.Nc5 (36.Bc5 Bh4–+) 36...Rb1 37.Ne6 Rb6 38.Nd4 c3 39.Rc2 (39.Rd3 Rb4 40.Kf3–+) 39...Rb4 40.Ke3 (40.Rc3 Rd4 41.Ke3–+) 40...Bc5 41.Rc3 (41.Kd3 Bd4 42.f4 b5–+) 41...Bd4 (41...Rd4?! 42.Rc5 Rd8 43.f4+=) 42.Kd3 Bc3 43.Kc3 Rf4 0–1. Sotiropoulou – Xylogiannopoulos (1970), Nikea Fysiolatriko op, 2008.

4.b5

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

4.b5 b6 5.c4 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 e5 5.c4 b6).

4.b5 c5 5.c4 Nf6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 e5 5.c4 c5).

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

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

3.e3 a6

4.a3 b5 5.Be2 Be7 6.Nf3 Bf6 7.0–0 e4=+ 8.Bf6 Qf6 9.Nd4 c5 10.bc5 dc5 11.Nb3 c4 12.Nd4 Ne7 13.Nc3+/– Nbc6 14.Nc6 Nc6 15.Ne4 Qg6 16.d3 Bd7? 17.Bf3?? 0–0–0 18.Nc5 Ne5 19.Nd7 Nf3? 20.Qf3+– Kd7 21.dc4 bc4 22.Rfd1 Ke7 23.Qb7 Ke6 24.Qa6 Kf5 25.Qa5 Kf6 26.Rd8 Rd8 27.Qd8 Kf5 28.Rb1 Qe6 29.Rb5 Ke4 30.Qd4# 1–0. Trkn – Marcus, itsyourturn.com, 2000.

4.a3 Nc6 5.d3 Nf6 6.Nf3 Ng4 7.c4 Nf6 8.d4 e4 9.Nfd2 d5 10.cd5 Qd5 11.Nc3 Qe6 12.Qc2 b5 13.Nde4 Ne4 14.d5 Qg6 15.Qe4 Ne7 16.Qg6 hg6 17.e4 Bb7 18.a4 ba4 19.Na4 Nc8 20.Nc5 Bc5 21.bc5 Rg8 22.c6 Ra7 23.Bd4 Nb6 24.cb7 Rb7 25.Ba6 Rb8 26.Bb5 Ke7 27.Bc6 Kd6 28.e5 Ke7 29.Bc5 Kd8 30.e6 fe6 31.de6 Re8 32.0–0–0 Kc8 33.e7 Re7 34.Be7 Ra8 35.Rd8# 1–0. kamret (2195) – wrightsaved, GameColony.com, 2003.

4.a3 Bd7 5.d4 ed4 6.ed4 Nf6 7.Nf3 Be7 8.Bd3 d5 9.0–0 b5 10.Ne5 0–0 11.Re1 Bd6 12.Bc1 c6 13.Bf4 Qc7 14.Nd2 Be6 15.Nb3 Nbd7 16.Nc5 Be5 17.Ne6 fe6 18.de5 Ne4 19.Qg4 Rf4? 20.Qf4+– Qe5 21.Qe5 Ne5 22.Be4 de4 23.Re4 Nc4 24.Re6 Rc8 25.f4 Kf7 26.f5 Rc7 27.a4 g6 28.g4 gf5 29.gf5 Nb2 30.ab5 ab5 31.Ra6 Nc4 32.Rec6 Rc6 33.Rc6 Ne5 34.Rc5 Kf6 35.Kf2 Kf5 36.Rb5 Ke4 37.Re5! Ke5 38.Ke3 Kd5 39.Kf4 Kc4 40.c3! Kd5 41.Kg5 1–0. themonkey – GELLP, GameColony.com, 2002.

4.a3 Nf6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 a6).

4.a4 Nd7 5.c4 Ne7 6.Nc3 Nb6 7.d4 (7.a5 Nd7 8.Nf3 Nc6 9.Qb3 Nf6) 7...ed4 8.ed4 c6 (8...Nc6 9.a5 A) 9...Qe7 10.Qe2 Nd4 11.Qe7 Be7 12.ab6 Nc2 13.Kd1 Na1 14.Nd5+– (14.Ba1?! c6+=); B) 9...Nd7+=) 9.c5 (9.a5!? Nd7 10.d5+=) 9...Nbd5= 10.Bc4 (10.Ne4 Ng6+=) 10...Be6 (better is 10...Nb4 11.Qb3 Ned5 12.Nd5 Nd5 13.Bd5 cd5 14.Qd5 Be7+=) 11.Nf3?? (11.Nd5 Nd5 12.Nf3 Nb4+=) 11...Nb4?? (better is 11...Nc3 12.Qb3 Bc4 13.Qc4 Ne4–+) 12.Be6= fe6 13.Ng5 Qd7 14.0–0 h6 (14...dc5 15.dc5 Nd3 16.Ne6 Nb2 17.Qe2+=) 15.cd6 (15.Nce4!? Ng6 16.Qh5=) 15...hg5+= (15...Qd6 16.Nce4 Qd5 17.Qh5 Kd7 18.Nc5 Kc7 19.Nge6 Kb8 20.Qe5 Qe5 21.Nd7 (21.de5?! Kc8+/–) 21...Ka7 22.de5+– (22.Ne5?! Rg8+=)) 16.de7 Be7 17.Re1 0–0–0 18.Qg4? Exerts pressure on the isolated pawn (better is 18.Ba3+=) 18...Nc2–+ 19.Re6 (19.Qe6 Na1 20.Ba1 Qe6 21.Re6 Bf6–+) 19...Rh4 20.Qf5 (20.Qd1 Qe6 21.Qc2 Rhd4 22.Rf1–+) 20...Nd4 (20...Na1?! 21.Ba1 Rd4 22.h3–+) 21.Rd1 (21.Nd5 Nf5 22.Nb6 Kc7 23.Nd7 Rd7 24.a5–+) 21...Nf5 (21...Ne6?! 22.Rd7 Kd7 23.Ne4–+) 22.Rd7 Rd7 23.g3 Rh6 (23...Rb4 24.Ba3 Rc4 25.Be7 Re7 26.Re7 Ne7 27.Ne2–+) 24.Rh6 (24.Re4 b5–+) 24...gh6 25.Ne4 c5 (25...b5 26.ab5 cb5 27.Kg2–+) 26.Bc3 (26.a5 c4 27.Bc3 Rd3–+) 26...b5 27.ab5 ab5 28.g4 (28.f4 b4 29.Be5 c4–+) 28...Nh4 (better is 28...Rd1 29.Kg2 Nh4 30.Kh3 Rd3 31.f3 Rf3 32.Ng3–+) 29.Kf1 b4 30.Bg7 b3 31.Nc3 (31.Bc3 Rb7 32.Bb2 Rb4–+) 31...b2 32.Ke2 Rb7 (better is 32...Bd8!? 33.Bh6 Ba5 34.Nb1–+) 33.Nb1 c4 34.Kd1 Nf3 35.Bh6 (35.Kc2–+) 35...Rd7 36.Kc2 Bf6 0–1. mtr – goodevening, Caissa's Web, 2001.

4.a4 Be7 5.f4 Bf6 6.Nf3 e4 (6...ef4 7.Bf6 Qf6 8.Ra3–/+ Ne7 9.Be2 fe3) 7.Bf6+= Qf6 (withdraw) (7...Qf6 8.Nd4 c5 (8...Nc6 9.c3 Nge7) 9.bc5 dc5+=; worse is 7...gf6 8.Nd4+= Qe7 9.Nc3 c5; 7...Nf6 8.Nd4 0–0 9.Be2 b6) 8.Nd4 Nc6 9.c3 Nge7 +=. mtr – DANTON3, Caissa's Web, 2001.

4.a4 Qf6 5.c4 (5.Nc3 Be6=) 5...Be7 (5...Be6 6.Nf3=) 6.b5 (6.Nc3 Be6=) 6...ab5 (6...Qf5 7.d4=) 7.ab5 Ra1 8.Ba1 Qg6 9.Nf3 (9.b6 c6=) 9...Bf6 (9...Nf6 10.d4 e4 11.Nfd2+=) 10.g3 (10.d4 Bf5 11.Qa4 Bc8+=) 10...Bg4 (10...e4 11.Bf6 Nf6 12.Nh4=) 11.Be2 Bh3 (11...Nh6 12.Nc3+=) 12.Nc3 Bg2 (12...e4 13.Nd4 Bd4 14.ed4=) 13.Rg1+= Bf3 (13...Bh3 14.Qa4 Ne7 15.d3+=) 14.Bf3+/– Ne7 (14...b6 15.Be4 Qh6 16.Qa4+/–) 15.Bb7 0–0 (15...Nd7 16.Be4 Qh6 17.Na4+/–) 16.Be4 Qh6 17.h4 (better is 17.Qg4+/–) 17...g5? (better is 17...Nd7+/–) 18.hg5+– Qg5 19.Rh1 (better is 19.f4 Qg7 20.Rh1+–) 19...Ng6 (19...h6 20.Rh5 Qg7 21.Qf3+–) 20.Bf3 (better is 20.Rh5+–) 20...Bg7 21.Ne4 (21.Bg2 f5+–) 21...Qe7 22.Ke2 (22.Nc3!? Nd7+–) 22...f5 23.Nc3 Kh8 (23...e4 24.Bh5 Ne5 25.Nd5+–) 24.Nd5 (24.d3 Nd7+–) 24...Qd7 25.Bh5 (25.d3 c6 26.bc6 Nc6+–) 25...Kg8 26.Bg6 (26.d3 c6 27.bc6 Nc6+–) 26...hg6 27.Rh2 (27.f4 c6 28.bc6 Nc6+/–) 27...c6+/– 28.Nb6 (28.bc6 Nc6 29.d3 Ra8+/–) 28...Qb7 (28...Qa7 29.Na4 d5+/–) 29.Na4 (better is 29.Qb3!?+/–) 29...cb5= 30.Nc3 (better is 30.Qb3 b4 31.c5 Qf7 32.Qb4=) 30...bc4–/+ 31.f3 (31.d3 cd3 32.Qd3 Qa6–/+) 31...Nc6 0–1. GuestZQRT – GuestTTDX, freechess.org, 2016.

4.a4 Qh4 5.c4 Be6 6.Nf3 Qh5 7.Be2 Nd7 (better is 7...Qg6=) 8.Ne5+/– Qg5 9.Nd7 Bd7 10.Bf3 c6 11.Nc3 Nf6 12.Ne4 Ne4 13.Be4 d5 14.h4 (better is 14.cd5!? f5 15.dc6 bc6 16.Bf3+–) 14...Qe7= 15.Bd3 dc4 16.Bc4 Qb4 17.Qc2 0–0–0 (17...Be6 18.Be6 fe6 19.f4=) 18.Bf7 h5 (18...Qg4!? 19.Rh2 Bb4+=) 19.Bd4 Qe7 20.Qb3 c5? (better is 20...Bf5 21.Kd1 Rd7+/–) 21.Rc1+– Rh6? (21...Ba4 22.Bc5 Qc7 23.Qa4 Bc5+–) 22.Bc5 (22.Rc5?! Bc6 23.Re5 Ba4 24.Be6 Re6 25.Qe6 Qe6 26.Re6 Bb5+–) 22...Rc6 (22...Qc5 23.Rc5 Bc5+–) 23.Be7 (23.Rb1 Bf5 24.Be7 Bb1 25.Bd8 Be4 26.Bh5 Kd8+–) 23...Rc1 24.Ke2 Rh1 25.Bd8 (25.Qc4 Bc6 26.Be6 Rd7 27.Bf8 Kb8 28.Qf4 Ka8 29.Bd7 Bd7+–) 25...Kd8 26.Qb7 (better is 26.Qb6 Kc8 27.Bd5 Bc6 28.Bc6 bc6 29.Qc6 Kd8+–) 26...Ra1 (26...Rh4 27.Qd5 Kc7 28.Qa5 Kc8 29.Qa6 Kd8 30.Qa5 Ke7 31.Bb3+–) 27.Qb8 (better is 27.Qb6 Ke7 28.Bh5 Ra4 29.Qc5 Ke6 30.Qf8 Bb5 31.Kf3 g6 32.Bg6 Kd7+–) 27...Ke7 28.Qe5 Kf7 29.Qa1 Kg8 (29...Be7 30.Qe5 Kf8 31.d3+–) 30.Qd4 (better is 30.Qa2!? Kh7+–) 30...Be8 (30...Bg4 31.Kd3 Kf7 32.Qd5 Kf6 33.f3+–) 31.Qc4 Kh8 (31...Bf7 32.Qa6 Kh7 33.a5+–) 32.Qc8 1–0. forsetinn (1680) – 2altro79b, gameknot.com, 2013.

4.a4 h6 5.c4 Nc6 6.b5= ab5 (6...Nb4 7.Bc3 a5 8.d4=) 7.ab5 Ra1 8.Ba1 Nb4 (8...Nb8 9.d4 e4 10.Nd2+=) 9.Qb3+= d5 (9...c5 10.Bc3+=) 10.Be5+/– Nf6 (10...Bf5 11.cd5 f6 12.Bg3+/–) 11.Bc3 (11.d4 Bf5 12.Na3 Qa8 13.Bf6 Qa3 14.Qa3 Nc2 15.Kd1 Na3=) 11...c5 (11...Qe7 12.Nf3+/–) 12.Bf6 (12.Bb4!? cb4 13.d4+/–) 12...Qf6+= 13.cd5 Bd6 14.Be2 (14.Nf3 0–0+/–) 14...0–0 (14...Qg6 15.Nf3+=) 15.Nf3 Bg4 (15...Qg6 16.0–0+/–) 16.0–0+/– Bf3 (16...Ra8 17.Nc3+/–) 17.Bf3 (17.gf3?? Qg5 18.Kh1 Qh5–+) 17...Qe5 18.g3 Qf6 (18...Qf5 19.e4 Qd7 20.Na3+–) 19.Bg2 (19.Be4 Ra8+–) 19...b6 (19...Qg6 20.Qc4+–) 20.Nc3 (better is 20.Qc3 Qe7 21.d4+–) 20...Nd3?? (better is 20...Rd8+–) 21.Ne4 Qe5 (21...Qe7 22.Qd3 Rd8 23.Nd6 Qd6 24.Ra1+–) 22.Qd3 Rc8 (22...Rd8 23.f4 Qe7 24.Nd6 Qd6 25.e4+–) 23.Nd6 (23.Qc3 Qe7+–) 23...Qd6 24.Qc4 1–0. GuestYCPF – kalikali, freechess.org, 2016.

4.Nc3 Ne7 5.Nf3 c6 6.Be2 Ng6 7.0–0 d5 8.a3 Bd6 9.e4 Be6 10.d4+= de4 11.Ne4+/– Bc7 12.de5 Qd1 13.Rad1 0–0 14.Nd6 Nd7 15.Ng5 Nf4 16.Bf3 f6? 17.Ne6 Ne6 18.Bg4 f5 19.Bf5 Bd6 20.Be6 Kh8 21.ed6 1–0. Wall,Bill – RevJohnny, Internet, 2003.

4.Nc3 Bf5 5.Qf3 Bc8 6.Nh3 Nc6 7.a3 Nf6 8.Ng5 h6 9.Nge4= d5? 10.Nf6+– gf6 11.Nd5 f5 12.Bc4 Rg8 13.0–0 e4? 14.Qh5?? b5?? 15.Ba2 Be6?? 16.Nf6 Ke7 17.Ng8 Ke8 18.Be6 Ne5 19.Be5 Qd2 20.Qf7 Kd8 21.Rad1 1–0. Heat – gregschess, Live Game Caissa's Web, 2004.

4.c4 Be7 (--> 3.e3 Be7 4.c4 a6).

4.c4 Ne7 5.Nf3 Ng6 6.Nc3 =. pcmvr (2870) – zekota (2125), net–chess.com, 2009.

4.c4 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 a6).

4.c4 Qg5 5.Nf3 Qh6 6.g3 (6.Nc3 Nf6=) 6...Bg4 7.Bg2? (better is 7.d3=) 7...e4–+ 8.Qa4 Bd7 9.b5 ef3 10.Bf3 c6 11.bc6 Nc6 12.Qb3 Rb8 13.0–0 Be7 14.Nc3 Nf6 15.d4 0–0 16.Nd5 Nd5 17.Bd5 Bf6 (17...b5 18.Bc3–+) 18.Rab1 Be6 (18...Qg6 19.Ba3 Be7 20.Qb6–+) 19.Bg2? (better is 19.Ba3 Na5 20.Qa4–+) 19...Na5–+ 20.Qa4 Nc4 21.Bc1 (21.Ba3 b5 22.Qa6 Bc8–+) 21...d5 22.e4 Qg6 23.ed5 Qb1 24.de6 b5 25.ef7 Kf7 26.Bd5 Kg6 27.Qa6 h6 (better is 27...Qf5 28.Be6 Qf3 29.Bc4 bc4 30.Qc4 Rfc8–+) 28.Qe6? (28.Bf4 Qd3 29.Bb8 Rb8 30.Qe6–/+) 28...Rbe8 (28...Qa2?? 29.Be4 Kh5 30.Qh3 Bh4 31.Qh4#) 29.Qg4 Kh7 30.Bh6 Qg6 (30...Re1 31.Re1 Qe1 32.Kg2 gh6 33.Be4 Kh8 34.Qg6–+) 31.Qg6 Kg6 32.Bc4?! (32.Bf4–+) 32...bc4 (32...gh6?! 33.Bb5 Rd8 34.a4–+; 32...Kh6?! 33.Bb5 Rd8 34.Kg2–+) 33.Be3 c3 34.a4 (34.Kg2 Rc8–+) 34...c2 35.a5 (35.Rc1 Rc8 36.Kf1 Rfd8–+) 35...Rc8 (better is 35...Re3 36.fe3 Rb8 37.Kg2–+) 36.a6 (36.Rc1 Rfd8 37.Kf1 Bd4 38.Bd4 Rd4–+) 36...Ra8 (better is 36...Rfd8!? 37.h4–+) 37.Ra1 Bg5 (37...Rfc8!? 38.Kg2–+) 38.f4 Bf6 39.a7 (39.Kf2–+) 39...Rfe8 40.Kf2 Red8 (40...Ra7 41.Ra7 Bd4 42.Rg7 Bg7 43.Bc1 Bd4 44.Kf1–+) 41.g4 (41.Ke2 Bd4 42.Bd4 Rd4 43.Ra6 Kh7–+) 41...Bd4 (41...Rd4?! 42.Ra6 Rd3 43.Bc1–+) 42.f5 Kh7 43.Ke2 (43.Rc1–+) 43...Re8 (43...Re8 44.Rc1 Re3 45.Kd2 Ra7 46.Rc2 Raa3–+) 0–1. GuestHSHW – GuestLKQK, freechess.org, 2017.

4.c4 Qh4 5.Nf3 Qf6 (5...Qe7 6.d4=) 6.Qa4 (6.Nc3 Nc6+=) 6...Bd7= 7.b5 a5 (7...Bg4!?=) 8.Nc3+= c6 9.Bd3 cb5 (9...Qe6 10.Bc2+=) 10.cb5+/– b6 (10...Qd8 11.Be4+/–) 11.Nd5 Qd8 12.Qc4 (12.Bh7 Ne7 13.Ne7 Be7+/–) 12...Ra7 13.Rc1 Nf6 (better is 13...Be7!?+/–) 14.Nc7+– Ke7 (14...Rc7 15.Qc7 Be6 16.Qd8 Kd8 17.Bc4+–) 15.Ne5! de5 (15...de5 16.Ba3) 16.Ba3 1–0. Janek – Larry, internet free game, 2017.

4.c4 h5 5.h3 g6 6.Nc3 Be6 7.Nf3 Nd7 8.d4 ed4 9.Nd4 Bg7 10.Ne6 fe6 11.Qb3 Nh6 12.Bd3 Qg5 13.c5 d5 (13...Qf6!?+=) 14.Nd5+/– ed5 15.Bg7 Rg8? (better is 15...Rh7 16.Bh6 Rh6+–) 16.Bh6 Qh6 17.Qd5 0–0–0 (17...Qg7 18.0–0 0–0–0 19.Ba6 Nc5 20.Qc5 ba6 21.Rac1+–) 18.Ba6! c6 (18...ba6 19.Qa8 Combination) 19.Qc6 1–0. Janek – anony, internet, 2016.

4.Bc4 b5?? 5.Bd5?? c6= 6.Bb3 Nf6 7.Nf3 h6 8.Nc3 Be7 9.0–0 0–0 10.d3 a5=+ 11.ba5 Ra5 12.Ne2 Ra7 13.c4 bc4 14.Bc4 Ba6 15.Bb3 Nbd7 16.Rc1 Nc5 17.d4 Nb3=+ 18.ab3 Bb5 19.Re1 Ra2 20.Rc2 ed4 21.Ned4+/– Qb6? 22.Nb5 Qb5? 23.Qc1 c5= 24.Nd2 Rfa8 25.Bc3 Rc2 26.Qc2= Nd5 27.Bb2 Ra2 28.e4 Nb4–/+ 29.Qc3? Bf6–+ 30.Qh3 Rb2?? 31.Qc8= Kh7 32.Qf5 g6 33.Qf6 Qd3?? 34.Qb2 1–0. TriAngel – MrsPiggy, ICC, 1999.

4.Bc4 Nc6 5.a3= d5 6.Be2 Nf6 7.Nf3= Bd6 8.0–0 0–0 9.d3 Bf5 10.Nbd2 e4 11.de4 de4 12.Nd4 Nd4 13.Bd4 Nd5 14.c4+= Nf6 15.c5 Be7 16.Bc4 Re8 17.f3+/– c6 18.Qb3 Nd5?? 19.fe4+– Ne3 20.Bf7 Kh8 21.Be3 (21.Be3 Bg6 22.Be8 Qe8 23.Bd4+–; 21.Qe3 Bg4+–) 1–0. Wall,Bill – Astar, internet, 2003.

4.Bc4 Be6 5.Be6= fe6 6.Nf3 h6 7.0–0 Nc6 8.a3 Qd7 9.c4+= 0–0–0 10.b5+/– ab5 11.cb5 Na7 12.b6+– cb6 13.Qb3 Kb8 14.Qb6 Rc8 15.Nc3 Nf6 16.Rfc1 Rc6 17.Qb3+– Be7 18.Na4 Rc1 19.Rc1 Rc8 20.Rc8 Qc8 21.Ne5!+– de5?? 22.Be5 (22.Be5 Qc7 23.Bc7 Kc7 24.Qb6 Kb8 25.Nc5 Bc5 26.Qc5+–) 1–0. Wall,Bill – DouglasN, internet, 2000.

4.d4 c6 5.de5+/– d5 (5...de5 6.Qd8 Kd8 7.Be5 Bb4 8.c3+=) 6.a3 Nh6 (6...b5 7.Bd4+/–) 7.c4 b6 (7...Be6 8.cd5 Qd5 9.Qd5 cd5 10.Nc3+/–) 8.cd5+– Qd5 (8...cd5!? 9.Nf3 Nc6+–) 9.Qd5 cd5 10.Nc3 Be6 (10...Bb7 11.Rd1+–) 11.Rd1 Nd7 (11...b5 12.Nd5 Bd5 13.Rd5+–) 12.Nd5 Bd5 13.Rd5 0–0–0? (13...b5+–) 14.Ba6 Kb8 (14...Kc7 15.Nf3 Nb8 16.Bc4+–) 15.Bb5 Kc7 16.Nf3 (16.Ne2 Be7+–) 16...Be7 17.Bd7 (better is 17.Ke2!? Nf8 18.Rc1 Kb8 19.Rd8 Bd8+–) 17...Rd7 18.Rd7 (18.e4 Rhd8 19.Rd7 Rd7+–) 18...Kd7 19.e6! (19.e6 fe6 20.Bg7+–) 1–0. Wall,Bill – Smoothie, internet, 2002.

4.d4 Nc6 5.d5 Nb4 (5...Nce7!?=) 6.a3+/– Nd5 7.Qd5 h5 (7...Nf6 8.Qd1+/–) 8.Bc4 Nh6 9.Qd2 c6 10.Bd3 d5 (better is 10...Qg5!? 11.f4 Qh4 12.Kd1 Bg4 13.Kc1 ef4 14.ef4 0–0–0+/–) 11.Be5+– Ng4 (11...h4 12.Bf4+–) 12.Bb2 c5 (12...Nf6 13.Nf3+–) 13.Nf3 Rh6 (13...Qb6 14.Qc3+–) 14.0–0 Qd6 15.Nc3 (15.h3 Nf6+–) 15...Rf6 (15...Be6 16.Rad1+–) 16.h3 Ne5 (16...Rf3 17.hg4 Rf6 18.Nd5+–) 17.Ne5 Qe5 18.Nd5! Qb2 (18...Qd5 19.Bb5) 19.Nc7 Kd8 20.Na8 Bh3 (20...Bd6+–) 21.gh3 Rg6 (21...Bd6 22.Qa5 Ke8 23.Nc7 Kd7+–) 22.Bg6 Kc8 23.Bf5 Kb8 24.Rab1 1–0. market (2250) – bornagain805, GameColony.com, 2002.

4.d4 Qe7 5.de5 de5 6.b5 c6 7.b6 Nd7–/+ 8.Nf3 f6 9.Bd3 e4–/+ 10.Be4? Nb6?? 11.Qd3+= Nh6 12.0–0?? f5–+ 13.Bf5 Nf5 14.Ne5 Nd7?? 15.Qf5+= Nf6 16.Qf3 Qc5 17.Qe2 Bd6 18.Qc4 Qc4 19.Nc4 Be7? 20.Nb6+– Rb8 21.Rd1?? Bf5 22.c4 0–0 23.Nc3 Bc5 24.Nba4 Be7+= 25.Rd2 b5–/+ 26.cb5 ab5 27.Rad1 ba4–+ 28.Ne2?? a3 29.Ba1 Bg6 30.Nd4? Rbc8 31.Ne6 Rfe8 32.Be5 Bf5 33.Nc7 Rf8 34.Rc1 c5 35.Nb5 c4 36.Bd6 Rfd8 37.Rcd1?? Bd6 38.Nd6 Bg4 39.Nc8=+ Rc8 40.Rd8 Rd8 41.Rd8 Kf7 42.Ra8 c3 43.Ra3 c2 44.Rc3 Bd1 45.Kf1 Nd5–/+ 46.Rc5 Nb4 47.a4? Nd3–+ 48.Rc3 c1Q (48...c1Q 49.Rc1 Nc1–+) 0–1. gtate (1985) – sammyo (1875), net–chess.com, 2004.

4.d4 Be7 5.de5 de5 6.Qd8 Kd8 (6...Bd8 7.Be5 Nf6 8.a3+=) 7.a3 (7.Be5 Bb4 8.c3 Bf8+=) 7...Nc6 (7...f6 8.Bc4+/–) 8.c4 (8.Nd2 Bf6+/–) 8...Be6 9.b5 ab5 10.cb5 Na5 11.Be5 f6 12.Bc3 Nc4 (12...Nb3!? 13.Ra2 Kc8+=) 13.Ne2 Nh6 (13...Ra4 14.Nd4 Bd5 15.Bd3+/–) 14.Nd4 Bd5 15.e4 Be4?? (better is 15...Bf7+/–) 16.Bc4+– Bb1 (16...Nf5 17.Ne6 Kd7 18.Nd2+–) 17.Rb1 Ra3 18.Bb2 Ra4 19.Bb3 Ra5 20.Bc3 Ra8 21.Ne6 Kc8 22.Ng7 Rg8 (22...Rd8 23.Ke2+–) 23.Be6 Kb8 24.Bg8 Ng8 25.Ke2 Ra2 26.Rb2 Ra3 27.Rc1 Nh6 28.Ne8 Nf5 29.g4 Nd6 30.Bf6 Bf6 (30...Ne8 31.Be7 Ra4 32.Rd1+–) 31.Nf6 h6 32.h4 Ra5 33.g5 hg5 34.hg5 Nb5 35.Rd2 Nd6 36.Nd7 Kc8 (36...Ka7 37.g6 Ne8 38.f4+–) 37.Rd6 Rg5 38.Nb6 Kb8 39.Rd8 Ka7 40.Nd5 Re5 41.Kd3 b6 (41...Re6+–) 42.Rc7 Ka6 43.Ra8 Kb5 44.Nc3 Kb4 45.Rc4 Kb3 46.Raa4 Ra5 47.Rcb4 1–0. Trkn – guest582, ICC, 2004.

4.d4 f6 5.Bd3 Nc6 (5...Be6 6.a3=) 6.Qh5+= Ke7 7.a3 Qd7 (7...Be6 8.Ne2+=) 8.d5+/– (worse is 8.Bh7 Kd8 9.de5 g6 10.Qg6 Qh7 11.Qh7 Rh7 12.ef6 Bf5=) 8...Nd8 9.Bh7 (9.Nf3 f5 10.Nh4 Nh6+/–) 9...Qg4 (9...f5!? 10.Qg5 Nf6+=) 10.Qg4+/– Bg4 11.Bd3 g5 (11...Ke8 12.c4+/–) 12.Nd2 Nh6 (12...c6 13.f3 Bh5 14.c4+–) 13.c4 b6 (13...a5 14.h3 Nhf7 15.Ne2+–) 14.Ne2 a5 (14...Nhf7 15.Rc1+–) 15.0–0 (15.h3 Bc8+–) 15...ab4 (15...Bg7 16.Ng3+–) 16.ab4 Ra1 17.Ra1 Ndf7 (17...Bd7 18.Ra7 c5 19.Ng3+–) 18.Ra7 Kd7 19.Nc3 Bg7 20.Nb5 (20.Bc2 Rc8+–) 20...Rc8 21.Ne4 (21.f3 Bf5 22.Bf5 Nf5+–) 21...f5 22.Nd2 e4?? (better is 22...Bh5+–) 23.Bg7 ed3 24.Bd4 f4 (24...Rb8 25.Nc7 Kc8 26.Ne6+–) 25.ef4 gf4 26.Bb6 Nf5 (26...Ke7 27.Nc7 Kf6 28.Bd4 Kg6 29.b5+–) 27.Nc7 Ne5 28.Ne6 (28.Ne4 Ke7 29.Ne6 Nd7+–) 28...Ke8 29.Ne4 Nc4 (29...Nd7 30.Bc7 Be2+–) 30.Nf6 1–0. Wall,Bill – Rios,Edy, internet, 2004.

4.Be2 Nf6 5.h3 Be7 6.Nc3 d5 7.a3 b5 8.d3 Bb7 9.Bf3 0–0 10.Nce2 e4 11.de4 de4 12.Bg4 Ng4 13.Qd8 Rd8 14.hg4 Bd5 15.0–0–0 (15.0–0–0 Nc6 16.Nc3=+). Beau – pbv1, Live Game Caissa's Web, 2005.

4.Nf3 b5 5.c4 Bd7 (5...e4 6.Nd4 bc4 7.Bc4=) 6.Nc3 Nc6 (6...c6 7.a3=) 7.Qb3 (7.a3 bc4 8.Bc4 Nf6+/–) 7...a5 (7...Be6 8.d4 ed4 9.Nd4 Nd4 10.ed4+=) 8.a3 (8.cb5 Be6 9.Bc4 Bc4 10.Qc4 Nb4+/–) 8...a4 (8...ab4!? 9.ab4 Ra1 10.Ba1 bc4 11.Bc4 Nh6+=) 9.Qc2+/– Na7 (9...bc4!? 10.Bc4 Be7+/–) 10.cb5+– Rb8 (10...Qb8 11.d4 f6 12.Nd5+–) 11.Qa4 Nf6 (11...Ra8 12.Qc2 Nf6+–) 12.Qa7 (better is 12.Bc4 Nc8 13.Qb3+–) 12...d5?? (better is 12...Ra8 13.Qb7 Rb8 14.Qb8 Qb8+/–) 13.Ne5+– Ne4 (13...Ra8 14.Qd4 Bd6 15.Nd5 Nd5 16.Qd5+–) 14.Ne4 de4 15.Nc6 (better is 15.Nd7 Kd7 16.Qd4 Kc8 17.Qe4 Qd7+–) 15...Bc6 16.bc6 Ra8 17.Qd4 Be7 (17...Qd4 18.Bd4 h5 19.d3+–) 18.Qg7 Rf8 19.Qh7 Bb4 (19...Qd5 20.Bg7 Rd8 21.Rd1 Qc6 22.g4+–) 20.Qe4 (better is 20.ab4!? Ra1 21.Ba1 Qd5+–) 20...Be7 21.Be2 (21.Bc4 Qd6+–) 21...Rb8 (21...Qd6 22.Be5 Qg6 23.Qg6 fg6 24.Bd3+–) 22.Bf6 (better is 22.Bg7 Rg8 23.Qh7 Rg7 24.Qg7+–) 22...Rb2 (22...Ra8+–) 23.0–0 (better is 23.Bb2 Rg8 24.Qh7+–) 23...Rd2 24.Bf3 (24.Rfd1 Rg8 25.Rd2 Qd6 26.Rd6 Rg2 27.Kg2 Kf8 28.Qe7 Kg8 29.Bd3 cd6 30.Qe8) 24...Rd6 25.Qe7 (better is 25.Rad1 Re6 26.Rd8 Bd8+–) 25...Qe7 26.Be7 Ke7 27.Rfb1 Rfd8 (27...Rd2 28.Rb7 Kd6 29.a4+–) 28.h3 (28.Rb7 Rc8+–) 28...f5 (28...Rd2 29.Rb7 Kd6 30.Kf1+–) 29.Rb7 1–0. DEFFM – GuestGCMQ, freechess.org, 2016.

4.Nf3 Be6 5.c4 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.Nf3 a6).

4.Nf3 f6 5.d4 Nh6 6.Nc3 Be7 7.Bc4 b5 8.Bb3 Bg4 9.a4 ba4 10.Ba4 (worse is 10.Na4 e4 11.h3 Bh5=) 10...c6 11.h3 Bf3 12.Qf3 (12.gf3?! d5 13.de5 Bb4=) 12...0–0 13.d5 Kh8? (better is 13...Qb6 14.Ba3 c5 15.bc5 Qa5+/–) 14.dc6+– Ra7 15.Nd5 Qc8 16.Ra3 Nc6? (16...Bd8+–) 17.Rc3 Nf5 18.Bc6 Nh4 19.Qh5 Ng2 20.Kd2 g5 (20...Qb8 21.Rg1 Ne3 22.fe3+–) 21.Ne7 Re7 22.Bg2 Qb8 23.Ba3 Rc7 24.Rc7 Qc7 25.Bd5 Rc8 26.c4 a5 27.b5 a4 (27...Rf8 28.h4 g4 29.Qg4+–) 28.h4 Qa5 29.Kd3 f5 (29...e4 30.Ke4 Qc3 31.hg5 Qc2 32.Kf3 Qf5 33.Ke2 Qc2 34.Kf1 Qd3 35.Kg2 Rg8 36.Bb2 Qf1 37.Kf1 Kg7 38.Bf6 Kf8 39.Qf7) 30.Bd6 (30.hg5 Qc3 31.Kc3 Rc4 32.Kc4 Kg7 33.Qh7 Kf8 34.Qf7) 30...e4 (30...Qc3 31.Kc3 Rc4 32.Kc4 Kg7 33.Be5 Kf8 34.Qf7) 31.Kc2 1–0. pierred (2800) – bmitrica (2190), net–chess.com, 2011.

4.h3 g6 5.Be2 Bg7 6.d4 e4 7.Nd2 d5 8.c4 c6 9.cd5 Qd5 10.Bc4 Qf5 11.g4 Qd7 12.Ne4 b5 13.Nc5 Qe7 14.Bb3 Nf6 15.d5 0–0 16.Nf3 cd5? 17.Bd5?? Rd8? 18.e4?? Ra7?? 19.Qb3?? Nd5 20.Bg7 Kg7 21.0–0 Nf4 22.Rad1? Nh3 23.Kg2 Nf4 24.Kg3 Qc7 25.Qc3 f6 26.e5 Ne2 27.Kh4 Nc3 28.Rc1 Ne2 29.Ne6 Be6 30.Rc7 Rc7 31.Re1 Nf4 32.ef6 Kf6 33.Re5 Nd7 34.g5 Ke7 35.Re4 Rc4 36.Rc4 Bc4 37.Kg4 Ne2 38.a3 Be6 39.Kh4 Nb6 40.Ne1 Rd4 41.f4 Rf4 0–1. willi_weizenkeim – janaj, playchess.de, 2003.

4.Qh5 Nc6 5.a3 Nf6 6.Qg5 h6 7.Qh4 Bf5 8.Bd3 Bd3 9.cd3 Be7 10.Qg3 Nh5 11.Qg4 g6 12.Nh3 Bg5 13.Ng5 Qg5 14.Qg5 hg5 15.0–0 0–0–0 16.Nc3 Nf6 17.e4 Rh7 18.Nd5 Nd5–+ 19.ed5 Ne7 20.d4 f6 21.de5 fe5 22.d4 Rdh8 23.h3 g4 24.de5= gh3? 25.g3?? h2 26.Kh1 Nd5 27.ed6= Re8 28.dc7 Ree7 29.Rfe1 Rc7 30.Rac1 Rc1= 31.Rc1 Kd7 32.Kg2 h1Q 33.Rh1 Rh1 34.Kh1 b5 35.Kg2 Kd6 36.Kf3 Ke6 37.Ke4 Ne7 38.f4 Nf5 39.g4 Nd6 40.Kd4 Kf7 41.Bc1 Kf6 42.Kc5+– Nc4? 43.Kd5 Nb6? 44.Ke4?? Nc4 45.g5 Kf7 46.f5 Nd6+= 47.Ke5 Nf5 48.Kd5 Ng7 49.Kc6 Ne6? 50.Kb6 Nd4 51.Ka6 Ke6 52.Ka5 Nb3 53.Kb5 Nc1 54.a4 Nb3?? 55.Kc6 Kf5?? 56.b5 Nd4 57.Kc5 Ne6 58.Kb4 Nc7?? 59.b6+– Nd5 60.Kc5 Nb6 61.Kb6 Kg5 62.a5 Kf5 63.a6 g5 64.a7 g4 65.a8Q Kf4 66.Qg2 g3 67.Kc5 Kg4 68.Kd4 Kf4 69.Kd3 Kg4 70.Ke3 Kh4 71.Kf3 Kg5+– 72.Qg3 Kf5 73.Qg4 Ke5 74.Ke3 Kd5 75.Qe4 Kc5+– 76.Kd3 Kd6 77.Kc4 Kd7 78.Kc5 Kc7 79.Qe6 Kb7 80.Qc6 Kb8 81.Qd7 Ka8 82.Kb6 Kb8 83.Qb7# 1–0. Familyfork – KarenMarx, Live Game Caissa's Web, 2004.

4.a4 b6

5.b5 a5 6.Be2 Bb7 7.d3?? (7.Nf3 Nf6=) 7...g6?? (better is 7...Bg2 8.Bf3 Bh1 9.Bh1 Ra7–+) 8.Bf3 Bf3 9.Qf3 (worse is 9.gf3 Nf6=) 9...Ra7 10.Ne2 Nd7 11.0–0 Bg7 12.Nf4 (better is 12.e4+=) 12...e4? (better is 12...Ne7!? 13.Ra2 0–0=) 13.Qe4+– Be5 14.d4 Ngf6 15.Qf3 Rg8?? (better is 15...Bf4 16.Qf4 Qe7+–) 16.de5 de5 17.Nd5 1–0. GuestCFBT – GuestQSCY, freechess.org, 2017.

5.Nf3 Bb7 6.Be2 Nf6 7.0–0 Be7 8.d3 0–0 9.Nbd2 Nc6 10.b5 ab5 11.ab5 Na7 12.c4 e4 (12...Re8 13.d4 ed4 14.Nd4+=) 13.de4+/– Ne4 14.Ne4 Be4 15.Bd3 d5 16.Be4 de4 17.Nd4 Bf6 18.Qc2 (18.Qg4 Qe8+/–) 18...Re8 19.Rfd1 (better is 19.Ra7 Ra7 20.Nc6+/–) 19...Qe7?? (19...Qc8 20.Bc3+=) 20.Ba3 (better is 20.Ra7 Ra7 21.Nc6+–) 20...Qe5= 21.Bb2 Qh5 (21...Qe7 22.Ra7 Ra7 23.Nc6+–) 22.Ne2 Bb2 23.Qb2 c5? (23...Rad8 24.Qc2 Rd1 25.Rd1+=) 24.Nf4 (better is 24.Rd7 Nb5 25.Ra8 (25.Qb5?? Ra1 26.Qb1 Rb1 27.Nc1 Rc1 28.Rd1 Rd1) 25...Ra8 26.cb5+–) 24...Qe5?? (24...Qg4 25.Qd2+/–) 25.Qd2 (better is 25.Qe5 Re5 26.Ra7+–) 25...Kh8 (better is 25...Qb8!?+/–) 26.Qd7+– Re7? (26...Qe7 27.Qe7 Re7+–) 27.Qd2 (27.Qd2 Ree8 28.Ra6+–) 1–0. GuestJSYL – GuestHTLR, freechess.org, 2017.

4.a4 c6

5.c4 Bd7 6.b5 ab5 7.cb5 cb5 8.ab5 Ra1 9.Ba1 Qa5 10.Nc3 Nf6 11.Nf3 Be7 12.Be2 0–0 13.0–0 Rc8 14.Qb3 Be6 15.Qb2 Nbd7 16.Ng5 Nc5 (16...Bf5 17.f4 Bg6 18.Nf3=) 17.Ne6 Ne6 18.Bf3 Nd8 (18...Qc7=) 19.Nd5 (better is 19.d4!?+=) 19...Nd5+= 20.Bd5 Rc5 21.e4 Rb5 22.Qc2 Rc5 23.Bc3 Qc7 24.Ra1 g5 (24...Qd7 25.Qb3=) 25.Qb3+= Kg7 26.h4 (26.Ra7 Qc8+=) 26...h6 (26...gh4 27.Bb2+=) 27.Ra7 b7 seems the pivot of the position (better is 27.hg5 Bg5 28.Ra7=) 27...Nc6?? (better is 27...gh4 28.Kf1 Qd7+=) 28.Rb7+– Qd8 29.hg5 (29.Qa4 Nd4 30.Bd4 ed4 31.Qd4 Kg8 32.hg5 hg5+–) 29...hg5 30.Bf7 Na5?? (better is 30...Nd4 31.Bd4 Rc1 32.Kh2 Qh8 33.Qh3 Qh3 34.Kh3 Kf7+–) 31.Qe6 1–0. GuestXCSC – twoexpsix, freechess.org, 2017.

5.c4 Bf5 6.d4=.

5.c4 Nf6 6.b5 (6.d4 d5 7.de5 Bb4 8.Bc3 Bc3 9.Nc3 Ne4 10.Ne4 de4 11.Qd8 Kd8=) 6...c5 (6...ab5 7.ab5 Ra1 8.Ba1 cb5 9.cb5+=) 7.Nc3 (7.d4 Nbd7=) 7...a5 (7...Be7 8.d4+=) 8.Be2 b6 (8...Bf5 9.d3=) 9.d3 Bb7 (9...Be7 10.Bf3 Ra7 11.Nge2+=) 10.e4 (10.Bf3 Bf3 11.Qf3 Ra7+=) 10...g6 (10...Be7 11.Nf3=) 11.Nf3+= Bg7 12.0–0 0–0 13.h3 (13.Qd2 Nfd7+=) 13...Bc8 (13...Nfd7 14.Nd5+=) 14.Nh2 (14.Qd2 Nbd7+=) 14...Be6 15.Bc1 Nbd7 16.Bg5 h6 17.Bh4 (17.Be3 Re8+=) 17...g5 18.Bg3 Re8 19.Ng4 Ng4 20.Bg4 Nf6 21.Be6 fe6 22.Bh2 (22.h4 Nd7 23.Qh5 Rf8+=) 22...Rf8= 23.Ra2 (23.Qf3 Rf7=) 23...Qe8 24.g4 (24.Bg3 Qg6=) 24...Nh7 (24...Qg6 25.Bg3+=) 25.Ne2 (25.Qe2 Qg6+=) 25...Qf7 (25...Qg6 26.Ng3+=) 26.Ng3 (26.Bg3 Ra7+=) 26...Qf3 (26...Nf6 27.Qf3+=) 27.Qf3 Rf3 28.Rd2 Raf8 29.Kg2 R3f7 30.Nh5 Nf6 31.Ng7 (31.Nf6 Rf6 32.Bg3 Kh7=) 31...Kg7+= 32.Bg3 h5 33.gh5 Nh5 34.Bh2 (34.Rh1 Rf3+=) 34...Rf3 (34...Kg6 35.Rg1+=) 35.Re1 Kg6 36.Re3 (36.Bg3 R3f7+=) 36...R3f6 (36...R3f7 37.Re1+=) 37.f3 (37.Rde2 R6f7+=) 37...Nf4 (better is 37...R6f7+=) 38.Kg3? (better is 38.Bf4 Rf4 39.Kg3+=) 38...Rh8–+ 39.Kf2 Nh3 (39...Rh3 40.Bg1–+) 40.Kf1 (40.Kg2 Kf7–+) 40...Nf4 (40...g4 41.Kg2–+) 41.Kg1 (better is 41.Bf4!? Rf4 42.Rg2–/+) 41...Rh3–+ 42.Bf4 (42.Rf2 g4 43.Bf4 Rf4–+) 42...ef4 43.Ree2 0–1. Schuchardt,E – Roskosch,Erich, Hessen–ch Seniors, 1992.

5.f4 Nf6=.

4.a4 Nc6

5.b5 Nb4 6.c3 Nd5 7.ba6 ba6 8.Qf3 Ngf6 9.c4 Nb4 10.Qd1 Bb7 11.d3 Nh5?? (better is 11...Rb8+=) 12.Bc3+– (12.Qh5?! Nd3 13.Bd3 Bg2+=) 12...Nd3 13.Qd3 (worse is 13.Bd3 Bg2 14.Qh5 Bh1+=) 13...Qg5 14.Ne2 e4 (14...Be7+–) 15.Qc2 Be7 16.Nd2 0–0 17.Ng3 (17.Rb1!? Rfb8+–) 17...Ng3 18.hg3 (18.fg3?! Qe3 19.Be2 Rab8+=) 18...f5 19.Nb3 Bf6 20.Bf6 Qf6 21.Rb1 White prepares c5 21...Bc6 (21...Rfb8 22.c5+–) 22.Nd4 Bd7 23.c5 d5 24.c6 Be6 25.Ne6 (25.Qc5!? Qf7+–) 25...Qe6 26.Rb7 Qd6 27.Be2 Rfb8 28.Rb8 Rb8 29.0–0 Rb6 30.Rc1 Qb4 31.Qc5 Qc5 32.Rc5 Rb1 (32...Kf7 33.Rd5 Kf6 34.Ra5+–) 33.Bf1 Ra1 (33...Rd1 34.Rd5! Rd5 35.Bc4+–) 34.Ra5 (34.Rd5 Ra4 35.Rf5 a5+–) 34...g5 (34...Kf7 35.Rd5 (35.Ra6?! Ke6+–) 35...Ra4 36.Rd7 Ke6 37.Rc7+–) 35.Ra6 h5 (35...Rc1 36.Ra8 Kf7 37.Rc8 Rc6 38.a5+–) 36.Ra7 h4 (36...Kf7 37.Rc7 Ke6 38.Rh7+–) 37.Rc7 Ra4 (37...hg3 38.Ra7 gf2 39.Kf2+–) 38.Rd7 hg3 (38...Ra1 39.c7 Rc1 40.gh4 gh4 41.Rd8 Kf7+–) 39.c7 Ra8 40.Rd8 Rd8 41.cd8Q Kh7 42.Qg5 gf2 43.Kf2 f4 44.Qf4 Kg6 45.g4 d4 46.Qe4 Kg5 1–0. forsetinn – zeewesp, gameknot.com, 2013.

5.b5 ab5

6.ab5 Na7 7.c4 (7.d4 e4 8.d5+= Nf6 9.Bf6 Qf6+=) 7...d5? (7...Nf6 8.Qc2= g6 9.e4 Bg7=) 8.Qh5 (8.Be5!? Ne7 9.Nf3+/–) 8...Bd6+= 9.c5 (9.f4 Nf6 10.Qg5 h6 11.Qg7 Rh7+/–) 9...Nf6 10.Qg5 0–0?? (better is 10...Bc5 11.Be5 Rg8+=) 11.cd6+– h6 (11...cd6 12.f4 h6+–) 12.dc7 Qc7 (12...hg5?? 13.cd8Q Rd8 14.b6+–) 13.Qe5 Qe5 (13...Qd8 14.Qf4 Ne4 15.Ne2+–) 14.Be5 Nd7 15.Bd4 b6 16.Nc3 Bb7 17.Be2 Rfe8 18.Nf3 Re6 19.0–0 Nf6 (19...Nc5 20.Bc5 bc5 21.Rfb1+–) 20.Ra3 Bc8 (20...Nc8 21.Ra8 Ba8+–) 21.Bf6 (21.Rfa1 Re7 22.Bb6 Bg4+–) 21...Rf6 (21...gf6 22.Rfa1 Re7 23.Nd4+–) 22.Nd5 Rd6 23.Ne7 Kh7 24.Ra7! Rb8 (24...Ra7 25.Nc8) 25.Nc8 Rc8 26.Rf7 Kg8 27.Ne5 (better is 27.Ra7 Rc2+–) 27...Rc5 (27...Rd2 28.Bc4 Kh7 29.Bd3 Kg8 30.Rb7+–) 28.d4 Rc2 29.Bd3 Rc8 30.Rd7 Rf6 31.Rb7 1–0. Trkn – Superfish, itsyourturn.com, 2000.

6.ab5 Ra1

7.Ba1 Na7 8.c4 c6 9.Qa4 (9.d4 Bf5 (9...cb5 10.cb5 Bf5 11.Nd2 Qa5 12.de5 de5) 10.Nd2 cb5 11.e4 Bd7 12.de5 de5) 9...Qb6 10.Nc3 (10.d4 Bf5 11.Nd2 e4+= (11...f6 12.Ngf3 Ne7) 12.d5 Ke7) 10...Bd7 (10...Nf6 11.Be2= Be7 12.Nf3 cb5) 11.Nf3 Nf6 12.Be2 Be7 13.0–0 0–0 14.Bb2 (14.d4 cb5 15.Qb3 e4+=) 14...e4 (14...Ra8 15.bc6 bc6 16.Rb1=) 15.Nd4 (15.Ng5 d5 16.cd5 cd5 17.Nd5 Nd5 18.Qe4 Bg5 19.Qd5 Qd8 20.Qb7 Bb5 21.Bb5 Qb8=) 15...c5 (15...Ra8!?=) 16.Nc2+= Be6 (16...Ra8 17.f3+=) 17.Na3 (17.f3 ef3 18.Bf3 Nd7+=) 17...h6 (17...Nc6 18.bc6 Qb2 19.Rb1+/–) 18.Qc2 Bf5 19.d3 ed3 20.Bd3 Be6 21.Na4 Qd8 22.Rd1 d5? (better is 22...b6!?+/–) 23.cd5 (better is 23.Bf6!? Bf6 24.cd5 Bg4+–) 23...Nd5 24.Nc5 Qc7 (24...Bc5 25.Qc5 Qb8 26.Qd4+–) 25.Ne6 (25.Bh7 Kh8 26.Ne6 fe6 27.Qc7 Nc7+–) 25...Qc2 26.Nc2 fe6 27.Bc4 (better is 27.Nd4 Bf6 28.Rd2+–) 27...Rd8? (better is 27...Rc8 28.Bd5 ed5+/–) 28.Nd4 Kf7 29.Ne6! Ke6 30.e4 Bf6 31.Bf6 (31.Ba3!? Be5+–) 31...Kf6 32.Rd5 (32.ed5 Nc8+–) 32...Rd5 33.Bd5 b6 34.Bc6 Ke5 35.f3 Nc6 36.bc6 Kd6 37.Kf2 Kc6 38.Ke2 Kc5 39.e5 Kd5 (39...b5 40.f4+–) 40.f4 g5 (40...b5 41.Kd3+–) 41.g3 1–0. mtr – tikbalang, Caissa's Web, 2001.

7.Ba1 Na7 8.c4 Bd7 9.Nc3 Be7 (9...Nf6 10.d4=) 10.Nf3+= Nf6 11.Be2 (11.d4 ed4 12.Qd4 b6+=) 11...0–0 (11...c6 12.0–0=) 12.Qc2 (12.d4 e4 13.Nd2 d5+=) 12...c6= 13.0–0 cb5 14.cb5 Nc8 (14...Qa5 15.Ng5 h6 16.Nd5 hg5 17.Ne7 Kh8 18.Rb1 Nb5 19.Qb3+=) 15.Bb2 (15.d4 Qc7+/–) 15...Nb6+= 16.h3 (16.d4 Qb8+=) 16...Qc7 (16...Qb8 17.d4=) 17.Rc1 Rc8 18.Qb1 (18.Qd1 Qd8=) 18...Qb8= 19.d3 (19.d4 Be6=) 19...h6 (19...d5 20.Qa1=) 20.e4 Rc5 Exerts pressure on the isolated pawn (20...Re8 21.Qa2+=) 21.Ba3 (21.d4 ed4 22.Nd4 Qc8+=) 21...Rc7 22.Ne5 Qc8 (better is 22...Bh3!? 23.Nc4 Nc4 24.dc4 Be6+=) 23.Nd7 (23.Nc4 Nc4 24.dc4 b6+–) 23...Nbd7 (23...Qd7 24.Bb4+/–) 24.Na4 (24.Bb2 Nb6+–) 24...b6 (24...Rc1 25.Qc1 Qd8 26.Nc3+–) 25.Rc7 Qc7 26.Qc1 Qa7 27.Qc8 (27.Nc3 Qa8+–) 27...Kh7 (better is 27...Bf8 28.Qa6 Qc7+/–) 28.Qc4 (28.Qc2 Nc5 29.Bc5 dc5+–) 28...Qa5?? (better is 28...d5 29.Qb3 Ba3 30.Qa3 Nc5=) 29.Qb4+– Qa7 (29...Qa8 30.Bb2+–) 30.Nc3 Bf8 31.Bb2 (31.Qa4 Qb7+–) 31...d5 32.Qb3 (better is 32.Qa4 Qa4 33.Na4 de4 34.Bf6 Nf6 35.Nb6+–) 32...de4? (32...Nc5 33.Qc2 d4 34.Nb1+/–) 33.Ne4 (better is 33.Qf7!? e3 34.fe3 Qa5+–) 33...Ne4 34.de4 Nc5 35.Qf3 (35.Qd5 Qe7+–) 35...f6 (35...Qa2 36.Bd4+–) 36.e5 (36.Bc4 Qd7+–) 36...Qa2 37.Qf5 (37.Bd4 fe5 38.Be5 Be7+–) 37...g6+/– 38.Qc2 fe5 39.Bc4 Qa4 (39...Qa7 40.Be5 Bg7 41.Bg7 Qg7 42.Qd2+/–) 40.Be5?? (better is 40.Qa4 Na4 41.Be5+–) 40...Qc2–+ 1–0. DEFFM – GuestWVJZ, freechess.org, 2016.

7.Ba1 Na7 8.c4 Bd7 9.d4 e4+=.

7.Ba1 Na7 8.c4 Bd7 9.Nf3 Nc8 (9...Nf6 10.d4 e4 11.Nfd2=) 10.Nc3 (10.d4 e4 11.Nfd2 d5+=) 10...Nf6 (10...f5 11.Be2+=) 11.d3 (11.d4 e4 12.Nd2 d5+=) 11...Bg4 (11...c6 12.Be2=) 12.h3 (12.Be2 Nb6+=) 12...Bd7 13.Be2 g6 (13...Nb6 14.0–0+=) 14.0–0 (14.d4 e4 15.Nd2 d5+/–) 14...Bg7+= 15.Qc2 0–0 16.d4 (16.Bb2 Qe7+=) 16...ed4 17.Nd4 b6 (17...Nb6 18.Rd1+=) 18.Bf3 Ne7 19.Bb2 Qc8 (19...Be6 20.Nce2+/–) 20.Ra1 Bh3? (better is 20...Be6!?+/–) 21.Ra8 (21.gh3 Qh3 22.Ra7 Rc8+–) 21...Qd7 22.Rf8 Bf8 (22...Kf8 23.gh3 Qh3 24.Qa4+–) 23.gh3 Qh3 24.Bg2 (24.Nd5 Nfd5 25.cd5 Qd7+–) 24...Qg4 25.Qe2 (25.Kf1 h6+–) 25...Qg5 (25...Qe2 26.Nce2 Bg7 27.Nf4+–) 26.Nf3 (26.Qf3 h6+–) 26...Qc5 (26...Qg4 27.Nd2 Qe2 28.Ne2+–) 27.Nd1 (27.Na4 Qf5+–) 27...Bg7 28.Bf6 (28.Bd4 Qf5+–) 28...Bf6 29.Nd4 Qg5 (29...Bd4 30.ed4 Combination) 30.Qf3 (30.Qd3 h6+–) 30...Bd4+/– 31.ed4 Nf5 32.c5?? (better is 32.Qe4+–) 32...Nd4–/+ 33.Qe3 (33.Qa8 Kg7–/+) 33...Qe3 (33...Qc5 34.Bc6–/+) 34.fe3 Nf5?? (better is 34...Nb5 35.Bf1 Na3–/+) 35.cb6+/– cb6 36.Bc6 (36.Kf2 h5+/–) 36...Kf8 37.Kf2 (37.e4 Nd4+/–) 37...Ke7 (37...Ne7 38.Nb2+/–) 38.Kf3 (38.Nc3!?+/–) 38...h5 (38...Kd8 39.Bd5 f6 40.Be6+/–) 39.Nc3+/– Kd8 40.Nd5 (40.Bd5 Nh6+/–) 40...Ne7+= 41.Nb6 (better is 41.Kg3+=) 41...Kc7?? (better is 41...Nc6 42.bc6 Kc7 43.Nd5 Kc6+=) 42.Nd5+– Nd5 43.Bd5 Kb6 (43...f6 44.Bf7 g5 45.Bh5 Kb6+–) 44.Bc6 (44.Bf7!? Kb5 45.Bg6 h4+–) 44...Kc5 (44...f6 45.Be8 h4 46.Bg6 Kb5 47.Kg4+/–) 45.Kf4 (better is 45.Be8!? h4 46.Bf7 Kb5 47.Kg4+–) 45...f6+/– 46.e4 (46.Be8 g5 47.Kf5 h4+/–) 46...h4 (46...f5 47.ef5 gf5 48.Kf5 d5=) 47.Be8 (47.Kg4 g5+–) 47...g5 (better is 47...f5!?=) 48.Kg4 Kb6 49.Bd7 Kc7 50.Be8 Kb6 51.Kf3 (51.Bc6 Kc7+/–) 51...Kc5 52.Bd7 (52.Bc6 Kb6+/–) 52...d5+= 53.ed5 Kd5 54.b6 Kd6 55.b7 Kc7 56.Bc6 f5 (56...Kc6 57.b8Q Combination) 57.Bd5 h3 58.Bc6 g4 (58...Kc6 59.b8Q Combination) 59.Kg3 Kb8 60.Bd5 Kc7 61.Bc6 Kb8 (61...Kc6 62.b8Q Combination) 62.Bd5 (62.Bh1 Ka7=) 62...Kc7+= 63.Bc6 Kb8 (63...Kc6 64.b8Q Combination) 64.Bd5 ½–½. DEFFM – josejoaf, freechess.org, 2016.

7.Ba1 Nb4 8.c3 Nd5 9.c4 Nb6 10.Nf3 Be7 11.Qc1 (11.Qc2 Nf6=) 11...Be6 (11...Nf6 12.Qc2=) 12.Be2 Bf6 (12...Nf6 13.0–0=) 13.Qc2 e4 (13...Qa8!? 14.Bb2 Qa4 15.Qa4 Na4=) 14.Nd4+= Bf5? (14...Qe7 15.Qe4 d5 16.cd5 Bd5 17.Qe7 Ne7 18.Rg1+=) 15.Nc3?? (better is 15.Nf5!? Ba1 16.Qe4 Ne7 17.Ne7 Qe7 18.Qb7+–) 15...Bg6? (better is 15...Bd4!? 16.ed4 Nf6=) 16.Ne4+/– d5 17.Nf6 (better is 17.cd5 Nd5 18.0–0+–) 17...Qf6? (better is 17...Nf6 18.Nf5 Bf5 19.Qf5 Nc4 20.Bf6 Qf6 21.Qc8 Qd8 22.Qb7 0–0+/–) 18.Qa2+– dc4?? (18...Qe7 19.Qa7 dc4 20.Qb7+–) 19.0–0 (better is 19.Nf3 Qf5 20.Bg7 Qb5 21.Bh8+–) 19...Bd3 (19...Ne7!?+–) 20.Bd3 cd3 21.Nf3 Qf5?? (better is 21...Qg6+–) 22.Bg7 Ne7 23.Bh8 f6 (23...Qb5 24.Rb1 Qd5 25.Qa7+–) 24.Nd4 Qg6 (24...Qe4 25.Rc1 Qg4 26.Bf6+–) 25.Ne6 Ned5 (25...c6 26.Rb1 cb5 27.Qa5+–) 26.Nd4 (26.Qa7 Qf7 27.Qb8 Ke7+–) 26...Qf7 (26...Kf7 27.Re1 Qe4 28.Rc1+–) 27.Nf5 (27.Qa7!? Qg8+–) 27...Qg6 (27...Qg6 28.e4 Nf4+–). GuestDPNV – GuestVTVJ, freechess.org, 2017.

7.Ba1 Nb4 8.c3 Nd5 9.c4= Ndf6 10.d4 e4 11.d5 Nd7 12.Ne2 Nc5.

7.Ba1 Nb4 8.e4 Nf6 (better is 8...Be6!?= 9.d4 d5 10.c3 Na2 11.de5 de4 12.Qd8 Kd8 13.Ne2) 9.c3+/– Na2 (9...Ne4 A) worse is 10.cb4 Qh4 11.Qf3 (11.Qe2 Nf2 12.g3 Qb4) 11...Nf2= 12.g3 Qb4; B) 10.d3 Nd3 11.Bd3+= Nc5 12.Be2 Qg5) 10.Qc2 (better is 10.Qa4!?+– d5 11.Qa2 Ne4 12.d3 Nf6) 10...Be6+= 11.Nf3 (11.Qa4 Nc1 12.c4 Ne4=) 11...Qa8 (11...Be7 12.Ng5 Qc8) 12.Ng5 (12.Bb2 b6+= (12...h6+=)) 12...Nb4= 13.cb4 Qa1 14.Ne6 (14.Bc4 Ne4 15.Ne6 (worse is 15.Be6 Ng5 16.Bd5 Qd4 17.Bb7 Ne6=) 15...fe6 16.Be6+/– (16.Qe4?! d5 17.Bd5 ed5=)) 14...fe6+= 15.Bc4 (15.b6 c6+=) 15...d5 16.Bb3 (16.Ba2 Bb4 17.0–0 Qd4 (17...Ne4 18.Nc3 Bc3 19.Ra1 Ba1 20.Qc7+=) 18.ed5 Nd5 19.Bd5 ed5 20.Qc7 0–0+=) 16...Qd4–/+ 17.0–0 Qb6 (17...Ne4 18.Qc7 Qb4+= (18...Nd2? 19.Nd2 Qd2 20.Qe5+–)) 18.ed5= ed5 19.Re1 (19.Nc3 c6 20.Qf5 Kf7+=) 19...Bd6+= 20.Nc3 0–0 (better is 20...Qd4+=) 21.Ne4?? (better is 21.Nd5 Nd5 22.Bd5 Kh8 23.Bf3 Qb5 24.Qc3=) 21...Ne4–+ 22.Qe4 (22.Bd5 Kh8 23.d4 Nf2 24.Bf3–+) 22...Qf2 23.Kh1 Kh8 (23...Qf1 24.Rf1 Rf1) 24.Bd5?? (24.Qe3 Qe3 25.de3 (25.Re3?? Rf1) 25...Bb4 26.Rd1–+) 24...Rf4 (24...Qf1! 25.Rf1 Rf1) 25.Qe2?? (better is 25.Qe3 Qe3 26.de3 Rb4 27.Bb7 Rb5 28.Bc6–/+) 25...Qe2–+ 0–1. mtr – larryfine, Caissa's Web, 2001.

7.Ba1 Nb8 8.c4 (8.d4 Nd7=) 8...Be6 (8...Nf6 9.d4 e4 10.Nc3=) 9.Nc3 (9.d4 Nd7=) 9...Nf6 (9...Nd7 10.d4=) 10.Nf3 Be7 11.Be2 0–0 12.h3 (12.0–0 Nbd7=) 12...e4 (12...Qd7 13.0–0=) 13.Nd4 (13.Ng5 d5=) 13...Qd7 (13...Nbd7 14.0–0=) 14.Ne6 (14.Qc2 d5 15.cd5 Bd5 16.Nd5 Qd5 17.Qc7 Bd6+/–) 14...Qe6 (14...fe6 15.0–0+=) 15.0–0 (15.d3 Nbd7+=) 15...d5 (15...c6!?=) 16.cd5+/– Nd5 17.f3 (17.Nd5 Qd5 18.Qc2 Nd7+/–) 17...Nc3+= 18.Bc3 (worse is 18.dc3 Bc5+=) 18...Bf6 (18...ef3!? 19.Bf3 c6+=) 19.Bf6+/– Qf6 20.fe4 Qg6 (20...Qg5 21.Bc4+/–) 21.Bf3 (21.Qc2 c6+/–) 21...c6 (21...Qg5 22.Qb3+/–) 22.Qb3 Nd7 (22...Rd8 23.d4 Rd7 24.e5+–) 23.bc6 (23.d4 Re8+–) 23...bc6+/– 24.Qc3 (24.Bg4 Rb8 25.Qc3 Nf6+–) 24...Re8 25.Ra1 (better is 25.d4+/–) 25...Ne5?? (better is 25...c5+/–) 26.Qe5!+– Re5 (26...Re5 27.Ra8) 27.Ra8 Re8 28.Re8 1–0. DEFFM – shuhad, freechess.org, 2016.

7.Ba1 Nce7 8.d4 e4 =.

7.Ba1 Nce7 8.Nf3 Ng6 9.Be2 Nf6 10.h3 Be7 11.c4 b6 12.0–0 Bb7 13.Ng5 h6 14.Nf3= Qa8 15.Nc3 0–0 16.d4 e4 17.Nd2+= Bd8? 18.d5+– Re8 19.Qc2 Qc8 20.Nce4 Ne4 21.Ne4 Qf5? 22.Bd3 Ne5? 23.Be5 Qe5+/– 24.f4 Qe7 25.Rf3 Qh4 26.Rg3?? Bc8?? 27.Kh2 Bf6 28.Nf6 Qf6 29.Rf3 Bd7 30.g3 Ra8 31.Rf2 Qa1 32.Rf1 Qa3 33.Rb1 Qc5 34.Re1 Ra3 35.e4?? Qb4?? 36.Re2 Rc3 37.Qd2 Qa3 38.Re3 Rc1 39.g4 Ra1 40.e5?? Ra2–/+ 41.Bc2 Rc2! 42.Qc2? Qe3–+ 0–1. vik – SNAKE3, Caissa's Web live, 2001.

7.Ba1 Nce7 8.h3 Nf6 9.Nf3 h6 (9...Be6 10.d4 e4 11.Ng5+=) 10.Be2 Ng6 11.0–0 Be7 12.d4 (12.Nc3 d5=) 12...e4 13.Nh2 (13.Nfd2 Be6=) 13...d5+= 14.Ng4 (14.c4 0–0+=) 14...Ng4 15.Bg4 Bg4 16.Qg4 Qd7 17.Qd7 (17.Qh5 Qb5 18.Nc3 Qc4 19.Qd5 Qd5 20.Nd5 c6+=) 17...Kd7 18.Nd2 (18.f3 f5+=) 18...f5 (18...Ra8 19.c4 Bb4 20.Nb3 dc4 21.Nc5 Bc5 22.dc5–/+) 19.Bb2 (19.Rb1 Ra8–/+) 19...Ra8–/+ 20.Ra1 Ra1 21.Ba1 Nh8 (21...Bb4 22.Nb3–/+) 22.f3 (22.Bb2 Bb4 23.Nb3 Nf7+=) 22...Bg5 (22...Bb4 23.Nb3+=) 23.Kf2 f4 24.ef4 Bf4 25.Nb3 e3 26.Ke2 b6 (26...Nf7 27.Nc5 Kc8 28.g3 Bg3 29.Ke3–/+) 27.Bb2 Nf7 (27...Ng6 28.g3 Bg3 29.Ke3–/+) 28.Bc1 Nd6 29.Be3 Be3 (29...g5 30.h4=) 30.Ke3 Nb5 (30...g6 31.g3=) 31.h4 (31.g3 c6=) ½–½. Ruhle,Ernst Albrecht – Passecker,J, Vienna op–F, 1996.

4.a4 Bd7

5.a5 Nf6 6.Be2 Be7 7.Nf3 h6 8.0–0 b5 9.e4 Ne4 10.d3 Ng5 11.Nbd2 Nc6 12.Ne1 Nb4 13.Bf3 Nf3 14.Ndf3 Nd5 15.c4 bc4 16.dc4 Nf4 17.Qc2 0–0 18.Rd1 Bc6 19.Be5 Ng6 20.Bc3 Qe8 21.g3? Ba4–+ 22.Qd3 Bd1 23.Qd1 Qc6 24.Qe2 Rab8 25.Nd4 Qc5 26.Nec2 d5 27.Ne3 dc4 28.Qc4 Qc4 29.Nc4 Bf6 30.Ne2 Bc3 31.Nc3 Rb3 32.Ne4 Re8 33.Ned2 Rd3 34.Rd1 Ne5 35.Ne3 Red8 (36.Nef1 Nf3 37.Nf3 Rd1–+) 0–1. valpa – schnitzly, playchess.de, 2003.

5.b5 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 cb5 9.cb5 Qb6 10.Qa4 Na6 11.d4 Qc7 12.Bc4?? (better is 12.Bc3 ed4 13.Bd4+=) 12...d5!–+ 13.Bd5 (better is 13.Be2 Qc1 14.Qd1 Bb4 15.Kf1 Qd1 16.Bd1 Bb5 17.Be2 Be2 18.Ne2–+) 13...Qc1 14.Qd1 Bb4 15.Bc3 Bc3 16.Nc3 Qc3 17.Qd2 Qd2 (better is 17...Qa1 18.Ke2 Bb5 19.Kf3 Nf6–+) 18.Kd2–/+ Bb5 19.Bb7 ed4 20.ed4 Nf6 21.Nf3 0–0 22.Rd1 (22.Rb1 Nc7–+) 22...Rb8 23.Ba6 Ba6 24.Rc1 (24.Ra1 Bc4–+) 24...h6 25.Rc5? (25.Rc2–+) 25...Ne4 26.Ke3 Nc5 27.dc5 Bb7 28.Kd4 Bf3 29.gf3 Kf8 30.c6 Rc8 (30...Ke7 31.c7 Rc8 32.Ke5–+) 31.Kd5 (31.Kc5 Ke7 32.f4 Ra8–+) 31...Ke7 32.f4 Ra8 33.Kc5 Kd8 34.Kd6 Kc8 35.f5 Ra2 36.f4 Rh2 37.f6 (37.Ke7 f6 38.Kf7 Rg2–+) 37...gf6 0–1. Bittner,H – Hubrig, corr, 1986.

5.b5 ab5 6.ab5 Ra1 7.Ba1 Nf6 =.

5.c4 a5 6.b5 b6 7.Nc3 c5 (7...Nf6 8.Nf3 Be7 9.d4 ed4 10.Qd4+=) 8.Nf3 (8.Be2 Nf6 9.Nf3 Be7 10.d4+=) 8...Bf5 (8...Nf6 9.Be2+= Be7 10.d4+=) 9.d4 (9.Ne5 de5 10.Qf3 Nd7 11.Qf5 Bd6+–) 9...e4 (9...ed4 10.ed4 Ra7 11.dc5 dc5 12.Qd8 Kd8 13.0–0–0 Kc8 14.Nd5+–; 9...Nd7 10.Bd3+/–) 10.Nd2 (better is 10.dc5!? dc5 11.Qd8 Kd8 12.Nh4+–) 10...Nf6 11.Be2 Be7 (11...cd4 12.ed4 Qd7 13.Ba3+=) 12.0–0 (12.d5 0–0+/–) 12...Nbd7 (12...cd4 13.ed4 0–0 14.f3 ef3 15.Bf3+/–) 13.f3 (13.d5 Ne5+/–) 13...ef3 14.Bf3 Ra7 15.Qe2 0–0 16.e4 Bg6 17.e5 de5 18.d5 (18.de5!? Ne5 19.Qe5 Qd2 20.Nd5+/–) 18...Bd6 19.Nce4 Ne4 20.Ne4 Be4 21.Be4 Nf6 (21...g6 22.g4=) 22.Bd3= Re8 23.Bc2 h6 24.Ra3 Nh7 25.Bh7 Kh7 26.Rg3 f6 27.Qe4 Kh8 28.Bc1 Rf8 (28...Rd7 29.Rh3 Bf8 30.Re3=) 29.Rf5 (29.Rh3!? Kg8 30.Qg6+=) 29...Qe8 30.Rh3 Qg6 31.Rg3 Qh7 32.Qg4 Rg8 33.Rh5 Bf8 34.Rgh3 (34.Kh1 Rf7=) 34...Rf7 (34...Qc2 35.Ba3–/+) 35.d6 (better is 35.Rf5=) 35...f5?? (35...Qc2!? 36.Be3 Qb1 (36...Bd6 37.Bh6 gh6 38.Rh6 Rh7 39.Rh7 Qh7 40.Qf5 Qh3 41.Qh3 Kg7 42.Qd7 Kg6 43.Qd6+–) 37.Kf2 Qa2 38.Ke1 Qa1 (38...Qa4 39.Qg6 Qa1 40.Ke2 Qa2 41.Bd2 Qc4 42.Ke1+–; 38...Bd6 39.Bh6 Qe2 40.Ke2 g6 41.Bf8 gh5 42.Qh5 Rh7 43.Qh7) 39.Ke2 Qa4+= (39...Bd6 40.Bh6 Qd1 41.Kd1 g6 42.Bf8 gh5 43.Qh5 Rh7 44.Qh7)) 36.Qf3 (better is 36.Qe2!? Qg6 37.Qe5+=) 36...Qg6 (36...f4 37.Qd5 Rf6 A) worse is 38.Re5 Rd6 (38...Bd6?! 39.Re1+=) 39.Qf3 Qc2–/+; B) 38.Qe5 Rd6 39.Bf4 Rd1 40.Kf2 Qc2 41.Qe2 Qe2 42.Ke2+=) 37.Qd5= Rd7 (37...Bd6?? 38.Bh6 gh6 39.Rh6 Rh7 40.Rh7 Qh7 41.Rh7 Kh7 42.Qd6+–) 38.Qe5 Rd6?? (better is 38...Kh7=) 39.Rh6 Qh6 40.Bh6 1–0. Schwab – Sander, tt, 1988.

5.c4 b5 6.ab5 c5?! 7.bc5 dc5 8.Nf3 (8.Be5 Be6 9.Qf3 Ra7+–) 8...e4 9.Ng1 (better is 9.Ne5!? Nf6 10.d3 ed3+–) 9...Nf6 10.Nc3 Be6 (10...Bc8 11.Nge2+–) 11.Qc2 Bf5 (11...Nbd7 12.ba6 Qb6 13.Nb5+–) 12.Nge2 1–0. GuestKTQQ – GuestWTQK, freechess.org, 2017.

5.c4 Nc6 6.b5 ab5 7.ab5 Nce7 8.Nc3 c6 (8...Ra1 9.Qa1 Ng6 10.Qa7=) 9.Ra8+= Qa8 10.Nf3 Ng6 11.Be2 f5 12.0–0 Nf6 Black plans e4 13.Qc2 Be7 14.Ra1 Qc8 15.d4 e4 16.Nd2 0–0 17.f3 d5 18.cd5 Nd5 (18...cd5 19.f4=) 19.fe4 (19.Qb3 Kh8 20.Nd5 cd5+/–) 19...Nb4 (better is 19...Ne3 20.Qb1 cb5 21.Qa2 Kh8+=) 20.Qb3+/– White prepares d5 20...Be6 21.d5 Bf7 22.ef5 (22.Ba3 c5+/–) 22...Ne5 (22...Qf5!? 23.Rf1 Qd7+=) 23.bc6 bc6 24.e4 cd5 25.Nd5 Bc5 (better is 25...Nd5!? 26.Qg3 Bf6 27.Be5 Nf4 28.Qf4 Qc5 29.Qf2 Qe5+/–) 26.Kh1+– Qb8 (26...Bd5 27.ed5 Qf5 28.d6 Nf7 29.Qc3+–) 27.Qg3 (27.Qg3 Nbd3 28.Be5 (28.Bd3?! Qb2 29.Rd1 Bh5+/–) 28...Qe5 29.Qe5 (29.Qd3?! Qa1 30.Bf1 Bd6=; 29.Bd3? Qa1 30.Bb1 Bd5 31.ed5 Bb4–+) 29...Ne5 30.Ra5+–) 1–0. GuestPSTG – GuestYYWM, freechess.org, 2017.

5.c4 Be7 6.Nf3 Nf6 7.Nc3 a5 (7...0–0!?=) 8.b5+= c5 (8...Bf5 9.Be2=) 9.d3 (9.Qc2 h6+/–) 9...Bg4 (9...0–0 10.Be2+=) 10.Be2 Nbd7 11.h3 Bh5 (11...Be6 12.Ng5+/–) 12.0–0 (12.g4 Bg6+–) 12...0–0 13.Qd2 (13.g4 Bg6+/–) 13...Bg6 (13...Nb6!?+=) 14.Nh4+/– Nb6 15.Ng6 hg6 16.Qc2 d5 (16...Qd7 17.Ne4+/–) 17.cd5+– Nbd5 18.Nd5 Nd5 19.Be5 Qb6 20.Qb3 Rad8 21.d4 cd4 (21...Bf6 22.Rfd1+–) 22.Bd4 Bc5 23.Bc5 Qc5 24.Bf3 b6?? (better is 24...Nc3 25.Bb7 Rd3+–) 25.Rac1 Qd6 (25...Qb4 26.Bd5 Qb3 27.Bb3+–) 26.Rfd1 Qb4 27.Bd5 Qe7 (27...Rd7 28.Qa2 Qe7 29.Rc6+–) 28.Rc6 Qg5 (28...Kh7 29.Rb6 Rd7 30.e4+–) 29.Rb6 Qe5 (29...Rd7+–) 30.Bf7 Kh7 31.Bg6 Kh8 32.Rc1 (better is 32.Rd8 Rd8 33.Re6 Qb8+–) 32...Rd2 33.Qc4 (better is 33.Rc4 Qg5 34.Rg4 Qh6+–) 33...Rdf2 (33...Qg5 34.Rc2 Rd1 35.Kh2 Qe5 36.g3 Qg5+–) 34.Qh4 1–0. Lein,Marina (1925) – Khalturina,Tatiana (1815), Seniors Russian Championship Women, 2011.

5.c4 Nf6 6.Nf3 e4 (6...Be7 7.Nc3+=) 7.Nd4 c5 8.Nc2 cb4 (8...Nc6 9.b5 Ne5 10.d4 ed3 11.Bd3 Be6; 8...d5 9.cd5 cb4 10.d3 Bf5 11.Bf6 Qf6; 8...Bg4 9.f3 ef3 10.gf3 Ne4 11.fg4 Qh4) 9.Nb4 Qb6 (9...Nc6 10.Nd5 Nd5 11.cd5= Ne5) 10.Bf6+= Qb4 (10...gf6? 11.Nd5 Qc6 12.Qc2+–) 11.Bc3 Qb6 (11...Qc5 12.d3 d5 13.Qb3 dc4 14.Qb7+= (worse is 14.Qc4 Qc4 15.dc4 Bf5=; worse is 14.dc4 Bc6=)) 12.d3 Bf5 (12...Qc6 13.de4 Qe4 14.Qd5+=) 13.de4 (13.Nd2 ed3 14.e4 Be6+=) 13...Be4 14.Nd2 Bc6 15.Qg4 (15.a5 Qc7+=) 15...Bd7 (15...Nd7 16.Be2+= (16.Bg7? Rg8–+)) 16.Qg3 (16.Qe4 Be6+/–) 16...Nc6 17.Be2 (17.Bg7? Rg8–+) 17...Ne5 18.Be5 de5 19.Qe5 Qe6 20.Qd5 (20.Qe6 Be6 21.Rb1 0–0–0+/–) 20...Bc6 21.Qe6 fe6 22.Bf3 Bb4 23.Bc6 bc6 24.Rd1 (24.Rb1 Rb8 25.Ke2 Ke7+/–) 24...Rd8 (24...Rb8 25.Ke2+/–) 25.Ke2 0–0 (25...Ke7 26.Ne4+/–) 26.f4 (26.Nf3 Bc3+–) 26...Bc3 (26...e5!? 27.fe5 Bd2 28.Rd2 Rf2 29.Kf2 Rd2 30.Kf3 Ra2+/–) 27.Ne4+– Bb4 28.Ng5 Rd1 (28...Rde8 29.Nf3+–) 29.Rd1 (29.Kd1?! e5 30.Ne6 Rf6+=) 29...Re8 30.Nf3 Ba5 (30...a5 31.Rd7+–) 31.Ne5 (31.Rd6 Rc8+–) 31...c5 32.Rd6 Rb8 (32...Bc7 33.Ra6 Be5 34.fe5+–) 33.Ra6 Rb2 (33...Bc3 34.Nd7 Rb2 35.Kf3+–) 34.Kf3 Bc7 35.Re6 (35.Nd7 Rb4+–) 35...Rb8 (35...Be5 36.Re5 (36.fe5?! Rb4+–) 36...Rb4 37.Rc5 Ra4 38.Rc7+–) 36.Ke4 (36.Nd7 Rb4 37.Rc6 Bd8 38.Rc5 Kf7 39.Ne5 Ke8+–) 36...g6 (36...Be5 37.Re5 Rb4 38.Rc5 Ra4 39.Rc7+–) 37.Nd3 Bb6 38.Kd5 Kf7 (38...Ba5 39.Nc5 Rd8 40.Kc6+–) 39.Ne5 Kf8 (39...Kg8+–) 40.Nd7 (40.Nd7 Kf7 41.Nb8+–) 1–0. mtrold1 – PulveRIZER, internet live, 2001.

5.c4 Nf6 6.Nf3 Be7 7.Be2 Be6 8.d4 ed4 (8...e4 9.Nfd2 d5 10.c5= Nbd7 11.0–0 0–0 12.Nc3=) 9.Nd4= 0–0 10.Ne6 (10.0–0 a5 11.b5 Nbd7 12.f4+=) 10...fe6 11.0–0 Nbd7 (11...Nc6 12.b5 Nb4 13.Nd2=; 11...d5 12.Bg4=) 12.Nc3 (12.a5 Qe8+=) 12...h6 (12...a5 13.b5=) 13.Bf3 Rb8 14.Qc2 Ne5 15.Be2 c5 16.b5 Qb6 17.Ne4 a5 18.Be5 de5 19.Rfd1 Rbd8 20.Bf3 Qc7 21.Qc3 (21.Nf6 Bf6 22.Rd8 Rd8+/–) 21...b6 22.Qc2 Nh7 23.Rd8 Rd8 24.Rd1 Rf8 (24...Rd1 25.Qd1 Nf6 26.Qd3+/–) 25.Ng3 (25.Bg4 Qc8+–) 25...Ng5 26.Bc6 Bf6? (better is 26...Rd8+/–) 27.Rd7+– Qc8 28.Nh5 Rf7 (28...e4 29.f4 Nh7 30.Qe4+–) 29.Rf7 (better is 29.Nf6 gf6 30.Qg6 Kf8 31.Qh6 Kg8 32.Rf7 Nf7 33.Qf6+–) 29...Nf7 30.Nf6 gf6 31.Qg6 Kf8 32.Qf6 Qd8 33.Qd8 Nd8 34.Ba8 (34.Kf1!? Nf7 35.Ke2 Ke7+–) 34...Nf7+/– 35.Bf3 Nd6 36.Be2 Kf7 37.f3 Kf6 38.e4 Kg5 39.g3 h5 40.h4 Kg6 41.Kg2 Kf6 42.Kh3 Nf7 43.g4 Kg6 44.Kg3 Nh6 45.g5 Nf7 46.Kh3 (46.Bf1!? Nd6+–) 46...Kg7 47.Kg3 Nh8?? (47...Kg6 48.Bf1 Nd6+–) 48.f4+– ef4 49.Kf4 Ng6 50.Kg3 Ne5 51.Kf4 (51.Bh5!? Nc4 52.Bg4 e5+–) 51...Ng6+/– 52.Ke3 (better is 52.Kf3+/–) 52...Kf8?? (better is 52...Nh4 53.Bh5 Ng2 54.Kf3 Ne1 55.Ke2 Ng2+=) 53.Bh5+– Nh4 (53...Ne5 54.Be2+–) 54.Kf4 (54.Kf2 Kg7 55.Kg3 Ng6 56.Bg6 Kg6+–) 54...Ke7 (54...Ng2 55.Ke5 Ne3 56.Be2+–) 55.Ke5 (better is 55.Kg3 Nf5 56.ef5 ef5 57.Kf4+–) 55...Ng2 56.g6 (better is 56.Bg4 Nh4 57.Be6 Nf3 58.Kd5 Ng5 59.Bf5+–) 56...Kf8?? (56...Ne1 57.Be2 Ng2+–) 57.Kd6 (57.Kf6 Ke8 58.g7 Kd8 59.g8Q Kc7 60.Be8 Nf4 61.Qf7 Kb8 62.Bc6 Nd5 63.cd5 Kc8 64.Qd7 Kb8 65.Qb7) 57...Ne3 (57...Nf4 58.Bg4 Ng6 59.Be6+–) 58.Be2 (worse is 58.Ke6 Kg7 59.Be2 Kg6+–) 58...Nc2 (58...Ng2 59.Kc6 Nf4 60.Kb6 Ng6 61.Kc5+–) 59.Kc7 Kg7 60.Kb6 Kg6 61.Kc5 Kf6 62.b6 Nb4 63.Kb5 (better is 63.b7 Na6 64.Kd6 Nb8+–) 63...Ke7 64.b7 Kd7 65.b8Q e5 66.Qe5 1–0. Trkn – Russ163, itsyourturn.com, 2000.

5.Nf3 g6 6.Be2 Bg7 7.0–0 Ne7 (7...Nf6 8.d4+=) 8.c4 0–0 9.Qb3 c5 (better is 9...Bg4!?=) 10.bc5+/– Bc6 11.cd6 Qd6 12.Rd1 Nd7 13.d4 e4 The passed pawn on d4 will quickly become a dangerous weapon 14.Nfd2 Nf6 15.d5 Bd7 16.Nc3 (16.Qb7 Rfb8 17.c5 Qc5 (17...Rb7 18.cd6 Rb2 19.de7=) 18.Ne4 Ne4 (18...Rb7?! 19.Nc5 Rb2 20.Bf3–/+) 19.Qd7 Bb2–+) 16...Bg4? (better is 16...Bf5+–) 17.Nce4 Ne4 18.Ne4 Qd7 19.Bg4 (19.Bg7 Kg7 20.Qb2 f6+–) 19...Qg4 20.Nf6 Bf6 21.Bf6 Nf5 (21...Qd7 22.Rab1 Rfb8 23.c5+–) 22.h3 (better is 22.f3 Qh5 23.g4 Qh3 24.gf5 Qf3+–) 22...Qe4 23.Qd3 (23.c5!? Rac8 24.Rac1 Rc7+–) 23...Qd3 24.Rd3 Rac8 (24...Rfc8 25.Rc1+–) 25.Rc1 (25.d6 Rc6 26.c5 Nh6+–) 25...Nd6 26.Be7 Nc4 27.Bf8 Kf8 28.d6 (better is 28.a5!? b5 29.ab6 Nb6 30.Rc8 Nc8+–) 28...b5 29.ab5 ab5 30.d7 Rd8 31.Rb1 Ke7 32.Rb5 Nd6 33.Rbd5 Rd7 34.e4 Rd8 (34...f6 35.Kf1+–) 35.e5 Nb7 36.Rd8 Nd8 37.f4 Nb7 (37...Ne6 38.g3+–) 38.Kf2 Nc5 39.Rd4 h6 40.g4 g5 (40...f6 41.Ke3+–) 41.f5 f6 (41...Ke8 42.Rd5 Nd7 43.Ke3+–) 42.e6 Ke8 43.Kg3 Nb3 44.Rd7 Nc5 45.Rh7 Ne4 46.Kg2 Kf8 (46...h5 47.gh5 Nd6 48.h6 Nf5 49.Rh8 Ke7 50.h7+–) 47.Rh6 Kg7 (47...Ke7 48.Rh7 Ke8 49.Kf3+–) 48.Rg6 Kf8 49.Kf3 Nd2 50.Ke3 Nc4 51.Kd4 Nd6 (51...Nd2 52.Rf6 Ke8 53.Rf7+–) 52.Rf6 Ke7 53.Rg6 Nb5 54.Kc5 (better is 54.Ke5 Na3+–) 54...Nc7 (54...Nc3 55.Rg7 Kf8 56.Rf7 Ke8 57.f6+–) 55.Rg7 Kd8 56.Rc7! Kc7 57.Kd5 Kd8 58.Ke5 Ke7 59.f6 Kf8 60.Kd6 White prepares the advance e7 60...Ke8 61.f7 Kf8 62.Kd7 Kg7 63.e7 Kf7 64.e8Q Kf6 65.Qe6 Kg7 66.Ke7 Kh7 (66...Kh8 67.Kf6 Kh7 68.Qd7 Kh6 69.Qg7) 67.Kf7 Kh8 68.Qh6 1–0. Sellmer,Dirk – Stoecker,Ronald, Schleswig Holstein–ch, 1991.

4.a4 Be6

5.c4 Nd7 6.Nc3 Ngf6 7.d4 (7.Nf3 a5 8.b5 Be7 9.Be2 Nb6=) 7...ed4 8.ed4 (8.Qd4 c5 9.bc5 Nc5+=) 8...d5 9.c5 c6 (9...Qe7 10.Bd3=; 9...Bg4=) 10.Nf3 Be7 11.Be2 0–0 12.0–0 h6 13.b5 a5 14.b6 Nh7 15.Nd2 f5 16.f4 (16.Re1 Ng5+=) 16...Nc5= 17.Ba3 (better is 17.dc5 Bc5 18.Kh1+=) 17...Nd7 18.Be7 Qe7 19.Rb1 Qd8 20.Qb3 Nhf6 21.Nd1 Ne4 22.Ne4 fe4 23.Ne3 g6 24.Bg4 Bg4 25.Ng4 Kg7 26.Ne5 (26.Qh3 h5 27.Ne5 Ne5 28.fe5 Rf1 29.Kf1–/+) 26...Nf6 (better is 26...Ra6–/+) 27.Qg3= Qe8 28.h4 (better is 28.f5!? g5 29.Ng6=) 28...Nh5–/+ 29.Qg4 (29.Qe3!?–/+) 29...Rf5–+ 30.g3 Nf6 (30...Qe6!? 31.Qh3–+) 31.Qh3 h5 32.g4? (better is 32.Qg2–/+) 32...hg4–+ 33.Ng4 Nh5 (33...Ng4 34.Qg4 Qf7 35.Kg2–+) 34.Qe3 (better is 34.Ne3 Rf4 35.Rf4 Nf4 36.Qh2–+) 34...Qe7 35.Rb2 (35.Qe1–+) 35...Qh4 36.Rg2 Raf8 37.Qf2 Qe7 (37...Qf2 38.Rff2 (38.Nf2?? Nf4 39.Ne4 de4 40.Rf4 Rf4–+) 38...Nf4 39.Rg3–+) 38.Ne5 (38.Ne3 Rf4 39.Qd2 Rf1 40.Nf1 Nf4–+) 38...Re5! 39.de5 (39.de5 Nf4; 39.fe5 Rf2) 39...Nf4 40.Qf4 Rf4 41.Rf4 Qe5 42.Rgf2 (42.Rfg4 Qd4 43.Kf1 Qf6 44.Ke2 c5–+) 42...Qe7 43.Kf1 e3 44.Re2 (44.Rh2 d4! 45.Rfh4 Qf7 46.Ke1 Qb3–+) 44...c5 (44...d4!? 45.Rf3 Qe4 46.Ree3 de3 47.Ke2 Qa4 48.Re3 Qb5 49.Rd3–+) 45.Rf3 (45.Rh2 d4 46.Rfh4 Qf7 47.Ke1 Qc4–+) 45...d4 46.Rb2 (46.Rg3–+) 46...Qe4 47.Rg3 d3 48.Rg1 e2 49.Ke1 Qd4 0–1. Zimmer – Loetzbeier, (year?).

5.c4 Nd7 6.Nf3 f6 7.d4 Bg4 8.Be2 e4 9.Nfd2 Be2 10.Qe2 Qe7 (10...f5!?=) 11.Nc3 c6 (11...f5!?+/–) 12.Nce4 d5 13.Nc5 Nb6 14.0–0 Nh6 15.b5 ab5 (15...Qf7 16.cd5 Bc5 17.dc5 Nd5 18.Nc4+–) 16.ab5 Qc7 (16...Rb8 17.e4 de4 18.Ba3+– (18.Qe4?! Qe4 19.Nce4 cb5+–)) 17.Ra8 Na8 18.Ne6 Qc8 (18...Qd7 19.Nf8 Kf8 20.bc6 bc6 21.Ra1+–) 19.Nf8 Rf8 (19...Kf8 20.Ra1 Nf5 21.bc6 bc6 22.cd5 cd5 23.e4+–) 20.cd5 cd5 21.Qh5 Rf7 22.Qd5 Nc7 23.Qc5 Rd7 (23...Qf5 24.Qf5 Nf5+–) 24.b6 (24.b6 Qd8 25.bc7 Rc7 26.Qb4+–) 1–0. Cadet,Yves – Fournier,Frederic (2090), Match, 2012.

4.a4 Bf5

5.c4 Nc6+= 6.b5 ab5 (6...Nb4 7.d3+=) 7.ab5 Ra1 8.Ba1 Nce7 (8...Nb4 9.d3+=) 9.Nc3 (9.d4 Nf6=) 9...Nf6 10.Nf3 Be6 (10...Ng6 11.Be2=) 11.Be2+= Ng6 12.0–0 (12.Ng5 Bf5=) 12...Be7 13.d3 (13.Ng5 Bc8=) 13...Kf8 (13...0–0 14.Ng5=) 14.h3 (14.Ng5 Bc8+=) 14...Ke8 (14...Kg8 15.d4+=) 15.Re1 h6 16.Bb2 Qd7 17.Qc2 Bd8 (17...Bf5 18.Ra1+/–) 18.Ra1 (18.d4 Be7+/–) 18...Ke7 (18...Qc8 19.d4+/–) 19.Ne4 (19.d4 ed4 20.Nd4 Ne5+–) 19...Ne4 20.de4 Re8 21.Rd1 (21.c5 Kf8+/–) 21...Kf8 22.Ne5 Ne5 23.Be5 Qe7 (23...Bh3 24.Bg3 (24.gh3?! Re5 25.Bg4 Qe7=) 24...Bg4 25.e5+/–) 24.Bb2 (24.Bf4 b6+–) 24...Bd7 (24...Qg5 25.Kf1+/–) 25.Qc3 (25.e5!? Qg5 26.ed6 Bh3+–) 25...Qg5+/– 26.Rd5 Qg6 27.g4 (27.Bh5 Qh7 28.e5 Be6+/–) 27...h5? (better is 27...Bf6 28.Qc2 Re4+=) 28.Rh5+– Re4? (better is 28...Bf6 29.Qa3 Bb2 30.Qb2 Re4+–) 29.Rh8 Ke7 30.f3 (better is 30.Bd3 Bf5 31.Be4 Be4 32.Qg7 Qg7 33.Bg7+–) 30...Re6 31.f4 (better is 31.Qg7 Qg7 32.Bg7 Re3 33.Kf2+–) 31...f5?? (31...Qb1 32.Kf2 Qh1+–) 32.e4 (better is 32.Rg8!? Rf6 33.Qf6 Qf6 34.Bf6 gf6 35.Rg7 Ke8+–) 32...Re4 33.Bf3 (better is 33.Rg8 Qf6 34.Rg7 Ke8 35.Rg8 (35.Qf6?! Bf6 36.Bf6 Re2+–) 35...Kf7 36.Rd8 Qc3 37.Rd7 Ke6 38.Bc3 Kd7 39.Kf2 fg4 40.hg4 Rf4 41.Ke3+–) 33...Rf4 (33...Be6 34.Be4 fe4+–) 34.Qe3 Re4 35.Be4 fe4 36.Qf4 (better is 36.Rg8 Kf7 37.Rd8 Bg4 38.hg4 Qg4 39.Kf1 Qd1 40.Kf2+–) 36...Be6?? (36...Be8+–) 37.Qf8 Kd7 38.Qd8 1–0. GuestLZFS – GuestDSPJ, freechess.org, 2016.

5.Be2 Nf6 6.c4 Nbd7 7.Nc3 c6 8.Nf3 Be7 9.0–0 e4 10.Nd4 Bg6 11.d3 ed3 12.Bd3 Bd3 13.Qd3 Ne5 14.Qe2 0–0 15.Nf5 Ned7 16.a5 d5 17.Ne7 Qe7 18.c5 Ne5 19.Na4 Nc4 20.Bd4 Rae8 21.Nb6 Ne4 22.Nc4+/– dc4 23.Rfd1 c3 24.Qg4 f5 25.Qf4 g5 26.Qf3+= (26…Qe6 27.Qe2+/–) 1–0. MammaMia – Pawncross, Live Game Caissa's Web, 2004.

5.Qf3 Ne7 6.e4 Be6+=.

5.Nf3 Bg4 6.Be2 Nf6 7.0–0 g6 (7...Be7 8.Nc3=) 8.c4+= c6 9.Nc3 Bg7 10.h3 Bf3 11.Bf3 (11.gf3?! Qe7=) 11...Nbd7 12.d4 0–0 13.b5 ed4 14.Qd4 (14.ed4!? ab5 15.ab5 Ra1 16.Ba1+=) 14...Nd5= 15.Qd2 Bc3 16.Bc3 Nc3 17.Qc3 Ne5 18.e4 (18.Be2 Qf6 19.Qd4 Rfe8+=) 18...Qf6 19.Be2 c5 (19...Qf4!? 20.bc6 bc6=) 20.f4+/– Nd7 21.Qf6 Nf6 22.Bf3 Rab8 23.Rfd1 Ne8 (23...Rfe8 24.ba6 ba6 25.Rd6 Ne4 26.Ra6 Rb4+/–) 24.Rd5 White plans e5 24...a5 25.b6 Rd8 (25...f6+–) 26.Rad1 f5 (26...Ng7 27.e5+–) 27.e5 Rf7 (27...Rc8 28.ed6 Nf6 29.d7+–) 28.ed6 (28.Rc5 Rfd7 29.Rcd5 Kf8+–) 28...Rfd7 (28...Kg7 29.Rc5 Rd6 30.Rd6 Nd6 31.Rc7 (31.Ra5?! Nc4 32.Ra7 Nb6+–) 31...Rc7 32.bc7+–) 29.Rc5 Rd6 30.Rd6 Rd6 (30...Nd6 31.Rc7 Ne4 32.Rb7+–) 31.Rc8 (31.Bb7?! Rb6 32.Rb5 Rd6+–; 31.Ra5?! Rb6 32.Ra8 Kf8+–) 31...Kf8 (31...Kf7 32.c5 Rd7+–) 32.c5 Re6 (32...Rd7 33.c6 Rd6 34.c7+–) 33.Bb7 Re1 (33...Ke7 34.Bf3 Re1 35.Kh2+–) 34.Kh2 Ke7 35.Bc6 Kf7 36.Be8 Re8 37.Re8 Ke8 38.b7 Kd7 39.b8Q h6 40.Qd6 1–0. forsetinn (1720) – eakhundov (1650), gameknot.com, 2013.

4.a4 Nf6

5.b5 a5 6.Be2 b6 (6...Be7 7.Nf3=) 7.Nf3 Bb7 (7...Be7 8.0–0=) 8.0–0+= Be7 9.c4 0–0 (9...Nbd7 10.d4+=) 10.h3 (10.d4 e4 11.Nfd2 d5+=) 10...Nbd7 (10...Re8 11.d4=) 11.d4 e4 12.Nfd2 d5 13.cd5 Nd5 (13...Bb4 14.Bc4+=) 14.Ne4 Ne3 15.fe3 Be4 16.Bf3 (16.Nc3 Bb7+/–) 16...Nf6 17.Nd2 Bd3 (17...Bf3 18.Qf3 (worse is 18.gf3 Qd5+=) 18...Re8 19.Nc4+=) 18.Rf2+/– Rc8 19.Qb3 (19.Bb7 Rb8 20.Qf3 Qd6+/–) 19...Bg6 (19...Bf5 20.e4 Be6 21.Qc2+/–) 20.Bb7+/– Rb8 21.Bc6 Bb4 22.Nc4 (22.Bc3 Bc3 23.Qc3 Qe7+/–) 22...Ne4 (22...Bd6 23.Ne5 Be5 24.de5+/–) 23.Rf4+/– Nd6 (23...Ng3 24.Rg4 Nf5 25.Rf1+/–) 24.e4 (24.Ne5 Bf5+/–) 24...Nc4 25.Qc4 Kh8 (25...Qg5 26.Rf3+/–) 26.e5 (26.Raf1 Qe7+/–) 26...f6 27.Raf1 (27.e6 Qe7+/–) 27...fe5+= 28.Rf8 (28.de5 Rf4 29.Rf4 Qd1 30.Kh2 Rd8+=) 28...Bf8= 29.de5 (better is 29.Bd5!?=) 29...Bc5–/+ 30.Kh1 Bd3 31.Qf7 Bf1 32.e6? (better is 32.Qf1 Qd2 33.Qb1–+) 32...Qf8 33.Qc7 Rc8 (better is 33...Be7!? 34.Be5 Rd8 35.Qb6–+) 34.Bg7 Qg7 (better is 34...Kg8!? 35.Bf8 Rc7 36.Bc5 bc5–+) 35.Qc8–/+ Qg8 (35...Qf8 36.Qc7 Bd3 37.Qe5 Kg8 38.Bf3–/+) 36.Qd7 Qf8 37.Be4 Qe7 0–1. DEFFM – GuestTDZK, freechess.org, 2016.

5.b5 ab5 6.ab5 Ra1 7.Ba1 c5 8.c4 b6 9.d3 Be7 10.Nc3 Be6 11.Be2 d5 12.Nf3 d4 13.ed4 ed4 14.Na4 Qd6 15.h3 h6 16.Bb2 0–0 17.0–0 Nbd7 18.Re1 Qc7 19.Bf1 Ra8 20.Qc2 Qa7 21.Ra1 Qb7 22.Qe2 Ra7 23.Ne5 Ne5 24.Qe5 Nd7 25.Qe1 Qa8 26.Qd1 Bd8 27.Be2 Ne5 28.Bc1 Bf5 29.f4 Nd3 30.Bf3? (better is 30.Bd3 Bd3 31.Nb6 Bb6 32.Ra7 Qa7 33.Qd3+=) 30...Qb8–+ 31.g4 Bh7 32.Qd2 (32.Qf1 Bc7 33.f5 Bh2 34.Kh1 Qg3–+ (34...Nc1?! 35.Qc1 Bf4 36.Qd1–+)) 32...Nc1 (better is 32...Bh4!? 33.Bb2–+) 33.Qc1 f5 34.Qe1 Re7 35.Qd2 Re3 36.Bd5 Kf8 37.Nb6? (better is 37.Qh2–+) 37...Qb6 (37...Bb6 38.Ra8 Qa8 39.Ba8 Rg3 40.Kf2+/–) 38.Ra6 (38.Qg2 Qc7–+) 38...Qb8 (38...Qc7 39.Qf2 Rh3 40.b6–+) 39.Ra8 Qf4 (better is 39...Qc7 40.Qh2 Re1 41.Kf2 Rb1–+) 40.Rd8 (40.Qa5 Qg3 41.Kf1–+) 40...Ke7 41.Re8 (41.Bg2 Qg3 42.Ra8 Re1 43.Qe1 Qe1 44.Kh2 d3 45.Ra7 Kd6 46.Ra6 Ke5 47.gf5 d2 48.Re6 Kf5 49.Re1 de1Q (49...de1N?? 50.b6 Ng2 51.b7+–) 50.Bd5 Qf2 51.Kh1 Kf4 52.Bg2 Kg3 53.b6 Qg2) 41...Ke8 42.Bc6 Ke7 43.Qf2 Qf2 44.Kf2 Rh3 45.b6 (45.gf5 Bg8 46.Bg2 Rb3–+) 45...Rb3 46.Bb5 Kd6 47.b7 Kc7 48.b8Q 0–1. Bittner,H – Rohloff, corr, 1988.

5.b5 ab5 6.ab5 Ra1 7.Ba1 Bd7 8.c4 Be7 9.Nf3 0–0 10.Be2 c6 11.h3 (11.0–0 cb5 12.cb5 Qb6=) 11...Qb6 (11...e4 12.Nd4+=) 12.Nc3= Re8 (12...cb5 13.Nb5 e4 14.Nfd4=) 13.0–0 e4 14.Ng5 (14.Nd4 d5=) 14...Bf5 (14...d5 15.Na4 Qd8 16.cd5 cd5 17.Qb3–/+) 15.f3 (15.Qb1 d5 16.g4+=) 15...h6 (15...ef3 16.Nf3 d5 17.Na4=) 16.fe4 (16.Nge4 Nbd7+/–) 16...Bh3?? (better is 16...Bg6 17.Nf3 Ne4 18.Ne4 Be4+=) 17.Nh3+– (17.gh3?! hg5 18.Rf5 Qd8+/–) 1–0. DEFFM – smichet, freechess.org, 2016.

5.b5 b6 6.Be2 (6.d4 Nbd7=) 6...a5 (6...Be6 7.Nf3=) 7.Bf3 e4 (7...Ra7 8.d3=) 8.Be2 (8.Bf6 Qf6 9.Be4 Qa1 10.Ba8 Qa4+=) 8...Be7 (8...d5 9.c4+=) 9.c4 (9.d3 Bb7=) 9...c5 (9...0–0!?+=) 10.d3+= Bb7 11.de4 (11.Nc3 ed3 12.Bf3 Qc7+=) 11...Be4 (11...Ne4 12.Bf3 (worse is 12.Bg7 Rg8–+) 12...Bf6 13.Bf6 Qf6 14.Ra2=) 12.Bf3+= Bf3 13.Qf3 (13.Nf3 d5+=) 13...Nbd7 14.Nd2 (14.Na3 0–0+=) 14...0–0 15.Nh3 Ne8 (15...Ne5 16.Qe2+=) 16.Qd5 (16.0–0 Bf6 17.Bf6 Nef6+=) 16...Ne5 17.Ne4?? (17.Be5 de5 18.0–0–0+= (18.Qe5?? Bf6 19.Qd5 Ba1–+)) 17...Nc7–/+ 18.Qd1 f5 (better is 18...Nc4 19.Bc3 d5–/+) 19.Nd2? (19.Be5 de5 20.Nc3 Qe8+=) 19...Bf6?? (better is 19...Nd3 20.Ke2 Nb2–+) 20.Ra2?? (better is 20.0–0=) 20...Nd3–+ (20...Nd3 21.Kf1 Nb2–+ (21...Bb2?! 22.Nf3–+)) 0–1. GuestZJVS – GuestSTDC, freechess.org, 2016.

5.b5 Be6 6.Nf3+=.

5.c4 Nc6 6.Bc3–/+.

5.c4 Be7 6.Nf3 Nbd7 7.Be2 0–0 8.Nc3 c5 9.b5 h6 10.d3 b6 11.0–0 Bb7 12.e4 Re8 13.Nh4 Nf8 14.Nf5 Bc8 15.Ne7 Qe7 16.Bf3 Bd7 17.ba6 Ra6 18.Nb5 Bc6 19.Be2 Ng6 20.g3 Rea8 21.Qc2 h5 22.Nc3 h4 23.Nd5 (23.f4 hg3 24.hg3 ef4 25.gf4 Ne8=) 23...Bd5 (23...Nd5!? 24.cd5 Ba4–/+) 24.ed5 e4 (better is 24...Qd7!?+=) 25.Bf6+/– Qf6 26.de4 Ne5 27.f4 Nd7 28.e5 de5 29.fe5 Qe5 30.Rf4?? (better is 30.gh4 Nf6 31.Rfd1=) 30...Qa1–+ (30...Qa1 31.Kf2 hg3 32.hg3 Ra4–+) 0–1. GuestXFMN – GuestWHMS, freechess.org, 2017.

5.c4 Bf5 6.d4 ed4 (6...d5 7.c5 Bg4 8.f3+=) 7.Bd4 d5 8.Qb3 Be6 (8...Nc6 9.Bc3+=) 9.Nf3 (9.Nc3 Nc6+=) 9...Qe7 10.Bc5 Qd8 11.Bf8 Rf8 12.Be2 h6 (12...dc4 13.Bc4 Bd5 14.Nbd2+=) 13.0–0+= g5 (13...dc4 14.Bc4 Bc4 15.Qc4+=) 14.Rd1+/– c6 15.Nc3 Ke7 (15...Qe7!?+/–) 16.cd5+– Bd5 17.Nd5 cd5 18.Qc3 Nc6 19.Ne5 Qd6 20.Nc6 bc6 21.Rac1 Rfc8 22.Qc5 (better is 22.Bd3!?+–) 22...Qc5+= 23.Rc5 Ne4 24.Rc2 Kd6 (24...a5 25.f3 Nf6 26.b5 cb5 27.Rc8 Rc8 28.Bb5+=) 25.f3+= Nf6 26.e4 (26.Rc5 a5 27.Ra5 Ra5 28.ba5 c5=) 26...Ke5 (26...a5!? 27.ed5 Nd5 28.ba5 Ra5+=) 27.ed5+= Nd5 28.Rc5 (28.Rc4 Rd8+=) 28...Kf6 (28...Rcb8 29.Bc4 Rb4 30.Rc6=) 29.b5 (29.Rd4 a5 30.b5 Ke5+/–) 29...ab5 (29...Nf4 30.Rd6 Ke7 31.Rd2 cb5 32.Rc8 Rc8 33.ab5+=) 30.ab5= Nf4 31.Kf1 cb5 32.Rc8 Rc8 33.Bb5 Rc2 34.g3 Ne6 35.Be2 ½–½. Geyer,Ulf – Kaufmann,Rolf, RLPF–ch U15 Germany, 1989.

5.Be2 Bd7 6.c4 h6 7.d3 (7.d4 Be7= 8.Qb3 ed4 9.ed4 0–0 10.Nf3; 7.Nc3 Be7 8.Nf3 e4 9.Nd4 c5 10.bc5; 7.Bc3 Be7 8.Nf3 e4 9.Nd4 c5 10.Nc2) 7...c6 (7...d5 8.c5= Nc6 9.Qd2 Be7 10.Nf3) 8.Nf3+= Be7 (8...a5 9.b5 Be7 10.0–0) 9.0–0 (9.a5 b6 10.Qd2) 9...0–0 (9...a5 10.b5=) 10.Nc3 (10.a5 Be6+=) 10...Bg4 11.Nd2 (11.a5 Nbd7+=) 11...Be2 12.Qe2 (12.Ne2 Nbd7=) 12...d5 13.c5 (13.b5 Re8=) 13...b6 (13...a5 14.b5 Bc5 15.Rac1–/+) 14.Nb3 White intends a5 (14.cb6 Qb6 (worse is 14...Bb4 15.a5+=) 15.Na2 a5=) 14...bc5+= 15.bc5 Nbd7 Black prepares the advance e4 16.d4 e4 (16...Re8 17.Qd3=) 17.a5 (17.Rab1 Re8=) 17...Qb8 (17...Rb8 18.Ra3 Rb7 19.Na4=) 18.Qc2 (18.Ra3 Bd8=) 18...Ng4+= 19.g3 h5 (19...Ra7 20.Rab1+=) 20.Nd2 (20.Bc1 Bg5=) 20...h4 21.Kg2 hg3 22.hg3 Bg5 23.Nd1 Ndf6 24.Ra3 Nh5 (24...Qc7 25.Bc3+=) 25.f4 (25.Rb3 Qc7 26.Rh1=) 25...Bf6 (25...Bd8 26.Rh1 Nhf6 27.Rb3=) 26.Nf2 (better is 26.Kh3 Qc8 27.f5+/–) 26...Ne3?? (better is 26...Nf2 27.Rf2 Be7=) 27.Re3+– Bg5?? (27...Qc8+–) 28.fg5 1–0. mtr – Fogbound, Caissa's Web, 2001.

5.Ne2 Be6 6.Ng3 Be7 7.Be2 0–0 8.0–0 Nd5 9.b5 (9.Bf3 Nb4=) 9...ab5 (9...Nd7=) 10.ab5 Ra1 11.Ba1 Nd7 12.c4 N5b6 13.d3 Qa8 14.Nc3 Nc5 (14...f5 15.d4 f4 16.ef4 Rf4 17.de5 de5 18.Nd5 Bd5 19.cd5=) 15.Nge4 (15.d4 ed4 16.ed4 Nca4+/–) 15...f5 (15...Ne4 16.Ne4 f6 17.Qc2=) 16.Nc5 dc5 17.Bb2 Rd8 18.Qa1 (18.Qc2 Qc8+=) 18...Bf6 (18...Qa1 19.Ba1 e4 20.de4 fe4 21.Ne4 Bc4 22.Bc4 Nc4 23.Rc1=) 19.Qa8 (19.e4!?+=) 19...Ra8+= (worse is 19...Na8 20.Na4+/–) 20.Ra1 (20.Nd1!?+=) 20...Ra1–/+ 21.Ba1 e4! 22.de4 fe4 23.Ne4 (better is 23.f3!?–/+) 23...Ba1–+ 24.Nc5 Bc4 25.Bc4 Nc4 26.Nb7 Na3 27.Kf1 Nb5 28.Nc5 c6 29.Ke2 Nd6 30.Kd3 Kf7 31.e4 (31.f4 Nb5–+) 31...Be5 32.g3 g5 33.h3 (33.Nd7 Ke6 34.Nf8 Ke7 35.Nh7 g4–+) 33...h6 34.g4 (34.Ke3 Nc4 35.Kd3 Na3–+) 34...Ke7 35.f3 Kd8 36.Ne6 Kc8 37.Kc2 Kb7 (37...Nb5 38.Kd3–+) 38.Nc5 (38.Nf8–+) 38...Kb6?? (better is 38...Kc7–+) 39.Nd7+/– Kb5 40.Ne5 Kc5 (40...c5 41.Ng6+/–) 41.Kd3+– Kb5 42.Kd4 Kb6 (42...c5 43.Kd5 Nc8 44.Nf7+/–) 43.Nc4+– Kc7 44.e5 Nc8 (44...Nb5 45.Ke4 Kd7+–) 45.e6 Ne7 46.Ke4 Kd8 (46...c5 47.f4 gf4 48.Kf4+–) 47.Ke5 Ng8 48.Kd6 Ne7 49.Ne5?? (49.Ne3 Nc8 50.Kc6 Ke7+–) 49...Ke8?? (better is 49...Nc8 50.Kc6 Ke7+–) 50.Nc6 Nc8 51.Ke5 Ne7 (51...Nb6+–) 52.Ne7 Ke7 53.Kf5 Kf8 54.e7! Ke7 55.Kg6 Ke6 56.Kh6 1–0. Trkn – Ezy_Ryder, itsyourturn.com, 2000.

5.Ne2 Be7 6.d4 ed4 (6...Nbd7 7.Ng3 ed4 (7...0–0 8.Be2 Re8 9.0–0 ed4 10.Qd4 Ne5=) 8.Qd4 c5 9.bc5 dc5 10.Qd2 0–0=) 7.c4? (7.Nd4 c5 8.bc5 (8.Nf3 cb4+= 9.Bd3 0–0 10.0–0 Nc6+=) 8...dc5 9.Nf3 Qd1 10.Kd1 Nc6+=) 7...Bg4 (better is 7...de3 8.fe3 0–0–+) 8.Nbc3?? (8.f3 Bd7 9.Nd4 a5=) 8...0–0 (8...dc3 9.Bc3 0–0 10.f3–+) 9.Qc2?? (9.ed4!? d5 10.f3–/+) 9...Be2 (better is 9...dc3!? 10.Bc3 a5 11.ba5–+) 10.Be2? (10.Ne2 de3 11.fe3 Re8–+) 10...d5?? (10...dc3 11.Bc3 Nc6 12.0–0–+) 11.c5?? (better is 11.Na2 de3 12.fe3–/+) 11...c6 (11...dc3 12.Qc3 a5 13.0–0–+) 12.0–0?? (12.ed4 a5 13.ba5 Qa5+=) 12...Nbd7?? (better is 12...dc3 13.Bc3 Ne4 14.Bd4–+) 13.b5?? (better is 13.ed4!? b6 14.Rfd1+=) 13...ab5 (13...dc3 14.Bc3 Bc5 15.Bd3–+) 14.ab5?? (better is 14.ed4 ba4 15.Ra4 Ra4 16.Na4+=) 14...Ra1–+ 15.Ra1 h6 (15...dc3 16.Qc3 Nc5 17.Qc2–+) 16.b6?? (16.ed4 Re8+/–) 16...Nh7 (16...dc3!? 17.Qc3 Bc5 18.Bg4 Nb6 19.Qc5 Ng4 20.Qd4–+) 17.Ra7?? (17.ed4 Bf6 18.Bd3 Ng5+/–) 17...Qb8 (17...dc3 18.Qc3 Bf6 19.Qc2 Bb2 20.Qb2 Nc5 21.Qb4–+) 18.Ba6?? (better is 18.ed4 Re8 19.Bd3+/–) 18...ba6 (18...Nc5!? 19.Bb7 Nb7 20.Nd1–+) 19.Rd7 (better is 19.Nd5 cd5 20.Rd7–+) 19...Bg5?? (19...dc3 20.Re7 cb2 21.Qb2–+) 20.Qa4? (20.Nd5!? cd5 21.Bd4+=) 20...Nf6 (better is 20...dc3!? 21.Bc3 Qe8–+) 21.Rc7–/+ Rc8?? (better is 21...dc3 22.Bc3 Qe8–/+) 22.Qc6+– Rc7? (better is 22...Rf8 23.ed4 Bf4+–) 23.Qc7 (23.bc7?! Qc8 24.ed4 Bf4 25.Nd5 Nd5 26.Qd5 Bc7+–) 23...Qf8 24.b7 Nd7 (24...dc3 25.Bc3 Ne4 26.b8Q Nc3 27.Qf8 Kf8 28.Qb8 Ke7 29.Qe5 Kd7 30.Qc3+–) 25.Qc8 (better is 25.Qd7 dc3 26.Bc1 d4+–) 25...Bd8 (25...dc3 26.Ba3 c2 27.Qf8 Nf8+–) 26.c6 (26.c6 Nb6 27.Ba3 Nc8 28.Bf8+– (28.bc8Q?! Qa3 29.Qd8 Kh7+/–)) 1–0. Pytel,Krzysztof – Marzec,Z, Chelm Poland, 1960.

5.Nf3 Nc6+=.

5.Nf3 Be7 6.b5 ab5 7.ab5 Ra1 8.Ba1 Bg4 9.Be2 Bf3 (9...0–0 10.0–0=) 10.Bf3 e4 11.Be2 0–0 12.0–0 d5 13.c4 c6 (13...dc4 14.Bc4 Nbd7 15.Qc2+=) 14.Bf6 Bf6 15.cd5 cd5 (15...Qd5 16.Nc3 Qe6 17.Qc2 Bc3 18.dc3 cb5 19.Rb1=) 16.Qb3 (16.d4 Qd6+=) 16...b6 (16...d4 17.f3=) 17.Nc3 Bc3 18.dc3 Qd6 (18...Qg5 19.Rd1 Rd8 20.Rd4+/–) 19.c4 (19.Rd1 Rd8+/–) 19...dc4 20.Bc4 (20.Qc4 Qe7+=) 20...Qe5 (20...Nd7 21.Qd1 Qc7 22.Qd4=) 21.Rd1+= Qe7 22.h3 Kh8 (22...Nd7 23.Qc3+=) 23.Bd5 (23.Qc3!?+/–) 23...Nd7+= 24.Bc6 Nc5 25.Qb4 (25.Qd5 f5+=) 25...f5 (25...Rc8 26.Rd7 Qf8 27.Rd5+=) 26.Qd4+= Qf6 (26...Rc8 27.Qd6 Qf8 28.Qf8 Rf8 29.Rd6+=) 27.Qd6 (27.Qf6 gf6 (27...Rf6?? 28.Rd8 Rf8 29.Rf8) 28.Rd5 f4 29.ef4 Kg7+/–) 27...Nd3 (27...Qd6 28.Rd6 h6+=) 28.Qc7 (28.Qf6 gf6 29.f3 Nc5+/–) 28...Nb4 (better is 28...Qh4!? 29.Rf1 Qd8 30.Qd8 Rd8+=) 29.Qb6+/– Nc6 (better is 29...Nd3!?+/–) 30.bc6 h6 31.Qb7 Rf7 (31...f4 32.c7 fe3 33.fe3 Qc3+–) 32.c7 (32.c7 Kh7 33.Qb8 Rc7 34.Qc7+–) 1–0. GuestKHNH – GuestQBBT, freechess.org, 2017.

4.c4 b6

5.a3 A) 5...Nf6 6.Nc3 (6.d4 ed4 7.Qf3 Ra7 8.Bd4 Be7 9.Bd3 Nbd7=) 6...Be7 7.Nf3 0–0 8.d4 ed4 9.Qd4 c5=; B) 5...Be7 B1) 6.Qf3 Ra7 7.d4 ed4 8.Bd4 Bb7 9.Qg3 Bf6=; B2) 6.Be2 Nf6 (6...c6 7.d4 e4 8.d5 Nf6 9.Nc3 Bd7+=) 7.d4 e4 8.Nc3 Bf5 9.g4 Bg6=; B3) 6.d4 ed4 7.Nf3 Nf6 8.Nd4 c5 9.Nc2 Be6=; C) 5...c6 6.d4 e4 7.Qc2 d5 8.Nc3 Nf6 9.Rc1 Bf5=.

5.d4 ed4 6.Bd4 Be6 (6...c5 7.Bc3 cb4 8.Qa4 Nd7 9.Bb4 Bb7=) 7.Nf3 c5 8.Bc3 cb4 9.Bb4 Nf6=.

5.Be2 Bb7 6.Bf3 (6.Nf3 e4 7.Nd4 c5= 8.Nc2 Nf6 9.0–0 d5=) 6...Bf3 (6...e4 7.Be2+= d5 8.cd5 Qg5 9.Kf1 Bd5=) 7.Nf3 Nd7 (7...e4 8.Nd4 Nf6 9.Qc2 c6+=) 8.0–0 Ngf6 (8...e4 9.Ne1 Ngf6+=) 9.Nc3 h6 (9...Be7 10.d4+=; 9...c5+=) 10.Qc2 Be7 11.d4 ed4 12.Nd4 Ne5 (12...c5 13.Nc6 Qc8 14.Ne7 Ke7 15.Nd5 Nd5 16.cd5+/–) 13.Nce2 (13.Nd5 c5 14.bc5 Nd5 15.cd5 bc5+/–) 13...Qd7 14.Rfd1 c5 (better is 14...0–0!?+=) 15.bc5+– bc5 16.Nb3 (better is 16.Nf5!? Qc6 17.f4+–) 16...Qa4 17.Be5 de5 18.Ng3 0–0 19.Nf5 Qe8 (19...Rfe8 20.Rab1+=) 20.Rd2 g6 21.Nd6 Qc6 22.Na5 (22.Rad1 Rad8 23.Na5 Qc7=) 22...Qc7 23.Nab7 (23.Ndb7=) 23...Bd6?? (better is 23...Rfb8–/+) 24.Nd6+= (24.Rd6? Ne8 (24...Qb7?! 25.Rf6 Rfd8 26.Rb1+=) 25.Rd5 Qb7 26.Rc5 Qe7–+) 24...Qc6 (24...Ne8 25.Ne4+=) 25.Rad1 Ra7 26.Qc3 Re7 27.Qa5 (27.a3 Rb8+=) 27...Rb8 (27...Rd7 28.f4 ef4 29.Qc3= (29.ef4? Rfd8–+)) 28.f3 Kg7 29.Qc3 Re6 30.f4?? (30.e4!?+=) 30...Ne4?? (better is 30...Rd6 31.fe5 Ne4 32.Rd6 Qd6 33.ed6 Nc3–+) 31.Ne4= Qe4 ½–½. Devis,Wim – De Jonghe,Leo, Beveren, 1995.

5.Be2 c6 A) 6.Nc3 Qg5 (6...Nf6 7.d4 Bd7 8.Nf3 e4 9.Nd2 d5+=; 6...b5 7.d4 bc4 8.de5 d5 9.a3 a5=; 6...d5 7.cd5 cd5 8.a3 d4 9.ed4 ed4=) 7.Bf3 Nf6 8.b5 ab5 9.cb5 Qg6=; B) 6.d4 d5 (6...e4 7.d5 Qg5 8.Bf1 cd5 9.cd5 Nf6+=) 7.de5 Bb4 8.Bc3 Bc3 9.Nc3 Ne7=.

5.Be2 Be7 A) 6.d4 e4 (6...Bb7 7.Nf3 e4 8.Nfd2 d5 9.a3 Nf6+=) 7.d5 Nf6 8.Nc3 a5 9.ba5 Ra5=; B) 6.Bf3 c6 7.d4 d5 8.cd5 e4 9.Be4 cd5=.

5.Be2 Nf6 A) 6.Nc3 Be7 (6...Bb7 7.Nf3 e4 8.Ng5 h6 9.Nh3 Nc6=) 7.Nf3 0–0 8.0–0 c6 9.a3 a5=; B) 6.d4 ed4 7.Bd4 d5 8.a3 dc4 9.Bc4 Nc6=; C) 6.d3 Be7 (6...d5 7.a3 Bd6 8.Nf3 Nbd7 9.cd5 Nd5=) 7.Nf3 Bb7 8.0–0 0–0 9.a3 c5=.

5.Nf3 Bb7 6.Be2 h6 7.0–0 Be7 8.d4 e4 9.Nfd2 Nf6 10.d5 Nbd7 (10...c6 11.Nc3 cd5 12.cd5 Nd5 13.Nd5 Bd5 14.Nc4+=) 11.Qc2 (11.Nc3 a5 12.a3 c6 13.Nde4 Ne4 14.Ne4 cd5 15.cd5 0–0+–) 11...c6+/– 12.Nc3 (12.dc6 Bc6 13.Nc3 d5 14.cd5 Nd5 15.Nd5 Bd5 16.Ne4 Ra7+–) 12...cd5+= 13.Nd5 Bd5 14.cd5 Rc8 (14...Qc8 15.Qb1+/–) 15.Qb3 Ne5 (better is 15...a5!?+/–) 16.Ba6+– Rb8 17.Bb5 Nfd7 (17...Kf8 18.f3+–) 18.Ne4 0–0 19.Rfc1 Kh8 20.a4 f5 21.Ng3 Bh4 22.Bc6 (22.Ne2 Ng4 23.g3 Bf6+–) 22...Bg3 23.hg3 Qe7 24.Qc3 Nc6 25.dc6 Ne5 26.Rd1 Rbc8 27.b5 Kh7 (27...Rfd8 28.Rd5 Qf7 29.Rad1+–) 28.Qd4 g6 (28...Qc7 29.Ba3 Nf7 30.Bd6 Nd6 31.Qd6+–) 29.Qb6 Ng4 (29...Nc4 30.Qd4 d5 31.Rdb1+–) 30.Qd4 Nf2 (30...Rf6 31.Qd5 Re6 32.b6 Re3 33.b7+– (33.fe3?! Qe3 34.Kh1 Nf2 35.Kh2 Ng4 36.Kh3 Nf2 37.Kh2 Ng4 38.Kh1 Nf2 39.Kh2=)) 31.Kf2 Rf7 32.a5 Re8 (32...Qe4 33.Qd6 Re8 34.Bd4+–) 33.a6 g5 (33...Qe6 34.a7 Ra8 35.b6+–) 34.b6 f4 35.gf4 gf4 36.Qd3 Qe4 37.Qe4 Re4 38.ef4 (38.a7!? fe3 39.Kg1 Rf8+–) 38...Rff4 39.Kg1 Re2 40.c7 (better is 40.a7 Rg4 41.Kf1 Rb2+–) 40...Rff2 41.Bd4 (41.Rd6?! Rg2 42.Kf1 Rgf2 43.Kg1 Rg2 44.Kh1 Rh2 45.Kg1 Rhg2=) 41...Rg2 42.Kf1 1–0. GuestNQCZ – Habarnam, freechess.org, 2017.

5.Nf3 Bb7 6.Be2 h6 7.0–0 e4 8.Nd4 c5+=.

5.Nf3 Bb7 6.Be2 h6 7.a4 g6 (7...e4 8.Nd4=) 8.d4 Bg7 (8...e4 9.Nfd2 d5 10.Ba3+=) 9.0–0 Nd7 10.a5 ed4 (10...c5 11.de5 de5 12.Qa4 ba5 13.bc5+=) 11.ab6 (11.ed4 ba5 12.Ra5 c5+=) 11...cb6 12.Bd4 Bd4 (12...Ngf6 13.Nbd2+/–) 13.ed4 Ngf6 14.Nc3 0–0 15.Qd2 Kg7 16.Qf4 Re8 17.Qd6 Re6 18.Qg3 Bf3 (better is 18...Qe7!? 19.Nh4 Qb4+/–) 19.Qf3+– (19.gf3? Nh5 20.Qg2 Nf4–+) 19...Rd6 (19...Re8 20.Rfd1+–) 20.Rfd1 White plans d5 20...g5 (20...Qc8 21.c5 bc5 22.bc5+– (22.dc5?! Rd1 23.Nd1 a5+–)) 21.c5 bc5 22.bc5 Re6 23.Bd3 (23.Bc4 g4 24.Qf5 Rc6+–) 23...Nf8 (23...g4 24.Qf5+–) 24.d5 Re5 25.c6 (25.Ba6 Qe7 26.d6 Qe8+–) 25...Qc7 (25...a5 26.Be2+–) 26.h3 (26.Ra6 Ra6 27.Ba6 Qd6+–) 26...Ree8 (26...a5 27.Bc4 Qd6 28.Nb5+–) 27.Ba6 Red8 28.Qe3 (28.Qe3 Qd6 29.Nb5+–) 1–0. Janek – zandar, internet, 2017.

5.Nf3 Be7 6.Be2 Nf6 7.h3 0–0 8.0–0 Be6 9.d4= Nbd7 10.d5 Bf5 11.Nh4 Bb1 12.Rb1 Ne4 13.Bg4?? Bh4–+ 14.f3? Ng3 15.Rf2 f5 16.Bf5 Nf5 17.Re2 Qg5 18.e4 Ne3 (18...Ne3 19.Bc1 Rf3 20.Re3 Bf2 21.Kh1 Re3–+) 0–1. gtate (1965) – sammyo (1875), net–chess.com, 2004.

5.h3 Nf6 6.Be2 Nbd7 7.Nf3 Be7 8.0–0 Bb7 9.d4 e4 10.Nfd2 b5 11.c5 d5 12.Nc3 c6 13.f3 Bc8? 14.fe4+– a5 15.ba5 Ra5? 16.Nb3 Ra8 17.a4?? b4+= 18.Na2 Ra4 19.ed5 Nd5 20.Bh5 N7f6 21.Bf3 0–0 22.Nac1?? Ra1–+ 23.Ba1 Ne3 24.Qe2 Nf1 25.Kf1 Qc7 26.Nd3 Qa7 27.Nb4 Nd5?? 28.Nc6+/– Qd7? 29.Ne7?? Ne7=+ 30.Qa2 Qb5 31.Kg1? Be6–+ 32.Bd1? Rd8 33.Qb2? Nf5 34.Qf2? h6?? 35.g4 Ne7 36.Bc2?? Bc8 37.Nd2 Bb7 38.Ne4 Nc8 39.Qf5 Rd5 40.Nf6?? gf6–+ 41.Qh7 Kf8 42.Qh6 Ke8 43.Qh8?? Ke7 44.Qh6 Qe2 (44...Qe2 45.Qf6 Kf6–+) 0–1. gtate (2060) – sammyo (1935), net–chess.com, 2004.

4.c4 c5

5.a3 Nc6 6.Nc3=.

5.a3 Bd7 6.Nc3+= Nf6 7.d3 (7.Nf3 Nc6+=) 7...h6 8.Nf3 cb4 9.ab4 b6 (9...Nc6 10.b5 ab5 11.Nb5=) 10.Be2 (10.b5 Be7+/–) 10...Be7 11.0–0 (better is 11.b5 Bc8 12.Nh4+/–) 11...Qc8? (11...Nc6 12.Qb3+/–) 12.Qc2 (12.d4 e4 13.Nd2 Nc6 14.Nde4 Ne4 15.Ne4 Nb4+–) 12...b5? (better is 12...Nc6+/–) 13.cb5+– ab5?? (13...Bb5 14.Rfc1 Bd7+–) 14.Ra8 Bc6 (14...0–0+–) 15.Nb5! 0–0 (15...Bb5 16.Qc8 Double attack (16.Qc8 Pinning; 16.Qc8 Deflection; 16.Qc8 Clearance)) 16.Rb8! Qb7 (16...Qb8 17.Qc6 Deflection (17.Qc6 Remove defender; 17.Qc6 Overloading)) 17.Rf8 (17.Rf8 Bf8 18.Na3 Qb4 19.Rb1+–) 1–0. GuestLSHN – guestKAMPK, freechess.org, 2017.

5.bc5 dc5 6.Be5 Nc6 7.Bb2 Nf6 (7...Qb6 8.Qb3 Qb3 9.ab3+=) 8.Nf3 (8.Nc3 Bf5+=) 8...g6 (8...Bf5 9.Nc3+=) 9.Be2 (9.Nc3 Bg7+/–) 9...Bg7 10.0–0 0–0 11.Nc3 b5 (11...Re8!?+/–) 12.cb5+– ab5 13.Bb5 (13.Nb5 Qe7+–) 13...Rb8+/– 14.Rb1 (14.h3 Bf5+/–) 14...Nb4 15.a3 (15.e4!?+/–) 15...Nd3 16.Bd3 Qd3 17.Qe2?? (better is 17.a4 Bf5 18.Ba1+/–) 17...Ba6–/+ 18.Qd1 Ne4 (better is 18...Qf1 19.Qf1 Bf1 20.Kf1 Rb3–/+) 19.Na4?? (better is 19.Re1!? Bc3 A) worse is 20.dc3 Qd1 (worse is 20...Nc3 21.Bc3 Rb1 22.Qb1 Qc3 23.a4+=) 21.Red1 Be2–+; B) 20.Bc3 Nc3 21.dc3 Qc3 22.Rc1 Qa3 23.Qd6+=) 19...Bb2 (19...Qf1 20.Qf1 Bf1 21.Kf1 Rb5–+) 20.Nb2? (20.Rb2 Qf1 (20...Qa3?! 21.Qa1 Qa1 22.Ra1=) 21.Qf1 Bf1 22.Kf1 Ra8–/+) 20...Qa3?? (better is 20...Qf1 21.Qf1 Bf1 22.Kf1 c4–+) 21.Ra1= Qb2 22.Ra6 Rfd8 The pressure on the backward pawn d2 grows 23.d4 c4 (23...Nc3 24.Qa1 Ne2 25.Kh1 cd4 26.Ne5 Qa1 27.Raa1= (27.Rfa1? d3 28.Nc6 d2 29.Nd8 Rd8–+)) 24.Rc6 (24.Ne5 c3 25.Qf3 Qb7=) 24...c3 (24...Rdc8 25.Rc8 Rc8 26.Qb1=) 25.Qd3+= Rbc8?? (25...Re8 26.d5+=) 26.Rc8 (better is 26.Qe4 c2 27.g3+–) 26...Rc8= 27.Qb1?? (27.Qe4 c2 28.g3 c1Q 29.Rc1 Rc1 30.Kg2 Rc2 31.Qe8 Kg7 32.Qe5 Kg8 33.Qe8 Kg7 34.Qe5 Kg8 35.Qe8=) 27...Nd2 (better is 27...Qb1 28.Rb1 c2–+) 28.Nd2+= Qd2 29.Qc1? (29.Qb7 Rf8+=) 29...f5 (29...Qa2 30.e4 c2 31.d5–+) 30.Rd1? (30.g3 Kf7=) 30...Qb2 (better is 30...Qa2!? 31.Rf1 c2–+) 31.g3 (31.Re1 Rb8 32.h3 c2–+) 31...c2–/+ 32.Re1 (32.Qb2?? cd1Q 33.Kg2 Qc2 34.Qc2 Rc2–+) 32...Rb8 33.Kg2 Qb1 (33...Qa2!? 34.Re2 Rb2–/+) 34.Qd2= Qe1 35.Qe1 Rb1 36.Qa5 c1Q 37.Qd8 Kg7 38.Qe7 Kh6 39.Qh4 Kg7 40.Qe7 Kg8 41.Qe8 Kg7 42.Qe7 Kh6 43.Qh4 Kg7 ½–½. Sandin,Albin – Garanin,Egor, Nordic Championship for Scholastic Team, 2016.

5.bc5 dc5 6.Be5+= Nc6 7.Bc3 Nf6+=.

5.bc5 dc5 6.Be5+= Be7?? 7.Bg7+– Bf6 8.Bh8 Bh8 9.Nc3 Bc3 10.dc3 (10.dc3 Qf6 11.Qd2+–) 1–0. pierre (2165) – tpt456, internet, 2007.

5.bc5 Nc6 6.Qa4=.

5.bc5 Nc6 6.Nc3 dc5+=.

4.c4 c6

5.d4 e4=.

5.d4 f6 6.Nc3 g6 7.de5 fe5 8.Nf3 d5 9.cd5+/– Bg4 10.Qb3 cd5 11.Nd5 Nh6?? 12.Rd1 Nc6 13.e4 b5? 14.Rc1 Ne7 15.Ne5 Be6 16.Nf6# 1–0. mr – danelson (1850), net–chess.com, 2008.

5.Nf3 b5 6.a3 f5 (6...Nf6 7.d4 e4 8.Nfd2=) 7.Qc2 Bd7 8.Be2 e4 9.Nd4 Nf6 10.0–0 c5 11.Nb3 Be7 12.d3 0–0 (12...bc4 13.dc4 (worse is 13.Qc4 d5 14.Qc1 ed3+=) 13...Qb6 14.Qd2+=) 13.de4 fe4 14.Nc3 Kh8 (14...cb4 15.ab4 Nc6 16.Nd5+/–) 15.Ne4 Ne4 (15...Bf5!? 16.f3 bc4 17.Bc4 cb4 18.ab4 Nc6+/–) 16.Qe4+– Bc6 17.Qg4 Bf6 18.Bf6 Rf6 19.bc5?? (better is 19.Bd3 Qd7 20.Qh4+/–) 19...Rg6–/+ 20.Qh3 Bg2 21.Qg2 Rg2 22.Kg2 bc4 23.Bc4 Qg5 24.Kh1 dc5 25.Rg1 (25.Rfd1 Qe7 26.Nc5 Nc6=) 25...Qh4?? (better is 25...Qf5 26.Rac1 Nd7–/+ (26...Qf2?? 27.Rgf1 Qf1 28.Rf1+–)) 26.Bd5+= Qa4? (26...Ra7!? 27.Nc5 Re7+=) 27.Ba8 (27.Nc5 Qa5 28.Ba8 Qc5+–) 27...Qb3+/– 28.Rad1 (better is 28.Rab1 Qg8 29.Rb6+–) 28...Qg8? (28...g6 29.Rb1 Qg8 30.Rb6+/–) 29.Bd5 (better is 29.Rg5 h6 30.Rc5+–) 29...Qf8 30.Bc4?? (30.Rb1 Nd7+/–) 30...h6 (better is 30...Qf3 31.Rg2 Qd1 32.Rg1 Qf3 33.Rg2 Qe4–+) 31.Rd2 Nc6 32.Rgd1?? (better is 32.Bd5 Ne7 33.Be4+/–) 32...Qf3–+ 33.Kg1 Qg4 34.Kh1 Qc4 35.Rd6 Ne5 36.Rg1 (36.h3–+) 36...Qe4 37.Rg2 Ng4 (37...Qb1 38.Rg1 Qb7 39.Rg2–+) 38.Rd2 (38.Rd8 Kh7 39.Rf8 Qc4–+) 38...c4 39.h3 (39.Rd8 Kh7 40.Rf8 g5–+) 39...Qb1 40.Rg1 Qe4 (better is 40...Qb7 41.Rg2 c3 42.Rd8 Kh7 43.Rd4 Nf2 44.Kg1 Nh3 45.Kh2–+) 41.Rg2 Ne5 42.Rd8 Kh7 43.Rd4 (43.Re8 Qf5 44.Re5 Qe5–+) 43...Qf3 44.Kh2 Nd3 (better is 44...c3 45.Rf4 Qd1 46.Rg3–+) 45.Rc4 (45.Rd7 Qf6 46.f4–+) 45...Nf2 46.Rf4 (46.Rh4 Qe3 47.a4 g5–+) 46...Qh3 47.Kg1 Nd3 48.Rfg4 Qe3 49.Kh2 g5 50.R4g3 Qe5 51.Kh1 (51.Kg1 Nf4–+) 51...Nf4 (51...Nf2 52.Kh2 Ne4 53.Kh3–+) 52.Rg1 (52.Kh2 Ng2 53.Kg2 Qe2 54.Kg1 h5–+) 52...Ne2 (52...Ne2 53.R3g2 Ng1 54.Kg1 h5–+) 0–1. GuestVWGW – GuestDYMH, freechess.org, 2017.

5.Nf3 Qc7 6.Be2 f6 (6...e4 7.Nd4=) 7.Nc3 Nh6 8.0–0 Nf5 9.d3 (9.d4 Be7+/–) 9...g5 (9...d5 10.Qa4+=) 10.e4+/– Ng7 11.a4 h5 12.b5 (12.d4 Ne6 13.d5 Nf4+/–) 12...a5 (12...Ne6 13.bc6 bc6 14.Rb1+=) 13.Nd2 (13.d4 h4+/–) 13...h4 14.h3 f5 15.ef5 Bf5 16.Nde4 Qe7 (16...Be7 17.d4+/–) 17.Qd2 (17.d4 ed4 18.Qd4 Nd7+–) 17...Ne6 18.Nd1 (18.Ba3 Qd8+/–) 18...Nf4 (18...g4 19.Bg4 Bg4 20.hg4+=) 19.Ne3+/– Be4 20.de4 Bh6 (20...Nd7!?+/–) 21.Bg4+– Nd7?? (better is 21...Bf8+–) 22.Nf5 Qf8 (22...Qh7 23.Nd6 Kf8 24.Nb7 Nf6 25.Qd6 Qe7 26.Qc6 Kg8+–) 23.Nd6 Ke7 24.Ba3 (24.Ba3 Kf6 25.Nb7+–) 1–0. GuestPRBF – GuestHTWK, freechess.org, 2017.

5.Nf3 Be6 6.Qc2 f6 7.Be2 Ne7 8.d3 (8.d4 a5+=) 8...Bf7 (8...a5 9.b5=) 9.0–0+= Ng6 10.Nbd2 Nd7 11.Ne4 (11.d4!?+=) 11...d5= 12.cd5 cd5 13.Ng3 (13.Nc5 Rc8 14.d4 b6 15.Ba6 Rc7=) 13...Bb4+= 14.Nf5 0–0 15.Qa4 Be7 16.Ne7 Qe7 (better is 16...Ne7!? 17.Rfc1 Be6+=) 17.Ba3= b5 (better is 17...Nc5!? 18.Qa5 b5+=) 18.Be7+/– (18.Be7 ba4 19.Bf8 Kf8 20.d4+/–) 1–0. GuestRBHB – GuestXBFY, freechess.org, 2017.

5.Nf3 Nf6 6.Be2 (6.Nc3 e4 7.Nd4 c5=) 6...Qb6 (6...e4 7.Nd4=) 7.Qb3 Be6 (7...Be7 8.0–0=) 8.Nc3 (8.Ng5 Be7+=) 8...h6 (8...Bg4 9.0–0=) 9.a4 (9.d4 Nbd7+=) 9...a5 (9...c5 10.b5=) 10.b5 Nbd7 11.0–0 Nc5 (11...d5 12.d4 dc4 13.Bc4 Bc4 14.Qc4+=) 12.Qc2+= Bd7 (12...cb5 13.Nb5 Na6 14.d4+/–) 13.d4+/– ed4 14.Nd4 (14.ed4 Ne6+/–) 14...Be7 15.Rfd1 0–0 16.Bf3 (16.Nf5 Bf5 17.Qf5 Rac8+/–) 16...Bg4 (16...Rfe8 17.Nf5 Qc7 18.Ne7 Re7 19.bc6 Bc6 20.Nb5 Bb5 21.cb5+/–) 17.Bg4 Ng4 18.h3 (18.Nf5 Qc7+/–) 18...Nf6 (18...Ne5 19.Nf5 Rfe8 20.Ne7 Re7 21.Rd6+/–) 19.Nf5+/– Qc7 20.Rd4 (20.b6 Qd7+/–) 20...Rad8 (20...Ne6 21.Rd2+=) 21.Rad1+/– d6 seems the pivot of the position 21...Rfe8 (21...Ne6 22.R4d2+/–) 22.Ba3 b6 (22...Kh8 23.bc6 bc6 24.Bc5 dc5 25.Rd8 Rd8 26.Rd2+=) 23.Ne7 (23.bc6 Qc6 24.Nb5 Rd7+/–) 23...Re7 24.Bc5 bc5 25.Rh4 (25.R4d3 Red7+/–) 25...Rde8 26.Qf5 Re5 (26...Re6 27.Rb1+=) 27.Qf3 Rc8 (27...cb5 28.Nb5 Qe7 29.Nd6+= (worse is 29.Rd6 Ne4 30.Re4 Re4+=)) 28.Qg3 (28.Rf4 Re7+/–) 28...Kh7+= 29.f4 Ne4 (29...Re7 30.Qf3+=) 30.Ne4 Re4 31.f5 Rh4 32.Qh4 Re8 33.Qf4 Re5 34.g4 (34.f6 cb5 35.fg7 f5+/–) 34...f6 35.h4 White prepares the advance g5 (35.Qf3 cb5 36.ab5 Qe7=) 35...cb5 (35...Qe7 36.Kf2=) 36.cb5 (36.ab5 Qe7 37.Kf2 a4+=) 36...c4 (36...Qe7 37.g5 fg5 38.hg5 hg5 39.Qf3+=) 37.g5= hg5 38.hg5 Qc5 Exerts pressure on the backward pawn (38...fg5 39.Qg5 Qc5 40.Qh4 Kg8 41.Qd8 Kf7 42.Kh1= (42.Rd6 Qe3 43.Kg2 Qe2 44.Kg3 Re3 45.Kh4 Qf2 46.Kg4 Rg3 47.Kh5 Qf5 48.Kh4 Rh3; 42.Qa5 Qe3 43.Kg2 Qe2 44.Kg1 Qd1 45.Kh2 Re2 46.Kg3 Qd3 47.Kg4 Re4 48.Kg5 Qe3 49.Kh5 Qh6)) 39.g6 (39.gf6!? Rf5 40.Qe4+=) 39...Kg8= 40.Rd4 Qb4 (40...Rf5 41.Qe4 (41.Rc4?? Rf4 42.Rc5 Rg4 43.Kf2 dc5–+) 41...Rg5 42.Kf1 Qf5 43.Qf5 Rf5 44.Ke2+–) 41.Qf3 (41.Rc4 Qe1 42.Qf1 Qe3 43.Qf2 Qg5 44.Kf1 Re8+= (44...Qf5 45.Qf5 Rf5 46.Ke2 Re5 47.Kf3+–)) 41...Re8?? (better is 41...Kf8 42.Kh2 Qb2 (42...Qa4?? 43.Qa8 Re8 44.Qd5+–) 43.Kg3 Qb1=) 42.Qd5 1–0. Van Esbroeck,Dirk – Benali, Melsele, 1993.

4.c4 Nc6

5.a3 a5 6.b5 Nce7 7.Nf3 b6 (7...e4 8.Ng5+=) 8.Be2 c6 9.a4 c5 10.Nc3 Be6 11.0–0 g6 12.d4 cd4 13.ed4 ed4 (13...f6!?+/–) 14.Nd4 Bg7 15.Ne6 Qc8?? (better is 15...fe6 16.Bg4 Nf5+–) 16.Ng7 Kf8 17.Nd5 Nd5 18.cd5 f6 (18...Ne7 19.Nh5 Rg8 20.Nf6+–) 19.Ne6 Kf7 20.Rc1 Qb7 21.Bf3 (better is 21.Rc7 Qc7 22.Nc7 Rc8+–) 21...Rc8 22.Qd2 Ne7 (22...Ke8 23.Qf4 h5 24.Qd6+–) 23.Rc8 Rc8 24.Rc1 (24.Qh6 Ke8 25.Bf6 Kd7+–) 24...Re8 (24...Rc1 25.Qc1 Qc8 26.Qh6+–) 25.Qd4 (better is 25.Rc7 Qc7 26.Nc7+–) 25...Nd5 26.Bd5 Qe7 (26...Kg8 27.Qf6 Rb8 28.Nc5 Qd5 29.Qg7) 27.Nc7 (27.Rc7 Kg8 28.Re7 Re7 29.Qf6 h6 30.Qg6 Rg7 31.Qg7) 27...Kf8 28.Ne8 Ke8 (28...Qd7 29.Qf6 Ke8 30.Re1 Qe6 31.Bc6) 29.Rc8 Kd7 30.Qc4 (30.Qc3 Qe1 31.Qe1 Kc8 32.Qe8 Kc7 33.Qc6 Kd8 34.Bf6) 30...Qe1+– 31.Qf1 Qf1 32.Kf1 Kc8 33.Bf6 Kd7 34.Bg8 h6 35.Bf7 g5 36.Bg7 Ke7 37.Bg6 d5 38.Bh6 Kd6 (38...Kf6 39.Bd3 Ke5+–) 39.Bg5 Kc5 40.Be7 Kc4 41.Bc2 (better is 41.h4 d4+–) 41...d4 42.Ke1 d3 43.Bd1 Kc3 44.Bd8 d2 45.Ke2 Kb2 46.Bb6 Kc1 47.Ba5 Kb2 48.Bd2 Ka3 (48...Ka2 49.b6 Ka3 50.b7 Ka2 51.a5 Ka3 52.b8Q Ka2 53.Qb3 Ka1 54.Bc3) 49.a5 (49.b6 Ka2 50.b7 Ka3 51.b8Q Ka2 52.Qb3 Ka1 53.Bc3) 49...Kb2 (49...Ka2 50.b6 Ka3 51.b7 Ka2 52.a6 Ka3 53.a7 Kb2 54.b8Q Ka3 55.a8Q) 50.a6 (50.b6 Ka3 51.b7 Ka2 52.a6 Ka3 53.a7 Kb2 54.b8Q Ka3 55.a8Q) 50...Ka3 (50...Ka2 51.b6 Kb2 52.a7 Kb1 53.b7 Kb2 54.b8Q Ka3 55.a8Q) 51.a7 Kb2 52.a8Q Kb1 53.Qe4 (53.Bb3 Kb2 54.Qa2) 53...Kb2 (53...Ka1 54.Bc3 Ka2 55.Qc2 Ka3 56.Qa4) 54.Qc2 Ka1 (54...Ka3 55.Qb3) 55.Bc3 1–0. Fournier,Frederic – eolo, Active, 2008.

5.a3 Bd7 6.Nc3 Nf6 7.Be2 Ne7 (7...a5 8.b5 Ne7 9.Bf3+=) 8.Nf3 g6 (8...e4!? 9.Nd4 c5=) 9.0–0+= Bg7 10.Ng5 (10.d4 ed4 11.Nd4 0–0+=) 10...h6= 11.Nf3 0–0 12.c5 (12.d4 e4 13.Nd2 Bf5+=) 12...Re8 (12...e4 13.cd6 cd6 14.Nd4=) 13.cd6+= cd6 14.e4 Bc6 15.d3 Rc8 16.a4 (16.Rc1 d5=) 16...Qd7 (16...d5 17.b5 d4 18.bc6 dc3 19.cb7+=) 17.Qb1 b6 (17...Qe6 18.d4=) 18.d4 White plans b5 18...Bb7 (18...Qb7 19.d5 Bd7 20.Qd3+/–) 19.de5+= de5 20.b5 a5 21.Rd1 (21.Ne5 Qd6 22.Nc4 Qe6+/–) 21...Qe6 22.Qd3 Rc7 23.Nd2 Nc8 (23...Rec8 24.Rac1+=) 24.Rac1 Qe7 (24...Nd6 25.Qe3+=) 25.Nc4+/– Rd7 26.Qe3 White gets the initiative 26...Red8 27.Nb6 Rd1 28.Rd1 Rd1 29.Nd1 Qb4 Now all is on e4 (29...Nb6!? 30.Qb6 Ne4+/–) 30.Bc3+– Qe4 31.Qe4 Ne4 (31...Be4?? 32.Nc8 Bc2 33.Nb2+–) 32.Ba5 Ncd6 33.Bb4 Bf8 (33...Nc8 34.Nc8 Bc8 35.f3+–) 34.Nd7 Bg7? (34...f6 35.Bd3 Bg7 36.f3+–) 35.a5 (35.f3 f5+–) 35...Nb5? (35...Nf5+–) 36.Bb5 Ng5 (36...f5 37.Bc4 Kh7 38.a6+–) 37.Nc5 Ba8 (37...Bd5 38.Ne3 Be6 39.h4 Nh3 40.gh3+–) 38.Ne3 h5 (38...f5 39.Bc4 Kh7 40.a6+–) 39.Bc4 (39.Bc4 h4 40.a6+–) 1–0. Staberg,Karl Arne – Engvall,Ville, corr SSKK 3–1341, 1992.

5.a3 Bd7 6.d4 ed4 7.ed4 Be7? (7...Nf6 8.Qe2 Be7 9.d5=) 8.Bd3 (better is 8.d5 Bf6 9.dc6 Qe7 10.Ne2 Bc6 11.Nbc3+–) 8...Nf6= 9.Ne2 0–0 10.Qc2 Qc8 11.0–0 Nd8 12.d5 c6 13.Nbc3 g6 14.Nf4 cd5? (better is 14...Re8+/–) 15.Ncd5+– Nd5 16.Nd5 (16.cd5?! Qc2 17.Bc2 Bg5=) 16...Bg5 (16...Nc6 17.b5 Bd8 18.bc6 bc6 19.Nf6 Bf6 20.Bf6 Re8+–) 17.Qc3 f6 18.Ne7 (18.Ne7 Kh8 19.Nc8 Rc8 20.Qd4+–) 1–0. Fournier,Frederic (1990) – NN, Active, 2004.

5.a3 Be6 6.Nc3 d5 (6...Nf6!?=) 7.cd5+= Bd5 8.Nd5 Qd5 9.Qc2 Rc8 (9...Nge7!?+=) 10.Nf3+/– Nf6 (10...Rd8 11.e4 Qd7 12.Ne5 (12.Be5?! Ne5 13.Ne5 Qd4=) 12...Ne5 13.Be5+/–) 11.Bc4 Qd7 (11...Qd6 12.Ng5 Nd8 13.Qf5+–) 12.Ng5 (12.Be5 Ng4 13.Bc3 Nh6+–) 12...Nd5 13.0–0 (13.e4 Qg4 14.ed5 Nb4 15.ab4 Qg5+–) 13...h6 (13...f6 14.Nh7 Nb6 15.Bd3+–) 14.Nf7!+– Qf7 (14...Qf7 15.Bd5 Double attack (15.Bd5 Decoy); 14...Kf7 15.Bd5 Pinning) 15.e4 Nce7 16.ed5 Nd5 (16...b5 17.Bb3 Qg6 18.Rac1+–) 17.f4 (better is 17.Rae1 Kd7 18.Re5+–) 17...e4?? (17...Be7 18.fe5 Qe6 19.Bd5 Qd5 20.Qg6 Kd8+–) 18.Qe4 Be7 (18...Qe7 19.Qd5 Qd6 20.Qf7 Kd8 21.Rf3+–) 19.Bd5 (19.Bd5 Qf8 20.Be6+–) 1–0. Janek – Larry, internet free game, 2017.

5.a3 Bf5 6.Nf3 Nf6 7.d3 Be7 8.Be2 h6 9.Nbd2 0–0 10.Qc2 Bh7 11.0–0 Nb8 12.e4 c6 13.c5 Nbd7 14.Nc4 dc5 15.bc5 Bc5 16.Nce5 Ne5 17.Ne5 Ba7 18.a4 Nd7 19.Ng4 h5 (19...Re8 20.a5+=) 20.Qc3+/– Qg5 21.h4 Qg6 22.Ne5 Ne5 23.Qe5 Bb8 24.Qh5 Qh5 25.Bh5 g6 (25...Rd8 26.Rfd1+/–) 26.Be2 Re8 27.Rfb1 Bc7 28.Bd4 b5 29.Rc1 Re6?? (better is 29...Rac8+–) 30.ab5 cb5 (30...a5+–) 31.Rc7 Rd6 32.Bc5 Rdd8 33.Be7 Rdc8 (33...Rdb8 34.Bb4+–) 34.Ra6! Rc7 (34...Ra6 35.Rc8 Deflection (35.Rc8 Overloading)) 35.Ra8 Kg7 36.Bf8 Kf6 37.Ra6 Ke5 (37...Rc6 38.Rc6 Ke5 39.Bg7 f6 40.Bf6 Kf4 41.g3) 38.Bg7 f6 39.Bf6 1–0. Heini – chessenemy, internet, 2016.

5.a3 g6 6.Nc3 (6.Nf3 Bg7=) 6...f5 (6...Bg7 7.b5 Nb8 8.Nf3=) 7.d4+= Bg7 8.Nf3 Nh6 (8...e4 9.d5+=) 9.Qb3 (9.d5 Ne7+=) 9...ed4= Black fights for the Initiative 10.Nd5 0–0 11.Nd4 Nd4 12.Bd4 Bd4 13.ed4 c6 14.Qh3 (14.Nc3 Re8 15.Be2 Qh4=) 14...Re8+= 15.Be2 (15.Ne3 Qg5 16.Qg3–+) 15...cd5–/+ 16.Qh6 dc4 17.h4 (17.Ra2 Qf6–+) 17...b5 18.Kf1 Bb7 19.f4? (better is 19.h5 g5 20.Re1–+) 19...Bg2! (19...Bg2 20.Kg2 Re2 21.Kh3 Qe7–+) 0–1. Laine – Bateman,Michael Keith, corr GB–CA, 1992.

5.a3 h6 6.Be2 Nge7 (6...Nf6 7.d4 ed4 8.ed4=) 7.Nf3 (7.d4 ed4 8.ed4 d5+=) 7...Nf5 (7...e4 8.Nd4=) 8.0–0 Nh4 (8...e4 9.Ne1+=) 9.Nc3 (9.d4 e4 10.Nh4 Qh4+/–) 9...Be7 (9...Be6 10.Nd5 Nf3 11.Bf3+=) 10.d3 (10.Nh4 Bh4 11.d4 0–0+=) 10...Bf6 (10...0–0 11.Nd5+=) 11.Nd5+/– Ne7?? (better is 11...Ng6+/–) 12.Nf6+– gf6 13.Nh4 Nf5 (13...Rg8 14.d4+–) 14.Nf5 (14.Nf3 Ne7+–) 14...Bf5 15.Bg4 (15.f4 Qd7+–) 15...Qd7 16.Bf5 Qf5 17.f4 (17.e4 Qg6+–) 17...Rg8 (17...Qg6 18.Qf3 0–0–0 19.e4+–) 18.fe5 Qh3 19.Qf3 Qf3 20.Rf3 fe5 21.Raf1 Rf8 (21...Rg7 22.d4 ed4 23.ed4+–) 22.c5 (22.d4 a5 23.de5 ab4 24.ab4 Ra2+–) 22...0–0–0 (22...a5 23.b5+–) 23.Rf7 Rf7 24.Rf7 Rg8 (24...dc5 25.Be5 Rd3 26.Rc7 (worse is 26.Bc7 cb4 27.ab4 Re3+–) 26...Kd8 27.bc5 Re3 28.Bd6+–) 25.cd6 (25.Rh7 Rg6+–) 25...cd6 26.Rf6 (better is 26.Rh7 Rg6+–) 26...h5 (26...Kd7 27.Rh6 Rc8 28.Rf6+–) 27.Rd6 Kc7 (27...e4 28.de4 h4 29.Rh6+–) 28.Be5 Kc8 29.Rh6 Re8 (29...Rg5 30.d4+–) 30.d4 b6 (30...b5 31.Rh5 Re6 32.d5+–) 31.Rb6 a5 32.ba5 h4 33.Rc6 (better is 33.Rb8 Kd7 34.Re8 Ke8+–) 33...Kd7 (33...Kb7 34.Rh6+–) 34.Rc7 (34.Rd6 Ke7+–) 34...Ke6 35.a6 Rg8 (35...Ra8 36.Rh7 Kf5 37.Rh4 Ra6 38.e4 Kg6 39.Rh3+–) 36.Rb7 (36.a7 Ra8 37.e4 h3+–) 36...h3 (36...Ra8 37.Rh7 Kf5 38.Rh4 Ra6 39.e4 Kg6 40.Rh3+–) 37.g3 (37.a7 Ra8+–) 37...Kd5 (37...Ra8 38.a7 Kd5 39.g4+–) 38.a7 (better is 38.Rb5 Kc6 39.a4+–) 38...Ke4 39.Rb8 Rb8 40.ab8Q Ke3 41.Qb3 Ke2 (41...Ke4 42.Kf2 Kf5 43.Qf7 Kg5 44.Bf4 Kg4 45.Qg6) 42.Bf4 Ke1 43.Qe3 Kd1 44.Qd2 1–0. GuestJKKR – GuestZLQC, freechess.org, 2017.

5.Qa4 Bd7 6.Qb3 Be6 7.Nf3 h6 8.Nc3 Nf6 9.Nd5 Bd5 10.cd5+= Ne7 11.b5 Ned5 12.Bc4 c6 13.a4 ab5 14.ab5 Ra1 15.Ba1 Qb6 16.0–0=+ Be7 17.Re1 0–0–/+ 18.g3 Nc7 19.bc6 Qb3 20.Bb3 bc6 21.d4 e4 22.Nh4 g6 23.Ng2?? Nb5 24.Nf4 g5 25.Ng2 Rb8 26.Rc1 c5 27.dc5=+ dc5 28.Bf6 Bf6 29.Rc5 Nd6 30.Bc2 Ra8 31.h4 Ra1 32.Kh2=+ Rc1 33.Rc6= Ne8? 34.Be4+/– Rc6 35.Bc6 Nd6 36.e4 Kg7 37.Kh3 gh4 38.Nh4 Bh4 39.gh4 Kf6 40.f4 Nc4 41.Kg3 Kg7 42.Bd5+– Nd6 43.f5 Kf6 44.Kf4 Kg7 45.f6 Kg6 46.e5 Nf5 47.h5 (47…Kh7 48.Kf5+–) 1–0. Dopper,Johan – Bremer,Henk, 1994.

5.b5 Na5 6.a4 (6.d4 ab5 7.cb5 e4=) 6...c6 (6...Be6 7.d3+=) 7.Nc3 Be6 8.d3 cb5 (8...d5 9.bc6 bc6 10.Nf3=) 9.ab5= ab5 10.Nb5 d5 (better is 10...Nf6!?+=) 11.Qa4+– Bd7 12.Be5 dc4 13.dc4 f6? (better is 13...Bb5 14.cb5 Rc8+–) 14.Nc7?? (better is 14.Bc7 Bb5 15.cb5+–) 14...Kf7= 15.Qd1 fe5? (15...Bb4!? 16.Ke2 Rc8 17.Qd5 Ke7=) 16.Qd5+/– Kf6 17.Na8 Qa8?? (17...Bb4 18.Ke2 Ne7–/+) 18.Qd7+– (18.Ra5?! Bb4 19.Ke2 Bg4 20.f3 Qa5 21.Qa5 Bf3 22.Nf3 Ba5+/–; 18.Qa5? Qa5 19.Ra5 Bb4 20.Kd1 Ba5–+) 18...Bb4 19.Ke2 Ne7 20.Qb5 Bc3?? (20...Nec6+–) 21.Ra3 Bb2 (21...Rd8 22.Rc3 Nac6 23.Qb1+–) 22.Qb6 (better is 22.Ra5!? Qd8 23.Ra2 Bc3 24.Qb7 e4 25.Qe4 Qc8+–) 22...Nec6 23.Qb2 Rd8 0–1. GuestNZTQ – GuestWJSX, freechess.org, 2017.

5.b5 Nb4?? 6.a3+– 1–0. GuestRJPV – GuestDKZL, freechess.org, 2017.

5.b5 ab5 6.cb5 Na5 7.Nf3 c6 8.Nc3 Bd7 9.bc6 Bc6 10.Be2 e4 (10...Nf6!?=) 11.Nd4+= Qg5 12.0–0 (worse is 12.Nc6 Qg2 13.Rf1 bc6–/+ (13...Nc6?! 14.Qb3 Rb8 15.Bc4+=)) 12...d5 13.Nc6 Nc6 (13...bc6!? 14.d3 Rb8+=) 14.Qb3+/– Na5?? (better is 14...Nge7+/–) 15.Qb5+– Nc6 (15...Kd8 16.Nd5 Ra6+–) 16.Qb7 Ra7 17.Qc6 Kd8 18.Nd5 (better is 18.Qb6 Ke7 19.Qa7 Ke6 20.Qa6 Bd6+–) 18...Nh6 (18...Qg6 19.Qb5 Bd6 20.Qb6 Rc7 21.Bg7 Ne7+–) 19.Qb6 1–0. GuestNZTQ – GuestNJVB, freechess.org, 2017.

5.b5 ab5 6.cb5 Na5 7.Nf3 Nf6 8.Nc3 Nc4?? 9.Bc4+– Be6 10.Be6 fe6 11.Qb3 e4 12.Ng5 Qe7 13.Nce4 d5 14.Ng3 h6 15.Nf3 g5 16.Ne5 Qh7 17.a4 0–0–0 18.a5 Ne8 19.a6 ba6 20.ba6 Nd6 21.a7 (21.a7 Qb1 22.Rb1 Bg7 23.a8Q) 1–0. pumpkin (1980) – caffine, net–chess.com, 2001.

6.cb5 Nb4 7.a3 (7.Qb3 c5 8.bc6 Nc6 9.Nf3 Nf6 10.Bc4 Qd7 11.Be2 Qe6) 7...Nd5 8.Bc4 (8.e4 Nf4= (8...Nb6 9.Nc3 Nf6 10.Nf3 d5 11.ed5 Bd6) 9.d4 ed4 10.Bd4 d5 11.Be3 Qf6) 8...Be6 (8...Nb6 9.Bb3= Nf6 10.Ne2 Qd7 11.a4 Qg4; 8...Ngf6 9.Qb3 Be6 10.Nc3 c6 11.Nf3 Be7) 9.Qf3 (9.Qb3 Ngf6= 10.Nc3 c6 11.Nf3 Be7) 9...c6 (9...Ngf6 10.e4 Nf4 11.Be6 Ne6 12.Nc3+=) 10.Nc3 (10.e4 Nf4 11.Be6 Ne6) 10...Ngf6 11.Nd5 (11.bc6 bc6 12.Nd5 cd5 13.Bb5 Bd7 14.Bd7 Qd7=) 11...Nd5 (11...cd5 12.Bf1+=) 12.Ne2 (12.e4 Nf4 13.Be6 Ne6 14.bc6 Qb6=) 12...Be7 (12...Qb6 13.Rc1+=) 13.Ng3 (13.bc6 bc6 14.e4 Nf6 15.Be6 fe6=) 13...0–0+= 14.0–0 (14.bc6 bc6 15.Bd5 Bd5+=) 14...Bf6 (14...Ne3!? 15.de3 Bc4–/+) 15.Nh5 (15.bc6 bc6 16.Rfb1 Qd7=) 15...Bg5 (15...Ne3 16.fe3 Bc4 17.Nf6 Qf6 18.Qf6 gf6 19.Rf6 Bb5 20.Rd6 e4+=) 16.d4? (16.Rfc1 f5=) 16...g6 (16...Ne3 17.fe3 Bc4 18.Rf2 Bb5 19.de5 de5 20.Be5–+) 17.Ng3 (better is 17.bc6 bc6 18.e4+=) 17...Bf6 (better is 17...Ne3!? 18.fe3 Bc4 19.bc6 bc6–/+) 18.Ne4 (18.Rfc1 ed4 19.Bd5 Bd5+=) 18...Bg7 19.Qg3 (19.de5!? de5 20.Nc5+=) 19...cb5 (19...Ne3!? 20.fe3 Bc4 21.de5 Bf1 22.Rf1 de5 23.Be5 Re8 24.Bg7 Re4 (24...Kg7?! 25.Nd6–/+) 25.bc6 Kg7 26.cb7 Rb8 27.Rf7 Kf7 28.Qf3 Ke8 29.Qe4 Qe7 30.Qa4 Kd8 31.Qd4 Kc7–+) 20.Bb5 ed4 (20...Qb6!? 21.a4 Nc7 22.de5 Nb5 23.ab5 Qb5+=) 21.Bd4+= (worse is 21.Nd6 Qb6 22.a4 de3 23.Bg7 Kg7+=) 21...Bd4 22.ed4 Nc7 (22...Qb6 23.a4+= (23.Nd6? Rfd8–+)) 23.Nd6 Nb5 24.Nb5 Ra5 (24...Bc4 25.Rfb1 Bb5 26.Rb5 Qd4 27.Rf1+=) 25.Qe5 (better is 25.Rfb1+/–) 25...Bc4–/+ 26.Rfb1 Re8 (26...Bd3 27.Qc5+=) 27.Qc5+= Bd3 28.Rb3? (better is 28.h3!? b6 29.Qc6+=) 28...b6–+ 29.Qb4? (better is 29.Qc7 Bb5 30.Qd8 Rd8 31.Rb4–+) 29...Rb5 (29...Bb5?! 30.Rb2–+) 30.Qc3 (30.Rd3 Rb4 31.ab4–+) 30...Rb3 31.Qb3 Qd4 32.Rd1 (32.Qd1 Re2 33.Kh1 Rf2 34.Rb1–+) 32...Bc2 (32...Re2 33.Kh1 Qf2 34.Qf7 Kf7 35.Rg1 Re1 36.Re1 Qe1) 33.Qc2= (33.Rd4?? Re1) 33...Kg7 34.Kf1 (34.h3 Qf6=) 34...Qh4 (34...Qe5 35.g3=) 35.Qb2 Kg8 36.h3 Qf4 (36...Qa4!? 37.Rb1 Qc4 38.Kg1 b5=) 37.Qb5 ½–½. mtr – esilver, internet, 2001.

5.a3 Nf6

6.Qa4 Bd7 7.Qc2= b5 (better is 7...h6!?=) 8.cb5+/– ab5 9.Bb5 Qb8?? (better is 9...Ne7 10.Nc3 c6+/–) 10.Bc6+– 1–0. marektheim – tnrt, internet, 2015.

6.Qa4 Bf5!? +=.

6.Nc3 Be6 7.Nf3 d5 (7...Bg4 8.h3 Be6 9.d4 ed4 10.Nd4 Nd4 11.Qd4=) 8.cd5 (8.b5 ab5 9.cb5 Na5 10.Ne5 d4 11.ed4 Bd6+=) 8...Nd5= 9.Qc2 Bd6 (9...Nc3 10.dc3 Qf6 11.c4=) 10.Ne4 (better is 10.Nd5 Bd5 11.e4=) 10...Bf5?? (better is 10...Nf6=) 11.Nd6+– cd6 12.Qf5 g6 (12...Nce7 13.Qb1+–) 13.Qh3 0–0 14.Bc4 Nf6 15.0–0 e4 (15...Rc8 16.Rac1+–) 16.Ng5 (16.Qh4 Ne5 17.Ne5 de5 18.Be5 Nd7 19.Qe4 Ne5 20.Qe5 b5+–) 16...h5 (16...Nh5 17.Ne6! Qd7 18.Nf8 Qh3 19.gh3 Kf8 20.Bd5+–) 17.Qg3 Re8 (17...Ng4 18.Ne4 Nge5+–) 18.Nf7 (18.Nf7 Kf8 19.Nd8 Red8 20.Qg6+–) 1–0. Woelfelschneider,Peter – Gruene, 2008.

6.Nc3 Be7 7.Nf3=.

6.d3 Be7 7.Nf3 0–0 8.Be2 h6 (8...Re8 9.0–0=) 9.0–0 Bg4 (9...Re8 10.Nc3=) 10.Nc3 Qc8 (10...Re8 11.d4=) 11.Qc2 (11.Nd5 Re8+=) 11...Bf3 (11...Qe6!?=) 12.Bf3+/– (12.gf3?! Qe6=) 12...Qd8 (12...Qd7 13.Nd5+/–) 13.Nd5 Qd7 (13...Re8 14.Nf6 Bf6 15.Be4+/–) 14.d4 (better is 14.Nf6 Bf6 15.Be4+/–) 14...e4? (better is 14...ed4!? 15.ed4 Nd5 16.Bd5 Bf6+/–) 15.Nf6+– Bf6 16.Be4 Qe7 17.b5 (17.Bf3 Rfe8+–) 17...ab5 (17...Na5 18.a4+–) 18.cb5 Nd8 19.Rac1 (19.Rfc1 Re8 20.Bf3 Rc8+–) 19...Ra5 (19...Re8 20.Bf3 Rc8 21.Qf5+–) 20.a4 (20.Qc7 Rb5 21.Qe7 Be7+–) 20...Ra8 (20...Re8 21.Bf3+–) 21.Bd5 (21.Ba3 c6 22.bc6 Nc6 23.Bc6 Rfc8+–) 21...c6 22.bc6 bc6 (22...Nc6 23.Qd1+–) 23.Bc6 Nc6 24.Qc6 Qe6 (24...Rfd8 25.Rc2+–) 25.Ba3 (better is 25.d5 Qe7 26.Bf6 Qf6 27.Rc4+–) 25...Qb3? (25...Rfd8 26.Bb4 Rac8+–) 26.Bd6 Qa4 (26...Rfd8 27.Rc4+–) 27.Qa4 Ra4 28.Bf8 Kf8 29.Rfd1 1–0. Wall,Bill – Tonn, internet, 2002.

6.d4 ed4 7.ed4 d5 8.Nf3= dc4 (8...Bd6 9.Ne5=) 9.Bc4 Ne4 (9...a5 10.Ne5 Ne5 11.de5 Qd1 12.Kd1+=) 10.0–0+= Bf5 11.Bd3 (11.d5 Ne7+/–) 11...Nd6 (11...Bd6!?=) 12.Re1+/– Be7 13.d5 Bd3 (13...Nb8 14.Bg7 Rg8 15.Bf6+–) 14.Qd3 (14.dc6?! Bb1 15.Rb1 0–0+/–) 14...Nb8 15.Bg7 +–. pierre – stan8049, itsyourturn.com, 2006.

6.d4 ed4 7.ed4 Qe7 8.Qe2 Qe2 9.Be2 Be7 10.Nf3 0–0+= 11.d5 Na7 12.Nbd2 Bd7 13.0–0 b5 14.Nb3 bc4 15.Bc4 Bb5 16.Bb5 Nb5 17.a4 Na7 18.Rfe1 Nd5 19.Rad1 c6 (19...Bf6 20.Rd5 Bb2+=) 20.Rd5 cd5+= 21.Re7 Nc6 22.Rd7 Rfd8?!+/– (22...Nb4 23.Rd6 Nd3 24.Bd4 Rfd8+=) 23.Rd8 Rd8 24.b5 ab5 25.ab5 Ne5 (25...Ne7!?) 26.Ne5 de5 27.Be5 Re8 28.Bc3 Rc8 29.Bd4?! (29.Be1!?) 29...Rc4! 30.b6? (30.Be5=) 30...Rb4!–/+ 31.Kf1 Rb3 32.Bc5 f6 33.Ke2 Kf7 34.Kd2 Ke6 35.Kc2 Rb5 36.Bd4 Kd6 37.Kd3 Kc6 38.g3 Rb3 39.Kc2 Rb6! (39...Ra3 40.h4 h5) 40.Bb6 Kb6–+ 41.Kd3 Kc6 42.Kd4 Kd6 43.f3 h6 44.h3 g5 45.h4?? gh4! 46.gh4 Ke6 47.Ke3 Ke5 48.f4 Kf5 49.Kd4 Kf4 50.Kd5 f5 51.Kd4 Kf3 52.Ke5 Kg4 53.h5 f4 54.Ke4 f3 55.Ke3 Kg3! 56.Kd3 f2 57.Ke2 Kg2 58.Kd3 f1Q 0–1. Dechamps,Benny – Jespers,Jan, Interclub, 2000.

6.d4 ed4 7.ed4 Qe7 8.Ne2=.

6.d4 ed4 7.ed4 Be7 8.Nf3 0–0 9.Bd3 Bg4 10.0–0 d5 11.c5 b6 12.Nbd2 a5 13.b5 Na7 14.c6 Nc8 15.Qc2 Nd6 16.Ne5 Be6 17.a4 Qc8 18.Ba3 Re8 19.Rfe1 Nf5 20.Be7 Re7 21.Ndf3 Qe8?? (better is 21...Nd6+/–) 22.Bf5+– Bf5 23.Qf5 Nd7 (23...Rd8+–) 24.cd7 Qf8 25.Nc6 Re1 26.Re1 g6 27.Qf6 Qd6 (27...h6 28.Ne7 Qe7 29.Re7 Rf8 30.d8R Rd8 31.Qf7 Kh8 32.Qg7) 28.Ne7 (28.Re8 Re8 29.de8Q Qf8 30.Ne7) 28...Kf8 (28...Qe7 29.Re7 Rf8 30.Rf7 Rf7 31.d8Q Rf8 32.Qdf8) 29.Qh8 1–0. Hechtlinger,John (2155) – Aragons,Domingo, Internet Section, 2003.

6.d4 ed4 7.ed4 Be7 8.Nf3 0–0 9.d5 Na7 10.Bd3 b5 11.0–0 bc4 12.Bc4 Bd7 13.Ba6 Bb5? (better is 13...c6 14.Nc3 Qb6+/–) 14.Bb5+– Nb5 15.Qd3 Rb8 16.a4 Na7 17.Ng5 h6 18.Bf6 hg5 19.Bc3 Bf6 20.b5 Nc8 21.Re1 Nb6 22.a5 Nc8 23.Bf6 Qf6 24.Nc3 Ne7 25.a6 Rb6 (25...Ng6+–) 26.Qc4 Rc8 (26...Rbb8 27.Qc7 Ng6+–) 27.a7 Ra8 (27...c5 28.a8Q Ra8 29.Ra8 Kh7 30.Qg4+–) 28.Qc7 Nc8 (28...Qd4 29.Re7 Rb5+–) 29.Re8 Kh7 30.Rc8 Rc8 31.Qc8 Rb5 32.Qh3 Kg6 33.g4 Qd4 1–0. orane (2210) – Gurky2, Live Game Caissa's Web, 2004.

6.Ne2 Be6 7.Ng3 +=.

6.Ne2 g6 7.Ng3= Bg7 8.Qc2 0–0 9.Be2 Bd7 10.Nc3 Re8 11.d3 Na7 12.0–0 b5 13.Bf3 Rb8 14.c5 (14.Nd5 Nd5 15.cd5 c6+=) 14...dc5 15.bc5 c6 (better is 15...Nc6!?=) 16.Rfd1+/– Bg4 17.Bg4 Ng4 18.h3 Nf6 19.Rd2 Qc7 20.Nce2 (20.Nge4 Nd5+=) 20...Rbd8+= 21.Rc1 Rd7 22.Rcd1 Red8 23.d4 ed4 24.Bd4 Nc8 25.Qb2 Ne8 26.Bg7 Ng7 27.e4 (27.Ne4 Ne8+=) 27...Ne7 (27...Ne6!?+=) 28.Rd7 Rd7 29.Rd7 Qd7 30.Qd4 Qd4 31.Nd4 Ne6 32.Ne6 fe6 33.Ne2 e5 34.Nc1 a5 (34...Kf7!?=) 35.Nd3+= a4 36.Kf1 Kg7 (36...g5 37.Ke2 Ng6 38.Kf3+=) 37.Ke2 (37.Ne5 b4 38.Nc4 ba3 39.Na3 g5+=) 37...Kf6= 38.g3 Ke6 (38...g5 39.Kf3=) 39.f4+= ef4 40.gf4 h6 41.Kf3 h5 42.Nb4 Kd7 43.Ke3 Ke6 44.Kd4 h4 (44...Kf6 45.Nc2+=) 45.Nd3 Ng8 46.Ne5 Ne7 (46...b4!? 47.ab4 a3+/–) 47.Nf3 g5 48.Ng5 Kf6 49.Nf3 Ng6 50.f5 Nf4 51.Nh4 Nh3? (51...Ne2!? 52.Kd3 Nc1 53.Kc3 Nb3+/–) 52.Nf3 (better is 52.e5!? Kg7 53.Ng6 Nf2+–) 52...Nf4+/– 53.Ne1 Ne2 54.Kd3 Nc1 55.Ke3 Nb3 56.Nd3 Kg5 57.Nb4 Nc5 58.Nc6 Nb7? (better is 58...Nd7+–) 59.Kd4 Kf6 60.Nb4 Nd8 (60...Kf7 61.e5 Na5 62.Kc5 Nb3 63.Kd6+–) 61.Nd5 Kf7 (61...Kg5 62.Kc5 Nf7 63.Nc3+–) 62.Kc5 Nb7 (62...Kf8 63.Kb5 Nf7 64.Ka4+–) 63.Kc6 Na5 (63...Nd8 64.Kb5 Kf8 65.Ka4+–) 64.Kb5 Nb3 65.Kc4 (65.Nc3 Nd4 66.Ka4 Kf6+–) 65...Nd2 66.Kd4 Nf3 67.Kc5 Ne5 68.Nc3 Nd3 (68...Nd7 69.Kd5 Nf6 70.Kd4+–) 69.Kd6 Nf2 (69...Nb2 70.e5 Nc4 71.Kd5 Ne3 72.Ke4 Ng4+–) 70.e5 Ng4 71.Nd5 Nh6 72.e6 Ke8 73.Nc7 Kd8 (73...Kf8 74.e7 Kg7 75.e8Q Nf5 76.Ke5 Nd6 77.Ne6 Kh6 78.Qh8 Kg6 79.Qg7 Kh5 80.Qg5) 74.e7 1–0. Engelhardt,Erhard (1845) – Grothe,Michael, Berlin GER, 2012.

6.Nf3 Be7 7.Be2 0–0 8.0–0 h6 9.d3 Re8 10.Nbd2 Bf8 11.Re1 Ne7 12.e4 Ng6 13.Qc1 c6 14.g3 (14.Qc2!?+=) 14...d5 15.cd5 cd5 16.Bf1 (16.d4!? de4 17.Ne5=) 16...d4+= 17.Nc4 Qc7 (17...b5 18.Na5–/+) 18.Qd1 (18.Nce5!? Qc1 19.Rac1 Re5 20.Bd4=) 18...b5–/+ 19.Ncd2 Bb7 (19...a5 20.ba5 Qa5 21.Qe2–/+) 20.Rc1 Qd7 21.Nb3 Be7 22.Nc5 Bc5 23.Rc5 Rac8 24.Qc2 Qg4 25.Bg2 Nd7 26.Rc7 Rc7 27.Qc7 Bc6?? (better is 27...Bc8+=) 28.Qc6+– Ne7 (28...Qe6 29.Rc1+–) 29.Qa6 f5 (29...Rb8+–) 30.ef5 (better is 30.Qe6 Kf8 31.Qd7 Qh5 32.Qb5 Ng6+–) 30...Nf5 (30...Qf5 31.Nh4 Qf6 32.Qb5+–) 31.Qb5 (31.Re4!? Qh5 32.g4 Qf7 33.gf5 Qf5 34.Nd4 Qf7 35.Nb5 Rf8+–) 31...Re7 32.Qc4 Kh7 33.b5 Nb6 (33...Qh5 34.a4+–) 34.Qb4 e4 (34...Nd5 35.Qc5 Nf6 36.Re5 Re5 37.Qe5+–) 35.de4 Re4 (35...d3 36.h3 Qh5 37.ef5 Re1 38.Ne1+–) 36.Re4 Qe4 37.Nd4 (better is 37.Ng5! hg5 38.Be4 g6 39.Bf5 gf5 40.Qd4 Kg6 41.Qg7 Kh5 42.Qh7 Kg4 43.Kg2 Nc4 44.h3) 37...Qb1 38.Bf1 Nd5 39.Qd2 Nf6 (39...Nd4 40.Qd4 Nf6 41.b6+–) 40.Nf5 Ne4 41.Qc1 (41.Qc1 Qc1 42.Bc1+–) 1–0. Fournier,Frederic (1740) – TIAZULMI, Active, 2008.

6.Nf3 Bg4 7.d3 g6 (7...Be7 8.Be2=) 8.Be2 Bg7 9.Nbd2 (9.0–0 0–0=) 9...0–0 10.0–0 Re8 (10...h6 11.d4=) 11.Ng5 (11.h3 Bd7=) 11...Be2 (11...Bd7 12.Nge4=) 12.Qe2 Nh5 (12...d5 13.Nb3=) 13.Nge4 f5 14.Nc3 f4 (14...Nf6 15.Nd5=) 15.Nce4 (15.Nde4 Rf8+=) 15...Rf8 16.Qg4 (16.Nf3 Qd7+=) 16...Ne7 (16...Qc8 17.Qh4=) 17.Ng5 (17.Qe6 Kh8+=) 17...Qc8 18.Qe6 Qe6 19.Ne6 Rfc8 (19...Rf6 20.Ng7 Ng7 21.Ne4+=) 20.d4 (20.g4 fg3 21.hg3 Bf6+/–) 20...fe3 21.Ng7 ef2 (21...Ng7 22.fe3 ed4 23.Bd4+=) 22.Rf2 Ng7 23.de5 de5 24.Be5 c5 (better is 24...Nc6!? 25.Nf3 Ne5 26.Ne5 Rf8+=) 25.Bd6+– Nef5 26.Bc5 Ne6 27.Bb6 Rc6 28.c5 Ned4 (28...Ne3 29.Ne4+–) 29.Nc4 Re6 30.h3 (30.g4 Ne3 31.Ne3 Re3+–) 30...h5 (30...Rae8 31.g4 Nh4 32.Kh2+/–) 31.Rd1 Re4 (better is 31...Rae8+–) 32.Nd6 Re7 (32...Re6 33.Nb7 Rb8 34.Nd6+–) 33.Rfd2 (better is 33.g4!? hg4 34.hg4 Ne2 35.Re2 Re2 36.gf5 gf5 37.Nb7 Rf8+–) 33...Ne2 34.Kh2 Nfg3 (34...Nc3 35.Nf5 gf5 36.Rd7+–) 35.Nc4 (35.Rd3 h4 36.Rf3 Kg7+–) 35...Rf8 (35...Re4 36.Rd8 Rd8 37.Rd8 Kg7 38.Rd7 Kh6 39.Nd2+–) 36.Rd8 (36.c6!? bc6 37.Bc5 Re4 38.Bf8 Kf8+–) 36...Ree8 (36...Rd8!? 37.Rd8 Kg7+/–) 37.Re8+– Re8 38.Rd8?? (better is 38.Bc7 h4 39.Be5+–) 38...Rd8 39.Bd8 Nf1 40.Kh1 Nfg3 ½–½. Schmidbauer,Josef – Dadlhuber,Thomas, Nord Bayern–ch, 2001.

6.Nf3 Bg4 7.Be2 e4 8.Nd4 Be2 9.Nc6 Bd1 10.Nd8 Rd8 11.Bf6 gf6 12.Kd1=.

6.Nf3 Bg4 7.Be2 Be7 8.h3 Bh5 9.d3 0–0 10.Nbd2 b5 (10...Re8 11.0–0=) 11.0–0 bc4 12.dc4 (12.Nc4 Qe8 13.Rc1+=) 12...e4 (12...Rb8 13.Bc3=) 13.Nd4 (13.Ng5!? Bg6 14.Qc2+/–) 13...Nd4 14.Bd4 Be2 15.Qe2 d5 (15...a5 16.b5+=) 16.Rac1 (16.Rad1 Re8 17.f3 ef3 18.Qf3 a5+=) 16...c6 (16...a5 17.cd5 ab4 18.ab4 Nd5 19.Ne4 Bb4 20.Qg4+=) 17.cd5 cd5 18.Bc5 (18.Nb3 Qd7+=) 18...Bc5 19.Rc5 Rc8 20.Qa6 Rc5 (20...Ra8!? 21.Qb7 Ra3=) 21.bc5+/– Qc7 22.Qb6 Qb6 (better is 22...Qd7!?+/–) 23.cb6+– Rb8 24.Rb1 Nd7 25.f3?? (25.b7!? Kf8+–) 25...ef3 (25...Rb6 26.a4 Rb1 27.Nb1 ef3 28.gf3+/–) 26.Nf3 (26.b7 fg2 27.a4+/– (worse is 27.Kg2 Kf8+/–)) 26...Rb6= (worse is 26...Nb6 27.Rb5+/–) 27.Rc1 f6 28.Nd4 Ra6 29.Rc8 (29.Rc7 Ne5+=) 29...Kf7= 30.Rc7 Ke7 (30...Ke8 31.Nb5=) 31.Nb5 (31.Nc6 Kd6 32.Rd7 Kc6 33.Rg7 Ra3+=) 31...Rb6 32.a4 Ra6 33.Ra7 Ra7 34.Na7 Nc5 35.Nc6 (35.a5 Kd7 36.Nb5 Kc6 37.Nd4 Kb7+=) 35...Kd7 36.Nb4 Na4 37.Nd5 Kd6 38.Nb4 Nc3 39.Kf2 Ne4 (39...Kc5 40.Nc2+=) 40.Kf3= Nd2 41.Kf4 Ke6 42.e4 h5 43.g3 g5 44.Ke3 Nf1 45.Kf2 Nd2 46.Ke3 Nc4 47.Kf3 Ke5 48.Nc6 Kd6 49.Nb4 Ne5 50.Ke3 Ke6 51.Nd3 Nd3 52.Kd3 f5 53.ef5 Kf5 54.Ke3 g4 55.h4 Ke5 56.Kd3 Kd5 57.Ke3 ½–½. GuestLJNY – GuestTQQK, freechess.org, 2017.

6.Nf3 Bg4 7.Be2 Bf3 8.Bf3+= e4 9.Be2 Ne5 (9...a5 10.b5 Ne5 11.0–0+=) 10.d4 (10.0–0 Qe7+=) 10...Ned7 (10...ed3 11.Bd3 Nd3 12.Qd3+=) 11.0–0 (11.Nc3 a5+/–) 11...Be7 (11...d5 12.Nd2+/–) 12.Qc2 (12.Nc3 c6+/–) 12...0–0 (12...c6!?+=) 13.Nd2+/– h6 (13...d5 14.cd5 Re8 15.Ne4 Ne4 16.Qe4 Bb4 17.Qf5+/–) 14.Ne4+– Ne4 (14...Re8 15.Nf6 Nf6 16.e4+–) 15.Qe4 c6 1–0. GuestJBLJ – GuestCFNX, freechess.org, 2016.

6.Nf3 Bg4 7.Be2 g6 8.h3 Bf5 9.d4 ed4 10.ed4 Bg7 11.d5 Ne5 (11...Ne7 12.g4 Bd7 13.g5+=) 12.Nd4 (12.Ne5 de5 13.Be5 Qe7+/–) 12...c5 (12...Bc8!?+=) 13.Nf5 gf5 14.0–0 Ne4 15.Nd2 (15.bc5 dc5 16.Qc2 0–0+/–) 15...Qd7 (15...0–0!?+/–) 16.f4+– Ng6?? (better is 16...Nf3 17.gf3 Bb2 18.fe4 fe4+–) 17.Bg7 Rg8 18.Ne4 fe4 19.Bf6 Qf5 20.Bg5 Rh8 (20...Qc8+–) 21.Bg4 Qg4 22.hg4 (22.Qg4 h5 23.Qf5 cb4+–) 22...h6 23.Bf6 Rh7 24.bc5 dc5 25.d6 Kd7 26.Qd5 Nf8 27.Qb7 Kd6 28.Rad1 Ke6 29.Qc6 1–0. bihyjt – ttban, internet, 2017.

6.Nf3 g6 7.d4 ed4 8.Nd4 Nd4 9.Bd4 Bg7 10.Be2 0–0 11.Nc3 b6 (11...Re8 12.0–0+=) 12.Bf3 Rb8 13.0–0 (13.Nd5 Nd7+=) 13...Bb7 14.Bb7+/– Rb7 15.Qf3 Rb8 16.b5 (16.Nd5 Nd7+/–) 16...a5 (16...Ra8 17.Rfb1+=) 17.Rfd1+/– Nh5 (17...Nd7 18.Bg7 Kg7 19.Nd5+/–) 18.Nd5 (18.Rac1 Re8+/–) 18...Bd4 (18...f5 19.Bg7 Ng7 20.Ra2+/–) 19.ed4 Rc8 (19...Kg7!?+/–) 20.Re1+– Re8? (better is 20...Kh8+–) 21.Re8 Qe8 22.g4 c6 (22...Qe6 23.gh5 Kg7 24.Kf1+–) 23.bc6 (23.gh5 cd5 24.Qd5 Qe2 25.hg6 hg6=; 23.Nb6 Rb8 24.Qc6 Qe6 25.gh5 Qg4 26.Kf1 Qd4+–) 23...Qc6 (23...Kg7 24.gh5 Qd8 25.hg6 hg6+–) 24.Ne7 (24.Ne7 Kg7 25.Nc6+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

4.c4 Bd7

5.a4 Nc6 6.b5 ab5 7.ab5 Ra1 8.Ba1 Nce7 9.d4 Ng6 10.Nf3 e4 11.Nfd2 Nf6 (11...f5 12.Nc3 Nh6 13.f3 ef3 14.Qf3 c6+=) 12.Nc3 c6 (12...Bf5 13.Qc2 d5 14.Nd5 Nd5+=) 13.Nde4 Ne4 14.Ne4 d5 (14...cb5+/–) 15.Nc3 Qa5 16.c5 (16.cd5?! Bb4 17.Qc1 cd5=) 16...cb5 17.Qb1 Be7 18.Be2 b4 19.Nd5 0–0? (better is 19...Bc6 20.e4 b6 21.Ne7 b3 22.Kd1 Ne7+/–) 20.0–0+– (20.Nb4?! b6 21.Bc3 bc5+/–; worse is 20.Ne7 Ne7 21.0–0 b6+–) 20...Bc6 21.Nb4 Qc7 (21...Ra8 22.Nc6 bc6 23.Qb7+–) 22.d5 (22.Nc6?! bc6 23.Qf5 Rd8+–) 22...Bd5 (22...Bd7 23.d6 Bd6 24.cd6 Qd6 25.Rd1+–) 23.Nd5 Qc5 24.Qb2 f6 25.Qb7 Bd6 26.Bd4 Qc8 (26...Qc2 27.Qa6 Rd8 28.Nf6 gf6 29.Bf6+–) 27.Nf6! gf6 (27...Rf6 28.Qc8) 28.Qd5 (28.Qd5 Kg7 29.Qd6+–) 1–0. pierre – praitsin, internet, 2008.

5.a4 Nf6 6.Nf3 Be7 7.Be2 0–0 8.b5 ab5 9.ab5 Ra1 10.Ba1 c6 11.0–0 cb5 12.cb5 Bg4 13.h3 Bh5 14.Nc3 e4 15.Nd4 Bg6 16.d3 d5 17.de4 de4 18.Bb2 Nbd7 19.Qc2 Qc7 20.Rc1 Rc8 21.Na4 Qc2 22.Rc2 Rc2 23.Nc2 Kf8 24.Kf1 Nd5 25.Bc4 N5f6 26.Ke2 h5 27.Bd4 Ne8 28.Kd2 Nef6 29.Kc3 Ke8 30.Nb4 Bd6 31.Nd5 White intends b6 31...Kd8 32.Nf6 gf6 33.Bd5 Kc7 34.b6 Kb8 35.Kc4 Ne5 36.Be5 Be5 37.Nc5 Bh2 (37...Bd6+–) 38.Nd7 (better is 38.Nb7 Bf5 39.Nc5+–) 38...Kc8 39.Nf6 Bg1 40.Be4 Bf2 41.Bg6 fg6 42.Kd4 Be1 43.Ke5 Kd8 44.Ke6 g5 45.g4 hg4 46.hg4 (46.Ng4?! Ba5+–) 46...Bh4 47.Nd5 Be1 48.e4 Bf2 49.Kf5 Bh4 50.e5 Bg3 51.e6 1–0. Stecyk,Jozef (1730) – Sukta,Stanislaw, 55 Ogolnopolski Turniej Szachowy Zamosc Poland, 2013.

5.Nc3 Nf6 6.d4 (6.Nf3 Nc6=) 6...ed4+= 7.ed4 Be7 8.Nf3 0–0 (8...d5 9.a3=) 9.Bd3 (9.d5 a5 10.ba5 Ra5=) 9...Nc6 (9...d5 10.a3=) 10.a3= Bg4 11.h3 Bf3 (11...Bh5 12.g4 Bg6 13.Bg6 fg6 14.Qe2=) 12.Qf3 Nd4 (12...a5 13.Nd5 ab4 14.Nb4 Nb4 15.ab4=) 13.Qb7+= c6 (13...a5 14.Nd5 Ne6 15.0–0+=) 14.0–0+/– Nd7 (14...a5 15.Rae1 Re8 16.Ne4+/–) 15.Nd5 (15.Ne4 c5 16.Bd4 cd4 17.Rfd1+/–) 15...Ne6? (better is 15...cd5 16.Bd4 dc4 17.Bc4 a5+/–) 16.Qc6+– g6?? (16...Ne5 17.Be5 de5+–) 17.Qa8 Qa8 (17...Nc7 18.Qd8 Bd8+– (18...Rd8?? 19.Nc7 Ne5 20.Be2+–)) 18.Ne7 1–0. Wall,Bill – Wersaci, internet, 2005.

5.d4 c6 6.de5+= de5 7.Be5 Bb4= 8.Nd2 f6 9.Bb2 Be6 10.c5 Bd2 11.Qd2= Qd2 12.Kd2 Nd7 13.Rc1 Ba2=+ 14.Nf3 0–0–0 15.Be2? Nc5–+ 16.Nd4? Nb3 17.Kc2 Nc1 18.Rc1 Bd5 19.f3 Nh6 20.e4 Bf7 21.g4 Rd7 22.Bd3 Rhd8 23.Nc6 bc6 24.Ba6 Kc7 25.g5 Ng8 26.f4 Rd2 27.Kb1 Rh2 28.e5 fg5 29.fg5 Rb8 30.Rf1 Rbb2 31.Kc1 Rhc2 32.Kd1 Bh5 33.Be2 Be2 34.Ke1 Bf3! (34...Bf3 35.Rf3 Rc1) 0–1. bentengutama – catalinpv (1645), net–chess.com, 2002.

5.Nf3 Be7 6.Nc3 (6.Be2 Nf6=) 6...Nf6 7.a4 (7.d4 ed4 8.Nd4 c5=) 7...a5 (7...0–0 8.Be2=) 8.b5 0–0 (8...Bf5 9.d4 Nbd7 10.Be2=) 9.h3 (9.d4 ed4 10.Qd4 Be6=) 9...Be6 (9...c6 10.Bd3=) 10.Be2 Nbd7 11.d4 e4 (11...Rb8 12.0–0=) 12.Nd2+= d5 13.cd5 Nd5 14.Nce4 (14.Nde4 f5 15.Nd2 Bb4 16.Nd5 Bd5+/–) 14...Bf5 (14...f5 15.Nc3+/–) 15.Ng3 (15.0–0 Re8+/–) 15...Bg6 16.0–0 (16.e4 Nf4 17.0–0 Bb4+/–) 16...N7f6 (16...Bb4 17.Nf3+/–) 17.Nc4 (17.e4 Nf4+/–) 17...Ne4 (17...Re8 18.Ne5+/–) 18.Ne4 Be4 19.Bf3 Bd3?? (better is 19...Nf6+/–) 20.Qd3+– Nb4 (20...c6 21.bc6 bc6 22.Rab1+–) 21.Qe4 b6 (21...Ra7 22.d5 Bc5 23.Rad1+–) 22.Qg4 (better is 22.Qa8!? Qa8 23.Ba8 Ra8+–) 22...Rc8 (22...f5 23.Qg3 Rc8 24.Bb7+–) 23.Ne5 (better is 23.Be4 Re8+–) 23...Bf6 (23...f5 24.Qf4+–) 24.Rfd1 (24.Nd7 c5 25.Nf8 Qf8+–) 24...Nc2 (24...Qd6 25.Rac1+–) 25.Rac1 Nb4 26.d5 (better is 26.Nd7!? Re8 27.Bb7 Rb8 28.Nb8 Qb8+–) 26...Na2 (26...Qd6 27.Nc4 Qd8 28.d6 Bb2 29.Nb2 cd6 30.Rc8 Qc8 31.Nc4+–) 27.Rc4 (27.Nc6 Qd6 28.Bf6 Qf6+–) 27...Re8 (27...Nb4 28.Rf4 Be5 29.Be5+–) 28.Nc6 Qd6 29.Bf6 Qf6 30.Rf4 (better is 30.d6 cd6 31.Ne7 Qe7 32.Rc8 Rc8 33.Qc8 Qf8 34.Qc7+–) 30...Qb2 (30...Qd6 31.Qf5 Rf8 32.Rc4+–) 31.Qd7 (31.Ne7 Kh8 32.Rf7 Qe5 33.Nc8 Rg8+–) 31...f6 (31...Kh8+–) 32.Ne7 Re7 33.Qc8 Kf7 34.d6 Qc2 (34...Qf2 35.Kf2 Nc3 36.de7 Nd1 37.Bd1 Ke7 38.Re4 Kd6 39.Qe6 Kc5 40.Rc4) 35.de7 1–0. DEFFM – GuestFLYS, freechess.org, 2016.

5.Nf3 Nf6 6.a4 Be7+= (6...c5 7.bc5 e4 8.c6 Nc6 9.Nd4 d5+=; 6...e4 7.Nd4 Be7 8.d3 d5 9.Ba3 Bg4=) 7.Qc2 (7.Nc3 Bf5 8.Be2 Nc6 9.b5 Nb4=) 7...0–0 8.Nc3 (8.Be2 e4 9.Ng5 d5+=) 8...Ne8 (8...Nc6!? 9.b5 Nb4+=) 9.d4 (9.Nd5 c6=) 9...ed4 (9...Nc6 10.Nd5 ed4 11.Nd4=) 10.Nd4 Bf6 (10...c5 11.bc5 dc5 12.Nf3+=) 11.b5 (11.Bd3 Bd4 12.ed4 Qh4+=) 11...Bd4= 12.ed4 ab5 (12...Qh4 13.Bd3=) 13.ab5+= Ra1 14.Ba1 c6 (14...Nf6 15.Be2+=) 15.Be2 cb5 16.cb5 Nf6 17.0–0 Qb6 18.Bf3 Rc8 (18...Bb5? 19.Qb1 (19.Nb5?! Qb5 20.Qb1 Qg5=) 19...Nc6 20.Nb5+–) 19.Qd3 d5 (19...Re8 20.Rc1+=) 20.Re1 (20.Nd5!? Nd5 21.Bd5 Qb5 22.Qf3+/–) 20...Be6 21.Bb2 Nbd7 22.g3 (22.Bc1 Qc7 23.Bd2 Nb6=) 22...g6 (22...Qa5 23.Re2=) 23.Ra1 Bf5 24.Qe2 Re8 25.Qd1 Ne4 26.Qb3 Nc3 27.Bc3 Be4 28.Be2 (28.Re1 Nf6 29.Bd1 Rc8=) 28...Qf6 ½–½. Sternik,Ryszard – Janton, Olsztyn, 1966.

5.Nf3 Nf6 6.Be2 Be7 7.d3 0–0 8.Nbd2 c6 9.0–0 h6 10.a4 a5 11.b5 c5 12.Qc2 Nh7 13.h3 f5 14.Rfd1 Qc7 15.d4 e4 16.Ne1 b6 17.dc5+– dc5 18.Bf1 Be6? 19.g3 Nd7 20.Ng2 g5 21.Qc3 Bf6=+ 22.Qc2 Rad8 23.Nb1 Ne5–/+ 24.Nc3 Nf3 25.Kh1 Be5 26.Ne2 Bb2–/+ 27.Qb2 Bc4 28.Qc3 Be6 29.Ne1 Ne5 30.Bg2 Bc4 31.Ng1 g4 32.h4 Nf3?? 33.Nef3 gf3 34.Bh3?? Bd3 35.Bf1 c4 36.Nh3 Qf7 37.Nf4–/+ Qg6?? 38.Ng6+– Rf6 39.Nf4 Rfd6 40.Bd3 cd3 41.Rd2 Nf6 42.Rc1 Ng4 43.Kg1 Kf8 44.Qh8 Ke7 45.Rc7 R8d7+– 46.Qh7 Kd8 47.Rd7 Rd7 48.Qf5 Rc7 49.Ne6 (49.Ne6 Ke7 50.Nc7+–; 49.Qf8 Kd7 50.Nd3 ed3 51.Rd3 Ke6 52.Rd6 Ke5 53.Qf4#) 1–0. uno (1910) – fratio (1845), ICC, 2003.

4.c4 Nd7

5.a3 a5 A) 6.Bd3 ab4 (6...Ngf6 7.Nc3 Nb6 8.Nf3 Qe7 9.e4 Nh5 10.g3 g6; 6...Nb6 7.Nc3 Nf6 8.Nf3 Qe7 9.e4 Nh5 10.g3 g6) 7.ab4 Ra1 8.Ba1 b5 9.Nc3 bc4 10.Bc4 Nb6; B) 6.Nf3 e4 (6...ab4 7.ab4 Ra1 8.Ba1 e4 9.Nd4 Ne5 10.Nc3 Nf6; 6...Ngf6 7.Nc3 b6 8.Be2 Be7 9.0–0 0–0 10.Qc2 Bb7) 7.Nd4 ab4 8.ab4 Ra1 9.Ba1 Ne5 10.Be2 Nf6; C) 6.Nc3 Ngf6 (6...Nb6 7.c5 ab4 8.ab4 Ra1 9.Qa1 dc5 10.bc5 Bc5; 6...Ne7 7.Nf3 g6 8.d4 Bg7 9.Bd3 0–0 10.0–0 ed4) 7.Nf3 Nb6 8.Bd3 Qe7 9.Ng5 h6 10.Nge4 Ne4.

5.a3 b6 A) 6.Nc3 Bb7 (6...Ngf6 7.Be2 Bb7 8.Nf3 e4 9.Nd4 c5 10.bc5 dc5) 7.Nf3 Ngf6 8.Be2 g6 9.0–0 Bg7 10.d4 0–0; B) 6.Nf3 e4 7.Nd4 c5 8.Ne2 Ne5 9.Ng3 f5 10.d4 cd4; C) 6.Be2 Ngf6 (6...Bb7 7.Nf3 e4 8.Nd4 c5 9.Nf5 Qg5 10.Ng3 Ngf6; 6...Be7 7.Nc3 Ngf6 8.Bf3 Rb8 9.Bc6 Bb7 10.Bb7 Rb7) 7.Nc3 Bb7 8.Nf3 e4 9.Nd4 Ne5 10.f4 ef3; D) 6.Qc2 Bb7 (6...Ngf6 7.Nc3 Bb7 8.Nf3 g6 9.Bd3 Bg7 10.0–0 0–0; 6...a5 7.Nf3 Ngf6 8.Nc3 Bb7 9.Be2 Be7 10.0–0 0–0) 7.Nc3 Ngf6 8.Nf3 g6 9.Be2 Bg7 10.0–0 0–0.

5.a3 Nb6 A) 6.Qc2 a5 (6...Nf6 7.Nf3 Be7 8.Bd3 0–0 9.Nc3 h6 10.c5 Nbd5; 6...Be7 7.Bd3 Nf6 8.Nf3 h6 9.c5 Nbd5 10.Nc3 0–0) 7.Nf3 Nf6 8.Bd3 Be6 9.Ng5 Bd7 10.Nc3 h6; B) 6.d4 ed4 (6...Be6 7.de5 de5 8.Nd2 f6 9.c5 Nd5 10.Bc4 b5; 6...e4 7.Nd2 Nf6 8.Qc2 Be7 9.Ne2 a5 10.Nc3 0–0) 7.Bd4 Nf6 8.Nd2 c5 9.Bc3 d5 10.Ngf3 Be6; C) 6.Qb3 Nf6 (6...Bf5 7.Nc3 Nf6 8.Nf3 Be7 9.Be2 0–0 10.0–0 Qd7; 6...a5 7.Nf3 Nf6 8.Nc3 Bf5 9.Be2 Be7 10.0–0 a4) 7.Nc3 Bf5 8.Nf3 Be7 9.Be2 0–0 10.0–0 Qd7; D) 6.Nc3 Be6 (6...Nf6 7.Nf3 Be7 8.c5 dc5 9.bc5 Bc5 10.Ne5 Bd6; 6...Bf5 7.Nf3 Nf6 8.c5 dc5 9.Ne5 Bd6 10.Qf3 Be6) 7.Qb3 Qd7 8.Nf3 Qc6 9.d3 Be7 10.Be2 Nf6.

5.a3 Be7 A) 6.Nf3 Ngf6 (6...Nh6 7.Nc3 0–0 8.Be2 Nf6 9.0–0 Bd7 10.d4 ed4; 6...Nb6 7.Nc3 Nf6 8.d4 e4 9.Ng5 0–0 10.c5 Nbd5) 7.Nc3 0–0 8.Bd3 Nb6 9.Qe2 h6 10.0–0 Be6; B) 6.Bd3 Ngf6 (6...Nb6 7.Nf3 Nf6 8.Qc2 0–0 9.Nc3 g6 10.Qb3 Bg4; 6...h6 7.Nf3 Ngf6 8.Nc3 Nb6 9.0–0 Be6 10.Qe2 0–0) 7.Nc3 0–0 8.Nf3 Nb6 9.Qb3 h6 10.0–0 Be6; C) 6.Qc2 a5 (6...Ngf6 7.Nf3 Nb6 8.Bd3 0–0 9.Nc3 g6 10.Qb3 Bg4; 6...Nb6 7.Nf3 Nf6 8.Bd3 0–0 9.Nc3 g6 10.Qb3 Bg4) 7.Nc3 ab4 8.ab4 Ra1 9.Ba1 Ngf6 10.Nf3 c5; D) 6.Nc3 Ngf6 (6...Nb6 7.Nf3 Nf6 8.d4 e4 9.Ng5 0–0 10.Be2 a5; 6...h6 7.Nf3 Ngf6 8.d4 b6 9.Bd3 Bb7 10.d5 0–0) 7.Nf3 0–0 8.Bd3 Nb6 9.Qb3 h6 10.a4 a5.

5.Qa4 A) 5...Be7 A1) 6.Nc3 Nh6 (6...Ngf6 7.Bd3 0–0 8.Nf3 a5 9.b5 Nc5 10.Qc2 a4; 6...a5 7.Nf3 Ngf6 8.a3 0–0 9.Qb3 ab4 10.ab4 Ra1) 7.Nf3 0–0 8.Bd3 Nb6 9.Qb3 Bf5 10.Bf5 Nf5; A2) 6.Bd3 Ngf6 (6...a5 7.Nc3 Ngf6 8.a3 0–0 9.Qc2 ab4 10.ab4 Ra1) 7.Nc3 0–0 8.Qc2 a5 9.a3 ab4 10.ab4 Ra1; A3) 6.Be2 Ngf6 (6...a5 7.Nc3 Ngf6 8.a3 0–0 9.Nf3 Nb6 10.Qb3 ab4) 7.Nc3 0–0 8.Nf3 a5 9.a3 Nb6 10.Qb3 ab4; A4) 6.Nf3 Ngf6 (6...a5 7.Nc3 Ngf6 8.a3 0–0 9.Qc2 Nb6 10.Bd3 ab4; 6...Nh6 7.Nc3 0–0 8.Bd3 Nb6 9.Qc2 Be6 10.Nd5 f5) 7.Nc3 0–0 8.Qb3 a5 9.a3 b6 10.Be2 ab4; B) 5...a5 B1) 6.Nc3 Be7 (6...Ngf6 7.Nf3 Be7 8.a3 0–0 9.Qb3 ab4 10.ab4 Ra1) 7.Nf3 Ngf6 8.a3 0–0 9.Qb3 ab4 10.ab4 Ra1; B2) 6.a3 Ngf6 (6...Be7 7.Nf3 Ngf6 8.Nc3 0–0 9.Qb3 ab4 10.ab4 Ra1; 6...c6 7.Nf3 Nb6 8.Qb3 Nf6 9.Nc3 Bf5 10.Nh4 Be6) 7.Nc3 Be7 8.Nf3 0–0 9.Qb3 ab4 10.ab4 Ra1; B3) 6.h3 Ngf6 (6...Be7 7.a3 Ngf6 8.Nf3 0–0 9.Nc3 Nb6 10.Qb3 e4; 6...b6 7.Nf3 Bb7 8.b5 Nc5 9.Qc2 Nf6 10.Nc3 Qd7) 7.Nc3 Be7 8.Nf3 0–0 9.a3 Nb6 10.Qb3 e4; B4) 6.Nf3 Be7 (6...Ngf6 7.Nc3 Be7 8.a3 0–0 9.Qb3 ab4 10.ab4 Ra1) 7.Nc3 Ngf6 8.a3 0–0 9.Qc2 Nb6 10.Bd3 ab4; C) 5...Ne7 C1) 6.Nf3 Nc6 (6...g6 7.Bd3 Bg7 8.Nc3 0–0 9.0–0 a5 10.a3 Nf6; 6...c5 7.a3 f5 8.Nc3 Nc6 9.h4 Be7 10.Nd5 0–0) 7.Nc3 Nb6 8.Qb3 Bf5 9.e4 Be6 10.Nd5 Be7; C2) 6.Nc3 g6 (6...Nc6 7.Nd5 Nb6 8.Nb6 cb6 9.b5 Na5 10.ba6 Nc6; 6...c5 7.a3 f5 8.Nf3 Nc6 9.h4 Be7 10.Nd5 0–0) 7.Nf3 Bg7 8.h4 0–0 9.h5 gh5 10.Bd3 Nf6; D) 5...h6 D1) 6.Nf3 Ngf6 (6...Be7 7.Nc3 Ngf6 8.Bd3 0–0 9.Qb3 a5 10.a3 Nb6) 7.Nc3 Be7 8.Bd3 0–0 9.Qb3 a5 10.a3 Nb6; D2) 6.Bd3 Ngf6 (6...Be7 7.Nf3 Ngf6 8.Nc3 0–0 9.Qb3 a5 10.a3 Nb6; 6...b5 7.cb5 Bb7 8.Kf1 ab5 9.Qb3 Ngf6 10.Nc3 c6) 7.Nc3 Be7 8.Nf3 0–0 9.Qb3 a5 10.a3 Nb6; D3) 6.Be2 Ngf6 (6...Be7 7.Nf3 Ngf6 8.Nc3 0–0 9.Qc2 a5 10.b5 Nc5) 7.Nc3 Be7 8.Nf3 0–0 9.0–0 e4 10.Nd4 Nb6; D4) 6.Nc3 Ngf6 (6...Be7 7.Bd3 Ngf6 8.Nf3 0–0 9.Qb3 a5 10.a3 Nb6) 7.Nf3 Be7 8.Bd3 0–0 9.0–0 a5 10.a3 ab4; E) 5...Ngf6 E1) 6.Be2 a5 (6...Be7 7.Nc3 0–0 8.Nf3 a5 9.a3 Nb6 10.Qb3 ab4) 7.Nc3 Be7 8.Nf3 0–0 9.a3 Nb6 10.Qb3 ab4; E2) 6.Nh3 a5 (6...Be7 7.Nc3 0–0 8.Bd3 a5 9.a3 Nb6 10.Qb3 Bh3; 6...h6 7.Nc3 Be7 8.Qb3 0–0 9.Bd3 a5 10.a3 ab4) 7.Bd3 c6 8.0–0 Nb6 9.Qb3 ab4 10.a3 Bh3; E3) 6.Nc3 Be7 (6...a5 7.Nf3 Be7 8.Bd3 0–0 9.a3 ab4 10.Qa8 bc3; 6...c6 7.Nf3 a5 8.Be2 Nb6 9.Qb3 ab4 10.Qb4 e4) 7.Nf3 0–0 8.Bd3 Nb6 9.Qb3 a5 10.a3 h6.

5.Qb3 c5 6.a3 (6.Nc3 Ngf6 7.Nf3 cb4 8.Qb4 e4 9.Nd4 Nc5=) 6...Ngf6 (6...Be7 7.d4 ed4 8.ed4 Ngf6 9.Nf3 cb4=) 7.g3 (7.d4 ed4 (7...cd4 8.ed4 Be7= 9.Nf3 0–0=) 8.ed4 Qe7 9.Ne2 b6=) 7...Be7 (7...Rb8 8.d3 b5 9.Nf3 bc4+=) 8.Bg2 0–0 (8...Rb8 9.d3 b5+=) 9.Nc3 (9.f4 Rb8+=) 9...Rb8 10.Nge2 b6 (10...b5 11.f4+=) 11.d4 (11.0–0 b5=) 11...cd4 12.ed4 Bb7 13.d5 (13.Bb7 Rb7 14.0–0 Rc7=) 13...a5 (13...Qc7!? 14.Rc1 Rbc8=) 14.0–0= Ba6 15.Rac1 Ng4 (15...ab4 16.ab4 Qc7 17.b5=) 16.h3+= Nh6 17.f4 Nf5 (better is 17...ab4 18.ab4 b5 19.cb5 Bb5 20.Nb5 Rb5+=) 18.Be4?? (better is 18.Ne4 f6 19.Qd3+/–) 18...Ne3–/+ 19.b5 (19.Bd3 Nf1 20.Rf1 f5–/+) 19...Nc5–+ 20.Qa2 Nf1 21.Rf1 Bc8 22.Bg2 Bf5 (22...Re8 23.Qb1–+) 23.fe5–/+ Bd3 24.ed6 Bd6 25.Rf3 Be2 (25...Re8 26.Nc1 Re1 27.Kf2 Qe8–+) 26.Ne2+= Qe8 (26...Re8 27.Nd4+=) 27.Nf4 Bf4 28.Rf4 Qe3 29.Kh2 h6 (29...Qe2 30.Qb1=) 30.Rg4 f6 31.Qa1 (31.Bd4 Qd3+=) 31...Nd7 (31...Qe2 32.Bd4=) 32.Bc1+= Qe5 33.Qb1 f5 (better is 33...h5 34.Re4 Qd6+=) 34.Rg7?? (better is 34.Bb2 fg4 35.Be5 Ne5 36.hg4 Nc4 37.g5+/–) 34...Qg7–+ 35.d6 Rf6 (better is 35...Rbd8!? 36.Qc2–+) 36.Bb2 Rbf8 (36...Rd8 37.Bd5 Kf8 38.Qa1–+) 37.Bd5 Kh8 38.Be6 (38.Qf1 Nc5–+) 38...Nc5 (38...Nc5 39.Bf5 Rd8–+ (39...Rf5?! 40.Bg7 Kg7 41.Qa1 R5f6 42.Qe5–+)) 0–1. Nyikos,Laszlo – Wiebke,Elfriede, 14 sen. LSenEM Brandenburg op, 2006.

5.Qb3 Be7 A) 6.d4 Ngf6 (6...a5 7.ba5 Ngf6 8.Nf3 ed4 9.ed4 d5=; 6...ed4 7.Nf3 Ngf6 8.Nd4 c5 9.Nf5 0–0=) 7.Nf3 ed4 8.Nd4 0–0 9.a3 a5=; B) 6.Nf3 Ngf6 (6...a5 7.ba5 Ngf6 8.d4 ed4 9.ed4 d5=) 7.d4 ed4 8.Nd4 0–0 9.a3 Re8=.

5.Qb3 Ngf6 A) 6.Nc3 Be7 (6...a5 7.ba5 Nc5 8.Qc2 e4 9.Ba3 Qe7=) 7.d4 0–0 8.Bd3 ed4 9.ed4 c5+=; B) 6.d4 ed4 (6...a5 7.ba5 ed4 8.ed4 d5 9.Bd3 dc4=) 7.Bd4 a5 8.ba5 Ra5 9.Nf3 Be7=.

5.Nc3 a5 6.a3 Ngf6 (6...Nb6 7.Nf3 Nf6 8.Be2 Be7 9.0–0 Bg4 10.d4 Bf3; 6...Ne7 7.Nf3 g6 8.d4 Bg7 9.Bd3 0–0 10.0–0 ab4) 7.Nf3 Nb6 8.c5 ab4 9.ab4 Ra1 10.Qa1 dc5.

5.Nc3 a5 6.b5 Be7 7.Nf3 Ngf6 8.d4 0–0 9.Bd3 ed4 10.ed4 Nb6.

5.Nc3 a5 6.b5 Ngf6 7.Nf3 e4 8.Nd4 Nc5 9.d3 Bg4=.

5.Nc3 a5 6.b5 Ngf6 7.Nf3 Be7 8.d4 0–0 9.Bd3 ed4 10.ed4 Nb6.

5.Nc3 Be7 A) 6.Be2 a5 (6...Ngf6 7.Nf3 a5 8.a3 Nb6 9.0–0 Bg4 10.d4 Bf3; 6...g6 7.Nf3 Ngf6 8.0–0 0–0 9.d4 Re8 10.h3 ed4) 7.a3 Ngf6 8.Nf3 Nb6 9.0–0 Bg4 10.d4 Bf3; B) 6.Bd3 Ngf6 (6...Nb6 7.Nf3 Nf6 8.h3 0–0 9.0–0 Be6 10.Qb3 h6; 6...a5 7.a3 Ngf6 8.Nf3 0–0 9.0–0 Nb6 10.Qc2 Bg4) 7.Nf3 0–0 8.0–0 Nb6 9.Qc2 g6 10.h3 a5; C) 6.a3 Ngf6 (6...h6 7.Qg4 g5 8.Qd1 Ngf6 9.Bd3 Nb6 10.h3 Be6; 6...Nh6 7.Nf3 0–0 8.Be2 a5 9.0–0 Nf6 10.Qc2 Bd7) 7.Nf3 0–0 8.Bd3 Nb6 9.0–0 Be6 10.Qe2 h6; D) 6.Nf3 Ngf6 (6...a5 7.a3 Ngf6 8.Bd3 0–0 9.0–0 Nb6 10.Qc2 Bg4) 7.Be2 a5 8.a3 Nb6 9.0–0 Bg4 10.d4 Bf3.

5.Nc3 Ngf6 A) 6.Nf3 Be7 (6...a5 7.a3 Nb6 8.Bd3 Be6 9.Qb3 h6 10.0–0 Be7; 6...Nb6 7.Be2 a5 8.b5 Be6 9.d3 Be7 10.Ng5 Bf5) 7.Bd3 Nb6 8.a4 a5 9.b5 0–0 10.0–0 Be6; B) 6.a3 Nb6 (6...a5 7.Nf3 Nb6 8.c5 ab4 9.ab4 Ra1 10.Qa1 dc5; 6...Be7 7.Nf3 0–0 8.Bd3 Nb6 9.Qc2 g6 10.0–0 Be6) 7.Nf3 Be6 8.Qb3 Be7 9.d4 0–0 10.Be2 ed4; C) 6.Be2 a5 (6...Nb6 7.Nf3 a5 8.a3 Be7 9.0–0 Bg4 10.d4 Bf3; 6...Be7 7.Nf3 a5 8.a3 Nb6 9.0–0 Bg4 10.d4 Bf3) 7.a3 Nb6 8.Nf3 Be7 9.0–0 0–0 10.d4 e4; D) 6.Bd3 a5 (6...Be7 7.Nf3 0–0 8.0–0 Nb6 9.Qc2 g6 10.Qb3 Bg4; 6...Qe7 7.Qc2 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 Nb6) 7.a3 Nb6 8.Nf3 Be6 9.Qb3 h6 10.0–0 a4.

5.Bd3 A) 5...a5 A1) 6.Qa4 Ne7 (6...Ngf6 7.Nc3 c6 8.a3 Nb6 9.Qb3 d5 10.cd5 Nbd5; 6...Be7 7.Nf3 Ngf6 8.Nc3 0–0 9.a3 ab4 10.Qa8 bc3) 7.Nc3 Nc6 8.Nd5 Ra7 9.b5 Nc5 10.Qc2 Nb4; A2) 6.a3 ab4 (6...Nb6 7.Nc3 Qe7 8.Nf3 Nf6 9.e4 Nh5 10.g3 g6) 7.ab4 Ra1 8.Ba1 b5 9.Nc3 bc4 10.Bc4 Nb6; B) 5...Ngf6 6.Nc3 a5 (6...Qe7 7.Qc2 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 Nb6; 6...Be7 7.Nf3 0–0 8.0–0 Nb6 9.Qc2 a5 10.b5 g6) 7.a3 Nb6 8.Nf3 Qe7 9.e4 Nh5 10.g3 g6; C) 5...Qe7 C1) 6.Qc2 Ngf6 (6...a5 7.Nc3 ab4 8.Nd5 Qd8 9.Nf3 Nc5 10.Be2 e4; 6...Nb6 7.Nf3 Nf6 8.Nc3 Be6 9.Ne4 Ne4 10.Be4 0–0–0) 7.Nc3 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 Nb6; C2) 6.Be2 e4 (6...Ngf6 7.Nc3 g6 8.Nf3 Bg7 9.Qc2 0–0 10.0–0 a5; 6...d5 7.cd5 Qb4 8.Qc2 Bd6 9.Nf3 Ngf6 10.Nc3 0–0) 7.Nc3 Ngf6 8.Nh3 Ne5 9.Nf4 c6 10.h4 g6; C3) 6.Nh3 Nb6 (6...Ngf6 7.Nc3 e4 8.Be2 Ne5 9.Nf4 c6 10.h4 g6; 6...c5 7.Nc3 Ngf6 8.a3 e4 9.Be2 Ne5 10.Nf4 Be6) 7.Nc3 Be6 8.Qb3 Qh4 9.Nd5 Rc8 10.0–0 Nf6; C4) 6.Nc3 Ngf6 (6...a5 7.Nd5 Qd8 8.a3 Ngf6 9.Ne2 c6 10.Ndc3 Be7) 7.Qc2 a5 8.a3 ab4 9.ab4 Ra1 10.Ba1 Nb6; D) 5...e4 6.Be4 Ngf6 7.Nc3 Ne5 8.d3 a5 9.ba5 Be7 10.Nf3 0–0; E) 5...Ne7 E1) 6.Nf3 a5 (6...c5 7.a3 Nc6 8.Qa4 cb4 9.ab4 d5 10.cd5 Nb4; 6...Nc6 7.a3 Nb6 8.Nc3 Be6 9.Qb3 Be7 10.0–0 0–0) 7.a3 ab4 8.ab4 Ra1 9.Ba1 Nb6 10.Na3 g6; E2) 6.Nc3 Nc6 (6...a5 7.a3 ab4 8.ab4 Ra1 9.Qa1 Nb6 10.Nf3 Be6) 7.Nd5 Nf6 8.Nf3 Be7 9.Bc3 0–0 10.0–0 Be6.

5.d4 Ngf6 6.a3 (6.Nd2 Be7 7.Bd3 c5 8.bc5 ed4 9.ed4 dc5=; 6.Be2 Be7 7.Nf3 0–0 8.a3 a5 9.b5 ed4=; 6.Nf3 e4 7.Nfd2 d5 8.a3 c6 9.Be2 Bd6=) 6...Be7 (6...a5 7.Qa4 e4 8.d5 Ra6 9.c5 Ra7+=) 7.Nf3 e4 8.Nfd2 a5 9.b5 c6=.

5.Nf3 a5 A) 6.b5 Ngf6 (6...Be7 7.Nc3 Ngf6 8.d4 0–0 9.Bd3 ed4 10.ed4 Nb6; 6...e4 7.Nd4 Ngf6 8.Nc3 Nc5 9.Be2 Be7 10.0–0 Be6) 7.Nc3 Be7 8.d4 0–0 9.Bd3 ed4 10.ed4 Nb6; B) 6.ba5 Ngf6 (6...Be7 7.Nc3 Ngf6 8.d4 0–0 9.Bd3 Ra5 10.0–0 b6; 6...Ra5 7.Nc3 Ngf6 8.Be2 g6 9.d4 Bg7 10.de5 Ne5) 7.Nc3 Ra5 8.Be2 g6 9.d4 Bg7 10.de5 Ne5; C) 6.Qa4 Ngf6 (6...Be7 7.Nc3 Ngf6 8.a3 0–0 9.Qb3 b6 10.Be2 e4; 6...b6 7.c5 bc5 8.bc5 Ngf6 9.Nc3 Be7 10.cd6 cd6) 7.Nc3 Be7 8.Bd3 0–0 9.a3 ab4 10.Qa8 bc3; D) 6.a3 e4 (6...ab4 7.ab4 Ra1 8.Ba1 e4 9.Nd4 Ngf6 10.Nc3 Ne5; 6...Ngf6 7.Nc3 Nb6 8.Bd3 Qe7 9.Ng5 h6 10.Nge4 Ne4) 7.Nd4 ab4 8.ab4 Ra1 9.Ba1 Ne5 10.Nc3 Nf6.

5.Nf3 b6 6.a4 Bb7 7.Be2 (7.d4 d5=) 7...Ngf6 8.Nc3 c5 9.b5 ab5 10.ab5 Ra1 11.Qa1 Be7 12.d3 0–0 13.e4 Qa8 14.Qc1 1–0. GuestHDRS – jesuisla, freechess.org, 2017.

5.Nf3 c5 A) 6.bc5 e4 (6...Nc5 7.d4 Qb6 8.Qc2 ed4 9.ed4 Ne6 10.a4 Nf6; 6...Ngf6 7.cd6 e4 8.Nd4 Bd6 9.Nc3 Nc5 10.Be2 0–0) 7.Nd4 dc5 8.Ne2 f5 9.Ng3 Kf7 10.Nf5 Ngf6; B) 6.d4 cb4 (6...ed4 7.ed4 cb4 8.Bd3 Ngf6 9.0–0 Be7 10.Re1 0–0; 6...cd4 7.ed4 Ngf6 8.Nc3 Be7 9.Be2 0–0 10.0–0 b6) 7.a3 e4 8.Nfd2 ba3 9.Na3 f5 10.Be2 Ngf6; C) 6.Nc3 cb4 7.Nd5 Ngf6 8.Qa4 Be7 9.Qb4 0–0 10.Rc1 Nc5.

5.Nf3 e4 6.Nd4 Ne5 7.Nc3 Nf6 8.a3 c5 9.Nb3 Be6=.

5.Nf3 e4!? 6.Nd4 Ne5= 7.Nc3 Nf6 8.f4 ef3 9.Nf3 Bf5 10.Ne5 de5.

5.Nf3 e4!? 6.Nd4 Ngf6 7.Nc3 Ne5 8.f4 ef3 9.Nf3 Bf5 10.Ne5 de5.

5.Nf3 f6 6.Nc3 '+/=' (6.Be2 a5 (6...Nh6 7.Nc3 Nb6 8.d4 a5 9.b5 Be7 10.de5 de5; 6...Ne7 7.Nc3 Nb6 8.d4 a5 9.b5 Ng6 10.0–0 Be7) 7.b5 Nh6 8.Nc3 Be7 9.Nd5 0–0 10.0–0 c6; 6.d4 f5 (6...e4 7.Nfd2 f5 8.Nc3 Ngf6 9.Be2 a5 10.a3 Be7; 6...ed4 7.Nd4 Ne5 8.Nc3 Ne7 9.f4 Ng4 10.Qf3 a5) 7.h4 Be7 8.Nc3 ed4 9.ed4 Ngf6 10.Bd3 0–0; 6.Bd3 a5 (6...Ne7 7.Nc3 Nb6 8.Qb3 Be6 9.a3 d5 10.cd5 Ned5) 7.a3 ab4 8.ab4 Ra1 9.Ba1 Ne7 10.Qb3 Nb6) 6...c6 (6...Ne7 7.Bd3 Nb6 8.Qb3 Be6 9.Na4 Na4 10.Qa4 Nc6; 6...a5 7.b5 Ne7 8.d4 ed4 9.ed4 Nb6 10.Bd3 d5; 6...Nb6 7.d4 ed4 8.Qd4 Ne7 9.c5 dc5 10.Qd8 Kd8) 7.a4 (7.Bd3 Nb6 8.Qc2 Be6 9.Ne4 d5 10.cd5 Nd5) 7...Be7 (7...Nh6 8.d4 Be7 9.Be2 0–0 10.Qb3 a5) 8.Be2 (8.a5 Nh6 9.Bd3 0–0 10.0–0 f5) 8...Nh6 (8...a5 9.b5 Nh6 10.0–0 0–0) 9.d4 (9.a5 0–0 10.0–0 f5) 9...0–0 (9...Qb6 10.Qb3 a5) 10.0–0 b6 (10...f5+/–) 11.Qb3 Kh8 12.Rfd1 Rb8 13.Qc2 Rg8 14.b5 c5 15.d5 (15.de5 fe5 16.Bd3 g6+/–) 15...Qe8 16.Bd3 g6 17.a5 f5 18.e4 (18.ab6 Rb6 19.h3 Bf6+/–) 18...Qf8 19.Ne2 (19.ba6!? Ba6 20.Rdb1+/–) 19...Nf6 20.Ng3 f4 (20...ab5 21.cb5 ba5 22.Ra5+=) 21.Ne2 '+/=' 21...g5 22.Ra3 g4 '?' (better is 22...ab5 and Black could well hope to play on 23.cb5 ba5 24.Ra5 Nf7+=) 23.Ne5 '+–' 23...de5 24.Be5 Bd6 25.Qc3 Be5 26.Qe5 Bb7 (26...Bd7!? 27.Nf4 ab5 28.cb5 Qg7+–) 27.Nf4 '+–' 27...Qf7 '?' (27...g3 28.hg3 ab5 29.a6+–) 28.Ne6 (better is 28.ab6 keeps an even firmer grip 28...ab5 29.cb5 Rge8+–) 28...Rbe8 '?' (28...ab5 29.ab6 Rgc8+–) 29.ba6 Bc8 (29...Ba6 the only chance to get some counterplay 30.ab6 Bc8+–) 30.ab6 Be6 (30...g3 doesn't get the cat off the tree 31.hg3 Nhg4 32.Qa1+–) 31.de6 Re6 32.Qc5 Nd7 (32...g3 cannot change what is in store for ? 33.hg3 Nhg4 34.a7+–) 33.Qd4 Qg7 34.Qg7 Kg7 35.c5 Nc5 36.Bc4 Rb6 37.Bg8 Na6 38.Bc4 Nc5 39.Ra7 Kg6 40.e5 Kf5 (40...Nf5 does not win a prize 41.Bg8 Nb7 42.Bh7 Kh7 43.Rd7 Kg6 44.Rab7+–) 41.Rh7 Kg6 (41...Kg5 doesn't do any good 42.Rg7 Kf5 43.e6+–) 42.Rc7 Ne4 (42...Na4 doesn't change the outcome of the game 43.e6 Ng8 44.e7+–) 43.Bd3 Kf5 44.Re1 Ke5 45.Re4 Kd6 46.Rec4 (46.Rce7 might be the shorter path 46...Rb3 47.R4e6 Kc5 48.Rc7 Kd4 49.Rd7 Kc5 50.Rh6 Rb8+–) 46...Rb3 (46...Ng8 does not save the day 47.Rg7 Nf6 48.Rf4+–) 47.Be2 (better is 47.R4c6 it becomes clear that White will call all the shots 47...Ke5 48.Re7 Kd4 49.Rd7 Ke5 50.Rh6 Ra3+–) 47...Rb1 48.Bf1 Nf5 49.Rc1 Rb4 (49...Rb2 a fruitless try to alter the course of the game 50.R7c6 Kd7 51.Rg6+–) 50.R7c4 Rc4N 51.Rc4+– 1–0. Semenko,Georg – Hoenig,Josef, Bayern–ch Seniors (6), 1994.

5.Nf3 Ngf6 6.Nc3 a5 (6...Be7 7.Bd3 0–0 8.0–0 Nb6 9.Qb3 a5 10.ba5 Ra5; 6...Nb6 7.c5 dc5 8.bc5 Bc5 9.Ne5 Bd6 10.d4 0–0) 7.a3 Nb6 8.Bd3 Be6 9.Qb3 h6 10.0–0 a4.

5.Nf3 Ngf6 6.Be2 Be7 7.0–0 b6 8.d3 Bb7 9.Nbd2 0–0 10.Qc2 a5 11.a3 Re8 12.h3 h6 13.Rfe1 Rc8 (13...Nf8 14.Bc3+=) 14.ba5 Nc5 Black prepares e4 15.ab6 cb6 16.a4 Bc6 (16...e4!? 17.Ne4 Nfe4 18.de4 Be4+=) 17.d4+/– e4 18.dc5 ef3 19.Nf3 Ne4? (better is 19...Be4!? 20.Bd3 d5+/–) 20.Nd4 (20.cb6 Qb6 21.a5 Qa6+–) 20...Nc5 21.Nc6 Rc7 1–0. GuestRCFM – GuestXXDS, freechess.org, 2017.

5.a3 Ngf6

6.Qa4 Be7 (6...a5 7.Nc3 c6 8.Nf3 Nb6 9.Qb3 Bf5 10.Be2 Be7; 6...c6 7.Nf3 e4 8.Nd4 Ne5 9.Nc3 Bd7 10.Qc2 c5) 7.Nc3 0–0 8.Bd3 b5 9.cb5 Bb7 10.Nge2 ab5.

6.Qc2 a5 (6...g6 7.Nf3 Bg7 8.Bd3 0–0 9.Nc3 Nb6 10.0–0 Qe7; 6...h6 7.Nc3 Nb6 8.Nf3 Be6 9.Qb3 Be7 10.d4 e4) 7.Nc3 ab4 8.ab4 Ra1 9.Ba1 Nb6 10.Nf3 Be6.

6.Nc3 a5 7.Nf3 Nb6 8.Be2 e4 9.Ng5 Bf5=.

6.Nc3 Nb6 7.Nf3 Bf5 8.c5 dc5 9.Ne5 cb4 10.ab4 Bd6.

6.Nc3 Qe7 7.Nf3 g6 8.Bd3 Bg7 9.Ng5 0–0 10.Qb3 h6.

6.Nc3 Be7 7.Nf3 0–0 8.Bd3 Nb6 9.0–0 Be6 10.Qe2 h6.

6.d3 a5 7.Nf3 Be7 8.Be2 c6 9.Nc3 ab4=.

6.Nf3 e4 7.Nd4 Ne5 8.d3 c5 9.Nb3 cb4=.

4.c4 Be6

5.a3 Nc6 6.d4 ed4 7.ed4 Qe7 8.Qe2 d5=.

5.Nc3 Nf6 6.Be2 (6.Nf3 Nc6=) 6...Be7 (6...d5 7.cd5 Nd5 8.a3=) 7.Nf3= 0–0 8.0–0 Nc6 9.a3 Qd7 (9...Re8 10.d4 ed4 11.Nd4 Nd4 12.Qd4=) 10.d4 ed4 11.Nd4 Nd4 12.Qd4 c5 13.Qd3 (13.Qf4 Rac8+=) 13...cb4 (13...b5 14.cb5 c4 15.Qd4 ab5 16.Bf3=) 14.ab4+= Rac8 15.Nd5 Nd5 16.cd5 Bf5 17.e4 Bg6 18.f4 (18.b5 ab5 19.f4 f5+=) 18...f6 (18...f5!? 19.Qd4 Bf6=) 19.f5+/– Bf7 20.Rac1 (20.Bd4 Ra8+/–) 20...Qa4 21.Bd4 Qd7 (21...Rc1 22.Rc1 Bd8 23.Rb1+/–) 22.Qe3 (22.b5 ab5 23.Qb5 Qb5 24.Bb5 g6+/–) 22...b5 (22...Rfe8 23.Rc8 Rc8 24.b5 ab5 25.Rb1+/–) 23.Bb6 (23.Ra1 Qb7+/–) 23...Rc1 (23...Bd8 24.Bf3+/–) 24.Rc1 Rc8 25.Rc3 (25.Ra1 Qb7+/–) 25...Rc3 26.Qc3 Be8 27.Kf2 (27.Qc7 Qc7 28.Bc7 Bd7+/–) 27...Kf7 (27...Bd8 28.Be3+/–) 28.h3 (28.Bh5 Kg8 29.Be8 Qe8+/–) 28...Bd8 29.Bd4 (29.Qe3 Bb6 30.Qb6 Qe7 31.Bh5 g6 32.fg6 hg6+=) 29...Qb7 (29...Kg8 30.Kg1+=) 30.Bh5 g6 31.Bg4 Bd7 (31...Kg7 32.fg6 Bg6 33.Kf3+/–) 32.fg6 (32.Qe3 Kg7+/–) 32...hg6 33.Bd7 Qd7 34.Qc6 (better is 34.g4!?+/–) 34...Qc6= 35.dc6 a5 ½–½. Diviak,Rudolf (1795) – Cisar,Marian (1665), 3rd Liga A2, 2014.

5.d4 ed4 6.ed4 Qe7 7.Qe2 d5 8.cd5 Bd5=.

5.Nf3 Nc6 6.a3+= e4 7.Nd4 Nd4 8.Bd4 c5=.

5.Nf3 Nc6 6.d4 ed4 7.Nd4 Nb4 8.Qb3 a5=.

5.Nf3 Nc6 6.d4 ed4 7.Nd4 Nd4 8.Bd4 Nf6 9.Nc3 Be7 10.Nd5 Bd5 (10...c5 11.Bc3=) 11.cd5+= 0–0 12.Bd3 c5 13.dc6! bc6 14.Qc2 h6? (better is 14...a5!?+=) 15.Qc6+– Qc8 (15...d5 16.a3 a5 17.Bb6+–) 16.Qc8 Rfc8 (16...Rac8?? 17.Ba6 Rc7 18.Bd3+–) 17.Ke2 Nd5 (17...d5 18.a3+–) 18.Be4 Rab8 (18...Nb4 19.Ba8 Ra8+–) 19.Bd5 Rb4 (19...Rb5 20.Be4 Rb4 21.Rab1+–) 20.Rab1 (20.Rab1 Ra4 21.Rb7+–) 1–0. mrkt – kaksen, internet, 2005.

5.Nf3 Nd7 6.Be2= Be7 7.Qc2 Ngf6 8.Ng5 0–0 9.Ne6 fe6 10.0–0 c6 11.Nc3 Kh8 12.d4 ed4 13.ed4 a5 14.b5 c5 15.Ne4 (better is 15.d5 ed5 16.cd5+=) 15...b6? (15...Qb6!?+=) 16.Bf3 (better is 16.Ng5 e5 17.Ne6+–) 16...Ra7? (better is 16...Ne8+/–) 17.Ng5+– 1–0. GuestTKGK – GuestMHNT, freechess.org, 2017.

5.Nf3 h6

6.a3 Nf6 7.Be2 (7.d4 e4 8.Nfd2 c6=) 7...Nc6 (7...Be7 8.d4 e4+=) 8.0–0 Be7 (8...e4+=) 9.d4 ed4 10.Nd4 Nd4 11.Qd4 0–0 12.Nd2 b6 13.Rfd1 c5 14.Qf4 Nh7 (better is 14...d5!?+=) 15.Ne4+– Bg5 (15...g5 16.Qg3 cb4 17.ab4+–) 16.Qg3 Nf6 17.Nd6 Qb8 (17...Nd7+–) 18.f4 Nh5 (18...Qd6 19.Rd6 Ne4+–) 19.Bh5 (19.Bh5 Qd8 20.fg5 Qg5 21.Qg5 hg5 22.Bf3+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

6.d3 Nf6 7.Be2 Be7 8.0–0 0–0 9.Nbd2 b5 10.a3 Nc6 11.cb5 ab5 12.d4 e4 13.Bb5 (better is 13.Ne4 Ne4 14.d5=) 13...Na7–/+ 14.Ne4 Ne4 15.Bd3 Nf6 16.Qc2 c6 17.Rfc1 Rc8 18.Qa4 Rc7 19.Rc3 Nd5 20.Rc2 Qb8 21.Rac1 Rfc8 22.e4 Nf4 23.Ba6 Rd8 24.d5 Bd7 (24...Bg4!? 25.Qb3 Qb6+=) 25.dc6+= Bc6 26.Rc6 Nc6 27.Rc6 Rc6 28.Qc6 Rf8 (better is 28...d5 29.e5 Qa7+/–) 29.Qc3?? (better is 29.Qd7 Qa8 30.Bb7+– (worse is 30.Qe7 Qa6 31.h4 Qd3–/+)) 29...Bf6= 30.Qc1 Bb2 31.Qb2 (31.Qf4 Ba3 32.b5 Qb6+=) 31...Qb6 (better is 31...Qa8 32.Bf1 Qe4–/+) 32.Bf1+= Re8 33.Nd2 d5 34.g3 Ng6 35.ed5 Re1 36.Kg2 Qd6 37.Bc4 (37.Qd4 Ne7+/–) 37...Ne5 (better is 37...Nh4! 38.Kh3 Qd7 39.g4 Ng6=) 38.Qd4+/– Rd1 39.Bb3 Re1 40.Nf3 Nf3 41.Kf3 Qf6? (better is 41...Rg1+/–) 42.Qf6+– gf6 43.b5 Rb1 44.Bc4 Rc1 45.Bd3 Rc3 46.Ke4 Ra3 47.f3 (better is 47.d6!? f5 48.Kd4+–) 47...Kf8 48.Kd4 Ke7 49.Be4 (better is 49.h3!?+–) 49...Kd6+= 50.Kc4 f5 51.Bf5 Rf3 52.g4 (better is 52.Bd3=) 52...Rf4–/+ 53.Kd3 Kc5 (better is 53...Kd5!? 54.Ke3 Rb4–+) 54.Ke3= Rb4 55.Bd7 Kd5 56.h4? (56.Kf3 Rb3 57.Kg2 Kd6+=) 56...f6 (56...Kd6 57.Be8–+) 57.Bc6 (better is 57.Kf3!?+=) 57...Ke5–/+ 58.Bd7 Rb3 59.Kd2 1–0. Fournier,Frederic (1615) – Macam (1810), Active, 2007.

6.d4 ed4 7.Nd4 d5 8.Ne6+/– Bb4 (8...fe6 9.Qh5 Ke7 10.Qg6 Nf6 11.Nc3 Nc6) 9.Bc3 (9.Nd2 fe6 10.Bg7 Bd2 11.Qd2 Rh7) 9...Bc3 10.Nc3 fe6 11.Qh5 (11.cd5 ed5 12.Qh5 Kf8 13.Qd5 Nc6+/–) 11...Kf8+= 12.cd5 ed5 (12...Nf6 13.Qh4 ed5 14.Qb4 Qd6 15.Qb7+=) 13.Qd5+/– Nc6 14.Qb3 Rb8 15.Be2 (15.Rd1 Qe7+/–) 15...Qe7 (15...Qf6 16.0–0+/–) 16.0–0 (16.Nd5 Qe5 17.0–0 Nge7+/–) 16...Qb4 (16...Nf6 17.Bf3 Na5 18.Qa4+/–) 17.Qc2 (17.Qb4 Nb4 18.Rab1 a5+/–) 17...Qc5 18.Rfd1 Nf6 (18...Nge7 19.Rac1+/–) 19.Rac1 Ke7?? (better is 19...Re8+/–) 20.Nd5!!+– (20.Nd5 Qd5 21.Rd5 Nd5 22.Qc5 Ke6 23.Bg4 Kf6 24.Qd5+–) 1–0. Tirado Parra,Alberto (1880) – Gines Sanchez,Javier, 5th Madrid Los Angeles op, 2011.

6.d4 ed4 7.Nd4 Bd7 A) 8.Nc3 Be7 (8...Nc6 9.Nc6 bc6 10.Ne4 d5 11.cd5 cd5; 8...Nf6 9.Nd5 Nc6 10.Nc6 bc6 11.Nf6 gf6) 9.b5 c5 10.Nf3 ab5 11.Nb5 Bb5; B) 8.Be2+= Nc6 (8...Nf6 9.0–0 Be7 10.Nc3 0–0 11.Nd5 Nc6) 9.Nc6 Bc6 10.0–0 Qg5 11.Bf3 Ne7.

6.d4 ed4 7.Nd4 Nf6 8.Bd3 Bd7 9.Nc3 Nc6 10.Nc6 bc6 11.0–0 Be7.

6.d4 d5 7.cd5 Bd5 8.a3 e4+=.

6.Be2 Nd7 7.d3 b6 (7...Ngf6 8.0–0=) 8.Nbd2 Ngf6 9.0–0 d5 (9...c6 10.Qa4 Qc7 11.e4+=) 10.a3 (10.Ne5 Ne5 11.Be5 Bd6+/–) 10...e4 (10...Bd6!?+=) 11.de4 de4 12.Nd4 Bd6 (12...Qe7 13.Qa4 (13.Ne6?! Qe6 14.Qa4 c6+/–) 13...Bg4 14.Qc6+–) 13.Nc6 (13.Qc2!?+–) 13...Qc8+= 14.Nd4 0–0 (14...Qd8 15.Qc2 0–0+–) 15.Ne6 fe6 16.Qc2 Qb7 17.Rad1 c5 18.h3 (18.Ne4 Ne4 19.Bg4=) 18...cb4+= 19.ab4 Bb4 20.Nb3 Rac8 (20...e5 21.Ra1–/+) 21.Nd4 Kf7 (21...Nc5 22.Nb3+=) 22.Qb3 Bc5 23.Qc2 (23.Rd2 e5 24.Nf5 Kg6=) 23...Ne5 (23...e5 24.Nb3+=) 24.f4 (24.Nb3 Qc7=) 24...Nc6 (24...ef3 25.Bf3 Nf3 26.Rf3+=) 25.f5 (better is 25.Qa4+=) 25...Bd4?? (better is 25...e5 26.Ne6 Be3 27.Kh1 Rg8=) 26.fe6+/– (worse is 26.Bd4 Nd4 27.ed4 ef5 28.Rf5 Kg8+=) 26...Ke6 27.ed4 (27.Bd4?! Nd4 28.ed4 Kf7+=) 27...Nb4 (27...Kd7 28.d5 Na5 29.Bf6 gf6 30.Bg4 Kd8 31.Bc8 Qc8 32.Qe4 Nc4 33.d6+–) 28.d5+– Kd7? (28...Kf7 29.Qd2 Nd3 30.Bf6 gf6 31.Qh6 Kg8 32.Rf6 Rf6 33.Qf6 Qf7 34.Qb6 Rc4 35.Bd3 ed3 36.Rd3 Rc1 37.Kh2 Rh1 38.Kh1 Qf1 39.Kh2 Qd3 40.Qb8 Kf7 41.Qc7 Kf6+–) 29.Qa4 Kd8 (29...b5 30.Qb4 a5 31.Qb3+– (worse is 31.Qb5 Qb5 32.cb5 Rc2 33.Bf6 gf6 34.Bg4 Kd6+–)) 30.Qb4 a5 (30...Rc5+–) 31.Qf8 1–0. GuestBGGS – GuestDMNB, freechess.org, 2017.

4.c4 Bf5

5.d4 Nc6 6.a3 ed4 7.ed4 Nf6 8.Nf3 d5 9.c5 Be7 10.Be2 0–0 11.0–0 Re8 12.Nfd2 Qd7 ½–½. Reuter,A – Lenz,Thomas2, Koblenz op, 1990.

5.Nf3 Bb1 6.Rb1 Nf6 7.Bd3 Be7 8.0–0 e4 9.Bf6+/– ed3 10.Bg7 Rg8 11.Bb2 (11.Ba1 d5 12.Qb3 dc4+–) 11...Bf6 (11...Qd7 12.Ne1+/– d5+–) 12.Nd4 (12.Ne1!? Bb2 13.Rb2 Qh4+–; 12.Qb3 Bb2+–) 12...Bd4+/– 13.ed4 Qg5 14.g3 h5 (14...Qf5!?+/–) 15.Re1 Kd7 16.Qf3 Nc6 17.d5 (better is 17.Qf7 Kc8 18.Qe6 Kb8 19.h4+–) 17...Ne5? (17...Nd8+–) 18.Be5 de5 19.Qf7 (19.Qd3?! h4+–) 19...Kc8 (19...Kd8 20.h4! Qg7 21.Qg7 Rg7 22.Re5+–) 20.Re5! Qg7 (20...Qe5 21.Qg8) 21.Re8 Re8 22.Qe8 1–0. pierre – vbogi, internet, 2008.

5.Nf3 Bb1 6.Rb1 h6 7.d4+/– (7.Bd3 Nf6 8.0–0 Be7 9.Bf5 0–0 10.a3 g6 11.Bc2+/–) 7...e4 8.Nd2 d5 9.cd5 Qd5 10.Bc4 (10.Qg4 f5 11.Qg6+/–) 10...Qc6 (10...Qf5 11.Qb3+/–) 11.0–0 (11.Qg4 Bb4 12.Rc1 Qb6+/–) 11...Bb4 (better is 11...b5!? 12.Bb3 Nf6+/–) 12.d5+– Qc5 (12...Qd7 13.Bg7 Rh7 14.Rb4 Rg7 15.Rb7+–) 13.Bd4 (worse is 13.Bg7 Bd2 14.Bh8 Qc4 15.Qd2 Qd3 16.Qd3 ed3 17.Rb7 Ne7 18.Rc7 Nd5+–) 13...Qe7 (13...Qa5 14.Ne4 Nd7 15.a3+–) 14.Qa4 Nd7 (14...c6 15.Qb4 Qb4 16.Rb4 b5+–) 15.Rb4 (worse is 15.Qb4 b5 16.d6 Qd6 17.Qd6 cd6+–) 15...b5 (15...b6 16.Bg7 Rh7 17.Be2+–) 16.Bb5! ab5 (16...Rd8 17.Bc6 f5 18.Rfb1+–) 17.Qa8 Nb8 (17...Qd8 18.Qd8 Kd8 19.Ne4 Ne7 20.Bg7 Rg8 21.Bh6 Rg6+–) 18.Qb8 Kd7 19.Qb5 Kc8 20.Ra4 Nf6 (20...Qa3 21.Qe8 Kb7 22.Qa8) 21.Ra8 1–0. pierre – q12_roma, internet, 2008.

5.Nf3 Nc6 6.a3 b5?? 7.cb5+– ab5 8.Bb5 Nge7 (8...Bd7 9.0–0+–) 9.0–0 g6 (9...Qd7 10.d4 Rb8 11.Bc6 Nc6 12.de5+–) 10.Qc1 (10.d4 Bd7+–) 10...Bd7 11.d4 Bg7 12.d5! Na7 (12...Nd5 13.Bc6 Double attack (13.Bc6 Deflection; 13.Bc6 Decoy)) 13.Bd7 Qd7 14.Nbd2 (better is 14.Qd2+–) 14...Qg4? (better is 14...Nd5!? 15.Rd1 f5+/–) 15.h3 (15.Qc7 Qd7 16.Qd7 Kd7+–) 15...Qf5 (15...Qc8 16.e4+–) 16.e4 (16.Qc7!? Qd7 17.Qd7 Kd7+–) 16...Qd7 17.Qc2 Nb5 (17...f5+–) 18.Rfc1 0–0 (18...Rc8+–) 19.a4 Nd4 20.Nd4 ed4 21.Qd3 White prepares the advance b5 (better is 21.Qc7!? Rfd8+–) 21...c5 (21...Ra4 22.Ra4 Qa4 23.Bd4 Bd4 24.Qd4 c5 25.dc6 Nc6 26.Qd6 Nb4+–) 22.dc6! Nc6 23.b5 Ne5 24.Qg3 Qe6 (24...Bh6 25.f4 f5 26.Bd4 (26.fe5?! Bd2 27.Qb3 Qf7+–) 26...fe4 27.Rf1+– (27.Be5?! de5 28.Ne4 Qd4 29.Nf2 Bf4 30.Qb3 Kh8=)) 25.Bd4 Rfc8 26.Rc8 Rc8 27.b6 (27.a5 Nc4 28.Qd3 Bd4 29.Qd4 Nd2 30.Qd2 Qe5+–) 27...Rc2? (27...Nc4 28.Bg7 Nd2+–) 28.b7 Nd7 29.Bg7 Kg7 30.Nf3 (30.Rd1!? Nb8+–) 30...Qe4 31.Qd6 (better is 31.Rb1!? Rc6 32.b8Q Nb8 33.Rb8 Qa4 34.Qg5+–) 31...Qb7 32.Qd4 Kg8 33.Re1 Rc8 34.Ng5 Nf8 35.Kh1 (35.a5 h6 36.Ne4 Ne6+–) 35...Qc7 36.Nf3 (36.Ne4 Ne6 37.Nf6 Kg7 38.Ne8 Kf8 39.Re6 Qc1 40.Kh2 fe6+–) 36...Rd8 (36...Rd8 37.Qf6 Rd6+/–) 0–1. GuestNJPY – GuestYGFV, freechess.org, 2017.

5.Nf3 Nd7 6.Be2 Ngf6 7.0–0 Be7 8.Nc3 0–0 9.d4 ed4 10.Nd4 Bg6 11.Nf3 (11.f4 h6+=) 11...h6 12.a3 Re8 13.Bd3 Bh5 14.Be2 c6 (14...Bg6 15.Qd4+=) 15.Qc2 (15.Nd4 Be2 16.Qe2 Qc7+=) 15...Bg6 16.Bd3 Bd3 17.Qd3 Bf8 18.Ne2 (18.Rfd1 Qe7+=) 18...Ne5= 19.Ne5 de5 20.Qd8 Rad8 (worse is 20...Red8 21.Be5 Rd2 22.Ng3+/–) 21.Rfd1 Rc8 (21...Rd1 22.Rd1 c5 23.bc5 Bc5 24.Nc3=) 22.c5+= a5 23.Nc3 Ra8 24.f3 ab4 25.ab4 Ra1 (25...Rab8 26.f4=) 26.Ba1 Re7 27.Kf2 Rd7 28.Ke2 Rd1 29.Kd1 Nd7 30.Ne4 f6 31.Bc3 (31.f4 Kf7=) 31...Kf7= 32.Kc2 f5 (32...Ke6 33.Nf2=) 33.Nf2 (33.Nd2 b5+=) 33...Ke6 34.e4 g6 35.g4 b6 36.cb6 Nb6 37.Kb3 Nd7 38.Kc4 Nb6 39.Kb3 Nd7 40.Kc4 ½–½. Vaast,Jean Philippe – Weber,Richard (1730), Reunion op 7th, 2004.

5.Nf3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Bf5 5.Nf3 a6).

5.Nf3 h6 6.d4 ed4 (6...e4!? 7.Qc2 Nf6=) 7.Nd4+/– (7.Bd4?! c5 8.Bb2 Nc6=) 7...Bb1 (7...Bd7!?+/–) 8.Rb1 (8.Qb1 Nf6+/–) 8...Nf6 9.Be2 Be7 10.Bf3 c6 (10...Qc8 11.Qa4 c6 12.b5+–) 11.Nf5 0–0 12.0–0 Nbd7 13.Bc3 (13.Nd6 Qc7 14.c5 a5 15.ba5 Nc5+–) 13...Ne5+/– 14.c5! dc5?? (better is 14...Qd7 15.Ne7 Qe7 16.Qd6 Nf3 17.gf3 Qe6+/–) 15.Be5+– cb4 16.Qd8 Rad8 (16...Bd8 17.Rb4 Re8+–) 17.Ne7 Kh8 (17...Kh7 18.Rb4 Rd7 19.Nf5+–) 18.Rb4 Rde8 (18...Rd7 19.Nf5 Re8 20.Bf6 gf6 21.Rh4+–) 19.Rb7 Nd5 20.Nc6 Re6 21.Bd5 (21.Bd5 Rg6 22.Ne7+–) 1–0. Janek – Guttesman, internet, 2017.

5.Nf3 h6 6.Be2 Nf6 7.Nc3 Nc6 8.b5 ab5 9.cb5 Na7 10.a4 b6 11.d3 Nc8 (11...Be7 12.e4 Bg6 13.0–0+=) 12.e4 Bg4 (12...Bg6 13.0–0+=) 13.h3 Bh5 14.Nh4 (better is 14.0–0+/–) 14...Ne7?? (better is 14...Be2 15.Qe2 g6+=) 15.Bh5+– Nh5 (15...d5 16.Be2+–) 16.Qh5 Ng8 17.Nd5 Be7 (17...Ne7+–) 18.Nf5 (better is 18.Ng6 Rh7 19.Qf5+–) 18...g6 19.Ng7 Kf8 20.Ne6?? (better is 20.Qg6! Nf6 21.Qg3 Nd5 22.Nf5+–) 20...fe6+/– 21.Qg6?? (better is 21.Qf3 Nf6 22.Nb4+/–) 21...ed5–/+ 22.ed5 Bg5 (22...Qe8 23.Qf5 Qf7 24.Qf7 Kf7 25.f4–/+) 23.0–0 Qf6 (23...Ne7 24.Qe4 Rg8 25.d4+=) 24.Qh5 (24.Qe4 Bf4 25.d4 Qg7=) 24...Qf7 (better is 24...Ne7!?–/+) 25.h4?? (better is 25.Qf7 Kf7 26.f4+=) 25...Qh5–+ ½–½. GuestMHHR – alekbb, freechess.org, 2017.

4.c4 g6

5.Nc3 Nc6 =.

5.d4= Nc6 6.de5 (6.b5 Nb8 (6...ab5 7.cb5 Na5+= 8.de5 Bg7 9.Nf3 Bg4+=) 7.de5 Bg7 8.f4 ab5 9.cb5 Be6+=) 6...Bg7= (6...Ne5? 7.f4+–) 7.a3 (7.Nf3 A) worse is 7...Nb4 8.Qd2 A1) 8...c5 9.a3+/– Nc6+/–; A2) 8...a5 9.a3 Nc6+/–; B) 7...Be6 8.Be2 Ne5 9.Qb3 Ne7+=; C) 7...Bg4= 8.Be2 de5 9.Qa4 Nge7=; 7.f4 Bf5 8.Bc3 de5 9.Qd8 Rd8=) 7...Be5 (7...Ne5 8.Bd4 Nf6 9.Nf3= Nc6=) 8.Be5 (8.Nc3 Bg7= 9.Nf3 Nf6+=) 8...Ne5 9.Nf3 Bg4 (9...Qf6=) 10.h3 (10.Be2 Qf6 11.Nbd2 Bf3 12.Nf3 Nf3 13.Bf3 Qc3 14.Kf1 Qc4 15.Kg1 0–0–0=) 10...Bf3 11.gf3 Qf6 12.Nd2 Ne7 13.f4 Nd7 14.Bg2 c6? (better is 14...0–0–0=) 15.Ne4+– Qe6 16.Nd6 Kf8 (16...Kd8 17.Nb7 Kc7 18.Na5+–) 17.Nb7 Nf6 (17...Nf5 18.0–0+–) 18.Na5 (18.Qd4!? Nf5 19.Qc5 Kg7+–) 18...Kg7 19.0–0 Rhd8 20.Qe2 Rac8? (20...Ne4 21.Qc2 f5 22.Nb3+–) 21.Rfd1 (21.Nb7!? Rg8+–) 21...Rd1 22.Rd1 c5 23.e4 cb4 24.ab4 Qb6 25.Qb2 Kg8? (25...Rb8 26.Rb1+–) 26.c5 (better is 26.Qe5 Ne4 27.Be4 (worse is 27.Qe4 Qb4 28.Qe5 Nf5+–; 27.Qe7?! Qf2 28.Kh1 Ng3 29.Kh2 Nf5+–) 27...Qb4 28.Rd7 Qe1 29.Kg2+–) 26...Qe6?? (better is 26...Rc5 27.Qd4 Rb5 28.Qb6 Rb6+–) 27.Rd6 (27.Rd6 Nd7 28.Re6 fe6 29.Qd4+–) 1–0. Hunt,Lorne – Sexsmith,Kyle, Labour Day op, 2004.

5.Nf3 Nd7 6.d4 =.

5.Nf3 Bg4 6.h3+= Bf3 7.Qf3 Bg7 8.Qb7+/– Nd7 9.Nc3 Qb8 10.Qb8 Rb8 11.a3 e4 12.Rb1 Bc3+/– 13.Bc3 Ngf6 14.c5 dc5+/– 15.Ba6 cb4 16.Rb4 Rb4 17.Bb4 Nd5 18.Ba5 0–0 19.0–0?? Ra8=+ 20.Bb5 Ra5 21.Bd7 Ra3 22.Rc1 Ra7 23.f3 ef3 24.gf3 Ne7 25.Kf2 c5 26.Bb5+= Rc7? 27.d4+– c4 28.Rc4 Rc4 29.Bc4 Kg7 30.e4 f5 31.d5 f4 32.d6 Nc6 33.Bd5 Nd8 34.e5 g5 35.e6 Kf8 36.e7 Ke8 37.ed8Q Kd8 38.Be6 h5 39.Ke2 Ke8 40.Kd3 Kd8 41.Ke4 Ke8 42.Kf5 g4 43.hg4 hg4 44.Kg4 (44...Kd8 45.Kf4+–) 1–0. Dopper,Johan – Brouwer,Teun, 1994.

4.c4 h6

5.Nf3 Nf6 6.Be2 Bd7 7.a4 (7.0–0 e4 8.Nd4 c5+=) 7...Bc6 (7...c5 8.bc5 e4 9.c6 Nc6 10.Nd4=) 8.b5 (8.Nc3 Bd7+=) 8...ab5 (8...Bd7 9.0–0=) 9.ab5+= Ra1 10.Ba1 Be4 (10...Bd7 11.d4 e4 12.Nfd2+=) 11.Nc3 Bf3 (11...Bf5 12.d4 Nbd7 13.0–0+=) 12.Bf3+/– (worse is 12.gf3 Nbd7=) 12...e4? (better is 12...c6+/–) 13.Ne4+– Ne4 (13...Nfd7 14.0–0+–) 14.Be4 Qe7 (14...c6 15.bc6 bc6 16.Qf3+–) 15.Qf3 (15.Bb7 Qe6 16.d3 Nd7+–) 15...Qd8 (15...b6 16.0–0+–) 16.Bb7 Nd7 (16...Qg5 17.0–0+–) 17.Bc6 Qe7 18.0–0 Kd8 (18...Qe6 19.d3+–) 19.d4 (19.Bd4 Qe6 20.Bd7 Qd7 21.Bf6 gf6 22.Qf6 Ke8+–) 19...Nf6 (19...Qf6 20.Qf6 Nf6 21.Bc3+–) 20.Bb2 (20.Bb2 Nd7 21.Ra1+–) 1–0. GuestCXLM – kalikali, freechess.org, 2016.

5.Nf3 Nf6 6.Be2 e4 7.Nd4=.

5.Nf3 Nf6 6.Be2 Be7 7.d3 Be6 8.0–0 Nc6 (8...0–0 9.Nc3=) 9.a3 Qd7 (9...0–0 10.d4 ed4 11.Nd4 Nd4 12.Qd4+=) 10.Nbd2 0–0–0 (10...0–0 11.d4 ed4 12.Nd4 Nd4 13.Bd4=) 11.Nb3 (11.b5 Nb8+/–) 11...g5 (11...Nb8 12.Rc1+=) 12.b5 Nb8 13.ba6 Na6 14.d4 e4 (14...g4 15.Nfd2+/–) 15.d5 Bf5 (15...ef3 16.de6 fe6 17.Bf3+=) 16.Nfd4 h5 (16...Bg6!?+/–) 17.Nf5+– Qf5 18.Nd4 (18.f3!? Qg6+–) 18...Qd7 (18...Qg6 19.Rb1+/–) 19.h3 (19.f3 Nc5+–) 19...Rhg8 (19...Nc5+/–) 20.g4 (20.c5!? dc5 21.Nc6 Qd6+–) 20...hg4 (20...Nc5 A) worse is 21.gh5 g4+= (21...Qh3?! 22.Re1 g4 23.Bf1 Qh5 24.Bg2–+); B) 21.f3+=) 21.Bg4 (21.Nc6! gh3 22.Bf6 Bf6 23.Bg4 bc6 24.dc6 (24.Bd7?! Kd7 25.Qg4 Ke8+/–) 24...Qg4 25.Qg4 Kb8 26.Rab1 Ka7 27.Rb7 Ka8 28.Qe4+–) 21...Ng4= 22.hg4 (22.Qg4 Bf6 23.Rab1 Qg4 24.hg4=) 22...c5 (better is 22...Bf6!? 23.Rb1 Rde8=) 23.Nf5+/– f6 (23...Rde8 24.Qc2+/–) 24.Rb1 (24.Qc2 Rde8 25.Qe4 Nc7+–) 24...Rh8 (24...Rde8 25.Bc3+–) 25.Bc3 (25.Qc2 Rde8+–) 25...Rh3 (25...Rde8!? 26.Qc2+/–) 26.Qc2 Rdh8 27.Qe4 Re8 (27...R3h7 28.Rb6 (28.Ne7?! Re7 29.Qf5 Qf5 30.gf5 Rh4+=) 28...Re8 29.Rd6 Bd6 30.Qe8 Qe8 31.Nd6 Kd7 32.Ne8 Ke8 33.Bf6+–) 28.Kg2 (28.Bf6 Bf8 29.Qd3 Qh7+–) 28...Rhh8 (28...Rh7 29.Rb6 (29.Ne7?! Rhe7 30.Qf5 Qf5 31.gf5 Re4+–) 29...Bf8 30.Qc2+–) 29.Rh1 (29.Qe6 Qe6 30.de6 Bf8 31.Bf6 Rh7+–) 29...Bd8 30.Qf3 Rhg8 (30...Rh1 31.Rh1 (worse is 31.Kh1 Rh8 32.Kg2 Nc7+–) 31...Rf8 32.Qe4+–) 31.Nh6 (31.Rb5 Ref8+–) 31...Rh8 (31...Rg7 32.Qf5+– (32.Bf6?! Rf8+/–)) 32.Qf5 (32.Bf6?! Rhf8 33.Qf5 Qf5 34.Nf5 Rf6+=) 32...Qf5 (32...Rh7 33.Bf6 Bf6 34.Qf6+–) 33.Nf5 (33.gf5?! Rh7+–) 33...Re4 (33...Kc7+–) 34.Nd6 (better is 34.Rh8 Rg4 35.Kh3 Rc4 36.Nd6 Kd7 37.Rb7 Nc7 38.Nc4+–) 34...Kb8 (34...Kc7 35.Ne4 Rh1 36.Rh1+–) 35.Ne4 (35.Rb7 Ka8 36.Rh8 Nb8 37.Rd8 Rg4 38.Kf1 Rg1 39.Kg1 g4 40.Rdb8) 35...Re8 36.Nf6 Bf6 37.Bf6 Rg8 38.Rh8 (38.Rh8 Rh8 39.Bh8+–) 1–0. GuestRMKM – GuestKFJH, freechess.org, 2016.

4.Bc4 Nf6

5.a3 c6 6.h3 b5 7.Bb3 Bb7 8.d3 Qc7 9.e4 d5 10.Nd2 c5 11.Ngf3 Bd6 12.bc5+/– de4?? 13.de4 Qc5=+ 14.0–0 0–0 15.Re1 Nc6 16.Ba2 Rfe8?? 17.Ng5?? Re7?? 18.Nb3+– Qb6 19.Qd6 Rd8 20.Qc5 Qc5 21.Nc5 (21.Nc5 Ba8 22.Na6+–) 1–0. Pasn – pbv1, Live Game Caissa's Web, 2005.

5.Ne2 Nc6 6.b5 ab5 7.Bb5= Bd7 8.0–0 Be7 9.h3 0–0=+ 10.d3 Ra5 11.c4= d5 12.Bc6 Bc6= 13.Be5 dc4=+ 14.dc4?? Re5–+ 15.Nbc3 Rg5 16.Nf4 Qc8 17.Qe2 Bd6 18.g4 Ng4! 19.f3 Ne3 20.Kf2 Bf4 21.Rg1 Qh3 22.Rg5 Qh4 (22...Qh4 23.Kg1 Qg5 24.Kh1 Qh4 25.Kg1 Bf3 26.Qg2 Bg2 27.Rd1 Bh2) 0–1. coloplayah (2170) – kevinjulius (1960), net–chess.com, 2006.

4.d4 ed4

5.Qd4 Nc6 6.Qd2 Be7?? (better is 6...Nf6=) 7.Bg7+– Bf6 8.Bh8 Bh8 9.Nc3 Nb4 10.Rb1 Nc6 11.Nf3 Bg4 (11...Nf6 12.Bd3+–) 12.Be2 (12.Rb7!? Qc8 13.Rb3 Bf3 14.gf3 Nf6+–) 12...Nb4?? (better is 12...b5+–) 13.Rb4 (13.Rb4 Bc8 14.0–0+–) 1–0. Becker,Godelind – Alfert,Michael, desc–online.de, 2006.

5.Bd4 c5 6.Bc3 cb4 7.Bb4 Nc6 8.Bc3 Nf6 9.Nf3 Bg4 10.Be2 Ne4 11.Bb2 Qb6 12.Bc1 g6 13.c3 Bg7 14.Qc2 Bf5 15.Qb2 (15.Nh4 Nb4 16.Qb2 Be6+=) 15...Qc5 (better is 15...Qb2 16.Bb2 Nb4–+) 16.Nd4= (16.Qb7 Rb8 17.Qa6 Bc3 18.Nc3 Qc3 19.Nd2 A) 19...Qa1?! 20.Qc6 Kf8 21.Ne4 Be4 22.Qd6 (worse is 22.Qe4 Qc1 23.Bd1 Qc3 24.Kf1 Rb2–+) 22...Kg7 23.0–0+=; B) 19...Nd2 20.Bd2 Qa1 21.Bd1 Be4–+) 16...b5 17.a3 0–0 18.0–0 Na5 19.f3 Ng5 20.Nd2 Nc4 (better is 20...Rfe8!?+=) 21.Nc4+= bc4 22.Qb4 Rac8 23.Qc5 Rc5 24.e4 Bd7 25.Rb1 Bc8? (25...Ne6!? 26.Be3 Ra5=) 26.Rb6 Rd8 (better is 26...Ne6 27.Be3 Ra5+/–) 27.Nc6 Rd7? (27...Re8 28.Be3 Rb5 29.Rb5 ab5 30.Bg5 Bc3 31.Rd1+–) 28.Be3 Rb5 29.Rb5 ab5 30.Bg5 f6 31.Be3 Bb7 (31...f5 32.Rb1 fe4 33.Rb5+– (worse is 33.fe4 Bb7 34.Nd4 Be4 35.Rb5 d5+–)) 32.Nd4 Ba8 (32...f5 33.Nb5 fe4 34.Bc4 d5 35.Be2+–) 33.Nb5 Bc6 34.Bc4 d5 35.ed5 Bd5 36.Rd1 (36.Rd1 Bc4 37.Rd7 Bb5 38.Rc7+–) 1–0. Didiliuc,Dariana_Gabriela – Malaescu,Adrian, CONPET Cup, 2010.

5.Bd4 Nc6 6.Bc3 Nf6 7.Nf3 Ne4 8.a3 Nc3 9.Nc3 g6 10.Rb1 Bg7 11.Rb3 Be6 12.Nd5 b5 (12...Ne5 13.Ne5 de5 14.c4+=) 13.e4 (13.c4 Ne7=) 13...Ne7 14.Re3 0–0 15.Be2 c6 16.Nf4 Bc8 17.0–0 Bb7 (17...Bh6 18.g3=) 18.Rd3 Nc8 19.Re1 (19.e5 g5 20.Nh5 g4+=) 19...Qf6+= 20.g3 Re8 21.Bf1 a5 22.Bh3 Rd8 (better is 22...ab4 23.ab4 Qb2 24.Bc8 Rec8 25.Rd6 Qb4=) 23.e5+/– Qe7 24.ed6 Qf8 25.Bc8 Rdc8 (25...Bc8 26.Ne5 Bf5 27.Nc6 Bd3 28.Qd3 (worse is 28.cd3 Rd6 29.Na5 Re8+=; 28.Nd8?! ab4 29.ab4 Bc2 30.Qc2 Rd8+/–) 28...ab4 29.Nd8 ba3 30.Nc6+/–) 26.Re7+– Rab8? (better is 26...ab4!? 27.Rb7 ba3+–) 27.Ng5 (27.ba5?! Bf6 28.Re1 Ra8+–) 27...Qd8 (27...Bf6 28.Rf7 Qh6 29.Rf6 Qg5+–) 28.Nf7 Qb6 (28...Qf8 29.Ne6 Qf7 30.Rf7 Kf7 31.d7+–) 29.Ne6 Bf6 (29...Rf8 30.d7 Rf7 31.Re8 Bf8+–) 30.Nh6 Kh8 31.Rf7 (31.Ng5 Qc7 32.dc7 Be7 33.Qa1 Bf6 34.Qf6) 31...Be5 (31...Re8 32.Ng5 Bg7 33.Rg7 Qf2 34.Kf2 Re2 35.Qe2 Rf8 36.Nhf7 Rf7 37.Rf7 ab4 38.Qe8) 32.Qe1 Bd6 33.Qa1 1–0. Arnold,Michael (1710) – Sprandl,Manfred, Rhein Main op 7th, 2004.

4.d4 e4

5.Nc3 d5+= 6.a3 Nf6 7.f3 (7.Nge2 a5+=) 7...h6 (7...Bd6 8.fe4 de4 9.Nge2–/+) 8.fe4+= de4 9.Bc4 c6 (9...a5 10.ba5 Ra5 11.Nge2+=) 10.Nge2= Bg4 (10...b5 11.Ba2=) 11.0–0 (11.h3 Be2 12.Ne2 Nd5=) 11...Nbd7 (11...b5 12.Bb3=) 12.Qe1 (12.h3 Bh5=) 12...Be2 (12...Nb6 13.Bb3 Qe7 14.Qg3+=) 13.Ne2 Be7 (better is 13...Bd6=) 14.Bf7?? (better is 14.Ng3+=) 14...Kf7–+ 15.Qh4 (15.Nc3 Ke8–+) 15...Rf8 (15...Re8!?–+) 16.Qe4–/+ Kg8 (16...Bd6 17.c4–/+) 17.Qe6+= Kh8 (17...Kh7 18.Nf4 Qe8 19.Qh3+=) 18.Nf4 Qe8?? (better is 18...Re8 19.Ng6 Kh7=) 19.Qe7!+/– Nd5 (19...Qe7 20.Ng6 Double attack (20.Ng6 Decoy)) 20.Nd5+– cd5 21.Rf8 Nf8 22.Qb7 Qe3 (22...Rc8 23.c3 Qe3 24.Kh1+–) 23.Kh1 Re8 24.Qa6 Qd2 (24...Qf2 25.Qf1 Qc2 26.Qc1+–) 25.Rf1 Re1 (better is 25...Qc2 26.Qb5 Rd8+–) 26.h3 Rf1 (26...Kg8 27.Re1 Qe1 28.Kh2+–) 27.Qf1 Kg8 (27...Ne6 28.Qd3 Qe1 29.Kh2+–) 28.Qf5 (28.Qf5 Qe1 29.Kh2+–) 1–0. Wall,Bill – Traveler, internet, 2002.

5.d5 c6 6.Nc3 cd5 7.Nd5+= Be6 8.c4 Ne7 9.Ne2 Nd5 10.cd5+/– Bd7 11.Ng3 Be7? 12.Bg7+– Rg8 13.Bc3 Bf6 14.Ne4 Bc3 15.Nc3 Qf6 16.Rc1 Ba4 1–0. guest299 – guest857, ICC, 2003.

5.d5 Nf6=.

4.Nf3 Nc6

5.a3 f5 6.Bc4 (6.d4 e4 7.d5 Nce7=) 6...Nf6 7.Bb3 d5 (better is 7...e4!? 8.Ng5 d5=) 8.Ne5+/– Ne5 9.Be5 Qe7 (9...Bd6 10.d4+/–) 10.d4 Be6 11.Nc3 (11.0–0 c6+/–) 11...0–0–0 (11...c6 12.0–0+/–) 12.0–0 (12.b5 a5+/–) 12...Ne4 (12...c6 13.Qd3+/–) 13.Qd3 (13.Ne4 de4 14.Qe2+–) 13...b5 (better is 13...Qd7!?+/–) 14.f3+– Ng5?! (14...Nc3 15.Qc3 Qd7+–) 15.a4 Qb4 (15...c6 16.ab5 cb5 17.Ra6+–) 16.ab5 Bd6 (16...a5+–) 17.Ra4 Qa4 18.Ba4 Be5 19.ba6 (19.ba6 Rd6 20.de5+–) 1–0. Schellen,Anton – Melquiades,Jay, FICGS, 2006.

5.a3 Bf5 6.d4 Nf6 (6...ed4 7.Bd4 Qd7 (7...Nf6 8.Nc3 Be7 9.Bd3 Bd7 10.0–0 0–0 11.Re1) 8.Bd3 (8.Nc3 Nf6 9.Bd3 Be7 10.Bf5 Qf5 11.0–0) 8...Nf6 9.0–0 (9.Nc3 Be7 10.Bf5 Qf5 11.0–0) 9...Be7 10.Bf5 Qf5 11.Nc3 0–0) 7.Nc3 (better is 7.de5 A) 7...Ne5 8.Nbd2+= a5 (8...Nc6 9.Bd3 Bd3 10.cd3 Be7 11.0–0) 9.Ne5 de5 10.Qf3 Qc8 (10...Bd7 11.b5) 11.e4+= (11.Be5 ab4); B) 7...de5 8.Nbd2 (8.Qd8 Rd8 9.Nbd2 Bc2 10.Rc1 Bf5 11.Ne5) 8...Qe7 9.Bc4 (9.Nc4 e4 10.Nd4 0–0–0 11.Be2) 9...0–0–0 10.0–0 Kb8 11.Qe2+= (11.Qc1 g6)) 7...d5?? (better is 7...ed4 8.ed4 d5= (8...Qe7 9.Be2 d5 10.0–0 0–0–0 11.Re1) 9.Bd3 Qe7 (9...Bd3 10.cd3 Bd6 11.0–0) 10.Ne2 Ne4 (10...g6 11.0–0) 11.0–0 0–0–0) 8.de5+– (worse is 8.Ne5 Qd6+/–) 8...Ne4 9.Nd5 Be7 10.c4 0–0 11.Bd3 (11.Ne7?! Qe7 12.Bd3 Rad8+–) 11...f6 (11...Bg6 12.h4 f5 13.ef6 Bf6 14.Bf6 Nf6 15.Bg6 hg6 16.Qd3+–) 12.Qc2 (worse is 12.Ne7 Ne7 13.Be4 Be4 14.ef6 gf6+–) 12...g6 (12...Nf2 13.Kf2 Bd3 14.Qd3 Ne5 15.Be5 fe5+–) 13.Be4 Ne5 (13...fe5 14.Rd1+–) 14.Bf5 gf5 15.Rd1 (15.Rd1 c6 16.Nf6 Bf6 17.Rd8 Nf3 18.gf3 Rad8 19.Rg1 Kh8 20.Rg5+–) 1–0. Anonymous – Anonymous, internet, 2011.

5.a3 Bg4 6.Be2 Nf6 7.0–0 Be7 8.d3 0–0 9.Nbd2 Qd7 10.Nc4 Bf3 11.Bf3 Rfe8 12.Bc6 Qc6 13.Na5 Qb6 14.d4 e4 15.d5 c5 16.dc6 bc6 17.Rc1 c5 18.c3 Rab8 19.Qe2 d5 20.Nb3 cb4 21.cb4 a5 22.Na5 Rec8 23.Bf6 Bf6 24.Qg4 Rc1 25.Rc1 Qd8 26.g3 Bb2 27.Nc6 Qc7 28.Rc5 Ba3 29.Nd4 Qb7 30.Nf5 Bb2 31.Nd6 Qa6 32.Qd7 f6? (32...Rf8 33.b5 Qa1 34.Kg2 Ba3 35.Rc6 Bd6 36.Rd6 Qd1 37.Qf5 g6 38.Qf4 Qd3 39.b6 Rb8 40.Rg6 fg6 41.Qb8 Kg7 42.b7 Qe2 43.Qf4+–) 33.Qe6 (33...Kh8 (33...Kf8 34.Qf7) 34.Nf7 Kg8 35.Nh6 Kh8 (35...Kf8 36.Qf7) 36.Qg8 Rg8 37.Nf7) 1–0. Plock – Duben, blitz 1996.

5.b5 ab5 6.Bb5 e4=.

5.b5 ab5 6.Bb5 Bg4=.

5.Nc3 Nb4 6.Be2 Nf6+= (6...f5 7.0–0 (7.a3 Nc6 8.0–0 Nf6 9.Ng5 d5 10.f4 Bd6 11.fe5 Ne5 12.Nf3–/+; 7.Rb1 Be6 8.a3 Na2 9.0–0 Nc3 10.Bc3 Rb8 11.Bb2 b5 12.c4+=; 7.Rc1 Be6 8.a3 Nc6 9.d4 ed4 10.ed4 d5 11.0–0 Nf6 12.Ng5+=) 7...Be6 8.d4 e4 9.d5 Bf7 10.a3 Nd5 11.Nd5 ef3 12.Bf3=) 7.0–0 (7.e4 Be7 8.d4 ed4 9.Nd4 Bd7 10.0–0 0–0 11.a3 Nc6 12.Nc6+=; 7.a3 Nc6 8.0–0 Be7 9.e4 Bg4 10.Ne1 Be6 11.Nd3 0–0 12.f4–/+) 7...Nc6 (7...Be7 8.e4 0–0 9.d4 d5 10.de5 Ne4 11.a3 Nc3 12.Bc3–/+) 8.Rb1 (8.e4 Bg4 9.Ng5 Be2 10.Qe2 Nd4 11.Qd3 h6 12.Nf3+=) 8...d5 (8...Be7 9.e4 0–0 10.d4 ed4 11.Nd4 Nd4 12.Qd4+=) 9.d4 e4 10.Ne5 (10.Nd2 Bb4 11.a3 Be7 12.Na4–/+) 10...Ne5?? (better is 10...Bd6 A) 11.f4 Ne7 (11...0–0+= 12.Nc6–/+) 12.Na4–/+; B) 11.Nc6 bc6 12.Na4+=; 10...Qd6 11.Na4 b5 12.Nc5–/+) 11.de5+– Ng4?? (better is 11...Nd7 12.Qd5 Nc5 13.Qd8 Kd8 14.Rfd1 Ke8+–) 12.Bg4 Bg4 13.Qg4 Rb8 (13...c6 14.f3 h5 15.Qf4 ef3 16.Rf3+– (worse is 16.gf3 Rh6+–)) 14.e6 f6 (14...h5 15.Qf5 Qf6 16.Qf6 gf6 17.Nd5+–) 15.Rfd1 c6 16.Ne4! Qc8 (16...de4 17.Rd4 Double attack (17.Rd8 Pinning; 17.Rd8 Deflection; 17.Rd4 Decoy)) 17.Nf6! gf6 18.Bf6 Bg7 19.Qh5 Kf8 20.Qf7 1–0. pierret@chesscube.com – edonis011@chesscube.com, ChessCube Game, 2011.

5.c4 Nb4+= 6.Qa4 Nc6 7.d4 e4 (7...ed4 8.ed4 d5 9.Ne5–/+) 8.Nfd2+= Bd7 9.d5 Ne5 10.Qc2 f5 11.Be2 Nf6 12.0–0 Qe7 13.Nb3 g6 14.c5 (14.Bd4 Bg7+=) 14...Ba4 (14...Nd5 15.Rd1 Qf7 16.cd6 Bd6 17.Nc5–/+) 15.N1d2 (15.Nc3!? Bb3 16.Qb3+=) 15...Bg7 16.Qc3 (16.Rad1 Nd5 17.cd6 cd6 18.Ne4 fe4 19.Rd5 Bc6+=) 16...Bb3 (better is 16...Nd5 17.Qc1 Bb5 18.cd6 Qd6–+) 17.Qb3+= 0–0 18.Be5 (better is 18.Rfc1+=) 18...de5?? (better is 18...Qe5 19.Rad1 Nd7 (19...Qd5?? 20.Bc4 Qc4 21.Nc4+–; 19...Nd5?! 20.Ne4 fe4 21.Rd5=) 20.Qb7 A) 20...dc5 21.Nc4 (worse is 21.Ba6 Rfb8 22.Qc6 Qd6+=) 21...Qe7 22.d6 (worse is 22.Qc7 Rfc8 23.Qg3 Rab8+=) 22...cd6 23.Rd6+/–; B) 20...Nc5 21.Qc7 Rfc8= (21...Qd5 22.Bc4 Qc4 23.Nc4+–)) 19.d6+– Qf7 20.Bc4 (20.Bc4 cd6 21.Bf7 Rf7 22.cd6+–; 20.Qb7?! cd6 21.Qf7 Rf7 22.cd6 Rd7=) 1–0. Flazinski,Pawel – Plebanczyk,Bronislaw, Leba Poland, 2002.

5.a3 Nf6

6.c4 e4 7.Nd4=.

6.c4 Be6 7.Nc3 Be7 (7...Bg4 8.h3 Be6 9.d4 ed4 10.Nd4 Nd4 11.Qd4=) 8.d4 ed4 9.ed4 0–0?? (better is 9...d5 10.c5 0–0=) 10.d5+– Nb4 (10...a5 11.b5 Bg4 12.dc6 bc6 13.Bd3+–) 11.de6 Nc6 12.ef7 Rf7 (12...Kh8 13.Bd3+–) 13.Ng5 Rf8 (13...Qe8 14.Nf7 Qf7 15.Be2+–) 14.Ne6 (14.Ne6 Qd7 15.Nf8 Rf8 16.Be2+–) 1–0. Wall,Bill – MSGRanger, internet, 2003.

6.c4 Be7 7.Be2 Bf5 8.Nc3 0–0 9.0–0 (9.d4 ed4 10.Nd4 Be6+=) 9...Re8 (9...e4 10.Ne1 d5=) 10.e4 (10.d4 ed4 11.Nd4 Nd4 12.Qd4 c6+=) 10...Be6 (10...Ne4!? 11.Nd5 Nf6–/+) 11.Ng5 (11.d4 Bg4+=) 11...h6 12.Ne6 fe6 13.Bh5 Nh5 14.Qh5 Bf6 15.Ne2 Rf8 16.Ng3 Nd4 17.Bd4 ed4 18.d3 e5 19.Nf5 Qd7 20.h4 Qf7 21.Qg4 Kh7 22.Qh3 g6 23.Ng3 Qe7 24.h5+/– Qf7 25.hg6 Qg6 26.Nf5 Rg8 27.g3 Rad8 28.Kh1 Rdf8 29.Rg1 Bg5 30.f4 Bf6 31.Raf1 b6 32.Rg2 Bg7 33.Rh2 Rf7 34.g4 ef4 35.Rf4 Bf8?? 36.Rg2 Qg5 37.Qh2 Rg6 38.Rff2 c5 39.b5 ab5–/+ 40.cb5 Qc1 41.Rg1 Qe3?? 42.g5 Qd3–+ 43.Nh6?? Qe4 44.Rgg2 Bh6 45.Rf7+– Kg8 46.gh6?? Kf7–+ 47.h7 Qe1 48.Rg1 Qe4 49.Rg2 Qe1 50.Rg1= (50...Rg1 51.Qg1 Qe4 52.Qg2 Qh7 53.Kg1 Qb1 54.Kh2–+) –+. maxii – Talman, Live Game Caissa's Web, 2004.

6.c4 Bg4 7.Nc3 =.

6.d3 Bg4 7.Be2 Be7 8.0–0 0–0 9.h3 Bh5 10.Nbd2 Bg6 11.c4 d5 (11...Nd7 12.d4=) 12.cd5 (12.Ne5 Ne5 13.Be5 Re8+/–) 12...Nd5 (12...Qd5!? 13.Qb3 Qb3 14.Nb3 Nd7=) 13.e4 Nf6 14.Ne5 Ne5 15.Be5 Bd6 16.Bd6 cd6 17.Nc4 (17.f4!? h6 18.f5 Qb6 19.Kh2+/–) 17...Re8 18.f3 h6 19.d4 White plans e5 19...b5 20.Ne3 d5 21.e5 Nd7 (21...Nh5 22.a4 Nf4 23.ab5+=) 22.Bd3 (22.a4 ba4 23.Qa4 Ne5 24.de5 Re5=) 22...Nb6 23.Bg6 fg6 24.Rc1 Rc8 25.Qd3 Nc4 26.f4 Rf8 27.Nc4 dc4 28.Qg6 Qd4 29.Kh1 c3 30.Qe6 Kh8 31.Rcd1 (31.Qa6!? Qd5 32.Rcd1+–) 31...Qc4+/– 32.Qc4 bc4? (better is 32...Rc4 33.e6 c2+/–) 33.Rc1+– c2 34.Rc2 c3 (34...Kg8 35.a4+–) 35.g3 (35.Rf3!? Rc4+–) 35...Rfd8 36.Rff2 (36.f5 Rd3 37.Kg2 Kg8+–) 36...Rd3 37.Kg2 Rcd8 38.e6 Rd2?? (38...Kg8+–) 39.Rc3 Rf2 40.Kf2 Rd2 (40...Kg8 41.f5+–) 41.Kf3 Rd8 42.f5 Rf8 43.g4 g6 (43...Kg8 44.Ke4+–) 44.Ke4 gf5 45.gf5 h5 46.e7 Re8 47.f6 Kg8 48.Ke5 (48.Rg3 Kf7 49.Kf5 Rc8 50.Rg7 Ke8 51.Rg8 Kd7 52.Rc8 Kc8 53.e8Q Kb7 54.f7 h4 55.Qd7 Kb6 56.f8Q a5 57.Qfd6) 48...Kf7 49.Rd3 h4 50.Rd8 Re7 51.fe7 Ke7 52.Rh8 Kf7 53.Rh4 Kg6 54.Rg4 Kh5 55.a4 (55.Kf6 a5 56.ba5 Kh6 57.Rh4) 55...Kh6 56.b5 (56.Kf6 Kh7 57.b5 ab5 58.Rh4 Kg8 59.ab5 Kf8 60.Rh8) 56...a5 (56...Kh7 57.ba6 Kh6 58.a7 Kh7 59.Kf6 Kh8 60.a8Q Kh7 61.Rh4) 57.b6 (57.Kf6 Kh7 58.Rh4 Kg8 59.b6 Kf8 60.Rh8) 57...Kh5 (57...Kh7 58.b7 Kh6 59.b8Q Kh7 60.Qg8 Kh6 61.Qg6) 58.b7 Kh6 59.b8Q Kh5 (59...Kh7 60.Qg8 Kh6 61.Qg6) 60.Qh8 1–0. Fournier,Frederic (1725) – funfminuten, Active, 2005.

6.d4 e4 7.d5 Ne7 8.Bf6 gf6 =.

6.Be2 Bd7 7.0–0 e4 8.Nd4 Ne5 9.c4 (9.f3 c5 10.Nb3 cb4 11.ab4 ef3 12.Bf3 Qb6+=) 9...Be7 10.Nc3 (10.f4 Nc6=) 10...c6 (10...c5 11.Nc2=) 11.Qc2 (better is 11.f4 ef3 12.Nf3=) 11...d5? (11...c5 12.Nb3 Bf5 13.f3 ef3 14.Qf5 fe2 15.Ne2 cb4 16.Be5 de5 17.Qe5 ba3 18.c5=) 12.c5 (12.cd5!? Rc8 13.Qb1+/–) 12...b6 (12...a5 13.f4 ef3 14.Nf3 Nf3 15.Bf3+=) 13.cb6 Qb6 14.Na4 Qb7 15.Nc5 Bc5 16.bc5 Qc7 17.Rab1 Ke7 (17...Bg4 18.f3 ef3 19.gf3+/–) 18.a4 (18.f4 Ng6+/–) 18...Rhb8 19.Ba3 (19.f3 Kd8+/–) 19...g6 (better is 19...Bg4!?=) 20.Rb8+/– Qb8 21.Rb1 Qc7 22.h3 (22.Rb6 Bc8+/–) 22...h5 (22...g5 23.Rb6+/–) 23.f3 (23.Rb6!?+/–) 23...ef3+= 24.Nf3 Ne4 (24...Nf3 25.Bf3 g5 26.Bb2+=) 25.Ne5 (25.Bb2 Nf3 26.Bf3 Ng5+=) 25...Qe5+= 26.Rb7 (26.Bd3 Bf5+=) 26...Ke8 (26...Qg3=) 27.Bf3 (27.Bd3 Bh3 28.Be4 Bc8+/–) 27...Bf5 (27...Ng5 28.Be2 Nh3 29.Kh1 Qg3–+) 28.Be4= Be4 (worse is 28...Qe4 29.Qc3 d4 30.ed4+/–) 29.Qb3?? (better is 29.Qb2 Qb2 30.Bb2=) 29...Qg3–+ (29...Qg3 30.Kf1 Bg2 31.Ke2 Bh3–+ (31...Qh3?! 32.Rb8 Rb8 33.Qb8 Kd7 34.Qd6 Ke8 35.Qc6 Qd7 36.Qa8 Qd8 37.Qa6+=)) 0–1. Neumann,Frank – Ventura,Bob, OP–2012–0–02281, 2012.

6.Be2 e4 7.Nd4 Nd4 8.Bd4 Bg4?? (better is 8...c5 9.Bc3 (9.Bf6 Qf6 10.Nc3 Qg6 11.g3 Be6 12.bc5 dc5 13.f3 0–0–0) 9...d5= (9...Be7 10.Bf6 Bf6 11.Nc3 0–0 12.0–0 Bf5 13.Bg4 Qd7) 10.0–0 d4 11.Bb2 Be6 12.ed4 cd4 13.d3 e3; 8...Be7 9.Nc3 0–0 10.0–0 c5 11.bc5 dc5 12.Be5 Bd6 13.Bf6 Qf6; 8...Be6 9.Nc3 Be7 10.f3 ef3 11.Bf3 d5 12.0–0 0–0 13.Qe2 Qd6; 8...d5 9.Nc3 a5 10.0–0 Be7 11.Qb1 ab4 12.ab4 Ra1 13.Qa1 0–0; 8...Bd7 9.Nc3 Be7 10.f3 d5 11.0–0 0–0 12.fe4 de4 13.Qe1 Re8; 8...a5 9.Nc3 Be7 10.0–0 0–0 11.f3 ef3 12.Rf3 d5 13.Rf4 Be6) 9.Bg4+– Ng4 10.Qg4 (10.Qg4 d5 11.Nc3+– (11.Bg7?! Rg8+=)) 1–0. marere – strobem, internet, 2011.

6.Be2 Be7 7.0–0 0–0 8.d3 b5 9.Nbd2 Re8 10.c4 Bf8 11.cb5 ab5 12.d4 e4 13.Ne1 (13.Bb5 Bd7 14.Ne1 d5+/–) 13...d5 (13...Na7!?=) 14.Bb5+/– Bd7 15.Ba4 (15.Be2 Nb8+/–) 15...Bd6+= 16.Bb3 Ne7 17.Qc2 (17.Nc2 Bb5 18.Re1 Bd3+=) 17...c6 (better is 17...Ng4 18.g3 Bb5–/+) 18.g3 Bh3 19.Ng2 Rc8 20.Rac1 Qc7 21.f4 ef3 22.Nf3 Nh5?? (22...Bf5 23.Qd1+=) 23.Rf2?? (23.Ng5 Bf5 24.Rf5 Nf5 25.Qf5 g6+–) 23...Nf5?? (23...Bf5 24.Qe2 Nf6 25.Ne5+=) 24.Qd2?? (24.Ng5 Bg3 25.hg3 (25.Nh3?! Bf2 26.Qf2 Nd6+/–; 25.Rf5 Bh2 26.Kh1 Bf5 27.Qc6 Qc6 28.Rc6 Rc6 29.Bd5 Rc7 30.Kh2 Nf6–+) 25...Qg3 26.Rf5 (26.Nh3?! Ne3 27.Qd3 Nf6+–) 26...Bg2 27.Qg2 Qe3 28.Qf2 Qb3 29.Rf3+– (29.Rf7?! Nf6+/–; 29.Nf7?! Qg3 30.Qg3 Ng3+/–)) 24...Bg2+= 25.Kg2 Ne3 26.Kg1 Bg3 27.hg3? (27.Re2 Nf5 28.Re8 Re8 29.Qg5= (29.hg3? Qg3 30.Qg2 Qg2 31.Kg2 Nf4 32.Kh1 Re2–+)) 27...Qg3–+ 28.Kh1 Ng4 29.Rg2?? (29.Rc2 Re2! 30.Qe2 Qh3 31.Nh2 Ng3 32.Kg1 Ne2 33.Rfe2 Nh2 34.Bd5 cd5 35.Rc8 Qc8 36.Rh2–+) 29...Qf3 30.Bd1 (30.Kg1 Nf4 31.Ba4–+) 30...Ng3 31.Kg1 Qe3 (31...Qf1) 32.Qe3+/– Re3 (32...Ne3!? 33.Rg3 Nd1 34.Rd1 Re6+/–) 33.Bg4+– Rce8 1–0. Fournier,Frederic – emporda, Active, 2006.

6.Be2 Bg4 7.0–0 Be7 8.c4 e4 9.Nd4 Ne5 (9...Be2 10.Qe2 Ne5 11.f3=) 10.Bg4 Nfg4 11.Qe2 (11.Qc2 Nd3+=) 11...Qd7 12.f3 c5 (better is 12...ef3!? 13.gf3 Nf6=) 13.fg4+/– cd4 14.Bd4 Ng4 15.Bg7 Rg8 16.Bd4 Qe6 17.Nc3 Qh6 18.h3 Nf6 (18...Ne5 19.Be5 de5 20.Rf5 (20.Ne4?! Qh3 21.Qf3 Qf3 22.Rf3 Rg4+/–) 20...Qh3 21.Re5+–) 19.Qf2 (better is 19.Rad1+–) 19...Qh3?? (better is 19...Qg6+–) 20.Bf6 Bf6 21.Ne4 0–0–0 (21...Qg2 22.Qg2 Rg2 23.Kg2 Ba1 24.Ra1+–) 22.Nf6 Rg5 23.Ne4 (better is 23.Rac1 h5+–) 23...Rg4 24.Qf5 Kb8 25.Rf2 (better is 25.g3 Rg3 26.Ng3 Qg3 27.Kh1 Qh4 28.Kg2 Rg8 29.Kf3 Rg3 30.Ke2 Qc4 31.Kd1+–) 25...Rg2–/+ 26.Rg2 Qf5 27.Nc3 (27.d3 b5 28.Rf1 Qe5 29.Rf7 bc4=) 27...h5 (27...Qd3!?–/+) 28.Rf1+= Qh7 29.Rf3 Rg8 0–1. Iglesias,Ivan – Gimenez,Pablo, Caspe–EEPP, 2002.

4.Nf3 e4

5.Nd4 b5 6.c4 Bd7 (better is 6...bc4!? 7.Bc4 d5=) 7.Qc2+/– Nf6 8.Nc3 c5 (8...bc4!? 9.Bc4 c6 10.Ne4 d5 11.Nf6 Qf6+/–) 9.bc5 dc5 10.Nb3 (10.Ne4!? Qe7 11.Nf6 gf6+–) 10...Bf5 11.cb5 a5 12.Na4 Nbd7 13.Nbc5?? (better is 13.Rc1+/–) 13...Nc5–/+ 14.Nc5 Bc5?? (better is 14...Rc8 15.Bd4 Bc5 16.Bc5 Nd7–/+) 15.Qc5+– Rc8 (15...Bd7+–) 16.Qf5 0–0 (16...Rc2 17.Qe5 Kf8 18.Bc3+–) 17.Bf6 gf6 (17...Qf6 18.Qf6 gf6 19.d3+–) 18.Qe4 Qd6 (18...Re8 19.Qg4 Kh8 20.Rd1+–) 19.Bd3 Rcd8 (19...Rfd8 20.Qh7 Kf8+–) 20.Qh7 1–0. GuestHJQM – GuestCTGX, freechess.org, 2017.

5.Nd4 c5 6.bc5 dc5 7.Nb3 (7.Ne2 Bg4 8.h3 Bf5 9.Ng3=) 7...Nf6 8.Be2 (8.d3 c4 9.Nd4=) 8...Be7 (8...Bd6 9.d3=; 8...Nc6 9.0–0=) 9.0–0 (9.f3=) 9...b6 (9...Qc7 10.d3=) 10.d3 (10.f3 Bb7=) 10...Bb7 (10...ed3 11.Qd3 0–0 12.Rd1=) 11.N1d2 (11.de4 Qd1 12.Rd1 Be4+=) 11...0–0 12.d4 (12.de4 Ne4 13.Bf3 Nd2 14.Bb7 Ra7= (worse is 14...Nf1 15.Ba8 c4 16.Qd8 Rd8 17.Nd4+–)) 12...Qc7 13.c4 (13.dc5 bc5 14.Nc4 Nbd7=) 13...Rd8 (13...cd4 14.ed4 Bd6 15.h3+=) 14.d5= b5 15.Qc2 bc4 16.Bc4 Nd5 (worse is 16...Rd5 17.Bd5 Bd5 18.Bf6 Bf6 19.Rad1+/– (worse is 19.Nc5 Ba1 20.Ra1 Nd7+=; 19.Ne4 Ba1 20.Ra1 Qc6 21.Nec5 Kh8+–)) 17.Bd5 (17.Ne4!? Nd7 18.Rac1+=) 17...Bd5+= 18.Ne4 Be4 (18...Qc6 19.f3+=) 19.Qe4= Nd7?? (19...Nc6 20.Rfc1 Bd6 21.Nc5 Bh2 22.Kh1+=) 20.Rac1 (better is 20.Qe7 c4 21.Rfc1+–) 20...Re8 (better is 20...Bd6!?=) 21.Qg4+/– Ne5 22.Qh5 (better is 22.Qg3!? Bd6 23.f4+/–) 22...Nd3= 23.Rc2 Nb2 24.Rb2 Rab8 25.Rc2 c4 (better is 25...Rb6!? 26.h3 Bd6=) 26.Rfc1+/– Rb5 (26...Rb4 27.Nd2+/–) 27.Qe2 (27.Qg4 Ba3 28.Rc4 Qe5+/–) 27...Ba3 28.Rc4 Qe5 29.R1c2 a5 30.g3 Qd5 (30...Rd8 31.e4+/–) 31.Rd4 Qe5 32.Qc4 Rb4 33.Qc5 Rb3 34.Qe5 Rb1 (34...Re5?? 35.Rd8 Bf8 36.ab3+–) 35.Kg2 Re5 36.Rd8 Bf8 37.Rcc8 g6 38.Rf8 Kg7 39.Rfe8 (39.Rg8 Kf6 40.Rc6 Re6+/–) 39...Rf5?? (better is 39...Re8 40.Re8 Ra1+=) 40.g4 Rf6?? (better is 40...Rg5 41.h3 h5 42.Rg8 Kf6 43.Rc6 Ke7 44.Rc7 Ke6 45.Re8 Kd6 46.Rf7 hg4+/–) 41.Re5 (41.g5 h6 42.Rg8 Kh7 43.Rh8 Kg7 44.gh6) 41...Rb2+= 42.Ra5 Rff2 43.Kg3 Ra2 (43...Rg2!? 44.Kf4 Rbf2 45.Ke5 Rg4–/+) 44.Ra2= Ra2 45.h4 Re2 46.Re8 f6 (46...f5 47.Kf3 Re1 48.g5=) 47.Re7+= Kg8 48.e4 Kf8 (48...h5 49.Kf3 Re1 50.gh5 gh5 51.Re6=) 49.Rh7+= Re4 50.h5 gh5 51.Rh5 (51.gh5 f5=) 51...Re5 52.Kf4 Rh5 53.gh5 Kg7 54.Kf5 Kh6 ½–½. Ruhle,Ernst Albrecht – Kunert,Helmut, Schwarzach op–C, 2004.

5.Nd4 c5 6.bc5 dc5 7.Ne2=.

5.Nd4 Nf6 6.c4 (6.Be2 c5 7.bc5 dc5 8.Nb3 Nc6 9.0–0=; 6.Nc3 c5 7.bc5 dc5 8.Nb3 Be6 9.f3=) 6...c5 7.Nc2 d5 8.Bf6 Qf6 9.Nc3=.

4.Nf3 Be7

5.Bc4 Nf6+= 6.0–0 (6.b5 ab5 7.Bb5 c6+=) 6...Bg4 (6...e4!? 7.Nd4 d5–/+) 7.h3= Bh5 8.g4 (8.Be2 0–0=) 8...Bg6+= 9.d3 Nbd7 (9...Nc6 10.a3+=) 10.Nc3 0–0 (10...c6 11.Bb3+=) 11.Nh4= Ng4?? (better is 11...c6 12.Ng6 hg6=) 12.Ng6+– Ne3? (12...hg6 13.Qg4 c6+–) 13.Ne7 (13.fe3?! hg6 14.Qf3 Nf6 15.Qb7 Rb8 16.Qa6 Rb4+–) 13...Qe7 14.fe3 Qg5 (14...Nb6 15.Qg4+–) 15.Kh2 Qe3 (15...Nb6 16.Ne4 Qe7 17.Bb3+–) 16.Nd5 Qh6 (16...Qg5 17.Qg4 Qg4 18.hg4+–) 17.Nc7 (17.Nc7 Rac8 18.Nd5+–) 1–0. Wall,Bill – Volistads, internet, 2005.

5.d4 e4 6.Nfd2 f5 7.c4 Nf6 8.Nc3 Be6 9.Be2 0–0 10.a3 Kh8 11.0–0 d5 12.cd5 Nd5 13.Nc4 Nd7 14.Ne5 Bd6 15.Bc4?? (better is 15.Nd5 Bd5 16.Nc4=) 15...Nc3–+ (15...Ne5 16.Bd5 Nf3 17.Kh1 Bh2 18.g3 (18.Be6?? Qh4 19.Bf5 Rf5 20.gf3 Rg5 21.f4 Bf4; 18.gf3 Qh4 19.Kg2 Qg5 20.Kh1 Rf6–+) 18...Bd5 19.Nd5 Qd5 20.Kg2–+) 16.Bc3 Ne5 17.Be6? (17.de5 Bc4 18.ed6 Bf1 19.Qd4–+) 17...Nf3 18.gf3 (18.Kh1 Bh2 19.g3–+ (19.gf3 Qh4 20.Kg2 Qg5 21.Kh1 Rf6 22.Bf7 Rh6 23.Bh5 Rh5 24.fe4 Rh6 25.e5 Be5 26.Qh5 Rh5)) 18...Bh2 19.Kh2 (19.Kh1 Qh4 20.Kg2 Qg5 21.Kh1 Rf6 22.fe4 Rh6 23.Bf7 g6 24.Bg6 Qg6 25.f4 Bf4 26.Qh5 Rh5) 19...Qh4 20.Kg2 (20.Kg1 Qg5 21.Kh2 Rf6 22.Bf5 Rh6 23.Bh3 Qh4 24.fe4 Qh3 25.Kg1 Qh2) 20...Qg5 21.Kh2 Rf6 22.Bf5 Rh6 23.Bh3 Qh4 24.Kg1 (24.fe4 Qh3 25.Kg1 Qh2) 24...Qh3 25.Re1 (25.fe4 Qh2) 25...Rg6 0–1. Stoyanov,Georgi (1615) – Dochev,Delyan (1785), 140th MGU Open, 2015.

5.Be2 Nf6=.

4.Nf3 Nf6

5.a3 =.

5.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 a6 5.Nf3).

5.d4 e4 6.Nfd2 d5 7.a3 Bd6 8.c4= c6 9.c5 Bc7 10.Be2 a5 11.b5+= cb5 12.Bb5 Bd7 13.Bd7 Qd7 14.0–0 0–0 15.f4 Nc6=+ 16.h3 Qf5 17.g4 Qg6 18.Nc3 Rfd8 19.Qe1 b5 20.Nb5+= Rd7 21.Nc7 Rc7 22.Kh2 Rb7 23.Bc3 a4 24.Qh4 Ne8 25.g5 f5 26.Rg1 Nc7= 27.Rgb1 Rab8 28.Rb7 Rb7 29.Rb1 Rb1 30.Nb1 Nb5 31.Bb2 Na5= 32.Nd2 h6? 33.gh6+– Qf6 34.Qe1 Nc6 35.hg7+– Qg7 36.Qg3 Na5 37.Qe1 Nc6 38.Qg3 Qg3?? 39.Kg3+– Kg7 40.Nb1 Na5 41.Kf2 Kh6 42.Kg3 Kh5?? 43.Nc3+– Nc7 44.Na4 Nc4 45.Bc1 Nb5 46.Nb6 Nc7 47.a4 Kg6 48.Nc4 dc4 49.Bd2 Nd5 50.a5 c3 51.Bc1 c2 52.a6 Nc7 53.a7 Kf6 54.d5! Na8 55.Kf2 Ke7 56.d6 Kd7 57.h4 Kc6 58.h5 Kb7 59.h6 (59.h6 Kc6 60.h7 Nc7 61.dc7 Kb5 62.h8Q Kb4 63.Qb2 Kc4 64.Qc2 Kd5 65.Qb3 Kc5 66.c8Q Kd6 67.Ba3#) 1–0. nbh999 (2045) – Lillis (1735), ChessWorld.net, 2003.

5.h3 Be6 6.d4 Be7 7.Bd3?? Nc6?? 8.0–0? h6?? 9.b5 Nb4 10.de5+= de5 11.Ne5 Nd3= 12.cd3 ab5 13.Nc3 c6 14.Ne4 Ba2 15.Ng4 b4?? 16.Ngf6+/– gf6 17.Qf3 0–0 18.Nf6 Bf6+= 19.Bf6 Qd7?? 20.Qg3 (20.Qg3 Qg4 21.Qg4 Kh7 22.Qg7) 1–0. gtate (1900) – jaronson (1940), net–chess.com, 2005.

4.Nf3 Bg4

5.Be2 e4 6.Nd4 Be2 7.Qe2 d5 8.a3 Nf6 9.0–0 Be7 10.d3 0–0 11.Nc3 ed3 12.Qd3 Ng4 13.Nf3 c6+= 14.h3 Nf6= 15.Ne2 Nbd7 16.Ne5 Ne5 17.Be5 Bd6 18.Bd6 Qd6 19.Rac1 b5 20.c4 Rfd8 21.cd5 cd5 22.Rfd1 Ra7 23.Nf4 h6 24.Rc5 Rad7 25.Ne2 Ne4 26.Rc2 Nf6 27.Ng3 g6 28.Rcd2 Ne4?? 29.Ne4+– de4 30.Qd6 Rd6 31.Rd6 (31.Rd6 Ra8 32.R1d4+–) 1–0. valpa – Nylson, playchess.de, 2003.

5.Be2 Be7 6.c4 Bd7 7.d4 e4 8.Nfd2 f5 9.Nc3 Nf6 10.a4 c6 11.Qb3 Be6 12.d5 Bf7 13.0–0 Nbd7 14.a5 0–0 15.f3 ef3 16.Rf3 g6 17.Rh3 Ne5 18.Nf3 Nfg4 19.Nd4 Qd7 20.Rf1 Bg5 The backward pawn on e3 becomes a target 21.Bc1 Be7 (21...Rae8 22.e4 Bc1 23.Rc1 fe4 24.Ne4+=) 22.Na4 (22.e4!? fe4 23.Ne4+/–) 22...Rae8= 23.Nb6 Qc7 24.e4 (24.Bb2=) 24...Bf6 (better is 24...fe4 25.Qb1 cd5 26.cd5 Bf6+=) 25.ef5+/– Nd7 26.Bg4 (26.Ne6!? Be6 A) 27.fe6 Bd4 28.Re3 A1) worse is 28...Be3 29.Be3 Rf1 30.Bf1 Nb6 31.Bb6+= (worse is 31.ab6 Qg7 32.h3 Ne3 33.Qe3 cd5–/+); A2) 28...Rf1 29.Kf1 A21) worse is 29...Nh2 30.Kg1 Nb6 31.ab6+/– (worse is 31.Kh2 Be3 32.Be3 Nc8+=); A22) 29...Be3 30.Be3 A221) 30...Nh2? 31.Kg1 Nb6 32.Bb6+– (32.Kh2 Nc8+=); A222) 30...Ne3 31.Qe3 Nb6 32.Qb6 Rf8 33.Bf3 Qb6 34.ab6 cd5+/–; B) 27.de6?! Bd4 28.Kh1 Rf5=; C) 27.Bg4 Bf5 28.Bf5 Bd4 29.Be3 Re3 30.Re3 Rf5 31.Rf5 gf5 32.Kf1 Be3 33.Qe3+/–) 26...Bd4+= 27.Kh1 Nb6 28.ab6 Qb6 29.fg6 Bg6 30.Rhf3 Rf3 31.Qf3 (worse is 31.Bf3 c5 32.b5 Qa5+=) 31...Bg7 (31...Qb4 32.Bh6 Bg7 33.Bg7 Kg7 34.Qf6 Kh6 35.Bd7+/–) 32.Be6 (better is 32.Bd7!? Rd8 33.dc6 bc6 34.Bc6+–) 32...Kh8+= 33.Qb3 c5 (33...Qd4 34.Rd1 Qf2 35.Qe3–/+) 34.b5+= ab5 35.cb5 Ra8 36.Bb2 Bd4 (36...Qc7 37.Qa3 Re8 38.Rf6+/–) 37.Bc3 Kg7 38.Qb2 (38.Bd4!? cd4 39.Qf3+/–) 38...Rf8+= 39.Rd1 Rf4 (39...Bc3 40.Qc3 Kh6 41.Qd2 Kg7 42.Qb2 Kh6 43.Qb3+=) 40.h3 Re4 41.Rf1 Re3?? (41...Qd8 42.Bd4 Rd4 43.Qc3+/–) 42.Bd4 (better is 42.Qf2 Rh3 43.Bh3+–) 42...cd4 43.Qf2 Qd8 44.Re1?? (44.Rc1+–) 44...Qb6?? (44...Qf6 45.Qd2=) 45.Qh4?? (better is 45.Rc1 Qd8 46.b6+–) 45...Re4?? (better is 45...Re1 46.Qe1 Qb5+=) 46.Qe7 Kh6 (46...Bf7 47.Qf7 Kh6 48.Qf6 Kh5 49.Bf7) 47.Rf1 (47.Re4 Qd8 48.Rh4 Bh5 49.Qd8 Kg6 50.Qg8 Kh6 51.g4 d3 52.Rh5) 47...Qb5 48.Qf8 Kg5 49.g3 (49.Rf5 Bf5 50.Qf5 Kh4 51.Kh2 Qd3 52.Qf6 Kh5 53.Bf7) 49...Re6 (49...Qf1 50.Qf1 Kh6 51.Qf8 Kg5 52.h4 Rh4 53.gh4 Kh4 54.Qf4 Kh5 55.Bg4 Kh4 56.Be2 Kh3 57.Qg4) 50.de6 (50.Qf4 Kh5 51.Qh4) 50...Qd5 (50...Qe5 51.Rf4 Qe1 (51...Qe6?? 52.Rg4 Qg4 53.hg4+–) 52.Kh2 Qe2 53.Rf2 Qe5+–) 51.Kh2 Qa2 (51...Qe5+–) 52.Rf2 Qe6 53.Qf4 Kh5 54.Qh4 1–0. Poschmann,Hans – Meyts,Jozef Adolf, Wch Seniors, 1998.

5.Be2 Bf3 6.Bf3 c6 7.0–0 Nd7 8.c4 Ngf6 9.a4 d5 10.cd5 cd5 11.b5 ab5 12.ab5 Bc5? (better is 12...Ra1!? 13.Ba1 e4=) 13.d4 Bd6 14.de5 Ne5 15.Bd5 Nd5?? (15...Ra1 16.Ba1 0–0 (16...Nd5? 17.Qd5 Bb8 18.Qb7+–) 17.Bb7 Qc7+/–) 16.Qd5 (better is 16.Ra8 Qa8 17.Qd5+–) 16...Qd7?? (16...Ra1 17.Be5 Rb1 18.Rb1 Bc7 19.Qd8 Bd8 20.Bg7 Rg8+–) 17.Ra8 Ke7 18.Rh8 h6 19.Be5 Be5 20.Qe5 Qe6 21.Qe6 (21.Qg7 Qg6 22.Qe5 Qe6 23.Qc5 Qd6 24.Re8 Ke8 25.Qd6 f6 26.Qc7 Kf8 27.Rd1 b6 28.Rd8) 21...Ke6 22.Rd1 g6 23.Rb8 Ke7 24.Rb7 Kf6 25.Rdd7 Ke6 26.Rf7 Kd6 (26...h5 27.b6 Kd5 28.Rbc7 Ke4 29.Rcd7 g5 30.Nd2 Ke5 31.Nf3 Ke6 32.Ng5 Ke5 33.f4) 27.Rbc7 Ke6 (27...Ke5 28.b6 g5 29.b7 Kd5 30.b8R Ke5 31.Rd8 h5 32.Rce7) 28.b6 Kd6 (28...Kd5 29.Rfe7 g5 30.Nc3 Kd6 31.e4 h5 32.e5) 29.b7 Ke6 (29...Ke5 30.b8Q Ke4 31.Rcd7 g5 32.Nc3) 30.Rce7 (30.b8Q g5 31.Qd8 Ke5 32.Rce7) 30...Kd6 (30...Kd5 31.b8Q Kc4 32.Rf4 Kc5 33.Nc3 Kc6 34.Rc4) 31.b8Q Kc6 (31...Kc5 32.Re5 Kc6 33.Qc7) 32.Rf6 (32.Re5 g5 33.Qc7) 32...Kd5 (32...Kc5 33.Nd2 h5 34.Re5) 33.Re5 (33.Qb5) 33...Kc4 34.Rc6 (34.Qb5) 34...Kd3 35.Qd6 (35.Qb5) 35...Ke2 36.Qd2 1–0. Wister,Finn Arild – Tandberg,Gjermund, Fagernes NOR, Clubs Ch, 2012.

5.Be2 Nf6 6.0–0 Nc6 7.a3 g6 (7...Be7 8.h3 Bf5 9.d4=) 8.d4 ed4 (8...e4 9.Nfd2 Be2 10.Qe2+=) 9.Nd4 Be2 10.Qe2 Bg7 11.Nc6 bc6 12.c4 0–0 13.Nd2 Re8 14.Nb3 White prepares the advance c5 14...Ne4 15.Bg7 Kg7 16.Rac1 White intends c5 16...Qf6 17.c5 d5 18.Nd4 White prepares b5 (18.Qd3 h6+/–) 18...Kg8 (18...a5 19.Qg4=) 19.Qc2 (19.Qf3 a5+/–) 19...a5+= 20.b5 (20.Ra1 h6+=) 20...cb5= 21.Nb5 Qe7 22.c6 Nd6 (22...Rab8 23.Rb1+=) 23.Nd6 (23.Nc3!?+/–) 23...Qd6+= 24.Qc5 Re6 25.Qb5 Qa3 (25...Re5 26.Rfd1+=) 26.Qb7+/– Qf8 27.Qc7 Qc8 (27...a4 28.Rfd1+/–) 28.Qd7+/– Qd8 (28...a4 29.Rc5+/–) 29.Rfd1 Rd6 30.Qb7 Qc8 31.Rd4 (better is 31.Rc5+/–) 31...Rb8+= 32.Qc8 Rc8 33.Kf1 Rdc6 34.Rc6 Rc6 35.Rd5 a4 36.Rd2 Rb6 37.Ra2 Rb4 38.Ke2 f5 39.Kd3 Kf7 40.f3 Rb3 41.Kc4 Re3 42.Kb4 Kf6 43.Ka4 Kg5 44.Kb4 Re1 45.Kc3 Rh1 46.g4? (better is 46.g3!?=) 46...fg4 47.Rg2 h5 48.fg4 hg4 49.Kd3 Kh4 50.Ke3 (50.Ke2 Ra1 51.Kd3 Ra3 52.Ke4 Kh3–+) 50...Rf1 (better is 50...Ra1–+) 51.Rf2?? (better is 51.Rg3–/+) 51...Rf2–+ 52.Kf2 Kh3 53.Kg1 g3 54.hg3 Kg3 55.Kh1 g5 56.Kg1 g4 57.Kh1 Kf2 0–1. Kanka,J (1650) – Dostal,K, Plzen op–C 9th, 2003.

5.Be2 Nf6 6.a3 h5 7.Nc3+= (7.0–0 Nc6 8.h3 (8.Nc3 Be7 9.h3 Bf5 10.d4 ed4 11.ed4 d5 12.Bd3 Bd3 13.Qd3) 8...Bf5 9.Nc3 Be7 10.d4 ed4 11.ed4 d5 12.Bd3 Bd3 13.Qd3; 7.h3 Bf5 8.0–0 (8.Nc3 Be7 9.d4 Nbd7 10.Nh4 Bh7 11.de5 Ne5 12.0–0 0–0 13.Nf3) 8...Nc6 9.Nc3 Be7 10.d4 ed4 11.ed4 d5 12.Bd3 Bd3 13.Qd3; 7.d4 e4 8.Ng5 d5 9.f3 ef3 10.gf3 Bd7 11.Nc3 Nc6 12.Qd2 Be7 13.0–0–0) 7...Nc6 (7...Be7 8.h3 (8.d4 ed4 9.ed4 0–0 10.0–0 d5 11.h3 Bf5 12.Bd3 Bd3 13.Qd3; 8.0–0 Nc6 9.h3 Bf5 10.d4 e4 11.Ng5 0–0 12.d5 Ne5 13.Qd4; 8.Ng5 Nc6 9.0–0 0–0 10.f3 Bf5 11.f4 Qd7 12.e4 Bg4 13.h3) 8...Bf5 9.d4 Nbd7 10.de5 de5 11.0–0 0–0 12.Ng5 Nb6 13.e4) 8.h3 (8.0–0 Be7 9.h3 Bf5 10.d4 e4 11.Ng5 0–0 12.f3 ef3 13.Rf3; 8.d4 e4 9.Ng5 Be2 10.Qe2 d5 11.0–0 Be7 12.f3 ef3 13.Rf3; 8.e4 Be7 9.h3 Bf3 10.Bf3 a5 11.0–0 0–0 12.Nd5 ab4 13.Nf6) 8...e4? (better is 8...Bf5+= 9.0–0 Be7 10.d4 e4 11.Ng5 d5 12.f3 ef3 13.Rf3) 9.hg4+– ef3 10.Bf3 h4 11.Nd5 Nd5 (11...Nd7 12.Be2+–) 12.Bd5 Qg5 (12...Qd7 13.Qf3+–) 13.Qf3 0–0–0 14.Qf7 Ne5 (14...Kb8 15.Qf5 Qf5 16.gf5+–) 15.Qe6 Kb8 (15...Nd7 16.f4 Qh6 17.Qf7+–) 16.f4 Qg4 17.fe5 Qg2 (17...Qe6 18.Be6 de5+–) 18.Bg2 1–0. Anonymous – bacoa, internet, 2011.

5.Be2 h5 6.0–0 h4 7.h3 Bh3? (better is 7...Be6+=) 8.gh3+– f6 9.Kh2 g5 10.Rg1 Nc6 11.Rg2 Qd7 12.Bf1 Nb4 13.a3 Nd5 14.Rg4 Nh6 15.Rg2 (15.Rg1 0–0–0+/–) 15...g4 (15...Ng8 16.d4 Nh6+–) 16.Ng1 g3 17.Kh1 gf2 18.Rf2 0–0–0 19.Bg2 Qe6 20.Nf3 Ng4? (20...Nb6 21.Nc3+/–) 21.Re2 (better is 21.hg4 Qg4 22.Qg1 h3+–) 21...Nge3? (better is 21...Nh6+/–) 22.de3+– (22.Re3?! Ne3 23.de3 d5+/–) 22...Bh6 23.e4 (better is 23.Ng5! Bg5 24.Qd5 (24.Bd5?! Qh3 25.Rh2 Qe3+/–) 24...Qd5 25.Bd5+–) 23...Nf4 24.Qf1 Ne2 25.Qe2 Bf4 26.Nbd2 Rhg8 27.Rg1 f5 28.ef5 Qf5 29.Nh4 Qc2 30.Bc1 d5 31.Bf3?? Rg1–+ 32.Kg1 Qc1 33.Nf1 e4 34.Bg4 Kb8 35.Ng6 Bd6 36.Nh4 Bg3 37.Ng2 Qa3 38.Nge3 Qa1 39.Kg2 Bh4 40.Be6 d4 41.Nf5 Bf6 42.Qe4 d3 43.Nd2 Qd1 44.Qe3 a5 45.Qf4 Qe2 (46.Qf2 Qe6–+) 0–1. valpa – mel, playchess.de, 2003.

5.h3 Bh5 6.Be2 Nf6 7.c4 b5 (better is 7...e4!? 8.Nd4 Be2 9.Ne2 Nbd7+=) 8.cb5+= Bf3 9.Bf3 ab5 1–0. GuestSMVF – GuestGXVY, freechess.org, 2017.

4.Nf3 h6

5.c4 Be7 6.Qc2 Bf6 7.d3 Bd7 8.Nc3 Ne7 9.a4 (9.Ne4 Ng6+=) 9...0–0 10.Be2 Be6 (10...Nec6 11.Qb3+=) 11.0–0 Nd7 12.d4 ed4 13.Nd4 Bd4 14.ed4 Bf5 15.Bd3 Bd3 16.Qd3 Ng6 (16...d5 17.c5=) 17.Rfe1+= Re8 18.Qg3 (18.Re8 Qe8 19.Nd5 Qd8+=) 18...Qg5 (18...Nb6 19.Re8 Qe8 20.Qd3=) 19.Nd5 (19.Qg5 hg5 20.Nd5 Nf6 21.Nf6 gf6+=) 19...Qg3= 20.hg3 Re1 21.Re1 Rc8 22.Ne7 (better is 22.a5+=) 22...Ne7–/+ 23.Re7 Nb6 24.c5 dc5 (24...Na4 25.Ba1–/+) 25.dc5+= Nd5 (25...Kf8 26.Re2 Na4 27.Bd4–/+) 26.Rd7 (better is 26.Re4!?=) 26...Nb4–/+ 27.Be5 f6 (27...b6!?–/+) 28.Bc7+= Nc6 (better is 28...Nd3! 29.Rd3 Rc7+=) 29.Bb6+= Ne5 (29...Rb8!?+=) 30.Rb7+/– Nc4 (30...Nd3 31.Ra7+/–) 31.a5+– 1–0. GuestGVHH – GuestTXDL, freechess.org, 2017.

5.Bc4 e4!? 6.Ng1 d5+=.

5.Bc4 Be6 6.Be6+= fe6 7.c4 Nf6 8.Qb3 (8.Qc2 Nc6+=) 8...Be7 (8...e4 9.Nd4 e5 10.Nf5=) 9.0–0 0–0 10.c5 Qd7 11.d4 e4 12.Nfd2 d5 (12...a5 13.b5=) 13.Nc3 c6 (13...Nc6 14.f3=) 14.a4 (14.f3 ef3 15.Nf3 Qd8+=) 14...Qe8 15.b5 (15.f3 ef3 16.Rf3 Qg6+=) 15...Nbd7= 16.h3 (16.f3 ef3 17.Nf3=) 16...e5 (16...Qg6!?=) 17.Nce4+= Ne4 18.Ne4 Kh8 19.Ng3 e4 20.Bc3 Qg6 21.bc6 Qc6 22.Rab1 Rab8 23.Ba5 Bd8 (23...b5 24.cb6 Bd8 25.Rfc1+/–) 24.Bd8 Rfd8 25.a5 g6 (25...Rf8 26.Nh5+–) 26.Ne2 Nf6 27.Nc3 (27.Qa2 Qc7+–) 27...Kg7 28.Qa4 (28.Qa2 Qc8+–) 28...Qc7 (28...Qa4 29.Na4 Rd7 30.Rb2+–) 29.Rb2 Qf7 30.Rfb1 Rd7 31.Rb6 Rf8 (31...Rc8 32.Qb3 Rcc7 33.Ne2+–) 32.Nd1 (32.Qb3 Ne8 33.Rb2 Qf5+–) 32...h5 (better is 32...Rc8+–) 33.Qb3 Kh6 (33...Ne8 34.Rb7 Rb7 35.Qb7+–) 34.Rb7 Rb7 (34...Rc8 35.Rb6+–) 35.Qb7 Qe8 36.c6 Qc8 (36...Qe6 37.Rb6+–) 37.Qc8 (better is 37.Rb6!? Kg5+–) 37...Rc8 38.Rb6 Ng8 39.Ra6 Ne7 40.Nc3 Nc6 (40...h4 41.f3 ef3 42.gf3+–) 41.Nd5 Nd8 (41...Kg7 42.h4+–) 42.g3 (42.Rg6 Kg6 43.Ne7 Kf7 44.Nc8 Ne6+–) 42...Nf7 (42...Rc1 43.Kg2 Kg7 44.Rb6+–) 43.Nf6 Rc1 (43...Ng5 44.Kg2+–) 44.Kg2 Ra1 (44...Nd8 45.Ne4 Nc6 46.Nc5+–) 45.Ne4 Nd8 46.Ra8 Nc6 47.a6 Nb4 (47...Kg7 48.d5 Ne5 49.d6+–) 48.Nc5 (48.a7 Kg7 49.Rb8 Ra7 50.Rb4 Re7+–) 48...Ra2 (48...Kg7 49.Kf3+–) 49.h4 (49.a7 Kg7 50.Rb8 Ra7 51.Rb4 g5+–) 49...Ra3 (49...Kg7 50.Kf3+–) 50.Ne6 (better is 50.a7 Kg7 51.Rb8 Ra7 52.Rb4 Kf7+–) 50...Kh7 51.Ra7 Kh8 (51...Kg8 52.Nc5+–) 52.Nc5 Ra2 53.Rb7 (better is 53.Kf3 Kg8+–) 53...Na6 54.Ra7 (54.Nd3 Kg8+–) 54...Nc5 (54...Nb4 55.Ra2 Na2 56.e4+–) 55.Ra2 (55.Ra2 Nd3 56.Ra7+–) 1–0. Kreuzer,Uwe – Voelker, Mannheim, 1980.

5.Bc4 Nf6 6.a3 Nc6 7.0–0 d5 (7...Be7 8.Nc3 e4 9.Nd4 Nd4 10.ed4 d5 11.Bb3 0–0) 8.Bb3 (8.b5 Na5 (8...ab5 9.Bb5 Bd6 10.Ne5 0–0 11.f4) 9.Be2 e4 10.Ne5 (10.Nd4 ab5 11.d3) 10...ab5 11.d3 Bd6) 8...e4 (8...Bd6 9.Nc3 Be6 10.Na4 b6 11.d4 ed4) 9.Nd4 (9.Ne5 Ne5 10.Be5 Bd6 11.Bd4 Bg4) 9...Be7 (9...Bg4 10.Qe1 a5 (10...Bd6 11.h3) 11.h3 Bd7) 10.d3 (10.Nc6 bc6 11.d3 0–0= (11...Bg4+=)) 10...0–0 (10...Nd4 11.Bd4 0–0= (11...Bg4 12.Qd2=); 10...Bg4 11.Nc6 bc6) 11.Nc6+= (11.Nd2 Nd4; 11.de4=) 11...bc6 12.de4 de4 13.Qd8 Rd8 14.Be5 Bd6 15.Bd6 (15.Bd4!?+=) 15...cd6= 16.Nc3 d5 17.Ne2 Bb7 18.Rfd1 a5 19.Nd4 ab4 20.ab4 Rac8 (20...Nd7 21.Ra5=) 21.Ra7+= Ba8 22.c4 (22.Rda1 Rb8+/–) 22...c5+= 23.Nf5 Kh8 (23...Kh7 24.Ne7 (24.Rf7 Kg6 25.bc5 Kf7 26.Nd6 Rd6 27.cd6 Ke6–+) 24...Rb8 25.b5+=) 24.Ne7 (worse is 24.Rf7 dc4 25.Rd8 Rd8 26.Bc4 Bd5 27.Bd5 Rd5=) 24...Rb8 25.b5 dc4 26.Rd8 Rd8 27.Bc4 Rd1 28.Bf1 Bd5 29.Nd5 Nd5 30.Rd7 (30.Rf7?! Nc3 31.f3 Nb5+=) 30...c4 (30...Kh7 31.b6 (31.Rf7?! Nc3 32.f3 Nb5=) 31...Rf1 32.Kf1 Nb6 33.Rf7+–) 31.b6 (31.Rf7?! Kg8 32.Rd7 c3 33.Rd8 Kf7+=) 31...Rf1 32.Kf1 Nb6 33.Rf7 c3 34.Rc7 Na4 (34...Nd5 35.Rc5 Nf6 36.Rc3+–) 35.Rc4 Nb2 (35...Nb6 36.Rc3 Nd5 37.Rc4+–) 36.Rc3 Nd3 37.Rc4 1–0. mrkt – baliuc, internet, 2011.

5.Be2 Nc6 6.b5 ab5 7.Bb5 Bd7 8.c4 Nf6 (8...e4 9.Bc6 bc6 10.Nd4+=) 9.Nc3 Be7 10.Nd5 (better is 10.0–0=) 10...Nb4?? (better is 10...Nd5!? 11.cd5 Nb4+=) 11.Nb4?? (11.Bd7 Qd7 12.Nb4 e4+–) 11...Bb5? (better is 11...c6 12.a4 cb5 13.ab5 Ra1 14.Qa1 0–0+=) 12.cb5+– d5 (12...Qd7 13.Qe2+–) 13.Qb3 Bb4 14.Qb4 Nd7 (14...Qd6 15.Qd6 cd6 16.Nh4+–) 15.Ne5 Ne5 16.Be5 Qg5 17.Bg3 Qf6 18.0–0 c5 (18...Rc8 19.Rfc1+–) 19.Qc5 Rd8 20.d4 (better is 20.Bc7 Rc8 21.Rfc1+–) 20...Rd6 (20...Qe7+–) 21.Bd6 Qd6 22.Qd6 f6 (22...f5 23.Qe6 Kf8 24.Rfc1 g5 25.Rc7 h5 26.Qc8) 23.Rac1 (23.Qe6 Kf8 24.Rfc1 g5 25.Rc7 f5 26.Qc8) 23...Kf7 24.Qd5 (24.Rc7 Kg6 25.Qg3 Kf5 26.Qh3 Ke4 27.Qf3 Kd3 28.Rd1) 24...Kg6 25.Qe4 f5 26.Qe6 Kh7 (26...Kh5 27.Qf5 g5 28.g4 Kh4 29.Qf3 Re8 30.Qg3) 27.Qf5 1–0. GuestPYCL – kalitt, freechess.org, 2017.

3.e3 b5

4.a4 ba4= 5.c4 (5.d4 Bd7=) 5...Na6 (5...Bd7!?=) 6.Qa4+= Bd7?? (better is 6...Qd7+=) 7.Qa6+– 0–1. GuestWCQW – GuestZSTD, freechess.org, 2016.

4.Bb5 Bd7 5.Bc4 c6+/–.

4.Bb5 Bd7 5.Be2 d5 6.Be5 Nc6 7.Bb2 (better is 7.Bc3 Nb4 8.a3+/–) 7...Bb4?? (7...Nb4 8.a3 Nc6 9.Nc3+/–) 8.Nf3 (better is 8.Bg7 Qg5 9.Bh8 Qg2 10.Bf3+–) 8...Nf6+/– 9.c4 (9.a3 Bc5+/–) 9...dc4 (9...0–0 10.Qc2+/–) 10.Bc4 0–0 (10...Bd6 11.Nc3+/–) 11.0–0 (11.Qc2 Bd6+/–) 11...Ng4 (11...Rb8 12.Qc2+/–) 12.h3 (better is 12.Qc2 Bd6 13.Bd5+/–) 12...Nge5?? (better is 12...Nf6+/–) 13.Ne5+– Ne5 14.Be5 Bh3 (14...Bd6 15.Bd6 cd6+–) 15.gh3 Qg5 16.Bg3 Bd6 17.Qf3 Qf6 (17...Rab8 18.Nc3+–) 18.Qf6 gf6 19.Nc3 Bg3 (19...Rab8 20.Rab1+–) 20.fg3 Kh8 (20...Kg7 21.Nd5+–) 21.Rf6 Rg8 (21...Rad8 22.d4+–) 22.Kh2 Rad8 23.d4 (better is 23.d3 Rge8+–) 23...Rd6 (23...c5 24.dc5 Rd2 25.Ne2+–) 24.Raf1 (better is 24.Rf7!? Re8 25.Raf1 Rg6+–) 24...Rf6 25.Rf6 Rg7 (25...Re8 26.Rf7 c6 27.e4+–) 26.Nb5 Rg5 27.Rf7 c6 28.Na7 c5 29.Rf8 Kg7 30.Rg8 Kh6 31.Rg5 Kg5 32.dc5 Kf5 33.c6 Kf6 34.c7 Kg5 (34...h6 35.c8Q Kg7 36.Qd7 Kf6 37.Qe6 Kg5 38.h4 Kh5 39.Qf5) 35.c8Q 1–0. GuestJKKR – GuestTJBC, freechess.org, 2017.

4.Bb5 Bd7 5.Be2 Nf6 6.b5 (6.Na3 a6+/–) 6...Be7 (6...a6 7.ba6 Na6 8.Nf3+=) 7.c4 c6 8.a4 cb5 (8...0–0 9.d4+/–) 9.ab5 Qb6 (9...a6 10.Nf3+/–) 10.Nc3 0–0? (better is 10...Bf5+/–) 11.Bf3+– e4 12.Ne4 Ne4 (12...d5 13.Nf6 Bf6 14.Bf6 Qf6 15.Bd5+–) 13.Be4 Nc6 14.Ra6 Qc5 (14...Qd8 15.Bc6 Bc6 16.Rc6+–) 15.bc6 (15.Bc6 Bc6 16.Qg4 f6 17.Rc6 Qb4 18.Qe6 Rf7+–) 15...Bc8 (15...Be6 16.d3 f5 17.Bf3+–) 16.Qa4 (better is 16.Ra4 a6+–) 16...Ba6 17.Qa6 Rfc8 (17...Rfe8 18.Bd4 Qb4 19.Qb5 (worse is 19.Ba7 Bd8+–) 19...Qb5 20.cb5+–) 18.Bd4 Qg5 19.Nf3 (19.c7!? Qg4 20.Ba8 Ra8+–) 19...Qg4 20.d3 g6 (20...Rc7 21.0–0+–) 21.0–0 (21.h3!? Qe6 22.Bd5 Qf5+–) 21...Rc7 22.Rb1 Qc8 (22...Bd8 23.Rb7+–) 23.Qa1 (23.Qc8 Rac8 (23...Rcc8?? 24.c7+–) 24.Rb7 h6+–) 23...h5 (23...h6 24.Rb7+–) 24.h3 (24.Rb7 a5+–) 24...Kh7 (24...Bd8 25.Bh8 f6 26.Bf6 Bf6 27.Qf6+–) 25.Bf6 (25.Rb7!? Kg8+–) 25...Qe6 (25...Bf6 26.Qf6 Qd8 27.Ng5 Kg8 28.Qd8 Rd8+–) 26.Ng5 (26.Ng5 Kg8 27.Ne6 fe6 28.Rb7+–) 1–0. Baumgarten,Horst – Kalder,Walter, Bahn–chG Borkum, 1996.

4.c4 a6 5.cb5+= Bd7 (5...ab5 6.Bb5 c6 7.Be2+=) 6.ba6+/– Na6 7.a3 Nf6 8.Nf3 (8.Bc4 Be7+/–) 8...h6 (8...e4 9.Ng1+=) 9.Be2 (9.Qc2 Be7+/–) 9...Be7 (9...e4 10.Ng1+/–) 10.0–0 0–0 11.Nc3 c6 12.Qc2 Qc8 13.Rfc1 Nc7 14.d4 Ng4 (14...ed4 15.Nd4 (15.ed4?! Re8+/–) 15...Qb7 16.Nd1+–) 15.de5 de5 (15...Ne5 16.Ne5 de5 17.Na4+–) 16.Ne4 (16.h3 Nf6+–) 16...Bf5?! (16...f5 17.Nc5 Bc5 18.Qc5+– (worse is 18.bc5 e4 19.Nd2 Nf6+–)) 17.Bd3 (17.Qc6 Be4 18.Qe4 Bd6+–) 17...Rd8 18.Ne5 (better is 18.Nd6! Bd3 19.Nc8 Rac8 20.Qc6 e4+–) 18...Ne5 19.Be5 Bd7 (19...Ne6 20.Bc3+–) 20.Bd6 Re8 21.Be7 Re7 22.Qc5 (22.Nc5 Ne6+–) 22...Re6 23.Nd6 Qd8 24.Nf7! Qe8?? (24...Kf7 25.Bc4 Combination) 25.Nh6! Rh6 (25...Rh6 26.Bc4 Pinning; 25...gh6 26.Bc4 Combination) 26.b5 (better is 26.a4+/–) 26...Ra5?? (better is 26...Ne6 27.Qe5 cb5=) 27.a4?? (better is 27.Qb6!? Ra4 28.Qc7 cb5+–) 27...Qb8 28.Qe7+– Nd5 29.Qd7 Qh2 30.Kf1 Qh1 31.Ke2 Qg2 32.Qe8 1–0. Fournier,Frederic – Roy,Claude, Ch Club, 1999.

4.c4 bc4!? 5.Bc4 Nf6 =.

4.c4 c6 5.cb5+/– cb5? (5...Nf6 6.d4+/–) 6.Bb5?? (better is 6.Qf3 d5 7.Bb5 Bd7 8.Qd5 Bb5 9.Qe5 (9.Qa8 Bc6 10.Qa7 Bg2+=; 9.Qb5?! Nd7+–) 9...Ne7 10.Qb5 Nbc6 11.a3+–) 6...Bd7+/– 7.Bd7 Qd7 (7...Nd7 8.Nc3+/–) 8.Nf3 Nf6 9.0–0 Nc6 (9...Be7 10.Nc3+/–) 10.a3 (better is 10.b5 Nb4 11.Qb3+/–) 10...d5? (better is 10...Be7+/–) 11.Ne5 Ne5 12.Be5 Be7 13.Qb3 (13.Nc3 0–0+–) 13...0–0 14.d3 (14.Nc3 Rfd8+–) 14...Ng4 15.Bb2 (15.Bf4 d4 16.e4 Bd6+–) 15...Bf6 (15...Qd6 16.g3+–) 16.d4 (16.h3 Bb2 17.Qb2 Nf6+–) 16...Qd6 17.Nc3?? (better is 17.g3+–) 17...Qh2 0–1. Goldmund,Heike – Jerez,Miriam, FICGS, 2016.

4.Bb5 c6

5.Be2 Ba6 6.Nf3 Nf6 7.a3 Be7 8.0–0 0–0 9.c4 Nbd7 10.d3 d5? (better is 10...Bb7!?+/–) 11.Ne5+– Ne5 12.Be5 dc4 13.dc4 Ne4 14.Qc2 Ng5 (14...f5 15.Nc3 Qd2 16.Qd1+–) 15.Nc3 Bb7 16.Rfd1 Qe8 17.Rab1 Rd8 (17...a5 18.Bd3 ab4 19.ab4+–) 18.Bd3 h6 19.c5 Ba8 (19...Bc8 20.f4+–) 20.Ne4 Bc5 (20...Ne4 21.Be4 Rd1 22.Rd1+–) 21.Ng5 (21.Nc5?! Qe5 22.Bf5 Qe7+–; 21.bc5?! Ne4 22.Bf4 f5+–) 21...hg5 22.Bh7 (worse is 22.Qc5 Rd5 23.Qa7 Re5+–; 22.bc5?! Qe5 23.Rb4 Rd5+–) 22...Kh8 23.Rd8 (worse is 23.Qc5 Kh7 24.Bd6 Rh8+–; 23.bc5?! Qe5 24.Bf5 Rd1 25.Rd1 Bb7+–) 23...Qd8 (23...Qe5 24.Rbd1 Qf6+–) 24.bc5 f6 (24...Qd5 25.Bd6 Rd8 26.Bd3+–) 25.Bd6 Rf7 (25...g4+–) 26.Bg6 Rb7 27.Rb7 Bb7 28.Qd1 Qa5 (28...Qa8 29.Qh5 Kg8 30.Qh7) 29.Qh5 (29.Qh5 Kg8 30.Qh7) 1–0. Fournier,Frederic (1990) – NN, Active, 2004.

5.Be2 Nf6 6.a3 a5+/–.

5.Be2 Nf6 6.a4 Be7 7.c4 0–0 8.Nf3 (8.b5 Bb7 9.Nf3 a6+/–) 8...e4 9.Nd4 Ne8 (9...d5!?+=) 10.Nc3 f5 (10...Nf6 11.0–0+/–) 11.0–0 (better is 11.d3+/–) 11...Nd7?? (better is 11...Bf6+/–) 12.Ne6 (better is 12.Nc6 Qb6 13.Nd5+–) 12...Qb6 13.Nf8 Nf8 14.b5 Bb7 (14...Nf6 15.d4+–) 15.a5 Qc5 (15...Qc7+–) 16.a6 (16.Na4 Qe5 17.Be5 de5+–) 16...Bc8 (16...Qb6 17.Qb3 Qc7 18.ab7 Qb7 19.c5 d5+–) 17.Na4 Qb4 (17...Qe5 18.Be5 de5 19.bc6+–) 18.Bc3 Qa4 (18...Qc3 19.Nc3 cb5 20.cb5+–) 19.Qa4 cb5 (19...cb5 20.Qb5 Nc7+–). GuestZJVS – GuestSTDC, freechess.org, 2016.

5.Be2 Nf6 6.c4 a6 (6...Be7 7.d4+/–) 7.Nf3 (7.d4 e4+/–) 7...c5 (7...e4 8.Nd4+/–) 8.bc5 dc5 (better is 8...e4!? 9.cd6 Bd6+–) 9.Ne5+– Bd6 10.Bf3 (10.Qa4 Bd7 11.Nd7 Qd7+–) 10...Ra7 11.Bc6 (better is 11.d4+–) 11...Nc6? (better is 11...Nbd7+–) 12.Nc6 Qb6 (12...Bg4 13.Qc2 Qa8 14.Na7 Qg2 15.Rf1+–) 13.Na7 Qb2 (13...Qa7 14.Bf6 gf6 15.Nc3+–) 14.Nc8 Qa1 (14...Bc7 15.Nc3 Qb7+–) 15.Nc3 (15.Nd6 Kd7 16.Nf7 Rf8+–) 15...Qb2?? (better is 15...Qd1 16.Kd1 Bc7+–) 16.Nd6+– Kd7 (16...Ke7 17.Nf5 Kf8 18.Qf3 Qa1 19.Nd1+–) 17.Nf7 Ra8 (17...Re8 18.f4+–) 18.0–0 Qb7 (18...Ke7 19.Qf3 Kf7 20.Qa8 Qd2 21.Na4 Qa2 22.Qa6+–) 19.d4 (19.Ne5 Ke8+–) 19...cd4 (19...Ke7 20.Ne5+–) 20.Qd4 Ke7 21.Ng5 h6 (21...Ke8 22.Ne6+–) 22.Qe5 (22.Nd5!? Kf8 23.Ne6 Kf7 24.Ng7 Nd5 25.cd5 Rg8+–) 22...Kf8 23.Qd6 (23.Qd6 Qe7 24.Ne6 Kf7 25.Qe7 Ke7 26.Ng7+–) 1–0. Dopper,Johan – Jonge, year?

3.e3 b6

4.b5 Bb7 5.c4 (--> 1.b4 e5 2.Bb2 d6 3.b5 b6 4.c4 Bb7 5.e3).

4.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 b6 4.e3).

4.Bc4 Bb7 5.f3?? (5.Nf3 e4 (5...d5 6.Bf1 e4 7.Ne5 Nf6 8.c4 Bd6 9.Qa4=) 6.Nd4 d5= 7.Bf1 Nf6 8.b5 a6 9.a4=) 5...g6 (5...Qh4!? 6.g3 Qc4 7.a3–+) 6.Ne2?? (6.e4 f5=) 6...Bg7?? (better is 6...Qh4 7.Ng3 Qc4–+) 7.0–0 Ne7 8.Nbc3 (8.f4 0–0+=) 8...0–0 9.e4 Nd7 (9...d5 10.ed5 Nd5 11.a3=) 10.Qe1 (10.a4 c5 11.b5 Nf6=) 10...a6 11.Rd1 b5 12.Bb3 c6 (12...c5 13.bc5 Nc5 14.d4 Nb3 15.cb3=) 13.d3 Kh8 14.f4 f5 15.Qg3 (15.d4 Qb6 16.Kh1 ef4 17.Nf4 fe4 18.Ne4 Nd5 19.Bd5 cd5+/–) 15...d5 (15...a5 16.a3=) 16.ed5 cd5 17.Rde1 (17.fe5 Be5 18.Nf4 Qb6 19.d4 a5 20.ba5 Ra5+=) 17...d4 (17...Qb6!? 18.Kh1 e4=) 18.Nb1 Ng8? (18...Nc6!?+=) 19.Nd2 (19.fe5 Ne5 20.Nf4 Nc6+–) 19...Nh6 (19...Bf6 20.Qf2+/–) 20.Nf3 (20.fe5!? Ne5 21.Bd4+–) 20...Ng4 (20...Bf3 21.Qf3 Ng4 22.fe5 Be5 23.Bd4 Bd4 24.Nd4 Nh2 25.Qf2 Nf1 26.Ne6=) 21.fe5+/– Bf3 22.Qf3 (22.Rf3 Nde5 23.Rff1 Nc6+=) 22...Nde5+= 23.Qf4 (23.Qg3 Nc6 24.Nf4 Re8+=) 23...Bh6 24.Qg3 (24.Qd4 Qh4 25.h3+–) 24...Be3+= 25.Kh1 g5 26.h3?? (26.Nd4 Bd4 27.Re5 Bb2 28.Ref5 Rf5 29.Rf5–/+) 26...f4–+ (26...f4 27.Qg4 Ng4 28.hg4 Qd6–+) 0–1. Vahl,Laurens – Thissen,Timon, Hengelo U14 op, 1998.

4.Bc4 c6= A) 5.Be2 Qg5 (5...Nf6 6.a3 Be7 7.Nf3 0–0 8.0–0 Bf5 9.c4=; 5...Be7 6.Nf3 Nf6 7.0–0 0–0 8.Nc3 e4 9.Nd4=) 6.Bf1 Qg6 7.a3 Bf5 8.d3 Be7 9.Ne2+=; B) 5.b5 Nf6 (5...d5 6.Bb3 e4 7.Ne2 Qg5 8.Ng3 Bg4 9.f3+=; 5...Be7 6.bc6 Nf6 7.Qf3 Qc7 8.Nc3 Bg4 9.Nd5=) 6.d4 ed4 7.Bd4 d5 8.Bd3 a6 9.bc6=.

4.Bc4 d5 5.Bb3 e4 6.Ne2 c6 7.b5 Qg5 8.Ng3 Bg4 9.f3+=.

4.d3 c5 5.b5 (5.Qf3 d5+=) 5...Nf6 (5...a6 6.ba6 Nf6 7.Nf3=) 6.c4 (6.Qf3 d5 7.Be5 Be7+=) 6...Be7 (6...a6 7.ba6 Be7 8.d4=) 7.Nc3 (7.Qf3!? d5 8.cd5+=) 7...Be6 (7...Bb7 8.Nf3=) 8.e4 (8.Be2 a6=) 8...0–0 9.g3 h6 (9...a6 10.Bh3+=) 10.Bg2 Nh7 (10...Bg4 11.f3 Be6 12.f4=) 11.Nge2= f5?? (better is 11...a6=) 12.ef5+– Bf5 13.Ba8 Nd7 14.Be4 Be4 (14...Bg4 15.Bd5 Kh8 16.h3+–) 15.Ne4 (15.de4 Ng5+–) 15...Ng5 (15...Nhf6 16.f4+–) 16.Ng5 (16.f4 Nh3+–) 16...Bg5 17.0–0 Rf3 (17...Qe8 18.Qa4+–) 18.Nc3 (18.h4 Be7+–) 18...Qf6 (18...Qf8 19.Ne4 Be7 20.Kg2+–) 19.Ne4 (19.Ne4 Qf7 20.Kg2+–) 1–0. Fredek (2090) – Mucky smartin, Freundschaftspartie, 5m + 0s, 2005.

4.d3 Nf6 5.Nf3 =.

4.d4 Nc6 5.b5+/– Nb4 6.a3 Nd5 7.de5 Bb7 8.ed6 Qd6 9.Nf3 0–0–0 10.c4 Nde7 (10...Ndf6 11.Nc3+/–) 11.Qd6 Rd6 12.Be2 f6 (better is 12...Ng6!?+/–) 13.Nc3+– Nh6 14.Nd4 (14.0–0!?+–) 14...Bg2+/– 15.Bf3?? (better is 15.Rg1 Bb7 16.0–0–0+/–) 15...Bh1–/+ 16.Bh1 Nhf5 17.Nc6 Nc6 18.Bc6 Be7 19.Ne4 Rdd8 20.a4 (20.Bd5!? Kb8 21.0–0–0–/+) 20...Bb4–+ 21.Ke2 (21.Bc3 Bc3 22.Nc3–+) 21...Ne7 22.Rg1 Nc6 23.Rg7?? (better is 23.bc6 Rhe8 24.Nc3 Bc3 25.Bc3–+) 23...Ne5 24.f4 Nc4 25.Bf6 Rde8 26.Kd3 Nd6 (26...Nd6 27.Be5 Rhg8 28.Rh7 Ne4 29.Ke4 Bd6–+) 0–1. croach (2385) – vitorcosta, net–chess.com, 2015.

4.d4 ed4 5.Bd4 a6 6.Bc3 Nf6 7.Nf3 d5 8.Bd3 Bd6 9.0–0=.

4.d4 d5= 5.a3 (5.b5 ed4 6.Bd4 a6 7.Nc3 ab5 8.Bb5 c6 9.Be2=) 5...e4 (5...ed4 6.Qd4 Nf6 7.Nf3 a5 8.b5 Be7 9.Be2+=) 6.c4 c6 7.cd5 cd5 8.Nc3 Nf6 9.Qa4=.

4.d4 Nf6!? =.

4.Be2 Bb7 5.Nf3 (--> 1.b4 b6 2.Bb2 Bb7 3.e3 d6 4.Nf3 e5 5.Be2).

4.Nf3 Bb7 (--> 1.b4 b6 2.Bb2 Bb7 3.e3 d6 4.Nf3 e5).

4.Nf3 c5 5.b5 (better is 5.Ne5!? de5 6.Qf3+/–) 5...a6 6.a4 (6.Nc3 Nf6=) 6...ab5 (6...e4 7.Ng1=) 7.ab5 (7.Bb5 Bd7=) 7...Ra1= 8.Ba1 Bg4 (8...Nf6 9.Bd3=) 9.Be2 f6 (9...e4 10.Ng1 Be6 11.d3 ed3 12.Qd3+=) 10.c4 (10.e4 Ne7+=) 10...Bf5 (10...d5!?=) 11.d3 (11.Nc3 e4 12.Ng1 Ne7+/–) 11...Nh6 12.Nh4 (better is 12.Nc3+=) 12...Qd7? (better is 12...Be6!?+=) 13.Bh5 (13.Nf5 Nf5 14.Bg4 Qa7+–) 13...g6+/– 14.Nf5 Qf5 (14...Nf5 15.Bf3+/–) 15.Bf3+– Be7 16.Be4 (16.Nc3 0–0+–) 16...Qg5 17.Bd5 Nf7 (17...Nf5 18.Nd2+–) 18.0–0+– 0–0 19.Nd2 Nd7 20.Nf3 Qh6 21.Qa4 Kg7?? (better is 21...Rd8+–) 22.Qa7 Rd8 23.Be6 (better is 23.Bc6 d5 24.Bd7 dc4+–) 23...e4 (23...Nf8 24.Qe7 Ne6 25.Qe6 Ra8+–) 24.de4 (24.Bd7?! ef3 25.Be6 Re8+–) 24...Nfe5 25.Ne5 fe5 (25...de5 26.Bd7 Kf8 27.Bc6+–) 26.Bd7 Qh4 27.Bc6 Kh6 28.f4 ef4 (28...Bf6+–) 29.ef4 Rf8 (29...Bf8 30.Qf7 Qe7 31.Bg7 Kh5 32.Qd5 g5 33.g4 Kg6 34.Bc3 h5 35.Qf5 Kh6 36.Bd5 Re8 37.Bf7 Qf6 38.Qf6 Kh7 39.Qg6) 30.Bb2 (better is 30.g3 Qf6 31.Bf6 Bf6 32.g4 Bd4 33.Kg2 Rf4 34.Rf4 Bf6 35.Rf6 Kg5 36.Qe7 Kg4 37.h3 Kh5 38.Rf4 d5 39.Qh4) 30...Rf4 (30...Bf6 31.Bc1+–) 31.Rf4 (better is 31.Bc1 Bg5 32.Rf4 Bf4+–) 31...Qf4 32.Qe7 Qe3 33.Kf1 Qf4 (33...Qd3 34.Kf2 Qd2 35.Kf3 Qd3 36.Kg4 Qe2 37.Kh3 Qb2 38.Qd6 Qf2+–) 34.Ke2 Qg4 35.Ke3 Qg2 (35...Qg5 36.Qg5 Kg5 37.Bg7+–) 36.Qg7 (36.Qh4) 36...Kg5 37.Bf6 Kg4 (37...Kh5 38.Qh7 Kg4 39.Qh4) 38.Bd7 Kh5 39.Qh7 1–0. GuestZPNQ – kaszanka, freechess.org, 2017.

4.Bc4 Nf6

5.a3 d5 6.Be2 Bd6 7.Nf3 e4 8.Ne5 0–0 9.0–0+=.

5.Nf3 Bb7 6.d3 Nbd7 7.Nbd2 c6 8.0–0 Be7 9.Bb3 a5 10.ba5 Ra5 11.Nc4 Ra8 12.Qd2 d5 13.Nce5+/– 0–0 14.Qc3 Re8? 15.Nc6+– Bc6 16.Qc6 Rc8 17.Qa4 Nc5 18.Qd4 Ne6 19.Qe5 Bd6 20.Qf5 g6?? 21.Qf6 Qf6 22.Bf6 Ra8 23.Bd5 Nc7 24.Ba8 Ra8 25.Rfb1 Nd5 26.e4 Nf6 27.Rb6 Rd8 28.e5 Nd5 29.Rd6 Rd6 30.ed6 f6 31.c4 Nc3 32.Re1 Na2 33.d7 Nb4 34.d8Q Kg7 35.Re7 Kh6 36.Qd4 Nc2 37.Qh4# 1–0. TriAngel – junodogs, ICC, 1999.

4.Qf3 c6

5.b5 Ne7 6.d4 =.

5.Qd1 Bb7 6.Nf3 Be7 7.Be2 Nf6 8.a3 0–0 9.0–0 e4 10.Nd4 d5 11.d3 Bd6 12.Nf5 Bc8 13.Nd6 Qd6 14.f3 (better is 14.de4 Ne4 15.c4+=) 14...Bf5?? (better is 14...ed3 15.Bd3 Re8=) 15.fe4+– de4 (15...Be4 16.Bf6 Bg2 17.Kg2 gf6 18.Nd2+–) 16.Rf5 Qe6 17.Qf1 (better is 17.Re5!? Qd7+–) 17...ed3 18.cd3 (18.Bf6? de2 19.Qe2 Qf5–+; 18.Bd3?! Qe3 19.Qf2 Qf2 20.Kf2 Nbd7+–) 18...Nbd7 (18...Qe3 19.Qf2 Qf2 20.Kf2+–) 19.e4 c5 20.Qf2 Rac8 21.Nc3 cb4 22.ab4 Qb3 23.Na4 (better is 23.Bd1!? Qb4 24.Nd5 Nd5 25.Rd5 Nf6+–) 23...Rc2 24.Bf6 (24.Bd1!? Rf2 25.Bb3 Rf5 26.ef5 a5+–) 24...Nf6 25.Rf6 (25.Qe1 Rfc8+–) 25...b5? (25...Qb4 26.Kf1 Rfc8 27.Rf7 Rc1 28.Bd1 Ra1 29.Rg7 Kg7 30.Qg3 Kf7 31.Qf4 Kg7 32.Qe5 Kg6 33.Qa1 Qd2=) 26.Nc5 Qc3 (26...Qb4 27.Rfa6 Rc5 28.Ra7 Rc2+–) 27.Nd7 (better is 27.Rfa6 Qd2 28.Nd7+–) 27...Qa1–+ (27...Qa1 28.Qf1 Rc1–+) 0–1. GuestFWLS – GuestJPTP, freechess.org, 2017.

5.b5 Bb7

6.d4 ed4 7.Bd4 a6 =.

6.Ne2 Nf6 (6...Qd7 7.bc6 Bc6 8.e4=) 7.d3 (7.d4!?=) 7...Qc7 (7...Qe7 8.bc6 Nc6 9.e4+=) 8.bc6 (8.Nec3 a6+=) 8...Nc6 (8...Qc6 9.Qc6 Nc6 10.d4+=) 9.e4–/+ Nb4 10.Na3 Nc2 11.Nc2 Qc2 12.Bc3 Ba6 (12...d5 13.Qf5 Nd7 14.d4–/+) 13.Qh3 (13.Rc1 Qd3 (13...Qa2? 14.Ra1 Qe6 15.Ra6+–) 14.Qf6 gf6–/+) 13...Qd3 (13...Bd3 14.Rc1 Qa4 15.Qd3 Ne4 16.Qd5+/–) 14.f3 Qe3 15.Bd2 Qa3 16.Kf2? (16.Nc3 Bf1 17.Rf1 Be7–/+) 16...Be7 (16...d5 17.Nc3 Bc5 18.Kg3 Bf1 19.Raf1–+) 17.g4 (17.Qg3 0–0–+) 17...Be2 (better is 17...d5–+) 18.Be2? (18.Ke2 d5–+) 18...Ne4! 19.Kg2 (19.fe4 A pinning theme 19...Qh3) 19...Nd2 20.Bb5 Kd8 (20...Kf8!? 21.Rhd1 Qb2 22.Kg1–+) 21.g5 The mate threat is Qd7 21...Qf3 (21...Bg5 22.Qd7 A classical mating theme) 22.Qf3 Nf3 23.Kf3 a6 (23...Bg5 24.Rad1 Ke7 25.Rhg1–+) 24.Bc4 (24.Bc6 Rc8 25.Bb7 Rc7 26.Ba6 Bg5–+) 24...Bg5 25.Rhg1 (25.Rhb1 Rc8 26.Ba6 Rc3 27.Kg4 Be3–+) 25...h6 (25...f6 26.Rad1 Ke7 27.Ke2–+) 26.h4 (26.Rab1 Re8–+) 26...Bf6 (26...Bh4 27.Rg7 f5 28.Rag1 e4 29.Ke3 Bg5 30.Ke2–+) 27.Bf7 e4 (27...Rf8 28.Bd5 Bh4 29.Ke2 Rf2 30.Ke3–+) 28.Ke4 Ba1 29.Ra1 Rf8 30.Bd5 Rc8 31.h5 (31.Rg1 Re8 32.Kd4 Re7–+) 31...Rc5 (31...Re8 32.Kd4–+) 32.Rg1 Re8 33.Kd4 Re5 34.Bf7 Rf5 (34...Rg5!? 35.Rg5 Rg5 36.a3–+) 35.Rg7 Rf4 (35...Rc7 36.Rg8 Ke7 37.Bg6 Rf4 38.Be4–+) 36.Ke3 Rf6 37.Bg6 (37.Kd4 Rc7 38.Rg8 Ke7–+) 37...Re5 38.Kd4 Rf4 39.Kd3 Rg5 (39...Re7 40.Re7 Ke7 41.Be4–+) 40.Rb7 (40.Ke3 Rfg4 41.Rh7 Rg3 42.Kf4 R5g4 43.Kf5 Ra4–+) 40...Rg3 41.Ke2 Rb4 (41...Rg2 42.Ke3 Rf6 43.Be4 Ra2 44.Rb6 Ra3 45.Bd3–+) 42.Kf2 Ra3 43.Bf7 Rb2 44.Kg1 Rc3 (44...Rc3 45.Bc4 Rc4–+) 0–1. Babichev,Vyacheslav (1735) – Schrenk,Robert, Nuremberg Zabo op 4th, 2002.

6.g3 Qd7 7.Bg2 Nf6 A) 8.Ne2 Be7 (8...a6 9.ba6 Na6 10.e4 c5 11.Nec3 b5 12.a3 Nc7 13.Qe3 Ne6+=) 9.d3 a6 10.a4 Ra7 11.ba6 Na6 12.Nbc3 Nb4 13.Rc1 c5–/+; B) 8.c4 Be7 (8...a6 9.Nc3 ab5 10.cb5 d5 11.Qe2 Be7 12.Nf3 e4 13.Ne5 Qe6+=) 9.Nc3 a6 10.ba6 Na6 11.d4 0–0 12.Nge2 Nb4 13.0–0 Qe6+=; C) 8.a4 Be7 (8...a6 9.Nc3 d5 10.Nh3 Bd6 11.0–0 0–0 12.Rfb1 Rc8 13.d3 cb5+=) 9.d3 a6 10.Ne2 Ra7 11.ba6 Na6 12.Nbc3 Nb4 13.Rc1 c5–/+; D) 8.Nh3 a6 9.a4 Ra7 10.ba6 Na6 11.0–0 Nb4 12.Qd1 Be7 13.f4 Qg4+=; E) 8.Nc3 d5 9.Qe2 cb5 10.Nf3 Nc6 11.Qb5 Bc5 12.0–0 a6 13.Qe2 0–0+=.

6.g3 Qd7 7.Bh3 Qc7 8.Bg2 (8.Nc3 Be7 (8...cb5 9.Nb5 Qc6 10.Bg2 e4 11.Qe2 Ba6 12.Nd4 Qc7 13.Qg4 d5=; 8...Nf6 9.Bg2 d5 10.Nge2 a6 11.bc6 Bc6 12.Qf5 Nbd7 13.0–0 b5=) 9.Bg2 Nf6 10.Nge2 a6 11.d4 Ra7 12.ba6 Na6 13.a3 0–0+=) 8...d5 (8...Nf6 9.Nc3 d5 10.Nge2 a6 11.bc6 Nc6 12.Rb1 Na5 13.Qf5 d4–/+; 8...a6 9.Nc3 ab5 10.Nb5 Qd8 11.Nc3 d5 12.Nge2 e4 13.Qf5 Bc8+=; 8...Be7 9.Nc3 Nf6 10.Nge2 d5 11.0–0 0–0 12.Rab1 Rd8 13.a3 a6+=) 9.Ne2 (9.Qf5 Bd6+= 10.f4 Nd7 11.bc6 Bc6 12.fe5 Be5 13.Be5 Qe5=; 9.Qh5 e4 10.f3 cb5 11.fe4 Qc2 12.Qe5 Ne7 13.Na3 Qd3+=) 9...e4 (9...cb5 10.Nbc3 e4 11.Qh5+= (11.Qf4 Qd7 12.f3 Bd6 13.Qg5 f6+=) 11...Nd7 12.Nd4 Ngf6 13.Ncb5 Qd8=) 10.Qf4 (10.Qg4 Ne7 11.bc6 Nbc6 12.Nbc3 a6 13.Nf4 Ne5+=) 10...Bd6 11.Qg4 (11.Qf5 Ne7 12.Qg5 Rg8 13.Nbc3 h6+=) 11...g5?? (better is 11...Be5 12.Be5 Qe5= 13.Nbc3 cb5+=) 12.Bh8+– 1–0. pierre – mr_Ralf, internet, 2011.

6.g3 Nf6 7.Bg2 Be7 8.Nc3 d5 9.Qf5 Nbd7 10.Nf3 g6 (10...g6 11.Qh3 cb5 12.Nb5 Bc6=+). nitousche – janbs, ChessWorld.net, 2004.

3.e3 c6

4.a3 Nd7 5.Nf3 Ngf6 6.Be2 Be7 7.0–0 0–0 8.c4 Re8 9.d4 Qc7 10.Qc2 b6 11.Nc3 Bb7 12.Rfd1 Rad8 13.de5 Ne5 (13...Ne5 14.Rd2 Bc8+=) 0–1. Klaus Behrmann – brawn, ChessWorld.net, 2005.

4.a3 Bf5 5.c4 Qe7 6.Ne2 Qf6 7.Ng3 Qg6 8.Nf5 Qf5 9.d4 Nh6 10.Nd2 Ng4 11.Nf3 Nf6? 12.h3 Qd7? 13.de5+– de5 14.Qd7 Nbd7 15.Ne5 Ne5 16.Be5 Nd7 17.Bg3 c5 18.b5 a6 19.a4 ab5 20.cb5 Be7 21.Bc4 0–0 22.0–0 Nb6 23.Rfc1 Ra4 24.Ra4 Na4 25.Bd5 Nb6 26.Bb7 Rb8?? 27.Bc6 Rc8 28.Bf4 f6 29.Rd1 Rd8 30.Rd8 Bd8 31.Bd6 h6? 32.Bc5 Na4 33.Ba7 Nc3 34.b6 Bb6 35.Bb6 Ne2 36.Kf1 Nc3 37.Ke1 g5 38.Kd2 Nb1 39.Kc2 Na3 40.Kb3 (40…Nb1 41.Ba5+–) 1–0. slavisa10 – SirCharles, Live Game Caissa's Web, 2004.

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

4.a4 a5 5.b5 Bd7 (5...Nf6 6.d4 e4 7.c4=+) 6.d4 e4 7.d5 c5 (7...Nf6 8.dc6 bc6 9.Nd2=) 8.Nd2 Nf6 9.Rb1 b6 (9...Bf5!? 10.Ne2 Nd5+=) 10.Bf6+/– Qf6 11.Nc4 (11.Ne4 Qg6 12.Ng3 Be7+/–) 11...Qc3? (better is 11...Qd8+=) 12.Qd2+– Qd2 13.Kd2 f5 14.Nb6 Ra7 15.Ne2 Rb7 (15...Be7+–) 16.Nc4 (16.Nd7?! Nd7 17.g4 fg4+–) 16...Ra7 17.Nc3 Be7 18.b6 Ra8 19.Nb5 Na6 20.Na5 Nb4 21.Nc7 Kf7 22.Na8 Ra8 23.Bc4 Ra5 24.b7 Na6 25.Ba6 1–0. b4_player (2165) – kimanthi, GameColony.com, 2002.

4.a4 a6 5.Nf3 Nf6 6.c4 Be7 7.Be2 Nbd7 (7...e4 8.Nd4+=) 8.d3 Qc7 9.Nbd2 0–0 10.0–0 Re8 11.h3 b6 12.Qc2 Bb7 13.d4 Rac8 14.de5 de5 15.b5 (15.Bc3 c5 16.b5 a5=) 15...ab5 (15...cb5 16.ab5 ab5 17.Rfc1+=) 16.cb5+= c5 Black intends e4 (16...cb5 17.Qc7 Rc7 18.Bb5= (worse is 18.Ne5 ba4 19.Nd7 Rd7–/+)) 17.Nc4 Will e5 fall? 17...e4 18.Ng5?? (18.Nfe5 Red8+=) 18...Bd8?? (better is 18...h6 19.Nf7 Kf7–+) 19.h4 (19.Rad1 Be7=) 19...h6= 20.Nh3 Nd5 21.Rfd1 (21.h5 Ra8=) 21...Bh4 0–1. GuestGKNQ – GuestKQNY, freechess.org, 2017.

4.b5 Qb6 5.a4 Nf6 6.Nc3 Bd7 7.Nf3 Be7 8.a5 Qd8 9.Be2 cb5=+ 10.Nb5 a6 11.Nc3 Nc6 12.0–0 Na5 13.d4 ed4 14.ed4 d5 15.Qd2 Nc4 16.Bc4 dc4 17.Rfe1 b5?? 18.Ba3+/– Be6 19.Be7 Qe7 20.d5 Rd8 21.Ra6 0–0 22.Rae6?? fe6–/+ 23.Ng5? Rfe8 24.Ne6 Rb8 25.h3 Rb6 26.Qg5 Qd7 27.Re3 Rd6 28.Nb5?? Rd5–+ 29.Nc5 Rg5 30.Nd7 Re3 31.Nf6 gf6 32.fe3 Rb5 33.Kf2 Rb2 0–1. jammboy – Kevin the fruitbat, ChessWorld.net, 2009.

4.b5 Bf5 5.d4 Nd7 6.Nd2 e4 7.Ne2 d5 8.c4 dc4 (8...Ngf6 9.Ng3 Bg4 10.Be2 Be2 11.Qe2+=) 9.Ng3+= Qa5 10.Qc2 Bb4 (better is 10...Bg6!? 11.bc6 bc6 12.Nge4 Nb6+/–) 11.Nf5+– c3 12.Bc3 Bc3 13.Rd1 (13.Ng7 Kf8 14.Rc1 Bd2 15.Qd2 Qd2 16.Kd2 Kg7 17.bc6 bc6 18.Rc6 Rb8–/+; 13.Qe4?! Kf8 14.Rd1 Qa2 15.bc6 Bd2 16.Rd2 Qa1 17.Ke2 Qa6 18.Kf3 Qc6 19.Qc6 bc6+/–) 13...Kf8 14.Nd6 Bd2 15.Rd2 Qb4 16.Ne4 (16.Qe4 Qd6 17.bc6 Qc6 18.Qc6 bc6–/+; 16.Nb7?! cb5 17.Qe4 Rc8+/–; 16.bc6?! Qd6 17.cd7 Nf6 18.Qc8 Ke7 19.Qb7 Qd7 20.Qd7 Nd7+/–) 16...cb5 17.Bd3 Ngf6 (17...Ne7 18.Qc7 Rc8 19.Qd7+–) 18.0–0+– a6 19.Rb1 Qe7 20.a4 b4 21.a5 Rd8 22.Nf6 Nf6 23.Qc4 Nd5 24.e4 Nc3 25.Rb4 Nb5 (25...Ne4!? 26.Re2 f5+/–) 26.d5+– h5 27.Re2 Rh6 28.e5 Qd7 (28...h4 29.d6 Qg5 30.Qe4+–) 29.Qc5 Kg8 30.Rc4 (30.Bb5!? Qd5 31.Qd5 Rd5+–) 30...Re8 (30...h4 31.Be4+–) 31.d6 Qd8 32.h3 (better is 32.Ra4!? Qd7 33.Rb4 Na3+–) 32...Rhe6 (32...Qa5 33.Rcc2+/–) 33.Bf5 (33.Bf5 Nd6 34.Be6 Re6 35.Rd4+– (35.ed6 Re2 36.Qc8 Re1 37.Kh2 Re8+–)) 1–0. Taulien,Hans_Juergen (2225) – Thoma,Theo (1820), remoteschach.de, 2004.

4.c4 Na6 5.a3 Nf6 6.Nc3 Bg4 7.Nf3 e4 8.h3 ef3 (better is 8...Bd7!? 9.Ng1 d5=) 9.hg4+/– fg2 10.Bg2 Qc8 11.g5 Ng4? (better is 11...Nd7+/–) 12.Bh3+– f5 (12...Nf2 13.Kf2 Qc7+–) 13.gf6! h5 (13...Nf6 14.Bc8 Pinning (14.Bc8 Deflection); 13...gf6 14.Ne4 Decoy) 14.Bg4 hg4 15.Rh8 gf6 (15...Qd7 16.b5 cb5 17.Nd5+–) 16.Ne4 Qf5 (16...Qe6 17.Nf6 Ke7+–) 17.Nd6 Kd7 18.Nf5 Ke6 19.Qg4 Bb4 (19...Nc5 20.Qg8 Kf5 21.Rh5 Ke4 22.Qg6 Kf3 23.Rh3#) 20.Rh7 Bd2 21.Ke2 Rd8 (21...Be3 22.Re7#) 22.Qe4 1–0. Fournier,Frederic (2090) – Lennykarle, Active, 2012.

4.c4 b5 5.cb5+/– cb5? (5...Nf6 6.d4+/–) 6.Bb5?? (better is 6.Qf3 d5 7.Bb5 Bd7 8.Qd5 Bb5 9.Qe5 (9.Qa8 Bc6 10.Qa7 Bg2+=; 9.Qb5?! Nd7+–) 9...Ne7 10.Qb5 Nbc6 11.Qa4+–) 6...Nc6?? (6...Nd7 7.Nc3+/–) 7.Nf3 (better is 7.Bc6 Bd7 8.Ba8 Qa8 9.Nf3+–) 7...Bd7+/– 8.0–0 (8.a3 Rb8 9.Nc3 a5+/–) 8...Rb8 9.a4 Nb4 10.Bd7 Qd7 11.Nc3 Nf6 12.Rb1 Nd3 (12...e4!? 13.Ne1 d5=) 13.Ba3+= Rb1 (13...Rc8!?+=) 14.Qb1+/– Be7?? (better is 14...e4 15.Ng5 d5 16.Qb8 Qd8 17.Qd8 Kd8 18.Nf7 Ke8 19.Nh8 Ba3+–) 15.Qd3+– 0–0 16.Rb1 Re8 17.Qa6 e4 18.Nd4 Ng4 (18...Qg4 19.Rb7+–) 19.h3 (better is 19.Rb7!? Qc8 20.Re7 Nf6 (20...Qa6?? 21.Re8) 21.Qc8 Rc8 22.Ra7 d5+–) 19...Bh4 (19...Nf6 20.Rb7 Qc8 21.Ra7+–) 20.hg4 Qg4 21.Qd6 h6 22.Qf4 (22.Qf4 Qf4 23.ef4+–) 1–0. Fournier,Frederic – williamcol(C), Active, 2007.

4.c4 Qc7 5.Nc3 Nf6 6.Qc2 Bg4 7.Nf3 d5 8.a3 Be7 (8...Nbd7=) 9.0–0–0?? (better is 9.Ne5 Qe5 10.Nb5 Qb2 11.Qb2 cb5 12.cd5+–) 9...Nbd7 10.h3 Bh5 11.g4 Bg6 12.Qb3 Ne4 13.Ne4 Be4 14.Be2 0–0 15.d3 dc4 16.dc4 a5 17.Rhg1 White plans g5 17...ab4 18.ab4 b5 19.c5 Bd5 20.Qc2 Ra2 21.g5 Rfa8 22.Qf5? (22.e4 Be6 23.Bf1 Ra1 24.Kd2 R1a3–+) 22...R8a4 (22...Rb2 23.Kb2 Ra2 24.Kc1 Re2 25.Rd2 Rd2 26.Kd2–+) 23.g6? (better is 23.Rd5 cd5 24.Ne5 Ne5 25.Be5–+) 23...hg6 24.Qg4 Be6 25.Qe4 Bf5 26.Rd7 Qd7 (26...Be4 27.Rc7 Rb4 28.Re7+=; 26...Bd7?! 27.Be5 Qa7 28.Bd1–+) 27.Qe5 (27.Ne5 Ra1! 28.Ba1 Ra1 29.Kb2 Qd2 30.Ka1 Be4–+) 27...Bf6 28.Qb8 Kh7 29.Ng5 Bg5 30.Rg5 Qe7 31.Rg3 Ra1 32.Ba1 Ra1 33.Kd2 Qe4 34.Kc3 Rc1 35.Kb2 Qc2 36.Ka3 Ra1 0–1. combijack (1750) – bandolerostanco (1625), gameknot.com, 2010.

4.c4 Bd7 5.d4 Qc7 (5...e4 6.d5=) 6.Nf3 (6.Nd2 ed4 7.ed4 Bf5=) 6...Bg4 (6...e4 7.Nfd2=) 7.Be2 (7.Nbd2 Nd7+=) 7...Bf3 (7...e4 8.Nfd2 Be2 9.Qe2=) 8.Bf3+= ed4 (8...d5 9.cd5 e4 10.Be4 Bb4 11.Nd2+=) 9.Bd4+/– c5 (9...Nd7 10.Nd2+/–) 10.Bb2 (10.bc5 dc5 11.Bb2 a6+/–) 10...cb4+= 11.0–0 Nf6 (11...Nc6 12.a3+/–) 12.a3 ba3 13.Na3 Ke7?? (better is 13...Nc6+/–) 14.Nb5+– Ke8 (14...Qd7 15.Bb7!! a6 16.Nd6 Qd6+–) 15.Nc7 (15.Nc7 Kd8 16.Na8+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

4.c4 e4 5.d4 Nf6 6.Nc3 c5 (6...Be7!?=) 7.dc5+= dc5 8.Qd8 Kd8 9.0–0–0 Ke8 (9...Kc7 10.Nb5 Kb6 11.Rd8+/–) 10.bc5 (10.b5 Nbd7+=) 10...Bc5 (10...Na6 11.Be2+=) 11.Nd5 (11.Nge2 Na6+/–) 11...Nd5 12.Rd5 (better is 12.cd5 Rg8 13.Ne2+/–) 12...Be6?? (better is 12...Be7+=) 13.Rc5+– b6 (13...Nd7 14.Rc7 (worse is 14.Bg7 Rg8 15.Rg5 f6+–) 14...b6 15.Nh3+–) 14.Re5 (worse is 14.Bg7 Rg8 15.Rg5 Nd7+–) 14...Nd7 15.Re4 Rc8 16.Bg7 Rg8 17.Bd4 Rc4 18.Bc4 Rg2 19.Be6 fe6 20.Re6 Kf8 21.Nh3 Rg5 22.Ng5 h5 23.Rd1 +–. Bonetti,Shane – Toby59, ICC, 2002.

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

4.c4 Qf6 5.Qf3 Nd7 6.Qf6 Ngf6 7.Nf3 Ne4 8.d3 Nef6 9.Nbd2 Be7 10.a3 Ng4 11.h3 Nh6 12.Be2 b5 (better is 12...0–0!?+=) 13.cb5+/– cb5 14.0–0 (14.d4 a6+/–) 14...0–0 (14...f5 15.Rfc1+=) 15.Rac1 (15.d4 a6+/–) 15...Bd8? (better is 15...f5+=) 16.d4+– f6 17.de5 fe5 18.Bb5 Nf6 19.Rfd1 Bb7? (19...Nf7 20.Bc4 Be7 21.Bb3+–) 20.Bc6 (20.Nc4 Bf3 21.gf3 Be7 22.Nd6 Bd6 23.Rd6 Nf7+–) 20...Rb8 (20...Bc6 21.Rc6 Nf7 22.Kf1+–) 21.Bb7 Rb7 22.Nc4 d5 23.Nce5 Nf5 24.Nc6 Bb6 25.Bf6 gf6 26.Rd5 Nh6 27.Rdd1 Rg7 28.Ncd4 Bd4 29.Nd4 Kh8 30.g3 f5 31.Rc5 Rd7 32.Kf1 Ng8 33.Ke2 Ne7 34.Nc6 Rd1 35.Kd1 (35.Kd1 Nc6 36.Rc6+–; 35.Ne7?! Rfd8+–) 1–0. Fournier,Frederic – repasa, Active, 2007.

4.c4 h6 5.Nc3 Nf6 6.Nf3 Be7 7.Be2 0–0 8.0–0 a6 9.d4 ed4 10.Nd4 Nbd7 11.Nf5 Nb8 (11...Ne5 12.Qc2+=) 12.Ne7 Qe7 13.a4 White plans b5 13...Nbd7 14.b5 ab5 15.cb5 c5 (15...Nc5 16.a5+=) 16.Nd5 Qd8 (16...Nd5 17.Qd5 Nb6 18.Qd1+=) 17.Bf3 Nb6? (better is 17...Nd5 18.Bd5 Nb6+=) 18.Nf6+– gf6 19.Qc2 d5 (19...Nd7 20.Rfd1 Ne5 21.Bd5+–) 20.Qc5 Na4 21.Qb4 (worse is 21.Qd5 Qd5 22.Bd5 Ra5 23.Bf6 Rb5+–) 21...Nb2 (21...Nb6+–) 22.Ra8 (22.Qb2?! Ra1 23.Ra1 Qd6+–) 22...Nd3 23.Qd4 Ne5 24.Qd5 (24.Bd5!? Qe7+–) 24...Qd5 25.Bd5 Kg7 (25...b6 26.f4 Nd3 27.Rf3+–) 26.Rc1 Bd7 27.Rf8 Kf8 28.b6 Ke7 29.Bb7 f5 (29...Be6 30.Bc8 Bd5 31.f4+–) 30.Bd5 f6 (30...Be6 31.b7 Nd7 32.Be6 Ke6+–) 31.b7 Kd6 32.b8Q Kd5 33.f4 Nd3 34.Rd1 (34.Qb3 Ke4 35.Rd1 Ke3 36.Rd3 Kf4 37.Rd4 Kg5 38.Qg3 Kh5 39.Rh4) 34...Ke4 (34...Ba4 35.Rd3 Kc5 36.Rc3 Kd5 37.Qd8 Ke6 38.Rc7 Bc6 39.Re7) 35.Qd6 Bb5 (35...Ke3 36.Rd3 Ke2 37.Rd1 Bc6 38.Qd3) 36.Qd4 1–0. forsetinn – notengonick, gameknot.com, 2013.

4.Bc4 d5 5.Bb3 e4 6.a3 Bf5 7.Ne2= Nd7 8.0–0 Ngf6 9.c4 Be7 10.Nbc3 0–0 11.cd5+= cd5 12.Nd5+/– Nd5 13.Bd5 Rb8? 14.Ng3+– Bg6 15.Be4 Be4 16.Ne4 Nf6 17.Nf6 Bf6 18.Bf6 Qf6 19.d4 h6 20.d5 b6 21.e4 Rfe8 22.f3 Rbc8 23.Rc1 Rc1 24.Qc1 Qd4 25.Kh1 Qe5 26.Rd1 g5 27.d6 Rd8 28.Qc7 Qf6 29.e5 Qe7 30.Qe7 (30.Qe7 Rd7 31.Qd7 g4 32.Qg4 Kh7 33.d7 a6 34.d8Q h5 35.Qh5 Kg7 36.Qdh8#) 1–0. jammboy – philstar99, ChessWorld.net, 2009.

4.d3 Qb6 5.a3 Be6 6.Nf3 Nd7 7.Nbd2 a5 8.c3 Be7 9.d4 ab4 10.cb4 Bf6 11.Bc4 d5 12.de5 dc4 13.ef6 Ngf6 14.Qc2 Qa6 15.0–0 b5 16.Nd4 c5 17.Ne6 Qe6 18.Bc3 0–0= 19.Rfe1 Rfe8 20.e4 Rad8 21.Rad1 Re7 22.f3 Nb6 23.bc5 Na4 24.Bb4 Rc7?? 25.Ba5 Qe5 26.Bc7+– Qc5 27.Kh1 Qc7 28.Nb1 Re8 29.Nc3+– Nc3 30.Qc3 Kf8 31.Qb4 Kg8 32.Rb1 Rb8 33.a4 Nd7 34.ab5 Ne5 35.Rec1 Nd3? 36.Qc4 Qc4 37.Rc4 g6 38.b6 Ne5 39.Rc7 Nc4 40.Rc4 Kf8 41.b7 (41.b7 Kg7 42.Rc8 Rb7 43.Rb7+–) 1–0. urko – Kevin the fruitbat, ChessWorld.net, 2009.

4.d4 d5 5.a3 e4 6.c4 =.

4.d4 Nd7 5.de5 Ne5 6.Nf3 Nf3 7.Qf3 Nf6 8.a3 Be6 9.Bd3 Be7 10.0–0 0–0 11.Bf5 Bf5 12.Qf5 Re8 13.Nd2 d5 14.Nf3 Qd7 15.Qd7 Nd7 16.Nd4 Bf6=+ 17.Rad1 Rad8 18.g3 Ne5 19.c3 Nc4–/+ 20.Rb1 Nd2–+ 21.Rfd1 Nb1 22.Rb1 Bd4 23.cd4 h6 24.Rc1 Re4 25.Bc3 Rc8 26.Bd2 Re6 27.Kg2 b6 28.h4 Re7 29.Kh3 Rec7 30.Kg4 c5 31.bc5 bc5 32.dc5 Rc5 33.Bb4?? Rc1 34.Kf4 (34.h5 Rf1 35.f3 Rc4 36.f4 Rc2–+) 0–1. slavisa3 – topolov, Live Game Caissa's Web, 2004.

4.d4 f6 5.Nf3 a5 6.a3 ab4 7.ab4 Ra1 8.Ba1 Qb6 9.Bd3 Qb4 10.Bc3 Qb6 11.0–0 Be6 12.Qe1 Qc7 13.de5 fe5 14.Nbd2 Nf6 15.Ng5 Qd7 16.Ne6 Qe6 17.Bc4 d5 18.Bb3 Bd6 19.Nf3 Ne4 20.Bd2 Nd7 21.h3 h6 22.Bb4 0–0 23.Bd6 Qd6 24.Nd2 Nd2 25.Qd2 Nf6 26.Qe2 Ra8 27.Qf3 Rf8 28.Qg3 b6 29.Ra1 Qc7 30.f4 Ne4 31.Qg4 ef4 32.Qe6 Kh7 33.c4 fe3 34.cd5 cd5 35.Bd5 Qf4 36.Be4 g6 37.Ra7 (time, 1–0). ronnieg (2615) – AntyDisch (2495), fics, 2001.

4.Nf3 Be7 5.c4 Nd7 6.Nc3 Ngf6 7.Be2 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 0–0 6.Be2 Nbd7 7.Nc3 c6).

4.g3 Qb6 5.a3 =+.

4.g3 Nd7 5.Bg2 (5.f4 Qb6=+) 5...g6 (5...d5 6.a3=+) 6.Ne2 Bg7 7.0–0 Ngf6 (7...Qb6 8.Bc3=) 8.a3 (8.f4 Qb6=) 8...0–0 (8...Nb6 9.d3=) 9.c4 Re8 10.Nbc3 Qc7 11.Rc1 Nf8 (11...Nb6 12.d3=) 12.d4 ed4 (12...Bf5 13.e4 ed4 14.Qd4+=) 13.ed4 (13.Qd4 Ne6 14.Qd2 Rd8+=) 13...Bf5 14.Re1 (14.d5 c5=) 14...Ne6 (14...N8d7 15.b5=) 15.d5 Ng5 16.dc6 bc6 17.b5 Nh3 ½–½. Polonski,Vladimir – Davies,Christopher, EU–ch U14 Tallinn, 1997.

4.a3 Be6

5.c4 Nf6 6.Nf3 Nbd7 7.Be2 Be7 8.d4 Qc7 9.Nc3 h6 10.Rc1 Nb6 11.c5 Nc4 12.Bc4 Bc4 13.de5 de5 14.Ne2 Be2 15.Qe2 Nd7 16.0–0 a6 17.Nd2 0–0 18.Nc4 f6 19.Qg4 f5 20.Qg3 Bf6 21.Rcd1 Rad8 22.Nd6 f4 23.ef4 ef4 24.Qb3 Kh7 25.Qc2 Kh8 26.Rd3 Ne5 27.Rh3 b6 28.Ne4 Nd7 (28...Rde8!?+/–) 29.Nf6+– Nf6 30.Qg6 Qf7 31.Qf7 Rf7 32.cb6 Kh7 33.Rc3 Nd5 (33...Rd6 34.Rfc1 Rb7+–) 34.Rc6 Rb8 35.Rd6 Nb6 36.Bd4 Nc4 37.Ra6 Rd7 38.Bc5 Nd2 39.Re1 Ne4 40.f3 (40.h3 Nc5 41.bc5 Rb2+–) 40...Nc5 41.bc5 Rd2 42.Rb6 Ra8 43.Reb1 (43.Ra1!?+–) 43...Ra3 44.R6b2 Rb2 45.Rb2 Rc3 46.Rb5 Rc2 47.h4 Kg6 48.Kh2 Kh5 49.Kh3 Rc1 50.c6 g5 51.g4 fg3 52.hg5 (52.Kg3?! Rc6 53.hg5 hg5=) 52...hg5 53.f4 Rc6 54.Rg5 Kh6 55.Kg3 (55.Rg3!? Rg6 56.Rd3+/–) 55...Rg6= 56.Rg4 Rg4 57.Kg4 Kg6 58.f5 Kf6 59.Kf4 Kf7 60.Kg5 Kg7 61.f6 Kf7 62.Kf5 Kf8 63.Ke5 Kf7 64.Kf5 Kf8 ½–½. onny555 (1885) – joe59 (1825), gameknot.com, 2013.

5.Nf3 f6 6.c4 Ne7 7.d4 Bf7 8.de5 de5 9.Qd8 Kd8 10.Be2 Nd7 11.0–0 Kc7 12.Nbd2 Nb6 13.e4 Ng6 14.g3 Rd8 15.Bc3 Na4 16.Rfc1 Nc3 17.Rc3 Be7 18.Nb3 b6 19.c5 b5 20.a4 a6 21.ab5+/– ab5 22.Ra7 Kb8 23.Na5?? Ka7–+ 24.Nc6 Kb7 25.Nd8 Rd8 26.c6? Kc7 27.Bb5 Bb4 28.Rc1 Be6 29.Kg2 Ne7 30.Ne1 Be1 31.Re1 Nc8 (32.f4 Rd2 33.Re2 Rd4–+) 0–1. maaxa – jones662, Live Game Caissa's Web, 2004.

4.a4 Nf6

5.c4 Be7 6.d4 ed4 7.ed4 d5 8.c5 Bf5 9.Bd3 Bd3 10.Qd3 b6 11.f3 (11.a5!? Nbd7 12.Nf3=) 11...a5–/+ 12.Nd2 0–0 13.Nb3 Nbd7 14.Bc3 ab4 15.Bb4 bc5 16.dc5 Qb8 (16...Qb8 17.Qc3 d4 18.Nd4 Nd5 19.Nc6 Qe8–+) 0–1. Andersson,Lars H – Nicholls, corr ICCF EU–H–1194, 1995.

5.Be2 Be7 6.Nf3 0–0 7.0–0 Bg4 8.b5 Nbd7 9.c4 Qc7 10.d4 e4 11.Nfd2 Be2 12.Qe2 d5 13.Rc1 Qd8 14.Ba3 Ba3 15.Ra3 Qa5 16.bc6 bc6 17.cd5 cd5 18.Qb5 Qb6 19.Rc6 Qb5 20.ab5 Rfb8 21.Nc3 Rb6 22.Rc7 a5 23.Nb3 Kf8 24.Ra5 Ra5 25.Na5 Rb8 26.Nc6 Ra8 27.g4 Nb6 28.Ne5 Ke8 29.g5 (29.Rf7 Ng4 30.Rg7 Ne5 31.de5 Ra3+–) 29...Nh5 (29...Nfd7 30.Nd7 Nd7 31.Nd5 Ra1 32.Kg2+–) 30.Nf7 Ra3 31.Nd6 Kd8 32.Rc6 Kd7 (32...Rb3 33.Nce4! (33.Rb6?! Rc3 34.Nf5 Rc7+–) 33...de4 34.Nb7 Ke7 35.Rb6+–) 33.Nce4 (worse is 33.Rb6 Rc3 34.Nf5 Kc7+–) 33...de4 (33...Na4 34.Nc5 Nc5 35.dc5+– (35.Rc5?! Kd6 36.Kg2 Ra1+/–)) 34.Rb6 (34.Rb6 Rb3 35.Ne4+–) 1–0. marekt (2495) – Settebello (2245), ChessWorld.net, 2003.

5.Nf3 Nbd7 6.Be2 Be7 7.0–0 0–0 8.c4 Re8 9.Nc3 Nf8 10.a5 Bg4 11.h3 Bh5 12.a6 ba6 13.Ra6 Qc8 14.Qa4 Rb8 (14...c5 15.bc5 e4 (15...Qc5?? 16.Rc6+–) 16.cd6 ef3 17.Bf3 Bf3 18.de7 Ne6 19.gf3 Nc5+=) 15.Rc6+/– Qd7 16.b5 Ne6 17.Ra1 Rb7 18.d4 (18.d3 Reb8+/–) 18...ed4 (18...Bf3 19.Bf3 (19.gf3?! ed4 20.Nd5 de3=) 19...ed4 20.ed4 Nd4 21.Bd5+/–) 19.Nd4+– Nc5 20.Qd1 Bg6 21.Bf3 Nd3 22.Ba3 Ne5 23.Bd6! Bd6 24.Rd6! Qd6 25.Bb7 Nc4 26.Ra7 Qc5 27.Nc6 Ne3 28.Qd4 (28.fe3?! Qe3 29.Kh1 Qc3+=) 28...Qd4 29.Nd4 Nc4 30.f4 Bd3 31.Nd5 Nd7? (31...Re1 32.Kh2 Kf8+–) 32.Bc6 Re1 33.Kh2 Nf8 34.Ne7 Kh8 (34...Re7 35.Re7 Nb6 36.Rb7+–) 35.Ra8 g6 36.Rf8 Kg7 37.Rg8 Kh6 38.g4 Ne3 (38...f6 39.Nd5 Re4 40.Nf3 Rf4 41.Nf4+–) 39.g5 Kh5 40.Rh8 Ng4 41.hg4 (better is 41.Kg2 Ne3 42.Kg3 Rg1 43.Kh2 Ng4 44.Kg1 Kh4+–) 41...Kg4 42.b6 (better is 42.Nd5 Rb1 43.Bd7 Bf5 44.Bf5 gf5+–) 42...Ba6 (42...Re7 43.b7 Rb7 44.Bb7 Kf4 45.Rh7 Kg5 46.Rf7+–) 43.b7 (better is 43.Nd5 Re6 44.Ba4 Re2 45.Ne2+–) 43...Bb7 44.Bb7 (44.Nd5!? Bc6 45.Nc6 Re2 46.Kg1 Kg3+–) 44...Re7 45.Bg2 Kf4 46.Nf3 f5 47.gf6 Rf7 48.Nd2 Rf6 49.Rh7 Ke5 50.Nf3 Ke6 51.Kg3 Rf8 52.Rh6 Kf6 53.Bh3 (better is 53.Nh4!? Rf7+–) 53...Kg7 54.Rh4 Kf7 (54...Rb8 55.Ng5 Rb3 56.Kf4 Rb4 57.Ne4+–) 55.Rf4 (55.Ng5!? Ke7+–) 55...Kg7 56.Rf8 Kf8 57.Kg4 Kg7 58.Kg5 Kf7 59.Ne5 Ke7 60.Ng6 Kd6 61.Bf5 Kd5 62.Kf4 Kd4 63.Ne5 Kd5 64.Nf7 Kd4 65.Be4 Kc5 66.Ke5 Kc4 67.Nd6 Kc5 (67...Kc3 68.Bd5+–) 68.Bd5 Kb6 69.Kd4 Kc7 70.Ne4 Kd7 71.Kc5 (better is 71.Bb3!? Ke7+–) 71...Ke7 72.Kd4 Kd7 73.Ke5 Ke7 74.Be6 Kf8 75.Kf6 Ke8 76.Nc5 Kf8 77.Na6 Ke8 78.Nc7 Kd8 79.Na6 Ke8 80.Nc5 Kf8 81.Nd7 Ke8 82.Ke5 Ke7 83.Kd5 Kd8 84.Kd6 Ke8 85.Bd5 Kd8 86.Bf7 Kc8 87.Nc5 Kd8 88.Nb7 Kc8 89.Kc6 Kb8 90.Kb6 Kc8 91.Be6 Kb8 92.Bd7 Ka8 93.Na5 (93.Nc5 Kb8 94.Na6 Ka8 95.Bc6) 93...Kb8 94.Nb3 Ka8 95.Nc5 Kb8 96.Na6 Ka8 97.Bc6 1–0. Kotainy,Jens (2110) – Berchtenbreiter,Maximilian (2070), GER–ch Net qual1 U14 blitz, 2008.

4.c4 a5

5.a3 Nf6 6.Nf3 Be7 7.d3 Bg4 8.Be2 0–0 9.Nbd2 Nbd7 10.0–0 c5 (10...b5 11.Qc2=) 11.b5 Qc7 12.a4 Rfc8 13.h3 Bh5 14.Qb3 Nf8 15.Rfc1 Ne6 16.Nf1 Nd7 17.Ng3 Bg6. Fournier,Frederic (2215) – Robeson,Christian, Train France (FRA), 2001.

5.b5 cb5 6.cb5 Nf6 7.d4=.

5.b5 Be6 6.a4 (6.d4 ed4 7.Bd4 Nf6=) 6...Nf6 7.Nf3 Nbd7 8.d4 e4 9.Nfd2 d5 (9...Be7 10.Be2=) 10.Nc3 (10.c5 Be7=) 10...Bb4 11.Be2 (11.bc6 bc6 12.Be2 0–0=) 11...0–0 (11...cb5 12.cb5 Rc8 13.Rc1=) 12.0–0 Qe7 (12...cb5 13.ab5 dc4 14.Qc2+= (worse is 14.Nc4 Bc4 15.Bc4 Bc3 16.Bc3 Qc8–+; worse is 14.Bc4 Bc4 15.Nc4 Rc8–/+)) 13.c5 Bc3 (13...Rfc8!? 14.Rc1 cb5 15.Bb5 Nf8+=) 14.Bc3+/– Ne8 (14...Bf5 15.bc6 bc6 16.Nb3+/–) 15.Nb3 f5 (15...Qg5!? 16.Kh1 cb5 17.ab5 a4+/–) 16.Na5+– f4 (16...Nb8 17.Qd2+–) 17.ef4 (17.bc6 f3 18.cb7 Qg5+–) 17...Rf4 (17...Nb8 18.Bd2+–) 18.Nb7 (better is 18.Bd2 Rf7 19.Nb7+–) 18...Qg5 (18...Nb8 19.Qc1 Rh4+–) 19.Bd2 Bh3 (19...Qf6 20.bc6 Nb8 21.Bf4 Qf4 22.Bb5+–) 20.g3 Bf1 21.Bf1 Nef6 (21...Qf6 22.Bf4 Nf8 23.Be5+–) 22.Bf4 Qf5 (22...Qg6 23.bc6 Nf8 24.Bh3+–) 23.bc6 Nf8 24.Nd6 Qg6 (24...Qe6 25.Qb3 Qe7 26.Be5+–) 25.c7 Ne6 26.c8R Rc8 27.Nc8 Nf4 28.Ne7 (28.Ne7 Kh8 29.Ng6 Ng6 30.a5+–) 1–0. Janek – Vassileos, internet free game, 2017.

4.c4 a6

5.Nf3 Nf6 6.Be2 Nbd7 7.0–0 d5 8.a3 e4 9.Nd4 c5 10.bc5 Bc5 (10...dc4!? 11.Bc4 Nc5=) 11.cd5+= Nd5 12.d3 N7f6 13.de4 Ne4 14.Nd2 (14.Nb3!? Bd6 15.Bg7+/–) 14...Ndc3 15.Bc3 Nc3 16.Qc2?? (16.Qe1 Qe7 17.Bd3=) 16...Ne2?? (better is 16...Bd4 17.Bd3 Bf6–+) 17.Ne2+= b6 18.Rfd1 0–0 19.Nb3 Qg5 20.Nc5 bc5 21.Ng3 Bb7 22.Rac1 Rac8 23.f3 (23.Rd7!? Bc6 24.Ra7+=) 23...Rfe8 (better is 23...Qe3 24.Kh1 Rc7–/+) 24.e4 c4 25.Qd2 (25.Nf5 Rc5 26.Nd6+–) 25...Qc5= 26.Qd4 Attacks the isolani on c4 26...Qd4 (better is 26...h5!?=) 27.Rd4+/– c3 28.Ne2 c2 29.Rd2 Re6 30.Rdc2 Rd8 31.Nf4 Rf6 32.Nh5 Rg6 33.Ng3 Re8 34.Rc7 Rb8?? (better is 34...Rb6+–) 35.Rb1 (35.Rb7 Rd8+–) 35...h5 36.Rcb7 Rb7 37.Rb7 h4 38.Nf5 h3 (38...Re6 39.Kf2+–) 39.g3 (better is 39.Ne7 Kh7 40.Ng6 Kg6 41.Rb6 Kg5 42.Ra6 hg2+–) 39...Rc6 (39...Re6+–) 40.Ne7 (40.Ne7 Kh7 41.Nc6+–) 1–0. Fournier,Frederic – mik77, Active ajedrez21.com, 2004.

5.Nf3 h6 6.Be2 Nf6 7.d3 Be7 8.Qc2 a5 9.b5 c5 (9...cb5 10.cb5 Be6 11.0–0=) 10.0–0 Nbd7 11.Nbd2 Nb6 (11...0–0 12.d4 Qc7 13.Rfe1+=) 12.a4 (12.d4 ed4 13.ed4 0–0+/–) 12...Nh7 (12...Bf5 13.Nb3+=) 13.h3 (13.d4 ed4 14.ed4 0–0+/–) 13...Ng5 (13...Bf5 14.Nb3+=) 14.Rad1 Nh3 15.gh3 Bh3 16.Rfe1 Bg5 (16...Qd7 17.Nh2+/–) 17.Kh2 (17.d4 cd4 18.ed4 Bd2 19.Rd2 Qc8+–) 17...Qd7 18.Rg1 f6 19.Rg3 Bf5 20.Ne4 h5? (better is 20...Qe6+/–) 21.Nfg5+– (worse is 21.Neg5 h4 22.Rgg1 fg5 23.Ng5 Qe7+–) 21...fg5 22.Rg5 h4 (22...Be4 23.de4 Qe7 24.f4+–) 23.Rdg1 (better is 23.Rf5 Kd8 24.Rg5+–) 23...Rg8 (23...Be4 24.de4 Qf7+–) 24.Nf6! (24.Nf6 Kd8 25.Nd7 Bd7 26.d4 ed4 27.ed4+–) 1–0. GuestQBYN – GuestWLCL, freechess.org, 2017.

4.c4 b6

5.d4 e4 (5...ed4 6.Bd4 Nf6 7.a3=) 6.d5 c5 (6...Nf6 7.Nc3=) 7.Qa4 (7.Nd2 f5+=) 7...Bd7 (7...Qd7 8.Qc2 f5 9.a3+=) 8.b5 a6 (8...Qh4 9.Nc3+=) 9.Nd2 Qc7 (better is 9...f5!?+=) 10.Ne4+– Bf5 (10...f6 11.Nf3+–) 11.Bd3 Qb7? (better is 11...Bd7+–) 12.Nd6!! Bd6 13.Bf5 Nh6 (13...Kf8+–) 14.ba6 Qd7 (14...Kd8 15.ab7 Ra4 16.Bg7 Nf5 17.Bh8 Rc4+–) 15.Bd7 Nd7 16.Bg7 Rg8 17.Bf6 Rg2 18.Qc6 Ra6 19.Qc8 1–0. pierre (2210) – retard, internet, 2007.

5.Nf3 Qf6 (5...Nf6 6.Nc3=) 6.Be2 Be7 7.Qc2 Qe6 8.0–0 Nf6 9.Ng5 (9.d4 0–0+=) 9...Qd7 (9...Qf5 10.Qf5 Bf5 11.Nc3=) 10.d4 c5 (10...Qf5!? 11.Qf5 Bf5=) 11.de5 de5 12.Rd1 Qb7?? (12...Qf5!? 13.Qf5 Bf5 14.bc5 Nc6 15.cb6 ab6+/–) 13.Be5 (better is 13.Bf3 Nc6 14.b5+–) 13...Nc6 14.Bb2 (better is 14.Bf3 cb4 15.Bf6 gf6 16.Qe4+– (16.Nh7?! f5 17.Nf6 Bf6=)) 14...0–0?? (better is 14...Nb4 15.Qb3 Bg4+=) 15.Bf6+– cb4 (15...g6 16.Qb2 cb4+–) 16.Qh7 1–0. GuestRBHB – GuestQPDZ, freechess.org, 2017.

4.c4 Qb6

5.a3 a5 6.c5 dc5+= 7.Be5 ab4!? 8.ab4 Ra1 9.Ba1 cb4–/+.

5.a3 a5 6.c5 dc5+= 7.Be5 cb4 8.ab4+= Qb4 9.Nf3 Bg4? (9...Nf6 10.Bc3 Qd6 11.Ba5+=) 10.Bc3 (10.Ra4 Bf3 11.gf3 Qc5+/–) 10...Qb6 (10...Qe7 11.Ra4 Nf6 12.Bf6 Bf3 A) worse is 13.Be7 Bd1 14.Kd1 Be7–/+; B) worse is 13.gf3 Qf6 (13...gf6?? 14.Re4+–) 14.Rf4 Qb2+=; C) 13.Qf3 Qf6 14.Rf4=) 11.Be2 (11.Na3!? Nf6 12.Nc4+/–) 11...Bf3 12.Bf3 Nd7 13.0–0 (13.Na3 a4+=) 13...Ngf6+= 14.Qc2 (14.Na3 a4+=) 14...Be7= 15.Na3 0–0 (15...Qa6!?=) 16.Nc4+= Can a5 get defended? 16...Qc7 17.d4 (17.Ba5 b6 18.Bc3+=) 17...b5 (17...Bb4 18.g3=) 18.Ne5?? (better is 18.Na5 Ra6 19.Bd2+/–) 18...Ne5+= 19.de5 Nd7 20.Qb2 (better is 20.Qe4!? Ra6 21.Rfd1+=) 20...b4–/+ 21.Bd4 Rad8 (21...a4 22.Rfc1 a3 23.Qb1 Ne5 24.Be4–/+) 22.Rfc1 (22.e6!? fe6 23.Qa2–/+ (23.Bg7? Rf7 24.Bh6 Bf6–+)) 22...c5 23.Qe2 Qb6 (better is 23...Ne5 24.Be4 Nd7–+) 24.Bb2+= Qb8 25.Ra5 Ne5 26.Be5? (better is 26.Be4!?=) 26...Qe5–/+ 27.Rcc5?? (better is 27.Qc4–/+) 27...Bc5–+ 28.Qb5 (28.Qc2 Rc8 29.g3 Bd6–+) 28...Qc3 29.g3 (29.h3 Bd6 30.Qf1 b3–+) 29...Rc8 (29...Be3 30.Kg2 Rd2 31.Kh3 Rf2 32.Qb7–+) 30.Qd7 (30.Bd5 Be3! 31.Ra2 Bd4–+) 30...b3 31.Rb5 b2 (better is 31...Be3 32.Qd1 Qb2 33.Kg2 Qf2 34.Kh3–+) 32.Bd5 (32.Qb7 Rb8! 33.Qb8 Rb8 34.Rb8 Bf8–+) 32...Qc1 33.Kg2 b1Q 34.Bf7 Kh8 (34...Kh8 35.Rb1 Qb1–+) 0–1. GuestCNQL – GuestHCVZ, freechess.org, 2017.

5.a3 a5 6.c5 dc5 7.Be5 Nd7 8.bc5= Qc5 9.Bd4 (9.Bf4 Ngf6=) 9...Qd5 10.Nc3 Qe6 11.Na4 (11.Nh3!?=) 11...Ngf6+= 12.Nf3 b5 13.Nb6 Nb6 14.Bb6 Be7 15.Qc2 0–0 (15...Ra6!? 16.Bc5 Qf5 17.Qf5 Bf5+=) 16.Nd4+= Attacking the backward pawn on c6 16...Qd7 (better is 16...Qd5!? 17.Nc6 Bd6+=) 17.Qc6+– (17.Qc6 Bb7 18.Qb5+/–) 1–0. GuestQRYP – GuestSXFT, freechess.org, 2017.

5.a3 Nf6 6.Nf3 (6.d4 e4=) 6...Bg4 (6...Be7 7.Be2=) 7.Nc3 Nbd7 (7...Be7 8.Be2=) 8.h3 Bf3 (8...Bh5 9.g4 Bg6 10.Nh4=) 9.Qf3 Be7 (9...c5 10.b5+=) 10.Bd3 (10.Be2 Nc5+=) 10...a5 11.Na4 (11.0–0 0–0+=) 11...Qc7= 12.0–0 0–0 (12...d5 13.cd5 Nd5 14.b5+=) 13.Rfc1+= Qb8 (13...ab4 14.ab4 Ra7 15.Nc3 Ra1 16.Ra1+=) 14.Bc3 (14.Nc3 Nb6+=) 14...ab4 (14...d5 15.cd5 (15.ba5? e4 16.Qe2 ed3 17.Qd3 Ne5 18.Be5 Qe5–+) 15...cd5 16.Bf5= (16.ba5? e4 17.Qf5 ed3–+)) 15.ab4 Re8 (15...d5 16.cd5 cd5 17.Bf5=) 16.e4 (16.Bf5 Qc7+=) 16...h6 (16...b6 17.Nb2+=) 17.b5 (17.Nb2 Nf8+=) 17...cb5 18.cb5 b6 (18...Rc8 19.Nb2+=) 19.Bb2 (19.Bc4 d5 20.ed5 Qd6+=) 19...Bf8 (19...Rc8 20.Nc3+=) 20.Bc4+/– Nc5 (20...d5 21.ed5 Bb4 22.d3+/–) 21.Nc5 (21.Nc3 Be7+/–) 21...bc5 (21...dc5 22.Qf5 Ra1 23.Ra1+/–) 22.d3 Ra7 (22...Qb7 23.Qf5+/–) 23.Bc3 Qb7 (23...Ra1 24.Ra1 Qb7 25.Bd2+/–) 24.Ra7 Qa7 25.Ra1 (25.Bd2 Be7+/–) 25...Qb7 26.Ra6 Ra8 (26...Be7 27.Qe2 Rf8 28.Qa2+–) 27.Qe2 (27.Qd1 Be7+/–) 27...Ra6 (better is 27...Rb8!?+/–) 28.ba6+– Qa7 29.Qb2 (29.Qb2 Nd7 30.Qb7 Qb7 31.ab7+–) 1–0. Janek – Ferenc, internet, 2017.

5.Qb3 Na6 6.Bc3 =+.

5.Qb3 Be6 6.Nc3 Nf6 7.a4 a5 8.b5 c5 9.Be2 Nbd7 10.Nf3 h6 11.Nd5 Bd5 12.cd5 Qc7 13.d4 b6 14.de5 de5 15.Bc4 Bd6+= 16.0–0 1–0. chessleon (2010) – jerrytong, net–chess.com, 2006.

5.d4 Qb4 6.Bc3 Qb6 7.Bd3 g6 (7...ed4 8.ed4 Be7 9.Nf3+=) 8.Nf3 Nf6 (8...f6!?=) 9.de5+= Ng4? (better is 9...de5!? 10.Ne5 Bg7+=) 10.ed6+– f6 11.h3 Ne3 12.Qe2 Bd6 13.Bd4 Qb4 14.Nbd2 0–0 15.Be3 (15.Qe3?! c5=) 15...Qa5 16.0–0 Nd7 17.Ne4 Be7 18.Bh6 Re8 (18...Rd8+–) 19.Nd6! Qd8 (19...Bd6 20.Qe8 Pinning (20.Qe8 Deflection; 20.Qe8 Clearance)) 20.Qe6 Kh8 21.Nf7 Kg8 22.N7g5 Kh8 23.Qf7 Nf8 (23...fg5 24.Bg7) 24.Qg7 1–0. aspasio (2865) – hurble, net–chess.com, 2014.

4.c4 d5

5.a3 dc4 6.Bc4 b5 7.Ba2 (7.Bb5 cb5 8.Qf3 Bd7 9.Qa8 Bc6 10.Qa7 Bg2 11.Be5 Nc6–/+) 7...a5 (better is 7...e4=) 8.Qb3?? (better is 8.Qh5 Qe7 9.Qe5 Qe5 10.Be5 ab4 11.ab4+=) 8...Be6–/+ 9.Qc2? (better is 9.Qc3 Ba2 10.Ra2–/+) 9...ab4?? (better is 9...Ba2 10.Ra2 A) 10...ab4?! A1) 11.Be5 Qd5 (11...ba3?! 12.Ra3 Ra3 13.Na3+=) 12.Nc3 bc3–+ (12...Qe5?! 13.Nf3 Qf6 14.ab4 Ra2 15.Na2–+); A2) 11.Nf3–/+; B) 10...Qd5–+) 10.Be6= (worse is 10.Be5 Ba2 (10...ba3?! 11.Bb8 Rb8 12.Be6 fe6 13.Qc6 Qd7 14.Qd7 Kd7 15.Na3=) 11.Qa2 ba3–/+) 10...fe6 11.ab4 Bb4?? (better is 11...Ra1 12.Ba1 Qg5=) 12.Ra8+– Nf6 (12...Bd6 13.Nf3 Qc7 14.Qb3+–) 13.Be5 Nbd7 (13...Bd6 14.Bf6 gf6+–) 14.Qc6 Qa8 15.Qa8 Ke7 16.Qh8 (16.Bf6!? Kf6 17.Qh8 Nf8+–) 16...Ne5 17.Qg7 Ke8 18.Qf6 (18.Qf6 Nc4 19.Qe6 Kd8 20.Qd5 Nd6 21.Qd4 Bd2 22.Nd2+–) 1–0. Labahn,Wolfgang – Baaske, Espelkamp, 1980.

5.a3 dc4 6.Bc4 e4 7.Qc2 Qe7 8.Ne2 +=.

5.a3 Nd7 6.cd5 cd5 7.Nf3 =.

5.a3 e4 6.f3 Nf6 7.Nc3 Qc7 8.Rc1 Be6 9.cd5 Nd5 10.fe4 Nc3 11.Bc3 (worse is 11.dc3 Bd6 12.Nf3 0–0=) 11...Bd6 12.Nf3 0–0 13.e5 Be7 14.d4 Bg4 15.Be2 Bf3 16.Bf3 b5 17.0–0 Qd7 18.Bb2 Bg5 19.Qb3 a5 20.ba5 Ra5 21.Qc3 Ra6 22.Be4 f5 23.ef6! Rf6 (23...Rf6 24.Qd3 Combination; 23...Bf6 24.Qb3 Double attack; 23...gf6 24.Qb3 Double attack) 24.Rf6 Bf6 25.Rf1 c5? (better is 25...Qe7 26.Qc2 g6+–) 26.Qc5 Rd6 27.Rf5 Na6 28.Qb5 Qd8 29.Rd5 Nc7 30.Rd6 Qd6 31.Qb3 Kf8 32.a4 Bd8 (32...Be7 33.Bh7 Ne6+–) 33.Ba3 (33.Ba3 Be7 34.Bd6 Bd6 35.Bh7+–) 1–0. Van Esbroeck,Dirk – Korystin,Pavel, SN–2009–0–00164, 2009.

5.Be5 Qe7 6.Bc3 Be6 +/–.

4.c4 Nd7

5.d4 Ngf6 6.Nc3 Be7 7.Nf3 0–0 8.Be2 Qc7 9.0–0 e4 10.Nd2 d5 11.Rc1 Qb8 12.Qb3 Nb6 13.c5 Nbd7 14.b5 a6 15.a4 Qc7 (15...Re8!?=) 16.f3+/– ef3 17.Bf3 Re8 18.e4 de4 19.Nde4 Bf8 (19...ab5 20.ab5 Ne4 21.Ne4+–) 20.Ng5 (20.Ng5 Re7 21.Rce1+–) 1–0. Trkn – guest1107, ICC, 2004.

5.Nf3 e4 6.Nd4 c5 7.Nc2 (7.bc5 dc5 8.Nb3 Ndf6 9.d4 cd4 10.Qd4 Be6) 7...Ne5 (7...Ngf6 8.d3 Ne5 9.de4 Ne4 10.Nc3 Bf5; 7...cb4 8.Nb4 Ngf6 9.d3 Ne5 10.Nd5 Bg4; 7...Ndf6 8.Nc3 Bg4 9.Be2 Be2 10.Qe2 cb4) 8.d4 ed3 9.Bd3 Be6 10.bc5 Qa5.

5.Nf3 e4 6.Nd4 Ne5 A) 7.d3 d5 8.cd5 Bb4 9.Bc3 Bc3 10.Nc3 c5; B) 7.a3 Bg4 (7...Be7 8.d3 Bg4 9.Qc2 c5 10.Nb5 a6; 7...Nf6 8.d3 Bg4 9.f3 Bh5 10.Be2 ed3; 7...Qg5 8.f4 Nd3 9.Bd3 Qg2 10.Be4 Qe4; 7...c5 8.Nb5 a6 9.N5c3 Bf5 10.Nd5 cb4) 8.Qc2 Nf6 9.d3 c5 10.Nb5 a6; C) 7.h3 Nf6 (7...Qg5 8.Nc3 Nf6 9.Qb1 Qg6 10.a3 Be7; 7...Qb6 8.a3 a5 9.Nc3 Nf6 10.Qc2 ab4; 7...c5 8.bc5 dc5 9.Nb5 Nc6 10.d3 a6) 8.d3 d5 9.c5 a5 10.de4 Ne4; D) 7.Nc3 Nf6 8.a3= c5 9.Nb3 Be6 10.Qc2 Bf5.

5.Nf3 e4 6.Nd4 Ngf6 7.Nc3 (7.d3= d5 (7...Ne5 8.de4 a5 9.b5 Ne4 10.Qc2 Nc5) 8.c5 Qc7 9.de4 de4 10.Nc3 b6) 7...g6 (7...Ne5!?= 8.a3 c5 9.Nb3 Be6 10.Qc2 Bf5; 7...c5 8.bc5 dc5 9.Nb3 b6 10.d3 Bb7; 7...a5 8.b5 Ne5 9.d3 c5 10.Nc2 ed3) 8.d3 (8.Qc2 Qe7 9.b5 cb5 10.Ndb5 Nc5) 8...ed3 (8...d5 9.a3 Bg7 10.cd5 cd5) 9.Bd3 Bg7 (9...Ne5 10.0–0 Bg7) 10.0–0 Ne5 (10...0–0+=) 11.Be2 Be6? (11...0–0 12.a3+=) 12.Ne6 (better is 12.f4!? Ned7 13.Ne6 fe6 14.Qd6+–) 12...fe6+= 13.a4 (13.b5 0–0=) 13...0–0= 14.Qb3 (14.f4 Nf7 15.Qd2 d5=) 14...d5 (better is 14...a5=) 15.Rfd1 (15.cd5 Nd5 16.Ne4 Qe7=) 15...Qe7 (15...Nfg4 16.Rf1 Qh4 17.h3 Nf2 18.cd5 Nh3 19.gh3 Qg3 20.Kh1–+) 16.b5 (16.cd5 ed5 17.e4 Qf7 18.ed5 Rad8=) 16...Rfd8 (better is 16...Nfg4!? 17.Rf1 Qh4–/+) 17.Ba3 (17.a5 Rac8=) 17...Qc7 18.Rac1 c5?? (18...Neg4 19.g3 Qf7 20.cd5 cd5 21.Kg2=) 19.a5?? (19.cd5 c4 20.d6 cb3 21.dc7 Rdc8+–) 19...b6? 20.ab6 ab6+= 21.Ra1 Neg4–/+ 22.g3 Qe5 23.Na4 Rd6 24.Bb2 Qf5 25.f3+= Ne5 26.g4?? Nf3–+ 27.Kh1 Qg4 28.Bf6?? Bf6 29.Rf1 Qh4 30.Bf3–/+ Ba1 31.Ra1 Rf8 32.Rf1? Qh3–+ 33.Qd1 h5?? 34.cd5 Rd5!–/+ 35.Qe2 Rd2! (35...Rd2 36.Bg2 Qh2 37.Kh2 Re2 38.Rf8 Kf8 39.Nb6 Re3–+) 0–1. Figiel,Rafal – Lipko,K, casual, 2001.

5.Nf3 Ngf6 6.d4 b6 7.de5 (7.Nc3!?+=) 7...de5= 8.a3 (8.Qa4 Bb7=) 8...e4 9.Ne5 (9.Nfd2 a5 10.g4 h6=) 9...Bb7 (9...Qc7 10.Nd7 Bd7 11.Qc2+=) 10.Nd7= Nd7 (10...Qd7 11.Qd7 Kd7 12.Nc3=) 11.Be2 (11.Nc3 Qe7+=) 11...c5 (11...Qc7 12.Nc3 f5 13.Bh5 Ke7 14.0–0+=) 12.0–0+= cb4 13.ab4 f6? (13...Bb4 14.Bg7 Rg8 15.Bd4+=) 14.Qd2 (14.Qb3 Qe7 15.Bc3 Kf7+/–) 14...Be7 (14...Ne5!? 15.Qc2 Nd3+/– (15...Bb4?? 16.Be5 0–0 17.Bd4+–)) 15.Rd1+/– Ne5 (15...a6 16.c5+–) 16.Qd8 Rd8? (16...Bd8 17.Be5 fe5 18.c5+/–) 17.Rd8?? (17.Ra7 Rd1 18.Bd1 Bc8+–) 17...Bd8?? (better is 17...Kd8 18.Ra7 Kc7+=) 18.Ra7+– Nd3 19.Bd3 ed3 20.Rb7 0–0 21.Bd4 Re8 22.Bb6 Be7 23.Bd4 Kf8 24.c5 Ra8 25.c6 Ra2 26.c7 Re2 27.c8Q Kf7 28.Qc4 Kg6 29.Qd3 f5 30.Qe2 (30.Qe2 Kf7 31.Qc4 Kg6 32.Re7 Kh5 33.Rg7 h6 34.Bf6 f4 35.Qd5) 1–0. Bonetti,Shane – guest894, ICC, 2002.

5.f4 Ngf6 6.fe5 de5 7.a3 a5 8.b5 Be7 9.Nf3 e4 10.Nd4 cb5 11.cb5 Nc5 12.Be2 Bd7 (12...Bg4! 13.0–0 Be2 14.Qe2 Nd3+=) 13.0–0= 0–0 14.Qe1 (14.Nc3 Rc8=) 14...Nd3 (14...Na4 15.Bc3+=) 15.Bd3= ed3 16.Nf5 Bf5 17.Rf5 Ne4 18.Rf4 (18.Nc3 Nc3 19.Bc3 Bd6=) 18...Bf6 (better is 18...f5!?+=) 19.Bf6+= (19.Re4? Bb2 20.Nc3 Ba1 21.Qa1 Qg5–+) 19...Nf6 20.Nc3 Qb6 21.Rc1 Rac8 22.a4 Rfd8 23.Qh4 Nd5 24.Rd4 Nc3? (24...Nb4 25.Rd8 Qd8 26.Qd8 Rd8 27.Nd1=) 25.Rd8 (25.Rc3!? Rf8 26.Rdd3+/–) 25...Rd8+= 26.Rc3 h6? (26...Qd6 27.Rc4 f6 28.Qd4+/–) 27.Qc4 (27.Qe7!?+–) 27...Qf6 (27...Qd6 28.Qc7 b6 29.Qd6 Rd6 30.Rc6+–) 28.Rc1 (28.Qc7!?+/–) 28...b6= 29.Qc6 Qb2 30.Qc3 Qb4 (30...Qa2!? 31.Qc7 Rf8=) 31.Qb4+/– ab4 32.Rc4 b3 33.Rb4 Ra8 34.Rb3 Ra4 35.Rd3 Rb4 36.Rd5 Kf8 37.Kf2 Ke7 38.Kf3 Ke6 39.e4 g6 40.g4 Rb3 41.d3 f6 42.h4 f5 43.gf5 gf5 44.Kf4 fe4 45.de4 Rb4 46.Rh5 Kf7 47.Rh6 Rb5 48.Rd6 Rh5 49.Kg4 Re5 50.Kf3 Rh5 51.Rb6 Rh4 52.e5 Ra4 53.Ke3 Ke7 54.Rd6 Rh4 55.Rd4 (better is 55.Kd3!?+/–) 55...Rh3 56.Ke4 Rh4 57.Kd5 Rh1 (better is 57...Rd4!? 58.Kd4 Ke8=) 58.e6 ½–½. Lais,Klaus Joerg – Brueck,Bruno, Saarland–chC, 1993.

4.c4 Be7

5.Nf3 Nf6 6.Be2 Nbd7 7.d3 a6 8.a3 b5 9.Nc3 0–0 10.0–0 Bb7 11.e4 Nb6 12.cb5 ab5 13.Qb3 Bc8 14.a4 Be6 15.Qc2 ba4 16.Na4 Qc7 17.Nb6 Qb6 18.Bc3 h6 19.Nd2 c5 20.bc5 Qc5 21.Ra8 Ra8 22.Rc1 Rc8 23.Bd1 Qa7 24.Qb2 Bd8 25.Nb3 Bb6 26.Be1 Rb8 27.Qa1 Qa1 28.Na1 Bd4 29.Nc2? Bb6 30.Rb1?? Bf2!–+ 31.Kf2 Rb1 32.Ke2 d5 33.ed5 Nd5 34.Na3 Ra1 35.Nc4 Nc3! 36.Bc3 Bc4?? 37.Ba1+– Ba6 38.Be5 f6 39.Bb3 Kf8 40.Bd6 Ke8 41.Ke3 Kd7 42.Bf8 Bb7 43.Bg7 Bg2 44.Bf6 h5 45.Be5 h4 46.d4 h3 47.d5 Ke7 48.Kd4 Kd7 49.Kc5 Kd8 50.Kc6 Kc8 51.Kd6 Kd8 52.Bf6 Kc8 53.Ke7 Kc7 54.d6 (54.d6 Kb8 55.d7 Bh1 56.d8Q Kb7 57.Qd7 Ka6 58.Bc4 Kb6 59.Bd4 Ka5 60.Qb5) 1–0. Fournier,Frederic (1630) – JUCASA, Active, 2007.

5.Nf3 Nf6 6.Be2 Bg4 7.h3 Bh5 8.d3 0–0 9.Nbd2 Bg6 10.0–0 b6 11.a3 a5 12.e4 ab4 13.ab4 Ra1 14.Qa1 Nbd7 15.Qa7 c5 16.bc5 bc5 17.Ra1 Qb8 18.Qb8 Rb8 19.Bc3 Nh5 20.g3 Nhf6 21.Nh4 Bf8 22.Ng6 hg6 23.Ra7 Kh7 24.Bd1 Rb1?? 25.Nb1+– g5 26.Ba4 Nb8 27.Rf7 Kg6 28.Rf8 Nbd7 29.Bd7 Nd7 30.Rd8 Nb6 31.Rd6 (31.Rd6 Kf7 32.Rb6+–) 1–0. Fournier,Frederic (2045) – samuro (1820), Active (5/0), 2004.

4.c4 f5

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

5.Nf3 Nf6 6.d4 e4 7.Nfd2 Be7 8.Nc3 Be6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be6 6.d4 e4 7.Nfd2 c6 8.Nc3 Be7).

5.Nf3 Nf6 6.Be2 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 c6).

4.c4 Bf5

5.Nf3 Qb6 6.Bc3 =.

5.Nf3 Nd7 6.Be2 Be4 7.Nc3 f5 8.d3 Bf3 9.Bf3 (worse is 9.gf3 Qg5=) 9...Ngf6 10.0–0 Be7 11.b5 Rc8 12.Bh5 g6 13.Bf3 0–0 14.a4 Nc5 15.d4 Nce4 (15...ed4!? 16.ed4 Nce4+=) 16.de5+/– de5 17.Ne4 fe4 18.Bg4 Ng4 19.Qg4 Bf6 20.Qe4 c5? (better is 20...Qc7!?+/–) 21.Qb7+– Rc7 22.Qe4 Qd2 23.Ba3 (23.Be5 Re8 24.f4 Be5 25.fe5 Rce7+–) 23...Bg7 24.Rad1 Qa5 25.Qd5 Kh8 26.Bc5 Rg8 27.Bd6 Rd7 28.Qe6 (28.Qe6 Rb7 29.Be5 Qa4 30.Qd5+–) 1–0. Wall,Bill – JMM, chess.com, 2009.

5.Nf3 h6 6.Be2 Nf6 (6...Na6 7.a3=) 7.0–0 Be7 8.d4 e4 9.Nfd2 0–0 10.Qb3 d5 11.Nc3 Be6 12.f3 ef3 13.gf3 (13.Nf3 Re8=) 13...Bh3 14.Rf2 Nbd7 15.Bf1 (15.b5 Be6=) 15...Bf1 (15...dc4 16.Nc4 (worse is 16.Qc4 Be6 17.d5 Nb6–/+) 16...Be6 17.a4=) 16.Raf1= dc4 17.Nc4 Nh5 (17...Nb6 18.Rg2=) 18.Ne2 (18.d5 cd5 19.Nd5 Re8+=) 18...Kh8 (18...Nb6 19.Rc1=) 19.e4 Qc7 (19...Nhf6 20.Rg2=) 20.e5 (20.b5 Rac8=) 20...Kh7 (20...Nb6 21.Rc1+=) 21.f4 Nb6 22.Ne3 g6 (22...Rad8 23.Qd3 Kh8 24.a3=) 23.a3 a5 (23...Bh4 24.Rg2+=) 24.f5 Bg5? (better is 24...ab4!? 25.fg6 fg6 26.Rf7 Ng7 27.Qb4 Rae8+=) 25.fg6+– Kg6 26.Qd3 Kg7 27.Nf5 Kh8 28.Nd6 Nd5?? 29.Rf7 Be3 30.Kh1 Rf7 31.Rf7 Ng7 32.Rc7 Rf8 33.Rf7 Rg8 34.Qg6 Nf4 35.Qh6 1–0. Huelle,Gunter – Gregor,Hans, Chemnitz op, 1998.

4.c4 Nf6

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

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

4.c4 g6

5.Nc3 Bg7= 6.Nf3 Nf6 7.d4 e4 8.Nd2 d5 9.b5 Nbd7 10.bc6 bc6 11.Qa4 Qb6 12.Rb1 Qc7 13.Ba3 Nb6 14.Qa5 Rb8 15.Be2 Nfd7? 16.cd5+– Nd5 17.Qc7 Rb1 18.Bd1?? Rd1–+ 19.Nd1 Nc7 20.Ne4 Ba6 21.Nd6–/+ Ke7 22.Nb5 Kd8 23.Na7 Nb8 24.Nc3 Ne6 25.Kd2 Kc7–+ 26.Rb1 Nd7 27.d5?? Bc3–+ 28.Kc3 cd5 29.Nb5 Bb5 30.Rb5 Rb8 31.Ra5? Kc6–+ 32.Be7 Ne5 33.Bh4 Rb7 34.a4 Nc5 35.Bg3 f6 36.Ra8 Rb3 37.Kc2 Ra3 38.a5 Nc4 39.Rc8 Kb5 40.Rc7 h5 0–1. kehrsam – Kevin the fruitbat, ChessWorld.net, 2009.

5.d4 Qe7 6.Nf3 Bg7 7.Be2 e4 8.Nfd2 Nf6 9.0–0 0–0 10.Nc3 h5 (10...Nbd7 11.a3+=) 11.h3 Bf5 12.Qb3 Nbd7 13.Ba3 (13.a4 d5+=) 13...h4 14.Rfe1 g5 (14...a6 15.Bb2+=) 15.Nf1 (15.Bb2 Qe6+=) 15...g4= 16.hg4 Ng4 17.Qd1 (17.Nd2 Ngf6=) 17...Nh6 18.Nh2 (18.Bb2 Qg5=) 18...Qg5 (18...h3 19.g3+=) 19.Kh1= Nf6 20.Rg1 Rae8 21.f4 (21.Qa4 Nhg4 22.Bg4 Ng4 23.Ng4 Qg4=) 21...Qg6 (21...ef3!? 22.gf3 Qe3–+) 22.Qe1+= Nfg4 23.Qh4 Nh2 (23...Ne3 24.g4 Bd7=) 24.Kh2+= Bf6 25.Qg3 Ng4 26.Bg4 Bg4 27.Rh1 Kg7 28.Kg1 Rh8 29.Kf2 Rh5 30.Rh2 (30.b5 Reh8 31.bc6 bc6 (31...Rh1 32.Rh1 Rh1 33.cb7–+) 32.Rh5 Rh5–+) 30...Rh2+= 31.Qh2 Rh8 32.Qg1 Bd4 33.ed4 e3! 34.Ke1 (34.Ke3 Re8 Decoy) 34...Qc2 35.Rc1 (35.Bc1 Qc3 36.Kf1 Qc4 37.Ke1 Qe2) 35...Qd2 (35...Rh1 36.Rc2 Rg1) 36.Kf1 e2 37.Kf2 e1Q 0–1. Karali,A – Grivas,E, Athens, 1981.

5.d4+= Bg7 6.de5 Be5 7.Be5 de5 8.Qd8 Kd8 9.Nc3 Nd7 10.Nf3 f6 11.Rd1 Ne7 12.Ne4 Kc7 13.Be2 b6 14.0–0 Nf5 15.Rd2 h5 16.Rfd1 Rh7 17.a4 Bb7 18.c5 g5? (better is 18...bc5 19.bc5 Rb8+/–) 19.Bc4+– Re8 (19...Bc8 20.Be6 Nc5 21.Nf6 Ne6 22.Nh7+–) 20.Rd7! Rd7 21.cb6 ab6 22.Rd7 Kd7 23.Nf6 Ke7 24.Ne8 Ke8 25.Ne5 Nd6 26.Be2 h4 27.a5 ba5 28.ba5 Nb5 29.Nf3 Nc3 30.Kf1 Ne2 (30...Ne4 31.Bd3 Nc5 32.Ke2+–) 31.Ke2 c5 32.Ng5 Bg2 33.e4 Kd7 34.f4 c4 35.f5 Kd6 (35...c3 36.Kd3 c2 37.Kc2 Bf1+–) 36.a6 Bf1 37.Kf1 c3 38.Ke2 Kc5 39.Kd3 (39.a7!? c2 40.a8Q Kb4+–) 39...Kb4 40.Kc2 1–0. forsetinn (1745) – jevgeni, gameknot.com, 2013.

5.Be2 Bg7 6.Nf3 f5 7.d3 Nf6 8.Nbd2 0–0 9.0–0 Be6 10.a3 Bf7 11.Qc2 Re8 12.Rfe1 Nbd7 13.Rad1 Rc8 14.Ng5 e4 (14...Qe7 15.Nf7 Qf7 16.d4+=) 15.Nf7 Kf7 16.de4 Ne4? (better is 16...fe4 17.Bd4 Kg8+=) 17.Bg7 Kg7 18.Ne4 fe4 19.Qc3 (19.Rd6!? Qe7 20.Red1 Nf6+–) 19...Qf6 20.Qf6 Nf6 21.Rd6 Rcd8 22.Red1 Rd6 23.Rd6 Rf8 24.Bd1 h5 25.h3 g5 26.Bc2 g4 27.hg4 Ng4 (27...hg4!? 28.Kh2 Rc8+–) 28.Rd7 Kf6 29.Be4 Ke5 30.Bf3 Nf6 31.Rb7 h4 32.Ra7 Rd8 33.Re7 Kd6 34.Rh7 Ke5?? 35.Rh4+– Rd3 36.a4 Rc3 37.c5 Rb3 38.a5 Rb4 39.Rb4 (39.Rb4 Nd5 40.Bd5 Kd5 41.a6 Kc5 42.Rb2 Kc4 43.a7 Kc3 44.Rb8 Kd3 45.a8Q Kc2 46.Qc6 Kd3 47.Kf1 Kd2 48.Rd8) 1–0. Fournier,Frederic – epereira, Active, 2007.

5.f4 Bg7 6.Nf3 Nh6 7.Qc2 0–0 8.fe5 de5 9.Be5 (9.Ne5 Bf5 10.Qc1 Qh4 11.Kd1 Ng4 12.Ng4 Qg4 13.Ke1 Qh4 14.g3 Qe4+=) 9...Be5 10.Ne5 Bf5 11.Bd3 Bd3 (11...Qg5 12.Bf5 Nf5 13.0–0 Ne3 14.de3 Qe5 15.Nc3=) 12.Qd3 Qh4 13.g3 Qf6 14.Qc3 Na6 15.Nd7 Qc3 16.Nc3 Rfd8 17.Ne5 f6 18.Nf3 Nb4 19.Rb1 c5 20.0–0 b6 21.d4 (21.a3 Nc2 22.Rb3 Rd3+/–) 21...Nc2 (21...Ng4!? 22.Nd1 Re8+=) 22.Nd5 Nf5 23.dc5 Nce3 24.Ne3 Ne3 25.Rfc1 bc5 26.Rb7 Rdb8 27.Rcb1 Rb7 28.Rb7 Nc4 29.Rc7 Rb8 30.Rc5 Ne3 31.Ra5 Rb1 32.Kf2 Ng4 33.Kg2 Rb2 34.Kg1 Rb7 35.Ra4 Ne5 36.Nd4 h5 37.Ra6 Rb4 38.Nb3 h4 39.Ra7 hg3 40.hg3 Nf3 41.Kf2 Ng5 42.Nd2 Ne6 43.Ke3 f5 44.a3 Rg4 45.Kf2 Kf8 46.Nf3 Nc5 47.Nd2 Ke8 48.Kf3 Rd4 49.Ke3 Rd3 50.Kf4?? Rd2–+ 51.Rg7 Ne6 (51...Ne6 52.Ke3 Rc2–+) 0–1. Adams,Jonathan (1625) – McNabb,Matthew David (1715), NZL–ch Major op, 1999.

4.d3 Nf6

5.Be2 Qb6 6.a3 a5 7.Nd2 Be6 8.d4 e4 9.c4 =.

5.Nf3 a5 6.a3 ab4 7.ab4 Ra1 8.Ba1 Be7 9.Be2 0–0 10.0–0 Na6 11.Bc3 Qb6 12.Nbd2 Be6 13.Qb1 Nd5 14.Nc4 Qb5 15.Bd2 Nf6 16.Na5 e4 17.c4+/– Qh5 18.Nd4 Bg4 19.Bg4 Ng4 20.h3 ed3? 21.hg4+– Qg4 22.Nb7 Qc8? 23.Na5 Nb4 24.Bb4 c5 25.Ndc6 Bd8 26.Nd8 Rd8 27.Bc3 Qf5 28.Rd1 g5 29.Qd3 Qd3 30.Rd3 Rd7 31.Be5! (31.Be5 f5 32.Rd6 Rd6 33.Bd6+–) 1–0. HELTERSKELTER – WaterDragon, ChessWorld.net, 2008.

5.Nf3 Be6 6.Be2 a5 7.b5 cb5 8.d4 e4 9.Bb5 =.

5.Nf3 Qb6

6.a3 Be6 7.d4 e4 8.Ng5 =+.

6.a3 Be7 7.Nbd2 0–0 8.Be2 Be6 9.Ng5 =.

6.a3 a5

7.d4 e4 8.Ng5 h6 –/+.

7.c3 Nbd7

8.Nbd2 d5

9.Nb3 ab4!? A) 10.cb4 A1) 10...Ra7 11.Be2 (11.Nbd2 Bd6 12.Be2 0–0 13.Qc2 Re8 14.0–0 Qc7 15.Rfb1 Ra8 16.Kh1 Ng4 17.Rf1+=) 11...Bd6 12.0–0 0–0 13.Qc2 Qc7 14.Nc5 Re8 15.h3 Nb8 16.Rfc1 b6 17.Nb3=; A2) 10...Bd6 11.Qc2 (11.Be2 c5 12.d4 cd4 13.ed4 e4 14.Nh4 Nf8 15.Bc1 h6 16.f4 Qc7 17.g3+=) 11...0–0 12.Be2 Qc7 13.Rc1 Rd8 14.Nh4 Nb8 15.0–0 Re8 16.h3 Qb6 17.Nf3+=; B) 10.ab4 B1) 10...Ra6 11.Ra6 (11.Ra5 Bd6 12.Be2 0–0 13.Ra6 ba6 14.Ba3 Qc7 15.h3 Rd8 16.0–0 e4 17.de4=) 11...ba6 12.Be2 Bd6 13.0–0 0–0 14.Qd2 Re8 15.Ra1 Qb8 16.h3 c5 17.Nc5=; B2) 10...Ra1 11.Qa1 (11.Ba1 Bd6 12.Be2 0–0 13.Qc2 Qc7 14.e4 c5 15.bc5 Nc5 16.Nc5 Qc5 17.0–0+=) 11...Qc7+= 12.Be2 Bd6 13.h3 0–0 14.0–0 b6 15.c4 dc4 16.dc4 e4 17.Nfd4=.

9.Nb3 g6 10.Be2 (10.ba5 A) 10...Qd8 11.Be2 (11.c4 Bd6 12.cd5 cd5 13.Be2 Qe7 14.0–0 0–0 15.Rc1 Re8 16.Rc3 b6 17.Qc2+=) 11...Bd6 12.c4 dc4 13.dc4 Qc7 14.Qc2 0–0 15.Rd1 e4 16.Nfd2 Re8 17.g4+/–; B) 10...Qc7+= 11.Rb1 (11.c4 Bd6 12.cd5 Nd5 13.e4 N5f6 14.d4 0–0 15.Bd3 Re8 16.Qc2 ed4 17.Bd4=) 11...Bd6 12.Be2 0–0 13.Qc2 Re8 14.c4 e4 15.Nfd4 Ne5 16.cd5 ed3 17.Bd3+=; 10.c4 A) 10...dc4 11.Ne5 (11.dc4 ab4 12.Ne5 ba3 13.Nd7 Qb4 14.Nd2 Qb2 15.Rb1 Nd7 16.Rb2 ab2 17.Qc2=) 11...Ne5 12.Be5 Bg4 13.f3 Qe3 14.Qe2 Qe2 15.Be2 Bg7 16.dc4 a4 17.Nc5+/–; B) 10...ab4 11.Ne5 Qd8 12.Nd7 Bd7 13.ab4 Bb4 14.Nd2 Be7 15.Ra8 Qa8 16.Qf3 Qd8 17.cd5+=) 10...Bg7 (better is 10...ab4 11.ab4 (11.cb4 Bd6 12.0–0 0–0 13.Qc2 Qc7 14.Nc5 Re8 15.Nd7 Bd7 16.Rfc1 Qb6 17.Bc3=) 11...Ra1 12.Qa1 Bd6= 13.0–0 0–0 14.Nc5 e4 15.de4 de4 16.Nd7 Bd7 17.Ng5+=; 10...e4 11.ba5 (11.de4 de4 12.Nfd2 a4 13.Nc1 Ne5 14.Qc2 Bf5 15.c4 Qc7 16.h3 h5 17.c5+=) 11...Ra5 12.de4 de4 13.Nfd2 Ra4 14.c4 Rg8 15.Qc2 Be7 16.Bd4 c5 17.Nc5+/–) 11.Na5?? (better is 11.ba5 A) 11...Qc7 12.Qc2+= (12.0–0 e4 13.de4 de4 14.Nfd2 Ne5 15.Qc2 Bf5 16.Rab1 0–0 17.c4+=) 12...h6 13.0–0 0–0 14.c4 Rd8 15.cd5 Nd5 16.Rfd1 Re8 17.Rac1+/–; B) 11...Ra5 12.c4 Ra8 13.Ne5 Nc5 14.Nc5 Qb2 15.d4 Ne4 16.Ne4 de4 17.h3=; 11.0–0 ab4 12.cb4 Qc7 13.Qc2 0–0 14.Rfc1 Qd6 15.d4 e4 16.Ne5 Qb8 17.Nd7=) 11...Ra5–/+ 12.ba5 (12.c4 c5 13.ba5 Qb2–/+) 12...Qb2–+ 13.Qc1 Qc1 (13...Qb5 14.0–0–+) 14.Rc1 e4 15.Nd2 (15.de4 Ne4 16.Nd4 Bf8–/+) 15...ed3–+ 16.Bd3 Nc5 17.Be2 Nfe4 18.Ne4 de4 19.0–0 (19.h4 Ke7–+) 19...Be6 20.Rb1 Kd7 (20...Bc3?! 21.Rfc1 Ba2 22.Rc3 Bb1 23.Rc5=) 21.a6 (21.Rfc1 Ra8 22.a6 ba6–+) 21...ba6 22.f3 ef3 23.gf3 Kc7 24.Kf2 (24.Rfd1 Bc3 25.Kg2 Be5–+) 24...Rd8 (24...Na4 25.Ba6 Ra8 26.Rb7 Kd6 27.Rd1 Kc5 28.Bd3–+) 25.Rfd1 Rd1 (25...Bc3?! 26.Rd8 Kd8 27.Rc1–+) 26.Rd1 a5 27.c4 Bb2 0–1. Gibbons,R (2095) – Garbett,P (2325), Open, Auckland NZL, 2003.

9.Qc2 Bd6 10.Nb3 ab4+= 11.ab4 (11.cb4 Qc7 12.Be2 0–0 13.Nc5 Re8 14.Nd7 Qd7 15.0–0 Qf5 16.Rac1 Qg6 17.Rfe1+=) 11...Ra1 12.Ba1 0–0 13.Be2 Re8 (13...Qc7 14.0–0 e4 15.de4 de4 16.Nfd2 Bh2 17.Kh1 Re8+=) 14.e4 (14.0–0 Qc7 15.e4 b5 16.Rb1 Rd8 17.Bb2+=) 14...Nf8 (14...c5 15.bc5 Nc5 16.Nc5 Qc5 17.0–0+=) 15.0–0 Ng6 16.Bb2 Be6 (16...Nf4 17.Bc1+=) 17.Nbd2 (17.Ng5 Bd7=) 17...Nf4 18.Bd1 de4 19.de4 c5 20.Ng5 (20.c4 Qc7+=) 20...cb4–/+ 21.Ne6 Ne6 (21...fe6?! 22.Nc4 Qa6 23.Nd6 Qd6 24.cb4=) 22.Nc4 Qc6 (22...Qa6 23.Be2 bc3 24.Bc3–/+) 23.Nd6 (23.cb4 Nd4 24.Bd4 ed4=) 23...Qd6–/+ 24.cb4 Nd4 25.Qa4 b5 26.Qa5 Qc6 27.Bd4= ed4 28.Be2 Qe4 29.Bb5 Rb8 30.Rd1 h5 31.Bd3 Qf4 32.h3 Ne4 33.Be4 Qe4 34.Qh5 Rb4+= 35.Qg4 Qg4 36.hg4 f6 37.Kf1 Kf7 38.Ke2 Ke6 39.Ra1 Ke5 40.Ra5= Kf4 41.Ra7 Rb2–/+ 42.Ke1 g5 43.Ra6 Ke5 44.g3 Ke4 45.Rf6= Kd3 46.Kf1 Rb1 47.Kg2 Kc2 48.f4 gf4 49.gf4 d3 50.Kf2 d2–/+ 51.Rd6? Rb3?? 52.Rd2?? Kd2–+ 53.g5 Kd3 54.Kf3 Kd4 55.Kg4 Ke4 56.f5?? Rb1 57.f6 Rg1 58.Kh5 Kf5 59.Kh6 Rg5 60.f7= Rg6 61.Kh7 Rf6 62.Kg7 Rg6 63.Kh7 Rf6 64.Kg7 Rf7 ½–½. Gibbons,R (2095) – Morrison,Ch (2180), Open, Auckland NZL, 2003.

9.Qc2 Bd6 10.Be2 A) 10...0–0 11.0–0 Qc7 12.Rfb1 Re8 13.c4 ab4 14.ab4 Ra1 15.Ba1 b6 16.c5 bc5 17.bc5=; B) 10...ab4 11.cb4 (11.ab4 Ra1 12.Ba1 0–0 13.0–0 Qc7 14.Bb2 Re8 15.e4 b5 16.Ra1 Bb7 17.Nb3+=) 11...0–0+= 12.0–0 Rd8 13.Rfc1 Re8 14.Nh4 Nf8 15.Nb3 Rd8 16.Nf3 Ng6 17.d4=; C) 10...Ra7 11.Nh4 (11.Nb3 ab4 12.cb4 0–0 13.0–0 Qc7 14.Rfb1 e4 15.de4 de4 16.Nfd2 Bh2 17.Kh1=; 11.0–0 0–0 12.Rfb1 ab4 13.ab4 Ra1 14.Ra1 Rd8 15.Ra8 Qc7 16.Ra7 c5 17.bc5=; 11.d4 e4 12.Nh4 Bf8 13.c4 ab4 14.c5 Qd8 15.ab4 Ra1 16.Ba1 Nb8 17.g3+=) 11...Nb8 12.Nhf3 Bg4 13.h3 Bh5 14.0–0 0–0 15.c4 ab4 16.ab4 Ra1 17.Ba1=; D) 10...Qc7 11.0–0 0–0 12.Rfb1 ab4 13.ab4 Ra1 14.Ra1 b5 15.Rc1 Bb7 16.Ra1 Ra8 17.Ra8+=.

9.c4 ab4 10.ab4 Ra1 11.Qa1 e4 12.de4 de4 =.

4.d4 ed4

5.Qd4 Bf5 6.Bc4 (6.c4 Nd7=) 6...d5 (6...Qg5 7.g3+=) 7.Bb3 (7.Bd3 Qg5 8.Qe5 Ne7=) 7...Nf6 (7...Qg5 8.g3+=) 8.Nf3 Be7 (8...a5 9.ba5 Qa5 10.Nbd2=) 9.0–0= Na6 (9...0–0 10.Rd1=) 10.a3 Nc7 11.c4 dc4 12.Bc4 Qd4 (12...Be6 13.Bd3=) 13.Nd4+= Be6 14.Ne6 Ne6 15.Be6 (15.Rd1 a5 16.b5 Rd8 17.Rd8 Kd8+=) 15...fe6= 16.Nc3 Kf7 17.Rad1 (17.Rfd1 b5=) 17...Rhd8 (17...b5 18.Na2+=) 18.f3 (18.Rd8 Rd8 19.Rd1 Rd1 20.Nd1 c5 21.bc5 Ne4=) 18...Rd1 19.Rd1 (worse is 19.Nd1 a5–/+) 19...Nd5 (19...b5 20.Ne2+=) 20.Nd5 ed5 21.e4 de4 (21...a5 22.b5=) 22.fe4 g6 (22...a5 23.Rd7 ab4 24.ab4=) 23.Kf2 (23.Rd7 Rd8 24.Rd8 Bd8=) 23...Ke6 (23...a5 24.ba5 Ra5 25.Rd7=) 24.Ke2 (24.Bc3 c5=) 24...a5+= 25.Bc3 (25.ba5 Ra5 26.Rd3 Bd6+=) 25...ab4 26.ab4 Ra4 27.Rd4 Ra3 28.Rd3 Rb3–/+ 29.Rh3 Bb4 30.Bb4 Rb4 31.Rh7 Re4 32.Kd3 Rb4 33.Kc3 Rb1 34.g4 c5 35.h4 b5 36.Rc7 Rc1 37.Kb2 Rc4 38.Rc6 Kf7 39.h5 gh5 40.gh5 b4 41.Rc7 Ke6 42.Rc8 Kd7 43.Rh8 Rh4 44.h6 Kc7 45.h7 Kb7 46.Kb3 Rh3 47.Kc4 b3 48.Rg8 b2 49.Rg1 Rh7 50.Rb1 Kc6 51.Rb2 Rh4 52.Kc3 Rh1 53.Rg2 Rc1 54.Kb2 Rc4 55.Rg8 Rh4 56.Kc3 Rh1 57.Rc8 Kb6 58.Rg8 Rc1 59.Kb3 ½–½. Schumcher,Dirk – Neumann,Frank, SF Schwerin II–Warnemuende, 2001.

5.Qd4 Nf6 6.Nf3 c5 (6...Bg4 7.Nbd2=) 7.bc5+= d5 (7...Nc6 8.Qa4+=) 8.Nbd2 Na6 (better is 8...Nc6!? 9.Bb5 Bd7 10.Bc6 Bc6+=) 9.Ba6+– ba6 10.Nb3 (10.c4 Be6+–) 10...Bb7 (10...Be6 11.Qa4 Qd7 12.c6+–) 11.0–0 Ne4 (11...Rc8 12.Ne5+–) 12.Qa4 (12.Ne5 f6 13.Qa4 Ke7+–) 12...Qd7 13.Qd7 Kd7 14.Na5 (14.Ne5 Ke8 15.c6 Bc8+–) 14...Nc5 (14...Bc8 15.c6 Kc7 16.Rfd1+–) 15.Nb7 Nb7 16.Rad1 Nd6 (16...Rc8 17.Rd5 Ke8 18.Rc1+–) 17.Rd5 g6?? (better is 17...Rb8 18.Be5 Rb5+–) 18.Bh8 Rb8 (18...Rc8 19.Nd4+–) 19.Rfd1 Ke6 (19...Rb5+–) 20.Ng5 Kd7 21.Nf7 a5 22.Be5 Rb6 23.Nd6 1–0. Namasivayan,Manohar – Perez,Armando, IECC, 1996.

4.d4 e4

5.c4 d5 6.a3=.

5.c4 Nf6 6.d5 Nbd7 (6...Be7 7.Nc3=) 7.Nh3 (7.Qc2 Qe7=) 7...Ne5+= 8.Nc3 (8.Ng1 Be7+=) 8...Bh3–/+ 9.gh3 cd5 (9...Nf3!? 10.Ke2 Ne5 11.dc6 bc6+= (11...Nc6?! 12.Bg2=)) 10.Nd5= Nd5 (10...Be7 11.Be2=) 11.Qd5+= Ng6? (11...Qb6 12.0–0–0 A) 12...Qb4? 13.Be5 Rc8 14.Bd4+– (worse is 14.Bd6 Bd6 15.Qd6 Qd6 16.Rd6 Ke7+–); B) 12...Be7+=) 12.Qb7+– a5? (12...f5 13.c5 Qc8 14.Bb5 Kd8+–) 13.c5 (13.Qc6!? Ke7 14.Qe4 Kd7 15.Qb7 Ke6+–) 13...ab4 (13...Qc8 14.Bb5 Kd8 15.Qe4 f5 16.Qe8 Kc7 17.cd6 Kb8+–) 14.Bb5 1–0. Janek – cuugin, internet, 2016.

5.Nd2 d5 6.a3 Nf6+=.

5.Nd2 f5 6.Bc4 (better is 6.d5!?=) 6...d5–/+ 7.Bb3 (7.Be2 Qg5 8.Bf1 Bb4–/+) 7...b5 (7...Qg5!? 8.g3 Bb4–/+) 8.a3 Nf6 9.f3 (9.Ne2 Bd6+=) 9...h5 (9...Bd6 10.Ne2–/+) 10.Nh3 (10.Bc3 Bd6+=) 10...Nbd7 (10...ef3!? 11.gf3 Bd6+=) 11.0–0= Bd6 12.fe4 (12.Nf4!?=) 12...fe4+= 13.Ng5? (better is 13.Nf2+=) 13...Ng4 14.Nf7? (better is 14.Nde4 Bh2 15.Kh1 de4 16.Bf7 Ke7 17.Bg6–+) 14...Ne3 (14...Bh2 15.Kh1 Qh4–+) 15.Qe2?? (better is 15.Nd6 Ke7 16.Nf5 (16.Nc8?! Qc8 17.Qe2 Nf1 18.Rf1 Nf6+/–) 16...Nf5 17.Rf5+–) 15...Bh2+= 16.Kh2 Qh4 (better is 16...Nf1!? 17.Rf1 Qh4 18.Kg1 0–0=) 17.Kg1+= Nf1 18.Rf1 (18.Nh8!? Ng3 19.Qe1+/–) 18...Rf8 (18...0–0 19.Nd6 Rf1 20.Nf1=) 19.Nd6 Kd8 20.Rf8 Nf8 21.N2e4 (21.Nf7 Kc7 22.Bd5 cd5 23.Qb5=) 21...Bg4?? (better is 21...de4!? 22.d5 Qe7 23.Nc8 Rc8 24.dc6 a6+=) 22.Qf1 (22.Qf2 Qf2 23.Nf2+= (worse is 23.Kf2 de4 24.d5 Kc7 25.Ne4 Re8–/+)) 22...Kc7?? (22...de4 23.Qf8 Kd7 24.Qa8 Qe1 25.Kh2 Qh4 26.Kg1 Qe1 27.Kh2 Qh4 28.Kg1=) 23.Qf7?? (better is 23.Nb5!? Kb6 24.Nec3+–) 23...Nd7 (23...Bd7 24.Nb5 cb5 25.Bd5 Qe1 26.Kh2 Qh4 27.Kg1 Qe1 28.Kh2 Qh4 29.Kg1=) 24.Nb5 (24.g3 Qd8 25.Nb5 Kb6 26.Bd5 Kb5 27.Bc4 Kb6+/–) 24...Kb6 (24...cb5 25.Bd5 Rf8 26.Qg7 Qe1 27.Kh2=) 25.Bd5 (better is 25.g3 Qd8 26.Bd5 cd5 27.Qd5+–) 25...Rd8?? (25...Qe1 26.Kh2 Qh4 27.Kg1 Qe1 28.Kh2 Qh4 29.Kg1=) 26.Bc6 (26.g3 Qh3 27.Qf4 Ne5 28.Qe5 cb5+–) 26...Kc6?? (better is 26...Rf8 27.g3 Qh3 28.Qf8 Nf8+–) 27.Qc4+– Kb7 (27...Nc5 28.Qc5 Kd7 29.Qc7 Ke6 30.Qe5 Kf7 31.Ng5 Kg6 32.Qe4 Kg5 33.Qe7 Kg6 34.Qh4 Rc8+–) 28.Ned6 Kb6 (28...Ka8 29.Qc6 Kb8 30.Qb7) 29.Qc7 Ka6 30.Qa7 1–0. Trkn – Seventh Samurai, itsyourturn.com, 2000.

4.Nf3 Qb6

5.a3 a5 6.c4 Nf6 (6...ab4 7.Qb3= Nf6 8.d4 e4 9.Nfd2 Be7 10.ab4 Ra1 11.Ba1 d5=; 6...Bg4 7.b5 cb5 8.cb5 Nf6 9.h3 Bf5 10.Nc3 Be7 11.g4 Be6=) 7.Be2 (7.b5 Be7= 8.Nc3 0–0 9.d4 e4 10.Nd2 cb5 11.Nb5 Bg4=; 7.Qa4 Be7 8.d4 e4 9.Nfd2 Ra7 10.c5 ab4 11.Nc4 Qc5=) 7...Bf5 (7...ab4 8.Qb3+= Nbd7 9.Qb4 Qb4 10.ab4 Ra1 11.Ba1 h6=) 8.0–0 (8.b5 Be7= (8...cb5 9.cb5 Be7 10.Nc3 0–0 11.0–0 Rc8=) 9.Nc3 0–0 10.0–0 Rc8 11.d4 cb5=) 8...ab4 9.c5 (9.Qb3 c5= (9...Nbd7 10.ab4 Ra1 11.Ba1 Nc5=) 10.Nc3 Nc6 11.ab4 Ra1+=) 9...dc5+= (worse is 9...Qc5 10.ab4 Ra1 11.bc5 Rb1 12.Qb3 Rf1 13.Bf1+–) 10.Be5 (10.Ne5 ba3 11.Nc4 Qd8+=) 10...Be7 11.d4 Nbd7 (11...cd4+=) 12.dc5 Qd8 (12...Nc5 13.ab4 Ra1 14.bc5 Qb1 15.Ba1 Qd1 16.Rd1 Bc5 17.Bf6 gf6 18.Nd4 Bd4 19.ed4–/+) 13.Bd4 (13.ab4!? Ne5 14.Qd8 Rd8 15.Ne5+=) 13...Nc5 (13...ba3!? 14.Na3 Nc5–/+) 14.ab4= Ra1 15.Ba1 Qd1 16.Rd1 (worse is 16.Bd1 Ncd7 17.Be2 Bb4–/+) 16...Nb3 17.Bc3 (17.Bf6 Bf6 18.Bc4 Na1=) 17...Bc2+= 18.Rf1 Nd5 19.Bg7 (19.Bc4 A) worse is 19...Nb4 20.Na3 (worse is 20.Bg7 Rg8 21.Be5 b5 22.Bb3 Bb3+=) 20...Bd3 21.Bb3+/–; B) worse is 19...Nc3 20.Nc3 0–0 21.Ne1=; C) 19...0–0 20.b5 Nc3 21.Nc3 Na5=) 19...Rg8+= 20.Bb2 (20.Be5 Bb4 21.Nd4 Be4+=) 20...Bb4 (20...Nb4 21.Nc3+=) 21.Nd4 Nd4 22.Bd4 c5 23.Be5 (23.Bf3 cd4 24.Bd5 d3–/+) 23...Ke7–/+ 24.Bc4 Be4 25.g3 Bf3 (25...Rg5 26.Bb8–/+) 26.Bd5 Bd5 27.Bc3 Ra8 (27...Bc3 28.Nc3 Bc6 29.Rb1–/+) 28.Bb4+= cb4 29.e4 Bc4 (29...Be4? 30.Re1 f5 31.f3+–) 30.Rc1 b5 (30...Bd3 31.Rd1 Be2 32.Rd2+=) 31.Nd2 b3 (31...Bd3 32.Nb3+=) 32.Rb1 (32.Nc4? bc4 33.Rc4 b2–+) 32...Ra3 33.f4 (33.f3 Kd6+=) 33...Kd6 (33...Bd3 34.Rb3 Rb3 35.Nb3 Be4 36.Kf2+=) 34.e5 (34.Kf2!?+=) 34...Kc5 35.f5 (35.Kf2!?–/+) 35...Kb4–+ 36.Re1 (better is 36.e6 fe6 37.f6–+) 36...b2 37.e6 fe6 38.fe6 (38.f6–+) 38...Ra1 39.Kf2 Re1 40.Ke1 Be6 41.Kd1 Bf5 (41...Bf5 42.g4 Bg4 43.Kc2 Ka3 44.Nb1 Ka2 45.Nc3 Ka1–+) 0–1. Apgar,Robert F – Chase,C (2330), US Amateur Team East, Parsippany USA, 2005.

5.a3 Nf6 =.

4.Nf3 f5

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

5.c4 Nf6 6.d4 e4 7.Nfd2 Be6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be6 6.d4 e4 7.Nfd2 c6).

4.Nf3 Bg4

5.Be2 Qb6 6.a3 =.

5.Be2 Nd7 6.d3 (6.0–0 Ngf6=) 6...Ngf6 (6...d5 7.Ne5 Be2 8.Qe2 Bb4 9.Nd2=) 7.Nbd2 (7.0–0 Be7=) 7...Be7 8.0–0 0–0 (8...a5 9.a3=) 9.c4 Re8 (9...a5 10.b5=) 10.Qb3 (10.h3 Be6=) 10...Bf8 (10...a5 11.h3 Bh5 12.a3=) 11.Ne4 (11.h3 Bf5=) 11...h6 (11...Ne4 12.de4 a5 13.a3=) 12.Ng3 (12.h3 Be6=) 12...a6 (12...a5 13.a3=) 13.a4 White intends b5 13...a5 14.b5 Nh5 (14...d5 15.h3 Nc5 16.Qc2 Bf3 17.Bf3 cb5 18.ab5 dc4 19.d4=) 15.Nh5+= Bh5 16.Ba3 (16.Rab1 Nc5 17.Qc2 Bg6=) 16...c5 (16...Bg4 17.Qc2=) 17.Rae1 f5 (17...Be7 18.Bb2+=) 18.Nd2 (18.Bb2 g6+=) 18...Be2 19.Re2 Qh4 20.Bb2 Nf6 (20...Be7 21.f4+=) 21.Qd1 (21.f4 e4+=) 21...Re6 (21...Qh5 22.e4+=) 22.f3 (22.f4 Qh5+/–) 22...Rae8+= 23.Qe1 (23.e4 g6+=) 23...Qh5 (23...Qe1 24.Rfe1 g6 25.Nb3=) 24.Qf2 (24.Rff2 Be7=) 24...g5 (24...d5 25.cd5 Nd5 26.Nc4=) 25.Rfe1 (25.Bc3 b6+=) 25...Bg7 26.Nf1 (26.e4 g4+=) 26...Qg6 (26...e4 27.Rd2=) 27.d4 (27.e4 Rf8+=) 27...e4 (27...Nd7 28.d5 R6e7 29.e4=) 28.d5 (28.Ng3 f4 29.Nf1 ef3 30.Qf3 Qe4=) 28...R6e7 29.Bf6 ef3 (29...Bf6 30.fe4 Re4 31.Ng3 Rc4 32.Nf5=) 30.gf3 (better is 30.Be7!? fe2 31.Ng3+=) 30...Bf6+= 31.Kh1 Bc3 32.Rd1 f4 33.e4 Qh5 (33...g4 34.Qg2+=) 34.Qg2 (34.Nd2 Kh7=) 34...Rg7 35.h3 Kh8 (35...Qg6 36.Rc1 Be5 37.Nd2=) 36.Nh2 (36.Nd2 Qg6=) 36...Qg6 37.Rd3 (37.Ng4 Bd4=) 37...Bd4+= 38.Rdd2 (38.Nf1 b6=) 38...h5 (38...Rge7 39.Rd3+=) 39.Rd1= b6 40.Rf1 Rf8 41.e5 (better is 41.Rfe1+=) 41...Rc7?? (better is 41...Qd3–/+) 42.ed6+= Qf6?? (42...Rd7 43.h4+=) 43.Ree1 (43.dc7 Be3+–) 43...Bg1?? (43...Rd7+/–) 44.d7 (better is 44.Re6 Qg7 45.dc7 Bd4+–) 44...Qg6?? (44...Be3 45.Re2=) 45.Ra1 (45.Re6!? Qg7 46.Rg1 g4 47.hg4 h4+–) 45...Ra8?? (better is 45...Bd4 46.Ra2 Rd7=) 46.Rf2 (better is 46.Rg1 g4 47.Qb2 Kh7+–) 46...Qh7?? (46...Bf2 47.Qf2 Rd7 48.Rg1–+) 47.Nf1 (better is 47.Qg5 Rd7 48.Rg1 Rg7+–) 47...Qf5?? (better is 47...Bf2 48.Qf2 Rd7–/+) 48.Qg4 (better is 48.Kg1 Rd7 49.Re1+–) 48...Rca7 (48...hg4 49.Kg1 gh3 50.Re1 Rd7 51.Kh1–+) 49.Nh2 (better is 49.Qf5 Bf2 50.Qf6 Kh7 51.d8Q Rd8 52.Qd8+–) 49...Qg6 (better is 49...hg4 50.fg4 Qe5 51.Rg1 Qe4 52.Nf3 Qc4–+) 50.Rg1 (better is 50.Qg1 Rd7 51.Re1+–) 50...Rc8 0–1. Kool,Gerard – Middelburg,Tom, Enschede, 1998.

5.Be2 Nf6 6.0–0 h6 7.c4 Nbd7 8.d4 e4 9.Nfd2 Bf5 10.f3 Be7 11.fe4+/– Be4 12.Ne4 Ne4 13.Nc3 Ndf6 14.Ne4 Ne4 15.Bd3 d5+= 16.cd5 Qd5 17.Qc2 f5 18.Rad1 Bb4 19.Bc4 Qd6?? 20.Rf5+– Nf6 21.Re5 Kd8 22.d5 Kc7? 23.dc6 Qc6 24.Re7!! Be7 25.Be5 Kc8 26.Be6 Nd7 27.Bd7 Kd8 28.Bc6 (28.Bc6 Bd6 29.Rd6 Ke7 30.Rd7 Ke6 31.Qg6 Ke5 32.Rd5#) 1–0. lasker (2125) – am4chess, internet, 2007.

5.h3 Bh5 (5...Be6 6.Be2=) 6.Be2 Nf6 7.0–0 Be7 (7...Qb6 8.Bc3=) 8.c4 0–0 9.d3 Nbd7 (9...a5 10.b5=) 10.Nbd2 (10.Nc3 a5 11.b5 Qc7=) 10...Qc7 (10...a5 11.b5=) 11.Rc1 (11.a3 a5=) 11...d5 (11...a5 12.b5=) 12.cd5 Nd5 13.b5 Rab8 (13...Rfd8 14.d4=) 14.Qb3 (14.d4 Bf3 15.Bf3 Qa5+=) 14...Bd6 (14...Rfc8 15.d4=) 15.Ne4 (15.d4 Rfc8+=) 15...N5f6 (15...a6 16.d4 ed4 17.Nd6 Qd6 18.Ba3+=) 16.Nd6+= Qd6 17.Rfd1 (17.d4 Bf3 18.Bf3 Rfc8+/–) 17...Rfc8 (17...Rfd8 18.Ba3 Qc7 19.Be7+=) 18.g4 (18.Ba3 Qc7+=) 18...Bg6= 19.Qa3 White launches an attack 19...Qa3 20.Ba3 cb5 21.Bd6 Rc1 22.Rc1 Re8 23.Rc7 Re6 24.Ba3 (24.Bb4 h6+=) 24...h6 25.g5 (25.Bb2!?+=) 25...hg5+= 26.Ng5 Rc6 27.Rb7 a6 (27...Ra6 28.Bb4 Bf5 29.a3+/–) 28.Ra7 Threatening mate... how? 28...Rb6 (28...Nf8 29.Ra8 N6d7 30.Bg4+–) 29.Bc5! Rb8 (29...Nc5 30.Ra8 The nicest combinations are those leading to mate) 30.Bd6 Rc8 (30...Rd8 31.Ra6 Nd5 32.Ra7+–) 31.Kg2 (31.Ra6 Nh7 32.Nh7 Kh7+–) 31...Nb8 (31...e4 32.d4 Nb8 33.Bb8 Rb8 34.Ra6+–) 32.Ra8 (32.Be5?! Nc6 33.Rc7 Rc7 34.Bc7 Nb4=) 32...Nfd7 33.e4 (33.Bg4 f5 34.Bf3 Bf7 35.Nf7 Kf7 36.Bd5 Kf6+–) 33...f6 34.Bg4 Re8 35.Be6 Kh8 36.Nf7 Bf7 37.Bf7 Rd8 38.Be6 Nf8 39.Bc7 (39.Rb8 Rb8 40.Bb8 Ne6+=; 39.Bb8? Ne6 40.Kf3 Kh7–+ (worse is 40...Rd3 41.Kg4–/+)) 39...Ne6 40.Bd8 Nd7 41.Bf6 Kh7 42.Be7 Ndc5 43.Bc5 Nc5 44.Rd8 Ne6 45.Rd6 Nf4 46.Kf3 a5 47.d4 Nd3 (47...b4 48.de5 Nh3 49.Ra6+–) 48.d5 Kg8 49.Rb6 b4 50.d6 Nc5 51.Rb5 Nd7 52.Rb7 Nc5 53.Re7 Kf8 54.Re5 Nd7 55.Ra5 (55.Ra5 Kf7 56.Ra7+–) 1–0. Schellen,Anton – Sarihan,Mustafa, FICGS, 2006.

3.e3 Nc6

4.a3 a5 5.b5 Na7 (5...Nce7!?=) 6.d4+= e4 7.c4 c6 8.d5 cb5 9.cb5 a4 10.Qd4 f5? (better is 10...Bf5+/–) 11.b6+– (11.Qa4?! Bd7+/–) 11...Nc6 12.dc6 bc6 13.Nc3 Ra6 (13...Be6+–) 14.Ba6 (14...Ba6 15.Nd5+–) 1–0. Trkn – guest1950, ICC, 2004.

4.a3 b5 5.c4 (better is 5.Bb5!? Bd7 6.d4+/–) 5...bc4= 6.Bc4 a6? (6...Nge7 7.d4 ed4 8.ed4+=) 7.Nf3 (7.Qf3 Qd7 8.Bf7 Kd8+–) 7...e4 (7...Nge7 8.e4 Ng6 9.0–0+=) 8.Nd4 (better is 8.Bd5 Nge7 9.Be4+–) 8...Nd4 9.Bd4 d5 10.Bb3 c6 11.Ba4 Bd7 12.Qc2 Rc8 13.d3 Nh6? (better is 13...Qg5 14.g3 ed3 15.Qd3 a5 16.ba5 Qd8=) 14.de4+– Qg5 15.ed5 (15.0–0 Qg6 16.ed5 Qc2 17.Bc2 cd5+–) 15...Qd5? (better is 15...Qg2!? 16.Rf1 Qd5+=) 16.0–0+– Nf5 17.Qb2 (17.Bc3 Nh4 18.e4 Qd6+–) 17...Nh4 (17...Nd4 18.ed4 Be6 19.Re1+/–) 18.f3 Bg4?? (better is 18...c5 19.Bd7 Kd7 20.bc5 Bc5+–) 19.e4 (19.fg4!? f6+–) 19...Qg5 20.fg4 Qg4 21.Qf2 f6 22.h3 Qe4 (22...Qd7 23.Rd1 Ng6 24.Bf6+–) 23.Nd2 (better is 23.Re1 Nf3 24.gf3 Qe7+–) 23...Qd5 (23...Qg2 24.Qg2 Ng2 25.Kg2+–) 24.Rae1 Be7 25.Bb3 (better is 25.Qh4 Rd8 26.Bc5 Rd7+–) 25...Qb5 (25...Qg2 26.Qg2 Ng2 27.Kg2 Rd8+–) 26.Qh4 Rd8 (26...Rc7 27.Bf6! gf6 28.Qf6 Qf1 29.Nf1+–) 27.Qe4 (better is 27.Rf6 Rd7 28.Rf7 Qb7+–) 27...Rd7 28.Qe6 (better is 28.Qg4 Kd8 29.Qg7 Re8+–) 28...c5 (28...Kd8 29.Bc4 Qb7 30.Nb3+–) 29.Qf7 (better is 29.Bc5 Kd8 30.Be7 Kc7 31.Rc1 Kb8 32.Bd6 Ka7+–) 29...Kd8 30.Bc5 (better is 30.Qg7 Re8 31.Bf6 cb4 32.Bf7+–) 30...Kc8?? (better is 30...Bc5 31.bc5 Rf7 32.Bf7 Qc5 33.Kh1 Qa3+/–) 31.Re7+– Kc7 32.Qg7 (32.Rd7 Qd7 33.Bb6 Kc6 34.Ba4 Kb7 35.Qd7 Kb8 36.Qc7 Ka8 37.Bc6) 32...Rhd8 33.Rc1 Re7 34.Be7 Kb6 (34...Kb8 35.Bd8 Qb7 36.Bc7 Ka7 37.Bd5 Qd5 38.Bb6 Kb6 39.Qc7 Kb5 40.Qa5) 35.Bd8 1–0. GuestTQVC – Andygoodwin, freechess.org, 2017.

4.a3 b6 5.Nf3 Bb7 6.Be2 Qd7 7.d3 0–0–0 8.0–0 Nce7 9.c4 Qc6 10.Nc3 Ba8 (10...Nf6 11.a4+/–) 11.b5 Qb7 12.a4 Nf6 13.a5 ba5 14.Ra5 Nf5? (better is 14...Kd7+–) 15.Qa4 Nh4 (15...Qb8+–) 16.Ra7 Nf3 17.Bf3 Qb8 (17...Qa7 18.Qa7 Bf3 19.gf3 Kd7+–) 18.Ra8 Qa8 19.Qa8 Kd7 20.Qc6 Kc8 21.b6 (21.Ra1 d5 22.Ra8) 21...Re8 (21...Ne8 22.Ra1 Nf6 23.Qc7) 22.Qc7 1–0. Fournier,Frederic (1650) – fornidoRock, Active, 2006.

4.a3 d5 5.b5+= Nce7 6.Be5 a6 7.ba6+/– ba6 8.d4 f6 9.Bg3 Nh6 10.Nf3 Nhf5 11.Bd3 c6 12.c4 g6 13.0–0 Ng3 14.hg3 Bg4 15.Nc3 h5 16.cd5 cd5 17.Qc2 Bf3 18.Bg6+– Ng6 19.Qg6 Ke7 20.gf3 Bh6 21.Qf5 (21.Qh5?! Bg5 22.Qg4 Qa5+–) 1–0. Wall,Bill – Clementoni, internet, 1996.

4.a3 Bf5 5.c4 a6 6.Nf3 Nf6 (6...e4 A) 7.b5 ab5 8.cb5 Nce7 (8...ef3 9.bc6 fg2 10.Bg2 b6 11.Nc3 Ne7 12.d3 Ng6=) 9.Nd4 Bg6 (9...d5 10.Be2 c5 11.bc6 bc6 12.Nf5 Nf5+=) 10.Be2 Nf5 (10...Nf6 11.0–0 d5 12.d3= Nf5=) 11.Qc2 Nf6 12.0–0 Nd4=; B) 7.Nd4 Nd4 8.Bd4 a5 9.d3 Nf6 10.b5 Bg4 11.Qc2 Bf5 12.Nc3 ed3+/–) 7.Nc3 (7.d4 ed4 (7...e4 8.d5 ef3 9.dc6 fg2 10.Bg2 b6 11.Nc3 Be7 12.0–0+=) 8.Nd4 Nd4 9.Bd4 c5= 10.Bb2 Be7 11.Bd3 Bd3 12.Qd3+=) 7...Be7 8.Rc1 (8.d4 ed4 9.Nd4 Nd4 10.Qd4 0–0 11.Be2 c5 12.Qf4=) 8...Ne4 (8...0–0 9.d4= e4 10.Qc2 Qe8 11.d5 Ne5 12.Ne5+=) 9.Nd5 (9.Ne4 Be4 10.b5 ab5 11.cb5 Nb8 12.d3=) 9...Na7 (9...0–0!?+= 10.d4 Bg4 11.h3 Bf3 12.gf3+=) 10.d4+/– c6 (10...ed4 11.Nd4 Bg6 12.Bd3+/–) 11.Ne7 Qe7 12.de5 de5 13.Ne5 Rd8 (13...f6!? 14.Qf3 g6+/–) 14.Qf3+– Bg6 15.Ng6 fg6 16.Qe2?? (better is 16.Bg7 Rg8 17.Bh6+–) 16...Rd2 17.Qd2 Nd2 18.Kd2 0–0 19.f3 (19.Ke1 c5 20.bc5 Qc5+=) 19...Rd8 20.Bd3 c5 21.bc5 Qc5 (21...Qg5 22.Rhg1+=) 22.Bd4 (22.Ke2!?=) 22...Qa3–/+ 23.Rc3 Qb2 (23...Qa2 24.Rc2 Qa5 25.Ke2–/+) 24.Rc2 (24.Bc2!? Qb4 25.Be4+=) 24...Qb4–/+ 25.Rc3 (25.Ke2 Nc6 26.Ba1 Qc5–/+) 25...Nc6–+ 26.Rb1 Qd6 27.c5 (27.Bb6!? Rd7 28.f4–+) 27...Qh2 28.Bc4 (28.Rb7 Qg2 29.Kc1 Nd4 30.ed4 Rd4–+) 28...Kf8 29.Rb7 Qg2 30.Kd3 (30.Kc1 Nd4 31.ed4 Rd4 32.Rf7 Ke8 33.Re3 Kd8 34.Rf8 Kc7 35.Rf7 Rd7 36.Rd7 Kd7 37.Ba6 Qg5 38.Bb5 Kd8–+) 30...Nd4 (30...Ne5! 31.Ke4 Qf3 32.Ke5 Qf5) 31.Rf7–+ Ke8 32.ed4 Qf1 33.Ke4 Qe1?? (better is 33...Qd1 34.Rd3 Qe2 35.Kf4 Qd3 36.Bd3 Kf7–+) 34.Re3+– Qe3 35.Ke3 a5 (35...Rd7 36.Rd7 Kd7 37.Ba6+–) 36.Rg7 a4 (36...Rc8 37.Rh7 Kd8 38.Ra7+–) 37.Rg8 (better is 37.Rh7 Rc8 38.Be6 Rb8+–) 37...Ke7 38.Rd8 Kd8 39.Kf4 (39.d5 g5 40.Kd4+–) 39...Ke7 (39...a3 40.Kg5 h5+–) 40.Ke5 Kd7 1–0. Johnston,Robert – Ruelas,E, Gaylord N MI op, 1993.

4.a3 Nf6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Nc6).

4.b5= Bd7?? 5.bc6+– Bc6 6.Nf3 Qf6 (6...Nf6 7.Nc3+–) 7.c4 0–0–0 8.Nc3 Ne7 9.d4 e4 (9...Bf3 10.gf3 Qh4 11.d5+–) 10.d5 (10.Nd2 d5+–) 10...Bd7 (10...ef3 11.dc6 Nc6 12.Qf3 Qf3 13.gf3+–) 11.Nd2 Nf5 12.Nde4 Qg6 13.Ng3 Ng3 14.hg3 Bg4 (14...Be7 15.Bd3 f5 16.Rb1+–) 15.Bd3 Qg5 (15...Bf5 16.Bf5 Qf5 17.Qd4+–) 16.f4 (better is 16.Ne4!? Qg6 17.Nd6 Rd6 18.Bg6 Bd1 19.Bf5 Kb8 20.Kd1 h6+–) 16...Bd1 17.fg5 Bg4 18.Bh7 Re8 (18...Be7 19.Ne4 Bf8 20.Kd2+–) 19.Bf5! Bf5 20.Rh8 g6 (20...Kd7 21.Kd2+–) 21.Kd2 b6 (21...Kd8 22.Rh7+–) 22.Rf1 Kb7 (22...Kd8 23.Nb5 Be7 24.Re8 Ke8 25.Nc7 Kd8 26.g4+–) 23.e4! Bd7 (23...Re4 24.Ne4) 24.Rh7 Be7 25.Rff7 Bg5 26.Kd3 c6 (26...Rd8+–) 27.Rd7 Ka6 (27...Ka8 28.Ra7 Kb8 29.Rhb7 Kc8 30.dc6 Re4 31.Ra8) 28.Ra7 1–0. Woelfelschneider,Peter – Kleiner, 2009.

4.Bb5 a6 5.Bc6= bc6 6.c4 (6.Ne2 Rb8 7.a3 c5=) 6...Rb8 (6...a5 7.ba5 Qg5 8.Qf3+=) 7.a3 a5 8.Bc3 ab4 (8...Qg5 9.Qf3 Ne7 10.h3+= (10.ba5? Bg4 11.Qe4 Bf5–+)) 9.ab4 Nf6 (9...Be6 10.d3=) 10.Nf3 (10.Ne2 Be6=) 10...Bg4 11.0–0 (11.h3 Bh5 12.d3 Be7=) 11...Ne4 (11...e4 12.h3 Bh5 13.g4 Ng4 14.Nd4+=) 12.h3= Nc3 (12...Bh5 13.Qa4 Qd7 14.Qd1=) 13.Nc3 Be6 (13...Bh5 14.b5=) 14.Qa4 Bd7 (14...Be7 15.Qc6 Bd7 16.Qe4+=) 15.d3 (15.d4 Qf6+=) 15...c5 (15...Be7 16.Ra3+=) 16.b5+/– Be7 17.Nd5 0–0 (17...f5 18.Qa7 Rc8 19.Qb7+/–) 18.Qa7 (18.Ne7?! Qe7 19.Rfb1 e4 20.de4 Qe4=) 18...Ra8?? (better is 18...Rc8+/–) 19.Qa8+– Qa8 20.Ne7 Kh8 21.Ra8 Ra8 22.Ng5 Be8 23.f4 Ra3 (23...h6 24.Ne4 ef4 25.Rf4 f6+–) 24.fe5 de5 (24...h6 25.Nf7 Bf7 26.Rf7 Rd3+–) 25.Rf7 1–0. Wall,Bill – Serpemanu, internet, 2004.

4.Bc4 Nb4 5.Qf3 Nc2–+ 6.Kd1 Na1?? 7.Qf7 1–0. Gregor123 – OwainGwynedd, mySchach.de, 2004.

4.d4 Nb4=+ 5.de5 c6 (Better is 5...Bf5!? 6.Na3 de5=+) 6.a3+= Nd5 7.Bc4 (Better is 7.c4!? Nb6 8.ed6+/–) 7...Be6 8.Nf3 (8.ed6 Ngf6 9.Nd2 Bd6 10.e4=) 8...Qa5 (8...Ne3 9.fe3 Bc4 10.ed6=+) 9.c3 (Better is 9.Qd2 Qd2 10.Nbd2 de5 11.Be5=) 9...Ne3! 10.fe3 Bc4 11.ed6 0–0–0 12.Kf2 Bd6 13.Nd4 Bc5?? 14.Qg4–/+ Kb8 15.Qg7 Ne7 16.Rd1 Nd5 17.Nd2=+ Nc3?? 18.Bc3+– Qc3 19.Rac1 Bd4 20.Rc3?? Bg7–+ 21.Rc4 Rhe8 22.Ke2–/+ Kc7 23.Nf3 Rd1–+ 24.Kd1 Rd8 25.Nd4? Bh6 26.Ke2–/+ Rd5 27.e4 Ra5 28.Nf5 Bf8 29.a4 a6 30.Ne3 Bc5 31.Ng4 Bg1 32.h3 f5 33.ef5 Rf5 34.Ne3?? Rf2 35.Kd3–/+ Ra2 36.Nd5 Kd6–+ 37.Nf6 Rg2 38.Nh7 Rg3 39.Ke2 Rh3 40.Ng5 Ra3 41.Nf3 Bc5 42.Nd4 Bd4 43.Rd4 Kc5 44.Rd7 b5 45.ab5 ab5 46.Kd2 b4 47.Kc2 Kc4 48.Rb7 c5 49.Kb2 Kd4 50.Rd7 Kc4 51.Rb7 Rd3 52.Ra7 b3 53.Ra4 Kb5 54.Re4 c4 55.Kc1 c3 56.Kb1 c2 57.Kb2–+ Rd2 58.Kb3?? c1Q 59.Re5 Kb6 60.Re4 Qc2 61.Kb4 Qe4 62.Kc3 Qd3 63.Kb4 Rc2 64.Ka4 Qc4 65.Ka3 Rc1 66.Kb2 Qc3 67.Ka2 –+. MasterofDisaster – ronx, Live Game Caissa's Web, 2004.

4.a3 a6

5.c4 Nf6 6.Nf3 Bg4 7.Be2 Be7 8.h3 Be6 9.0–0 e4 10.Nd4 Nd4 11.Bd4 Nd7 (11...c5!? 12.Bf6 Bf6=) 12.d3 Nf6 (12...ed3 13.Qd3 Bf6 14.Qe4+=) 13.Qc2 (13.de4 c5 14.Bb2 Ne4+/–) 13...d5 (13...ed3 14.Bd3 c5 15.Bb2+=) 14.cd5 Bd5 15.de4 Ne4 16.Bd3 (16.Bg7 Rg8 17.Bf3 Ng5 18.Bd5 Qd5+=) 16...f5 17.f3 (17.Bg7 Rg8 18.Be5 Nd2+=) 17...Ng3 18.Rf2 (18.Bg7?! Rg8 (worse is 18...Nf1 19.Bh8 Ne3 20.Qe2+=) 19.Bd4 Nf1 20.Bf1 Bf3+=) 18...Qd6 (18...0–0!?+=) 19.Nc3+/– 0–0?? (better is 19...Be6+/–) 20.Nd5+– Qd5 (20...Bd8+–) 21.Bc4 Qc4 22.Qc4 Kh8 (22...Rf7 23.Qc7 f4 24.Qb7+–) 23.Qc7 Bf6 24.Bf6 Rf6 25.Qg3 Raf8 1–0. Fournier,Frederic – alfido, Active (5/0), 2005.

5.Nf3 b5 6.c4 bc4 7.Bc4 Nf6 8.Qb3 (better is 8.Qc2 Bb7 9.Bb3+/–) 8...Be6? (better is 8...d5 9.Be2 Bd6=) 9.Be6+– fe6 10.Qe6 Qe7 11.Qb3 d5 12.Qc2 Rd8?? (better is 12...Qd6 13.d3 Be7+–) 13.Qc6 Kf7 (13...Qd7 14.Qa6 Bd6 15.Be5+–) 14.Ne5 Kg8 15.Qa6 Ne4 (15...Qd6 16.Nc6+–) 16.0–0 c5 (16...Qf6 17.Nc6 Qg6 18.f3+–) 17.Nc6 Qd6 (17...Qe6 18.f3 Nf6 19.Nc3+–) 18.bc5 (better is 18.f3 Nf6 19.bc5+–) 18...Qc5 (18...Nc5 19.Qb5 Rc8+–) 19.Nd8 Qc2 20.Qe6 1–0. GuestQVBQ – GuestLZGL, freechess.org, 2017.

5.Nf3 Bd7 6.Be2 Nce7 7.c4 Ng6 8.Nc3 Nf6 9.a4 (9.0–0 Qe7+=) 9...Be6 10.b5 a5 (10...ab5 11.ab5 Ra1 12.Qa1=) 11.0–0 b6 (11...Be7 12.d4+=) 12.d3 (12.Ng5 Bd7+=) 12...h6 (12...Be7 13.Ng5 Bf5 14.Bf3+=) 13.d4+/– e4 (13...Qd7!?+/–) 14.Nd2 Bf5 15.f3 Nh4 (15...ef3!? 16.Bf3 Ra7+/–) 16.fe4+– Bh7 17.g3 Ng6 18.Bf3 Rb8 19.e5! Nd7 (19...de5 20.Bc6 Pinning) 20.e6! fe6 21.Bc6 Be7? (better is 21...Ne7 22.Be4 Nf5+/–) 22.Qg4+– Ngf8?? (22...Bg5 23.Qe6 Qe7 24.Bd7 Kd8+–) 23.Qg7 Rg8 (23...Bf5 24.Qh8 Bg5+–) 24.Qf7 1–0. GuestBTYG – nemoss, freechess.org, 2017.

5.Nf3 e4 6.Nd4=.

5.Nf3 Bf5 6.d4 Be7 (6...Nf6 7.de5 de5 8.Qd8 Rd8 9.Ne5 Ne5 10.Be5 Bc2 11.Nd2+=) 7.Be2 (7.de5 de5 8.Ne5 Qd1 9.Kd1 Bf6=) 7...Bf6 8.0–0 Nh6 9.c4 d5?? (better is 9...ed4 10.Nd4 Nd4 11.Bd4 0–0+=) 10.de5+– (10.Ne5?! Be5 11.de5 dc4+/–) 10...Be7 11.cd5 Nb8 12.Nc3 (12.Nd4 Bg6+–) 12...0–0 13.Nd4 Qd7 (13...Bg6 14.Bh5+–) 14.Bc4 (14.e4 Bg6+–) 14...Bg6 15.Nce2 (15.Qf3 Qg4+–) 15...b5 (15...Be4 16.e6 Qd6 17.Ng3+–) 16.Bb3 Bg5 (16...a5 17.Nf4 ab4 18.Ng6 hg6 19.e6+–) 17.f4 Be7 18.Ng3 c6 (18...Bh4 19.e6 fe6+–) 19.f5 White prepares e6 19...Nf5 20.Ndf5 Bf5 (20...Qd8+–) 21.Nf5 g6 (21...Bg5 22.e6 Qa7+–) 22.Nh6 Kg7 23.e6 (23.e6 f6 24.ed7 Kh6 25.dc6+–) 1–0. Wiens,Paul – Mueller,K, RH–ch U20 Gau Algesheim, 1994.

5.Nf3 Bg4 6.Be2 f6 7.d3 Qd7 8.Nbd2 Be7 9.c4 g5 10.h3 Bf5 11.e4 Bg6 12.Nh2 h5 13.Qb3 Nd4 14.Bd4 ed4 15.Nhf3 Bf7 (better is 15...c5!?+=) 16.Nd4+/– b5 17.Nf5 0–0–0 18.Ne7 Qe7 19.a4 bc4 20.Nc4 d5 21.Na5?? (better is 21.Ne3 d4 22.Nc4+/–) 21...de4–+ 22.Qc3? (better is 22.Qb2 ed3 23.Nc6 Qe2 24.Qe2 de2 25.Nd8–+) 22...ed3 23.0–0 de2 24.Rfe1 Bd5 25.b5 (25.Rac1 Rd7–+) 25...Qe4 26.f3 Qe6 27.b6 (27.Rac1 Rh7 28.ba6–+) 27...Qb6 28.Kh1 g4 29.fg4 (29.Re2 gh3 30.gh3–+) 29...hg4 30.Nc4 Bg2! 31.Kg2 gh3 (better is 31...Qc6 32.Kf2 Rh3 33.Qh3 gh3–+) 32.Kh2?? (better is 32.Qh3 Rh3 33.Nb6 cb6 34.Rac1 Kb7 35.Kh3–+) 32...Qf2 33.Kh1 Qg2 0–1. Fournier,Frederic (1640) – rzaoar, Active, 2006.

4.a3 Be6

5.c4 Nf6 6.Nf3 Be7 7.Be2 0–0 8.0–0 a6 9.Nc3 e4 10.Nd4 (better is 10.Ng5!?+=) 10...Nd4= 11.ed4 c6 12.h3 d5 13.cd5 cd5 14.f3 ef3 15.Bf3 b5 16.Re1 Qd7 17.Re2 Bd6 18.Qb3 Bc7 19.a4 Bh3?? (better is 19...Rfe8–/+) 20.gh3+– Qh3 21.Bg2?? (better is 21.Nd5 Nd5 22.Bd5 Qb3 23.Bb3+–) 21...Qh2+= 22.Kf1 Nh5 23.Bd5?? (better is 23.Re3 Ng3 24.Kf2+=) 23...Ng3 0–1. Neumann,Frank – Pons,Francisco, OP–2011–0–01717, 2011.

5.Nf3 Be7 6.c4 Bg4 7.h3 Bh5 8.Be2 f5? (better is 8...Nf6=) 9.Ne5+– Be2 10.Nc6 bc6 11.Qe2 Nf6 12.Qf3 Qd7 13.b5! Rb8 (13...cb5 14.Qb7 Double attack (14.Qa8 Pinning; 14.Qa8 Deflection; 14.Qb7 Decoy)) 14.Nc3 0–0 15.Rb1 Ne4 (15...cb5 16.cb5 d5 17.a4+/–) 16.Ne4 fe4 17.Qe4 cb5 18.0–0 bc4 19.Qc4 d5 20.Qc2 Rb7 21.Bd4 Rfb8 22.Ba7! Rb1 (22...Ra7 23.Rb8 Pinning (23.Rb8 Deflection; 23.Rb8 Overloading)) 23.Rb1 Rb1 24.Qb1 Ba3 25.Qb7 Be7 26.Bd4 Kf7 27.f4 Kg8 28.g4 Kf7 29.Be5 Bd8 30.d4 Kf8 31.Kg2 g6 32.Kf3 Qa4 33.Qb1 (33.Bc7?! Qd1 34.Kg2 Qe2 35.Kh1 Qe1 36.Kg2 Qe2 37.Kh1 Qe1 38.Kg2 Qe2=) 33...Qd7 34.f5 gf5 35.Qf5 Qf5 36.gf5 Kf7 37.Bg3 c6 38.e4 de4 39.Ke4 Bf6 40.Be5 Bh4 41.Kd3 h5 42.Kc4 Be7 43.Kb3 Bd8 44.Kb4 Bb6 45.Kc4 ½–½. Ravasz,Laszlo Jr – Kalyinka,Roland (2020), HUN–chT2 Maroczy, 2003.

5.Nf3 Be7 6.Be2 Nf6 7.c4 0–0 8.0–0 Re8 9.d3 Nd7 10.Nbd2 f6 11.Qc2 Bf7 12.Rac1 a6 13.e4 Nb6 14.d4 ed4 15.Nd4 Nd4 16.Bd4 Nd7 17.Bd3 Ne5 18.Be2 Qd7 19.Nf3 Nc6 20.Bb2 Qe6 21.Bd3 Ne5 22.Ne5 de5 23.c5 Red8 24.Rcd1 Qb3 25.f4 Qc2 26.Bc2 ef4 27.Rf4 Rd1 28.Bd1 Rd8 29.Rf1 Rd2 30.Bc1 Ra2 31.Bf3 c6 32.Rd1 Rc2 33.Kf1 Kf8 34.Ke1 Be8 35.Bd2 Bf7 36.Rc1 Ra2 37.Rc3 g6 38.Be2 f5 39.ef5 gf5 40.Bh6 Ke8 41.Bf4 Bf6 42.Re3 Kd7 43.Bf3 Bb2+= 44.Re2 Bc3 45.Kf2 Ra3–+ 46.Bd2 Bd4 47.Kg3–/+ Be6 48.h4 Ra2 49.Be1 Re2 50.Be2 1–0. Fournier,Frederic (1675) – martss (1930), Active (5/0), 2004.

4.a3 g6

5.b5 Nb8+= 6.d4 (6.Nf3 Bg7 7.Be2 Nf6 8.0–0 a6 9.a4=; 6.Be2 Bg7 7.Nf3 a6 8.0–0 ab5 9.d4=) 6...e4 7.d5 Nf6 8.Nc3 Rg8 9.Nge2=.

5.c4 Bf5 6.Be2 Bg7 7.d4 Nh6 8.d5 Ne7 9.Nc3+=.

5.c4 Nf6 6.d3 (6.Nf3 Bg7 7.Be2 e4 8.Nd4 Ne5 9.0–0=; 6.Be2 Bg7 7.d4 e4 8.Nc3 0–0 9.b5=; 6.b5 Ne7 7.f4 Bg7 8.fe5 Nd7 9.ed6=) 6...Bg7 7.Nf3 0–0 8.Be2 Ne7 9.d4=.

5.c4 Bg7 6.b5 Nce7 7.Nf3 Nf6 8.Be2 Bg4 9.0–0 0–0 10.Bd3?? (10.d4 Bf3 11.Bf3 e4+=) 10...Qd7?? (better is 10...e4 11.Be4 Ne4 12.Bg7 Kg7–+) 11.Be2 a6 12.a4 ab5 13.ab5 Ra1 14.Ba1 Ra8 15.Nc3 Nf5 16.d3 c6 17.h3 Bf3 18.Bf3 d5 19.bc6 bc6 20.Qb3 d4 21.e4? (better is 21.Na4=) 21...Nh4–+ (21...dc3 22.ef5 Qd3 23.fg6 hg6 A) 24.Qc3?! Qc3 25.Bc3 e4 26.Bf6 ef3 (worse is 26...Bf6 27.Be4 Ra4 28.Rc1+=) 27.Bg7 Kg7=; B) 24.Rd1+/–) 22.Be2 g5 (22...dc3 23.Bc3 Nh5 24.Bh5 gh5 25.Bd2–+) 23.g3? (better is 23.Na4!?=) 23...Ng6 24.Na4 Qh3 25.Nc5 Ng4 (25...Bf8 26.Qb4–+) 26.Bg4–/+ Qg4 27.Qd1 (27.Qb7 Qc8–/+) 27...Qh3 28.Qf3?? (28.Qb3 Bf8 29.Qb4 Nf4 30.gf4 gf4–+) 28...Re8 (better is 28...Nh4 29.Qh1 Qf1 30.Kf1 Ra1 31.Ke2 Rh1 32.gh4 gh4–+) 29.Qg2 Qg4 30.f3 Qc8 31.Rb1 h6 32.Qb2 Kh7 33.Qb7? (33.Kg2 Bf8 34.Nb3 Qe6–/+) 33...Qb7?? (better is 33...Qh3 34.Kf2 Qh2 35.Ke1 Qg3 36.Kd1 Nf4–+) 34.Rb7–/+ Re7 0–1. GuestLXMK – GuestPGLX, freechess.org, 2017.

5.c4 Bg7= 6.d3 Nf6 7.Nf3 0–0 8.Be2 e4 9.Nd4=.

5.c4 Bg7= 6.d4 ed4 7.ed4 (7.Nf3 Nge7 8.ed4 d5 9.c5=) 7...Nge7 (7...Qe7 8.Ne2= Nf6 9.Nbc3+=) 8.Nf3 0–0 (8...d5 9.c5=) 9.Be2 Re8 10.0–0 a6 11.Nbd2 d5 12.cd5 (12.Ne5!?=) 12...Nd5+= 13.Bc4 Nb6 14.Qb3 Nc4 15.Nc4 Be6 (worse is 15...Bd4 16.Rad1 Bg4 A) worse is 17.Nd4 Bd1 18.Qd1 Nd4–+; B) 17.Bd4?! Bf3 18.Qf3 Nd4 19.Qb7 Qc8 20.Qc8 Ne2 (20...Rac8?? 21.Rd4 c5 22.Rd5+–) 21.Kh1 Rac8+=; C) 17.Rd4 Nd4 18.Nd4+/–) 16.Qd3 Bf5 17.Qd2 (17.Qc3 Ne7+=) 17...Qd7 (17...Be4 18.Qf4+=) 18.Ne3 (18.Rfd1 Be4 19.d5 Bf3 20.gf3 Ne5+=) 18...Be4–/+ 19.Ng5 h6 (19...Nd4!? 20.Rad1 Rad8 21.Bd4 Bd4 (worse is 21...Qd4 22.Qa2 Bd3 23.Nf7+–) 22.Ne4 Re4–/+) 20.Ne4+= Re4 21.d5 Bb2 22.Qb2 Na7 23.Rad1 Qd6 (23...Nb5 24.d6 c6 25.Rd3=) 24.Rfe1 Rae8 25.Rd3 (25.Qc1 Nb5=) 25...Qb6 26.h3 f5 (26...Nb5 27.Rc1=) 27.Red1 (better is 27.Rf1 Rf8 28.Qb3+=) 27...Nc8?? (better is 27...Qd6=) 28.Nf5!+– gf5 (28...gf5 29.Rg3) 29.Rg3 Rg4 30.hg4 f4 31.Rf3 Rf8 (31...Qd6 32.Rh3 Qg6 33.Qd4+–) 32.Qe5 1–0. Havinga,J – Van Splunter,Arjen, NED–ch U14 Nijmegen, 2001.

5.c4 Bg7= 6.Be2 Nf6 7.Nf3 e4 8.Nd4 Ne5 9.0–0=.

5.c4 Bg7= 6.Nf3 Nf6 7.d4 e4 8.d5 Nb4 9.ab4=.

4.b5 Na5

5.Nc3 Nf6= 6.Nf3 Bg4 =.

5.Nc3 Nf6= 6.h3 (6.Nf3 Bg4=) 6...Be7 7.Nge2 (7.Nf3 e4 8.Nd4 0–0+=) 7...b6 (7...Nc4!? 8.Bc1 d5–/+) 8.Ng3= c6 9.a4 (9.Qf3 Bd7=) 9...cb5 (9...0–0 10.Be2+=) 10.ab5 Nb7 11.Be2 0–0 12.0–0 Re8 13.f4 ef4 14.Rf4 Nc5 15.Nce4 (15.Bf3 d5 16.Nf5 Bf5 17.Rf5 Qd7+/–) 15...Nd5 16.Rf3 Ne4 17.Ne4 Nc7 18.Qf1 Rf8 19.Rg3 f6 20.c4 (20.Nc3 Be6+/–) 20...a5 21.Nc3 Rb8 22.d4 Ne6 23.Bd3 Ng5 (23...f5 24.Rf3 g6 25.Nd5+/–) 24.d5 (24.e4 Be6+/–) 24...Nf7 (24...f5 25.Qf4+=) 25.Qf4 (25.Qb1 f5 26.Bf5 Ne5 27.Bh7 Kh8+–) 25...Kh8 26.Ne4 Ne5 27.Be2 g5 28.Qf1 Bd7 (28...f5 29.Nd2+=) 29.Nd2 f5 30.Qd1 (30.Nf3 Bf6 31.Ne5 de5+=) 30...Bf6 31.Qc2 (31.Bd4 Rc8+=) 31...f4 (31...Qc8 32.Ra2=) 32.ef4+= gf4 33.Rb3 Kg8 34.Rf1 Bh4 35.Nf3 Nf3 (35...Bf6!?+/–) 36.Rbf3+– (worse is 36.Bf3 Rc8+=) 36...Qg5 37.Bd3 Bf5 38.Qc3 (better is 38.Bf5 Qf5 39.Qf5 Rf5 40.Rf4 Rf4 41.Rf4+–) 38...Rf6?? (better is 38...Bd3 39.Qd3 Rbc8+–) 39.Rf4 (better is 39.Bf5 Qf5 40.Rf4+–) 39...Bd3 40.Rg4?? (better is 40.Rf6 Bf1 41.Rf1+– (41.Kf1?? Qf6 42.Qf6 Bf6 43.Bf6 Rf8–+)) 40...Qg4–+ (40...Bf1?? 41.Qf6 Qg4 42.Qh8 (42.hg4?? Bf6 43.Bf6 Bc4–+) 42...Kf7 43.Qh7 (43.hg4 Rh8 44.Bh8 Bc4–+) 43...Ke8 44.hg4 Bc4 45.Qh8 Kd7 46.Qb8 Bd5 47.Qa7 Ke8 48.Qc7+–; 40...Rf1?! 41.Kh2 Qg4 42.hg4=) 41.hg4 Rf1?? (better is 41...Bf1 42.g3 Bg5–/+) 42.Kh2= Kf7?? (42...Rf6 43.Kh3 Bg5–+) 43.Qd3+– (43.Qd3 Rf4 44.Qh7 Ke8 45.Qh8 Rf8 46.Qh4+–) 1–0. Otte,Marco – Boshoven,Albert, Wag.Intcomp, 1996.

5.c4 a6 6.a4 (6.d4 ab5 7.cb5 e4=) 6...c6 (6...Be6 7.Na3+=) 7.d4= ed4 8.Qd4 (8.Bd4 Ne7=) 8...cb5 (8...Nb3 9.Qe4 Be6 10.bc6 Na1 11.cb7+=) 9.Qe4 Ne7 (better is 9...Be6 10.cb5 d5+=) 10.Nc3? (better is 10.ab5 Bf5 11.Qf3=) 10...Bf5 (10...bc4 11.Rd1–+) 11.Qf4–/+ bc4 12.Bc4 (12.Rd1 Qb6 13.Rd2 Be6 14.Qd6 Nec6–+) 12...Nc4 (better is 12...Qb6!? 13.Nd1 Qb4 14.Bc3 Qc4–+) 13.Qc4–/+ Rc8 14.Qf4?? (better is 14.Qe2–/+) 14...Qb6–+ 15.Nd1 Qa5 16.Ke2 Rc2 17.Kf3 Ng6 18.Qd4 Ne5 19.Kf4 (19.Kg3 Rc4–+) 19...Rc4 0–1. mtr – OAnimal31, internet, 2001.

5.c4 a6 6.d4 =.

5.c4 c5 6.Nc3 Be6 7.d3 Nf6 8.Nf3 Be7 9.Be2 0–0 10.0–0 b6 11.Ng5 Bd7 12.Nge4 Bf5 13.Nf6 Bf6 14.Nd5 Be6 15.d4 1–0. vhilts (2505) – attasantotjia (2510), net–chess.com, 2013.

5.c4 c5 6.d3 Be7 7.Nf3 Bf6 (7...Nf6 8.Be2=) 8.Nbd2 Ne7 (8...a6 9.ba6 Ra6 10.Be2=) 9.Ne4 Ng6 10.Nf6 Qf6 11.Be2 (11.Bc3 b6+=) 11...Qe7 (11...a6 12.a4=) 12.0–0 (12.Bc3 b6+/–) 12...b6 (12...a6 13.a4+=) 13.Qc2 Bf5 14.Nd2 0–0 15.Bf3 Nh4? (15...Nb7 16.Bc6+=) 16.Bd5 (better is 16.Ba8!? Ra8 17.Kh1+–) 16...Rab8 17.g3 Ng6 18.f4 Bh3 (18...ef4 19.Rae1 fe3 20.Rf5+=) 19.Rf2+/– Kh8? (19...Qd7 20.fe5 de5 21.Nf3+/–) 20.Nf3?? (better is 20.f5+–) 20...ef4 21.ef4 f6 (21...Be6 22.Re1 Qd7 23.Qc3+/–) 22.Re1 Qd7 23.Bc3 (23.Rfe2 Rbe8+/–) 23...Nb7 (23...Ne7!? 24.Be4 f5+=) 24.Rfe2+/– Nd8 25.d4 Bg4 26.dc5 bc5 (26...dc5 27.Be4+/–) 27.Re3 Nf7 28.Qb2 Nh6 29.Be6 (better is 29.Qd2+/–) 29...Qe6?? (better is 29...Be6 30.Re6 d5+=) 30.Re6+– Bf3 31.Rd6 Nf5 32.Rd7 Ra8 (32...a6 33.a4+–) 33.Rc7 h6 (33...Bg4 34.Rc5 a6 35.b6+–) 34.b6 (better is 34.Rc5 Bg4+–) 34...ab6 35.Qb6 Ra2 36.Qc5 Rg2 (36...Bg4+–) 37.Kf1 Rh2 (37...Nge7 38.Ree7 Ne7 39.Qe7 Rg8 40.Bf6 Kh7 41.Bg7 Be2 42.Kg2 Bf3 43.Kf3 Re8 44.Qe8 h5 45.Qh5 Kg8 46.Qh8) 38.Qg1 (better is 38.Qf5 Nf4 39.gf4 Bg2 40.Kg1+–) 38...Rh1 (38...Rc2 39.Bf6 Rf6 40.Rc8 Kh7 41.Rce8–+) 39.Kf2 (39.Qh1! Bh1 40.Kf2=) 39...Rg1+= 40.Rg1 Bg4 41.c5 Nge7 42.Re7? (better is 42.Rc1–/+) 42...Ne7–+ 43.Ra1 (43.Re1 Nf5 44.Rc1 Re8–+) 43...Nd5 (43...Rc8 44.Ra5–+) 44.Bb2 (44.Bd4 Re8 45.Ra2 Kg8–+) 44...Rc8 45.Bd4 (45.Ba3 Re8 46.Re1 Ra8–+) 45...h5 (45...Nb4 46.Rb1 Nd3 47.Ke3 Nc5 48.Bc5 Rc5 49.Kd4–+) 46.Ra7 (46.Rb1 Rd8 47.Rc1 Nf4 48.gf4 Rd4–+) 46...Nc7 (46...Nb4 47.Rb7 Nc2 48.Be3–+) 47.c6 (47.Be3–+) 47...Nb5 48.Rb7 (48.Ra4–+) 48...Nd4 0–1. GuestQJCG – GuestTBDS, freechess.org, 2017.

5.c4 c5 6.d4 Be6 7.Qa4 cd4 8.ed4 ed4 9.Bd4 Nf6=.

5.c4 c6 6.a4 (6.Bc3 cb5 7.cb5 Nf6=) 6...Be6 7.Qc2 Rc8 8.d3 cb5 (8...Nf6!?+=) 9.ab5= b6 10.Nd2 Nf6 11.Ngf3 Be7 12.Be2 0–0 13.0–0 e4 (better is 13...Qc7!?+=) 14.de4+– Bc4? (better is 14...Nd7+–) 15.Nc4 (15.Bc4 a6 16.Ra5 ba5 17.ba6 d5 18.ed5 Nd5+–) 15...Qc7 (15...d5 16.ed5 Qd5 17.Rfd1 Qb5 18.Ra4+–) 16.Rfc1 Ne4 (16...Qb7 17.Nd4+–) 17.Qe4 (17.Qe4 Nb3 18.Bd3+–) 1–0. GuestMXYX – GuestVFSF, freechess.org, 2017.

5.c4 Nf6 6.Bc3 b6 7.d4 Bf5 8.Nd2 Be7 9.de5 de5 10.Ngf3 0–0 11.Ne5 Qc8 12.Qf3 Rb8 (12...a6 13.Be2+/–) 13.Rd1 Bd6 14.Bd3 Nb7?? (better is 14...Be6+–) 15.Bf5 Qd8 (15...Qe8 16.Nc6 Ra8 17.Bf6+–) 16.Nc6 Qe8 17.Bf6 Ra8 18.Bh7! Kh7 19.Qh5 Kg8 20.Qg4 Nd8 (20...g6 21.Qh3 Qe3 22.fe3 Bg3 23.hg3 Rfe8 24.Qh8) 21.Qg7 1–0. marekt – aliwood, internet, 2005.

5.c4 Nf6 6.Be2 Be7 7.Qa4 (7.Bc3 A) 7...b6 8.Ba5 (8.Nf3 0–0 9.0–0 Bf5 10.Ba5 ba5 11.Nc3 Qc8 12.Qb3 c5 13.bc6) 8...ba5 9.Nf3 0–0 10.Nc3 Bf5 11.0–0 h6 12.d4 e4 13.Nd2; B) 7...c5= 8.Qa4 (8.Nf3 e4 9.Qa4 b6 10.Ng5 h6 11.Nh3 0–0 12.Ba5 Bh3 13.gh3; 8.d3 0–0 9.Nd2 a6 10.a4 Bf5 11.Ngf3 Qc7 12.0–0 h6 13.Qc2; 8.Na3 Ne4 9.Bb2 0–0 10.Nf3 Bf5 11.d3 Ng5 12.0–0 Qc7 13.Qd2) 8...b6 9.Ba5 ba5 10.Nc3 0–0 11.Bf3 Rb8 12.Nge2 Bf5 13.Ng3) 7...b6 (7...c5 8.Nc3 0–0 9.Nf3 a6 10.0–0 ab5 11.cb5 h6 12.Qc2 Be6 13.d3) 8.Nf3 (8.d4 e4= (8...ed4 9.Bd4 0–0 10.Nf3 Bd7 11.0–0 c5 12.Bb2 a6 13.Nc3) 9.Nd2 0–0 10.Nh3 a6 11.0–0 ab5 12.cb5 Bh3 13.gh3; 8.Nc3 0–0 9.Nf3 a6 10.Qc2 ab5 11.cb5 c5 12.bc6 Nc6 13.0–0) 8...Bd7 (8...e4 9.Nd4= 0–0 10.Nc3 a6 11.0–0 Qd7 12.Qc2 Bb7 13.a4; 8...0–0 9.Nc3 a6 10.0–0 h6 11.Qc2 Be6 12.Ne4 Qd7 13.Nf6) 9.Nc3 (9.0–0 a6= (9...0–0 10.Qc2 a6 11.Nc3 ab5 12.cb5 c5 13.bc6) 10.Nc3 0–0 11.Qc2 ab5 12.cb5 c5 13.bc6) 9...c6 (9...a6 10.0–0= 0–0 11.h3 h6 12.Qc2 ab5 13.cb5) 10.0–0 (10.d4 e4 (10...Qc7 11.0–0 0–0 12.Qc2 a6 13.ba6) 11.Nd2 d5= (11...cb5 12.cb5 d5 13.f3) 12.cd5 cd5 13.f3) 10...cb5 (10...a6 11.ba6 (11.bc6 Nc6 12.Qc2 h6 13.Nd5) 11...Ra6 12.d4= ed4 13.Nd4; 10...0–0 11.h3 Qc7 12.Ba3 Rfe8 13.d4) 11.cb5 (11.Nb5? a6–+) 11...a6 (11...0–0 12.Bd3 a6 13.Rfc1) 12.Rac1 (12.e4 ab5 (12...0–0 13.d4) 13.Bb5 Nc6=; 12.d4 ab5 13.Bb5) 12...ab5 (12...0–0 13.h3+= (13.Qc2=)) 13.Bb5 Nb7 (13...Nc6 14.Qc2=) 14.Bd7+= Nd7 15.Qc4 (15.Qc2 0–0+=) 15...Rc8 (15...Qc8 16.Qe2 0–0 17.d4+=) 16.Qb5 0–0 17.d4 ed4 18.Nd4 Rc5 19.Qe2 Na5 (19...Bf6!?+=) 20.Ba3+/– Rc8 (20...Rg5 21.f4 Rg6 22.Nd5+–) 21.Nd5+– Nf6?? (better is 21...Bf6+–) 22.Rc8 Qc8 (22...Nd5 23.Rd8 Rd8+–) 23.Ne7 Kh8 24.Nc8 Rc8 25.Qa6 Re8 26.Bd6 1–0. pierre – vetva, internet, 2011.

5.c4 Nh6 6.Qa4 b6 7.d4 (7.d4 ed4 8.ed4=). color1972 – Ridgereeno, ChessWorld.net, 2005.

5.d3 Be7 6.c4 (6.Bc3 c5=) 6...Nf6 (6...a6 7.ba6 Ra6 8.d4 ed4 9.Bd4+=) 7.a3 (7.Bc3 c5=) 7...0–0 8.Nd2 (8.Bc3 b6=) 8...h6 (8...a6 9.d4 ab5 10.de5 de5 11.cb5+=) 9.Ngf3 (9.Bc3 b6=) 9...Bg4 (9...a6 10.Qc2=) 10.Be2 Bf3 (10...a6 11.a4=) 11.Bf3+= a6 12.Nb3 (12.Bc3 ab5 13.cb5 c6+=) 12...Nb3 (12...ab5 13.Na5 Ra5 14.Bc3=) 13.Qb3+= c5? (better is 13...ab5!? 14.cb5 c6+=) 14.Bb7+– Ra7 (14...ab5 15.Ba8 Qa8 16.0–0 (16.Qb5 Rb8–+) 16...bc4 17.dc4+–) 15.Ba6 (15.ba6 Qc7+–) 15...Qb8 (15...Nd7 16.0–0+–) 16.Qa4 (16.Qc3+–) 16...Qb6 (better is 16...Ne8!?+–) 17.Bc3 g5 (17...e4 18.de4 Ne4 19.Ba5 Ra6 20.ba6 (20.Bb6 Ra4 21.f3 Nc3–+) 20...Qa6 21.Qb5+–) 18.0–0 1–0. jaddwarrior (2015) – Lavender2bay (2165), ChessWorld.net, 2017.

5.d4 ed4 6.Qd4 c5 7.Qa4 +=.

5.d4 ed4 6.Qd4 c6 +=.

5.d4+= ed4 6.Qd4 Nf6 7.Nf3 Be7 8.Bd3 0–0 9.Qh4 Bd7?? (better is 9...h6+=) 10.Bf6+– Bf6 (10...h6 11.Be7 Qc8 12.Bf8 Qf8+–) 11.Qh7 1–0. marekt – Geordiedazza, ChessWorld.net, 2003.

5.d4 Be7 6.Qd2+/– b6 7.Nf3 Bf6?? 8.Bc3 Nb7 9.de5+/– de5 10.Qd8 Bd8 11.Be5+– f6 12.Bd4 a5 13.Be2 c5 14.Bb2 Ne7 15.0–0 0–0 16.Rd1 Bf5 17.Nc3 Bc2 18.Rd2 Bg6 19.Nd5 h6?? 20.Ne7+– Be7 21.Rad1?? Rfd8?? 22.a4 Nd6= 23.Nh4 Bc2?? 24.Rc2+– Ne4 25.Rd8 Rd8 26.Nf5 (26.Nf5 Kf8 27.h4+–) 1–0. makaveli1982 – jakj, internet friendly, 2007.

5.d4 Nf6? 6.de5+/– de5 7.Qd8 Kd8 8.Be5 Be6 9.Nf3 Nc4 10.Bd4 (10.Bf6 gf6 11.Nc3 a6+/–) 10...c5 (10...Ne4!?+/–) 11.bc6+– bc6 12.Bc4 Bc4 13.Ne5 Kc8?? (better is 13...Bd5 14.c4 Be6 15.Nc6 Kc7+–) 14.Nc4 Bb4 (14...Be7 15.Nbd2+–) 15.Ke2 (15.c3 Be7+–) 15...Ne4 (15...Be7 16.Rd1+–) 16.Bg7 Rd8 (16...Rg8 17.Bd4+–) 17.a3 Bc3 (17...Be7+–) 18.Nc3 Nc3 (18...Rg8 19.Ne4 Rg7 20.Rab1+–) 19.Bc3 Rb8 (19...Kd7 20.Ne5 Ke8 21.Rhb1+–) 20.Ne5 Rb5 (20...Rg8 21.Nf7 Rb6 22.Nd6 Kd7 23.Rad1+–) 21.Nf7 Rdd5 22.Rhd1 (22.e4 Rd7 23.Ne5 Rg7+–) 22...Rd1 (22...Rbc5 23.Rd3+–) 23.Rd1 Rc5 24.Nd6 Kb8 25.Rb1 (25.Rb1 Kc7 26.Ne4+–; 25.Ne4!? Rh5+–) 1–0. Woelfelschneider,Peter – Weinsanto, 2008.

5.d4 h5 6.Bc3 Bg4? 7.f3+– Bf5 8.Ba5 b6 9.Bc3 Nf6 10.de5 de5 11.Qd8 Kd8 12.e4 Be6 13.Be5 Bb4 14.Nc3 g6 15.Bf6 (15.Bf6 Kd7 16.0–0–0 Bd6 17.Bh8 Rh8 18.e5+–) 1–0. guest895 – guest495, ICC, 2003.

5.Nf3 Bd7 6.Be2 Nf6 7.c4 c6 8.bc6 Bc6 9.d3 e4 10.de4 Be4 11.Nbd2 d5 12.cd5 Bd5 13.0–0 Be7 14.Qa4 Nc6 15.Bc4 0–0 16.Bd5 Qd5 17.Rfd1 Qf5 18.Rac1 a6 19.Nf1 b5 20.Qb3 Rac8 21.Ng3 Na5?? (better is 21...Qg4=) 22.Nf5+– Nb3 (22...Rc1 23.Ne7 Kh8+–) 23.Ne7 Kh8 24.Rc8 Rc8 25.Nc8 g6 26.ab3 (26.ab3 Kg7 27.Rd6 g5 28.Bf6 Kg6 29.g4 h5 30.Ne7 Kh6 31.Rd8 hg4 32.Rh8; 26.Bf6 Kg8 27.Rd8) 1–0. Fournier,Frederic – fiflo, Active, 2008.

5.Nf3 Be6 6.d3 (6.d4 e4 7.d5 Bg4+=) 6...c5 (6...c6 7.c4=) 7.c4 Be7 8.Be2 Nh6 9.0–0 0–0 10.Qc2 b6 11.Nbd2 Bc8 12.Nb3 (12.d4 ed4 13.ed4 d5+/–) 12...Nb3+= 13.Qb3 Bb7 14.Nd2 f5 15.Bf3 Qd7 16.Rfd1 Qc7 17.a4 Ng4 18.a5 Nf6 Black plans e4 (18...Bh4 19.Rf1+=) 19.a6 Bf3 20.Nf3 Rad8 21.d4 e4 22.Ng5 Qc8 23.d5 Rd7 (23...Nd5 24.Nh7 (worse is 24.cd5 Bg5 25.Ra4 Rde8+=) 24...Kh7 25.Rd5+/–) 24.Ne6 Rf7 25.Rf1 Ne8 26.f3 Bf6 27.fe4 Bb2 28.Qb2 fe4 29.Qc2 Nf6 30.h3 Rde7 31.Rf2 h6 32.Raf1 Qd7 33.g4 (33.Rf6 gf6 34.Qe4 f5 35.Rf5 Rf5 36.Qf5 Qe8+–) 33...Nh7? (better is 33...Re6!? 34.de6 Qe6+/–) 34.Rf7 Rf7 35.Rf7 Qf7 36.Qe4 Qf6 37.Qf4 Qf4? (better is 37...Qc3+/–) 38.ef4+– (worse is 38.Nf4 Ng5 39.Kf2 Kf7+–) 38...Nf8 (38...g5+–) 39.Nd8 Ng6 40.Nc6 Nf4 41.Na7 1–0. Khakimzianov,Rinat – Svalyk,Gennadiy, Ufa Cup, 2007.

5.Nf3 Bg4 6.Be2 Nc4?? 7.Bc4+– a6 8.a4 e4 9.h3 Bh5 10.g4 Bg6 11.Nd4 c5 12.Ne2 d5 13.Bb3 Qf6?? 14.Bf6 gf6 15.0–0 c4 16.Ba2 f5 17.Nf4 ab5 18.ab5 b6 19.Nd5 Nf6 20.Nf6 Ke7 21.Nd5 Ke6 22.Nb6 Rb8 23.Bc4 Ke7 24.Ra7 Kf6 25.Nd7 Kg5 26.Nb8 Bd6 27.Nc6 h5 28.gf5 Bf5 29.f4 Kh4 30.Qe1 Kh3 31.Bf7 Bg6 32.Be6 Bf5 33.Bf5 1–0. pumpkin (2270) – biffhunt (1680), net–chess.com, 2006.

5.Nf3 h6 6.c4 e4 7.Nd4 Qf6 (7...a6!?=) 8.Qc2 d5? (better is 8...Qh4+/–) 9.Nc6+– bc6 (9...Qg6 10.Na5 Nf6+–) 10.Bf6 (10.Bf6 Nf6 11.cd5 Nd5 12.Nc3+–) 1–0. GuestBTYG – GuestLCWG, freechess.org, 2017.

5.c4 b6

6.Nc3 Nf6 7.Nf3 Be7 8.Qc2 0–0 9.d4 ed4 10.Nd4 Bb7 11.f3 a6= 12.Bd3 ab5 13.cb5 g6 14.0–0 Nd5 15.Nd5+/– Bd5 16.a4 Qd7 17.Be4 Be4+= 18.Qe4 Bf6 19.Rab1 Nc4–/+ 20.Bc3 Ra4 21.Rfd1 Bd4 22.Bd4 Na3–/+ 23.Rbc1 Nb5–+ 24.Qd3 Nd4 25.ed4 Rfa8 26.Qc3 R8a7 27.d5 R4a5 28.Rd2 Qe7 29.h3?? Rc5 30.Qb2 Qe3 31.Kh2 Rc1 32.Qc1 Qf4 33.g3 Qf3 34.Qb2 Ra3 35.Re2 Qg3 36.Kh1 Qh3 37.Kg1 Qg4 38.Kf1 Qf3 39.Ke1 Qc3 40.Qc3 Rc3 41.Re7 f5 42.Kd2 Rc5 43.Ke3 b5 44.Kf4 b4 45.Kg5 Rd5 46.Kh6 f4 47.Rg7 Kf8 48.Rg8 Ke7 49.Kh7 Kf6 50.Rg6 Kf5 51.Kh6 b3 52.Rg2 Ke4 53.Kg6 f3 (53...f3 54.Rf2 c5–+) 0–1. wlittle (2330) – rsilva (2150), net–chess.com, 2004.

6.d4 e4+=.

6.Qf3 Bb7= 7.e4 Nf6 8.d3 (8.Nc3 a6=) 8...Be7 (8...a6 9.Nc3=) 9.Qd1 (9.Nd2 a6=) 9...0–0 (9...c6 10.Nf3+=) 10.Nf3 c5 (10...a6 11.Be2+=) 11.Be2= h6 (11...Nd7 12.0–0=) 12.Nbd2 (12.0–0 a6=) 12...Bc8 (12...a6 13.ba6 Ra6 14.0–0=) 13.Nb3 Nb3 14.ab3 a5 15.0–0 (15.ba6 Ra6 16.Ra6 Ba6=) 15...Nh7 (15...Nd7 16.Re1=) 16.Qc2 (16.Ne1 Bg5=) 16...Ng5 17.h3 (17.Nd2 Ne6=) 17...Be6 (17...Nf3 18.Bf3 Bg5 19.Qe2=) 18.Nh2 (18.Nd2 f5=) 18...Qd7 (18...f5 19.ef5 Rf5 20.Rfe1=) 19.Bg4 (19.Qc3 f6+=) 19...f5 20.ef5 Bf5 21.Bf5 (21.f4 Bg4 22.fg5 Bf5 23.gh6 gh6+=) 21...Rf5 (21...Qf5 22.Rfe1+=) 22.Qe2 (22.Ng4 Ne6=) 22...Raf8 23.g4?? (better is 23.Ng4+=) 23...Nh3–+ 24.Kg2 (24.Kh1 Rf2 25.Rf2 Rf2–+) 24...Nf4 (24...Nf4 25.Kh1 Ne2 26.gf5 Rf5–+) 0–1. GuestKDZJ – GuestQLTW, freechess.org, 2017.

6.Nf3 a6 7.d3=.

6.Nf3 Nb7 7.Nc3+= f6 8.d4 Bg4 9.Bd3 h5? (better is 9...ed4!? 10.ed4 Qe7 11.Kd2 0–0–0+/–) 10.Bg6 Ke7 11.de5 fe5? (11...Kd7+–) 12.Qd5 Nc5 (12...Nh6 13.Qb7 Qc8+–) 13.Qf7 1–0. Speedy – Macho, internet, 2017.

6.Nf3 Nb7 7.Be2 Nc5 (better is 7...e4!? 8.Nd4 Qg5+=) 8.d4+/– Ne4 (8...ed4 9.ed4 Ne4 10.0–0+/–) 9.de5+– de5 (9...Bf5 10.0–0+–) 10.Qd8 Kd8 11.0–0 (11.Ne5 Ke8+–) 11...Bb7 (better is 11...f6!?+/–) 12.Ne5 f6?? (better is 12...Ke8+–) 13.Nf7 (13.Nf7 Ke8 14.Nh8+–) 1–0. GuestFKKV – GuestCLFD, freechess.org, 2017.

6.Nf3 Be6 7.Qc2 g6 (7...c6!?=) 8.d4+/– Bg7 (8...ed4 9.Nd4 Nf6 10.Be2+/–) 9.de5 Bf5 10.e4 Be6 11.Nbd2 (11.ed6 Bb2 12.Qb2 f6+–) 11...f5? (11...de5!? 12.Ne5 f6+–) 12.ed6 (better is 12.Nd4 Bc8 13.ed6 Bf6 14.ef5 gf5 15.dc7 Qc7+–) 12...Bb2? (12...Nf6 13.e5 Nd7+–) 13.Qb2 Qf6 14.e5 Qd8 15.Nd4 Kd7 16.Qb4 c5 (16...Nh6 17.Be2 Nf7+–) 17.bc6 (worse is 17.Ne6 Ke6 18.Qc3 a6+–) 17...Nc6 18.Nc6 (18.Ne6?! Ke6 19.Qb3 Kf7 20.c5 Kg7+–) 18...Kc6 19.g3 Kd7 (19...Kb7 20.Bg2 Kb8+–) 20.Qb5 Kc8 21.Qc6 1–0. Otte,Marco (1735) – Dolphijn,M (1950), Gent, 2002.

6.Nf3 h6 7.d4+= f6 (7...ed4 8.Bd4 Be6 9.Nbd2+=) 8.Bd3+/– Be6 (8...Ne7 9.0–0 Be6 10.d5+/–) 9.d5 Bf7 10.Nbd2 (10.Nc3 f5 11.Bf5 Nc4+/–) 10...g6 (10...a6 11.ba6 c6 12.dc6 Nc6 13.Qa4+/–) 11.0–0 Qe7 (11...f5 12.e4+/–) 12.Qc2 f5 13.e4 f4 (13...fe4 14.Ne4 a6 15.ba6+/–) 14.c5!+– Nb7 (14...bc5 15.Qa4 Combination; 14...dc5 15.Be5 Deflection) 15.cd6 Qd6?? (better is 15...cd6 16.Qc6 Qd7+–) 16.Nc4 Qc5 (16...Qe7 17.Nce5 Qc5 18.Nc4+–) 17.Ba3 Qb5 (17...Qa3 18.Na3 Nc5 19.Nc4+–) 18.Nce5 Qa4 19.Qa4 1–0. Janek – Al Fresco, internet, 2017.

5.c4 Be6

6.Qa4 b6 7.Bc3 Nb7 8.d4 ed4 9.ed4 Qh4 (9...a6 10.Bd3=) 10.Nf3+= Qe4 11.Be2 Nf6 12.Nbd2 (12.Bd2 Qg6 13.0–0 Ne4+/–) 12...Qg6+= 13.0–0 Bg4 (13...Be7!?+/–) 14.Rfe1 Be7 15.Nh4 Qg5 16.Ndf3 (16.Bg4 Qg4 17.Nhf3 Nd8+/–) 16...Bf3 (16...Qh5 17.Bd3+/–) 17.Nf3+– Qg6 18.Bf1 (18.Nd2 d5+–) 18...Ne4+/– 19.Bb2 0–0? (19...f5 20.Bd3+–) 20.Bd3 (better is 20.Re4 Qe4 21.Re1+–) 20...f5 21.Qc2 Na5 (21...Ng5 22.Re7 Nf3 23.Kh1 Nh4+–) 22.Be4 (better is 22.Re4 fe4 23.Be4+–) 22...fe4+/– 23.Re4?? (better is 23.Qe4 Qe4 24.Re4+=) 23...Rf3–/+ 24.Qe2 Rff8?? (better is 24...Raf8 25.Rf1 Bd8–+) 25.Re7+/– Qf6?? (better is 25...Rae8!? 26.Re3 Re3 27.fe3 c6+/–) 26.Re1 (better is 26.d5 Qg6 27.Rg7 Qg7 28.Bg7 Kg7+–) 26...Kh8?? (better is 26...Rf7 27.Re6 Qf5+–) 27.d5 Qg6 28.Bg7 Kg8 29.Bf8 Rf8 30.Re6 (better is 30.Rc7!? h5+–) 30...Qf5 (30...Qf5 31.Re3 Nc4 32.Rg3 Kh8+–). DEFFM – GuestQGSN, freechess.org, 2017.

6.Qa4 b6 7.d4 e4 8.d5 Qd7 9.de6 Qe6 10.Nd2 Nf6 11.Ne2 g5 12.Ng3 Rd8 (12...Rg8 13.Rd1+–) 13.Nge4! Bg7 (13...Qe4 14.Ne4) 14.Ng5 Qg4 15.Ngf3 d5 16.h3 Qe6 17.cd5 Qd5 18.Be2 Rg8 19.0–0 Qe6 20.Nd4 Qe5 21.Bc3 (21.Rfd1 Qe7+–) 21...Ne4 22.Ne4 Qe4 23.Bf3 Qg6 24.Ba5 Bd4 25.ed4 Qf5 (25...ba5 26.b6 Kf8 27.bc7 Rc8+–) 26.Rae1 Kf8 27.Bb4 c5 (27...Kg7 28.Be7 Rd7 29.Bg4+–) 28.bc6 Kg7 29.Qb3 (better is 29.c7!? Rc8 30.Bg4 Qf4 31.Bc8 Rc8+–) 29...Qd5 (29...Rde8+–) 30.Bc3 (30.Bc3 Qb3 31.ab3+–; better is 30.Bd5 a5 31.Be7 Rd5 32.Qd5+–) 1–0. Geyer,Ulf – Mueller,K, RH–ch U20 Gau Algesheim, 1994.

6.Qa4 b6 7.d4 Nf6 8.de5 de5 9.Be5 Qd7 10.Bf6 gf6 11.Nc3 0–0–0 12.Rd1 Qe7 13.Rd8 Qd8 14.Nf3 Bc5 15.Ne4 f5?? 16.Nc5+– Re8 17.Be2 Qd6 18.Nb3 Nb3 19.Qb3 Rd8 20.0–0 Qc5 21.Qa4 Bd7 22.Qa7 Be6 23.Nd4 Bc4 24.Nc6 Rd6 25.Qb8 Kd7 26.Qd8 Ke6 27.Qe7 1–0. byron_de – Geordiedazza, ChessWorld.net, 2003.

6.Qc2 b6 7.Be2 Be7 (7...c6 8.bc6 Rc8 9.Nf3=) 8.Nf3+= Bf6 (8...c6 9.bc6 Nc6 10.d4 ed4 11.0–0=) 9.d4 e4 (9...ed4!? 10.Nd4 Rc8+=) 10.Nfd2 d5 11.cd5 Bd5 12.Ne4 Be4 (12...c6 13.Nbc3+–) 13.Qe4 Ne7 14.0–0 0–0 15.Nd2 Qd6 16.a4 (16.Bd3 Ng6+–) 16...Rfe8 (16...c5 17.Rfd1 cd4 18.Bd3+–) 17.Bd3 Qb4?? (17...Ng6 18.Qf5 Be7+–) 18.Qh7 Kf8 19.Ba3 (19.Ba3 Qa3 20.Ra3+–) 1–0. GuestDPNV – GuestDMWH, freechess.org, 2017.

6.d3 Nf6 7.Nf3 Be7 8.Bc3 c5 9.Qa4 b6 10.Be2 0–0 11.Qc2 e4 (11...h6 12.0–0=) 12.Ng5+= ed3 13.Bd3 h6 (13...Qd7 14.Nd2 g6 15.Rd1+=) 14.Ne6 fe6 15.0–0 Nb7 (15...d5 16.Nd2+=) 16.Nd2+/– d5 17.Rad1 Nd6 18.Qb3 dc4 (better is 18...Qe8!?+/–) 19.Nc4+– Nd5 20.Be5 Qd7?? (better is 20...Nf7 21.e4 Ne5 22.Ne5 Nc7+–) 21.e4 Nc7 (21...Nf7 22.ed5 ed5 23.Be4+–) 22.Nd6 Bd6 (22...Bf6 23.Bf6 gf6 24.Bc4+–) 23.Bc4 Nd5 24.ed5 Be5 25.de6 Qe7 (25...Bh2 26.Kh2 Qc7 27.Qg3 Qg3 28.Kg3+–) 26.Rd7 Bh2 (26...Rae8 27.Re7 Re7 28.Bd3+–) 27.Kh2 Qh4 28.Kg1 Rfc8 (28...Kh8 29.e7 Rfe8 30.Re1+–) 29.e7 Kh8 (29...Kh7 30.Qd3 Kh8 31.Re1+–) 30.Bf7 Qg4 (30...Qf6+–) 31.Rfd1 Qh4 32.Qd5 c4 33.Rd8 Rd8 34.Qd8 1–0. pierred – anony, internet, 2015.

6.d3 Nf6 7.Nf3 Be7 8.Be2 0–0 9.0–0 c6 10.a4 cb5 11.ab5 b6 12.Nc3 Nb7 13.Na4 d5 (13...a6 14.Nc3 a5 15.Ng5+=) 14.cd5 (14.Ne5 Qc7+/–) 14...Bd5 (14...Qd5!? 15.Nc3 Qc5+=) 15.e4 Be6 16.Be5 Ng4 17.Bb2 Nd6 18.h3 Nf6 (18...Nh6 19.Nc3+–) 19.Nd4 Bd7 20.e5 Nb5 21.Nb5 Bb5 22.ef6 Bf6 23.Bf6 Qf6 24.Nc3?? (24.Bf3 Rac8+–) 24...Bc6?? (better is 24...Qc3 25.Bf3 Rad8 (25...Bd3 26.Rc1 Qd4 27.Ba8 Ra8 28.Qd2+–) 26.Ra7 Bd3–/+) 25.Ne4+– Qg6 26.Bf3 f5 27.Qb3 Kh8 28.Ng3?? Bf3+= 29.gf3 f4 30.Qd5? fg3–+ 31.fg3? Qg3 32.Kh1 Qh3 33.Kg1 Rad8 34.Qe4 Qg3 35.Kh1 Rf4 36.Rf2 Re4 37.Rg2 Rh4 38.Kg1–+ Qf3 39.Rf1 Qd3 (39...Qd3 40.Rf6 Qe3 41.Rgf2 Rd1 42.Kg2 Qh3; 39...Qe3 40.Rff2 Rc8 41.Rg7 Rc1 42.Kg2 Qh3) 0–1. Fournier,Frederic (1765) – figuerola (1690), Active (5/0), 2005.

4.b5 Nb4

5.c3 Nd5 6.c4 Nb4?? 7.a3+– c5 (7...Nc6 8.bc6 bc6 9.Nc3+–) 8.ab4 cb4 9.Bd3 (9.d4 e4+–) 9...Nf6 10.Qf3 (better is 10.Qa4+–) 10...Bg4? (10...Qc7+–) 11.Qb7 Be7 12.Be4 (better is 12.Ra7 Ra7 13.Qa7 0–0+–) 12...0–0 (12...Ne4 13.Qe4 Be6+–) 13.Ra7 (13.Qa8!? Qa8 14.Ba8 Ra8+–) 13...Rb8?? (better is 13...Ra7 14.Bh7 Kh7 15.Qa7 Bf5+=) 14.Qe7+– Ne4 15.f3 Re8 (15...Nc5 16.Qd8 Rfd8+–) 16.Qf7 Kh8 17.Qg7 1–0. Trkn – John, itsyourturn.com, 2000.

5.c3 Nd5= 6.c4 Nde7 7.d4 ed4 8.ed4 Ng6 9.Be2=.

5.c3 Nd5 6.c4 Nb6= 7.d4 e4 8.a4 d5 9.c5 Nd7=.

5.c3 Nd5= 6.c4 Nde7 7.d4 e4 8.Nd2 (8.d5 Ng6 9.Ne2+=) 8...d5 9.c5 (9.cd5 Nf6=; 9.Ne2=) 9...c6 (9...Nf6 10.Rb1=) 10.a4 Nf6 11.f3 (11.Ne2 Bd7 12.Nf4 Bg4=) 11...Bf5 12.Be2 Qd7 13.Qb3 Nc8 (13...a6 14.Ra3=) 14.bc6 bc6 (14...Qc6?? 15.Bb5 Nd7 16.Bc6 bc6 17.fe4 de4 18.Ne2+–) 15.Ba6 Qc7 (15...ef3 16.Ngf3 Ne7=) 16.Bb7 (better is 16.Qb7 Qb8 17.Qc6 Bd7 18.Qb7+/–) 16...Rb8+= 17.Bc6 Nd7?? (better is 17...Kd8 18.Bb5 a6–/+) 18.Bd7 (18.Bb5 ef3 19.Ngf3+/– (worse is 19.Qd5 fg2 20.Qg2 a6 21.Bd7 Bd7+/–)) 18...Bd7 19.Qc2 Bc6 (19...f5 20.Ne2+=) 20.fe4+/– Be7? (better is 20...de4 21.Ne2 Be7+/–) 21.ed5+– Bd5 22.Ngf3 (22.e4 Be6+–) 22...Bf3 (22...f5 23.0–0+–) 23.Nf3 0–0 (23...Qa5 24.Bc3 Qa6 25.Qe2+–) 24.0–0 Bf6 25.Bc3 Ne7 26.Rfb1 (26.e4 Nc6+–) 26...Nd5 27.Rb8 Rb8 28.Bd2 Qc8 (28...Ne7 29.e4 Nc6 30.Be3+–) 29.Rb1 (29.e4 Nc7+–) 29...Rb1 30.Qb1 Qc7 (30...Nc7 31.e4+–) 31.a5 (31.e4 Nf4 32.e5 Ne2 33.Kf2 Nd4 34.ef6 Nf3 35.Kf3 Qh2+–) 31...h6 (31...Ne7 32.e4 Nc6 33.Qb5+–) 32.e4 Ne7 (32...Nf4 33.Bf4 Qf4 34.e5 Qe3 35.Kf1+–) 33.a6 (33.e5 Bg5 34.Bg5 hg5 35.Ng5 g6+–) 33...Ng6 (33...Nc8 34.Qb7 Bd4 35.Nd4 Qc5 36.Be3+–) 34.Qb7 Bd8 (34...Bd4 35.Nd4 Qc5 36.Be3+–) 35.Qc7 Bc7 36.g3 (36.d5 Nf4+–) 36...Ne7 37.d5 Ng6 (37...Bb8 38.Kf2+–) 38.d6 Bd8 (38...Bb8 39.Bb4 Kf8 40.c6+–) 39.c6 Bb6 40.Kg2 Kf8 41.c7 Bc7 42.dc7 Ne7 43.Bb4 Ke8 44.Be7 Kd7 45.Bd8 Kc8 46.Ne5 f6 47.Nc6 (47.Nf7 Kd7 48.Nd6 Ke6 49.c8Q Ke5 50.Qc4 Kd6 51.Qd5) 47...g5 48.Na7 (48.Ne7 Kd7 49.c8Q Ke8 50.Qe6 g4 51.Ng6 Kd8 52.Qd6 Ke8 53.Qe7) 48...Kd7+– 49.c8Q 1–0. mtr – PinTail, internet, 2001.

5.c3 Nd5 6.c4 Ndf6 7.Be2 a6 8.d4 e4 9.d5 Be7=.

5.c3 Nd5 6.d4 e4 7.c4 Nb6 8.a4 d5 9.c5 Nd7=.

5.Nc3 c6 6.e4 cb5 7.Bb5 Nc6 8.Nf3 a6 9.Bc4 b5+=.

5.Nc3 Bf5? 6.d3 Nf6? 7.Be2?? g6?? 8.h3?? Nfd5?? 9.e4+– Nc3 10.Bc3 Bd7 11.Bb4 Bb5 12.Qd2 Qe7 13.Nf3 0–0–0 14.Rb1 Bg7 15.Bd6! Qd6 16.Rb5 Rhe8 17.Qc3 f6 18.0–0 a6 19.Rb2 Bf8 20.Rfb1 Qc5 21.Qb3 b6 22.Qa4 a5 23.d4! ed4 24.Nd4! Qd4 25.Ba6 Kb8 26.Qc6 (26.Qc6 Qe4 27.Rb6 cb6 28.Rb6 Ka7 29.Qc7 Ka8 30.Bb7 Qb7 31.Qb7) 1–0. gtate (1965) – rbrunner (2035), net–chess.com, 2006.

5.c4 Bd7?? 6.Qb3 c5 7.bc6?? (better is 7.a3 Nc6 8.bc6 bc6 9.Qc2+–) 7...Bc6?? (better is 7...Nc6 8.d4 Nf6=) 8.Qb4+– Nf6 9.Qb3 a5 10.Nc3 (10.d4 a4 11.Qd1 Qc7+–) 10...a4 11.Qc2 Be7 12.Nd5! Nd5 (12...Bd5 13.cd5 Combination; 12...Nd5 13.cd5 Combination) 13.cd5 Bd5 14.Bb5 Kf8 15.Bf1 (15.Nf3 a3 16.Bc3 e4+–) 15...b5 (15...Qc8 16.Qd3 Qe6 17.Ne2+–) 16.Bc3 (16.Bb5? Bg2 17.Ba4 Bh1–+) 16...Rc8 17.Qd1 (17.Rb1 Bc6+–) 17...Bc4 (17...Qd7 18.Rb1+–) 18.Bc4 bc4 (18...Rc4 19.Rb1 Qd7 20.Ne2+–) 19.Nf3 (19.Qa4 f6+–) 19...Bf6 (19...Qd7 20.0–0+–) 20.0–0 (20.Qa4 g6+–) 20...a3 (20...Qe8 21.e4+–) 21.Qa4 Ra8 (21...g6 22.Qa3 Kg7 23.Rfb1+–) 22.Qc4 d5 23.Bb4 (23.Qb3 e4 24.Bf6 gf6+–) 23...Be7 (23...Kg8 24.Qc3+–) 24.Qh4 (better is 24.Be7 Ke7 25.Qh4 Kf8 26.Qd8 Rd8 27.Ne5 f6+–) 24...e4 25.Be7 Qe7 26.Qe7 Ke7 27.Nd4 1–0. GuestVVXJ – GuestJBWJ, freechess.org, 2017.

5.c4 Be6 6.d3 Be7 7.Nf3 Bg4 8.Be2 Nf6 9.0–0 0–0 10.a3 Bf3 11.Bf3 e4 12.de4 Re8 13.ab4 a5 14.ba6 ba6 15.Nd2 Rb8 16.Bc3 c5 17.bc5 dc5 18.Ra6 Qd3 19.Bf6 (19.Qa1 Nd7+–) 19...gf6 (19...Bf6 20.Be2 Qc3 21.Rd6+–) 20.Be2 Qd7 21.Qc2 Qb7 22.Rfa1 Red8 23.Ra7 Rd2 (23...Qb2 24.R1a2 (24.Re7?? Qc2 25.Bf1 Rd2–+) 24...Qc2 25.Rc2+–) 24.Qd2 Qe4 25.Qa2 (25.Qd7!? Kf8+–) 25...Qe5 26.Ra8 Qa1 (26...Bd6 27.g3 Kg7+–) 27.Qa1 Ra8 28.Qa8 Kg7 29.Bf3 Bd6 30.Bd5 h5 31.Qb7 Kh6 32.Qf7 Kg5 (32...Bg3 33.Qf8 Kg6 34.Be4 f5 35.Bf5 Kg5 36.h4 Kh4 37.Qf6) 33.g3 (33.Qg8 Kh6 34.Bf7 Bh2 35.Kh2 h4 36.Qg6) 33...Be5 (33...Bb8 34.Be4 Bg3 35.Qg6 Kh4 36.Qg3) 34.h4 (34.Qg7 Kf5 35.e4) 34...Kh6 35.Bf3 (35.Qf8 Kg6 36.Be4 f5 37.Bf5) 35...f5 (35...Bg3 36.Qf8 Kg6 37.Be4 f5 38.Bf5) 36.Qh5 (36.Bh5 Bg3 37.Qg6) 36...Kg7+– 37.Qf5 Bf6 38.Qc5 (38.Qd7 Be7 39.Qe7 Kg8 40.Bd5 Kh8 41.Qf8 Kh7 42.Be4) 38...Bc3 39.Qd5 (39.Qe7 Kg8 40.Bd5 Kh8 41.Qf8 Kh7 42.Be4) 39...Kf6 40.c5 (40.Qd8 Kf7 41.Bd5 Kg6 42.Qg5 Kh7 43.Be4 Kh8 44.Qh6 Kg8 45.Bd5) 40...Be5 41.c6 (41.Qd8 Kf7 42.Bd5 Kg6 43.Qg5 Kh7 44.Be4 Kh8 45.Qh6 Kg8 46.Bd5) 41...Kf5 42.c7 (42.Qf7 Bf6 43.g4 Ke5 44.Qd5) 42...Kf6 43.c8Q Bb2 (43...Kg7 44.Qcg8 Kh6 45.Qg5 Kh7 46.Qdg8) 44.Qce6 (44.Qde6 Kg7 45.Qcg8) 44...Kg7 45.Qdd7 Kf8 46.Qee8 1–0. Bonetti,Shane – MacChess 5.0, 2000.

5.c4 Bf5 6.d3 e4 7.de4 Be4+=.

5.c4 Nf6?? 6.a3+– Bg4 (6...Nc6 7.bc6 bc6 8.d4+–) 7.f3 Nc2 (7...Be6 8.ab4 Nh5 9.g3+–) 8.Qc2 Be6 9.Ne2 e4 (9...a6 10.f4+–) 10.Nd4 (10.fe4 Bg4+–) 10...Bd7 (10...ef3 11.gf3 Bd7 12.Nc3+–) 11.fe4 c5 12.Nf3 Qe7 13.Be2 (13.Bd3!? 0–0–0+–) 13...Ne4 14.0–0 b6 (14...a6 15.Bd3 Ng5 16.Nc3 Nf3 17.Rf3+– (worse is 17.gf3 ab5 18.Nb5 Bc6+–)) 15.Nc3 Ng5 (15...Nc3 16.Bc3 Be6+–) 16.Nd5 Qe4 (16...Nh3 17.gh3 Qd8 18.Qe4 Be6 19.Nd4 cd4 20.Rf7 Qg5 21.Bg4+–) 17.Nc7 (17.Ng5 Qc2 18.Nc7 Ke7 19.Rf7 Kd8 20.Nce6 Be6 21.Ne6 Ke8+=) 17...Kd8 18.Qe4 Ne4 19.Na8 Be7 20.d3 (20.Bg7 Rg8 21.Bb2 Bh3+–) 20...Ng5 (20...Bf6 21.Nd4 cd4 22.de4+–) 21.Ng5 Bg5 22.e4 (better is 22.Bg7 Be3 23.Kh1 Re8 24.Rf7 Bg5+–) 22...Be3 (22...Be6 23.Bg4! Bg4 24.Rf7+–) 23.Kh1 f6 24.Rf3 (better is 24.Rf6!? gf6 25.Bf6 Kc8 26.Bh8 Kb7+–) 24...Bg5 25.h3 (25.Rg3 Kc8 26.h4 Bh6+–) 25...h5 (25...Be6 26.d4+–) 26.a4 (better is 26.Rg3 Kc8 27.h4 Bh6 28.Bh5 Kb8+–) 26...Bc8 (26...Kc8 27.a5 ba5 28.Ra5+–) 27.a5 Bb7 (27...Bg4 28.ab6 ab6 29.Ra7+–) 28.ab6 Ba8 (28...ab6 29.Ra7 Kc8 30.Rf1+–) 29.Ra7 Kc8 30.Ra8 Kb7 31.Rh8 Kb6 32.Rh5 Bh6 33.h4 Ka5 34.g4 Kb6 35.g5 fg5 36.hg5 Bg5 37.Rg5 g6 (37...Kc7 38.Rg7 Kb6 39.Bf6 Ka5 40.Bc3 Kb6 41.Rf8 d5 42.Rf6) 38.Rg6 Ka5 39.Rd6 Kb4 40.Bc1 (40.d4 cd4 41.Ba3 Ka4 42.Ra6) 40...Kc3 (40...Kb3 41.Bd1 Kc3 42.d4 Kc4 43.Be2 Kb4 44.Bd2 Ka4 45.Ra6) 41.Bd1 Kb4 42.e5 (42.Ra6 Kc3 43.e5 Kd4 44.Bb2) 42...Kc3 43.e6 Kb4 44.e7 Kc3 45.e8Q Kb4 46.Qe1 1–0. GuestDHVS – GuestZBWG, freechess.org, 2017.

5.e4 Nf6 6.a3+– Nc2 7.Qc2 Be7 8.Nc3 0–0 9.Nf3 Bg4 10.d4 ed4 11.Nd4 c5 12.bc6 bc6 13.Nc6 Qd7 14.Bb5 a6 15.Ba4 Qe6 16.f3 Bh5 17.Ne2 Rac8 18.Nf4 Qd7 19.Rc1 Bd8 20.Bf6 Bf6 21.Nh5 Bg5 22.Qc3 Bf6 23.Qf6! gf6 24.Nf6 Kh8 25.Nd7 Rg8 26.Kf2 (26…Rg5 27.Rcd1+–) 1–0. rompepelotas – chessteacher 43, ChessWorld.net TN #12353, 2004.

5.e4 Qh4 6.d3 d5+/– 7.Nf3 Qg4 8.Nbd2 de4 9.de4 f5+–.

5.a3 Nd5=

6.c4 Ndf6 7.Nc3 c5 (7...Ne7 8.d4=) 8.Nf3 Bg4 9.Be2 e4 (9...Ne7 10.0–0+=) 10.Ng5+/– Be2 (10...Bf5 11.Qc2+/–) 11.Qe2 (worse is 11.Ke2 Qd7 12.Nge4 Ne4 13.Ne4 d5=; 11.Ne2?! h6 12.Nh3 d5=) 11...h6 (11...Qe7 12.d3+/–) 12.Nge4 d5 (12...Ne4 13.Ne4 d5 14.Nc3 dc4 15.Qc4+/–) 13.Nf6+– Nf6 14.Qf3 Ne4 (better is 14...dc4 15.Qb7 Qc8 16.Qc8 Rc8+–) 15.Nd5 Nf6 (15...Ng5 16.Qf5 Qd7 17.Qd7 Kd7+–) 16.Nf6 gf6 17.Bf6 Be7 (17...Qd3 18.Qb7 Rd8 19.Qc6 (19.Bh8?! Qd2 20.Kf1 Qd3 21.Ke1 Qd2 22.Kf1 Qd3 23.Ke1 Qd2 24.Kf1=) 19...Rd7 20.Qa8 Rd8 21.Bd8 Qd8 22.Qa7+–) 18.Bh8 f6 (18...Qb6 19.Bc3+–) 19.Qf5 (19.Bg7 Qd3 20.Bf6 Bf6 21.Qf6 Rd8 22.Qe6 Kf8 23.Qh6 Kf7 24.Qh5 Ke6 25.Qg4 Kf7+–) 19...Qd7 (19...Qd6 20.Rd1 Qd8 21.d4 Qa5 22.Ke2+–) 20.Qg6 Kd8 21.Bf6 Bf6 22.Qf6 Kc7 23.Qh6 Rd8 24.Qf4 Kc8 25.Rd1 Qd3 26.h4 Qa3 27.Qf5 Rd7 28.h5 Qb4 29.h6 Qc4 30.h7 (30.h7 Kc7 31.h8Q+–) 1–0. marekt – easydigital, ChessWorld.net, 2005.

6.c4 Ndf6 7.Be2 Be6 (7...Be7 8.Nf3=) 8.Nf3 h6 (8...a6 9.0–0=) 9.h3 (9.d4 e4 10.Nfd2 a6+=) 9...Ne7= 10.Nc3 c6 (10...a6 11.c5=) 11.a4 (11.e4 Qa5+=) 11...Ng6 (11...Nf5 12.d4+=) 12.Qc2 (12.0–0 Qa5+=) 12...Be7 (12...d5 13.d4 e4 14.Nd2=) 13.a5 (13.d4 0–0+=) 13...0–0 (13...cb5 14.cb5 d5 15.0–0=) 14.0–0 (14.d4 cb5 15.cb5 Rc8=) 14...Rc8 (14...cb5 15.cb5 Rc8 16.Rfc1=) 15.d4 (15.a6 b6 16.d4=) 15...ed4 (15...e4!? 16.Nd2 d5=) 16.Nd4+= cb5 (16...Bd7!?+=) 17.Ne6+– fe6 18.Nb5 (better is 18.Qg6 bc4 19.Rfd1+–) 18...a6 (better is 18...Nh8!?+/–) 19.Nd4+– Qd7? (19...e5 20.Ne6 Qe8+–) 20.Qg6 d5 (20...Bd8 21.Rfd1+–) 21.cd5 Qd5 (21...ed5 22.Bd3 Bb4 23.Bf5+–) 22.Bf3 (22.Bg4!? Ng4 23.Ne6 Rf7 24.Bg7 Qf5 25.Qf5 Rf5 26.hg4 Rf7+–) 22...Qd7 23.Rfd1 Bd6 (23...Qe8 24.Qg3 Rf7 25.Ne6+–) 24.Ba3 (better is 24.Ne6 Qe6 25.Bd5+–) 24...Ba3 25.Ra3 Qe7 (25...Rfd8 26.Rb3 Qe8 27.Qe8 Ne8 28.Bg4+–) 26.Rad3 (better is 26.Rb3!? Rcd8+–) 26...Rc5 27.Be2 1–0. DEFFM – GuestZVKD, freechess.org, 2016.

6.c4 Ndf6 7.Nf3 a6 8.Be2 ab5 9.cb5 c6 10.Nc3 Ne7 11.0–0 g6 12.d4 ed4 (12...e4!? 13.Nd2 d5+=) 13.Qd4+/– Bg7 14.Rfd1 d5 15.Ne4! Nf5?? (15...de4 16.Qd8; 15...Ne4 16.Qg7 Pinning (16.Qg7 Deflection)) 16.Nf6+– Bf6 (16...Kf8 17.Qe5 Be6 18.a4 Qf6 19.Qf6 Bf6 20.Bf6+–) 17.Qf6 0–0 (17...Qf6 18.Bf6 0–0+–) 18.Qh8 1–0. Janek – Paul, internet, 2016.

6.c4 Nb6

7.c5 dc5 8.Be5 Bd6?? (better is 8...Nf6=) 9.Bg7+– (9...Be5 10.Be5+–) 1–0. market (2230) – NN, GameColony.com, 2002.

7.c5 Nd7 8.c6 bc6 9.bc6 =.

7.d4 e4 =.

7.d4 Bf5 8.Be2 ed4 9.ed4 Qe7 10.Nd2 0–0–0 11.Ngf3 Re8 12.Ng1 Nf6 13.d5 Ng4 14.h3 Nh6 15.a4 Rg8 16.a5 Nd7 17.Nb3 g5 18.Nc1 Nc5 19.Nf3 Qe4 Black intends g4 20.0–0 g4 21.hg4 Ng4 22.Nd2 Nf2?? (better is 22...Qf4 23.Nf3 Be4+=) 23.Rf2+– Qe3 24.Qe1?? (better is 24.Ra3 Qg5 25.Raf3+–) 24...Bh6 Threatening mate... how? 25.Nf3 Ne4 26.Bd4 Qf4 27.Rf1 (27.b6 Nf2 28.Qf2 a6+/–) 27...Ng3 (27...Rg2 28.Kg2 Qg4 29.Kh1 Ng3 30.Qg3 Qg3–+) 28.Rf2 Ne4 29.Rf1 (29.a6 b6+=) 29...Ng3 30.Rf2 (worse is 30.Ba7 Qg4 31.Nh2 Qg7–/+ (worse is 31...Ne2 32.Qe2 Qe2 33.Ne2 Re2 34.Rf5 Rgg2 35.Kf1 Rh2 36.Rf7+/–)) 30...Ne4 ½–½. Bonetti,Shane – MacChess 5.0, 2000.

7.Nf3 Nf6 8.h3 Be6 9.Qc2 Qd7 10.d3 Be7 11.e4 c6 (11...0–0–0 12.d4 ed4 13.Nd4=) 12.a4 (12.c5 dc5 13.Ne5 Qd6 14.bc6 bc6+=) 12...c5 (12...Rc8!?+=) 13.a5+= Nc8 14.Ng5 h6 15.Ne6 Qe6 (15...fe6 16.Be2+=) 16.Be2+/– 0–0 17.0–0 Bd8 18.Nd2 b6 (18...a6 19.b6+/–) 19.a6 Ne7 20.f4 Bc7 21.fe5 (21.Rae1!?+/–) 21...de5+= 22.Nf3 Ng6 23.Qc3 Rad8 24.Rad1 Nh7 (24...Nf4 25.Qe1=) 25.Rf2 f6 26.Rdf1 Ng5 27.Nh2 (better is 27.Ng5!? fg5 28.Rf8 Rf8 29.Rf8 Nf8 30.Bg4+/–) 27...Nf4= 28.Bg4 Qe7 29.h4 Nge6 (worse is 29...Rd3 30.Qc2 Ngh3 31.Bh3 Rh3 32.gh3 Nh3 33.Kg2 Nf2 34.Rf2+/–) 30.Bf5? (better is 30.Rd1!?=) 30...Nd3 31.Rf3 (31.Rd2 Nd4–/+) 31...Nb2 32.Qb2 Nd4 33.R3f2 Rd6 (33...Qf7!? 34.Rc1 Rd6–+) 34.Ng4–/+ Rfd8 (34...Qe8 35.Ne3–/+) 35.Ne3+= Qf7 36.Nd5 Nf5 37.Rf5 Rd5?? (better is 37...R6d7=) 38.cd5+/– Bd6 39.Qb3 Rc8 40.g3 (better is 40.Qc4!?+/–) 40...c4+= 41.Qc3 (41.Qa4 Bc5 42.Kg2 Bd4+=) 41...Qe8 42.Kh1 (better is 42.Rb1!?=) 42...Qb5–/+ 43.Rf6?? (better is 43.g4–/+) 43...gf6–+ 44.Rf6 Rf8 (better is 44...Qb3 45.Qc1 Qg3 46.Rd6 Qh4 47.Kg2 Kh7 48.Rd7 Kh8–+) 45.Rd6 (45.Qf3 Qd7 46.Kg2–+) 45...Qb1 46.Kh2 Rf2 47.Kh3 Qh1 (47...Qf1 48.Kg4 Qe2 49.Qf3 Qf3 50.Kh3 Qh1 51.Kg4 Qd1 52.Kh3 Qf1 53.Kg4 Qe2 54.Kh3 Rh2) 48.Kg4 Qe4 (48...Qd1 49.Kh3 Qf1 50.Kg4 Qe2 51.Qf3 Qf3 52.Kh3 Qh1 53.Kg4 Qd1 54.Kh3 Qf1 55.Kg4 Qe2 56.Kh3 Rh2) 49.Kh5–+ Qf5 (49...Kg7 50.Rd7 Rf7 51.Qc2 Qc2 52.Rf7 Kf7 53.Kg4 Qe4 54.Kh3 Qh1 55.Kg4 Kg6 56.d6 h5) 50.Kh6 Qh7 (50...Qf8 51.Kh5 Qd6 52.Qc4 Rf5 53.Kg4–+) 51.Kg5 (51.Kg5 Qe7 52.Kh5 Qd6 53.Qc4 Rf5 54.Kg4–+) 1–0. GuestHKRL – GuestYKWV, freechess.org, 2017.

4.b5 Nb8

5.c4 c6 6.a4 a6 7.Nc3 ab5 8.cb5 cb5 9.Bb5 Bd7 10.Qb3 Nc6 11.Nf3 Nf6 12.0–0 Be7 13.d4 e4 14.Nd2 0–0 (better is 14...Na5!? 15.Qd1 d5+=) 15.Nde4 Ne4 16.Ne4 Na5 17.Qc3 Rc8 18.Qd3 Bf5 19.f3 (19.Nf6! Bf6 20.Qf5+–) 19...d5+/– 20.Rac1?? (better is 20.Nf6! Bf6 21.Qf5+/–) 20...de4 21.fe4 Bg6 22.Qb1 Bd6 23.Bd3 Qc7?? (better is 23...Qg5–+) 24.Rc7+– Rc7 25.e5 (25.e5 Bd3 26.Qd3+– (26.ed6?! Bb1 27.dc7 Be4=)) 1–0. Fournier,Frederic – Dijk1 (1610), KasparovChess.com, 2002.

5.c4 f5 6.Nf3 (6.Be2 Qg5 7.Bh5 Kd8=) 6...Nf6 (6...a6 7.Be2=) 7.Nc3 (7.Be2 Be7=) 7...Be6 (7...Be7 8.Be2=) 8.d4+= e4 (8...Nbd7 9.Be2+=) 9.Ng5 (9.d5 Bd7 10.Nd4 Be7+=) 9...Bg8 (9...Bd7 10.Be2+=) 10.Be2 g6 (10...Nbd7 11.0–0+=) 11.0–0 h6 12.Nh3 Bg7 (12...Bf7 13.f3 ef3 14.Bf3+/–) 13.Nf4 Bf7 14.f3 (14.a4 a6+=) 14...Qe7 (14...a6 15.fe4 fe4 16.Qc2+/–) 15.fe4 Ne4 16.Ne4 Qe4? (16...fe4 17.Qe1+=) 17.Qb3 (17.Bf3!? Qe3 18.Kh1 Qf4 19.Qe2 Kd8 20.Bb7+/–) 17...Qe7+/– 18.Bf3 c6 19.e4! fe4 20.Be4! g5 (20...Qe4 21.Rae1 Pinning (21.Rae1 Decoy)) 21.Rae1 gf4 22.Bf5 Be5 (22...Qe3 23.Re3 fe3+–) 23.de5 d5 (23...Kf8 24.e6 Rg8 25.ef7 Qf7 26.Qd3+–) 24.e6 Bh5 25.Bh8 1–0. Janek – Branner, internet, 2017.

5.c4 Bf5 6.Qf3 Bc8 7.Nc3 Nf6 8.d4 Be7 9.Bd3 0–0 10.Nge2 c6 11.0–0 cb5 12.cb5 (12.Nb5?! e4 13.Be4 Bg4=) 12...Nbd7 13.Rac1 h6 14.Ng3 d5 (better is 14...ed4!? 15.ed4 Nb6+/–) 15.Nd5+– Nb6? (better is 15...Nd5 16.Qd5 Nf6+–) 16.Ne7 Qe7 17.de5 Qe5 (17...Nh7+–) 18.Be5 (18.Be5 Rd8 19.Bf5+–) 1–0. Janek – Kevin, internet free game, 2016.

5.c4 Nf6 6.Nf3 Be7 7.d4 ed4 8.ed4 0–0 9.Bd3 Bg4 (9...d5 10.Nbd2=) 10.h3 Bf3 (10...Bh5 11.Nc3+=) 11.Qf3+/– (worse is 11.gf3 d5+=) 11...d5 12.0–0 c6 (12...a6 13.Nc3+/–) 13.a4 (13.Nc3 dc4 14.Bc4 a6 15.ba6 Na6+/–) 13...dc4 14.Bc4 Qc7 (14...Nbd7 15.Nd2+/–) 15.Nd2 Bb4 16.Rfd1 Bd2 17.Rd2 Nbd7 (17...a6 18.ba6 Na6 19.d5 cd5 20.Bd5 Nd5 21.Rd5+/– (21.Qd5?! Rad8 22.Qg5 f6=)) 18.Rc2+– c5 (18...Rae8 19.bc6 bc6 20.Bb5+–) 19.dc5 Nc5 (19...Rfe8 20.c6 bc6 21.Qc6+–) 20.Bf6 gf6 21.Qf6 Ne4 (21...Qb6 22.Qf5 Qg6 23.Qc5+–) 22.Qf5 Rae8 23.Re1 Nd2 (23...Nc5 24.Ree2 Re2 25.Qg5 Kh8 26.Qf6 Kg8 27.Re2 Nd7+–) 24.Qg5 Kh8 25.Qd2 Rg8 (25...Re1 26.Qe1 a5+–) 26.Bb3 Qc8 (26...Qd8 27.Qc3 f6 28.Bg8 Rg8+–) 27.Rc8 1–0. Janek – Guttesman, internet, 2017.

5.Be2 Nf6 6.Nf3 Be7 7.0–0 0–0 8.c4 c6 9.a4 cb5 10.ab5 Be6 11.d3 e4 (11...a6 12.Ng5+=) 12.Nd4 (12.de4!? Nbd7 13.Nc3+/–) 12...ed3+= 13.Bd3 Qd7 14.Ne6 Qe6 (14...fe6 15.Qc2+=) 15.Nd2 g6 (15...d5 16.Qf3+/–) 16.Be2 d5 17.Bf3 Nbd7 18.Qc2 (18.cd5 Nd5 19.Nc4 N7f6+/–) 18...Rac8? (18...Ne5 19.Be2+=) 19.Qa4 (better is 19.Ra7 Ne5 20.Rb7+–) 19...dc4+= 20.Bd4 (worse is 20.Bb7 c3 21.Bc8 cb2+=) 20...Nc5 (20...Bc5 21.Bb7 Rc7 22.Bc6 Bd4 23.ed4+=) 21.Qa7 Ra8? (better is 21...Rfd8+=) 22.Qa8+– Ra8 23.Ra8 Kg7 24.Rc1 Nd3 25.Rc4 Bb4 (25...Ne5 26.Rc7 b6 27.Raa7+–) 26.Rb4! Nb4 27.Ne4 Nbd5 28.Ng5 (28.g4 h6 29.Rd8 Kh7+–) 28...Qe7?? (better is 28...Qd7+/–) 29.Bd5+– Kh6 (29...Qb4 30.h3+–) 30.Nf7 Kh5 (30...Kg7+–) 31.Bf3 (better is 31.Rh8 Nd5 32.Rh7 Kg4 33.Nh6 Kh5 34.g4 Kh4 35.Nf5 Kg4 36.Ne7 Ne7 37.Re7+–) 31...Kh4 (31...Ng4 32.Ne5 Kg5 33.Ng4 Kf5+–) 32.g3 Kh3 33.Ng5 1–0. GuestMFGQ – GuestXZQG, freechess.org, 2017.

5.Nf3 a6 6.Nc3 (6.h3 A) 6...Nf6 7.Nc3 (7.a4 ab5 8.ab5 Ra1 9.Ba1 Be7 10.Nc3 0–0 11.Bb2 Nbd7 12.Be2 h6; 7.ba6 Na6 8.Nc3 Nc5 9.d4 ed4 10.ed4 Nce4 11.Ne4 Ne4 12.Bd3 d5; 7.Na3 Be7 8.Bd3 e4 9.Bf6 gf6 10.Be4 d5 11.Bd3 Ba3 12.Nd4 ab5) 7...Be7 (7...ab5 8.Bb5 Bd7 9.0–0 Nc6 10.d3 Be7 11.Qd2 0–0 12.a4 h6) 8.a4 0–0 9.Be2 Bf5 10.g4 Be6 11.g5 Nd5 12.Nd5 Bd5; B) 6...ab5 7.Bb5 Bd7 8.Nc3 Nf6 9.Bd7 Nbd7 10.0–0 Be7 11.Qe2 0–0 12.a4 c6; C) 6...Be7 C1) 7.Nc3 Nf6 8.a4 0–0 9.Bd3 Nbd7 10.0–0 Nc5 11.Be2 ab5 12.ab5 Bf5; C2) 7.a4 ab5 8.ab5 Ra1 9.Ba1 Nf6 10.Nc3 0–0 11.Be2 h6 12.0–0 Bf5; C3) 7.Na3 Nf6 (7...ab5 8.Nb5 Nf6 9.Bc4 Nc6 10.0–0 0–0 11.Qe2 Bf5 12.d3 Na5; 7...c6 8.b6 Nd7 9.Nc4 Ngf6 10.Rb1 0–0 11.Be2 e4 12.Nh2 d5; 7...Nh6 8.Bc4 ab5 9.Nb5 Nc6 10.0–0 0–0 11.e4 Na5 12.Bb3 c6) 8.Bc4 ab5 9.Nb5 Nc6 10.0–0 0–0 11.a4 Bf5 12.d4 e4; C4) 7.Bd3 Nf6 (7...ab5 8.Bb5 Nc6 9.Nc3 Nf6 10.d4 ed4 11.ed4 0–0 12.d5 Ne5) 8.Nc3 ab5 9.Bb5 Nc6 10.d4 ed4 11.Nd4 Bd7 12.0–0 0–0; C5) 7.d4 ed4 (7...e4 8.Nfd2 Nf6 9.Nc3 d5 10.a4 0–0 11.Be2 Bf5 12.0–0 ab5) 8.Nd4 Nf6 9.Nc3 0–0 10.Bd3 ab5 11.Ncb5 Nc6 12.0–0 Ne5) 6...Nf6 7.a4 (7.Bc4 ab5 (7...d5 8.Bb3 e4 9.Nd4 ab5 10.Ndb5 c6 11.Nd4 c5 12.Nde2 c4) 8.Bb5 Nc6 9.d4 Bd7 10.d5 Na5 11.Bd7 Qd7 12.0–0 Be7; 7.h3 Be7 (7...ab5 8.Bb5 Nc6 9.0–0 Bd7 10.a4 Be7 11.e4 0–0 12.d4 h6) 8.a4 0–0 9.Be2 Bf5 10.g4 Be6 11.Ng5 Bd7 12.Qb1 d5; 7.Ng5 ab5 (7...Be7 8.a4 h6 9.Nge4 Ne4 10.Ne4 0–0 11.Bd3 d5 12.Ng3 e4; 7...d5 8.a4 Bd6 9.Be2 h6 10.Nf3 0–0 11.0–0 Bf5 12.d4 e4) 8.Bb5 Nc6 9.d4 ed4 10.ed4 d5 11.0–0 Be7 12.Nf3 0–0) 7...ab5 (7...Bf5 8.d4 Nbd7 9.ba6 ba6 10.Bc4 Be7 11.0–0 0–0 12.Qe2 e4) 8.ab5 Ra1 9.Qa1 Be7 10.Bc4 Nbd7 (10...0–0 11.Qa7 Nbd7 12.0–0 e4) 11.0–0 (11.Qa7 e4 12.Nd4 Ne5) 11...0–0 12.Qa7 Nb6 (12...e4+/–) 13.Bd3 Bg4 14.Qb7 Bf3 15.gf3 Nfd7 16.Qc6 Bh4 17.Ra1 Qg5 18.Kf1 Qh5 19.Ke2 (worse is 19.Qc7 Qf3 20.Nd1 e4 21.Qd6 ed3 22.Qd3 Rd8–/+) 19...f5 20.Rg1 (20.Qc7 e4 21.Rf1 Qf3 22.Ke1 ed3 23.cd3 Nc5 24.Qd6 Be7–+) 20...e4? (better is 20...Bd8+=) 21.Ne4!+– fe4?? (21...Rf7 22.Ng3 Bg3 23.hg3 Nf8+–) 22.Rg7 Kh8 23.Rg5 (23.Rg5 Ne5 24.Rh5 ed3 25.cd3+–) 1–0. Anonymous – Anonymous, internet, 2011.

5.Nf3 Bd7 6.Be2 Nf6 7.0–0 Be7 8.a4 0–0 9.c4 a6 10.Qc2 (10.Nc3 Bf5=) 10...c6 (10...Re8 11.d4 ed4 12.Nd4 ab5 13.ab5 Ra1 14.Ba1+=) 11.Nc3+= ab5 (11...Qc7 12.d4+=) 12.ab5 Ra1 13.Ra1 cb5 14.cb5 d5 (better is 14...Qc7!?+=) 15.Ne5+– Bd6 (15...Be6 16.d4+/–) 16.f4 (16.Nd7 Nbd7 17.Qf5 Nb6+–) 16...Be5 (16...Re8!? 17.Bf3 Be5 18.fe5 Re5 19.Ra8+–) 17.fe5 Ng4 18.Nd5 (18.Qd3 Ne5 19.Qd5 Re8+–) 18...Qh4 (18...Bb5 19.Bb5 Qd5 20.Bd3+–) 19.Bg4 Bg4 (19...Qg4 20.Qc7+–) 20.Qc7 Qg5 (20...Be6 21.Qb7 Nd7+–) 21.Ra8 h6 (21...Qd8 22.Qb7 Re8+–) 22.Rb8 Rb8 23.Qb8 Kh7 24.Qb7 Bf3 (24...Be6 25.Nf4 Qh4 26.Qe4 Kg8 27.Qa8 Kh7 28.Qa1+–) 25.Nf6! gf6 (25...Qf6 26.Qf3 Qg6+–) 26.Qf7 Kh8 27.Qf6 Qf6 28.ef6 Be4 29.f7 1–0. Janek – Mezemis, internet, 2017.

5.Nf3 Be7 6.Be2 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Nd7 10.c4 Ngf6 11.d3 Nc5 12.Nbd2 0–0 13.0–0 Bf5 14.e4 Bg4 15.h3 Bh5 16.Bb2 Ne6 17.Re1 Nf4 18.Bf1 h6 19.g3 Ne6 20.Be2 (20.Qc2 c5=) 20...Nh7 (better is 20...Qd7=) 21.Nh4?? (better is 21.d4 ed4 22.Nd4 Be2 23.Qe2=) 21...Be2–+ (21...Bh4?! 22.Bh5 (22.gh4? Be2 23.Re2 Qh4–+) 22...Be7 23.Bf3=) 22.Qe2 Bh4 23.gh4 Qh4 (23...Nf4 24.Qg4 Nd3 25.Rb1–+) 24.Qg4 Qe7 (24...Qg4 25.hg4 Ra8 26.Kh2–+) 25.Nf3 Nf4 26.Re3 f5! 27.Nh4?? (27.ef5 Ng5 Combination) 27...fg4–+ (27...fg4 28.Nf5 Rf5 29.ef5 Qh4–+) 0–1. GuestKHXJ – RoyJuarez, freechess.org, 2017.

4.b5 Nce7

5.c4 Bd7 6.Nc3 Nf6 7.Nf3 c6 (7...Bf5 8.Be2=) 8.a4 a6 9.Be2 Ng6 (9...ab5 10.ab5 Ra1 11.Ba1=) 10.0–0+= Be7 11.d4 ed4 (11...ab5 12.ab5 Ra1 13.Ba1+=) 12.Nd4 0–0 13.Qc2 Re8 14.Rfd1 Qc7 15.h3 d5 (15...Ne5 16.Qd2=) 16.cd5 cd5 17.Qb3 Qe5 (17...Be6 18.a5+=) 18.Nf3 Qf5 19.Nd4 (better is 19.Nd5!? Nd5 20.Qd5 (20.Rd5 Be6 21.Rf5 Bb3+/–) 20...Qd5 21.Rd5+/–) 19...Qg5 (19...Qe5 20.Bf3 Bd6 21.Nd5 (worse is 21.Bd5 Qh2 22.Kf1 Nf4 23.Bf7 Kh8–+) 21...Qh2 22.Kf1 Nd5 23.Bd5+= (23.Qd5?? Nf4 24.Ne2 Qh1 25.Ng1 Nd5 26.Rd5 Qh2–+)) 20.Nf3 (better is 20.Bf3 ab5 21.ab5 Ra1 22.Ra1+=) 20...Qf5+/– 21.Bd3 (21.Nd5!? Nd5 22.Rd5+/– (worse is 22.Qd5 Qd5 23.Rd5 Be6+/–)) 21...Qh5+= 22.Bg6 Qg6 (22...hg6!? 23.Nd5 Nd5 24.Qd5 Qd5 25.Rd5 Be6+/–) 23.Ne5+/– Qf5 24.Nd7 Qd7 25.Nd5 Nd5 26.Qd5 Qd5 27.Rd5 Rad8 28.Rad1 ab5 29.ab5 b6 30.Kf1 f6 31.Ke2 (31.e4 Rd5 32.ed5 Rd8+–) 31...Kf7 32.Rd8 Rd8 33.Rd8 Bd8 34.Kd3 Ke6 35.e4 Bc7 36.Bd4 g6 37.f4 h5 38.g4 hg4 39.hg4 f5 (39...Bf4 40.Bb6 f5 41.Be3+–) 40.gf5 gf5 41.Be3 Bd8 42.Kd4 (42.e5 Ke7+–) 42...Bc7 (better is 42...Bf6 43.e5 Bh4+–) 43.ef5 Kf5 (43...Kd6 44.Ke4+–) 44.Kd5 Bd8 45.Kc6 Ke4 (45...Bf6 46.Kb6 Ke4 47.Bc1+–) 46.Bb6 Bf6 47.Bc7 Bd4 48.b6 Bb6 49.Kb6 (49.Bb6?! Kf4=) 49...Kf5 50.Kc6 Ke4 51.Kd7 Kf5 52.Ke7 Kg6 53.Ke6 (53.Ke6 Kg7 54.f5+–) 1–0. Mess,Jan Peter – Ketelsen,Herbert, Schleswig Holstein–ch, 1991.

5.c4 Bd7 6.Nf3 g6 7.d4 Bg7 8.de5 de5 9.Be5 Nf6 10.Be2 0–0 11.0–0 c6 12.a4 a6 13.Nbd2 Re8 14.Nb3 cb5 15.ab5 ab5?? (better is 15...Qc8+–) 16.Ra8 (16.Ra8 Qa8 17.Bf6 Bf6 18.Qd7 bc4 19.Bc4+–) 1–0. Hanscombe,Richard – Horrell,Stephen (1745), WLS–chT, 2008.

5.c4 f5 6.Be2 Ng6 7.Nf3 Nf6 8.0–0 Be7 9.d4 e4 10.Ng5 h6 11.Nh3 Be6 12.Nc3 Qd7 13.d5 Bf7 14.a4 b6 15.a5+/– Ne5 16.ab6 cb6 17.Na4 Rc8 18.Be5 de5 19.Nc3 g5= 20.Kh1 g4 21.Ng1 h5 22.Qa4 Rc7 23.Rfd1 Kf8 24.Ra2 Bc5 25.Qb3 Kg7 26.Rb2 f4 27.Na4 Bd6 28.Rbd2 f3 29.Bf1 h4 30.Qb1 Bg6 31.Qb2 Bf5 32.Qb3 Kg6 33.Nb2 Nh7 34.Qa4 Ng5=+ 35.Qa6 g3–/+ 36.Qa4 h3 37.Nh3 Bh3–+ 38.fg3 fg2 39.Bg2 Bg2 40.Rg2 Nf3 41.Qc2 Qh3 42.Qe4–/+ Qf5 43.Qf5 Kf5 44.e4 Ke4 45.Rd3 Rch7?? 46.Re2+– Kf5 47.Rf3 Kg4 48.Rf6 Bc5 49.Rf1 Rh3 50.Rg2 e4 51.Rf4 Kg5 52.Re4 Rf8 53.Re5 Kg6 54.Re1 Rf3 55.Rd1 Bd6 56.Nd3 Kf5 57.Rf2 Rf2 58.Nf2 Rh7 59.Kg2 Rc7 60.Rd4 Be5 61.Re4 Bd6 62.h4 Rg7 63.g4 Kf6 64.Re6 (64.Re6 Kf7 65.Rd6+–) 1–0. Machete99 (1970) – shirozy (1880), ICC, 2002.

5.c4 f5 6.Nf3 Nf6 7.Be2 Ng6 8.d4 e4 9.Nfd2 Be7 10.Nc3 0–0 (10...a6 11.ba6 Ra6 12.0–0=) 11.0–0 Qe8 12.f3 ef3 13.Bf3 Nh4 14.Bd5 Nd5 15.Nd5 (worse is 15.cd5 Bg5 16.e4 Be3 17.Kh1 Bd4–/+) 15...Bd8 16.Qb3 c6 17.Nf4 Bf6 18.Rae1 Ng6 19.Nh5 Bg5 Exerts pressure on the backward pawn 20.Nf3 Bh6 21.Ng3 Qd8 22.e4 fe4 23.Ne4 Bg4 24.c5 (24.Ba3!? Bf3 25.gf3+=) 24...d5= 25.Nd6 Qd7=. Dorweiler,Roger – Leite,Catarina (2085), Lisbon–ch Olival Basto, 2000.

5.c4 Bf5 6.d4 Ng6 (6...e4 7.d5 (7.Ne2 d5 8.Ng3 Nf6 9.Qc2 Bg6 10.Nc3 c6=) 7...c6 (7...a6 8.ba6 Ra6 9.Nd2 Qd7 10.Qc2 Qa4+/–) 8.Ne2 cb5 9.Ng3 Bg6 10.cb5 Rc8+=) 7.Nf3 (7.Ne2 Be6 (7...Bg4 8.h3 Be6 9.d5 Bd7 10.Ng3 Be7=) 8.Ng3 Nf6 9.d5 Bg4 10.f3 Bd7=) 7...e4 (7...Nf6 8.Be2 e4 9.Nfd2 Qd7 10.Nc3 Nh4=) 8.Nfd2 Nf6 9.Be2 (9.Nc3 c6 10.d5 Ne5+=) 9...c6 (9...Qd7 10.Nc3 Nh4=) 10.Nc3 (10.g4 Be6+=) 10...Qe7 (10...d5!?=) 11.g4+/– Bd7 (11...Be6 12.Qa4 (12.Nde4?! Ne4 13.Ne4 Bc4 14.Bc4 Qe4=) 12...Qc7 13.Nde4 Ne4 14.Ne4+/–) 12.h4 Qe6 (12...Ng8 13.h5 Nh4 14.Nde4+–) 13.g5 Ng4 (13...Ng8 14.h5 N6e7 15.Nde4 Nc8+–) 14.h5 (worse is 14.Nce4 f5 15.d5 Qe7+–) 14...Ne7 15.bc6 bc6 16.d5 (16.Nce4?! f5 17.Bg4 fg4+/–) 16...cd5 17.Nb5 Kd8 18.Nd4 (18.Nd4 Qe5 19.Bg4 Qg5 20.Bd7 Kd7 21.Qa4 Kd8 22.Bc3+–) 1–0. Poschmann,Hans – Livelo, email 4AMM–06, 1997.

5.c4 Bf5 6.Nf3 Nf6 7.Be2 Nc8 8.0–0 Be7 9.Nc3 0–0 10.Rc1 Nb6 11.a4 Be6 12.d3 Nc8 13.Qc2 Re8 14.d4 ed4 15.Nd4 Bf8 16.Ne6 Re6 17.Bf3 Rb8 18.Nd5 Ne7 (better is 18...Nd7!?+/–) 19.Nf6 gf6 20.Rfd1 Ng6 21.Bd4 b6 22.Qc3 Bg7 23.Bd5 Re7 24.Bf6 Bf6 25.Qf6 Qf8 26.Rd4 Rbe8 27.Rg4 Qg7 28.Qg7 Kg7 29.Bc6 Kh8? (better is 29...Rf8+–) 30.Be8 Re8 31.Rc3 Ne5 32.Rg3 Re6 33.f4 Ng6 (33...Nd7+–) 34.f5 Rf6 35.fg6 hg6 36.Rh3 Kg7 37.Rd3 1–0. Van Esbroeck,Dirk – Neil,Charlie, 33. LSS No Engine Cup Preliminary, 2010.

5.c4 g6 6.d4 ed4 7.Bd4 f6 +=.

5.c4 g6 6.d4 f6 7.Nf3 Bg7 8.Be2 Be6 (8...e4 9.Nfd2 f5 10.h4+=) 9.Nc3+/– Nh6 10.Qc2 0–0 11.0–0 Nf7 12.Rfd1 Qe8 (12...Nf5 13.d5 Bd7 14.h4+=) 13.a4 c5 (13...Qc8 14.h3+/–) 14.dc5 dc5 15.a5 Qc8 (15...Nf5 16.Ba3 b6 17.Bb2+/–) 16.Na4 White prepares b6 (16.Nd5 Re8+/–) 16...Rb8 (16...Qc7 17.Nd2+=) 17.b6 ab6 18.Nb6 Qc6 19.Nd2 Nc8 (19...Rbd8!?+=) 20.Bf3+/– Qc7 21.Qb3 (21.Nd5 Bd5 22.cd5 Ncd6+/–) 21...f5 22.Bd5 Bd5 23.Nd5 Qc6 (23...Qd6 24.Qc2+/–) 24.Nb1 (24.a6!? Kh8+–) 24...Re8 (24...Kh8 25.Nbc3+/–) 25.Na3 Nfd6 (25...Kh8!?+/–) 26.Nb5+– h6 (26...Kh8 27.Nbc7 Rg8 28.Ne6+–) 27.Nbc7 Rd8 28.a6 Na7?? (better is 28...Rd7 29.a7 Na7 30.Ra7 Rc7 31.Nc7 Qc7+–) 29.Ne7 (29.Ne7 Kf7 30.Nc6 bc6 31.Qa3+–) 1–0. Brazhnikov,Vladimir – Pantykin,Nikolai, Novokuznetsk Championship Open, 2009.

5.c4 g6 6.d4 Bg7 7.de5+= Be5 (7...Nh6 8.h3+=) 8.Be5 de5 9.Qd8 Kd8 10.Nc3 (10.Nf3 f6+=) 10...c6 (10...Be6 11.Ne4+=) 11.a4 (11.Nf3 f6+=) 11...Bd7 (11...Be6 12.Rd1 Kc7 13.Nf3+=) 12.Nf3 f6 13.Ne4 Kc7 14.c5 Nd5 (14...Be6 15.Rd1+=) 15.Bc4 (15.Nd6 Nge7+/–) 15...Nge7 16.0–0 (16.h3 Rhd8+=) 16...b6 (16...Rhd8 17.Nd6+=) 17.Rfd1 (17.Rac1 Rhb8+=) 17...f5 (17...Bf5 18.Ng3 Bg4 19.Rac1=) 18.Nd6 (18.Neg5 e4 19.bc6 Bc6 20.Ne6 Kb7+/–) 18...e4 (worse is 18...bc5 19.Nf7 Rhb8 20.N3e5+/–) 19.Ne5 bc5 20.Ndf7 Rhf8 (20...Rhb8 21.Nd7 Kd7 22.Ne5 Kc7 23.Nc6 Nc6 24.Bd5+/– (24.Rd5?! Nb4=; worse is 24.bc6 Nf6–/+)) 21.Ng5 (21.Rac1 Be8 22.Ng5 Kd6 23.Bd5 cd5 24.Nc4 Kd7 25.Nh7 Rh8=) 21...Rh8 (21...h6 22.bc6 Bc6 23.Ne6 Kd6 24.Nc6 Kc6 25.Nf8 Rf8 26.Rd2+=) 22.Nd7 (22.Rac1 a6+=) 22...Kd7= 23.Nf7 Rhc8 (23...Rhf8 24.Ne5 Ke8 25.bc6+/–) 24.Ne5+= Kd6 (24...Ke8 25.h3+=) 25.Nc6 Rc6 26.bc6 Kc6 27.Rd2 Nc3 (27...Rd8+=) 28.Bb5 (better is 28.Rc2 Ned5 29.Bd5 Nd5 30.Rac1+–) 28...Nb5= Black gets the initiative 29.ab5 Kb5 The passed pawn on a7 quickly leads to threats 30.Rd7 Nc6 (30...Nc8 31.Rc7+=) 31.Rh7 (31.Rb7 Kc4=) 31...a5 32.Rg7 (32.Rb7 Ka6 33.Rab1 Nb4+=) 32...a4 (32...Ne5!?+=) 33.Rg6+= a3 34.Rd6 (34.g4 fg4 35.Kf1 Ne5 36.Rb1 Kc4 37.Rc1 Kb3 38.Rb6 Ka4–/+) 34...Nb4 Black plans a2 35.Rd7 (better is 35.Kf1!?+=) 35...a2–/+ 36.Rd2 c4 37.h4? (better is 37.f3–/+) 37...c3–+ 38.Re2 Kc4 (38...c2 39.Kf1–+) 39.h5 (39.f3 Kb3 40.fe4 fe4–+) 39...Kd3 Black prepares c2 (39...Kb3 40.Kf1–+) 40.Kf1 c2 Plans Kc3 41.Ree1 Kc3 (41...Kc3 42.Ke2 Nd3–+) 0–1. Zylla,Johannes – Kaiser, BS–Kreismeisterschaf, 1992.

5.c4 g6 6.Be2 Nf6 7.f4 e4?? (better is 7...Bg7=) 8.Bf6+– Be6 (8...Rg8 9.Nc3 Bf5+–) 9.Bh8 (9.Bh8 Nf5 10.Nh3+–) 1–0. pierre (2165) – Variax (1630), internet, 2007.

5.c4 g6 6.Be2 Bg7 7.Nc3 (7.Nf3 Nf6=) 7...f5 (7...Nf6 8.Nf3=) 8.Nf3 (8.d4 f4+=) 8...Nf6 9.d4 Nd7 (9...e4 10.Nd2=) 10.0–0 0–0 11.a4 b6 (11...a6 12.Qb3+=) 12.Qb3 Kh8 13.a5 a6 (13...c5 14.de5 de5 15.Rfd1+/–) 14.ab6 cb6 15.Ba3 (15.ba6 Ba6 16.Nb5+/–) 15...Nb8 (15...Qc7 16.ba6 Ba6 17.Qb4+/–) 16.Qb4 (16.de5 de5 17.Nd5 Nd5 18.Bf8 Qf8 19.cd5 e4+–) 16...e4 17.Ng5 (17.Qd6 Bf6+–) 17...Bf6 (17...Rf6!?+/–) 18.Nh3+– ab5 19.Qd6 bc4? (better is 19...Bd7 20.Nb5 Kg7+–) 20.Qd8 Rd8 21.Be7 Be7 22.Ra8 Bb7 23.Ra7 Rd7 24.Bc4 Rc7 (24...Nc6 25.Bb5 Na7 26.Bd7+–) 25.Nd5 Rc4 (25...Nc6 26.Ra2 Rc8 27.Nb6 Rb8+–) 26.Rb7 Bd6 (26...Nc6 27.Ne7 Ne7 28.Re7+–) 27.Nb6 (better is 27.Ng5 Bc7 28.Nc7 Nd7+–) 27...Nc6 (27...Rb4 28.Ng5 Kg8 29.Nh7+–) 28.Ng5 (better is 28.Nc4 Bf8+–) 28...h6 (28...Be7 29.Re7! Ne7 30.Nc4+–) 29.Nf7 (29.Nf7 Kg8 30.Nh6 Kh8 31.Nf7 Kg8 32.Nc4+–) 1–0. Szymanska,Maria – Mukavec,S, EU–ch U12 Girls, 1996.

5.c4 Ng6 6.d4 ed4 7.Bd4 Nf6 8.Nf3 Be7 9.Be2 0–0 10.0–0 a6 11.a4 ab5 12.ab5 Ra1 13.Ba1 Bg4 14.Nc3 Nd7 15.Nd5 Bf6 16.Nf6 Nf6 17.h3 Be6 18.Ng5 h6 19.Ne6+/– fe6 20.Qd4 e5 21.Qd3 Ne7 22.Rd1+/– Qd7 23.Be5!+– Qe6 24.Bf6 Qf6 25.Bf3 Ng6 26.Qd5 Kh8 27.Qb7 Ne5 28.Qd5 Qg5 29.Be2 Qh4 30.f3 Rf5 31.Qa8 Kh7 32.f4 Rf7 33.Qe4 g6 34.Rf1 Nd7 35.Bd3 Qf6 36.g4 Nc5 37.Qd5 Re7 38.e4 Qc3 39.Rf3 Qe1+/– 40.Kg2 Nd3 41.Qd3+/– Qe4 42.Qe4 Re4+= 43.Kf2 Rc4= 44.Ra3 Rc5 45.Rb3 Kg7= 46.Ke3 Kf6 47.Ke4 Ke6 48.h4 Rc4 49.Ke3 d5 50.b6 cb6 51.Rb6 Kf7 52.Rd6 Re4 53.Kf3+/– Rd4 54.Ke3 Re4= 55.Kf3 Rd4 56.Rd8 h5 57.gh5 gh5 58.Rh8 Kg6 59.Ra8 Rd3 60.Ke2 Rb3 61.Ra6 Kf5=+ 62.Rd6 Rb5 63.Kf3 Rb3 64.Ke2= (64.Ke2 Ke4 65.Rh6=+). Eralos (2035) – JULIO79 (1950), ajedrez21.com, 2001.

5.Bc4 d5 6.Bb3 (6.Be2 Ng6 7.Nf3 e4 8.Nd4 Qg5 9.g3 Bh3+=) A) 6...Ng6 7.Ne2 (7.c4= Be6 8.cd5 Bd5 9.Nf3 e4+=) 7...a6 8.d4 ab5 9.de5 c6=; B) 6...Qd6 7.d3 Nf6 8.Nf3 Ng6 9.e4 Bg4=.

5.Bc4 Bd7 6.Qf3 d5 7.Bd5 Nd5 8.Qd5 Nf6? 9.Qe5 Be7 10.Nc3 0–0 11.Nd5 Rc8 12.Ne7 Kh8 13.Qf6 1–0. Wall,Bill – Fabijan, playchess.com, 2012.

5.Bc4 Be6 6.Be6 fe6 7.c4 (7.Nf3 Nf6 8.0–0 Qd7 9.a4 a6=) 7...c5 (7...Ng6 8.Nh3= (8.Nc3 d5 9.d3 d4=) 8...Qh4 9.d4 ed4=) 8.bc6 (8.Nf3 Nf6+= (8...Nf5 9.Nc3 Nf6+=) 9.d3 Ng6+=) 8...Nc6= 9.Nc3 (9.Qb3 Qd7=) 9...Nf6 10.Nf3 a6 (10...Be7 11.d4=) 11.Ng5 Qd7 12.Na4 Rb8 13.Nb6 Qe7 14.Ba3 (14.Rb1 h6 15.Nf3 e4=) 14...Nd7 (14...h6 15.Nf3=) 15.Nd7+= Qd7 (15...Kd7 16.Ne4 Qf7 17.Rc1+=) 16.Qg4 Nd8 (16...b5 17.cb5 (17.Ne6?! b4=) 17...ab5 18.Bb2+= (worse is 18.Ne6 Ke7–/+)) 17.0–0 (17.Nh7!? b5 18.c5+–) 17...Be7+= 18.Nh7! Rh7? (better is 18...g5 19.Ng5 Qa4 20.Ne6 Ne6 21.Bd6 Rd8 22.Qg6 Kd7 23.Be5 Rhg8+/–) 19.Qg6+– Nf7 20.Qh7 Bf8 21.f4 e4 (21...b5 22.fe5 b4 23.ed6 Qd6 24.Bb2+–) 22.f5 (better is 22.Qe4 b5 23.Rac1+–) 22...Ng5 (22...Rc8 23.Qg6 e5+–) 23.Qg6 Nf7 (23...Kd8 24.Qg5 Be7 25.Qg7 ef5+–) 24.fe6 Qe6 25.Qe6 (25.Qe6 Kd8 26.Rf7 Be7 27.Qe7 Kc8 28.Qd7#) 1–0. Suutarla,Ari – D'Haens,Charles, IBCA–ol blind 4th fin–C, 1972.

5.Bc4 Nh6 6.Nf3 (6.e4 f5 7.d3 c6=) 6...f6 (6...e4 7.Nd4=) 7.Nh4 (7.e4 d5 8.ed5 Nd5=) 7...d5 8.Bb3 (8.Be2 Be6=) 8...g5 (8...Bg4 9.Nf3+=) 9.Nf3= Bf5 (9...g4 10.Nh4=) 10.0–0 g4 (10...Qd7 11.Nc3=) 11.Nh4+= Be4 (11...Be6 12.e4=) 12.d3 (12.Nc3 Bg6+/–) 12...Bg2? (better is 12...Bg6+=) 13.Ng2+– 1–0. Wall,Bill (2365) – RoccoZ, Microsoft Gaming Zone, 1999.

5.d4 Nd5 6.e4 (better is 6.c4 Nb6 7.de5+/–) 6...Nb4? (better is 6...Ndf6=) 7.a3+– (7.de5 Qh4 8.Qe2 Qg4+–) 7...Nc2 (7...d5 8.ab4 de4 9.Ra4+–) 8.Qc2 g6 (8...ed4 9.Nf3+–) 9.de5 de5 (9...f6 10.ef6 Nf6 11.Nd2+–) 10.Be5 Nf6 11.Bc7 Qe7 12.Bd3 (12.e5 Nd5 13.b6 Nb6+–) 12...Bd7 (12...Ne4 13.Be4 Bg7 14.Ra2+–) 13.Bg3 (13.Nc3 Rc8 14.b6 ab6 15.Bb6 Ne4 16.Be4 Bg7+–) 13...Nh5 (13...Bg7 14.Nc3 Ne4 15.Be4 Bc3 16.Qc3 Qe4 17.Ne2+–) 14.Nf3 White prepares e5 (14.Qc7 Rc8 15.Qb7 f5+–) 14...Rc8 15.Qd2 Be6 (15...Ng3 16.hg3 (worse is 16.fg3 Qc5 17.Rf1 Bb5+–) 16...Bg7 17.Ra2+–) 16.0–0 (16.Be5!? Bg7 17.Bg7 Ng7+–) 16...Bg7 (16...Ng3 17.fg3 Bg7 18.e5+–) 17.e5 (17.Be5 Be5 18.Ne5 Qf6+–) 17...Bd5 (17...Ng3 18.hg3 Bg4 19.Re1+–) 18.Rc1 (18.Bh4!? Qc5 19.Qd1 Bf3 20.Qf3 Qd4+–) 18...0–0 19.Be2 (19.Re1 Ng3 20.hg3 Rfd8+–) 19...Rc5? (19...Ng3 20.hg3 Be5+/–) 20.Rc5 (20.Bh4 Rc1 21.Qc1 Qe8+–) 20...Qc5 21.Qc3 Qc3 22.Nc3 Bf3 23.Bf3 (23.gf3?! Ng3 24.hg3 Be5+–) 23...Ng3 24.hg3 Be5 25.Rc1 b6 26.Nd5 Rd8 27.Ne7 Kg7 28.Nc6 Rc8 29.Re1 (29.Ne5 Rc1 30.Kh2 Rc5+=) 29...Bc3 (29...Bf6 30.Kf1+–) 30.Na7 (30.Re7!? Ra8+–) 30...Ra8 (30...Rc5 31.Rc1+–) 31.Ba8 (31.Ba8 Be1 32.Nc8+–) 1–0. Kurnatowski,Vitali – Schaeuffelen,Moritz, Hessen–ch U14, 2005.

5.Be2 Nf5 6.d4 e4 7.d5 Qg5 8.g4 Nf6 9.Bf6 Qf6 =.

5.Be2 Nf6 6.Nf3 c6 7.0–0 cb5 8.Bb5 Bd7 9.Bd7 Qd7 10.c4 b6 11.d3 Ng6 12.e4 Be7 13.Nbd2 0–0 14.d4 Nf4 15.de5 Nd3 16.ef6 Nb2 17.fe7 Nd1 18.ef8R Rf8 19.Rfd1 Rc8 20.Nd4 a6 21.Nf5 b5 22.Nf3 bc4 23.Nd6 Qe7 24.Nc8 Qc7 25.Nd6 c3 26.Rac1 Qc5 27.Nb7 Qc7 28.Rc3 Qb7 29.Rd8 1–0. themonkey (1915) – mickk (1685), GameColony.com, 2002.

5.Be2 Nf6 6.Nf3 Bf5 7.0–0 Ng6 8.a4 Be7 9.c4 (9.d3 0–0 10.Nbd2 Bd7 11.e4 Nf4 12.d4 ed4=; 9.d4 e4 10.Nfd2 0–0 11.c4 c6 12.Nc3 d5+=) 9...b6 (9...0–0!?= 10.d4 e4 11.Nfd2 c6 12.Nc3 d5=; 9...a6 10.Nc3 0–0 11.d4 Re8 12.a5 ab5=; 9...Qd7 10.d4 e4 11.Nfd2 Nh4 12.f3 ef3=) 10.d4 ed4 (10...e4!? 11.Nfd2 a6+= 12.Nc3 0–0+/–) 11.Nd4+/– Qd7 (11...Be4 12.a5 ba5 13.Nc3+/–) 12.Nc3 (12.Bf3 Be4+– (12...Bg4 13.Ba8 Bd1+–)) 12...0–0+/– (12...Bg4+/–) 13.Ba3 (13.Nf5 Qf5 14.a5 Nh4+/–) 13...Rab8 (13...Bg4 14.Nd5 Be2 15.Qe2+=) 14.Nc6 (14.Nd5 Rbc8+/–) 14...Rbe8 15.Na7 (15.a5 ba5 16.Bb2 Ne5 17.Ra5 Nc6 18.bc6 Qe6+–) 15...Be4 (15...Ne5!?+=) 16.Ne4 Ne4 17.Nc6 (better is 17.Bb2+/–) 17...Bf6? (17...Nc3 18.Qc2 Ne2 19.Qe2+/–) 18.Rc1 (18.Bg4 Re6 19.Nd4 Bd4 20.Be6 Qe6 21.Qd4 Nf6+–) 18...Nc5? (18...Nc3 19.Rc3 Bc3 20.c5 bc5 21.Bg4=) 19.Qc2?? (better is 19.Bc5 bc5 20.Bg4+–) 19...Nf4?? (19...Ne5 20.Nb4 Qd8+/–) 20.Nd4 (better is 20.ef4 Qe6 21.Rfe1+–) 20...Bd4+= 21.ed4?? (better is 21.ef4 Qe7 22.Rce1+=) 21...Ne2 (worse is 21...Re2 22.Qc3 Ncd3 23.h3–+) 22.Kh1 Nc1 (22...Nd4 23.Qd1 Re4 24.Ra1–+) 23.Rc1 (23.dc5 Ne2 24.cb6 cb6–+) 23...Ne4 24.f3 Nf6 25.c5 Re3 26.Bb4 dc5 27.dc5 h6 (better is 27...Rfe8 28.Rd1 Qe6–+) 28.cb6 cb6 29.Bf8 Kf8 30.Qc6 (30.h3 Re8–+) 30...Qc6 (better is 30...Qd2!? 31.Rg1 Re6 32.Qc1–+) 31.bc6 (31.Rc6?? Re1) 31...Nd5 32.Kg1 Re7 33.Rd1 Nc7 34.Rb1 (better is 34.Kf2–+) 34...Nd5 (34...Na8 35.Rd1–+) 35.Rb5?? (35.Rd1 Nf6 36.Rd8 Ne8–+) 35...Rc7?? (better is 35...Re1 36.Kf2 Rd1–+) 36.Rd5= Rc6 37.Rb5 Ke7 38.Rb4 Ke6 39.Kf2 f5 40.Ke3 Ke5 41.f4 (41.Rb5 Ke6=) 41...Ke6 42.Kd4 Kd6 43.h4 g6 44.Rc4 h5?? (better is 44...Rc4 45.Kc4 Kc6=) 45.Rc6+– Kc6 46.Kc4 (better is 46.Ke5+–) 46...Kd6= 47.Kd4 Ke6 48.Ke3 Kd5 49.g3?? (49.Kd3 Kc5 50.Kc3 Kd5=) 49...Kd6 (better is 49...Kc4 50.Kd2 Kb4–+) 50.Kd4= Ke6 51.Ke3 Kd5 52.Kd3 Kc5 53.Kc3 Kd5 54.Kb4 Kc6 55.Kc4 Kd6 56.Kb5 Kc7 57.a5?? (better is 57.Kc4=) 57...ba5–+ 58.Ka5 Kc6 59.Ka6 Kd5 60.Kb6 Ke4 61.Kc6 Kf3 62.Kd6 Kg3 63.Ke6 Kf4 64.Kf6 Kg4 65.Kg6 f4 66.Kf6 f3 67.Ke5 f2 68.Kd4 f1Q 69.Kd5 Qf4 70.Ke6 Kh4 (70...Qd4 71.Ke7 Kf5 72.Kf7 Qd7 73.Kf8 Kf6 74.Kg8 Qg7) 71.Kd5 Kg5 72.Ke6 Qf5 73.Kd6 Kf6 74.Kc6 Ke6 75.Kc7 (75.Kb7 Qb1 76.Kc6 Qb4 77.Kc7 Qd6 78.Kc8 Qd7 79.Kb8 Kd5 80.Ka8 Kc6 81.Kb8 Qb7) 75...Qd5 76.Kb6 (76.Kb8 Kd7 77.Ka7 Qb5 78.Ka8 Kc8 79.Ka7 Qb7) 76...Qc4 (76...Kd6 77.Ka7 Qb3 78.Ka6 Kc6 79.Ka5 Qb5) 77.Kb7 Kd6 78.Kb6 (78.Kb8 Qb4 79.Kc8 h4 80.Kd8 Qb8) 78...Qb3 79.Ka5 Kc6 80.Ka6 Qb6 0–1. Kukel,Attila – Lesay,D, SVK–ch U12 Slovakia, 2000.

5.Be2 Ng6 6.Nc3 d5 7.Nf3 Nf6 8.0–0 Bd6 9.a4 0–0 +=.

5.Be2 Ng6 6.Nf3 e4 7.Nd4 Qg5 8.g3 Bh3 9.a4 Qh6 =.

5.Be2 Ng6 6.Nf3 e4 7.Nd4 Qg5 8.g3 Bh3 9.Nc3 Nf6 10.a4 d5 11.a5 =.

5.Be2 Ng6 6.Nf3 Be7 7.0–0 (7.d4 e4 8.Nfd2 Nf6 9.c4 d5 10.0–0 c6 11.bc6=) 7...Nf6 8.c4 (8.d4 e4 9.Nfd2 0–0 10.c4 c6 11.d5+=; 8.a4 0–0 9.c4 a6 10.Nc3 Bf5 11.d4=) 8...b6 (8...a6!?= 9.ba6 Ra6 10.d4 e4 11.Nfd2=) 9.d4+= Nd7 (9...e4 10.Nfd2 a6 11.ba6+/–) 10.e4 (10.de5 de5 11.Bd3 Bb7+=) 10...Bb7 (10...a6 11.Nc3+=) 11.Nc3 (11.Qc2+=) 11...0–0 12.d5 (12.Nd5 a6+=) 12...Re8 (12...a6 13.Bc1=) 13.a4 a5 14.Qb3 (14.Bc1 Nc5+=) 14...Bg5 15.Rad1 h6 16.Bd3 Nc5 17.Qc2 ½–½. Kukel,Attila – Pitonak,Anton, SVK–ch U12 Slovakia, 2000.

5.e4 Nf6 6.Nc3 Ng6 7.d4 ed4 (7...Be7 8.de5 de5 9.Qd8 Bd8 10.Bc4=) 8.Qd4 b6 (8...Qe7 9.Nge2=) 9.Nd5 Nd5 10.ed5 Qh4 (10...Qe7 11.Kd1+=) 11.Qe3 Be7 (11...Qe7!?+=) 12.Bg7+/– Rg8 13.Bb2 (13.Bd4 Bf5+/–) 13...Bf5 14.c4 Qe4 (14...Ne5!? 15.Be5 de5 16.Qe5 Be4+/–) 15.Qe4+– Be4 16.f3 Bf5 17.Ne2 0–0–0 (17...a6 18.Ng3 Bc8 19.a4+/–) 18.Ng3+– Bd7 19.Bd3 (19.Kd1 Nf4+–) 19...Bg5 (19...Bh4 20.Kf2+–) 20.0–0 Be3 21.Kh1 Nf4? (better is 21...Bf4+–) 22.Bh7 Rge8 (22...Rg3 23.hg3 Ne2 24.Rfe1 Ng3 25.Kh2+–) 23.Bf6 Rh8 24.Bf5 Rdf8 25.Bd7 Kd7 26.Rfe1 Rh6 27.Bg7 (27.Bg7 Rh2 28.Kh2+–) 1–0. Rosner,Dirk – Lauterbach, Tiger SC, 2000.

5.Nf3 b6 6.c4 a6 7.d4 ab5 8.de5 de5 (8...bc4!? 9.ed6 Nf5=) 9.Qd8+/– Kd8 10.cb5 Nf6 (better is 10...f6!?+=) 11.Ne5 Nfd5?? (better is 11...Be6+–) 12.Nf7 (12.Nf7 Ke8 13.Nh8+–) 1–0. Janek – Felix, internet, 2016.

5.Nf3 c6 6.c4 cb5 7.cb5 a6 8.a4 Nf6 9.Be2 Be6 10.0–0 Ned5 11.Nc3 Nc3 12.Bc3 Be7 13.d4 0–0 14.de5+/– Ne4 15.Bb2 d5 16.Nd2 Nd2 17.Qd2 Qc7 18.Rfd1 Rfd8 19.g3 ab5 20.ab5 Ra1 21.Ba1 h6 22.Rc1 Qb8 23.f4 b6 24.Bd4 Bd7 25.Bf3 Bb5 26.Rb1 Bc6 27.Rb6 Qc7 28.Qc3 Rc8 29.Qd3 Bd8 30.Rb3 Qd7 31.Rc3 Bb5 32.Qd1 Rc3 33.Bc3 Bc4 34.Be2 Bb6? 35.Bc4+– Qc6 36.Qd5 Qd5 37.Bd5 Be3 38.Kg2 Bc5 39.Kf3 Bg1 40.Kg2 Bc5 41.h3 Kh7 42.Kf3 Bb6 43.g4 Bd8 44.Ke4 Kg6 45.Bd2 h5 46.f5 Kh7 47.Bf7 hg4 48.hg4 Bh4 49.e6 (49...Be7 50.g5+–) 1–0. valpa – epenz, playchess.de, 2003.

5.Nf3 c6 6.c4 cb5 7.cb5 Bd7 8.Be2 f5 9.0–0 Nf6 10.a4 a5 11.ba6 ba6 12.Nc3 a5 13.Qb3 Rb8 14.Qc2 e4 15.Nd4 Ned5 16.Nd5 Nd5 17.f3 Be7? 18.fe4+/– Nb4 19.Qc1 Rc8 20.Qb1+– 0–0 21.ef5 Bf6 22.Nc2?? Bb2 23.Qb2 Rf5?? 24.Nb4+– Rf1 25.Rf1 Qe7?? 26.Nd5 Qe6 27.Nc3 Qg6 28.g3 Bh3 29.Rf4 Rd8 30.Bf1 Bf1 31.Rf1 d5 32.Qb3 Qg5 33.Qd1 d4 34.ed4 Rd4 35.Qb3 Kh8 36.Rf8 1–0. valpa – epenz, playchess.de, 2003.

5.Nf3 c6 6.bc6 bc6 7.Be2 d5 8.Be5+/– f6 9.Bb2 Nf5 10.c4 Be6 11.cd5 cd5 12.0–0 Bd6 13.g3 Nge7 14.d3 0–0 15.e4 de4 16.de4 Nh6 17.Qc2 Qd7 18.Nbd2 Rfc8 19.Qd3 a5 20.e5 Be5 21.Be5 Qd3 22.Bd3 fe5 23.Ne5 Nd5 24.Be4 Nf7 25.Nf7 Kf7 26.Rfd1 Nf6? 27.Ba8+– Ra8 28.Nf3 a4 29.Ng5 Ke7 30.Ne6 Ke6 31.Rab1 Rc8 32.Rb6 Kf7 33.Ra6 Rc4 34.Rb1 g5 35.Rb7 Kg6 36.Rbb6 Rc1 37.Kg2 Rc4 38.Rf6 Kg7 39.Rfb6 h6 40.Ra7 (40…Rc7 41.Rc7 Kf8 42.Rb8) 1–0. valpa – epenz, playchess.de, 2003.

5.Nf3 c6 6.bc6 Nc6 7.Bb5 Bd7 8.Bc6 Bc6 9.0–0 Nf6 10.d4 Qc7 11.de5= Bf3 12.Qf3 de5 13.Nc3 a6 14.Rfc1 Bd6= 15.Nd5 Nd5=+ 16.Qd5 0–0 17.c4 Rad8 18.Qf3 Rfe8 19.Qg4 Qb6 20.Bc3 Qc5 21.h3 Rf8 22.a3 a5 23.f4?? f5 24.Qg3=+ Rde8 25.Rf1 Rf7 26.Kh1 ef4 27.ef4 Qc4 28.Rfc1?? Qf4 29.Qf4 Bf4 30.Rf1 Bg3 31.Rf3 f4–+ 32.Ba5 Re2 33.Bb6 Rfe7 34.a4 Rb2 35.a5 Ree2 36.Rg1 g5 37.Bd8 h6 38.Bc7 Bf2 39.Rf1 Be3 40.h4 Rg2 41.Rh3 g4 42.Re3 Rh2 43.Kg1 Rbg2# 0–1. NightEagle (2615) – SorinC (2795), TIO_53 (fics, Fremont, California USA), 2001.

5.Nf3 Nd5 6.c4 Ndf6 (6...Nb6 7.c5 Nd7 8.d4=) 7.Nc3 Ne7 (7...a6 8.d4 e4 9.Nd2 ab5 10.Qb3=) 8.d4+= Be6 (8...ed4 9.Nd4 Nf5 10.Nf5 Bf5 11.Qf3+/–) 9.Be2 (9.de5 de5 10.Ne5 Nf5+/–) 9...ed4 (9...Ng6 10.Ng5+=) 10.Nd4 Bc4?? (better is 10...Qd7+=) 11.Bc4+– Ned5 (11...d5 12.Bd3 Ng6+–) 12.Bd5 (12.Nd5 Nd7+–) 12...Ne4 (12...Nd5 13.Nd5 c6 14.bc6 Qa5 15.Nc3 bc6 16.Nc6 Qa6+–) 13.Ne4 (13.Ne4 Rb8 14.Qh5+–) 1–0. pierre – oppo123, internet, 2010.

5.Nf3 Bd7 6.Nc3 h6 7.Bc4 Nf6 (7...c5 8.d4 cd4 9.ed4 Rc8 10.Bb3 Rc3 11.Bc3 Qc7+/– 1.13 (11...e4 12.Nd2)) 8.0–0 Be6 (8...e4 9.Nd4= d5 10.Bb3 Bg4 (10...a6 11.a4 c5) 11.f3 ef3 12.Nf3; 8...Ng6 9.d4 (9.h3 e4 10.Nd4 Be7 11.Nd5 0–0) 9...e4 10.Nd2 Bg4 11.f3 ef3 12.Nf3) 9.Be6+= fe6 10.d4 (10.e4 A) 10...a6 11.Qe2 Ng6+/– (11...ab5 12.d4); B) 10...Ng6 11.d4 a6; C) 10...Qd7+= 11.a4 (11.d4 Ng6) 11...Ng6+/– (11...Kf7 12.Qe2); 10.Qe2 Qd7 11.d4 ed4 12.Nd4) 10...e4= 11.Nd2 d5 12.f3 (12.Qe2+=) 12...ef3 13.Qf3 (worse is 13.gf3 Nf5 14.Qe2 Nd7+=) 13...Qd6 (13...Nf5 14.Ne2 Qd7 15.c4=) 14.e4+= de4? (better is 14...Qb6 15.Qd3 c6+=) 15.Nce4+– Ne4?? (15...Qb4 16.Nf6 gf6 17.Qf6 Rg8 18.Qf7 Kd8+–) 16.Ne4 (16.Qe4?! c6+/–) 16...Qb6 17.Qf7 Kd7 (17...Kd8 18.Nc5 Qb5+–) 18.Nc5 Kd6 (18...Qc5 19.dc5 Kd8 20.Qe6 Nd5 21.c6 bc6 22.bc6 Bc5 23.Rf2 Nb6 24.Bf6 gf6 25.Qf6 Kc8 26.Qh8 Bf8 27.Qf8) 19.Qe6 1–0. mrkt – djuro56, internet, 2011.

5.Nf3 Bd7 6.Be2 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 c6 10.Nc3 cb5 (10...Nf6 11.bc6 bc6 12.e4=) 11.Nb5+= Bb5 (11...Ng6!?+=) 12.Bb5+/– Nc6 13.0–0 Nf6 (13...Qc7 14.c4 Nf6 15.d4+/–) 14.d4+– Be7 (14...e4 15.d5 Nd5 16.Qd5 ef3 17.Bc6 bc6 18.Qc6 Qd7 19.Qe4 Qe7 20.Qf3+–) 15.d5 Nd5? (15...Qb6 16.c4 0–0 17.dc6 bc6+–) 16.Qd5 0–0 17.Bc3 Qb6 (17...Qc7 18.Ra1+–) 18.Ra1 Qc5 (18...Bf6 19.Bd3+–) 19.Qc5 dc5 20.Ne5 Ne5 (20...Bf6 21.Bc6 bc6 22.Kf1+–) 21.Be5 b6 (21...Rd8 22.Bc7 Rc8 23.Bb6+–) 22.Ra7 Bf6 23.Bc7 Bd8 (23...h5 24.Bc4 Be7 25.h3+–) 24.Bd6 f6 (24...Bf6 25.Bf8 Kf8+–) 25.Bc4 Kh8 26.Bf8 g5 (26...h5 27.Bg7 Kh7 28.Bf6 Kg6 29.Bd8 Kf5 30.Rg7 Ke5 31.Be7 Ke4 32.Rg5 b5 33.Bd5) 27.Bg7 1–0. Janek – wazzabet, internet, 2017.

5.Nf3 Bd7 6.Be2 c6 7.a4 cb5 8.ab5 Nd5 (8...Ng6 9.0–0+=) 9.c4 Nb6 10.c5 (10.d4 Be6+=) 10...dc5= 11.Be5 (11.Ne5 Be6=) 11...Qe7 (11...f6 12.Bg3=) 12.Nc3+= Nf6 13.0–0 Qe6 (13...Nfd5 14.Nd5 Nd5 15.Qb3+/–) 14.d4+/– Bd6 (better is 14...cd4!? 15.Bd4 Be7+/–) 15.Ng5+– Qf5 (15...Qe7 16.Bd6 Qd6 17.Nge4 Ne4 18.Ne4+–) 16.Bd6 Qg5 17.dc5 Nbd5? (17...Nc8+–) 18.Nd5 Nd5 (18...Qd5 19.Bf3 Qd1 20.Rfd1 (20.Bd1?! Bb5 21.Bf3 Bf1 22.Kf1 a5+/–; 20.Rad1?! Bb5 21.Bb7 Bf1+–) 20...Bb5 21.Bb7+–) 19.h4! Qf5 (19...Qh4 20.Qd4 Double attack (20.Qd5 Deflection; 20.Qd4 Decoy)) 20.e4! Qe4 (20...Nc3 21.ef5 Nd1 22.Rfd1+–) 21.Bf3 Ne3 22.fe3 Qe3 (22...Qg6 23.Bb7 Rd8 24.Qd5+–) 23.Kh2 Qh6 (23...Kd8 24.Bb7 Qh6 25.Qe1+–) 24.Re1 Kd8 25.Be7 Kc8 26.Bb7 Kb7 (26...Kc7 27.b6! ab6 28.Bd6 Kb7 29.Qf3 Bc6 30.Qf7 Kc8 31.Qc7) 27.Qd7 Kb8 28.Bd6 Qd6 29.cd6 1–0. Janek – Tyzkus, internet, 2017.

5.Nf3 f6 6.Be2 Bd7 (6...a6 7.ba6 ba6 8.Nc3=) 7.c4 c6 8.0–0 cb5 9.cb5 Qb6 10.a4 a6 11.Nc3 ab5 (11...d5 12.Qb3+=) 12.ab5 Ra1 13.Ba1 (13.Qa1 f5+/–) 13...Nc8 (better is 13...d5!?+=) 14.d4+/– Nge7 (14...Be6 15.e4+/–) 15.de5 (better is 15.Qb3!?+–) 15...de5+= 16.Nd5 (16.Nd2!?+=) 16...Nd5 17.Qd5 Ne7 (17...Be6!? 18.Qd3 Be7=) 18.Qb3+= g6 (18...Nf5 19.Rd1 Bc5 20.Bc3+=) 19.Bc4+/– Bg7 (19...Nf5 20.Ne5 fe5 21.Be5+–) 20.Bf7 (20.Bc3 Qc7+–) 20...Kf8+/– 21.Nd2?? (better is 21.Bc4+/–) 21...Qb5–/+ (21...Bb5? 22.Bc4 Qd6 23.Qb5 (< 23.Bb5 b6+–) 23...Qd2 24.Qb7+–) 22.Qb5 (22.Rd1 Qb3 23.Bb3 Bc6=+) 22...Bb5 23.Rb1 (23.Bc4 Bc4 24.Nc4 b5–/+) 23...Bc6 (23...Bd3!? 24.Rb3 Kf7 25.Rd3–+) 24.Bb3 Bh6 25.Nc4 Kg7 (25...b5 26.Nd6 Kg7 27.Bc3–/+) 26.Nd6?? (better is 26.Ne5 Be4 27.Rd1+=) 26...Rd8 27.Nf7 Rd3 28.Nh6 Kh6 29.Be6 Kg7 30.h3 Nd5 31.e4 Nf4–+ 32.Bd5 Nd5 33.ed5 Bd5 34.f3 g5 35.Kf2 h5 36.Rb6 Rd2 37.Ke3 Rg2 38.Rd6 Bc6 39.f4 gf4 40.Kd3 Rg3 41.Kc4 Rh3 42.Re6 f3 43.Re7 Kg6 44.Bc3 f2 45.Kc5 f1Q 46.Kd6 Qd3 47.Kc7 Qc3 48.Kb6 Rd3 49.Rb7 Qb4 50.Kc7 Qe7 51.Kc6 Rc3 52.Kb6 Qb4 53.Ka7 Ra3 54.Kb8 Qb7! 55.Kb7 Rb3 (55...Rb3 56.Kc6 h4–+) 0–1. Scirocco – toldo, Live Game Caissa's Web, 2004.

5.Nf3 Bg4 6.Be2 Nf6 7.0–0 c6 8.a4 (8.Ng5 Be2 9.Qe2 h6 10.Nh3 Qa5 11.a4 Qb4 12.Bc3 Qe4) 8...Ned5 (8...Ng6 9.Nc3= d5 10.h3 Bf3 11.Bf3 Bb4 12.Na2 Bd6) 9.c4+= Nc7 10.d4 (10.Nc3 Be7 11.Qc2 Ne6 12.Rfd1 0–0) 10...e4 11.Nfd2 Be2 12.Qe2 d5 13.Nc3 Be7 14.bc6 bc6 15.Rfb1 0–0 16.Ba3 White prepares c5 16...Ba3 17.Ra3 Rb8 18.Rab3 Rb3 19.Nb3 Ne6 20.c5 Qc7 21.Qa6 Rb8 22.Nd2 Rb1 23.Ndb1 h6 24.h3 g5 (24...Nd7 25.Nd2=) 25.g4 (25.Qe2 Qa5=) 25...h5= 26.gh5 g4 (26...Nh5 27.Qe2 Nf6 28.Kg2+=) 27.Qf1 (better is 27.hg4 Ng4 28.Kf1+=) 27...Ng5–/+ 28.Qg2 Nh3 29.Kf1 Ng5 (29...Qb8 30.Nd2 Qb2 31.Ke2 Qc3 32.Qf1 Nh5 33.Qd1–+) 30.Ke2 (30.Qh1 Nf3+=) 30...Qc8 (30...Qb7 31.Qg3–/+) 31.Qg3 Qa6 32.Kd2 Qb7 (32...Nf3!? 33.Kc2 Qf1+=) 33.Kc2 Nf3 34.Qf4 (34.h6 Kh7 35.Qf4 Kg6=) 34...Kg7 35.h6 Kg6 36.h7 (36.Qd6 Ne1 37.Kd1 Nd3+=) 36...Nh7 37.Qg4 Nhg5 38.Qg3 Ne1 39.Kd2 Nd3 40.f4 Qb2 41.Kd1 Qc1 42.Ke2 Qc2 43.Kf1 Qc1 44.Kg2 Ne1 45.Kf1 Nef3 46.Ke2 Qc2 47.Kf1 Qd3 48.Kf2 Qc2 49.Kf1 Nh2 50.Ke1 (50.Kg1 Nhf3 51.Kf1=) 50...Nhf3 (50...Qc1 51.Ke2 Qf1 52.Kd2 Nhf3 53.Kc2+=) 51.Kf1= ½–½. Toth,Tamas – Pikovszki,Janos, Hungary, 1997.

5.Nf3 g6 6.c4 Bg7 7.Nc3 f5 (7...Nf6!?=) 8.Qb3 h6 (8...Nf6 9.Be2+/–) 9.Be2 (9.c5 dc5 10.Bc4 Kf8+/–) 9...Be6+= 10.d4 e4 11.Nd2 Nf6 12.h4 d5 (12...0–0 13.a4+=) 13.Qa4 (13.Ba3!?+/–) 13...0–0= 14.Ba3 Re8 15.Rc1 (15.Qb3 dc4 16.Nc4 Ned5 17.Nd5 Qd5=) 15...Qd7 (15...a6 16.Qb3+=) 16.g3 (16.0–0 Bf7+=) 16...a6 (16...dc4 17.Nc4 Nfd5 18.Nd5 Nd5= (18...Qd5? 19.Nd6+–)) 17.Be7 (17.b6 Nc6 18.h5 dc4 (18...Nh5?? 19.cd5 Nd4 20.de6 Qa4 21.Na4 Ne2 22.Ke2 cb6 23.Nb6+–) 19.hg6 cb6+=) 17...Qe7 (17...ab5 18.Qb5 c6 19.Qb4 Re7 20.h5+=) 18.c5 (18.Nd5!? Qd7 19.Nf4=) 18...a5 (18...ab5!? 19.Qb5 Reb8–/+) 19.0–0 f4 (19...Ng4 20.Rc2+=) 20.ef4= Bh3 21.Nd1 Bf1 22.Nf1 g5 (22...Qd7!?=) 23.hg5+= hg5 24.f5 (24.fg5!? Nd7 25.g6+=) 24...Kf7 25.Nfe3 Rh8 26.Bf1 ½–½. Novikov,Sergey (1940) – Petkov,Rostislav (1785), 2016.

5.c4 a6

6.Nc3 ab5 7.cb5 Nf6 8.h3 b6 9.d4= ed4 10.Qd4 d5 11.Nf3 Nf5 12.Qd1 Bb4 13.a3 Bc3 14.Bc3 0–0 15.Bd3 Nd6 16.0–0 Nfe4 17.Qc2 f5 18.Ne5 Nc5 19.Nc6 Qe8 20.Rfe1 Nd3 21.Qd3+= Bb7 22.Qd4 Bc6?? 23.Qg7 (23.bc6?! Qf7=) 1–0. gtate (1920) – condour (1890), net–chess.com, 2004.

6.a4 ab5

7.ab5 Ra1 8.Ba1 b6 9.Nc3 Bb7 10.Nf3 Qa8 (10...e4 11.Nd4+=) 11.Be2+= Nf6 12.0–0 Ng6 13.Bb2 Be7 14.Qc2 0–0 15.Ra1 Qc8 16.d3 c6 17.h3 cb5 18.Nb5 d5 (18...Qd7!?+=) 19.Ne5+/– Ne5 20.Be5 dc4 21.dc4 Qc6 22.Bf3 Qd7?? (better is 22...Qe6 23.Bb7 Qe5+/–) 23.Ra7 (23.Bb7 Qb7 24.Ra7 Qc6 25.Re7 Ne8+–) 23...Qe6 (23...Bf3 24.Rd7 Nd7 25.Bg7 Kg7 26.gf3 Rg8+–) 24.Bf6 (24.Bb7?! Qe5 25.Bf3 Rc8+–; 24.Rb7?! Qe5 25.Rb6 Bc5+–) 24...Bf3 25.Be7 (25.Re7?! Qf6 26.Ra7 Qg5+/–; 25.gf3?! Qf6 26.Qe4 Bc5+/–) 25...Re8 (25...Be4 26.Qd2 Re8 27.Qd7 Qd7 28.Rd7+–) 26.gf3 Qh3 (26...Re7 27.Nd4 Ra7 28.Ne6 fe6 29.Qb2+–) 27.Qe4 h6 28.Ra8 (28.Nd6 Rb8 29.Bf6 Qh5 30.Nf7 gf6+–) 28...Rc8 29.Rc8 (29.Nd6!? Ra8 30.Qa8 Kh7 31.Nf7 Qf5+–) 29...Qc8 1–0. GuestMXYX – Mihiel, freechess.org, 2017.

7.ab5 Ra1 8.Ba1 c6 9.Nc3 Be6 10.Nf3 Nf6 11.Be2 g6 12.Ng5 Bd7 13.0–0 Bg7 14.d4 ed4 15.ed4 0–0 16.Re1 h6 17.Nge4 White plans c5 17...Ne4 18.Ne4 f5? (better is 18...Bf5 19.Ng3 cb5 20.Nf5 Nf5 21.cb5 Qb6=) 19.Nd6+– Qc7 20.c5 cb5 (20...Be6 21.Bd3 Bd5 22.Qe2+–) 21.Qb3 Kh8 22.Bb5 Bb5 (22...Nc8 23.Nf7 Rf7 24.Qf7+–) 23.Nb5 Qd7 24.Nd6 Rb8 (24...Bf6+–) 25.Qf7 Bf8 (25...Ra8 26.Bc3 Qd8+–) 26.d5 Bg7 27.Qg7 1–0. GuestSWCR – AyazS, freechess.org, 2017.

7.ab5 Ra1 8.Ba1 c6 9.Nc3 Nf6 10.Nf3 h6 (10...e4 11.Nd4=) 11.Be2 g6 (11...e4 12.Nd4+=) 12.0–0+= Bg7 13.h3 (13.d4 e4 14.Nd2 d5+=) 13...0–0 14.d4 ed4 (14...e4 15.Nd2+=) 15.Nd4 c5 (15...Qc7 16.Qd3+=) 16.Nf3 (16.Nb3 Be6+=) 16...Nh5 (16...d5 17.Qb3+=) 17.Nh4 (17.Qd2 Nf6+/–) 17...Nf6+= 18.Qc2 (18.Qd3 Be6+=) 18...g5 (18...Be6 19.Rd1+=) 19.Nf3+/– Bf5 20.Bd3 (20.e4 Bg6+/–) 20...Qd7 21.Bf5 (21.Ne4 Ne4 22.Bg7 Kg7 23.Be4 Be4 24.Qe4 f5+=) 21...Nf5 (21...Qf5 22.Qf5 Nf5 23.Rd1+=) 22.Rd1 (22.Ne4 Ne4 23.Qe4 Re8+/–) 22...Re8 (22...Qe6 23.Nd5 Nd5 24.cd5+/– (worse is 24.Rd5 Ne3 25.fe3 Qe3 26.Qf2 Qc1 27.Qf1 Qf1 28.Kf1 Ba1=)) 23.Nd5 (better is 23.e4!? Nh4 24.Nh4 gh4 25.Re1+/–) 23...Nd5+= 24.cd5 Ba1 (24...Re3 25.Ng5 Re8 26.Bg7 Kg7 27.Nf3+=) 25.Ra1 Ne7 26.Qd3 Qf5 (26...g4 27.hg4 Qg4 28.Ra7+=) 27.e4 Qf6 28.Ra7 Rb8 (28...Ng6 29.g3 Qe7 30.Nd2+=) 29.Nh2 Nc8 (29...Kg7 30.Nf1+/–) 30.Ng4 (30.Ra2 Nb6+/–) 30...Qb2 31.Ra3 (worse is 31.Nh6 Kh7 32.Nf7 Na7 33.Nd6 Rf8 34.e5 Kh8=) 31...Qc1 (31...h5 32.Ne3+/–) 32.Kh2 Qf4?? (better is 32...Kg7+/–) 33.g3+– Qc1 34.Nh6 (better is 34.Nf6 Kf8 35.Nd7 Ke7 36.Nb8+–) 34...Kg7 35.Nf5 (35.Qf3 f6+– (35...Kh6 36.Qf6 Kh7 37.Rf3 Qg1 38.Kg1 Kg8 39.Qf7 Kh8 40.Rf6 Ra8 41.Rh6)) 35...Kg6 (35...Kf8 36.Qf3 Qb2 37.Nh6+–) 36.e5 (36.Ra2 Qe1+–) 36...de5? (36...c4 37.Qe3 Qe3 A) 38.fe3?? Kf5 39.Rc3 Nb6–+ (worse is 39...Ke5 40.Rc4 Na7 41.Rg4–+); B) 38.Ne3+/–) 37.Nh4 (37.Ne3 Kg7 38.Qf5 Qa3 39.Qe5 Kg6 40.Qb8 Qb2 41.Qc8 Qf2 42.Ng2 Qd4 43.Qb7 c4+–) 37...Kf6? (37...Kg7 38.Qf5 Kg8 39.Qe5 gh4 40.Qb8 Qa3 41.Qc8 Kg7 42.Qg4 (42.Qb7 Qf3 43.Kg1 hg3 44.fg3 Qg3 45.Kf1 Qh3 46.Kf2 Qh2 47.Kf3 Qh1 48.Ke2 Qe4 49.Kd2 Qd4 50.Kc2 Qe4 51.Kb2 Qb4 52.Kc2 Qe4 53.Kb3 Qd3 54.Ka2 c4+=) 42...Kf8 43.gh4+–) 38.Qf3 (better is 38.Qf5 Kg7 39.Qe5 f6 40.Nf5 Kf7 41.Qc7 Kg6 42.Rf3 Qc3 43.Qg7 Kh5 44.Qh7) 38...Ke7 39.Nf5 Kd7 (39...Ke8 40.Ng7 Ke7 41.Re3+–) 40.Re3 (better is 40.Qh5 Nd6 41.Nd6 Kd6 42.Qf7+–) 40...Ne7?? (40...Qb2 41.Nh6 Nd6 42.Nf7+–) 41.Ng7 (better is 41.Ne7 Rf8 42.Qf5 Kc7 43.Qe5 Kb6+–) 41...Rf8?? (better is 41...Qf1+–) 42.Re5 (better is 42.d6 Qe3 43.Qb7 Kd6 44.fe3 g4+–) 42...Qb2 (42...Ng6 43.Rf5 Ne7+–) 43.Qg4 (better is 43.Qf6 Ng6 44.Re7 Ne7 45.Qb2+–) 43...Kd8= 44.d6 (better is 44.Qe2!? Qe2 45.Re2=) 44...Qe5–/+ (44...Qe5 45.de7 Qe7–/+) 0–1. GuestRJFY – GuestNQSB, freechess.org, 2016.

7.ab5 Ra1 8.Ba1 c6 9.d4 e4=.

7.ab5= Bf5 8.Ra8 Qa8 9.Nc3 Nh6 10.Nf3+= c6 11.Be2 cb5 12.Nb5 (12.Nb5 Qd8 13.d4+/–) 1–0. aschellen (1670) – wallibi, internet, 2006.

5.c4 b6

6.d4 ed4 7.ed4 Bb7 8.d5 Qd7 9.Nf3 Nh6 10.Bd3 0–0–0 11.Nbd2 Kb8 12.a4 f5 (12...Ng6!? 13.Bg6 Re8 14.Be4 f5+/–) 13.a5+– Rg8 14.Qa4 Nc8 15.0–0 g5 16.Nd4 Bg7 17.N2f3 g4 18.Nc6 Bc6 19.bc6 Qf7 (19...Qe8 20.Qb5 Ne7 21.ab6 cb6 22.Ra7 Qc6 23.dc6 Bd4 24.Qa6 Bf2 25.Rf2 Rd7 26.Qb6 Rb7 27.Qb7) 20.Nd4 (20.Qb5 Qe6 21.Qa6 Bb2 22.Qb7) 20...Rdf8 (20...Bd4 21.Qb5 Qh5 22.Qa6 Bf2 23.Kh1 Qh2 24.Kh2 g3 25.Kh1 Rde8 26.Qb7) 21.Rfb1 (21.Qb5 Bh8 22.Qa6 Bd4 23.Qb7) 21...f4 (21...g3 22.ab6 cb6+–) 22.Ne6 (22.Qb5 Bf6 23.Qa6 Bd4 24.Qb7) 22...Bb2 (22...g3 23.ab6 gf2 24.Kf2 cb6 25.c7 Qc7 26.Nc7 Ng4 27.Kg1 Kc7 28.Qc6 Kb8 29.Bg7 Rg7 30.Rb6 Nb6 31.Qd6 Kb7 32.Qf8 Rd7+–) 23.Rb2 g3 24.ab6 (24.Nf8 gh2 25.Kh1 Qg7 26.Nd7 Ka8+–) 24...gh2 25.Kh1 cb6 26.c7 Qc7 27.Nc7 Kc7 28.Qc6 Kd8 29.c5 dc5 30.Qh6 Rf7 31.Qe6 Rfg7 32.f3 h5 33.Bf5 Ne7 34.Qd7 1–0. Fournier,Frederic – Letellier,Michel, FRA Ch (team) R1 Senlis–Mers, 1994.

6.d4 ed4 7.Bd4 a6 8.Bd3 d5 9.Nc3 ab5 10.cb5+=.

6.d4 ed4 7.Bd4 Nf5+=.

6.Nf3 a6 7.d4 (7.Be2 ab5 8.cb5 Nf6= 9.Nc3 Ng6 10.0–0+=) 7...e4 8.Nfd2 ab5 9.cb5 d5 (9...Nf6 10.Be2=) 10.Be2 (10.Ba3=) 10...Nf6 (10...Nf5 11.Qc2 Nf6 12.Nc3=) 11.0–0 c6 (11...Nf5 12.Nc3=) 12.Nc3 Bb7 13.Rc1 cb5 14.Bb5 Bc6 15.Bc6 Nc6 16.Nce4 Ne4 17.Rc6 Ra2 (17...Nd2 18.Qd2 Ra2 19.Qc2+–) 18.Ne4+– Rb2 (18...de4 19.Qg4 Qd5 20.Rc8 Ke7 21.Rc7 Ke8 22.Qc8 Qd8 23.Qb7+–) 19.Qg4 (better is 19.Qc1 Rb4 20.Rc8+–) 19...de4? (better is 19...h5 20.Qf5 de4+–) 20.Rc8 h5 (20...f5 21.Qf5 Be7 22.Rd8 Bd8 23.Qe6 Kf8+–) 21.Qe4 Be7 22.Rd8 Kd8 23.Qa8 (23.Ra1 Bd6 24.Ra8 Kd7 25.Ra7 Bc7 26.Qd5 Ke8 27.Qc6 Kf8 28.Qa8 Ke7 29.Rc7 Kf6 30.Qf3 Kg5 31.Qf4 Kg6 32.Qf7 Kg5 33.h4 Kh4 34.Qf4) 23...Kd7 24.Qh8 1–0. Bonetti,Shane – guest897, ICC, 2002.

6.Nf3 Bb7 7.d4+= Ng6 (7...ed4 8.ed4 d5 9.c5+=) 8.a3 (8.de5 de5 9.Ne5 Qd1 10.Kd1 Rd8 11.Ke2 Nh4+/–) 8...Qe7+= 9.Nc3 Nf6 10.Be2 h6 (10...a6 11.ba6 Ra6 12.c5 Bf3 13.gf3+=) 11.0–0 Qd7 (11...a6 12.d5+/–) 12.Qc2 Be7 (12...a6 13.Rfd1 ed4 14.Nd4+/–) 13.Rad1 ed4 14.Nd4 Nh4 (14...0–0 15.Nd5+/–) 15.Nd5 Nd5 16.cd5 Bd5 17.e4 Bb7 18.g3 Ng6 19.Nf5 f6?? (better is 19...Bf8+/–) 20.Bh5+– (20.Ng7?! Kd8+–) 20...0–0–0 (20...0–0 21.Bg6 a6 22.Nd4+–) 21.Bg6 Qe6 (21...Kb8+–) 22.Ng7 (22.Rc1 Qd7 23.Ng7 Kb8+–) 22...Qh3 (22...Qg8 23.Ne6! Rd7+–) 23.Bf5 (23.Bf5 Qf5 24.Nf5+–) 1–0. MrkT – jansax, internet, 2005.

6.Nf3 Bb7 7.Be2 Nf6 8.Nc3 Ng6 9.Qc2 Be7 10.a4 (10.0–0 a6+=) 10...0–0 11.0–0 a5 (11...a6 12.d4=) 12.d4+= ed4 13.ed4 (13.Nd4 Re8+=) 13...d5 14.Ne5 dc4 15.Ng6 fg6 16.Bc4 Kh8 17.Ne2 (17.Rad1 Qd6 18.f3 Rae8+=) 17...Bd6= 18.Ng3 Ng4 19.Qc3? (better is 19.h3!? Nf2 20.Rf2 Bg3 21.Rf8 Qf8 22.Rf1=) 19...Qh4–/+ The mate threat is Qxh2 20.h3 Nf2 21.Rf2 Rf2 22.Kf2 Bg3 23.Kg1 Bf2 24.Kh2 Re8 25.d5 Threatening mate: Qxg7 25...Qf4 (25...Qe7 26.Rf1 Bc5 27.Qf3+=) 26.Kh1= Re7 27.Rf1 Rf7 (27...h6+=) 28.Qc2 (better is 28.Qe5 h6 29.Qe2+/–) 28...Qh4?? (better is 28...Qe3=) 29.Qe2+– Kg8 (29...Rf8 30.Ba3 Bc5 31.Rf8 Bf8 32.Qe8+–) 30.Ba3 (30.Ba3 h6 31.Qe8 Kh7 32.Qf7 Qc4 33.Qf2 Bd5 34.Bb2+–) 1–0. Mroz,Antoni – Kaczynski,Jerzy, corr Poland, 1987.

6.Nf3 Nf6 7.d4 e4 8.Nfd2 Bf5 9.d5 Ng6 10.Nc3+/–.

6.Nf3 Nf6 7.Be2 a6 8.0–0 ab5 9.cb5 Be6 10.Nc3+=.

6.Nf3 Nf6 7.Be2 c5 8.0–0 g6 9.d3 Bg7 10.a4 Bg4 11.h3 Be6 12.Nfd2 a5 13.ba6 Ra6 14.Nc3 d5 15.Nb5 d4 16.ed4 0–0? 17.dc5+– bc5 18.Be5 h5 19.Nf3 Nc6 20.Bd6 Re8 21.Bc5 Na5? 22.Bb4 Nc6 23.Bc3 Qb8 24.Nd2 Qf4 25.Bf3 Ne5 26.Be5 Qe5 27.d4 Qf4 28.d5 Bf5 29.Re1 Raa8 30.Ra3 Bh6 31.Rae3 Ra4 32.Re8 Ne8 33.Re8 Kh7 34.Qa4 Bg7 35.Qd1 Be5 36.g3 Qg5 37.Re5 h4 38.g4 Bd3 39.Rg5 Kh6 40.Re5 f5 41.gf5 gf5 42.d6 f4 43.d7 (43…Kh7 44.Re7 Kg6 45.d8Q Bc4 46.Be4 Kf6 47.Qa1 Kg5 48.Rh7; 43.Re6 Kh7 44.Re7 Kh6 45.Qa1 Kg6 46.Qg7 Kf5 47.Nd4) 1–0. hal1958 – Innessa, playchess.de, 2003.

6.Nf3 Ng6 7.Be2 (7.d4 e4 8.Nfd2 f5 9.d5 a6 10.Nc3+=) 7...Nf6 (7...e4 8.Nd4 Qg5 9.g3 a6 10.Nc3+/–) 8.Nc3 (8.0–0 a6 9.Qc2 Be7 10.d4+=) 8...Bb7 (8...a6 9.0–0 ab5 10.cb5+=) 9.0–0 (9.d4 Be7 10.de5+=) 9...Be7 (9...a6 10.d4+=) 10.Qc2 (10.d4+=) 10...0–0 11.d3 (11.d4 a6+=) 11...Re8 12.a4 Bf8 (12...a6 13.d4=) 13.Rfd1 Kh8 (13...a6 14.d4+=) 14.Ne1 (14.d4 ed4 15.Nd4 Nh4+/–) 14...Qd7 15.Bf3 Bf3 16.Nf3 (worse is 16.gf3 a6+=) 16...Kg8 (16...a6 17.Rdb1+=) 17.Ng5 (17.a5 a6 18.ab6 ab5 19.Ra8 Ra8 20.Nb5 cb6+=) 17...Qf5 (17...Qg4 18.Nge4 Ne4 19.Ne4=) 18.Nge4+/– Be7 19.Nf6 Bf6 20.Nd5 Bd8 21.e4 Qd7 22.Rf1 (22.d4 a6+/–) 22...Ne7 23.d4 Ng6 (23...c6 24.Ne3+/–) 24.c5 (24.de5 de5 25.Rfd1 Qe6+/–) 24...Ne7 (24...c6 25.Nb4 dc5 (worse is 25...cb5 26.c6 Qg4 27.ab5+/–) 26.bc6 Qg4 27.dc5 Nf4=) 25.c6+/– Qe6 26.Ne7 Be7 27.d5 Qc8 (27...Qg6 28.Qd3+/–) 28.Qc3 (28.a5 Qb8+/–) 28...Bf6 (28...a6 29.Qf3+/–) 29.Qg3 Qd8 (29...a6 30.a5+/–) 30.Ra3 (30.a5 Bh4 31.Qg4 Qg5 32.Qg5 Bg5+–) 30...a6 31.Bc1 ab5 32.ab5 Ra3 33.Ba3 Qa8 34.Ra1 Qd8 (34...Qa4 35.Qd3+=) 35.Bb2 (35.Bc1 Rf8+–) 35...Qe7 36.Ra7 (36.Bc1 Rb8+–) 36...Rd8 (better is 36...Bg5+/–) 37.f4?? (37.Bc1!? Rf8+–) 37...Rc8 (37...ef4 38.Bf6 Qf6= (38...fg3?? 39.Be7 Rc8 40.h3+–)) 38.fe5 (38.Qg4 Rd8 39.h3 g6+/–) 38...de5 (38...Be5!? 39.Be5 de5+/–) 39.Ba3+– Qd8 40.Qg4 (40.Qh3 Bg5+–) 40...Ra8 41.Ra8 Qa8 42.Qd7?? (better is 42.d6 h5 43.Qh3+–) 42...Qa3–+ 43.Qc8 Qf8 44.Qc7 (44.Qf8 Kf8 45.d6–+) 44...Qc5 45.Kf1 Qb5 46.Kf2 Qc5 47.Kg3 (47.Kf3 Qc3 48.Ke2–+) 47...Qe3 48.Kg4 h5! 49.Kh5 (49.Kh5 Qg5) 49...Qg5 0–1. Trkn – robert, itsyourturn.com, 2000.

6.Nf3 Nh6 7.a4 a5 8.Qc2 Bb7 9.Be2 g6 10.0–0 Bg7 11.Nc3 0–0 12.e4 c6 13.bc6 Bc6 14.Nd5 Bd5 15.cd5 Rc8 16.Qb3 Rb8 17.Bb5 Ng4 18.d4 ed4 19.Bd4 Bd4 white timed out 0–1. chessxliv (2100) – jhforry (2035), net–chess.com, 2014.

5.c4 c6

6.a4 cb5 7.ab5 b6 (7...Nf6 8.d4 e4 9.d5+=) 8.Qf3 d5 (8...Be6 9.d3+=) 9.cd5 Qd5 10.Nc3 (10.Qd5 Nd5 11.Be5 f6+/–) 10...Qf3 (10...Qb7!?+=) 11.Nf3+/– (11.gf3?! Bb7=) 11...Bb7 (11...f6 12.d4+/–) 12.Ne5+– Nf6 (12...f6 13.Nf3+–) 13.Bc4 Bg2 (13...Ned5 14.Nd5 Bd5 15.Ke2+–) 14.Bf7 (14.Nf7?! Bh1 15.Nh8 Ng4+–) 14...Kd8 15.Rg1 Bh3 16.Nc6 (better is 16.Bb3 Ke8 17.Nf7+–) 16...Nc6 17.bc6 Kc7 (better is 17...Rc8+–) 18.Nd5 Nd5 19.Bd5 Bd6 (19...Kd6 20.e4 a5+–) 20.Rg7 Kd8 (20...Kc8 21.c7+–) 21.Bf6 (better is 21.c7 Kc8+–) 21...Ke8 (21...Kc8 22.c7 a5 23.Ba8+–) 22.Bf7 (better is 22.Rga7 Rc8 23.Bh8 Bf5+–) 22...Kf8 23.Bd5 Rg8?? (23...Ke8 24.Rga7 Rc8 25.Bh8 Bf5+–) 24.Rg8 1–0. GuestKJQG – GuestZCPX, freechess.org, 2017.

6.a4 f5 7.Nf3 (7.d4 Qa5 8.Bc3 Qc7+=) 7...Nf6 (7...c5 8.d3+=) 8.Be2 (8.c5 e4 9.Bf6 gf6 10.cd6 Qd6+=) 8...Ng6 (8...Be6 9.d4 Ne4 10.Nfd2 Nd2 11.Nd2+= (worse is 11.Kd2 Ng6+=)) 9.0–0 (9.h4!?+=) 9...Be7 (9...Bd7 10.d4 Qc7 11.Qc1+=) 10.Qb3 ½–½. Lorenc,Tomas (2180) – Movsesian,Mouseg (2200), CZE–chT2V, 2003.

6.a4 Bf5 7.Na3=.

6.a4 Nf6 7.Nc3 (7.d4 ed4 8.ed4 d5=) 7...d5 8.cd5 Nfd5 (8...Ned5 9.bc6 bc6 10.Nf3=) 9.Nf3 Nc3 10.Bc3 (10.dc3 Qc7=) 10...e4+= 11.Ng5 (better is 11.Ne5 f6 12.Nc4=) 11...Nd5 (better is 11...Qd5!? 12.h4 f6=) 12.Ne4+/– Nc3 13.Nc3 (13.dc3 Be6+/–) 13...Bb4 (13...Be6 14.bc6 bc6 15.Rb1+/–) 14.Qc2 (14.bc6 bc6 15.Qf3 Bd7+/–) 14...Bc3 (14...Bd7!?+/–) 15.Qc3 0–0 16.bc6 bc6 17.Qc6 (17.d4 Bf5+/–) 17...Bd7 (17...Be6 18.Qa6+/–) 18.Qd6 Qc8 (18...Rb8 19.Bc4+/–) 19.Be2 1–0. DEFFM – GuestQKPC, freechess.org, 2016.

6.d4 cb5 7.de5 Qa5 8.Qd2 Qd2 9.Nd2 de5 10.cb5 f6=.

6.d4 ed4 7.Bd4 Nf5 8.Bc3 Nf6 9.bc6 bc6 10.Bd3=.

6.d4 e4 7.d5 cb5 8.cb5 Bf5 9.Bc4 Ng6 10.Ne2=.

6.d4 Ng6 7.de5 Ne5 8.Nf3 Qf6 9.Nd4 Nh6 10.Nc3+=.

6.Be2 cb5 (6...Nf6 7.d4 Qc7 8.Nc3 a6 9.Nf3 e4 10.Nd2=; 6...a6 7.Nf3 Nf6 8.0–0 ab5 9.cb5 Ned5 10.Nc3=) 7.cb5 Bd7 (7...Ng6 8.Nf3 e4 9.Nd4 Qg5 10.g3=) 8.Nf3 (8.d4 Ng6 9.de5 de5 10.Nf3=) 8...Bb5?? (better is 8...Rc8= 9.0–0 Nf6 10.Nc3=; 8...Nf6 9.Nc3 Rc8 10.Rc1=) 9.Bb5+– Nc6 10.0–0 (10.d4 Qa5 11.Nc3 a6+–) 10...Nf6 (10...a6 11.Ba4+–) 11.Qa4 Qd7 (11...Qb6 12.d4 a6 13.de5 de5 14.Bc6 Qc6 15.Qb3+–) 12.Rc1 (12.Rc1 Rc8 13.d4+–) 1–0. mtr – tonnie, internet, 2001.

5.c4 Nf6

6.Nc3 a6 7.ba6 ba6 8.d4= Bf5 9.Nf3 Ng6 10.Nd5 c6 11.Qa4=.

6.Nc3 c5 7.d4 (7.Nf3 Bf5 8.d3 Ng6 9.Be2 Be7 10.0–0 0–0 11.a4=) 7...d5? (better is 7...Bf5!?= 8.d5 (8.Nf3 cd4 9.ed4 e4 10.Nh4 Bg4 11.f3=; 8.Be2 cd4 9.ed4 e4 10.Bc1 d5 11.c5=) 8...Qa5 9.Qd2 Ng6 10.Nge2 a6 11.Ng3=; 7...cd4 8.ed4 Bf5 9.Be2 e4 10.d5 Rc8 11.Qa4=; 7...ed4 8.ed4 cd4 9.Qd4 d5 10.Nf3 Be6 11.Ng5=) 8.de5+/– Ne4 9.Ne4 (9.Nd5? Nd5 10.Nf3 Bg4–+) 9...de4 10.Qd8 Kd8 11.f4 (11.Ne2!? Bf5 12.Nc3+/–) 11...Nf5+= 12.Kf2 Be7 (12...Nh6 13.h3+/–) 13.Be2 (13.Ne2!?+/–) 13...Be6 14.Nh3 h6 15.Rhd1 Kc7 16.g3 g5? (16...Rhd8 17.a4=) 17.Bg4?? (better is 17.g4 Nh4 18.f5 Nf5 19.gf5 Bf5 20.e6+–) 17...Rad8 18.Rd8 Rd8 19.Rd1 Rd1 20.Bd1 Bc4 21.a4 g4 (21...a6 22.g4 Nh4 23.ba6 ba6 24.f5+=) 22.Ng1 (better is 22.Bg4 Be6 23.Bd1+=) 22...h5–/+ 23.Ne2 h4 (better is 23...Bd3–/+) 24.Nc3+= hg3 25.hg3 f6? (better is 25...Nh6 26.Ne4 Bd3+/–) 26.Ne4+– (26.Bg4?! Nh6 27.Be2 Be2 28.ef6 Bf6 29.Ke2 Bc3 30.Bc3 a6 31.ba6 ba6+/–) 26...Bd3 27.Nf6 c4 (27...Bf6 28.ef6 Nh6+–) 28.Nd5 Kd8 29.Ne7 (29.Bg4 Bc5+–) 29...Ke7 (29...Ne7 30.Bg4 Nd5 31.Bf3+–) 30.Bg4 a6 (30...Nh6 31.Bf3 b6 32.g4+–) 31.Bf5 (better is 31.Bf3 ab5 32.ab5 b6+–) 31...Bf5 32.ba6 ba6 33.a5 Kd7 (33...Bg4 34.e4+–) 34.Kf3 Kc6 (34...Bc2 35.e4+–) 35.e4 Bg6 36.f5 Bh7 (36...Bf7 37.g4 Be8 38.e6+–) 37.g4 Kb5 (37...Bg8 38.g5 Kc7 39.Ke3+–) 38.Bc3 Ka4 (38...Bg8+–) 39.Ke3 Kb3 40.Kd4 Bg8 41.e6 Bh7 42.e7 Bg8 43.e8Q Bh7 (43...Bd5 44.Qb8 Bb7 45.Qb7 Kc2 46.Qb2 Kd1 47.Qd2) 44.Qf7 1–0. Trkn – Josh Heming, itsyourturn.com, 2000.

6.Nc3 Bd7 7.Nf3 a6 8.d4 Ng6 (8...e4 9.Ng5 ab5 10.d5=) 9.Qc2 (9.Bd3 ed4 10.Nd4 Ne5=) 9...ab5 10.cb5 Ne7? (10...Be7 11.Bd3=) 11.Bd3 (11.de5 de5 12.Ne5 Be6+/–) 11...g6? (better is 11...Ned5!?+=) 12.de5+– de5 13.Ne5 Bg7 14.0–0 Nfd5 (14...Be6 15.Rfd1+–) 15.Nd5 (worse is 15.Nd7 Nb4 16.Qe2 Nd3+–) 15...Nd5 16.Nd7 Qd7?? (16...Bb2 17.Qb2 Kd7+–) 17.Bg7 Rg8 18.Bc3 (18.Bd4 Nb4 19.Qd2 Nd3 20.Qd3 c6+–) 18...b6 (18...Ra3 19.Bd4 Nb4 20.Qc5 Rd3 21.Qb4+–) 19.Be4 (19.Rad1!? c6+–) 19...Qb5 20.Rad1 (better is 20.Bd4+–) 20...Rd8 (20...c6 21.Rd4+–) 21.Rd5 (21.Bd5 h6 22.Qe4 Kf8 23.Bc6 Qf1 24.Rf1+–) 21...Rd5 22.Bd5 Qd5 23.Rd1 (23.Bf6 Qe6 24.Qa4 Kf8 25.Qa8 Qe8 26.Qe8 Ke8 27.Rd1 c5 28.Rd8) 23...Qe6 (23...Qc6+–) 24.Qa4 Ke7 25.Bb4 (25.Qa3 c5 26.Qa7 Ke8 27.Qb8 Ke7 28.Qc7 Kf8 29.Rd8 Qe8 30.Qd6) 25...Kf6 (25...c5 26.Qa7 Kf6 27.Bc3 Kg5+–) 26.Bc3 (26.Rd7 Ra8 27.Be7 Qe7 28.Qf4 (28.Qa8 Qd7 29.Qf3 Kg7+=) 28...Ke6 29.Re7 Ke7 30.Qe4 Kd6 31.Qa8+–) 26...Ke7 27.Qa3 c5 28.Qa7 Kf8 29.Rd8 Qe8 30.Qa8 (30.Qd7 Qd8 31.Qd8) 30...Qd8 (30...f6 31.Re8 Kg7 32.Rg8 Kh6 33.Qf8 Kh5 34.Rg6 hg6 35.Qh8 Kg5 36.Qh3 b5 37.f4) 31.Qd8 1–0. Zylla,Johannes – Bergmann, WF–Offene Stadtm., 1990.

6.Nc3 Ng6 7.Nf3 A) 7...a6 8.ba6 (8.d4 e4 9.Nd2 ab5 10.d5 bc4 11.Qc2+=) 8...Ra6 9.d4 Be7 10.Nd5 0–0 11.Bd3=; B) 7...Be7 8.d4 Bf5 9.Nd5 Nd5 10.cd5 Bf6 11.de5=.

6.Bd3 a6 7.ba6 ba6 8.Nc3+=.

6.Bd3 g6 7.Ne2= Bg7 8.0–0 0–0 9.f4 (9.Qc2 Nd7=) 9...e4+= 10.Bc2 Be6 11.d3 ed3 (11...Nf5!? 12.Qd2 Ng4 13.Bg7 Kg7 (13...Ng7?! 14.Nd4=) 14.de4 Nfe3 15.Qc3 Kg8–+) 12.Bd3= d5 13.c5 c6 (13...Nf5 14.Bd4+=) 14.Ng3 (14.Nd4 cb5 15.Nb5 b6 16.cb6 ab6=) 14...Ng4 (better is 14...cb5!? 15.Bb5 b6–/+) 15.Bg7+= Kg7 16.Qe2 (16.Be2 Nf6=) 16...d4= 17.e4 Ne3 18.Rf2 (18.f5 Nf1 19.Qf1 cb5=) 18...Bg4 19.Qd2 Rc8 (better is 19...cb5!? 20.h3 Bd7+=) 20.h3+= Bd7 21.f5 (21.Qb4 Be8=) 21...cb5 (better is 21...f6!?=) 22.f6+/– Kg8 23.Nf1 (23.fe7?! Qe7 24.Nc3 dc3 25.Qe3 Qc5=) 23...N7d5 (23...Qe8 24.fe7 Qe7 25.a4 (worse is 25.Ne3 de3 26.Qe3 Qe5–/+) 25...ba4 26.Ne3 de3 27.Qe3 Qc5 28.Qg3=) 24.ed5 Nd5 (better is 24...Re8 25.Be2 a6+–) 25.Bb5?? (better is 25.Be4 Nf6 26.Bb7 (26.Qd4?! Ne4 27.Qe4 Rc5+=) 26...Rc5 27.Qd4+–) 25...Bb5+= 26.Qd4 Nc7 27.Qh4 (27.Qd8 Rfd8 28.Nc3 Bf1 29.Kf1+=) 27...h5 (better is 27...Ne6–/+) 28.Qg5?? (better is 28.Nc3!?=) 28...Ne6?? (28...Bf1 29.Nd2 Bd3 30.Re1–+) 29.Qh6?? (better is 29.Qe3–/+) 29...Qd4 (29...Bf1 30.Nc3 Bd3 31.Re1–+) 30.Na3 Qa1 31.Nb5 Rc5 32.Re2 (32.Na3 Rfc8–+) 32...Qf6 (32...Rb5?? 33.Re6 Qd4 34.Kh1 Qf6 35.Rf6+–) 33.Na3 (33.Rf2 Qe5 34.Na3 Rfc8–+) 33...Qg5 (33...Ng5 34.h4 Rc1 35.Qg5 Qf1 36.Kh2 Qg1 37.Kh3 Rc3 38.g3–+) 34.Qg5 Ng5 35.Re7 (35.h4 Ne6–+) 35...Rb8 36.Ng3 (36.Kf2–+) 36...Rc3 37.Nh5 Ra3 38.Nf4 Ra2 39.h4 Ra4 (39...Kf8 40.Rc7 Ne4 41.Nd3–+) 40.Ng6 fg6 (40...Kg7 41.Nf4–+) 41.hg5 b5 42.Re6 (42.Kf2 b4 43.Re4 Ra2 44.Kf3 b3–+) 42...Rb6 43.Re5 (43.Rb6 ab6 44.Kf2 b4–+) 43...b4 44.Re1 b3 45.Kh2 b2 46.Rb1 Ra1 0–1. Li,Vladimir – Ogorodnov,Nikolai, RUS–ch U10 Serpukhov, 1999.

6.d4 ed4 7.ed4 (7.Bd4 Nf5 8.Nf3 Nd4 9.Nd4 d5+=) 7...g6 (7...a6 8.Nf3+=) 8.Bd3 Bg7 9.Nf3 0–0 10.0–0 Nh5 11.a4 Nf4 12.Re1 Qd7 13.Bf1 Nh5 (13...Qg4 14.g3 (14.Re7?? Nh3 15.Kh1 Nf2 16.Kg1 Nd1–+) 14...Re8 15.Nc3=) 14.Qb3 (14.g3 Re8+=) 14...Nf6 (14...Re8 15.Nbd2+=) 15.Nc3+/– b6 (15...Qd8+/–) 16.Rad1 White prepares the advance d5 (16.c5 Re8+/– (16...dc5? 17.dc5 bc5 18.Bc4+–)) 16...Qd8 (16...Bb7 17.d5+=) 17.d5 (17.g3 Bb7 18.Bg2 a6+/–) 17...Nd7 (17...Bf5 18.Ne2+=) 18.Qc2 (18.Ne4 Nc5 19.Nc5 Bb2 20.Qb2 dc5+/–) 18...Nc5 (18...Nf5+=) 19.Ra1 (19.Ne4 Nf5+/–) 19...a6 (19...Bf5 20.Qd1=) 20.h3 (20.Ne4!?+=) 20...ab5 (20...Bf5 21.Qd1+=) 21.ab5= Ra1 22.Ra1 (22.Ba1 Re8=) 22...Bb7 (22...Bf5 23.Qd1=) 23.Ne2 (23.Na4 Nf5+=) 23...Qd7 (23...Nf5 24.Bg7 Kg7 25.Qc3 Qf6 26.g4 Qc3 27.Nc3=) 24.Ned4 Ra8 25.Ra8 Ba8 26.Bc3 Bb7 ½–½. Feofanov,Alexander – Lunga,Oleg, Omsk CC Championship SF, 2010.

6.d4 ed4 7.Bd4 Nf5 8.Nf3 Nd4 9.Qd4 d5 10.Nc3 Bb4 11.Nd2 Bc3 12.Qc3= 0–0 13.cd5 Nd5 14.Qb3 Be6 15.Bc4 Re8 16.0–0 Nb6 17.Rfd1 Qf6 18.Ne4 Qg6 19.Be6+= Qe6 20.Qe6 Re6 21.Ng5?? Re5–/+ 22.Nf3 Rb5 23.Rd4 Rd5 24.Rad1 Rd4 25.Rd4 Kf8 26.a4 c6 27.a5 Nd5 28.e4 Nf6 29.e5 Nd5 30.Rh4 h6 31.Ng5 Kg8 32.Ne4 Re8 33.f4–/+ f6 34.Nd6 Re7 35.g3 fe5 36.fe5 Re5 37.Nb7 Nf6 38.Rc4 Rb5 39.a6 Rb6 40.Nc5 Nd5 41.Re4 Kf7 42.Re6 Ra6!–+ 0–1. gtate (1850) – flaviolucas (1765), net–chess.com, 2003.

6.d4 ed4 7.Bd4 Nf5 8.Nf3 Nd4 9.Nd4 d5 +=.

6.d4 e4 7.Nc3= c6 8.a4 d5 9.f3 Bf5 10.fe4 Ne4=+ 11.Nf3 g6 12.Be2 Bg7 13.0–0+= h5 14.Ne4 Be4 15.Ng5 Bf5 16.Bd3 Bh6= 17.h4 f6 18.Nf3 Be3 19.Kh1 Qc7 20.Qe2?? Qf4?? 21.Rae1 Bd3 22.Qd3= dc4? 23.Qe3+– Qe3 24.Re3 cb5? 25.Rfe1 Rh7 26.Ba3 ba4 27.Be7 Kf7 28.d5 b5 29.d6 b4 30.d7 b3 31.Ba3 Rhh8 32.Re7 (32.Re7 Kg8 33.Re8 Kg7 34.R1e7 Kh6 35.Bc1 g5 36.hg5 fg5 37.Re6 Kh7 38.Ng5 Kg7 39.Bb2 c3 40.Bc3#) 1–0. thotares (1745) – Variax (1630), internet, 2007.

6.Be2 a6 7.ba6 Ra6 8.Nf3 (8.d4 ed4 9.Bd4= Nc6 10.Nf3+=) 8...Nc6 9.d4 e4 10.Nfd2=.

6.Be2 c6 7.a4 cb5 8.ab5 a6 (8...Ng6 9.d4= e4 10.h4=) 9.Nc3 b6 (9...Bf5!?= 10.Nf3+=; 9...Ng6 10.Nf3+=) 10.Bf3+/– Ra7 11.ba6 Qd7 12.Qb3 Ra6 13.Ra6 Ba6 14.Qb6 (better is 14.d3!? Nc8 15.Nh3+/–) 14...Bc4= 15.Qb8 Qd8 16.Qb4 d5 17.Qa4 (17.e4 Nd7 18.ed5 Bd5=) 17...Qd7+= 18.Qa8 Qd8 19.Qa4 Qd7 20.Be2 (20.Qa8 Qc8 21.Qa4 Qc6+=) 20...Qa4+= 21.Na4 Be2 22.Ne2 Nc6 23.0–0 Bd6 24.Rc1 (24.f4 Nd7 25.fe5 Be5 26.Be5 Nce5 27.Nac3+/–) 24...Na7 (24...Kd7 25.d4 e4 26.Nc5 Kc7 27.Nc3=) 25.Nec3?? (better is 25.f4!? ef4 26.Nf4+/–) 25...0–0 (25...Ke7 26.d3+=) 26.f3 (better is 26.Nb6 d4 27.Nd1=) 26...Nc6?? (better is 26...Rb8=) 27.Nb5+– Ra8 (27...Nb4 28.Nd6 Rb8 29.Nc5+– (29.Be5?! Nd3 30.Bf6 Nc1+–)) 28.Nd6 Nb4 29.Nb6 (29.Nc5!? Ne8 30.Ne8 Re8 31.Be5 h6+–) 29...Rb8 30.Rc8 Rc8 31.Ndc8 Nd3 32.Bc3 e4 (32...Kf8+–) 33.Ne7 Kh8 (33...Kf8 34.Bf6 gf6 35.Nbd5 ef3 36.Nf5 fg2 37.Nf6+–) 34.Nbd5 (34.Bf6 gf6 35.Nbd5 ef3 36.gf3 Kg7+–) 34...Nd5 35.Nd5 f5 (35...ef3 36.gf3 Kg8 37.e4+–) 36.fe4 fe4 37.Bd4 h5 (37...Nc1 38.Nc3+–) 38.Nc3 1–0. Blasig,Volker – Marchal, 1991.

6.Be2 c6 7.a4 cb5 8.ab5 Nf5 9.Nf3 Be7 10.0–0 0–0 11.Qc2 d5 12.Be5 dc4 13.Bc4 Bd6 14.Bd6 Nd6+/– 15.Bd3 Bd7 16.Nc3 Qc7 17.Ng5 g6?? 18.Qa4 a6 19.Qh4 Nf5?? 20.Bf5 Bf5 21.Nd5 Qd6 22.Nf6 Kg7 23.Nfe4 Be4 24.Qh7 Kf6 25.Ne4 Ke5 26.Nd6 Kd6 27.Qh4 Kc5 28.Qd4 Kb5 29.Rab1 (29.Rab1 Kc6 30.Rfc1#) 1–0. Commander – shosan, playchess.de, 2001.

6.Be2 c6 7.a4 Nf5 8.d4 ed4 9.ed4 d5 10.c5=.

6.Be2 c6 7.a4 Ng6 8.Nf3 (8.d4= e4 9.d5 cd5 10.cd5=) 8...Be7 9.d4 e4 10.Nfd2=.

6.Be2 c6 7.d4 Qa5 8.Bc3 Qc7 9.bc6 bc6 10.Nd2=.

6.Be2 g6 7.f4 Nd7 8.Nf3 Bg7 9.0–0 0–0 10.Nc3 ef4 11.ef4 Nf5 12.Re1 b6 13.d4 Nf6 14.Bd3 Bd7 15.Qd2 a6 16.a4 Re8 17.Re8 Qe8 18.Re1 Qf8 19.h3 Re8 20.Kh2 Re1+= 21.Qe1 ab5 22.ab5 Qe7 23.Qe7+/– Ne7 24.g4 h6 25.Kg3 Ne8 26.Ne2 f5 27.g5 hg5 28.fg5 Bh8 29.Nf4+/– Ng7 30.Bc1 Ne6+= 31.Ne6 Be6 32.d5 Bd7 33.Kf4 Kf7 34.Bd2 Bg7 35.Be1 Bb2 36.Bf2 Bg7 37.Bd4 Bd4 38.Nd4 Bc8 39.h4 Bd7 40.Be2. hertford – Berka (1945), ChessWorld.net, 2002.

6.Be2 Ng6 7.Nf3 b6 8.Nc3 Bb7 9.0–0 Be7 10.d4 ed4 (10...a6 11.de5 de5 12.Qb3+=) 11.Nd4 Qd7 (11...0–0 12.Nf5+=) 12.Bf3+/– Bf3 (12...Bf3 13.Qf3 0–0+/–). jaddwarrior (2150) – Sherlock1973 (1945), ChessWorld.net, 2013.

6.Be2 Ng6 7.Nf3 Be7 (7...e4 8.Nd4+=) 8.d4 ed4 (8...e4 9.Nfd2=) 9.Qd4 c5 10.Qd1 0–0 11.Nc3 b6 12.0–0 Bb7 13.Ng5 (13.Nd5 Nd5 14.cd5 Bf6=) 13...h6 14.Nf3 Qc7 15.Qc2 (15.Nd5 Nd5 16.cd5 a6+=) 15...Rad8 16.Bd3 (16.Qa4 d5 17.cd5 Nd5+=) 16...Bf3 (16...Ne5 17.Ne5 de5 18.Rfd1=) 17.gf3 d5 (17...Ne5 18.Kg2=) 18.Nd5 Nd5 19.cd5 Rd5 20.f4 (20.Be4 Rg5 21.Kh1 c4+=) 20...Rd6 21.Kh1 (21.Rfd1 Rfd8+=) 21...Qd7 22.Rg1?? (better is 22.Rfd1=) 22...Rd3–+ 23.Rg3 (23.Qc4 Qd5 24.Qd5 Rd5–+) 23...Rd8 (23...Qb5 24.f5 Bf6 25.Bf6 Qc6 26.Kg1 Qf6 27.Qd3 Qa1 28.Qf1 Qf1 29.Kf1–+) 24.h3 (24.a4 Rd2 25.Qc4 Qd3 26.Qd3 R8d3–+ (worse is 26...R2d3 27.f5 Rb3 28.Rb1–+)) 24...Qb5 25.Rag1 (25.Rb1 Qc6 26.Kg1 Qe6–+) 25...Qc6 (better is 25...Rd2 26.Qf5 Qb2 27.a4–+) 26.Kh2 c4 (26...Rd2 27.Qc3 Bf6 28.Qa3 Rb2 29.Qa7–+) 27.f5 Bd6 (27...Rd2 28.Qc3 Bf6 29.Qd2 Rd2 30.Bf6 Ra2 31.R1g2 Qf6 32.fg6 Rf2 33.gf7 Qf7 34.Rg7 Qg7 35.Rf2 Qe5 36.Kg2 Qe3 37.Rf3 Qg5 38.Kf1–+) 28.f4 Bf4! 29.ef4 (29.Bc3 Bg3 30.Rg3 Ne5 31.Rg7 Kg7 32.Be5 Kg8–+) 29...Rd2 Theme: Double Attack 30.R1g2 Rc2 31.Rc2 Rd3 (better is 31...Qe4 32.Rcg2 Qf5–+) 32.Rd3 Nf4 (32...Qe4 33.Rd8 Nf8 34.Rdd2–+) 33.Rg3 (33.Rd4 Qf3 34.Rdc4 Qh3 35.Kg1 Qf5–+) 33...f6 34.Bc1 Qe4 35.Rf2 Nh5 (35...Nd3 36.Re3 Qd4 37.Rfe2 Nc1 38.Re8 Kh7 39.R2e7 Qf2 40.Kh1 Qf5 41.Kg1 Na2 42.Re2–+) 36.Rg4 Qe5 37.Bf4 (37.Kg1 Qe1 38.Rf1 Qe2–+) 37...Nf4 (37...Qf5 38.Bg3 Qd3 39.Kg2–+) 38.Rff4 c3 39.Kh1 (39.Kg1 c2 40.Rc4 Qe1 41.Kg2 c1Q 42.Rc1 Qc1–+) 39...Qe3 (better is 39...c2!? 40.Rf1 Qc3 41.Re4–+) 40.Kg2 c2 (40...c2 41.Rc4 c1Q 42.Rc1 Qc1–+) 0–1. Dopper,Johan – Polderman,Kees, corr, 1991.

6.Nf3 a6 7.ba6 (7.a4 ab5 8.ab5 Ra1 9.Ba1 Ng6 10.d4=) 7...ba6 8.Nc3= Rb8 9.Rb1 Bf5 10.d3=.

6.Nf3 c6 7.a4 Bd7 8.Be2 Qa5 (8...e4 9.Nd4=) 9.0–0+= Ng6 10.Nc3 Qc7 11.h3 Be7 12.d3 (12.d4 0–0+=) 12...0–0= 13.Qc2 Rac8 14.d4 d5? (14...Rfe8 15.Rfd1=) 15.bc6 (15.de5 Ne8 16.cd5 Ne5 17.dc6 bc6+–) 15...bc6 (15...Bc6!? 16.Ne5 dc4 17.Nc4 Rfd8+/–) 16.de5+/– Ne5 (16...Ne8!?+/–) 17.Ne5+– Qe5 18.Nd5 Qe6 19.Ne7 (19.Nf6 Bf6 20.Bg4 Qe8 21.Bd7 Qd7 22.Bf6 gf6+–) 19...Qe7 20.Ba3 (20.Bd3 h6+–) 20...c5+/– 21.Bb2 Bc6 22.Bd3 Ne4 23.Be4 (23.f3!? Ng5 24.Rfe1+/–) 23...Be4 24.Qc3 Qg5 25.f3 Bf5 26.g4 Be6 (26...f6!?+=) 27.f4+/– Qf6 28.Qf6 gf6 29.Rfc1 (29.Bf6 Rc6+/–) 29...f5 30.gf5 Bf5 31.Kf2 Rfd8 32.Rg1 Kf8 33.h4?? (better is 33.Rg5 Rd2 34.Kf3+/–) 33...Rd2–+ (33...Rd2 34.Kf3 Rb2–+) 0–1. GuestFYNF – GuestLDZP, freechess.org, 2017.

6.Nf3 c6 7.a4 Bg4 8.Be2= g6 (8...a6 9.0–0=) 9.h3 Bf3 (9...Bf5 10.0–0=) 10.Bf3+= e4?? (10...Bg7 11.0–0+=) 11.Be2 (better is 11.Bf6 ef3 12.Bh8 fg2 13.Rg1+–) 11...Bg7+= 12.0–0 0–0 (12...d5 13.d3+=) 13.Qc2 (13.d3 d5+=) 13...d5 14.f3 (14.d3!?+=) 14...Nf5= 15.fe4 (15.Be5 Re8 16.fe4 de4+=) 15...Ne4 (15...Ng3 16.Re1 Ne2 17.Re2 de4 18.Bd4=) 16.Bg7 Kg7 17.cd5 (17.Bf3 Nfg3 18.Rc1 Ng5 19.Qb2 Kg8=) 17...cd5 (17...Nfg3 18.Nc3 cd5 19.Rfd1=) 18.Bf3 (18.Qb2 Qf6 19.Qf6 Nf6= (19...Kf6? 20.g4+–)) 18...Neg3 (18...Rc8 19.Qb2 Qf6 20.Qf6 Nf6 21.g4=) 19.Rc1 (19.Rf2 Re8+=) 19...Nh4 (19...d4 20.Qb2= (worse is 20.Bb7 Ne2 21.Kf2 Nc1 22.Qc1 Rb8–+)) 20.Qb2 (20.Qd1!?+=) 20...Kg8= 21.Kf2 Qg5 (21...Nf3 22.Kg3 Nh4 23.Kh2+=) 22.Qd4 Exerts pressure on the isolated pawn 22...Nf3 23.Kf3? (better is 23.gf3 Nf5 24.Qg4= (24.Qd5?? Qg3 25.Ke2 Rad8–+)) 23...f5?? (23...Ne4 24.g4 Qh4–+) 24.Qd5 (better is 24.h4 Qe7 25.Qd5 Rf7 26.Kg3+–) 24...Rf7+/– 25.Rc7 Raf8 26.Rf7 (26.Kf2!?+=) 26...Rf7= 27.Nc3 Nh5 (better is 27...Ne4!? 28.Ne4 fe4 29.Ke4 Qg2 30.Ke5 Qh3=) 28.Ke2 (28.Qe5 Qh4+/–) 28...Ng3 (28...Qe7 29.Kf1+/–) 29.Kd3 (29.Kd1 Qf6+/–) 29...Kg7 (29...Qh4 30.b6 ab6 31.Rb1+=) 30.Qd4 Kg8 31.Qd5 (31.Rc1 Qe7+/–) 31...Qe7 (31...Kg7!?=) 32.Rc1+= f4 (32...h6!?+=) 33.ef4 Kf8? (33...Nh5 34.Rf1+/–) 34.Qd4 (better is 34.Qe5!? Qe5 35.fe5 Rd7 36.Kc2 Ke7+–) 34...Nf5?? (better is 34...Kg8+–) 35.Qh8 1–0. GuestWYFC – GuestTBGH, freechess.org, 2017.

6.Nf3 c6 7.a4 Ng6 8.Nc3=.

6.Nf3 c6 7.Be2 e4 8.Nd4 d5=.

6.Nf3 e4 7.Bf6 gf6 8.Nd4 =+.

6.Nf3 Bg4 7.Be2 Ng6 8.0–0 Be7 9.h3 Bf3 10.Bf3 e4 11.Be2 0–0 12.d3 ed3 13.Bd3 Ne5 14.Be2 Ng6 15.Nd2 Re8 16.Bf3 Rb8 17.Qc2 Ne5 18.Rfd1 Nf3 19.Nf3 (worse is 19.gf3 Qd7 20.Kg2 a6+=) 19...h6 20.a4 Bf8 21.Nd4 Ne4 22.f3 Ng3 23.e4 Qg5 24.Bc1 Qg6 25.Ne2 d5 (better is 25...f5!? 26.Nf4 Qf6=) 26.cd5+/– Bc5 27.Qc5 Ne2 28.Kf2 (28.Kh1 f5 29.ef5 Qf6+–) 28...Nc1? (better is 28...Qf6 29.Be3 Nc3 30.Qc7 Nd1 31.Rd1 Qb2 32.Rd2 Qb4+/–) 29.Rac1+– (29.Qc1?! Qd6+/–) 29...Rbc8 30.Qd4 (30.Qa7 Ra8 31.Qb7 Ra4+–) 30...Qg5? (30...a6 31.Kg1+–) 31.Rc4 Qh4 32.Kf1 b6 33.Qf2 Qf6 34.Rdc1 Qd6 35.Kg1 Qe5 36.Qc2 Kf8 37.Rc7 Rc7 38.Qc7 Qd4 39.Kh1 1–0. Van Esbroeck,Dirk – Pons,Francisco, 34. LSS No Engine Cup Preliminary, 2011.

6.Nf3 g6 7.d4= Nd7 (7...e4!? 8.Nfd2 Bg7=) 8.Bd3 Bg7 9.0–0 ed4 (9...f5 10.c5+=) 10.ed4 (10.Re1 0–0 11.ed4 d5+=) 10...0–0+= 11.Re1 Nc5 (11...d5 12.Ne5+=) 12.Bc2 (12.Nc3 Nd3 13.Qd3 Bf5=) 12...d5 (12...Bg4 A) worse is 13.dc5 Bb2 14.cd6 A1) 14...Ba1? 15.de7 Qd1 16.ef8Q (worse is 16.Bd1 Rfe8–/+; 16.Rd1 Rfe8+=) 16...Kf8 17.Bd1+–; A2) 14...Nc8–/+; B) 13.h3 Bh5 B1) 14.dc5 Bb2 15.cd6 B11) 15...Ba1 16.de7 Qd1 17.ef8Q (17.Rd1?! Rfe8 18.g4 Bg4 19.hg4 Re7+/–; 17.Bd1?! Rfe8+/–; worse is 17.ef8R Kf8 18.Bd1 Re8 19.Re8 Ke8+–) 17...Kf8 18.Bd1+–; B12) 15...Nc8–/+; B2) 14.g4 Bg4 15.hg4+–) 13.Ba3+/– (worse is 13.dc5 Bb2 14.Nbd2 Ba1 15.Qa1 Re8–/+) 13...b6 (13...Ne6 14.cd5 Nd5 15.Bf8 Qf8+–) 14.Ne5 (14.dc5?! Ba1 15.cb6 Re8 16.Be7 Re7 17.Re7 Qe7 18.Qd5 c6 19.Qc6 Bb7+=) 14...Re8?? (better is 14...Ne6 15.cd5 Nf4+–) 15.dc5+– (15.dc5 dc4 16.Qd8 Rd8 17.cb6 ab6 18.Be7+–) 1–0. Dopper,Johan – Ciro Sanchez,Jose, 1994.

6.g3 Bd7 7.Bg2 c6 8.a4 g6 9.Ne2 Bg7 10.0–0 0–0 11.d3 Qc8 12.Nd2 Be6 13.d4 Nf5 14.de5 Nd7 15.Qc2 de5= 16.Ne4 Qc7 17.bc6 bc6 18.Ba3 c5 19.Rab1 Rfb8 20.Ng5+/– Rb1 21.Rb1 Rb8 22.Ne6 fe6 23.Rb8 Qb8 24.Bc6 Qc7 25.Bd7+/– Qd7 26.Bc5 Qc7 27.Ba3 Bf8 28.Bf8 Kf8 29.Qb3 Kf7 30.Nc3+– Nd6 31.Nb5 Qc5 32.Nd6 Qd6 33.Qb7 Qe7 34.Qb5 Qc7 35.c5 Ke7 36.a5 Kd8 37.a6 Ke7 38.Qb7 Kd7 39.Kf1 Kd8 40.c6 Qc8?? 41.Ke2 Qc7 42.Kf3 h5 43.h4 Qc8 44.Ke4 Qc7 45.f3 Qd6 46.Qd7! Qd7 47.cd7 Kd7 48.Ke5 Ke7 49.g4 (49.g4 g5 50.gh5 (50.hg5?? h4–+) 50...gh4 51.Kf4+–) 1–0. hal1958 – rodgerl, playchess.de, 2002.

6.Nf3 Ng6

7.d4 Bg4 8.Be2 Be7 (8...e4 9.Nfd2 Be2 10.Qe2=) 9.0–0 (9.de5 de5 10.Qd8 Rd8 11.Ne5 Bb4 12.Kf1 Be6+/–) 9...Bf3 (9...e4 10.Nfd2 Be2 11.Qe2+=) 10.Bf3+= e4 11.Be2 0–0 12.Nc3 c6 13.f3 d5 14.fe4 Ne4 15.bc6 bc6 16.cd5 cd5 17.Ne4 de4 18.Bc4 Rb8 19.Rb1 Bg5 (19...Bd6!? 20.Qh5 Qc7+=) 20.Ba3+/– Be3 21.Kh1 Rb1 22.Qb1 Qd4? (better is 22...Qc8 23.Bb3 Rd8 24.Bf7 Kh8 25.Bg6 hg6 26.Qe4 Bd4+/–) 23.Bf7+– Rf7 (23...Kh8 24.Bf8 Nf8+–) 24.Qb8 1–0. pcmvr (2745) – attasantotjia (2305), net–chess.com, 2007.

7.Be2 Be7 8.0–0 0–0 9.d4 (9.Qc2 c6 10.d4 (10.bc6 bc6 11.Nc3 Rb8 12.d4 e4 13.Nd2 d5 14.Rab1=; 10.Nc3 cb5 11.cb5 d5 12.d4 e4 13.Ne5 Bf5 14.Rac1=) 10...e4 11.Nfd2 d5 12.bc6 bc6 13.Ba3 Bg4 14.Be7=) 9...ed4 (9...e4 10.Nfd2 c6 11.d5 cb5 12.cb5 Nd5 13.Ne4 Nf6 14.Nbc3+=) 10.Bd4 Nd7 (10...Re8 11.Nc3 a6 12.Qc2 Be6 13.Rfd1 ab5 14.cb5+=) 11.Nbd2 (11.Nc3 c5 12.bc6 bc6 13.Ne4 Nde5 14.Qc2+=) 11...Bf6 (11...Re8 12.Ne4 Nde5 13.c5 Bf5 14.cd6=) 12.Nb3 (12.Bd3 Nc5 13.Ne4 Bd4 14.ed4=) 12...Bd4 (12...Re8 13.Rc1 a6 14.Qc2=) 13.Nfd4 (13.Qd4 Qe7 14.Rfc1+=) 13...Re8 (13...Qf6 14.Qc2+=) 14.Qc2 Nde5 15.Rad1 Qg5? (better is 15...a6!?+=) 16.f4+– Qh6 17.fe5 Qe3 18.Kh1 Re5 (18...de5 19.Rf3 Qg5 20.Rg3+/–) 19.Qd3 (19.c5 dc5 20.Nc5 Qg5+–) 19...Qh6 (19...Qd3!? 20.Bd3 Bg4+/–) 20.Qf3+– f6 21.Rde1 Nh4 22.Qf2 Ng2? (better is 22...Bd7+–) 23.Qg2 (23.Kg2?! Bh3 24.Kh1 Bf1 25.Rf1 Qe3+–) 23...Rg5 24.Qf2 Bh3 25.Rg1 Re5 (25...Rg1 26.Qg1 a6 27.Bf3 ab5 28.Nb5+–) 26.Bf3 Rae8 27.Bd5 Kh8 28.Re5 (28.Bb7 Re1 29.Re1 Re1 30.Qe1 Qh5+–) 28...Re5 (28...fe5 29.Qf7 Rb8 30.Nf3+–) 29.Re1 1–0. Larsen,Andreas – Rasmussen,Egil, Alta, 2004.

7.Be2 Be7 8.0–0 a6 A) 9.ba6 A1) 9...Ra6 10.d4 (10.Nc3 0–0 11.Qc2 Bg4 12.Rfd1 Re8 13.d4 Qc8 14.de5=) 10...e4 11.Nfd2 Bf5 12.Nc3 Qd7 13.Qc2 0–0 14.Nde4+/–; A2) 9...ba6 10.Nc3 Rb8 11.Rb1 c6 12.Qa4 Rb6 13.Ba3 0–0 14.Rb6=; B) 9.Qc2 Bg4 10.h3 Be6 11.d4 ed4 12.Bd4 0–0 13.Rd1 Re8 14.Nc3+=.

7.Be2 Be7 8.0–0 Bf5 9.d4 e4 10.Nfd2 Qd7 11.Nc3 Nh4 12.g3 Ng6 13.Qc2 c6 14.bc6+=.

7.Be2 Be7 8.Nc3 0–0 9.Qc2 Bd7 10.d4 ed4 11.Nd4 Qc8 12.Bd3 Ne5 13.0–0–0 (13.0–0!?=) 13...Nd3 14.Qd3 Ng4 15.Rdf1 (15.Nd5 Re8 16.Qc3 Bf6+= (16...Nf2?? 17.Nf5 Bf6 18.Nf6 Kh8 19.Nh6+–)) 15...Ne5–/+ 16.Qc2 Bf6 (16...c6 17.Nce2–/+) 17.Nd5+= Bd8 18.Nf3 (18.f4 Ng4+=) 18...c6–/+ 19.bc6 bc6 (19...Nc6?! 20.Ba3=) 20.Nf4 f6 21.Ba3 (21.Rd1 Bc7–/+) 21...Bc7 22.Rd1 (better is 22.Qa4–/+) 22...c5 (better is 22...Qa6 23.Bb4 Rab8–+ (23...Nc4 24.Rd4 Ne5 25.Qb3 Nf7 26.Qc4 Qc4 27.Rc4–+)) 23.Nd5+= Bd8 24.Bb2 Qa6 The isolani on c4 becomes a target 25.Be5 Ba4 (25...fe5 26.Rd2 Rb8–+) 26.Qe4? (26.Nf6 gf6 27.Rd6 Bc2 28.Ra6 fe5 29.Kc2+/–) 26...Bd1–+ (26...fe5?! 27.Rd2+=; 26...de5?! 27.Rd2+=) 27.Bd6 (better is 27.Rd1 de5 28.Qc2–+) 27...Qd6 (better is 27...Bf3 28.Qe6 Kh8 29.gf3 Rb8–+) 28.Rd1–/+ Qa6 29.Nb4?? (better is 29.Rd2–/+) 29...Qa3–+ (29...cb4?! 30.Qa8 Qa3 31.Kd2 Qc3 32.Ke2 Qc4 33.Ke1 Qc3 34.Nd2=) 30.Kc2 Rb8 (30...Qb4?! 31.Qa8 Qc4 32.Kb1 Qb4 33.Kc1 Qa3 34.Kb1+=; 30...cb4?! 31.Qd5 Rf7 32.Qa8 Qa2 33.Kc1 Qc4 34.Kd2 Rd7 35.Nd4–/+) 31.Rd3 (31.Qd5 Kh8 32.Qc5 Ba5–+ (32...Qb4?! 33.Qb4 Rb4 34.Kc3–+)) 31...Qb4 32.Rb3 Qa4 33.Qd5 Rf7 (33...Kh8 34.Kb2 Be7 35.Qe6–+) 34.Kc1 Rb3 (better is 34...Bb6 35.Kb2 Qe8–+) 35.Qd8 Rf8 Do you see the mate threat? 36.Qd5 Kh8 37.ab3 Qb3 38.Nd2 (38.Kd2 Qb6 39.Ke2 Rd8–+) 38...Qb6 39.Ne4 (39.Qf5 Rd8–+) 39...Rb8 (better is 39...Rd8 40.Qc5 Qb3–+) 40.Kc2 (40.Qd3 a5–+) 40...Qb3 (40...Qb1 41.Kc3 Rb3 42.Kd2 Rb2 43.Kc3 Qc2) 41.Kd2–+ Qa2 42.Kd3 Qb1 (better is 42...a6!?–+) 43.Ke2–/+ Qb6 44.Nd6 Threatening mate: Nf7 44...g6 (better is 44...h6!?–/+) 45.Qe6+= Qb2 46.Kf3 f5 (46...a6+=) 47.Ne8 (47.Qe7 Qg7 48.Nf7 Kg8 49.Nh6 Qh6 50.Qe6 Kf8 51.Qd6 Kf7 52.Qc7 Ke6 53.Qc6 Ke7 54.Qc7 Kf6 55.Qd6 Kg7 56.Qe5 Kf7 57.Qc7 Kf6 58.Qd6 Kg7 59.Qe7 Kg8 60.Qe6 Kg7 61.Qe7 Kg8=) 47...Qb7 (better is 47...a5!?–/+) 48.Kg3+= Qb2?? (48...Ra8+=) 49.Kf3?? (better is 49.Qe7 f4 50.ef4 Qa3 51.Kg4 Re8 52.Qe8 Kg7 53.Qe7 Kg8 54.Kg5+–) 49...a5 50.Kg3 a4?? (50...Rd8 51.Kh3=) 51.Kh3 (better is 51.Qe7!? Re8 52.Qe8 Kg7 53.Qa4 Qe5 54.Kh3+/–) 51...a3 (51...Rb7!?+=) 52.Qf7= Do you see the mate threat? 52...Re8 53.Qe8 Kg7 54.Qe7 Kh6 55.Qh4 (55.Qc5?? a2 56.Qf8 Qg7–+) 55...Kg7 56.Qe7 ½–½. Loebel,Carsten – Porth,Oliver, Bargteheide op, 1988.

7.Be2 Be7 8.d4 e4 9.Nfd2 d5 10.0–0+=.

7.h3 Be7 8.d3 0–0 9.Qc2 d5 (9...c6!?+=) 10.Nbd2 (10.Ne5 Ne5 11.Be5 Bb4 12.Nd2 dc4 13.Qc4 c5+=) 10...Bf5 (better is 10...Qd6=) 11.e4?? (better is 11.cd5 Bd7 12.Ne5 Bb5 13.Ng6 fg6 14.e4+/–) 11...de4–+ 12.de4 Be6?? (better is 12...Ne4 13.Qb3 Bc5 14.Ne4 Be4–+) 13.Ne5+= (13.Be5? Ne5 14.Be2 Nf3 15.Nf3 Bb4 16.Kf1 Nd7–+) 13...Ne5 14.Be5 Bb4 15.Bd3 Qd7 (15...Nd7 16.Bc3 Nc5 17.Be2 Bc3 18.Qc3+=) 16.Rd1 (16.Bf6!? gf6 17.Rb1+/–) 16...Rad8 17.0–0?? (better is 17.Ke2+=) 17...Qd3–+ 18.Qa4 (18.Qd3 Rd3 19.Bf6 Rd2 20.Rd2 Bd2 21.Rd1–+) 18...Bd2 19.Bf4 (19.Bc7 Rd7 20.e5 Ne4–+) 19...Ne4 20.Rd2 (20.Bd2 Nd2 21.Rfe1 Qc4 22.Qc4 Nc4–+) 20...Nd2 21.Rd1 (21.Bd2 Qd2 22.a3 Qg5–+) 21...Nf3! (21...Nf3 22.gf3 Qd1 23.Qd1 Rd1 24.Kg2 Bc4 25.Bc7 Rc8–+) 0–1. GuestJXXJ – GuestTPPL, freechess.org, 2017.

5.d4 ed4

6.ed4 Bd7 7.Nf3 Ng6 8.Be2 Nf6 9.0–0 Be7 10.Re1 0–0 11.d5 Nf4 12.Bc4 c6 13.bc6 bc6 14.dc6 Bc6 15.Bc1 Ng6 16.Nd4 Bd7 17.Bd3 Re8 18.Nc3 Ne5 19.Rb1 Nd3 20.Qd3 Rc8 21.Rb7 Ra8 22.Be3 a6 23.Nf5 Bf8 (23...Qa5 24.Ng3=) 24.Nd6+= Bd6 25.Qd6 Be6 26.Qd8 Red8 27.Rc7 Nd5 28.Nd5 Bd5 29.c4 Be6 30.a3 Rdc8 31.Rc8 Rc8 32.c5 Rc6 33.Rb1 h6 34.Bd4 Kh7 35.Rb6 Bd5 36.f3 g5 37.Rc6 Bc6 38.Kf2 f5 39.h3 Kg6 40.Be5 h5 41.Bd6 Kf6 42.Ke3 Ke6 43.g4 hg4 44.hg4 f4 45.Kf2 Kd5? (better is 45...Kf7+/–) 46.Be7+– Kc4 47.Bg5 Kc5 48.Bf4 Kd5 49.Ke3 Ke6 50.Bg5 Kf7 (50...Ba4 51.f4 Bd1 52.f5 Ke5 53.f6+–) 51.f4 Kg6 52.Be7 (better is 52.Bh4!? Bd7 53.f5 Kf7+–) 52...Bd7 53.g5 Kf7 54.Bd6 Bf5 55.Kd4 Kg6 56.Kd5 Kf7 57.a4 Kg6 58.Be5 (58.Be5 Bc2 59.a5+–) 1–0. b4_player (2275) – nisked (1705), GameColony.com, 2003.

6.Qd4 Nf5 7.Qd2 =.

6.Qd4 Nf5 7.Qe4 Be7 (7...Nge7 8.c4=) 8.Bc4+= Nf6 (better is 8...Kf8+=) 9.Qf3?? (better is 9.Bf6 gf6 10.Bd5+/–) 9...d5 (9...Nh4 10.Qe2 d5 11.Bd3 Ng2 12.Kd1–/+) 10.Bb3 (10.Bd3 Nh4 11.Qg3 Nh5=) 10...Qd6 11.Nc3 Be6 (11...d4 12.ed4 Nd4 13.Qe3+=) 12.a4 (12.g4 Nh4 13.Qg3 d4 (13...Ng4 14.Nd5 Bd5 15.Qd6 Ng2 16.Ke2 Bc4 17.Bc4 cd6 18.Bd5+–) 14.ed4 Ng4=) 12...c6 (12...0–0–0 13.Nge2–/+) 13.Ba3 (13.Nge2 Nh4 14.Qg3 Qg3 15.hg3 Nf5+= (worse is 15...Ng2 16.Kf1+=)) 13...Qc7 14.bc6 (14.Be7!? Qe7 15.bc6 bc6 16.Rb1+=) 14...Qc6 (14...bc6?! 15.Be7 Qe7 16.Nge2+=) 15.Nge2 Ba3 (better is 15...Nh4!? 16.Qg3 Nh5–/+) 16.Ra3+= Qc5 (better is 16...Qd6 17.Nb5 Qe7+=) 17.Nd5?? (better is 17.Ra2=) 17...Qa3 (better is 17...Bd5!? 18.Bd5 Qa3 19.0–0–+) 18.Nf6 gf6 19.0–0 Rg8 (better is 19...Qe7!? 20.Nd4 Nd4 21.ed4–+) 20.Qb7 (20.Qb7 Rd8 21.Nf4–+) 1–0. b4_player (1880) – rraman (1715), GameColony.com, 2002.

6.Qd4 Nf5 7.Qe4 Be7 8.Bc4 Nf6 9.Bf6 gf6 10.Bd5 c6? (better is 10...Rb8+/–) 11.bc6+– (11.bc6 Rb8 12.cb7 Qa5 13.c3+–) 1–0. Trkn – guest1067, ICC, 2004.

6.Qd4 Nf5 7.Qe4 Nge7 8.c4 =.

6.Qd4 Nf6 7.Qf4 (7.Bd3 Be6=) 7...Qd7 (7...Ned5!? 8.Qg3 Ne4=+) 8.Bf6+= gf6 9.Qf6 Rg8 10.Nd2?? (10.c3 Bg7 11.Qf3 d5+=) 10...Qf5 (better is 10...Bg7 11.Ne4 Qd8–+) 11.Qh4 (11.Qf5 Bf5 12.0–0–0 Bg7+=) 11...Nd5 (better is 11...Rg4!? 12.Qh3 Qc2=+) 12.Bd3 (12.e4 Qe5 13.Rc1 Nc3=) 12...Qe5 13.Rd1 (13.Qd4 Qd4 14.ed4 Rg2+=) 13...Be7 (13...Nc3 A) 14.Bh7? Rg4 (14...Rg2?! 15.Ngf3 Qb5 16.Bd3–+) 15.Qh3 Nd1–+; B) 14.Qh7 Rg7 (< 14...Rg2 15.Ra1=) 15.Ngf3 Qe6–/+; C) 14.Ngf3 Qh8 15.Rc1= (15.Bh7 Rg4 16.Qh5 Nd1–+)) 14.Qh6 (14.Qh7 Nf6 15.Qh4 Rg2+=) 14...Rg2= 15.Ne4 (15…Bg4 16.Ne2=+; 15.Qh7 Ne3 16.Ngf3=+). Niekisch,Dirk – Schellenberger,Steffen, SJRH–ch U17 Worms, 1996.

6.Bd4 a6 =.

6.Bd4 c6 7.Bd3 a6 8.ba6+= ba6 9.Nf3 Nf6 (9...Nf5 10.0–0+=) 10.Bf6 gf6 11.0–0 d5 (11...Bg7 12.Na3+=) 12.Re1 (12.Nbd2 Ng6+/–) 12...c5 (12...Bg7 13.c3+=) 13.c4 Nc6 (13...dc4!? 14.Bc4 Qd1 15.Rd1 Bb7+/–) 14.Qa4 Bd7 15.cd5 Ne5 16.Qe4 (16.Qd1 Bd6 17.Na3 Bg4+–) 16...Bd6 (16...Bg7 17.Ne5 fe5 18.Be2+/–) 17.Nh4 0–0?? (better is 17...Rb8 18.Nd2 Rb4+/–) 18.Qh7 1–0. lucya (2115) – BONOTTS, GameColony.com, 2002.

6.Bd4 c6 7.Bd3 Nf5 8.Bc3 =.

6.Bd4 Nf5 7.Bc3 =.

6.ed4 Nf6

7.Bc4 d5 8.Bd3=.

7.Bc4 g6 8.Nf3 (8.d5 Bg7=) 8...Bg7 (8...d5 9.Bd3=) 9.0–0 (9.d5 0–0 10.0–0 c6 11.dc6 bc6=) 9...0–0 (9...d5 10.Be2=) 10.Nc3 (10.d5+=) 10...Be6 (better is 10...d5!? 11.Be2 Re8=) 11.Be6+/– fe6 12.Ng5 Qd7 13.Re1 Ng4?? (better is 13...d5+/–) 14.Qg4+– 1–0. Wall,Bill – Coy,Steven, internet, 2003.

7.Bc4 Ng6!?=+.

7.Bd3 a6=.

7.Bd3 Ned5=.

5.d4 e4

6.d5 Bd7 7.c4 a6 8.ba6 ba6 9.Nd2 f5 10.Ne2 Nf6 11.Bf6 gf6 12.Nf4 Bh6?? (better is 12...h5+/–) 13.Qh5+– (13...Ng6 14.Qh6 Nf4 15.Qf4+–) 1–0. Marre – gosc, zagraj.pl, 2003.

5.d4 Ng6

6.de5 Ne5 7.Be5 de5 8.Qd8 Kd8 9.Nf3 f6 (9...Bd6 10.Nc3=) 10.Nbd2 Bb4 (10...a6 11.ba6 ba6 12.Rb1=) 11.a3 Bd2 (11...Be7 12.Bc4=) 12.Kd2 (12.Nd2 a6=) 12...Be6 (12...Bg4 13.Bd3=) 13.Bd3+= Ke7 14.Rad1 (14.Rhd1 Bd5+=) 14...g6 (14...Rd8 15.Ke2=) 15.Kc3 Nh6 (15...c6 16.bc6 Rc8 17.h3=) 16.Be4 Rab8 17.h3 (17.Rd2 Nf7 18.Bd3 Nd6+=) 17...Nf5 18.Bf5 Bf5 19.Rhe1 (19.Nd2 c6 20.e4 Be6+=) 19...Rhd8 20.g4 Be4 (20...Be6 21.e4=) 21.Nd2 Bd5 22.e4 Be6 23.Nc4 (23.Nb3 c6=) 23...Rd1 (23...h5 24.gh5 gh5 25.h4=) 24.Rd1 Bc4 (24...h5 25.Ne3=) 25.Kc4 b6 (25...Rc8 26.Kb3=) 26.h4 (26.c3+=) 26...Rd8 (better is 26...Rc8+=) 27.Rd8+– Kd8 28.Kd5 h6? (better is 28...Kd7+–) 29.Ke6 (29.Ke6 g5 30.hg5 fg5 31.Ke5+–) 1–0. mrkt (2335) – steve_wpb (2000), ICC, 2003.

6.Nf3 e4 7.Nfd2 d5 8.f3 (8.c4!?=) 8...ef3 (8...Bd6 9.c4 (9.fe4?? Qh4 10.Ke2 Bg4 11.Nf3 de4–+) 9...Qh4 10.Ke2 ef3 11.gf3+=) 9.Nf3 (9.Qf3 Nf6+=) 9...Nf6 10.Be2 Bd6 11.0–0 0–0 12.Ne5 (12.c4!?+=) 12...Qe8 13.Ng6 Qe3 14.Kh1 hg6 (better is 14...fg6 15.Bc1 Qe7–/+) 15.Qd3? (better is 15.Bc1!? Qe6 16.Ba3–/+) 15...Qh6–+ 16.c4?? (16.g3 Bf5 17.Qd2–+) 16...Qh2 0–1. ronnieg (2545) – Ivanciuccio (2785), freechess.org, 2001.

5.Nf3 Nf6

6.c4 e4 7.Bf6 gf6 8.Nd4=.

6.c4 Bf5 7.Be2= c6 8.a4 Ng6 9.0–0 Be7 10.d3 0–0 11.Nbd2 e4 (11...Bg4!?=) 12.de4+/– Be4 13.Ne4 Ne4 14.Bd3 (14.Nd4 Rc8+/–) 14...Ng5 (14...Nc5 15.Bf5+=) 15.Ng5 Bg5 16.Bg6 (16.Qf3!?+/–) 16...fg6+= 17.Re1 Qc7 18.f4 (18.Qg4 Bf6 19.Rab1 Rae8+=) 18...Bf6 19.Ra2 Qd8 (19...a6 20.Qd2=) 20.e4 (20.Ba3!? Bh4 21.g3+=) 20...Bb2= 21.Rb2 Rf4 22.Rbe2 (22.Rd2!? Qe7 23.Rd6 Re4 24.Re4 Qe4 25.Rd7+=) 22...Qb6–/+ 23.Re3 (23.Kh1 Qc5 24.bc6 bc6 25.e5 de5 26.Re5 Qc4 27.Re8 Re8 28.Re8 Rf8 29.Rf8 Kf8 30.Qd6 Kf7 31.Qd7 Kf6 32.Qa7 Qf1 33.Qg1 Qg1 34.Kg1–+) 23...Re4–+ 24.Qd3 (24.Qc1 Qc5 25.bc6 bc6–+) 24...Rae8 25.Kf2 Re3 (25...Qc5 26.bc6 bc6 27.g3–+) 26.Re3 Re3 27.Qe3 Qe3 28.Ke3 Kf7 29.Kd4 Ke6 30.bc6 bc6 31.g4 h5 32.h3 (32.a5 c5 33.Ke4 hg4–+) 32...hg4 33.hg4 Kf6 34.c5 d5 35.Kc3 (35.a5 Kg5 36.Ke5 a6–+) 35...Ke5 36.Kd3 (36.g5 Kf4–+) 36...Kf4 37.g5 a5 38.Ke2 Ke4 39.Ke1 Ke3 40.Kd1 Kd3 41.Ke1 Kc2 42.Ke2 Kb3 0–1. Berndt – Giering, Eintracht, 1999.

6.Be2 a6=.

6.c4 a6

7.a4 ab5 8.ab5 Ra1 9.Ba1 b6 10.Be2 Bb7 11.0–0 Ng6 12.Nc3 Be7 13.Qa4 Qa8 14.Qa8 Ba8 15.Bb2 Bb7 16.Ra1 0–0 (16...Kd7!?+=) 17.Ra7+/– Rb8 18.d3 Bd8 19.Nd2 Ra8?? (better is 19...Kf8+/–) 20.Rb7+– Nd7 21.d4 f5 22.g3 Ne7 23.Nb3 Nf8 24.de5 de5 25.c5 Nd7 26.c6 Nf6 27.Bc4 Kf8 28.Nc1 (28.Nd1 Ng6 29.f4 ef4 30.ef4 Ne4+–) 28...e4 29.N1a2 (29.N3e2 Ne8 30.Be5 Nc8+–) 29...g6 (29...Ne8 30.Be6+–) 30.Nb4 Ra5 (30...Ne8 31.Na6 Nd6+–) 31.Rb8 Ke8 32.Na6 Ned5 (32...Nc6 33.bc6 Ke7 34.Nb4+–) 33.Nd5 Nd5 34.Bd5 (34.Bd5 Ke7 35.Rd8 Kd8 36.Bf6 Ke8 37.Nc7 Kf8 38.Ne6 Kf7 39.c7+–) 1–0. Fournier,Frederic (1860) – Lambrescak,Philippe (1620), Ch Oise, 2004.

7.a4 ab5 8.ab5 Ra1 9.Ba1 g6 (9...e4 10.Bf6 gf6 11.Nd4=) 10.Be2 Bg7 11.0–0 (11.d4 e4 12.Nfd2 Bf5+=) 11...0–0 (11...e4 12.Ng5 d5 13.f3=) 12.d3 (12.d4 e4 13.Nfd2 Nf5=) 12...c6 (12...Bg4 13.Nbd2=) 13.Nc3 Bd7 (13...Bg4 14.d4+=) 14.Qb3 (14.d4 ed4 15.Qd4 Bf5+=) 14...cb5 (14...Qb6 15.Bb2=) 15.Nb5+= Qb6 16.Rb1 Ra8 17.Bc3 h6 (17...Qc6 18.Nd2+=) 18.Nd2 Ne8 (18...Ra6 19.Bf3+=) 19.Ne4+/– Bb5 20.Qb5 Qb5 21.Rb5 (21.cb5?! f5 22.Ng3 f4=) 21...f5 (21...Ra7 22.Ng3+=) 22.Ng3 (22.Rb7 Kf7 23.Ng3 Ke6+/–) 22...Ra7+= 23.Ba5 (23.Bf3!?+=) 23...Nc6= 24.Bb6 Ra8 (24...Ra1 25.Nf1=) 25.h3+= Kf7 26.Bf3 Ke6 (26...Ra3 27.Bd5 Kf8 28.e4=) 27.Bd5 White fights for the Initiative 27...Kd7 28.Bf7 f4 (28...Ne7 29.Kf1+=) 29.Ne4 Nc7 (29...Ne7 30.ef4 ef4 31.c5+=) 30.Bc7+/– Kc7 31.Bg6 Ra1 (31...Ne7 32.Bf7+/–) 32.Kh2 fe3 33.fe3 Re1 (33...Ne7 34.Bf7+/–) 34.Ng3 Ne7 35.Be4 b6 36.Rb2 (better is 36.Nh5!? Bh8 37.Kg3+/–) 36...Bf6+/– 37.Ra2 Bg5 38.Ra7 Kd8 39.Nf5 (39.Nh5 Rf1+/–) 39...Nf5+= 40.Bf5 Be3 41.Rd7 Ke8 (41...Kc8 42.Rf7 Kd8 43.h4+=) 42.Rd6 Bf4 43.g3 Re2 44.Kh1 Bg3 45.Rb6 (45.Rh6 Rf2 46.Rg6 Rf5 47.Rg3 Ke7+/–) 45...Rh2+= 46.Kg1 Bf2 47.Kh2 Bb6 48.Kg3 Kf7 49.Kf3 Kf6 50.Ke4 Bd4 (50...h5 51.Bd7+=) 51.Bg4+/– Bc3 52.Kd5 Ke7 53.Kc6 (53.c5 Bb4+/–) 53...Bb4 (53...Bd4 54.c5+/–) 54.c5 Kd8 55.Kd6 (55.Kb6 Bc3+/–) 55...Ba3 56.Ke5 (56.Be6 Ke8+/–) 56...Bc5 57.d4 (57.Bf3!?+/–) 57...Bf8 (better is 57...Bd4!? 58.Kd5 Bc3=) 58.Ke6+/– ½–½. Cortes Lloveras,Enrique – Penalver Guardia,Josep, Sant Marti op 5th, 2003.

7.a4 e4 8.Nd4+=.

7.c5 dc5 8.ba6 b6 9.Ne5+=.

7.c5 e4 8.Ng5 d5+=.

5.Nf3 Ng6

6.a4 Rb8 (6...Be7 7.Be2 Nf6 8.0–0 0–0 9.c4 a6=; 6...a6 7.Nc3 ab5 8.ab5 Ra1 9.Qa1 Nf6=; 6...a5 7.Be2 e4 8.Nd4 Qg5 9.g3 Nf6=; 6...e4 7.Nd4 Nf6 8.Be2 d5 9.Nc3 Bc5=; 6...c5 7.e4 f5 8.ef5 Bf5 9.a5 e4=; 6...Bg4 7.h3 Bc8 8.Nc3 Nf6 9.Bd3 a6=; 6...Nh6 7.Bd3 f5 8.Be2 e4 9.Nd4 f4=; 6...Bd7 7.a5 a6 8.ba6 ba6 9.Bd3 Nf6=; 6...Nf6 7.Be2 Be7 8.0–0 0–0 9.a5 a6=) 7.a5 Nf6 8.Be2 a6 9.0–0 ab5 +=.

6.c4 Nf6 7.Be2 Bd7 8.Nc3 Be7 9.d3 Ng4 10.h3 Nf2?? (better is 10...Nf6=) 11.Kf2+– Nh4 (11...a6 12.Rf1+–) 12.g3 Nf5 13.Ne4 (13.e4 Nh6+–) 13...c6 14.h4 (14.d4 d5 15.Nc3 dc4 16.Bc4 cb5 17.Nb5 a6 18.Ne5 Bb5 19.Bf7 Kf8+–) 14...d5 (14...cb5 15.d4 bc4 16.Bc4+/–) 15.Neg5 (15.Ned2 f6+–) 15...f6+/– 16.g4 (16.Nh3 Qb6 17.d4 dc4 18.Bc4 Nd6+=) 16...Ne3?? (better is 16...Nh6 17.Ne5 fe5 (17...fg5? 18.Nd7 Qd7 19.Bg7+–) 18.Be5 0–0 (worse is 18...Bg5 19.hg5 Qg5 20.Bf4=) 19.Kg1 Ng4 20.Bg4 Bg5 21.hg5 Qg5+=) 17.Ke3+– fg5 18.Be5 Qb6 (18...cb5 19.Bg7 (19.Ng5 d4 20.Kf2 Bg5 21.hg5 0–0 22.Ke1 bc4+=; 19.hg5?! Bg5 20.Kf2 Bf6+/–; 19.cd5?! 0–0+/–) 19...Rg8 20.Bd4+–) 19.d4 dc4 (19...Bg4 20.Rg1 (20.Bg7?! Rg8 21.Be5 gh4+–) 20...Bf3 21.Bf3+– (21.Kf3?! 0–0 22.Kg2 gh4+/–)) 20.hg5 (20.Bc4 Bf6 21.hg5 Be5 22.Ne5 cb5 23.Bf7 Ke7+–) 20...Bg4 (20...cb5 21.Bg7 Rg8+–) 21.Bc4 (21.bc6 Qc6 22.Bg7 Rg8+–) 21...cb5? (better is 21...Bg5 22.Kf2 Rf8+/–) 22.Bg7+– bc4 23.Bh8 Bg5 24.Kf2 (24.Ng5?! Bd1 25.Rad1 0–0–0=) 24...0–0–0 25.Be5?? (better is 25.Kg3 Rg8 26.Rh7= (26.Kg4?? Bd2 27.Bg7 Rg7 28.Kf5 Qg6 29.Ke5 Re7 30.Kd5 Qc6)) 25...Rf8–+ 0–1. GuestTHRL – GuestRVQR, freechess.org, 2017.

6.d4 e4 7.Nfd2 f5 8.c4 Be7 (8...Nf6 9.Be2=) 9.Nc3 Nf6 10.Be2 0–0 11.h4 f4 12.Nde4 (12.0–0!?=) 12...Ne4–/+ 13.Ne4 fe3 14.fe3 Bh4 15.Kd2 Bf5 16.Bd3 (16.Nc3!?–/+) 16...Qe7 17.g3? (better is 17.Nc3 Bd3 18.Kd3–/+) 17...Be4–+ 18.gh4 Rae8 19.Qe2? (19.Rf1 Bd3 20.Rf8 Nf8 21.Kd3 Qe3 22.Kc2 Qf2 23.Kb3 Re3 24.Bc3–+) 19...Bf3 20.Qe1 Bh1 21.Qh1 (21.h5 Be4 22.hg6–+) 21...Qe3 22.Kc3 Rf3 23.Rd1 (23.Kb4 Qd3 24.Qd1 Qf5–+) 23...Nf4 24.Bc1 Ne2 (24...Ne2 25.Kc2 Nc1 26.Qf3 Qf3 27.Kc1 Qf2–+) 0–1. Hecimovic,Ivan (2195) – Mestrovic,Zvonimir (2430), Open, Zadar CRO, 2000.

6.d4 e4 7.Nfd2 f5 8.c4 Nf6 9.h4 f4 10.h5 (10.Nc3 fe3 11.fe3 Ng4 12.Nde4 A) 12...Ne3? 13.Qe2 Nf1 A1) 14.Kf1?! Be7=; A2) 14.Qf1?! Be7= (worse is 14...Nh4 15.0–0–0 Be7 16.Re1+–); A3) 14.Rf1+–; B) 12...Be7+/–) 10...fe3= 11.fe3 (11.hg6 ed2 12.Qd2 h5=) 11...Ne7 12.Nc3 Bf5 (12...d5!? 13.Qc2 Nf5 14.Nd5 Nd5 15.cd5 Ng3+=) 13.Be2+/– h6 (13...Qd7!?+/–) 14.g4 (14.0–0 Qd7+–) 14...Bh7 15.Qc2 (15.0–0!? Qd7+–) 15...d5 (15...Qd7 16.Rg1+/– (worse is 16.Nce4 Ne4 17.Ne4 d5–/+; 16.Nde4 Ne4 17.Ne4 d5–/+)) 16.a4 (16.0–0–0 Qd7+/–) 16...Qd6+= 17.0–0–0 (17.Rh3 Qd7 18.a5 Ng4+=) 17...c6 (17...Qg3!? 18.Nf1 Qg2=) 18.Qb3 (18.bc6 bc6 19.Rh3 Kf7+/–) 18...Bg8 (18...Qg3 19.Rde1+=) 19.Ba3 (19.Kb1!?+/–) 19...Qg3+= 20.Nf1 (20.Rde1 Be6+=) 20...Qc7= 21.Kb2 (21.Nd2=) 21...Nc8 (better is 21...dc4 22.Bc4 Bc4 23.Qc4 Ned5+=) 22.Bf8+/– Kf8 23.Nd2 Nd6 24.Rc1 (24.Rhf1 dc4 25.Bc4 Nc4 26.Nc4 Bf7 27.Qa3 Kg8+/–) 24...Qd7 (24...dc4!? 25.Bc4 Bc4 26.Nc4 Nc4 27.Qc4 Qf7 28.Qc5 Qe7+/–) 25.Rhf1 Ke7 26.Rf4 Be6 27.Rg1 (27.Qb4 a5 28.Qa3 Rhc8+/–) 27...Nf7 (27...dc4 28.Bc4 Rac8+/–) 28.Nf1 (28.Qc2!?+/–) 28...Ng5+= 29.Rg3 (29.Rh1!?+=) 29...Rhc8= 30.Nd2 Qd6 (30...Kf8 31.Qa3 Kg8 32.Nb3+=) 31.c5 (31.Rg2!?=) 31...Qd7+= 32.Qb4 (32.a5 Kf8=) 32...Kf7 33.Nb3 Kg8 34.Rg2 Kh8 (34...a6–/+) 35.Bd1 (35.a5 Rab8+=) 35...Bg8 (35...Nh3 36.Rf1 Ng4 37.Nd5–+) 36.Rf5 (36.a5 Rab8+=) 36...Ng4?? (better is 36...a6–/+) 37.Bg4+– (37.Bg4 Be6 38.Rf4+–) 1–0. Nadanian,Ashot (2390) – Hovhanisian,Asatur, EU–ch rapid Yerevan, 2004.

6.Be2 Nf6 7.0–0 Be7 8.c4 Be6 9.Qb3 0–0 10.d4 e4 11.Nfd2 Re8 (11...d5 12.Nc3 c6 13.bc6 bc6 14.Ba3=) 12.Nc3+= d5 (12...Bf5 13.f3+=) 13.cd5+/– Nd5 14.Nce4 Ne3? (better is 14...Rc8+/–) 15.Qe3+– Qd5?! (15...Bd5 16.Qc3 Bg5+–) 16.Bc4 Qd7 (16...Qh5 17.d5! Bg4 18.Qg3+–) 17.d5! Bf5 (17...Bd5 18.Qd4 Double attack (18.Qd4 Decoy)) 18.Qd4 Bb4 (18...Bf8+–) 19.Qg7 1–0. Heqexe – Stucer, internet, 2017.

6.h3 Nf6 7.c4 Be7 8.Be2 Bf5 9.d3 e4 (9...a6!?+=) 10.Nd4 Bd7 11.de4 Ne4 12.Bf3 Nc5 13.Nb3 Nb3 (13...Bf6 14.Nc3 Nb3 15.ab3+=) 14.Qb3 0–0 15.Bb7 Rb8 16.Bf3 c6 17.a4 d5 18.Nd2 (18.cd5!? cb5 19.ab5 Rb5 20.Qa2+/–) 18...dc4= 19.Qc4 cb5 20.Qd4 (better is 20.ab5!? Rb5 21.Bd4=) 20...Bf6–/+ 21.Qa7?? (better is 21.Qb4 Ne5 22.Be5 Be5 23.Rd1–/+) 21...Bb2–+ 22.0–0 (22.Rd1 ba4 23.0–0 Ne5–+) 22...Ba1 23.Ra1 ba4 24.Nc4 Rb4 25.Nd6 (25.Qc5 Qe7 26.Nd6 Rfb8–+) 25...Bh3! 26.Ne4 (26.gh3 Qd6 Discovered attack) 26...Be6 (better is 26...Nh4!? 27.Bd1 Bg2 28.Ng3–+) 27.Nc5 Bb3 (better is 27...Bd5 28.e4 Bc6 29.Re1–+) 28.Na4 Ba4 (better is 28...Nh4!? 29.Bc6 Ba4 30.Qc5–+) 29.Ra4 Rb1 (29...Rb1 30.Kh2 Qd6 31.g3 Ne5–+) 0–1. GuestLJTQ – GuestBLXP, freechess.org, 2017.

4.Bb5 Bd7

5.a3 Nf6 6.d3 a6 7.Ba4 g6 8.Nd2 Bg7 9.Rb1 0–0 10.e4 Re8 11.Ngf3 Bg4 12.0–0 d5 13.Qe1 b5 14.Bb3 d4 15.h3 Be6 16.Be6 Re6 17.Nb3 Nd7 18.Bc1 Re8 19.Bg5 Bf6 20.Bh6 Bg7 21.Qc1 Qe7 22.Nh2 Nd8 23.Ng4 Nf6 24.Bg5 Ne6 25.Bf6 Bf6 26.Nf6 Qf6 ½–½. Znak,Nicholas – Muszynski,Mateusz, RN–2008–0–00113, 2008.

5.Nc3 Nb4 6.Bd7 Qd7 7.Nf3 Qc6 8.a3 Nd5 9.Nd5 Qd5 10.0–0 Nf6 11.d3 Be7 12.c4 Qc6 13.Nh4 Qb6 14.Rb1= 0–0–0 15.Nf5+/– Bf8 16.Be5! Qa5 17.Bf6 Qf5?? 18.Bd8 Kd8 19.Rb7 a5 20.Rb5 (20.Rb5 c5 21.Ra5+–) 1–0. Whiterose – BIGAL 1971, ChessWorld.net, 2005.

4.Nf3 Nb4

5.a3 Nd5 6.d4 Bg4 (6...e4 7.c4 ef3 8.cd5 fg2 9.Bg2+=) 7.Be2 (7.h3 Bf3 8.Qf3 c6=) 7...ed4 8.Qd4 Ngf6 9.Nbd2 Be6 10.0–0 Be7 11.Rfe1 c5 (11...0–0 12.Bd3+=) 12.Qa4 Bd7 13.Qb3 0–0 14.Bc4 (14.Bf6 Nf6 15.Qb7 Qa5=) 14...Bc6 15.e4 Nb6 16.Be2? (16.Bb5 d5 17.Bc6 bc6+=) 16...Qc7 (16...Ne4 17.Ne4 Be4 18.Rad1–+) 17.c4 (17.Bb5 Rfe8+=) 17...Rac8 (17...Ne4 18.Ne4 Be4 19.Rad1–/+) 18.Rac1 (18.Qd3 Nfd7+=) 18...Nbd7 (18...Ne4!? 19.Ne4 Be4–/+) 19.Bd3 b6 20.Qc2 Rce8 21.e5 Ng4 (21...de5 22.Ne5 Ne5 23.Be5=) 22.ed6 (22.Bh7!? Kh8 23.e6 fe6 24.Bg6+=) 22...Bd6= 23.Bh7 Kh8 24.Bf5 Bh2 25.Kf1 Ndf6 (25...Qf4!?+=) 26.Bg4+= Qf4?? (better is 26...Ng4 27.Ng5 f5 28.Re8 Be8+/–) 27.Bh3+– (27.Nh2 Qh2 28.Re3 Bg2 29.Ke1 Ng4 30.Bg7 Kg8–+) 27...Nh5 (27...Ng4 28.Qc3 f6 29.g3 Bg3 30.fg3 Qg3 31.Bg4 Qg4 32.Re8 Re8 33.Kf2+–) 28.Re8 (better is 28.Be5 Re5 29.Re5 Nf6+–) 28...Re8 29.Re1 Re1 (29...Rd8 30.Be5 Rd2 31.Qb3+– (31.Bf4?! Rc2 32.Bh2 f6+–; 31.Qd2 Qc4 32.Re2 Bf3 33.Qd8 Kh7 34.Bf5 Kh6 35.Bg7 Ng7 36.Qf6 Kh5 37.gf3 Nf5 38.Qf5 Kh6 39.Qh3 Kg6 40.Qh2 Qd3+–)) 30.Ke1 Nf6 (30...Bf3 31.Nf3 (31.gf3?! Bg3+–) 31...Nf6 32.Be5 Qf3 33.gf3 (33.Bh2?! Qa3 34.Be5 Qb4 35.Kd1 b5+–) 33...Be5 34.Qa4 Bc3 35.Kd1+–) 31.Qf5 (better is 31.Be5 Qh6 32.Bh2+–) 31...Qf5 32.Bf5 Bd6 33.Bf6 gf6 34.Be4 Bd7 35.Bd5 Kg7 36.Ne4 Be7 (36...Be5 37.Ne5 fe5 38.Nd6+–) 37.Nfd2 f5 38.f3?? (better is 38.Nc3+–) 38...fe4+= 39.Ne4 f5 40.Ng3?? (40.Nf2 b5+=) 40...Kf6 (better is 40...Bh4–+) 41.Ne2 Bd6 42.g3 Kg5 (better is 42...Be5!?–/+) 43.f4= Kf6 44.Kf2 Ba4 45.Ke3 Bc2 46.Nc3 a6 (better is 46...Bb3=) 47.a4 Bb3 0–1. Fournier,Frederic (1740) – madelacre, Club Buho21 Buho21.com, 2006.

5.Be2 Be6 6.0–0 Nf6 7.d4 ed4 (7...Bf5!? 8.de5 de5 9.Be5 Nc2=+) 8.Nd4= Be7 9.c4 (9.Ne6 fe6 10.Bh5 g6=) 9...0–0=+ 10.Bc3 c5 11.Bb4 (11.Ne6 fe6 12.Bf3 d5=+) 11...cb4–/+ (11...cd4?! 12.Qd4 d5 13.cd5 Nd5 14.Be7 Qe7 15.Rd1=) 12.Nd2 a5 13.Nb5 (13.Qb3 Nd7–/+) 13...b6 14.Nb3 Bf5 15.N3d4 Bd7 16.Qb3 Ne4 17.Rfd1 (17.Qc2 Nc5=+) 17...Nc5 18.Qb1 Bf6 19.Bf3 Rb8 20.Nd6? (20.Be4 Ne4 21.Qe4 Re8=+) 20...Qe7 (better is 20...Ba4!? 21.Nc6 Bc6 22.Bc6 Ba1 23.Qa1 Qe7–+) 21.N6f5 Bf5 (21...Qe5!?=+) 22.Qf5= Bd4 (22...Rbc8!?=) 23.ed4+/– a4?? (better is 23...Qe6 24.Qc2 Nd7+=) 24.Be4?? (better is 24.dc5 Qc5 25.Bd5+–) 24...g6 25.Qd5 (25.Qh3 Ne4 26.Re1–+) 25...Ne4?? (better is 25...Rfd8 26.dc5 Rd5 27.Bd5 bc5–+) 26.Re1=+ Rfe8 27.f3 Qf6 28.fe4 (28.Re4 Red8 29.Qe5 Qe5 30.de5 Rd2=+) 28...Rbd8 29.Qb5? (better is 29.e5 Qf4 30.Re4=+) 29...Rd4?? (29...Qd4 30.Kh1–+) 30.Rac1 (better is 30.Qe8 Kg7 31.e5+–) 30...Rde4–+ 31.Re4 Re4 32.Qb4 (32.Qa4 Qd4 33.Kh1 Qc4–+) 32...Qd4 (better is 32...Re2 33.Kh1 Ra2–+) 33.Kh1–/+ Re2 34.Re1?? (better is 34.Qa4 Qf2 35.Qa8 Kg7 36.h3–/+) 34...Qf2 (better is 34...Qb2 35.Re2 Qb4–+ (35...Qe2?! 36.Qb6 h6 37.Qb1–+)) 35.Re2?? (35.Rg1 a3 36.Qb1–+) 35...Qf1 (35...Qe2?! 36.Qb6 h6 37.h3 Qa2 38.Qb8 Kh7 39.c5–+) 0–1. drasko5 – adam4, Live Game Caissa's Web, 2004.

3.e3 Bd7

4.b5 (--> 1.b4 e5 2.Bb2 d6 3.b5 Bd7 4.e3).

4.c4 Na6 5.Qf3 Nb4 6.Na3 –/+.

4.c4 b6 5.b5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 c6 9.Nc3 cb5 10.Nb5 Be7 (10...Nf6 11.Be2=) 11.f4 (11.d4 Bb5 12.cb5 Nd7+=) 11...Nc6 (11...Bb5 12.cb5 Bh4 13.g3=) 12.Nf3 e4?? (better is 12...Bg4+=) 13.Bg7+– ef3 14.Bh8 fg2 15.Bg2 Bh4 (15...Na5 16.Qa4+–) 16.Kf1 Nge7 (16...Nf6 17.Qb1+–) 17.Nd6 Kf8 18.Nf7! Kf7 19.Qh5 Ng6 (19...Kg8 20.Qh4 Be6+–) 20.Qh7 Ke6 21.Qg6 (21.Qg6 Ke7 22.Qh6+–) 1–0. Janek – zandar, internet, 2017.

4.c4 c5 5.b5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Qa5 9.Nc3 Nf6 10.Nf3 Bg4 11.Be2 Bf3 (11...Be7!?+=) 12.Bf3+/– (12.gf3?! Be7=) 12...Be7 (12...Qc7!?+/–) 13.Bb7+– 0–0 14.0–0 Rd8 15.Nd5 Qa7?? (better is 15...Nd5 16.Bd5 Nd7+–) 16.Ne7 Kf8 17.Nc6 Qb7 18.Nd8 Qd7 19.Nc6! Nc6 20.bc6 Qc6 21.Bc3 Ne4 (21...Kg8 22.d3+–) 22.Qb3 (22.Qf3 d5+–) 22...Qa6 (22...Qc8 23.Qb6 Qe6 24.Bb2+–) 23.Ra1 (23.Qb8!? Ke7 24.Qc7 Kf6+–) 23...Qc8 24.Qb5 Qf5 (24...h6 25.Ra7 Kg8 26.Ba5+–) 25.Ra8 Ke7 26.Qe8 (26.Re8!? Kf6 27.Be5 Kg6+–) 26...Kf6 27.Qd8 Kg6 28.f3 Nc3 29.Qd6 Kg5 30.dc3 Qb1 31.Kf2 Qc2 (31...Kh4 32.Qd8 g5 33.Qd2+–) 32.Kg3 Qc3 (32...f6 33.Qc5 Qc3 34.h4 Kg6+–) 33.h4 Kf5 34.e4 1–0. GuestHKRL – shaanpathan, freechess.org, 2017.

4.c4 c6 5.Nf3 Nf6 6.Qc2 Be7 7.d3 0–0 8.Nbd2 a5 9.a3 ab4 10.ab4 Ra1 11.Ba1 Na6 12.Bc3 b5 13.Be2 Qc7 (13...c5 14.bc5 b4 15.cd6 bc3 16.Ne4+=) 14.0–0 d5 (14...Ra8 15.Rb1=) 15.Be5+= Qb7 16.cb5 cb5 (16...Qb5 17.Qb2+=) 17.Qb2+/– Nb4 18.Bf6 gf6 19.Nd4 Rc8 20.Rc1 Rc1 21.Qc1 Nc6 22.N2f3 Nd4 23.Nd4 (worse is 23.ed4 Qc6 24.Qb1 Ba3+=) 23...b4 24.Bd1 Bd6 25.Bb3 Kg7 26.f4 f5 (26...Qa6 27.Qd1+=) 27.Qe1 (27.Qa1 Kg8+/–) 27...Kh8 (27...Qa6!? 28.Bc2 Qa7 29.Qg3 Kh8=) 28.Qh4+/– Qc7? (better is 28...Bc5!? 29.Qf6 Kg8+/–) 29.Qf6+– Kg8 30.Bd5 Bc8 (30...Be8 31.Qg5 Kh8 32.Nf5+–) 31.Kf2 (31.Nb5 Qc1 32.Kf2 Qd2 33.Kf3 Be6 34.Qg5 Kf8 35.Qd8 Kg7 36.Qd6 Qd1 37.Kg3 Qe1 38.Kh3 Qe3 39.g3 b3+–) 31...Bf4? (31...Bf8+–) 32.ef4 Qf4 33.Nf3 (33.Ke2!? Qg4 34.Kd2 Qg7 35.Qg7 Kg7+–) 33...Qc7 34.Qg5 Kf8 35.Qh6 Ke7 (35...Kg8 36.d4 Qc2 37.Nd2 Qc3 38.Qg5 Kf8+–) 36.Qg5 Kd6?? (better is 36...Kf8=) 37.Qg3 (37.Qf4 Kd7 38.Ne5 Ke7 39.Nc6 Kd7+–) 37...Kd7 38.Qc7 (better is 38.Ne5 Ke7 39.Nc6 Kd7 40.Qe3+–) 38...Kc7 39.Nd4 Kd6 40.Bb3 (40.Bf7 Kc5 41.Nb3 Kd6+–) 40...f6 (40...Be6 41.Ke3+–) 41.Nc2 Kc5 42.Ke3 (42.d4 Kb5+–) 42...Bb7 (42...Kb5 43.Kf4+–) 43.g3 Bd5 (43...Bg2 44.Kf4+–) 44.d4 Kd6 45.Bd5 Kd5 46.Nb4 Kd6 47.Nd3 (47.Kf4 Ke6 48.d5 Kd6 49.Kf5 Ke7+–) 47...Kd5 48.Nf4 Kd6 49.Kf3 h6 (49...Kd7 50.Nh5 Ke6 51.Ng7 Kd5 52.Nf5+–) 50.h3 (50.Ne2 Kd5+–) 50...Ke7 (50...Kc6 51.Ne2 Kd7 52.Kf4+–) 51.g4 (51.Nd5 Kd6+–) 51...fg4 52.hg4 (52.Kg4!? Kf7+–) 52...Kd6 (52...Kf7 53.Ke4 Ke8 54.Nh5+–) 53.Ke4 White plans d5 53...Kd7 54.Kf5 Ke7 55.d5 Kf7 (55...Kd7 56.Nh5 Kd6 57.Nf6 Ke7 58.Ng8 Kd6 59.Nh6 Kd5+–) 56.d6 Ke8 Black threatens to counter with Nd5 57.Kf6 (57.Ke6 Kd8 58.d7 Kc7 59.Nd5 Kc6 60.d8Q Kb5 61.Qb8 Kc4 62.Qg3 Kb5 63.Qb3 Kc5 64.Qb4 Kc6 65.Qb6) 57...Kd7+– 58.Ke5 Ke8 59.Ke6 Kd8 60.Ng6 (60.d7 Kc7 61.Nd5 Kb7 62.d8Q Ka7 63.Qc7 Ka6 64.Qb6) 60...Ke8 (60...Kc8 61.d7 Kc7 62.Ke7 Kc6 63.d8Q Kb5 64.Qd7 Kc4 65.Ne5 Kb4 66.Qd4 Kb5 67.Kd6 h5 68.Qb2 Ka4 69.Kc5 hg4 70.Qb4) 61.d7 Kd8 62.Ne5 (62.Kd6 h5 63.Ne5 hg4 64.Nc6) 62...Kc7+– 63.Nf7 h5 (63...Kb6 64.d8Q Kc5 65.Qf8 Kd4 66.Qh6 Kd3 67.Ne5 Kc3 68.Qc1 Kb4 69.Qc4 Ka5 70.Qc5 Ka4 71.Nc6 Kb3 72.Nd4 Ka4 73.Qb5 Ka3 74.Qb3) 64.gh5 1–0. GuestJWTP – GuestYLWM, freechess.org, 2017.

4.c4 Qg5 5.Nf3 Qg6 6.Nh4 Qg5 7.Nf3 Qg6 8.Nc3 Bg4 (8...Nf6 9.d4 e4 10.Nd2=) 9.Be2 Nf6 10.h3 (10.Nh4 Qh5 11.Bg4 Ng4+=) 10...Bf5 (better is 10...Bd7!? 11.Rh2 Be7=) 11.Nh4+= Qg5 12.Nf5 Qf5 13.0–0 Be7 14.Nd5 Nd5 15.cd5 Qe4 (15...0–0 16.d4+=) 16.Bf3 (better is 16.Qa4!? Kd8 17.Qb5+/–) 16...Qb4= 17.Qc2 Qh4 (better is 17...Nd7!?=) 18.Qc7+/– 0–0?? (better is 18...Nd7+/–) 19.Qb7+– Nd7 20.Qd7 Rfb8 (20...Rfd8 21.Qg4+–) 21.Ba3 Rb6 (21...Qf6 22.Rfc1+–) 22.Rab1 Rb1 (22...Bf8 23.Rfc1+–) 23.Rb1 e4 (23...Qf6 24.d4!+–) 24.Bg4 (24.g3 Qg5 25.Be4 Rd8 26.Qa7 f5+–) 24...h5 (24...Qf6 25.Rb7 Qa1 26.Kh2 Qe5 27.g3+–) 25.g3 (better is 25.Bf5 g6 26.g3 Qf6 27.Be4 h4+–) 25...Qg5 26.Bf5 Rd8 27.Qc7 (27.h4 Rd7 28.hg5 Rd8+–) 27...h4 (27...Qf5 28.Qe7 Rc8+–) 28.g4 g6 29.Be4 f5 30.Bf3 (30.f4 Qf6 31.Bb2 Qf8 32.gf5 gf5+–) 30...fg4 31.Bg4 Bf6 (31...Kf8+–) 32.Kf1 (32.Rb7 Be7 33.f4 Qg4 34.hg4 Rd7 35.Qc8 Kh7 36.Bb2 Rd8 37.Re7 Kh6 38.g5 Kh5 39.Rh7) 32...Rf8 (32...Be7 33.Be6 Kh7 34.f4+–) 33.Be6 (33.Be6 Kh8 34.Bd6+–) 1–0. GuestYYLH – GuestJMVG, freechess.org, 2017.

4.d4 f6 5.de5 de5 6.a3 Nh6 7.Nd2 a6 8.Ne4 Nc6 9.c4 Qe7 10.Nc5 Bc8 11.e4 b6 12.Nb3?? Bg4 13.f3 Be6 14.Bd3 Rd8=+ 15.Qc2 Nd4 16.Nd4+= ed4 17.Ne2 c5 18.bc5 bc5 19.Qa4 Bd7 20.Qa6 Qe5 21.Ng3 Bd6+= 22.Qa5 0–0 23.a4 Qg5 24.Kf2?? Qe3–+ 25.Kf1 Qd3 26.Ne2 Qc4 27.Kf2 Qb3 28.Bc1 Nf7 29.Bd2 Ra8 30.Nc1 Qe6 31.Qb6 Rfb8 (31...Rfb8 32.Qb8 Rb8–+) 0–1. alwayslosing (1945) – tata (2000), net–chess.com, 2008.

4.Nf3 Nc6 5.b5 Nb4 (5...Nce7 6.Nc3=) 6.a3 Nd5 7.c4 Nb6 8.a4 (8.d4 e4 9.Nfd2 d5+=) 8...Bg4 (8...e4 9.a5 ef3 10.ab6 fg2 11.Bg2 ab6 12.Bb7 Ra1 13.Ba1+=) 9.a5 Bf3? (better is 9...Nd7+=) 10.Qf3+– (10.gf3?! Nd7+=) 10...e4?? (better is 10...Nd7+–) 11.Qe4 Qe7 (11...Ne7 12.ab6 ab6 13.Qb7 Ra1 14.Ba1+–) 12.Qb7 Rd8 13.ab6 ab6 14.Be2 (14.Ra7 Qd7+–) 14...Nf6 (14...d5 15.Bg4 f6 16.Ra8+–) 15.0–0 (better is 15.Bf6 gf6 16.Nc3+–) 15...g6 (15...d5 16.Bf3+–) 16.Ra8 (better is 16.Qc6 Nd7 17.Bh8+–) 16...Bg7 17.Rd8 (17.Qc6 Qd7 18.Rd8 Kd8+–) 17...Qd8 18.Qc6 Kf8 (18...Qd7 19.Qf3 Qe6 20.Qa8 Ke7 21.Qc6+–) 19.Nc3 Nd7 (19...Qd7 20.Qa8 Ke7 21.Qa1+–) 20.Ra1 Qf6 (20...Bf6+–) 21.Qd7 Kg8 22.Ra8 Bf8 23.Rc8 h5 24.Qc7 Kh7 25.Rd8 Bg7 26.Rh8 Bh8 27.Qb6 (27...Qe6 28.d4+–) 1–0. Familyfork – janrav, Live Game Caissa's Web, 2004.

4.Nf3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.e3 Nf6 4.Nf3 Bd7).

4.Nf3 g6 5.c4 (5.Bc4 Nf6+=) 5...Bg7 (5...Nf6 6.Be2=) 6.Qc2 (6.d4 ed4 7.Nd4 Nf6=) 6...Nf6 7.Be2 0–0 8.d3 Ng4 (8...Re8 9.0–0=) 9.h3 (9.0–0 Re8=) 9...Nh6 (9...Nf6 10.0–0=) 10.0–0+= d5? (10...f5 11.d4 e4 12.Nfd2+=) 11.Nbd2 (11.Be5 Be5 12.Ne5 dc4 13.Qc4 Re8+–) 11...c6? (11...d4 12.ed4 ed4 13.Bd4 Bd4 14.Nd4 Bh3 15.Qc3+=) 12.a4 (12.Be5 Be5 13.Ne5 Bf5+–) 12...e4? (better is 12...f6+=) 13.de4 dc4 (13...Bb2 14.Qb2 dc4 15.Nc4+–) 14.Bc4 (14.Bg7 Kg7 15.Nc4 Qe7+–) 14...Qc8 (14...Bb2 15.Qb2 Qe7 16.Rfd1+–) 15.Kh1 (15.Bg7 Kg7 16.Qc3 Kg8+–) 15...Bh3 (15...Bb2 16.Qb2 Be6 17.Rfd1+–) 16.gh3 (16.Bg7 Kg7 17.gh3 Qh3 18.Nh2 Ng4+–) 16...Qh3 17.Nh2 Ng4 18.Ndf3 Nd7 (18...Bb2 19.Qb2 Nd7 20.Rg1+–) 19.Bg7 Kg7 20.Rg1 Nde5 (20...Nh2 21.Nh2 Ne5+–) 21.Qb2 (21.Rg3!? Qh5 22.Kg2 Nh2 23.Ne5 Qe5+–) 21...f6 (better is 21...Nf2 22.Qf2 Nc4+/–) 22.Rg3 (better is 22.Bf1 Qh5 23.Kg2+/–) 22...Qh5= 23.Qe2?? (better is 23.Rg4 Ng4 24.Rg1 Nh2 25.Nh2=) 23...Nf3–+ 0–1. GuestRXMJ – GuestZWGG, freechess.org, 2016.

4.g3 Nf6 5.Bg2 Bc6 6.Nf3 Be7 7.0–0 Nbd7 (7...a5 8.ba5 Ra5 9.Nc3=+) 8.d4 (8.c4!?=) 8...e4=+ 9.Ne1? (9.Nfd2 d5=+) 9...d5 (9...Bb5 10.d5–+) 10.Nc3 (10.Nd2 Bb4 11.c3 Bd6–/+) 10...Bb4–+ 11.a3 (better is 11.f3–+) 11...Bc3 12.Bc3 0–0 (better is 12...Bb5!?–+) 13.Bb4 Re8 14.Rc1? (better is 14.f3–+) 14...Bb5 15.f4 Bf1 16.Kf1 (16.Bf1 Nb6 17.Rb1–+) 16...Ng4 (better is 16...Nb6–+) 17.Qg4=+ Nf6 (17...Nb6 18.Rb1=+) 18.Qe2 Qd7 19.h3 Qa4 20.c4 a5 21.Bd2 c6 (21...Qa3!? 22.g4 dc4 23.Qc4 c6=+) 22.c5 Qb5? (22...Qa3 23.Rb1 Qa2 24.Rb7 Reb8 25.Rb8 Rb8=+) 23.Qb5+– cb5 24.c6 (better is 24.Ke2+–) 24...bc6= 25.Rc6 Rec8 (25...Reb8+=) 26.Rb6 (26.Rc8 Rc8 27.Ba5 Ra8+–) 26...Rcb8?? (26...b4=) 27.Rd6?? (better is 27.Rb8!? Rb8 28.Ba5+–) 27...Rc8 (27...b4 28.Rc6=+) 28.g4 (better is 28.Ke2+=) 28...Rc2?? (better is 28...b4 29.ab4 a4=) 29.Ke2 b4?? 30.ab4 Rb2 31.ba5 h6 32.g5 hg5 33.fg5 Nh5 34.Rd5 Ng3 35.Kf2 Rd2 36.Kg3 Rb8 37.Be4 g6 38.Nf3 Rd1 39.a6 Ra1 40.Rd6 Rc8 41.Bd5 Rc7 42.Ne5 Rg1 43.Kf2 Rg5 44.h4 Rf5 45.Ke2 Rc2 46.Kd3 Rc7 47.Rd8 Kg7 48.Bb7 Rc1 49.a7 Ra1 50.a8Q Ra8 51.Ba8 Rf6 52.Rd7 Rf1 53.Bd5 Rd1 54.Ke2 Ra1 55.Rf7 Kh6 56.Rf6 Kh5 57.Rg6 Kh4 58.Rg4 Kh3 59.Be6 Ra2 60.Ba2 (60...Kh2 61.Kf2 Kh3 62.e4 Kh2 63.Rh4) 1–0. MasterofDisaster – rumrunner, Live Game Caissa's Web, 2004.

4.c4 a6

5.a4 Nc6 6.b5 Nce7 7.d4 =.

5.Qc2 h6 6.Nf3 Nc6 7.a3 Nf6 8.Nc3 Be6 9.Be2 e4? (better is 9...Be7!?=) 10.Ne4+/– Bf5?? (better is 10...Ne4 11.Qe4 d5+/–) 11.Nf6+– gf6 (11...Qf6 12.e4 Be4 13.Qe4 Qe7 14.Qe7 Ne7+–) 12.Qf5 Bg7 13.0–0–0 Qe7 14.d4 Qe6 15.Qe6 fe6 16.d5 ed5 17.Rd5 0–0–0 18.Rhd1 Rhe8 19.b5 ab5 20.Rb5 Na7 21.Rb3 Nc6 22.Rd5 Re4 23.Bd3 Re7 24.Nd4 Ne5 (24...Nd4 25.Bd4 Rde8 26.Rdb5+–) 25.Bf5 Kb8 (25...Rdd7 26.c5 dc5 27.Nf3 Nf3 28.gf3+–) 26.f4 Nc4 27.Nc6 Ka8 28.Nd8 Ne3 (28...Re3 29.Ra5! Na5 30.Re3 h5+–) 29.Ra5 Kb8 30.Rb7 1–0. combijack (1775) – sanjeev18111975, gameknot.com, 2012.

5.Nc3 Nc6 =.

5.Nc3 Nf6 6.Nf3 Bg4 7.Be2 Bf3 8.Bf3+= c6 9.0–0 Nbd7 10.Qc2 Be7 11.Ne4 d5 12.Nf6+/– Bf6 13.cd5+– cd5 14.Bd5 Rc8 15.Qe4 0–0 16.Bb7 Rc2 17.Qc2 Nb6 18.Ba6 Qd7 19.Rfd1 Na4 20.b5 Nb2 21.Qb2 e4 22.Qb3 Ba1 23.Ra1 Qd2 24.b6 Qa5 25.Qb5 Qb5 26.Bb5 Rb8 27.Bc6 Rb6 28.Be4 g6 29.a4 f5 30.Bf3 Kf8 31.a5 Ra6 32.Be2 Ra7 33.a6 Ke7 34.Rb1 Kd6 35.Rb7 Ra8 36.Rh7 Ke5 37.a7 Kd6 38.Bf3 Rc8 39.h3 Rc1 40.Kh2 Rc2 41.a8Q Rf2 42.Qc6 Ke5 43.Re7# 1–0. makaveli1982 – Nykolaj79, internet, 2007.

5.d4 ed4 A) 6.Bd4 Nf6 (6...Nc6 7.Bc3 Nf6 8.Nf3 Ne4 9.b5 Ne7=) 7.Nc3 Be7 8.Nd5 Nc6 9.Bc3 0–0=; B) 6.ed4 d5 (6...Nf6 7.d5 Be7 8.Nf3 a5 9.b5 0–0+=; 6...Be7 7.d5 Nf6 8.Nf3 a5 9.b5 0–0=) 7.a3 Qe7 8.Qe2 dc4 9.Qe7 Be7=; C) 6.Qd4 Nc6 (6...Nf6 7.Qf4 Be7 8.Nc3 Be6 9.Rd1 a5=) 7.Qd2 Nf6 8.Nf3 Qe7 9.a3 Ne5=.

5.a4 Be7

6.Qb3 Nf6 7.d4 ed4 8.ed4 0–0 9.Bd3 a5+=.

6.Qb3 Nf6 7.d4 ed4 8.ed4 0–0 9.d5 a5 10.ba5=.

6.Qb3 Nf6 7.Ne2 a5 8.b5 Be6 9.d4 Nbd7 10.Nd2+=.

6.b5 Nf6 7.d4 ab5 8.ab5 Ra1 9.Ba1 e4 10.Nd2=.

6.d4 Nf6 7.b5 ab5 8.ab5 Ra1 9.Ba1 e4 10.Nd2=.

6.d4 Nf6 7.Ne2 0–0 8.Qb3 a5 9.b5 ed4 10.Nd4=.

6.Be2 Nf6 7.Nc3 c6 (7...Bf5 8.Nf3+= Nc6 9.b5 Nb4=) 8.Nf3= (8.d4 ed4 9.ed4 Qb6=) 8...0–0 (8...e4 9.Nd4 c5=) 9.0–0 (9.d3 Qb6=) 9...Bg4 (9...e4=) 10.h3 (10.d4 e4 11.Nd2 Be2 12.Qe2 d5=) 10...Bh5 (10...Bf3 11.Bf3 d5 12.cd5 cd5 13.d3 Bb4 14.Qb3 Bc3 15.Bc3=) 11.d4 e4 12.Nd2 Be2 13.Qe2 d5 14.c5 Nbd7 15.b5 a5 (15...Qa5 16.f3 ef3 17.Qf3=) 16.b6 (16.Rab1 Rc8+=) 16...Ne8 (16...Re8 17.Rae1=) 17.f3+= f5 18.fe4 fe4 19.Rf8 Kf8 20.Rf1 Kg8 21.Nd1 Bg5 22.Nb3 Nb6 (22...Nef6!?+=) 23.cb6+/– Qb6 24.Nc5 Nd6? (24...Nf6 25.Qe1 Bh6 26.Qg3+–) 25.Ne6 (better is 25.Qg4 Qd8 26.Ne6+–) 25...Bf6?? (25...Be7+–) 26.Qg4 Kf7 (26...Qa7+–) 27.Qg7 1–0. Sekyra,Michael – Frank,K, Vienna op–F, 1996.

6.Ne2 Be6 7.Qb3 (7.Na3 Nf6 8.d4 0–0 9.d5 Bd7 10.a5+=) 7...Nc6 8.d4 d5 9.c5 Nh6 10.Nd2+=.

6.Ne2 Nf6 7.d4 0–0 8.Qb3 a5 9.b5 ed4=.

5.a4 Nf6

6.b5 Be7 (6...ab5 7.ab5 Ra1 8.Ba1 Be7 9.d4 e4=) 7.d4 ab5 8.ab5 Ra1 9.Ba1 e4=.

6.Be2 Qe7 7.Nf3 (7.Nc3 Bf5 8.Nf3 Nc6 9.b5 Nb4 10.d3=) 7...h6 (7...e4 8.Nd4= d5 9.Bc3 dc4 10.Bc4=) 8.0–0 (8.d3 g5 9.0–0 g4 10.Nfd2+=) 8...Qe6 (8...e4 9.Nd4= d5 10.Bc3=) 9.Nc3 (9.d4 e4 10.d5 Qf5+=) 9...c6 (9...Qf5 10.Nh4+= (10.d3+=)) 10.d4+/– e4 11.Nd2 (11.d5 Qf5 12.Nd2 Qg6+/–) 11...d5+= 12.c5 (12.b5 Be7+=) 12...Be7 13.Nb3 Bd8 14.b5 a5 (14...Be7 15.Na5 Bc8 16.b6+=) 15.b6 Na6 (15...Qf5+=) 16.Na5 (better is 16.Qd2!?+/–) 16...Nc5= 17.dc5 Ra5 18.Qd4 (18.Qd2 Ra8+=) 18...Be7= 19.Ba3 0–0 20.Bb4 Raa8 21.a5 Bc8 22.Ra2 (22.a6 ba6 23.Ra5 Ng4=) 22...Nh7 (22...Ng4 23.Qd1=) 23.Rfa1 Bf6 24.Qd1 Bc3 (24...Be5!?=) 25.Bc3+= Qg6 26.Kh1 (26.Rb2 Bh3 27.Qf1 Bg4 28.Bg4 Qg4+/–) 26...Nf6+= 27.h3 Rd8 28.a6 ba6 29.Ba6 Ba6 30.Ra6 Rab8? (better is 30...Ra6 31.Ra6 Nd7+/–) 31.Be5+– Rb7 32.Qa4 Nd7 (32...Re7 33.Ra8 Ra8 34.Qa8 Kh7 35.Bf6 Qf6 36.Ra7 Qf2 37.Re7 Qe3 38.Rf7 (38.Qc6?! Qc1 39.Kh2 Qf4 40.Kg1 Qc1 41.Kf2 Qd2 42.Kf1 Qd1 43.Kf2 Qd2 44.Kg3 Qe3 45.Kh2 Qf4 46.g3 Qf2 47.Kh1 Qf1 48.Kh2 Qf2 49.Kh1 Qf1 50.Kh2 Qf2=) 38...Qc1 39.Kh2 Qc5 40.b7 Qd6 41.g3+–) 33.Ra8 Rf8 (33...Nb8 34.Bb8 Rbb8 35.Rb8 Rb8+–) 34.Rf8 Nf8 35.Qa8 Rd7 36.b7 (better is 36.Bc7!? f5 37.b7 Rc7+–) 36...Rb7 37.Qb7 Qf5 (37...Kh7 38.Bd6 Ne6 39.Qc6+–) 38.Bd4 Kh7 39.Ra7 Ne6 (39...Qf2 40.Qc6 Ne6 41.Qd5+–) 40.Qf7 Qf7 41.Rf7 Kg6 42.Re7 Nd4 43.ed4 Kf5 44.Rg7 (44.Rg7 e3 45.fe3+–) 1–0. Kucharkowski,Jens – Jenke, Freital, 1982.

6.Be2 Be7 7.Nc3+= (7.d3 d5 8.Be5 dc4 9.dc4 Bb4 10.Bc3+=; 7.Nf3 e4 8.Nd4 c5 9.Nc2 Nc6 10.bc5=) 7...Bf5 8.Nf3 Nc6 9.b5 Nb4 10.d3=.

6.Ne2 Nc6 7.b5 Nb4 8.Ng3 Be7 9.Be2 h5=.

6.Ne2 Be6 7.Na3 Be7 8.d4 0–0 9.d5 Bc8+=.

6.Ne2 Be6 7.Na3 Be7 8.d4 0–0 9.d5 Bd7 10.a5+=.

4.c4 Be7

5.Nf3 Nf6 6.Nc3 0–0 7.Qc2 Nc6 8.a3 Be6 9.Be2 d5 10.Ng5 d4 11.Nce4 Bc8?? (better is 11...Bf5+=) 12.Nf6 1–0. combijack (1760) – ramcik, gameknot.com, 2011.

5.f4 Bf6 6.Qc2 Qe7 (6...ef4 7.ef4 Nc6 (7...Qe7 8.Ne2 Nc6 9.a3 a5–/+) 8.a3–/+ Qe7 9.Ne2 a5–/+) 7.Be2 (better is 7.Nc3!?= c6 8.fe5 de5 9.Ne4 Bf5=) 7...ef4–/+ 8.ef4 Nc6 9.a3 Nd4 10.Bd4 Bd4 11.Nc3 Nh6 (11...Bc6 12.Kf1 Qf6 13.Bf3+=) 12.Nd5 (12.Nf3 Bc3 13.Qc3 0–0=) 12...Bf5 13.Qa4 (13.Qf5 Nf5 14.Ne7 Ke7=) 13...Bd7 (13...Qd7 14.Qd7 Kd7 15.Nc3–/+) 14.b5 (14.Qa5 Qh4 15.g3 Qd8 16.Nc7 Kf8 17.Na8 Qa5 18.ba5 Ba1+=) 14...Qe4 (14...Qd8 15.Rb1–/+) 15.0–0–0 (15.Nc7 Ke7 16.0–0–0 Rac8=) 15...0–0 (15...Bf5 16.Qb3 0–0–0= (worse is 16...Qg2 17.Bf3 Qf2 18.Nc7 Ke7 19.Ne2+–)) 16.Bf3= Qd3 17.Ne2 (better is 17.Be2!? Qe4 18.Bf3=) 17...Bf5 (17...Bc5 18.Ndc3 Rfe8 19.Bb7–/+) 18.Ne7 Kh8 19.Nf5 Nf5 20.Ng3 (20.Rdf1 Bc5 21.Qc2 Qa3 22.Kd1 Qa1 23.Qc1 Qa4 24.Qc2 Qc2 25.Kc2+=) 20...Ng3–+ 21.hg3 Bf6?? (better is 21...a6 22.b6 cb6–+) 22.Bb7= Rab8 23.Bf3?? (23.Bc6 Rb6 24.Rde1 Rc6 25.bc6 Bb2 26.Kb2 Rb8 27.Qb4 Rb4 28.ab4 g6+=) 23...Rb6?? (better is 23...c6 24.Rde1 cb5–+) 24.Rde1= Qd4 (24...h6!?=) 25.Qb3 a6 26.Qb1 (better is 26.Kd1+=) 26...Qc4–/+ 27.Kd1 (27.Qc2 Qc2 28.Kc2 Rb5–/+) 27...h6 28.Bc6?? (28.Re3 Rb5 (28...ab5 29.Qf5 Qa4 30.Ke1+=) 29.Qc2 Qc2 30.Kc2 d5–/+) 28...ab5 (better is 28...Qc6! 29.bc6 Rb1 30.Kc2 Rb2 31.Kd1–+) 29.Re8? (29.Be4 Qa4 30.Qc2 Qa3 31.Qc7 Ra6–+) 29...Re8 (better is 29...Qa4! 30.Ke2 Re8 31.Be8–+) 30.Be8 Qa4 (better is 30...b4 31.a4 Qd5–+) 31.Ke1? (better is 31.Qc2 Qa3 32.Bf7 Qa1 33.Qc1 Qa4 34.Qc2–+) 31...Qa3 32.Rh3 Qb2 (better is 32...Qa8 33.Bd7 Ra6 34.Bb5–+) 33.Qe4?? (better is 33.Qb2 Bb2 34.Bf7–/+) 33...Qc1 (better is 33...d5!? 34.Qd5 Re6 35.Kf2 Bd4 36.Kf3 Qd2 37.Kg4 Qe2 38.Qf3 Rg6 39.Kh5 Qe8 40.Rh1–+) 34.Ke2 (34.Kf2 Qd2 35.Qe2 Bd4 36.Kf3 Qc3 37.Kg4–+) 34...Qc4 (better is 34...d5 35.Qd5 Rd6 36.Bf7 Rd5 37.Bd5 Qc2–+) 35.Qc4–/+ bc4 36.Bf7 c3 (36...Rb2!? 37.Ke3 c3 38.dc3 Bc3–/+) 37.dc3+= Bc3 38.g4 Bd4 (38...Rb2 39.Kd3 Bb4 40.g5+=) 39.Ra3 (39.g5 Bc5=) 39...Rb2 (39...g5 40.f5+=) 40.Kd3= Bb6?? (better is 40...c5 41.Ra8 Kh7+=) 41.Bg6+– (41.Bg6 Ba5 42.Ra5 Rb3 43.Kc2+–) 1–0. Plock,Joerg – Biester, Mecklenburg, 1999.

4.c4 Nf6

5.Nc3 Be7 6.d3 0–0 (6...c6 7.Nf3 0–0 8.Be2 Qb6 9.a3 a5=; 6...c5 7.a3 Qb6 8.Na4 Qc6 9.Nc3 0–0=) 7.Nf3 Bf5 (7...Na6 8.a3= c5 9.bc5 Nc5=; 7...c6 8.Be2 Qb6 9.a3 a5=) 8.h3 (8.Be2= a6 9.0–0 Nc6=) 8...e4 (8...Na6 9.a3= c5=; 8...Re8 9.Be2 a5=) 9.Ng5 (better is 9.de4!? Be6+= (9...Bg6 10.Bd3+/–)) 9...ed3 (9...d5 10.cd5 Bb4 11.de4 Be4 12.a3 Bc3 13.Bc3 Bd5 14.Qc2+=) 10.Bd3 Bd3 11.Qd3 Nbd7 (11...h6 12.Nf3=) 12.Nd5+= g6 13.Qc3 (13.Nf3 a5+=) 13...c6 (13...Ne5 14.Nf3 Nd5 15.cd5=) 14.Nf4 (14.Ne7 Qe7 15.Rd1 Rfe8+=) 14...Ne5 15.Rd1 Qd7 (15...a5 16.b5=) 16.Nd3+= Qf5 (16...Nd3 17.Qd3 Rfd8 18.Bf6 Bf6 19.Ne4=) 17.Ne5 Qe5 18.Qe5 de5 19.Be5 Rad8 (19...Bb4 20.Ke2 Be7 21.Bf6 Bf6 22.Ne4+/–) 20.0–0 (20.a3 Rd1 21.Kd1 Nd7+/–) 20...Nd7 21.Bf4 Nb6 (21...Bb4? 22.Bc7 Be7 23.Bd8 Rd8 24.Nf3+–) 22.c5 Nd5 23.a3 ½–½. Diederich,Hauke – Rudolph,Kai, GER–ch U13 Oberhof, 1998.

5.d4 ed4 6.Bd4 Be6 7.Nf3 Nc6 8.Bc3 a6 9.b5 ab5 10.cb5 Na7 11.Be2 Bd7 12.a4 Nb5? 13.ab5+– Ne4 14.Ra8 Qa8 15.0–0 Qa2 16.Bd3 Nc3 17.Nc3 Qa5 18.Nd5 Bb5 19.Bb5 c6 20.Qc2 Kd7 21.Qf5 Kd8 22.Ng5 cb5 23.Nf7 (23.Nf7 Ke8 24.Qe6 Be7 25.Qe7) 1–0. bentengutama – catalinpv (1765), net–chess.com, 2002.

5.d4 e4 6.Nc3 c5 7.dc5 dc5 8.Nd5 cb4 9.Nf6 Qf6?? (better is 9...gf6 10.Qd5 Be7+=) 1–0. color1972 – boldeagle, ChessWorld.net, 2005.

5.Nf3 c6 6.Be2= Be7 7.Qc2 0–0 8.h3 (8.Nc3 Qb6=) 8...h6 (8...e4!? 9.Nh2 d5+=) 9.d3 b5 10.Nbd2 a6 (10...a5 11.ba5 Qa5 12.0–0=) 11.0–0+= Nh7 (11...Re8 12.a3=) 12.a3 Ng5 13.Ng5 Bg5 14.Ne4 (14.c5 Bf5+/–) 14...Be7+= 15.d4 White prepares the advance c5 (15.f4 f5 16.Ng3+=) 15...Bf5? (better is 15...ed4!? 16.cb5 ab5 17.Bd4 Be6+=) 16.de5+/– de5 17.Rad1 (17.Be5 a5+/–) 17...Qc7 (17...Qe8 18.Nf6! Bf6 19.Qf5+/–) 18.Bf3 (18.cb5 a5+/–) 18...Nd7 (18...Be6 19.cb5 ab5 20.Be2+=) 19.c5 (better is 19.Nf6 Bf6 20.Qf5+/–) 19...Nf6?? (better is 19...Be6+=) 20.Nf6+– Bf6 21.Qf5 Rfd8 22.Be4 Kf8 23.Qf3 (23.f4 Rd1 24.Rd1 Qc8+–) 23...Ke7 (23...Rac8 24.Rd8 Rd8 25.Rd1+– (25.Bc6?! e4 26.Qe4 Bb2+–)) 24.Bc6 Rd1 25.Rd1 (25.Qd1?! Qc6 26.Qh5 g6+–) 25...Rd8 26.Rd8 Qd8 27.Qd5 Qd5 28.Bd5 g5 (28...Kd7 29.Bf7 Kc6 30.e4+–) 29.Bb7 e4 (29...Kd7 30.Ba6 Kc6+–) 30.Bf6 Kf6 31.Ba6 (better is 31.c6 h5+–) 31...Ke5 32.Bb5 Ke6 33.Bc4 Kd7 34.b5 f5 35.a4 f4 36.a5 Kc7 37.Bd5 1–0. GuestJWTP – asdferwer, freechess.org, 2017.

4.Bc4 Nf6

5.Nc3 Bc6 6.f3 (6.Bf1!?+=) 6...d5–/+ 7.b5 dc4 8.bc6 Nc6 9.Qe2 Na5 10.Nb1 (10.Nd1 Qd5–/+) 10...Bd6 (10...Qd5 11.f4 Nc6 12.Nc3–/+) 11.Bc3 Nc6 (11...c6 12.Ba5 Qa5 13.Qc4–/+) 12.Qc4+= 0–0 13.Ne2 Re8 (13...Nd7 14.0–0+=) 14.0–0 e4 (better is 14...Rb8!?+=) 15.fe4+= Re4 16.Qb3 b6 (16...Re6!?+=) 17.Bf6+/– gf6 18.Nbc3 Rb4 19.Qd5 Ne7 (19...Ne5 20.Rf6! Ng4 21.Qf7 Kh8 22.Rf3 Bh2 23.Kh1+/–) 20.Qf3 (20.Qh5+/–) 20...Be5 (20...Rh4!? 21.h3 Rh6+/–) 21.d4+– Bd6 22.Qf6 Ng6 (22...Qe8 23.Qg5 Kh8 24.e4+–) 23.Qf7 Kh8 24.e4 Qg5 (24...c5 25.d5+–) 25.e5 Bf8 (25...Be7 26.Nd5 Rf8 27.Qe6+–) 26.Qc7 Nh4 (26...b5 27.Qb7 Re8 28.a4+– (28.Nb5?! Qe3 29.Rf2 Ne5+–)) 27.Rf2 Qe3 (27...b5+–) 28.Qc6 (28.Qc6 Rb8 29.Nd5+–) 1–0. Wall,Bill – Wolfsrus, internet, 2002.

5.Ne2 b5 a5 6.ba5 d5 7.Bb3+= Bd6 8.d4 e4 9.c4 dc4 10.Bc4.

5.Ne2 b5 6.Bb3= Nc6 (6...a5 7.ba5 (7.a3 Nc6 8.ba5 Na5 9.d4 ed4 10.Bd4) 7...c5 8.d3 Nc6 9.0–0 Na5 10.c4) 7.a3 Be7 (7...a5 8.Nec3+= (8.ba5 Na5 9.d4 ed4 10.Bd4) 8...ab4 9.Nd5 ba3 10.Na3) 8.0–0= (8.Nbc3 a5 9.Nb5 Qb8 10.Nbc3) 8...a5 9.c3 (9.f4 0–0= (9...ab4 10.ab4) 10.c4) 9...Bf5 (9...0–0 10.d3+= (10.d4+=)) 10.d3 (10.a4=) 10...0–0 11.Ng3 Bg6 (11...Bg4 12.f3 Bd7 13.Ne4=) 12.f4 ef4 13.ef4 h6 14.Qf3 Qd7 (14...d5 15.f5 Bh7 16.Re1=) 15.Nd2 (15.a4!? ab4 16.ab5+=) 15...a4= 16.Bc2 (16.Ba2=) 16...Rac8 (16...d5 17.Rae1=) 17.Nde4 (17.c4 Nb8+=) 17...Be4 (better is 17...d5 18.Nf6 Bf6=) 18.de4+– Nd8 19.Rad1 (19.Nf5 Kh8+/–) 19...Qc6 (19...c5!? 20.e5 Ne8+/–) 20.Nf5 Re8 21.Qg3 (21.e5 Qf3 22.Rf3 de5 23.fe5 Nh7+–) 21...Bf8 (21...Ne6!? 22.e5 Ne4+–) 22.Nh6 (22.e5 Ne4 23.Nh6 Kh8+–) 22...Kh8 23.Nf5 g6?? (23...Ne6 24.e5 Nh5 25.Qh3+–) 24.Qh3 (better is 24.c4!? Re6 25.Bf6 Rf6 26.Qh4 Kg8 27.Qf6 Ne6+–) 24...Nh7 (24...Kg8 25.e5! de5 26.fe5 Nd5+–) 25.c4 Kg8 26.Nh6 Bh6 27.Qh6 (27.Qc8?! f5 28.Qb8 Nb7+–) 27...Re4 (27...f6 28.Qg6 Kf8 29.Qh7 Qc4 30.Qh6 Ke7 31.Qf6 Kd7+–) 28.Qg7 1–0. Gold,Hamish – Rowell,T, NZL–ch Major op, 1999.

5.Ne2 d5 6.Bb3 Bb4 7.Be5 Bg4 8.c3 Be7 9.h3 Be6 10.Bf6.

4.Nf3 a6

5.a4 Nc6 6.b5= ab5 7.ab5 Ra1 (7...Nb4!?=) 8.bc6+= Rb1? (better is 8...Ra2 9.cd7 Qd7+=) 9.cd7+– Qd7 10.Qb1 1–0. GuestKVMJ – GuestDBJF, freechess.org, 2017.

5.a4 e4 6.Nd4=.

5.Be2 Nf6 6.0–0 Bb5 (6...Be7!?=) 7.c4 Bd7 8.d3 Bc6 9.e4 Qd7 (9...Bd7 10.Nc3+=) 10.a4 b5 (better is 10...Qe7+/–) 11.a5?? (better is 11.ab5!? ab5 12.cb5+–) 11...Bb7 (11...bc4 12.dc4 Ne4 13.Bd3=) 12.c5 (better is 12.cb5!? Qb5 13.d4+/–) 12...Nc6= 13.cd6 Bd6 14.Ba3 (14.Qc1!?=+) 14...0–0 15.Nc3 Nd4 (better is 15...Nb4!? 16.Qb3 c5–/+) 16.Nd4= ed4 17.Nb1 (17.Na2 Qe7 18.f4 Qd7=) 17...Rac8 (17...Qe7 18.Qc2–/+) 18.f4 Ne8 (better is 18...Rce8 19.e5 Nd5 20.ed6 Ne3=) 19.e5+– Be7 20.Bg4 Qc6?? (better is 20...Qd8 21.Bc8 Bc8+–) 21.Bf3 Qf3 (21...Qd7 22.Bb7 Rb8+–) 22.Rf3 (22.Qf3?! Bf3 23.Rf3 f6=) 22...Bf3 23.Qf3 c5 24.Qb7 Nc7 25.bc5 f6 26.Nd2 fe5 27.fe5 Bg5 (28.Ne4 Be3 29.Kh1 Ne6+–; 27...g6 28.Ne4 h6 29.Nd6+–) 0–1. Anden – Midrash, Live Game Caissa's Web, 2004.

4.Nf3 Be7

5.c4 a6 6.Be2 Bf6 (6...Nf6 7.0–0=) 7.Nc3 Ne7 (7...e4 8.Nd4 c5 9.Nc2= (worse is 9.Ne4 cd4 10.Nd6 Kf8+=)) 8.Ne4+= Ng8 (8...Nf5 9.d4+=) 9.Nf6 (9.0–0 Bf5 10.Ng3 Bg6+=) 9...Nf6 10.0–0 Nc6 (10...0–0 11.d4 e4 12.Nd2+=) 11.a3 Ne7 (11...0–0 12.d4 e4 13.Nd2+=) 12.d3 (12.d4 e4 13.Nd2 d5+=) 12...b5 (12...0–0 13.Qc2+=) 13.Nd2 c5 (13...0–0 14.d4 Ng6 15.Qc2+=) 14.Bf3 (14.bc5 Bc6+–) 14...Bc6+/– 15.e4 (15.bc5!? 0–0 16.cb5 ab5 17.Qb3+/–) 15...Ng6= 16.g3 (16.Rc1 Rb8=) 16...0–0 17.Bg2 Qc8 (17...Qb6 18.bc5 dc5 19.f4=) 18.bc5 (18.f4 Re8+=) 18...dc5= 19.Nb3 (19.f4 Ng4 20.Qe1 ef4 21.gf4 f5 22.cb5 ab5=) 19...bc4 20.dc4 (20.Nc5 Rb8 21.Rb1 Rd8–/+) 20...Rd8 (20...Rb8!? 21.Rb1 Be4 22.Be4 Ne4–/+) 21.Qc2+= Ba4 (21...Rb8 22.Nc5 Be8 23.Nd3 Rd3 24.Qd3 Rb2 25.Rfb1 Rb1 26.Rb1+=) 22.Qc3 Bb3 (22...Rb8 23.Na5+=) 23.Qb3= Rb8 24.Qc2 Qb7 (24...Nd7=) 25.Bc3 (better is 25.Rab1!? Qb3 26.Qc1+=) 25...Qb3–/+ 26.Qb3 (26.Rfc1 Qc4 27.f4 ef4 28.Bf6 Qc2 29.Rc2 gf6+=) 26...Rb3 27.Ba5 Rd4 28.Rfc1 (28.Rfb1 Rb1 (28...Rc4?? 29.Rb3 Ra4 30.Rb8 Nf8 31.Bc7+–) 29.Rb1 Rc4 (29...Ne4?! 30.Rb8 Nf8 31.Be4 Re4 32.Bc7=) 30.Rb8 Nf8–/+) 28...Ne4 29.Rab1 (29.Be4 Re4 30.Bc7 Rd4–/+) 29...Rb1 (29...Rc4 30.Be4 Rb1 31.Rb1 Re4 32.Rb8 Nf8 33.Bc7–/+) 30.Rb1–/+ Rc4 31.Be4 (31.Rb8 Nf8–+) 31...Re4 32.Rb8 Nf8 33.Ra8 (33.Rc8 f6–/+) 33...f5 34.Ra6? (34.Bb6 Rc4 35.Bc7 Kf7 36.Be5 Nd7+=) 34...f4?? (better is 34...Ra4!?–+) 35.Bc7 (35.Rc6 Nd7–/+) 35...fg3 (35...f3!? 36.Kf1 Re2–+) 36.hg3–/+ g6 (36...Nd7!?–/+) 37.Bd6 (37.f3 Re2 38.Kf1 Ra2=) 37...Nd7 (37...Ne6 38.Kf1=) 38.Ra7+= Nf6 39.Bc5 Rc4 40.Be7 (40.Be3 Nd5+=) 40...Ne4= 41.Kg2 (41.Bd8 Rc2 42.Bb6 Nd2+=) 41...Rc2 Attacking the backward pawn on f2 42.Kf3 Nf2 43.Bf6 Nd3 (43...e4 44.Kf4=) 44.Ke3+= e4 (44...Rc6!? 45.Kd3 Rf6+=) 45.Ke4+/– Nf2 46.Ke3 (46.Kd5!?+/–) 46...Ng4+= 47.Kd3 Rc6 (47...Rf2!? 48.Bd4 Rf3 49.Ke4 Rg3+=) 48.Bd4+/– Rd6 (48...h5 49.Ke4+/–) 49.Kc4 (49.Ke4+/–) 49...Nh2 (49...Nf6!?+/–) 50.Rg7+– Kf8 51.Rh7 Nf3 (51...Nf1 52.Bc5 Kg8 53.Bd6 Kh7 54.Kd3+–) 52.Rh8 (52.Bc5!? Nd2 53.Kb5 Kg8 54.Bd6 Kh7+–) 52...Kf7+/– 53.Rh7 Ke8 (53...Kf8 54.Bc5 Nd2 55.Kb5+–) 54.Rh8 (54.Be3 Ne5 55.Kb5 Rd3+/–) 54...Kf7 55.Rh7 Ke8 56.Rh8 (better is 56.Be3+–) 56...Kf7= ½–½. GuestBZBN – tleylan, freechess.org, 2017.

5.c4 Nf6 6.b5 0–0 7.Be2 c6 (7...e4 8.Nd4=) 8.a4 a6 9.Nc3 ab5 10.ab5 Ra1 11.Qa1 cb5 12.cb5 Be6 13.Ng5 (13.Qa7 Qc7+=) 13...h6 (better is 13...Bf5!?=) 14.Ne6+/– fe6 15.Bf3 (15.Qa7 Qc7+/–) 15...Qc7 (15...d5 16.0–0=) 16.0–0 Nbd7 17.Ne4 (17.d4 d5+=) 17...Ne4= 18.Be4 Nc5 19.Rc1 (19.Bc2!?+=) 19...Qb6= 20.Bf3 (20.Bc2 Qb5 21.Bc3 Bf6+=) 20...Nd3 (20...Qb5 21.Qb1+=) 21.Rc3+= Nb2 (21...Qb5 22.Rc7 Bh4 23.Rb7+=) 22.Qb2= Bf6 23.Qb3 d5 24.Rc2 d4 (24...e4!? 25.Be2 Ra8=) 25.Qd3 Ra8 26.g3 de3 27.fe3 Ra5?? Attacks the isolani on b5 (better is 27...Rd8 28.Qb3 Kf7+=) 28.Rc8+– Bd8 29.Qg6 (better is 29.Rd8 Qd8 30.Qd8 Kf7 31.Qa5+–) 29...Ra1 (29...Qd6 30.Qe8 Qf8 31.Qe6 Kh7 32.Qd5 Ra1 33.Kg2+–) 30.Kg2 Qd6 31.Qe8 Qf8 32.Qe6 Kh8 33.Qd7 Rf1 (33...e4 34.Rd8 ef3 35.Kf2 Qd8 36.Qd8 Kh7+–) 34.Rd8 (34.Rd8 Rf3 35.Rf8 Rf8 36.Qb7+–) 1–0. GuestRCFM – cellovek, freechess.org, 2017.

5.c4 Nf6 6.Nc3 Bf5=.

5.c4 Nf6 6.Be2 0–0 7.b5 b6 (7...e4 8.Nd4+=) 8.Nc3= c6 (8...a6 9.0–0=) 9.a4 (9.d4 e4 10.Nd2 cb5 11.Nce4 Ne4 12.Ne4 bc4 13.Bc4 b5+=) 9...c5 (9...e4 10.Nd4=) 10.Qc2 (10.d4 ed4 11.ed4 Re8+=) 10...g6 (10...a6 11.0–0=) 11.h3 (11.0–0 a6+=) 11...Bc8 (11...a6 12.0–0+=) 12.d4 ed4 13.ed4 Bb7 (13...Re8 14.0–0+=) 14.d5+/– Nbd7 15.0–0 Nh5 (15...a6 16.Rfe1+/–) 16.Ne4 (16.Rae1 a6+/–) 16...Bc8 (16...f5 17.Qc3 Ndf6 18.Ned2+/–) 17.Nh2 (17.Rfe1 a6+/–) 17...Ng7 (17...Nf4 18.Ng4 Re8 19.Bf3+–) 18.Qc3 (18.Ng4 a6+/–) 18...f6 19.Ng4 (19.Rfe1 a6+/–) 19...Ne5 (19...Nf5 20.Rae1 Nd4=) 20.Nh6 Kh8 21.f4 Nf7 22.Ng4 Bf5? (better is 22...Nf5+–) 23.Nef6 Bf6 (23...Bg4 24.Ng4 Rg8+–) 24.Nf6 (24.Qf6?! Qf6 25.Nf6 a6+–) 24...Rc8 (24...Rg8+–) 25.Nh5 Rg8 (25...Ne5 26.Ng7 Kg7 27.fe5+–) 26.Ng7 (26.Ng7 Ne5 27.Nf5 gf5 28.fe5+–) 1–0. GuestDZJW – nexin, freechess.org, 2017.

3.e3 Nd7

4.a3 A) 4...Ngf6 5.Nf3 Be7 6.Be2 0–0 7.0–0 a5 8.b5=; B) 4...d5 5.c4 (5.Nf3 e4 6.Nd4 a5 7.ba5 c5 8.Nb5=) 5...Ngf6 6.Qb3 c6 7.cd5 cd5 8.Nc3=; C) 4...a5 5.Nf3 Ngf6 6.Be2 Be7 7.0–0 0–0 8.b5=.

4.a4 a6 5.c4 (5.d4 Ngf6+=) 5...c5 (5...Ngf6 6.d4+=) 6.b5 (6.bc5 dc5 7.d4 cd4 8.ed4 ed4 9.Bd4 Ngf6+=) 6...a5 (6...Ngf6 7.Be2+=) 7.g3 (7.d4 Ngf6=) 7...b6 (7...Nb6 8.d3=) 8.Bg2+= Rb8 9.Ne2 Ngf6 10.0–0 Be7 11.d4 (11.f4 ef4 12.Nf4 Ne5+=) 11...ed4 (11...cd4 12.ed4 Bb7 13.Bc6=) 12.ed4+= 0–0 13.Nbc3 White plans d5 (13.Nf4 Re8+=) 13...Bb7= 14.d5 Ne5 (14...Re8 15.f4+=) 15.Qb3 (15.f4 Ned7+=) 15...Nd3= 16.Rad1 (16.Ba3 Bc8=) 16...Nb2 17.Qb2 Bc8 (17...Qc7 18.Rfe1=) 18.Rfe1 Bf5 (18...Re8 19.Nf4=) 19.Nf4+= Re8 20.Qd2 (20.h3 Rb7=) 20...Nd7 21.Be4 Be4 (21...Ne5 22.Nd3 Nc4 23.Qa2 Be4 24.Re4=) 22.Ne4+= Ne5 23.Qc3 Bg5 24.Ng5 (24.Ng2 Be7+=) 24...Qg5= 25.Kg2 Qf5 26.Re3 Kf8 (26...Ng4 27.Rf3=) 27.Rde1 f6 (better is 27...Re7!?=) 28.Ne6+/– Kf7 29.h3 h5 (29...Kg8!?+/–) 30.f4+– Ng6 31.Qd3 (31.Re4!?+–) 31...Qd3+/– 32.Rd3 Nf8 (32...Re7 33.Re4+/–) 33.Rde3 Ng6 34.Kf3 (34.g4 Re7+/–) 34...f5 (34...Re7 35.g4 Rh8 36.Ke4+/–) 35.R1e2 (better is 35.Ng5 Kf8 36.Re6+–) 35...Rbc8? (better is 35...Kf6+/–) 36.Ng5+– Kf8 37.Re6 Re6 (37...Nh8 38.Rd6 Re2 39.Ke2+–) 38.Re6 (38.Ne6?! Kg8+–; 38.de6?! Ke7+/–) 38...Ne7 (38...Nh8 39.Rd6 Rb8 40.Rd7+–) 39.Rd6 Rb8 40.g4 (better is 40.Rd7 Ke8 41.Ra7 Rd8+–) 40...fg4 (40...hg4 41.hg4 Ke8 42.Ne6+–) 41.hg4 hg4 42.Kg4 g6 (42...Ng8 43.Rg6 Nh6 44.Kf3+–) 43.Nf3 (43.Rf6 Ke8+–) 43...Kg7 (43...Nf5 44.Rf6 Kg7+–) 44.Ne5 Kh6 45.Nc6 (better is 45.Rf6!? Nc8+–) 45...Nf5 46.Re6 (46.Nb8?! Nd6 47.Nd7 Nc4+–) 46...Rb7 47.Ne5 Ne3 48.Kf3 Nf5 49.Rg6 Kh7 50.Ke4 Ne7 (50...Nd4 51.d6 Rb8 52.d7+–) 51.Re6 Nc8 52.d6 Nd6 53.Rd6 Kg7 54.Rd7 Rd7 55.Nd7 1–0. Ruhle,Ernst Albrecht – Freiburghaus,Simon, Pizol op, 1998.

4.a4 d5 5.Nf3 e4 6.Nd4=.

4.a4 Ngf6 5.Nf3 g6 (5...Be7 6.Bc4+=) 6.Be2 Bg7 (6...Nd5 7.c3=) 7.0–0 0–0 8.c4 (8.d4 a5 9.de5 de5 10.Ne5 ab4=) 8...a5 (8...e4 9.Nd4=) 9.b5= Nc5 (9...e4 10.Nd4=) 10.d4+= ed4 11.Nd4 (11.ed4 Nfe4=) 11...h5 (11...Re8 12.Nc3=) 12.Nd2 (12.Bf3 Be6 13.Ne6 fe6+=) 12...Re8 13.N4b3 (13.N2b3 Nfe4 14.Bf3 Nb3 15.Qb3 Nd2–/+) 13...Qe7 (13...Nb3 14.Nb3 Qe7 15.Bf3+=) 14.Nc5+= dc5 15.Bf3 Rd8 (15...Bg4 16.h3 Bf3 17.Qf3= (worse is 17.gf3 Rad8–/+)) 16.Qc1 (16.Qe2 Rb8+=) 16...Rb8 (16...Ra7 17.Rd1+=) 17.Rd1 Bf5 18.Bc3 b6 19.Be2 (19.Qb2 Qe6+=) 19...Bd3 (19...Rd7 20.Nf3=) 20.Bd3+= Rd3 21.Nf3 Rd1 22.Qd1 Rd8 23.Qc2 Qe4 24.Qb2 Rd6 25.Be5 Ne8 (25...Re6 26.Rc1+= (26.Bc7? Ne8 27.Be5 Be5 28.Ne5 Qe5 29.Qe5 Re5–+)) 26.Bg7 Ng7 27.Qc1 (27.Nd2 Qg4+=) 27...Nf5 28.h3 (28.Rb1 h4=) 28...f6 (28...c6 29.Qc3=) 29.Ra2 g5 (29...Nh4 30.Nh4 Qh4 31.Qc2=) 30.Rd2+= g4 Black begins to deal mighty blows 31.hg4 hg4 32.Ne1 (better is 32.Rd6!? Nd6 33.Nd2+=) 32...g3+= 33.Re2 gf2 34.Kf2 Qh4 35.Kg1 Ng3 36.Rd2?? (better is 36.Rb2+=) 36...Qh1 0–1. Rebber,Christian (2150) – Gofshtein,Leonid D (2515), Recklinghausen op, 2001.

4.b5 d5 5.Nf3 Bd6 6.Be2=.

4.b5 g6 5.c4 (5.Nf3 Bg7=) 5...Bg7+= 6.Nf3 f5 (6...Ne7 7.d4=) 7.Qc2 (7.d4 ed4 8.Be2 Ngf6 9.Bd4 0–0+=) 7...Ngf6 8.a4 (8.d4 ed4 9.ed4 0–0+=) 8...0–0 9.Nc3 b6 (9...e4 10.Nd4 Ne5 11.d3+=) 10.d4 Bb7 11.de5 de5 12.Rd1 Qe7 (12...Bf3 13.gf3 Qe7 14.Nd5+=) 13.Nd5+= Qc5 (13...Nd5 14.cd5 (worse is 14.Rd5 e4 15.Bg7 Qg7–/+) 14...Qb4 15.Bc3=) 14.Qb3 (14.Nf6!? Nf6 15.Ne5+/–) 14...Bd5 (14...Rad8!?=) 15.Ba3 (15.Ba3 Bf3 16.gf3+–) 1–0. Sundin,Tommy – Johansson,Mattias, Hudiksvall SVE, 1989.

4.c3 d5 5.d4 e4 6.Nd2 (6.a3 Bd6+=) 6...Ngf6 7.Qc2 (7.a3 Bd6+=) 7...Bd6–/+ 8.a3 a6 (8...a5 9.c4 ab4 10.c5+=) 9.c4+= c6 10.cd5 cd5 11.Ne2 0–0 12.Nc3 b6 (12...a5 13.Nb5 Be7 14.Nc7+=) 13.Be2 (13.Nd5 Nd5 14.Qc6 Ne3 15.fe3 Qh4 16.Kd1+–) 13...Bb7 (13...a5 14.ba5 Ra5 15.Nb5=) 14.0–0 Rc8 (14...Qc7 15.f4=) 15.f3 (15.Rac1 Re8=) 15...Re8 (15...ef3 16.Bf3 Qc7 17.g3=) 16.fe4= de4 (16...Ne4 17.Nde4 Re4 18.Qd3+=) 17.Qb3 (17.Rac1 Qc7 18.h3 Bh2 19.Kh1 Qd6=) 17...Qc7+= 18.h3 b5 (18...Bh2 19.Kh1+=) 19.Rac1= Qb8 (19...Qd8 20.a4=) 20.Bh5 (20.Bg4 Re7 21.Bf5 Bh2 22.Kh1 Kh8+=) 20...Bh2 (20...Rf8 21.Be2=) 21.Kh1 Rc4?? (21...Re7!? 22.Be2 Qd6=) 22.Bf7 Kf7 23.Nc4 bc4 24.Qc4 Ke7 25.Qe2 Nb6 (25...Bd6 26.Na4+/–) 26.Rc2 (26.b5 ab5 27.Nb5 Bd5+=) 26...Bc8 (26...Qg3 27.b5+=) 27.Qf2 (27.b5!?+/–) 27...Bg3 28.Qe2 (28.Qg1 Nbd5=) 28...Be6 (28...Bh2 29.b5+/–) 29.Rfc1 (29.Nd1!?=) 29...Bc4+= 30.Qd2 (30.Qd1 Bb3 31.Qe2 Bc2 32.Qc2–/+) 30...Bd3–/+ 31.Ne2 Bc2 32.Qc2 (32.Ng3 Qg3 33.Qc2 Nbd5–+) 32...Rc8 (32...Nbd5 33.Qd2–+) 33.Qb3 (33.Nc3 Kd8–+) 33...Rc1–+ 34.Bc1 (34.Nc1 Nbd5–+) 34...Bd6 (34...Qd6 35.Qc2–+) 35.Nc3 Qc7 36.Bb2 (36.b5 ab5 37.Bb2 Qc4 38.Qb5 Qb5 39.Nb5 Nfd5–+) 36...Nc4 (36...Qc4 37.Qd1–+) 37.Na4 Nb2 (37...Ne3 38.Qe3 Qc2 39.Nc5 Qb2 40.g3–+) 38.Qb2 (38.Nb2 Qc1 39.Nd1 Qd2–+) 38...Qc6 (38...Qc4 39.Kg1–+) 39.Nc5–/+ Bc5 40.dc5 Qd5 41.Qd4 (41.g4 Qd3 42.g5 Ne8–/+) 41...Qd4 Black gets the initiative 42.ed4 Kd7 (42...Ke6 43.Kg1–/+) 43.Kg1 Kc6 44.Kf2 Nd5 45.Ke2 (better is 45.g3 e3 46.Ke2–/+) 45...Kb5–+ 46.Kd2 Ka4 47.c6 Ka3 48.c7 Nc7 49.Ke3 Kb4 50.Ke4 a5 (50...a5 51.g4 Nb5–+) 0–1. Tcheau,Alain – Bays,Robert, SUI–ch op2 Luzern, 1994.

4.Nc3 Ngf6+= 5.Nf3 h6 (5...d5 6.a3=) 6.d4 (6.e4!?=) 6...e4+= 7.Nd2 d5 8.a3 Nb6 (8...a5 9.b5+=) 9.Be2 c6 10.0–0 Bd6 11.f3 Bb8 (11...ef3 12.Bf3 Qc7 13.h3=) 12.fe4 Ne4 (12...de4 13.Nce4 Ne4 14.Ne4=) 13.Nde4 (13.Nce4 de4 14.Qe1 Nd5=) 13...de4= 14.Bh5 (14.Qe1 Qg5 15.Qf2 f5=) 14...g6 (14...Be6=) 15.d5 (15.Be2 f5=) 15...cd5 (15...Qh4 16.d6 gh5=) 16.Ne4= Qc7 17.Ng3 (17.Bh8? Qh2 18.Kf2 de4–+) 17...Rg8 18.Bf3 Attacking the isolated pawn on d5 18...h5 (better is 18...Qe7!?=) 19.Bd5+/– Nd5 20.Qd5 Be6 21.Qb5 Qc6 (21...Qd7!? 22.Qd7 Kd7+/–) 22.Qc6+– bc6 23.Ne4 Rf8 (better is 23...Ke7!?+/–) 24.Bg7+– Ke7 (24...f5 25.Bf8 Kf8 26.Nc5+–) 25.Bf8 Kf8 26.Rad1 Be5 (26...Ke7 27.Nc5+–) 27.Nc5 Ke7 28.Ne6 Ke6 29.Rd2 (29.c4 f5+–) 29...Rb8 (29...a5 30.ba5 Ra5 31.Rd3+–) 30.Rfd1 Rb7 (30...a5 31.ba5 Ra8 32.Rd8 Ra5 33.Re8 Kf6 34.e4+–) 31.Kf2 (31.Rd8 f5+–) 31...f5 32.h4 Ke7 (32...a5 33.ba5 Rb5 34.Rd8 Ra5 35.Re8 Kf7 36.Rc8+–) 33.Kf3 Bb2 (33...Ke6 34.c4+–) 34.Rd6 (34.Rd3 Ke8+–) 34...Ba3 35.Rc6 Bb4 (35...Rb4 36.Ra1 Ra4 37.Rg6+–) 36.Rg6 Kf7 (36...Rb5 37.Rb1 Rb8 38.Rg5+–) 37.Rg5 (37.Rh6 Be7+–) 37...Rb5 (37...Ke6 38.Rb1 Rb8 39.e4 fe4 40.Ke4+–) 38.Rh5 (38.Rd7 Kf6 39.Ra7 Rc5 40.Rh5 Rc4 41.Ra6 Kg7 42.Rg5 Kh7+–) 38...Kg6 (38...a5 39.Kf4 Ke6 40.Rh6 Ke7 41.Rc6+–) 39.Rg5 Kf6 40.Rb1 a6 (40...Rb6 41.e4 fe4 42.Ke4 Re6 43.Kd5 Rd6 44.Kc4+–) 41.e4 fe4 42.Ke4 Rb6 43.g4 Re6 44.Kd5 (better is 44.Kd4 a5 45.Rf5 Kg7 46.c4+–) 44...Bd2 (44...Rd6 45.Kc4 a5 46.Rf1 Ke7 47.Re5 Kd8+–) 45.Rf1 Ke7 46.Rg7 1–0. Wall,Bill – Toby, internet, 2005.

4.Bc4 Ngf6+= 5.Nf3 (5.Nc3 Nb6 6.Be2 d5+=) 5...Be7 (better is 5...d5 6.Bb5 c6–/+) 6.Bf7? (better is 6.a3=) 6...Kf7–+ 7.Ng5 Kg8?? (better is 7...Kg6 8.Ne6 Qg8 9.Nc7 Rb8–+) 8.Ne6+/– Qe8 9.Nc7 Qd8 (9...Qg6 10.Na8 Qg2 11.Rf1=) 10.Na8 b6 (10...b5 11.Qf3 e4+/–) 11.Qe2 (11.Qf3!? e4 12.Qg3+/–) 11...Bb7+= 12.Nb6 (12.f4 Qa8 13.0–0 e4=) 12...Qb6= 13.f4 (13.a3!? Bg2 14.Rg1=) 13...Qb4+= 14.Bc3 Qe4 15.0–0 ef4 (15...Qc2!? 16.Na3 Qg6+=) 16.Rf4= Qc2 17.Na3 (17.Qb5 Be4=) 17...Qg6+= 18.Rc1 (18.Bd4 a6+=) 18...d5 (18...Nc5 19.Rb1 Nd5 20.Qc4+/–) 19.Nc2 (19.Bb4 Bd8=) 19...h6 (19...Bd6 20.Rff1+=) 20.Nd4 (20.Qb5 Nb6 21.Bd4 Ne4=) 20...Nc5 (20...Kh7 21.Nf5 Ba3 22.Nh4+=) 21.Nf5 Bf8 22.Bf6 Qf6 23.Rcf1 (23.Nd4 Qa6 24.Rf8 Kf8 25.Rc5 Qe2 26.Ne2+–) 23...Qg6?? (23...Ba6 24.Qf3 Bf1 25.Qd5 Qe6 26.Qe6 Ne6 27.Rf1–/+) 24.Qf3?? (better is 24.Nh4 Qe6 25.Rf8 Kh7 26.Rh8 Kh8 27.Qb5+–) 24...Qc6?? (better is 24...Ne6 25.Nh4 Qe8=) 25.Nd4+–. Zilahi,Gabor (2115) – Mravik,Katalin (2000), Budapest FS03 FM–B, 2002.

4.d3 Ne7 5.Nf3 Ng6 6.Be2 Be7 7.0–0 0–0 8.c4 b6 9.Nc3 Bb7 10.Nd5 Nh4 11.Ne7 Qe7 12.Nh4 Qh4 13.g3 Qh3 Threatening mate: Qg2 14.e4 Qe6 (14...f5 15.f4+=) 15.f4 Qe7 16.Qc2 f5 17.fe5 Ne5 18.Rf5 Rf5 19.ef5 Nf3 (better is 19...Rf8=) 20.Kf2?? (better is 20.Bf3 Bf3 21.Qf2+/–) 20...Re8–+ (20...Nh2?! 21.Re1 Qg5 22.d4+=) 21.Bf3 Qe3 22.Kf1 Qf3 (22...Bf3?! 23.c5–/+) 23.Qf2 Qd3 24.Kg1 Re2 (24...Qc4?! 25.f6 Qd5 26.f7 Qf7 27.Qf7 Kf7 28.Rf1 Kg6 29.Rf4–+) 25.Qd4 The mate threat is Qxg7 25...Rg2 26.Kh1 0–1. Jew,Harold – Alvarez,Alfonso, St Valentine's Day U1900, 2001.

4.Bd3 c5 5.b5 Ngf6 6.c4 Nb6 7.Nc3 Be6 8.Qe2 d5 9.cd5 Nfd5 10.Nf3 f6 11.a4 a5 (better is 11...Nb4!? 12.Bb1 Bc4–/+) 12.ba6+= ba6 13.a5 (13.Nd5!? Nd5 14.Ba6=) 13...Nb4+= 14.Be4 N6d5 (14...Nc4 15.Ba3 f5 16.Ba8 Nc2 17.Kd1 Na1 18.Bc6 Kf7 19.Bd5 Na3 20.Ne5 Kf6 21.Qa6–/+) 15.Nd5 (15.0–0!?+=) 15...Bd5+= (worse is 15...Nd5 16.0–0+=) 16.Bd5 Qd5 17.0–0 Nd3 18.Bc3 e4 19.Ne1 Bd6 20.Nd3 ed3 21.Qg4 Be5 22.Qa4 (22.Qg7?! Rg8 23.e4 Rg7 24.ed5 0–0–0=) 22...Ke7 23.e4 Qd6 24.Be5 fe5 25.Rab1 Rab8 26.Rb3 Rb3 27.Qb3 Rc8 (better is 27...Rb8!? 28.Qd1 Kf7+=) 28.Rb1 c4 29.Qc3 Qc7 30.Rb6 Rb8?? (better is 30...Qc5=) 31.Qb4+– Kf7 32.Rb8 c3 (32...Kg6 33.Rb7 Qd8 34.Qc4+–) 33.Qf8 (33.Rb7 Qb7 34.Qb7 Ke8 35.Qc8 Ke7 36.Qc3 Kf6 37.Qd3 Ke7+–) 33...Kg6 34.Rb6 Qb6 35.ab6 cd2 36.Qf5 (36.Qd6 Kg5 37.Qd3 Kf4 38.g3 Kg4 39.b7 d1Q 40.Qd1 Kg5 41.b8Q Kh6 42.Qbd6 g6 43.Qf8 Kg5 44.h4) 36...Kh6 37.Qf3 g5 38.Qd1 (38.Qf6 Kh5 39.g4 Kg4 40.Qf5 Kh4 41.Qh7 Kg4 42.Kg2 d1Q 43.Qh3 Kf4 44.Qf5) 38...a5 (38...Kg7 39.b7 Kg8 40.b8Q Kg7 41.Qe5 Kg6 42.Qe8 Kg7 43.Qa1 Kh6 44.Qf6) 39.Qd2 (39.b7 Kg7 40.b8Q h6 41.Qe5 Kh7 42.Qe8 Kg7 43.Qa1 Kh7 44.Qf7) 39...Kg6 40.Qd3 1–0. Aslan,Ziver – Dogan,Aydin, TUR–ch op Antalya, 2008.

4.d4 ed4 5.Bd4= Ngf6 6.c4 c5 7.Bc3 cb4 8.Bb4 Qb6 9.a3 Be7 10.Nf3 0–0 11.Bd3 Re8 12.0–0 Ne5 13.Ne5 de5 14.Be7 Re7 15.Nc3 Be6 16.Nd5 Bd5 17.cd5 Rd8 18.e4= Ne8 19.Rb1 Qg6 20.Qa4 a6 21.Rfc1 h5 22.Qb4 Red7+= 23.Qb6 Nf6 24.a4 h4 25.h3 Qh6 26.Rc7 Qd2 27.Bc2 Ne8 28.Rc5 Nd6 29.Rd1 Qf4 30.Rc3 f6 31.f3 Rf7?? 32.Qd8+– (32.Qd8 Kh7 33.Qd6+–) 1–0. Loulou – Wobbly, playchess.de, 2003.

4.d4 Ngf6 (--> 1.b4 e5 2.Bb2 d6 3.e3 Nf6 4.d4 Nbd7).

4.Be2 Ngf6 5.Nf3 b6 6.Ng5 Bb7 7.Bf3 Bf3 8.Qf3 Be7 9.Qc6 0–0 10.Nc3 e4 11.Nce4+= Ne5 12.Nf6 Bf6 13.Be5 Bg5 14.Bb2 Re8 15.0–0 Bf6 16.d4 Re7 17.c4 Rb8 18.a4 Qd7 19.Qf3 Ree8 20.b5 g6?? 21.a5 Bg7 22.a6 Re6 23.Rab1 Rf6 24.Qd5 Rf5 25.Qe4 Re8 26.Qd3 Rh5 27.Rfe1 Qg4 28.e4 Qh4 29.h3 Rg5? 30.Re3 Bh6 31.Rg3?? Qe4 32.Qe4 Re4 33.Rg5 Bg5 34.f3 Re2 35.Bc3 Be3 36.Kh1 Rc2 37.Be1? Rc4 38.d5 Kg7 39.Bg3 Rc5 40.Kh2 Rd5 41.f4 f5 42.Re1 Bc5?? 43.Re7= Kh6 44.Bh4 Bf2?? 45.Bg5 1–0. OPA – JesusResign, Live Game Caissa's Web, 2004.

4.Nf3 f6 5.Bc4 Ne7 6.Nc3 c6 7.e4 Nb6 8.Bb3 d5 9.ed5 Ned5 10.Nd5 Nd5 11.a3 Bg4 12.h3 Bh5 13.0–0 Be7 14.d4 (14.Re1!?=) 14...e4+= 15.g4 Bg6 (worse is 15...ef3 16.gh5 a5 17.c3+=) 16.Nh4 Qd6 17.Qd2 0–0–0 18.c4 Nf4 19.c5 (19.Qe3 Nd3 20.Bc3 Qf4=) 19...Qc7 (19...Nh3 20.Kg2 Nf4 21.Kg3 Nh5 22.Kg2 Qd7=) 20.Nf5? (better is 20.Qe3+=) 20...Nh3–+ 21.Kh1 (21.Kg2 Nf4 22.Kh1 Nd5–+) 21...Bf5 (21...h5 22.Kg2 hg4 23.Ne7 Qe7 24.Qe3–+) 22.gf5 Ng5 23.Qe3?? (23.Be6 Kb8 24.f4 Ne6 25.fe6–+) 23...b6 (better is 23...Nf3 24.Qf3 ef3–+) 24.f4 (better is 24.cb6 ab6 25.Rg1–/+) 24...h6?? (better is 24...ef3 25.cb6 Qg3–+) 25.Rf2 (25.cb6 ab6 26.Rfc1 Bd6 27.Rc6 Qc6+/–) 25...Nh7+= 26.Be6 Kb8 27.Qe4 (better is 27.cb6 Qb6 28.Qe4+/–) 27...g5?? (27...bc5 28.bc5 Ka8+=) 28.d5 (better is 28.fg6 f5 29.Qf5+–) 28...gf4?? (better is 28...cd5 29.Bd5 bc5=) 29.d6+– (worse is 29.Rf4 cd5 30.cb6 ab6= (worse is 30...de4 31.bc7 Kc7 32.Rc1 Kb8 33.Re4+/–)) 29...Bd6 30.cd6 Qd6 (30...Rd6!? 31.Re1 Ng5+/–) 31.Qf4 (31.Rf4?! Qd2 32.Bd4 Ng5+/–) 31...Qf4 32.Rf4 1–0. Djakov,Joao – Wang,Qinq Wei (2200), Internet Section, 2004.

4.Nf3 h6 5.c4 g5 6.h3+= Bg7 7.Nc3 Ngf6 8.Bd3 c6 9.0–0 Qc7 10.Qc2 g4 (10...0–0!?+/–) 11.hg4+– Ng4 12.Nh4 Nb6 13.Nf5 Bf8 14.f3 Nf6 15.Ne4 Ne4 16.fe4 (16.Be4?! Be6 17.c5 dc5+=) 16...Bf5 17.Rf5 (17.ef5?! 0–0–0+/–) 17...0–0–0 18.a4 Bg7 19.a5 Na8 20.a6 b6 21.Be2 f6 22.d4 Kb8 23.Bh5 (23.c5 h5+–) 23...Qe7 24.Qa4 ed4 25.Qc6 Rc8? (25...Qd7 26.Qd7 Rd7 27.ed4 Nc7+–) 26.Qd5 de3 (26...Rhe8 27.Be8 Re8 28.ed4 h5+–) 27.e5! de5 (27...de5 28.Bf3 Combination; 27...fe5 28.Rf7 Combination) 28.Bf3 Kc7 (28...e2 29.Qa8 Kc7 30.Qa7 Kd8 31.Qb6 Qc7+–) 29.Rd1 1–0. Janek – Bonnie, internet, 2016.

4.c4

4.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nd7 4.e3).

4.c4 Ngf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Nbd7).

4.c4 Ngf6 5.Nc3 g6 6.Nf3 Bg7 7.d4 0–0 8.Be2 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d6 6.d4 e5 7.Be2 Nbd7 8.Nc3).

4.c4 g6 5.Nf3 Bg7 6.Be2 Ngf6 7.0–0 0–0 (-->1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d6 6.Be2 e5 7.0–0 Nbd7).

4.c4 g6 5.Nf3 Bg7 6.Be2 Ngf6 7.d3 0–0 (-->1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d6 6.Be2 e5 7.d3 Nbd7).

4.Nf3 c6

5.c4 Ngf6 6.d4 e4 7.Nfd2 d5 8.a3 Bd6 9.Nc3 Nf8 10.Rc1 Qe7 (10...Ne6 11.cd5 cd5 12.Be2=) 11.Be2 Ng6 12.cd5 cd5 13.Nb5 Bb8?? (better is 13...0–0+=) 14.Rc8+– (14.Rc8 Kd7 15.Rh8 Nh8 16.0–0+–) 1–0. pierred (2800) – mgilbert (2115), net–chess.com, 2016.

5.d3 Ngf6 6.c4 Qc7 7.Be2 Be7 8.Nc3 0–0 9.0–0 Re8 10.Qb3 Nf8 11.Rac1 Ng6 12.Rfd1 Bd7 13.a4 White prepares b5 13...a6 (13...c5 14.Nb5 Qb8 15.bc5 dc5 16.a5=) 14.b5 (14.d4 Bg4=) 14...Qb6 (14...ab5 15.ab5 Bg4 16.Ra1=) 15.Ra1 (15.d4 ed4 16.Nd4 Ne5=) 15...ab5 16.ab5 Rec8 17.Ra4 Rd8 (17...Ra4 18.Na4 Qd8 19.Nc3=) 18.Rda1 Be6 1–0. Puentes,Alvaro (2090) – Quinonez,Maria Constanza (1755), Bogota COL, 6th Open, 2012.

5.Be2 Ngf6=.

4.Nf3 Be7

5.c4 f5 6.d4 e4 7.Nfd2 Ngf6 8.Be2 0–0 9.Nc3 c6 10.c5 d5 11.b5 Qc7 12.a4 b6 13.bc6 Qc6 14.cb6 ab6 15.0–0 Ba6 16.Bb5 Bb5 17.Nb5 Ra5 18.Qb3 Kh8 19.Rfc1+= Qb7 20.Rc7 Qa8 21.Bc3 Ra6 22.Rd7!+/– Nd7 23.Nc7 Qb7 24.Na6 Qa6 25.Qb5 Qb7 26.Bb4 Bb4= 27.Qb4 Rc8 28.g3 Qa6 29.Qb5 Qb5 30.ab5 Kg8 31.Ra7 Rd8 32.Nb1 Kf8 33.Nc3 Nf6+= 34.Na4 Rb8 35.Ra6 Nd7+= 36.Nc3 Nf6 37.Na4 Nd7 38.Ra7 Ke8 39.Kg2. slavisa10 – bashful, Live Game Caissa's Web, 2004.

5.c4 Bf6 6.Be2 (6.d4 ed4 7.Bd4 Nh6=) 6...e4+= 7.Bf6 Qf6 (worse is 7...gf6 8.Nd4+=) 8.Nd4 c5 9.bc5 dc5 10.Nb3 a5 11.Nc3 a4 12.Ne4 (better is 12.Nc1 Qc6 13.Qc2=) 12...Qg6?? (better is 12...Qe7 13.Nbc5 Nc5 14.Nc5 Qc5–/+) 13.Nbc5+– Qg2 14.Bf3 Qg6 15.Na4 (15.d4!? Ne7+–) 15...Ngf6 (15...Ne5!? 16.Nec5 Bf5+/–) 16.Nd6 (16.Nd6 Ke7 17.Nc8 (17.Bb7 Bb7 18.Nb7 Qg2–/+) 17...Rac8 18.Qb3+–) 1–0. GuestSKYR – GuestZTHF, freechess.org, 2017.

4.Nf3 Ngf6

5.a3= Be7 6.Be2 0–0 7.0–0 a5 8.b5=.

5.c4 Be7 6.Be2 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 0–0 6.Be2 Nbd7).

5.c4 g6 6.Be2 Bg7 7.d3 0–0 (-->1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0–0 5.e3 d6 6.Be2 e5 7.d3 Nbd7).

5.Be2 Be7 6.0–0 0–0 7.b5 b6 8.c4= Nc5 9.Nc3 Bb7 10.Ne1 d5 11.cd5 Nd5 12.Bf3 Bf6 13.Bd5 Bd5 14.Nd5 Qd5 15.a3 Nb3 16.Bc3? Na1–+ 17.Ba1 Rfd8 18.Bc3 Qb5 19.Qc2 Rd7 20.Nf3 Rad8 21.Rd1 Qd3 22.Qc1 c5 23.Be5 Rd5 24.Bf6–/+ gf6 25.g3?? b5 26.Ne1 Qe2 27.d3 Rf5 28.f4? Rh5–+ 29.Rd2 Qe3 30.Kf1 Rh2! (30...Rh2 31.Rh2 Qc1–+) 0–1. valpa – mrchess, playchess.de, 2003.

5.Be2 Be7 6.0–0 0–0 7.d3 Nb6 8.c4 Re8 9.Qc2 h6 10.a4 Be6 11.a5 Nbd7 12.Nbd2 g5 13.h3 g4 14.hg4 Ng4 15.d4 f5 16.d5 Bf7 17.Qf5 Ndf6 18.Nh4 h5 19.f3 Nh6 20.Qg5 Kh7 21.Bd3 (21...Kh8 22.Qh6 Kg8 23.Ng6 Bd5 24.cd5+–) 1–0. marekt – Sgt._Pepper, ChessWorld.net, 2003.

4.Nf3 g6

5.Bb5 a5 6.a3 f6 7.0–0 d5 8.c3=.

5.Nc3 Ngf6 6.e4 Be7 7.d4 a5 8.b5+=.

5.c4 c5 6.b5 (6.bc5 Nc5 7.d4 ed4+= (7...Qb6 8.Qc2+=) 8.Qd4+=) 6...Bg7= 7.d4 Qe7 (7...a6 8.de5=) 8.Be2 b6 (8...Ngf6 9.0–0=) 9.0–0 Bb7 (9...Ngf6 10.Nc3+=) 10.Re1 (10.d5 Ngf6+=) 10...Rc8 (better is 10...Ngf6=) 11.Nbd2?? (11.d5 Ngf6+=) 11...a5?? (better is 11...e4–/+) 12.ba6!+/– Ba6 13.Qa4 (13.de5 de5 14.Ne4 Rd8+=) 13...Bb7 14.de5 (14.Qb5 f5 15.d5 Ngf6+=) 14...de5 15.Bd3 (15.Red1 Bc6 16.Qa7 g5+=) 15...f5 (15...Ra8 16.Qb5=) 16.e4 Qd6? (16...Ra8 17.Qb5 Ra5 18.Qb3+/–) 17.Ne5! Bc6 (17...Be5 18.Be5) 18.Nc6 Bb2 19.ef5 Kf8 20.Rab1 Bc3 (better is 20...Bf6 21.Na7 Re8 22.Re8 Ke8+–) 21.Ne4 Qd3 (21...Qc6 22.Nc3 gf5 23.Bf5 Ngf6+–) 22.Nc3 (better is 22.Rbd1 Be1 23.Rd3+–) 22...Qc3 23.Qa6 Rc7? (better is 23...Rc6 24.Qa8 Kg7 25.Qc6 Ngf6 26.Re7 Kh6 27.Rd7 Nd7 28.Qd7 Ra8+–) 24.Qa8 Kg7 25.Qd8 Qd3 (25...Rb7 26.Qc8 Ngf6 27.Qb7 Kh6+–) 26.Qc7 Qf5 27.Rbd1 (27.Ne5 Ngf6 28.Nd7 Nd7+–) 27...Ngf6 28.h3 (better is 28.Ne5 Rf8 29.Nd7 Rf7+–) 28...Kh6 29.Ne7 (better is 29.Re7!? Rf8+–) 29...Qc2 30.Rd7 Nd7 31.Qd7 Rf8 32.Rf1 Qc4 33.Qd2 Kg7 (33...Qf4 34.Qf4 Rf4 35.Nd5+–) 34.Qb2 Qd4 35.Qd4 (35.Qb6 Rf7 36.Nc6 Qd6+–) 35...cd4 36.Nc6 (36.Rd1 Ra8 37.Rd2 Kh6+–) 36...d3 (36...Ra8 37.Nd4 Ra2 38.Rb1+–) 37.Rd1 Ra8 38.Nb4 (38.Rd2 Kf6+–) 38...Ra4 39.Rd3 (better is 39.Nd3 Ra2 40.Rb1+–) 39...Rb4+/– 40.f3 (40.Rb3 Ra4+/–) 40...Rb2 41.Rb3 Ra2 42.Rb6 h5 43.Kf1 h4 44.Rb4 g5 45.Rg4 Kf6 46.g3 (46.Re4 Rd2+=) 46...Ra1= 47.Ke2 Ra2 48.Kd1 Ra1 ½–½. Nebe,Lutz (1690) – Schmidt,Lutz, Koblenz Stadtmeisterschaft, 2001.

5.c4 Ngf6 6.Be2= (6.d4 e4 7.Nfd2 d5 8.a3+=) 6...e4 7.Ng5 Ne5 8.Nc3+=.

5.c4 Bg7 6.Be2 (6.d4 ed4 7.Nd4 Ne5=) 6...Ne7 (6...a5 7.b5=) 7.d4+= 0–0 8.0–0 Nf5 (8...a5 9.b5=) 9.Qc2 (9.Bd3 a5 10.a3 Re8+=) 9...Nh4 (9...a5 10.a3=) 10.Nbd2+= Re8 11.Rfd1 (11.a3 ed4 12.Bd4 Ne5+=) 11...a5 12.a3 ab4 (12...Nf3 13.Nf3 Qe7 14.c5+=) 13.ab4 Ra1 14.Ba1 (14.Ra1 Nf3 15.Bf3 Qh4+=) 14...ed4 (14...Nf3 15.Nf3 Qe7 16.de5 Ne5 17.Qe4+=) 15.Nh4 (15.Bd4 Ne5+=) 15...d3 16.Bd3 (16.Qd3 Qh4) 16...Ba1 (16...Qh4!? 17.Nf3 Qg4+=) 17.Ng6!+– hg6 (17...fg6 18.Ra1) 18.Ra1 Ne5 19.Be2 (19.Be4 c6+–) 19...Bf5 20.Qc3 (20.Qa4 b6+–) 20...Qf6+/– 21.Rc1 (21.Ra3 Kg7+/–) 21...Ra8 (21...Kg7 22.c5+/–) 22.h3 (22.e4 Bg4 23.f3 Be6+/–) 22...Ra2 23.Kf1 Kg7 24.Ke1 (24.e4 Nc6 25.ef5 Qc3 26.Rc3 Rd2 27.fg6 Rb2+/–) 24...g5 (24...Nc6 25.b5 Qc3 26.Rc3+/–) 25.f4 (25.c5 dc5 26.Qc5 c6+/–) 25...gf4 26.ef4 White fights for the Initiative. 26...Nc6 (26...Ng6 27.g4 Bd7 28.Qf6 Kf6 29.f5+/–) 27.g4 Qc3 28.Rc3 Bc2 29.b5 Nd4 30.Bd3 c5 (30...c6 31.bc6 bc6 32.Kf2+/–) 31.bc6 (31.Bc2 Nc2 32.Ke2 Nd4 33.Ke3 Ra8+–) 31...bc6+/– 32.Bc2 (32.Kf2 d5 33.cd5 cd5+/–) 32...Nc2 33.Ke2 Nd4 (33...d5 34.cd5 cd5 35.Rd3+/–) 34.Ke3 c5 (34...Nc2 35.Ke4+/–) 35.Nf3 (35.f5 Nc2 36.Ke4 Nb4+/–) 35...Nc2 (35...Ne2 36.Rd3 Nc1 37.Rd2 Ra3 38.Ke4+/–) 36.Ke4+– Nb4 37.f5 (37.Nh4!? Re2 38.Kf3+–) 37...Re2+/– 38.Kf4 d5 39.Rc1?? (better is 39.h4+/–). Van Riemsdijk,Dirk D – Gadia,Olicio, BRA–ch, 1984.

5.d4 Bg7 6.de5 de5 7.Bc4 Qe7 8.a3 Ngf6 9.0–0 0–0 10.Nc3 Nb6 11.Bb3 Bg4 12.h3 Rad8 ½–½. Mamuzic,Mirko (2265) – Borus,Andras (2120), HUN–chT2 Toth, 2008.

5.Be2 Ngf6= 6.0–0 e4 7.Nd4 d5 8.a3+=.

5.Be2 Bg7 6.0–0 Ne7 7.e4 d5 8.d3 0–0 9.Nbd2 c6 10.a3 h6 11.d4 de4 12.Ne4 f5 13.Nc3 (better is 13.Bc4!? Kh8 14.Nd6+=) 13...e4= 14.Ne1 Nb6 15.Nb1 Na4 16.Bc4? (better is 16.c3!? Nb2 17.Qb3 Nd5 18.Qb2+=) 16...Kh8 17.Bc1?? (better is 17.Ra2 b5 18.Bb3 Nb2 19.Rb2 Qd4 20.Qd4 Bd4 21.c3–+) 17...f4 (better is 17...Bd4 18.Qe2 Ba1 19.Bh6 Bg7 20.Bg7 Kg7–+) 18.c3+= Nb6 19.Bb3 a5 20.Bb2 Nf5 21.Qe2 e3 22.Nd3 Qg5 23.Nc5?? (better is 23.fe3 fe3 24.Rf3=) 23...Nd4!–+ 24.cd4 f3 (24...f3 25.Qf3 Rf3–+) 0–1. Tarasov,Ilia – Serdjukov,Sergey (2075), Borisoglebsk RUS, City Ch, 2012.

4.g3 Ngf6=+

5.c4 c6 6.Bg2 Qb6 7.Qb3 a5 8.a3 Nc5! 9.Qc2 (9.bc5 Qb3 Pinning (9...Qb3 Deflection)) 9...ab4 10.d4 b3 11.dc5 bc2 12.cb6 cb1Q 13.Rb1 Bf5 14.Ra1 Nd7 15.Nf3 Nb6 16.Nd2 Na4 17.Bc1 Be7 18.0–0 0–0 19.Be4 Be4 20.Ne4 f5 21.Nd2 Ra7 22.Re1 e4 23.Nb3 Bf6 24.Ra2 Rfa8 25.Rc2 g6 26.h3 Be5 27.Kg2 Kf7 28.g4 Rd8 29.f3 ef3 30.Kf3 fg4 31.hg4 Raa8 32.e4 Rd7 33.g5 Rf8 34.Kg4 Ke6 35.Be3 Rdf7 36.c5 Rf3 (36...Rf3 37.Nd2 Rg3 38.Kh4 Nc5–+) 0–1. Lammi,J (2175) – Salo,H (2255), TCh–FIN, Finland FIN, 2008.

5.Bg2 c6 6.Ne2 d5 7.a3 Bd6 8.0–0 b6 9.d4 e4 10.Qc1 h5 11.Nd2 g5 12.c4= h4 13.c5 bc5 14.bc5 Bc7–/+ 15.a4 hg3 16.fg3? Ba6 17.Rf2 Ng4 18.Rf5 Ne3 19.Rf2 Ng4 20.Qf1 Nf2 21.Qf2 Be2 22.Qe2 f5 23.Qa6 Qf6 24.Rf1 Nb8 25.Qb7 Qh6=+ 26.h3? g4–/+ 27.Qc7 gh3 28.Qe5= Kd8 29.Bh3?? Qh3–+ 30.Qf6 Kc7 31.Qe7 Kc8 32.Qe6 Kb7 33.Kf2 Qh2 34.Ke1 Qg3 35.Kd1 Rh2 36.Qd7 Ka6 37.Qc8 Ka5 38.Qd8 Ka4 39.Qc8 Rd2! 40.Kd2 Qd3 41.Ke1 Qb1 42.Kf2 Qb2 43.Kg3 a5 44.Qf5 Nd7! 45.Qg4 Rb8 46.Qd7 Qb3 47.Kh4 Rh8 48.Kg4 Qh3 (48...Qh3 49.Kg5 Rh5 50.Kg6 Rh6 51.Kg7 Rh7 52.Kg6 Qd7 53.Kg5 Qg7 54.Kf4 Rh4 55.Ke3 Qg3 56.Ke2 Rh2 57.Kd1 Qd3 58.Ke1 Qe2) 0–1. makaveli1982 – hiaohi01 (1635), internet, 2007.

3.e3 e4

4.a4 d5!?+=.

4.a4 f6 5.Qh5+= g6 6.Qd5 Qe7 7.Nc3 c6 (7...Nc6 8.Qc4+/–) 8.Qe4 f5?? (better is 8...Be6+/–) 9.Qe7+– Ne7 (9...Ke7 10.Nd5!! cd5 11.Bh8+–) 10.Nb5 Rg8 (10...cb5 11.Bb5 Nbc6 12.Bh8 a6 13.Bc6 bc6+–) 11.Nc7 (11.Nc7 Kd7 12.Na8+–) 1–0. Wall,Bill – Anything, internet, 2006.

4.Bb5 c6+= 5.Ba4 (5.Be2 d5 6.a3 Qg5+=) 5...d5 6.a3 (6.b5 Qg5 7.g3 a6 8.bc6 Nc6+=) 6...b5 (6...Qg5 7.g3+=) 7.Bb3 h6 (7...a5 8.ba5 Qg5 9.g3+=) 8.d3 (better is 8.Ne2=) 8...Be6 (better is 8...Qg5!? 9.de4 de4+=) 9.de4+/– de4 (9...a5 10.ed5 cd5 11.ba5+/–) 10.Qd8 Kd8 11.Be6 fe6 12.Nd2 Nd7 (12...a5 13.0–0–0+/–) 13.Ne4 Nb6 (13...a5 14.ba5 Ngf6 15.Nf6 gf6 16.Bc3+/–) 14.Nf3 (14.0–0–0 Ke7+–) 14...Na4 (14...Nc4 15.Ne5 Ne5 16.Be5+–) 15.Be5 (15.Rd1 Ke8 16.Be5 Rd8+–) 15...Ne7 16.Nd6 Kd7 (16...Rg8 17.Rd1 Nd5 18.e4+–) 17.Nf7 Rg8 (17...Rh7 18.Rd1 Nd5 19.e4+–) 18.Rd1 Ke8 (18...Nd5 19.e4+–) 19.Nd6 Kd7 20.Nb5 (20.Nb5 Nd5 21.Nc7+–) 1–0. Wall,Bill – Verity, internet, 2004.

4.Bb5 Bd7 5.Nc3 Bb5 6.Nb5 d5 =.

4.Nc3 Nf6 5.Bb5 c6=+ 6.Be2 d5 7.d3 Bb4–+ 8.d4 0–0 9.a3 Ba5 10.Qd2 Bg4 11.h3 Bh5 12.g4 Bg6 13.h4 h5 14.g5 Ng4 15.Bg4 hg4 16.Qe2 Bh5 17.0–0–0 g6 18.Qf1 Qb6 19.Nge2 Qa6–+ 20.Kb1 g3! 21.fg3 Bc3 22.Bc3?? Be2 23.Qf6 Bd1 24.Rd1 Qa3 25.h5 Nd7 26.Qf4 Qc3 27.h6 Kh7 28.Qf2 a5 29.Qe2 Ra6 30.Rf1 Rb6 31.Kc1 Qa1 32.Kd2 Rb1 33.Rd1 a4 34.Ke1 Qc3 35.Kf2 Rd1 36.Qd1 a3 37.Kg2 a2 38.Kh3 a1Q 39.Qe2 Qh1 (39...Qh1 40.Qh2 Qce1 41.c3 Qef1 42.Kh4 Qh2 43.Kg4 Qf3#) 0–1. Bernard – zak33, playchess.de, 2001.

4.c4 a6 5.d3 f5 (5...ed3 6.a3= Nc6 7.Nf3 Bg4 8.h3 Bf3 9.Qf3 Qg5; 5...Nf6 6.de4 (6.Nc3 Bg4 7.Be2 Be2 8.Nge2 ed3 9.Qd3 Nbd7) 6...a5 7.a3 Ne4 8.Bd3 Nf6 9.Nf3 ab4; 5...Nc6 6.b5 Ne5 7.de4 Be6 8.Nd2 ab5 9.cb5 h6) 6.de4 fe4 7.Nd2 (7.Qh5 g6 8.Qd1 Nf6 9.Nc3 Bf5) 7...Nf6 (7...Qe7 8.Qh5 Kd8 9.Qd5+= Nc6) 8.a3 (8.Bf6 Qf6 9.Ne4 Qe5+=) 8...c6 (8...Qe7 9.Ne2 a5 10.Bf6 gf6 11.Nf4+=) 9.Ne2 (9.Bf6 Qf6 10.Ne4 Qg6+/–) 9...d5 (9...Nbd7 10.Nc3 Qe7 11.Be2+=) 10.Ng3 (10.cd5 cd5 11.Nf4 Be7+/–) 10...Bd6 (better is 10...Be7=) 11.Nf5?? (11.Bf6 gf6 12.cd5 Bg3 13.Qh5 Ke7 14.hg3 cd5+–) 11...Qd7 (better is 11...Bf5 12.c5 Bc7–+) 12.Bf6+/– gf6 (12...Qf5!? 13.Bg7 Rg8+/–) 13.Qh5+– Kd8 14.Be2?? (14.Nd6 Qd6 15.Rd1 Qe6+–) 14...Rg8 (better is 14...Qf5 15.Qf5 Bf5–+) 15.Bg4?? (better is 15.Nd6!? Qd6 16.Qh7+–) 15...Be7 (better is 15...Rg5!? 16.Qh4 Rg4 (16...Rf5?! 17.Ne4 de4 18.Rd1=) 17.Qg4 Qf5 18.Qg8 Ke7–/+) 16.Ne4 (16.Bh3 Rg5 17.Ng3 Rh5 18.Bd7 Re5 19.Bc8 Kc8+=) 16...Rg4+= (16...de4 17.Rd1 Rg5 18.Rd7 Nd7 19.Qh7 Bb4 20.ab4 Rg4 21.Nh6 Rg2 22.Kf1+– (worse is 22.Qe4 Rg7+–)) 17.Neg3?? (better is 17.Qg4 Qf5 18.Qg8 Kc7 19.Qg3 Kb6 20.Nd2+=) 17...Rc4 (better is 17...Rg5 18.Qh4 Rf5 19.Nf5 Qf5 20.cd5 cd5–+ (worse is 20...Qd5 21.Rd1+/–)) 18.Qh7?? (18.0–0 a5 19.Qh7 ab4 20.ab4 Ra1 21.Ra1 Bb4 22.Qh8 Kc7 23.Ng7–+) 18...Bb4! 19.ab4 Qh7 (19...Qh7 20.Nd4 Rb4–+) 0–1. Trkn – Anthony, itsyourturn.com, 2000.

4.c4 c6 5.Nc3 Nf6 6.Qc2 d5 7.cd5 cd5 8.Bb5 Bd7 9.a4 (9.a3 a5+=) 9...a6 (9...Bb5 10.ab5 Bb4 11.Nge2–/+) 10.Be2 (10.Bd7 Qd7 11.Na2 Qg4+=) 10...Bc6 (10...Bb4!? 11.Nd5 Nd5 12.Qe4 Be6 13.Bg7 Rg8 14.Qh7 Bd2 15.Kf1 Ne7–/+) 11.b5= ab5 12.ab5 Ra1 13.Ba1 Bd7 14.f3 ef3 (14...Bf5!? 15.Qd1 Qd7+=) 15.Nf3+= Be6 16.Nd4 b6 17.Ne6 (17.0–0 Bd6+/–) 17...fe6= 18.0–0 Bc5 (18...Bd6 19.e4+=) 19.Na4+= Qd6? (19...Nbd7!?+=) 20.Nc5 (better is 20.Bf6 gf6 21.d4+– (21.Rf6?! Qe5 22.Rf2 d4 23.Nc5 bc5+–; 21.Nc5?! bc5 22.Rf6 Nd7 23.Bh5 Kd8+–)) 20...Qc5+/– 21.Qc5 bc5 22.Bf6 gf6 23.Rf6 Ke7 24.Rf1 Nd7 25.Ra1 Rb8 26.Ra5 Nf6 (26...c4 27.e4+=) 27.d3+/– Nd7 28.Bf3 (28.Kf2 Kd6+/–) 28...Kd6 29.Bg4 Ne5 30.Ra6 Kc7 31.Re6?? (better is 31.Be6 Rb5 32.Bd5+/–) 31...Ng4–+ 32.h3? (better is 32.Rc6 Kb7 33.Rc5 Ne3 34.Kf2–+) 32...Kd7 33.Ra6 Ne3 34.Ra7 Kd6 35.Rh7 (35.Kf2 Nc2–+) 35...Rb5 36.Kf2 Nf5 37.Kf3 (37.g4 Rb2 38.Ke1 Ne3–+) 37...Rb4 (37...Nd4 38.Ke3 Rb3 39.Rh6 Ne6 40.Kd2 Rb2 41.Ke3 d4 42.Kf3–+) 38.Ra7 (38.g4 Nd4 39.Ke3 Ne6–+) 38...Nd4 39.Ke3 Nf5 (39...Rb3!? 40.Kd2–+) 40.Kf3 Ne7 (40...Rb3!? 41.Kf4 Nd4 42.Ra6 Nc6 43.h4–+) 41.Ra6 Nc6 42.Ke3 (42.g3 Kd7 43.Ra2 Rb3–+) 42...Kd7 0–1. GuestNJPY – GuestYGFV, freechess.org, 2017.

4.d3 Nc6 5.b5 Nb4? (5...Ne5 6.de4 Bg4 7.Be2+/–) 6.a3 (better is 6.de4 Nf6 7.a3+–) 6...Nd5+/– 7.de4 Nb6 8.Nd2 Nf6 9.Ngf3 Na4 10.Bd4 b6 11.c4 Nb2?? (better is 11...Nc5+/–) 12.Bb2+– c5 13.e5 de5 14.Ne5 Bd6 (14...Bb7 15.Ndf3 Bd6 16.Bd3+–) 15.Nef3 (15.Qf3 Bd7+–) 15...Ng4 (15...Bb7 16.Bd3+–) 16.Be2 (16.Bg7 Rg8 17.Ne4 Be7 18.Qd8 Kd8 19.Rd1 Ke8+–) 16...a5 (16...0–0 17.h3 Nh6 18.Ne4+–) 17.0–0 (17.Bg7 Rg8 18.Ne4 Be7 19.Qd8 Kd8 20.Rd1 Kc7+–) 17...Be6 18.g3 h5 19.Ng5 Qg5 20.Ne4 Qe7 21.Nd6 Kf8 22.Ne4 h4 23.Bg4 Bc4 24.Re1 Qe4 25.Bf3 Qf5 26.Ba8 hg3 27.Qd8 1–0. valpa – LADY, playchess.de, 2003.

4.d3 f5 5.de4 fe4 6.Nd2 d5? (better is 6...Nf6 7.Bf6 Qf6 8.Ne4 Qe5+=) 7.Qh5+– Ke7 8.0–0–0 g6?? (8...Nd7 9.Qd5 Ngf6+–) 9.Qe5 Be6 10.Qh8 Nf6 (10...Ke8 11.Ne4! Qh4+–) 11.Bf6 Kd7 12.Bd8 Kd8 13.Qf8 Kd7 14.Ne4 b6 15.Bb5 c6 16.Qd6 Kc8 17.Qe6 Nd7 (17...Kb7 18.Qe7 Nd7 19.Qd7 Kb8 20.Qd8 Kb7 21.Nd6) 18.Qc6 Kb8 19.Nd6 Ne5 (19...Nc5 20.Qc8) 20.Qb7 1–0. mrkt – Doctor Rich C, internet, 2005.

4.d4 d5 5.a3 Nf6 6.g3 (6.c4!?+=) 6...Be7 7.Bg2 0–0 8.Ne2 Bg4 9.0–0 Qd7 10.Re1 Bh3 11.Nf4 Bg2 12.Ng2 Bd6 (12...a5 13.ba5 Nc6 14.Nd2–/+) 13.Nd2 Qh3 14.c4 (14.f3 Nbd7+=) 14...c6 (14...dc4!? 15.f3 ef3 16.Nf3 Re8–/+) 15.c5 Bc7 16.f4 (16.f3 ef3 17.Nf3 Nbd7–/+) 16...Nbd7 17.a4 (17.Re2–/+) 17...b6 (17...Ng4 18.Nf1–+) 18.a5? (18.b5 bc5 19.bc6 Nb8 20.dc5 Ng4+=) 18...Rfe8 (better is 18...bc5!? 19.dc5 Ng4–+) 19.ab6–/+ ab6 20.Ra8 Ra8 21.Nb3?? (better is 21.b5 cb5 22.c6–/+) 21...Ng4–+ 22.cb6 (22.Qd2 Qh2 23.Kf1–+) 22...Qh2 23.Kf1 Qh1 24.Ke2 Qg2 0–1. Gorniak,Weronika – Dixa,Joanna, DW, 2012.

4.c4 Nf6

5.Nc3 Nc6 6.d3=.

5.Nc3 Be7 6.Qc2 Bf5 7.d3 (7.f3 Nc6=) 7...ed3 8.Bd3 Bd3 9.Qd3 0–0 10.Nf3 Nc6 11.a3 Ne5 12.Ne5 de5 13.Qc2 (13.Qf5!?+=) 13...a5= 14.Rd1 Qc8 15.0–0 Qg4 (15...ab4!? 16.ab4 Bb4+=) 16.Nd5 (16.Nb5 ab4 17.ab4 Ne8 18.Be5 c6+=) 16...Nd5= 17.cd5 ab4 (17...Bd6 18.b5=) 18.h3 (18.Qc7 ba3 19.Be5 Rfe8+=) 18...Qg5 19.ab4 (worse is 19.Qc7 ba3 20.Ba1 b5–/+) 19...Bb4 (19...Bd6!?=) 20.Qc7+= Rfd8 (20...e4 21.Qc4 Bd6 22.Qe4+/–) 21.Qe5+/– (21.Be5?! Ba5 22.Bf4 Qd5 23.Rd5 Bc7 24.Rd8 Bd8+=) 21...Qe5 22.Be5 f5 23.Bc7 (23.g4 g6+/–) 23...Rd7 24.d6 (24.Rb1 Be7 25.d6 Bd6 26.Bd6 Rd6 27.Rb7 Rad8+/–) 24...Kf7 25.Rd5 Ke6 26.Rfd1 (better is 26.Rb5!? Bd6 27.Bd6 Rd6 28.Rb7+/–) 26...Ra1= 27.Ra1 Kd5 28.Rd1 Kc6 29.Rc1 Kd5 ½–½. GuestTCFT – RoyJuarez, freechess.org, 2017.

5.d4 d5 6.a3 Bd6= (6...c6 7.Nc3 Bd6 8.Qc2 a6+=) 7.Nc3 c6 8.Qc2 a6+=.

5.d4 d5 6.b5 Bb4 (6...Be6 7.Ne2 (7.cd5 Nd5 8.a3+= a6+=) 7...dc4 8.Nf4 Bg4+=) 7.Nc3 Bg4 (7...c6 8.Qb3 Ba5 9.Rc1=; 7...Be6 8.Qa4 Bc3=) 8.Qb3= (8.Qa4 Bc3=) 8...Ba5 (8...Bc3 9.Bc3 Be6 10.Rc1=) 9.h3 (9.cd5 Nd5 10.Bc4 Nc3 11.Bc3 Bc3 12.Qc3 0–0=) 9...Bc8 (9...Be6 10.Nge2+=) 10.c5 (10.cd5 Nd5 11.Bc4 Qg5=) 10...c6 11.a4 0–0 12.Nge2 a6 (12...Bc7 13.Nf4+=) 13.b6 Nbd7 14.0–0–0 (14.Bc1=) 14...Bb6 (better is 14...Ne8+=) 15.cb6+/– Nb6 16.Ba3 Nbd7? (better is 16...Re8+/–) 17.Bf8+– Qf8 (17...Nf8 18.Kd2+–) 18.a5 (18.Kd2 Rb8+–) 18...Rb8 19.Na4 b5 20.ab6 Qd8 (20...Nb6 21.Nb6 Qe8 22.Kd2+–) 21.Nec3 Nb6 22.Nb6 Rb6 23.Qa3 a5 (23...Nd7 24.Kd2+–) 24.Kd2 (24.Qa5 Rb1!? 25.Kc2 Rb2 26.Kb2 Qa5+=) 24...Rb8 25.Be2 Nd7 (25...Ra8 26.Ra1+–) 26.Rb1 Ra8 27.Qd6 Qf6 28.Qf6 Nf6 29.Rb6 Bd7 30.Rhb1 g6 (30...g5 31.Rb8 Rb8 32.Rb8 Kg7 33.Ra8+–) 31.Rb8 Rb8 32.Rb8 Kg7 33.Ra8 a4 (33...h5 34.Ra5 Kh6 35.Na4+–) 34.Ra4 (34.Na4 g5+–) 34...Kh6 (34...Kf8 35.Ra7+–) 35.Na2 Ng8 (35...Kg5 36.Ra6+–) 36.Nb4 f5 (36...Kg5 37.Ra6+–) 37.Ra6 Nf6 38.Nc6 Bc8 (38...Bc6 39.Rc6 Kg7 40.Ba6+–) 39.Ra5 1–0. Kucharkowski,Jens – Sander,Detlef, corr DDR–ch, 1985.

5.d4 d5 6.c5 Nc6 7.b5= Na5 (7...Ne7 8.Nc3=) 8.Bc3 Nc4 9.Bc4 (9.Qa4 Be6=) 9...dc4 10.Nd2 Nd5 (10...Be6 11.Ne2+=) 11.Qc2 (worse is 11.Ne4 f5 12.Rc1 fe4 13.Qh5 Ke7 14.Qe5 Be6 15.Qe4 a6–/+) 11...Qd7 (better is 11...f5!?=) 12.Qe4+/– Be7 13.Ne2 c6 (13...Nf6!? 14.Qe5 Qb5 15.Qc7 Bf5+/–) 14.bc6 (14.Nc4 0–0 15.Ne5 Qe8+–) 14...bc6 (14...Qc6 15.Nc4 Be6 16.Ne5+–) 15.Nc4 Ba6 16.Ne5 Qe6 (16...Qc8 17.Qc2+–) 17.Nf4 Nc3? (better is 17...Nf4 18.ef4 Rc8+–) 18.Ne6 Ne4 19.Nc7 Kf8 20.Na8 Nc3 (20...Bh4 21.g3 Bf6 22.Nc7+– (worse is 22.Nc6 Bb7 23.Rb1 Bc6 24.Rb8 Be8+–)) 21.Nc7 (better is 21.Rc1 f6 22.Nc6 Na2 23.Rb1+–) 21...Be2 (21...Bb7 22.Rc1 Bd8 23.Rc3 Bc7+–) 22.Nc6 Bb5 (22...Bc4 23.Rc1 Nb5 24.Rc4 Nc7 25.Rb4+–) 23.Nb5 Nb5 24.Rb1 (24.Rb1 a6 25.a4+–) 1–0. Wall,Bill – Micro9, internet, 2003.

5.d4 d5 6.c5 Be7 7.Nc3 =+.

5.d4 Be7 6.Nc3 0–0 7.d5 a5 8.a3 Na6+=.

5.Bf6 Qf6 6.Nc3 a5 (6...Qh4= 7.d3 Na6 8.a3 ed3+=) 7.b5 Bf5 8.Nge2 Nd7+=.

4.d3 d5

5.Nd2 =.

5.de4 de4 6.Qd8+/– Kd8 7.Nd2 f5 8.a3 Nf6 9.Nh3 Be6 10.Nf4 Bf7 11.Nb3 Nbd7 12.Nd4 g6 13.Nde6 Be6 14.Ne6 Kc8 15.Bb5 c6 16.Bc4 b5 17.Bb3 Be7 18.c4 a6 19.Rc1 h5? 20.cb5 ab5 21.Rc6 Kb8 22.Ke2 Rc8 23.Rc8 Kc8 24.Rc1 Kb8 25.Nc7 Ra7 26.Nb5 Rb7 27.Nd4 Rc7 28.Nc6 (28.Nc6 Rc6 29.Rc6+–) 1–0. pierre_d – Arahno, chessmaniac.com, 2006.

4.d3 Nf6

5.de4 Ne4 6.Nd2 Nd2 7.Qd2 Be6 8.Nf3 Nd7 (8...Nc6 9.Bd3=) 9.Bd3+= c6 (9...a5 10.0–0+=) 10.0–0+/– Nf6 11.c4 Be7 12.Ng5 d5 13.Ne6 fe6 14.cd5 Qd5 15.Rfd1 0–0–0 (15...0–0 16.Bd4+=) 16.Qc2 (16.Qc3!?+/–) 16...Bb4+= 17.Bc4 (17.Rab1 Qc5 18.Qb3+/–) 17...Qh5 (17...Qf5 18.Qb3 Qa5+/–) 18.Be6+/– Kb8 19.Bb3 (19.Rab1 Rd1 20.Rd1 Re8 21.Bf6 gf6+/–) ½–½. Woschkat,Karl_Heinz – McDermott,Drew, IECG Cat–C, 1996.

5.de4 Ne4 6.Nd2 Nd2 7.Qd2 Be7 8.Bg7 Rg8 9.Bc3 b6 10.Qd3 Nc6 (10...Bf6 11.Ne2 Rg4 12.0–0–0+–) 11.Nf3 (11.Qh7 Rg4 12.Bb5 Bd7+–) 11...d5 (better is 11...Rg6+–) 12.b5 Nb4 13.Qh7 Nc2 (13...Rf8 14.Bg7 Qd6+–) 14.Qc2 Ba3 15.Qh7 Rg4 16.h3 Ra4 17.h4 Be6 (17...Bf8 18.h5 Ra3 19.Bb2+–) 18.Qh8 Kd7 19.Ne5 Kd6 20.Qh7 Qg8 21.Qc2 Re4 22.Rd1 Bc5 (22...Ke7+–) 23.Qe4 Bg4 24.Rd5 Ke6 (24...Ke7 25.Ng6) 25.Ng4 1–0. marekt – damien22, schemingmind.com, 2005.

3.e3 Be6

4.a3 f5 5.c4 Nf6 6.Nf3 Be7 7.d4 e4 8.d5 Bf7 9.Nd4 0–0 10.Nf5+/– Nbd7 11.Nd2 Bg6 12.Nd4 Ne5 13.Ne6+– Qd7 14.Nf8 Rf8 15.Be5 de5 16.Be2 a5 17.ba5 Ra8 18.Qb3 Ra5 19.Qb7 Ra3 20.0–0 Ra1 21.Ra1 h6 22.Qb8 Kh7 23.Ra8 Ne8 24.Bd1 Bd6 25.Ba4 Qf5 26.Be8 Be8 27.Qe8 Qg5 28.Ne4 Qg4 29.Nf6! gf6 30.Qh8 Kg6 31.Rg8 Kf5 32.Qh7 Qg6 33.Qg6# 1–0. Trkn – guest934, ICC, 2004.

4.a3 Nf6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be6).

4.a4 Nd7 5.Nf3 Be7 (5...Ngf6 6.Be2=) 6.c4 (6.d4 Ngf6+=) 6...h6 (6...Ngf6 7.Ng5+=) 7.Nc3 (7.d4 Ngf6=) 7...Ngf6 8.d4 ed4 (8...a5 9.b5=) 9.Nd4 c5 (9...a5 10.b5=) 10.Ne6 fe6 11.Nb5 (11.b5 Qa5=) 11...Qb6 (11...0–0 12.Nd6 cb4 13.Qd4=) 12.a5 Qc6 13.Be2 a6 (13...0–0 14.0–0=) 14.Bf3+= d5 15.Nc3 Ne4? (better is 15...cb4 16.cd5 Qc4+=) 16.cd5+– ed5 17.Nd5 Ndf6? (17...Bf6 18.Be4 Bb2 19.Rb1+–) 18.Be4 (better is 18.Bf6!? Bf6 19.Be4 Ba1 20.Qa1 Kf7+–) 18...Ne4 19.Bg7 Rg8 20.Qh5 (20.Ne7 Ke7 21.Be5 Rg2 22.bc5 Nf2 23.Qd6 Qd6 24.Bd6 Ke6+–) 20...Kd7 (20...Kd8 21.Rd1 Rg7 22.Qe5+–) 21.Nb6 Kc7 (21...Kd8 22.Qf7 Rg7 23.Rd1 Nd6 24.Qg7+– (24.Na8?? Rf7 25.0–0 cb4–+)) 22.bc5 Bc5 (22...Kb8 23.Qh6 Qh6 24.Bh6 Rg2 25.Bf4 Ka7 26.Na8 Ka8+–) 23.Qf7 Kd6 24.Nc4# 1–0. Wall,Bill – Guest6721, internet, 2003.

4.a4 f5 5.b5 (5.d4 d5+=) 5...Nd7 (5...Nf6 6.Nf3=) 6.d4 Ngf6 7.de5 (7.Nf3!?=) 7...de5+= 8.Nf3 Bd6 (8...Bb4 9.c3 Ba5 10.Be2+=) 9.Ba3 (9.Nbd2 Qe7+=) 9...Qe7 (9...Ba3 10.Ra3 Qe7 11.a5–/+) 10.Bd6 cd6 11.Na3 (11.Be2 0–0+=) 11...0–0–0 (11...d5 12.Ng5+=) 12.Bc4 (12.Be2 Ne4+=) 12...d5 13.Bb3 (13.Be2+=) 13...h6 (13...Qb4!? 14.Qd2 Qd2 15.Nd2 Rhe8+=) 14.0–0= g5 (14...Kb8 15.a5=) 15.c4 g4 (15...dc4 16.Bc4 Kb8 17.Qb3=) 16.Nh4+= Nf8 (better is 16...Nc5 17.b6 dc4 18.ba7 Kc7=) 17.g3?? (17.cd5 Kb8 18.b6 a5+–) 17...Ne4 (better is 17...d4–/+) 18.cd5+= Kb8 19.Qe2 (19.Qc2 Bc8+/–) 19...Bc8 (19...Bd5 20.Bd5 Nc3 21.Qc2 Nd5 22.Nf5+/–) 20.Nc2 (20.Rfc1 Qd6+/–) 20...Ng5 (20...Qc5 21.Rfc1+/–) 21.f3 (21.Rac1 Qd6+/–) 21...gf3 22.Nf3 Ng6 23.Nce1 (23.Rac1 h5+/–) 23...Rd6 (23...Qd6 24.Rc1+/–) 24.Ng5 (24.Rc1 Rhd8+/–) 24...hg5+= 25.Rf5?? (better is 25.Rc1+=) 25...Bf5–+ 26.e4 Bh3 27.Nd3 (27.Rc1 Rf6 28.Ng2 Qa3–+) 27...Rf6 28.Nf2 (28.Bc4–+) 28...Qc5 29.Ra2 (29.Qc2 Qe3 30.d6–+) 29...Rhf8 (29...Rf2 30.Qf2 Qc1 31.Bd1 Qd1 32.Qe1 Qe1) 30.Rc2 Qd4 (30...Rf2 31.Qf2 Rf2 32.Rf2 Qc1 33.Bd1 Qd1 34.Rf1 Qf1) 31.Rd2 Rf2 32.Rd4 (32.Qf2 Rf2 33.Rf2 Qa1 34.Bd1 Qd1 35.Rf1 Qf1) 32...Rf1 (32...Rf1 33.Qf1 Rf1; 32...ed4?! 33.Qf2 Rf2 34.Kf2–/+) 0–1. Ruhle,Ernst Albrecht (1685) – Kofler,Franz (1900), Seefeld op, 1993.

4.a4 g6 5.Nf3 Bg7 6.Nc3 Ne7 7.d4 0–0 8.d5 Bd7 9.Be2 h6 10.0–0 Kh7 11.Qd2 f5 12.a5 Be8 13.b5 Bf7 14.Bc4 Nd7 15.e4 f4 (15...a6 16.ba6 ba6 17.ef5 Nf5 18.Rfb1=) 16.a6 b6 (16...ba6 17.Ra6 Nc5 18.Raa1+=) 17.Bd3 Nc5 18.Rad1 Qd7 19.Be2 g5 20.h3 Bf6 21.Ne1 h5 22.Nd3 g4 23.hg4 hg4 24.f3 g3 25.Rfe1 (25.Nc5!? bc5 26.Bd3=) 25...Kg7 26.Nc5 bc5 27.Qd3 Rh8 28.Rd2?? (28.Qd2 Rh2 29.Bc4–+) 28...Qe8 (29.Qd4 ed4–+) 0–1. b4_player (2155) – maluco (1770), GameColony.com, 2003.

4.b5 a6 (4...Nf6 5.d4 e4 6.c4+=) 5.a4 (5.d4 ed4 6.Bd4 Nf6=) 5...ab5 6.ab5 Nd7 (6...Ra1 7.Ba1 Nf6 8.Nf3+=) 7.c4 (7.Ra8 Qa8 8.Nf3 Qa2=) 7...Ngf6 (7...Ra1 8.Ba1 d5 9.Nf3 dc4 10.Ne5 Ne5 11.Be5=) 8.Nf3 (8.Ra8 Qa8 9.d4 ed4 10.Bd4 d5=) 8...Be7 (8...Ra1 9.Ba1 Be7 10.d4+=) 9.Be2 (9.Ra8 Qa8 10.d4 e4=) 9...0–0 (9...Ra1 10.Ba1 0–0 11.0–0=) 10.0–0 (10.Ra8 Qa8 11.d4 Qa2=) 10...c6 (10...Ra1 11.Ba1 Nb6 12.d3+=) 11.Nc3 d5 (11...Ra1 12.Qa1 Bg4 13.h3=) 12.cd5 (12.Ra8 Qa8 13.d4=) 12...Nd5 (better is 12...cd5!? 13.Ra8 Qa8=) 13.Nd5 Bd5 14.Ra8 Qa8 15.Ne5 Ne5 (15...Qe8 16.Nf3+=) 16.Be5+/– b6 17.Qa1 (17.Qc2 f6 18.Ra1+/–) 17...c5 (17...f6 18.Bd4 c5 19.Qa8 Ra8 20.Bc3=) 18.f3 (18.Bg7!? Qa1 19.Ba1+–) 18...f6 19.Bc3 (19.Bf4 Qd8+/–) 19...Qb7 (19...Qc8 20.e4 Qe6 21.ed5 Qe2 22.Re1 Qb5 23.Re7+–) 20.Qb2 (20.Qa6 Rd8+=) 20...Ra8 21.Ra1 Ra1 22.Qa1 Qa8 (22...Qd7 23.e4 Qe6 24.Qa7+/–) 23.Qa8 Ba8 24.Bc4 Kf8 25.e4 Bd6 26.d4 Bf4 (26...Ke7 27.g3+–) 27.Kf2+– Bd6 28.g3 g5 (28...Ke7 29.Ke3+–) 29.Ke3 Ke7 30.dc5 (30.d5 Be5 31.Be5 fe5+–) 30...Bc5 31.Bd4 Kd6 32.Kd3 Bd4 33.Kd4 Bb7 34.f4 White plans e5 34...h6 (34...g4 35.Bd5 Bc8 36.e5 fe5 37.fe5 Ke7 38.Ke4+–) 35.e5 (35.Bd5 Bc8+–) 35...Ke7 36.Bd5 Bc8 37.h4 g4 (37...gf4 38.gf4 Bf5 39.Be4+–) 38.ef6 Kf6 39.Bc4 Bb7 40.Bd5 (40.h5 Bf3+–) 40...Bc8 41.Bc6 (41.h5 Bd7 42.Bc6 Bf5+–) 41...Be6 42.Be8 (42.Be4 h5+–) 42...Bb3 (42...Ke7 43.Bg6+/–) 43.h5 (43.Bd7 Bd1+–) 43...Ke7 (43...Be6 44.Bg6+–) 44.Bg6 Kf6 45.Be8 (45.Kc3 Be6+/–) 45...Be6 (45...Ke7 46.Kc3 Be6+/–) 46.Ke4 Bb3 47.Bd7 Bc4 (47...Bd1 48.Bc6+–) 48.Kd4 Be2 49.Kd5 Ke7 50.Kc6 Bf3 51.Kc7 Bd5 (51...Be2+–) 52.Bg4 (52.Bg4 Bh1 53.Kb6+–) 1–0. Schwichtenberg,Juergen – Meckelburg,Berthold, Hessen–ch Seniors, 2001.

4.b5 f6 5.d3 Bd7 6.a4 c6 7.c4 c5 8.Nc3 Be6 9.g3 Ne7 10.Bg2 Qc8 11.Ne4 d5?? (better is 11...Ng6+=) 12.Nd6+– Kd7 13.Nc8 Nc8 (13...Kc8 14.cd5 Nd5 15.Rc1+–) 14.cd5 (14.cd5 Bf7 15.f4 ef4 16.gf4+–) 1–0. Satka,Martin – Zelinski,Heinz, 7sen.LSEM Brandenburg, 1999.

4.b5 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.e3 Nf6 4.b5 Be6).

4.b5 g6 5.Nf3 Bg7 6.Be2 Ne7 (6...a6 7.0–0=) 7.d3 (7.0–0 0–0=) 7...Qd7 (7...a6 8.d4=) 8.a4 (8.d4 a6=) 8...0–0 (8...a6 9.c4=) 9.0–0 Rc8 (9...a6 10.c4=) 10.Qc1 (10.Ng5 c6=) 10...c5 (10...a6 11.c4=) 11.Nbd2 Qe8 (11...a6 12.c4=) 12.c4+= Nd7 (better is 12...Qd7!?+=) 13.Ne4+– Rc7 14.Nd6 Qd8 15.Ne4 (15.a5 Nf5 16.Ne4 h6+–) 15...h6 16.Nc3 Nf6 (better is 16...a6!?+/–) 17.Ne5+– Qd6 (17...Bf5 18.e4 Bc8 19.Qe3+–) 18.Nf3 (better is 18.Rd1+–) 18...Nf5? (18...Rd7 19.Rd1+–) 19.Rd1 (19.e4 Nd4 20.e5 Nf3 21.Bf3 Qe5+–) 19...Ng4 (better is 19...Re8+–) 20.Ne4 Qe7 21.h3 Nf6 22.Nc3 (22.Bf6!? Bf6 23.Nf6 Qf6+–) 22...Rd8 (22...a5 23.Ne5+–) 23.Qc2 (23.a5 a6+–) 23...Nd7 (23...a5 24.ba6 ba6 25.Rab1+–) 24.Ne4 (24.a5 Nf6+–) 24...Nf6 (24...Bb2 25.Qb2 Bc4 26.Nc5 Nc5 27.dc4 Rd1 28.Bd1 Ne4+–) 25.Ned2 Bc8 26.Nb3 Re8 27.e4 (better is 27.Be5 Rd7 28.d4 cd4 29.ed4+–) 27...Bd7? (better is 27...Nd7+–) 28.Re1 Nd4 29.Nbd4 cd4 30.Bd4 Nh5 (30...a6 31.e5 Nd5 32.Qd2+–) 31.Qd2 Kh7 (31...Bd4 32.Nd4 Qf6 33.Nf3+–) 32.Rac1 (32.e5 Bh8+–) 32...b6 (32...Bd4 33.Nd4 Ng7 34.a5+–) 33.Bg7 Kg7 (33...Ng7 34.e5+–) 34.e5 Kh7 35.d4 Rec8 (35...Qa3 36.a5+–) 36.d5 Rd8 (36...Rc5+–) 37.d6 (37.d6 Be8 38.de7 Rd2 39.Nd2+–) 1–0. Acevedo,Daiana – Sanseverino,Victoria, ARG–ch sf U16 Girls, 2003.

4.d3 d5 5.Be5 Nc6 6.Bc3 Nb4 7.a3 Nc6 8.Nf3 Bc5?? (Better is 8...Nf6=) 9.Bg7+– Bg4 10.Bh8 Bf3 (11.Qf3 d4+–; 10...d4 11.h3 Be6 12.ed4 Nd4 13.Nbd2+–) 0–1. maxum – toudd, Live Game Caissa's Web, 2004.

4.d3 Nf6 5.c3 Be7 6.Na3 (6.Nf3 0–0+= (6...a5 7.b5 0–0 8.Be2 a4 9.0–0 c6=) 7.Be2 a5 8.b5 Nbd7 9.c4 Re8=) 6...0–0 (6...a5 7.b5 Nbd7 8.Nf3 d5 9.Be2 Bd6+=) 7.g3 (7.Nf3 a5+= 8.b5 Re8 9.Be2 Nbd7+=) 7...Nbd7 (7...a5 8.b5 d5 9.Bg2 Bg4–/+) 8.Bg2 c6 (8...d5 9.Nf3 a5–/+) 9.Nc2 (9.Nf3 d5–/+) 9...Qb6 (9...a5–/+) 10.Ne2 Rad8 (10...a5 11.a3–/+) 11.0–0 (11.f4 e4+=) 11...d5 12.Qc1 (12.f4 e4+=) 12...Qa6 13.Rd1 e4 14.Ne1 (14.Ncd4 Bg4 15.f3 ef3 16.Bf3 Ne5 17.Bg4 Nfg4–/+) 14...Bg4 15.Qc2 (15.f3 ef3 16.Bf3 Rfe8+=) 15...Ne5–/+ 16.Rd2? (better is 16.Bf1–/+) 16...Be2–+ 17.Re2 (17.de4 Bh5 18.ed5 cd5–+) 17...ed3 (17...Nd3?! 18.a4 Ne5 19.Rd2–+) 18.Nd3 Qd3 19.Qd3 Nd3 20.Rd1 Ne5 21.f4 (21.a3 Nc4–+) 21...Nc4 22.Bc1 Rfe8 23.h3 Bd6 24.Rd3 Bc7 25.Kf2 Bb6 26.Kf3 Ne4 27.g4 (27.a4 Re6 28.Bf1 a5–+) 27...g5 (27...Re6 28.Bf1–+) 28.a4 a6 (28...h6 29.a5 Bc7 30.Re1–+) 29.a5 Ba7 30.Bf1 Re6 31.Bg2 (31.Rh2 Rde8–+) 31...Rde8 (31...Rf6!? 32.Re1 Re8 33.f5 Ne5 34.Ke2 Nd3 35.Kd3–+) 32.Bf1 h6 33.Bg2 (33.Rc2 Nf6 34.Re2 Nd7–+) 33...Ned6 (better is 33...Rf6!? 34.Ra2–+) 34.f5 (34.Bf1–+) 34...Ne5 (34...Ne5 35.Kg3 Nd3 36.fe6 Nc1–+) 0–1. Chivaux,Serge – Gehr,Hans, 03 sen. Adelboden (SUI) op, 2005.

4.d4 c5 5.Bb5 Nd7 6.bc5 Qa5 7.Nc3 Qb4 8.Bd7 Bd7 9.Rb1 ed4 10.ed4 0–0–0 (10...dc5 11.Qe2 Ne7 12.Ba1=) 11.Ba1 (11.c6 bc6 12.Nge2 Nf6+=) 11...Re8+= 12.Nge2 Qc4 13.cd6 Bd6 14.0–0 Nf6 15.Ng3 (15.Re1 Re7+=) 15...h5 (15...Re7 16.Qd2+=) 16.Qf3+= Bc6 17.Qf5 Bd7 (17...Kb8 18.Nb5 Bb5 A) worse is 19.Rb5 h4 20.Rfb1 hg3 21.Rb7 Ka8 22.fg3 Rb8= (22...Qa2? 23.Qb5 Qb1 24.Qb1+–); B) 19.Qb5 Qb5 20.Rb5 Bg3 21.fg3+/–) 18.Qg5+/– h4 19.Nf5 Bb4? (better is 19...Bf8!? 20.Rfe1 h3 21.Re8 Ne8+/–) 20.Ne3+– (20.Qg7 Bf5 21.Qf6 Bc2 22.Rb4 Qb4+=) 20...Qd4 21.Ncd5 Qc5 22.Rb4 Nd5 (22...Re3 23.Bf6 gf6 24.Qe3 Qd5 25.Qa7+–) 23.Rc4 Qc4 (23...Qc7 24.Rc7 Nc7 25.Rd1+–) 24.Nc4 Re6 (24...f5 25.Nd6 Kc7 26.Ne8 Re8 27.Qh4+–) 25.Qd5 Rhe8 (25...Bc6 26.Qf5 Rd8 27.Bg7+–) 26.Nd6 Rd6 27.Qd6 f6 28.Rd1 (28.Rd1 Bb5 29.Qc5 Bc6 30.Qf5 Kc7 31.Qf4 Kc8 32.Qg4 Kc7 33.Qg7 Kb6 34.Bf6+–) 1–0. Rosner,Dirk – Scheidgen, email, 1999.

4.Be2 f5 5.c4 Nf6 6.Nf3 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 Be6).

4.Be2 Qg5 5.Bf1 =+.

4.Be2 g6 5.f4 (5.Nf3 Nc6=) 5...Nd7 (5...Qh4 6.g3 Qd8 7.Nf3=) 6.b5 (better is 6.Nf3+=) 6...ef4?? (better is 6...Qh4 7.g3 Qh6=) 7.Bh8+– Qh4 8.Kf1 f6 (8...fe3 9.de3 Ngf6 10.Nc3+–) 9.Nf3 Qh5 (9...Qh6 10.Nd4 Bf7 11.e4+–) 10.Nd4 Qe5 11.Ne6 Qe6 12.ef4 (12.Bf3 fe3 13.Bb7 Qf5 14.Bf3 Qb5 15.Qe2 Rb8 16.Qb5 Rb5+–) 12...0–0–0 (12...Nh6 13.Bf3 Qg8 14.Qe2 Be7 15.Nc3 (worse is 15.Bb7 Rb8 16.Bf6 Nf6 17.Bc6 Kf8+–) 15...Qh8 16.Nd5+–) 13.Kf2 Bh6 14.g3 (better is 14.b6!? Nb6 15.Re1 Qd5 16.Bg4 Kb8+–) 14...Ne7 15.Bf6 (better is 15.Bg4!? Nf5 16.Qe2 Qe2 17.Ke2 Rh8 18.Bf5 Re8 19.Kf3 gf5+–) 15...Qf6 16.Nc3 (16.c3 g5+/–) 16...g5+/– 17.Ke1 (17.f5 Nf5 18.Rf1 Bg7+/–) 17...gf4 18.Rf1 Qe5 (18...Qe6 19.gf4 Rf8 20.d4+=) 19.gf4 (19.d4!? Qf6 20.Bg4+/–) 19...Bf4 20.Rf3 (20.d4 Qg5 21.Qd3 Ng6+/–) 20...Rg8 (better is 20...Nf5=) 21.Kf2 (better is 21.d4 Rg1 22.Rf1 Rf1 23.Kf1=) 21...Qd4 (21...Bh2 22.d4 Bg1 23.Qg1 Qd4 24.Re3 Rg1 25.Rg1–+) 22.Re3?? (22.Ke1 Bh2 23.Bf1 Bg3 24.Rg3 Rg3 25.Qh5–+) 22...Be3–+ 23.de3 Qc3 0–1. Larsen,Andreas – Berntsen,Frode, NOR–ch M3 Norway, 1997.

4.Ne2 Nd7 5.Ng3 g6 6.d4 f6 (6...Ngf6!?+=) 7.d5+= Bf7 8.Bb5 a6 9.Ba4 b5 10.Bb3 Nb6 11.0–0 Bg7 12.c4?? (better is 12.Nc3+=) 12...bc4–+ 13.Ba4 Na4 14.Qa4 Qd7 15.Qd7 Kd7 16.e4 Bh6 17.Rd1 Ne7 18.Nd2 (18.Bc1 Bg7–+) 18...Bd2 (18...Rhb8 19.a3 Bd2 20.Rd2–+) 19.Rd2–/+ Nc8 (19...Rhb8 20.Bc3–/+) 20.a4 a5 (20...Rb8 21.Ba3–/+) 21.ba5 Ra5 22.Bc3 Ra6 (22...Ra8 23.a5+=) 23.Rb2 Rb6 (23...Ra7+=) 24.a5? (better is 24.Rb6!? cb6 25.Rb1+=) 24...Rb2–/+ 25.Bb2 Na7 26.Bc1 Nb5 27.a6 Ra8 (27...c3 28.Ne2–/+) 28.Be3 (28.Ne2 c6 29.dc6 Kc6–+) 28...c5 (28...Nd4 29.a7–+) 29.Rb1 (better is 29.dc6!? Kc6 30.Ne2–+) 29...Nc7–+ 30.Rc1 (30.Nf1 Ra6 31.Rc1 f5–+) 30...Ra6 (30...f5 31.ef5 Bd5 32.fg6 hg6 33.f3–+) 31.Rc4 (31.Nf1 f5 32.f3 f4–+) 31...Ra1 (31...f5!? 32.ef5 gf5 33.Nf5 Nd5 34.Rc1–+) 32.Rc1 Rc1 (32...Ra2 33.Nf1–+) 33.Bc1 Nb5 34.Ne2 Kc7 35.f3 Kb6 36.Kf2 Ka5 37.Ke1 (better is 37.Bd2!? Ka6 38.Bh6–/+) 37...Kb4–+ 38.Bh6 c4 39.Bg7 (39.Kd2 Kb3–+) 39...f5 40.Bf6 (40.ef5 gf5 41.f4 ef4 42.Nf4 Kc5–+) 40...fe4 41.fe4 c3 42.Be7 (42.Bg5 Be8–+) 42...Kc4 43.Kf2 (43.Ng1 Kd3 44.Nh3 c2 45.Nf2 Kc3–+) 43...Kd3 44.Kf3 Nd4 45.Nd4 ed4 (45...Kd4?! 46.Bd6 g5 47.Bf8+=) 46.Bd6 (46.Bf6–+) 46...c2 (better is 46...Kc2 47.Kf4 d3–+) 47.Bf4= Kc3 48.Bc1 d3 49.Ke3 g5 50.d6 Be6 51.h3 h5 0–1. Vasilev,Sergey – Oberfrank,Istvan (1775), First Saturday FM–B Oct, 2014.

4.Qf3 c6 5.Nc3 Nf6 6.h3 Be7 7.g4 Nbd7 8.g5 Nd5 9.Nd5 Bd5 10.e4 Be6 11.h4 a5 12.b5 a4 13.a3 Rc8 14.Ne2 d5 15.Rg1 d4 16.c3 c5 17.Ng3 f6 18.c4 Nb6 19.d3 Kd7 20.Bc1 Kc7 21.Bd2 Nd7 22.Be2 Rf8 23.Bd1 Ra8 24.Qg2 Bd6 25.Bc2 Nb6 26.Qf1 f5 27.0–0–0 f4–/+ 28.Nh1 Qb8 29.f3 1–0. Kelly,Laszlo (2205) – Samu,Gabor (2090), HUN–chT3, 2003.

4.Nf3 a5 5.b5 Nd7 6.d4 e4 7.d5 Bg4 8.h3 Bh5 9.g4 Bg6 10.Nd4 Ngf6 11.c4 Nc5 (11...Ne5 12.Nd2=) 12.h4 h6 13.h5 Bh7 14.Nd2 Be7 15.Rg1 Qd7 16.Be2 0–0–0 (16...Qd8 17.N4b3=) 17.b6 cb6 18.Rb1 Ne8 19.Ba1 Bf6 20.Rb6 Nd3? (better is 20...Qc7 21.Rb1 Rg8+/–) 21.Bd3+– ed3 22.Nb5 Ba1 23.Qa1 Qe7 24.Na7 (better is 24.Qb1 Kb8 25.Nd4+–) 24...Kb8 (24...Kc7 25.Qb2 Rb8+–) 25.Nc6 Kc7 26.Qb1 Qf6 27.Rb7 Kc8 28.Na7 1–0. fajgo – karpouf2, internet, 2002.

4.Nf3 c6 5.b5 Qb6 6.c4 a6 7.a4 f6 8.Bc3 ab5 9.ab5 Ra1 10.Ba1 d5 11.bc6 bc6 12.cd5 Bd5 13.Be2 Bb4 14.0–0 Ne7 15.d4 e4 16.Nfd2 0–0 17.Qc2 Nd7 (17...f5!?+=) 18.Ne4+/– Ra8 19.Bc3 (19.Nbc3 f5 20.Ng3 Be6+/–) 19...Ra2 20.Qd1 Be4 (better is 20...Re2 21.Qe2 Be4 22.Qc4 Nd5 23.Bb4 Qb4 24.Qc6 Nf8+=) 21.Bb4?? (better is 21.Bc4 Bd5 22.Ba2 Ba2 23.Qa4+–) 21...Qb4–+ 22.Bd3 Bd3 23.Qd3 Nd5 24.g3 N7b6 25.Qe4 Nc7 (better is 25...Qe7!? 26.Qe7 Ne7–+) 26.Qc6–/+ Ne6?? (better is 26...Nba8–/+) 27.Qe6+– Kf8 28.Qa2 Nc4 29.Rc1 Nb2 30.Qa7 Nc4 31.Qc5 Qc5 32.dc5 Ne5 33.c6 Nc6 34.Rc6 Kf7 35.Nc3 Kg6 36.f4 h5 37.h3 Kf5 38.e4 Kg6 39.e5 Kf5 40.ef6 gf6 41.Rc5 Kg6 42.h4 Kh6 43.f5 Kg7 44.Ne4 Kh6 45.Nf6 Kg7 46.Nh5 Kh6 47.f6 Kg6 48.Rg5 Kf7 49.Rg7 Kf8 50.f7 1–0. Valpa – Spion, playchess.de, 2004.

4.Nf3 g6 5.d4= f6 (5...d5 6.a3=) 6.b5 (6.Bb5 c6 7.d5 Bg4+=) 6...Bg7= 7.c4 Ne7 8.Be2 0–0 (8...e4 9.Nfd2 d5 10.cd5 Bd5 11.Nc3+=) 9.0–0 Nd7 10.Nc3 d5 11.cd5 Nd5 12.Nd5 Bd5 13.de5 Ne5 14.Ne5 fe5 15.Qc2 e4 (15...Qg5 16.e4 Bf7+=) 16.Bg7+= Kg7 17.Rad1 c6 18.Bc4 (18.bc6 bc6 19.Rb1 Rb8+=) 18...Rc8 19.bc6 bc6 ½–½. Geyer,Ulf – Diesterweg,Ulli, RLPF–ch U15 Germany, 1989.

4.Nf3 Nh6 5.d4 f6 (5...d5 6.Ne5 Bb4 7.c3=) 6.d5+= Bf7 7.Bc4 Nd7 8.0–0 Be7 (8...c6 9.Nc3+=) 9.Nbd2 (9.Nc3 f5+=) 9...0–0= 10.e4 (10.Bb3 a5 11.a3 f5=) 10...c6 (10...f5 11.Re1=) 11.dc6 bc6 12.Bf7 Rf7 13.c4 Qb6 14.a3 (14.Rb1 f5=) 14...c5 (14...a5 15.b5=) 15.Qa4+= Rd8 16.Rad1 f5 17.Rfe1 f4 (17...Qc7 18.Qc2+=) 18.Re2 g5 19.h3 Rg7 20.Bc3 g4 21.hg4 Ng4 22.Qc2 Rg6 (22...Kf8 23.Nb3+=) 23.Qd3 Qb7 (23...Kf8 24.b5+=) 24.Nb3 Kh8 (24...Rc8 25.Na5 Qc7 26.b5+/–) 25.Na5 Qc7 26.b5 Rdg8 27.Nc6 Bf8 (27...Nb8 28.Ba5 Qb7 29.Ne7 Qe7 30.Red2+=) 28.Ba5 (28.Nh4 Rg5+/–) 28...Qb7 (28...Nb6 29.Nh4 Rg5 30.Bb6 ab6 31.Nf3+/–) 29.Nh4 Rg5?? (better is 29...Rf6+/–) 30.Nd8+– Rh5 (30...Qc8 31.Nf7 Kg7 32.Ng5+–) 31.Nb7 Rh4 32.Bc7 Ndf6 (32...Rg6 33.Red2 Ngf6 34.Bd6+–) 33.Nd6 Rg6 (33...Rg7 34.Nf5 Rd7 35.Qb3+–) 34.Nf5 Rh5 35.f3 Nh6 36.Qd8 Kg8 37.Bd6 (37.Bd6 Nd7 38.Ne7 Kg7 39.Ng6 hg6 40.Qd7 Nf7 41.Bf8 Kf8 42.Qa7+–) 1–0. mrkt (2310) – burak542001 (2100), ICC, 2003.

4.f4 Nd7 5.Nf3= e4 6.Ng5 Bd5 7.c4 h6 8.cd5 hg5 9.Qc2 gf4 10.Qe4 Ne7 11.Qf4 Nd5 12.Qe4 Ne7 13.Nc3 Nf6? 14.Qb7+/– Rh5 15.Bb5+– Nd7 16.0–0 g6? 17.Rac1 c6? 18.Bc6 Nc6 19.Qc6 Rc8 20.Qe4 Re5 21.Qf4 Rf5 22.Qe4?? Qe7?? 23.Qe7+– Be7 24.Rf5 gf5 25.Nd5 Bg5 26.Rc8 Bd8 27.Nf6 Ke7 28.Nd7 Kd7 29.Rd8 Kd8 30.Bd4 a6 31.a4 Kd7 32.h4 Ke6 33.Kf2 d5 34.Kf3 Kd7 35.Kf4 Ke6 36.h5 f6 37.b5 ab5 38.ab5 (38.ab5 Kd7 39.h6 Ke7 40.h7 Kf7 41.h8Q Ke6 42.Qf6 Kd7 43.b6 Ke8 44.Bc5 Kd7 45.Qd6 Kc8 46.Qc7#) 1–0. Eralos (2060) – pristinha (1840), ajedrez21.com, 2002.

4.g3 Nf6 5.Bh3 d5 6.b5 b6 7.Be5+= Nbd7 8.Be6 fe6 9.Nf3 Ne5 10.Ne5 Bd6 11.Nc6 Qd7 12.c4 a6 13.Qa4 0–0 14.ba6 Be5 15.d4+/– Bd6 16.0–0 dc4 17.Qc4 Ra6 18.Nc3?? Rfa8?? 19.f4?? b5!–/+ 20.Qb5 Ra3?? 21.Qc4+– R8a6? 22.Nb8 Qe8 23.Na6 c5 24.dc5 Be7 25.Qe6 Qf7 26.Qf7 Kf7 27.c6 Ra6 28.c7 Rc6 29.Nb5 Ne4 30.Rac1 Nd2 31.Rc6 Nf1 32.c8Q Ne3 33.Qe6 Ke8 34.Qe3 h6 35.a4 Kd7 36.Qe6 Ke8 37.Nd6 Kd8 38.a5 Bd6 39.Qd6 Ke8 40.a6 g6 41.a7 Kf7 42.h3 Kg7 43.h4 h5 44.Kf2 Kh6 45.f5 Kh7 46.f6 Kg8 47.Kf3 Kf7 48.g4 hg4 49.Kg4 Ke8 50.h5 gh5 51.Kh5 Kf7 52.Qd7 Kf8 53.Rc8 (53.a8Q) 1–0. willi_weizenkeim – Gandalf_8, playchess.de, 2003.

4.a3 Nc6

5.c4 a6 6.Nf3 Nf6 7.Nc3 Be7 8.Be2 h5 9.d4 ed4 10.ed4 Bg4 11.0–0 h4 12.d5 Bf3 13.Bf3 Ne5 14.Re1 Nf3 15.Qf3+/– Qd7 16.Ne4 0–0–0 17.Nf6 gf6 18.Bf6 Bf6+= 19.Qf6 Rdg8 20.g3 Qh3 21.Re2 hg3 22.fg3 Rg3?? 23.hg3+– Qh1 24.Kf2 Rh2 25.Ke3 Re2 26.Ke2 Qg2 27.Qf2 Qe4 28.Kf1 Qd3 29.Qe2 Qf5 30.Qf2 Qd3= 31.Kg1 (31...b5 32.Kg2 bc4 33.Qf7 Qd2 34.Kh3+–) 1–0. slavisa10 – pok, Live Game Caissa's Web, 2004.

5.Nf3 Qd7 6.c4 0–0–0 7.d3 f5 8.Nbd2 g5 (8...f4 9.Be2=) 9.h3 (better is 9.Ng5!? Bg7 10.Ne6 Qe6 11.Be2+/–) 9...h6= 10.Be2 Nf6 11.Qa4 Kb8 12.b5 Ne7 13.d4 ed4?? (13...Ng6 14.de5 de5 15.Rd1=) 14.Nd4?? (better is 14.Bd4 Nc8 15.Bf6+–) 14...Ne4?? (better is 14...Bg7=) 15.Ne6+– Qe6 16.Bh8 Nd2 17.Kd2 d5 18.Bd4 dc4 (18...Nc8 19.c5+–) 19.Bc4 (better is 19.Qa7 Kc8 20.Qa8 Kd7 21.Qb7 Nc8+–) 19...Qe4 (19...Rd4 20.ed4 Qe4+–) 20.Qa7 Kc8 21.f3 Rd4 22.Qd4 (22.Qd4 Qd4 23.ed4+–) 1–0. Fournier,Frederic – bellard jynckx, Partie amicale, 0m + 5s, 2008..

5.Nf3 Nf6 6.c4 e4 7.Ng5 h6 (better is 7...Bg4!? 8.Qc2 Bf5+=) 8.Ne6+/– fe6 9.d3 ed3 10.Bd3 a5 (10...Qd7!?+/–) 11.Bg6 Ke7 12.b5 Ne5 13.Be5 de5 14.Qf3 Rb8 15.Nc3 Qd3?? (better is 15...e4 16.Ne4 Qd3+–) 16.Bd3 (16.Bd3 Kf7 17.Qg3+–) 1–0. miehnekort – newphoneline. Yahoo, 2005.

4.a3 Nd7

5.Nf3 Nb6 6.Be2 Be7 7.0–0 Bf6 (7...c6 8.e4=) 8.Nc3 (8.d4 Nc4 9.Bc4 Bc4+=) 8...Ne7 9.Ne4 Ng6 10.d4 0–0 11.Nf6 (11.de5 Be5 12.Ne5 de5=) 11...gf6 (11...Qf6 12.e4=) 12.h4 (12.Bd3!?+=) 12...Bg4 (12...Na4 13.Qc1=) 13.Nh2 (13.Rb1 Re8=) 13...Be2 14.Qe2 Nh4 15.de5 (15.Ng4!?=) 15...fe5+= (worse is 15...de5 16.Rad1 Qe8 17.Qg4 Ng6 18.Qf3=) 16.f4 (16.Rad1 Qg5 17.f4 Qg7+=) 16...Na4–/+ 17.Bc1 (17.c4 Nb2 18.Qb2+=) 17...Kh8 (better is 17...e4!?–/+) 18.fe5= Rg8 19.Rf2 (19.g4 Qe7 20.ed6 cd6=) 19...Qg5+= Can g2 get defended? 20.e4? (better is 20.Nf3 Nf3 21.Qf3 Qe5 22.Rb1+=) 20...Qe5–+ 21.c3 Nc3 22.Qe1 (22.Qc2 Qd4 23.g4–+) 22...Na4 (better is 22...Ng2!? 23.Rg2 Rg2 24.Kg2 Ne4–+) 23.Raa2 Rg3 (23...Rg7!?–+) 24.Bf4–/+ Rg2 25.Rg2 Do you see the mate threat? 25...Qf4 26.Rgf2 Rg8 (better is 26...Qg3 27.Kh1 Rf8–/+) 27.Kf1? (better is 27.Kh1 Qg3 28.Qa1 Rg7 29.Rac2=) 27...Qg3–+ 28.Qa1?? (28.Rac2 Qd3 29.Qe2 Qh3 30.Ke1 Nc3 (30...Qa3?! 31.Qc4 Qe3 32.Qe2 Qe2 33.Ke2–+) 31.Rc3 Qc3 32.Qd2 Rg1 33.Ke2 Qc4 34.Ke3 Kg8–+) 28...Rg7 (better is 28...Nc3 29.Qc3 Qc3–+) 29.Qd4 Nc3 (better is 29...c5 30.bc5 Nc5–/+) 30.Rf7= The mate threat is Rf8. 30...Qg1?? (30...h5 31.Rg7 Qg7 32.Qg7 Kg7+/–) 31.Qg1+– Rg1 32.Kg1 Na2 33.Rc7 b5 (33...h5 34.Rc2 (worse is 34.Rb7 Nc3+–) 34...Kg7 35.Ra2+–) 34.Rc2 (34.Rc2 Kg7 35.Ra2+–; 34.Ra7?! Nc3+–) 1–0. Mear,D – Winn,Eric, Durham op, 2003.

5.Nf3 f5 6.d3 Ngf6 7.c4 Be7 8.Be2 0–0 9.0–0 Qe8 (9...Nb6 10.Nbd2=) 10.Nbd2 (10.Ng5 Bd8+=) 10...h6 11.Rc1 g5 12.h3 (12.d4 e4 13.Ne1 d5+=) 12...Qg6 13.Nh2 h5 Black plans g4 14.f4 g4 15.hg4 hg4 16.fe5 de5 17.g3 (17.Nb3!?=) 17...Qg5 18.e4 (18.Kf2!?+=) 18...Qe3 19.Kh1? (19.Kg2 A) 19...fe4 20.Ng4 Qg5 21.Nf6 (worse is 21.Ne4 Ng4 22.Rf8 Nf8 23.Ng5 Ne3 24.Kf3 Nd1 25.Ne6 Nb2 26.Nc7 Rd8+=) 21...Nf6 22.Ne4 Ne4 23.de4+=; B) 19...f4 20.gf4 Qh3 21.Kg1 g3–+) 19...fe4 (better is 19...Nh5!? 20.Rg1 Ng3 21.Rg3 Qg3 22.ef5 Bf5–+ (22...Rf5?! 23.Ne4 Qh4 24.Bg4+=)) 20.de4 Ne4 21.Ne4? (better is 21.Bg4!? Ng3 22.Kg2–/+) 21...Qe4–+ 22.Kg1 Qe3 (better is 22...Bg5 23.Rc3 Be3 24.Re3 Qe3 25.Kh1 Nf6–+ (25...Qg3 26.Rg1 Qh4 27.Bg4=)) 23.Kh1–/+ Qg3?? (better is 23...Rf1 24.Nf1 Qe4 25.Kg1 a5–/+) 24.Rg1+– Qh3? (24...Qh4 25.Bg4 Rf2 26.Be6 Kh8+–) 25.Bg4 Bg4 26.Qg4 (better is 26.Qd7! Rf4 27.Qe7+–) 26...Qg4+= 27.Rg4 (better is 27.Ng4 Kf7 28.Ne5 Ne5 29.Be5+=) 27...Kf7–/+ 28.Rcg1 Rg8 29.Rg8 Rg8 30.Rg8 Kg8 31.Nf3 Bf6 32.Nd2 Kf7 33.Ne4 Ke6 34.Kg2 b6 35.Kf3 a5 36.b5 Be7 37.a4 Nc5 (better is 37...Bd6!?–/+) 38.Nc5= Bc5 (worse is 38...bc5 39.Bc3+/–) 39.Ke4 Bd6 40.Bc3 Kf6 (40...c6=) 41.Bd2 (41.Kd5!? Ke7 42.Be5 Be5 43.Ke5+=) 41...Ke6 (41...Bb4!? 42.Bc1 Bc3+=) 42.Bc3= Kf6 43.Bd2 (better is 43.Kd5!? Ke7 44.Be5 Be5 45.Ke5+=) 43...Bb4+= 44.Be3 (44.Bc1 Bc3+=) 44...Bc3 (44...Ke6 45.Bf2–/+) 45.Bc1 Ke6 46.Bg5 Kd6 47.Bf6? (47.Be3 Be1–/+) 47...Bd4 (better is 47...Kc5 48.Kd3 Kb4–+) 48.Bg7?? (better is 48.Kd3–/+) 48...Kc5–+ 49.Be5 (49.Bf6 Kc4 50.Be7–+) 49...Be5 50.Ke5 (50.Kd3 Kb4 51.Ke4 Ka4 52.Ke5 Kb3–+) 50...Kc4 51.Ke6 Kb4 52.Kd7 (52.Kd5 Ka4 53.Kc4 Ka3–+) 52...Ka4 53.Kc7 Kb5 (53...Kb5 54.Kd6 Kc4–+) 0–1. Fournier,Frederic (1775) – jorgep (1640), Active, 2006.

5.Nf3 Ngf6 6.Be2=.

4.a4 Nf6

5.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.a4).

5.Nf3 =+.

4.b5 Nd7

5.c4 a6 6.d4 +=.

5.c4 Ngf6 6.a4 a6 7.Nf3 Be7 8.Be2 0–0 9.0–0 ab5 10.ab5 Ra1 11.Ba1 Bg4 12.Nc3 h6 13.Qc2 Re8 14.d4 ed4 15.Nd4 Be2 16.Qe2 Qc8 17.Nb3 (17.Nd5 Nd5 18.cd5 Bf6+=) 17...b6 (17...Nb6 18.Rd1=) 18.Bb2 Ne5 19.Nd5 Bd8 20.f3 Nd5 21.cd5 Bf6 22.e4 Nd7 23.Bf6 Nf6 24.Qc4 Nd7 25.Ra1 Qb7 (25...Ne5 26.Qc2+/–) 26.Qa4 (26.Qc6!? Qc6 27.bc6+/–) 26...Nc5+= 27.Nc5 dc5 28.Kf2 f6 29.Qc4 Kf8 30.Ra6 Ke7 31.Qa2 Kd6 32.Ra7 Qb8 33.Qa6 (33.Ra4 Qd8+/–) 33...Qc8 (33...f5 34.g3 fe4 35.fe4 Qd8+= (35...Re4?? 36.Ra8 Re8 37.Rb8 Rb8 38.Qa1+–)) 34.Rb7 (better is 34.Qa3+/–) 34...f5+= 35.Qa7? (better is 35.h3+=) 35...fe4–+ 36.fe4 0–1. Huelle,Gunter – Ott,Herbert, Leipzig VfB op, 2005.

5.c4 Ngf6 6.Nf3 Be7 7.Be2 0–0 (7...a6 8.ba6 Ra6 9.d4+=) 8.d4= e4 9.Nfd2 c6 10.Nc3 d5 (10...cb5 11.d5 Bf5 12.cb5=) 11.cd5 (11.0–0 cb5 12.cd5 Nd5 (worse is 12...Bd5 13.Nd5 Nd5 14.Ne4+=) 13.Nde4 Nc3 14.Nc3 b4=) 11...cd5 12.0–0 Rc8 (12...Bd6 13.Rc1=) 13.Rc1 (13.Qa4 Qb6=) 13...Ne8 (13...Qb6 14.f3=) 14.f3 f5 (14...ef3 15.Bf3 Nef6 16.Qa4=) 15.f4 (15.Qa4 f4 16.fe4 fe3 17.Rf8 Nf8+/–) 15...g5 (15...Nd6 16.Ba3=) 16.g4 (16.Qb3 gf4 17.Rf4+=) 16...Ng7 (16...gf4 17.gf5 Rf5 18.Bg4–+) 17.gf5 (17.Qb3!? gf4 18.Nd5 Rc1 19.Rc1+=) 17...Nf5–/+ (worse is 17...Rf5 18.Bg4+=) 18.Bg4 Qe8 (18...gf4 19.Rf4 Bg5 20.Nd5 Rc1 21.Bc1–/+) 19.Bf5 (19.Bh5!? Bf7 20.Bf7 Qf7 21.fg5+=) 19...Rf5–/+ 20.Kh1 Kh8 (20...gf4 21.Qg4 Kh8 22.Rf4–/+) 21.Nce4+= Rc1 (21...de4 22.d5 Nf6 23.de6 gf4 24.Ne4 Rc1 25.Qc1+–) 22.Qc1 g4?? (22...gf4 23.Rf4 Rf4 24.ef4 Nf6+=) 23.Ng3+/– Rf8 24.f5 Bf7 (24...Bg8+/–) 25.e4 (25.Qc7!?+/–) 25...de4+= 26.Nde4 (26.Nge4 Bd5 27.Kg1 Bb4= (worse is 27...Ba2 28.d5 Kg8 29.Rf4+=)) 26...Bd5 (26...Nf6 27.Nc3=) 27.Kg1 Bh4 (27...Nf6 28.Nc3 Bc4 29.Re1+=) 28.Re1 Qb8 (28...Qf7 29.Ba3 Re8 30.Nd6 Re1 31.Qe1+/–) 29.Qe3 Nb6 (29...Re8!? 30.Qc3 Nf6 31.Nf6 Bf6+=) ½–½. Deutekom,A – Lukacs,Milko, Haarlem AKN, 1994.

4.Qf3 c6 5.Nc3 Nf6 6.h3 Be7 7.g4 Nbd7 8.g5 Nd5 9.Nd5 Bd5 10.e4 Be6 11.h4 a5 12.b5 a4 13.a3 Rc8 (13...d5 14.Rh2–/+) 14.Ne2 d5 15.Rg1 d4 16.c3 c5 17.Ng3 f6 (17...0–0+=) 18.c4 (18.Nf5 Bf5 19.ef5 Qb6+=) 18...Nb6 (18...fg5 19.Nh5 Rg8 20.hg5–/+) 19.d3 (19.Nh5 0–0 (19...fg5? 20.Ng7 Kd7 21.Ne6 Ke6 22.Bh3 Kd6 23.Bc8 Nc8 24.hg5+–) 20.Ng7 Kg7 21.gf6 Kh8 22.fe7 Qe7–/+ (worse is 22...Rf3 23.ed8Q Rd8 24.d3+=)) 19...Kd7 (19...fg5!? 20.Nh5 A) 20...gh4? 21.Ng7 Kd7 22.Bh3 (22.Ne6?! Ke6 23.Bh3 Kd6+–) 22...Bh3 23.Qh3 Kd6 24.Nf5 Kc7 25.Rg7+–; B) 20...Rg8 21.hg5 g6 (21...Bg5?! 22.Bh3 Bd7 23.Bc1=) 22.Nf6 Bf6 23.gf6 Rf8–/+) 20.Bc1 (20.Nh5 Rg8 21.g6 h6=) 20...Kc7 21.Bd2 (21.Nh5 Rg8=) 21...Nd7 (21...fg5 22.Nf5 g4 23.Ng7 gf3 24.Ne6 Kb8 25.Nd8 Rcd8 26.Rg3 Bh4 27.Rh3+=) 22.Be2 (22.Nf5 Qf8=) 22...Rf8 (22...fg5 23.Nf5 Bf5 24.ef5 gh4 25.Qd5+=) 23.Bd1 (23.Qh5 fg5 24.hg5 Rf7=) 23...Ra8 (23...fg5 24.Qh1 g4 25.Nf5 Bf5 26.ef5–/+) 24.Qg2 (24.Nh5 fg5 25.Ng7 Bg8=) 24...Bd6 (24...fg5!? 25.hg5 Bg5–/+) 25.Bc2 Nb6 (25...g6 26.0–0–0+=) 26.Qf1 (26.gf6 Qf6 (worse is 26...Rf6 27.Bg5+/–) 27.Nh5 Qh4=) 26...f5 (26...Qd7 27.Qg2+=) 27.0–0–0 (27.ef5!? Bf5 28.Nf5 Rf5 29.Bd1=) 27...f4–/+ 28.Nh1 Qb8 (28...Qe8 29.Qg2–/+) 29.f3 1–0. Kelly,Laszlo (2205) – Samu,Gabor (2090), HUN–chT3, 2003.

5.Nf3 Be7 6.c4 Ngf6 7.a4 0–0 8.Be2 c6 9.0–0 a6 10.d4 ab5 11.ab5 Ra1 12.Ba1 Qa8 13.Nc3 Bf5 14.Qb3 Qa5 15.Bb2 Qc7 16.Ra1 h6 17.Nd2 ed4 18.ed4 Rb8 19.Bf3 Bg6 20.g3 Kh8 21.Bg2 Bf5 22.Nce4 Bg6 23.Nc3 Bf5 24.Ne2 Bg6 25.Nf4 Bf5 26.Ra7 Qb6 27.Qa4 (27.Ra2 Kg8+=) 27...Bc2 28.Qa5 Qa5 29.Ra5 c5? (better is 29...g5 30.Ne2 d5=) 30.Ra7+– b6? (30...g5 31.Nd5 Nd5 32.Bd5+– (32.cd5?! Kh7+=)) 31.Bc6 (31.dc5 Bf8 32.c6 Ne5+–) 31...Bf5? (better is 31...Rd8+–) 32.dc5 dc5 33.Bf6 Bf6 34.Bd7 (worse is 34.Rd7 Bd7 35.Bd7 Rd8–/+) 34...Bd7 35.Rd7 Bg5 36.Rf7 Rd8 37.Nf3 Bf6 (37...Rd1 38.Kg2 Bf4 39.gf4+–) 38.Nd5 Kg8 39.Rb7 Rd6 40.Rb6 Rb6 41.Nb6 Bd8 42.Nd7 Be7 (42...g5 43.b6 g4 44.Nfe5+–) 43.Nfe5 Bd6 44.b6 g5 (44...Be7+–) 45.b7 Kg7 46.b8Q (better is 46.f4 gf4 47.gf4 Bc7+–) 46...Bb8 47.Nb8 Kf8 (47...Kf6 48.Ned7 Kf5 49.Nc5+–) 48.Ned7 Ke7 49.Nc5 Kd6 50.Nca6 Ke7 51.c5 Kd8 52.c6 Kc8 53.Nd7 Kd8 54.Nb6 h5 55.c7 Ke7 56.c8Q 1–0. Huelle,Gunter – Gahn,Cornelia, Leipzig VfB op, 2003.

4.b5 e4

5.Nc3 Nf6=.

5.c4 Nd7 6.Qc2 Nc5 7.Bd4=.

5.c4 Nd7 6.Bd4+=.

5.Ne2 Qg5 6.Nf4 Bg4=.

5.c4 c6

6.a4 d5 7.Qc2 Nd7 (7...Nf6 8.Ne2+=) 8.Nc3 (8.Ne2 dc4 9.bc6 Nc5=) 8...Ngf6 9.Nge2 (9.bc6 bc6 10.Nge2 dc4+=) 9...Be7 (9...dc4!? 10.bc6 Nc5+=) 10.Nd4+= c5 (10...Qc7 11.Rc1 Nc5 12.f3 ef3 13.gf3+=) 11.Nde2 (11.cd5 cd4 12.de6 dc3 13.ed7 Qd7 14.dc3 0–0+=) 11...Ne5= 12.Nf4 dc4 (12...Nd3 13.Bd3 ed3 14.Ne6 fe6 15.Qd3+/–) 13.Ne4+= Nd3 14.Bd3 (14.Nd3 Ne4 15.Nf4 Bf5+=) 14...cd3+= 15.Nf6 (15.Qd3!? Qd3 16.Nf6 (16.Nd3? Ne4 17.Nf4 Bh4–+) 16...Bf6 17.Nd3+=) 15...Bf6= 16.Nd3 Bf5 17.Bf6 (17.Ra3 Qd5 18.Nf4 Bc2 19.Nd5 Bb2–/+) 17...Bd3 (better is 17...Qf6!? 18.Ke2 Rd8+=) 18.Bd8+= Bc2 19.Ba5 Bd3 20.Bc3 f6 21.f4 (21.h4 a6 22.b6 Rd8+=) 21...Ke7 (21...a6 22.b6+=) 22.Kf2+= Kd6 (22...Rhe8 23.Rhe1+=) 23.h4 h5 24.Kf3 (24.Rhg1 Rad8+=) 24...Rae8 (24...Kd5 25.Rhg1+=) 25.Rhg1 (25.Ra3 Kd5+=) 25...Bf5 (25...Re7 26.Ra3 Kd5 27.Rc1+=) 26.Rac1 c4 27.Bd4+/– Kd5 28.Rc3 a6 29.Ra1 Ra8 30.Rca3 Rhd8 31.g3 (31.b6 Rac8+=) ½–½. Onoprienko,Elena – Platonova,Lubov, 14th Chigorin Mem B, 2006.

6.a4 d5 7.Nc3 Nf6 8.bc6 Nc6 9.cd5 Bd5 10.Nd5 Qd5 11.Bf6 gf6=.

6.a4 d5 7.bc6 Nc6 8.cd5 Bd5=.

6.a4 d5 7.g3 Nh6 (7...dc4 8.Qc2–/+) 8.Bg2 (8.cd5 cd5 (worse is 8...Qd5 9.Nc3 Qe5 10.Bg2+=) 9.Ne2 Nd7+=) 8...Bg4 (8...Nd7 9.cd5 Bd5 10.d3–/+) 9.Qc2 Be7?? Black gets the initiative (9...Bf5 10.Nc3 Nd7 11.cd5 cd5 12.Nd5=) 10.Nh3?? (better is 10.Bg7 Bf6 11.Bh8 Bh8 12.Nc3+–) 10...Bf6 11.0–0 (11.Nc3 0–0 12.cd5 cd5 13.Nf4+=) 11...Be2–/+ 12.Re1 (12.Rc1 Bc4 13.Nf4 a6 14.bc6 Nc6= (worse is 14...bc6 15.Na3+/–)) 12...Bd3 13.Qc1 Bc4 14.Na3 (14.Bf6 Qf6 (worse is 14...gf6 15.Na3+=) 15.Nc3 Bd3+=) 14...Bd3 (14...Bb3 15.a5–/+) 15.Bf6 (15.Nf4 0–0+=) 15...Qf6 (worse is 15...gf6 16.Nf4+/–) 16.Nf4 Ng4 17.Bh3? (better is 17.Nd3 ed3 18.f3+=) 17...Ne5–+ 18.Bg2 0–0 (18...Nbd7 19.a5 Rb8 20.a6–+) 19.Qc3 Nbd7 20.bc6 Rac8 (20...bc6 21.Rec1–+) 21.Qa5? (better is 21.Nd3!? Nd3 22.Qf6 Nf6 23.cb7+=) 21...bc6 (21...b6 22.Qd5 Nc5 23.Nd3 Ned3 24.Rf1 Qc6 25.Qc6 Rc6 26.f3–/+) 22.Qa7–+ Ra8 23.Qd4 g6 (23...Ra5!?–+) 24.Rec1+= Kg7 (24...Rfc8 25.Rc3+=) 25.f3 Kh6 (25...ef3 26.Nd3 Nd3 27.Qd3 fg2 28.Qc2–/+) 26.Nc2 (26.fe4 Be4 27.Be4 de4 28.Qe4+/–) 26...Qd6?? (better is 26...Bc2 27.Rc2 c5+= (worse is 27...Nf3 28.Bf3 ef3 29.Qf6 Nf6 30.Rc6+=)) 27.fe4+– Nc5 (27...Bc2 28.Rc2 Rfb8 29.ed5+–) 28.ed5 Nb3 29.Qb2?? (better is 29.Qb4 Qb4 30.Nb4 Na1 31.Ra1+– (31.Nbd3?! Nd3 32.Nd3 Nb3+/–; 31.Nfd3?! Nb3 32.Rc2 Nd3 33.Nd3 c5+/–)) 29...Nc1+= 30.Qc1 g5? (better is 30...cd5 31.Nd5 Rfc8+=) 31.Nd3+– Nd3 32.Qf1 Ne5 (32...Nc5 33.Nd4 Qe5 34.Qc4+–) 33.Be4 (33.Nd4 Qd8 34.dc6 Kg7+–) 33...cd5 (33...f5!? 34.Bf5 Kg7+/–) 34.Qh3+– Kg7 35.Qh7 (35.Nd4 f5 36.Nf5 Rf5 37.Bf5 h6+–) 35...Kf6 36.Qf5 (better is 36.Nd4 Rh8 37.Rf1 Ke7 38.Qg7+–) 36...Ke7+/– 37.Qg5?? (better is 37.Bg2 g4 38.d4 Nf3 39.Bf3 gf3 40.e4+/–) 37...f6–/+ 38.Qf5 de4 39.Nd4 (better is 39.Qh7!? Kd8 40.Qe4–/+) 39...Qd5–+ 40.Qh7 Rf7 41.Nf5 (41.Qf5 Nf3 42.Kg2 Qf5 43.Nf5 Ke6–+) 41...Kd7 (41...Kd8 42.Qh8 Kc7 43.Qh3–+) 42.Qh5 (42.Qh3 Nf3 43.Kh1 Ng5–+) 42...Nf3 (42...Qd2 43.Rd1 Nf3 44.Qf3 ef3 45.Rd2 Ke6 46.Nd4 Kd5 47.Nb5 Kc5 48.Rd4+/–) 43.Kh1 Ke6 (43...Rb8 44.Rc1–+) 44.Rb1 Ra6 (44...Ra4 45.Rb6 Kd7 46.Rd6 Qd6 47.Qf7 Kc6 48.Nd6 Kd6 49.Qf6 Kc5 50.d4 ed3 51.Qf5 Kb6 52.Qf3 Ra1 53.Kg2 Ra2 54.Kf1 Rh2 55.Qf6 Kb7 56.Qf7 Kc6 57.Qc4 Kd7 58.Qd3 Ke7 59.g4 Rh1 60.Ke2 Rh2 61.Kf3+–) 45.Rb5 (45.Qh8 Qd2 46.Nd4 Nd4 47.Qc8 Kd6 48.Qa6 Nc6 49.Qc4–/+) 45...Qd2 (better is 45...Qc4 46.Ng7 A) 46...Rg7?! 47.Qf5 Ke7 48.Rb7 Kd6 49.Qf6 Kd5 50.Rb5 Qb5 51.Qf5 (worse is 51.ab5 Rf6 52.Kg2 Ne1 53.Kg1 Rgf7 54.h4 Rf2 55.Kh1 Nf3 56.d4 Rh2) 51...Ne5 52.ab5 Ra1 53.Kg2–/+; B) 46...Kd6 47.Nf5 Kc6–+) 46.Nd4!+– Nd4 Theme: Interference (46...Qd4 47.ed4) 47.Qd5 A double attack 47...Ke7 48.Rb7 0–1. Neffgen,D – Bitterling,E, 2004.

6.a4 Nd7 7.Qc2 Nc5 8.Bd4=.

6.Nc3 Nf6=.

4.c4

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

4.c4 Nd7 5.Nf3 Ngf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.Nf3 Nbd7).

4.c4 Be7 5.Nf3 f5 6.Be2 Nf6 7.0–0 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 0–0 7.0–0 Be6).

4.c4 f5 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Be6).

4.c4 f5 5.Be2 Nf6 6.Nf3 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 Be6).

4.c4 f5 5.Nf3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be6).

4.c4 f5 5.Nf3 Nf6 6.Be2 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 Be6).

4.c4 f5 5.Nf3 Nf6 6.Be2 Be7 7.0–0 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 0–0 7.0–0 Be6).

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

4.c4 Nf6 5.Nc3 Nbd7 6.Nf3 h6 7.d4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.Nf3 h6 6.d4 Nbd7 7.Nc3).

4.c4 Nf6 5.Nf3 Be7 6.Be2 h6 7.0–0 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 0–0 6.Be2 h6 7.0–0 Be6).

4.d3 Nd7

5.Nd2 f5 6.Ngf3= g6 (6...a5 7.b5=) 7.c4 Bg7 8.Qc2 Ngf6 (8...a5 9.b5=) 9.a3 (9.Be2 a5 10.b5 0–0=) 9...0–0 (9...Qe7 10.Be2=) 10.Ng5 Qe7 11.Ne6 (11.Be2 c6=) 11...Qe6 12.h3 (12.Be2 d5=) 12...c6 (12...Qe7 13.Be2=) 13.Be2 d5 (13...a5 14.0–0=) 14.0–0 g5 (14...Rad8 15.Nf3=) 15.e4 (15.d4 e4+=) 15...d4 (15...g4 16.hg4 fg4 17.ed5 cd5 18.Rac1=) 16.Qd1 (16.Nf3 h6=) 16...Rf7 (16...a5 17.ef5 Qf5 18.Re1=) 17.Bh5 (17.Nf3 h6= (17...fe4? 18.Ng5 Qe7 19.Nf7 Qf7 20.de4+–)) 17...Nh5 18.Qh5 h6 (18...g4 19.ef5 Qh6 20.Qh6 Bh6 21.Ne4 gh3 22.g4=) 19.Qe2 (19.ef5 Qf5 20.Ne4 Bf8=) 19...f4 (19...Nf6 20.ef5 Qf5 21.Rfe1=) 20.f3 (20.Qf3 Nf6=) 20...Bf6 (20...b6 21.a4=) 21.c5 Rg7 (21...b6 22.cb6 ab6 23.a4=) 22.Nc4 Be7 (22...b6 23.cb6 ab6 24.a4=) 23.Bc1 (23.Qd2 b6 24.cb6 ab6=) 23...Kh8 (23...b6 24.cb6 ab6 25.Bd2+=) 24.Bd2 Rag8 Black prepares the advance g4 (24...Kg8 25.a4=) 25.Ra2 (25.a4 Rf7=) 25...h5 Black prepares g4 (25...b6 26.cb6 ab6 27.Rfa1=) 26.Be1 (26.Qf2 g4 27.fg4 hg4–/+) 26...g4+= 27.fg4 hg4 28.hg4 Rg4 29.Qf3 Qh6 30.Nd6? (better is 30.Qd1+=) 30...Bd6–+ 31.cd6 Nf8?? (better is 31...Rg3 32.Bg3 fg3–+) 32.Rff2?? (32.Rc2!?–/+) 32...Nh7 (better is 32...Rg3 33.Kf1 Rf3 34.gf3 Qh1 35.Ke2 Rg1–+) 33.d7 (better is 33.Rfc2–+) 33...Rg3 34.Qd1 (34.d8N Rd8 (34...Rf3 35.Nf7 Kg7 36.Nh6 Rd3 37.Ng8 Kg8 38.Rfd2+–) 35.Qd1 Ng5–+) 34...Ng5 (34...Rh3! 35.Qh5 Qh5 36.Rf4 Rh1 37.Kf2 Rg2 38.Kg2 Qh2 39.Kf3 Ng5 40.Kg4 Qf4) 35.Kf1 (35.d8R Rd8 36.Rfc2–+) 35...Re3 (better is 35...Qh1 36.Ke2 Qh5 37.Kd2 Rd3 38.Kd3 Qd1 39.Rad2 Qe1–+) 36.Rfe2 (36.Kg1 Qh4 37.d8Q Re1 38.Rf1 Rd1 39.Qg8 Kg8 40.Rd1–+) 36...Qh1 37.Kf2 Nh3 0–1. Matt,J – Karadaghi,F, Stockholm, 1994.

5.Nd2 Ngf6 6.Ngf3 +=.

5.Nf3 d5 6.a3 a5 =.

5.Nf3 Ngf6 6.c4 Be7 7.Be2 b6 8.b5 a6 (8...0–0 9.Ng5 (9.0–0 a6 10.Ng5 Bf5 11.f4 ef4 12.Rf4=) 9...Bf5 10.0–0 a6 11.f4 ef4 12.Rf4=) 9.0–0 (9.Ng5 Bf5= 10.0–0 h6 11.e4 hg5 12.ef5=; 9.a4 ab5 10.ab5 0–0 11.0–0 Ra1 12.Ba1=; 9.Nc3 0–0 10.0–0 ab5 11.cb5 d5 12.Qc2=) 9...0–0 (9...ab5 10.cb5 Ra2 11.Ra2 Ba2 12.Nc3+=) 10.Ng5= h6 (10...Bf5 11.f4 A) 11...ab5 12.e4 (12.cb5 Nd5 13.Bc1 ef4–/+) 12...bc4 13.ef5+=; B) 11...ef4 12.Rf4=) 11.Ne6+= fe6 12.Nd2 (12.Bg4+=) 12...d5 13.ba6 Ra6 (13...Bd6 14.d4+=) 14.d4 (14.cd5 Nd5 15.d4+/–) 14...Ra8 (14...ed4 15.cd5 Ra7 16.de6 de3 17.fe3+=) 15.cd5 (15.de5 Nh7+/–) 15...ed5 (better is 15...ed4!? 16.de6 de3 17.fe3 Nc5+/–) 16.de5+– Ne4 (16...Ne8 17.e4 Ba3 18.Bc3+–) 17.Ne4 de4 18.Bc4 (18.Qd5 Kh8 19.Qe4 Nc5+–) 18...Kh8 19.Bd5 Ra5 20.Be4 Ne5 21.Qd8 (21.Bc3 Rc5 22.Qd8 Rd8+–) 21...Rd8 22.Bc3 Ra4 (22...Rc5 23.Bd4 Ra5 24.Rfc1+/–) 23.Be5 Re4 24.Bc7 Rc8 (24...Ra8 25.Bb6 Bf6 26.f3+–) 25.Bb6 Rec4? (25...Ra4 26.Bd4+–) 26.Bd4 (26.a4 Bf6 27.Ra2 Rc2+–) 26...Bd6 (26...Bf6 27.Rfd1+–) 27.Bb2 (27.a4 R8c6 28.a5 Ra6+–) 27...Rh4 (27...Ra4 28.a3+–) 28.g3 Rh5 (28...Ra4 29.Rfd1 Rc2 30.Bg7 (30.Rd6?! Rb2 31.a3 Rb3+–) 30...Kg7 31.Rd6 Raa2 32.Ra2 Ra2 33.Kg2+–) 29.Rfd1 Be7 (29...Be5 30.Rab1 Bf6 31.Bf6 gf6 32.Rd7+–) 30.Rd7 Bf8 31.Rc1 (31.Kg2 Rb5 32.Bd4 Ra5+–) 31...Ra8 (31...Rc1 32.Bc1 Ra5 33.Rd2+–) 32.a3! Rb8 (32...Ba3 33.Bg7) 33.Rb1 (33.Bd4 Ra5+–) 33...Rc8?? (better is 33...Rhb5 34.Bg7 Bg7 35.Rb5 Rb5+–) 34.Ra1 (34.Ra7 Rhc5+–) 34...Rc2 35.Bd4 Rf5 36.e4 Rf3 (36...Ra5 37.Rb1 Rc8 38.Rb3+–) 37.a4 Rd3 (37...Re2 38.a5 Re4+–) 38.Bg7! Bg7 39.Rd3 Ba1 40.f4 (40.Rd6 Ra2 41.Rh6 Kg7+–) 40...Ra2 41.Rd8 Kg7 42.Ra8 Bd4 43.Kf1 (43.Kh1!?+–) 43...Rh2 (43...Rf2 44.Ke1 Rh2 45.Kd1+=) 44.e5 (44.Rd8!? Bc5 45.Rd7 Kf6 46.Rc7+/–) 44...Rf2= 45.Ke1 Rg2 46.e6 (46.Rd8!? Bc3 47.Kf1 Rg3 48.Kf2=) 46...Rg3+= 47.f5 Kf6 (47...Re3 48.Kd2 Bc5 49.a5+=) 48.Rf8 Ke7 49.Rf7 Ke8 50.f6?? (50.Rh7 Rg5=) 50...Bc5?? (50...Re3 51.Kf1 Re6 52.Re7 Re7 53.fe7+=) 51.Rg7 (better is 51.Rc7 Re3 52.Kf2 Re6 53.Rc5 Rf6 54.Ke3+=) 51...Re3–/+ 52.Kf2? (52.Kd1 Re6 53.Rg6=) 52...Re6–+ (52...Re6 53.Kf3 Rf6 54.Ke2 Ra6–+) 0–1. Volkov,Mikhail – Svetkin,Mihail, RUS–ch U10 sf, 2000.

5.Nf3 h6 6.c4 a5 7.b5 Ngf6 8.Nc3 Be7 9.Be2 0–0 10.0–0 Nh7 11.Nd2 1–0. Fortuny Profitos,Jordi (1715) – Arno Bendicho,A (1915), 16th Balaguer Open, 2011.

4.d4 ed4

5.ed4 d5 6.a3 a5 7.b5 Bd6 8.Bd3 Nf6 9.Nf3=.

5.ed4 d5 6.a3 Bd6+=.

5.ed4 d5 6.b5 Nf6 7.Nd2 Be7 (7...Bb4 8.Bd3+=) 8.Be2 (8.Ngf3 a6+=) 8...Nbd7 (8...a6 9.Ngf3+=) 9.Nb3 (9.Ngf3 0–0=) 9...0–0 (9...Ne4 10.a3–/+) 10.Nf3 Ne4 11.0–0 Ndf6 (11...Re8 12.Bd3+=) 12.Nfd2 (12.Ne5 Bb4=) 12...c6 (12...Bb4 13.Ne4 Ne4 14.a3+=) 13.Ne4 Ne4 14.bc6 bc6 15.Bf3 (15.Bd3 Re8+=) 15...Ng5 (15...Re8 16.Re1+=) 16.Re1 Bd6 17.Bc1 (17.Rb1 Qf6 18.Be2 Qf4–/+) 17...Rb8+= 18.Bg4 Ne4 (18...Re8 19.Be3+=) 19.Be6 fe6 20.f3? (better is 20.Qg4!? Qf6 21.f3=) 20...Qh4–+ The mate threat is Bxh2 21.h3? (better is 21.f4–+) 21...Qf2 22.Kh1 Ng3 23.Kh2 Ne2 24.Kh1 Qg3 0–1. Ruhle,Ernst Albrecht – Bleisch,Beny, Bad Ragaz op, 1995.

5.ed4 d5 6.c3 Bd6 7.Bd3 Nf6 8.Nf3 a5 9.b5+=.

5.ed4 Nf6 6.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.d4 ed4 6.ed4).

5.Qd4 a6 6.b5 (6.Nf3 A) 6...Nf6 7.a3 (7.Qd1 d5 8.a3 Bd6 9.Bd3 Qe7 10.0–0 0–0; 7.Ng5 Nc6 8.Qf4 d5 9.a3 Bd6 10.Ne6 fe6) 7...Nc6 8.Qd1 Ra7 9.Bd3 Be7 10.0–0 0–0; B) 6...d5 7.a3 Nc6 8.Qd2 Nf6 9.Bd3 Bg4 10.Be2 Ne4; C) 6...Nc6 7.Qd2 Nf6= 8.Bd3 Bd5 9.a3 Bf3 10.gf3 Qe7; 6.Qd2 A) 6...d5 7.a3 Nf6 (7...a5 8.Nf3 ab4 9.ab4 Ra1 10.Ba1 Nf6) 8.Bd3 a5 9.b5 Bd6 10.Nf3 Ne4; B) 6...Nf6 7.Bd3 d5 8.a3 a5 9.b5 Bd6 10.Nf3 Ne4) 6...ab5+= 7.Bb5 c6 8.Bc4?? (better is 8.Bd3+= Qg5 9.Qe4 Nf6 10.Qf3 Bg4; 8.Be2 Ra2 9.Ra2 Ba2 10.Nc3 Be6) 8...Ra4–+ 9.Nd2 d5 (9...b5 10.Ne2 bc4 11.Nf4–+) 10.Rd1 (10.Ne2 dc4 11.Qd8 Kd8–+) 10...Nd7 (10...b5 11.Ngf3–+) 11.Ne2 b5 (better is 11...c5!? 12.Qf4 dc4 13.Nc3–+) 12.Nc3 Rc4 (12...Rb4 13.Ba3 c5 14.Qf4 bc4 15.Bb4 cb4 16.Nb5–+) 13.Nc4 bc4 14.Qa7 (14.0–0 Bd6–+) 14...Bc5 15.Qa6 Ne7 16.0–0 0–0 17.e4 (17.Ba3 Qa8 18.Qa8 Ra8 19.Bc5 Nc5–+) 17...Qc7 (17...Qa8 18.Qa8 Ra8 19.a3–+) 18.Ba3 Ba3 (18...Re8 19.ed5 cd5 20.Rfe1–+) 19.Qa3 Re8 (19...Nf6 20.ed5 cd5 21.Nb5–+) 20.Rfe1 Nf6 21.Qc5 (21.ed5 Ned5 22.Rd4 Qd7–+) 21...Qf4 (21...Ng4 22.g3 Qe5 23.ed5–+) 22.Qe3–/+ Qh4 23.Qg3 (23.a4 Ra8–+) 23...Qh6 (23...Qg3 24.hg3 Ra8 25.f3–+) 24.Rb1 (24.a4 Qh5–/+) 24...d4 25.Na4 (25.Ne2 Ne4 26.Qe5–/+) 25...g6 (25...Qd2 26.Nc5–+) 26.Rb8? (26.Rbd1 Nh5 27.Qa3 Nf4 28.Rd4 Qg5–/+) 26...Rb8 (better is 26...Qd2 27.Ra1 Qc2–+) 27.Qb8–/+ Qf8 (27...Kg7 28.Qb4 Qg5 29.Nc5–/+) 28.Qf8 (better is 28.Qe5!? Nd7 29.Qd4=) 28...Kf8–/+ 29.Nc5 (29.Rd1 Ne4 30.Rd4 Bd5–/+) 29...Nd7 30.Nd7 Bd7 31.Rb1 (31.a4!?–/+) 31...c5–+ 32.Rb8 (32.Kf1 Ba4 33.c3 f5 34.Rb8 Kg7 35.ef5 Nf5–+) 32...Bc8 (32...Kg7 33.Kf1 Ba4 34.c3–+) 33.a4 (33.Kf1 c3–/+) 33...Ke8 (33...d3 34.c3–/+) 34.Rb6 (34.Kf1 Kd7–/+) 34...Kd7 35.Rf6?? (better is 35.Kf1–+) 35...d3 36.cd3 c3 0–1. Fichte,Wolfgang – Lau,Wolfgang (2015), Sauerland Stern Hotel op 1st, 2001.

5.Qd4 Nc6 6.Qc3+= (6.Qd2 Nf6 7.Nf3 Ne4 8.Qd3 Nb4 9.Qe4+=) 6...Nf6 7.Bb5 Qd7 8.Nf3 a5 9.ba5=.

5.Qd4 Nf6 6.Nf3 (6.Bb5 Nc6 7.Nf3 a5 8.a3 ab4 9.ab4=) 6...a6 (6...Nc6 7.Bb5 a5 8.a3 Be7 9.0–0=) 7.a3 (7.Qh4 Nc6 8.Bf6 Qf6 9.Qf6=) 7...Nc6 8.Qd1 Be7 (8...Bg4 9.h3=) 9.Nbd2 (9.Bd3=) 9...0–0 10.Bd3 Qd7 11.c4 Rad8 12.Rc1 (12.Qc2 a5=) 12...Ne5 (12...d5 13.c5=) 13.Be5 de5 14.Ne5 Qc8 (14...Qd6 15.f4=) 15.Qc2 (15.0–0 Bd6 16.Ndf3 c5+=) 15...c5 16.b5 Qc7 17.Nef3 Qd6 (17...Qd7 18.Be2+=) 18.Be2 Ra8 19.a4 Bd8 (19...Rfd8 20.0–0+=) 20.0–0+/– Bc7 21.Ne4 (21.Rfd1 Rfd8+/–) 21...Qe7 (21...Ne4 22.Qe4 Qe7 23.Qc2+/–) 22.Ng3 (22.Nf6 Qf6 23.Bd3 Qh6+/–) 22...g6 (22...Bg4 23.Rfd1+=) 23.Rfd1+/– Bg3 24.hg3 (24.fg3?! Bf5 25.Bd3 Qe3 26.Kf1 Bh3=) 24...Bf5 25.Bd3 Bg4 26.Qc3 Rfe8 27.Qc2 ab5 (27...Rf8 28.a5 Qe6+/–) 28.ab5 b6 29.Ra1 Nd7 (29...Ra1 30.Ra1 Bf3 31.gf3+/–) 30.Be2 (30.Ra8 Ra8 31.Be4 Ra3+/–) 30...Nf6 31.Ra8 Ra8 32.Ne1 Be2 33.Qe2 Ne4 34.Qd3 Kg7 (34...Qe6 35.g4+=) 35.Qc2 Kh6 (35...Qe6 36.Nd3+/–) 36.Kf1 (36.Nd3!?+/–) 36...Ra3 37.Qb2 (37.Rd3 Ra1 38.Rd5 Kg7+=) 37...Ra7 (37...Ra4!?=) 38.Nf3 Qe6 39.Rc1 Qf5 (better is 39...Ra4 40.Qb3 Rb4+=) 40.Qe5 (40.Kg1!?+/–) 40...Qe5 (40...Ra2 41.Qf5 gf5 42.Ne5 Rf2 43.Kg1+=) 41.Ne5= Kg7 (41...f6 42.Nd3=) 42.Rc2+= Kf6 43.Nd3 Ra3? (43...Ra4 44.Ke2=) 44.Ke2?? (better is 44.Nf4!?+–) 44...Nd6 (44...Nc3 45.Kf3 Nb5 46.Rb2=) 45.f3 (45.Nf4 Ke5+=) 45...Ra4 (45...Nf5!?+=) 46.Nb2+/– Rb4 47.g4 g5 (47...h6 48.Kf2+/–) 48.Kf2 Ke6 49.g3 (49.e4 Nc8+/–) 49...f5 (49...Nc8!?+/–) 50.gf5+– Kf5 51.g4 Kf6 52.Rd2 (52.Ke2!?+/–) 52...Ke6+= 53.Rc2 h6 (53...Kf6 54.Ke2 Ke7+–) 54.f4+– gf4 55.ef4 Rb3 56.Re2 (56.Na4 Nc8+–) 56...Kf6 (56...Kf7 57.f5+/–) 57.Kg2 Rc3 58.Rd2 (better is 58.Na4!? Rc4 59.Nb6+–) 58...Ne4+= 59.Re2 Nd6 60.g5 (better is 60.Na4 Rc4 61.Nb6+–) 60...hg5= 61.fg5 (61.Na4 Rc4 62.Nb6 Rd4=) 61...Kg5 62.Re5 (62.Na4 Rc4 63.Nb6 Rb4 64.Re5 Kg4 65.Rc5 Rb2 66.Kf1 Kf3 67.Rc3 Kf4=) 62...Kf4 (62...Kf6 63.Rd5 Ke6 64.Na4 Rc4 65.Nb6 Nb5 66.Rh5 Rc2 67.Kf3–/+) 63.Rd5 (63.Re2!?+=) 63...Rc2–/+ 64.Kf1 (64.Kh3 Nb5 (64...Rb2?! 65.Rd6 Ke5 66.Rb6=; worse is 64...Nc4 65.Nc4 Rc4 66.Rd6+=) 65.Nd3 Ke4 66.Nc5 bc5 67.Rc5 Nd6–/+) 64...Ne4 (64...Nb5 65.Nd3 Ke4 66.Nc5 bc5 67.Rc5–+) 65.Nd3 (65.Na4!? Rc4 66.Nb6–/+) 65...Ke3–+ 66.Nc5? (better is 66.Ne1 Nd2 67.Kg2–+) 66...Nc5 67.Rd6 Na4 (67...Ne4 68.Rg6–+) 68.Rc6 Rc1 (68...Kd4 69.Ke1–+) 69.Kg2 Kd4 70.Rd6 Kc5 71.Rc6 Kb4 72.Kf2 Rc4 73.Rh6 Kb5 74.Ke2 Rd4 (74...Kb4 75.Kd2–+) 75.Ke3 Rd8 76.Rh4 Nc5 77.Ke2 (77.Rh6 Ka5–+) 77...Ka5 78.Rh5 Kb4 0–1. Larios,Francisco Javier (1970) – Argueso,Manuel (1915), Cto Autonomico Equipos, 2006.

5.Bd4 a6 =.

5.Bd4 Nc6 6.Bb5 Qg5 7.Bc6 bc6 =.

5.Bd4= Nc6 6.Bc3 (6.Bb5 a6 7.Bc6 bc6=) 6...Nf6+= 7.b5 (7.Bd3 Nd5 8.Bb5 a5+=) 7...Ne5 8.Nf3 Ng6 (8...Nfg4 9.Bd3=) 9.Nbd2 (9.Bd3 a6=) 9...d5 (9...Be7 10.Bd3=) 10.Bd4 Be7 (10...Bd6 11.Bd3=) 11.Bd3 0–0 (11...c5 12.bc6 bc6 13.0–0=) 12.0–0 Re8 13.Rb1 (13.c4 dc4 14.Nc4 a6 15.ba6 Ra6=) 13...c5 (13...Bd6 14.c4=) 14.bc6+= bc6 15.c4 (15.Rb7 Qa5=) 15...c5 16.Bb2 (16.Bc3 Rb8=) 16...Rb8 17.Ng5 Bg4 18.Qc2 (18.Qa4 Qd7 19.Qd7 Nd7=) 18...Nd7 (18...Bd6 19.cd5 Nd5 20.Nge4=) 19.h3 Bg5 20.hg4 dc4 (20...Nde5 21.Be5 Re5 22.Nf3 Rb1 23.Rb1+/–) 21.Nc4+= Qc7 (21...Bf6 22.Nd6 Re6 23.Bf6 Qf6 24.Ne4+/–) 22.Bc3 (22.Bf5 Nb6+=) 22...Bf6 23.Rb8 Rb8 24.Ba5 Qc6 25.Be4 (25.Rd1 Qe6=) 25...Qe6 26.Bc7 Rb4 27.Rc1 Bb2 (27...Qg4 28.Bf5 Qh5 29.Bd7+=) 28.Bf5 (worse is 28.Nb2 Re4 29.g5 Rg4=) 28...Qc6 29.Rd1 Ndf8 (29...Qc7 30.Rd7 (30.Nb2 Qe5 31.Nd3 Qf6 32.Nb4 cb4 33.Rd7 a6+–; 30.Bd7?! Be5=) 30...Qb8 31.a3 Rc4 32.Qc4+/–) 30.Ba5 (30.Bd6 Bf6+/–) 30...Ra4 (30...Rb5 31.Nd6 (31.Nb2?! Ra5 32.Nc4 Rb5+=) 31...Ra5 32.Qb2+=) 31.Be4 (31.Bd8 Be5+=) 31...Qb5 32.Bd3 (32.Nb2 Ra5 33.Nc4+/–) 32...Ra2+/– 33.Be1?? (33.Bc3 Bc3 34.Qa2 Qb7+/–) 33...Qb8?? (33...Ne6 34.Rb1+–) 34.Be2?? (better is 34.Rb1!? Ne5 35.Nb2 Nd3 36.Nd3 Rc2 37.Rb8+–) 34...Ne5 (better is 34...Ne6–/+) 35.Qb1+/– White launches an attack 35...Ra1 (better is 35...Nc4!? 36.Qa2 Na3+/–) 36.Qb2+– Qb2 37.Nb2 Rd1 38.Nd1 Nfd7 (38...c4 39.Nb2+–) 39.f4 (39.Bc3 c4+–) 39...Nc6 40.Bb5 Ncb8 (40...Ndb8 41.Bc3+–) 41.g5 (41.Bc3 a6 42.Bc4 Nb6+–) 41...a6 42.Be2 (42.Bd3 h6+–) 42...Kf8 43.e4 Ke8 (43...Nb6 44.Bf2 N6d7 45.Nc3+–) 44.Nc3 (44.Nc3 Kf8 45.Nd5+–) 1–0. Woelfelschneider,Peter – Zimmermann,Joerg, TT–04.13 TSC, 2003.

5.Bd4 Nf6 6.Qf3 Bd5 (better is 6...d5!? 7.Bf6 gf6=) 7.Bf6+= Qf6 8.Qf6 gf6 9.Nc3 Be6 10.Nge2 Bg7 11.Rd1 Nc6 12.Nd5 Bd5 13.Rd5 Nb4 14.Rb5 Nc2 15.Kd1 Na3 16.Rb7 Kd7 17.Rb3 Nc4 18.Nd4 Ne5 19.f4 Ng6 20.Bb5 Ke7 21.Bc6 Rab8?? (better is 21...Rac8 22.Nf5 Kf8+–) 22.Nf5 (22...Ke6 23.Ng7 Ke7 24.Nf5 Ke6 25.Nd4 Ke7 26.Kd2+–) 1–0. orane (1925) – coffeehouse, Live Game Caissa's Web, 2003.

4.d4 d5

5.a3 e4 6.Ne2 =+.

5.de5 Bb4 6.Nd2 Nc6 7.Ngf3 (7.a3 Be7 (7...Ba5 8.Ngf3 Qe7 9.Bb5 Bg4 10.h3 Bf3=) 8.Ngf3 Nh6 9.Bd3 0–0 10.Rb1 Re8=) 7...Nge7 (7...Nh6 8.Bd3 Be7 9.a3 0–0 10.0–0 Qd7=; 7...Qe7 8.a3 Ba5 9.Bb5 Bg4 10.h3 Bf3=; 7...Qd7 8.a3 Be7 9.Rb1 Nh6 10.Bd3 0–0=) 8.c3 (8.a3 Ba5 9.Bd3 Bg4 10.h3 Bd2=) 8...Ba5 (8...Bc5 9.Nb3 Bb6 10.Nbd4 Bg4=) 9.Bd3 Ng6 10.Qa4 (10.Bb5 Bb6=) 10...0–0 (10...a6=) 11.0–0 (11.Bb5 Nge7=) 11...a6 12.Rfd1 (12.Qc2 Qe7=) 12...b5 (12...Nge5 13.Bh7 Kh7 14.Ne5 Ne5 15.Qa5+=) 13.Qc2= Qd7 (13...Re8 14.Nb3=) 14.a4 b4 (14...Nce5 15.Ne5 Ne5 16.Bh7 Kh8 17.Ba3=) 15.Nb3 Bb6 (better is 15...bc3!? 16.Bc3 Nb4+=) 16.a5+/– Ba7 17.Ba6 Bf5 18.Bd3 (18.e4 Be4 19.Qe4 de4 20.Rd7 Nb8+/–) 18...Bd3+/– 19.Qd3 Nge5 (19...Nce5 20.Qd5 Qd5 21.Rd5+/–) 20.Ne5 (20.Qd5 Qd5 21.Rd5 Nf3 22.gf3 Rfd8 23.Rd8 Rd8+–) 20...Ne5+/– 21.Qd5 Qd5 22.Rd5 Nc4 23.Rb1 (23.cb4 Nb2 24.Rd2 Nc4+=) 23...Rfd8 24.Rd8 (24.Rd8 Rd8 25.h3+/–) 1–0. Gosme,Emile – Powell,Lisa, IECC, 1998.

5.de5 Bb4 6.Nd2 Ne7 7.Ngf3 Ng6 8.Bd3 (8.a3 Be7 9.Nd4 Bc8 10.Qh5 0–0 11.c4 Nd7) 8...0–0 (8...Nc6 9.0–0 0–0 10.a3 Be7 11.Qb1 Re8; 8...Nd7 9.Rb1 Qe7 10.0–0 0–0 11.Nb3 Rfe8; 8...Qe7 9.a3 Bc5 10.Nb3 Nd7 11.Bg6 fg6; 8...Bg4 9.e6 fe6 10.Bg7 Rg8 11.c3 Bd6) 9.0–0 (9.a3 Bd2 10.Qd2 Bg4 11.0–0–0 c6) 9...c5 (9...Nc6 10.a3 Be7 11.Bc3= (11.Qb1 Qd7) 11...Bc5) 10.c4 (10.Nb3 c4 11.a3 Be7 12.Bg6 fg6=) 10...dc4 (10...Nc6!?+= 11.cd5 Bd5) 11.Nc4+= b5 (11...Nh4 12.Nh4 Qh4 13.Nd6+=; 11...Nc6=) 12.Nd6 a6 13.Nd2 (better is 13.a3!? Ba5 14.a4+=) 13...c4= 14.Bg6 fg6 (worse is 14...Bd6 15.Be4 (15.ed6?! fg6 16.a4 Qd6=) 15...Bb4 16.Nc4 Bc4 17.Ba8 Bf1 18.Qf1+/–) 15.N2e4 Nc6 (15...Qh4 16.f4=) 16.a3 c3 (better is 16...Bd6!? 17.ed6 Rf5=) 17.Nc3+/– Bd6 18.ed6 Ne5 (18...Rc8 19.Ne4+/–) 19.Nd5 (19.Nb5 Nf3 20.gf3 ab5+/–) 19...Nc4 20.Nc7 Nb2 21.Ne6 (21.Qd4 Bc4 22.Na8 Bf1 23.Rf1 Nc4 24.Qd5 Rf7+/–) 21...Nd1+= 22.Nd8 Rad8 23.Rad1 Kf7 (23...Rf6!? 24.d7 Rf7+/–) 24.Rd5 Ke6 25.Rfd1 Rf5 26.R5d4 Kd7 (26...Rc5 27.Re4 Kf7 28.Kf1+/–) 27.e4 (27.Rc1 Ke6 28.Rc6 a5+–) 27...Rc5 28.Re1 (28.f4 Rdc8+–) 28...Re8 (better is 28...Ke6+=) 29.e5?? (better is 29.f4+/–) 29...Ree5 30.Red1 Rc2 (30...Re6 31.R4d3–/+) 31.g3 Ree2 32.Rf4 Rcd2 33.Rf7 Kd6 (33...Ke6 34.Rd2 Rd2 35.Rg7 Rd6 36.Rc7+=) 34.Rd2= Rd2 35.Rg7 (35.Ra7 Ke5=) 35...Ke5 (better is 35...Ra2–/+) 36.Ra7+= (worse is 36.Rh7 Rd3+=) 36...Rd6 37.Rh7 (better is 37.f4 Kf5 38.Kf2=) 37...Kf6 (37...Rd3!?+=) 38.Rh4 (38.Ra7!?+/–) 38...a5= 39.Rf4 Ke5 40.Rg4 Rb6 41.Kf1 (41.f4 Kf6 42.Rg5 b4 43.ab4 ab4+=) 41...b4+= 42.ab4 ab4 43.Rc4 b3 44.Rc1? (better is 44.f4 Kd5 45.Rc1–+) 44...b2–+ 45.Rb1 Kd4 46.h4 Kd3 47.g4 Kc2 48.Rb2 Rb2 0–1. Deb,Akash – Calonia,Roberto, California, 1998.

4.d4 f6

5.Nd2 ed4 6.Bd4 Nc6 7.Ngf3 Nd4 8.Nd4+= Bf7 9.Be2 Ne7+= 10.0–0 Ng6 11.Bf3 c6 12.Nc6+/– (12.Nc6 bc6 13.Bc6 Ke7 14.Ba8 Qa8 15.c4+/–) 1–0. makaveli1982 – sanu, internet, 2007.

5.d5 Bf7

6.Nc3 A) 6...Ne7 7.e4 (7.Nf3 Nd7 8.e4 c6 9.dc6 bc6 10.Qd6) 7...c6 8.Nf3 a5 9.a3 ab4 10.ab4; B) 6...c6 7.Nf3 Ne7 8.e4 a5 9.b5 cd5 10.Nd5; C) 6...Be7 7.Bd3 Nh6 8.e4 a5 9.b5 f5 10.ef5; D) 6...f5 7.Nf3 Nf6 8.Ng5 Bh5 9.Qd2 Qe7 10.Bd3.

6.c4 A) 6...c6 7.Nf3 (7.Nc3 f5 8.Nf3 Nf6 9.Be2 Be7 10.0–0) 7...f5 8.dc6 Nc6 9.a3 Nf6 10.Be2; B) 6...f5 7.Nf3 (7.Nc3 c6 8.Nf3 Nf6 9.Be2 Be7 10.0–0; 7.Be2 Nf6 8.Nf3 a5 9.a3 ab4 10.ab4; 7.Bd3 Qg5 8.Nf3 Qg4 9.Bf1 c6 10.dc6; 7.a3 Nf6 8.Nf3 a5 9.Be2 ab4 10.ab4) 7...c6 8.dc6 Nc6 9.a3 Nf6 10.Be2; C) 6...a5 7.b5 (7.a3 ab4 8.ab4 Ra1 9.Ba1 c6 10.Nf3) 7...Ne7 8.Nf3 c6 9.Nc3 cd5 10.cd5.

6.e4 c6 7.Nc3 (7.Nf3 Qb6 8.a3 a5 9.b5 cd5 10.ed5; 7.c4 Qb6 8.a3 a5 9.b5 Nd7 10.Nc3) 7...Ne7 8.Nf3 a5 9.b5 cd5 10.Nd5.

6.e4 Nd7 7.Nf3 (7.Nc3 a5 8.a3 Ne7 9.Nf3 c6 10.dc6) 7...a5 8.b5 Nb6 9.c4 f5 10.ef5.

6.e4 Be7 7.Nc3 (7.Nf3 Qd7 8.Nc3 f5 9.ef5 Qf5 10.Bc1) 7...c6 8.Nf3 Qb6 9.a3 Nh6 10.Bd3.

6.e4 Ne7 (DRAW agreed here) 7.Nc3 (7.Nf3 c6 8.Nc3 a5 9.b5 cd5 10.Nd5) 7...f5 8.ef5 c6 9.Bc4 Nf5 10.dc6 ½–½. Bui Dac Khuong – Nguyen Minh Hung, VIE–ch U15, 2005.

4.Nf3 a6

5.c4 Nc6 6.b5 Na5 7.Qa4 (7.ba6!? Ra6 8.c5=) 7...ab5–/+ 8.Qb5 Qd7 (8...c6!? 9.Qb4 e4–/+) 9.Qd7= Bd7 10.c5 (10.Nc3 Nf6=) 10...Be7 (10...Nc6 11.a3+=) 11.cd6= cd6 12.Nc3 Nf6 13.Be2 0–0 14.0–0 e4 15.Nd4 Rac8 16.d3 ed3 17.Bd3 Nc4 18.Bc4 Rc4 19.Rfd1 d5 20.Ndb5 Bb5 21.Nb5 Rb4 (21...Rc2 22.Be5 Ra8 23.a4=) 22.Bf6 Bf6 23.Rab1 Rb1 24.Rb1 Ra8 25.a3 h6 26.g3 Be7 Attacks the isolani on a3 (26...Ra5 27.Kg2=) 27.Nc7 Ra3 (better is 27...Ra7!?=) 28.Nd5+/– Bf8 29.Rb7 Ra5 30.Rd7 Bc5 31.Kg2 Ra7 32.Ra7 Ba7 33.Kf3 g5 34.Kg4 Kg7 35.Kh5 Bc5 36.Nc3 f5 37.Nd5 Bf8 38.g4 (38.h3!? Kf7+–) 38...fg4+/– 39.Kg4 Kg6 40.e4 h5 41.Kf3 Bd6 42.h3 Kf7 43.Ke2 Ke6 44.f3 Ke5 45.Kd3 Ke6 46.Ne3 Bf4 47.Kd4 Be5 48.Kc5 Bd6 49.Kc6 Bg3 50.Nf5 Be5 51.Kc5 Bb2 52.Nd4 Kf6 (better is 52...Ke5!? 53.Ne2 g4 54.fg4 hg4 55.hg4 Ke4=) 53.Kd5+– Kg6 54.e5 Bd4?? (better is 54...Kf7+–) 55.Kd4 Kf7 56.Kd5 Ke7 57.e6 h4 (57...Kf8 58.Kd6+–) 58.Ke5 1–0. Bruvoll,Philip J – Uyuducu,Dervis, Aslo ASKO CC–ch Group–C, 2006.

5.d4 e4 6.Nfd2 d5 7.c4 Bb4–/+ 8.cd5 Bd5 9.Be2 Nc6 10.0–0 Qh4 11.Re1 Bd6 12.h3 Nf6 13.Nf1 0–0 14.Nc3 Ne7 15.Nh2? Bh2–+ 16.Kh2 Qf2 17.Rf1 Qh4?? 18.Rf4 Qg5–+ 19.a4 Bc6 20.Qc2 Ng6 21.Rf2 Qe3 22.Nd1? Qg5–+ 23.Bc1 Qd5 24.Ne3 Qd4 25.Bb2 Qe3 26.Raf1 Rad8 27.Bc1 Qd4 28.Bd1 Qe5 29.Kh1 Qd5 30.Be2 e3! 31.Be3 Ne4 32.Rf5 Ng3 (32...Ng3 33.Kg1 Qg2) 0–1. gtate (1930) – stormer (1940), net–chess.com, 2004.

4.Nf3 Nc6

5.b5 Na5 6.Na3 c6 7.bc6 Nc6 8.Bb5 a6 9.Bc6 bc6 10.0–0 Be7 11.e4 Rb8 12.Bc3 Nf6 13.d3 d5 14.Be5 Rb7 15.Nd4?? Ba3–+ 16.Nc6 Qd7 17.Nd4 de4 18.de4 Ne4 19.Ne6? fe6 20.Qd7 Kd7 21.Bg7 Rg8 22.Bd4 Rc8 23.f3 Nd6 24.Rfd1 Bc5 25.Bc5 Rc5 26.Rd2 Rb2 27.Kf1 Rcc2 28.Rc2 Rc2 29.Kg1 Nf5 30.Kf1 Ne3 31.Ke1 Rg2 32.Rb1 Rg1 (33.Ke2 Rb1 34.Ke3 Ra1–+) 0–1. valpa – Holodoc, playchess.de, 2004.

5.b5 Nb4 6.a3 Nd5 7.Be2 Ngf6 8.0–0 Be7 9.c4 Nb6 10.Qc2 0–0 11.d4 e4 12.Ng5 Bf5 13.c5 Nbd5 14.a4 (14.Nd2 dc5 15.dc5 Nd7 16.Nge4 Nc5+=) 14...Qd7 (14...h6 15.Nh3–/+) 15.c6 (15.Nd2!? Nb4 16.Qb1=) 15...bc6+= 16.Qc6 (16.Nd2 Nb4 17.Qc4 d5+=) 16...Rab8 (16...Qc6!? 17.bc6 h6–/+) 17.Qd7 Nd7 18.Nh3 a6 (18...Bh3 19.gh3 c5 20.Nd2+=) 19.Ba3 ab5 20.ab5 N7b6 21.f3? (better is 21.Rc1+=) 21...Ne3–+ 22.Rc1 Rfc8 (22...ef3 23.Bf3 Nbc4 24.g4 Bb1 25.Rcb1–+) 23.Rc3? (23.fe4 Be4 24.Nf2 Bd5–+ (24...Bg2?! 25.Ng4 Bf6 26.Nf6 gf6 27.Kf2–/+)) 23...Ned5 (better is 23...Bf6!? 24.fe4 Be4 25.Re3 Bd4 26.Bc1–+) 24.Rb3 ef3 25.Bf3 (25.Rf3 Bf6 26.Bb2 Bg4–+) 25...Bf6 (25...Bc2!? 26.Nd2–+) 26.Bb2 Bc2 27.Rba3 Re8?? (better is 27...Nc4 28.Bd5 Nb2–+) 28.Nd2–/+ Ne3 29.Bc6 (29.Rc1 Bf5 30.Bc6 Re7–/+) 29...Re7 (29...Nd1 30.Be8 Re8 31.Ne4 Nb2 32.Nf6 gf6 33.Nf4–+) 30.Nf4 (30.Nf2 Bg6 31.Re1 Nec4 32.Re7 Be7 33.Nc4 Nc4–/+) 30...g5 (better is 30...Nd1!? 31.Nd5 Nd5–+) 31.Nh5–/+ Bh8 32.Ng3 (32.Re1 Nbd5 33.Rea1 Nb4–/+) 32...d5 (32...Nd1 33.Rc1 Nb2 34.Rc2 Bd4 35.Kf1 Re5–+) 33.Ra7? (33.Rc1 Bg6 34.Re1 Nf5 35.Re7 Ne7–/+) 33...Nf5?? (better is 33...Nd1 34.Rc1 Nb2 35.Rc2 Bd4 36.Kf1 Nd3–+) 34.Nf5+= Bf5 35.Nb3 Re2 36.Ba3? (better is 36.Bc3 Be4 37.R7a2 Ra2 38.Ra2+=) 36...Re3–+ 37.Nc5?? (37.Rf1 Be4 38.Nd2 Bd4 39.Kh1–+) 37...Bd4 38.Rd1 (38.Kf1 Ba1 39.Bb4–+) 38...Re1 0–1. Neumann,Frank (1650) – Ziegert,Andreas (2040), RSS5E NoEngine–72, 2009.

4.Nf3 Nd7

5.a3 Be7 6.Be2 Ngf6 7.0–0 0–0 8.Ng5 Nd5 9.Ne6 fe6 10.c4 N5f6 11.d4 e4 12.Nd2 Qe8 13.Qc2 Qg6 14.g3 c6 15.Ne4?? (15.f3 Qg5 16.Qc3 Nb6+=) 15...Ne4?? (better is 15...Qe4 16.Qe4 Ne4–+) 16.Bd3+= d5 17.cd5 (17.f3!?+=) 17...ed5 18.f3 Bg5 (18...Ndf6 19.fe4 Ne4 20.Be4 de4 21.Qb3 Kh8 22.d5=) 19.Bc1 (19.fe4!? Be3 20.Kg2+=) 19...Rae8 20.fe4 de4 (20...Rf1 21.Kf1 de4 22.Be2+=) 21.Bc4 Kh8 22.Bd2 Nb6 23.Be2 Nd5 24.Rf8 Rf8 25.Qe4?? (better is 25.Qc5 Rg8 26.Re1+=) 25...Qe4–+ 0–1. Fournier,Frederic – aschwanden (1625), rated blitz game, 2002.

5.a3 f5 6.d3 Be7 7.c4 b6 8.Nc3 c5 9.Be2 h6 10.Nd2 Ngf6 11.Nb5 (11.Bf3!? Rb8 12.Bh5 Kf8 13.Bf3+=) 11...0–0= 12.Bf3 ½–½. Swiatek,Agata – Bielawska,Magdalena, Poland–ch U12 Girls, 1998.

5.a3 Ngf6 6.c4 Nb6+= 7.Qc2 (7.d4 Nc4 8.Bc4 Bc4 9.de5 Ne4=) 7...g6 (7...e4 8.Nd4+=) 8.d4= ed4 (8...Bf5 9.Qd1=) 9.Nd4 Bd7 (9...Bg7 10.Ne6 fe6 11.c5 dc5 12.bc5+=) 10.Nd2 (10.Be2 Ba4 11.Qd3 d5 12.cd5 Nbd5+/–) 10...Bg7 (10...Na4 11.Bc1=) 11.g3 (11.c5 dc5 12.bc5 Ba4 13.Bb5 Bb5 14.cb6 c6 15.Nb5 cb5 16.ba7 Ra7+/–) 11...0–0 (11...c5 12.N4f3=) 12.Bg2 Rb8 (12...c5 13.N4b3 cb4 14.ab4+=) 13.0–0 (13.Rb1 c5 14.bc5 dc5=) 13...Re8 (13...Na4 14.Bc1=) 14.c5 (14.Rad1 Qe7+=) 14...dc5= 15.Qc5 (15.bc5 Na4=) 15...Na4 16.Qc2 Nb2 17.Qb2 Qe7 (17...c6 18.Rfd1=) 18.Rac1 (18.N2b3 c6=) 18...c6 19.N2b3 Ne4 (19...Rbd8 20.Nc5 Bc8 21.b5 cb5 22.Qb5=) 20.Be4 Qe4 21.Nc5 Qe7 22.Qd2 (22.Nd7 Qd7 23.b5 a6 24.bc6 bc6=) 22...Bh3+= 23.Rfe1 (23.Rfd1 Bg4 24.Re1 Rbd8+=) 23...Qd6 (23...Rbd8 24.f3+=) 24.f3 (24.Red1 Bg4 25.f3 Bh3=) 24...h5 (24...Qe7 25.Rcd1+=) 25.Ne4 (25.Red1 h4 26.Qf2 hg3 27.hg3 Qf6=) 25...Qe7 26.Rcd1 Rbd8 27.Qf2 (27.Qc2 h4=) 27...Be6 (27...Rd5 28.Nc3 Rd7 29.Ne4+=) 28.Nc5 Bc8 29.h4 (29.Kg2 Qf6=) 29...Bh6 Now all is on e3 (29...a5 30.Qc2+=) 30.Ne4 (30.e4 Bg7=) 30...Bg7 (30...f5 31.Ng5 Bg5 32.hg5 Qg5 33.Kh2–/+) 31.Ng5 (31.Nc5 Be5+=) 31...Bh6 (31...c5 32.bc5 Qc5 33.Ne4 Qa3 34.Ra1–/+) 32.Ne4 Bg7 (32...f5 33.Ng5 Bg5 34.hg5 Qg5 35.Kh2–/+) 33.Nb3 (33.Nc5!?=) 33...Be6 (33...Rd1 34.Rd1 Bf5 35.Nbd2+=) 34.Nbc5 Bc8 (34...Bd5 35.Nd2–/+) 35.Qa2 (35.Nb3 Bf5 36.Rd8 Rd8+=) 35...Rd1 (35...b6 36.Nd3–/+) 36.Rd1 Rd8 (36...b6!? 37.Nd3 Bg4–/+) 37.Rd8= Qd8 38.Ng5 (38.Qc2 b6 39.Nd3 Bf5+=) 38...Qe7 39.Kf2 (39.Qd2 Be5 40.Qf2 b6+=) 39...b6 40.Nd3 Bd7 (40...Bf5 41.e4 Bd7 42.Kg2+=) 41.Qc4 Bf6 (41...Bf5 42.e4 Bd7 43.e5+=) 42.Ne4 (42.Qf4 Bc8+=) 42...Bg7 (42...Bh8 43.Kg2+=) 43.Nf4 (43.Ng5 a5–/+) 43...Kf8 (43...Kh8 44.Ng5 Be8 45.Kg2+=) 44.Qa6 (44.Kg2 Be5=) 44...Bf5+= 45.Qc4 (45.Ng5 Qd7+=) 45...Be4–/+ 46.fe4 Qd7 47.Nd3 ½–½. Rohde,Angela – Seidel,Peggy, BL2 Mitte, 1993.

5.a3 Ngf6 6.c4 Be7 7.d3 h6 8.d4 ed4 (8...a5 9.Be2=) 9.Nd4 Bg4 10.Be2 Be2 11.Qe2 0–0 12.0–0 Re8 13.Nd2 Bf8 14.h3 a6 15.Qf3 Rb8 16.Nf5 Ne5 17.Qe2 Ng6 (17...g6 18.Be5 de5 19.Ng3=) 18.Rad1+= Nf4? (better is 18...Ne5!?+=) 19.Qf3+– Ng6 20.Nh6! gh6 Theme: Deflection from f6 21.Bf6 Eliminates the defender f6 21...Qd7 22.Bc3 Bg7 23.Bg7 Kg7 ½–½. Geragousian,Biaina – Broekmeulen,Joris, NED–ch U12 op, 2000.

5.a3 Ngf6 6.Be2 Nb6 =.

5.Nc3 Ngf6 6.d4 ed4 7.Qd4 Nb6 (7...a5!?=) 8.Bd3 g6? (better is 8...a5+/–) 9.Ne4+– Ne4 10.Qh8 (10.Qe4 d5 11.Qf4 Bd6+=; 10.Be4?! Rg8 11.Qc3 d5=) 10...d5 (10...Bd5 11.0–0 Qe7 12.Rfd1+–) 11.a3 (better is 11.0–0 Qd6 12.a3 0–0–0+–) 11...Qe7? (11...Nd7+–) 12.Be4 de4 13.Bf6 Qd6 14.Rd1 Qc6 (14...Nd5 15.Ng5 Bg4 16.Ne4+–) 15.Ng5 Nd7 16.Nh7 Qc2 (16...Bg4 17.Rd2 Qa6 18.c3+–) 17.0–0 Bb3 (17...c6+–) 18.Rc1 Qd2 19.Rc7 Qd6 20.Rfc1 Nf6 21.Nf6 (21.Qf8 Qf8 22.Nf6 Kd8 23.Rd7) 21...Kd8 (21...Qf6 22.Qf6 Rd8 23.Qe5 Be6 24.Qb5 Bd7 25.Rd7 Bc5 26.Rd8 Kd8 27.Qc5 Kd7 28.Qd5 Ke8 29.Rc7 g5 30.Qf7 Kd8 31.Qd7) 22.Rd7 (22.Qf8 Qf8 23.Rd7) 22...Qd7 23.Qf8 1–0. Rosner,Dirk (2175) – Juha,Michael (1820), RSS5E easy–31, 2007.

5.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Be6 4.e3 Nd7 5.Nf3).

5.d4 e4 6.Nfd2 (6.d5 Bg4 7.Qd4 f5=) 6...d5+= 7.c4 c6 (7...Bb4 8.Bc3 Bd6 9.Qb3+=) 8.Qb3 Ngf6 9.h3 g5 (9...Be7!?+=) 10.Nc3= Be7 11.a4 Rg8 12.Be2 Kf8 (12...dc4 13.Bc4 Bc4 14.Nc4=) 13.g4 ½–½. Nguyen Tran Quang,Minh – Tran Quoc Dung (2125), VIE–chT, 2003.

5.Be2 a5 =.

5.Be2 d5 6.d4?? (better is 6.Ne5 Qg5 7.Nf3+/–) 6...e4–/+ 7.Nfd2 Bb4 (7...Qg5 8.Bf1–/+) 8.0–0 (8.a3 Ba5–/+) 8...a6 (8...Qg5 9.f4 ef3 10.Rf3–/+) 9.c4 (9.Ne4 de4 10.d5 Bh3+=) 9...c6 (9...Qg5 10.Kh1–/+) 10.Qb3+= Bd2 (10...Be7 11.Nc3+=) 11.Nd2 b5 (11...b6 12.Ba3+=) 12.c5 (12.cb5 ab5 13.a4 ba4 14.Ra4 Ngf6=) 12...Nh6 (12...Ngf6 13.a4+=) 13.f3 ef3 14.Nf3 Nf6 (14...0–0 15.a4+=) 15.Ne5 (15.Bd3+=) 15...0–0 (15...Ne4!? 16.Nc6 Qc8–/+) 16.Nc6= Qc7 17.Ne5 Nhg4 (17...Ne4 18.Rfc1=) 18.Ng4 (18.Bg4!? Ng4 19.Ng4 Bg4 20.Qd5+/–) 18...Bg4+= 19.Rf6 (better is 19.Bg4!? Ng4 20.Rf4+=) 19...Be2+= 20.Rf5 (20.Rb6 Bc4 21.Qd1 Rfb8+=) 20...Bc4 21.Qc2 b4 (21...Rfe8 22.Qf2+=) 22.e4 Qc6 23.e5 (23.a3 Rae8 24.Re1 b3=) 23...f6+= 24.ef6 Rf6 25.Rf6 Qf6 (worse is 25...gf6 26.Qd2+=) 26.Re1 (26.Qf2 Re8 27.Qf6 gf6+=) 26...a5 (26...Rf8 27.h3 Ba2 28.Qd2–/+) 27.Qf2 (27.Ba1 Rf8 28.g3 Qc6–/+) 27...Qf2 (27...Ba2 28.Qf6 gf6 29.Re7–/+) 28.Kf2 Ba2 29.Re6 (better is 29.Re7–/+) 29...Rc8 (better is 29...a4 30.Rb6 a3 31.Rb4 ab2 32.Rb2 Bc4–+) 30.Ra6= Bc4 31.Ra5 Kf7 32.Ra7 Kf6 33.Rb7 (33.Bc1 h5=) 33...b3 34.Rb6 (34.Bc1 h5=) 34...Kf5+= 35.c6 (35.Kf3 h5+=) 35...Rc7 (35...Ke4 36.Kg3+=) 36.Ba3 (36.Kf3=) 36...Ke4 (36...Ke6!?=) 37.Bd6+= Rf7 (37...Rc8 38.c7 Kd3 39.Rb8 Rc7 40.Bc7+=) 38.Kg3+/– Kd4 (38...Kd3 39.Rb7 Rb7 40.cb7+/–) 39.c7 Rc7 40.Bc7 Kc3? (better is 40...Ke4!?+–) 41.Be5 d4 42.Bg7 (better is 42.Rd6 b2 43.Bd4 Kc2 44.Bb2 Kb2 45.Rd7+–) 42...Bd3? (42...Bd5 43.Kf4+–) 43.Bd4! Kd4 44.Rb3 h5 (44...Be4+–) 45.Rd3! Kd3 (45...Kc5 46.Kh4+–) 46.Kh4 1–0. Trkn – Ken Million, itsyourturn.com, 2000.

5.Be2 Be7 6.0–0 a6 (6...Ngf6 7.Ng5=) 7.c4 Bf6 (7...Ngf6 8.d4=) 8.d4+= e4 (8...Ne7!?+=) 9.Nfd2+/– d5 (9...Nb6 10.Qc2+/– (worse is 10.Ne4 Nc4 11.Bc3 Bd5+=)) 10.cd5+– Bd5 11.Nc3 c6 (11...Ne7 12.Nde4 0–0 13.Bd3+–) 12.Nde4 Qe7 (12...Nb6 13.Nd5 Nd5 14.a3+–) 13.Nf6 (13.Nd5!? cd5 14.Nc5 Nc5 15.bc5 Qe6+–) 13...Ngf6+/– 14.a3 0–0 15.Bf3 (15.Nd5 Nd5 16.Bd3 Rfe8+/–) 15...Rfe8 (15...Bf3 16.Qf3 Nb6 17.Rfc1+/–) 16.Re1 (16.Nd5 Nd5 17.Qb3 N7f6+/–) 16...Ne4 (16...Bf3 17.Qf3 Nb6 18.Rac1+/–) 17.Ne4 (17.Be4 Be4 18.Ne4 Qe4+/–) 17...Be4 18.Rc1 Nf6 19.Rc5 (19.Be4 Qe4 20.f3 Qh4+/–) 19...Nd5 20.Qe2 Rad8 21.Be4 Qe4 22.Qf3 Rd6 23.Qe4 Re4 24.Bc1 Rde6 25.Bd2 Re8 (25...Re7 26.f3 R4e6 27.e4+/–) 26.f3 Rh4? (better is 26...R4e6 27.e4 b6+–) 27.e4+– Nc7 (27...Nf6 28.Bg5 Rh5 29.g4+–) 28.g3 Rh6 (28...Rh3 29.Kg2 Rh6 30.Bh6 gh6 31.Rd1+–) 29.Bh6 gh6 30.Kf2 Ne6 (30...Nb5 31.d5 cd5 32.ed5+–) 31.Rc4 Nd8 (31...Rd8 32.Rd1+–) 32.f4 (32.d5 b5 33.Rcc1 cd5 34.ed5 Re1 35.Ke1 Kf8+–) 32...Ne6 (32...Kf8 33.d5+–) 33.h4 (33.d5 Nd8+–) 33...Nd8 (33...Rd8 34.f5 Ng7 35.g4+–) 34.Kf3 (34.d5 cd5 35.ed5 Kf8+–) 34...f5 35.e5 (35.g4 fe4 36.Re4 Re4 37.Ke4 Nf7+–) 35...h5 36.d5 Kg7 (36...cd5 37.Rd4+–) 37.dc6 (37.d6 Ne6+–) 37...Nc6 38.Rd1 Re7 39.Rc5 Nb8 40.Ke3 Nc6 41.Rcd5 (41.Rd6 Rc7+–) 41...Nb8 (41...Kf7 42.Rd7 Na7 43.Re7 Ke7 44.Rd6+–) 42.Rd8 Nc6 43.R8d7 Kf7 (43...Kf8 44.Re7 Ke7 45.Rd6+–) 44.Re7 Ke7 (44...Ne7 45.Rd7 b6 46.Kd4+–) 45.Rd6 Nd8 (45...Ke8 46.Rh6+–) 46.Rh6 Kf7 47.Rh5 Ke6 48.Rh7 Nc6 (48...a5 49.ba5 Nc6 50.Rh6 Kd7 51.Rc6 Kc6 52.h5+–) 49.Rb7 Kd5 (49...Ne5 50.Rb6 Ke7 51.fe5+–) 50.Kd3 a5 51.Rd7 Ke6 52.Rd6 Ke7 53.Rc6 Kd7 54.b5 a4 55.Kc4 Kd8 56.b6 Kd7 (56...Ke7 57.Rd6 Ke8 58.b7 Ke7 59.b8Q Kf7 60.Qc7 Ke8 61.Rd8) 57.Kc5 Ke7 58.Rd6 (58.b7 Kd7 59.b8Q Ke7 60.Qb7 Ke8 61.Rc8) 58...Kf7 (58...Ke8 59.b7 Ke7 60.b8Q Kf7 61.Qc7 Ke8 62.Rd8) 59.b7 Ke7 60.b8Q Kf7 61.Qc7 Kf8 (61...Ke8 62.Rd8) 62.Rd8 1–0. Ruhle,Ernst Albrecht – Furger,J, Wangs Pizol op, 1996.

5.Be2= Be7 6.0–0 Ngf6 7.Ng5 =.

5.Be2= Be7 6.d4 d5 7.a3 (7.de5 Bb4 8.c3 Bc5=) 7...e4+= 8.Nfd2 Ngf6 9.c4 b6 (9...dc4 10.Bc4 Bc4 11.Nc4=) 10.0–0 (10.cd5 Bd5 11.Nc3 c6+=) 10...0–0 (10...c6 11.Nc3=) 11.f4 (11.cd5 Bd5 12.Nc3 c6+=) 11...ef3 (11...dc4 12.Nc3=) 12.Bf3= c6 13.Qe2 (13.Nc3 dc4 14.Bc6 Ng4+=) 13...Qc7 (13...a5 14.cd5 Nd5 15.e4=) 14.c5 (14.e4 de4 15.Ne4 Rae8=) 14...b5 (14...Rfe8 15.Nc3+=) 15.Nc3 (15.a4 ba4 16.Nc3 Rfe8=) 15...Qc8 (15...a5 16.e4 de4 17.Nce4=) 16.Nb3 (16.a4 ba4 17.Ra4 Re8+=) 16...Nb8 (16...Re8 17.a4 a6 18.Qd3=) 17.a4+= a6 (17...ba4!? 18.Ra4 Re8+=) 18.ab5+/– cb5 19.Nb5 (better is 19.e4 de4 20.Be4+/–) 19...Bg4? (better is 19...Qb7!? 20.Nc3 Qb4+/–) 20.Nc3 White intends b5 (20.Bg4 Ng4 21.e4 Re8+–) 20...Bf3 21.Qf3 Qe6 (21...Nc6 22.Nd5 Nd5 23.Qd5 Nb4 24.Qf3+–) 22.b5 Ne4 (22...Re8 23.Rfb1+–) 23.Ne4 (23.Qf5!? Nc3 24.Qe6 fe6 25.Bc3 Bf6+–) 23...de4 24.Qd1 Bg5 25.Re1 f5 (25...Qd5!? 26.b6 Nc6+/–) 26.d5+– Qh6 27.Bc1 (27.Qe2 Rd8 28.d6 Qe6+–) 27...Nd7 (27...Bf6 28.Nd4+–) 28.Ra6 (28.c6 Bh4 29.Rf1 Nb6 30.Ra6 Ra6 31.ba6 Qd6+–) 28...Ne5?? (better is 28...Ra6 29.ba6 Qa6+–) 29.Rh6 (29.Rh6 Bh6 30.Qc2+–) 1–0. Horch,J – Malisius, Magdeburg GER, 1995.

5.Be2= Be7 6.d4 Ngf6 7.de5 de5 8.a3 =.

5.Be2= Qf6 6.c4 =.

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

5.Be2 Ngf6 6.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.Nf3 Nbd7 6.Be2).

5.Be2 g6 6.0–0 Bg7 7.c4 h6 (7...a5 8.a3=) 8.d4+= e4 (8...a5 9.a3+=) 9.Nfd2 White gets strong initiative 9...f5 10.f3 (10.Nc3 c6+=) 10...Qg5 (10...ef3 11.Bf3 c6 12.Nc3+=) 11.Qb3 Ngf6 (11...ef3 12.Bf3 Ngf6 13.Bb7 Rb8+/–) 12.d5+/– Bf7 (12...Bg8 13.fe4 Ne5 14.Be5 de5 15.Nf3+/–) 13.fe4 Rg8 14.Nf3 Qh5 15.Nd4 Qg5 16.ef5 gf5 17.Rf5 Qh4 18.Rf4 Qe1 19.Rf1 Qh4 20.Nf5 Qg5 21.Nd2 Bf8 (21...Bh8 22.Rf2+–) 22.Rf2 0–0–0 (22...Ng4 23.Bg4 Qg4 24.e4+–) 23.Ng3 (23.Bd4 Kb8+–) 23...Re8 24.Rf5 (24.Bd4 Kb8+–) 24...Re3 (24...Qg6 25.Bd4 h5 26.Raf1+– (26.Ba7?! h4 27.Rf3 Ne5+=)) 25.Rg5 Rb3 26.ab3 hg5 27.Ra7 Kb8 28.Ra1 (28.Bd4 Bg7 29.Ra2 Bg6+–) 28...Bg6 29.Rf1 Bg7 30.Nf5 Bh8 (30...Bf5 31.Rf5 Nh7 32.Bg7 Rg7 33.Kf2+–) 31.Ne7 Rg7 32.Ng6 Rg6 33.Bd3 (33.Rf5 g4+–) 33...Rg8 34.Bf5 Ne5 35.Be6 Rg6 (35...Re8 36.Rf5+–) 36.Be5 de5 37.Nf3 Nh5 38.Bf7 Rh6 39.Bh5 Rh5 40.Ng5! (40.Ng5 Rg5 41.Rf8 Ka7 42.Rh8+–) 1–0. Doncea,Vladimir (2105) – Raut,Cristian (2230), Eforie Nord op, 2002.

4.Nf3 e4

5.Nd4 Qd7 6.Ne6 Qe6 7.c4 (7.Nc3 d5=) 7...Nd7 (7...Nc6 8.Nc3=) 8.Nc3+= c6 9.Qc2 (9.d3 ed3 10.Bd3 Ne5+=) 9...Ngf6= 10.d3 ed3 11.Bd3 g6 (11...Ne5!?=) 12.0–0 Bg7 13.Ne2 0–0 14.Rfd1 Rad8 (14...Ne5 15.Nd4 Qe7 16.Be2+=) 15.b5 (15.Nd4 Qe7+=) 15...Ne5+= 16.bc6 (16.Nd4 Qe7+=) 16...bc6 17.Nf4 (17.Rab1 Rfe8+=) 17...Qc8 (17...Qe7 18.Rab1+=) 18.Bf1 (18.Rab1 Nd3 19.Qd3 Rfe8+=) 18...Rfe8 19.Bd4 c5 (19...Qc7 20.Rab1+=) 20.Bc3 g5 (20...Qc6 21.Nd5+=) 21.Nd5+/– Nd5 22.Rd5 Re6 (22...Qe6 23.Rad1+/–) 23.Rad1 Rh6 (23...Qc7 24.Bd3 Nd3 25.Qd3 Bc3 26.Qc3+/–) 24.Ba1 (better is 24.e4+/–) 24...Qg4?? (better is 24...Qc7+/–) 25.Be5+– Be5 26.Re5! Qh4 Threatening mate... how? (26...de5 A pinning theme 27.Rd8) 27.h3 (27.h3 g4 28.Re4+–) 1–0. Hofmann,Bernhard (2095) – Feiersinger,Gerhard (1690), Wattens op, 1997.

5.Nd4 Bd7 6.d3 d5 7.a3 =.

5.Nd4 Nf6 6.f3 d5 7.fe4 Ne4 8.Ne6 fe6 9.Qh5 Kd7 10.c4 c6 11.cd5 cd5 12.Nc3 Ng5 (12...Nf6 13.Qg5 Nc6+= (13...Bb4? 14.Qg7 Be7 15.Nd5 ed5 16.Bf6+–)) 13.h4+– Nf7?? (13...Ne4 14.Ne4 de4 15.Qb5 Kc7 16.Qc4 Kd7 17.Qe4 Nc6+–) 14.Bb5 Ke7 (14...Nc6 15.Qf7 Qe7+–) 15.0–0 Nd6 (15...g6 16.Qf3 Nc6 17.Qf7 Kd6 18.Qb7 Qc8 19.Bc6 Qb7 20.Bb7 Rb8 21.Nb5 Kd7 22.Rf7 Be7 23.Bh8 Rb7+–) 16.Qg5 1–0. aspasio – gsmelt (2310), net–chess.com, 2014.

4.Nf3 Be7

5.a3 f5 6.c4 Nf6 7.Be2 0–0 8.0–0 h6 9.d3 c6 10.Nbd2 Nbd7 11.Rc1 a5 12.b5 c5 13.a4 Nb6 14.Ra1 Nfd7 15.Qc2 Bf6 16.Nb3 e4 17.de4 Bb2 18.Qb2 fe4 19.Nfd2 Ne5 The pressure on c4 grows (19...d5 20.cd5 Bd5 21.Qc3=) 20.Qc2 Nd3? (better is 20...Qe7!?=) 21.Bd3+/– ed3 22.Qd3 d5 (22...Qe7!?+/–) 23.cd5+– Bd5 24.Nc5 Qg5 25.f3 (25.e4!? Rac8 26.Qd4 Qe7+–) 25...Rad8 26.Qc2 (26.Qa3 Nc4 27.Nc4 Bc4 28.Nb7 Bf1 29.Qa2 Rd5+/–) 26...Bc4 (26...Rc8 27.Ndb3+=) 27.Nce4 (27.Nb7 Bf1 28.Nf1 Rc8 29.Qb3 Kh8 30.Na5 Rf3+–) 27...Qe3+= 28.Kh1?? (better is 28.Rf2 Be6 29.Qc5+/–) 28...Bf1–/+ 29.Rf1 Nd5 (29...Qd4 30.Qa2 Rd5 31.h4–+) 30.Qa2 (30.Nc4 Qf4=) 30...Kh8 31.Rg1 Nf4 (better is 31...Nb4!? 32.Qb3 Nd3–/+) 32.Nc4+= Qd4 33.Qc2?? (33.Na5 Qb6 34.Nc4 Qe6=) 33...Rd5?? (better is 33...Rc8 34.Ned2 Nd3–+) 34.Nb2 (34.Na5 Qb6 35.Nc4 Qd4=) 34...Rh5 (34...Qb4 35.Rb1–/+) 35.h3 Qe5 36.Qf2?? (better is 36.Rc1–/+) 36...Nh3!–+ 37.gh3 (37.gh3 Qf5 Double attack (37...Qf5 Decoy)) 37...Rh3 38.Kg2 Rh2 39.Kf1 Rf2 (39...Rf2 40.Nf2 Qb2–+) 0–1. Fournier,Frederic (1835) – ubosatla (1930), Active, 2005.

5.Nc3 Nf6 =.

5.c4 Nd7 6.Be2 Bf6 (6...a5 7.b5=) 7.d4 (7.Nc3 Ne7+=) 7...ed4 8.Bd4 (8.Nd4 c5 9.bc5 Nc5+=) 8...Bd4 9.Nd4 Ngf6 10.0–0 0–0 11.Nd2 a5 12.b5 (12.f4 Qe7 13.e4 g6=) 12...Nc5 13.a4 Kh8 (13...Qe7 14.Qc2=) 14.Bf3 d5 (14...Qe7!?=) 15.Qc2+= Qe7 (15...Bg4 16.Rfd1 Bf3 17.N2f3+/– (worse is 17.gf3 Re8+=)) 16.cd5+/– Bd5? (better is 16...Nd5!? 17.Rfc1 b6+/–) 17.Nf5+– Qd7 18.Qc5 Bf3?? (better is 18...Qf5 19.e4 Qf4 (worse is 19...Ne4 20.Qc2+–) 20.ed5 Qd2 21.Qc7 Nd5 22.Qb7 Nc3+–) 19.Nf3 (19.gf3?! Qd2 20.Rfd1 Qb2 21.Qc7 Nd5 22.Qb7 Rad8+–) 19...b6 (19...Qd5 20.Qc2+–) 20.Qc2 g6 21.N5d4 Rac8 (21...Rfe8 22.Rfc1 Kg8 23.Qc7 Qc7 24.Rc7+–) 22.Rfc1 Nd5 23.Qb2 (23.Rd1 Qe7+–) 23...Kg8 24.Nc6 f6 (24...Rfe8+–) 25.Rd1 Qf7 (25...Rce8 26.Qb3+–) 26.Rd5! 1–0. Cerny,Lumir (1685) – Cerv,Jiri, Open Teplice, 2008.

5.c4 f5 6.d4+= e4 7.Nfd2 (7.d5 Bf6 8.Bf6 Qf6+=) 7...d5= 8.a3 c6 9.Nc3 Nf6 10.Be2 0–0 11.0–0 Bd6 12.cd5 cd5 13.Nb5 Be7 14.Rc1 Nc6 15.Nb3 a6 16.Nc3 Bd6 17.Nc5 Qe7 18.Qd2 ½–½. Karali,A – Stadler, Athens, 1984.

5.c4 Bf6 6.e4 Nd7 7.Nc3 Ne7 8.Nd5 Nd5 9.ed5 Bg4 10.Qc2 Bf3 11.gf3 Qe7 12.Qe4 Bg5 13.h4 Bf4 14.Bd3 Nf6 15.Qe2 Nh5 16.0–0–0 Bh6 17.Kb1 Nf4 18.Qf1 Nd3 19.Qd3 Qf6 20.Qe4 Qf4 (better is 20...Bf4!?+=) 21.d4+= Qe4 22.fe4 f6 23.Kc2 0–0 24.Rh3 Bf4 25.Bc1 (25.c5!?+=) 25...Bc1= 26.Kc1 Rf7 27.Rf3 Raf8 28.Kd2 ed4 29.Ke2 f5 30.Rf5 Rf5 31.ef5 Rf5 32.Rd4 Kf7 33.f3 Kf6 34.a4 g5 35.hg5 Rg5 36.Kf2 h5 37.a5 Rg7 38.Rf4 Ke5 39.Rh4 Rh7 40.Ke3 Kf5 41.Rf4 (better is 41.f4+=) 41...Ke5?? (better is 41...Kg6=) 42.Rf8 h4 (42...Rf7 43.Rf7 h4 44.f4) 43.f4 1–0. Fischbach,Rainer (1870) – Nittschalk,Karl, Leipzig VfB op, 2009.

5.c4 Nf6 6.Nc3 =.

5.d3 Nf6 6.Be2 Qd7 (6...0–0 7.0–0=) 7.0–0 (7.Ng5 0–0=) 7...Nc6 (7...a5 8.ba5 Ra5 9.c4=) 8.b5 Nd8 9.c4 0–0 10.Nc3 d5 (better is 10...a6!?=) 11.Ne5+/– Qd6 12.d4 dc4 13.Bc4 (13.Nc4 Qd7+/–) 13...Bc4 (13...Re8 14.Bd3+/–) 14.Nc4 Qe6 15.d5 Qf5 16.Rc1 (16.Qd4 Re8+/–) 16...b6 (better is 16...Bb4+/–) 17.e4! Qg5 (17...Ne4 18.Qf3 Double attack (18.Qf3 Decoy)) 18.f4 (18.Qf3 Bc5+–) 18...Qh4 19.Ne3 (19.Qe1 Qh5+–) 19...Bc5 20.Qe1 Ng4?? (better is 20...Qe1 21.Rfe1 Ng4+/–) 21.Qh4 (21.Qh4 Ne3 22.Rf2+–) 1–0. Wall,Bill – Sagebrushlady, chess.com, 2008.

5.d4 d5 6.Ne5 Bb4 7.Bc3 Bd6 =.

5.d4 e4 6.Nfd2 d5 7.a3 Nf6 8.c4 c6 9.Nc3 0–0=.

5.d4 e4 6.Nfd2 d5 7.a3 f5 8.c4 c6 9.Nc3 Nf6 10.Na4 Nbd7 11.Nc5 Nc5 12.dc5 0–0 13.Be2 Qe8 14.0–0 Qg6 15.Kh1 Rad8 16.Qc2 Ng4 17.cd5 cd5 18.Bd4 Bf6 19.Qc3 (19.Bf6 Rf6 20.h3 d4 21.ed4 Nh6+=) 19...Qh5 (19...f4!?+=) 20.h3= Qh4 21.Kg1 Nh6 22.f4 Qg3 23.Rac1 Bh4 24.b5 Rf6 (24...Rc8 25.c6+=) 25.Bh5 Nf7 26.Bf6 Bf6 27.Qb3 g5 (27...g6 28.Be2 d4 29.Qe6 Qe3 30.Kh1 Qe2 31.c6 (31.Qf6?! Qd2 32.c6 bc6+/–) 31...bc6 32.bc6 Qd2 33.c7+/–) 28.Rf2 (28.c6 gf4 29.ef4 Qb3 30.Nb3 bc6 31.Rc6 Nd6+–) 28...gf4+= 29.Nf1 Qg7 Black plans d4 30.Rf4 Ng5 31.Kh1 d4 32.Qa4 d3? (32...Qh6 33.Rh4 (worse is 33.Qa7 Qh5 34.Qb7 Nh3 35.gh3 Qh3 36.Nh2 Qe3+=) 33...Kf8 34.Qa7=) 33.Nd2 (better is 33.Qa7 Bb2 34.Rb1+–) 33...Qh6= 34.Qd1 (worse is 34.Qa7 Qh5 35.Rf2 Qh4–/+) 34...Bc8?? (better is 34...Bb2 35.Rb1 Ba3=). Rankis,August – Peckar,Mark, Marshall CC–ch, 1956.

5.d4 e4 6.Nfd2 d5 7.a3 f5 8.c4 c6 9.Nc3 Nf6 10.Be2 0–0 11.Qb3 Nbd7 12.0–0 Qe8 13.c5 Qg6 14.f4 (14.b5!?=) 14...Ng4+= 15.Nd1 (15.Na2 Qh6 16.h3 Bh4–/+) 15...Bh4–/+ 16.g3? (better is 16.Bg4 Qg4 17.Nc3–/+) 16...Nh2!–+ 17.Kh2 (17.Rf2 Nf3! 18.Nf3 ef3 19.Bf3 Qg3 20.Bg2–+) 17...Qg3 18.Kh1 Qh3 19.Kg1 Rf6 20.Bh5 Bg3 21.Rf2 Bf2 22.Nf2 Qh5 23.Kf1 Rg6 24.Ke1 (24.b5 Nc5! 25.dc5 d4 26.Qe6 Re6 27.Bd4 cb5–+) 24...Nf6 25.Nf1 Ng4 (better is 25...Qh4 26.Qc2–+) 26.Ng4 Rg4 (better is 26...fg4 27.Kd2 g3 28.Ng3 Rg3 29.Re1–+) 27.Kd2 (27.Qd1–+) 27...Rg2 28.Kc3 (28.Kc1 Qe2 29.Kb1 Qf1 30.Ka2 Qe2–+) 28...Qe2 29.Rd1 Bf7 30.b5 (30.Bc1 Bh5 31.Rd2 Qf1 32.Qc2–+) 30...Bh5 31.Rc1 Qd3 32.Kb4 Qb5 33.Kc3 Qb3 (33...Qd3 34.Kb4 Rb2 35.Qb2 a5 36.Ka4 Bd1 37.Rd1 Qc4 38.Qb4 ab4) 34.Kb3–+ Rf8 35.Bc3 (35.Kc3 Bf3–+) 35...Be2 36.Ka4 (36.Nd2 Kf7–+) 36...h5 (36...Rg1 37.Rb1 Bb5 38.Kb3 Bf1 39.Kb2–+) 37.Rb1 (37.Nd2 Rg3–+) 37...Bb5 38.Ka5 Rf6 39.a4 (39.Be1 Bf1 40.Bh4 Bd3 41.Rb7 Rf7 42.Rb8 Kh7–+) 39...Ba6 40.Nd2 (40.Be1 Rg1 41.Nd2 Bd3–+) 40...h4 41.Rh1 Rh6 42.Nf1 Bf1 43.Rf1 h3 0–1. Jaramillo,Carlos Orlando (1940) – Botello,Gregory Paul (1615), 1a Eliminatoria Nacional de Ma, 2009.

5.d4 e4 6.Nfd2 d5 7.a3 Nf6 8.c4 c6 9.cd5 Bd5 (9...cd5 10.Be2+=) 10.Nc3= 0–0 11.Be2 Qd6 (11...a5 12.b5=) 12.Qc2 Increases the pressure on e4 12...Qe6 13.0–0 Nbd7 (13...a5 14.ba5 Ra5 15.Rfc1=) 14.Rac1 (14.Rfc1 Nb6=) 14...Nb6 15.Kh1 (15.Nd5 Nbd5 16.Rfd1 Rfd8=) 15...Bd6 (15...Rfc8 16.Nd5 cd5 17.Qb3=) 16.Rfe1 (16.Nd5 Nbd5 17.Nc4 Bc7=) 16...Qf5 (16...Rfe8 17.Nd5 cd5 18.Kg1=) 17.Bf3 Now all is on e4 (better is 17.Kg1=) 17...Ng4?? (better is 17...Rfe8+=) 18.Bg4 (18.Nde4!? Bb8 19.Nd5 cd5+–) 18...Qg4+/– 19.h3 (19.Nde4 Rfe8 20.Nd5 Qe4 21.Qe4 Re4 22.Nb6 ab6+/–) 19...Qg6 (19...Qh4!?=) 20.Nde4+= (worse is 20.Nce4 f5 21.Ng3 Bg3 22.fg3 Qg3–/+) 20...f5 21.Nd5 fe4 22.Nc3 (22.Nb6 ab6 23.Rf1 b5+=) 22...Rae8 23.Rg1 (23.b5 Nd5+=) 23...Nc4 (23...Bb8 24.Qb3 Kh8 25.Rc2=) 24.Ne4 (better is 24.Qe2 b5 25.d5=) 24...Nb2? (better is 24...Ne3 25.Qb3 Nd5=) 25.Nd6+– Nd3? (better is 25...Qd6 26.Qb2 Qf6 27.Qb3 Kh8+–) 26.Ne8 Nf2 27.Kh2 Qe8 28.Qb3 (better is 28.Rgf1 Qe3 29.Qa2 Kh8 30.Rce1 Qf4 31.Kg1 Nh3 32.gh3 Qd4 33.Kg2+–) 28...Kh8 29.Rgf1 (better is 29.Rc5 Ne4 30.Rc2 Qb8 31.g3+/–) 29...Qb8= 30.g3 (better is 30.Kg1!? Nh3 31.Kh1 Nf2 32.Rf2 Rf2 33.Qe6=) 30...Rf3–/+ 31.Rg1 Ne4?? (better is 31...Qc8 32.Kg2 Ne4 33.Kf3 Nd2 34.Ke2 Nb3–/+) 32.h4?? (better is 32.Qe6 Re3 33.Qe5 Qe5 34.de5+–) 32...Rg3 0–1. mtr – vintik, internet, 2001.

5.d4 e4 6.d5 Bg4 (worse is 6...ef3 7.de6 fg2 8.Bg2+–) 7.Qd4 f5 8.Bb5 c6 9.Qg7 Bf6 10.Bf6 Qf6 11.Qb7 Qa1+=.

5.Be2 a6 6.0–0 b5 (6...Nf6 7.a3=) 7.a4 White gets strong initiative 7...c6 (7...ba4!? 8.Nc3 Nf6+=) 8.ab5+/– Qb6 9.d4 f6 (9...e4!? 10.d5 Bd5+/–) 10.Nc3+– (10.de5?! de5 11.ba6 Bb4+/–) 10...cb5 11.Bb5! Bd7 (11...ab5 12.Ra8) 12.Nd5 Qb7 13.Bc4 Bc6? (13...e4 14.Nd2 f5+–) 14.de5 (14.Ne7?! Ne7 15.de5 de5+/–) 14...de5 15.Ne5! (15.Ne7?! Ne7 16.Bc3 Bd5+/–) 15...fe5 16.Be5 Bd5 (16...Kf8 17.Ne7 Ne7 18.Qd8 Be8 19.Bg7 Kg7 20.Qd4 Kg6 21.Qd6 Kg7 22.Qe5 Kg6+–) 17.Bd5 Nc6 18.Bg7 0–0–0 (18...Nf6 19.Bh8 Nd5 20.Qd5 Bb4 21.Rfb1+–) 19.Bh8 Bf6 (19...Nf6 20.Bf6 Bf6 21.Ra2+–) 20.Bf6 (20.Qg4!? Kc7 21.Qg3 Kb6 22.Bc6 Qc6+–) 20...Nf6 21.Be6 Kb8 22.Qf3 (22.Qf3 Ne8 23.Bd5+–) 1–0. Woelfelschneider,Peter – Oeltze, 2009.

5.Be2 c5 6.a3 (6.bc5 Nc6+/–) 6...b6 (6...Qb6 7.Nc3=) 7.d3 (7.d4 ed4 8.ed4 Nf6+=) 7...cb4 (7...Nd7 8.0–0=) 8.ab4+= a5 (8...Nf6 9.Ng5+=) 9.0–0 (9.d4 e4 10.d5 Bd7+/–) 9...Nf6 10.Ng5 Nd5 (better is 10...Bd7!?+=) 11.Ne6+/– fe6 12.Bf3 (better is 12.Bh5 g6 13.Bf3+/–) 12...g5?? (better is 12...Ra7 13.Bd5 ed5+/–) 13.c4+– Nf6 (13...Nc7 14.Ba8 Na8+–) 14.Ba8 d5 (14...ab4 15.Qa4 Nbd7 16.Qb4+–) 15.cd5 (15.ba5 ba5 16.cd5 ed5+–) 15...ed5 (15...Bb4 16.de6 Qd6 17.f4 Qe6 18.fe5+–) 16.ba5 ba5 (16...Nbd7 17.Bc6 ba5 18.Bd7 Kd7 19.Be5+–) 17.Be5 Na6 (17...Nbd7 18.Bf6 Nf6 19.Qa4 Kf7 20.Qa5 Qa5 21.Ra5+–) 18.Bf6 (better is 18.Qa4!? Kf7 19.Qb5 Nb4 20.Ra5 Qe8+–) 18...Bf6 19.Qa4 Kf7 20.Ra2 (20.d4 Qa8 21.Qa5 Rc8 22.Qa6 Qa6 23.Ra6 h5+–) 20...Qa8 (20...Kg7 21.Bc6 Nb4 22.Ra3+–) 21.Qa5 Qc6 (21...Rc8 22.Qa6 Qa6 23.Ra6+–) 22.Qa6 Qc8 (22...Qa6 23.Ra6 Rc8 24.Rd6+–) 23.Nd2 (23.Qb5 Rd8+–) 23...Qd7 (23...Qa6 24.Ra6 Rc8 25.Rb1+–) 24.Rb1 Rc8 25.Rb7 Rc7 (25...Rc1 26.Nf1 Rc7 27.Rc7 Qc7 28.Qa8+–) 26.Rc7 Qc7 27.Qa7 (27.Qa8 Qc1 28.Nf1 Qc5+–) 27...Qa7 28.Ra7 Ke6 (28...Be7 29.Nf3 h6 30.Nd4+–) 29.Rh7 Ke5 (29...Bc3 30.Nb3+–) 30.d4 (30.g4 Kd6+–) 30...Ke6 31.Rh6 (better is 31.Nb3 Kd6+–) 31...Kf5 (31...Kf7 32.Nf3+–) 32.h3 (better is 32.e4 de4 33.g4 Ke6 34.Ne4 Kd5 35.Nf6 Kd4+–) 32...Ke6 33.Nf3 1–0. nordlicht – ronmaro, gameknot.com, 2001.

5.d4 ed4

6.ed4 Nf6 7.Bd3 0–0 8.0–0 Nd5 9.Qd2 Bf6 10.c4 Nb6 11.Qc2 g6 12.Nbd2 Bg4 13.h3 Bf3 14.Nf3 (14.gf3? Nc6–+) 14...Nc6 15.a3 Bg7 16.Rfe1 a6 17.Re2 Re8 18.Rae1 White launches an attack 18...Qd7 19.d5 Na7 20.Bg7 Kg7 21.Qc3 Kg8 22.Ng5 Re2 23.Re2 Qd8 24.f4 Nd7 25.Qe1 h6 26.Ne4 Nf6 (26...b5 27.Qf2+/–) 27.Qf2 b6 (27...Ne4 28.Be4 Nc8 29.f5+–) 28.f5 g5 29.h4 Ne4 30.Re4 Qf6 31.hg5 hg5 32.Qg3 Qa1 33.Kf2 Qb2 34.Be2 (34.Ke1 Qc1 35.Ke2 Qb2 36.Kd1 f6+/–) 34...Qf6+= 35.Qg4 Kf8 36.Re3 Re8 37.Re8 (37.Rg3 Qb2+=) 37...Ke8= 38.Qe4 Kd7 39.Qe3 (39.g4 Nc8=) 39...Qf5+= 40.Qf3 Qf3 41.Kf3 ½–½. Jeschke,Holger – Geppert,Frank, Schleswig Holstein–chA, 1994.

6.Qd4?? Bf6 7.Qd1 Bb2 –+.

6.Nd4 Bf6 7.Ne6 fe6 8.Nc3 Ne7 9.Qg4 Ng6? (better is 9...Qd7=) 10.Qe6+– Qe7? (better is 10...Ne7+–) 11.Qc8 Qd8 12.Bb5 (worse is 12.Qb7 Nd7+–) 12...c6 (12...Kf7 13.Qb7 Nd7 14.Qd5 Ke7 15.0–0+–) 13.Qb7 cb5 14.Qa8 0–0 15.Qd5 Kh8 16.a4 (16.0–0 Qc8 17.Qb3 Nh4+–) 16...Qc8 17.Ra3 ba4 18.0–0 Rd8 (18...Nd7 19.Na4 (19.Qd6?! Nb6 20.Na4 Nc4+–) 19...Nde5 20.Be5 (20.Qd6?! Nc4 21.Qd3 Rd8+–) 20...Ne5 21.Ra2+– (21.Qd6?! Nc4 22.Qd3 Rd8+–)) 19.b5 Rd7 (19...Nd7 20.Na4 (20.Qd6 Nde5 21.Qa6 Nf3 22.gf3 Qh3 23.Qf6 gf6+/–) 20...Qc2 21.Rc1+–) 20.Rd1 Ne5 (20...Ne7 21.Qa8+–) 21.Ra4 Ng6 22.Rc4 Qe8 23.Rb4 Qc8 (23...Be5 24.Ra1+–) 24.Ne4 Bb2 (24...Be5 25.f4 Bb2 26.Rb2+–) 25.Rb2 Qc7 26.Nd6 Qc3 (26...h6 27.c4+–) 27.Qe6 (better is 27.Nf7!? Kg8 28.Nh6 Kf8 29.Qg8 Ke7 30.Rd7 Kd7+–) 27...Rd6 (27...h6 28.Ra2 Kh7+–) 28.Qe8 1–0. fajgo – jones662, internet, 2002.

6.Nd4 Nf6 7.Bd3 0–0 8.Nf5 (8.0–0 Nbd7=) 8...Bf5 (8...Nc6 9.a3=) 9.Bf5 Nbd7 10.0–0 Re8 11.c4 Bf8 12.Nd2 g6 13.Bc2 Bg7 14.e4 (14.Qf3 a5+=) 14...a6 (14...Ne4 15.Bg7 Nd2 16.Qd2 Kg7 17.Rae1+=) 15.f4 (15.Bc3 Nh5 16.Bg7 Ng7=) 15...c6 (15...Ne4 16.Bg7 Nd2 17.Qd2 Kg7 18.Rae1+=) 16.Bd4 (16.Rb1 b5+=) 16...c5 (16...Nd5! 17.Nf3 Bd4 18.Qd4 Nb4+=) 17.bc5= White gets the initiative 17...dc5 18.Bc3 (better is 18.Bf2+=) 18...Nf8 (better is 18...Nd5! 19.cd5 Bc3=) 19.e5+/– N6d7 20.Ne4 Qc7 21.Nd6 Red8 (21...Re7!?+/–) 22.Qd5 Nb6 23.Qb7 Qb7 24.Nb7 Rdc8 25.Nd6 Rcb8 (25...Rc6 26.Rfd1 Rd8 27.Rab1+–) 26.Be4 Ra7 27.Ba5 (better is 27.Rab1+–) 27...Ne6? (27...Nc8 28.Nc8 Rc8+–) 28.Bb6 (28.Rab1!? Nd7 29.Rb8 Nb8+–) 28...Rb6 29.Nc8 Rab7 30.Nb6 Rb6 31.Rab1 Rb1 32.Bb1 (32.Rb1 Nf4 33.Rb8 Bf8+–) 32...Nd4 33.g3 g5 (33...f6 34.ef6 Bf6 35.Bd3+–) 34.Kf2 g4 (34...gf4 35.gf4 h5 36.Be4+–) 35.Be4 h5 (35...Kf8 36.Rb1+–) 36.Rb1 h4 (36...Bf8 37.Rb7+–) 37.Rb8 Bf8 38.f5 (38.gh4 Ne6 39.f5 Nf4+–) 38...hg3 (38...h3 39.Rb7+–) 39.Kg3 f6 (39...a5 40.Kg4 Ne2 41.Bd5+–) 40.Bd5 Kh7 (40...Kg7 41.ef6 Kf6 42.Rf8 Kg5 43.h4 gh3+–) 41.Rf8 Nf5 42.Kf4 Nh6 43.Rf6 1–0. Makowski,Z – Kulesz,B, Szczecin Poland, 1982.

6.Nd4 Nf6 7.Ne6 fe6 8.Nd2 0–0 9.Bd3 Nbd7 10.f4 d5 11.g4 (11.b5!?+=) 11...Bb4–/+ 12.c3 (12.g5 Ne4 13.Be4 de4–/+) 12...Nc5 13.Bc2 Ba5 14.g5 Nfe4 15.Ba3?? (better is 15.Ne4 Ne4 16.Be4 de4 17.Qd8 Rad8 18.Ke2–/+) 15...Bc3–+ 16.Bc5 Bd2 (worse is 16...Nc5 17.Rc1 d4 18.Bb1–+; 16...Nd2?! 17.Ke2 Re8 18.Rc1–+) 17.Kf1 Nc5 18.Qd2 Qg5 19.Rg1 Qh6 20.Rg3 Rad8 21.Qg2 (21.Rc1 e5 22.Bh7 Kh7 23.Rc5 ef4 24.ef4 Qf4 25.Qf4 Rf4 26.Ke2 c6–+) 21...Qf6 22.Rc1 d4 (better is 22...b6 23.Qh3 g6 24.Rg2–+) 23.Bh7 Kh7 24.Rc5 de3 25.Rh5? (25.Qe4 Kg8 26.Rc7 Qa1 27.Kg2 Rd2 28.Kh3 Qf1 29.Kg4 Qd1 30.Kh4 Rh2 31.Rh3 Qe1 32.Kg4 Qg1 33.Rg3 Qd1 34.Qf3–+) 25...Kg8 26.Rg7 (26.Qe4–+) 26...Qg7 27.Rg5 (27.Qg7 Kg7 28.Rg5 Kh6 29.Re5 Rf4 30.Ke1–+) 27...Rd1 28.Ke2 0–1. Agrest,Anton (1780) – Dolukhanova,Evgeniya (2340), Rohde op, 2009.

4.Nf3 f5

5.c4 c6 6.Be2 (6.Nc3 Nd7+/–) 6...Be7+= 7.Qc2 Bf6 8.d3 (8.Nc3 Nh6+=) 8...a5= 9.b5 Nd7 10.a4 Ne7 11.Nbd2 0–0 12.0–0 d5 Black prepares e4 13.Rac1 Rc8 14.bc6 bc6 15.Ba3 e4 (15...c5!?=) 16.Nd4+/– Bd4 17.ed4 Nf6 18.Qc3 (18.de4 Ne4 19.Ne4 fe4 20.cd5 cd5+/–) 18...f4 (18...Rf7 19.de4 Ne4 20.Ne4 fe4 21.Rb1+=) 19.de4+/– de4 20.f3 (20.Rce1!?+/–) 20...e3+= 21.Nb3 Exerts pressure on the isolated pawn 21...Ra8 (21...Re8 22.Qa5 Nf5 23.Qd8 Red8 24.Rfd1+=) 22.Nc5 (22.d5 Bd7 23.dc6 Nc6 24.Bf8 Qf8+/–) 22...Bc8 (22...Bf5 23.g4 fg3 24.hg3=) 23.Nd3 Nh5 24.Ne5 Rf6 25.Rfd1 Rh6 26.d5 c5 (26...cd5 27.cd5 Passed pawn) 27.Bc5 (27.Ng4 Rg6 28.Qe5 Nf5 29.Bc5 Rg5+–) 27...Nf5 (27...Ng6 28.Ng6 hg6 29.Qe1+/–) 28.Ng4+– Rg6 29.Bd3 (better is 29.Qe5+–) 29...Qh4?? (better is 29...Rg5+–) 30.Qe5 Bd7 31.Bf5 Bf5 (31...Re8 32.Bg6 (32.Bd7 Re5 33.Rb1 h6–/+) 32...hg6 33.Qb2 Bg4 34.fg4+–) 32.Qf5 Ng3 (32...Qg5 33.Qg5 Rg5+–) 33.hg3 fg3 34.Ne3 (better is 34.d6 h5 35.Qg6 hg4 36.Qe6 Kh8+–) 34...Qh2 35.Kf1 Qh4 (35...Rf6 36.Qe4 Qh5+–) 36.d6 Rd8 37.Ke2 (37.d7 Rf6 38.Qe5 Qf4 39.Qf4 Rf4+–) 37...Rf6 38.Qd5 Kh8 39.Rh1 Qf4 40.Rcd1 Rg6 41.Rd4 Qf6 42.Rh5 Rh6 43.Rh6 Qh6 44.Rg4 Qh1 (44...Rf8 45.d7 Qf6 46.Bd4 Rd8 47.Bf6 gf6 48.Qf7 Rd7 49.Rg8) 45.Qg5 Rg8 (45...Qd1 46.Nd1 Re8 47.Kd3 g6 48.Bd4 Kg8 49.Qd5 Re6 50.Qe6 Kf8 51.Rf4) 46.Bd4 1–0. Dias,Jose Oliveira Gaspa (1680) – De Prado Rodriguez,O (2225), Lisbon Christmas Op, 2014. (=1.Nf3 f5 2.b4 d6 3.Bb2 e5 4.e3 Be6)

5.c4 Nc6 6.d4 ed4 7.Nd4 Nd4 8.Bd4 =.

5.c4 Nd7 6.Be2 Be7 7.Qc2 c6 8.a4 Bf6 9.Nc3 Ne7 10.d4 e4 11.Nd2 0–0 12.b5 d5 13.Ba3 f4 14.cd5 cd5 15.Qb3 fe3 16.fe3 Nf5? (better is 16...Bf7!?=) 17.Bf8+/– Nf8 18.Bg4?? (better is 18.Nd1+/–) 18...Ne3–+ 19.Be6 Ne6 20.Nde4 Nd4 (worse is 20...Ng2 21.Kd1 Ne3 22.Kd2 Nc4 23.Ke1 Nd4 24.Qa2 de4 25.Qc4 Kh8 26.Ne4–+) 21.Qa2 Kh8 (better is 21...Ndc2 22.Kd2 Bc3 23.Nc3 Qh4 24.Nd5 Rd8–+) 22.Kd2?? (better is 22.Nd5 Nd5 23.0–0–+) 22...de4 23.Ke3 Nf5 24.Kf4 Qd6 25.Ke4 (25.Kg4 Ne3 26.Kh3 Qf4 27.Qg8 Kg8 28.Ne4 Qg4) 25...Qd4 26.Kf3 (26.Kf5 g6 27.Ke6 Qe5 28.Kf7 Qe7) 26...Qe3 0–1. Fichte,Wolfgang (2035) – Stotyn,Fabian (2195), Bad Zwesten op 9th, 2005. (=1.Nf3 f5 2.b4 d6 3.Bb2 e5 4.e3 Be6)

5.c4 Be7 6.d4 Nf6+= (6...Nd7 7.d5 Bf7 8.a3=) 7.de5 de5 8.Qd8 =.

5.c4 Be7 6.Be2 Bf6= (6...Nh6 7.0–0 0–0 8.Nc3=) 7.d4 (7.0–0 Ne7 8.d4=) 7...e4 8.Nfd2 Ne7 9.Nc3 (9.0–0 d5=) 9...0–0 10.Qc2 c6 11.0–0 d5 12.a4 Nd7 13.b5 Ng6 (13...f4 14.bc6 bc6 15.Ba3=) 14.Rac1 f4 (14...Rc8 15.bc6 Rc6 16.Nb5=) 15.bc6 (15.cd5!? cd5 16.Qb3+=) 15...bc6= 16.cd5 cd5 17.Nb5 Qb6 (17...fe3 18.fe3 Bg5 19.Qb3 Rf1 20.Bf1= (worse is 20.Rf1 a6–/+)) 18.Qc7 (18.Ba3 Be7=) 18...Bd8= 19.Qb6 (19.Qc6 Rb8 20.Ba3 fe3 21.fe3 Bg5 22.Rf8 Ndf8=) 19...Nb6+= (worse is 19...Bb6 20.Nc7 fe3 21.fe3 Rf1 22.Kf1 Rf8 23.Ke1=; worse is 19...ab6 20.Bd1=) 20.a5 Nd7 (20...fe3 21.fe3 Na4 22.Ba3 Rf1 23.Nf1 Ba5 24.Bd1+=) 21.Ba3 (21.Nc7 fe3 22.fe3 Rb8+=) 21...Rf6 (better is 21...fe3!? 22.fe3 Rf1 23.Kf1 Ba5+=) 22.Nc7+= Bf7?? (better is 22...Rb8+=) 23.Na8+– Ba5 24.Nb3 Bb6 25.Nb6 Rb6 (25...ab6 26.Rc8 Ngf8 27.ef4 Rf4 28.Rfc1+–) 26.Rc8 Ndf8 (26...Ngf8 27.Nc5 Rb8 28.Rc7 Nc5 29.dc5+–) 27.Nc5 1–0. Cox,Tristan (2060) – Papier,Alan, 3rd South Wales Int, 2006.

5.c4 Be7 6.Be2 (6.d4 Nc6=) 6...Bf6 (6...Nc6 7.d4 e4 8.Nfd2+=) 7.Qc2 (7.0–0 Nc6=) 7...Nh6 (7...Nc6 8.a3+=) 8.0–0= 0–0 (8...Nc6 9.a3=) 9.d4 e4 10.Nfd2 c6 (10...Nc6 11.b5 Ne7 12.f3+=) 11.Nc3 (11.f3 ef3 12.Rf3 Qb6+=) 11...Na6 12.a3 Nc7 (better is 12...c5 13.d5 cb4 14.ab4 Bd7+=) 13.d5 (better is 13.f3!?+=) 13...cd5+= 14.cd5 (14.Rfd1 dc4 15.Nc4 Nf7+=) 14...Nd5 15.Nd5 (15.Bc4 Bc3 16.Bc3 Qg5+=) 15...Bd5 16.Bf6 Rf6 (16...Qf6 17.Rac1+=) 17.Rac1 Rg6 (17...a5 18.f3 ab4 19.Bc4 Bc4 20.Qc4 d5 21.Qb4–/+) 18.Bc4= Bc4 19.Qc4 d5 (19...Nf7+=) 20.Qc7 (20.Qd4!?+=) 20...Qg5–/+ 21.g3 Ng4 (21...Rb6 22.Rfd1–/+) 22.Kg2 (better is 22.Qb7!? Rd8 23.Rc8=) 22...Rh6 23.Rh1 Qh5 (better is 23...Rb6–/+) 24.h3? (24.Qb7 Rd8 25.h3 (25.Qa7?? Qh3 26.Kg1 Nh2 27.Rh2 Qh2 28.Kf1 Qh1 29.Ke2 Qc1–+) 25...Ne3 26.Kg1–+) 24...Ne3!–+ 25.Kg1 (25.fe3 Qe2 A double attack) 25...Qe2 26.Nf1 Rc6 (26...Rc6 27.Ne3 Rc7 28.Rc7 f4 29.gf4 Rf8–+) 0–1. Poschmann,Hans – Kaugars,Agnis (2115), Lovegrove op Sen, 2001.

5.c4 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be6).

5.c4 g5 6.d4 g4 7.Nfd2= Bg7 8.d5 +=.

5.d4 d5 6.Ne5 Bb4 7.Bc3 Bd6 8.Nd2 =.

5.d4= Bd5 6.Nc3 Be6 7.de5 +/–.

5.d4= Nd7 6.d5 Bf7 7.c4 =.

5.Be2 Be7 6.0–0 Nd7 7.c4 g5 8.d4+= g4 9.d5 Bf7 10.Nfd2+= h5 11.Qc2 Bg6 12.Re1 Ngf6 13.Nc3 Nf8 14.Bd3 Qd7 15.a4 h4 16.f4 e4 17.Nce4 fe4=+ 18.Ne4 Be4 19.Be4= 0–0–0?? 20.Bf5+– 1–0. pumpkin (2190) – gtan (2150), net–chess.com, 2005.

5.Be2 Be7 6.0–0 Nf6 7.c4 h6 8.d4 e4 (8...0–0 9.d5 Bf7 10.Nc3+=) 9.Nh4+/– d5 10.Bh5 (better is 10.Ng6 Rh7 11.b5+/–) 10...Nh5= 11.Ng6 (11.Qh5? Bf7 12.Ng6 Qd6 13.Qf5 Qg6 14.Qc8 Bd8 15.cd5 Bd5–+) 11...Rg8 (11...Nf6!? 12.cd5 Nd5 13.Nh8 Bb4=) 12.Qh5+= Nd7 (worse is 12...Bb4 13.Nf4 g6 14.Qd1+/–) 13.cd5 Nf6 14.Qe2 Nd5 (worse is 14...Bd5 15.Nc3+/–) 15.Qb5 Kf7 16.Ne5 Kf6 17.Nc3 Nc3 18.Bc3 Qd5 19.Qe2 g6 20.a3 a6 21.Rac1 c6 (21...Kg7 22.f4=) 22.Ba1 (22.f3 Kg7+=) 22...Bd6 23.Nc4 Bc7 24.f3 Ke7 25.f4 (25.Ne5 ef3 26.Rf3 Be5 27.de5 Rad8+=) 25...g5 (25...Qb5 26.Rc2+=) 26.Qh5 gf4 27.ef4 Raf8 28.Ne3 Qa2 29.Qh6 Kd7 30.g3 (30.d5 Bd5 31.Rc2 Qb3= (31...Qa3?? 32.Nd5 Rf7 33.Nf6 Kc8 34.Ng8+–)) 30...Bb6 (30...Rh8 31.Qg7 Kc8 32.Rc2 Qa3 33.Rc3+=) 31.Qh7? (better is 31.Kh1!? Rh8 32.Qg7 Kc8 33.Rc2 Qa3 34.d5 Qe3 35.de6+=) 31...Kc8–/+ 32.Qe7 Bd7?? (better is 32...Rf7 33.Qd6 Rd8–/+) 33.Nc4+/– Bc7 (better is 33...Bd8!? 34.Qc5 Be6+/–) 34.d5+– Re8? (34...cd5 35.Nb6 Deflection) 35.Nd6 (better is 35.Qc5 Rg6 36.Be5 Be5 37.fe5+–) 35...Bd6 36.Qd6 Qa3? (better is 36...Rh8 37.Bh8 Rh8+–) 37.Be5 Kd8 (37...Re5 38.fe5 Qd3+–) 38.dc6 bc6 39.Rc3 Qa4 40.Rd1 c5 (40...Qd1 41.Qd1 Re6+–) 41.Bf6 1–0. Lorenc,Tomas (2090) – Sejkora,Vlastimil (2225), Karlovy Vary op, 2009.

5.Be2 Nf6 6.0–0 Be7 7.c4 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 0–0 7.0–0 Be6).

5.Be2 Nf6 6.c4 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 Be6).

5.Be2 h6 6.d4 e4+= 7.Nfd2 (7.Ng1 d5 (7...Nf6 8.Nh3 d5 9.Nf4 Bf7 10.c3 a5 11.ba5) 8.Nh3 Bb4 9.Nd2 Nf6 10.0–0 0–0 11.Nb3) 7...Bf7 (7...Nf6!?= 8.c4 d5 9.b5 a6 10.Qb3 ab5 11.Qb5; 7...d5 8.0–0 Bb4 9.c3 Be7 10.Qb3 b6 11.c4) 8.c4+/– Nf6 9.Nc3 Be7 10.g3 (better is 10.0–0!?+/– 0–0 11.f3) 10...0–0= (10...Nc6 11.b5) 11.Qc2 (11.Qb3=) 11...d5 12.b5 c6 13.a4 Nbd7 14.c5 (14.0–0 c5=) 14...Bh5 15.Bh5 Nh5 16.h4 (16.0–0!?=) 16...Ndf6–/+ 17.Ne2 Ng4 18.Nf1 (18.Bc3 Qd7–/+) 18...Qd7 19.Qb3 Bd8 (19...a6 20.b6–/+) 20.Bc3 Bc7 21.b6 (21.Nd2!?–/+) 21...ab6 22.cb6 Bd6 23.Bb4 Kh8 (23...Ra6!? 24.Bd6 Qd6–/+) 24.Qa3+= Bb4 25.Qb4 c5 26.Qc5 Rfc8 27.Qa3 Rc2 28.Nh2 Nh2 29.Rh2 Qc6 (29...Rac8!?–/+) 30.Qb3+= Nf6 31.Rh1 (31.a5!?=) 31...Nd7+= 32.a5 Nb6 33.Rb1?? (better is 33.h5–/+) 33...Ra5–+ 34.Kd1 (34.Kf1 Nc4 35.Qc2 Ne3 36.fe3 Qc2 37.Kf2–+) 34...Raa2 35.Qb6 (35.Nc3 Qc3 36.Qc3 Rc3 37.Rb6 Ra1 38.Kd2 Rd3 39.Kc2 Rh1 40.Rb3 Rb3 41.Kb3 Rb1 42.Kc2–+) 35...Rd2 (35...Re2?! 36.Qc6 Rad2 37.Kc1 bc6 38.Rf1–+) 36.Ke1 Re2 37.Kf1 Rf2 38.Kg1 Rg2 0–1. Petrochenko,Maria (1735) – Korchagina,Victoria (2035), St Petersburg RUS, City Ch SF (w), 2013.

5.d4 e4

6.Nfd2?? d5 7.a3 Bd6 (7...Nf6 8.c4=) 8.c4= c6 9.Nc3 Nd7 (9...Nf6 10.Be2=) 10.g3 (10.cd5 cd5 11.Rc1 a6=) 10...Ngf6 11.Qa4 (11.Be2 0–0=) 11...dc4 (better is 11...Nb6 12.Qb3 dc4 13.Nc4 0–0–/+) 12.b5? (better is 12.Nc4!? Bc4 13.Bc4+=) 12...Nb6–+ 13.Qc2 Qd7 14.a4 cb5 15.Nb5 Bb4 16.Bc3 Nfd5 17.Rb1 Bc3 (17...a5!? 18.Be2–+) 18.Nc3–/+ Nc3 19.Qc3 Na4 (19...0–0 20.Qc2–/+) 20.Qa3 (20.Qb4 b5! 21.g4–+) 20...b5 (20...Qc6 21.Be2–+) 21.Qb4 (21.Nc4 bc4 (21...Bc4?! 22.Bc4 bc4 23.Rb4+=) 22.Rb4 Kf7 23.Qa4 Qa4 24.Ra4 c3–+) 21...a6–+ 22.Be2? (better is 22.Nc4 bc4 23.Ra1–+) 22...Kf7 (22...c3 23.Nb3 Rc8 24.Ra1–+) 23.0–0 Rhb8 24.f3 a5 (24...c3 25.Nb3 Qe7 26.Na5 Qb4 27.Rb4–+) 25.Qa3 b4 (25...c3 26.d5 Bd5 27.Bb5–+) 26.Qc1 (26.Qa1 Nc3 27.Bc4 Nb1 28.Qb1 Bc4 29.Nc4–+) 26...Nc3 27.Bc4 Bc4 (better is 27...Rc8!? 28.Be6 Qe6 29.Qe1 Nb1 30.Qb1 ef3 31.Rf3–+) 28.Nc4 Ne2 (better is 28...Rb5 29.Qc3 bc3 30.Rb5 Kg8–+) 29.Kf2?? (29.Kg2 Nc1 30.Ne5 Ke7 31.Nd7 Kd7 32.Rbc1 ef3 33.Kf3–+) 29...Nc1 30.Ne5 Ke6 (30...Ke7 31.Nd7 Nd3 32.Ke2 Kd7 33.Kd2–+) 31.Nd7 Nd3 32.Ke2 (32.Kg2 Kd7 33.fe4 fe4 34.Rf7 Kc6–+) 32...Kd7 33.fe4 (33.g4 Rc8 34.Kd1 Ke6–+) 33...fe4 34.Rf7 (34.Kd2 Ke6 35.d5 Kd5–+) 34...Ke6 35.Rbf1 (35.Rg7 Rf8 36.Rf1 Rf1 37.Kf1 a4 38.Rh7 a3 39.Rh6 Kf7–+) 35...b3 36.R1f5 (36.Rg7 b2 37.Rc7–+) 36...b2 0–1. Tagirov,Kajum K (1880) – Bykov,Evgeny (2045), Moscow Open E, 2011.

6.Nfd2?? Nf6 7.c4 d5 8.a3 c6 9.Nc3 Nbd7 10.c5 Be7 11.g3 (11.Ne2 Bf7=) 11…0–0+= ½–½. Krueger,Wolfgang – Schiebuhr,Stephan, Schleswig Holstein–ch masters, 1998.

6.d5+= ef3 7.de6+/– fg2 (7...Qh4 8.a3 fg2 9.Bg2+=) 8.Bg2 c6?? (better is 8...Qh4 9.Bd4 c6+=) 9.Bg7!!+– Qg5 (9...Bg7 10.Qh5 The nicest combinations are those leading to mate) 10.Bh8 (10.Bc6 Nc6 11.Bh8 Nb4+–) 10...Qg2 11.Qh5 Kd8 12.Rf1 Bg7 13.Bg7 Qg7 14.c3 Ne7 (14...Nh6 15.a4+–) 15.Qf7 Qf7 16.ef7 Nd7 (16...Ng6 17.h4+–) 17.Rg1 Ng6 18.Rg5 f4 (18...Ke7 19.Rf5 Rf8 20.Nd2+–) 19.e4 (better is 19.ef4!? Ke7 20.f5 Ngf8+–) 19...Ke7 20.Nd2 Nde5 21.Rh5 (21.Ke2 Nf7 22.Rgg1 Nfe5+–) 21...Rh8 22.Ke2 Kf7 23.Nf3 Ng4 (23...Nc4 24.Rf5 Ke7 25.Rg1+–) 24.Rd1 (24.Ra5 a6+–) 24...Nf6 25.Ng5 (25.Rf5 Re8 26.Ng5 Ke7+–) 25...Ke7 (25...Kg7 26.Rh3 d5 27.Ne6 Kf7 28.ed5 cd5 29.Nc7+–) 26.Rh6 Ne5 (26...d5 27.ed5 Nd5 28.Ne4+–) 27.f3 (27.Rd6 Kd6 28.Rf6 Kd7 29.Rf4 h5+–) 27...Rg8 (27...Nc4 28.Nh3 Ng8 29.Rh4+–) 28.Rg1 (28.Nh7 Ne8 29.Kf2 Nc4+–) 28...Rg7 (28...b5 29.Rh4+–) 29.Nh3 (29.Rh4 Nf7 30.Nh3 Rg1 31.Ng1 d5+–) 29...Ng6 (29...Rg1 30.Ng1 d5 31.ed5 cd5 32.Nh3+–) 30.Kf2 (better is 30.Kd2 Rf7 31.Kd1+–) 30...Kf8? (better is 30...Rg8+–) 31.Nf4! Ne4 (31...Nf4 Exploits the pin 32.Rf6 Theme: Double Attack) 32.fe4 Rf7 (32...Nf4 33.Rg7 Nd3 34.Kf3 Ne5 35.Kf4 Kg7 36.Rd6 Ng6 37.Kf5+–) 33.Rhg6 hg6 34.Ke3 Rg7 (34...Rf6 35.Rg6 Kf7 36.Rf6 Kf6 37.c4+–) 35.Ne6 (35.Ne6 Kf7 36.Ng7 Kg7 37.Rd1+–) 1–0. Krzewski,Dariusz – Segiet,Janusz, ch woj Olsztyn Poland, 1993.

6.d5+= Bf7 7.Nd4 Bd5 8.c4 Bf7 9.Nf5 =.

6.d5 Bf7 7.Nd4 Bd5 8.Nf5 Nf6 9.Bf6 Qf6 10.Qd5 Qa1 11.Qb7 (11.Qe4 Kd7 12.Qb7 Qb1 13.Kd2 Nc6+–) 11...Qb1 12.Kd2+–.

6.d5+= Bf7 7.Nd4 Qd7 8.Bc4 c6 (8...Nf6 9.Ne6+=) 9.b5 (9.Ne6 Nf6+/–) 9...cd5 (better is 9...Nf6 10.bc6 bc6 11.Nc6 Nc6 12.dc6 Qc6 13.Bf7 Kf7 14.Bf6 Kf6=) 10.Bd3?? (better is 10.Be2+=) 10...ed3–+ 11.Qd3 Nh6 12.0–0 Be7 13.Ne2 (13.Nd2 Bf6–+) 13...0–0 14.Nf4 Ng4 (14...a6 15.ba6 Ra6 16.Nd5–+) 15.Nd5 Ne5 16.Qd4 Rc8 17.Ne7 (17.Nbc3 Rc5–+) 17...Qe7 18.Na3 Be6 (18...Nbd7 19.f4 Bc4 20.Rfb1–/+) 19.Rfd1 Rd8 20.Rac1 (20.Qd2 Rd7–+) 20...a6 21.Qb6 Nc4 (21...Rd7 22.c4–+) 22.Nc4 Bc4 23.a4 (23.Bg7!? ab5 24.Bb2 Ra2 25.Qd4–+) 23...ab5–+ 24.ab5 d5 (24...Ra2 25.Bg7 Nd7 26.Qd4–+) 25.Bd4 Rd6 26.Qc5 b6 (26...Nd7 27.Qb4–+) 27.Qb4 (27.Qc8 Qf8 28.Qb7 Nd7–+) 27...Nd7 (27...Ra5 28.Bc5 bc5 29.Qa5–/+) 28.Ra1 Ra1 (28...Rc8 29.Ra7–+) 29.Ra1 Re6 30.Qb1 (30.Ra8 Nf8 31.Qb2 f4–+) 30...Nc5 (30...Qe8 31.Ra7–+) 31.Ra8 Kf7 32.Qd1 Qg5 (32...Kg6 33.Rg8+=) 33.Ra7 Re7 34.Re7 Ke7 35.Bc5 (35.Qf3 Qg4 (worse is 35...Bb5 36.Qd5 Be2 37.Qe5 Kf7 38.Qd5 Ne6 39.Bb6–/+) 36.Qg4 fg4 37.Bc5 bc5–+) 35...bc5 36.Qa1 (36.b6 d4 37.ed4 cd4–+) 36...Bb5 37.Qe5 Kf7 (37...Kf8 38.Qd5 Ke8–/+) 38.Qd5–/+ Kg6 39.Qc5 Be2 40.h3 (40.c4 Qd8 41.Qd5 Qb6–/+) 40...Qf6 (40...Bf3 41.Qd6 Kf7 42.Qd7 Kf8 43.Qd6 Ke8 44.Qe6 Kd8 45.g3–/+) 41.Qd5 (41.c4 Qe6–+) 41...Qa1 (41...Qc3 42.Qe6 Kg5 43.f4 Kh4 44.Qe7 Kg3 45.Qg5 Bg4 46.Qh4 Kh4 47.Kh2 Bh3 48.g3 Kg4 49.Kh1 Qc2 50.e4 Qg2) 42.Kh2 Qa6 43.e4 fe4 (43...Qc8 44.Kg3–/+) 44.g4 (44.Qe4 Kh6–/+) 44...Kf6 (44...Qb5 45.Qe4 Kf6 46.Qh7–/+) 45.Qf5 Ke7 46.Qe4 Qe6 47.Qh7 Qe5 48.Kg2 Qd5 49.Kh2 Kf7 (49...Qd6 50.Kg2 Qd4+=) 50.Qh4 (better is 50.f4!?+=) 50...Qc5–+ 51.Qg3 Bb5 (better is 51...Qc2!? 52.Qf4 Ke6 53.Qe3 Kf6 54.Qf4 Kg6 55.Qd6 Kh7–/+) 52.c3 Bc6 53.Qe3 Qd5 Threatening mate: Qg2 54.Kg3 Bb5 (54...g5 55.f3+=) 55.Qf3 (55.f4 Bc4=) 55...Ke6 56.Qd5 Kd5 57.Kf4 (better is 57.f4–/+) 57...Be8 (57...Kc4 58.h4–/+) 58.h4 (58.Ke3!?+=) 58...Kc4–/+ 59.Ke5 (59.h5 Kc3 60.Ke5 Kc4–/+) 59...Bd7 60.g5 (60.f3 Bc6–/+ (worse is 60...Kc3 61.h5+=)) 60...Bg4 (60...Kc3 61.h5 Bc6 62.h6 gh6 63.gh6+–) 61.f4 (61.f4 Kc3 62.f5=). Poschmann,Hans – Zimmermann,Joerg, TT–04.25 TSC, 2003.

6.d5 Bf7 7.Nd4 Nf6 8.Bb5+= Nbd7 9.Nf5 a6 10.Ba4 Bd5?? (better is 10...Bg6 11.Nd4 Qc8+–) 11.Bf6+– Qf6 12.Qd5 c6 (12...Kd8 13.Nd4 (13.Qb7?! Rb8 14.Qc6 Qf5+/–) 13...c6 14.Bc6 bc6 15.Nc6 Ke8 16.Qe4 Be7 17.Ne7+–) 13.Qe4 Kd8 14.Qh4 g5 (14...Qh4 15.Nh4 a5 16.ba5 Ra5 17.Bb3+–) 15.Qd4 Ne5 16.e4 d5 17.Nc3 Kc7 18.0–0–0 de4 19.Ne3 Nd3 (19...Rd8 20.Qd8 Qd8 21.Rd8 Kd8 22.Rd1 Kc8 23.Ne4 Bb4 24.Ng5 Ba3 25.Kb1+–) 20.Rd3 (20.Rd3 Qd4 21.Rd4+–) 1–0. themonkey (2085) – lisarik (2020), GameColony.com, 2002.

4.Nf3 f6

5.c4 Nc6 6.a3 (6.b5 Nce7+/–) 6...g6 (6...Nge7 7.Nc3+=) 7.d4 Nce7 (7...ed4 8.ed4 Qe7 9.Be2 Bc4 10.Nc3+=) 8.d5 Bf7 9.Nbd2 Bg7 10.Qa4 c6 (10...Qd7 11.Qd7 Kd7 12.Bd3+=) 11.Be2 (11.Rd1!? a5 12.Ne4+/–) 11...Nh6+= 12.h3 (12.dc6 bc6 13.0–0 0–0+/–) 12...0–0 (12...a5 13.dc6 ab4 14.Qb3 bc6 15.ab4 Ra1 16.Ba1+=) 13.e4 a6 (13...cd5 14.ed5 Nhf5 15.0–0+=) 14.Qb3 cd5 15.cd5 b5 (15...f5 16.Rd1+=) 16.Rc1 f5 17.Ng5 fe4 18.Nf7 Rf7 (18...Nf7 19.Ne4 Bh6 20.Rc2+/–) 19.Ne4 Nef5 20.Ng5?? (20.Rc6+/–) 20...Rf6 (better is 20...Qg5 21.0–0 e4 22.Bg7 Rg7–+) 21.Ne6+– Qb6 22.Ng7 (22.Rc6!? Qb7 23.Bf3 Rf7+–) 22...Ng7 (22...Kg7 23.g4 Nd4 24.Bd4 Qd4+= (24...ed4? 25.g5 Rff8 26.gh6 Kh6 27.Rc6+–)) 23.0–0+/– Raf8 24.Bf3 (24.Rc6 Qb7 25.a4+=) 24...Ngf5+= 25.Rc6 Qa7 26.Qd3 (26.Qc2+=) 26...Kh8 (better is 26...Nh4!? 27.Qe3 Nf3 28.gf3 Qf7 29.Qh6 g5 30.Qg5 Rg6 31.Qg6 A) worse is 31...hg6 32.Rd6 Qf5 33.Re1+= (worse is 33.Ra6 Qg5 34.Kh2 Rf3 35.Ra8 Kg7 36.Ra7 Kf8 37.Ra8 Ke7 38.Ra7 Kd6–+); B) 31...Qg6 32.Kh2 Rf3 33.Be5 Qg5 34.Rc8 Kf7 35.Rc7 Ke8+=) 27.Rfc1 (27.Bc1 Ng8 28.Bg5+/–) 27...R6f7? (27...Nh4 28.Rc7 Nf3 29.gf3+=) 28.Rc8 (28.R1c2 Kg7+/–) 28...Rg8? (28...Nh4 29.Rf8 Rf8 30.Rc6 Nf3 31.gf3=) 29.Rg8 (29.Qe4 Nd4 30.Bd4 ed4+–) 29...Kg8 (29...Ng8 30.Be4+/–) 30.Rc8 (30.Rc6 Kg7 31.Qe4 Re7+/–) 30...Kg7 31.Qd2 (better is 31.Rc6+/–) 31...Qe7? (31...Nd4 32.Bd4 Qd4 33.Qd4 ed4 34.Rc6+=) 32.Bg4 (better is 32.Rc6!?+–) 32...Qh4 33.Bf5 Nf5 34.f4?? (better is 34.Rc6+/–) 34...Qf4?? (better is 34...Ng3–+) 35.Qf4+– 1–0. GuestPKVH – fattPatt, freechess.org, 2017.

5.c4 g6 6.b5 Bg7 7.d4 c6 (7...e4 8.d5 Bg4 9.h3 Bf3 10.gf3 ef3 11.Nd2=) 8.Nbd2 Ne7 9.Be2 0–0 10.0–0 a6 11.a4 Nd7 12.e4 ab5 13.ab5 cb5 14.Ra8 Qa8 15.cb5 b6 16.h3 (16.d5 Bg4+=) 16...d5 17.Qb3 ed4 18.Nd4 Nc5 19.Qb4 de4 (19...Bf7 20.Ra1 Qd8 21.Nc6 Nc6 22.bc6 de4 23.Bc4=) 20.Ne6+= Ne6?? (better is 20...Nd5 21.Qc4 Ne6+=) 21.Qe7+– Re8 22.Qd6 Nc5 (22...Qd8 23.Ne4 f5 24.Bg7 fe4 25.Qd8 Rd8 26.Bh6+–) 23.Bc4 Kh8 24.Bf6 (24.Qb6?! Na4 25.Qd4 Rd8 26.Qe4 Qe4 27.Ne4 Nb2+–) 24...Nd3 (24...Qb8 25.Qd4 Qc7 26.Re1+–) 25.Ra1 Qb7 (25...Qb8 26.Bg7 Kg7 27.Qd7 Kh6 28.Ra7+–) 26.Bd5 Qc8 (26...Qb8 27.Ra8 Qa8 28.Ba8 Ra8 29.Ne4 Nf2 30.Kf2 Ra2 31.Kg1 Ra8 32.Qe7 Bf6 33.Nf6 Ra1 34.Kh2 Rh1 35.Kh1 h6 36.Qf8) 27.Ra8 (27.Ra7 Re7 28.Qe7 Qc1 29.Nf1 Qf1 30.Kf1 Bf6 31.Qf6) 27...Qc1 (27...Qa8 28.Ba8 Ra8 29.Ne4 Nf2 30.Kf2 Bf6 31.Qf6 Kg8 32.Qe6 Kf8 33.Qd6 Ke8 34.Qc6 Kf7 35.Qa8 Ke7 36.Qb7 Ke6 37.Qc6 Ke7 38.Qd6 Ke8 39.Qc7 Kf8 40.Nd6 Kg8 41.Qf7 Kh8 42.Qf8) 28.Nf1 Ra8 (28...Qc8 29.Qe7 Re7 30.Rc8 Re8 31.Re8) 29.Ba8 Qc8 (29...Qf1 30.Kf1 Kg8 31.Bd5 Kh8 32.Qd8) 30.Bd5 (30.Qe7 Qg8 31.Bd5 Nf2 32.Bg7 Qg7 33.Qe8 Qf8 34.Qf8) 30...h5 (30...Qe8 31.Qb6 Qf8 32.Bg7 Kg7 33.Qa7 Kh6 34.Qe3 Kg7 35.b6+–) 31.Be4 Nc5 32.Bg6 Nd7 33.Bg7 Kg7 34.Bf5 (34.Bf5 Qd8 35.Bd7+–) 1–0. GuestBKDD – uuyiui, freechess.org, 2017.

5.d4 e4 6.a3?? ef3–+ 7.Qf3 c6 8.c4 Ne7 9.Bd3 Nd7 10.0–0–/+ Ng6 11.Nd2 Qc7 12.Qe4= 0–0–0?? 13.Qe6+– Kb8 14.b5. denbo347 – Bull_Dog_Baz, ChessWorld.net, 2011.

4.Nf3 Nf6

5.a3 Nc6 6.d4 e4 7.b5 +=.

5.a3 Qd7 6.c4 h5 7.d3 h4 8.Nbd2 h3 9.g3 Nc6 10.Be2 Ng4 (10...0–0–0!?=) 11.0–0 f5 12.d4 e4 (12...ed4 13.ed4 d5+/–) 13.Ne1 (13.Ng5 Bg8 14.Bg4 fg4+–) 13...Ne7? (13...d5!?=) 14.Bg4 fg4 15.Ne4?? (better is 15.d5 Bf5 16.Qc2+=) 15...Nf5?? (15...Bc4 16.Nd3 Qf5 17.f3–/+) 16.Ng5?? (16.d5 Bf7+–) 16...Be7?? (better is 16...Bc4 17.Qg4 Bf1 18.Qe4 Be7+=) 17.Ne6+– Qe6 18.Qg4 0–0–0? (18...Rf8 19.d5 Qh6 20.Nd3+–) 19.Nf3 (19.d5 Qd7 20.e4 Nh6 21.Qd7 Kd7 22.Bg7 Rh7+–) 19...Qf7 (19...Kb8 20.d5 Qf7 21.Nd2+–) 20.Ng5 (better is 20.e4+–) 20...Qf6 (better is 20...Qg6 21.f4 Rd7+–) 21.Ne4 Qf7 22.Ng5?? (22.Nd2!? Kb8+–) 22...Bg5?? (better is 22...Qf6=) 23.Qg5+– Rdf8 (23...d5 24.Qg4 Qh5 25.Qh5 Rh5 26.cd5+–) 24.d5 Ne7 (24...Re8 25.Qf4+–) 25.Qg4 (25.Bg7?? Qf3 26.Qg4 Qg4–+; 25.Qg7?? Qf3 26.Qg4 Qg4–+) 25...Kb8 26.f4 (26.Qg7?? Qf3 27.Qf8 Rf8 28.c5 Qg2) 26...Rh6 (26...Rhg8+–) 27.Qg7 (worse is 27.Bg7 Rg8=) 27...Rg6 28.Qf7 Rf7 29.Rae1 Nf5 30.e4 Ng3 31.hg3 Rg3 32.Kh2 (32.Kh1 Rg2 33.Bd4 Rd2+–) 32...Rb3?? (better is 32...Rg2 33.Kh1 Rb2+–) 33.Re2 Rg7 (33...c6 34.f5+–) 34.f5 (34.Bg7 c5 35.f5 cb4 36.f6+–) 34...Rf7 35.f6 a6 36.Rff2 Ka7 0–1. Fournier,Frederic (2170) – ebano (2210), Active, 2003.

5.a3 h6 6.Be2 Be7 7.c4 0–0 8.0–0 a5 9.b5 Nbd7 10.Nc3 Nc5 11.d4 ed4 12.Nd4 (worse is 12.Qd4 Nb3 13.Qd3 Na1 14.Ra1 Bg4–/+) 12...Qd7 13.Na4 Na4 14.Qa4 Ne4 15.Qc2 f5 16.Bf3 Nc5?? (better is 16...Bf6+=) 17.Ne6+– Ne6 18.Bb7 Rad8 Black prepares f4 19.Bd5 Kh8 20.Qc3 (better is 20.Qa4!? Bf6 21.Bf6 Rf6 22.Qa5 f4+–) 20...Bf6 21.Qc2 Nc5?? (21...Be7 22.Qa4 Bf6 23.Bf6 Rf6 24.Qa5 f4+–) 22.Bd4+– f4 23.Bf6 Rf6 24.ef4 Rf4 25.a4 Rdf8 26.Ra3 Qe7 27.Rg3?? (27.Qd2 Qf6 28.g3 Qd4+–) 27...R8f6 (27...Rf2 28.Qf2 Rf2 29.Rf2 Qe1 30.Rf1 Qe8+/–) 28.Re3?? (better is 28.Qd1+/–) 28...Qf8 (better is 28...Qe3! 29.g3 Rf2 30.Rf2 Nd3–+) 29.f3 (29.Qd2 Nd7+–) 29...Qd8 30.Rfe1 Rf8 31.Re7 R4f6 32.Bc6 Qc8 33.Re8 Qf5 34.Qf5 Rf5 35.R8e7 Nd3 (35...R5f7 36.Rf7 Rf7 37.Re8 Kh7 38.Bd5+–) 36.R1e3 Re5 37.R3e5 (37.Rd3?! Re7 38.Kf2 g5=) 37...Ne5 38.Rc7 Nc4 39.Bd5 Nb6 40.Bb3 Rf4 41.Rc6 Na4 42.Bc2 (42.Rc8!? Kh7 43.Bc2 g6 44.Ba4 Ra4+–) 42...Kg8 43.b6 Nc5 44.Rd6 Kf8?? (44...Rc4 45.Be4! Ne4 46.fe4+/–) 45.Be4! Ke7 (45...Ne4 46.Rd8 Double attack (46.Rd8 Decoy)) 46.Rc6 Na6?? (46...Ne4 47.b7 Rf8+–) 47.b7 Kd7 1–0. Buck,K1 (1730) – Ollek,K (1735), Dresden GER, 2013.

5.a3 h6 6.Be2 Be7 7.d3 c6 8.Nbd2 Nbd7 9.c4 Qc7 10.0–0 0–0 11.Rc1 Rac8 12.Ne1 Qb8 13.f4 ef4 14.ef4 Bf5 15.Ndf3 d5 16.Kh1 b6 (16...dc4 17.dc4 (worse is 17.Rc4 Be6–/+) 17...c5 18.Ne5=) 17.Ne5 Bh7 18.Bg4 Qb7 (18...Ng4? 19.Nd7 (19.Ng4?! Qd6=; 19.Qg4?! Nf6 20.Qf3 Qb7+=) 19...Ne3 20.Qf3+– (20.Nb8?! Nd1 21.Rd1 Rb8=)) 19.Bh3 Rc7 20.Qe2 Bd6 21.Nd7 Nd7 22.Qg4 g6 23.Qh4 h5?? (better is 23...c5+–) 24.Bd7 f5 (24...d4 25.Bd4 c5+–) 25.Be6 Rcf7 1–0. Frank,Detlev (1810) – Metzner,Arne, Pinneberg–ch, 2007. (=1.a3 e5 2.b4 Nf6 3.Bb2 d6 4.e3 Be6 5.Nf3 h6)

5.b5 c5 6.c4 Be7 7.d4 White threatens to win material: d4xe5 (7.h3 Qc8=) 7...e4 Black threatens to win material: e4xf3 8.Nfd2 Nbd7 9.a4 (9.d5 Bg4 10.Be2 Be2 11.Ke2 h6+=) 9...0–0 10.d5 White threatens to win material: d5xe6 10...Bf5 11.h3 Consolidates g4 11...a6 12.Nc3 White should quickly conclude development. 12...ab5 (12...h6 13.g4 Bg6 14.ba6 Ra6 15.Be2=) 13.ab5 (13.cb5?! Bg6=) 13...Ra1 14.Qa1 Qa8 15.Be2 Qa1 16.Ba1 Ra8 Black threatens to win material: Ra8xa1 17.Bb2 Bg6 18.0–0 Bd8 19.Ra1 Ra1 20.Ba1 A minor pieces endgame occured 20...Ba5 21.Nb3 White threatens to win material: Nb3xa5 21...Bd8 22.Nd2 Ne5 23.Nd1 Nfd7 24.Be5 Ne5 Black has the pair of bishops 25.Nc3 f5 26.f4 ef3 27.Nf3 White has a new backward pawn: e3 27...Bf6 28.Ne5 Be5 29.Na4 Kf7 30.Kf2 Kf6 31.Nb6 f4 32.Nd7 Kf5? (better is 32...Ke7 and Black can hope to survive 33.Ne5 de5 34.ef4 ef4=) 33.Bd3+– Kg5 34.Bg6?? forfeits the advantage (better is 34.h4 and the scales tip in favour of White 34...Kh4 35.Ne5 Bd3 36.Nd3 fe3 37.Ke3+–) 34...fe3+= 35.Ke3 White wins a piece. . 35...Bd4 The bishop dominates 36.Ke4 Kg6 (36...hg6!? is an interesting idea 37.Nb8 Bf6+=) 37.Nf8+/– Kf7 38.Nh7 Kg6 39.Nf8 Kf7 40.Ne6 Bf6 41.g4 (41.Kf5 g6 42.Ke4 Bh4+–) 41...Kg6+/– 42.Kf4 Be5 43.Kf3 Bf6 44.Nc7 Kf7 45.Ke4 g6 (45...Kg6!?+/–) 46.Ne6+– Ke7? (better is 46...Ke8+–) 47.g5 Be5 (47...Bh8 48.Kf3+–) 48.Kf3 (48.Nc5 might be the shorter path 48...b6 49.Na4 Kd8 50.Nb6 Bg3+–) 48...b6 (48...Bc3+–) 49.Kg4 Kf7 50.h4 Bc3 51.h5 Be5 52.Nc7 Bc3 (52...Bh8 doesn't do any good 53.hg6 Kg6 54.Na8+–) 53.hg6 Kg6 54.Ne6 Bd2 55.Nf4 Kf7 56.Kf5 Ke7 57.g6 (better is 57.Ne6 seems even better 57...Kd7 58.g6+–) 57...Bf4 (57...Bc3+– a last effort to resist the inevitable) 58.g7 Kf7 59.g8Q (59.Kf4 Kg7 60.Kg5 Kh7 61.Kf5 Kg8 62.Ke6 Kh7 63.Kd6 Kh6 64.Kc6 Kg6 65.Kb6 Kf5 66.d6 Ke6 67.Kc6 Ke5 68.d7 Ke4 69.b6 Ke5 70.b7 Kd4 71.d8Q Ke5 72.b8Q Kf5 73.Qd5 Kg4 74.Qbg8 Kh4 75.Qh1) 59...Kg8= 60.Kf4 A pawn endgame occured 60...Kf8 61.Kf5 Kf7 62.Kg5 White threatens strongly Ke7 62...Kg7 ½–½. Ruhle,Ernst Albrecht – Wallnoefer,Hannes (1785), Seefeld op, 2002.

5.b5 Nbd7 6.c4 c6 7.a4 c5 (7...cb5 8.ab5 Be7 9.Ng5=) 8.d4 (8.Be2 Be7=) 8...e4 (8...ed4 9.ed4 d5 10.Nbd2=) 9.Ng5 (9.Nfd2 Be7=) 9...Bf5+= 10.d5 (10.Qc2 d5+=) 10...h6 11.Nh3 Ng4 (11...Bg4 12.Be2 Bh3 13.gh3=) 12.Nf4 (12.Be2 Qh4 13.0–0 Be7=) 12...Nge5 (12...Qh4 13.g3 Qe7 14.Be2=) 13.Be2+= Be7 (13...a6 14.Nd2+=) 14.a5 (14.0–0 Bf6 15.Nc3 0–0+=) 14...Bf6 (14...a6 15.b6+=) 15.Bc3 (15.Nc3 a6+=) 15...g5 (15...0–0 16.0–0=) 16.Nh5 Qe7 17.0–0 b6 (17...Rh7 18.Nf6 Qf6 19.a6+=) 18.a6 (better is 18.ab6 Nb6 19.Qc2+–) 18...0–0–0 19.Nf6 (19.Ra3 Bg6+=) 19...Nf6 (19...Qf6 20.Nd2 g4=) 20.Be5 (20.Qc2 h5+=) 20...Qe5= 21.Nd2 h5 22.f3 (22.Ra3!?+=) 22...ef3–/+ 23.Rf3 Ng4 (23...g4 24.Rf1 g3 25.Ra3 gh2 26.Kh1–/+) 24.Nf1+= Nf6 (better is 24...Bc2 25.Qc1 Rd7=) 25.Rf5? (better is 25.Ra3 Ne4 26.Nd2=) 25...Qf5–/+ 26.Ng3 (26.Bd3 Qe5–/+) 26...Qe5–+ 27.Ra3 (27.Nf1–+) 27...Ng4! 28.Bg4 hg4 29.Qg4 Kc7 30.Qf5 (better is 30.Qf3–/+) 30...Rd7?? (better is 30...Qb2 31.Qd3 Rh4–/+) 31.Qe5+= de5 32.e4 f6 33.Nf5 Rdh7 34.h3+/– g4 35.h4 Rh4 36.Nh4 Rh4 37.g3 Rh5 38.Ra2 Kd7 39.Rf2 Ke7 40.Rf5 Rh6 ½–½. Trkn – Ezy Ryder, itsyourturn.com, 2000.

5.b5 Nbd7 6.c4 Be7 7.d4 +=.

5.b5 Nbd7 6.c4 g6 7.d4= Bg7 8.de5 de5 9.Ne5 Nh5 10.Nd3 Bb2 (10...Bc4!? 11.Bg7 Ng7=) 11.Nb2+/– Qf6 12.Qc1 Nb6 13.Nd2 0–0–0 14.a4 Bg4 (14...Nd7 15.Be2+/–) 15.h3 Qh4 (15...Be6 16.c5 Nd5 17.c6 Ne3 A) 18.fe3? Qh4 19.Kd1 Bb3 20.Ke2 Ng3 21.Kf2 Rd2 (21...Nh1?! 22.Kg1 Qf2 23.Kh1 Qd2 24.cb7 Kb8 25.a5–/+) 22.Kg1 Nf1 23.Qf1 Qe4–+; B) 18.cb7 Kb8 B1) 19.fe3 Qh4 20.Kd1 Bb3 21.Ke2 Ng3 22.Kf2 Ne4 (22...Nh1?! 23.Kg1 Qf2 24.Kh1 Qd2 25.a5–/+) 23.Kg1 Qf2 (23...Rd2?! 24.Nd3–/+) 24.Kh2 Nd2–+; B2) 19.Ne4+/–) 16.a5 (16.hg4 Qh1 17.gh5 Qh5+–) 16...Nd7 17.c5 (17.b6 a6+–) 17...Rhe8+/– 18.Qc3 Ndf6 (better is 18...Ng3 19.Rg1 Nf1 20.Rf1 Bf5+–) 19.Rg1?? (better is 19.hg4 Qh1 20.gh5+–) 19...Re3?? (better is 19...Nd5 20.g3 Ng3 (20...Nc3 21.gh4 Bd7 22.b6+/–) 21.hg4 Nc3 22.Rg3 Rd2 23.Kd2 Ne4 24.Kc2 Qf6–+) 20.Qe3+– Re8 21.Qe8! Ne8 22.hg4 Qf6 (22...Qg4 23.Ra4 Qe6 24.Re4+–) 23.gh5 Qb2 24.Rb1 Qe5 25.Be2 Qc5 26.hg6 hg6 27.Rh1 Qc3 28.a6 b6 (28...ba6 29.Rh3 Qa5 30.ba6+–) 29.Rh3 Qf6 30.Bg4 Kd8 31.Rd3 Nd6 32.Nc4 Ke7 33.Nd6 cd6 34.Rc1 Kf8 ½–½. Huelle,Gunter (1785) – Bessert,Maximilian, Leipzig VfB op, 2009.

5.b5 Nbd7 6.Ng5 h6 (6...Bg4!? 7.Be2 Be2 8.Qe2 d5=) 7.Ne6+= fe6 8.c4 Be7 9.Be2 0–0 10.0–0 d5 11.cd5 ed5 12.d3 c6 13.bc6 bc6 14.Nd2 Rb8 15.Qc2 Qc7 16.e4 d4 17.Rab1 c5 18.Ba1 Rb6 19.Rb6 ab6 20.Nc4 Rb8 21.Qd2 (better is 21.a4!?=) 21...b5–/+ 22.Nb2 Nb6 23.Rc1 Ra8 24.Nd1 Ra4 Black prepares c4 25.f3 (better is 25.Qb2!? Qa7 26.Qb3 Kf8 27.a3–/+) 25...Qa7–+ 26.Rc2 c4 27.Nf2 c3 28.Qc1?? (better is 28.Bc3 dc3 29.Qc3–+) 28...Ra2 29.Bd1 Ra1 0–1. Valpa – JuliusCaesar, playchess.de, 2004.

5.b5 h6 6.Be2 c6 7.bc6 bc6 8.c4 Ne4 (8...Nbd7 9.Nc3=) 9.Nc3 (9.Nc3 Nc3 10.Bc3+= (worse is 10.dc3 Qa5+=)). marekt – SweeneyTod, ChessWorld.net, 2002.

5.Bb5 c6 6.Be2 Be7 7.a4 Nbd7 8.c4 (8.0–0 Nd5=) 8...0–0 9.Ng5 h6 (9...Bf5!?+=) 10.Ne6= fe6 11.0–0 d5 12.c5 (12.Bg4 Kf7=) 12...e4 (12...a5 13.d4 ab4 14.Qe1+=) 13.d4 (13.a5 b6=) 13...Qe8 (better is 13...ed3!? 14.Qd3 a5+=) 14.b5 Qg6 15.a5 Kh8 (15...a6 16.bc6 bc6 17.Qa4=) 16.b6 (better is 16.a6!? Rab8 17.ab7 Rb7 18.bc6 Rb2 19.cd7+/–) 16...a6 17.Nd2 Nh7 18.Bh5 Qg5 19.Bg4 Rf6 20.f4 ef3 21.Bf3 Qe3 22.Kh1 Raf8 23.Ra3 (23.Qc2!?=) 23...Qg5 24.h3 Bd8 (24...e5 25.de5 Rf5 26.Nb3 Ne5 27.Nd4–/+) 25.Bc1 Qf5 (25...Qh4 26.Bb2 Ng5–/+) 26.Kh2?? (26.Be2!? Qg6 27.Nf3=) 26...Ng5?? (better is 26...Qf4 27.Kh1 Qd4–+) 27.Bg4 Qg6 28.Bh5?? (28.Re1 Rf4 29.Nf3 Re4=) 28...Qh7?? (better is 28...Rf1 29.Nf1 Rf1 30.Qf1 Qh5–+) 29.Nf3 Nf3 30.Rff3 Rf3 31.Rf3 Rf3 32.Qf3 Nf6 33.Bf7+= Qf5 34.Qg3?? Ng4 35.hg4= Qf7 36.Bf4 Qg6 37.Be5 Bf6 38.Kg1 Qb1 39.Kh2= Bg5 40.Qf3 Qg6 41.Qf8= Kh7 42.Qb8 Bd2 43.Qb7 h5?? 44.gh5 Qh5 45.Kg3 Qg5 46.Kf3= Qe3 47.Kg4 Qe4 48.Kh3 Qf5 49.g4 Qf3 50.Bg3?? Qh1 51.Bh2 Qf3 52.Bg3 Qh1 53.Bh2 Qf3 54.Bg3= ½–½. TIROLOCO – jones662, Live Game Caissa's Web, 2004.

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

5.c4 h6 6.Be2 Be7 7.0–0 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 0–0 6.Be2 h6 7.0–0 Be6).

5.d3 Nc6 6.a3 Be7 7.Be2 0–0 8.0–0 h6 9.Nbd2 Nd7 10.e4 f5 11.b5 f4?? (better is 11...Na5=) 12.bc6+– bc6 13.d4 Rb8 14.Rb1 Kh8 15.de5 de5 16.Ne5 Ne5 17.Be5 Ba3 (17...Rb1 18.Nb1 Bd6+–) 18.Rb8 Qb8 19.Qa1 Kh7 (19...Bc5 20.Bg7 Kh7 21.Bf8 Qf8 22.Nb3+–) 20.Qa3 Rf7 21.Ra1 1–0. birdmove (2250) – kode (2100), net–chess.com, 2011.

5.d3 Nbd7 6.c4 c6 7.Nc3 a6 8.Ng5 Bf5 9.h3 h6 10.Nge4 Be7 11.Qf3 Bg6 12.Be2 d5 13.cd5 cd5 14.Nf6 Nf6 15.a3 d4 (15...Bd6 16.h4+= (16.Nd5? Nd5 17.0–0 Bc7–+)) 16.ed4= ed4 17.Na4 b5 18.Qc6 Nd7 (18...Kf8!? 19.Nc5 Rc8 20.Qa6 Bc5 21.bc5 Rc5+=) 19.Nb6!+/– Ra7? (19...Qb6 20.Qa8 Deflection) 20.Bg4+– (20.Bd4?! Rc7 21.Qa8 Nb6 22.Qd8 Bd8 23.Bb6 Rd7 24.Bd8 Kd8+/–) 20...Bd3 21.Nd7 Rd7 22.Rd1 Bc4 23.Bd4 0–0 (23...Bb4 24.ab4 Qe7 25.Kd2 Be6 26.Be6 fe6+–) 24.Qd7 Bb4 (24...Re8 25.Be3 Qb8+–) 25.ab4 Re8 26.Be3 (26.Be3 Re3 27.fe3 Qh4 28.Kd2 Qf2 29.Kc1 Qe3 30.Qd2 Qa3 31.Qb2 Qe3 32.Kb1 Qe4 33.Ka1+–) 1–0. Fritz 11 – tjw0658, internet, 2013.

5.d3 Be7 6.Be2 Nbd7 7.a3 c6 8.c4 Qc7 9.Nbd2 a5 10.b5 c5 (10...0–0 11.d4=) 11.a4 Nb6 12.Rc1 0–0–0 (12...0–0!?=) 13.Bc3 Nbd7 14.Rb1 b6 15.Nb3 (15.Ng5 d5+=) 15...d5 16.Qd2 (16.Ng5 d4 17.Ne6 fe6=) 16...dc4 17.dc4 (17.Na5 cd3 18.Nc6 Rde8=) 17...Ne4+= 18.Qb2 e5 becomes the focus of attention 18...Nc3 19.Qc3 Bf6 (19...f5 20.Nfd2+=) 20.Qc2 g6 21.0–0 Bg7 (21...Be7!?=) 22.Ng5+= ½–½. Vahl,Laurens – Van Houwelingen,Iris, Netherlands, 2000.

5.d4 ed4 6.Nd4 Be7 7.Bd3 0–0 8.0–0 Nc6 A) 9.Ne6 fe6 10.b5 Ne5 11.Be2 Nd5 12.Nc3 Nc3 13.Bc3 Bf6 14.Rc1 d5 15.f4; B) 9.Nc6 bc6 10.a3 (10.Nd2 a5 11.a3 Qb8 12.c3 ab4 13.ab4 Ra1 14.Ba1 Qb6 15.Nc4; 10.Nc3 Rb8 11.a3 c5 12.Qd2 d5 13.b5 Re8 14.h3 h6 15.a4; 10.a4 Rb8 11.b5 d5 12.Nd2 c5 13.c4 g6 14.Qc2 Qd6 15.cd5; 10.c4 Qb8 11.Bc3 Qb6 12.Nd2 Rab8 13.Qc2 h6 14.Nf3 c5 15.Rab1) 10...Rb8 11.Nd2 c5 12.c4 cb4 13.ab4 Rb4 14.Qc2 Qa8 15.Bd4; C) 9.b5 C1) 9...Ne5 10.Ne6 fe6 11.Be2 Nd5 12.Nc3 Nc3 13.Bc3 Bf6 14.Rb1 d5 15.f4; C2) 9...Nb4 10.Be2 (10.Ne6 fe6 11.Be2 a6 12.a3 Nbd5 13.c4 Nb6 14.ba6 Ra6 15.c5) 10...a6 11.a3 Nbd5 12.ba6 ba6 13.Ne6 fe6 14.c4 Rb8 15.cd5; C3) 9...Nd4 10.Bd4 c5 11.bc6 bc6 12.Nd2 c5 13.Bf6 Bf6 14.Rb1 Rb8 15.Ne4.

5.d4 ed4 6.Nd4 Be7 7.Bd3 0–0 8.0–0 d5 9.a3 A) 9...a5 10.Nd2 (10.ba5 Na6 11.Nd2 Nc5 12.Ne6 fe6 13.Nb3 Nd3 14.cd3 Bd6 15.f4) 10...ab4 11.ab4 Nc6 12.Nc6 bc6 13.Bc3 Qd6 14.Qe2 Ng4 15.Nf3; B) 9...Qd7 10.Ne6 (10.Nc3 Nc6 11.Ne6 Qe6 12.Nb5 Rfc8 13.Re1 Ne5 14.Nd4 Qb6 15.Nf5; 10.Nd2 Nc6 11.Ne6 Qe6 12.Nf3 g6 13.b5 Na5 14.Be5 c5 15.Bc3; 10.Nf3 a6 11.Ne5 Qd8 12.Nd2 Nbd7 13.h3 a5 14.Qf3 ab4 15.ab4) 10...Qe6 11.Nd2 Nc6 12.Nf3 h6 13.b5 Na5 14.Nd4 Qe5 15.Qe2; C) 9...Qd6 10.Nd2 (10.Nc3 Nc6 11.Ncb5 Qd7 12.Nc6 bc6 13.Nd4 Rfb8 14.Qe2 a5 15.b5; 10.Ne6 fe6 11.Nc3 a5 12.Nb5 Qd7 13.Bc3 Nc6 14.Qd2 Ng4 15.f4) 10...a5 11.N2f3 ab4 12.ab4 Nc6 13.Nc6 bc6 14.Ne5 Nd7 15.Qh5; D) 9...Bg4 10.Qd2 (10.f3 Bd7 11.Nc3 Nc6 12.Nc6 Bc6 13.Qd2 a6 14.Ne2 Qd7 15.Nd4) 10...Bd7 11.Nb3 Ne4 12.Be4 de4 13.Nc3 Bf5 14.Qe2 Nc6 15.b5; E) 9...Nbd7 10.Nd2 (10.Ne6 fe6 11.Nd2 a5 12.ba5 Bd6 13.Nb3 Ne5 14.f4 Nd3 15.cd3) 10...a5 11.Bc3 Bd6 12.ba5 Nc5 13.Ne6 fe6 14.f4 Na4 15.Bd4; F) 9...Bd7 10.Nf3 (10.Nb3 a6 11.N1d2 Nc6 12.Nc5 Qc8 13.e4 d4 14.Qe2 Bc5 15.bc5; 10.Qf3 Nc6 11.Nc6 Bc6 12.Bd4 a5 13.b5 Bd7 14.h3 Be6 15.Nc3; 10.Nd2 Nc6 11.N4f3 a6 12.c4 Be6 13.Ng5 Qd6 14.Bf6 Bf6 15.Bh7; 10.Nf5 a5 11.Nd2 Bf5 12.Bf5 g6 13.Bd3 Nbd7 14.Bc3 Bd6 15.ba5; 10.c4 dc4 11.Bc4 Nc6 12.Nc6 Bc6 13.Nc3 Qd1 14.Rad1 a6 15.f3; 10.h3 Nc6 11.Nd2 Ne5 12.Ne6 Be6 13.Be5 Bd6 14.Bd4 a5 15.c4; 10.Nc3 Nc6 11.Nf5 Bf5 12.Bf5 a6 13.Qd2 g6 14.Bh3 Qd6 15.Rad1; 10.b5 a6 11.Nc3 ab5 12.e4 Nc6 13.Ndb5 Bg4 14.f3 Be6 15.ed5; 10.Re1 Nc6 11.Nc6 Bc6 12.Bd4 Qd6 13.Nc3 a5 14.b5 Bd7 15.e4; 10.g3 Nc6 11.Nc6 Bc6 12.Bd4 Qd6 13.Nc3 a5 14.b5 Bd7 15.Re1; 10.Qe2 Nc6 11.Nc6 Bc6 12.Bd4 Qd6 13.Nc3 a5 14.b5 Bd7 15.h3) 10...c5 11.bc5 Nc6 12.Nbd2 Bc5 13.c4 dc4 14.Nc4 Bg4 15.Qb3.

5.d4 ed4 6.Nd4 Be7 7.Bd3 0–0 8.0–0 d5 9.Nd2 A) 9...Qd6 10.c4 (10.Ne6 fe6 11.c4 Nc6 12.a3 b6 13.Qc2 g6 14.cd5 Ng4 15.f4; 10.e4 Nbd7 11.Ne6 Qe6 12.ed5 Qd5 13.a3 Bd6 14.Nc4 Bf4 15.Be2; 10.N2f3 Nc6 11.Nc6 bc6 12.a3 Ne4 13.Be5 Qd7 14.Nd4 Bd6 15.Bd6) 10...Nc6 11.c5 Qd7 12.Nc6 Qc6 13.Nf3 a5 14.Ne5 Qe8 15.a3; B) 9...Bb4 10.Rb1 Bd7 11.N2f3 Re8 12.c4 c5 13.a3 cd4 14.ab4 de3 15.fe3.

5.d4 ed4 6.Nd4 Be7 7.Bd3 0–0 8.0–0 Qd7 9.b5 (9.Ne6 A) 9...Qe6 10.Nc3 (10.Na3 Nc6 11.Nb5 Qd7 12.a3 Ne5 13.c4 g6 14.f4 Nd3 15.Qd3; 10.a3 Nc6 11.Nc3 Ne5 12.Nb5 Qd7 13.c4 a5 14.Be2 ab4 15.ab4; 10.Qf3 Nc6 11.Nd2 d5 12.Bf5 Qd6 13.b5 Ne5 14.Qf4 Neg4 15.h3; 10.Nd2 Nc6 11.Qf3 d5 12.Bf5 Qd6 13.b5 Ne5 14.Qf4 Neg4 15.h3) 10...Nc6 11.Nb5 Qd7 12.a3 Ne5 13.Be2 c6 14.Nc3 Bd8 15.Qd4; B) 9...fe6 10.b5 (10.a3 Nc6 11.f4 d5 12.Nd2 a6 13.Qe2 Qe8 14.g4 g6 15.g5) 10...a6 11.a4 ab5 12.ab5 Ra1 13.Ba1 d5 14.Nd2 Qd6 15.e4) 9...a6 (9...d5 10.Nd2 Qd6 11.c4 Nbd7 12.cd5 Qd5 13.e4 Qh5 14.Qh5 Nh5 15.Ne6; 9...c5 10.Ne6 Qe6 11.Qf3 d5 12.Nc3 Nbd7 13.Bf5 Qd6 14.Rad1 Nb6 15.Nd5; 9...Qc8 10.Nd2 (10.Nc3 Nbd7 11.Ne4 Ne4 12.Be4 Nf6 13.Ne6 fe6 14.Qd4 d5 15.Bf3) 10...Nbd7 11.Ne4 Ne4 12.Be4 Nf6 13.Ne6 fe6 14.Bf3 a6 15.a4) 10.Ne6 (10.a4 ab5 11.ab5 Ra1 12.Ba1 d5 13.Nd2 Qd6 14.c4 Nbd7 15.cd5; 10.c4 ab5 11.cb5 c5 12.Ne6 Qe6 13.Nc3 Nbd7 14.a4 Ne5 15.a5) 10...fe6 11.a4 (11.c4 ab5 12.cb5 d5 13.Nc3 Qd6 14.f4 Nbd7 15.a4) 11...e5 (11...ab5 12.ab5 Ra1 13.Ba1 d5 14.Nd2 Qd6 15.e4) 12.Nd2 Qd8 (12...d5 13.Be5 Ng4 14.Bb2 Bf6 15.Bf6) 13.Nf3 ab5 (13...Qd7 14.Ng5 (14.c4 Qg4 15.c5) 14...ab5 15.ab5 Ra1 16.Qa1+/–) 14.ab5 (14.Bb5?! c6 15.Bc4 d5=) 14...Ra1 15.Ba1 Nbd7 (15...Qd7!?+=) 16.Bc4+/– Kh8 17.Ng5 d5? (better is 17...Qe8!? 18.Ne6 Nb6+/–) 18.Ne6+– Qc8 19.Nf8 Bf8 (19...dc4 20.Nd7 Qd7 21.Qd7 Nd7 22.Bb2+–) 20.Bd5 Bd6 21.Bc4 Nb6 22.Bb3 h6 23.Bb2 Ne4 (23...Qf5 24.Qe2+–) 24.f4 ef4 (24...Nd7+–) 25.Qh5 fe3 26.Qh6 1–0. usingprogram – ayjonsa, internet, 2011.

5.d4 Nbd7 6.Nc3= Bg4 (6...e4 7.d5 Nd5 8.Nd5 ef3 9.Qf3=) 7.Be2 Be7 (7...a5 8.ba5 e4 9.Nd2 Be2 10.Ne2=) 8.e4 0–0 9.0–0 Bh5 (9...Re8 10.a3=) 10.a3 Bg6 11.Qd3 Re8 (11...Ne4 12.Ne4 d5 A) 13.de5? de4 (13...Be4?! 14.Qb3=) 14.Qc3 ef3 15.Bf3 Qb8–+; B) 13.Nfd2 de4 14.Ne4=) 12.Rfd1 d5 13.Ne5 de4 (13...Be4 14.Ne4 Ne4 15.c4+=) 14.Qe3 Bf5 (14...Nf8 15.Bc4+=) 15.Bc4+/– Rf8 16.Qf4 g6 17.g4 Ne5?? (better is 17...Be6 18.d5 Ne5 19.de6 Nc4 20.Rd8 Bd8+–) 18.de5+– Ng4 (18...Bd7 19.ef6 Bf6+–) 19.Rd8 Rad8 20.Ne4 b6 (20...c5 21.Nd6 cb4 22.Nf5 gf5 23.ab4+–) 21.Ng3 Bd7 (21...Bc8 22.e6 Be6 23.Be6 fe6 24.Qg4+–) 22.e6 Be6 23.Be6 fe6 24.Qg4 Bf6 (24...Rd6 25.Re1 Rf7 26.Re6+–) 25.Qe6 Kg7 (25...Rf7 26.Bf6 Rd6 27.Qc8 Rf8 28.Qc7 Rdf6 29.Qa7 R8f7 30.Qa8 Rf8 31.Qd5 Kg7+–) 26.Qe7 1–0. kolya (2030) – rusty_winters, GameColony.com, 2002.

5.d4 e4 6.Nfd2 d5 (6...Be7 7.c4 0–0 (7...Bf5 8.Be2 h6 9.Nc3 0–0 10.0–0 Na6 11.a3 c6; 7...d5 8.cd5 Bd5 9.a3 a5 10.b5 0–0 11.Nc3 c6) 8.Nc3 Nc6 9.a3 Bf5 10.Be2 Re8 11.Qc2 Bf8; 6...Nbd7 7.c4 d5 (7...a5 8.Nc3 ab4 9.Nce4 d5 10.Ng5 Bf5 11.Qb3 Bd6) 8.b5 h6 9.Nc3 Bb4 10.Be2 0–0 11.Qb3 Bc3) 7.a3 (7.b5 a6 (7...Nbd7 8.c4 c6 9.Nc3 Be7 10.Be2 0–0 11.0–0 Qa5) 8.c4 dc4 9.ba6 Na6 10.Bc4 Nb4 11.0–0 Bc4) 7...Bd6 (7...Be7 8.c4 a5 9.b5 0–0 10.Nc3 c6 11.Be2 Nbd7; 7...a5 8.b5 Nbd7 9.c4 Nb6 10.c5 Nbd7 11.Nc3 Be7; 7...Nc6 8.c4 Bg4 9.Qc2 Be7 10.Nc3 0–0 11.cd5 Nd5) 8.c4 c6 9.Nc3 0–0 10.Be2 a6 (10...Nbd7 11.0–0 Qc7) 11.b5 (11.c5 Bc7=; 11.0–0 Nbd7) 11...Nbd7 (11...ab5 12.cd5 Bd5 13.Nd5 cd5 14.Bb5+=) 12.0–0 (12.c5!? Be7 13.bc6 bc6 14.Rb1=) 12...ab5+= 13.cb5 Qe7 14.a4 c5 15.dc5 Nc5 16.Re1 (16.b6 Nfd7 17.a5 Qg5 18.Nde4 Ne4 19.Ne4 Bh2 20.Kh2 de4=) 16...Rfd8 17.Nf1 (17.a5!?+=) 17...Be5–/+ 18.Qb1 (18.Qc2 d4 19.ed4 Rd4–/+) 18...Bc3 (better is 18...Nb3!?–+) 19.Bc3+= Na4 20.Bd4 b6 21.Rc1 Nc5 22.Qb2 Rac8 23.Ng3 Ne8 24.Qb4 f6 (24...Rc7 25.Rc3+=) 25.Ra6= Rd7 (25...Na6?? 26.Qe7 Rc1 27.Nf1+–) 26.Bc5 (26.Rb6 Nd3 27.Rc8 Nb4 28.Bc5+–) 26...bc5–/+ 27.Qa3 c4 28.Qa5 Rb7 29.Bd1 (29.Rb1 Rc5–/+) 29...Rcb8 (29...Nc7 30.Ra7 Nb5 31.Rb7 Qb7 32.Rb1–+) 30.Ba4 (30.b6–+) 30...Bd7 (30...Nc7 31.Ne2 Na6 32.ba6–+) 31.Rb1? (better is 31.b6!? Qd6 32.Bd7 Qd7 33.Rd1–/+) 31...Qc5 32.Qd2 Nc7 33.Ra5 Ra7?? (better is 33...Bb5 34.Ne2 Qd6–+) 34.Ne4= Qb6 35.Ra7 Qa7 36.Nc3 Qa5 ½–½. Mello,Pedro Alcantara – Azevedo,Kelsen Rosas (2230), Rio de Janeiro Clube Naval op 3rd, 1996.

5.d4 e4 6.d5 Nd5 7.Nd4 Qf6 (7...Nb4 8.Ne6 fe6 9.a3 N4a6 10.Qh5 Kd7 11.Nc3 Nc5; 7...Nf6 8.Nc3 d5 9.a3 Bd6 10.Ncb5 Nc6 11.Nc6 bc6; 7...Qg5 8.h4 Qe5 9.Nc3 Nb4 10.Ne6 fe6 11.a3 N4c6) 8.Nc3 Nc3 9.Bc3 Nc6 10.Bb5 Qg5 11.Ne6 fe6.

5.d4 e4 6.Ng5 A) 6...Bg4 7.f3 h6 (7...ef3 8.gf3 Bd7 9.Nc3 d5 10.a3 a5 11.b5 Bd6) 8.Nf7 Kf7 9.fg4 Kg6 10.Be2 Nd5 11.Qd2 Qg5; B) 6...Bf5 B1) 7.d5 h6 8.Nh3 a5 9.ba5 Be7 10.Nc3 0–0 11.Be2 Ra5; B2) 7.b5 d5 (7...h6 8.Nh3 d5 9.c4 Nbd7 10.Nc3 Bh3 11.gh3 Bb4; 7...Nbd7 8.Nd2 Be7 9.Be2 d5 10.0–0 h6 11.Nh3 0–0; 7...Be7 8.Nc3 d5 9.Be2 0–0 10.f3 ef3 11.Bf3 a6; 7...a6 8.Nc3 h6 9.Nh3 Be7 10.Nf4 0–0 11.a4 d5; 7...Nd5 8.Nh3 Nd7 9.Nc3 Nc3 10.Bc3 d5 11.Nf4 Nf6) 8.Nd2 h6 9.Nh3 Bd6 10.c4 0–0 11.Qb3 c6; B3) 7.Nd2 d5 (7...h6 8.Nh3 d5 9.Nf4 Bd6 10.Be2 0–0 11.g4 Bg6) 8.c3 h6 9.Nh3 Bd6 10.Be2 Bh3 11.gh3 0–0; B4) 7.Nc3 h6 (7...d5 8.a3 a5 9.b5 Bd6 10.Be2 0–0 11.0–0 h6) 8.Nh3 d5 9.a3 Bd6 10.Nf4 c6 11.Be2 Qc7; C) 6...Bd7 7.Nc3 (7.d5 h6 8.Nh3 a5 9.b5 Be7 10.Nc3 Bf5 11.Be2 Nbd7; 7.Nd2 d5 8.a3 h6 9.Nh3 Bd6 10.c4 0–0 11.cd5 Bf5; 7.b5 d5 8.c4 h6 9.Nh3 a6 10.Qa4 Bh3 11.gh3 Nbd7) 7...d5 8.a3 Bd6 9.Nb5 0–0 10.Nd6 cd6 11.h4 Nc6.

5.Be2 a5 6.b5 =.

5.Be2 a6 6.a4 (6.0–0 Be7=) 6...Nc6 (6...Nd5 7.c3=) 7.b5 ab5 8.ab5 Ra1 9.Ba1 Na5 (9...Nb4 10.0–0=) 10.0–0 b6 (10...Qd7 11.Bc3 b6 12.Ng5+=) 11.Ng5 Qd7 (better is 11...Bd7+=) 12.c4 (12.f4!?+/–) 12...Nc4 (12...Bc4!? 13.Bc4 Nc4+=) 13.Ne6+= Qe6 14.Qc2 d5 15.d3 Na5 (15...Nd6 16.Qc7 Nb5 17.Qe5 Qe5 18.Be5+/–) 16.Qc7+/– Be7 (16...Nd7 17.Qc8 Ke7 18.Bb2+/–) 17.Be5 (17.Qe5 0–0+–) 17...0–0+/– 18.Bf6 (18.Rc1 Ne8 19.Qc3 Bf6 20.Bf6 Nf6+–) 18...Bf6 19.Rc1 1–0. mtr – geroj3, internet live, 2001.

5.Be2 Nc6 6.b5 Nb4 7.a3 =.

5.Be2 Nc6 6.b5 Ne7 7.0–0 Ng6 (7...c6 8.Ng5=) 8.Ng5 Bd7 9.c4 h6 10.Nf3 Be7 11.d4 unclear. marekt – FmanTheKing, ChessWorld.net, 2003.

5.Be2 Nd5 6.a3 =.

5.Be2 h6 6.d4 (6.0–0 Be7=) 6...e4 7.Nfd2 d5 8.a3 Bd6 (8...a5 9.b5=) 9.c4 c6 10.cd5 (10.c5 Bc7=) 10...cd5 11.Nc3 a6 (11...0–0 12.Rc1=) 12.f3 0–0 (12...ef3 13.Bf3 Nc6 14.Rc1=) 13.fe4+= de4 14.Nce4 (14.Nde4 Ne4 15.Ne4 Qh4 16.Nf2 Rd8+=) 14...Ne4 (14...Nd5 15.Kf2+=) 15.Ne4 Qh4 16.Nf2 Bd5 (16...Rd8!?+=) 17.Bf3+/– Bf3 18.Qf3 Nc6 19.g3 (19.e4 Rfe8+/–) 19...Qe7 20.0–0 (20.e4 a5+/–) 20...f5 21.Rac1 (21.Rae1 Rae8+/–) 21...Rae8 22.d5 (22.Qd5 Kh7+/–) 22...Ne5+= 23.Qh5 (23.Qe2 Nd7+=) 23...Kh7 (23...a5 24.ba5 Ba3 25.Rb1+=) 24.Bd4 g6 (24...b5 25.Be5 Qe5 26.Rc6+=) 25.Qd1+/– g5 (25...b5 26.Be5 Be5 27.Rc6+/–) 26.Qh5 (26.Nd3 Nd3 27.Qd3 Qe4 28.Qe4 Re4+/–) 26...g4 27.Nd1 (27.Kg2!?+/–) 27...Nf3= 28.Rf3 gf3 29.Qf3 (29.Nf2=) 29...Qg5 Black prepares the advance f4 (29...f4 30.Qg2 fg3 31.hg3 Bg3 32.Qc2 Qe4 33.Qe4 Re4+=) 30.Nf2+/– f4 (better is 30...Be5!? 31.Be5 Re5+/–) 31.Ne4+– (31.ef4?! Rf4 32.Qd3 Rf5+=) 31...Qd5?? (better is 31...Qg6 32.Nd6 Qd6 33.ef4 Rf7+–) 32.Nf6 Rf6 33.Qd5 Rfe6 34.Qf5 Kg8 35.Qg4 1–0. mtr – SlowSnow, internet live, 2001.

5.h3 Bf5=.

5.h3 h6 6.Be2 Nbd7 7.0–0 Be7 8.d3 0–0 9.Nbd2 Ne8 10.c4 f5 11.Kh1 c5 (11...a5 12.a3=) 12.a3 (12.bc5 Nc5 13.d4 e4 14.dc5 ef3 15.Bf3 dc5+=) 12...b6 13.d4 e4 14.Nh2 d5 15.Qb3 Ndf6 16.Rac1 cb4 17.ab4 Nd6 (better is 17...dc4!? 18.Bc4 Bc4 19.Rc4 Qd5+=) 18.c5+= Nde8 19.Rc2 bc5 20.dc5 Qc7 21.Ra1 Qd7 (21...f4!?+=) 22.Bd4+/– g5 23.g3 (better is 23.b5!? Qc8 24.Rca2+–) 23...f4+/– 24.c6 Qc7 25.gf4 gf4 26.Rg1 Kh7 27.Bg4 Ng4 28.Ng4 Bg4 (28...fe3!? 29.Qe3 Bg5=) 29.Rg4+/– fe3?? (better is 29...Rd8+/–) 30.Qd5+– Nf6 (30...Bg5 31.Qe4 Kg8 32.Qe6 Kh7 33.fe3 Ng7 34.Bg7 Qg7+–) 31.Qf5 1–0. Junghaenel,Dieter (1685) – Junge,Karl_Heinz (1675), 10sen.Brandenburg op, 2001.

5.a3 Nbd7

6.c4 Be7 7.Be2 0–0 8.d4 ed4 9.Nd4 c5 10.Ne6 fe6 11.0–0 Qe8 12.Qc2 Rc8 13.b5 Qf7 14.Nd2 d5 15.a4 Bd6 16.g3 (16.f4 Rce8=) 16...h6 17.Rad1 Rcd8 18.f4 Bc7 19.Bc3 dc4 (19...Nb6 20.Be5=) 20.Nc4 Nd5 21.e4 Nc3 22.Qc3 Nf6 23.Bf3 b6 24.Ne5 Be5 25.Qe5 Nd7 (25...Rd7 26.a5+=) 26.Qc3 (26.Qc7!?+/–) 26...Nf6+= 27.Qe5 Nd7 28.Qc3 Nf6 ½–½. Fournier,Frederic (1875) – Fancelli,Sophie (1820), FRA Coupe, 2012.

6.c4 Be7 7.Be2 c6 8.0–0 d5 9.cd5 cd5 (9...Bd5 10.Nc3 Bf3 11.Bf3=) 10.Nc3 (10.Ne5!? 0–0 11.f4+/–) 10...a6 11.d3 Rc8 12.Rc1 0–0 13.Qd2 e4 14.de4 de4 15.Nd4 (15.Ng5!?+/–) 15...Qb6 16.Ne6 Qe6 17.Na4 Rfd8 18.Rc8 Rc8 19.Rc1 Rc1 20.Qc1 h6? (20...b5 21.Qc8 Nf8 22.Qe6 Ne6 23.Nb6=) 21.Bd4 (21.Qc8 Kh7 22.Qb7 a5 23.ba5 Qf5+–) 21...Ne5 (21...Bf8 22.Qc8 Qa2 23.Nc3 Qa3 24.Qb7 Bb4 25.Ne4 Qc1 26.Bf1+=) 22.Nc5 (22.Qc7 Nc6 23.Bf6 Qf6 24.Qb7 a5 25.Qa8 Nd8 26.Qe4 ab4 27.ab4 Ne6+–) 22...Qd5? (22...Bc5 23.bc5 Nc6 24.Bc4 Nd4 25.ed4+=) 23.Qb2 (23.Nb7!? Qb7 24.Be5 Ne8+–) 23...Nc4 24.Qc3 Bc5?? (24...Nd6 25.Qc2+=) 25.Bc5?? (better is 25.bc5 b5 26.cb6+–) 25...b5 26.g3 (26.Bd4 Qc6+=) 26...Nd7 27.Bd4 g6 28.Bh8 Nde5 29.Be5 (29.Bc4 bc4 30.Qe5 Qe5 31.Be5 Kf8+–) 29...Ne5 (29...Qe5!? 30.Qc2 Qb2 31.Qb2 Nb2+=) 30.Qc8+= Kg7 31.Qa6 Nf3 32.Kg2 Qg5? (better is 32...Ne1!? 33.Kf1 Nd3+=) 33.Qb5+– (33.Bf3?! ef3 34.Kf3 Qf5 35.Ke2 Qc2 36.Kf1 Qd3 37.Kg2 Qe4 38.f3 Qc2 39.Kf1 Qd3 40.Kg1 Qd1 41.Kf2 Qd2 42.Kf1 Qd3 43.Kf2 Qd2 44.Kf1 Qd3=) 1–0. Fournier,Frederic (2030) – sarraceno (1865), Active, 2004.

6.Be2 Nb6 7.0–0 =.

6.Be2 e4 7.Ng5 d5 8.Ne6 fe6 9.0–0 Bd6 10.d3 Qe7 11.c4 ed3 12.Bd3 dc4 13.Bc4 0–0–0 14.Nd2 Ne5 15.Qe2 Nc4 16.Nc4 Qf7 17.Nd6 Rd6 18.Rfd1 Rhd8 19.Rd6 Rd6 20.Be5 Rd7 21.Rc1 Nd5 22.e4 Nf4 23.Qb5 (better is 23.Bf4 Qf4 24.Qc4=) 23...Ng2?? (better is 23...Qh5 24.Qd7 Kd7 25.Bf4 c6–/+) 24.Kg2+– Qg6 25.Bg3 (25.Kf1!? Qh5 26.Qc5 Qf3+–) 25...Qe4 26.f3 Rd2?? (better is 26...Qd5 27.Qc5 Qc5 28.Rc5 c6+–) 27.Kg1 (better is 27.Kh3 Qf5 28.Qf5 ef5 29.Rc7 Kd8 30.Rg7+–) 27...Qe3= 28.Kf1 (28.Kf1 Qf3 29.Ke1 Qe3 30.Kf1 Qf3 31.Ke1 Qe3 32.Kf1 Qf3=). Fournier,Frederic – dumitrof (1670), rated lightning game, 2002.

6.Be2 h6 7.0–0 Be7 8.d4 e4 9.Nfd2 d5 10.c4 c6 (10...dc4 11.Qc2=) 11.cd5 (11.Nc3 0–0=) 11...cd5 (11...Bd5 12.Nc3+=) 12.Nc3 (12.Qa4 0–0=) 12...0–0 (12...a5 13.ba5 Qa5 14.Qb3=) 13.Rc1 Rc8 14.Nb3 (14.Qa4 Qb6=) 14...b6 15.Rc2 (15.f3 ef3 16.Bf3 Re8=) 15...Nb8 (15...a5 16.ba5 ba5 17.f3=) 16.b5 (16.f3 ef3 17.Bf3 Bf5=) 16...Qd7 (16...Nbd7 17.f3=) 17.Qd2 Rc7 18.Rfc1 Rfc8 19.Bf1 (19.f3 Bd6=) 19...Qd6 20.Ne2 (20.h3 Nbd7=) 20...Rc2+= 21.Rc2 Rc2 22.Qc2 Qd8 (22...a6 23.Nf4=) 23.g3 (23.Nf4 Qc8 24.Qd1 Bd6=) 23...Qc8 (23...Nbd7 24.Nf4+=) 24.Qc8= Bc8 25.Nf4 g5 26.Ne2 Bg4 (26...g4 27.Nf4+=) 27.Nc3 (27.h3 Bf3=) 27...Bf3 (27...Nbd7 28.h3 Bf3 29.Nd2=) 28.Nd2= Bg4 29.h3 Bd7 (29...Bf5 30.f3 ef3 31.Nf3=) 30.f3+= Bf5 (30...ef3 31.Nf3 Bf5 32.Ne5+=) 31.fe4+/– de4 The passed pawn on d4 quickly leads to threats 32.Bg2 Bd6 (32...g4!?+/–) 33.g4+– (33.Be4?! Bh3 34.Bg2 g4+/–) 33...Bg6 (33...Be6 34.Nde4 Ne4 35.Ne4+–) 34.Be4 (34.Nde4 Ne4 35.Ne4 Be4 36.Be4 a6+–) 34...Ne4 35.Nde4 Be7 36.Nd5 (36.d5 f5 37.d6 fe4 38.de7 Kf7+/–) 36...Be4+/– 37.Ne7 Kf8 38.Nf5 (38.Nc8 Nd7+–) 38...Bf5 (38...a6 39.Nd6 Bd5 40.e4+–) 39.gf5+– Nd7 (39...Ke7 40.e4+–) 40.Kf2 (40.e4 Nf6 41.e5 Nd5+–) 40...Nf6 41.Kf3 Nd5 42.e4 Nf4 43.Kg4 (43.Kg3!? Ke7+–) 43...f6 (43...Nd3!? 44.Ba1 Nf2 45.Kh5 Ne4 46.Kh6 Ke7+/–) 44.h4 (44.h4 Nd3 45.hg5 Nb2 46.gh6+–) 1–0. Van De Vyver,Odile – Rottier,Pierre Phil, Open VPTD, 2003.

6.Ng5 Bf5 7.Bc4 (7.Qf3 Bg6=) 7...d5+= 8.Bb3 Bg4 (8...a5 9.Qf3 Bg4 10.Qg3+=) 9.f3= Bh5 10.Nh3 Bd6 11.g4 Bg6 12.g5 Nh5 13.Bd5 c6 14.Bb3 (14.Be4 0–0+=) 14...h6 15.f4 (15.Rg1!?+=) 15...ef4+= 16.ef4 Nf4 (16...Qe7!? 17.Kf2 Nf4 18.Nf4 Bf4 19.Bg7 0–0–0 20.Bh8 Rh8=) 17.Nf4+/– Bf4 18.Qe2 (18.Bg7 Be4 19.Rf1+– (19.Bh8?! Bh1 20.Qe2 Qe7+/–)) 18...Kf8+= 19.Nc3 (19.gh6 Rh6 20.d3 Qh4 21.Kf1 Bf5–+) 19...Qe8 20.0–0–0 hg5 (20...Qe2 21.Ne2 Bg5 22.Rhe1–/+) 21.Qf2 Nf6 22.Rde1 Qd7 23.h4 (better is 23.Bc4+=) 23...Re8?? (better is 23...Ng4 24.Qg2 Rd8–/+) 24.hg5+= Re1 25.Re1 Bg5?? (better is 25...Nh5+=) 26.Qc5+– Kg8 27.Qg5 Rh2 (27...Rh6 28.d3+–) 28.Ne2 (better is 28.Nd1!? Qf5 29.Qg3 Rh3 30.Qb8 Kh7+–) 28...Qd6 (28...Qf5 29.Qg3 Qf2+–) 29.Qg6 (29.Qg6 Qf8 30.Bf6+–) 1–0. Gross,Wilhelm – Merten,Rainer, GER theme m Germany, 1988.

6.Be2 Be7

7.0–0 0–0

8.Re1 a5 9.b5 A) 9...Nb6 10.Nc3 (10.Ng5 Bf5 11.Nc3 d5 12.Nf3 d4 13.ed4 ed4 14.Na2 Bc5 15.Bd3; 10.a4 h6 11.Nc3 c6 12.d3 Nbd5 13.Nd5 cd5 14.h3 Qb6 15.Ra3; 10.d4 Na4 11.Bc1 Nd5 12.Bd3 Nab6 13.e4 Nf4 14.Bf4 ef4 15.Qd2) 10...Nfd5 11.Nd5 Bd5 12.Qc1 Na4 13.c4 Be6 14.Qc2 Nb2 15.Qb2; B) 9...h6 10.a4 (10.Nc3 d5 11.h3 a4 12.Rb1 Bd6 13.Ra1 Qe7 14.Rf1 c5 15.bc6; 10.h3 a4 11.Qc1 Qc8 12.Nc3 b6 13.Na2 e4 14.Nd4 Ne5 15.Ne6; 10.d3 c6 11.Nc3 Qb6 12.a4 d5 13.Rb1 c5 14.Nd2 Qc7 15.Bf3) 10...c5 11.d3 Qc7 12.c4 d5 13.cd5 Nd5 14.Nbd2 Nb4 15.Qc1; C) 9...Re8 10.Ng5 (10.Nc3 h6 11.Na4 c6 12.bc6 bc6 13.c4 Bf5 14.d3 Qc7 15.Qc2; 10.h3 h6 11.a4 Nd5 12.c4 Nb4 13.Nc3 Bf5 14.e4 Bg6 15.d3; 10.c4 Nb6 11.Qc2 h6 12.d4 e4 13.Nfd2 d5 14.c5 Nbd7 15.Nc3; 10.d3 h6 11.c4 c6 12.Nc3 Qc7 13.h3 Rf8 14.Rb1 Rab8 15.d4; 10.a4 h6 11.h3 Nb6 12.Nc3 Qd7 13.d3 Nfd5 14.Nd5 Nd5 15.Qd2) 10...Bf5 11.Nc3 d5 12.g4 Bg6 13.Nf3 Ng4 14.Nd5 Bd6 15.d3; D) 9...e4 10.Nd4 (10.Ng5 Bf5 11.Nc3 h6 12.Nh3 Bh3 13.gh3 d5 14.d3 Nc5 15.de4) 10...Ne5 11.Ne6 fe6 12.Nc3 d5 13.d4 Ng6 14.g3 Qd7 15.Rf1; E) 9...Nd5 10.d4 (10.c4 N5b6 11.Qc2 Nc5 12.d4 Nca4 13.Bc1 f6 14.Nbd2 Qe8 15.Bd3) 10...e4 11.Nfd2 f5 12.c4 N5f6 13.Nc3 Qe8 14.Qc2 Qg6 15.h3.

8.Re1 a5 9.Nc3 A) 9...c6 10.Ng5 (10.d4 h6 11.Qd3 Qc7 12.e4 Nb6 13.Nd2 Rfd8 14.Bf3 ab4 15.ab4) 10...d5 11.Ne6 fe6 12.b5 Bd6 13.f3 Qc7 14.bc6 bc6 15.Na4; B) 9...h6 10.e4 c6 11.d4 Qc7 12.Qd3 Nb6 13.Nd2 Rfd8 14.g3 ab4 15.ab4; C) 9...d5 10.b5 (10.Ng5 Bf5 11.b5 Bd6 12.Nf3 h6 13.h3 Qe7 14.Nh4 Be6 15.Nf3) 10...h6 11.h3 Bd6 12.a4 Qe7 13.Qc1 e4 14.Nd4 Nc5 15.Ne6.

8.Re1 Nb6 9.Nc3 A) 9...h6 10.e4 (10.d3 Qe8 11.h3 Rb8 12.e4 Na4 13.Na4 Qa4 14.d4 Ne4 15.Bd3; 10.h3 a5 11.d3 c6 12.Qd2 Nbd5 13.Nd5 cd5 14.c4 dc4 15.dc4; 10.Bd3 c6 11.Qe2 Nbd5 12.Rac1 a5 13.b5 Qb6 14.Na4 Qc7 15.c4; 10.g3 c6 11.d3 Qc7 12.Qd2 d5 13.Rab1 Rfd8 14.Nd1 Bd6 15.Nc3) 10...c6 11.d3 Qc7 12.Qd2 d5 13.ed5 cd5 14.Nb5 Qc6 15.d4; B) 9...Nc4 10.Bc4 Bc4 11.d4 Nd7 12.Nd2 Nb6 13.Qf3 c6 14.de5 de5 15.Rad1; C) 9...Qd7 10.Ng5 (10.e4 Nc4 11.Bc4 Bc4 12.d3 Be6 13.d4 a5 14.Qd3 Rfd8 15.h3; 10.Qc1 h6 11.e4 c6 12.d3 Qc7 13.Qe3 a5 14.h3 Ra6 15.Nh4) 10...Nc4 11.Ne6 Qe6 12.Bc4 Qc4 13.e4 h6 14.Qf3 a5 15.d3; D) 9...Nfd5 10.Nd5 (10.h3 Nc3 11.Bc3 Qd7 12.d3 f5 13.Bd2 Bf6 14.c3 a5 15.Qc2; 10.Bd3 Nc4 11.Bc4 Nc3 12.Bc3 Bc4 13.e4 Qe8 14.d3 Bb5 15.Qb1) 10...Bd5 11.Qc1 Na4 12.c4 Be6 13.d4 e4 14.Nd2 Nb2 15.Qb2.

8.Re1 Nb6 9.d4 A) 9...Na4 10.Qc1 e4 11.Nfd2 d5 12.c4 Nb2 13.Qb2 c6 14.Nc3 Qd7 15.Rab1; B) 9...ed4 10.Nd4 (10.ed4 Na4 11.Qc1 Qd7 12.Nc3 Nc3 13.Bc3 Rfe8 14.Bd3 Bf5 15.Bd2; 10.Bd4 c5 11.bc5 dc5 12.Bc3 Ne4 13.Qd3 f5 14.Nfd2 Qd5 15.Bf3; 10.Qd4 c5 11.bc5 dc5 12.Qd8 Rfd8 13.Nbd2 Bf5 14.Rac1 Na4 15.Be5) 10...Na4 11.Qc1 Ne4 12.f3 Nb2 13.Qb2 Nf6 14.Nc3 c6 15.Bd3; C) 9...e4 10.Ng5 (10.Nfd2 d5 11.Nc3 a5 12.ba5 Ra5 13.Nb3 Ra8 14.Nc5 Qe8 15.Bb5) 10...Bf5 11.Nc3 h6 12.Nh3 Bh3 13.gh3 Qd7 14.Kg2 d5 15.Rg1.

8.Re1 Nb6 9.Ng5 Na4 10.Ne6 (10.Nc3 Nb2 11.Qc1 Bf5 12.Qb2 h6 13.Nf3 Qd7 14.Bc4 Bg4 15.Be2) 10...fe6 11.Nc3 Nb2 12.Qc1 Na4 13.Na4 Ne4 14.f3 Qd7 15.b5.

8.Re1 h6

9.Nc3 a5 10.h3 (10.b5 d5 11.h3 Bd6 12.Na4 Qe7 13.d3 c6 14.bc6 bc6 15.Rb1; 10.e4 c6 11.d4 ab4 12.ab4 Qc7 13.Qd3 Nb6 14.Nd2 Rfd8 15.Ra8; 10.Qc1 d5 11.b5 c5 12.bc6 bc6 13.Rb1 Qc7 14.h3 Rab8 15.Qd1; 10.d3 d5 11.b5 c5 12.bc6 bc6 13.Rb1 Qc7 14.h3 Rab8 15.Na4; 10.g3 d5 11.b5 a4 12.Rc1 Bd6 13.Ra1 Qe7 14.Qb1 c5 15.bc6) 10...d5 11.b5 Bd6 12.Na4 Qe7 13.d3 c6 14.bc6 bc6 15.Rb1.

9.Nc3 a6 10.e4 (10.h3 c6 11.d3 Qc7 12.Qd2 a5 13.e4 d5 14.ed5 cd5 15.d4; 10.d3 c6 11.Ne4 Ne4 12.de4 Nb6 13.Qd2 Na4 14.c4 Qb6 15.Bc1; 10.g3 c6 11.d3 Qc7 12.Qd2 d5 13.Na4 Ng4 14.Qc3 b5 15.Nc5; 10.d4 e4 11.Nd2 d5 12.f3 ef3 13.Bf3 c6 14.e4 a5 15.ed5; 10.Qb1 d5 11.d4 e4 12.Nd2 c6 13.h3 a5 14.b5 Qc7 15.Na4) 10...c5 11.h3 Qb6 12.Rb1 Rfc8 13.bc5 Nc5 14.d4 Nce4 15.Bd3.

9.Nc3 Nb6 10.e4 (10.Bd3 c6 11.Qe2 Nbd5 12.Rab1 Qb6 13.h3 Nc3 14.Bc3 e4 15.Nd4; 10.h3 a5 11.d3 Qd7 12.Qd2 Rfd8 13.b5 c6 14.bc6 bc6 15.Rab1; 10.d3 Qd7 11.h3 Na4 12.Na4 Qa4 13.c4 Qd1 14.Red1 Rfe8 15.Bc3) 10...c6 11.d3 Qc7 12.Qd2 d5 13.ed5 cd5 14.Nb5 Qc6 15.d4.

9.Nc3 c6 10.h3+= (10.d3 Qc7 11.Qd2 d5 12.Na4 b5 13.Nc5 Bc5 14.bc5 e4 15.Nd4; 10.a4 Nb6 11.a5 Nc4 12.Bc1 d5 13.a6 ba6 14.Bc4 dc4 15.Ne5; 10.Qc1 d5 11.Na4 Qc7 12.h3 Rab8 13.Nc5 Bc5 14.bc5 e4 15.Nd4; 10.Rb1 Nb6 11.d3 Nfd5 12.Qd2 Qc7 13.e4 Nf4 14.g3 Nh3 15.Kg2; 10.e4 d5 11.Bd3 d4 12.Ne2 c5 13.Ng3 c4 14.Bf1 g6 15.h4) 10...d5 11.d3 Qc7 12.Na4 b5 13.Nc5 Bc5 14.bc5 e4 15.de4.

9.Nc3 d5 10.d4 (10.Na4 Qe8 11.d3 a5 12.b5 Bd6 13.Qd2 Qe7 14.h3 c5 15.bc6) 10...e4 11.Ne5 c6 12.Na4 Ne5 13.de5 Nd7 14.b5 cb5 15.Bb5.

9.Nc3 Nh7 10.d3 (10.d4 Nhf6 11.e4 c6 12.d5 cd5 13.ed5 Bf5 14.Bd3 Bd3 15.cd3; 10.h3 Nhf6 11.e4 c5 12.d3 Qb6 13.Qd2 a6 14.Qe3 Rac8 15.Na4) 10...f5 (10...Nhf6 11.e4 c5 12.Qd2 Qb6 13.h3 a6 14.Qe3 Rac8 15.Na4) 11.Qd2 Bf6 (11...Nb6 12.a4 a5 13.b5 Nf6 14.g3 Qe8 15.Kg2) 12.d4 (12.h4 Nb6 13.h5 Qe7 14.b5 Ng5 15.a4) 12...e4 13.d5 Bf7 (13...ef3 14.de6 fe2 15.ed7) 14.Nd4 Bd4 15.Qd4 Qf6 (15...Nhf6 16.Bc4=) 16.Qd2 Ne5 17.Nd1 (17.Nb5!?+=) 17...Qe7= 18.c4 c6 19.Rc1 Rac8 20.a4 (20.dc6!? Rc6 21.Qd4=) 20...cd5+= 21.cd5 Rc1 22.Bc1 Nf6 23.b5 (23.Nc3 Rc8+=) 23...Bd5 24.Nc3 Bf7 (24...Bc4 25.Bc4 Nc4 26.Qd4–/+) 25.a5 (better is 25.Ba3!?+=) 25...Bc4–/+ 26.Bc4 Nc4 27.Qa2 Qf7 28.g3 (28.a6 b6–+) 28...d5 29.Kg2 Ne5 30.Ba3 Rd8 31.Rd1 Nd3 32.h3 Qc7 33.Bb2 (better is 33.Qb3–+) 33...Nb2 (better is 33...Kf7!?–+) 34.Qb2–/+ Qc4 (34...Qa5 35.Qb3 Qc7 36.Nd5 Nd5 37.Rd5 Rd5 38.Qd5 Qf7 39.Qd6+=) 35.h4? (35.Rc1 a6=) 35...Kh7 (35...d4–+) 36.Kh3? (better is 36.Rc1=) 36...d4–+ 37.ed4 Rd4 38.Rd4?? (38.Rc1 Qd3 39.Ne2 Rd5–+) 38...Qd4 (38...Qf1 39.Kh2 Ng4) 39.a6?? (39.Qc2–+) 39...ba6 40.ba6 (40.Qc2 Qc4 41.Kg2 Nd5–+) 40...Ng4 (better is 40...Nd5 41.Na4 Qa4 42.Qe5–+) 41.Kg2 e3 42.fe3 Ne3 43.Kh3 Qg4 44.Kh2 Nf1 45.Kg1 Ng3 46.Nd5 Ne2 47.Kf1 Ng3 48.Kg1 Ne4 49.Kf1 Qd1 50.Kg2 Qd5 51.h5 Nd2 52.Kh3 Qf3 53.Kh2 Qh5 54.Kg3 Qg4 55.Kf2 Qf3 56.Ke1 Qe3 57.Kd1 Nc4 58.Qc2 Qf3 59.Kc1 Qf1 60.Qd1 Qd1 61.Kd1 g5 62.Ke1 g4 0–1. pieeater – Cosmic007, ChessWorld.net, 2011.

9.c4 A) 9...Nb6 10.Qb3 (10.d3 Qd7 11.Nc3 a5 12.Qc2 Rfe8 13.h3 c6 14.Ne4 Ne4 15.de4) 10...a5 11.Nc3 a4 12.Qa2 Qd7 13.d4 e4 14.Nd2 Bf5 15.Qb1; B) 9...a5 10.Nc3 Nb6 11.d3 c6 12.Qc2 Qc7 13.Ne4 Ne4 14.de4 Nd7 15.Bc3; C) 9...a6 10.d4 (10.Nc3 Nb6 11.Qb3 a5 12.d4 a4 13.Qa2 e4 14.Nd2 d5 15.c5; 10.Qc2 Nb6 11.d4 e4 12.Nfd2 d5 13.cd5 Nbd5 14.Ne4 Ne4 15.Qe4; 10.d3 b5 11.Nc3 bc4 12.dc4 Nb6 13.Qb3 Qd7 14.e4 Rfe8 15.Bd3) 10...e4 11.Nfd2 c6 12.Nc3 d5 13.h3 Bd6 14.c5 Bc7 15.Qc2; D) 9...Qe8 10.d4 (10.Nc3 Nb6 11.Qb3 a5 12.d4 a4 13.Qa2 e4 14.Nd2 d5 15.c5; 10.d3 Nb6 11.Nc3 Qc6 12.h3 a6 13.a4 Nbd7 14.Qc2 Qb6 15.a5; 10.Qb3 b5 11.Nc3 Nb6 12.d3 bc4 13.dc4 Qc6 14.Nd2 Bf5 15.e4) 10...e4 11.Nfd2 d5 12.Nc3 c6 13.cd5 cd5 14.Nb5 Qd8 15.Rc1; E) 9...c5 10.bc5 (10.d3 Qb6 11.Nc3 cb4 12.Na4 Qc7 13.ab4 d5 14.cd5 Nd5 15.Nc5; 10.d4 Qb6 11.Nc3 cb4 12.ab4 Qb4 13.Qd2 Qb6 14.Bd3 e4 15.Ne4) 10...Nc5 11.Nc3 Qb6 12.Qc2 Qb3 13.Qb3 Nb3 14.Rad1 Rac8 15.d3.

9.d3 A) 9...c6 10.Qd2 (10.Nc3 Qc7 11.h3 d5 12.Na4 b5 13.Nc5 Bc5 14.bc5 e4 15.de4; 10.Nbd2 Qc7 11.c4 a5 12.Qc2 Ra6 13.Ne4 Rfa8 14.h3 R6a7 15.Bc3; 10.c4 a5 11.Nbd2 Qb6 12.Bc3 ab4 13.ab4 Ra1 14.Qa1 Qc7 15.Rb1; 10.h3 a5 11.Nbd2 Qb6 12.c3 d5 13.Qc2 Bd6 14.e4 Rfd8 15.Nh4; 10.c3 Qb6 11.Nbd2 Qc7 12.c4 a5 13.Qc2 Ra7 14.Ne4 Rfa8 15.h3) 10...a5 11.Nc3 Qc7 12.h3 Rfe8 13.Ne4 Nb6 14.Nc3 d5 15.b5; B) 9...c5 10.c4 (10.Nbd2 Qb6 11.Nc4 Qc7 12.e4 Rfe8 13.Ne3 d5 14.ed5 Nd5 15.Nd5) 10...d5 11.cd5 Bd5 12.Nbd2 cb4 13.ab4 Bb4 14.e4 Bc6 15.Ne5; C) 9...a5 10.b5 (10.Nc3 d5 11.b5 c5 12.bc6 bc6 13.Rb1 Qc7 14.h3 Rab8 15.Na4; 10.Qd2 ab4 11.ab4 Ra1 12.Ba1 c6 13.Na3 Qc7 14.c4 Ra8 15.Bb2; 10.c4 ab4 11.ab4 Ra1 12.Ba1 c6 13.Nc3 Qb6 14.Qa4 Qc7 15.Bb2; 10.Nbd2 Nb6 11.c4 ab4 12.ab4 Ra1 13.Qa1 Qa8 14.e4 Na4 15.d4) 10...c6 11.Nc3 d5 12.h3 Qc7 13.Qd2 c5 14.Qc1 Nb6 15.a4.

9.h3 A) 9...Nb6 10.Nc3 c6 11.d3 Nfd5 12.Nd5 cd5 13.a4 Qe8 14.c3 a5 15.b5; B) 9...a5 10.b5 (10.c4 ab4 11.ab4 Ra1 12.Ba1 Nb6 13.Qb3 Qd7 14.Nc3 Ra8 15.Bb2; 10.Nc3 d5 11.b5 Bd6 12.Na4 Qe7 13.d3 c6 14.bc6 bc6 15.Rb1) 10...Nb6 11.Nc3 Nfd5 12.Nd5 Bd5 13.a4 Nc4 14.Bc4 Bc4 15.e4; C) 9...c5 10.bc5 Nc5 11.Nc3 Nce4 12.Ne4 Ne4 13.c4 Bf5 14.d3 Nc5 15.d4; D) 9...a6 10.c4 (10.Nc3 c6 11.d3 Qc7 12.Ne4 Ne4 13.de4 Nb6 14.a4 a5 15.Qd2; 10.d3 a5 11.b5 c6 12.Nc3 Qc7 13.Rb1 d5 14.Qd2 c5 15.a4; 10.Qc1 c6 11.Nc3 Qc7 12.a4 d5 13.Ba3 Bd6 14.a5 d4 15.Nd1) 10...c5 11.bc5 Nc5 12.Nc3 Qb6 13.Ra2 Rac8 14.d4 Ncd7 15.Nd2; E) 9...c6 10.c4 (10.d3 a5 11.Nbd2 ab4 12.ab4 Nd5 13.Ra8 Qa8 14.c4 Nb4 15.Qb3) 10...c5 11.bc5 Nc5 12.Nc3 Qb6 13.Rb1 Bf5 14.d3 Qc6 15.e4.

5.a3 Be7

6.d3 0–0 7.c4 Nbd7 8.Nbd2 c6 9.Be2 Ne8 10.0–0 f5 11.Qc2 Bf6 12.Rac1 Nc7 13.e4 f4 14.d4 White prepares c5 14...Bg4 15.de5 de5 16.h3 Bh5 17.Rfe1 Qe7 18.c5 Kh8 (18...Bf7 19.Red1+=) 19.Nc4 g5 (19...Bf3!? 20.Bf3 Nb5+/–) 20.Rcd1 g4 21.hg4 Bg4 22.Nh2 Be2 23.Qe2 Rg8 24.f3 Bh4?? (24...Raf8 25.Ng4 Ne8 26.Rd2+/–) 25.Rf1 (better is 25.Rd7 Qe6 26.Be5 Bf6 27.Bf6 Qf6 28.Rc7+–) 25...Rg3? (better is 25...Bf6!?+/–) 26.Ng4 Rg8?? (26...Rg4 27.fg4 Bf6+–) 27.Nce5 (better is 27.Rd7 Qd7 28.Nce5 R8g4 29.Nd7 Rg7 30.Qd2+–) 27...Ne5 28.Be5 (28.Ne5?! Bf6 29.Rd7 Rg2 30.Qg2 Rg2 31.Kg2 Qd7 32.Nd7 Bb2+–) 28...Bf6 (28...Rg7 29.Bf4 R3g4 30.fg4 Ne8+–) 29.Bf6 (29.Bf6 Qf6 30.Nf6 Rg2 31.Qg2 Rg2 32.Kg2+–; 29.Nf6?! Rg2 30.Qg2 Rg2 31.Kg2 Qe5+/–) 1–0. Fournier,Frederic (1650) – gatofelix (1625), Active, 2006.

6.d3 0–0 7.c4 Nbd7 8.Be2 c5 9.b5 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 b6 13.Qa4 Nh5 14.0–0 f5 15.Nbd2 Ndf6 16.Bc3 Qe8 17.g3 Qg6 18.Nh4 Qg5 19.Ndf3 Qg4?? (19...Qh6 20.Ng2=) 20.Kg2?? (better is 20.Nd4! cd4 21.Bg4 Ng4 22.ed4 Bh4 23.gh4+–) 20...f4= 21.Ng1 Nd7?? (better is 21...Qg5=) 22.Bg4+– Bg4 23.h3 Bh3 (23...Be6 24.Nhf3 fe3 25.fe3 Kh8+–) 24.Nh3 fg3 25.fg3 (better is 25.Qa7 Rd8 26.Nf5 Bf6 27.fg3 d5+–) 25...Bh4 (25...Rf1 26.Kf1 Ng3 27.Kg2 Bh4+–) 26.Rf8 (26.Rf8 Kf8 27.Qa8 Ke7 28.gh4+–) 1–0. Fournier,Frederic – bellard jynckx, Partie amicale, 0m + 5s, 2008.

6.d3 0–0 7.c4 Nbd7 8.Be2 Ne8 9.Nbd2 f5 10.0–0 f4 11.e4 g5 12.h3 h5 13.Nh2 g4 14.hg4 hg4 15.Bg4 Bg4 16.Qg4 Ng7 17.Ndf3 Rf6 (17...Kf7!? 18.Ne1 Nf6+/–) 18.Nh4 Rh6 19.Nf5 Rh5?? (better is 19...Rh7+–) 20.Qg7 1–0. Fournier,Frederic (2025) – Amarante (2000), Echecs21, 2003.

6.Be2 0–0 7.0–0 h6 (7...a5 8.d4 ab4 9.de5 de5 10.Ne5=) 8.d3 (8.d4 e4 9.Nfd2 a5=) 8...c6 (8...a5 9.d4 e4 10.Nfd2+=) 9.e4 (9.c4 b5=) 9...Nbd7 10.Nbd2 b5 (10...a5 11.ba5 Qa5 12.d4=) 11.d4 ed4 (11...a5 12.a4 ab4 13.ab5 Ra1 14.Ba1 cb5 15.de5 de5 16.Ne5=) 12.Nd4 Qc7 13.f4 (13.a4 ba4 14.Ne6 fe6 15.Ra4 d5+=) 13...Nb6 (13...a5 14.f5 Bc4 15.Nc4 bc4 16.Bc4 ab4 17.ab4 Ne4 18.Qg4=) 14.Ne6 fe6 15.e5 Nfd5 16.ed6 (16.Bg4 Nf4 17.g3 h5=) 16...Bd6 Can f4 get defended? (16...Qd6 17.Be5 Qd7 18.c4–/+) 17.Qe1 (17.g3!?=) 17...Ne3 18.Bd3 (18.Bb5 Bf4 19.Rf4 Rf4 20.Qe3 Rf7+–) 18...Nf1 19.Qe6 Qf7 20.Qe4 Do you see the mate threat? 20...g6 (20...Bc5 21.bc5 g6+–) 21.Rf1= Na4 (21...Nd5 22.c4 bc4 23.Qg6 Qg6 24.Bg6 c3 25.Bc3 Bf4–+) 22.Ba1 (worse is 22.Qc6 Nb2 23.Qd6 Rad8–/+) 22...Bc7 23.Qc6 Rac8 24.Bg6 (24.Qb5 Nc3 25.Qa6 Bb6 26.Kh1 Qe6+/–) 24...Bb6 25.Qb6 Nb6 26.Bf7 Rf7 27.Ne4 Rc2 28.Bd4 (better is 28.Nd6!? Rfc7 29.Nb5+/–) 28...Nc4= 29.Rf3 Rc1 (29...Re7 30.Nc5 Re1 31.Rf1 Ree2–/+) 30.Kf2+= Rc2 (30...Rd1 31.Nf6 Kf8 32.Bc5 Kg7 33.Ne4=) 31.Kg3 Ra2 32.Kh3 (32.Nc3!? Ra3 33.Nb5+=) 32...Ra3= (32...Na3 33.Rg3 Kf8 34.Bc5 Re7 35.Be7 Ke7 36.Rg7 Kf8 37.Ra7+–) 33.Ra3 Na3 34.Kg4 (34.Nf6 Kg7 35.g4 Rf6+/–) 34...a6 (34...Nc4 35.Nc5=) 35.Nf6 (35.Nd6 Rd7 36.Nf5 Kh7+=) 35...Kf8 36.Bc5 Kg7 37.Nh5 (37.Ne8!? Kg6 38.Nd6 h5 39.Kf3=) 37...Kg6 38.Ng3 Nc4 39.f5 Kh7 40.Ne4 (40.Bd4!?=) 40...Ne5–/+ 41.Kf4 Nd3 42.Kg4 Nc5 (42...Rg7!? 43.Kf3 Ne1 44.Ke2 Ng2 45.Nf6 Kh8+=) 43.Nc5= Ra7 44.Kf4 a5 45.ba5 Ra5 46.g4 b4 47.Nb3 (47.Ne6 b3 48.Ke4 b2–+) 47...Ra3 48.Nd2 (48.Nd4 b3 49.Ne6 b2–+) 48...b3–/+ 49.Ke5 (49.Nc4 Ra4 50.h3 b2–+) 49...b2 50.h4 (50.Nb1 Ra1 51.Kd4 Rb1 52.Kc3–+) 50...Ra1 51.f6 Rd1 (51...Rd1 52.g5 Rd2–+) 0–1. Moeseneder,Christian – Krueger,Heiner, GER–chJ NRW, 1996.

6.Be2 a5 =.

6.Be2 Nbd7 7.0–0 0–0 8.Nc3 a6 9.e4 b5 10.Re1 (10.Ng5 c5=) 10...Rc8 (10...c5 11.Qc1 (11.Qb1 h6 12.d3 Qc7 13.Qc1 Rfe8 14.Qe3 cb4 15.ab4 d5 16.ed5–/+; 11.Ng5= Qc7 12.d3 Qc6 13.Qd2 h6 14.Ne6 fe6 15.Nd1 Rac8 16.Ne3=) 11...Qc7 12.Ng5 cb4 13.ab4 d5 14.ed5 Bd5 15.Nd5 Nd5 16.Bf3+=; 10...c6 11.d4 Qc7 12.d5 cd5 13.ed5 Bg4 14.a4 ba4 15.Ra4 Bf3 16.gf3=) 11.Bd3 (11.d4 ed4 (11...c6= 12.d5 cd5 13.ed5 Bf5 14.Nh4 Nd5 15.Nf5 Nc3 16.Bc3=) 12.Nd4 c5 13.Ne6 fe6 14.Qd3 Qe8 15.Rad1 Qf7 16.Qh3=; 11.a4 a5 12.d4 ab4 13.Nb5 Ne4 14.Na7 Ra8 15.Nc6 Qe8 16.Bb5+=; 11.Ng5 c6 12.Ne6 fe6 13.d4 ed4 14.Qd4 c5 15.Qe3 Qe8 16.Rad1=) 11...c5 12.bc5 (12.Ng5 Nb6 (12...Qc7= 13.Ne6 fe6 14.Qf3 c4 15.Be2 Qc6 16.Qh3=) 13.Ne6 fe6 14.Qf3 Qe8 15.Qh3 Qf7 16.bc5+=) 12...Nc5+= 13.Nd5? (better is 13.Bf1+= Bg4 14.Be2 Nfe4 15.Ne4 Ne4 16.Ne5+=) 13...Nd5–+ 14.ed5 Bd5 (14...Nd3 15.cd3 Bd5 16.Bc3–+) 15.Qe2? (15.Bf5 Rc7–+) 15...Nd3 (better is 15...e4 16.Nd4 f5 (16...Nd3 17.cd3 Bf6 18.de4+=; 16...ed3?! 17.Qe7 Na4 18.Bc3–+) 17.Bb5 ab5–+) 16.Qd3–/+ Be6 17.Qe3 (17.a4 b4–+) 17...Rc4 (17...Rc2 18.Bc3–+) 18.d3 (18.c3 Bd5–+) 18...Rg4 (18...Rc2!? 19.Re2 Re2 20.Qe2–+) 19.h3 (19.d4 f6–/+) 19...Rg6–+ 20.Bc1 (20.Kh2–+) 20...Bh3 21.g3 (21.Nh4 Bh4 22.Qh3 Qf6–+) 21...Qd7 (21...f5 22.d4 f4 23.Qb3 Kh8 24.Kh2 fg3 25.fg3–+) 22.d4 Bg4 23.de5 Bf3 24.Qf3 Qh3 (24...de5 25.Bb2–+) 25.Qg2 (25.Qb7 Bh4 26.Bf4 de5 27.Be5 Bf6 28.Bf6 Rf6–+ (28...gf6?! 29.Qa6 Rc8 30.Rac1=)) 25...Qe6 (25...Qg2!? 26.Kg2 de5 27.Bb2–+) 26.Bf4 de5 27.Re5 Qd7 28.Rae1 (28.Re2 Re6 29.Qf1 Bc5–+) 28...Bd6 (28...Ba3 29.Qe4–+) 29.Rd5 h6?? (29...Qc6 30.Bd6 Rd6 31.Rd3–+) 30.Bd6?? (better is 30.Red1+–) 30...Rd6–+ 31.Rd6 Qd6 32.Qf1 Rd8 33.Qe2 Qd2 34.c3 Qe2 35.Re2 Rd3 36.Re3? Re3 37.fe3 Kf8 38.Kf2 Ke7 39.Ke2 Kd6 40.Kd3 Kc5 41.e4 f6 42.Ke3 h5 43.Kd3 g5 44.Ke3 Kc4 45.Kd2 h4 46.gh4 gh4 47.Ke2 Kc3 48.Kf2 Kb3 49.Kf3 Ka3 50.Kg4 h3! 51.Kh3 b4 52.Kg4 b3 53.Kf5 b2 54.Kf6 b1Q 55.e5 0–1. Nautiluschess – HARDHEAD, ICS blitz, 2001.

6.Be2 Nbd7 7.0–0 0–0 8.d3 h5 (8...a5 9.c4=) 9.e4 (9.c4 c5+=) 9...Ng4 (9...a5 10.b5=) 10.h3+= Ngf6 11.Nbd2 (11.Ng5 g6+=) 11...Nb6 12.c4 Qd7 13.Re1 (better is 13.b5+=) 13...Bh3 (better is 13...Na4 14.Qc1 Nb2 15.Qb2 Rfe8=) 14.gh3+/– Qh3 (14...Na4 15.Qb1 Qh3 16.d4+/–) 15.Ng5 Qd7 (15...Qh4 16.Ndf3 Qg4 17.Kh1+–) 16.Ndf3 (16.Bh5 Na4 17.Rb1 Nb2 18.Rb2 g6+–) 16...Ng4 (16...Na4 17.Bc1+/–) 17.Qd2 (17.d4 Bg5 18.Ng5 f6+–) 17...f6 18.Nh3 Nh6 (better is 18...f5+/–) 19.d4?? (better is 19.Kg2+–) 19...Qh3–/+ 20.de5 (better is 20.c5!? dc5 21.bc5–+) 20...fe5–+ 21.Qd3 Ng4 22.Bf1 (22.Be5 de5 (22...Ne5?! 23.Ne5 Qe6 24.Nf3–+) 23.Bf1 Qf3 24.Qf3 Rf3–+) 22...Nf2 (better is 22...Qf3 23.Qf3 Rf3–+) 23.Kf2 Qh2 24.Bg2 Bh4 25.Kf1 Rf3! (worse is 25...Be1 26.c5 Na4 27.Re1–+) 26.Bf3 (26.Qf3 Be1 Zwischenzug; 26.Bf3 Qf2 Mate attack) 26...Qf2 (26...Qb2?! 27.Qe2 Qe2 28.Re2–+ (28.Be2?? Be1 29.Re1 h4–+)) 0–1. pieeater – epasacrifice, ChessWorld.net, 2011.

6.Be2 Nbd7 7.0–0 0–0 8.Ng5 Bf5 =.

6.Ng5 Qc8 7.Nc3 (7.Ne6 Qe6 8.d4 0–0=) 7...0–0 (7...Bg4 8.f3 Bd7 9.f4=) 8.Be2 (8.Ne6 Qe6 9.Qf3 d5=) 8...Bg4 9.f3 Bd7 (9...Bh5 10.0–0=) 10.0–0 Ne8 (10...d5 11.d4 ed4 12.Qd4+= (worse is 12.ed4 h6–/+)) 11.f4 (11.Nge4 f5 12.Ng3 Bh4=) 11...Bg5= 12.fg5 g6 (better is 12...Qd8!?=) 13.Qe1 Bg4 (13...f5 14.Qg3+/–) 14.Bd3 (14.Nd5 Qd7+/–) 14...Qd8 (14...Be6 15.Qh4+/–) 15.Qh4 (15.Qg3 Be6+/–) 15...Be6 16.Rf2 Ng7 (16...Nd7 17.Raf1+/–) 17.Raf1 Bf5 (17...Nd7!?+/–) 18.Nd5 Nd7 19.Rf5 Nf5 (19...gf5 20.Nf6 Nf6 21.gf6 Nh5 22.Rf5 Qf6 23.Rf6 Nf6 24.Qg5 Kh8 25.Qf6 Kg8+–) 20.Rf5 (20.Bf5 c6 21.Bd7 cd5+–) 20...c6 (20...h5+–) 21.Nf6 Nf6 22.gf6 Qe8 23.Qh6 e4 (23...gf5 24.Qg7) 24.Qg7 1–0. Fiedler,Peter – Wakeham,Marc, O–G7.26 ETC, 2004.

6.Ng5 Bf5 7.Qf3 Bc2 8.Qb7 =.

5.b5 Be7

6.Nc3 0–0 =.

6.c4 0–0+= 7.Be2 h6 (7...a6 8.ba6 Na6 9.0–0+=) 8.0–0 (8.d4 e4 9.Nfd2 a6=) 8...Nbd7 (8...a6 9.a4=) 9.a4 (9.d4 e4 10.Nfd2 c6=) 9...Nc5 (9...a6 10.Nc3=) 10.d4 ed4 11.Nd4 (worse is 11.Qd4 Nb3 12.Qd3 Na1 13.Ba1 a6–/+) 11...Qd7 12.Ne6 (12.a5 a6+=) 12...fe6 13.Nd2 e5 14.Nb3 Nb3 15.Qb3 b6 (15...Qe6 16.a5+=) 16.c5 Kh8 17.c6 Qf5 18.f4 e4 19.h3 (19.a5 Kh7+/–) 19...h5 (19...Qg6 20.Rad1+=) 20.Rf2 (20.a5 ba5 21.Ra5 d5+/–) 20...h4 21.Bc3 (21.a5 Kh7+/–) 21...Nd5 (21...Kh7 22.Rd1+/–) 22.Bg4 (22.Bd4 Nf6+/–) 22...Qf7 23.Bb2 (23.Be1 Bf6 24.Rd1 Ne7 25.Qf7 Rf7+/–) 23...Bf6 (23...a5 24.Rd2 Nb4 25.Qf7 Rf7 26.Rad1+=) 24.Rd1 (better is 24.a5+/–) 24...Ne3? (better is 24...Ne7 25.Qf7 Rf7+=) 25.Qe3+– Bb2 26.Rb2 d5 (26...Qf4 27.Qe1 Qg3 28.Qg3 hg3+–) 27.Rbd2 Rad8 28.Qf2 (28.Qe1 Rd6+–) 28...Qf4 (28...Kg8 29.Qh4 Rd6 30.Qg5 Qf4 31.Rd5 Qg5 32.Rg5 Rd1 33.Bd1+–) 29.Qh4 (29.Qh4 Qh6 30.Qh6 gh6 31.Rd5 Rd5 32.Rd5+–) 1–0. Schwetlick – Mundt, Binz, 1994.

6.Be2 0–0 7.0–0 a6 8.d4 e4 9.Ng5+=.

6.Be2 0–0 7.0–0 Nbd7 8.a4 (8.Ng5 Bf5=) 8...c6 9.c4 (9.Ng5 Bf5=) 9...cb5 10.ab5 Qc7 (10...d5 11.Qc2=) 11.d3 (11.d4 Bc4 12.Qc2 Rfc8=) 11...a6 (11...d5 12.Nbd2=) 12.Nc3 ab5 (12...h6 13.Qd2=) 13.Nb5 Qb6 14.Qd2 (14.d4 e4 15.Ng5 Bf5+=) 14...Nc5 15.Qc2 (15.Qb4 Rfc8=) 15...Bf5 16.e4 (16.Nh4 Be6+=) 16...Bg6 (16...Bd7 17.Rfb1=) 17.Nh4 Bh5 (17...Ra6!?+=) 18.Bh5 Nh5 19.Nf5 Rae8 (19...Bf6 20.Ra8 Ra8 21.Bc1+=) 20.d4+– (20.Ne7?! Re7 21.Bc1 Qc6+/–) 20...Nd7 (20...ed4 21.Bd4 (21.Nfd4?! Bf6+=; 21.Nbd4?! Bf6+=; 21.Ne7?! Re7 22.Bd4 Qc6+=) 21...Bf6 22.Rfd1 Bd4 A) 23.Nbd4?! Re4 24.Nb5 Qc6+=; B) 23.Nfd4?! Ne4 (worse is 23...Re4 24.Nf3 Qd8 25.Nd6+–) 24.Nf5 Nf4=; C) 23.Rd4+–) 21.Rfb1 (21.Ba3 ed4 22.Ne7 Re7 23.Bd6 Re5+–) 21...g6 (21...ed4 22.Rd1 Ne5 23.Rd4 Nf4+–) 22.Ne7 Re7 23.Ba3 ed4 (23...Ra8 24.d5 Nf4 25.g3+–) 24.Bd6 Rfe8 (24...Re5 25.Be5 Ne5 26.c5+–) 25.Be7 Re7 26.Nc3 (26.Rd1 Nhf6 27.Rd4 Qc6+–) 26...Qd6 (26...Qc6 27.Nd5 Re6 28.Rd1+–) 27.Nd5 (27.Ra8 Kg7 28.Nd5 Re6 29.Rb7 Nc5+–) 27...Re6 (27...Re8 28.Rb7 Nc5 29.Rb6+–) 28.Rb7 (28.Ra8 Kg7 29.Rd8 Qc6+–) 28...Nc5 29.Rb6 (29.Rc7 Nf6 30.Qb2 Nd5 31.Rc8 Kg7 32.cd5 Re4+–) 29...Qe5 30.Re6 Ne6 (30...fe6 31.Qa2 Qb8 32.Ne7 Kg7 33.Nc6+–) 31.f3 (31.Ra5 Kg7+–) 31...Kg7 32.Rd1 Nc5 33.Qf2 Ne6 34.c5 (34.Qd2 Nhf4+–) 34...Nhf4 35.Nf4 Nf4 36.c6 Qc5 (36...Ne6+–) 37.Qd4 Qd4 38.Rd4 Ne6 39.Rd6 Kf8 (39...Nc7 40.Rd7 Ne6 41.e5+–) 40.Kf2 (better is 40.Re6 fe6 41.c7+–) 40...Ke7 41.Rd1 (41.Rd7 Ke8+–) 41...Nd8 (41...Ke8+–) 42.c7 (42.c7 Ne6 43.c8Q+–) 1–0. Genne,Rene – Keysener,Philippe, Zuerich op2, 1993.

6.Be2 0–0 7.0–0 Nbd7 8.d3 (8.Ng5 Bf5=) 8...h6 9.c4 c6 (9...a6 10.a4+=) 10.a4 Qc7 11.Nbd2 Rfc8 (11...a6 12.bc6 bc6 13.Qc2=) 12.Qb3 (12.Qc2 a6 13.bc6 bc6+=) 12...Nc5 13.Qc2 Bd7 (13...Bf5 14.e4 Bh7 15.Nb3=) 14.d4 ed4 15.ed4 Ne6 16.Qb3 (16.bc6 Bc6 17.Rfe1 Re8=) 16...d5 (16...Nf4 17.Rfe1+=) 17.cd5 (17.Ne5 Bd6 18.Qg3 Bb4 19.cd5 cd5+=) 17...Nd5 (17...Nf4 18.Rfe1 Ne2 19.Re2 Nd5 20.bc6 bc6 21.Ne5+=) 18.Rac1 (18.Bc4 Nb6 19.bc6 bc6= (19...Qc6? 20.d5 Qd6 21.de6 Be6 22.Be6 Qe6 23.Qe6 fe6 24.Bd4+–)) 18...Qd8 (18...Nef4!? 19.Bc4 Qa5=) 19.Ne5= Nef4 20.Bc4 (20.Bf3=) 20...Bd6 (20...Be6!?=) 21.g3 (21.Ne4 Be7 22.Qf3 Be6 23.bc6 Rab8 24.cb7 Rb7+/–) 21...Nh3+= 22.Kh1 Ng5 (22...Be6 23.Ne4+=) 23.f4 Nh7 (23...Nh3+/–) 24.f5 (24.Ne4!? Bf5 25.Nd6 Qd6 26.Ba3+/–) 24...Be7 (24...Nhf6 25.Qf3+=) 25.Bd5 (25.Ne4!? Nhf6 26.Rce1+/–) 25...cd5+= 26.Qd5?? (better is 26.Ne4! Rc1 27.Bc1=) 26...Bc6–+ 27.Qc6 bc6 (27...Rc6 28.bc6 bc6 29.Nc6 (29.Rc6? Qd5 30.Ndf3 Ng5–+) 29...Qd5 30.Nf3–/+) 28.Nc6 Qd5 29.Kg1 Bg5 30.h4 Rc6 (30...Rc6 31.hg5 Rc1 32.Rc1 Ng5–+) 0–1. Nikolic,Jovane (1765) – Correia,Vitor Paie, Rio Claro BRA, Open, 2014.

6.Be2 0–0 7.0–0 h6 8.Nc3=.

6.Ng5 Bg4 7.Be2 Be2 8.Qe2 Qd7 =.

5.Be2 Nbd7

6.0–0 d5 7.Ne5 Ne5 8.Be5 Bb4 9.Nc3 =.

6.0–0 Be7 7.Nc3 d5 8.a3 0–0 (8...a5 9.b5=) 9.Rc1 (9.Ng5 c5=) 9...c6 (9...a5 10.b5+=) 10.d3 (10.Ng5 Qc7=) 10...Bd6 (10...a5 11.b5+=) 11.h3 (11.Ng5 b5+=) 11...a5 (11...Qe7 12.Ra1–/+) 12.b5+= h6 13.Nd2 (13.a4 c5+=) 13...Qc7 (13...Qb6 14.d4+=) 14.a4 (14.d4 e4+=) 14...Bb4 (14...c5 15.Re1+=) 15.bc6 (15.Na2 cb5 16.Nb4 ab4 17.ab5 Ra2=) 15...Bc3 16.Bc3 Qc6 (worse is 16...bc6 17.d4 ed4 18.Bd4=) 17.Bb2 Qa4 18.Nb3 (18.f4 ef4 19.ef4 Bf5+=) 18...Qc6 19.f4 ef4 20.ef4 Bf5 (20...a4 21.Nd4 Qb6 22.Rb1–/+) 21.g4 Bh7 (21...Bg6 22.g5 hg5 23.fg5–/+) 22.g5 hg5 23.fg5 Ne8 24.Bd4 (24.Ba3!? Nd6 25.c4+=) 24...Nd6 (24...a4 25.Nd2–/+) 25.Bg4 (25.Bf2 Nf5–/+) 25...Nb5 (25...a4 26.Nd2–/+) 26.Ba1 (26.Bb2 a4 27.c4 Nc7 28.cd5 Qd6–/+) 26...Qb6 (26...a4 27.Nd4 Qc5 28.Bd7 Nd4 29.Kg2–+) 27.Kh1 (27.Kg2 Nc5–/+) 27...Qd6 (27...Nb8 28.c4 dc4 29.dc4–/+) 28.c4 Nc7 29.c5 Qe7 30.Re1 Qd8 (30...Ne6 31.Bc3–/+) 31.Nd4 (31.Qd2 f5 32.Bh5 a4+/–) 31...Nb8 (31...Na6 32.c6 Ndc5 33.Qd2–/+) 32.Qd2+= Nc6 (32...a4 33.Rb1 Ra7 34.Kg2+=) 33.Rb1 (33.Bc3 a4+=) 33...Nb4–/+ 34.Bf5 Bf5 35.Nf5 Ne6 (35...Qd7 36.Qf2 Rfe8 37.Bg7 Re1 38.Re1 Re8+–) 36.g6 (36.Bg7 Qg5 37.Qg5 Ng5 38.Bf8 Kf8 39.Re3+/–) 36...Qg5 (better is 36...fg6!? 37.Re6 Rf5 (37...gf5?? 38.Rg1 Qd7 39.Rg7 Qg7 40.Bg7+–) 38.Rg6 d4–/+) 37.Qg5 (37.Re5 Kh8 (37...Qd2?? 38.Ne7 Kh8 39.Rh5 Qh6 40.Rh6) 38.Qg5 Ng5+–) 37...Ng5= 38.Ng7?? (38.Re7 Nd3 39.Bg7+–) 38...Nd3 (38...Nh3 39.Nf5 fg6 40.Ne7 Kh7 41.Nd5 Nd5 42.Rb7 Kh6 43.Bg7 Kg5 44.Bf8 Rf8 45.Ra1–+) 39.Re7 Nc5?? 40.Nf5+– Threatening mate: Nh6 40...f6 41.h4 Nf7 42.Bf6 Rab8 43.Rg1 1–0. Margraf,A – Winterkamp,S, Schwaben, 1988.

6.0–0 Be7 7.Ng5 0–0 8.Ne6 fe6 9.a3 c6 10.Bc4 d5 11.Bb3 (11.Be2 Qc7=) 11...Bd6 (11...a5 12.ba5 Qa5 13.Qf3+=) 12.d3 (12.c4 e4=) 12...Kh8 (12...a5 13.ba5 Qa5 14.Qf3+=) 13.Nd2 Qc7 14.e4 Rae8 (14...a5 15.ba5 Ra5 16.Qe2=) 15.c4 Rf7 16.c5 Bf8 17.Qc2 g6 18.Rfe1 Bg7 19.Nf3 Ng4 20.h3 Nh6 21.Ng5 Rff8 22.Nf3 Re7 (22...Rf7!?=) 23.Re2 Rfe8 24.Rae1 Nf7 25.Qb1 Nf6 26.Nd2 Nh5 27.g3 Ng5 28.h4 Nf7 29.Nf3 Nh6 30.Nh2 Nf7 31.Nf3 h6 (better is 31...Nh6!?=) 32.Bc1 Nf6 33.Bd2 Ng4 34.Nh2 Nh2 35.Kh2 Kh7 36.f4 ef4 37.Bf4 e5 38.Bd2 d4 39.Rf2 Qd7 40.Qd1 h5 41.Ref1 Nh6 42.Bh6 Kh6 (better is 42...Bh6 43.Kg2 Rg7+/–) 43.Rf7?? (43.Bf7 Kh7 44.Be8 Qe8+–) 43...b6? (better is 43...Rf7!? 44.Bf7 Rf8 45.Qc1 Kh7 46.Bg6 Kg6 47.Qg5 Kh7 48.Rf8 Bf8 49.Qh5 Kg8 50.Qe5 b6+=) 44.cb6 ab6 45.Qc2 (45.Qd2 Kh7 46.Qg5 Rf7 47.Bf7 Re6 48.Be6 Qe6+–) 45...Qc7? (better is 45...Kh7+=) 46.Qd2+– Kh7 47.Qg5 Rf7?? (47...Qd7+–) 48.Rf7 Qd6+= ½–½. Abrahamyan,Arsen – Richter,Leonard, GER–chT U12 Leipzig, 2008.

6.0–0 g6 7.c4 (7.Ng5 Bg7=) 7...c5 (7...Bg7 8.d4+=) 8.b5 (8.bc5!? Nc5 9.d4+/–) 8...Bg7= 9.a4 (9.d4 cd4 10.ed4 Qc7=) 9...0–0 10.d3 Nh5 (10...Qe7 11.a5=) 11.Nfd2 (better is 11.Nc3+=) 11...Ndf6 (11...Nhf6 12.Nc3+=) 12.Nc3 (12.g4 Ne8 13.gh5 Bh3+–) 12...d5 (12...Qd7 13.h3 Bh8 14.a5+=) 13.cd5+/– Nd5 14.Nd5 (14.Nce4 Rc8 15.Nc4 f5+=) 14...Bd5 (14...Qd5 15.Nc4 f5+/–) 15.Nc4 (15.Bh5 gh5 16.Qh5 f6+/–) 15...f5 (15...Qg5 16.g3=) 16.Qc2 (16.Be5 Re8 17.Bg7 Ng7+/–) 16...Qe7 (16...Qg5 17.g3 f4 18.e4 fg3 19.fg3 (19.ed5 gf2 20.Kh1 Ng3 21.Kg2 Nf1 22.Kh3 Rf4 23.Rf1 Rh4) 19...Ng3 20.hg3 Qg3 21.Kh1 Qh3 22.Kg1 Qg3 23.Kh1 Qh3 24.Kg1 Qg3=) 17.Rfd1 (17.Bh5 gh5 18.e4 fe4 19.de4 Bf7+/–) 17...b6 (17...Qg5 18.Bf1+=) 18.Rab1 (18.Bh5 gh5 19.e4 Bb7+/–) 18...Rf7 (18...Qg5 19.Bf1=) 19.Bf1 (19.Bh5 gh5 20.e4 Bc4 21.dc4 Raf8+/–) 19...Raf8 (19...Qe6 20.a5+=) 20.f3 (20.a5 f4+=) 20...Qg5= 21.Qe2 e4 (21...Re7 22.a5=) 22.f4+= Qe7 23.Qe1 (23.de4 Be4 24.Rbc1+=) 23...Nf6 (23...Qe6 24.Bg7 Rg7 25.Ne5 ed3 26.Rd3+=) 24.d4 (24.Ne5+/–) 24...Nd7? (better is 24...cd4 25.Ba3 Qe6 26.Bf8 Rf8 (26...Bc4? 27.Bc4 Qc4 28.Rd4+–) 27.Rd4 Ng4 28.Rd5 Qd5+=) 25.dc5+– Qc5?? (better is 25...Bb2 26.Rd5 Bg7+–) 26.Ba3 Qc8 27.Rd5 Rd8 (27...Qa8 28.Rbd1 Nc5 29.Bc5 bc5 30.Ne5 Be5 31.Re5+–) 28.Nd6 (28.Nd6 Qc7 29.Bc4+–) 1–0. Bedbur,Heinz – Probst,Dieter, corr, 1990.

5.Be2 Be7

6.0–0 0–0 7.a3 =.

6.0–0 Na6 7.b5 (7.Ba6 ba6 8.Ng5 Bd7=) 7...Nc5 (7...Nb4 8.a3 Nbd5 9.d4=) 8.Nc3 0–0 9.a4 b6 (9...Bf5 10.a5=) 10.Bc4?? (better is 10.d4 Ncd7 11.d5+=) ½–½. Wartenberg,Erwin – Berg,Juergen, RH–op Mainz, 1996.

6.0–0 Nc6 7.b5 Na5 8.Ng5 =.

6.0–0 d5 7.b5 e4 8.Nd4 Bd7 9.a4 a5 10.d3 c5 11.Nb3 b6 12.de4 de4 13.N1d2 Bd6 (13...0–0 14.f3+=) 14.g3 (14.Nc4 Bc7+/–) 14...Bh3 (14...Bf5 15.g4 Bg6 16.f4 ef3 17.Bf3+=) 15.Re1 (15.Bf6 gf6 16.Ne4 Be5 17.Qd8 Kd8 18.Rfd1 Nd7+–) 15...Qd7? (15...Be7 16.c4 Qd7 17.f3+=) 16.f3 (16.Bf6 gf6 17.Ne4 Be5+–) 16...Qc7 (16...Be7 17.Ne4 Ne4 18.fe4+=) 17.f4 (17.Bf6!? gf6 18.Ne4+–) 17...Nbd7+/– 18.Bf1 (better is 18.Ne4 Ne4 19.Bf3+/–) 18...0–0?? (better is 18...Bf1 19.Rf1 0–0=) 19.Bh3+– Rae8 20.Bd7 Qd7 (20...Nd7 21.Qg4 g6 22.Nc4+–) 21.Nc4 (better is 21.Bf6 gf6 22.Nc4 Rd8 23.Nb6 Qe6+–) 21...Qh3 (21...Qe6 22.Nb6 Be7 23.Bf6 Bf6+–) 22.Nd6 Ng4 23.Qe2 Rd8 (23...Re6 24.Rad1+–) 24.Ne4 Rfe8 (24...Qh5 25.Ng5+–) 25.Ng5 Qh6 (25...Qh5 26.h3 Nf6 27.Bf6 Qe2 28.Re2 gf6 29.Nf3+–) 26.Qg4 Qd6 27.Ne6! fe6 28.Qg7 1–0. Valpa – Idris, playchess.de, 2006.

6.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.Nf3 Be7 6.Be2).

6.d4 Nbd7 =.

6.d4 e4 7.Nfd2 d5 8.a3 Nbd7 (8...a5 9.b5+=) 9.0–0 (9.c4 dc4 10.0–0 a5=) 9...0–0 (9...a5 10.ba5 Ra5 11.c4=) 10.c4= c6 (10...dc4 11.Nc4 Nd5 12.Qc2=) 11.c5 (11.Nc3 Re8=) 11...Ne8 (11...b6 12.Nc3=) 12.f3 f5 13.fe4 (13.Nc3 Bg5 14.f4 Bf6=) 13...fe4 14.Bg4 (14.Rf8 Bf8 15.Qb3 Nc7=) 14...Rf1+= 15.Kf1 (15.Nf1 Bg4 16.Qg4 Nc7+=) 15...Bg4 (better is 15...Nf8+=) 16.Qe1?? (better is 16.Qg4 Nc7 17.Kg1+=) 16...Nef6 (16...Bh4 17.g3 Qf6 18.Kg1–+) 17.h3 (17.Qg3 b6–+) 17...Be6 18.Nc3 Qc7 (better is 18...b6 19.Ne2–+) 19.b5 (19.Kg1–+) 19...Qh2 20.bc6 bc6 21.Ke2 (21.Qf2 Rf8 22.Nf3 ef3 23.gf3 Bh3 24.Ke1 Bg2–+) 21...Qg2 22.Kd1 Qh3 23.Qf1 (23.Nf1 Rf8 24.Ne2 Ng4–+) 23...Qf1 (23...Qe3!? 24.Ne2–+) 24.Nf1 Ng4 25.Ne2 Bg5 26.Bc1 (26.Kd2 Rf8–+) 26...Rb8 (26...Rf8 27.Nf4 Bf4 28.ef4–+) 27.Bd2 (27.Nf4 Kf7–+) 27...Nf2 (27...h5 28.Nf4 Ne3 29.Be3 Bf4 30.Bf4–+) 28.Kc2 Nd3 29.Nc3 (29.Rb1 Rb1 30.Kb1 h5–+) 29...Rb2 30.Kd1 Bg4 31.Ne2 h5 32.Bc1 Be2 0–1. makaveli1982 – kenshirov, internet, 2007.

6.0–0 Nbd7

7.c4 0–0 8.d3 Nb6 9.a4 Bg4 (9...a5 10.b5=) 10.a5 Nbd7 11.Nc3 d5 (11...c6 12.h3 Bh5 13.a6+=) 12.Qb3 (12.Nd5!? Nd5 13.cd5 Bf3 14.Bf3 (worse is 14.gf3 Bb4 15.d4 Bd6=) 14...Bb4 15.a6+=) 12...dc4= 13.dc4 a6 (13...c5 14.b5=) 14.h3 Bf3 15.Bf3 Rb8 (15...c5 16.b5 (16.Bb7?! cb4 17.Ne4 Rb8 18.Nf6 Bf6=) 16...ab5 17.Qb5+/– (17.Nb5?! e4 18.Bg4 Ng4 19.hg4 Qb8=)) 16.Rad1 (16.Rfd1 b6+/–) 16...Qc8 (16...b6 17.ab6 Rb6 18.b5+=) 17.Rd2 (17.c5 c6+/–) 17...Rd8 (17...b6 18.ab6 Rb6 19.b5+=) 18.Rfd1 (18.c5 c6+/–) 18...b6 19.ab6 Rb6 20.Ba3 a5? (better is 20...Bb4 21.Bb4 c5=) 21.b5+– Ba3 22.Qa3 Rd6 23.Qa5 (23.Rd6!? cd6 24.Rd6 Qc4+–) 23...Nb6 24.Rd6 Rd6 25.c5 Nc4?? (25...Rd1 26.Bd1 Nbd7 27.Bg4 Ng4 28.Nd5+/–) 26.Qa8 White prepares the advance c6 (better is 26.Qa2 Rd1 27.Bd1 Ne3 28.fe3+–) 26...Qa8 27.Ba8 Rd1 28.Nd1 Nd7 29.Bd5 Na5 30.c6 Nb6 31.e4 Kf8 32.Ne3 g6 33.Ng4 (33.g3+–) 33...f5? (better is 33...Nac4!? 34.Bc4 Nc4+/–) 34.Ne5+– Ke7 35.Bg8 Kd6 (35...fe4 36.Bh7 Kf6 37.Nd7 (37.Ng6?! Kg7+/–) 37...Nd7 38.cd7+–) 36.Nd7 Nd7 37.cd7 Kd7 38.Bh7 fe4 (38...Nc4 39.Bg6 f4 40.h4+–) 39.Bg6 Kd6 (39...e3 40.fe3 c6 41.b6+–) 40.Be4 c6 (40...Nb3+–) 41.bc6 Nc6 (41...Nb3+–) 42.Bc6 Kc6 43.f4 Kd6 44.Kf2 Ke6 45.g4 Kf6 46.Kf3 Kg6 47.h4 White intends g5 47...Kh6 48.f5 Kg7 49.g5 Kf7 50.Kf4 Kg7 51.Ke5 White prepares f6 51...Kf7 52.h5 White intends g6 52...Kg7 (52...Ke7 53.f6 Kd7 54.g6 Kc6 55.f7 Kb7 56.g7 Ka6 57.g8Q Kb6 58.Qb8 Kc5 59.f8Q Kc4 60.Qb1 Kc3 61.Qfb4) 53.Ke6 Kg8 (53...Kf8 54.f6 Ke8 55.h6 Kd8 56.h7 Kc8 57.h8Q Kb7 58.f7 Kc6 59.Qc8 Kb6 60.f8Q Kb5 61.Qcc5 Ka4 62.Qb4) 54.f6 (54.Ke7 Kh8 55.f6 Kg8 56.g6 Kh8 57.f7 Kg7 58.f8Q) 54...Kf8 55.g6 White prepares the advance f7 (55.f7 Kg7 56.Ke7 Kh7 57.Kf6 Kh8 58.f8Q Kh7 59.g6) 55...Kg8 (55...Ke8 56.g7 Kd8 57.Kd6 Kc8 58.g8Q Kb7 59.Qb3 Kc8 60.f7 Kd8 61.f8Q) 56.Ke7 Kh8 57.f7 1–0. Djordjevic,B – Chrzan,A, Ann Arbor MI, 1997.

7.c4 a5 8.b5 0–0 9.d4 e4 10.Nfd2 c5 (10...c6!?+=) 11.d5+/– Bf5 12.Nc3 Ne5 13.Qb1 Qd7 14.Nce4 Nfg4 (14...Ne4 15.Ne4 Rae8 16.Be5 de5 17.Qc2+/–) 15.h3 (15.f4 Ng6 16.Bg4 Bg4+/–) 15...Nh6 16.Be5 (16.f4 Ng6+–) 16...de5+/– 17.Bd3 (17.Rd1 Rad8+/–) 17...Be4 18.Ne4 f5 19.Nc3 e4 20.Bc2 (20.Be2 Bf6 21.Qc2 Qd6+/–) 20...Bf6 (20...Nf7 21.Qb3+=) 21.Qe1 (21.Qb3 Nf7 22.Rad1 Qd6+/–) 21...Qd6 22.Rc1 (22.Rd1 Nf7+/–) 22...g5 (22...Nf7 23.f3 Ng5 24.f4+=) 23.g3 (23.Ne2 g4+/–) 23...b6 (23...Nf7 24.Bd1+=) 24.Bd1 Ra7 25.Kg2 Rg7 Black prepares g4 26.g4 (26.Bh5 g4+/–) 26...Bd8 (26...Rgf7 27.gf5 Bc3 28.Rc3 (28.Qc3 Nf5 29.Qe1 Nh4 30.Kg1 Rf3–+) 28...Nf5 29.Bh5 Nh4 30.Kg1 Nf3 31.Bf3 Rf3 32.Kg2–+) 27.gf5+= Bc7 (27...Qe5 28.Bc2 Nf5 29.Be4 Nh4 30.Kg1+=) 28.Rh1+/– (worse is 28.Ne4 Qh2 29.Kf3 Nf5=) 28...Qe5 (28...Re7 29.Bc2 Rfe8 30.Qe2+/–) 29.Bc2 (29.f6 Qf6 30.Ne4 Qf5+/–) 29...g4 30.hg4 (better is 30.Be4!? Nf5 31.h4+/–) 30...Ng4= Threatening mate: Nxe3. 31.Kf1 Nh2 (31...Nf2 32.Kf2 Qf5 33.Ke2 Rg2 34.Kd1 Qg4 35.Ne2 Rff2 36.Qf2 Rf2–/+) 32.Ke2+/– Nf3 33.Qd1 (better is 33.Qf1 Ng5 34.Bb1 Qf5 35.Qg2+/–) 33...Qf5?? (better is 33...Nd4 34.Ke1 Nf3 35.Kf1 Qc3 36.Be4 Nd2 37.Ke1 Qe5+=) 34.Be4+– (34.Ne4?! Be5+–) 34...Nd4? (34...Qf6+–) 35.Kd3 (35.ed4?? Qf2 36.Kd3 Rg3 37.Bf3 Rff3 38.Qf3 Rf3 39.Ke4 Qe3) 35...Qf2 (35...Qe5 36.Rh5 Qf6 37.ed4 Qd4 38.Kc2 Rf2 39.Kb1 Qc4 40.a3+–) 36.Rf1 (36.Qh5 Qe3 37.Ke3 Bf4 38.Kf2 Bd2 39.Bf3 Rf3 40.Qf3 Nf3 41.Kf3 Rf7 42.Ke4 Re7 43.Kf5 Bc1 44.Rc1 Re8+–) 36...Qg3 (36...Qh4 37.Rf8 (37.ed4?! Rg3 38.Kc2 Rf1 39.Qf1 cd4+/–) 37...Kf8 38.Qf1 Kg8 39.d6 (39.ed4?! Rg3 40.Kc2 cd4+/–) 39...Bd6 40.Bd5 (40.ed4?! Rg3 41.Kc2 Rc3 42.Kc3 Qe4+–) 40...Kh8 41.Ne4+–) 37.Rg1 Qh3 38.Rg7 (38.Rh1 Qe3 39.Ke3 Bf4 40.Kf2 Be5 41.Bf3 Rf3 42.Qf3 Nf3 43.Kf3 Rg3 44.Kf2 Rc3 45.Rc3 Bc3+–) 38...Kg7 39.Qh1 (39.Qg1 Kh6 40.Bg2 Qh4+–) 39...Qh1 40.Rh1 (40.Bh1?! Nf3 41.Bf3 Rf3 42.Rg1 Kf7+–) 40...Nf5 41.Rg1 Kf6 (41...Kh6 42.Rf1 Kg5+–) 42.Bf5 (42.Bf5 Be5 43.Bh7+–) 1–0. Barlocco,Carlo (2195) – Giannetta,Paolo (1980), Torneo Internazionale E. Crespi, 2006.

7.c4 a5 8.b5 0–0 9.d4 e4 10.Ng5 Bf5 11.f3 Bg6 12.Nd2 ef3 13.Bf3 (worse is 13.Ndf3 Ng4 14.Bc1 Nh2 15.Kh2 Bg5–/+) 13...d5 14.Nh3 Bd3 15.Rf2 Bb4 (15...Nb6 16.cd5 Bb5 17.e4=) 16.Qb3 Bf5 17.cd5 (worse is 17.Bd5 Bh3 18.gh3 Nd5 19.cd5 Bd2 20.Rd2 Re8+=) 17...Bd2 18.Rd2 Nb6 Black plans a4 (18...a4 19.Qb4=) 19.d6 a4 (19...cd6 20.Bb7 a4 21.Qd1=) 20.dc7+= Qc7 (worse is 20...ab3 21.cd8Q Rfd8 22.ab3 Ra1 23.Ba1 Bh3 24.gh3+–) 21.Qc3 Qc3 22.Bc3 Bh3 (22...Nbd5 23.Bb2 Bh3 24.gh3=) 23.gh3+= Nbd5 24.Rc1 Rfe8 25.Rd3 Ne4 26.Be1 f5 27.Rc5 Red8 (27...Ne3 28.Rc7 Nd5 29.Rb7=) 28.Be4 fe4 29.Ra3 b6 30.Rc4 Rf8 (30...Rdc8 31.Raa4 Ne3 32.Rc8 Rc8 33.d5+=) 31.Bd2 Rf5 32.Raa4 Raf8 Threatening mate... how? 33.Rc1 Rg5 34.Kh1 Rf2 35.Bb4 h6 (35...Ne3?? 36.Ra8 Kf7 37.Rf8 Ke6 38.Rc6 Kd7 39.Rd6 Kc7 40.Rf2+–; 35...Nb4?! 36.Rb4 Ra2 37.Rc8 Kf7 38.Rb1=) 36.Bd6 Ne3 37.Bg3 Rf3 Threatening mate: Rgf5 38.Rb4 Rgf5 Do you see the mate threat? 39.Rbb1 Nd5 40.a4 Ra3 41.Ra1 Rff3 42.h4 Rfc3 43.Rg1 Ra1 44.Ra1 Rc2 45.Kg1 Rd2 46.Be1 (46.Be5 e3 47.Kf1 Kf7=) 46...Rb2 (46...Rd3 47.Rb1+=) 47.Bg3= Kf7 48.Kf1 Ke6 49.Re1 Kf5 50.Be5 g5 51.hg5 hg5 52.Re2 Rb4 (52...Rb4 53.Ra2 Rb1 54.Kg2 Nf4 55.Kf2 Nd3 56.Kg2 Ne5 57.de5 Ke5–/+) 0–1. Zylla,Johannes – Pischner,R, corr, 2004.

7.c4 c5 8.bc5 Nc5 9.d4 ed4 10.ed4 Nce4 11.Nbd2 0–0 12.Bd3 Nd2 13.Qd2 Rc8 14.d5 Bd7 15.Rfe1 Re8 16.Re2 a6 17.Rae1 b5 18.cb5 Bb5? (better is 18...ab5 19.Qb4 Ra8+/–) 19.Bb5+– ab5 20.Bf6 gf6 21.Qf4 Rc4 22.Nd4 Kh8 23.Qe3 (23.Qe3 Qd7 24.Nc6 Rc6 25.dc6 Qc6 26.Qd4+–) 1–0. Fournier,Frederic (2120) – Barraud,Mickael (1690), echecsemail.com, 2006.

7.d3 0–0 A) 8.Ng5 A1) 8...Bf5 9.e4 (9.Nc3 c6 10.Qd2 Nd5 11.Nf3 a5 12.ba5 N5f6 13.e4) 9...Bg6 10.Nc3 c6 11.Qd2 d5 12.ed5 cd5 13.Na4; A2) 8...d5 9.Bc3 (9.d4 e4 10.Ne6 fe6 11.b5 Nb6 12.a4 c6 13.Nd2) 9...c5 10.bc5 Bc5 11.Nd2 Qc7 12.Ne6 fe6 13.Bb2; A3) 8...a5 9.Ne6 fe6 10.b5 d5 11.Nd2 Bd6 12.Nf3 Qe7 13.c4; B) 8.a3 a5 9.Nbd2 (9.Nc3 d5 10.Qd2 ab4 11.ab4 Bb4 12.Ra8 Qa8 13.Ra1) 9...ab4 10.ab4 Nd5 11.c3 Ra1 12.Qa1 Qa8 13.d4; C) 8.Nbd2 C1) 8...a5 9.ba5 (9.b5 Nc5 10.a4 Qd7 11.h3 h6 12.d4 ed4 13.Nd4) 9...Ra5 10.Ng5 Bd5 11.c4 Bc6 12.Bf3 d5 13.Qc2; C2) 8...c5 9.b5 (9.a3 Qb6 10.Ng5 d5 11.Rb1 cb4 12.ab4 Bf5 13.e4) 9...h6 10.c4 Qc7 11.Qc2 d5 12.cd5 Nd5 13.a3; C3) 8...h6 9.h3 (9.c4 a5 10.a3 Nb6 11.Qc2 ab4 12.ab4 Qd7 13.b5) 9...a5 10.a3 ab4 11.ab4 Nb6 12.c4 Ra1 13.Ba1; D) 8.Nc3 D1) 8...a5 9.b5 (9.a3 d5 10.ba5 Ra5 11.Ng5 Nc5 12.Qd2 c6 13.Ne6) 9...h6 10.h3 a4 11.Ba3 d5 12.Qc1 Bd6 13.d4; D2) 8...d5 9.b5 (9.Ng5 Bb4 10.f4 ef4 11.Ne6 fe6 12.ef4 e5 13.fe5) 9...h6 10.d4 e4 11.Ne5 Bd6 12.Na4 Bf5 13.c4; D3) 8...h6 9.Qd2 (9.a3 Nb6 10.Qd2 Qd7 11.h3 Na4 12.Na4 Qa4 13.c4) 9...a5 10.a3 d5 11.Na4 Qe8 12.ba5 Bd6 13.h3.

7.d3 a5 A) 8.ba5 A1) 8...0–0 9.Qd2 (9.Ng5 Bf5 10.Nd2 Nc5 11.a6 Na6 12.Nge4 Nb4 13.c4) 9...c6 10.Ng5 Bg4 11.f3 Bf5 12.f4 ef4 13.Rf4; A2) 8...Ra5 9.Nbd2 (9.Nc3 h6 10.Qd2 c6 11.e4 Nc5 12.Qe3 0–0 13.d4) 9...0–0 10.Ng5 Bd5 11.c4 Bc6 12.Bf3 d5 13.Qc2; B) 8.a3 0–0 (8...ab4 9.ab4 Ra1 10.Ba1 0–0 11.Nc3 d5 12.b5 h6 13.Bb2) 9.Nbd2 (9.Nc3 d5 10.Qd2 ab4 11.ab4 Bb4 12.Ra8 Qa8 13.Ra1) 9...ab4 10.ab4 Nd5 11.c3 Ra1 12.Qa1 Qa8 13.d4; C) 8.b5 C1) 8...0–0 9.Nc3 (9.Ng5 Bf5 10.Nc3 h6 11.f4 hg5 12.fe5 Be6 13.ef6) 9...h6 10.h3 a4 11.a3 Qb8 12.Qd2 Qa7 13.Rfe1; C2) 8...h6 9.Nc3 (9.h3 0–0 10.Nc3 a4 11.a3 Qb8 12.Qd2 Qa7 13.Rfe1) 9...0–0 10.h3 a4 11.a3 Qb8 12.Qd2 Qa7 13.Rfe1.

7.d3 c5 A) 8.b5 A1) 8...Qa5 9.c4 (9.Nc3 h6 10.Qd2 Qc7 11.e4 0–0 12.Nh4 d5 13.ed5) 9...h6 10.Nc3 0–0 11.Qd2 Qc7 12.h3 Rfe8 13.a4; A2) 8...h6 9.c4 (9.Nc3 d5 10.Qd2 0–0 11.Na4 Qc7 12.Ne5 Ne5 13.f4) 9...0–0 10.Nc3 a6 11.a4 Qc7 12.Qb3 Bf5 13.h3; A3) 8...a6 9.Nc3 Qa5 10.a4 0–0 11.Ng5 Qb4 12.Rb1 ab5 13.Ne6; B) 8.Ng5 B1) 8...0–0 9.Ne6 (9.bc5 Nc5 10.Nc3 h6 11.Ne6 Ne6 12.Bf3 Qd7 13.Ne4) 9...fe6 10.bc5 Nc5 11.Nc3 d5 12.d4 ed4 13.ed4; B2) 8...Qb6 9.Ne6 (9.Nd2 cb4 10.Ne6 fe6 11.d4 0–0 12.Bc4 d5 13.de5) 9...fe6 10.Nd2 cb4 11.d4 0–0 12.Bc4 d5 13.de5; B3) 8...cb4 9.a3 (9.Ne6 fe6 10.a3 a5 11.ab4 ab4 12.Nd2 0–0 13.Ra8) 9...a5 10.ab4 ab4 11.Nd2 0–0 12.Ra8 Qa8 13.Ne6; C) 8.bc5 Nc5 9.Nc3 0–0 10.d4 ed4 11.Nd4 d5 12.Ne6 fe6 13.Qd4.

7.d3 c6 8.Nbd2 A) 8...Qb6 9.a3 (9.Ng5 Qb4 10.Ne6 fe6 11.Nc4 Nb6 12.Ba3 Qa4 13.Bd6) 9...0–0 10.Ng5 d5 11.Ndf3 a5 12.Ne6 fe6 13.Ne5; B) 8...0–0 9.Ne4 (9.Ng5 Bf5 10.a3 d5 11.e4 Bg6 12.Ngf3 de4 13.de4) 9...h6 10.Qd2 Qc7 11.c4 a5 12.a3 Ne4 13.de4; C) 8...h6 9.Ne4 (9.Nc4 0–0 10.Qd2 Nb6 11.Nb6 Qb6 12.c4 a5 13.a3) 9...0–0 10.Qd2 Qb6 11.h3 Ne4 12.de4 Nf6 13.Bd3.

7.d3 c6 8.Ng5 h5 (8...Bf5 9.e4 (9.Nd2 0–0 10.Ndf3 Nd5 11.c4 Nb4 12.a3 Nd3 13.Bd3) 9...Bg6 10.a3= (10.Nc3 0–0 11.a3 d5 12.Nf3 d4 13.Na4) 10...d5 11.Nd2 Qc7 12.ed5 cd5 13.c4; 8...Qb6 9.Ne6 (9.Nd2 Qb4 10.Ne6 fe6 11.Nc4 Nb6 12.Ba3 Qa4 13.Bd6) 9...fe6 10.a3 0–0 11.Nd2 d5 12.Nb3 Bd6 13.Qd2; 8...0–0 9.Nc3 (9.Ne6 fe6 10.a3 a5 11.Nd2 d5 12.Nf3 Qb6 13.Ne5) 9...Bf5 10.Qd2 Nd5 11.Nd5 cd5 12.Nf3 Nb6 13.a4; 8...d5 9.d4 (9.Ne6 fe6 10.Bg4 Bb4 11.Be6 Qe7 12.Bh3 0–0 13.Nc3) 9...e4 10.Ne6 fe6 11.c3 0–0 12.Nd2 Bd6 13.Qb3) 9.Nd2 (9.Ne6 fe6 10.Nd2 (10.a3 Qc7 11.c4 0–0–0 12.Nc3 Kb8 13.d4) 10...Qb6+= (10...d5 11.a3 Bd6 12.c4 Qe7 13.Qc2) 11.Nc4 Qc7 12.f4 ef4 13.ef4) 9...Qc7 (9...Bg4 10.f3 (10.Nc4 b5 11.Na5 Qb6 12.Bf3 Nd5 13.Bg4) 10...Bf5 11.e4= Bg6 12.Nc4 b5 13.Na5) 10.c4 (10.Ne6 fe6 11.c4 (11.Ne4 d5 12.Ng5 Qd6 13.a3) 11...h4+= (11...d5 12.cd5 ed5 13.b5) 12.Nf3 h3 13.Ng5) 10...d5 (10...Bf5 11.a3+= (11.Nde4 h4 12.f4 0–0 13.fe5) 11...0–0 12.h3 a5 13.Ndf3) 11.c5 (11.Ne6 fe6 12.a3+= (12.cd5 ed5 13.b5) 12...0–0–0 13.b5; 11.cd5 Bd5 12.e4 Be6 13.Ne6) 11...e4 (better is 11...Bf5= 12.Ndf3 Nh7 13.e4; 11...Bg4 12.f3 Bf5 13.e4) 12.Ne6 fe6 13.de4 de4 14.Nc4 (14.Qc2 0–0–0+/–) 14...0–0–0 (14...e5 15.Rc1+/–) 15.Qb3 (15.Nd6 Kb8+/–) 15...Nd5 (15...Ng4 16.g3+/–) 16.f4 (better is 16.Rad1+/–) 16...Rdf8?? (better is 16...ef3 17.Rf3 Rhg8+/–) 17.Bg7+– Nc5 (17...h4+–) 18.bc5 Bc5 19.Be5 (worse is 19.Bf8 Rf8 20.Kh1 b5+–) 19...Qe7 20.Rab1 (better is 20.Bh8!? Rh8 21.Kh1 Qg7+–) 20...Rh7 (20...Rhg8 21.Kh1+–) 21.Rbd1 (21.Kh1 h4+–) 21...Rg8 (21...b5 22.Kh1 a6 23.Na5+–) 22.Rf2 Qh4 (22...h4 23.Bd4+–) 23.Nd6 (23.Bd6!? Bd6 24.Nd6 Kb8 25.Ne4 Rf7+–) 23...Bd6 24.Bd6 Rhg7 (24...Qh3 25.Bc5 Rhg7 26.Bf1+–) 25.Be5 Rg6 26.Rb1 b6 (26...b5 27.Rc1 Kd8 28.Qa3+– (worse is 28.Rc6 Rg2 29.Rg2 Qe1 30.Bf1 Rg2 31.Kg2 Ne3 32.Kh3 Qf1 33.Kh4 Nf5 34.Kh5 Qe2 35.Kg5 Qg2 36.Kf6 Qg7 37.Ke6 Qd7 38.Kf6 Qc6 39.Kf5 Kc8+–)) 27.Rc1 (27.Qa4 Kd8 28.Qc6 Qf2 29.Kf2 Rg2 30.Ke1 Re2 31.Ke2 Rg2 32.Ke1 Rg1 33.Kf2 Rb1 34.Qd6 Ke8 35.Qe6 Kf8+–) 27...Kd8 (27...Qh3 28.Bf1 Qe3 29.Rc6 Kd7 30.Qb5+–) 28.Rd1 (28.Qa3 Ke8 29.Qa7 Qh3 30.Qb8 Kf7 31.Qb7 Ne7+–) 28...Qh3 29.Bf1 Rg4 (29...Qg4 30.Rfd2 Qh3 31.Kh1+–) 30.Qc3 (30.Qc3 Kd7 31.g3 Rg3 32.hg3 Rg3 33.Bg2+–) 1–0. Barreiro Pineiro,J (1975) – Bazal Bouza,Xose Henrique, Adolfo Pedrido Mem, Vilagarcia de Arous, 2006.

7.d3 h6 A) 8.Nc3 A1) 8...c6 9.d4 (9.b5 0–0 10.a4 Qc7 11.h3 a6 12.d4 ab5 13.ab5) 9...e4 10.Nd2 d5 11.b5 0–0 12.bc6 bc6 13.h3; A2) 8...d5 9.b5 (9.a3 0–0 10.Na4 b5 11.Nc5 Nc5 12.bc5 e4 13.Nd4) 9...0–0 10.Qd2 Bd6 11.a4 Qe7 12.a5 Nc5 13.Ba3; A3) 8...0–0 9.Qd2 (9.h3 d5 10.Na4 Bb4 11.Ne5 Qe7 12.Nf3 a6 13.Nd4) 9...c6 10.Ne4 Qb6 11.a3 d5 12.Nf6 Bf6 13.h3; B) 8.a3 B1) 8...c6 9.c4 (9.Qd2 0–0 10.c4 Qb6 11.Nc3 a5 12.Ne4 Ne4 13.de4) 9...0–0 10.Nc3 a5 11.h3 Qb6 12.b5 Qc7 13.Qc2; B2) 8...Nb6 9.c4 (9.Nc3 0–0 10.Qd2 Qd7 11.h3 Na4 12.Na4 Qa4 13.c4) 9...0–0 10.Nc3 Qd7 11.Qc2 a5 12.h3 ab4 13.ab4; B3) 8...0–0 9.c4 (9.Qd2 Nb6 10.Nc3 Qd7 11.h3 Na4 12.Na4 Qa4 13.c4) 9...c6 10.Nc3 a5 11.d4 Qc7 12.Bd3 Nb6 13.Qe2; C) 8.Nbd2 C1) 8...c6 9.c4 (9.Ne4 Qb6 10.Qd2 0–0 11.a3 a5 12.c4 Ne4 13.de4) 9...0–0 10.Qc2 a5 11.a3 Bf5 12.e4 Be6 13.d4; C2) 8...Nb6 9.c4 (9.c3 0–0 10.Qc2 c6 11.d4 Qc7 12.h3 a6 13.Rfd1) 9...0–0 10.Qc2 Qd7 11.a4 a5 12.b5 Rfe8 13.Bc3; C3) 8...0–0 9.c4 (9.a4 Nd5 10.b5 Nc5 11.d4 ed4 12.Nd4 Qd7 13.N2b3) 9...a5 10.a3 c6 11.Qc2 Qb6 12.Bc3 ab4 13.ab4; D) 8.Qd2 D1) 8...c6 9.a3 (9.Nc3 0–0 10.Ne4 Qb6 11.a3 d5 12.Nf6 Bf6 13.h3) 9...0–0 10.c4 Qb6 11.Nc3 a5 12.Na4 Qc7 13.h3; D2) 8...a5 9.ba5 (9.b5 0–0 10.Nc3 a4 11.a3 Re8 12.h3 b6 13.Rfe1) 9...0–0 10.Na3 Nc5 11.Rfb1 c6 12.d4 Nce4 13.Qb4; D3) 8...0–0 9.Nc3 (9.a3 Nb6 10.Nc3 Qd7 11.h3 Na4 12.Na4 Qa4 13.c4) 9...c6 10.h3 a5 11.b5 Qc7 12.Rab1 Nc5 13.Ba3.

4.Nf3 h6

5.a4 a6 6.c4 (6.d4 d5 7.de5 Bb4 8.Bc3 Nc6=) 6...c6 (6...Nc6 7.b5 Na5 8.d3=) 7.Nc3 (7.a5 Nd7=) 7...Qb6 8.b5 ab5 (8...Nf6 9.d4 e4 10.Nd2=) 9.ab5+= Ra1 10.Qa1 c5 (10...Nf6!?+=) 11.Qa8+/– f6?? (better is 11...Qc7+/–) 12.Qb8+– (12.Qb8 Qd8 13.Qb7+–) 1–0. DEFFM – GuestNKKT, freechess.org, 2016.

5.a4 Nf6 6.Be2=.

5.c4 c6 6.Be2 Nf6 7.0–0 Be7 8.a3 (8.Nc3 0–0=) 8...0–0 9.d3 (9.Nc3 Nbd7=) 9...Nbd7 (9...a5 10.Nc3=) 10.Nbd2 Re8 (10...Qb6 11.Qc2=) 11.Re1 (11.Qc2 c5=) 11...Bf8 (11...a5 12.Qc2=) 12.Rc1 (12.Qc2 a5+=) 12...Bg4 (12...a5 13.b5=) 13.h3 Bh5 14.e4 (14.Bc3 d5=) 14...c5 (14...Qb6 15.Nb3=) 15.Nh4 (15.Rb1 b6=) 15...Be2 16.Qe2 b6 (16...d5 17.ed5 cb4 18.ab4 Bb4 19.Nhf3=) 17.Nf5+= g6 (17...a6 18.Qe3+=) 18.Ne3 Qe7 (18...cb4 19.ab4 a5 20.Ra1+=) 19.Nd5 (19.Qf3 Bg7+=) 19...Nd5 20.ed5 Nf6 (20...Bg7 21.Ra1=) 21.Qf3 (21.Qe3 cb4 22.ab4 a5+=) 21...Nh5 (21...cb4 22.ab4 Bg7 23.Ra1+=) 22.g3 (22.d4 cd4 23.Bd4 Bg7+=) 22...Bg7= 23.Ne4 (23.Rb1 f5=) 23...f5 24.Nd2 (24.Nc3 Nf6=) 24...Rf8 (24...e4 25.Bg7 ef3 26.Re7 Re7 27.Bh6 cb4 28.ab4=) 25.Qg2 (25.Rb1 cb4 26.ab4 a5=) 25...Qg5 (25...Qc7 26.bc5 bc5 27.Rb1=) 26.Nf3 (26.Re2 cb4 27.Nf3 Qf6 28.ab4 a5 29.ba5 Ra5=) 26...Qf6 27.Nh4 (27.Re2 Qf7=) 27...Kh7 (27...f4 28.bc5 bc5 29.Rb1–/+) 28.f4 (28.Nf3 Qf7 29.Nd2 Qc7=) 28...Qe7 (better is 28...Nf4 29.gf4 Qh4 30.fe5 de5–/+) 29.fe5 (29.Nf3+=) 29...Be5 (29...cb4 30.ab4 de5+/–) 30.d4 (better is 30.Nf3 f4 31.Be5 de5 32.Re5+/–) 30...cd4+= 31.Bd4?? (better is 31.Nf3 Qg7 32.c5 bc5 33.bc5 Bg3 34.Bd4+=) 31...Rac8?? (better is 31...Bd4 32.Kh2 Qg7–+) 32.Be5 (32.Nf3!? Bd4 33.Nd4+=) 32...de5= 33.g4 (33.Nf3 e4=) 33...fg4 (33...Qh4 34.gh5 g5 35.Qf2 Qh3 36.Re5 Qg4 37.Kh2+=) 34.Qg4= Nf4 0–1. GuestVRDG – playerpal, freechess.org, 2016.

5.c4 Bf5 6.Nc3=.

5.c4 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.Nf3 h6).

5.d4 d5 6.Ne5 Bb4 7.Bc3 Bd6=.

5.Be2 Nf6 6.0–0 Nbd7 7.c4 c6 8.a3 Qc7 9.d3 d5 10.cd5 Nd5 11.Nbd2 N5f6 12.Qc2 Be7 13.Nc4 The pressure on e5 grows 13...Bc4 14.dc4 0–0 15.Rfd1 Rfe8 16.c5 b6 17.cb6 ab6 18.Nh4 Bf8 19.Rac1 Rad8 (better is 19...c5!?+/–) 20.Qc6+– Qc6 21.Rc6 Rc8 22.Bb5 Rc6 23.Bc6 Rd8? (better is 23...Rc8 24.Bd7 Nd7+–) 24.f4 ef4 25.Bf6 gf6 26.Rd7 Rc8 27.Bd5 fe3 28.Kf1 Rc1 29.Ke2 Rc2 30.Ke3 Rc3 31.Kd2 Ra3 32.Bf7 Kh8 (32...Kh7 33.Be6 Bg7+–) 33.Bd5 Bb4 (33...Rg3 34.hg3 Bg7 35.Rd8 Bf8 36.Rf8 Kg7 37.Rf7 Kg8 38.Re7 Kf8 39.Ng6) 34.Ke2 1–0. marekt – lout62001, gameknot.com, 2013.

5.Be2 Nf6 6.0–0 Be7 7.c4 Nbd7 8.Qc2 c5 9.b5 a6 10.a4 ab5 11.ab5 0–0 12.Nc3 Nb6 13.d3 Bf5 14.e4 Bh7 15.h3 Nfd7 16.Ra8 Qa8 17.Ra1 Qc8 18.Nd2 f5 19.Nf1 Nf6 20.Ne3 f4 21.Ng4 Nbd7 22.Ra7 h5 23.Nh2 g5 24.Qd1 Bg6 25.Nf3 g4 26.Nh4 Bh7 27.hg4 Ng4 28.Bg4 Bh4 29.Bd7 (29.Be6 Kh8 30.Qh5 Nf6 31.Qh6 Bg5 32.Qh7 Nh7 33.Bc8 Rc8 34.Rb7) 29...Qd7 30.Qh5 Bd8 31.Nd5 Rf7 32.Ra8 Kg7 33.Bc1 Bg6 34.Qh2 Rf8 35.g3 Qg4 36.Qg2 f3 37.Qh2 Rh8 38.Qh8 Kh8 39.Rd8 Kg7 40.Rb8 Qh3 41.Rb7 Bf7 42.Ne3 Qc8 43.Nf5 Kf6 44.Rf7 Ke6 45.Re7 Kf6 46.Rh7 (46.Rf7 Kf7 (46...Ke6 47.Bg5!! White misses the mating net with only 1min 30secs on the clock 47...Kf7 48.Nd6 Kg6 49.Nc8 Kg5 50.b6) 47.Nd6!) 46...Qf8 47.Rh6 Kf7 48.Rd6 Qh8 49.Rh6 Qa8 50.Ra6 Qd8 51.Rd6 Qa5 52.Rd7 Ke8 53.Re7 Kd8 54.Bg5 Qa1 55.Kh2 Qf1 56.Re5 Kc7 57.Rc5 Kb6 58.Rc6 Ka5 59.Ra6 Kb4 60.Be7 Kb3 61.Ra3 Kb2 62.Ne3 Qf2 63.Kh3 Qe3 64.Ra6 f2 65.Bf6 Kb3 66.Be7 f1Q 67.Kh4 Qh1 68.Kg4 Qef3 69.Kg5 Qhh5 0–1. Murrell,Mal (1640) – Krajina,Sead (2840), Mingara, 2000.

3.e3 Qe7

4.Nc3 Nf6 5.Be2 (5.Nf3 d5=) 5...a6 (5...Bf5 6.Nf3=) 6.Nf3 Nc6 7.a3 Bg4 (7...e4 8.Nh4=) 8.h3 (8.0–0 Bf5=) 8...Bf3 (8...Bf5 9.g4 Be6 10.Ng5=) 9.Bf3+= e4 10.Be2 d5 11.d3 (11.Rb1 Qe6=) 11...0–0–0 (11...Qe6 12.b5 ab5 13.Nb5+=) 12.0–0 (12.b5 ab5 13.Nb5 Ne5+=) 12...Qd6 (12...d4 13.Ne4 Ne4 14.de4 de3 15.Bd3+=) 13.de4 (13.b5 ab5 14.Nb5 Qe6+=) 13...de4= 14.Bg4 Kb8 15.Qe2 Be7 16.b5 (16.Rad1 Qe5 17.f4 ef3 18.Rd8 Nd8 19.Bf3 Bd6=) 16...ab5= 17.Nb5 Qd2 (17...Qc5 18.Nd4=) 18.Qd2 (18.Rfd1 Qe2 19.Be2 Rhf8+=) 18...Rd2 19.Rac1 (19.Bc3 Rd5 20.Be2 Rhd8=) 19...Ng4+= 20.hg4 Bf6 (20...Rhd8 21.Bg7 Rg8 22.Bb2=) 21.Nc3 (better is 21.Bf6!? gf6 22.Rfd1 Rd1 23.Rd1+=) 21...Rhd8 (21...Rd7 22.g5 Be5 23.Rcd1+=) 22.g5 Be5 (22...Bg5 23.Ne4 A double attack) 23.f4 (23.Ba1!?=) 23...ef3–/+ 24.Rf3 (24.gf3 f5–/+) 24...f6 (24...Na5!? 25.Na4 Nc4 26.Be5 Ne5 27.Rh3–/+) 25.gf6 Bf6 26.e4 (26.Rf2 Na5 27.Rd2 Rd2+=) 26...Bc3 (better is 26...Bd4!? 27.Kh1 Ne5–+) 27.Bc3= Rd1 (better is 27...Nd4!? 28.Bd4 R8d4=) 28.Rd1+= Rd1 29.Kh2 Rd7 30.Rg3 (30.Rf8 Ka7+=) 30...g6 31.e5 (31.Re3 b5+=) 31...Re7 32.Re3 Re6 (32...h6 33.Kg3+=) 33.a4 (33.Kg3 Kc8+=) 33...Ne7 (better is 33...Kc8=) 34.Bd4 (better is 34.Rf3!?+=) 34...Nf5–/+ 35.Re4 Nd4 36.Rd4 Re5 37.Rd7 (37.Rd8 Ka7–/+) 37...h5 38.Rd8 Ka7 39.Rd7 (39.Rf8 Rc5 40.Rg8 g5–+) 39...Rc5–+ 40.Rg7 g5 41.Rh7 (41.Rg6 b6–+ (41...Rc2?! 42.Rg5 Ra2 43.Rh5–/+)) 41...g4 (worse is 41...Rc2 42.Rh5 Rc5 43.Kg3–/+) 42.Kg3 (42.Rh6 b6–+ (worse is 42...Rc2 43.Rh5 Ka6 44.Rh8–/+)) 42...Rc3 (42...Kb6 43.Rh8–+) 43.Kf4 (better is 43.Kh2!?–/+) 43...Rc2–+ 44.Rh5 (44.Kg3 Rc4–+) 44...Rg2 45.Ra5 (45.Re5 b6–+) 45...Kb6 46.Rb5 Kc6 (46...Ka6 47.Rc5 c6 48.a5–+) 47.Ke3 (47.Rb1 b6–+) 47...Ra2 48.Rb4 g3 49.Rg4 g2 50.Kf3 (50.Rg5 Kb6–+) 50...Kb6 51.Ke3 (51.Rg5 c5–+) 51...Ka5 52.Kd3 (52.Kf3 c5–+) 52...Ra4 (better is 52...Ra3 53.Kd2 Ra1–+) 53.Rg2 b5 54.Rg5 Ra3 55.Kc2 (55.Kd4 Kb4–+) 55...Kb4 56.Rg4 Kc5 57.Rg5 Kb6 58.Kb2 (58.Rg6 c6–+) 58...Rh3 (58...b4 59.Rg8–+) 59.Rg6 c6 60.Rg8 (60.Rd6 b4–+) 60...Rh2 (60...c5 61.Rg6 Ka5 62.Rg5 Rh2 63.Ka3 b4 64.Kb3 Rh3 65.Kb2–+) 61.Kc3 Rh5 (61...c5 62.Rb8 Kc6 63.Rc8 Kd6 64.Rd8 Kc7 65.Re8–+) 62.Rb8 Kc5 63.Re8 b4 64.Kb3 Rh3 65.Kb2 Rd3 (65...Kd4 66.Rd8 Kc4 67.Rd2–+) 66.Kc2 (66.Re4 b3–+) 66...Kc4 67.Re4 Rd4 68.Rd4 (68.Re2–+) 68...Kd4 69.Kb3 c5 70.Kc2 c4 71.Kb2 c3 72.Kc2 Kc4 73.Kc1 b3 (73...Kd3 74.Kd1 b3 75.Kc1 b2 76.Kb1 Kd2 77.Ka2 Kc2 78.Ka3 b1Q 79.Ka4 Kd3 80.Ka5 c2 81.Ka6 c1Q 82.Ka5 Qa3) 74.Kb1 Kd3 Black prepares the advance c2 75.Ka1 Kd2 (75...b2 76.Kb1 Kd2 77.Ka2–+) 76.Kb1 c2 77.Kb2 c1Q 78.Kb3 Kd3 79.Kb4 Qc4 80.Ka3 (80.Ka5 Qc6 81.Kb4 Qb6 82.Ka4 Kc4 83.Ka3 Qb3) 80...Qb5 81.Ka2 Qb4 (81...Kc3 82.Ka3 Qb3) 82.Ka1 Kc2 0–1. Froemel,Paul – Prim,Markus, Wuerttemberg–ch U12, 2001.

4.c4 c6 5.a3 Be6 6.Nf3 g6 (6...a5 7.b5=) 7.Be2 Bg7 8.0–0 Nf6 9.d3 0–0 10.Ng5 Bd7 11.Nc3 d5 Black prepares e4 12.cd5 cd5 13.Nf3 e4 14.Nd4 ed3 (14...Nc6 15.Nc6 bc6 16.Na4+=) 15.Bd3 Nc6 16.Ncb5 Nd4 17.Bd4 Bb5 18.Bb5 Rfc8 19.Qb3 b6 20.Ba6 Rd8 21.Rac1 Ne8 22.Qb2 (22.Rfd1 Bd4 23.Rd4 Nc7+/–) 22...Bd4 23.Qd4 Qf6 (23...Nc7 24.Be2+=) 24.Qg4 (24.Rfd1 Rd7+/–) 24...Qe6 25.Qe2 Nd6 (25...d4 26.Qf3 de3 27.fe3+=) 26.Rc6 (26.Rfd1 Nf5+/–) 26...Qe5 (26...Qd7 27.Rfc1+/–) 27.Rfc1+/– Nc4 (27...Nf5 28.Rc7+/–) 28.Bc4 dc4 29.R6c4 Qd5 30.Rc7 Qd2 31.Qf3 Qd5 32.e4 Qe6 33.h3 Rac8 34.Qf4 Rc7 35.Qc7 Qd7 36.Qf4 Qd6 37.e5 Qd2 38.Rc7?? (better is 38.Qd2 Rd2 39.Rc8 Kg7 40.Rc7+–) Qf4 0–1. GuestLJTQ – GuestBLXP, freechess.org, 2017.

4.c4 d5 5.a3 dc4 6.Bc4 e4 7.d3 Bf5 8.de4 Be4 9.Nf3 Nd7 10.Nc3 Rd8? (better is 10...Bf3!? 11.Qf3 c6+/–) 11.Ne4+– Nb6?? (11...Qe4 12.Bf7! Ke7+–) 12.Qc2 f5 13.Neg5 f4 (13...Nc4 14.Qc4 Rd7+–) 14.Bf7 Kd7 (14...Qf7 15.Nf7 Kf7 16.Qc7 Be7 17.Ng5 Ke8 18.Bg7 Bg5 19.Bh8+–) 15.0–0–0 (15.Qf5 Kc6 16.b5 Kd6 17.Rd1 Nd5 18.Rd5) 15...Kc8+– 16.Rd8 Qd8 17.Rd1 Nf6 (17...Qe7 18.Bg8 fe3 19.Bh7+–) 18.Rd8 Kd8 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

4.c4 f5 5.d4 (5.Nf3 Nf6=) 5...e4 (5...ed4 6.Bd4 Nc6 7.Bc3=) 6.Nc3 Nf6 7.Nh3 c6 (7...Nbd7 8.Nf4+=) 8.Be2 d5 9.a3 (9.c5 Nbd7+=) 9...Be6 (9...dc4 10.Bc4 b5 11.Bb3+=) 10.cd5+= Nd5 11.Nd5 Bd5 12.Nf4 Qd7 13.0–0 (13.Nd5 cd5 14.0–0 Bd6+=) 13...Bd6 (13...Bf7 14.d5 cd5 15.Qd2+=) 14.Nd5 cd5 15.f3 0–0 (15...Qe6 16.fe4 fe4 17.Bh5 Kd8 18.Qg4+/–) 16.fe4 de4 17.Rc1 Nc6 (17...b5 18.Qc2+=) 18.Bb5+/– a6 19.Bc6 bc6 20.Qa4 (20.d5+/–) 20...Rfc8 (20...a5!? 21.ba5 Rac8+=) 21.d5!+/– Qa7 (21...cd5 22.Qd7 Pinning (22.Qd7 Deflection; 22.Rc8 Decoy)) 22.Bd4 c5 23.bc5 Bc5 24.Rc5 Rc5 25.d6 (worse is 25.Rf5 Rc1 26.Kf2 Qe7–/+) 25...Qb6?? (better is 25...Rb8+/–) 26.Qd7+– (26.Bc5?! Qc5 27.d7 Qe3 28.Kh1 h6+=) 26...Qc6 (26...Qa7 27.Qa7 Ra7 28.Bc5 Rf7+–) 27.Qg7 1–0. Janek – enoli, internet free game, 2017.

4.c4 Nf6 5.Be2=.

4.Nf3 Nf6=.

3.e3 Be7

4.a3 b6 5.Be2 Nd7 6.Nf3 Bb7 7.0–0 Ngf6 8.d3 h6 9.Nbd2 Nh7 (9...0–0 10.c4=) 10.Ne1 0–0 11.Bf3 Bf3 12.Nef3 (worse is 12.gf3 c6+=) 12...f5 13.c4 Rf7 14.e4 Ng5 15.Ne1 f4 (15...a5 16.b5=) 16.Ndf3 Nf3 17.Nf3 (worse is 17.gf3 c5+=) 17...Kh7 18.d4 Bf6 19.de5 Ne5 20.Ne5 Be5 21.Be5 de5 22.Qd5 Qe8 23.f3 (23.Rfd1 f3=) 23...Rd8+= 24.Qb7 (24.Qb5 Rfd7+=) 24...c6 25.Qa6 Rfd7 26.Qa4 Qg6 27.Rad1 Rd2 28.Rd2 Rd2 29.Rf2 Rd7 30.h3 Qe6 31.Qc2 (31.Qa6!?+=) 31...Rd4–/+ 32.Qa4 (32.c5 Rc4 33.Qb2 bc5–/+) 32...Qd7 ½–½. Buck,Klaus Michael (1835) – Galas,Franco (1790), Arco op, 2009.

4.a3 Nc6 5.c4 a6 6.Nf3 f5 7.d4 e4 8.Nfd2 Nf6 9.d5 Ne5 10.Nc3 0–0 11.h3 h6 12.Be2 Nh7 13.Qc2 b5? (better is 13...Ng5!?=) 14.cb5+/– ab5 (14...Nf6 15.0–0+/–) 15.Bb5 (15.Nb5 Bb7+–) 15...Bd7 16.Bd7 (16.0–0 Nf6+–) 16...Qd7 17.0–0 c6 18.dc6 Nc6 19.Nd5 Bf6?? (19...Ra7+–) 20.Bf6 (20.Nf6?! Nf6 21.Rfd1 Rac8+/–) 20...Nf6 21.Nf6 (better is 21.Qc6! Qc6 22.Ne7 Kf7 23.Nc6+–) 21...Rf6+/– 22.Rfc1 Ne5 23.Qb3 Kh7 24.Nc4 Nc4 25.Qc4 Raf8 26.Qc7 Qc7 27.Rc7+– d5 28.Rd7 f4 29.Rd5 fe3 30.fe3 Rf2 31.Re5 Rb2 32.Re4 Rff2 33.Rg4 h5 34.Rg3 Kh6 35.b5! g5 36.b6! h4 37.Rg4 Rfe2 38.a4 Rb6 39.a5 Ra6 40.Rb4 Re3+/– 41.Rb6 Rb6 42.ab6 Rb3 43.Ra6 Kg7 44.Ra7 Kf6 45.b7 Ke6+= 46.Ra6 Kd7 47.Rg6+– Rb5 48.b8Q Rb8+/– 49.Rg5 Rh8 50.Kf2 Ke6 51.Kf3 Kf6 52.Kg4 Rh6 53.Rh5+– Rg6 54.Kh4 Rg2+/– 55.Rh6 Kg7 56.Ra6 Kh7 57.Kh5 Rg1 58.h4 Rg8 59.Ra7 Kh8 60.Kh6 Rd8 61.h5 Rd6 62.Kg5 Rd5 63.Kg6 Rd6 64.Kf7 Rh6 65.Ra8 Kh7 66.Ra5 Rc6 67.Re5 Rc7 68.Kf6 Rg7 69.Re6 Rg5?? 70.Kg5 (70.Kg5 Kg7 71.h6 Kf8 72.Rf6 Ke8 73.h7 Ke7 74.h8Q Kd7 75.Qg7 Kd8 76.Rf8) 1–0. Fournier,Frederic (1790) – maoramirez, Active, 2011.

4.a3 Bf6 5.Nf3 Be6 (5...e4!? 6.Bf6 Nf6+=) 6.d4= c6 (better is 6...ed4!? 7.Nd4 Bd7=) 7.de5+/– de5 8.Qd8 Kd8 9.Be5 Nd7 10.Bf6 Ngf6 11.c4 Ke7 12.Nc3 Rad8 13.Be2 Rhe8 14.c5 Nd5 15.Nd5 (15.Ne4!? Rf8+–) 15...Bd5 16.0–0 Kf8 17.Rfe1 f6 18.Rad1 Re7 19.Nd4 g6 20.Bf3 Bf3 21.Nf3 Rde8 22.Rd3 Ne5 23.Ne5 Re5 24.Red1 b6 25.cb6 ab6 26.Rd6 R5e6 27.g3 b5 28.R1d3 f5 29.Kg2 h5 30.h4 Kf7 31.Rd7 Kf6 32.R7d6 Ra8 33.Re6 Ke6 34.f4 Ra7 35.Kf3 Ra6 36.e4 fe4 37.Ke4 Kf6 38.Rd6 Kg7 39.Rd3 Kf6 40.Rc3 Ke6 41.Kf3 Kd6 42.g4 hg4 43.Kg4 Ke6 44.Kg5 Kf7 45.Re3 Ra7 46.Rd3 Kg7 47.Rd6 Ra3 48.Rg6 Kf7 49.Rc6 Ra4 50.Rc7 Ke8? 51.h5 Rb4 52.f5 Rb1 53.Kf6 b4 54.Rb7 b3 55.h6 b2 56.h7 Rh1 57.Rb2 Rh7 58.Rb8 Kd7 59.Rb7 Kc6 60.Rh7 Kc5 61.Rd7 Kc4 62.Ke6 Kc5 63.f6 Kc6 64.f7 Kc5 65.f8Q Kc4 66.Qc8 Kb3 67.Rb7 Ka4 68.Qa8 1–0. Fournier,Frederic (1815) – ticoman (1755), Active, 2011.

4.a3 Nf6 (--> 1.b4 e5 2.Bb2 Nf6 3.a3 d6 4.e3 Be7).

4.a4 Bf5 5.b5 Nf6 6.d3 0–0 7.e4 Be6 8.c4 Nbd7 9.Nf3 Nc5 10.Ng5 Bg4 11.h3?? Bd1–+ 12.Kd1 Rc8 13.Nc3 Qd7 14.Nd5 Nd5 15.ed5 Bg5 16.Be2 Bf4 17.g3 Bg5 18.h4 Bf6 19.Ba3 Na4 20.Bb4 Nb6 21.Ra7 Rb8 22.Ra1 e4! 23.Ra3 ed3 24.Bd3 Rbe8 25.Bd2 Bd4 26.Rf1 g6 27.f4 f5 28.Ra2 Re7 29.Ra7 Nc4! 30.Bc4 Ba7 0–1. TD_6 – babylyub, ICS rated blitz match, 1998.

4.b5 b6 5.Be2 (5.Qf3!? c6 6.bc6+= Qc7 7.d4 Nf6 8.d5 a6 9.Bd3 Bg4+/–) 5...Nf6= (5...a6 6.d4 Bb7 7.Nf3 e4 8.Nfd2 ab5 9.Bb5 c6=) 6.Nf3 (6.d4 e4 7.d5 a6 8.Nc3 0–0 9.f3 Bf5=; 6.c4 0–0 7.Nf3 a6 8.0–0 ab5 9.cb5 c5=; 6.a4 0–0 7.Nf3 a6 8.0–0 c5 9.d3 Be6=; 6.Nc3 a6 7.a4 d5 8.Nf3 Bd6 9.0–0 c6+=) 6...h6 (6...a6 7.c4= ab5 8.cb5 0–0 9.Qc2 Bb7=) 7.d4 (7.0–0 a6 8.a4 0–0 9.Nc3 Bf5=) 7...e4 8.Nfd2 d5 (8...a6 9.d5 0–0=) 9.0–0 (9.c4 dc4=) 9...c6 (9...a6=) 10.a4 a5 (10...a6 11.c4=) 11.c4+= h5 (11...cb5 12.ab5 0–0 13.f3+=) 12.f3 (12.bc6!? Be6 13.Nc3 Nc6 14.cd5 Bd5 15.Nd5 Qd5 16.Rc1+/–) 12...ef3+= 13.Nf3 Qc7 (13...h4 14.Ne5 h3 15.g3 (worse is 15.Nc6 Nc6 16.bc6 hg2–/+) 15...cb5 16.ab5+=) 14.Nc3 Ng4 15.Qc1 Bg5 (15...dc4!? 16.Bc4 Bd6+/–) 16.Nd1+– Nd7? (better is 16...dc4 17.h3 Be7 18.hg4 hg4+–) 17.Ne5?? (better is 17.cd5 c5 18.dc5+–) 17...Nde5 (17...cb5 18.cd5 Qc1 19.Rc1 Nde5 20.de5 Ne3 21.Bb5 Kf8 22.h4+=) 18.de5 f6? (better is 18...Be6=) 19.cd5+– fe5 (19...c5 20.d6 Qd7 21.Bf3+–) 20.Bg4 (20.h3 Nf6 21.Qc6 Qc6 22.dc6 e4+–) 20...hg4 (20...Bg4 21.Qc6 Qc6 22.bc6+–) 21.Qc6 Qc6 22.dc6 (22.bc6 Bf6 23.e4 Ba6+–) 22...Bf6 23.Nf2 (23.Nc3 Be6+–) 23...Be6 (23...Bf5 24.e4 Be6 25.Rfd1+–) 24.Ne4 Ke7 (24...0–0 25.Rac1+–) 25.Ba3 Kf7 (25...Kd8 26.Nf6 gf6 27.Rf6+–) 26.Bd6 (26.Ng5 Kg6 27.Ne6 Rae8+–) 26...Rh6 (26...Bc4 27.Rfc1 Bd3 28.Nf6 gf6 29.Bc7+–) 27.Be5 (better is 27.Ng5! Kg8 28.Ne6 Rc8+–) 27...Rah8 (27...Bd5 28.Rf4 Be4 29.Re4+–) 28.Rac1 (28.Bc7 Rh5+–) 28...g3 (28...Bd5 29.Nc3 Bc4 30.Rf4+–) 29.Bg3 Rh5 (29...Rg6 30.c7 Ke7 31.Nf6 Rg3 32.Ng8 Rg8 33.hg3+–) 30.c7 Kg6 (30...Ke7 31.Nf6 gf6 32.Rc6+–) 31.Nf6 (31.Rc6 Kf7+–) 31...gf6 32.Rc6 Re8 (32...Kf7 33.Rb6 Rg5 34.Ra6+–) 33.Rd1 (better is 33.Re6 Re6 34.c8Q+–) 33...Rc5 34.Rc5 bc5 35.Rd8 Re7 36.b6 (36.b6 c4 37.b7 Rc7 38.Bc7+–) 1–0. Luettig,Hendrik – Techmann,Hans, HMM, 1999.

4.b5 Bd7 5.Nf3 Nf6 6.c4 0–0 7.Be2 c6 8.a4 a6 9.Nc3 ab5 (9...e4 10.Nd4=) 10.ab5 Ra1 11.Qa1 cb5 (11...e4 12.Nd4=) 12.cb5 Qb6 (12...Bg4 13.0–0=) 13.0–0 Be6 14.h3 (14.Ng5 Bb3=) 14...Nbd7 15.d4 e4 16.Ng5 Bf5 17.f3 d5 (17...ef3 18.Bc4= (worse is 18.gf3 d5–/+)) 18.fe4 Be4 19.Nge4 (better is 19.Qa2=) 19...Ne4? (better is 19...de4!? 20.Bc4 Qc7=) 20.Nd5+/– Qe6 21.Ne7 Qe7 22.Ba3 (22.Ba3 Qg5 23.Rf4+/–) 1–0. GuestLYYS – GuestLZDJ, freechess.org, 2016.

4.b5 Nf6.

4.Nc3 Be6 5.Nf3 Nf6 6.Be2 0–0 7.0–0 Nc6 8.a3 a6 9.d3 Nd5 10.e4 Nf4 11.Bc1 Bg5 12.Be3 Ne2 13.Qe2 Bg4 14.Bg5 f6? (better is 14...Bf3 15.Bd8 Be2 16.Bc7 Bf1 17.Kf1 Rfe8=) 15.Be3+– f5 16.Kh1 fe4 17.Ne4 Bf3 18.gf3 Rf5 19.Ng3 Rf7 20.Qd2 Rf3 21.c4 Nd4 22.Bd4 ed4 23.Qe2 Qf6 24.Ne4 Qe5?? (24...Qf5+–) 25.Qf3 Rf8 26.Qg2 1–0. Darkseid – Mr.Oldenslo, ChessWorld.net, 2012.

4.Nc3 Nf6 5.Bc4 0–0 6.Nd5 Nd5 7.Bd5 Be6 8.Bb7 Nd7 9.Ba8 Qa8 10.f3 e4 11.Qe2 ef3 12.Nf3 Bg4 13.0–0 Bf3 14.Qf3 Qf3 15.Rf3 Ne5 16.Be5 de5 17.a3 (17.a3 c5 18.d3+–) 1–0. babai – ovverlord, internet, 2007.

4.c4 Na6 5.a3 b5?? (5...Nf6!?=) 6.Nf3 (better is 6.Qf3!? d5 7.cd5+–) 6...bc4+= 7.Bc4 Qd7 (7...c6 8.e4+=) 8.0–0 (8.Be5 Nf6 9.Bf6 Bf6+/–) 8...Nf6 9.Nc3 (better is 9.Be5 de5 10.Ne5+/–) 9...c5?? (9...Rb8 10.Qe2 Rb6 11.b5+=) 10.b5 (better is 10.Bb5 cb4 11.Bd7 Bd7 12.ab4 Nb4 13.Ba3+–) 10...Nc7= 11.d3 a6 12.a4 ab5 13.Bb5 (13.ab5!? 0–0 14.Qc2+=) 13...Nb5= 14.ab5 Ra1 15.Qa1 Ng4 (15...Qb7 16.Qa4=) 16.Nd5 (16.Qa8 0–0 17.Qc6 Qd8+=) 16...Qb7 (16...Bb7!? 17.Ne7 Ke7+=) 17.Ne7 Ke7 18.h3 (18.d4!? cd4 19.ed4+=) 18...Nf6= 19.Rb1 (better is 19.Ne1=) 19...Qb5?? (better is 19...Bh3 20.Be5 Ra8 21.Bd6 Kd6 22.Qe5 Kd7 23.Qc5 Be6+=) 20.Be5+/– Qd3 21.Bf6 (21.Rd1!? Qd1 22.Qd1 de5 23.Ne5+–) 21...gf6= 22.Qa7 Bd7 23.Rb7 Qf5 (better is 23...Rd8=) 24.e4! Qe5?? (24...Qe4 25.Rd7 Double attack (25.Rd7 Deflection)) 25.Nd2 (25.Rd7 Ke8 26.Ne5 fe5 27.Rf7 d5 28.Qd7) 25...Rg8?? (better is 25...Rd8=) 26.Rd7+– Ke6 27.Re7 1–0. GuestJNVY – GuestWDPB, freechess.org, 2017.

4.c4 Be6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Be6 4.e3 Be7).

4.c4 h6 5.Nc3 (5.Nf3 Nf6+=) 5...c6 (5...Nf6 6.Be2=) 6.Nf3 (6.d4 ed4 7.Qd4 Nf6=) 6...Nf6 7.d3 (7.Bd3 Qb6 8.a3 0–0=) 7...0–0 (7...Nbd7 8.Be2=) 8.Be2 Bg4 (8...Nbd7 9.0–0=) 9.0–0 Bf3 (9...Nbd7 10.a3=) 10.Bf3+= (worse is 10.gf3 d5=) 10...Nh7 (10...d5 11.b5 Qd7 12.bc6 bc6 13.Rb1+=) 11.Ne4 (11.a3 Ng5+=) 11...Nd7 (11...f5 12.Nc3+=) 12.Rc1 (12.d4 f5 13.Nc3 Ng5+=) 12...Ndf6 (12...f5 13.Nc3+=) 13.a3 (13.b5 Ne4 14.Be4 Qb6+=) 13...Ne4 14.Be4 Ng5 (14...f5 15.Bf3+=) 15.Bf5 Bf6 (15...g6 16.Bg4+=) 16.h4 (16.d4 ed4 17.Bd4 Ne6+=) 16...Nh7 (16...Ne6 17.h5+=) 17.h5 Ng5 18.Qg4 Nh7 (18...a5 19.b5+=) 19.c5 (19.f4 Re8+=) 19...d5 (19...Ng5 20.f4 ef4 21.Bf6 Qf6 22.Qf4+= (worse is 22.Rf4 Qb2 23.Rff1 dc5+=)) 20.Bh7+/– Kh7 21.Be5! Be5 22.Qf5 Kg8 23.Qe5 Re8 (23...Qh4 24.Qf5+/–) 24.Qf5 Re6 25.d4 Qc7 (25...Rf6 26.Qg4+/–) 26.b5! Rf6 (26...cb5 27.Qd5 Deflection) 27.Qd3 Qd7 (27...Re8 28.bc6 bc6 29.Rb1+/–) 28.bc6 (28.Rb1 Rf5 29.bc6 bc6+/–) 28...bc6 (28...Rc6 29.Rc3+/–) 29.Rb1 Rf5 30.Rb7! Qe6 (30...Qb7 31.Qb1 Double attack (31.Qf5 Deflection; 31.Qb1 Decoy)) 31.Rfb1+– Qe4? (better is 31...Qc8+–) 32.Qe4 de4 33.Rc7 Rf6 (33...Rh5 34.Rbb7+–) 34.Rbb7 a5 (34...Kf8 35.Ra7 Ra7 36.Ra7+–) 35.Rb6 a4 (35...Rf5 36.Rbc6 Kf8 37.Rd6 Rh5 38.Rdd7+–) 36.Rbc6 Rc6 37.Rc6 Rb8 (37...Kf8 38.Rc7+–) 38.Rb6 (38.Ra6 Rd8+–) 38...Rc8 (38...Rd8 39.c6 Kh7 40.Ra6+–) 39.Ra6 Kh7 (39...Kf8 40.Ra4 Ke7 41.f3 ef3 42.gf3+–) 40.Ra4 (40.c6 Rd8+–) 40...Rc6 (40...g6 41.Rc4 Ra8 42.c6+–) 41.Rc4 f6 (41...Rc8 42.c6 g6 43.d5+–) 42.d5 (42.d5 Rc7 43.c6+–) 1–0. Wall,Bill – Vail, internet, 2005.

4.Bc4 Nf6+= 5.Ne2 (5.a3 Nbd7+=) 5...Nc6 (5...a5 6.ba5 d5 7.Bb3+=) 6.a3= 0–0 7.b5 (7.0–0 d5 8.Bb3 Qd6=) 7...Na5+= 8.Ba2 b6 (8...a6 9.ba6 ba6 10.d4+=) 9.d3 (9.0–0 a6 10.a4 c5+=) 9...Bg4 (9...Qd7 10.Nbc3+=) 10.Nbc3 (10.0–0 a6+=) 10...Qd7 (10...a6 11.f3 Bc8 12.ba6 Ra6 13.0–0+=) 11.f3= Be6 12.a4 (12.Be6 Qe6 13.e4 a6=) 12...a6+= 13.e4 Ba2 14.Ra2 Nb7 (14...d5 15.f4 ef4 16.Nf4 de4 17.de4 Qd1 18.Kd1+=) 15.Qa1 a5 (15...Rfe8 16.f4=) 16.0–0+= Rae8 17.f4 ef4 (17...Nc5!?=) 18.Nf4+/– (worse is 18.Rf4 d5=) 18...Nc5 19.Ra3 Ne6 20.Ncd5 Nd5 (20...Nf4 21.Ne7 Re7 22.Rf4+=) 21.Nd5+/– (21.ed5?! Nf4 22.Rf4 f5=) 21...f6 (21...Bg5 22.Rf5 f6 23.Qd1+/–) 22.d4 (22.Rf5 Rf7+/–) 22...Bd8 23.Rg3 (23.Re3 c6 24.bc6 Qc6+=) 23...Rf7 (23...Ng5 24.Qa2 Rf7 25.Nf4+=) 24.Ne3 (24.Bc1 Ng5 25.Bg5 fg5 26.Rf7 Qf7+/–) 24...Nf8 (24...Ng5!? 25.e5 fe5 26.de5 Rf1 27.Nf1 d5=) 25.Nf5+/– Ng6 26.Rg4 (26.Qe1 d5 27.Re3 de4 28.Re4 Be7+/–) 26...d5+= 27.Qe1 Qe6 (27...Kh8 28.c4 dc4 29.Qe2+=) 28.h4 Rd7? (better is 28...Kh8!?+=) 29.h5+– Nf8 30.Qg3 g6 (30...de4 31.c4! Ng6 (31...Qc4?? 32.Rg7 Kh8 33.Rd7+–) 32.hg6 Qc4 33.gh7 Kh8 34.Rg7 Qf7 35.Rf7 Rf7 36.Qg6 Be7 37.Qf7 c6 38.Qg7) 31.Bc1?? (better is 31.hg6 hg6 32.c4+–) 31...de4+= 32.Rff4 (32.hg6 Ng6 33.Rg6 hg6+–) 32...g5 (32...Kf7 33.Nh6 Kg7 34.Re4 Qe4 35.Re4 Re4 36.c3=) 33.Nh6 (33.Re4 Qe4 34.Re4 Re4 35.Qb3 Kh8+/–) 33...Kg7 (better is 33...Kh8 34.Re4 Qe4 35.Re4 Re4+=) 34.Rf5?? (better is 34.Re4 Qe4 35.Re4 Re4 36.Nf5 Kg8 37.Qb3 Kh8 38.Qc3+/–) 34...Kh6–+ 35.Rfg5 fg5 36.Bg5 (36.Rg5 e3 37.Re5 Qe5 38.de5 Rd1 39.Kh2 Rc1 40.Qe3 Bg5 41.Qc3–+) 36...Kg7 (better is 36...Bg5 37.Rg5 Qd6–+ (37...Rd4 38.Qe3 Rd1 39.Kh2 Qe5 40.Re5 Kg7 41.Qg3 Ng6 42.Re8+–)) 37.Bf6?? (37.Bf6 Kf6 38.c4 Qg4 39.Qg4 Rd4 40.Qf4 Kg7 41.h6 Kg8 42.Qg3 Ng6 43.Qe3 Rc4 44.Kf1–+; 37.Bd8 Ng6 38.Bc7 Rd4 39.hg6 hg6 40.Rh4–+). Ben Zur,Raanan – McCrea,James, Labor Day Festival op, 1993.

4.d4 Nc6 5.b5+/– Nb8 6.de5 de5 7.Qd8 Bd8 8.Be5 f6 9.Bb2 Ne7 10.Nf3 c6 11.Nc3 0–0 12.Bc4+– Kh8 13.Nd4 Ba5 14.0–0 Bd7 15.Ne4 cb5 16.Nb5 a6 17.Nbd6 h6 18.Nb7 Bb6 19.Ba3 Nbc6 20.Rab1 Bc7 21.Nec5 Bf5 22.e4 Bh7 23.Ne6 Be4 24.Nc7 (24.Nc7 Bc2 25.Rb2+–) 1–0. Alissa – sandtheory, ChessWorld.net, 2005.

4.d4 f6 5.Bd3 Nh6 6.Qh5 Nf7 7.d5 Qd7 8.Bf5?? (better is 8.Nc3=) 8...Qf5–+ 9.Qe2 0–0 10.Nf3 Ng5 (10...Qg4 11.Nc3–+) 11.Nh4 (11.Ng5 Qg5 12.0–0–+) 11...Qe4 12.0–0 (12.f4 ef4 13.ef4 Qb4 14.Nd2 Re8–+) 12...Qh4 13.f4 Nh3! 14.gh3 Bh3 15.Rf2 e4 16.Nd2 Bg4 (16...f5 17.Qb5 b6 18.Bd4–+) 17.Qe1 (17.Qc4 Rc8 18.Qe4 Re8–+) 17...Nd7 18.Ne4 Bf5 19.Ng3 Bg6 20.Rd1 Nb6 21.Rd4 f5 22.Rg2 (22.e4 c6–+) 22...Bf6 23.Qd2 Rae8 24.c4 Bd4 25.Qd4 Qf6 26.Qd3 Qe7 27.Bd4 White prepares the advance c5 27...c5 28.dc6 bc6 29.c5 Nc8 30.cd6 Qd6 31.Qc4 Qd5 32.Qc3 (32.Qd5 cd5 33.h4 Re6–+) 32...Rf7 33.h4 Qf3 34.Qb3 Nb6 (better is 34...Kf8–+) 35.h5 Nd5 36.hg6 hg6 37.Nf1 Qh5 38.b5 Rb8 39.a4 a5 (39...Rd7 40.Be5 Rc8 41.Qc4–+) 40.Qa3 (40.Be5!? Rb6 41.Qc4–/+) 40...Nb4 41.Be5 Rd8 42.b6 Rd1 43.e4 (43.Qb3 Qf3 44.Rf2 Qg3 45.Rg2 Qe1–+) 43...Rf1! 44.Kf1 Qd1 (44...fe4 45.Qb3 e3 46.Qe3+=) 45.Kf2 Nd3 46.Ke3 (46.Kg3 g5 47.Qd6 gf4 48.Kh2 Qh5 49.Kg1 Ne5 50.Qe5 Qd1 51.Kh2–/+) 46...Ne5 47.fe5 (47.Kf2–+) 47...fe4 48.Ke4 Qd5 49.Ke3 Rf3 50.Ke2 Ra3 51.b7 Qg2 52.Kd1 Ra1 0–1. mikebaldini – doctorfeelgood (1720), gameknot.com, 2013.

4.Be2 d5 5.b5 (5.Be5 Nf6+=) 5...b6 (5...Nd7 6.Nf3 Bd6 7.c4=) 6.Nf3 (6.Be5 Nf6+/–) 6...Bf6 (better is 6...f6!?=) 7.Ne5+/– Qd6 8.d4 Qb4 9.Bc3 Qd6 10.0–0 Ne7 11.Nd2 Nd7 12.f4 (12.Nd7 Qd7 13.a4 a6+/–) 12...Nf5 13.Rf3 Be5 (13...Nh4!? 14.Rg3 Ng6+/–) 14.fe5+– (14.de5?! Qc5 15.Bd4 Nd4 16.ed4 Qd4 17.Kh1 Nc5+/–) 14...Qg6 (better is 14...Qh6+–) 15.Bd3 Nf8 16.Qf1 Qh6 17.Rf5 (17.Bf5?! Bf5 18.Rf5 Qe3 19.Qf2 Qc3+–) 17...Bf5 18.Qf5 (worse is 18.Bf5 Qe3 19.Qf2 Qc3+=) 18...Qe3 19.Kh1 Ne6 20.Rf1 0–0–0 21.Qf7 (better is 21.Nb3 Qh6 22.Bd2+–) 21...Rhf8 (21...Nd4 22.Bd4 Qd4 23.Qg7 h5+–) 22.Qe6 Kb8 23.Rf8 (23.Nf3!? Rfe8 24.Qf7 Qh6+–) 23...Rf8 24.Qe7 (better is 24.Nf3 Qc1 25.Be1+–) 24...Qe1 25.Nf1 Rf1 26.Bf1 Qf1 0–1. GuestJWPC – GuestBGKC, freechess.org, 2017.

4.Ne2 b6 5.Ng3 (5.d4 d5 6.de5 (6.a3 e4 7.c4 c6 8.cd5 cd5 9.Nf4=) 6...Bb4 7.c3 Bc5 8.Nf4 Ne7 9.c4=) 5...Bb7 (5...Nf6 6.Be2 0–0 7.0–0 c6 8.c4 Re8 9.d4=; 5...c6 6.Be2 (6.Nh5 g6 7.Ng3 Nf6 8.Be2 h5 9.0–0=; 6.d4 d5 7.b5 ed4 8.Bd4 Nf6 9.Nh5=; 6.f4; 6.a3) 6...Nf6 7.0–0 0–0 8.c4 Be6 9.d4=) 6.Bb5 (6.d4 Nd7 7.Nh5 g6 8.Ng3 Ngf6 9.b5=) 6...Kf8 (6...c6 7.Be2= Nf6 8.0–0 0–0 9.Nf5=) 7.0–0+= a5 (7...a6 8.Be2 Nf6 9.d4+=) 8.ba5 (8.a3 Nf6 9.f4+=) 8...Ra5 9.a4 (9.Qe2+=) 9...Ba6 (9...Nf6 10.Bc3 Ra7 11.f4+=) 10.Ba6 Ra6 11.Nc3 Nd7 12.Nd5 Ngf6 (12...Ndf6 13.c4+=) 13.Nb4+/– Ra8 14.Nc6 Qc8 15.d4 Qb7 (15...ed4 16.Nf5 Bd8 17.Qd4+/–) 16.d5 (better is 16.Ne7 Ke7 17.Nf5 Kf8 18.de5 de5 19.Ba3 Ke8 20.Ng7 Kd8 21.Nf5+=) 16...g6? (better is 16...Nb8!? 17.Nb8 Rb8+/–) 17.f4+– h5 18.fe5 de5 19.Qf3 (19.Ne5?! Rh7 20.Qf3 Ne5 21.Be5 Nd7+–) 19...Rh7 (19...g5 20.Ne7 g4 21.Qf2+–) 20.Ne7 Re8 (20...Ke8 21.Be5! Ne5 22.Qf6+–) 21.Ba3 e4 (21...Qa8+–) 22.Ne4 Ne4 23.Qe4 Qa8 24.Qg6 1–0. Breustedt,Werner (2230) – Ruth,Walter, GER–chT Seniors, 1995.

4.Nf3 Nd7 5.c4 (5.Be2 a5 6.b5 Ngf6=) 5...b6 (5...Ngf6 6.Nc3=) 6.d4 ed4 (6...e4 7.Nfd2 Ndf6 8.d5=) 7.Nd4+= Bb7? (7...Ne5 8.Be2+=) 8.b5?? (better is 8.Ne6! fe6 9.Bg7+–) 8...Bf6= 9.Nd2 Ne7 10.a4 a6 11.N2f3 ab5 12.cb5 0–0 13.Qc2 (13.Be2 Nc5=) 13...Bf3 (13...Nc5 14.Bc4+=) 14.Nf3 Bb2 15.Qb2 Nc5 16.Qc2 Ng6 17.Be2 Qf6 18.0–0 Ra5 19.Ra2 (19.Rfd1 Rfa8=) 19...Ne5 (19...Rfa8 20.Rfa1+=) 20.Nd4 g6 (20...Rfa8 21.f4 Ned7 22.Bf3+=) 21.Rfa1 (21.f4 Ned7+=) 21...Re8 22.Nb3 Ra7 (22...Nb3 23.Qb3 Rea8 24.Rc1=) 23.a5 (23.Nc5 dc5 24.a5 Rd8+/–) 23...Ned7 (23...Nb3 24.Qb3 Ra5 25.Ra5 ba5 26.Ra5+/–) 24.ab6 (24.a6!?+/–) 24...Ra2+= 25.Ra2 cb6 26.Qd1 (26.Bf3 Ne5 27.Bd5 Rc8+/–) 26...Nb3 27.Qb3 Nc5 28.Qd5 Qe6 29.Qc6 (29.Bc4 Qd5 30.Bd5 Re5+/–) 29...Qa2+= 30.Qe8 Kg7 31.Bf1 Qa7 (31...Qe6 32.Qd8 d5 33.Be2+=) 32.Qc6 Qb7 (32...Qb8 33.Bc4+/–) 33.g3 (33.Qd6 Qa7+/–) 33...Qc6 34.bc6 Ne6 35.f4 (35.Kg2 d5+/–) 35...h5 36.Bc4 Nc7 37.e4 Kf6 38.Kf2 b5 39.Bd5 Ke7 40.Ke3 f5 41.Kd4 Nd5 (better is 41...b4+=) 42.ed5+– (42.Kd5?! fe4 43.Ke4 b4=) 42...Kd8 43.Kc3 Kc7 44.Kb3 Kb6 45.Kb4 Ka6 46.c7 (better is 46.h4!?+–) 46...Kb7+= 47.Kb5 Kc7 48.Ka6 (48.Ka6 g5 49.fg5+–) 1–0. Hauck,Bjoern – Kahl,Klaus Dieter, RH–chC Ingelheim, 1991.

4.Nf3 f5 5.d4 e4 6.Nfd2 d5 7.b5 Nf6 8.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.d4 e4 7.Nfd2 d5 8.b5).

4.Nf3 h6 5.b5 Bf6 (5...a6 6.Be2=) 6.c4 (6.d4 ed4 7.Nd4 a6=) 6...Bg4 (6...e4 7.Nd4=) 7.Be2 (7.e4 Nd7=) 7...Ne7 (7...Bf3 8.Bf3 e4 9.Bf6 Nf6 10.Be2=) 8.h3 (8.d4 ed4 9.Nd4 Be2 10.Qe2 Nd7=) 8...Be6 (8...Bf3 9.Bf3 e4 10.Bf6 ef3 11.Be7 fg2 12.Rg1 Qe7 13.Qf3=) 9.0–0 (9.d4 Nd7=) 9...c6 (9...a6 10.d4 ed4 11.Nd4=) 10.a4 (10.d4 e4 11.bc6 Qb6+= (worse is 11...Nec6 12.Nfd2+/–)) 10...b6 (10...0–0 11.d4+=) 11.Nc3 (11.d4 ed4 12.Nd4 0–0+=) 11...0–0 (11...e4 12.Nd4 Bd4 13.ed4+=) 12.Ne4 Ng6 13.Nf6 (13.d4 Bf5 14.Bd3 a6+/–) 13...Qf6 14.Qc2 (14.d4 e4 15.Nd2 d5+=) 14...c5 (14...a6 15.d4 Rc8 16.a5 ab5 17.ab6 Ra1 18.Ra1 bc4 19.Ra8+=) 15.Ne1 (better is 15.a5 Nd7 16.Bd3+=) 15...d5? (15...Bf5 16.d3 a6+/–) 16.f4!+– Bf5 (16...ef4 17.Bf6 Pinning (17.Bf6 Deflection)) 17.Nd3?? (17.fe5 Bc2 18.ef6+– (18.Rf6?! gf6 19.Nc2 fe5=)) 17...Qh4 (17...Nh4!? 18.Be5 Qg6+=) 18.fe5 Bh3 (better is 18...Be4+–) 19.Ne1 (better is 19.Bf3!? Be6 20.cd5+– (20.Bd5?! Bd5 21.cd5 Qe4+/–)) 19...Qg5 (19...Be6+=) 20.Rf3 (better is 20.Bf3 Nd7 21.Bd5+/–) 20...Bg2?? (better is 20...Bd7=) 21.Ng2+– Nh4 (21...Nd7 22.Rf5 Qg3 23.cd5 Nde5 24.Qc3+–) 22.Rf2 Nd7 23.Kh1 (23.cd5 Ne5 24.a5 Rad8+–) 23...Ng2 (23...Ne5 24.Nh4 Qh4 25.Rh2+–) 24.Rg2 Qh4 25.Kg1 (better is 25.Rh2 Qe4 26.Qe4 de4+–) 25...d4 (25...Rae8 26.Qf5 Qe7 27.d4 dc4 28.Bc4+–) 26.Qf5 Rae8 (26...Qe7 27.ed4 cd4+–) 27.Qd7 (better is 27.Bd3 Qf2 28.Kf2+–) 27...Re5 28.Qg4 (better is 28.ed4!? Rg5 29.Bg4 h5+–) 28...Qh3 1–0. DEFFM – GuestCWXB, freechess.org, 2016.

4.f4 Nc6 5.b5+= Nb8 (5...Nb4 6.a3 Nd5 7.fe5 de5 8.e4=) 6.fe5 de5 7.Be5 Bf6 (7...Bh4 8.g3 Bf6 9.Bf6 Nf6 10.Nf3+=) 8.Nf3 Be5 (8...Be6 9.Nc3+/–) 9.Ne5 Nd7 (9...Qf6 10.d4+=) 10.Nc4 (10.Nd7 Bd7 11.Qf3 c6+/–) 10...Nh6 (10...Qh4 11.g3 Qe4 12.Rg1+=) 11.Qh5 (11.Qf3 a6 12.Nc3 0–0+/–) 11...Nf6 (11...Qf6 12.Nc3+/–) 12.Qf3 (12.Qg5 0–0+/–) 12...0–0 13.Bd3 Nhg4 (13...a6 14.ba6 Ra6 15.Nc3+/–) 14.0–0 (14.h3 Nh6+/–) 14...Qd5 (14...a6 15.ba6 Ra6 16.Nc3+/–) 15.Qg3 Ne4 (15...Qd8 16.h3 Nh6 17.Nc3+/–) 16.Qc7+– Ngf6 (16...Be6 17.Be4 Qe4 18.d3+–) 17.b6 (17.Na5 Be6+–) 17...a6 (17...Be6 18.Be4 Ne4 19.d3+–) 18.Ne5 (18.Be4 Ne4 19.d3 Be6+–) 18...Be6 (18...Re8 19.Nf3+–) 19.c4 Qc5 (19...Qa5 20.Be4 Ne4 21.d4+–) 20.Be4 Qc7 (20...Ne4 21.Qc5 Nc5 22.d4+–) 21.bc7 Ne4 22.Rf4 (22.d3 Nd6+–) 22...Ng5? (better is 22...Nd6+–) 23.h4 (23.h4 f6 24.Nd3+– (24.hg5?! fe5 25.Rf8 Rf8+/–)) 1–0. Wall,Bill – SurfRook, internet, 2005.

4.f4 ef4 5.Bg7+/– (< 5.ef4 Nf6=+) 5...Bf6 6.Bh8 Bh8 7.d4 (7.c3 Qh4 8.Ke2 fe3 9.de3 Bg4 10.Nf3 Nc6+=) 7...fe3 (better is 7...Qh4 8.Ke2 fe3 9.Ke3 Qe7 10.Kf2 Qh4 11.Ke3 Qe7 12.Kd2 Bd4=) 8.Qe2?? (better is 8.c3+=) 8...Bd4–/+ 9.c3 Bb6 (9...Qf6 10.Kd1–/+) 10.Qd3 (10.Qc2 Qh4 11.g3=+) 10...Nc6 (better is 10...Qh4!? 11.g3 Qf6 12.Qe4 Ne7–/+) 11.Qh7= Qg5 12.Nf3 (12...Qg4 13.Bc4=) 1–0. b4_player (1985) – haiku1 (1680), GameColony.com, 2002.

4.f4 Bf5 5.fe5 de5 6.Be5 Nc6? 7.Bg7+– (7…Bh4 8.g3+–) 1–0. Hyperboleweevil (1900) – guest433, ICC, 2003.

4.f4 Nf6=+.

4.f4 Bh4 5.g3 Bf6 6.fe5 de5 7.Nc3 Be7 8.Nf3 Nd7 9.a3=.

4.g3 Nf6 5.Bg2 c6 (5...c6 6.f4 e4=+; 5...Nbd7 6.Ne2=+). makaveli1982 – Codeman, internet, 2007.

4.b5 Bf6

5.c4 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Ne7 (8...Bf5 9.Nf3=) 9.Nf3 0–0 (9...Bf5 10.Be2=) 10.Be2 (10.d4 ed4 11.Bd4 Nf5=) 10...Bg4 (10...e4 11.Nd4+=) 11.h3 (11.0–0 Re8=) 11...Bf5 (11...Bf3 12.Bf3 e4 13.Bf6 ef3 14.Be7 fg2 15.Rg1 Qe7 16.Qf3= (worse is 16.Rg2 Qe4 17.Rg4 Qh1 18.Ke2 Qh3+=)) 12.Nc3 (12.g4 Bb1 13.Qb1 Ng6=) 12...c6 (12...e4 13.Nd4 Bd4 14.ed4+=) 13.d3 (13.g4 e4 14.gf5 ef3 15.Bf3 Nf5+=) 13...Qa5 (13...Be6 14.Ne4=) 14.0–0+= e4? (better is 14...d5!?+=) 15.de4 (15.Ne4 Ba1 16.Qa1 Qc7+–) 15...Bc3 (15...Be6 16.Qd2+/– (16.Qd6?! Rd8 17.Qd8 Qd8+=)) 16.Bc3 (16.ef5 d5+–) 16...Qc3 17.ef5 Nf5 (17...d5+/–) 18.Qa4 (better is 18.e4!? Nh6 19.Qd6 cb5 20.cb5+–) 18...Rc8 (better is 18...Re8!?+=) 19.Qa7 1–0. DEFFM – newbeginner, freechess.org, 2016.

5.Nf3 e4 6.Nd4 Nh6 (6...a6 7.Nc3 Bd4 8.ed4=) 7.c4 (7.Nc3 d5=) 7...0–0 (7...c5 8.bc6 Nc6 9.d3=) 8.Be2 (8.Qc2 Re8+=) 8...c6 (better is 8...c5 9.bc6 Nc6 10.Nc6 bc6+=) 9.a4? (better is 9.Nc3=) 9...c5–+ 10.Nc6? (better is 10.Nc3 cd4 11.Ne4–/+) 10...bc6 (10...Nc6 11.Nc3 Nb4 12.0–0–+) 11.Qc2 (11.Nc3 a6–+) 11...Bb2 12.Qb2 d5 (12...Qg5 13.g3–+) 13.cd5 (13.0–0 Qg5 14.f3 Bh3–+) 13...cd5 14.0–0 d4 (14...Qd6 15.f3–+) 15.ed4 (15.f3 Bf5–+) 15...Qd4 16.Nc3 (16.Qd4 cd4 17.d3 Bb7–+) 16...Bg4 17.Qc2 Re8 (17...Bf5 18.a5–+) 18.Rfe1 Nd7 19.Bf1 (19.Rac1 Nf6–+) 19...Nf6 (19...Bf5 20.h3–+) 20.Re3 (20.Rac1 Re5–+) 20...Nf5 (20...Rad8 21.h3 Bc8 22.d3–+) 21.Ree1 (21.h3 Bh5 22.g4 Bg4 (22...Ne3?! 23.de3 Qe5 24.gh5–+) 23.hg4 Ng4–+) 21...Rad8 22.h3 Bh5 23.g4 (23.a5 Qd2 24.Qd2 Rd2–+) 23...Nh4 (23...Qd2?! 24.Qd2 Rd2 25.gf5–+) 24.gh5 (24.Be2 Bg6 25.Rac1 e3 26.de3 Re3–+) 24...Nf3 25.Kg2 Ne1 (better is 25...Re5 26.h4 e3 27.Ne4 Re4 28.fe3–+) 26.Re1 Qd2 27.Qd2 Rd2 28.Re2 (28.Re3 Re5 29.Be2 h6–+) 28...Re2 29.Be2 e3 (29...Rd8 30.a5–+) 30.fe3 (30.a5–+) 30...Re3 1–0. DEFFM – Gestaut, freechess.org, 2016.

4.Bb5 c6

5.Bc4 d5 =+.

5.Be2 Nf6 6.c4 0–0 7.Nf3 b6 8.0–0 a6 9.Qc2 Be6 10.a4 Nbd7 11.b5 cb5 12.cb5 ab5 13.ab5 Ra1 14.Ba1 Nc5 15.d4 e4 16.dc5 dc5?? 17.Ne5 Bd6 18.Nc6 Qc7 19.Bf6 gf6 20.h3 Bf5 21.Nc3 Re8 22.Nd5 Qc8 23.Nf6 Kf8 24.Nh7 Kg7?? 25.Ng5 Bg6 26.h4 Qf5 27.Nh3 Qf6 28.g3 Qe6 29.Nf4 Bf4 30.ef4 Qh3 31.Ne5 Bf5 32.Bg4 Bg4 33.Ng4 Qg4+= 34.Qc3 f6 35.Qd2 Kf7 36.Qd7?? Re7 37.Qg4+– (37...e3 38.h5+–) 1–0. GULP – LORDVADER05, Live Game Caissa's Web, 2004.

4.c4 a6

5.a4 Bf6 6.d3 Nc6 7.b5 ab5 8.ab5 Ra1 9.Ba1 Nb8 10.Nc3 c6 11.Nf3 cb5 12.Nb5 e4 (better is 12...Bg4+=) 13.de4+– Ba1 (13...Qa5 14.Nd2 Ke7 15.Nd6 Kd6 16.e5 Ke7 17.ef6 Nf6 18.Bd3+–) 14.Qa1 (14.Nd6 Kf8 15.Qd2 Bc3 16.Qc3 Qd6+=) 14...Nf6 15.c5! dc5 (15...0–0 16.Nd6 Qc7 17.Qa7+–) 16.Qe5 Be6 17.Nd6 Ke7? (17...Kf8 18.Nb7 Qc8 19.Qc5 Qc5 20.Nc5 Nbd7 21.Ne6 fe6+–) 18.Nf5 Ke8 19.Bb5 Nbd7 (19...Nc6 20.Bc6 bc6 21.Ng7 Kf8 22.Nh5 Qa5 23.Nd2 Ne4 24.Qe4 Qa1 25.Qb1 Qb1 26.Nb1+–) 20.Ng7 Kf8 21.Ne6 Ke7 22.Nd8 Kd8 (22...Ne5 23.Nb7 Nf3 24.gf3 Rb8+–) 23.Bd7 Kd7 24.Ke2 Ra8 25.Rd1 Kc8 (25...Nd5 26.Rd5 Kc6 27.Rc5 Kb6 28.Qd6 Ka7 29.Ra5) 26.Qc5 Kb8 27.Rd8 1–0. Janek – Kevin, internet free game, 2016.

5.a4 Nf6 6.b5 ab5 7.cb5 b6 8.Nf3 Bb7 9.Bc4 0–0 10.h3 h6 11.Qb3 (11.d3 d5 12.Bb3 e4 13.de4 de4=) 11...Bf3 12.gf3 Nbd7 13.Ba3 Nh7 14.Nc3 Ng5 15.Ke2 (15.Bd5 Ra5=) 15...Nc5 16.Bc5 dc5 (worse is 16...bc5 17.a5+=) 17.Rag1 Qd7 18.h4 Ne6 (18...Nh7!?=) 19.Rg6+= fg6?? (better is 19...Rad8 20.Ne4 Kh7 21.Be6 fe6+=) 20.Be6+– Qe6 21.Qe6 (21.Qe6 Rf7 22.Qe5+–) 1–0. Heini – chessenemy, internet, 2016.

5.a4 Nf6 6.d4+=.

5.a4 h6 6.Nf3 (6.d4 ed4 7.ed4 d5=) 6...Bf6 7.Nc3 Bg4 8.h3 Bh5 9.Bd3 Ne7 10.0–0 Bg6 (10...Nbc6 11.b5 ab5 12.ab5+=) 11.Bg6+= Ng6 12.Ne4 Nd7 13.d4 White prepares c5 13...ed4 14.ed4 0–0 15.Qb3 Re8 16.Rfe1 Kh8 (16...Be7 17.d5+=) 17.c5+/– dc5 (17...Kg8 18.cd6 (18.Nf6?! Qf6 19.d5 Nde5+=) 18...c6 19.Nc5+– (worse is 19.Nf6 Qf6 20.Ne5 Red8+/–)) 18.Qf7 (18.dc5?! Bb2 19.Qb2 Nde5 20.Ne5 Re5=) 18...Kh7 (18...Nf4 19.Nf6 Nf6 20.dc5+–) 19.bc5 Ndf8 (19...Re7 20.Qb3+–) 20.Ra3 (20.Nf6 Qf6 21.Qc7+– (21.Re8?! Qf7 22.Ra8 Qb3=)) 20...Re7?? (better is 20...Nd7+–) 21.Nf6 Kh8 22.Qg8 1–0. fryckh – jaqufe, internet, 2017.

5.Nc3 Nf6 6.d4 ed4 7.ed4 (worse is 7.Qd4 Nc6 8.Qd3 Nb4–/+) 7...0–0 8.Bd3 (8.Nf3 Re8+=) 8...d5 (8...Nc6 9.Nf3–/+) 9.a3 (9.Qb3 dc4 10.Bc4 Nc6–/+) 9...dc4–/+ 10.Bc4 b5 (10...Re8 11.Nge2–/+) 11.Bd3 (11.Qf3 Ra7 12.Bd5 Re8–/+) 11...Bb7+= 12.f3 Nbd7 (12...Nc6 13.Nge2–/+) 13.Nge2+= Nb6 14.0–0 Bd6 (14...Re8 15.Re1+=) 15.Ne4 Nfd5 (15...Re8 16.Nd6 Qd6 17.Ng3=) 16.Qd2 (16.Nd6 Qd6 17.Qc2 h6+=) 16...f5 (16...Re8 17.Nd6 Qd6 18.Rfe1=) 17.Nd6 cd6 (17...Qd6 18.Qc2 Ne3 19.Qc5 Nf1 20.Rf1–+) 18.Ng3 (18.Rac1 Rc8+=) 18...Bc8 (18...f4 19.Ne4=) 19.Rfe1 Bd7 (19...Nc4 20.Bc4 bc4 21.Rac1+=) 20.Re2 (20.Rac1 Rc8+=) 20...Rc8 21.Rc1 (21.Rae1 Nc4 22.Bc4 bc4=) 21...Qh4 (21...Nc4 22.Bc4 bc4 23.Bc3=) 22.Rc8 Bc8 23.Re1 (23.Qc2 Qg5+=) 23...Bd7 (23...Nc4 24.Bc4 bc4 25.Qc2+=) 24.Bf1 (24.Qc2 Rc8 25.Qb1 Nc3 26.Bc3 Rc3 27.Nf5 Qf6+=) 24...Rf6 (24...Nc4 25.Bc4 bc4 26.Bc3=) 25.Nh1 (25.Bd3 Nc4 26.Bc4 bc4=) 25...Re6+= 26.Re6 (26.g3 Qh5 27.Re6 Be6+=) 26...Be6 27.Bc1 Kf7 (27...Nc4 28.Bc4 bc4 29.Ng3+=) 28.Ng3= Qd8 (28...Kg8 29.Nh1=) 29.Bd3 (29.Qd3=) 29...Ne7 (29...Qf6 30.Qf2=) 30.Qc2 f5 seems the pivot of the position (30.Qg5 Qd7+/–) 30...Qc8 31.Qc8 Bc8 (31...Nbc8 32.Kf2+=) 32.Kf2 (32.Bf4 Ke6+=) 32...h6 (32...Nbd5 33.Bg5=) 33.Ne2 (33.Bf4 Ke6 34.Ke2 Nbd5=) 33...g5 (33...Nc4 34.Bf4+=) 34.h4 (34.f4 Kf6=) 34...Kf6 35.hg5 hg5 36.Nc3 (36.f4 g4+=) 36...Ned5 (36...Be6 37.g4+=) 37.Nd5 Nd5 38.Bd2 (38.g3 Be6=) 38...Nb6 39.g3 (39.f4 g4+=) 39...d5 (39...Nc4 40.Bc1+=) 40.f4 (40.Ke1 Nc4=) 40...g4+= 41.Ke2 ½–½. Deutu,A – Gomez Gordo,Juan Carlos, Intercajas tt, 1996.

5.d4 e4 =.

5.Nf3 Nc6 6.a3 (6.d4 e4 7.d5 Bf6= (worse is 7...Nb4 8.Bg7 Bf6 9.Bh8 Bh8 10.Nd4+/–)) 6...Nh6 (6...Nf6 7.d4 e4 8.d5=) 7.c5 (7.Be2 0–0=) 7...0–0+= 8.Qc2 e4 (8...Bf5 9.e4 Bg4 10.cd6 Qd6 11.Qc3+=) 9.Qe4 (better is 9.cd6 Bd6 10.Qe4=) 9...f5 (better is 9...dc5!? 10.bc5 Bc5=) 10.Qc4 Kh8 (10...Nf7 11.Be2+/–) 11.Qc3 (11.Be2 dc5 12.bc5 Re8+/–) 11...Bf6+= 12.Qc2 (12.d4 f4+=) 12...Qe7 (12...dc5 13.bc5 f4 14.Nc3+=) 13.d4 (13.cd6 cd6 14.Bf6 Rf6+/–) 13...Bd7 (13...f4 14.d5 Ne5 15.Ne5 Be5 16.cd6 cd6 17.Be5 Qe5 18.Qc3 fe3 19.fe3 Qd5 20.Nd2+=) 14.Bd3+/– Rae8 (14...f4 15.d5 (15.Bh7 fe3 16.cd6 ef2 17.Kf2 Bd4 18.Bd4 Rf3 19.gf3 Qh4 20.Kg1 Qd4 21.Kg2 Qa1–+) 15...Ne5 16.Ne5 Be5 A) 17.Bh7 Bb2 18.cd6 cd6 (18...Qd6?! 19.Qb2 Kh7 20.e4–+) 19.Qb2 fe3–+; B) 17.e4+=) 15.0–0 Nd8 (15...Be6 16.Nc3+/–) 16.Re1 Qf7 (16...Bc6 17.Nbd2+/– (17.Bf5 Nf5 18.Qf5 Bf3 19.gf3 Bd4–/+)) 17.Nc3 (17.cd6 cd6 18.Qc7 Qe7+–) 17...Bc6+/– 18.e4 White plans d5 18...g6 (18...dc5 19.bc5 fe4 20.Ne4+–) 19.d5 fe4? (better is 19...Bd7+–) 20.Ne4 (20.dc6?! ed3 21.Qd2 Nf5 22.cb7 Nb7 23.Qd3 dc5 24.Qa6 cb4 25.ab4 Nbd6+/–; 20.Be4?! Bd7+–; 20.Re4?! Bd7+–) 20...Bd5 (20...Re4 21.Be4 Bd7+–) 21.Nf6 Re1 22.Re1 Nf5 (22...Qf6 23.Bf6 Rf6 24.Re8 Kg7 25.Rd8+–) 23.Nd5 Kg8 24.Nf6 (24.Bf5 Qd5 25.Qc3 Qe5 26.Re5 Nf7+–) 24...Kg7 25.Ng4 1–0. Dopper,Johan – Verduyn De Boer,J, 1992.

5.Nf3 Bf6 6.d3 e4 7.Bf6 Qf6 8.Nd4 c5 (8...Nc6 9.de4 Nb4 10.a3=) 9.bc5 dc5 10.Nb3 Bf5 (10...ed3 11.Bd3 Ne7 12.N1d2+=) 11.de4 Be4 12.N1d2 Bc6 13.Nc5 Ne7 (better is 13...b6 14.Nce4 Qg6+/–) 14.Nf3?? (better is 14.Nde4!? Qb2 15.Rb1 Qa2 16.Nd6 Kf8 17.Ndb7+–) 14...0–0?? (better is 14...Bf3 15.Qd4 Bc6 16.Qf6 gf6–/+) 15.Be2 (15.Qd4 Qh6+/–) 15...Bf3 16.Bf3 (16.gf3!? Qc6 17.Ne4+=) 16...Qc3= 17.Kf1 (17.Ke2 Qc4 18.Nd3 Qc7=) 17...Qc4+= 18.Nd3 Rd8 19.Be2 b5 (19...Nbc6 20.Qb3 b5 21.Qc4 bc4 22.Nc5+=) 20.g3 (better is 20.Nc5! Qd5 21.Qd5 Nd5 22.Nb7=) 20...Nbc6–/+ 21.Kg2 (better is 21.Qb1–/+) 21...Nb4?? (21...Qe4 22.f3 Qe3 23.Re1–+) 22.Rc1 (better is 22.Nb4 Qb4 23.Qb3=) 22...Qd5–/+ (22...Nd3 23.Rc4 bc4 24.Qa4+–) 23.Bf3 Qd3 24.Qd3? (better is 24.Ba8 Ra8 25.Qb3 Qb3 26.ab3–/+) 24...Nd3–+ (worse is 24...Rd3 25.Ba8 Na2 26.Rcd1 Rd1 27.Rd1+–) 25.Rc7 (25.Ba8 Nc1 (25...Ra8?! 26.Rc7 Kf8 27.Rd1–/+) 26.Rc1 Ra8–+) 25...Nd5 26.Rb7 Ne5 27.Be4 (27.g4 Nc3 28.a3 a5–+) 27...Nf6 28.Bf5 Rab8 (28...Rd2 29.a4 g6 30.Bh3–+) 29.Ra7 (29.Rd1 g6 30.Rb8 Rb8–+) 29...g6 (29...Rd2 30.Ra6 Nfg4 31.Bg4 Ng4 32.Rb1–+) 30.Bc2 (30.Ra6 Kg7 (30...gf5?! 31.Rf6 Rd2 32.Rf5–+) 31.Bh3 Rd2–+) 30...Rb6 (better is 30...Rd2 31.Bd1–+) 31.Bb3 Rd7 (31...Nfg4 32.Rd1 Rd1 33.Bd1–+) 32.Ra8 (32.Rd7 Ned7 33.Rd1 Ne5–+) 32...Kg7 33.Rc1 (33.Rd1 Rd1 34.Bd1 Rd6–+) 33...Nc6 (better is 33...Nfg4!? 34.Rc2 Nd3 35.Re2–+) 34.Rc8 Na5 0–1. GuestBFQC – GuestFQBK, freechess.org, 2017.

5.Nf3= Bf6 6.d4 Nc6=.

5.Nf3 Bf6 6.d4!? ed4 7.ed4 (7.Nd4? c5–+) 7...Qe7 8.Be2+=.

5.Nf3 Bf6 6.Be2 e4+= 7.Bf6 Qf6 (worse is 7...gf6 8.Nd4+=) 8.Nd4 c5 (8...Nc6!?–/+) 9.bc5= dc5 10.Nb3 (10.Nc2 Qg6 11.0–0 Nf6=) 10...b6 (10...Qg6 11.g3=) 11.Nc3 Be6 (better is 11...Bb7!?=) 12.Ne4+/– Qg6 (12...Qe7 13.Bf3 Ra7 14.d4+/–) 13.Bf3 (better is 13.Nd6 Ke7 14.Bh5+–) 13...Nf6?? (better is 13...Bc4 14.d4 Bd5 15.Nd6 Qd6 16.dc5 bc5 17.Bd5 Ra7 18.Bf7 Ke7 19.Qd6 Kd6 20.Rd1 Ke7 21.Bg8 Rg8 22.Nc5 Rc7+–) 14.Nd6 (better is 14.Nf6 Qf6 15.Ba8 Bc4+–) 14...Ke7 15.Ba8 Kd6 16.Qf3 (16.d4!? Ke7+–) 16...Nbd7 17.d4 (17.Qf4 Ke7 18.Bf3 Qc2+–) 17...Bc4 18.dc5 (better is 18.Rc1 Bb3 19.ab3 cd4 20.ed4 Re8 21.Kd1+–) 18...Nc5?? (18...bc5 19.Qf4 Ke7 20.Qc4 Ra8 21.0–0+– (21.Nc5 Qg2 22.Ke2 Rc8–/+)) 19.Rd1 (19.Qc6 Ke7 20.Nc5 Qf5 21.Qc7 Nd7+–) 19...Ke7?? (better is 19...Nd3 20.Kf1 Ke7+/–) 20.Nc5+– bc5 (20...Re8 21.Na4 b5 22.Nb6+–) 21.Qb7 Ke6 (21...Nd7 22.Rd7 Kf6 23.Rd6 Be6+–) 22.Qc6 Ke7 23.Qd6 1–0. GuestYCPF – GuestMDTT, freechess.org, 2016.

5.Nf3= Bf6 6.e4 Nc6+= 7.d4 (7.a3 Bg4=) 7...Bg4 (7...Nb4 8.de5 de5 9.Ne5–/+) 8.Be2 (8.d5!? Nd4 9.Bd4 ed4 10.Bd3=) 8...Bf3–/+ 9.de5?? (9.Bf3 Nd4 10.Bd4 ed4 11.e5=) 9...Be2–+ (9...Bg2?! 10.Rg1 Be4 11.ef6 Nf6 12.Rg7 Nb4 13.Na3–+) 10.ef6 (10.Qe2 Be5 11.Be5 de5 12.a3–+) 10...Nf6 (10...Bd1 11.fg7 Nb4 12.gh8Q Nd3 13.Kd2 Nb2 14.Qg8 Ke7 15.Qg5 Kf8 16.Qh6 Ke7 17.Rd1 Nd1 18.Kd1 Qh8 19.Qg5 Ke6 20.Qd5 Ke7+–) 11.Qe2–/+ 0–0 (11...Nb4!? 12.0–0 0–0–/+) 12.a3 Re8 13.Nc3 Nd4 (13...Qe7 14.f3+=) 14.Qd3= Nf5 (14...Nb3 15.Rd1 a5 16.0–0+/–) 15.0–0–0 (better is 15.0–0 Ne7 16.Rfd1+=) 15...Ng4? (15...Ne7 16.c5=) 16.ef5+= Nf2 17.Qg3 Nh1 18.Rh1 f6 19.Nd5 Kf7 (19...Kh8 20.Re1 Re1 21.Qe1+=) 20.Qh3 (20.Re1 Re1 21.Qe1+/–) 20...Rh8? (better is 20...Kg8!?+=) 21.Qh5 g6 (better is 21...Kg8!?+/–) 22.Qh4+– Rg8? (22...a5+–) 23.Qh7 (worse is 23.Bf6 Rh8 24.Bd8 Kg8+–) 23...Rg7 (23...Kf8 24.Bf6 Qf6 25.Nf6+–) 24.fg6 Kf8 25.Qh8 Rg8 26.g7 Kf7 27.Qh6 Rg7 (27...a5 28.Qh5 Ke6 29.Re1 Kd7 30.Qf7 Kc6 31.Bf6 Qb8 32.Ne7 Kb6 33.Bd4 c5 34.bc5 Ka6 35.Qg8 Qg8 36.Ng8 Rg8 37.cd6 Rd8 38.Kd2 b5 39.c5 b4 40.ab4 ab4 41.c6 Kb5 42.c7 Ra8 43.d7 Ra2 44.Kc1 Ra8 45.d8Q Ra1 46.Ba1 Ka4 47.Qa8 Kb5 48.Re5 Kb6 49.Qb8 Kc6 50.c8Q) 28.Rf1 (28.Bf6 Qg8 29.Bg7 Qg7 30.Rf1 Kg8 31.Nf6 Kf8 32.Nh5 Ke7 33.Qg7 Ke6 34.Qf7 Ke5 35.Qd5) 28...Rg6 29.Qh7 (worse is 29.Bf6 Rh6 30.Bd8 Kg7 31.Bc7 Re8+–) 29...Rg7 30.Qf5 (30.Qg7! Kg7 31.Bf6 Qf6 32.Nf6 Rf8 33.Nh5 Kg8 34.Rf8 Kf8+–) 30...Rg6 (30...Rg2 31.Bf6 Rc2 32.Qc2+–) 31.Nf6 Rf6 (31...Qc8 32.Nd7 Ke7 33.Qg6 Kd7 34.Qf5 Kc6 35.Qd5 Kb6 36.Bd4 c5 37.Qd6 Ka7 38.Bc5 Qc5 39.Qc5 b6 40.Qc7) 32.Bf6 Qg8 (32...Qc8 33.Qh7 Kf8 34.Qg7 Ke8 35.Qe7) 33.Bh4 (33.Bh8 Ke8 34.Re1 Qe6 35.Qe6 Kf8 36.Rf1) 33...Kg7 34.Rf4 (34.Qd7 Kh6 35.Rf6 Qg6 36.Qc7+–) 34...Rf8 (34...Kh6+–) 35.Rg4 (35.Qg5 Kh7 36.Qh5 Kg7 37.Rg4) 35...Kh6+– 36.Rg8 (36.Bg5 Kg7 37.Be3 Kh8 38.Bd4 Qg7 39.Bg7 Kg8 40.Bd4) 36...Rf5 37.g4 Kh7 (37...Rf3 38.Kb2+–) 38.gf5 Kg8 39.Be7 (39.Bd8 c6+–) 39...Kf7 40.f6 (40.Bd8 c6+–) 40...c6 (40...b5 41.cb5 ab5 42.Kd2+–) 41.h4 b5 42.h5 (42.cb5 cb5 43.Kd2 d5+–) 42...bc4 43.h6 Kg6 44.h7! Kh7 A deflection 45.f7 d5 46.f8Q Kg6 47.Qe8 (47.Qf6 Kh7 48.Bf8 d4 49.Qg7) 47...Kf5 48.Qc6 Ke4 49.Qa6 (better is 49.Qe6 Kd3+–) 49...Kd4 50.b5 (50.Qf6 Ke4+–) 50...Kc3 51.Bf6 d4 52.b6 Kd3 53.b7 1–0. Jonge – Dopper,Johan, 1995.

5.Nf3 Nf6 6.d4 +=.

5.Nf3 Bg4 6.d4 =.

4.c4 b6

5.Nc3 Bb7 6.d4 ed4 7.Qd4 (7.ed4 d5 (7...Nf6 8.d5 0–0 9.Nf3 c6 10.Be2 cd5 11.cd5=) 8.cd5 Nf6 9.Bb5 Kf8 10.a3 a5 11.ba5=; 7.Nd5 Nf6 (7...c5 8.bc5 dc5 9.ed4 Nf6 10.dc5 Bd5 11.cd5=) 8.Qd4 Nbd7 9.Rd1 c5 10.Qf4 cb4 11.Nf3=) 7...Nf6 (7...Nc6 8.Qd2 Nf6 9.b5 Ne5 10.f4 Ned7 11.Nf3=; 7...Bf6 8.Qd2 Nd7 9.Rd1 a5 10.b5 Ne7 11.Nf3=) 8.b5 (8.Nd5 Nbd7 9.Rd1 c5 10.Qf4 cb4 11.Nf3=) 8...0–0 (8...a6 9.Nf3 Nbd7 10.Be2 Nc5 11.0–0=) 9.a4 (9.Nf3 A) 9...Bf3 10.gf3 a6= (10...c6 11.Rg1=) 11.Rg1=; B) 9...Nbd7 10.Be2 a6 11.0–0=) 9...c5 (9...Nbd7 10.a5 ba5 11.Nd5+=) 10.Qd2 (10.Qf4 Qd7 11.Qg3=) 10...Nbd7 11.f3 (11.Nf3=) 11...Qc7 12.Bd3 Ne5 13.e4 Rae8 14.Nd5 (14.Nge2 Nfd7 15.Nd5 Bd5 16.cd5 Bg5+=) 14...Bd5 (14...Nd5!? 15.Be5 Nb4–/+ (15...de5?! 16.cd5 Qd6 17.a5=)) 15.cd5= c4 (15...Nfd7 16.Ne2=) 16.Bc2 (16.Be5 de5 17.Rc1 Qd6 18.Rc4 Rc8+=) 16...Rc8 (16...Nfd7 17.f4 Ng4 18.Ne2=) 17.Ne2+= Nh5 (17...Nfd7 18.0–0+=) 18.0–0 c3 (18...Bf6!? 19.Bc3 Ng6+=) 19.Bc3+/– Qc5 20.Kh1 Bf6 (20...Nc4!? 21.Qd4 Bf6 22.Qc5 Rc5 23.Bf6 Nf6+/–) 21.Bb3+– Qc7 22.g4 (better is 22.Rac1 Qe7 23.Qc2+–) 22...Nf4?? (better is 22...Ng4 23.Rac1 Qe7+=) 23.Qf4+– (23.Nf4?! Qc3 24.Qc3 Rc3+=) 23...Nd3 24.Qd2 (better is 24.Qe3 Bc3 25.Rab1 Nc5 26.Nc3 Qe7+–) 24...Bc3 25.Nc3?? (better is 25.Qd3 Ba1 26.Ra1+–) 25...Qc3+/– Black gets strong initiative 26.Rfd1 Qb3 27.Qd3+= Rc3 28.Qb1 Rf3 29.Qb3 Rb3 30.Rdc1 Rb4 31.Rc6 Rd8 32.e5?? de5–/+ 33.Rac1 g6 34.Rd1? Ra4 35.d6 Rd7?? 36.Rc7= Rc7?? 37.dc7+– Rc4 38.Rd8 Kg7 39.c8Q Rc8 40.Rc8 Kf6 41.Rc7 e4 42.Ra7 Ke5 43.Ra6 e3 44.Kg1 Ke4 45.Kf1 Kf3 46.Ke1 f5 47.Rb6 f4 48.Rf6 Kg4 49.Ke2 Kh3 1–0. Wagener,Claude – Houss, Luxembourg–chT, 1992.

5.Nc3 Bb7 6.d4 Nd7 7.d5 Ngf6 (7...a5 8.b5 Ngf6 9.Bd3 Nc5 10.Nge2 a4 11.a3=) 8.Nf3 a5 9.b5 Nc5 10.Be2 0–0 11.Qc2 =.

5.Nc3 Bb7 6.d4 Nf6 7.de5 de5 8.Qd8 Bd8 9.Rd1 c6 10.Nf3 Nbd7 11.a3 =.

5.Nc3 Bb7 6.Nf3 Nf6 A) 7.d4 0–0 (7...ed4) 8.d5 c6 9.Be2 cd5 10.Nd5 Nd5 11.cd5=; B) 7.d3 Nbd7 (7...0–0 8.Be2 Nbd7 9.a3 Re8 10.0–0 c5 11.Qd2=) 8.Be2 d5 9.cd5 Bb4 10.0–0 0–0 11.a3=; C) 7.Be2 e4 (7...0–0 8.0–0 a5 9.b5 c5 10.bc6 Nc6 11.d4+=) 8.Nd4 0–0 9.Nf5 d5 10.Qb3 dc4 11.Bc4=.

5.d4 ed4 6.Nf3 Nf6 7.Nd4 0–0 8.Be2 d5 =.

5.Be2 Nf6 6.Nc3 0–0 7.Nf3 e4 8.Ng5 Bb7 =.

5.Nf3 c5 6.bc5 (6.Ne5!? de5 7.Qf3+/– Nc6 8.Qc6 Bd7+/–) 6...bc5= 7.Nc3 a6 (7...Nc6 8.Rb1= Rb8=) 8.Be2 (8.d4 ed4+=) 8...Nf6 (8...Nc6=) 9.0–0 Bd7 10.d4 0–0? (better is 10...Nc6!?+=) 11.de5+/– de5 12.Ne5 Nc6 13.Nd7 Qd7 14.Bf3 Qc7 15.Nd5 Nd5 16.cd5 Rad8 17.e4 (17.Qc2 Ne5 18.Be4 g6+/–) 17...Ne5 (17...Bd6!? 18.Kh1 Be5+/–) 18.Be2+– (18.Be2 c4 19.Qa4+–) 1–0. inspector (2330) – tata (2000), net–chess.com, 2008.

5.Nf3 Nd7 6.Be2 Ngf6 7.Nc3 Bb7 8.0–0 c5 9.bc5 bc5 10.Rb1 0–0 11.d3 Re8 12.Nd2 Bf8 13.Bf3 Bf3 14.Qf3 (worse is 14.gf3 Nb6=) 14...g6 (14...Rb8 15.Qf5+=) 15.Ba1 Bg7 (15...Rb8 16.Rb8 Nb8 17.Rb1+/–) 16.Rb7+/– Nb6 (16...a6 17.Nde4 Ne4 18.Ne4+=) 17.Rb1 Nfd7 (17...Re6 18.Nde4 Nfd7 19.Nb5+/–) 18.Nb5+– Qf6 19.Qf6 Nf6 (19...Bf6 20.Ne4+–) 20.Nd6 Red8 21.Be5 Rd7? (better is 21...Bf8+–) 22.Rd7 Nbd7 23.Bg3 Rb8 (23...Nh5 24.Bh4 Bf8 25.N6e4+–) 24.Rb8 Nb8 25.Nf7! Nbd7 (25...Kf7 26.Bb8 Discovered attack) 26.Nd8 a5 27.Ne6 Bh6 (27...Kf7 28.Ng7 Kg7 29.a4+–) 28.Nb3 a4 (28...Kf7 29.Nd8 Ke8 30.Nb7+–) 29.Nbc5 a3 (29...Kf7 30.Bd6+–) 30.Nd7 Nd7 31.d4 White prepares c5 (31.Bd6 Kf7 32.Nc7 Bf8 33.Bf8 Kf8+–) 31...Nb6 (31...Kf7 32.Nc7+–) 32.c5 Na4 33.c6 Nc3 (33...Kf7 34.d5 Nb6+–) 34.c7 (34.c7 Ne2 35.Kf1 Ng3 36.fg3+–) 1–0. pereira – jondoe9999, internet, 2007.

5.Nf3 Bf6 6.Nc3 Bb7 A) 7.Nd5 e4 (7...Nd7 8.d4 ed4 9.Nd4 Ne7 10.Nf6 Nf6 11.Bd3 Ng6 12.0–0 Ne5) 8.Nd4 c5 9.Nf6 Nf6 10.Qa4 Kf8 11.Nc2 cb4 12.Nb4 Nbd7; B) 7.Qc2 e4 (7...Na6 8.a3 e4 9.Nd4 Bd4 10.ed4 Nf6 11.c5 0–0 12.c6 Bc8) 8.Nd4 Bd4 9.ed4 Nf6 10.b5 0–0 11.Be2 Nbd7 12.0–0 a6; C) 7.Be2 Ne7 (7...Nd7 8.Qc2 Ne7 9.0–0 0–0 10.Bd3 g6 11.Be4 c6 12.b5 Rb8; 7...a5 8.b5 Nd7 9.0–0 Ne7 10.Qc2 g6 11.Bd3 Nc5 12.Ne4 Be4) 8.Qc2 Na6 9.Nd5 Nd5 10.cd5 0–0 11.a3 Qd7 12.d4 b5; D) 7.Qb3 e4 (7...Ne7 8.Bd3 a5 9.b5 Nd7 10.Ne4 Nc5 11.Nc5 bc5 12.e4 Qd7; 7...Nd7 8.Nd5 Ne7 9.Nf6 Nf6 10.Be2 0–0 11.0–0 a5 12.b5 Ne4; 7...a5 8.ba5 Ra5 9.Nd5 Nd7 10.Bc3 Ra8 11.d4 ed4 12.Nd4 Ne7) 8.Nd4 Nd7 9.Be2 Bd4 10.ed4 Qg5 11.0–0 Ngf6 12.Nb5 0–0–0.

5.Nf3 Bf6 6.d4 ed4 7.Bd4 (7.ed4 Ne7 8.b5 a6 9.Bd3 d5 10.Na3 dc4 11.Nc4 ab5 12.Nce5 Nbc6) 7...Nc6 (7...c5 8.Bf6 Nf6 9.bc5 dc5 10.Qd8 Kd8 11.Nc3 Ke7 12.Nd5 Nd5; 7...Bd4 8.Nd4 Bb7 9.Nc3 Nf6 10.Bd3 a5 11.b5 Nbd7 12.0–0 0–0) 8.Be2 (8.Nc3 Nd4 9.ed4 Bg4 10.Be2 Nh6 11.h3 Be6 12.0–0 0–0) 8...Bd7 (8...Nb4? 9.Qa4 Qd7 10.Qb4+–; 8...Nd4?! 9.ed4 (worse is 9.Nd4 c5–/+ 10.Bf3 Bd7 11.Ba8 Qa8 12.0–0 cd4) 9...Ne7 (9...Nh6 10.Nc3 Nf5 11.0–0 c5 12.Nd5 0–0) 10.Nc3= 0–0 11.0–0 c5 12.Ne4 Nf5) 9.b5 Nd4 10.ed4 (10.Nd4 Ne7 11.Bf3 Rc8 12.Nc3 0–0) 10...a6 (10...Ne7 11.Nc3 0–0 12.0–0 a6) 11.0–0 (11.Nc3 Nh6 12.Qd2 ab5) 11...Ne7 (11...ab5 12.cb5 Nh6) 12.Nc3 (12.Nbd2 ab5) 12...0–0 13.a4 ab5 14.ab5 Ra1 15.Qa1 c5 16.Ne4 Nf5 (16...Ng6!?=) 17.Nf6+/– Qf6 18.dc5 Qa1 19.Ra1 dc5 20.Kf1 (20.g4 Nh6 21.g5 Nf5+/–) 20...Be6 21.Ke1 (21.Ra6 Rb8+=) 21...Nd6 22.Nd2 Re8 23.Kd1 g6 24.Ra6 Rb8 25.Kc2 f5 26.Kc3 (26.Ra7 Re8+=) 26...Kf7 (26...Bc8 27.Ra2=) 27.Bf3 Kf6 28.g3 Bc8 29.Ra7 h6 30.Bc6 Be6 31.Bf3 Nf7 32.Nf1 (32.Bg2 Ne5=) 32...Ne5 (better is 32...Bc4!? 33.Kc4 Ne5 34.Kb3 Nf3–/+) 33.Be2 Rd8 (33...g5 34.Ne3=) 34.Rb7 Rd6 35.h4 (35.f4 Ng4=) 35...g5 36.hg5 hg5 ½–½. Buettner,Ulrich – Zickau,Norbert, ch–Solingen, Solingen GER, 2003.

5.Nf3 Bf6 6.d4 e4 A) 7.Nd4 Bd4 (7...c5 8.Qa4 Kf8 9.Nc2 Ne7 10.Be2 Nbc6 11.0–0 a5 12.bc5 bc5) 8.ed4 Nf6 9.b5 0–0 10.Be2 Nbd7 11.0–0 Bb7 12.Qb3 Qe7; B) 7.Qb1 Bb7 8.Nd4 Bd4 9.ed4 Nf6 10.Be2 0–0 11.d5 Re8 12.0–0 c6; C) 7.Qc2 Bb7 8.Nd4 Bd4 9.ed4 Nf6 10.d5 Qe7 11.0–0–0 0–0 12.Re1 Re8.

5.Nf3 Nf6 6.Nc3 (6.Bd3= e4 7.Bf6 Bf6 8.Be4 d5+=) 6...0–0 7.d4 c6 8.e4 d5 =.

5.Nf3 Bb7

6.b5 Nf6 7.d4 ed4 8.Nd4 0–0 9.Nd2 c5 10.Nf5 d5 11.Qf3 Qc7?? (better is 11...Nbd7+=) 12.Qg3+– (12.Ne7?! Qe7 13.Bf6 Qf6 14.Qf6 gf6 15.cd5 Bd5+/–) 12...Qg3 13.Ne7 (13.Ng3?! g6=; 13.hg3?! Re8 14.Ne7 Re7 15.Bf6 gf6+/–) 13...Kh8 14.hg3 (14.fg3?! d4+–) 14...Re8 (14...d4 15.Nf5 (15.ed4?! Re8 16.0–0–0 Re7 17.dc5 bc5+–) 15...de3 16.fe3+–) 15.Nf5 (better is 15.Bf6!? gf6 16.Nd5 Bd5 17.cd5 a6+–) 15...Nbd7 16.Nd6 Reb8 17.Nf7 Kg8 18.Nd6 a6 19.Nb7 Rb7 20.cd5 Nd5 (20...ab5 21.Bb5 Rd8 22.e4+–) 21.ba6 (21.Bc4!? Rba7 22.Bd5 Kh8 23.Ba8 Ra8+–) 21...Rc7 22.Bc4 (22.Bc4 Kh8 23.Bd5 Ra6 24.Rh6+–) 1–0. Nikishin,Sergey (2110) – Tamarovskiy,Andrey (1860), Kislovodsk RUS, Narzan Open, 2012.

6.d4 f6 7.Nbd2 Nh6 8.Bd3 0–0 9.b5 (9.Qb3+/–) 9...d5 (better is 9...Nd7!?+=) 10.de5+– fe5 11.cd5 Bd5 12.Qc2 g6? (better is 12...Nd7+–) 13.Bg6! (13.Be5?! Qe8+–) 13...Bf3 (13...hg6 14.Qg6) 14.Bh7 (< 14.gf3 Kh8 15.Bh7 Bf6+–) 14...Kg7 (14...Kh8 15.Nf3 Nd7+–) 15.Qg6 (15...Kh8 16.Qh6+–) 1–0. Trkn – guest5614, ICC, 2004.

6.Be2 Nf6 7.d3 Nc6 8.a3 0–0 9.Nbd2 h6 10.0–0 d5 (10...a6!?+=) 11.Ne5 Ne5 12.Be5 dc4 13.dc4 c5 14.b5 Nd7 15.Bb2 Bf6 16.Qc2 Bb2 17.Qb2 Qg5 18.Bf3 Bf3 19.Nf3 Qf6 20.Qf6 Nf6 21.Rfd1 Rad8 22.Kf1 Ne4 23.Ke1 Nc3 24.Rd8 Rd8 25.Rc1 Ne4 26.Rc2 (26.Ne5 f6 27.Nc6 Rd3 28.Na7 Nd6+/–) 26...f6 (better is 26...Rd3!?+=) 27.Nd2+/– Nd2 28.Rd2 Rd2 29.Kd2 Kf7 30.Kd3 Ke6 31.Ke4 f5 32.Kd3 Ke5 33.f4 Ke6 34.h3 g5 35.fg5 hg5 36.g4 fg4 37.hg4 Ke5 38.a4 Kf6 39.e4 Ke6 40.Ke2 Ke5 41.Ke3 Kf6 42.Kd3 Ke5 43.Ke3 Ke6 44.Kd3 Ke5 45.Ke3 ½–½. Fournier,Frederic – donono4, Active, 2008.

6.g3 Nf6+= 7.Bg2 Nc6 (7...e4 8.Nd4+=) 8.0–0 0–0 (8...Nb4 9.Qa4 Nc6 10.Ne5 de5 11.Bc6 Bc6 12.Qc6 Nd7 13.Be5 0–0+=) 9.a3 h6 (9...e4 10.Ng5 a5 11.b5+=) 10.d4 ed4 (10...e4 11.Nfd2 d5 12.cd5 Qd5 13.Nc3+/–) 11.Nd4+= Qd7 12.Nc6 (12.Nc3 Rfe8+=) 12...Bc6= 13.Bc6 (13.Nc3 Bg2 14.Kg2 c6=) 13...Qc6 14.Qd3 d5 (14...a6 15.Nc3+=) 15.cd5 Qd5 16.Qd5 Nd5 17.Nc3 (17.b5 a6 18.e4 Bf6=) 17...Nc3 18.Bc3 Rfd8 (18...c5 19.Rfd1=) 19.Rfd1 Rd1 (19...c5 20.e4=) 20.Rd1+= Rd8 (20...Bd6 21.a4+=) 21.Rd8 Bd8 22.Be5 (22.b5!?+=) 22...f6 23.Bd4 (23.Bc3 c5=) 23...Be7 24.Kg2 (24.e4 c5 25.Bc3 c4=) 24...Kf7 25.Kf3 Ke6 26.Ke4 g6 27.f4 (27.Bc3 f5 28.Kd3 c5+=) 27...c5 28.Bc3 cb4 (28...f5 29.Kf3+=) 29.Bb4 (29.ab4 f5 30.Kd3 Kd5=) 29...Bb4 30.ab4 a6 31.Kd4 a5 (31...f5 32.g4=) 32.Kc4 (32.ba5 ba5 33.Kc4 Kf5=) 32...a4 (32...ab4 33.Kb4 Kd6+=) 33.e4 (33.b5!? Kf5 34.Kb4=) 33...b5–/+ 34.Kc3 (34.Kd4 g5–/+) 34...g5 35.Kb2 (35.h4 g4–/+) 35...gf4 (35...Kd6!?–+) 36.gf4–/+ Kf7 37.Ka2 (37.Kc3 Ke7–/+) 37...Kg6 (37...h5!? 38.Kb2–/+) 38.Kb2–/+ Kh5 39.Ka2?? (better is 39.h3–/+) 39...Kg4–+ 40.e5 fe5 41.fe5 Kf5 42.e6 Ke6 43.Kb2 Kd5 44.Kc2 Kc4 45.h3 a3 46.Kb1 Kb3 47.h4 Kb4 48.Ka1 Kc3 49.Kb1 b4 50.h5 a2 51.Ka2 Kc2 52.Ka1 Kc1 53.Ka2 Kc2 54.Ka1 Kc3 55.Kb1?? Kb3–+ 56.Ka1 Kc2 57.Ka2 b3 58.Ka1 b2 59.Ka2 b1Q 60.Ka3 Qb5 61.Ka2 Qa4 0–1. Slavisa666 – ooo1o, Live Game Caissa's Web, 2004.

6.Nc3 Nf6

7.Be2 Nbd7

8.d3 a5 A) 9.b5 A1) 9...Nc5 10.d4 (10.0–0 0–0 11.d4 ed4 12.ed4 Ne6 13.Re1 Re8 14.d5; 10.h3 0–0 11.d4 ed4 12.ed4 Nce4 13.0–0 Nc3 14.Bc3) 10...ed4 11.ed4 Ne6 12.0–0 0–0 13.Re1 Re8 14.d5; A2) 9...0–0 10.d4 (10.0–0 Nc5 11.d4 ed4 12.ed4 Nce4 13.Bd3 Nc3 14.Bc3) 10...ed4 11.ed4 Ne4 12.Ne4 Be4 13.0–0 d5 14.cd5; B) 9.a3 B1) 9...ab4 10.ab4 Ra1 11.Qa1 0–0 12.0–0 c6 13.d4 Qc7 14.h3; B2) 9...Nf8 10.0–0 (10.h3 Ne6 11.0–0 0–0 12.Qb3 Qd7 13.Nd5 a4 14.Qa2; 10.d4 ed4 11.ed4 Ne6 12.0–0 Nf4 13.d5 Qd7 14.Qd2) 10...Ne6 11.d4 ed4 12.Nd4 0–0 13.Nf5 ab4 14.ab4; B3) 9...d5 10.0–0 ab4 11.ab4 Ra1 12.Qa1 dc4 13.dc4 0–0 14.Qa3; B4) 9...0–0 10.0–0 (10.Qb3 ab4 11.ab4 Ra1 12.Ba1 c6 13.Bb2 Qc7 14.0–0) 10...ab4 11.ab4 Ra1 12.Qa1 c6 13.d4 Qc7 14.h3.

8.d3 0–0

9.0–0 a5 10.a3 (10.b5 Nc5 11.d4 ed4 12.ed4 Nce4 13.Bd3 Nc3 14.Bc3) 10...ab4 11.ab4 Ra1 12.Qa1 c6 13.Qb1 Qc7 14.d4.

9.0–0 c5 10.a3 (10.b5 a6 11.Qb3 ab5 12.Nb5 Bc6 13.a4 Qc8 14.Rfd1) 10...Qc7 11.h3 a6 12.Qb3 Bc6 13.Nd5 Nd5 14.cd5.

9.0–0 c6 10.h3 (10.Qc2 d5 11.cd5 cd5 12.Qb3 Qb8 13.h3 Rc8 14.Rac1; 10.a3 h6 11.Qc2 d5 12.cd5 cd5 13.d4 e4 14.Nh4) 10...h6 11.Qc2 Re8 12.d4 ed4 13.Nd4 c5 14.bc5.

9.0–0 h6 10.a3 (10.Qc2 a6 11.h3 c5 12.bc5 Nc5 13.d4 ed4 14.Nd4; 10.Qb3 Re8 11.Nh4 a5 12.a3 g6 13.Nf3 e4 14.de4) 10...a5 (10...Re8 11.Qc2 a6 12.d4 ed4 13.Nd4 Ne5 14.e4) 11.Qc2 ab4 (11...c5 12.bc5 bc5 13.Rab1 Rb8 14.Nh4) 12.ab4 Ne8 (12...c5 13.Ra8 Ba8 14.b5) 13.Ra8 Ba8 14.Ra1 Nef6 15.Qa4 Bb7 16.Qa7 Qa8 17.Ne1 c5 (17...d5 18.Nd5 Nd5 19.cd5 Bb4 20.Nf3+=) 18.b5 Qa7 (18...d5 19.cd5 Bd5 20.Qc7+/–) 19.Ra7 Ba8 20.Bf3 Bf3 21.Nf3 Rd8 22.Na4 Rb8 23.Nh4 g6 24.f4 ef4 25.ef4 Bd8 26.Nf3 Kf8 27.h3 Ke8 28.Kf2 Ng8 29.g4 Ne7 30.d4 (30.Nc3 Nc8 31.Ra2 Bf6+/–) 30...Nc8 31.Ra6 Rb7 32.dc5 (32.Ke3 Bf6+/–) 32...dc5+= 33.Ke3 Kf8 34.Ra8 Rb8 35.Rb8 Nb8 36.Ke4 Ne7 37.f5 gf5 38.gf5 Nc8 39.Be5 Nd7 40.Nc3 Ne5 41.Ke5 Kg7 (41...Ke8!?+=) 42.Nd5+/– f6?? (better is 42...Kf8+/–) 43.Ke6+– Kf8 44.Nf6 (44.Kd7 Be7 45.Kc8 Kf7 46.Ne7 Ke8 47.Ng6 Kf7 48.Kb7 Ke8 49.Kc7 Kf7 50.Kc6 Ke8 51.Kb6 Kd7 52.Ka7 Kc7 53.b6 Kc6 54.b7 Kd7 55.b8Q h5 56.Kb6 h4 57.Qc7 Ke8 58.Qe7) 44...Bf6 45.Kf6 Nd6 46.Ne5 Kg8 (46...Ne8 47.Kg6 Ke7+–) 47.Ke6 Ne4 48.f6 Ng5 49.Ke7 Nh7 50.Nd7 1–0. Turbomike – XANDERKIRV, playchess.de, 2003.

9.a3 A) 9...e4 10.de4 (10.Nd4 c5 11.Nf5 ed3 12.Bd3 Ne5 13.0–0 g6 14.Ne7) 10...Ne4 11.0–0 Ndf6 12.Bd3 Qd7 13.Qc2 Nc3 14.Bc3; B) 9...a5 10.0–0 (10.Qb3 ab4 11.ab4 Ra1 12.Ba1 c6 13.0–0 Qc7 14.Bb2) 10...ab4 11.ab4 Ra1 12.Qa1 c6 13.d4 Qc7 14.Qb1.

9.Qc2 A) 9...d5 10.b5 (10.cd5 Bb4 11.0–0 Bc3 12.Bc3 Nd5 13.Ne5 Nc3 14.Qc3; 10.0–0 dc4 11.dc4 Bb4 12.Nd5 Bd6 13.Rad1 e4 14.Nd4) 10...a6 11.ba6 Ra6 12.0–0 Ra5 13.Rfd1 g6 14.h3; B) 9...a5 10.b5 Nc5 11.0–0 Qd7 12.d4 ed4 13.Nd4 a4 14.Ba3.

9.h3 A) 9...e4 10.de4 (10.Nd4 ed3 11.Bd3 Ne5 12.Nf5 d5 13.Nd5 Nd3 14.Qd3) 10...a5 11.b5 Nc5 12.Nd2 Nfe4 13.Nde4 Ne4 14.Ne4; B) 9...d5 10.b5 (10.cd5 Bb4 11.e4 c6 12.dc6 Bc6 13.0–0 Qe7 14.Qb3) 10...a6 11.0–0 ab5 12.cb5 Bd6 13.Qc2 Qe7 14.Rfe1; C) 9...a5 10.b5 Nc5 11.0–0 a4 12.d4 a3 13.Bc1 ed4 14.ed4.

4.c4 c6

5.b5 Nf6=+ 6.Nf3 0–0 7.Be2 Nbd7 8.0–0= a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 e4 12.Nd4 Ne5 13.Nb3 Ng6 14.d3= ed3 15.Bd3 Ne5 16.Nc3 Be6 17.bc6 bc6 18.Nd4 Bd7 19.Qc2 ½–½. Hauck,B – Popis,I, Rheinhessen–ch (C1), 1990.

5.Nc3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nc3 c6).

5.Nf3 f5 6.c5 Nf6 7.cd6 Bd6 8.Be5 Be5 9.Ne5 Qd5 (9...Qe7 10.Nf3+=) 10.Nc4 (10.Nf3 Qd6+/–) 10...0–0 11.Nc3 Qe6 12.Na5 Ne4?? (better is 12...Qe7+/–) 13.Bc4+– 1–0. Janek – fixiq, internet, 2017.

5.Nf3 Nf6 6.Be2 Nbd7 7.d3 a6 8.a3 b5 9.Nc3 0–0 10.0–0 Bb7 11.e4 Nb6 12.cb5 ab5 13.Qb3 Bc8 14.a4 Be6 15.Qc2 ba4 16.Na4 Qc7 17.Nb6 Qb6 18.Bc3 h6 19.Nd2 c5 20.bc5 Qc5 21.Ra8 Ra8 22.Rc1 Rc8 23.Bd1 Qa7 24.Qb2 Bd8 25.Nb3 Bb6 26.Be1 Rb8 27.Qa1 (27.Qc2 Kh7 28.Rb1 d5–/+) 27...Qa1 28.Na1 Bd4 29.Nc2? (better is 29.Bf3–/+) 29...Bb6 30.Rb1?? (better is 30.Na1=) 30...Bf2!–+ 31.Kf2 (31.Bf2 Rb1 Discovered attack; 31.Kf2 Ng4 Double attack (31...Rb1 Discovered attack)) 31...Rb1 32.Ke2 (32.Ne3 d5 33.ed5 Nd5 (33...Bd5?! 34.Bc3–+) 34.Nd5 Bd5–+) 32...d5 (better is 32...Bg4!? 33.Kd2 Rd1 34.Ke3–+) 33.ed5 (33.Ne3 d4 34.Nf5 Bf5 35.ef5 Nd5–+) 33...Nd5 (better is 33...Bg4 34.Kf1 Bd1 35.Ne3–+) 34.Na3 (34.Kd2–+) 34...Ra1 (34...Bg4!? 35.Kf2 Rd1 36.Nc4–+) 35.Nc4 Nc3! 36.Bc3 Bc4?? (better is 36...Bg4 37.Ke3 Rd1 38.Ne5 Bf5–+) 37.Ba1+– (37.dc4?! Ra7+/–) 37...Ba6 (37...Bd5 38.Be5 Bg2 39.Bb3+–) 38.Be5 f6 39.Bb3 Kf8 40.Bd6 Ke8 41.Ke3 Kd7 (41...Bb7 42.g3+–) 42.Bf8 Bb7 43.Bg7 Bg2 44.Bf6 h5 (44...Ke8 45.d4+–) 45.Be5 (better is 45.Bf7!? h4 46.Bh4 Bh3+–) 45...h4 46.d4 h3 47.d5 Ke7 48.Kd4 (better is 48.d6 Kd7 49.Ba4 Bc6 50.Bc2+–) 48...Kd7 (48...Bf3 49.d6 Kd7 50.Ba4 Bc6 51.Bc6 Kc6 52.Ke3+–) 49.Kc5 Kd8 50.Kc6 Kc8 51.Kd6 Kd8 52.Bf6 Kc8 53.Ke7 Kc7 54.d6 1–0. Fournier,Frederic (1630) – JUCASA, Active, 2007.

5.Nf3 Nf6 6.Be2 Bg4 7.h3 Bh5 8.d3 0–0 9.Nbd2 Bg6 10.0–0 b6 11.a3 a5 12.e4 ab4 13.ab4 Ra1 14.Qa1 Nbd7 15.Qa7 c5 16.bc5 bc5 17.Ra1 Qb8 18.Qb8 Rb8 19.Bc3 Nh5 20.g3 Nhf6 21.Nh4 Bf8 22.Ng6 hg6 23.Ra7 Kh7 (23...Nb6 24.f4 ef4 25.gf4+/–) 24.Bd1 (better is 24.Bg4 Ng4 25.hg4+– (worse is 25.Rd7 Nh6+/–)) 24...Rb1?? (better is 24...g5+/–) 25.Nb1+– g5 26.Ba4 (26.Rb7 d5 27.cd5 c4 28.dc4 Bd6+–) 26...Nb8 (26...Nb6 27.Bb5 Kg8 28.Rc7+–) 27.Rf7 Kg6 (27...Kg8 28.Ra7 g4 29.hg4+–) 28.Rf8 Nbd7 29.Bd7 Nd7 30.Rd8 Nb6 31.Rd6 (31.Rd6 Kf7 32.Rb6+–) 1–0. Fournier,Frederic (2045) – samuro (1820), Active, 2004.

4.c4 Nc6

5.b5 Na5 6.Qa4 (6.Bc3 b6=) 6...b6 7.Bc3 (7.d4 ed4 8.Bd4 Bf6=) 7...Nb7 (7...a6 8.c5=) 8.Bb4 (8.d4 ed4 9.ed4 Nf6=) 8...Nf6+= 9.Nc3 (9.Be2 a6+=) 9...0–0 10.Nf3 Bg4 11.Bd3 e4 (better is 11...a6!? 12.ba6 Na5+=) 12.Ne4+= Bf3 13.gf3 Nc5 14.Bc5 dc5 15.Ke2 (15.Qc2 a6+=) 15...Nd7 (15...Qd7 16.Qc2 g6 17.Rag1+=) 16.Ng3 Ne5 (16...Nf6!?+=) 17.Be4+/– Bf6 (17...Rc8 18.f4 Nd7 19.Qa7+–) 18.Rag1 g6 (better is 18...Rc8!?+–) 19.f4 (19.Ba8?! Qd3 20.Ke1 Ra8=) 19...Ng4 (19...Nd7 20.Ba8 Qa8 21.h4+–) 20.Ba8 Qa8 21.f3 Nh6 22.h4 Bg7 23.h5 Kh8 (23...c6 24.bc6 Rc8 25.hg6 fg6 26.f5+–) 24.Rg2 (24.Rh2 a6 25.ba6 Ng8+–) 24...Ng8 (24...Kg8 25.Rgh2+–) 25.Ne4 h6 (25...gh5 26.Rhg1 Bf6 27.Rg8 Rg8 28.Rg8 Qg8 29.Nf6 Qg2 30.Kd1+–) 26.hg6 fg6 27.Rg6 Ne7 28.Rg5 (28.Re6 Nf5+–) 28...Kg8 (28...c6 29.Qa3 Qb7 30.bc6 Nc6 31.f5+–) 29.Rh6 1–0. Janek – Viorel, internet, 2017.

5.b5= Nb8 6.d4 ed4 (6...Nd7 7.Nf3 ed4 8.Bd4 Ngf6 9.Bd3=) 7.Bd4 (7.Ne2 c5 8.bc6 Qa5 9.Qd2=) 7...Bf6 (7...Nf6 8.Nf3 Nbd7 9.Be2=) 8.Nf3 b6 (8...Bd4!? 9.Qd4= (9.ed4 a6=)) 9.Bd3+/– Bd4 10.ed4 Qe7 11.Kd2 Kf8 12.Re1 Bb7?? (better is 12...Qd7+/–) 13.Re7+– (13.Re7 Ne7 14.Ng5+–) 1–0. pcmvr (2775) – tata (2000), net–chess.com, 2008.

5.d4 e4 6.b5 Nb8 7.Nc3 f5 8.Qh5 g6 9.Qd1=.

4.c4 Nd7

5.Nc3 Ngf6 6.Nf3 b6 7.e4 Bb7 8.d3 a5 9.b5 Nc5 10.Be2 0–0 11.0–0 Bc8 12.Ne1 Ne6 13.Nc2 Nf4 14.Bf3 Ng6 15.Ne3 Nh4 16.Be2 Ng6 17.Ncd5 Re8 18.a4 Bf8 (18...Nd5 19.Nd5 Bg5 20.Bg4+=) 19.f4 (19.Nf6 Qf6 20.Nd5 Qd8+/–) 19...Nd5+= 20.Nd5 (worse is 20.cd5 Nf4 21.Rc1 Qg5+=) 20...ef4 21.Nf4 Nf4 22.Rf4 g6 (22...Qg5 23.Bc1+=) 23.Qc2 Bg7 24.Bg7 Kg7 25.Qb2 f6 26.Raf1 Rf8 27.h4 Qe7 28.g4 Qe5 29.d4 Qe7 30.Bd3 Bd7 31.Qg2 White prepares g5 31...Be6 (31...c5!?+=) 32.g5+/– fg5 33.hg5 (33.Qg5 Qg5 34.hg5 Rf4 35.Rf4 Rh8+=) 33...Rf4+= 34.Rf4 Rf8 35.Rf8 Kf8 36.Qf2 Kg7 37.Qf4 Qf7 38.Qf7 Kf7 39.Kf2 Ke7 (39...Kg7 40.e5+=) 40.Ke3+/– Bc8 41.Kf4 Bd7 42.e5 c6 (42...de5 43.Ke5 Be6 44.Kf4+=) 43.c5! bc5 (43...bc5 44.dc5 Combination; 43...dc5 44.dc5 Combination) 44.b6 de5 (44...Bc8 45.dc5 dc5 46.Bc4+–) 45.de5 (45.Ke5!? Bc8 46.dc5 Bb7+–) 45...Bc8 46.Bc4 Bb7 47.Ke4 Bc8 (47...Kf8 48.Ke3+–) 48.Bg8 Bf5 49.Ke3 Bc8 50.Bh7 Ke6 51.Bg6 Ke5 52.Be4 Bb7 53.g6 (53.g6 Ke6 54.Kd3 Ba6 55.Kc3+–) 1–0. Krafzik,Joachim (2060) – Zellner,Erwin (1680), Chiemgau Seniors–Cup 1st, 2005.

5.Nc3 Ngf6 6.Nf3 c6 7.Be2 a6 (7...e4 8.Nd4 Ne5 9.0–0 c5 10.bc5 dc5 11.Nb3 Nd3 12.Ba3=) 8.0–0 (8.a3 e4 (8...a5 9.0–0 ab4 10.ab4 Ra1 11.Qa1 d5 12.b5=) 9.Ng5 d5 10.cd5 cd5 11.d3 a5 12.b5=; 8.d4 0–0 9.0–0 Re8 10.e4 Qb6 11.a3 c5 12.bc5=) 8...Nf8 (8...0–0 9.d4 e4 10.Nd2 d5 11.a3 Re8 12.Qb3=) 9.d4 (9.Qc2 Ne6 10.Rfd1 Qb6 11.a3 0–0 12.d4+=) 9...Ng6 (9...e4 10.Nd2 d5 11.cd5 cd5 12.a3+=) 10.Qc2 Bg4 (10...0–0 11.Rfd1 Qc7 12.a3+=) 11.Rfd1 (11.Rad1 Qc7 12.h3+=) 11...Bf3 (11...Qc7 12.h3+=) 12.Bf3 Qc7 13.Ne4 Nh4 14.Nf6 Bf6 15.Be2 Ng6 16.de5 de5 17.c5 0–0 18.Bc4 Rad8 19.Qb3 Rd1 20.Rd1 Rd8 21.Rd8 Bd8 ½–½. Berlacki,Piotr – Mohn,Harald, Wch Seniors Bad Woerishofen, 1991.

5.d4 Ngf6 6.Nd2 ed4 7.ed4 (7.Bd4 c5 8.bc5 dc5=) 7...0–0 8.Bd3 c6 (8...Re8 9.Ne2+=) 9.Ngf3= d5 10.c5 Re8 (10...Nh5 11.Qc2 Ndf6 12.0–0=) 11.0–0 a6 (11...Qc7 12.Re1=) 12.Qc2 (12.Re1 b6+=) 12...Bf8 (12...a5 13.b5=) 13.Rae1 g6 (13...Be7 14.a4+=) 14.a4 Nh5 15.Re8 Qe8 16.Re1 Qd8 17.Nf1 (17.Bc1 Nf4+=) 17...Nf4 18.Ng3 (18.a5 Nd3 19.Qd3 Bg7+=) 18...Nd3= 19.Qd3 Bg7 (19...b6 20.Bc1+=) 20.Qc3 (20.a5 Nf8+=) 20...Nf8 (20...a5 21.b5+=) 21.h3 (21.Bc1 Ne6+=) 21...Be6 (21...a5 22.b5=) 22.Re3 (22.Bc1 a5+=) 22...Bh6 (22...a5 23.b5=) 23.Re2 f6 (23...Qf6 24.Ne5=) 24.Bc1+= Bc1 (24...Bg7 25.Bf4+=) 25.Qc1 Qd7 (25...Qc7 26.Qc2+=) 26.Qf4+/– Kg7 27.Rb2 (27.Re1 a5 28.Qd2 ab4 29.Qb4 Re8+/–) 27...Bf7 (27...Re8 28.Rb3+=) 28.Nh4 (28.Rb3 Re8+/–) 28...Be6 29.Qe3 Re8 30.Re2 Bf7 (30...Qc7 31.Nf3+=) 31.Qd2 Be6 32.Qf4 h6 (32...Rd8 33.Nf1+=) 33.Qc1 (33.Nf3 Qf7+/–) 33...Nh7 (33...Qc7 34.Nf3+=) 34.f4 (34.Qc2 Bf7+/–) 34...f5 35.Nf3 Nf6 36.Ne5 Qd8 37.Re3 (37.Qd2 Ne4 38.Qe3 Qh4 39.Ne4 de4=) 37...Bf7 (37...Ne4 38.Qe1+=) 38.Qd2 (38.Qf1 Ne4+=) 38...Ne4 39.Qe1 Re6 (39...Qf6 40.Ne2+=) 40.Ne2 (40.a5 Kf8+=) 40...Be8 (40...b5 41.Ra3+= (worse is 41.Nf7 Kf7 42.Ra3 Qe7+=)) 41.g4 (41.Kh2 b5+=) 41...a5 (41...fg4 42.hg4 b5 43.ab5 ab5 44.Ng3+=) 42.ba5 (42.gf5 gf5 43.ba5 Kh8+=) 42...Kh7 (42...fg4 43.hg4 Bf7 44.Ng3+/–) 43.Rb3+/– Qc8 (43...Qc7 44.Ng3+/–) 44.Qh4 Qc7 (44...Kg7 45.Ng3 fg4 46.Ng4+/–) 45.g5 h5 (45...Qa5 46.Rb7 (46.Qh6 Kg8 47.Nc3 Qa8+/–; 46.gh6 b5 47.cb6 Qd2–/+) 46...Kg8 47.Rb1–/+) 46.Qe1 Kg7 (46...Bd7 47.Qb4 Bc8 48.Re3+/–) 47.Rb6 Bf7 (better is 47...Bd7!?+/–) 48.Qb4+– Re7 49.a6 (49.Nf7?! Kf7 50.Qb2 h4+/–) 49...ba6 50.Rc6 (50.Nf7?! Kf7 51.Qb2 a5+=) 50...Qa7 51.Qa5 (51.Qa5 Qb8 52.Qa6 (52.Ra6?! Qb3 53.Kg2 Qe3=; 52.Nf7 Qb3 53.Kg2 Qe3–/+) 52...Qb1 53.Kg2=). Machete (2305) – psychessnew (1895), ICC, 2003.

5.Nf3 b6 6.d4 ed4 (6...e4 7.Ng1=) 7.Nd4+= Bb7? (7...Ne5 8.Be2+=) 8.b5?? (better is 8.Ne6! fe6 9.Bg7+–) 8...Bf6= 9.Nd2 Ne7 10.a4 (10.N2f3 0–0=) 10...a6 11.N2f3 (11.ba6 Ba6 12.Ne4 Be5=) 11...ab5 (11...0–0 12.Bd3=) 12.cb5= 0–0 13.Qc2 (13.Be2 Nc5=) 13...Bf3 (13...Nc5 14.Bc4+=) 14.Nf3 Bb2 15.Qb2 Nc5 16.Qc2 Ng6 (16...Ra5 17.Bd3 Nd3 18.Qd3=) 17.Be2 Qf6 18.0–0 Ra5 19.Ra2 (19.Rfd1 Rfa8=) 19...Ne5 (19...Rfa8 20.Rfa1=) 20.Nd4 g6 (20...Rfa8 21.f4 Ng6 22.Bf3=) 21.Rfa1 (21.f4 Ned7+=) 21...Re8 22.Nb3 Ra7 (22...Nb3 23.Qb3 Nd7 24.Rc1=) 23.a5 (23.Nc5 dc5 24.a5 Rd8+/–) 23...Ned7 (23...Nb3 24.Qb3 ba5 25.Ra5 Ra5 26.Ra5+/–) 24.ab6 (24.a6 Nb3 25.Qb3 Nc5+/–) 24...Ra2+= 25.Ra2 cb6 26.Qd1 (26.Bf3 Ne5 27.Bd5 Rc8+/–) 26...Nb3 (26...Ne4 27.Qf1+=) 27.Qb3 Nc5 28.Qd5 Qe6 29.Qc6 (29.Bc4 Qd5 30.Bd5 Re5+/–) 29...Qa2+= 30.Qe8 Kg7 31.Bf1 Qa7 (31...Qe6 32.Qd8 d5 33.Be2+=) 32.Qc6+/– Qb7 (32...Qb8!?+/–) 33.Qd6 Qa7 34.Qc6 Qb7 (34...f5 35.h4+/–) 35.g3 Qc6 (35...Qa7 36.h3+–) 36.bc6+– Ne6 37.f4 h5 38.Bc4 Nc7 39.e4 Kf6 40.Kf2 b5 41.Bd5 Ke7 42.Ke3 f5 (42...h4 43.gh4 f5 44.Kd4+–) 43.Kd4 Nd5? (43...h4+–) 44.ed5 (44.Kd5 fe4 45.Ke4 Kd6=) 44...Kd6 45.Kc3 Kc7 46.Kb4 Kb6 47.h3 (47.h3 Kc7 48.Kc5+–) 1–0. Hauck,B – Kahl,KD, Ingelheim RH–ch, 1991.

5.Nf3 f5 6.d4 e4 7.Nfd2 Ngf6 8.Be2 0–0 9.Nc3 Kh8 10.0–0 c6 11.a4 d5 12.b5 Rg8 13.Qb3 Nf8 14.f3 Be6 15.a5 Qc7 16.f4 g5 17.b6 Qb8 18.cd5 Bd5 19.Nd5 cd5 20.ba7 Ra7 21.fg5 Rg5 22.h4 Rg4? (better is 22...Rg6 23.Rf2 N8d7+=) 23.Bg4+– Ng4 24.Rf4 (24.Rf5?! Qh2 25.Kf1 Qh1 26.Ke2 Qg2 27.Kd1 Qg1 28.Ke2 Qg2 29.Ke1 Bh4 30.Kd1 Nd7+=) 24...Ra6 (24...Ne6 25.Rg4! fg4 26.Qd5+–) 25.Rg4! (25.Rf5 Qh2 26.Kf1 Rf6 27.Rf6 Bf6–/+; 25.Qd5?! Ne3 26.Qf7 Bf6 27.Ne4 Bg7+–) 25...fg4 26.Qd5 Qg3 27.Nf1 (worse is 27.Qe4 Bh4 28.d5 Kg8+–; 27.Ne4 Qe3 28.Kh1 Re6+/–) 27...Qh4 28.Qe4 (worse is 28.Qb7 Rf6 29.g3 Rf1 30.Kf1 Qh1 31.Ke2 Qg2 32.Ke1 Qg1 33.Kd2 Qf2 34.Kc3 Qe3 35.Kc4 Qd3 36.Kd5 Ng6+/–) 28...Rh6 (28...Bg5 29.d5 (29.Qb7?! Rf6 30.d5 Be3 31.Ne3 Qf2 32.Kh1 Qh4 33.Kg1 Qf2 34.Kh2 Qh4 35.Kg1=) 29...Kg8 30.Ra4+–) 29.Qb7 (better is 29.g3 Qg5 30.Qb7+–) 29...Bd6?? (29...g3 30.Ng3! Qh2 31.Kf2 Rf6 32.Ke2 Qg3 33.Qe7 Rf2 34.Kd3 Qg6 35.Kc4 Qc6 36.Qc5 Qa6 37.Kb3 Qb7 38.Qb6 Qd5 39.Ka3 Nd7+–) 30.d5 Kg8 1–0. Forno,R (1880) – Panjkovic,A (2160), Condino ITA, 2012.

5.Nf3 Ngf6 6.Nc3 =.

5.Nf3 Ngf6 6.d3 0–0 7.Be2 c5 8.b5 a6 9.a4 Qa5 10.Qd2 Qb4?? (10...Qc7 11.Nc3=) 11.Qb4 (better is 11.Bc3 d5 12.Bb4 cb4 13.0–0+–) 11...cb4= 12.Nbd2 a5 13.0–0 b6 14.d4 ed4 15.Nd4 Ne8? (better is 15...Bb7!?+=) 16.Nc6 (better is 16.Bf3 Rb8 17.Nc6+–) 16...Bf6+= 17.Bf6 Nef6 18.Bf3 Ne5?? (better is 18...Re8 19.Nb4! Ra7+/–) 19.Ne5 (19.Ne7 Kh8 20.Ba8 Be6+–) 19...Rb8 20.Nc6 Rb7 21.Ne4 Rd7 (21...Ne4 22.Be4 Re8 23.Bf3+–) 22.Nf6 gf6 23.Bg4 Rc7 24.Bc8 Rcc8 (24...Rfc8 25.Rfd1 Rc6 26.bc6 Rc6 27.Kf1+–) 25.Ne7 Kg7 26.Nc8 Rc8 27.Rfc1 f5 28.f3 f6 29.Kf2 Kg6 30.Ra2 (30.Rab1 h6+–) 30...Rd8 (30...d5 31.c5! bc5 32.Rd2+–) 31.Rd2 Kf7 32.Ke2 Ke6 33.Rcd1 Rd7 34.Kd3 Ke5 35.Kc2 h6 36.g3 h5 (36...Ke6 37.Rd5+–) 37.Rd5 Ke6 38.Re1 Rc7 39.Kb3 Rc5 40.Rc5 bc5 (40...dc5 41.Rd1 Ke7 42.Rd5+–) 41.e4 fe4 42.Re4 Kd7 43.Rh4 Ke6 44.Rh5 f5 (44...Kd7 45.Rf5 Ke7 46.h4+–) 45.Rh6 (better is 45.Rh7 d5 46.b6 Ke5+–) 45...Ke5 (45...Ke7 46.Rh7 Kd8+–) 46.b6 Kd4 47.b7 Ke3 48.b8Q Kf3 (48...d5 49.Qf4 Kf2 50.Qd2 Kf1 51.Re6 dc4 52.Kc4 b3 53.Re1) 49.Qd6 Ke4 (49...f4 50.Qd2 fg3 51.Rf6 Kg4 52.Qf4 Kh3 53.Qg3) 50.Re6 Kf3 51.Qf4 Kg2 52.Re2 Kh3 53.Qh4 1–0. Fournier,Frederic – james68, Active, 2007.

5.Nf3 Ngf6 6.d4 ed4 7.Nd4 0–0 8.Be2 Ne5 (8...d5 9.b5 dc4 (9...Bb4 10.Bc3 Bd6 11.Nf5 Nb6 12.Nd6 Qd6 13.Nd2 Rd8=) 10.0–0 (10.Bc4 Ne5 11.Be2 c5 12.bc6 bc6 13.0–0 c5=) 10...Ne5 11.Nd2 Bg4 12.Bg4 Nfg4 13.Qe2 a6=; 8...Nb6 A) 9.b5 A1) 9...d5 10.cd5 (10.Nd2) 10...Bb4 11.Bc3 Bd6 12.0–0 Nbd5 13.Qd3 Re8=; A2) 9...a6 10.a4 d5 11.ba6 Nc4 12.ab7 Bb7 13.Bc4 dc4=; B) 9.Nd2 c5 10.bc5 dc5 11.N4f3 Bf5 12.Qb3 Re8 13.0–0 Qc7=) 9.Nd2 (9.0–0 c5 10.bc5 dc5 11.Nb5 Nc6 12.Qb3 Bf5 13.Rd1 Qb8=; 9.b5 Re8 (9...a6) 10.Nd2 (10.0–0 a6 11.Qc2 ab5 12.cb5 d5 13.a4 Bg4=; 10.Qc2 Bg4 11.Bg4 Neg4 12.0–0 a6 13.Nf5 ab5=) 10...a6 11.0–0 ab5 12.cb5 d5 13.a4 Bg4=) 9...Bd7 (9...c5 10.Nc2 Qb6 11.Rb1 cb4 12.Nb4 Re8 13.Nd5 Nd5=) 10.0–0 (10.a3 a5 11.0–0 Re8 12.b5 a4 13.Rb1 Qc8+=) 10...Nc6 (10...Re8 11.a3 a5 12.N2f3 ab4 13.ab4 Ra1=) 11.a3 (11.Nc6 Bc6 12.Qc2 Re8 13.Bd3 h6+=) 11...Nd4 12.ed4 (12.Bd4 Be6 13.Qb1 a5+=) 12...a6 (12...d5 13.c5 (13.Re1= Re8=) 13...Re8=) 13.Bf3 (13.d5 Re8+=) 13...Rb8 (13...c6=) 14.Re1 Re8 15.Qc2 c6 16.h3 (16.Ne4 Rc8+=) 16...Qc7 (16...d5 17.c5=) 17.Be2 Bf8 18.Bd3 g6 19.Nf3 Bg7 20.Rac1 Nh5 21.Qd2 Be6 22.g4 Nf6 23.d5 Bd7 24.Ba1 Re1 25.Qe1 Re8 26.Qd2 Qd8 27.Qf4 cd5 28.Qd6 dc4 29.Bc4 (worse is 29.Rc4 Be6 30.Qd8 Rd8 31.Bf6 Bf6–/+ (31...Bc4?! 32.Bd8 Bd3 33.Bc7+=)) 29...Bc6 30.Qd8 Rd8 31.Ne5 Bd5 (31...Be8!?+=) 32.Rd1+– (32.Rd1 b5 33.Ba2+/–) 1–0. Gross,W – Wagner,x, VDO–DB, 1994.

5.Nf3 Ngf6 6.Be2 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 0–0 6.Be2 Nbd7).

5.Nf3 Bf6

6.Qc2 a5 A) 7.b5 Nh6 (7...Ne7 8.d4 ed4 9.ed4 Ng6 10.Bd3 Qe7 11.Kd1 0–0 12.h4 Re8=; 7...Qe7 8.Nc3 Nb6 9.Bd3 a4 10.Bh7 a3 11.Bc1 Qe6 12.Be4 Qc4+=; 7...a4 8.d4 Ne7 9.Bd3 Ng6 10.0–0 0–0 11.a3 ed4 12.ed4 Nb6+=; 7...Ra7 8.d4 h6 9.Bd3 Ne7 10.0–0 ed4 11.Bd4 0–0 12.Nc3 Bd4+=) 8.d4 ed4 9.Qe4 Ne5 10.ed4 Bf5 11.Qb7 Rb8 12.Qa7 Nf3=; B) 7.ba5 Nh6 (7...Ne7 8.d4 ed4 9.ed4 Ng6 10.Bd3 Nf4 11.0–0 Nd3 12.Qd3 0–0=; 7...Ra5 8.d4 ed4 9.ed4 Nb6 10.Bd3 Na4 11.0–0 Nb2 12.Qb2 Ne7+=; 7...Qe7 8.Nc3 Qd8 9.d4 ed4 10.ed4 Nf8 11.Bd3 Bg4 12.Qe2 Qe7+/–) 8.d4 ed4 9.ed4 0–0 10.Bc1 Re8 11.Be2 c5 12.0–0 Nf5=; C) 7.a3 ab4 (7...Ne7 8.Nc3 ab4 9.ab4 Ra1 10.Ba1 Ng6 11.Be2 0–0 12.0–0 Re8=) 8.ab4 Ra1 9.Ba1 Ne7 10.d4 ed4 11.ed4 d5 12.c5 Ng6=.

6.Qc2 Qe7 7.Nc3 (7.e4 Qe6 (7...a5 8.b5 Nh6 9.Be2 0–0 10.0–0 a4 11.Rc1 Qe6 12.Rd1 Re8=; 7...Nh6 8.Nc3 c6 9.Be2 Nb6 10.0–0 0–0 11.d3 Bg4 12.a4 a5=; 7...c6 8.Be2 Nh6 9.0–0 0–0 10.a3 Nb6 11.d4 ed4 12.Bd4 Bd4=; 7...g5 8.h3 a5 9.b5 a4 10.Nc3 Nb6 11.Nd5 Nd5 12.cd5 g4+=) 8.Nc3 a5 9.ba5 c6 10.Rb1 Ne7 11.Be2 Ra5 12.0–0 0–0=; 7.d3 c6 (7...Nh6 8.Nc3 a5 9.b5 c6 10.Be2 0–0 11.0–0 Nc5 12.d4 Bf5=; 7...d5 8.a3 dc4 9.Qc4 c6 10.Nbd2 g6 11.Ne4 Bg7 12.b5 Nb6+/–; 7...a5 8.b5 Nh6 9.Nc3 c6 10.Be2 0–0 11.0–0 Nc5 12.d4 Bf5=; 7...Nb6 8.Be2 Bd7 9.0–0 Na4 10.Nc3 Nb2 11.Qb2 Qe6 12.d4 0–0–0+=) 8.Nc3 Nh6 9.Ne4 0–0 10.Nf6 Nf6 11.c5 Nd5 12.b5 Nb4=; 7.d4 a5 (7...ed4 8.Nd4 Bd4 9.Bd4 Ngf6 10.Nc3 c5 11.Bf6 Nf6 12.bc5 dc5+=) 8.b5 ed4 9.Nd4 a4 10.Nf5 Qf8 11.Bf6 Ngf6 12.Nc3 Nb6=) 7...c6 (7...Nb6 8.Nd5 Nd5 9.cd5= a5 10.Qa4 Bd7 11.Bb5 e4 12.Nd4 Qd8=; 7...a5 8.Nd5 Qd8 9.b5 c6 10.Nc3 Nh6 11.bc6 bc6 12.Ne4 Be7+=) 8.Be2+= b6 (8...Nh6 9.0–0+= Nb6 10.Ne4 Bf5 11.c5 Be4 12.Qe4 dc5+=; 8...a5 9.b5 Nb6 10.bc6 bc6 11.Ne4 Nd7 12.Rb1 Qe6+/–) 9.0–0 g5 (9...Qe6 10.d4 Bb7 (10...a6 11.d5 cd5 12.cd5+– Qe7+/–) 11.d5 cd5 12.cd5 Qe7+/–) 10.d4 (10.Qe4 Bb7+/– 11.d4 Bg7 12.Qf5 h6+/–) 10...g4 11.Nd2 (11.Ne1 Nh6 (11...h5+/– 12.Ne4 ed4+/–) 12.Rd1 Bg7+/–) 11...ed4 12.ed4 Bd4 13.Nd5! Qe5? (13...cd5 14.Bd4) 14.Bd4+– Qd4 15.Nc7 Kd8 16.Na8 Ngf6 (16...Bb7 17.Qa4 Qd2 18.Qa7 Ba8 19.Qa8 Ke7 20.Qc6+–) 17.Rad1 (better is 17.Nb3 Qf4 18.g3 Qg5+–) 17...Qf4 (17...Bb7 18.Qa4 a5+–) 18.Qa4 Ne4 (18...Re8 19.Rfe1 Bb7 20.Qa7 Ba8 21.Qa8 Kc7 22.Qa7 Kd8 23.g3+–) 19.Ne4 Qe4 20.Bd3 (better is 20.Qa7 Ke8 21.Qc7 Kf8+–) 20...Qe6 (20...Qe7 21.Qa7 Ne5 22.Qb6 Ke8+–) 21.Qa7 Ke7 22.Rfe1 (22.Rfe1 Kf6 23.Re6 fe6 24.Nb6 Nb6 25.Qb6+–) 1–0. Levin,Anatoly – Malloy,Thomas, US Amateur Team East, Parsippany USA, 2005.

6.Qc2 Ne7 A) 7.d4 ed4 (7...a5 8.b5 ed4 9.ed4 Ng6 10.Bd3 Qe7 11.Kd1 0–0 12.h4 Re8=) 8.ed4 d5 9.c5 Ng6 10.Bd3 Nf4 11.0–0 Nd3 12.Qd3 0–0=; B) 7.Bd3= a5 8.b5 Nc5 9.Nc3 Bg4 10.Ne4 Nd3 11.Qd3 Ng6 12.Qd5 Bf3=; C) 7.Be2 c5 (7...0–0 8.Bd3 h6 9.0–0 c6 10.a3 a5 11.b5 cb5 12.cb5 d5=; 7...a5 8.b5 Nc5 9.Nc3 a4 10.0–0 a3 11.Bc1 0–0 12.e4 Ng6=; 7...e4 8.Nd4 c5 9.bc5 dc5 10.Nb5 Qb6 11.N1c3 a6 12.Na4 Qc6+=) 8.bc5 Nc5 9.Nc3 0–0 10.0–0 Bf5 11.e4 Bg4 12.h3 Bd7=; D) 7.a3 a5 (7...e4 8.Nd4 a5 9.Nc3 Bd4 10.ed4 ab4 11.ab4 Ra1 12.Ba1 d5=) 8.Nc3 ab4 9.ab4 Ra1 10.Ba1 Ng6 11.Ne4 Be7 12.Be2 f5=; E) 7.Nc3 a5 (7...Nc6 8.b5 Na5 9.Ne4 a6 10.ba6 ba6 11.Qa4 Rb8 12.Rb1 Nb7+=; 7...Ng6 8.Be2 0–0 9.0–0 c6 10.d4 ed4 11.Nd4 Bd4 12.ed4 Nf4+=) 8.b5 Nc5 9.Be2 Bg4 10.0–0 e4 11.Nd4 Be2 12.Nde2 Qd7+=.

6.Nc3 a5 A) 7.ba5 Ra5 (7...Ne7 8.d4 ed4 9.ed4 Ra5 10.Bd3 d5 11.Nd5 Nd5 12.cd5 0–0=; 7...Nh6 8.Be2 Ra5 9.d4 ed4 10.ed4 0–0 11.Nd5 Re8 12.0–0 b6=; 7...e4 8.Nd4 Nc5 9.Nb3 Bf5 10.Nc5 dc5 11.Qb3 Ra7 12.Rb1 Ne7+=) 8.Ne4 Be7 9.d4 ed4 10.Be2 Ngf6 11.Nf6 Bf6 12.ed4 0–0=; B) 7.b5 Nh6 (7...Ne7 8.Ne4 Nf5 9.Qc2 a4 10.d4 a3 11.Bc3 ed4 12.ed4 d5+=; 7...e4 8.Nd4 Nc5 9.Qc2 Qe7 10.Nd5 Qd8 11.Be2 Be5 12.f4 ef3+=; 7...Nb6 8.d4 Be6 9.de5 de5 10.c5 Nc4 11.Bc4 Qd1 12.Nd1 Bc4+=) 8.Be2 0–0 9.0–0 Re8 10.d4 ed4 11.Nd4 Be5 12.Nd5 a4=; C) 7.Qa4 Ne7 (7...c6 8.Ne4 Be7 9.c5 dc5 10.bc5 Nc5 11.Nc5 Bc5 12.Ne5 Bb4+=; 7...Nh6 8.Ne4 0–0 9.c5 Be7 10.Bc4 dc5 11.bc5 Bc5 12.Ne5 Bb4=; 7...Ra6 8.b5 Nb6 9.Qc2 Ra8 10.Ne4 Be7 11.c5 Nd7 12.cd6 cd6+=) 8.Ne4 0–0 9.Be2 Ng6 10.d4 Nb6 11.Qb3 ab4 12.0–0 Na4=; D) 7.a3 Nh6 (7...Ne7 8.Ne4 0–0 9.Be2 Ng6 10.0–0 Be7 11.d4 f5 12.Nc3 Nf6+=; 7...ab4 8.ab4 Ra1 9.Ba1 Ne7 10.Ne4 Ng6 11.Be2 Be7 12.0–0 f5+=; 7...e4 8.Nd4 ab4 9.ab4 Ra1 10.Ba1 Bd4 11.ed4 Ngf6 12.d3 d5+=) 8.d4 ed4 9.Nd4 0–0 10.Be2 ab4 11.ab4 Ra1 12.Ba1 c5=.

6.Nc3 b6 7.d4 c5 (7...ed4 8.Nd4 Ne5 9.Be2+=) 8.bc5 (8.dc5 dc5 9.Qd5 Rb8+/–) 8...bc5 9.Nd5 Bb7 10.Nf6 Ngf6 11.de5 Qa5 (better is 11...Bf3!? 12.Qf3 Ne5 13.Be5 de5=) 12.Qd2+/– Qd2 13.Nd2 (13.Kd2!? de5 14.Ne5+/–) 13...de5= 14.f3 0–0 (14...Rb8 15.Rb1=) 15.Bd3 Rae8 16.Bf5 Bc8 (16...Rb8 17.Rb1=) 17.Bd7 Nd7 18.e4 f6 19.0–0 Nb6 20.Ba3 Ba6 (better is 20...Rd8!? 21.Rf2 Rd2 22.Rd2 Nc4+=) 21.Bc5+/– Rf7 22.Bb6 ab6 23.Rab1 Rb8 24.a4 Bb7? (better is 24...Rd7 25.Rfd1 Rbd8 26.Rb6 Bc4+/–) 25.Rb6+– h6 26.a5 Rff8 (26...Rd8 27.Rd1+–) 27.a6 Ba8 28.c5 Rfc8 (28...Kf7 29.Rfb1 Rbc8 30.Nb3+–) 29.a7 (29.Rfb1!? Rb6 30.cb6 Kf7+–) 29...Rb7 30.Rb7 Bb7 31.Rb1 Rc7 (31...Ba8+–) 32.Rb7! Rb7 33.a8Q Kh7 34.Qb7 (34.Qb7 f5 35.Nc4+–) 1–0. Melzig,Ernst – Altheim,Andreas, 5 sen. WttgEM/Ellwangen, 1993.

6.Nc3 e4 7.Nd4 Bd4 (7...c5 8.bc5 dc5 9.Ndb5 Be5 10.Nd5 Bb2 11.Nbc7 Kf8 12.Rb1 Rb8+=; 7...a5 8.Ne4 ab4 9.Qb3 Be5 10.Nb5 Bb2 11.Qb2 Ngf6 12.Nf6 Nf6+=) 8.ed4 Ndf6 9.d3 a5 10.Qa4 Bd7 11.b5 Bf5 12.de4 Ne4+=.

6.Nc3 Ne7 A) 7.d4 ed4 (7...0–0 8.Ne4 ed4 9.Nf6 Nf6 10.Nd4 a5 11.a3 Bg4 12.f3 Be6+=; 7...a5 8.b5 ed4 9.ed4 d5 10.cd5 Nb6 11.Bd3 Ned5 12.0–0 0–0+=) 8.Nd4 a5 9.b5 0–0 10.Be2 Nc5 11.0–0 a4 12.a3 Be6=; B) 7.Ne4 Nf5 (7...a5 8.c5 0–0 9.cd6 cd6 10.Ba3 Nf5 11.g4 Nh4 12.Nh4 Bh4=; 7...Ng6 8.Be2 a5 9.ba5 Be7 10.0–0 0–0 11.d4 f5 12.Ng3 e4=; 7...0–0 8.Be2 a5 9.a3 Nf5 10.0–0 Re8 11.d3 Qe7 12.Qd2 Qe6+=) 8.d4 ed4 9.g4 Nh4 10.Nh4 Bh4 11.Bd4 Qe7 12.Nc3 c6=; C) 7.Be2 a5 (7...0–0 8.Ne4 a5 9.a3 Ng6 10.0–0 Be7 11.d4 f5 12.Nc3 Nf6+=; 7...e4 8.Nd4 c5 9.bc5 dc5 10.Nb3 b6 11.Qc2 Bb7 12.0–0 Qc7+=) 8.b5 0–0 9.0–0 e4 10.Nd4 Bd4 11.ed4 d5 12.cd5 Nf6=.

6.d4 c5 A) 7.a3 Ne7 (7...Nh6 8.de5 de5 9.Nc3 0–0 10.Bd3 a5 11.b5 Be7 12.Nd5 Bd6+/–; 7...Qb6 8.Nc3 Ne7 9.Ne4 ed4 10.ed4 0–0 11.dc5 dc5 12.Bf6 Nf6+=; 7...ed4 8.ed4 Ne7 9.Bd3 Qb6 10.Nc3 cd4 11.Na4 Qc7 12.Nd4 Ne5=; 7...cd4 8.ed4 Qe7 9.Be2 e4 10.Nfd2 e3 11.fe3 Qe3 12.Nf3 Nb6+=) 8.bc5 ed4 9.Bd4 Qa5 10.Qd2 Qd2 11.Nbd2 dc5 12.Bf6 Nf6=; B) 7.Bc3 cd4 (7...ed4 8.ed4 Ne7 9.Be2 Qb6 10.bc5 dc5 11.0–0 0–0 12.d5 Rd8=; 7...Nh6 8.Bd3 Qe7 9.bc5 dc5 10.de5 Ne5 11.Ne5 Be5 12.Qc2 Ng4=; 7...Qe7 8.bc5 dc5 9.Be2 Nh6 10.0–0 e4 11.Nfd2 0–0 12.d5 Re8=; 7...Ne7 8.bc5 ed4 9.Bd4 Qa5 10.Qd2 Qd2 11.Nbd2 dc5 12.Bf6 Nf6=) 8.ed4 Ne7 9.Bd3 0–0 10.Qc2 ed4 11.Nd4 Qb6 12.Nf3 Nc6=; C) 7.Nc3 ed4 (7...cb4 8.Nb5 Qb6 9.de5 de5 10.Qd5 Nh6 11.Ne5 Ne5 12.c5 Qa5+=) 8.ed4 cb4 9.Nd5 Nb6 10.Nb6 Qb6 11.Bd3 Ne7 12.0–0 0–0=; D) 7.bc5 ed4 8.ed4 dc5 9.Nc3 cd4 10.Nd5 Nb6 11.Nf6 Nf6 12.Qe2 Be6=.

6.d4 a5

7.Qa4 c6 (7...ed4 8.Bd4 c6 9.b5 c5 10.Bc3 Nb6 11.Qc2 d5 12.Nbd2 Bf5=; 7...Ne7 8.de5 de5 9.Nc3 0–0 10.Ne4 Nb6 11.Nf6 gf6 12.Qb3 ab4+=) 8.b5 Nb6 9.Qd1 e4 10.Nfd2 cb5 11.cb5 d5 12.Be2 Ne7=.

7.ba5 Ra5 8.Qc2 (8.Be2 Ne7 9.c5 0–0 10.cd6 cd6 11.Nbd2 ed4 12.Nd4 Nc5 13.Nc4=; 8.Bd3 Qe7 9.Nbd2 ed4 10.Nb3 Ra8 11.Bd4 Bd4 12.Nfd4 Ne5 13.Qc2=; 8.Qd2 b6 9.Bd3 Qe7 10.Bc3 Ra7 11.Qc2 Bb7 12.d5 Nc5 13.e4=; 8.Nc3 ed4 9.ed4 Ne7 10.Bd3 d5 11.Nd5 Nd5 12.cd5 0–0 13.0–0=) 8...ed4 9.ed4 Nb6 10.Bd3 Na4 11.0–0 Nb2 12.Qb2 Ne7 13.Nbd2+=.

7.ba5 Ra5 8.Bd3 Qe7 9.Nbd2 ed4 10.Nb3 Ra8 11.Bd4 Bd4 12.Nfd4 Ne5 =.

7.ba5 ed4 8.ed4 (8.Bd4 Ra5 9.Be2 Ne7 10.0–0 0–0 11.Bd3 Nc6 12.Qc2 Rh5 13.Be4=) 8...Ne7 9.Bd3 Nc5 10.Be2 0–0 11.0–0 Bf5 12.Re1 Re8 13.Nc3=.

7.ba5 Ne7 8.Bc3 ed4 9.ed4 0–0 10.Bd3 d5 11.0–0 dc4 12.Bc4 Nc6 13.Re1+=.

7.ba5 Ne7 8.Bd3 ed4 9.ed4 Nc5 10.Be2 0–0 11.0–0 Bf5 12.Re1 Re8 =.

7.ba5 Nh6 8.Bd3 ed4 9.ed4 Qe7 10.Be2 0–0 11.0–0 Re8 12.Re1 Ra5 +=.

7.b5 a4 8.Bd3 ed4 9.ed4 Nc5 10.Qe2 Qe7 11.0–0 Qe2 12.Be2 Ne7 13.Re1+=.

7.b5 ed4 8.ed4 Ne7 9.Nc3 d5 10.cd5 Nb6 11.Bd3 Nbd5 12.0–0 Bg4 13.Ne4+=.

7.b5 ed4 8.ed4 Ne7 9.Bd3 d5 10.cd5 Nc5 11.Bc4 Nd5 12.Qe2 Qe7 =.

7.b5 ed4 8.Bd4 Nh6 9.Nc3 0–0 10.Bd3 Bd4 11.Nd4 Ne5 12.0–0 Nhg4 13.Be2 =.

7.b5 ed4 8.Nd4 Ne7 9.Bd3 Ne5 10.0–0 Nd3 11.Qd3 0–0 12.Nc3 Re8 13.Nd5 =.

7.b5 Qe7 8.Nc3 Nb6 9.c5 ed4 10.cd6 cd6 11.Nd4 Nh6 12.Qd3 a4 +=.

7.b5 Qe7 8.Be2 Nh6 9.Nc3 0–0 10.Nd5 Qd8 11.Nf6 Qf6 12.Bd3 Qe7 13.Qc2+=.

7.de5 Be5 (7...de5 8.Qa4 Qe7 9.a3 c6 10.e4 Nh6 11.Be2 Nb6 12.Qb3 ab4=; 7...Ne5 8.Ne5 Be5 9.Be5 de5 10.Qd8 Kd8 11.b5 Nf6 12.Nc3 Ke7=) 8.Ne5 de5 9.Qa4 Qe7 10.c5 Ngf6 11.Bc4 0–0 12.0–0 e4=.

6.d4 ed4

7.ed4 a5 8.ba5 Ne7 9.Bd3 Nc5 10.Be2 0–0 11.0–0 Bf5 12.Re1 Re8 13.Bc3 =.

7.ed4 a5 8.b5 Ne7 9.Nc3 d5 10.cd5 Nb6 11.Bd3 Ned5 12.0–0 0–0 13.Qb1 =.

7.ed4 a5 8.b5 Ne7 9.Bd3 d5 10.cd5 Nc5 11.Bc4 Nd5 12.Qe2 Qe7 =.

7.ed4 Nb6 8.Be2 d5 9.c5 Nc4 10.Bc4 dc4 11.0–0 Ne7 12.Nbd2 Be6 13.Ne4 +=.

7.ed4 c5 8.b5 (8.a3 Qb6 9.Nc3 Ne7 10.Ne4 0–0 11.dc5 dc5 12.Bf6 Nf6 13.Nc5+=; 8.Bd3 cb4 9.0–0 Ne7 10.Qc2 h6 11.Qd2 Qb6 12.Qf4 d5 13.Nbd2=; 8.bc5 dc5 9.Nc3 cd4 10.Nd5 Nb6 11.Nf6 Nf6 12.Qe2 Be6 13.Nd4=; 8.Qd2 Ne7 9.Nc3 0–0 10.Ne4 Nc6 11.0–0–0 cb4 12.Nd6 Qa5 13.d5=) 8...Ne7 (8...Nb6 9.Nbd2 d5 10.Rc1 Bg4 11.cd5 cd4 12.h3 Bf3 13.Nf3=) 9.Be2 (9.Bd3 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 d5 13.cd5=) 9...0–0 (9...d5 10.0–0 dc4 11.Qc2 cd4 12.Bd4 Bd4 13.Nd4=) 10.Nbd2 (10.0–0 Re8 11.Re1 a6 12.ba6 ba6 13.Nbd2=) 10...Nf5 (10...d5 11.0–0 a6 12.cd5 Nd5 13.Ne4=) 11.Ne4 (11.Nb3 Nb6 12.0–0 Be6 13.Qc2=) 11...Re8 (11...a6 12.ba6 ba6 13.Nf6=) 12.Nf6 Qf6 13.0–0 (13.Qd2=) 13...b6 (13...a6 14.ba6 ba6 15.Re1=) 14.Rb1 Qg6 (14...cd4 15.Nd4 Bb7 16.Nc6+=) 15.Bd3 Nf6 (15...Qh5!?+=) 16.Qc2+/– Qg4 (16...Qh5 17.dc5 dc5 18.Rbe1+/–) 17.dc5+– Nh4 (better is 17...dc5 18.Rbe1 Re1 19.Re1 Nd4 20.Nd4 cd4+–) 18.Nh4 Qh4 19.Rbe1 (19.cd6 Nd7+–) 19...Be6 (19...Re1 20.Re1 dc5 21.Bf6 gf6 22.Be4+–) 20.cd6 Ng4 (20...Rad8 21.f4+–) 21.h3 Nf6 22.Bf6 gf6 23.Be4 (23.Re3 Red8 24.Rd1 Rac8+–) 23...Rac8 24.Bc6 Bh3 (24...Red8 25.Rd1 Qc4 26.Qc4 Bc4+–) 25.gh3 (25.Be8?! Bg2 26.f4 Qh1 27.Kf2 Bf1+–) 25...Qh3 26.Qb3 (26.Qb3 Qg4 27.Qg3 Qg3 28.fg3+–) 1–0. Vukovic,Ljubomir (1980) – Dimitrijevic,Radmilo, Jezero Open, Belgrade YUG, 2003.

7.ed4 Qe7 8.Qe2 Nb6 9.Nbd2 Na4 10.0–0–0 Nb2 11.Kb2 Be6 12.Ne4 0–0–0 13.Nf6 =.

7.ed4 Qe7 8.Qe2 Nb6 9.Nbd2 Na4 10.0–0–0 Nb2 11.Qe7 Ne7 12.Kb2 Bf5 =.

7.ed4 Qe7 8.Be2 d5 9.c5 Qd8 10.0–0 Ne7 11.Bd3 0–0 12.Qc2 g6 13.Nbd2 +=.

7.ed4 Ne7 8.Qb3 d5 9.Bd3 dc4 10.Bc4 0–0 11.Ne5 Be5 12.de5 Nb6 13.0–0 =.

7.ed4 Ne7 8.Nc3 0–0 9.Bd3 Nc6 10.a3 Nb6 11.0–0 Bg4 12.c5 dc5 13.bc5 =.

7.ed4 Ne7 8.Bd3= a5 9.b5 d5 10.cd5 Nc5 11.Bc4 Nd5 12.Qe2 Qe7 13.Qe7 =.

7.ed4 Ne7 8.Be2 d5 9.Ne5 0–0 10.0–0 dc4 11.Bc4 Nb6 12.Bd3 Bf5 13.Bf5 =.

7.Bd4 a5 8.b5 Nh6 9.Be2 Nf5 10.0–0 0–0 11.Nbd2 Re8 12.Re1 Bd4 =.

7.Bd4 Nb6 8.a3 Bd4 9.Nd4 Nf6 10.c5 dc5 11.bc5 Nbd7 12.c6 Ne5 13.Nc3 =.

7.Bd4 Nb6 8.a4 Be6 9.Nbd2 c5 10.Bf6 Nf6 11.bc5 dc5 12.a5 Nc8 13.Qa4 +=.

7.Bd4 Nb6 8.Nc3 Be6 9.c5 Nd5 10.Ne4 Nb4 11.cd6 cd6 12.Qa4 Nc6 13.Ba6 +/–.

7.Bd4 Nb6 8.Nbd2 Bd4 9.Nd4 c5 10.bc5 dc5 11.Nb5 a6 12.Nc3 Nf6 13.Nde4 +=.

7.Bd4 Nb6 8.Be2 Be6 9.Nbd2 Bd4 10.ed4 Nf6 11.0–0 0–0 12.Re1 Re8 13.Bd3 =.

7.Bd4 Nb8 8.a3 Nc6 9.Be2 a5 10.b5 Nd4 11.ed4 Ne7 12.Nc3 0–0 13.0–0 =.

7.Bd4 Nb8 8.b5 Bd4 9.ed4 a6 10.Be2 ab5 11.cb5 Nf6 12.0–0 0–0 =.

7.Bd4 Nb8 8.Be2 Nc6 9.Qd2 a5 10.ba5 Nh6 11.0–0 Nd4 12.ed4 0–0 13.Nc3=.

7.Bd4 Ne7 8.Nc3 a5 9.b5 0–0 10.Bd3 Bd4 11.ed4 Re8 12.0–0 Nf6 13.Re1 +=.

7.Bd4 Ne7 8.Bf6 Nf6 9.Bd3 a5 10.Qa4 Qd7 11.b5 0–0 12.0–0 Qg4 =.

7.Bd4 Ne7 8.Bf6 Nf6 9.Bd3 a5 10.b5 0–0 11.0–0 Bg4 12.Nc3 Re8 13.h3 =.

7.Bd4 Nh6 8.a3 Nf5 9.Bd3 Nd4 10.ed4 a5 11.Nc3 ab4 12.ab4 Ra1 13.Qa1 =.

7.Bd4 Nh6 8.Nc3 0–0 9.Bd3 a5 10.b5 Bd4 11.Nd4 Ne5 12.0–0 Nhg4 13.Nd5 =.

7.Bd4 Nh6 8.Nbd2 a5 9.b5 0–0 10.Be2 Nf5 11.0–0 Re8 12.Re1 Bd4 13.ed4 =.

7.Bd4 Nh6 8.Bd3 c5 9.bc5 dc5 10.Bf6 Qf6 11.Nbd2 Ne5 12.Ne5 Qe5 13.0–0 +=.

7.Bd4 Nh6 8.Be2 Nf5 9.Nc3 Nd4 10.ed4 0–0 11.0–0 Re8 12.Re1 c5 13.Nd5 =.

7.Nd4? c5 –+.

4.c4 f5

5.a4 Nf6 6.Nf3 0–0 7.b5 (7.d4 e4 8.Nfd2 d5 9.b5 Be6 10.Ba3 Nbd7 11.Be7 Qe7=; 7.d3 e4 8.Nfd2 (8.Nd4 c5 9.Nc2 Be6 10.d4 cb4 11.d5 Bd7+=; 8.Ng5 d5 9.Qb3 Nc6 10.b5 Na5 11.Qc3 c6=) 8...Nc6 9.b5 Nb4 10.de4 fe4 11.Nc3 Bf5=) 7...a6 (7...e4 8.Nd4 a6 9.Be2 ab5 10.ab5 Ra1 11.Ba1 c5=; 7...c6 8.Be2 (8.d3 a6 9.Be2 ab5 10.ab5 Ra1 11.Ba1 cb5=) 8...e4 9.Nd4 c5 10.Nb3 Be6 11.d4 ed3=) 8.Nc3 (8.Be2 e4 9.Nd4 ab5 10.ab5 Ra1 11.Ba1 c5=) 8...Be6 (8...e4 9.Ng5 (9.Nd4+= c5 10.bc6 Nc6 11.Nce2 Ng4+=) 9...ab5 10.ab5 Ra1 11.Qa1 Ng4=) 9.Be2 Nbd7 (9...ab5 10.ab5 Ra1 11.Qa1= Ne4=; 9...Qe8 10.d4 e4 11.Ng5 Bd7=) 10.Ng5 Bf7 (10...Nc5 11.d4 ed4+=) 11.Nf7 (11.0–0 ab5+=) 11...Rf7 12.0–0 c5 (12...ab5 13.ab5 Ra1 14.Qa1+=) 13.d3 (13.Qc2 ab5 14.ab5 Ra1 15.Ra1 Ne8+/–) 13...Nf8 14.Bf3 Rb8 15.Qb3 Ng6 16.Bd5 (16.Nd5 Kh8+/–) 16...Nd5+= 17.Nd5 f4 18.ef4 Nf4 19.Nf4 Rf4 20.Bc1 Rf8 21.Be3 Bg5 22.Rae1 Be3 23.Re3 Ra8 24.Qd1 ab5 25.ab5 b6 26.Qg4 Qc8 (26...Ra2 27.f4 Rf6 28.Rg3=) 27.Qe4 (27.Qc8 Rfc8 28.f4 Re8+=) 27...Qf5 28.Qd5 Qf7 29.Qd6?? (better is 29.Qe4=) 29...Qf2 0–1. Timmermans,Mark (1835) – Hortensius,Nick (1770), Euro Chess Tournament, 2005.

5.a4 Nf6 6.Nf3 e4 A) 7.Nd4 c5 (7...0–0 8.b5 a6 9.Be2 c5 10.bc6 bc6 11.0–0 c5=) 8.Nc2 0–0 9.Nc3 Nc6 10.bc5 dc5 11.d4 ed3+=; B) 7.Ng5 0–0 (7...h6 8.Nh3 Nc6 9.b5 Ne5 10.Nf4 Rg8 11.a5 a6=; 7...Nc6 8.b5 Ne5 9.f4 Ng6 10.Be2 0–0 11.0–0 h6=; 7...Na6 8.Qb3 c5 9.b5 Nb4 10.Be2 Qa5 11.0–0 0–0=) 8.Nc3 Nc6 9.b5 Ne5 10.d4 Neg4 11.h3 Ne3=.

5.b5 Nh6 (5...Nf6 6.d4 e4 7.Ne2= (7.Nh3 a6 8.d5 0–0 9.Nf4 ab5 10.cb5) 7...a6 8.Nf4 0–0 9.d5 Ne8 10.Be2) 6.Nc3 (6.d4 Nf7 7.de5 (7.Be2 Nd7 8.Nf3 e4 9.Nfd2 a6 10.ba6; 7.Nh3 0–0 8.Bd3 a6 9.0–0 ab5 10.cb5; 7.Nf3 Nd7 8.Be2 0–0 9.0–0 e4 10.Nfd2) 7...de5 8.Qd8 Bd8 9.Nf3 Nd7 10.Be2) 6...Nd7 (6...Ng4 7.Be2= 0–0 8.Nf3 Nf6 9.0–0 e4 10.Ng5; 6...0–0 7.d4 (7.Nd5 c6 8.Ne7 Qe7 9.d4 f4 10.de5) 7...Be6 8.Nf3 e4 9.d5 Bf7 10.Nd4; 6...Be6 7.d4 (7.Nf3 0–0 8.d4 e4 9.d5 Bd7 10.Nd4) 7...0–0 8.Nf3 e4 9.d5 Bd7 10.Nd4) 7.Nf3 (7.Qh5 Kf8= 8.d4 Nf6 9.Qh3 Nhg4 10.Qf3) 7...c6 (7...Bf6 8.Nd5= (8.Be2 0–0 9.0–0 a6 10.d4) 8...Nf7 9.Qc2 e4 10.Nd4; 7...0–0 8.Be2 Nb6 9.d4 e4 10.Nd2) 8.a4 (8.Be2 0–0= (8...Nf6 9.0–0 0–0 10.d4) 9.0–0 a6 10.d4) 8...a6 (8...Nf6 9.Be2= (9.d3 0–0 10.Be2) 9...0–0 10.d4) 9.Be2 0–0 (9...Nf6 10.0–0=) 10.0–0 Bf6 (10...Nf6 11.d4 e4 12.Nd2=) 11.d4+= f4. Gerold – Rathmann, corr, 1973.

5.Nc3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nc3 Be7).

5.Nc3 Nf6 6.Nf3 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Nc3).

5.d4 ed4 A) 6.Nf3 de3 7.Bg7 Bf6 8.Bh8 Bh8 9.Na3 Ba1 10.Qa1–/+; B) 6.Ne2 Bf6 7.ed4 Ne7 8.Nf4 0–0 9.Nh5 d5 10.Be2=; C) 6.b5 Nf6 (6...Bf6 7.Bd4 Bd4 8.ed4 Nf6 9.Bd3 0–0 10.Qf3=) 7.Bd4 0–0 8.Nf3 c5 9.bc6 Nc6 10.Bd3=; D) 6.a3 Nf6 7.ed4 0–0 8.Bd3 a5 9.b5 d5 10.Nf3=; E) 6.ed4 Nf6 7.Nf3 0–0 8.Bd3 d5 9.c5 b6 10.0–0+=.

5.d4 Bd7 6.a3 e4 (6...Bf6 7.Nf3 e4 8.Nfd2 Nh6 9.Be2 0–0 10.0–0+=; 6...ed4 7.Nf3 Nf6 8.Nd4 c5 9.Nf3 Na6 10.b5+=) 7.Be2 Nf6 8.Nh3 a5 9.0–0 ab4 10.ab4=.

5.d4 Nd7 6.Nh3 Bf6 (6...Nh6 7.Qh5 Nf7 8.Qf5 Nf6 9.Qc2 0–0 10.Ng1=; 6...a5 7.b5 Bf6 8.Be2 Ne7 9.Bh5 g6 10.Be2=; 6...c6 7.Be2 Qb6 8.Bc3 Qc7 9.0–0 Ngf6 10.Ng5+=) 7.Bd3 Ne7 8.0–0 0–0 9.Qd2 c5 10.Na3=.

5.d4 e4 A) 6.Nh3 Nf6 7.Nf4 0–0 8.Be2 g5 9.Nh3 h6 10.Qb3=; B) 6.Be2 Nf6 (6...d5 7.a3 Nf6 8.Nh3 a5 9.b5 Be6 10.Nf4+=) 7.Nh3 d5 8.c5 Qd7 9.Nf4 b6 10.Nc3=; C) 6.d5 Nf6 7.Ne2 a5 8.b5 0–0 9.Nf4 g5 10.Ne2=; D) 6.Ne2 Nf6 (6...a5 7.Qa4 Bd7 8.b5 Nf6 9.Nf4 0–0 10.Be2=) 7.Nf4 0–0 8.Be2 g5 9.Nh3 h6 10.Qb3=; E) 6.Qh5 g6 7.Qe2 Nf6 8.Nc3 0–0 9.Nh3 d5 10.b5=; F) 6.a3 Nf6 7.Ne2 0–0 8.Nf4 a5 9.d5 Na6 10.Be2=; G) 6.Nd2 Nf6 7.d5 0–0 8.Ne2 a5 9.a3 Bd7 10.Nf4=; H) 6.Nc3 Nf6 (6...Bd7 7.Be2 Nf6 8.Nh3 a6 9.0–0 0–0 10.Nf4+=) 7.Nge2 Nc6 8.Nf4 a6 9.Be2 Bd7 10.b5+=.

5.Nf3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7).

5.Nf3 Bf6

6.Nc3 c6 (6...Ne7 7.d4 e4 8.Nd2= 0–0 9.g4 Bh4 10.Qb3=; 6...e4 7.Nd4 Bd4 8.ed4 Nf6 9.Be2 0–0 10.d3=) 7.d4 e4 8.Nd2 Ne7 9.c5 (9.Qh5 g6 10.Qd1=) 9...d5 (9...Be6 10.Qh5=) 10.Nb3 (10.Qh5 g6 11.Qh6 Ng8=) 10...Nd7 11.a4 (11.Be2 0–0=) 11...0–0 12.g3 Rf7 13.b5 Nf8 14.h4 (14.Be2 Ne6=) 14...g6 (14...Ne6 15.Be2+=) 15.Nd2 Ne6 16.Qb3 (16.Qc2=) 16...f4 (better is 16...b6!?+=) 17.gf4+= Nf5 (17...b6 18.f5 Nf5 19.h5 bc5 20.hg6 hg6 21.dc5 Nc5 22.Qa3+=) 18.h5+/– Ned4 (18...gh5!? 19.Rb1 h4+/–) 19.ed4+– Nd4 20.Qa2 (better is 20.Qd1!?+/–) 20...Bg4 21.Be2 gh5 (21...Bh5 22.Bh5 Nc2 23.Kd1 Na1 24.Bg4+– (24.Qa1?! gh5 25.Rh5 a6=)) 22.Bg4 (22.Rb1!?+/–) 22...hg4= 23.0–0–0 (23.Rb1 Qc7 24.f5 Nc2 25.Ke2 Nb4=) 23...Qc7 24.Nd5 (better is 24.f5=) 24...cd5–/+ 25.Qd5 Ne2 (25...Rd8 26.Qh5 Qf4 27.Kb1–/+) 26.Kb1–/+ Nf4 27.Qc4 (27.Qe4 Bb2 28.Kb2 Qc5 29.Rh7 Rh7 30.Qf4 Rg7–+) 27...Bb2–+ 28.Ne4 Bg7 29.Nd6 Raf8 30.Rhe1 Ng6 31.Nf7 Qf7 32.Qf7 Rf7 33.Re8 Bf8 34.Rc8? (better is 34.c6 bc6 35.bc6–/+) 34...Rf2–+ (34...Rf2 35.Rcd8 Rf4–+) 0–1. Wolf,M – Trautmann,Klaus, corr DDR, 1977.

6.d4 Nc6 7.b5 Nce7 (7...e4 8.bc6 ef3 9.Qf3 bc6 10.Qc6 Bd7 11.Qf3+/–) 8.de5+– de5 9.Qd8 Kd8 10.Be5 Bd7 (10...Ng6 11.Bc3+–) 11.c5 (11.Nbd2 Ng6 12.Bd4 a6+–) 11...Rc8 (11...a6 12.ba6 ba6 13.a3+–) 12.Nbd2 c6 13.Nc4 cb5 14.Nd6 Rc5?? (14...Ng6 15.Bf6 Nf6 16.Nc8 Kc8+–) 15.Nb7 Ke8 (15...Kc8 16.Nc5 Bc6 17.Bf6 Nf6 18.Nd4+–) 16.Nc5 Be5 (16...Bc6 17.Bf6 Nf6 18.Ne5+–) 17.Ne5 Nf6 (17...Bc8 18.Bb5 Kf8 19.Rd1+–) 18.Ned7 Nd7 19.Bb5 (19.Bb5 Kf7 20.Bd7+–) 1–0. guest6377 – guest6786, ICC, 2005.

6.d4 ed4 7.ed4 d5 (7...Qe7 8.Be2 d5+= 9.c5 Be6 10.0–0+=) 8.Nc3 Ne7 9.cd5 Nd5 10.Bb5 =.

6.d4 e4 7.Nfd2 c5 8.a3 Nc6 9.Ra2 cd4 10.ed4=.

6.d4 e4 7.Nfd2 c6 8.Nc3 Ne7 9.Nb3 (9.Qh5 g6 10.Qd1 0–0 11.Be2 d5 12.0–0 f4 13.Qb3 Kh8 14.cd5 cd5+=) 9...Nd7 (9...0–0 A) 10.a3 Be6 11.Be2 Nd7 12.0–0 d5 13.c5 Qc7 14.b5 f4=; B) 10.Be2 Nd7 (10...Be6 11.0–0 Nd7 12.f3 Nb6 13.Na5 ef3 14.Rf3 Qd7=) 11.c5 d5 12.0–0 Qc7 13.b5 Bg5 14.bc6 bc6=) 10.a4 (10.Be2 Nb6 (10...0–0 11.0–0 Nb6 12.Nd2 Be6 13.Qb3 Qc7 14.a4 a5=) 11.Na5 0–0 12.0–0 Qc7 13.f3 Bg5 14.Qd2 ef3=; 10.Qh5 g6 11.Qh6 d5 12.b5 Nb6 13.c5 Nd7 14.Be2 Nf8+=) 10...0–0 (10...d5 11.cd5 Nd5 12.Nd5 cd5 13.Be2 0–0 14.0–0 Bg5=) 11.Be2 g6 (11...d5 12.0–0 (12.cd5 Nd5 13.Nd5 cd5 14.0–0= Bg5=) 12...Qc7 13.Nd2 Qd6 14.Qb3 Kh8+=) 12.Qc2 (12.0–0 d5 13.a5 Qe8 14.b5 Qf7+=) 12...Bg7 (12...d5 13.0–0 f4 14.ef4 Nb6+=) 13.d5 (13.0–0 d5+= (13...Nf6 14.a5 Be6+=) 14.cd5 cd5+=) 13...Ne5 (13...cd5 14.cd5 Be5=) 14.Rd1 (14.Qd2 b6=) 14...f4 (14...cd5 15.cd5 Bd7 16.Nd4=) 15.Ne4 (15.Qe4 Bf5 16.Qf4 Bc2–+) 15...fe3 16.fe3 Nf5 17.Bc1 Nh4 18.dc6? (better is 18.Rg1 Bf5 19.Nbd2+=) 18...Ng2–+ 19.Kd2 d5 (19...bc6?! 20.Rhg1 d5 21.Rg2 de4 22.Nd4–/+) 20.cd5 (20.c7 Qe7 21.Nbc5 de4 22.Qe4–+) 20...Qd5 21.Nd4 Ne3 (21...Nc6?? 22.Bc4 Nb4 23.Bd5 Nd5 24.Qb3+–) 22.Qb3 N5c4 23.Kc3 Qe4 24.Bc4 Nc4 25.Qc4 Be6 26.Qc5 (26.Rhe1 Rf3 27.Kb2 Rf2 28.Ka1 Bd4 29.Rd4 Qe1 30.cb7–+) 26...Rf3 27.Kb2 Rb3 0–1. Gerold – Schmidt, corr JBDDR'2382 DDR, 1981.

4.c4 Bf5

5.b5 Nf6 6.Nc3 +=.

5.b5 Nh6 6.Nc3 Nd7 7.Nf3 c6 (7...0–0 8.d4=) 8.a4 (8.e4 Bg4=) 8...a6 (8...Bf6 9.e4 Be6 10.Be2=) 9.Be2 0–0 10.0–0 Bg6 (10...Nf6 11.d4=) 11.d4+= f5 (11...Bf6 12.Bd3+=) 12.d5 (12.Qc2 Ng4+=) 12...c5 13.h3 (13.Qb3 Qa5=) 13...e4 14.Nd2 Bg5 (14...Bf6 15.Qc2=) 15.Qb3 (15.a5 ab5 16.Nb5 Nf6+=) 15...Nf7 (15...Qe7 16.Qc2=) 16.Nd1 (16.ba6 ba6 17.Qc2 Rb8=) 16...Nfe5 17.f4 (17.Qc2 Bf6=) 17...ef3 18.Nf3 Nf3 19.Bf3 Qe7 (19...Ne5 20.Be2=) 20.Ra3 (20.a5 Ne5=) 20...Ne5+= 21.Be2 f4 22.ef4 Bf4 (22...Rf4 23.Rf4 Bf4 24.Qc3+=) 23.Be5 (23.Nf2!?+=) 23...Be5 24.Qa2 (24.Bf3 Qh4 25.Nf2 Qf4–/+) 24...Qg5 (24...Bd4 25.Nf2 Rf2 26.Rf2 Rf8–+ (26...Bf2?! 27.Kf2 Qe5 28.ba6 Qd4 29.Kg3 ba6 30.Rb3–/+)) 25.Bg4?? (better is 25.Nf2–/+) 25...Bd4–+ 26.Nf2 Bf2 (better is 26...Rf2!? 27.Rf2 Qc1 28.Kh2 Bf2 29.Qf2 Qa3 30.ba6 ba6 31.Bd7–+) 27.Rf2 (27.Kh1 Bd4 28.Qe2 Be4 29.ba6 Rf1 30.Qf1 ba6–+) 27...Qc1 (27...Qc1 28.Bd1 Qd1 29.Kh2 Rf2 30.Qf2 ab5 31.cb5 Qd5–+) 0–1. Gerold,Guenter – Rathmann,Hans, corr, 1973.

5.Nc3 c6 6.Be2 Nf6 7.Nf3 Nbd7 (7...Qb6 8.a3=) 8.0–0 Ng4 (8...0–0 9.d4=) 9.d4 Bf6 (9...0–0 10.e4 Bg6 11.Ne5 de5 12.Bg4 ed4 13.Qd4+=) 10.d5 0–0 (10...Qb6 11.dc6 bc6 12.a3+/–) 11.h3 (better is 11.e4 Bg6 12.dc6 bc6 13.Qd6+–) 11...e4? (11...Nh6 12.e4 Bg6 13.dc6 bc6 14.Qd6+–) 12.Nd4 (12.hg4 ef3 13.Bf3 Bg6 14.dc6 bc6 15.Bc6 Rc8+–) 12...Nh6 (12...Bd4!? 13.hg4 Bc3 14.Bc3 Bg6 15.dc6 bc6 16.Qd6 Qc8+–) 13.dc6+– bc6 14.Nc6 Qe8 (14...Qc7 15.Nd5 Qc6 16.Bf6+–) 15.Qd6 (better is 15.Nd5 Bb2 16.Nc7 Ba1 17.Ne8 Rfe8 18.Qa1+–) 15...Qc8? (15...Be6+–) 16.Nd5 a6 (16...Bb2 17.Nde7 Kh8 18.Nc8 Ba1+–) 17.Nce7 (17.Nce7 Kh8 18.Nc8 Bb2 19.Ncb6 Nb6 20.Qb6 Ba1 21.Ra1+–; 17.Nf6 Kh8 18.Ne7 Qb8+–) 1–0. Eralos – Naseby, ChessWorld.net, 2002.

5.Nc3 e4 6.g4 Bg6 7.Nge2 Bg5 (better is 7...a5!? 8.Bg2 Bf6=) 8.Bg2+/– Nf6 (8...Qd7!?+/–) 9.h4+– Ng4 10.hg5 0–0? (better is 10...Ne5 11.Nf4 Nc4+–) 11.Nf4 Qg5 (11...Ne5 12.Ne4 Nbc6 13.b5+–) 12.Ne4 (worse is 12.Ng6 fg6 13.Ne4 Qf5+–) 12...Qf5 13.Ng3 (worse is 13.Ng6 Qg6 14.Nd6 cd6 15.Bb7 Nd7 16.Ba8 Ra8+–) 13...Qc2 (13...Qc8 14.Ng6 hg6 15.Bb7 Qb7 16.Qg4+–) 14.Qg4 (14.Qc2 Bc2 15.Bb7 Nd7 16.Ba8 Ra8+–) 14...Qb2 15.Ng6 fg6 (15...hg6 16.Bb7 Nd7+–) 16.Bd5 Kh8 17.Rh7! Kh7 18.Qh4 1–0. pcmvr – naskme (2050), net–chess.com, 2012.

5.Nc3 Ne7 6.Nd5 Nd5 7.cd5 Bf5 8.Ne2 e4 9.Nd4 Bd7 (9...0–0!?=) 10.Qc2+= 0–0 11.Rc1 Na6 12.Ba6 ba6 13.Qc7 Qc7 14.Rc7 Bb5 (better is 14...Bd4!? 15.Bd4 Rfc8+/–) 15.Nb5+– ab5 16.Bf6 gf6 17.Ke2 Rfc8 18.Rhc1 Rc7 19.Rc7 Kf8 (19...a5!?+/–) 20.a3+– Ke8 21.Rb7 a6 22.g4 h6 23.f3 a5 (23...ef3 24.Kf3 Rc8 25.Rb6+–) 24.fe4 ab4 25.ab4 Rc8 (25...Ra1 26.Rb5 Rh1 27.Rb8 Kd7 28.Rb7 Ke8 29.Kd3 Rh2 30.b5+–) 26.h3 Rc4 27.Rb5 Re4 28.Rb8 Kd7 29.d4 f5 30.gf5 Rh4 31.Rb7 Ke8 32.f6 Rh3 33.Rb8 Kd7 34.b5 Rh2 35.Kd3 Rf2 (35...Rb2 36.Rb7 Ke8 37.b6+–) 36.b6 Rf6 (36...Rb2 37.Rb7 Kd8 38.Rf7 Rb6 39.Rf8 Kd7 40.Rh8+–) 37.Ra8 Rf2 38.b7 Rb2 39.b8Q Rb8 40.Rb8 Ke7 41.Rh8 f5 42.Rh6 Kd7 1–0. Fournier,Frederic (2160) – ruddi(C), Active, 2006.

5.Nc3 Nf6 6.Nf3 0–0 7.Be2 Nbd7 8.d4 ed4 9.Nd4 Bg6 10.0–0 c5 11.bc5 dc5 12.Nf3 Ne4 13.Nd5 Bf6 14.Rb1 (14.Qb3 Bb2 15.Qb2 b6+=) 14...Bb2= 15.Rb2 b6 16.Qb3 Re8 17.Nd2 Nd2 18.Rd2 Qc8 (18...Be4 19.Rfd1 Qg5 20.g3+=) 19.Rfd1 Qc6 (19...Ne5 20.a4+=) 20.Nc3 Nf6 21.Bf3 Ne4 22.Rd6 Qc8? (better is 22...Qb7+/–) 23.Rg6!+– Nc3 (23...fg6 24.Ne4 Remove defender; 23...hg6 24.Ne4 Remove defender) 24.Rc6 (24.Rc6 Nd1 25.Rc8 Rac8 26.Qd1+–; 24.Qc3?! hg6 (24...fg6?? 25.Ba8 Kh8 26.Bf3+–) 25.Ba8 Qa8+=) 1–0. pcmvr (2870) – shazan (2145), net–chess.com, 2009.

5.Nc3 Nf6 6.Nf3 0–0 7.Nh4 Be6 8.Nf3 Nc6 9.b5 Nb4?? (better is 9...Na5 10.c5 Re8+=) 10.e4+/– a5 (10...a6 11.a3 ab5 12.cb5+/–) 11.a3+– c5 12.Be2 Nd7 13.0–0 Nb6 14.ab4 ab4 15.Nd5 Ra1 16.Qa1 (16.Ne7?! Qe7 17.Ba1 Bc4 18.Bc4 Nc4+/–) 16...f5 17.Nb6 (17.Ne7?! Qe7 18.d3 fe4 19.de4 Nc4+/–) 17...Qb6 18.ef5 (18.d3 Qd8+–) 18...Bf5 19.d3 g6 20.Nd2 Bg5 21.Ne4 Be4 (21...Bf4 22.Bf3+–) 22.de4 Qc7 23.Qd1 Qf7 (23...Kg7+–) 24.Qd6 Bf4 (24...Be7 25.Qc7+–) 25.Qc5 Qf6 (25...b3 26.Rb1+–) 26.g3 Bd2 (26...Bh6+–) 27.Qd5 Rf7 28.Qd2 1–0. usingprogram (1965) – grigorcho, internet, 2012.

5.Nc3 Nf6 6.Nf3 Ne4 7.Ne4 Be4 8.d3 Bg6 9.Be2 0–0 10.0–0 a5 11.b5 Nd7 12.d4 e4 13.Nd2 c6 14.a4 d5 15.f4 Bf5? (better is 15...ef3 16.Bf3 Nf6=) 16.g4+– g6 (16...cb5 17.ab5 Bg4 18.Bg4 Bb4+–) 17.gf5 gf5 18.Rf2 Kh8 19.Nf1 Rg8 20.Rg2 Rg2 21.Kg2 Qg8 22.Ng3 Nf6 23.c5 Ng4 24.Bg4 fg4 25.Bc3 h5 26.Nh5 Qg6 27.Ng3 Kg7 28.Ra2 f5 (28...Bh4 29.Rb2+–) 29.bc6 bc6 30.Qb3 Qh6 (30...Qe6 31.Qb7 Rf8+–) 31.Nf5 (31.Nf5 Kh7 32.Nh6 Kh6 33.Qb7+–) 1–0. combijack (1770) – yshklarsh (1615), gameknot.com, 2012.

5.d4 ed4–/+ 6.ed4 d5 7.c5 Nf6 8.Nf3 0–0 9.Bd3 Bd3 (9...Ne4 10.0–0=) 10.Qd3= Re8 (10...Nh5 11.Nc3 Nc6 12.0–0 Nb4 13.Qb5+=) 11.0–0+= Nc6 12.b5 Na5 13.Nbd2 Ne4 14.Bc3 c6 (14...Nc3 15.Qc3 c6 16.a4=) 15.Ne5 (better is 15.Ne4!? de4 16.Qe4 Bc5 17.Qf5+/–) 15...Nc3= 16.Qc3 cb5 17.Rfb1 a6 18.a4 f6 (18...Nc6!? 19.ab5 ab5 20.Rb5 Ra1 21.Qa1 Ne5 22.de5 Qc7=) 19.Nef3+= Nc4 20.ab5 Nd2 (20...ab5!? 21.Ra8 Qa8 22.Rb5 Qa6+=) 21.Nd2+/– a5 22.b6 a4 23.Rb4 Qd7 24.Qd3 1–0. Kamaletdinov,Farit (1950) – Ektova,Elena (1810), Astrakhan RUS, Open, 2012.

5.d4 e4 =.

5.Nf3 Nd7 6.Nc3 Ngf6 7.d3 0–0 8.Be2 c6 (8...d5 9.cd5 Bb4 10.Qb3=) 9.0–0 Qc7 (9...d5 10.Qb3 a5 11.a3 dc4 12.dc4= (worse is 12.Qc4 Be6 13.Qh4 Ne4 14.Qe4 f5+=)) 10.Qc2 (10.e4 Bg4=) 10...Ng4 (10...d5 11.Qb3=) 11.b5 (11.e4 Bg6=) 11...Nc5 (11...Nb6 12.a4=) 12.e4 Be6 13.Na4 (13.d4 ed4 14.Nd4 Nf6=) 13...cb5 14.cb5 (14.Nc5 A) worse is 14...dc5 15.h3+= (worse is 15.cb5 Bd6=); B) 14...Qc5 15.d4 Qc7+=) 14...Rac8+= 15.Nc5 Qc5 (worse is 15...dc5 16.h3 Nf6 17.Be5+/–) 16.Qc5 Rc5 17.Rac1 (17.Rfb1!?+=) 17...d5 (better is 17...Rfc8 18.Rfd1 Rb5 (worse is 18...Ba2 19.Rc5 Rc5 20.d4=) 19.Rc8 Bc8+=) 18.Ne5 1–0. Goldmund,Heike – Kitzig,Tobias, FICGS, 2014.

5.Nf3 Nf6 6.Be2 Nbd7 7.Nc3 0–0 8.Nh4 Be6 9.0–0 Nb6 10.d3 h6 11.Nf3 Bg4 12.a4 a6 13.a5 Nbd7 14.h3 Bh5 15.Qb3 c5 16.b5 ab5 17.Qb5 Ne8 18.Nd5 Nc7 19.Nc7 Qc7 20.e4 Nb8 21.Bc3 Nc6 22.Rfb1 Bf3 23.Bf3 Nd4 24.Bd4 cd4 25.Qb7 Qb7 26.Rb7 Bg5 27.a6 Rfb8 28.Rd7 Bf4 29.g3 Bd2 30.Rd6 Bc3 31.Ra2 Bb4 32.Rd7 Bc5 33.Rd5 Ba7 34.Re5 Rb6 35.Re7 Rb3 36.e5 Rd3 37.Ba8 Bc5 38.Re8 Kh7 39.Be4 1–0. Gross – Dreyer, 1986.

5.f4 Nd7 6.Nf3 Bf6 7.fe5 Ne5 8.Be5 (8.d4 Ng4 9.Qd2 Qe7+=) 8...de5–/+ (8...Be5?! 9.d4 Bf6 10.Bd3 Bd3 11.Qd3 Bh4 12.g3+=) 9.Be2 (9.d4 ed4 10.Nd4 Bh4 11.g3 Be4–/+) 9...Ne7 10.0–0 (10.Nc3 e4 11.Ng1–+) 10...0–0?? (better is 10...e4 11.Nc3 ef3 12.Bf3 a5–+) 11.Nc3 Nc6 (better is 11...e4!? 12.Ne1 a5–/+) 12.b5 Nb4 (12...Ne7!? 13.d4 ed4 14.Nd4 Qe8=) 13.a3 Nd3 14.Ne5 Ne5 (14...Be4! 15.Nd3 Bd3 16.Bd3 Qd3 17.Rf6 gf6 18.Qg4 Kh8+=) 15.Rf5+/– Qe7? (better is 15...Qd7 16.Qc2 Ng6+/–) 16.Nd5+– Qd6 17.Nf6 gf6 18.d4 Ng6 19.Qf1 White prepares c5 19...Kg7 20.Qf2 Ne7 21.Rf3 Rg8 22.c5 Qe6 23.Rg3 (23.Qg3 Kh8 24.Qc7 Ng6+–) 23...Kh8 (23...Kf8 24.Rg8 Kg8 25.Bf3+–) 24.Bf3 (better is 24.Bc4! Qf5 25.Rf3+– (25.Bf7?! Qf2 26.Kf2 Rg3 27.Kg3 a6+–)) 24...Rg3 25.Qg3 Qe3 26.Qf2 Qc3 (26...Qf2 27.Kf2 Rd8+–) 27.Re1 Nf5 28.Bb7 Rg8 (28...Rb8 29.Be4 Re8 30.g4+–) 29.Bd5 (better is 29.Re4 Qc1 30.Qf1 Qg5+–) 29...Rg7? (better is 29...Kg7 30.a4 Nd4+–) 30.Re8 (30.Qf5?! Qe1 31.Qf1 Qf1 32.Kf1 Rg4+=) 30...Rg8 31.Rg8 (31.Qf5?! Qd4 32.Qf2 Qf2 (32...Re8?? 33.Qd4 Re1 34.Kf2+–) 33.Kf2 Re8+=) 31...Kg8 32.Bf7! Kf7 33.Qf5 Qd4 34.Qf2 (better is 34.Kf1!? Kg7 35.c6 Qa1 36.Kf2 Qb2 37.Kg3 Qa3 38.Kg4+/–) 34...Qa1= 35.Qf1 Qa3 (better is 35...Qd4!? 36.Kh1 Qc5=) 36.c6 Qc5 ½–½. Hal1958 – Wernswig, playchess.de, 2005.

5.g4!? Be6 6.Nc3 =.

4.c4 Bf6

5.Nc3 a5 6.Qa4 Nd7 7.Ne4 Be7 8.d4 Ngf6 9.Nf6 Bf6 10.de5 =.

5.Nc3 a5 6.b5 Nh6 (6...Nd7 7.Nf3 Ne7 8.d4 ed4 9.ed4 d5 10.c5=; 6...Be6 7.Nf3 Nh6 8.d4 ed4 9.Nd4 Nd7 10.Qc2+=; 6...Ne7 7.Ne4 Nd7 8.Nf3 Ng6 9.Be2 0–0 10.0–0+=; 6...Bf5 7.Qf3 Qc8 8.e4 Be6 9.Rb1 Nd7 10.Be2=) 7.Nf3 e4 8.Nd4 Bd4 9.ed4 0–0 10.d3=.

5.Nc3 c6 6.Nf3 e4 7.Nd4 c5 8.bc5 dc5 9.Nb3 Na6 10.d4 +=.

5.Nc3 c6 6.Nf3 Ne7 7.d4 ed4 (7...Bf5 8.Bd3+/–) 8.ed4 (better is 8.Ne4!? c5 9.Nf6 gf6 10.bc5 dc5 11.ed4+/–) 8...0–0+= 9.Be2 Bg4 10.0–0 Re8 11.Ne4 (11.h3!? Be6 12.Ne4+/–) 11...Ng6= 12.Nfd2 Be2 13.Qe2 Nd7 14.Qg4 Nb6 15.f4? (better is 15.Rae1!?=) 15...Na4–/+ 16.f5 Nb2 17.Nf6 Qf6 18.fg6 Qg6 19.Qf3 Nd3 20.b5 Nb4 (20...cb5 21.Rab1 b4 22.Rb3–/+) 21.Rae1 d5 (21...Nc2!? 22.Re4 Re4 23.Qe4 Qe4 24.Ne4 d5–/+) 22.a3? (better is 22.cd5 Nd5 23.Nc4+=) 22…Nc2–+ (22...Nc2 23.Re8 Re8 24.bc6 bc6–+) 0–1. Dorozhkin,Oleg – Orekhov,Boris (1880), Anna RUS, Akulov Mem, 2012.

5.Nc3 c6 6.Nf3 Bg4 7.h3 Bh5 8.g4 Bg6 9.h4 h6 10.e4 =.

5.Nc3 Nc6 6.b5 Nce7 7.Ne4 Bf5 8.Bd3 a6 9.ba6 Ra6 10.Nf3 =.

5.Nc3 Nd7 A) 6.Nf3 a5 (6...Nh6 7.Nd5 a5 8.a3 e4 9.Nf6 Nf6 10.Ng5=; 6...Ne7 7.Ne4 0–0 8.c5 dc5 9.bc5 Ng6 10.h4=) 7.Qa4 Ne7 8.Ne4 0–0 9.c5 Nd5 10.a3=; B) 6.a3 a5 (6...Ne7 7.Ne4 0–0 8.Nf3 Ng6 9.Be2 Be7 10.0–0=; 6...Nh6 7.Nf3 a5 8.Ne4 Be7 9.Be2 f5 10.Nc3=) 7.Nf3 Nh6 8.Ne4 Be7 9.Be2 ab4 10.ab4=.

5.Nc3 Ne7 6.a4 Be6 7.Nf3 ½–½. mr5reasons1 (1645) – timepilot (1615), gameknot.com, 2012.

5.Nc3 Ne7 6.Nd5 Nd5 7.cd5 Bf5 8.Ne2 e4 9.Nd4 Bd7 (9...0–0!?=) 10.Qc2+= 0–0 11.Rc1 Na6 12.Ba6 ba6 13.Qc7 Qc7 14.Rc7 Bb5 (better is 14...Bd4!? 15.Bd4 Rfc8+/–) 15.Nb5+– ab5 16.Bf6 gf6 17.Ke2 Rfc8 18.Rhc1 Rc7 19.Rc7 Kf8 (19...a5!?+/–) 20.a3+– Ke8 21.Rb7 a6 22.g4 h6 23.f3 a5 (23...ef3 24.Kf3 Rc8 25.Rb6+–) 24.fe4 ab4 25.ab4 Rc8 (25...Ra1 26.Rb5 Rh1 27.Rb8 Kd7 28.Rb7 Ke8 29.Kd3 Rh2 30.b5+–) 26.h3 Rc4 27.Rb5 Re4 28.Rb8 Kd7 29.d4 f5 30.gf5 Rh4 31.Rb7 Ke8 32.f6 Rh3 33.Rb8 Kd7 34.b5 Rh2 35.Kd3 Rf2 (35...Rb2 36.Rb7 Ke8 37.b6+–) 36.b6 Rf6 (36...Rb2 37.Rb7 Kd8 38.Rf7 Rb6 39.Rf8 Kd7 40.Rh8+–) 37.Ra8 Rf2 38.b7 Rb2 39.b8Q Rb8 40.Rb8 Ke7 41.Rh8 f5 42.Rh6 Kd7 1–0. Fournier,Frederic (2160) – ruddi(C), Active, 2006.

5.Nc3 Bf5 6.e4 (6.Qf3 Qc8 7.e4 Be6 8.Nd5 Qd8 9.a3 Nd7 10.Be2=; 6.Nf3 e4 7.Nd4 Bd4 8.ed4 Nf6 9.d3 0–0 10.de4=) 6...Bg6 (6...Be6 7.Nf3 Nc6 8.Nd5 Bg4 9.Be2 Bf3 10.Bf3+=) 7.Nf3 Ne7 8.Bd3 0–0 9.0–0 a5 10.b5=.

5.Nc3 Nh6 A) 6.a3 0–0 (6...a5 7.Nd5 Nd7 8.Nf3 e4 9.Nf6 Nf6 10.Ng5=; 6...Nc6 7.b5 Nb8 8.Nf3 Bg4 9.Be2 Nd7 10.d4=; 6...Be6 7.Nf3 0–0 8.d4 ed4 9.Nd4 Bg4 10.Be2=; 6...Bf5 7.e4 Be6 8.Nf3 Nc6 9.Nd5 0–0 10.Be2=; 6...Nf5 7.Ne4 Be7 8.Nf3 a5 9.b5 c6 10.Qc2=) 7.Bd3 Be7 8.Nge2 f5 9.0–0 Be6 10.f4=; B) 6.Nd5 0–0 (6...Nd7 7.d4 ed4 8.Nf6 Nf6 9.Qd4 a5 10.b5=; 6...a5 7.Qa4 Nd7 8.c5 0–0 9.Rc1 Nf5 10.cd6=) 7.d4 Bf5 8.Nf3 Nd7 9.Nf6 Qf6 10.Qd2 C) 6.Bd3 a5 7.Qa4 Nd7 8.Nf3 c6 9.0–0 Nb6 10.Qb3=; D) 6.Be2 0–0 (6...a5 7.b5 0–0 8.Nf3 e4 9.Nd4 Re8 10.0–0=) 7.Nd5 a5 8.b5 c6 9.Nf6 Qf6 10.Nf3=; E) 6.Ne4 0–0 (6...Be7 7.d4 d5 8.Nc3 dc4 9.de5 Be6 10.Qd8=) 7.d4 ed4 8.Nf6 Qf6 9.Qd4 Qd4 10.Bd4=.

5.d4 ed4 6.ed4 Qe7 7.Be2 Bg4 (7...Be6 8.Qb3+=) 8.Qd3 (8.Nc3 c6=) 8...Be2 (8...Na6 9.a3=) 9.Ne2 (worse is 9.Qe2 Nc6–/+) 9...c6 (9...d5 10.a3=) 10.0–0+= Na6 (10...d5 11.cd5 Qb4 12.Ba3+=) 11.a3 0–0–0 (11...Qd7 12.Nbc3+/–) 12.Nbc3 Re8 13.Rfe1 Nh6 14.h3 (14.b5 Nc7+/–) 14...Nc7 15.Kf1 (15.d5 cd5 16.cd5 Kd8+/–) 15...g6 (15...Qd7 16.Ne4 Qe7 17.N2c3+=) 16.Ng3 Qd7 17.a4 White prepares b5 (17.d5 Be5+/–) 17...Ng8 (17...d5!? 18.cd5 Nd5 19.Nd5 Qd5+=) 18.Re8+/– Ne8 19.b5 Ne7 20.Ba3 Bh4 21.Re1 Bg3 22.Qg3 Nf5 23.Qf4 h6 24.g4 (24.bc6 bc6 25.d5 Kd8+/–) 24...Nh4 (better is 24...Nfg7!?+/–) 25.Ne4+– g5 26.Qg3 (26.Nd6 Nd6 27.Qd6 Qd6 28.Bd6 Rd8+/–) 26...f5 27.Nd6 Nd6 28.Qd6 Qd6 (28...Rd8 29.Qd7 Rd7 30.bc6 Rd4 31.gf5 Nf5 32.Re5+/–) 29.Bd6 Nf3 30.Rd1 Rd8 31.Ke2 fg4 32.hg4 Nh2?? (better is 32...Ng1 33.Rg1 Rd6+–) 33.Bh2 Re8 34.Be5 c5 35.Kd3 cd4 36.Bd4 Rd8 37.Re1 1–0. katchum (2480) – eduardobandeira (2100), net–chess.com, 2004.

5.d4 Ne7 6.de5+= Be5 (6...de5 7.Qd8 Kd8 8.Nf3 Be6 9.Nbd2 Nbc6 10.a3 Ng6 11.Ne4 Kc8+/–) 7.Be5 de5 8.Qd8 Kd8 9.Nf3 (9.Nc3 Be6 10.Nf3 f6 11.Bd3 Kc8+=) 9...Ng6 (9...f6 10.Nc3 Ke8 11.Bd3 Kf7+=) 10.Nc3 Be6 (10...Bf5 11.Ng5 Kc8+/–) 11.h4 (11.Ng5 Nd7+/–) 11...f6 (11...Kc8+/–) 12.h5 Ne7 13.0–0–0 Nd7 14.Ne4 h6? (better is 14...Ke8!?+=) 15.Nc5+– Bg4 (15...Bf5 16.g4 (16.Nb7?! Kc8 17.Nh4 Bg4+/–) 16...Bg4 17.Rg1+–) 16.Rh4 (16.Nb7?! Kc8 17.Rh4 Bf3 18.gf3 Rb8+/–) 16...Bf3?? (16...Bf5 17.g4 b6 18.Nb7 Ke8 19.gf5 Rb8+–) 17.gf3 (17.Rd7?! Ke8 18.gf3 b6 19.Rc7 bc5 20.Rc5 Kf7+–) 17...Ke8 18.Nd7 (18.Rd7?! b6 19.Rc7 bc5 20.Rc5 Kf7+–) 18...g5 (18...Rd8 19.Bh3 Kf7 20.Kc2+–) 19.hg6 Ng6 20.Rg4 (20.Nf6?! Kf7 21.Rd7 Kf6+–) 20...Ne7 (20...Kf7 21.Bd3 Rag8+–) 21.Nf6 Kf7 22.Nd7 Rad8 (22...Rhd8 23.Ne5 Kf8 24.Rf4 Ke8 25.Bd3+–) 23.Ne5 Kf6 (23...Ke6 24.Nd7! Rhg8 25.Bh3+–) 24.Nd7 Kf7 25.Rf4 Ke6 (25...Kg7 26.Bh3 Rhg8+–) 26.Rf6 1–0. oliver – game7, internet, 2011.

5.d4 Nh6 6.de5+= de5 (6...Be5 7.Be5 de5 8.Qd8 Kd8 9.Nc3 Be6 10.Nf3 a5 11.b5 Nd7) 7.Qd8 Bd8 (7...Kd8 8.Nc3 Nd7 9.0–0–0 Be7 10.Nd5 Bf8 11.Nf3 c6) 8.Nc3 Bf6? (better is 8...Be6!?+= 9.Nf3 Nd7 10.Ne4 Be7 11.c5 f6; 8...Nc6 9.Nd5 Be6 10.b5 Na5 11.Be5 f6) 9.Nd5+– Bd8 (9...Kd8!? 10.Nf3+–) 10.Be5 f6 (10...0–0 11.Bc7 (11.Nc7?! Bc7 12.Bc7 Na6+/–) 11...Nc6 12.b5+–) 11.Bc7 (11.Nc7?! Bc7 12.Bc7 Na6+/–) 11...Nc6 12.Bd8 Kd8 13.Rd1 Bg4 14.Nf3 Nf5 (14...Bd7+–) 15.Nf6 Ke7 (15...Kc7 16.Ng4 Nb4 17.a3+–) 16.Ng4 h5 (16...Rhf8 17.Nge5+–) 17.Nge5 Ne5 18.Ne5 Kf6 19.Nd7 Kg5 (19...Ke7 20.c5+–) 20.Rd5 Rhd8 (20...g6 21.Bd3 Rhe8 22.Ne5+–) 21.Bd3 g6 22.e4 Kf4 23.ef5 gf5 24.Rf5 Kg4 25.h3 Kh4 26.g3 1–0. hother – conne, internet, 2011.

5.Be2 Nc6 6.b5 e4 7.Bf6 Qf6 8.Nc3 Qg6 9.Ne4 Qe4 10.Bf3 Qc4 =.

5.Be2 e4 6.Nc3 Nc6 7.Qb3 Bf5 8.f3 Bh4 9.g3 ef3 10.Nf3 Bf6 +=.

5.Be2 Ne7 6.Nc3 A) 6...a5 7.b5 0–0 8.Ne4 Nd7 9.Nf3 Nf5 10.0–0 Re8=; B) 6...Nd7 7.Ne4 Ng6 8.Nf3 a5 9.b5 0–0 10.0–0 Be7=; C) 6...d5 7.Qa4 (7.Nd5 Nd5 8.cd5 Qd5 9.Nf3 0–0 10.Qc2 Qd6=; 7.d3 0–0 8.Nf3 Be6 9.0–0 Nd7 10.cd5 Nd5=; 7.cd5 Nd5 8.Nd5 Qd5 9.Nf3 0–0 10.Qc2 Qd6=) 7...Bd7 8.b5 c6 9.cd5 cd5 10.Nf3 Be6=; D) 6...0–0 7.d3 (7.Ne4 Ng6 8.d4 Be7 9.Nf3 d5 10.cd5 Qd5) 7...a6 8.Nf3 d5 9.0–0 Nbc6 10.a3 d4=.

5.Be2 Bf5 6.Nc3 A) 6...Ne7 7.e4 Be6 8.Nf3 0–0 9.0–0 a5 10.b5 Nd7=; B) 6...e4 7.Qa4 (7.f3 Bc3 8.Bc3 Nf6 9.g4 ef3 10.gf5 fe2=) 7...Qd7 8.Qd7 Nd7 9.f3 Bh4 10.g3 Bf6=; C) 6...a5 7.ba5 (7.Qa4 Nd7 8.e4 Be6 9.Nf3 ab4 10.Qb4 Nc5+=; 7.b5 Ne7 8.e4 Be6 9.Nf3 Nd7 10.Nd5 0–0=) 7...Nc6 8.e4 Be6 9.Nf3 Nh6 10.Nd5 Ra5=.

5.Be2 Nh6 6.Nc3 a5 (6...0–0 7.d3 Be6 8.Nf3 Nd7 9.0–0 Re8 10.d4 a5=) 7.b5 0–0 8.Nf3 e4 9.Nd4 Bd4 10.ed4 Qg5 =.

5.Be2 Nh6 6.d4 =.

5.e4 Nc6 6.a3+= (6.b5 Nd4 7.Nf3 Bg4 8.Be2 Ne2 9.Qe2 a6 10.0–0=) 6...a5 (6...Nd4 7.Nf3 Be6 8.Nd4 ed4 9.Bd3 Be5 10.0–0=; 6...Be6 7.Nf3 Nd4 8.Nd4 ed4 9.Bd3 Be5 10.0–0=) 7.b5 Nd4 8.Nf3 Bg4 9.Be2 Ne2 10.Qe2=.

5.e4 Ne7 6.Nf3 Nbc6 (6...Qd7 7.a3 0–0 8.Nc3 Nbc6 9.Be2 Nd4 10.0–0=; 6...Nec6 7.a3 0–0 8.Be2 Nd4 9.Nd4 ed4 10.d3=) 7.b5 Nd4 8.Nd4 ed4 9.Bd3 Ng6 10.0–0 +=.

5.e4 Nh6 6.Nf3 Nc6 (6...a5 7.b5 0–0 8.Be2 Bg4 9.0–0 Nd7 10.h3=; 6...c5 7.bc5 dc5 8.Be2 Nd7 9.Nc3 Qe7 10.0–0=; 6...0–0 7.Be2 Nc6 8.a3 Nd4 9.0–0 Nf3 10.Bf3=) 7.a3 0–0 8.Be2 Nd4 9.0–0 Nf3 10.Bf3 =.

5.Nf3 b6 6.b5 a5 7.Nc3 (7.d4 ed4 8.ed4+=) 7...Bf5 (7...Nd7!?+=) 8.Ne5!+/– Be5 (8...de5 9.Qf3 Combination; 8...Be5 9.Qf3 Combination) 9.Qf3+– Bg6? (better is 9...c6 10.Qf5 Ne7+–) 10.Qa8 Nf6 (10...Bc3 11.Bc3 f6+–) 11.d4 Bd4 12.ed4 Qe7 13.Be2 0–0 14.0–0 Nbd7 (14...d5 15.a3+–) 15.Qc6 Ne4 (15...Qd8 16.Rfe1+–) 16.Nd5 Qe6 (16...Qd8 17.Nc7 Bf5 18.Rad1+–) 17.Rfe1 Ndf6 (17...Rc8 18.Bd3 f5 19.f3+–) 18.f3 Nd5 19.cd5 Qf5 (19...Qc8 20.fe4 Be4 21.Rac1+–) 20.Bd3 Qf4 (20...Qg5 21.fe4 Qd2 22.Bc2+–) 21.Be4 Be4 (21...f5 22.Bc2+–) 22.Re4 Qd2 23.Bc3 Qa2 (23...Qd3+–) 24.Ra2 Ra8 25.Qa8 1–0. Janek – Vilsta, internet, 2017.

5.Nf3 b6 6.b5 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 Ne7 10.Nc3 0–0 11.Be2 Be6 12.0–0 Nd7 13.d4 ed4 14.Nd4 Bd4 15.ed4 Nf6 16.Bb2 Qd7 17.Qc2 Bf5 18.Bd3 Bd3 19.Qd3 Qf5 (19...d5 20.c5=) 20.Qd2 Ne4?? (better is 20...Ng6+=) 21.Ne4+– Qe4 (21...d5 22.Ba3 de4 23.Be7+–) 22.Re1 Qf5 23.Re7 Qb1 24.Bc1 Qg6 (24...d5 25.Qc3+– (worse is 25.cd5 Qb5 26.Rc7 Qd5+–)) 25.Qe3 (25.Rc7!? Qe4+–) 25...Qb1 (25...Qc2+–) 26.h3 g6 (26...d5 27.Qc3+– (worse is 27.Rc7 dc4 28.Qf4 h6+–)) 27.Kh2 Rc8 28.Re8 (better is 28.Qf3!? Qf5 29.Qc6 h5 30.Rc7 Rc7 31.Qc7 Qf2 32.Qd6 Qf1+–) 28...Re8 29.Qe8 Kg7 30.Qe3 (better is 30.Be3 Qa2 31.Qc6+–) 30...Kh8 (30...h5 31.d5 Qa1 32.Bd2 Qe5 33.Qe5 de5 34.c5+–) 31.Qh6 (better is 31.Qe7 Kg7 32.Be3 h5+–) 31...f5 (31...Kg8 32.Bg5 Qf5+–) 32.Qf8 1–0. GuestFTPC – tleylan, freechess.org, 2017.

5.Nf3 b6 6.b5 a6 7.d4 ed4 8.Nd4=.

5.Nf3 Ne7 6.b5 Ng6 7.Be2 e4 8.Bf6 Qf6 9.Nd4 0–0 10.Nc3 c6 (better is 10...Nh4!? 11.0–0 Qg5=) 11.Ne4+/– Qe7 12.Nc3 Be6 13.f4 d5? (better is 13...Nh4!? 14.0–0 Nf5+/–) 14.f5+– dc4 (14...Nh4 15.bc6 (15.Ne6?! fe6 16.0–0 Qg5+=; 15.fe6?! Ng2 16.Kf2 Nh4+–) 15...Bc8 16.Nd5+–) 15.0–0 Bd5 (15...cb5 16.fg6 hg6 17.Ncb5 Rc8+–) 16.fg6 (16.Nd5?! cd5 17.fg6 hg6+–) 16...fg6 17.Rf8 (17.Rf8 Qf8 18.bc6 bc6 19.Qa4+–) 1–0. Speedy – Macho, internet, 2017.

5.Nf3 Ne7 6.Be2 Ng6 7.0–0 0–0 8.Qc2 Nc6 (8...c5 9.a3=) 9.a3 (9.b5 Nce7=) 9...Nce7 (9...e4 10.Ne1=) 10.d3 Nh4 11.Nh4 Bh4 12.f4 Nf5 13.Rf3 (13.Qd2 ef4 14.e4 Bg5 15.ef5 f3+=) 13...Bf6 (13...ef4!? 14.e4 Ne3+=) 14.fe5= de5 (worse is 14...Be5 15.d4 Qg5 16.Bd3 (16.de5?! Ne3 17.Re3 Qe3 18.Kf1 de5=) 16...Ne3 A) worse is 17.Bh7 Kh8 18.Qe2 Bf4+= (worse is 18...Kh7 19.de5 Ng4 20.ed6 cd6 21.Rg3+/–); B) 17.Qe2+/–) 15.Nd2 a6 16.Ne4 h6?? (better is 16...Bg5 17.Qd2 Nd4 18.Ng5 Qg5+=) 17.Nf6+– gf6 18.Raf1 Kg7 (18...Nd6+–) 19.Rf5 Bf5 20.Rf5 1–0. GuestVVXJ – GuestQVZT, freechess.org, 2017.

5.Nf3 Bg4 6.Be2 Nd7 7.Nc3 (7.d4 a5=) 7...Ne7 (7...a5 8.ba5 e4 9.Nd4 Be2 A) worse is 10.Nce2 c5–/+ (10...Ra5?! 11.Bc3 Ra6 12.0–0=); B) 10.Qe2=) 8.h3 (8.0–0 a5 9.ba5 0–0=) 8...Bh5 (8...Be6 9.0–0=) 9.g4+= Bg6? (better is 9...e4 10.gh5 ef3 11.Bf3 Ne5+/–) 10.g5+– e4 (10...Bg5 11.Ng5 Nc6 12.b5 Qg5 13.bc6 bc6 14.h4+–) 11.gf6 ef3 (11...Nf6 12.Nh4 0–0+–) 12.fe7 Qe7 13.Bf3 0–0–0 (13...Ne5 14.Be2+–) 14.Nd5 Qf8 15.Qa4 c6 (15...Kb8 16.Bd4 Nb6 17.Nb6 ab6 18.Qb3+–) 16.Qa7 cd5 17.Bd5 Nc5 (17...Re8 18.Bb7 Kd8+–) 18.bc5 Rd7 19.Ba3 dc5 20.Qa8 Kc7 21.Qb7 Kd8 22.Qb8 1–0. Janek – Silvmoon, internet, 2017.

5.g3 Ne7 6.Bg2 Nd7 7.Ne2 a5 8.a3 Nb6 9.d3 Ra7 10.Nd2 Bd7 11.b5 c6 12.a4 0–0 13.Ne4 Nec8 (13...Nf5 14.Nf6 Qf6 15.e4=) 14.Nf6 Qf6 15.0–0 Qh6 16.Nc3 Ne7 17.Ba3 Nbc8 18.Ne4 f5 19.Nd2 f4 20.ef4 ef4 21.Ne4 fg3 (21...cb5 22.ab5 Bh3 23.Bh3 Qh3 24.Qf3+= (24.Nd6?? f3 25.Qf3 Rf3–+; 24.Bd6?? f3 25.Qf3 Rf3 26.Be7 Ne7–+)) 22.fg3+= c5 (22...Bf5 23.Qe2 c5 24.g4 Be4 25.Rf8 (25.de4?! Qe6+=) 25...Kf8 26.Be4+– (worse is 26.de4 Ke8+/–)) 23.Rf8+/– Kf8 24.Qf3 Kg8? (better is 24...Ke8+–) 25.Rf1 (25.Rf1 Nf5 26.Bc1+–) 1–0. Hal1958 – Daniela, playchess.de, 2004.

5.Be2 a6

6.a3 Nc6 7.Nc3 (7.d3 Nge7 8.Nf3 e4 9.Nd4 ed3 10.Qd3 Bf5=; 7.d4 ed4 8.ed4 d5 9.c5 Nge7 10.Nf3 0–0=) 7...e4 8.f3 Bc3 9.Bc3 Nf6 10.Qb1 Bf5 =.

6.a4 a5 7.b5 Ne7 8.e4 0–0 9.Nf3 Bg4 10.0–0 Nd7 =.

6.a4 Nc6 7.b5 e4 8.Bf6 Qf6 9.Nc3 Qg6 10.Ne4 Qe4 =.

6.a4 Bd7 7.Nc3 Nc6 8.b5 ab5 (8...Nce7 9.d4=) 9.ab5+= Nb4? (better is 9...Ra1!? 10.Qa1 Nb4+=) 10.Ba3+– c5 11.bc6! (11.bc6 Nc6 12.Nb5+–) 1–0. gbmc – rmnk, internet, 2009.

6.a4 e4 7.Nc3 Nc6 8.Qb3 Bc3 9.Qc3 Nf6 10.d3 ed3 =.

6.a4 Be6 7.Qb3 Nc6 8.Nc3 Nge7 9.Ne4 Nf5 10.Nf3 Be7 =.

6.a4 Be6 7.d4 =.

6.a4 Ne7 7.Nf3 (7.Nc3 0–0= 8.Ne4 Ng6 9.Nf3 Be7 10.d4 d5=) 7...0–0 (7...e4!? 8.Nd4 c5–/+ 9.Nc3 cd4 10.Ne4 Be5–/+) 8.Nc3+= (8.e4 Nbc6 9.Qb3 Ng6 10.b5 Nd4+=) 8...b6 (8...e4!? 9.Nd4 Bd4 10.ed4 d5+=) 9.Ne4= Ng6 10.Nf6 (10.0–0 Be7=) 10...Qf6 11.0–0 Bb7 12.Qc2 (12.d4 a5 13.b5 Re8+=) 12...Qe7 (12...Nc6 13.Bc3=) 13.d4+= e4 14.Nd2 d5 15.c5 (15.Bc3 Rd8+=) 15...bc5 (15...Nh4 16.Rfc1 Nc6 17.Qb3+=) 16.bc5 (16.Qc5 Qc5 17.dc5 Nd7+/–) 16...Nc6 (16...Bc8 17.Rfb1+=) 17.Bc3 (17.Qb3 Qe6+/–) 17...a5 18.Rfb1 Ba6 19.Ba6 (19.Bb5 Qf6+=) 19...Ra6 20.Rb5 (20.Rb7 Nh4+=) 20...f5 21.g3 (21.Qa2 Qe6=) 21...h5 (21...Qg5!?=) 22.Nb3 The pressure on the isolated pawn grows 22...Rfa8 23.Qd2 h4 24.Na5 Na5 25.Ra5 (25.Ba5? c6–+) 25...Ra5 26.Ba5 c6 27.Bb6 hg3 (27...Qg5 28.a5+/–) 28.hg3 (28.fg3 Qg5+/–) 28...Qb7 (28...Qg5 29.a5+/–) 29.Qe2 Ne7 (29...Qe7 30.a5+/–) 30.a5 Ra6 31.Qh5 g6 32.Qg5 Kg7 33.Kg2 Nc8?? (better is 33...Qd7+–) 34.Rh1 Nb6 (34...Qe7 35.Qh6 Kf7 36.Qh7 Kf6 37.Qh8 Qg7 38.Qc8 Kf7 39.Qb7 Kf8 40.Qa6 f4 41.Qc8 Kf7+–) 35.ab6 (better is 35.Qh4 Ra8 36.Qh7 Kf6 37.Qb7+– (37.cb6?! Qh7 38.Rh7 Ra5+–)) 35...Ra8 36.Rh6 (better is 36.g4!? Qf7+–) 36...Qf7 37.Qh4 (37.Qh4 Qg8 38.Qf4+–) 1–0. Kucharkowski,Jens – Goettlich, Freital, 1987.

6.a4 Bf5 7.d3 (7.Nc3 Ne7 8.e4 Be6 9.Nd5 Nec6 10.Bc3 a5=) 7...Ne7 8.Nf3 0–0 9.0–0 a5 10.b5 Nd7 =.

6.a4 Nh6 7.Nc3 0–0 8.Nd5 a5 9.b5 c6 10.bc6 bc6 =.

6.Nc3 Nc6 7.a3 (7.b5 ab5 8.cb5 Nce7 9.Nf3 e4 10.Nd4 Bd4=; 7.Nd5 e4 8.Rb1 Bb2 9.Rb2 Nf6 10.d3 Bf5=) 7...Be6 8.d3 Nh6 9.Nf3 Nf5 10.0–0 0–0 =.

6.d3 Ne7 7.Nc3 (7.Qd2 Nbc6 8.Nf3 0–0 9.0–0 Be6 10.a4 Ng6=) 7...Nbc6 8.a3 d5 9.cd5 Nd5 10.Nd5 Qd5 =.

6.d4 ed4 7.ed4 d5= 8.Nf3 dc4 9.Bc4 Qe7 10.Qe2 Nc6 =.

5.Be2 Be6

6.Nc3 Nc6 7.Qb3 Nh6 8.b5 Na5 9.Qa4 b6 10.Nd5 a6 11.ba6 =.

6.Nc3 Nc6 7.b5 Na5 8.Qa4 c6 9.Ne4 d5 10.Nf6 gf6 11.cd5 +/–.

6.Nc3 Nc6 7.b5 Nb8 8.Nf3 Nd7 9.0–0 Nb6 10.d3 a6 +=.

6.d3 a5 7.b5 a4 8.Nf3 Nh6 9.a3 Nd7 10.Nc3 0–0 11.Na4 +=.

6.d3 a5 7.b5 Ne7 8.Nd2 0–0 9.Ngf3 Nd7 10.Ne4 Ng6 =.

6.d3 a5 7.b5 Ne7 8.Nf3 0–0 9.0–0 a4 10.Nbd2 Nd7 11.Ne4 =.

6.d3 d5 7.Nc3 Ne7 8.Nf3 0–0 9.0–0 Nd7 10.cd5 Nd5 11.Nd5 =.

6.d3 d5 7.Nd2 Nd7 8.cd5 Bd5 9.Ngf3 Qe7 10.a3 e4 11.Bf6 =.

6.d3 d5 7.Nd2 Qe7 8.a3 dc4 9.dc4 e4 10.Qc2 Bb2 11.Qb2 =.

6.d3 d5 7.Nd2 Ne7 8.Ngf3 Nd7 9.0–0 0–0 10.cd5 Nd5 11.b5 =.

6.d3 Nd7 7.Nf3 Ne7 8.0–0 a5 9.b5 a4 10.Nbd2 0–0 11.Ne4 =.

6.d3 Nd7 7.Nf3 Ne7 8.Nc3 d5 9.0–0 0–0 10.cd5 Nd5 =.

6.Nf3 Nc6 7.d4 ed4 8.Nd4 Nb4 9.Qb3 c5 10.Ne6 fe6 =.

6.Nf3 Nc6 7.d4 ed4 8.Nd4 Nd4 9.Bd4 c5 10.Bf6 Nf6 11.Nd2 =.

6.d3 Ne7

7.Nc3 0–0 8.Ne4 Ng6 9.Nf3 Be7 10.0–0 a5 11.a3 =.

7.Nc3 a5 8.b5 0–0 9.Nf3 Nd7 10.0–0 Ng6 11.Qc2 =.

7.Nc3 d5 8.Nf3 0–0 9.0–0 Nd7 10.cd5 Nd5 11.Nd5 =.

7.Nd2 0–0 8.Ngf3 Ng6 9.0–0 d5 10.Qc2 Qe7 11.cd5 =.

7.Nd2 a5 8.b5 0–0 9.Ngf3 Nd7 10.Ne4 Ng6 11.0–0 =.

7.Nd2 d5 8.Ngf3 Nd7 9.0–0 0–0 10.cd5 Nd5 11.b5 =.

7.Nd2 Ng6 8.Ngf3 0–0 9.0–0 d5 10.Qc2 Qe7 11.cd5 =.

7.Nf3 0–0 8.Nbd2 a5 9.b5 Ng6 10.0–0 Nd7 =.

7.Nf3 0–0 8.Nbd2 Ng6 9.0–0 d5 10.Qc2 Qe7 11.cd5 =.

7.Nf3 a5 8.b5 Ng6 9.Nc3 0–0 10.0–0 Nd7 11.Qc2 =.

7.Nf3 a6 8.Nc3 d5 9.d4 ed4 10.Nd4 0–0 11.Ne6 =.

7.Nf3 Nd7 8.Nc3 d5 9.0–0 0–0 10.cd5 Nd5 11.Nd5 =.

6.d3 Nh6

7.Nc3 0–0 8.Nf3 Nc6 9.b5 Nb8 10.0–0 Nd7 11.d4 =.

7.Nc3 a5 8.b5 Nd7 9.Nf3 0–0 10.0–0 Re8 11.Ne4 =.

7.Nc3 a6 8.Nf3 Nc6 9.d4 ed4 10.Nd4 Nd4 11.ed4 =.

7.Nc3 Na6 8.a3 0–0 9.Nf3 c5 10.b5 Nc7 11.0–0 +=.

7.Nc3 Na6 8.Qa4 c6 9.Nf3 0–0 10.0–0 Nf5 =.

7.Nc3 Nc6 8.b5 Ne7 9.Ne4 Ng6 10.Bf3 Be7 11.Nc3 =.

7.Nc3 Nd7 8.Nf3 0–0 9.0–0 Re8 10.Ne4 Be7 11.Qb3 =.

7.Nc3 Nf5 8.Nf3 0–0 9.0–0 Re8 10.Ne4 a5 11.Qa4 =.

7.Nd2 a5 (7...0–0 8.Ngf3 a5 9.b5 Nd7 10.Ne4 Nf5 11.g4=) 8.b5 a4 9.Ngf3 0–0 10.0–0 a3 11.Bc3 =.

7.Nf3 Nc6 8.Qd2 a6 9.0–0 0–0 10.a3 d5 11.cd5 =.

6.Nf3 Ne7

7.0–0 0–0 (7...a5 8.b5 Nd7 9.Nc3 0–0 10.Ne4 Ng6 11.d4=; 7...Nd7 8.d4 a5 9.a3 0–0 10.Nc3 ed4 11.Nd4=) 8.d4 ed4 9.ed4 Re8 10.Re1 a6 11.Qd2 =.

7.a3 0–0 (7...a5 8.0–0 Nec6 9.d4 ed4 10.ed4 ab4 11.ab4=) 8.0–0 a5 9.b5 Nd7 10.d4 ed4 11.Nd4 =.

7.Qb3 0–0 8.0–0 a5 9.ba5 Nbc6 10.Bc3 d5 11.d3 =.

7.Qc2 Nd7 (7...a5 8.b5 Nd7 9.0–0 0–0 10.d4 ed4 11.Bd4=; 7...0–0 8.0–0 a5 9.b5 Nd7 10.d4 ed4 11.Bd4=; 7...Na6 8.a3 c5 9.b5 Nc7 10.0–0 Ng6 11.d4=; 7...Ng6 8.d4 ed4 9.Nd4 a5 10.b5 Nd7 11.0–0=) 8.d4 a5 9.b5 ed4 10.Nd4 0–0 11.0–0 =.

7.Nc3 0–0 (7...e4 8.Nd4 Bd4 9.ed4= d5 10.cd5 Nd5 11.Ne4=) 8.d3 (8.Ne4 Ng6= 9.d4 Be7 10.d5 Bg4 11.h3=) 8...Ng6 (8...d5 9.0–0 Nd7 10.cd5 Nd5 11.Nd5=) 9.h3 (9.0–0 a5 10.b5 Nd7 11.Qc2=) 9...Nd7 (9...Na6 10.a3 c5 11.bc5=) 10.Qc2 (10.0–0 Nb6 11.Ne4=) 10...a5 11.a3 (11.b5=) 11...c6 12.g4 (12.0–0 d5=) 12...Nh4 (12...ab4 13.ab4 Ra1 14.Ba1+=) 13.b5 Nc5 (13...d5 14.Nh4 Bh4 15.0–0+=) 14.Rb1 (14.Nh4 Bh4 15.d4 Qf6 16.dc5 Qf2 17.Kd2 dc5+/–) 14...d5 (14...Nf3 15.Bf3 d5 16.bc6 bc6 17.cd5 cd5 18.Nb5+=) 15.bc6 (15.Nh4 dc4 16.dc4 Bh4=) 15...bc6 (15...dc4 16.dc4 Nf3 17.Bf3 Nd3 18.Kf1 bc6 19.Kg2 Nb2 20.Rb2 Bc4 21.Be4=) 16.Nh4= Bh4 17.Ba1 (17.d4 ed4 18.ed4 Nd7=) 17...f5 (17...dc4 18.dc4 f5–/+) 18.gf5 (18.cd5 cd5 19.Nd1 Qd6=) 18...Rf5 (18...dc4 19.Ne4 Nd3 20.Kf1–+) 19.Rf1 (19.Nd1 dc4 20.d4 Qd5–/+) 19...Qf6 (better is 19...Rf7 20.cd5 Bh3–/+) 20.Bd1?? (better is 20.cd5 Rf2 21.Kd2 Bh3 22.Rf2 Qf2 23.dc6+=) 20...Bf2! 21.Rf2 Rf2 (21...Rf2 22.Ne2 dc4–+) 0–1. Saiyajin – vhpower, playchess.de, 2002.

7.d3 0–0 (7...a5 8.b5 0–0 9.Nc3 Nd7 10.0–0 Ng6 11.Qc2=) 8.Nbd2 a5 9.b5 Nd7 10.Ne4 Ng6 11.0–0 =.

7.d4 ed4 8.ed4 d5= (8...a5 9.b5 Nd7 10.Nc3 Nb6 11.d5=) 9.c5 0–0 10.0–0 Re8 11.Re1 =.

7.d4 Nd7 8.0–0 a5 9.a3 0–0 10.Nc3 ed4 11.Nd4 =.

7.e4 0–0 (7...Nbc6 8.a3 0–0 9.0–0 Re8 10.d3 Qd7 11.Nc3=) 8.Nc3 a5 9.b5 Nd7 10.0–0 Nc5 11.Qc2 =.

5.e4 b6

6.Nc3 a5 7.ba5 Ra5 8.Nd5 (8.Nf3 Ne7= 9.Be2 0–0 10.0–0=) 8...Be6 (8...c6 9.Ne3 Nd7 10.Nf3=) 9.Nf6 (9.Nf3 c6 10.Ne3 Nd7=) 9...Nf6+= (worse is 9...gf6 10.d4+=) 10.d3 (10.Bc3+=) 10...0–0 11.Nf3 Nfd7 12.Nd2 (12.Bc3 Ra8+=) 12...c5 (12...f5 13.Be2+=) 13.Be2= Nc6 14.Nb3 Ra8 15.0–0 Nd4 16.Nd4 cd4 17.Bf3 (17.f4!? f5 18.Bf3 fe4 19.Be4=) 17...Nc5+= 18.a3 f5 19.ef5 Bf5 20.Ba8 Qa8 21.Bc1 (21.Qh5 Bd3 22.Rfd1 Qa4–/+) 21...Bd3 (worse is 21...Nd3 22.Qb3+=) 22.Re1 Bc4 23.Qc2 Bd3 (better is 23...Qd5!? 24.Bd2 Nd3 25.Rf1–+) 24.Qb2 Qc6 (24...b5 25.Rd1 Bc4 26.f3–+) 25.Qa2 Kh8 26.f3 h6 (26...Bg6 27.Bg5–/+) 27.Bd2 Ne4?? (better is 27...Rf5–/+) 28.fe4+– (28.Re4?! Be4 29.fe4 Qe4=) 28...Be4 29.Rac1 Qb7 (29...Qd5 30.Qd5 Bd5 31.Rb1+–) 30.Qe6 (better is 30.Bb4!? Rf6 31.Rf1+–) 30...Bg2+/– 31.Re2 (31.Qd6?! Qf3 32.Qf8 Qf8 33.Kg2 Qf5+=) 31...Rf6?? (31...Bf3 32.Rf2 Kh7 33.Qd6 Rf6 34.Qe5 Rg6 35.Qg3 Rg3 36.hg3 Bd5–+) 32.Rc8+– Kh7 33.Qg8 Kg6 34.Rg2 Kh5 35.Qg7 (better is 35.Rf8 Qg2 36.Kg2 Kg6+–) 35...Qg2 (35...Qg7 36.Rg7 e4+–) 36.Qg2 Rg6 37.Rb8 (37.Rc6 Rg2 38.Kg2 Kg4+–) 37...Rg2 38.Kg2 Kg4 (38...Kg6 39.Rb6 Kf5 40.Bh6 e4 41.Rd6 Ke5+–) 39.Bh6 1–0. guest1005 – guest220, ICC, 2002.

6.Nc3 a5 7.b5 Ne7= 8.Nf3 Bg4 9.h3 Be6 10.Nd5 +=.

6.Nc3 c5 7.Nd5 Nc6 8.a3 Nce7 9.Nf3 Nd5 10.cd5 =.

6.Nc3 Be7 7.Nf3 Nf6 8.Be2 Nbd7 9.0–0 Bb7 10.Qc2 =.

6.Nc3 Ne7 7.Nf3 0–0 8.Be2 a5 9.b5 Nd7 10.0–0 =.

6.Nc3 Ne7 7.Nf3 Bg4 8.h3 Bf3 9.Qf3 0–0 10.Be2 (10.b5 a6+=) 10...Nec6 (better is 10...Nbc6=) 11.Qd3 (11.Nd5 Bg5+=) 11...a5 (11...Nb4 12.Qb1+=) 12.a3 (better is 12.b5!? Nd4 13.Bg4+=) 12...ab4+= 13.ab4 (13.Nd5 Na6+=) 13...Ra1 14.Ba1 Nd7 (better is 14...Nb4!? 15.Qb1 N8c6+=) 15.Nd5+= Nd4 16.Bd4 (16.Bg4 Ne6+=) 16...ed4= 17.0–0 Ne5 Black is in command 18.Nf6 (18.Qb3 c6 19.Nf6 Qf6=) 18...Qf6 19.Qb3 (19.Qg3 Ra8 20.f4 Ng6=) 19...Qg6 (19...Qf4 20.Qc2=) 20.d3 c5 21.f4 Nc6 22.f5 (22.b5 Nb4=) 22...Qg3+= 23.Rf3 (23.bc5 bc5 24.Qd1 f6+=) 23...Qe1–/+ 24.Bf1 Qb4 25.Qd1 (25.Qb4 Nb4 26.f6 Rb8–/+) 25...Ne5 26.Rg3 (26.Rf2 b5–/+) 26...b5 (26...f6 27.Qa1–/+) 27.Qh5 (better is 27.f6 g6 28.Qc1+=) 27...g6 (better is 27...f6!? 28.Qh6 Rf7 29.cb5 Qe1–+) 28.Qh6= Threatening mate... how? 28...Kh8?? Dopper,Johan – Verkerk, Zomer, 1994.

6.Be2 a6 (6...Ne7 7.Nf3 0–0 8.0–0 c5 9.a3 Nbc6 10.b5=; 6...c5 7.a3 Ne7 8.Nf3 0–0 9.0–0 Nbc6 10.b5=) 7.Nf3 Ne7 8.0–0 0–0 9.a3 c5 10.bc5 =.

6.Nf3 Ne7 7.Be2 0–0 8.0–0 a6 9.a3 c5 10.bc5 =.

5.Nf3 e4

6.Bf6 gf6 7.Nd4+= f5 (7...Nc6 8.Nc6 bc6 9.Nc3 f5 10.Be2 Nf6 11.0–0 Bd7 12.d4 0–0) 8.Nc3 Nf6 9.Be2 0–0 10.0–0 Na6 11.a3 c5 12.Nc2 Kh8.

6.Bf6 gf6 7.Ng1 +=.

6.Bf6 Nf6 7.Nd4 0–0 8.Nc3 c5 9.bc5 dc5 10.Nb3 Nc6 11.Nc5 Qe7 12.Nb3 Be6.

6.Bf6 Nf6 7.Nd4 c5 8.bc5 dc5 9.Nb3 Nc6 10.Nc3 b6 11.f3 0–0 12.fe4 Re8.

6.Bf6 Nf6 7.Nd4 d5 8.Nc3 c6 9.cd5 cd5 10.Bb5 Bd7 11.Qa4 a6 12.Bd7 Nfd7 (better is 12...Qd7!? 13.d3 Nc6 14.Nc6 Qc6 15.Qc6 bc6 16.de4 Ne4 17.Ne4 de4=) 13.Nd5+/– 0–0 14.Nc3 b5 (14...Nf6!?+/–) 15.Qc2+– Ne5 (15...Re8 16.Ne4 Qe7 17.Nc5+–) 16.Ne4 Nbc6?? (better is 16...Nbd7+–) 17.Nc6 Nc6 18.Qc6 Rc8 19.Qd6 Qd6 20.Nd6 Rcd8 21.Ne4 Rfe8 22.Nc5 Rd6 23.d4! f5 (23...Rd4 24.Na6 Deflection) 24.0–0 g5 25.Rfd1 g4 26.g3 h5 27.a4 ba4 28.Ra4 Ra8 29.Rda1 h4 (29...Rb6 30.Na6 Kf7 31.Ra5+–) 30.Ra6 Rda6 31.Ra6 Rb8 32.gh4 Rb4 (32...Kg7 33.Ra7 Kg6 34.Nd3+–) 33.Kg2 (better is 33.Rf6!? Kg7 34.Rf5 Rb6+–) 33...Rb7 (33...Kf7+–) 34.Nb7 (34.Nb7 Kg7 35.h3+–) 1–0. Fournier,Frederic – oscar49, Active, 2008.

6.Bf6 Nf6 7.Nd4 Bd7 8.d3 Nc6 9.Nc6 Bc6 10.b5 Bd7 11.de4 Ne4 12.Bd3? (12.Qd4 Nf6=) 12...Ng5?? (better is 12...Nf2 13.Kf2 Qf6 14.Qf3 Qa1 15.Qb7 Qa2 16.Be2 Rc8–+) 13.Nd2 0–0 14.Ne4 Ne4 15.Be4 c6 16.a4 (16.Qd6 cb5 17.cb5 Bb5 18.Qd8 Rfd8 19.Bb7 Rab8+=) 16...Rc8 (better is 16...Re8!? 17.Qd3 Qh4+=) 17.Qd6+/– Qe8 18.Bf3 Qe6 19.Qe6 Be6 20.Rc1 (20.bc6 bc6 21.c5 Rfd8+/–) 20...Rfd8 (20...cb5!? 21.ab5 Rc4+=) 21.0–0 cb5 22.cb5 (worse is 22.Bb7 Rc7 23.Rfd1 Rb8+=) 22...b6 23.Bc6 (23.Rc6!? Bd7 24.Rc8 Rc8+/–) 23...Bb3 24.a5 (better is 24.Rc3 Bd1 25.h3+/–) 24...Bc4?? (better is 24...ba5 25.Rc5 a4=) 25.Rc4+– ba5 26.Ra4 (better is 26.Ra1 Rd6+–) 26...Rd3 (26...a6+–) 27.Ra5 Rcd8 28.Ra7 Rd1 29.Ra1 (29.b6 R1d6 30.Rc7 Rb8+–) 29...Rf1 (29...R1d6 30.Rfc1 Kf8 31.b6+–) 30.Kf1 h6 (30...Kf8 31.b6 Ke7 32.b7+–) 31.Rb1 (better is 31.Ra8 Ra8 32.Ba8 h5+–) 31...Kh7 (31...Kf8 32.b6 Ke7 33.Ke2+–) 32.Be4 (better is 32.b6 Rb8 33.b7 Kg6+–) 32...g6 33.b6 f5 34.Bf3 g5 35.g3 g4 36.Bg2 Kg6 37.b7 Rb8 38.Rc1 f4 (38...Rd8 39.Rc8 Rd1 40.Ke2+–) 39.ef4 1–0. Fournier,Frederic – yonimak, Active, 2008.

6.Bf6 Qf6

7.Nd4 c5 8.bc5 dc5 9.Nc2 Bd7 10.Nc3 Na6 11.Ne4 Qe5 12.f3 Ba4 13.d4 cd4 14.ed4 Bc2 15.de5 Bd1 16.Rd1 Rb8 17.c5 Ke7? (better is 17...Nb4+–) 18.c6! Nb4 (18...bc6 19.Ba6 Deflection) 19.Rd7 Ke6 20.Ng5 Ke5 21.Nf7 Ke6 22.Bc4 Kf6 23.c7 Re8 (23...Nh6 24.Nh8 Rc8+–) 24.Kf2 Ne7 25.Rd6 Kf5 26.g4 Kf4 27.Rd4 1–0. b4_player – bambi, casual, 2013.

7.Nd4 c5 8.bc5 dc5 9.Nc2 Bd7 10.Nc3 Nc6 11.Ne4 Qe6? (better is 11...Qe7 12.d3 0–0–0+=) 12.Nc5+– Qe7 13.d4 (13.Nb7?! Bc8+=) 13...b6 14.Nd7 Qd7 15.d5 Ne5 16.Qd4 Qf5 17.Nb4 Nf6 18.f4 0–0?? (18...Neg4+–) 19.Qe5 Qd7 20.Qd4 a5 (20...Qd6 21.Rb1+–) 21.Nc6 Rfe8 22.Bd3 Qg4 23.0–0 Rac8 (23...Nd7 24.Rf3 g6 25.d6+–) 24.Ne5 Qh5 25.Rf3 Re5 26.fe5 Nd7 27.Bf5 Ne5 (27...Rd8 28.e6 Nc5 29.Qe5 Ne6 30.de6+–) 28.Qe5 Rf8 29.Rh3 f6 30.Qe6 Qf7 (30...Kh8 31.Rh5 h6 32.Qe7 Kg8 33.Rh6 Rf7 34.Qd8 Rf8 35.Be6) 31.Bh7 Kh8 32.Bg6 Kg8 33.Rh8! Kh8 (33...Kh8 34.Qh3) 34.Qh3 1–0. Janek – Felix, internet, 2016.

7.Nd4 c5 8.bc5 dc5 9.Nc2 Ne7 10.Nc3 0–0 11.Ne4 Qe5 12.Bd3 (12.Ng3 Rd8+=) 12...Bf5 (12...Rd8 13.Qe2+=) 13.f4 (13.Qh5 Nd7+=) 13...Qc7 14.g4 Be4 (14...Bd7 15.f5+=) 15.Be4+/– Nd7 16.Na3 (16.Qf3 Rab8+=) 16...a6 (16...Nf6 17.Bg2+=) 17.Qc2 (17.Qb1 Nf6 18.Bf3 Rab8+=) 17...g6 (17...Nf6 18.Bf3+=) 18.g5 Rad8 19.Rb1 Nb6 (19...Nc6 20.0–0+/–) 20.h4+– Nc6 21.h5 Nb4 22.Qc3 (22.Qb2 Qd6 23.hg6 fg6 24.0–0=) 22...Rd7 (22...Qd6 23.d4 Rfe8 24.hg6 fg6 25.dc5 Qc5 26.Rh7 Kh7+/–) 23.Rh2 (23.Nc2 Re8 24.hg6 fg6 25.Bg6 Qf4 26.Nb4 Qg3 27.Kd1 cb4 28.Rb4 Qf3 29.Kc2 Qh1 30.Be8 Qe4 31.Kc1 Rc7+/–) 23...Rfd8 (23...Na2 24.Qf6 Rd6 25.Qe5+/–) 24.hg6+– fg6 25.Bg6 N6d5? (better is 25...Re7+/–) 26.cd5+– Nd5 27.Qb2 hg6 28.Qh8 Kf7 29.Rh7 (better is 29.Qh7 Kf8 30.Qg6+–) 29...Ke6 30.Rb6!! Kf5 (30...Qb6 31.Qe5 mate Mate attack; 30...Nb6 31.Qf6 Deflection) 31.Rf6! Nf6 (31...Nf6 32.Qf6 Deflection) 32.Qf6 Kg4 (32...Ke4 33.Qe6 Qe5 34.Qe5 Kd3 35.Qe6 Rd4 36.ed4 Re8 37.Rh3 Kd4 38.Nc2) 33.Qe6 Kf3 34.Rh3 Kg2 35.Qg4 1–0. Janek – zaquz, internet, 2017.

7.Nd4 Nc6 8.Nb3 Qh4 +=.

7.Nd4 Nc6 8.Nb3 Nge7 9.Nc3 Bf5 10.g4 Bg6 11.h4 h6 12.h5 Bh7.

7.Nd4 Nc6 8.Nb5 Qe7 (8...Qa1 9.Nc7 Kd8 10.Na8 Nb4 11.a3 Nc6 12.Nc3 Qd1) 9.a3+= (9.N1c3 Nf6 10.Nd5 Nd5 11.cd5 Ne5 12.Qc2 c6) 9...Nf6 10.N1c3 a6 11.Nd4 Bd7 12.Be2 0–0.

7.Nd4 Ne7 8.Nc3= c5?? (better is 8...Qg6= 9.Qb1 f5 10.c5 dc5 11.bc5 0–0 12.h4 Nbc6) 9.Ndb5+– Na6 (better is 9...Kd8 10.Ne4 Qg6 11.Ned6 cb4+–) 10.Ne4 Qg6 11.Nbd6 Kf8 12.Qf3?? (12.b5 Nc7 13.Nc8 Rc8 14.Nc5 Nb5+–) 12...Bf5?? (12...Bg4 13.Qf4 Nb4+/–) 13.Nf5+– Nf5 14.Bd3 Rd8? 15.0–0 Rd3+= 16.b5?? Nb4?? 17.a3?? Nc2 18.Ra2?? Na3?? 19.Nc5+– Rd8 20.Ra3 b6 21.Ne4 Nh4+/– 22.Qg3 Qe4 23.d4 Nf5 24.Qc7+/– Re8 25.Ra7+– Qe7 26.Qe7 Ne7 27.Rfa1 g6 28.c5 bc5 29.dc5 Kg7 30.b6 Nd5 31.Rd7 Ne7 32.b7 Nc6 33.Rc7 Nb8 34.Ra8 h6 35.Rb8?? Rb8+= 36.Rd7?? Rhe8 37.c6?? Kf6 38.c7?? Ke6 39.cb8Q Rb8 40.Rc7 Kd6 41.Rf7 g5 42.Rh7 h5 43.Rh5 Rb7 44.g3 Rg7 45.f3 Ke6 46.Kf2 Kf6 47.e4 Ke5 48.f4 Kf6 49.e5 Kf5 50.Rg5 Rg5 51.fg5 Kg5 52.e6 Kg6 53.e7 Kf7 1–0. morkt – jan314, kurnik, 2011.

7.Nd4 h6?? 8.Nc3+/– Nc6 (8...Ne7 9.Ne4 Qg6 10.Qb1+/–) 9.Nd5 (worse is 9.Ne4 Qg6 10.Nc6 bc6+/–) 9...Qd8 10.Nb5 Rb8 11.Nbc7 Kd7?? (better is 11...Kf8 12.Qa4 Nge7+–) 12.Qg4 f5 13.Qf5 1–0. b4_player – anony, internet, 2014.

4.c4 Nf6

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

5.Nf3 0–0 6.Be2 Bg4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 Bg4 6.Be2 0–0).

5.Nf3 Bf5 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Bf5 5.Nf3 Be7).

5.Nf3 Bg4 6.Be2 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 Bg4 6.Be2 0–0).

5.Nf3 Bg4 6.Be2 0–0 7.0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 Bg4 6.Be2 0–0 7.0–0).

5.Nf3 h6 6.Be2 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 0–0 6.Be2 h6).

4.c4 Nh6

5.Nc3 0–0 A) 6.Be2 Bf6 (6...c5 7.a3 Na6 8.b5 Nc7 9.Nf3 f5 10.d3=; 6...Na6 7.a3 c5 8.b5 Nc7 9.Nf3 f5 10.d3=; 6...Bf5 7.Nf3 Nd7 8.0–0 a5 9.b5 Re8 10.d3=) 7.Ne4 Bf5 8.Nf6 Qf6 9.Nf3 a5 10.b5=; B) 6.Nf3 Nd7 (6...f5 7.Nd5 e4 8.Nd4 c5 9.Nb5 Na6 10.bc5=; 6...a5 7.b5 Nd7 8.Be2 Nb6 9.0–0 Be6 10.d3=; 6...Bf5 7.Be2 Nd7 8.0–0 a5 9.b5 Re8 10.d4=; 6...Bg4 7.Be2 Bf6 8.Ne4 a5 9.b5 Be7 10.Nc3=) 7.d4 a5 8.a3 ed4 9.Nd4 ab4 10.ab4=.

5.Nc3 a5 6.b5 0–0 (6...Nd7 7.Nf3 0–0 8.Be2 Nb6 9.0–0 Be6 10.d3=) 7.Be2 Be6 8.Nf3 Nd7 9.0–0 Nb6 10.d3=.

5.Nc3 Nd7 6.Nf3 Bf6 (6...a5 7.b5 0–0 8.Be2 Nb6 9.0–0 Be6 10.d3=; 6...0–0 7.Be2 Nb6 8.0–0 Be6 9.Qb3 a5 10.ba5=) 7.d4 ed4 8.Nd4 0–0 9.Bd3 Ne5 10.0–0=.

5.Nf3 0–0 6.Nc3 (6.d3 c6 (6...Bf6 7.Nc3 Re8 8.Be2 c5 9.a3 Na6 10.b5=; 6...Nd7 7.Be2 a5 8.b5 a4 9.0–0 Re8 10.Nc3=) 7.Be2 Qb6 8.a3 a5 9.Qd2 Bg4 10.0–0=) 6...Bg4 (6...Bf5 7.Be2 Nd7 8.0–0 a5 9.b5 Re8 10.d4=; 6...f5 7.Nd5 e4 8.Nd4 c5 9.Nb5 Na6 10.bc5=; 6...Nd7 7.Be2 a5 8.b5 Nb6 9.0–0 Be6 10.d3=; 6...a5 7.b5 Nd7 8.Be2 Nb6 9.0–0 Be6 10.d3=) 7.h3 (7.Be2 Bf6 8.Qc2 a5 9.b5 Nd7 10.0–0=) 7...Bf3 (7...Bh5 8.Be2= Bf6 9.Nd5 Be7 10.0–0=; 7...Be6 8.d4 a5 9.b5 ed4 10.Nd4=) 8.Qf3+= c6 9.Bd3 (9.b5 f5 10.bc6=) 9...f5 10.Bc2 (10.Qd1=) 10...Nd7 11.0–0 Qe8 12.b5 e4 13.Qe2 Ne5 14.d3 ed3 15.Bd3 Nd3 16.Qd3 Rd8 17.Rab1 Bf6 18.bc6 bc6 (18...Qc6? 19.Nd5 Rf7 20.Bf6 gf6 21.Qd4+–) 19.Ne2 Be5 20.c5 (20.Rfd1 Rb8 21.Be5 de5 22.Rb8 Qb8+=) 20...Bb2 21.Rb2 Qe5 (21...dc5 22.Qc4 Qf7 23.Qc5+/–) 22.Qb3+= d5 (22...Kh8 23.Nd4 Rc8 24.cd6 Qd6 25.Rc1+/–) 23.Rfb1 Rc8 24.Qa4 Rf7 25.Rb7 Rb7 26.Rb7 Nf7 27.Qa7 Ng5? (better is 27...Qa1 28.Kh2 Qf6+–) 28.Nd4+– h6 29.Re7 Qf6 30.Qd7 Rb8 31.Nf5 (31.Nc6!? Rb1 32.Kh2 Rf1+–) 31...Rf8 32.Rg7 The passed pawn on f2 will quickly become a dangerous weapon (32.h4 Qf5 33.Qf5 Rf5 34.hg5 Rg5+–) 32...Kh8 33.f4 Nf7?! (33...Qf5 34.fg5 Qd7 35.Rd7 hg5 36.Rc7+–) 34.g4 (34.a3 Qa1 35.Kh2 Qf6+–) 34...h5? (34...Qa1 35.Kg2 Rb8+–) 35.g5 (35.gh5 Ne5 36.Rh7 Kg8 37.fe5 Qg5 38.Kh2 Rf5 39.Rg7 Qg7 40.Qf5 Qa7+–) 35...Qa1 36.Kg2 Qb2 (36...Rb8 37.Rh7 Kh7 38.Qf7 Kh8 39.Qh5 Kg8 40.Qg6 Kh8 41.Qh6 Kg8 42.Qc6 Kh8+–) 37.Kg3 Qe2 38.Kh4 (38.Kh4 Qf2 39.Kh5+–; 38.Rf7?! Qe1 39.Kg2 Qe2 40.Kg1 Qd1 41.Kh2 Qd2 42.Kh1 Qe1 43.Kh2 Qf2 44.Kh1 Qe1 45.Kh2 Qf2 46.Kh1 Qe1=; 38.Qc6?! Qe1 39.Kg2 Qe2 40.Kg1 Qd1 41.Kf2 Qd2 42.Kf1 Qd1 43.Kg2 Qe2 44.Kh1 Qd1 45.Kh2 Qe2 46.Kh1 Qf3 47.Kh2 Qf2 48.Kh1 Qe1 49.Kh2 Qf2 50.Kh1 Qe1 51.Kh2 Qf2=) 1–0. Sokolski,Alexey P – Rubenchik,Leonid Y, URS, 1963.

5.Nf3 a5 6.b5 0–0 7.Nc3 Nd7 8.Be2 Nb6 9.0–0 Be6 10.d3 =.

4.d4 ed4

5.Bd4 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.e3 Nf6 4.d4 ed4 5.Bd4 Be7).

5.Nf3 d5 6.b5 (6.a3 c5 7.bc5 Qa5 8.Qd2 Qd2 9.Nbd2=) 6...Bb4 7.Nbd2 Bc3 8.Bc3 dc3 9.Nb1 =.

5.Bd4 Bf6

6.Bb5 Bd7 7.Bd7 Qd7 8.Nf3 Nc6 9.c3 =.

6.c3 Nc6 7.Bf6 (7.Nf3 Nd4 8.cd4 Ne7 (8...a5= 9.b5=) 9.Qc2=) 7...Nf6 (worse is 7...gf6 8.Nf3+= Nge7 9.Bd3+=; 7...Qf6 8.a3 Bf5 9.Ne2+=) 8.Nf3 Be6 (8...0–0 9.Be2=) 9.Bb5 0–0 10.Bc6 bc6 11.0–0 Qe7 12.Nd4 Bd7 13.Nd2 d5 14.N2b3 Ne4 15.Qd3 c5 (15...Rfe8 16.Rac1=) 16.bc5 Nc5 17.Nc5 Qc5 18.Nb3 Qd6 19.Qd4 (19.c4 dc4 20.Qc4 Be6=) 19...Be6 (19...Bf5 20.Rfd1 Rfd8 21.Rd2=) 20.Nc5 Rab8 21.Rab1 (21.Ne6 fe6 22.Qa7 c6+=) 21...Qc6 22.h3 (22.a4 a5=) 22...h6 (22...Rb1 23.Rb1 Bh3 24.Rb7=) 23.a3 Bf5 24.Rb4 a5 25.Rb3 Bc2 (25...Rb3 26.Nb3 Rb8 27.Nd2+=) 26.Rb8 Rb8 27.Rc1 Bf5 (27...Rb5 28.Rc2 Rc5 29.Qd2=) 28.Nd3 (28.c4 dc4 29.Qc4 Qg6=) 28...Bd3 29.Qd3 Rb3 30.e4 (better is 30.a4=) 30...de4–+ 31.Qd8 Kh7 32.Qf8 f6 (32...Rc3 33.Rc3 Qc3 34.Qf7 Qa1 35.Kh2 Qe5 36.Kg1–+) 33.Qc8 (33.Qe7 a4–/+ (33...Rc3?! 34.Rc3 Qc3 35.Qe4 f5 36.Qf5 Kg8 37.Qe6 Kf8 38.Qe3=)) 33...Rb5 (33...Ra3 34.Rd1 Qc5 35.Rd8 Rc3 36.Rh8 Kg6 37.Qe8 Kg5 38.Qf7–/+) 34.Qg4 Rg5 35.Qf4 (35.Qe2 f5–/+) 35...e3!–+ 36.g4 (36.Qe3 Qg2) 36...ef2 37.Qf2 Qc5 (37...h5 38.Qc2 f5 39.Rf1 Qc5 40.Kg2 hg4 41.h4 Qd5 42.Kg1–+) 38.Kf1 (38.Qc5 Rc5 39.c4 g5–/+) 38...Qf2 (38...Qa3 39.Qc2 Kh8 40.Rd1–+) 39.Kf2 Rb5 40.Rd1 Rb3 41.Rd7 (41.Rd5 Rc3 42.Ra5 Rh3–+) 41...Rc3 42.a4 Rh3 (42...Rc4 43.Kf3–+) 43.Rc7 Ra3 44.Rc4 Kg6 45.Ke2 (45.Rd4 Kg5–+) 45...h5 (45...Kg5!? 46.Rd4–+) 46.gh5 Kh5 (46...Kh6 47.Rd4–+) 47.Rc5 Kg4 48.Rc4? (48.Ra5 f5 49.Ra6–+) 48...Kg3 49.Rc7 (49.Kd2 g5–+) 49...g5 50.Rf7 Ra4 51.Rf6 g4 52.Rd6 Kg2 53.Rd2 (53.Ke3 g3–+) 53...g3 54.Ke3 (54.Rd5 Re4 55.Kd3 Kf3 56.Ra5 g2–+) 54...Kh3 55.Kf3 Ra3 56.Kf4 g2 57.Rd6 (57.Rd1 Rg3–+) 57...g1Q (57...Ra4 58.Kf3 g1Q 59.Rh6 Rh4 60.Rh4 Kh4 61.Kf4 Qd4 62.Kf5 a4 63.Kg6 a3 64.Kf7 Qd7 65.Kf6 a2 66.Ke5 a1Q 67.Ke4 Qad4 68.Kf3 Q7g4) 58.Rh6 Kg2 59.Rg6 Kf2 60.Rg1 Kg1 0–1. Rutz,Marco – Beck,Frederik, GER U18 WSJ–SJB m, 2000.

6.c3 Bd4 7.cd4 Nf6 8.Nf3 0–0 9.Bd3 =.

6.Bd3 Nc6 7.c3 Ne5 8.Nf3 Nd3 9.Qd3 =.

6.Nf3 Nc6 7.Bb5 Bd7 8.c3 Nd4 9.Bd7 Qd7 10.ed4 Qe6 (10...Qe7 11.Qe2=) 11.Qe2 0–0–0 12.Qe6 fe6 13.Nbd2 Re8 14.0–0–0 Nh6 (14...Ne7 15.Ne4=) 15.Rhe1+= Nf7 16.Kc2 e5 17.d5 h6 (17...Ref8 18.Ne4+=) 18.Ne4 Rhf8 19.Re2 (19.h4 Kd7+/–) 19...Nh8 20.c4 Ng6 21.g3 Be7 22.Rd3 Rf7 23.c5 Ref8 24.Nfd2 h5 (24...Kd7 25.h4+/–) 25.Nc4 h4? (better is 25...Kd7+/–) 26.cd6+– cd6 (26...Bf6+–) 27.Ncd6 (27.Ncd6 Bd6 28.Nd6 Kd7 29.Nf7 Rf7 30.a4+–) 1–0. Querol Soro,Sergio (1995) – Armengod Arino,Jose Manuel (1870), Aragon–chT, 2004.

6.Nf3 Nc6 7.c3 Nd4 8.cd4 Ne7 9.Nc3 =.

6.Nf3 Bg4 7.Bb5 (7.c3 Bd4 (7...Nd7 8.Be2 Bd4 9.cd4 Ngf6 10.0–0 0–0=) 8.cd4 Nf6 9.Be2 0–0 10.0–0 a6=) 7...c6 8.Be2 Nh6 (8...c5 9.Bf6 Nf6 10.a3 0–0=) 9.0–0 0–0 10.Nbd2 (10.c4 Nf5=) 10...Nf5 11.c3 Nd4 12.cd4 c5 (12...Bf5 13.Qb3=) 13.bc5+= (worse is 13.dc5 Ba1 14.Qa1 dc5 15.bc5 Qc7+=) 13...dc5 14.Ne4 (worse is 14.dc5 Ba1 15.Qa1 Qc7+=) 14...cd4 White creates threats along the open c–file 15.Nf6 Qf6 16.Qd4 Qd4 17.Nd4 Be2 18.Ne2 Nc6 19.Rab1 b6 20.Rfc1 Ne5 21.Rc7 Rfc8 22.Rbc1 Rc7 23.Rc7 b5 (23...Rd8 24.Nc3=) 24.Rc5+/– Rd8 25.Nd4 g6?? (better is 25...f6+/–) 26.Re5+– b4 (26...Rc8 27.g4 a6 28.Kg2+–) 27.Rb5 Rc8 28.Kf1 Rc6 (28...Rc4+–) 29.Nc6 (29.Nc6 h5 30.Na7+–) 1–0. wesolyPolak (1755) – maplotte, GameColony.com, 2002.

4.d4 Nd7

5.a3 Ngf6=+ 6.Nc3 c6 7.Nh3 h6 8.Be2 0–0 9.f4 e4 10.d5 Qc7 11.Qd4 Re8 12.0–0 Nf8 13.Nf2+/– h5 14.Nfe4+– Bg4 15.Bc4 Bf5? 16.Ng5 Ng4 17.Nb5! Bf6 18.Nc7 Bd4 19.Bd4 Ne3 20.Be3 Re3 21.Na8 Bc2 22.dc6 bc6 23.Bf7 Kh8 24.Rfe1 Rb3 25.Re8 (25.Re8 g6 26.Rf8 Kg7 27.Ne6 Kh7 28.Nac7 Re3 29.Bg8 Kh8 30.Ne8 Re6 31.Be6 Kh7 32.Bg8 Kh6 33.Rf7 g5 34.Rf6 Bg6 35.f5 h4 36.Rg6 Kh5 37.Nf6#) 1–0. pierre – bowez, internet, 2010.

5.de5 de5 6.a3 Ngf6 7.Nf3 e4 8.Ne5 0–0 9.Bc4 Ne5 10.Qd8 Rd8 11.Bb3 Nc6 12.0–0 Bf5 13.Nc3 Bd6 14.Rad1 Ng4 15.h3 Nf6 16.Nd5 Nd5 17.Bd5 Re8 0–1. phildo (1815) – bananamoon (1740), gameknot.com, 2012.

4.d4 e4

5.d5 Bf6 6.Nc3 Qe7 (6...Be5 7.f4 ef3 8.Nf3 Bg4 9.a3 a5=; 6...a6 7.Rb1 Qe7 8.Qd2 Nh6 9.Nge2 Nf5=) 7.Nge2 Bg4 (7...a5 8.ba5 Be5 9.Nd4 Nf6=) 8.h3 Be2 (8...Bh5 9.Qd2 Bg6=) 9.Be2 Nd7 (9...Be5+=) 10.0–0 Bc3 11.Bc3 Ngf6 12.a4 0–0 13.a5 a6 14.Bb2 Ne5 15.c4 Nfd7 16.Qd4 f6? (better is 16...Nf6!?+=) 17.Qe4+– c5 18.dc6 Nc6? (better is 18...bc6 19.Rfd1 Rfe8+–) 19.Qe7 Ne7 20.Rfd1 Ne5 21.Rd6 Rfd8 22.Rad1 Rd6 23.Rd6 N7c6 24.Be5 (24.f4 Ng6 25.Bf3 Rd8 26.Rd8 Nd8+–) 24...fe5 25.Bf3 Rd8 26.Rd8 Nd8 27.Be4 (27.b5 ab5 28.Bd5 Kh8 29.cb5 g6+–) 27...g6 (27...Kh8 28.b5 ab5 29.cb5+–) 28.f4 (better is 28.b5 Ne6+–) 28...ef4 29.ef4 Kg7 (29...Kf7 30.b5 ab5 31.cb5+–) 30.g3 (30.b5!? ab5 31.cb5 Ne6+–) 30...Kf6 31.Kf2 h5 (31...g5 32.Bh7 gf4 33.gf4+–) 32.Ke3 (better is 32.b5 ab5 33.cb5 Ne6+–) 32...g5 33.f5 (33.Kd4 Ne6 34.Kd5 gf4 35.gf4 Nf4 36.Kd6 Nh3 37.Bb7+–) 33...Nc6 (33...h4 34.g4 Ke7+–) 34.Bc6 bc6 35.Ke4 h4 36.gh4 gh4 37.b5! ab5 (37...cb5 38.cb5) 38.cb5 cb5 39.a6 b4 40.a7 b3 41.a8Q 1–0. wesolyPolak (1795) – NN, GameColony.com, 2002.

5.d5 Nf6 6.a3 0–0 (6...a5 7.Nc3 0–0 8.Nge2 ab4 9.ab4 Ra1=) 7.Nc3 a5 8.Nge2 ab4 9.ab4 Ra1=.

5.d5 Nf6 6.Nc3 0–0 7.Nge2 c6 8.Ng3 Qb6 9.a3 a5+=.

5.d5 Nf6 6.Nc3 Na6 7.Ba6+= ba6 8.Qd4 Bb7 9.Ne4 Ne4 (9...Nd5!? 10.Qg7 Rf8 11.Qh7 Nb4+/–) 10.Qe4 Rc8? (better is 10...0–0+/–) 11.Bg7+– Rg8 12.Qh7 Rg7 (12...Kd7 13.Rd1+–) 13.Qg7 Bf6 (13...Bd5 14.Qh8 Bf8 15.Nf3+–) 14.Qg8 Ke7 15.Qd8 Rd8 16.0–0–0 Rh8 17.Nf3 c6 18.h4 Rh6 (18...cd5 19.h5+–) 19.g4 Rh7 20.h5 cd5 21.g5 Bg7 22.Nd4 Kd7 (22...Bc8 23.h6 Bh8 24.a4+–) 23.g6 (23.g6 Rh8 24.Nf5 fg6 25.hg6+–) 1–0. marekt – Mcd, ChessWorld.net, 2003.

5.d5 Nf6 6.Ne2 a5 (6...c6 7.Nbc3 Qb6 8.a3 a5 9.b5 Bg4+=) 7.b5 a4 8.Ng3 c6 9.Bf6 Bf6+=.

4.d4 Bf6

5.Bc4 d5 (better is 5...ed4!? 6.Bd4 A) 6...d5 7.Bb5 (7.Be2 Nc6 8.c3 Nd4 9.cd4 Be7=) 7...c6= 8.Be2 Qd6 9.c3 Ne7=; B) 6...c5 7.Bf6 Nf6 8.bc5 Qa5 9.Nd2 dc5=) 6.de5+= White is in command. 6...dc4 7.ef6 Qd1 8.Kd1 gf6 (8...Nf6 9.Bf6 gf6 10.Ne2+=) 9.Nc3 (9.Nd2 Be6+/–) 9...c6 (9...Be6 10.Kc1+/–) 10.Ne4+/– Ke7 11.Ne2 Nd7 (11...Be6 12.Nf4+/–) 12.Bd4 (12.Kc1 Nh6+/–) 12...h5 (12...Nh6 13.Nd2+/–) 13.g3 (13.Nd2 b5+/–) 13...Rh6 (13...Nh6 14.Nf4+/–) 14.a4 Ne5 (14...a5 15.ba5 Ra5 16.Bc3+–) 15.Bc5 Kd8 16.Nd6 b6 17.f4 (17.Bd4 Ke7 18.Nc8 Rc8+/–) 17...Ng4 (17...bc5!? 18.fe5 Be6 19.bc5 fe5+=) 18.Nf7+– Ke8 19.Nh6 Nf2 (19...N8h6!? 20.Bd4 Nf2 21.Kd2 c5 22.bc5 bc5+/–) 20.Ke1 Nh1 21.Ng8 bc5 22.Kd2 (22.Nf6 Ke7 23.Ne4 cb4+–) 22...Nf2 23.Nf6 The passed pawn on f4 quickly leads to threats 23...Kf7 24.Rf1 Kf6 25.Rf2 cb4 26.e4 c5 27.Ke3 b3 28.cb3 cb3 29.Nc3 Be6 (29...Rb8 30.Rb2+/–) 30.e5 Kf5 31.Ne4 c4? (better is 31...Rb8 32.Rb2 c4+/–) 32.Nd6+– Kg4 (32...Kg6 33.f5 Bf5 34.Rf5+– (worse is 34.Nf5 Rb8 35.Ne7 Kg7+–)) 33.f5 Bd7 (33...b2 34.Rb2 Bf5+–) 34.Rf4 Kh3 35.Kf2 b2 (35...Bf5 36.Rh4) 36.Rh4 1–0. mtrc – Checkmates, internet, 2002.

5.Nd2 Ne7 6.Nc4 e4 7.f3 ef3 8.Nf3 0–0 9.Bd3 Nd5 10.0–0 Bg4 11.e4 Ne7 12.e5 de5 13.de5 Be5?? 14.Be5 f6 15.Bb2 c6 16.Qe1 b5 17.Ne3 Be6 18.Qh4 g6 19.Bf6 Qb6 20.Be7 Qe3 21.Kh1 Rf7 22.Bc5 Nd7 23.Be3 h5 24.Ng5 Rf1 25.Rf1 Kg7 26.Ne6 Kg8 27.Qe7 Ne5 28.Qg7# 1–0. DoubleMint – tasia, Caissa.com, 2004.

5.de5 de5 6.Qd8 Kd8 7.Bc4 Be6 (7...Nc6 8.b5 Nb4 9.Na3+= Ke7 10.c3+=) 8.Be6 fe6 9.Nd2 (9.Nc3 Kc8 10.Nf3+/–) 9...Ne7 (9...Kc8 10.a3+/–) 10.Ngf3 Nd7 11.Rd1 e4 (11...Kc8 12.a3+/–) 12.Bf6 (12.Ne4?! Bb2 13.Nc5 Bc3 14.Ke2 Nd5 15.Nd7 Kd7+=) 12...Nf6 (12...ef3!? 13.Be7 Ke7 14.Nf3 c5 15.bc5 Rac8+/–) 13.Ne4+– Ke8 (13...Kc8 14.Nc5 Ned5 15.a3+–) 14.Nc5 Kf7 (14...Nc6+–) 15.Ne5 Kg8 16.c4 b6 17.Ne6 Ng6 18.f4 Ne5 (18...Rc8 19.b5+–) 19.fe5 Ne8 (19...Kf7 20.Ng5 Kg6 21.ef6 Kg5+–) 20.Rf1 h6 21.Rd7 Rh7 (21...Kh7 22.Nf8 Rf8 23.Rf8 c5+–) 22.Rf8 1–0. mtrh – NN, internet, 2002.

5.Nf3 ed4 6.Bd4 Nd7 (6...Nc6 7.Bb5=) 7.a3 (7.Be2 Bd4 8.ed4 Ngf6=) 7...Nb6 (7...Ne7 8.Bb5 Nf5 9.Bf6 Qf6 10.Nbd2=) 8.c4 (8.Bd3 Bd4 9.Nd4 Qg5+=) 8...a5 9.Nc3 (9.ba5 Nd7=) 9...ab4 10.ab4 Ra1 11.Qa1 Nc4?? (better is 11...Bd4 12.Nd4 Nf6=) 12.Bc4+– Ne7 (12...Bd4 13.Nd4 Nf6+–) 13.Bf6 gf6 14.Ne4 Nf5 (14...Ng8 15.Qd4 Be6+–) 15.Nf6 Kf8 16.Ng5 Be6 (16...Nh6+–) 17.Be6 fe6 18.Ne6 Ke7 19.Nd8 Rd8 20.Nd5 Kf7 21.Qf6 Ke8 (21...Kg8 22.Qg5 Kh8 23.Qd8 Kg7 24.Qg5 Kf7 25.Qf5 Kg8 26.Qe6 Kg7 27.Qf6 Kg8 28.Ne7) 22.Qe6 Kf8 23.Qf5 Kg8 (23...Ke8 24.Qe6 Kf8 25.Qf6 Ke8 26.Qe7) 24.Qe6 Kh8 (24...Kf8 25.Qf6 Ke8 26.Qe7) 25.Qf6 Kg8 26.Ne7 1–0. Janek – Tundja, internet, 2017.

4.Be2 Nf6=+

5.c4 0–0 6.Nf3 Bg4 7.0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 Bg4 6.Be2 0–0 7.0–0).

5.d4 d5 6.a3 e4 7.c4+=.

5.d4 Nbd7 6.de5 (6.Nd2 ed4 7.Bd4 d5=) 6...Ne5 (6...de5 7.a3+=) 7.Be5 (7.Nf3 Nf3 8.Bf3 d5=) 7...de5+= 8.Qd8 Bd8 9.c4 (9.Nf3 e4 10.Nd4 Be7+=) 9...0–0 (9...Be7 10.c5+=) 10.Nf3+= e4 11.Nd4 Be7 12.c5 (12.a3 a5 13.Nb5 c6–/+) 12...c6 (12...a5 13.Nb5 Nd5 14.N1c3 Nc3 15.Nc3–/+) 13.0–0 (13.a3+=) 13...Nd5 (13...a5!?–/+) 14.a3 (14.Nd2 Rd8=) 14...Bf6 15.Nd2 Re8 (15...Nc3 16.Bc4+=) 16.N2b3 (16.Bc4 Bg4=) 16...Be6 (16...Rd8 17.Rfd1+=) 17.Rad1 Nc3 18.Rd2 Ne2 19.Re2 Bc4 20.Rfe1 (20.Rd2!? Bf1 21.Kf1–+) 20...Be2–+ 21.Re2 Bd4 (21...Rad8 22.Rd2–+) 22.Nd4–/+ Rad8 23.Kf1 g6 (23...Kf8 24.Rd2–+) 24.Ke1 (24.Rd2 h6–/+) 24...f5 (24...Re7 25.Rd2 Red7 26.f3–+) 25.g3 (25.Rd2 h6–/+) 25...Kf7 (25...Re7 26.Rd2 Red7 27.h3–+) 26.h4 (26.Rd2 h6–+) 26...Kf6 (26...Re7 27.Rd2–+) 27.Kd2 (27.Rd2 h6–+) 27...h5 (27...h6 28.h5–+) 28.Kc3 a6 (28...g5 29.hg5 Kg5 30.Rd2–+) 29.Rd2 Rd5 30.Kc4 Ra8 (30...Red8 31.a4–+) 31.Rb2 (31.a4 Rad8–+) 31...Ke5 32.Re2 a5 33.f4 ef3 (33...Kf6 34.Rd2–+) 34.Nf3 Kf6 35.e4 fe4 36.Re4 (36.Ng5 ab4 37.Ne4 Kf5 38.ab4 Kg4–/+) 36...ab4 37.ab4 Ra3 38.Nd4 Rg3 39.Re6 (39.b5 g5–+) 39...Kf7 40.Rd6 Rd6 (40...Rg4 41.Rd5 cd5 42.Kd5 Rh4 43.b5–+) 41.cd6 Ke8 (41...Rg4 42.d7 Ke7 43.Kd3–+) 42.Kc5 (42.b5 cb5 43.Kb5 Rh3–+) 42...Kd7 (better is 42...Rc3 43.Kb6 Rc4–+) 43.Kb6? (43.b5 g5–+) 43...Kd6 (better is 43...Rg4!? 44.Nc2–+) 44.Kb7 Rc3 (44...Rg4!? 45.Nc6 Rh4 46.b5–+) 45.b5 Rc5 (45...Rc4!? 46.Nc6 Rh4 47.b6–+) 46.bc6 Kd5 47.c7 Kd4 48.c8Q Rc8 49.Kc8 Ke4 (49...g5 50.hg5 Ke5 51.Kd7–+) 50.Kd7?? (50.Kc7–+) 50...Kf5 51.Kd6 (51.Ke7 g5 52.hg5–+) 51...Kg4 52.Ke5 (52.Kd5 Kh4 53.Ke4 g5–+) 52...Kh4 53.Kf4 (53.Ke6 g5–+) 53...g5 54.Kf3 (54.Kf5 g4–+) 54...Kh3 55.Kf2 Kh2 56.Kf3 g4 57.Kf4 g3 (better is 57...Kh3!? 58.Ke4–+) 58.Kg5 g2 59.Kh5 g1Q 60.Kh4 Qg3 61.Kh5 Kh3 62.Kh6 Kh4 63.Kh7 Kh5 64.Kh8 Qc7 (64...Kg6 65.Kg8 Qb8) 65.Kg8 Kg6 0–1. Meadows,John – White,Kenneth, 27. LERA Thanksgiving, 1993.

5.Nf3 0–0 6.0–0 h6 7.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 0–0 6.Be2 h6 7.0–0).

4.Ne2 Nf6

5.d4 Nbd7+=.

5.f4 =+.

5.h4 Be6 6.d3 (6.d4 Nbd7–/+) 6...a6 (6...Nd5 7.a3–/+) 7.Nd2 (7.g3 Nbd7–/+) 7...Nc6 8.a3 Qd7 (8...Ng4 9.g3+=) 9.f4 (9.d4 ed4 10.Nd4 Nd4 11.Bd4 c5+=) 9...ef4 (9...Ng4 10.e4 f5 11.fe5 Nce5 12.ef5 Bf5 13.Ng3–/+) 10.Nf4+= Bg4 (10...0–0 11.Be2+=) 11.Be2= Be2 12.Qe2 0–0 13.Nf3 (13.0–0 Rae8=) 13...Qg4 (13...d5 14.0–0=) 14.h5 Qg3 15.Kd2 Qg4 (15...Rae8 16.h6 g6 17.Raf1=) 16.Rag1 (16.h6 g6+=) 16...Rad8 (better is 16...h6=) 17.Rh4?? (better is 17.h6 g6 18.c4=) 17...Ne4!–+ 18.de4 Bh4 19.g3 (19.h6 g6–+ (19...gh6 20.Nh4 Qh4 21.Rh1+/–)) 19...Bg5 (19...Bg3?! 20.Qg2 Ne5 21.Ne5 de5 22.Nd3=) 20.Kc1 (20.Nh2 Qd7–+) 20...Rfe8 21.Qg2 Ne5 22.Nd4 (22.Nh2 Qd7–+) 22...Nc4 0–1. Ackermann,Robert (1950) – Giehl,Thomas (2050), It (open) Nuernberg GER, 1999.

4.Nf3 Bf6

5.Bb5 c6 6.Be2 Qb6=.

5.Qc1 b6 6.Be2 Ne7 (6...e4 7.Nd4=) 7.c4 0–0 8.b5 Bb7 9.0–0 a5 10.d4 ed4 11.Bd4 Nd7 12.Nbd2 Ne5 13.Rd1 Bf3 (13...N7g6!?=) 14.Nf3+= (worse is 14.gf3 Nf5=) 14...Nf3 15.Bf3 (worse is 15.gf3 Nf5+=) 15...Bd4 16.Rd4 Rc8 17.Qc2 Qd7 18.Rad1 Rcd8 19.h4 Qf5 20.Be4 (20.Qf5!? Nf5 21.Rf4+/–) 20...Qh5= 21.Bf3 Qg6 (21...Qf5 22.Qf5 Nf5 23.Rf4+/–) 22.Qc3 (22.Qg6 Ng6 23.a3 Rde8+/–) 22...Qf6 23.Qc2 Qg6 24.Qc3 (24.Qg6 Ng6 25.a3 Ne5+/–) 24...Qf6+= 25.Qc2 (25.h5 Rfe8+=) 25...Ng6 (25...Qg6 26.Qg6 Ng6 27.h5+/–) 26.Be4+= h6 27.h5 Ne5 28.Bd5 Qe7 29.Re4 Qf6 30.Rdd4 (30.Rf4 Qg5 31.Qf5 Qf5 32.Rf5 a4+=) 30...Rde8 (30...Qf5 31.Qd1+=) 31.Rf4+= Qd8 32.Qf5 Kh8 33.Be4 g6 34.Qf6 Qf6 35.Rf6 g5? (better is 35...Kg7!? 36.Rf4 gh5+=) 36.Rh6+– Kg7 37.Rh7 Kf6 38.h6 (better is 38.f3!?+–) 38...Rh8+/– 39.Rh8 Rh8 40.h7 Ng6 41.Bd5 (41.Rd5 Ne7 42.Rd2 Kg7+/–) 41...Rh7+= 42.Re4 Rh8 43.g3 Ne7 44.f4 (44.a3!?+=) 44...g4= 45.Bb7 (better is 45.f5!?=) 45...Rh3 46.Re7 (46.Rd4 Nf5 47.Rd3 Ng3–/+) 46...Ke7–+ 47.Kg2 Rh7 (47...Rh8 48.Bd5–+) 48.Bc8–/+ Rg7 49.Bf5 Kf8 50.Kf2 f6 51.Kg2 Ke7 52.e4 d5 (52...Kd8!?–/+) 53.cd5+= Kd6 54.Be6 (54.Kf2 Kc5 55.Ke3 a4+=) 54...Kc5–/+ 55.a4? (better is 55.Kf2–/+) 55...Kb4–+ 56.e5 fe5 57.fe5 Re7 (57...Ka4?! 58.d6 cd6 59.ed6–+) 58.Kf2 Ka4 59.Ke3 Kb5 60.Kf4 Kc5 61.Kg4 a4 62.Kf4 (62.Kf5 a3 63.d6 cd6 64.ed6 Kd6–+) 62...b5 (62...a3 63.d6 cd6 64.Bb3–+) 63.Kf5 (63.Bg8 a3 64.d6 cd6 65.ed6 Kd6–+) 63...b4 (better is 63...a3!? 64.d6 cd6 65.ed6 Kd6 66.Ba2–+) 64.Kf6 a3 (better is 64...Rh7 65.Bf5 Rh8–+) 65.Ke7+= a2 66.d6 cd6 (better is 66...a1Q 67.d7 Qe5=) 67.ed6?? (better is 67.Ba2 de5 68.Bb1=) 67...a1Q–+ 68.d7 Qg7 69.Bf7 Qe5 70.Be6 (70.Kf8 Qg5 71.Ke8 Qe3 72.Kf8–+) 70...Qd6 71.Kf7 Kc6 72.g4 Kc7 (72...b3 73.Bf5–+) 73.g5 Kd8 74.Bf5 Qe7 75.Kg6 b3 76.Kh6 b2 77.g6 Qf8 78.g7 (78.Kg5 Qf5! 79.Kf5 b1Q 80.Kf6 Qa1 81.Kf7 Kd7–+) 78...Qg8 (better is 78...Qf6 79.Kh5 Qf5 80.Kh4 Qh7 81.Kg4 Qg7 82.Kf5 b1Q 83.Kf4 Qd4 84.Kg5 Qbg1 85.Kf5 Qgg4) 79.Kg6 b1Q! 80.Bb1 (80.Bb1 Qe6 Double attack (80...Kd7 Deflection)) 80...Kd7 81.Bf5 (81.Kf6 Qe6 82.Kg5 Qe3 83.Kf5 Qf2 84.Ke4 Qg2 85.Kf4 Qg7–+) 81...Kd6 (81...Ke7 82.Kg5–+) 82.Kh6 (82.Kf6–+) 82...Qg7 (better is 82...Ke5 83.Bh7 Qe6 84.Kh5 Qf7 85.Kh6 Qf4 86.Kh5 Qf3 87.Kh6 Qh1 88.Kg6 Qe4 89.Kg5 Qh7 90.Kg4 Ke4 91.Kg5 Qg7 92.Kh5 Kf5 93.Kh4 Qg4) 83.Kg7= ½–½. Spiegel,Matthias – Pfueller,Volker (1880), Ueckermuende op 6th, 2007.

5.Qc1 Ne7 6.Nc3+=.

5.Nc3 Be6 6.Bb5 c6 7.Be2=.

5.Nc3 Bg4 6.Be2 Nd7 (6...e4 7.Nd4 Bd4 8.Bg4 Bc3 9.Bc3+=) 7.0–0 Ne7 8.Ne4 Ng6 (8...Nd5 9.h3 Bf5 10.Bd3=) 9.Nf6 (9.d4 0–0+=) 9...Nf6 (9...Qf6 10.d4=) 10.h3 (10.d4 e4 11.Nd2 Be2 12.Qe2 Qe7=) 10...Bd7 (10...Bf3 11.Bf3 (worse is 11.gf3 Qd7+=) 11...d5 12.c4=) 11.a4 Qc8 (11...Nd5 12.d4 e4 13.Nd2=) 12.Kh2 (12.d4 e4 13.Nd2 0–0+=) 12...h6 (12...Bc6 13.d4+=) 13.d4 e4 14.Ng1 (14.Nd2 0–0+=) 14...0–0 (14...Nd5 15.Qd2+=) 15.d5+= Qd8 16.Qd4 (16.f3 Re8+=) 16...Qe7 17.Qd2 (17.Qc4 a5+=) 17...Nh7 (17...c5 18.dc6 bc6 19.Rfd1+=) 18.c4+= Rae8 (18...a5 19.f3+=) 19.Bd4+/– White plans c5 19...Ra8 (19...a5 20.c5+=) 20.c5+= f5 (20...Nf6 21.Bc4+=) 21.Rfc1 (21.f3 Nf6+/–) 21...Ne5 (21...f4 22.Bc4+=) 22.b5 (better is 22.a5+/–) 22...Ng4?? (better is 22...Nf6 23.c6 Bc8+=) 23.hg4+– Qh4 24.Nh3 fg4 25.Kg1?? (25.c6 gh3 26.g3 Rf2 27.Kh1 Qg3 28.cd7 Qg2) 25...gh3+= Threatening mate... how? 26.g3 (26.f4 hg2 27.cd6 cd6–/+) 26...Qe7 (better is 26...Qg5 27.cd6 cd6+=) 27.Rf1? (27.a5 Nf6+=) 27...Ng5 (better is 27...dc5!? 28.Bc3 Ng5–+) 28.c6+= bc6 29.bc6 h2 30.Kh2 Bh3 31.Rab1? (31.Rfb1 Rf2 32.Kh1 Bg2 33.Kg1 Nh3 34.Kh2 Bf1 35.Kh1 Be2 36.Qe2 Re2 37.Rb2 Rb2 38.Bb2 Nf2 39.Kg2–+) 31...Bf1–+ 32.Rf1 Nf3 (32...Rf5 33.Qa5–+) 33.Bf3 ef3 (33...Rf3 34.Rb1–+) 34.Rh1 (34.Rb1 Rf5 35.Qa5 Qe4–/+) 34...Rf5 35.Bb2 (35.Qa5 Rh5 36.Kg1 Rh1 37.Kh1 a6–/+) 35...Rh5 36.Kg1 Rh1 37.Kh1 Qf7 (37...Rb8 38.Bd4–+) 38.Qd4 (38.e4 Qh5 39.Kg1 Qh3 40.Bg7 Qg2) 38...Rb8–+ 39.e4 Qh5 (39...Qg6 40.a5–+) 40.Kg1–/+ The mate threat is Qxg7 40...Rb2 0–1. Semenko,Georg(Jurko) (1750) – Gutgesell,Werner (1820), 5sen.BayEM Schney, 1993.

5.c4 (--> 4.c4 Bf6 5.Nf3).

5.d3 e4 6.Nd4? (better is 6.Bf6!? Nf6 7.de4 Ne4 8.Bb5 c6 9.Qd4=) 6...c5–/+ 7.Ne6?? (better is 7.de4 cd4 8.Bd4–/+) 7...Be6–+ 8.Bf6 Qf6 (8...gf6?! 9.bc5 ed3 10.cd6 dc2 11.Bb5 Nc6 12.Bc6 bc6 13.Qc2 Qd6 14.Nc3–+) 9.c3 cb4 10.Qa4 Nc6 11.Qc2 d5 12.de4 de4 13.Bb5 Nge7 14.0–0 0–0 15.a3 (15.Qe4 bc3 16.Bc6 Nc6–+) 15...bc3 (15...Qe5!? 16.Be2–+) 16.Nc3 Qg6 (16...Qe5 17.Rab1–+) 17.Rfd1 (17.Qe4 Bf5 18.Qh4 Rfd8–+) 17...f5 18.Rab1 Ne5 19.Be2 b6 20.Nb5 f4 21.ef4 Rf4 22.Rd6 (22.Qc3 Nf3 23.Kh1 Nh2–+) 22...Raf8 (better is 22...Rf2 23.g3 Raf8–+) 23.Kf1 (23.Nc3–+) 23...Rf2 24.Ke1 Nd3! 25.Kd2 (25.Bd3 Rc2 Pinning (25...Rc2 Deflection; 25...Rg2 Zwischenzug)) 25...Qg5 (25...Re2 26.Kd1 Rf1 27.Ke2 Qg2 28.Ke3 Nf5) 26.Kc3 (26.Kd1 Rf1! 27.Bf1 Rf1 28.Ke2 Qg2 29.Ke3 Nf5) 26...Rc8 0–1. Goldmund,Heike – Losch,Marika, Rostock op, 2009.

5.Be2 e4 6.Nc3. GuestPRVN – GuestXJWP, freechess.org, 2017.

5.Be2 Ne7 6.c4 (6.e4 0–0=) 6...0–0 (6...e4 7.Nd4 c5 8.Nc3 cd4 9.Ne4–/+) 7.0–0 (7.e4 Nbc6 8.a3 Ng6=) 7...Nd7 (7...e4 8.Bf6 ef3 9.Bf3 gf6 10.d4–/+) 8.d3 (8.e4 a5 9.a3 Ng6=) 8...Re8?? (better is 8...e4 9.Nd4 ed3 10.Bd3 c5–+) 9.Qc2 (9.Nc3 Ng6=) 9...Nf8 (9...a5 10.a3=) 10.Nbd2+= g6 (10...a5 11.a3+=) 11.d4 Nd7 (11...ed4 12.Ne4 Nc6 13.Nf6 Qf6 14.b5+=) 12.c5 dc5 13.bc5 ed4 14.Bd4 (14.Ne4 Bg7 15.Bd4 Nc6 16.Bg7 Kg7 17.Qc3 f6+=) 14...Nc6+= 15.Nb3 (15.Bf6 Nf6 16.Bb5 Bd7+=) 15...Qe7 (15...Nd4 16.Nbd4 Qe7=) 16.a3 (16.Bb5 Ndb8+=) 16...Nde5 (16...Nd4!? 17.Nfd4 Nc5 18.Nc5 Bd4 19.ed4 Qe2=) 17.Ne5+= Ne5 18.Rfd1 Bd7 (18...Bf5 19.Qc3=) 19.Na5 (19.Rab1 Rad8=) 19...Bc6 (19...b6 20.Nc4=) 20.Nc6 (20.Rab1 Rab8+/–) 20...bc6 (20...Nc6!? 21.Bf6 Qf6+/–) 21.Rab1 Nd7 22.Bf3 Qe6 (22...Bd4 23.ed4 Qf6 24.Qa4+–) 23.h3 (23.Bf6 Nf6 24.Rb7 Nd5+–) 23...Bd4+/– 24.Rd4 Nf6 (24...Ne5 25.Be2+/–) 25.Rbd1 (25.Rb7 Nd5+–) 25...Reb8 26.Qa4 (26.Qc4 Qc4 27.Rc4 a5+–) 26...Rb5+/– 27.Rd8 Rd8 28.Rd8 Kg7 29.Qd4 (29.Qa7 Qe5 30.g3 Rc5+/–) 29...Qf5 (29...Qe7+=) 30.Bg4 (better is 30.Ra8+/–) 30...Qc5+= 31.Qa4 (31.Qc5 Rc5 32.Rc8 Ng4 33.hg4 Ra5–/+) 31...Rb1 (31...Ra5 32.Qf4–/+) 32.Kh2 (32.Rd1 Qb5 33.Qc2 Rb2+=) 32...Rf1 (32...Qe5 33.g3–/+) 33.Qf4 (33.Rd2 Qe5 (33...Ng4?! 34.Qg4 Qc3 35.Qb4 Qe5 36.g3=) 34.Qf4 Qf4 35.ef4 Ra1–/+) 33...Qc2 34.Bf3 (34.Ra8 h5 35.Qb4 g5–/+ (35...Ng4?! 36.hg4 Rf2 37.Qf8 Kf6 38.Qd8 Ke6 39.Qe8 Kf6 40.Qd8 Ke6 41.Qe8 Kf6 42.Qd8=; 35...hg4?? 36.Qf8 Kh7 37.Qh8)) 34...Rf2 (34...Qf2 35.Qb4 Qg1 36.Kg3 Nh5 37.Bh5 Qe3 38.Bf3 Qg5 39.Kh2 Qd8 40.Bc6–+) 35.Qg3? (better is 35.Ra8–/+) 35...Rf1–+ 36.Bg4?? (36.Qf4–+) 36...Qc1 (36...Ng4?! 37.Qg4 Qf2 38.Qd4 Kh6 39.Qd2–+) 37.Qc7 (37.Bd1–+) 37...Rh1 38.Kg3 Qe1 (38...Qe3 39.Bf3 Ne4 40.Kh4 Qg5) 39.Kf4–+ Rf1 40.Bf3 Qh4 0–1. Hilbert,Stephan J – Russi Roman (2090), FICGS, 2014.

4.Nf3 Nf6

(--> 1.b4 e5 2.Bb2 d6 3.e3 Nf6 4.Nf3 Be7).

5.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3).

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

5.c4 Be6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be6 5.Nf3 Be7).

5.c4 Bf5 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Bf5 5.Nf3 Be7).

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

5.Be2 c6 6.0–0 0–0 (--> 1.b4 e5 2.Bb2 d6 3.e3 Nf6 4.Nf3 Be7 5.Be2 0–0 6.0–0 c6).

4.Nf3 Bg4

5.Be2 Nd7 6.a3 Ngf6 7.d4 e4 8.Nfd2 Be2 9.Qe2 d5 10.c4 c6 11.Nc3 0–0 12.0–0 a6 13.c5 Qc7 14.f3 ef3 15.Nf3 a5 16.b5 b6 17.bc6 Qc6 18.cb6 Rab8 19.Nb5 Qb6 20.a4 Rfc8 21.Rfc1 Ne4 22.Rc2 Nd6 (22...Qe6 23.Rac1 Rc2 24.Rc2–/+) 23.Nd6 Rc2 24.Qc2 Bd6 25.Ba3 Bb4 (25...Ba3 26.Ra3 Qb1 27.Qb1 Rb1 28.Kf2 Rb2 29.Ke1–/+) 26.Rb1 h6 27.Qf5 Qd6 28.Bc1 (28.Bb4 ab4 29.a5 Rb5=) 28...Nb6 29.Ne5 (29.e4!? Qe6 30.Qe6 fe6 31.ed5 ed5 32.Bf4+=) 29...f6–/+ (29...Na4?! 30.Qf7 (worse is 30.Nf7 Qf8 31.Nh6 gh6 32.Qd5 Qf7–+) 30...Kh7 31.Qf5 Kg8 32.Qf7 Kh7 33.Qf5 Kg8 34.Qf7=) 30.Nd3 Na4 31.Qg6 Nc3 32.Rb2 Ne4 33.Ne5?? (better is 33.Rc2–+) 33...fe5 34.Qg4 (34.Qd6 Bd6 35.Rb8 Bb8–+) 34...Nf6 (better is 34...Qc7 35.Qd1 Rc8 36.Rb1–+) 35.Qg3 (35.Qf5 ed4 36.ed4 Re8–+) 35...Re8 (better is 35...Qc7 36.Bd2 Bd2 37.Rb8 Qb8 38.h3 Qb1 39.Kh2 ed4 40.ed4–+) 36.Rc2 Qe6 (36...ed4!? 37.Qd6 Bd6 38.ed4–+) 37.Bb2 e4 38.Rc7 (38.h3 a4–+) 38...Qg4 39.Qf2 Qd1 40.Qf1 Qf1 (40...Qd3 41.Bc3 Qe3 42.Qf2 Qf2 43.Kf2–+) 41.Kf1 Ng4 42.Ke2 Rf8 43.Kd1 Rf1 44.Kc2 Rf2 45.Kb1 Ne3 46.Rd7 Nc4 47.Bc1 Na3 (better is 47...e3 48.Be3 Ne3 49.Rc7–+) 48.Ba3 Ba3 49.Rd5 Bb4 (better is 49...e3!? 50.Ra5 e2 51.Re5–+) 50.Re5 Rg2 51.h4 Re2 52.d5 Rd2 (52...a4!? 53.Re8 Kf7 54.Rb8–+) 53.Re4 Rd5 54.Ka2 Rd3 55.h5 Kf7 56.Rf4 Ke6 57.Rg4 Rh3 58.Rg7 Rh5 59.Kb3 Kf6 60.Rb7 Rh3 61.Ka4 h5 62.Rb6 Ke5 63.Kb5 Kd4 0–1. Pachurka,Roland – Hergeroeder,Klaus, Schleswig Holstein–ch Basis, 2008.

5.Be2 Nd7 6.c4 Ngf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 Nf6 4.e3 Be7 5.Nf3 Bg4 6.Be2 Nbd7).

5.h3 Bh5 6.Be2 Nf6 7.c4 (7.0–0 0–0 8.a3 Nbd7 9.Nc3 c6 10.e4 Bg6 11.d4 Ne4+=) 7...Nbd7 (7...e4 8.g4 ef3 9.Bf3 Bg6 10.Bb7 Nbd7 11.Ba8 Qa8+=) 8.Nc3 0–0 (8...a5 9.a3 ab4 10.ab4 Ra1 11.Ba1 0–0=) 9.Bd3 (9.0–0 d5 10.Nd5 Nd5 11.cd5 Bb4 12.Ne5 Be2 13.Qe2 Ne5 14.Be5 f6+=) 9...a5+= 10.a3 c6 (10...d5 11.cd5 ab4+=) 11.Qb1 (11.Bf5 ab4+=) 11...Bg6 (11...d5!? 12.cd5 cd5+=) 12.Bg6= hg6 13.Nh4 (13.e4 Nb6 14.d3 Qc7=) 13...d5 14.cd5 cd5 15.b5 e4 16.Qa2 (16.0–0 Nc5 17.Qa2 Qd7–/+) 16...Nc5 17.0–0 Nh7 (17...Qd7 18.g4–/+) 18.Ng6+= fg6 19.Nd5 Kh8 20.Nf4 Qe8 21.Bd4 Nf6 (21...Rc8 22.Rac1+=) 22.Rac1 (22.Bc5 Bc5 23.Ne6 Qb5+=) 22...Nfd7 (22...Rc8 23.f3+=) 23.Rc4 (23.f3 ef3 24.Rf3 Kh7=) 23...b6 (23...g5 24.Nd5 Bd6 25.Nc7 Bc7 26.Bc5–+) 24.Nd5 (24.f3 ef3 25.Rf3 g5+=) 24...Qf7 25.Nf4 (25.Rc2 Rac8+=) 25...Bf6 (25...g5 26.Ne2–/+) 26.Bc5 Nc5 27.Qc2 g5 (27...Rad8 28.Rc5 bc5 29.Qe4–/+) 28.Ne2 (28.d4 gf4 29.dc5 f3–/+) 28...Qd7 (28...Be5 29.f3–/+) 29.a4 Rac8 30.Rc1 (30.Ng3 g4–/+) 30...Be5 31.Ng3 (31.Nd4!?–/+) 31...Bg3–+ 32.fg3 Qf5 (32...g4 33.h4–+) 33.g4 (33.Qd1 Kg8 34.g4 Qf2 35.Kh2 Rcd8–+) 33...Qf2 34.Kh1 (34.Kh2 Rcd8 35.Rc5 bc5 36.Qe4 Rfe8–+ (36...Rd2?! 37.Rc5 Qf6 38.Rf5 Qd6 39.Qe5 Qe5 40.Re5–/+)) 34...Rcd8 35.Rd1 (35.Rc5 bc5 36.Rd1 Qe2–+) 35...Qg3 (better is 35...Nd3 36.Rd4 Rd4 37.ed4 Qg3 38.Qd3 Qd3–+) 36.Qc1 (36.Rc5 bc5 37.Qc4–+) 36...Nd3 37.Qb1 Nf2 38.Kg1 Nh3 39.Kh1 Nf2 40.Kg1 Ng4 41.Qe4 Qh2 0–1. Inskip,Nathaniel – Mottart,Florian, Glorney Cup, Aberdeen SCO, 2004.

4.f4 Bf6

5.fe5 de5 6.e4 (6.Nc3 e4 7.Bc4 Qe7 8.Nd5 Qd6 9.Nf6=) 6...Ne7 (6...Nc6 7.a3 a5 8.b5 Nd4 9.Bc4+=) 7.Be2 (7.Bc4 Qd6 8.a3 Nbc6 (8...0–0= 9.Qh5=) 9.Ne2=; 7.Nf3 0–0 8.Be2 Qd6 9.a3=) 7...Nbc6+= 8.b5 (8.Nf3 Nb4 9.d4+=) 8...Nd4 9.Nf3 Ne2 10.Qe2 Ng6 11.g3 (11.0–0 Qd6=) 11...Qe7 (11...h5 12.h4+=) 12.a4 Be6 13.d3 (13.Nc3 Qd6+=) 13...Qd7 14.Ba3 a6 15.c4 (15.ba6 Ra6 16.Nc3 Qc6+=) 15...ab5 16.ab5 Bg4 17.Ra2 Be7 18.0–0 0–0 19.Be7 Qe7 20.Nc3 (20.Ra8 Ra8 21.Nc3 c6+=) 20...Ra2 Black fights for the Initiative 21.Qa2 Qd7 22.Nd5 c6 23.bc6 bc6 Opening the b–file gets Black a lot of play (23...Qc6?! 24.Qb2 f6 25.Rf2=) 24.Nb4 Rb8 25.Qa4? (25.Qa5 Qd6 26.Nc2 Qd3 27.Ne5 Qc2 28.Ng4 Qe4–+) 25...h6 (25...Qd6 26.Nc2 Qd3 27.Qa7–+) 26.Qa3? (26.Qa5 Qd6 27.Nc2 Qd3 28.Ne5 Ne5 (28...Qe4?! 29.Ng4 Qg4 30.Qc7–/+) 29.Qe5 Rb3–+) 26...Bh3 (26...Qb7 27.Na6 Qa7 28.Qc5 Qa6–+) 27.Rd1 f5 28.Rd2 (28.Na6 Ra8 29.Nc5 Ra3 30.Nd7 fe4 31.Nfe5 Bd7 32.Ng6 ed3+=) 28...f4 (28...Rf8 29.Rf2 fe4 30.Ng5 Rf2 31.Kf2 Qd4 32.Ke2 hg5 33.Kd2–+) 29.d4 ed4 30.Nd4?? (30.c5 Qe7 31.gf4 Qe4 32.Rd4 Qb1 33.Kf2 Qf1 34.Ke3 Re8 35.Re4 Re4 36.Ke4–+) 30...fg3 (30...c5 31.Qa5 Rb4 32.Nf3 Rb1 33.Kf2 Rf1 34.Ke2–+) 31.hg3 (31.c5 Qf7 32.hg3 Qf1 33.Kh2 Ne5–+) 31...c5 (31...c5 32.Qa6 Rb4 (32...cb4?! 33.Qg6 Rc8 34.Qa6+=) 33.Qg6 cd4–+) 0–1. Bendit,Kurt – Capps,Carroll, Golden Gate San Francisco, 1956.

5.fe5 Be5 6.d4 Qh4 7.Kd2 Bf6 8.Nf3 Qf2 9.Qe2 =.

5.fe5 Be5 6.Be5 de5 7.Nf3 e4 (7...Bg4 8.Nc3+=) 8.Nd4 Qe7 (8...Qh4 9.g3 Qe7 10.Nc3=) 9.Bc4 (9.a3!?=) 9...Qb4–/+ 10.Qe2 Qb2 (10...Nf6 11.0–0–/+) 11.Qh5+= Be6?? (better is 11...Nh6 12.Qe5 Be6 13.Qb5 Qb5 14.Bb5 Bd7–/+) 12.Be6 (better is 12.Ne6 Qc1 13.Kf2 Qh1 14.Nc7 Kd8 15.Qf7+– (15.Na8?! Nf6 16.Qa5 b6+–)) 12...g6?? (12...Nh6 13.Nb3 c6+–) 13.Qe5 (13.Bf7 Kf7 14.0–0 Nf6 15.Qd5 Kg7+–) 13...f6 (13...Nd7 14.Qh8 0–0–0 15.Bd7 Kd7 16.0–0+–) 14.Qc7 Ne7 15.0–0 Nbc6 (15...f5 16.Nc3 Qb6+–) 16.Rf6 Qc1 17.Kf2 1–0. Wall,Bill – Cub1, internet, 2005.

5.fe5 Be5 6.Be5 de5 7.Qh5 Qe7 8.Nf3 e4 9.Nd4 =+.

5.Nf3 e4 6.Bf6+= Nf6 (worse is 6...gf6 7.Nd4+=) 7.Nd4 0–0 8.Nc3 c5 9.bc5 dc5 10.Nb3 b6 11.Bc4 Bb7 (11...a6 12.Be2+=) 12.Qe2 Qe7 13.0–0 a6 14.a4 Nbd7 15.Rfb1 Rfd8 (better is 15...Rfe8!?+=) 16.Na5+= ba5 17.Rb7 Qd6 18.Rab1 Rab8 19.Ba6 Rb7 20.Rb7 Rb8 21.Rb8 Nb8 22.Bb7 Qe7 (22...Nc6 23.Bc6 Qc6 24.Qb5 Qb5 25.ab5+– (worse is 25.Nb5 Nd5+/–)) 23.Qb5 g6 (23...h6 24.Ba8 Nbd7 25.Qa5+–) 24.Be4 Nbd7 (24...Qd8 25.Bd5!+– (25.Qc5?! Qd2 26.Kf1 Nbd7+–)) 25.Qa5 Qd6 26.Nb5 Qe7 (26...Qe6 27.Bd3+–) 27.Bf3 h5 28.h3 h4 29.Qc7 Qe6 30.Bc6 Nf8 31.Qd6 Qf5 32.d3 g5 33.e4 Qg6 34.f5 (worse is 34.Qc5 gf4 35.e5 N6h7+–) 34...Qg7 (34...Qh6 35.Kf1 g4 36.Ke2+– (worse is 36.Qc5 Qd2 37.Qc3 Qd1 38.Qe1 Qc2+–)) 35.Qc5 (35.e5!? N6h7 36.Qc5 g4 37.hg4 Qg4+–) 35...g4 36.Qe3 (36.Kh1 Nh5 37.c3 Qh6+–) 36...g3 (36...gh3 37.Qh3 Qg5+–) 37.d4 N8h7 (37...N6h7 38.e5 Ng5 39.Nd6+–) 38.e5 Nh5 39.Bf3 (39.Bf3 N5f6 40.ef6 Qf6 41.Be4+–) 1–0. Gottschalk,Siegfried (1905) – Bridges,Paul (1765), Newport op, 2006.

3.e3 Ne7

4.c4 g6 5.Nf3 Bg7 (--> 1.b4 e5 2.Bb2 d6 3.c4 g6 4.e3 Bg7 5.Nf3 Ne7).

4.Nf3= Nbc6 5.b5 Nb4 6.e4=.

4.Nf3 Nd5 5.a3=.

4.Nf3 Bg4 5.h3 Bh5 (5...Be6 6.Nc3=) 6.Nc3 d5 (6...Nd7!?=) 7.g4+/– e4 8.gh5 ef3 9.Qf3 Qd6 (9...Nbc6!?+/–) 10.Nb5+– Qd7 11.Qf4 (11.h6 Rg8 12.Qg3 Nf5 13.Qc7 Nh6+–) 11...Na6+/– 12.Bd3 (12.0–0–0 Rg8+/–) 12...f6 (12...Ng8 13.a3+/–) 13.a3 (13.h6+/–) 13...Nc6 (13...Ng8!?+/–) 14.h6!+– 0–0–0?? (14...gh6 15.Bf6 Deflection) 15.Bf5 1–0. Janek – Kehoe, internet, 2017.

4.c4 Ng6

5.a3 c6 6.Nf3 Nd7 7.Be2 (7.d4 e4 8.Nfd2 f5=) 7...Nf6 8.d4 e4 9.Nfd2 b6 (9...d5 10.Nc3=) 10.Nc3 Bb7 (10...d5!?+=) 11.0–0 d5 12.c5 (12.cd5 cd5 13.f3 a6+/–) 12...b5 (12...Qe7!?=) 13.a4 a6 14.ab5 ab5 15.Ra8 Qa8 16.Nb5 (16.f3 ef3 17.Bf3 Qd8+/–) 16...Qb8?? 17.Nc3+/– Be7 18.b5 cb5 19.Bb5+– Kf8 20.Qe2 Bc8 21.Rb1 h5 22.Bc1 Bg4 23.Qf1 Qb7 24.c6 Qc7 25.Ra1 Ne8?? 26.Ba3 Ba3 27.Ra3 Ke7?? 28.Nd5 (28…Kd8 29.Ra8 Bc8 30.Ne4+–) 1–0. slavisa11 – cap75, Live Game Caissa's Web, 2004.

5.d4 ed4 6.Bd4 Nc6 7.Bc3=.

5.d4 f6 6.d5 Be7 7.h4 f5 (7...0–0 8.h5 Nh8 9.Bd3=) 8.h5 Nf8 9.Nc3 (9.h6 g6=) 9...Nbd7 (9...Nfd7 10.Nf3=) 10.Nf3 h6 (10...a5 11.a3+=) 11.Qc2 Nf6 12.Nh4 N8h7 (12...e4 13.Ne2+=) 13.Ng6 (13.Nf5 0–0+/–) 13...Rg8 14.Bd3 Qd7 (14...a5 15.a3+/–) 15.c5!+/– c6 (15...dc5 16.Ne5 Deflection) 16.Bc4+– (16.Ne7?! Qe7 17.dc6 dc5+/–) 16...Ng5 17.Rd1 (better is 17.dc6 bc6 18.Bg8 Ng8 19.Rd1+– (worse is 19.Ne7 Ne7 20.cd6 Qd6+–)) 17...Nfe4 (17...Qc7+–) 18.dc6 bc6 19.Bg8 1–0. Janek – Tempoh, internet, 2017.

4.Nf3 h6

5.Nc3 a5 6.ba5 Bg4=.

5.Nc3 a5 6.b5 Nd7+=.

5.Bc4 Nec6 6.b5 Nb4? (better is 6...Na5 7.Be2 e4=) 7.a3+/– d5 (7...e4 8.ab4 d5 9.Bb3 ef3 10.Qf3+–) 8.Be2 (8.Bf1 e4 9.Ne5 Nc2 10.Qc2 Bd6+–) 8...e4 9.Ng1 Nc2 (9...Qg5 10.g3+– (10.ab4 Qg2 11.Bf3 ef3 12.Qf3 Qg6+=)) 10.Qc2 Be7 (10...Bd6 11.d3 (11.Bg7?! Qg5 12.Bh8 Qg2+/–) 11...Qg5 12.de4 Qg2 13.Bf3+–) 11.Bg7 Rg8 12.Be5 (better is 12.Qc3+–) 12...f6? (12...Bf6 13.Bc7 Qd7+–) 13.Bc7 Qd7 14.Bh5 Kf8 15.Bf4 Qb5 (15...Kg7 16.Nc3 Qf5+–) 16.Bh6 Rg7 17.Qc8 1–0. Wall,Bill – Nebsite, internet, 2004.

5.d4 e4 6.Nfd2 d5 (6...Bf5 7.c4=) 7.c4 c6 8.b5 (8.Nc3 Be6+=) 8...g6 (8...Be6 9.bc6 Nbc6 10.Nc3=) 9.Qb3 (9.Nc3 Bg7+=) 9...Bg7 10.Nc3 Be6 11.Na4 (11.Ba3 Qd7+=) 11...0–0 (11...Nd7 12.Nc5=) 12.Ba3 (12.Nc5 Bc8+=) 12...cb5 (12...Nd7 13.bc6 bc6 14.Qb7=) 13.cb5 (13.Qb5 Nbc6+=) 13...Re8 (13...Nd7 14.Rc1=) 14.Rc1 (14.Nc5 Bc8=) 14...Nd7 15.Be2 (15.Nc3=) 15...Bf8 (15...Nf5!?=) 16.0–0+= Nb6 (16...Bg7 17.f3+=) 17.Nb6 (17.Nc5 Rb8+/–) 17...ab6 (17...Qb6 18.Bc5 Qa5 19.Rc3+=) 18.f3 f5 (18...ef3 19.Bf3 (worse is 19.gf3 Bh3 20.Rf2 Nf5 21.Bf8 Re3–/+) 19...Bg7 20.Be7 Qe7 21.a4+= (21.Bd5? Bd5 22.Qd5 Qe3 23.Rf2 Bd4 24.Qf7 Kh8–+)) 19.fe4 fe4 20.Rf6 (better is 20.Bb4+/–) 20...Bg7?? (better is 20...Ra3 21.Qa3 Nf5 22.Rf8 Rf8+=) 21.Re6+– Nf5 22.Rg6 (22.Rg6 Kh7 23.Bh5+–; 22.Re8 Qe8 23.Qd5 Kh8+–) 1–0. Mlynek – NN, ZDK–Sarzyna Poland, 1985.

3.e3 f5

4.a3 d5 5.Be5+/– Na6? (better is 5...Nc6!? 6.Bb5 Nf6+/–) 6.c4+– g5?? (6...Nf6 7.Nc3 Bd6 8.Bf6 Qf6+–) 7.Qh5 Kd7 8.Bh8 Bd6 (8...Qe7 9.Nc3 Bg7 10.Nd5+–) 9.Qh7 Ke8 10.Qg8 Kd7 11.Qf7 Kc6 12.Bf6 Qd7 13.Qd5 Kb6 14.Qa5 Kc6 15.Qb5 1–0. b4_player – verte, casual, 2013.

4.a3 e4 5.Qh5 g6 6.Bb5 c6 7.Qh3 (better is 7.Qd1 Nf6 8.Bc4+=) 7...cb5?? (better is 7...f4 8.g4 Nf6+=) 8.Bh8+– Nc6 (8...h6+–) 9.Qh7 Nf6?? (9...Nge7+–) 10.Qg6 Ke7 (10...Kd7 11.Qf5 Kc7 12.Qf6 Be7+–) 11.Bf6 Ke6 12.Bd8 Kd7 13.Bg5 d5 14.Qf5 Kd6 15.Qf8 (15.Qf8 Kc7 16.Nc3+–) 1–0. pereira – guest, internet, 2007.

4.a4 Nf6 5.c4 (5.d4 Nbd7= 6.Nh3 Qe7 7.Be2 d5=) 5...Be6 (5...Be7 6.d4 ed4 7.ed4 0–0+=) 6.Nc3 (6.d4 ed4 7.ed4 Qe7=) 6...Nbd7 (6...Nc6 7.Qb3 (7.b5 Na5 8.d3+=) 7...Be7+=) 7.Nf3= h6 (7...Nb6 8.d3=; 7...c5=) 8.d4 Be7 9.Be2 0–0 10.0–0 (10.d5 Bf7=) 10...e4 (10...a5 11.b5=) 11.Nh4+= Qe8 (better is 11...d5!? 12.Ng6 Re8+=) 12.d5+/– Bf7 13.Nf5 Bg6 (13...a5 14.ba5 Bg6 15.Ne7 Qe7 16.Nb5+/–) 14.Nd4+– Ne5 (better is 14...Bf7+–) 15.Ne6 Qd7 16.Nf8 Rf8 17.Qd4 Bd8 (17...a5 18.ba5 Ra8+–) 18.Qa7 (18.Qa7 Qc8 19.Nb5+–) 1–0. Wall,Bill – Chatrang, internet, 2000.

4.b5 g6 5.Nf3 Qf6 6.a4 Be6 7.Be2 Bh6 8.c4 Nd7 9.Qc1 Ne7 10.d4 Rg8 11.d5 Bf7 12.Nbd2 c6 13.dc6+= bc6 14.0–0 Rb8 15.Qc3 cb5 16.cb5 Nb6? 17.Qc1 Rc8 18.Qb1 Nc4 19.Nc4 Bc4 20.Bc4 Rc4 21.Qd3 Rc5 22.Rac1 Rd5 23.Qc4 Kf7 24.Qb3 Rd8 25.Rc7+– Qe6 26.Rfc1 Bf8?? 27.Ng5 (27.Ng5 Kf6 28.Ne6 Ke6 29.Rd1+–) 1–0. tanto – thorpedo, net–chess.com, 2002.

4.Bb5 c6 5.Be2 Nh6 6.Bh5 g6 7.Be2 Be6 8.a4 Nd7 9.c4 Qe7 10.Nf3 Bg7 11.0–0 Ng4 12.h3 h5 13.Nh2 e4 14.Bg7= Qg7 15.Nc3 Qe5?? 16.Bg4?? hg4–+ 17.f4? gf3 18.Nf3 ef3 19.Qf3 0–0–0 20.d4 Qf6 21.d5? cd5 22.cd5 Bf7 23.Nb5 Kb8 24.Rac1 Ne5 25.Qe2 Bd5 26.e4 Bc6 27.Nd4 fe4 28.Nc6 Nc6 29.Rf6 Nd4 30.Qe4 Nf5 31.Rf5 gf5 32.Qf5 Rhf8 1–0. TIROLOCO – HOUDINI2, Live Game Caissa's Web, 2004.

4.Nc3 d5 5.Qh5 g6 6.Qf3 =.

4.Nc3 Be6 5.d4 Nd7 6.d5 Bf7 7.Bb5 Ngf6 8.Nf3 a6 9.Be2 (better is 9.Ba4!?=) 9...Nb6–/+ d5 seems the pivot of the position 10.0–0 Nbd5 11.Nd5 Nd5 12.a3 Be7 (12...Nb6 13.Qd2–/+) 13.c4+= Nf6 14.Qc2 White intends c5 14...Qd7 15.Rad1 Qc8 16.Ng5 0–0 17.Nf7 Rf7 18.c5 Kh8 19.Bd3 Ng4 20.h3 Nh6 21.f4 ef4 22.ef4 dc5 23.bc5 b6 (23...Qf8!? 24.c6 b6+=) 24.cb6+= cb6 25.Qc8 Rc8 26.Ba6 Ra8 27.Bc4 Rff8 Exerts pressure on the isolated pawn 28.Rd7 Ng8 29.Kh2 Bf6 30.Bf6 Nf6 31.Rb7 Ra3 32.Rb6 Raa8 33.Be6 g6 34.g4 fg4 35.hg4 Rae8 36.Kh3 Rb8 37.Rfb1 (37.Rb8!? Rb8 38.g5+=) 37...Rbd8 (37...Rb6!? 38.Rb6 h5=) 38.R6b4 ½–½. Habel,Kurt (1655) – Gutgesell,Werner (1840), 8sen.BayEM Schney, 1996.

4.Bc4 d5 5.Qh5 g6 6.Bb5 c6 7.Qf3 cb5 8.Be5 –+.

4.Bd3 Nf6 5.Nc3 Be7 6.Nh3 0–0 7.Qe2 e4 8.Bc4 d5 9.Bb3 Bb4 10.0–0 c6 11.a3 Bd6 12.d3 Qc7–+ 13.g3 f4 14.Nf4=+ Bf4 15.ef4 Bg4 16.Qe3 ed3 17.Qd3 Nbd7 18.Ne4 Ne4 19.Qe4 Nc5 20.Bd5? cd5–+ 21.Qd5 Be6 22.Qg2 Rad8 23.Rfe1 Bd5 24.Qh3 Ne4 25.Re2? Qd7 26.Qd7 Rd7 0–1. notloBrooks – bridlingtonbrummie, ChessWorld.net, 2010.

4.d4 Be6 5.d5 Bf7 6.c4 c6 7.Nc3 Nf6 8.f3 cd5 9.cd5= Be7 10.f4 0–0 11.Bc4 Nbd7 12.Nge2 Nb6 13.fe5? de5–+ 14.0–0?? Nc4 15.Bc1 Bb4 16.Rf5 Bc3 17.Nc3 Bd5 18.Nd5 Nd5 19.Rf8–/+ Kf8 (19...Kf8 20.Qf1 Nf4–/+) 0–1. bentengutama (2170) – salas (2035), net–chess.com, 2003.

4.d4 Qe7 5.c4 Nf6 6.a3 ed4 7.Qd4 Nc6 8.Qc3 (8.Qh4 Ne5 9.Nd2 g6 10.Be2 g5 11.Qg3 Rg8=) 8...Ne4 9.Qc2 (9.Qb3 a5 10.Nc3 Nc3 11.Bc3 f4=) 9...f4 10.Bd3 (10.Nc3 Nc3 11.Qc3 fe3=) 10...Bf5 (better is 10...Nf6= 11.e4 a5=) 11.b5 (better is 11.Nh3!? fe3 12.0–0=) 11...Na5 (11...fe3 12.fe3 Qh4 13.Kf1–+) 12.Nc3 Nf2! 13.Bf5 (13.Qf2 Bd3; 13.Kf2 Qe3) 13...Nh1 (13...Qe3 14.Kf1 Nc4+/–) 14.Nd5+= Qh4 15.Kf1 Nc4 (better is 15...Qh2 16.Nc7 Kd8 17.Na8 Ng3 18.Kf2 fe3 19.Kf3 Nf5 20.Qf5 Qh4= (worse is 20...Nc4 21.Rc1 Qh4 22.Nh3+/–)) 16.Nf3+– (16.Nc7 Kd8 17.Bd4 Qh2 (worse is 17...Kc7 18.Qc4 Kd8 19.Nh3+/–) 18.Qc4 Ng3 19.Kf2 Nf5 20.Na8 fe3 21.Kf3 Qg3 22.Ke4 Qg2 23.Kd3 Nd4 24.Qd4 Qd2 25.Ke4 Qd4 26.Kd4 Be7–+) 16...Qf2 (16...Ne3?? 17.Ne3 Qf2 18.Qf2 Nf2 19.Nd5+– (19.Kf2?! fe3 20.Ke3 c5+/–)) 17.Qf2 Nf2 18.Nc7 (18.ef4 Kd8 19.Ng5 c6 20.Ne6 Ke8 21.Ndc7 Ke7 22.Na8 Nb2 23.Kf2 Kf6+–) 18...Kd8 (18...Ke7 19.Na8 Nb2 20.Kf2+/–) 19.Na8 Nb2 20.Kf2 fe3 21.Ke2 g6 22.Be6 (22.Be4 Na4 23.Bb7 Nc3 24.Ke3 Bg7+–) 22...Bg7 (22...Na4+–) 23.Rc1 (23.Ke3 Re8 24.Nd4 Na4+=) 23...Na4 (23...Ke7 24.Nc7 Na4 25.Bg4+–) 24.Rc7 Nc3 (24...Bf6 25.Rd7 (25.Ke3?! Nb6 26.Rb7 Na8+–) 25...Kc8 26.Rf7 (26.Rd6?! Kb8+/–; 26.Ke3?! Nc5 27.Rf7 Ne6 28.Rf6 Re8+=) 26...Kd8 27.Ke3+–) 25.Ke3 (25.Kd3 Bf6 26.Rd7 Kc8+–) 25...Re8 26.Rc8 (better is 26.Rg7!? Re6 27.Kd3 Nd5 28.Rb7 Nf4 29.Kc4 Re4 30.Nd4 Ne2+–) 26...Ke7 27.Re8 Ke8 28.b6 Ke7?! (28...ab6 29.Nb6 Kd8+–) 29.ba7 Nb5 30.Nb6 (better is 30.Bd5!? Na7 31.Bb7 Kd7+–) 30...Na7 31.Nc8 (31.Bc4 Nc6+–) 31...Ke6 32.Na7 Kd5 33.Nb5 Kc5 34.Nbd4 Bh6 (34...Kc4 35.g4+–) 35.Kd3 d5 36.h4 b5 (36...Kd6 37.a4+–) 37.Ng5 Bg5 38.hg5 b4 (38...Kb6 39.Ne6+–) 39.ab4 Kb4 40.Ne6 Kb5 41.Kd4 (41.Nf8 Kc6+–) 41...Kc6 42.Nf8 Kd6 43.Nh7 Ke6 44.g4 Kf7 45.Kd5 Kg7 46.Ke6 Kh7 47.Kf7 Kh8 48.Kg6 Kg8 49.Kh6 Kh8 50.g6 Kg8 51.g7 (51.g7 Kf7 52.Kh7+–) 1–0. Meng,Fanhao (2285) – Lister,Curtis, Western Canadian Open, Richmond CAN, 2004.

4.d4 Qf6 5.de5 de5 6.f4 (6.a3 Be6=) 6...Bd6 (6...Bb4!? 7.Nd2 Nd7–/+) 7.Nf3= Bb4 8.Nbd2 Qb6 9.Qe2?? (better is 9.Be5 Nf6 10.Bd4=) 9...Bd2–+ 10.Nd2 (10.Qd2 Qb2 11.Rd1 Nc6–+) 10...Qb2 11.Rd1 (11.Qb5 Qb5 12.Bb5 Bd7–+) 11...Bd7 (11...Qc2!? 12.Nc4 Qe2 13.Be2 ef4 14.ef4–+) 12.Qc4 (12.Nc4 Qc3 13.Qd2 Qd2 14.Rd2 ef4 15.ef4 Nc6–+) 12...b5 (better is 12...Nc6!? 13.Rb1 Qa3 14.fe5–+) 13.Qc7 Na6?? (better is 13...ef4 14.ef4 Ne7–+) 14.Qb7 Rc8 15.Qa6 Rc2 16.Bd3 (16.Qa7 ef4 17.Bd3 Rc3 18.Qb8 Rc8 19.Qf4 Ne7= (< 19...Qa2 20.Bf5 Bf5 21.Qf5+/–)) 16...Rd2 (16...Rc3!? 17.Qd6 ef4 18.ef4 Qa3 (< 18...Qa2 19.Bb5 Bb5 20.Qe5 Kf7 21.Qc3+=) 19.Qb8 Rc8 20.Qe5 Qe7=+) 17.Rd2= Qc1 18.Kf2?? (18.Rd1 Qe3 19.Be2 ef4+/–) 18...Qh1 (18...Qd2 19.Be2 Nf6 20.Qa7 Ng4 21.Kg3 Qe2 22.Qa8 Kf7 23.Qd5 Kg6–+) 19.Bb5=+ Bb5 20.Qb5 Kf7 21.Qe5?? Nf6–+ 22.Qf5 Re8 23.Rd7 Re7 24.Re7= Ke7 25.Qe5 Kf8 26.Qb8 Kf7 27.Qa7 Kg6 28.Qd4 Qh2 29.a4 Qh4 30.Ke2 Qg4 (31.Kf2 Qf5=+). maxii – darling, Live Game Caissa's Web, 2004.

4.Ne2 Nf6 5.d4 e4 6.d5 Be7 7.Nf4 0–0 8.Bc4 Qe8 9.Nc3 Kh8 (9...a5 10.ba5 Ra5 11.0–0+=) 10.Nb5 Na6 11.Nd4 (11.0–0+=) 11...Bd8 (11...Nb4 12.Nde6 Be6 13.Ne6 Qa4+=) 12.Nfe6 Be6 13.Ne6 (13.de6?! Qg6 14.Ba6 Qg2=) 13...Rf7 14.Ba6 ba6 15.c4 c6 16.Nd8 (16.0–0 a5 17.a3 ab4 18.ab4 cd5 19.Nd8 Rd8 20.Bf6 Rf6 21.Qd5 Qf7+/–) 16...Rd8+= 17.a4 (17.Bf6 Rf6 18.dc6 Qc6+=) 17...Ng4 (17...a5 18.b5 cd5 19.Bf6 Rf6 20.Qd5+=) 18.0–0 Re7 (18...a5 19.b5 cd5 20.Qd5+/–) 19.Qe2 (19.dc6 Qc6 20.h3 Ne5 21.Be5 Re5+=) 19...Rb8 20.Bc3 cd5 21.cd5 Qc8 (21...Qh5 22.h3 Nf6 23.Qh5 Nh5 24.Rac1+/–) 22.Rac1 Rc7 23.Qd2 Qe8 24.h3 Nh6 25.Bd4 (25.a5 Qg6+/–) 25...Rcb7+= 26.Rc6 Rb4 27.Qc3 (27.Ra6 Ra4 28.Ra4 Qa4 29.Ra1+=) 27...Nf7 (better is 27...Qg6!?=) 28.Bg7+/– Kg8 29.Bd4 Ra4 30.Ba7 (30.Rc1 Rab4+/–) 30...Ra8 (30...Rb5 31.Rc8 Kf8 32.Re8 Ke8 33.Qc8 Nd8 34.Bb8+–) 31.Rc7 (31.Bd4 Ra2+/–) 31...Ne5 32.Rb1 (32.Bd4 Rb8+/–) 32...Rc4+= 33.Rc4 Nc4 34.Rb7 Threatening mate: Qg7 34...Ne5 35.Qa3 Qc8 (35...Qd8 36.Qa6 Nd3 37.Qb5+/–) 36.Qa6 f4 37.ef4 Nd3 (37...Qc1!? 38.Qf1 Qf4+/–) 38.Qc6+– (38.Qc6 Nf4 39.Rc7+–) 1–0. Woelfelschneider,Peter – Milde,Lars, CiF, 1990.

4.Nf3 a6 5.c4 Nc6 6.b5 ab5 7.cb5 Nce7 8.Nc3 Nf6 9.Be2 e4 10.Nd4 Bd7 11.Qb3 d5 12.f3 c6 13.fe4 de4 (13...fe4 14.bc6 bc6 15.0–0=) 14.0–0 Rb8 (14...Qb8 15.bc6 bc6 16.Qc2+=) 15.a4 c5 16.Ne6 (16.Bc4 Qb6 17.Bf7 Kd8 18.Ne6 Be6 19.Be6 Qd6+/–) 16...Qb6 (16...Be6 17.Qe6 Qd7 18.Qe5+=) 17.Nf8 Rf8 18.a5 Qd6 19.Qc2 Ng4?? (better is 19...Ra8+/–) 20.Bg4+– fg4 21.Rf8 (better is 21.Ne4!? Rf1 22.Rf1 Qg6+–) 21...Kf8 22.Ne4 Qd5 (22...Qg6 23.Rf1 Kg8 24.Qc4 Be6 25.Qc5+–) 23.Nc5 (better is 23.Rf1 Nf5 24.Nc5 Ke8+–) 23...Bb5 (23...Rc8 24.d4 g3 25.Qh7 gh2 26.Qh2 Bb5 27.e4+–) 24.Qc3 (better is 24.Qh7 Ke8 25.Qh8 Ng8 26.Qg7+–) 24...Nf5 (24...Ke8 25.Qg7 Bc6 26.Qh8 Ng8 27.Qe5 Qe5 28.Be5 Rd8+–) 25.e4 Qc6 (25...Qd4 26.Qd4 Nd4 27.Bd4 Bc6+–) 26.ef5 Qc7 (26...Qh6 27.Qb3 Re8+–) 27.Ne6 1–0. GuestLZZB – JulianA, freechess.org, 2017.

4.Nf3 c6 5.c4 Be6 (5...Nf6 6.Be2=) 6.Be2 Nf6 7.Ng5 Bd7 8.0–0 h6?? (8...Be7 9.d4 0–0 10.de5 de5 11.Qb3+=) 9.Nf3?? (better is 9.Bh5 Ke7 10.Nf7+–) 9...e4 10.Nd4 g5 (10...g6 11.d3+=) 11.Bh5+/– Ke7 12.d3 g4 (better is 12...Qb6 13.Bg6 Qb4+/–) 13.Nd2?? (better is 13.Bg6 Qc8 14.de4 fe4 15.Nc3+–) 13...Nh5 (13...Rg8 14.de4 Nh5 15.ef5+=) 14.Nf5 (better is 14.Nc6 Nc6 15.Bh8 ed3 16.Qb3+=) 14...Kf7 (better is 14...Bf5 15.Bh8 ed3+=) 15.Bh8+/– Bf5 16.de4 Be6 17.f4 Qb6 (17...gf3!? 18.Qf3 Kg8+/–) 18.c5! dc5? (18...Qb4 19.f5 Bd7 20.Qg4 Qd2 21.Qh5 Ke7 22.Qg6+–) 19.bc5?? (better is 19.f5 Kg8 20.fe6+–) 19...Bc5+/– 20.f5 Be3 21.Kh1 Bd7 22.Qg4 Nf6 (22...Kf8 23.Nc4 Qc5 24.Ne3 Qe3 25.Qh5 Qg5+–) 23.Qg7 (better is 23.Qg6 Ke7 24.Bf6 Kd6 25.Qg3 Bf4 26.Qf4 Kc5 27.Qe5 Kb4 28.a4 Qc5 29.Rfb1 Ka5 30.Nb3 Ka6 31.Nc5 Ka5 32.Qc3) 23...Ke8 24.Nc4 (better is 24.Qg6 Kd8 25.Bf6 Kc7 26.Qg3 Bf4 27.Qf4 Kc8 28.Nc4+–) 24...Nh5 (24...Qd4 25.Qg6 (25.Qf6?! Qc4 26.e5 Bd4+–) 25...Ke7 26.Rad1+–) 25.Nd6 (25.Qg8 Ke7 26.f6 Nf6 27.Bf6) 25...Kd8+– 26.Qg8 Kc7 27.Be5 Qa5 28.Nc4 (better is 28.Ne8 Kb6 29.Qb3 Ka6 30.Nc7 Qc7 31.Bc7 b5 32.Qe3 Nf6 33.Bb8 Rb8 34.Qh6 Ne4+–) 28...Qe5 29.Ne5 Bd4 (29...Nf6 30.Qg3 Bg5 31.Nf7 Kc8 32.Nd6 Kd8 33.Nb7 Kc8 34.Nd6 Kd8 35.Rab1+–) 30.Nc4 (better is 30.Nd7 Ba1 31.Ra1 Nd7 32.Qa8 Nhf6+–) 30...Ba1 31.Ra1 c5 (31...b5 32.Ne5 Nf6 33.Qf8 Ne4 34.Nd7 Kd7 35.Re1 Nf2 36.Kg1+–) 32.Qf8 b6 33.Qd6 Kc8 34.Rd1 Ng7 (34...Ba4 35.Rd2 Bb5 36.Qe6 Kc7 37.Ne5+–) 35.Qf8 Ne8 36.Nd6 Kd8 37.Nf7 (better is 37.f6 Kc7 38.Ne8 Kb7+–) 37...Kc7 38.Ne5 a5 39.Qh6 (better is 39.f6 Nf6 40.Qf6 Ra7+–) 39...Ba4 40.Qh7 Kc8 41.Rd5 (better is 41.Qe7 Bd1 42.Qe8 Kb7 43.f6+–) 41...Nc6 (41...Nc7 42.f6 Kb7+–) 42.Qd7 Kb8 43.Qe8 (43.Nc6 Bc6 44.Qc6 Ka7 45.Rd7 Nc7 46.Rc7 Ka6 47.a4 Rd8 48.Qb5) 43...Ka7 44.Nc6 (44.Rd7 Ka6 45.Qa8 Kb5 46.Qc6 Ka6 47.Qa4 b5 48.Rd6 Kb7 49.Qb5 Kc8 50.Rd7 c4 51.Qb7) 44...Bc6 45.Qc6 Rb8 (45...Re8 46.Rd7 Ka6 47.a4 Re4 48.Qb5) 46.Qb5 (46.Rd7 Ka6 47.a4 c4 48.Qb5) 46...Rb7+– 47.Rd8 c4 48.f6 c3 49.Qc4 c2 50.Qc2 Rf7 (50...Ka6 51.f7! Rc7 52.Qc7 Kb5 53.Rd5 Ka6 54.Qc8 Ka7 55.Rd7) 51.e5 (51.Qc8 b5 52.Qb8 Ka6 53.Rd6) 51...Ka6 (51...Rb7 52.Qc8 b5 53.Qc5 Rb6 54.Qc7 Ka6 55.Ra8) 52.Qc4 Ka7 53.Qb5 (53.Qf7 Ka6 54.a4 b5 55.Rd6) 53...Rb7 54.e6 Rc7 55.h3 (55.Rd7 Kb7 56.f7 Rd7 57.Qd7 Ka6 58.f8Q b5 59.Qfd6) 55...Rc1 56.Kh2 Rc7 (56...Kb7 57.Qd5 Rc6 58.Rd7 Ka6 59.a4 Rc7 60.Qa8 Ra7 61.Qa7) 57.e7 1–0. GuestXZJW – GuestMYLL, freechess.org, 2017.

4.Nf3 g5 5.Bc4 (better is 5.d4 g4 6.Nfd2= Bg7 7.Be2 Be6 8.0–0 Qh4 9.Nc3 Ne7; 5.Ne5 de5 6.Qh5 Ke7 7.Qg5 Nf6 8.Be5 Kf7 9.Bc4 Be6) 5...Nf6 (5...g4 6.Ng1= Bg7 (6...Nc6 7.a3 Bg7 8.d4 ed4 9.Ne2 Qe7; 6...Ne7 7.h3 Bg7 8.hg4 fg4 9.e4 d5) 7.d4 f4 8.Qe2 d5 9.Bb3 ed4; 5...Nc6 6.b5 (6.h4 g4 7.Ng5 d5 8.b5 dc4 9.bc6 Qe7) 6...Na5 7.Ne5 de5 8.Qh5 Kd7 9.Be5 Nc4) 6.0–0 (6.Ng5 d5 7.Be2 h5+– (7...Rg8 8.Bh5 Ke7 9.f4 Rg7) 8.Be5 Nc6 9.Bb2 Nb4) 6...a6? (better is 6...g4 7.Ne1 d5= 8.Be2 Bd6 9.c4 dc4) 7.Ng5+– Qe7 8.f4 d5 (8...Nc6 9.Bf7 Kd8 10.fe5 de5 11.d4 ed4 12.Bd4 (12.ed4? Qe3 13.Kh1 Qg5–+) 12...Nd4 13.Qd4 Qd6 14.Bd5+–) 9.Be2 (9.fe5?! Ng4 10.Bd5 Qg5+=) 9...h6? (better is 9...Rg8 10.Bh5 Kd7+/–) 10.Bh5 (10.fe5?! Ng4 11.Nh3 Bg7+–) 10...Nh5 (10...Kd7 11.Nf7 Rh7 12.Ne5 Kd8 13.Ng6+–) 11.Qh5 Kd7 12.Nf3 (better is 12.Nf7 Rg8 13.Qf5 Qe6 14.Ne5 Kd8 15.Qe6 Be6 16.f5+–) 12...Qb4?? (12...Kd8+–) 13.Ne5 Kd6 (13...Kd8 14.Nf7 Kd7 15.Qf5 Ke7 16.Qf6 Kd7 17.Qh8+–) 14.Qg6 (better is 14.Ba3 Qa3 15.Na3+–) 14...Kc5 (14...Be6 15.Ba3 Qa3 16.Na3+–) 15.Bd4 (better is 15.Nd3 Kb5 16.Nb4 Kb4 17.Bh8 c6+–) 15...Kb5 16.Nd3 (better is 16.Nc3 Ka5 17.Nd5+–) 16...Qd2 (16...Qd4 17.ed4 Bd6 18.Nc3 Kb6 19.Nd5 Ka7 20.Nc7 Bc7 21.Qg7+–) 17.Nc3 (17.a4 Ka5 18.Nd2 Ba3 19.Ra3 Re8 20.Nb3) 17...Ka5+– 18.Qf7 (better is 18.Rf2 Qf2 19.Nf2+–) 18...Bd6 (18...Nd7 19.Rf2 Qf2 20.Nf2 c6+–) 19.Qd5 c5 20.Bc5 (20.Nc5 Qe3 21.Be3 b5 22.Nb3 Kb4 23.Qd4 Ka3 24.Nb1) 20...Qc3+– 21.Bb4 (21.Bd4 b5 22.Bc3 Kb6 23.Qd6 Nc6 24.Bd4 Kb7 25.Nc5 Kb6 26.Ne6 Kb7 27.Qc7) 21...Ka4 22.Bc3 (22.Qa5) 22...Rd8 (22...Bb4 23.Nb2 Ka3 24.Qb3) 23.Qc4 (23.Qa5) 23...Ka3 1–0. Nautiluschess – Gooch, ICS blitz, 2001.

4.Nf3 g6 5.Ng1 Bg7 6.f4 Nf6 7.Be2 (7.Nh3 Nd5+=) 7...Qe7 (7...ef4 8.ef4 0–0 9.Nf3+=) 8.fe5 de5 9.Nf3 (9.a3 Be6+=) 9...Nbd7 (better is 9...e4!? 10.Nd4 Qb4–/+) 10.b5= b6 (10...e4 11.Nd4+=) 11.0–0 Bb7 12.Nc3 0–0–0 13.a4 e4 (13...Qb4!? 14.Ra2 Bf3 15.Rf3 Qa5=) 14.Nd4+= c5?? (better is 14...Ne8 15.a5 Qd6+=) 15.bc6+– Bc6 (15...a6+–) 16.Nc6 Qe6 (16...Qc5 17.Ba6 Kc7 18.Nb5 Kc6 19.Nd4 Kd6+–) 17.Ba6 Kc7 18.Nd4 Nb8 19.Ne6 Kd7 20.Bc4 (20.Bc4 Rc8 21.Bb3+–) 1–0. Janek – Tundja, internet, 2017.

4.f4 Nd7 5.Nf3 ef4 6.ef4 Ngf6 7.Qe2 Qe7 8.Nc3 Qe2 (8...c6 9.b5=) 9.Be2+= a6 10.0–0 Be7 (10...d5 11.a3+=) 11.Rae1+/– 0–0?? (better is 11...Nb6+/–) 12.Bc4+– Rf7 (12...Kh8 13.Re7 Nb6 14.Bb3+–) 13.Re7 (13...d5 14.Rf7 Kf7 15.Nd5 Nd5 16.Bd5 Kf8 17.Re1+–) 1–0. b4_player (2170) – CAFUZO (1665), GameColony.com, 2002.

4.f4 Be6 5.Nf3 =.

4.f4 Qe7 5.Be2 Nf6 6.Nf3 e4 7.Nd4 g6 8.0–0 Bg7 9.Nc3 0–0 10.Bc4 Kh8 11.a4 Bd7 12.b5 c5 13.Nb3 Be6 14.Be6 Qe6 15.Na5 b6 16.Nb3 Nbd7 17.Qe2 d5 18.Nd1 (18.a5 Rfb8=) 18...Rfd8 19.a5 Qd6 20.a6 Rac8 21.Qe1 Ne8 22.Bg7 Kg7 23.Qe2 Nc7 24.Ra4 Nf6 25.Nc3 Ne6 26.Nb1 d4 27.Na3 d3 28.Qd1 0–1. Sijses,Wim – Guilloux,Jean Yves (2065), IECG, 2004.

4.f4 Nf6 5.fe5 (5.Nh3 Be7=) 5...de5 6.Be5 (6.Nf3 Bb4 7.Ne5 Nbd7+=) 6...Bb4 (6...Nc6 7.Bc3 Bb4 8.Bc4+=) 7.Bc4 (7.Nf3 Nc6 8.a3 Ba5+=) 7...Qe7 8.Nf3 Nc6 9.Bf4 (9.Bc3 Ne4+=) 9...Be6–/+ 10.Qe2 Bd6 (better is 10...Nd5!? 11.Bg5 Qd7+=) 11.Be6 Qe6 12.Ng5 Qe7 13.Bd6 Qd6 14.Qc4 (14.Nc3 a6=) 14...Qd5 (14...Ne5 15.Qe6 Qe6 16.Ne6+=) 15.Qd5= Nd5 16.0–0 0–0 17.c4 Nb6 18.Na3 Ne5 19.c5 Nbc4 20.Nc4 Nc4 21.Rf2 g6 22.Nf3 (22.Rb1 b6=) 22...Rfe8 23.Rb1 Rab8 24.Rb4 Ne5 25.Ne5 Re5 26.Ra4 Rc5 27.Ra7 b6 28.d4 Rc1 29.Rf1 Rc2 30.Rf2 Rc1 ½–½. Gundersen,Helge (2160) – Hohler,Peter (2195), Porto POR, Euro Ch, 2014.

4.h3 Nf6 5.Nc3 Be6 (5...Be7 6.Nf3=) 6.Nf3+= Be7 7.d4 e4 8.d5 Bd7 9.Nd4 0–0 10.Bc4 Qe8 11.0–0 a6 (11...Na6 12.b5 Nc5 13.Ba3+=) 12.a3 Qg6 13.Nce2 Nh5 14.Ne6 Be6 15.de6 Nc6 16.Qd2 Ne5 17.Be5 de5 18.Nc3 c6 Black prepares f4 19.Qd7 f4?? (19...b5 20.Be2 Rfe8+/–) 20.Qe7 f3 21.g4 Rf6 (21...b5 22.Bb3 Nf6+–) 22.Rad1 h6 (22...Rff8 23.Qb7 Kh8+–) 23.Rd8 Rd8 24.Qd8 Kh7 25.e7 Nf4 26.Qg8 1–0. pierre – fieuqq, internet, 2010.

4.Nh3 Nf6= 5.f4 e4 6.Be2 d5 7.a3 Bd6 8.0–0 c5 9.c4 cb4 10.cd5 0–0 11.Qb3 ba3 (better is 11...Na6!?+=) 12.Na3+– Nbd7 13.Nb5 Nc5 14.Qc4 b6 15.Na7 Ba6 16.Ra6 (16.Nb5 Qd7+/–) 16...Na6 17.Qa6 Qd7 18.Ra1 Bb8 19.Qc4 Ra7 20.Ra7 Ba7 21.d6 Kh8 22.Ng5 h6 23.Ne6 (23.Bf6 Rf6 24.Qc7 Qc7 25.dc7 Rc6=) 23...Rc8 24.Qb3 (24.Qa2 Rc2 (24...Qd6 25.Bf6 gf6 26.Nd4+/–) 25.Nd4 Rd2–/+) 24...Qd6+= 25.Nd4 (25.Bf6 Rc1 26.Bf1 gf6–/+) 25...b5!–/+ 26.h3 (26.Qb5 Rb8 Decoy; 26.Nb5 Qd5 Double attack (26...Qd2 Pinning; 26...Qd2 Deflection; 26...Qd5 Decoy); 26.Bb5 Bd4 Combination) 26...Bd4–+ 27.Bd4 b4 28.Bc4? (better is 28.g3–+) 28...Qc6?? (better is 28...Nh5–+) 29.Be6+= Qc2?? (29...Rd8 30.Kf2 Rd4 31.ed4 Qd6–/+) 30.Qb4+/– Qd1? (better is 30...Re8!? 31.Bf6 gf6 32.Bf5 Qc7+/–) 31.Kh2+– Ng4?? (31...Re8 32.Bf7 Ng4 33.hg4 Qg4+–) 32.hg4 Qg4 33.Qb1 (better is 33.Bg7 Qg7 34.Bc8+–) 33...Qh4 34.Kg1 Rd8 (34...Rf8+–) 35.Bf5 1–0. Larsen,Bent (2470) – Curatola,Clemente (2155), Maestros vs Olavarria Tandil, 2002. (=1.e3 f5 2.b4 e5 3.Bb2 d6)

4.a3 Be6

5.c4 a5 6.Nf3 =.

5.c4 Nd7 6.d4 ed4 7.Bd4 Ne5 8.Nd2 Ne7 9.Ngf3 N7c6 10.Be2 =.

5.c4 Nd7 6.Nf3 Qe7 7.d3 0–0–0 8.Nc3 e4 (better is 8...Ngf6!?=) 9.de4+/– fe4 10.Ne4 Bg4 11.Ned2 Ne5 12.Be2 Nf6 13.Qa4 a6 14.b5 Ned7? (better is 14...Qe8+–) 15.ba6 ba6 (15...b6 16.Qc6 Nb8 17.Qb7 Kd7+–) 16.Qa6 Kb8 17.Bd4 (better is 17.Nd4 Ne5 18.Nc6 Nc6 19.Bf6+–) 17...Nb6 18.Bb6 cb6 19.Nd4 (better is 19.Qb6 Kc8 20.Rb1 Bf3 21.Nf3+–) 19...Qb7 20.Qb7 Kb7 21.Bg4 Ng4 22.h3 Ne5 23.Ke2 Be7 24.a4 Rc8 25.Rhc1 Bf6 26.a5 Rhe8 (26...ba5 27.Ra5 Nc6 28.Rb1 Kc7 29.Nb5 Kd7 30.Ra3+–) 27.ab6 (better is 27.Ne4 Red8 28.Ne6 (28.Nf6?! gf6 29.ab6 Nc4+–) 28...ba5 29.Nd8 Rd8 30.Ra5+–) 27...Bh4 (27...Nc6 28.Nf5 Nd4 29.Nd4 Bd4+–) 28.g3 (better is 28.Nf5 Rc6 29.Nh4 Rb6+–) 28...Bf6 29.Rab1 (better is 29.Nf5!? Rc6 30.Rcb1 Rd8+–) 29...Nc6 30.Nc6 (30.Nb5!? Nd4 31.Kd3 Nb5 32.Rb5 Rc6+–) 30...Rc6 31.Kd3 Re5 32.Ne4 d5 (32...Rf5 33.Ke2+– (33.Nf6?! Rf6 34.f4 Rb6+–)) 33.cd5 (better is 33.Nf6 dc4 34.Rc4 Rc4+–) 33...Rd5 34.Ke2 (34.Ke2 Rc1 35.Rc1 (35.Nf6? Rc2 36.Kf3 Rf5 37.Ke4 Rf6–+) 35...Kb6 36.Nf6 gf6 37.Rd1+–) 1–0. Fournier,Frederic (1890) – ruyviva, Active, 2011.

5.c4 Nd7 6.Nf3 g6 (6...Nb6 7.Qb3 (7.d3 Be7 8.Be2 Nf6 9.0–0 0–0 10.Qc2=; 7.c5 dc5 8.Ne5 Nf6 9.bc5 Bc5 10.Qf3=; 7.Qc2= Nf6 8.d4 e4 9.d5 Bd7 10.Nd4=) 7...Nf6 8.Be2 e4 9.Nd4 Bd7 10.Nc3=; 6...Qf6 7.Qc2 (7.Qb3 g5 8.d4 g4 9.Nfd2 Bg7 10.d5=) 7...a5 8.Nc3 ab4 9.ab4 Ra1 10.Ba1=) 7.d4+= Bg7 8.Qc2 (8.d5 Bf7 9.Be2 g5 10.Nc3+=) 8...Nh6 (8...c6 9.Be2 Qf6 10.Nc3+=) 9.Nbd2 (9.d5 Bf7 10.Be2+=) 9...0–0 (9...c6 10.Be2=) 10.de5 (10.d5=) 10...de5 11.Rd1 Qe7 12.c5 Nf7 13.Bc4 Rfd8 14.0–0 b6 15.c6 Nf8 16.Qb3 (16.e4 Rd6 17.Rfe1 f4+/–) 16...b5= 17.Be6 Qe6 18.Qe6 Ne6 19.Nb3 g5 20.Nc5 Nc5 21.bc5 Bf6 (21...g4 22.Nh4 Nh6 23.Rd7=) 22.g3 (better is 22.Rd7!?+=) 22...Kf8 23.Rd7 Rd7 24.cd7 c6 25.Rd1 (25.Ne1 Ke7 26.f4 gf4 27.ef4 Kd7 28.fe5 Be5 29.Be5 Ne5 30.Rf5 Nc4+=) 25...Ke7 26.e4 f4 27.g4 Rd8–/+ 28.Bc3 Rd7 29.Rd7 Kd7 30.h3 Ke6–+ 31.Kf1 Be7 32.Bb4 a5! 33.Ba5 Bc5 34.Bb4 Kd6 35.Ke2 Bb4 36.ab4 c5 37.bc5 Kc5 38.Kd3 Kb4 39.Kc2 Kc4 40.Kd2 b4 41.Kc2 b3 42.Kb2 Kd3 43.Ng1 Ke4 44.Kb3 Kd3 45.Kb4 e4 46.Kc5 Ne5 (46...Ne5 47.h4 gh4–+) 0–1. Bernhard,Alfred – Boehm,Ingo, Ruhrgebiet VK Gr1, 1999.

5.d4 ed4 6.Bd4 Nf6 =.

5.Nf3 Nf6 6.c4 Be7 7.d4 e4 8.d5 ef3 (8...Bd7 9.Nd4=) 9.de6+= fg2 10.Bg2 c6 11.Rg1 (11.Ra2 Rf8+=) 11...Qc8= 12.Bh3 (12.b5 Qe6 13.Qa4 Qd7=) 12...g6+= 13.Bf5 (13.Bf1 Qe6 14.Be2 Nbd7+=) 13...gf5 14.Bf6 Bf6 15.Qh5 Kd8 16.Qf7 Be7 (16...Ba1? 17.e7 Kc7 18.e8Q Nd7 19.Qc8 Rac8 20.Qf5+–) 17.Rg7 Do you see the mate threat? 17...Re8 18.Nc3 a5 (18...h5 19.Qf5 Rf8 20.Rf7 Rf7 21.Qf7+=) 19.Rd1 (19.Na4 c5 20.Nb6+–) 19...ab4–/+ 20.c5 bc3 21.cd6 Threatening mate: Rg8 21...c2 (21...Ra3?? 22.Rg8 Qd7 23.ed7 Kd7 24.Qe8 Ke6 25.Qe7) 22.Rg8 cd1Q 23.Kd1 Bf8 (23...Qd7 24.ed7 Kd7 25.Re8 c5 26.Re7 Kc6 27.Rc7 Kb5 28.Qb3 Ka5 29.Rb7 Nd7 30.Qb5) 24.e7 1–0. Wilk,Adam (2015) – Sowa,Bernard, Poland–chT disctrict, 1996.

5.Nf3 Nf6 6.Be2 Nbd7 7.d3 Be7 8.c4 0–0 9.0–0 c6 10.Nbd2 a6 11.e4 f4 (11...h6 12.Nh4 fe4 13.de4=) 12.Qb3 Qc7 13.Qc2 Ne8 14.Rfc1 g5 15.h3 h5 16.Nh2 Ng7 17.Ndf1 Nf6 Black intends g4 18.f3 (18.d4 g4+=) 18...Qd7 (18...Qb6 19.Kh1+=) 19.a4 g4 20.fg4 hg4 21.hg4 Ng4 22.Ng4 Bg4 23.Bg4 Qg4 24.Qd1 Qh4 25.Qf3 Ne6 26.Nh2 Ng5 27.Qf2 Qh7 28.Rf1 Qg7 29.Kh1 Rf6 30.Qg1 Rh6 (30...Kf7 31.g3 Nh3 32.Qg2 Qg3 33.Qg3 fg3 34.Ng4 Rf1 35.Rf1 Nf4 36.Rf3 Rh8 37.Kg1–+) 31.Rf2 (better is 31.Rf4! Qh7 32.Rf2=) 31...Kf7 32.Raf1? (32.Rf4 Ke6 33.g3–+) 32...Rah8 33.g4 (33.Re2 Rh2 34.Qh2 Rh2 35.Kh2–+) 33...Nh3 34.Qg2 (34.Rf4 Ke8 35.Rf8 Rf8 36.Rf8 Qf8 37.Qf1 Nf2 38.Kg1–+) 34...Nf2 35.Rf2 Rh2 36.Qh2 Rh2 37.Rh2 Qg4 38.Rg2 Qh3 39.Kg1 f3 40.Rf2 Qg3 41.Kf1 (41.Kh1 Qf2 42.Be5 Qg2) 41...Bh4 0–1. Fournier,Frederic (1975) – SOBRAS (2360), Echecs21, 2003.

5.c4 Nf6

6.Nc3 a5 7.d4=.

6.Nc3 Be7 7.Nf3 0–0 8.d4 a5 9.de5 de5 10.Qd8 Rd8 11.Nb5+= (worse is 11.Ne5 ab4 12.ab4 Ra1 13.Ba1 Bb4–/+).

6.Nc3 Be7 7.Nf3 0–0 8.Ng5 Bd7 9.Qb3 Kh8 10.c5 d5 11.h4 c6 12.Nf3 (12.Ne2 e4=) 12...Qc7 13.d4 e4 14.Ne5 Ng4 15.Nd7 Nd7 16.Be2 Ndf6 17.Nd1 f4 (better is 17...b6+=) 18.Kd2?? (better is 18.ef4!? Qf4 19.Bc1+=) 18...b6 (18...fe3 19.fe3 Qg3 20.Rg1–+) 19.Kc2 (19.Ke1 fe3 20.Ne3 Qf4 21.Bg4 Ng4 22.Ng4 Qg4–/+) 19...bc5 20.dc5 Rab8 (20...a5 21.ef4 Qf4 22.Qg3 Qg3 23.fg3–/+) 21.Bg4 (better is 21.Qc3!? Bd8 22.ef4 Qf4 23.f3 ef3 24.Qf3=) 21...Ng4–/+ 22.Qc3 (22.f3!? Nf6 23.Qc3–/+) 22...Bf6–+ 23.Qd2 Bb2 24.Kb2 Qe7 (24...fe3!? 25.fe3 Ne5 26.Kc2–+) 25.ef4 Qc5 26.Ka2 Qc4 27.Kb2 (27.Kb1 a5 28.Nb2 Qb5–+) 27...d4 (27...a5 28.Rc1 Qb5 29.Rh3–+) 28.Rc1 Qd5 29.Rc5?? (better is 29.Ka1–+) 29...Qc5 30.Ka1 (30.Re1 Nf6 31.g4 a5–+) 30...Qd5 31.h5 (31.Rh3 c5–+) 31...c5 32.h6 (32.Nc3 Qb3 (32...dc3 33.Qd5 cb4 34.h6 Nh6 35.Rh6 gh6 36.ab4+=) 33.Ne4 Rf4–+) 32...Nh6 33.Ne3 (33.Re1 cb4 34.Ne3 Qb3 35.Qd4 ba3–+) 33...Qb3 (33...de3 34.Qd5 ef2 35.Qc5 Rf4 36.Rf1–+) 34.Nc2 (34.Qb2 Qb2 (34...de3?! 35.Qb3 ef2 36.Qe3–/+) 35.Kb2 de3 36.fe3 cb4–+) 34...d3 35.Ne3 Qa3 36.Qa2 0–1. orangutanb4 (1950) – ahmeti (1680), kurnik, 2011.

6.Nc3 Be7 7.Nf3 Ne4 8.Qc2 (8.d4 Nc3 9.Bc3 e4+=) 8...Nc3= 9.Bc3 Nd7 (9...Bf6!?=) 10.d4+/– e4 (10...0–0 11.de5 de5 12.Ne5 Ne5 13.Be5+/–) 11.d5 ef3 (11...Bf7 12.Nd4 (12.Bg7?! Rg8 13.Nd4 Rg7 14.Nf5 Rg5 15.Qe4 a5=) 12...0–0 13.Nf5+/–) 12.de6 Nf6 13.gf3 (13.Qf5 fg2 14.Bg2 c6+–) 13...g6 14.c5! d5 (14...dc5 15.Rd1 Combination) 15.0–0–0 (15.Rd1 Qc8 16.c6 0–0+/–) 15...c6 16.e4! fe4 (16...de4 17.Rd8 Pinning (17.Rd8 Deflection); 16...fe4 17.fe4 Combination) 17.fe4 0–0 18.ed5 Nd5 19.Rg1 (19.Bd4 Bf6 20.Bc4 Bd4 21.Rd4 Qf6+=) 19...Bg5+= 20.Bd2 (20.f4 Bf4 21.Kb2 Rf6+=) 20...Bd2= 21.Rd2 (21.Qd2 Qf6 22.Bc4 Rae8=) 21...Qf6 22.Qb2 (better is 22.Rg3=) 22...Rae8 (22...Qe6 23.Bc4=) 23.Bc4 (23.Qf6!? Rf6 24.Bc4+/–) 23...Qb2 (23...Qe6 24.Rgd1 Rd8 25.Qb3=) 24.Kb2+= Re6 25.Rgd1 (25.Rg5 Ref6+=) 25...h5 (25...Kg7 26.b5+=) 26.Rd5 (26.b5 Re4 27.Ba2 Kg7+=) 26...cd5 27.Bd5 Rf2 28.Kb3 Rfe2 (28...Kf7 29.h4 Rf4 30.Be6 Ke6 31.Rd6 Ke7 32.Rg6+=) 29.Be6 (worse is 29.Bb7 A) worse is 29...Rh2 30.Bd5 Rhe2 31.c6+– (31.Be6?! Re6 32.Rd7 h4+/–); B) 29...R6e3 30.Ka4 Rh2=) 29...Re6 30.Rd7 b6 (30...b5 31.Ra7 Re3 32.Kc2+–) 31.Ra7 bc5 32.bc5 h4 (32...g5 33.Kc4 Rf6 34.Kb5+–) 33.Kc4 h3 (33...Rf6 34.Kb5 Rf5 35.Kb6+–) 34.Kd3 (better is 34.Kd5 Re2 35.c6 Rh2 36.c7+–) 34...g5 35.Ra4 Kf7 36.Rc4 Ke7 (36...Ra6 37.Rc3+–) 37.Re4 Re4 (37...g4 38.Rg4 Ra6+–) 38.Ke4 Kd7 39.Kf5 Kc6 40.Kg5 1–0. Dillimann,Hans Peter (1715) – Ostertag,Ralph (1820), Afro op, 1998.

6.Nf3 Bd7 7.Be2 (7.d3 a5 8.b5 Be7 9.Be2 0–0 10.0–0=; 7.d4 e4 8.Nfd2 a5 9.b5 Be7 10.Be2=) 7...Be7 8.d4 e4 9.Nfd2 0–0 10.Nc3=.

6.Nf3 Nbd7 7.Nc3 Ne4+=.

6.Nf3 Nbd7 7.d4 a5 A) 8.b5 e4 (8...f4 9.ef4 ef4 10.Bd3 d5 11.c5+/–) 9.d5 Bf7 10.Nd4 g6 11.Be2+=; B) 8.ba5 Ra5 9.Bc3 Ra8 10.de5 de5 11.Ne5+=.

6.Nf3 Nbd7 7.d4 e4 8.d5+= Bg8 (8...Bf7 9.Nd4 Ne5 10.Nf5+=) 9.Nd4+/– g6 10.Nc3 Bg7 11.Nce2 Qe7 (11...Nh5 12.Qb3+=) 12.Nf4 Ne5 (12...Ng4 13.Be2+/–) 13.Qa4 (13.Be2!? 0–0–0+/–) 13...Qd7 14.Qa5 (14.Qc2 0–0–0+/–) 14...c6 (14...a6 15.Nb5 b6 16.Qa4+=) 15.Nfe6 (better is 15.Rd1!?+/–) 15...Be6+= 16.Ne6 b6 (16...Kf7 17.Rd1 Bh6 18.Qc7=) 17.Qa4 (17.Ng7 Kf7 18.Qa4 cd5 19.Qd7 Ned7 20.cd5 Kg7+=) 17...Rc8 (17...Bh6!?+=) 18.Rd1 Bh6? (better is 18...Rg8 19.c5 Nd5 20.Ng7 Rg7+–) 19.Rd2?? (better is 19.c5 b5 20.Qa6+–) 19...cd5= 20.Qd7 Kd7 21.Nf4 g5 (21...Rhf8 22.Be5 de5 23.Nd5 Nd5 24.Rd5 Ke6 25.h4=) 22.Nd5 Nd5 23.Rd5 (23.cd5 Rhd8=) 23...Bg7= 24.Bd4 Ke6 25.Rb5 (25.h4 g4+=) 25...Nc4+= 26.Bg7 Rhg8 27.Bc3? (better is 27.g4!? Rg7 28.gf5 Kf6 29.Bc4 Rc4 30.0–0+=) 27...Na3–+ 28.Bd2 Rc6 29.Be2? (better is 29.g4!? fg4 30.h4–+) 29...a6–+ 30.Rb6?! (30.Rf5 Kf5 31.Ba6–+) 30...Rb6 31.Bc1 (31.h4 g4 32.0–0 Rc8–+) 31...Nc2 32.Kd2 Nb4 33.Ba3 (33.Bb2 Rc8 34.Bc3 Nc2–+) 33...Rc8 34.Bb4 (34.Rb1 Nd5 35.Rc1 Rc1 36.Bc1–+) 34...Rb4 35.Ra1 (35.Rd1 a5 36.Ke1 Rc2–+) 35...Rb2 36.Ke1 Rcc2 37.Ba6 (37.Bf1 Rf2 38.Ra6 f4 39.ef4 gf4 40.Bc4 Kf5 41.Ra5 Kf6–+) 37...Rf2 38.Bf1 (38.Bc4 d5 39.Ra6 Ke5–+) 38...f4 39.Ra4 (39.ef4 gf4 40.Ra3 d5–+) 39...d5 40.Ra6 (40.ef4 gf4 41.Ra5 f3 42.gf3 ef3–+) 40...Ke5 41.ef4 gf4 42.Ra5 e3 43.Ra1 Rfd2 44.Rc1 e2 0–1. Dos Anjos,Diovana F – Do Valle Cardoso,L (1650), 5th SP Open Classico – Grupo C Sub, 2016.

6.Nf3 Nbd7 7.Be2 g6 (7...Nb6 A) 8.d3= Be7 (8...Qe7 9.0–0 e4 10.Nfd2 Qf7 11.de4+=; 8...Nfd7 9.a4 a5 10.ba5 Ra5 11.Bc3=; 8...a5 9.0–0 Be7 10.Ng5 Bd7 11.b5=) 9.0–0 0–0 10.Nc3 Nfd7 11.Nd2=; B) 8.Qc2 Be7 (8...Qd7 9.Ng5 Bg8 10.d4 e4 11.d5+=; 8...a5 9.0–0 ab4 10.ab4 Ra1 11.Ba1+=) 9.d4 e4 10.Ng5 Bd7 11.0–0=; C) 8.Qb3 a5 (8...Qd7 9.Ng5 Bg8 10.d4 Qc6 11.d5=; 8...e4 9.Nd4 Bd7 10.Nc3 Be7 11.0–0+=; 8...Bd7 9.Nc3 e4 10.Nd4 Be7 11.d3=; 8...h6 9.0–0 Be7 10.Nh4 g5 11.Ng6+=; 8...Be7 9.0–0 h6 10.d4 e4 11.Nh4+=; 8...Nfd7 9.0–0 a5 10.d4 e4 11.Nfd2+=) 9.d4 ab4 10.ab4 Ra1 11.Ba1=) 8.Ng5 (8.d4 e4 (8...Qe7 9.de5 de5 10.Ne5 Ne5 11.Be5+=) 9.Ng5 Bg8 10.d5 Bg7 11.0–0+=) 8...Qe7 (8...Bg8 9.0–0 Bg7 10.d4 Qe7 11.Nf3=) 9.0–0 (9.Ne6 Qe6 10.d4 Bg7 11.d5+=) 9...Bh6 (9...Bg8 10.d4 Bg7 11.Nc3=) 10.Ne6 Qe6 11.d4 e4 (11...f4 12.Bc1+=) 12.d5 Qe7 13.Nc3 a6 14.Qa4 b6? (better is 14...0–0!?+=) 15.Nb5+/– Rc8 (15...Kd8 16.Nd4 Ne5 17.c5+–) 16.Na7 (16.Qa6!? 0–0+–) 16...Ra8 17.Qa6 0–0 (17...Kf7 18.a4+–) 18.Nc6 (18.Qb7 Rfb8 19.Nc6 Rb7 20.Ne7 Kf7+–) 18...Qf7 (18...Ra6 19.Ne7 Kf7+–) 19.Qb7 Rac8 20.Na7 Rb8 21.Qc6 (21.Qc7 Ne8 22.Qc6 Bg7 23.Bg7 Qg7+=) 21...Ne8 22.c5 (22.Qb5 Bg7 23.Bg7 Ng7+–) 22...Ne5? (better is 22...bc5 23.Rfb1 cb4 24.ab4 Rb4=) 23.Be5+– Nf6?? (23...de5 24.Bc4 bc5 25.Qc5 Nd6+–) 24.Bf6 (24.Bf6 Qf6 25.Qc7 bc5 26.Nc6+–; 24.cd6!? cd6 25.Qd6 Rbd8 26.Qf6 Qf6 27.Bf6 Rf6+–) 1–0. Trkn – Daniel Zagt, itsyourturn.com, 2001.

6.Nf3 e4 7.Nd4 Bd7 8.Be2 Be7 9.0–0 0–0 10.Nc3=.

6.Nf3 Be7 7.d4 e4 8.d5 Bd7 9.Nd4 0–0 10.Be2+=.

6.Nf3 Be7 7.d4 e4 8.d5 Bf7 9.Nd4 0–0 (9...Qc8!?=) 10.Nf5+/– Nbd7 11.Nd2 Bg6 12.Nd4 Ne5 (better is 12...Qc8!?+/–) 13.Ne6+– Qd7 14.Nf8 Rf8 15.Be5 de5 16.Be2 a5 (16...Bf7 17.g4+–) 17.ba5 Ra8 (17...c6 18.Qb3+–) 18.Qb3 Ra5 (18...Ra7 19.h4+–) 19.Qb7 Ra3 20.0–0 Ra1 21.Ra1 h6 (21...Bd6 22.Ra5 Qe7 23.Nb3+–) 22.Qb8 (22.Ra8 Kf7+–) 22...Kh7 23.Ra8 Ne8 (23...Qe8 24.Qe8 (24.Qc7?! Qa8 25.Qe7 Qa1 26.Nf1 Qe1+=) 24...Ne8 25.Ne4+–) 24.Bd1 Bd6 (24...Qd6 25.Ba4 Qb4 26.Qb4 Bb4 27.Be8 (27.Re8?! Be8 28.Be8 Bd2+–) 27...Be8 28.Re8 Bd2 29.Re5+–) 25.Ba4 Qf5 (25...c6 26.Qb6 Nf6 27.Bc6 Qe7+–) 26.Be8 Be8 27.Qe8 Qg5 (27...h5+–) 28.Ne4 Qg4 29.Nf6! gf6 30.Qh8 Kg6 31.Rg8 Kf5 (31...Kh5 32.Rg4 f5 33.Qe8 Kg4 34.Qg6 Kh4 35.Qh6 Kg4 36.f3) 32.Qh7 Qg6 33.Qg6 1–0. Trkn – guest934, ICC, 2004.

6.Nh3 A) 6...Be7 7.d4 (7.Be2 a5 8.0–0 0–0 9.d4 Ng4 10.Qd2=) 7...ed4 8.Nf4 Bf7 9.ed4 d5 10.c5+=; B) 6...a5 7.b5 (7.d4 ed4 8.ed4 d5 9.Qe2 Qe7 10.Ng5=; 7.Ng5 Bd7 8.b5 Be7 9.d4 Ng4 10.Nh3=) 7...Be7 8.d4 Ng4 9.Be2 0–0 10.0–0=.

4.a3 Be7

5.d4 Be6 6.de5+/– de5 7.Qd8 Bd8 (7...Kd8 8.Be5 Nf6+/–) 8.Be5 Nf6 (8...Bf6+/–) 9.Nf3 0–0 (9...Nbd7 10.Nd4 Bd5 11.Bf4+/–) 10.Nd4+– Bf7 11.Bb5 (11.Nf5 a5+–) 11...c6 (11...Nfd7 12.Bf4+/–) 12.Bd3 Nbd7 (12...g6 13.c4+/–) 13.Bd6+– Re8 14.Bf5 Ne5 (14...Bb6 15.Nf3+–) 15.Nd2 g6 16.Bh3 Nc4 17.Nc4 Bc4 18.0–0–0 Ne4 19.Bg3 a5 20.Bd7 Re7 21.Nc6 bc6 22.Bc6 ab4?? (better is 22...Rc8 23.Bd7 Ng3 24.Bc8 Nh1 25.Rd8 Kf7+/–) 23.Ba8+– Bc7 (23...Ba5 24.Rd4 Ng3 25.hg3+– (25.Rc4?! Nh1 26.ab4 Bb6+/–)) 24.Be4 Re4 25.Bc7 ba3 26.Rd8 Kg7 (26...Kf7 27.Rhd1+–) 27.Rd7 Bf7 (27...Kg8 28.Bf4+–) 28.Ba5 (28.Kd2 a2+–) 28...a2 (28...g5 29.f3 Re8 30.Bc3 Kg6 31.h4+–) 29.Bc3 Kf8 30.Rhd1 (30.Rhd1 Ra4 31.Ba1+–) 1–0. marus – regloh5, internet, 2001.

5.Nf3 g5 6.c4 f4 7.Be2 fe3 8.de3 g4 9.Ng1 h5 10.Nc3 Nf6 11.Qc2 Be6 12.0–0–0 Nbd7 13.f3 Nb6 14.h3 Nc4 15.Bc4 Bc4 16.hg4 h4 (16...a5 17.b5=) 17.Qg6 (17.Ne4 Ne4 18.Qe4 d5 19.Qe5 Rh7+/–) 17...Kd7 (17...Bf7 18.Qc2+=) 18.Nge2 (18.g5 Qg8 19.Qf5 Be6 20.Qe5 Kc8+/–) 18...Rg8 (18...Qg8!? 19.Qg8 Rag8+= (worse is 19...Bg8 20.g5+=)) 19.Qc2 Rh8 (19...Ke8=) 20.e4 (20.g5 Nh5 21.Ne4 Be2 22.Qe2 Ng3 23.Qb5 Kc8+/–) 20...Ng8 (better is 20...Qg8 21.Rd2 Kc8–/+) 21.Nd5+= Bg5? (21...Be2 22.Qe2 Kc8 23.f4+=) 22.Kb1 (better is 22.f4 Bd5 23.ed5+–) 22...Nf6?? (better is 22...Be2 23.Qe2 Kc8+=) 23.Qc4+– Nd5 24.Rd5 (worse is 24.ed5 Rf8+–) 24...c6 25.Rd3 (25.Rd6 Kd6 26.Rd1 Ke7 27.Rd8 Rhd8 28.Qc5 Kd7 29.Qe5 Be7+–) 25...b5 (25...Qe7 26.f4! Bf4 27.Nf4 ef4 28.Bh8 Rh8 29.Qd4+–) 26.Qc2 (better is 26.Qf7 Qe7 27.Qf5 Ke8 28.Qg6 Kf8 29.Qd6 Qd6 30.Rd6 Re8+–) 26...a5 (26...Qe7 27.Qc5 Rh6 28.Be5+–) 27.Rhd1 (27.Be5!? Be7 28.Nd4 Qc7+–) 27...Be7 28.Be5 Rh6 29.Bf4 Re6 (29...Rg6 30.Bd6! Bd6 31.e5+–) 30.Nd4 Rf6 (30...Qc8 31.Ne6 Ke6 32.Bd6+–) 31.Nf5 (31.Qc6) 31...Bf8 (31...Qb6+–) 32.Bd6 Bd6 33.Rd6 Rd6 34.Rd6 Kc7 (34...Ke8 35.Qc6 Kf7 36.Qb7 Qc7 37.Qc7 Kf8 38.Qe7 Kg8 39.Qg7) 35.Rd8 (35.Qc6 Kb8 36.Rd8 Ka7 37.Ra8) 35...Rd8+– 36.ba5 Kb7 37.a6! Ka6 38.Qc6 Ka5 39.Nd6 (39.Qc7 Ka6 40.Qd8 b4 41.Qd6 Ka7 42.Qc7 Ka6 43.Qc6 Ka5 44.Nd6 ba3 45.Qb5) 39...Rd6 40.Qd6 Ka4 41.Qb4 1–0. Fournier,Frederic (1925) – DIAMANTE7000 (1690), Active, 2005.

4.a3 Nf6

5.c4 Nc6 6.d4 ed4 7.ed4 =.

5.c4 Nbd7 6.Nf3 b6 (6...e4 7.Nd4 Ne5 8.f4 ef3 9.gf3=) 7.d4 White launches an attack 7...e4 8.Ng5 Qe7 9.Nc3 (9.d5 Ne5+=) 9...c6 (9...a5 10.d5+=) 10.d5 c5 (10...Ne5!?+=) 11.Nb5 Nb8 12.bc5 (12.Bf6 gf6 13.Qh5 Kd7+–) 12...bc5 13.Qa4 Qd7 (13...Kd7 14.Na7 Kc7 15.Nb5 Kb7+–) 14.Nc7 Kd8 15.Bf6 (better is 15.Qd7!? Bd7 16.Na8 Ke7+–) 15...gf6 16.Nge6 Ke7 17.Qa5 (better is 17.Qb3 f4+–) 17...Bb7 18.Rb1 (worse is 18.Na8 Ba8 19.Rb1 Bh6+–) 18...Bc6 (18...Qc8 19.Na8 Ba8 20.Qa7 Nd7+–) 19.Na8 Ba8 20.Rb8 (20.Rb8 Bg7 21.Ra8 Ra8 22.Ng7+–) 1–0. Pleschke,Helmut – Popp,Tony, IECG, 1999.

5.c4 Be6 6.Nc3 Nbd7 7.Nf3 Be7 8.Ng5 Bf7 (better is 8...Bg8!?=) 9.Nf7+/– Kf7 10.d4 (10.Qf3!?+/–) 10...e4 11.d5 Rf8 12.Ne2 c5 (better is 12...Ng4+=) 13.b5 (13.dc6 bc6 14.Nd4 Ne5 15.Nf5 Qd7 16.Ne7 Qe7+/–) 13...Nb6 (better is 13...Ng4 14.h3 Nde5=) 14.Nf4+/– Re8 15.a4 Kg8 16.a5 Nbd7 17.Be2 g5 (better is 17...Ne5!?+/–) 18.Ne6+– Qc8 19.Ng5 Ne5 20.Be5 de5 21.Ne6 Qd7 22.Bh5 Nh5? 23.Qh5 Kh8 24.Qf5 Rf8 25.Nf8 Qf5–+ 26.Nd7?? Qd7 27.0–0 Qg4 28.g3 Rg8 29.Kg2 Qf3 30.Kg1 h5 31.h3 h4 32.g4 Rg4! 33.hg4 Qg4 34.Kh2–+ h3 35.Rg1 Qf3 36.Raf1?? Bh4 37.d6 Bf2 38.d7 Bg1 39.Rg1 Qf2 40.Kh3 Qf3 41.Rg3 Qf5 42.Kg2 Qd7 43.a6 (43...ba6 44.ba6–+; 43.b6 Qd2 44.Kh3 ab6 45.ab6 Qe2–+) 1–0. slavisa11 – GirlPower11, Live Game Caissa's Web, 2004.

5.c4 Be6 6.Nf3 h6 7.Be2 (7.d4 e4 8.d5 Bd7+=) 7...Be7 8.b5 (8.d4 e4 9.Nh4 d5+=) 8...0–0 9.d3 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 g5 13.Nbd2 g4 14.Nh4 Kh7 15.0–0 (15.g3!?=) 15...Nh5 16.Nf5 Bf5 (worse is 16...Rf5 17.Bg4 Ng7 18.Bf5 Nf5 19.Qe2+/–) 17.Bg4 Bg4 (17...Ng7!? 18.Bf5 Nf5+=) 18.Qg4= Ng7 (18...Nf6 19.Qf5 Kg7 20.f4=) 19.f4 (19.Qe4!? Kh8 20.Qb7+=) 19...Qd7+= 20.Qf3 ef4 21.ef4 (21.Qe4 Nf5 22.Rf4 Bg5+=) 21...c6–/+ 22.Qg3 Nf5 23.Qh3 Bf6 (23...d5 24.bc6 bc6 25.cd5 Bc5 26.Kh1 cd5 27.g4–/+) 24.Ne4 (better is 24.Bf6!? Rf6 25.Ne4+=) 24...Ba1–+ (24...cb5?? 25.Nf6 Rf6 26.Bf6 bc4 27.dc4+–) 25.Ra1 Qg7 (better is 25...cb5 26.Ra8 Qc8–+) 26.Ng5?? (better is 26.Rf1 Kg8 27.Kh1–/+) 26...Kg8–+ 27.Ra7 (27.Re1 hg5 28.fg5 Qg5 29.bc6 bc6 30.Qf3–+) 27...hg5 (27...hg5 28.g4 Qd4 29.Kh1 Qa7 30.gf5 Qf2–+) 0–1. GuestTSFQ – GuestSJQY, freechess.org, 2017.

5.Bc4 d5 6.Bb3 Bd6 7.c4 c6 8.Nf3 Qe7 9.0–0 0–0 10.h3 (10.cd5 cd5 11.Nc3 Be6=) 10...h6 (10...dc4 11.Bc4 Be6 12.Qb3 Bc4 13.Qc4 Kh8 14.d3=) 11.Nc3 Be6 12.cd5 Nd5 13.Ne2 (13.Nd5 Bd5 14.d4 e4=) 13...Nd7+= 14.Rc1 (14.d3 a5 15.e4 fe4 16.de4 Nf4 17.Nf4 Rf4=) 14...Rf6 (14...a5 15.ba5 Ra5 16.Rb1–/+) 15.Ng3 (15.d3 a5=) 15...Rg6 (15...a5 16.e4 fe4 17.Ne4+=) 16.Kh1 (16.b5 Rb8= (worse is 16...Ba3 17.Ba3 Qa3 18.bc6 bc6 19.Rc6+–)) 16...Rf8 17.Qc2 e4 18.Nd4 Bg3 (18...Ne5 19.Ne6 Qe6 20.Be5 Be5 21.Ne2=) 19.Ne6 (19.fg3 Rg5 20.g4 fg4 21.Qe4 (worse is 21.Ne6 Qe6 22.Rf8 Nf8–/+) 21...Rf1 22.Rf1=) 19...Qe6+= 20.fg3 a6 21.Qc4 (21.Kh2 Ne5 22.Be5 Qe5+=) 21...Ne5 22.Ba1?? (better is 22.Be5 Qe5 23.Qc5–/+) 22…Nc4–+ (22...Nc4 23.Bc4 Qd6–+) 0–1. Kostal,Otakar (1945) – Konstacky,Matej (1710), Ostrava op–B, 2003.

5.d3 a5 6.Nf3 +=.

5.d3 Be7 6.Be2 (6.d4 e4=) 6...0–0 7.Nd2 Nbd7 (7...a5 8.Ngf3+=) 8.Ngf3= h6 (8...Qe8 9.0–0=) 9.Nh4 Nh7 (9...Nd5 10.Ng6 Re8 11.c4+=) 10.Ng6+= Rf6 11.Ne7 Qe7 12.g3 (12.d4 Qe6+=) 12...Rf7 (12...Rf8 13.0–0+=) 13.h4 (better is 13.0–0=) 13...g5 (better is 13...Nhf6!?=) 14.d4 (14.hg5 Qg5 15.Nf3 Qf6+/–) 14...Nhf6 (14...ed4 15.Bd4 c5 16.hg5 hg5 17.Bb2+/–) 15.hg5 hg5 16.Nf3 (better is 16.c4+/–) 16...Ng4? (16...g4 17.Ng5 Rg7 18.de5 Ne5 19.Be5 Qe5–/+) 17.Bc4+– Ndf6 (17...ed4 18.Bf7 Qf7 19.Qd4 Nde5 20.Ng5 Qg7+–) 18.de5 Ne4 (18...Ne5 19.Be5 g4+–) 19.ed6 cd6 20.Rh8 1–0. Roibal,Felisardo – Colombo,Alejo, URU–ch prel Roja, 2001.

5.d3 g6 6.c4 Bg7 7.Qc2 (7.Be2 0–0=) 7...0–0 8.Nd2 (8.Nf3 a5=) 8...Nbd7 (8...a5 9.b5=) 9.Ngf3 (9.Be2 a5=) 9...Qe7 (9...Re8 10.Be2=) 10.Be2 h6 (10...e4 11.Nd4=) 11.Nh4 (11.0–0 e4 12.Nd4 a5=) 11...Kh7 12.g3 (12.0–0 c5=) 12...Re8 (12...Qe6 13.0–0=) 13.Rg1 (13.0–0 a5=) 13...Nf8 (better is 13...a5+=) 14.f4? (better is 14.e4+=) 14...ef4–+ 15.gf4 (15.Nf1 Ng4 16.Bg4 fg4–+) 15...Qe3 16.Rg2 (16.Ndf3 Ng4 (16...Qf4?! 17.Bc1 Re3 18.Ng2 Qf3 19.Be3+=) 17.Rg2 Ne6 18.Bg7 Nf4–+ (18...Kg7?! 19.Qc3 Kh7 20.Ng6 Kg6 21.Nh4 Kh7 22.Nf5 Qf4 23.Rg4 Qf5 24.Rg3–+; 18...Ng7?! 19.h3–+)) 16...Qf4 (better is 16...Nh5!? 17.Bg7 Kg7 18.Ndf3 Nf4 19.Kf1–+) 17.Nhf3 b6 (better is 17...a5 18.d4 Qe3–+) 18.0–0–0 Ng4 19.Rg4 (19.Qa4 Bd7 20.Qb3 Ne3–+) 19...Bb2 (19...fg4 20.Ng1–+) 20.Qb2 fg4 21.Ng1 Bf5 (better is 21...Kg8 22.Rf1 Qh2 23.Qf6–+) 22.Qf6 (22.Rf1 Qg5–+ (22...Qh2?! 23.Bg4 Ne6 24.Ngf3–+)) 22...Nd7 (22...Qh2!? 23.Qf7 Kh8 24.Ne4–+) 23.Qf7 Kh8 24.Rf1 (24.Qd5 Qh2 25.Kc2 b5 26.cb5 a6 27.ba6 Ra6 28.Qd4 Qe5–+) 24...Qg5 (24...Qh2!? 25.Qd5–+) 25.Kc2 (25.Kd1 Qe3 26.Qd5 Ne5–+) 25...Re7 (25...Qe3 26.Qd5–+) 26.Qd5 Rae8 27.Ne4 (27.Qd4 Kh7 28.Kd1 Qh4–+) 27...Be4 (better is 27...Re4 28.Kd1 Nf6 29.Rf5 gf5–+) 28.Qg5 hg5 29.de4 Re4 30.Bd3 Rf4 31.Bg6 (31.Rd1–+) 31...Rf1 32.Be8 Nf6 0–1. Paduraru,Cristina Filareta (1655) – Craciun,Paula_Iulia (2150), CN Juniori Voineasa – F20, 2009.

5.d4 Nc6 =.

5.d4 ed4 6.ed4 Be7 7.Nf3 0–0 8.Bd3 Ne4 9.Nbd2 d5 10.0–0 Be6 11.c4 c6 12.Rc1 Bd6 13.cd5 Bd5 14.Ne5 a5 15.b5 Qg5 16.f4 Qh6 17.bc6 Nc6 18.Bc4 Bc4 19.Ndc4 Be5 20.fe5 0–1. Fournier,Frederic (2215) – Elison,Kari (2300), corr ICCF Jubile Gpe B, 2001.

5.Nf3 a5 6.Bb5 c6 7.Be2 =.

5.Nf3 e4 6.Nd4 g6 7.c4 Bg7 8.Qc2 Nc6 (8...0–0 9.c5=) 9.Nc6 bc6 10.d3 Qe7 11.de4 Ne4 12.Bg7 Qg7 13.Ra2 Be6 14.Be2 d5 (14...a5!?=) 15.cd5+/– Bd5 16.Bc4 0–0 17.0–0 Kh8 18.Bd5 cd5 19.Nd2 Rfc8 20.Ne4 fe4 21.Rd1 Qf7 (21...c6 22.Qc5+=) 22.Qc3 Kg8 23.Qd4 (23.Qc6 a5 24.b5 d4+/–) 23...a5 24.b5 Rd8 25.a4 Rd7 26.Rc2 Rad8 (26...h6 27.Qd2+/–) 27.Rdc1 Rf8 28.Qc3 h5 (28...Ra8!?+/–) 29.h3 g5 30.Qa5 g4 31.hg4 hg4 32.Qe1 g3 33.fg3 Qg7 34.Rf2 Rc8 35.Rfc2 Rf7?? (35...Rf8 36.Rc5 Ra8+–) 36.b6!+– Qe5 (36...cb6 37.Rc6 Double attack (37.Rc8 Pinning; 37.Rc8 Deflection; 37.Rc6 Decoy)) 37.a5 Rh7 38.Rc7 Rhc7 39.Rc7 Rc7 40.bc7 Qc7 41.Qb4 (41.Qd2!? Qc6+–) 41...Qc1 42.Kh2 Qe3 43.Qb8 Kg7 44.Qb7 Kh8 45.a6?? (better is 45.Qd5 Qd3 46.Qe5 Kh7 47.Qe6+–) 45...Qh6= 46.Kg1 Qc1 47.Kh2 Qh6 48.Kg1 Qc1 49.Kh2 Qh6 ½–½. Fournier,Frederic (1810) – juankybi (1675), Active, 2011.

5.Nf3 Be6 6.c4 Nbd7 7.d3 Be7 8.Nbd2 (8.Ng5 Bg8+=) 8...h6 9.h4 (9.d4!?+=) 9...0–0= 10.Be2 Ng4 11.g3 Ndf6 12.Nh2 Nh2 13.Rh2 a5 14.b5 Qd7 15.Qc2 f4 (15...c6 16.bc6 bc6 17.f4+=) 16.gf4= ef4 17.0–0–0 fe3 18.fe3 c6 19.bc6 bc6 20.Rg1 d5 21.Rhg2 Rf7 22.c5 Rb8 (22...Qa7 23.Bd4=) 23.Be5 (23.Nf3 Qb7 24.Be5 Rbf8+/–) 23...Rb7 24.d4 (24.Bf4!?+=) 24...Bf5= 25.Bd3 Bd3 26.Qd3 Bf8 (26...Bd8!?=) 27.Qg6 Ne4 28.Ne4 de4 29.Qe4 Qe6 30.Rg6?? (better is 30.Qc2+/–) 30...Qb3 31.d5 (31.Bf6 a4 32.h5–+) 31...Qa3 (better is 31...cd5 32.Qc2 Qe3 33.Kd1 Rf2 34.Rg7 Rg7 35.Bg7 Qf3 36.Kc1 Rc2 37.Kc2 Qe2 38.Kc3 Bg7 39.Rg7 Kg7–+) 32.Kd1 cd5 (better is 32...Qa2 33.R6g2 Rb1 34.Qb1 Qb1 35.Kd2 Rf1 36.Rf1 Qf1–+) 33.Qd5= Rb1 34.Ke2 Rg1 35.Rg1 Qa4 36.Kd3 Qe8 (36...Qb5 37.Ke4 Qb4 (37...Bc5?? 38.Rg7 Kh8 39.Rg6 Kh7 40.Qf7) 38.Kd3 Qh4+–) 37.c6+/– Kh8? (37...Kh7+/–) 38.Bd4?? (better is 38.Rg6 Bc5 39.Bg7 Rg7 40.Rh6 Rh7 41.Rh7 Kh7 42.Qc5 Qd8 43.Qd4+–) 38...Rc7= 39.Qa5 (better is 39.Rc1!? a4 40.Bb6 Qg6 41.e4 Qg3 42.Be3 Qh4 43.Qa5=) 39...Qc6–/+ (39...Rc6?! 40.Qf5=) 40.Qa2 Qb5 41.Ke4 Qe8 (41...Re7!? 42.Kf3 Qf5 43.Ke2 Rc7–+) 42.Kd3+= Qh5 43.Qh2?? (better is 43.Qa4–/+) 43...Qf5 44.e4 Qf3 45.Kd2 (45.Be3 Rd7 46.Kc3 Qe3 47.Kb2 Qa3 48.Kc2 Qd3 49.Kb2 Rb7 50.Ka1 Qc3 51.Qb2 Qb2) 45...Qe4 (45...Bb4 46.Bc3 Bc3 47.Kc1 Qe3 48.Kb1 Rb7 49.Kc2 Rb2 50.Kd1 Qd3 51.Qd2 Qd2) 46.Bg7–+ Rg7 47.Rg7 Bg7 48.Qh3 (48.Qb8 Kh7 49.Qg3 Qb4 50.Ke2–+) 48...h5 (better is 48...Qd4 49.Ke2 Qc4 50.Kf3 h5–+) 49.Qc8= Kh7 50.Qc2 Qc2 51.Kc2 Kg6 52.Kd2 Kf5 53.Ke2 Kg4 54.Kf2 Kh3 55.Kg1 Be5 56.Kh1 Kg3 57.Kg1 Kf3 58.Kh1 Bd4 59.Kh2 Bf2 60.Kh1 ½–½. David,Dorian_Ciprian (1725) – Fulop,Francisc (2090), Slanic Moldova ROM, 1st Div (m), 2011.

5.Nf3 Be6 6.c4 Nbd7 7.Be2 Qe7 8.d3 h6 9.Nbd2 g5 10.h3 g4 11.hg4 fg4 12.Ng1 (12.Ng5 0–0–0=) 12...h5 13.Qc2 Bh6 14.0–0–0 (14.d4!?=) 14...0–0–0 15.g3 Nb6 16.Kb1 Bd7 17.Bf1 Ba4 18.Nb3 Bg5 19.d4 ed4 20.Qf5? (20.Rd4 Nfd7+=) 20...Kb8 (20...Nfd7 21.Ka2 Bc6 22.f3–+) 21.Qg5? (21.Rd4 Nfd7 22.Qc2 Bf6–/+) 21...Bb3?? (better is 21...Qe4 22.Ka2 Qh1–+) 22.Rd4+= Na4?? (22...d5 23.Rf4 Qh7 24.Qf5=) 23.Bd3?? (23.Rf4 Qh7 24.Qf5 Nb2 25.Kb2 Qf5 26.Rf5+–) 23...Qf8?? (better is 23...d5!? 24.Rf4 dc4 25.Bf6 Rd3+=) 24.Ne2?? (better is 24.Rf4!? Nb2 25.Kb2 (25.Rf6?! Nd3 26.Rf8 Rhf8=) 25...Bc4 26.Bc4+–) 24...Nd7 (24...Qe7 25.Re4 Qe4 26.Be4 Ne4 27.Qd5=) 25.Nf4 (25.Rf4 Qg8 26.Qg8 Rhg8+/– (26...Rdg8?? 27.Bh8 Rh8 28.Nd4+–)) 25...c5 (25...Ne5 26.Rh5 Rh5 27.Qh5+=) 26.Re4+= cb4? (26...Nb2 27.Kb2 Ba4 28.b5= (worse is 28.Rh5 Rh5 29.Qh5 Qf6 30.Kb1 Qc3–/+)) 27.ab4 (27.Bh8 Qh8 28.Rd4 ba3 29.Rh5 Qe8 30.Rd6 Nac5+–) 27...Ne5? (27...Nb2 28.Kb2 Ba4 29.Rd4+=) 28.Rh5 (better is 28.Be5 de5 29.Qe5 Ka8 30.Nd5+– (30.Rh5 Qb4 31.Ne2 Bc4 32.Kc1 Qa3 33.Qb2 Qb2 34.Kd1 Qb1 35.Nc1 Nc3 36.Kd2 Qb2 37.Ke1 Qc1)) 28...Nd3?? (better is 28...Rh5 29.Qh5 Nb2 30.Kb2 Bd1+/–) 29.Nd3 (better is 29.Rh8 Qh8 30.Bh8 (30.Nd3? Nb2 31.Nc1 Bc4–+) 30...Rh8 31.Nd3 Nc3 32.Kb2 Ne4 33.Qg4+–) 29...Qf3–+ (29...Nb2 30.Kb2 (30.Nb2?? Qf2 31.Qd8 Rd8–+) 30...Rh5 31.Qh5+/–) 30.Rh8 (30.Qg4 Qg4 31.Rg4 Rh5 32.Rh4 Rh4 33.gh4 Bc4 34.Nf4–+) 30...Qd1 31.Nc1 (31.Bc1 Qc2 32.Ka1 Qa2) 31...Qc2 32.Ka1 Qb2 0–1. Fournier,Frederic (2000) – zacapamuerte (1935), Active, 2004.

5.Nf3 Be6 6.d3 h6 7.Be2 g5 8.Nfd2 Bg7 9.Rf1 0–0 10.f4? (better is 10.c4!?+=) 10...Nd5–+ 11.Kf2? (11.Nc4 gf4 12.ef4 b5–+ (worse is 12...Nf4 13.Bf3–+)) 11...gf4 (better is 11...Ne3 12.Qc1 Nf1 13.Qf1 gf4–+) 12.ef4 Ne3! (worse is 12...Nf4 13.Bf3 c6 14.Kg1–/+) 13.Qc1 (13.Ke3 Decoy to e3 13...ef4 Discovered attack) 13...Nf1 14.Kf1 Nc6 15.Kg1 Qe7 16.Nf3 e4 17.Bg7? (17.Nfd2–+) 17...Qg7 (17...Kg7?! 18.Ne1–+) 18.c3 ef3 19.Bf3 Rae8 20.Nd2 Bf7 21.c4 (21.d4 Re3–+) 21...Re3 22.Qc2 (22.Bc6 bc6 23.Nb3 Rd3 24.Na5–+) 22...Nd4 (better is 22...Qa1 23.Nf1 Nd4 24.Qf2 Nf3 25.gf3 Rd3 26.c5–+) 23.Qd1 Nf3 24.Nf3 Rf3! 25.Ra2 (25.Qf3 A deflection 25...Qa1) 25...Bh5 (better is 25...Qd4 26.Kh1 Rd3 27.Qd3 Qd3 28.Ra1–+) 26.Kh1 Rf2! (26...Rf2 27.Rf2 Bd1–+) 0–1. Herzog,Jana – Strehle,Isabel (2155), GER–chT U20 Girls, 1999.

5.Nf3 g6 6.Bc4 Bg7 7.Bb3 Qe7 (7...e4 8.Nd4 c5 9.Ba4 Kf8 10.bc5 dc5 11.Nb3 c4 12.Nd4 a6 13.Qe2 b5 14.Nb5+=; 7...a5 8.0–0 (8.Ng5 Qe7 9.Bf7 Kd8 10.Bb3 d5 11.0–0 Ng4 12.Nh3 c6 13.ba5 Qc7 14.Re1=) 8...ab4 (8...Qe7 9.b5 a4 10.Ba2 e4 11.Nd4 c5 12.bc6 bc6 13.Nc3 d5 14.Rb1+=) 9.ab4 Ra1 10.Ba1 Qe7 11.d4 e4 12.Nfd2 d5 13.b5 Qd6 14.c4=) 8.d4 e4 9.Ng5 (9.Nfd2 a5 10.0–0 ab4 11.ab4 Ra1 12.Ba1 d5 13.b5 Qd6 14.c4=) 9...h6 10.Nh3 g5 11.Nc3 (11.Qd2 Rf8 12.c4 f4 13.ef4 Bh3 14.gh3=) 11...Be6 (11...c6 12.Ne2 d5 13.c4 f4 14.ef4=) 12.d5 (12.Be6 Qe6 13.d5 Qf7 14.0–0=) 12...Bf7 (12...Bd7 13.Qe2 Kd8 14.Ra2=) 13.Nb5 Qd7 14.c4 (14.Ba4=) 14...0–0 15.Kf1 (15.Nd4 Ng4=) 15...a6 16.Nd4 c5 17.dc6 Nc6 18.Nc6 bc6 19.f4 (19.Bd4 a5+=) 19...Qe7 (19...ef3!? 20.Rb1 a5–+) 20.Nf2 (20.Kg1 g4 21.Nf2 a5+=) 20...c5 (better is 20...gf4 21.ef4 a5–/+) 21.Nd3?? (better is 21.fg5 hg5 22.Ke1=) 21...Ng4–+ 22.Bg7 (22.Qd2 ed3 23.Bg7 Kg7 24.Re1–+) 22...gf4 (22...Ne3 23.Ke1 Nd1 24.Bf8 Rf8 25.Kd2–+) 23.Ra2?? (better is 23.Bf8 Ne3 24.Kg1 Rf8 25.Qe2 ed3 26.Qd3+=) 23...Qb7 (better is 23...Ne3 24.Ke1 Nd1 25.Bf8 Kf8 26.Nf4 Qe5 27.Bd1 Qf4–+) 24.Nf4 (24.Nf4 Ne3 25.Ke1 Nd1 26.Bf8 Rf8 27.Kd1–+) 1–0. Petkov,V (2480) – Kuzubov,Y (2635), 1st League Cent–SRB, 2015. (=1.Nf3 f5 2.b4 d6 3.Bb2 e5 4.e3 Nf6 5.a3)

5.Nf3 h6 6.Nh4 (6.Bc4 Nbd7=) 6...g5+= 7.Ng6 Rg8 8.Nf8 Kf8 (8...Rf8 9.f4=) 9.c4 (9.Bc4 Rg6+/–) 9...Be6 (9...Kg7 10.d4 ed4 11.Qd4+=) 10.d4 e4 (10...ed4!? 11.Qd4 Rg6+=) 11.d5+/– Bf7 12.Be2 Nbd7 13.Nd2 (13.0–0 Ke8+/–) 13...a5 (13...b5 14.Qb3+/–) 14.Nb3 ab4 15.ab4 b6 (15...Ke8!?+/–) 16.Nd4+– f4 17.Ne6 (17.Nc6!? Qe8 18.Ra8 Qa8 19.Qd2+–) 17...Be6+/– 18.de6 (18.Ra8 Qa8 19.de6 Ne5+/–) 18...Ne5 19.Be5 (19.c5 bc5 20.bc5 Ke7+=) 19...de5+= 20.Qd8 (20.Ra8 Qa8 21.h4 Ke7 22.hg5 Rg5+=) 20...Rd8= 21.Ra7 Rg7 (21...Ke7 22.Rc7 Ke6 23.c5 bc5 24.Bc4 (worse is 24.bc5 Rc8 25.Bc4 Nd5 26.Bd5 Kd5 27.Rd7 Kc4–/+) 24...Nd5 25.Rc5+= (worse is 25.bc5 Rc8 26.Bd5 Kd5 27.Rd7 Kc5–/+)) 22.0–0 (22.h4 g4=) 22...Rd2 23.Bd1 (23.Re1 Re7+=) 23...Rd6 (23...Re7 24.Rb7+=) 24.Bb3= Re6 25.Rd1 (25.c5 Re8=) 25...Rd6 (25...c5 26.Ra8 Kf7 27.b5+=) 26.Rd6= cd6 27.Ra8 Ke7 28.Ra7 Nd7 (28...Kf8 29.Ra8 Ke7 30.Ra7 Kf8=) 29.Ba4+= Ke6 30.Bc6 Re7 31.Bd5 ½–½. Lucas,Robert – Ruddell,Craig, WA Class Chpp Rd, 1993.

5.g3 Be7 6.Nf3 0–0 7.Bg2 c6 8.0–0 Be6 9.d3 Nbd7 (9...a5 10.Ng5 Bd7 11.c4+=) 10.Nbd2 h6 11.c4 g5 12.Kh1 Kh7 13.Qc2 Qe8 14.e4 Qg6 15.Ng1 f4 (15...fe4 16.de4 a5 17.Qc3+=) 16.d4 g4 17.f3 (better is 17.gf4!? ef4 18.f3+=) 17...fg3–/+ 18.fg4 (18.Ne2 gh2 19.f4 Bg8+=) 18...gh2 (worse is 18...Qg4 19.h3 Qg6 20.Ne2–/+) 19.Nh3 Ng4 20.d5?? (better is 20.Qb3–+) 20…Ne3 (20...Ne3 21.Ng5 Qg5–+) 0–1. Fournier,Frederic (1970) – drakonian (1940), Echecs21 (6/3), 2003.

5.h3 Be6 (5...a5 6.b5+=) 6.Nf3 Be7 (6...a5 7.ba5 Be7 8.Ng5=) 7.d4 e4 8.Nfd2 (8.Ng5 Bd7 9.d5 0–0=) 8...d5 (8...0–0 9.Be2+=) 9.c4 (9.Be2 0–0+=) 9...c6 (9...a5 10.ba5 Ra5 11.Be2+=) 10.cd5 (10.Be2 0–0=) 10...cd5 (10...Nd5 11.Nc3+=) 11.Be2 0–0 12.0–0 (12.Nb3 b6=) 12...Nbd7 (12...f4 13.ef4 Bd6 14.Nb3+=) 13.Nb3 b6 14.Bb5 (14.Nc3 a6+=) 14...a6 15.Bd7 (15.Be2 Bd6+=) 15...Qd7–/+ 16.N1d2 (16.Nc3 Bd6–/+) 16...g5 (16...f4 17.ef4 Bd6 18.Qe2–/+) 17.Rc1 (17.f4 gf4 18.ef4 Rac8–/+) 17...f4 18.ef4 gf4 19.f3 (19.Re1!?–/+) 19...e3–+ 20.Nb1 Bh3?? (20...Kf7 21.Kh2–/+) 21.Qe2?? (better is 21.gh3 Qh3 22.Rc2=) 21...Bf5–+ 22.Nc3 (22.Rfe1–+) 22...Nh5 23.Qe1 (23.g4 Ng3 24.Qh2 Nf1 25.Kf1 Bd3 26.Ke1 Rac8–+) 23...Ng3 24.Ne2 Nf1 25.Qf1 Bd6 (25...Bh4 26.Nf4 Qd6 27.Nh3–+) 26.Qe1 Qe7 (26...Rac8 27.Qh4 Rc1 28.Nbc1–+) 27.Rc6 (27.Nc3 Qe6–+) 27...Bd3 (27...Rfc8 28.Rc8 Rc8 29.Nc3–+) 28.Rb6 Bc4 (better is 28...Qc7!? 29.Nc5 Be2 30.Rd6 Qd6 31.Qe2–+) 29.Nc5 (29.Na5 Rfc8–+) 29...Rf6 (29...Ra7 30.a4–+) 30.Rb7 Qe8 31.Qh4 The mate threat is Qxh7 31...Qg6 (better is 31...Rf7 32.Ne4 Be7 (32...Rb7?! 33.Nf6 Kf7 34.Ne8 Ke8 35.Nf4–/+; 32...Be2?? 33.Nf6 Kg7 34.Qg5 Kh8 35.Ne8 Rb7 36.Nd6+–; 32...de4?! 33.Qg5 Kf8 34.Qh6 Kg8 35.Qg5 Kf8 36.Qh6 Kg8 37.Qg5=) 33.Qg4 Kh8 34.Nf4 e2–+ (34...de4 35.d5 Rf6 36.Qe6 Qf7 37.Qf7 Rg8 38.Bf6 Bf6 39.Qh7)) 32.Qg4?? (32.Rh7 Be2 33.Rh8 Kg7 34.Ra8 Qb1 35.Bc1 Qc1 36.Kh2+–) 32...Qg4 33.fg4 f3 34.gf3 Rf3 (34...Be2 35.Nd7 Rf3 36.Ne5 Rf1 37.Kg2–+) 35.Ne6 (35.Rd7 Bc5 36.dc5 Be2 37.Rg7 Kf8 38.Rh7–+) 35...Rf2 (35...Be2 36.Rg7 Kh8 37.Rh7 Kh7 38.Ng5 Kg6 39.Ba1 Rg3 40.Kh1 Rh8 41.Nh3 Rhh3) 36.Rg7 Kh8 37.Bc3 (37.Rd7 Bh2 38.Kh1 Re2 39.Ng5–+) 37...Re2 (37...Be2 38.Ng5 Kg7 39.Be1 Rf1 40.Kg2 Re1 41.Ne6 Kf6 42.Nc5 Kg5 43.Nd7 Rf8 44.Ne5 Kh4 45.Ng6 hg6 46.b5 Bf3) 38.Rd7 Bh2 39.Kh1 Bd3 40.Rd5 (40.Nf4 Bf4 41.Re7 Rg8 42.Be1 Re1 43.Kg2 Rg4 44.Kh3 Rg3 45.Kh2 Rg5 46.Kh3 Rh1) 40...Be4 0–1. Chessflower – Doda (2070), Freundschaftspartie, 5m + 0s, 2007.

5.c4 Be7

6.Nc3 0–0 7.Nf3 (7.Be2 Nc6=) 7...c6 (7...e4!? 8.Nd4 c5+=) 8.d3 Nbd7 (8...a5 9.Qb3=) 9.Qb3 (9.Be2 Nb6+=) 9...h6 (9...a5 10.Be2=) 10.Nh4 (10.Be2 Qc7+=) 10...f4 11.e4 Kh7 (11...Ne4 12.c5 Kh7 13.Ne4+= (worse is 13.de4 Bh4 14.cd6 Qb6+=)) 12.Nf5 g6 13.Ne7 Qe7 14.Be2 Rg8 15.Bf3 (15.0–0!?+=) 15...Nf8= 16.Ne2 g5 17.h3 Ng6 18.g3 (18.0–0–0 a5+=) 18...fg3+= 19.fg3 Be6 (19...Bh3 20.Rh3 g4 21.Bg4 Ng4 22.Rh5+=) 20.0–0–0 (20.Bg2 Qg7+=) 20...b5 (20...a5 21.ba5 Ra5 22.Qb4+=) 21.Qc3= White plans c5 21...Rgc8 22.c5 (22.h4 Ng4 23.h5 Nf8=) 22...dc5+= 23.Qc5 Qf7 (23...Qc5 24.bc5 Bh3 25.Rh3=) 24.Qe3 (24.Rdf1 Qf8+=) 24...a5 (24...c5 25.bc5 Rc5 26.Kb1=) 25.d4 ab4 26.ab4 Nd7 27.Rdf1 (27.h4 Bb3 28.Rd3 Bc4+=) 27...Nb6 28.Bh5 Qg7 29.de5 Nc4 30.Bg6 Qg6 (30...Kg6?! 31.Qb3 Bg8 32.Rf6 Kh7 33.e6 Nb2 34.Qb2 Be6 35.e5=) 31.Qf3 (better is 31.Qc5!? Nb2 32.Qe7 Kh8 33.Rf6+=) 31...Nb2–+ 32.Kb2 Ra2 33.Kb1 Rca8 34.Nc3 R2a3 35.Kc2 Bb3 36.Kd2 (36.Kb2 Be6 37.Kc2 Qg7=) 36...Rd8+= 37.Ke1?? (better is 37.Kc1 Be6 38.Kc2+=) 37...Bc4–+ 38.Qf6 Ra1 39.Kf2 Rd2 40.Kg1 (40.Ke3 Rd3 41.Kf2 Ra2 42.Na2 Qe4 43.Qe7 Kg8 44.Qe8 Kg7 45.Qe7 Bf7 46.Qf6 Kg8 47.Qf7 Kf7 48.Rh2 Rf3 49.Kg1 Rf1 50.Kf1 Qb1 51.Nc1 Qc1 52.Kg2 Qd2 53.Kh1 Qe1 54.Kg2 Qb4 55.Kf3 Qb3 56.Ke4 Qg3 57.Rd2–+) 40...Rf1 0–1. David,D2 (1725) – Scripcaru,George_Daniel (1905), Sarata Monteoru ROM, Men Ch, 2012.

6.d4 ed4 7.ed4 0–0 8.Bd3 =.

6.d4 ed4 7.ed4 d5 8.Nf3 0–0 9.Bd3 a5 10.b5=.

6.d4 ed4 7.ed4 d5 8.Nf3 0–0 9.Bd3 Be6 10.Qe2 Ne4 11.0–0 (11.Nc3 c6=) 11...c6 (11...Re8 12.c5=) 12.Nc3 Nd7 (12...Bf6 13.Rfe1=) 13.Rfe1 Re8 14.cd5 cd5 15.Rac1 Bd6 16.Rc2 (worse is 16.Ne4 fe4 (16...de4?! 17.Bc4=) 17.Be4 de4 18.Qe4 Nb6–+) 16...Bf7 (16...Rc8 A) worse is 17.Be4 fe4 18.Nd2 Qh4–/+; B) 17.Ne4? fe4 (17...de4?! 18.Rc8 Qc8 19.Rc1+=) 18.Be4 de4 19.Rc8 Qc8 20.Qe4 Nf6–+; C) 17.Nb5 Rc2 18.Qc2=) 17.Nb5 (17.Qd1 a6=) 17...Bf4 18.Bc1 (18.Qd1 a6 19.Nc3 Rc8=) 18...Ng5 19.Qe8 Be8 20.Bf4 Nf3 21.gf3 Nf8 (21...Qh4!? 22.Nc7 Qf4 23.Na8 Nf6=) 22.Nc7+= Ba4 23.Rc5 Attacks the isolani on d5 23...Qh4 24.Nd5 (24.Rd5 Qf4 25.Bc4 Kh8 (worse is 25...Qc7 26.Rc5 Qf7 27.Bf7 Kf7 28.Rf5 Kg6 29.Rf4=) 26.Na8 Bc6–/+) 24...Ng6 (24...Bb3 25.Nc7 Rd8 26.Be5+=) 25.Bg3 (25.Bc4 Kh8 26.Be5 Qg5 27.Kf1 Qh5+=) 25...Qd4 26.Bf5 Bc6 27.Nc7 Rf8 28.Ne6 (28.Bg6 hg6 29.Rce5 Rf3=) 28...Qd2 29.Re3 Re8 (29...Rf6 30.Kg2=) 30.Bg6 hg6 31.Rce5 a6 (31...Bd5 32.Ng5 Re5 33.Be5 Qd1 34.Kg2=) 32.Kg2 Bb5 (32...Qc1 33.h3=) 33.Re1 (33.Ng7 Re5 (worse is 33...Kg7 34.Re8 Be8 35.Re8+=) 34.Be5 Qd1+=) 33...Bc4 (33...g5 34.R1e3= (worse is 34.Ng5 Qe1 35.Re1 Re1–/+)) 34.Bf4 Qd7 35.Ng5 (35.Nc5 Re5 36.Re5 Qd1=) 35...Rf8 36.Bg3 Bd5 The isolani on f3 becomes a target (36...b6 37.R5e3=) 37.R1e3 Bc4 (37...Qc6 38.Ne4=) ½–½. Woschkat,Karl_Heinz (1680) – Braga da Silva,Flavio (2205), IECG, 1998.

6.d4 ed4 7.ed4 d5 8.Nf3 0–0 9.Bd3 Be6 10.c5 Ne4 11.0–0 Nc6 12.Nc3 a6 13.Ne2 Qd7 14.Ne5 Ne5 15.de5 Ng5 16.Nf4 a5 17.Bd4 Bf7 18.b5 c6 19.Re1 Ne4 20.Qc2 g5 21.e6! (worse is 21.Be4 de4 22.Ne2 cb5+=) 21...Be6 22.Ne6 (worse is 22.Be4 fe4 23.Ne6 Qe6+=) 22...Qe6 23.f3 Bf6 24.Bf6 Qf6 25.fe4 (25.Be4?! fe4 26.fe4 Qd4 27.Kh1 Rf2+=) 25...fe4 26.Be2 Rf7 27.Rad1 Qf2 28.Kh1 Raf8 29.Rc1 Qe3 30.Qd1 (30.a4 Rf2 31.g3 g4+=) 30...Qa3+= 31.Qd4 h6 32.Rb1 Rf6 33.bc6 bc6 34.Rb8! Kh7 (34...Rb8 35.Qe5 Double attack (35.Qf6 Deflection; 35.Qe5 Decoy)) 35.Rb7+– R6f7 36.Rb6 (36.Rb6 Qa2 37.Rc6+–) 1–0. marekt – Wulf452, ChessWorld.net, 2004.

6.d4 ed4 7.Bd4 Nc6 8.Bc3 =.

6.d4 Nbd7 7.Be2 0–0 8.Nh3 Ne4 (8...Qe8 9.0–0=) 9.0–0 Ng5 (9...a5 10.f3 Nef6 11.Ng5+=) 10.Ng5+= Bg5 11.de5 de5 12.c5 f4 13.ef4 (13.e4 Kh8+=) 13...ef4 (13...Bf4 14.g3 Bg5 15.Qd5 Kh8 16.Qe4+= (16.Be5? Ne5 17.Nc3 Nd7–+)) 14.Nc3 Bf6 (14...Ne5 15.Ne4 Re8 16.Re1+/–) 15.Qb3 (15.Qd5 Kh8+/–) 15...Kh8 16.Rfe1 Ne5 (16...a5!?+/–) 17.Ne4 f3 18.Nf6 Qf6 19.Be5 Qe5 20.Bf3 Qg5 21.Qe3 Qf6 (21...Qe3 22.Re3 c6 23.Rae1+–) 22.Qe7 c6 23.Qf6 gf6 24.Re7 Rb8 (24...a5 25.b5! cb5 26.Be4+–) 25.Be4 f5 26.Bc2 Ra8 (26...b6 27.Ra7 bc5 28.bc5+–) 27.Rd1 b6 (27...a5 28.Rd6 ab4+–) 28.Rd6 Rg8 (28...bc5 29.Rh6 Rd8 30.Reh7 Kg8 31.Bb3 Rd5 32.Rc7+–) 29.Bb3 (29.Bb3 Be6 30.Be6+–) 1–0. Cirulis,Ilmars (1955) – Hilbert,Stephan J (1740), FICGS, 2016.

6.d4 Nbd7 7.h3 0–0 8.Nf3 (8.de5 Ne5 (8...de5 9.c5 Kh8= 10.Nf3 Ne4 11.Bc4+=) 9.Nf3 Nf3 10.Qf3 Ne4 11.Bd3=; 8.Qc2 ed4 9.ed4 Ne4 10.Nf3 a5 11.b5=; 8.Nc3 a5 9.de5 Ne5 10.Nf3 Be6 11.Nd5=; 8.Be2 a5 9.de5 de5 10.c5 ab4 11.ab4=) 8...ed4 (8...e4 A) 9.Ng5 Nb6 10.h4 (10.Nc3+= h6 11.h4+=) 10...a5 11.Nc3+=; B) 9.Nfd2 Re8 10.Be2 c6 11.Nc3=) 9.Bd4 (9.Nd4 Ne5 10.Bd3 d5 11.c5=) 9...b6 (9...c5 10.Bb2= Nb6 11.Nbd2=; 9...Ne4 10.Bd3 c5 11.Bb2=) 10.Nbd2 (10.Bd3 c5 11.Bc3 Ne5=; 10.Be2 Ne4 11.0–0=) 10...Bb7 (10...a5 11.Be2=) 11.Ng5 (11.Bd3 c5 12.Bb2 Ne4=) 11...Qc8 12.Rg1 (12.Rb1 Ne5=) 12...Ne4 (12...Ne5 13.Be2+=) 13.Ne6 Rf7 14.Ne4 fe4 15.g4? (15.Nf4 Bf6=) 15...Nf8 (better is 15...Ne5 16.Be5 de5 (16...Qe6?! 17.Bd4–/+) 17.Ng7 Kg7–+) 16.Nf8+= Qf8 17.Ra2 Bh4 18.Rg2 Rd8 19.g5 c5 (19...Rf3 20.Qa4–/+) 20.Bc3 (20.g6 hg6 21.Bc3 Rf3–/+) 20...Rf3–/+ 21.Re2 (21.Qe2 Rh3 22.Bf6 gf6 23.gf6 Kh8–+) 21...d5 22.Be5? (better is 22.bc5!? bc5 23.Ba5–+) 22...dc4 (22...cb4 23.g6 h6 24.Qb3–+) 23.Qc2 Ba6?? (23...b5 24.Bf4 Rf4 25.ef4–+) 24.Bf4? (24.Qe4 Qf5 25.Qf5 Rf5 26.Bc7–/+) 24...Rd3 (24...cb4 25.Rg4 b3–+) 25.Rg4–/+ Qd8 (25...Ra3 26.Qd1 Bg5 27.Rg5 c3 28.bc5 h6=) 26.Rh4+= c3 (26...Ra3 27.Qc1 cb4 28.Rd2+/–) 27.Bg2 (27.Qb3 Qd5 28.Qd5 Rd5 29.Rc2 Bf1 30.Kf1+=) 27...Rd5?? (27...Rd2 28.Rd2 cd2 29.Qd2 Qd2 30.Kd2 Rf2 31.Kc3 cb4 32.ab4 Rg2+=) 28.Bf3+– ef3 29.Qh7 Kf7 30.Qc2?? (better is 30.Qh5 Ke7 31.Bd6 Kd6 32.Qf3 Rg5 33.Rg4 Be2 34.Ke2 Rg4 35.hg4=) 30...fe2 (30...Be2 31.g6 Kg8–+) 31.g6? (31.Qb3 c4 32.Qc3 Rg5 33.Ke2–+) 31...Kg8 32.Qa2 c2! (32...Qh4?? 33.Qd5 Kh8 34.Qa8 Bc8 35.Qc8 Qd8 36.Qd8) 33.e4 (33.Qc2 Rd1) 33...c4 (33...Qh4?? 34.Qd5 Kh8 35.Qa8 Bc8 36.Qc8 Qd8 37.Qd8) 34.ed5 Qh4 35.Bg3?? (35.Qc2 Qf4 36.Qa4 Qc1 37.Ke2 Qb2 38.Kf3 Qb3 39.Qb3 cb3 40.h4–+) 35...c1Q 36.Ke2 Qe4 0–1. Dewindt,Cor – Birgani,Farokh, Canada op Edmondton, 2000.

6.Ne2 0–0 7.d4 e4 8.Nbc3 a5 9.b5 b6 (9...c6 10.Nf4+=) 10.Nf4+= g5 (10...c6 11.Qb3+=) 11.Nfd5+/– f4 (11...Nd5!? 12.Nd5 Bf6+/–) 12.Nf6+– Bf6 13.Ne4 fe3 14.fe3 (14.Nf6?! Qf6 15.f3 Bf5+=) 14...d5 (better is 14...Qe7!? 15.Bd3 Bg7+–) 15.cd5+– Qd5 16.Qc2 Be6 17.Nf6 Rf6 18.Bd3 (18.Qc7 Qf5 19.Be2 Qf2 20.Kd2 Bg4 21.Qd8 Kg7+–) 18...Nd7 (18...Qd6 19.Bh7 Kh8+–) 19.Bh7 Kg7 20.Be4 (20.Be4 Qb5 21.Ba8+–) 1–0. woschkat (2395) – epiglotis (2565), net–chess.com, 2003.

6.Ne2 0–0 7.d4 Qe8 8.Nd2 f4 9.ef4 ef4 10.h3 d5 11.Qb3 a5 12.c5 (12.cd5!? Kh8 13.ba5 Ra5 14.Nc3 (worse is 14.Nf4 Bd6 15.Ne2 Rb5–+) 14...Bb4 15.Be2 Bc3 16.Qc3=) 12...ab4–/+ 13.ab4 Ra1 14.Ba1 Kh8 15.Nf3 Nc6 16.Ne5 (16.Bb2!?+=) 16...Ne5 17.de5 Ne4 18.Bd4 (18.Qd5 Qa4 19.Qd1 Qb4 20.Nc3 Nc3 21.Bc3 Qc3 22.Qd2 Qa1 23.Qd1 Qe5 24.Be2 f3 25.gf3 Rf3–+) 18...c6 19.Qf3 (19.Ng1 Qg6–/+) 19...b6!–+ 20.Qa3 (20.cb6 Bb4 Pinning (20...Bb4 Deflection)) 20...bc5 21.bc5 Bh4 22.Ng1 Ng5 23.Nf3 Ne6 24.Qc3 Qg6 25.Qd3 Nd4 26.Nd4 Bf5 27.Qf3? (27.Nf5 Qf5 28.Be2 Qe5–/+) 27...Bd8 (better is 27...Be4 28.Qg4 Qh6–+) 28.Be2–/+ Ba5 29.Kf1 Rb8 30.Kg1 Be4 31.Qg4 Qe8 32.Kh2 (better is 32.e6!? Bc7 33.Bf3–/+) 32...Bc7 33.f3 (better is 33.Rd1 Be5 34.Nf3–+) 33...Be5 34.Rd1 Bd4?? (better is 34...Bg6 35.Ba6 Rb4–+) 35.Rd4+= Qe5 36.Rb4 Rf8 37.Bd1 (37.fe4? f3 38.Kh1 h5 (38...fe2?! 39.Qe2 Ra8 40.Kg1–/+) 39.Qf3 Rf3 40.Bf3 Kh7–+) 37...Bg6 38.Qh4 (better is 38.Qd7!?+=) 38...d4 39.Qf2 Rd8 40.Rc4 (40.Qh4 Re8 41.Ba4 Qc5–+) 40...h6 41.Qd2 Qe3 42.Qa5 (42.Qb2–+) 42...Re8 43.Qc7 Kh7 44.Ba4 (44.Qd6 Qe1 45.Qf4 Qd1 46.Rd4–+) 44...Qd2 45.Qd7 Re2 46.Qg4 Qd3 (46...Qd3 47.Rc1 Qa3–+) 0–1. Dragojevic,Mi (2130) – Bosiocic,Mari (2555), Zagreb Open, 2015.

6.Ne2 a5 7.b5 Nbd7 8.d4 0–0 9.g3 c5 10.Bg2 Nb6 11.Nd2 Qe8 (better is 11...Qc7!?=) 12.de5+/– de5 13.Be5 Qf7 14.Qc2 Nfd7 15.Bc7 Bf6 16.Rd1 Be5 17.Bb6 Nb6 18.0–0 Be6 19.Rc1 Rab8 20.a4 Kh8 21.Rfd1 Nc8 (better is 21...Rfd8!?+=) 22.Nf3+/– Bf6 23.Nf4 b6 24.Ne6 Qe6 25.Ne1 Ne7 26.Rd3 Rbd8 27.Rcd1 Ng6 28.Rd5 Rd5 29.Rd5 (29.cd5 Qe5+–) 29...Ne7 30.Rd1 Ng6 31.Bh3 Ne5 (31...Be5 32.e4 Ne7 33.Nf3+–) 32.Rd5 (32.Bf5!? Qf7+–) 32...g6+/– 33.Bf1 Kg7 34.Qd1 Be7 35.Be2 Nf7 36.Ng2 Rd8 37.Nf4 Rd5 1–0. Paauwe,J – Zootjes,M, PKS op–B Netherlands, 2003.

6.Nf3 c5 7.b5 (7.bc5!? e4 8.cd6 Bd6 9.Ne5+=) 7...0–0+= 8.Be2 h6 9.d3 Nh7 10.Nbd2 e4? (better is 10...Nf6!?=) 11.de4+/– fe4 12.Ne4 Ng5? (better is 12...Be6!?+–) 13.Neg5 (13.Nfg5 hg5 14.Qd5 Kh8+–) 13...Bg5 (13...Qa5 14.Kf1 hg5 15.Qd5 Kh8 16.Bd3+–) 14.0–0 (14.Qd5 Rf7 15.Ng5 Qg5 16.Qg5 hg5+–) 14...Nd7? (better is 14...Bf6 15.Qd5 Kh8 16.Bf6 Rf6+–) 15.Ng5 Qg5 16.Qd5 (better is 16.Qd6 a6 17.Rad1+–) 16...Qd5+/– 17.cd5 Nb6 18.e4 Na4 19.Rab1 Rf4 20.f3 Bd7 21.Rfc1 Rf7 22.Ba1 a6 23.ba6 ba6 24.Rb7 Bb5 (24...Bc8 25.Rb3+–) 25.Rf7 (better is 25.Bb5 ab5 26.Rb5+–) 25...Kf7+/– 26.Bd1 Rc8 Black plans c4 27.Ba4 Ba4 28.Rb1 Bb5 (28...Rd8 29.Rb6 Bb5 30.Bc3+–) 29.Bc3 (29.a4 Ba4 30.Rb7 Ke8 31.Bg7 h5+–) 29...c4 (29...g6!?+/–) 30.Kf2 Rc7 31.Ke3 Rc5 (31...g5 32.Rb4 Ke7 33.a4+–) 32.Kd4 Rc7 33.Rb4 Kg6 (33...Ke8 34.a4 Bd7 35.Rb6 Ba4 36.Ra6+–) 34.a4 Bd7 35.Rc4 Rc4 36.Kc4 Ba4 37.g3 Kf7 38.f4 White prepares the advance e5 (38.Bb4 Bb5 39.Kd4 Be2+–) 38...Bb5 39.Kd4 g6 40.e5 (40.Bb4 h5+–) 40...de5 (40...Be2 41.Bb4+–) 41.fe5 Ke7 (41...Bd7 42.e6 Be6 43.de6 Ke6 44.Kc5+–) 42.Kc5 (42.e6 h5+–) 42...Kd7 (42...Be2 43.e6 g5 44.Kd4+–) 43.Ba5 h5 44.h4 (44.Bd2 Ke8+–) 44...Ba4 45.e6 Ke8 (45...Ke7 46.Kd4 Kf6 47.Ke4 Bc2 48.Kf4+–) 46.Bc7 (46.d6 Bb5+–) 46...Bb3 (46...Ke7+–) 47.Kd6 Bc4 48.Ke5 Bb3 49.d6 Bc4 (49...Ba4 50.Kf6+–) 50.Kf6 (50.d7 Kf8 51.d8Q Kg7 52.Qe7 Kh6 53.Kf6 Be6 54.Qg7) 50...Bb3 (50...Bb5+–) 51.d7 Kf8 52.d8Q 1–0. Fournier,Frederic (1795) – nivo37 (1835), Active, 2011.

6.Nf3 Be6 7.d3 h6 8.Nbd2 0–0 9.Be2 Qe8 10.0–0 Nbd7 11.Qc2 Rc8 12.Rac1 c6 13.Rfe1 Bd8 14.h3 a5 15.Bf1 Bc7 16.Nb3 a4 17.Nbd2 b5 18.cb5 cb5 19.Qc6 Nb6 20.Qe8 Rfe8 21.Nb1 Nbd5 22.Nc3 Nc3 23.Rc3 Bb6 24.Rec1 Nd5 (24...Rc3 25.Rc3 Bd7 26.Rc1+=) 25.Rc8 (better is 25.Rc6!? Rc6 26.Rc6+/–) 25...Rc8+= (worse is 25...Bc8 26.d4 Bd7 27.de5 Ne3 28.ed6 Nf1 29.Kf1+– (29.Rf1?! Re2 30.Bc3 Rc2+=)) 26.Rc8 Bc8 27.d4 e4 28.Nd2 Bd7 29.Nb1 Kf7 30.Nc3 Nc3 31.Bc3 d5 ½–½. Fournier,Frederic – Arnzap (1675), Partie evaluee, 7m + 3s, 2009.

6.h3 0–0+= 7.Qc2 (7.d4 ed4 8.Qd4 Nc6+=) 7...Kh8 (7...Re8 8.Ne2+=) 8.Nf3 (8.Ne2 a5+=) 8...a5 (8...e4 9.Nh2+=) 9.b5 e4 (9...c6 10.bc6 Nc6 11.Be2=) 10.Nd4= c5 11.bc6 bc6 12.Be2 (12.Nc3 c5 13.Ndb5 Nbd7=) 12...c5 (12...Ra7 13.0–0=) 13.Nb5 Nc6 14.f4 (14.0–0 Rb8=) 14...ef3 (14...d5!?+=) 15.Bf3= Bd7 16.N1c3 (16.0–0 Rb8=) 16...Rb8 17.0–0–0 (better is 17.0–0!?=) 17...Ne5–/+ 18.Be2 Ne4 (18...Be6 19.Qa4–/+) 19.Ne4+= fe4 20.Be5 (worse is 20.Qe4 Bc6 21.Qc2 Bf6–/+) 20...de5 21.Qe4 Bf5 (21...Rf2 22.Rde1+=) 22.Qe5= Rb5?? (better is 22...Bf6 23.Qg3 Qe7=) 23.cb5+– Bf6 24.Qf4 (24.Qc5?! Qe7 25.Qf5 Qa3 26.Kc2 Qa4 27.Kc1 Qa1 28.Kc2 Qa4 29.Kc1 Qa1 30.Kc2 Qa4=) 24...c4 The mate threat is Qe7 25.Qf5 (25.Qc4 Deflection from d6 25...Qd6) 25...Bb2 26.Kb2 Rf5 27.Bc4 The passed pawn on d2 will quickly become a dangerous weapon 27...Rf2 28.Kc3 (28.Kc2!? Rg2 29.Rhf1 Qc8+–) 28...Qd6+/– 29.Kb3 Rd2 30.Rd2 (30.Rc1 Rg2 31.Ka4 g5+/–) 30...Qd2 31.Rf1 Threatening mate: Rf8 31...Qe3 32.Ka4 h5 33.Rf5 g6 34.Rf6 (34.Rf7 Qc5 35.Rf4 g5+=) 34...Qe4+= 35.Rc6 Qg2 36.Rc8 Kg7 37.Rc7 Kf6 (37...Kh6 38.b6 (worse is 38.Ka5 Qg3 39.b6 Qa3 40.Kb5 Qh3+=) 38...Qc2 39.Ka5 Qc3 40.Kb5 Qb2 41.Kc6 Qf6 42.Kb7 Qf3 43.Rc6 Qh3 44.Bf7 Qa3 45.Bg6=) 38.b6+= Qg3 (better is 38...Qb2!? 39.Rc6 Ke5+=) 39.Rc6+– Kf5 40.b7 White threatens strongly Rc8 40...Qb8 41.Ba6 Qe8 42.Kb5 (42.Ka5!? Qd8 43.Rb6 Qd2 44.Ka4 Qf4 45.Rb4 Qb8 46.Bd3 Ke6 47.Bg6 h4+–) 42...g5+/– 43.Kb6 (43.Ka5 g4 44.hg4 hg4 45.Bd3 Kg5+–) 43...g4 44.hg4 hg4 45.Rc8 Qe6 46.Ka7 Qd7 47.Rc5 (47.Bb5 Qd4 48.Ka8 Qd5+–) 47...Ke4 48.Ka8 (48.Ra5?! Qc7+/–) 48...Qd6 49.Ra5 Qd8 50.b8Q Threatening mate... how? 50...Qa5 51.Qe8 (51.Qb4 Qb4 52.ab4 Kd4=) 51...Kd4 (51...Kf3 52.Qc6 Kf2 53.Qc2 Kg3 54.Qd3 Kf2 55.Kb8+–) 52.Qd7 Kc5 (52...Ke5 53.Qe7 Kf5 54.Kb7 Qd5 55.Kb6 Qb3 56.Ka7+–) 53.Qf5 Kb6 Threatening mate: Qxa6 54.Qe6 Kc5?? (54...Kc7+–) 55.Kb7 (better is 55.Qe5 Kc6 56.Qa5 Kd7+–) 55...Qd8 (55...Kd4 56.Qg4 Ke3 57.Qe2 Kf4 58.Qc4 Ke5 59.a4+–) 56.Qf5 (56.Qc4 Kd6 57.Qf4 Ke6 58.Bc4 Qd5 59.Bd5 Kd5 60.Qg5 Kd6 61.a4+–) 56...Qd5 57.Qd5 Kd5 58.Kb6 Kd6 (58...Kd4+–) 59.Bb7 Kd7 60.a4 (60.a4 g3 61.a5+–) 1–0. Gagnon,Mark – Anderson,Renard (2245), LERA Class–ch, 1994.

6.d4 e4

7.Nc3 0–0 8.Qc2 a5 (8...c6 9.Nge2=) 9.b5 c6 10.h3 (10.Nge2 cb5 11.cb5 Be6=) 10...Nbd7 11.Nge2 Nb6 12.Na4 (12.Nf4 g5 13.Nfe2 Nc4 14.Ne4 fe4 15.Qc4 d5+=) 12...Be6 (12...cb5 13.Nb6 Qb6 14.Qb3+=) 13.Nb6 (13.bc6 A) 13...Nc4? 14.Nf4 (14.cb7?! Ra6+–) 14...Nb2 15.Ne6 (15.Qb2?! Bf7+=; 15.Nb2?! Bf7=) 15...Nd3 16.Bd3 ed3 A1) 17.Nd8?! dc2 18.Ne6 Rac8= (worse is 18...bc6 19.Nf8 Rf8 20.Ke2+/–); A2) 17.Qd3?! Qc8 18.Nf8 Qc6+–; A3) 17.Qb3+–; B) 13...bc6 14.Nf4 Bf7=) 13...Qb6 14.Nc3 (14.bc6 bc6 (worse is 14...Qc6 15.d5 Nd5 16.Nd4 Ne3 17.fe3 Bh4 18.Kd1+/–) 15.Rb1 Rab8+=) 14...cb5 15.d5 Bd7 16.cb5 Rac8 17.Qd2 Qc5 (17...Be8 18.Be2=) 18.Be2 (18.Rc1 Qb6+=) 18...Be8 (18...Rc7 19.Rc1 Rfc8 20.0–0+=) 19.0–0 Bf7 Increases the pressure on d5 20.Rfd1 (20.Rac1 Qa7+= (20...Bd5?? 21.Na4 Qa7 22.Bf6 Bf6 23.Qd5 Kh8 24.Rc8 Rc8 25.Qf5+–)) 20...Nd5= 21.Nd5 Bd5?? (better is 21...Qd5 22.Qd5 Bd5 23.Rd5 Rc2 24.Bg7 Kg7=) 22.Rac1 (22.Qd5?! Qd5 23.Rd5 Rc2 24.Bg7 Kg7=) 22...Qc1 (22...Bb3 23.Rc5 Rc5+–) 23.Qd5 Kh8 24.Rc1 (24.Rc1 Rc1 25.Bc1+–) 1–0. Gouma,Ronald – Kok,Marijke, Den Bosch op, 1992.

7.Nc3 0–0 8.Nge2 a5 =.

7.Nc3 0–0 8.Nh3 c6 9.Qb3 Na6 10.Be2 Nc7 11.0–0 Be6 12.f3 d5 13.Ng5 Qd7 14.Ne6 Qe6 15.fe4 fe4 (worse is 15...de4 16.d5 Qd7 17.dc6 bc6 18.c5 Nfd5 19.Rad1+/–) 16.b5 Kh8 17.a4 Ng4 18.cd5 cd5 19.Bg4 Qg4 20.Ba3 (20.Nd5? Qe6 21.Ba3 Ba3 22.Qa3 Rf1 23.Rf1 Nd5 (23...Qd5?! 24.Rf8 Rf8 25.Qf8 Qg8 26.Qe7+=) 24.Rf8 Rf8 25.Qf8 Qg8–+) 20...Rf1 21.Rf1 Bg5 22.Nd1 (22.Nd5 Qe6 23.Rf5 Qf5 24.Nc7 Rc8–+) 22...Qd7 23.Nf2 h5 24.Nh3 White launches an attack 24...Bh6 25.Nf4 Bf4 26.Rf4 Re8 27.Qd1 g6 28.Qf1 Kg8 29.Rf8 Rf8 30.Qf8 Kh7 31.Qb8 Ne6 32.Qa7 h4 33.Qb8 h3 34.Qg3 hg2 35.Bd6 Qc8 36.Kg2 Qc2 37.Qf2 Qd1 38.h3 Ng7+= 39.a5 Nf5 40.Bf4 Qa4 41.a6 ba6 42.ba6 Qa6 43.Qc2 Qf6 44.Qc7 Qg7 45.Qd8 Qb7 46.Kf1 Kg7?? 47.Be5+/– Kf7 48.Qf6 Ke8 ½–½. Soppe,Guillermo (2465) – Needleman,Alejandro (2420), Magistral Vince Toth 4th, 2002.

7.Nc3 c6 8.Nge2 d5 (8...0–0 9.Nf4=) 9.cd5+= cd5 10.Nf4 Bd7 (better is 10...g5!? 11.Nh5 0–0+=) 11.Ncd5 Nc6 (11...Bd6 12.Nf6 Qf6 13.Rc1+/–) 12.Nf6 Bf6 13.Bc4 a5 (13...a6 14.Rc1+–) 14.Qh5 g6 15.Ng6! hg6 16.Qg6 (16.Qg6 Ke7 17.d5+–) 1–0. wiking – maurice91, internet, 2010.

7.Nc3 Bd7 8.Nge2=.

7.d5 0–0 8.Ne2 (8.Nh3 a5=) 8...Nbd7 (8...Ng4 9.Nbc3=) 9.Nbc3 (9.Nf4 Ne5+=) 9...Ne5 (9...Nb6 10.Nf4=) 10.Nf4 Re8 (10...a5 11.Be2+=) 11.Qb3 (11.Be2 Bd7+=) 11...Bf8 (11...a5 12.Be2+=) 12.Be2 g5 13.Nh3 h6 (13...Bh6 14.Qc2=) 14.Rd1 (14.0–0 Bg7+=) 14...a6 (14...Bg7 15.0–0=) 15.Na4 (15.Qc2 a5+=) 15...Bd7 (15...f4 16.Be5 de5 17.Ng1=) 16.0–0 Ba4 (16...Bg7 17.Nc3=) 17.Qa4+/– Qd7 18.Qb3 Bg7 19.c5 Kh8 20.Rc1 (better is 20.Rd2!?+/–) 20...dc5= 21.Rc5 b6 22.Rc2 Qd5 23.Qd5 (23.Qc3 Qe6=) 23...Nd5–/+ 24.Rd1 Red8 25.Rcd2 c6 26.f4 (26.Bd4 Nd7–/+) 26...ef3 (26...Ng4 27.Bg4 fg4 28.Bg7 Kg7 29.Nf2 gf4 30.Ng4–+) 27.gf3–/+ Re8 28.f4 (28.e4 Ne3 29.Rc1 b5 30.Be5 Re5+=) 28...Ng4 (28...Ng6 29.Bg7 Kg7 30.fg5 Re3 31.Nf2 hg5 32.Bc4–+) 29.Bg7–/+ Kg7 30.fg5 Re3 31.Bg4 fg4 32.gh6 Kh6 (32...Kh7 33.Nf2 Ra3 34.Ng4–+) 33.Nf2 (33.Rc1 Re6 (33...Rh3?! 34.Rc6 Nf6 35.Rf6 Kg5 36.Rb6=) 34.Nf2 Kg5–+) 33...Rg8 (33...Kh5 34.Nd3–+) 34.Rd4 (34.Rd3 Re2–/+) 34...Ra3–+ 35.Rg4 Rg4 36.Ng4 Kg5 37.Ne5 Nb4 38.Nc4 Rd3 (38...Ra2 39.Nb6 c5 40.Nd7–+) 39.Rd3 Nd3 40.Nb6 a5 (40...Kg4 41.Nc4–+) 41.Kf1 Nb2 (41...Kf4 42.Ke2 Ke4 43.Kd2–+) 42.Ke2–/+ Kh4 43.Kd2 ½–½. Mohring,Norbert (1815) – Rodemann,Edmund (2060), Alpenpokal, 2002.

7.Ne2= 0–0 8.Nf4 c6 (8...a5 9.d5=) 9.Nc3 (9.Be2 g5 10.Nh3 f4 11.ef4 g4+=) 9...Na6 (9...a5 10.b5+=) 10.Be2+= Nc7 (10...g5 11.Nh3 h6 12.Qc2+=) 11.d5 g5 12.Nh3 Ng4 (12...cd5 13.cd5 h6 14.Qd4+=) 13.Qd2 (13.dc6 bc6 14.Ne4 Ne3 15.fe3 fe4+=) 13...Bf6= 14.Rd1 Ne8 (14...cd5 15.Nd5 (worse is 15.cd5 Be5=) 15...Bb2 16.Nc7 Qc7 17.Qb2+/–) 15.dc6+/– bc6 16.f4 ef3 17.gf3 (17.Bf3 Bd7+=) 17...Ne5 (17...Nh6 18.Rg1 a5 19.Ng5+–) 18.f4 gf4 19.Nf4 Rf7 20.c5 Ba6 (20...Rd7 21.Rg1 Kh8 22.cd6 Nd6 23.Qc1+=) 21.Rg1+/– (21.cd6 Nf3 22.Bf3 Bh4 23.Qf2 Bf2 24.Kf2 Qh4 25.Kg1 Nd6 26.Bc6 Rg7 27.Bg2 Re8–+) 21...Rg7 22.Rg7 Bg7 23.b5 Qh4 24.Kf1 Bb7 25.cd6 Rd8 26.d7 (26.bc6 Bc6 27.Nb5 a6 28.Be5 Be5=) 26...Nf6 (26...Rd7 27.Qd7 Nd7 28.Rd7+=) 27.h3 (27.Qd6 Nfd7 28.Qc7 Rb8 29.Rd7 Nd7 30.Qd7 Qh2 31.Bc4 Kh8+/–) 27...cb5 (27...Rd7 28.Qc2 Rd1 29.Nd1 Ne4 30.Be5 Ng3 31.Kg1 Ne2 32.Qe2 Qg3 33.Kf1 Be5 34.bc6 Bc8+=) 28.Qd6+= (worse is 28.Nb5 A) 28...Rd7?! 29.Qe1 Rd1 30.Bd1 Qe1 31.Ke1+=; B) 28...Ned7? 29.Bc4 Kh8 30.Nd6+– (30.Na7?! Qg3+=); C) 28...Nfd7 29.Nd6 Be4 30.Ne4 fe4 31.Be5 Be5 32.Bg4+–; D) 28...Ne4 29.Qe1 Ng3 30.Kf2 Ne2 31.Ke2 Bf3 32.Kf1 Qe1 33.Re1 Rd7+=) 28...Nfd7 (28...Ned7 29.Qc7 (29.Bb5 Ng4 30.Qe6 Kh8 31.hg4 Qh1 32.Kf2 Qh2 33.Kf1 Qh1 34.Ke2 Qh2 35.Kf1 Qh1=) 29...Re8 30.Bb5 (30.Rd7 Nd7 31.Bb5 Re3 32.Qc4 Bd5 33.Qd5 Kh8 34.Qa8 Nf8+–) 30...Re3 31.Qc4 Nd5 32.Ncd5 Rf3 33.Kg1 Qf2 34.Kh1 Rf4 35.Qe2 Qe2 36.Be2 Bb2 37.Ba6 Bd5 38.Rd5–+) 29.Nb5 Kh8 30.Qc7 Ba6? (better is 30...Be4!?+=) 31.Nd6 (31.Rd5 Kg8+–) 31...Be2+/– 32.Ke2 (worse is 32.Ne2 Qh3 33.Ke1 Qh4 34.Kf1 Bf6–/+) 32...Rf8 33.Nc4 (33.Qa7?! Qg5+/–) 33...Re8 34.Ne5 Ne5 35.Rd5 (35.Qa7 Rg8 36.Qc7 Nf7 37.Bg7 Rg7 38.Qc8 Rg8 39.Qc3 Rg7+–) 35...Kg8 36.Be5 (worse is 36.Re5 Be5 37.Qc4 Kh8 38.Ng6 hg6 39.Qh4 Kg7+–) 36...Qe7 37.Qc4 (37.Qe7 Re7 38.Bg7 Kg7 39.Rf5 a6+–) 37...Kh8 38.Bg7 Qg7 39.Rf5 (39.Rf5 Qg1 40.Qd4 Qg7 41.Kd3+–) 1–0. Baer,Werner – Zimmermann,Joerg, TT–04.35 TSC, 2002.

7.Ne2 a5=.

6.Nf3 0–0

7.Qb3 e4 8.Nd4 (8.c5 d5 9.Nd4 Nc6 10.Nc6 bc6 11.Be2 Be6 12.Nc3 Bf7 13.Qa4 Qd7 14.0–0) 8...c5 9.Nc2 (9.Ne2 a5 10.bc5 Na6 11.cd6 Nc5 12.de7 Qe7 13.Qa2 Nd3 14.Kd1 Nf2) 9...Nc6 10.Nc3 Qe8 (10...Ne5 11.Nd5 b6 12.Be2 Nd5 13.cd5 Bf6 14.0–0) 11.Nd5 Qf7 12.Bc3 (12.Ne7 Qe7 13.Be2 b6 14.f4) 12...Bd8 (12...Be6 13.Ne7 Qe7 14.Be2) 13.Qb2 (13.Be2 Be6 14.Nf4) 13...Nd5 14.cd5 Ne5 15.bc5 Nd3 16.Bd3 ed3 17.Nb4 f4 18.0–0–0 (better is 18.Nd3 fe3 19.de3 (19.fe3?! Bh4 20.Kd1 Qd5=) 19...Qd5 20.Nf4 (20.Bg7? Qd3 21.Bc3 dc5–+) 20...Qc5 21.Bg7 Ba5 22.Kf1+/–) 18...Bf5+= 19.c6 Rb8 (better is 19...bc6!? 20.Bg7 Qg7 21.Qg7 Kg7 22.dc6 Rc8 23.ef4 a5–+) 20.Na6+= (worse is 20.ef4 bc6 21.Qa2 c5–/+) 20...ba6 (20...Bb6!? 21.Nb8 Rb8+=) 21.Qb8+/– Bf6 22.Qd6 Rd8 23.Qf4 (23.Qb4 Bc3 24.Qc3 Qd5 25.c7+/– (25.ef4?! Rd6 26.Qe5 Rc6 27.Kb1 Qb3 28.Qb2 Qa4 29.Qb8 Bc8=)) 23...Qd5+/– 24.Bf6?? (better is 24.Qb4 Qc6 25.Kb2+/–) 24...Qb3 25.Qc4 Qc4 26.Kb2 Qc2 27.Ka1 gf6 28.Rc1 Qd2 29.Rhd1 Qa5 30.c7 Qa3–+ 31.Kb1 d2 32.Rc2 Rc8 33.Rdd2 Rc7 (33...Rc7 34.e4 Rb7 35.Rb2 Be4 36.Kc1 Qa1 37.Rb1 Rb1) 0–1. Buck,K1 (1805) – Kuehn,Pe2 (2035), 10th TCh–Euro sen, Dresden GER, 2008.

7.d4 e4 8.Nfd2+=.

7.Be2 Nbd7 8.d4 e4 9.Ng5 (9.Nfd2 a5 10.0–0 ab4 11.ab4 Ra1 12.Ba1=) 9...Nb8 (9...Nb6 10.Nc3 (10.Nd2= Qe8 11.0–0 Na4 12.Qb3=) 10...h6 11.Nh3 d5 12.c5+=) 10.d5 (10.0–0 d5 11.Nc3 c6 12.Nh3=) 10...h6 (10...Ng4 11.Ne4 Ne3 12.fe3=) 11.Nh3 Kh7 (11...a5 12.Nf4+=) 12.Nc3 (12.0–0+=) 12...a5 13.Nf4 g5 14.Nh5 Nh5 15.Bh5 Nd7 16.Be2 Ne5 17.0–0 Bf6 18.Qc2 g4 19.c5 Bd7 20.Qd2 (20.Rfc1 Qe8+=) 20...Qe8 (20...Nf3 21.Bf3 gf3 22.Qc1–/+) 21.Kh1 Qh5 22.Nb5 Nf3? (better is 22...Bb5 23.Bb5 c6=) 23.gf3+– gf3 24.Nd4?? (better is 24.Bc4 Rg8 25.Rg1+= (25.Bf6?? Rg2 26.h4 Qg4 27.Be5 Qh4 28.Bh2 Qh2; 25.cd6?? Rg2 26.Be5 Be5 27.dc7 Qh2; 25.Nc7?? Rg2 26.Be5 Be5 27.Na8 Qh2)) 24...fe2 (better is 24...Be5 25.Nf3 ef3 26.Be5 fe2–+ (26...de5?! 27.Bd3+=)) 25.Ne2?? (25.Rg1 ab4 26.Qb4 Bd4 27.Bd4 Qf3 28.Rg2 Rg8 29.Rag1 Rg2 30.Rg2 Rg8 31.Bg7 Rg7 32.Qe4 e1Q) 25...Qf3 26.Kg1 f4! 27.ef4 (27.Nf4 Rg8; 27.ef4 Bh3) 27...Bh3 0–1. Skulsky,Ian – Ljubisavljevic,Zivojin Z (2305), Vancouver Keres mem op, 1998.

7.Be2 h6 8.0–0 Be6 9.d3 c6 10.Nbd2 Nbd7 11.Qc2 Qe8 12.d4 White prepares the advance c5 12...e4 13.Ne1 Rc8 14.g3 d5 15.c5 Bf7 16.Ng2 Bh5 17.Qd1 Be2 18.Qe2 Nh7 19.Nf4 Qf7 20.Qh5 Qh5 21.Nh5 g6 22.Nf4 Kf7 23.f3 Ng5 24.fe4 Ne4 (24...fe4? 25.Nd5 Nf3 26.Nf3 cd5 27.Ne5 Ke6 28.Ng6 Rf1 29.Rf1+–) 25.Ne4 de4 26.d5 cd5 27.Nd5 Bf6 28.Nf6 Nf6 29.Bf6 Kf6 30.Rad1 Rfd8 31.Kf2 Rd3 32.Rd3 ed3 33.Rd1 Rd8 34.Rd2 Ke5 35.Kf3 g5 36.h3 (36.Kg2 Ke4 37.Kf2 g4–/+) 36...h5 (36...g4 37.hg4 fg4 38.Kf2–+) 37.g4? (better is 37.h4 g4 38.Kf2–/+) 37...hg4 38.hg4 f4?? (better is 38...fg4 39.Kg4 Ke4–+) 39.ef4 (39.Rd1 d2 40.ef4 gf4=) 39...gf4 40.g5 Kf5 (better is 40...Kd4!?–/+) 41.g6= Kg6? (better is 41...Rd7!?=) 42.Kf4+/– Rh8 43.Rd3 Rh4 (43...Kf6 44.Rd7 Rb8 45.b5+–) 44.Ke5 Rh5 45.Kd6 Kf6 (45...Rh7 46.b5 Kf5 47.Rd5 Kf4 48.c6 bc6 49.bc6 Rh6 50.Kc7+–) 46.Rf3 (46.Kc7 b5+–) 46...Kg5 47.Re3 Rh7 (47...Rh6 48.Re6 Rh3 49.Re7+–) 48.Re4 (48.Re7 Rh6 49.Kc7 b6+–) 48...Kf5 (48...Rh6 49.Re6 Rh3 50.Re7+–) 49.Re5 Kf4 50.Re7 Re7 (50...Rh3+–) 51.Ke7 Ke5 52.Kd7 Kd5 53.Kc7 a5 54.Kb7 a4 (54...ab4 55.ab4 Kc4+–) 55.c6 Kc4 56.c7 Kb3 57.c8Q 1–0. Fournier,Frederic – Captainmax, Partie evaluee, 7m + 2s, 2009.

7.Be2 h6 8.0–0 Be6 9.d4 e4 10.Nfd2 Nbd7 11.d5 Bf7 12.Qb3 Nh7 13.f3 ef3 14.Nf3 (14.gf3?! Bf6=) 14...Bh5 15.Nd4 Be2 16.Ne2 c5 17.dc6 bc6 18.Nd4 Bg5 19.Nc6 Qb6?? (better is 19...Qe8 20.Bd4 f4 21.c5 Kh8+–) 20.c5 Kh8 21.cb6 Nb6 22.Nd4 (22.Nd4 Bf6 23.Rf5+–) 1–0. Diederich,Hauke – Wolf,Christian (2095), GER–chT WK II schools U18, 1999.

5.c4 g6

6.d4 ed4 7.Bd4 Bg7 =.

6.d4 e4 7.Be2 ½–½. Hecimovic,Ivan (2275) – Lasic,Luka (2260), Velika Gorica op 4th, 2004.

6.Nf3 e4 7.Nd4 Bg7 =.

6.Nf3 Bg7 7.Nc3 0–0 8.Be2 Nc6 9.Qc2 h6 10.h3 g5 11.0–0–0 Be6 12.d4 ed4 13.Nd4 Nd4 14.ed4 Qd7 15.d5 Bf7 16.Bd3 Bg6 17.g4 Nh7 18.Rhe1 Rf7 19.Re6 Rf6 20.gf5 Bf7 21.Rde1 Be6?! (21...a5 22.b5 Qd8+–) 22.fe6 (22.fe6 Qe7 23.Bh7 Kh8 24.Be4+–; 22.Re6?! a5=; 22.de6?! Qe8+–) 1–0. combijack (1800) – oldtimer (1715), gameknot.com, 2012.

6.Nf3 Bg7 7.d3 Nbd7 8.Be2 0–0 9.0–0 c6 10.Nbd2 h6 11.h3 Re8 12.Nh4 Kh7 13.d4 Ne4 14.Nhf3 ed4 15.Bd4 (worse is 15.Nd4 c5–/+) 15...Bd4 16.Nd4 (16.ed4? Nc3 17.Qc2 Ne2 (worse is 17...Re2 18.Qc3 a5 19.Qd3+=) 18.Kh1 a5–+) 16...Ndf6 17.Ne4 Ne4 ½–½. Fournier,Frederic – Daniel, Partie evaluee, 2009.

6.Nf3 Bg7 7.d4 e4 8.Nfd2 0–0 =.

6.Nf3 Bg7 7.g3 0–0 (7...e4 8.Nd4+=) 8.Bg2 (8.d4 e4 9.Ng5 h6+=) 8...Nbd7 (8...e4 9.Nd4–/+) 9.d4+= e4 10.Nfd2 Nb6 11.Nc3 (11.0–0 Be6 12.d5 Bd7=) 11...Bd7 (11...Be6 12.d5 Bd7 13.0–0=) 12.Qb3 (12.f3 ef3 13.Qf3 Be6=) 12...Kh8 (12...Be6 13.0–0=) 13.0–0 Qe8 (13...Ng4 14.h3 Nf6 15.f3 ef3 16.Bf3+=) 14.Rac1 (14.f3 ef3 15.Rf3 Bc6+=) 14...Na4 (14...Ng4 15.h3 Nf6 16.f3+=) 15.Na4 (15.f3 f4 16.Na4 Ba4=) 15...Ba4 16.Qa2 (16.Qc3 a5+=) 16...Bd7 (16...a5 17.f3=) 17.Nb1 (17.f3 ef3 18.Rf3 Bc6+=) 17...c6 18.Nc3 Rc8 (18...a5 19.ba5 Be6 20.d5=) 19.Rfd1 White prepares the advance d5 (19.f3 ef3 20.Rf3 Qe6=) 19...Be6 20.d5 cd5 21.cd5 Bd7 22.Ne2 Qf7 23.Nf4 Ng4 (23...Ba4 24.Rf1=) 24.Ne6 Be6 25.de6 Qe7 26.Bg7 Kg7 27.Qd5 Ne5 (27...Nf6 28.Qb5=) 28.Bf1 (28.Rc8 Rc8 29.Qd6 Qd6 30.Rd6 Rc1 31.Bf1 Kf6=) 28...a6 (28...Rc1 29.Rc1 Rf6 30.Qa5+=) 29.b5 (29.Rc8!? Nf3 30.Kg2 Rc8 31.Qd6 Qd6 32.Rd6+/–) 29...ab5= 30.Bb5 (30.Rc8 Nf3 31.Kg2 Rc8 32.Qd6 Qd6 33.Rd6 Ne1 34.Kh3 Nc2 35.Bb5 Na3+=) 30...Kf6 (30...Rc1 31.Rc1 Nf3 32.Kg2+=) 31.a4 (31.Rc8 Rc8 32.Bd7 Nd7 33.Qb7 Rb8 34.Qd7 Qd7 35.ed7 Ke6=) 31...Rfd8 (31...Rc1 32.Rc1 Rb8 33.a5=) 32.a5 (32.Rc8 Rc8 33.Kg2 Qe6 34.Qb7 h6+=) 32...Rc7 (32...Rc1 33.Rc1 Rb8 34.Kg2=) 33.Kg2 (33.Rc7 Qc7 34.Be2 Qe7+/–) 33...Rdc8 (33...Rc1!? 34.Rc1 Rb8+=) 34.Rc7+/– Rc7 (34...Qc7 35.Qd6 Qd6 36.Rd6=) 35.Qd6 Qd6 36.Rd6 Rc5 (36...Ke7 37.Rb6+=) 37.Rb6+/– Rc7 (better is 37...Nd3+/–) 38.Rd6 (better is 38.h3!?+/–) 38...Rc5= 39.Rb6 Rc7 40.Be2 (better is 40.h3!?+/–) 40...Nc6= 41.Rb5 (41.f3 ef3 42.Bf3 Na5=) 41...Ke6 42.Bc4 Kf6 43.Rc5 Ke7 44.a6 (44.f3!?=) 44...ba6+= 45.Ba6 Kd6 46.Rc1 Ra7 ½–½. Diaz Lombardo,Isidro (2000) – Hack,Bolivar (2000), Fide Mercenarios 1st, 1994.

5.d4 e4

6.c4 d5 7.cd5 Nd5 8.Bc4 (8.Nc3 Be6=) 8...Be6 9.Bd5 (9.Qb3 c6=) 9...Bd5 10.Nc3 c6 (10...a5 11.b5=) 11.Nd5 Qd5 12.Ne2 Nd7 (12...a5 13.Nc3 Qd7 14.ba5=) 13.Nf4 Qf7 14.d5 cd5 15.Qd5 Qd5 16.Nd5 0–0–0 (16...Bd6!?=) 17.Rc1 Kb8 18.0–0 Rg8 19.Rfd1 (19.Nf4 Nf6+/–) 19...Bd6+= 20.Bd4 g6 21.g3 (21.f3 Rge8+=) 21...Be5 (21...Rc8 22.f3 ef3 23.Kf2=) 22.b5 (22.Kg2 Rge8=) 22...Bd4 (22...Bd6 23.a4=) 23.ed4+= (worse is 23.Rd4 Ne5 24.Kg2 Nf3+=) 23...Rge8 24.a4 Re6 25.a5 Rd6 26.Nb4 (26.Ne3 Nf6 27.Rc4 Nd5=) 26...Ne5 27.d5 Rc8 28.Rc8 Kc8 29.a6 (better is 29.Kf1!?=) 29...ba6–/+ 30.Rc1 (30.Nc6 Nf3 31.Kg2 Kb7 32.ba6 Ka6–/+) 30...Kd7–+ 31.Na6 Rd5 32.Rc7 Kd6 33.Rh7 Rb5 34.Nc7 Rb1 35.Kg2 a5 (35...Rb8 36.h4–+) 36.Ne8 Kc5 37.Rc7 Kb6 (37...Kd4 38.Ra7 Ra1 39.Nc7–+) 38.Re7 (38.Rc8 Rd1 39.Rb8 Kc5–+) 38...Nc6 39.Rg7 a4 40.Nd6 Kc5 (40...Rc1 41.Rg8–+) 41.Nb7 Kd5 42.Rd7 Ke5 43.Rc7 (43.Nd8 Nd8 44.Rd8 a3–+) 43...Nd4 44.Na5 (44.Rc5 Kf6 45.Nd6 Ke6–+) 44...Nf3 45.h4 (45.Nc4 Kd4–+) 45...Ne1 (better is 45...Rg1!? 46.Kh3–+) 46.Kh3 Nd3 47.Rc2 (47.Kg2 Ra1 48.Nc4 Kd4–+) 47...Rh1 48.Kg2 Ne1 (48...Ne1 49.Kh1 Nc2–+) 0–1. Siluk,Zygmunt (2040) – Gunajew,Rafal (2225), MPN Poland, 2007.

6.c4 Be7 7.Nc3 0–0 8.f3 d5 (8...a5!?+=) 9.cd5= Nd5 10.Nd5 Qd5 11.Qc2 Nc6?? (better is 11...Be6=) 12.Bc4+– Qc4 13.Qc4 Kh8 (13...Rf7 14.d5 Nd8 15.fe4 fe4 16.Qe4+–) 14.Ne2 (better is 14.d5 Nd8+–) 14...ef3 15.gf3 Bd7 (15...Bd6 16.f4+–) 16.0–0–0 (16.d5!? b5 17.Qc2 Bh4 18.Kd2 Nd8 19.Qc7 Rf7+–) 16...Bf6 17.d5 Ne5 18.Qc7 (better is 18.Be5 Be5 19.Nd4 f4+–) 18...Rac8 19.Qc8! (19.Be5?! Be5 20.Qc8 Rc8 21.Kd2 Kg8+–) 19...Rc8 (19...Bc8 20.Rhf1 Combination; 19...Rc8 20.Kb1 Combination) 20.Kb1 Ba4 21.Rc1 Rd8 22.Rhd1! Nf3 (22...Bd1 23.Rd1 Combination) 23.Bf6 gf6 24.Rd3 (better is 24.Rh1 Nd2 25.Kb2+–) 24...Bb5+= 25.Rcd1 Bd3 26.Rd3 Nh2 27.Nf4 (27.Ng3 f4 28.ef4 Ng4+/–) 27...Nf3 28.Ne6 Rc8?? (better is 28...Re8+=) 29.d6+– Ng5 (29...Ne5 30.d7 Nd7 31.Rd7 Re8+–) 30.Ng5 (better is 30.d7 Rc1 31.Kc1 Ne6 32.Rc3+–) 30...fg5+= 31.d7 (better is 31.Rd5+=) 31...Rd8–+ 32.Rd5 Kg7 (32...h6!?–/+) 33.Rf5+= Rd7 34.Rg5 Kf6 35.Rc5 Re7 36.Rc3 h5 37.Kc2 h4 38.Kd2 Kg5 39.Rc1 h3 40.Rh1 Rh7 41.Ke2 h2 42.Kf2 Kg4 43.Kg2 Rh3 44.Kf2 (44.Rh2 Rh2 45.Kh2–/+) 44...Kf5 45.a4 Ke4 (45...Rh4!? 46.Kf3 Rb4 47.Rh2 Ra4 48.Rh5 Ke6–/+) 46.Kg2= Re3 47.Kh2 (47.Rh2?? Re2 48.Kg3 Rh2 49.Kh2 Kd4–+) 47...Rd3 48.Re1 Kd4 49.Re7 Ra3 50.a5 b6 51.Ra7 ba5 52.Ra5 Rb3 53.b5 Kc5 54.b6 Kb6 55.Rh5 Rb2 56.Kg3 Rb3 57.Kg4 Rb4 58.Kg5 Rb5 59.Kg6 Rb2 60.Kg5 Kc6 61.Rh6 Kd5 62.Rh5 Ke4 63.Rh4 Ke5 64.Rh5 Rg2 65.Kh6 Kf6 66.Ra5 Rh2 67.Rh5 Rg2 68.Ra5 Rg8 69.Ra6 Kf7 70.Ra7 Ke6 71.Ra6 Kf5 72.Ra5 Ke4 73.Ra4 Kd3 74.Ra3 Kc2 75.Ra2 Kb1 76.Ra7 Rh8 77.Kg7 Rh1 78.Rb7 Kc2 79.Rc7 Kd3 80.Rd7 Ke4 81.Re7 Kd5 82.Rf7 Kd6 83.Rf6 Ke5 84.Ra6 Rg1 85.Kf7 Rf1 86.Ke7 Rh1 87.Kd7 Kd4 88.Kc6 Rh6 89.Kb5 Rh5 0–1. Fournier,Frederic – Filip_Aki, Partie evaluee, 5m + 0s, 2009.

6.c4 Be7 7.Nc3 Be6 8.h4 (8.Nh3 a5= (8...0–0 9.d5 Bc8 10.Be2 a5 11.0–0 Nbd7+=; 8...Bd7 9.Be2 a5 10.b5 c6 11.0–0 cb5+=) 9.d5 Bd7 10.b5 0–0 11.Be2 Ng4+=; 8.d5 Bd7 9.Nh3 a5 10.b5 0–0 11.Be2 Ng4+=) 8...d5 (8...0–0 9.d5 Bd7 10.h5 a5 11.h6 g6=; 8...a5 9.d5 Bd7 10.h5 0–0 11.Be2 ab4=) 9.c5 (9.Nh3 dc4 10.Nf4 Bf7= 11.d5 a5=; 9.Nge2 dc4 10.Nf4 Bf7 11.d5 a5=) 9...Bf7 (9...Ng4 10.h5+= Bh4 11.g3 Bf6=) 10.Be2 (10.h5 0–0 11.Be2 a5=) 10...Nbd7 (10...c6 11.Nh3 0–0=) 11.Nh3 (11.h5 0–0=) 11...Nf8 (11...0–0=) 12.Ng5 Ne6 13.Qa4 c6 14.b5 Qc7 15.Ne6 Be6 16.g3 (16.h5 0–0=) 16...0–0+= ½–½. Etmans,Maarten D (2025) – Boschma,Bouwe (2315), Dutch CC Championship KE08, 2005.

6.Bc4 d5+= 7.Bb3 Bd6 8.c4 c6 9.Nc3 Be6 10.cd5 cd5 11.Nb5 Be7 12.Rc1 Nc6 13.Ne2 0–0 14.Nf4 Bf7 15.Nc3 Rc8 (15...Qd7 16.0–0=) 16.0–0 (16.b5 Na5 17.Ncd5 Rc1 18.Ne7 Kh8 19.Bc1 Nb3 20.Nf5 Qc8=) 16...g5 17.Nh3 h6 18.Qd2 Kh7 19.Bd1 Bd6 Black prepares f4 20.Kh1 (20.Be2 Be6 21.Kh1 f4+=) 20...Ne7 (20...Be6 21.Be2=) 21.Ng1 f4 22.Qe1 Bb8 23.g3 f3 24.Nf3 (24.Ba4!?+=) 24...ef3–/+ 25.Bf3 Bg6 26.e4? (26.Qe2 Qd7–/+) 26...de4 (26...Ne4!? 27.Kg2 Nc3 28.Rc3–+) 27.Ne4 Rc1 28.Bc1 Ne4 29.Be4 Qd4 30.Bb7 Qe5 (30...Nd5 31.Qd2 Qd2 32.Bd2 Be4 33.Kg1–+) 31.Qd2 Qb5 32.Bg2 Be5 33.Qe3 Nc6 34.Rd1 Bg7 35.Kg1 (35.Rd7 Kh8–/+) 35...Rf7 (35...Re8 36.Qd2–+) 36.Rd6 Ne7 37.Re6 (37.Qc5 Qa4–/+) 37...Qd7 38.Qb3 Nf5 39.Re1 (39.Be4!? Re7 40.Re7 Qe7 41.Qd5–/+) 39...Nd4–+ 40.Qa2 Nf3 41.Bf3 Rf3 42.Bb2?? (better is 42.Qe6 Rd3 43.Qd7 Rd7 44.Kg2–+) 42...Qd2 (42...Qd2 43.Qe6 Rf2–+) 0–1. Paauwe,J – Montenegro Garcia,Marcos, HZ Open, Vlissingen NED, 1999.

6.d5 c6 7.Nc3=.

6.d5 Be7 7.Ne2 c6 8.Nf4 0–0 9.Bc4 g5?? (better is 9...Kh8+=) 10.dc6+– (10.dc6 Kh8 11.Ne6+–) 1–0. marre (1965) – NN, GameColony.com, 2003.

6.d5 Be7 7.Ne2 Nbd7 (7...0–0 8.Nf4=) 8.Nf4 Ne5 9.Be2 0–0 10.0–0 Kh8 (10...g5 11.Nh3 Nf7 12.Qd2+=) 11.Nc3 (11.c4 a5+=) 11...g5 (11...Bd7 12.b5+=) 12.Ne6 (12.Nh3 Nfd7+=) 12...Be6 13.de6 c6 14.Na4 (better is 14.Qb1!?+=) 14...Qc8+= 15.c4 (15.Nc5 dc5 16.Be5 Qe6+=) 15...Qe6 16.c5 (16.Qc2 f4 17.Rae1 Kg8 18.ef4 gf4+=) 16...d5 (16...f4 17.cd6 Bd6 18.ef4 gf4 19.f3–/+) 17.f4 (17.Qd2!?+=) 17...ef3–/+ 18.Bf3 Kg8 (18...Nc4 19.Re1–/+) 19.Bd4 Ne4 20.Rb1 (20.Ra2 Nc4–/+) 20...a6 (20...Nc4 21.Ra1–/+) 21.Nb6 Rad8 (21...Nf3?! 22.gf3 Nc3 23.Bc3 Qe3 24.Kg2 Qc3 25.Rb3=) 22.a4 (22.Rb2 Bf6–/+) 22...Rf6 (22...Nf3 23.Rf3 Rde8 24.Qd3–/+) 23.Be4 (23.Qc2 g4 24.Be2+=) 23...de4 (better is 23...fe4!? 24.Qh5 Rh6–/+) 24.Qb3= Qb3 25.Rb3 Re6 26.Rf5 Nd3 27.Rb1 Rf8 28.Rf8 (28.g4 h5=) 28...Bf8 29.Nd7 (29.Nc4 h6=) 29...Bg7+= 30.Bg7 Kg7 31.Nb6 (31.g4+=) 31...Rf6 (better is 31...a5!?–/+) 32.Nc4= Re6 (32...Kg6 33.a5=) 33.Nd6 (better is 33.a5=) 33...Ne5 (better is 33...b5!? 34.a5 h5=) 34.Nb7 (34.Ne4 Kg6 35.Nf2 h5+/–) 34...Nc4 (34...Nd3 35.Nd6+/–) 35.Nd8 (better is 35.Kf2+/–) 35...Re8? (better is 35...Rf6!?+/–) 36.Nc6+– Ne3 37.b5 ab5 38.ab5 Nd5 39.b6 e3 (39...Nf6+–) 40.b7 e2 41.Re1 (41.Re1 Nc3 42.b8Q Rb8 43.Nb8+–) 1–0. Kaellman,Ralf – Lardot,Derik, FIN–chT 1div C, 1997.

6.d5 Be7 7.h4 0–0 8.g3 (8.Nh3 a5+=) 8...Nbd7 9.Be2 Nb6 10.c4 Ng4 11.Nd2 Bf6 12.Qb3 a5 13.Rc1 ab4 14.ab4 Bb2 15.Qb2 Ne5 16.Nh3 Qf6 17.Qb3 c5 18.bc5 (18.Nf4 Na4+=) 18...Nbd7+= 19.Nf4 Nc5 (worse is 19...dc5 20.Ne6 Rf7 21.Rd1+=) 20.Qc3 Bd7 21.0–0 g6 (21...Ra2 22.Nh5 Qg6 23.Nf4+=) 22.Kg2 h6 23.f3 g5 24.hg5 hg5 25.Nh5 Qg6 26.Rh1 f4 27.ef4 gf4 28.Rcg1? (28.Rh4 fg3 29.Ng3–+) 28...ef3–+ 29.Bf3 fg3 30.Kf1? (30.Re1 Ra2 31.Re5 de5 32.Re1–+) 30...Ra1!! 31.Kg2 (31.Qa1 Qd3 Double attack) 31...Ra2 32.Rf1 Ne4 (32...Ne4 33.Qe3 Nd2–+) 0–1. Etmans,Maarten D (2010) – Oomen,A. M. J. G. M (2300), Dutch CC Championship KE09, 2006.

6.Nh3 d5 7.c4 a5 8.ba5 Ra5 (8...Nc6 9.a6 ba6 10.Nc3=) 9.cd5 (9.Nf4 b6=) 9...Nd5 10.Nc3 c6 (10...Be6 11.Nd5 Bd5 12.Nf4=) 11.Nd5 Qd5 (11...cd5 12.Nf4 Qd7 13.Qh5 Qf7 14.Qf7 Kf7 15.Bc3 Ra3 16.Ra3 Ba3 17.Nd5=) 12.Nf4+= Qf7 13.Qc2 Bd6 14.Bc4 Qe7 15.0–0 (15.d5 Ba3 16.Bc3 Rc5+=) 15...Ba3 (15...Bf4 16.ef4 Be6 17.Be6 Qe6 18.d5 Rd5 19.Bg7=) 16.Qd1 Rf8 (16...b6 17.Qh5 g6 18.Ng6 hg6 19.Qh8 Qf8+–) 17.Qb3+/– (17.Qb3 Bb4 18.Ra5 Ba5 19.Ba3+–) 1–0. Rohde,Friedhelm – Fiorito, corr ICCF WT–M–GT–346, 1994.

6.Nh3 Nbd7 7.c4 Nb6 8.Nf4 Bd7 9.Nc3 c6 10.d5 Ng4 11.Be2 Ne5 12.c5 (12.Qd4 Qc8+/–) 12...Nc8 (12...Nbc4 13.Bc4 Nc4 14.Qh5 Ke7 15.dc6 bc6 16.cd6 Nd6 17.Ng6 hg6 18.Qh8+–) 13.dc6 bc6 14.Ncd5 (better is 14.Rb1+/–) 14...Ne7?? (better is 14...cd5 15.Qd5 Ne7 16.Qd6 Nf7=) 15.Bh5 (better is 15.Be5 Nd5 16.Bh5 g6 17.Ng6 de5 18.Nh8 Ke7+–) 15...N5g6?? (better is 15...Nf7 16.Nf6! gf6 17.Bf6 Bg7 18.Bg7 Rg8 19.Bf7 Kf7+–) 16.Ne7 Qe7 17.Bg6 hg6 18.Ng6 Qg5 19.Nh8 d5 20.Qd4 Qh6 21.Qe5 Be6 22.h4 Kd7 23.h5 Qh8 24.h6! Qh7 25.b5 cb5 26.c6! (26.c6 Ke7 27.Qh2+–) 1–0. Fournier,Frederic (2215) – Bishop,David T (2145), Partie Libre, 1999.

5.Nf3 Be7

6.c4 b6 7.Be2 Bb7 8.d3 0–0 9.Nbd2 Nbd7 10.0–0 h5 (10...Ng4 11.d4+=) 11.h3 Qe8 12.Ng5 Qg6 13.h4 Rac8 14.Bf3 Bf3 15.Ndf3 Nh7 16.Nh7 Kh7 17.Ra2 (17.Qa4!? Rfd8 18.Qa7=) 17...e4+= 18.de4 fe4 19.Nd4 (19.Nd2 Bh4 20.Qa4 Rf7+=) 19...Bh4 20.Bc3 Bf6 21.Ne2 Bc3 22.Nc3 h4 23.Qd4 Rce8 24.Re2? (better is 24.f4!? ef3 25.Qh4 Kg8 26.Raf2 fg2 27.Rf8 Nf8 28.Rf3–/+) 24...h3–+ 25.g3 Rf3 26.Kh2 Nf6 (26...Ne5!? 27.Kh3 Rg3 28.fg3–+) 27.Kh3–/+ Re5 (27...Nh5 28.Rg1 Nf4 29.ef4–+) 28.Kg2 Rg5 (28...Rh5 29.Rh1 Rh1 30.Kh1 Qh5 31.Kg2 Rf5–+) 29.Rh1 (29.Ne4 Ne4 30.Kf3 Qf5 31.Kg2=) 29...Nh5?? (29...Kg8 30.b5 Rgg3 31.Kf1 Rg5–/+) 30.Qe4 Rfg3?? (better is 30...Rff5 31.Kg1 a5+–) 31.fg3 Rg3 32.Kf1 Kg8 (32...Qe4 33.Ne4 Rg4 34.Rh5 Kg6+–) 33.Qg6 Rg6 34.Rh5 1–0. Fournier,Frederic (2060) – afetycutufa (1925), Active (5/5), 2004.

6.Bc4 a5 7.b5=.

6.Bc4 c6 7.0–0 d5 (7...b5 8.Bb3=) 8.Be2 e4 9.Nd4 (9.Ne5 Nbd7+=) 9...0–0 10.c4 a5 11.cd5 (11.Qa4 Bd7=) 11...cd5 (11...Nd5!? 12.ba5 c5+=) 12.b5= Bd6 13.d3 (13.f4 Qb6=) 13...ed3 (13...Qc7 14.f4=) 14.Qd3+= Ne4 (14...f4 15.Nd2+=) 15.f4 (15.Nd2 Nd2 16.Qd2 f4+=) 15...Nd7 16.Ne6 (16.Nc3 Nb6+=) 16...Ndc5= 17.Nd8 (17.Nc5 Bc5 18.Nd2 Re8 19.Ne4 Re4=) 17...Nd3 18.Bd3 Rd8 19.Bd4 Be6 20.Ra2 (20.Rd1 Rac8=) 20...Rdc8 21.Rc2 (21.Rd1 Bc5=) 21...Rc2 22.Bc2 Rc8 23.Bd3 Bc5 (23...Kf7 24.Rd1+=) 24.Rc1= Kf7 25.Kf1 b6 26.Ke2 g6 27.Be4 de4 (27...fe4 28.Bc5 bc5 29.Nc3=) 28.Bc5 Rc5 (28...h6 29.Nd2=) 29.Rc5 bc5 30.b6 Bd5 31.Nc3 Bc6 32.Na4 Ke6?? (32...c4!?+=) 33.Nc5?? (better is 33.b7 Bb7 34.Nc5 Kd5 35.Nb7+–) 33...Kd6+/– 34.b7 (34.Nb3 Bb5 35.Kd2 Kc6+/–) 34...Kc7+= 35.Ne6 Kb7 36.Nf8 Kb6 37.Kd2 Kb5 38.Kc3 (worse is 38.Nh7 Ka4+=) 38...Ka4 39.Kb2 Kb5 40.Nh7 Kc4 41.Kc2 (41.Nf8!? Kd3 42.Ng6 Ke3 43.Ne7=) 41...Ba4+= 42.Kd2 Kb3 43.Nf8 (43.g4 Ka3 44.gf5 gf5=) 43...Be8 44.h3 Ka3 45.Kc3 (45.g4+=) 45...Ka4 (45...a4 46.g4+=) 46.Ne6 (46.g4 Ka3=) 46...Bf7= 47.Nd4 Ka3 48.g4 fg4 49.hg4 a4? (49...Be8 50.f5 gf5 51.gf5+–) 50.f5 (50.Nb5!? Ka2 51.Kb4+/–) 50...gf5 51.gf5 (51.Nb5 Ka2 52.gf5 Be8+/–) 51...Ka2 (better is 51...Be8!?+=) 52.f6 Kb1 53.Kb4 (53.Nb5+/–) 53...Be8? (53...Kc1 54.Ka4 Kd2 55.Nf5+–) 54.Ka3 (54.Nb5!?+–) 54...Kc1+/– 55.Nf5 Kd2 (55...Bg6 56.Ne7 Be8 57.Nc8+/–) 56.Nd6 Bg6 57.f7?? (better is 57.Nc4 Kc3 58.Ne5+/–) 57...Bf7= 58.Nf7 (58.Ne4 Ke3 59.Ka4 Kd4=) 58...Ke3 59.Nd6 Kd3 60.Ne4 Ke4 61.Ka4 ½–½. Gaftarnik,O – Minet,Steve (2145), Cappelle op, 1995.

6.Bc4 Nc6 7.0–0 d5 (7...e4 8.Nd4 Nd4 9.Bd4=) 8.b5 (8.Bb5 e4 9.Ne5 Bd7 10.Bc6 Bc6 11.Nc6 bc6=) 8...dc4 (8...Nb8 9.Bb3 e4 10.Ne5=) 9.bc6 e4 10.Nd4 (10.Ne5 b6=) 10...b6 (10...Rb8 11.f3=) 11.Qe2+= 0–0 (11...Bd6 12.f4+=) 12.Nc3 (12.Qc4 Kh8+/–) 12...a6 (12...Kh8 13.Qc4 Bd6 14.f3+=) 13.Qc4 Kh8 14.a4 (14.f3 Bd6+=) 14...Bd6 (14...Bc5 15.Nce2+/–) 15.Ba3 (15.f3 ef3 16.Nf3 Qe8+/–) 15...Ba3+= 16.Ra3 Qe7 (16...Ng4 17.f4+=) 17.Raa1 (17.Rb3 Qd6 18.Rb2 Rd8+/–) 17...Ng4 (17...Qd6+/–) 18.h3 (18.f4!?+/–) 18...Ne5= 19.Qb3 (19.Qe2=) 19...Qf6 (better is 19...Qd6!?=) 20.Nd5+/– Qf7 21.a5 b5 22.Nf4 (22.Nb4 Qf6+/–) 22...Qe8 (22...Qf6 23.Qc3+=) 23.Qb4 (23.Qa3 Rf6 24.Qc5 Kg8+/–) 23...Nc4 (23...Qf7 24.Qc5 Re8 25.Rad1+/–) 24.Rad1 Nd6 (24...Qf7 25.f3 ef3 26.Nf3+/–) 25.d3 (25.f3 ef3 26.Rf3 Qe5+–) 25...g5 (25...Qf7!?+/–) 26.Nd5+– g4?? (better is 26...Qf7 27.de4 fe4+–) 27.Nc7 Qg6 28.Na8 gh3 29.g3 f4 30.ef4 Rf4 (30...Bg4 31.Nc7 Bd1 32.Rd1+–) 31.Qd2 (31.Kh2 Rf6+–) 31...Rg4 (31...h2 32.Kh1 Rf8 33.Nb6+–) 32.Nb6 Rg3 (32...h2 33.Kh2 Kg8+–) 33.fg3 Qg3 34.Kh1 e3 35.Qh2 Qg6 36.Nc8 Nc8 37.Qe5 Kg8 38.Qd5 Kg7 39.Nf5 Kh8 (39...Kf8 40.Qd8 Kf7 41.Ne3 Qf5 42.Rf5 Kg7 43.Qf6 Kg8 44.Rg1) 40.Qd8 Qg8 41.Qd4 Qg7 42.Qg7 1–0. pierre – yect, internet, 2010.

6.Bc4 d5 7.Ba2 e4 8.Nd4 (8.Ne5 Be6 (8...a5 9.0–0 Qd6 10.d4 b5 11.ba5 Nbd7 12.Bc3 Qe6 13.Nd7 Qd7=; 8...Nbd7 9.0–0 a5 10.b5 Ne5 11.Be5 Be6 12.d4 Bd6 13.Nc3 c6=; 8...0–0 9.0–0 Be6 10.Nc3 a5 11.Ne2 Qd6 12.Nf4 Nbd7 13.d4 b5=) 9.Qe2 c6 10.0–0 Nbd7 11.f4 0–0 12.c4 c5 13.Nc3 Rc8+=; 8.Ng5 Bd6 (8...0–0 9.0–0 c6 10.f3 a5 11.b5 Qc7 12.Nc3 Bd6 13.fe4 h6+=; 8...a5 9.b5 0–0 10.0–0 Qd6 11.f3 a4 12.Nc3 h6 13.fe4 hg5+/–; 8...c6 9.0–0 0–0 10.f3 a5 11.b5 Qc7 12.Nc3 Bd6 13.fe4 h6+=) 9.f4 h6 10.Nh3 Be6 11.0–0 0–0 12.Nc3 c6 13.Ne2 a5+=) 8...Nc6 (8...a5 9.b5 (9.Bc3= ab4 10.ab4 c6 11.b5 c5 12.Ne2 Bd7 13.Nf4 c4=) 9...c5 10.Ne2 0–0 11.Nf4 g5 12.Bf6 Bf6 13.Nd5 Ba1=; 8...0–0 9.0–0 a5 10.f3 Nc6 11.Nc6 bc6 12.ba5 Be6 13.Bb3 Ra5=; 8...b6 9.b5 a6 10.a4 0–0 11.0–0 Bc5 12.f3 Rf7 13.Qe2 Qd7=) 9.c4 (9.0–0 0–0= 10.Nc6 bc6 11.c4 a5 12.Qa4 Qd6 13.f4 Bd7=) 9...Ne5+= 10.0–0 Nc4 11.Bc4 dc4 12.Qe2 Qd5 (12...a5 13.b5 Qd5+=) 13.Nc3 (13.Rc1 Bd6+= (13...Qe5+=)) 13...Qf7 (13...Qg8 14.Rfc1+=) 14.f3= ef3 15.Rf3 Bd7 (15...a5 16.Nf5 Bf5 17.Rf5=) 16.Nf5 0–0–0 17.Ne7 (17.e4 Bf5 18.Rf5 Qe6=) 17...Qe7+= 18.Qc4 (18.Rf4 Be6+=) 18...Be6= 19.Qf4 Rd2 20.Na4 (20.Rf2 Nh5 21.Qf3 Rf2 22.Qf2 Rf8=) 20...Rhd8 (20...Rf8!? 21.e4 Re2=) 21.Bf6+= Qf6 22.Qf6 gf6 23.Nc5 Bc4 (23...Bd5 24.e4 Bc4 25.Rc1= (25.Rf6?? Rd1 26.Rd1 Rd1 27.Kf2 Rf1 28.Ke3 Rf6–+)) 24.Rf4 (24.Ne4 Rd1 25.Rd1 Rd1 26.Kf2 f5+=) 24...b5 (24...Bd5 25.e4 Bc4 26.Rc1= (26.Rf6?? Rd1 27.Rd1 Rd1 28.Kf2 Rf1 29.Ke3 Rf6–+)) 25.h4 (25.a4 Rd1 26.Rd1 Rd1 27.Kf2 Rf1 28.Kg3 Rf4 29.Kf4 ba4 30.Na4 Kd7+/–) 25...Re2 26.Rf6 Rg8 27.Rf2 Re3 28.a4 Bd5 (28...ba4 29.Ra4 Kb8 30.Ra1+=) 29.Raf1 (29.Rd2 Bb7+/–) 29...Kd8? (better is 29...ba4!? 30.Rf8 Re8 31.Re8 Re8 32.Na4 Rg8+=) 30.ab5 Ke7 (30...Re5 31.Rd2 Ke7 32.Ra1+/–) 31.Rd1 (31.Ra1+–) 31...c6 (31...Re5!?+/–) 32.bc6 (32.Ra1 cb5 33.Ra7 Ke8+–) 32...Bc6 33.Ra2 (33.Ra1 Ra8+–) 33...a6 34.Na6 Ra8 (34...Rg4 35.h5+–) 35.Rdd2 Re1 36.Kf2 (36.Kh2 Rb1+–) 36...Re4 (36...Rh1 37.Re2 Kf7 38.Rec2+–) 37.Re2 Re2 (37...Rf8 38.Kg1 Rff4 39.g3+–) 38.Re2 Kd6 39.Nc5 Rb8 (39...Rf8 40.Kg3+–) 40.Re6 Kd5 41.Re4 h5 (41...Re8 42.Rf4+–) 42.Rf4 (42.g4!? hg4 43.Rg4 Rf8 44.Ke3 Re8 45.Re4 Re5+–) 42...Rg8 43.g3 Ra8 (43...Ke5 44.Nd3 Kd5 45.Rf6+–) 44.Rf5 (44.g4 Ra2 45.Ke3 Ra3 46.Kd2 hg4 47.Rg4 Rh3+–) 44...Kc4 45.Rh5 Ra1 (45...Rf8 46.Ke1 Kb4 47.Na6 Kb3 48.g4+–) 46.g4 Ra2 (46...Kb4 47.Nd3 Kc4 48.Ke3+–) 47.Kg3 (47.Ke3 Ra3 48.Kf4 Kb4+–) 47...Ra3 (47...Kb4 48.Re5+–) 48.Kf4 Kb4 49.Ne4 (49.Re5 Kc4+–) 49...Ra4 (49...Ra1 50.Rf5+–) 50.Re5 1–0. Filipek,Jakub (2370) – Hulshof,Peter (2220), Essent Open, Hoogeveen NED, 2002.

6.Bc4 d5 7.Bb3 e4 8.Nd4 0–0 9.c4 Nc6 10.cd5 Nd4 11.Bd4 Nd5 12.Nc3 c6 13.f4 (13.d3 Kh8+=) 13...Kh8 14.Nd5 cd5 15.0–0 Bf6 16.Bf6 Rf6 17.Qe2 d4 18.Qb5 Bd7 19.Qd5 Bc6 20.Qd8 Rd8 21.Rfd1 ½–½. Fournier,Frederic (1860) – Thomas Olivier (2125), Ch Oise, 2004.

6.Bc4 d5 7.Bb5 c6 8.Be2 e4= 9.Ne5 0–0 10.0–0 Nbd7 11.f4 Qc7 12.c4 a5 13.Qb3 Qb6=.

6.Bc4 e4 7.Nd4!? d5 8.Bb5 c6 9.Be2 =.

6.Bc4 e4 7.Ng5 d5= 8.Ba2 h6 (better is 8...0–0!?+=) 9.Bf6+= hg5 10.Bg7 Rh7 11.Bb2 Qd6 12.Qe2 (12.Nc3 c6+=) 12...c6= 13.c4 a5 14.cd5 (14.ba5 Nd7 15.cd5 Nc5=) 14...ab4= 15.dc6 bc6 (better is 15...Nc6!? 16.Qc4 Rh6 17.Qg8 Kd7=) 16.Qc4+/– Nd7 (16...Rh2?? 17.Qg8 Kd7 18.Rh2 Qh2 19.Be6 Kd6 20.Qc8 (worse is 20.Bc8 Qh1 21.Ke2 Qh5 22.f3 Nd7 23.ab4 Ra1 24.Ba1 ef3 25.gf3 g4+–) 20...Qh1 21.Ke2 Qh5 22.f3+–) 17.ab4 Ba6 (17...Kd8 18.Qg8 Nf8 19.Bd4 Qb4 20.0–0+/–) 18.b5! cb5 (18...Bb5 19.Qg8 Pinning; 18...cb5 19.Qd5 Double attack (19.Qd5 Decoy)) 19.Qg8 Nf8 20.Bg7 Rc8? (better is 20...Rg7 21.Qg7 Qf6 22.Qf6 Bf6+–) 21.Nc3 Rh2 (21...Rg7 22.Qg7 b4 23.Bf7 Kd8+–) 22.Rh2 Qh2 23.Bf7 Kd7 (23...Kd8 24.Ra6 Qg2+–) 24.Ra6 Qg2 25.Be6 Kc7 (25...Kd8 26.Qh8 f4 27.ef4 gf4 28.Bc8 e3 29.de3 fe3 30.fe3 Kc8 31.Bf8 Qg3 32.Kd2 Qg2 33.Ne2 Qd5 34.Ke1 Kb7+–) 26.Nb5 Kd8 (26...Kb7 27.Bc8 Kc8 28.Qc4 Bc5 29.Qc5 Kd8 30.Qf8 Kd7 31.Rd6#) 27.Rd6! 1–0. Pandurevic,Miro (2225) – Drmic,Tomislav (2310), CRO–ChT2c, 2009.

6.d3 0–0 7.Be2 b6 8.c4 Bb7 9.Nbd2 Nbd7 10.0–0 c5 11.b5 Qc7 12.Qc2 d5 13.Rad1 e4 14.de4 fe4 (14...de4!? 15.Ng5 Ng4 16.Bg4 Bg5=) 15.Ng5+/– dc4? (better is 15...Bd6 16.h3 Rae8 17.cd5 Bd5+/–) 16.Ne6 Qd6 17.Nf8 Rf8 18.Nc4 (worse is 18.Qc4 Nd5+–) 18...Qc7 19.Qc3 Nd5?? (19...a6 20.Bg4 Rd8 21.Be6 Kf8+–) 20.Qg7 1–0. Fournier,Frederic (1705) – Chistosillo, Active, 2007.

6.d3 b6 7.c4 Bb7 8.Be2 0–0 9.Nbd2 Nbd7 10.0–0 c5 11.b5 f4 12.ef4 ef4 13.Re1 Ne5 (13...Qc8!?+=) 14.Ne5+/– de5 15.Nf3 e4 16.de4 Ne4 17.Qd8 Rad8 18.Rad1 Bf6 19.Bf6 Nf6 20.Rd8 Rd8 21.Rd1 Rd1 22.Bd1 Ne4 23.Bc2 Nc3 24.Ne5 Ne2 25.Kf1 Nd4 26.Bb1 g5 27.f3 Kg7 28.Ng4 a6 29.a4 Ne6 30.Nf2 h5 31.Nd1 Nd4 32.Nc3 Kf6 (32...Kf7 33.Be4 Be4 34.Ne4 ab5 35.ab5+/–) 33.Ke1 (better is 33.Be4 Bc8 34.Nd5 Ke5 35.Nb6 ab5 36.cb5+/– (worse is 36.Nc8 ba4 37.Bb1 Nc6=)) 33...Ke5+= 34.Kd2 g4 35.Be4 gf3 36.gf3 Be4 37.fe4 Nf3 (better is 37...ab5!? 38.cb5 Nf3 39.Kd3 Nh2–/+) 38.Ke2+= Nh2?? (better is 38...Ng1 39.Kd3 ab5 40.ab5 Nf3+=) 39.ba6+– 1–0. Fournier,Frederic – Lillopavia, Partie evaluee, 2m + 1s, 2007.

6.Be2 0–0 7.0–0 b6 8.c4 Bb7 9.d3 (9.d4 e4 10.Ng5 Qc8+=) 9...Nbd7 10.Ng5 Re8 11.Bf3 Bf3 12.Qf3 c5 (12...g6!?+=) 13.Qf5+/– Nf8 14.Qf3 h6 (14...cb4 15.ab4 d5 16.b5+/–) 15.Ne4+– Ne6 16.Nf6 Bf6 17.e4 (17.Nc3!? Nc7+–) 17...Bg5+/– 18.Qe2 Nf4 19.Qd1 Rf8 20.Nc3 Qe8 21.g3 Ne6 22.Nd5 Nd4? (better is 22...Qg6+/–) 23.Bd4+– cd4 24.Nc7 Qg6 25.Na8 Ra8 26.Qg4 Rf8 (26...h5 27.Qd7 Qf6+–) 27.h4 1–0. Fournier,Frederic (1620) – Barndy (1755), Playchess.com, 2013.

6.c4 0–0

7.d3 Nc6 8.Be2 Be6 9.Nbd2 Qd7 10.0–0 Ng4 11.h3 Nh6 12.Nb3 f4 13.ef4 Rf4 14.Nh2 Raf8 15.Bc1 R4f6 16.Bh6 Rh6 17.Ng4 Bg4 18.Bg4 Qe8 19.Qe2 Rhf6 20.Rae1 Qg6 21.Qe4 Qe4 22.Re4 Rf4 23.Rf4 Rf4 24.Bf3 Nd4 (24...Nd8 25.Bd5 Kf8 26.Be4+=) 25.Nd4 (better is 25.Bd5!? Kf8 26.g3 Ne2 27.Kg2+/–) 25...Rd4+= 26.Rd1 b6 (26...c6!?=) 27.Bd5+= Kf8 28.Be4 h6 29.f3 Bg5 30.Kf1 Bf4 31.Ke2 Bg3 32.Rc1 Ke7 33.Rc2 Kd7 34.b5 Ke6 35.a4 g5 36.Rc1 h5 37.Rf1 h4 38.Rd1 Bf4 39.Rg1 Kd7 40.Rf1 Ke6 41.Rd1 Kd7 42.Rf1 Ke6 43.Rd1 Kd7 44.Ra1 Kc8 45.a5 ba5 46.Ra5 Kb8 47.Ra6 Bg3 48.Rc6 Bf4 49.Ra6 Bg3 50.Rc6 Bf4 51.Ra6 ½–½. Fournier,Frederic (1840) – oexiliado (1695), Active, 2008.

7.Be2 e4 8.Nd4 +=.

7.Be2 Be6 8.0–0 h6 9.d4 Nbd7 10.Nh4 Ne4 11.Ng6 Rf6 12.Ne7+/– Qe7 13.d5 Bf7 14.f3 Ng5 15.f4 Nh7 16.fe5 de5 17.e4 fe4 18.Rf6 Nhf6 19.Nd2 Bg6 20.c5 Nd5=+ 21.Bc4 N7f6 22.Nf1 c6 23.Ne3 Rd8 24.Ng4 Kh8 25.Ne5= Ne3?? 26.Qb3+– Kh7 27.Ng6 Kg6 28.Qe3 Ng4 29.Qf4 h5 30.Rf1 Rf8 31.Qd6 Qd6 32.cd6 Rf1 33.Bf1 Kf7 34.d7 Ke7 35.Bg7 Kd7 36.Be2 Ke6 37.h3 (37.h3 Nf6 38.Kf2+–) 1–0. rustic – henrigrob30, Live Game Caissa's Web, 2005.

7.Be2 h6 8.0–0 g5 9.d4 e4 10.Nfd2 c6 11.g3 (11.Nc3 Be6=) 11...d5 12.cd5 cd5 (12...Qd5?? 13.Bc4+–) 13.Nc3 Be6 14.Rc1 Na6 15.Ba6 ba6 16.Qe2 (16.Nb3 Qd6+=) 16...f4 (16...a5!? 17.b5 a6=) 17.ef4 gf4 18.Na4 (better is 18.gf4!? Qb6 19.Kh1+=) 18...Bh3 19.Rfe1 Qd7 (19...a5 20.Nc5+=) 20.Nc5 Qf5 21.Na6 (21.f3 ef3 22.Qf3 Bd6=) 21...Rf7 (21...Ng4 22.Rc3 e3 A) 23.fe3 fg3 24.hg3 Qf2 25.Qf2 Rf2–+ (worse is 25...Nf2 26.Nc7 Rad8 27.b5+/–); B) 23.f3 fg3 24.hg3–/+) 22.Nc7 Raf8 23.Nb5? (23.Rc3 fg3 24.Rg3 Kh7 25.Nd5 Nd5 26.Ne4 Nf4+=) 23...Rg7 (23...Ng4 24.Rc3 (24.Na7 fg3 25.f3 ef3 26.Nf3 Qf3 27.Qf3 Rf3 28.Nc6 Rf2 29.Ne7 Kf7 30.hg3 Rg2 31.Kf1 Nh2#) 24...e3 25.f3 (25.fe3 fg3 26.Qf3 Qf3 27.Nf3 Rf3 28.Rcc1 g2 29.Na7 Rf1 30.Rf1 gf1Q 31.Rf1 Rf1#) 25...ed2 26.Ra1–+) 24.Kh1?? (better is 24.Na7 e3 25.Nf1+=) 24...Ng4 25.Nc3 (25.Na7 Qh5 26.Kg1 fg3 27.fg3 Rf2 28.Qf2 Nf2 29.Kf2 Bg5–+) 25...fg3 26.fg3 Nf2 27.Kg1 Nd3 28.Rb1 Qf2 29.Qf2 Rf2 30.Nf1?? Nb2 31.Rb2?? Rb2–+ 32.Ne3 Rb3 33.Ncd5 Bg5 34.Nc3 Rf7 (34...Rf7 35.Ned5 Bd2–+) 0–1. Fournier,Frederic – Voinov_Stanislav (1655), Active, 2012.

7.Be2 h6 8.d4 e4 9.Nfd2 b6 10.Nc3 a5 11.b5 Bb7 12.0–0 c6 13.a4 cb5 14.cb5 Nd5?? (better is 14...Nbd7+=) 15.Bc4 Kh8 16.Bd5 Bd5 17.Nd5 Nd7 18.Ne7 (better is 18.Rc1!? Rb8+–) 18...Qe7 19.Qb3 Nf6 20.Rac1 Rac8 (20...Rfc8 21.Nc4 Qd8 22.Qa3+–) 21.Rc8 (21.Rc6!? Rc7+–) 21...Rc8 22.Rc1 Rc1 23.Bc1 d5 24.Ba3 (24.Qc3 Kh7+–) 24...Qc7 25.Qb2 f4 (25...Ng4 26.Nf1+–) 26.Qc1 (better is 26.ef4 Qf4 27.Nf1 Qc7+–) 26...Qd7 (26...Qc1 27.Bc1 fe3 28.fe3+–) 27.Qc6 (27.ef4 Kh7+–) 27...Qg4 28.ef4 (28.Qb6 Qd1 29.Nf1 f3 30.gf3 Qf3+–) 28...Qf4?! (28...Qe2 29.Nf1 Ng4 30.Qc1 Qf2 31.Kh1+/–) 29.Qc8 Kh7 30.Qc1 (better is 30.Bc1+–) 30...Ng4+/– 31.Nf1?? (better is 31.Qe1!? Qh2 32.Kf1 Qh1 33.Ke2 Qg2 34.Bd6+/–) 31...Qf2+= 32.Kh1 Qd4 33.Bb2?? (33.h3 Nf2 34.Kh2 Qa4 35.Bf8 Qb5 36.Qc7+=) 33...Nf2 (33...Qa4?! 34.Qc7 d4 35.Qf4 (35.Qb6?? Qd1 36.Bd4 Qf1 37.Bg1 e3–+) 35...Qb5 36.Bd4=) 34.Kg1 Nh3 35.Kh1 Nf2 (35...Qg1) 36.Kg1= Nh3 37.Kh1 Nf2 ½–½. Fournier,Frederic (1680) – MAZEIN_YuRIJ (1640), ChessOK.com, 2013.

7.Be2 h6 8.d4 e4 9.Nfd2 Be6 10.Nc3 Nbd7 11.0–0 a6 12.c5 (12.d5 Bf7=) 12...Qe8 13.Bc4 Bc4 14.Nc4 d5 15.Ne5 Ne5?? (better is 15...c6=) 16.de5+/– Ng4 17.Nd5 Rd8 18.Ne7 (better is 18.Qb3!? Kh7 19.Nf4+–) 18...Qe7+= 19.Qe2 (19.Qb3 Kh8+=) 19...Ne5= 20.Be5 Qe5 21.Rfd1 Qc3 22.g3 Rd3 23.Rdc1 Qb3 24.Rcb1 Qd5 25.Qa2 Rd8 26.Qd5 R8d5 27.Ra2 (27.Kf1 Kf7+=) 27...Kf7 28.h4 Kg6 29.Kg2 Kf6 30.a4 Ke5 31.b5 (31.a5 h5–/+) 31...Rc5 32.ba6 ba6 33.Rb5?? (better is 33.Kf1–/+) 33...ab5–+ 0–1. Fournier,Frederic (1730) – Igorek555 (1830), ChessOK.com, 2012.

4.a4 Be6

5.c4 Nf6 6.Be2 Nbd7 7.Nf3 h6 8.h3 Be7 9.Nh4 g5 10.Ng6 Rg8 11.Ne7 Qe7 12.Nc3 Qg7 Black plans g4 13.d4 g4 14.d5 Bf7 15.hg4 Ng4 16.Bg4 Qg4 17.Qg4 Rg4 18.Nb5 Rc4 19.Rh6 a6 20.Rh8 Nf8 21.Nc3 Rb4 22.0–0–0 Rg4 23.g3 0–0–0 24.Rdh1 Rg7 25.R8h6 Nd7 26.a5 Nc5 27.Kc2 Bg6 28.f3? (better is 28.f4–/+) 28...f4–+ 29.e4 fg3 30.Rg1 Bf7 31.Rh3 Rdg8 32.Ne2 g2 33.Ba3 Nd7 34.Bc1 Kd8 35.Be3 Ke8 (better is 35...c6!? 36.dc6 bc6 37.Kd3–+) 36.Bf2 Nf6 37.Rg3 (37.Kd2 Bh5–+) 37...Nh5 38.Rg7 Rg7 (38...Ng7?! 39.Rg2 Nh5 40.Rg8 Bg8 41.Be3–/+) 39.Rb1 Nf4 40.Ng1 Bg6 41.Kd2 c5 42.dc6 bc6 43.Rb8 Ke7 44.Rb6 Be8 45.Ra6 Ke6 46.Ra8 Bd7 47.a6 c5 48.a7 Re7?? (better is 48...Bc8!=) 49.Rc8!+– Bc6 (49...Bc8 50.a8Q Decoy) 50.Rc6 Ra7 51.Bc5 Ra2 52.Kc3 Ne2?? (better is 52...Kf7 53.Rd6 Ra1+–) 53.Ne2 Re2 54.Rd6 Kf7 55.Rd1 (55.Rd2 Re1 56.Rg2 Rc1 57.Kb4 Rd1+–) 55...Kg6 56.Kd3 Ra2 57.Rg1 Kg5 58.Be3 (better is 58.Ke3 Kh4 59.Bd6+–) 58...Kh4 59.Bc5?? (better is 59.f4 ef4 60.Bf4+–) 59...Kg3 60.Ke3 Kh2 61.Kd3 Ra5 62.Bf2 Ra2 63.Ke3 Ra3 64.Ke2 Ra2 65.Ke3 Ra3 66.Ke2 Ra2 ½–½. Timbang,Japar – William,Lee Kah Howe (1775), Bandar Seri Begawan BRU, Campomanes Mem, 2012.

5.Nf3 Nd7 6.Be2 Qf6 7.a5 0–0–0 =.

4.b5 Be6

5.a4 d5 6.d4 e4 7.Nd2 Bd6 8.Be2 Nd7 9.Ba3 Qe7 10.Bd6 Qd6 11.f3 f5 12.c4 c6 (12...dc4 13.fe4 (13.Nc4? Bc4 14.Bc4 Qb4 15.Kf2 Qc4–+; 13.Bc4?! Bc4 14.Nc4 Qb4 15.Nd2 Ngf6=) 13...c3 14.Nc4 Bc4 15.Bc4 fe4 16.Ne2=) 13.fe4 fe4 14.Bg4 (14.c5 Qc7=) 14...Ngf6 15.Bh5 g6 16.Be2 0–0 17.c5 Qc7 18.Nh3 Bh3 19.gh3 b6 20.bc6 Qc6 21.Bb5 Qe6 22.c6 a6 23.Ba6 Ra6 24.cd7 Qh3 25.Qe2 Ra7 26.Rg1 Qd7 27.Qd1 Kg7 28.Qb3 Ra6 29.Rg2 Rfa8 30.Nb1 (30.Qb4 Ng4 31.Ke2 Ra4 32.Ra4 Ra4 33.Qb6 Ra3–+) 30...b5! (worse is 30...Ra4 31.Ra4 Ra4 32.Qb6–+) 31.Rga2 (31.ab5 Ra5 Double attack (31...Ra1 Pinning; 31...Ra1 Deflection; 31...Ra5 Decoy); 31.Qb5 Ra5 Double attack (31...Ra5 Decoy; 31...Ra4 Zwischenzug)) 31...ba4 32.Qb4 R8a7 33.Nc3 Qh3 34.Re2 a3 35.Nb5 (35.Qc5 Ra5 36.Qb4–+) 35...Rb7 36.Ra3 Ra3 37.Qa3 Qh4 (better is 37...Rb5 38.Qe7 Kg8 39.Qd8 Kf7 40.Qc7 Nd7–+) 38.Rf2 Ng4?? (better is 38...Rb5 39.Qe7 Kh6 40.Qf6 Rb1 41.Kd2 Qg4 42.Qf4 Qf4 43.Rf4 Rb2 44.Kc3 Rh2–+) 39.Qf8 1–0. Martynov,Gleb – Ibragimov,Oleg, Kazan City–ch, 2007.

5.a4 Nf6 6.c4 Nbd7 7.Be2 Be7 8.d4 (8.Nf3 Qc8=) 8...0–0 (8...ed4 9.Bd4 Ne5 10.Nd2=) 9.Nd2 (9.Nf3 Ne4=) 9...Qe8 10.Qc2 Qg6 (10...ed4 11.ed4 Qg6 12.Bf3=) 11.Ngf3 e4 (11...Qg2?? 12.Rg1 Qh3 13.Ng5 Qh2 14.Ndf3+–) 12.Nh4 Qh6 13.g3 g5 14.Ng2 c6 15.f3 (15.h4 Ng4=) 15...ef3 16.Nf3 (16.Bf3 Qh3–/+) 16...Ne4 17.Bd3 (17.0–0!?–/+) 17...Ng3–+ 18.Rg1 Ne4 (better is 18...Nh5–+) 19.Nf4= g4 20.Ne6 (better is 20.bc6!? bc6 21.d5+=) 20...Qe6–/+ 21.d5? (better is 21.0–0–0!?–/+) 21...cd5–+ 22.cd5 Qh6?? (better is 22...Qg6–+) 23.Be4+= Qe3 24.Qe2 Qe2 (24...Qe4 25.Qe4 fe4 26.Rg4 Kf7 27.Nd2+=) 25.Ke2 fe4 26.Rg4 Kf7 27.Re4 Bf6 28.Bf6 Nf6 29.Re6 Rae8 30.Nd4 (30.Ng5 Kg6 31.Rg1 Kf5 32.Rf1 Kg5 33.Rff6 Rf6 34.Re8 Rh6=) 30...Nd5+= 31.Re8 (31.Rf1!? Kg8 32.Re8 Re8 33.Kd3 Re3 34.Kd2+=) 31...Re8–/+ 32.Kf2 Re4 33.Nf3 h6 34.Rd1 Ke6 35.Kg3? (better is 35.Nd4 Kd7 36.Kf3–/+) 35...Ra4–+ 36.Nd4 Ke5 37.Nf3 Ke4 38.Nd2 Kf5 39.Nf3 (39.Rf1 Ke6–+) 39...Rg4 40.Kh3 (40.Kf2 Rg2! 41.Ke1–+) 40...Nf4 0–1. Pan,Konstantin – Nikitin,Dmitry (1830), Ulyanovsk RUS, Povolje Open, 2014.

5.d4 Nd7 =.

5.Nf3 Nf6 6.Ng5 Bg8 7.Be2 =.

5.Nf3 h6 6.c4 (6.d4 e4 7.d5 Bf7=) 6...Nf6 (6...g5 7.d4 g4 8.Nfd2+=) 7.Be2 (7.d4 e4 8.d5 Bd7+=) 7...Be7 8.0–0 (8.d4 e4 9.Nh4 0–0+=) 8...0–0= 9.d4 e4 10.Nfd2 Nbd7 (10...d5 11.c5=) 11.Nc3 Nh7 (11...d5 12.Qb3+=) 12.f3 (12.Qc2 a6+=) 12...Bg5 13.f4 Be7 (13...Bf6 14.Nb3+=) 14.g4 (14.d5 Bf7+=) 14...g6 (14...Ndf6 15.Qc2=) 15.d5 Bf7 16.Rf2 Nhf6 17.g5 (17.gf5 gf5 18.Rg2 Kh7+=) 17...hg5= 18.fg5 Ne8 19.h4 Ne5 20.Nde4 (better is 20.a4!?+=) 20...fe4–/+ 21.Ne4 Kg7 (21...Ng7 22.Rf4–/+) 22.Bg4 (22.Qd4 b6=) 22...a6 23.Qf1 (23.ba6 Ra6 (worse is 23...ba6 24.Nc5=) 24.Qb3 c6+=) 23...ab5–/+ Black fights for the Initiative 24.Be6 (24.Nc5 Bg8 (worse is 24...dc5 25.Be5 Kg8 26.Rf7 Rf7 27.Be6+–) 25.Rf8 Bf8 26.Ne6 Be6 27.Be6 Qe7 28.cb5 Kh7–/+) 24...Bg8 (24...Be6 25.de6 Rf2 26.Qf2 bc4 27.Qf7 Kh8 28.Be5 de5 29.Qg6+–) 25.Bg8 (25.cb5!? Rf2 26.Qf2–/+) 25...Kg8 (25...Rg8?! 26.Nc5 Kh8 27.cb5 dc5 28.Be5 Ng7 29.Qd3=) 26.Rf8 Bf8 27.Nf6? (better is 27.cb5 Qd7 28.Qe2–+) 27...Nf6 28.gf6 (28.Be5 de5 29.Qf6 Qf6 30.gf6 bc4–+) 28...Kf7 (better is 28...Nc4!? 29.Bd4 Qe8 30.Qf3–+) 29.Be5 (29.Qh3 Kf6 (29...Qf6? 30.Rf1 Qf1 31.Qf1 Ke7 32.cb5+–) 30.cb5 Kg7–+) 29...de5 30.h5 Qf6 31.hg6 Kg6 32.Qg2 Qg5 (32...Qg5 33.cb5 Bc5 34.Qg5 Kg5–+) 0–1. Huelle,Gunter – Willberg,Frank, Leipzig VfB op 5th, 1998.

4.b5 Nf6

5.c4 a6 6.a4 (6.d4 e4=) 6...ab5 7.ab5 Ra1 8.Ba1 g6 (8...Be7 9.d4 Nbd7 10.Nf3=) 9.Nf3 (9.d4 ed4 10.Bd4 Bg7=) 9...Bg7 10.d4 e4 11.Nfd2 0–0 12.Be2 c6 (12...d5 13.0–0=) 13.Qa4 Kh8 (13...Be6 14.0–0=) 14.Nc3 Be6 15.0–0 Qc7 16.Rb1 Nbd7 17.bc6 (17.Qa7 c5=) 17...bc6= (worse is 17...Qc6 18.Qa7 Rb8 19.d5 Bd5 20.Nd5 (20.cd5?! Qc8+–) 20...Nd5 21.Bg7 (21.cd5 Qd5 22.Bb5 Qc5+–) 21...Kg7 22.cd5 Qd5 23.Bb5+–) 18.d5 (18.Qa6!?=) 18...cd5+=. Guest392283 – Fredek (2065), Freundschaftspartie, 5m + 0s, 2006.

5.c4 b6 6.d4 White fights for the Initiative 6...Nbd7 (6...e4 7.Ne2=) 7.Qf3 Rb8 (7...e4 8.Qf5 a6 9.Nc3+=) 8.Qf5+/– Nc5 (8...a6 9.Nf3+/–) 9.Qc2 ed4 10.ed4 Nce4 11.f3 Ng5 12.Bd3 Be7 13.Nc3 (13.f4 Ne6 14.f5 Nf4+/–) 13...0–0 14.Nd5 h6 (14...Nd5 15.cd5 a6 16.h4+–) 15.Ne7 Qe7 16.Ne2 Bd7 (16...a6 17.Bc1+/–) 17.0–0 Rbe8 (17...Qe3 18.Kh1+–) 18.Bc1+– Nf7 (18...Ne6 19.Bg6 Rd8 20.d5+–) 19.Nf4 Nh8 20.Bd2 Qd8 (20...c6 21.Qa4+–) 21.Rae1 Re1 (21...c6 22.bc6 Bc6 23.Ne6 Re6 24.Re6+–) 22.Re1 Re8 23.Re8 Qe8 24.Nd5 (better is 24.a3!?+–) 24...Nd5+/– 25.cd5 Bb5 26.Bh7 Kf8 (26...Kf7!?+/–) 27.Qc7+– Qe2 (better is 27...Qe7 28.Qb8 Be8+–) 28.Qd6 Kf7 (28...Qe7 29.Qb8 Be8 30.Be4+–) 29.Qf4 Ke7 (29...Ke8 30.Qb8 Kd7 31.Qa7 Ke8 32.Qb8 Kd7 33.Bf5 Ke7 34.Bb4 Kf6 35.Qd6 Kg5 36.h4 Kh5 37.Bg4 Kh4 38.g3 Kg5 39.Qf4 Kg6 40.Qf5) 30.Bb4 Kd7 31.Bf5 Ke8 32.Qb8 1–0. Anderson,Egart – Popp,Tony, corr, 1999.

5.c4 Nbd7 6.Nc3 Be7 7.Nf3 0–0 8.Qc2 Nc5 (8...Nb6 9.Be2=) 9.d4 ed4 10.ed4 Nce4 11.d5?? (11.Bd3!?+=) 11...Qe8 (better is 11...Ng4 12.Bd3 Ngf2–+) 12.Bd3= Qf7 (12...Nc3 13.Bc3 Bd8 14.Kf1 Ne4=) 13.0–0–0 (13.0–0!?+=) 13...Nc3 (13...a6 14.b6 cb6 15.Rhe1–/+ (15.Ne4? fe4 16.Be4 Ne4 17.Qe4 Bd7–+)) 14.Bc3+= Nd7 15.Rhe1 Nc5 16.h4 Nd3 (16...a6!?–/+) 17.Qd3 Bf6 (17...Bd7 18.Nd4=) 18.Ng5 (18.Bf6 Qf6 19.Qd4 Qd4 20.Nd4 Kf7+=) 18...Bg5= 19.hg5 Bd7 20.f4 a6 21.a4 ab5 22.ab5 Ra2 23.Rh1 Re8 (better is 23...Qe8=) 24.Rh7?? (better is 24.Rh2 Qe7 25.Rdh1 Qe3 26.Qe3 Re3 27.Bg7 Kg7 28.Rh7 Kg8 29.Rd7=) 24...Kh7–+ 25.Rh1 Kg8 26.Qh3 Kf8 (better is 26...Qg6!? 27.Bb2–+) 27.Qh8 Ke7 28.Bf6 (28.Qg7 Qg7 29.Bg7–+) 28...gf6 29.gf6 Kd8 (29...Kd8 30.Kb1 Bb5 31.Ka2 Bc4 32.Kb2 Rh8 33.Rh8 Kd7–+) 0–1. Krueger,Bernhard – Hieronymus,Andreas (1695), 5th Baunatal op, 1999.

5.c4 g5 6.Nc3 Bg7 7.a4 0–0 8.Nge2 f4 9.Qb3 Nbd7 10.d4 fe3 11.0–0–0?? (better is 11.fe3 ed4 12.ed4+=) 11...ed4–+ 12.Nd4 Nc5 (12...ef2?! 13.c5 Rf7 14.Bc4–/+) 13.Qc2 Ng4 14.f3 (14.Bd3 Nd3 (14...Bd4?! 15.Bh7 Kh8 16.Rd4 Rf2 17.Ne2–/+) 15.Qd3 Nf2 16.Qe3 Be5–+) 14...Nf2 15.Be2 (15.Rg1 Nd1 16.Nd1–+) 15...Nh1 16.Rh1 Bd4 17.h4 Bf5 18.Ne4 Be4 19.fe4 Qf6 20.Ba3 Qe5 21.hg5 Rf2 22.Bc5 Qc5 23.Qd3 Be5 24.Bg4 (24.Kd1 Qb4 25.g6 Qa4 26.Qc2 Qa1 27.Qc1 Qc1 28.Kc1 Re2 29.gh7 Kh8 30.Rh3 Rg2 31.Rf3 Ra2 32.b6 e2 33.Re3 Rf8 34.Kb1 Rb2 35.Kc1 Rf1) 24...Rd2 (24...Qb4 25.Qd5 Kf8 26.Qd4 Qa3 27.Kd1 Qb3 28.Ke1 Bd4 29.Rh7 Bc3) 25.Be6 (25.Qb3 Qd4 26.c5 Kg7 27.Rh7 Kh7 28.Qf7 Kh8 29.Qh5 Kg7 30.Qh6 Kf7 31.g6 Ke7 32.Qg5 Bf6 33.cd6 cd6 34.Qf6 Qf6 35.e5 Qf1 36.Bd1 Qd1) 25...Kg7 26.Qb3 Qd4 27.Bf5 (27.Rh7 Kh7 28.g6 Kg7 29.Qa3 Rh8 30.Bh3 Qc4 31.Qc3 Qf1) 0–1. Gagarkine,Nikolay (2005) – Sudnik,Pavel (2160), Saratov region op, 2008.

5.c4 g5 6.f4 gf4 7.ef4 e4 8.Be2 Bg7 9.Bh5 Kf8 10.Be2 h6 11.Qc2 Kg8 12.Nc3 Kh7 13.Nd1 Nbd7 14.Ne3 Nc5 15.Nh3 Be6 16.Nf2 a6 17.a4 ab5 18.ab5 Ra1 19.Ba1 Re8 20.h3 Qa8 21.Bd4 b6 22.Qc3 Rf8 23.0–0 Qd8 24.Nh1 Qd7 25.Ng3 Na4 26.Qa1 Nc5 27.Qc3 Na4 28.Qc2 Nc5 29.Ra1 (29.d3 Kg8+=) 29...Ng4 30.Qc3 Bd4 31.Qd4 Ne3 32.Qe3 (32.de3? Nb3 33.Qc3 Na1 34.Qa1 Qg7 35.Qg7 Kg7 36.Nh5 Kf7–+) 32...d5 33.cd5 Qd5 34.Ra7 Rf7 35.Nh5 Nb3 36.Rc7 Qd2 37.Qd2 Nd2 38.Rc6 Re7 39.Rb6 Bc4 40.Bc4 Nc4 41.Rc6 e3 (41...Na5 42.Rc5 e3+–) 42.Ng3 (42.Rc4 e2 43.Rc1 e1Q 44.Re1 Re1 45.Kf2 Rb1+=) 42...Nd2 43.Rh6! Kg8 (43...Kh6 44.Nf5 Double attack) 44.Nf5 Re4 45.Ng3 e2 46.Ne2! Re2 47.b6 Re1 48.Kf2 Rb1 49.Rc6 Kf7 50.f5 Nb3 (50...Rb3 51.g4+–) 51.g4 Na5 52.Rc5 Rb2 53.Kg3 Ra2 54.b7! (54.b7 Nb7 55.Rc7 Kf6 56.Rb7+–) 1–0. Savic,Draga (2180) – Nestorovic,L (2310), XIV Battle Of Senta, Senta SRB, 2010.

5.c4 g6 6.Nc3 Bg7 7.Be2 0–0 8.h4 (8.Nf3 e4 9.Nd4 c5=) 8...h6 (8...a6 9.h5 g5 10.h6+=) 9.Qc2 (9.d4 ed4 10.ed4 Re8=) 9...Nh7 (9...a6 10.Nf3+=) 10.Bf3 (10.Nf3 c5=) 10...e4 11.Be2 Nd7 12.d4 ed3 13.Bd3 Ne5 14.Be2 c6 (14...f4 15.ef4 Rf4 16.Nf3=) 15.Nf3= Be6 16.Ne5 Be5 17.Rd1 Qc7 (17...Nf6 18.bc6 bc6 19.f4 Bc3 20.Qc3+=) 18.0–0 (18.f4 Bf6=) 18...Rac8 19.Rd2 Rfd8 (19...Nf6 20.bc6 bc6 21.Qd3=) 20.Rfd1 Qe7 21.g3 (21.h5 gh5 22.bc6 bc6=) 21...g5 (21...Nf8 22.Qa4=) 22.f4 (22.hg5 hg5 (worse is 22...Ng5 23.f4+–) 23.Qa4 Qg7+=) 22...Bg7 (22...gf4 23.ef4 Bf6 24.Kh2=) 23.hg5 hg5 24.Ba3 (24.bc6 bc6 25.e4 fe4 26.Qe4 gf4 27.gf4 Nf6=) 24...Qf6 25.Rd6 (25.Bb2!?=) 25...Rd6+= 26.Rd6 Bf8 27.bc6 bc6 28.c5 Bd6 29.cd6 gf4 30.ef4 Qd4 31.Kg2 Nf6 32.Qd3 (32.Bf3 Qe3=) 32...Qd3+= 33.Bd3 Nd7 (33...c5!?+=) 34.Nd1= c5 35.Ne3 Exerts pressure on the isolated pawn 35...c4 (35...Rc6 36.Nf5 Kf7 37.g4 Bf5 38.Bf5 Rd6 39.Kf3=) 36.Bc2 (36.Bf5 Bf5 37.Nf5 Rb8 38.Ne7 Kf7+=) 36...Rc6 37.Ba4?? (better is 37.Bb4=) 37...Ra6–/+ 38.Bd7 Bd7 39.Bc1? (better is 39.Nc2–+) 39...Ra2 40.Kh3 c3 41.Nd5 Kf7 (41...Kf7 42.Nc3 Rc2–+) 0–1. Diviak,Rudolf (1850) – Liptak,Tomas (2080), liga 3A2, 2012.

5.c4 g6 6.d4 A) 6...e4 A1) 7.Nh3 a6 (7...d5 8.Nc3 a6 9.cd5 Nd5 10.Nd5 Qd5) 8.Be2 ab5 9.cb5 Be7 10.d5 c6; A2) 7.Nc3 a6 (7...Bg7 8.Nh3 0–0 9.Be2 a6 10.Qb3 Re8; 7...Be7 8.Nge2 a6 9.Nf4 ab5 10.cb5 d5) 8.Nge2 ab5 9.Nb5 Bg7 10.Nf4 0–0; A3) 7.Ne2 a6 8.Nf4 ab5 9.cb5 g5 10.Nh5 d5; A4) 7.Be2 a6 (7...d5 8.Nc3 a6 9.cd5 Nd5 10.Nd5 Qd5) 8.Nh3 ab5 9.cb5 d5 10.0–0 Ng4; B) 6...ed4 B1) 7.ed4 a6 (7...Bg7 8.Nf3 0–0 9.Be2 a6 10.a4 ab5; 7...d5 8.Nf3 Ne4 9.Nc3 Be6 10.Qb3 Nc3; 7...Qe7 8.Qe2 a6 9.Nc3 ab5 10.Nb5 Na6) 8.ba6 Na6 9.Nf3 Bg7 10.Be2 0–0; B2) 7.Bd4 Bg7 8.Be2 a6 9.Nf3 0–0 10.0–0 c5; C) 6...Bg7 7.de5 (7.Be2 ed4 8.Bd4 0–0 9.Nf3 c5 10.Bc3 a6) 7...Nfd7 (7...Ng4 8.Nf3 Nd7 9.Be2 Nde5 10.Bd4 0–0) 8.Nf3 a6 9.Be2 Ne5 10.Nc3 Be6; D) 6...Nbd7 D1) 7.Nf3 e4 8.Nfd2 a6 9.ba6 Ra6 10.Be2 c5; D2) 7.Nh3 Bg7 (7...a6 8.Be2 ab5 9.cb5 Bg7 10.0–0 Qe7; 7...Qe7 8.Be2 Bg7 9.0–0 0–0 10.Nc3 a6) 8.Be2 Qe7 9.0–0 0–0 10.Nc3 a6; D3) 7.de5 de5 (7...Ne5 8.Be2 Be6 9.Nf3 Nfd7 10.Nd4 Bf7) 8.Nf3 Bb4 9.Bc3 Qe7 10.Be2 Ne4; D4) 7.Be2 a6 (7...Bg7 8.Nf3 e4 9.Ng5 Qe7 10.0–0 a6; 7...e4 8.Nh3 a6 9.Nf4 Qe7 10.ba6 Ra6) 8.ba6 Ra6 9.Nf3 e4 10.Ng5 Qe7.

5.c4 g6 6.Be2 Bg7 (6...a6 7.d4 ed4 8.Bd4= Bg7 9.Nf3 ab5 10.cb5 c5; 6...Nbd7 7.d4 a6 8.ba6 ba6 9.Nc3 Rb8 10.Rb1 Bg7) 7.d4 e4 (7...Nbd7 8.Nf3= e4 9.Ng5 Qe7 10.Nc3 a6; 7...ed4 8.Bd4 Nbd7 9.Nf3 0–0 10.Nc3 Nc5; 7...Qe7 8.Nf3 e4 9.Nfd2 0–0 10.0–0 a6) 8.Nc3 (8.Nh3 0–0 9.0–0 a6 10.Nc3 ab5) 8...0–0 (8...a6 9.Nh3 ab5 10.cb5 Be6) 9.Nh3 Kh8 (9...a6 10.a4 ab5) 10.Ng5 (10.Nd5 c6= (10...Nd5 11.cd5 a6=); 10.0–0 a6) 10...h6 (10...a6=) 11.h4?? (better is 11.Nh3=) 11...hg5–+ 12.hg5 Nh7 13.Nd5 Kg8 (13...Qg5 14.Nc7 Qg2 15.Kd2 Qf2 16.Na8+/–) 14.Qb3 (14.Nf4!? Qg5 15.c5–+) 14...Be6 (14...Qg5? 15.Nc7 Qg2 16.Rf1+–) 15.Nf4 Bf7 (15...Ng5?! 16.Ng6 Rf7 17.Nf4–/+) 16.0–0–0 (16.Bc3 Ng5 17.Rd1 Nd7–+) 16...Nd7 (16...Ng5 17.d5–+) 17.Rh2 a6 (17...Qg5?! 18.Rdh1 Nhf6 19.Nh3–/+) 18.Rdh1 Ng5 19.d5 (19.a3 ab5 20.Qb5 Nb6–+) 19...Bb2 20.Qb2 Qf6 0–1. Franck,Mirko – Haucke,Alexander (2195), Schleswig Holstein–ch U18, 1999.

5.Bc4 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 c6 9.d4 (9.Nf3 Nbd7=) 9...Ne4 (better is 9...d5 10.Be2 Ne4–/+) 10.Qd3?? (better is 10.Nd2 Qa5 11.Bb2+=) 10...d5–+ 11.Bb3 (11.de5 Nc5 12.Qe2 dc4–+) 11...Qa5 12.Bc3 Nc3 13.Nc3 Bb4 14.Nge2 e4 15.Qd2 Qa1 (15...Qa1 16.Qc1 Qc1 17.Nc1 Bc3 18.Kd1 Ke7–+) 0–1. Leon Manas,Jose Francisco (1710) – Rodriguez Perez,David (2035), 4th Open Internacional Hotel Av, 2010.

5.Bc4 d5 6.Bb3 Bd6 7.Nc3 c6 8.a4 (8.Nf3!?=) 8...0–0+= 9.Ba3 (9.Nf3 Nbd7+=) 9...Ba3–/+ 10.Ra3 c5 11.d3 Kh8 12.h3 (12.Nf3 e4 13.Nd2 d4–/+) 12...Qd6 13.Ra1 Be6 14.Nf3 Nbd7 15.Ng5 (15.0–0 d4 16.Be6 Qe6+=) 15...Bg8 16.0–0 Rae8 (16...d4 17.ed4 cd4 18.Bg8 Kg8–/+) 17.e4? (better is 17.Ne2+=) 17...h6–+ 18.Nf3 d4 19.Bg8 Kg8 (19...dc3 20.Bc4 fe4 21.Nh4+=) 20.Nd5 (20.Nh4 dc3 21.Nf5 Qe6–+) 20...fe4 (20...Ne4 21.Nc7 Qc7 22.de4 fe4 23.Nd2–+) 21.Nf6 Nf6 (21...Rf6?! 22.de4 c4 23.Qe2–/+; worse is 21...gf6 22.de4 f5 23.Nh4+=; 21...Qf6?! 22.de4 Qe6 23.Qe2+=) 22.de4 (22.Nd2 ed3 23.cd3 e4–+) 22...Ne4 23.Qd3 (23.Ra3 c4 24.Qa1 Re6–+) 23...Nc3 24.Nd2 e4 25.Qc4 Kh8 26.Nb1 Qd5 (26...Nd5!? 27.Nd2 Nf4 28.Kh1–+) 27.Qd5 Nd5 28.Nd2 Nc3 29.Nb1 (29.Nc4 Kh7–+) 29...Ne2 30.Kh2 e3 31.f3 c4 32.Ra3 (32.Na3 Rc8–+) 32...Nf4 33.g3 (33.Rd1 Kh7–+) 33...Nd5 34.f4 (34.Ra1–+) 34...Nb4 35.c3 e2 (35...e2 36.Kg2 ef1Q 37.Kf1 Nd3–+) 0–1. Musselman,Charles (1995) – Sypien,Mateusz (2255), Quebec CAN, 2014.

5.d4 ed4 6.Bd4 Be7 7.Nf3 h6 8.Be2 Be6 9.0–0 Nbd7 10.c4 a6 11.a4 ab5 12.cb5 0–0 13.Nbd2 Ne4 14.Ne4 (14.a5 Bf6+=) 14...fe4= 15.Nd2 d5 16.Qb3 Kh8? (better is 16...Nf6!?=) 17.Ne4!+/– Qe8 (17...de4 18.Qe6 Double attack (18.Qe6 Pinning; 18.Qe6 Deflection; 18.Qe6 Decoy)) 18.Nc3 (18.a5!?+/–) 18...c5+= 19.Bg7 (better is 19.bc6!? bc6 20.Nd1+=) 19...Kg7+= 20.Nd5 Qf7 (20...Bd6 21.Bc4+=) 21.Qc3= Nf6 (21...Bf6 22.Nf6 Qf6 23.Qf6 Kf6 24.a5=) 22.Nf4 (better is 22.Nc7+/–) 22...Kg8?? (better is 22...Bd6=) 23.Ne6+– Qe6 24.Bc4 Nd5 25.Qb3 Rad8 26.f3 Kh8 27.e4 Bf6 28.Rad1 Bd4 29.Kh1 Qg6 30.Bd5 Rd7 31.f4 Rg7 32.Qh3 b6 33.Rd3 Qd6 34.Qh4 Qg6 35.Rg3 Qf6 36.Qf6 Rf6 37.Rg7 Kg7 38.g3 Rf8 39.Kg2 Re8 40.Kf3 Re7 41.Kg4 c4 42.Bc4 Re4 43.Kf5 Re7 44.Rd1 Bc5 45.Be6 Ra7 46.Rd7 (46.Bb3!? Re7+–) 46...Rd7 47.Bd7 Bg1 48.h3 Bf2 49.g4 Be1 50.Ke6 Bd2 51.f5 Bc3 (51...Be1 52.f6 Kf8 53.a5 Ba5 54.h4+–) 52.h4 Bf6 (52...Bd4 53.g5 hg5 54.hg5+–) 53.Bc6 (53.a5 ba5 54.g5 hg5 55.b6+–) 53...Bh4 54.a5! ba5 55.b6 Bg3 56.b7 Bf4 (56...Kf8 57.Ba4+–) 57.Kd7 (better is 57.Ke7 Bb8 58.f6 Kg6 59.f7+–) 57...Kf6 58.Kc8 h5 59.gh5 Kf5 60.Be4! Kg5 (60...Ke4 61.h6 Passed pawn) ½–½. Osmak,Yulia – Zhukov,Sergei, Stepichev Memorial, 2006.

5.d4 e4 6.d5 a6 7.a4 (7.ba6 Na6 8.Bb5 Bd7 9.Bd7 Nd7 10.Nh3 Nac5 11.Nf4=) 7...ab5 (7...Be7 8.Nh3 (8.Ne2 0–0 9.Nf4 Ng4 10.Be2 Bf6 11.Nc3=; 8.Be2) 8...Bd7 9.Nf4 0–0 10.Bc4 Ng4 11.Nc3=; 7...c6 8.c4 (8.dc6 bc6 9.c4 d5 10.Nd2 ab5 11.ab5=) 8...Be7 9.dc6 bc6 10.Nh3 0–0 11.Nf4=) 8.ab5 Ra1 9.Ba1 c6 (9...Be7 10.Ne2 0–0 11.Nf4=) 10.bc6 (10.dc6 bc6 11.Nh3=) 10...bc6 11.dc6 Nc6 12.Bb5 Qa5 13.Nc3 Bd7 14.Nge2 Be7 15.0–0 Nb4 (15...0–0 16.Nf4 Kh8 17.Qd2=) 16.Nd4+= g6 (16...Bb5 17.Ncb5 d5 18.Bc3+/–) 17.Qd2+/– d5 18.Bd7 Kd7 19.Nce2 (19.Nb3 Qa8+/–) 19...Ra8 20.Bc3 Qc5 21.Rb1 Ra4 22.Bb2 Qc4 23.Nc3 Ra6 24.Ncb5 Na2 25.f3 (25.Qd1 Ke8+=) 25...ef3= 26.gf3 Ke8 27.Qe1 Kf7 28.Qg3 (28.Ra1 f4=) 28...Rb6 (28...Nb4 29.Bc3=) 29.Ra1+= Nd7 30.Na3 Ba3 31.Ba3 Ra6 32.Qh4 Ra3 33.Qh7 Ke8 34.Qg6 Kd8 35.Qf5 (35.Qg5 Kc7=) 35...Ra6 (35...Re3?? 36.Qg5 Re7 37.Ne6 Ke8 38.Qh5 Rf7 39.Re1+–) 36.Qf7 Kc7 (36...Qc3 37.Qg8 Ke7 38.Rd1+=) 37.h4 Rf6 38.Qg8 Ra6 39.h5 Nc3 40.Ne6 (40.Ra6 Qa6 41.Qe6 Qc4+/–) 40...Kd6 41.Ra6 Qa6 42.Nf8 Qa1 43.Kg2 Nf8 44.Qf8 Kc6 (44...Ke6 45.Qh6 Kf7 46.Qg6 Kf8 47.Qf6 Ke8 48.h6+–) 45.Qf6 Kb5 (45...Kc5 46.h6 Qb2 47.Qe7 Kc4 48.Qc7 Kb4 49.Qb7 Nb5 50.Qd5 Qc2 51.Kh3 Qc8 52.Kh4 Qf8 53.Qe4 Ka3+–) 46.h6+– Qe1 (46...Qb2 47.Qf5 Ka5 48.h7+–) 47.h7 Ne2 48.c4! Ka4 (48...Kc4 49.Qc6; 48...dc4 49.Qe5) 49.Qc6 (49.f4 Qg1 50.Kf3 Qh1 51.Ke2 Qg2 52.Ke1 Qg1 53.Kd2 Qf2 54.Kd1 Qf1 55.Kc2 Qe2 56.Kb1 Qd1 57.Kb2 Qd2 58.Ka1 Qd1 59.Ka2 Qb3 60.Ka1 Qd1 61.Kb2 Qd2 62.Kb1 Qd1 63.Kb2=) 49...Kb3 50.Qb6 (50.Qb5 Ka3 51.Qa6 Kb3 52.Qb6 Kc2+/–) 50...Kc2 51.Qg6 (51.Qc7 Qg1 52.Kh3 Qg6 53.cd5 Kd3=) 51...Kd2+/– 52.Qg8 Ke3?? (better is 52...Qg1 53.Kh3 Qh1 54.Kg4 Qg2 55.Kh4 Qf2 56.Kg5 Qe3 57.Kg6 Qg1 58.Kf5 Qb1 59.Ke5 Qb2 60.Kd5 Qb7 61.Ke6 Qc6 62.Ke5 Qc7 63.Kf6 Qf4 64.Kg7 Qg3 65.Kf8 Qb8 66.Kf7 Qc7 67.Kg6 Qg3 68.Kf5 Qf4 69.Ke6 Qc4 70.Ke7 Qc7 71.Kf8 Qd6 72.Ke8 Qc6 73.Kd8 Qd6 74.Kc8 Qc6 75.Kb8 Qb6 76.Ka8 Qc6 77.Ka7 Qc7 78.Ka6 Qc6 79.Ka5 Qc5 80.Ka6 Qc6 81.Ka5 Qc5 82.Ka6 Qc6=) 53.Qe6+– Kd2 (53...Kd3 54.Qg6 Ke3 55.Qb6 d4 56.Qe6 Kd2 57.Qh6 Kd3 58.Qh2=) 54.Qd5 (54.Qh6 Kd3 55.Qh2 Qd2=) 54...Kc1 55.Qe5 Qg1 56.Kh3 Qh1 57.Kg4 Qh7 58.Qe2 Qg6 59.Kh3 Qh6 60.Kg2 Qg5 61.Kf1 Qh6 62.Qd3 ½–½. Preusse,Goetz (1960) – Boerner,Uwe (1775), corr H2124 D, 2006.

5.d4 e4 6.d5 Bd7 7.Bc4 a6 8.a4 c6 9.Nc3 ab5 =.

5.d4 e4 6.d5 Be7 7.Nh3 0–0 8.Nf4 a6 9.a4 Ng4 =.

5.d4 e4 6.Nh3 d5 (6...a6 7.Nf4 ab5 8.Bb5 c6 9.Be2 d5=) 7.c4 a6 8.ba6 Na6 9.Nf4 c6 =.

5.Be2 a6 6.a4 A) 6...Be6 7.Nf3 Be7 8.d4 e4 9.Ng5 Bg8 10.0–0=; B) 6...Be7 7.d4 (7.Nf3 0–0 8.0–0 ab5 9.ab5 Ra1 10.Ba1=) 7...e4 8.Nh3 0–0 9.d5 Ng4 10.0–0=; C) 6...ab5 7.ab5 Ra1 8.Ba1 Be7 9.Nf3 0–0 10.0–0=.

5.Be2 b6 6.Nf3 c5 7.0–0 Nbd7 8.d4+/– (8.Ng5 Qe7 9.f4 a6 10.Nc3 d5 11.ba6) 8...cd4 (8...Qe7 9.de5 de5 10.Bc4 Bb7 11.Ng5) 9.ed4 e4 (9...Qe7 10.de5 de5 11.Re1) 10.Ng5 Qe7 (10...Nd5 11.Bc4 Bb7 12.Ne6+/–) 11.Bc4 d5 12.Ba3 Nc5 13.Be2 (13.dc5?! dc4 14.cb6 Qe5 15.Qd8 Kd8 16.Nf7 Ke8 17.Ne5 ab6 18.Bf8 Rf8+=) 13...f4 14.Re1 (better is 14.Nc3+/–) 14...h6? (better is 14...Qc7 15.dc5 Qe5 16.Bh5 g6 17.Nh7 Nh5 18.Nf8 Rf8+–) 15.Bh5+– (15.dc5?! hg5 16.Bb2 Qc5+=) 15...Nh5 (15...Kd7 16.Nf7 Rg8 17.dc5 bc5+–) 16.Qh5 g6 (16...Kd7 17.Nf7 g5 18.dc5+–) 17.Qg6 Kd7 18.Ne4 (18.Qc6 Kd8 19.Qd5 Qd7 20.Nf7 Ke8 21.Qa8 Kf7 22.dc5 Bg7+–) 18...de4 (18...Kd8 19.dc5 Qg7 20.Qh5+–) 19.Qc6 Kd8 20.dc5 Qd7 21.Qa8 (21.Qa8 e3 22.fe3 fe3 23.cb6+–) 1–0. Verheye – Debaisieux, 1985.

5.Be2 Be6 6.Nf3 Nbd7 7.d4 e4 8.Ng5 Bg8 9.c4 g6 10.0–0 Bg7 11.Nd2 h6 12.Nh3 Bf7 13.f3 d5 14.Qb3 ef3 15.gf3 0–0 16.cd5 (better is 16.Nf4!?=) 16...Nd5–/+ 17.Bc4 N7b6 18.e4 Nc4 19.Nc4 Qh4 20.ed5 Qh3 21.Ne5 Qh4 22.f4 Rad8 23.Nf7 Rf7 24.Rae1 Rd6 25.Re8 Kh7 26.Re6 Rfd7 27.Re3 (better is 27.Rd6!? Rd6 28.Qf3–/+) 27...Rd5–+ 28.Rh3 Qe7 29.Re3 Qd8 30.Rfe1 Qh4 (30...Bd4? 31.Bd4 Rd4 32.Re8+–) 31.Rf1 Rd8 (31...c6 32.bc6 bc6 33.Re8–+) 32.Rh3 (32.Qc4–+) 32...Qg4 33.Rg3 Qe2 0–1. Huelle,Gunter – Randt,Karl Heinz (1780), Leipzig VfB op, 2003.

5.Be2 Be7 6.d4 e4 7.a4 (7.d5 a6 8.ba6 Na6 9.Nh3 0–0 10.0–0=; 7.Nh3 d5 8.c4 a6 9.ba6 Na6 10.Nf4=) 7...Nbd7 8.Nh3 d5 9.0–0 Nb6 10.a5 +=.

5.Be2 Be7 6.Nf3 Nbd7 (6...0–0 7.0–0 (7.Nc3 a6 8.a4 e4 9.Nd4 c5 10.bc6=) 7...a6 8.a4 ab5 9.ab5 Ra1 10.Ba1=; 6...a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 0–0 10.0–0=) 7.a4 (7.0–0 Nb6 8.a4 a5 9.ba6 ba6 10.a5=) 7...Nf8 (7...0–0 8.d4 e4 9.Ng5 Nb8 10.0–0=) 8.Nc3 (8.0–0 Ng6 9.Nc3 0–0 10.a5=) 8...Ng6 (8...Ne6 9.Nh4 f4 10.0–0=) 9.Bc4 (9.0–0 0–0= 10.Ng5=) 9...h6 (9...d5!? 10.Be2 0–0=) 10.Nd5+= c6 11.Ne7 Qe7 12.0–0 Be6 13.Be6 Qe6 14.d3 0–0 15.c4 Rfd8 16.Qc2 c5 (16...d5 17.c5=) 17.Rfd1 f4 (17...a6 18.b6=) 18.e4 (18.d4 Nd7+=) 18...Ne7 19.h3 Kh7 (19...Rdb8 20.a5+=) 20.Nh2 (20.a5 a6+=) 20...g5 (20...a6 21.ba6 ba6 22.Rab1=) 21.f3 (21.a5 a6+=) 21...h5 22.Qe2 Rg8 23.Kf2 Kg7 24.a5 Kf7 25.Rh1 (25.a6 b6=) 25...Rg7 (25...Ke8 26.Nf1+=) 26.Rhg1 (26.a6 b6=) 26...g4 (26...Ke8 27.Rh1+=) 27.hg4= hg4 28.Nf1 (28.Ng4 Ng4 29.fg4 Rag8=) 28...Rag8 29.Nd2 (29.a6 b6+=) 29...gf3 30.gf3?? (30.Nf3 Ke8 31.Ke1 Rg3–/+) 30...Rg1 (better is 30...Qh3 31.Rg7 Rg7–+) 31.Rg1+= Rg1 32.Kg1 Qh3 33.Qg2 Qg2 (33...Qg3 34.Kf1=) 34.Kg2 Ng6 35.Kh3 Kg7 36.Nf1 Kh6 37.Bc3 Kg5 38.Be1 Kh5=. Acevedo,Daiana – Ruiz,Martin, Magistralito Najdorf U14, 2002.

5.Ne2 g6 6.d4 (6.f4 Nbd7 7.Nec3 Bg7 8.Bc4 Nb6 9.Bb3=; 6.Nec3 Bg7 7.Be2 a6 8.a4 Be6 9.0–0=) 6...Nbd7 7.Nd2 Bg7 (7...Qe7 8.de5 de5 9.Nc1=) 8.Nb3 (8.Nf3 Qe7= 9.de5=; 8.de5 de5 9.Nc3=) 8...0–0 (8...Qe7 9.de5=) 9.c4 (9.Nc3 Nb6=) 9...Re8 (9...a6 10.Nc3+=) 10.Qc2 (10.c5 ed4 11.c6 de3 12.cd7 ef2 13.Kf2 Bd7+=) 10...a6 11.ba6 ba6 (11...Ra6 12.c5 d5 13.de5 Ne5 14.Nf4+=) 12.Na5 (12.c5 d5=) 12...c5+= 13.Nb3 (13.de5 Ne5 14.Nb3 Bb7–/+) 13...Qc7 (13...ed4!? 14.ed4 Ne4 15.dc5 Bb2 16.Qb2 Ndc5–/+ (worse is 16...Nec5 17.Rd1+=)) 14.d5= Nb6 15.Nc3 Bd7 (15...a5 16.Nb5 Qb8 17.a4=) 16.Nd2 (16.Bd3 Rab8=) 16...Rab8 17.Be2 Rb7 18.0–0 Reb8 19.Rfb1 Nc8 (19...Na4 20.Na4 Ba4 21.Qa4 Rb2 22.Qd1=) 20.a4 (20.Bc1 Ne7=) 20...h6 21.Ba3 Bf8 22.Rb7 Rb7 23.Rb1 (23.Nb3 Bg7=) 23...Be7 (23...Rb1 24.Qb1 Bg7 25.Qc2=) 24.Rb7 Qb7 25.Bd1 (25.Bd3 e4 26.Be2 Bf8+=) 25...Bd8 26.Nb3 Nb6 27.Na5 (better is 27.Be2!?+=) 27...Qc7–/+ 28.Qb1 (28.Qc1 Na4 29.Ba4 Qa5 30.Bd7 Nd7–/+) 28...Nbd5 29.Nd5 (29.cd5 Qa5 30.Bb2 Ne4–/+) 29...Nd5 30.Qd3 (30.Nb7 Nc3 31.Qd3 Qb7 (31...Nd1?! 32.Qd5 Kg7 33.Nd8 Qd8 34.Qd6+=) 32.Qc3 Qb1–+) 30...Qa5 (better is 30...Ne3!? 31.Nb7 Qb7 (worse is 31...Nd1 32.Qd5 Kh8 33.Qf7–+) 32.fe3 Be7–+) 31.Qd5–/+ Kg7 32.g3 (32.h3 Bc7–/+ (32...Ba4?! 33.Ba4 Qa4 34.Qd6=)) 32...Qb6 (32...Qc7 33.Bb2–/+) 33.h3 (33.a5 Qc6 (worse is 33...Qa5 34.Qd6 Qc7 35.Qa6+=) 34.Qd2 Bf6–/+) 33...Qc6 34.Qd2 f4 (34...Bf6 35.Bb2–/+) 35.g4 (35.ef4 Bh3 36.f3 Bf6–/+) 35...fe3–+ 36.Qe3 Bg5 37.Qd3 Be6 38.Bc2 Bf7 39.Qe2 Qd7 (39...Qc7 40.Qd3–+) 40.Bb2–/+ Qe6 41.Bd3 Qf6 42.Kf1 Be6 43.f3 (43.Qe4 Qf7–/+) 43...h5 (43...Bd7 44.a5–+) 44.Qe4–/+ hg4 (44...h4 45.Qb7 Qf7 46.Qf7 Kf7 47.Ke2–/+) 45.hg4 Bf7 46.Kg2 (46.Ke2 Qf4 47.Qf4 Bf4–/+) 46...Qf4 47.Qf4 Bf4 48.Kf2 Be8 49.Bc2 Bc6 50.Bc3 Bc1 51.Ba5 Bb2 (51...d5 52.cd5 Bd5 53.Bc3–/+) 52.Bc7 d5 53.Bd6 (53.Bb3!? dc4 54.Bc4 Ba4 55.Ba6–/+) 53...Bd4–+ 54.Ke2 dc4 55.a5 (55.g5 Bd5–+) 55...Bd5 (55...Kf6 56.f4 e4 57.Bc7–+) 56.Be7 c3 57.Bg5 Ba2 58.Kd3 (58.Bd3 c4 59.Be4 Bb3–+) 58...c4 59.Ke2 Bb3 60.Kd1 Kf7 61.Kc1 Bc2 62.Kc2 Ke6 63.Bd8 Kd5 64.Bf6 e4 65.fe4 Ke4 66.Bd4?? (66.Bd8–+) 66...Kd4 67.g5 Kc5 68.Kc3 Kb5 0–1. Wagle,Rainer Georg – Eisenbeiser,Amadeus, Baden–ch U14, 2000.

5.Nf3 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 Be6 9.d4 e4 10.Nfd2 (10.Ng5 Bg8=) 10...d5+= 11.c4 c6 (11...Be7 12.c5+=) 12.Qb3 Be7 13.Be2 0–0 14.0–0 Kh8 (14...dc4 15.Bc4 Bc4 16.Nc4=) 15.bc6 bc6 16.Bb2 Nbd7 17.cd5 Bd5 18.Bc4 Qc7 19.Bd5 Rb8 20.Qc2 Nd5 21.Ba3 Ba3 22.Na3 Nb4 23.Qc4 Nd3 24.Qe6 g6 25.Nac4 c5 26.Nd6 (26.f3 cd4 27.fe4 de3 28.Ne3 f4=) 26...Nf8= 27.Qd5 cd4 28.Qd4 Qg7 29.Qd5 h6 (29...Qg8 30.Nf7 Kg7 31.Qd4 Kf7 32.Qa7 Nd7 33.Qd7 Kf6 34.f3+/–) 30.N2c4 Kh7 31.f3 Nb4 32.Qd2 (32.Qd1 ef3 33.Qf3 Nd7+=) 32...ef3= 33.Rf3 Qa1 (33...Ne6!?=) 34.Rf1+= Qf6 (better is 34...Qa2!?+=) 35.e4+– Nc6 (35...Qg5 36.Qd4 (worse is 36.ef5 Qd2 37.Nd2 gf5+/–) 36...Nc6 37.Qd5+–) 36.ef5 Qd4 37.Qd4 Nd4 38.Ne5 (better is 38.f6!?+–) 38...gf5+/– 39.Nf5 Nde6 (39...Nf5 40.Rf5 Ng6 41.Nc4+/–) 40.Ng4 h5 41.Nf6 Kg6 42.Ne7 Kh6 43.Nfg8 (43.Rf5 Ng7 44.Re5 Rb6+/–) 43...Kh7 (43...Kg7!?+/–) 44.Rf7 Ng7 45.Nf6 Kh6 46.Nfg8 Kh7 47.Rf6 Ng6 48.Ng6 Kg8 49.Nf4 Rf8 (49...Rb2!?+/–) 50.Rf8+– Kf8 51.Kf2 Kg8 52.Kf3 Kh7 53.Ke4 Kh6 54.Ke5 Ne8 55.Ne6 Kg6 56.h4 Kh6 57.Nd8 Kg6 58.Ne6 Kh6 59.Nf4 Ng7 60.Nd5 Kg6 61.Ne7 Kf7 62.Nf5 Ne6 (62...Ne8+–) 63.Nh6 Ke7 64.Kf5 Kd6 65.Ng8 Nd4 66.Kg5 (66.Kg6!? Ne2 67.Kg5 Ke5+–) 66...Ne6 67.Kh5 Nf4 68.Kg5 Ng2 69.h5 Ke6 70.Nf6 Kf7 71.h6 Nf4 (71...Ne3 72.Nh5 Kg8 73.Ng7+/–) 72.Kf5 (72.h7 Ng6 73.Nh5 Nh8+–) 72...Ng6 73.Kg5 (better is 73.Ng4+–) 73...Nf8 74.Kf5 Ng6 75.Ne8 Nf8? (75...Ke8 76.Kg6 Deflection) 76.Ng7 (76.Nc7 Kg8+/–) 76...Kg8+/– 77.Kf6 (77.Kg5 Nd7+=) 77...Nh7 (77...Nd7 78.Ke6 Nc5 79.Ke5+=) 78.Kf5 Kf7?? (better is 78...Nf8=) 79.Ne6+– Nf8 ½–½. Sieber,Martin (1980) – Kana,Pavel (2150), Karvina Mayor's Cup, 2005.

5.Nf3 a6 6.ba6 Na6 7.Be2 Be7 8.0–0 c6 9.c4 e4 +=.

5.Nf3 Be7 6.Be2 (6.d4 e4 7.Nfd2 0–0+=) 6...0–0 7.0–0 Qe8 (7...Be6 8.d4=) 8.Nc3 (8.d4 e4 9.Nfd2 Be6=) 8...Kh8 (8...Be6 9.Ng5 Qd7 10.Ne6 Qe6 11.d4+=) 9.a4 (9.d4 e4 10.Nd2 d5=) 9...Be6 10.d4 (10.Ng5 Qd7+=) 10...e4 11.Ng5 Bg8 12.Nh3 (12.d5 Qg6 13.Nh3 c6+=) 12...Nbd7 (12...Nd5 13.Nd5 Bd5 14.Nf4+=) 13.f4 (13.d5 Qg6+=) 13...Nb6 14.Nf2 (14.a5 Nc4 15.Qc1 c6–/+ (worse is 15...Nb2 16.Qb2 Qg6 17.a6=)) 14...Bc4 (14...Nc4!? 15.Qc1 Qg6+=) 15.a5= Be2 16.Qe2 (16.Ne2 Nc4 17.Rb1 Ne3–+ (17...Na5?! 18.d5–/+; 17...Qb5?! 18.Bc3 Qc6 19.Bd2–+)) ½–½. Wohlleben,Manfred – Seele,Hartmut (2085), Budapest FS07 FM–A, 2002.

5.Nf3 g6 6.c4 Bg7 (6...a6 7.h3=) 7.Qb3 (7.d4 ed4 8.Bd4 c5=) 7...Qe7 8.Be2 (8.c5 Nbd7 9.cd6 cd6= (9...Qd6? 10.Ng5 Nd5 11.Nc3+/–)) 8...Nbd7 (8...e4 9.Nd4=) 9.d4 c5 (9...Ne4 10.0–0=) 10.de5 de5 11.Nc3 e4 Black threatens to win material: e4xf3 (11...Nb6 12.Nd5 Nfd5 13.cd5=) 12.Nd2 (12.Ng5 Ne5+=) 12...b6 (12...Nb6 13.h3=) 13.a4 (13.Rd1 0–0+=) 13...a5 (13...0–0 14.0–0=) 14.ba6 (14.Rd1 h5+=) 14...Ba6 Black has a new backward pawn: b6 15.0–0 0–0 16.a5 White threatens to win material: a5xb6 16...Rfb8 17.ab6 Rb6 18.Nb5 Kh8 (18...Ne8 19.Bg7 Ng7 20.Qc2=) 19.Rfd1 (19.Ra5 Nb8=) 19...Ne5 (19...Rbb8 20.Rac1=) 20.Nb1 The knight intends Nd2–b1–c3–b5 (20.Be5 Qe5 21.Ra5 Bb7=) 20...Rc8 Black has an active position (20...Ne8 21.N1c3 Nc7 22.Qa4=) 21.N1c3 (21.Ra4 Qe6 22.N1c3 Bb5 23.Nb5 Ne8=) 21...Bb5= 22.Nb5 White has the pair of bishops. The knight dominates 22...Ne8 23.Ra7?? throwing away the advantage (better is 23.Be5 Be5 24.Ra3=) 23...Nc6?? throws away the game (better is 23...Qa7! and Black can look forward to a comfortable game 24.Na7 Rb3 25.Nc8 Rb2–+) 24.Ra2 (better is 24.Re7 secures the win 24...Ne7 25.Rd7+–) 24...Nc7 25.Bg7 Qg7 26.Rad2 h6 (26...Qe5 27.g3+=) 27.Rd7 White threatens to win material: Rd7xg7 (27.Qa3 Ra6 28.Qc5+–) 27...Ne7? (better is 27...Qe5+= is a viable option) 28.Qa3 (better is 28.R1d6 Rb7 29.Qd1+–) 28...Nb5? (better is 28...Na6+–) 29.cb5 Qf6 (29...Rbb8+–) 30.Qa7 Re8 31.Bc4 Kg7 32.h3 (32.Rd8 makes it even easier for White 32...Rd8 33.Rd8 Rd6 34.Rg8 Kh7+–) 32...Kf8 (32...h5+– the last chance for counterplay) 33.Qc7 Rbb8 34.Qc5 (34.Re7!? and White can already relax 34...Qe7 35.Rd7 Rec8+–) 34...Rbc8 (34...Rec8 is still a small chance 35.Qb4 Rb6 36.Rd8 Rd8 37.Rd8 Kg7+–) 35.Qb4 Ra8 36.b6 Ra1 37.b7 Rd1 (37...Qe5+– doesn't get the bull off the ice) 38.Rd1 Qe5 (38...Rb8 39.Qa5 Kg7+–) 39.Qb6 Kg7 40.Rd7 (better is 40.Rd8 secures victory 40...Nc6 41.Re8 Qe8 42.Qc7 Kf6 43.Bb5+–) 40...Kf8 (40...Rb8+– praying for a miracle) 41.Rd8 Nc6 42.Re8 Qe8 43.Bb5 1–0. Ilia,Naim (1965) – Knopf,Roland (1815), Berlin Eckbauer op 4th, 2001.

5.Nf3 g6 6.Bc4 Bg7 7.Bb3 Nbd7 8.a4 (better is 8.Ng5!? Qe7 9.d4+/–) 8...Nc5+= 9.Bc4 e4 10.Nd4 Ng4 (10...d5 11.Be2+=) 11.h4 (11.Nc3!?+=) 11...Ne5 (11...d5 12.Be2+=) 12.Bd5 White prepares h5 12...Qe7 13.Kf1 a6 (13...Rf8!? 14.Nc3 f4 15.ef4 Rf4–/+) 14.Nc3 Ncd7 (14...h5 15.Ba3=) 15.h5 Nb6 16.hg6 (16.Qe2 ab5 17.hg6 hg6 18.Rh8 Bh8 19.Qb5 Kf8=) 16...hg6= 17.Rh8 Bh8 18.f3 (better is 18.ba6!? Ra6 19.a5+=) 18...Nd5–/+ 19.Nd5 Qf7 20.Nc3 Nc4 21.Bc1 ab5 22.Ndb5 b6 23.d3 Ba6 24.Rb1 c6 (better is 24...Bc3!? 25.Nc3 Ne5–/+) 25.dc4+= Qc4 26.Ne2 cb5 27.Qd6 ba4 (27...b4!? 28.Kg1 Qe2 29.Qc6 Ke7 30.Qa8 Qc2 31.Qa7 Kf8 32.Qa6 Qb1 33.Qc8 Kg7 34.Qc7 Kh6 35.Qh2 Kg7 36.Qc7 Kg8 37.Qd8 Kh7 38.Qh4 Kg7 39.Qe7 Kh6 40.Qh4 Kg7 41.Qe7 Kh6 42.Qh4 Kg7=) 28.Qg6= Kd8 29.Qb6?? (29.Qd6 Kc8 30.Rb6 Qe2 31.Kg1 Bb7=) 29...Kc8?? (better is 29...Kd7 30.Ba3 Qe2 31.Kg1 Be5= (31...ef3 32.Qd6 Kc8 33.Qe6 Kc7 34.Bd6 Kc6 35.Be5 Kc5 36.Qd6 Kc4 37.Qc6)) 30.Kg1+= ef3 31.gf3 Kd7 (31...Qc2 32.Ba3 Qb1 33.Qb1 Be2 34.Qf5 Kc7 35.Qc5 Kb8 36.Qb4 Kc8 37.Qf8 Kb7 38.Qe7 Kb6 39.Qd6 Kb7 40.Qd5 Kb6 41.Qa8+–) 32.Ba3?? (better is 32.Ng3=) 32...Rg8 (32...Qe2 33.Qd6 Kc8 34.Qe6 Kc7 35.Bd6 Kc6 36.Be5 Kc5 37.Qd6 Kc4 38.Qc6) 33.Ng3 (33.Qg6 Rg6 34.Ng3 Qc2 35.Rd1 Qd1 36.Kg2 Qf1 37.Kh2 Rh6 38.Nh5 Qf2 39.Kh3 Rh5) 33...Rg3 34.Kf2 Rf3! 35.Kf3 (35.Kf3 Qe2) 35...Qg4 (35...Qe2 36.Kg3 Be5 37.Kh4 Qg4) 36.Kf2= Qe2 37.Kg1 Qg4 (37...Qc2?? 38.Qd6 Ke8 39.Qe7) 38.Kf2 Qe2 39.Kg1 Qg4 (39...Qc2?? 40.Qd6 Ke8 41.Qe7) 40.Kf2 Qh4 41.Kg2 ½–½. Leon Manas,Jose Francisco (1750) – Ramirez Maillo,JA (1640), 4th Cuadrangular Gloria Palace. Thalass, 2012.

5.Nf3 g6 6.h3 e4 7.Bf6 Qf6=.

5.Nf3 h6 6.h4 (6.Be2 g5=) 6...g6 (6...Be6 7.c4+=) 7.d3 (7.Be2 Bg7=) 7...Bg7+= 8.Nbd2 (8.Be2 Be6+=) 8...Be6 9.c4 Nbd7 (9...a6 10.d4 e4 11.d5+=) 10.Qc2 (10.d4 e4 11.d5 Bf7=) 10...c6 (10...0–0 11.d4 e4 12.d5 Bd5 13.cd5 ef3 14.Nf3 Nd5 15.Nd4+=) 11.a4 (11.bc6 bc6 12.c5 Nc5 13.Ne5 de5 14.Qc5 Bd5=) 11...a6 12.Be2 0–0 (12...ab5 13.ab5 Ra1 14.Ba1 cb5 15.cb5+=) 13.0–0 Ng4 Black intends f4 (13...ab5 14.ab5 cb5 15.cb5+=) 14.e4 (14.h5 Qf6=) 14...f4 (14...Nc5!?+=) 15.d4 (15.h5 Qf6=) 15...Rc8 (15...ed4 16.h5=) 16.Qd3 White plans d5 (16.ba6 ba6 17.c5 ed4 18.Nd4 Bd4 19.Bd4 dc5=) 16...c5 (16...ed4 17.Bd4 Nc5 18.Qc3=) 17.d5+= Bf7 18.Rfe1 (18.a5 Qf6+=) 18...Bf6 (18...Qf6 19.h5+=) 19.g3 (19.h5 Ra8+=) 19...h5 (19...fg3 20.fg3 ab5 21.ab5+=) 20.Kg2 (20.gf4 Re8+/–) 20...Kg7 (20...fg3 21.fg3 Ra8 22.Rf1=) 21.Rh1 (21.gf4 Bh4 22.fe5 de5 23.Nh4 Qh4+/–) 21...Rh8 (21...fg3 22.fg3 Ra8 23.Rhf1=) 22.Nh2 (22.gf4 ef4 23.Bf6 Qf6+=) 22...Nh6 (22...Nh2 23.Rh2 Rf8 24.a5+=) 23.Ndf3 (23.gf4!? ef4 24.Bf6 Qf6 25.Nhf3+=). Acevedo,Daiana – Babula,Nestor, Najdorf U20 op, 2003.

5.c4 Be6

6.Nc3 Nbd7 7.Nf3 h6 8.d4 e4 9.Nd2 Be7 10.d5 Bf7 11.Nb3 b6 (11...Nc5!?=) 12.Nd4+/– 0–0 13.Nf5 Nc5 14.Be2 Bg6 15.Ne7 Qe7 16.h3 Nfd7 17.0–0 Qg5 18.a4 Bf5 19.Bg4 Bg4 20.Qg4 (20.hg4 Ne5 21.Ne4 Ne4–+) 20...Qg4 21.hg4 Nd3 22.Ba3 Rf7 (better is 22...Rae8!? 23.Rad1 N7c5+/–) 23.Ne4+– N7e5 24.Nd2 (better is 24.Rfd1 Nc5 25.Bc5 bc5 26.Nd2+–) 24...Ng4+= 25.Nf3 Raf8 26.Ra2 h5 27.Rd2 Nde5 28.Ne5 Ne5 29.Rd4 (29.Rc1 Ng4 30.Rcc2 a5+/–) 29...g5 (29...Ng4!? 30.Rg4 hg4+=) 30.f3 h4 31.f4 gf4 32.Rdf4 (32.ef4!? Rf5 33.Kh2+–) 32...Rf4 33.ef4 Nc4 34.Bc1 Kf7 35.f5 Kf6 36.Rf4 Rh8?? (better is 36...Ne5 37.Rh4 Rg8+=) 37.Rc4+– Rh7 (37...Kf5 38.Rc7 Ra8 39.Rc4+–) 38.Kh2 (38.Rf4!? Ke5+–) 38...Kf5 39.Bb2 Kg5 40.Kh3 Kf5 41.Bc3 Re7 42.Bd2 (better is 42.Kh4 Re4 43.g4 Kf4+–) 42...Re4 43.Rc7 (43.Re4!? Ke4 44.Kh4 Kd5+–) 43...Ra4 44.Re7 Rd4 45.Be1 Rd5 46.Ra7 Rb5 47.Bh4 (47.Kh4 Rb1 48.g4 Ke6+–) 47...Rb3 48.Kh2 d5 49.Re7 d4 50.Be1 d3 51.Rb7 Kf4 52.g3 (better is 52.Bd2!? Ke4 53.Re7 Kd5 54.Kg3+/–) 52...Kf3+= 53.g4?? (better is 53.Rb8+=) 53...Kg4–/+ 54.Kg2 Rb1 (54...Rb2 55.Bf2 Kf4+=) 55.Kf2+= Kf4 56.Bd2 Ke4 57.Rb8 b5 58.Re8 ½–½. Rush,Bradley – Fernandez,German, 62. LSS No Engine Cup Preliminary, 2012.

6.Nf3 a6 7.ba6 Na6 8.d4 =.

6.Nf3 a6 7.Nc3 ab5 8.cb5 Nd5 9.Nd5 (9.Qb3 c6=) 9...Bd5 10.Qc2 Qf6 (better is 10...Qd7!?=) 11.Qc7+/– Nd7 12.Bc4 Bc4 13.Qc4 Nb6 (better is 13...Qf7!? 14.d3 Nc5 15.Qf7 Kf7+=) 14.Qc7+– Na4 (14...Qd8 15.Qb7 Ra5+–) 15.Qb7 Rd8 16.Qc6 Kf7 (16...Ke7 17.Ba3 g5+–) 17.Qc4 d5 18.Qa4 Bd6 19.Rc1 (19.Qb3 Ke6+–) 19...Qe7 (19...Rhe8 20.Rc6 Re6 21.Qh4 Qh4 22.Nh4+–) 20.Qb3 Ke6 (20...Bb8 21.a4+–) 21.Rc6 Rd7 (21...h6 22.Ne5 Qg5 23.Nd3+–) 22.Ne5 Rc7 23.e4! Rc6 (23...fe4 24.Qh3 Combination) 24.Qd5 Kf6 25.Ng4 Kg6 (25...Kg5 26.Qf5 Kh4 27.g3 Bg3 28.hg3) 26.Qf5 1–0. pcmvr – salas (2170), net–chess.com, 2009.

6.Nf3 Nbd7 7.d4= e4 8.Nfd2 (8.d5 Bf7 9.Nd4 g6+=) 8...Be7 9.Be2 0–0 10.0–0 (10.d5 Bf7=) 10...c5 (10...d5 11.c5=) 11.a4 (11.d5 Bf7+=) 11...d5 12.cd5 (12.a5 Qc7=) 12...Nd5+= 13.Nc3 Nb4 14.d5 (14.dc5 Nc5 15.Bc4 Bc4 16.Nc4 Rc8–/+) 14...Nd5 (14...Bd5 15.Nd5 Nd5 16.Ne4 N7b6+=) 15.Nde4= Nc3 (15...fe4 16.Nd5) 16.Nc3 Ne5 17.Rc1 Rc8 18.Qc2 Qc7 19.Rfd1 Rfd8 20.Nb1 Rd1 21.Rd1 Bf6 22.h3 Qf7 23.Nd2 Ng6 (23...c4=) 24.Nc4 (24.Bf6 Qf6 25.Bf3 Rc7+=) 24...Be7 Black prepares f4 (24...Bb2 25.Nb2 Bb3 26.Qb3 Qb3 27.Bc4 Qc4 28.Nc4 Rc7+=) 25.b6 (25.Nd6 Bb3 26.Bc4 Bc2 27.Bf7 Kf8 28.Nc8 Bd1 29.Bg6 hg6+/–) 25...ab6= 26.Nb6 Rc6 (better is 26...Bb3 27.Qb3 Qb3 28.Bc4 Qc4 29.Nc4 Rc7+=) 27.a5 (27.Nc4 Bf6+=) 27...f4 (27...Bb3 28.Qb3 Qb3 29.Bc4 Qc4 30.Nc4+=) 28.e4 f3 (28...Bb3 29.Qb3 Qb3 30.Bc4 Qc4 31.Nc4 Re6+/–) 29.Bb5 (29.Bf3 Bb3 30.Qc3 Bd1 31.Bd1–/+) 29...Rd6= Black intends Bb3 30.Rd6 White fights for the Initiative 30...Bd6 31.Qd3 (31.Nc4 Bc7 32.g4 Nf4–/+) 31...Bc7 32.Qf3 Qf3 33.gf3 Bh3 34.Bc4 Kf8 35.Bd5 Nh4 36.Ba3 (36.e5 Ng6 37.f4 Ke7=) 36...Nf3= 37.Kh1 Bb6 (37...Bd6 38.Na4 b6 39.ab6+–) 38.ab6+= Bc8 (38...Ke8 39.Bc5 Bc8 40.Kg2 Ne1 41.Kg3+/–) 39.Bc5+/– Ke8 40.Kg2 Ne1 41.Kg3 g5 42.Be3 h6 43.f4 Nc2 44.Bd2 gf4 45.Bf4 Nb4 46.Bc4 (46.Bh6 Nd5 47.ed5 Bf5+/–) 46...h5+– 47.Be2 Ke7 48.Bh5 Be6 49.Be2 Nc6 50.Bc7 (50.Bg5 Kd7+–) 50...Nd4 51.Bf1 Bb3 52.Be5 Ne6 (52...Nc6 53.Bc3+/–) 53.Kf3 Bc2 54.Ke3 Nc5 55.Bg2 Ke6 56.Bd4 Nd7 (56...Nd3 57.e5 Ne5 58.Bb7 Nc4 59.Kf4 Nb6 60.Bb6+/–) 57.e5 (57.Bh3 Ke7+–) 57...Ne5 (57...Nb6 58.Bb6 Ke5 59.Bd4 Kd6 60.Bb7+–) 58.Bb7 Nc4 59.Kf4 Kd7 (59...Nb6 60.Bb6 Bb3 61.Ke4+–) 60.Bd5 (60.Be4 Be4 61.Ke4 Nb6 62.Ke5=) 60...Nd6 (60...Nb6 61.Bb6 Kd6 62.Bc4+–) 61.b7 (61.Ke5!? Bd3+–) 61...Nb7 62.Bb7 Ke6 63.Bf3 Bd3 64.Bc6 Kd6 ½–½. Kern,Michael – Winterlik,J, Hessen clubgame, 1989.

6.Nf3 Nbd7 7.Be2 h6 8.0–0 (8.d4 a6+=) 8...Qe7 (8...a6 9.ba6 Ra6 10.d4+=) 9.d3 (9.d4 Bf7+=) 9...g5 10.Nfd2 (10.d4 0–0–0=) 10...0–0–0 11.a4 f4 12.e4 (12.a5 Bg7=) 12...g4+= 13.f3 (13.d4 Rg8 14.d5 Bf7=) 13...h5 (better is 13...gf3 14.Bf3 h5+=) 14.g3? (better is 14.d4+=) 14...fg3–+ 15.hg3 h4 (15...gf3 16.Bf3 h4 17.gh4 Rh4 18.Bg2–+) 16.Kg2 (16.fg4 hg3 17.Bf3 Ng4 18.Qe2–+) 16...hg3 17.Rh1 Bh6 (17...Nh5 18.Nc3 Qg5 19.Nd5 Bd5 20.Rh5 Rh5 21.Bd4 Rh2 22.Kf1 g2 23.Ke1 ed4 24.Nf1 gf1R 25.Kf1 Qh4 26.Qe1 Qh3 27.Kg1 Qg2) 18.Nc3 (18.fg4 Bf4 19.g5–+) 18...Bf4 19.Nd5 (19.Bc1 Qg7 20.Nb3 Rh1 21.Qh1 Rh8 22.Bf4 ef4 23.Qh8 Qh8–+) 19...gf3 (better is 19...Bd5 20.cd5 Rh1 21.Qh1 Bd2 22.fg4 Bf4–+) 20.Nf3 Nd5 (20...Bd5 21.cd5 Ng4 22.Bc1–+) 21.cd5 Bg4 22.Qc2 Qg7 (22...Rdg8 23.a5 Bf3 24.Bf3 Qg5–+) 23.Rac1?? (23.a5 Rh1 24.Rh1 Rh8–+) 23...Nf6 (23...Bc1 24.Qc1 Rdf8 25.b6 Nb6 26.a5 Rh2 27.Rh2 Bf3 28.Bf3 gh2 29.Kf2–+) 24.Rcd1 (24.Rcf1 Rdg8 25.Nh4 Qg5–+) 24...Rh1 (24...Rh2 25.Rh2 gh2 26.Kh1–+) 25.Rh1 Rh8 26.Qd1 Nh5 (better is 26...Rh3! 27.Bc3–+) 27.Nh4 Nf6 28.Nf5?? (28.Nf3 Rh3 29.Bc3–+) 28...Bf5–+ 29.ef5 (29.Bf3 Rh2 30.Rh2 gh2 31.Kh1–+) 29...Rh1 (better is 29...Rh2 30.Rh2 gh2 31.Kh1 Be3–+) 30.Qh1 Ng4 (better is 30...Nd5!? 31.Bf3 Ne3 32.Kg1–+) 31.Bg4 Qg4 32.Qh8 Kd7 33.Qh7 Ke8 (33...Kd8 34.Qh8 Ke7 35.Qh7 Kf6 36.Qh8 Kf5 37.Qf8 Kg5 38.Qg8 Kh4 39.Qd8 Qg5 40.Qg5 Kg5 41.Bc3–+) 34.Qh8? (better is 34.Qc7!? Qe2 35.Kh3 Qh5 36.Kg2 Qh2 37.Kf3 Qb2 38.Qc8 Ke7 39.Qc7 Kf6 40.Qd6 Kf5 41.Qe6 Kg5 42.Qe7 Kg6 43.Qe6 Kg7 44.Qd7 Kf8 45.Qc8 Ke7 46.Qc7 Kf6 47.Qd6 Kf7 48.Qe6 Kf8 49.Qc8 Ke7 50.Qc7 Ke8 51.Qc8 Ke7=) 34...Kf7–+ 35.Qh7 (35.Qd8 Qe2 36.Kh3 Qh5 (36...Qb2?! 37.Qd7 Kf6 38.Qe6 Kg7 39.Qe7 Kg8 40.Qd8 Kh7 41.Qe7 Kh6 42.Qf6 Kh7 43.Qe7 Kh8 44.Qf6 Kg8 45.Qd8 Kf7 46.Qd7 Kf8 47.Qd8 Kf7=) 37.Kg2 Qh2 38.Kf3 Qh1 (38...Qb2?! 39.Qd7 Kf6 40.Qe6 Kg7 41.Qe7 Kg8 42.Qd8 Kh7 43.Qe7 Kh6 44.Qh4 Kg7 45.Qe7 Kh8 46.Qf6 Kg8 47.Qd8 Kf7 48.Qd7 Kf8 49.Qd8 Kf7=) 39.Kg4 Qd5 40.Qc7 Kf6 41.Qd8 Kg7–/+) 35...Kf6 36.Qh8 Kf5 37.Qf8 Kg5 38.Qg8 (better is 38.Qg7 Kh4 39.Qe7 Qg5 40.Qg5 Bg5 41.Bc3–+) 38...Kh4 39.Qd8 Qg5 40.Qd7 (40.Qg5 Bg5 41.Bc3 Be3–+) 40...Qh5 41.Qh3 Kg5 42.Qh5 Kh5 43.Kh3 Kg5 44.Bc3 (44.Kg2–+) 44...Kf5 45.Be1 (45.Ba5 b6 46.Be1 e4 47.de4 Ke4–+) 45...e4 46.d4 e3 47.Kg2 Ke4 0–1. DEFFM – GuestYJLP, freechess.org, 2016.

6.Nf3 Be7 7.Be2 h6 8.0–0 Nbd7 (8...e4 9.Nd4 Qd7 10.Ne6 Qe6 11.d4+=) 9.d4 e4 10.Nfd2 (10.d5 ef3 11.de6 fe2 12.ed7 Qd7 13.Qe2 a6=) 10...0–0 11.Nc3 (11.d5 Bf7+=) 11...c6 (11...d5 12.c5=) 12.a4 d5 13.Qb3 (13.bc6 bc6 14.Rb1 c5=) 13...Qc7= 14.h3 (14.f3 Bd6 15.f4 dc4 16.Bc4 Bc4 17.Qc4 Kh7=) 14...f4 15.ef4 (15.bc6 bc6 16.cd5 Rab8=) 15...Qf4+= 16.Bc1 Qh4 (16...Bd6 17.Nf3 Qf5 18.Nh4+=) 17.Nd1 (17.bc6 bc6 18.Rb1 Rab8+=) 17...Bd6 (17...dc4 18.Bc4 Nd5 19.Ne3–/+) 18.Ba3 (18.bc6 bc6 19.Qc2 Rac8+=) 18...c5 19.dc5 (19.Ne3!?+=) 19...Nc5–/+ (19...Bc5 20.cd5 Nd5 21.Bg4+=) 20.Qe3 b6 (20...Rac8 21.a5–/+) 21.f4 (21.Rc1 Qf4 22.Qf4 Bf4 23.cd5 Bd2+=) 21...d4 (21...Rad8 22.a5–/+) 22.Qd4 Bf4 23.Bc5 bc5 24.Qc3 Bg3 (24...Qg5 25.Nb3–/+) 25.Nf2 (25.Ne3!?–/+) 25...Nd5!–+ 26.cd5 Bf2 (worse is 26...Rf2 27.de6 Re2 28.Rad1=) 27.Rf2? (better is 27.Kh2 Bd5 28.Bc4–+) 27...Qf2–+ (27...Rf2 28.g3 Qf6 29.Qf6 Rf6 30.de6+– (30.Ne4?! Bd5 31.Nf6 gf6=)) 28.Kh1 Bh3! (worse is 28...Qe2 29.de6 Rae8 30.Nb3 Re6 31.Nc5–+) 29.Qh3 (29.gh3 Qe2) 29...Qe2 Eliminates the defender e2 30.Qe6 Kh8 31.Nb3 Qb2 (31...Qh5 32.Kg1 Rfe8 33.Qd7–+) 32.d6 Rae8 33.Qd5 Re5 34.Qc4 (34.Qd1–+) 34...Rh5 0–1. Fischer,G – Jurasik,Joerg, Dortmund–ch, 1994.

6.Nf3 h6 7.Be2 Be7 8.0–0 0–0 9.d3 Nbd7 10.Nbd2 Qe8 11.a4 Nh7 (11...Qg6 12.Nh4 Qh7 13.d4=) 12.Qc2 (12.d4 e4 13.Ne1 Qg6+=) 12...Ng5 (12...Qg6 13.d4 e4 14.Ne1=) 13.Ng5+= Bg5 14.Nf3 (14.d4 c6+=) 14...Bf6 15.a5 (15.d4 Qg6+=) 15...Nc5 (15...a6 16.d4=) 16.Kh1 (16.d4 ed4 17.ed4 Ne4+/–) 16...f4 (16...e4 17.Nd4 Bd7 18.Rfd1=) 17.ef4 (17.d4 ed4 18.ed4 Nd7+/–) 17...ef4 (17...e4 18.Nd4 Bd4 19.Bd4 ed3 20.Bd3 Nd3 21.Qd3 Rf4 22.Rfe1+=) 18.Nd4 (18.d4!? Nd7 19.Rfe1+/–) 18...Bd7 19.Rfe1 (19.Bf3 a6 20.Bd5 Kh8 21.Nb3 Bb2 22.Qb2 Nb3 23.Qb3+=) 19...Be5 (better is 19...Qg6!?=) 20.Bf3+/– Nd3?? (better is 20...Qg6 21.a6 ba6 22.Ba8 Ra8=) 21.Be4 (21.Qd3 Rb8+–) 21...Nf2?? (better is 21...Ne1 22.Re1 Qc8–/+) 22.Qf2+– Kh8 (22...Rd8+–) 23.Bf5 (better is 23.a6 b6 24.Ba8 Qa8 25.Nf3 Bb2 26.Qb2+–) 23...Qg6?? (better is 23...Bf5 24.Nf3 Bh7=) 24.Be6 (better is 24.Bg6 a6 25.Be4+–) 24...Rg8?? (better is 24...Be6 25.Ne6 Qe6 26.Be5 de5–/+) 25.b6 (better is 25.Bd7 a6 26.Be6+–) 25...Qg3 1–0. DEFFM – stjurs, freechess.org, 2016.

5.d4 Nbd7

6.Be2 e4 7.d5 Nc5 8.Nh3 Na4 9.Bc3 Nc3 =.

6.de5 de5 7.Bc4 Bd6 8.Nf3 h6 (8...Qe7 9.0–0= (9.Nc3 Nb6 10.Bb3 Be6 11.Qe2 0–0 12.0–0) 9...Nb6 10.Bb3 e4 11.Bf6 Qf6 12.Nd4; 8...Nb6 9.Bb3 (9.Nbd2 Qe7 10.Bb3 a6 11.ba6 Ra6 12.Nc4) 9...Qe7 10.Ng5 Rf8 11.Nc3 h6 12.Nf3) 9.Nh4 (9.0–0 e4 10.Nd4 Ne5 11.Bb3 Qe7 12.a4; 9.Nbd2 Qe7 10.0–0 e4 11.Nd4 Nb6 12.a4) 9...Nf8 (9...Nb6 10.Bb3 Bb4 11.Nd2 f4 12.c3) 10.Qd3 (10.0–0 Qe7= (10...Ng4 11.g3 g5 12.Ng2) 11.Nc3 g5 12.Nf3) 10...e4+= 11.Qb3 Qe7 12.g3 (12.Bd4 Ng4 13.g3 Ne5+=) 12...g5–/+ 13.Ng2 Ng6 (13...Be6 14.Bd4–/+) 14.Nd2 (14.h4 Bd7+=) 14...Ne5 15.0–0–0 Rf8 16.h4 Nfg4 17.Rdf1 (17.Be5 Qe5 18.Rdf1 Qa1 19.Qb1 Qb1 20.Kb1 a6+=) 17...Bd7 (17...Nc4 18.Nc4 Bc5 19.f3 ef3 20.Rf3–+) 18.hg5 hg5 19.Be2 0–0–0 20.Qa4 (20.Nc4 Nc4 21.Bc4 Kb8–/+) 20...Kb8 (20...a6 21.Bd4–/+) 21.Nc4 Nc4 22.Bc4 Ne5 23.Bd4 Bc5 (23...a6 24.Be2–/+) 24.Qb3 (better is 24.Be2–/+) 24...Bd4 25.ed4 Nc4 26.Qc4 Be6?? (better is 26...Qa3 27.Kb1 Be6 28.Qe6 Rd4–+) 27.Qa4–/+ Qf7 28.Kb2 (28.Rd1 Rh8–/+) 28...Bc4 29.c3? (better is 29.Rd1–/+) 29...Bf1–+ 30.Rf1 Qh5 31.Qc2 (31.Qd1 Qh3 32.Ne3 f4 33.gf4 gf4–+) 31...Rfe8 (31...f4!? 32.b6 fg3 33.ba7 Ka7 34.Ne3–+) 32.Ne3 f4 33.gf4? (33.Nc4–+) 33...gf4 34.Nc4 Qb5 35.Qb3 Qb3 (35...Qd5!? 36.Na3–+) 36.ab3 (36.Kb3 c5! 37.dc5 e3 38.fe3 fe3–+) 36...b5 (36...Rg8 37.Re1 Rg2 38.Re4 Rf2 39.Ka3–+) 37.Ne5 Re5! 38.de5 Re8 0–1. Parker,Derek – Faber,Karl Heinz (2010), Box Hill Autumn Cup, 2000.

6.de5 de5 7.Qf3 g6 8.Nc3 e4 9.Qe2 Nb6 =.

6.de5 de5 7.Nf3 Bd6 8.Nbd2 (8.Bc4 Nb6 9.Bb3 Qe7=) 8...Qe7 (8...e4 9.Nd4 Nc5=) 9.Nc4 (9.a4 e4=) 9...0–0 (9...Bb4 10.c3 Bc5 11.Qc2+=) 10.Nd6 cd6 11.Bc4 Kh8 12.Ba3 Nc5 13.Bc5 (13.0–0 Bd7=) 13...dc5+= 14.0–0 e4 15.Ne1 (15.Nd2 Qe5+=) 15...Be6 16.Qe2 Ng4 17.g3 (17.Rd1 Qc7 18.g3 Bc4 19.Qc4 a6+=) 17...Bc4 18.Qc4 Qf6 (18...Rad8 19.h3 Nf6 20.Ng2–/+) 19.Ng2 (19.Rd1 Qh6 20.h4 Rac8+=) 19...Qh6 20.h4 (20.Nh4 g5 21.h3 Ne5 (21...gh4?! 22.hg4 hg3 23.Qc3 Qf6 24.Qf6 Rf6 25.fg3–/+) 22.Qc5 Rfe8–+) 20...b6 (20...Qb6 21.Nf4–/+) 21.Qc3 Qf6 (21...a6 22.a4+=) 22.Qf6= Nf6 23.Rfd1 Rfd8 (23...a6 24.a4+=) 24.Nf4= Kg8 (24...a6 25.a4=) 25.Kf1 (25.Ne6 Rdc8=) 25...Kf7+= 26.a4 a6 (26...g6!?=) 27.Rd8+= Rd8 28.a5 (worse is 28.ba6 Ra8+=) 28...ab5 29.a6 (29.ab6!? b4 30.Ra7 Nd7 31.Rc7+=) 29...Ra8+= 30.a7 g6 (30...Ke7 31.Ke2+=) 31.Ke2 (31.Ra6 Ke7=) 31...h6 32.Ra6 g5 33.hg5 hg5 34.Nh3 Nd5 (34...Nh7!?=) 35.Ng5+= Ke7 36.f4 (36.f3 ef3 37.Nf3 Kd6+=) 36...ef3 (36...b4 37.g4 Nc3 38.Kf2 fg4 39.Kg3=) 37.Nf3+= Nc7 (37...Kd6!?+=) 38.Rb6+/– Ra7 39.Nh4 Nd5 40.Nf5 Kf8 41.Rb8 Kf7 42.Nd6 (42.Kf3 Nc3+/–) 42...Kg6 (42...Ke6 43.Nb5 Ra2 44.Kd2+–) 43.Nb5 (43.e4 Nc3 44.Kd3 Ra3+–) 43...Ra2 (43...Re7 44.Kd3+/–) 44.Kd2 Nb4 45.Nd4! cd4 46.Rb4 de3 47.Ke3 (better is 47.Kd3+–) 47...Rc2+/– 48.Rb5 Rc3 49.Kf4 Rc4 50.Kf3 Rc3 51.Kg4 Rc4 52.Kh3 Rc3 (52...Rd4 53.g4+/–) 53.Kh4 Rc6 54.g4 Rd6 55.Rb4 Rc6 56.g5 Rd6 ½–½. Baars – Weyerstrass, LeerdamI–LarenI, 1975.

6.Nh3 c6 7.Nd2 Qa5 8.c4 Ne4 9.f3 Nd2 =.

5.Nf3 Be6

6.Nc3 Be7 7.d4 e4 8.d5 Bd7 =.

6.Nc3 Be7 7.d4 e4 8.Ng5 Bg8 9.d5 Nbd7 10.Bc4 Ne5 11.Bb3 h6 12.Ne6 Be6 13.de6 c6 14.a4 Nfg4 15.h3 Nf6 16.Ne2 0–0 17.0–0 Qe8 18.Nd4 Qg6 19.Ne2 Nh5 (better is 19...Qg5!?=) 20.Be5+/– de5 21.Qd7 Rfe8 (21...Rae8 22.Qb7 f4 23.Nc3+/– (23.Qc6 f3 24.Ng3 fg2 25.Kg2 Rf3–/+)) 22.Qb7+/– f4 23.f3 (23.bc6 f3 24.Ng3 Ng3 25.fg3 Qg3–/+) 23...cb5 24.ab5 ef3 25.Rf3 Bc5 26.Qf7 Kh7 27.Bd5 Rad8 28.Qg6 Kg6 29.Be4 (29.c4 Nf6 30.Kf1 Nd5 31.cd5 fe3 32.Rg3 Kh7+=) 29...Kg5= 30.g4 (30.Kh2!? Be3 31.h4 Kg4 32.Ra4+=) 30...Nf6–/+ 31.Bf5 Be3 32.Re3+= fe3 33.Ra7 g6 34.h4? Kh4–+ 35.Bg6 Re6 36.Ra4 Kh3 37.Nc3 Nd5 38.Bf5?? Rb6 39.g5 Kg3 40.Ne2 1–0. Querol Soro,Sergio (1995) – Guetas Sanchez,Hugo (1940), Aragon–chT, 2004.

6.c4 a6 7.d4 A) 7...ab5 8.de5 de5 9.Qd8 (worse is 9.Ne5 Qd1 10.Kd1 Ne4–/+) 9...Kd8 10.cb5 Bb4 11.Nbd2=; B) 7...e4 8.Ng5 Bg8=.

6.c4 Nbd7 7.Be2 Be7 8.d4 e4 9.Ng5 Bf7 10.Nf7 Kf7 11.Qb3 Re8 12.Nc3 Kg8 13.a4 c5 14.bc6 bc6 15.c5 d5 16.Rb1 Rb8 17.Qc2 Qc7 18.0–0 Rf8 19.Ba3 Qa5 20.Bc1 Qc7 21.Bd2 g5 (better is 21...Ng4!? 22.g3 Ngf6=) 22.Rb8+/– Rb8 23.Rb1 f4 24.Rb8 Qb8 25.Qb1 (25.ef4 gf4 26.Qc1 Bd8+/–) 25...Qc7? (25...Qb1 26.Nb1 fe3 27.Be3=) 26.Ba6 (better is 26.ef4!? gf4 27.Qc1+/–) 26...Nb8+= 27.Qb7 ½–½. Fournier,Frederic – Pigeon,Herve, Coupe, 1997.

6.c4 h6 7.Nc3 (7.d4 e4 8.d5 Bd7+=) 7...Be7= 8.Be2 (8.d4 Nbd7=) 8...Nbd7 (8...0–0 9.0–0=) 9.d4+= e4 (9...0–0 10.0–0=) 10.Nd2 (10.Nh4 Nb6 11.d5 Bc8+/–) 10...Nf8 (10...0–0 11.d5 Bf7 12.Nb3+=) 11.d5+= Bf7 12.f3 (12.0–0 N8d7+=) 12...ef3 13.Nf3 Qd7 (13...Ng4 14.Qd2+=) 14.a4 (14.0–0 Ng4 15.Qd2 Bg6+=) 14...g5 (14...Ng4 15.Qd2+=) 15.a5 (15.0–0 Ng4+/–) 15...g4 (15...Ng4!? 16.Qd2 Bf6+/–) 16.Nd4+– Nh5 (16...Bg6 17.a6 ba6 18.Ra6+–) 17.a6 (17.0–0 Ng7+–) 17...b6 (17...ba6 18.Ra6 Bh4 19.g3+–) 18.g3 (better is 18.0–0!? Ng7 19.Nf5 Nf5 20.Bg4+–) 18...Bf6 19.Nc6 Ng7 20.Bd3 (20.0–0 h5+–) 20...h5 (20...Ng6 21.0–0 Ne5 22.e4 Nf3 23.Kh1+/–) 21.Qc2 (21.e4 Ng6 22.ef5 Ne5+–) 21...Ng6 (21...h4 22.Rf1 hg3 23.hg3+/–) 22.Rf1 (22.0–0 Ne7+–) 22...Ne7+/– 23.0–0–0 Nc6 24.bc6 Qe7 25.e4 fe4 26.Be4 (26.Ne4!? Be5 27.Nf6 Kd8 28.Rde1+–) 26...0–0–0+= 27.Rde1 Be5 28.Nb5 Kb8 29.Kb1 (29.c5 Ne8+/–) 29...Rhf8 30.Be5 (30.c5!? h4 31.cd6 Rd6 32.Nd6 Qd6 33.Be5 Qe5 34.Qb2+– (34.gh4?! Qd6+–)) 30...de5= 31.Rf2?? (better is 31.d6 Rd6 32.Nd6 cd6 33.Bd5+=) 31...Qb4–+ (31...Qb4 32.Ka2 Qe1–+) 0–1. Mueller,Ernst – Bannwart,Remo, Weihnachts op–B, 1999.

6.d4 e4 7.Ng5 Bg8 (7...Bc8 8.d5 Qe7 9.Bc4 Nbd7=) 8.c4 (8.Be2 a6 9.ba6 Na6=) 8...h6 (8...d5 9.c5 Ng4=) 9.Nh3 Bf7 (9...Be7=) 10.Nd2 Nbd7 11.Be2 Qe7 12.g4 (better is 12.0–0!?+=) 12...fg4+= 13.Bg4 Ng4 14.Qg4 Nf6 15.Qg2 d5 16.c5 g5 17.a4 Bh5 18.Ba3 Qe6 19.Qf1 Bg7 20.Ng1 c6 21.Ne2 0–0 22.h3 Rf7 23.0–0–0? (better is 23.Ng3!?+=) 23...Qd7 24.Re1 (24.h4 gh4 25.Rh4 cb5 26.ab5 Qb5–+) 24...cb5 25.Ng3 b4! 26.Bb4 Qa4 27.Bc3 Bg6 28.Kb2 b6 29.Ra1 Qc6 30.cb6 Qb6 (30...Qb6 31.Kc2 Rc8–+) 0–1. Lewandowski,Michal (1640) – Kadziela,Konrad (1955), DMP – II liga juniorow Poland, 2011.

4.Nc3 Nf6

5.Bc4 d5 6.Bb3 Bb4 7.a3 Ba5 8.Nf3 e4 9.Nd4 0–0 10.0–0 ½–½. wgcbranco – eduqueiroga, net–chess.com, 2006.

5.Nf3 Be7 6.a3 0–0 7.Bc4 d5 8.Ba2 e4 9.Nd4 a5 10.b5 c6 11.h3 Kh8 12.d3 a4 13.0–0 Bd6 14.bc6 bc6 (worse is 14...Nc6 15.Nd5 Nd5 16.Bd5 Nd4 17.Bd4+/–) 15.Nce2 Qe7 16.c4 Ba3 17.Ba3 Qa3 18.cd5 ed3 19.Nf4 Qc3 (19...Qd6 20.Bc4=) 20.Qf3 d2 (20...cd5!? 21.Rfc1 Qa5+=) 21.dc6+= Ra6 22.Nfe6 Be6 23.Ne6 Rc8 24.c7 Nbd7 25.Rab1 a3 (25...Ra5!?+=) 26.Qf5+/– Rb6 27.Rb6 Nb6 28.Qg5 Rc7 29.Nc7 Qd3 30.Ne6 (30.Ne6 Qf1 31.Kh2 Qg1 32.Kg1 d1Q 33.Kh2 Qd6 34.f4+–) 1–0. calbag – marekt, ChessWorld.net, 2013.

4.c4

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

4.c4 Be6 5.Nf3 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be6).

4.c4 Nf6

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

5.b5 (--> 4.b5 Nf6 5.c4).

5.Nc3 Be7 6.Nf3 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Nc3).

5.Be2 Be6 6.Nf3 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 Be6).

5.Be2 Be7 6.Nf3 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2).

5.Nf3 b6 6.Be2 Be7 7.0–0 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 0–0 7.0–0 b6).

5.Nf3 Be6 6.Be2 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 Be6).

5.Nf3 Be6 6.Be2 Be7 7.0–0 0–0 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 0–0 7.0–0 Be6).

5.Nf3 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7).

5.Nf3 Be7 6.d4 e4 7.Nfd2 c6 8.Nc3 Be6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be6 6.d4 e4 7.Nfd2 c6 8.Nc3 Be7).

5.Nf3 Be7 6.d4 e4 7.Nfd2 Be6 8.Nc3 c6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be6 6.d4 e4 7.Nfd2 c6 8.Nc3 Be7).

4.Bc4 Nf6

5.a3 a5 6.d4 ed4 7.Qd4 =+.

5.a3 Nc6 6.Nf3 e4 7.Nd4 d5 8.Be2 Be7 9.Nc6 bc6 10.c4 (10.0–0 a5=) 10...0–0 11.cd5 cd5 12.f4 Ng4 (12...Rb8 13.0–0+=) 13.g3 (13.0–0 c5=) 13...c5 14.h3 Nf6 15.bc5 Bc5 16.Qb3 (16.Nc3 Qe7+=) 16...Be6–/+ 17.Nc3 Rb8 18.Qa2 Qd7 19.Nd1 Rfc8 (19...Rbc8 20.Ba6 Rce8 21.Rc1–/+) 20.Rc1 (20.Bf6 gf6 21.d4 ed3 22.Bd3 Qc6+=) 20...Bf7 (20...Be7 21.Rc8 Rc8 22.Bd4–/+) 21.Qa1 Nh5 22.g4 Ng3 23.Rg1 Ne2 24.Ke2 Rb3 (24...g6 25.Bd4 Be7 26.Rc8 Qc8 27.Bh8 Qa6 28.Kf2+=) 25.Bg7 (25.gf5 g6 26.fg6 hg6+=) 25...Bg6 (25...Ra3 26.Qb2 Ra5 27.gf5 Bh5 28.Ke1 Rb5+–) 26.Bh6 d4 (26...Ba3?? 27.Rc8 Kf7 28.Qg7 Ke6 29.gf5 Bf5 30.Qe5 Kf7 31.Rg7) 27.gf5 (27.Qa2 Qb5 28.Ke1 Rb8 29.gf5 de3 30.de3 Qa5 31.Kf2 Qa3 32.Qa3 Ba3+– (32...Ra3?? 33.Rc5 Ra2 34.Ke1+–)) 27...Qf5 (27...de3 28.de3 Re3 29.Ne3 Qd3 30.Kf2 Qe3 31.Kg2 Qf3 32.Kh2 Bg1 33.Kg1 Qg3 34.Kf1 Qh3 35.Kg1 Qg3 36.Kh1 Rc1 37.Qc1 Qh3 38.Kg1 Bf5 39.Qc5 Qh6 40.Qf5 Qb6 41.Kg2 Qb2 42.Kf1 Qc1 43.Kg2 Qd2 44.Kg3 Qc3 45.Kh4 Qe1 46.Kg4 Qg1 47.Kh4 Qh2 48.Kg4 Qg2 49.Kh4 Qf2 50.Kh5 Qf3 51.Kh6=) 28.Qa2 (28.ed4 Ra3 29.Rc5 Qc5 30.dc5 Ra1 31.f5+/–) 28...Rcb8= 29.Rg5 (29.Ke1 Kh8= (worse is 29...Ba3 30.Rb1 Qf7 31.Rb3 Rb3 32.Qc2+/–)) 29...d3 (29...Qh3 30.Rcc5 d3 31.Kf2 Qf3 32.Kg1 Qd1 33.Kh2 Kh8=) 30.Ke1= Qh3 31.Rgc5 ½–½. Wessel,Volkmar – Krueger,Axel, Schleswig Holstein–ch, 1992.

5.a3 d5 6.Bb5 (6.Be2 Bd6 7.c4 dc4 8.Bc4 Qe7=) 6...Bd7= 7.Be2 Bd6 8.Nf3 Qe7=.

5.a3 Nbd7 6.Nf3 Nb6 7.Ba2 Na4 8.Bc1 Bd7 9.c4 (9.0–0 e4 10.Nd4 d5=) 9...e4 10.Nd4 g6 11.Qb3 (11.0–0 Bg7=) 11...Qe7 12.0–0 Bg7 13.Nc3 Nc3 14.dc3 c5 (14...0–0–0 15.c5+=) 15.bc5= dc5 16.Qb7 0–0 17.Ne2 (17.Nb5 Rfb8 18.Qa6 Rb6=) 17...Rfb8+= 18.Qc7 Ng4 19.Rd1 Be5 (better is 19...Qh4 20.Qg3 Qg3 21.Ng3 Bc3–/+) 20.Rd7?? (better is 20.Qd7 Rd8 21.Qa4+= (21.Qe7?? Rd1)) 20...Qh4–+ Threatening mate... how? (20...Bc7? 21.Re7 Bd6 22.Rd7 Bh2 23.Kf1+–) 21.Rg7 Bg7 22.Qg3 Rd8 (22...Qd8 23.Nd4 Be5 24.f4 ef3 25.Qf3 cd4 26.cd4 Bd4 27.Rb1 Rb1 28.c5 Kg7 29.Bb1 Bc5 30.Be4–+) 23.Bb3 (23.Qh4?? Rd1) 23...Qe7 (23...Qg3 24.Ng3 Rab8 25.Bc2–+) 24.f4 (24.h3 Rab8 25.hg4 Rb3 26.gf5 Be5–+) 24...Rab8 25.Bc2 Qe6 26.h3 Qc4 27.Qe1 Nf6 28.Bb1 Kh8 29.Kf2 (29.Ba2 Qd3 30.Kh2 Qc2–+) 29...Qa4 30.Qg1 (30.Bd2–+) 30...Rd1 31.Qh2 Rc1 (31...Rc1 32.Nc1 Rb2 33.Ne2 Qd1–+) 0–1. Diener,Rudolf – Zylla,Johannes, corr SOK–92–79, 1992.

5.a3 Be7 6.Nf3 d5 (6...a5 7.b5 c5 (7...e4 8.Nd4 d5 9.Be2 c5 10.bc6 bc6 11.Nc3=; 7...d5 8.Be2 e4 9.Ne5 Nbd7 10.Bh5 g6 11.Nd7=) 8.0–0 (8.Be2) 8...e4 9.Ng5 d5 10.Be2 0–0 11.f3=; 6...e4 7.Nd4 d5 8.Be2 0–0 9.0–0 a5 10.b5 c5 11.bc6=) 7.Bb3 (7.Bb5 c6 8.Be2 e4= 9.Ne5 0–0 10.0–0 Nbd7 11.f4=) 7...e4 8.Nd4 (8.Ne5 a5 9.ba5 Be6 10.Nc3 Ra5 11.Ne2=) 8...0–0 (8...a5 9.Nc3 0–0 10.b5 c5 11.bc6=) 9.0–0 (9.c4 Nc6 10.Nc6 bc6= 11.d3=) 9...Kh8 (9...a5 10.b5+= a4 11.Ba2=) 10.c4 (10.Nc3 a5 11.b5=) 10...c6 (10...a5 11.c5=) 11.cd5 cd5 (11...Nd5 12.d3=) 12.Nc3 (12.d3 Nc6=) 12...Nc6 13.Nce2 Ng4 (13...a5 14.b5 Nd4 15.Nd4=) 14.h3 Nf6 15.Nf4 Rg8 (15...Nd4 16.Bd4 a5 17.Rb1=) 16.Rc1+= g5?? (better is 16...a5 17.Nc6 bc6 18.Rc6 Bb7+=) 17.Nd5!+– Rg6 (17...Nd5 18.Nc6 (18.Nc2)) 18.Nc6 (better is 18.Rc6 bc6 19.Nc6+–) 18...bc6 19.Ne7 (worse is 19.Rc6 Bd7 20.Rc7 Kg7+–) 19...Qe7 20.Rc6 Bd7 21.Bf6 (21.Bf6 Rf6 22.Rc7+–) 1–0. Wessel,Volkmar – Gruen,Holger, Schleswig Holstein–ch cand, 1991.

5.Bb2 c6 6.0–0 Qe7 7.a3 g6 8.Re1 Be6 9.Be6 Qe6 10.d4 Nbd7 11.Nbd2 Bg7 12.c4 e4= 13.Ng5 Qe7 14.d5 h6 15.Ne6+/– Nf8 16.Ng7+– Qg7 17.Qa4 0–0–0? 18.Qa7 c5 19.bc5 dc5 20.Qc5 Kb8 21.Be5 (21.Be5 Rd6 22.Bd6 Qc7 23.Qc7 Ka8 24.Qa5) 1–0. pumpkin (2255) – clochard (2245), net–chess.com, 2003.

5.Bb3 a5 6.ba5 Nc6 7.f4 e4 8.a6 Ra6=.

5.Bb3 Nc6 6.a3 a5 7.b5 a4 8.Ba2 Ne7=.

5.Bb3 Nc6 6.a3 b5 7.c4 a6 8.cb5 ab5 9.Nc3 Ba6 10.Nf3 h6 (10...e4 11.Ng5 Ne5 12.0–0+=) 11.0–0 Ne7 12.Qe2 (12.Be6 g6+/–) 12...c6+= 13.Nh4 d5 Black intends e4 14.Nf5?? (better is 14.Nf3 Qd6 15.d4+=) 14...Nf5–+ 15.Bc2 e4 (15...Bc8!? 16.f4 e4 17.d3–+) 16.f3 Qe7 (better is 16...ef3 17.Rf3 Ne7–/+) 17.fe4= Nd6 18.ed5 Nc4 19.Bg6 Kd8 20.Bc1 (better is 20.dc6!? Nb2 21.Rf6 gf6 22.c7 Qc7 23.Qf3+=) 20...cd5–/+ 21.d3 Ne5 22.Bf5 g6 23.Bh3 Bg7 24.Rf6? (24.Bb2!?–/+) 24...Bf6 (better is 24...Qf6!? 25.Bb2–+) 25.Nd5 Qd6 26.Nf6 Qf6 27.Bb2 Re8 28.Bd4 (better is 28.Rf1 Qb6 29.Qf2–/+) 28...Ra7?? (better is 28...Bc8 29.Rf1 Qc6 30.Bc8 Rc8–+ (30...Qc8?! 31.Be5 Re5 32.Qb2=)) 29.Rf1 (better is 29.Ba7 Nf3 30.Qf3 Qa1 31.Kf2 Qb2 32.Kg3 Qe5 33.Qf4 Qf4 34.Kf4 g5 35.Kf3+–) 29...Qg5?? (better is 29...Qg7 30.Qa2 Rd7 31.Bd7 Qd7 32.Be5 Re5 33.Qg8 Re8 34.Qg6 Qe6 35.Qf6 Qf6 36.Rf6 Bc8+/–) 30.Ba7+– Bb7 (30...Bc8 31.Qa2 Bh3 32.Qd5 Kc7 33.Rc1 Nc4 34.Qg5 hg5 35.dc4+–) 31.Bb6 Ke7 32.Bc5 (better is 32.Qa2!? Nf3 33.Rf3 Bf3 34.Qe6 Kf8 35.Bc5 Re7 36.Be7 Qe7 37.Qe7 Ke7 38.gf3 Kd8+–) 32...Kd8 33.e4 (better is 33.Qc2!? Nd7 34.Bd7 Bg2+–) 33...Nd7 (33...Nd7 34.Bd7 Kd7 35.Rf7 Ke6 36.Rb7 Qc1 37.Kf2 Qf4 38.Qf3 Qf3 39.Kf3 Ra8 40.Re7 Kf6 41.e5 Kg5 42.Be3 Kh5 43.g4 Kh4 44.Bh6 Rh8+–) 0–1. GuestRBHB – GuestFTLL, freechess.org, 2017.

5.Bb3 Nbd7 6.Nf3 c5 7.Ng5 d5 (7...Qc7 8.Qf3=) 8.Ne6+= Qe7?? (better is 8...Qb6 9.Nf8 Rf8 10.bc5 Qe6+/–) 9.Nc7+– (9.Nc7 Kf7 10.Na8+–) 1–0. Deus Filho,Joaquim De (1995) – Do Valle Cardoso,Lucas, 1st IRT MEMORIAL MI HELDER CAMARA, 2016.

5.Bb3 Be7 6.Nf3 c6 7.0–0 Qc7 8.d3 Bd7 9.c4 0–0 10.Nbd2 h6 (10...e4 11.Ne1=) 11.Rc1 e4 (11...Be6 12.c5 Bd5 13.e4 fe4 14.de4 Bb3 15.Qb3 (15.ab3?! Nbd7=) 15...Kh7 16.Nc4+/–) 12.de4 fe4 (12...Ne4 13.Ne4 fe4 14.Nd2+/–) 13.c5 (13.Bf6 Rf6 14.Ne4 Rf7+/–) 13...d5 14.Be5 (14.Bf6 Rf6 15.Ne4 Rf8+/–) 14...Qc8 (better is 14...Qd8!? 15.Bf6 ef3 16.Be7 Qe7 17.Nf3 Bg4=) 15.Bf6+/– Bf6 16.Ne4 Bg4 17.Nf6 (17.Nd6!? Qc7 18.Bd5 cd5 19.Qd5 Kh8 20.Qb7 Qb7 21.Nb7+–) 17...Rf6 18.Bd5 (better is 18.e4!? Bf3 19.gf3+/–) 18...cd5+= 19.Qd5 Kh8 20.Ne5 Be6 21.Qd3 Nc6 (worse is 21...Ba2 22.Ng6 Rg6 23.Qg6+/–) 22.Ng6 Kg8 23.Nf4 (23.a3 Qe8 24.Nf4 Rd8=) 23...Ba2 (23...Nb4 24.Qe4 Nc6 25.a3–/+) 24.Qa3 Bf7 25.Rfd1 g5 (25...b5 26.Qd3–/+) 26.Nd5 Bd5 27.Rd5 Ne7 (27...Qg4 28.Qb3 Qe6 29.Rcd1–/+) 28.Rd2+= Qf8 (28...Qe6 29.Rcd1+=) 29.Rcd1 (29.Rd7 Rb8=) 29...Nc6 30.Qa2 Kh8 (30...Qf7 31.Qf7 Rf7 32.b5+=) 31.Qb2 Re8 32.Rd6 (32.Rd7 b6=) 32...Kg7 (32...Ne5 33.R1d5 Rd6 34.cd6+/–) 33.Rd7 Re7 34.R7d6 (34.b5 Nb8 35.Rd8 Re8=) 34...a6 35.g3 (35.R1d5 Re4 36.Rf5 Rb4+=) 35...Qf7 36.h3 Kg8?? (36...Ne5 37.Kg2–/+) 37.R6d2 (better is 37.Rf6 Qh5 38.Rdd6+–) 37...Kg7 38.Kg2 (38.Rd6 Ne5–/+) 38...Kg6 (38...Qh5 39.Rd7–/+) 39.Qb1 (39.Qc2 Kg7 40.Qb2 Qe6–/+) 39...Kg7 40.Qb2 Qe6 41.Rd6 Qe4 42.Kg1 Ref7 (42...Qe5 43.Qb3–/+) 43.R1d2 (better is 43.Rf6!? Rf6 44.Rd7 Kg6 45.Rb7+=) 43...Ne5–+ (43...Ne5 44.Rf6 Kf6 45.Rd6 Ke7–+; 43...Qb4?! 44.Rf6 Rf6 45.Rd7 Kg6 46.Qc2 Kh5 47.Qd1 Kg6 48.Qd3 Kh5 49.Qd1 Kg6 50.Qd3 Kh5 51.Qd1=; 43...Nb4 44.Rf6 Rf6 45.Rd6+/–) 0–1. GuestXJLS – GuestYKRD, freechess.org, 2017.

5.Bb5 c6 6.Be2 Be7=.

5.d3? c6 6.Nf3 h6 7.0–0 Qc7 8.Nc3 Nbd7 9.Re1 d5–/+ 10.Bb3 Bd6 11.b5 e4–/+ 12.Nd4 Bh2 13.Kh1 Nc5 14.Nf5?? Bf5–+ 15.bc6 bc6 16.g3 Bg3! 17.fg3 Qg3 18.Qe2 Ng4 19.Qg2 Qg2 20.Kg2 0–0 21.Rf1?? Bg6 22.Rf8 Rf8 23.Kg3 Ne3 24.Ne2 ed3 25.cd3 Nd3 26.Bd4 Nf5 27.Kg2 Nd4 28.Nd4 Nf4 29.Kg1 c5 30.Nc6 c4 31.Ba4 Be4 32.Ne7 Kh7 33.Re1 g5 34.Bc6 Rf7 35.Nc8 Rc7 36.Nd6 Rc6 37.Ne4 de4 38.Re4 c3 39.Re7 Kg6 40.Ra7 c2 41.Re7 c1Q 42.Kf2 Rc3 43.Rb7 Qd2 44.Kf1 Rc1# 0–1. TriAngel – Gadfly, ICC, 1999.

5.Be2 Be6 6.Nf3 Nd5 7.a3 Be7 8.0–0 0–0=.

5.Ne2 a5 6.b5? (better is 6.f4=) 6...d5–+ 7.Bb3 a4 8.Be5 (8.Ba4 Ra4 9.Be5 Nbd7–+) 8...ab3 9.cb3 (9.ab3 Ra1 10.Ba1 Bd6–+) 9...Bd6 10.Bb2 (10.Bd6 Qd6 (10...cd6?! 11.0–0+=) 11.0–0 0–0–+) 10...0–0 11.Nbc3 c5 (11...Be6 12.Nd4 Qd7 13.0–0–+) 12.Qc2 (12.bc6 Nc6 13.0–0 Qc7–+) 12...Be6 13.Na4 (13.d4 b6–+) 13...Nbd7 14.h4 (14.0–0 Qa5–+) 14...Rc8 (14...Re8 15.h5–+) 15.h5 Be5 (15...h6 16.Rc1–+) 16.Rc1 (16.Be5 Ne5 17.h6 g6–+) 16...Bb2 (16...Bd6 17.h6 g6 18.a3–+) 17.Qb2 Ng4 (17...Qa5 18.Nac3–+) 18.Nf4 Qf6 (better is 18...Qe7!?–+) 19.Qf6–/+ Rf6 (19...gf6?? 20.Ne6 Rfe8 21.Nec5+–) 20.d4 c4 21.bc4 dc4 22.Ke2 Bf7 23.f3 Nh6 24.Rh4 (24.Nc3 Rd6–/+) 24...Kf8 25.g4 fg4 26.fg4 Rd6 27.Nc3 Be6 (27...Re8!? 28.Kf3 Nf6–/+) 28.Kf3 (28.g5 Nf7 29.Rf1 Bf5=) 28...Nf7 29.Ne4 (29.e4 Re8 30.Rd1 Ng5 31.Ke3 Bf7+=) 29...Bd5–/+ 30.Nd5 Rd5 31.a4 Ng5 (31...Ke7!?–/+) 32.Ng5+= Rg5 33.e4 Nb6 (33...c3!?+=) 34.a5= Nd7 35.e5 Ne5 36.Kf4?? (better is 36.de5 Re5 37.Rb1+=) 36...Rg4! 37.Rg4 Nd3 38.Ke3 Nc1 39.a6 (39.Rf4 Kg8 40.h6 c3 41.hg7 Nb3–+) 39...ba6 40.ba6 c3 41.Rg1 (41.h6 g6 42.a7–+) 41...Nb3 0–1. Lauermann,Answarth – Johnen,Daniel (2170), Werther Schloss op, 1997.

5.Ne2 Nc6 6.a3 d5 7.Ba2 Bd6 8.0–0 e4 9.Ng3 h5 10.Bf6 Qf6 11.Nc3 h4 12.Nh5 (12.Nd5 Qb2 13.Ne2 a5+/–) 12...Qg5 (12...Qe5!? 13.g3 d4–/+) 13.Nf4= d4 14.Nb5 (14.Ncd5 h3 15.g3 Ne5=+) 14...Bf4–/+ 15.ef4 Qf4 16.g3? (better is 16.Bd5=+) 16...Qe5–+ 17.Qe2? (17.c4–+) 17...a6 18.f4 (18.Bd5 ab5 19.Qb5 Bd7–+) 18...Qe7 (18...Qb5 19.Rfe1–+) 19.Nc3 (19.Nc7 Qc7 20.g4 Ne7–+) 19...dc3 20.dc3 Bd7 (20...hg3 21.hg3 Be6 22.Be6 Qe6 23.Rad1–+) 21.b5 (21.g4 0–0–0–+) 21...Qc5 22.Kh1 (22.Qf2 Qf2 23.Kf2 hg3 24.Kg3 ab5 25.Rfd1–+) 22...hg3 23.bc6 (23.Qg2 Rh2 24.Qh2 gh2 25.bc6 Bc6 26.Kh2 Rd8–+) 23...Bc6 24.h4 (24.Rf3 Rh2 25.Qh2 gh2 26.Rff1–+) 24...0–0–0 (25.Kg2 Rh4–+; 24...Rh4 25.Kg2 Rh2 26.Kg3 Re2 27.Bc4 Qe3 28.Kh4 Rh2 29.Kg5 Rg2 30.Kh4 Qg3 31.Kh5 Rh2#) 0–1. Otte,Marco – Cornelisse,Johnny, Wag.Intrapid, 1997.

5.Ne2 Nbd7 6.a3 (6.Be6 Nb6 7.Bb3 a5 8.ba5 Ra5=) 6...c6 (6...d5 7.Bb3 (7.Bd3 e4 8.Nf4= Bd6=) 7...a5 8.f4 e4=) 7.f4 Nb6 (7...d5 8.Bb3 e4=) 8.Bb3 e4 9.Nbc3 d5 10.Nd4 (10.0–0 Be7=) 10...g6 (10...a5 11.b5 c5 12.Nde2+=) 11.Qe2 Bg7 12.a4 0–0 (better is 12...Qd6!?=) 13.a5+/– Nbd7 (13...Nc4 14.Bc4 dc4 15.Qc4 Nd5 16.a6+/–) 14.Ne6 Qe7 15.Nf8 Nf8 16.b5 Be6 (16...a6 17.Ba3 Qf7 18.b6+–) 17.bc6 (17.a6 Ng4+–) 17...bc6+/– 18.Ba3 Qc7 19.0–0 N8d7 20.Bb2 (20.a6 Rb8+/–) 20...Nc5 21.Ba2 Rb8 22.Rfb1 Nfd7 23.Nd1 Bb2 24.Rb2 (24.Nb2!? Rb5 25.a6+/–) 24...Rb2+= 25.Nb2 Qa5 26.Qe1 Qb6 27.Qb1 Qc7 (27...Qb4 28.Qc1+=) 28.d4 Nb7 (28...ed3!? 29.cd3 a5+/–) 29.c4+/– dc4 (29...Nf6!?+/–) 30.Bc4+– Bd5 31.Ra7 Qb8 32.Qa2 Kg7?? (better is 32...Nb6+–) 33.Qb3 (better is 33.Qa6 Kh6 34.Rb7+–) 33...Qa7–+ 34.Bd5 (34.Qb4 c5 35.dc5 Bc4 36.Qc3 Nf6 37.Nc4 Qc5–+) 34...cd5 35.Nd1 (35.Kf2 Nf6–+) 35...Qa5 36.Kf2 (36.Nc3 Nd6–+) 36...Qd2 37.Kg3 (37.Kf1 Na5 38.Qb1 Nc4–+) 37...Qe1 38.Nf2 (38.Kh3 Kh6 39.Nc3 Nf6 40.Qb7 Qc3–+) 38...Na5 39.Qd1 (39.Qa3 Kf7 40.Kh3 Qf2 41.Qa5 Qe3 42.g3 Qd4 43.Qc7–+) 39...Qd1 (39...Qe3 40.Qf3 ef3 41.gf3 Nc6–+) 40.Nd1 Nc4 41.Kf2 Ndb6 42.Nc3 Kf7 43.h3 (43.Ke2 Nb2–+) 43...h6 44.g4 (44.Ke2 Ke6–+) 44...Kf6 45.Ke2 (45.Nd1 g5–+) 45...g5 46.Kf2 Kg6 47.Nb5 (47.Nd1 gf4 48.ef4 fg4 49.hg4 h5–+) 47...h5 48.gh5 Kh5 49.fg5 Kg5 50.Nc3 (50.Na7 Na4 51.Nb5 Kh4–+) 50...Kh4 51.Ne2 Kh3 52.Nf4 (52.Nc3 Nb2–+) 52...Kg4 53.Ne6 (53.Ng6 Na4–+) 53...Nb2 (53...Na4 54.Nf8–+) 54.Nc7 (54.Ke2 Nd3 55.Nc5 Nc1 56.Kf2 Na2–+) 54...Nd3 55.Ke2 f4 56.ef4 Kf4 (better is 56...Nf4 57.Kf2–+) 57.Ne6 Kf5 (better is 57...Kg3 58.Ke3 Nc4 59.Ke2 Nc1 60.Kd1–+) 58.Nc7 (58.Ng7 Kg4 59.Ne6 Nc4–+) 58...Nf4 59.Kf2 (59.Ke1 e3 60.Nb5 Ke4 61.Nc3 Kd3–+) 59...Nc4 60.Nb5 (60.Na6–+) 60...e3 61.Ke1 Ke4 62.Kd1 Kf3 (62...e2 63.Kc2 e1Q 64.Nd6 Nd6 65.Kb3 Qb1 66.Ka4 Qb5 67.Ka3 Nc4 68.Ka2 Qb2) 63.Nc3 e2 (63...Nd2!? 64.Na2 e2 65.Kd2–+) 64.Ne2 Ne2 (64...Ne2 65.Ke1 Nd4–+) 0–1. Ackermann,Robert (1900) – Tobisch,Jasmin, Nuremberg Zabo op 2nd, 2000.

5.Nf3 c6 6.a3 d5 7.Bb3 e4 8.Nd4 Bd6 9.0–0 0–0 10.Nc3 a6 (10...Qc7 11.f4=) 11.f4 Ng4 (11...a5 12.b5=) 12.Qe2 Qh4 13.h3 Qg3?? (better is 13...Nf6=) 14.hg4+– fg4 (14...Kh8+–) 15.Ne4 Bf4 (15...Qh4 16.Nd6 g3+–) 16.Ng3 (16.Ng3 Bg3 17.Rf8 Kf8 18.e4+–) 1–0. Janek – dxao, internet, 2016.

5.Nf3 c6 6.a3= Nbd7 7.Ng5 (better is 7.Bb3=) 7...d5+/– 8.Ne6 Qe7 (8...Qb6 9.Nc3 Nc5 10.bc5 Qb2 11.Nc7 Kf7 12.Na8 dc4+–) 9.Nc7+– Kd8 10.Na8 dc4 11.Qf3 (11.d4 cd3 12.0–0 b6 13.Qd3 e4+=) 11...Qe6 (11...Qd6 12.Qf5 Qb8 13.0–0=) 12.b5 (12.d4 cd3 13.cd3 b6=) 12...e4 (12...cb5 13.d4+=) 13.Qd1 (13.Qg3 Bd6 14.Qg5 cb5+/–) 13...b6 14.Bf6 (better is 14.d4+=) 14...Qf6–/+ Black gets the initiative 15.c3 (15.Nc3!?–/+) 15...Nc5 16.0–0 Bb7 17.Nb6 ab6 18.a4 Nb3 (18...Qe6 19.Na3–+) 19.Ra2–/+ Bd6 (19...cb5 20.ab5 Qe5 21.Na3–/+) 20.Qe2 (20.f4 Qe6–/+) 20...Qe6 (20...Qe5 21.Qh5–+) 21.f3 (21.Na3 cb5 22.Nb5 Be5–/+) 21...c5 (21...cb5 22.fe4 fe4 23.ab5–+) 22.f4–/+ h6 23.Na3 Bd5 24.Nc2 g5 25.a5 (25.Ra3 Kc8–+) 25...Na5 26.Ra5? (better is 26.Qh5 Rg8 27.fg5 hg5 28.Qh3–+) 26...ba5 27.b6 Bb8 28.Rb1 gf4 29.ef4 Bf4 30.Qf2 Bd6 (30...Qd6 31.g3 Bg5 32.b7–+) 31.Rb5 (31.Ne3 Bb7 32.Nf5 Rf8–+) 31...Bb7 (31...a4 32.b7 Kd7 33.Ne3–+) 32.Ra5 Kd7 33.Na3 Ra8 (33...f4 34.Ra7 Rb8 35.Qf1–+) 34.Ra7 Kc6 35.Qf1 (35.Ra8 Ba8 36.Nc2 Kb6–+) 35...Kb6 36.Ra8 Ba8 37.Nc4 Kc7 38.d3 (38.g3–+) 38...ed3 39.Nd6 Qe3 40.Kh1 Kd6 0–1. Collins,G – Lassalle,M, Paris op, 1993.

5.Nf3 Nc6 6.a3= a5 (6...e4 7.Nd4=) 7.b5+= Ne7 8.Ba2 (8.0–0 Ng6+=) 8...Ned5 (8...c6 9.Ng5 Ned5 10.c4=) 9.c4 Nb6 10.c5 Nbd5 11.d3 a4 (11...Qd7 12.Qa4+=) 12.0–0 Bd7 (12...Qd7 13.cd6 cd6 14.Bc4+=) 13.e4 (13.Bc4 Be7+=) 13...Nf4 Black fights for the Initiative 14.Ng5 Ng4? (14...Qe7 15.b6 d5 16.bc7=) 15.Bf7 (15.Nf7 Qh4 16.h3 Nh3 17.gh3 Qh3 18.Qg4 Qg4 19.Kh2–+) 15...Ke7+= 16.ef5 (16.Bc4 Be8 (16...dc5?? 17.Nf7 Qe8 18.Nh8+–) 17.ef5 Bh5 18.cd6 cd6+/–) 16...Bf5= 17.d4 (better is 17.h3 h6 18.Bc4 Nf2 19.Rf2 hg5 20.Qf3 Bh3 21.Qb7=) 17...h6–/+ 18.h3 (18.cd6 cd6 19.Ne6 Ne6–+) 18...Nf6 (18...hg5 19.Bc4 Nf6 20.de5 de5 21.Be5–+) 19.de5 (19.cd6 cd6 20.Qf3 hg5 21.Qb7 Qd7 22.Qd7 Nd7–+) 19...hg5 20.ef6 (better is 20.Ba2 de5 21.Be5–+) 20...Kf7 21.fg7 Bg7 22.Bg7 Kg7 (22...Kg7 23.cd6 Qd6–+) 0–1. Forman,S – Voller,O, CR–chup12 Plzen, 1992.

5.Nf3 d5 6.Bb3 Bb4 7.Ne5= 0–0 8.Qf3 c6 9.0–0 Bd6 10.d3 Ng4 11.Bd5 cd5=+ 12.Qd5 Kh8 13.Nf7 Rf7 14.Qf7 Bh2 15.Kh1 Be5 16.d4?? Qh4 (16...Qh4 17.Kg1 Qh2) 0–1. lapinagile – petko (2325), net–chess.com, 2008.

5.Nf3 d5 6.Bb3 e4 7.Nd4 Bb4 8.c4 c6 9.Nc3 0–0 10.cd5 cd5 11.0–0 Nc6 12.Nde2 Be6 13.Nf4 Bf7 14.f3 Qd7 15.fe4 de4 (worse is 15...fe4 16.Nfd5 Nd5 17.Rf7 Rf7 18.Nd5+=) 16.Bf7 Qf7 (16...Kf7?! 17.Qb3 Ke8 18.Ne6=) 17.d4 Ne7 18.Nb5 Ned5 19.Qb3 Rfc8 20.Rac1 Nf4 21.Rc8 Rc8 22.Qf7 Kf7 23.Rf4 Ke6 (23...Kg6 24.Rf2 a6 25.Na3–+) 24.Rf2 Nd5 25.Re2 a6 26.Na3 b5 27.Nc2 Bc3 28.Bc1 g6 29.Kf2 a5 30.Bd2 b4 31.g3 a4 32.Bc3 (32.h3 Rb8–+) 32...Nc3 (32...bc3?! 33.Re1–+) 33.Nb4 Ne2 34.Ke2 Rc1 (34...Rc4 35.Na6 Rc2 36.Kd1 Ra2 37.h3–+) 35.Kd2 Rh1 36.d5 Kd6 0–1. Jaskulski,Klaus – Ziller,Christian, Berlin Unicorn op, 2003. (=1.Nf3 f5 2.b4 Nf6 3.Bb2 d6 4.e3 e5 5.Bc4)

5.Nf3 d5 6.Bb3 e4 7.Bf6 Qf6 8.Nd4 c6 9.c3 Nd7 (9...Bd6 10.Qh5–/+) 10.0–0 Ne5 11.f4 ef3 12.gf3 (12.Nf3 Nf3; 12.gf3 f4) 12...Bd6 (12...f4!?–/+) 13.f4+= Ng4 14.h3 Nh6 15.Rf2 Bd7 16.Rg2 Nf7 17.Qe2 g6 18.b5 (18.a3 a5 19.b5 a4+=) 18...Bc5 (18...c5 19.Nc2 c4 20.Ba4–/+) 19.bc6+= bc6 (worse is 19...Bc6 20.Nc6 Qc6 21.Qf3=) 20.Qa6 0–0 (better is 20...Bb6+=) 21.Bd5+= Bb6 22.Bf3 Rac8 23.Na3 Nd6 24.Nc4 c5 (24...Nc4 25.Qc4 Kh8 26.Rb1+/–) 25.Ne5 Be8 26.Ndc6 Ne4?? (better is 26...Rc7+/–) 27.Qc8+– 1–0. Wall,Bill – Shackspiel, Microsoft Gaming Zone, 2000.

5.Nf3 d5 6.Be2 e4 7.Ng5 Bd6 8.a3 0–0 9.f4 a5 10.b5+=.

5.Nf3 e4 6.Nd4 d5–/+ 7.Bb3 a6 (better is 7...Bb4!? 8.c4 c5–/+) 8.a3= Bd6 (8...c5 9.bc5 Bc5 10.0–0=) 9.0–0 0–0 10.c4 (10.f3 a5 11.Nb5 Be7=) 10...c6 (10...dc4 11.Bc4 Kh8 12.f3=) 11.Ne2 (11.f4 a5 12.cd5 cd5+=) 11...Be6 (11...dc4 12.Bc4 Kh8 13.Qc2+=) 12.d3 (12.c5 Bc7=) 12...dc4 13.Bc4 (13.dc4 Ng4 14.h3 Bh2 15.Kh1 Qd1 16.Bd1 Be5=) 13...Qe7 (13...Bc4 14.dc4 Ng4 15.Nf4 Bf4 16.ef4=) 14.Qb3= Bc4 15.Qc4 (15.dc4 c5=) 15...Kh8 16.Nd2 (16.de4 Ne4 17.Rd1 Nd7=) 16...ed3 (16...Nbd7 17.Qc2=) 17.Qd3 Ng4 (17...Ne4 18.Rad1 Rd8 19.Nd4+=) 18.Nf3+= a5 (18...Qc7 19.h3 Nh2 20.Nh2 Bh2 21.Kh1+=) 19.h3 (19.Rfd1 Be5 20.Ne5 Ne5+/–) 19...Ne5 (19...Nf6 20.Qf5 ab4 21.ab4 Ra1 22.Ra1 Bb4 23.Ng5+=) 20.Ned4?? (better is 20.Ne5 Be5 21.Be5 Qe5 22.Nd4+=) 20...Nd3–+ (20...Nd3 21.Rab1 ab4 22.ab4 Bb4–+) 0–1. Tuchtenhagen,Harald – Gnirk,Hajo, corr SOK–88–19, 1988.

5.Nf3 e4 6.Bf6 Qf6 7.Nd4 c5 8.bc5 dc5 9.Nb3 Bd6 10.d3 Nc6 11.N1d2 a6 12.de4 b5 (better is 12...Qg6!? 13.Bf1 fe4 14.Ne4 Be5 15.Nec5 Bc3 16.Nd2 Ba1 17.Qa1 A) worse is 17...Qc2 18.Qg7 Rf8 19.Nce4 (19.Nb7? Qc1 20.Ke2 Bb7–+) 19...Qc1 20.Ke2+/–; B) 17...0–0=) 13.Bd5+/– Bb7 14.ef5 Qf5? (better is 14...c4 15.Ne4 Bb4 16.c3 Bc3 17.Ke2 Ba1 18.Nf6 Bf6+/–) 15.Ne4+– 0–0–0? (15...Be7 16.Nbc5 Bc5 17.Nc5 Rd8+–) 16.Bc6 Be5 17.Bb7 Kb7 18.Nec5 Kc6 (18...Kb6 19.Nd3 Bc3 20.Nd2 Ba1 21.Qa1+–) 19.Nd4 Bd4 20.ed4 Rhe8 21.Kf1 Rf8 (21...Qd5 22.Nb3+–) 22.f3 g5 23.Kf2 h5 (23...g4 24.c3 gf3 25.gf3+– (25.Qf3?! Qd5 26.Na6 Rf3 27.gf3 Qc4+/–; 25.Na6?? fg2 26.Ke3 Qf2 27.Kd3 Rde8–+)) 24.a4 g4 (24...Qc5 25.dc5 Rd1 26.ab5 Kc5 27.Rhd1 ab5 28.Ra7+–) 25.ab5 ab5 26.Ne6! Qe6 (26...gf3 27.Qf3 (27.Nf8?! fg2 28.Ke3 Qh3 29.Qf3 Qf3 30.Kf3 gh1R 31.Rh1 Rf8 32.Ke3 h4+/–) 27...Kb6 28.Nf8 Qf8 29.Rhd1+–) 27.Ra6 Kd5 28.Re6 Ke6 29.Qe2 Kd7 (29...Kf7 30.Qb5 Rd4 31.Qf5 Kg8 32.Qg5 Kh7 33.Ke3+–) 30.Qb5 Ke7 (30...Kc7 31.Qc5 Kd7 32.Re1+–) 31.Qh5 Rf7 32.Re1 Kf8 33.Qh8 1–0. b4_player (2095) – RAGEINTHEBOX (1990), GameColony.com, 2002.

5.Nf3 e4 6.Bf6 Qf6 7.Nd4 c6 8.a3 d5 9.Be2 a5 10.ba5 =+.

5.Nf3 e4 6.Bf6= Qf6 Black fights for the Initiative 7.Nd4 c6 8.c3 (8.a3 a5 9.ba5 d5–/+) 8...d5 9.Be2 Bd6 10.a4 (10.0–0 a5+=) 10...a5 11.ba5 0–0 Black plans f4 12.Nb3 (better is 12.0–0!?–/+) 12...f4–+ 13.f3 fe3 (13...Qh4 14.Kf1–+) 14.de3 ef3 (14...Qg5 15.Kf2–+) 15.gf3 Bh3 16.f4 (16.Kd2 Bg2 17.Re1 Bf3 18.Bf3 Qf3 19.Qf3 Rf3–+) 16...Nd7 (16...Bg2 17.Rg1 Qh4 18.Kd2 Qh2 19.Qe1–+) 17.Rg1 (17.a6 ba6 18.Nd4 Rae8–+) 17...Rae8 (17...Qh4 18.Kd2–+) 18.Rg3–/+ Qh4 19.Qd4 Threatening mate... how? 19...Nf6 (19...Rf7 20.c4 Bb4 21.Nc3–/+) 20.N1d2 Bf5 21.Nf3 Qh6 22.Ra2 (22.a6 ba6 23.Kd1 Ng4–+) 22...Re4 (22...Ng4 23.Nfd2–/+) 23.Qd2 (23.Qb6 Rfe8 24.Qb7 Re3–/+) 23...Re7 24.Nbd4 (24.Qc1 Bg6 25.Kd1 Rfe8–+) 24...Bd7 (24...Ne4 25.Nf5 Rf5 26.Qd3 Ng3 27.hg3–+) 25.Rg2 (25.Qd3!?–+) 25...Ng4 26.Nc2 (26.Ne5 Ne3! 27.Qe3 Be5–+) 26...Ne3! 27.Ne3 Theme: Interference (27.Qe3 Re3) 27...Bf4 28.Qd4 (28.Kd1 Be3 29.Qe1 Ra8–+) 28...Be3 29.Qb4 (29.Qd3 Qh5 30.Nd4 Qh3–+) 29...Rfe8 (29...Bc5 30.Rg7 Qg7 31.Qc5 Rf3–+) 30.Kd1 Bf5 31.Qh4 (31.Rb2 Be4 32.Rg3 Bc1–+) 31...Qd6 32.Nd4 (32.Qh5 Be4 33.Rg3 Qc5–+) 32...Be4 33.Bf3 (33.Qg3 Qh6 34.Rf2 Bf2 35.Qf2–+) 33...Bd4 (33...Bd4 34.Be4 Re4–+) 0–1. Buczko,J – Taskovits,Istvan (2315), Szekszard op, 1998.

5.Nf3 h6 6.d4 (better is 6.a3!?=) 6...e4+= 7.Nfd2 (7.Nh4 d5 8.Be2 Bb4 9.c3 Bd6 10.Bh5 Nh5 11.Qh5 Kd7 12.Nf5 Qe8 13.Qe8 Re8 14.Nd6 Kd6=) 7...d5–/+ 8.Bb3 Bb4 9.c4 c6 (9...0–0 10.a3 Be7 11.0–0–/+) 10.0–0 Be6 11.Ba3 Ba3 12.Na3 Nbd7 (12...0–0 13.Rb1–/+) 13.Rb1 (13.cd5 Bd5 14.Bd5 cd5+= (worse is 14...Nd5 15.Qh5 Ke7 16.Qf5+/–)) 13...g5 (13...Qe7 14.cd5 Nd5 15.Bd5 Bd5 16.Nac4–/+) 14.f3 (14.cd5 cd5 15.Ba4 Qe7+=) 14...Qc7 (14...Qe7 15.Nc2+=) 15.fe4 (15.cd5!? Bd5 16.Bd5 Nd5 17.fe4 Ne3 18.Qh5 Kd8 19.Rfe1+=) 15...Ng4–/+ Threatening mate... how? 16.g3 Ne3 (16...fe4?! 17.cd5 cd5 18.Bd5 Bd5 19.Qg4=) 17.Qh5 Bf7 18.Qf3 (better is 18.Qe2!? Nf1 19.ef5 Kd8 20.Rf1–+) 18...Nf1–+ 19.Rf1 0–0–0 (better is 19...f4!?–+) 20.cd5+= cd5 21.e5 (better is 21.Qf5!? Rhf8 22.Nb5+=) 21...Qa5–+ 22.Nab1 Be6 23.Qd3 (23.Nc3 Qb4 24.Qd3 Kb8–+) 23...Rdf8 (23...Rde8 24.Rc1 Kd8 25.Qc2–+) 24.Rc1 (24.Qc3 Qc3 25.Nc3 Nb6–+) 24...Kb8 (24...Kd8 25.Qc3 Qb6 26.Nf3–+) 25.Nc3 (25.Qc3 Qb6 26.Kg2 Rc8–+) 25...f4 26.Qg6?! (26.Ne2 Rf7–+) 26...Qa3 (26...Qb6 27.Kh1 Qd4 28.Qe6 Qd2 29.Rd1 Qc3 30.Qd7 Qf3 31.Kg1 fg3 32.Qd6 Ka8 33.Qc5–+) 27.Rd1 (27.Qc2 Qb4 28.Qd3 Nb6–+) 27...Bf5 28.Qd6 Qd6 29.ed6 fg3 (29...Rf6 30.gf4 gf4 31.Nd5 Rd6 32.Kf2–+) 30.hg3 Nb6 (30...h5 31.Nd5 h4 32.gh4 Rh4 33.Re1–+) 31.Re1 (31.Nd5 Nd5 32.Bd5 Rf6–+) 31...Rd8 32.Rf1 (32.Re5 Rhf8–+) 32...Bd3 (32...Be6 33.Nb5–+) 33.Rf6 Bc4 34.Bd1 (34.Kg2 Rc8 35.Bc4 dc4–+ (35...Rc4?! 36.Nc4 dc4 37.Kf3–/+)) 34...h5 (34...Rde8 35.Bf3 Re3 36.Nc4 dc4 37.Nd1–+) 35.Bf3 (35.Rg6 g4–+) 35...h4 36.g4 (36.Rf7 Rhf8 37.Rg7 Rde8 38.gh4 gh4–+) 36...h3 (36...Rhf8 37.Rg6 Rg8 38.Re6–+) 37.Nc4 (37.Kh2 Rc8 38.Re6 Rc6 39.Nc4 Rc4 (39...dc4?! 40.Bc6 bc6 41.Ne4=; 39...Nc4?! 40.Bd5 Rd6 41.Bc4 Rd4 42.Re4 Rd2 43.Re2 Re2 44.Ne2+=) 40.Nd5 Rc2 41.Kg3 Nd5 (worse is 41...Ra2 42.Nb6 ab6 43.d7–+) 42.Bd5 h2–+) 37...h2 (37...dc4 38.Kh2 Rhf8 39.Rf8 Rf8 40.Bh1–+) 38.Kh1 Nc4 (38...dc4 39.Rf7 Rd7 40.Rd7 Nd7 41.Ne4–+) 39.Bd5 (39.d7 Nb6 40.Rf7 Rh3–+) 39...Nd6 40.Rf2 (40.Ne2 Kc7–+) 40...Nb5 41.Nb5 Rd5 42.a4 a6 43.Nc3 Rd4 44.Rh2 Rh2 45.Kh2 Rg4 46.Kh3 (46.a5 Rc4 47.Nd5 Rc5–+) 46...Rc4 (46...Rc4 47.Nd5 Ra4–+) 0–1. Frech,Josef – Scheichl,Roland, Schwarzach op–C, 2003.

5.f4 Nc6 =.

5.Ne2 d5

6.Bb3 a5 7.ba5 Bd6 8.f4 e4 9.Bc3 =.

6.Bb3 Bd6 7.0–0 Nc6 8.a3 a6 9.f4 e4 10.Nbc3 Be6 11.Ng3 Qe7 12.Nce2 0–0 13.Nd4 Nd4 14.Bd4 Rac8 (14...a5 15.c3=+) 15.Qe2 c5 16.bc5 Bc5 17.Bc5 Rc5 18.a4 Rfc8 19.Rfc1 Rd8 20.d4 Rc3 21.Qd2 Rdc8 22.Ne2 R3c7 23.h3 (23.a5 Rc6=) 23...Qd6 24.Rab1 h6 25.c3 Qd7 26.Rc2 Qf7 27.Rbc1 g5 28.fg5 hg5 29.Qe1 Nh5 30.Qf2 b5 31.ab5 ab5 32.Ra2 Rf8 (32...f4 33.Ra5 b4 34.g4=+) 33.Rf1 (33.h4 gh4 34.Qh4 Qg6=) 33...Qf6 34.Ra6 Rg7?? 35.Bd5! Re7 36.Ng3 Ng7 37.Ne4! Qh6 38.Nc5 Rfe8 39.Ne6 Ne6 40.Qf5 Qh4 41.Be6 Re6 42.Re6 (42...Qf2 43.Rf2 Re6 44.Qe6 Kh7 45.Rf7 Kg8 46.Qe8) 1–0. ArmandoS – Unexpected, Live Game Caissa's Web, 2004.

6.Bb3 Bd6 7.b5 Be6 8.d3 (8.f4 Nbd7=) 8...Nbd7 9.Nd2 Qe7 10.0–0 0–0 (10...a6 11.a4+=) 11.f4 (11.d4 Rae8+=) 11...e4 (11...Ng4 12.Rf3+=) 12.Nd4 ed3 (12...Nc5 13.Qe2+=) 13.cd3= Nc5 14.Qe2 (14.Qf3 Bd7 (worse is 14...Nd3 15.Ne6 Nb2 16.Nf8+/–; 14...Nb3?! 15.N2b3 Bd7 16.Nc2=) 15.Bd5 Nd5 16.Qd5 Kh8=) 14...Nb3 15.N2b3 Bd7 16.h3 (16.Qf3 a6 17.a4 Rfe8=) 16...Rac8 (16...Rfe8 17.Rf3+=) 17.Rf3 (17.Qf3 a6 18.ba6 ba6+=) 17...h6 (17...c5 18.bc6 bc6 19.Nd2+=) 18.Bc3 (18.Rc1 c5 19.bc6 bc6+=) 18...Kh8 (18...a6 19.ba6 ba6 20.Qc2+=) 19.Re1 Qf7 (19...a6 20.ba6 ba6 21.Rb1+=) 20.Qf2 (20.Qc2 c5 21.bc6 bc6= (worse is 21...Bc6 22.Nf5 Ba3 23.Rg3+/–)) 20...Rg8 (20...a6 21.a4=) 21.Nd2 Rge8 22.Nf1 (22.Rb1 a6=) 22...Rg8 (22...c5 23.bc6 bc6 24.Rb1+=) 23.Kh1 (23.Rb1 a6=) 23...Kh7 24.Qh4 (24.Rb1 a6=) 24...Qh5 ½–½. Cerami,Giuseppe (1795) – Melograni,Francesco (1675), 4th Nicolo La Rosa op, 2006.

6.Bb3 Bd6 7.c4 c6 (7...Na6 8.a3 c5 9.f4 ef4 10.Nf4 cb4 A) worse is 11.Nd5 Nd5 12.Ba4 Kf7 13.cd5 Qh4 14.Kf1 Nc5–/+ (worse is 14...Bh2 15.Be5 f4 16.d4=); B) 11.cd5?! Bf4 12.ef4 0–0=; C) 11.0–0=) 8.c5= Bc7 9.0–0 0–0 10.d3 f4 (10...a5 11.a3=) 11.ef4 ef4 12.Nd2 Bg4 13.f3 Bf5 14.Ne4 Nbd7 (14...Nfd7 15.Qd2=) 15.Qd2 Nh5 16.Rad1 (16.Nd4 Kh8=) 16...Kh8= 17.Nf2 Qh4 (17...Qg5 18.Nd4 Rae8 19.Rfe1=) 18.Nh1 (18.Nd4!?+=) 18...Rae8 19.Rf2 (19.Nf2 Nhf6=) 19...Ne5 (19...Re3 20.Nc1–/+) 20.g4 Nf3! 21.Rf3 Qg4 22.Kf2 Be4! 23.Nd4 (23.de4 Qh4 (23...de4)) 23...Bf3 24.Nf3 Re3 25.Ng1 f3 26.Qe3 Qg2 27.Ke1 Bf4 (27...Bf4 28.Rd2 Be3 29.Rg2 fg2–+; 27...Qh1?! 28.Qf2+=) 0–1. Diener,Rudolf – Mayr,F, corr ICCF EU/M/GT/175 (year?).

6.Bb3 Bd6 7.f4 e4 8.b5 a6 9.Nbc3=.

6.Bb3 Nbd7 7.Ng3 g6 8.d3 Bb4–/+ 9.Nd2 Qe7 10.0–0 c6 11.Nf3 Bd6 12.c4 Kf8 13.cd5= cd5 14.Ne2 Kg7 15.Nc3 Nb6 16.a4 Be6 17.Nb5 Nbd7 18.Rc1 a6 19.Nd6 Qd6 20.Qd2 Rhc8 21.a5 h6 22.d4 e4 23.Ne5 b5 24.Bc3 Qc7 25.Bb4 Qb7 26.Bd6 Rc1 27.Rc1 Rc8 28.Rb1 Nb8 29.Qb2 Nc6=+ 30.Qa3 Nd7 31.Nc6 Qc6 32.Bg3 Kf7 33.Rd1 g5 34.Bd6= Nf6 35.Be5 ½–½. PeterRs – Nokarookoff, ChessWorld.net, 2006.

6.Bd3 =+.

4.d4 Nc6

5.b5 Nb4 6.de5 de5 7.Qd8 (7.a3 Qd1 8.Kd1 Nd5 9.Be5 Be6+/–) 7...Kd8 8.Na3 Bd6 (8...e4 9.c3 Nd3 10.Bd3 ed3 11.0–0–0+=) 9.0–0–0 (9.Nf3 Be6+/–) 9...Bd7 (9...Nf6 10.Be5 Ne4 11.Nh3+= (11.Bg7 Rg8–/+)) 10.Nc4+/– Na2 (10...Nf6!? 11.Ne5 Ne4 12.Nf7 Ke7 13.Rd6 cd6 14.Nh8 Nf2 15.Bg7 Nh1–/+) 11.Kb1+– 1–0. GuestDPNV – GuestBMGB, freechess.org, 2017.

5.b5 Nce7 6.de5 d5 7.Nf3 Nh6 8.Nc3 (8.Bd3 Be6+/–) 8...Be6 9.Be2 Qd7 10.Qd4 Rg8 (10...Nc8 11.Rd1 Nb6 12.a4+–) 11.Ng5+– 0–0–0?? (better is 11...Rh8+–) 12.Qa7 (12.Qa7 c5 13.Na4+–) 1–0. Janek – Tempoh, internet, 2017.

5.b5 Nce7 6.de5 de5 7.Qd8 Kd8 8.Nf3 e4 9.Ng5 Nh6 10.Nc3 Ke8 11.Bc4+– Ng4?? 12.Bf7 Kd8 13.Rd1 Bd7 14.Be6 Nf6 15.Bd7 Nd7 16.Nf7 Ke8 17.Nh8 (17...Nb6 18.Ba3+–) 1–0. Marre – betinna, zagraj.pl, 2003.

5.Bb5 Bd7 6.Ne2 (6.a3 Nf6=) 6...e4 (6...Nb4!? 7.Bd7 Qd7+=) 7.Bc6 (7.a3 d5=) 7...bc6 8.Nf4 (8.c4 Rb8 9.a3 a5=) 8...d5 (8...Nf6 9.c4=) 9.Qh5+= g6 10.Ng6 Nf6 11.Qh4 Rg8 (better is 11...Bb4!? 12.c3 Rg8 13.cb4 Rg6=) 12.Nf8+/– Kf8 13.0–0 (13.Rg1 Ke8+/–) 13...Qe8?? (better is 13...Qe7+/–) 14.Qf6+– (14.Qf6 Qf7 15.Qf7 Kf7 16.f3+–) 1–0. GuestSJSZ – GuestVTLB, freechess.org, 2016.

5.Bb5 Qg5 6.Nf3 Qg4+= (worse is 6...Qg2 7.Rg1 Qh3 8.d5+/–).

4.d4 ed4

5.ed4 d5 6.a3 (6.Qh5 g6 7.Qe2 Kf7 8.a3 a5 9.b5 Nf6=) 6...Be6 (6...Nf6 7.Bd3= (7.Nf3 a5 8.b5 Bd6 9.Bd3 0–0=) 7...a5 8.b5 Bd6 9.Nf3 0–0=; 6...Bd6 7.Nf3 Nf6 8.Bd3 a5 9.b5 0–0=; 6...a5 7.b5 Nf6 8.Nf3 Bd6 9.Bd3 0–0=) 7.Ne2 (7.Qh5 Kd7= 8.Nf3 Nf6 9.Qg5 Kc8=; 7.Nf3 a5 8.b5 Bd6 9.c4 Nf6=) 7...Nd7 (7...Bd6 8.c4 (8.Bc1= Nf6 9.Nf4 Bd7=) 8...c6 9.c5 Bc7=) 8.Nf4+= Bf7 9.Bb5 (9.Bd3 Qe7= (9...g5 10.Nh5 Qe7 11.Kf1 f4+=); 9.Qf3 Qe7=) 9...c6 (9...Bd6 10.Qf3=) 10.Ba4 (10.Qe2!? Qe7 11.Bd3=) 10...Bd6+= 11.Qe2 Ne7 12.Ne6 Be6 13.Qe6 Nb6 14.Nc3 (14.Bb3 Qd7 15.Qe3 0–0+=) 14...Qd7 15.Qe2 0–0 16.0–0 Rae8 17.Bb3 Ng6 18.Qh5 Nf4 19.Qf3 Rf6 (19...Qe7 20.Rad1+=) 20.b5 (better is 20.Rae1=) 20...Ng2?? (better is 20...Rg6 21.g3 Nh3 22.Kg2 Ng5 23.bc6 bc6–/+) 21.Kg2+/– (21.Qg2? Rg6 22.Qg6 hg6–+) 21...Rg6 22.Kh1 Rh6 (22...Bh2 23.bc6 (23.Kh2 Qd6 24.Qg3 Rg3 25.fg3 Re3–+) 23...bc6 24.Rae1+= (24.Kh2 Qd6 25.Qg3 Rg3 26.fg3 Re3–+)) 23.h3 Ree6 (23...Re4 24.Bc1 (worse is 24.Ne4 fe4 25.Qg2 Rg6–+) 24...f4 25.Kg2 (25.Ne4 Rh3 26.Kg2 Rf3 27.Kf3 Qh3 28.Ke2 f3 29.Ke1 Qe6 30.bc6 Qe4 31.Be3 bc6–+) 25...Rd4 26.Bb2+/–) 24.Rg1 Rh4 25.Bc1 f4 26.bc6 bc6 27.Rg4 Rg4 28.hg4 (28.Qg4 Re1 29.Kg2 Qf7+–) 28...Rg6 29.g5 (29.Bf4?! Rf6 30.Bd5 Nd5 31.Nd5 Rf7+=) 29...Rg5 30.Ne4 (30.Bf4? Bf4 31.Ne4 Rg4–+) 30...Rg6 (30...Rg4!? 31.Nd6 Rh4 32.Kg1 Qd6+/–) 31.Nd6+– (31.Bf4 Bf4 32.Re1 Rg4–+) 31...Qd6 32.Bf4 (32.Qf4 Qe6 33.Qe3 Rh6 34.Kg2 Qg4 35.Qg3 Qe4 36.f3 Qe2 37.Kg1 Rg6+=) 32...Qf6 33.Qe3 Qh4 34.Bh2 Kf7 (34...Rf6 35.Kg1+–) 35.Re1 (35.Re1 Qd8 36.Qf4 Rf6 37.Qh4+–) 1–0. Wall,Bill – Swaim,Lee, North Wilkesboro, NC, 1976.

5.ed4 Nf6 6.d5 a5 7.b5 Be7 8.Bd3 (8.Nf3 0–0 9.Bd3 Ne4 10.Nd4 Bf6=) 8...0–0 9.Ne2 (9.Nf3 Ne4 10.0–0 Nd7=) 9...Ng4 (9...Ne4 10.0–0= (10.Nd4 Bf6=) 10...Bf6=) 10.0–0+= Bf6 11.c3 Be5 (11...Re8 12.Ng3=) 12.h3 Qh4 13.Nd2 f4?? (better is 13...Bh2 14.Kh1 Be5+=) 14.Nf3+– (14.hg4 f3 15.Ng3 fg2 16.Kg2 Rf2 17.Kf2 Qg3 18.Ke2 Bg4 19.Nf3 Qg2 20.Ke3 Qb2+–) 14...Qh6 (14...Qh5 15.hg4 Bg4 16.Ne5 de5 17.d6 cd6 18.Bc4 Kh8 19.Qd6+–) 15.hg4 Bg4 16.Ne5 de5 17.f3 Bf5 18.Ba3 Rf6 (18...Qb6 19.Rf2 Bd3 20.Qd3+–) 19.d6! cd6 20.Bf5 Rf5 21.Qd5 (worse is 21.Bd6 Qe6+–; worse is 21.Qd6 Qd6 22.Bd6 Nd7+–) 21...Kh8 1–0. aspasio – alibasbas9, ICC, 1999.

5.Bd4 c5 6.Bb5 Bd7 7.Bd7 Qd7 8.Bc3 cb4 9.Bb4 Nf6 10.Ne2 Nc6 11.Ba3 Be7 12.0–0 d5 13.Be7 Ne7 14.Nbc3 0–0 15.Qd3 Rac8 16.Rfd1 Rfd8 17.Rab1 Ng6 18.Qd4 b6 19.Rb5 Increasing the pressure on the isolated pawn on d5 19...Ne7 20.f3 Nc6 21.Qf4 Qe6 22.Rb3 Na5 23.Nd4 Qe7 24.Nf5 Qf8 25.Ne2 Nb3 26.cb3 Rd7 27.Ned4 Qa3 28.e4 de4 29.fe4 Kh8 30.e5 Nd5 31.Qg5 h6 (31...Qa2? 32.e6 Rdc7 33.e7 Re7 34.Ne7 Ne7 35.Qe7+–) 32.Qd2 Qc5 33.Kh1 (33.Nd6 Nc3 34.Re1 Rf8=) 33...Nc7 (33...Nc3!? 34.Re1 Nb5 35.Ng7 Kg8+= (35...Rd4?? 36.Qh6 Kg8 37.Qg5+–)) 34.Nd6= Rf8 35.Qe1 Re7 36.Nf3 Ne6 37.Rc1 Qd5 38.Rd1 Qa8 39.Qe3 Qc6 40.Rc1 Qd5 41.h3 Kg8 42.Rc4 b5 43.Rb4 a6 44.Rg4 Ng5! 45.Rd4 (45.Ng5 Qe5 Double attack (45...Re5 Discovered attack; 45...Qe5 Deflection; 45...Qe5 Decoy)) 45...Rf3 46.gf3 (46.Rd5?? Re3 47.h4 Nf7–+) 46...Qf3 (46...Qe5?! 47.Qe5 Re5 48.f4 Re1 49.Kg2+=; worse is 46...Re5 47.Ne4 Qa8 48.Qd3=) 47.Qf3 Nf3 48.Rf4 Ne5 49.Re4 Nc6 50.Re7 Ne7 51.Kg2 ½–½. Ringsborg,Allan (2370) – Wicklund_Hansen,Gunnar (2045), corr ICCF EM/M/A081 ICCF Email, 1999.

5.Bd4 c5 6.bc5 dc5 7.Bb2 (7.Bc3 Qd1 8.Kd1 Be6 9.Ne2 Nc6 10.Nf4 Bf7 11.Bd3 Nge7 12.Nd2 0–0–0 13.Ke1 Rg8 14.g4=) 7...Qd1 8.Kd1 Nc6 (8...Be6 9.Nh3 Ne7 10.Nf4 Bf7 11.Kc1 Nbc6 12.Be2 0–0–0 13.Nh5 Rd6 14.Nd2=) 9.Bc4 (9.Nf3 Bd7 10.Nbd2 Rd8 11.Bc4 Nh6 12.Rb1 a6 13.Re1 Ng4 14.e4+=) 9...Nf6 (9...a6 10.a4 (10.Nh3= b5 11.Be2 Bb7 12.Nf4 Nh6 13.Bh5 Ke7 14.Kc1=) 10...b6 11.Nf3 Bb7 12.Kc1 Nh6 13.Re1 Na5 14.Nbd2=; 9...Ke7 10.Nd2 Be6 11.Be6 Ke6 12.Ngf3 Nf6 13.Ke2 Rd8 14.Rhd1=) 10.Bf6+= gf6 11.Nf3 (11.Nd2 Bd6 12.Rb1 f4 13.Ne4 Ke7 14.Nd6+=) 11...Bd7 (11...Ne5 12.Bd5 Nf3 13.Bf3 Bd6 14.Nd2+=) 12.Nc3 (12.Nbd2 0–0–0 13.Rb1 f4 14.e4=) 12...0–0–0 13.Ke2 (13.Kc1 Ne5 14.Bd5=) 13...f4 14.Rad1 (14.Rhd1=) 14...fe3 15.fe3 (worse is 15.Ke3 Re8 16.Kf4 h5 17.Rd7 Kd7 18.Rd1 Bd6 19.Kf5 Rh6–/+) 15...Re8 16.Kf2 h5 17.h3 f5 18.Nd5 Rh6 19.Nf4 Re4 20.Bf7 (20.Bd5 Re7+=) 20...h4 21.Rd2 Rd6 (21...Be8 22.Be8 Re8 23.Rhd1+=) 22.Bd5 Ra4 23.Nh4 Nb4 24.Nhg6 Nd5 25.Nf8 Nc3 26.Rd6 Ne4 27.Kf3 Nd6 28.Nd7 Kd7 29.h4 (29.Ra1 Ra3+=) 29...Ra2 30.h5 Ne4 (30...Rc2 31.Rd1 Rc4+–) 31.h6+/– Rc2 32.Nh3 Nf6 33.Ng5 a5 34.e4 (34.h7 Nh7 35.Rh7 Kc6+/–) 34...fe4 35.Ne4 Nh7 36.g4 Ke8 (36...Rb2 37.g5 Rb6 A) 38.Nc5 Kd6 39.Na4 Rb3 (39...Ng5? 40.Kg4 Rb5 41.Rh5+–) 40.Kf4 Nf8+–; B) 38.Kg4+/–) 37.Kf4 (37.Rb1!?+–) 37...b5+/– 38.Kf5 Kf7 39.g5 Rg2 40.Rb1 b4 41.Ra1 b3 42.Ra5 b2 43.Rb5 Nf8 44.Rb7 (44.Nc5?! Rf2 45.Ke5 Kg6 46.Rb6 Kh5+/–) 44...Ke8 45.Nd6 (45.Nc5!? Rf2 46.Ke5 Re2 47.Kf4 Rf2 48.Kg3 Re2+–) 45...Kd8 46.Nc4 Rf2 (46...Nh7 47.Nb2 Rg5 48.Kf4+–) 47.Ke5 (47.Ke5 Rc2 48.Nb2+–) 1–0. Buczinski,Henryk – Troia,Elio, corr Argentina–200 Anos Br.72, 2010.

5.Bd4 Nf6 6.Nf3 Nc6 7.Bc3 Be6 8.b5 Ne7 9.Ng5 Qd7 10.Bf6 gf6 11.Qh5 Ng6 12.Ne6 Qe6 13.Bd3 Qe5 14.c3 0–0–0?? (better is 14...Qd5 15.Qf5 Qf5 16.Bf5 a6+/–) 15.Bf5+– Kb8 16.Bg6 hg6 (16...d5 17.Qe5 fe5 18.Bf5+–) 17.Qh8 Qb5 (17...d5 18.a4+–) 18.Qf6 Re8 19.Qg6 Re5 (19...Bg7 20.Qg7 Qb2 21.Qf7+–) 20.Nd2 Qd3 (20...Qd7+–) 21.Qd3 (21.Qd3 a6 22.f4+–) 1–0. Marre – tzmz49, 2003.

5.Qh5 g6 6.Qe2 (6.Qd1 A) 6...c5 7.bc5 (7.b5 Ne7 8.ed4 Bg7 9.Nf3 0–0 10.Be2=) 7...dc5 8.ed4 Bg7 9.Nf3 Nc6 10.c3=; B) 6...Bg7 7.Nf3 c5 8.bc5 dc5 9.ed4 Nc6 10.c3=; C) 6...Nf6 7.Bd4 (7.ed4 d5 8.a3 a5 9.b5 Bg7 10.Nf3=) 7...Bg7 8.c3 c5 9.Bf6 Bf6 10.a3=) 6...Bg7 (6...Nf6 7.ed4 Be7 8.d5 0–0 9.Qf3 Ne4 10.Nc3+=; 6...d5 7.ed4 (7.a3) 7...Kf7 8.a3 Kg7 9.Nf3 a5 10.b5=) 7.ed4 (7.Nf3 Nf6 8.Nd4 0–0 9.Nc3 f4 10.e4=) 7...Qe7 (7...Ne7 8.Nf3 (8.Nh3+= d5 9.Qf3 a5 10.b5=) 8...0–0 9.Qd2 a5 10.ba5=) 8.Nf3 c5 (8...Nc6 9.a3= Be6 10.b5=) 9.b5 (9.bc5 dc5 10.Nc3 Nc6+=) 9...Nd7 (9...Be6 10.c4 f4 11.Nbd2=) 10.Nbd2 (10.Nc3+=) 10...Nb6 11.Qe7 (11.Rb1 Na4 12.Ba1 Be6+=) 11...Ne7= 12.Nc4 Nc4 13.Bc4 d5 14.Be2 0–0 15.0–0 f4 16.c4 (16.Ba3 b6=) 16...Be6 (16...Re8 17.Rfe1 Bg4 18.cd5 Nd5 19.Rad1=) 17.Ng5 Bf5 18.cd5 Nd5 19.Bc4 (19.Rad1 Rac8 20.dc5 Bb2 21.Rd5=) 19...Rad8 (better is 19...Rfd8!? 20.dc5 Rac8+=) 20.Rad1+/– h6 21.Nf3 (21.dc5!? Bb2 22.Rd5 Rd5 23.Bd5 Kg7 24.Nf3+/–) 21...Be6 22.Ba3 Nc7 (22...Bf7 23.Bc5 (worse is 23.dc5 Nc3 24.Bf7 Kf7+=) 23...Nc3 24.Bf8 (24.Ba7?? Bc4 25.Rd2 Bf1 26.Kf1 Rd5–+) 24...Bc4 25.Bg7 Kg7 26.Rde1+=) 23.Be6+/– Ne6 24.dc5 Rd1 25.Rd1 Rf5 26.Rc1 (26.c6 bc6 27.Rd6 Nc7 28.bc6 Ra5 29.Rd8 Kh7+/–) 26...Bf8 27.Nh4 (27.c6 Ba3 28.cb7 Bd6 29.Rc8 Kf7+/–) 27...Rg5+= 28.c6 (28.Kf1 Kf7+=) 28...Ba3 29.cb7 Bc1?? (better is 29...Bd6 30.b8Q Bb8 31.Rc8 Kf7 32.Rb8 Nd4+=) 30.b8Q+– Kf7 (30...Nf8 31.Qa7 Bb2 32.Qc7+–) 31.Qa7 Kf6 32.b6 Rd5 (32...Rb5 33.Qh7 Rb6 34.Qg6 Ke5 35.Qh5 Kf6 36.Qh6 Ke7 37.Nf5 Kf7 38.g4+–) 33.h3 1–0. Krumpholz,Wolfgang – Kadur,Wolfgang, corr DDR–ch M594, 1976.

4.d4 d5

5.a3 a5 6.de5 ab4 7.Nf3 =.

5.a3 ed4 6.ed4 Bd6 7.Bd3 a5 8.ba5 Ra5 9.c4 dc4 10.Bc4 Qe7 11.Ne2 Nf6 12.0–0 (12.Bc3 Ra7=) 12...Be6 13.Nd2 0–0 (13...Nd5 14.Re1 Qh4 15.Ng3+–) 14.Qb3+= Bc4 (better is 14...Re8!? 15.Qb7 Ne4 16.Be6 Qe6 17.Ne4 fe4+=) 15.Nc4+– Rd5 16.Rfe1 (16.Nc3 Qf7 17.Nd5 Qd5+–) 16...Qf7 17.Ne5 (worse is 17.Qb7 Nbd7+/–) 17...Be5 18.de5 Ne4?? (better is 18...Rd2 19.Qf7 Kf7+–) 19.e6 (19.Qb7?! Nc5 20.Qb4 Nd3+=) 19...Qe6 20.Nf4 (20.Qb7?! Rd7=) 20...Qf7 21.Nd5 Nc6 22.Rac1 Nd6 23.Rc6! bc6 24.Re7 Qd5 (24...cd5 25.Rf7 Kf7 26.Qd5 Ke7 27.Bg7 Rb8+–) 25.Rg7 1–0. Zemitis,Val – Bakkers,Max, email b4–01–03, 2001.

5.a3 e4 6.c4 (6.Nh3 Nf6 7.c4 c6 8.c5 b6 9.Be2=) 6...Nf6 7.Nc3 (7.Nh3 c6 8.c5 b6 9.Be2=) 7...c6 (7...Be6 8.cd5 Nd5 9.Nd5=) 8.cd5 cd5 9.Nh3 Bd6 10.Rc1 Nc6 11.Be2 0–0 12.0–0 Ne7 13.Nb5 Bb8 14.Qc2 Nc6 15.Nc3 (15.f4 ef3 16.Rf3 Re8+=) 15...f4 16.Nf4 Bf4 17.ef4 Nd4 18.Qd1 Ne2 19.Ne2 Bg4 20.h3 Be2 21.Qe2 a5 22.b5 Qd6 23.Qd2 Rfd8 24.Rfd1 Nh5 25.g3 (25.Be5 Qa3 26.Qe2 g6=) 25...Rd7 26.Kh2 Rf8 (26...Nf6 27.Qe3=) 27.Bd4 (worse is 27.Qa5 Nf4 28.Bd4 Nd3 29.Rd3 ed3–/+) 27...Ra8 (worse is 27...Qa3 28.Bc5 Qd3 29.Qd3 ed3 30.Bf8 Kf8 31.Rd3+–) 28.Rc3 Nf6 29.Rdc1 Ne8 30.Rc5 (30.b6 Rdd8+=) 30...Rad8 (30...Qe6 31.Bc3=) 31.a4+= (31.Qa5? b6 32.Rd5 ba5 33.Rd6 Nd6–+) 31...Kf7 32.Qb2 (32.Qa5? b6 33.Rd5 ba5 34.Rd6 Rd6–+) 32...Kg8 33.b6 Qe6 34.Ra5 Nd6 35.Ra7 Nc4 36.Qb4 Rf7 37.a5 Qf5 38.a6 h5 (38...ba6 39.b7 (39.Ra6?! Rb7+/–) 39...Rb8 40.Rc4 dc4 41.Be5+–) 39.ab7 Rb8 40.Qc5 (40.Qc5 Kh7 41.Qc8+–) 1–0. Rosner,Dirk (1830) – Blankenberg,Bruno (1960), DESC, 2000.

5.de5 Bb4 6.Bc3 Bc3 7.Nc3 c6 8.Nf3 Ne7 9.Qd4 =.

4.d4 Nd7

5.a3 Ngf6 6.c4 Be7 7.de5 de5 8.c5 0–0 9.Nf3 Ne4 10.Bc4 Kh8 11.0–0 Bf6 12.Be6 Ng5 (12...f4!?+/–) 13.Bf5 Nb8 14.Bc8 Qd1 15.Rd1 Nf3 16.gf3 Rc8 17.Nc3 Nc6 18.Nd5 a6 19.f4 h6 20.Kh1 Kh7 21.e4 Bh4 22.fe5 Bf2 23.e6 Rab8 24.Rd3 Bh4 25.Rg1 Rg8 26.Rf3 Bg5 27.Rf7 Nd8 28.h4 Nf7 29.ef7 (29.hg5 Ng5 30.Nc7 Ne4+=) 29...Rgf8 30.hg5 hg5 31.Rf1 Rbd8 32.e5 (32.e5 Rd5 33.e6+–; worse is 32.Nc7 Kg6+–) 1–0. Woelfelschneider,Peter (2045) – Clark,Robert William (1720), CFriend SI–2004–0–00022 email, 2004.

5.a3 Ngf6 6.Nh3 g6 (6...Be7 7.Ng5 Nb6 8.de5 de5 9.Qd8 Bd8 10.Be5+=) 7.de5 (7.Ng5 Nb6 8.de5 Ng4 9.ed6 Rg8+/–) 7...de5 8.Ng5 h6? (better is 8...Bd6 9.Bc4 Qe7+=) 9.Ne6+– Qe7 10.Nc7 Kd8 11.Na8 b6 12.Qf3 e4 (12...Ne4 13.Nc3 Bb7 14.Bb5+–) 13.Qg3 Nd5 (13...Qd6 14.Qg6 Bb7 15.Nb6 Rg8 16.Qf5 ab6+–) 14.Bh8 Bg7 15.Bg7 Qg7 16.Ra2 Nc3 (16...Bb7 17.c4 f4 18.ef4 Ne7 19.Nb6 ab6+–) 17.Qc7 Ke7 18.Nc3 (18…Bb7 19.Bb5+–) 1–0. kamret (2210) – turborago (1950), GameColony.com, 2003.

5.Bc4 Nb6 6.Bg8 Rg8 7.Qh5 (7.de5 de5 8.Be5 Bb4 9.c3 Qd1 10.Kd1=) 7...Ke7 (better is 7...g6!? 8.Qh7 Rg7=) 8.Qh7+= Kf7 9.Nf3 Be7 (9...e4!? 10.Qh5 g6 11.Ng5 Ke8+=) 10.de5+– 1–0. Zimmer,Georg – Garcia,C, corr SOK–91–75, 1991.

5.Bc4 d5 6.Bd5 Bb4 7.c3=.

5.Bc4! Ngf6.

5.d5 Ngf6 6.Nh3 Nb6 7.c4 Bd7 8.Nc3 a5 9.a3 ab4 10.ab4 Ra1 11.Qa1 Be7 12.Be2 0–0 13.f4 c6 14.Qd1 e4 15.0–0 cd5 16.cd5 Qc7 17.Qb3 Rc8 18.Rc1 Nc4 (18...Qd8 19.Ra1=) 19.Nd1 (better is 19.Ne4 Ne4 20.Rc4+/– (20.Bc4? Bb5–+)) 19...b5+= 20.Bd4 Nd5 21.Nb2 Ndb6 (21...Be6!? 22.Nc4 Nf6+=) 22.Bb6= Qb6 23.Nc4 Be6 (better is 23...bc4 24.Bc4 Kh8+=) 24.Kf2?? (24.Nb6 Rc1 25.Qd1 Rd1 26.Bd1=) 24...bc4 (24...Bc4?! 25.Bc4 Kh8 26.Rc2 bc4 27.Rc4+=) 25.Bc4 Rc4 (better is 25...Kh8!? 26.Qa2 d5 (26...Qb4? 27.Be6 Rf8 28.Rc7+–) 27.Bd5 Rc1 28.Be6 Rc3–+) 26.Rc4+= Kf7 (26...Qb5!? 27.Rc8 Kf7 28.Rf8 Kf8 29.Qe6 h6=) 27.Qc2 (27.Qc3 Bc4 28.Qc4 Kg6 29.Qe6 Bf6+/–) 27...d5? Exerts pressure on the isolated pawn (27...Kg6 28.Rc7 Bh4 29.g3+=) 28.Rc6 (28.Rc7 Qb4 29.Ng5 Kf6 30.Ra7+– (30.Nh7?! Kg6 31.Rc6 Kh7 32.Re6 d4+/–)) 28...Qb4= 29.Ng5 Bg5 30.fg5 d4 31.ed4 Qd4 32.Ke2 (32.Kf1 Bd5 33.Rc5 Kg6+=) 32...f4 (better is 32...Qg1!? 33.g6 hg6 34.Rc7 Kg8–+) 33.Rc7= Kg6 34.h3 (34.Qc6 Qb2 35.Kf1 Qb1 36.Ke2 Qa2 37.Kd1+=) 34...Kg5–/+ 35.Rc5 Bf5 36.Kf1 g6 37.Rc4 Qa1 38.Qc1 Qa6 (38...Qc1 39.Rc1 Kh4 40.Kf2–+) 39.Kg1 Qb6 40.Kh1 (better is 40.Rc5 Kh5 41.g4 fg3 42.Kg2–/+) 40...e3?? (better is 40...Qf2–+) 41.h4= Kh6 42.Rf4 Qb1 43.Qb1 Bb1 44.Rf3 e2 45.Re3 Kh5 46.g3 (46.Re2 Kh4 47.Kg1 Kg3+/–) 46...Kg4 (46...Bd3 47.Kg2+=) 47.Kg2+/– (worse is 47.Re2 Kg3 48.Rg2 Kh4 49.Rh2 Kg4 50.Rh7 g5=) 47...g5 (47...Bd3!?+/–) 48.hg5+– (48.Re2?! gh4 49.Re1 Bf5=) 48...Kg5 49.Re2 Kg4 50.Rb2 Be4 51.Kf2 Bg6 52.Rb4 Kg5 53.Kf3 Kf5 (53...h5 54.Rb5 Bf5 55.Rd5+–) 54.Rb5 Kf6 55.Kf4 Bd3 56.Rb6 Kg7 57.Kg5 Kf7 (57...Bc4 58.Rb7 Bf7 59.g4+–) 58.g4 Bg6 (58...Be4 59.Kh6+–) 59.Kh6 Be4 60.g5 Bd3 (60...Ke7 61.Rb4 Bf5 62.Rb7 Ke6 63.Rh7+–) 61.Rb7 Kg8 62.Rg7 Kh8 63.Rd7 (63.Rd7 Bc4 64.Rh7 Kg8 65.g6+–) 1–0. Koerner,Helmut (1985) – Prix,Siegfried (1760), Berlin Lichtenberger op, 2007.

5.Qf3 Ngf6 6.Nd2 Be7 7.Qf5 Kf8 8.de5 Ne5 9.Qf4 Ke8 +/–. guest1602 – guest1601, ICC, 2003.

5.Nf3 e4 6.Nfd2 d5 7.a3 Ngf6 8.c4 c6 9.Nc3 a6 (9...Nb6 10.c5 Nbd7 11.b5=) 10.Qb3+= Nb6 11.c5 Nbd7 12.Be2 g6 (12...Be7 13.0–0+=) 13.a4 White prepares the advance b5 13...Bg7 14.b5 0–0 15.0–0 Qc7 (15...Qa5 16.f3+=) 16.Na2 (16.f3 ef3 17.b6 f2 18.Rf2 Qd8+=) 16...h6 (16...cb5 17.ab5 b6 18.Nb4+–) 17.Nb4 (17.f3 ef3 18.b6 f2 19.Rf2 Qd8+=) 17...Kh7 (17...f4 18.f3 ef3 19.Rf3 fe3 20.b6=) 18.g3 (18.f3 ef3 19.b6 f2 20.Rf2 Qd8+=) 18...g5 Black prepares f4 (18...a5 19.b6 Qd8 20.Nc2+=) 19.Qc2 (19.f3 g4 20.f4 Kg8=) 19...Ng8 Black plans f4 (19...f4 20.Rfb1=) 20.Bc3 (20.f3 Ngf6+=) 20...Ne7 (20...f4 21.bc6 bc6 22.Ne4 de4 23.Qe4 Kh8 24.Bd3=) 21.Na2 (21.f3 ef3 22.b6 Qd8 23.Bf3 Nf6+=) 21...Nf6 (21...cb5 22.ab5 ab5 23.Bb5=) 22.Nb3 (22.f3 ef3 23.b6 f2 24.Rf2 Qd7+=) 22...f4 (22...cb5 23.ab5 f4 24.Ba5=) 23.Ba5 Qb8 24.Rfb1 (24.ba6 fg3 25.fg3 ba6=) 24...ab5 (24...fg3 25.fg3 Ng4 26.Qd2=) 25.ab5 Bg4 (25...fg3 26.fg3 Nf5 27.bc6 bc6 28.Nb4=) 26.Nc3 (26.f3 Be6 27.gf4 gf4+=) 26...fe3 27.fe3 Qe8 (27...Nf5 28.bc6 Ne3 29.Qd2 Be2 A) 30.Ne2 Nc4 31.c7 Nd2 32.cb8Q Nf3 (32...Rab8? 33.Nd2 Rf7 34.c6+–) 33.Kf2 Rab8–+; B) worse is 30.Qe3 Bd3+=; C) 30.Qe2=) 28.Ne4 Threatening mate: Nxf6 28...Bf5 (28...de4 29.Bg4 Ng4 30.Qe4 Nf5 31.Qg4 Qe3 32.Kh1 Nd4 33.Nd2 Nb5 34.Qd7–+) 29.Nf6+= Rf6 30.Bd3 Qg6 31.Bf5 Nf5 32.bc6 (32.e4 Ne3 33.Qd3 Qe4 34.Qe4 de4–/+) 32...bc6+= 33.Bd2 Raf8 (33...Re8 34.Qc3+=) 34.Rf1 (34.Ra7 R8f7 35.Rf7 Rf7+=) 34...Kh8 (34...Ne7 35.Qg6 Kg6 36.Rf6 Kf6 37.Rf1 Ke6 38.Rf8 Bf8+=) 35.Qd3+= Ng3 (35...Nd4 36.Qg6 Ne2 37.Kg2 Rg6 38.Rf8 Bf8 39.Kf3+–) 36.Qg6= Ne2 (36...Rg6?? 37.Rf8 Bf8 38.hg3+–) 37.Kg2 (37.Kh1 Rg6 38.Rf8 Bf8 39.Re1+–) 37...Rg6+– 38.Rf8 Bf8 39.Kf2 (39.Kf3 Nd4 40.ed4 Rf6 41.Kg4 Kg7+–) 39...Nd4 40.ed4 (40.Nd4 Rf6 41.Ke2 Bc5+–) 40...h5 (40...Rf6 41.Kg3+–) 41.Ra7 h4 (41...Bg7 42.Re7+–) 42.Rc7 (42.Ke3 Rg7 43.Rg7 Bg7+–) 42...g4 43.Bf4 Rf6 44.Ke3 Bh6 (44...Bg7 45.Rb7+–) 45.Bh6 Rf3 (45...Rh6 46.Kf4 Rg6 47.Kf5+–) 46.Ke2 Rb3 47.Bf4 (47.Rc6 Rb2 48.Bd2 Kg7+–) 47...Rb2 48.Kd1 (48.Kd3 g3 49.Be5 Kg8 50.hg3 hg3 51.Rg7 Kf8 52.Rg3 Rb3 53.Ke2 Rg3 54.Bg3 Ke7+–) 48...Rb4 (48...g3 49.hg3 h3 50.Rc6+–) 49.Kc2 (49.Be5 Kg8+–) 49...Rc4 (49...Kg8 50.Rc6 g3+–) 50.Kd3 Ra4 51.Rc6 Ra3 52.Kc2 Rf3 (52...Kg7 53.Be5 Kf7 54.Rf6 Ke7 55.Kb2+–) 53.Be5 Kg8 (53...Kh7 54.Rf6+–) 54.Rg6 Kf7 55.Rg4 Ke6 (55...h3 56.c6 Ke6 57.c7+–) 56.Rh4 Rf2 57.Kd3 Kd7 (57...Rf3 58.Ke2 Rb3 59.Rh6 Kd7 60.Rd6 Kc8 61.Rd5 Rb2 62.Kd3 Rb3 63.Ke4+–) 58.Rh6 Rf8 (58...Ke7 59.Bd6 Ke8 60.Rh7+–) 59.Rd6 Kc8 60.Rd5 Rf2 (60...Rf1 61.h4+–) 61.c6 (61.h4 Rf3 62.Ke4 Rh3+–) 61...Rd2 62.Ke4 (62.Kd2?!=) 62...Re2 (62...Rc2 63.Rd6+–) 63.Kf5 Rf2 (63...Rc2 64.Rd6+–) 64.Ke6 Rf8 (64...Rc2 65.Kd6 Re2+–) 65.Ra5 Re8 66.Kd6 Re6 (66...Rd8 67.Ke7 Re8 68.Kf7 Re7 69.Kf6 Re5 70.Ke5 Kc7 71.d5 Kd8 72.d6 Ke8 73.Kf6 Kd8 74.Ra8) 67.Kc5 1–0. Bott,Hans Joachim – Hans,Sven, Baden–ch HT1, 1994.

5.Nf3 e4 6.Nfd2 d5 7.c4 c6 8.cd5 cd5 9.Bb5 a6 10.Ba4 b5 11.Bb3= Ngf6 12.Nc3 Nb6 13.0–0 Bb4–/+ 14.a4 Bd7 15.a5? Nc4–+ 16.Nc4 bc4 17.Ba4 0–0 18.Bd7 Nd7?? 19.Qa4?? Rb8 20.Na2? Bd6 21.Nb4?? Bb4 22.Rfb1 Rb5 23.Qc2 Ba5 24.Ba3 Rf6 25.Rb5 ab5 26.Bc5 Nc5 27.dc5 Bc7 28.Ra7 Rh6 29.h3 Bb8 30.Rb7 Bc7 31.Qb2?? f4 32.Qb4 fe3 33.Qb5 ef2 34.Kf1 e3 35.c6 Rf6 36.Qb2 Qe7 37.Qe2 d4 38.Qc4 Kf8 39.Qd4 e2# 0–1. gtate (1995) – sammyo (2075), net–chess.com, 2004.

5.Qh5 g6 6.Qf3 d5 7.Qd5 Bb4 8.Bc3 Bd6 =.

4.d4 e4

5.c4 c6 6.Be2 (6.Nc3 Nf6 7.Nh3 (7.a3 Be7 8.Nge2 0–0 9.Nf4 g5 10.Nh5+=; 7.d5 Be7 8.Nh3 0–0 9.Nf4 c5 10.a3=; 7.Nge2 d5 8.c5 Be7 9.Nf4 0–0 10.Be2=; 7.Qb3 d5 8.Nh3 Bd6 9.b5 Qa5 10.Be2+=) 7...d5 8.Qb3 Bd6 9.b5 Qa5 10.Be2+=; 6.Nh3 d5 7.c5 b6 8.Be2 Nf6 9.0–0 Be7 10.Nf4=; 6.a3 Nf6 7.Nc3 (7.Nh3 d5 8.c5 b6 9.Be2 a5 10.Nc3=; 7.Ne2 a5 8.d5 ab4 9.ab4 Ra1 10.Ba1=; 7.Be2 d5 8.c5 b6 9.Nh3 a5 10.Nc3=; 7.d5 Be7 8.Nh3 0–0 9.Be2 cd5 10.cd5+=) 7...Be7 8.Nge2 0–0 9.Nf4 g5 10.Nh5+=) 6...d5 (6...Qg5 7.g3 Nf6 8.Nh3 Qh6 9.Nf4 d5 10.a3=) 7.c5 Nf6 (7...Qg5 8.Bf1 Nf6 9.Nh3 Qh4 10.b5=) 8.Nh3 Be7 (8...b6 9.Nc3 a5 10.Na4=) 9.0–0 0–0 (9...b6 10.Nc3=) 10.a4 (10.Nc3=) 10...Ng4 11.b5 Rf6 (11...Qc7 12.Nf4=) 12.Nf4+= g5 13.Nh5 Rh6 14.Bg4 fg4 15.Ng3 Be6 16.Qe2 Nd7 17.bc6 bc6 18.Qa6 Rb8 19.Bc3 Qc7 20.Ba5 (20.Nd2 Bf6 21.Ba5 Qb7 22.Qb7 Rb7+/–) 20...Qb7 21.Qb7 Rb7 22.Nc3 Rf6 (22...a6 23.Rab1 Rb8 24.Rb8 Nb8 25.Rb1+–) 23.Rfb1 Rb1 24.Rb1 ½–½. Oliveira,Leonardo – Chang,Suzana, BRA–ch66 sf2, 1999.

5.c4 d5 6.a3 Nf6 7.Be2 (7.Nh3 c6 8.Nc3 Bd6 9.cd5 cd5 10.Rc1=) 7...Be7 8.Nh3 Nbd7 9.Nf4 Bd6 10.Nd5+=.

5.c4 Nf6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.d4 e4).

5.Nd2 Nf6 (5...d5 6.a3 Nf6 (6...a5 7.b5 Nf6 8.c4 Bd6 9.c5 Be7 10.Ne2=) 7.c4 Be7 8.Ne2 dc4 9.Nc3 a5 10.Qa4=) 6.c4 c6 (6...d5 7.c5 Be7 8.Ne2 0–0 9.Nf4 a6 10.a3=; 6...Be7 7.d5 a5 8.a3 0–0 9.Ne2 Bd7 10.Nf4=) 7.Nh3 (7.d5 cd5 8.cd5 Nd5 9.Ne4 Nb4 10.Qh5+=; 7.Be2 d5 8.c5 b6 9.Rc1 Be7 10.Nh3=) 7...d5 8.a3 (8.c5 Be7 9.Be2 b6 10.Nf4=) 8...Bd6 (8...a5 9.Qa4 Nbd7 10.b5=) 9.Be2 0–0 (9...Ng4 10.Qb3=) 10.0–0 (10.Qb3=) 10...Ng4 11.g3 Qf6 12.cd5 cd5 13.Re1 (13.Qb3 Be6=) 13...Qh6+= 14.Bf1 Nd7 15.Nb3 (15.Qb3 Ngf6+=) 15...Ndf6 16.Rc1 g5 (16...b6 17.Qe2+=) 17.Bg2 (17.Qe2 f4 18.ef4 gf4+=) 17...f4 18.ef4 gf4 19.Rc3 (better is 19.Qd2!?–/+) 19...f3–+ 20.Bf1? (20.Bc1 Qh5 21.Rc8 Rac8 22.Bf1–+) 20...Nh2! 21.Bc1 (21.Kh2 Bh3) 21...Qh5 22.Kh2 (22.Qd2 Nf1 23.Qg5 Qg5 24.Ng5 (24.Bg5?? Ng3 25.Rc8 Rac8–+) 24...Ng3 25.fg3 Bg3 26.Rf1–+) 22...Bh3 23.Kg1 Bf1 24.Rf3 ef3 (24...ef3 25.Qf3 Qf3 26.Rf1 Qb3–+) 0–1. Meisinger,Peter (1710) – Blankenberg,Bruno (1960), DESC, 2000.

5.d5 Ne7 6.c4 (6.Qh5 Ng6+= A) 7.Ne2 Qh4 (7...Qd7; 7...Qe7) 8.Qh4 Nh4 9.Nf4 Ng6 10.Ng6 hg6+=; B) 7.Nh3 Qh4 8.Be2 Qh5 9.Bh5 Kf7 10.Nf4 Be7+=; 6.Nh3 Nd7 (6...Ng8) 7.Qh5 g6 8.Qh4 Ne5 9.Nc3 Bg7 10.Nf4 Nf7=) 6...Bd7 (6...Ng6 A) 7.Ne2+= a5 (7...Bd7 8.a3 a5 9.b5 Qg5 10.Nd2 Kf7+=) 8.a3 Nd7 9.Nd4 Nde5 10.Nc3 Be7=; B) 7.Nh3 a5 (7...Ne5 8.Nf4 g6 9.Be2 a5 10.a3 Bg7+=) 8.a3 Nd7 9.Be2 Nde5 10.0–0 Be7=; C) 7.Qh5 a5 (7...Qh4 8.Qh4 Nh4 9.Na3 Na6 10.Nc2 Bd7+=; 7...Qe7 8.Nh3 Nd7 9.Nf4 Nf6 10.Ng6 Nh5+=) 8.a3 Nd7 9.Qf5 Nc5 10.Qh5 Nb3+=; 6...a5 7.Qh5 Ng6 8.b5 Qh4 9.Qh4 Nh4 10.Nd2 Nd7+=) 7.a4 (7.Qh5 Ng6+= 8.Ne2 Qh4 9.Qh4 Nh4 10.Nf4 a5+=; 7.Nh3 Ng8 8.Be2 Nf6 9.0–0 Na6 10.a3 Be7+/–) 7...c6 (7...Ng8 8.Nh3 Nf6 9.Be2 Na6 10.Qd2 c5+=; 7...Ng6 8.Nd2 Ne5 9.c5 Be7 10.Nc4 Nc4+=) 8.dc6 (8.Qh5 Ng6+= 9.Ne2 Na6 10.Nf4 Qh4+=) 8...Nbc6= (worse is 8...Bc6 9.Qh5 g6 10.Qh4+/– Rg8+/–) 9.b5 (worse is 9.Qd6 Ng6 10.Qd2 Bb4–/+) 9...Nb4 (9...Ne5 10.Qd6 N7g6 11.Qd5=) 10.Qb3 (better is 10.a5+= d5+=) 10...Qa5?? (better is 10...a5+=) 11.Bc3+– d5 (11...Be6 12.Bb4 Qc7 13.Nd2+–) 12.Qb4 (12.Bb4 Qc7+–) 12...Qb4 13.Bb4 dc4 14.Bc4 Rc8 (14...Nc8 15.Bf8 Rf8 16.Bd5+–) 15.Nd2 Ng6 16.Bf8 Rf8 17.Ne2 (17.Bd5 Rc7+–) 17...h5 (17...Ne5 18.Bd5+–) 18.0–0 h4 (18...Ke7 19.Nd4+–) 19.Rfc1 h3 (19...Ne5 20.Bd5 Nd3 21.Rc8 Bc8 22.f3 ef3 23.Nf3+–) 20.Bd5 Nh4 (20...b6 21.Rc8 Bc8 22.Nd4+–) 21.Bb7 (21.g3 Ng2+–) 21...Rb8 (21...Rc1 22.Rc1 Ng2 23.Nd4+–) 22.Bc6 (22.Rc7 hg2 23.Bd5 Rc8+–) 22...Bc6 23.Rc6 hg2 24.Rac1 Rd8 25.Rc8 (25.Nc4 Rf6+–) 25...Kf7 (25...Rf7 26.Rd8 Kd8 27.Nc4+–) 26.R1c7 (26.R8c7 Kg8 27.Nd4 Ra8+–) 26...Kg8 (26...Kf6 27.Rd8 Rd8 28.Nd4+–) 27.Rd8 Rd8 28.Nd4 f4 29.Rg7! Kg7 30.Ne6 Kf6 31.Nd8 Kf5 32.Nc6 fe3 33.fe3 Kg4 (33...Nf3 34.Nf3 ef3 35.Nd4 Ke4 36.Nf3+–) 34.Ne4 (better is 34.Na7!? Ng6+–) 34...Kf3 35.Ng5 Ke3 (35...Kg4 36.Ne6 Kf5 37.Nf4+–) 36.Nh3 (better is 36.a5 Kf4+–) 36...Kf3 37.Ne5 (better is 37.Na7 Nf5+–) 37...Ke4 38.Ng4 Kd5 (38...Kf3 39.Nhf2+–) 39.Nhf2 (better is 39.Nf4 Kc4 40.Ne5 Kb4 41.Nc6 Ka4 42.Na7 Ka5+–) 39...Kc4 40.Nd1 Kb4 41.Nb2 Kb3 (41...Ng6 42.Ne3 Nf4 43.Nec4+–) 42.Ne3 (better is 42.a5 Nf3 43.Kg2+–) 42...Kb2 43.a5 (43.Ng2 Nf3 44.Kf2 Kc2 45.Kf3 Kc3+–) 43...Kb3 (43...Nf3 44.Kg2 Nd4+–) 44.b6 ab6 45.ab6 Nf3 46.Kg2 Ne5 47.h4 Kb4 48.b7 Nd7 49.h5 Kb5 50.h6 1–0. mtr – softi, internet, 2001.

5.Nh3 d5 6.a3 Nf6 7.c4 c6 (7...a5 8.b5+=) 8.Nc3+/– Be6 9.cd5 cd5 10.Nf4 (10.Be2!?+/–) 10...Bf7+= 11.Bb5 Nbd7 12.Qb3 (12.0–0 Bd6+=) 12...a6= 13.Be2 Nb6 14.0–0 Bd6 15.Nh3 h6 16.a4 (16.Rac1 0–0=) 16...Rc8 17.Rac1 (17.Rfc1 0–0=) 17...0–0 18.Nb1 (18.Rfe1!?+=) 18...Nc4–/+ 19.Bc3 Qc7 20.g3 b5 21.ab5 ab5 22.Na3 Qb8 23.Nc4 dc4 24.Qb2 Nd5 25.Nf4 g5 26.Nd5 Bd5 27.Ra1 f4 28.ef4 (28.Bg4 Rc7+=) 28...gf4–/+ 29.Bg4 (29.Bd1 Qb7 30.Bh5 Rc7–+) 29...Rc7 30.Qe2 (better is 30.Ra6!? Rf6 31.Bh3–+) 30...Rg7–+ 31.f3? (31.Ra6–+) 31...e3 32.Kh1 (32.h3–+) 32...Rg4 33.gf4 (33.Qg2 fg3 34.h3 Rh4–+) 33...Bf4 (better is 33...Qb7 34.h3 Rg3 35.Ra7 Qa7 36.Be1 Rh3 37.Kg2–+) 34.Rg1 Rg1 35.Rg1 Bg5 36.Rg3 Qf4 (36...Qf4 37.Kg1 Bf3 38.Rf3 Qf3 39.Qf3 Rf3–+) 0–1. Koerner,Helmut (1935) – Korb,Viktor (1625), Berlin GER, 2012.

5.Nh3 Nf6 6.d5 Be7 7.Bf6 (better is 7.Nf4!?=) 7...Bf6–/+ 8.c3 0–0 9.Nf4 Bh4 (9...Be5 10.a4–/+) 10.Be2 Qf6 11.0–0 b6 (11...Qh6 12.Na3=+) 12.b5 (12.Na3 a6= (< 12...Qc3 13.Nb5 Qb4 14.Nc7+–)) 12...a6 13.Nd2 Qc3 14.Rc1 Qf6 15.Rc7 ab5 16.Bb5 Ra2 17.Nc4 Na6 (better is 17...Qd8 18.Rc8 Qc8=) 18.Ne6?? (18.Nh5 Nc7 19.Nf6 Rf6 20.Qb3+/–) 18...Nc7–+ 19.Nf8 Nb5 20.Ne6 Be6 21.de6 Qe6 22.Qb3 Na3 23.Qa2 Nc4 24.Qa8 Kf7 25.Ra1 Ne5 26.Qh8 Qh6 27.Ra8 Ng4 28.Qf8 Kg6 29.Qd6 Kh5 (30.Qh6 Kh6–+) 0–1. PoPer – snake20, Live Game Caissa's Web, 2004.

5.d5 Nf6

6.Bb5 c6 7.Ba4 b5 (7...Be7 8.Ne2 (8.dc6; 8.c4) 8...b5 9.Bb3 a5 10.dc6 ab4 11.a4=; 7...Bd7 8.c4 cd5 9.cd5 b5 10.Bb3 Be7 11.Ne2=) 8.Bb3 c5 (8...Na6 9.a3 (9.Qd4 c5 10.bc5 dc5 11.Qe5 Kf7 12.c4–+) 9...Nd5 10.Bd5 cd5 11.Nh3=; 8...a5 9.a3 ab4 10.ab4 Ra1 11.Ba1=) 9.c4 (9.a4 ba4 10.Ba4 Bd7 11.Bd7 Nbd7=) 9...bc4 10.Bc4 Be7 (10...cb4 11.Qa4 Nbd7 12.Ne2=) 11.Nh3 (11.bc5 dc5 12.Nc3 Bd6=; 11.Qa4=) 11...0–0 (11...cb4 12.Qa4 Nbd7 13.Nf4=) 12.b5 (12.bc5 Qa5 13.Nd2 Ba6+=) 12...a6 13.a4 ab5 14.ab5 Ra1 15.Ba1 Nbd7 16.Nf4 Nb6 17.Qb3 g5 18.Ne2 (18.Nh3 Nfd7+=) 18...Bd7 19.Nd2 (19.Bf6 Bf6 20.Nd2 A) worse is 20...Nc4 21.Nc4 (21.Qc4? Qa5–+) 21...Qa8 22.0–0+=; B) 20...Qa8–/+) 19...Qa8 20.0–0 Nc4 21.Qc4 (21.Nc4 Qd5 (21...Nd5? 22.Nb6 Qb7 23.Nd7+–) 22.Rd1 Qf7 23.Bf6 Bf6 24.Rd6 Be6+=) 21...Qa5 (21...Qd5!? 22.Bf6 Qc4 23.Nc4 Bf6–+) 22.Nc3+= Ne8 (22...Rb8!?+=) 23.Nb3 (23.Qb3 Qb6+=) 23...Qb6= 24.Bb2 (24.Rb1!?=) 24...Nc7+= The pressure on the isolated pawn grows 25.Na4?? (better is 25.Rd1+=) 25...Qb5–+ 26.Nb6 (26.Qc3 Bf6 27.Qc2 Qa4 28.Bf6 Rf6–+) 26...Qb6 27.Rb1 (27.Ra1 Bb5 28.Qc1 Nd5–+) 27...Qb4 28.Qb4 cb4 29.Bd4 (29.Ra1 Nd5 30.Ra5 Nc3–+) 29...Nb5 (29...Nd5 30.Kf1–+) 30.Bb6 (30.Na5 Nd4 31.ed4 Ra8–+) 30...Nc3 31.Ra1 Ba4 32.Ra4 (32.Nd2 Ra8–+) 32...Na4 33.Ba5 (33.Bd4 Nc3–+) 33...Bf6 (33...Nc5 34.Nd2 Rb8 35.h4–+) 34.Kf1 (34.f3 Be5 35.h4 gh4–+) 34...Rc8 (34...Nc3!? 35.g4 Nd5 36.gf5–+) 35.g4 f4 (35...Nc5!? 36.Nd2 b3 37.Bb4–+) 36.ef4 gf4 37.Nd2 (37.Bb4 f3 38.Be1–+) 37...f3 0–1. Hirt,Rudi – Walther,Joachim, corr DDR–ch MG01, 1986.

6.Nc3 Be7 7.Nge2 Nbd7 (7...a5 8.a3 (8.b5 Nbd7 9.Nf4 Ne5 10.Be2 0–0 11.0–0 Qe8 12.b6 c6 13.dc6) 8...0–0 9.Nd4 Na6 10.Bc4 Bd7 11.0–0 ab4 12.ab4 Nb4 13.Qd2) 8.Nd4 Ne5 9.Bb5 Bd7 (9...Kf7 10.0–0+= (10.f4 ef3 11.gf3 a5 12.ba5 c6 13.dc6) 10...Bd7 11.Be2 c5 12.bc5 dc5 13.Ne6) 10.Ne6+/– Qc8 11.Bd7 (11.Ng7 Kf7 12.Bd7 Qd7 13.Ne6) 11...Kd7 (11...Qd7 12.Nb5 (12.Ng7 Kf7 13.Ne6) 12...Kf7 13.Nc3+= (13.Nbc7?! Rac8 14.Ng5 Kg8=)) 12.0–0 Qe8 (better is 12...Qg8!?+/– 13.b5) 13.Nb5+– Qg6 (13...Qh5 14.Qd2 c6 15.Nbc7 (15.Ng7?! Nf3 16.gf3 Qh3 17.dc6 bc6 18.fe4 Qg4 19.Kh1 Qf3 20.Kg1 Qg4 21.Kh1 Qf3 22.Kg1 Qg4=) 15...cd5 16.Na8+/–) 14.Be5 (14.Nbc7?! Rac8 15.Be5 de5+/–) 14...de5 15.c4 (15.Nbc7?! Rac8 16.Nb5 a6+/–) 15...Bb4 (15...Ne8 16.Qa4 Kc8+–) 16.Nbc7 f4 (16...b5 17.Qb3 a5 18.Na8 Ra8+–) 17.Qa4 Kc8 18.Qb4 f3 19.g3 Qg4 20.Na8 Qh3 21.Qc5 Kd7 22.Qc7 Ke8 23.Ng7 Kf8 24.Ne6 Ke8 25.Qd8 Kf7 26.Ng5 Kg6 27.Qf6! Kf6 28.Nh3 Ra8 29.Rab1 b6 30.c5! bc5 31.Rfc1 Kf5 32.Rb7 (32.Rc5 Rg8+–) 32...Rh8 33.Rg7 h5 34.Rc5 h4 35.Rc6 Rf8 36.g4 1–0. pierre – danso, internet, 2011.

6.c4 Na6 7.Ne2 Be7 8.Nf4 g5 9.Ne2 h5 +=.

6.c4 c5 7.a3 Be7 8.Be2 Nbd7 9.Nh3 0–0 +=.

6.c4 Bd7 7.f4 Be7+= 8.h3 c6 (8...0–0 9.a3 a5 10.Ne2 ab4 11.ab4 Na6+=) 9.Be2 (9.a3 0–0 10.Kf2 Qb6 11.Be2 a5+=) 9...c5 (9...0–0 10.g4+= (10.a3 cd5 11.cd5 b5+=) 10...Qb6 11.Qb3 cd5=) 10.b5 (10.bc5 dc5 11.Be5 Qa5= (11...Kf7=)) 10...a6 (10...0–0 11.g4 a6+=) 11.a4 (11.Nc3 0–0+=) 11...0–0 12.g4 Qa5 (12...Ne8 13.Qc2+=) 13.Bc3= Qc7 14.g5 Ne8 15.h4 Qb6 (15...Qd8 16.h5=) 16.a5+= Qd8 17.b6 Bc8 18.h5 Nd7 19.Nd2 Nb6? (better is 19...h6+=) 20.ab6+– Qb6 21.Kf2 Qc7 22.Nf1 (22.h6 g6+–) 22...Bd7 23.Ng3 b6 24.Ra3 (24.h6 g6+–) 24...a5 (24...Qb7 25.h6 g6 26.Qb3+/–) 25.Qa1 a4 26.Nh3 Qb7 27.h6 g6 28.Nh5 (28.Nh5 gh5 29.Bg7=). vik – BenGrimm, internet, 2001.

6.c4 Qe7 7.Nh3 Nbd7 8.Nf4 Ne5 9.Nd2 g6 10.Nb3 b6 11.Nd4 Bb7 12.Nde6 Bg7 13.Ng7 Qg7 14.Ne6 Qd7 15.b5 Bc8 16.Be2 Qe7 17.Nd4 0–0 18.a4 Bd7 19.0–0 Rae8 (19...a6!?+=) 20.a5+/– Nf7 21.ab6 ab6 22.Ra7 Rc8 23.Qa4 Ne5 24.Ra1 Nfg4 25.h3 Nf2? (better is 25...Nf6+–) 26.Kf2 Qh4 Black prepares the advance f4 27.Kg1 f4 28.Qb3 (better is 28.ef4 Rf4 29.Qb3+–) 28...f3–/+ 29.gf3 (29.Nf3 ef3 30.Be5 fe2 31.g3–+) 29...Qg3 30.Kf1 (30.Kh1 Qh3 31.Kg1 Qg3 32.Kh1 Ng4 33.fg4 Rf2 34.Rc7 Qh2) 30...Bh3 0–1. Holdaway,Stewart A – Rossiter,Philip E, NZCCA CT0404, 2004.

6.c4 g6 7.Be2 a5=.

6.c4 g6 7.Be2 Bg7 8.Nh3 a5 9.b5 0–0 =.

6.c4 g6 7.h3 Bg7 8.g4 (8.Ne2 a5 9.a3 0–0=) 8...0–0 (8...fg4!? 9.Nd2 Qe7–/+) 9.g5+= Nh5 10.Bg7 Kg7 (10...Ng7 11.f4+=) 11.h4= f4 (11...Nd7 12.Be2=) 12.Nc3 (12.Qd4 Kg8=) 12...fe3 (12...Bf5 13.Qd4 Kg8 14.Bg2=) 13.Qd4 (worse is 13.fe3 Ng3 14.Bg2 Nh1 15.Qd4 Kg8 16.Bh1 Bf5–/+) 13...Kg8 14.Qe3 (worse is 14.Ne4 ef2 15.Nf2 Ng3–/+; worse is 14.fe3 Ng3 15.Bg2 Nh1 16.Bh1 Bf5–/+) 14...Bf5 15.Nge2 (15.Ne4?? Be4 16.Rh2 Re8–+) 15...Nd7 16.Nd4 Ne5 (16...a5 17.ba5 Nc5 18.Be2=) 17.Be2 (worse is 17.Ne4 Be4 18.Ne6 Bh1 19.Nd8 Rfd8–+; 17.Nf5?! Rf5 18.Ne4 Rf3=) 17...Nd3 18.Bd3 ed3 19.Ne6 (19.0–0–0 Qd7+=) 19...Be6= 20.de6 Nf4 21.0–0–0 (21.0–0 Rf5+=) 21...Qe7 (21...Qe8 22.Nd5 Nd5 23.cd5=) 22.Nd5+= Nd5 (22...Qe6 23.Qe6 Ne6 24.Rhe1+/–) 23.cd5 c6 (23...a5 24.b5 Rf5 25.Rd3+/–) 24.Rd3 (24.h5 cd5 25.Rd3 Rac8 26.Kd1 Qc7+=) 24...cd5 25.Rd5 Rac8 26.Kb2 (26.Kb1 Rc4 27.a3 Rcf4=) 26...Qc7 (26...Rc4 27.a3+=) 27.Rd2 (27.e7 Rfe8 28.Rc1 Qc1 29.Qc1 Rc1 30.Kc1 Kf7 31.Rd6 Ke7+/–) 27...a5 (27...Rf5 28.Rhd1 Re5 29.Qb3+/–) 28.e7 Rfe8 29.Qe6 Kh8 (29...Kg7 30.Qf6 Kg8 31.Qd6 Qc3 32.Kb1 Re7 33.Qe7 Qd2 34.Qe6 Kg7 35.Qc8 Qb4 36.Kc2 Qe4 37.Kc3 Qh1 38.Qd7 Kg8 39.Qe6 Kf8 40.Qd6 Ke8 41.Qe5 Kf7 42.Qf6 Kg8 43.Qd8 Kf7 44.Kd2+=) 30.Qf6 (30.Qd6 ab4 31.Qf6 Kg8+–) 30...Kg8 31.Re1 ab4 32.Kb1 (32.Qd6?! Qc3 33.Kb1 Re7=; 32.Rd6?! Qc2 33.Ka1 Re7 34.Qe7 Qc3 35.Kb1 Qc2 36.Ka1 Qc3 37.Kb1 Qc2 38.Ka1=) 32...Qc3 33.Qe6 (33.Qc3 Rc3 34.Rd6 Rc7+/–) 33...Kg7 34.Qd6 b3 (34...Rc5 35.Qd7 Rcc8 36.f4+/–) 35.a3 Qc7? (35...b5 36.Qe5 Kf7 37.Qc3 Rc3 38.Kb2 Rc2 39.Rc2 bc2 40.Kc2 Re7 41.Re7 Ke7 42.Kd3+–) 36.Qf6+– Kg8 37.Qe6 Kg7 38.h5 gh5 (38...Qc3 39.h6 Kh8 40.Qe5 Kg8 41.Qd5 Kh8 42.a4+–) 39.Qf6 Kg8 40.g6 hg6 (40...Re7 41.Qe7 Qe7 42.Re7 hg6+–) 41.Qg6 1–0. Janek – Bootfree, internet, 2017.

6.Be2 c6 7.Nc3 Be7 =.

6.Be2 Be7 7.Nh3 Nbd7 8.Nd2 0–0 (8...Nd5 9.Bg7 Bf6 10.Bh8 Bh8 11.Bc4 Ba1 12.Bd5+/–) 9.Nb3 Ne5 10.0–0 Bd7 11.c4 b6 (11...Qc8!?=) 12.Nd4+/– c5 13.dc6 Nc6 14.Nf4 Nd4 15.Qd4 (15.ed4?! a5=) 15...Rf7 16.Rac1 Rc8 17.Rfd1 Qe8 18.b5 Rc5 19.a4 Bc8 20.Qc3 Bb7 21.a5 g5? (better is 21...Qd7!?+/–) 22.Ne6+– g4? (22...Re5 23.a6 Bc8 24.Ng5 Rf8+–) 23.Nc5 bc5 24.Qc2 h5 25.a6 Ba8 26.Qc3 (26.b6 ab6 27.Ra1 h4+–) 26...Kh7 (26...Qd8 27.Ra1+–) 27.Qb3 (27.b6!? ab6 28.Ra1 Kg6+–) 27...Nd7 28.Rb1 Qf8 29.Qa3 f4 30.ef4 Rf4 31.Qe3 Bg5 32.h4! Bh6 (32...Bh4 33.g3 Double attack (33.g3 Decoy)) 33.Qg3 Bg7 (33...Qe7+–) 34.Bg7 Kg7 35.Rd2 (35.Rd6 Qd6 36.Rd1 Qc7 37.Rd7 Qd7 38.Qf4 Qd8+–) 35...Ne5 (35...Nb6 36.Ra1+–) 36.Rbd1 Kh8 (36...d5 37.Rd5 Bd5 38.Rd5 Ng6 39.Rh5 Qf6+–) 37.Rd6 Nd3 38.Rd7 1–0. gluv51 (2060) – nizef (1870), gameknot.com, 2015.

6.Ne2 c6 7.Nf4 cd5 8.Nd5 Be6 9.Bf6 gf6 10.Qh5 Kd7 11.Nf4 Nc6 12.Ne6 Ke6 13.c3 Be7 14.Nd2 d5 15.Nb3 Qe8 16.Qd1 Qg6 17.Rb1 Rhd8 18.Nc5 Bc5 19.bc5 Rab8 20.Rb2 Ne5 21.Qa4 Nd3 22.Bd3 ed3 23.0–0 (23.Qa7?! Qg2 24.Rf1 Qh2 25.Rb6 Kf7 26.Rb7 Kg8+=) 23...a6 24.Rb7!! Rb7 25.Qa6 Ke5 (25...Kf7 26.Qb7 Kg8+–) 26.f4 Ke4 27.Qe6 1–0. marre (2045) – Alve, GameColony.com, 2003.

6.Nh3 c6 7.Nc3 Be7 8.Be2 a5 9.b5 c5 10.0–0 Nbd7 11.Ng5 Ne5 12.Ne6 Be6 13.de6 Qc8 14.Nd5 Qd8 15.c4 (15.Ne7?! Qe7 16.Be5 de5+=) 15...0–0 16.a3 Nd5 17.Qd5 Qc7 18.Rad1 Rad8 19.Rd2 Bf6?? (better is 19...a4+/–) 20.e7+– (20.e7 Kh8 21.ed8R Rd8 22.Rfd1+–) 1–0. market (2185) – BOMBARDERO (1990), GameColony.com, 2002.

6.Nh3 Be7 7.Nf4 0–0 8.Bc4 g5 (8...Ng4 9.0–0 Bf6 10.Nc3 Be5 11.h3+=) 9.Ne2 Nbd7 10.h4 (10.0–0 Nb6 11.Bb3=) 10...g4 11.Nf4 Nb6 12.Be2 (12.Bb3 a5 13.ba5 Ra5+=) 12...Qe8 (12...c5 13.dc6 bc6 14.c4=) 13.h5 c5 14.bc5 dc5 15.d6 Bd8 16.Nc3 Be6 17.Bb5 Qf7 18.Ne6 Qe6 19.Ne2 a6 20.Nf4 Qf7 21.Be2 Na4 22.Qb1 Ba5 23.Kf1 b5 24.Qc1 (24.c4!?=) 24...c4 (24...Nb2?! 25.Qb2 c4 26.Rd1=) 25.Be5 (25.Ba3 Bc3 26.Rb1 Be5–/+) 25...Rae8 (25...Nd7!? 26.Bd4 Bb4–/+) 26.Bd4+= Bb4 27.c3 (27.Bf6 Qf6 28.d7 Rd8–+) 27...Bd6 28.Rb1 Rc8 29.h6 Nc5 30.Qd2 (30.Qa3 Rc6 31.Bc5 Bc5–+) 30...Bf4 31.ef4 Rfd8 32.Qe3 Nd5 33.Qg3 Nd3 34.Rh4 (34.Be5 e3! 35.Bd3 cd3 36.fe3 Nc3 37.Bc3 Rc3–+) 34...N5f4 35.Bd3 Nd3 (worse is 35...ed3 36.Qf4 Qg6 37.a4+/–) 36.f3 Rd4! 37.cd4 Kh8 (37...Kh8 38.fe4 c3–+ (38...fe4?! 39.Kg1–/+)) 0–1. Schulz,Hans_Juergen (1955) – Bonetti,Shane (2110), TT–15 ETC, 2005.

6.c4 Be7

7.Ne2 a5 8.a3 Bd7 9.Nf4 0–0=.

7.Nh3 a5 8.b5 0–0 9.Be2 Nbd7=.

7.Nh3 Nbd7 8.a4 (8.Nf4 Ne5= 9.Be2 a5 10.b5 g5=; 8.Be2 Ne5 9.0–0 0–0 10.Nf4 a5=) 8...a6 (8...Ne5 9.a5 (9.Nf4= g5 10.Nh5 a5=) 9...Nfg4 10.Be2 0–0=; 8...0–0 9.Nf4 Ne5 10.Be2 a5=) 9.a5 (9.Nf4 Ne5 10.Be2 a5=) 9...Ne5 (9...0–0 10.Nf4 Ne5+=) 10.Nf4 (10.Be2 0–0+=) 10...Ng6 (10...g5=) 11.Nh5 (11.Ng6!? hg6 12.Be2+=) 11...0–0= 12.Be2 Bd7 13.0–0 Be8 (13...Nh5 14.Bh5 Bf6 15.Bd4=) 14.Nd2 (14.Ng3 Bd7+=) 14...Ne5 (14...Nh5 15.Bh5 Bf6 16.Bf6 Qf6 17.Bg6 Bg6 18.Qb3=) 15.Nf4+= Bf7 16.Rc1 (16.Nb3 c6+/–) 16...Nfd7 (16...c6 17.f3+=) 17.Bh5 (17.Nb3 Bf6 18.Nd4 Re8+/–) 17...g6 18.Be2 Bf6 19.Qc2 Qe8 20.Rfe1 (20.Nb3 g5 21.Ne6 Be6 22.de6 Nb8=) 20...Bg7 21.Rb1 Qe7 22.Qd1 (22.Bd4 g5 23.Nh3 c6 24.dc6 bc6+=) 22...Rfc8 23.Nb3 Qh4 (23...c5 24.bc5 Nc5 25.Nd4+=) 24.g3 (24.Nd4 Nf8+=) 24...Qe7= 25.Nd4 ½–½. Kucharkowski,Jens – Wolff,P (2595), Freital, 1981.

7.Nh3 0–0

8.Be2 c5 9.a3 a5=.

8.Nf4 a5 9.a3=.

8.Nf4 a5 9.b5 g5=.

8.Nf4 Na6 9.a3 c5 10.b5 Nc7 11.Nc3 g5 (11...Re8 12.Be2+=) 12.Nh5 (12.Nfe2 a6=) 12...Nh5 (12...a6 13.Ng3+=) 13.Qh5 Bf6 14.g3 (14.Be2 a6 15.a4 ab5=) 14...Bd7 (14...a6 15.a4+=) 15.Qe2 (15.Bg2 a6 16.ba6 b5+=) 15...Qe8 (15...a6 16.ba6 Ra6 17.Bg2+=) 16.g4 (16.Bg2!?=) 16...fg4+= 17.Bg2 Bf5 18.h3 Qh5 (better is 18...gh3!? 19.Bh3 Bh3 20.Rh3 Qd7+=) 19.hg4 (19.Rb1 Bc3 20.Bc3 Rfe8+=) 19...Qg4 20.Qg4 Bg4 21.Be4 Rae8 (21...Rf7!?+=) 22.Bh7+/– Kg7 (22...Kf7 23.Rg1 Bh5 24.Bf5+/–) 23.Rg1 (23.Bd3 Rh8 24.Rh8 Rh8+/–) 23...Bf3 24.Bd3 Rh8 (24...Kh6 25.Be2+/–) 25.Be2 Be2 26.Ke2 Rh2 27.Raf1 (27.Rab1 Kg6+/–) 27...Kg6 (27...a6 28.a4+/–) 28.Nd1 (28.Ba1 a6 29.ba6 ba6+–) 28...Bb2+/– 29.Nb2 Rf8 (29...Kf5!?+/–) 30.Nd3+– Kh5 (30...a6 31.ba6 ba6 32.Rg3+–) 31.Ne1 (better is 31.Rg3+–) 31...Ne8? (better is 31...Rh4 32.f4 Rh2 33.Rg2 Rg2 34.Ng2 Kg4+–) 32.Nf3 Rf3 33.Kf3 Nf6 (33...Rh4 34.Rh1 Nf6 35.Rfg1+–) 34.Rh1 Rh1 (34...Rh4 35.Rfg1 Nd7 36.Ke2+–) 35.Rh1 Kg6 36.Rh8 (36.Rh8 Nd7 37.Re8 Ne5 38.Re5 de5 39.Ke4+–) 1–0. Viedge – Bogoljubow,Efim, Heidelberg simultan, 1932.

8.Nf4 c5 9.a3=.

8.Nf4 Qe8 9.Be2+= Bd7 (9...a5 10.b5+=) 10.Nd2 g5 11.Nh5 Qg6 (11...Na6 12.Bc3+=) 12.0–0 (12.h4 g4 13.Nf4 Qf7+=) 12...Be8 (12...Nh5 13.Bh5 Qh6 14.Be2+=) 13.Ng3 Nbd7 14.f3 f4 (14...a5!?+/–) 15.ef4+– (worse is 15.Nge4 fe3 16.Bd3 Ne5+=) 15...gf4 16.Nge4 Ne5 17.Qc2 Bd7 18.Nf6 (18.Bd3 Nd3 19.Qd3 a5+/–) 18...Qf6 (18...Bf6 19.Ne4+/–) 19.Bd3 Qg7 20.Kh1 Rf6 (20...Bf6 21.Ne4+–) 21.Rfe1 Rh6 22.Nf1 (22.Re2 Qf7+–) 22...Bh4 (22...Bf6 23.Qd2+/–) 23.Re2+– Bg3 (23...Bf6 24.Rb1+–) 24.h3 (24.Ng3 Qg3 25.Bh7 Kh8–/+) 24...Rf8 (24...Re8 25.Bd4+–) 25.c5 (25.Bd4 Re8+–) 25...Bh4 26.c6 (26.Bd4 Bf6 27.Be5 Be5+/–) 26...bc6+/– 27.dc6 Bc6 28.Rc1 Bd5 29.Bc4! Bc4 (29...Nc4 30.Bg7) 30.Be5 de5 31.Qc4 Rf7 32.Qb3 Kf8 33.Rc5 Re7 34.Qc4 Rd6 (34...Rb6!?+/–) 35.Ree5!+– Re5 36.Qf4 Qf6 37.Qe5 Qe5 38.Re5 Bf6 39.Rf5 Kg7 40.Ng3 (40.Ng3 Be7 41.a3+–) 1–0. Pommerel,Wim – Beck,Christian, corr, 1996.

8.Nf4 g5 9.Ne2 Nbd7 (9...a5=) 10.Nd4 Ne5 11.Be2 Qe8 12.Nd2 Qg6 13.Qb3 a5 14.ba5 f4 15.c5 Ra5 16.c6 (16.Nb5 Ned7 17.c6+=) 16...b6 (16...fe3 17.fe3 bc6= (17...Nd5 18.Nc4 Rc5 19.cb7 Bb7 20.Qb7 Nd3 21.Kd2+–)) 17.Nb5+/– fe3 (17...Qf7 18.Be5 de5 19.Bc4+/–) 18.fe3 Bg4 (18...Bd8 19.Be5 de5 20.d6 Kg7 21.Nc7 Bc7 22.dc7+/–) 19.Be5+– Be2 20.Ke2 Qh5 21.Ke1 Rb5 22.Qb5 de5 23.a3 (23.Qb3 Kg7 24.Rd1 Qf7+/–) 23...Bc5 (23...Qf7 24.d6 Bd6 25.Rf1+/–) 24.Qe2 (24.Qb3 Kg7+/–) 24...Qh6 (24...Qf7!?+=) 25.Nb3+– Be7 26.Qc4 Kh8 27.Rd1 (27.Ra2 Rd8 28.Rd2 g4+/–) 27...Ba3 (27...Ng4 28.Rb1+/–) 28.Kd2 g4 29.Rhe1 (better is 29.Ke2!?+/–) 29...Qh2= 30.Re2 Rd8 31.Kc2 Qh6 32.Kb1 g3 33.Na1 (33.Ra2 Qf8=) 33...Be7 34.Red2 (34.Nc2 Kg7+=) 34...Ng4 (34...Qe3!? 35.Nc2 Qc5–/+) 35.Qe4+= Nf2 (35...Qg5 36.Rf1 Nf6 37.Qf5 Qe3 38.Rd3+=) 36.Qe5= Bf6 37.Qf4 (37.Qc7 Qe3 38.Rd3 Nd3–+; 37.Qg3?! Ne4 38.Qf3 Qg6=) 37...Qg7 38.Nc2 Rf8 39.Nd4 Be5 40.Qh4 Qg6 41.Nc2 Ra8 42.Kc1 Nd1 43.Rd1 (worse is 43.Kd1 Bc3–/+) 43...Rf8 44.Qe7 (44.Nb4 Bc3=) 44...Bd6+= 45.Qe6 Rf6 46.Qc8 Kg7 47.Nd4 h5 48.Kb2 (48.Ne6 Re6 49.Qe6 Ba3 50.Kd2 Bb4 51.Kc1 Ba3 52.Kd2 Bb4 53.Kc1 Ba3=) 48...Kh7 (48...Rf2 49.Ka1+=) 49.Rh1 (49.Nf3 Kg7 50.Qd7 Rf7=) 49...Be5 50.Kc3 Kg7 (50...Rf2 51.e4 Rf4 52.Qd7 Kh6 53.Re1–+) 51.Rh4 (51.Kc4 Rf2 52.Qd7 Kh6–/+) 51...Rf3 (51...Rf2 52.Qd7 Kh6 53.Qe6+=) 52.Qd7 (52.gf3 g2 53.Qd7 Kg8 54.Qd8 Kf7 55.Rh5 Qh5–+) 52...Kh6+= 53.Kc4 b5 54.Kb5 Qb1 55.Kc4 Qf1 56.Kb4 Bd6 57.Qd6 cd6 58.Nf3 Qg2 59.Rc4 Qb2 (worse is 59...Qf3 60.c7 g2 61.c8Q+/–) 60.Ka4 Qa2 ½–½. Benussi,Alberto (2225) – Bonetti,Shane (2110), Orangutan Cup Final, 2005.

4.Be2 Nf6

5.b5 Be7 6.d3 0–0 7.Nf3 (7.d4 e4 8.d5 a6 9.a4 ab5 10.ab5 Ra1=; 7.a4 Qe8 (7...a6 8.Nf3 Nbd7 9.0–0 ab5 10.ab5 Ra1=; 7...Be6 8.Nf3 Qe8 9.0–0 Qg6 10.c4 a6=; 7...c5 8.Nf3 e4 9.Nfd2 d5 10.c4 a6=; 7...c6 8.d4 Qa5 9.Qd2 Qd2 10.Nd2 ed4=; 7...Qd7 8.d4 e4 9.Nh3 d5 10.Ba3 a6=) 8.Nf3 Qg6 9.0–0 Be6 10.c4 a6=) 7...a6 (7...e4 8.Nfd2 Be6 9.Nc3 d5 10.0–0 Bd6+=) 8.a4 c6 (8...ab5 9.ab5 Ra1 10.Ba1 c6=) 9.c4 Kh8 (9...ab5 10.ab5 Ra1 11.Ba1 cb5 12.cb5=) 10.0–0 (10.Nc3 e4=) 10...ab5 11.ab5 Ra1 12.Ba1 Be6 (12...cb5 13.cb5 Nd5 14.Nc3=) 13.Nbd2 (13.Nc3 Nfd7=) 13...Nbd7 14.bc6 bc6 15.Qc2 Ng4 16.Qb2 (16.Bc3 Qc7=) 16...Bf6 17.Qa3 c5 18.Qa6 Nb8 19.Qa3 Nc6 20.Qa6 (20.Bc3 Rf7=) 20...Nb4+= 21.Qa4 Qa8 22.Qb3 Qe8 (22...d5 23.Bc3 dc4 24.dc4=) 23.h3= Nh6 24.Bc3 Nc6 (24...Qg6 25.Kh2+=) 25.Qb6 Bd8 26.Qb7 Bf6 27.Rb1 Bc8 (27...Rf7 28.Qb6=) 28.Qb5 (28.Qc7 Nf7+=) 28...Bd7 29.Qb7 (29.Qb2 Qe6=) 29...Nf7 (29...e4 30.Bf6 ef3 31.Bg7 Kg7 32.Bf3+=) 30.Ra1 (30.Qb3 Qe6=) 30...Nfd8 (30...e4 31.Bf6 ef3 32.Qb2 gf6 33.Qf6 Kg8 34.Nf3+=) 31.Qb6= Qg6 (31...Ne6 32.Ra6=) 32.Qc7 e4 33.Bf6 (better is 33.Qd6!? Qe8 34.Bf6 Rf6 35.Qc5=) 33...Qf6 (33...ef3 34.Bf3 Qf6 35.Ra6–/+) 34.Ra8 (34.Ra6!? ef3 35.Bf3–/+) 34...ef3–+ 35.Bf3 Ne5 36.Bd5 Bc6 37.d4? (better is 37.Bc6 Nec6 38.Nf3–+) 37...Ba8 38.de5 de5 (better is 38...Qe5 39.Ba8 Qa1 40.Nf1 Qa8 41.Qd6 Nb7–+) 39.Ba8 Ne6 40.Qa5 (40.Qa7 f4 41.e4 f3 42.Nf3 Nf4–+) 40...Qd8 41.Qd8 Rd8 (41...Nd8?! 42.Bd5–/+) 42.Bd5 Nc7 43.Nf3 (43.e4 fe4 44.Ne4 Nd5 45.cd5 Rd5–+) 43...Nd5 44.Ne5 Re8 45.Nf7 Kg8 46.Nd6 Re6 47.Nf5 (47.Nb7 Nb6–+) 47...Nb6 48.Ng3 (48.Kf1 Kf7–+) 48...Nc4 49.Ne2 Na3 (49...Ne5 50.Nc3–+) 50.Nc3 c4 51.Kf1 Rb6 52.Ke2 (52.Ne4 Rb3 53.Nd2 Rc3–+) 52...Rb2 53.Kf3 (53.Ke1 Nc2 54.Kf1 Nb4–+) 53...Nb5 (53...Nb5 54.Ne2 c3–+) 0–1. Mauron,Regis (1630) – Lombart,Philippe (2130), Quatrieme tournoi de Noel, 2001.

5.b5 Be7 6.d3 a6 7.a4 Be6 (7...ab5 8.ab5 Ra1 9.Ba1 0–0 10.Nf3 c6=; 7...0–0 8.Nf3 Bd7 9.Nc3 c6 10.0–0 Qc7=; 7...c6 8.d4 e4 9.Nh3 d5 10.Nf4 Bd6=; 7...Bd7 8.d4 e4 9.Nh3 ab5 10.ab5 Ra1=) 8.Nf3 0–0 9.Nc3 Nfd7 10.0–0 d5 +=.

5.c4 a5 6.a3 Be6 7.Nf3 Be7 (7...ab4 8.ab4 Ra1 9.Ba1=) 8.d4 e4 9.Ng5 Bg8 (9...Bd7 10.0–0=) 10.d5+= Nbd7 11.h4 (11.0–0 ab4 12.ab4 Ra1 13.Ba1 c6+=) 11...Ne5 12.g4 (12.0–0 b5 13.cb5 Nd5 14.ba5 Bg5 15.hg5 Qg5=) 12...Neg4 (12...Nfg4!? 13.Rg1 Bf6–/+) 13.Bg4= fg4 (worse is 13...Ng4 14.Bg7 Bf6 15.Bh8 Bh8 16.Ra2+/–) 14.Qc2 (14.Nc3!?=) 14...b5!–/+ 15.cb5 Bd5 16.Nc3 Can e4 get defended? 16...Bb7 17.Nce4 Ne4 18.Ne4 0–0 (18...ab4 19.Bg7 Rg8–/+) 19.ba5= Bh4 20.a6 Rf2 21.Nf2 Bh1 22.0–0–0 (better is 22.Kd2!? Bf3 23.Ng4+=) 22...Bf3–/+ 23.Rg1 (23.Ng4 Bd1 24.Kd1–+) 23...Qg5 (better is 23...Bf2!? 24.Qf2 Qg5–+) 24.Ng4–/+ Kh8 (24...Qb5 25.Qc7 Qc6 26.Qc6 Bc6 27.Nh6 Kf8 28.Rg7+/–) 25.Qc7 Rg8 26.b6? (26.Bd4 Bg4 27.a7+=) 26...h5?? (better is 26...Bg4 27.Bd4 Bf2 28.Rg4 Be3 (28...Qg4? 29.b7+–) 29.Be3 Qe3 30.Kb1 Qd3 31.Qc2 Qa6–/+) 27.b7= hg4 (27...Bg4 28.Bg7 Qg7 29.Qg7 Kg7 30.a7+–) 28.Bg7 Qg7 29.Qg7 Kg7 30.Rg4 Bg4 31.a7 Bf3 32.b8Q Bg3 33.Kd2 Be5 34.Kd3 Ba8 35.a4 (35.Qc7 Kf6=) 35...Kf7 36.Qc7 Ke6 37.Qh7 Rd8 38.Qc7 (38.Kc4 Rh8 39.Qg6 Kd7=) 38...Rh8 39.a5 d5 (39...Be4 40.Kd2+=) 40.Qb6= Kd7 41.Qg6 Rf8 42.Qh7 Kc6 43.Qg6 Kd7 44.Qh7 Ke6 45.Qh6 Ke7 46.Qh7 Kd8 47.Qh6 (47.a6 Bc7=) 47...Re8= 48.Qb6 Kd7 49.Qb5 Bc6 50.Qb6 Bd6 51.a6 Ra8 52.Kd4 Bc7 53.Qc5 Attacks the isolani on d5 (53.Qb1 Ra7 54.Qf5 Ke7 55.Qg5 Kf7 56.Qf5 Kg7=) 53...Re8+= 54.Kd3 Be5 55.Qb6 Rc8 56.Kd2 ½–½. Larsen,Andreas – Romsdal,Trond (2145), Rallarsjakken, 2005.

5.c4 c6 6.Nf3 Be6 7.Ng5 Qe7 8.Bh5 (8.0–0 Bg8+=) 8...g6 9.Ne6 Qe6 10.Be2 d5 11.cd5 cd5 12.Qa4 Nbd7 13.0–0 Bd6 14.Nc3 0–0 15.Nb5 a6 16.Nd6 Qd6 17.Qb3 Kg7 18.f4 b5 (18...e4 19.Bd4+=) 19.fe5 Ne5 20.Rac1 (20.Bd4 Rfc8+/–) 20...Rac8 (20...Nc4 21.Bc3+=) 21.Rc5 Rc5 (21...Nc4 22.Bf6 Kf6 23.Bc4 Rc5 24.Qc3 d4 25.bc5 Qc5 26.Qa5 Qc4 27.Qa6 Kg7 28.Rb1=) 22.bc5 Qc7 23.Be5 (23.Bd4!?+/–) 23...Qe5+= 24.d4 (24.a4 d4 25.ab5 ab5=) 24...Qc7 (24...Qe6 25.Kh1=) 25.a4+= ba4 26.Qa4 a5 27.Rb1 Rf7 28.Rb6 Qe7 (better is 28...f4 29.Qa3 Re7=) 29.Kf2?? (better is 29.Rb3+=) 29...Ne4–+ 30.Kg1 Nc3 31.Qb5 (31.Qa1 Qe3 32.Kh1 Ne2 33.Qf1–+) 31...Qe3 32.Kf1 Nb5 0–1. GuestGQRD – GuestHPBH, freechess.org, 2017.

5.c4 Be7 6.d3 Be6 (6...0–0 7.a3 (7.Nf3+= e4 8.Ng5 d5 9.Qb3 h6 10.de4=; 7.Qd2 a5 8.b5 c6 9.Nf3 e4 10.Nd4=; 7.Nd2 Na6 8.a3 Qe8 9.Ngf3 Qg6 10.0–0=; 7.Qc2 Bd7 8.a3 a5 9.b5 Be6 10.Nf3=) 7...a5 8.b5 Nbd7 9.Nf3 c6 10.0–0=) 7.Qc2 (7.Nf3 0–0= (7...a5 8.b5 0–0 9.0–0 a4 10.a3=) 8.0–0 Ng4 9.h3 Nh6 10.Nc3=) 7...0–0 (7...a5 8.b5= 0–0 9.Nf3 c6 10.Nc3=) 8.Nd2 (8.Nf3 Qe8 (8...a6= 9.0–0 Qe8 10.d4=) 9.0–0 Qg6 10.Nc3=) 8...Nbd7 (8...Na6 9.a3= Qe8 10.Ngf3=; 8...a5 9.b5 c6 10.bc6=) 9.Ngf3= h6 (9...Ng4 10.h3=) 10.0–0 Qe8 11.g3 (11.a3 Nb6=) 11...g5 (11...a5 12.a3=) 12.Ne1= h5 (12...d5 13.a3 c5 14.bc5 Bc5 15.d4 ed4 16.ed4=) 13.Ndf3 (13.d4 c6+=) 13...Nh7 14.Ng2 h4 (14...a5 15.a3=) 15.gh4+= g4 16.Nd2 Qh5 17.f4 Bh4 18.e4 (18.fe5 de5 19.d4+=) 18...Rf6 (18...a5 19.fe5 de5 20.d4 fe4 A) worse is 21.Qe4 A1) 21...ab4 22.Nh4 Ng5 23.Qg6 Qg6 24.Ng6 Nh3 25.Kh1 Rf1 26.Bf1+– (26.Nf1?! ed4 27.Bd4 c5+=; 26.Rf1?! Ra2 27.d5 Bf7=); A2) 21...Ng5 22.Qb7 Nh3 23.Kh1 Bg3–+; B) 21.Ne4?! ed4 22.Qd2 Qe5=; C) 21.Nh4 Qh4 C1) 22.de5 g3 (22...ab4?! 23.Ne4 Ng5 24.Nf6 Kg7 25.Kh1=) 23.Rf8 Rf8–+ (23...Kf8?! 24.Nf1 gh2 25.Nh2–+; 23...Nhf8?! 24.h3–/+; 23...Ndf8?! 24.Nf1 gh2 25.Nh2–/+); C2) 22.Qe4 Ng5 23.Qg6 Kh8 24.de5 Rf1 25.Nf1 Rg8+=; C3) 22.Ne4 ab4 23.de5=) 19.Nh4 (19.fe5 de5 20.d4+/– (20.Nh4?! Qh4 21.ef5 Bf5=)) 19...Qh4= 20.fe5 Rh6 21.Rf2 Ng5 22.Rg2 Nh3 (22...de5?! 23.ef5 Nh3 24.Kh1 Bf5 25.Nf3=; 22...Ne5?! 23.ef5 Bf5 24.Rf1=) 23.Kf1? (better is 23.Kh1 Nf4 24.Nf3–/+) 23...Nf4–+ (23...de5 24.Nf3 Qf6 25.ef5 Bf5 26.Qc3–/+; 23...Ne5?! 24.Rg3–/+) 24.Nf3? (24.Rg1 Ne2 25.Ke2 Qh2 26.Kf1 fe4 27.Bd4 Rf8 28.Ke1–+) 24...Ng2 (24...Ng2 25.Nh4 Ne3 26.Kg1 Nc2 27.ef5 Ne5 28.fe6 Rh4–+) 0–1. Christensen,Oddbjorn – Einarsen,Kenneth, Tonsberg, 2004.

5.c4 Be7 6.Nf3 e4 7.Nd4 c5=.

5.c4 Be7 6.Bh5 Nh5+= 7.Qh5 g6 8.Qd1 (8.Qe2 Bf6+=) 8...Bf6 (8...0–0 9.Nc3+=) 9.Nf3 (9.d4 ed4 10.ed4 0–0+=) 9...0–0 (9...e4 10.Bf6 Qf6 11.Nd4–/+) 10.Qc2 (10.d3 e4 11.Bf6 Qf6–/+ (worse is 11...Rf6 12.de4 fe4 13.Qd5 Kg7 14.Qe4+/–)) 10...Be6 (10...e4 11.Bf6 Qf6 12.Nd4–/+) 11.0–0 (11.d3 c6+=) 11...Nd7 (11...Nc6 12.b5 e4 13.bc6 ef3 14.cb7 fg2 15.Kg2+=) 12.d3 (12.d4 c6+=) 12...c5 (12...c6 13.Nc3=) 13.b5 (13.bc5 Nc5 14.d4 Nd7=) 13...e4 14.de4 (14.Bf6 Qf6 15.de4 Qa1+=) 14...fe4 (14...Bb2!? 15.Qb2 Bc4–/+ (15...fe4?! 16.Nfd2=)) 15.Qe4 (better is 15.Bf6 Nf6 16.Nfd2=) 15...Re8 (better is 15...Bb2 16.Qe6 Kg7+=) 16.Bf6+/– Qf6 (16...Nf6 17.Qc2+/– (17.Qb7?! Rb8 18.Qa6 Bc4=)) 17.Nbd2 Nb6 18.Qb7 (18.Qc2 a6+/–) 18...Nc4 (18...Bc8 19.Qc6 Qe7 20.Qe4 Qe4 21.Ne4 Re4 22.Nd2–/+) 19.a4 (19.Rfd1 Reb8 20.Qc6 Rc8+/–) 19...Reb8 (19...Qg7 20.Qg7 Kg7 21.Rfd1 Nd2 22.Rd2+/–) 20.Qc6 Rc8 21.Qb7 Nd2 (21...Rcb8 22.Qe4 Nd2 23.Nd2 d5+/–) 22.Nd2+/– c4 (22...d5 23.Rac1 Qf7 24.Qa6+/–) 23.Ne4 Qe5 (23...Qd8 24.Rad1 d5 25.Nc3+/–) 24.f4+– Qb2 (24...Qg7 25.Qg7 (worse is 25.Nd6 Qb7 26.Nb7 Bd5+/–) 25...Kg7 26.Nd6+–) 25.Rfb1 (better is 25.Nd6 Rd8 26.Qe4+–) 25...Qe2?? (better is 25...Qg7 26.Qg7 Kg7 27.Nd6 Rd8+–) 26.Nf6 (26.Ng5!? Qg4 27.e4 Qh4 28.Ne6 Qf6+–) 26...Kf8 27.Re1 (27.Nh7 Ke8+–) 27...Qb2 28.Nh7 Kg8 (28...Ke8 29.Rad1 Rab8 30.Qa7+–) 29.Qe7 (better is 29.Ng5 Qf6 30.Rad1+–) 29...Bd5 (29...Bf7+–) 30.Nf6 Qf6 31.Qf6 Rc7 (31...Bf7 32.Qd6 Rd8 33.Qf6+–) 32.Qg6 (better is 32.Qd6 Rac8 33.Qd5 Kf8+–) 32...Kh8 33.g3 (better is 33.Qd6 Rac8 34.Qd5 c3+–) 33...Rh7 34.Qf6 (better is 34.Qd6 Bf7+–) 34...Kg8 35.Qd6 (better is 35.Qg5 Kf8 36.Qd5 Rd8+–) 35...Bf3 36.Qe6 (36.e4 Rh8+–) 36...Kh8 37.Qf6 (37.Rac1 Rf8+–) 37...Kg8 38.e4 Rf8 39.Qe6 Kh8 40.e5 (better is 40.Qc4 Rg7 41.f5+–) 40...Rd8 41.Qf6 Rg7 42.e6 (better is 42.Qd8 Kh7+–) 42...Rd2 43.Qh6 Rh7 44.Qf6 (44.Qf8) 44...Kg8?? The backward pawn on h2 becomes a target (44...Rg7 45.e7 Rg2 46.Kf1 Be2 47.Re2 Rg1 48.Kg1 Kh7 49.Qh4 Kg6 50.Qg5 Kh7 51.Qh5 Kg8 52.e8Q) 45.Qg6 (45.e7 Rg2 46.Kf1 Be2 47.Re2 Rf2 48.Kf2 Rh2 49.Ke3 Re2 50.Ke2 c3 51.e8Q Kh7 52.Rh1) 45...Rg7 46.Qh6 (46.e7 Rg2 47.Kf1 Rf2 48.Kf2 Rg6 49.e8Q Kh7 50.Kf3 Rd6 51.Qh5 Kg8 52.Re8 Kg7 53.Re7 Kf6 54.Qf7) 46...Rh7 47.Qg6 (47.e7 Re7 48.Re7 Rg2 49.Kf1 Be2 50.Kg2 Bf3 51.Kf3 c3 52.Qg7) 47...Rg7+– 48.Qh6 Rh7 49.Qg6 (49.e7 Re7 50.Re7 Rg2 51.Kf1 Be2 52.Kg2 Bf3 53.Kf3 c3 54.Qg7) 49...Rg7 50.Qh6 1–0. GuestLLPH – GuestTDWS, freechess.org, 2016.

5.c4 g6 6.Nc3 Be6 7.d4 ed4 8.ed4 d5 9.c5 Bg7 10.Nf3 0–0 11.0–0 Ne4 12.Qb3 c6 13.a4 b6 14.Ne4 fe4 15.Nd2 Qg5 (better is 15...Qe7!?=) 16.Ne4!+/– Qf4 (16...de4 17.Qe6 Double attack (17.Qe6 Pinning; 17.Qe6 Deflection; 17.Qe6 Decoy)) 17.Bf3 Bf5 (17...Na6!?+/–) 18.Bc1 Qc7 19.Be3 (19.Nd6 Na6 20.Qc3 bc5 21.bc5 Rab8+–) 19...Be4 20.Be4 Kh8 21.Bf3 bc5 22.bc5 Nd7 23.Rab1 Rab8 24.Qa2 Nf6 25.a5 Ng8 26.a6 Ne7 27.Rb8 Rb8 28.Rb1 (better is 28.Bg4!?+–) 28...Nf5+= 29.Rd1 h5 (29...Rb4!?+=) 30.Qd2+/– Qc8 31.Qd3 Rb4 32.Qc3 (32.Be2 Qb8+/–) 32...Rc4+= 33.Qb2 (33.Qa3 Nd4 34.Bd4 Rd4 35.Rd4 Bd4+=) 33...Rc5 (better is 33...Qe8!?=) 34.Be2+/– Qe8 (34...Ra5+/–) 35.Qa3 (35.Qd2 Ne3 36.fe3+– (worse is 36.dc5 Nd1 37.Bd1 Qe5+=; worse is 36.Qe3 Qe3 37.fe3 Ra5+=)) 35...Rc2= 36.Qd3 Rb2 (36...Qe4 37.Kf1+=) 37.h3 (better is 37.Bh5 Qf7 38.Bf3+/–) 37...Ne3+= 38.fe3 Bh6 39.Kh1 (39.Kf2 Qf7 40.Ke1 Qe6+=) 39...Qe4 (39...Qe3!? 40.Bf1 Qd3 41.Bd3 Kg7–+) 40.Qe4 (40.Bf3 Qd3 41.Rd3 h4+=) 40...de4–/+ 41.Bc4 Rb4 42.Be6 Ra4 43.Bc8 (43.d5 cd5 (43...Be3 44.dc6 Bf4 45.Bb3 Ra6 46.Rf1–/+) 44.Bd5 Be3–/+) 43...Be3 44.d5 (44.Bb7!? Rd4 45.Rd4 Bd4 46.Bc6–/+) 44...cd5–+ 45.Rd5 Ra1 46.Kh2 Bf4 47.g3 Ra2 48.Kg1 (48.Kh1 Bg3 49.Rd8 Kg7–+) 48...Be3 (better is 48...Bg3!? 49.Rd8 Kg7 50.Rg8 Kh6–+ (50...Kg8?! 51.Be6 Kg7 52.Ba2–+)) 49.Kf1 Bb6 50.Re5 e3 51.Re8 (51.Bb7 Kg7–+) 51...Kg7 52.Re7 (52.Re5–+) 52...Kh6 53.g4 (53.Re5 Bd4 54.Re6 Rf2 55.Ke1 Bc3 56.Kd1 Rd2 57.Ke1 Rd8 58.Ke2 Rc8 59.Ke3 Ba5–+) 53...hg4 (53...Rf2 54.Ke1 Ba5 55.Kd1 Rd2 56.Kc1–+) 54.hg4 (54.Bg4 Ra6 55.Be2–+) 54...Rf2 55.Ke1 Ba5 56.Kd1 Rd2 57.Kc1 e2 58.Re2 (58.Bd7 Bb4 59.Re5 Rd1 60.Kc2 e1Q 61.Re1 Re1–+ (61...Be1?! 62.Kd1 Bc3 63.Kc2=; 61...Rd7 62.Re5–+)) 58...Re2 59.Kd1 Ra2 60.Bb7 Kg5 61.Bc8 Bb6 62.Ke1 (62.Kc1 Ra5 63.Kb2 Rc5–+) 62...Kf4 63.Kd1 g5 (63...Be3!? 64.Ke1–+) 64.Kc1 Rg2 65.Kd1 (65.Kb1 Rd2–+) 65...Rg4 0–1. Tan,Kwang Shing Bryan – Clanchy,Nicholas, Wch U12 Vung Tau, 2008.

5.Nf3 (--> 4.Nf3 Nf6 5.Be2).

5.Bh5 g6 6.Be2 Be6 7.Bb5 (7.d4 ed4 8.Bd4 Nc6=+) 7...c6 8.Be2 Nbd7 9.a4 d5 (9...Bg7!?–/+) 10.Nf3= Qc7 11.Ng5 Qd6 12.Ne6 Qe6 13.0–0 (13.b5!?=) 13...Bb4–/+ 14.d3 0–0 15.c4 d4 16.ed4 ed4 17.Bd4 Rae8 18.Bf3 Qd6 19.Ba7 b6 20.a5 ba5 21.d4 Ra8 22.c5 Qf4 23.Bb6 Nb6 24.cb6 Ra6 25.Bc6 Rb6 26.Qb3 Kg7 27.g3?? Qd4–+ 28.Qf3 Qf2 29.Rf2+– Rc6 30.Nd2 Rc2 31.Rd1 Rd2?? 32.Rfd2 Bd2 33.Rd2 Ne4 34.Rd7 (34...Kf6 35.Qd3+–) 1–0. TIROLOCO – loop, Live Game Caissa's Web, 2004.

4.Nf3 e4

5.Nd4 b5? 6.Bb5+– Bd7?? 7.Ne6 Qe7 8.Nc7 Kd8 9.Nc3 (9.Nc3 Bb5 10.N3b5+– (10.Na8?! Bc6+/–; 10.N7b5?! Nf6+–); 9.Na8?! Bb5 10.Bd4 Qb7+–) 1–0. Wall,Bill – Mykuh, internet, 1999.

5.Nd4 Nf6 6.Be2 a6 7.0–0=.

5.Nd4 Nf6 6.Be2 Bd7 7.c4 Nc6 8.b5 Nb4 (better is 8...Nd4!? 9.Bd4 Be7=) 9.a3+/– Nd3 10.Bd3 ed3 11.Qb3 c5 12.Nf3 Be6 13.Qd3 Ne4 14.Nc3 Qf6 15.0–0 (15.Ne4?! Qb2 16.0–0 fe4 17.Qe4 Qf6 18.Qb7 Rd8=) 15...Qg6 16.Nh4 Qg4 17.Nf3?? (17.f3 Qh4 18.fe4 fe4 19.Ne4 0–0–0+–) 17...0–0–0?? (better is 17...Nc3 18.Qc3 Bc4=) 18.h3 Qh5 19.Nd5 (19.Ne4 fe4 20.Qe4+–) 19...b6? (better is 19...Rg8!?+/–) 20.Nf4 (20.a4 Rd7+–) 20...Qf7 21.a4?? (better is 21.Ne6 Qe6 22.Qd5 Qd5 23.cd5+–) 21...g5?? (better is 21...Bc4 22.Qc2 Bf1 23.Rf1 Rg8+=) 22.Ne6+– (22.Bh8?! Bc4 23.Ng5 Ng5+–) 22...Qe6 23.Bh8 g4 24.Nd4! Qg6 (24...cd4 25.Bd4 Combination) 25.Nf5! gh3 (25...Qf5 26.hg4 Decoy) 26.Qe4 hg2 (26...d5 27.cd5 Re8 28.Qf3 hg2 29.Rfe1+–) 27.Qc6 (better is 27.Qa8 Kd7 28.Qc6 Ke6 29.Qd5 Kd7+–) 27...Kb8 28.Ng3 (better is 28.Qg2 Qf5 29.a5 d5 30.ab6 ab6+–) 28...gf1Q 29.Kf1 1–0. GuestGQRD – GuestHJKK, freechess.org, 2017.

5.Nd4 Nf6 6.Be2 Nbd7?? 7.0–0 (7.Ne6 Qe7 8.Nc7 Kd8 9.Na8 b6+–) 7...Be7?? (7...Nb6!?+=) 8.Nf5 (better is 8.Ne6+–) 8...Ne5? (better is 8...0–0!?+/–) 9.Ng7+– Kf7 10.Nh5 Nh5 11.Bh5 Kf8 (11...Kg7 12.f4 ef3 13.Qf3+–) 12.f3 Bf6 13.fe4 Rg8 14.Rf2 (better is 14.Be5 de5 15.Qf3+–) 14...Bg4 (14...Kg7 15.Be5 de5 16.Bg4+–) 15.Bg4 (15.Be5 Bh5 16.Bf6+– (16.Rf6?! Qf6 17.Qh5 Qe5 18.Qe5 de5+/–)) 15...Ng4 16.Rf4 Ke8 17.Bf6 (17.Rg4?! Rg4 18.Nc3 Bc3 19.Bc3 Qg5+–) 17...Nf6 18.Qf3 Rf8 (18...Nd7+–) 19.Nc3 Qe7 (19...Kf7 20.Rf1 Kg8 21.Nd5+–) 20.Nd5 (20.Rf1 c6+–) 20...Qg7 (20...Nd5 21.ed5 Rf4 22.ef4 Kf8+–) 21.Nf6 Rf6 (21...Kd8+–) 22.Rf6 Qg2 1–0. GuestBTYG – GuestFVPM, freechess.org, 2017.

4.Nf3 Be6

(--> 3.e3 Be6 4.Nf3 f5).

5.c4 Nf6 6.Be2 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 Be6).

4.Nf3 Nf6

5.a3 Be7 6.Bc4 Nc6 7.0–0 d5 8.b5 dc4 9.bc6 e4 10.Nd4 b6 11.Qe2+= 0–0 12.Nc3 a6 13.Qc4 Kh8 14.a4 Bd6 15.Ba3 Ba3+= 16.Ra3 Qe7 17.Raa1 Ng4 18.h3 Ne5= 19.Qb3 Qf6 20.Nd5+/– Qf7 21.a5 b5 22.Nf4 Qe8 23.Qb4 Nc4 24.Rad1 Nd6 25.d3 g5 26.Nd5+– g4?? 27.Nc7 Qg6 28.Na8 gh3 29.g3 f4 30.ef4 Rf4 31.Qd2 Rg4 32.Nb6 Rg3 33.fg3 Qg3 34.Kh1 e3 35.Qh2 Qg6 36.Nc8 Nc8 37.Qe5 Kg8 38.Qd5 Kg7 39.Nf5 Kh8 40.Qd8 Qg8 41.Qd4 Qg7 42.Qg7# 1–0. pierre – yect, internet, 2010.

5.a4 a5 6.b5 Be6 7.c4 Be7 8.d4 e4 9.d5 Bg8 10.Nd4 Qd7 11.Nc3 Bf7 12.h3 h5 13.Nce2 g5 14.Ng3 Bg6 15.Ne6 c6 16.Ng5 cd5 17.cd5 h4 18.Ne2 Rh5 19.Ne6 Nd5 20.Ng7 Kd8 21.Nh5 Ne3 22.fe3 Bh5 23.Qd5 Qc7 24.Nd4 Qd7 25.Ne6 1–0. phildo (1865) – pho323 (1785), gameknot.com, 2013.

5.b5 (--> 4.b5 Nf6 5.Nf3).

5.Nc3 Nc6 6.b5 Ne7 7.Rb1 g6 8.Bc4 d5 (better is 8...Bg7!?=) 9.Bb3+/– e4 10.Ne4! de4? (10...de4 11.Bf6 Discovered attack; 10...fe4 11.Bf6 Discovered attack; 10...Ne4 11.Bh8 Pinning (11.Bh8 Deflection; 11.Bh8 Clearance)) 11.Bf6 (11.Bf6 ef3 12.Qf3+– (12.Bh8?! fg2 13.Rg1 Qd6+–)) 1–0. Bendig,Frank (2295) – Fetisov,Ilja, IECG, 2009. (=1.Nf3 f5 2.b4 Nf6 3.Bb2 d6 4.e3 e5)

5.Nc3 Be7 6.Bb5 c6 7.Be2 0–0 8.0–0 Kh8 9.a3 Be6 10.Ng5 Bg8 11.f4 e4 12.Qe1 a5 13.Qh4 ab4 14.ab4+= Ra1 15.Ra1 Qb6 16.b5 Nbd7 17.Na4 Qc7= 18.bc6 bc6 19.d3 Rb8 20.de4 fe4 21.Ne4+= d5 22.Ng5 Qa7 23.Bd4 Qb7 24.Bd3 c5 25.Bc3 Bd8 26.Bf5 Ra8+= 27.Qe1 Qb5? 28.Bd7+– Nd7 29.Nc5! Ra1 30.Qa1 Bf6 31.Nd7 Bc3 32.Qc3 Qd7 33.Nf3 1–0. gtate (2790) – jvanmechelen (2475), net–chess.com, 2008.

5.Nc3 Be7+= 6.Be2 0–0 7.0–0 b6 (7...a6 8.a4=) 8.a3 (8.b5 a6=) 8...e4 (8...c6 9.Qb1=) 9.Nd4 c5 10.bc5 bc5 (worse is 10...dc5 11.Bc4 Kh8 12.Ne6 Be6 13.Be6+/–) 11.Nb3 d5 12.d3 Na6 (12...Be6 13.de4 de4 14.Qd8 Rd8 15.Nb5=) 13.Nb5 Be6 14.de4 fe4 15.c4 (15.Rb1 Nc7+=) 15...dc4 16.Nd2 Rb8 17.a4 Qd7 (17...Nb4 18.Na7 Rb7 19.Nb5+=) 18.Nc4 Qb7 19.Be5 Rbd8 20.Ncd6 Qc7?? (better is 20...Qb8=) 21.Nc7+– (21.Nc7 Nc7 22.Qc1 Bd6 23.Bd6 Rd6 24.Qc5+–) 1–0. Rego,Sandro – Brugnoli,Paolo, IECG, 1999.

5.Nc3 g6 6.Be2 Bg7 7.0–0 0–0 8.a3 c6 9.Bc4 d5 10.Bb3 Nbd7 11.d3 e4 12.Nd4 Ne5 13.Qe2 Qd6 14.f3 ef3 15.gf3 Re8 16.Qf2 Bd7 (16...a6 17.e4+=) 17.e4 fe4 18.fe4 Nfg4 19.Qh4 Bf6 20.Qh3 Nf7 21.Nce2 Re7 22.c4 (22.c3 Be5 (22...de4 23.de4 Rf8 24.Qg3–/+) 23.Qh4 g5–/+) 22...dc4 23.Bc4 Rf8 24.Rae1 (24.Rab1 Be5 25.Qh4 Bh2 26.Kh1 Be5=) 24...Be5–/+ Can h2 get defended? 25.Qh4 Bh2 (25...Nh2?! 26.Nc6 bc6 27.Be5 Re5 28.Rf7 (28.Qh2? Rg5 29.Kh1 Rh5 30.Qh5 gh5–+) 28...Rf7 29.Bf7 Kf7 30.Qf4 (30.Qh2 Rg5 31.Kh1 Rh5 32.Rf1 Ke8 33.Qh5 gh5–+; 30.Qh7?! Kf8 31.Qh8 Kf7 32.Qh7 Kf8 33.Qh8 Kf7 34.Qh7=) 30...Kg7 31.Kh2+=) 26.Kh1 Be5 27.Bc3 Ne3 (27...Ne3 28.Rf2 b6–/+) 0–1. Rego,Sandro (1955) – Brugnoli,Paolo (1840), IECG, 1998.

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

5.c4 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7).

5.c4 Be7 6.d4 e4 7.Nfd2 c6 8.Nc3 Be6 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be6 6.d4 e4 7.Nfd2 c6 8.Nc3 Be7).

5.d3 a5 6.b5 g6 (6...c6 7.c4=) 7.c4 Bg7 8.Qc2 (8.Be2 0–0=) 8...b6 (8...e4 9.Nfd2 0–0 10.Nc3=) 9.Be2+= Nbd7 10.Nbd2 Qe7 11.0–0 0–0 12.Rfe1 (12.Ne1 Bb7=) 12...e4 13.de4 (13.Nd4 ed3 14.Bd3 Bb7=) 13...fe4 14.Nd4 Bb7 15.Rad1 Ne5 16.a4 (better is 16.Rf1!?=) 16...Nfg4–/+ 17.Nc6? (17.Ne4 Qh4 18.Bg4 Ng4 19.Nc6 Qh2 20.Kf1 Bb2 21.Ne7 Kf7 22.Nc6 Bc6 23.bc6–+) 17...Qh4–+ (17...Bc6?! 18.Be5 Be5 19.Bg4=) 18.Bg4 Ng4 (18...Qf2 19.Kh1 Ng4 20.Bg7 Kg7 21.h3–+) 19.h3 Nf2 20.Rc1 (20.c5 Nd1 21.Rd1 Bb2 22.Qb2 Bc6 23.Qb3 Kg7 24.Qc3 Kh6 25.bc6 bc5 26.Kh2–+) 20...Nh3! 21.gh3 Qg3 22.Kh1 Rf2 23.Nf1 (23.Ne7 Kf7 24.Bg7 Qg2) 23...Qg2 0–1. Hilbert,Stephan J – Gray,Garvin (2145), FICGS, 2016.

5.d3 Nc6 6.a3 Be7 7.c4 0–0 8.Nbd2 e4 (8...Qd7!?=) 9.de4+= Ne4 10.Bd3 Nd2 11.Qd2 Bf6 12.0–0 Ne5 13.Ne5 de5 14.Rad1 Qe7 15.c5 e4 16.Bc4 Kh8 17.Qc2 Be6 18.Be6 Qe6 19.Rd2 Rad8 20.Rfd1 Bg5 21.g3 (21.c6!? Rd2 22.Rd2 bc6 23.Qc5+=) 21...c6 22.Rd8 Rd8 23.Rd8 Bd8 24.Qd2 Be7 25.Kg2 h6 26.h4 Kh7 27.Qc3 Bf6 28.Qd2 (better is 28.Qc1=) 28...g5?? (better is 28...Qa2 29.Bc3 Qd2 (29...Qa3? 30.Bf6 Qd3 31.Qa2+–) 30.Bd2 g6+=) 29.Bf6+/– Qf6 30.hg5 (30.Qd7 Kg6 31.hg5 Qg7 32.Qg7 Kg7 33.gh6 Kh6+–) 30...hg5 (30...Qf7!? 31.gh6 Kh6 32.Qd6 Kh5+–) 31.Qd7+– Qg7 (31...Kg6 32.Qb7 f4 33.ef4 (33.Qa7 f3 34.Kh2 Qh8 35.Kg1 Qh3 36.Qg7 Kg7 37.b5 Qg2) 33...gf4 34.gf4+– (34.Qa7 f3 35.Kh3 Qh8 36.Kg4 Qe5 37.Qf7 Kf7 38.Kh4 Kg6 39.Kg4 Qg5 40.Kh3 Qh5)) 32.Qf5 Kh6 33.Qe4 Qc3 (33...Qf7+–) 34.Qe6 Kh5 (34...Kg7 35.Qd7 Kf6 36.Qb7+–) 35.Qf7 (35.g4 Kh4 36.Qh6 Kg4 37.Qh3) 35...Kh6+– 36.Qb7 Qa3 (36...Qd3 37.Qc6 Kg7 38.Qb7 Kf6+–) 37.Qc6 Kh5 38.b5 1–0. Fournier,Frederic (1850) – agrurion, Active, 2007.

5.d3 e4 6.de4 fe4 7.Nd4=.

5.d4 e4 6.Nfd2 d5 7.b5 Bd6 8.c4 c6 9.c5 Bc7 10.a4 (10.Qa4 cb5 11.Bb5 Bd7=) 10...0–0 11.Nc3 f4 12.Qb3 fe3 13.fe3 Ng4 14.Nce4 Kh8 15.Ng3 (15.bc6 Nc6 16.Ng3–/+) 15...Ne3 (better is 15...Qh4 16.e4 Ba5 17.bc6 bc6=) 16.Qe3= Re8 17.Nde4 Bg3 18.Qg3 (18.hg3?? Re4 (worse is 18...de4 19.d5 Qc7 20.d6+–) 19.Rh7 Kg8 20.Qe4 de4–+) 18...Re4 19.Kd2 Bg4? (better is 19...Rg4!? 20.Qd6 Qg5 21.Kd1 Rf4=) 20.Bd3+/– Qg5 21.Kc3 Re3 (21...cb5 22.ab5 Re3 23.Qe3 Qe3 24.Rhe1 Qe1 25.Re1+–) 22.Rae1 Rd3 23.Qd3 Nd7 24.Qe3 Qg6 25.Rhf1 Nf6 26.Rf6 (26.Qe7!? b6 27.bc6 bc5 28.dc5+– (28.Qc5?! Bd1 29.Rf2 Rb8+=)) 26...gf6+/– 27.Bc1 (27.Qe7 Rb8+/–) 27...Bd7+= 28.bc6 Bc6 29.Qh6 Ba4 30.Qg6 hg6 31.Re6 Rf8 32.Re7 Bc6 33.Bh6 Re8 34.Bg7 Kg8 35.Bf6 Re7 36.Be7 Kf7 37.Bd6 Kf6 ½–½. Mezgo,Victor – Sandykov,Mihail, Borisoglebsk Bocharov Memorial 8th, 2008.

5.d4 e4 6.Nfd2 d5 7.b5 Bd6 8.Be2 0–0 9.0–0 Be6 10.a4 c6 11.Na3 Qc7 12.g3 Nbd7 13.f4 (13.c4 c5+=) 13...Rfc8 14.Rc1 (14.h3 Nb6 15.a5 Na4–+) 14...a6 (14...Ba3 15.Ba3 cb5 16.ab5–/+) 15.ba6 ba6 Black creates threats along the open b–file 16.c4 Rcb8 17.Nb3? White prepares c5 (better is 17.Qc2+=) 17...Qb7–+ 18.Rc3 Bb4 19.Nc1 Bc3 20.Bc3 Rc8 21.c5 Bf7 22.Qb3 Qb3 23.Nb3 Rab8 (23...Bh5!? 24.Bh5 Nh5–+) 24.Nd2 Rc7 25.a5 (25.Rb1 Rb1 26.Nab1 Nb8–/+) 25...Ra7 (25...Bh5 26.Bh5 Nh5 27.Rb1–+) 26.Rb1 Bh5 27.Bh5 Nh5 28.Kf2 Nhf6 29.h3 Rab7 30.Rb7 Rb7 31.Kg2 h6 32.Kf2 g5 33.Kg2 (33.fg5 hg5 34.h4 Ng4 35.Ke2 Ndf6–+) 33...g4 34.h4 Ne8 35.Kf2 Nc7 36.Ba1 Nb5 37.Nc2 Rb8 (37...Kf7 38.Nb4 Nb8 39.h5–+) 38.Ke2 (38.Nb4 Rc8–+) 38...Nf8 39.Kf2 Ne6 40.Kg2 Nd8 41.Kf2 Nb7 42.Nb3 Nd8?? (42...Nc7 43.Bc3–+) 43.Nd2 Kf7 44.Kg2 Nb7 45.Nb3 Ke6 46.Kf2 Kd7 47.Ke2 Nd8 48.Nd2 Nc7 49.Bc3 Ke6 50.Bb4 Ne8 51.Kf2 Rb5 52.Ke2 Nb7 (52...Nc7 53.h5–+) 53.Nb3 (53.Bc3 Na5 54.Na3 Rb3–+) 53...Nf6 54.Kf2 Kf7 55.Ke2 Kg6 56.Kf2 Nh5 57.Kg2 ½–½. Gernet,Timo – Medwed,Eugen, RLPF–ch U13 Wolfstein, 1994.

5.d4 e4 6.Nfd2 Be7 7.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.d4 e4 7.Nfd2).

5.d4 e4 6.Nfd2 g6 7.c4 Bg7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 g6 6.d4 e4 7.Nfd2 Bg7).

5.Be2 Bd7 6.0–0 Nc6 7.b5 Ne7 8.Nc3 e4 9.Nd4 d5 10.f4 c6 (10...Ng6 11.Nb3=) 11.a4 c5 12.Nb3 d4 (12...Ng6!?=) 13.ed4+/– cd4 14.Nd4 Ned5 (14...Qb6 15.Nb1+/–) 15.Nd5 Nd5 16.Bc4 Be6?? (better is 16...Nb6 17.Bb3 Bc5+–) 17.Ne6+– Qd6 (17...Qb6 18.Nd4 Bc5+–) 18.Bd5 Qd5 (18...Kd7 19.c4 Re8+–) 19.Nc7 (19…Kf7 20.Nd5 Bc5 21.d4+–) 1–0. tromar (1885) – mickk (1745), GameColony.com, 2002.

5.Be2 Be6 6.0–0 Nbd7 7.c4 Be7 8.d4 c6 9.de5 de5 10.Ne5 Qc7 (better is 10...Ne5!? 11.Be5 Bb4 12.Bh5 Ke7+=) 11.Nd7+/– Bd7 12.c5 Rd8 13.Qc2 0–0 14.Bd3 Ng4 15.Bc4 Kh8 16.g3 Bf6 17.Nd2 Bb2 18.Qb2 b6 19.Rab1 Rf6 20.Nf3 Rdf8 21.cb6 ab6 22.Rbd1 c5 23.Be2 Rh6 24.Kg2 Bc6 25.Rh1 Ne5 26.Rd2?? Re8 27.Qb1–/+ Nf3 28.Bf3 Bf3 29.Kg1?? Qc6–+ 30.bc5 Bh1 31.f4 bc5 32.Qf5 Rd6 (33.Qc2 Rde6–+) 0–1. valpa – adamant, playchess.de, 2003.

5.Be2 Be6 6.Nc3 a5 7.b5 a4 8.a3 Nbd7 (8...Ne4 9.0–0=) 9.Ng5+= Bg8 10.0–0 h6 11.Bh5 (better is 11.Nf3!?+=) 11...Ke7+= 12.Nh3 g5 (worse is 12...Nh5 13.Qh5 Be6 14.d4+=) 13.Bg6 g4 (13...Be6!? 14.d4 g4+=) 14.Nf4= ef4 15.ef4 Be6 (better is 15...d5!?+=) 16.Re1+= Nc5 17.Nd5 (better is 17.Bf5!? Kf7 18.Be6 Ne6 19.Nd5 Nd5 20.Bh8 Ndf4 21.Qg4+=) 17...Nd5+= 18.Bh8 Kd7 19.Re6 Ne6 (19...Ke6? 20.Qe2 Ne4 21.Qc4+–) 20.Bf5 Ndf4 21.Qg4 Qg5 22.Qg5 hg5 23.Re1 Re8 24.g3 Nd5 25.d3 c5 26.c4 Ndc7 27.Bc3 Bh6 (27...b6!?=) 28.Ba5+= Na8 29.Bd2 Nac7 30.Ba5 Na8 31.Bd2 Nac7 32.h4 b6 33.hg5 Bg7 34.f4 d5 35.Kg2 Bb2 36.Rb1 Ba3 37.Ra1 Bb2 38.Ra4 dc4 39.dc4 Ke7 40.Ra7 Kf8 41.g4 Re7 42.Kh3 Nd4 43.g6 (43.Ra2!? Bc3 44.Bc3 Re3 45.Kh4 Rc3 46.Ra7=) 43...Nf3+= 44.Ba5 ba5 45.b6 Ne6 46.b7 (46.Be6!? Re6 47.Ra8 Kg7 48.b7=) 46...Nf4= 47.Kg3 Be5 48.Kf3 Bb8 49.Ra5 Rb7 50.Rc5 Rb3 51.Ke4 Ne2 52.Rc8 Kg7 53.c5 Rb4 54.Kd5 Nc3 55.Ke6 Rb2 56.Rd8 (56.Re8 Re2 57.Kd7 Re8 58.Ke8 Na4+–) 56...Re2+/– 57.Kd7 Bg3 58.c6 (better is 58.Kc8+/–) 58...Nd5= 59.Kc8 Ne7 60.Kd7 Nd5 61.Kc8 Ne7 ½–½. Csapo,Zoltan (2100) – Henrichsen,Jens (1935), Budapest FS05 FM–A, 2008.

5.Be2 Be6 6.c4 Be7 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 Be6).

5.Be2 g6 6.c4 Bg7 7.0–0 0–0 8.d3 h6 9.Nbd2 Nc6 10.Qb3 Be6 11.d4 e4 (11...ed4 12.Nd4 Nd4 13.Bd4+=) 12.Nh4 (12.d5 ef3 13.Bf3 Bd7 14.dc6 Bc6+=) 12...Bf7= 13.g3 Qd7 14.Ng2 g5 15.f3 Rae8 16.fe4 Ne4 17.Ne4 Re4 (17...fe4 18.b5 Ne7 19.d5+=) 18.Bf3 (18.Bd3 b5+=) 18...b5 (18...Re7 19.Rac1+=) 19.Be4 (19.d5 bc4 20.dc6 cb3 21.cd7 Bb2 22.Be4 Ba1 23.Bf5+= (worse is 23.Ra1 b2 24.Rb1 fe4–/+)) 19...Bc4?? (19...fe4 20.d5 Ne5 21.Be5 Be5 22.Rad1+/–) 20.Qc3 (better is 20.Bd5 Bd5 21.Qd5 Kh7 22.Qb5+–) 20...fe4= 21.Rf8 Kf8 22.a4 a6 23.ab5 Bb5 24.Qc2 Nb4 25.Qe4 Bc6 (25...d5 26.Qb1 Ke8 27.Ba3=) 26.Rf1 (26.d5 Nd5 27.Bg7 Kg7 28.Ra6 Bb7+=) 26...Kg8= 27.Qg6 (27.Qb1 Qe6=) 27...a5 (27...Qe8 28.Qf5+=) 28.d5 Bd5 (28...Nd5 29.e4 Nb4 30.Bg7 Qg7 31.Qe6 Kh8 32.Rf6 Be4 33.Qe8 Qg8 34.Qe4+–) 29.Bg7 Qg7 0–1. GuestNGXK – GuestXBKT, freechess.org, 2017.

5.Be2 Be7

6.0–0 Be6 7.d4 e4 8.Ng5 Bg8 (8...Bd7 9.d5+=) 9.d5+= Nbd7 10.c4 Ne5 11.f4 ef3 12.Nf3 (12.gf3?! b5 13.Ne6 Be6 14.de6 Nc4 15.Bc4 bc4 16.Qa4 Kf8+=) 12...Nf3 13.Rf3 Qd7 (13...Bf7 14.Rf5 Bg6 15.Rf4+/–) 14.Bd3 g6 15.e4! 0–0–0 (15...fe4 16.Rf6 Pinning (16.Rf6 Deflection); 15...Ne4 16.Bh8 Pinning (16.Bh8 Deflection)) 16.ef5+– Rf8 17.Nc3 g5 18.Qe2 h5 19.Qe3 Kb8 (19...b6 20.Qe2+–) 20.Nb5 b6 21.Nd4 g4 22.Nc6 Kb7 23.Qe7 (23.Ne7?! gf3 24.Ng6 Qg7 25.Qf3 Re8 26.Nh8 Qh8+–) 23...Qe7 24.Ne7 gf3 25.Ng6 (25.Ng6 Bd5 26.Nh8+–; 25.gf3?! Rh7 26.Ng6 Rff7+–) 1–0. themonkey (2030) – Tukker (1835), GameColony.com, 2002.

6.a3 0–0 7.0–0 a5 8.d4 e4 9.Ng5 =.

6.a3 0–0 7.0–0 b6 8.c4 Bb7 9.d3 (9.d4 e4 10.Ng5 Qc8+=) 9...Nbd7 10.Ng5 Re8 11.Bf3 Bf3 12.Qf3 c5 (12...g6!?+=) 13.Qf5+/– Nf8 14.Qf3 h6 (14...cb4 15.ab4 d5 16.b5+/–) 15.Ne4+– Ne6 16.Nf6 Bf6 17.e4 (17.Nc3!? Nc7+–) 17...Bg5+/– 18.Qe2 Nf4 19.Qd1 Rf8 20.Nc3 Qe8 21.g3 Ne6 22.Nd5 Nd4? (better is 22...Qg6+/–) 23.Bd4+– cd4 24.Nc7 Qg6 25.Na8 Ra8 26.Qg4 Rf8 (26...h5 27.Qd7 Qf6+–) 27.h4 1–0. Fournier,Frederic (1620) – Barndy (1755), playchess.com, 2013.

6.a3 0–0 7.0–0 Kh8 8.d3 Be6 (8...a5 9.b5=) 9.Nbd2 (9.c4 Nc6=) 9...Nbd7 (9...a5 10.Ng5 Bd7 11.d4=) 10.Ng5 Bg8 11.c4 h6 12.Ngf3 Qe8 13.Qc2 (13.d4 e4 14.Nh4 Be6+=) 13...Be6 14.Rfd1 Qg6 15.b5 (15.Nh4 Qg5 16.Ndf3 Qh5 17.Ne5 Ng4 18.Bg4 fg4 19.Neg6 Kh7 20.Ne7 Bf7+–) 15...Rae8 (15...a6 16.d4 e4 17.Nh4+=) 16.Ne1 (16.d4 e4 17.Ne1 d5=) 16...f4 (16...c6 17.Qa4=) 17.ef4 ef4 18.Bf3 b6 (18...Nc5 19.Bd4=) 19.Be4 (19.Bc6 d5+=) 19...Ne4= 20.Ne4 (20.de4 Bf6=) 20...Ne5 (20...f3 21.g3+=) 21.Qe2 (better is 21.Be5!? de5 22.Qe2=) 21...f3–/+ 22.Nf3? (better is 22.Qf1–/+) 22...Nf3–+ 23.Kh1 Nh4 (23...Ng5 24.Rac1–+) 24.Rg1 (24.f3 a5–+) 24...Bf6 (better is 24...d5!? 25.cd5 Bd5–+) 25.Bf6 gf6 (25...Rf6?! 26.Nf6 Qf6 27.Rae1+=) 26.Rae1 f5 (26...Rg8 27.f4–+) 27.Ng3 (27.Qb2 Kh7 28.Ng3 f4–+) 27...f4 28.Ne4 Rg8 29.g3 fg3 30.fg3 (30.Rg3 Qf7–+) 30...Nf5 (30...Bg4 31.gh4 Be2 32.Rg6 Bf3 33.Kg1 Rg6 34.Kf2 Be4 35.Re4 Re4 36.de4–+) 31.Qf3 (31.Qb2 Qg7 32.Qg7 Kg7–+) 31...Ref8 32.Ref1 Kh7 33.Rg2? Nd4 34.Qd1? Rf1 35.Qf1 d5?? 36.Nd2?? (36.Nd2 Bh3 37.Nf3–+; better is 36.Nf6 Kg7 37.Ng8 Kg8 38.Rf2+=). Onkel_Luis – sardanapal, ICC, 2003.

6.a3 0–0 7.c4 Be6 8.d3 Nbd7 9.0–0 Nb6 10.Nbd2 h6 11.a4 Nh7 12.a5 Nd7 13.b5 (13.a6 Qb8+=) 13...Ng5 (13...a6!?=) 14.Ng5 Bg5 15.Nf3 f4 16.Ng5 Qg5 17.ef4 Qf4 18.g3 Qg5 19.Bc1 Qg6 20.Bh5 Qf6 21.Bg4 Nc5 22.Be6 Ne6 23.Be3 Qf3 (23...a6!?+=) 24.Qf3+= Rf3 25.Kg2 Raf8 26.b6 (26.Ba7 Rd3 27.Be3 Nd4+=) 26...ab6 27.ab6 c6 28.Ra7 d5 (28...Nd8!?+=) 29.cd5+/– cd5 30.Rb7 d4 31.Bc1 Nc5 32.Re7 Nd3 33.b7 Nc1 34.Rc1 Rf2 35.Kh3 Rb2 (35...g5 36.Rc6 (36.Re5?! Rb8+/–) 36...g4 37.Kg4+–) 36.Rc8 (36.Rcc7!? Kh8 37.Re5 Rg8+–) 36...d3+/– 37.Re5?? (better is 37.Ree8 Re8 38.Re8 Kf7 39.b8Q Rb8 40.Rb8+–) 37...Rb7+= 38.Rf8 Kf8 39.Rd5 Rb3 40.Kg2 Kf7 41.Kf3 d2 42.Ke2 Rb2 43.Rd2 Rd2 44.Kd2 Kf6 45.Ke3 Kg5 46.h3 h5 47.Ke4 h4 48.Kf3 hg3 49.Kg3 Kf5 50.Kf3 g5 51.Kg3 1–0. Fournier,Frederic (1660) – Isabeau (1715), Active, 2006.

6.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2).

6.d4 e4 7.Nfd2 0–0 8.c4 c6 9.a3 d5 10.0–0 Kh8 11.Nc3 Be6 12.c5 Nbd7 13.b5 a6 14.a4 ab5 15.ab5 Ra1 16.Qa1 Qa8 17.Qa8 Ra8 18.Ra1 Ra1 19.Ba1 g5 20.Bb2 f4 21.bc6 bc6 22.Na4 h5 23.g3 f3 24.Ba6 h4 25.Bb7 Nb8 26.Bc3 hg3 27.hg3 Ng4 (better is 27...Bd8=) 28.Ba5+/– Nh6 29.Bc7 Nd7 30.Bc8 (30.Bc6 Ng8 31.Nb6+–) 30...Nf5 (30...Nc5 31.Nb6=) 31.Bd7 (31.Nb6 Nc5 32.dc5 Bc8 33.Nc8 Bc5+/–) 31...Bd7= 32.Be5 (32.Nb6 Be8=) 32...Kg8+= 33.Nb6 Be6 (better is 33...Be8+=) 34.Nb3+/– g4 (34...Bf7!? 35.Na5 Be8+=) 35.Na5+– Bd8 36.Nc6 Bg5 37.Nb8 (better is 37.Bf4 Bf4 38.gf4+–) 37...Ne3+= 38.fe3 Be3 39.Kf1? (39.Kh2 Bd2 40.N8d7–+) 39...Bf7?? (39...Bd2 40.Bf4 Bf4–+) 40.N8d7 (better is 40.c6 Be8 41.Nd5 Bc6 42.Ne3+–) 40...Be6?? 41.Nf6 Kf7 42.c6 Ke7?? 43.c7 Bd4 44.c8Q Bc8 45.Nc8 Kd8 46.Bd4 Kc8 47.Nd5 Kd7 48.Nf6 Ke6 49.Ne4 Kd5 50.Nf6 Kd4 51.Ng4 Ke4 52.Kf2 Kf5 53.Nh2 Ke4 54.g4 Kf4 55.Kf1 Kg3 56.g5 Kh2 57.g6 1–0. slavisa99 – SgtPepper, Live Game Caissa's Web, 2004.

6.d4 e4 7.Nfd2 0–0 8.c4 Be6 9.Nc3 Nbd7 10.0–0 d5 11.b5 Qe8 12.a4 (12.Qc2 Qg6=) 12...c5 13.cd5 Nd5 (worse is 13...Bd5 14.Nd5 Nd5 15.dc5 Nc5 16.Ne4 Ne3 17.fe3+/–) 14.Bc4 Qf7 15.Qb3 (15.Nd5 Bd5 16.Bd5 Qd5=) 15...N7b6+= 16.Nd5 Bd5 (worse is 16...Nd5 17.f3 ef3 18.Rf3 cd4 19.e4+/–) 17.Bd5 Nd5 (worse is 17...Qd5 18.dc5 Bc5 19.a5 Qb3 20.Nb3+/–) 18.dc5 Bc5 19.Rac1 b6 20.Ba3 Ba3 21.Qa3 Rac8 22.Nc4 (better is 22.Rfd1=) 22...Rc5?? (better is 22...Rc4 23.Rc4 Ne3 24.Re4 Nf1=) 23.Ne5+/– Qe6 (23...Qc7 24.Rc5 Qc5 25.Qc5 bc5 26.Rc1+/–) 24.Rc5 bc5 25.Nc6 f4? (better is 25...Nb4 26.Nb4 cb4 27.Qb4 Rc8+/–) 26.Qc5+– Kh8 1–0. Lorenc,Tomas (2095) – Korschner,Miroslav (2115), CZE–ChT2B, 2011.

6.d4 e4 7.Nfd2 d5 8.b5 0–0 9.0–0 c6 (9...a6 10.Ba3=) 10.a4 b6 11.c4 Bb7 (11...a6 12.Ba3=) 12.Nc3 Nbd7 (12...a6 13.f3=) 13.Qb3+= Kh8 (13...Qc7 14.Ba3 Ba3 15.Ra3+=) 14.Rfd1 (14.bc6 Bc6 15.cd5 Bb7+/–) 14...f4 (14...dc4 15.Bc4 a6 16.Be6+=) 15.ef4 (15.bc6 Bc6 16.cd5 Bb7+/–) 15...Ne8? (15...Rc8 16.Re1+=) 16.g3 (16.bc6 Bc6 17.cd5 Bb7+–) 16...Rf6? (better is 16...Nd6!?+/–) 17.cd5+– cd5 (17...cb5 18.ab5 Rf8 19.Nde4+–) 18.Nd5 Rh6 (18...Rf5 19.Ne7 Qe7 20.Ba3+–) 19.Ne3 (better is 19.Ne4!? Nef6 20.Nef6 Bf6+–) 19...Nd6 20.Ndf1 (20.Ng4 Rh3+–) 20...Qe8 (20...a6 21.Nd5+–) 21.d5 (21.a5 ba5 22.Ra5 Rf6+–) 21...Nc5 22.Qb4 Qd7 (22...a5 23.ba6 Ba6 24.Ba6 Ra6 25.Ng4+/–) 23.Bg4 (23.Ng4 Rh3+–) 23...Qe8 (23...Qd8 24.Rac1+–) 24.Nf5 Nf5 25.Bf5 Nd3 26.Qd4?? (better is 26.Qe4 Nb2 27.Re1+–) 26...Bf6+= 27.Qe4 Qe4 (27...Nb2!? 28.Re1 Qh5+=) 28.Be4= Nb2 29.Rab1 (better is 29.Rdc1=) 29...Nd1–/+ 30.Rd1 Rd8 31.Ne3 Be7 32.Nf5 Bf6 33.Nh6+/– gh6 34.Re1 Bd4 35.Kg2+= Bd5 36.Bd5 Rd5 37.Rd1 Rd8 38.Kf3 Bf6 39.Rc1 Re8 40.Kg4 Kg7+= 41.Kf5 Kf7 42.h4 Bd4 43.f3 Bc5 44.Rd1 Ke7 45.h5= Bf2 46.g4 Bg3 47.Rd4= Rf8 48.Ke5 Rf7 49.Rc4 Kd7 50.Rd4 Ke7 51.Re4 Kd7 52.Rd4 Ke7 53.Rc4 Kd7 ½–½. Hyperboleweevil (1900) – guest397, ICC, 2003.

6.0–0 0–0

7.a3 c6 8.Bc4 Kh8 9.Bb3 =.

7.a3 h6 8.Bc4 Kh8 9.Nc3 b6 (9...c6 10.Bb3=) 10.Nh4+= Qe8 11.f4 ef4 12.ef4 Ne4 13.Ne4 fe4 14.Qe1 Bb7? (better is 14...Bf6!? 15.Bf6 Rf6+/–) 15.Qg3+– Bf6 16.Ng6 Kh7 17.Nf8 Qf8 18.c3 Nd7 19.Be6 Qe7 20.Bf5 Kg8 21.d3 e3 (21...a5 22.Qe3+–) 22.Bd7 e2 (22...Qd7 23.Rae1+–) 23.Rfe1 Bh4 (23...Qd7 24.Re2 Re8 25.Re8 Qe8+–) 24.Qg4 Qe3 25.Kh1 Be1 26.c4 (26.Re1 Qf2 27.Qe6 Kh8–+) 26...Bg2 (26...Bc3 27.Bc3 Qe7+–) 27.Qg2 Bg3 28.Qa8 Kh7 (28...Kf7 29.Re1! g6 30.hg3 h5+–) 29.Bf5 (29.Bf5 g6 30.Qh8) 1–0. wesolyPolak (1800) – Mr.X69, GameColony.com, 2002.

7.a3 Kh8 8.d4 e4 9.Nfd2 d5 10.c4 c6 11.Nc3 g5 (11...Be6 12.c5=) 12.cd5 cd5 13.Rc1 f4 14.Nb3 f3 (14...Nc6!?+=) 15.gf3+/– ef3 16.Bf3 g4 17.Bg2 Bd6 18.Nb5 Nc6 19.Nd6 Qd6 20.Qc2 a6 21.Rfe1 g3? 22.hg3 Ng4 23.f3 Qh6 24.fg4 Qe3 25.Re3 1–0. b4_player (2145) – hongkongfui (1930), GameColony.com, 2002.

7.c4 (--> 1.b4 e5 2.Bb2 d6 3.c4 f5 4.e3 Nf6 5.Nf3 Be7 6.Be2 0–0 7.0–0).

7.d3 Nc6 8.b5 Nb8 9.c4 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Nbd7 13.Nbd2 Nc5 14.d4 ed4 15.ed4 Ne6 (15...Nce4 16.d5+=) 16.Qb3 (16.d5 Nf4+=) 16...Nf4 (16...d5+=) 17.c5 (17.Re1!?+=) 17...Kh8= 18.Bc4 d5 (18...dc5 19.Rd1=) 19.Bd3 Ne4 20.Ne5?? (better is 20.Bc2=) 20...Nd2–+ 21.Qc2 (21.Qc3 Nf1 22.Bf1 Bg5–+) 21...Nf1 (worse is 21...Nd3 22.Ng6 hg6 23.Qd2 Nf2 24.Rf2–+) 22.Kf1 (22.Bf1 Bf6–+) 22...Nd3 23.Qd3 Bf6 24.Qg3 (24.Kg1 f4–+) 24...Qe8 (24...Bd7 25.Qb3–+) 25.f4 (25.Qd3 Bd7 26.Nd7 Qd7–+) 25...Qb5 (25...Qb5 26.Kf2 b6–+) 0–1. GuestVGMK – GuestLKTQ, freechess.org, 2017.

7.d3 e4 8.Nfd2 d5 9.a3 a5 10.b5 =.

7.d3 Be6 8.c4 Nbd7 9.Nbd2 Bf7 10.Ng5 Qe8 11.Bf3 Rb8 12.e4 fe4 13.Nde4 Ne4 14.Nf7 Qf7 15.Be4 Nf6 16.Bf3 c6 17.a4 a6 18.Qe2 Kh8 19.Rfe1 Nd7 20.d4 Bf6 21.d5 c5 22.Qd2 b6 23.Bg4 Rb7 24.b5 a5 25.Rf1 Qg6 26.Qe2 Bg5 27.Bh5 Qh6 28.Ra3 Nf6 29.Rh3 Nh5 30.Rh5 Qg6 (30...Qf6!?=) 31.Qg4+/– Bh6 32.Qg6 hg6 33.Rh4 Rf4 34.Rf4 Bf4 35.g3 Bh6 36.f4 ef4 37.gf4 Re7 38.f5 (better is 38.Rf2!?=) 38...gf5–/+ 39.Rf5 Kg8 40.Rf3 Re4 41.Rc3 Be3 42.Kg2 Bd4 43.Rc2 Bb2 44.Rb2 Rc4 0–1. Szymanski,Leszek (1870) – Bulakowski,Andrzej, Mistrzostwa Polski w Szachach Niepelnosprawnych Poland, 2009.

7.d3 h6 8.Nbd2 (8.c4 Be6 9.Nbd2 a5 10.b5=) 8...Be6 (8...a5 9.b5 Be6 10.c4=) 9.a3 (9.c4 a5 10.b5=) 9...Nbd7 (9...c6 10.c4=) 10.d4 (10.c4=) 10...e4 11.Nh4 (11.Ne1 d5=) 11...Kh7 12.Bh5?? (better is 12.c4+=) 12...Nh5–+ 13.Qh5 Bh4 14.c4 Bf6 0–1. Erbe,Holger (1665) – Blankenberg,Bruno (1960), DESC, 2000.

4.f4 e4

5.a3 Nf6 6.Bc4 d5 7.Bb3 Be6 (7...Be7 8.Ne2=) 8.Ne2= a5 9.Nd4 Bd7 10.b5 c5 11.bc6 bc6 12.c4 Na6 13.0–0 Nc5 14.cd5 cd5 15.Nc3 Rb8 16.a4 (16.Rb1 Nd3=) 16...Nb3+= 17.Nb3 Be7 18.Nd5 Nd5 19.Bg7 Bf6 (19...Rf8 20.Bf8 Kf8 21.Nd4+=) 20.Bh8 (20.Qh5 Ke7 21.Bh8 Qh8= (21...Ba1? 22.Ba1 Rb3 23.Qg5 Ke8 24.Qg8 Ke7 25.Qd5+–)) 20...Bh8 21.Qh5 Kf8 22.Rab1 Nf6 (22...Ba4 23.Nc5 (23.Qf5?! Kg8 24.Nc5 Bb5+–) 23...Rb1 24.Rb1+–) 23.Qg5 Qb6? (better is 23...Rb4 24.Nc5 Bc8+=) 24.Nc5!+– Qb1 (24...Qc5 25.Rb8 Discovered attack (25.Rb8 Pinning; 25.Rb8 Deflection; 25.Rb8 Clearance)) 25.Nd7 Nd7 26.Rb1 Rb1 27.Kf2 Nf6 28.Qf5 h5 29.h3 h4 30.Qg5 Bg7 31.Qh4 (31.Qa5 Rb2+–) 31...Rb4 (better is 31...Rb2!? 32.Ke2 Ra2+–) 32.Qg5 Ra4 33.g4 Ra1 34.h4 (34.Qc5 Kg8+–) 34...a4? (34...Kf7 35.Qf5 Rd1 36.Qa5 Ng4 37.Ke2+–) 35.h5 (35.Qc5 Ke8 36.g5 Nd7+–) 35...a3 (better is 35...Rc1!?+–) 36.h6 Ng4 (36...Bh8 37.Qc5 Kf7 38.Qc4 Kg6+–) 37.Qg4 Bh6 38.Qf5 Kg8 39.Qe6 (worse is 39.Qe4 Bg7+–) 39...Kh7 40.Qe4 Kh8 41.Qa8 (better is 41.f5 Rd1 42.Qe8 Kg7 43.Qg6 Kf8 44.Qh6 Ke7 45.f6 Ke6 46.Qh3 Kd6 47.Qg3 Ke6 48.Qg4 Kf6 49.Qd1+–) 41...Kh7 42.Kf3 Bg7 43.d4 a2 44.Ke4 (better is 44.Qa6!? Bf6+–) 44...Bd4 45.Qb7 Bg7 46.Qa7 (46.Qf7 Rb1 47.Qa2 Rb6+–) 46...Kh8 (46...Kg8+–) 47.Kf5 Re1 48.Qa2 Re3 49.Kg6 Rg3 50.Kf7 Bh6 51.Qh2 (better is 51.f5!? Rg7 52.Ke6 Rg8+–) 51...Rg7 52.Kf6 Kh7 (52...Rh7 53.Kg6 Rg7 54.Kf5+–) 53.f5 Rg8 54.Ke7 Ra8 55.f6 Ra7 56.Ke6 (56.Kd8!? Ra8 57.Kc7 Rg8 58.Qc2 Rg6+–) 56...Ra6 57.Ke7 Ra7 58.Kd8 Ra8 59.Kc7 Rg8 (59...Ra6 60.Qc2 Kh8 61.Qg6+–) 60.Qh5 (60.Qc2 Kh8+–) 60...Rg6 61.Qf5 Bf8 62.Kd8 Kh6 63.Qh3 (63.Ke8 Rg5 64.Qh3 Kg6 65.Kf8 Kf6 66.Qh6 Kf5+–) 63...Kg5 64.f7 Bd6 65.Ke8 Rf6 66.Qg2 Kh6 67.Qd2 Bf4 (67...Kh5 68.Qd6! Rd6 69.f8Q+–) 68.Qd4 Rf7 69.Kf7 Kg5 70.Qe4 Bg3 71.Ke6 Bh2 1–0. Weigel,Hans Juergen (1935) – Fronczek,Heinrich (2235), GER–chT Seniors, 2003.

5.c4 Nf6+= 6.Bf6 (6.Nc3 Be7=) 6...Qf6 (worse is 6...gf6 7.Qh5 Ke7 8.Nc3+=) 7.Nc3 c6 8.Nge2 Be7 9.Nd4 Qg6 10.Rb1 (10.d3 0–0+=) 10...0–0 11.b5 c5 12.Nde2 Be6 (12...a6 13.Nd5 Qf7 14.Nb6=) 13.Nd5 (13.d3 Bf6+=) 13...Bd5 14.cd5 Nd7 15.Nc3?? (better is 15.d3+=) 15...Bh4–+ 16.g3 Bg3! 17.hg3 Qg3 18.Ke2 Qf3 19.Ke1 Qh1 20.Qe2 (20.d3 Nf6–+) 20...Rf6 (better is 20...Nf6 21.d3–+) 21.b6 (21.d3 ed3 22.Qd3 Rc8–+) 21...a6 (better is 21...Nb6!? 22.d3–+) 22.Qc4 (22.d3 ed3 23.Qd3 Re8–+) 22...Rg6 23.Kd1 (23.Qe2 Rh6 24.Qg2 Qg2 25.Bg2 Kf7–+) 23...h5 (23...Rg1 24.Kc2–+) 24.Kc2 (24.Qe2 Rg1 25.Kc2 Qf3–+) 24...Rg1 25.Qa4 Nf6 (25...Nb6 26.Qb3–+) 26.Bb5 Rb1 (26...ab5?! 27.Qa8 Kh7 28.Qc8 Rb1 29.Nb1–+) 27.Nb1 h4 (27...Rd8 28.Bc4–+) 28.Bc6 (28.Bd7 h3 29.Nc3 h2 30.Bf5 Qf3 31.Ne4 h1Q–+) 28...h3 29.Bb7 White gets in control 29...Rf8 30.Qa6 (30.Qc6 h2 31.Qd6 Qe1–+) 30...Nd7 (better is 30...h2 31.Qe2 Rb8–+) 31.Bc8 Nb6 (31...h2 32.b7 Qe1 33.Bd7 h1Q–+) 32.Be6–/+ Kh7 33.Qb6 Qf1 (33...h2 34.Qd6 Rf6 35.Qd7–+) 34.Qd6 Qd3 35.Kb2 Qb5 36.Kc2 Qd3 (36...Qc4 37.Nc3 Qd3 38.Kb3 c4 39.Kb4+–) 37.Kb2= Qb5 38.Kc2 Rb8 (38...Qc4 39.Nc3 Qd3 40.Kb3 c4 41.Kb4+–) 39.Bf5= Kh8 Do you see the mate threat? 40.Nc3 Qb2?? (better is 40...Qd3! 41.Kc1 Qf1 42.Nd1 Qc4 43.Nc3 Qf1 44.Kc2 Qd3 45.Kd1 Qf1 46.Kc2 Qd3=) 41.Kd1+– Threatening mate... how? 41...h2 42.Be4 Qa1 43.Ke2 Re8 44.Qc6 (better is 44.Nd1 Kg8 45.Qd7 Re4 46.Qc8 Kf7 47.Qf5 Qf6 48.Qe4 Qa6 49.Ke1 Qa2 50.Qf5 Ke7 51.Qh5+–) 44...Re4 45.Qc8 (45.Ne4 h1Q Theme: Double Attack) 45...Kh7 46.Qh3 Kg8 47.Qh2 Rb4 48.Qh3 Qg1 49.Qc8 (49.a4 Rb8+–) 49...Kh7 50.Qf5 (50.a3 Qh2 51.Kd3 c4 52.Ke4 Rb3 53.Qc4 Ra3+–). Chirpii,Alexandru (2150) – Orlinkov,Maxim L (2330), Eforie Nord op, 2002.

5.Bc4 Qh4 6.g3 Qh6 7.d4 (7.Nc3 Nf6=) 7...Nf6 (7...d5 8.Bd5 Nf6 9.Bc4=) 8.Nc3 (8.d5 Be7=) 8...c6 9.d5 Nbd7 10.Bb3 Be7 11.dc6 bc6 12.b5 Bb7 13.Nge2 Qh3 (13...Qg6 14.Nd4 c5 15.Ne6+=) 14.bc6 Bc6 15.Nd4 Rc8 16.Qe2 Nc5 17.Nc6 Rc6 18.Bc4 Rb6 19.0–0–0 (19.Rb1 a6=) 19...Qh6 (19...a6 20.Nd5 Nd5 21.Rd5=) 20.Qd2 (20.Nb5 a5=) 20...Rb7 (20...a6!?+=) 21.Nb5 The pressure on the backward pawn d6 grows 21...d5 22.Bd5 (22.Bf6 dc4 23.Be7 Ke7+/–) 22...Nd3= 23.cd3 White gets in control. 23...Nd5 24.de4 Qc6 25.Nc3 Nc3 (25...Nb4 26.ef5 Na2 27.Kc2 Bf6–+) 26.Qc3+/– Qc3 27.Bc3 fe4 28.Rd4 Rc7 29.Kd2 0–0 (29...Kf7 30.Re4 Rhc8 31.Be5 Rc2 32.Kd3 Ra2 33.Bg7+–) 30.Re4 Rfc8 31.Be5 Rc2 32.Kd3 Bd8 (32...Bf6 33.Bf6 gf6 34.Ra4 R8c3 35.Ke4+–) 33.Ra4 Bb6 34.e4 Rf2 35.Bd4 Rd8 36.a3 Ra2 37.e5 Bd4 38.Rd4 Ra3 39.Ke4 (39.Ke4 Rd4 40.Kd4+–) 1–0. De Smet,Karl – Pohl, corr ICCF TT–4–90 SF, 1995.

5.Ne2 Nf6 6.a3 Bd7 7.c4 b5 (7...Be7 8.d3=) 8.Nd4 bc4 9.Bc4 d5 10.Be2 c6 (10...c5 11.bc5 Bc5 12.Nb3=) 11.Nc3 Be7 12.Rc1 a5 13.Qb3 ab4 14.ab4 Qb6 (better is 14...Ra7=) 15.Na4 (better is 15.b5 0–0 16.Bd1+=) 15...Qb4–/+ 16.Qb4 Bb4 17.Nb6 Ra2 18.Bc3 (18.Rb1 0–0–/+) 18...Bc3 19.Rc3 g6 20.Nb3 Rb2 21.Kf2 Ke7 22.Ra1 Be6 (22...c5!? 23.Nd7 Nbd7 (23...Kd7?! 24.Nc5 Kd6 25.Na4=) 24.Nc5 Rd2–/+) 23.Na4= d4 24.Nd4 Rd2 25.Ke1 Rd4 26.ed4 Nd5 27.Rcc1 Nf4 28.g3 Ne2 29.Ke2 Rd8 30.Ke3 Bd5 31.Nc5 Nd7 32.Ra7 Ke8 33.Nd7 (33.Rb1!? Nc5 34.dc5+=) 33...Rd7+= 34.Rd7 Kd7 35.Ra1 Ke6 36.Ra7 h6 37.Rh7 h5 38.h4 Kf6 39.Rh8 Ke7 40.Kf4 Kf6 41.Rc8 Ke7 42.Rb8 Kf6 43.Re8 Kf7 44.Rb8 Kf6 45.Rb1 Bc4 46.Rc1 Bd5 47.Rc3 Kg7 48.Kg5 Kf7 49.Ra3 Bc4 ½–½. Kozlowska,Marzena – Piechota,Pawel, Poznan op–B Poland, 2004.

5.Nh3 Nf6 6.Be2 d5 7.a3 Be7 8.0–0 0–0 9.Nf2 a5 10.c3 Be6 11.d3 c5 12.bc5 Bc5 13.d4 Be7 14.Nd2 Nbd7 15.Kh1 Nb6 16.Rb1 Nc4 17.Nc4 dc4 18.g4 b5 19.gf5 Bf5 20.a4 Nd5 21.Qd2 g5 (21...Nb6!? 22.ab5 Qd5+=) 22.ab5 gf4 23.Bc4 (23.ef4?? e3 24.Qe1 Bh4 25.Bc4 A) 25...ef2? 26.Qe5 Qf6 A1) worse is 27.Qd5 Kh8 28.Qf3 Qg6–+ (28...Bb1 29.Rb1 Rg8 30.Bg8 Rg8 31.Qe2–+); A2) 27.Bd5 Kg7 28.Ba8 Ra8 29.Kg2+–; B) 25...Bf2 26.Rf2 ef2–+ (26...Bb1?! 27.Rg2 Bg6 28.Qe3–/+)) 23...Kh8 24.Bd5 (24.ef4? e3 25.Qe1 Bb1 (25...ef2?! 26.Qe5 Rf6 27.Bd5=) 26.Qb1 ef2 27.Rf2 Nf4–+) 24...Qd5 25.c4 Qc4 26.d5 Bf6? (26...Kg8 27.d6 Rfd8+/–) 27.Rfc1+– Qa4 28.Rc6 Kg7 29.Rg1 Bg6 30.Rf6 (better is 30.Bf6!? Kg8 31.ef4 Qb5+–) 30...Rf6 31.Ng4 Qb5 32.Bf6 (32.Nf6 Kf7+–) 32...Kf7 (32...Kf8 33.Qd4 Qb7+–) 33.Qc3 Ra7 34.Nh6 1–0. Valiente,C (2255) – Zacarias,M (2210), III Carlos Gamarra Mem, Asuncion URU, 2010.

5.Qh5 Ke7 6.Ne2+= Qe8 7.Qg5 Nf6 8.Ng3 Qg6 9.Qg6 hg6 10.Be2 Be6 11.a3 Nbd7 12.Nc3 Kf7 13.Nb5 Ne8 14.Nd4 Nef6 15.Ne6 Ke6 16.Rb1 Be7 17.0–0 Kf7 18.Bd4 b6 19.Bb2 a5 20.b5 d5 21.d3 Rhd8 22.Rbd1 Nc5 23.Bc1 Kf8 (23...ed3 24.cd3 Na4 25.Rd2=) 24.d4 (24.Kf2!?+=) 24...Na4=+ 25.Bd2 Ne8 (25...Ba3!? 26.Ra1 Bb4 27.Bb4 ab4=+) 26.Ra1= Nd6 27.Rfd1 Nb2 28.Rdb1 Nbc4 29.Bc1 Bh4 (29...g5 30.Ra2=+) 30.Nh1 (30.Nf1 a4=+) 30...a4 (30...g5 31.g3 gf4 32.ef4–/+) 31.Nf2=+ Bf2 (31...Ra5 32.Rb4=+) 32.Kf2= Ra5 33.Rb4 Rda8 34.Rab1 Ke7 35.h3 Kf6 36.h4 Rh8 37.g3 Rha8 38.c3 Rh8 39.Bd1 Rha8 40.Be2 R5a7 41.Ke1 Kf7 42.Kd1 (42.Kf2 Ke6=) 42...Ke7 (42...Ke6 43.Ke1=) 43.Ke1= Kd7 44.Kf2 c6 45.bc6 Kc6 46.Bb2 (46.g4 Rh8 47.Kg3 Rc8=) 46...b5 47.Bc1 Ra5 (48.g4 Rh8=) =. marekt (2250) – DuongThanh (2135), ICC, 2003.

5.Qh5 g6 6.Bb5 c6 =.

5.Qh5 g6!? 6.Qd1 Nf6 =.

5.Bc4 Nf6

6.a3 d5 7.Bb3 a5 8.Nc3 Na6 9.b5 Nc5 10.Nge2 Be7 11.Na4 Nb3 12.cb3 0–0 13.Rc1 Bd7 14.Nd4 Rc8 15.Nc5 Bc5 16.Rc5 c6 17.bc6 bc6 18.Qc2 Qb6 19.0–0 Rc7 20.Rc1 Rb8 (20...Kh8!?+/–) 21.Qc3+– Ra7 22.a4 (better is 22.Nc6!? Bc6 23.Rc6 Qb3 24.Qe5+–) 22...Ra6+/– 23.h3 (23.Nc6 Bc6 24.Rc6 Qc6 25.Qc6 Rc6 26.Rc6 Rb3 27.Bf6 gf6+/–) 23...h6 (23...Rc8 24.Qc2=) 24.Kf2 (24.Nc6 Bc6 25.Rc6 Qc6 26.Qc6 Rc6 27.Rc6 Rb3 28.Bf6 gf6 29.Rf6+/–) 24...Kh7? (24...Rc8 25.Qc2=) 25.Ke2 (25.Nc6 Rc8 26.Nd4 Raa8+–) 25...Kg6 (25...Rc8 26.Kf1=) 26.Kd1 (better is 26.Nc6!? Bc6 27.Rc6 Qc6 28.Qc6 Rc6 29.Rc6 Rb3 30.Bf6 gf6 31.Rc5+/–) 26...Rc8= 27.Kc2 Kh7 28.Kb1 Kg8 29.Ka2 (29.g4 fg4 30.hg4 Bg4 (worse is 30...Ng4 31.Ne6 Kf7 32.Qg7 Ke6 33.f5 Kd6 34.Rd5 Kc7 35.Qd7 Kb8 36.Rb5+–) 31.Nc6 Kh7+=) 29...Kh7 (29...h5 30.Qc2=) 30.Rg1 (30.g4 fg4 31.hg4 Bg4 (31...Ng4?? 32.Ne6 Rg8 33.Nf8 Kh8 34.Nd7+–) 32.Nc6 Bd7+=) 30...Kh8 31.Ne2 Ra7 32.Rc1 Ra6 (32...Kh7 33.Nd4=) 33.Qc2+= Ne8 34.Be5 Qd8 35.Qc3 Kh7 36.g3 Qb6 37.Rg1 h5 38.Rc1 Qd8 39.Nd4 Qb6 40.Qc2 Qd8 (40...Nf6!?+/–) 41.Qd1 Kg6 42.g4! hg4? (42...fg4 43.f5 Double attack; 42...hg4 43.hg4 Combination) 43.hg4 fg4 44.f5! Bf5?? (better is 44...Kf7 45.Qg4 Qe7+–) 45.Qf1 (45.Qf1 Bd7 46.Qa6+–) 1–0. Mrykhin,Igor (2110) – Ignatyev,Viktor (2250), St Petersburg RUS, Chigorin Mem, 2012.

6.a3 d5 7.Be2 c5 8.b5 a6 +=.

6.Bb5!? c6 7.Be2= d5 8.a3 c5 =.

6.Nc3 d5–/+ 7.Bb3 (7.Be2 Bb4 8.Nh3 0–0–/+) 7...Bb4 8.Qe2 (8.Nge2 0–0–/+) 8...c6 (8...0–0–/+) 9.Nh3 0–0 10.Nf2 a5 11.a3 Bd6 12.g4 Ng4 (12...a4 13.Ba2–+) 13.Ng4–/+ fg4 14.Ne4 Qh4 15.Ng3 (15.Kd1 Be7–/+) 15...Kh8 16.0–0–0 (16.c4 a4 17.Ba2 Qe7–/+) 16...Nd7 17.h3 (17.Rdg1 b5 18.Bg7 Kg7 19.Nf5 Rf5 20.Rg4 Qg4 21.Qg4 Kf6 22.Qh4 Ke6–/+) 17...gh3 (better is 17...Nf6 18.Qf2 gh3–+) 18.e4? (18.Nh5!? Nf6 19.Nf6 Rf6 20.Rdg1–+) 18...Nc5 (better is 18...Nf6!? 19.e5 Qg3 20.ef6 gf6–+) 19.Rdg1 Bg4 (19...Qf4 20.Bg7 Kg8 21.Nf5 (21.Bf8 Nb3 22.cb3 Qf8 23.Nf5 Kh8 24.Nd6 Qd6+–) 21...Nb3 22.cb3 Rf5 23.Bh6 Kf7 24.Bf4 Rf4 25.ed5 Ba3 26.Kd1+–; 19...Rf4 20.Bg7 Kg8 21.Nf5 Nb3 22.cb3 Bf5 23.Bf6 Kf8 24.Bh4 Ba3 25.Kd1+–; worse is 19...Bf4 20.Nf5 Bf5 21.Bg7 Kg8 22.ef5+/– (22.Bf8 Kf8 23.ef5 Ne4–/+); 19...Nb3?! 20.cb3 Qe7 21.ed5 Qe2 22.Ne2–+) 20.Nf5 Rf5?? (better is 20...Be2 21.Bg7 Kg8 22.Nh4 Ne4 (22...Nb3?! 23.cb3 Kf7 24.Bf8 Bf8 25.ed5=) 23.Be5 Kf7 24.Bd6 Nd6 25.Rh3 a4–+) 21.Rg4+– Rf4 22.Bg7 (22.Rh4 Rh4 23.ed5 Nb3 24.cb3 cd5+–) 22...Kg8 23.Rh4 Rh4 (23...Nb3 24.cb3 Rh4+–) 24.Bf6?? (24.Bb2!? Ne4 25.d3 Ng5+–) 24...Nb3 25.cb3 Re4 26.Qh5 h2 27.Qh6 (27.d3 Re6 28.Qg5 Kf7 29.Qg7 Ke8 30.Qg8 Kd7 31.Qa8 Rf6 32.Qb7 Kd8 33.Qa8 Kd7 34.Qa5 Ke6+–) 27...Kf7? (better is 27...Rg4 28.Qe3 Kf7+/–) 28.Bg5 Rae8 (28...Ba3 29.Kd1 Rae8 30.Qh7 Ke6 31.Rh2 Re7 32.Be7 Be7 33.Rh6 Kd7 34.Qf5 Kc7+–) 29.Qh7 Ke6 30.Rh2 (better is 30.Qh3 Ke5 31.Qh2 Ke6 32.Qh3 Ke5 33.Qg3 Kf5 34.Rf1 Bf4 35.Bf4 Re1 36.Re1 Re1 37.Qe1 Kf4 38.Qh4 Kf5 39.Qh7 Ke6 40.Qb7+–) 30...Bh2 31.Qh2 Kd7 32.Be3 Re3 (better is 32...d4!? 33.Bf4 R8e7+–) 33.de3 Re3 34.Qh7 Re7 35.Qf5 Kc7 36.Kd2 (36.Qf4 Kb6+–) 36...b6 37.Qf6 (37.Qf4 Kb7+–) 37...Rd7 38.Qe5 Kb7 39.Qe8 Rh7 (39...Kc7 40.Qe3+–) 40.b4 ab4 41.ab4 Rh2 42.Ke3 Rh3 43.Kf2 Rc3 44.b5 cb5 45.Qd7 Ka6 46.Qd5 b4 47.Ke2 Rc5 48.Qb3 Kb5 49.Kd2 ½–½. Moehring,Nicholas – Zunker,Reinhard (2270), Alpenpokal op, 1994.

6.Bf6 Qf6 7.Nc3 =.

4.g3 Nf6

5.c4 Be6 6.d3 (6.Nf3!?=) 6...Be7 7.Bg2 c6 (7...d5 8.Nf3 Bb4 9.Bc3+=) 8.Ne2 (8.Nf3 0–0=) 8...0–0 9.0–0 d5 (9...Nbd7 10.Nbc3=) 10.c5 (10.Be5 dc4 11.dc4 Bc4+=) 10...e4 (10...Nbd7 11.d4 Qc7 12.Nbc3=) 11.de4 fe4 (worse is 11...Ne4 12.f3 Nf6 13.Nbc3+=) 12.Nf4 Qd7 13.Re1 (13.Nd2 a5 14.a3 ab4 15.ab4 Ra1 16.Ba1 Na6+=) 13...b6+= 14.Bd4 (worse is 14.Ne6 Qe6 15.cb6 ab6+=) 14...bc5 15.bc5 (worse is 15.Ne6 Qe6 16.bc5 Na6–+) 15...Na6 16.Ne6 (better is 16.Qc2!?+=) 16...Qe6–+ 17.Qa4 (17.Nc3 Nc5 18.Rf1 Nd3–/+) 17...Nc5 18.Bc5 Bc5 19.Nd2 Bb6 20.Rac1 Rac8 21.Qb3 Ng4 22.Re2? (22.Bh3 Rf6–+) 22...Rf6 (22...Rf2 23.Rf2 Be3 24.Ne4 Bc1 25.Rf1 Be3 26.Kh1–+) 23.Rf1 c5 24.Qb2 d4?? (better is 24...c4 25.Qc3 Rcf8–+) 25.Ne4 Rf5 26.h3 (26.ed4 cd4 27.Rd1=) 26...Nf6 (better is 26...d3!? 27.Rd2 Ne5–/+) 27.Nf6+= Qf6 28.Kh2?? (28.Be4 Rh5+=) 28...c4 (better is 28...d3 29.Qf6 gf6–+) 29.Be4?? (29.ed4 Bd4 30.Qb7=) 29...Re5?? (29...d3 30.Qf6 Rf6–+ (30...gf6?! 31.Bf5 de2 32.Re1+=)) 30.ed4+= Ree8 31.f3 (31.Qb5!? Kh8 32.d5+/–) 31...Bd4+= 32.Bd5 Kh8 33.Re8 Re8 34.Qg2 (better is 34.Qb5!? Re2 35.Kh1+=) 34...c3+= 35.Bb3?? (35.Rd1 g6–/+) 35...Re3 (35...Qa6 36.Rb1 Re2–+) 36.Bc2 (36.f4 Qd8+=) 36...Qe7 (better is 36...Qa6 37.Bd1 g6–+) 37.Kh1?? (better is 37.Be4+=) 37...Re2–+ 38.Qg1 (38.Rb1 g6 39.Qf1–+) 38...Bg1 (38...Rc2?! 39.Qd4 h6 40.Qf4–+) 39.Kg1 (39.Rd1 Rc2 40.h4 Bb6 41.Rc1 Rc1 42.Kg2 Qe2 43.Kh3 Qf3 44.a3 Rh1) 39...Qe3 0–1. nordlicht (1955) – checkbo, gameknot.com, 2013.

5.c4 Be7 6.Bg2 0–0 7.Ne2 Qe8 (7...a5 8.b5=) 8.Nbc3 Nc6 9.a3 a6 (9...e4 10.d4=) 10.Nd5 Bd8 11.f4 Be6 12.Qc2 Qf7 13.Nf6 Bf6 (worse is 13...Qf6 14.d4 Bc8 15.de5 de5 16.b5+/–) 14.fe5 de5 15.Rc1 e4 16.Bf6 Qf6 17.0–0 Qe7 18.Nf4 (18.d4 ed3 19.Qd3 Ne5+=) 18...Rad8 (18...Ne5 19.Be4 fe4 20.Qe4+=) 19.Rf2 (better is 19.d4!? ed3 20.Nd3+=) 19...Ne5+= 20.Nd5? (better is 20.Bf1+=) 20...Bd5–+ 21.cd5 Nd3 (21...Rd5?! 22.Rcf1 (22.Qc7? Rd7 23.Qc5 Nd3 24.Qe7 Re7–+) 22...Rdd8 23.Rf5 Nf3 24.Bf3 Rf5 25.Be4 Rf1 26.Kf1+=) 22.Qc7 Qc7 (22...Rd7!? 23.Qc3–+) 23.Rc7–/+ Nf2 24.Kf2 Rd5 25.d4 a5 (25...Rd4 26.ed4) 26.Rb7 (26.Bf1 Kh8 27.Rb7 Rc8+=) 26...Rc8 27.Bf1 Rc2 28.Kg1 ab4 29.Rb4 Rd8 (29...Ra5 30.a4–/+) 30.Bc4 (30.a4 Kf8+=) 30...Kf8–/+ 31.Be6 g6 32.d5 Ke7 33.Rb3 (33.g4!?–/+) 33...Kd6 34.h3 Ke5 35.h4 (35.Kf1 Ra8–+ (35...Rd5?! 36.Bd5 Kd5 37.a4–/+)) 35...h6 (35...Ra8 36.h5–+) 36.Kf1 (36.a4 Ra8 (36...Rd5?! 37.Bd5 Kd5 38.Rb5 Rc5 39.Rb6+=) 37.Ra3 Rb8–+) 36...g5 Black prepares f4 (36...Ra8 37.Bf7 Rac8 38.Rb1–+) 37.h5 (37.a4 Ra8 (37...Rd5?! 38.Bd5 Kd5 39.a5+=) 38.Rb4 gh4 39.gh4 Ra2–+) 37...f4 (37...Ra8 38.Bd7–+) 38.g4 (38.ef4 gf4 39.gf4 Kf4–+) 38...fe3 (38...Ra2!? 39.Rb7–+) 39.Re3 Rf8 40.Kg1 (40.Bf5 Kd5 41.Ke1 Re8–+) 40...Kd4 (40...Rff2 41.Rc3 Rg2 (41...Rc3?! 42.Kf2 Ra3 43.Ke2–+) 42.Kh1 Rh2 (42...Rc3?! 43.Kg2 Rf3 44.Bd7–+) 43.Kg1 Rcg2 44.Kf1 Rb2–+) 41.Re1 Rff2 (41...e3!? 42.Bf5 Ra2–+) 42.d6–/+ Rg2 43.Kh1 Ke5 44.d7 Rgd2 45.Bf5 Rc4 (45...Kf4 46.Rf1 Kg3 47.Be4–+) 46.Kg1–/+ Kf4 47.Kf1 (47.Rf1 Kg3 48.Re1–+) 47...Kf3 48.Kg1 0–1. Williams,Barry M – Steadman,Michael V R, NZCCA TT res corr9899, 1998.

5.Bg2 (--> 1.b4 e5 2.Bb2 d6 3.g3 f5 4.Bg2 Nf6 5.e3).

4.Qh5 g6

5.Qd1 Nc6 6.b5 Na5 (6...Nb8 7.Nf3=) 7.Bc3 (7.d4 d5+=) 7...b6 8.f4 Bd7 (8...Bg7!?+=) 9.fe5+/– Be7?? (9...de5 10.Nf3+/–) 10.ed6 (better is 10.e6 Bf6 11.ed7 Qd7 12.Nf3+–) 10...Bf6 11.dc7 Qc7 12.Bf6 Nf6 13.Nf3 0–0 14.Be2 Ne4 (14...Rae8 15.a4+–) 15.d3 (15.0–0 f4+–) 15...Nc5 (15...Nc3 16.Nc3 Qc3 17.Kf2 Bb5 18.Qd2+/–) 16.0–0 (16.c4!?+–) 16...Bb5+/– 17.c4 Ba6 18.Nc3 Qe7 (better is 18...Bb7+/–) 19.d4?? (19.Nd5 Qd6 20.Nd4 Rad8+–) 19...Ne4?? (19...Qe3!? 20.Kh1 A) < 20...Bc4 21.Bc4 (< 21.dc5 Qc3 22.Rc1 Qc1 23.Qc1 Be2+=) 21...Nc4 22.dc5+–; B) 20...Qc3 21.dc5 Rad8=+ (21...Bc4?! 22.Rc1 Qc1 23.Qc1 Be2 24.Rf2+=; 21...Nc4? 22.Qa4+–)) 20.Nd5 (20.Qc1+/–) 20...Qe8? (better is 20...Qb7=) 21.Nc7+– Qc6? 22.Na6 Nc4 23.Rc1 b5 24.Nb4 Qc8 25.Bc4 bc4 26.Ne5 c3 27.Qb3 Kh8 28.Nbc6 Nd2 29.Qc3 Nf1 30.Kf1 a5 31.Ne7 Qc3 32.Rc3 Rfe8 33.Nd5 Rad8 34.Rc5 a4 35.Ra5 Kg7 36.Nc7 1–0. annmarie – druifje13, Live Game Caissa's Web, 2004.

5.Qd1 Be6 6.c4 (6.Nf3 Bg7 7.Be2 g5 8.0–0 g4 9.Ne1=; 6.d4 Bg7 7.Ne2 Nd7 8.d5 Bf7 9.c4=) 6...Bg7 7.d4 Nd7 8.d5 Bf7 9.Nf3 =.

5.Qe2 Ne7 6.f4 Bg7 7.fe5 de5 8.Nf3 e4?? 9.Bg7+/– ef3 10.Qf3 Rg8 11.Bf6 Nbc6 12.a3 Be6 13.Nc3 Qd6 14.0–0–0 Nb4? 15.ab4 Nd5 16.Nd5?? Bd5=+ 17.Qe2 Qb4?? 18.Qb5+– Qb5 19.Bb5 c6 20.Be2 Bg2 21.Rhg1 Be4 22.Bc4+– Rf8? 23.Bg7 (23.Bg7 a5 24.Bf8 Kf8 25.d3+–) 1–0. Chairboy – aligarjon, ChessWorld.net, 2005.

5.Qe2 Bg7 6.Nf3 (6.d4 Nd7=) 6...Nf6 7.Nc3 Be6 (7...Nc6!?=) 8.Qb5+= Nbd7 9.Qb7 Rb8 10.Qa7 Rb4 11.Qa3 Qb8 12.Rb1 Nd5 (12...h6 13.Be2+=) 13.Nd5 (13.Ng5 Bg8+=) 13...Bd5 14.c3 (better is 14.Be2+=) 14...Rb7 15.Be2 e4 (15...Ra7 16.Qb4 Qb4 17.cb4 Ra2 18.b5–/+) 16.Nd4 Bd4 (16...c5 17.Ba6 cd4 18.Bb7 Qb7 (< 18...Bb7 19.ed4 Qc7 20.Qb3=) 19.ed4 Qc6–/+) 17.cd4+= (< 17.ed4 Ra7 18.Qb4 Qb4 19.cb4 Ra2–/+) 17...Ra7 18.Qc3 Ba2 19.Ra1 Bd5 20.0–0 0–0 21.d3 Nf6 22.Ra7 Qa7 23.Ra1 Qb7 24.de4 Ne4 25.Qc2 Ng5 (25...Rb8 26.Ba3+=) 26.Ba6 Qb6 (26...Qb3 27.Qb3 Bb3 28.Bb7+=) 27.Bc4+/– c6 (27...Bc4 28.Qc4 Nf7 29.Rb1+/–) 28.Bd5 cd5 29.Rb1 Rb8 30.h3 Ne4 31.f3 Nf6 32.Kh2 (32.Qd2 Qc7+=) 32...Kf7 (32...Qb3 33.Qd2+=) 33.Qf2 Qb3 34.Qd2 Qa2 35.Qc2 Rb7 (35...Qc4 36.Qd1+=) 36.Kh1 Ke6 (36...Qb3 37.Qc1+=) 37.Qc8 Rd7 38.Qc1 Ke7 (38...Rb7 39.Kg1+=) 39.Ra1+/– Qc4 40.Qd2 Nh5 (40...Rb7 41.Rc1 Qa2 42.Rc2+/–) 41.Kh2 Qc8 (41...Rb7 42.Bc3+/–) 42.Bc3 (42.Rc1 Rc7+/–) 42...Kf7 (42...Rc7 43.Bb4+/–) 43.Bb4 (43.Ra5 Rc7 44.Bb4 Rc2+/–) 43...Qe8 (43...Kg8 44.Ra2+/–) 44.Ra6 (44.Ra3 Qe6+/–) 44...Qe6 45.Qc1 (45.Bc5+/–) 45...Re7 (45...Nf6!?+/–) 46.Qc6 (46.Bd6 Kg8+–) 46...Qe3 (46...Nf6 47.Bd6 Rd7 48.Be5 Qc6 49.Rc6+–) 47.Qd6 Qf4 48.Qf4 Nf4 49.Be7 Ke7 50.Ra7 (50...Kf6 51.Rh7+–) 1–0. b4_player (2225) – serginho2 (1900), GameColony.com, 2003.

5.Qf3 Nf6 =.

5.Qf3 Bg7 6.Nc3 (6.d4 e4 7.Qd1 Nf6 8.Nh3 Nc6 9.b5=; 6.a3 Nc6 7.Nc3 Nf6 8.Bb5 Bd7 9.Nd5=) 6...Ne7 (6...Nc6 7.a3 Nf6 8.Bb5 Bd7 9.Nd5=) 7.Bc4 (7.Nh3 Nd7 8.a3 a5 9.b5=) 7...e4 8.Qe2 (8.Qg3 Nbc6 9.a3 d5=) 8...d5+= 9.Bb3 0–0 10.0–0–0 (10.Nh3 a5 11.ba5 c5=) 10...a5 (10...Qd6 11.a3+=) 11.b5 Bc3 12.dc3 (12.Bc3? a4 13.Bc4 dc4 14.Qc4 Qd5 15.Qc7 Nd7–+) 12...a4 13.Bd5 Nd5 14.c4? (14.Qd2!? Qd7 15.Qd5 Qd5 16.Rd5–/+) 14...a3 (14...Qg5 15.cd5 Qg2–+) 15.Ba1 c6 (better is 15...Qg5!? 16.cd5 Qg2=) 16.cd5+/– cd5 17.Qd2 (17.Nh3 Be6+/–) 17...d4+= 18.ed4 (better is 18.Ne2!?+=) 18...Qd5+= 19.Qc3 Be6 (19...Qa2? 20.d5 Kf7 21.Nf3+–) 20.Ne2 (20.Qb3 Rc8 21.Qd5 Bd5+=) 20...Rc8+= (20...Qb5?? 21.d5 Qb2 22.Bb2 ab2 23.Qb2+–; 20...Qa2?? 21.d5! Qa1 22.Qa1+–) 21.Qb4 (21.Qb3!? Qb3 22.ab3 Bb3 23.Nc3+=) 21...Qa2–/+ 22.Bc3 Bc4 23.Nf4 Bb3! 24.Rd2 (24.Qb3 Qb3; 24.cb3 Qb2) 24...Ra4 25.Qe7?? (better is 25.cb3 Rb4 26.Ra2 Rc3 27.Rc2 Rcb3 28.Rc8 Kf7 29.Kc2–+) 25...Rc3 26.Qe8 Kg7 27.Kd1 (27.Qe7 Bf7 28.Kd1 Qb1 29.Ke2 Qb5 30.Ke1–+) 27...Qb1 28.Ke2 Bc4 (28...Qh1?! 29.Qe7 Kg8 30.Qe8 Kg7 31.Qe7 Kh6 32.Qh4 Kg7 33.Qe7=) 29.Nd3 ed3 (29...ed3 30.cd3 Bd3 31.Kf3 Bc4 32.Kf4 Qh1 33.Qe7 Bf7 34.Qe5 Kh6–+) 0–1. Diener,Rudolf – Gnirk,Hajo, corr ICCF EU/M75, 2001.

5.Qd1 Nf6

6.c4 Bg7 7.Be2 0–0 8.Nf3 c6 9.0–0 a6 (9...e4 10.Nd4=) 10.h3 (10.d4 e4 11.Nfd2 Be6=) 10...b5 (10...e4 11.Ne1=) 11.d3 Bb7 (11...e4 12.Nfd2=) 12.Qc2 (12.Qb3 bc4 13.Qc4 d5=) 12...c5 Black prepares the advance e4 (12...a5 13.d4 e4 14.Nfd2 ab4 15.cb5 cb5 16.Bb5=) 13.a3 (13.bc5 dc5 14.cb5 ab5 15.Qc5 Nbd7+/–) 13...e4 (13...bc4 14.dc4 Qb6 15.Rd1=) 14.Ng5 (14.Nfd2 cb4 15.ab4 bc4 16.dc4 a5+=) 14...Qd7= 15.de4 Ne4 (15...h6 16.Nf3 fe4 17.Nh4+=) 16.Bg7+= Kg7 (16...Qg7!? 17.Ne4 Be4+=) 17.Qb2 Rf6 (17...Kh6 18.Ne4 Be4 19.cb5 ab5 20.bc5 dc5+/–) 18.h4 (18.Ne4 fe4 19.bc5 dc5 20.cb5 ab5+/–) 18...h6 (18...cb4 19.ab4 bc4 20.Rd1+=) 19.Nf3 (19.Ne4 fe4 20.bc5 dc5 21.cb5 ab5+/–) 19...g5 (better is 19...bc4!? 20.Bc4 f4=) 20.hg5+/– hg5 21.Nbd2 (21.cb5 g4 22.Nh4 Qe6+/–) 21...Kg6 (21...bc4 22.Nc4 Ra7 23.bc5 dc5 24.Rab1+/–) 22.Ne4 (22.cb5 ab5 23.bc5 Nd2 24.Qd2 g4 25.Nh4 Kh5+–) 22...Be4 (22...fe4 23.Nh2 Qe7 24.bc5 dc5 25.cb5+/–) 23.Nd2 (23.cb5 Qe7+–) 23...Bc6 (23...bc4 24.Bc4 Bc6 25.bc5 dc5 26.Rfd1+/–) 24.Qc2 (24.bc5 dc5 25.Nf3 Qe7+/–) 24...Qh7 (24...Kg7 25.Rfc1+/–) 25.Bf3+= g4 (25...Bf3 26.Nf3 cb4 27.Nd4+=) 26.Bg4 Kg7 27.Bh3 (27.cb5 Rh6 28.Qc3 Kf7 29.f3 Rh1 30.Kf2 Qh4 31.Ke2 Bb5 32.Nc4 Rf1 33.Rf1 fg4 34.Kd2–/+) 27...Rh6?? (better is 27...Qh3! 28.gh3 Rg6 29.Kh2 Rg2 30.Kh1 Rf2 31.e4 Be4 32.Ne4 Rc2 33.Rf5 Kg6+–) 28.Qf5+– Rh3? (better is 28...Qf5 29.Bf5 bc4 30.Nc4 Bb5+–) 29.Qh3 Qh3 30.gh3 Nd7 31.f4 (31.Kh2 Ne5+–) 31...Kh6 (31...Rg8 32.Kf2+–) 32.Kh2 (32.Kf2 Rf8+–) 32...Rg8 (32...Re8 33.Rae1+–) 33.Rg1 Nf6 (33...Re8 34.Rg3 bc4 35.Rag1+–) 34.Rg8 Ng8 35.Rg1 (35.bc5!? dc5 36.Rc1 b4+–) 35...Nf6 36.f5 Ne4 (36...Be8 37.bc5 dc5 38.Rc1+–) 37.Ne4 Be4 38.Rg6 Kh5 (38...Kh7 39.cb5 ab5 40.Rg5+–) 39.Rd6 (better is 39.cb5 ab5 40.Rd6 c4+–) 39...Bf5 (39...bc4 40.Re6 Bd3 41.Ra6+–) 40.Ra6 (40.cb5 cb4 41.ba6 b3+–) 40...bc4 (40...cb4 41.ab4 bc4 42.b5+–) 41.Rc6 (better is 41.Ra5!? cb4 42.Rf5 Kg6+–) 41...cb4 42.ab4 Bd3 (42...c3 43.Rc3 Bd7 44.Kg3+–) 43.b5 c3 44.Rc3 (better is 44.b6 Ba6+–) 44...Bb5 1–0. GuestHTNP – GuestWDSK, freechess.org, 2016.

6.c4 Bg7 7.Nf3 0–0 8.Be2 Na6 (8...c5 9.d4+=) 9.a3 c6 (9...c5 10.b5 Nc7 11.d3=) 10.0–0 Kh8 11.Qc2 Nc7 12.d3 Be6 13.Ng5 Bg8 14.f4 Ng4 15.Bg4 fg4 16.Nd2 (16.Ne4 d5 17.Nc5 b6=) 16...h6 (16...d5 17.Rae1 ef4 18.Bg7 Kg7 19.Qb2 Qf6 20.Qf6 Kf6–/+) 17.Nge4+= d5 18.Ng3 ef4 19.Bg7 Kg7 20.ef4 dc4 21.Nc4 Qd4 22.Kh1 Bc4 23.dc4 Rf4 24.Rf4 Qf4 25.Qd3 Rf8 (25...Ne6 26.Rf1 Qd4 27.Qe2=) 26.Rf1 Qe5 27.Qd7 Kg8 28.Rf8 (28.Qg4 Rf1 29.Nf1 Qf6 30.Qc8 Qf8 31.Qf8 Kf8=) 28...Kf8 29.Qd1 (29.Nf1 Qf4 30.Kg1 Ne8+=) 29...Ke7 0–1. GuestMGRF – GuestFNZN, freechess.org, 2017.

6.d4 ed4 7.Bd4 Bg7 8.c3 c5 9.Bf6=.

6.Be2 Be6 7.Nf3 Bg7 8.0–0 Nc6 9.b5=.

6.Nf3 Nbd7 7.Be2 b6 (7...Bg7 8.0–0=) 8.c4 (8.0–0 Bg7+=) 8...Bb7 (8...c5 9.d4 ed4 10.ed4 cb4 11.0–0=) 9.d3 (9.0–0 Bg7+=) 9...Bg7 (9...c5 10.a3=) 10.Nbd2 (10.0–0 0–0=) 10...Qe7 (10...a5 11.b5=) 11.0–0 d5 (11...c5 12.a3=) 12.Re1 (12.b5!?=) 12...e4+= 13.Nd4 h5 (13...Qb4 14.Rb1 Qe7 15.de4 fe4 16.cd5 Bd5 17.Qc2+=) 14.a3 (14.Nb5 Kd8+=) 14...h4 (14...c5 15.bc5 Nc5 16.de4 de4 17.Qc2=) 15.h3 (better is 15.Nb5 Qd8 16.Rc1+=) 15...g5?? (better is 15...c5 16.bc5 Nc5=) 16.cd5 (16.Nf5 Qf8+–) 16...Bd5 (16...Qe5 17.Ne6 Qb2 18.Nc4+–) 17.Nf5 Qf7 18.Ng7 (18.Rc1 ed3 19.Bd3 g4 20.Rc7 Kd8+–) 18...Qg7 19.de4 Be6 20.Nc4 (20.Rc1 c5+–) 20...0–0–0 (20...g4 21.Bg4 Rg8+–) 21.Qa4 Kb8 22.Rad1 (22.Qc6 Qf7 23.Rac1 Rhf8+–) 22...Qe7? (better is 22...g4 23.Bf6 Qf6 24.Bg4 Bg4 25.hg4 Qe6+–) 23.Ne5 (23.Qc6 Bc4 24.Bc4 Rhf8+–) 23...Ne5 24.Be5 Rd1 25.Rd1 (worse is 25.Qd1 Rf8+–; 25.Bd1?! Rf8 26.Qc2 g4 27.Bf6 Rf6 28.Bg4 Bg4 29.hg4 Rg6+–) 25...Rd8 (25...Rf8 26.f4 Bc8+–) 26.Rd8 Qd8 27.Bf6 Qf6 28.Qe8 Kb7 29.e5! Qe5 (29...Qf7 30.Bf3 c6 31.Qc6 Kb8 32.Qa8 Kc7 33.Qa7 Kc8 34.Qa8 Kc7 35.Qc6 Kd8 36.Qb6 Kc8 37.Qe6 Qe6+–) 30.Bf3 Ka6 31.Qa4 Qa5 32.ba5 (32.b5) 32...b5+– 33.Qd4 Bc8 (33...g4 34.Bc6 Bf5 35.Qd5 Bd3 36.Qd3 gh3 37.Qb5) 34.a4 (34.Qc5 Bb7 35.a4 c6 36.Bc6 Bc6 37.Qc6 Ka5 38.Qb5) 34...Bb7 35.ab5 (35.Qc5 c6 36.Bc6 Bc6 37.Qc6 Ka5 38.Qb5) 35...Ka5+– 36.Bb7 (36.Qa7 Kb4 37.Qb7 Kc5 38.Qd5 Kb4 39.Qg5 Kb3 40.Qh4 c6 41.Bd1 Kb2 42.Qb4 Kc1 43.Qb3 Kd2 44.Qc2 Ke1 45.Qe2) 36...Kb5 37.Qd5 Ka4 (37...Kb4 38.Qg5 c5 39.Qh4 Kb5 40.Qf6 Kb4 41.Ba6 Kb3 42.Qf7 Kb2 43.Qa7 c4 44.Bc4 Kc3 45.Qd4 Kc2 46.f4 Kc1 47.Kf2 Kc2 48.Qd3 Kc1 49.Qb3 Kd2 50.Qb2 Kd1 51.Bb3) 38.Bc6 (38.Qc4 Ka3 39.Qc3 Ka2 40.Bd5 Kb1 41.Bb3 a6 42.Qc2 Ka1 43.Qa2) 38...Ka3 39.Qc5 (39.Qd3 Kb4 40.Qd4 Kb3 41.Ba4 Ka2 42.Qc4 Ka1 43.Qc2 a6 44.Bb3 g4 45.Qa2) 39...Kb2 (39...Kb3 40.Bd5 Kb2 41.Qb4 Kc1 42.Be4 g4 43.Qc3 Kd1 44.hg4 h3 45.Bf3) 40.Qc4 (40.Ba4 Ka1 41.Qc2 a6 42.Bb3 g4 43.Qa2) 40...Ka1 (40...a5 41.Qd4 Kc2 42.Ba4 Kb1 43.Qc3 c5 44.Bc2 Kc1 45.Be4 Kd1 46.Bf3) 41.Qb3 (41.Qc1 Ka2 42.Bd5) 41...g4 (41...a6 42.Qa3 Kb1 43.Be4) 42.Bd5 gh3 43.Qa2 1–0. GuestPCYW – ExodusudoxE, freechess.org, 2016.

6.Nf3 Bg7 7.Be2 0–0 8.0–0 e4 9.Nd4=.

5.Qd1 Bg7

6.Bc4 Nf6 7.Nf3 Nbd7 8.0–0 Nb6 9.Bb3 a5 10.b5?? (better is 10.ba5 Ra5 11.d4=) 10...a4–+ 11.c4 ab3 12.Qb3 Be6 13.d3 Qd7 14.a4 d5 Black prepares the advance e4 (14...e4 15.Nfd2–+) 15.Nbd2? (better is 15.Ne5!? Qe7 16.c5–/+) 15...dc4–+ 16.dc4 e4 17.Nd4 Bf7 18.a5 Nc8 19.Qb4 Nd6 20.N4b3 0–0 21.Nc5 White plans a6 21...Qe7?? (better is 21...Qd8–+) 22.Nb7+= Nfe8 (22...Nd5 23.cd5 Bb2 24.Ra4–/+) 23.Bg7= Kg7 24.a6 Qf6 25.Nd6 Nd6 26.c5 Nb7 27.Ra3 (27.ab7 Ra1 Pinning (27...Ra1 Deflection)) 27...Nd8 28.Qd4 (28.Rb1 Ne6+=) 28...Qd4 (28...Ne6 29.Qf6 Kf6 30.Rc1=) 29.ed4 Ne6 0–1. GuestJXQP – ExodusudoxE, freechess.org, 2017.

6.d4 Nd7 7.Nd2 Qe7 8.Be2 Ngf6 9.a3 =.

6.Be2 Be6 7.Nf3 g5 8.0–0 g4 9.Ne1 =.

6.Nf3 Be6 7.c4 Nd7 8.d3 Qe7 9.Be2 Nh6 10.Qc2 Rg8 11.e4 0–0–0 12.d4 fe4=+ 13.Qe4 ed4 14.Nd4 Bd4 15.Qd4=+ Nf5 16.Qa7? Bc4–+ 17.Nc3 Rde8?? 18.0–0 Be2–+ 19.Rfe1 Qg5?? 20.Nd5?? Bf3–+ 21.g3 Qh5 22.Nc7 Qh3 23.Qa8 Kc7 24.Rac1–+ Bc6 25.Rc6 bc6 26.Qa7?? Kc8 27.Qa8 Nb8 28.Rc1 Kd7 29.Qb7+= Ke6?? 30.Re1+– Kd5 31.Qf7 (31.Qf7 Re6 32.Qe6) 1–0. bentengutama – nbarletta (1850), net–chess.com, 2002.

6.Nf3 Be6 7.Be2 Nd7 8.0–0 Qf6 9.Nc3 =.

3.e3 Bf5

4.a3 Be7 5.c4 Bf6 6.Nf3 Bg4 7.Be2 Nc6 8.0–0 h5 9.d4+= e4 10.Nfd2+– Nh6 11.Nc3 0–0 12.h3 Be2 13.Qe2 Nf5 14.Nde4 g6 15.Nf6 Qf6 16.Nb5 Rac8? 17.d5 Ne5 18.f4 a6 19.fe5 de5 20.Nc3 Qg5 21.Ne4 Qh6 22.Qf3 f6 23.g4 hg4 24.hg4 Nh4 25.Qh1 Qe3 26.Nf2?? Qg3 27.Qg2 Qg2 0–1. Slavisa2 – chessdv8, Live Game Caissa's Web, 2004.

4.b5 Nf6 5.Nf3 c6 6.Nc3 Be7 7.d4 ed4 8.Nd4 Bg6 9.Bd3 Bd3 10.Qd3 0–0 11.bc6 Nc6 12.0–0 Qc7 13.Nf5 Rfd8 14.Nd5 Nd5 15.Qd5 Bf8 16.Qc4 Qa5 17.Qg4 g6 18.Nd4 Bg7 19.Nc6 bc6 20.Bg7 Kg7 21.Qd4 Qe5 ½–½. Cortese – J Fernandez, email IECG 1996.

4.Nc3 Nf6 5.Qf3 Qc8 6.e4 Bg4 7.Qd3 Nc6 8.a3 Qe6 9.Nd5 Rc8 (9...Kd8) 10.f3 Nd5? (10...Bh5) 11.ed5 1–0. Wall,Bill – Killian, chess.com, 2011.

4.Bc4 c6 5.Ne2 (5.Nf3 Nd7=) 5...d5 (5...Qh4 6.Bb3 Qb4 7.f4+=) 6.Bb3 (6.Ng3 Bg6 7.Be2 Qc7=) 6...Nd7 7.a3 Bd6 (7...a5 8.ba5 Qa5 9.f4+=) 8.0–0 Qc7 (8...Qh4 9.f4 Nh6 10.c4 dc4 11.Bc4+=) 9.f4= Nh6 10.Nbc3 (10.c4 dc4 11.Bc4 a5=) 10...0–0–0 (10...0–0 11.h3 a5 12.ba5+=) 11.b5 Nc5 12.bc6 Qc6? (better is 12...bc6 13.Na4 Nb3 14.cb3 f6+=) 13.Bd5+– Qc7 (13...Qe8 14.Rb1+–) 14.Nb5 (14.Rb1 Qd7+–) 14...Qb6 15.c4 a6? (better is 15...Nd3!? 16.Nd6 Qd6+–) 16.Nd6 (16.fe5?! Bc7 17.Nbd4 Bd3+/–) 16...Rd6 (16...Qd6 17.fe5 Qd7 18.Bd4+–) 17.Be5 Rg6 (17...Rd7 18.d4 Ne4 19.Bg7+–) 18.Nd4 (18.d4 Nd7+–) 18...Rf8 (18...Bd3 19.f5 f6 20.fg6 fe5 21.Ne2 Qg6 22.Ra2+–) 19.Nf5 Nf5 20.Rb1 Qd8 21.Qc2 Nh4 (21...Qd7 22.e4 Nh4 23.g3+–) 22.d4 Nd7 (22...f6 23.f5 fe5 24.fg6 Rf1 25.Rf1 Nd7 26.gh7 ed4+–) 23.Bb7 1–0. Vahl,Laurens – Huijgens,Mark, Hengelo op U12, 1997.

4.Bc4 Nd7 5.Qf3 (5.Nc3 Ngf6=) 5...Bg6 6.Qb7 (6.Nc3 Ngf6=) 6...Rb8 7.Qc6?? (better is 7.Qa6 Rb6 8.Qa7 Rb4 9.Bb3=) 7...Rb4–+ 8.Bb3 (8.Bc3 Ne7 9.Qa6 Nb8 10.Bb4 Na6 11.Ba6 c6–+) 8...Be4 9.Qc3 Rb3! 10.ab3 (10.ab3 Bg2 Combination; 10.cb3 Bg2 Combination; 10.Qb3 Bg2 Combination) 10...Bg2 11.Ra7 Bh1 (11...c5 12.Ne2 Bh1 13.Ng3–+) 12.Rc7 (12.Qc7 Qc7 13.Rc7 Be7–+) 12...Qg5 (12...Ne7!? 13.Ra7–+) 13.Rc8? (13.Ne2 Ngf6 14.Ng3–+) 13...Ke7 14.Ne2 Ngf6 (better is 14...Bb7 15.Rc7 Qg2 16.Ng3–+) 15.Qc7 Bf3?? (15...Qg2 16.d4 Ne4–+ (16...Qh2?? 17.de5 de5 18.Ba3 Ke6 19.Nd4 ed4 20.Qh2+–)) 16.Ba3+/– Ke6? (better is 16...Ne4 17.Nbc3 Kf6 18.Qd7 Nc3 19.Rf8 Rf8 20.Qd6 Kf5 21.Ng3 Kg4 22.Qd7 f5 23.Bf8 Ne4 24.Bg7 Ng3 25.fg3 e4+–) 17.Nbc3?? (better is 17.Ng3 Ne4 18.Re8 Kf6 19.Qd7+–) 17...Qg2 (17...Kf5 18.Rd8 Qg2 19.d3–+) 18.d4 (better is 18.d3 Kf5 19.Rd8–+) 18...Ng4?? (better is 18...Kf5 19.Rd8 Be2 20.Ke2 Kg6–+) 19.Re8 (better is 19.Kd2 Nf2 20.Re8 Kf6 21.Qd7=) 19...Be7?? (better is 19...Kf6 20.Qd7 Qf2 21.Kd2 Qe3 22.Ke1 Kg6 23.de5 Qf2 24.Kd2 Ne5+=) 20.Re7?? (better is 20.Qd6! Kf5 21.e4 Kg5 A) worse is 22.Qd7 Qf2 23.Kd2 Re8 24.Be7 Kh6 25.Bg5 Kg5 26.Qe8 Qe3 27.Ke1 f6+= (27...ed4?! 28.Qd8 Nf6 29.Qd4 Qd4 30.Nd4+=); B) 22.Qe7 Ndf6 23.Rh8 Qf2 24.Kd1 Qg1 25.Kd2 Qe3 26.Ke1 Qf2 27.Kd1 Qg1 28.Kd2 Qe3 29.Ke1 Qf2=) 20...Ke7–+ 21.Qd6 (21.Bd6 Ke6 22.Kd2 Qf2 23.d5 Kf6 24.Qd7 Qe3 25.Ke1–+) 21...Ke8 (better is 21...Kd8 22.Nd1 Nh2–+) 22.Qe7 1–0. Valencia,Carlos Antonio (1885) – Gomez,Manuela (1650), IRT Championship Municipal de Mayores A, 2016.

4.Bc4 Ne7 5.Nf3= Bg6 6.0–0 f5 7.Nc3 e4 8.Nd4+/– d5 9.Bb3 Qd7 10.Ba4 c6 11.f3 b5 12.Bb3 Nc8 13.Nce2 Bb4= 14.Nf4 Bf7 15.a3 Bc5 16.d3 Nd6=+ 17.de4 fe4 18.fe4 Ne4 19.Qe1 0–0 20.Nf3 Be6 21.Ne5 Qe7 22.Ne6 Qe6 23.Rf8–/+ Kf8 24.Qf1 Kg8 25.Nd3?? Nd2 26.Qf4?? Nb3 27.Nc5?? Nc5 28.Qg3 g6 29.Bd4 Ne4 30.Qf4 Nd7 31.Rf1 Rf8 32.Qc7 Rf1 33.Kf1 Qf5 34.Ke1 Qf2 35.Kd1 Qd2# 0–1. ronnieg (2670) – AsimovZZ (2545), fics, 2001.

4.Bc4 Bg6 5.Nf3+= Nc6 6.a3 (6.b5 Na5 7.Be2 Nf6+=) 6...Nf6= 7.d3 Be7 8.Nbd2. Nemsadze,Daviti – Antonioudakis,Georgios, European Youth Chess Championship U8, 2016.

4.d3 Nd7 5.Be2 Ngf6 6.Nf3 Bg4 7.Nbd2 g6 8.0–0 Bg7 9.a3 Nh5 10.c4 Nhf6 11.Qc2 Qe7 12.Rfe1 Bh6 13.h3 Bh5 14.a4 (14.g4 Ng4 15.hg4 Bg4+/–) 14...c6 (14...g5 15.c5+=) 15.Qb3 (15.g4 Ng4 16.hg4 Bg4+/–) 15...0–0 (15...g5 16.Qd1+=) 16.b5 (16.g4 Ng4 17.hg4 Bg4+/–) 16...Rfb8 (16...g5 17.Qd1 Bg6 18.Nb3+=) 17.Qc2 (17.g4 Ng4 18.hg4 Bg4+/–) 17...d5? Black intends e4 (17...g5 18.e4+=) 18.Ba3 (18.g4!? Bg4 19.hg4 Ng4 20.Rec1+–) 18...Qe6+/– 19.Bb2 Bg7 (19...Qe7 20.g4 Bg4 21.hg4 Ng4 22.cd5 cd5 23.Rec1+–) 20.d4 (better is 20.g4!? Bg4 21.hg4 Qg4 22.Kh1+/–) 20...e4= 21.Ne5 (21.Ng5 Qf5 22.Bh5 Qg5=) 21...Be2+= 22.Nd7 Bd3 23.Nc5?? (better is 23.Nf6 Bf6 24.cd5 Qd5 25.Qb3–/+) 23...Bc2–+ 24.Ne6 fe6 25.Rec1 Bd3 26.Nb3 (26.Ba3 cb5 27.cb5 Rc8–+) 26...Nd7 (26...Bc4!? 27.Nc5–+) 27.Nd2 c5 28.f3 a6 29.fe4 de4 (worse is 29...Be4 30.Ne4 de4 31.a5–+) 30.Ba3 (30.a5 ab5 31.cb5 Bh6–+) 30...Rf8 (better is 30...cd4 31.Ra2–+) 31.Nb3 b6 32.Bb2 (32.dc5 bc5 33.Nc5 Nc5 34.Bc5 Ba1 35.Ra1 Rfc8–+ (35...Bc4?! 36.Bf8 Kf8 37.Rb1–+)) 32...a5 (32...Bh6 33.dc5 Be3 34.Kh2 Bc1 35.Rc1 bc5 36.Ba3–+) 33.Ra2 (33.Bc3 Bh6 34.Bd2 Rac8–+) 33...Rf7 (33...Bh6 34.Re1 Bc4 35.Ra3–+) 34.dc5 (34.Nd2–+) 34...Bb2 (better is 34...Bh6 35.Re1 Bc4–+ (worse is 35...bc5 36.Nd2–+; worse is 35...Nc5 36.Nc5 bc5 37.Be5–+)) 35.Rb2 Nc5 36.Nc5 bc5 37.Rf2 (37.b6 Rb7–+) 37...Rf2 38.Kf2 Rf8 39.Ke1 (39.Kg3 Kf7–+) 39...Bf1 40.Rd1 (40.Rc2–+) 40...Bd3 41.Kd2?? (41.Rc1 g5 42.Kd2–+) 41...Rf2–+ 42.Kc3 Rg2 43.b6 (43.Rd2 Rd2 44.Kd2 Bc4 45.Kc3–+) 43...Rf2 (better is 43...Rc2 44.Kb3 Rc4–+) 44.Rd2 Rf8 45.Rb2 Rb8 46.Rb5 Kf7 47.b7 (47.Ra5 Rb6 48.Rc5 Ke7–+) 47...Ke8 48.Rc5 Rb7 49.Ra5 Rc7 50.c5 Kd7 51.Kb4 h5 (51...Kc6 52.h4–+) 52.Ra6 (52.Ra8–+) 52...Ba6 (52...Ba6 53.Kc3 Rc5 54.Kb4 Rg5–+) 0–1. Goldmund,Heike – Feilcke,Samuel, Rostock op, 2009.

4.d3 h6 5.a3 Nf6 6.Nf3 Bh7 7.Be2 Nc6 8.0–0 Qd7 9.b5 Ne7 10.Nc3 a6 11.d4 (11.ba6!? Ra6 12.d4+=) 11...e4= 12.Nd2 ab5 13.Bb5 c6 14.Be2 d5 15.f3 (15.Ncb1!?=) 15...ef3 16.Bf3 Nf5 17.Qe2 Bd6 18.Bg4 (18.Qf2 Qc7 19.g3 Kd8+=) 18...0–0 (18...Ng4!? 19.Qg4 Ne3 20.Qd7 Kd7 21.Rf7 Ke6 22.Rb7 Nc2–/+) 19.Bh3+= g6 (better is 19...Bh2 20.Kh2 Qc7 21.Kg1 Ng3+=) 20.g4+/– Ne7? (better is 20...Ne3 21.Qe3 Ng4 22.Qh6 Nh6 23.Bd7 Rfd8+=) 21.Rf6+– Qc7 (21...Qd8 22.Rf3+–) 22.Qf2 Kg7 23.Rf3 Ng8 (23...f5 24.gf5 gf5 25.Ne2+–) 24.e4 Rae8 25.e5 (25.ed5!? cd5 26.Rf1 f6 27.Nd5 Qc2+–) 25...Be7 26.Rf1 c5 (26...f6+–) 27.Rf7 Rf7 28.Qf7 Kh8 29.Qe8 cd4 30.Nd5 Qc5 31.Ne7 d3 32.Rf2 Qe7 33.Qe7 Ne7+– 34.Rf7 (34.Rf7 Kg8 35.Re7 Kf8 36.Rh7 dc2 37.e6 Ke8 38.Ne4 b6 39.Nd6 Kf8 40.e7 Kg8 41.Rh8) 1–0. Wall,Bill – Habiboss, chess.com, 2009.

4.d4 ed4 5.ed4 (5.Bd4 A) 5...c5 6.Bc3 (6.Bb5 Nc6 7.Bc6 bc6 8.bc5 dc5= 9.Bc3=) 6...cb4 7.Bb4 Be7 8.Nf3 Nc6 9.Bc3=; B) 5...Nc6 6.Bb5 Nge7 7.c4 Bd7 8.a3 a5 9.ba5=) 5...Nf6 (5...d5 6.a3 a5 7.b5 Nf6 8.Bd3 Bd3 9.Qd3+=; 5...Qe7 6.Be2 d5 7.a3 Be4 8.Kf1 a5 9.b5=) 6.Nd2 (6.d5 Qe7 7.Ne2 Nbd7+= 8.Nbc3 Nb6 9.Qd4+=; 6.Bd3 Bd3 7.Qd3 d5 8.Qb5 Nbd7 9.Ne2+=) 6...d5 7.b5 (7.Qe2 Be7 8.Qb5 Nc6–/+ 9.a3–/+; 7.a3 Bd6 8.Qe2 Qe7 9.Qe7+=) 7...c6 (7...Bd6 8.Qe2 Be6 9.Ngf3–/+) 8.Ngf3+= Bd6 9.bc6 (9.Qe2 Be7+=) 9...Nc6 10.Bb5 0–0 11.0–0 Qb6 12.Bc6 (12.c4 Bd3 13.Re1 Na5–/+) 12...bc6 (12...Qc6 13.Rc1–/+) 13.Qc1 (13.Nb3 Rae8+=) 13...Rfe8–/+ 14.c4 Rab8 15.Bc3 Bf4 16.c5 (16.Qa3 Re2–/+) 16...Qc7 (16...Qa6 17.Re1–/+) 17.Re1 Ne4 18.g3 Bh6 19.Qa3 Nd2 (19...Re7 20.Qa5–/+) 20.Nd2 (20.Bd2 Bd2 21.Nd2 Qd7+=) 20...Bg5 21.Nf3 Bf6 22.Qa6 (22.Bd2 Qd7+=) 22...Be4–/+ 23.Ne5 Be5 24.de5 Rb5 25.Qa3 Qe7 26.Bd4 Reb8 27.Qe3 Rb4 28.f3 (28.Rad1!?+=) 28...Bf3!–/+ 29.e6 (29.Qf3 Rd4) 29...Be4 30.Be5 Re8 31.ef7 (31.Bg7 f6 (31...Kg7?! 32.Qc3 Qf6 33.Qb4=; 31...Qe6?! 32.Bd4–/+) 32.Bh6 Rb2–/+) 31...Qf7–+ 32.Rf1 Qg6 (32...Re5?? 33.Rf7 Kf7 34.Qc3 Rb1 35.Rb1+–) 33.Bd6 h5 (better is 33...Rb2 34.Rf2 Bb1–+) 34.Qe1? (better is 34.Rf2–/+) 34...Rb2–+ 35.Rf2 Rf2?? (35...Bb1 36.Qf1 Rf2 37.Qf2 Qd3 38.Rb1 Qb1 39.Kg2 Qe4 40.Qf3 Qe2 41.Qf2