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TESTD775 Release 2020-10-01
Send your 1.b4 games to me, please. Thank you! /Marek
Marek Trokenheim's homepage
(c) Marek Trokenheim

1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Be7

(...)

6.a4 Bd7 7.c4 (7.Be2 0–0=) 7...0–0 8.Qc2 h6 (8...a6 9.Ng5 Re8 10.cd5 ed5 11.Nc3=+) 9.h3 (9.Be2 a6=) 9...Be8 (9...a6 10.Be2=) 10.Na3 (10.Be2 a6=) 10...Nbd7 (10...a6 11.Be2=) 11.Be2 Nb6 (11...Bd6 12.cd5 ed5 13.0–0=) 12.Rd1 (12.0–0 Bd6+=) 12...a6= 13.0–0 (13.d3 ab5 14.ab5 Na4=) 13...ab5 14.ab5 dc4 (14...Nc4 15.Bc4 dc4 16.Qc4=) 15.Bc4 (15.Ne5 Ra5=) 15...Nc4 16.Qc4 Qb6 (16...Qa5 17.Rb1=) 17.Rb1 (17.Ra1 Bd7=) 17...Ra5 Increasing the pressure on the isolated pawn on b5 (17...Bd7 18.Rfc1=) 18.Bc1 (18.Qd3 Qc7=) 18...Nd5 (18...Bd7 19.Qc2 Qa7 20.b6=+) 19.Rd1 (19.Qb3 Qd8=+) 19...Nc7 The pressure on the isolated pawn grows (19...Nb4 20.Bb2 Bb5 21.Nb5 Qb5 22.Qg4=) 20.d4 (20.Qb3!? Ra8 21.d4=) 20...Bb5=+ 21.Nb5 Rb5 (21...Nb5? 22.Bd2 Nd6 23.Rb6 Nc4 24.Ba5 Na5 25.Rb5+–) 22.dc5 (22.Ra1 cd4 23.Nd4 Rd8=+) 22...Bc5 (22...Qc5 23.Qc5 Bc5 24.Bb2–/+) 23.Rb5 Qb5 24.Qb5 (24.Qc2 Rc8–/+) 24...Nb5 25.Ne5 (25.Rd7 b6–/+) 25...Nc3 26.Re1 (26.Rd2 b5–/+) 26...Rd8 (26...b5 27.Bb2 b4 28.Bc3 bc3 29.Rc1=+) 27.Kf1 (27.Bb2 Ne4–+) 27...Rd1 (better 27...Bb4 28.Bb2 Ne4–+) 28.Rd1–/+ Nd1 29.Nd3 (29.Ke2 Nc3 30.Kd3–/+) 29...b6 (29...Be7 30.Ke1 Nc3 31.Bb2–/+) 30.Nc5=+ bc5 31.Ke2 Nc3 32.Kd3 Na4 (32...Nb5 33.e4=) 33.Kc4 Kf8 (33...f5 34.Ba3=) 34.Ba3 Attacking the isolated pawn on c5 34...Ke7? (better 34...Ke8=) 35.Kb3+– (35.Bc5?! Nc5 36.Kc5 f6=) 1–0. Fritz,Harry – Petzold,R, corr DDR–I–4, 1961.

6.c4 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3 Be7).

6.c4 h6 7.Be2 Nbd7 8.Qc2 b6 9.d4 Qc7 10.Nbd2 Bb7 11.0–0 Rc8 12.cd5 Nd5 13.Rac1 Ba8 14.dc5 bc5? (better 14...Bc5!? 15.Qa4 0–0+=) 15.Bg7+– Rg8 16.Qh7 (16.Bh6?! Rg6 17.Bf4 Nf4 18.ef4 Qf4+=) 16...N7f6 17.Qh6 Qb7 (17...Ng4 18.Qh7 Ngf6 19.Bf6 Nf6 20.Qc2+–) 18.h3 Bf8? (better 18...Nh5 19.Qh5 Rg7 20.Qh8 Bf8+–) 19.Bf8 Rf8 20.e4 Ng8 21.Qg5 Ndf6 (21...Nb6 22.Rc5 Rc5 23.Qc5+–) 22.Rc5 Ne4 (22...Rc5 23.Qc5 Ne7+–) 23.Ne4 Rd8 24.b6! Qe4 (24...ab6 25.Bb5; 24...Qb6 25.Nf6 Deflection (25.Bb5 Decoy)) 25.Bb5 Bc6 26.Bc6 (26.Rc6 Qc6 27.Bc6 Rd7 28.b7 f6 29.Qg7 Rff7 30.b8Q Ke7 31.Qbf8) 26...Qc6+– 27.Rc6 Ne7 28.Rc7 Nd5 (28...Rd7 29.b7 f6 30.Qh5 Rf7 31.b8Q Rd8 32.Qh8 Rf8 33.Qb5 Rd7 34.Qd7 Kf7 35.Qh7) 29.Rd1 Rd7 (29...Rd6 30.Rd5! f6 31.Qg6 Rf7 32.Qf7 Kd8 33.Rd6) 30.Rc8 (30.Rc8 Rd8 31.Rd8) 1–0. GuestFQTS – GuestVWRL, freechess.org, 2018.

6.d3 Qa5 7.Nbd2 (7.Nc3 0–0+=) 7...Qb5–/+ 8.Be2?? (8.Rb1 Qa5–/+) 8...Qa5 (better is 8...Qb2 9.0–0 0–0–+) 9.0–0–/+ 0–0 10.c4 Qc7 11.cd5 ed5 12.e4 (12.Be5!? Qd7 13.Rc1–/+) 12...d4 13.Nc4 b5 14.e5 (14.Ncd2 Be6–+) 14...Nd5 15.Nd6 (15.Ncd2 Nc3 16.Bc3 dc3–+) 15...Bd6 16.ed6 Qd6 17.Qd2 Nd7 18.Qg5 (18.Rfe1 Bb7–+) 18...f6 19.Qd2 Bb7 20.g3 (20.Rae1 Rae8–+) 20...Rfe8 21.Rfe1 Ne5 22.Nh4 (22.Ne5 fe5 23.Rac1 Nf4–+) 22...Ne7 (better is 22...Qc6 23.f3 g5–+) 23.Qf4 (23.f4 Qc6 24.Kf2 Nf5 25.fe5 Nh4–+) 23...Qd5 (23...Qc6 24.Qe4 Qb6 25.Qf4–+) 24.f3 (24.Qe4 Qd7 25.Qf4–+) 24...g5 25.Qf6 gh4 26.Qh4 (26.Bc1 Rf8 27.Qe7 Nf3 28.Bf3 Qf3 29.Qg5 Kh8 30.Qe5 Rf6 31.Qf6 Qf6 32.Bf4–+) 26...Nf3 27.Bf3 Qf3 28.Qg5 (28.Qh3 Rf8 29.Qe6 Rf7 30.Re4 Qf2 31.Kh1 Qb2 32.Rf1–+) 28...Kh8 0–1. Ramm – Weller, Hauenstein Pfalz, 1991.

6.Bd3 0–0 7.Nc3 Qc7 8.Ng5 (8.Rb1!?=+) 8...h6–/+ 9.Na4?? (better 9.Nh3–/+) 9...hg5–+ 10.g3 (10.h4 gh4 11.Rh4 Nbd7–+) 10...e5 11.Ba3 (11.h4 g4–+) 11...Bd7 (11...e4 12.Be2 Bh3 13.Bb2–+) 12.c3 (12.0–0 a6 13.b6 Qc6–+) 12...e4 13.Bc2 (13.Be2 a6 14.b6 Qc6–+) 13...Bb5 14.Bb3 (14.h4 g4 15.h5 Nbd7–+) 14...Bd7 15.0–0 (15.c4 dc4 16.Bc2 b5–+) 15...Bh3 (15...b5 16.Nc5 Bc5 17.Bc5 Qc5 18.d4 ed3 19.Qd3–+) 16.Re1 (16.c4 Bf1 17.Qf1 dc4 18.Qc4 Nbd7–+) 16...b5 17.d3 (17.d4 Bg4 18.Qc1 ba4 19.Ba4 Qa5–+) 17...ba4 18.Ba4 (18.Bc2 Bg4 19.Qc1 ed3 20.Bd3 Nc6–+) 18...Bg4 19.Qc1 ed3 20.Qd2 Qa5 21.Kg2 Qa4 22.Qb2 Bf3 23.Kf3 Qe4 0–1. Tiedemann,Marcel (1750) – Rohde,Matse (2225), remoteschach.de, 2002.

6.Be2 0–0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 0–0 6.Be2 c5 (without 7.bc6!)).

6.Be2 b6 7.0–0 Bb7 (7...0–0 8.Ne5=) 8.c4 (8.Ne5 0–0=) 8...dc4 9.Bc4 0–0 10.Nc3 Nbd7 11.d4 Qc7 12.d5 Nd5 13.Nd5 ed5 14.Bd5 Nf6 (14...Rfd8 15.Bb7 Qb7 16.Qc2=) 15.Be5 Qd7 16.Bb7 Qb7 17.Qe2 Rfd8 18.h3 (18.Rfd1 Qe4=) 18...Ne4 (18...a6 19.Rfd1=) 19.Rad1 Bf6 20.Bf6 (20.Rd8 Rd8 21.Rd1 Rd5 22.Bf6 Nf6=) 20...Nf6 21.Ne5 Rd1 (21...Qe4 22.Rd8 Rd8 23.Nc4=) 22.Rd1+= Ne4? (better is 22...Qe4 23.Nc4 Qe6+=) 23.Rd7+– Qd5?? (23...Qb8 24.Nf7 Nf6 25.Rd8 Qd8 26.Nd8 Rd8+–) 24.Rd5 (24.Rd5 Nf6 25.Rd6+–) 1–0. pierre – tqipw, internet, 2010.

6.Be2 Qb6 7.Nc3 Bd7 (7...0–0 8.a4=) 8.0–0 c4 9.d3 (9.a4 0–0=) 9...Bb5 10.Nb5 Qb5 11.Rb1 Qc6 (11...cd3 12.Bd3 Qd7 13.c4=) 12.dc4 dc4 13.Bf6 Bf6 14.Nd4 Bd4 (14...Qc5!?+=) 15.Qd4 (15.ed4?! Qc8=) 15...0–0 (15...Qc7!? 16.Qg7 Rf8+–) 16.Bf3+– (16.Bc4?! Na6=; 16.Qc4?! Qc4 17.Bc4 b6=) 16...Qd7 (16...Qc7 17.Bb7 Nd7 18.Ba8 Ra8 19.Qe4+–) 17.Bb7 (17.Bb7 Qd4 18.ed4+–; 17.Rb7?! Qd4 18.ed4 Na6+–; 17.Qc4?! Nc6+=) 1–0. marr3 – tqqzy, internet, 2010.

6.a4 a5

7.d3 Nbd7 8.g3 (8.Be2 0–0=) 8...Bd6 (8...0–0 9.Bg2=+) 9.Bg2 Rb8 (9...e5 10.0–0=+) 10.e4 (10.c4 0–0=) 10...d4 11.Na3 (11.Nbd2 e5=) 11...e5 12.Nc4 Bc7 13.c3 (13.0–0 0–0=) 13...b6 (13...0–0 14.0–0=) 14.0–0 (14.cd4 ed4 (worse 14...cd4 15.Ba3+–) 15.0–0 0–0=) 14...0–0= 15.cd4 ed4 16.e5 (16.h3 Qe7=) 16...Ng4 (16...Nd5 17.Re1 Bb7 18.Rc1=) 17.Re1 Re8 Increases the pressure on e5 18.Nd4 Nde5 (18...Nge5 19.Nc6 Nc6 20.Re8 Qe8 21.bc6+=) 19.Nc6 (19.Nf3 f6+=) 19...Nc6= 20.Re8 (20.Bc6 Re1 21.Qe1 Be6=) 20...Qe8 21.bc6 The passed pawn on c6 will quickly become a dangerous weapon (21.Bc6 Bd7+=) 21...Be6 22.Na3 (22.Qf3 b5 23.ab5 Rb5=) 22...Be5+= 23.Be5 Ne5 24.c7 Rc8 25.d4 cd4 26.Qd4 (better 26.Nb5 Qd7 27.Rc1+=) 26...Nd7? (better 26...Bh3! 27.Qd6 Bg2 28.Kg2 Nd7+–) 27.Nb5+– Nc5 28.Rd1 h6?? (28...Qf8 29.Qd8! Bd7 30.Rd7 Nd7 31.Qd7 Re8+–) 29.Nd6 (29.Nd6 Qf8 30.Nc8 Qc8 31.Qd8 Kh7 32.Bd5+–) 1–0. pcmvr – petre, net–chess.com, 2018.

7.Be2 b6 8.Nc3 Bb7 9.d3 Nbd7 10.0–0 Qc7 11.h3 h6 12.Nb1 0–0–0 (12...0–0 13.c4=+) 13.Nbd2= Kb8 (13...e5 14.d4 ed4 15.ed4=) 14.c4+= Ka7 15.Rc1 Rhg8 16.cd5 ed5 17.Nd4 Nb8 18.Nf5 Ne8 (18...Qd7 19.Ne7 Qe7 20.Re1+–) 19.d4 c4 20.Ne7 Qe7 21.e4! Nc7 (21...de4 22.Rc4 Deflection) 22.ed5+– Nd5 23.Rc4 (23.Nc4?! Nf4 24.Bf3 Bf3 25.Qf3 Ne2 26.Kh2 Nc1 27.Rc1 Qb7+=) 23...Rge8 24.Bf3 f5 (24...Nf4 25.Qb3+–) 25.Qc2 Rc8?? (better 25...Qg5+–) 26.Bd5 Rc4 27.Bc4 (27.Nc4?! Bd5 28.Ne5 Qg5+–) 27...Rc8 28.Qf5 Nd7 29.Qd3 (29.Rd1 Nf6+–) 29...Nf6 30.Ba3 Qc7 31.Re1 Ka8 (31...Rd8 32.Re7 Rd7 33.Qe3+–) 32.Re7 Qf4 33.d5 Rd8 34.d6 Qg5 (34...Kb8 35.Be6 Ka8 36.Nc4+–) 35.f3 (35.Nf3 Qf4 36.Rb7 Kb7+–) 35...Ne8 (35...Nd7 36.Ne4 Qh5 37.Be6+–) 36.Ne4 Qh4 (36...Qe7 37.de7 Rd3 38.Bd3 Bc8+–) 37.Qe3 Nf6 38.Qb6 Qe1 39.Kh2 Rb8 (39...Rd7 40.Nf6 Bc6 41.Qc6 Kb8 42.Nd7 Ka7 43.Bc5) 40.Bc5 Ne4 (40...Qh1 41.Kh1 Ne4 42.Qa7) 41.Qa7 1–0. Janek – Henry, internet, 2016.

6.a4 b6

7.Be2 0–0 8.0–0 Bb7 9.d3 Nbd7 10.Nbd2 Qc7 11.c4 a5 12.Rc1 e5 13.cd5 Bd5 14.e4 Bb7 (14...Be6 15.Ng5+=) 15.Nc4+= Increases the pressure on e5 15...Bd6 16.Qd2 Rfe8 17.Nh4 (worse 17.Nd6 Qd6 18.Qg5 h6=) 17...Re6 18.Nd6 (18.Nf5 Bf8+–) 18...Qd6+= 19.Nf5 Qf8 20.Bd1 g6 (20...Ree8 21.Qg5+–) 21.Nh6 Kh8 22.Qg5 Ng8 23.Ng8 Kg8 24.Bb3 Rf6 (24...Qe7 25.f4 Qg5 26.fg5+–) 25.f4 Rf4 26.Rf4 ef4 27.Qf4 Re8 28.Rf1 Re7 29.h4 h5 30.g4 hg4 (30...Bc8+–) 31.h5 gh5 (31...Be4 32.de4 c4 33.Bc4 Re6 34.hg6 Qc5 35.Kg2 Qe7 36.gf7 Kf8 37.Be6 Qe6 38.Ba3 Nc5 39.Qb8 Qc8 40.Qc8 Kg7 41.f8Q Kh7 42.Qcf5) 32.Qg5 (32.Qg5 Kh7 33.Qh5 Qh6 34.Rf7 Rf7 35.Qf7 Qg7 36.Qg7) 1–0. pcmvr (2875) – yatsysa (2525), net–chess.com, 2009.

7.Be2 Bb7 8.0–0 Nbd7 9.Na3 0–0 10.c4 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.a4 Nbd7 10.Na3).

7.Be2 Nbd7 8.d4 0–0 (8...c4 9.Ba3=) 9.0–0 a5 (9...c4 10.Ba3=) 10.Nbd2 Bb7 11.c3 (11.c4 cd4 12.Bd4 Qb8=) 11...Rc8 12.Rc1 Bd6 (12...Ne4 13.Ne4 de4 14.Nd2=) 13.h3 (13.c4 cd4 14.Nd4 Qe7=) 13...c4 14.Re1 (14.Qc2 Re8+=) 14...e5 (14...Ne4 15.Ra1+=) 15.de5= Ne5 16.Ne5 Be5 17.Nf3 (17.Ba3 Re8=) 17...Bb8 (17...Bd6 18.Nd4+=) 18.Nd4 (18.Ba3 Re8=) 18...Ne4 19.Bg4 Qc7 20.f4 (20.g3 f5 21.Bf3 Qe7=) 20...Rcd8+= 21.Ba3 Rfe8 22.Rc2 g6 (22...Nc5 23.Rd2+=) 23.Bf3 Nc5 24.Rd2 Nd3 25.Ree2 Nc5 26.Bc5 Qc5 27.Nc2 Bf4–/+ 28.Kf2 Bb8 29.Nd4 Qd6 30.Qg1 Re5 31.Nc2 Rde8 32.Rd4 Rf5 33.g4–/+ Rfe5 34.Qg2 Qf6 35.Kg1–/+ Qe6 36.Rd1 Qd6 37.Kh1 Qf6 38.Rd4 Qg5 39.Red2–/+ Re3 40.Ne3 Re3 41.Qf2 Rc3–+ 42.Rd5? Rc1 43.Kg2–/+ Bd5 44.Bd5 Qf4 45.Qf4+= Bf4 46.Rd4 g5 47.Rc4 Rd1 48.Be4 Rd2 49.Kf1 Ra2 50.Bg2 Be3 51.Be4+= Kg7 52.Bc2 Ra3 53.Kg2 Bf4 54.Rc6 Rg3 55.Kf1 Be3 56.Rc3 Bf4 57.Rg3= Bg3 58.Kg2 ½–½. De Visser,Arno – Roet, 1982.

6.a4 Nbd7

7.c4 0–0 8.Be2 dc4 9.Na3 Nb6 (9...c3!? 10.Bc3 b6=) 10.Nc4+= Nc4 11.Bc4 b6 12.0–0 Bb7 13.Ne5 Rc8 14.a5 Bd6 (14...ba5 15.d3=) 15.ab6 ab6 16.f4 Bb8 (16...Ra8 17.Nc6 Qd7 18.Bf6 gf6 19.Qg4 Kh8 20.Qh4+–) 17.Ng4 (17.Qe2 Be5 18.Be5 Qd7+–) 17...Ne8 (17...Ne4 18.d3 Nd6 19.Ne5+=) 18.f5 (18.Qc2 Qh4 19.Ne5 Nf6+=) 18...ef5 (18...Bd5!? 19.Bd5 Qd5+=) 19.Rf5+– Qh4? (19...Kh8!?+–) 20.Ra4+– Be4?? (better 20...Kh8 21.Bf7 Qd8+–) 21.Rf7! Rf7 (21...Rf7 22.Bf7 Double attack (22.Be6 Decoy)) 22.Bf7 Kf7 (22...Kh8 23.Re4 Bh2 24.Kf1+–) 23.Re4 Bh2 (23...Qg5 24.Qf1 Kg8 25.Qc4 Kf8 26.Be5 Be5 27.Ne5+–) 24.Kf1 Kf8 (24...Kg8 25.Nf6!! Qf6 26.Bf6 Nf6+–) 25.Qf3 (25.Qf3 Kg8 26.Qf5+–) 1–0. Nikishin,Sergey (2050) – Badalyan,Vazgen, Chess Tournament, 2012.

7.g3 b6 (7...0–0 8.Bg2=+) 8.Bg2= Bb7 9.0–0 0–0 10.d3 (10.c4 Qc7=) 10...Qc7 11.Nbd2 (11.Qe2 Rfe8=) 11...Rfe8 (11...a6 12.Qe2=) 12.Rc1 (12.c4 a6=) 12...e5 (12...c4 13.Nb1=+) 13.Nh4 (13.c4 d4=+) 13...Bf8 (13...a6=+) 14.e4 (14.c4 d4=) 14...Rad8 (14...c4 15.dc4 dc4 16.Bc3–/+) 15.Qe2 (15.ed5 Bd5 16.Bd5 Nd5+=) 15...g6 (15...c4 16.dc4 de4 17.Ne4 Ne4 18.Be4 Be4 19.Qe4=+) 16.Rce1 (16.ed5 Nd5 17.Rfe1 Bg7=) 16...de4 (16...c4 17.dc4 d4 18.Nb3=+) 17.de4 (17.Ne4 Ne4 18.Be4=) 17...Bh6 (17...c4 18.Bc3 a5=+) 18.f4?? (better 18.Nc4+=) 18...Nf8?? (better 18...ef4 19.e5 fg3 20.hg3 Bg2 21.Ng2 Bd2 22.Qd2 Nf8–/+ (worse 22...Ne5 23.Be5 Re5 24.Qf4+–)) 19.Nc4+– 1–0. Beisheev,Kanat (1900) – Usubaliev,Ermat, Memorial Yurtaev, 2013. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 e6 4.b5 c5 5.e3 Be7 6.a4 Nbd7)

6.c4 Bd7

7.a4 0–0 8.d4 b6 9.Be2 Ne4 10.Nc3 (10.cd5 Bf6 11.de6 Be6+–) 10...f5 (10...Nc3!? 11.Bc3 dc4+=) 11.cd5+– ed5 (11...Bc8!?+–) 12.dc5+– Bc5?? (better 12...Nc3 13.Bc3 Be6+–) 13.Qd5 Kh8 14.Ne4 (worse 14.Qa8 Bb4 15.Rc1 Qc7+–) 14...fe4 15.Qe4 (worse 15.Qa8 ef3 16.Bf3 Bb4 17.Kf1 Qc7+–) 15...Bf5 (15...Na6 16.ba6 Bf5 17.Qh4+–) 16.Qa8 Bb4 (16...Qe7 17.Qd5 Bb4 18.Kf1+–) 17.Kf1 Bd3 (17...Qe7 18.Qd5+–) 18.Qa7 Be2 (18...Rg8 19.Rd1 Be2 20.Ke2+–) 19.Ke2 Qd5 (19...Qd7 20.Qd7 Nd7+–) 20.Qg7 1–0. Intruder – iniciant3, internet free game, 2018.

7.a4 a6 8.Nc3 0–0 9.d4 (9.Be2 dc4 10.Bc4 ab5 11.ab5 Ra1 12.Qa1 Ne8=) 9...cd4 10.Nd4 (10.Qd4 ab5 11.cb5 Bd6=) 10...Bb4 (better 10...Qa5=+) 11.f3? (11.Qb3 Qa5 12.Nc2 Bd6=) 11...e5 (better 11...dc4!? 12.Nc2 Bc3 13.Bc3 Nh5–/+) 12.Nc2= Ba5 (better 12...Bc3 13.Bc3 Qc7=+) 13.Bd3?? (better 13.cd5!? Qb6 14.e4+=) 13...e4 (better 13...Qc7!?–+) 14.Be2=+ ef3 (14...dc4 15.Na3=+) 15.Bf3 ab5 (15...Qc7 16.0–0 dc4 17.Nd5 Nd5 18.Qd5=) 16.cb5 Ne4 (16...Qc7 17.Qd4=+) 17.Be4 (17.Qd4 Qh4 18.g3 Qg5 19.Be4 de4=) 17...de4 (better 17...Qh4!? 18.g3 Qe4=+) 18.0–0= f5? (better 18...Bc3 19.Bc3 Qg5=) 19.Qd5+– Kh8 (19...Rf7!? 20.Ne4 Qe7+–) 20.Qb7 Qg5?? (20...Na6 21.Ne4 fe4 22.ba6 Rg8+–) 21.Qa8 Bc7 Black prepares the advance f4 (21...Bc3 22.Bc3 Rc8 23.Ra3+–) 22.Qe4 h5 (22...Rc8 23.Qf3 Qh6 24.Qh3 Qh3 25.gh3+–) 23.Qf3 f4 (23...Ba5 24.Nd4+–) 24.Ne4 (better 24.Nd5!? Bg4 25.ef4 Bf4+–) 24...Qe5 (24...Qg6 25.ef4 Rf4+–) 25.Be5 (25.Be5 Bg4 26.Qg4 hg4 27.Bc7+–) 1–0. jaddwarrior (2025) – icam (1800), ChessWorld.net, 2012.

6.Be2 a6

7.0–0 ab5 8.Bb5 Bd7 9.a4 (9.Nc3 0–0=) 9...Bb5=+ 10.ab5 Ra1 11.Ba1 Nbd7 (11...Qa5 12.Nc3=) 12.d3 Qa5 13.Nc3 0–0 14.Qb1 (14.Qd2 Ra8=+) 14...Ra8 (14...Ne8 15.Qb3=+) 15.Ne2= Qa2 16.Bc3 (16.Bb2 Ne8=+) 16...Qb1 17.Rb1 Ra2 (17...Ne8 18.Kf1=+) 18.Ra1 Ra1 (18...Rc2 19.Kf1 d4 20.ed4=) 19.Ba1 Ne8 20.Ne5 (20.Be5 f6 21.Bg3 Bd6=+) 20...Ne5=+ 21.Be5 Nd6 (21...Bd6 22.f4=) 22.b6 (22.Bd6 Bd6 23.c4 dc4 24.dc4 f5=) 22...Nc8 23.Bc7 Bd6 (23...Kf8 24.h3=) 24.e4 (24.c4 dc4 25.dc4 Kf8=) 24...d4 (24...de4 25.de4 Kf8 26.Nc3=) 25.e5 Bc7 26.bc7 Kf8 27.Kf1 (27.Ng3 Ke8=) 27...Ke8 28.Ng3 Kd7 29.Ne4 b6 30.Ng5 Kc7 31.Nf7 h6 32.g4 (32.h4 Kd7 33.Nh8 Ke8–/+) 32...Kd7 33.h4 (better 33.Nh8!?=+) 33...Ke8–+ 34.Nh8 Ne7 35.f4 (35.h5 Nc6 36.Ng6 Nb4–/+) 35...Kf8 (better 35...Nd5!?–+) 36.h5–/+ Kg8 (36...Nd5!? 37.Ng6 Kf7–/+) 37.Ng6=+ ½–½. pierre – Underfire, ChessWorld.net, 2005.

7.0–0 c4 8.ba6 Na6 9.d3 cd3 10.cd3 0–0 11.Nbd2 Bd7 12.Qb1 b5 13.Rc1 b4 (13...Bd6 14.e4 Nh5 15.g3=) 14.a3 (14.Bf6 Bf6 15.d4 Qa5=) 14...Rb8 (14...ba3 15.Ba3 Ba3 16.Ra3+=) 15.Be5+= Rb7 16.d4 ½–½. marekt – jesus1, ChessWorld.net, 2003.

6.a4 0–0

7.c4 a5 8.Be2 Ne4 9.d3 (9.Nc3 Bf6+=) 9...Nd6= 10.Nbd2 Bf6 (10...b6 11.cd5 ed5 12.e4=) 11.Qb3 dc4 (11...Nd7 12.Bf6 Nf6 13.0–0=) 12.dc4 (12.Nc4 Nc4 13.dc4 Nd7+=) 12...Nd7 (12...Bb2 13.Qb2 b6 14.0–0=) 13.e4 (13.Bd3 Qc7=) 13...Bb2= 14.Qb2 f5 15.ef5 Rf5 (15...ef5!? 16.0–0 b6=) 16.Bd3+– Rf4 (16...Rh5 17.0–0+–) 17.Qc2 Nf8 18.0–0 Nf5 (18...Qc7 19.g3 Rf6 20.Rad1+–) 19.Be4+– Nd4 (19...Qc7 20.g3 Rg4 21.Rfe1+–) 20.Nd4 Qd4 (20...cd4 21.c5 Ng6 22.g3+–) 21.g3 (21.Rad1 Ng6+–) 21...Rf2 22.Rf2 Qa1 23.Kg2 Ra7? (23...g6+–) 24.b6?? (better 24.Nb3!? Qe5 25.Qd3 Nd7 26.Bh7 Kh8+–) 24...Ra8 (24...Ra6 25.Nf3 Rb6 26.Ng5+=) 25.Qd3 (25.Nf3!? g6+–) 25...Qd4+– (25...Qa4?? 26.Qd8 Qe8 27.Qe8 a4 28.Rf8) 26.Qf3 Qf6 27.Qh5 (27.Qg4 Qe7 28.Nf3 e5+–) 27...Qe7 28.Rf8 (better 28.Qe5!? Ng6 29.Bg6 hg6 30.Nf3+–) 28...Kf8= 29.Qh7 (better 29.Nf3=) 29...Ra6?? (better 29...Qg5 30.Qh8 Ke7=+) 30.Bg6+– Qd6 31.Qh8 Ke7 32.Qe8 (32.Qg7 Kd8 33.Qg8 Qf8 34.Qf8 Kd7 35.Be8 Kd8 36.Bc6) 32...Kf6 33.Ne4 (33.Ne4 Ke5 34.Qf7 Qd7 35.Qf4 Kd4 36.Qf2 Kc4 37.Qc2 Kb4 38.Qb2 Kc4 39.Qc3 Kd5 40.Qc5) 1–0. Bulcourf,Carlos (2070) – Pradines,Emmanuel (1965), 16th IRT Jose Rubinstein, 2016. (=1.Nf3 d5 2.b4 Nf6 3.Bb2 e6 4.b5 c5 5.e3 Be7 6.a4 0–0)

7.c4 a6 8.Qc2 Nbd7 9.Be2 dc4 10.Bc4 ab5 11.Bb5 b6 12.0–0 h6 13.d4 Bb7 14.Nbd2 Nd5 15.Rfd1 Rc8 16.Qd3 Nb4 17.Qe2 Bf6 18.Nc4 Bc6 19.dc5 bc5 20.Bf6 Qf6 21.Bc6 Rc6 22.a5 Rd8 23.Rab1 Nd5 24.Qb2 Nc3 25.Qb7 Nd1 26.Qc6 Nc3 27.Rf1 Qe7 28.a6 Nb8 29.Qb6 Nd5 30.Qa5 Nc6 31.Qb5 Qc7 32.Qc5 Ra8 33.Ra1 Ncb4 34.Qc7 Nc7 35.a7 Nba6 36.Nd4 Ra7 37.Nd6 Ra8 38.e4 Re8?? 39.N4b5 Nb5? 40.Nb5?? Nc5= ½–½. Jernselius,Kjell (1855) – Patola,Eero (1935), Gibraltar ENG, Open, 2012.

7.c4 Ne4 8.d3 Ng5 9.Ng5 (9.Nbd2 d4=) 9...Bg5 10.Nd2 (10.d4 Bf6=) 10...f5 (10...d4 11.Qf3=+) 11.h4 (11.d4 Bf6=) 11...Bf6=+ (worse 11...Bh4 12.Qh5 Bf6 13.Qh7 Kf7 14.d4+–) 12.Bf6 Qf6 (worse 12...gf6 13.cd5 Qd5 14.Rc1+–) 13.h5 f4 (13...a6 14.h6 g6 15.Rb1=+) 14.e4 (14.ef4 a6=) 14...de4 (14...a6 15.b6=+) 15.Ne4= Qd4 (15...Qe5 16.h6=) 16.h6 (16.Ra2 a6=) 16...g6 17.Be2 (17.Ra3 Nd7=) 17...e5 (17...a6 18.0–0=) 18.Bf3 Bf5 (18...Nd7 19.0–0+=) 19.0–0 (better 19.Ng5 Qc3 20.Ke2+=) 19...Qd8? (better 19...Nd7+=) 20.Nc5+– Qb6? (20...Nd7 21.Nb7 Qh4 22.Re1+–) 21.Ne4 (better 21.Bb7 Qc5 22.Ba8+–) 21...Nd7 22.Qb3 (22.a5 Qd4+–) 22...Kh8 (22...Qc7 23.c5 Kh8 24.Rfc1 Be4 25.Be4+– (25.de4?! Nc5 26.Qc3 b6=)) 23.a5 Qe6 (23...Qd4 24.Qb4 Be4 25.de4+–) 24.Qa2 (24.a6 b6 25.Ng5 Qf6 26.Ba8 Qg5+–) 24...Rab8 (24...Rad8 25.Qa3+–) 25.Rfc1 (25.a6 Be4 26.Be4 Nc5+–) 25...Be4+– 26.Be4 Nc5 27.Bd5 Qf5 (27...Qg4 28.Qa3 f3 29.Bf3+–) 28.Rd1 Qg5 (28...Qf6 29.Qb2+–) 29.Qb2 Rbe8 (29...f3 30.g3+–) 30.f3 (30.d4 f3 31.Bf3 Rf3 32.dc5 Rf4+–) 30...Qh6 (30...Qf6!?+–) 31.d4+– Nd7 (31...Ne6 32.de5 Rf5 33.a6+–) 32.Bb7 Rf5 (32...Qg7 33.b6 ab6 34.a6 (34.ab6?! Rb8 35.Ra7 ed4+–) 34...ed4 35.a7+– (35.Rd4?! Re2 36.Qc3 Re3=)) 33.de5 (better 33.Bc6!? Qg7 34.b6+–) 33...Ne5+– 34.Re1?? (34.Bc6 Qg7 35.Qe2+– (35.Be8 Nf3 36.gf3 Qb2–+)) 34...Rh5 (34...Qg7 35.Re5 Rfe5 36.Be4=+) 35.Be4 (35.Qd4!?+–) 35...Rh1= 36.Kf2 Qh4 37.Ke2 Re1?? (better 37...Qh2 38.Qe5 Re5 39.Rh1 Qg2 40.Kd3 Qf2=+) 38.Re1+– Qh2 (38...Kg7 39.Qd4 Re7 40.b6 ab6 41.ab6+–) 39.Kd1+– Kg8?? (better 39...Qh5+–) 40.Bd5 Kf8 41.Qe2 (better 41.Qd4 Qh5 42.Qf4 Qf5 43.Qh6 Ke7 44.Qh7 Kd8+–) 41...Qh4 42.Qb2?? (better 42.b6 ab6 43.a6+–) 42...Qd8?? (better 42...Qe1! 43.Ke1 Nd3 44.Kd2 Nb2–+) 43.Re5+– Re5 (43...Qd7 44.Re8 Ke8 45.b6 ab6 46.ab6+–) 44.Qe5 g5 (44...Qd7 45.Kc1 Qf5 46.Qf5 gf5 47.b6 ab6 48.ab6 h6 49.b7 Kg7 50.b8Q Kg6 51.Qd6 Kg7 52.Qe7 Kg6 53.Bf7 Kg7 54.Be6 Kg6 55.Qf7 Kg5 56.Qf5 Kh4 57.Qg4) 45.Qh8 (better 45.c5 Qd7 46.c6 Qd8+–) 45...Ke7 46.Qh7 Kd6 47.Qg6 (47.Qa7!? Qh8 48.Qb6 Ke5+–) 47...Kc5 48.b6! ab6 49.Qb6 (better 49.Qc6 Kd4 50.Qb6 Qb6 51.ab6+–) 49...Qb6 50.ab6 Kb6 51.Kc2 Kc5 52.Kd3 Kd6 53.Ke4 Kc5 (53...Ke7 54.Kf5+–) 54.Kf5 Kd4 55.Kg5 Ke3 56.c5 Kf2 57.c6 Kg2 58.Kf4 (58.Kf4 Kh2 59.c7 Kh3 60.c8Q Kg2 61.Qc2 Kf1 62.Bc4 Kg1 63.Kg3 Kh1 64.Qd1; 58.c7 Kh2 59.Kf4 Kh3 60.c8Q Kg2 61.Qc2 Kf1 62.Bc4 Kg1 63.Kg3 Kh1 64.Qd1) 1–0. croach – jjrizzo, net–chess.com, 2017.

7.Be2 a6 8.Na3 ab5 9.Nb5 Nc6 10.0–0 Bd7 11.c4 Nb4 12.Ne5 Bb5 13.ab5 Ra1 14.Qa1 Qc7 (14...dc4 15.Nc4 Qd5 16.Qa7=) 15.Rc1+= Bd6 16.Nf3 Ne8 17.d4 cd4 (better 17...Qe7+–) 18.c5+– Be7 19.ed4 Bd8 (19...e5 20.de5 Bc5+–) 20.Qa4 Qa5 21.Qb3 b6 (21...Nc6 22.bc6 bc6+–) 22.Ra1 1–0. pcmvr – amikhlin (2410), net–chess.com, 2012.

7.Be2 b6

8.0–0 a5 9.d3 Bb7 10.Nbd2 Nbd7 11.c4 Qc7 12.Re1 Rac8 13.Bf1 (13.Rc1 e5=) 13...Rfd8 14.Qc2 e5 (14...dc4 15.dc4 Bd6 16.Bd3=) 15.g3 (15.cd5 Nd5 16.e4 Nb4=) 15...d4 (15...Bd6 16.Bg2=+) 16.Bg2 (16.ed4!? cd4 17.Nd4=) 16...Bd6 17.Re2 Rf8 18.Rf1 Ne8 (18...Rcd8 19.Ng5=) 19.Bc1 h6 (19...Rd8 20.Ba3=) 20.e4 f5 (20...Nef6 21.Nh4=) 21.ef5 Rf5 22.Nh4 (22.Ne4 Be7=) 22...Rf8 (22...Bg2 23.Kg2 Rf7 24.Rfe1=) 23.Bb7 Qb7 24.Ne4 Ndf6 (24...Kh7 25.f4=) 25.Ng6 (25.Nd6 Nd6 26.Ng6 Rfe8 27.Ne5 Re7+–) 25...Rf7 (25...Ne4!? 26.Nf8 Nc3+=) 26.Nd6+– Nd6 27.Ne5 Re7 28.Nc6 Re2 29.Qe2 Re8 30.Qf3 (30.Qd1+–) 30...Qd7 (30...Qf7!?+–) 31.Bh6!+– Nf5 (31...gh6 32.Qf4 Double attack (32.Qf6 Deflection; 32.Qf4 Decoy; 32.Qf6 Overloading)) 32.Bg5 Nh7? (32...Qe6 33.Bf6 Qf6 34.Qf4+–) 33.Bf4 (33.Bd8!? Rf8+–) 33...Rf8 (33...Qf7 34.Be5+–) 34.Qd5 (34.Ne5 Qd6 35.Re1 g5 36.Bg5 Ng5+–) 34...Qd5 35.cd5 Nf6 36.d6 Nd5?? (better 36...Re8+–) 37.d7 1–0. Morozevich,A – iKrush, ICC, 1999.

8.0–0 Bb7

9.d3 Nbd7 10.Nbd2 Qc7 11.c4 Rad8 12.a5 dc4 13.Nc4 Nd5 14.e4 Nf4 15.g3 Ng6 16.Qc2 f5 17.h4 f4 18.h5 fg3?? (better 18...Nh8 19.h6 gh6=) 19.hg6+– gf2 20.Rf2 hg6 21.Rg2 Kf7 22.Nfe5 Ne5 23.Be5 (worse 23.Ne5 Ke8 24.Rg6 Rh8 25.Rg7 Rb8+–) 23...Qd7 24.ab6 ab6 25.Ra7 (25.Nb6?! Qb5 26.Nc4 Kg8+–) 25...Bf6 26.Nd6 (26.Nd6 Ke7 27.Rb7 Be5 28.Rd7 Kd7 29.Nc4 Bd4 30.Kh2 Rh8 31.Kg3+–) 1–0. pcmvr (2845) – michelleke (2385), net–chess.com, 2011.

9.d3 Nbd7 10.Nbd2 Qc7 11.c4 e5 12.cd5 Nd5 13.Nc4 f6 14.Qb3 Kh8 (14...a6 15.h3 (15.g3 Kh8 16.e4 Nb4 17.Bc3 g6 18.Rfc1 a5 19.Bd2; 15.ba6 Ra6 16.g3 Kh8 17.Nh4 g6 18.a5 ba5 19.Ra5; 15.h4 ab5 16.ab5 Kh8 17.h5 Nb4 18.e4 Rfc8 19.Ne3; 15.Rfe1 Kh8 16.h4 Nb4 17.e4 Rg8 18.h5 g6 19.Ne3; 15.Rfc1 Kh8 16.h3 Rfb8 17.Nh4 g6 18.g3 ab5 19.ab5; 15.Rfd1 Kh8 16.h3 ab5 17.ab5 Nb4 18.e4 g6 19.Rdc1) 15...ab5 16.ab5 g6 17.Rfe1 Kg7 18.Nfd2 Rfd8 19.Bf3; 14...a5 15.Nfd2 (15.h3 Rf7 16.Nfd2 Nf8 17.Bg4 Rd8 18.Rfd1 Nb4 19.Ne4) 15...Kh8 16.Bf3 Nb4 17.h3 Bf3 18.Nf3 Qb7 19.e4) 15.g3 (15.a5 a6+= (15...Nb4 16.e4 a6 17.ba6 Ra6 18.ab6 Nb6 19.Na5) 16.ab6 N7b6 17.Na5 ab5 18.Nb7 Qb7 19.Qb5; 15.h3 a5 16.Nfd2 Nb4 17.Bf3 Ra7 18.Rad1 Raa8 19.Rfe1; 15.Rfe1 a6 16.g3 Nb4 17.e4 g6 18.Bc3 Kg7 19.Rec1; 15.Rfd1 a6 16.h3 Nb4 17.e4 g6 18.Rdc1 a5 19.Nh2; 15.h4 Nb4 16.h5 e4 17.de4 Be4 18.Rac1 Bd5 19.Rfd1; 15.Rfc1 a5 16.h3 Rae8 17.Re1 Nb4 18.Nfd2 f5 19.Bf3) 15...Rfd8 (15...a6 16.ba6 (16.e4 Nb4 17.Bc3 g6 18.Rfc1 a5 19.Bd2) 16...Ra6 17.a5= (17.Nh4 g6 18.a5 ba5 19.Ra5) 17...ba5 18.Ra5 Rb8 19.Ra6) 16.e4 (16.Nh4 g6 17.a5 Nb4 18.Bf3 Kg7 19.a6) 16...Nb4 17.a5 (17.Ne3 g6 18.Qf7 Bd6 19.Bc3) 17...a6 18.ab6 Nb6 19.Nfe5 (19.Nfe5 fe5 20.Be5=). pcmvr – pocketknife (2490), net–chess.com, 2010.

9.d3 Nbd7 10.Nbd2 Qc7 11.c4 e5 12.cd5 Nd5 13.Nc4 f6 14.Qd2 A) 14...Nb4 15.e4 a6 16.g3 ab5 17.ab5 g6 18.h4 Rfd8 19.h5; B) 14...a5 15.g3 (15.h4 Rf7 16.h5 Re8 17.Rac1 Ref8 18.g3 Nb4 19.e4; 15.h3 Rae8 16.Rfe1 Rf7 17.Ra3 Nb4 18.Rd1 Rd8 19.Nh4; 15.Rfe1 Rae8 16.h3 Rf7 17.Rac1 Rd8 18.Rf1 Nb4 19.Rfd1; 15.Rac1 Rf7 16.g3 Nb4 17.e4 Nf8 18.Nh4 Rd8 19.Qe3; 15.Rfc1 Nb4 16.e4 Rf7 17.Nh4 g6 18.Ne3 f5 19.Nf3; 15.Rab1 Rf7 16.Rfd1 Nb4 17.Rbc1 Rd8 18.h3 Nf8 19.Nh4) 15...g6 16.e4 Nb4 17.h4 Rf7 18.h5 Rg7 19.h6; C) 14...Rfe8 15.Nh4 (15.g3 Nb4 16.Nh4 e4 17.de4 Be4 18.f3 Bd5 19.e4; 15.h4 a6 16.h5 Rf8 17.Rfe1 Rf7 18.g3 Rff8 19.h6) 15...g6 16.g3 f5 17.e4 fe4 18.de4 Nb4 19.Bg4; D) 14...a6 15.h4 (15.h3 Rfe8 16.Nh4 g6 17.Rfe1 f5 18.Nf3 Bf6 19.Red1; 15.g3 Nb4 16.e4 g6 17.h4 ab5 18.ab5 Rfd8 19.h5; 15.Rfc1 Rfe8 16.Nh4 g6 17.Nf3 Kg7 18.h3 Rh8 19.Rf1; 15.Kh1 Nb4 16.e4 Rfd8 17.Qc3 Kh8 18.Kg1 ab5 19.ab5; 15.Rfd1 Nb4 16.h3 Bd5 17.Bc3 Be6 18.e4 Rfd8 19.ba6; 15.Rfe1 Nb4 16.h3 ab5 17.ab5 e4 18.de4 Be4 19.Red1) 15...g6 16.h5 gh5 17.g3 Nb4 18.e4 ab5 19.ab5.

9.d3 Nbd7 10.Nbd2 Qc7 11.c4 e5 12.cd5 Nd5 13.Nc4 f6 14.Re1 A) 14...a6 15.Qb3 Kh8 16.h3 ab5 17.ab5 Nb4 18.e4 g6 19.Bc3; B) 14...Kh8 15.Qb3 (15.h3 a5 16.Qb3 Nb4 17.Nfd2 f5 18.e4 fe4 19.de4; 15.a5 a6 16.ba6 Ra6 17.ab6 N7b6 18.Na5 Rfa8 19.Nb7; 15.g3 a6 16.Qb3 Nb4 17.e4 g6 18.Rec1 a5 19.Bc3; 15.h4 Nb4 16.e4 a6 17.Qb3 Bd6 18.Ne3 Rfe8 19.h5; 15.Qd2 a6 16.h4 h5 17.Rf1 Rfe8 18.Nh2 g6 19.Nf3) 15...a5 16.Nfd2 Nb4 17.h3 f5 18.e4 fe4 19.de4; C) 14...a5 15.g3 (15.Qb3 Rf7 16.Nfd2 Nb4 17.Bh5 g6 18.Bf3 Bf3 19.Nf3; 15.h4 Rae8 16.h5 Rf7 17.Qb3 Rd8 18.Nfd2 Nb4 19.h6; 15.h3 Rf7 16.Qb3 Rd8 17.Nfd2 Nf8 18.Bg4 Nb4 19.d4; 15.ba6 Ra6 16.Qb3 Kh8 17.Nh4 f5 18.Nf3 e4 19.Nfe5; 15.Rc1 Rf7 16.h3 Re8 17.Qb3 Nb4 18.e4 g6 19.Nh2; 15.Qd2 Rae8 16.h3 Rf7 17.Bd1 Nb4 18.e4 Nf8 19.Bb3) 15...Nb4 16.e4 Rf7 17.Qb3 Rd8 18.Rac1 Re8 19.Ne3; D) 14...Nb4 15.e4 (15.a5 e4 16.de4 Be4 17.Qb3 Kh8 18.Nfd2 Bg6 19.e4) 15...a6 16.Qb3 Kh8 17.h3 Rfe8 18.Rec1 Bd6 19.ba6.

9.d3 Nbd7 10.Nbd2 Qc7 11.c4 e5 12.cd5 Nd5 13.Nc4 f6 14.g3 A) 14...a5 15.ba6 (15.Qb3 Kh8 16.e4 Nb4 17.Nh4 g6 18.Rfe1 Rae8 19.Ng2; 15.e4 Nb4 16.Qb3 Rf7 17.Ne3 Re8 18.Bc3 g6 19.Nd2; 15.Nh4 g6 16.Qb3 Kg7 17.e4 Nb4 18.Rac1 Rad8 19.Ng2; 15.Re1 Nb4 16.e4 g6 17.Qb3 Kg7 18.Nh4 Rae8 19.Bg4; 15.Rc1 Nb4 16.e4 g6 17.Qb3 Rf7 18.Ne3 Re8 19.d4) 15...Ba6 16.Qb3 Kh8 17.Nce5 Ne5 18.Ne5 Ne3 19.fe3; B) 14...a6 15.ba6 (15.Qb3 Kh8 16.ba6 Ra6 17.Nh4 g6 18.a5 ba5 19.Ra5) 15...Ra6 16.Qb3 Kh8 17.Nh4 g6 18.a5 ba5 19.Ra5; C) 14...Kh8 15.e4 (15.Qb3 a6 16.ba6 Ra6 17.Nh4 g6 18.a5 ba5 19.Ra5; 15.Nfd2 Nb4 16.Qb3 f5 17.Bf3 Bf3 18.Nf3 e4 19.Nfe5; 15.a5 Nb4 16.Qd2 e4 17.de4 Be4 18.Qc3 Rad8 19.Ncd2; 15.Kg2 a6 16.Qb3 Nb4 17.e4 g6 18.Rfc1 a5 19.Re1; 15.Re1 Nb4 16.e4 a6 17.Qb3 g6 18.Rec1 a5 19.Re1) 15...Nb4 16.Ne3 g6 17.Qb3 a6 18.ba6 Ra6 19.Nd2; D) 14...Nb4 15.e4 (15.Qb3 Bd5 16.Nh4 Be6 17.Bf3 Rad8 18.e4 g6 19.Ng2; 15.a5 Bd5 16.e4 Be6 17.Nh4 ba5 18.Bg4 Bg4 19.Qg4) 15...a6 16.Qb3 Kh8 17.Rfc1 a5 18.Nh4 g6 19.Re1.

9.d3 Nbd7 10.Nbd2 Qc7 11.c4 e5 12.cd5 Nd5 13.Nc4 f6 14.h3 A) 14...Nb4 15.a5 (15.e4 a6 16.Qb3 Kh8 17.Bc3 g6 18.Rfc1 ab5 19.ab5) 15...ba5 16.Qa4 Bd5 17.e4 Be6 18.Rfb1 Rfd8 19.Qa5; B) 14...Rfe8 15.Qb3 a6 16.Nh4 g6 17.Bf3 Kg7 18.Na5 ba5 19.Bd5; C) 14...a6 15.Qb3 (15.Qd2 Nb4 16.e4 Rfe8 17.Bc3 Red8 18.Qb2 Kh8 19.Qb3; 15.ba6 Ra6 16.Qb3 Qc6 17.Rfe1 Qe6 18.a5 Rb8 19.Nh4) 15...Rfd8 16.h4 ab5 17.ab5 Nf8 18.g3 Kh8 19.e4.

9.d3 Nbd7 10.Nbd2 Qc7 11.c4 e5 12.cd5 Nd5 13.Nc4 f6 14.h4 A) 14...Rfb8 15.Qb3 (15.h5 a6 16.Qb3 ab5 17.ab5 Rf8 18.h6 Ra1 19.Ra1; 15.Qc2 a6 16.h5 Nb4 17.Qb3 Bd5 18.Nh4 Be6 19.Bf3) 15...a6 16.h5 ab5 17.ab5 Rf8 18.h6 gh6 19.Ra8; B) 14...a5 15.h5 (15.Qd2 g6 16.h5 gh5 17.g3 e4 18.de4 Nb4 19.Qc3; 15.Qb3 Rad8 16.h5 Rf7 17.Rfe1 Nf8 18.Nh4 Nb4 19.h6; 15.Rc1 Nb4 16.e4 Rf7 17.h5 Na2 18.Ra1 Nb4 19.h6; 15.ba6 Ra6 16.Qb3 Bc6 17.Nfd2 Kh8 18.Bf3 Rfa8 19.Ra3; 15.Qc2 Rf7 16.h5 Nb4 17.Qb3 e4 18.de4 Be4 19.Rac1; 15.Re1 Nb4 16.e4 h5 17.Qb3 Rf7 18.Ne3 c4 19.Qc3) 15...Rae8 16.Qd2 Rf7 17.Rac1 Rd8 18.Rfe1 e4 19.de4; C) 14...a6 15.Qb3 (15.Qd2 h5 16.Nh2 g6 17.Nf3 Kg7 18.Rfe1 Rfe8 19.Rec1; 15.ba6 Ra6 16.Qb3 Bc6 17.Nfd2 Kh8 18.Bf3 Nb4 19.Ra3) 15...a5 16.Nfd2 Kh8 17.Bf3 Nb4 18.Rfd1 Bf3 19.Nf3; D) 14...Rfe8 15.h5 (15.Qb3 a6 16.h5 ab5 17.ab5 Rf8 18.h6 Ra1 19.Ra1) 15...Nf8 16.h6 gh6 17.Nh4 Qd7 18.Bg4 Ne6 19.Nf5; E) 14...Rf7 15.a5 Nb4 16.Qa4 e4 17.de4 Be4 18.Nfd2 Bd3 19.Bd3; F) 14...Nb4 15.e4 (15.a5 e4 16.de4 Be4 17.Qb3 Bc2 18.Qc3 Be4 19.Nfd2; 15.h5 e4 16.de4 Be4 17.Qb3 Bc2 18.Qc3 Be4 19.Nfd2; 15.Qb3 Bd5 16.h5 a6 17.Bc3 Kh8 18.e4 Be6 19.ba6) 15...a6 16.Qb3 Rf7 17.ba6 Ba6 18.Ne3 Nc6 19.Nd5.

9.d3 Nbd7 10.Nbd2 Qc7 11.c4 e5 12.cd5 Nd5 13.Nc4 Bf6 A) 14.Qb3 a6 15.ba6 (15.Nfd2 ab5 16.ab5 h6 17.Ne4 Be7 18.Bf3 Rfd8 19.Ng3) 15...Ra6 16.Nfd2 Bc6 17.Bf3 Rfa8 18.h3 g6 19.Ra3; B) 14.Nfd2 B1) 14...Nb4 15.Qb3 (15.Rc1 a6 16.ba6 Ra6 17.Ne4 Bc6 18.Nf6 gf6 19.Ra1; 15.Rb1 a6 16.Ne4 Be7 17.ba6 Ra6 18.f4 ef4 19.Rf4; 15.Ne4 Be7 16.Qb3 Bd5 17.Rfd1 Rad8 18.Ra3 f5 19.Nc3; 15.a5 e4 16.de4 Bb2 17.Nb2 Rfe8 18.f4 ba5 19.e5; 15.Qc1 Be7 16.Qc3 a6 17.h3 g6 18.Bg4 ab5 19.ab5; 15.f3 Be7 16.a5 Bd5 17.Qa4 Bg5 18.Ne4 Bh6 19.Bc1) 15...Bd5 16.h3 Qb7 17.Ne4 Be7 18.Bf3 f5 19.Ned2; B2) 14...e4 15.Ne4 (15.de4 Bb2 16.ed5 Ba1 17.d6 Qd8 18.Qa1 Qf6 19.Qb1) 15...Bb2 16.Nb2 Ne5 17.Qb3 f5 18.Ng5 Rae8 19.Nc4; C) 14.e4 Nf4 15.a5 ba5 16.g3 Ne2 17.Qe2 a4 18.Ra4 Nb6 19.Ra3.

7.Be2 Nbd7

8.0–0 a6 9.c4 ab5 10.cb5 Nb6 11.d3 (11.a5 Nc4 12.Bc4 dc4=) 11...Bd6 12.a5 Nbd7 13.Bc3 (13.b6 Re8=) 13...e5 14.Nbd2 d4 (14...Re8 15.Qc2=) 15.Nc4 (15.ed4 ed4 16.Nc4 Bh2 17.Nh2 dc3=) 15...Bb8 16.Bb2 Nd5 17.Qb3 N7f6 18.Nfe5 Be5 19.Ne5 Be6 20.Qa3 de3 21.Bf3 ef2 22.Rf2 Qd6 (22...Re8 23.Rc2+–) 23.d4 b6? (better 23...Rfc8+–) 24.dc5+– bc5 25.Nc6 Bg4 (25...Ng4 26.Bg4 Bg4+–) 26.Rd1 Bf3 27.Qf3 (27.gf3?! Qe6 28.Qc5 Nf4+–; worse 27.Rf3 Qe6 28.Qc5 Qe2+–) 27...Qc7 28.Rd5 (28.Bf6?! Nf6 29.Qf4 Qb7+–) 28...Nd5 29.Qd5 Rae8 30.Be5 Qc8 31.a6 Re6 32.Rc2 f6 (32...Rfe8+–) 33.Ne7 Kh8 34.Nc8 Rc8 35.Qe6 (35.Qe6 Rd8 36.Rc5 h6 37.Rc8 Rc8 38.Qc8 Kh7 39.a7 h5 40.Qf5 Kg8 41.a8Q Kf7 42.Bd6 h4 43.Qf8) 1–0. Trkn – guest179, ICC, 2004.

8.0–0 b6 9.Na3!? Bb7 10.c4 Qc7 11.Rc1 Rac8 12.Qc2 (12.cd5 ed5 13.Nd4 (idea Nf5) 13...Ne4 14.Nf5 Ndf6) 12...Bd6 13.h3 Rfe8 (13...Ne4!?) 14.Rfd1 (14.cd5 ed5 15.Qf5) 14...Qb8 15.cd5 ed5 (withdraw) 0–1. Kukula – Gross, corr 3GMM½–06 1997–98.

8.0–0 b6 9.a5 ba5 10.Bc3 Bb7 11.d4 c4 12.Ba5 Qc8 13.Nc3 h6 14.g3 (14.Rb1 a6=) 14...Bd8 (14...a6 15.b6=+) 15.Bb4 Re8 16.Bd6 a5 17.Ba3 Bb6 18.Qd2 e5 19.Ne5 Ne5 20.de5 Re5 21.Rfe1 Qd7 (21...Qf5 22.Bd6 Re6 23.Ba3–+) 22.Red1 Ree8 (better is 22...Rae8!? 23.Bc4 Qc7=+) 23.Bc4+= Rad8 (23...dc4 24.Qd7) 24.Qe1 (24.Bf1 d4 25.ed4 Bd4=) 24...Qe6 25.Bb3 Qf5 26.Na4 Re6?? (better is 26...d4 27.Qe2 Bf3=+) 27.Nb6+– Rb6 28.Qa5 Re6?? (better is 28...Ne4 29.Rf1 Qg6+–) 29.Qd8 Kh7 (29...Re8 30.Qc7 Ng4 31.Rf1+–) 30.h4 (better is 30.Qc7 Ng4 31.Rf1 Ne5+–) 30...Re8 (30...Ne4 31.Rf1 Qh3 32.Qc7+–) 31.Qc7 Ba8 (31...Ne4 32.Qf4 Qf4 33.gf4+–) 32.Qf7 d4 (32...Qc8 33.Bb4 Qg4 34.Rd4+–) 33.Bf8 (33…Qg6 34.Ra7 Qf7 35.Rf7+–) 1–0. tromar (1605) – NN, GameColony.com, 2002.

8.0–0 b6 9.d3 Bb7 10.Nbd2 Qc7 11.c4 e5 12.cd5 Nd5 13.Qb3 Bf6 14.Rfc1 Rac8 15.Nc4 g6 16.Nfd2 Nb4 17.a5 Bg7 18.Bf3 Bf3 19.Nf3 Rfe8 20.Ng5 Re7 21.Ne4 Re6 22.Ra4 Qb8 23.Ncd6! Rd6 (23...Qd6 24.Nd6) 24.Nd6 Qd6 25.Rb4! Rd8 (25...cb4 26.Rc8) 26.Ra4 Nf6 27.ab6 ab6 28.Ra7 Qd5 29.Qc4 Qc4 30.dc4 Ne4 31.Ra6 Rd2 (31...Nd2 32.h3 Nb3+–) 32.Ra8 Bf8 33.Be5 Rf2 34.Bd6! Nd6 35.Kf2 (35.Kf2 Ne4 36.Kf3+–) 1–0. COMP – NN, 2003.

6.c4 0–0

7.Qb3 a6 8.Be5=+.

7.Qb3 b6 8.Be2 Bb7 9.d3 Nbd7 (9...a6 10.0–0=) 10.Nbd2 (10.0–0 Bd6=) 10...a5 (10...Bd6 11.0–0=) 11.ba6 (11.0–0 Bd6=) 11...Ba6 (11...Ra6 12.0–0=) 12.0–0 Qc7 13.a4 Rfb8 14.Rfb1 h6 15.h3 (15.cd5 ed5 16.Qc3 Bd6=) 15...Bd6 16.Ra2 Rb7 17.Bc3 Rab8 18.Rab2 Qc6 (18...Ra8 19.cd5 Nd5 20.Ne4=) 19.Ra1 (19.Qc2 Ra7=) 19...e5 20.cd5 Qd5 21.Nc4 Bc4 22.dc4 Qc6 (22...Qe6 23.Nd2=) 23.Nd2 (better is 23.Qb5 Qc7 24.Rd1+=) 23...Ne4?? (better is 23...Ra7=) 24.Ne4+– Qe4 25.Bf3 Qd3?? (25...Qh4 26.Bb7 Rb7+–) 26.Rd1 (26...Qg6 27.Bb7 Rb7 28.Rbd2+–; 26.Bb7 Rb7 27.Rd2 Qg6+–) 1–0. Fredek (2090) – Guest1052932, Freundschaftspartie, 5m + 0s, 2005.

7.Qc2 Ne4 8.d3 (8.Bd3 f5 (8...Nf6 9.0–0 a6 10.Na3 ab5 11.Nb5 Nc6 12.a3 dc4 13.Bc4 Nd5 14.d4 cd4 15.Nfd4 Nd4+=) 9.0–0 a6 10.a4 b6 11.Be2 dc4 12.Bc4 Nd6 13.d3 Nc4 14.Qc4 Bf6 15.Bf6 Qf6=) 8...Nf6 (8...Qa5 9.Nbd2 Nd2 10.Qd2 Qd2 11.Nd2 Bd6 12.Be2 Nd7 13.d4 b6 14.cd5 ed5 15.Bf3 Bb7+=) 9.Be2 Nbd7 (9...a6 10.ba6 (10.Qa4 b6 11.0–0 Bb7 12.Nbd2 Bd6 13.Rfb1 Nbd7 14.ba6 Ra6 15.Qc2 Qa8=) 10...Na6 11.0–0= Nb4 12.Qb3 Nc6 13.Ne5 Ne5 14.Be5 Bd6 15.d4 cd4=) 10.0–0 b6 (10...Bd6 11.Nbd2 a6 12.ba6 Ra6 13.d4 Rc6 14.cd5 Nd5 15.Nc4 cd4+=) 11.Nbd2 (11.d4 a6 12.cd5 ed5 13.dc5 Nc5 14.Rc1 Nfe4 15.Nc3 Bf6=) 11...Qc7 (11...a6 12.ba6 Ba6 13.Rfb1 Bd6 14.a4 Bb7 15.Bc3 Bc6=) 12.d4 (12.Rfb1 a6 13.ba6 Ra6 14.d4 cd4 15.Nd4 Ra8=) 12...h6 (12...cd4 13.Nd4 a6 (13...Bd6 14.cd5 Bh2 15.Kh1 Qc2+=) 14.Rfc1= (14.Nc6 Bd6 15.Nf3 Bb7=) 14...Nc5 15.cd5 Nd5+=) 13.cd5 (13.dc5 Bc5 (13...bc5 14.Rfd1 Bd6 15.cd5 ed5+=) 14.cd5 Nd5+= 15.Rac1 a6+=) 13...Nd5 (13...ed5 14.dc5 bc5 15.Rfd1 Re8+=) 14.a3 (14.Rac1 a6+= 15.Qa4 Qa7=; 14.Rfc1 a6 15.Qa4 Qa7+=) 14...cd4 (14...a6 15.Rfc1 Bb7=) 15.Qc7 Nc7 16.Nd4 Bf6 (16...a6 17.Bf3 Nd5 18.Nc6+=) 17.Bf3 Rb8 18.Rab1 Bb7 19.Nc6 Bc6 20.bc6 Bb2 21.Rb2 Nc5 22.Rd1 Rfd8 23.Rbb1 Rbc8 24.Nc4 Nd5 25.Bd5 (25.Rd4!?+=) 25...ed5=+ 26.Ne5 f6 27.Ng6 Kf7 28.Nf4 Rc6 29.Rd5 Rd5 30.Nd5 Rd6 (30...Ne4!?=+) 31.Rd1= f5 32.Kf1 (32.h3 Ne4=) 32...Rd7 (32...g5 33.f3=) 33.f3 (33.h3 g5=) 33...Ke6 34.Nf4 Ke7 35.Ke2 Rd1 36.Kd1 Kd6 37.Kc2 b5 38.Ne2 Kd5 (38...a6!?=) 39.Nd4+= f4 40.Nb5 fe3 41.Nc3 (better 41.Na7 Kc4 42.Nc6+=) 41...Kc4–/+ 42.Ne2 Nd3 (42...Ne6 43.Kd1–/+) 43.Kd1 Kb3 (43...g6 44.h4–/+) 44.Nd4=+ Kc3 (better 44...Ka3 45.Nf5 a5=+) 45.Nb5+= Kc4 46.Na7 Nf4 47.g3 Nd5 48.Ke2 Kb3 (48...Kc5 49.a4+–) 49.Nb5 Ka4 (49...g6 50.Kd3+–) 50.Nd4 (50.Nd6 g6+–) 50...Ka3 (better 50...g6!?+–) 51.Nf5+– g6 52.Nh6 Kb4 53.Ng4 Kc5 (53...Kc3 54.Ne3 Nb4 55.f4+–) 54.Ne3 Ne7 55.Kd3 Kd6 56.Ke4 Ke6 57.Kf4 (57.Ng2 g5+–) 57...Kf6 (57...Nc6 58.h4+–) 58.Ng4 Kg7 59.Kg5 Nc6 60.f4 Kf7 (60...Nd4 61.Ne5 Ne6 62.Kg4 Nd4+–) 61.Ne5 Ne5 62.fe5 1–0. Murrell,Mal – Losh,Gary, Mingara, 2000.

7.Qc2 h6 8.a4 b6 9.Ra3 (9.Be2 Bb7=) 9...Bb7 10.Ra1 Nbd7 11.Na3 Qc7 12.Rd1 Rac8 13.Be2 Rfd8 14.d3 Bd6 15.h3 e5 (15...d4 16.0–0=) 16.cd5 Bd5 17.e4 Be6 18.Nd2 Nf8 19.Ndc4 Bc4 20.Nc4 Ne6 21.Nd6 (21.0–0 Nd4 22.Bd4 cd4=) 21...Qd6=+ 22.0–0 Nd4 23.Qd2 (better 23.Bd4 cd4 24.Qd2=+) 23...Ne4?? (23...Ra8 24.Qe3–/+) 24.Qe3?? (better 24.de4 Nf3 25.Bf3 Qd2 26.Rd2 Rd2 27.Be5+–) 24...Nf6–/+ (24...Ne2?! 25.Qe2 Ng5 26.Be5=) 25.Bf3 Nd5 26.Bd5 Qd5 27.f4 (27.Rde1 Qb3 28.Bd4 ed4–+ (worse 28...cd4 29.Qg3–/+)) 27...ef4 (27...Qb3 28.Bd4 ed4 29.Qe4–+) 28.Rf4 Re8 Black intends c4 (28...Qb3 29.Rd2 Re8 30.Qg3 Qa4 31.Rg4–/+) 29.Re4 Re4 30.de4 Qb3 (30...Qc4!? 31.Bd4 Rd8 32.Qg3 cd4 33.Qd3 Qa4 34.Rc1–+) 31.Qb3–/+ Nb3 32.Rd7 (32.Bc3 f6–/+) 32...c4–+ 33.Bc3 Nc5 (33...Nc1 34.Bb2 Na2 35.Bd4–+) 34.Ra7–/+ Ne4 35.Bd4 Nc5 (better 35...c3!? 36.Bb6 Nc5–+) 36.Kf1 (36.a5 c3 37.Bc3 ba5 38.Be5+= (worse 38.Ba5 Rb8=+)) 36...Kf8 (better 36...Nb3!? 37.Bb6 c3=+) 37.a5+– Rb8? (better 37...c3 38.Bc3 ba5 39.Ra5 Nb3 40.Bb4 Ke8+–) 38.Bc5+– bc5 39.b6 c3 40.Ke2 Rd8 (40...g5+–) 41.Rc7 1–0. Smet,Lievin – Segers,Vic, Antwerp league championship, A–series, 1987.

7.Nc3 d4 8.ed4 cd4 9.Na4 e5 10.Ne5 Re8 11.Nd3 (11.f4 Ng4 12.Be2 Ne5 13.fe5 Bf6=+) 11...Bf5 (better 11...Bg4 12.f3 Be6=) 12.Qf3?? (better 12.Be2=) 12...Be4 (12...Bg4 13.Qe2 Be2 14.Be2–+) 13.Qh3 Qa5 14.Nac5 (better 14.Bd4 Qa4 15.Ne5–+) 14...Bc5 15.Nc5 (15.Be2 Bb6 16.Nf4–+) 15…Bf5 (15...Bf5 16.Kd1 Bh3–+) 0–1. GuestHMKK – hfdjjjjvxf, freechess.org, 2019.

7.Nc3 Ne4 8.Qc2 Bf6 (8...Nc3 9.Bc3 Nd7 10.Be2+=) 9.Bd3 Nc3 10.Bc3 (10.Bh7?! Kh8 11.dc3 g6 12.Bg6 fg6 13.Qg6 Qe8 14.Qh6 Kg8+=) 10...h6 11.0–0 dc4 (11...Nd7 12.Rfd1+=) 12.Bc4 (12.Bh7 Kh8 13.Bf6 Qf6+/–) 12...Nd7+= (cont. unknown, 58 moves). Szeligowski – Wilkinson, Colorado, 1979.

7.Bd3 b6 8.0–0= Bb7 9.Nc3 (9.Ne5 a6=+) 9...dc4 (9...a6 10.cd5 ab5 11.Bb5 Nd5 12.a4=) 10.Bc4 Nbd7 (10...a6 11.d4=) 11.Ne2 (11.d4 a6=) 11...Bf3=+ 12.gf3 Qc7 (12...Ne8 13.Qc2=+) 13.f4= Rad8 14.Qb3 Ne4 15.Rad1 (15.Rfd1 Bh4 16.Ng3 Nd6=) 15...Bf6 (15...Nd6 16.Rc1=+) 16.d4= Nd6 (16...cd4 17.Nd4 Rc8 18.Be2=) 17.Bd3 c4 (17...Rc8 18.Qc2=) 18.Qc2 Qb7? (better 18...Rc8!? 19.Bh7 Kh8=) 19.Bh7+– Kh8 20.Ba3 Be7 (20...Nb5 21.Bf8 Nf8 22.Be4+– (22.Qc4 Nd6 23.Qd3 Nh7–/+)) 21.Bd6+– Bd6 22.Be4 Qb8 (22...Qc7 23.Bc6+–) 23.Qc4 Rc8 24.Bc6 White plans d5 24...Nf6 25.Nc3 White prepares the advance d5 (25.Qa4 Rc7+–) 25...g6 (25...a6 26.d5 (26.ba6?! Qc7+–) 26...ab5 27.Qb5+–) 26.d5 e5 (26...ed5 27.Qd4 Be7 28.Nd5+–) 27.fe5 Be5 28.f4 Bd6 (28...Bc3 29.Qc3 Kg7 30.e4+–) 29.Qd4 Kg7 30.Ne4 Be7 31.d6 (31.d6 Bd8 32.Qe5+–) 1–0. DEFFM – GuestZHZS, freechess.org, 2018.

7.Bd3 dc4 8.Bc4 Ne4 (8...a6 9.Na3=) 9.Nc3 (9.Qc2 Nd6 10.Bd3 f5+=) 9...Nd6 10.Bd3 (10.Be2 Nd7=) 10...Bf6 (10...c4 11.Be2=) 11.Qb1 (11.Qc2+=) 11...Re8 (11...a6!?+=) 12.Bh7+/– Kh8 13.Bd3 Nd7 (13...c4 14.Be2 a6 15.a4+/–) 14.a4 (14.h4 Nb6 15.Ne4 Ne4 16.Be4 Bb2 17.Qb2 f5+/–) 14...Nb6 (14...c4 15.Ne4 Ne4 (15...cd3? 16.Nd6 Rf8 17.Bf6 Qf6 18.0–0+–) 16.Be4 Nc5 17.Bf6 Qf6+/–) 15.Ne4+– Bb2 (15...e5 16.h4 (16.Nc5 e4–/+) 16...Kg8 17.h5+– (17.Nc5 e4–/+)) 16.Qb2 Ne4 17.Be4 Nc4 18.Qc3 (18.Qc2 Nd6 19.Ne5 f6 20.Ng6 Kg8+/–) 18...Nd6 19.Qe5 (19.Bc2 Qf6+/–) 19...Ne4 (19...Kg8 20.Bc2+/–) 20.Qe4 Qf6 (20...e5!?+/–) 21.Rc1+– Rb8? (better is 21...Kg8+–) 22.Rc5 b6 (22...Kg8 23.Ng5 Qg6 24.Qg6 fg6 25.Ke2+–) 23.Ng5 (better is 23.Rh5 Kg8 24.Qh7 Kf8 25.Ne5+–) 23...Kg8 (23...Qg6 24.Qg6 fg6+–) 24.Qh7 Kf8 25.Qh5 (25.Rc7 Bd7 26.Rd7 Qa1 27.Ke2 Qf1 28.Rf1 Rbc8 29.Rf7) 25...Ke7 (25...Qg6 26.Qg6 fg6 27.Rc4+–) 26.Rc7 Kd8 27.Ra7 Bb7 28.Nf7 (28.Nf7 Kd7 29.Ne5 Kc7 30.0–0+–) 1–0. Stobbe,Klaus – Wuerfel,Horst, Bayern–ch, 2004.

7.d4 a5 8.Nbd2 b6 9.Be2 Bb7 10.0–0 Nbd7 11.Ne5 Ne5 12.de5 Nd7 13.f4 Qc7 14.Qc2 Rfd8 15.cd5 ed5 16.Rf3 (16.e4 Nf8=) 16...f6 (16...Nf8 17.Rc1=) 17.Rh3 h6 (17...g6 18.Bd3 f5 19.Rc1+=) 18.Rh6 (18.Bg4 Nf8 19.ef6 Bf6 20.Bf6 gf6 21.Rh6 d4+–) 18...Nf8 (18...gh6 19.Qg6 Kh8 20.ef6 Nf6+–) 19.Rh3 fe5 20.Be5 Bd6 21.Nf3 Be5 22.Ne5 Rd6 23.Bd3 Rh6 24.Rh6 gh6 25.Qe2 Re8 Black intends c4 (better 25...Qg7!?+–) 26.Qh5 Re7 27.Qh6 (27.Ng4 c4 28.Nh6 Kh8 29.Ng4 Nh7 30.Bh7 Rh7 31.Qe8 Kg7+–) 27...c4 28.Be2 (28.Bf5 Qc5 29.Ng4 Kf7+–) 28...Qc5 29.Ng4 Nh7 30.Qg6 (30.f5 Kh8+–) 30...Kf8 31.Qf5 Ke8 32.a4 Bc8 33.Qg6 Kf8 (better 33...Kd8 34.f5 c3+–) 34.Re1?? (better 34.f5+–) 34...Bg4+– 35.Bg4 Re3 36.Re3 (better 36.Qh6 Kg8 37.Re3 Qe3 38.Kf1 Qd3 39.Be2+–) 36...Qe3=+ 37.Kf1 Qf4 38.Bf3 Ng5 (38...Nf6!?–/+) 39.Qb6= Nf3 40.gf3 Qf3?? (better 40...Qc1 41.Kg2 Qg5 42.Kh1 Qc1 43.Kg2 Qg5 44.Kf2 Qd2 45.Kg3 Qg5 46.Kh3 Qh5 47.Kg3 Qg5 48.Kf2 Qd2 49.Kg3 Qg5=) 41.Qf2+– Qf2 42.Kf2 Ke7 43.Ke3 c3 44.h4 Kd6 45.Kd3 d4 46.h5 1–0. Lunin,Mikhail (2230) – Poplevin,Alexander (2135), Tournament (Elo) (a), 2008.

7.d4 dc4 8.Bc4 cd4 9.Qd4 Qd4 10.Bd4 Bd7 11.0–0 a6 12.a4 ab5 13.ab5 Ra1 14.Ba1 Ne4 (14...Rc8 15.Be2=) 15.Nbd2 (15.Bd3 Nc5 16.Be2 Rc8=) 15...Nd2 (15...Nd6 16.Rb1=) 16.Nd2+= Bb4 17.Nb3 Rc8 18.Be2 (18.Bd3 f6+=) 18...Be8 19.Rc1 Rc1 20.Nc1 Nd7 21.Nd3 Ba3 22.Bd4 b6 23.Bf3 (23.Ne5 Ne5 24.Be5 Bc5+=) 23...Nc5 (23...Nb8 24.Bb6 Bb5 25.Bc5=) 24.Bc5+= bc5 25.Bc6 c4 (25...Kf8 26.Ne5+–) 26.Be8 (better 26.Ne5 Kf8 27.Nc4+–) 26...cd3+= 27.Kf1 Kf8 28.Bc6 Ke7 29.Ke1 Bb4 30.Kd1 Kd6 31.Be4 d2 32.b6 (32.Bh7 Kc5+=) 32...f5= 33.Bf3 e5 34.g4 (better 34.b7!? Kc7 35.Bc6=) 34...fg4–/+ 35.Bg4 Kc6 36.Bf5 (36.h4 Kb6 37.Be6 Kc5–/+) 36...g6 37.Be6 Kb6 0–1. Jostov,Keylah – Motz,Markus, ZI–2009–0–00352, 2009.

7.Be2 Qc7 8.0–0 b6 9.Qb3 Bb7 10.d3 (10.cd5 Bd5 11.Qc2 Rd8=) 10...Nbd7 (10...Ng4 11.Nbd2=) 11.Nbd2 (11.cd5 Nd5 12.Nbd2 Bf6=) 11...Rae8 (11...a6 12.ba6 Ra6 13.cd5 Bd5 14.Nc4=) 12.Rfc1 (12.cd5 Bd5 13.Qc2 Ng4+=) 12...Bd6 (12...d4 13.ed4 cd4 14.Bd4=) 13.h3 (13.cd5 Bd5 14.Qc3 Rc8+=) 13...dc4 (13...d4 14.ed4 cd4 15.Nd4 Bh2 16.Kh1=) 14.Nc4 e5 (14...Rd8 15.Qa3+=) 15.e4 (15.Nh4 e4+=) 15...Bc8 (15...a6 16.a4+=) 16.a4 h6 (16...Nh5 17.g3+=) 17.a5 (17.Nh4 Be7+/–) 17...Kh8 (17...Nh5 18.g3 Rd8 19.Nh4+/–) 18.ab6 (18.Qc2 Nh5+/–) 18...Nb6 (better is 18...ab6!? 19.Qc3 Re6+/–) 19.Nd6+– (19...Qd6 20.Qc2+–) 1–0. Zoidberg – Lanzelot, mySchach.de, 2004.

7.Be2 d4 8.ed4 cd4 9.Bd4 Nbd7 10.0–0 Qc7 11.Nc3 e5 (11...Rd8 12.Be3+–) 12.Be3 1–0. DEFFM – Irakli, freechess.org, 2018.

7.Be2 Nfd7 8.0–0 Nb6 (8...dc4 9.Bc4 Nb6 10.Be2=) 9.d3 dc4 (9...a6 10.a4=) 10.Qc2 (10.dc4 Qd1 11.Rd1 Na4+=) 10...Bf6 (10...cd3 11.Bd3 f5 12.Rd1=) 11.Bf6 (11.dc4 Bb2 12.Qb2 Na4+/–) 11...Qf6= 12.dc4 a6 (12...Qa1 13.Nc3 Qf1 14.Bf1=) 13.Nc3 ab5 (13...Rd8 14.Bd3 Qh6 15.a4+=) 14.cb5 N8d7 15.a4 (15.Rfc1 Qh6+=) 15...Nd5 16.Nd5 (16.Ne4 Qe7+=) 16...ed5 17.a5 c4 18.e4 (18.Qd2!? Qf5 19.Nd4+=) 18...Qg6= 19.Rfc1 de4 (< 19...Qe4 20.Qe4 de4 21.Nd2+=) 20.Nd2 Nf6 21.Bc4 (21.Nc4 Bh3 22.Bf1 Rfc8=) 21...Bh3 22.Bf1 Rfc8 23.Nc4 (23.Qb3 Rc1 24.Rc1 Be6=) 23...Nd5 24.Qb3 (24.Qd2 Rd8 25.a6+=) 24...Nf4?? (better is 24...Bg2 25.Qg3 Bf1 26.Qg6 hg6 27.Kf1 Rc7–/+) 25.Qg3+– (25…Bg2 26.Qf4 Bf3 27.Qg3+–) 1–0. Franke,Roland – Schueppen,Heinrich, Bahn–ch Pocking, 1996.

7.e4? Nbd7 8.Ke2 b6 9.a4? a5 (9...de4!? 10.Ne5–+) 10.d3 (10.e5 Ne4–/+) 10...Bb7 (10...de4 11.de4 Ne4 12.Nc3 Nc3 13.Bc3–+) 11.Nbd2 (better 11.e5 Ne8 12.Ke1–/+) 11...Ne5?? (11...de4 12.de4 Be4 13.Ne4 Ne4 14.Ne5 Ne5 15.Qd8 Rad8 16.Be5 Rd2 17.Ke3 Nf2 18.Kd2 Nh1 19.Ke3+–) 12.Rc1?? (12.Be5 Ng4 13.Bg3 f5+–) 12...Ba6?? (better 12...Nd3!? 13.Kd3 de4 14.Kc2 ef3 15.Nf3 Qc7–+) 13.Qc2?? (better 13.Ne5 Bb7 14.cd5 ed5 15.Kf3+–) 13...Qc7?? (better 13...Nf3 14.Kf3 Bb7 15.cd5 ed5–/+) 14.Nd4 (better 14.Be5 Qd8 15.ba6+–) 14...Nc4?? (14...de4 15.Ne4 Ne4 16.Nf3 Nf3 17.de4 Nd4 18.Bd4 cd4 19.ba6–+) 15.Qc3?? (15.dc4 cd4 16.cd5 Qc2 17.Rc2 Rfc8 18.Rc8 Bc8 19.de6 Be6 20.Bd4 Nd7+–) 15...Qb8?? (15...Nb2 16.Qb2 Bb7 17.Qc2–+) 16.N4b3?? (16.Nc6 Qe8 17.dc4+– (17.ba6?! Qc6 18.dc4 de4+=; 17.Nc4?! dc4 18.Ne7 Qe7 19.ba6 cd3 20.Kf3 Ra6+–; 17.Ne7?! Qe7 18.Nc4 dc4 19.ba6 cd3 20.Qd3 Rfd8+–)) 16...Nd6?? (16...Nb2!? 17.Qb2 Bb7 18.d4–+) 17.Rg1?? (17.ba6 d4 18.Qc2 Nd7+–) 17...Qc7?? (17...Bb5 18.ab5 a4 19.ed5 ed5 20.Qc2–+) 18.Kd1?? (18.ba6 Nde8+–) 18...Qa7?? (better 18...Bb5 19.ab5 a4–/+) 19.Qf6?? (better 19.ba6 d4 20.Qc2+–) 19...e5 (better 19...Bf6 20.Bf6 gf6 21.ba6 Rfd8–+) 20.Na1 (20.Na1 Bf6 21.ba6–+) 1–0. Bulcourf,Carlos (2295) – Maggiolo,Sonia, Florida VALLE, 1993.

7.e4? de4 8.Ne5 –/+.

7.Ne5 Bd6+=.

7.a4 a5

8.ba6 Na6 9.Be2 b6 10.Na3 Bb7 11.0–0 Nb4 12.Qb3 Nd7 13.Nc2 Nc6 14.Bc3 Na5 15.Qb2 Bf6 16.Bf6 Qf6 17.Qf6 Nf6 18.Ne5 (better is 18.Rfb1!?+=) 18...Nb3–/+ 19.Ra3 Nd2 20.Rd1 Nc4 21.Bc4 dc4 22.Nc4 Ra6 23.Rd6 Bd5 24.Nb2 Rfa8 25.Rd3 Kf8 26.Na3 Ke7 27.Nac4 Ra4 28.R3d5 (28.Na4 Ra4 29.Rd1–+) 28...Ra1 (better is 28...Nd5 29.f4 Ra1 30.Kf2 b5–+) 29.Nd1?? (better is 29.Rd1 b5 30.Ne5+=) 29...ed5 30.Nb6 Rb8 (30...Rb8 31.Rd5 Nd5 32.Nd5 Kd7–+; 30...Rd1 mate) 0–1. Savic,Draga (2140) – Nenezic,M (2325), 25th Belgrade Trophy, 2011.

8.Qc2 Nbd7 9.d3 b6 10.Nbd2 Bb7 11.Be2 Rc8 12.0–0 Bd6 13.Rac1 Re8 14.Qb1 d4 15.ed4 cd4 16.Nd4 Nc5 17.Qc2 e5 18.Nf5 Bb8 19.Rfe1 Qd7 20.Ng3 Rcd8 21.Nde4 Nfe4 (21...Nd3? 22.Nf6 gf6 23.Red1+–) 22.Ne4 Nd3 23.Bd3 Qd3 24.Qd3 Rd3 25.f3 f5 26.Nf2 Rb3 27.Bd4 Bc7 28.c5 bc5 29.Bc5 (worse is 29.Rc5 Bd6 30.Rc3 Rb4+=) 29...Kf7 30.Red1 Ke6 31.Bb4 Rc8 32.Bc5 e4 33.fe4 fe4 34.Ng4? (34.Re1 Kf5 35.g4 Kf4 36.Rc4+=) 34...Bf4 Black prepares the advance e3 35.Rc2 Rd3 (35...h5 36.g3 Rd3–+ (36...hg4?! 37.gf4 e3 38.Re1=)) 36.Rf1 Bg5 37.Rf8? (better is 37.Re1+=) 37...Rf8 38.Bf8 e3 39.Kf1 h5 40.Rc5? (40.Rc7 Rd1 (worse is 40...hg4 41.Rb7 Rd1 42.Ke2 Rd2 43.Ke1 Rg2 44.Rb6 Kf5 45.Bd6–+) 41.Ke2 Rd2 42.Ke1 hg4 43.Rb7 Rg2 44.Rb6 Kf5–+) 40...Rd5 (better is 40...Rd1 41.Ke2 Rd2 42.Ke1 hg4–+) 41.h4?? (better is 41.Ne3 Be3 42.Rc7 Rf5 43.Ke2 Rf8 44.Rb7–+) 41...Rc5 (better is 41...Rd1 42.Ke2 Rd2 43.Kf1 Bg2 44.Kg1 Bf4 45.Re5 Be5 46.Ne5 Ke5 47.Be7 Kf4 48.Bg5 Kf3 49.Kh2 Rd1 50.Be3 Rh1) 42.Bc5= hg4 43.hg5 e2 (43...Kd5!? 44.Bb6 Kc4 45.Ba5 Kb3+=) 44.Ke2+/– Bg2 45.Bb6 Bd5 46.Ba5 Bb3 (46...Kd7 47.Bc3 Bb3 48.a5 Bc4 49.Ke3 Bb5 50.Bg7+–) 47.b6 Bd5 48.Bc3 g6 49.Ke3 Kd7 50.Kd4 Kc6? (better is 50...Bb7+–) 51.b7! (51.b7 Kb7 52.Kd5+–) 1–0. Steffens,Olaf (2270) – Kende,Gyorgy Dr (2100), 20th Pannonia–Ramada Kupa, Fide Open, 2015.

8.Be2 b6 9.0–0 Bb7 10.d4 Nbd7 11.Nbd2 Rc8 12.Rc1 Qc7 13.Ne5 Ne5 14.de5 Nd7 (14...Ne4 15.Ne4 de4 16.Qb3=) 15.f4+= f5 (15...d4 16.Nf3+=) 16.Bf3 Rfd8 (16...d4 17.ed4 cd4 18.Bb7 Qb7 19.Nf3=) 17.cd5 Bd5 18.Bd5 ed5 19.g4 fg4 20.Qg4 Nf8?? (better 20...c4 21.Qe6 Kf8 22.Qd5 Nc5+–) 21.f5+– 1–0. GuestYPGY – Guestxxx, freechess.org, 2019.

8.Be2 b6 9.0–0 Bb7 10.Ne5 Nfd7 11.f4 f5 12.g4 (12.Bf3 Ne5 13.Be5 Nd7=) 12...Ne5+= 13.fe5 Bh4 14.cd5 Bd5 (14...ed5 15.Nc3+=) 15.Nc3= Bb7 16.Bf3 (16.Bc4 Bc8+=) 16...Ra7 (16...Bf3 17.Rf3 Qg5–/+ (worse is 17...fg4 18.Rf8 Qf8 19.Qg4+=)) 17.Bb7 Rb7 18.gf5 Qg5 (18...Rbf7 19.f6 gf6 20.Kh1=) 19.Kh1 Rf5 20.Ne4 Rf1 21.Qf1 Qg6 22.Nd6 Rd7 23.Qh3 Qh6 24.Qf3 g5 25.Rf1 Qg7 26.Ne8 g4 27.Qf4 Bg5 28.Qg4 Qg6 29.Nf6 Bf6 30.Qe6 Rf7 (30...Qf7 31.Qg4 Qg6 32.Qc4 Rf7+–) 31.ef6 Kh8 (31...Nd7 32.Rg1 Kf8+–) 32.Rg1 (32.Rg1 Nc6 33.Qe8 Rf8 34.Qf8 Qg8 35.Rg8 mate) 1–0. Taus,M (2125) – Kocur,Gustav (1795), Orlova Open Orlova CZE, 2011.

8.Be2 Nbd7 9.0–0 Qc7 10.Na3 (10.d4 dc4 11.Bc4 cd4 12.Qd4 Rd8=) 10...b6 (10...e5 11.d4 cd4 12.ed4=) 11.d3 Bb7 12.Rc1 Rad8 13.h3 (13.cd5 Nd5 14.Nc4 Bf6=) 13...e5 14.cd5 Nd5 15.Qb3 (15.Nc4 Bf6=) 15...Kh8 (15...Nb4 16.Nc4 Bd5 17.Qa3=) 16.Nc4 f6 (16...Bf6 17.Nfd2=) 17.g3 (17.Ne1 Nb4=) 17...Qb8 (17...Nb4 18.Nfd2=) 18.Rfd1 Qa8 (18...Nb4 19.Ne1=) 19.e4 Nc7 (19...Nb4 20.Nh4+=) 20.Ne3 Rfe8 21.Nh4 Bf8 22.Bg4 g6+= 23.Qf7 Re7= 24.Ng6 hg6=+ 25.Qg6 Rg7 26.Qh5 Rh7 27.Qg6 Be7 28.Bf5 Nf8 29.Qg4 Bc8 30.Nc4 Bf5 31.Qf5 Nd7 32.f4 ef4 33.gf4 Rg8 34.Kh2= Qe8 35.Rg1 Rgg7 36.Rg7 Rg7 37.Rg1 Rg1 38.Kg1 Qg8 39.Kf2 Ne6? 40.h4 Bd8= 41.e5 fe5 42.Ne5 Nf6? 43.Ng6?? Kg7=+ 44.h5 Nd4 45.Bd4 Qa2 46.Bb2?? Qb2–+ 47.Kf3 Qh2 48.Ne5 Qh5 49.Qh5 Nh5 50.Ke4 Bc7 51.d4 Nf4! 52.dc5 Be5 53.cb6 Kf6 54.b7 Ke6 55.b8Q Bb8 56.Kd4 Ba7 57.Kc4 Kd6 58.b6 Bb6 59.Kb5 Bc7 60.Kc4 Ne6 61.Kb3 Nc5 (62.Ka3 Ke6–+) 0–1. Frosinos,Ioannis – Tegelidis,Petros (2115), Chania op 8th, 1998.

8.Be2 Nbd7 9.d3 Qc7 10.Nbd2 b6 11.Qc2 Bb7 12.h3 e5 13.cd5 (13.0–0 Rad8=) 13...Nd5 14.Nc4 (14.0–0 Rad8=) 14...Bf6 15.0–0 Rfe8 16.Rac1 Rad8 17.Rfd1 g6 (17...Kh8 18.e4 Nf4 19.Rd2=) 18.Qb3 Qb8 (18...Bg7 19.Ng5=) 19.Nfd2 Bg7 20.Ne4 Nf8 21.Bf3 Ne6 22.Rd2 h6 (22...Qc7 23.Nc3 Nb4 24.Bb7 Qb7 25.Ne2=) 23.Nc3 Nc3 (23...Nb4 24.Bb7 Qb7 25.Ne2=) 24.Bb7+= (< 24.Rc3 Bf3 25.gf3 Ng5–+; 24.Qc3? e4 25.Qb3 Bb2 26.Qb2 ef3–+; 24.Bc3 Bf3 25.gf3 Ng5–/+) 24...Qb7 25.Bc3 f6 26.Ba5 (26.Qd1 Kh7+=) 26...ba5= 27.Na5 Qf7 28.Nc4 (28.Nc6 Rd6=) 28...f5=+ 29.b6 f4 30.Qd1 Rf8 31.a5= Qb7 32.Ra2 f3 33.a6 Qc6 34.Qb3+/– fg2 35.Na5 Qd7 36.Kg2 Kh7= 37.h4 c4 38.Rc4= Qd5 39.Re4 Qd7 40.Rc2 Qf7 41.Kg1?? Qf3–+ 42.Rec4 e4! 43.d4 Qg4 44.Kf1 Qh3 45.Ke1 Qh1 46.Kd2 Qa1 47.Ke2 Qa5 48.a7 Qh5 49.Ke1 Qh4 50.Re2 Qg5 51.Qa3 Nd4! 52.ed4 Qg1 53.Kd2 Bd4 54.Qf8 Rf8 55.Rd4 Qg5 56.Kd1 Qb5 57.Ree4 Qb1 58.Ke2 Qb6 59.Rd7 Kg8 60.Red4 h5 61.f4 h4 62.R4d6 Qb5 63.Ke3 Qf5 64.Rd4 ½–½. Schulze,Harald (2115) – Mueller,Marcus (2085), Bayern Landesliga Nord, 1998.

7.a4 a6

8.Na3 ab5 9.cb5 (9.ab5!? Bd6 10.Be2=) 9...Nbd7 10.Bd3 (10.Be2 Bd6=+) 10...c4 11.Bc2 Nc5 (11...Bd6 12.0–0–/+) 12.0–0 Nfe4 13.Nb1 f6 14.d4 (14.Ne1 f5=+) 14...cd3 15.Bd3 Nd3 16.Qd3 Nc5 17.Qc2 b6 (17...Bd7 18.Rc1=+) 18.Rd1 Bb7 19.Nc3 Rc8 (19...Qc7 20.Rac1=+) 20.Qb1 (20.Rac1 Qe8=) 20...Qc7 (20...Bd6 21.Ba3=+) 21.Qa2 Bd6 22.Rac1 Rfd8 23.Ba3 Qe7 (23...Qf7 24.Nd4=+) 24.Rc2 (24.Qe2 Qe8 25.Nd4 Qg6 26.Bc5 bc5=+) 24...Ne4 25.Bd6= Nd6 26.Nd2 Nc4 27.Ne2 Na5 28.Rdc1 Kf7 29.Nd4 Qd7 30.Rc8 Rc8 31.Qb1 Rc1 32.Qc1 Qc8 33.Qc8 Bc8=+ 34.Kf1 Ke7 35.Nc2 Kd6 36.e4 Bb7–/+ 37.Ke2 de4 38.Ke3 f5 39.Kd4 e5 40.Kc3 Bd5 41.Nb4 f4 42.g3 g5 43.Nb1 Bb3 44.Na3? h5 45.Nac2? Bd5 (46.Nd5 Kd5 47.Nb4 Ke6 48.gf4 gf4–+; better is 45...Ba4 46.gf4 ef4–+) 0–1. Lane,Lisa – Keller Hermann,Edith, Damen Olympiade, 1966.

8.Qb3 Nbd7 9.Be2 b6 10.Na3 a5 11.g4 (11.0–0 Bd6=) 11...Bb7 12.Rg1 Qc7 13.h4 (13.g5 Ne4=) 13...Rad8 14.g5 Ne8 15.h5 (15.cd5 ed5 16.Nc2 c4+=) 15...d4+= 16.h6 e5 17.hg7 (17.ed4? fails to 17...cd4 18.hg7 Ng7–+) 17...Ng7 18.Qc2? (better is 18.Nh4!?+= is worth looking at) 18...e4–/+ 19.ed4?? (19.Rh1 f5 20.Ng1–+) 19...ef3–+ 20.Bd3 (20.Rh1 f5 21.gf6 Bf6 22.Qh7 Kf7 23.Bd3 Rfe8 24.Kd1–+) 20...f5 21.gf6+= Nf6 22.d5 Rf7 23.0–0–0 Bc8 24.Rde1 Bd6 25.Qc3? Rdf8 26.Qc2 Bh3 27.Rh1 Qd7 28.Reg1 Rc8 29.Nb1 Be5?? 30.Nc3 Re7 31.Kb1 Kh8 32.Re1? Bd4?? 33.Ne4?? Ne4 34.Be4? Bf5?? 35.d3 Be4 36.de4+= Qd6?? 37.e5+– h5 38.ed6 Re1 39.Re1 Bf2 40.Ka2! Rc7 41.Qc1 (41.Qc1 Be3 42.Qe3 f2 43.dc7 Kh7 44.Qe4 Kg8 45.Qg6 fe1Q 46.Qg7; 41.Re8) 1–0. Ferreiro Montoya,JI (2225) – Ruiz Gomez,A (2365), Euskadi–chTA, 2001.

8.Qc2 h6 9.Be2= Bd7 (9...b6 10.0–0=) 10.Ne5 dc4 11.Bc4 ab5 12.ab5 Ra1 13.Ba1 Be8 (13...Ne8 14.0–0=) 14.0–0+= Nd5 15.Qd1 (15.d4 Qa5 16.Qb2 cd4 17.Qd4 Bf6+= (17...Bb5? 18.Nc6 Qa1 19.Ne7 Ne7 20.Qa1 Bc4 21.Rd1+–)) 15...Nd7 16.Ng4 (16.Qg4 Bf6 17.d4 cd4 18.ed4 N7b6=) 16...N5b6 (16...Qa5 17.Qb3=+) 17.d3= Nd5 (17...Nc4 18.dc4 Qc7 19.f4=) 18.e4 Nc7 19.Nh6 gh6 20.Qg4 Bg5 21.f4 1–0. Ovcharenko,Leonid – Tarasov,Valentin, 2008.

8.Nc3 ab5 9.ab5 Ra1 10.Qa1 Nbd7 11.cd5 ed5 12.Ne2 (12.Be2 Nb6=) 12...Qb6 (12...Re8 13.Ng3+=) 13.Ng3 Re8 14.Nf5 Bf8 15.g4 (15.Be2 Qe6 16.Ng3 Ne4+=) 15...d4 16.g5 Ne4 17.Be2 (17.Bd3 Ne5 18.Ne5 Bf5 19.ed4 c4 20.Bc4 Re5–+) 17...Ne5 (17...Qg6 18.N5h4 Qe6 19.Qc1–/+) 18.Ne5 Bf5 19.Nc4 (19.ed4 Ng5 20.f4 Ne6 21.dc5 Bc5–+) 19...Qd8 (19...Qb5!? 20.Rg1 Qc6 21.ed4 Ng5 22.Ne3 cd4 23.Bd4–+ (23.Rg5 Qh1 24.Nf1 Re2 25.Ke2 d3 26.Ke1 Bh3 27.Rg1 Qg1 28.Bg7 Qf1)) 20.h4 (20.f4 Qd5 21.Nb6 Qe6–+) 20...Qd5 21.Nb6 Qe6 22.Nc4 d3! 23.Bd3 Nf2! 24.Bf5 (24.Kf2 Bd3 Discovered attack) 24...Qf5 25.Rf1? (better is 25.0–0 Qg4 26.Kf2 Qh4 27.Kg1 Qg5 28.Kf2 Qh4 29.Kf3 Qe4 30.Kf2 Qc4 31.Rg1–+) 25...Nd3 26.Ke2 Qe4 27.Nb6 c4 28.Rg1 Qh4 29.Rg2 (29.Qf1 Nb2 30.Qf3 Qh2 31.Qg2 Qh5 32.Qf3 Qg6 33.Qb7 Qd3 34.Kf3 Qd2–+) 29...Nf4 (29...Qh5 30.Kf1 Qh1 31.Ke2 Qg2 32.Kd1 Qf1 33.Kc2 Nb4 34.Kc3 Qd3) 30.Kf3–+ Ng2 31.Nd7 (31.Kg2 Qg5 32.Kf2 Qf5 33.Ke2–+) 31...Qh3 32.Kf2 Qd7 33.Kg2 Qd2 34.Kg3 (34.Kf1 Re3 35.Be5 Rf3 36.Kg1 Qf2 37.Kh1 Rh3 38.Bh2 Rh2) 34...Re3 35.Kh4 Qf2 36.Kh5 (36.Kg4 Qg2 37.Kh4 Qh3#) 36...Rh3 37.Kg4 Qf3 0–1. Salazar Gould,Melanie (1670) – Rodriguez Arrieta,M E (1880), Final Championship Nacional Femenino, 2016.

7.a4 b6

8.Qc2 Bb7 9.d3 Nbd7 10.Nbd2 Qc7 11.Bc3 (11.Be2 a6=) 11...e5 12.e4 (12.cd5 Nd5 13.a5 Nc3 14.Qc3 ba5 15.Qa5 Qa5 16.Ra5 a6 17.ba6 Ba6=+) 12...d4 13.Bb2 Ne8 14.g4 Nd6 15.Bg2 g6 (15...a6 16.0–0–/+) 16.Rg1 Kh8 17.0–0–0 (17.g5 a6=+) 17...f5 (17...a6 18.Rde1–/+) 18.gf5=+ gf5 19.Ne1 (19.Rde1 a6=+) 19...Rg8 (19...a6 20.ef5 Rf5 21.Ne4–/+) 20.ef5=+ Raf8 21.Ne4 Rf5 22.Ng3 Rf4 23.Bb7 Qb7 24.Ng2 Rf7 25.Kb1 Qf3 (25...a6 26.Rde1=+) 26.Rd2 Qg4 27.Qd1 (27.Re2 a6=+) 27...e4 (27...Qd1 28.Rgd1 (28.Rdd1? Rf2 29.Bc1 h5–+) 28...h5 29.Ne1–/+) 28.Qg4=+ Rg4 29.h3 (29.de4 Ne5 30.Rc2 Ndc4–/+) 29...Rg8 30.de4 Ne5 31.Ne1? (31.Re2!?–/+) 31...Ndc4 (31...Ne4!? 32.Re2 Nc4 33.Nd3–+) 32.Rc2 Nb2 33.Rb2 c4 Black prepares the advance d3 34.Rg2 (34.Rd2 d3 35.Rg2 Nf3 36.Nf3 Rf3–+) 34...Bc5 (better 34...c3!? 35.Rb3 d3 36.Nd3 Nd3 37.Rc3 Nf2 38.e5–+) 35.Nf5 Rg2 36.Ng2 Nf3 37.Rc2? (better 37.Nf4–+) 37...d3 38.Ra2 Nd4 (better 38...c3 39.Kc1 Ng5 40.f3–+) 39.Nfe3? (39.Rd2 Nf5 40.ef5 Rf5 41.f4–+) 39...c3 40.f4 (40.Ne1 d2 41.N1c2 Nc2 42.Kc2 Be3–+) 40...c2 (better 40...Rg7!? 41.f5–+) 41.Rc2 (41.Nc2 Nc2 42.Rc2 dc2 43.Kc2–+) 41...dc2 (worse 41...Nc2 42.Nc2 Rg7 43.Nce1–+) 42.Nc2 Nc2 (better 42...Ne2!? 43.f5–+) 43.Kc2 Rg7 (43...Rg7 44.Ne1 Rg3–+) 0–1. Jacobs,Jean – Mauquoy,Paul, Belgian championship, 1970.

8.Be2 a5 9.0–0 Bb7 10.d3 dc4 11.dc4 Nbd7 12.Nc3 Qc7 13.Qc2 Bd6 14.Rad1 Rad8 15.h3 Rfe8 16.Nd2 Ne5 17.f4 Ng6 18.Bf3 Bf3 19.Nf3 Be7 20.Ne2 Rd7 21.Rd7 Nd7 22.Rd1 Bf6 23.Bc3 Rd8 24.g3 Bc3 25.Nc3 Ndf8 26.Rd8 Qd8 27.Kg2 f6 28.e4 Qd7 29.Qe2 Ne7 30.Nd1 Nfg6 31.h4 Nh8 32.Nf2 Nf7 33.e5 f5 34.h5 Kf8 35.Kf1 Ng8 36.Ke1 Ngh6 37.Qd1 Qb7 38.Qd3 Ke8 39.Nd2 g6 40.hg6 hg6 41.Qf3 Qf3 42.Nf3 Kd7 43.Kd2 Ke7 44.Ke3 Kf8 45.Ke2 Kg7 ½–½. Buczinski,Henryk (2195) – Vertongen,Willy (2205), WC–2011–F–00004, 2011.

8.Be2 a6 9.h3 Bb7 10.0–0 Qc7 11.Be5 Qd7 12.Qc2 (12.Nc3 dc4 13.Bc4 ab5 14.Bb5 Nc6=) 12...Rd8 (12...dc4 13.ba6 Na6 14.Qc4+=) 13.d3 g6 (13...dc4!? 14.dc4 Qc8=) 14.Nbd2 dc4 15.Nc4 Bf3? (better is 15...Nd5!?+=) 16.Bf3+– (16.gf3?! Nd5= (16...ab5? 17.Nb6 Qb7 18.Na8+–)) 16...Ra7 (16...Nd5 17.Bd5 Qd5 18.Bc7 Qd3 19.Qd3 Rd3 20.Nb6+– (20.Bb6?! Rc3 21.Rac1 Rb3+=)) 17.Nb6 Qd3?? (17...Qe8+–) 18.Qd3 Rd3 19.Nc8 (better is 19.Bb8 ab5 20.Ba7+–) 19...Rad7 20.Ne7 Re7 21.Bf6 Re8 22.ba6 Na6 23.Bc6 Rb8 24.Bb5 Nb4 25.Bd3 Nd3 26.a5 Ra8 27.Rfd1 c4 28.a6 e5 (28...g5+–) 29.a7 Nb4 30.Rd8 Rd8 31.a8Q (31.a8Q Nc6 32.Qd8 Nd8 33.Ra8 h6 34.Rd8 Kh7 35.Rh8#) 1–0. Woelfelschneider,Peter – Kurz, 2009.

8.Be2 Bb7 9.0–0 a5 10.d4 Nbd7 11.Nc3 Rc8 12.cd5 ed5 13.Qb3 Re8 14.Rad1 c4 15.Qc2 Bd6 16.Rfe1 Qc7 17.Bf1 Ne4 18.g3 Ndf6 19.Bh3 Rcd8 20.Rf1 Bc8 21.Bg2 Bg4 22.Rc1 Qc8 23.Ne4 Ne4 24.Ne5 Bf5 25.Qd1 f6 26.Nc6 Rd7 27.g4 Bg6 28.f3 Ng5 29.h4 Ne6 30.f4 Nc7 31.f5 Bf7 32.Qf3 Na6 33.g5 Nb4 34.Qg4 Re3 35.g6 Be8 36.Rc3 Rc3 37.Bc3 Bf8 38.Qe2 hg6 39.fg6 ½–½. Myers – Riego, Lugano 1968.

8.Be2 Bb7 9.d3 Nbd7 10.Qc2 dc4 11.Qc4 Qc7 12.e4 Ng4 13.h3 Nge5 14.Qc2 Nf3 15.Bf3 Ne5 16.Nd2 Rfd8 Attacks the backward pawn on d3 17.Be5 Qe5 18.0–0 Qd4 19.Be2 Bf6 20.Nf3 Qd6 21.Rad1 e5 22.Nd2 Bc8 23.Nc4 Qe7 24.f4 ef4 25.Rf4 Bd4 26.Kh1 f6 (26...g5 27.Rf3–/+) 27.Rdf1 Kh8 28.Bg4 Re8 29.Bf5 Bf5 30.Rf5 Qc7 31.Rd5 Rad8 32.Rff5 Qg3 33.Qe2 Rd5 34.Rd5 Qc7 (34...Qf4 35.Qd1=) 35.Nd6 Rf8 36.Qa2 1–0. GuestCFBT – GuestCTMV, freechess.org, 2017.

8.Be2 Qc7 9.0–0 (9.Be5 Qd8=) 9...Bb7 (9...Nbd7 10.h3=) 10.d4 (10.Be5!? Qd8 11.cd5 Nd5 12.Nc3=) 10...Nbd7=+ 11.Nbd2 Bd6 (11...cd4 12.Nd4 Rac8 13.Rc1=+) 12.Rc1= Qd8 (12...h6 13.g3=) 13.cd5 Bd5 (13...ed5 14.dc5 Nc5 15.Ne5=) 14.Qc2 Rc8 15.e4 cd4?? (better 15...Bb7 16.Qb1 cd4 17.Bd4 e5 18.Rc8 Qc8=+) 16.Qc8+– Qc8 17.Rc8 Rc8 18.ed5 Rc2 (18...Nd5 19.Bd4 Bb4 20.Ne4+–) 19.Bd4 Nd5 20.Bd3 Rc8 21.Ne4 Bb8 22.Be3 (22.Rd1 h6+–) 22...e5?! (22...Bf4 23.Bf4 Nf4+–) 23.Rc1 Rc1 24.Bc1 f5 (24...N5f6 25.Nf6 Nf6 26.Bb1+–) 25.Bc4 (25.Bc4 fe4 26.Bd5 Kh8 27.Be4+–) 1–0. GuestMFCS – GuestFGNY, freechess.org, 2019.

7.a4 Nbd7

8.Qb3 d4 9.ed4+= cd4 10.Bd4 (10.Nd4 Nc5 11.Qf3=) 10...e5 (better 10...Bd6=) 11.Be5 (better 11.Ne5 Ne5 12.Be5+=) 11...Ne5–/+ 12.Ne5 Qd4 13.Qc3 Bc5 14.Kd1? (better 14.Nf3 Qf2 15.Kd1–+) 14…Ne4–+ (14...Ne4 15.Qd4 Bd4–+; 14...Qf2?! 15.Nd3 Qf5 16.Be2=+) 0–1. jaddwarrior (1700) – Board_Pirate (2700), ChessWorld.net, 2013.

8.Be2 Qc7 9.h3 (9.0–0!?=) 9...e5–/+ 10.cd5 Nd5. GuestQVBQ – GuestTTYW, freechess.org, 2017.

7.Qc2 a6

8.a4 Nbd7 9.Nc3 Nb6 10.cd5 Nbd5 11.Nd5 ed5 12.ba6 ba6=.

8.a4 Nbd7 9.Nc3 dc4 10.Bc4 Nb6 11.Bd3 ab5 12.ab5 Ra1 13.Ba1 c4 14.Be2 Bd7 15.Qb1 Qa8 (15...Nfd5 16.0–0=) 16.0–0 Nbd5 (16...Rc8 17.d3=) 17.Nd4 (better 17.Bc4!? Nb6 18.Be2+–) 17...Nc3 18.Bc3 Rc8 19.Qb2 (19.Qc2 Qb8=) 19...Qa7 (19...e5 20.Nc2 Qa4 21.Be5 Qb5 22.Qb5 Bb5 23.Rb1=) 20.Ra1 Qc5 The isolani on b5 becomes a target 1–0. GuestXYFF – GuestDTTN, freechess.org, 2017.

8.a4 Nbd7 9.Bd3 h6 (9...ab5 10.ab5 Ra1 11.Ba1+=) 10.Nc3 ab5 11.Nb5 (worse is 11.cb5 c4 12.Be2 b6–/+) 11...b6 (11...Nb6 12.Ne5=) 12.Ne5 (12.0–0 Bb7=) 12...Bb7 13.0–0 Ne4 (13...Ne5 14.Be5 dc4 15.Bc4=) 14.Rfd1 (14.cd5 ed5 15.f3 Nef6+=) 14...Ndf6 (14...Ne5 15.Be5 Bf6 16.Bc7=) 15.Be2 (15.cd5 ed5 (15...Qd5? 16.f3 Ng5 17.h4 Nf3 18.gf3+–) 16.f3 Nd6+=) 15...dc4 (better is 15...Nd6!?+=) 16.Nc4 Bc6 17.Ne5 (17.d4 Qb8 18.dc5 Bb5 19.ab5 Ra1 20.Ra1 Nc5+–) 17...Bb7+= 18.Nc4 Bc6 19.d4 Bb5 (19...Qb8 20.f3 Nd6 21.Nbd6 Bd6 22.Nd6 Qd6 23.dc5 Qc5 24.Qc5 bc5 25.a5+/–) 20.ab5 (20.dc5 Qc8 21.ab5 Ra1 22.Ba1 Qc5+–) 20...Ra1 21.Ba1 (21.Ra1 Qc7+/–) 21...Qc7 22.Bd3 (22.dc5 Nc5 23.Be5+/–) 22...Nd6 (22...cd4 23.Bd4 (worse is 23.Be4 Ne4 24.Qe4 Qc4=) 23...Nc5 24.Be5+/–) 23.Ne5 (23.dc5 bc5 24.Be5 Rd8+–) 23...Nd5 (23...c4 24.Nc4 Rc8 25.Rc1+/–) 24.Nc6 (better is 24.dc5 Qc5 25.Nc6+–) 24...Nb4?? (better is 24...c4 25.Bc4 Nc4 26.Qc4 f5+/–) 25.Nb4+– Rc8 (25...c4 26.d5 Nb5 27.Qc4 Qc4 28.Bc4 Bb4 29.Bb5 ed5 30.Bc6+–) 26.Nc6 Bf6 (26...c4 27.Bc4 Nc4 28.Qc4+–) 27.dc5 bc5 28.Bf6 gf6 29.Qc5 1–0. Heindrich,Janos – Szamoskozi,Gabor, ch junior team Spata, 1998.

7.Qc2 b6

8.d3 Bb7 9.Be2 Nbd7 10.Nbd2 Qc7 11.0–0 Rfd8 12.h3 e5 (better 12...a6=+) 13.Ne5?? (better 13.Nh4=) 13...Ne5–+ 14.f4 Ned7 15.cd5 (15.e4 d4–+) 15...Nd5 (worse 15...Bd5 16.e4 Bb7 17.d4–+) 16.Ne4 (16.Nc4–+) 16…Ne3 (16...Ne3 17.Qc3 Nf6–+) 0–1. GuestVHHX – GuestZMFG, freechess.org, 2017.

8.Be2 Bb7 9.d3 a6 10.a4 Nbd7 (10...dc4 11.Qc4 Bd6 12.0–0=+) 11.Nc3 (11.Na3 ab5 12.ab5 Bd6=) 11...a5 (11...d4 12.ed4 cd4 13.Nd4 Bg2 14.Rg1=+) 12.0–0–0 (12.0–0 Bd6=) 12...Ng4 (12...Bd6 13.h3=+) 13.Rdf1 dc4 14.dc4 Bg5 (14...Qc7 15.h3 Nge5 16.Ne5 Ne5 17.f4=) 15.Ng5 Qg5 16.Bf3 Rab8 (16...Bf3 17.gf3 Ngf6 18.Ne4=) 17.Bb7 Rb7 18.Ne4 Qe7 19.h3 (19.Rd1 Rd8=) 19...Ngf6 (19...Nh6 20.Rd1=) 20.Ng5 (20.Rd1 Ne4 21.Qe4 Rc7+=) 20...h6 (20...e5 21.Ne4=) 21.Nf3 e5 22.g4 e4 23.Nh4 (23.g5 ef3 24.gf6 Nf6=) 23...Ne5=+ 24.Nf5 Qe6 25.Rd1 (25.Be5 Qe5 26.Rd1 Qa1 27.Kd2 Rd7 28.Ke2 Qe5=+) 25...Nd3 26.Kb1 Rd7 (26...Rd8 27.f3=+) 27.f4 Rfd8 (better 27...Nb2 28.Kb2 Rfd8=+) 28.g5?? (28.Ng7 Kg7 29.g5 hg5 30.fg5 Nb2 31.gf6 Qf6 32.Rhg1 Kf8 33.Rd7 Rd7 34.Qb2 Qb2 35.Kb2 Rd2 36.Kc1–/+) 28...Qf5 (28...Nb2!? 29.Rd7 Nd7 (worse 29...Rd7 30.Nh6 gh6 31.gf6–/+; 29...Qd7?! 30.Nh6 gh6 31.gf6=) 30.Ng7 Kg7 31.gh6 Qh6 32.Kb2 f5–+) 29.gf6–/+ g6 30.Ba1 (30.Rd2 Nb2 31.Rd7 Qd7 32.Kb2 Qd6–/+) 30...Qe6 (better 30...Nb4 31.Rd7 Qd7–+) 31.Rhf1 (better 31.Rd2!?–/+) 31...Nb4 32.Rd7 Qd7 (32...Nc2 33.Rd8 Kh7 34.Bb2 Ne3 35.Rc1–+) 33.Qc3 (better 33.Qe4 Qd2 34.Bb2–+) 33...Qh3 34.Re1 (34.Rc1–+) 34...Qg2 35.Bb2 (35.Qb3 Rd3 36.Qb2–+) 35...Rd3 36.Qc1 Rd2 (better 36...Rb3 37.Rd1 Nd3–+) 37.Rd1 (37.Qc3 Rb2! 38.Qb2 Qb2 39.Kb2 Nd3 40.Kc3 Ne1 41.Kd2–+) 37...Rc2 38.Rd8 Kh7 39.Qd1 Rb2 40.Ka1 Ra2 (40...Ra2 41.Kb1 Qb2) 0–1. Diviak,Rudolf (1850) – Barca,Michal (1825), liga 3A2, 2013.

8.Ng5 Nbd7 9.Bd3 h6 10.h4 (10.Nh7 Re8+=) 10...Bb7 (worse is 10...hg5 11.hg5 Re8 12.gf6 Bf6 13.Bf6 Nf6 14.Nc3=) 11.f3 (11.cd5!? Bd5 12.Nf3+=) 11...Qc7 (11...hg5 12.hg5 Ne4 13.cd5 Ng5 14.Bh7 Kh8 15.f4 Nf3 16.gf3 Bh4 17.Ke2 Bd5 18.Nc3 Bc4 19.Bd3 Bd3 20.Qd3+–) 12.cd5 ed5 (12...Bd5 13.Rh3–/+) 13.Bf5 d4 (13...Rfe8 14.Kd1–/+) 14.Bh7 (14.ed4 Rfc8 (worse is 14...hg5 15.hg5 Qg3 16.Kf1+=) 15.Rh3 cd4 16.Qc7 Rc7–/+) 14...Kh8–/+ 15.Rh3 Rae8 (worse is 15...hg5 16.hg5 Rfc8 17.gf6 Bf6 18.Na3+=) 16.Bd4 Bd6 (16...Qd6 17.Bb2=) 17.Bb2 (17.Bc3 Nd5 (worse is 17...hg5 18.hg5 Bg3 19.Kd1+–) 18.Be4 f5 19.Bf5 A) 19...hg5 20.hg5 Kg8 21.Bd7 Bg3 22.Kf1 Nc3 23.Be8 (23.Nc3?! Qd7 24.Rg3 a6+–; 23.Qc3?! Qd7 24.Rg3 Qb5 25.Ke1 Bd5+/–; 23.dc3?! Qd7 24.Rg3 Re3+/–) 23...Re8 24.Nc3+– (worse is 24.Qc3 Bc8+–; 24.dc3?! Re3 25.Na3 Qf4 26.Qb3 c4 27.Qc4 Qc4 28.Nc4 Rc3+–); B) 19...Bg3 20.Kd1 Re3=) 17...Re7 (17...Be5 18.Be5 Re5=) 18.Bf5+= Bg3 19.Kf1 Be5 20.Nc3 Rfe8 21.Bd7 (better is 21.f4 Bc3 22.Qc3+= (worse is 22.dc3 Kg8–/+)) 21...Qd7+= 22.a4 Bd5 (22...Kg8 23.Nge4–/+) 23.Rd1 Bc4 24.d3 Bd5 25.Nd5? (better is 25.Kf2!?=) 25...Nd5–/+ (25...Qd5?! 26.d4 Rd8 27.Ne4+=) 26.Bc1 Nb4 (worse is 26...hg5 27.hg5 Kg8 28.d4=) 27.Qb1 hg5 28.hg5 Kg8 29.d4 g6 30.Qb3 Rd8 31.Rd2 Bg7 32.dc5 Nd3 33.c6 Re3 34.Rd1= Qd4 35.Qc2 Re1 36.Re1 Ne1 37.Qe4 Nd3 38.Qd4 Rd4 39.Be3 Ra4 40.f4 Nb2 41.Bc5? Rf4–+ 42.Ke2? Re4 43.Re3 Re3?? 44.Be3+– Be5 45.Bd4! Bc7 46.Bb2 Kf8 47.Bf6 Ke8 48.Kf3 Bd6 49.Ke4 Bg3 50.Kd5 Bf4 51.g4 Bc7 52.Be5 Kd8 53.Ke4 Kc8 54.Bc7 (54.Bc7 f5 55.gf6 Kc7 56.f7 a6 57.f8Q ab5 58.Qe8 Kd6 59.Kd4 Kc7 60.Qd7 Kb8 61.Qb7) 1–0. Vuori,Raimo – Nokso_Koivisto,Aki, VIII JSM/M/3 corr/Ks FIN, 1983.

8.Ng5 g6 9.Qc3 (9.Be2 a6=) 9...Bb7 10.h4 (10.cd5 Qd5 11.Nf3 a6=+) 10...d4 (10...dc4!? 11.Qc4 Bd5=+) 11.ed4= cd4 12.Qd4 Qd4 (12...h6 13.Nh3=) 13.Bd4+= Rd8 14.Bc3 (14.Bf6!? Bf6 15.Nc3=) 14...h6 15.Nh3 Ne4 (15...a6 16.a4=) 16.Nf4 (16.h5 g5=) 16...Bc5 (16...Nc3 17.Nc3 Rd4 18.Nh3=) 17.f3 (17.Nh3 a6=) 17...Bf2 18.Kd1? (better 18.Ke2!? Ng3 19.Kf2 Nh1 20.Ke1=) 18...Ng3–/+ 19.Rh3 Nf1 20.Ke2 Bg3 21.Bf6 Bf4 22.Bd8 Be5 23.Nc3 Ng3 24.Kf2 Nf5 25.g4 Nd4 (25...Nd6 26.h5–/+) 26.h5 (26.Be7 a6 27.Re1 Nd7–/+) 26...g5 (26...Nd7 27.Be7–/+) 27.Re1 (better 27.Be7!?–/+) 27...Nd7–+ 28.Be7 (28.f4 Bf4 (28...Rd8?! 29.fe5 Rc8 30.Rd3 Rc4 31.Ne2–/+) 29.Rd3 e5–+ (29...Rd8?! 30.Rd4 e5 31.Rd3–+)) 28...Re8 (28...Rc8 29.f4 Bf4 30.d3–+) 29.Bb4 Nc2 (29...Rc8 30.d3–+) 30.Rb1 Rc8 31.Ne4 (better 31.Rb2 Rc4 32.Rc2 Rb4 33.a3–+) 31...Rc4 32.Nd6 (32.Bc3 Be4 33.fe4–+) 32...Nb4 (better 32...Rb4 33.Rb4 Bd6–+ (33...Nb4?! 34.Nb7 Nc5 35.Nc5 bc5 36.f4 Bf4 37.Ra3–+)) 33.Nc4–/+ Nd3 (33...Bd4!? 34.Ke2 Na2–/+) 34.Ke3=+ Nf4 35.Ne5 (35.Rhh1 Kg7=+) 35...Ne5–/+ 36.Rg3 Nc4 37.Kf2 Nd3 (worse 37...Nd2 38.Rd1 Nc4 39.Rd7=+) 38.Kg1 Nde5 39.Rc1 (better 39.d3 Nd2 40.Rd1 Ndf3 41.Kf2–/+) 39...Bd5 (better 39...Nd2 40.f4 gf4–+) 40.Rc2 (better 40.d4!? Nd3 41.Rc3=) 40…Na3 (40...Nd6 41.a4 Nf3 42.Kf2–+) ½–½. Tuchtenhagen,Harald – Seifert,Ulf, Mecklenburg LL, 1994.

7.Qc2 Nbd7

8.Bd3 dc4 9.Bc4 Nb6 10.Ng5=.

8.Bd3 Re8 9.0–0= dc4 10.Bc4 Nb6 11.Be2=.

8.Bd3 Re8 9.0–0= Nf8 10.Nc3 Ng6 11.Ne2 Bd6 12.Bg6 hg6 13.Ne5 Be5 14.Be5 dc4 15.Qc4 b6 (15...Qd2 16.Rfd1 Qb4 17.Qb4 cb4 18.Rab1+=) 16.Nf4 (16.d4 cd4 17.Rad1 a6 18.Nd4 Qd5+=) 16...Bb7 17.Rfd1 Qe7 18.Qe2 Red8 19.Nh3 (19.d4 cd4 20.Rd4 a6+=) 19...Rd5 20.f4 (20.d4 cd4 21.Bd4 a6+=) 20...Rad8 (20...a6 21.e4 Ne4 22.Qe4 Rd2 23.Qe3 Rg2 24.Kf1 Rh2 25.Nf2–/+) 21.Ng5 (21.d3!?+=) 21...Rd3= 22.a4 Ne4 (22...Qd7 23.e4=+) 23.Ne4= Be4 24.a5 Qd7 25.ab6 (25.Ra4 Bf5 26.e4 Qb5+/–) 25...ab6 26.g4? (26.Ra4 Bf5 27.e4+/–) 26...Qb5 27.Bc7 R8d7 28.Rab1 Qc6 29.Bb6 Bf3 30.Qf2 (30.Qe1 Bd1 31.Qd1 Rd2 32.Qf1–+) 30...Bd1 31.Ba5 (31.Bc5 Bg4 32.Rb8 Kh7–+) 31...Qa8 32.Qh4 (32.Rd1 Qa5 33.Qf3 Rd2–+) 32...Qa5 (33.Rd1 Rd2–+) 0–1. Van der Zee,C – Van Vuure,J, Accom hoofd, 1988.

8.d4 b6 9.Nbd2 Bb7 10.Bd3 h6 11.0–0 Re8 12.a4 (12.Rfe1 cd4 13.ed4 dc4 14.Bc4 Bb4=) 12...Rc8+= 13.Rfd1 Bd6 14.Qb1 cd4 15.ed4 Bb8 (15...Bf4 16.cd5 Bd5 17.g3+=) 16.Qa2 (16.Ne5 Be5 17.de5 Ng4+=) 16...dc4 (16...Ne4 17.g3–/+) 17.Bc4+= (17.Nc4? Bf3 18.gf3 Nd5–+) 17...Nd5 18.Ne5 (18.g3 Qf6+=) 18...N7f6 (better is 18...Nf4!? 19.Nc6 Qg5–/+) 19.Rac1 Nf4 20.Bf1? (better is 20.Nc6!? Bc6 21.bc6 Rc6 22.g3+=) 20...Rc1–/+ 21.Rc1?? (better is 21.Bc1 Qd4 22.Bb2 Nh3 23.gh3–+) 21...Be5–+ 22.de5 (22.Qc4 Bd6 23.g3 Ng4–+) 22...N6h5 (better is 22...Qd2 23.Qb3 Ng4–+) 23.Nc4 (23.Nf3 Nh3!! 24.Kh1 Bf3 25.Qa3 Nf2 26.Kg1–+) 23...Nh3 (23...Bg2 24.Ne3 Nh3 25.Kg2 Qg5 26.Kf3 Ng1 27.Ke4 Rd8–+) 24.Kh1–/+ Nf2 (24...Nf2 25.Kg1 Nd3–/+) 0–1. Feofanov,Alexander – Dudko,Gennady, Final Omsk, 2010.

8.d4 cd4 9.ed4 dc4 10.Bc4 Nb6 11.Bd3 Black has a cramped position 11...Nbd5 12.Nbd2 (12.0–0 h5=) 12...Nb4 13.Qb1 Nd3 14.Qd3 a6 15.a4 (15.0–0 ab5 16.h4 Ng4=+) 15...ab5=+ 16.ab5 Ra1 17.Ba1 Bd7 18.0–0 Qa5 Attacking the isolated pawn on b5 19.Rb1 Rc8 20.b6 (20.Ne5 h6=) 20...Nd5 (20...Ba4 21.Nc4 Qa6 22.Nce5 Qd3 23.Nd3=+) 21.Nb3 (21.Ne5!? might be a viable alternative 21...Bb5 Deflection: a1 22.Qb5 Qb5 23.Rb5 Rc1 24.Nf1 Ra1 25.g3=+) 21...Qa3 22.Bb2 Qa2 23.Nfd2 Nb4 (23...Bc6 24.Qg3–/+) 24.Qf1 (24.Qg3 g6=+) 24...Rc2 Black threatens to win material: Rc2xb2 (24...f6 25.Bc1–/+) 25.Nc1 (25.Bc1!?=+ must be considered) 25...Qd5 26.Nf3 (26.Ncb3 h6–/+) 26...Qe4 (26...Bb5 27.Qe1 Nc6 28.h3–+) 27.Ba3 (27.Ne5!? Be8 28.Nb3–/+) 27...Rf2!–+ Discovered attack: c2, e4–b1 28.Qf2 (28.Qf2 Qb1 Discovered attack; 28.Kf2 Qb1 Discovered attack (28...Qc2 Decoy)) 28...Qb1 29.Qb2 (better 29.Qf1!?–/+) 29...Qb2–+ 30.Bb2 Nd5 31.Ne5 Bb5 32.Nb3 Nb6 33.Nc5 Ba6 (better 33...f6!? 34.Ng4 Na4 35.Na4 Ba4 36.Kf2–+) 34.Na6 ba6 35.Kf2 f6 36.Nc6 Bd6 (36...Kf7 37.g3–+) 37.Bc3 (37.Nd8 Bh2 38.g3 Nc4–/+) 37...Nd5 (37...Bh2?! 38.g3 Kf7 39.Kg2=) 38.Ba5 (38.Bd2 Kf7–+ (38...Bh2?! 39.g3=)) 38...Kf8 39.h3 Ke8 40.Bd2 Kd7 41.Na5 Bb8 42.Ke2 h5 43.Nb7 (43.Kd3 Bc7–+) 43...Ba7 44.Kd3 Kc7 (44...Bb6 45.Nc5 Bc5 46.dc5–+) 45.Na5 Kb6 46.Kc4 Bb8 47.g4 (47.Nb3 Bd6–+) 47...hg4 48.hg4 Bf4 49.Bf4 Nf4 50.Nb3 Nd5 51.Nc5 Nc7 52.Nd3 (52.Kc3 Kb5 53.Ne4 a5–+) 52...Kc6 53.Nf4 Kd6 54.Nh5 Ne8 55.Ng3 a5 56.Ne4 (56.Kb5 Kd5–+) 56...Kc6 57.Nc5 Nd6 58.Kd3 Kd5 59.Nd7 (59.Na4 f5 60.Nc3 Kc6–+) 59...Nb7 (59...Nc4 keeps an even firmer grip 60.Nf8 e5 61.Ng6 e4 62.Kc3–+) 60.Nb6 (better 60.Kc3–+) 60...Kc6 61.Na4 g6 (61...g5 makes it even easier for Black 62.Nc3 Nd6 63.Ke2–+) 62.Nc3 (62.Ke3 f5–+) 62...f5 (62...Nd6 might be the shorter path 63.Ne2 g5 64.Nc3–+) 63.g5 Nd6 64.Ke3 Ne4! doomsday 65.Ne2? (65.Ne4 fe4 Passed pawn) 65...Ng5 66.Nf4 Kd6 67.Ng6 a4 68.Ne5 Kd5 69.Nd7 (69.Nd3 there is nothing better in the position 69...a3 70.Nb4 Kc4 71.Na2–+) 69...a3 70.Nc5 (70.Nb6 hardly improves anything 70...Kc6 71.Nc4 a2 72.Na5 Kd5–+) 70…Kc4 (70...Kc4 71.Kf4 a2 72.Kg5 a1Q 73.Ne6 Qb1–+) 0–1. Larios Villa,Francisco Javier – Rodriguez,Tomas, Sants op, 2001.

8.d4 Ne4 9.Bd3=.

8.Be2 b6 9.d3 Bb7 10.Nbd2 Qc7 11.0–0 a5 (11...a6 12.a4=) 12.Rfe1 Rad8 (12...Bd6 13.h3=) 13.h3 Rfe8 (13...Bd6 14.Rac1=) 14.Rac1 Bd6 15.Bf1 (15.d4 cd4 16.ed4 Qb8=) 15...dc4 (15...Ne5 16.Be2=) 16.Qc4 (16.Nc4 Bf3 17.gf3 Nd5=) 16...Ne5 17.Ne5 Be5 18.d4 Bh2 19.Kh1 Bd6 20.Bd3 (20.Qa4 Qe7 21.Nc4 Ne4=) 20...Qe7 (20...Qd7 21.dc5 Bc5 22.Bf6 gf6 23.Be4 Qd2 24.Bb7 Qf2 25.Bc6–/+) 21.Qc2 Rc8 (21...cd4 22.Bd4 Bb4 23.Nc4 (worse is 23.Bb6 Rd6–/+) 23...Be1 24.Re1+=) 22.Nc4 (22.dc5 Bc5 23.Nc4=) 22...Bb8 (better is 22...cd4!? 23.Bd4 e5=) 23.f4+/– Nd5 24.Bh7 Kh8 25.Bd3 (25.Qb1 f5 26.Bg6+/–) 25...Qh4+= 26.Kg1 Nb4 (better is 26...Red8 27.Qf2 Qf2 28.Kf2 cd4 29.Bd4 Nf4+/–) 27.Qb1?? (27.Qd2 Nd3 28.Qd3 Rcd8+/–) 27...Nd3?? (better is 27...cd4 28.Bd4 Red8–/+) 28.Qd3+/– Qg3 29.Qe2 cd4 30.Bd4 Rcd8 31.Bb6 Rd5 32.a4 Rg5+/– 33.Red1?? Bg2 34.Qe1 Qh3 35.fg5 Qh2 (35...Qh2 36.Kf2 Be4 37.Kf1 Qg2#; 35...Bh2 36.Kf2 Qf3#) 0–1. Dzieniszewski,Andrzej – Walkewitz, Potsdam, 1985.

7.Nc3 a6

8.a4 Nbd7 9.Be2 dc4 (9...Nb6 10.cd5 ed5 11.Qc2=+) 10.Bc4 Nb6 11.Be2 Nbd5 12.0–0 ab5 13.ab5 Ra1 14.Qa1 b6 15.Ne5 Bb7 16.Bf3 (16.Nd5 Bd5 (16...Qd5? 17.Bf3 Ne4 18.d3+–) 17.d4 Qc7=) 16...Nc3 (16...Qc7!?=+) 17.Bc3+= Bf3 18.Nf3 Qa8 (18...Qd3 19.Ne5 Qb5 20.Rb1=) 19.Qb2 (19.Ne5 Qd5+=) 19...Qd5 (19...Qb7 20.Ra1=) 20.Ne5 (20.Ra1 Ra8 21.Ra6 Bd8+=) 20...Bd6 (20...Ne4 21.Nc6 Re8 22.Bg7 Qd2 23.Qe5+=) 21.Nc6+= Qh5 22.h3 Qg5 (22...Qe2 23.Bf6 gf6 24.f4+=) 23.Bf6 gf6 24.d3 (24.f4!? Qf5 25.Ra1+–) 24...Ra8= 25.f4 Qh4 26.Kh2 Kh8 27.g3 Qh6 28.Qg2 Ra3 29.Qe2 (29.Qc2!?=) 29...Qg6=+ 30.e4 (30.Rd1 Kg7=+) 30...c4–/+ 31.Rf3? (better 31.Rd1!?–/+) 31...Qh5–+ 32.Qb2?? (better 32.Nd4 Qc5 33.Nc2 cd3 34.Rd3 Rd3 35.Qd3 Qf2 36.Kh1–+) 32...c3 (32...Qf3?! 33.Qf6 Kg8 34.Qd8 Bf8 35.Qg5 Kh8 36.Qf6 Kg8 37.Qg5 Bg7 38.Qd8 Bf8 39.Qg5=) 33.Qg2 Qb5 (better 33...Qf3! 34.Qf3 Ra2 35.Kg1 Ra1 36.Kg2–+) 34.Nd4 Qc5 35.Nc2 Ra2 36.e5 (36.d4 Qc6 37.h4 b5–+) 36...Be7 37.d4 Qc6 38.Qe2 (38.Rf2 Qg2 39.Kg2 fe5 40.fe5–+) 38…Rc2! (38...Rc2 39.Qc2 Qf3–+) 0–1. Matveenko,Yury (2185) – Klimova,Maria (1900), Voronezh Championship Final, 2010.

8.Qa4 b6 9.cd5 ed5 10.Be2 Bb7 11.ba6.

8.Bd3 ab5 9.Nb5 Nc6 10.a3 Na5 11.cd5 ed5 (11...Qd5 12.Bh7 Nh7 13.Nc7+=) 12.Ne5 Ne4 13.Qc2 f6 14.Nf3 f5 15.0–0 Bd7 16.Be2 c4 17.Nbd4 Bd6 18.d3 cd3 19.Qd3 Nc4 20.Rfd1?? (better is 20.Qb3 Nc5 21.Qc2+=) 20...Nb2–+ 21.Qb3 Nd1 (21...Nd1 22.Qd5 Kh8 23.Bd1 Qc7–+ (worse is 23...Ba3 24.Ne5–+)) 0–1. Dopper,Johan C – Van Melis,ALM, Netherlands email ch KE02, 1999.

7.Nc3 b6

8.a4 Bb7 9.cd5 Nd5 10.Be2 Bf6 11.0–0 Nd7 12.Qb1 Nc3 13.dc3 Qc7 14.Rd1 (14.Qc2 Rad8=) 14...Rfd8+= 15.Qc2 (15.Nd2 g6+=) 15...Ne5 16.Ne5 (16.Ne1 h6+=) 16...Be5 (16...Qe5 17.Bd3 g6 18.Qe2+=) 17.h3 ½–½. Skerlik,Stanislav – Henk,Martin, corr ICCF EU/M99, 2001.

8.d4 Bb7 9.Be2 Nbd7 10.0–0 Rc8 11.cd5 Nd5 12.Nd5 Bd5 13.Qa4 (13.Rc1 cd4 14.Nd4 Rc1 15.Qc1 Nc5=) 13...Rc7 (13...cd4 14.ed4 Qc7 15.Rac1=) 14.dc5 (14.Rac1 Qa8=) 14...Nc5=+ (worse 14...Bc5 15.Rac1+=) 15.Qg4 Bf6 16.Bd4 (16.Ne5 Nd7 17.Nd7 Rd7 18.Bf6 Qf6=+) 16...Qe7 (16...Bd4 17.Nd4 e5 18.Nf5=+) 17.Ne5 Rfc8 (17...Nd7 18.Nd7 Rd7 19.Rfd1=+) 18.Bf3 (18.Rad1 Ne4=) 18...Be5 (18...Nd7 19.Nc6 Bc6 20.bc6=) 19.Be5 f5 20.Qg3 Rd7 21.Bd5 Rd5 22.Rac1 Rcd8 23.f3 R5d7 (23...Nd3 24.Rc7 R5d7 25.Rc4=+) 24.Bd4 (24.Rc4 Rd2 25.a4 R8d5=) 24...Nd3 25.Rc6? (better 25.Rc3=) 25...e5–+ 26.Ba1 (26.Bc3 f4 27.Qg4 fe3–+) 26...f4 27.ef4? (better 27.Qg4 h5 28.Qf5 fe3 29.Qe4–+) 27...ef4 28.Qg7 Qg7 29.Bg7 Kg7 30.g4 (30.Rd1 Ne5 31.Rd7 Rd7–+ (31...Nd7?! 32.Rd6–+)) 30...Ne5 (30...Re8 31.Rc4 Re3 32.h3–+) 31.Rc2 (31.Re6 Rd5–+) 31...Rd2 32.Rc7 (32.Rd2 Rd2 33.Rf2 Rd5–+) 32...R8d7 (better 32...Kg6!? 33.Rc3–+) 33.Rd7 Rd7 (worse 33...Nd7 34.Re1–+) 34.Rf2 Nc4 (34...Rd5 35.a4–+) 35.h4 (35.Re2 Ne3 36.Kf2 Kg6–+) 35...Rd2 36.Rd2 Nd2 37.Kg2 0–1. Komidzierski,Eugeniusz (2000) – Blernat (Biernat?),Stanislaw (1800), Rowy Seniors op 7th, 2003.

8.cd5 ed5 9.d4 Bb7 10.Be2 Nbd7 11.0–0 Re8 (11...c4 12.Qc2=) 12.Rc1 (12.dc5 bc5 13.Qc2 Qb6+=) 12...Bf8 (12...c4 13.Re1=) 13.a4 (13.dc5 bc5 14.a3 Qb6+=) 13...c4= 14.Qc2 Rc8 15.Ra1 (15.Qf5 Bb4=) 15...Bd6 16.Ba3 Bb8 17.Qf5 Nf8 (17...Ne4 A) 18.Nd5? g6 19.Ne7 Qe7–+ (19...Re7?! 20.Be7 Qe7 21.Qh3–+); B) 18.Rfc1=) 18.Bf8 (18.Bb4 Qd7 19.Nh4 Ne6+=) 18...Rf8 19.Ne5 Qd6 20.f4 (20.a5 ba5 21.Bf3 Qe6=) 20...Rcd8 21.g4 Ne8 22.Qc2 (22.Bf3 g6 23.Qc2 f6=) 22...Qe7 (22...f6 23.Nc6 Bc6 24.bc6 Qc6 25.Bf3–/+) 23.Rf3 g6 (23...Qe6 24.Qf5=) 24.Rh3 (24.g5 Be5 25.fe5 Qg5 26.Kh1 f6=) 24...Be5 25.fe5 f6 26.ef6 Rf6 27.Rg3 (27.Qd2 Nd6+=) 27...Kg7 (27...Nd6 28.a5+=) 28.Rf1 (28.Bf1 Rf7=) 28...Re6 (28...Nd6 29.a5+=) 29.Qc1 (29.e4 de4 30.Bc4 Rf6+=) 29...Nd6 30.Rgf3 Re8 31.Nd1 Re4 (31...Ne4 32.Rf4=+) 32.h3 (32.R3f2 Qg5=+) 32...Qg5 33.Qa3 R4e6 34.Rf4 R8e7 35.Kh2 Ne4 36.Rf8? (better 36.Qc1–/+) 36...Qh4–+ 37.R1f3 Ng5 38.R3f6?? (38.R8f4 Nf3 39.Bf3–+) 38...Qh3 (38...Rf6 39.Qe7 Kh6 40.Rf6 Qh3 41.Kg1 Qg3 42.Kf1 Qh3 43.Ke1 Qh4 44.Nf2+–) 39.Kg1 Qg3 (39...Rf6?! 40.Qe7 Nf7 41.Rf7 Rf7 42.Qe5 Kf8 43.Qb8 Bc8 44.Qc8 Kg7 45.Qb8=) 40.Kh1 Qh4 (better 40...Qe1 41.Rf1 Qe2–+) 41.Kg2 Qh3 (41...Qe1 42.Rf2 Ne4 43.Qb2–+) 42.Kg1 Qg3 (42...Rf6?! 43.Qe7 Nf7 44.Rf7 Rf7 45.Qe5 Kf8 46.Qb8 Bc8 47.Qc8 Kg7 48.Qb8=) 43.Kh1 Nh3 44.Rf1 Qd6 (better 44...g5 45.R8f6 Nf4–+) 45.Qc3? (better 45.Qd6 Rd6 46.Rb8–/+) 45...Ng5 46.Qe1 Rf7 (better 46...Nf7 47.R1f7 Rf7 48.Rf7 Kf7–+) 47.R8f7 Nf7 48.Qh4 Qe7 49.Qg3 Qd6 50.Qh4 Rf6 51.Rg1 (better 51.Rf6!? Qf6 52.Qg3–/+) 51...g5–+ 52.Qg3 Qg3 (52...Qb4!? 53.Kh2–+) 53.Rg3 Nd6 54.Bf3 Re6 55.Kg2 Ne4 56.Be4 Re4 57.Nc3 Re6 58.Rf3 Rf6 59.Rh3 h6 60.Rh1 Kf7 61.Kg3 Ke6 62.Re1 Kd6 63.Rh1 Re6 64.Re1 Bc8 65.Kf3 Rf6 66.Kg3 Rf7 (66...Rf8 67.Rh1 Rh8 68.Rh2–/+) 67.Rh1=+ Rf6 68.Re1 Be6 69.Rh1 Ke7 70.Re1 Kf7 71.Rh1 Kg6 72.Nd1 Bg8 73.Nc3 Rd6 74.Rh5 (74.Rf1 Rd7–/+) 74...Bh7 (74...Re6!? 75.Kf3 Rf6 76.Kg3–+) 75.Rh2 Kg7 76.Rf2 Bg6 ½–½. Bender,Wolfgang (1955) – Naeckel,Gerhard (1775), 1.Saarlouis op, 1998.

7.Nc3 Nbd7

8.Bd3 Nb6=.

8.Be2 b6 9.0–0 Bb7 10.cd5 ed5 11.Qc2 Qc7 12.Rac1 Rac8 13.Nb1 Rfe8 14.d3 (14.Qf5 Bd6 15.Rfe1 Re7 16.Bd4 Rce8 17.Bd3 Qb8) 14...Qb8 15.Nbd2 Bd6 16.g3 Ng4 17.Nh4 Ngf6 18.Bf3 Be5 19.Rfd1 Bb2 20.Qb2 Ne5 21.Be2 Re6 22.d4 Neg4 23.Bf3 c4 24.Bg2 a6 25.ba6 Ba6 26.Rc3 Rce8 27.Nf5 (27.Nhf3 Nd7 28.Ng5 Rg6 29.Nh3 b5 30.Nf4 b4=) 27...g6 28.Nh4 Qd6 29.a3 Qe7 30.Nhf3 Nf2 (30...Rd6 31.Re1 b5 32.Rb1 Nd7 33.h3 Ngf6 34.Ng5 Nb6 35.Qb4 Kh8) 31.Kf2 Ng4 32.Kg1 Ne3 33.Rb1 (33.Rdc1 Ng2 34.Kg2 Bb7 35.Kh1 Qf6 36.Rf1) 33...Ng2 34.Kg2 g5 35.Ng1 g4 (35...Qf6 36.Rf3 Qg6 37.Kh1 Qh5 38.Rc3 Qg4 39.Ngf3 Bb7 40.Qb5 Kh8) 36.Rf1 Bc8 (36...Qg5 37.Kh1 h5 38.Qc2 h4 39.Rf5+/–) 37.Kh1 Rh6+– (37...Re1 38.Re1 Qe1 39.Rc1 Qe3 40.Qc3 Bf5 41.Kg2 Be4 42.Ne4; 37...Bd7 38.Rf4 Rf6 39.Rf6 Qf6 40.Rc1 Re3 41.Rf1 Qg6) 38.Qb5 Bd7 39.Qb1 Qg5 40.Rf4 (40.Rf2 Rf6 41.Rg2 Rfe6 42.Rf2 (42.Qf1 Re1 43.Qf4 Qf4 44.gf4 Kf8) 42...Rf6 43.Rg2 Rfe6=) ½–½. Dopper,Johan – Gross,Wilhelm, corr 3GMM½–06, 1997–99.

8.h4 Nb6+= 9.d3 (9.Qb3 Bd7+=) 9...Ng4 (9...d4 10.ed4 cd4 11.Nb1–/+) 10.Be2+= f5 11.cd5 Nd5 (11...ed5 12.g3–/+) 12.Qb3+= Bf6 (12...a6 13.d4 ab5 14.dc5 Nc3 15.Bc3 Bc5 16.0–0=) 13.Rc1= b6 14.d4 Nde3 (better is 14...Bb7 15.dc5 bc5 16.Nd5 Bd5 17.Bf6 Qf6=) 15.fe3+/– Ne3 16.dc5 Ng2 (16...bc5 17.Na4 Bb2 18.Nb2 Ng2 19.Kf2 Nf4+/–) 17.Kf1 (better is 17.Kf2 Nh4 18.Rcd1+–) 17...Ne3+= 18.Kf2 Bd4 (better is 18...Ng4!? 19.Kg2 bc5+=) 19.c6+– (19.Nd4?! Qd4 20.c6 Qf4 21.Bf3 Ng4 22.Kg2 Ne3 23.Kf2 Ng4 24.Kg2 Ne3 25.Kf2=) 19...Kh8 (19...Qd6 20.Nd4 Qd4 21.Rcg1 Nd1 22.Kg2 Qf2 23.Kh3 Nb2 24.Rg3+– (24.Qb2 f4 25.Rg4 h5+=)) 20.Na4 Ng4 21.Ke1 Be3 (21...Bf2 22.Kf1 Be3 23.Rd1+–) 22.Rd1 Qc7 23.Ne5! Bf2 (23...Ne5 24.Qc3 Double attack (24.Qe3 Deflection; 24.Qc3 Decoy)) 24.Kf1 a6 25.Nd7 ab5 26.Nf8 ba4 27.Ne6 Be6 (27...ab3?? 28.Nc7 Bh4 29.Bg4+–) 28.Qe6 Bc5 (28...Qf4 29.Bg7! Kg7 30.Qe7 Kh8 31.Rd8 Rd8 32.Qd8 Kg7 33.Qg5 Qg5 34.hg5 Bg3 35.Bg4 fg4+–) 29.Rd7 Qf4 (29...Ne3 30.Qe3! Qd7 (30...Be3?? 31.Bg7 Kg8 32.Bc4) 31.Qc5 bc5 32.cd7 Rd8+–) 30.Kg2 Bf8 31.Bd4 1–0. Kuhlmann,AEJ – Blees, 1986.

7.d4 a6

8.a4 ab5 9.ab5 Ra1 10.Ba1 Ne4 11.Bd3 Nd7 12.Nfd2 f5 13.0–0 Bf6 14.Nb3 b6 15.f3 Nd6 16.N1d2 Bb7 17.Qc2 Qe7 18.Re1 Rc8 19.e4? (19.dc5 Nc5 20.Nc5 Rc5 21.Bf6 Qf6=+) 19...de4 (better 19...fe4!? 20.fe4 dc4–+) 20.fe4= cd4 21.Bd4 Nb5 22.Bf6 Qf6 (worse 22...Nf6 23.ef5 Nc7 24.fe6 Ne6 25.Bf5+=) 23.ef5 Nd4 24.Nd4 Qd4 25.Kf1 ef5 (better 25...Ne5!? 26.Be2 ef5–+) 26.Bf5=+ Rf8 27.Ke2? (better 27.Nf3 Bf3 28.gf3=+) 27...Qe5–+ 28.Be4 Nc5 29.Kd1 Be4 30.Ne4 (30.Re4 Qa1 31.Qc1 Qc1 32.Kc1 Ne4 33.Ne4–+) 30...Rd8 31.Nd2 Qa1 (worse 31...Qh2 32.Qf5 Qg2 33.Re2 Qh1 34.Kc2–+) 32.Ke2 Re8 33.Ne4 Re4 34.Qe4 Qe1!! (34...Ne4? 35.Ra1 Nc5 36.Rd1+–) 35.Ke1 Ne4 36.Ke2 Kf7 37.Kd3 Nc5 38.Kd4 Ke6 39.g4 g5 40.h3 h6 41.Kc3 Ke5 42.Kb4 Kd4 (42...Kf4!? 43.Kb5 Nd7 44.Kc6 Ne5 45.Kb6 Nc4 46.Kc5–+) 43.Kb5 Nd7 44.Kc6 Kc4 45.Kd7 b5 46.Ke6 b4 47.Kf6 b3 48.Kg6 b2 49.Kh6 b1Q 50.Kg5 Qh7 51.h4 Kd5 52.h5 (52.Kf4 Kd4 53.Kf3 Qe4 54.Kf2 Qf4 55.Kg2 Ke3 56.Kh1 Qf1 57.Kh2 Kf3 58.h5 Qg2) 52...Ke4 (52...Ke5 53.h6 Qf7 54.Kh4 Qf2 55.Kh5 Kf6 56.g5 Kf5 57.g6 Qh2) 53.h6 (53.Kf6 Qh6 54.Kf7 Ke5 55.Kg8 Kf6 56.g5 Qg5 57.Kf8 Qg7 58.Ke8 Qe7) 53...Ke5 54.Kh5 Kf4 55.g5 Kf5 (55...Qf5 56.h7 Qh7) 56.Kh4 Qc7 57.g6 (57.Kh3 Kf4 58.Kh4 Qd7 59.Kh5 Qf5 60.h7 Qh7) 57…Qh2 0–1. Alexiev,Peter – Brindza,Istvan (2070), HUN–chT2 Toth, 2005.

8.a4 Nbd7 9.Bd3 (9.cd5 ed5 10.dc5 Nc5=) 9...Nb6 10.cd5 (10.dc5 Nc4 11.Bc4 dc4 12.Qd8 Rd8=+) 10...c4 (10...Nfd5 11.dc5 Nb4 12.Bh7 Kh7 13.Bg7 Qd1 14.Kd1–/+; < 10...ed5 11.dc5 Bc5 12.Nbd2+=; < 10...Qd5 11.Nc3 Qh5 12.a5+=) 11.Bc2 ab5 (11...Nbd5 12.e4 Bb4 13.Kf1–/+) 12.ab5 (12.de6 Na4 13.ef7 Kh8 14.Ba4 ba4 15.Ra4 Ra4 16.Qa4+/–) 12...Bb4 13.Nc3 Ra1 (better is 13...Nfd5 14.Kd2 Bd7–/+) 14.Ba1?? (better is 14.Qa1 Nfd5 15.0–0=) 14...Nbd5–+ 15.Qd2 Qa5 16.Ne5 Qa1 (17.Qd1 Qc3 18.Ke2 Bd6–+) 0–1. Gegonz – BFM (1625), internet, 2007.

8.dc5 Bc5 9.Be2 Bd7=.

8.cd5 ed5 9.dc5 Bc5 10.Nbd2 Bg4 (10...Ne4 11.Bd3=) 11.h3 (11.Rc1 Nbd7=) 11...Bh5 (11...Bd7 12.Rc1 b6 13.Qa4=) 12.Rc1 Nbd7 (12...Be7 13.Qa4+=) 13.ba6 ba6 14.Bd3 Qb6 15.Qc2 (better is 15.Qb3=) 15...Rfe8 (better is 15...Rac8!? 16.0–0 Bg6 17.Bg6 fg6+=) 16.Bf6+/– Be3 17.fe3 (17.0–0!? Bf3 18.Nf3 Nf6 19.fe3 Qe3 20.Kh2 Qf4 21.g3+/–) 17...Qe3+= 18.Kf1 Nf6 (18...Bg6 19.Ne1 Nf6 20.Bg6 fg6 21.Qd3=) 19.Re1 (19.g4 Bg6 20.Bg6 hg6+=) 19...Qf4+= 20.Kf2 (20.g4 Bg6 21.Bg6 fg6+/–) 20...Bf3 21.g3 Qd4 (21...Re1 22.gf4 Rh1 23.Qc6+= (worse is 23.Kf3 Rh3 24.Kg2 Re3+=)) 22.Kf3 Rec8 23.Nb3 Rc2 24.Nd4 Ra2 25.Ra1 Rd2 26.Ke3 Rg2 27.Ne2 (27.Ra6?! Rg3 28.Kf2 Ra6=) 27...a5 (better is 27...Ne4 28.Ba6 Rd8+/–) 28.Kf3+– Re2 29.Be2 Kf8 (29...a4 30.Ra3+–) 30.Ra3 Ne4 (30...Ke7 31.Rha1+–) 31.Rha1 (31.Rha1 Rb8 32.Rd1 Ng5 33.Kg2+–; 31.Rd1 Nf6+–) 1–0. Stadler,Pavel – Muttoni,Guillermo, WC–2010–P–00002, 2006.

8.cd5 Nd5 9.e4 Qa5 10.Nbd2=.

7.d4 b6

8.dc5 Bc5 9.Nbd2 (9.cd5 Nd5 10.e4 Nc7 11.Qd8 Rd8=) 9...Nbd7 (9...a6 10.Qc2=+) 10.a3 Bb7 (10...a6 11.cd5 Nd5 12.Nb3=) 11.Bd3 dc4 12.Nc4 h6 (12...Qe7 13.0–0=) 13.0–0 Qc7 14.Nfe5 Ne5 15.Ne5 (15.Be5 Qe7+=) 15...Rad8 (15...a6 16.ba6 Ba6 17.Ba6 Ra6 18.Qf3=) 16.Qc2 Rc8 (16...Rd5 17.Nf3=) 17.Qc3 (17.Qa4 Rfd8 18.Rfc1 Rd5=) 17...Qd6 (17...Nd5 18.Qb3=) 18.Bc4 (18.Ng4 e5 19.Nf6 gf6+–) 18...Qc7= 19.Ng4 Be7 20.Rac1 (20.Nf6? Bf6 21.Qb3 Qc4 22.Qc4 Rc4 23.Bf6 gf6–+) 20...Qb8 (20...Rfd8 21.Nf6 Bf6 22.Qb3=) 21.Ne5 (21.Qe5 Qe5 22.Ne5 Rfd8+=) 21...Bd5 (21...Ne4 22.Qc2 Nd6 23.Qe2 Nc4 24.Rc4 Rc4 25.Nc4+=) 22.Qb3+= Bc4 (22...Bd6 23.Bd5 Be5 24.Rc8 Bh2 25.Kh1 Qc8 26.Bf6+=) 23.Nc4 (23.Rc4 Rc4 24.Qc4 Qd6+–) 23...Rfd8 (23...Ng4 24.f4+=) 24.Ne5 Rc1 25.Rc1 Rc8? (better 25...Qd6+=) 26.Nc6+– Qb7?? (26...Rc6 27.bc6 Ne8+–) 27.Ne7 Qe7 28.Rc8 Kh7 (28...Ne8 29.Qc3 f6 30.Qc6+–) 29.Qd3 (better 29.Qc2 g6 30.Rc7 Nd7+–) 29...g6 30.Qc3 (30.Qd4!? e5 31.Qe5 Qe5 32.Be5 Ng8+–) 30...Qd7 (30...Kg7+–) 31.h3 (31.h3 e5 32.Rc7 Qd1 33.Kh2+–; 31.Rh8 Kh8 32.Qf6 Kh7 33.Qg7) 1–0. katchum (1765) – jjones (1895), net–chess.com, 2001.

8.Bd3 Bb7 9.0–0 Nbd7 10.Nbd2 Re8 11.Qc2 h6 12.Ne5 Ne5 13.de5 Nd7 14.a4 Nf8 15.Rfd1 f6 (15...a6!?+=) 16.a5+– f5 (16...Rc8 17.cd5 ed5 18.Bf5+–) 17.a6 Bc8 18.cd5 (18.Be2 Ng6+–) 18...ed5+– 19.Bf5 Bf5 20.Qf5 Qc8 21.Qc2 (21.Qf3 Qd7 22.Nc4 Rad8+–) 21...Qd7 22.Ne4! Qe6 (22...de4 23.Qc4 Double attack (23.Rd7 Pinning; 23.Rd7 Deflection; 23.Qc4 Decoy; 23.Rd7 Clearance)) 23.Nc3 Rad8 24.f4 Ng6?? (better 24...g6+–) 25.f5+– Qf5 (25...Qf7 26.fg6 Qe6+–) 26.Qf5 Nf8 27.Nd5 Bg5 28.Nf6! gf6 29.ef6 Be3 30.Kf1 Kf7 31.Rd8 Rd8 32.Re1 Bg5 33.Re7 Kg8 34.f7 1–0. DEFFM – GayanovK, freechess.org, 2018.

7.d4 cd4

8.Qd4 a6 9.Nbd2+=.

8.Qd4 dc4 9.Qd8 (9.Bc4 a6=) 9...Rd8 10.Bc4 Ne4 (10...Nbd7 11.Nbd2+=) 11.0–0 (11.Nc3 Bb4 12.Rc1 a6 13.ba6 b5 14.Bb5 Rd5=) 11...Nd7 (11...Bd7 12.Rc1=) 12.Rd1 Nb6 13.Rd8 Bd8 14.Bd3 Nc5 15.Be2 (15.Bf1 Nba4 16.Be5 f6+=) 15...Nba4 16.Bd4 (16.Be5 f6 17.Bd6 Bd7+=) 16...b6 (16...f6 17.Nbd2 e5 18.Bc5 Nc5 19.Bc4 Kf8 20.Rd1+=) 17.Nbd2 Bb7 (17...f6 18.Rb1=) 18.Rc1 (18.Ne5 Rc8+=) 18...Be7 (18...f6 19.e4=) 19.Ne5 Rc8 20.Bf3 (better is 20.Nc6 Bc6 21.bc6 Rc6 22.Bb5+=) 20...f6? (better is 20...Bf3 21.gf3 f6=) 21.Bb7+– Rc7 22.Bf3 fe5 23.Be5 Rd7 24.Ne4 (24.Rc2 Rd8+–) 24...Ne4+/– 25.Be4 Nc5 26.Bb1 (26.Bc2 Nd3 27.Bd3 Rd3+/–) 26...Bf6 (26...Kf7 27.Kf1+/– (27.Bh7?! g6 28.f4 Bf6=)) 27.Bg3 (27.Bf6!? gf6 28.Kf1+/–) 27...Kf7 28.Bc2 (28.f3!?+=) 28...Rd2= 29.Bh7?? (better is 29.Bd1=) 29...g6–+ 30.Bb8 Ra2 31.Bd6 Kg7 (31...Bb2 32.Rd1 Nd7 33.f3–/+) 32.Bc5–/+ bc5 33.Bg6 Kg6–+ 34.g3 Kf5?? 35.Rc5= Ke4 36.Kg2 Be7 37.Rc6 Kd5 38.e4 Ke5+= 39.Kf1 Bd8–/+ 40.Rc4 Bb6 41.f4 Kf6 42.Rc6 Ke7 43.h4 Rf2 44.Kg1 Rf4?? 45.Rb6!+– ab6?? 46.gf4 Kd6 47.e5 Ke7 48.Kf2 Kf7 49.h5 Kg7 50.f5! ef5 51.Kf3 Kh6 52.Kf4 Kh5 53.Kf5 Kh6 54.Kf6 (54.Kf6 Kh5 55.e6 Kg4 56.e7 Kf3 57.e8Q Kf2 58.Kf5 Kf3 59.Qe1 Kg2 60.Kg4 Kh2 61.Kf3 Kh3 62.Qg3#) 1–0. Bonetti,Shane – Shturmovik, ICC, 2002.

8.Bd4 dc4 9.Qa4 Nbd7 10.Qc4 e5 11.Ne5 Ne5 12.Be5 Be6 13.Qa4 Nd5 14.Nd2 Nb4 15.a3 Nd3 16.Bd3 Qd3 17.Qd4 Qb5 18.Rb1 (18.Bg7 Rfd8 19.Qb2 Qg5+=) 18...Qd5 (18...Qc6 19.0–0 Rfd8 20.Qb2–/+) 19.0–0 Qd4 20.Bd4 b6 21.a4 Rfc8 22.Ne4 Rc4 23.a5 ba5 24.Rb7 Bf8 25.Ng5 Rb4 26.Ra7 Ra7 27.Ba7 Ba2 28.Nf3 Rb1 29.Rb1 Bb1 30.Kf1 Bb4 31.Bd4 Bd3 32.Kg1 f6 33.g4 a4 34.h4 White plans g5 34...a3 35.g5 Be2 36.Kg2 Kf7 37.Ng1 Bd3 38.f4 Bd2 39.Bc5?? (better is 39.Kf3!?–/+) 39...Bc1 (better is 39...a2 40.Bd4 Be3–+) 40.Kf3 Bb2 41.Ba3 Ba3 42.e4 Bb4 43.Nh3 Be1 44.h5 h6 45.Ke3 Bc2 46.Ke2 Ba5 (46...Bh4!? 47.gf6 gf6 48.Ke3–+) 47.gh6 gh6 48.Nf2 Bb6 49.Ng4 White intends e5 49...Kg7 (better is 49...Be4!? 50.Nh6 Ke6 51.Ng8–+) 50.e5 f5 51.Nf6 Ba4 52.Nd5 Bc5 53.Nc7 0–1. Szary,Marcin (1860) – Wisniewski,Przemyslaw (2045), DMR KPZSzach Poland, 2008.

8.Bd4 Ne4 9.Bd3 Qa5 10.Nfd2 Nd7 11.Be4 (11.cd5 ed5 12.0–0 Ndc5+=) 11...de4= 12.Bc3 Bb4 (12...Qc7 13.Ne4 e5 14.Nbd2=) 13.Qb3 (13.Ne4 Nc5 14.Qd4 Bc3 15.Qc3 Qc7 16.Nc5 Qc5+=) 13...Bc3 (13...Nc5 14.Bb4 Nb3 15.Ba5 Na5+=) 14.Qc3+= (< 14.Nc3 Nc5 15.Qc2 Nd3 16.Ke2 f5=+) 14...Qc3 (14...Qc7 15.Ne4 f5 16.Ng3+=) 15.Nc3 f5 16.Nb3 (16.Ke2 Rd8+=) 16...Ne5= 17.c5 Bd7 18.Ke2 Rac8 19.f3 (19.Rad1 Nd3=) 19...Nd3=+ 20.Rhd1 Rfd8 21.fe4 Nc5 22.Nc5 Rc5 23.Rdc1 (23.Rac1 Kf7=) 23...fe4 (23...Bb5!? 24.Nb5 Rb5 25.ef5 ef5–/+) 24.a4=+ Rc4 25.Nd1 (25.Rc2 e5=+) 25...Rdc8 26.Kd2 a6 27.Nb2 (27.Rc4 Rc4 28.Nc3 Rb4=+) 27...Rc1–/+ 28.Rc1 Rc1 29.Kc1 ab5 30.a5 Kf7 31.Kd2 Kf6 32.Kc3 Ke5 33.Kb4 Kd6 34.Nd1 Bc6 35.Nc3 h5 36.Nb5 Ke5 37.Kc5 h4 38.Nc7 Bd5 39.Kb6+= Kf5?? 40.Ne8 Kg4 41.Nc7 h3 42.gh3+/– Kf3 43.Nd5+– ed5 44.Kb7 d4 45.ed4 e3 46.a6 e2 47.a7 e1Q 48.a8Q ½–½. Grau,Jose Maria – Corredor,Marcelino, Equipos Asturias, 1990.

7.d4 Nbd7

8.a4 Ne4 9.Nbd2 f5 (9...Qa5 10.Qc2=+) 10.Qb3 Ndf6 11.Ne5 (11.Be2 Ng4=) 11...Nd2=+ 12.Kd2 Ne4 13.Ke2 f4 (better 13...Bd6!? 14.Nf3 Qc7=+) 14.f3+= dc4 15.Nc4 Nf6 16.e4 (16.dc5 Bc5 17.ef4 Nd5+=) 16...cd4= 17.Rd1 Bc5 18.Qd3 Nh5 19.Kd2? (better 19.Bd4!? Bd4 20.Qd4=) 19...Qh4 20.Be2 (20.Bd4 Rd8 21.Bc5 Rd3 22.Kd3–/+) 20...b6 (20...Qg5 21.e5–+) 21.Kc2 (21.g4 Nf6 22.e5–/+) 21...a6–/+ 22.g3 Qe7 (22...fg3 23.hg3 Qg3 24.Rh5 ab5 25.ab5+–) 23.e5 g6 (23...ab5 24.ab5 Bd7 25.g4 Bb5 26.Ra1–+) 24.g4–/+ Ng7 25.h4 (25.Bd4 ab5 26.ab5 Bb7–/+) 25...ab5–+ 26.ab5 Bd7 27.Qb3 Qd8 (27...Rfd8 28.h5 g5 29.Nd6 Bd6 30.ed6 Qd6 31.Rd4–/+) 28.Na3? (better 28.Bd4 Rc8 29.Kb1=) 28...Ra5 29.h5 (29.Kd2 Qa8 30.Ra1 d3 31.Kd3 Ba3 32.Ra3 Rb5–+) 29...gh5 30.gh5 Ba3 (30...Rf5 31.Rd4 Bd4 32.Bd4–+) 31.Ba3 Bb5?? (better 31...Qc7 32.Kb1 Rfa8–+) 32.Bb5= Rb5?? (32...Qc7 33.Kb1 Qc3+–) 33.Qd3?? (better 33.Qb5 Qc7 34.Kb1+–) 33...Qc7 (better 33...Qd5 34.Rc1 Qa2 35.Kd1 Rb3 36.Qd4 Ra3–+) 34.Kd2 Ra8 35.Rc1? (35.Rhg1 Qc3! 36.Qc3 dc3 37.Kc2 Ra3 38.Rd8 Kf7 39.Rd7 Kf8 40.Rdg7 Re5 41.Rh7 Re2 42.Kd3 Re3 43.Kc4–+) 35...Qe5 36.Rhg1 (36.Rhe1 Qh5 37.Kd1–+) 36...Rb3 (better 36...Qe3!? 37.Qe3 fe3 38.Kd1–+) 37.Rg7?? (37.Qb3 Qe3 38.Qe3 de3 39.Ke1 Ra3 40.h6+–) 37...Kg7–+ 38.Rc7 (38.Qb3 Qe3 39.Qe3 de3 40.Ke2 Ra3 41.Rc6–+) 38...Kh6 (better 38...Qc7 39.Qb3 Qc3 40.Qc3 dc3 41.Kc3 Ra3 42.Kd4 Re3–+) 39.Qh7 Kg5 40.Be7 (40.Be7 Qf6 41.Qg6 Kh4 42.Qg4; 40.Qg6 Kh4 41.Qg4) 1–0. Mittelstaedt,Joel (1625) – Titgemeyer,Sven (1925), GER–chT U14, 2009.

8.Nc3 Nb6=.

8.Nc3 dc4 9.Bc4= cd4 10.Nd4 (10.ed4 Nb6 11.Bd3 a6=) 10...Nb6 (10...Qc7 11.Be2 Nc5 12.0–0=+) 11.Bd3 (11.Bb3 Qd6=) 11...Bd7 (11...e5 12.Nf3=) 12.e4 (12.0–0!?=) 12...e5 13.Nb3 (13.Nf3!? Be6 14.0–0=) 13...Bg4 14.f3 (14.Be2 Bb4 15.0–0 Qd1 16.Bd1 Bd1 17.Nd1 Nc4–/+) 14...Be6 15.0–0 Nc4 (15...Rc8 16.Kh1–/+) 16.Bc4 Qb6 17.Kh1 (17.Nd4 Bc4 (worse 17...ed4 18.Na4 Qc7 19.Be6 fe6 20.Rc1+=) 18.Na4 Qc7–/+) 17...Bc4–+ 18.Rg1 Rfd8 (18...Bb5?! 19.Nb5 Qb5 20.a4=+) 19.Qe1 Bb5 (19...Rd3!?–+) 20.Nb5=+ Qb5 21.Qc3 (21.Qa5 Qa5 22.Na5 Bb4=+) 21...Bd6 22.a4 (22.Rgd1 Rd7–/+) 22...Qd7 23.g4 (23.Qe3!?–/+) 23...Rac8–+ 24.Qd2 (24.Qd3 Qe8 25.Qb5 Qe6–+) 24...Qe6 (24...b5 25.a5–+) 25.Qe3 b6 (25...Rc2 26.Rg2 Rdc8 27.Qd3–+) 26.a5 (26.Rac1 Be7–+) 26...Bc7 (26...ba5 27.Rg2–+) 27.Rgc1 h6 28.Rc3 ba5 29.Na5 (29.Qe2 Bd6 30.Rc8 Rc8 (30...Qc8?! 31.Na5 Qc7 32.Nc4=+) 31.Na5 h5–+) 29...Bb6 (better 29...Ba5 30.Ra5 Ng4–+) 30.Qc1?? (better 30.Qe2–+) 30...Rc3 31.Qc3 Bd4 (better 31...Ng4 32.fg4 Qg4–+) 32.Qb4 (32.Qd3 Kh7 33.Bd4 Rd4–/+ (33...ed4? 34.e5 Kg8 35.ef6+–)) 32...Bb2 33.Qb2 Rd3 34.Qb8?? (better 34.Rf1–/+) 34...Kh7–+ 35.Rf1 (35.g5 hg5 36.Qa7 Rf3–+) 35...Qa6 36.Qe5 Rd5 37.Qa1 Ra5 38.Qb1 (38.Qd1 Ra2–+) 38...Re5 (better 38...Nd7 39.e5 Kg8 40.Rd1–+) 39.f4 (39.Kg2–+) 39...Rb5 (better 39...Ng4!? 40.Rg1 Nf2 41.Kg2–+) 40.Qd3 Ng4 (40...Qc6!? 41.Kg1 Ng4 42.Qg3 Qe4 43.h3 Qd4 44.Kh1–+) 41.e5 (41.h3 g6 42.e5 Qb7 43.Qf3 Ne3 44.Qb7 Rb7–+) 41...g6 42.h3 Qb7 43.Qf3 Ne3 44.Qb7 Rb7 45.Rf3 (45.Ra1–+) 45...Rb4 (better 45...Rb1 46.Kh2 Rb2 47.Kg1 Rg2 48.Kh1–+) 46.Kh2?? (46.Re3 a5 47.Kg2 Rf4 48.e6 fe6 49.Re6–+) 46...Rb2 47.Kh1 Re2 48.Kg1 (48.f5 gf5 49.Rf4 Ra2–+) 48...a5 49.f5 gf5 50.Rf4 Rg2 51.Kh1 Ra2 52.Rf3 Ra3 53.Kg1 (53.Rf2 Kg6 54.Rb2 Ra1 55.Kh2 a4–+) 53...a4 54.Rf4 (54.h4 Rb3 55.Rf4 Rb1 56.Kh2 Rb2 57.Kg3 a3–+) 54...Ra2 55.Rb4 a3 56.Ra4 Rg2 57.Kh1 a2 58.Ra6 Re2 (58...Re2 59.Kg1 f4 60.h4 f3 61.Ra2 Ra2 62.e6 Ng4 63.ef7 Ra1) 0–1. Adams,Jonathan (1625) – Jackson,L Ross (1755), NZL–ch Major op, 1999.

8.Nc3 cd4 9.Qd4 Bc5 10.Qd2+=.

8.cd5 ed5 9.dc5 Nc5 10.Be2 a6 11.0–0 ab5 12.Bb5 (12…Bg4 13.h3=). van Rooijen,Peter (1850) – Madrid,Antonio (2120), SEMI, 2000.

8.cd5 ed5 9.dc5 Nc5 10.Be2 Be6 11.0–0 Rc8 12.Nbd2 Re8 13.Bd4 Nfe4 14.Rc1 Qa5 (14...Bd6 15.Nb3=) 15.Nb3 (15.Rc2 Bd6=) 15...Nb3 (15...Qa3 16.Nc5 Bc5 17.Bc5 Nc5 18.Rc2=) 16.Qb3 Ba3 17.Rc8 Rc8 18.Bd3 (18.Ra1 Bb4=) 18...h6 19.Qb1 (19.Rd1 Nc5 20.Bc5 Bc5=) 19...Nc3 20.Bc3 Rc3 21.Nd4 Bd7 (21...Bc5 22.Nb3 Qb4 23.Nc5 Qc5 24.Rd1=) 22.Bf5 (22.Bh7 Kh8 23.Bf5 Be8+=) 22...Qc7 23.Bd7 (23.b6 ab6 24.Bd7 Qd7=) 23...Qd7= 24.h3 (24.b6 a6=) 24…Qc8 ½–½. Van Rooijen,Peter – de Bouver,Guido, Orang–Utan Invitational, 2002.

8.cd5 ed5 9.dc5 Nc5 10.Be2 Bg4 11.0–0=.

8.cd5 Nd5

9.Nbd2 a6 10.e4 Nf4 11.g3=.

9.Nbd2 cd4 10.Bd4 Bf6 (10...Bd6 11.Bc4=) 11.Rc1 (11.Bf6 Qf6 (worse 11...gf6 12.Bd3+–) 12.Rc1 Rd8=) 11...Bd4 (11...Qa5 12.Qc2=) 12.Nd4 N7f6 (12...Re8 13.Qf3=) 13.Qc2 (13.e4 Nf4 14.N4f3 e5=) 13...Qa5 (13...Re8 14.Bc4=) 14.e4 (14.Bc4 Bd7=) 14...Nf4 (14...Nb4 15.Qc3 Rd8 16.N4b3+–) 15.N4b3 (15.Qc7 Qc7 16.Rc7 e5+=) 15...Qb4 16.g3 (16.Qc3 Qc3 17.Rc3 e5+=) 16...Ng6 17.Qc3 Qc3 ½–½. Riepe,Bernhard (2080) – Schwenger,Kurt (1950), desc–online.de, 2003.

9.Bd3 cd4 10.Bd4 e5 11.Ne5 (11.Be5? Ne5 12.Ne5 Bf6–+) 11...Ne5 12.Be5 Bb4 13.Kf1 Qg5 14.Bd4 Bf5 15.h4 Qg6 16.Bf5 Qf5 17.h5 (17.a3 Rfd8 18.Qf3 Qf3 19.gf3 Be7+=) 17...Rfc8 18.Rh3?? (better 18.g4 Qe4 19.Kg1=) 18...Rc2–+ 19.Rf3 Qc8 20.Na3 Ba3 21.h6 (21.Kg1 Bd6–+) 21...g6 22.Kg1 Qc4 23.e4 Bb4 24.Qd3 Qd3 25.Rd3 Nf4 26.Rb3 Bf8 27.Kh2 Ne2 28.Rd1 (28.Be3 Re8 29.Rd1 Re4–+) 28...Rd8 (28...Bh6?! 29.Be3 Be3 30.Re3 Ra2 31.Rd7–+; worse 28...Nd4 29.Rd4 Rf2 30.Rd7 Bh6 31.Rb7 Bf4 32.Kh3 Ra2 33.Rd3–+) 29.Rbd3 Nc1 (29...Nf4 30.Rf3 Bh6 31.Ra3–+) 30.Re3 Ne2 (30...Bh6 31.Ree1–+) 31.Red3 Nf4 (worse 31...Rd4 32.Rd4 Nd4 33.Rd4 Ra2 34.Rd7–+; worse 31...Nd4 32.Rd4 Rd4 33.Rd4 Ra2 34.Kg3–+) 32.Rf3 Bh6 33.g3 (33.Ra3 Ne6 34.Be3 Rd1 35.Bh6 a6 36.ba6 ba6 37.Ra6 Rf2–+) 33...Ne6 34.Rfd3 Rc1 (worse 34...Rd4 35.Rd4 Nd4 36.Rd4 Rf2 37.Kh1 Ra2 38.Rd7–+) 35.Be3 (35.Rc1 Bc1 (35...Rd4?! 36.Rd4 Nd4 37.Rc8 Bf8 38.a4=+; 35...Nd4?! 36.f4 Bg7 37.Rc4=+) 36.Rc3 Bb2–+) 35...Rd1 36.Rd8 Nd8 (36...Nd8 37.Bh6 Ra1–+) 0–1. Pierre (2185) – Wuerfel (2490), Rated game, 3m + 0s, 2005.

9.Be2=.

9.e4 Qa5 10.Qd2 Qd2 11.Nbd2=.

9.e4 N5f6 10.Qc2 cd4 11.Bd4 b6 (12.e5 Nd5=; 11...Bb4 12.Nc3=). Van Rooijen,Peter (1750) – Teboul,Rene (1920), CL3–2001.21.02, 2001.

7.d4 Ne4

8.Nc3 A) 8...Nd7 A1) 9.Rc1 Nc3 (9...Nb6 10.dc5 Nc5 11.cd5 Nd5 12.Qd4 Qa5 13.Be2 Rd8 14.0–0 f6; 9...cd4 10.Nd4 Ndc5 11.cd5 Nc3 12.Bc3 Qd5 13.Nf3 Qa2 14.Qd4 f6; 9...Qa5 10.Bd3 cd4 11.ed4 Bb4 12.Qc2 Qa2 13.cd5 ed5 14.0–0 Bc3; 9...Ndf6 10.dc5 Nc5 11.cd5 Nd5 12.Qd4 Qa5 13.Be2 Rd8 14.0–0 f6; 9...Re8 10.Bd3 cd4 11.Nd4 Ndc5 12.Nb3 Nd3 13.Qd3 dc4 14.Qe4 cb3) 10.Bc3 Nb6 11.Qb3 cd4 12.Bd4 Bd7 13.Ne5 Rc8 14.Bd3 f6; A2) 9.Qc2 cd4 (9...Ndf6 10.dc5 Nc5 11.Be2 Qd6 12.0–0 Bd7 13.Rfd1 Rfc8 14.Ne5 Be8; 9...Nc3 10.Bc3 cd4 11.ed4 Qc7 12.c5 a6 13.b6 Qf4 14.Bd3 e5) 10.Nd4 Bb4 11.cd5 Ndc5 12.a3 Ba5 13.0–0–0 ed5 14.Ne4 Ne4; A3) 9.cd5 Ndf6 (9...ed5 10.Nd5 Ndf6 11.Ne7 Qe7 12.Ba3 Qc7 13.Qa4 Ng4 14.Be2 Nef2) 10.de6 Be6 11.Qc2 Nc3 12.Bc3 Rc8 13.Rd1 Nd5 14.Bc4 cd4; B) 8...cd4 B1) 9.Nd4 Bb4 10.Rc1 dc4 11.Qc2 Nd6 12.Qa4 a5 13.a3 Bc3 14.Bc3 Nd7; B2) 9.ed4 a6 (9...Nd7 10.Rc1 Ndf6 11.Bd3 a6 12.ba6 Ra6 13.0–0 Nc3 14.Bc3 Ra2; 9...Qa5 10.Rc1 Bb4 11.Qc2 Bd7 12.Bd3 Nc3 13.Bc3 dc4 14.Bh7 Kh8 15.Be4) 10.Qb3 ab5 11.cb5 Qd6 12.Bd3 Qf4 13.0–0 Nd7 14.Rfe1 f5; B3) 9.Ne4 de4 10.Qd4 Bb4 11.Nd2 e5 12.Qd8 Rd8 13.Rd1 Nd7 14.a3 Ba5; C) 8...Qa5 C1) 9.Rc1 cd4 (9...a6 10.cd5 ed5 11.dc5 ab5 12.Qd5 Nf6 13.Qb3 b4 14.Nb5 Na6; 9...Nd7 10.Bd3 cd4 11.ed4 Bb4 12.Qc2 Qa2 13.0–0 Bc3 14.Bc3 Qc2) 10.Nd4 Bb4 11.Qc2 e5 12.Nf3 d4 13.ed4 ed4 14.Nd4 Re8; C2) 9.Qc2 cd4 (9...Nd7 10.Be2 cd4 11.Nd4 Bb4 12.Rc1 e5 13.Nf3 Qa2 14.Nd2 Bc3) 10.Nd4 Bb4 11.Rc1 e5 12.Nf3 d4 13.ed4 ed4 14.Nd4 Re8.

8.Nbd2 Qa5= A) 9.Be2 cd4 (9...dc4 10.Bc4 Nd6 11.0–0 Nc4 12.Nc4 Qb5 13.Rc1 Nd7 14.Qe2 Qa6; 9...a6 10.0–0 ab5 11.cd5 Nd2 12.Nd2 Qb4 13.Qc2 ed5 14.dc5 Nc6) 10.Bd4 e5 11.Be5 Nd7 12.Bd4 Bb4 13.cd5 Nb6 14.Bb6 ab6; B) 9.Bd3 a6 (9...cd4 10.Bd4 Nd2 11.Nd2 dc4 12.Bc4 Nd7 13.0–0 e5 14.Bb2 Ba3; 9...Nd7 10.0–0 f5 11.Nb3 Qc7 12.cd5 c4 13.de6 Nb6 14.Qc2 Be6; 9...f5 10.0–0 Nd7 11.Nb3 Qc7 12.Rc1 dc4 13.Bc4 Nb6 14.dc5 Nc4) 10.a4 cd4 11.0–0 de3 12.fe3 f5 13.cd5 ed5 14.Rc1 Qb4.

8.Nbd2 a6 A) 9.cd5 ed5 10.dc5 Nc5 11.Qc2 ab5 12.Bb5 Nc6 13.0–0 f6 14.Bd4 Nd4; B) 9.Be2 ab5 (9...Nd2 10.Qd2 ab5 11.cb5 c4 12.0–0 Nd7 13.a4 b6 14.Ba3 Ba3; 9...cd4 10.Ne4 de4 11.Qd4 Qd4 12.Nd4 e5 13.Nb3 Be6 14.Be5 Rc8; 9...Qc7 10.0–0 ab5 11.cb5 f5 12.Qc2 c4 13.h4 Qa5 14.Rfc1 Qb5) 10.cb5 Nd7 11.0–0 f5 12.dc5 Nec5 13.Qc2 Bd6 14.Bc3 Na4; C) 9.Qa4 Nd2 (9...Nd7 10.cd5 Nd2 11.Kd2 ed5 12.ba6 Nb6 13.Qc2 c4 14.ab7 Bb7; 9...cd4 10.Bd4 Nd7 11.cd5 Ndc5 12.Qc2 ed5 13.ba6 ba6 14.Ne5 Bf5) 10.Nd2 Nd7 11.ba6 Ra6 12.Qc2 Rb6 13.Bd3 g6 14.0–0 Qc7; D) 9.Ne4 de4 10.Nd2 Qa5 11.Qb3 cd4 12.Bd4 f5 13.Be2 Nd7 14.Bc3 Qc7; E) 9.dc5 ab5 (9...Nd7 10.cd5 Ndc5 11.ba6 Qa5 12.Nd4 Na6 13.N4b3 Qd5 14.Bc4 Qc6; 9...Nc5 10.cd5 ab5 11.Qc2 Nba6 12.a3 Qb6 13.Be2 ed5 14.0–0 g6; 9...Qa5 10.cd5 ed5 11.Be2 ab5 12.0–0 Nc6 13.Nb3 Qb4 14.Qd3 Nc5; 9...Bc5 10.cd5 ed5 11.Bd3 Qe7 12.0–0 ab5 13.Qc2 Bf5 14.Rfc1 Nd7) 10.cd5 ed5 11.Bb5 Nc5 12.0–0 Nc6 13.Qc2 Bd6 14.a4 g6.

8.Nbd2 cd4 9.Bd4 Qa5 10.Qc2=.

8.Nbd2 cd4 9.Bd4 Qa5 10.Bd3 Nd2 11.Nd2 dc4 12.Bc4 Bb4 13.Qc2 Rd8 14.Rd1 a6.

8.Nbd2 cd4 9.Bd4 a6 10.cd5 ed5 11.Bd3 Bf5 12.Qb1 Nd2 13.Kd2 Bd3 14.Kd3 Qd6.

8.Nbd2 cd4 9.Bd4 Qd6 10.Be2 Nd7 11.0–0 e5 12.Bb2 Nd2 13.Nd2 Nf6 14.Rc1 Be6.

8.Nbd2 cd4 9.Bd4 Nd7 10.Be2 e5 11.Bb2 Nd2 12.Nd2 dc4 13.0–0 Qb6 14.Qc2 Qb5.

8.Nbd2 cd4 9.Bd4 f5 10.cd5 ed5 11.Be2 a6 12.a4 Be6 13.0–0 ab5 14.ab5 Nd7.

8.Nbd2 cd4 9.Bd4 g6 10.Bd3 Nc5 11.Bc5 Bc5 12.0–0 Nd7 13.cd5 ed5 14.Nb3 Ba3.

8.Nbd2 cd4 9.Ne4 Bb4?? 10.Ned2+– de3 11.fe3 dc4 (11...Nd7 12.cd5 ed5 13.Bd4+–) 12.Bc4 Qa5 (12...a6 13.0–0+–) 13.0–0 Rd8 (13...Bc5 14.Qe2+–) 14.Rf2 (14.Ng5 Bd2 (14...Rd2 15.Qh5 Rd7 16.Bg7 Kg7 17.Qh7 Kf8 18.Rf7 Ke8 19.Qg8 Bf8 20.Qf8) 15.Qh5 Be3 16.Kh1 Rd7 17.Qh7 Kf8 18.Qg7 Ke7 19.Rf7 Kd8 20.Ne6 Ke8 21.Qf8) 14...Bc3 (14...Be7 15.Qc2+–) 15.Qc2 (15.Qc2 Bf6 16.Bd3+–) 1–0. GuestVDCJ – TSTGuest, freechess.org, 2016.

8.Nbd2 cd4 9.Ne4 de4 10.Qd4 Qd4 11.Nd4 Bb4 12.Ke2 e5=.

8.Nbd2 Nd7 A) 9.cd5 ed5 (9...Nd2 10.Qd2 ed5 11.Be2 c4 12.0–0 Nf6 13.Ne5 Qb6 14.f3 Qb5) 10.Be2 Qa5 11.0–0 Nc3 12.Bc3 Qc3 13.Rc1 Qb4 14.e4 Nf6; B) 9.Be2 cd4 (9...Qa5 10.0–0 Nc3 11.Bc3 Qc3 12.Nb3 Nb6 13.Rc1 Qb4 14.Nc5 Nc4; 9...Nd2 10.Qd2 dc4 11.Bc4 Nb6 12.Be2 cd4 13.Qd4 f6 14.0–0 Qd4; 9...a6 10.ba6 ba6 11.0–0 Rb8 12.Rb1 Bb7 13.cd5 Bd5 14.Ne4 Be4; 9...Ndf6 10.0–0 Bd6 11.Ne4 Ne4 12.Rc1 Qa5 13.dc5 Bc5 14.cd5 Ba3; 9...Nb6 10.0–0 Nc4 11.Nc4 dc4 12.Bc4 Qc7 13.Qc2 cd4 14.Rac1 Nd6) 10.Bd4 Ndc5 11.0–0 Bd6 12.Rc1 Qe7 13.Qc2 Rd8 14.Ne4 de4; C) 9.Qc2 cd4 (9...a6 10.ba6 Ndf6 11.Bd3 cd4 12.Bd4 Nc5 13.cd5 Nd3 14.Qd3 Nd5) 10.Ne4 de4 11.Nd4 Nf6 12.Be2 e5 13.Nb3 Qc7 14.0–0 Be6; D) 9.Bd3 Nd2 (9...cd4 10.Bd4 e5 11.Ne5 Ne5 12.Be5 Bb4 13.Be4 de4 14.a3 Ba5; 9...f5 10.0–0 cd4 11.ed4 dc4 12.Nc4 a6 13.ba6 Ra6 14.Qe2 b5; 9...Ndf6 10.Qc2 Nd2 11.Nd2 cd4 12.Bd4 Bd7 13.0–0 Rc8 14.a4 Qc7; 9...Qa5 10.0–0 f5 11.Nb3 Qb6 12.Rc1 a6 13.dc5 Ndc5 14.Bd4 dc4) 10.Nd2 cd4 11.ed4 dc4 12.Nc4 Bb4 13.Kf1 Nb6 14.Rc1 Bd7.

8.Bd3 Qa5 9.Nfd2 (9.Nbd2 a6= (9...f5 10.0–0 Nd7 11.Qc2 a6 12.ba6 ba6 13.cd5 ed5 14.Nb3 Qa4; 9...Nd7 10.0–0 f5 11.Nb3 Qb6 12.Rc1 dc4 13.Bc4 Rd8 14.Qc2 a5; 9...cd4 10.Bd4 Nd2 11.Nd2 dc4 12.Bc4 Nd7 13.0–0 Rd8 14.Rc1 Nf6; 9...Bf6 10.Qc2 cd4 11.Bd4 Bd4 12.ed4 f5 13.0–0 Nd7 14.Rfc1 Ndf6) 10.0–0 Nd2 11.Nd2 ab5 12.cd5 c4 13.a4 cd3 14.ab5 Qb5) 9...cd4 (9...Nd7 10.0–0 f5 (10...Ndf6 11.dc5 Nc5 12.Nb3 Qc7 13.Nc5 dc4 14.Bc4 Rd8) 11.Nb3+= (11.f3 Nd2 12.Nd2 dc4 13.Nc4 Qb5 14.a4 Qc6) 11...Qc7 12.N1d2 cd4 13.ed4 Ndf6 14.f3 Nd2) 10.ed4 (10.Bd4 Nd7+= (10...e5 11.Be5 Nd7 12.Bd4 Ndc5 13.Be4 Ne4 14.0–0 Nd2) 11.0–0 Nd2 12.Nd2 e5 13.Bb2 e4 14.Be2 dc4) 10...Nd7 (10...a6 11.a4= (11.0–0 ab5 12.cd5 ed5 13.Ne4 de4 14.Be4 Nc6) 11...Nd7 12.0–0 Ndf6 13.f3 Nd2 14.Nd2 Bd7) 11.0–0 f5 (11...Nd2 12.Qd2 (12.Bc3 Qc7 13.Nd2 a6 14.a4 ab5) 12...Qd2 13.Nd2= Bb4 14.Rfd1 Nb6; 11...Ndf6 12.Qe2 a6 13.cd5 Nd2 14.Nd2 Nd5) 12.Nb3 (12.f3 Ng5+= (12...Nd2 13.Qd2 Qd2 14.Nd2 Bb4) 13.Nc3 Qb6 14.Rf2 Qd6) 12...Qd8 (12...Qc7 13.c5= (13.N1d2 Bg5 14.Rc1 Qb8) 13...Rf6 14.f3 Rh6) 13.c5+= (13.cd5 ed5 14.f3 Nd6) 13...Ndf6 (13...Qe8 14.Nc3+= (14.f3 Ng5) 14...Qg6; 13...e5 14.c6 bc6) 14.f3+/– Ng5 15.Bc1 (15.Re1 Qe8+=) 15...h6 (15...Nf7 16.Re1+=) 16.Re1 (16.Bg5 hg5 17.Qe2 Nh5+/–) 16...Qe8 (16...Nf7 17.Qe2+/–) 17.Bf1 (17.Bg5 hg5 18.Nc3 Qg6+/–) 17...Qg6+= 18.Kh1 Bd7 19.Bf4 (19.Nc3 Rac8+=) 19...Rae8 (19...Nh5 20.Be3+=) 20.Nc1 (20.Na5 b6 21.Nb3 bc5 22.dc5 Nh5+=) 20...Nh5 (20...Nf7 21.Nc3+=) 21.Be5 Nf7 22.Nd3 Bb5 23.Nf4 Nf4 24.Bf4 Bf1 25.Rf1 Bf6 26.Bg3 Nd8 27.f4 Nc6 28.Bf2 Qg4 29.Qg4 fg4–+ 30.Rd1 g5 31.fg5 Bg5 32.Kg1 e5 33.de5 Re5 34.Nc3 Ref5 35.Rf1 Rf2! 36.Rf2 Be3 (36...Be3 37.Nd1 Bc5–+ (37...Bf2?! 38.Nf2 h5 39.Rf1–+)) 0–1. Torres Herrero,Fernando – Aragon Clerigo,Alberto, Valladolid, 1987.

8.Bd3 a6 A) 9.Nc3 ab5 (9...Nc3 10.Bc3 ab5 11.cb5 c4 12.Bc2 Nd7 13.0–0 b6 14.Qd2 Bb7) 10.cb5 f5 11.dc5 Nc5 12.0–0 Nbd7 13.Rc1 Bf6 14.Be2 b6; B) 9.dc5 Qa5 (9...Nc5 10.Nc3 ab5 11.cb5 Nd3 12.Qd3 Qd6 13.a4 Nd7 14.Ba3 Nc5; 9...Nd7 10.Nc3 Ndc5 11.cd5 ed5 12.0–0 Bf5 13.Bc2 Bf6 14.Ne4 Be4) 10.Kf1 ab5 11.cd5 ed5 12.Nbd2 Nc5 13.Nb3 Qb4 14.Bc2 Nc6; C) 9.0–0 ab5 10.cb5 f5 11.dc5 Nc5 12.Bd4 Nbd7 13.Be2 Qc7 14.Nc3 b6.

8.Bd3 Nd6 A) 9.Nbd2 cd4 (9...Nd7 10.Qc2 dc4 11.Nc4 Nc4 12.Qc4 Nb6 13.Qb3 c4 14.Bc4 Nc4; 9...dc4 10.Nc4 Nc4 11.Bc4 Nd7 12.0–0 Nb6 13.Be2 Bd7 14.Ne5 c4; 9...Nc4 10.Nc4 dc4 11.Bc4 a6 12.0–0 ab5 13.Bb5 Bd7 14.Bd3 Nc6) 10.Bd4 dc4 11.Nc4 Nb5 12.Bh7 Kh7 13.Qb1 Kh6 14.Qb5 Qd5; B) 9.Qc2 Nc4 10.Bc4 dc4 11.Qc4= a6 12.Nc3 cd4 13.ed4 ab5 14.Nb5 Bd7.

7.cd5 ed5

8.Be2 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Qa5 12.Nc3= c4 (12...Bf5 13.0–0=) 13.0–0 Bd7 Attacks the isolani on b5 (13...Bg4 14.Qc2=) 14.Qb1 (14.d3 Rc8 15.dc4 dc4=) 14...Rc8 (14...Re8 15.d3 Bf5 16.Rd1=) 15.Nd4 Bb4 (15...Bc5 16.d3=) 16.f4 (16.Bf3 Be6=) 16...Be8 (16...Bc5 17.Bf3=) 17.Rf3 (17.Bf3 Bc5=) 17...Nbd7 18.Nf5 Nc5?? (better 18...Ra8 19.Bb2 Nb6=) 19.Rg3 (19.Ne7 Kf8 20.Nc8 Nce4 21.Nd5 Nd5 22.Bg7 Kg7 23.Qe4 Nf6+–) 19...g6?? (better 19...Ra8 20.Rg7 Kf8+–) 20.Ne7+– Kf8 1–0. GuestZSWT – GuestTNHF, freechess.org, 2016.

8.Be2 Nbd7 9.0–0 a6 10.Nc3 ab5 11.Nb5 b6 12.a4 Ba6 13.Nc3 (13.Qc2 Re8=) 13...Be2 14.Qe2 Re8 15.Nb5 Ne4 16.d3 Nef6 17.Rfc1 h6 18.Ne5 Ne5 19.Be5 Nd7 20.Bc7 Qc8 21.a5 (21.Bg3 Bf6+=) 21...Qb7 (21...Ra5 22.Ra5 ba5=+) 22.Bd6 (better 22.ab6!? Nb6 23.Qg4=) 22...Qc6–/+ Black intends c4 23.Be7 Re7 (23...Qb5 24.Bd6–/+) 24.d4 (24.Nd4 Qf6 25.Nb3 ba5 26.Ra5 Ra5 27.Na5 Qb6=) 24...c4=+ 25.Nc3 ba5 26.Qf3 Qf6?? (better 26...Nb6=+) 27.Qd5 (27.Nd5 Qf3 28.Ne7 Kf8 29.gf3 Ke7 30.Rc4 Nb6+–) 27...Rb8 (27...Nb6 28.Qb5+–) 28.Ne4 (better 28.Qc4!? Rb2 29.Nd1+–) 28...Qe6+– 29.Qe6 Re6 30.Nc5 (30.Nd2 Rc6 31.Rc4 Rc4 32.Nc4 a4+–) 30...Nc5+= 31.dc5 Rc6 (31...Rb5 32.Rc4 Rc6 33.Rac1+=) 32.Rc4 (32.Ra5 Rb3+–) 32...Rb4 (32...Rb5 33.Rac1+=) 33.Rb4+– ab4 34.Ra8 Kh7 35.Ra5 b3 36.Rb5 b2 37.Rb2 Rc5 38.g4 Kg6 39.Kg2 ½–½. gtate (1860) – johnstar (1855), net–chess.com, 2003.

7.cd5 Nd5

8.Bc4 b6 9.Nc3 Nf6 (9...a6 10.0–0=) 10.0–0 Bb7 11.a4 Nbd7 12.Bd3 (12.d4 cd4 13.Nd4 Ne5=) 12...Bf3+= 13.gf3 (13.Qf3 Ne5 14.Bh7 Kh7 15.Qg3–+) 13...Ne5+= 14.Be2 (14.Be4 Ne4 15.fe4 Nd3–/+) 14...Qc7 (14...c4!?–/+) 15.f4= Ng6 16.f3 (16.Bf3!? Rad8 17.d3+=) 16...Rad8+= 17.Qe1 (17.d3 Nd5 18.Nd5 ed5=) 17...Nh5 (17...c4 18.Rc1 Kh8 19.Nb1+=) 18.Ne4 h6 (18...f5 19.Ng3 Bf6 20.Bc3 Ng3 21.Qg3+=) 19.Kh1 (19.d3 Qd7=) 19...f5 (19...Bh4 20.Qc1+=) 20.Ng3 (20.Rg1 Kh7 21.Ng3 Bf6=) 20...Bh4 (20...Ng3 21.Qg3 Rd2 22.Qg6 Rb2 23.Rg1+=) 21.Rg1 (21.d4 cd4 22.Rc1 Qd6=) 21...Qd7 The backward pawn on d2 becomes a target (21...Qd6 22.d3+=) 22.Bc3 (22.d4 cd4 23.Bd4 Ngf4+=) 22...Qd5 (22...Ng3 23.hg3 Bf6 24.a5=) 23.Qc1 (23.a5!?=) 23...Ng3 Black gets the initiative 24.hg3 Bf6 (24...Be7 25.a5+=) 25.Rd1 (25.a5 Bc3 26.dc3 c4=) 25...Kh7 (25...e5 26.fe5 Be5 27.Be5 Ne5 28.d4 cd4 29.Rd4=) 26.Kg2 e5 27.Rh1 (27.fe5 Ne5 28.d4 Nc4=) 27...ef4+= 28.Bf6 (28.gf4!? Nh4 29.Kf2=) 28...Rf6–/+ (28...gf6?! 29.ef4 Rfe8 30.Kf1+=) 29.Rd1 (29.ef4 Qd2 30.Qc4 Rd4–/+) 29...fg3–+ 30.Bc4 Qb7 31.d4? (better is 31.Rh1–+) 31...Nh4 32.Kg1 Nf3 33.Kf1 cd4 (33...g2 34.Kg2 Nh4 35.Kh3 Qg2 36.Kh4 Qh2) 34.ed4 (34.a5 Nh2 35.Kg1 ba5–+) 34...Nd4 (34...g2 35.Kg2 Ne1 36.Kf1 Qg2 37.Ke1 Re8 38.Qe3 Re3 39.Be2 Re2) 35.Kg1 (35.Qe3 Qh1 36.Qg1 Qf3 37.Ke1 Nc2) 35...Rfd6 (35...Nf3 36.Kf1 g2 37.Kf2 Rd1 38.Qd1 g1Q 39.Qg1 Ng1 40.Rg1–+) 36.Rd4 Rd4 37.Qc2 (37.Be2–+) 37...Qf3 38.Rf1 (38.Bd3–+) 38...Qe3 39.Kh1 (39.Rf2 Qf2 40.Qf2 gf2 41.Kf2 Rc4 42.Ke3 Rc3 43.Ke2 Rc2 44.Ke1 f4 45.a5 f3 46.a6 Re2 47.Kf1 Rd1) 39...Rh4 0–1. Wittner,Eduard – Donkoff,Georg, Baden–ch AT4, 1994.

8.Bc4 Bf6 9.Bf6 Qf6 10.d4=.

8.Be2 a6 A) 9.Nc3 ab5 10.Bb5 (10.Nb5 Nc6 11.0–0 Bd7 12.a4 Qb6 13.g3 f6 14.Qc2 Ncb4 15.Qb3) 10...Nc6 11.0–0 Bd7 12.a4 Ndb4 13.d4 f5 14.Rc1 cd4 15.ed4; B) 9.a4 ab5 10.ab5 Ra1 11.Ba1 Nd7 12.Nc3 Nb4 13.0–0 b6 14.Bb2 Bb7 15.Qb3; C) 9.Qa4 Nc7 10.Qg4 (10.ba6 Nba6 11.0–0 Bd7 12.Qg4 e5 13.Qg3 f6 14.Nc3 Be6 15.a3) 10...e5 11.Qg3 f6 12.b6 Ne6 13.Nc3 Nc6 14.0–0 Qb6 15.Rab1.

8.Be2 b6 9.Nc3 Nc3 10.dc3 Bb7 11.0–0 Nd7 (11...Qc7 12.c4=) 12.Qc2 Qc7 13.c4 Nf6 (13...Bd6 14.Rfd1=) 14.Ne5 (14.Ng5 e5+=) 14...Bd6 15.Nc6 (better is 15.Bf3=) 15...Bc6 16.bc6 Bh2 (16...Qc6 17.Bf3 Qc7 18.Bf6 gf6 19.Ba8 Ra8 20.Qe4+/–) 17.Kh1 Rad8?? (better is 17...Be5–+) 18.Bf6+/– gf6 19.g3 (19.f4 Bf4 20.Rf4 Qe5+/–) 19...Bg3+= 20.fg3 Qc6 21.Kh2 Kh8 (21...f5 22.Bf3 Qc7 23.Qf2+=) 22.Rf4 (better is 22.Rf6!? Qc7 23.Qc3+–) 22...Qd6 23.Rh4 (23.Rd1 Qe5+=) 23...f5 24.Kg2 (24.Rd1 Qe5 25.Rd3 Rg8+=) 24...Qd2 (24...Rg8 25.Rh3=) 25.Qd2+= Rd2 26.Kf2 Rfd8 (26...Kg7 27.a4=) 27.Rah1+= Ra2?? (better is 27...Kg7+=) 28.Rh7+– Kg8 29.Rh8 Kg7 30.Rd8 (30...Rb2 31.Rhd1+–) 1–0. var – mels01, Live Game Caissa's Web, 2004.

8.Be2 b6 9.d4 a6=.

8.Be2 Nd7 9.0–0 Bf6 (9...Qc7 10.Nc3 (10.Qb3 N7f6 11.Na3 Ne4 12.Nc4 f6 13.Bd3 Nd6 14.Nd6 Qd6 15.a4; 10.h3 N7f6 11.Nc3 Bd7 12.Qb3 Rac8 13.Nd5 ed5 14.Be5 Qb6 15.a4; 10.g3 N7f6 11.Nc3 Bd7 12.Qb3 Rfc8 13.Qc4 h6 14.a4 a6 15.Ne4; 10.a3 b6 11.Nc3 Bb7 12.Qc2 Bf6 13.Bd3 Nc3 14.Bc3 Bf3 15.gf3) 10...N7f6 11.Qb3 Bd7 12.Rac1 Nb6 13.Qc2 c4 14.d3 a6 15.dc4; 9...N7f6 10.Nc3 (10.Ne5 Qc7 11.f4 Rd8 12.Qa4 Bd7 13.e4 Nb6 14.Qc2 a6 15.Nc3) 10...Qc7 11.h3 Bd7 12.Qb3 Rac8 13.Nd5 ed5 14.Be5 Qb6 15.a4; 9...Bd6 10.Qb3 (10.Qc2 Nb4 11.Qb3 Nf6 12.Nc3 b6 13.a3 Nbd5 14.Qc2 g6 15.e4; 10.Nc3 N7f6 11.Qb3 Re8 12.g3 Nc3 13.dc3 b6 14.Rad1 Bb7 15.c4; 10.Na3 N7b6 11.Nc4 Nc4 12.Bc4 Bd7 13.Qb3 Qc7 14.Rac1 Rac8 15.d4; 10.g3 f5 11.Na3 N7b6 12.Nc4 Nc4 13.Bc4 Nb6 14.Be2 Bd7 15.Ne5) 10...Qc7 11.Nc3 N7f6 12.Nd5 Nd5 13.g3 Be7 14.Rac1 Bd7 15.Ne5; 9...N7b6 10.Nc3 (10.a4 Qc7 11.a5 Nd7 12.Nc3 N7f6 13.Qb3 Bd7 14.h3 Nb4 15.Ng5; 10.h3 Bd7 11.Nc3 Nc3 12.Bc3 Nd5 13.Ne5 Be8 14.Qb3 f6 15.Nc4) 10...Nc3 11.Bc3 Nd5 12.Qb3 Nc3 13.dc3 Bf6 14.Rfd1 Qc7 15.Nd2) 10.d4 (10.Nc3 b6 11.Qa4 Bb7 12.Rfd1 a6 13.ba6 Ba6 14.Ba6 Nb4 15.d4) 10...cd4 11.ed4 b6 (11...Qb6 12.Nc3 Nf4 13.Ne4 Be7 14.g3 f5 15.Neg5) 12.Nc3 (12.Qd2 Bb7 13.Nc3 Qb8 14.Bd3 Nb4 15.Be4) 12...Nf4 (12...Bb7 13.Nd5 Bd5 14.Qa4 Qc7 15.Rac1) 13.Ne4 (13.Re1 Ne2 (13...Bb7 14.Bf1 Rc8 15.g3) 14.Qe2 Bb7= (14...a6 15.Qe4) 15.Ba3; 13.Ba3 Be7 14.Be7 Qe7 15.g3) 13...Bb7=/+ 14.Nf6 (14.Nfd2 Ne2 (14...Rc8 15.Bf3) 15.Qe2 Be7+=; 14.Qd2 Nh3 15.gh3) 14...Qf6–/+ 15.Ne1 (15.Bd3+=) 15...Qg5 16.Bf3 (16.Bc1!?+=) 16...Bf3'–/+ 17.Qf3 Qb5 18.Ba3? (better is 18.Qf4 Qb2 19.Nd3–/+) 18...Ne2–+ 19.Kh1 Ng3?? (better is 19...Nd4 with excellent chances for Black 20.Qd3 Rfc8 21.Qb5 Nb5–+) 20.Kg1 Qf1# 0–1. Suutarla,Ari – Nemes,Gyorgy, IBCA–ol blind, 1976.

8.Be2 Nd7 9.Nc3 A) 9...Qc7 10.Qb3 (10.0–0 N7f6 11.Qb3 Bd7 12.h3 h6 13.Rfc1 Rac8 14.Nd5 ed5 15.Be5; 10.h3 N7f6 11.0–0 Bd7 12.Qb3 h6 13.Rac1 Nb6 14.Qc2 c4 15.a4; 10.Nd5 ed5 11.Qc2 Nf6 12.0–0 g6 13.Rac1 Bf5 14.Bd3 Bd3 15.Qd3; 10.Qa4 N7f6 11.0–0 Bd7 12.Qb3 Rac8 13.Nd5 ed5 14.Be5 Qb6 15.Rab1) 10...N7f6 11.Rc1 Nc3 12.Bc3 Ne4 13.0–0 Bd7 14.Be5 Qb6 15.Qc2; B) 9...Nc3 10.Bc3 (10.dc3 Qc7 11.0–0 b6 12.Qc2 Bb7 13.Rad1 Rfd8 14.c4 Bf6 15.Bc3) 10...Nf6 11.Qc2 Nd5 12.0–0 Nc3 13.dc3 Qc7 14.Rfd1 g6 15.h3; C) 9...N7b6 10.0–0 (10.Nd5 Nd5 11.0–0 f6 12.Qb3 Bd7 13.Bc4 Qb6 14.d4 Rf7 15.Rad1; 10.Qb3 Nc3 11.dc3 a6 12.ba6 c4 13.Bc4 Nc4 14.Qc4 Qb6 15.0–0; 10.h3 Nc3 11.dc3 Qd1 12.Kd1 a6 13.a4 ab5 14.ab5 Ra1 15.Ba1; 10.Qc1 Nc3 11.Qc3 Bf6 12.Qc2 Bb2 13.Qb2 Qd5 14.a4 Bd7 15.0–0) 10...Nc3 11.Bc3 Nd5 12.Bb2 Bd7 13.Qb3 Qa5 14.a4 Be8 15.Qc2; D) 9...N7f6 10.0–0 (10.Qb3 Qd6 11.0–0 Bd7 12.Ng5 Qb6 13.Nge4 Nc3 14.Nf6 Bf6 15.Bc3) 10...Qc7 11.Qb3 Bd7 12.h3 Rac8 13.Nd5 ed5 14.Be5 Qb6 15.a4.

7.Be2 a5

8.0–0 b6 9.a4 (9.d4 a4=) 9...Nbd7 10.d4 (10.Nc3 Bb7=) 10...Bb7 11.Nc3 (11.Nbd2 Rc8=) 11...Rc8 12.cd5 Nd5 13.Nd5 (13.Rc1 Nc3 14.Rc3 Bd6=) 13...Bd5 14.Rc1 Rc7 (14...Bf6 15.Ba3=) 15.Bc4 Qa8 (15...Bc4 16.Rc4 cd4 A) 17.Qd4? Bf6 18.Rc7 Bd4 (18...Qc7?! 19.Qd2=) 19.Rd7 Qd7 (19...Bb2?! 20.Rd8 Rd8 21.Rb1=) 20.Bd4 Qc7–+; B) 17.Rc7 Qc7 18.Nd4=) 16.Bd5+= Qd5 17.dc5 ½–½. Franke,Roland – Duemmke,Juergen, Bahn–chM Stade, 1992.

8.0–0 Nbd7 9.d4=.

8.a4 b6 9.0–0 Bb7 10.Na3 Nbd7 11.d4 Rc8 12.Rc1 Ne4 13.Ne5 (13.cd5 Bd5 14.Nc4 Bf6=) 13...f6 (13...cd4!? 14.ed4 Ne5 15.de5 Bc5=+) 14.Nd7= Qd7 15.f3 (15.cd5 ed5 16.dc5 Bc5+=) 15...Ng5 (15...Nd6 16.cd5 ed5 17.dc5 bc5 18.Qd2=) 16.Bd3 (16.cd5 ed5 17.dc5 Bc5=) 16...f5 (16...cd4 17.ed4 Ba3 18.Ba3 dc4 19.Rc4 Rc4 20.Bc4= (20.Bf8?? Rd4 21.Ba3 Rd3–+)) 17.f4 (17.cd5 ed5 18.dc5 Bc5=) 17...Ne4 18.Rf3 (18.cd5 ed5 19.dc5 Nc5=+) 18...cd4 19.ed4 Rf6 (19...Rc7 20.Qe2=+) 20.Rh3 (20.cd5 Rc1 (worse 20...Qd5 21.Rc8 Bc8 22.Nc4+=) 21.Qc1 ed5=) 20...Rg6 21.Rc2 (21.Be4 fe4 22.Rhc3 Qd6=+) 21...Bd6 (21...Nf6 22.g3=+) 22.Bc1 Qe7 (better 22...Nf6 23.g3 Ng4–/+) 23.Nb1? (23.cd5 Rc2 24.Nc2 Nc3=+) 23...Rg4 (better 23...dc4!? 24.Bf1 Bd5–+) 24.Qf1 (24.Be4 de4 25.Be3 Bf4 26.Bf4 Rf4–/+) 24...Qf6 25.Be3 Rh4 (25...dc4 26.Be2–/+) 26.g3 (better 26.Rh4!? Qh4 27.Be4 fe4 28.c5+=) 26...Rh3=+ 27.Qh3 Qg6 (27...dc4 28.Rc4 Rc4 29.Bc4=+) 28.Nd2 (28.Be4 fe4 29.c5 Qf6+=) 28...Bb4 (28...Nd2 29.Bd2 Qf6 30.Be3=) 29.Nf3 (29.Be4 de4 30.c5 Bd2 31.Rd2 Bd5=) 29...Bd6 (29...dc4 30.Rc4 Nc3 31.Rc8 Bc8 32.Ne5=) 30.Ne5 (30.Be4 fe4 31.Ne5 Be5 32.de5 d4 33.Bd4 e3–/+) 30...Be5= 31.de5 Nc5 32.Bc5 Rc5 33.Qf1 Qe8 34.Qc1 (better 34.Be2=) 34...Qd8 35.cd5? (35.Qd2 Qd7 36.Bf1=) 35...Qd5 (35...Rd5?! 36.Be2=) 36.Bf1 (36.Qd2 Qh1 37.Kf2 Qh2 38.Ke3 Qg3 39.Ke2 Qf3 40.Ke1–+) 36...Qh1 (36...Qd4 37.Qe3 Qe3 38.Rf2 Rc2 39.Be2 Re2 40.Kf1 Qf2) 37.Kf2–+ Rc2 (37...Rc2 38.Qc2 Qh2 39.Ke1 Qc2–+) 0–1. Kleist,Werner (1665) – Fleischer,Ernst (1675), 17 sen. Bad Sooden op, 2005.

8.a4 Bd7 9.0–0. Hunt,Lorne – Raymer,Evan, Victoria Labour Day op, 2005.

8.a4 Nbd7 9.0–0 Nb6 (9...dc4 10.Na3=) 10.Ne5 (10.d3 Bd6=) 10...Nfd7 11.cd5 ed5 12.Qc2 (12.Nf3 Re8=) 12...Ne5 13.Be5 Be6 (13...Bf6 14.d4 Be5 15.de5=) 14.d3 (14.d4 Nd7=) 14...Bf6 (14...Re8 15.Nd2=) 15.Qc3 (15.Bf6 Qf6 16.Nd2 Rfc8=) 15...Be5 16.Qe5 Nd7 17.Qf4 b6 (17...Qf6 18.Qf6 Nf6 19.Nd2=) 18.Nd2 (18.d4 Rc8=) 18...Rc8 19.Rfc1 Qf6 (19...Re8 20.Rc2=) 20.Qf6 Nf6 (worse 20...gf6 21.Rc2=) 21.Nf3 (21.Kf1 Rfe8=) 21...Nd7 (21...Rfe8 22.Kf1=) 22.Rc2 (22.Rc3 Rfe8=) 22...f6 (22...Rfe8 23.Rac1=) 23.Rac1 Bf5 (23...Rfe8!?=) 24.Nd4+– Bg6 25.Ne6 Rfe8 26.Nf4 Re5? (26...Bf7!?=) 27.Ng6 (27.Bf3 Rce8 28.Bd5 Bf7+–) 27...hg6 28.Bf3 Rce8 29.h4 g5 30.d4 cd4 31.ed4 Re1 32.Re1 Re1 33.Kh2 gh4 34.Bd5 Kh7 35.Rc6 (35.Kh3 Rh1 36.Kg4 Kh6+–) 35...Rd1 (35...Kh6!?+–) 36.Rd6+– Nf8 37.Bb3 Rd2 38.Rb6 Rd4 (38...Rf2 39.Rd6 Rb2 40.Bd5+–) 39.Ra6+– Nd7 40.Ra5 Ne5 41.b6 Ng4? (better 41...Rb4 42.Bc2 Kh6+–) 42.Kg1 Rb4 (42...Kh6 43.f3 Ne5+–) 43.Rb5 Rb5 (43...Rd4 44.b7 Rd8+–) 44.ab5 Ne5 45.Be6 1–0. DEFFM – Reckert, freechess.org, 2018.

7.Be2 a6

8.0–0 ab5 9.cb5 b6 10.d4 c4 11.Nc3 Bb7 (11...Nbd7 12.Qc2=) 12.e4 (12.Qc1!?=) 12...Ne4 13.Ne4 de4 14.Ne5 Bd5 15.Nc4 (15.Qc2 Qd6=+) 15...Nd7 16.a4 f5 (16...Qc7 17.Ne3=+) 17.Ne3= Rf6 (17...Nf6 18.Nd5 ed5 19.Qb3=) 18.f3 (18.Nd5 ed5 19.Rc1 Rh6=) 18...Rh6 (18...Ra7 19.Bc4 Bc4 20.Nc4=) 19.Nd5 ed5 20.fe4 fe4 21.Qb3 Nf6 22.Bc1 Rg6 23.Bd2 (23.Bf4 Bd6+=) 23...Qc7?? (better is 23...Bd6=) 24.Rf6!+– (24...gf6 25.Qd5 Kg7 26.Qa8+–) 1–0. Schirmer,Michael (2140) – Klawitter,Bernd, DESC, 2002.

8.0–0 ab5 9.cb5 Nbd7 10.Qc2=+.

8.0–0 ab5 9.cb5 Nbd7 10.Re1 b6 11.d3 Qc7 12.Nbd2 Bb7 13.Qc2 Ng4 14.d4 c4 15.e4 (15.Bd3 Ngf6=+) 15...Rfc8–/+ 16.Rec1 Bb4 17.a3 Bd2 18.Qd2 Ndf6 19.e5 Ne4 20.Qf4 c3 (< 20...Nef2 21.Ne1 Ne5 22.de5+/– (< 22.Qe5 Ne4=); 20...Ngf2?! 21.Rf1 Nd3 22.Bd3 cd3 23.Ng5–/+) 21.Rab1 (21.Qg4?? cb2 22.Rd1 ba1R 23.Ra1 Qc2–+) 21...Qe7 (21...Ngf2!? 22.Bc3 Nh3 23.gh3 Nc3–/+) 22.Qg4= cb2 23.Re1 (23.Rf1!? Nc3 24.Rb2 Qa3 25.Rc2=+) 23...Qa3–+ 24.Ng5 Rc1 25.Nf7 (25.Ne6 g6 26.Nd8 Re1 27.Re1 Qa1–+ (< 27...Rd8 28.Rf1 Rf8 29.Qh3 Qh3 30.gh3–+)) 25...Re1 (25...Kf7?! 26.Qf4 Kg8 27.Rbc1–+) 26.Re1 Kf7 27.Qh5 (27.Rf1 Qb3 28.Bd1 b1Q 29.Bb3 Qb3–+) 27...Kg8 28.Rd1 Qf8 29.h4 Ra1 (30.f4 Rd1 31.Bd1 b1Q–+) 0–1. Pierre (2190) – Hydra65 (2540), Rated game, 3m + 0s, 2005.

8.0–0 ab5 9.cb5 Ne4 10.Qc2 Nd7 11.a4 (11.d4=) 11...c4 (better is 11...Bd6!?=) 12.Bc4+= Ndf6 (12...Nf2 13.Rf2 dc4 14.Qc4+/–) 13.Bd3 (13.Be2 Bd7+/–) 13...b6 (13...Bd7 14.Nc3 Nc5 15.Rfc1+/–) 14.Be5 (14.Rc1 Bd6+/–) 14...Bd6 (14...Qd7 15.Qc6 Qa7 16.Bc7+=) 15.Be4 de4 (16.Bf6 Qf6 17.Qe4 Bb7+/–). pcmvr (2225) – purplepeace (2210), net–chess.com, 2006.

8.0–0 b6 9.ba6 Ba6 10.d3 Nc6 11.a4 d4 12.ed4 cd4 13.Na3 e5 14.Nb5 Bb4 15.Nd2 Qd7 16.Bf3 Bb7 17.Ne4 Ne8 18.Ba3 Ba3 19.Ra3 Kh8 20.Re1 f5 21.Nd2 Nc7 22.Nc7 Qc7 23.Rb3 Ra4 24.Rb6 Rb4 (24...Ra3!? 25.c5 Rd3=) 25.Rb4+= Nb4 26.Qb3 Rb8 (26...Nc6!?+=) 27.Bb7+/– Rb7 28.Nf3 Nc6 29.Qa3 Qb8 (better is 29...Ne7!?+=) 30.Qc5+/– Qe8 31.Nd4! (worse is 31.Ne5 Ne5 32.Kf1 Re7+=) 31...Nd4 (31...Nd4 32.Qe5 Double attack (32.Qe5 Decoy); 31...ed4 32.Re8 mate Mate attack) 32.Qd4 Rb1 (32...ed4?? 33.Re8) 33.Qc3 Qb8 34.h3 Re1 35.Qe1 Qd6 36.Qe3 h6 37.c5 Qd5 38.Qc1 Qc6 39.Qc3 e4 40.d4 f4 41.Kh2 Kh7 42.Qc1 g5 43.d5! Qe8 (43...Qd5 44.c6 Passed pawn) 44.c6 e3 45.d6 ef2?! (45...e2 46.d7 Qe7 47.Qc2 Kg7 48.Qc3 Kf7 49.Qc4 Kf8+–) 46.Qc2 Kg7 47.Qf2 (47.Qf2 Qe5 48.d7 f3 49.Qg3+–) 1–0. Pcmvr (2110) – Edmonte (2100), playchess.de, 2006.

8.0–0 h6 9.a4 (9.Qa4 Nbd7 10.ba6 (10.cd5 ed5 11.ba6 ba6 12.Nc3 c4 13.Qc2 Nc5 14.Nd4 Qd6 15.d3 Ng4 16.Bg4 Bg4=; 10.d3 Nb6 11.Qc2 ab5 12.cb5 Nbd7 13.Rc1 Bd6 14.d4 c4 15.Nc3 Qa5 16.a4 Bb4=) 10...dc4 11.Na3 Ra6 12.Qc4 b6 13.Qc2 Ra8 14.Nb5 Bb7 15.Rfb1 Nd5 16.a3 Ra5=) 9...dc4 (9...b6 10.d4 Bb7 11.Nc3 ab5 12.ab5 dc4 13.Ra8 Ba8 14.Bc4 Qd6 15.Ba3 Qc7 16.Qe2 Rc8=+) 10.Bc4 ab5 11.ab5 Ra1 12.Ba1 Nbd7 13.Ne5 (13.Qc2 Nb6 14.Be2 Nbd5 15.d4 b6 16.dc5 Bc5+=) 13...Ne5 14.Be5 Bd6 (14...Nd7 15.Bc3= Bd6 16.d3 Qh4=) 15.Bd6 (15.f4 Nd5= 16.Qg4 Nf6=) 15...Qd6 16.Qe2 (16.Qf3 e5=). grobler – uoiea, ChessWorld.net, 2002.

8.Na3 ab5 9.Nb5 dc4 10.Bc4 Nbd7 11.0–0=.

8.Na3 ab5 9.Nb5 Bd7 10.0–0 Bb5 (10...Bc6 11.d3=) 11.cb5 c4 (11...Bd6 12.Qc2=) 12.a4 (12.d3 cd3 13.Bd3 Nbd7=) 12...Nbd7 13.d3 cd3 14.Bd3 Nc5 15.Bc2 Rc8 (15...Nfe4 16.Nd2=) 16.a5 (16.Bd4 Qa5=) 16...Nce4 (16...Ra8 17.b6=) 17.Bd3+= Nc5 (17...Qc7 18.Qe2+=) 18.a6 ba6 19.ba6 Ra8. pcmvr (2225) – amikhlin (2270), net–chess.com, 2006.

8.Na3 ab5 9.Nb5 Bd7 10.a4 Nc6 (10...Bc6 11.0–0=) 11.0–0 Qb6 (11...dc4 12.Bc4 Na5 13.Be2=) 12.Ne5 Rfd8 (12...Ne5 13.Be5 Qa5 14.Bf3=) 13.d3 d4 14.Nd7 Nd7 (14...Rd7 15.Bf3=) 15.Qb3 (15.Qd2 Bg5=) 15...Bf6 (15...Nde5 16.Rfe1=) 16.e4 (16.Qc2 de3 17.fe3 Bb2 18.Qb2 Nde5=) 16...Ra6 17.Bc1 Rda8 18.Bd2 Qd8 19.Ra3 Nb6 (19...e5 20.Rb1=) 20.Rfa1 Nc8 (20...Be7 21.Qc2=) 21.R3a2 (21.Qb2 Bg5=) 21...e5 22.g3 (22.Qb2 Nb6=) 22...Bg5=+ 23.Bg5 (23.f4 Bh6=+) 23...Qg5 24.Nc7 Rb6 25.Qd1 Ra5 26.Nd5 Rba6 27.Qb1 (27.Rb1 Nd6=+) 27...Ra7 (27...Nd6 28.Kg2–/+) 28.Kg2 (28.Rb2 Nd6=+ (worse 28...Ra4 29.Ra4 Ra4 30.Rb7+=)) 28...N6e7 29.Nc7 (29.Qf1 Nd5 30.ed5 Nd6=+) 29...Qg6 (29...Ng6 30.Nb5 Ra8 31.Nc7=+) 30.Qc1 (30.Rb2 Qc6 (30...Ra4?! 31.Ra4 Ra4 32.Rb7=) 31.Nd5 Nd5 32.cd5 Qd7=+) 30...Qb6 (30...Nb6 31.f4=+) 31.Nd5 (31.Nb5 Ra8=+) 31...Nd5 32.cd5 Qd8 33.Rb2 (33.Bg4 Ne7=+) 33...Nd6 34.Rab1 (34.f4 ef4 35.Qf4 b5=+) 34...h6 (34...f5 35.ef5 R7a6 36.Bd1=+) 35.Bd1 (35.Rb6 Ra4 36.Qc5 R7a6=+) 35...c4 (35...Qe7 36.f4=+) 36.dc4 Rc5 (36...Qc7 37.Qc2 Rc5 38.Qe2=+) 37.Bb3= Qf6 (37...Qc7 38.Qe1=) 38.Qc2 Ra8 (38...Qg6 39.f3+=) 39.Ba2 Qe7 (39...Qg6 40.Rb6+=) 40.Rb6 (40.Rb4 Qf6+=) 40...Ra7 (40...Qc7 41.R6b4+=) 41.R6b4 Ra8 42.Qd3 Rc7 43.R1b2 ½–½. Degterev,Pavel (2025) – Boettcher,Fred (2105), IECG, 2006.

8.a4 a5 9.0–0 Nbd7 10.d4 dc4 (10...b6 11.Nbd2=) 11.Bc4 (11.Nbd2 c3 12.Bc3 b6+=) 11...Nb6 (11...cd4 12.Qd4 b6 13.Rd1=) 12.Nbd2+= Nfd5 13.Bb3 (13.Bd3 Nb4 14.Be2 cd4 15.Bd4 f6+=) 13...Nb4 (13...cd4 14.Bd4 Bf6 15.Ne4 Bd4 16.Qd4+–) 14.Nc4 (14.Qe2 cd4 15.Bd4 Bf6+=) 14...Nc4 (14...Nd7 15.Rc1+=) 15.Bc4 b6 (15...Bf6 16.Rc1+=) 16.Ne5 Bb7 (16...Qc7 17.dc5 Bc5 18.Rc1+–) 17.dc5+– Bc5 (17...Qd1 18.Rfd1 Bc5 19.Rd7+–) 18.Qg4 Qf6 19.Rad1 (better 19.Nd3 Qh6 20.Nc5 bc5 21.e4+–) 19...Rfd8?? (better 19...Bd5+–) 20.Nf7!+– Kf7 (20...Qf7 21.Be6 Pinning (21.Be6 Decoy); 20...Kf7 21.Bf6 Discovered attack) 21.Bf6 (21.Bf6 Nd5 22.Qg7 Ke8 23.Qg8 Kd7 24.Qf7 Kc8 25.Bd8+–) 1–0. DEFFM – GuestJPLS, freechess.org, 2018.

8.a4 Bd7 9.Nc3 dc4 10.Bc4 ab5 11.ab5 Ra1 12.Ba1 h6 13.0–0 b6 14.Qb3 Qc7 15.Re1 Rc8 16.Qc2 Bd6 17.h3 Be8 18.Ne4 Nh7 19.Nd6 Qd6 20.Be5 Qe7 21.Qb2 f6 22.Bc3 Bf7 23.Qa2 Ng5 24.Ng5 hg5 25.Ra1 Rc7 26.Qa8 Rb7? (better is 26...Qd8+/–) 27.Bd3+– f5 28.Be5 Kh7? (28...Rd7 29.Qb8 Rd8 30.Qb6 Rd3+–) 29.Bb8 Rd7 30.Ra7 g6 (30...Bh5 31.Bc4 Be8 32.Rd7 Qd7 33.Qa7 Qd2 34.Be5+–) 31.Rd7 Qd7 32.Qa7 (32.Qa7 Qa7 33.Ba7+–) 1–0. Koerner,Helmut (1945) – Schoenemann,Manfred (1820), Berlin Lichtenberger op 8th, 2009.

8.a4 Ne4 9.0–0 ab5 10.ab5 Ra1 11.Ba1 b6 12.d3 Nd6 (12...Nf6 13.d4=) 13.Nc3 dc4 (13...Bf6 14.cd5 Bc3 15.Bc3 ed5 16.Be5=) 14.dc4 Bb7 15.Bb2 (15.Qc2 Bf3 16.Bf3 Nc4=) 15...Nd7 (15...Bf3 16.gf3 (< 16.Bf3 Nc4 17.Qe2 Nb2 18.Qb2 Bf6=+) 16...Bf6 17.Bd3=) 16.Qb3 (16.Qc2 Bf3 17.gf3 Qe8=) 16...Qc7 (16...Bf6 17.Rd1 Qc7 18.Nd2=) 17.Ra1 Rd8 18.h3 (18.Ra4 Nf5=) 18...h6 (18...Bf6 19.Nd2=) 19.Qc2 Bf6 20.Nd2 Nf8 (20...Nb8 21.Ra3=) 21.Ra2 (21.Na4 Bb2 22.Nb2 e5=) 21...Qe7 22.Nce4 Ne4 23.Ne4 Bb2 24.Rb2 Ng6 25.Nd2 Nh4 26.Bf1?? Qg5–+ 27.Ne4 Nf3 28.Kh1 Be4 29.Qe4 Nd2 30.Rd2 Rd2 31.Kg1 Qf6 32.f3 Qa1 33.Qh4 Qc1 34.Qg3 Rd1 35.Qf2 Qc4 (36.g4 Qb5–+) 0–1. Nokarookoff – oldsage, ChessWorld.net, 2006.

8.a4 Ne4 9.0–0 Bf6 10.d4 ab5 (10...Qc7 11.Qb3=) 11.ab5 Ra1 12.Ba1 Qc7 13.Nbd2 Nd2 (13...cd4 14.cd5 Nc3 15.Bc3 dc3 16.Ne4+–) 14.Nd2 (14.Qd2 dc4 15.Rc1 cd4 16.Bd4 e5 17.Rc4 Qd8+–) 14...Nd7 (14...cd4!? 15.cd5 de3 16.Bf6 ed2=) 15.cd5+= ed5 16.dc5 Ba1 17.Qa1 Nc5 18.Rc1 (18.Qd4 Be6+=) 18...b6 19.Qb2 Qd6 20.Qd4 (20.Qb1 Re8+=) 20...Bb7 (20...Bf5 21.Rd1 Qe6 22.Bf3=) 21.Ra1 f6 (21...Ne6 22.Qd3+=) 22.Bf3 Exerts pressure on the isolated pawn (22.Ra7 Ra8 23.Ra8 Ba8+=) 22...Qe5 (22...Ra8 23.Ra8 Ba8 24.Nb1+=) 23.Ra7 Ra8? (23...Rd8 24.h3+=) 24.Ra8?? (better 24.Rb7 Nb7 25.Bd5 Kf8 26.Bb7 Qd4 27.ed4 Ra1 28.Nf1+–) 24...Ba8+= 25.g3 (25.Be2 Qd4 26.ed4 Ne6=) 25...Qd4 (25...Bb7 26.Qg4=+) 26.ed4 Ne6 27.Nb3 Kf7 (27...Bb7=) 28.Kf1 (28.h4 Nc7 29.Bh5 Ke7=) 28...Nc7 (28...Bb7!?–/+) 29.Be2= Bb7 30.Na1 (30.Nd2 Bc8 31.Nb1 Bh3 32.Ke1 Ne6=) 30...Bc8 31.Nc2 Bd7 Attacking the isolated pawn on b5 (better 31...Bf5 32.Na3 Ne6=+) 32.Nb4 (better 32.Na3!?=) 32...Ke6–/+ (32...Nb5?! 33.Nd5 Nd4 34.Nb6=+) 33.Na6? (better 33.Bd3 Bb5 34.Ke2–/+) 33...Ne8?? (better 33...Nb5 34.Bd3 Nd4–+) 34.Bd3+= g6 35.Ke2 Kd6 36.Nb8 Bc8 37.Kd2 (37.f4 Nc7 38.Ke3 Bf5=) 37...Bb7 (37...Nc7 38.Kc3=) 38.Kc3 (38.f3 f5+=) 38...Nc7 (38...f5 39.Na6=) 39.h4 (39.Na6 Ba6 40.ba6 b5+=) 39...Ne6 40.h5 (40.Be2 g5=) 40...f5 (40...gh5 41.Na6=) 41.g4 (41.hg6 hg6 42.f4 Nf8=) 41...Ng7 (41...fg4 42.hg6 h5 43.Be2=+) 42.f3 (42.h6 Ne8+=) 42...fg4 (42...gh5 43.gf5 (43.Bf5? h4 44.Bd3 Ne6–+) 43...Ne8 44.Kd2=) 43.fg4 g5?? (43...gh5 44.gh5 Nh5 45.Bh7=) 44.Na6?? (better 44.Bh7!? Ne8 45.Bf5 Ke7+–) 44...Bc8? (better 44...h6 45.Be2 Ne6=) 45.Be2?? (better 45.h6 Ne8 46.Bh7+–) 45...Ne6 (45...Ne8 46.Nb4 Nf6 47.Nd3 Bg4 48.Bg4 Ng4 49.Nb2–+) 46.Nb4 (46.Nb8 Nf4 47.Bd1 Nh3–/+) 46...Nf4 (46...Bd7 47.h6 Nf4 48.Bd1=) 47.Bf3 (47.Bd1 Bd7 48.h6 Bb5+=) 47...Bd7–/+ 48.Nc2 (48.Nd3 Nd3 49.Kd3 Bb5 50.Kc3 h6–/+) 48...Bb5 49.Kd2 (49.Ne3 Ke6–/+) 49...Bd7 (49...Bc4 50.Ne3–/+) 50.Ne3 b5 (50...h6 51.Kc3–/+) 51.Kc3 Kc6 52.Nc2 (52.h6 Be8–/+) 52...Kb6 53.Nb4 Bc6 (53...Be6 54.h6–/+) 54.Nc2 (54.Nc6 Kc6 55.h6 Kb6–/+) 54...Ka5 55.Nb4 Bb7 (55...Bd7 56.h6–/+) 56.Nc2 (56.h6!?=+) 56...Ne6 57.Nb4 (57.Be2 h6–/+) 57...Nd4 58.Bd5 (58.Kd4 Kb4 59.h6 Bc6=) 58...Bd5 (58...Ne2!? 59.Kd2 Kb4 60.Bb7 Nc3–/+) 59.Nd5=+ Nf3 (better 59...Ne6=+) 60.Kb3? (60.Nf6 Ka4 61.Kb2–/+) 60...Ne5–+ 61.Nf6 (better 61.Ne3–+) 61...b4?? (61...h6 62.Ka3–+) 62.Ne4?? (62.Nh7!? Nf7 63.Nf6+=) 62...Nf3?? (62...h6 63.Nf6–+) 63.Nd6 (63.Nf6 Ne5 64.Nh7 Nf7+=) 63...Ne5 (63...Nd2 64.Kc2 Nf1 65.Kb3–/+) 64.Ne4–+ Nf3?? (64...h6 65.Nf6–+) 65.Nd6–/+ Nd4 (65...Nd2 66.Kc2 Nf1 67.Kb3–/+) 66.Kc4 (66.Kb2 Ne6 67.Ne4 Kb5=+) 66...Nc6 (better 66...Ne6!?–/+) 67.Kb3= Kb6 (67...Nd8 68.Nc4 Kb5 69.Nd6 Kc6 70.Ne4–/+) 68.Ne4 (68.Nf7 Nd4 69.Kb4 Nf3=) 68...Kb5 (68...h6 69.Nf6 Kb5–/+) 69.Ng5+– Nd4 (69...Na5 70.Ka2 b3 71.Kb1 Kb4=) 70.Kb2+– Kc4 (better 70...h6+–) 71.Ne4?? (71.Nh7!? Kd5+–) 71...Kd3?? (71...Ne6!?=) 72.Nc5 (better 72.Nf6!?+–) 72...Kc4 (72...Ke3!? 73.g5 Nf5+=) 73.Ne4 (better 73.g5!? Nf5 74.Ne6+–) ½–½. Schwichtenberg,Juergen – Mayer,Albert, Hessen–ch Seniors, 2000.

8.ba6 Na6 9.0–0 dc4 10.Bc4 b6=.

8.a4 ab5

9.ab5 Ra1

10.Ba1 dc4 11.Bc4 b6 12.d4=.

10.Ba1 dc4 11.Bc4 Nbd7 12.0–0 Nb6 13.Be2 Nfd5 14.d4 Bd7 15.dc5= Bc5 16.Qb3 Qe7 17.Ne5 Ra8 18.Nd7 Qd7 (18...Ra1 19.Nb6 Nb6 20.Rd1=) 19.Nc3 Nc3 (19...Be7 20.Nd5 Nd5 21.Rc1=) 20.Qc3+= Bf8 21.Rd1 Qe7 22.Bf3 f6 (22...Nd5 23.Qd4+=) 23.Qd4+– Qc7 (23...Na4!?+–) 24.Qe4+– (24.Qe4 e5 25.Qb7 Qb7 26.Bb7+–) 1–0. DEFFM – GuestCZNT, freechess.org, 2019.

10.Ba1 dc4 11.Bc4 Nbd7 12.0–0 Nb6 13.Be2 Nfd5 14.d4 Bf6 15.Nbd2 cd4 16.Nd4 (worse 16.Bd4 Bd4 17.Nd4 e5–/+) 16...e5 17.N4f3 Re8 18.Ne4 Bf5 (18...Qe7 19.Nf6 gf6 20.Qb1=) 19.Nf6 gf6 (worse 19...Qf6 20.Ne5 Re5 21.f4 Ne3 22.Be5+– (22.fe5?? Qg5 23.Bf3 Nd1 24.Rd1 Bc2–+)) 20.Nd2 (20.Nh4 Bg6+=) 20...Bg6 21.Nc4 Qc7 22.Nb6 Nb6 23.Qb3 Rc8 24.Qb4 Nd5 25.Qg4 Nc3 26.Bc3 Qc3 27.Rd1 Kh8 (27...Qc2 28.Bd3 h5 29.Bc2 hg4 30.Bg6 fg6 31.g3=) 28.Qd7 Rc7 29.Qd8 Kg7 30.Bf1 (30.h4 Bf5=) 30...Qc2?? (better 30...Bf5=) 31.Rd6+– (31.Rd6 Rc8 32.Qf6 Kg8 33.b6+–) 1–0. DEFFM – denij, freechess.org, 2019.

10.Ba1 Nfd7 11.Qc2 Bf6 (11...Nf6 12.0–0+=) 12.d4 (12.Bf6 Nf6 13.cd5 Qd5+=) 12...cd4+= 13.ed4 (13.Bd4 Qc7+=) 13...dc4 14.0–0 Qb6 (14...Nb6 15.Nbd2+=) 15.Bc4 Qd6 (15...Be7!?+–) 16.Bd3+– h5 (16...g6!?+–) 17.Bb2 Rd8 18.Ba3 Qf4 19.Bc1 Qd6 20.Ba3 Qf4 21.Nbd2 Nb6 22.Ne4 Bd4?? (22...N8d7+–) 23.Nd4 Rd4 24.Bd6! Rd6 (24...e5 25.Bb8 Bf5 26.Nf6 gf6 27.Bf5 Na4+–) 25.Qc7 Qe5 (25...Qf5 26.Nd6 Qd3 27.Qb6 Bd7+–) 26.Nd6 N8d7 27.Qd8 Nf8 28.Qb6 (28.Qb6 Bd7 29.Rd1+–) 1–0. DEFFM – ziggip, freechess.org, 2019.

10.Ba1 Ne4 11.0–0 Bf6 12.d4 (12.Bf6 Qf6 13.Qb3 Nd7+–) 12...b6 (12...Nd7 13.Qc2+=) 13.Nbd2+= Nd2 14.Qd2 Bb7 (14...cd4 15.Bd4 dc4 16.Rd1+=) 15.dc5 Ba1 (15...bc5!? 16.cd5 Ba1 17.Ra1 ed5+=) 16.c6+– (worse 16.Ra1 bc5 17.cd5 ed5+=) 16...Bc6 (16...Bf6!? 17.cb7 Qd7+–) 17.bc6 (17.Ra1?! Bb7+=) 17...Bf6 18.cd5 ed5 19.Rc1 Qc7 20.Qd5 Rd8 21.Qe4 Nd7 22.Qc4 Nc5 (22...Nf8 23.Nd4 Bd4 24.ed4+–) 23.Nd4 Bd4 (23...g6 24.g3+–) 24.ed4 Ne4 25.d5 Nc5 (25...Re8 26.g3+–) 26.Bf3 Qe5 27.Qb4 Nd3 (27...Re8 28.Rf1 (28.Qb6?? Qe1 29.Re1 Re1) 28...Qc7 29.Rd1+–) 28.Qc3 Qc3 (28...Qf5 29.c7 Rc8+–) 29.Rc3 Nc5 (29...Re8 30.h4 Ne5+–) 30.d6! Rd6 (30...Re8 31.g3 Ne6 32.c7 Nc7 33.dc7+–) 31.c7 (31.c7 g6 32.c8Q Kg7 33.Qc7+–) 1–0. DEFFM – GuestSVNL, freechess.org, 2019.

10.Ba1 Qa5

11.Bc3 Qb6=.

11.Nc3 b6 12.0–0 (12.Qa4 Qa4 13.Na4 Nbd7=) 12...dc4 (12...Bb7 13.Ne5=) 13.Ne5 Rd8 (13...Qa8 14.Na4 Nbd7 15.Nc4=) 14.Nc4 (14.Qc2 Nd5+=) 14...Qa7 15.f4 (15.d3 Qc7+=) 15...Qc7 16.Qe1 Bb7 17.Qg3 Ne4?? (better is 17...Nbd7=) 18.Ne4+– (18.Ne4 g6 19.Nf6 Bf6 20.Bf6+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

11.Nc3 dc4 12.Bc4 Nbd7 13.0–0=.

11.Nc3 dc4 12.Bc4 Rd8 13.0–0 Nbd7 (better 13...b6=) 14.Bb2?? (14.Qc2 Bd6=) 14...Nb6?? (better 14...Qb4 15.Qb3 Nb6 16.Qb4 cb4–+) 15.Be2= Nbd5 (15...Qb4 16.Qc2=) 16.Qb3 Nb4 (16...Qb6 17.Ra1+=) 17.Ra1 (17.Qc4 Nbd5+=) 17...Qc7 18.d4 (18.Na4 Nfd5=) 18...b6 (18...cd4 19.ed4 Nfd5 20.Nd5 Nd5 21.Ne5=) 19.Rc1 (19.dc5 bc5 (worse 19...Qc5 20.Ba3+–) 20.Ra8 Bb7 21.Rd8 Qd8=) 19...Bb7 20.Na4 Bd5?? (better 20...Nbd5=) 21.Qb4!!+– c4 (21...cb4 22.Rc7 Pinning (22.Rc7 Deflection)) 22.Qe1 (22.Qc3 Bd6+–) 22...Qa7 (22...Ra8 23.Nc3 Bd6 24.Nd2+–) 23.Nc3 Bb4 24.Qf1 (24.Nd2 Rc8+–) 24...Ne4 (24...Bc3 25.Bc3 Qa4 26.Ne5 Qb5 27.f3+–) 25.Ne4 Be4 26.Bc4 1–0. DEFFM – GuestCYGH, freechess.org, 2016.

11.Nc3 dc4 12.Bc4 Rd8 13.Qa4 Qc7=.

11.Nc3 dc4 12.Bc4 Rd8 13.d3=.

11.Nc3 Rd8 12.0–0 dc4 13.Bc4 Bd6=.

11.Nc3 Rd8 12.Qa4 Qa4 13.Na4 dc4 14.Bc4 Nbd7 15.0–0 (15.d4 Nd5=) 15...Nd5 (15...b6 16.d3=+) 16.d3 N7b6 (16...Bd6 17.Nc3 N7b6 18.Ne4=) 17.Nb6 (17.Bd5 Nd5 18.Rc1 b6=) 17...Nb6 18.Rc1 (18.Be5 Nc4 19.dc4 g5=) 18...f6 (18...Nc4 19.dc4 f6 20.Bc3=+) 19.Bc3 (19.d4 Nc4 20.Rc4 Bd7=+) 19...Nc4=+ 20.dc4 e5 21.Be1 (21.Ba5 Rd3=) 21...Be6 (21...e4 22.Nd2 f5 23.Rd1=+) 22.Nd2 (22.e4 Kf7=+) 22...Ra8 (22...f5 23.Ra1–/+) 23.Kf1 (23.e4 f5=+) 23...Ra4 (23...Ra2 24.Ke2–/+) 24.Ke2 (24.e4 f5=+) 24...f5 25.f3 b6 (25...Kf7 26.e4=+) 26.h3 (26.Bg3 Bf6=+) 26...Ra2 (26...Kf7 27.e4=+) 27.Kd1 (27.e4 fe4 28.fe4 Bg5=+) 27...g5 Black prepares f4 (27...Kf7 28.Rc2 Ra1 29.Ke2–/+) 28.Rc2=+ Ra4 (28...Ra1 29.Ke2–/+) 29.Ke2 h5 30.Kf2 (30.e4 f4=+) 30...f4 (30...g4 31.hg4 hg4 32.fg4 fg4 33.e4=+) 31.e4 (31.g4 fg3 32.Kg3 Kf7–/+) 31...g4 32.hg4 hg4 33.Ke2 (33.fg4 Bg4 34.g3 Ra3=+) 33...g3 34.Kf1 (34.Rc1 Kf7–/+) ½–½. Luettig,Hendrik – Harms,Peter, Pinneberg–ch op, 1996.

11.Nc3 Rd8 12.Qa4 Qb6 13.Qa3 Nbd7 14.0–0 Bf8 (14...dc4 15.Bc4 Qd6 16.Rd1=) 15.Qa8 Qc7 16.Qa7 Qb6 (16...dc4 17.Rc1=) 17.Qa2 Qd6 18.d4 b6 19.Rd1 Bb7 20.Bb2 Ra8 ½–½. Briscoe,C (2265) – Gavriel,T (2135), 96th ch–GBR, Torquay ENG, 2009.

11.Nc3 Rd8 12.Qa4 Qc7 13.cd5 ed5 14.0–0=.

10.Ba1 b6

11.0–0 Nbd7 12.d4 Bb7 13.Nbd2 Qc7 14.Qb3 Ra8 15.Bb2 h6 16.Ra1 (16.Rc1 Bd6=) 16...Ra1=+ 17.Ba1 Qb8 (17...cd4 18.Nd4 Bd6 19.h3=+) 18.Qa2 (18.Qc2 dc4 19.dc5 Nc5=) 18...Qa8 (18...cd4 19.Nd4 Qc7 20.Bb2=) 19.Qa8 Ba8 20.dc5 Bc5 21.Ne5 (21.Nd4 Bb4 22.N2f3 dc4+=) 21...Ne5 22.Be5 Nd7 (22...Bb4 23.Nb3=) 23.Bc7 dc4 (23...Bb4 24.Nb3=) 24.Bc4 Kf8 (24...Bb4 25.Nb3+=) 25.Nb3+= Bb4 26.Nd4 Bc5 (26...Be4 27.f3 Bd5 28.Bd5 ed5 29.Kf2+=) 27.Kf1 (27.Nc6 Nf6+=) 27...Ke8 28.Nb3 Bb4 29.Nd4 (29.f3 Ke7=) 29...Bc5+= 30.g3 (30.f3 Bd5 31.Bd5 ed5+=) 30...Ke7 (30...Bd4 31.ed4 Bf3 32.h3=) 31.Nc6+= Ke8 32.Ke2 Bb7 33.f4 (33.Bd3 Nf6 34.Be5 Kd7 35.Nb8 Kc8 36.Bf6 gf6+=) 33...g6 (33...Nf6 34.Be5+=) 34.h3 h5 (34...Nf6 35.Be5 Nd5 36.e4+=) 35.g4 (35.Bd3!?+=) 35...hg4= 36.hg4 Nf6 37.Ne5 Nd7 (37...Nd5 38.Bd5 Bd5 39.g5=) 38.g5+= Ne5 (38...Bd5 39.Bd3+=) 39.Be5 (worse 39.fe5 Kd7 40.Bb8 Be7–/+) 39...Kd7 40.Bb8 (better 40.Kd3!?+=) 40…Bd6=+ ½–½. Lorenc,Tomas – Just,Pavel, CZE–chTV Czechia, 1998.

11.0–0 Bb7

12.Qc2 Nbd7 13.d3 Qc7 14.h3 Re8 15.Nbd2 Bd6 16.Bb2 e5 17.e4 de4 18.de4 Nf8 19.Ng5 h6 20.Ngf3 Ne6 21.Ra1 Nd4 22.Nd4 (22.Qd3!?=) 22...ed4=+ Increases the pressure on e4 23.Bd3 Nh5 24.Ra7 Nf4 25.f3? (25.Bf1 Qb8 26.Qa4 f5–/+ (26...Be4? 27.Ne4 Bf8 28.Ng3+–)) 25...Qc8 (better 25...Re6!?–+) 26.Nf1 Bb8 27.Ra1 Qe6 28.Bc1 Qe5 29.Bf4 Qf4 30.Qd2 Qh4 31.Qf2 Qg5 32.Kh1 h5 33.Kg1 h4 34.Kh1 Qf6 35.Kg1 g5 36.Ra2 Qe5 37.Ra1 Qf4 38.Qd2 (38.Qc2 Be5=+) 38...Qe5 (38...Qd2 39.Nd2 Bf4 40.Nb3–/+) 39.Qf2=+ Re6 40.Re1 Rf6 41.Qe2 Bc8 42.Ra1 Qe7 (42...Rd6 43.Ra8 Rd8 44.Qd2=+) 43.Ra8 Qb7 44.Ra1 Qc7 45.Ra8 Qb7 46.Ra1 Qc7 47.Ra8 Qb7 48.Ra1 ½–½. GuestVWGW – GuestXVWM, freechess.org, 2017.

12.d3 Nbd7 13.Nbd2 Qc7 14.Bb2 Ra8 15.Qb3 e5 16.cd5= Nd5 (16...Bd5 17.Qc3=) 17.Nc4+= Bf6 18.Nfd2 Be7 (18...g6 19.Bf3+=) 19.Bf3+= Rd8 (19...Nb4 20.Bg4+=) 20.Ra1+/– Qb8 21.Qa4 (21.h3 g6+/–) 21...Nb4+= 22.Ne5 (22.Ra3!?+=) 22...Ne5= 23.Be5 Qe5 24.Bb7 Rd3 (24...Nd3 25.Nc4 Qf6 26.Rf1=) 25.Nf3 (25.Nc4 Qe6 26.Rc1 g6=) 25...Qb2 (25...Qe6 26.e4+=) 26.Be4= Rd8 27.Rd1 Rd1 28.Qd1 c4 29.g3 c3?? (better is 29...Qf6=) 30.Qd7+– c2 (30...g6 31.Qe7 c2 32.Qd8 Kg7 33.Bc2 Nc2 34.Qb6 Na3 35.Qd4 Qd4 36.Nd4 Nc4+–) 31.Bc2 (better is 31.Ng5! c1Q 32.Kg2 Qf2 33.Kf2 Qb2 34.Kg1 Qa1 35.Kg2 Qa2 36.Kh3+–) 31...Nc2 32.Qe7 Qa1 33.Kg2 Qa8 34.e4 h6 35.g4 Qc8 36.Kg3 f6? (better is 36...Qe6 37.Qd8 Kh7+–) 37.Qd6 Qc3 (37...Qe8 38.Qb6 Na3 39.e5 fe5 40.Qc6 Qc6 41.bc6+–) 38.Qb6 Kh7 (38...Ne1 39.Qe3 Qe3 40.fe3+–) 39.Qc6 Qd3 40.Qd5 Qc3 (40...Ne1 41.Qd3 Nd3+–) 41.b6 Ne1 (41...Nb4 42.Qa5 Qc4 43.b7+–) 42.e5 Nf3 (42...h5 43.Qe4 Kh8 44.Qe1 Qc6+–) 43.Qf3 Qe5 44.Kg2 (44.Kh3 Qb8 45.b7+–) 44...Qb2 (44...Qe8+–) 45.b7 g6 46.Qc6 h5 47.Qc7 Kh6 48.b8Q (48.b8Q Qb8 49.Qb8+–) 1–0. Mihailov,Dimitri (1765) – Kamnev,Alexander (2010), St Petersburg RUS, Chigorin Mem, 2014.

12.d4 Nbd7 13.Nbd2 Qc7 14.Bb2 Rd8 15.Qb3 Bd6 16.Ra1 Ne4 17.g3 dc4 (17...cd4 18.ed4 Ndf6 19.Ne4 Ne4 20.Qe3=+) 18.Nc4= cd4 19.Nd6 Nec5 (19...Qd6 20.Nd4 Ndc5 21.Qd1=) 20.Qd1+= Bf3?? (better 20...Qd6 21.Qd4 Qf8+=) 21.Bf3+– (21.Qd4?! Ne5 22.Qe5 f6=) 21...Qd6 (21...de3 22.fe3 f6 23.Nc4+–) 22.ed4 Nb7 (22...Qc7 23.Qc2+–) 23.Bb7 Nc5 (23...Nf6 24.Bc6+–) 24.Bc6 (24.dc5?! Qd1 25.Rd1 Rd1 26.Kg2 bc5+–) 1–0. DEFFM – GuestTQDS, freechess.org, 2019.

12.d4 Nbd7 13.Nbd2 Qc7 14.dc5 Bc5 15.Bd3 e5 (15...Ra8 16.Qc2=+) 16.cd5= Nd5 17.Qc2 h6 (17...Nb4 18.Bh7 Kh8 19.Qf5+–) 18.Bh7+= Kh8 19.Bf5 N5f6 20.Rd1 Rd8 (20...Re8 21.Ne4+=) 21.Nc4+– Will e5 fall? 21...e4 22.Nfe5 Ne5 23.Be5 Rd1 24.Qd1 Qe7 25.Qa1 (25.h3 Ba8+–) 25...Bd5+= 26.Bf6 Qf6 (26...gf6 27.Qc3=) 27.Qf6 gf6 28.Nd2 Bb4 29.Be4 Bd2 30.Bd5 Kg7 31.g4 Bb4 32.Kg2 Bd6 33.f4 Bc5 34.Kf3 Kg6 35.Ke4 Kg7 36.Bc4 Ba3 37.h4 (37.Kd3 Kf8+=) 37...Bc5 38.h5 Bb4 39.Bd5 Bc5 40.Bb3 Bb4 41.Kf5 Bc5 42.Ke4 Bb4 43.Kd3 Bc5 44.e4 Kf8 45.Bc4 Bb4 46.Ke3 Kg7 47.Kd4 Bc5 48.Kd5 Kf8 49.Kc6 Ke7 50.Bb3 Be3 51.Ba2 Kf8 (51...Bf4 52.Kb6 Kd7 53.Bf7 Be3 54.Kb7+–) 52.Bd5 Kg7 (52...Bf4? 53.Kb6 Ke7 54.Ka6+–) 53.Ba2 Kf8 (53...Bf4?? 54.Kb6 Kf8 55.Kb7+–) 54.Bd5 Kg7 (54...Bf4? 55.Kb6 Ke7 56.Ka6+–) 55.Ba2 Kf8 (55...Bf4? 56.Kb6 Kf8 57.Kb7+–) 56.Bd5 Kg7 (worse 56...Bf4 57.Kb6 Ke7 58.Ka6+–) 57.Ba2 ½–½. DEFFM – GuestKHFP, freechess.org, 2019.

12.d4 Nbd7 13.Nbd2 Qc7 14.cd5 ed5 15.dc5 bc5 16.Qc2 Nb6 17.Be5+= Qd7 18.Ra1 Ra8 19.Bf6 (19.Ra8 Ba8 20.Qa2 Ne4+=) 19...gf6 20.Ra8 Ba8 21.Bd3 h6 22.Nf1 d4 (22...Qa7 23.Qb1+=) 23.ed4+– Bf3 24.dc5 Bg2 25.cb6 Bf3? (better 25...Bf1 26.Bf1 Bd8+–) 26.Be4+– Qg4?? (26...Bg4+–) 27.Ng3 h5 (27...Be4 28.Qe4 Qd1 29.Kg2 Bd6 30.Qe8 Bf8+–) 28.b7 Bd6 29.Qc8 Kg7 30.Bf3 Qf3 31.Nf5 Kg6 32.Nh4 (32.Nh4 Kg5 33.Nf3 Kf4 34.Qc4 Kf5 35.Qd5 Kg6 36.Qd6 Kh7 37.Qf6 Kg8 38.b8Q Kh7 39.Ng5) 1–0. DEFFM (2370) – Iferlan (2245), lichess.org, 2020.

12.cd5 Bd5 13.d3 Nbd7 14.Nbd2 Bf3 (14...Qc7 15.Qc2=) 15.Bf3 Nd5 16.Qb3 Nb4 17.Nc4 Bf6 18.d4 Qc7 19.Bb2 Nd5 20.Rc1 Rc8 21.g3 cd4 22.ed4 Bg5 (22...Qd8 23.Ne3 Ne7 24.Rc8 Nc8 25.Nc4=) 23.Rc2 (23.Ne3!? Qc1 24.Bc1 Rc1 25.Kg2+–) 23...Qb8 (23...Qd8 24.Nd6 Rc2 25.Qc2=) 24.Ba3+= N7f6 25.Bd6 Qa8 (25...Qa7!?+=) 26.Ra2+– Qb7 27.Be5 (27.Ra6 Ne8 28.Rb6 Qa7+–) 27...Rd8 (27...Qe7 28.Bg2+=) 28.h4 Bh6 29.Ra6 Nd7 (better 29...Qe7!?+–) 30.Nd6+– Qc7 31.Bd5 ed5 32.Qd5 Ne5 33.de5 g6 (33...Rf8 34.e6 Qd8 35.Ra7 fe6 36.Qe6 Kh8 37.Re7+–) 34.Ra8 (better 34.Rb6! Rd7 35.e6+–) 34...Ra8 35.Qa8 Bf8 36.Kg2 Qc5 37.f4 Qc2 38.Kh3 Qd1 39.Kh2 (39.Qe8 Qd5 40.Qc6+–) 39...Qd2 40.Qg2 Qd3 41.Ne4 Qb5 42.Qa2 (42.Nf6 Kg7 43.h5 gh5+–) 42...Be7 43.e6 (43.Nd6!? Bd6 44.ed6+=) 43...Qf5= 44.ef7 Qf7 45.Qa8 Kg7 46.Qc6 Qa2 47.Kh3 Qa1 48.Kg2 Qa2 49.Kf3 Qb3 50.Ke2 Qb2 51.Kd3 b5 52.Qc7 Qb1 53.Kd4 Qb2 54.Kd5 Qb3 55.Ke5 Qf7 56.Qb6 (56.Kd4 b4=) 56...b4=+ 57.g4 White prepares f5 (57.Kd4 b3=+) 57...b3 (57...h5 58.g5–/+) 58.f5 (58.h5 b2 59.f5 gh5 60.gh5 Bf6 61.Nf6 Qe7 62.Kd5 Qf6 63.h6 Kf7 64.Qb7 Ke8 65.Qb5 Ke7 66.Qb7 Kd8 67.Qa8 Kc7 68.Qa7 Kc8 69.Qa8 Kd7 70.Qb7 Ke8 71.Qb5 Kf8 72.Qb8 Ke7 73.Qb7 Ke8=) 58...b2 (better 58...Bh4!? 59.Nd2 Qe7 60.Qe6 Qc7 61.Kd4 Bf6 62.Ke4 Qc2 63.Kf3 Qd2 64.Qb3 h5 65.fg6 hg4 (65...Kg6 66.Qg8 Kh6 67.Qf8 Bg7 68.Qf4 Qf4 69.Kf4=) 66.Kg4 Qg5 (66...Kg6?! 67.Qg8 Bg7 68.Qe6 Kh7 69.Qe4 Kg8 70.Qe6 Kf8 71.Qf5 Ke8 72.Qe6 Kd8 73.Qg8 Ke7 74.Qg7 Ke6 75.Qg6 Kd7 76.Qf5 Kc6 77.Qc8 Kb6 78.Qb8 Kc5 79.Qc7 Kb5 80.Qe5 Kc6 81.Qe6 Kc5 82.Qe7 Kc4 83.Qf7 Kc3 84.Qe6=) 67.Kf3 Qh5 (67...Kg6?! 68.Qg8 Bg7 69.Qe6 Kh7 70.Qe4 Kg8 71.Qc4 Kh8 72.Qc8 Kh7 73.Qc2 Kh6 74.Qh2 Kg6 75.Qg3=) 68.Ke4 Qg6 69.Kf4 Bg5 70.Kg3 Bh6 71.Kf2 Qf5 72.Qf3 Bf4–+) 59.Kf4= Bh4 (59...Ba3!?=) 60.Qb2+= Bf6 61.Qb6 Qe7 62.Qa5 (62.Nf6 Qf6 63.Qf6 Kf6 64.g5 Kf7=) 62...Qd8 (62...gf5 63.Qf5 Qf7 64.Nd6=) 63.Qa7+= Qe7 64.Qb8 (64.Qe7 Be7 65.Ke5 h5=) 64...Qd8 (64...gf5 65.gf5 Bd4 66.Kf3=) 65.Qb7 Qe7 66.Qd5 Qc7 67.Kf3 Qe5 68.Qd7 Kg8 69.Qe6 (69.Nf6 Qf6 70.Kf4 h5=) 69...Kg7= 70.Qd7 Kg8 71.Ke3 (71.Qc6 Kg7+=) 71...gf5= 72.gf5 Qe7 (72...h5 73.Kf3=) 73.Kf3+= Qa3 (73...Qd7?? 74.Nf6 Kf7 75.Nd7+–) 74.Kg4 Qe7 75.Qc8 Kg7 76.Qc4 Qd8 77.Qc2 (77.Nf6 Qd1 78.Kf4 Qd2 79.Ke5 Qb2 80.Kd5 Kf6 81.Qh4 Kf5 82.Qh7 Kg5 83.Qg8 Kf4 84.Qf8 Kg4 85.Qc8 Kg5=) 77...Qe7 (77...h5 78.Kh5 Qh8 79.Kg4 Qh4 80.Kf3 Qh5 81.Ke3 Qh6 82.Kd3 Qh3 83.Kc4 Qf5 84.Qg2 Qg6 85.Qg6 Kg6 86.Kd5=) 78.Qg2 Kf8 79.Qh1 (79.Nf6 Qg7 80.Kh3 Qh6 81.Kg3 Qf6 82.Qa8 Kf7 83.Qd5 Kf8 84.Qc5 Qe7 85.Qc8 Kf7 86.Qc4 Kg7 87.Qg4 Kf8=) 79...Kg7 (79...h5 80.Kf3 Qa3 81.Kf4=) 80.Qb1 Qe5 81.Ng3 (81.Qb7 Kf8+=) 81...Qd4 82.Kh3 Qb2 (82...Qd5 83.Qe4 Qb3 84.Kg2=) 83.Qd3 (83.Qb2 Bb2 84.Nh5 Kf7=) 83...Qd4 (83...Be5 84.Qd7 Kf8 85.Qd8 Kf7 86.Qd5 Ke7 87.Kg4=) 84.Qb5 (84.Nh5 Kf7 85.Qb3 Kf8 86.Nf6 Qf6 87.Qb8 Kf7 88.Qc7 Kg8 89.Qc4 Kg7 90.Qg4 Kf7=) 84...Qe5 85.Qb7 Qe7 (85...Kg8 86.Kg4=) 86.Qc6 (86.Nh5 Kh6 87.Qe7 Be7=) 86...Qe3= 87.Kg4 Qd4 88.Kh3 Qe3 89.Qc7 Qe7 (89...Be7 90.Kg4=) 90.Qc1 (90.Nh5 Kf7 91.Qc4 Kf8 92.Nf6 Qf6 93.Qc5 Ke8 94.Qb5 Kf8 95.Qb8 Kf7 96.Qc7 Kg8 97.Qg3 Kf8=) 90...Qf7 91.Kg4 Qe7 92.Nh5 Kf8 93.Qc4 Qd6 94.Qc8 Kf7 95.Qb7 Qe7 96.Qd5 Kf8 97.Nf4 h5 (97...Qb4!?+=) 98.Kh5+– Qf7 (98...Qh7 99.Kg4 Qh4 100.Kf3 Qh1 101.Ke2 Qh2 102.Ng2 Qh5 103.Kd3 Qd1 104.Ke4 Qb1 105.Ke3+–) 99.Ng6 Kg7 100.Qa8 Bd8 101.Qc8 (101.Qd8?! Qf5 102.Qg5 Qg5 103.Kg5=) 101...Qf6 102.Qd7 Qf7 103.Qd4 (103.Qd8?! Qf5 104.Qg5 Qg5 105.Kg5=) 103...Qf6 104.Qg4 Kf7 105.Qf4 Kg8 106.Kg4 Qc6 107.Qg3 Qe4 108.Nf4 Kf8 109.Qc3 Kg8 (109...Kf7 110.Qb3 Kg7 111.Qf3+–) 110.Qc8 (110.f6 Kf7 111.Kg5 Ke8+–) 110...Qd4+– 111.Qe6 Kf8 112.Qh6 Kg8 113.Qe6 Kf8 114.Kf3 Qd1 115.Ne2 Qf1 116.Kg4 Qg2 (116...Be7 117.Qe3+–) 117.Ng3+– Qd2 118.Qe5 Qd1 119.Ne2 Qa4 120.Kf3 (120.Nd4 Qd1 121.Nf3 Be7+–) 120...Qb3 121.Kg2 (121.Nc3 Be7 122.Kf4 Qc4 123.Ne4 Qc1 124.Kf3 Qf1 125.Nf2 Qc4+–) 121...Qb7 122.Kf2 Bh4 123.Kf1 (123.Ke3 Bg5 124.Kd4 Qb4 125.Kd3 Qd2 126.Kc4 Qa2 127.Kb5 Qb3 128.Kc6 Qa4 129.Qb5 Qe4 130.Kb6 Bd8 131.Ka7 Qe7 132.Ka8 Qa3 133.Kb7 Qe7 134.Kc6 Qf6 135.Kd5 Qf5 136.Kc4 Qe6 137.Kd3 Qh3 138.Kd2 Qh6 139.Kc2 Qg6 140.Qd3 Qc6 141.Qc3 Qe4 142.Kd1 Qb1 143.Nc1 Be7=) 123...Qf3 124.Kg1 Bf2 125.Kh2 Be3 126.Ng3 (126.Qd6 Kf7 127.Qd7 Kf8 128.Qc8 Kg7 129.Qc3 Kg8 130.Qc4 Kf8 131.Qb5=) 126...Bf4= 127.Qf6 Ke8 128.Qg6 Kf8 ½–½. Drazic,Sinisa (2420) – Piotrowski,Przemyslaw (2185), 26th Cracovia Open A, 2015.

12.Ne5 Nbd7 13.Nc6 Bc6 14.bc6 Nb8 15.Qa4 (15.Bf6 Bf6 16.cd5 ed5–/+) 15...Qc7=+ 16.Bf3 Rd8 17.Nc3 Qc6 (17...Nc6 18.Nb5 Qb8 19.Rb1–/+) 18.Rb1=+ Qa4 19.Na4 Ne4 (worse 19...dc4 20.Nb6 Na6 21.Nc4+=) 20.Be4 de4 21.Rb6 Nd7 22.Rb7 Bf6 (better 22...Ra8!?=+) 23.Bf6= gf6 24.Kf1 Ne5 25.Nc5 Rd2 (25...f5!?+=) 26.Ne4+– Rc2 27.Nf6 Kg7 28.Nh5 Kg6 29.Nf4 Kf5 (29...Kf6!?+–) 30.Rb5+– Rc4 (better 30...Ke4 31.c5 Nc6+–) 31.f3 Rc2? (31...f6+–) 32.g4 (32.h4!? Rc1 33.Kf2 Rh1+–) 32...Kf6 33.Nh5 Ke7 (33...Kg6 34.Re5 Rh2 35.Nf4 Kf6 36.Rb5+–) 34.Re5 Rh2 35.Rb5 f5 (35...Ra2 36.Rb7 Kf8 37.g5+–) 36.Rb7 Kd6 37.Rh7 fg4 38.fg4 Rh4 (38...Ke5 39.g5 Rh1 40.Kf2 Rh2 41.Kf3 Rh3 42.Kg4+–) 39.g5 Rg4 (39...Rh1 40.Kf2 Rh2 41.Kf3 Rh3 42.Kg4 Re3+–) 40.Nf6 Ke5 (40...Rg5 41.Ne4 Ke5 42.Ng5+–) 41.Ng4 (41.Ng4 Kf5 42.Rh5+–) 1–0. DEFFM – GuestDLSV, freechess.org, 2018.

10.Ba1 Nbd7

11.0–0 b6 12.d3 Bb7=.

11.0–0 b6 12.d4 Bb7 13.Nbd2 Qc7 14.Qc2 Bd6 15.h3 (15.Bd3 dc4 16.Nc4 Bf3 17.Nd6 Bg2–/+) ½–½. Gadjily,Raouf (2265) – Allahverdiev,Anar, Baku Cup, 1995.

11.0–0 b6 12.d4 dc4 13.dc5 Nc5 14.Na3=.

11.0–0 b6 12.d4 Qc7 13.Ne5 (13.dc5 Bc5 14.cd5 Nd5=) 13...Qb7 (better 13...cd4!? 14.ed4 Bb7=+) 14.Nc6+= dc4?? (better 14...Bd6+=) 15.Ne7+– Kh8 16.Bc4 Qa7 (16...Qa8 17.Nc8 Qa1 18.Nd6+–) 17.Nd2 Bb7 18.Nc6 (18.dc5 bc5 19.Nf3 Qa8+–) 18...Bc6 (18...Qa8 19.Qf3 Rc8 20.d5 ed5 21.Bd5 Nd5 22.Qd5 Bc6 23.Qf7+–) 19.bc6 Nb8 20.Qf3 Qc7 (20...Qe7 21.Rb1 Qd8 22.Ne4 Ne4 23.Qe4+–) 21.Bb5 (better 21.dc5!? Nc6 22.Bf6 gf6 23.Qf6 Kg8 24.cb6 Qd8+–) 21...Nd5 22.dc5 bc5 23.Qg4 (23.Ne4 Nc6 24.Ng5 Kg8+–) 23...Qa5 (23...f5 24.Qa4 Rc8+–) 24.Qg7 1–0. GuestLJTQ – shimpanze, freechess.org, 2017.

11.0–0 Nb6 12.Qc2 dc4 13.Bc4 Nc4 14.Qc4 b6 15.Nc3 Bb7 16.Ne5 Nd5 (16...Qd2!? 17.Rd1 Qc2–/+) 17.Nd5 Bd5 18.Qe2 Bf6 19.Nc6 Bc6 20.bc6 Ba1 21.Ra1 Qc7 22.Qb5 Rc8 23.d4 (23.Ra6 Rb8= (23...Qc6?? 24.Qc6 Rf8 25.Rb6+–)) 23...cd4 24.ed4 Qc6?? (better 24...Rd8=) 25.Qc6+– Rc6 (25...Rf8+–) 26.Ra8 (26.Ra8 Rc8 27.Rc8) 1–0. GuestRSYN – GuestNZZD, freechess.org, 2017.

11.0–0 Nb6 12.d3 dc4 13.dc4 Qc7 14.Be5+– Bd6?? (better 14...Qd7+–) 15.Bd6+– Qd6 (15...Qd8 16.Bc5 Nbd7 17.Bf8 Qf8+–) 16.Qd6 (16.Qd6 Nbd7 17.Rd1+–) 1–0. Janek – Guest231, internet, 2018.

11.0–0 Nb6 12.d3 dc4 13.dc4 Qd1 14.Rd1 Rd8 15.Nbd2 h6 16.Be5 Rd7 17.h3 Ne8 18.Ra1 f6 19.Bc3 Nd6 20.Nh4 Kf7 21.Ba5 (21.e4 g5 22.Nhf3 e5+=) 21...Bd8 22.e4 g5 23.Nhf3 Ne8? (better 23...e5!?+=) 24.e5 f5 (24...h5 25.Bb6 Bb6 26.ef6 Kf6 27.Ne4 Ke7 28.Ne5+–) 25.Nb3 g4 (25...Bc7 26.Nc5 Rd8 27.Bc3+–) 26.hg4 (26.Nc5?! gf3 27.Nd7 Nd7 28.Bd8 fe2+=) 26...fg4 27.Nfd2 (27.Nc5 gf3 28.Nd7 Nd7 29.Bd8 fe2+–) 27...Bc7 28.Bg4 Rd8 29.Nc5 Nd7 (29...Be5 30.Re1 Nf6+–) 30.Ne6 Ba5 31.Nd8 Ke7 32.Nc6! bc6 33.Ra5 Ne5 (33...cb5 34.cb5 Nb6 35.Bc8 Nc8 36.Nc4+–) 34.Bc8 cb5 35.cb5 Nd6 (35...Kd8 36.b6 Kc8 37.Re5+–) 36.b6 Nc8 (36...Nc6 37.Ra8 Nb5+–) 37.b7 (37.b7 Nc6 38.bc8Q Na5 39.Qc5 Kf7 40.Qa5+–) 1–0. DEFFM – GuestQHQM, freechess.org, 2017.

11.0–0 Nb6 12.d3 Qc7 13.Qc2 Rd8 (13...Bd7 14.Nbd2=) 14.Nbd2 (14.Be5 Bd6 15.Bd6 Qd6=) 14...Bd6 15.Bf6 (15.Bb2 e5=) 15...gf6= 16.Ra1 Kh8 (16...Bd7 17.h4=) 17.Ra7 (17.Nb1 f5+=) 17...Rg8 18.Qc3 Be5 (better 18...e5!?=) 19.Ne5+– fe5 20.Nb3 d4 21.Qc1 1–0. DEFFM – GuestZQHS, freechess.org, 2018.

11.0–0 Nb6 12.d3 Bd7 13.Ne5 Qa8 (13...Qc7 14.f4=) 14.Nd2+= Qa4 (14...Rd8 15.Qc2+=) 15.Qa4 Na4 16.g4 h6 (16...Rd8 17.Ndf3+=) 17.f4 Be8 (17...Rd8 18.g5 Ne8 19.gh6 gh6 20.Kf2+–) 18.Bd1 (18.Bf3 Nb6+–) 18...Nb6+= 19.Kg2 (19.h4 Nfd7 20.h5 Bd6+=) 19...Nbd7 (19...Nfd7 20.Bc3+=) 20.Bf3+– Ne5 (20...Nb6 21.Bc3+–) 21.fe5+= Nd7 (better 21...Nh7!?+=) 22.cd5+– ed5 23.Bd5 Bg5? (better 23...Nb6 24.Bb7 Bb5+–) 24.Nc4 (24.Bb7?! Nb6+–) 24...b6 25.Nd6 Be3 (25...Kh7+–) 26.Ne8 Re8 27.Rf7 1–0. DEFFM – GuestQDRG, freechess.org, 2018.

11.0–0 dc4 12.Bc4 b6 13.d4 Bb7 14.Nbd2 Qc7 15.Qb3 Rc8 16.Be6 (16.Rc1 Bd6=) 16...fe6=+ 17.Qe6 Kf8 18.Ng5 Bd5 19.Nh7 Ke8 20.Qf5 cd4 21.Bd4 Qc2 22.Nf6 Nf6 (worse 22...Bf6 23.Qd5 Qd2 24.Qe6 Kd8 25.Bb6 Nb6 26.Qb6 Ke7 27.Qa7 Ke8 28.b6+–) 23.Qh3 Kf7 (23...Rd8 24.Nf3=+) 24.Nf3= (24.Bb6? Be6 25.Qh4 Qd2–+) 24...Bf3 25.Qf3 Qe4 26.Qh3 Rb8 27.Qg3 Rb7 28.Qg5 Rd7 29.Bb6 Rd5 30.Qg3 Bd6 31.f4 Rb5 32.Bd4 Bc5 33.Bc5 Rc5 34.Qh3 Rc3 35.Re1 Nd5 The pressure on e3 grows 36.Qh5 (36.Qd7 Kg6 37.Qg4 Kf6 38.Qh4 Kf7 39.Qh5 Kg8–/+) 36...Kg8 37.Qh4? (better 37.Qe5!? Qe5 38.fe5 Re3 39.Re3 Ne3 40.Kf2–+) 37...Rc1!–+ (37...Re3?! 38.Rd1 Nf6 39.h3–/+; worse 37...Ne3 38.Qd8 Kf7 39.Qd7 Kg6 40.Qd2–+) 38.Qd8 (38.Rc1 Qe3 Double attack (38...Qe3 Decoy)) 38...Kf7 39.Qd7 Ne7 (39...Ne7 40.Rc1 Qe3 41.Kf1 Qc1 42.Ke2 Qf4–+) 0–1. DEFFM – GuestWXVW, freechess.org, 2018.

11.0–0 dc4 12.Bc4 Nb6 13.d3=.

11.0–0 Qc7 12.Qb3 b6 13.d4 Bb7 14.Nbd2 Ra8 15.Bb2 cd4 16.Bd4 dc4 (16...e5!? 17.Bc3 Bd6=+) 17.Qc4= Qc4 (17...Bc5 18.Rd1=) 18.Nc4 Nd5 (18...Ra2 19.Bd3=) 19.Ra1 (19.Nfe5 Ne5 20.Be5 Bc5=) 19...Ra1 20.Ba1 Bf6 (20...f6 21.Nd4 Nc7 22.Nc6=) 21.Nfe5 (21.Bf6 N5f6 22.Nd6 Bd5+=) 21...Ne5= 22.Ne5 (22.Be5 Be5 23.Ne5 Nc3=) 22...Ne7 (22...Nb4 23.Bb2=) 23.Bd4 (23.Bh5 Be5 24.Be5 Nc8+=) 23...Nf5= 24.Bb2 Ne7 (24...h6 25.g4 Nh4 26.f4=) 25.f4 (25.Bh5 Ng6 26.Bg6 hg6+=) 25...Ng6 26.Nc4 Bd5 (26...Bb2 27.Nb2 e5 28.Bh5+=) 27.Bc1 (27.Bf6 Bc4 28.Bc4 gf6+–) 27...Bc4 (27...Be7 28.Nb6 Nf4 29.Nd5 Ne2 30.Kf2 ed5 31.Ke2+–) 28.Bc4+= Be7 (28...Kf8 29.Kf2+=) 29.Kf1 Bc5 30.Ke2 Kf8 31.Bb2 (31.g4 e5+=) 31...h5 (31...Nh4 32.g4+=) 32.g3+– Ne7 33.e4 Ng8 34.Kf3 Nf6 (34...Ne7 35.Be2+–) 35.h3 (35.Bf6 gf6 36.h4 Kg7+–) 35...Ke7 36.g4 hg4 37.hg4 Ne8 38.Bd3 f6 (38...Nf6 39.g5 Ne8 40.Kg4+–) 39.e5 fe5 40.Be5 Kf7 41.Bb2 (41.Bc3 Nf6+–) 41...Nd6 42.Kg3 Nc8 43.Kh4 (43.f5 ef5 44.gf5 Be7+–) 43...Be7 (43...Bd6 44.f5 e5 45.g5+–) 44.Kh5 (44.g5 g6+–) 44...Bc5 (44...Bf6 45.Ba3+=) 45.Bg6 Kf8 46.Bc2 (46.g5 Ne7+–) 46...Nd6 (46...Ne7 47.Be5+–) 47.Kg6 Ne8 (47...Nb5 48.Bg7 Ke7 49.Bf6 Kf8 50.g5+–) 48.Bb3 Ke7 49.g5 (49.f5 ef5 50.gf5 Kf8+–) 49...Be3 (49...Bd6!?+–) 50.Be5+– Bc5 51.Kh7 (51.Bg7 Ng7 52.Kg7 Be3+–) 51...Be3 (51...Bd6 52.Kg8+–) 52.Kg8 (52.Bd1 Nd6+–) 52...Bd2 53.Bc2 Be3 54.Bg6 Nd6 55.Bg7 (55.Kg7!? Nc4 56.Bf6 Kd7+–) 55...Bf4+– 56.Bf6 Kd7 57.Bd3 e5 (better 57...Ne8+–) 58.Be2?? (better 58.g6+–) 58...Ne4=+ Attacks the isolani on g5 59.Bg4 (59.Kf7 Ng5 60.Bg5 Bg5=+) 59...Kd6–/+ 60.Bd8 (better 60.Bf3!? Ng5 61.Bg5 Bg5 62.Kf7=+) 60...Bg5–+ (60...Ng5?! 61.Bb6 Ne4 62.Bd8=) 61.Bf3 Nc3?? (better 61...Nd2 62.Bg5 Nf3–+) 62.Bg5+– Nb5 63.Bd2 (63.Kf7 Nd4 64.Be4 Nc6+–) 63...Nd4 (63...Ke6 64.Kg7+=) 64.Be4 Kc5 (64...Nb3 65.Bh6+=) 65.Kf7+– b5? (better 65...Kd6!?+–) 66.Kf6+– Nc6 Black prepares the advance b4 (66...b4+–) 67.Be3 (better 67.Ke6!? b4 68.Be3 Kb5 69.Kd5+–) 67...Kd6+– 68.Kf5 (68.Bh6!?+–) 68...b4 (68...Ne7 69.Kg4+=) 69.Kg4 (69.Bh1 Na5+=) 69...b3 (69...Ne7 70.Kf3+=) 70.Bc1 Nd4 71.Ba3 (better 71.Bb2+=) 71...Kc7? (71...Ke6 72.Bb2 Nb5 73.Kf3+=) 72.Kg3 (better 72.Kg5!?+–) 72...Kb6 (72...Ne2 73.Kg2+=) 73.Kf2+– Kb5? (73...Kc7 74.Bb2+–) 74.Bd3 (74.Bd6!? Nc6+–) 74...Ka4 (74...Kc6 75.Bb2 Kd5 76.Bh7+–) 75.Bb2 (75.Bd6 Nc6 76.Be4 Na5+=) 75...Kb4 76.Ke3 Kc5 (76...Nc2!? 77.Ke4 Na3+=) 77.Ke4+– Nc6 (77...Kb4 78.Ke5 Nb5 79.Bf5+–) 78.Be2 (78.Ba3 Kb6+–) 78...Kd6 (78...Kb4 79.Kd5 Nd4 80.Bd3+–) 79.Bd1 (79.Ba3 Ke6+–) 79...Nd4 80.Kd3 (better 80.Bg4!?+–) 80...Ke6+– 81.Kc4 (81.Bg4 Kd5+–) 81...Kf5+= 82.Bd4 (82.Bh5!?+=) 82...ed4= 83.Kd4 b2 ½–½. Fernandez,Daniel Howard (2470) – Arkell,Keith C (2435), PRO League Central, 2017.

11.0–0 Qc7 12.Nc3 Rd8 (12...Bd6 13.Qc2=) 13.Na4 (13.cd5 ed5 14.Bb2 c4=) 13...b6 (13...e5 14.Nh4+=) 14.Qc2 (14.cd5 Nd5 15.d4+=) 14...e5 (14...dc4!? 15.Qc4 Bb7+=) 15.cd5= Nd5 16.d4 (16.Bc4 Bb7=) 16...Nb4 17.Qc3 Qa7 (17...ed4 18.ed4 Nd5 19.Qb3=) 18.Qb3 e4 (18...ed4 19.ed4 Bb7 20.dc5 Nc5 21.Nc5 bc5 22.Bc4+=) 19.Nd2+= Nf6 (19...Bb7 20.Bc4+=) 20.Bc4+/– Bf8 21.Bc3 (21.f3 ef3 22.Nf3 Bf5 23.dc5 bc5 24.Bf6 gf6+/–) 21...Bf5 22.Ra1 (22.Bb4 cb4 23.f3 ef3 24.Nf3 Rd6+/–) 22...Qb7 (22...Qc7 23.dc5 bc5 24.b6=) 23.Nf1 (23.dc5!? bc5 24.Nc5 Bc5 25.Bb4 Bb4 26.Qb4+/–) 23...Nbd5= 24.Bb2 (24.dc5 bc5 25.Bb2 Rd7+=) 24...h6 (24...cd4 25.Ng3 Bg6 26.Bd4+=) 25.Rd1 (25.dc5 bc5 26.Rd1+/–) 25...Nb4? (better is 25...cd4!? 26.Ng3 Bg6 27.Rd4 Rd7+=) 26.dc5+/– Rd1 27.Qd1 bc5 28.Qd8 (28.Bf6!? gf6 29.Qh5+/–) 28...Nd7+= 29.Nd2 Qa7 30.Nc3 (30.Qe8 Bg6 31.Nc3 Nb6+=) 30...Nb6 31.Bf7?? (better is 31.Be2 Nd3 32.Bd3 ed3 33.e4=) 31...Kf7–+ 32.Nce4 (32.Nde4 Be4 33.Ne4 Qa2–+) 32...Be4 33.Ne4 Qd7 (better is 33...Qa2!? 34.Ng3 Qb1 35.Nf1 N4d5–+) 34.Qd7–/+ Nd7 35.Kf1 Ke6 36.Nc3 (36.Ke2 Kd5 37.Nd2 c4–/+) 36...Nb6 (36...Nd3 37.Ba3–/+) 37.Ke2 g5 (37...g6 38.h4–/+) 38.Ne4 (38.f4 Nc4 39.Bc1 Bg7–/+) 38...Kd5 39.f3 (39.Nd2!?–/+) 39...Kc4–+ 40.Be5 Kb5 41.Nd6 (41.Bd6 Bd6 42.Nd6 Ka4–+) 41...Ka4 (41...Bd6 42.Bd6 c4 43.Be5–+) 42.Ne4 (42.Nf5 c4–+) 42...c4 43.Kd2 (43.f4 gf4 44.ef4 Nd3–+) 43...Kb3 44.Nc3 (44.h4 gh4 45.Kd1 Nc6 46.Nd2 Kb4–+) 44...N6d5 (44...Nc6!? 45.Bh8 Bb4 46.Bg7–+) 45.Nd5 (45.Ne2 Nd3 46.Nd4 Kb2–+) 45...Nd5 46.e4 (46.g3 Bb4 47.Ke2 Bc3–+) 46...c3 (46...Bb4 47.Ke2 c3 48.Bc3 Nf4 49.Kd1 Bc3 50.g3–+) 47.Kc1 (47.Bc3 Nc3 48.Kd3–+) 47...Ba3 0–1. Nielsen,Joergen Axel – Flarup, Denmark, 1973.

11.d3 b6 12.0–0 Bb7 13.Nbd2 Qc7 14.Bb2 Ra8 15.Qb3 Ng4 16.h3 Ngf6 17.d4 (17.cd5 Nd5 18.Ra1 Ra1 19.Ba1 e5=) 17...cd4=+ 18.ed4 Bd6 19.Rc1 dc4 20.Bc4 (20.Nc4 Bf4 21.Ne3 Qd6=+) 20...Qb8 21.Bd3 (21.Rc2 Bf4=+) 21...Bf4 22.Re1 (22.Rc2 Bd5 23.Qc3 h6=+) 22...Ra7 (22...Bd5 23.Bc4=+) 23.Bc4 (23.Qc2 Ra2=+) 23...Qa8 (23...Qc7 24.g3 Bh6 25.Bc1=+) 24.g3 Bh6 25.h4 (25.Qd3 Bd5=+) 25...Nf8 (25...Qd8 26.Bc1–/+) 26.Ng5 Bd5 27.Qd3 (27.f4 Ra5–/+) 27...Ng6 (27...Ra5 28.f4–/+) 28.Rc1 (28.f4 Rc7–/+) 28...Qd8 (28...Qe8 29.f4=+) 29.Ndf3 (29.f4 Ne7=+) 29...Ra4 (29...Bc4 30.Qc4 Ne7 31.Ne5 Bg5 32.hg5–/+) 30.Bd5 (30.Ne5 Bg5 31.hg5 Bc4 32.Rc4 Rc4 33.Qc4 Nd5=+) 30...Nd5–/+ (30...Qd5? 31.Qg6 Qd7 32.Qc2 Qb5 33.d5 Bg5 34.Qb3+– (worse 34.Ng5 e5 35.Qc8 Qe8 36.Qe8 Ne8+–)) 31.Rc6 Bg5 (31...Ra2 32.Qc4 Ra8 33.Ne4=+) 32.Ng5 Nf8 (32...Ra2 33.Qb3 Ra7 34.Qf3–/+) 33.Ba3=+ h6 34.Nf3 (34.Ne4 Nd7=+) 34...Nd7 35.Qb3 Ra8 36.Kg2 (36.Ne5 N7f6=+) 36...N7f6 37.Ne5 Nc7 (37...Ra7 38.Qc4 Rc7 39.Qe2=+) 38.Rd6 (38.Bd6 Nce8 39.Nc4 Nd5=+ (worse 39...Nd6 40.Rd6 Qe7 41.Nb6+=)) 38...Qf8 39.Bb4 Qb8 (39...Qe8 40.Rc6 Ncd5 41.Bd6=) 40.Qd3 (40.Qf3 A) 40...Nb5? 41.Rb6 Qb6 42.Qa8 Kh7 43.Bc5+– (43.Nf7?! Qd4 44.Be7 Ne4=+); B) 40...Qe8 41.Rb6 Ncd5=) 40...Ncd5 41.Ba3 Qb7 42.Rc6 Nc7 (42...Ra5 43.Bd6=+) 43.Bd6= Nce8 44.Ba3 Ra4 (44...Nd5 45.Nc4=+) 45.Nc4 Attacks the isolani on b6 45...Qa8 46.Kg1 (46.Qf3 Nd5=+) 46...Nd5 47.Qb3 (47.h5 Qd8=+) 47...Ra7 48.Qd3 Qb7 49.Kg2 Ra4 (49...Nec7 50.Qb3=+) 50.Qb3 Qa8 51.Kf1 (51.Kg1 Kh8=) 51...Ra7=+ 52.Kg1 Qd8 53.Qd3 Ra4 54.Kg2 Qa8 (54...Nef6 55.Bd6=+) 55.Kf1 (55.Kg1 Nec7=+) 55...Nec7 (55...Kh8 56.Qf3 Ra7 57.Bd6=+) 56.Qb3 Nb5 57.Qb5 Nc3 (worse 57...Ra3 58.Na3 Qa3 59.Rc8 Kh7 60.Kg2+=) 58.Nb6 Nb5 59.Na8 Ra3 (59...Na3?! 60.Rc8 Kh7 61.d5=) 60.Rc8 Kh7 61.Nb6 Nd4 0–1. DEFFM – GuestKZCN, freechess.org, 2018.

11.d3 Nb6 12.0–0 Qc7 13.Nbd2 Rd8 14.Qc2 Ne8 15.Rc1 Nd7 16.d4 b6 17.cd5 ed5 18.Bb2 c4 (18...Nef6!?+=) 19.e4+– Nd6 20.ed5 Nf6 21.Nc4 Bf5 (21...Nd5 22.Ne3 Qc2 23.Rc2+–) 22.Qb3 Nc4 23.Bc4 Qd6 24.Ne5 Ne4? (24...Ra8 25.Re1+–) 25.Rc2 (25.Nf7 Kf7 26.Ba3 Nd2 27.Bd6 Nb3 28.Be7 Rc8 29.d6 Ke8=) 25...Qh6? (better 25...Nf6 26.Re2 Ra8+–) 26.Nf7! Kf7 27.d6 Be6 (27...Kf6 28.de7 Ke7 29.Re2+–) 28.de7 Ke7 29.Ba3 Kf7 (29...Rd6 30.Re2 Bf5+–) 30.Be6 Qe6 31.Rc7 Kf6 32.Be7 Qe7 33.Qf3 (33.Qf3 Kg6 34.Re7+–) 1–0. DEFFM – ffcs, freechess.org, 2018.

11.d3 dc4 12.dc4 Ne4 (12...Qc7 13.Qc2=) 13.0–0 (13.Bd3 Qa5 14.Nbd2 Nd2 15.Nd2 Bf6 16.Bf6 Nf6=) 13...Qa5 14.Nbd2 Ndf6 (14...Nc3!? 15.Nb3 Qb4 (15...Nd1? 16.Na5 Ne3 17.fe3+–; 15...Ne2?! 16.Qe2 Qc7 17.Bc3=) 16.Bc3 Qc3=) 15.Ne4+= Ne4 16.Qc2 Bf6 (16...f5 17.Bd3 Bf6 18.Bb2+= (18.Be4?! Ba1 19.Bd3 Rd8=+)) 17.Bf6 (17.Ne5 Qd2 18.Qd2 Nd2+=) 17...Nf6 18.Rd1 (18.e4 Nh5+–) 18...b6 (18...Qc7 19.Qd3+=) 19.Ne5+– Qa7 (19...Bb7 20.Nc6 Qa3 21.Bf3+–) 20.Bf3 (20.Qd3 Bb7 21.Nc6 Qa8+–) 20...Bb7 (20...Qc7 21.Nc6+–) 21.Bb7 (21.Nc6 Bc6 22.bc6 Qc7+–) 21...Qb7 22.Nf3 (22.Nc6!?+–) 22...Ra8= 23.Qd2 (23.Qd3 g6+=) 23...h6 24.Qc2 (24.Ne5 Qe4 25.Qd6 Ra2=) 24...Qe4 25.Qd2?? (better 25.Qc3=) 25...Qc4–+ 26.Rb1 (26.Ne5 Qb5 27.Qc2 Nd5–+) 26...Qd5 (26...Nd5 27.h3–+) 27.Qd5 (27.h3 Ra2 28.Rb2 Rb2 29.Qb2 Ne4–+) 27...Nd5 (27...ed5 28.Ne5–+) 28.g3 f6 29.Nd2 Nc3 (29...Ra4 30.Kf1–+) 30.Rb3 Nd5 (better 30...Ra1!? 31.Kg2 Rc1–+) 31.e4 (31.Rb1 Ra4 32.Kg2–+) 31...Ne7 32.Nc4 Nc8 33.Ra3? (better 33.Rd3!?–/+) 33...Ra3–+ 34.Na3 Nd6 35.f3 Kf7 36.Kf2 e5 37.Ke3 (37.Ke2 Kg6–+) 37...Ke6 (37...f5 38.g4 fg4 39.fg4–+) 38.Kd3 f5 39.ef5 (39.g4 g6–+) 39...Kf5 40.Ke3? (better 40.Nc2–+) 40...Ke6 41.Kd3 (41.f4 ef4 42.Kf4 Kd5–+) 41...Kd5 42.Ke3 (42.Kc3–+) 42...Nc4 43.Nc4 (43.Kd3 Na3 44.Ke2 Nb5–+) 43…Kc4 0–1. valpa – michbarc, playchess.de, 2002.

11.d3 Qc7 12.0–0 Nb6 13.Nbd2 Bd7 14.Bb2 (14.Qc2 Ra8=) 14...h6 (14...Ra8 15.Qc2=) 15.Qb3+= Ra8 16.Ne5 Bd6 (16...Bc8 17.Ra1=) 17.f4 Na4 (17...dc4!? 18.dc4 Bc8+=) 18.Ra1+– (18.Nd7?! Nd7 19.Ra1 Ndb6=) 18...Qa5 (18...dc4 19.Nec4 Nb6 20.Ra8 (worse 20.Nd6 Ra1 21.Ba1 Qd6+–) 20...Na8 21.Qa3+–) 19.Bc3 Qc3? (better 19...Nc3!? 20.Ra5 Ne2 21.Kf1 Ra5 22.Ke2 Be8+–) 20.Qc3+– (20.Ra4?! Qd2 21.Ra8 Kh7=) 20...Nc3 21.Ra8 Kh7 (21...Be8 22.Bf3+–) 22.Bf3 g5 (22...Be8 23.Ra7 b6 24.Nf7 Bf7 25.Rf7+–) 23.Nf7 (23.Nf7 Bc7 24.fg5 hg5 25.Ng5 Kg6 26.Nh3+–) 1–0. GuestWMQY – GuestWHVC, freechess.org, 2018.

8.a4 b6

9.0–0 a5 10.d4 Bb7 11.Ne5 Nbd7 12.Nc6 (12.f4 Qc7=) 12...Bc6 13.bc6 Nb8 14.c7 Qc7 15.Nc3 Qd7 (15...Rd8 16.Nb5 Qd7 17.Qb3=+) 16.Nb5 (16.cd5!? ed5 17.Bf3=) 16...Nc6 17.Bf3 (17.Qb3 Ne4 18.Rfd1 Nb4=) 17...Rfd8 (17...cd4 18.cd5 ed5 19.Bd4 Nd4 20.Qd4=+) 18.Qe2 Nb4 19.Rfd1 (19.g3 Qc6=+) 19...Qc6 20.g3 Rd7 (20...Ne4 21.Bg2=+) 21.Bg2 (21.Rac1 g6=+) 21...Rad8 22.cd5 ed5 23.Bh3 (23.f3 Qe6=+) 23...Rb7–/+ Black prepares the advance c4 24.f3 c4 (24...Bf8 25.Rdc1–/+) 25.Rdc1 (25.Rac1 Re8=+) 25...h6 (25...h5 26.Ra3 Na6 27.Rac3–/+) 26.Rc3=+ Bf8 27.e4 de4 28.Bg2 (28.fe4 Qe4 29.Qe4 Ne4 30.Rc4 g6=+) 28...Nd3 (28...e3 29.Rc4 Qe6 30.Rac1–/+) 29.fe4=+ Nb2 30.e5 Nd5 31.Qb2 Bb4 32.Rf3 c3 33.Qa2 (33.Qc2 Re7=+) 33...Qe6–/+ 34.Rf2 Rbd7 35.Bd5 (35.Rc1 Ne3–/+) 35...Qd5 36.Qe2 Rc8 37.Qc2 Rc4 38.Rd1 (38.Re1 Qc6 39.Qd3 Qe6–/+) 38...Bc5! 39.Nc3 (39.dc5 Qd1 Double attack (39...Qd1 Pinning; 39...Qd1 Deflection; 39...Qd1 Decoy)) 39...Bd4?? (39...Rc3 40.Qc3 Bd4 41.Qc8 Rd8 42.Rd4 Qd4–/+ (42...Rc8?? 43.Rd5 Re8 44.Rc2+–)) 40.Nd5+– Rc2 41.Rd4 Rf2 42.Kf2 Kf8 (42...Rb7+–) 43.Rd2 1–0. GuestZYMW – DrBelzmerde, freechess.org, 2020.

9.0–0 Bb7 10.d4 ab5 11.ab5 Nbd7 12.Nbd2 Qc7 13.Qb3 (13.Ba3 dc4 14.Bc4 Bd6=) 13...dc4 (13...cd4 14.Nd4 Rfc8 15.Ra8 Ra8 16.Rc1=+) 14.Bc4= cd4 15.Ra8 Ra8 16.Bd4 Nc5 (16...Bd6 17.Rd1=) 17.Qc2 h6 18.Ne5 Bd6 19.f4 Nce4 20.Ne4 (20.Rc1 Rc8=) 20...Be4 21.Qe2 Bc5 22.Bb2 (22.Rc1 Bd4 23.ed4 Qd6=) 22...Rd8 (22...Nd5 23.Bd5 Bd5 24.Rc1=+) 23.g4 (23.Bd3 Bd3 24.Nd3 Ne4=) 23...Bb4 (23...Qd6 24.g5 Nd5 25.Bd5 Qd5 26.Re1–/+) 24.Bd4= Ne8 (better 24...Nd7!?=) 25.f5+= Bd5 26.fe6 Be6? (better 26...fe6 27.g5 Qe7+–) 27.Be6+– fe6 28.Nc6 e5? (28...Ba5+–) 29.Qc4 (29.Nb4?! ed4 30.Nc6 Ra8+–) 29...Kh8 30.Be5 (30.Be5 Bd6 31.Rf8 Bf8 32.Bc7 Rd1 33.Kf2 Nc7 34.Ne5+–; worse 30.Qb4 ed4 31.Rf8 Kh7+–) 1–0. Osmak,Yulia – Migovich,Alexandr, Kiev Independence Cup–B 9th, 2009.

9.0–0 Bb7 10.d4 Qc7 11.Nbd2 (11.cd5 Nd5 12.Nc3 Nc3 13.Bc3 Rd8=) 11...Rd8 12.Ne5 (12.cd5 Nd5 13.Qc2 Nd7=) 12...Bd6 (12...ab5 13.ab5 Ra1 14.Qa1=) 13.Qb3 a5 (13...Nbd7 14.f4=) 14.f4 Nbd7 15.Rad1 Rac8 16.Rc1 Qb8 17.Ba3 cd4 (17...Ne5 18.fe5 dc4 19.Nc4+–) 18.ed4 dc4 (18...Ne4 19.Ne4 Ba3 20.Qa3 de4 21.Qe3+=) 19.Ndc4+= Ba3 20.Qa3 Bd5 21.Qe3 (21.Ne3 Qb7 22.Nc6 Bc6 23.bc6 (worse 23.Rc6 Rc6 24.Bf3 Nb8=+) 23...Rc6 24.Bf3+–) 21...Qb7?? (better 21...Rc7=) 22.Nf7!+– Bc4 (22...Kf7 23.Nd6 Double attack) 23.Nd8 Rd8 24.Bc4 Nf8 (24...Kh8 25.Be6 Nd5 26.Bd5 Qd5 27.Rc6+–) 25.Be6 (25.f5 Re8+–) 25...Ne6 26.Qe6 Kh8 (26...Kf8 27.f5+–) 27.Rc6 Nd5 (27...Re8 28.Qd6 h6 29.Rb6+–) 28.f5 h6 (28...Qe7 29.Rb6 h5 30.Qe7 Ne7+–) 29.f6! gf6 (29...Nf6 30.Rb6 Deflection; 29...gf6 30.Rf6 Decoy) 30.Rf6 Nf6 31.Qf6 Qg7 32.Qd8 (32.Qd8 Kh7 33.Qh4 Kh8 34.Rc8 Kh7 35.Qe4 Qg6 36.Rc7 Kh8 37.Qg6 h5 38.Qg7) 1–0. DEFFM – GuestJCTY, freechess.org, 2019.

9.0–0 Bb7 10.d4 cd4 11.Qd4 dc4 12.Nbd2 Bc5 13.Qc4 Nbd7 14.Qh4 (< 14.ba6 Ba6 (< 14...Ra6 15.Nb3+=) 15.Qa6 Ra6 16.Ba6 Qe7=+) 14...ab5 15.Bb5 Ne8 16.Qf4 Bd6 17.Qd4 e5 18.Qg4 Nef6 19.Qf5 Qe7 20.Rfd1 Rfd8 (20...Bd5 21.Nc4 Bc4 22.Bc4+=) 21.Nc4 Bf3 22.Rd6 Be2 23.Rc6 Bc4 24.Bc4 Rac8 25.Ba3 Qe8 26.Rc8 Rc8 27.Bb5 g6 28.Qd3 (28.Qh3 Rc3+/–) 28...Qe6+= 29.Qd6 Nc5 30.Bc5 Rc5 31.Qe6 fe6 32.Rb1 Nd5 33.Ba6 e4 34.h3 Kg7 35.Bb7 Rc4 36.Bd5 ed5 37.Rb6 Ra4 38.Rb7 Kg8 39.Rd7 Ra5 40.g4 (40.Kh2 h6+=) 40...g5= 41.Kg2 h6 42.Kg3 Rb5 43.h4 Kf8 44.Rd6 Kg7 45.h5 Ra5 46.Rd7 Kg8 47.Rd8 (47.f4 ef3 48.Kf3 Rb5+=) 47...Kg7 (47...Kf7 48.f4=) 48.Rd6 Rc5 49.f4 ½–½. Markus,Roland – Malmstroem,Jan, TKM/SF/02, 2001.

9.0–0 dc4 10.Bc4 ab5 11.Bb5 Bb7=.

9.d3 dc4 10.dc4!? Qd1 11.Bd1=+.

9.d3 dc4 10.d4 cd4–+ 11.ed4 (11.Qd4 ab5 12.ab5 Bb4 13.Kf1 Qd4 14.Bd4 Ra1 15.Ba1 Bb7=) 11...Qc7 (11...ab5 12.ab5 Ra1 13.Ba1 Bb4 14.Bc3 Bc3 15.Nc3–/+) 12.0–0 ab5 13.ab5 Ra1 14.Ba1 Bb7 15.Qa4 Bd5 16.Rc1 Nbd7 17.Nbd2 Qf4 18.Bc3 Ne8 (18...Ra8 19.Qc2 Ba3 20.Ra1–/+) 19.Ne5 (19.Bc4 Bf3 20.gf3 Bd6–+) 19...Qg5 (19...Ne5 20.de5 Bc5 21.Rf1–/+) 20.Nef3 Qh6 (20...Bf3 21.Bf3 Nd6–/+) 21.Rb1 (21.Ra1 Nd6 22.Bb4 Rc8–/+) 21...Nef6 (21...Qg6!?–/+) 22.Qc2 (better is 22.Ra1!?+=) 22...Qg6 (better is 22...Rc8!?–+) ½–½. Jakubaszek,A – Tomtalski,Z, corr Poland–ch, 1989.

8.a4 dc4

9.Na3 ab5 10.ab5 b6 11.Nc4 Bb7 12.Ra8 Ba8 13.Qa1 (13.0–0 Nbd7+=) 13...Nbd7 14.0–0 Bd5 15.Qa7 (15.d3 Qc7=) 15...Qa8 16.Ra1 Qa7 17.Ra7 Ra8 18.Ra8 Ba8 19.Nfe5 Bd8 (19...Kf8 20.d4+=) 20.Bf3 (20.Nc6 Bc7+=) 20...Bf3 21.gf3 Ne5 22.Be5 Ne8 23.Kf1 (23.d3 Nc7 24.Bc7 Bc7=) 23...Bc7 (23...f6 24.Bb8 Nc7 25.Nb6 Nb5 26.Nc4=) 24.Bc7 (24.d4 Be5 25.de5 Nc7+=) 24...Nc7= 25.Nb6 Nb5 26.Ke2 f6 27.Kd3 Nd6 28.e4 (28.Nd7 c4 29.Kd4 Kf7+=) 28...Kf7 29.Na4 Nb7 30.Kc4 Na5 31.Kc3 Nb7 32.Kc4 Kg6 (better is 32...Na5!? 33.Kc3 Nb7=) 33.Nc5+/– Nd6 34.Kd3 e5 35.Ke3 Nc4 36.Kd3 (36.Ke2 Kf7+/–) 36...Nd6 37.f4 ef4 38.Ne6 Nf7 (better is 38...f3!?+/–) 39.Nf4+– Kg5 40.Ke3 (40.Ne6 Kg6+–) 40...Ne5 41.Ne6 Kh4 (41...Kg6 42.f3+–) 42.Ng7 Ng4 (42...Nc4 43.Ke2+–) 43.Ke2 (43.Kf3 Kh3+–) 43...Nh2 (43...Kh3 44.d4+–) 44.f3 Kg3 45.Nh5 Kg2 46.Nf6 h6 (46...Nf3 47.Ke3+–) 47.Ng4 (better is 47.f4 Nf3 48.Ke3 Nh4+–) 47...Nf3 48.Nh6 Kg3 49.Ke3 Ne1 (49...Ne5 50.d3+–) 50.Nf5 (better is 50.e5!? Ng2 51.Ke4 Nf4+–) 50...Kg4 51.d4 (51.Nd6 Nc2 52.Kd3 Ne1 53.Kc4 Kg5+–) 51...Ng2 52.Kd3 (52.Kf2 Nf4 53.Ne7 Nd3 54.Ke3 Nc1+–) 52...Kf4 (52...Kg5 53.Nd6+–) 53.Nd6 Ne3 54.Nc4 (54.e5!? Nd5+–) 54...Ng4 55.Nd6?? (55.Nd2 Kg5+–) 55...Ne3 56.e5 Ng4 (56...Nd5+–) 57.e6 Nf6 58.e7 1–0. Bennett,Hilton Petrie – Hawkes,Peter D (2195), NZL–ch105 Hamilton, 1998.

9.Na3 ab5 10.ab5 c3 11.Bc3 Nd5+=.

9.Na3 ab5 10.ab5 Qe8 11.0–0=.

9.Na3 b6 10.Nc4 Bb7 (10...Bd7 11.a5 ba5 12.b6=) 11.0–0 ab5 (11...Nbd7 12.d4=) 12.ab5 Ra1 13.Qa1 Nbd7 14.Bc3 (14.Rd1 Bd5=) 14...Qc7 15.Nfe5 Ra8 (15...Rd8 16.Nd7 Rd7 17.Qa7=) 16.Qb2 Bf8 (16...Ne5 17.Be5 Qd8 18.d4=) 17.Ra1 (17.Ra1 Ra1 18.Qa1+=). Bennett,Hilton Paul – Dunn,Alan S, corr NZCCA TT res, 1998.

9.Na3 c3 10.dc3 Bd7 11.Qc2=.

9.Bc4 Nd5 10.0–0 (10.Nc3 Bf6+=) 10...Bf6 (10...ab5 11.ab5 Ra1 12.Ba1=) 11.d4 (11.Nc3 b6+=) 11...ab5 (11...cd4 12.Nd4 ab5 13.ab5 Ra1 14.Ba1=) 12.ab5+= Ra1 13.Ba1 Qa5 (13...Nd7 14.Nbd2+=) 14.Bb2 (14.Nbd2!? Bd7 15.Qe2 cd4 16.Bd4 Bd4 17.Nd4+–) 14...Bd7= The isolani on b5 becomes a target 15.Qb3 Rc8 16.e4 (16.Nbd2 Qb4=) 16...Nb6 17.Nbd2 (17.Bc3 Qa4 18.Na3 Be7–/+) 17...Nc4=+ 18.Nc4 Qb5 19.Qb5 Bb5 20.Nd6 Bf1 21.Nc8 Ba6 22.e5 Bd8 23.dc5 Nd7 24.Bd4 Ba5 25.c6 bc6 26.Ne7 Kf8 27.Nc6 Bc7 28.Nb4 (28.Bc3 Bc4=+) 28...Be2 29.Nc6 Bb5 30.Nb4 Ke7 31.Nc2 (31.g3 f6=+) 31...h6 (31...Be2 32.Nce1=+) 32.Bc3 g5 33.h4 (33.Bb4!? Ke8 34.Bd6 Bd6 35.ed6–/+) 33...g4 34.Nfd4 (34.Nh2 Ne5 35.Be5 Be5 36.Ng4 Bg7–/+) 34...Ba4 35.Bb4 (35.h5 Kf8–/+) 35...Ke8 36.Bd6? (better 36.Ne3 Ne5 37.h5–+) 36...Bd6–+ 37.ed6 e5 38.Nf5 (38.f3 gf3 39.gf3 h5–+) 38...Bc2 39.Nh6 (39.Ne3 Bg6 40.Ng4 h5–+) 39…f5 (39...f5 40.Kf1 Nb6–+) 0–1. Piron,Jean_Marie (1805) – Piacentini,Claudio (2105), Interligues FEFB, 2010.

9.Bc4 Bd7 10.0–0 Ne4 (10...ab5 11.ab5 Ra1 12.Ba1= Be8 13.Nc3 Nbd7 14.Bb2 Nb6 15.Be2 h6 16.Qc2 Nbd5) 11.Nc3 (11.Na3 ab5 (11...Qc7 12.Qc2 Bf6 13.d4 Nd6 14.Bd3 Rc8 15.Rac1 c4 16.Nc4 Nc4) 12.ab5 Qc7 13.Qc2 Bf6 14.d4 Ng5 15.Ng5 Bg5 16.Bd3 g6) 11...Nd6 (11...ab5 12.ab5 Ra1 13.Qa1 Nd6 14.Be2 Qc7 15.Rc1 Rc8 16.h3 c4) 12.Qb3 (12.Be2 ab5 (12...Bf6 13.Qc2 Bc8 14.Rfb1 h6 15.h3 Nd7 16.ba6 b6) 13.ab5 Ra1 14.Qa1 f6+= (14...Qc7 15.h3 c4 16.Ba3 Rc8) 15.Qa7 c4 16.Ra1 Nb5) 12...Nc4 (12...Qc7 13.Ne5 Bf6 14.Ng4 Bc3 15.Bc3 Nc4 16.Qc4 f6) 13.Qc4 b6 (13...Bc8 14.d4 (14.h4 Nd7 15.Ne4 b6 16.h5 Bb7) 14...Nd7 (14...cd4 15.Nd4 Nd7 16.Rfd1 Ne5) 15.dc5 (15.Rfd1 cd4 16.Qd4 Nf6) 15...Nc5 16.Rfd1 (16.Ba3 Qc7) 16...ab5 17.Nb5=; 13...Qb6 14.Ne5 Qd6 15.Nd3 f5 16.Ba3 b6) 14.Ne4 (14.Rfd1+= ab5 (14...Qc7 15.Ne2 Bc8 16.Be5 Qa7) 15.ab5 Ra1 16.Ra1 Be8+/– (16...Qc7+=); 14.Ne5 f6 15.Nd3 Bc8 16.h4 Qd7) 14...Qe8 (14...Bc8 15.Qc3 f6 16.d3 Bb7) 15.Nc3 (15.Neg5 h6 16.Qe4 hg5) 15...Qc8 (15...Qd8 16.Ne5 f6) 16.h4 (16.Ne5 Qb7+/– (16...Ra7+=); 16.Ne2 Be8) 16...Be8 (16...Qb7+/–) 17.Qg4 f5 18.Qg3 (18.Nd5 A) 18...fg4? 19.Ne7 Kh8 20.Nc8 gf3 21.Nb6 fg2 22.Rfb1+– (22.Na8?! gf1N 23.Kf1 ab5+/–); B) 18...Rf7 19.Ne7 Re7+=) 18...Bf6= 19.Rfc1 Qb7 (19...Bh5 20.d4=) 20.Ne5 (20.d4 Nd7=) 20...Nd7 21.Nc4 ab5 (21...a5 22.Ba3=) 22.ab5 Rd8 23.Nd6 (23.Ra6!?=) 23...Qb8=/+ 24.Ne8 Qg3?? (better is 24...Rfe8 would hold out 25.Na4 Qg3 26.fg3 Rb8+=) 25.Nf6+– (25.fg3 is no comparison 25...Rfe8 26.Ra7 Ne5=) 25...Nf6 26.fg3 Rd2 27.Na4 Nd5 28.Bc3 Rd3 29.Kf2 Re3 30.Ra2 Ra8+/= 31.Rca1 Ra4 32.Ra4 Rc3 33.Ra7 Rb3 34.Re1+/= Rb5 35.Re6+/– Kf8 36.Rd6 Ne7 37.Rd8+/= Kf7 38.Rdd7 Ke6?? 39.Re7+– Kd5 40.Rg7 c4 41.Rgd7 Kc5 42.Rac7 Kb4 43.Rd1 Rc5N 44.Rb1 Kc3 45.Rc5 bc5 46.Ke3 Kc2 47.Rb5 Kc3 48.Rc5 Kb3 49.Kd4 Kb4 50.h5 c3 51.Rc4 Kb3 52.Rc3 Kb4 53.Rc7 Kb3 54.Rh7 Kc2 55.Rc7 Kd2 56.h6 Ke2 57.h7 Ke1 58.Ke3 Kf1 59.h8R Kg2 60.Rc2 Kg3 61.Rg8 Kh3 62.Kf3 f4 63.Rh8# 1–0. Majdiuk,B – Fojcik,H, Poland–ch (Women), 1978.

9.Bc4 Bd7 10.Nc3 A) 10...Ne8 A1) 11.Bd3 Nd6 (11...f5 12.Qb3 ab5 13.ab5 Ra1 14.Ba1 Nd6 15.Ne5 Bf6 16.Na4 c4; 11...ab5 12.ab5 Ra1 13.Qa1 Nd6 14.0–0 c4 15.Bc2 f5 16.Qa4 Na6; 11...g6 12.Ne5 ab5 13.ab5 Ra1 14.Qa1 Bc8 15.Ke2 Nd7 16.Nc4 Nef6; 11...Bf6 12.Qb1 ab5 13.ab5 Ra1 14.Ba1 Qa5 15.0–0 c4 16.Bc4 Nd6) 12.Qc2 f5 13.0–0 Bf6 14.e4 c4 15.e5 cd3 16.Qd3 Nf7; A2) 11.Be2 Nd6 (11...Bf6 12.0–0 ab5 13.ab5 Ra1 14.Qa1 Nd6 15.e4 e5 16.Qa7 b6; 11...ab5 12.ab5 Ra1 13.Qa1 Qc7 14.h3 Nd6 15.0–0 Be8 16.Na4 f6; 11...Qc7 12.0–0 Nd6 13.Qc2 c4 14.Nd4 f5 15.Ba3 Bf6 16.Qb2 b6) 12.0–0 ab5 13.ab5 Ra1 14.Qa1 Qc7 15.h3 Be8 16.Na4 f6; A3) 11.0–0 ab5 (11...Nd6 12.Be2 ab5 13.ab5 Ra1 14.Qa1 Qc7 15.h3 Be8 16.Na4 f6) 12.ab5 Ra1 13.Qa1 Nd6 14.Be2 Qc7 15.h3 c4 16.Ba3 Rc8; B) 10...Be8 B1) 11.Be2 ab5 (11...Bd6 12.0–0 ab5 13.ab5 Ra1 14.Qa1 Nbd7 15.Qb1 Nd5 16.Qc2 N7f6) 12.ab5 Ra1 13.Qa1 Nbd7 14.0–0 Nb6 15.Rc1 Bd6 16.Na4 Na4; B2) 11.Qc2 ab5 12.ab5 Ra1 13.Ba1 Nbd7 14.Be2 Nb6 15.0–0 Nbd5 16.Qb3 Nb4; B3) 11.h3 ab5 12.ab5 Ra1 13.Qa1 Nbd7 14.0–0 Nb6 15.Be2 Qc7 16.Qa5 Bd6; B4) 11.0–0 ab5 12.ab5 Ra1 13.Qa1 Nbd7 14.Qa7 Nb6 15.Be2 Qc7 16.Ra1 c4; C) 10...ab5 11.ab5 Ra1 12.Qa1 Bc8= 13.0–0 Nbd7 14.Qa7 Nb6 15.Be2 Bd6 16.Rc1 Qc7.

9.Bc4 Nbd7 10.ba6 ba6 11.d3 Nb6=.

9.Bc4 Nbd7 10.Nc3 ab5 11.ab5 Ra1 12.Qa1=.

9.Bc4 Nbd7 10.Nc3 Qc7 (10...ab5 11.ab5 Ra1 12.Qa1=) 11.0–0 Rd8 12.Qc2 a5 (12...b6 13.ba6 Ba6 14.Nb5=) 13.Ne4 h6 (13...Ne4 14.Qe4 Nf6 15.Qc2=) 14.Ng3 (14.Rac1 b6+=) 14...b6= 15.d3 Bb7 16.e4 (16.Nd2 Bd6=) 16...Ng4 (16...Rac8 17.Rac1=) 17.Nd2 (17.Nh5 Bd6 18.Bg7 Bh2 19.Kh1 Be5 20.Be5 Nde5 21.Ne5 Qe5+=) 17...h5 (17...Bf6 18.Bf6 Ndf6 19.Rae1=) 18.h3 (18.Nf3 h4 19.Nh5 Bd6=) 18...h4 19.hg4 hg3 20.f4 e5 (better is 20...Bf6!?+=) 21.Qc3+/– Bf6 (better is 21...Nf8!?+/–) 22.g5+– Be7 23.fe5 Bg5 24.Rf7 (24.Bf7?! Kh7 25.Nc4 Rf8+–) 24...Kh8 25.e6 Be3 (25...Bf6 26.e5 (26.Rf6?! Nf6 27.Qe5 Qe7+/–; 26.Rd7 Rd7 27.e5 Rd4–+) 26...Qe5 27.Qe5 Ne5 28.Rb7+–) 26.Kf1 Bd4 27.Qc1 (better is 27.Ke2 Kh7 28.Rh1 Kg6+–) 27...Rf8 28.Ke2 (28.ed7?! Rf7 29.Bf7 Bb2 30.Qb2 Rf8+/–) 28...Rf7 29.Qh1 Kg8 30.ef7 Kf8 31.Bd4 cd4 32.Qh4 (32.Rf1 Ke7 33.Qh4 Nf6+–) 32...Qd6 33.Rf1 Rc8 (33...Qh6 34.Qg3 Nc5 35.Rh1 Qe3 36.Qe3 de3 37.Nf3+–) 34.Qh8 Ke7 35.Qg7 Nf8 36.Qg5 Kd7 37.Qf5 (37.Rf6!? Qc7+–) 37...Ke7 38.Qg5 (38.Bd5 Bd5 39.ed5 Kd8+–) 38...Kd7 39.Rf6 Qe7 (39...Qc7 40.Rh6 Qc5 41.Qc5 Rc5 42.Rb6+–) 40.Qf4 (better is 40.Bd5 Rc5 41.Nc4 Rc4 42.dc4+–) 40...Rc4 (40...Qc5+–) 41.Nc4 Qc5 42.Qf5 1–0. Nierle,W – Geisler,Robert, corr, 1971.

9.Bc4= Nbd7 10.d3=.

9.Bc4 Ne4 10.0–0 Nd6 11.Be2 ab5 12.ab5 Ra1 13.Ba1 Qb6 (13...b6 14.d4=) 14.Nc3 (14.d4 Bd7 15.dc5 Qc5=) 14...Bd7 Increasing the pressure on the isolated pawn on b5 15.Qc2 Rc8 (15...Nb5? 16.Bb5 Bb5 17.Rb1+–; 15...Bb5? 16.Rb1 Nc6 17.Nb5+– (worse is 17.Bb5 Nb4 18.Qb2 Bf6+–; 17.Rb5?! Nb5 18.Nb5 Ra8+/–)) 16.Rb1 Be8 (16...f6 17.d4 cd4 18.Nd4=) 17.Qb2 (17.Ne4 f6 (17...Nb5? 18.Bb5 Bb5 19.Qc3+–) 18.Nd6 Bd6+=) 17...Bf6 18.Bd3 (18.Qa3 Nd7=) 18...Nd7 (18...c4 19.Be2=) 19.Qc2 h6 20.h3 (20.Na4 Qa5 21.Bc3 Bc3 22.Nc3 Nf6=) 20...c4 21.Be2 Qa5 22.Nd4 (22.Bb2 Nc5=) 22...Nc5+= 23.Qa2 (better is 23.Nf3!?+=) 23...Qa2–/+ 24.Na2 Bd4 (24...e5 25.Nf3 Ra8 26.Nc1–/+) 25.Bd4 Nb3 (25...Bb5 26.Nc3 Ba6 27.Rb6–/+) 26.Bc3 (26.Be5 Nb5 (26...Nd2?! 27.Rd1=) 27.Rb2 f6+=) 26...Bb5 27.Nc1 (27.Bb4 Nf5–/+) 27...Nc1 (27...Nc5 28.Ra1–/+) 28.Rc1 Ba6 (28...Ra8 29.Be5 Rd8 30.Bd6 Rd6 31.Bc4 Bc4 32.Rc4 Rd2 33.Rc8 Kh7 34.Rc7+=) 29.Bb4 (better is 29.Kf1–/+) 29...Rc6?? (better is 29...Rd8–/+) 30.Bf3+/– Rb6 31.Bc5 Rb2 (31...Nc8 32.Bb6 Nb6 33.Bb7 Bb7 34.Rb1+/–) 32.Bd6 Rd2 33.Be5 f6 34.Bd4 (34.Bc3 Ra2+/–) 34...Ra2 (34...Kf7 35.Rb1 e5 36.Bc3+/–) 35.Rb1 b5 (35...e5 36.Bc5+/–) 36.Bc6 Ra5 (36...e5 37.Bc5+/–) 37.Bb6 (37.g4 Kf7+/–) 37...Ra2 38.Bb5 (38.Bc5 Ra4 39.Be8 Ra2+/–) 38...Bb5 39.Rb5 c3 40.Rc5 c2 41.Kh2 Kh7 (41...Kf7 42.Kg3+/–) 42.Kg3 Rb2 (42...e5 43.Kf3 Rb2 44.Bc7+–) 43.Bc7+– Kg6 (43...f5!? 44.Kf3+–) 44.Kf3 (44.Kf4 e5 45.Ke4 c1Q 46.Rc1 Rf2+–) 44...h5 (44...e5 45.Ke4+–) 45.Rc3 (45.e4 e5+–) 45...Kf5 46.e4 Kg6 47.Bf4 Kf7 (47...Ra2 48.Bc1+–) 48.Bc1 Ra2 49.Ke2 f5 50.Kd2 (50.ef5 ef5 51.Kd3 Kf6+–) 50...Ra4 (50...fe4 51.Rc2 Rc2 52.Kc2+–) 51.ef5 (51.Rc7 Kf6 52.Bb2 e5 53.Rc6 Kf7 54.Be5 Re4 55.Rc7 Ke6 56.Bg7 f4+–) 51...ef5 52.Rc2 (52.Rc7 Ke6+–) 52...Ra6 (52...g5 53.Kd3 g4 54.hg4 hg4 55.Re2+–) 53.Ke3 (53.Rc7 Kf8+–) 53...g5 54.Bb2 Kg6 (54...Re6 55.Kd4+–) 55.Rc7 Re6 (55...h4 56.Rg7 Kh6 57.f4 Re6 58.Kf3 gf4 59.Kf4+–) 56.Kf3 (56.Kf3 h4 57.Rg7 Kh6 58.Rd7+–; 56.Kd3 h4+–) 1–0. Blaszczak,Jan – Kadziela,Krzysztof, Radom Poland, 1992.

9.Na3 Nbd7

10.0–0 ab5 11.ab5 A) 11...Nb6 12.Nc4 Ra1 13.Ba1 (13.Qa1 Nc4 14.Bc4 b6 15.d4 Bb7 16.dc5 bc5=) 13...Bd7 14.Qb3 Nbd5 15.d4 Ne4 16.Qc2 f5+=; B) 11...c3 12.Bc3 Nb6 B1) 13.Qc2 Bd7 14.Ra2 Nbd5 (14...Nfd5 15.Rfa1 c4 16.Nc4 Ra2=) 15.Rfa1 Nc3 16.dc3 Qc7=; B2) 13.Qb3 Bd6 14.Nc4 Ra1 15.Ra1 Nc4 16.Qc4 Nd5+=; C) 11...b6 C1) 12.Qc2 C11) 12...c3 C111) 13.dc3 Qc7 (13...Bb7 14.Rfd1 Qc7 15.c4 Rfd8 16.Ng5 h6=) 14.Bd3 Bb7 15.e4 Qf4 16.Bc1 Qg4=; C112) 13.Qc3 Bb7 14.Nc4 Qc7 15.d3 Rfd8 16.Rfc1 Bd5=; C12) 12...Bb7 13.Nc4 Qc7 14.Rfc1 Rfd8 15.d3 Nd5 16.d4 Ra1=; C2) 12.Nc4 Ra1 13.Qa1 Bb7 14.Rd1 Qc7 15.Be5 Ne5 16.Qe5 Qb8+=; D) 11...Qc7 12.Qc2 b6 13.Nc4 Bb7 14.Rfc1 Rfd8 15.d3 Nd5 16.Ra8 Ra8=.

10.0–0 b6 A) 11.Qc2 A1) 11...Nd5 12.Nc4 Bb7 13.d4 Nb4 14.Qb3 Bd5 (14...Qc7 15.Rfd1 Rfd8 16.Ba3 a5=) 15.Rfd1 ab5 16.ab5 cd4+=; A2) 11...Bb7 12.Nc4 Qc7 A21) 13.Rfc1 Rfd8 14.d3 (14.Nfe5 Nd5 15.ba6 Ba6 16.Bf3 Bb7=) 14...Ng4 15.h3 Ngf6 16.Nfe5 Bd5=; A22) 13.Rfb1 Rfd8 14.a5 ab5 15.ab6 Qc6 16.Na5 Qb6+=; A3) 11...Qc7 12.Nc4 Bb7 13.Rfc1 (13.Rfb1 Rfd8 14.a5 ab5 15.ab6 Qc6 16.Na5 Qb6+=) 13...Rfd8 14.d3 Ng4 15.h3 Ngf6 16.Nfe5 Bd5=; A4) 11...Kh8 12.Nc4 Bb7 13.Rfd1 Be4 14.d3 Bd5 15.e4 Bb7 16.ba6 Ra6+=; A5) 11...Re8 12.Nc4 Bb7 13.Rfc1 (13.Rfb1 Nd5 14.d3 N7f6 15.Qb3 Nb4 16.Nfe5 Nfd5=) 13...Qc7 14.ba6 (14.d4 Rec8 15.dc5 Bc5 16.ba6 Ra6=) 14...Ra6 15.Na3 (15.Nce5 Ra7 16.Nd7 Nd7=) 15...Raa8 (15...Ra5 16.Nb5 Qd8=) 16.Nb5 Qb8= (16...Qd8=); A6) 11...Ra7 12.Nc4 Bb7 13.Rfd1 Qc7 14.Nfe5 Rfa8 15.Nd7 Nd7 16.d4 ab5=; A7) 11...c3 12.dc3 Qc7 13.Rfd1 Rd8 14.Rab1 Bb7 15.ba6 Be4 16.Bd3 Bd3=; B) 11.Bc4 B1) 11...ab5 12.Nb5 Bb7 B11) 13.Qe2 Ne4 14.d3 Nd6 15.e4 (15.Rfd1 Bd5 16.e4 Bc6+=) 15...Nc4 16.dc4 Qc8=; B12) 13.d3 Bc6 14.Qe2 Ra5 15.Bc3 Ra8 16.e4 Qb8+=; B2) 11...Bd6 12.d4 Qe7 13.Ne5 cd4 14.Nc6 Qe8 15.Qd4 Bc5 16.Qh4 Bb7+=; B3) 11...Ne8 12.d4 Bb7 B31) 13.ba6 Ba6 14.Qe2 Bb7 15.Nb5 Nd6 16.Bd3 (16.Nd6 Bd6=) 16...Bd5=; B32) 13.Qe2 ab5 14.ab5 Bf3 15.Qf3 cd4 16.ed4 Ndf6=; B4) 11...Bb7 12.ba6 (12.Qe2 ab5 13.Nb5 Ne4 14.d3 Nd6 15.e4 Nc4 16.dc4 Qc8=) 12...Ba6 13.Nb5 Bb7 14.d3 Nd5 15.e4 Nf4 16.Re1 Bf6=; B5) 11...Nd5 12.d4 Bb7 13.ba6 Ba6 14.Nb5 Bb7 15.e4 Nf4 16.Qd2 Bg5+=; B6) 11...Re8 12.d4 Bb7 13.ba6 Ba6 14.Nb5 Bb7 15.Qe2 cd4 16.Nbd4 Qc7=; C) 11.Nc4 Qc7 (11...Nd5 12.d4 Bb7 13.Qc2 Nb4 14.Qb3 Bd5 15.Rfd1 Qc7 16.dc5 Bc5+=; 11...Bb7 12.Qc2 Qc7 13.Rfb1 Rfd8 14.a5 ab5 15.ab6 Qc6 16.Na5 Qb6+=) 12.a5 ba5 13.Ra5 Bb7 14.ba6 Ba6 15.Ra1 Rfb8 16.Qc2 Bd6=.

10.0–0 c3 A) 11.Bc3 A1) 11...b6 12.Qc2 A11) 12...Nd5 A111) 13.Rfb1 N7f6 14.ba6 Ba6 15.Ba6 Ra6 16.Nc4 Qa8= (16...Nc3=); A112) 13.Rfd1 Bb7 14.ba6 Ba6 15.Nb5 Bb7 16.Rac1 Qb8=; A12) 12...Bb7 13.ba6 Ba6 14.Nb5 Bb7 15.Rfd1 Ne4 16.d4 Nc3=; A2) 11...ab5 12.ab5 Nb6 13.Qc2 Bd7 14.Ra2 Nfd5 15.Rfa1 c4 16.Nc4 Ra2=; A3) 11...Nd5 12.Nc4 b6 13.Qb3 (13.Qc2 Bb7 14.Rfd1 Qc7 15.ba6 Ba6 16.Bb2 Rfd8=) 13...Bb7 14.ba6 (14.Rfd1 Qc7 15.ba6 Ba6 16.Bb2 Rfd8=) 14...Ra6 15.a5 Nc3 16.dc3 Bd5+=; A4) 11...Kh8 12.ba6 b6 13.a7 Ra7 14.Nb5 Ra8 15.Qc2 Bb7 16.Rab1 Ne4=; A5) 11...Re8 12.ba6 b6 13.a7 Ra7 14.Nb5 Ra8 15.Qc2 Bb7 16.Rfd1 Ne4=; B) 11.dc3 B1) 11...Qc7 12.Qc2 Rd8 13.Rfd1 e5 14.Nh4 Bf8 15.Nf5 g6 16.Ng3 Bg7=; B2) 11...ab5 12.ab5 Qc7 (12...e5 13.Qc2 Qc7 14.Nc4 Ra1 15.Ra1 Re8 16.e4 b6+=) 13.Qc2 Rd8 14.Nc4 Ra1 15.Ra1 b6 16.Bd3 Bb7=; B3) 11...b6 12.Qc2 Qc7 13.Rfd1 Rd8 14.Rab1 Bb7 15.ba6 Be4 16.Bd3 Bd3=; B4) 11...Qa5 12.Nc4 Qc7 13.Qb3 Nd5 14.Rfd1 Rd8 15.Na3 Bf6 16.c4 Bb2+=; B5) 11...e5 12.Qc2 Qc7 13.Rfd1 e4 (13...Rd8 14.e4 ab5 15.ab5 Ra5 16.Nc4 Ra1+=) 14.Nd2 Qe5 15.c4 (15.Nac4 Qe6 16.Na3 Rd8=) 15...Qe6 16.a5 Rd8=.

10.Nc4 ab5 11.ab5 Ra1 12.Qa1 Nb6 13.0–0 Bd7 (13...Nc4 14.Bc4 b6 15.d4 Bb7 16.dc5 bc5=) 14.Nce5 (14.Nb6 Qb6 15.Bc3 (15.Qa4 Rd8 16.Ra1 Qd6+=; 15.Rb1 Rc8 16.Be5 Ne8=) 15...Qd6 (15...Bb5?? 16.Rb1+–; 15...Rb8+= 16.Ne5 Be8+=) 16.Rc1 Qd5+= (16...Rc8+=)) 14...Qa8 (14...Be8 15.Rc1= (15.Ba3 Nfd5 16.d4 f6+=) 15...Nfd5 16.d4 c4+=; 14...Qc7 15.Rc1 Ra8 16.Qb1 Na4+=) 15.Nd7 (15.d4 Na4 16.dc5 Nb2+=) 15...Nbd7 16.Ne5 (16.d4 Rc8+=) 16...Nb6 (16...Qd8+=) 17.Ng4 (17.d4 Na4+=) 17...Nbd7 (17...Ng4 18.Bg4 Rd8 19.Qa8 Ra8 20.Ra1=) 18.d4 Ng4 (18...Rd8 19.Nf6 Bf6 20.Rc1+=) 19.Bg4 cd4 20.Bd4 Bf6 21.Bf3 e5 (21...Qa1 22.Ra1 Rb8 23.Bf6 gf6 24.Rc1+–) 22.Bb2 (22.Qa8 Ra8 23.Bb7 Rb8+–) 22...Qa1 '+/=' 23.Ba1 Nc5 24.Bd5 Ra8 25.Bc3 Ra4 26.Ra1 Ra1 27.Ba1 Kf8 28.Bc3 b6 29.g4 h6 30.h4 (30.Kg2 Na4 31.Bd2 Nc5+=) 30...g5 (better 30...Bh4!? 31.Kg2 Bf6=+) 31.hg5 hg5 32.Kf1 Ke7 (32...Kg7 33.Kg2+=) 33.Ke2 '+/–' 33...Bg7 (33...e4 34.Bb4+–) 34.Bb4 f6 35.Bc5 bc5 36.Kd3 Kd8 (36...Kd6 37.b6+–) 37.b6 '+–' 37...Bf8 38.Bc6 (38.Be6!? Bd6+–) 38...Kc8 '+/–' 39.Kc4 Be7 40.Kd5 Kb8 41.b7 Kc7 42.Ke6 Bd8 43.Bd5 Kb8 (43...e4 44.Kf5+–) 44.Kf7 (better 44.Kd7 Ba5 45.Ke7+–) 44...Ba5 '?' (better 44...e4+–) 45.Kf6 '+–' 45...Be1 (45...c4 46.Kg5 c3 47.Be4+–) 46.f3 Bd2 '?' (46...Bh4+–) 47.Kg5 Be3 (47...c4+–) 48.Kf6 Bd4 (48...c4 49.g5 c3+–) 49.Be4 c4 (49...Bf2 50.g5 Bh4 51.Kf5 Bg5 52.Kg5 c4 53.Kf5 c3 54.Ke5 c2 55.Bc2 Kb7 56.f4 Kb8 57.f5 Kb7 58.f6 Ka6 59.f7 Kb5 60.Bd3 Ka4 61.Kd4 Kb3 62.f8Q Kb2 63.Kc4 Kc1 64.Kc3 Kd1 65.Qf1) 50.g5 c3 (50...Bc5 51.g6 Bf8 52.g7 Bg7 53.Kg7 c3 54.Kf7 c2 55.Bc2 Kb7 56.Kf6 Kc6 57.Ke5 Kc7 58.f4 Kd7 59.f5 Ke7 60.Bb3 Kd7 61.f6 Ke8 62.Kd6 Kf8 63.f7 Kg7 64.Ke7 Kh6 65.Bd1 Kg5 66.f8Q Kh4 67.Qf3 Kg5 68.Qf6) 51.Kf7 (51.g6 Ba7 52.g7 Kc7 53.g8Q Kb6 54.Qb3 Kc5 55.Qa3 Kc4 56.Qa7 c2 57.b8Q c1N 58.Qa4 Kc5 59.Qc7) 51...c2N 52.Bc2 Kb7 53.g6 Kc6 54.g7 Kb5 55.g8Q Kb4 56.Qb8 Kc3 57.f4 Kc2 58.fe5 Kc3 59.Qc7 Kb4 60.e6 Bc5 61.Qc6 Be7 62.Ke7 Kb3 63.Kd6 Kb4 64.e7 Ka3 65.Qb5 Ka2 66.e8Q Ka1 67.Qa8 1–0. Cubitt,Clive – Foster,CL, BCF–ch U18 Rhyl, 1969.

10.Nc4 b6 A) 11.d3 Nd5 (11...Bb7 12.Qc2 Nd5 13.0–0 Nb4 14.Qb3 Bd5 15.d4 Qc7 16.dc5 Bc5=) 12.0–0 Bf6 13.Qb3 Bb7 14.ba6 Ba6 15.Rab1 Bb2 16.Rb2 Qf6=; B) 11.Qc2 ab5 (11...Bb7 12.0–0 Qc7 13.Rfb1 Rfd8 14.a5 ab5 15.ab6 Qc6 16.Na5 Qb6+=; 11...Re8 12.0–0 Bb7 13.Rfc1 Qc7 14.d4 Rec8 15.dc5 Bc5 16.ba6 Ra6=; 11...Nd5 12.0–0 Bb7 13.d4 Nb4 14.Qb3 Bd5 15.Rfd1 cd4 16.Bd4 ab5+=; 11...Ra7 12.0–0 Bb7 13.Rfd1 Qc7 14.Nfe5 Rfa8 15.Nd7 Nd7 16.d4 ab5=) 12.ab5 Ra1 13.Ba1 Bb7 14.0–0 Qc7 15.Rc1 Ng4 16.h3 Bf3=; C) 11.0–0 Bb7 (11...Nd5 12.d4 Bb7 13.Qc2 Nb4 14.Qb3 Qc7 15.Rfd1 Rfd8 16.Ba3 a5=) C1) 12.d3 C11) 12...ab5 13.ab5 Ra1 14.Ba1 Qc7 15.Nfe5 Ra8 16.Bh5 Nh5= (16...Ne5=); C12) 12...Qc7 13.Nfe5 ab5 14.ab5 Ra1 15.Qa1 Ra8 16.Qb1 Bd5=; C2) 12.Qc2 Qc7 13.Nfe5 Rfd8 14.d3 Nd5 15.Rfb1 Nb4 16.Qc1 ab5=.

10.Nc4 Nb6 A) 11.0–0 Nc4 (11...ab5 12.ab5 Ra1 13.Qa1 Nc4 14.Bc4 b6 15.d4 Bb7 16.dc5 bc5=; 11...Nbd5 12.d4 b6 13.Qb3 Ne4 14.a5 ab5 15.Nb6 Nb6 16.ab6 Rb8+=) 12.Bc4 ab5 13.ab5 Ra1 14.Qa1 b6 15.d4 Bb7 16.Ne5 Qc7=; B) 11.Nb6 Qb6 12.ba6 ba6 13.Rb1 Qc6 14.Ne5 Qc7 15.Nc4 Rb8 16.d3 Rb4=.

9.Bc4 ab5=

10.ab5 Ra1 11.Ba1 Qa5 12.Bc3 Qb6 13.0–0 Bd7 The isolani on b5 becomes a target 14.Qb3 Ne4 15.Bb2 Nd6 Increasing the pressure on the isolated pawn on b5 16.Na3 h6 (16...Rd8 17.Ra1=) 17.Ne5+= Be8 (17...Rd8 18.Ra1+=) 18.Be2 Ne4 (18...Nd7 19.Nec4 Qc7 20.b6+–) 19.Nec4+– Qd8 20.Qc2 (20.Rd1 Nf6+–) 20...Nd6+= 21.Nd6 Qd6 22.Nc4 Qd8 23.f4 (better 23.Qe4 Qc8 24.Qg4+=) 23...Bb5=+ 24.Bf3 (24.f5 Nc6=+) 24...Bc6 (24...Bc4!? 25.Qc4 Qd2–+) 25.Ne5 Bf3 26.Rf3 Nd7 27.Rg3 Ne5 28.Be5 f6 29.Bb2 (29.Bc3 b5–/+) 29...Qe8 (29...b5 30.Bc3–/+) 30.Qc4 Qf7 31.Qb5 Rd8 32.Bc3 Bd6 33.Qb6 Qe7 34.d4 cd4 35.Bd4 Kf7 (35...e5 36.fe5 Be5 37.Be5 Rd1 38.Kf2 fe5 39.Ke2–/+) 36.Qb5 (better 36.Rf3–/+) 36...Qd7?? (better 36...Bf4 37.Rf3 Bd6–+) 37.Qh5+– Kf8 38.Qg6?? (better 38.Bf6 b6 39.Bg7 (worse 39.Bd8 Qd8 40.Qg6 Qc7+–) 39...Qg7 40.Rg7 Kg7 41.Qh3+–) 38...Qf7 (38...Bf4 39.Rf3 Bg5 40.Qh7–+) 39.Qh7 (better 39.Qc2–/+) 39...Qg8?? (better 39...Bf4 40.Rg4 Be5 41.Be5 Rd1 42.Kf2 fe5 43.Kg3 Re1 44.Qh8 Qg8 45.Qg8 Kg8–+) 40.Qb1= Qf7 41.Qh7 Qg8?? (better 41...Bf4 42.Rg4 Be5 43.Be5 Rd1 44.Kf2 fe5 45.Kg3 Re1 46.Qh8 Qg8 47.Qg8 Kg8–/+) 42.Qb1= Qf7 43.Qh7 Qg8?? (better 43...Bf4 44.Rg4 Be5 45.Be5 Rd1 46.Kf2 fe5 47.Kg3 Rd2–/+) 44.Qb1= Qf7 45.Qh7 Qg8 ½–½. GuestPLHL – GuestSQTD, freechess.org, 2018.

10.ab5 Ra1 11.Ba1 b6 12.d4 Bb7 (12...Qc7 13.dc5 Rd8 14.Nbd2 Qc5 15.Bd4=) 13.0–0 (13.dc5 Bc5 14.Qd8 Rd8 15.Bf6 gf6=) 13...Nbd7 (13...Qc7 14.dc5 Rd8 15.Qe2 Qc5 16.Nbd2=) 14.Nbd2 Ne4 (14...Bd6 15.Qe2=) 15.Ne4 Be4 16.d5 ed5 17.Bd5 Bd5 (17...Bg6 18.Qb3+=) 18.Qd5 Nf6 19.Qb7 (19.Qc6 Nd5+=) 19...Re8 (19...Bd6 20.Qc6+=) 20.Ne5+= Qb8 (20...Qd6 21.Nc4 Qd5 22.Qd5 Nd5 23.e4+=) 21.Qb8 Rb8 22.Rd1 Rd8 23.Rd8+/– Bd8 24.Nc6 Bc7 25.Ne7 Kf8 26.Bf6 gf6 27.Nd5 Bd8 28.Kf1 Ke8 29.Ke2 Kd7 30.Kd3 Kd6 31.Kc4 Ke5 32.h3 f5 33.Nc3 Kd6 34.Ne2 Bh4 35.g3 Bg5 36.f4 Bf6+= 37.g4 fg4 38.hg4 Ke6 39.e4 Be7 40.Nc3+/– f6 41.Kd3 Kd6 42.Ke3+/– Ke6 43.Kd2 Kd6 44.Kd3 Ke6 45.Nd5 Bd8 46.Kc3 Kd6 47.Kb3 Ke6 48.Kc2 ½–½. mrkt – jiikoo, internet, 2005.

10.ab5 Ra1 11.Ba1 Nd5 12.0–0 Nd7 13.d3 Bf6 14.d4 Qa5 (14...N7b6 15.Bd5 ed5 16.dc5 Ba1 17.cb6=) 15.Nbd2+= cd4 16.ed4 (16.Bd4 Bd4 17.Nd4 N7b6+=) 16...N7b6 17.Qc2? (17.Bd3 Rd8=) 17...Bd7 (17...Nc4 18.Qc4 Bd7 19.Rb1–/+) 18.Nb3 (18.Bd3 Bb5 19.Qc5 Bd3 20.Qa5 Ra8 21.Qa8 Na8=) 18...Qb4 (18...Qa4 19.Bd3 g6 20.Qb2–/+) 19.Bd5 (19.Bd3 Bb5 20.Bh7 Kh8=+) 19...Nd5 (worse 19...ed5 20.Nc5 Rc8 21.Qb1 Qb1 22.Rb1=+) 20.Ne5 (20.Nc5 Rc8 21.Rb1 Qa5=+) 20...Be5 (20...Rc8 21.Qa2 Bb5 22.Rb1 Be5 23.de5–+) 21.de5–/+ Qb5 (21...Rc8 22.Qb2–/+) 22.Nd4 Qa5 0–1. GuestJTHK – GuestCPBR, freechess.org, 2017.

10.ab5 Ra1 11.Ba1 Nbd7 12.0–0 Nb6 (12...b6 13.d4+=) 13.Be2 Nbd5 14.Nc3 Nc3 (14...Nb4 15.Qa4=) 15.dc3 (15.Bc3 Nd5+=) 15...Qc7 (15...b6 16.c4+=) 16.c4 Nd7 (16...Bd6 17.Qc2=) 17.Qc2 (17.Bd3 b6+=) 17...Bf6 (17...b6 18.Bd3 g6 19.Be4+=) 18.Bf6 (18.Qe4 Rd8+=) 18...Nf6 19.Rd1 (19.Qb2 Rd8+=) 19...Rd8 (19...e5 20.Ng5=) 20.Rd8+= Qd8 21.Qd3 (21.Ne5 Nd7 22.Qd3 f6+=) 21...Qd3= 22.Bd3 b6 ½–½. Sternik,Ryszard – Wojtunik, Olsztyn Poland, 1985.

10.ab5 Ra1 11.Ba1 Nbd7 12.Qb3 Nb6 (12...b6 13.d4=+) 13.d3= Nc4 (13...Bd7 14.0–0=) 14.dc4 b6 15.0–0 Bb7 16.Nbd2 Qc7 (16...Qd7 17.Re1=) 17.Be5 (17.Rd1 Rd8=) 17...Bd6 (17...Qd7 18.Qc2=) 18.Qb2 (18.Bf6 gf6 19.e4 Rd8=) 18...Be5 (18...Ng4 19.Bd6 Qd6 20.h3=) 19.Qe5 Qd7 (19...Qe5 20.Ne5 Rd8 21.Nb1=) 20.Rc1 (20.e4 Qd3 21.Re1 Qc2=) 20...Rd8 21.h3 h6 22.Qb2 (22.Ra1 Kh7=) 22...Ne4 23.Ne4 Be4 24.Ne1 (24.Ne5 Qd6=) 24...Qd2 (24...Qd6 25.Ra1=+) 25.Qd2= Rd2 26.f3 ½–½. Fournier,Frederic – Boukili,Abdelhakim, Open Paris FRA, 1998.

10.Bb5 Nc6=.

8.a4 Nbd7

9.0–0 ab5 10.ab5 Ra1 11.Ba1 b6 12.d3 Bb7 13.Nbd2 Qc7 14.Ne1 h6 ½–½. algernon (2435) – amikhlin (2425), net–chess.com, 2013.

9.0–0 b6 10.d3 a5 11.Nc3 Bb7=.

9.0–0 b6 10.d3 a5 11.Nbd2 Bb7 12.Qc2 Qc7 (12...Bd6 13.cd5 ed5 14.d4=) 13.h3 (13.Rac1 Rad8=) 13...Rac8 (13...Rad8 14.Rac1=) 14.Rfd1 (14.Rac1 Bd6=) 14...Rfd8 15.Rac1 Qb8 16.Qb1 (16.cd5 Nd5 17.Nc4 Qc7=) ½–½. Balendo,Pavel (2120) – Moskalenko,Alex (2255), Serpukhov–A, 2002.

9.0–0 b6 10.d3 Bb7 11.Nc3=.

9.0–0 Nb6 10.d3 ab5 11.ab5 Ra1 12.Ba1 dc4 13.dc4 Nfd7 14.Nbd2 Bf6 15.Qb3 Ba1 16.Ra1 Qf6 17.Ra7 e5 18.Ne4 Qe7 (18...Qg6 19.Nfd2+=) 19.Nfd2 (19.Qd3!?+/–) 19...f5+= 20.Nc3 Nf6 21.Na4 Na4 22.Qa4 g5 (22...Rd8 23.Qc2=) 23.h3 e4 24.Qa1 f4 25.Qf1 Nd7 26.Qc1 Ne5 27.Ne4 f3 28.Bf3 Nf3 29.gf3 Rf3 30.Ng3 Qf7? (30...Bh3!? 31.Qd1 Rf7+=) 31.Qc2 (31.Qd1 Kg7 32.Qd8 Qf8 33.Qg5 Kh8 34.Qe5 Qg7 35.Qg7 Kg7+–) 31...Bh3 (better is 31...Qd7+/–) 32.Ra4 (32.Qe4 g4 33.Ra8 Kg7 34.Qe5 Kh6+–) 32...h5 (better is 32...Kg7!?=) 33.Ra8+/– Kg7 34.Qc3 Kg6 35.Qd3 Kg7 36.Qc3 (36.Qd6!? Rf2 37.Nh5 Kh7 38.Qd3 Bf5 39.Qc3+=) 36...Kg6= 37.Qd3 Bf5 (37...Kg7!?=) 38.Nf5 (38.Qd6 Be6 39.Rh8 Qd7+/–) 38...Rf5 (38...Qf5 39.Qd6 Qf6 40.Rg8 Kh6 41.Qc5 g4+=) 39.Qd6 (better is 39.Rd8 g4 40.Rd7+/–) 39...Rf6= 40.Qd3 Kg7 41.Ra2 g4 ½–½. algernon (2355) – jparkinson (2505), net–chess.com, 2013.

9.0–0 e5 10.Ne5+= Ne5 11.Be5 ab5 12.ab5 d4?? (better 12...Ra1 13.Ba1 Be6+=) 13.Ra8+– de3 1–0. GuestPHTQ – GuestMHLL, freechess.org, 2019.

9.d3 Qc7 10.0–0 Rd8 (10...dc4 11.dc4 Rd8 12.Qc2=) 11.Nbd2 (11.Na3 Bd6=) 11...a5 (11...b6 12.Qc2=) 12.Qc2 b6 13.Rac1 Bb7 14.e4 (14.Rfd1 Bd6=) 14...de4 (14...d4 15.Rce1=) 15.de4 Bd6 (15...Qf4 16.g3 Qc7 17.Rcd1=) 16.Qc3 (16.Rcd1 Bf4=) 16...e5 (16...Ne5 17.Ne5 Be5 18.Qe5 Qe5 19.Be5 Rd2 20.Bf3=) 17.Bd3 (17.Qe3 Nh5=) 17...Re8 (17...Nf8 18.Ng5=+) 18.Nh4 Rad8 (18...Nh5 19.Nf5=) 19.Nf5+= Bf8 (19...Bc8 20.Rcd1+=) 20.Ne3 g6 (20...Qd6 21.Nd5+=) 21.Nd5 Nd5 (21...Qd6 22.Rcd1+=) 22.cd5+– f6 (22...f5 23.ef5 gf5 24.Bf5 Bd5 25.Nc4+–) 23.Nc4 Bd6 (23...Bh6 24.Qb3 Kg7 25.Rc3+–) 24.Rcd1 (24.Rfd1 Rf8+–) 24...Rf8 25.Bc2 Rf7 (25...Bc8 26.Qf3+–) 26.g4 (26.Qg3 Kg7+–) 26...g5 (26...Bc8 27.Bc1+–) 27.Ne3 h5 (27...Bc8 28.Nf5 Kh8 29.Qf3+–) 28.gh5 (28.Nf5 Rh7 29.gh5 Rh5+–) 28...Rh7 29.Rd2 (29.Nf5 Rh5 30.Qf3 Rh7+=) 29...Kf7 (29...Rh5 30.Bd1 Rh7 31.Bg4+–) 30.Bd1 Rdh8 (30...Nf8 31.Bg4+–) 31.Bg4 Nf8 32.Rc2 (32.Nf5 Ke8+–) 32...Bc8 33.f3 (33.Bc8 Qc8 34.Nf5 Qd7+–) 33...Bd7 (33...Ke8 34.Nc4 Kd8 35.Kf2+–) 34.Nc4 (34.Kf2 Ke7+–) 34...Kg7 (34...Ke7!?+=) 35.Rg2+– (worse 35.Nd6 Qd6 36.h4 gh4+–) 35...Be8?? (better 35...Kf7+–) 36.f4!+– (36.Nd6?! Qd6 37.f4 ef4+–) 36...Bh5 (36...ef4 37.Qf6 Double attack (37.Qf6 Pinning; 37.Qf6 Deflection); 36...gf4 37.Bf5 Double attack) 37.Bh5 Rh5 38.fe5 fe5 (38...Be5 39.Ne5 fe5 40.Qe5 Qe5 41.Be5 Kg6 42.Rf6 Kh7 43.Rgf2+–) 39.Nd6 (39.Qf3 Kh6 40.Qf6 Ng6 41.Nd6 Rf8+–) 39...Qd6 40.Qe5 Qe5 41.Be5 Kg6 42.Bh8 (42.Rf6 Kh7 43.Rgf2 Rg8 44.Rf8 Rh4+–) 42...Rh8 43.e5 Nd7 (43...Nh7 44.d6 Rd8 45.Re2+–) 44.e6 Ne5 (44...Nf6 45.d6 Re8 46.d7 Nd7 47.ed7+–) 45.Re2 Nc4 46.e7 Kg7 (46...Re8 47.Re6 Kg7 48.Rc1+–) 47.e8Q (47.e8Q Re8 48.Re8+–) 1–0. Danek,Vaclav (1990) – Brezovsky,Milan (2140), CZE–chT2a, 2007.

9.d3 Qc7 10.Nbd2 b6 11.0–0 ab5 12.ab5 (12.cd5 ba4 13.de6 fe6 14.Ra4 Bb7=) 12...Bb7 (12...Ra1 13.Ba1 Bb7 14.Qc2=) 13.Qc2 Bd6 14.h3 (14.cd5 ed5 15.Rfc1 Rfe8=) 14...h6 (14...Rfd8 15.cd5 Nd5 16.Ne4=) 15.Rfc1 (15.cd5 Nd5 16.Ne4 e5=) 15...Ra1 16.Ra1 e5 17.Ra7 d4 (17...Rd8 18.e4 de4 19.de4= (worse 19.Ne4 Ne4 20.de4 Be4–/+)) 18.Qa4 (18.Nh4 Ra8 19.Rb7 Qb7+=) 18...Qc8= 19.Qa2 (19.Qb3 de3 20.fe3 Rd8=) 19...Bb8 20.Ra3 de3 21.fe3 e4 (21...Rd8 22.Qb1=) 22.de4 Ne4 23.Ne4 Be4 24.Nd2 (24.Qa1 f6=) 24...Bg6 (24...f5 A) 25.Ne4 fe4 26.Ra8 Qc7 27.Rb8 Nb8–/+ (27...Rb8?! 28.Qb1–/+); B) 25.Bf3 Qc7 26.Nf1=+) 25.Qa1= f6 26.Bf3 Qc7 (26...Bf7 27.Bd5=) 27.Nf1 (27.Bd5 Bf7=) 27...Re8 (27...Ne5 28.Bd5 Bf7 29.Be5 Qe5 30.Qe5 Be5 31.Nd2=) 28.Qd1 (28.Bc6 Qd6=) 28...Ne5 29.Be5 Re5 (29...Qe5 30.Bc6 Rf8 31.Qd7=) 30.Bd5 Kh8 (30...Kh7 31.Qg4=) 31.Ra8 (31.Qf3 Kh7=) 31...Re8 32.Qf3 f5 (32...Qe5 33.Bc6 Rg8 34.g3=) 33.h4+= Bh7 ½–½. Zverev,Konstantin – Sanin,Alexey, RUS–ch U14 Togliatti, 2000. (=1.Nf3 d5 2.b4 e6 3.Bb2 Nf6 4.b5 c5 5.e3 Be7 6.c4 0–0 7.Be2 a6 8.a4 Nbd7)

9.d4 ab5 10.ab5 Ra1 11.Ba1 dc4 12.Bc4 cd4 (12...Nb6 13.Be2=) 13.Bd4 Qa5 (13...Bb4 14.Nfd2=) 14.Nbd2 Nb6 (14...Bd6 15.Qc2=) 15.Bd3+= Bd7 The isolani on b5 becomes a target (15...Rd8 16.0–0 Nbd5 17.Qb3+=) 16.0–0 Bb5? (better is 16...Nbd5 17.Qb3 Qb4+=) 17.Bb6+– Qb6 18.Qb3 Qa5 (18...Rd8 19.Bb5 Qa5 20.Rd1+–) 19.Qb5 Qb5 20.Bb5 Nd5 21.Rb1 Nc3 (21...Rd8 22.Bc4 Nb4 23.Kf1+–) 22.Rb3 Rc8 (22...Na2 23.Rd3 Rd8 24.Rd8 Bd8 25.Ne4+–) 23.Bc4 Ne4 (23...b5 24.Rc3 Bf6 25.Rc1+–) 24.Rb7 (24.Ne4?! Rc4 25.Nc3 h6+–) 24...Nd2 (24...Bd6 25.Kf1 Nd2 26.Nd2+–) 25.Nd2 (25.Re7?! Nf3 26.gf3 Kf8=) 25...Bd6 (25...Kf8 26.Kf1+–) 26.g3 (26.f4 h6+–) 26...g6 (26...h6 27.f4+–) 27.Ne4 Bg3 (27...Be5 28.Bb5+–) 28.hg3 (28.fg3?! Rc4 29.Nf6 Kg7 30.Ne8 Kg8 31.Rf7 Rc8+–; 28.Ng3?! Rc4 29.Kg2 h6+–) 28...Rc4 29.Nd6 (29.Nd6 Rc1 30.Kg2+–; 29.Ng5 f5+–) 1–0. Tilp,Andreas – Lehmann,Thomas, corr DDR, 1987.

9.0–0 dc4

10.Na3 ab5 11.ab5 Nb6 (11...c3 12.Bc3 Nd5 13.Bb2=) 12.Nc4 Nc4? (better 12...Ra1!? 13.Qa1 Nc4 14.Bc4 Bd7+=) 13.Ra8+– (13.Bc4?! Ra1 14.Qa1 Bd6+=) 13...Nb2 14.Qb1 Nd5 15.Qb2 Bf6 (15...Qc7 16.Rc1+–) 16.Qc2 Qb6? (better 16...b6+–) 17.d4! Bd7 (17...cd4 18.Rc8 Decoy) 18.dc5 Qc7 19.Rf8 Kf8 20.Rc1 (20.Nd4 e5 21.Nb3 e4+–) 20...Qa5 (20...Nc3 21.Nd4 Ne2 22.Qe2+– (22.Ne2?! Bb5 23.Nd4 Bd4 24.ed4 Bc6+–)) 21.c6 bc6 22.bc6 Bc8 (22...Nb4 23.Qe4 (23.cd7 Nc2 24.Rc2 Qa1 25.Bf1 Ke7=+) 23...Bc6 24.Rc6 Nc6 25.Qc6+–) 23.Qh7 Ke7 (23...g6 24.Qh6 Bg7 25.Qh4+–) 24.Qc2 Bc3 (24...Qc3 25.e4 Nf4 A) worse 26.Qc3 Ne2 27.Kf1 Nc3+– (27...Bc3?? 28.Ke2 Bb4 29.Kd3+–); B) 26.Bb5 Qc2 27.Rc2+–) 25.Bc4 Bf6 (25...Bb4 26.Bd5 ed5 27.c7+–) 26.Bd5 Qd5 (26...ed5 27.Qb3+–) 27.c7 Be5 (27...Qa5+–) 28.Rd1 Qa5 29.Ne5 Qe5 30.Qc1 (30.Qc1 g5 31.h4+–) 1–0. GuestNDSG – GuestJVLQ, freechess.org, 2020.

10.Na3 c3 11.dc3 Qc7=.

10.Bc4 Nb6

11.Qc2 Nc4 12.Qc4 ab5 13.ab5 Ra1 14.Ba1 b6 15.Nc3 Bb7=+ 16.e4 Qc7 17.Re1 Ra8 18.Bb2 Qf4 19.Qe2 Bd8 (19...Rd8 20.d3=+) 20.d4 cd4 21.Nd4 Bc7 22.g3 Qh6 (22...Qd6 23.Qc4 Ng4 24.f4=) 23.Bc1 (23.Nc6 Nd7=) 23...Qg6 (23...Qh3 24.Rd1=+) 24.Nc6= Bc6 (24...Re8 25.Bb2=) 25.bc6 Be5 26.Nb5 Rc8 27.Qd3 h6 (27...Qh5!? 28.c7! Bc7 29.Nc7 Ng4+–) 28.f4 Bc7 1–0. Reschke,Rene – Koehnke,Torben (2020), Lauenburg op, 2009.

11.Be2 ab5 12.ab5 Ra1

13.Ba1 Nfd5

14.Bb2 A) 14...Qd7 A1) 15.d4 c4 (15...Rd8 16.dc5 Bc5 17.Qc2 Qe7 18.Rd1 Bd6 19.e4 Nf4 20.e5 Ne2+=) 16.Qc1 Qb5 17.Ne5 Bd7 18.Ba3 Rc8 19.Be7 Ne7 20.Na3 Qa4+=; A2) 15.Ne5 Qe8 (15...Qc7 16.d4 cd4 17.Bd4 f6 18.Nf3 Rd8 19.Qb3 Kh8 20.Rd1 e5=; 15...Qd6 16.d4 cd4 17.Bd4 Bf6 18.f4 Qc7 19.Bd3 Nd7 20.Qf3 Rd8+=) 16.d4 f6 17.Nf3 cd4 18.Qd4 e5 19.Qe4 Qh5 20.Nd4 Qg6=; A3) 15.Qc1 Na4 (15...Rd8 16.d4 Na4 17.Ba1 cd4 18.Bd4 Bd6 19.Qc2 Ndb6 20.Bd3 f5+/–; 15...Bd6 16.d4 cd4 17.Bd4 f6 18.e4 Nf4 19.Re1 Bc7 20.Qe3 Ne2+=) 16.Ba3 Rd8 17.Qc2 Ndb6 18.Rd1 Qe8 19.d4 cd4 20.Be7 Qe7+=; B) 14...Bd7 B1) 15.Qc2 Qe8 (15...Bd6 16.Nc3 Nc3 17.Bc3 Qc7 18.Ra1 Rd8 19.Ng5 f5 20.f4 c4+=; 15...Nb4 16.Qb3 N6d5 17.d4 Qb6 18.dc5 Bc5 19.Nc3 Be7 20.Nd5 Nd5+=) 16.Na3 f6 17.Ra1 e5 18.Qe4 g6 19.Qh4 Be6 20.d4 Na4=; B2) 15.e4 Nf4 16.Nc3 c4 17.d4 Bb4 18.Ne5 Bc3 19.Bc3 Bb5 20.Re1 Qg5+=; B3) 15.Qb3 Bd6 (15...Qe8 16.Rc1 c4 17.Bc4 Nc4 18.Qc4 Bb5 19.Qg4 Nf6 20.Bf6 Bf6=; 15...Qb8 16.Rc1 Rc8 17.d3 Qc7 18.Nbd2 Qd8 19.Ne5 f6 20.Nd7 Qd7+=) 16.Nc3 Qc7 17.d3 Nc3 18.Bc3 Nd5 19.d4 Rc8 20.dc5 Nc3=; C) 14...Bd6 C1) 15.Nc3 Nc3 (15...Re8 16.d4 Nc3 17.Bc3 Nd5 18.Bb2 Qb6 19.Ng5 cd4 20.Qc2 f5+=; 15...c4 16.d3 Qc7 17.Qa1 Bd7 18.Nd5 ed5 19.Bg7 Ra8 20.Qf6 Bf8+–) 16.Bc3 Bd7 17.Qc2 Qc7 18.Ra1 Nd5 19.Bd3 h6 20.Qa4 e5=; C2) 15.Qc2 Qe7 (15...Nb4 16.Qc1 Re8 17.Be5 Be5 18.Ne5 Qd6 19.f4 f6 20.Nc4 Nc4=; 15...Bd7 16.Nc3 Nb4 17.Qe4 N4d5 18.Ra1 Qc7 19.Nd5 ed5 20.Qc2 c4=) 16.d4 cd4 17.Nd4 Nb4 18.Qe4 f5 19.Qf3 e5 20.Nb3 Qf7+=; C3) 15.d4 cd4 (15...c4 16.Ba3 Ba3 17.Na3 Qc7 18.Qc2 Nb4 19.Qb1 N4d5 20.Rc1 c3+/–; 15...Qe7 16.e4 Nf4 17.e5 Bc7 18.Ba3 Nd7 19.Bc4 b6 20.Qd2 Ng6+=) 16.Qd4 f6 17.Qh4 f5 18.Qd4 Qe7 19.Rc1 Rd8 20.Ne5 Nd7+=; D) 14...Re8 D1) 15.Nc3 Bd6 (15...Bd7 16.Qc2 c4 17.d3 Nb4 18.Qd2 cd3 19.Bd3 Nd3 20.Qd3 Qc7=; 15...Nb4 16.d4 cd4 17.Qd4 Qd4 18.Nd4 e5 19.Nf3 f6 20.Ra1 Rd8=) 16.e4 Nf4 17.e5 Be7 18.Ba3 Nbd5 19.Bc4 b6 20.Ne4 Qc7+=; D2) 15.Ba3 Nd7 (15...Qc7 16.Qc2 e5 17.Rc1 Nd7 18.Bc4 N5b6 19.Bb3 Qd8 20.d3 g5+=; 15...Qd6 16.d4 Nd7 17.Qc2 b6 18.Rd1 Qc7 19.Bd3 h6 20.Nbd2 Bb7+=) 16.d4 b6 17.Bd3 Bb7 18.Qc2 N5f6 19.Ng5 h6 20.dc5 bc5+=; D3) 15.d4 c4 (15...Bf6 16.Ne5 Nd7 17.Ng4 cd4 18.Nf6 Qf6 19.Qd4 Qd4 20.Bd4 e5+=; 15...cd4 16.Qd4 Bf6 17.Ne5 Nd7 18.Qe4 Nc5 19.Qf3 Qc7 20.Nc4 Bb2=) 16.Ne5 Bd7 17.e4 Nf4 18.Nc3 Bb4 19.Bh5 Rf8 20.Bg4 Bc3=.

14.Qc1 A) 14...Bd7 A1) 15.Nc3 f6 (15...Qc7 16.Nd5 ed5 17.Qc3 f6 18.Rc1 Bd6 19.Qc2 c4 20.Bd4 Rc8=; 15...Qe8 16.d4 c4 17.Ne5 Bb5 18.Nb5 Qb5 19.Nc4 Nc4 20.Bc4 Qc6=) 16.Rd1 Qe8 17.Qb2 Qg6 18.Qb3 Rc8 19.d3 Bd6 20.Ne4 Bf8=; A2) 15.d4 c4 (15...Qa8 16.Bb2 Rc8 17.e4 Nf6 18.Qe3 Qa2 19.Ba3 cd4 20.Nd4 Ba3=) 16.e4 Nc7 17.Nbd2 Bb5 18.Nc4 f5 19.ef5 Rf5 20.Nfe5 Nc4=; A3) 15.Qc2 Qe8 (15...Nb4 16.Qe4 N6d5 17.Rc1 Na2 18.Rd1 Qb6 19.Qg4 Nf6 20.Qc4 Ra8+=; 15...f6 16.Nc3 c4 17.Nd5 ed5 18.Bd4 Qc7 19.d3 Rc8 20.Bb6 Qb6+/–) 16.Nc3 Nc3 17.Bc3 Bb5 18.Bb5 Qb5 19.Rb1 Qc6 20.Qb2 Na4=; B) 14...Nc7 B1) 15.d4 c4 16.Nc3 Bd7 17.Qb1 Ncd5 18.Ne5 Qc7 19.Rc1 Ba3 20.Bb2 Nc3=; B2) 15.e4 Bd7 (15...f5 16.ef5 Rf5 17.Re1 Bd6 18.Qc2 Nbd5 19.Bc3 Nf4 20.Qe4 Qe8=; 15...Qd7 16.d4 c4 17.Bc4 Nc4 18.Qc4 Nb5 19.Rc1 Nd6 20.Qc2 b5=) 16.Qb2 f6 17.d4 c4 18.Nc3 Be8 19.Nd2 Qd4 20.Nd5 Qb2+=; B3) 15.Be5 f6 (15...Nd7 16.d4 Ne5 17.de5 Qe8 18.Qc4 b6 19.Nc3 Bb7 20.Ra1 f6=; 15...Bd7 16.d4 c4 17.Nbd2 Bb5 18.Nc4 Nc4 19.Bc4 Qd7 20.Bb5 Nb5=) 16.Bg3 Ncd5 17.Nc3 e5 18.d4 Nc3 19.Qc3 e4 20.Nd2 cd4=; C) 14...f6 C1) 15.Nc3 Nc3 (15...Bd7 16.Rd1 Qe8 17.Qb2 Qg6 18.Qb3 Rc8 19.d3 Bd6 20.Ne4 Bf8=; 15...e5 16.d4 cd4 17.ed4 Nc3 18.Bc3 e4 19.Nd2 f5 20.Nc4 Nd5=) 16.dc3 c4 17.Rd1 Qe8 18.Qb1 e5 19.Nd2 Qf7 20.Qe4 Rd8=; C2) 15.Rd1 e5 16.Nc3 Be6 17.Ne4 Qc7 18.Bb2 Rc8 19.Ba3 Qd7 20.Qc2 Bf5+=; C3) 15.d4 cd4 16.e4 d3 17.Bd3 Nf4 18.Qf4 Qd3 19.Nc3 Rd8 20.Qc1 Qc4=.

14.Nc3 A) 14...Bd7 A1) 15.Qc2 c4 (15...f6 16.Rc1 c4 17.Nd5 ed5 18.Bd4 Qc7 19.d3 Rc8 20.dc4 Nc4+=; 15...Nb4 16.Qe4 N4d5 17.Rc1 Bd6 18.Bb2 Qc7 19.Qh4 Ra8 20.Ne4 Be7=) 16.Nd5 ed5 17.d3 Bf5 18.e4 Bg6 19.Re1 Bf6 20.Ne5 Be5=; A2) 15.Qb3 Qc7 (15...Qc8 16.d3 Nb4 17.Bb2 Qe8 18.d4 cd4 19.ed4 N6d5 20.Bc4 Nb6+=; 15...Nf6 16.Qc2 Qc7 17.Ne4 Ne4 18.Qe4 f5 19.Qc2 Bd6 20.d4 c4+=) 16.Rc1 c4 17.Nd5 ed5 18.Bd4 Qd6 19.Qb1 Bf6 20.d3 Bf5=; A3) 15.Qb1 Qc7 (15...f6 16.Rc1 Qc7 17.Nd5 ed5 18.Bd4 Ra8 19.Bc5 Bc5 20.d4 Na4+/–; 15...Qb8 16.Rc1 Rc8 17.Bd3 h6 18.Bh7 Kh8 19.Nd5 ed5 20.Bf5 Qc7+=) 16.Ne4 Rc8 17.Rc1 Qd8 18.Ne5 f6 19.Nd7 Qd7 20.d3 e5=; B) 14...Nb4 B1) 15.d4 cd4 (15...c4 16.Ne5 Bd6 17.Ne4 Bb8 18.Nc5 Be5 19.de5 Qe8 20.Na4 Qb5+=) 16.Qd4 Qd4 17.Nd4 e5 18.Nf3 f6 19.Bb2 Rd8 20.Ra1 Kf7=; B2) 15.d3 Qc7 (15...Re8 16.Qd2 f6 17.Rc1 e5 18.Ne4 Qd5 19.Bb2 Rd8 20.Ba3 Na2=; 15...f6 16.d4 c4 17.Nd2 Qc7 18.Na4 N4d5 19.Nb6 Nb6 20.Qc2 Bd7+=) 16.Qd2 Bd7 17.Rc1 Ra8 18.d4 c4 19.e4 Ra5 20.Ne5 Be8=; B3) 15.Qb1 Bd7 (15...c4 16.Ne5 Qc7 17.d4 f6 18.Nf3 Qd7 19.Nd2 Qc7 20.Rc1 Bd7+=; 15...Qc7 16.Rc1 Rd8 17.Ne4 c4 18.d3 f5 19.Ned2 Bd7 20.Be5 Qc5+–) 16.Rc1 c4 17.Bb2 f6 18.Ba3 N4d5 19.Be7 Qe7 20.d3 Rc8+=; C) 14...Re8 C1) 15.Qc1 Qc7 (15...Nf6 16.Rd1 Bd6 17.e4 e5 18.Bb2 Be6 19.Qc2 Qd7 20.Ng5 Bg4=; 15...Nb4 16.Qb2 Bf8 17.Nb1 f6 18.d4 cd4 19.Qd4 Nc2 20.Qb2 Na1=) 16.Ne4 f6 17.d4 c4 18.Nfd2 Bd7 19.Nc4 Rc8 20.Nc5 Bc5–/+; C2) 15.Ne4 f5 (15...Nb4 16.d4 c4 17.Qb1 Qd7 18.Rc1 Qb5 19.Ned2 Qa6 20.Ne5 N6d5+=; 15...Nd7 16.d4 b6 17.dc5 Nc5 18.Nc5 Bc5 19.Qc2 Bb7 20.Rd1 Qe7=) 16.Nc3 Bd7 17.Ne5 Qc7 18.d4 c4 19.Bh5 Rf8 20.Qb1 Bd6=; C3) 15.d4 c4 (15...Nc3 16.Bc3 Nd5 17.Bb2 Qb6 18.Qa1 f6 19.Rc1 Rd8 20.Qb1 Bd6+=; 15...Nf6 16.Na4 Na4 17.Qa4 Nd5 18.Rd1 cd4 19.Bd4 Bd6 20.e4 e5+/–) 16.Ne5 Bd7 17.Qc2 Qc7 18.Bh5 Rf8 19.Bf7 Rf7 20.Nf7 Nc3+=; D) 14...f6 D1) 15.Qb3 Qc7 (15...Nc3 16.dc3 Bd6 17.c4 Qe7 18.Rd1 e5 19.e4 Be6 20.Bc3 Ra8=; 15...Qd7 16.d4 cd4 17.Nd4 Bd6 18.Nd5 Nd5 19.Bf3 Qf7 20.Nf5 Bc5+=) 16.d3 Bd7 17.Bb2 Nc3 18.Bc3 Nd5 19.Bd2 Ra8 20.Rc1 Qb6=; D2) 15.Nd5 Qd5 (15...ed5 16.Qc2 Qe8 17.Bc3 Bd7 18.Rb1 Bd6 19.Ba5 Nc8 20.d4 c4=) 16.Qc2 Bd7 17.e4 Qd6 18.Bc3 e5 19.Ra1 Be6 20.Ba5 Ra8=; D3) 15.d4 c4 (15...cd4 16.Qd4 e5 17.Qe4 Be6 18.Rd1 Qd6 19.Bd3 g6 20.Nd5 Bd5=; 15...Qd7 16.dc5 Bc5 17.Ne4 Be7 18.Qc2 e5 19.Rd1 Rd8 20.Nc3 Qc7=) 16.e4 Nf4 17.Qd2 Qd6 18.Re1 Bd7 19.e5 Ne2 20.Qe2 Qc7=.

14.d4 c4 15.Qc2 (15.Ne5 Bd6 (15...Bd7 16.e4 Nf4 17.Nc3 Qc7 18.Bg4 Bd6 19.Nd7 Qd7 20.d5 Qc7=; 15...Qc7 16.Qc1 Bd7 17.e4 Ra8 18.Bb2 Nf6 19.Nc3 Bb4 20.Qe3 Bc3= –0.09) 16.Qc1 Qc7 17.f4 Bd7 18.e4 Nf4 19.Rf4 f6 20.Nd2 fe5–/+; 15.Qc1 Bd7 (15...Qc7 16.Ne5 Bd7 17.e4 Ra8 18.Bb2 Nf6 19.Nc3 Ra5 20.Nd7 Qd7=; 15...Nc7 16.Bc3 Qd6 17.Ba5 Bd7 18.Nc3 Nbd5 19.Ne4 Qa3 20.Qa3 Ba3+=) 16.e4 Nc7 17.Nbd2 Bb5 18.Nc4 f5 19.ef5 Rf5 20.Nfe5 Nc4=; 15.e4 Nf4 (15...Nc7 16.Nc3 Bd7 17.Qb1 Qe8 18.Ne5 Bb5 19.Qb2 f6 20.Nb5 Qb5+=) 16.Nc3 Qd6 17.Ne5 Rd8 18.Nc4 Nc4 19.Bc4 Qd4 20.Qb3 Bc5=) 15...Bd7 (15...Qc7 16.Ne5 Bd7 17.Nc3 Bd6 18.Rb1 Ra8 19.Bf3 Ra5 20.Be4 Nf6=; 15...Nb4 16.Qc1 Bd7 17.Bc4 Qa8 18.Bc3 Na2 19.Ba2 Qa2 20.e4 Bb5=) 16.Bc4 (16.e4 Nb4 17.Qc3 Qc7 18.d5 f6 19.de6 Be6 20.Nd4 Bf7=) 16...Qc7 (16...Nc4 17.Qc4 Qa5 18.Bc3 Bb5 19.Rc1 Bc4 20.Ba5 b5+=) 17.Bd3 (17.Nbd2 Bb5 18.Rc1 Nc4 19.Nc4 Rc8 20.Nfe5 Nb6–+) 17...Qc2 18.Bc2 Bb5 (18...Ra8 19.Nbd2 Bb5 20.Rb1 Ra2=) 19.Rc1 g6 (19...Ra8 20.Nbd2 Be2+=) 20.e4 (20.Nc3 Nc3=) 20...Nf4 21.Bd1 Nc4 22.g3 Ra8 23.Nc3 Nd3 24.Rb1 Na3 25.Rb3 Nc1 26.Ra3?? (better is 26.Rb2 Ba6 27.d5=) 26...Ra3–+ 27.Bb2 (27.Nb5 Ra1 28.Kg2–+) 27...Rc3! 28.Bc3 Be2 29.Bc2 Bf3 30.Bb2 Na2 31.Bb3 Nb4 32.e5 Bd5 33.Bd1 Nd3 34.Ba1 b5 35.Kf1 Bc4 36.Kg2 b4 37.Kf3 b3 38.Bc3 Bb4 39.Bb4 Nb4 40.Ke3 (40.Bb3 Bb3 41.Ke2–+) 40…b2 0–1. Kamaletdinov,Farit (1970) – Sultanov,Hajiden, Astrakhan RUS, City Ch, 2011.

14.d4 Bd7 A) 15.e4 Nf4 (15...Qa8 16.Nbd2 Nf4 17.dc5 Rc8 18.Nb3 Qa4 19.cb6 Ne2 20.Qe2 Qb3+=) 16.dc5 Bc5 17.Qd2 Ne2 18.Qe2 Qe8 19.Qc2 Qe7 20.Qd3 Rc8=; B) 15.dc5 Bc5 16.Qd3 Qe7 17.Rd1 Ra8 18.Nc3 Ra5 19.Ne5 Bd6 20.Nd7 Qd7+=.

14.d4 f6 A) 15.Qb3 cd4 (15...Bd7 16.Nc3 cd4 17.Nd5 Nd5 18.Bd4 Be8 19.e4 Nf4 20.Bc4 Bf7+/–; 15...Bd6 16.dc5 Bc5 17.Rd1 Qc7 18.Rc1 Qe7 19.Qc2 Bd6 20.e4 Nf4+=) 16.Bd4 Qc7 17.Rd1 Rd8 18.Bd3 Kh8 19.Be4 e5 20.Bb6 Nb6=; B) 15.Qc2 cd4 (15...Nb4 16.Qb3 Qd5 17.Qd5 N6d5 18.dc5 Bc5 19.Rd1 Kf7 20.Nc3 Nc3+=) 16.Bd4 e5 17.Bb6 Qb6 18.Bc4 Be6 19.Rd1 Rd8 20.Qe4 Kh8=; C) 15.dc5 Bc5 16.Qb3 Qe7 17.Rd1 Bd7 18.Bd4 Rc8 19.Nc3 Bd4 20.Nd5 Nd5+=.

14.d4 Bf6 A) 15.Qd2 cd4 (15...Nd7 16.e4 Nc7 17.Rd1 b6 18.dc5 Nc5 19.Qc1 Qe8 20.Bf6 gf6+/–; 15...Nc7 16.dc5 Ba1 17.Qa5 Nd7 18.Qa1 Nc5 19.Rd1 Qe7 20.Qe5 b6+=) 16.Bd4 Re8 17.Rd1 Bd4 18.Qd4 Qc7 19.Qe4 Rd8 20.Qh4 Rd7+=; B) 15.Nc3 c4 (15...Nc3 16.Bc3 Nd5 17.Ba1 cd4 18.Bd4 Nc3 19.Bc3 Bc3 20.Qc2 Qf6+=; 15...cd4 16.Nd5 Qd5 17.Bd4 Bd4 18.Qd4 Qd4 19.ed4 Bd7 20.Ra1 Rc8+=) 16.Qc2 Bd7 17.Rb1 Qc7 18.Ne4 Be7 19.Ne5 Nb4 20.Qd2 Ra8=; C) 15.Qc2 cd4 16.Nd4 Qd6 17.Qe4 Rd8 18.Rd1 Qb4 19.Nd2 e5 20.N4f3 Bg4+=.

9.0–0 Qc7

10.Na3 a5 11.Rb1 A) 11...Bd6 12.d4 (12.d3 d4 13.b6 Qb8 14.ed4 cd4 15.Nb5 e5 16.Nd6 Qd6 17.Qb3 Nc5= –0.) 12...cd4 13.Qd4 e5 14.Qh4 Nb6 15.cd5 Nfd5 16.Nc4 Nc4 17.Bc4 Nf6+=; B) 11...Rd8 12.cd5 (12.d3 Bd6 13.cd5 ed5 14.Rc1 Re8 15.Qc2 Rb8 16.Rfd1 Qd8 17.Bc3 Qb6=) 12...ed5 13.d3 Bd6 14.Rc1 Re8 15.Qc2 Rb8 16.Rfd1 Qd8 17.Bc3 Qb6=.

10.Na3 a5 11.Rc1 A) 11...b6 12.d4 (12.cd5 ed5 13.d3 Re8 14.d4 c4 15.Nb1 Ne4 16.Nc3 Ndf6 17.Ne4 Ne4=) 12...Bb7 13.dc5 Nc5 14.Be5 Qd8 15.cd5 Nd5 16.Nd4 Rc8 17.Nc4 f6=; B) 11...e5 12.d4 (12.d3 d4 13.Qc2 Nb6 14.Rce1 Bf5 15.e4 Bg4 16.Ng5 Bd7 17.Bc1 h6=+) 12...e4 13.Nd2 cd4 14.cd5 Qb8 15.Bc4 Ne5 16.h3 de3 17.fe3 Rd8=.

10.Na3 a5 11.Qc2 A) 11...Rd8 12.d3 (12.cd5 ed5 13.Rac1 Bd6 14.Rfe1 Re8 15.Nb1 Rb8 16.d3 b6 17.Nbd2 Ng4=) 12...Bd6 13.cd5 ed5 14.Rac1 Re8 15.Rfd1 Rb8 16.Bc3 Ng4 17.h3 Ngf6+=; B) 11...Bd6 12.d3 (12.Rab1 d4 13.b6 Qb8 14.ed4 cd4 15.Nb5 e5 16.Rfc1 Nc5 17.Re1 Re8=) 12...Rb8 13.Rfe1 Rd8 14.cd5 ed5 15.h3 Re8 16.Rac1 Qb6 17.Bc3 Bc7=.

10.Na3 a5 11.d3 b6 (11...Bd6 12.Qc2 (12.Qb3 Re8 13.Rac1 b6 14.cd5 ed5 15.Qc2 Bb7 16.Rfd1 Rac8 17.Qd2 Qb8= –0.) 12...Rb8 13.Rfe1 Rd8 14.cd5 ed5 15.Rac1 Re8 16.Qd2 b6 17.Rc2 Ng4=; 11...Re8 12.Rc1 (12.Rb1 Bd6 13.d4 cd4 14.Qd4 e5 15.Qh4 d4 16.ed4 ed4 17.Bd3 Nc5=+) 12...e5 13.cd5 Nd5 14.Nc4 Bf6 15.Nfd2 b6 16.Ne4 Rd8 17.Bg4 Nf8+–) 12.Rc1 (12.Qc2 Bb7 13.Rac1 Rad8 14.cd5 Bd5 15.e4 Bb7 16.Nc4 Rfe8 17.Nfe5 Rf8+=) 12...Bb7 13.Nb1 (13.cd5 Nd5 14.Nc4 Rad8 15.Re1 Bf6 16.Bf6 N5f6 17.d4 Ng4=) 13...Rad8 (13...dc4 14.d4 Rfd8 15.Bc4 Rac8 16.Nbd2 Bd6 17.dc5 Nc5=) 14.Nbd2 (14.cd5 Bd5 15.Nbd2 Bd6 16.e4 Bb7 17.Qc2 Ng4=) 14...Ng4 (14...Bd6 15.cd5 Bd5 16.e4 Bb7 17.Qc2 Ng4=) 15.h3 (15.cd5 Bd5 16.e4 Bb7 17.h3 Ngf6=) 15...Nge5 (15...Ngf6 16.cd5 Bd5 17.Qc2 e5=) 16.Ne5 (16.cd5 Nf3 17.Bf3 ed5=) 16...Ne5 17.Nf3 (17.cd5 Rd5=) 17...Ng6 (17...d4=) 18.Qc2 e5 Black prepares d4 19.e4 d4 20.Nh2 Bg5 21.Rce1 Bc8 22.Bc1 Bf4 23.Bf4 Nf4 24.Bg4 Ne6 25.Qd2 g6 26.g3 (26.Be6 Be6 (worse 26...fe6 27.Qg5+–) 27.f4 ef4 28.Rf4 f5=) 26...f5 (26...h5 27.Be6 Be6 28.g4=) 27.Bf3 (27.ef5!? gf5 28.Bf3=) 27...f4=+ 28.Bg2 Ng5 29.h4 Nh3 30.Kh1 g5?? (30...Qe7 31.Nf3=+) 31.Nf3?? (better 31.g4 Nf2 32.Qf2+–) 31...g4=+ 32.Bh3 gh3 (32...gf3 33.Kh2=+) 33.Kh2 Bg4 34.Ng1 Qd7 35.Rb1 (35.f3!? Be6 36.gf4 ef4 37.Ne2=) 35...Rf7 36.Qe1 Rdf8 37.Rb2? (better 37.f3=+) 37…fg3–+ (37...fg3 38.Kg3 Rf3 39.Kh2 Rd3–+) 0–1. algernon (2565) – sbeaulieu (2500), net–chess.com, 2014.

10.Na3 a5 11.d4 A) 11...Qd6 12.cd5 (12.dc5 Nc5 13.cd5 Nd5 14.Nc4 Qc7 15.Be5 Qd7 16.Rc1 Rd8 17.Bd4 Qe8+=) 12...Qd5 13.Qc2 cd4 14.Nd4 Qe4 15.Bd3 Qh4 16.Nf3 Qh5 17.Rad1 Rd8+=; B) 11...cd4 12.Bd4 (12.Nd4 Bd6 13.Nf3 e5 14.h3 e4 15.Nd4 Nc5 16.Rc1 Rd8 17.cd5 Nd5=) 12...Ba3 13.Bf6 Bb4 14.Bb2 dc4 15.Rc1 Nb6 16.Qd4 e5 17.Ne5 Bc5+=.

10.Qb3 ab5 11.ab5 Ra1 12.Ba1 dc4 13.Bc4 Nb6 14.Be2 Nbd5 (14...c4 15.Qc2=) 15.d3 (15.d4 Rd8=) 15...Bd7 16.Rc1 (16.Be5 Bd6 17.Bd6 Qd6=) 16...Ra8 (16...Qa5 17.Bf6 Bf6 18.Rc5=) 17.Na3 (17.Be5 Qb6 18.d4 Rc8=) 17...b6 (17...Qa5 18.Bb2=+) 18.Bb2 (18.d4 Ra5=) 18...Qb7 (18...Ra5 19.d4=) 19.Ne5+= Ra5 Attacking the isolated pawn on b5 20.Nec4 Ra7 21.Bf3 Qb8 (21...Be8 22.d4+=) 22.Be5 Qd8 23.g3 (23.d4 cd4 24.Bd4 Qc8+–) 23...Be8 (23...Bc8 24.e4 Nb4 25.d4=) 24.Rd1 Rd7 (24...Nd7 25.Bb2+=) 25.Nc2 Ra7 26.d4 cd4 (26...Nd7 27.e4 Nc7 28.Bf4+–) 27.Bd4 (better 27.e4 Ne4 28.Be4+–) 27...Qd7?? (better 27...Rd7+–) 28.Nb6+– (28.Bb6 Rb7 29.e4 Qb5 30.Qb5 Bb5 31.ed5 Bc4+–) 28...Qc7 (28...Qb7 29.Nd5 Nd5 30.Ba7 Qa7 31.Bd5 ed5 32.Rd5+–) 29.Nd5 (worse 29.Bd5 ed5 30.Nd5 Nd5 31.Ba7 Nf6+–) 29...Nd5 30.Ba7 (better 30.Bd5!? Ra5 31.b6 Qb8+–) 30...Qa7 31.Bd5 ed5 32.Qd5 (32.Rd5!? Qb7+–) 32...Qa4 33.b6 Bc6 34.Qd3 Be4 35.Qd8 Bf8 36.Ne1 (36.Rc1 Qc6 37.Qc7 Qa8+–) 36...Bb7 37.Qd4 (37.Rd7 Bc6 38.Rd4 Qa5+–) 37...Qc6 38.f3 h6 (38...Qb5 39.Qd8+–) 39.Kg2 (39.Qd8 Qc3 40.Kf2 f5+–) 39...Bc5 40.Qd8 Kh7 41.Qc7 (better 41.Qd3 Kg8 42.Qc4 Bb6 43.Qc6 Bc6 44.Rd6+–) 41...Bb4 (41...Bb6 42.Qc6 Bc6+–) 42.Qc6 (42.Qf7 Be1 43.Qf5 Qg6 44.Qg6 Kg6 45.Re1 Kf6+–) 42...Bc6 43.Nd3 (better 43.e4 f6+–) 43...Ba5 (43...Bd6 44.Rc1 Bb5 45.Nc5+–) 44.Rb1 Bb7 (44...g5 45.e4 Bb7 46.Rb5+–) 45.Nc5 Bc6 46.b7 (46.b7 Bc7 47.b8Q Bb8 48.Rb8+–) 1–0. Khakimzianov,Rinat – Shafikova,Gulnaz, Ufa Cup, 2007.

10.Qc2 ab5 11.ab5 Ra1 12.Ba1=.

10.Qc2 b6 11.Nc3 (11.cd5 ed5 12.Nc3 Re8=) 11...a5 (11...dc4 12.ba6 Ba6 13.Nb5=) 12.cd5 ed5 13.Ng5 (better is 13.d4=) 13...Ne5?? (better is 13...Bb7=) 14.Nd5!!+– Ne4 (14...Nd5 Deflection from h7 15.Qh7 A classical mating theme) 15.Nc7 Ng5 16.Na8 Ng6 17.Nb6 Bb7 18.f4 Ne4 19.Bf3 (19.f5 Nh4 20.Rf4 Bd8 21.Re4 Be4 22.Qe4 Bb6 23.Qh4 Bd8+–) 19...Nd6 20.Bb7 Nb7 21.f5 (21.f5 Nh4 22.Qe4+–) 1–0. Myslowski,Karol – Bertoni,Ruben, Paris op–B, 1998.

10.Nc3 dc4 11.Bc4 ab5 12.Nb5 Qa5=.

7.Be2 b6

8.0–0 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Bb7 12.Qb3 Nbd7 13.Nc3 (13.d3 Qc7=) 13...Qc7 (13...dc4 14.Qc4 Bf3 15.Bf3=+) 14.Bb2 Rd8 (14...dc4 15.Qc4 Bf3 16.gf3=+) 15.Ra1 (15.cd5 Nd5 16.Ra1 Bd6=) 15...Ra8 (15...dc4!? 16.Qc4 Bf3 17.Bf3 Ne5=+) 16.Ra8= Ba8 17.Qa4 Bb7 18.Qa7 (18.cd5 Nd5 19.Nd5 Bd5=) 18...dc4=+ 19.Bc4 h6 (19...Bd6 20.Be2=+) 20.Na4 (20.d3 Bd6 21.Ne2 Nh7=) 20...Nd5 21.h3 Bf6 (21...Bd6 22.d3=) 22.Bf6 (22.Bd5 ed5 23.Bf6 gf6+–) 22...gf6 (22...N5f6 23.d3=) 23.Ne1 (better 23.Bd5 ed5 24.d4+–) 23...Ne5?? (23...Ne7 24.Nc3+=) 24.Be2?? (better 24.Bd5 ed5 25.Nb6+–) 24...f5 25.Nf3 Nf3 (better 25...Nd7!?+=) 26.Bf3+– Kf8 (better 26...Qd7 27.Qb8 Kg7 28.Qe5 Nf6 29.Qg3 Kh7 30.Nb6 Qd8+–) 27.Bd5+– ed5 28.Qb6 (28.Nb6!? Qe7+–) 28...Qb6 29.Nb6 Ke7 30.Kf1 (30.Na4 Kd6+–) 30...Kd6 (30...c4 31.Na4 Kd6 32.f4+–) 31.Na4 (31.d4 c4+–) 31...c4 32.Ke2 Ke5? (better 32...f4 33.Kf3 d4 34.Kf4 Bg2+–) 33.Nc5 Bc8 34.b6 Kd6 (34...f4 35.b7 Bb7 36.Nb7 fe3 37.fe3+–) 35.b7 Bb7 36.Nb7 Kc6 (36...Kc7 37.Nc5 Kd6+–) 37.Nd8 Kc5 38.Nf7 h5 1–0. jaddwarrior (2080) – Ainer (1700), ChessWorld.net, 2016.

8.0–0 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Nbd7 12.d3 Bb7 13.Nbd2 Qc7 14.h3 e5 (14...Ra8 15.Qc2+=) 15.Qc2 (15.cd5 Nd5 (worse is 15...Bd5 16.e4 Bb7 17.Nc4+/–) 16.Nc4 Bf6=) 15...d4 (15...Ra8 16.cd5 Nd5 17.Qb3=) 16.e4 (16.Bb2 Ra8+=) 16...g6 (16...Ra8 17.Bb2+=) 17.Nh2 (17.Bb2 Ra8+=) 17...Ra8 18.Bb2 Bc8 (18...Nf8 19.g3+=) 19.Ra1 Ra1 20.Ba1 Qa7 (20...Nf8 21.Ndf3+=) 21.Bb2 Nf8 22.Ng4 Ng4 23.Bg4 Bg4 (23...Ne6 24.Nf3 f6 25.h4=) 24.hg4 Ne6 (24...Qd7 25.Nf3 Qg4 26.Ne5=) 25.g3 (25.Nf3 Bf6=) 25...Kf8 (25...Ng5 26.Kg2=) 26.Kg2 (26.Nf3 f6=) 26…Ke8 ½–½. Yin,Zixiao (1680) – Jovanovic,Alexander (1880), Regionalliga SW, 2004.

8.0–0 a6 9.a4 Bb7 10.d4 Qc7 (10...ab5 11.ab5 Ra1 12.Ba1=) 11.Nbd2 (11.dc5 Qc5 12.Bd4 Qb4=) 11...Nbd7 12.Qb3 (12.cd5 Nd5 13.ba6 Ba6=) 12...a5 (12...ab5 13.ab5 cd4 14.Nd4=+) 13.Rac1 (13.cd5 Bd5 14.Bc4 Rac8=) 13...Rac8 14.Rfd1 (14.Qd3 Rfd8=) 14...Qb8 (14...cd4 15.Bd4 e5 16.Bb2=) 15.Ne5 (15.Qd3 cd4 16.Qd4 Nc5=) 15...cd4 16.ed4 Rfd8 17.Ndf3 (17.Bf3 Bd6 18.Qe3 dc4 19.Bb7 Qb7 20.Ndc4 Bb8=) 17...Ne5=+ 18.Ne5 Qa8 (18...dc4 19.Bc4 Qd6 20.f4=+) 19.f3 (19.Ba3 dc4 20.Nc4 Ba3 21.Qa3 A) 21...Bg2? 22.Nb6 Rc1 23.Na8 (23.Rc1?! Qe4=; 23.Qc1?! Qb7=) 23...Rd1 24.Bd1 Ba8 25.Qc3+–; B) 21...Qb8=) 19...Rc7 (19...dc4 20.Bc4 Nd5 21.Ba3=) 20.Rd2 (20.Ba3 dc4 21.Bc4 Ba3 22.Qa3 Qb8=) 20...Rdc8 (20...dc4 21.Bc4 Nd5 22.Bd3 Rc1 23.Bc1=) 21.Rdc2 dc4 22.Bc4 Nd5 23.Bd5 (23.Ba3!? Bg5 24.Re1=) 23...Bd5 24.Rc7 Rc7 (24...Bb3?? 25.Rc8 Qc8 26.Rc8 Bf8 27.Nd7+–) 25.Qe3 Qc8 26.Rc7 Qc7 27.Ba3 Bd8 28.Nc6? (better 28.h3!?–/+) 28...Bc6–+ 29.bc6 Qc6 30.Qe5 (better 30.Qb3–+) 30...f6?? (better 30...Qc3 31.Bd6 Qa1 32.Kf2 Bh4 33.g3 Bf6–+) 31.Qb8 (31.Qd6 Qd6 32.Bd6 Kf7–/+) 31...Qc7 32.Qa8 (better 32.Qc7!? Bc7 33.g3–/+) 32...Kf7–+ 33.d5 (33.h3 Qd7 34.Kh1 Qd4 35.Qb7 Ke8 36.Qc6 Qd7–+) 33...Qe5 (better 33...Qc3!? 34.g4 Qd4 (34...Qa3?! 35.Qd8 Qc5 36.Kg2–/+) 35.Kf1 Qd5 36.Qd5 ed5–+) 34.de6–/+ Qe6 35.Kf2 (35.Qe4 Qe4 36.fe4 Ke6–/+) 35...Qa2–+ 36.Ke1 (36.Kf1 Qa3 37.Qd8 Qa4 38.Qb6 Qc4 39.Kf2 a4–+) 36...Qa3 37.Qd8 Qe7 38.Qe7 Ke7 39.Kd2 Kd6 40.Kc3 Kc5 41.f4 f5 42.g3 (42.Kb3–+) 42...h6 Plans Kb3 43.h4 (43.Kb3 Kd4–+) 43...b5 (better 43...h5–+) 44.ab5 Kb5 45.h5 (45.Kd3 Kb4–+) 45…a4 0–1. Batchelor,Guy J (1845) – Haridas,Girinath (1760), E2e4. Org. uk High Wycombe U, 2013.

8.0–0 a6 9.a4 dc4 10.Bc4 ab5 11.ab5 Ra1 12.Ba1 Ne4 13.d4 Nd7 14.Qc2 Nd6 (14...Bb7 15.Bd3 Qa8 16.Nbd2 Nd2 17.Nd2 Bg2 18.Bh7 Kh8 19.Be4 Be4 20.Qe4 Qe4 21.Ne4=) 15.Bd3+= Nb7? (better 15...f5!?+=) 16.Bh7+– Kh8 17.Bd3 Bf6 18.Nbd2 Qc7 (18...cd4 19.Nd4 Bd4 20.Bd4+–) 19.Nb3 (19.Ne4 Be7+–) 19...Be7 20.Bb2 Na5 (20...Rd8 21.Ra1+–) 21.Na5 ba5 22.Be4 (22.dc5 Nc5 23.Bd4 Bb7+–) 22...Bd6 (22...Bb7+–) 23.Ba3 Rd8 24.Bc6 cd4 25.Ng5 (25.Bd6 Qd6 26.Ng5+–) 25...Bh2?? (25...Nf6 26.b6 A) 26...Bh2?? 27.Kh1 Qb6 28.Nf7 (28.Kh2?! Qc7 29.Kg1 Bb7+–) 28...Kg8 A1) 29.Kh2 Kf7 30.ed4 Qc7 31.Kg1 Bb7–/+ (31...Rd4?! 32.Rc1=); A2) 29.Nd8+–; B) 26...Qe7 27.Bd6 Rd6+–) 26.Kh1 Nf6 27.ed4 (27.b6 Qb6 28.Nf7 (28.Kh2?! Qc7 29.Kg1 Bb7+–) 28...Kg8 A) 29.Kh2 Kf7 30.ed4 Qc7 31.Kg1 Bb7–/+ (31...Rd4?! 32.Rc1=); B) 29.Nd8+–) 27...Rd4 28.Nf7 Qf7 29.Kh2 Qh5 30.Kg1 Ng4 31.Rc1 Qh2 32.Kf1 Qf4 33.Ke1 Nf2?? (better 33...Qh2 34.Ke2 Qe5 35.Kf1 Qf4=) 34.Qf2+– Qe5 35.Kf1 Rf4 36.Bf3 Qb5 37.Kg1 Bb7 (37...Rc4 38.Rd1 Qf5 39.Rd8 Kh7 40.Qe1+–) 38.g3?? (better 38.Qg3 Rf3 39.gf3+–) 38…Qg5 (38...Qg5 39.Qh2 Rh4 40.Qh4 Qh4 41.gh4 Bf3+–; 38...Rf3 39.Rc8 Kh7 40.Qc2 Rf5 41.g4 Qf1 42.Kh2 Qf4 43.Kh3 Qf3 44.Kh2 Qg4 45.Rc3–+) 0–1. Kultica – Raghavendrakarthik, playchess.de, 2002.

8.0–0 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5).

8.0–0 dc4 9.Bc4 Bb7 10.Ne1 Nbd7 11.f3 Qc7 12.Nc3 Bd6 13.g3 (13.f4 a5+=) 13...Rfd8 (13...Bg3 14.f4 Be1 15.Qe1–/+) 14.Ne2 (14.f4 h6+=) 14...Bd5 15.Bd5 Nd5 16.Ng2 (16.e4 N5f6+=) 16...Be5 17.Be5 Ne5 18.Qc2 (18.d4 cd4 19.Rc1 Qd7 20.ed4 Ng6+=) 18...Nb4 19.Qd1 (19.Qc3 Rd3 20.Qc1 Qd7–/+) 19...Nbd3 (19...Qd7 20.a3 Nbd3 21.Qb3–+) 20.Ngf4 (20.f4 Ng6–/+) 20...Nf4 21.Nf4 Nc4 22.Rf2 (22.Qc2 Nd2 23.Rf2 Qd7–+) 22...Ne3!–+ 23.Qb3 (23.de3 Rd1 Pinning (23...Rd1 Deflection)) 23...Nf5 24.Rd1 Nd4 25.Qe3 Nb5 26.Rff1 Nd4 27.Qf2 Qd7 28.Ne2 Ne2 29.Qe2 Qd4 30.Kh1 h6 31.Qg2 (31.d3 Rd5–+) 31...Rd5 32.Rf2 Rad8 33.f4 Qb2 34.a4 Qb4 35.Re2 Qa4 36.Qf1 Qc6 37.Kg1 a5 38.Qe1 b5 39.Kf2 a4 0–1. Valpa – Cantilever, playchess.de, 2003.

8.a4 a5 9.0–0 Bb7 10.d3 Nbd7 11.Nbd2 Qc7 12.Qc2 Ng4 13.h3 Nge5 14.Ne5 Ne5 15.Nf3 (15.cd5 Bd5 16.f4 Ng6+=) 15...Ng6 (15...Nf3 16.Bf3 dc4 17.Qc4 Bf3 18.gf3=+) 16.Rfd1 (16.Rac1 Rfd8=) 16...e5 (16...f5 17.cd5 ed5 18.Re1=) 17.Nd2 (better 17.cd5!? Bd5 18.d4+=) 17...d4=+ 18.e4 (18.Bf3 Nh4=+) 18...f5 (18...Nf4 19.Bf3–/+) 19.ef5=+ Rf5 (19...Nf4 20.Ne4=+) 20.Bg4= Rg5 21.Ne4 Be4 22.de4 Rf8 (22...h5 23.Be6 Kh8 24.g3=) 23.Bc1 (23.g3!?=) 23...Nf4=+ 24.Bf4 (24.Ra3 Qd6=+) 24...Rf4 (24...ef4 25.Rd3=+) 25.Ra3 h5 (25...Qb7 26.Be6 Kh8 27.Bd5=+) 26.Be6= Kh7 (26...Kh8 27.g3=) 27.Rdd3 (27.g3 h4=) 27...Qd6=+ (27...Re4?? 28.Rf3 Kh6 29.Qe4+–) 28.Bd5 h4 29.Kh2 Qg6 (29...Qf6 30.Rf3=+) 30.g3= hg3 31.Rg3 (31.fg3!? Rf6 32.Rf3=) 31...Qh6 32.Rg5 (32.Qe2!?–/+) 32...Bg5–+ 33.Qe2 Rh4 (33...Rf6 34.Rf3 Bf4 35.Kh1–+) 34.Qf3 Bf4 35.Kg2 (35.Kg1 Rh5–/+) 35...g5 (35...Rh5 36.Bf7 Rg5 37.Kf1–/+) 36.Kf1 (36.Kg1 Kg7–/+) 36...Kg7 (36...g4 37.Qg2 (37.hg4?? Rh1 38.Ke2 Qh2–+) 37...Bg3 38.Qg3 (38.fg3?? Rh3 39.Ke2 Rh2 40.Qh2 Qh2 41.Kd1 Kh6–+; 38.Rg3?? Qc1 39.Ke2 Qc2 40.Ke1 d3 41.Rd3 Qd3–+) 38...Qc1 39.Kg2 Rh3 40.Qh3 gh3 41.Rh3 Kg7 42.Rg3 Kf6 43.Rf3 Ke7 44.Bg8–+) 37.Ke2 (37.Qg2 g4!–/+) 37...Kf6 (37...g4 38.Qg2–/+) 38.Rd3 (38.Qg2 Ke7–/+) 38...g4 39.hg4 Kg5 40.Rd1? (better 40.Rb3!?–/+) 40...Rh3–+ 41.Qg2 Qh4 42.Rd3? (better 42.Be6–+) 42...Be3! 43.Kd1 (43.fe3 Rg3) 43...Rh1 44.Kc2 (44.Ke2 Rh2 45.Qh2 Qh2 46.Re3 de3 47.Ke3 Qf4 48.Ke2 Qg4 49.Ke3–+) 44...Rh2 45.Qg1 Rf2 (45...Rf2 46.Kb3 Rb2 47.Kb2 Bg1 48.Bf7 Be3 49.Be6 Qf2 50.Kb1 Qf1 51.Ka2 Qd3 52.Kb2 Qc3 53.Ka2 Bc1 54.Kb1 Qb2) 0–1. Melich,Jindrich (2160) – Kuba,Stanislav (2300), Klatovy op–A, 1999.

8.d4 dc4 9.Bc4 Bb7 10.0–0 Qc7 11.Nbd2 Rd8 12.Rc1 Nbd7 13.Qe2 Ne4 14.Ne4 Be4 15.Rfd1 Nf6 16.Ng5 Bb7? (better is 16...Bg6+=) 17.Be6!+– Bd6? (17...fe6 18.Ne6) 18.Nf7 Bh2 19.Kh1 Re8 20.Ng5 Kh8 (20...Kf8 21.Bf7 Bd6+–) 21.dc5 bc5 (21...Re7 22.cb6 Qb6 23.Bd4+–) 22.Bf6 gf6 23.Nf7 Kg7 24.Rd7 1–0. pcmvr – spock1, ChessWorld.net, 2002.

8.Ne5 Bb7 9.0–0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.Ne5).

8.0–0 Nbd7

9.Qc2 Bb7 10.d3 Rc8 11.Nbd2 Qc7 12.a4 Rfd8 13.Rfd1 h6 (13...Bd6 14.a5=) 14.Bc3 White prepares a5 14...Bd6 15.h3 Be7 16.Qb2 Bd6 17.a5 Be7 (17...e5 18.cd5 Nd5 19.Nc4 Nc3 20.Qc3+=) 18.ab6 ab6 (18...Qb6? 19.Ba5 Qd6 20.Bd8 Bd8 21.Ra7+–) 19.Ra7 Ra8 20.Rda1 Ra7 21.Ra7 Ra8 22.Qa1 Qb8 23.Ra8 Ba8 (23...Qa8 24.Qa8 Ba8 25.Ne5=) 24.Ne5+= Ne5 25.Be5 Qb7 26.Bf3 Bd8 (26...Qc8 27.Qa2+=) 27.Nf1 (27.e4!?+–) 27...Ne8 28.Ng3 Bf6 29.Nh5 (29.Bf6 Nf6 30.e4 Qc8+=) 29...Be5= 30.Qe5 Qd7?? (30...Qc7 31.Qb2=) 31.Qb8?? (better 31.Qg7! Ng7 32.Nf6 Kh8 33.Nd7 dc4 34.dc4 (34.Ba8? c3–+) 34...Bf3 35.gf3+–) 31...Bb7+= 32.Nf4 Qc8 33.Qc8 Bc8 34.cd5 (34.Bd5 ed5 35.Nd5+=) 34...Nc7 (better 34...e5!? 35.Ne2 Nd6=) 35.de6+– fe6 36.Bc6 Kf7 37.Kf1 g5 38.Ne2 Kf6 (better 38...Ke7!?+–) 39.Nc3+– e5 (39...Ke7 40.Na4 Bd7 41.Bd7 Kd7 42.Nb6 Ke7 43.Nc8 Kd7 44.Na7+–) 40.Na4 Bf5 41.Ke2 e4 (41...Ke7 42.Nb6 Be6 43.f3+–) 42.de4 (42.Nb6?! ed3 43.Kd2 Ke7+–; 42.Be4?! Nb5 43.Bf5 Kf5 44.g4 Ke5 45.Nb6 Kd6+–) 42...Be6 43.Nb6 g4 (43...Ke5 44.Kd3+–) 44.hg4 Bg4 45.f3 Be6 46.Nd7 (better 46.Nd5!? Bd5 47.ed5 c4+–) 46...Ke7 47.Nc5 (47.Ne5!? Kd6 48.f4 c4+–) 47...Bc4 48.Kf2 Nb5 (48...Bb5 49.Bb5 Nb5 50.f4+–) 49.Bb5 Bb5 50.Nb3 (50.e5 h5+–) 50...Kf6 51.f4 Bd3 52.Kf3 Bc2 (52...Kf7 53.e5+–) 53.Nd4 White intends f5 53...Bd1 54.Kg3 h5 (54...Kf7 55.e5+–) 55.e5 Ke7 56.f5 White prepares the advance e6 56...Bg4 57.Kf4 Kf7 58.g3 Ke7 (58...Kg7 59.Kg5 Bf5 60.Nf5 Kf7 61.Nd4+–) 59.e4 (59.f6!? Kf7 60.Kg5 h4 61.gh4 Bd7+–) 59...Kf7 60.e6 (60.e6 Ke7 61.Kg5+–) 1–0. Fischbach,Rainer (1660) – Fuchs,Maria, Leipzig VfB op, 2004.

9.Nc3 a5 10.cd5 (10.d3 Bb7=) 10...Nd5 (10...ed5 11.Qc2=) 11.Na4 (11.Nd5 ed5 12.Qc2 Re8=) 11...Bb7 12.d3 (12.d4 Bf6=) 12...Rb8 (12...Bf6 13.Qc2=) 13.g3 (13.a3 Bf6=) 13...Nc7 (13...Rc8 14.Rc1+=) 14.d4 (14.Nc3 Bf6 15.Qc2 Nd5+=) 14...Bf3 15.Bf3 Nb5 16.Bc6 (16.dc5 Nc5 (16...Bc5?! 17.Bc6 Nd6 18.Nc5 Nc5 19.Be5+=) 17.Nc5 bc5+=) 16...Nd6 (16...Na7 17.Bg2–/+) 17.Bd7 Qd7 18.dc5 bc5 19.Ba3 (19.Rc1 Rfc8 20.Rc5 Rc5 21.Nc5 Qb5–/+) 19...Qc6 (better is 19...c4!?–+) 20.Bc5+= Opening the c–file gets White a lot of play 20...Rfd8 Threatens Nf5 21.Rc1 Qb5 (21...Qe8 22.Bb6 Rdc8 23.Rc8 Rc8 24.Bc5+=) 22.Rb1 Qc6 (22...Qa6 23.Rb8 Rb8 24.Qg4+=) 23.Rc1 Qb5 (23...Qe8 24.Bb6 Rdc8 25.Rc8 Rc8 26.Bc5+=) 24.Rb1 Qc6 (24...Qa6 25.Qg4+=) 25.Bb6 (25.Rc1 Qe8+=) 25...Re8 (25...Rdc8 26.Rc1 Qe8 27.Rc8 Rc8 28.Bc5+=) 26.Rc1 Qb5 (26...Nc4 27.Bc5 Rbd8 28.Qg4+=) 27.Bc7 (27.Rc5 Qa6 28.Ra5 Qc4=) 27...Rbc8 (27...Rb7 28.Rc5 Qa6 29.Ra5=) 28.Rc5 Qa6 29.Qc2?? The isolani on a5 becomes a target (29.Ra5 Qc6 30.Bd6 Bd6 31.Qd4=) 29...Nb7?? (better is 29...Nb5 30.Rc6 A) 30...Rc7?! 31.Rc7 (31.Ra6?? Rc2 32.Ra5 Nd6–+) 31...Nc7 32.Qc7+=; B) 30...Qb7–+) 30.Rc6= Qb5?? (better is 30...Qa7=) 31.Rb1+– Bb4 32.a3! Nd8 (32...Ba3 Exploits the pin 33.Rb5) 33.Rc5! Qd7 (33...Qc5 34.Nc5) 34.ab4 Nb7 (34...Qe7 35.Nb6 Nb7 36.Nc8 Rc8 37.Bd6 Nc5 38.Be7 ab4 39.Rb4+–) 35.Nb6 (35.Nb6 Nc5 36.Nd7 (36.Qc5?! Qc7 37.Nc8 Qc5 38.bc5 Rc8=) 36...Nd7 37.ba5+–) 1–0. Bulcourf,Carlos – Panzeri, Buenos Aires, 1980.

9.Nc3 Bb7 10.d4 cd4 11.Qd4 Bc5 12.Qf4 Qb8 13.Qb8 ½–½. marekt – RWO, ChessWorld.net, 2012.

9.Nc3 dc4 10.Bc4 Bb7 11.d4=.

9.Nc3 Qc7 10.Rc1 Bd6 11.g3 Bb7 12.d4 Rae8 13.Qd2 (better 13.Nd2=) 13...Nh5?? (better 13...dc4!? 14.e4 Rd8=+) 14.Ne5 (better 14.cd5 Nhf6 15.e4+–) 14...f6?? (better 14...Nhf6 15.Nd7 Qd7 16.dc5 bc5+=) 15.Bh5 (15.Nd7 Ng3 16.hg3 Qd7 17.cd5 ed5 18.dc5 Bc5+–) 15...g6? (15...fe5 16.Be8 Re8 17.cd5 ed4 18.ed4 Nf6 19.de6 Re6+–) 16.Nd7 Qd7 17.Bf3 e5 (17...dc4 18.Bb7 Qb7 19.dc5 Bc5 20.Qe2+–) 18.Bd5 Bd5 19.Nd5 Qh3 (19...Qf5 20.de5 Be5 21.Be5 Qe5 22.Rfd1+–) 20.Rcd1 (better 20.Ba3+–) 20...e4 (20...Qf5+–) 21.dc5 Bc5 (21...Be5 22.cb6 ab6 23.Nb6+–) 22.Nf6 Kh8 (22...Rf6 23.Bf6 Qe6+–) 23.Ne8 Kg8 24.Qd5 (24.Qd5 Rf7 25.Nf6 Kg7 26.Ne4 Kg8 27.Qe5 Qh2 28.Kh2 Rf6 29.Nf6 Kf8 30.Rd7 Be3 31.Qe7) 1–0. Pavlov,Oleg – Mirgorodskaya,Olga, Krasnoyarsk Russia, City Championship, 2016.

9.d4 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.d4 Nbd7).

9.d4 dc4 10.Bc4 cd4 11.Nd4 (11.Qd4 Bb7=) 11...Bb7 12.Nd2 (12.Nc6 Bc6 13.bc6 Nc5=) 12...Nc5 13.Qc2 (13.Rc1 Rc8=) 13...Rc8 14.N4f3 (14.Rac1 Bd6=) 14...a6 (14...Bd6 15.Rfd1+=) 15.Rfd1 (15.a4 Qc7=) 15...ab5+= 16.Bb5 Bd5 (16...Qd5 17.Nc4 Qh5 18.Qe2= (18.Nb6 Rb8 19.Nd2 Ba8–+)) 17.Nc4 Qc7 18.Rac1 Bf3 (18...Nfe4 19.Qe2=) 19.gf3+= Rfd8 20.a4 (20.Be5 Qb7=) 20...Rd1 (20...Qb7 21.e4+=) 21.Rd1+= Nfd7 22.f4 Rd8 (22...Nf6 23.f3+=) 23.f5 (23.Bc3 Nf6+=) 23...ef5 (23...Bf6 24.fe6 fe6 25.Bd4+=) 24.Qf5 Nf8 25.Rd8 (withdraw, 1–0). Schirmer,Michael – Chatterjee, email 4AMM–F, 1998.

7.Be2 dc4

8.0–0 Bd7 9.a4 a6 10.Bc4 ab5 11.ab5 Ra1 12.Ba1 Qe8 13.Nc3+– b6 (13...Bc8 14.d4+–) 14.Qc2 (14.d4 Bc8+–) 14...Bc8 15.Ne4 Ne4 16.Qe4 Nd7 17.Bd3 Nf6?? (better 17...g6+–) 18.Bf6+– (18.Bf6 g6 19.Bc3+–) 1–0. DEFFM – GuestDHGF, freechess.org, 2019.

8.0–0 Nbd7 9.a4 b6 10.Bc4 Bb7 11.d3 Bf3 (11...a6 12.Na3=) 12.Qf3 e5 (12...Bd6!?=) 13.Nd2 Ne8 (13...Bd6 14.Rfd1+–) 14.Bd5 Rb8 15.Nc4 1–0. DEFFM – juliaaaaaa, freechess.org, 2018.

8.Bc4 a6 9.Na3=.

8.Bc4 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 Bd7 12.0–0 Nd5 13.Ne5 Qa5 Attacking the isolated pawn on b5 (13...Bf6!?=) 14.Nd7+– Nd7 15.Bd5 ed5 16.Bg7! Kg7? (better 16...Rd8 17.Bc3 Qb5 18.Qg4 Kf8+–) 17.Qg4+– Kh8 (17...Kf6 18.Qd7 Rd8 19.Qb7+–) 18.Qd7 Bf6 19.Qb7 d4 20.Qc6 (20.Rc1 Qa2 21.Qc6 Kg7 22.Qc5 Qb2+–) 20...Bg7 (20...Kg7 21.Qc5 Rb8 22.Na3+–) 21.b6 (better 21.Qc5!? Rb8 22.Na3 Qd2+–) 21...Rb8 22.b7 Qb4?? (better 22...Qa7 23.Na3! Bf8 24.Qf6 Kg8+–) 23.Qc8 (23.Qc8 Bf8 24.Qb8+–) 1–0. GuestKWJN – Xekmat, freechess.org, 2018.

8.Bc4 Nd5 9.d4 Bf6 (9...cd4 10.Bd4 a6 11.Nc3=) 10.0–0 cd4 (10...Nd7 11.Qc2=) 11.Bd4+= Bd4 (11...Nb6 12.Bd3+=) 12.Qd4 Nb4 (12...Nb6 13.Rd1 Qd4 14.Rd4 (14.ed4? Nc4 15.Rc1 Nd6–+) 14...Nc4 15.Rc4=) 13.Qb2 (13.Qd8 Rd8 14.a3 Nd5+–) 13...Nd5 (13...Qe7 14.a3 Nd5 15.Bd5 ed5 16.Nc3+=) 14.Rd1 Qf6 15.Nd4 (15.Qf6 Nf6 16.Nc3 Bd7+–) 15...Nd7 (15...Nb6 16.Bd3+=) 16.Bd5 ed5 17.Nc3 (17.Nd2 Ne5 18.Qb3 Be6+=) 17...Nb6 18.Qb3 (18.Qe2 Be6+=) 18...Be6 19.Rac1 Rfd8 20.a4 Nc4 (20...Rac8 21.a5 Nc4 22.Qb4= (worse 22.Ne6 fe6 23.Qb4 Qf8 24.Qf8 Kf8=+)) 21.e4 de4 22.Ne4 Qf4 (22...Qg6 23.Ne6 Rd1 24.Qd1 Qe4 25.Nc5+–) 23.Ne6 Rd1 24.Qd1 Qe4 25.Nc5 Qf4 26.g3 (26.g3 Qd6 27.Qd6 Nd6 28.Rd1+–) 1–0. DEFFM – gyperborean, freechess.org, 2018.

8.Bc4 Ne4 9.Qc2 Nd6 (9...Ng5 10.Ng5 Bg5 11.0–0+=) 10.Be2 (10.Bd3 f5+=) 10...Nd7 (10...a6 11.Qc5 Nb5 12.Qh5=) 11.a4 (11.0–0 a6=) 11...Nf6 (11...b6 12.0–0=) 12.Nc3 (12.Qc5 a6+=) 12...a6 (12...Nf5 13.0–0+=) 13.0–0 ab5 (13...b6 14.e4 Nd7 15.d4+=) 14.ab5 Ra1 15.Ra1 b6 16.Ne5 (16.e4 Nd7+=) 16...Bb7 17.Ra7 (17.Nc6 Qc7+=) 17...Qb8= 18.Qa4 (18.Ra4=) 18...Nf5?? (better 18...Nc8 19.Rb7 Qb7–/+) 19.Nc6+– Bc6 20.bc6 Rc8?? (20...Qd8 21.d3+–) 21.Bf3 (better 21.c7 Rc7 22.Ra8+–) 21...Rc7?? (21...Qd6 22.Qa6 Re8 23.Nb1+– (worse 23.Qb6 Qd2 24.Ra1 Bd8+=)) 22.Rb7 (better 22.Ra8 Qe8 23.Re8 Ne8 24.Nb5+–) 22...Qc8? (better 22...Rb7 23.cb7 Bd6+–) 23.Rc7 Qc7 24.Qa8 Bf8?? (24...Qd8 25.c7 Qa8 26.Ba8 Nd6+–) 25.Nb5 (25.Nb5 Qe7 26.c7+–) 1–0. DEFFM – GuestXXXXX, freechess.org, 2016.

8.Bc4 Ne4 9.Nc3 Bf6 (9...Nd6 10.Be2+=) 10.Qc2 (10.Ne4 Bb2 11.Rb1 Bf6+=) 10...Nc3 (10...Nd6 11.Bd3 a6 12.Rb1+=) 11.dc3 (11.Bc3 a6+=) 11...Nd7 12.Rd1 (12.0–0 g6+=) 12...Qc7 13.0–0 (13.h4 Rd8+=) 13...Ne5 (13...a6 14.ba6 ba6 15.Bd3=) 14.Be2 (14.Ne5 Be5 15.f4 Bf6+=) 14...a6 15.a4 (15.Ne5 Be5 16.f4 Bf6=) 15...ab5 (15...Nf3 16.Bf3 ab5 17.ab5=+) 16.ab5 (16.Ne5 Qe5 17.ab5 Qc7=) 16...b6 (16...Nf3 17.Bf3 c4 18.Rd2=) 17.Ne5 Be5 18.f4 Bf6 19.Bd3 h6 20.Bh7 (20.c4 Bb2 21.Qb2 Bb7=) 20...Kh8 21.Be4 Bb7 22.Rf3 (22.Bb7 Qb7 23.Rd6 Rfd8=) 22...Ra2 23.Bb7 Qb7 24.Qb3 (better 24.Rd6!?=+) 24...Rfa8–/+ 25.Rff1 (25.Qc2!?–/+) 25...Qe4–+ 26.Rfe1?? (26.Rf2–+) 26...c4 27.Qb4 R8a4 (better 27...Be7! 28.Rd4 Qd4 29.ed4 Bb4 30.cb4 Rb2–+) 28.Qf8 Kh7 29.Bc1?? (better 29.Re2–+) 29…Qg2 0–1. GuestWNLT – GuestLLNG, freechess.org, 2019.

8.Bc4 b6

9.0–0 a6 10.Nc3=.

9.0–0 Bb7

10.a4 a6 11.Nc3=.

10.Nc3 Nbd7 11.d4 cd4 12.Nd4 Nc5 13.Qe2 Qc7 14.Rac1 Rac8 (14...Rfd8 15.Nb3=) 15.h3 (15.Rfd1 Rfd8=) 15...Rfd8 16.Rfd1 h6 (16...Bd6 17.Ba3=) 17.Nb3 Nfe4? (better is 17...Bd6=) 18.Ne4+/– Ne4? (better is 18...Be4!? 19.Nc5 Bc5+–) 19.Be6!+– Qb8 20.Bc8 Rc8 21.Rc8 Qc8 22.Qd3 Qe6 23.Qd7 Bc8 24.Qe6 Be6 25.Nd4 Ba2 26.Ra1 Bd5 27.Ra7 Bc5 28.Nf5 Bf8 29.Bg7! Bg7 30.Ne7 Kh7 31.Nd5 Nd6 32.Nb6 Nb5 33.Rf7 Kg6 34.Rd7 (34...Nc3 35.f4+–) 1–0. Nokarookoff – dannyboy238, ChessWorld.net, 2006.

10.d4 a6 11.dc5 ab5 12.Bb5 bc5 13.Qe2=.

10.d4 Nbd7 11.a4 Qc7 12.Nbd2 Rac8 13.Rc1 Ne4 (13...Rfd8 14.Qe2=) 14.Ne4+= Be4 15.Nd2 (15.d5 ed5 16.Bd5 Bd5 17.Qd5 Bf6 18.Bf6 Nf6=) 15...Bb7 (15...Bg6 16.Qf3=) 16.dc5+= Nc5 (16...bc5 17.Bd3+=) 17.Qg4 f6?? (better 17...e5+=) 18.Be6+– (18.Be6 Kh8 19.Bc8 Rc8 20.Rfd1+–) 1–0. guestrvjc – guesthhoi, internet free game, 2018.

10.d4 Nbd7 11.a4 Qc7 12.Nbd2 Rfc8=.

10.d4 Nbd7 11.a4 Qc7 12.Qe2 Rac8 (better is 12...Bf3 13.gf3 cd4 14.Bd4 Rfd8+=) 13.Qd2? (13.Rc1!?=) 13...Rfd8 (better is 13...Bf3 14.gf3 cd4–/+) 14.Nc3?? (better is 14.Be2–/+) 14...cd4 (better is 14...Bf3 15.Be6 fe6 16.gf3 cd4 17.ed4 Bd6–+) 15.Bd3 (15.Qd4 Qc4 16.Qc4 Rc4–+) 15...de3 (better is 15...dc3 16.Bc3 Qc3 17.Qc3 Rc3 18.Be2–+) 16.Qe3 (16.Qe2 Bf3 17.gf3–+) 16...Ng4 17.Qd2 (17.Qe1 Bf3 18.g3–+) 17…Bf3 (17...Bf3 18.Bh7 Kh7–+) 0–1. Wartig,Wolfgang – Marhold,x, corr PCC–cp, 1994.

10.d4 Nbd7 11.Qe2 Rc8=.

10.Ne5 a6 11.Nc3=.

10.Ne5 Qc7 11.f4 Nbd7 12.Qc2 Bd6 (12...Rfd8 13.Na3=) 13.Nf3 (13.Nd7 Nd7 14.Nc3 Nf6=) 13...Rfe8 14.Nc3 h6 (14...Rad8 15.Ng5=) 15.Ne2 (15.d3 e5=) 15...Nd5 16.Qb3 (16.Qd3 Nb4 17.Qb3 a6=) 16...a5 (16...a6 17.Nc3=) 17.Nc3 N5f6 (17...N7f6 18.f5=) 18.a4 Re7 19.h3 Nh5 20.Nd1 (20.Qc2 Rd8=) 20...Ng3 21.Re1 (21.Rf2 Ne4 22.Rf1 Rd8=) 21...e5 (21...Rd8 22.Rc1+=) 22.fe5 Ne5 23.Ne5 Be5 24.Nc3 (24.Rc1 Nf5 25.Be5 Qe5+=) 24...Rd8 25.Rad1 (25.Qc2 Nh5 26.Ne2 Bb2 27.Qb2 Qd6–/+) 25...Kf8 (25...Nf5 26.Kh1 Bc3 27.Qc3 Bg2 28.Kg2 Qg3 29.Kh1 Qh3 30.Kg1 Re4 31.Bf7 Kf7 32.Qb3 Ke7 33.Qb4 ab4 34.Rc1 Rg4 35.Kf2 Qg2) 26.Ne2 Ne4 Attacking the backward pawn on d2 (26...Bb2 27.Qb2 Kg8 28.Nf4+=) 27.Be5= Qe5 28.d3?? (28.Nf4 Ke8 (worse is 28...Rd2 29.Bf7 Rg2 30.Ng2 Rf7 31.Rd8 Ke7 32.Rd7 Kd7 33.Qf7 Qe7 34.Rd1 Nd6 35.Qg6+=) 29.d3 Nf6=) 28...Nd6 (better is 28...Nd2! 29.Rd2 Qe3 30.Kh2 Qd2–+) 29.Nf4+= g5 (29...Qg5 30.Bd5+=) 30.Nh5 (30.Nd5 Bd5 31.Bd5 Qg3+=) 30...Nf5+= e3 draws heavy fire 31.e4 Qd4 32.Kh1 (32.Kh2 Qd6 33.Kg1 Nd4+=) 32...Ne3 33.Rc1 (33.Re3 Qe3 34.Rf1 Rdd7=) 33...f5 (better is 33...Nc4 34.dc4 Be4–/+ (34...Re4? 35.Red1+–)) 34.Qc3? (better is 34.Ng3+=) 34...Qc3–+ (34...fe4? 35.Re3 Qc3 36.Rc3 ed3 37.Red3+–; 34...Nc4?! 35.Qd4 Rd4 36.dc4 Ree4 37.Re4 Be4 38.Nf6–+) 35.Rc3 Nc4 36.Rc4 (36.dc4 Be4 (worse is 36...fe4 37.Ng3–+) 37.Kg1 f4–+) 36...Rd3 37.Ng3 (37.Kh2–+) 37...Rg3 (37...Rg3 38.Kh2 Rd3–+) 0–1. Workowski – Mueller,Jean, Wermelskirchen, 1988.

10.a4 Nbd7

11.Na3 Qc7 12.d3=.

11.Na3 Nd5 12.Nc2 Rc8 13.Rb1 (13.d3 Bf6 14.Bf6 Qf6=) 13...Bf6 14.e4 (14.Qe2 Bb2 15.Rb2 Qf6=) 14...Bb2=+ 15.Rb2 N5f6 (15...Qf6 16.Qa1 Nf4 17.d3=+) 16.d3= Ng4 (16...e5 17.Qd2=) 17.Qe2 Nge5 18.Ne5 Ne5 19.Ne3 (19.f4 Nc4 20.dc4 Qf6=) 19...Qd4=+ 20.Rc1 Rcd8 The pressure on the backward pawn d3 grows 21.Rd2? (better 21.Rb3!?=) 21...Be4!–/+ 22.Nc2 (22.de4 Exploits the pin 22...Qd2) 22...Qb2–+ 23.Rcd1? (better 23.Qd1–+) 23...Nc4 24.dc4 Rd2 25.Rd2 (25.Qd2 Qc2 (25...Bc2?! 26.Rc1–/+) 26.f3 Bg6 27.Qc2 Bc2–+) 25...Bc2 26.h3 (26.Qf1 e5–+) 26...Qb1 (26...Qc1 27.Kh2 Ba4 28.Rd7–+) 27.Kh2 Ba4 28.Rb2 (28.Qd3 Qb4 29.Re2 Bb3–+) 28...Qd1 (28...Qc1 29.Ra2 Bb3 30.Ra7 Qf4 31.g3–+) 29.Qe4 (29.Qd1 Bd1 30.f3 Rd8–+) 29...Qd4 30.Re2 (30.Qd4 cd4 31.Ra2 Bb3–+) 30...Qe4 (30...Bb3 31.Qb1 Bc4 32.Rb2–+) 31.Re4 Rd8 (31...Bb3 32.Kg3–+) 32.Re3 Rd4 33.Rc3 Bd1 34.Ra3 Rd7 (34...Kf8 35.Ra7 Bb3 36.Rc7–+) 35.Rc3 (35.Kg3 Be2 36.Ra4 h5–+) 35...Kf8 36.f3 (36.Ra3 Be2 37.Ra4 Rd4–+) 36...Rd4 37.Ra3 Rc4 38.Ra7 Rb4 39.Ra8 (39.Kg3 Rb5 40.Kf4 Rb2–+) 39...Ke7 40.Ra7 (40.Rg8 c4 41.Rc8 Bb3–+) 40...Kf6 41.Rd7 (41.Kg3 Rb5 42.Rd7 Bb3–+) 41...Bc2 (41...Be2 42.Kg3–+) 42.Rd2 (42.Kg3 Rb5 43.Rc7 Bd3–+) 42...Ba4 (42...Bb3 43.Rd6 Rb5 44.Rc6–+) 43.Kg3 Bb5 44.Kf2 (44.h4 Bc4–+) 44...c4 45.Rc2 Rb3 (45...Ba4 46.Rc1–+) 46.Ke2 (46.h4 e5–+) 46...c3 47.Ke3 Ke5 48.h4 (48.f4 Kd5–+) 48...Bc4 49.f4 Kd5 50.g4 (50.Rc1 c2 51.Kd2 Rg3 52.Kc2 Rg2 53.Kc3 Rg4 54.Rd1 Kc5–+) 50...b5 51.h5 (51.Rc1 e5–+) 51...b4 52.g5 (52.Rc1 Rb2 53.Rd1 Kc5–+) 52...Rb2 53.Rc1 Re2 54.Kf3 c2 (54...c2 55.g6 fg6 56.hg6 h6–+) 0–1. Krjukova,Elena – Mokhova,Kristina (2160), RUS–ch U16 Girls, 2001.

11.d3 Bd6=.

11.d4 Qc7 12.dc5 Bc5 13.Nbd2 Bf3 14.Nf3 Be3 15.Be6 Bf2 16.Rf2 fe6=+.

11.d4 Qc7 12.Nbd2 Rfd8 13.Rc1 Rac8 14.Qe2 Qb8 15.Nb3 Ng4 (15...Bd6 16.dc5 Bf3 17.gf3 bc5 18.f4=) 16.e4 cd4 17.Bd4 Qf4 18.Nbd2 (18.Bd3 Rc1 19.Rc1 Nc5=+) 18...Bb4 (18...Nc5 19.g3 Qh6 20.Bc5 Bc5 21.Nb3=+) 19.g3 (19.h3 Nge5=+) 19...Qh6 20.h4 (20.Nb3 Ndf6 21.Bf6 Nf6=+) 20...Ndf6 (20...Nc5 21.Bc5 Bc5 22.Nb3–/+) 21.Bc3 Bc3 22.Rc3 Ne5 23.Rd1 (23.Re3 Ne4 24.Re4 Rd2 25.Nd2 Be4 26.Qe4 Qd2 27.Qe5+–) 23...Nf3 24.Rf3 Ne4 25.Ne4 Rd1 26.Qd1 Be4 27.Qd7?? (27.Rf4 Bg6 28.Rd4+–) 27...Qc1–+ 28.Kh2 Do you see the mate threat? 28...Rf8 29.Be2 Bf3 (29...Bd5!? 30.Kg2–+) 30.Bf3 Qf1 31.Qd2 (31.Qd4 e5 32.Qe3 Rd8–+) 31...Qc4 32.Bd1 (32.Qd1 Qa2–+) 32...Rc8 (32...Qd5 33.Qd5 ed5 34.Kg2–+) 33.Qd7 Qc7 34.Qd3 Rd8 35.Qf3 h6 (35...Qd6 36.Bc2–+) 36.Be2 (36.Bb3 Qc1–+) 36...Qc2 37.Kg2 Qa4 38.Qc6 Qd4 (38...Qb4 39.Bf3–+) 39.Qc7 Qd7 40.Qc3 (40.Qd7 Rd7 41.f4 Kf8–+) 40...Rc8 41.Qe5 Qd5 (41...Qd5 42.Qd5 ed5–+) 0–1. Krjukova,Elena – Titova,Anastasia, RUS–ch U16 Girls, 2001.

11.d4 Rc8 12.Nbd2=.

8.Bc4 Nbd7

9.0–0 b6 10.d4 Bb7 11.Nbd2 Rc8 (11...a6 12.a4=) 12.Qa4 (12.Qe2 cd4 13.Bd4 Bd6=) 12...Ra8 (12...cd4 13.Nd4 Nc5 14.Qc2= (14.Qa7?? Ra8 15.Qa8 Qa8–+)) 13.Rac1 Ne4 14.Qc2 (14.Rfd1 Nd2 15.Nd2 Bd6+=) 14...Nd2= 15.Nd2 cd4 16.ed4 (16.Bd4!? Rc8 17.Qd3=) 16...Nf6 17.f3 (17.Qd3 Bd5=+) 17...Nd5 18.Qd3 Nf4 19.Qc2 Kh8 (19...a6 20.a4=+) 20.Ne4 Bd5 21.Rfd1 (21.Bd5 Nd5 22.Qe2 Qd7=+) 21...Bc4 22.Qc4 Nd5 (22...a6 23.ba6 b5 24.Qf1 (worse 24.Qb5 Rb8 25.Qe5 Ne2 26.Kf1 Rb2–+) 24...Ra6 25.Rc2=+) 23.Qb3 (23.Re1 Kg8=) 23...Qd7 24.Rc6 Rfc8 (24...a6 25.Rdc1=+) 25.Rdc1 Rc6 26.bc6 Qc7 27.g3 Rc8 28.Nc3 Qd6 (28...Nc3!? 29.Qc3 Rd8=+) 29.Nb5= Qb8 30.Qa4 a5 31.c7 Qb7 (31...Qa8 32.Qc2=) 32.Qc4 (32.Ba3 Nb4 33.Bb4 A) 33...ab4?? 34.Na7 Qf3 35.Qc6 (35.Nc8?! Qe3 36.Kg2 Qe2 37.Kh3 Qh5 38.Kg2 Qe2 39.Kh1 Qf3 40.Kg1 Qe3 41.Kg2 Qe2=) 35...Qe3 36.Kh1+–; B) 33...Bb4+=) 32...h6 33.a4 Kg8 34.Qc2 g6 35.Qc6 Qc6 36.Rc6 Kf8 37.Bc1 h5?? (better 37...g5=+) 38.Bf4+– Nf4 39.gf4 Ke8 40.Na7 (40.Na7 Kd7 41.Nc8 Kc6 42.Ne7 Kc7 43.f5 gf5 44.Kf2+–) 1–0. GuestRXMP – olma, freechess.org, 2018.

9.0–0 Nb6 10.Be2 Nfd5 11.Ne5 (11.d4 Bd7=) 11...Bf6 12.a4 (12.d4 Qc7=) 12...Nb4 (12...Nd7 13.d4=) 13.d4 cd4 14.Bd4 Qc7 15.a5 N6d5 16.Nf3 (16.f4 Rd8 17.Qd2 Be5 18.Be5 Qc2+=) 16...e5=+ 17.Bb2 Bf5 18.Na3 Rfd8 19.Qa4 Be6 (better 19...Bd3!? 20.Rfc1 Qe7=+) 20.Rfc1+= Qe7 21.Bf1 (21.Nc2 e4 22.Bf6 Qf6 23.Nb4 Nc3+–) 21...Bf5 22.Be2 Rac8 (22...Bd3 23.Bd1=+) 23.Rc4 Rc4 24.Bc4 Nd3 25.Bd3 Bd3 26.Rc1 Bf5 (26...Be2 27.Nc4=+) 27.Nc4 e5 draws heavy fire 27...e4 28.Ba3? (better 28.Nd4 Bd4 29.Bd4= (worse 29.ed4 Qg5–/+)) 28...Qe6–+ 29.Nd4 Bd4 30.ed4 Nf4 31.Qd1? (better 31.Kh1 Nd3 32.Ne3 Nc1 33.Bc1–+) 31...Bg4 32.f3 (32.Qc2 Ne2 33.Kh1 Nc1 34.Qc1 Rc8–+ (34...Rd4?! 35.Ne3–+)) 32...ef3 (32...Bf3 33.Qc2 (33.gf3?? Qg6 34.Kf2 Qg2 35.Ke1 Rd4 36.Ne3 Rd1 37.Rd1 Qe2) 33...Ne2 34.Kh1 Nc1 35.Qc1 Rd4 36.Ne3–+) 33.gf3 Bf3! 34.Qf3 Ne2 35.Kg2 Nc1 36.Ne5 (36.Nd6 Ne2 (36...Rd6?! 37.Bd6 Qd6 38.Qb7 Qg6 39.Kh1–+) 37.d5 Qg6 38.Kf1 Nd4–+ (38...Rd6 39.Bd6 Nc1 40.Qh3 Qf6 41.Ke1 Qd6 42.Qc8 Qf8 43.Qc1=+)) 36...Rd4 37.Qb7 (37.Bc1 Qe5 38.b6–+) 37...Qd5 (better 37...Qa2 38.Kg3 Qa3 39.Nf3 Qd6 40.Kf2 Nd3 41.Kf1 Qf6–+) 38.Qd5 Rd5 39.b6? (better 39.Nc6 Rd2 40.Kf1–+) 39...ab6 (39...Re5?! 40.b7 Rg5 41.Kf1 Rf5 42.Kg2–+) 40.ab6 Re5 41.Bc1 Re6–+. Fernandez,Man – Arana,A, EQ GC, 1988.

9.0–0 Nb6 10.Be2 Bd7=.

9.a3 Nb6 10.Qc2 Nc4 11.Qc4 b6 12.d3 Bb7 13.Nbd2 (13.e4 a6 14.Nc3 ab5 15.Nb5 Ba6=+) 13...Qd7 (13...a6!?–/+) 14.Ne5=+ Qd5 (14...Qe8 15.0–0=+) 15.e4 Qc4 16.Ndc4 Rfd8 17.0–0 (17.a4 Rab8=) 17...Nd7 (17...Nh5 18.Nc6 Bc6 19.bc6–/+) 18.Nc6+= Re8 19.Ne7 Re7 20.Nd6 Nf8 21.Rad1 Rd8 22.Nc4 Ng6 23.f4 (better is 23.Rfe1!?=) 23...Red7–/+ 24.f5 ef5 25.ef5 Nh4 26.Rf4 Ng2 27.Rg4 g6 28.fg6 hg6 29.Rg2 Bg2 30.Kg2 Rd3 31.Rd3 Rd3 32.Be5 Kf8 33.a4 (33.Bd6 Ke8 34.Be5 Ke7=+) 33...Ke7–/+ 34.a5 ba5 35.Na5 Ke6 36.Bb8 Rd2 37.Kf3 Ra2 (37...Rb2 38.Nc4 Rb4 39.Nd6–+) 38.Nc6 a5 39.Nd8 Kf6 40.b6 Ke7 41.Bc7 Ra3 42.Kf4 Ra4 43.Kg5 f6 44.Kg6 Rg4 45.Kh7 (better is 45.Kf5!? Rg5 46.Ke4+/–) 45...Rh4= 46.Kg6 Rg4 47.Kf5 Rg5 48.Kf4 Kd7 49.h4 Rd5 50.Ne6?? (50.Ke3 c4 51.Ke4 Rh5+=) 50...c4?? (50...Ke6 51.b7 Rd4 52.Ke3 Rb4+=) 51.b7+= Rb5 52.b8Q Rb8 53.Bb8 Ke6 54.h5 a4 55.Ba7 c3 (55...a3 56.Bd4 Kf7 57.Kf5+–) 56.Bd4 c2 57.Bb2 Kf7 58.Kf5 Kg7 59.Bf6?? (better is 59.Bc1+=) 59...Kh6–+ 60.Bb2 Kh5 ½–½. Gross,Wilhelm – Tain,Julio, corr SOK–87–03, 1988.

9.a3 Nb6 10.Be2 Bd6 11.Nc3 Bd7 12.0–0 Qe7 13.Qc2 Rac8 14.Ng5 h6 15.Nge4 Bb8 (15...Ne4 16.Ne4 Rfd8 17.f4=) 16.Nf6+= Qf6 17.a4 Qh4 18.g3 Qh3 19.Qe4 f5 (19...Rc7!?+–) 20.Qb7+– Be8? (better 20...Rf7 21.Qg2 Qg2 22.Kg2 Nd5+–) 21.a5 Bg6 (21...Rf7 22.Qa6 f4+–) 22.ab6 ab6 (22...Be5 23.ba7 Ra8 24.f4+–) 23.Nd5! Bf7 (23...ed5 24.Qg7) 24.Ne7 Kh8 25.Nc8 e5 26.Qb8 f4 27.Qe5 Rg8 28.Ne7 f3 29.Qg7! Rg7 (29...Rg7 30.Ra8) 30.Ra8 Kh7 (30...Qc8 31.Rc8 Kh7 32.Bd3 Bg6 33.Bg6 Rg6 34.Rh8) 31.Bd3 Bg6 (31...Qf5 32.Bf5 Bg6 33.Bg6 Rg6 34.Rh8) 32.Bg6 Rg6 33.Rh8 1–0. usingprogram (1990) – armel (1730), kurnik, 2013.

9.a4 a6 10.ba6 ba6 11.Qc2=.

9.a4 Nb6 10.Be2=+.

9.Qc2 b6 10.0–0 (10.d3 a6=) 10...Bb7 11.Be2 Nd5 (11...Bd6 12.Nc3=) 12.a3 (12.Nc3 Nb4 13.Qb3 Bd6=) 12...N7f6 (12...a6 13.d4=) 13.Bd3 (13.d4 a6=) 13...h6 (13...a6 14.ba6 Ba6 15.Ba6 Ra6 16.d4=+) 14.h3 (14.Rd1 Bd6=) 14...Rb8 (14...a6 15.ba6 Ba6 16.Ba6 Ra6 17.Rc1=+) 15.Be2 ½–½. Tanacs,Istvan (1660) – Kecskemeti,K (1665), Lakitelek HUN, Open (4), 2011.

9.a4 b6

10.0–0 Bd6 11.d3=.

10.0–0 Bb7

11.d3 a6=.

11.d4 Rc8 12.Nbd2 cd4 13.Nd4 Bb4 14.Rc1=.

11.d4 Rc8 12.Nbd2 cd4 13.Nd4 Qc7 14.Rc1=.

11.d4 Rc8 12.Nbd2 Nd5 13.a5 (13.Rc1 cd4 14.Nd4 Nc5=) 13...ba5 14.Bd5 (14.Qe2 N7b6=) 14...Bd5=+ 15.Qa4 (15.e4 Bb7=+) 15...c4= 16.Bc3 (16.e4!? Ba8 17.Qa5 Qa5 18.Ra5+=) 16...Bb4=+ 17.Bb4 (17.Qc2 Bf3 18.Nf3 Qb6=+) 17...ab4–/+ 18.Qb4 (18.e4 Ba8 19.Qb4 c3 20.Ra7 cd2 21.Nd2 Nb6–/+) 18...c3 19.e4 Ba8 (< 19...cd2 20.ed5 ed5 21.Ra7+/–) 20.Nc4 (20.Nb1 Be4 21.Nc3 Bf3 22.gf3 Qg5 23.Kh1–/+) 20...Nf6 (20...Be4 21.Nd6 Qe7 22.Ne5–/+) 21.Ra7 (21.Qc3!? Be4 22.Nfe5= (< 22.Ra7 Bf3 23.gf3 Qd5–/+)) 21...Be4 22.Nfe5 (better is 22.Qc3!? Bf3 23.gf3–/+) 22...Qd4–+ 23.Rf7 Rf7 24.Nf7 Qc4 (better is 24...Rc4 25.Qe7 c2 26.Ng5–+) 25.Qe7 (25.Qc4 Rc4 26.Nd6 Rb4–+) 25...Qc7 (25...c2 26.Rc1 Qd5 27.h3 Qd1 28.Rd1 cd1Q 29.Kh2–+) 26.Qe6 (26.Nh6 gh6 27.Qf6–+) 26...Re8 (26...Qf7?! 27.Qc8 Qe8 28.Qc3 Qb5 29.Qc8 Kf7 30.Re1=+) 27.Nh6 Kf8 28.Qh3 gh6 29.Qh6 Qg7 (30.Qh3 Nd5–+) 0–1. Piron,Jean Marie (1890) – Borovikov,Vladislav (2595), It (open) (active), 2005.

11.d4 Rc8 12.Nbd2 Ne4 13.Ne4 Be4 14.Nd2 (14.d5 ed5 15.Bd5 Bd5 16.Qd5 Bf6 17.Bf6 Nf6 18.Qd8 Rfd8=) 14...cd4 15.Bd4 Bf6 (15...Bg6!?=) 16.Ne4+= Rc4 17.Bf6 (17.Nf6 Nf6 18.Qe2 Qc7+=) 17...Nf6 18.Qd8 Rd8 19.Nf6 gf6 20.Rfc1 Rc1 (20...Rdc8 21.Rc4 Rc4 22.Kf1+=) 21.Rc1 Rd7 (21...a6 22.ba6 Ra8 23.g4+=) 22.g3 (22.Kf1 f5+=) 22...Kg7 (22...f5 23.Kf1+=) 23.h4 (23.Kf1 e5+=) 23…Kg6 ½–½. Vahvaselka,J – Hasler,Ulrich, corr ICCF, 1991.

7.Be2 Bd7

8.0–0 Qb6 9.a4 a6 10.Nc3 dc4 11.Bc4 ab5 12.ab5 Ra1 13.Ba1 Rd8 14.Qc2 Be8 15.Bb2 Nbd7 16.Ra1 Nf8 (16...Ng4 17.Ne4+–) 17.Na4+– Qd6?? (better 17...Qc7+–) 18.Be5+– Qd7 19.Nb6 1–0. DEFFM – GuestKZHS, freechess.org, 2018.

8.Ne5 dc4 9.Bc4 Bb5?? (better 9...a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Ne8=) 10.Bb5+– Qb6 (10...a6 11.Be2+–) 11.Qb3 a5 (11...Rd8 12.d3+–) 12.0–0 Nd5 13.Nc3 Nb4 (13...Bf6 14.Nc4 Qc7 15.Rfc1+–) 14.f4 Bf6 15.a3 Be5 16.fe5 Nd3 (16...Nd5+–) 17.Na4 c4 18.Qc4 (better 18.Nb6 cb3 19.Bd3 Ra7+–) 18...Nb2 19.Nb6 Nc4 20.Nc4 Rc8 (20...Na6 21.Nd6+– (21.Na5?! Nc7 22.Nb7 Nb5+–)) 21.Nb6 (21.Nb6 Nc6 22.Bc6 bc6 23.Rab1+–) 1–0. onur604 (2285) – braunegefahr (2045), lichess.org, 2020.

7.Be2 Nbd7

8.0–0 a5 9.a4 Re8 10.d3 Bd6 11.Nbd2 Nb6 12.h3 Qc7 (12...e5 13.cd5 Nbd5 14.Nc4=) 13.Bf6+= gf6 14.cd5 ed5 15.Nh4 Qe7 (15...f5 16.Nhf3=) 16.Bg4+= Be6 17.Bf5 Kh8 (17...Qf8!?+=) 18.Qh5+/– Bf5 19.Nf5 Qf8 20.Nd6 Qd6 21.Qf7 Re7 22.Qh5 Rg8 23.Kh1 Rg5 24.Qf3 Reg7 25.Rg1 Nd7 26.Qe2 Qe6 27.g4 (27.Nf3 R5g6+/–) 27...f5+= 28.f3 f4 29.e4 Ne5 30.ed5 Qd5 31.Ra3 Ng6 32.Nc4 (32.Qe8 Rg8 33.Qe4 Rg7+=) 32...Re7 33.Qd1 Nh4 34.Rf1 Rg6 (34...h5 35.Qc1 (35.Na5 hg4 36.Nb7 g3 37.Qa1 Kh7–+) 35...hg4 36.Qf4+= (36.hg4 Rg4 37.Qb2 Kg8–+)) 35.Nd2 (better is 35.Qd2!? Kg7 36.Qf4+/–) 35...Re3= Now all is on f3 36.Ne4 (36.Qb3 Qb3 37.Rb3 b6=) 36...Rg7 37.Kg1? (better is 37.Rc3 b6 38.Nd2+=) 37...Qd4–+ 38.Kh1 (38.Rf2 Nf3 39.Kf1 Re1 40.Qe1 Ne1 41.Ke1–+) 38...Rd7 (better is 38...Qb2 39.Nd2 Qa3–+) 39.Qc1+= b6 (better is 39...c4 40.Rc3 cd3 41.Rc8 Kg7=) 40.Qd2?? (better is 40.Nd2=) 40...Nf3–+ 41.Qc1? (41.Qf2 Re7 42.Raa1 Qd3–+) 41...Qe5 (41...Nh4 42.Ra2–+) 42.Qd1? (42.Nf2–+) 42...Nh4 (better is 42...Qe4 43.de4 Rd1 44.Rd1 Ra3 45.Rd8 Kg7 46.Rd7 Kf8–+) 43.Rf2?? (43.Qa1 Qa1 44.Raa1 Rh3 45.Kg1–+) 43...Rh3 44.Kg1 Qe4!! 45.Qa1 (45.de4 Rg3 Double attack (45...Rd1 Pinning; 45...Rd1 Deflection; 45...Rd4 Decoy)) 45...Qd4 46.Qe1 (46.Qd4 Rd4 47.Kf1–+) Nf3 (46...Nf3 47.Kg2 Ne1 48.Kh3 Qe3 49.Kh4 Rg7 50.d4 Qf2 51.Rg3 Qg3 52.Kh5 Qh2#) 0–1. Mauron,Regis – Couronne,Patrice (1720), 3rd Montigny le Bretonneux Noel op, 2010.

8.0–0 a5 9.Qc2 dc4 10.Na3 b6 11.Nc4 Bb7 12.Rad1 Nd5 13.d4 Rc8 14.dc5 White terminates the opponent with strong threats 14...Bc5 (14...Nc5? 15.e4+–) 15.e4 Nb4 (15...Nf4!? 16.Be5 Ng6+=) 16.Qc3+– The mate threat is Qxg7 16...f6 17.a3 Be4 18.ab4 ab4 (18...Bb4 19.Qd4 Bd5 20.Ne3 Bf3 21.Bf3+–) 19.Qb3 (19.Qd2 Rf7+–) 19...Qe7 20.Ne3 Rfe8 21.Nd4 Bd4 (21...Ne5 22.f4+–) 22.Rd4 (22.Rd4 Nc5 23.Qb4+–) 1–0. Pcmvr (2370) – Wwgia (1990), internet, 2008.

8.0–0 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 b6 12.Nc3 Bb7 13.d4 Qc7 14.Qb3 Ra8 (14...cd4 15.Nd4 Nc5 16.Qc2=+) 15.Bb2 (15.cd5 cd4 16.Nd4 Nc5=+) 15...dc4 (15...Bd6=+) 16.Bc4? (better 16.Qc4 Qb8 17.Rd1=) 16...Nd5?? (better 16...Bf3 17.gf3 cd4–/+) 17.Bd5 (17.Nd5!? Bd5 18.Bd5 ed5 19.Qd5+–) 17...ed5+– 18.dc5 (18.Nd5!? Qd6 19.e4+–) 18...Nc5 19.Qd1 Bf6 (19...Qd7 20.Qc2=) 20.Nd4 (20.Nd5 Bd5 21.Qd5 Rd8+–) 20...Bd4 (20...Ne4 21.Qd3=+) 21.ed4 (21.Qd4!? Ne6 A) worse 22.Nd5 Qd8 23.Nf6 Qf6 (23...gf6?! 24.Qg4 Kf8 25.Rd1–/+) 24.Qb6 Qb2 25.Qb7 Ra5–+; B) 22.Qg4+=) 21...Ne6 22.Ne2 (22.Qd3 Qc4 23.Qc4 dc4=+) 22...Bc8 (22...Qc4!?–/+) 23.Qb3 Qd6 24.h3 Bb7 25.Ra1 Ra1 26.Ba1 h6 27.Bb2 Qb8 28.Ba3 Qa7 29.Bd6 (29.Qb4!?=) 29...Qa1 30.Kh2 Nd4 31.Nd4 Qd4 32.Qg3 Qf6 (32...f6 33.Qa3 Kh7 34.Qa7=+) 33.Be5 Qg6 (better 33...Qg5=+) 34.Qc3 (34.Qg6 fg6 35.Bd4 Bc8=) 34...f6 (34...d4!? 35.Qg3 d3 36.Qg6 fg6–/+) 35.Bc7 (35.Bd4 Qe4=) 35...f5 (35...Qb1!?=+) 36.Be5 (better 36.Qd4+=) 36...Kh7?? (better 36...d4 37.Qc4 Kh7=) 37.Qc7+– Qe6 (37...Ba8 38.Qa7 d4 39.Qa8 d3+–) 38.Qg7 1–0. Scirocco – fastEddie, Live Game Caissa's Web, 2004.

8.0–0 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 dc4 12.Bc4 b6 13.d4 Bb7 14.Nbd2 Ne4 (14...Qc7 15.Qc2=) 15.Ne4= Be4 16.d5 ed5 17.Bd5 Bd5 18.Qd5 Bf6 19.Qb7 Qa8 20.Qd7 Ba1 21.Rd1 (21.Qc6 Rb8=) 21...Bf6= 22.Qc7 Rd8 (22...Qa4 23.Rb1 Qa2 24.Rf1=) 23.Rf1 Qa5 (23...Qb8 24.Qb8 Rb8 25.Nd2=) 24.Qc6 (24.Ne5 Qb5 25.Qf7 Kh8+=) 24...h6 (24...Qa7=) 25.g3 (25.e4!?=) 25...Qa8=+ 26.Qa8 Ra8 27.Nd2 Ra4 28.Rc1 Rb4 (28...Be5 29.f4 Bc7 30.Nb1=+) 29.Rb1 Ra4 30.Rc1 Rb4 ½–½. Buczinski,Henryk (2200) – Janik,R (2000), DMSl.–Klasa A Poland, 1993.

8.0–0 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 dc4 12.Bc4 Nb6 13.Be2 Nbd5 14.Qb3 b6 15.Ne5 Bd6 16.f4 Qc7 17.Na3 Nd7 18.Nf3 (18.Nac4 f6 19.Nd6 Qd6+=) 18...Be7 19.Bc4 Rd8 20.Bd5 ed5 21.Qd5 Bb7 22.Qf5 c4 23.Ng5 Nf6? (better is 23...Bg5 24.Qg5 f6+=) 24.Bf6+– Bf6 25.Qh7 Kf8 26.Qc2 c3 27.Nh7 Ke7 28.Nf6?? (better is 28.d4+–) 28...Rd2–+ 29.Ng8 Kf8 30.Qh7 (30.Qa4 Rg2 31.Kh1 Kg8 32.e4–+) 30...Rg2 31.Kh1 Rg6 (31...Rg6 32.e4 Be4 33.Rf3 Bf3#) 0–1. Thesing,Michael (1975) – Lodde,Martin (1935), Verbandsliga Muensterland, 2005.

8.0–0 a6 9.a4 ab5 10.cb5 b6 11.Nc3 Bb7 12.d4 Qc7 13.Qc2 (13.Rc1 Bd6=) 13...Rfc8 14.Rfc1 cd4 15.Nd4 (15.ed4 Qf4+=) 15...Ne5 16.Nb1 (16.h3 Nc4+=) 16...Qc2 17.Rc2 Rc2 18.Nc2 Nc4 19.Bd4 e5 20.Bc4 ed4 21.Bd3 de3 22.Ne3 Ne4 (better is 22...Nd7!?–/+) 23.Be4= de4 24.Nd2 Rd8 (24...Bf6 25.Ra2=) 25.Ndc4+= White intends a5 25...Bc5 26.a5 ba5 27.Na5 Ra8 28.Nec4 Bd5 29.Rb1 (29.Rd1 Bc4 30.Nc4 Kf8+=) 29...Be6 (29...f5 30.g3=) 30.h3+= Bb6 31.Nb6 Ra5 32.Rb4 Kf8 33.Na4 (worse is 33.Re4 Rb5 34.Nc4 Rb4+=) 33...Bd7 Attacks the isolani on b5 (33...f5 34.b6 Bc8 35.Rc4+=) 34.b6 Bc6 35.Nb2 (35.Kh2 Bb7+/–) 35...Bb7+= 36.Nc4 Ra1 (36...Rd5 37.Ra4 Rd1 38.Kh2+=) 37.Kh2 Ke7 38.Rb5 Rd1 (38...Ra8 39.Rc5 Rd8 40.Kg3+=) 39.Na5+/– Rd7 40.Nb7 (40.Kg3!?+/–) 40...Rb7= 41.Re5 (41.Kg3 Kd6=) 41...Kd6 42.Re4 Rb6 ½–½. Gerold,Guenter – Hund,Gerhard, Bad Neustadt, 2000.

8.0–0 Bd6 9.d3 (9.d4 a6=) 9...e5 (9...Qc7 10.Nbd2=) 10.cd5 Nd5 11.Nbd2 Qe7 12.Qb3 N5f6 13.Nc4 e5 draws heavy fire 13...Bc7 14.e4 (14.a4 Nd5=) 14...Rd8 (14...Nh5 15.Qc3=) 15.a4 (15.Qc3 Nh5=) 15...b6 (15...Nh5!?=) 16.a5+= ba5 (16...Rb8 17.ab6 ab6 18.Qc3+=) 17.Na5+/– Ba5 18.Ra5 a6 19.Qc3 (19.Qa2 Nh5+=) 19...Re8 20.Rfa1 Qd6 21.Nd2 Bb7 22.Nc4 Qe6 23.ba6 Ra6 24.h3 Ra5 25.Qa5 Qc6 26.Qd2 (26.Qa4 Qe6+=) 26...Bc8 (26...Ba6 27.Ne3+=) 27.Qg5 h6 28.Qg3 Qc7 29.Bc1 Kh8 30.f4 Ng8 (30...Qb8 31.fe5 Ne5 32.Ne5 Qe5 33.Qe5 Re5 34.Ra5+–) 31.Bh5 Ndf6+/– 32.Be2 Nd7+– 33.fe5 Ne5 34.Ra8 f6 35.Ne5 fe5+/– 36.Bg4 Bd7 37.Re8+– Be8 38.Bb2 c4 39.Be5 Qb6 40.Qf2 Qf2+/– 41.Kf2 cd3 42.Ke3 Bb5 43.Bc3 Nf6 44.Bf3 Nd7 45.Bd4 Kg8 46.Bd1 Bc4 47.Ba4 Nf6+= 48.Bc6 Kf7 49.Bc3 g5 50.Kd4 Ba6 51.g4 d2 52.Bd2 Bf1 53.e5 Bh3? 54.ef6+– Kf6 55.Bf3 h5 56.gh5 Bf5 57.Be4 g4 58.Bf5 Kf5 59.Kd3 g3 60.Ke2 (60.Ke2 g2 61.Kf2+–) 1–0. Bulcourf,Carlos (2250) – Diaz,Emilio, ARG–ch sf San Martin, 1987.

8.a4 a5 9.0–0 b6 10.Nc3 Bb7 11.d4 (11.cd5 Nd5 12.Rc1 Bf6=) 11...Rc8 (11...dc4 12.Bc4 cd4 13.Nd4=) 12.cd5 Nd5 13.Nd5 (13.Rc1 Nc3 14.Bc3 Bd5=) 13...Bd5 14.Rc1 Qc7 (14...Bf6 15.Bd3=) 15.Bc4 Bc4 (15...Bf6 16.Bd5 ed5 17.Ba3+=) 16.Rc4 Qb7 (16...Bf6 17.Qc2+=) 17.Qe2 cd4 18.Nd4 Rc4 19.Qc4 Ne5 20.Qb3 Bf6 (20...Nd7!?+=) 21.Ne6!+/– Nf3 (21...fe6 22.Be5) 22.gf3+– fe6 23.Qe6 Kh8 24.Bf6 gf6 25.Qh3 Qd5 (25...Rg8 26.Kh1+–) 26.Rc1 (26.Kh1 Rg8+–) 26...Rg8 27.Kh1 Qd2 The mate threat is Qxc1 28.Qf1 (28.Rg1 Qf2 29.Rg8 Kg8 30.Qg2 Qg2 31.Kg2 Kf7+–) 28...Qd5 Do you see the mate threat? 29.Qh3?? (29.e4 Qa2 30.Ra1 Qf7+–) 29...Qg5?? (29...Qd2 30.Rg1 Qf2 31.Rg8 Kg8 32.Qg2 Qg2 33.Kg2 Kf7+–) 30.Qg4+– Qd5 31.Rc8 Rd8 (31...Rc8 32.Qc8 Kg7 33.Qg4 Kf8 34.Kg2+–) 32.Rd8 Qd8 33.Qd4 Qd4 34.ed4 Kg7 35.Kg1 (35.Kg2 Kg6+–) 35...Kg6 (35...Kf7 36.Kf1+–) 36.Kf1 (36.Kg2 Kf5 37.Kg3 Ke6+–) 36...Kf5 (36...f5 37.f4 Kf6 38.Kg2+–) 37.Ke2 Ke6 38.Ke3 Kf5 (38...Kd5 39.h3 h5+–) 39.f4 (better is 39.h4!? Ke6 40.Ke4 h5 41.d5 Kd6+–) 39...Ke6 40.Ke4 f5 41.Ke3 Kd6 42.Kd3 Kd5 43.h3 h6 44.h4 h5 45.f3 (better is 45.Kc3+–) 45...Kd6= 46.Kc4 Ke6 47.d5 Ke7 ½–½. Kreuzer,Uwe – Martin, corr, 1986.

8.a4 a5 9.0–0 b6 10.d3 Bb7 11.Nbd2 Qc7 12.Qc2 Rac8 13.e4 (13.h3 Bd6=) 13...Rfe8 (13...d4 14.Rfe1=+) 14.Rfe1 d4 15.g3 Nf8 16.Bf1 (16.Nh4 g5 17.Nhf3 N6d7=+) 16...Ng6 17.Bg2 e5 (17...h6 18.Rad1=+) 18.Nf1 (18.Bh3 Rcd8=+) 18...Rcd8 19.h4 (19.Bh3 Nf8=+) 19...Bc8 (19...Qd7 20.N1d2=+) 20.N1h2 (20.N1d2 h6=+) 20...h6 21.Qe2 (21.Nf1 Nf8=+) 21...Bd7 (21...Nf8 22.Qd1–/+) 22.Qf1 (22.Nd2 Nf8=+) 22...Qc8 23.Bc1 Bd6 24.Kh1 (24.Nd2 Nf8–/+) 24…Kh7 ½–½. Melich,Jindrich (2140) – Tepper,Frantisek (2235), Tatry op Tatranska Lomnica, 1998.

8.a4 a5 9.0–0 Nb6 10.d3 Qc7 11.Nbd2 e5? (better 11...Bd6!?=) 12.Be5 Qd7 (12...Bd6 13.d4 cd4 14.ed4 dc4 15.Bc4 Nc4 16.Nc4 Qc4 17.Bd6+–) 13.cd5 Nbd5 14.Nc4 b6?? (better 14...Qd8+–) 15.e4 Nf4 (15...Qb7 16.ed5 Nd5+–) 16.Bf4 Bb7 (16...Qb7 17.Nfe5+–) 17.Nb6 Qe6 18.Na8 Ra8 19.Ng5 Rd8 (19...Qb6+–) 20.Ne6 fe6 21.Qb3 Kf7 22.Qc4 (22.Bc7 Rd4+–) 22...Rd4 23.Qb3 h6?? (23...Rd8 24.Bc7 Rc8 25.Ba5 h6+–) 24.Bc7+– Bd8 25.Bd8 Rd8 26.Qc4 Nd7 27.Bh5 g6 28.Bg6! Kg6 29.Qe6 Kh5 30.Qf5 Kh4 31.g3 1–0. GuestHRYV – GuestVRRL, freechess.org, 2019.

8.a4 a6 9.0–0 ab5 10.ab5 Ra1 11.Ba1 b6 12.d3 Bb7 13.Nbd2 Qc7 14.Qc2 Ra8 15.h3 e5 16.cd5 Bd5 (16...Nd5 17.Bb2=+) 17.e4 (17.Nc4 Bd6=) 17...Be6 18.Nc4 e5 becomes the focus of attention 18...h6 (18...Bd6 19.Rc1=) 19.Be5+= Ne5 20.Nfe5 Nd7 21.Nc6 Bf6 22.f4 Bd4 23.Nd4 cd4 24.Bg4 Bc4 25.Bd7 Qd7 26.Qc4 Rc8 27.Qa4 Rc3 28.e5 Rd3?? (better 28...Qd8+=) 29.Qa8+– Kh7 30.Qe4 (30.Qe4 Kg8 31.Qd3+–) 1–0. DEFFM – GuestYFQP, freechess.org, 2018.

8.a4 a6 9.0–0 ab5 10.ab5 Ra1 11.Ba1 b6 12.d3 Qc7 13.Nbd2 (13.cd5 ed5 14.Qc2 Re8=) 13...Bb7 14.Qc2 (14.cd5 Nd5 15.Qb3 Ra8=) 14...Bd6 (14...Ra8 15.cd5 Nd5 16.d4=) 15.h3 (15.cd5 Nd5 16.Nc4 Ra8=) 15...e5 16.e4 de4 (16...d4 17.Nb3=) 17.de4 Ra8 18.Bc3 Nf8 19.Ra1 Ra1 20.Ba1 Ne6 21.Bd1 (21.Bc3 Nd4 22.Qd3 Qc8=+) 21...Nd4 (21...Qb8 22.Qd3=+) 22.Qb1 (22.Qd3 Qd8=+) 22...Qc8 (22...Qb8 23.Bc2=+) 23.Ne1 Qa8 24.f3 Qa3 (24...Nh5 25.Nd3=+) 25.Nf1 (25.Nd3 Nh5=) 25...Nh5 (25...Bc8 26.Qb2 Qa8 27.Nd3=+) 26.Qb2 (26.Nd3 Nf4 27.Nf4 ef4 28.Bd4 cd4=+) 26...Qa5 (26...Qa8 27.Nd3=+) 27.Qc3 (27.Nc2 Nc2 28.Bc2 Nf4=+) 27...Qa2–/+ 28.Bb2 Nf4 29.Kh1 (29.Kh2 Be7=+) 29...Bc8 (29...Be7 30.Ne3–/+) 30.Ne3 Qa7 (30...Be6 31.Kh2–/+) 31.Nd3= Nd3 32.Qd3 Bb7 (32...Be6 33.Nd5=+) 33.Qa3 Qb8 34.Bc3 h6 (34...Be7 35.Nd5 Bd5 36.ed5=) 35.Qa1 (35.Nd5 Bd5 36.ed5 Qd8=) 35...Kh7 (35...Qd8 36.Qa7 Ba8 37.Bc2=) 36.Nd5 Bc8 37.Be1 (37.f4 ef4 38.Bd4 cd4 39.Qd4 Bc5=) 37...f6 (37...Kg8 38.Bc3=) 38.Bh4 (38.Qc3 Be6=) 38...Kg6 (38...Qb7 39.Qc3=) 39.Bg3 Kh7 40.Kh2 (40.Qc3 Be6=) 40...Kh8 (40...f5 41.Qc3=) 41.Qa2 (41.Qc3 Be6=) 41...Qb7 (41...Be6 42.Qf2=) 42.Qa1 (42.Qf2 Be6=) 42...Bb8 (42...Kg8 43.Qa3=) 43.Qa2 Ba7 (43...Kh7 44.Qd2=) 44.Qa1 ½–½. Hess,Helmut (1615) – Nietsch,Horst (1815), 7th Berlin–ch Seniors, 2011.

8.a4 a6 9.0–0 dc4 10.Bc4 ab5 11.Bb5 Nd5 12.Nc3 N7f6 13.d4 Nc7 14.Be2 Nfd5 15.Qb3 cd4 16.Nd4 Bd7 17.Nd5 (17.Qb7? Rb8 18.Qa7 Rb2 19.Nd5 Nd5–+) 17...Nd5 18.Rfc1 (18.Qb7? Rb8 (18...Ra4 19.Ra4 Ba4 20.Ra1+=; 18...Ba4?! 19.Rfb1=) 19.Qa7 Rb2–+) 18...Qb8 19.Bf3 Ra5 20.Nb5 Bc6 21.Nd4 Bd7 22.Nb5 (better is 22.Nf5! ef5 23.Bd5+/–) 22...Bc6= 23.Nd4 ½–½. Jeschke,Holger (1920) – Rudolph,Hans Joachim (1825), Schleswig Holstein–ch, 2001.

8.a4 b6 9.0–0 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.a4 Nbd7).

8.a4 b6 9.0–0 Qc7 10.d3 (10.Qc2 Bd6=) 10...Bb7 (10...dc4 11.dc4 a6 12.Nc3=) 11.Nbd2 (11.cd5 Nd5 12.Nc3 Nc3 13.Bc3 a6=) 11...e5 (11...dc4 12.Nc4 a6 13.Qb3=) 12.cd5 Bd5 (12...Nd5 13.Nc4 Bd6 14.a5=) 13.e4+= Bb7 (13...Be6 14.Ng5+=) 14.Nc4 White plans a5. e5 draws heavy fire 14...Bd6 15.a5 ba5 (15...Rfe8 16.Qb3+=) 16.Ra5+– (16.Na5?! a6=) 16...Rfe8 (16...a6 17.b6 Nb6 18.Nd6 Qd6 19.Be5+–) 17.Qa1 (worse 17.Nd6 Qd6 18.Qb3 a6 19.ba6 Ra6=) 17...a6 (17...Qb8 18.Nd6 Qd6 19.Ra7+–) 18.ba6 Bc6 (18...Bc8 19.a7+–) 19.a7 (19.Nh4 Bf8+–) 19...h6 (19...Nh5 20.Bc1+–) 20.Nd6 Qd6 21.Nd2 c4?? (better 21...Qc7+–) 22.Nc4 Qb4 (22...Qc7 23.Rc1+–) 23.Be5 (23.Qa3 Qb7+–) 23...Ne5 24.Ne5 (24.Re5?! Re5 25.Ne5 Be8+–) 24...Re5 (24...Bd7 25.Nd7 Nd7 26.Bf3+–) 25.Qe5 Nd7 (25...Qb7 26.Rc1 Bd7 27.Qc5+–) 26.Qc7 Qb7 1–0. GuestVMZB – GuestLTND, freechess.org, 2018.

8.a4 Nb6 9.Na3 Ne4 10.d3 Nd6 (10...Bf6 11.Bf6 Nf6 12.a5=) 11.0–0+= f6 (better 11...a5!?+=) 12.a5+– Nd7 13.cd5 ed5 14.Qb3 c4 (14...Qa5 15.Qd5 Rf7 16.d4+–) 15.dc4 Nc5 (15...dc4 16.Qb4+–) 16.Qb4 Nc4 (16...Nde4 17.cd5 Kh8 18.Rad1+–) 17.Nc4+– Nd3?? (better 17...dc4 18.Bd4 Ne6 19.Qc4 Qe8+–) 18.Qc3 dc4 (18...Nb2 19.Nb2 Be6+–) 19.Qc4 Kh8 20.Bd3 Bg4 (20...Bd6 21.Rfd1 Qe7 22.Qh4+–) 21.Qg4 (21.Qg4 Qd3 22.Nd4+–) 1–0. GuestFPDX – GuestCKGD, freechess.org, 2020.

8.a4 dc4 9.0–0=.

8.a4 dc4 9.Na3 c3 10.dc3 (10.Bc3 b6=) 10...Qc7 11.0–0 e5 12.Nd2 (12.Qc2 e4 13.Nd2 Qe5=) 12...e4 (12...Rd8 13.Qc2=) 13.Qc2 Qe5 14.Nac4 (14.c4 Qe6=) 14...Qe6 15.f3 (15.a5 Rd8=) 15...ef3 Black is in command 16.Bf3 (16.Nf3 h6=) 16...Ne5 17.Ne5 Qe5 18.c4 Black creates threats along the open e–file (18.Rae1 Ng4 19.Bg4 Bg4=) 18...Qe3=+ 19.Kh1 Qh6 (19...Bd6 20.Rae1 Qh6 21.Be5=+) 20.Rae1 Bd6 The mate threat is Qxh2 21.Be5 Ng4 22.Bd6 Qd6 Threatening mate: Qxh2 23.g3 (23.Bg4 Bg4 24.h3 Be6=+) 23...Qh6–/+ Threatening mate... how? 24.Bg4 Bg4 25.a5 (25.Nb3 b6–/+) 25...Rad8 (25...Rfe8 26.Re4 Rad8 27.Rfe1–/+) 26.Rf2 (26.Nb3 Qh5–/+) 26...Rfe8 27.Re4 (27.Re8 Re8 28.Qd3 Qe6–/+) 27...f5 (27...Qh5 28.Kg1–/+) 28.Re8 Re8 29.Nf1 (29.Qd3 Kh8–/+) 29...Qe6 (29...Re1 30.Qd3 Rd1 31.Qc2–+) 30.Kg2–/+ Qe4 (30...a6 31.h3 Be2 32.ba6 ba6 33.Qf5 Bc4 34.Qc5 Bd5 35.Kg1–/+) 31.Qe4 fe4 32.Rf4 (32.Ne3 Bf3 33.Kf1 Kf7–/+) 32...Be6 (32...Bf3 33.Kf2–/+) 33.Ne3 g5 (better 33...Bd7!?–/+) 34.Re4+= Kf7 35.Kf2 (35.Kf3 b6+=) ½–½. Helbich,Jan Sr – Bazant,Petr Sr, Lang mem–B 6th, 1986.

8.a4 dc4 9.Na3 c3 10.Bc3 Ne4 11.Bb2 Bf6 12.Qc2 Bb2 13.Qb2 Qf6 (13...b6 14.Nc4=) 14.Qf6+= Ndf6 15.Nc4 Rd8 16.Nfe5 Nd5 17.Bf3 Nd6 18.Nd6 Rd6 19.Ke2 Rb8 (19...f6 20.Nc4 Rd8 21.Na5+=) 20.Rhc1 f6 21.Nc4 Rd8 22.Na5 Bd7 23.Rc5 b6 24.Rd5 ed5 25.Bd5 Kf8 26.Nc6 Bc6 27.Bc6 Rd6 (27...Rbc8 28.d4+=) 28.d4 (28.a5 f5+/–) 28...a5 29.g4 Ke7 30.f4 g6 31.h4 White intends g5 31...Rg8 32.Kd3 h6 (32...f5 33.Rg1 Kf7 34.Bf3+/–) 33.e4 h5 (better is 33...Rdd8!?+/–) 34.e5+– Rdd8 35.g5 fe5 36.fe5 Rgf8 37.Ke3 Rc8 (37...Rf7 38.Be4 Rdf8 39.Rc1+– (39.Bg6?! Rf3 40.Ke4 R3f4 41.Kd5 Rh4=)) 38.Rd1 Ke6?? (38...Rf7 39.d5 Rf5+–) 39.Ke4 White prepares d5 39...Rf2 40.d5 Kf7 41.d6 Re2 (41...Rd8+–) 42.Kd5 Rc2 (42...Rd8+–) 43.e6 Kg7 44.e7 Rc5 45.Ke6 Re5 (45...Rh8 46.d7 Rf5 47.d8Q Re8 48.Qe8 Rf4 49.Rd8 Re4 50.Be4 Kh7 51.Qg6) 46.Kd7 1–0. Bulcourf,Carlos (2190) – Picollo,Pablo (1990), Villa Martelli op, 2010.

8.a4 Qc7 9.0–0 Bd6 (9...e5 10.d3=+) 10.h3 (10.d4 cd4 11.Qd4 e5=) 10...e5=+ 11.cd5 Nd5 (11...e4 12.Ne1 Nd5 13.d3 Bh2 14.Kh1=) 12.d3 (12.Nc3 Nc3 13.Bc3 Rd8=) 12...N7f6 (12...a6 13.Nbd2=) 13.Nbd2 Re8 14.Nc4 The pressure on e5 grows 14...b6 (14...Nb4 15.Nfd2=) 15.Ra2 (15.Nfd2 Qd7+=) 15...Nb4 (15...a6 16.Qb3=) 16.Ra3 Bf5 (16...Bb7 17.a5=) 17.e4 (17.a5 Rad8=) 17...Bg6 (17...Bd7 18.Qc1=) 18.Qb1 (18.a5 Rad8+–) 18...Bh5= 19.g4 (19.a5 Rad8=) 19...Bg6 20.Rc1 (20.a5 Nd7=) 20...Nd7 (20...a5 21.Nh4=) 21.Bc3 Rac8 (21...a5 22.ba6 Ra6 23.h4=+) 22.Qb2 e5 becomes the focus of attention (22.a5 Qb8+=) 22...f6 (22...Rcd8 23.a5+=) 23.Nh4 (23.a5 ba5 24.Ra5 Ra8+=) 23...Nf8 (23...Bf7 24.Nf5 Bf8 25.a5=) 24.Nf5 (24.a5 ba5 25.Ra5 Rb8+=) 24...Be7 (24...Bf5 25.gf5 Qd7 26.a5+=) 25.a5 Bf5 26.ab6 (26.gf5 ba5 27.Ra5 Qd7 28.Bb4 cb4+=) 26...ab6 27.gf5 Qd8 Attacks the backward pawn on d3 (27...Red8 28.Ne5 fe5 29.Bb4+=) 28.Bb4 (better 28.Qb3!? Kh8 29.Be5+–) 28...cb4= 29.Ra6 Bc5 (29...Nd7 30.Bh5 Rf8 31.Ra7=) 30.Ra7 (30.Nb6!? Bb6 31.Rc8 Qc8 32.Rb6+–) 30...Ra8 (30...Re7 31.Re7 Be7 32.Ne3=) 31.Ra6 Qc7 (31...Qd4 32.Bd1 Qb2 33.Nb2=) 32.Nb6 (32.Qb3 Kh8=) 32...Ra6+= 33.Nd5 Attacks the isolani on b4 33...Qa7 (33...Bf2 34.Kg2 Qd6 35.ba6+–) 34.ba6 Bf2 (34...Kh8 35.Kg2+= (worse 35.Nb4 Rb8 36.Rc4 Bf2 37.Kg2 Qe3=)) 35.Kg2 Bh4 (35...Bc5 36.Nb4 Bb4 37.Qb4+–) 36.Bf1 (36.d4 Qd4 37.Qd4 ed4+–) 36...Rb8 (36...Kh8+–) 37.Nb4 (better 37.Rc7 Qa6 38.Ne7 Kh8 39.Qb3+–) 37...Qa6= 38.Qb3 (38.Na6 Exploits the pin 38...Rb2) 38...Kh8 39.Qf7 (better 39.Na6!? Rb3 40.Rc8 Rb2 41.Kg1+–) 39...Qb6=+ 40.Nc2?? (better 40.Kh1 Qf2 41.Nc6=+) 40...Qf2–+ 41.Kh1 Bg5 42.Bg2 (42.Re1 Bf4 43.Bg2 Qc2 44.Qa7–+) 42...Bc1 43.Qc7 Rb1 (43...Rb1 44.Qg7 Kg7 45.Ne1 Qe1 46.Bf1 Qf1 47.Kh2 Bf4) 0–1. Degen,Magda – Bade,Heidrun, DDR–ch (Women), 1967.

8.a4 Qc7 9.Qc2 e5 10.d4 cd4 11.ed4 e4 12.Nfd2 dc4 13.Bc4 Qf4 14.Nc3 Now all is on e4 14...e3 15.fe3 Qe3 16.Ne2 Nb6 17.Qd3? (better is 17.Bd3!?–/+) 17...Nc4–+ 18.Qc4 Be6 (better is 18...Ng4 19.Rf1 Nh2–+) 19.Qc3+= Qg5 20.Qg3 Qf5 21.Qf3 Qc2 22.Bc3 Bg4 23.Qg3?? (better is 23.Rc1 Qc1! 24.Nc1 Bf3 25.Nf3–+) 23...Be2 24.Ke2 Ne4 (24...Ne4 25.Qe3 Nc3 (25...Qc3?! 26.Ne4 Qc4 27.Qd3+=) 26.Kf1 Rae8–+) 0–1. Petukhov,Nikolay (1815) – Marinin,Viktor (2010), RUS–ch Seniors, 2009.

8.a4 Qc7 9.cd5 ed5 10.0–0 a6=.

8.a4 Qc7 9.cd5 Nd5 10.0–0=.

8.a4 Bd6 9.0–0 e5 10.cd5 e4 11.Ne1 Qc7 12.h3 Nd5 13.d3 ed3 14.Bd3 Be5 (14...Nb4 15.Be4=) 15.Be5 Qe5 16.Nd2 Nb4 (16...Rd8 17.Nc4 Qe6 18.Nf3=) 17.Nc4 (17.Rc1 Rd8=) 17...Qd5 18.Be2 Nb6 (18...Nf6 19.Nf3=) 19.Nf3 (19.a5 Nc4 20.Qd5 Nd5 21.Bc4 Be6+=) 19...Be6 20.Ncd2 Rad8 21.a5 White gets strong initiative 21...Nc8 (21...Nd7 22.Nc4=) 22.Qb1 Qf5 (22...Rfe8 23.Rd1=) 23.Ne4 (23.Qf5 Bf5 24.Rfc1+=) 23...Nd6 (23...Ba2 24.Ra2 Na2+/–) 24.Nc5!+/– Qc5 Decoy theme: c5 25.Rc1 Bc4 26.Bc4 Nc4 27.Ra4 Qd6 (27...Qd5 28.e4 Qh5 29.Qb4+/–) 28.Rc4+– (worse is 28.Rb4 Na5 29.Ra4 b6+/–) 28...Qd1 (28...Nd5 29.e4 Nc7 30.Rc1+–) 29.Qd1 Rd1 30.Kh2 Nd3 (30...Nd5 31.Rd4 Rd4 32.Rd4+–) ½–½. Flesch,Janos – Lengyel,Levente, Hungary, 1963.

8.a4 Bd6 9.d3 e5 10.cd5 Nd5 11.Nbd2 Re8 12.Nc4 Qe7 13.Qb3 Bc7 14.0–0 Qe6 15.a5 Qh6 16.h3 Qe6 17.Rfc1 f6 18.Ncd2 Kh8 19.d4 ed4 20.Bc4 de3 21.Bd5 ef2 22.Kf2 Qf5 23.Ra4 Re7 24.Be4 Qe6 25.Qe6 Re6 26.Ba3 a6 27.b6 Bd6 28.Nb3 c4 29.Rac4 1–0. Kamminga – Evans, 1994.

8.Qc2 a6 9.ba6 b6 10.d3=.

8.Qc2 b6 9.0–0 (9.d3 Bd6=) 9...Bb7 (9...a6 10.cd5 ed5 11.Nc3=) 10.d3 (10.cd5 Nd5 11.Nc3 Bf6=) 10...Qc7 (10...Bd6 11.Nc3=) 11.Nbd2 (11.Nc3 dc4 12.dc4 Bd6=) 11...Rfd8 12.a4 (12.cd5 Nd5 13.Rfc1 a6 14.ba6 Ba6=) 12...Rac8 (12...a6 13.Rfb1=) 13.Bc3 (13.a5 Bd6+=) 13...dc4 (13...e5 14.a5=) 14.dc4+= Ne8 (14...e5 15.a5=) 15.Rfd1 Bf6 16.Nf1 (16.a5 Bc3 17.Qc3 Nef6+=) 16...Bc3 (16...Nd6 17.a5=) 17.Qc3 Ndf6 18.Ng3 Nd6 (18...Rd6 19.Rd6 Nd6 20.Rd1=) 19.Nd2 (19.a5 Nde4 20.Ne4 Rd1 21.Rd1 Ne4+=) 19...Nde4 (19...Rd7 20.a5=) 20.Nde4 (20.Nge4 Ne4 21.Ne4 Be4=) 20...Ne4 21.Qc2 (21.Ne4 Be4 22.a5 Rb8=) 21...Ng3 22.hg3 Rd1 (22...e5 23.Qf5=) 23.Rd1 Rd8 24.Rd3 g6 (24...h6 25.Qd2 Rd3 26.Qd3=) 25.Rd8 Qd8 26.Qd3 (26.Qc3 Qa8=) 26...Qd3+= 27.Bd3 g5 (27...f5 28.Kh2+=) 28.f3 (28.g4 a5=) 28...Kg7 (28...f5 29.Kf2+=) 29.g4= h6 30.Kf2 Kf6 31.g3 e5 32.e4 (32.Bf5 e4 33.f4 a5=) 32...Kg6 33.Ke3 Bc8 34.Be2 Be6 35.Kf2 f6 36.Ke3 h5 (36...Kf7 37.f4=) 37.gh5 Kh5 38.g4 (38.f4 g4=) 38...Kh4 39.Kf2 Kh3 40.Bf1 Kh2 41.Be2 Kh3 42.Bf1 Kh2 43.Be2 Kh1 (43...Bc8 44.Bd3=) ½–½. Sternik,Ryszard – Krzewski, Olsztyn Poland, 1985.

8.d3 b6 9.Nbd2 Bb7 10.0–0 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.d4 Nbd7 10.Nbd2).

8.d4 Nb6 9.Nbd2 Na4?? (better 9...cd4 10.Bd4 dc4=) 10.Qa4+– 1–0. DEFFM – GuestHFGX, freechess.org, 2018.

8.d4 Qc7 9.0–0 (9.cd5 Nd5 10.0–0=) 9...Bd6 (9...dc4 10.dc5 Nc5= (10...Qc5?? 11.Ba3 Qa3 12.Na3 Ba3 13.Bc4+–)) 10.cd5+= ed5 11.dc5 Bc5 12.Nbd2 Bd6 (12...a6 13.Qa4+=) 13.Rc1 Qb8 14.Qc2 (14.h3 Ne5+–) 14...Ne5 15.Bd3 (15.Rfd1 Re8+=) 15...Bg4 16.Ne5 Be5 17.h3 Be6 18.Be5 Qe5 19.Nf3 Qd6 20.Qc7 Qa3 21.Rc3 Qa2 22.Qb7 Rab8? (better 22...Bd7!?+=) 23.Qe7+– Rfe8 24.Qb4 a5 (24...Qa6 25.Nd4 Qb6 26.Ra1+–) 25.Qa3 Qa3 26.Ra3 Bd7 (26...Ne4 27.Ra5 Nc5 28.Be2+–) 27.Ra5 Ne4 28.Rc1 Re6 (28...Rb7 29.Nd4+–) 29.Nd4 Reb6 30.Rc7 Be8 31.Nc6 Nd6 (31...R6b7 32.Ne7 Kf8 33.Nd5 Rc7 34.Nc7 Nd6+–) 32.Nb8 Rb8 33.Ra6 Nb5 (33...Nc8+–) 34.Bb5 Bb5 (34...Rb5 35.Ra8 Kf8 36.Rcc8 Rb1 37.Kh2+–) 35.Rb6!! Re8 (35...Rb6 36.Rc8 Mate attack) 36.Rb5 d4 (36...h6 37.Rd5 g5 38.Rdd7+–) 37.ed4 Re1 (37...g6 38.Rbb7 Rf8 39.d5+–) 38.Kh2 (38.Kh2 Re8 39.d5+–) 1–0. DEFFM – GuestNQLD, freechess.org, 2019.

8.d4 Ne4 9.Nc3 (9.0–0 dc4 10.Bc4 Nd6=) 9...Qa5 (9...cd4 10.Qd4 Qa5 11.Rc1–/+ (11.cd5? Bf6 12.Qe4 Bc3 13.Kf1 Bb2–+)) 10.Qc2 cd4 11.Nd4 Bb4 12.Rc1 (12.0–0 Bc3 (worse is 12...Nc3 13.Bc3 Bc3 14.Nb3=) 13.Nb3 Qb4–+) 12...Qa2 13.0–0 (13.cd5 Qd5 14.0–0 Bc3 15.Bc3 Nc3 16.Qc3 Qg5+=) 13...Bc3 14.Bc3 Qc2 (14...Nc3? 15.Qc3 e5 16.Rc2 ed4 17.ed4 (17.Ra2?? dc3 18.cd5 Nf6–+) 17...Qc2 18.Qc2+–) 15.Rc2 (15.Nc2?? Nc3 16.Bf3 a5–+) 15...Nc3 16.Rc3 dc4 17.Bc4 (17.Rc4 Rd8+=) 17...Nb6 18.Ra1 Bd7 19.Be2 (19.Bd3 Rfc8 20.Rca3 e5=) 19...e5 (19...Rfc8 20.Rc8 Bc8 21.Bd3+=) 20.Nf3 f6 Black fights for the Initiative 21.Rca3 (21.Rc7 Rfb8=) 21...Nc8 22.Bc4 (22.Rd1 Be6+=) 22...Kh8 23.Bd5 Rb8 (worse is 23...Bb5 24.Bb7 Rb8 25.Bc8 Rfc8 26.Ra7=) 24.Rb1 Rd8 25.Bc4 (25.e4 Bg4–/+) 25...Nd6 26.Bf1 Nb5 The passed pawn on a7 will quickly become a dangerous weapon 27.Bb5 (27.Rb5 Bb5 28.Bb5 Rd1 29.Bf1 a6–/+) 27...Bb5–+ 28.Ra7 Bc6 (28...Be2 29.Re1 (29.Rab7?? Rb7 30.Rc1 Rb2–+) 29...Bf3 30.gf3–+) 29.Ne1 (29.Kf1 Ra8 30.Ra8 Ra8–/+) 29...b5 30.Ra6 (30.f3 b4–+) 30...Bd5 (30...Be4 31.Rba1–+) 31.Rb4 Bc4 32.Ra1 Ra8 (32...Rd7 33.f4–+) 33.Rab1 (33.Ra8 Ra8 34.f4 e4–+) 33...Ra4 (33...Kg8 34.R4b2–+) 34.Ra4 (34.f4 ef4 35.ef4 Rb4 36.Rb4 Rd4–+) 34...ba4 35.Nc2 (35.Ra1 Bb3–+) 35...Bb3 (35...Ba2 36.Ra1–+) 36.Na1 (36.Na3 Rd2–+) 36...Rd1 37.Rd1 Bd1 38.Kf1 Bh5 39.Ke1 Kg8 40.Kd2 Kf7 41.Nc2 Ke6 42.Kc3 Kd5 (42...Kd5 43.Kb4 Ke4–+; 42...f5 43.Ne1–+) 0–1. Thiele,Erich – Schnabel, corr, 1973.

8.cd5 ed5 9.0–0 Re8=.

8.0–0 b6

9.a4 a6 10.Nc3=.

9.a4 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.a4 Nbd7).

9.Qb3 Bb7 10.Nc3 (10.cd5 Nd5 11.d4 a6=) 10...Re8 (10...dc4 11.Qa4=+) 11.cd5= ed5 12.d4 c4 13.Qc2 a6 14.a4 a5 15.Ba3 Bb4 16.Qb2 Bc3 17.Qc3 Ne4 18.Qc2 Bc8 19.Nd2 Ndf6 20.Ne4 Ne4 21.f3 Nd6 22.e4 de4 23.fe4 Ne4 24.Rad1 (24.Qc4 Be6 25.Qd3 Rc8=) 24...c3=+ 25.Bc4 Nf6 (25...Ra7!? 26.Rf4 Rc7 27.Bf7 Rf7 28.Re4 Re4 29.Qe4 Bf5=) 26.Qc3= Nd5 (26...Bg4 27.Rd2=) 27.Qf3 (27.Rf7! Be6 28.Bd5 Bd5 29.Rf2+–) 27...Be6= 28.Rde1 Rc8 29.Rc1? (better 29.Bd5!? Qd5 30.Qd5 Bd5 31.Re8 Re8 32.Rc1=) 29...Rc4–/+ 30.Rc4 Ne3 31.d5 Bd5 (31...Bd5 32.Rd4 Bf3 33.Rd8 Rd8 34.Rf3 Rd1 35.Kf2 Ng4 36.Kg3 h5–/+; 31...Nc4?! 32.de6 f6 33.e7 Qd4 34.Kh1 Na3 35.Qa3=) 0–1. Senkyr,Vladimir (2185) – Sabol,Marian (2350), CZE–chT2D, 2009.

9.Qc2 a6 10.cd5 ed5 11.Nc3=.

9.Qc2 Bb7 10.d3 Re8 11.Nc3 Bd6=.

9.Qc2 Bb7 10.d3 Re8 11.Nfd2 a6 12.ba6 Ra6 13.d4 dc4 14.Bc4=+.

9.Qc2 Bb7 10.d3 Re8 11.Nfd2 (11.Nc3 Bd6=) 11...Qc7 (11...a6 12.ba6 Ra6 13.d4 dc4 14.Bc4=+) 12.f4 (12.cd5 ed5 13.Nf3 Bd6=+) 12...Bd6 (12...e5=+) 13.g4 (13.Bf3 e5=) 13...Nf8 (better 13...d4!? 14.Ne4 Ne4 (14...de3?! 15.Nd6 Qd6 16.g5=) 15.de4 e5–/+) 14.g5 (14.Bf6 gf6 15.Bf3 f5=) 14...N6d7 15.Bf3 e5 (15...Rab8 16.Rf2=) 16.cd5 (16.Bd5 Bd5 17.cd5 ef4=) 16...ef4 17.e4 Ne5 (17...Qd8 18.Nc4 Be5 19.Qg2=+) 18.Nc4 Nc4 (18...a6 19.Nba3=) 19.dc4 Be5 (19...Ng6 20.Bh5=) 20.Nd2 (20.Qg2 a6=) 20...Qe7 21.Kh1 (21.Bg2 Bb2 (worse 21...Qg5 22.Nf3 Qh5 23.Be5 Re5 24.Ne5 Qe5 25.Qf2+–) 22.Qb2 Ng6=+) 21...Qg5=+ 22.Be2 (22.Bg2 Bb2 23.Qb2 Nd7=+) 22...Qf6 (22...Bb2 23.Qb2 Ng6 24.Rad1=+) 23.Be5 Qe5 24.Bd3 Ng6 25.Nf3 Qf6 (25...Qd6 26.Rae1=+) 26.Rae1 Ne5 27.Qc3 (27.Ne5 Qe5 28.Qf2 a6 29.ba6 Ra6 30.Qf4 Qf4 31.Rf4 Ra2=) 27...Bc8 (27...a6 28.ba6 Ra6 29.Ne5 Ra2 30.Qc1 Rh2 31.Kh2 Qh4 32.Kg2 Qg3 33.Kh1 Re5 34.Be2 Qh4 35.Kg2 Rg5 36.Bg4 Qg4 37.Kh2 Qg2) 28.Qd2 (28.Ne5 Bh3 29.Rf2 Re5=+ (29...Qe5?! 30.Qe5 Re5 31.Rf4=)) 28...Nf3 (28...Bh3 29.Rf2 Ng4 30.Rfe2=+) 29.Rf3= g5 30.Rg1 Kf8 31.e5 (31.Qf2 h6=+) 31...Qe5 (31...Re5 32.Bh7 Ke8 33.Re1–/+) 32.Bh7=+ Bf5 (32...a6 33.ba6 Ra6 34.Bd3=+) 33.Bf5 Qf5 34.Qd3 (34.Qg2 Qe4=+) 34...Qd3–/+ 35.Rd3 f6 36.h4 Re5 37.d6 (37.h5 Ke7–/+) 37...Kf7–/+ 38.Rd5? (better 38.Kg2–/+) 38...Rd5–+ 39.cd5 Kg6 40.Re1 Rd8 41.Re7 (41.hg5 fg5 42.Re6 Kf5–+) 41...Rd6 42.Ra7 Rd5 43.hg5 Rg5 (43...fg5 44.Ra6 Rd6 45.Kg2–+) 44.Rd7 (44.Ra3 Kf5 45.Rd3 Ke5–+) 44...f3 45.Rd2 Kf5 46.a4 (46.Rc2 Ke4 47.a4 Kd3–+) 46...Ke4 47.a5 ba5 (47...Ke3!? 48.Ra2 f2 49.Ra3 Ke4 50.Ra1 ba5 51.b6–+) 48.b6 Rg8 (48...c4 49.Kh2–+) 49.Rc2 Kd4 (49...Ke3 50.Rc3 Kf2 51.Rc2 Ke1 52.Rc1 Kd2 53.Ra1–+) 50.Rd2 (50.Ra2 Rb8 51.Ra5 Rb6–+) 50...Ke3 51.Ra2 f2 52.Ra3 Kd4 53.Ra1 c4 54.b7 c3 55.Kh2 c2 (55...c2 56.Kh3 Ke3–+) 0–1. Schumacher,Dirk – Roeder,Philipp, Landesliga LL, 2000.

9.Qc2 Bb7 10.cd5 Nd5 11.Nc3 Bf6=.

9.Nc3 a6 10.Qc2 ab5 11.Nb5 Bb7 12.a4 Ng4 (12...dc4 13.Qc4 Ra5 14.Rfb1=) 13.cd5 Bd5 14.e4 Bb7 15.h3 Ngf6 16.d3 Re8 17.Rfd1 Nh5 (17...Qb8 18.Bc3=) 18.Qd2 (18.d4 Nhf6 19.Nc3 Qc7=) 18...Bc6 19.e5 g5 20.g3 Ng7 21.Qc2 Nf5 (21...f5 22.ef6 Bf6 23.d4+=) 22.g4 Nh6 23.d4 Bd5 24.Nc3 Qc8 (24...c4 25.Nd2 Rc8 26.Nb5+=) 25.Nd5+/– ed5 26.Bb5 Rd8 27.Qd2 cd4 (better is 27...Nf8+=) 28.Rac1 Nc5 29.Nd4 (29.Bd4?! Ng4 30.Rc3 Nh6 31.Bc5 bc5+=) 29...Qc7 (29...Rf8 30.a5! Ng4 31.Nc6+– (31.hg4?! Qg4 32.Kf1 Qh3 33.Ke2 Qh5 34.Ke1 Ne4+=)) 30.Ba3 (30.f4!? Kg7+–) 30...Qe5 (30...Ra4?? 31.Ba4 Ra8 32.Qc2+–) 31.Nc6 Qf6 32.Bb2 Qe6 (32...d4 33.Nd8 Rd8 34.Bd4 Qf3+–) 33.Rc5 bc5 34.Re1 Qe1 35.Qe1 Bd6 36.Qe3 Bf4 37.Ne7 (37.Qc5 d4+–) 37...Kf8 38.Qc5 Bd6 39.Qd4 (39.Qd4 Bh2 40.Kh2+–) 1–0. marekt – groove_rider, internet, 2012.

9.Nc3 dc4 10.Bc4 Bb7 11.d4 Qc7 12.Be2 Rfd8 13.Rc1 Rac8 14.Qa4 Qb8 15.Rfd1 cd4 16.ed4 (16.Nd4 Nc5 17.Qc2 Bd6=) 16...Nd5 (16...Bd6 17.Ba3=+) 17.Nd5 Bd5 18.Ne5 Ne5 19.de5 Bc5 (19...Qb7 20.Rc8 Rc8 21.f3=) 20.Rd3 (20.Bd3 Qa8 21.Qh4 g6=) 20...Be7 (20...Qa8 21.Bf1=) 21.Rcd1 Rc4 22.Qa6 (22.Qb3 Qc7 23.Rd5 Rd5 24.Bc4 Rd1 25.Qd1 Qc4=) 22...Rc2=+ 23.R3d2 Rdc8 (23...Rb2!? 24.Rb2 Qe5–/+) 24.Qa4= Rd2 25.Rd2 Qb7 26.Qg4 (26.f3 Bc5 27.Kh1 Qe7=) 26...Be4 (26...Ba2 27.Bd3=+) 27.h4 Bf5 28.Qd4 h6 29.Bf3 Qb8 30.Qa4 Rc7 31.Bc6 Qc8 32.Ba3 (32.g4 Bg6 33.h5 Bh7+–) 32...Ba3= 33.Qa3 a6 34.Qa6 (34.Qd6 ab5 35.Bb5 Rc1 36.Kh2 Qc3=) 34...Qa6 (better 34...Rc6 35.bc6 Qa6 36.Rd8 Kh7–+) 35.ba6 Rc6 36.Rd8 Kh7 37.a7 Rc1 38.Kh2 Be4 39.f3 Bc6 (better 39...Rc7!? 40.a8Q Ba8 41.Ra8 Rc5=) 40.Rc8+– Ra1 41.Rc6 Ra2 42.Rc7 b5 (42...Kg6 43.Kg3+–) 43.Rf7 (43.h5 b4+–) 43...b4 (43...Kg6 44.Rb7+–) 44.Re7 b3 45.Re6 Ra7 46.Rb6 Ra5 47.f4 Ra4 48.Kg3 (48.Rb3?! Rf4 49.Re3 Rh4 50.Kg3 Rb4+–) 48...g5 (48...Ra3 49.Kg4+–) 49.hg5 hg5 50.f5 Rf4 51.f6 Re4?? (51...Rf5 52.e6 Rf6+–) 52.e6 b2 (52...Re6 53.Re6 Kh6+–) 53.Rb2 (better 53.f7 Re6 54.f8N Kh6 55.Ne6 Kg6+–) 53...Kg6 (53...Re6 54.Rf2 Kg8+–) 54.f7 Kg7 55.Rb8 (55.Rb8 Rf4 56.Rg8 Kf6 57.f8Q Ke6 58.Qc8 Kf6 59.Qc6 Kf5 60.Rf8 Ke5 61.Re8 Kd4 62.Rd8 Ke3 63.Qc5 Ke2 64.Qc2 Ke3 65.Qd3) 1–0. Demoulin,Joachim (2080) – Luyten,Rudi, Belgian championship, open section, 1996.

9.d4 a6 10.Nc3 ab5 11.Nb5 Bb7=.

9.d4 a6 10.cd5 Nd5 11.Nbd2 (11.Nc3 Bb7=) 11...ab5 12.Bb5 Nc7 (12...Ba6 13.Ba6 Ra6 14.Qe2=) 13.Bc6 Rb8 (13...Ra6 14.Qb3=) 14.Qc2 (14.Qa4 b5 15.Qc2 Na6 16.dc5 Nac5=) 14...Bb7 15.Bb7 Rb7 16.a4 (16.Rfd1 Qa8=) 16...cd4 (16...Nd5 17.e4 Nb4 18.Qb3=) 17.Nd4 (17.Bd4 Qa8+=) 17...Nd5 (17...Nc5 18.Rfd1=) 18.Nc6+= Qe8 19.Ne7 (19.e4 Nb4 20.Qc3 e5 21.Nb4 Bb4 22.Qb4 Ra7+–) 19...Qe7= 20.Ba3 Nc5 21.a5 Nc7?? (21...ba5 22.Bc5) 22.ab6+– N7a6 23.Nb3 Rc8 (23...Rb6 24.Nc5 Qc7 25.Rfc1+–) 24.Nc5 (24...Rc5 25.Bc5+–) 1–0. pcmvr (2760) – pushtiu (2265), net–chess.com, 2006.

9.d4 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 Be7 7.Be2 0–0 8.0–0 d5 9.d4 Nbd7).

9.d4 cd4 10.Nd4 Bb7 11.Nc6 Bc6 12.bc6 Nb8 (12...Nc5 13.Qc2=+) 13.cd5 ed5 (13...Nd5!? 14.Bb5 Bf6 15.Bf6 Qf6–/+) 14.Qa4+= Qc7 15.Rc1 Bc5? (better 15...Rc8+=) 16.Bf6+– gf6 17.Qg4 Kh8 18.Qf5 Rg8 19.Qf6 (19.Nc3 Qc6 20.Bd3 Rg7+–) 19...Rg7 20.Nc3 Nc6 21.Nd5 Qe5?? (better 21...Qb7+–) 22.Qc6 Rag8 (22...Rd8 23.Bf3+–) 23.Bf3 Rg6 24.Qd7 (24.Qb5 Rd8 25.Rd1 Rh6+–) 24...Bd6 (24...Rd6 25.Qb7+–) 25.Nf4 (25.Qa7?! Rg2 26.Bg2 Qd5=) 25...R6g7 (25...Rf6 26.Qa7 Qf5 27.Rc4+–) 26.Qa7 Qf6 (26...b5 27.Rd1+–) 27.Qb6 Qe7 (27...Rb8 28.Qc6+–) 28.Rd1 (28.Qb7 Qe8+–) 28...Bf4 (28...Be5 29.Rac1+–) 29.ef4 Qh4 (29...Rg6 30.Qd4 f6 31.a4+–) 30.Qd4 Qh3 (30...Rc8+–) 31.Qg7! Rg7 (31...Rg7 32.Rd8 Combination; 31...Kg7 32.gh3 Combination) 32.Rd8 Rg8 33.Rg8 (33.Rg8 Kg8 34.gh3+–) 1–0. DEFFM – GuestBXMF, freechess.org, 2018.

9.cd5 ed5 10.Nc3 Bb7 11.d4 c4 12.Qc2 Re8 13.Nh4 Bb4 14.Nf5 Bc3 15.Bc3 Ne4 16.Bb4 g6 (16...Qg5 17.Nd6 Nd6 18.Bd6=) 17.f3 gf5 18.fe4 fe4 19.Bh5 Nf6 20.Qf2 (20...Nh5 21.Qf7 Kh8 22.Qb7= (< 22.Qh5 Rg8 23.Qe5 Rg7+–)) 1–0. Crapov – playwaycool, ChessWorld.net, 2006.

9.cd5 ed5 10.Nc3 Re8 11.Qa4 Bd6 12.d4 Qc7 13.dc5 bc5 (< 13...Qc5 14.Rfd1 Bb7 15.Rac1+/–; < 13...Bc5 14.Rfd1 Bb7 15.Rac1+/–) 14.Rfd1 Nb6 15.Qh4 Bf5 16.a4 Be7 17.a5 Nbd7 18.Qa4 Be4 19.h3 Bf8 20.Ng5 h6 (20...Qe5 21.f4 Qe7 22.Nce4 Ne4 23.Ne4 de4 24.b6+/–) 21.Nge4 (21.Nce4?! de4 22.h4 Bd6=) 21...de4 22.Bc4 Ne5 (22...Rad8 23.Nd5 Nd5 24.Bd5+/–) 23.Nd5+– Nd5 24.Bd5 (24.Rd5?! Nc4 25.Qc4 Rad8+=) 24...Rad8 25.Be4 c4 26.Rd8 Rd8 27.Rc1 Rc8 (27...Bc5 28.Be5 Qe5 29.Qc4+–) 28.b6! ab6 (28...Qb6 29.ab6) 29.ab6 Qd6 30.b7 Rb8 31.Be5 Qe5 32.Qc4 g6 (32...g5 33.Qd4 Qd4 34.ed4+–) 33.Qd5 Qd5 34.Bd5 Bd6 (34...Kg7 35.Rc7 g5 36.f4+–) 35.Rc6 (35…Be5 36.f4+–) 1–0. marekt (2205) – ironkosta (2055), ICC, 2003.

9.h3 Bb7 10.Qc2 a6 11.Na3 Qc7 (11...dc4 12.Rfc1+=) 12.cd5= ed5 13.ba6 Ba6 14.Nb5 Qc6 15.Nfd4 Qc8 16.a4?? (better is 16.Nf5 Qd8 17.Rfb1+=) 16...cd4–+ 17.Qc8 Rfc8 18.Bd4 Bb5 19.ab5 Ra1 20.Ra1 h6 21.Bc3 Ne4 (better is 21...Rc7!?–+) 22.Ra7–/+ Nc3 (better is 22...Rd8 23.Bg4 Nec5–/+ (worse is 23...Nc3 24.dc3 Bf6 25.Bd7+=)) 23.dc3+= Rd8 24.Bg4 Nf6 (better is 24...Bf6!? 25.Bd7 Bc3+=) 25.Re7+/– Ng4 26.hg4 Rc8 27.Rb7 Rc3 28.Rb6 The passed pawn on b5 will quickly become a dangerous weapon 28...Kf8 29.Rb7 Ke8 30.Kf1 Rb3 31.b6 Kd8? (better is 31...Rb2!?+–) 32.Rf7 Rb6 33.Rg7 Rb4 34.Rg6 Ke7 35.f3 (35.f3 Rb1 36.Kf2 Rb2 37.Kg3+–) 1–0. Woelfelschneider,Peter – Ziede, 2009.

9.a4 a5

10.Qc2 Ne4 (10...Bb7 11.Nc3=) 11.d3 Nd6 12.Nbd2 Bf6 13.Rfd1 (13.Bf6 Qf6 14.cd5 ed5=) 13...Bb7 14.Rac1 (14.cd5 ed5 15.d4 Rc8 16.dc5 Nc5=) 14...Qe7 (14...Rc8 15.Bc3=) 15.Ba3 dc4 16.Nc4 Nc4 17.Qc4 Bf3 (17...Rfd8!?=) 18.Bf3+= Ne5 19.Qe4 Nf3 20.Qf3 Rad8 (20...Rac8+=) 21.h3 (21.d4 Rc8+/–) 21...Rd5 (21...e5!?=) 22.d4+= Rfd8 (22...Rc8!?+=) 23.dc5+/– Rd3 24.Rd3 Rd3 25.Qa8 (25.cb6 Qa3 26.Rc8 Rd8+–) 25...Qd8? (better is 25...Rd8 26.Qa6 Qf8+/–) 26.Qd8+– Bd8 27.cb6 Bb6 28.Kf1 (28.Rc8!? Rd8 29.Rc6 Ba7+–) 28...f6 29.Bc5 Bc5 (29...Bd8 30.Ke2 Rd7 31.Rd1 Rd1 32.Kd1+–) 30.Rc5 Ra3 (30...Rb3 31.Rc8 Kf7+–) 31.b6 (31.b6 Rb3 32.Rb5+–) 1–0. Strebel,Harry – Stassen,Arno, RH–chA Wallertheim, 1992.

10.Nc3 Bb7=.

10.d3 Bb7 11.Nbd2 Qc7 (11...Bd6 12.Qc2=) 12.Rc1 (12.cd5 Nd5 13.Rc1 Rad8=) 12...Rad8 13.Qc2 Qb8 (13...dc4 14.Nc4 Ng4 15.Ncd2=) 14.Rfd1 (14.cd5 Nd5 15.Nc4 Nb4=) 14...Bd6 15.cd5 Nd5 (15...ed5 16.Qc3=) 16.Nc4 (16.Ne4 e5=) 16...Bc7 (16...Nb4 17.Qc3 Nf6 A) worse is 18.Nd6 Na2 (18...Qd6?! 19.Qb3+=) 19.Qd2 Nc1 (19...Qd6 20.Be5 Nc1 21.Bd6 Ne2 22.Qe2 Bf3 23.Qf3 Rd6 24.Qf4+/–) 20.Nb7 Ne2 21.Qe2 Qb7–/+; B) 18.Qb3=) 17.g3 (17.h3 e5=) 17...Qa8 (17...Nb4 18.Qb1=) 18.e4 (18.Ng5 h6 19.Ne4 Nb4=) 18...Nb4 19.Qc3 (19.Qd2 f6=) 19...Nf6 (19...e5 20.Qb3 (worse is 20.Nfe5 Na2 21.Qb3 Nc1 22.Rc1 Be5 23.Ne5 Ne5 24.Be5 Qa7+=) 20...Qb8 21.Nh4=) 20.Qe1 Ne8 21.Bf1 f5 (21...f6 22.Qe3=) 22.Ng5+= Qc8 23.ef5 Rf5? (23...ef5!? 24.Ne6 Nd6 25.Nd8 Nc4 26.dc4 Bd8+–) 24.Qe6 (24.Ne6!? Bf3 25.Nd8 Qd8+–) 24...Qe6 25.Ne6 Rd7 (better is 25...Rb8+–) 26.Nc7 Nc7 (26...Rc7 27.Re1 Nf6 28.Nb6+–) 27.Bh3 (27.Bh3 Rdf7 28.Bf5 Rf5 29.Nb6+–) 1–0. Bulcourf,Carlos (2295) – Maggiolo,Sonia, Florida Valle op, 1993.

10.d4 Ra7 A) 11.Nc3 Bb7 (11...dc4 12.Bc4 Rc7 13.d5 ed5 14.Nd5 Nd5 15.Qd5 Bf6 16.Bf6 Qf6 17.Qh5=) 12.Rc1 dc4 13.Bc4 Qa8 14.dc5 Nc5 15.Be2 Rc8 16.Qc2 Nfe4 17.Ne4=+; B) 11.Ne5 Ne5 (11...Qe8 12.Nc6 Rc7 13.dc5 Bc5 14.cd5 Nd5 15.Bf3 Nb4 16.Bc3 Bb7 17.Nb4+=) 12.de5 Ne8 13.Qc2 Rd7 14.Bd3 h6 15.cd5 ed5 16.Rd1 Nc7 17.Nc3=.

10.d4 Bb7 11.Nbd2 (11.cd5 Bd5 (11...Nd5 12.Nc3 Rc8 13.Rc1 Re8 14.Bc4 N7f6 15.dc5 Bc5 16.Nd5 Nd5 17.Qe2=) 12.Nc3 Bb7 13.Qd2 Rc8 14.Rac1 Qc7 15.Rfd1 Rfd8 16.Qc2 Bd6 17.h3=) 11...Rc8 (11...cd4 12.Bd4 Bd6 13.cd5 Bd5 14.Nc4 Qb8 15.Bb2 Rd8 16.Nd6 Qd6 17.Qd4=) 12.Rc1 h6 (12...cd4 13.Bd4 Ba3 14.Rc2 Qe7 15.cd5 e5 16.Ba1 Bd5 17.Nc4=) 13.Ne5 (13.Re1 cd4 14.Bd4 Bb4 15.cd5 Bd5 16.Rc8 Qc8 17.Rf1=) 13...Ne5 (13...cd4 14.Bd4 Ne5 15.Be5 Nd7 16.Bc3 Nc5 17.Bd4=) 14.de5 Nd7 15.f4 (15.cd5 ed5 16.Bg4 Rc7 17.e6=) 15...Re8 (15...Qc7 16.cd5 ed5 17.Bg4=) 16.Bf3 Nf8 (16...Rc7 17.Qc2=) 17.Re1 (17.Qc2=) 17...Qd7 (17...Qc7!?=) 18.cd5+= ed5 (18...Bd5!? 19.e4 Bb7+–) 19.Bg4+– Qd8 20.Bc8 Bc8 21.Nf3 Bf5 22.Qe2 Ne6 23.Red1 Qa8 24.h3 Rd8 25.g4 Be4 26.Nd2 Bh7 27.f5 Nc7 28.Qf3 Bf8 29.Nb3 Qc8 30.Bc3 Kh8 31.Na5! ba5 32.Ba5 Rd7 33.Bc7 Qc7 34.Rd5 Rd5 35.Qd5 Bg8 36.Kg2 Be7 37.Rb1 (37.f6 gf6 38.ef6 Bf6 39.Rc5 Qa5+–) 37...Qb6 (37...Qa5 38.Qe4 Qd2 39.Kh1 Bh4+–) 38.a5 Qa5 39.b6 Qc3 40.Kf3 Bg5 (better 40...Qc2!? 41.Qe4 Qh2+–) 41.Qe4+– (41.Qe4 Bd8 42.f6+–) 1–0. gdriessen (1925) – devonmichael (1825), gameknot.com, 2014.

10.d4 dc4 A) 11.Na3 Bb7 (11...c3 12.Bc3 Bb7 13.Nc4 Bd5 14.Qc2 Ne4 15.Rfd1 Rc8 16.Rac1 Nc3 17.Qc3=) 12.Nc4 Bd5 13.Rc1 Rc8 14.Qc2 cd4 15.Bd4 Ba3 16.Rcd1 Bd6 17.Bd3=; B) 11.Nbd2 Bb7 (11...c3 12.Bc3 Bb7 13.Nc4 Bd5 14.Qc2 Ne4 15.Rfd1 Rc8 16.Rac1 Nc3 17.Qc3=) 12.Nc4 Nd5 13.Rc1 Rc8 14.dc5 Nc5 15.Bd4 f6 16.Bc5 Bc5 17.Nd4=.

10.d4 Qc7 A) 11.cd5 Nd5 (11...ed5 12.dc5 bc5 13.Nc3 Nb6 14.Rb1 Rb8 15.Qc2 Bd6 16.h3 Be6 17.Rfd1=) 12.Nbd2 Bb7 13.Rc1 Rac8 14.e4 N5f6 15.Bd3 Qf4 16.Qe2 cd4 17.Bd4=; B) 11.dc5 Nc5 (11...Bc5 12.cd5 Nd5 13.Nbd2 Bb7 14.Rc1 Rac8 15.Qb3 Rfd8 16.Rfd1 N5f6 17.Qc4= 0.) 12.Be5 Qd7 13.Nbd2 Bb7 14.Nb3 Nb3 15.Qb3 Rac8 16.Rfd1 Rfd8 17.cd5=.

10.d4 Re8 A) 11.dc5 Bc5 (11...Nc5 12.Ne5 Bb7 13.Nc6 Qc7 14.Be5 Bd6 15.Bd6 Qd6 16.cd5 Qd5 17.Nc3=) 12.cd5 Nd5 13.Nc3 Bb7 14.Bd3 Nc3 15.Bc3 Rc8 16.Qe2 Bd6 17.Rfc1=; B) 11.cd5 Nd5 (11...ed5 12.dc5 Nc5 13.Nbd2 Nfe4 14.Nd4 Bd6 15.N2f3 Qf6 16.Rc1 Qg6 17.Ne1=) 12.e4 Nf4 13.Bc4 Bb7 14.Nbd2 Rc8 15.Rc1 cd4 16.Bd4 Nc5 17.e5=.

8.0–0 Nb6

9.Na3 a6 10.ba6 ba6 11.Qc2 Bb7 12.Rab1 Qc7? (better 12...Rb8!?+=) 13.Be5 (better 13.Bf6 gf6 14.Qb2+–) 13...Qd7?? (better 13...Qc6 14.Qb2 Bd8+–) 14.Rb6+– d4 (14...Bc6 15.Rfb1+–) 15.Ng5 (15.Qb2 Be4 16.d3 Bc6+–) 15...g6 (15...h6 16.Rfb1 Ra7 17.Bf3 Bf3 18.Nf3 (18.gf3?! hg5 19.ed4 cd4=) 18...de3 19.de3+–) 16.Rfb1 (16.ed4 cd4 17.Qd3 Qc8+–) 16...Bc6 17.Bf3 Bf3 18.Nf3 (worse 18.gf3 Qc8 19.Rb8 Rb8 20.Rb8 Qc6 21.Rf8 Kf8 22.Bf6 Bf6 23.Nh7 Ke7 24.Nf6 Kf6+–) 18...Ng4 (18...de3 19.fe3 Rfd8 20.Rb7+–) 19.Rb7 Qd8 (19...Qe8 20.Bf4+–) 20.Bg3 (20.Bc7 Qe8+–) 20...Bf6 (20...de3 21.de3 Bd6 22.Bd6 Qd6 23.R7b6+–) 21.Qe4 Qa5 (21...de3 22.Qg4 ed2 23.Rd1+–) 22.Qg4 Qa3 23.Bd6 Rfd8 (23...Qa2 24.Qf4 Bg7 25.Bc5 Qc4 26.Bf8 Rf8+–) 24.Qf4 Rd6 25.Qf6 Rf8 26.Rf7! Qc1 (26...Rf7 27.Rb8 Mate attack) 27.Rc1 Rf7 28.Qe5 Rfd7 29.Rb1 de3 (29...Rd8 30.Rb7 R8d7 31.Rd7 Rd7 32.Qe6 Kg7 33.Qd7 Kf6 34.Qd6 Kf7 35.Ne5 Kg7 36.Qe7 Kh6 37.h4 de3 38.Ng4 Kh5 39.Qg5) 30.Rb8 (30.Rb8 Rd8 31.Qd6 Rb8 32.Qb8 Kg7 33.Qe5 Kg8 34.Qe6 Kf8 35.Qf6 Kg8 36.Ng5 ef2 37.Kf2 h5 38.Ne6 a5 39.Qg7) 1–0. Silva,Janderson Rossi Da (1805) – Sorrentino,Umberto, Brazil Telecom Sesc Open, 2016.

9.a4 a5 10.ba6 (10.d3 Bd6=) 10...Ra6 (better 10...Nc4 11.Bc4 dc4 12.ab7 Bb7=) 11.a5?? (better 11.cd5 Ra5 12.de6 Be6 13.d4+=) 11...Nc4–/+ 12.Bc4 (12.Bc3 b5 13.ab6 Ra1 (worse 13...Rb6 14.Bc4 dc4 15.Ba5+–) 14.Ba1 Nb6–/+) 12...dc4 13.Qc2 Ra5 14.Qc4 (14.Ng5!? g6 15.Ra5 Qa5 16.Qc4–/+) 14...b5–+ 15.Qe2 Ba6 (15...Ra1 16.Ba1 c4 17.Rd1–+) 16.Qd1 (16.Ra5!? Qa5 17.d3–/+) 16...b4 (16...Ra1 17.Ba1 b4 18.Re1–+) 17.Re1 (17.Ra5 Qa5 18.Re1 c4–+) 17...Bd3 (17...Ra1 18.Ba1 Bd3 19.Ne5–+) 18.Ra5 Qa5 19.Ne5 c4 (19...Qa6 20.Nd3 Qd3 21.Qf3–+) 20.Nd3 cd3 21.Qb3 (21.e4 Rc8–+) 21...Rd8 (21...Qd5 22.Qa4–+) 22.Rc1 (22.e4 Qg5 23.Bf6 Qf6–+) 22...Ne4 (22...Qd5 23.Qd1–+) 23.Bd4 (23.Rc4 Qh5 24.Re4 Qe2–+) 23...Nc5 (23...e5 24.Bb2–+) 24.Qb2 (24.Qc4 Rd5–/+) 24...Na4 (24...Bf8 25.Bc5 Bc5 26.Qe5–+) 25.Qa1 (25.Qb3 Bd6 26.f4 Bc5–+) 25...f6 (25...Bf8 26.Be5–+) 26.h3 (26.Qa2!? Qa6 27.Qb3–/+) 26...e5 (26...Rb8 27.e4–+) 27.Qa2 (27.Bb6 Qb6 28.Qa4 Qb7–+) 27...Kf8 28.Bc5?? (better 28.Bb2–+) 28...Bc5 29.Rc5 (29.Qc4–+) 29...Qc5 30.Qa4 Qc1 31.Kh2 Qb1 32.Qc6 (32.Qa5 Re8–+) 32…Qc2 (32...Qc2 33.Qb6 Rc8 34.Qb4 Kg8–+) 0–1. GuestRZGB – kiyoshi, freechess.org, 2016.

9.a4 dc4 10.a5= Nbd5 11.Ne5 a6 12.b6 Bd7 (12...Nb4 13.Nc4 Bd7 14.Nc3=) 13.Bc4+= Rc8 14.Qf3 (14.Nc3 Bd6 15.Nd7 Qd7+=) 14...Bc6 15.Nc6 (15.Nc3 Nb4 16.Qd1 Bd5+=) 15...Rc6 16.e4 (16.Rd1 Nb4=) 16...Nb4= 17.Rc1 Nd3?? (better 17...Qd7=) 18.Bd3+– (worse 18.Qd3 Qd3 19.Bd3 Rd8+–) 1–0. GuestFVNG – GuestGVQD, freechess.org, 2020.

9.a4 Nc4 10.Bc4 dc4 11.Na3=+.

9.d3 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Bd7 13.Bc3 Qa8 (13...Bd6 14.Qc2=) 14.Qb3 Qa4 15.Nbd2 Qb3 16.Nb3 Ra8 17.Na5 (17.Ra1 Ra4+=) 17...dc4= 18.dc4 (worse is 18.Nc4 Nbd5 19.Bf6 Bf6–/+) 18...Ne4 19.Be1 Bc8 (19...Nd6 20.Ne5=) 20.Ne5 (20.Bd3 f5=) 20...f6 (20...Nd6 21.f4=) 21.Nd3 e5 22.f3 Ng5 23.Nf2 (23.f4 ef4 24.ef4 Ne4=) 23...Bd8 (23...Be6 24.f4 Nf7 25.f5 Bf5 26.Nb7–/+) 24.Nb3 Ne6 (24...Ra2 25.Bd3=) 25.Ne4 (25.Ba5 Nd7 26.Bd8 Nd8+=) 25...Be7 (25...Ra3 26.Nbc5 Be7 27.Ne6 Be6 28.c5=) 26.Ba5 Nd7 27.Ra1 (27.Nc3 b6 28.Nd5 Bd8+=) 27...b6 (27...Kf7 28.g4=) 28.Bc3 Ra1 29.Ba1 Bb7 (29...f5 30.Nc3=) 30.Nc3 Kf7 31.Bd3 g6 32.Be4 (32.Nd5 Bd6=) 32...Be4 33.Ne4 f5 34.Nc3 Nc7 (34...h6 35.Nd5=) 35.Ne2 (35.Kf2 h6=) 35...Bf6 (35...Ne8 36.Nd2=) 36.Kf2 (36.Nc3 Ke6=) 36...Ke6 (36...Ne8 37.Nd2=) 37.f4 (37.e4 Ne8 38.Ke3 Bg5 39.Kd3 Nd6=) 37...Ne8+= 38.Bc3 Nd6 (38...Bg7 39.Nd2+=) 39.Nd2 Kf7 (39...Bg7 40.Ke1=) 40.g3 Ke8 41.Ke1 Kd8 42.Kd1 Kc8 43.Kc2 h5 44.Ng1 e4 45.Ne2 Kd8 46.Bf6 Nf6 47.h3 Ke7 48.Kc3 Kf7 49.Nf1 Kg7 50.Kb3 Kh6+= 51.h4 Kg7 52.Nc3 Kf7 53.Na4 Nc8 54.Nb2 Ke6 55.Kc3 Kd6 56.Kb3 Kc7 57.Nd1 Nd6 58.Kc3 Ng4 59.Kb3 Nh6 60.Kc3 Nhf7 61.Kb3 Nd8 62.Kc3 N8b7 63.Nb2 Na5 64.Nh2 (64.Nd2 Kd7=) ½–½. Husarik,Branko – Londyn,Radek, Czech–ch U16, 2000.

9.d3 Bd7 10.a4+= dc4 (10...Qc7 11.Nbd2+=) 11.dc4 a6 (11...Nc8 12.Qd3+/–) 12.a5 (12.Nbd2 Nc8+=) 12...Nc8 13.b6 Bc6 (13...Nd6 14.Nc3+=) 14.Ne5+/– Be4 (14...Qd1 15.Rd1 Be8 16.Bf3+–) 15.Nd2 (15.Qb3+/–) 15...Bg6 (15...Bf5!?+/–) 16.Bf3+– Rb8 17.Nb3 (17.e4 Nd7 18.Ng6 hg6+–) 17...Be4? (better is 17...Qd1 18.Bd1 Nd6+=) 18.Be4+– Ne4 19.Nd7 Ncd6 20.Nb8 Qb8 (20...Nc4 21.Qg4 Nb2 22.Qe4 Qb8 23.Ra2+–) 21.Be5 (21.Qe2 Qc8+–) 21...f6 (21...Qc8 22.Qe2+–) 22.Bd6 (22.Bb2 Qc8 23.f3 Ng5+–) 22...Bd6 23.f4 f5 (23...Rd8 24.Qc2 f5 25.Rad1+–) 24.Nd2 Nf6 25.h3 (25.Ra3 e5 26.e4 ef4 27.ef5 Qc8+–) 25...e5 26.g3 (26.Qf3 Rd8+/–) 26...Qc8 (26...Qe8 27.Nf3 Qe6 28.Kg2+/–) 27.Qf3 g6 (27...Rf7 28.Rad1 Qe8 29.fe5 Qe5 30.Qf4+–) 28.Kg2 Re8 (28...Qd7 29.Rad1+/–) 29.Ra3 (29.Rad1 Qd7+–) 29...Qd7 (29...Re7 30.Rd1+/–) 30.Rd1 Qe7 (better is 30...Qf7+/–) 31.Rf1 ef4?? (31...Qd7 32.Nb1 Qf7+/–) 32.ef4+– Kf7 33.Rd3 Ne4? 34.Re3 Qe6 35.Rfe1 Re7 36.Ne4 fe4 37.Qe4 Qe4 38.Re4 Re4 39.Re4 Be7 40.Re5 Bd6 41.Rd5 Ke6 42.Kf3 h6 43.Ke4 h5 44.g4 hg4 45.hg4 Be7 46.f5 gf5 47.gf5 Kf7 48.Rd7 Kf6 49.Rb7 Bd6 50.Ra7 (50.Ra7 Kg5 51.Ra6 Kh4 52.b7 Bc7 53.Ra8 Kh5 54.a6 Kg4 55.Rg8 Kh4 56.a7 Bd6 57.b8Q Kh3 58.Qd6 Kh4 59.Qh6#) 1–0. Ebert,Lutz – Thiele,Bernd, Wittenberge–Guestrow, 2000. (=1.Nf3 d5 2.b4 Nf6 3.Bb2 e6 4.b5 Be7 5.e3 c5 6.c4 0–0 7.Be2 Nbd7 8.0–0 Nb6)

9.d3 Nfd7 10.a4 a5 11.ba6 ba6? 12.a5 +–.

9.d3 Nfd7 10.a4 a5 11.ba6 Ra6 12.Qb3 Bf6=.

9.d3 Nfd7 10.a4 a5 11.Nbd2 dc4 12.dc4+= Bf6 13.Qc2 (13.Bf6 Nf6 14.Qc2 Qe7+=) 13...Bb2 14.Qb2 Qf6 (14...Qe7 15.Qc2+=) 15.Qc2 Ne5 (15...Rd8 16.Bd3 Qh6 17.Rad1+=) 16.Ne4 (16.Ne5 Qe5 17.Rfd1 f5+=) ½–½. Schwichtenberg,Juergen (1620) – Kellner,Guenther (1625), 58sen.LSEM, 2005.

9.d3 Nfd7 10.a4 a5 11.Nbd2 Bf6 12.Qc2=.

9.cd5 Nbd5 10.d4 cd4 11.Bd4 Bd7 12.a4 Qa5 13.Ne5 a6 14.Nd7 Nd7 15.Bd3 (15.Nc3 N5f6 16.f4 Rfd8=) 15...Bf6= 16.Bf6 N7f6 (worse 16...gf6 17.Qg4 Kh8 18.Qh4+=) 17.Nd2 Qc7 18.Qc2 (18.Rc1 Qe7=) 18...Qc2 19.Bc2 ab5 20.ab5 Nc3 21.Bd3?? (21.b6=+) 21...Nfd5?? (better 21...Rad8 22.Nb1 Rd3 23.Nc3 Rc3–+) 22.Rac1 Rfc8 23.Nb1 Nb1 24.Rb1 h6 25.Be4 Rd8 26.Bd5 Rd5 27.Rb2 b6 28.Rfb1 ½–½. valpa – cantilever, playchess.de, 2003.

9.Ne5 Bd6 10.f4 Bd7 (10...dc4 11.Nc4 Be7 12.Nb6 Qb6 13.a4=) 11.a4 (11.d3 Qe7+=) 11...a6 (11...Nc4 12.Nc4 dc4 13.Na3=) 12.a5 (12.d3 ab5 13.ab5 Ra1 14.Ba1 Qc7+=) 12...Nc4= 13.Nc4 dc4 14.b6 Bb5 (14...Bc6 15.Bc4 Qe7 16.Nc3=) 15.Na3 Be7 (15...c3 16.Bc3 Bc6 17.Nc4+=) 16.Bc4 (16.Nc4 Qd7+=) 16...Bc4 (16...Qd7 17.d3=) 17.Nc4 Qd5 (17...Qd3 18.Ne5 Qb5 19.Bc3=) 18.Qe2 (18.d3 Rad8 19.Ne5 Ne8+=) 18...Rfd8 Exerts pressure on the backward pawn (18...Rad8 19.Rfd1=) 19.Rfd1 Qd3 20.Qd3 Rd3 21.Ra3 Rad8 (21...Rd5 22.d3+=) 22.Rd3 Rd3 23.Kf1 (23.Kf2 h5+=) 23...Ng4 (23...Nd5 24.Ke2 Nb4 25.e4+=) 24.Ke2 Rd8 25.h3 Nf6 26.d4 (26.g4 Nd5+=) 26...cd4 (26...Ne4 27.Rc1+=) 27.Bd4 (better is 27.Rd4 Rd4 28.Bd4+=) 27...Rd4?? (better is 27...Ne4+=) 28.Rd4+– Nd5 (28...Kf8 29.Nd6 Bd6 30.Rd6+–) 29.Kf3 (better is 29.e4 Bc5 30.Rd2 Nf4 31.Kf3 g5+–) 29...Bf6 (29...f5 30.g4 g6 31.e4 fe4 32.Re4+–) 30.Rd2 (30.Rd1 h5+–) 30...Be7 (30...Bc3 31.Rc2 Bb4+–) 31.e4 Bb4 (31...Nf6 32.Nd6 Bd6 33.Rd6+–) 32.Rd4 Bc5 33.Rd3 Bb4 (33...Nb4 34.Rd8 Bf8+–) 34.ed5 ed5 35.Na3 (35.Na3 h5 36.Nb5 Ba5 37.Nd6 Bb6 38.Rd5+–; better is 35.Rd5 g5+–) 1–0. Buczinski,Henryk – Pawlowski,Wojciech, Siemianowice Slaskie Poland, 1965.

9.Ne5 Nfd7 10.cd5 ed5 11.Qc2=.

9.d3 dc4

10.dc4 a6 11.ba6 Ra6 12.Be5=.

10.dc4 a6 11.Qc2+=.

10.dc4 Ne4 11.Qc2 f5 12.Rd1 Nd7 +/–.

10.dc4 Ne4 11.Qc2 f5 12.Nbd2 Nd2+= 13.Qd2 Bf6 14.Bf6 Qf6 15.Qd6 Bd7 (15...Nd7!?+=) 16.Rad1 Rac8 17.Qf4 Be8 18.Ne5 g5 19.Qg3 Bg6 20.f4 g4 21.a4 Rfd8 22.a5 Na4 (22...Na8 23.Bd3+/–) 23.e4 (better is 23.Qe1 g3 24.hg3+–) 23...fe4? (better is 23...Nb2 24.Rb1 Rd2+/–) 24.Qa3+– (24.Qg4?! Nc3 25.Rd8 Rd8+/–; 24.Bg4?! Nb2 25.Rde1 Rc7+–; 24.Ng4?! Qg7+/–; 24.Ng6?! hg6 25.Qe3 g3 26.Qg3 Nb2 27.Rd8 Rd8=) 24...e3 25.Qa4 (25.Ng6 Nc3 26.Ne7 Kg7+–) 25...Rd2 26.Rd2 ed2 27.Bg4 Rd8 28.Qb3 Be4 29.Qe3 Bc2 30.Bd1 Qf5 31.Qg3 Kf8 32.Qh4 Rd4 33.Bc2 Qc2 34.Qf6 Ke8 35.Qf7 Kd8 36.Qf8 Kc7 37.Qe7 (37...Kb8 38.b6 ab6 39.ab6 d1Q 40.Qc7 Ka8 41.Qc8#) 1–0. pierre – yammilko, Yahoo, 2005.

10.dc4 Ne4 11.Qc2 Bf6 12.Qe4 Bb2 13.Nbd2 f5 –/+.

10.dc4 Ne4 11.Qc2 Bf6 12.Ne5 (worse is 12.Qe4 Bb2 13.Nbd2 f5–/+) 12...Nd6 13.Nd2 Nd7 14.Ndf3 Ne5 15.Ne5 Qc7 16.f4 b6 17.Bd3 h6 18.Rf3 Be5 19.Be5 f6 (19...Bb7 20.e4+=) 20.Bb2 (20.Bh7 Kh8 21.Be4 Rb8 22.Bd6 Qd6+/–) 20...f5 (20...Bb7!? 21.e4 a6+=) 21.Rg3+/– Rf7 22.Rd1 Bb7 23.Be5 Rd8 24.Qe2 Qe7 25.Qh5 Ne4 26.Rg6 Kf8 27.Be4 Be4 28.Rd8 (28.Re6 Rd1 29.Qd1 Qe6 30.Qd8 Qe8 31.Bd6 Re7 32.Be7 Kf7 33.Qe8 Ke8+=) 28...Qd8= 29.Re6?? (better is 29.h3 Qd2 30.Qh4=) 29...Rd7 (better is 29...Qd2 30.Bd6 Kg8–+) 30.Qg6?? (better is 30.h3 Rf7 31.Rd6+–) 30...Rd1 0–1. Kleinke,Uwe – Illgen,Alexander (2020), Mecklenburg VP LL2, 2007.

10.dc4 Qd1

11.Rd1+= a6 12.ba6 Ra6 13.Nc3=.

11.Rd1+= a6 12.ba6 Ra6 13.Be5+=.

11.Rd1+= Bd7 12.a4 Rad8 13.a5 Nc8 14.a6 b6 15.Ne5 Be8 (15...Bd6 16.Bf3+–) 16.Rd8 Bd8 17.Nd2 Nd7 18.Nd7 (18.Rd1 Bc7 19.Nc6 Nb8 20.Nb8 Bb8+–) 18...Bd7 19.Ne4 Bc7 (19...f5 20.Rd1 Bb5 21.cb5 fe4 22.Rd7=) 20.Rd1 Rd8? (20...Be8+–) 21.f3?? (better 21.Nf6 gf6 22.Bf6+–) 21...Be8 22.Rd8 Bd8 23.Be5 f6 (better 23...Be7!?+–) 24.Nd6+– Nd6 25.Bd6 Kf7 26.Bb8 Ke7 27.Ba7 Bc7 28.f4 (28.Bd3 f5+–) 28...Bg6 29.Kf2 Bc2 30.Kf3 f5 31.h3 Kf6 (31...h6 32.Kf2+–) 32.Kf2 h6 33.g3 e5 34.fe5 Ke5 35.Bf3 g6 36.Ke1 Bd3 37.Bd5 g5 38.Kd2 Bf1 (38...Be4 39.Be4 Ke4 40.g4+–) 39.h4 gh4 (39...Bh3 40.Kd3+–) 40.gh4+– Kf6 41.Ke1 (41.Kc3 Ke5+–) 41...Bd3+– 42.Kd1 Be4 43.Bc6 (43.Be4 fe4 44.Kd2 h5=) 43...Ke5 (better 43...Bd3!?+=) 44.Bb7+– f4 45.Ke2 Bg6 (45...f3 46.Kf2+–) 46.Bd5 Be4 47.Bb7?? (47.ef4 Kf4 48.Be6 Ke5+–) 47...Bf5?? (47...Bg6 48.Bf3+–) 48.Bd5?? (48.Bf3 fe3 49.Ke3 Be6+–) 48...Bg4?? (better 48...Be4=) 49.Kf2+– h5 50.Bg8 Bd1 51.Bh7 (51.Bf7 fe3 52.Ke3 Bg4+–) 51...Bg4 52.Bg6 Kf6 ½–½. Woelfelschneider,Peter – Schmidt Seifert,Bernhard, CiF, 1991.

11.Rd1 Bd7 12.Nc3 Rad8 13.a4 Bc8 14.a5 Rd1 15.Rd1 Nbd7 16.Ne1 b6 17.ab6 ab6 18.Bd3 Ne5 19.Ne4 (19.Na4 Ned7+–) 19...Nd3+= 20.Rd3?? (better 20.Nf6 gf6 21.Nd3=) 20...Ne4–+ 21.Nf3 (21.Be5 Bh4 22.g3 Bf6–+) 21...Bf6 (better 21...f6 22.Ra3–+) 22.Bf6 Nf6 23.Rd1 (23.Ne5 Ne8–+) 23...Bb7 (23...Nd7 24.Kf1–+) 24.Ne1 (24.Ne5 Be4–+) 24...Be4 (24...Ng4 25.Rd7 Be4 26.Rd6–+) 25.Rd2 (25.f3 Bg6–+) 25...Ra8 26.f3 Bg6 27.Rd1 h6 28.Rd2 Kf8 29.Rd1 (29.Rd6 Rb8–+) 29...Ke7 30.Rc1 Ra3 31.e4 Nd7 32.Rc2 (32.h3 Ne5 33.f4 Nd7–+) 32...Ne5 33.Rc1 Ra4 34.Nd3 (34.Kf1–+) 34...Nd3 35.Rc2 (35.Rd1 Nb2 36.Rb1 Nc4 37.h4–+) 35…Ra1 (35...Ra1 36.Rc1 Rc1) 0–1. valpa – cantilever, playchess.de, 2003.

11.Bd1 Nc4 12.Bc3 Bd7 –/+.

11.Rd1 Na4

12.Bc1 Nd7 13.a3 a6 (13...Bf6 14.Ra2=) 14.Ra2 ½–½. Franke,Roland – Pustelnik,Jens, Bahn–chV Bad Laasphe, 1994.

12.Bc1 Ne4 13.Ne5=.

12.Be5 Nd7 13.Nc3 Ne5 14.Na4 Ng6 15.Rab1 b6 16.Nb2 (16.Nc3 a6=) 16...e5 17.Nd2 f5 18.a4 e4 19.f4 ef3 (19...Be6 20.a5=+) 20.Bf3 Rb8 21.Bd5 Kh8 22.a5 Bg5 23.Kf2 Ne5 24.h3 f4 25.e4 f3 (25...ba5 26.Na4 Bh4 27.Ke2=) 26.ab6 (better 26.Nf3!? Bh3 27.Nd3 (worse 27.gh3 Rf3 28.Kg2 Bh4–/+) 27...Nd3 28.Rd3+–) 26...fg2= 27.Kg2 Rb6 28.Rf1 Bf4 29.Bc6 (29.Nf3 Rg6 30.Kh1 Bh3 31.Ne5 Bg2 32.Kg1–+) 29...Nc6–/+ 30.Nd3 Bd6 (30...g5!? 31.Nf4 gf4 32.bc6 Rc6–/+) 31.bc6=+ Rc6 32.Rf8 Bf8 33.Ne5 Rc7 34.Rb8 g6 35.Ndf3 Kg7 36.Kf2? (36.Ng5 Be7 37.Ngf3 Bb7–+) 36...Bd6 (36...Bh3 37.Ng5 Bd6 38.Nef3–+) 37.Ke3? (better 37.h4–/+) 37...Bh3–+ 38.Ng5 (38.Rd8 Be7 39.Rd1 g5–+) 38...Bc8 39.Nd3 h6 40.Nf3 White plans e5 40...Bg4 (40...Be6 41.Nd2–+) 41.e5 Re7 42.Ra8 Bf3 43.Kf3 Be5 44.Nc5 Bd4 45.Ne4 h5 46.Rc8 White intends c5 46...Bb6 (46...Rf7 47.Ke2–+) 47.c5 Rc7 48.Rb8 (48.Rc7 Bc7 49.Nc3 Be5–+) 48...Bc5 (48...Rc5!? 49.Nc5 Bc5 50.Rc8–+) 49.Nc5 Rc5 50.Rb7 Kh6 51.Ra7 Kg5 52.Ra3 Kf5 53.Kg3 g5 54.Rf3 Kg6 55.Rf8 Rc3 56.Kg2 g4 57.Rg8 Kf5 58.Rh8 Kg5 59.Rg8 Kh4 60.Rh8 Rc2 (60...Rc2 61.Kf1 g3–+) 0–1. Laurent,Rudolf (1785) – Luther,Helmut (1990), RLNO_BavRgb1–SWNbg1_R7_BY00/01, 2001.

12.Be5 Ne4 13.Bd3 Rd8 14.Bc2 Rd1 15.Bd1 Nb6 16.Nbd2 Nd2 17.Nd2 f6 18.Bc7 Bd7 (18...f5!?+=) 19.Bf3+/– Bd8 (19...Rc8 20.Bb6 ab6 21.Bb7+/–) 20.Bd6 Bc8 21.Bc5 Nd7 22.Bd6 a6 23.Nb3 White plans c5 23...Nb6 24.c5 Nc4 25.a4 Nd6 26.cd6 ab5 27.ab5 Ra1 28.Na1 Bd7 29.Bb7 Bb5 30.Nb3 Bb6 31.Nd4 Bd4 32.ed4 Kf7 33.Bc8 Bc4 34.Bd7 g5 35.f3 f5 36.g3 f4 37.gf4 gf4 38.Bc6 Bd5?? (better is 38...Bd3+–) 39.Bd5 ed5 40.Kg2 Ke6 41.Kh3 h5 (41...Kd6 42.Kg4 Ke6+–) 42.Kh4 Kd6 43.Kh5 Kc6 44.Kg5 (44.Kg5 Kd7 45.Kf4+–) 1–0. Osmak,Yulia – Brozhik,Vasilij (2095), Kiev Independence Cup–B 9th, 2009.

12.Be5 Ng4+=.

9.d3 Qc7

10.a4 Bd7 11.a5 Nc8 12.Qb3 Nd6 13.Nbd2 b6 14.Ne5 Be8? (better 14...Rfd8+–) 15.ab6+– Qb6 16.Ra6 Qb7 17.Bf3 Qc7? (17...Nf5+–) 18.b6 Qb7 19.Rfa1 Nc8 20.ba7 Qb3 (20...Qc7 21.Qa2+–) 21.Nb3 Nd7 (21...Bd8 22.Nc5 Bb6 23.Rb6 Nb6+–) 22.cd5 Ne5 (22...ed5 23.Bd5 Ra7 24.Ra7 Na7 25.Ra7+–) 23.Be5 f6 (23...Bb5 24.d6 Bd6 25.Bd6 Ra7 26.Ra7 Nd6 27.Nc5+–) 24.d6 fe5 (24...Ra7 25.Ra7 Bd6 26.Bd6 Nd6 27.Nc5+–) 25.Ba8 Bd6 1–0. DEFFM – GuestHPDV, freechess.org, 2019.

10.Qc2 a6 11.cd5 Nbd5 12.Be5=.

10.Nbd2 Bd7 11.a4+= Nc8 12.g3 Nd6 13.e4 ½–½. Schwichtenberg,Juergen (2000) – Bungter,Hans, EU–ch Seniors, 2005.

10.Nbd2 Rd8 11.Qc2 Bd6 12.cd5 Nbd5 13.Nc4=.

10.Nbd2 Rd8 11.Qc2 Nbd7 (11...Bd6 12.cd5 Nbd5 13.Nc4=) 12.Rfc1 (12.cd5 Nd5 13.Nc4 a6=) 12...b6 (12...e5 13.cd5 Nd5 14.Ne4=) 13.d4 (13.cd5 ed5 14.d4 c4=) 13...Bb7 (13...cd4 14.Nd4 Bd6 15.Nc6+=) 14.cd5 ed5 15.dc5 Nc5 (15...bc5 16.Bd4+=) 16.Nd4 Rac8 17.N2f3 (17.Qf5 Nfe4 18.N2f3 Qd6+–) 17...Nfe4 18.Qd1 Bf6 19.a4 Qd7 (19...Re8 20.Bd3+=) 20.h3 (20.a5 Re8+=) 20...Ne6 (20...a5 21.ba6 Ba6 22.Ba6 Na6 23.a5 Rc1 24.Qc1 (worse 24.Rc1 ba5 25.Bc3 Nb4–/+) 24...ba5 25.Ra5=) 21.Nh2 (21.a5 Rc1 22.Qc1 ba5 23.Ra5 Rc8+–) 21...Nd4= 22.Bd4 Qf5 (22...Bd4 23.Qd4 Qe6 24.Nf3=) 23.Nf3 (23.Ng4 Bd4 24.Qd4 Qe6+=) 23...Bh4 24.g3 Bf6 25.g4 (25.Bf6 Nf6 26.Kg2 Ne4=) 25...Qe6 26.Bf6 (26.Bd3 Nc5=) 26...Qf6 27.Qd4 Qe6 28.Nh4 (28.Bd3 Re8=) 28...f6 (28...Rc1 29.Rc1 Ng5 30.Kg2=) 29.Ng2 (29.Nf5 g6 30.Ng3 Ng3 31.fg3 Re8 32.Rc8 Bc8=) 29...Qe5 (29...Rc1 30.Rc1 Rc8 31.Rc8 Bc8 32.Nf4+–) 30.f4 (30.Bd3 Ng5 31.Qe5 Nf3 32.Kf1 fe5=) 30...Qd6 (30...Qe6 31.Bd3=+) 31.Bd3 Nc5 (31...Qe6 32.Rd1=+) 32.Rab1 (32.Bf5 Nb3 33.Bc8 Nd4 34.Bb7 Ne2 35.Kf1 Nc1 36.Rc1 Qb4–+) 32...Re8 (32...Nb3 33.Rc8 Nd4 34.Rd8 Qd8 35.ed4–/+) 33.Rd1 (33.Bf5 Rc7 34.Rc3 Ne6=+) 33...Ne6=+ 34.Qb2 (34.Qb4 Nc5=+) 34...d4 35.Bf5 Bg2 36.Qg2 Qa3 (36...Qc7 37.Qd5 (37.ed4?! Nf4 38.Qa2 Qc4=) 37...Qf7 38.ed4+–) 37.Rd3 (37.ed4 Nf4 38.Qf1 Qg3 39.Kh1 Re2 40.Qe2 Ne2 41.Be6 Kf8–+) 37...Qa4 (37...Rc3 38.Rc3 dc3 39.Qc6+=) 38.Qd5 Qc4 39.Be6 Re6 40.Qc4 Rc4 41.ed4 The passed pawn on d4 will quickly become a dangerous weapon (41.Rd4 Rd4 42.ed4 Re4+=) 41...Re4 (41...Rd6 42.Rbd1+=) 42.d5+= Rc7 (better 42...Rf4!? 43.d6 Rfd4+=) 43.d6+– Rd7 44.f5 (44.Rc1 Re6 45.Rc6 g5+–) 44...Rc4 (44...Re2 45.Kf1 Re5 46.Kf2+–) 45.Kf2 Kf7 46.Re1 (46.Ke3!?+–) 46...Rc5= 47.Rde3 Re5 48.Re5 fe5 49.Rd1 Kf6 50.Ke3 g6 (50...Kg5 51.Ke4 Kf6 52.h4+–) 51.Ke4 gf5 52.gf5 h6 53.h4 (53.Rg1 Rd6 54.Rg6 Ke7 55.Ke5 Rg6 56.fg6 Kf8+–) 53...h5 54.Rd2 (54.Rg1 Rd6 55.Rg6 Ke7 56.Ke5 Rd1 57.Rg7 Ke8 58.Ra7 Re1 59.Kf6 Re4+–) 54...Rd8 55.d7 (55.d7 Kf7 56.Ke5+–) 1–0. Steinbacher,Claudia (2120) – Hauer,Dorit (2045), BL, 2001.

10.Qc2 Nbd7

11.a4 a5 12.Nc3 b6 13.Rfd1 (13.Rac1 Bd6+=) 13...Bb7 (13...Bd6 14.cd5 ed5 15.d4=) 14.h3 (14.cd5 ed5 15.d4 c4=) 14...Rfd8 (14...dc4 15.dc4 Rad8 16.Rab1=) 15.Qb3 (15.cd5 ed5 16.d4 c4=) 15...dc4 (15...d4 16.Ne4=+) 16.dc4= Ne4 (16...Bd6 17.Rab1=) 17.Qc2 (17.Ne4 Be4 18.Rd2 Bf6=) 17...Nc3 18.Bc3 Bf6 19.Rd2 Bc3 (19...Be4 20.Qb3= (worse 20.Qe4 Bc3 21.Rd7 Qd7–/+)) 20.Qc3 Nf6 (20...Rac8 21.Rad1+=) 21.Qb2 (21.Rad1 Qe7=) 21...Rd2 22.Qd2 (22.Nd2 Rd8=) 22...Rd8=+ 23.Qb2 h6 (23...Nd7 24.Re1=) 24.Rd1 Rd1 25.Bd1 Qd6 (25...Be4 26.Be2=) 26.Qd2 (26.Be2 Be4=) 26...Qd2 27.Nd2 Ne4 28.Ne4 Be4 29.h4 (29.f4 Kf8=) 29...Bd3 30.Bb3 f5 31.f4 (31.f3 e5=+) 31...Kf7 32.Kf2 Kf6 33.Kf3 (33.h5 e5=+) 33...e5 (33...h5 34.Kf2=+) 34.Kg3 (34.h5 e4 35.Kg3 g5 36.hg6 h5=+) 34...e4 (34...g6 35.Kh3=+) 35.Kf2 (35.h5 g5 36.hg6 Kg6=+) 35...Kg6 (35...g6 36.Ke1=+) 36.g3 Kh5 (36...Kf6!?=+) 37.Bd1= Kg6 38.Bb3 Kh5 (38...Kf6!?=+) 39.Bd1= Kg6 40.Bb3 Kf6 41.Kg2 Be2 42.Kf2 Bf3 43.Kg1 Kg6 44.Kh2 (44.Bc2 Kf7=+) 44...Be2 (44...Kh5 45.Kg1–/+) 45.Kg2–/+ Kh5 46.Kh3 Bg4 (46...Bf3 47.Kh2–/+) 47.Kg2=+ Bf3 48.Kh3 (48.Kf2 g5 49.hg5 hg5=+) 48...Be2 (48...g5 49.hg5 hg5 50.Kh2=+) 49.Kg2 Kg4 (49...g5 50.hg5 Bf3 51.Kf2 hg5 52.Ke1=+) 50.Kf2=+ Bf3 51.Bc2 g5 52.hg5 hg5 53.Bb3 gf4 (53...Kh5 54.Ke1–/+) 54.gf4 Kh3 55.Bc2 ½–½. Herm,Florian – Schnurr,Marco, Baden–ch AT1, 2003.

11.a4 a5 12.Nc3 Bd6 13.cd5 ed5 14.Rac1=.

11.a4 a5 12.Nbd2 Qd6=.

11.a4 dc4 12.dc4 e5 13.Nc3+=.

11.cd5 ed5 12.Rc1 Bd6=.

8.0–0 dc4

9.Na3 Qa5 10.Qc1 Ne4 11.Bc4 Nd6 12.Bd3 b6?? (better 12...a6 13.Bc3 Qa4=) 13.e4+– c4 (13...Bf6 14.e5+–) 14.Bc3 (14.Nc4?! Qb5 15.Nce5 Qa4+=) 14...Qa3 15.Qa3 cd3 16.Bd4 Bb7 17.e5 Nf5 18.Qd3 Rad8 (better 18...Rfd8 19.Qc3 Bf3 20.gf3 Rac8+–) 19.Qc4 Nd4 20.Nd4 Ne5 21.Qa4 Bf6 22.Nb3 Ra8 23.Rab1 Ng6 24.Rfc1 Nh4 (24...a6 25.Rc7 ab5 26.Qb5+–) 25.f3 Rfe8 (25...a6 26.Rc7 ab5 27.Qb5+–) 26.Rc7 Re7 27.Rbc1 Nf5 28.Re7 Be7 29.Rc7 Bd5 30.g4 Bd8 (30...Bb3 31.ab3 Bc5 32.Rc5 bc5 33.gf5 ef5+–) 31.Ra7 (31.gf5?! Bc7 32.fe6 fe6+–) 31...Ra7 32.Qa7 Kf8 33.Qd7 Bg5 34.gf5 Bb3 35.ab3 ef5 36.Qf5 Bd2 (36...h6 37.Qc8 Ke7 38.d4+–) 37.Qc8 Ke7 38.Qc7 Ke8 39.Qe5 Kd7 40.Qd5 Kc7 41.Qd2 g6 42.Qf4 Kd7 43.Qf7 Kd8 44.Qf6 Ke8 45.Qb6 Kd7 46.Qa7 Ke6 47.b6 h6 (47...g5 48.b7 Kf6 49.b8Q Ke6 50.Qg8 Kd6 51.Qb6 Ke5 52.Qg5) 48.b7 Kd5 (48...Kf5 49.Qc5 Ke6 50.b8Q h5 51.Qcd6 Kf5 52.Qb5) 49.b8Q Ke6 50.Qbb6 Kf5 (50...Ke5 51.Qe7 Kf4 52.Qbf6) 51.Qc5 Kf4 52.Qf7 1–0. GLChess213 – EnginMax181, computer chess game, 2001.

9.Na3 a6 10.ba6 ba6 11.Nc4+= Nb6 12.Rb1 Nc4 13.Bc4 Rb8 14.Qe2 Nd5 15.Ba6 Ba6 16.Qa6 Nb4 17.Qc4 Ra8 (17...Nd3 18.Bd4 Rb1 19.Rb1 cd4 20.Qd3 de3 21.Qe3+=) 18.d4 cd4 19.Nd4 Qc8 (worse is 19...Ra2 20.Nc6 Nc6 21.Qa2+– (21.Qc6?! Qd6 22.Qe4 Rd8=)) 20.Qb3 Qa6 (20...Ra2? 21.Ba3 Ra3 22.Qa3+–; 20...Na2?! 21.Rfd1=) 21.a3 Nd3 22.Nb5 Nb2 23.Rb2 Rfb8 (23...Ba3 24.Ra1 Bb2 25.Ra6 Ra6 26.Qb2+=) 24.Rfb1 h6 (24...Ba3? 25.Qa3 Qa3 26.Na3 Rb2 27.Rb2+–) 25.Qd3 Qa4 (25...Ba3? 26.Ra2 (26.Qa3?! Qa3 27.Na3 Rb2 28.Rb2 Ra3=) 26...Rb5 27.Rb5+–) 26.Nc3 Rb2 27.Na4 (27.Na4 Rb1 28.Qb1 Ra4 29.Qb8 Bf8 30.Kf1+/–; worse is 27.Rb2 Qa3 28.Ra2 Qc1 29.Qf1 Qf1 30.Kf1 Ra2 31.Na2 Bd6=) 1–0. Hort,Vlastimil – Smetana,Jaroslav, CSR–chT Harrachov, 1968. (=1.Nf3 Nf6 2.b4 e6 3.b5 c5 4.c4 d5 5.e3 Be7 6.Bb2 0–0 7.Be2 Nbd7 8.0–0 dc4)

9.Na3 a6 10.ba6 Ra6 11.Bc4 (11.Qc2 Nd5+=) 11...Ra8 12.Nb5 Nb6 13.Be2 Nbd5 (13...Na4 14.Be5=) 14.Qb3 (14.a4 Nb4+=) 14...Bd7= 15.Rfd1 Qa5 16.Ne5 Bb5 17.Bb5 Rfd8 18.Nc4 (18.f3 Qb4+=) 18...Qb4= 19.Qb4 Nb4 20.a4 Nd3 21.Bc3 Nd5 22.Ba5 Rf8 23.e4 N5b4 (23...Nf6 24.f3=) 24.Bc7 Rac8 25.Bg3 Rcd8 26.Na5 Rd4 27.Nb7 Re4 (27...f5 28.ef5 ef5 29.f3+=) 28.a5+– Bf6 (28...Nb2 29.Rdb1 N2d3 30.a6+–) 29.Ra3 Rd4 30.a6 Ra8 31.a7 Nb2 (31...e5!?+–) 32.Rb1+– Nc2 (32...Nc4 33.Bc4 Rc4 34.Nd6+–) 33.Ra2 (33.Rb2? Na3 34.Nc5 Nb5 35.Rb5 Ra7 36.Rb8 Rd8–+) 33...Rb4 (better 33...Rd2 34.Nc5 Nb4+–) 34.Bc6?? (34.Nd6 Nd3 35.Rf1 Rb2+–) 34...Nd4? (34...Nd3 35.Rb4 Ndb4 36.Nd8 Nc6 37.Nc6=) 35.Be4?? (35.Nd8 Ra7 36.Ra7 (36.Rbb2?? Ra2 37.h3 Rab2–+) 36...Bd8 37.Be8+–) 35...Ne2=+ 36.Kf1 Ng3 37.fg3 Re4 38.Rbb2?? (better 38.Nc5 Rb4 39.Ra4 Ra4 40.Na4 Ra7 41.Nb2=+) 38...Bb2–+ 39.Nc5 (39.Rb2 Rb4 40.Rb4 cb4–+) 39...Rc4 40.Rb2 (40.Ne6 Be5 41.Ng5 Bd4–+) 40...Rc5 41.d4 (41.Ke2 g6–+) 41…Rcc8 0–1. Karmanova,Marina (2030) – Baraeva,Marina (2185), Moscow Open Women, 2012. (=1.Nf3 d5 2.b4 e6 3.Bb2 Nf6 4.b5 c5 5.e3 Be7 6.c4 0–0 7.Be2 Nbd7 8.0–0 dc4)

9.Na3 a6 10.ba6 b6 11.Nc4 Ba6 12.a4 Qc7 (12...Nd5 13.d4=) 13.d4 (13.Qc2 Bb7=) 13...cd4 (13...Rfc8 14.Nfe5=+) 14.Qd4= Nc5 15.Qc3 Rfd8 16.Rfc1 (16.Rfb1 Rac8 17.Rc1 Rd5=) 16...Rac8 (16...Bb7 17.a5 ba5 18.Ra5 Ra5 19.Qa5 Qa5 20.Na5=) 17.Qc2 Nd5 ½–½. Bonetti,Shane – de Bouver,Guido, Orang–Utan Invitational, 2002.

9.Na3 a6 10.ba6 b6 11.Nc4 Qc7 12.d4 cd4 13.Qd4 Nc5 14.Qc3 Rd8 15.Rfc1 Nd5?? (better is 15...Ba6 16.Qc2 Nd5=) ½–½. Bonetti,Shane – de Bouver,Guido, Orang Utan Invitational, 2000.

9.a4 b6 10.Na3 Bb7 11.Nc4 Qc7 12.Nfe5 White plans a5 12...Ne5 (12...a6 13.Qc2=) 13.Be5 Qd7 14.a5 Nd5 15.e4 (15.a6 Bc8+=) 15...Nf6 (15...Nb4 16.f3=) 16.ab6 (16.f3+=) 16...a6? (better 16...Be4!? 17.Bf3 Bd5+=) 17.ba6+– Ba6 18.Qb3 (better 18.f3+–) 18...Ne4? (better 18...Qb7+–) 19.Ra6!+– Ra6 20.b7 Nd2 (20...Ra4 21.b8Q Rb8 22.Qb8 Qd8 23.Qd8 Bd8+–) 21.Nd2 Ra7 (21...Bd6 22.Bd6 (22.Ba6?! Be5 23.Nf3 Bd6+–) 22...Rd6 23.b8Q Rd2 24.Q8b5+–) 22.b8Q Rb8 23.Qb8 (23.Bb8?! Rb7 24.Qg3 Qd2+–) 23...Bf8 24.Nc4 Rb7 25.Qa8 Ra7 26.Qb8 (26.Qe4!? Qd5 27.Qe3 Ra2+–) 26...Rb7 27.Qa8 Ra7 28.Qe4 Ra4 (28...Qe7 29.Rb1 Rd7 30.Bd3+–) 29.Rd1 Qa7 30.Bd3 g6 31.Qf4 Be7 (31...Qe7 32.Bc2 Ra2 33.Nd6+–) 32.Bc3 Qd7 (32...f6 33.Bf6 Qb7 34.Be2+–) 33.Qe5 (better 33.Bc2 Qd1 34.Bd1 Rc4 35.Qc4 Kf8+–) 33...f6 34.Qb8 Kg7 (34...Qd8 35.Qb3 Ra7 36.Na5+–) 35.Nb6 Qd3 (35...Qc6 36.Na4 Qa4+–) 36.Rd3 Ra1 37.Ba1 Kh6 (37...Bd6 38.Qd6 e5 39.Nd7 Kh6 40.Rh3 Kg5 41.Qf6 Kg4 42.Ne5) 38.Rh3 Kg5 (38...Kg7 39.Qc7 Kf7 40.Rh7 Kg8 41.Re7 e5 42.Qd8) 39.Qg3 Kf5 40.Rh4 g5 (40...c4 41.Rf4) 41.Qd3 1–0. DEFFM – GuestFWCB, freechess.org, 2019.

9.Bc4 b6 10.d3 Bb7 11.Nbd2 Qc7 12.Rc1 a6 A) 13.a4 Rfd8 (13...ab5 14.Bb5 Bd6 15.Qc2 Rfd8 16.Rfd1 Bc6 17.d4 Bb5 18.ab5 Ra2 19.Ra1=) 14.ba6 Ba6 15.Qc2 Nd5 16.Bd5 ed5 17.Rfe1 Qd6 18.Rb1 Re8 19.Rec1=+; B) 13.ba6 Ba6 (13...Bc8 14.a7 Qa7 15.Qb3 Rd8 16.Be6 fe6 17.Qe6 Kf8 18.Ng5 Ne5 19.Qe5+–) 14.a4 Bc4 15.Rc4 Rfd8 16.Qc2 Bd6 17.d4 Nd5 18.e4 Nb4 19.Qb3=.

9.Bc4 b6 10.d3 Bb7 11.Nbd2 Qc7 12.Rc1 Rac8 13.e4 (13.Qc2 Bd6 (13...Ra8 14.Rfd1 a6 15.a4 Rfd8 16.d4 ab5 17.Bb5 Bc6 18.Bc3 Bb5 19.ab5=) 14.Qc3 Ra8 15.e4 Bf4 16.Rfd1 a6 17.ba6 Ba6 18.d4 b5 19.Bf1=+; 13.Qb3 Rfd8 (13...Ra8 14.d4 a6 15.ba6 Ba6 16.a4 Bb7 17.Rfd1 Bd6 18.Bb5 Rfc8 19.Qc2=) 14.Rfd1 Bd6 15.Ne4 Ne4 16.de4 Be4 17.Be6 Bf3 18.Bf7 Kh8 19.gf3=) 13...Rfd8 (13...Ra8 14.Re1 Qf4 15.Qa4 Rfd8 16.a3 Ng4 17.Re2 Nge5 18.Qb3 Nc4 19.dc4=+; 13...Qf4 14.Re1 Ra8 15.Qa4 Rfd8 16.Bc3 a6 17.ba6 Qg4 18.Bb5 Ba6 19.Ba6=) 14.Qa4 (14.Qe2 Qf4 15.Qe3 Qe3 16.fe3 Ra8 17.Ng5 h6 18.Ngf3 a6 19.a4=) 14...Ba8 (14...Ra8 15.a3 Qf4 16.Rfe1 Ng4 17.Re2 Nge5 18.Qb3 Nc4 19.dc4=+) 15.h3 (15.Rfe1 Ng4 16.h3 Bf6 17.d4 Nh6 18.Bd3 Nf8 19.Red1+=) 15...Bd6 16.Rfe1 (16.Rce1 Bf4 17.a3 e5 18.Qb3 Rf8 19.Bc3=) 16...Ne5 (16...Bf4!?= 17.Bc3 Bb7 18.g3 Bh6 19.Re2=; 16...Nh5 17.Qb3 Nf4 18.Qc3 e5 19.Ng5+=) 17.Ne5 (17.Be5 Be5 18.Ne5 Qe5 19.Qa7+=) 17...Be5 18.Be5 Qe5 19.Qa7 Qd4? (better 19...Qf4 20.Nf3 Nd7+=) 20.Qb6+– Nd7 21.Qa6 Ne5 22.Nb3 Qb2 (22...Qd7 23.a4+–) 23.b6 1–0. tino_vegh (2025) – tactix47 (1780), gameknot.com, 2014.

9.Bc4 b6 10.d3 Bb7 11.Nbd2 Qc7 12.Rc1 Rfc8 A) 13.Qc2 Bd6 (13...a6 14.ba6 Ba6 15.a4 Bc4 16.Nc4 Rd8 17.Nfe5 Nd5 18.Rfd1 f6 19.Nf3=) 14.Rfd1 a6 15.ba6 Ba6 16.a4 Bb7 17.Ne4 Bc6 18.Bb5 Ne4 19.de4=; B) 13.Qb3 a6 (13...Bd6 14.Rfd1 a6 15.ba6 Ba6 16.a4 Bb7 17.Ne4 Bc6 18.Be6 Ba4 19.Bf7+=.) 14.ba6 Bd5 15.Bd5 Nd5 16.Qb5 Qd8 17.Be5 Nb4 18.Nc4 Na6 19.a4=.

9.Bc4 b6 10.d3 Bb7 11.Nbd2 Qc7 12.Rc1 Bd5 A) 13.Qc2 a6 (13...Bc4 14.Qc4 a6 15.ba6 b5 16.Qb3 Qa5 17.Rc2 Qa6 18.Rb1 Rfb8 19.Bf6=) 14.ba6 Bc4 15.Qc4 b5 16.Qb3 Qa5 17.Rc2 Qa6 18.Rb1 Rfb8 19.Ne5=; B) 13.Qa4 Bd6 (13...Rfd8 14.Rfd1 a6 15.ba6 Bc4 16.Nc4 Qa7 17.d4 Rdc8 18.a3 Qa6 19.Qa6=) 14.a3 Rfd8 15.Rfd1 Bb7 16.d4 cd4 17.Bd4 Nc5 18.Qc2 Nce4 19.Qb2=.

9.Bc4 b6 10.d3 Bb7 11.Nbd2 Qc7 12.Rc1 Bd6 A) 13.Qa4 Rfd8 (13...Ng4 14.h3 Nge5 15.Ne5 Be5 16.Be5 Qe5 17.a3 Rfd8 18.Rfd1 Nf6 19.Nf1=) 14.Rfd1 Ng4 15.h3 Bh2 16.Kf1 Nge5 17.Ne5 Be5 18.d4 cd4 19.ed4=+; B) 13.Qb3 a6 (13...Rfd8 14.Rfd1 a6 15.ba6 Ba6 16.Ba6 Ra6 17.d4 Be7 18.a3 Qc6 19.Nc4=) 14.ba6 Ba6 15.Rb1 b5 16.Bb5 Bb5 17.Qb5 Rfb8 18.Qc4 Rb4 19.Qc3=.

9.Bc4 b6 10.d3 Bb7 11.Nbd2 Qc7 12.Rc1 Rfd8 A) 13.Qa4 a6 (13...Bd6 14.Rfd1 Ng4 15.h3 Bh2 16.Kf1 Nge5 17.Ne5 Be5 18.d4 cd4 19.ed4=+) 14.ba6 Ba6 15.Ba6 Qa7 16.Rc4 Qa6 17.Qa6 Ra6 18.a3 b5 19.Rc3=+.; B) 13.Qb3 Bd6 (13...Qd6 14.Rfd1 a6 15.Ne4 Ne4 16.de4 Qc7 17.ba6 Ba6 18.Be6 fe6 19.Qe6+– 3.44) 14.d4 a6 15.ba6 Ba6 16.Ba6 Ra6 17.Rfd1 Be7 18.a3 Qc6 19.Nc4=.

9.Bc4 Nb6 10.Be2 a6=.

9.Bc4 Nb6 10.Be2 c4 11.a4+= Nbd5 (11...Qc7 12.Na3 Bd7 13.Rc1+–) 12.Bc4+– Nb4 (12...b6 13.Nc3+–) 13.Nc3 (13.Bd4 Qc7 14.Na3 Bd6+–) 13...b6 14.Ne5 Bb7 15.d3 Rc8 16.Rc1 (16.Qb3 Bd6 17.Ne2 Bd5 18.Bd5 Nfd5+–) 16...Bd6+= 17.Ne4 Be5 (17...Ne4 18.de4 Be5 19.Be5 Qd1 20.Rfd1 (20.Rcd1? Rc4 21.f3 Bc8–+) 20...Be4 21.Bb2+=) 18.Be5 Ne4 19.de4 Qd1 20.Rfd1 (20.Rcd1 Rc4 21.f3 g6–+) 20...Be4 21.f3 (better 21.Bb2 Bc2 22.Rd4+=) 21...Bb7?? (better 21...Nd3! 22.Bd3 Rc1 23.Rc1 Bd3+=) 22.Bd6+– Rc4 (22...Nd5 23.Bd5 Bd5 24.Bf8 Rf8+–) 23.Rc4 (23.Rc4 Nd5 24.Bf8 Kf8 25.e4+–) 1–0. solejuk – pietrek, internet, 2009.

9.Bc4 Nb6 10.Be2 Nbd5 11.Nc3 b6 12.Qb3 (12.Nd5 ed5 13.Ne5 a6=) 12...Bb7= 13.Rfd1 (13.Ne5 Nc3 14.Bc3 Nd5=) 13...Qc7 (13...Bd6 14.d4=) 14.Rac1 Rac8 (14...Rfd8 15.h3=) 15.d4 Nc3 16.Qc3 Nd5 (16...Ne4!? 17.Qc2 Bd5=) 17.Qb3+= Rfd8 18.dc5 (18.Qa4 Nf6+=) 18...Bc5 19.Bd4 Qe7 20.Bc5 bc5 21.Qa3 (21.h3 h6+=) 21...Ba8 22.g3 (22.Qa5 h6+=) 22...Nb4= 23.Nd2 Bd5 (23...Rd5 24.Nb1=) 24.Bc4 (24.Nc4 Be4+=) 24...Qb7 (24...Rc7 25.Qb3=) 25.Bd5 (better 25.Qb3!+=) 25...Rd5= 26.Nb3 (26.e4 Rd7 27.Nc4 Rd1 (worse 27...Qb5 28.Nd6 Qe2 29.Re1 Qe1 30.Re1 Rd6 31.Qa7+–) 28.Rd1 Qb5=) 26...Qb5=+ 27.Rd5 ed5 28.Qa7 Pawn c5, live or die! 28...Nd3 Black intends c4 29.Rc3 (29.Rb1 c4 30.a4 Qb8 31.Qb8 Rb8=+) 29...c4 30.Qd4 Qb7 (30...g6 31.e4 Qa6 32.Nc1 de4 33.Qe4–/+) 31.Nc1 (31.Nd2 h6 32.Kg2 Rb8–+) 31...Nb4 (better 31...Ne1!? 32.Kf1 Nf3–/+) 32.a3 Na6 33.e4 (33.Ne2=+) 33...de4 (better 33...Nc7!? 34.Rc2 Re8=+ (worse 34...de4 35.Qd7+–)) 34.Rc4= f5 (34...h6 35.Nb3 Rc4 36.Qc4+=) 35.Ne2 Nc7?? (35...Rf8 36.Rc1+=) 36.Nf4 (better 36.Qd7 Qb8 37.Nf4+–) 36...Ne8 37.Rc5 (37.a4 Nf6+–) 37...Rc5+= 38.Qc5 Qd7 39.Qc4 Kh8 (39...Kf8 40.Kg2+=) 40.Qe6 (40.Kg2!?+=) 40...Qd1= 41.Kg2 Qf3 ½–½. Goncalves,Samuel Jesus P – Passeiro,DMV (1890), Portugal Open (2), 2017.

9.Bc4 Nb6 10.Be2 Nbd5 11.Ne5 Nd7 12.Nc4 Bf6 13.d3 a6 14.Qb3 Rb8 (14...Bb2 15.Qb2 ab5 16.Qb5=+) 15.Bf6 Qf6 16.Nbd2 (16.Nba3 Rd8=) 16...Nc3=+ 17.Bf3 Nb5 18.Ne4 Qd8 19.a4 Nc7 20.Ned6 (20.Nb6 Ne5 21.Be2 Nd5 22.Nd5 Qd5 23.Qd5 ed5 24.Nc5 b6=) 20...Nd5 (20...b5 21.ab5 ab5–+ (21...Nb5?! 22.Nc8 Qc8 23.Qa4=)) 21.Rab1 Nb4 (21...b6 22.Rfd1=+) 22.Nc8 (22.d4 b6=) 22...Qc8=+ 23.d4 Nc6 24.Nd6 (24.dc5!? Nc5 25.Qc2=+) 24...Qc7–/+ 25.Nb7 cd4 (25...Na5 26.Na5 Rb3 27.Nb3=+) 26.Rfc1 Nde5 27.ed4 (27.Bc6!? Nc6 28.ed4=+) 27...Nf3–/+ 28.Qf3 Rb7 (better 28...Rfc8!? 29.Qb3 Qd7–/+) 29.Rb7= Qb7 30.Qc6 ½–½. Schirmer,Michael – Labsch, Dortmund GER, 1995.

9.Bc4 Nb6 10.Be2 Nfd5 11.a4 Bf6 12.d4 cd4 13.Nd4 e5= 14.Nb3 Be6 15.Nc5 (better 15.N1d2 Rc8 16.Ne4=+) 15...Bc8?? (better 15...Rc8 16.Ne6 fe6=) 16.a5+– Qc7 (16...Qe7 17.ab6 Ne3 18.fe3 Qc5 19.Qc1 Qb6 20.Ba3+–) 17.ab6 Qc5 18.Ba3 Nb4 (18...Qb6 19.Qd5 Rd8 20.Qe4+–) 19.Qa4 Be7 20.Rc1 Qd6 (20...Qb6 21.Bb4 Bb4 22.Qb4+–) 21.ba7 Be6 (21...Bf5 22.Nc3+–) 22.Bb4 (22.Bf3 Qb6 23.Bb4 Bb4 24.Qb4 Ra7 25.Ra7 Qa7+–) 22...Qb4 23.Qb4 Bb4 24.Bf3 Rfc8 25.Nc3 Bc3 (25...e4 26.Be4 Bc3 27.Bb7 Ra7 28.Ra7+–) 26.Bb7 Ba1 (26...Ra7 27.Ra7 Rd8+–) 27.Rc8 Rc8 28.Bc8 Bd5 29.b6 Bc3 30.b7 (30.b7 Bb7 31.Bb7+–) 1–0. GuestRXWT – fthompsonca, freechess.org, 2019.

9.Bc4 Nb6 10.Be2 Bd6 11.Ne5=.

9.Bc4 Qc7 10.Qc2 (10.Qe2 b6=) 10...b6 11.d4 (11.Nc3 Bb7=) 11...Bb7 12.Nbd2 Rac8 13.Bd3 (13.Rac1 cd4 14.Bd4 Ba3=) 13...cd4+= 14.Qc7 Rc7 15.Nd4 (15.Bd4 Rfc8+=) 15...Nc5 (15...Rfc8 16.Rfc1+=) 16.Rac1 (16.Rfc1 Rcc8 17.Bc2 Nd5+=) 16...Rfc8 17.Bb1 (17.Bc2 Bd5+=) 17...Na4 (17...Nd5 18.Ba3+=) 18.Rc7 Rc7 19.Rc1 Rc1 20.Bc1 Bc5 (20...Nc3 21.Bb2 Nb1 22.Nb1+=) 21.Ne2 Nd5 (21...Bb4 22.Bd3=) 22.Ne4 a6 (22...Be7 23.Bc2 Nb4 24.Ba4 Be4 25.Bb3+=) 23.Bd3= Nb4 (23...ab5 24.Bb5 Nc7 25.Nf6 gf6 26.Ba4=) 24.ba6 Na6 (24...Ba6 25.Ba6 Na6 26.Bd2=) 25.Bc2 (25.Nc5 N6c5 26.Bb5 Ba6 27.Ba6 Na6=) 25...Nb4 (25...Be7 26.f3 f5 27.N4g3+=) 26.Ba4 (26.Nc5 Nc5 (26...bc5? 27.Ba4 Na2 28.Bd2+–) 27.Bb1 Ba6=) 26...Be4 27.Nc3 Bd3 28.Bb3 Kf8 (28...Be7 29.f4+=) 29.Bb2 (29.Na4 Ke7=) 29...Ke7 (29...Bd6 30.a4=) 30.Na4 f6 31.Nc5 bc5 ½–½. Nemeth,Laszlo1 (2060) – Farkas,Adam, HUN–chT3, 2003.

8.0–0 Qc7

9.a4 a5 10.d3 b6 11.Nbd2 Bb7 12.Rc1 Rac8 13.Ba3 dc4 14.Nc4 Nd5 15.d4 Rfd8 16.dc5 Nc5 17.Nce5? (better is 17.Bc5 Qc5 18.Nfd2+=) 17...Ne3!–+ 18.Qe1 (18.fe3 Rd1 Discovered attack) 18...Nf1 19.Qf1 Bd6 20.Nd3 Bf3 21.Bf3 Bh2 22.Kh1 Bd6 (22...Nd3?! 23.Rc7 Bc7 24.g3–+) 23.Nc5 bc5 24.Bc6 Qe7 25.Qc4 Qf6 26.Kg1 Qf4 27.Qf4 Bf4 28.Re1 c4 29.g3 Bd2 30.Rd1 (30.Re4 c3–+) 30...c3 31.Kg2 c2 32.Rf1 Rd4 33.Bc1 Bc3 34.Be3 Rd1 35.Bc1 Rcd8 36.b6 (36.Ba3 Bb4 37.Be4 Ba3 38.Bc2 Rf1 39.Kf1 Rd2–+) 36...Rf1 (36...Rf1 37.Kf1 Rd1 38.Ke2 Rc1–+) 0–1. Hal1958 – Pbjarne, playchess.de, 2002.

9.Qb3 Bd6 10.d3=.

9.Qc2 b6 10.d4 Bd6 (10...cd4 11.Bd4 e5 12.Bc3=) 11.h3 Controls g4 (11.dc5 Bc5 12.cd5 Nd5=) 11...Bb7 12.Nbd2 Rfe8 13.Rac1 Rac8 14.Qb1 (14.cd5 Nd5 (worse 14...Bd5 15.e4+–) 15.dc5 Bc5=) 14...Qb8 (14...Ne4 15.cd5 Nd2 16.Nd2 Bd5 17.e4=) 15.Rfd1 Red8 (15...cd4 16.Bd4 dc4 17.Bb2=) 16.a4 (16.cd5 Nd5 (16...Bd5? 17.e4+–) 17.dc5 Bc5=) 16...Ne4 (16...cd4 17.Bd4 Ba3 18.Bf6 Nf6= (worse 18...Bc1 19.Bd8 Bd2 20.Be7+=)) 17.Ne4+– de4 Black has new doubled pawns: e4+e6 18.Nd2 f5 (18...cd4 19.Bd4 h6 20.Nf1=) 19.Nb3 Qc7 20.a5 Playing against the pawn chain 20...Bf8 (20...cd4 21.Bd4 Nc5 22.Nc5 Bc5 23.a6+–) 21.ab6 ab6 22.dc5 Nc5 23.Nc5 Bc5 The bishop likes it on c5 24.Rd8 Rd8 White has a new backward pawn: c4 25.Rd1 Ra8 26.Bd4 Bd4 27.ed4 (27.Rd4 Kf7+=) 27...f4 28.Qb3 Qd6 29.c5 White threatens to win material: c5xd6 29...Bd5 The bishop feels good on d5 (29...bc5 30.dc5 Passed pawn) 30.Qc3 Qc7 (30...Qd8 31.Bf1=) 31.Rc1 (31.Bc4 Re8+– (31...bc5? leads to nothing 32.Bd5 ed5 33.dc5+–)) 31...Rf8 32.Bc4 f3 33.g3 (33.Bd5 ed5 34.cb6 Qb6 35.Qc6 Qc6 36.Rc6 fg2 37.Rd6+=) 33...Rf5? (better 33...bc5 and Black has air to breath 34.dc5 Qc5 35.Bd5 Qd5=) 34.Bd5 ed5 (34...Rd5? 35.Qe3+–) 35.Ra1 h6 (35...Qc8 36.c6 Rf6+–) 36.Re1?? instead of simply winning the game (better 36.Ra8!? Kh7 37.c6+–) 36...Kh7?? an unfortunate move that relinquishes the win (36...Rh5 37.Qb3 Kh7–/+) 37.Rc1 (37.Qc1 bc5 38.Qc5 Qd7=) 37...Qd7 Black threatens to win material: Qd7xb5 (better 37...Rh5 38.cb6 Qb6=) 38.Ra1?? ruins a clearly superior position (38.cb6 Qb5 39.Qc6=) 38...Rg5 (38...Rh5 39.Qf3 ef3 40.Kf1 Qb5 41.Kg1 Rh3 42.cb6 Qd7 43.Rc1 Rh1 44.Kh1 Qh3 45.Kg1 Qg2) 39.Kh2?? another step towards the grave (better 39.Qc1 bc5 40.dc5–+ (40.Qc5?? Qh3 41.Qc6 Qg2)) 39...Qe7 (39...Rh5 40.h4 Rh4 41.Kg1 Qh3 42.Qf3 ef3 43.gh4 Qg2) 40.Rc1?? there were better ways to keep up the pressure (40.cb6!? Rg6 41.Qc7 Qd6+–) 40...Qd7 (better 40...Rh5!? and Black is still in the game 41.Qe1 bc5 42.Rc5 Qg5=) 41.c6+– (41.cb6 Worse is 41...Qb5 42.Qc5 Qe2=+) 41...Qc7 (41...Qc8 42.Qe1+–) 42.Qe3 Rf5 43.Qa3 (43.Ra1 Qd6 44.Qa3 Qc7+–) 43...h5 44.h4 (44.Kh1 Rf6+–) 44...g5 45.hg5 (45.Kh3 gh4 46.Kh4 Qg7=) 45...Rg5 (45...h4 46.Qa8 hg3 47.fg3 Rg5=) 46.Qe3 White threatens to win material: Qe3xg5 (better 46.Kh1!? and White can hope to survive 46...h4 47.g4+– (worse 47.gh4 Rh5 48.Kg1 Rh4 49.Qa7 Qa7 50.c7 e3 51.Rd1 Qc7 52.Rd2 ed2 53.Kf1 d1Q)) 46...Rg4=+ 47.Rg1?? (47.Rh1 h4 48.Kg1 Rg3 49.Kf1–/+) 47…Rh4 0–1. Melich,Jindrich (2130) – Brom,Jiri (2200), CZE–chT2J, 2003.

9.Qc2 b6 10.cd5 Nd5 (10...ed5 11.Nc3=) 11.d4 (11.Nc3 Nb4 12.Qb1 a6=) 11...Bb7 12.dc5 (12.Nc3 Nb4 13.Qb3 Rfc8=) 12...bc5 (12...Nc5 13.Nbd2+=) 13.a3 (13.Nc3 Nb4 14.Qb1 c4=) 13...Bf6 (13...a6 14.Nc3=) 14.Bf6 N7f6 15.Nbd2 Rfd8 (15...a6 16.ba6 Ba6 17.Ba6 Ra6 18.Nc4=) 16.Bd3 (16.Rfc1 Rac8+=) 16...h6 (16...a6 17.Rfb1=) 17.Ne4 The isolani on c5 becomes a target (17.Rfc1 Rac8=) 17...Rac8 (17...Ne4 18.Be4 c4 19.Rfc1+=) 18.Rac1 (18.Qc4 Kf8 19.Nf6 Nf6+=) 18...Ne4+= 19.Be4 Nf6 (19...a6 20.Bd5 ed5 21.a4+=) 20.Bb7= Qb7 21.a4 (21.Qa4 Ne4=) 21...a6 22.Rb1 (22.ba6 Qa6 23.Qc4 Qa5=) 22...ab5 (22...c4 23.Ne5=) 23.Rb5 Qe4 24.Qe4 Ne4 25.Ne5 ½–½. Lins,Thomas – Hesselbarth,Karlheinz (1980), Berlin Unicorn op, 2003.

9.Qc2 Bd6=.

9.Qc2 e5 10.d3 d4 (10...a6 A) 11.ba6 Ra6 (11...ba6 12.cd5 Nd5 13.Nbd2 Rb8 14.Rab1 Bb7 15.Nc4 f6 16.Nh4 f5; 11...d4 12.a7 b6 13.Na3 Qa7 14.Nb5 Qb8 15.h3 Bb7 16.e4 Ne8) 12.Nc3 d4 13.Nb5 Qa5 14.a4 h6 15.Bc1 Qb6 16.Bd2 Re8; B) 11.cd5 Nd5 12.Qb3 Qd6 13.Na3 Qe6 14.Nc4 ab5 15.Qb5 Bf6 16.g3 b6) 11.ed4 (11.a4 a5= (11...de3 12.fe3 Ng4 13.Qc1 e4 14.de4 f5 15.Nc3 fe4 16.Nd5 Qd6) 12.h3 Nb6 13.Nbd2 h6 14.Rfe1 Be6 15.e4 Nbd7 16.Nf1 Ne8; 11.h3 b6 (11...h6 12.Nbd2 Nb6 13.a4 Be6 14.a5 Nbd7 15.a6 b6 16.Nb3 Ne8; 11...Nb6 12.a4 Bf5 13.e4 Bg6 14.a5 Nbd7 15.a6 Nh5 16.g3 b6; 11...a6 12.ba6 ba6 13.Nbd2 Bb7 14.Rab1 Rab8 15.a3 Bc6 16.Nh4 g6) 12.Nbd2 Bb7 13.Nh4 g6 14.Nhf3 h6 15.Rfe1 a6 16.a4 Ra7) 11...ed4 (11...cd4 12.Nbd2+= Nc5 13.Nb3 Na4 14.Bc1 Nc3 15.Bb2 Ncd5 16.Ne5 Qe5) 12.Nbd2 Re8 13.Rfe1 b6 (13...Bd6 14.h3 Ne5 15.Ng5 Bf5 16.Nde4 Be7) 14.Ne4 (14.h3 Bb7+= 15.Ng5 h6 16.Nge4 a6) 14...Bb7 (14...Ne4 15.de4 a6 (15...Bb7 16.g3 a6) 16.Bd3+= (16.h3 Bb7) 16...Ne5) 15.Rad1 (15.Ng3 Bd6+= (15...g6 16.a4 a6) 16.Nf5 Ne5) 15...Bd6 (better is 15...Ne4 16.de4 a6–/+ –1.05 (16...Bd6–/+); 15...a6 16.Nf6 Bf6) 16.Bc1? (better is 16.Nd6 and White is still in the game 16...Qd6 17.Nh4=) 16...Ne4–+ (16...Be4?! 17.de4 Ne4 18.Bd3–/+) 17.de4 Be4 18.Qd2 (18.Qb3 Re7–+) 18...Rad8 (18...h6 19.h3–+) 19.Kf1 (19.h3 h6–+) 19...Bh2 20.Ng5 h6 (20...Bg6 21.Bd3–+) 21.Ne4 Re4 22.Bd3? (better is 22.Qd3 Rde8 23.Qh3–+) 22...Bf4 23.Qc2 (23.Be4 cannot undo what has already been done 23...Bd2 24.Rd2 Qh2–+) 23...Re1 24.Re1 Bc1 25.Qc1 Qh2 26.f3 Ne5 27.Qd2 (27.Qc2 is the last straw 27...g5 28.Re4–+) 27...Nf3! 28.gf3N Qd2–+ 0–1. Roelen,Jolanda – Cameron,Pernette, NED–ch U20 Girls, 1979.

9.Qc2 e5 10.cd5 Nd5 11.Nc3 Nb4 12.Qb1 Qd6 13.Rc1 g6 14.Ne4 Qc7 15.Bc4 a6 16.ba6 ba6.

9.Qc2 e5 10.cd5 Nd5 11.Nc3 Nc3 12.Bc3 h6= (12...g6 13.Qe4 Re8 14.Rac1 Bd8 15.Bb2 Nf6 16.Qc4 Bg4) 13.Rac1 Re8 14.h3 Bd6 15.Nh4 Nf6 16.Nf5 Nd5.

9.Qc2 e5 10.cd5 Nd5 11.Nc3 N5f6 12.Ne4 Ne4 13.Qe4 Bd6 14.Rac1 f5? (better 14...Nf6!? 15.Qh4 Qe7=) 15.Bc4+– Kh8 16.Qh4 Nf6 (16...Nb6!? 17.Bb3 a6+–) 17.d4+– cd4 18.ed4 e4 (18...ed4 19.Bd4 h6+–) 19.Ne5 Be5?? (19...g5 20.Qg5 Qg7+–) 20.de5 Ng4 (20...Qe7 21.ef6 gf6+–) 21.Bg8!! (21.Bg8 Rg8 22.Rc7+–) 1–0. GuestPQBY – olma, freechess.org, 2019.

9.Qc2 e5 10.cd5 Nd5 11.Nc3 N5f6 12.Ne4 Ne4 13.Qe4 Bd6 14.h3 Nf6 15.Qc2 Re8 16.Bc4 h6.

9.Nc3 Nb6 10.Qb3 (better 10.cd5 ed5 11.Qc2=) 10...e5 (better 10...dc4 11.Bc4 Nc4 12.Qc4 b6=+) 11.Nd5+– Nfd5 12.Be5 Bd6 13.Bd6 Qd6 14.cd5 Nd5 15.Bc4 (15.d4 Rd8+–) 15...Nb6 16.Rac1 Bg4 (16...a6 17.Be2 Be6 18.Qa3 ab5 19.Qc5 Qc5 20.Rc5 Ra2 21.Rb5+–) 17.Be2 (17.Ng5 Qg6 18.f3 Nc4 19.Rc4 Bf5 20.Rc5 b6+–) 17...Rac8 18.Qc2 (better 18.Qa3 Rfd8 19.Qa7+–) 18...Nd7?? (better 18...Rfe8+–) 19.Ng5+– Qh6 (19...f5 20.Bg4 Qg6+–) 20.Bg4 Nf6 (20...Qg5 21.Bd7 Rc7+–) 21.Bc8 Qg5 (21...Rc8 22.Qf5 Re8 23.Rc5+–) 22.Bb7 h5 (22...Nd7 23.Qa4 Qd8 24.Bc6+–) 23.Qc5 Qg4 24.Bf3 (better 24.Qa7!? Qb4 25.b6 Nd7+–) 24...Qd7 (24...Qa4 25.Qc4 Qa5 26.Rc2+–) 25.d4 Ng4 26.h3 Nf6 27.Bh5 Ne4 28.Qc6 Qe7 29.Rc2 Rd8 30.Bf3 (better 30.Qc7 Rd7 31.Qb8 Rd8+–) 30...Nf6 31.Qc7 Rd7 32.Qb8 Ne8 33.Rc8 Kf8 34.Bc6 Qe6 35.Bd7 Qd7 36.Rfc1 (36.Rfc1 Qe7 37.Rd8 g5 38.Rcc8 Qe4 39.Re8 Qe8 40.Re8 Kg7 41.Rg8 Kh6 42.Qf8 Kh5 43.Rg7 a6 44.Qh8) 1–0. Beljushina,Sonja – Jangurazova,Raisa, Championship Ufa, 2011.

9.Nc3 dc4 10.Bc4 Nb6 11.Be2 Rd8 12.Qc2 (12.a4 Bd6=) 12...Nbd5 (12...e5 13.Ne4 Ne4 14.Qe4=) 13.a3 (13.Nd5 ed5 14.Rac1 Qa5+=) 13...b6 (13...Bd7 14.Rac1=) 14.Ng5 (14.Nd5 Nd5 15.Be5 Bd6=) 14...g6 (14...h6 15.Nd5 ed5 16.Nf3=) 15.Nce4 (15.Rfc1 Bb7=) 15...Ne4 16.Ne4 e5 (16...a6 17.Nc3=) 17.Rac1 (17.Bc4 a6 18.Qb3 Bb7 19.ba6 Ba6 20.Bd5 c4 21.Bf7 Kf7+/–) 17...Bb7 (17...a6 18.d4 ed4 19.ed4 ab5 20.dc5=) 18.d4 (18.f4 ef4 19.Bc4 Kf8 20.Bd5 Bd5 21.Rf4 Be4 22.Qe4 Qd6+=) 18...ed4= 19.ed4 Rac8 (19...f5 20.Ng3=) 20.dc5+= Bc5 (20...bc5 21.Bc4+=) 21.Nc5 (21.Bc4 Be7+/–) 21...Qc5 (21...Qe7 22.Qa4 Rc5 23.Rc5 bc5 24.Re1+=) 22.Qa4 Qe7 23.Bf3 (23.Rc8 Bc8 24.Bf3 f6+/–) 23...Rc1 24.Rc1 Re8 (24...Nc3 25.Bc3 (25.Qa7 Ne2 26.Be2 Qe2–/+) 25...Bf3 26.Qf4+–) 25.Rf1 (25.h3 Qg5+–) 25...Ba8?? (better is 25...Qd7+/–) 26.Qd4 (26...Qf6 27.Qf6 (27.Bd5?! Qd4 28.Bf7 Kf7 29.Bd4 Be4+=) 27...Nf6 28.Ba8 (< 28.Bf6 Bf3 29.gf3 Re6+–) 28...Ra8 29.Bf6+–; 26.Bd5 Bd5 27.Qd4 f6 28.Qd5 Kg7+–) 1–0. Martine,Jean_Marie – Adam,Gerard, Limoges, 2000.

9.Nc3 Bd6 10.cd5 ed5 11.Rc1=.

9.d3 Bd6 10.Nbd2=.

9.d3 Rd8 10.Qc2 b6 11.a4 Bb7 12.Nbd2 Ne8 (12...a6 13.cd5 Nd5 14.Rfc1=) 13.a5 Bf6 14.a6 Bc8 15.Rac1 Ne5 (15...Nd6 16.d4 cd4 17.Nd4 dc4 18.Nc4 Bd4 19.Nd6 Qc2 20.Rc2 Bb2 21.Rb2+/– (21.Nc8?! Rac8 22.Rb2 Ne5=)) 16.d4 Nc4 17.Nc4 dc4 18.Qc4 Qd7 (18...Bd7 19.Ba3 Rab8 20.Rfd1+/–) 19.Rfd1 Nd6 20.Qa2 (20.Qc2 c4 21.Bc4 Nc4 22.Qc4 Qe8+=) 20...Nb5 (better is 20...c4!? 21.Bc4 Nc4 22.Qc4 Qe8+=) 21.dc5+– Qc6 (better is 21...Qe8 22.Bf6 Rd1 23.Rd1 gf6+–) 22.Rd8 Bd8 23.Ne5 Qe8 24.Bf3 Nc7 (24...Rb8 25.Bc6 Qf8 26.cb6 Bb6 27.Bb5 Be3+–) 25.cb6 (25.cb6 ab6 26.Ba8 Ba6 27.Rc7 Bc7 28.Qa6+–; 25.Ba8?! Na8 26.cb6 Nb6+–) 1–0. Melich,Jindrich (2190) – Rajnys,Vladimir, Ceske Budejovice op, 1995.

9.d3 Re8 10.Qc2=.

9.d4 cd4 10.Qd4 dc4 11.Qc4 Qc4 12.Bc4 Nb6=.

9.d4 Rd8=.

9.cd5 ed5 10.Nc3 Bd6=.

9.cd5 ed5 10.Nc3 Re8=.

9.cd5 ed5 10.d3 Bd6 11.Nbd2 Re8 12.Rc1 b6 13.e4 (13.d4 Ng4=) 13...de4 14.de4 Bb7 15.Bd3 Ne4 16.Ne4 Be4 17.Be4 Re4 18.Qd5 Rae8 19.Rcd1 (19.Rfd1 R8e6–/+) 19...R4e6 20.Ng5 (20.Qg5 Ne5 21.Rd6 Qd6 22.Be5 Re5 23.Ne5 Qe5 24.Qe5 Re5–/+) 20...Bh2–+ 21.Kh1 Be5?? (21...R6e7 22.g3 h6 23.Nf3 Bg3 24.fg3 Qg3 25.Qh5=+) 22.Be5?? (22.Ne6 Re6 23.Qd7 Rh6 24.Qh3 Rh3 25.gh3 Bb2 26.Rfe1–+) 22...Rh6–+ (22...Ne5?! 23.Ne6 fe6 24.Qe4=) 23.Kg1 Ne5 24.Rfe1 Kf8 (24...Rh5 25.Re5 Rf8 26.Nf7 Rh1 27.Kh1 Qf7 28.Qf7 Kf7 29.Rf5 Kg8 30.Rf8 Kf8 31.Rd8 Ke7 32.Ra8+–) 25.f4–/+ (25...Rg6 26.Re5 Re5 27.Nh7 Kg8 28.fe5 Kh7 29.Qe4=+). Van der Braak,Jelle – Heyboer, corr Netherlands, 1990.

9.h3 e5=+ 10.cd5 Nd5 (10...e4 11.Nh2 Nd5 12.Nc3 Nc3 13.Bc3=+) 11.Qb3 N5f6 (11...Qd6 12.Na3 e4 13.Nc4=) 12.Rc1 (12.Nc3 Nb6=) 12...h6 (12...e4 13.Ng5 Ne5 14.Na3=) 13.d4+= e4 (13...ed4 14.ed4 a5 15.Bd3+=) 14.Nh4+– b6? (14...Nb6 15.Ng6 Be6 16.Ne7 Qe7+–) 15.Ng6+– Re8 (15...Qd8 16.Rd1+–) 16.Bc4 Qd8 (16...Bd6 17.Bf7 Kh7 18.Be8 Ne8+–) 17.Bf7 Kh7 18.Nf4 White prepares d5 (18.Ne5 Nf8 19.Nc6 Qc7+–) 18...Nf8 (18...Bd6 19.Ne6 Qe7 20.Be8 Qe8 21.dc5 Nc5 22.Nc5 Bc5 23.Bf6 gf6 24.Nc3+–) 19.d5 (better 19.Nc3!? Bd7 20.Ncd5 Rc8 21.dc5 bc5+–) 19...Bd6 (19...Bf5 20.Rd1 Ng6 21.Be8 Qe8 22.d6 Nf4 23.ef4+– (23.de7 Nh3 24.Kf1 Qe7+–)) 20.Be8 Qe8 21.Na3 (21.Bf6 gf6 22.Nc3 Qe5+–) 21...Be5 (21...Bb7 22.Bf6 gf6 23.Rd1+–) 22.Be5 Qe5 23.Nc4 Qg5 24.Nd6 (24.Rd1 Ng6 25.Qa4 Nh4+–) 24...Bd7 (24...Ng6 25.Nf7 Qf5 26.g4 Ng4 27.Nd6+– (27.hg4?! Qf7 28.d6 Qd7=)) 25.Nf7 Qf5 26.Nd6 (better 26.g4 Ng4 27.Nd6 Qe5+–) 26...Qe5?? (26...Qg5 27.Qc2 Ng6 28.Ne4 Ne4 29.Qe4 Bf5+–) 27.Nc4+– Qg5 28.Nd6 (better 28.d6!? Ng6 29.Qa3 Nh4+–) 28...Ng6?? (better 28...Qe5 29.Ne4 Ne4=) 29.Nf7 Qf5 30.Nd6 Qe5?? (better 30...Qg5=) 31.Nc4+– Qg5 32.Ne6 (better 32.Rd1!? Nf4 33.ef4 Qf4+–) 32...Qf5? (better 32...Be6!? 33.de6 Nh4+–) 33.Nd6. Gross,Wilhelm – Merten,Rainer, 2018.

9.Qb3 b6

10.Nc3 Qd6=.

10.d4 cd4 11.ed4 a6 12.Ba3 dc4 13.Qc4 Qc4 14.Bc4 ab5 15.Be7 bc4 16.Bf8 Kf8 17.Nc3=.

10.d4 cd4 11.ed4 dc4 12.Qc4 Qc4 13.Bc4=.

10.d4 a6

11.a4 Bb7 12.Nc3 a5 (12...cd4 13.Nd4 Nc5 14.Qc2=) 13.Rfd1 (13.cd5 Nd5 14.Rac1 Rac8=) 13...cd4 14.Nd4 (14.Rd4 e5 15.Rd2 dc4 16.Qc4 Rac8 17.Qc7 Rc7=) 14...Nc5 15.Qa2 (15.Qc2 dc4 16.Bc4 Ng4=) 15...dc4 (15...Bd6 16.f4=+) 16.Qc4= Rac8 17.Bf3 Bd6 18.h3 Bh2 19.Kh1 Nfe4 (19...Bf3 20.Nf3 Bd6 21.Rac1=) 20.Ne4 (20.Be4 Ne4 21.Qc7 Bc7 22.Ne4 Be4+=) 20...Ne4+– Do you see the mate threat? 21.Qc7 Bc7 (21...Rc7?? 22.Be4 (22.Kh2?! Nf2 23.Rd2 Ne4+–) 22...Be4 23.Kh2+–) 22.Kg1 (22.Be4 Be4 23.Nc6 Bd8+–) 22...Rfd8 (22...Be5 23.Rab1 Rfd8 24.Nc6 Bc6 25.bc6 (25.Be5?! Bd5+–) 25...Rd1 26.Rd1 Bb2 27.Be4+–) 23.Rac1 (23.Be4 Be4 24.Nc6 Bc6 25.bc6 f6+–) 23...Bb8 (23...Kh8 24.Ba3+=) 24.Nc6 (24.Rc8 Rc8 25.Be4 Be4+–) 24...Bc6 (24...Rd1 25.Bd1 Bd6 26.Bd4+=) 25.Rd8 Rd8 26.Rc6 (26.bc6 Nc5 27.Ba3 Bd6+–) 26...Nc5 27.Bd4 (27.Rb6 Na4 28.Bd4 e5–+ (worse 28...Nb6 29.Bb6 a4 30.Bc5–+)) 27...Na4 28.Bb6 The passed pawn on b5 quickly leads to threats 28...Nb6 29.Rb6 Rc8 (29...e5 30.g4+–) 30.Bc6 (30.g3 h5+–) 30...Rd8 (30...Bd6+=) 31.Bf3 (31.Kf1 Bc7 32.Rb7 Bb8+–) 31...e5 (31...Rc8 32.g3 h5+–) 32.Ra6 (32.g4 g6+–) 32...e4 33.Be2 Kf8 34.Kf1 (34.Ra5 Ke7+–) 34...Rc8 35.g3 Rc1 36.Kg2 Bc7 (36...Rc2!? 37.Bf1 Ke7+–) 37.b6+– Bb8 (better 37...Be5+–) 38.Ra8 Rc8 39.b7 Threatening mate... how?. White gets deadly initiative (worse 39.Ra5 Ke7+–) 39...Rd8 (39...Re8 40.Bb5 (40.Ra5?! Ke7+–) 40...Rd8 41.Bd7+– (41.Ra5?! Rd5+–)) 40.Ra5 (better 40.Bg4!? Ke7 41.Bc8 Bc7 42.Ra5 h6+–) 40...g6 41.Rc5 f5 (41...Ke7 42.Rc8+–) 42.Rc8 Ke7 43.Bb5 (43.Bc4 Be5+–) 43...h5 (43...h6 44.Bc4+–) 44.Bc4 Rf8 (44...Be5 45.Bg8+–) 45.Bg8 g5 Black prepares f4 (45...Be5 46.Bh7 Rf6 47.b8Q Bb8 48.Rb8+–) 46.Bh7 f4 1–0. Alvarez,Aroa – Choque,Jose, Lima op U18, 2000.

11.a4 Bb7 12.Nc3 cd4 13.Nd4 Nc5 14.Qc2=.

11.a4 cd4 12.ed4 ab5 13.cb5=.

11.a4 cd4 12.ed4 ab5 13.Qb5? Ba6 14.Qb3 Bc4 15.Bc4 dc4 –+ (< 15...Qc4 16.Qc4 dc4 17.Rc1–/+).

11.cd5 ed5 12.dc5 Nc5=.

10.d4 Bb7

11.Rc1 a6=.

11.Nc3 cd4 12.Nd4 e5=.

11.Nbd2 dc4 12.Bc4 Rac8 13.Ne5 (better is 13.Rac1=) 13...Rfd8?? (better is 13...cd4 14.Nd7 Qd7 15.Bd4 e5=+) 14.Be6!+– Ne5 (14...fe6 15.Qe6) 15.Bc8 (15.de5 fe6 16.Qe6 Kh8 17.ef6 Bf6 18.Bf6 Rd2+–) 15...Qc8 16.de5 Rd2 17.ef6 Qg4 18.e4 Bd6 (18...Be4 19.g3 Qh3 (19...Bf6 20.Rae1 Bb2 21.Qe3=+) 20.Qf3 Bf3 21.fe7 Qg2) 19.Rae1+= Be4 20.Qh3?? (20.g3 Rd3 21.Qd3 Bd3 22.Re8 Bf8 23.fg7 Qg7 24.Bg7 Kg7 25.Rc1+–) 20...Qh3=+ 21.gh3 Rb2 22.Re4 gf6 (22...Ra2 23.Re8 Bf8 24.fg7 Kg7 25.Rfe1=) 23.Re8 Kg7 24.Rd1 Be5 25.Rdd8 (25.a4!?=) 25...Bd4=+ 26.Rg8 Kh6 27.Rg4 (27...Ra2 28.Rh4 Kg5 29.Rh7–/+). Makowski,Zbigniew – Brachaczek,Pawel, Rybnik, 1988.

11.Nbd2 cd4 12.ed4 dc4 13.Nc4=+.

11.Nbd2 Ng4 12.h3 Nh6 (12...Ngf6 13.cd5 Bd5 14.Qc2=) 13.Rac1 (13.Rfc1 a6=) 13...Nf5 (13...a6 14.ba6 Ba6 15.Rfd1=) 14.Bd3 (14.cd5 Bd5 15.Qc2 Nd6+=) 14...Nd6 15.Qc2 h6 16.a4 Rac8 17.Kh1 (17.cd5 Bd5 18.e4 Bb7+=) 17...Qb8 (17...dc4 18.Nc4 Nc4 19.Qc4=) 18.Qb1 (18.Ne5 Rfd8=) 18...cd4 19.ed4 (better 19.Nd4!? dc4 20.Nc4 Nc4 21.Bc4=) 19...dc4–/+ 20.Nc4 Bf3 21.gf3 Nc4 22.Bc4 Qf4 (22...Nf6!?–/+) 23.Qe4 Bd6 24.Qf4 Bf4 25.Rc3 Nf6 26.Bb3 Rc3 27.Bc3 Rd8 28.Rd1 Nd5 29.Bd2 Bd2 30.Rd2 Ne7 (30...Nf4 31.Kh2–/+) 31.Kg2 Nf5 32.d5 Kf8 (32...Ne7!?–/+) 33.Rd1=+ e5 34.Rc1 (34.f4 ef4 35.Kf3 g5=) 34...Ke7 35.Kf1 (35.f4 ef4 36.Rd1 Rc8–/+) 35...Nd4–/+ 36.Rc7 (36.Ba2 Nf3 37.Ke2 Nd4 38.Ke3 g5–/+) 36...Rd7 (36...Kd6 37.Rc3 Nb3 38.Rb3–+) 37.d6 Kd6 38.Rd7 Kd7 39.Bf7 Nf3 (39...Kd6 40.f4 ef4 41.Bh5–+) 40.Ke2? (40.Kg2 Nd4–+) 40...Ng5 (40...Ng1!? 41.Ke3 Nh3 42.Bd5–+) 41.Bh5 (41.Bg6!?–/+) 41...Kd6–+ 42.Bg4 (42.h4 Ne4–+) 42...Kc5 (42...Ne4!? 43.Bf5 Nc3 44.Kd2 Na4 45.Bc2–+) 43.Ke3 Kd5 (43...Kb4 44.h4 Nh7 45.Bd1–/+) 44.Bf5 (better 44.f4 Ne6 45.Bf3 Kd6 46.fe5 Ke5 47.Bd1–/+) 44...Kc5 45.f4?? (45.Bg4 Kb4 46.h4–+) 45...ef4–+ 46.Kf4 Kd6 (46...Kb4!? 47.h4 Ka4 48.Bd7–+) 47.h4–/+ Ne6 48.Be6? (better 48.Ke3–/+) 48…Ke6–+ 0–1. Sollum,Espen – Pedersen,Thomas, NM Oslo NOR, 1998.

11.Nbd2 Rac8

12.Qa4 cd4 13.Bd4 e5=+.

12.Rfc1 Qb8 13.Ba3 Bd6=.

12.Rfc1 Qb8 13.a4 cd4 14.ed4 dc4 15.Nc4=.

12.Rfc1 Qb8 13.a4 Ne4 14.Ne4 de4 15.Nd2 (15.Ne5 Rfd8=) 15...Nf6 (15...Bd6 16.Nf1=) 16.a5+= Rc7 (16...Rfd8 17.ab6 ab6 18.Qc2+=) 17.ab6 (17.Rd1 Rd8+=) 17...ab6 18.dc5 Rd7 (worse 18...Rc5 19.Bd4+–) 19.Qc2 bc5 20.Nb3 Qc8 (20...Rfd8 21.Rd1+=) 21.Rd1 (21.Be5 Rfd8+=) 21...Rfd8 22.Rd7 Rd7 (22...Nd7 23.Nd2+=) 23.Rd1 (23.Na5 Ba8+=) 23...Kf8 (23...Rd1 24.Qd1 Qc7 25.Qa1+=) 24.Na5 (24.Rd2 Rd2 25.Nd2 Qa8+=) 24...h6 (24...Rd1 25.Qd1 Ba8 26.Nb3+=) 25.Nb7 Qb7 26.Rd7 (26.Rb1 Kg8+–) 26...Qd7 (26...Nd7!? 27.Qa4 Qb8+–) 27.Bf6+– Bf6 28.Qe4 Qd2 (28...g6 29.b6 Kg7 30.b7+–) 29.Bf1 (29.Qa8 Bd8+–) 29...g6+– 30.b6 Qb2 (30...Kg7 31.Qc6 Qb4 32.b7+–) 31.Qc6+– Kg7 32.b7 Bc3 33.f4 (better 33.Qc7 Be5 34.Qc5+–) 33...e5?? (better 33...Be1!? 34.Kh1 Bh4+–) 34.fe5 (34.Qc8 Be1 35.Kh1=) 34...Be5 35.Qc5 h5 (35...Kf6 36.Qc6 Ke7 37.g3+–) 36.Qd5 h4 37.c5 Qc3 38.Kf2 Qc2 39.Be2 Bh2 (39...Qf5 40.Qf3+–) 40.Qd4 (40.Kf3 Bg3+–) 40...f6 41.Qh4 (41.Qd7 Kf8+–) 41...Be5 (41...Qf5 42.Ke1 Bc7 43.Qb4 Bg3 44.Kd2 Qd5 45.Kc2 Qa2 46.Qb2 Qa4 47.Qb3 Qe4 48.Kd2 Qg2 49.b8Q Bb8 50.Qb8 Qd5 51.Bd3 Qc5 52.Qb7 Kh6 53.Qh1 Qh5 54.Qe4+–) 42.Qb4 (42.Qc4!? Qc4 43.Bc4 Kf8+–) 42...Qf5 43.Ke1 Qg5 (43...Bg3 44.Kd2 Qd5 45.Kc2 Qg2 46.Qg4+–) 44.Kd2 (44.Qc4 Qe3 45.c6 Bf4+–) 44...Qg2 45.b8Q The mate threat is Qa7 45...Bb8 (45...Qd5 46.Ke1 Bb8 47.Qb8 Qc5 48.Qf4+–) 46.Qb8 Qd5 47.Ke1 (47.Bd3 Qc5 48.Qb7 Kh6+–) 47...Qc5 48.Qb7 Kh6 49.Qe4 f5 50.Qh4 Kg7 51.Qd4 (51.Kf2 Qc2+–) 51...Qd4 52.ed4 g5 53.Kf2 (53.Bc4 Kf6+–) 53...Kf6 54.Ke3 Ke6 55.Bd3 g4?! (55...Kf6+–) 56.Bc4 Kf6 (56...Ke7 57.Kf4 Kd6 58.Bb3+– (58.Kf5?! g3 59.Bf1 Kd5=)) 57.Kf4 Kg6 (57...Ke7 58.Bd3+–) 58.Be6 Kf6 59.Bf5 g3 60.Bh3 (60.Bh3 Ke7 61.Kg3+–) 1–0. Neuwald,Volker – Malzacher,Wolfgang, Baden–ch HT2, 2002.

12.Rfc1 cd4 13.ed4 dc4 14.Bc4=.

9.Nc3 b6

10.a4 Bb7 11.a5 dc4+= 12.Bc4 Ng4 (12...ba5 13.Qe2+=) 13.e4 Nde5 (13...ba5 14.Qe2+=) 14.Ne5= Ne5 15.ab6 (15.d3 Rfd8 16.ab6 ab6 17.Ra8 Ba8=) 15...ab6+= 16.Ra8 Ra8 17.Qe2 (17.d3 Rd8 18.Qe2 Qd6+=) 17...Qd6 (17...Nc4 18.Qc4 Qf4 19.d4–/+) 18.d3+= Bf6 (18...Bg5 19.Rd1+=) 19.Rd1 (19.Nd1 Qd7+=) 19...Nc4 (19...Ng6 20.Ra1+=) 20.dc4 Bd4 (20...Qf4 21.Bc1 Qc7 22.Bb2+=) 21.Kh1 (21.Nb1 e5+=) 21...Qe5 (21...Qf4 22.f3+=) 22.Qd3 (22.Qd2 Kf8+=) 22...f5 23.ef5 Qf5 (23...Bf2? 24.Qd7 Rb8 25.Nd5 (worse is 25.Qe6 Qe6 26.fe6 Bd4+/–) 25...Qb2 26.Ne7 Kf8 27.Ng6 hg6 28.Qd6 Kg8 29.Qb8 Kh7 30.fg6 Kg6 31.Qb7+–; 23...ef5?! 24.f3+=) 24.Qf5 (24.f3 Qh5=) 24...ef5 25.Kg1 (25.h3 Kf7+=) 25...Kf7 26.Kf1 Bc8 27.Ra1? (better is 27.Rd4 cd4 28.Nd5–+) 27...Ra1–+ 28.Ba1 Be6 (28...Be6 29.Ke1 Bc4–+) 0–1. Rosell,Per – Andersen,Carl J, Denmark, 1983.

10.a4 Bb7 11.cd5!? Nd5 12.Nd5 Bd5 13.Qc2=.

10.a4 dc4 11.Bc4 Bb7 12.Qe2=+.

10.Qa4 Bd6=.

10.Rc1 a6 11.d4=.

10.Rc1 Bb7 11.Qc2 dc4 12.Bc4 Bd6 13.Be2=+.

10.Rc1 Bb7 11.Qc2 Rac8 12.Rfd1 dc4=+ 13.Ng5 (13.Re1 Bf3 14.gf3 Ne5–/+) 13...Ne5 14.Nce4 Threatening mate... how? 14...Ne4 15.Ne4 Bd5 (15...Rfd8 16.Bc4 Nc4 17.Qc4=+) 16.f4 (16.Be5 Qe5 17.Ng3 Bh4=+) 16...Nd3–/+ 17.Bd3 cd3 18.Qd3 Ba2 19.Qc3 Do you see the mate threat? 19...f6 20.d4 (20.Ra1!? Bd5 21.Ng3–/+) 20...Qb7–+ 21.Ng3 cd4 (21...Bd5 22.Qd2–+) 22.Qd4–/+ Bc5 (22...Rc1 23.Rc1 Bd5 24.Qd2–/+) 23.Qd2 (23.Qd3 Bd5 24.Rd2 Qe7–/+) 23...Bb3–+ 24.Re1 a5 (24...Rfd8 25.Qe2–+) 25.ba6–/+ Qa6 26.Ne4 Rfd8 27.Qc3 (27.Nc5 bc5 28.Qf2–/+) 27...Qd3 (better 27...Qb5–+) 28.Nf6?? (better 28.Qd3 Rd3 29.Bd4=+) 28...gf6–+ 29.Qf6 The mate threat is Qg7 29...Qg6 (29...Be3?! 30.Kh1 Qg6 31.Qg6 hg6 32.Rc8 (32.Re3?? Rc1 33.Bc1 Rd1 34.Re1 Re1) 32...Rc8 33.Re3=+) 30.Qh8 (30.Qg6 hg6 31.Bd4 Bd4 32.Rc8 Rc8 33.ed4 Bd5–+) 30...Kf7 31.Qe5 (31.Qc3 Bd5 32.Re2 Bf3–+) 31…Rd2 (31...Rd2 32.g3 Qh6–+) 0–1. Berezny,Jan – Karlik,Vladimir (2360), Decin op, 1997.

10.Rc1 Bb7 11.Qc2 Rac8 12.cd5!? ed5 13.Qf5=.

10.Rc1 Bb7 11.cd5 Nd5 12.Nd5 ed5=.

10.cd5 ed5 11.d4 c4 12.Qc2 Bd6 13.h3 Re8 14.Nd2 Bb7 15.Rac1 Bb4 16.a3 Ba5 17.Bf3 Re6 18.Qf5 The pressure on d5 grows 18...Rae8 19.Rfd1 Bc3 20.Bc3 Nf8 21.Bb4 Ng6 22.Qc2 Nh4 23.Be2 Ne4 (better 23...Qd7 24.a4 Ng6=) 24.Ne4+– Re4 25.Rf1 (better 25.Bd3!?+–) 25...Qd7= 26.a4 Qf5 27.Kh1 Bc8 28.Bd6? (better 28.Kh2=) 28...Qh5?? (better 28...Ng2 29.Kg2 Qh3 30.Kg1 Rh4–+) 29.Bg3 (29.Bh5 Bf5 30.Qd2 R4e6+–) 29...g5?? (29...Qh6 30.Rfd1=) 30.Rfe1 (better 30.Bh5!? Be6+–) 30...Nf5?? (30...g4 31.Kg1+=) 31.Bh2 (better 31.Bh5 Ng3 32.fg3+–) 31...Nd4?? (better 31...Qg6+=) 32.Qc3 (better 32.Qe4 Re4 33.Bh5+–) 32...Nb3 (better 32...Ne2 33.Re2 Qe2–+) 33.Rcd1 (better 33.Bh5 Rh4 34.Bf3 Nc1 35.Rc1 Be6+–) 33...Bb7?? (better 33...g4!?=+) 34.Kg1 (better 34.Bh5 R4e6 35.Bg4+–) 34...Qh6+= 35.f3?? (better 35.Bf3+=) 35...R4e7 (better 35...Re3 36.Bc4 Re1 (36...Rc3 37.Re8 Qf8 38.Rf8 Kf8 39.Bd6 Ke8 40.Bd5 Bd5 41.Rd5=) 37.Re1 Re1 38.Qe1 dc4–+) 36.e4–/+ Qg7 37.e5 Rc8 (37...Nc5 38.a5–/+) 38.Kh1 Nc5 39.Bg1 Ne6 (better 39...Qe5!? 40.Bd4 Qg3–+) 40.a5=+ Nc5 41.ab6 ab6 42.Ra1? (42.Bf1 Rce8–/+) 42...Ree8 (42...Re5?! 43.Bd4 f6 44.Be5 fe5 45.Ra7=+) 43.Rab1 Qf8 (better 43...Qe5!? 44.Bd4 Qd6–+) 44.Bd4=+ Ra8 45.Qd2 h6 1–0. Spicak,Krzysztof (2080) – Kostanski,Marcin, Polfinaly Mistrzostw Polski Seniorow Poland, 2007.

9.d3 b6

10.Na3 a6=.

10.Qb3 Bb7=.

10.Nc3 Bd6=.

10.Nbd2 a6 11.ba6 Ba6 12.Qb3=.

10.Nbd2 a6 11.ba6 Ba6 12.cd5 Nd5 13.Qb3=.

10.Nbd2 a6 11.ba6 Ra6 12.d4=.

10.cd5 ed5 11.Nc3 Re8=.

10.Qc2 Bb7

11.Nbd2 Rad8

12.a3 A) 12...e5 A1) 13.e4 de4 (13...d4 14.Rfb1 Ra8 15.Nh4 Bd8 16.Nf5 a6 17.ba6 Ra6 18.Bc1 Re8=) 14.de4 Rfe8 15.Rfd1 Nh5 16.Ne5 Nf4 17.Ndf3 Bd6 18.Nc6 Bc6=; A2) 13.cd5 Nd5 (13...Bd5 14.e4 Bb7 15.Nc4 Bd6 16.Nh4 Rfe8 17.Nf5 Bf8 18.Qc1 Kh8+=) 14.Nc4 Bf6 15.Rfb1 a6 16.ba6 Ba6 17.a4 Nb4 18.Qb3 Rfe8=; B) 12...a6 B1) 13.cd5 ed5 (13...Nd5 14.ba6 Ba6 15.Rfb1 Bb7 16.d4 Rc8 17.Bc4 cd4 18.Nd4 Nc5=; 13...ab5 14.de6 fe6 15.d4 Bc6 16.Rfd1 Bd6 17.e4 Bf4 18.e5 Nd5=) 14.ba6 Ba6 15.Rfb1 Rfe8 16.a4 Ra8 17.Bc3 Bd6 18.Nb3 d4=+; B2) 13.a4 Ra8 (13...e5 14.cd5 Nd5 15.Nc4 Nb4 16.Qb3 Bf6 17.ba6 Ba6 18.Rfb1 Rfe8=; 13...a5 14.Rfc1 e5 15.cd5 Bd5 16.e4 Be6 17.Ng5 Bg4 18.Bg4 Ng4=; 13...Bd6 14.ba6 Ba6 15.Rfb1 Rfe8 16.cd5 ed5 17.a5 ba5 18.Bc3 Ra8=) 14.cd5 Nd5 15.ba6 Ba6 16.Rfb1 Rfd8 17.Nc4 Bc4 18.Qc4 Qd6=; B3) 13.ba6 Ba6 14.Rab1 Bb7 15.cd5 Nd5 16.Rfc1 Ra8 17.d4 Rfc8 18.Bd3 cd4=; C) 12...Bd6 C1) 13.Rac1 a6 (13...Ng4 14.h3 Nh2 15.Rfd1 Nf3 16.Bf3 dc4 17.d4 cd4 18.Bb7 d3=; 13...dc4 14.Qc4 e5 15.Ne4 Bd5 16.Qa4 Ra8 17.Rfd1 Rfd8 18.Nfd2 a6=; 13...Rfe8 14.Rfe1 a6 15.ba6 Ba6 16.Rb1 Bb7 17.cd5 ed5 18.Rec1 Bc6=) 14.ba6 Ba6 15.cd5 ed5 16.a4 Rfe8 17.Rfd1 Ra8 18.Re1 Bb7=+; C2) 13.cd5 ed5 (13...Bd5 14.Rac1 Ng4 15.h3 Nh2 16.Nh2 Bh2 17.Kh1 Bd6 18.e4 Bb7+=) 14.Rfc1 Rfe8 15.Rab1 Ra8 16.Nb3 Rac8 17.Qd2 Ne5 18.Be5 Be5=; C3) 13.Rad1 a6 (13...Ng4 14.h3 Nh2 15.Nh2 Bh2 16.Kh1 Be5 17.cd5 ed5 18.d4 Bf6+=; 13...a5 14.cd5 ed5 15.Rc1 Rfe8 16.Rfe1 Ng4 17.Nf1 Re7 18.h3 Ngf6=; 13...Rfe8 14.Rfe1 a6 15.ba6 Ba6 16.Rb1 Bb7 17.cd5 ed5 18.Rec1 Ra8=) 14.ba6 Ba6 15.cd5 ed5 16.Rb1 Rfe8 17.Rfc1 d4 18.e4 Qa7=+; C4) 13.Rfd1 a6 (13...Rfe8 14.Rdc1 a6 15.ba6 Ba6 16.Rab1 Bb7 17.cd5 ed5 18.Qb3 Ng4=; 13...a5 14.cd5 ed5 15.Rac1 Rfe8 16.Re1 Ng4 17.Nf1 Re7 18.h3 Ngf6=; 13...e5 14.cd5 Nd5 15.Rac1 f5 16.Nc4 a6 17.Ng5 Rf6 18.Nd6 Qd6+=) 14.ba6 Ba6 15.Rdc1 Bb7 16.cd5 ed5 17.Rab1 Rfe8 18.Qb3 Ng4=; D) 12...dc4 D1) 13.Qc4 Bd6 (13...Ra8 14.Qc2 Rfd8 15.Rfc1 a6 16.ba6 Ra6 17.d4 Raa8 18.Bd3 Rdc8=; 13...e5 14.Ne4 Nd5 15.Rac1 Rfe8 16.Rfd1 Rf8 17.Ng3 Bf6 18.d4 ed4+=; 13...Rfe8 14.Qa4 Ra8 15.Nc4 a6 16.Nfe5 ab5 17.Qb5 Rec8 18.Bf3 Bf3=) 14.Rfc1 e5 15.Qa4 Ra8 16.Qh4 a6 17.ba6 Ba6 18.Rab1 Rfe8=; D2) 13.dc4 Bd6 (13...Ng4 14.Rad1 Bd6 15.h3 Ngf6 16.Rfe1 e5 17.Ng5 h6 18.Nge4 Ne4=; 13...e5 14.Bd3 Bd6 15.Rfd1 Rfe8 16.Ne4 Be4 17.Be4 Ne4 18.Qe4 Nf6=; 13...a6 14.ba6 Ba6 15.Rfd1 Bb7 16.Rab1 Qc6 17.Bd3 Bd6 18.Qb3 Be5=) 14.Bd3 Ne5 15.Be5 Be5 16.Rad1 Rd7 17.Be4 Ne4 18.Ne4 Rfd8=; D3) 13.Nc4 Ra8 (13...Ng4 14.Ncd2 Bd6 15.h3 Nge5 16.Rac1 Nf3 17.Bf3 a6 18.Bb7 Qb7=) 14.a4 a6 15.Nfe5 Rfd8 16.Rfb1 Nd5 17.Bf3 ab5 18.ab5 f6=.

12.Rac1 A) 12...a5 A1) 13.ba6 Ba6 14.Rfd1 Bd6 15.a4 Rfe8 16.cd5 ed5 17.Qb3 Rb8 18.Qc2 b5=; A2) 13.Rfd1 Bd6 (13...e5 14.cd5 Nd5 15.d4 Nb4 16.Qb1 ed4 17.Bd4 Bd5 18.a3 Na2+–; 13...Rfe8 14.cd5 ed5 15.Nd4 Bd6 16.h3 Be5 17.N2f3 Qc8 18.Ne5 Ne5+=; 13...Qd6 14.a3 Rfe8 15.d4 cd4 16.Nd4 Rc8 17.Qb1 Nc5 18.cd5 Nd5+=) 14.cd5 ed5 15.Nb3 Rfe8 16.a4 Rc8 17.h3 Qd8 18.Nh4 g6=; A3) 13.d4 cd4 14.Bd4 e5 15.Bb2 e4 16.Nd4 Bd6 17.cd5 Bh2 18.Kh1 Nd5=; A4) 13.cd5 ed5 (13...Nd5 14.Rfd1 e5 15.d4 Nb4 16.Qb1 ed4 17.Bd4 Bd5 18.a3 Na2+–; 13...Bd5 14.e4 Bb7 15.Nc4 Rfe8 16.Nfe5 h6 17.f4 Rf8 18.a3 Rfe8+=) 14.Nd4 Bd6 15.N2f3 Rfe8 16.Nf5 Re6 17.Rfe1 Qb8 18.Nd6 Qd6+=; B) 12...e5 B1) 13.Nh4 Ra8 (13...Rfe8 14.Nf5 d4 15.Bf3 Bf3 16.Nf3 Bf8 17.Rcd1 Bd6 18.Qa4 Bf8=; 13...a6 14.Nf5 Rfe8 15.ba6 Ba6 16.cd5 Nd5 17.Qa4 Bb7 18.Qg4 g6+=; 13...a5 14.Nf5 Rfe8 15.Bf3 dc4 16.Qc4 Bf3 17.Nf3 Bd6 18.Rfd1 Nf8+=) 14.Nf5 Rfe8 15.cd5 Bd5 16.d4 ed4 17.Bd4 Qb7 18.Bf6 Nf6=; B2) 13.cd5 Bd5 14.Nc4 Bd6 15.Qc3 Rfe8 16.e4 Bc4 17.Qc4 Nf8 18.a3 Ng6=; C) 12...dc4 C1) 13.Qc4 Ra8 (13...Bd6 14.Qa4 Ra8 15.d4 Rfc8 16.Rfd1 Nd5 17.Ne4 Be7 18.dc5 bc5+=; 13...Rfe8 14.Qa4 Qb8 15.Rfd1 Qa8 16.d4 Bd5 17.Bc4 Bd6 18.Qc2 Qb7=; 13...Qb8 14.Rfd1 e5 15.Qa4 Nd5 16.Nc4 Bf6 17.Nfd2 Be7 18.Bf3 f5+=) 14.Rfd1 Rfd8 15.a4 a6 16.d4 ab5 17.ab5 Bd5 18.Qc3 Ra2=; C2) 13.dc4 Bd6 (13...Ra8 14.Rcd1 a6 15.a3 Rfd8 16.Bd3 Bd6 17.ba6 Ra6 18.Be4 Bc6=; 13...Ng4 14.Rcd1 Bd6 15.h3 Ngf6 16.Ng5 h6 17.Nge4 Bh2 18.Kh1 Ne4=; 13...e5 14.Bd3 Rfe8 15.Rcd1 Bd6 16.e4 a6 17.ba6 Ba6 18.Rb1 Bb7=) 14.Bd3 Ra8 15.Rfd1 a6 16.ba6 Ra6 17.a3 Ne5 18.Be5 Be5=; C3) 13.Nc4 Ng4 14.Ncd2 Bd6 15.h3 Nh2 16.Rfd1 Nf3 17.Bf3 a6 18.ba6 Ba6+=; D) 12...a6 D1) 13.ba6 Ba6 14.Rfd1 Bd6 15.a4 Rfe8 16.Rb1 Bb7 17.cd5 ed5 18.d4 c4=+; D2) 13.a4 Bd6 (13...Rfe8 14.ba6 Ba6 15.cd5 ed5 16.Rb1 Bd6 17.Rfc1 d4 18.e4 Qa7=+; 13...Ra8 14.ba6 Ra6 15.d4 dc4 16.Bc4 Ra7 17.dc5 Nc5 18.Bb5 Rc8=; 13...ab5 14.ab5 e5 15.cd5 Nd5 16.Nc4 Nb4 17.Qd2 Bd6 18.Nh4 Rfe8=) 14.ba6 Ba6 15.cd5 ed5 16.Rb1 Rfe8 17.Rfc1 d4 18.Nd4 Bh2=+; D3) 13.cd5 Nd5 (13...ed5 14.Nd4 Bd6 15.N2f3 Ne5 16.Ne5 Be5 17.f4 Bd4 18.ed4 Nd7=) 14.d4 Ra8 15.dc5 Nc5 16.Bd4 ab5 17.Bb5 Ba6 18.a4 Bb5=.

12.Rfc1 A) 12...a6 A1) 13.cd5 ed5 (13...Nd5 14.ba6 Ba6 15.a4 Ra8 16.Qb3 Bb7 17.Nc4 Rfd8 18.Nfe5 Nb4=) 14.ba6 Ba6 15.Rab1 Rfe8 16.Qb3 Qd6 17.a4 Ra8 18.Qc2 Bb7=; A2) 13.a4 Ra8 (13...dc4 14.Nc4 Ra8 15.Qc3 Rfd8 16.Rc2 Bd5 17.Na3 Ra7 18.e4 Bb7=; 13...Bd6 14.ba6 Ba6 15.cd5 ed5 16.Bc3 Ra8 17.a5 ba5 18.Ba5 Qb8=; 13...a5 14.cd5 Nd5 15.d4 Nb4 16.Qb1 Rc8 17.Ba3 Nd5 18.Bd3 f5=) 14.ba6 Ba6 15.Rab1 Bb7 16.cd5 Bd5 17.Ra1 Rfc8 18.Nc4 Rd8=; A3) 13.ba6 Ba6 14.a4 Bb7 15.cd5 Nd5 16.d4 Bd6 17.Ne4 Rc8 18.Nd6 Qd6+=; B) 12...Bd6 B1) 13.a3 Rfe8 (13...dc4 14.Qc4 Bd5 15.Qh4 e5 16.e4 Bb7 17.Nc4 Rfe8 18.a4 a6=; 13...e5 14.cd5 Nd5 15.Nc4 Rfe8 16.Nfd2 a6 17.ba6 Ba6 18.d4 Bc4=; 13...Ng4 14.h3 Ngf6 15.cd5 ed5 16.Nd4 Rfe8 17.Nf5 a6 18.ba6 Ba6=) 14.cd5 ed5 15.Rab1 Ra8 16.Nb3 Rac8 17.Qd2 Ne5 18.Be5 Be5=; B2) 13.Qc3 Ra8 (13...Rfe8 14.cd5 ed5 15.d4 Rc8 16.Bd3 c4 17.Bf5 Ne4 18.Ne4 de4=; 13...Rde8 14.cd5 ed5 15.d4 Rc8 16.a4 Rfe8 17.a5 Qb8 18.a6 Ba8=; 13...e5 14.cd5 Nd5 15.Qc4 Ra8 16.Qh4 a6 17.d4 ed4 18.Nd4 Qd8=) 14.cd5 ed5 15.d4 Rfe8 16.a4 c4 17.Ba3 a6 18.Bd6 Qd6=; B3) 13.Qa4 a6 (13...a5 14.cd5 Bd5 15.e4 Bb7 16.Nc4 Bf4 17.Rc2 Ng4 18.g3 Bd6=) 14.ba6 Ra8 15.Qc2 Ra6 16.d4 Ra7 17.cd5 ed5 18.dc5 bc5=; B4) 13.cd5 ed5 14.Nb3 Rfe8 15.Nbd4 Ne5 16.Nf5 Nf3 17.Bf3 d4 18.Bb7 Qb7+=; C) 12...e5 C1) 13.Nh4 d4 (13...Rfe8 14.Nf5 d4 15.Bf3 Bf3 16.Nf3 Bf8 17.Rd1 de3 18.fe3 e4=; 13...Bd6 14.Nf5 d4 15.Qa4 a5 16.ba6 Ra8 17.Bf3 Ra6 18.Qd1 de3=; 13...Ra8 14.Nf5 Rfe8 15.cd5 Nd5 16.d4 ed4 17.Bd4 Bf6 18.Bf6 N7f6=) 14.Nf5 Bd6 15.Qa4 a5 16.ba6 Ra8 17.Bf3 Ra6 18.Qd1 de3=; C2) 13.cd5 Bd5 14.Nc4 Bd6 15.Nd6 Qd6 16.a4 Rfe8 17.Qc3 a6 18.ba6 Ra8+=; D) 12...a5 D1) 13.cd5 Bd5 (13...Nd5 14.a3 e5 15.Nc4 Bd6 16.Nfd2 f5 17.Bf3 Kh8 18.Rab1 Be7+=; 13...ed5 14.Nd4 Bd6 15.N2f3 Ne5 16.Nf5 Nf3 17.Bf3 Bh2 18.Kh1 Bd6=) 14.Nc4 Ng4 15.h3 Bf3 16.Bf3 Qh2 17.Kf1 Nge5 18.Ne5 Ne5=; D2) 13.Qc3 e5 (13...Rfe8 14.cd5 ed5 15.d4 c4 16.Ba3 Ba3 17.Qa3 Rc8 18.Rc3 Qb8=; 13...Bd6 14.cd5 ed5 15.d4 Rfe8 16.Bd3 c4 17.Ba3 Rc8 18.Bd6 Qd6=; 13...Qd6 14.a3 Rfe8 15.Rc2 Bf8 16.cd5 Nd5 17.Qc4 e5 18.Qg4 N5f6=) 14.Ne5 Ne5 15.Qe5 Bd6 16.Qg5 Bh2 17.Kh1 d4 18.Nf3 Bf3=; D3) 13.ba6 Ba6 14.cd5 Nd5 15.Rab1 Bb7 16.d4 Ra8 17.dc5 Nc5 18.Be5 Qd8+=.

12.Rad1 a6 A) 13.cd5 ed5 (13...ab5 14.de6 fe6 15.d4 c4 16.Ng5 Qd6 17.Bg4 Ra8 18.Be6 Kh8+–; 13...Nd5 14.ba6 Ba6 15.Rb1 Bb7 16.Rfc1 Ra8 17.Ba1 Qd8 18.a3 Re8=) 14.ba6 Ba6 15.a4 Rfe8 16.Rb1 Bd6 17.Rfc1 d4 18.e4 Qa7=+; B) 13.a4 Bd6 (13...ab5 14.ab5 Ra8 15.Ra1 e5 16.Nh4 Bd6 17.Nf5 Rfd8 18.cd5 Bd5=; 13...e5 14.ba6 Ba6 15.cd5 Nd5 16.Rb1 Bb7 17.Rfc1 Rfe8 18.Nc4 Bf6=; 13...Ra8 14.cd5 ed5 15.Bc3 Bd6 16.Rfe1 Rfe8 17.Rc1 ab5 18.ab5 Ng4=+) 14.ba6 Ba6 15.cd5 ed5 16.Rb1 Rfe8 17.Rfc1 d4 18.Nd4 Bh2=+; C) 13.ba6 Ba6 14.a4 dc4 15.Nc4 Bb7 16.Nfe5 Nd5 17.Qb3 Nb4 18.Bf3 Bf3=.

12.Rad1 Bd6 13.h3 (13.cd5 ed5 (13...Bd5 14.Ne4 e5 15.Nc3 Bb7 16.Qa4 Ra8 17.Qh4 a6 18.d4 cd4=; 13...Nd5 14.Ne4 Be7 15.Rc1 e5 16.Qa4 f5 17.Ned2 Qb8 18.Nc4 Bf6=) 14.Rb1 Rde8 15.Rfc1 Ng4 16.h3 Ngf6 17.a3 a6 18.ba6 Ba6=; 13.a3 Rfe8 (13...a6 14.ba6 Ba6 15.cd5 ed5 16.Rb1 Rfe8 17.Rfc1 d4 18.e4 Qa7=+; 13...a5 14.cd5 ed5 15.Rc1 Rfe8 16.Rfe1 Ng4 17.Nf1 Re7 18.Qa4 Ngf6=; 13...Ng4 14.h3 Nh2 15.Nh2 Bh2 16.Kh1 Be5 17.cd5 ed5 18.d4 Bf6+=) 14.Rfe1 a6 15.ba6 Ba6 16.Rb1 Bb7 17.a4 Ra8 18.cd5 ed5=+; 13.Rfe1 Rfe8 (13...a6 14.ba6 Ba6 15.cd5 ed5 16.Rb1 Rfe8 17.a4 Ra8 18.Qb3 Reb8=; 13...a5 14.ba6 Ba6 15.cd5 ed5 16.Rb1 Rfe8 17.a4 Ra8 18.Qb3 Reb8=; 13...e5 14.e4 d4 15.Rb1 Ra8 16.Bc1 a6 17.a3 ab5 18.Rb5 Ba6=+) 14.cd5 ed5 15.Rc1 Ra8 16.Nb3 a6 17.ba6 Ra6 18.a3 Ng4=+) 13...e5 (13...a6 14.ba6 Ba6 15.cd5 ed5 16.Rb1 Rfe8 17.Rfc1 Ra8 18.Qb3 b5=+; 13...a5 14.cd5 ed5 15.Rfe1 Rfe8 16.a3 Re7 17.Nh4 Rde8 18.Nf5 Re6=; 13...Ra8 14.cd5 ed5 15.Rc1 a6 16.ba6 Ra6 17.a3 Re8 18.Nb3 Bc6=+) 14.cd5 Bd5 (14...Nd5 15.Ne4 Be7 16.Qc4 Kh8 17.Nc3 Qd6 18.Qa4 Nc3=) 15.a4 (15.Nc4 Rfe8 16.Nfd2 Be7 17.Bf3 a6 18.ba6 b5+=) 15...Rfe8 16.Nc4 Bf8 (16...Re7 17.Nfd2 Bb7 18.a5 ba5=) 17.Qc3 (17.e4 Bb7 18.a5 Bc8+=) 17...Bc4 (17...Bd6 18.a5 Bc4=) 18.Qc4 e4 (18...Qd6+=) 19.Ng5 Ne5 20.Be5 Re5 21.Ne4 Ne4 22.de4 Rde8 23.Bf3 Be7 24.Rd5 Bf6 25.Rfd1 Rd5 26.ed5 Be5 27.e4 Qe7 28.Bh5 Bd6 29.Re1 Qe5 30.Bf3 Qf4 31.Qc1 Qc1 32.Rc1 Re5 33.g3 Kf8 34.Bg2 f6 35.f4 Re8 36.h4 h6 37.Kf2 Rc8 38.Bh3 Rc7 39.Bf1 g5 40.hg5 hg5 41.Kf3 gf4 42.gf4 Rh7 43.Rc2 (better 43.Re1!?+–) 43...Rh4+= 44.e5 fe5 45.fe5 Be5 46.Rc4 Bd4 47.Kg3 Re4 48.Kh3 Ke7 49.Rc2 Re3 50.Kg4 Ra3 51.Re2 Kd6 52.Bg2 Be5 53.Kf5 Rg3 54.Bh1 Rg1 55.Be4 (55.Re5 Rf1 (55...Rh1?! 56.Re6 Kd5 57.Re7–/+) 56.Bf3 Rf3 57.Ke4 Re3 58.Ke3 Ke5–+) 55...Rf1 56.Kg6 c4 57.Bg2 Rf6 58.Kg5 c3 59.Rc2 Rf4?? (better 59...Rf8=+) 60.Rc3!+– Ra4? (60...Bc3 61.Kf4 Deflection (61.Kf4 Overloading)) 61.Rc6+– Kd7 62.Bh3 Kd8 63.d6 Bd6 64.Rd6 Ke7 65.Re6 Kf7 ½–½. Latka,Tadeusz – Makowka,Kamil (1840), Mistrzostwa KKSz Seniorow Krakow Poland, 2010.

12.Rad1 e5 A) 13.cd5 Nd5 14.Qa4 f5 15.Nc4 Bf6 16.Nfd2 a6 17.ba6 Ra8 18.Bf3 Rf7=; B) 13.a3 Bd6 (13...a6 14.ba6 Ba6 15.Nh4 Rfe8 16.Nf5 Bb7 17.Bf3 Bc6 18.cd5 Bd5=; 13...a5 14.cd5 Nd5 15.Nc4 Bf6 16.Nfd2 Be7 17.Bf3 h6 18.Rfe1 Rfe8+=; 13...d4 14.Nh4 Rfe8 15.Nf5 Ra8 16.Bf3 Bf3 17.Nf3 a6 18.Qa4 Nf8=) 14.cd5 Nd5 15.Ne4 Be7 16.Nc3 Nc3 17.Qc3 Bd6 18.Qc4 Nf6=; C) 13.Rde1 Rfe8 (13...a6 14.ba6 Ba6 15.Nh4 dc4 16.Nf5 Rfe8 17.Nc4 b5 18.Na3 b4=; 13...a5 14.ba6 Ba6 15.cd5 Nd5 16.Rb1 Nb4 17.Qb3 Bb7 18.Rfc1 Bd6=; 13...e4 14.de4 de4 15.Ng5 Bd6 16.Nge4 Bh2 17.Kh1 Ne4 18.Ne4 Be5=) 14.e4 d4 15.Rb1 Nh5 16.Bd1 Nf4 17.g3 Ne6 18.Bc1 Rf8=+; D) 13.Rfe1 e4 (13...a6 14.cd5 ab5 15.d4 Nd5 16.Bb5 ed4 17.ed4 Qf4 18.dc5 Nc5=; 13...a5 14.cd5 Bd5 15.Nc4 Bd6 16.Nfd2 Be7 17.Bf3 Be6 18.Bc6 Bd5=; 13...Rfe8 14.cd5 Nd5 15.Qa4 Qb8 16.Nc4 Bf6 17.Nfd2 Bg5 18.Ne4 Be7+=) 14.de4 de4 15.Ng5 Bd6 16.Nge4 Bh2 17.Kh1 Be5 18.Be5 Qe5=.

12.Rad1 Rfe8 A) 13.a3 Bd6 (13...a6 14.ba6 Ba6 15.cd5 ed5 16.Rb1 Bd6 17.Rfc1 d4 18.e4 Qa7=+; 13...Ra8 14.Rc1 dc4 15.Nc4 a6 16.ba6 Ra6 17.Rb1 Ng4 18.e4 f5=; 13...a5 14.cd5 ed5 15.Rc1 Bd6 16.Rfe1 Ng4 17.Nf1 Re7 18.h3 Ngf6=) 14.Rfe1 a6 15.ba6 Ba6 16.a4 Bb7 17.cd5 ed5 18.Rc1 Ra8=+; B) 13.cd5 ed5 (13...Nd5 14.d4 Rc8 15.dc5 Nc5 16.Be5 Bd6 17.Bd6 Qd6 18.Nc4 Qe7=) 14.Rb1 Bd6 15.Rfc1 Ra8 16.d4 c4 17.Bc3 a5 18.ba6 Ra6=; C) 13.Rfe1 Ra8 (13...a6 14.ba6 Ba6 15.cd5 Nd5 16.Rb1 Bb7 17.Ne4 Ra8 18.Qb3 e5=; 13...e5 14.cd5 Nd5 15.Qa4 Ba8 16.Nc4 Bf6 17.Nfd2 Be7 18.Bf3 a5+=; 13...Bd6 14.cd5 ed5 15.Rc1 Ra8 16.Nb3 a6 17.a4 ab5 18.ab5 Ng4=+) 14.Bf6 Nf6 15.cd5 ed5 16.d4 Bd6 17.dc5 bc5 18.a4 Rac8=+; D) 13.Rc1 Bd6 (13...a6 14.ba6 Ba6 15.a4 Bd6 16.Rb1 Bb7 17.Bf6 Nf6 18.Qb2 dc4=; 13...a5 14.cd5 ed5 15.Nd4 Bd6 16.N2f3 Ne5 17.Ne5 Be5 18.f4 Bd4=; 13...e5 14.cd5 Nd5 15.Qa4 Qb8 16.Nc4 Bf6 17.Nfd2 Rf8 18.Ne4 Be7+=) 14.cd5 ed5 15.a4 Rc8 16.Rfe1 Ra8 17.Nb3 a6 18.Nbd4 Ne5=.

12.cd5 ed5 A) 13.a4 Bd6 (13...Rfe8 14.a5 Bd6 15.d4 Rc8 16.Qc3 Qb8 17.Rfc1 Ne4 18.Ne4 de4=+; 13...a6 14.ba6 Ba6 15.Rfb1 Ra8 16.Bc3 Rfe8 17.Nb3 Qd6 18.a5 b5=; 13...a5 14.ba6 Ba6 15.Rfb1 Ra8 16.Bc3 Rfe8 17.Nb3 Qd6 18.a5 b5=) 14.a5 Rfe8 15.d4 Rc8 16.Qc3 Qb8 17.Rfc1 Ne4 18.Ne4 de4=+; B) 13.Qa4 Rfe8 (13...a5 14.ba6 Ra8 15.Qc2 Ra6 16.Rfc1 Rfa8 17.a3 Bd6 18.Nb3 Ra4=+; 13...Ra8 14.Nh4 Bd6 15.Ndf3 a6 16.Nf5 ab5 17.Qb5 Rfe8 18.Rfe1 Ba6=; 13...a6 14.ba6 Ra8 15.Rfb1 Ra6 16.Qc2 Rfa8 17.Bc3 Bc6 18.Nf1 Bd6=+) 14.Rac1 Ra8 15.d4 a6 16.dc5 ab5 17.Qb3 bc5 18.Bb5 Ba6=+; C) 13.a3 a6 (13...Bd6 14.Rfc1 Rfe8 15.Rab1 Ra8 16.Nb3 Rac8 17.Qd2 Ne5 18.Be5 Be5=; 13...Rfe8 14.Rfc1 Bd6 15.Rab1 Ra8 16.Nb3 Rac8 17.Qd2 Ne5 18.Be5 Be5=; 13...a5 14.ba6 Ba6 15.Rfb1 Rfe8 16.a4 Bd6 17.a5 ba5 18.Bc3 Rb8=) 14.ba6 Ba6 15.Rfb1 Rfe8 16.Qb3 Bb7 17.a4 Bc6 18.Nf1 Ra8=; D) 13.Rfc1 a6 (13...Bd6 14.Nb3 Rfe8 15.Nbd4 Ne5 16.Nf5 Nf3 17.Bf3 d4 18.Bb7 Qb7+=; 13...Rde8 14.Nd4 Bd6 15.N2f3 Ne5 16.Nf5 Nf3 17.Bf3 Bh2 18.Kh1 Bc8=; 13...Rfe8 14.Nd4 Bd6 15.N2f3 Ne5 16.Nf5 Nf3 17.Bf3 d4 18.Bb7 Qb7+=) 14.ba6 Ba6 15.a4 Rfe8 16.Nb3 Qd6 17.Rcb1 Rb8 18.Bc3 Qe6=.

10.Nbd2 Bb7

11.Qc2 a6=.

11.Qc2 dc4 12.Qc4 a6 13.a4=.

11.Qc2 dc4 12.Nc4 a6=.

11.Qc2 Rac8 12.Rfc1 e5=.

11.Qc2 Rac8 12.Rfd1 Bd6 13.Rac1=.

11.Qc2 Rac8 12.Rfd1 Rfe8 13.Rac1 e5 (13...Bd6 14.cd5 ed5 15.Re1=) 14.Nf1 (14.cd5 Nd5 15.Qa4 Bf6=) 14...d4 15.e4 (15.Ng3 Ra8=) 15...Nf8 (15...Ra8 16.Ng3=+) 16.Ra1 (16.Rd2 Ra8=+) 16...Ne6 (16...Ra8 17.Ng3=) 17.Bc1 (17.Ng3 Ra8=) 17...Ra8 18.Ng3 a6 19.a4 (19.ba6 Ra6 20.Nf5 Bc6=) 19...ab5 20.cb5 Ra7 (20...Qb8 21.Nf5=) 21.Nd2 Rea8 (21...Nf4 22.Nc4=) 22.Nc4 Nd7 23.Bd2 (23.Bg4 Bh4=) 23...Bc8 (23...Qd8 24.Bg4=) 24.Rf1 (24.a5 ba5 25.Rdb1 Qb8+=) 24...Qb8 (24...Qd8 25.Bg4=) 25.Bg4 (25.Nf5 Bf8 26.Rfb1+=) 25...Nc7 (25...Nf6!? 26.Bh3 Bd7=) 26.Rfb1 (26.Bd7 Bd7 27.a5 Ra5 28.Ba5 (28.Na5?! ba5 29.f4 Nb5+=) 28...ba5 29.b6+–) 26...f6? (better 26...Ne8!?+=) 27.Qb3 (27.a5 Rb7+–) 27...Kh8 28.Nf5 h5 (28...Bf8 29.Nfd6 h5 30.Nc8 hg4 31.Na7 Ra7 32.Qd1+–) 29.Bh5 (better 29.Ne7 Nf8 30.Nc8 hg4 31.N8b6+–) 29...Bf8 (29...Bd8 30.Na5! Nf8+–) 30.Bg6 (30.Qd1 Bb7 31.Bg6 Kg8 32.Qh5 Bd6 33.Qh7 Kf8 34.Qg7) 30...Ne6 (30...Ra6 31.Qd1 Kg8 32.Qh5 Bd6 33.Qh7 Kf8 34.Qg7) 31.Qd1 (31.Qd1 Nf4 32.Bf4 Kg8 33.Qh5 Bd6 34.Qh7 Kf8 35.Qg7) 1–0. St_Jean,Benoit – Gauthier,Daniel, Montreal, 2000.

11.Qc2 Rac8 12.Rfd1 Rfe8 13.Rdc1 Bd6=.

11.Qc2 e5 12.e4 d4 13.Rfe1 (13.Nh4 Qd8=) 13...h6 14.h3 (14.Nh4 Bd6=) 14...Nh7 15.Nf1 f5 16.ef5 Rf5 17.Ng3 Rf7 18.Rad1 Raf8 19.Bc1 Qd6 20.Rf1 Qg6 21.Kh2 (21.Qa4 Ra8=+) 21...Nhf6 (21...a6 22.ba6 Ba6 23.Rde1=+) 22.Nh4 (22.Rde1 a6=) 22...Qh7 (22...Ng4! 23.Bg4 Bh4=+) 23.Nhf5= Ne8 24.Ne7 Re7 25.Bg4 Ndf6 26.Bf5 g6 27.Be4 Ne4 28.Ne4 Be4 29.de4 Nd6 30.Bd2 g5 31.f3 Ref7 32.Kg1 Qg6 33.Qd3 h5 34.Qe2 (34.Kh2 g4=+) 34...g4–/+ 35.fg4? (better 35.Kh2!?–/+) 35...Rf1 36.Rf1 Rf1 37.Kf1 (37.Qf1 hg4 38.h4 Ne4–+) 37...hg4 (37...Ne4?! 38.gh5 Nd2 39.Qd2 Qh5 40.Qd3=+; 37...Qe4?! 38.gh5 Qe2 39.Ke2 Nc4 40.Bc1–+) 38.Qg4 (38.Be1 Qe4 39.Qe4 Ne4–+) 38...Qg4 39.hg4 Ne4 (39...Ne4 40.Bh6 Nd6–+) 0–1. Fournier,Frederic – Waquet Frederic, FRA Ch (Team) N4 Senlis–SaintQuentin, 1998.

11.cd5 Nd5 12.Qc2 a6 13.ba6 Ra6=.

11.h3 a6=+ 12.a4 ab5 13.ab5 e5 (13...Ra1 14.Ba1 Bd6 15.Qc2=) 14.Qc2 d4 (14...Bd6 15.e4 d4 16.Nh4=) 15.e4 (15.Nh4 Qd6=) 15...h6 (15...Nh5 16.g3=+) 16.Ra8 Ra8 17.Ra1 Nh7 (17...Ra1 18.Ba1 Qd8 19.Bb2=) 18.Ra8 Ba8 19.Qa4 (19.Nf1 Ng5=) 19...Qb8 (19...Bb7 20.Bc1=) 20.Nh2 (20.Bc1 Bb7=) 20...Bd6 21.Ndf1 Nhf8 22.g4 (22.Ng3!?=) 22...Ne6 23.Bc1 Kh7 (23...Ndf8 24.Ng3=+) 24.Ng3= g6 (24...Ndf8=) 25.f3 (25.Nf3!?=) 25...Bb7 (25...Qd8 26.Bf1=+) 26.Kf2 (26.Bf1 Be7–/+) 26...Ndf8 (26...Qd8 27.Qa7 Bc8 28.Qa8–/+) 27.Qa2 (27.Bf1 Nf4–/+) 27...Be7 28.Qd2 (28.Bf1 Nf4–/+) 28...Bg5 29.Qd1 (29.Qc2 Bc1 30.Qc1 Nf4–+) 29...Bc1–+ 30.Qc1 Nf4 31.Bf1 N8e6 32.h4 (better 32.Ke1–/+) 32...Qd8–+ 33.h5 (33.Be2 Qh4 34.Nhf1–+) 33...Qh4 34.hg6 fg6 (34...Kg6 35.Kg1 Qg3 36.Kh1–+) 35.Bg2 (35.Kg1 Qg3 36.Kh1–+) 0–1. Ruhle,Ernst_Albrecht – Luethi,M, Bad Ragaz, 2006.

11.h3 a6=+ 12.ba6 Ra6 13.Qb3 Rfa8=+.

11.h3 a6 12.ba6 Ra6 13.d4=+.

11.h3 Rad8 12.Qc2= Bd6 13.d4 (13.cd5 Nd5 14.Nc4 e5=) 13...cd4 14.ed4 (14.Nd4 Rc8=) 14...Rc8 (14...dc4 15.Nc4 Nd5 16.Rfe1=+) 15.Rfc1 Bf4 (15...dc4 16.Qa4 Bf4 17.Rc4 Qb8=+) 16.Rd1 (16.Ba3!? Rfe8 17.c5 bc5 18.dc5=) 16...dc4–/+ 17.Qc4 Qb8 (17...Qc4 18.Nc4 Bf3 19.gf3–/+) 18.Qd3 (18.Qa4 Bd5=+) 18...Rfd8 19.Nb3?? (better 19.Rac1=+) 19...Be4–+ 20.Qc3 Rc3 21.Bc3 Rc8 (21...Nd5 22.Bd2–+) 22.Bd2 Nd5 (better 22...Bd5 23.Rdc1 Rd8 24.Rc2–+) 23.Bf4 (23.Rdc1 Bc2–+) 23...Nf4 24.Kf1 (24.Bf1 Bf3 25.gf3 Rc3–+) 24...Rc2 (24...Ne2 25.Ke2 Rc2 26.Rd2–+) 25.Nbd2 (25.Rd2 Qc7–+) 25...Nf6 (25...Qb7 26.a4–+) 26.a4 (26.Ne1 Rb2–+) 26...Ne2 27.Ke2 Nd5 (27...Bf3!? 28.gf3 Qc7 29.a5–+) 28.Ke1 (28.Kf1 Bd3 29.Kg1 Nc3–+) 28...Bf3 29.Nf3 Qf4 30.a5 (30.Kf1 Ne3! 31.fe3 Qe3 32.Nd2 Rd2 33.Rd2 Qd2 34.Re1–+) 30...Qe4 31.Kf1 Qe2 32.Kg1 Qf2 (32...Qf2 33.Kh2 Qg2) 0–1. Ruhle,Ernst_Albrecht (1605) – Accola,Martin (1870), 03 sen. Bad Ragaz (SUI) op, 2005.

10.Nbd2 dc4

11.dc4 a6 12.ba6 Ra6 13.Bd3=.

11.dc4 Rd8 12.Qc2=.

11.Nc4 a6 12.Qa4 Bb7=.

11.Nc4 a6 12.Qa4 Nd5=.

11.dc4 Bb7

12.Qb3 Rfd8=.

12.Qc2 a6 13.Rfd1=.

12.Qc2 Rfd8 13.Rfd1=.

12.Qc2 Rfe8 13.Rfd1 Red8=.

12.Qc2 Rfe8 13.Bd3 a6 14.Rfd1=.

12.Qc2 Rfe8 13.Bd3 Bf8 14.e4 (14.Ne4 Be4 15.Be4 Ne4 16.Qe4 f5+=) 14...e5= 15.a4 (15.Rfd1 a6=) 15...Bd6 (15...a5 16.Rfe1=) 16.Bc3 (16.a5 a6=) 16...Nf8 (16...a5 17.Rfe1=) 17.a5 Ne6 18.a6 (18.Rfe1 Nd4 19.Qb1 ba5 20.Ra5 a6=) 18...Bc8 19.Rfe1 Nf4 (19...Nd4 20.Qb2=) 20.Bf1 (20.Rad1 Rd8=) 20...Bg4 21.h3 Bh5 (21...Bd7 22.Rad1=) 22.Nh4 (22.Qb2 Rad8=) 22...Qd7 (22...Rad8 23.g4 Bg6 24.Rad1=) 23.Nf5 (better is 23.Kh2=) 23...g5 (better is 23...Rad8!?=) 24.g4 Bg6 25.Nf3 Bf5 26.ef5 h5 (26...Qc7 27.Ng5 h5 28.gh5 N6h5 29.Ne4+/–) 27.Be5 (27.Ne5!? Be5 28.Be5 Re5 29.Re5 hg4+–) 27...Be5+/– 28.Ne5 Qc7 29.Qb2 hg4 30.hg4 Rad8 31.Nc6?? (better is 31.Qc3+/–) 31...Ng4–+ 32.f3 Re1 (32...Nh3 33.Bh3 Qg3 34.Kf1 Qh3 35.Qg2 Nh2 36.Kg1 Nf3 37.Kf1 Qf5 38.Ne7 Re7 39.Re7 Nh4 40.Qf2 Qh3 41.Ke1 Qc3 42.Kf1 Qa1 43.Re1–+) 33.Re1 Nh3!! 34.Bh3 Qg3 35.Qg2 (35.Kf1 Ne3!! 36.Ke2 Nc4 37.Nd8 Nb2 38.Nc6 Qh3 39.Rf1–+) 35...Qe1 36.Qf1 Qg3 (37.Qg2 Rd1) 0–1. Frank,Volkmar – Piralizai,Kharoon, Germany, 2006.

12.Qc2 Ng4 13.Bd3 f5 14.e4 Nde5 15.Ne5 Ne5 16.Be5 Qe5 17.Rad1=.

12.Qc2 Ng4 13.Bd3 h5 14.h3+= Nge5 15.Bh7 Kh8 16.Be4 (16.Ne5 Ne5 17.Be4 Be4 18.Ne4 Rfd8+=) 16...Nf3 17.Nf3 Bf6 (17...a6 18.Bb7 Qb7 19.Rfd1+=) 18.Bf6 Nf6 19.Bb7 Qb7 20.Ne5 Qc7 (20...a6 21.a4+=) 21.f4 (21.Nc6 a6+=) 21...a6 22.a4 ab5 (22...Kg8 23.Nc6+=) 23.ab5 Ra1 (23...Qb7 24.Ra8 Ra8 25.Nc6+/–) 24.Ra1+/– Qb7 25.Ra6 Rd8 26.Nc6 Rd7 27.Kh2 (better is 27.Qa4 Qc7 28.Ra8 Kh7 29.Rf8+–) 27...Rc7? (better is 27...Kg8+–) 28.Qa2 (28.Qa4 Kh7 29.Ra7 Qc8+–) 28...Rc6 29.Ra7 (29.bc6?! Qc6 30.Qb3 Qe4+–) 29...Qc7 (29...Qc8 30.Ra8 Ne8 31.Rc8 Rc8+–) 30.Rc7 (30.bc6?! Qc6 31.Rf7 Qe4+–) 30...Rc7 31.Qa8 Kh7 32.Qb8 Rd7 33.Qb6 Rd2 (33...Rd1 34.Qc5 h4 35.b6+–) 34.Qc5 (34...Kg6 35.b6+–) 1–0. Kreuzer,Uwe – Oberling, Vereinspokal, 1992.

12.Qc2 Ng4 13.h3 Nge5=.

12.Bd3 Rfd8=.

9.d4 Ne4

10.Qc2 cd4 11.Nd4 Bd6 12.h3=+.

10.Qc2 Ndf6 11.Nbd2 b6 12.Rac1 Bb7 (12...Bd6 13.Ne4 Ne4 14.Bd3+=) 13.Ne5 (13.Ne4 Ne4 14.Bd3 Rac8+=) 13...Rac8 (13...Bd6 14.Ne4 Ne4 15.Bd3=) 14.f3 (14.Ne4 Ne4 15.f3 Bg5 16.fe4 Be3 17.Kh1 cd4=+) 14...Nd2 15.Qd2 Rfd8 16.Qc2 (16.Bd3 dc4 17.Nc4 Bd5=) 16...Qb8 (16...Bd6 17.Qa4=) 17.Qb1 (17.Bd3 Bd6=) 17...Bd6 18.Bd3 (18.f4 cd4 19.Bd4 dc4 20.Nc4 Be4=) 18...h6 (18...cd4 19.ed4 a5 20.Rc2=+) 19.a4 (19.f4 dc4 20.Nc4 Nd5=) 19...Ba8 (19...cd4 20.ed4 a5 21.Rf2=+) 20.Rfd1 (20.f4 dc4 21.Nc4 Be7+=) 20...Nd7 (20...cd4 21.ed4 dc4 22.Bc4=) 21.f4= Ne5 (21...cd4 22.Nd7 Rd7 23.Bd4=) 22.fe5 Bc7 (22...Be7 23.Bh7 Kh8 24.Rf1=+) 23.Rf1 (23.Bh7 Kh8 24.Rf1 cd4 25.ed4 f5 26.ef6 Bh2 27.Kh1 gf6 28.Rf6 Bf4+=) 23...Rf8 (23...dc4 24.Bh7 Kh8 25.Rf7+= (worse 25.Rc4 cd4 26.Rf7 de3–/+)) 24.Qc2 (24.Bh7 Kh8 25.Qd3 g6 26.Bg6 A) 26...fg6 27.Qg6 dc4 28.Qh6 Kg8 29.Qe6 Kh7 30.Rf7 (30.Qc4?! Qb7 31.Qc2 Kg7+–) 30...Rf7 31.Qf7 Kh8 32.dc5+– (32.Qc4?! Qb7 33.Qe2 Qe4+–); B) 26...dc4=) 24...Bd8 (24...dc4 25.Bc4 (worse 25.Qc4 cd4 26.Qd4 Rcd8=+) 25...Bd5 26.Bd5 ed5 27.Qf5+=) 25.Qe2 (25.Ba3 dc4 26.Bc4 Bg5+=) 25...Qb7 (25...Bg5 26.Ba3+=) 26.cd5 Qd5 27.Bc4 (27.e4 Qd7+=) 27...Qd7 28.Rcd1 (28.Rfd1 Qe7+=) 28...Qe7 (28...Qc7 29.Ba3+=) 29.Ba3 Qc7 30.Bb3 (30.Qd3 Be7+=) 30...Be7 31.Rc1 (31.Bc2 Bd5+=) 31...Qd7 (31...Bd5 32.Bd5 ed5 33.a5+=) 32.Rfd1 (32.a5+=) 32...Rfd8 (32...Bd5 33.dc5 bc5 34.e4+–) 33.e4 (33.dc5 Qc7 34.cb6+–) 33...cd4= 34.Be7 (34.Rc8 Rc8 35.Be7 Qe7 36.Rd4=+) 34...Qe7 (34...Rc1!? 35.Bd8 d3–/+) 35.Rc8= Rc8 36.Rd4 Qc5 (36...Rc1 37.Rd1 Rd1 38.Bd1 Qc5 39.Kh1 Qe5–+) 37.Qd3?? (better 37.Qc4=) 37…Rd8–+ (37...Rd8 38.Bd5 ed5–+ (38...Bd5?! 39.Qe3–+)) 0–1. Liepert,Luise – Marian,Renate, BL2 South, 2001.

10.Qc2 Ndf6 11.Nbd2 cd4 12.Ne4 Ne4 13.Bd4+=.

10.Qc2 Ndf6 11.cd5 ed5 12.dc5 Qc5 13.Qc5 Bc5+=.

10.cd5 ed5 11.dc5 Qc5 +–.

8.0–0 Ne4

9.Qc2 a6=.

9.Qc2 b6 10.Ng5 (10.Nc3 Bb7=) 10...Bb7 11.Bd3 (better 11.cd5 ed5 12.f4=+) 11...Ne4 (better 11...h6 12.Nf3 dc4 13.Bc4 Nd5=+) 12.Ne4+– de4 13.Be4 Be4 14.Qe4 Bf6 15.Nc3 Ne5 16.Na4 Nd7 17.d4 (17.Rab1 Bb2 18.Rb2 Nf6+–) 17...cd4 18.ed4 (18.Bd4 Qe7+=) 18...Qc7 (18...a6 19.Nc3 Qc7 20.Rab1+=) 19.Rac1 Rad8 (19...a6 20.Rfd1+=) 20.Ba3 (20.g3 Qd6+–) 20...Nf8 21.Rfd1 White prepares the advance d5 21...Ng6 22.g3 e5 (better 22...Qd7!? 23.Bb2 Ne7+–) 23.d5+– Bg5 24.Rc2 Re6?? (24...Qd7+–) 25.Qg4 Ree8 (25...Be7 26.de6 Ba3 27.ef7 Kf7 28.Rd8 Qd8 29.c5 Bc5 30.Nc5 bc5 31.Rc5+–) 26.Qg5 1–0. GuestFDDB – GuestWDBK, freechess.org, 2019.

9.Nc3 Bf6 10.Qb3 Nc3 11.dc3 Nb6= 12.Rfd1 (12.Nd2 a5=) 12...Qc7 (12...Nc4 13.Bc4 dc4 14.Qc4+=) 13.a4 (13.Nd2 a6=) 13...Nc4 14.Bc4 dc4 15.Qc4 b6 16.e4 (16.Qf4 Qf4 17.ef4 a6=) 16...Bb7 17.Bc1 Rfd8 18.Be3 Rd1 (18...g6 19.g4+=) 19.Rd1 Rd8 20.Rd2 (20.Rd8 Qd8 21.Nd2 h6+=) 20...Rd7 (20...h6 21.Rd8 Qd8 22.Nd2+=) 21.Kf1 (21.Ne1 Rd2 22.Bd2 Qd6+=) 21...Qc8 (21...Rd2 22.Bd2 Qd8 23.Qe2+=) 22.Rd7 (22.Rd3 Rd3 23.Qd3 c4+=) 22...Qd7 23.Ke2 a5?? (23...g6 24.h3+=) 24.Qd3 (better is 24.ba6!? Bc6 25.Qd3+/–) 24...Qd3 (24...Qc7 25.Bg5 Bg5 26.Ng5+=) 25.Kd3 h6 (25...Bd8 26.Bf4=) 26.Nd2 (26.Bf4 Be7+/–) 26...Bd8 (better is 26...Be5=) 27.Bf4+/– f5 (27...e5 28.Be5 Bc8 29.Nc4+/–) 28.f3 Kf7? (better is 28...fe4 29.fe4 e5 30.Be5 Bc8+/–) 29.Nc4+– fe4 30.fe4 Ba8? (30...e5 31.Nd6 Ke7 32.Be5 Bc7 33.Nf5 Kd7 34.Bc7 Kc7+–) 31.Bb8 Kf6 (31...Ke8 32.Ba7+–) 32.Ba7 Kg5 (32...Bc7+–) 33.Bb6 Be7 (33...Bb6 34.Nb6 Bb7 35.Ke3+–) 34.Ba5 Kf4 (34...Bb7+–) 35.Bc7 (35.Bc7 e5 36.Be5 Kg5 37.a5+–) 1–0. Bulcourf,Carlos (2205) – Olivares,Daniel (2280), Acasusso op, 1991.

9.Nc3 Bf6 10.Qc2 Nc3 11.Bc3 Bc3 12.Qc3 b6+=.

9.Nc3 Bf6 10.Qc2 Nc3 11.Bc3 dc4 (11...Qe7 12.Rac1+=) 12.Bc4 Qe7 13.a4 Rd8 14.Rac1 b6 15.Qe4 (15.Bd3 Kh8+=) 15...Rb8= 16.Bd3 Nf8 17.Qf4 Bb7 18.Be4 Be4 19.Qe4 Rd5 20.Bf6 gf6 (20...Qf6!? 21.d4 Rbd8=) 21.d4 Rbd8 22.dc5 bc5 23.Qc4 f5 24.a5 Nd7 (24...e5 25.e4 fe4 26.Qe4=) 25.Rb1 Qd6 26.Qh4 f6 27.Rfc1 Rb8 28.Qg3 (28.Kh1!?+=) 28...Qg3= 29.hg3 Kf8 30.Kf1 Ke7 (30...Rd3 31.Rc2=) 31.Ke2 e5 32.Nd2 c4 33.Nc4 Rdb5 34.Rb5 Rb5 35.Rh1 Nf8 36.Kd3 Ke6 37.Kc3 a6 38.Rd1 Rd5 39.Rh1 e4 40.Rb1 Nd7 41.Rb7 Rd3 (41...Rd1 42.Ra7 Nc5 43.Ra8=+) 42.Kc2 h5 43.Ra7 Nc5 44.Nb6 (44.Rc7!? Kd5 45.Nb6 Kd6 46.Rh7=) 44...Ra3–/+ 45.Nc4 Ra2 46.Kc3 Rf2 (46...Kd5!?=+) 47.Kd4= Nb3 48.Kc3 Na5?? (better 48...Nc1=) 49.Ra6+– (49.Na5?! Rg2 50.Ra6 Kf7=) 49...Kf7 50.Ra5 (50.Na5?! Rg2 51.Ra7 Kg6=) 50...Rg2? (50...Ke6+–) 51.Nd6 (51.Rf5?! Kg6 52.Rf4 Rg3 53.Re4 f5+–) 51...Kg6 (51...Ke6 52.Nf5 Rf2 53.Nd4 Kf7 54.Rh5+–) 52.Nf5 Rf2 53.Nh4 Kh6 54.Kd4 1–0. Sieber,Martin – Kolar,Stanislav (2155), Orlova op, 2005.

9.d3 Nd6 10.Nc3 dc4 11.dc4 b6 12.Qd3 Bb7 13.Rad1 Qc7 14.Ng5 Bg5 15.Qd6 Qd6 16.Rd6 Rfd8 17.Rfd1 Nf8 18.f4 Rd6 19.Rd6 Be7 20.Rd1 Rd8 21.Rd8 Bd8 22.Bd3 f5 23.e4 g6 24.ef5 gf5 25.Nb1 Kf7 26.Kf2 Bf6 ½–½. pcmvr – MMT, playchess.de, 2005.

9.d3 Bf6 10.Qb3 dc4 11.dc4 Bb2 12.Qb2 Qf6 13.Qf6 Ndf6+=.

9.d3 Bf6 10.Qc2 Nd6 (10...Bb2 11.Qb2 Qf6 12.Qf6 Nef6 13.Nc3 Rd8 14.cd5 Nd5 15.Rfc1) 11.Nbd2 (11.cd5 ed5 (11...Bb2 12.Qb2 ed5 13.Rc1 Re8 14.d4 c4 15.Nc3) 12.Nc3 Nb6 13.Nd1 c4 14.Nc3 Bf5 15.a4; 11.Nc3 Nb6 12.Nd1 (12.a4 dc4 13.Rfd1 Qc7 14.a5 cd3 15.Bd3; 12.Nd2 Re8 13.a4 a5 14.Nb3 Qc7 15.cd5) 12...Nd7 13.Rc1 Re8 14.d4 dc4 15.dc5; 11.Bf6 Qf6 12.cd5 (12.Na3 a6 13.ba6 Ra6 14.Nb5 Nb5 15.cb5) 12...ed5 13.Nc3 Nb6 14.a4 Be6 15.a5) 11...dc4 (11...Bb2 12.Qb2 a6 13.a4= (13.ba6 ba6 14.Rab1 Bb7 15.cd5) 13...b6 14.ba6 Ba6 15.Rfb1; 11...b6 12.d4 (12.a4 Bb7 13.cd5 Bd5 14.e4 Bb2 15.Qb2; 12.Rfd1 a6 13.a4 Bb7 14.ba6 Ba6 15.Rdb1) 12...a6 13.e4 cd4 14.cd5 d3 15.Bf6; 11...a6 12.ba6 (12.Bf6 Qf6 13.ba6 b5 14.cb5 Nb5 15.Rfc1; 12.a4 Bb2 13.Qb2 b6 14.Rfb1 Bb7 15.cd5) 12...b6 13.Rab1 Ba6 14.Rfd1 Bb7 15.Bf6) 12.dc4 (12.Bf6 Nf6 13.dc4 Qe7 14.Ne5 a6 15.Bd3) 12...Re8 (12...Bb2 13.Qb2 Qe7 14.Ne5 Rd8 15.Rfd1) 13.e4 (13.Bf6 Qf6 14.Bd3 h6+= (14...g6 15.Ne4) 15.Rfd1) 13...Bb2= 14.Qb2 e5 15.Rfd1 Qe7 16.a4 f5 (16...Nf6 17.Qc2=) 17.Bd3 f4 18.a5 g5 (18...Rd8 19.Ra3+=) 19.h3 h5 20.Nh2 Nf6 21.f3 (21.Qa3 Qc7+=) 21...g4= 22.hg4 hg4 23.Ng4 (23.Qa3 Qc7=) 23...Bg4 24.fg4 Ng4 25.Nf3 (25.a6 Ne3 26.Rdc1 Qg5=) 25...Ne3 (25...Qh7 26.Qa3 Rac8 27.Qa4–/+) 26.Rd2 Qg7 (26...Nec4? 27.Bc4 Nc4 28.Qa2+–; 26...Ndc4? 27.Bc4 Kg7 28.Rc1+–) 27.Qc1 Re6 28.Raa2? Rg6 29.Qc3 Re8–/+ 30.Qa3 Rc8 31.Qc3 Nf7 32.Bf1 Rg3–+ 33.Kf2?? Rg2 34.Ke1 Qg3 35.Rf2 Rd8 36.Rad2?? Rd2 37.Qd2 Rf2 38.Qf2 Qf2 39.Kf2 Nf1 40.Kf1 Kg7 41.Ke2 Kf6 42.Nh4 Nd6 43.Kd3 Nf7 44.Nf5?? a6 45.Nh4 Nd6 ½–½. Ebert,Lutz – Fechner,Henrik, Mecklenburg, 1995. (=1.Nf3 Nf6 2.b4 d5 3.Bb2 e6 4.b5 c5 5.e3 Nbd7 6.c4 Be7 7.Be2 0–0 8.0–0 Ne4)

9.d3 Bf6 10.Bf6 Qf6 11.Nbd2 Nc3=+ 12.Qe1 a6 13.ba6 Ra6 14.a3 (14.d4 cd4 15.ed4 Qf5= (15...Na2? 16.cd5 b5 17.Bb5+–)) 14...b6 (14...dc4 15.dc4 Rd6 16.Nb3=+) 15.d4 Bb7 16.cd5 Ne2 (16...ed5 17.Ba6 Ba6 18.a4=+) 17.Qe2 ed5 18.Qb5 (18.dc5 bc5 19.Qb5 Qc6=) 18...Qc6 19.Qc6 (19.Qb2 Rc8=) 19...Bc6=+ 20.Rfc1 (20.dc5 bc5 21.Rfb1 Rc8=) 20...Rfa8 Attacks the isolani on a3 (20...c4 21.Nh4=+) 21.Rc3 (21.dc5 bc5 22.Rc3 Kf8=) 21...f6 (21...c4 22.Ne1=+) 22.h3 (22.dc5 bc5 23.Kf1 Kf7=+) 22...Kf7 (22...c4 23.Ne1=+) 23.Ne1 (23.dc5 bc5 24.Kf1 Ke6=+) 23...Ke6 24.Nd3 (24.dc5 bc5 25.Nd3 Kd6=+) 24...Kd6 25.Kf1 Bb5 (25...c4 26.Ne1 b5–+) 26.Ke1 (better 26.Ke2!?=+) 26...Bd3–+ 27.Rd3 c4 28.Rc3 b5 29.Nb1 (29.Rb1!?–/+) 29...b4!–+ 30.Rc1 (30.ab4 A pinning theme 30...Ra1) 30...Nb6 (30...ba3?! 31.Ra2–/+) 31.Kd2 (31.Ra2 Nc8–+ (31...ba3?! 32.Rc3=+)) 31...b3 (31...f5 32.g4–+) 32.Re1 Na4 33.f3 (33.e4 de4 34.Re4 Kd5–+) 33...f5 (33...Rc6 34.Nc3 Rb6 35.Nd1–+) 34.e4 (better 34.g4 Rc6 35.Nc3–+) 34...de4 35.fe4 fe4 36.Re4 b2 37.Ra2 Rf8 38.Re1 Rf2 39.Re2 (39.Ke3 Rg2 40.Kf3–+) 39...Re2 (better 39...c3 40.Nc3 Re2 41.Ne2–+) 40.Ke2 Kd5 (40...Kd5 41.Kd2 Kd4–+) 0–1. Plock,Joerg – Maniocha,Andrzej (2240), Ueckermunde Tierpark op 2nd, 1998.

9.d3 Bf6 10.Bf6 Qf6 11.d4 a6=.

9.d4 a6 10.ba6 ba6 11.Nbd2=.

9.d4 Ndf6 10.Nbd2 dc4 (10...cd4 11.Bd4 Nd6 12.Rc1+=) 11.Ne4+= Ne4 12.Bc4 Nd6 (12...Qc7 13.Rc1+=) 13.Be2+/– cd4 14.Bd4 (14.Qd4 f6+/–) 14...Nf5 (14...Bd7 15.Qb3+=) 15.Rc1 (15.Bc3!?+/–) 15...Nd4= 16.Qd4 Bf6 (16...Qd4 17.Nd4 e5 18.Nf3=) 17.Qb4 (17.Qe4 Qa5+=) 17...Qe7 (better is 17...Bd7+=) 18.Nd2?? (18.Qe4+=) 18...b6 (better is 18...Qb4 19.Rfd1 Rd8–+) 19.Qe7+/– Be7 20.Bf3 Rb8 21.Rc7 Bb4 22.Nb3 (22.Nc4 Rd8 23.Ra7 f6+/–) 22...e5 (22...a6 23.Rc8 Rbc8 24.ba6+=) 23.Bd5 (23.Ra7!? Rd8 24.Rc1+/–) 23...a5+= 24.a4 Bf5 25.e4 Bg6 26.f3 Bd6 ½–½. Larsen,Andreas – Mathisen,Paal S, Tromsoe op NOR, 1998.

8.0–0 Re8

9.a4 a6 10.Nc3 Bf8 ½–½. Preusse,Goetz – Meier,Klaus, DDR–ch MG10 corr, 1990.

9.Nc3 b6 10.Qc2 (10.d4 Bb7=) 10...Bb7 11.cd5 (11.d4 Rc8=) 11...ed5 12.d4 (12.Qf5 Bd6=) 12...Bd6 13.Rfe1 Rc8 14.Rad1 (14.Rac1 Qe7=) 14...Qc7 (14...c4 15.Rc1=) 15.g3 (15.Qf5 Nf8=) 15...cd4 (15...c4 16.Qf5+=) 16.Rd4= (16.Nd4 Bb4 17.Rc1 Ne4 18.Ne4 Qc2 19.Rc2 de4+=) 16...Ne4 (16...Nc5 17.Rc1=) 17.Rc1 Ndf6 18.Qb3 The pressure on the isolated pawn grows (18.Qa4 A) worse is 18...Nc3 19.Rc3 Bc5 20.Rc2= (20.Qa7?? Ra8 21.Qa4 Ra4 22.Ra4 Ne4–+); B) 18...Qd7=) 18...Nc3 (18...Qe7 19.Re1+=) 19.Qc3 (19.Rc3 Qe7=) 19...Qc3 (19...Qd7 20.Qe1=) 20.Rc3 (20.Bc3? Ba3 21.Rc2 Ne4 22.Re4 de4–+ (22...Re4?! 23.Bd3–/+)) 20...Rc3 21.Bc3 Rc8 22.Be1 (22.Bb2 Ne4 23.Bd3 f6+=) 22...Bc5 (22...Rc2!? 23.Rd2 Rd2 24.Bd2 Ne4+=) 23.Ra4+= Ra8 24.Bb4 (24.Bd3 Ne4+=) 24...Ne4 (24...Bb4 25.Rb4 Ne4 26.Nd4+=) 25.Ne5 (25.Nd4 Bb4 26.Rb4 Nc3+=) ½–½. Larsen,Andreas – Schmitz,Norbert, NOR–ch M3 Norway, 1997.

9.Nc3 dc4 10.Bc4 Bd6 11.d4=.

9.d4 dc4 10.Bc4 b6 11.dc5 (11.Nbd2 Bb7=) 11...Bc5 (11...Nc5 12.Qc2=) 12.Nbd2 Bb7 13.Nb3 (13.Rc1 Rc8=) 13...Bf8 (13...Ne4 14.Nfd4 Nd6 15.Bd3 Bd4 16.Nd4=+) 14.Be2 (14.Rc1 Ne4+=) 14...Rc8= 15.Rc1 Qe7 (15...Rc1 16.Nc1 Qb8 17.Nb3=+) 16.Rc8 (16.Nfd4 Ne5+=) 16...Rc8 17.Qd4 (17.Qb1 Qb4=) 17...Bd5 18.h3 (18.Rd1 Qb4=) 18...Qb4 (18...Rc2 19.Bd1 Rc4 20.Qd3=+) 19.Qb4= Bb4 20.Rc1 (20.Bd3 Ne8=) 20...Rc1=+ 21.Bc1 (21.Nc1 Ne4=+) 21...Ne4 22.Bb2 (22.a3 Bc3 23.Nbd4 Kf8=+) 22...Bc3–/+ 23.Ba3 Bf6 (23...e5 24.Be7–/+) 24.Bb4=+ Ndc5 25.Nbd4 Ba2 (25...Kf8 26.a3=+) 26.Nc6 Nc3 (26...Bc3 27.Bc3 Nc3 28.Bf1=+) 27.Bf1= Nd5 (27...N5e4 28.Na7 Bb3 29.Bd3=) 28.Be1 (28.Bc5 bc5 29.e4 Nb4 30.Na7 Bd8+=) 28...Ne7 (28...Kf8 29.Na7 Ke7 30.Nc6 Kd6 31.g4=+) 29.Na7= Bd5 (29...Nd5 30.Nc6=) 30.Bb4 Kf8 (30...Nb3 31.Bd6=) 31.Nd2 Ke8 32.Nc4 (32.Bc5 bc5 33.e4 Ba8=) 32...Bc4 33.Bc4 Kd7 34.Bc5 bc5 35.b6 Be5 (35...Bc3 36.Kf1=) 36.Bb5 (better 36.Kf1+=) 36...Kd6?? (better 36...Kd8=) 37.f4+– Bc3 38.e4 e5 (38...c4 39.Nc8!! Nc8 40.e5 Kc5+–) 39.Be8 Ba5 40.Nb5 (40.Nb5 Ke6 41.b7 Bc7 42.Nc7 Kf6 43.b8Q ef4 44.Qb2 Kg5 45.Qe5 Kg6 46.Ne6 Nf5 47.Qf5 Kh6 48.Qg5) 1–0. Portnoy,Yuriy (1935) – Parshakov,Vladimir (2075), Uliyanovsk Championship, 2008.

8.d4 dc4

9.Bc4 a6=.

9.Nbd2 Qa5 10.Bc4 Nb6 11.Bf1+=.

9.Nbd2 a6 10.Bc4 ab5 11.Bb5=.

9.Nbd2 Nb6 10.Nc4 Nc4 11.Bc4 b6 (11...cd4 12.Qd4 Qa5 13.Bc3=) 12.0–0 cd4 (12...a6=) 13.ed4 (13.Nd4!? Bb7 14.Qe2+=) 13...Bb7+= 14.Qb3 (14.Qe2 Rc8 15.Rfc1 Be4=) 14...Nd5 (14...a6 15.ba6 Ba6 16.Rfc1+=) 15.Rac1 (15.Ne5 Rc8=) 15...f6 (15...Qd6 16.Rfe1=) 16.Rfe1= Qd7 17.Re2 (17.Ba3 Ba3 18.Qa3 Nc7=) 17...Rfe8 (17...Bd6 18.Ba3=) 18.Rce1 (18.Ba3 Ba3 19.Qa3 Nf4=) 18...Bf8 19.Bc1 Rac8 20.Bd2 Bd6 21.a4 (21.Qd3 Re7=) 21...Re7 22.Qd3 Rce8 (22...g5 23.h3=) 23.Bb3 Nf4? (better is 23...Kh8!?=) 24.Bf4+/– Bf4 25.Qf5 Bh6? (better is 25...Qd6 26.Re6 Re6 27.Re6 Re6 28.Qe6 Qe6 29.Be6 Kf8+/–) 26.Re6+– Kf8 (26...Re6 27.Be6 Re6 28.Qe6 Qe6 29.Re6 Kf7+–) 27.Rf6! gf6 (27...gf6 28.Qf6 Mate attack) 28.Qf6 Rf7 29.Qh8 1–0. Holz auf der Heide – Raitza, corr DDR–H–131, 1972.

9.Nbd2 c3 10.Bc3= Nd5 11.Bb2 a6 12.0–0=.

9.Nbd2 c3 10.Bc3 Nd5 11.Bb2 b6.

9.Nbd2 c3 10.Bc3= Nd5 11.Bb2 cd4 12.Bd4 Bf6 13.Nb3 (13.Ne4 Bd4 14.Qd4 Qa5 15.Qd2 Qa4=) 13...Nc3 (13...e5 14.Bb2 e4 15.Bf6 N7f6 16.Nfd4+=) 14.Qd3 (14.Bf6 Qf6 15.Qd4 Rd8=) 14...Ne2 15.Qe2 e5 16.Bb2 e4 17.Nfd4 (17.Bf6 Qf6 (worse is 17...ef3 18.Bd8 fe2 19.Bc7+/–) 18.Nfd4 a6=) 17...Ne5 18.0–0 Bg4 19.Qc2 (19.f3!? ef3 20.gf3+=) 19...Nd3–/+ 20.Ba3 Rc8 (20...Qc8 21.Bc5–/+) 21.Qd2+= Re8 22.Bb4 (22.f3 Be6 23.Ne6 Re6–/+) 22...Qc7 (22...Rc4 23.Bc3–/+) 23.a4 (23.f3 Bh5 24.fe4 Nb4 25.Qb4 Be5+=) 23...Be5 (better is 23...Qc4 24.Bd6 Qd5–/+) 24.g3? (better is 24.h3!? Bh5 25.f4–/+) 24...Qc4–+ 25.Ba3 b6 (25...Red8 26.a5–+) 26.Bb2 Red8 27.a5 Nc5 28.Nc1 Bd4 29.Bd4 (29.ed4 Qb5 30.Rb1 Ne6–+) 29...Ne6 (29...Qb5 30.ab6 ab6 31.Ra7–+) 30.ab6 (30.Qb2 Ng5 31.Nb3 Nh3 32.Kg2 Bf3 33.Kh3 Qe6 34.Kh4 Qg4) 30...ab6 31.Qa2 (31.Qb2 Nd4 (31...Rd4?! 32.ed4 Nd4 33.f4–+) 32.ed4 Rd4–+) 31...Nd4 32.ed4 Qd4 33.Ne2 (33.Qb1 Qf6 34.Nb3 Qf3–+) 33...Qd3 34.Nf4 Qb5 35.Qa7 (35.Rfb1 Qc6–+) 35...Qc5 36.Ng2 (36.Qb7 Qc6 37.Qc6 Rc6–+) 36...Rd7 37.Qa4 Rd4 38.Qa7 b5 39.h4 (39.Ne3 Be6–+) 39...Qa7 40.Ra7 Rd7 41.Rd7 Bd7 42.Rb1 f5 43.Nf4 Kf7 44.Nd5 Rb8 (44...Rc5 45.Rd1–+) 45.Kf1 Be6 46.Nb4 Bc4 47.Ke1 Ra8 48.Rb2 Kf6 49.Kd2 f4 (49...f4 50.gf4 Kf5–+) 0–1. Kidrin,GP – Johansson,Ingemar, corr ICCF WT–M–GT–22, 1991.

9.Nbd2 c3 10.Bc3= Nd5 11.Bb2 N7f6 12.Ne5 (12.0–0 a6+=) 12...a6 (12...cd4 13.Bd4 Bb4 14.Qc2=) 13.a4 (13.ba6 b6+=) 13...Nb4 (13...ab5 14.ab5 Ra1 15.Ba1 cd4 16.Bd4=) 14.0–0 (14.dc5 Bc5 15.0–0 Qe7=). Rudenko – Sazonov, Minsk, 1962.

7.Be2 Ne4

8.0–0 a6 9.d3 Bf6 10.Qc2 (10.de4? Bb2 11.Nbd2 Ba1 12.Qa1 ab5 13.cd5 Qa5–+) 10...Bb2 11.Qb2=.

8.0–0 Nd7=.

8.Qc2 Bf6 9.Nc3 Nc3 10.Bc3 (10.dc3 a6=) 10...Nd7 (better 10...d4!? 11.Bb2 d3 12.Bd3 Bb2 13.Bh7 Kh8 14.Qb2 Kh7=+) 11.0–0= Nb6 (11...Re8!?=) 12.Bf6+– Qf6 13.cd5 ed5 14.Qc5 Re8 15.a4 Be6 16.Nd4 Rac8 17.Qb4 Rc7 18.a5 Nc4 19.b6 ab6 20.ab6 (20.Ne6?! Qe6 21.ab6 Qb6 22.Qb6 Nb6+=) 20...Rcc8 21.d3 Ne5 22.Nb5 (22.Ra7 Re7+–) 22...Nc6 (22...Rc2!? 23.Nd6 Rb8+=) 23.Qd2 Rb8 24.Nc7 Red8 25.Ra4 Ne7 26.Bf3 Bd7 27.Rf4 (27.Rb4 Bf5+–) 27...Qb6 28.Nd5 Nd5 29.Bd5 Be6 30.Rb4 Qa6 31.Be6 Qe6 32.Rfb1 Qc6 33.d4 Rd7 34.Qc1 Qc1 35.Rc1 Kf8 36.Kf1 Ke7 37.Ke2 Ke6 38.Rb6 Ke7 39.Kd3 Rd6 40.Rc7 Rd7 41.Rc5 g6 (41...Ra8 42.Re5 Kd8 43.Reb5 Ra3 44.Ke4+–) 42.d5 f5 43.Kd4 Kd8 44.d6 Ra8 45.Ke5 Rc8 (45...Ra2 46.Rcb5 Kc8 47.Rb2 Ra5 48.Ke6+–) 46.Rc8 Kc8 47.Ke6 (47.Rb2 Rd8+–) 47...Rd8 48.Rb2 Rd7?? (48...Re8 49.Kd5 Re4+–) 49.Ra2 Rd6 50.Kd6 (50.Kd6 Kb8 51.f3+–) 1–0. Didicher,Dietmar (1650) – Pomeranets,Igor, Frankfurt–ch, 2005.

8.Nc3 Nd7+=.

8.d3 Qa5 9.Nbd2 Nc3 10.Bc3 Qc3 11.0–0 Bf6 (11...Qf6 12.Qc2=) 12.Rc1+= Qa3 13.Qb3 Qb2? (13...Qb3 14.Nb3 b6 15.d4 dc4 16.Bc4 cd4 17.Nbd4=) 14.Qb2 (14.cd5 Qb3 15.Nb3 b6+–) 14...Bb2 15.Rc2 Bf6 (15...dc4 16.Rb2 c3+–) 16.a4 (16.cd5 a6+–) 16...a6 (better 16...Nd7!?+=) 17.cd5+– ed5 (17...ab5 18.ab5 Be7 19.d4 ed5 20.dc5+–) 18.Rc5 Nd7 19.Rd5 (19.Rc2!?+–) 19...Nb6 20.Rc5 (20.Rd6 Na4 21.ba6 Nc3+–) 20...Na4+= 21.Rc2 ab5 22.Ne4 Be7 23.Rfc1 Ba3 24.Rb1 Bd7 (24...b4 25.Nd4+=) 25.Nd4 (25.Ne5 Be8+–) 25...b4 26.Rc7 Bc6 27.Nc6 bc6 28.Rc6 Rfc8 29.Rc8 Rc8 30.g3 (30.Bg4 Rd8+=) 30...f5 (30...Nc3 31.Bg4 Rc7 32.Rb3 Ne4 33.de4=) 31.Nd6+= Rc5? (better 31...Rd8 32.Nf5 Nc3+=) 32.d4+– Rc1 33.Rc1 Bc1 34.Nf5 Nc3 (34...Kf8 35.Bc4+–) 35.Bc4 Kf8 36.Nd6 Nb1 37.Ne4 h6 38.Kf1 Nd2 39.Nd2 Bd2 40.Ke2 Bc3 41.Kd3 (41.f4 h5+–) 41...Be1 42.f4 Ke7 (42...Bf2 43.g4+–) 43.e4 h5 (43...Bf2 44.e5+–) 44.e5 h4 45.gh4 Bh4 (45...Bf2 46.d5 Bc5 47.Bb3+–) 46.Ke4 (46.d5 Ke8+–) 46...Bf2 47.d5 g6 (47...Bc5+–) 48.d6 Kd7 49.Kd5 Be3 (49...Bh4+–) 50.e6 (50.Bb5 Kd8 51.e6 Kc8 52.e7 Kb8 53.e8Q Ka7 54.Qd7 Kb6 55.Bf1 Bf4 56.Qc7) 50...Kd8 (50...Ke8 51.e7 Bc5 52.Ke6 Bd6 53.Bb5) 51.e7 Ke8 (51...Kd7 52.Bb5 Kc8 53.e8Q Kb7 54.Qc6 Ka7 55.Qc7 Ka8 56.Bc6) 52.Ke6 Bf4 53.Bb5 (53.d7) 1–0. tsodikovich (1780) – handoko (1890), gameknot.com, 2018.

8.d4 Qa5 9.Nbd2 cd4 10.Bd4 (10.Nd4?? Nd2 11.Qd2 Bb4–+) 10...Bb4 (10...dc4 11.Bc4 Nd6 12.Bc5=+) 11.h3 (11.Qc2 Nd2 12.Nd2 dc4 13.Bc4 Bd7+=) 11...Nd2 (11...Nc3 12.Bc3 Bc3 13.Rc1=+) 12.Nd2 dc4 13.Bc4 Rd8 14.a3 Bd2 (14...Ba3 15.Qb3 a6 16.Qa3 Qa3 17.Ra3 f6+–) 15.Qd2–/+ Qd2 16.Kd2 e5 17.Ke2 (17.Kc3 ed4 18.ed4 a6–/+) 17...ed4–+ 18.Rhd1 Be6 19.Rac1 (19.Be6 fe6 20.Rd4 Rd4 21.ed4–+) 19...d3 (19...a6!?–+) 20.Bd3–/+ Nd7 21.Rc7 (21.Be4 Bb3 22.Rd4 Rab8–/+) 21...Ne5 22.Rb7?? (better is 22.Be4 Bc4 23.Ke1 Rd1 24.Kd1 Bb5 25.Rb7 Rd8 26.Kc1–+) 22…Nd3 (23.Rd3 Bc4–+) 0–1. Madel,K (1790) – Mezera,Lukas (1795), Plzen KB op–B U18, 1997.

8.0–0 Bf6

9.Qc2 a6 10.Nc3 Nc3 11.Bc3 Bc3 12.Qc3 ab5 13.cd5 Qd5 14.Bb5=.

9.Qc2 Bb2 10.Qb2 dc4 11.Bc4 (11.Qe5 Qf6+=) 11...Nd6 (11...b6 12.Nc3 Nd6 13.Be2=) 12.d3 (12.Be2 Nd7=) 12...Nd7 13.Nbd2 b6 14.a4 Bb7 15.Qc3 White prepares the advance a5 (15.e4 Qc7=) 15...Qe7 (15...Qf6 16.Rfc1=) 16.a5 Rae8 (16...Qf6 17.Rfc1=) 17.ab6 (17.Rfd1 h6=) 17...ab6= 18.Ra7 (18.e4 Ra8=) 18...e5 (18...Ra8 19.Rfa1=) 19.e4 Nf6 (19...Ra8 20.Rfa1=) 20.Re1 (20.Qb2 Nc8 21.Ra4 Nd6+=) 20...Nc8 (20...Nd7 21.Rea1=) 21.Raa1+= Qd6 (21...Nd6 22.Qb2+=) 22.Nf1 (22.Bb3 Nd7+–) 22...h6 (22...Qe7 23.Ne3+–) 23.Ne3 g6 (23...Qc7 24.Qb2+–) 24.Qb3 (24.h4 h5+–) 24...Re7 25.Nh4 (25.Qb2 Kg7+–) 25...Kh7+= 26.Nhf5 (better 26.Qd1+=) 26...gf5=+ 27.Nf5 Qd7 28.Ne7 Qe7 (worse 28...Ne7 29.Bf7 Nf5 30.Be6+=) 29.Re3 (29.f3 Nd6–/+) 29...Nh5 (29...Nd6 30.Ra7–/+) 30.Rae1 (30.g3 Nd6–/+) 30...Nf4 31.Qb1 (31.g3 Qd7 32.Qb2–/+ (32.gf4? ef4 33.Rf3 Qg4 34.Rg3 fg3 35.fg3 Nd6–+)) 31...Nd6–+ 32.g3 (32.Qb3 Qg5 33.g3 f5–+) 32...Rg8 (32...f5 33.f3 (33.gf4?? ef4 34.Rh3 Qg5 35.Kh1 Nc4–+) 33...Nh3 34.Kg2–+) 33.Kh1 (33.Qb2 Qg5–+) 33...Ne6 34.Bd5 (34.Qb2 Nd4–+) 34...Nd4 35.f4 (35.Rf1 Bd5 36.ed5 N6f5–+ (36...N4b5?! 37.Rfe1–/+)) 35...Bd5 (35...N6f5!? 36.fe5 Ne3 37.Re3 Bd5 38.ed5–+) 36.ed5 Qb7 (better 36...Qd7!? 37.fe5 N6f5–+) 37.Re5–/+ Rg7 38.Kg1? (better 38.Qa2 f6 39.Rh5–/+) 38...f6–+ 39.R5e3 (39.Rh5 Qf7 40.Qd1 N6b5–+) 39...Qd5 40.Rf1 (40.Qd1 N6b5 41.Rf1 Nf5–+) 40…N6b5 0–1. Melich,Jindrich (2140) – Hlavaty,Jiri, Decin op–A, 1998.

9.Qc2 Nd7 10.d4 b6 11.Bd3 Bb7 12.cd5 ed5 13.Nc3 Re8 14.Rfd1 g6 (14...Rc8 15.Rac1=) 15.dc5 White gets in control 15...Ndc5 (15...bc5 16.Ne4 Bb2 17.Qb2 de4 18.Be4 Be4 19.Ne5 Re5 20.Rd7 Qd7 21.Qe5–+) 16.Be4+/– Ne4 17.Ne4 Bb2 (17...Re4 18.Bf6 Qf6 19.Nd2+=) 18.Qb2 Re4 19.Nd4 Qf6 20.Rac1 Re7 21.Qb3 Qg5 (21...a6 22.ba6 Ra6 23.a4+/–) 22.Nc6 Rd7 23.Rc3 Bc6 (23...a6 24.ba6 Ra6 25.Nd4+/–) 24.bc6 Rc7 (24...Rd6!?+/–) 25.Qd5+– Qd5 (25...Qf6 26.Qd6 Qc3 27.Qc7+–) 26.Rd5 Rac8 27.Rd6 Kf8 28.e4 Re8 29.f3 Re6 30.Re6 fe6 31.e5 b5 32.Kf2 b4 33.Rc4 a5 34.Ke3 a4 (34...g5 35.Ke4+–) 35.Kd4 a3 (35...Ke7 36.Rb4 Rc6 37.Ra4+–) 36.Kc5 b3 37.ab3 Ra7 38.Rc1 a2 39.Ra1 (39.Ra1 Kf7 40.b4+–) 1–0. Gappel,Ralph – Boebber,Joachim, corr DDR, 1990.

9.Qc2 Nd7 10.d4 Re8 11.Nc3 Nc3 12.Bc3 cd4 13.Nd4=.

9.Bf6 Qf6 10.Nc3 Nc3 11.dc3 Rd8+=.

7.e4? b6

8.Ke2? Bb7 9.d4 Nbd7 10.Nbd2 (better 10.e5 Ne4 11.Ke1–/+) 10...Ne5?? (10...de4 11.Ne5–+) 11.Rc1?? (11.Ne5 de4 12.Nb3 Qc7 13.dc5 bc5+–) 11...Rc8?? (11...Nf3 12.gf3 de4 13.Ne4 Ne4 14.fe4–/+) 12.Ne1?? (12.de5 Ne4 13.Ke1 Nd2 14.Qd2 d4+–) 12...Nc6?? (12...Nc4 13.Nc4 dc4 14.dc5 Rc5 15.Qd8 Rd8–+ (15...Bd8?! 16.Ba3 Rb5 17.Rc4–/+)) 13.Nd3?? (13.bc6 Bc6 14.cd5 ed5+–) 13...Nd7?? (better 13...de4 14.Nc5 bc5 15.bc6 Bc6–+) 14.cd5?? (14.bc6 Bc6 15.f3 de4 16.Ne4 cd4 17.Bd4 Qc7+–) 14...ed5?? (better 14...Nd4 15.Bd4 cd4 16.de6 fe6=+) 15.Nb1?? (15.bc6 Bc6 16.ed5 Bd5 17.Qa4+–) 15...Nde5?? (better 15...de4 16.Nc5 bc5 (worse 16...Bc5 17.dc5 Nce5 18.Be5 Ne5 19.Qd8 Rfd8 20.c6+–) 17.bc6 Rc6–+) 16.g3?? (16.de5 de4 17.bc6 Ba6+–) 16...Ra8 (better 16...Nd3 17.Qd3 de4–+) 17.Ke3?? (better 17.Ne5 Ne5 18.de5+–) 17...Bh4?? (better 17...cd4 18.Bd4 Nd4 19.Ne5 de4–+) 18.a4 (18.de5 Na5 19.gh4 Nc4 20.Ke2 de4 21.Nc5 Qd1 22.Rd1 bc5+–) 18...Qe7?? (18...cd4 19.Bd4 Bg5 20.f4 Nd4 21.Ne5 Ne6=) 19.Ne1?? (19.de5 d4 20.Kd2 Bg5 21.f4 Ne5 22.Ne5 Qe5+–) 19...Qc7?? (better 19...cd4 20.Bd4 Nc4 (20...Nd4?! 21.Qd4 Bf6 22.Ke2–+) 21.Ke2 Qe4 22.Be3 Ne3 23.fe3 Qh1 24.gh4 Qh2 25.Bg2 Na5–+) 20.Ng2 (better 20.bc6 Nc6 21.gh4 Nd4+–) 20...a5?? (20...Bg5 21.f4 Nd4 22.fg5 de4=) 21.Qd3 (better 21.bc6 Nc6 22.Nh4 de4 23.dc5 bc5 24.Qc2+–) 21...Rad8 (21...Nd3 22.Bd3 Nd4 23.Nh4 de4 24.Bc4–+) 22.Ne1?? (better 22.de5 d4 23.Kd2 Ne5 24.Qe2+–) 22...Na7 (better 22...Nd3 23.Nd3 Nd4 24.gh4–+) 23.Ng2?? (better 23.de5 de4 24.Qc2 Bg5 25.Ke2 Bc1 26.Qc1=) 23...Nc8 (better 23...Nd3 24.Bd3 de4 25.Nh4 ed3–+) 24.Qc3?? (better 24.de5 de4 25.Qc2 Bg5 26.Nf4+–) 24...g6?? (24...Bf6 25.Qb3 cd4 26.Ke2–+) 25.g4?? (better 25.Nh4!? Rfe8 26.Nd2 cd4 27.Qd4 Qb8+–) 25...Bf2?? (25...Ng4 26.Ke2 Nf2 (26...Bf2?! 27.dc5 d4 28.Qf3–/+) 27.Nh4 Nh1–+) 26.Kf2+– Rd6?? (better 26...Ng4 27.Kg1 Nf6+–) 27.Qe3 (better 27.de5!? Rd7 28.ed5 Bd5+–) 27...Re6 (better 27...Ng4 28.Ke2 Ne3 29.Ne3 Qe7–+) 28.Kg1 (better 28.de5 f6 29.ef6 Re4 30.Qb3+–) 28...f6?? (better 28...Ng4 29.Qf3 Nf6 30.dc5 de4+–) 29.Bc3 (29.Bc3 Ng4 30.Qd2+–; better 29.ed5 Bd5 30.de5 fe5 31.Nc3+–) 1–0. Bulcourf,Carlos (2225) – Justo,Damian (2250), Buenos Aires COOP tt, 1992.

8.Ke2? Bb7 9.d4 Ne4 10.Ke1 –+.

8.Ke2? Bb7 9.e5 Nfd7 –/+.

8.Ke2? Nbd7 9.d4? Bb7 10.Nbd2 (10.e5 Ne4 11.Ke1 dc4 12.Bc4 cd4 13.Bd4 Rc8–/+) 10...Rc8 (10...de4 11.Ne5–+) 11.Rc1? (11.e5 Ne4 12.Ke1 cd4 13.Bd4 dc4–/+) 11...cd4 (better is 11...de4!? 12.Ne5 cd4 13.Bd4 Ne5 14.Be5 Nd7–+) 12.e5–/+ d3 –/+. Bulcourf,Carlos (2295) – Conlazo Zavalia,E, Vicente Lopez, 1993.

8.Ke2? Nbd7 9.d4? Ne4 10.Nbd2 –+.

8.Ke2? Nbd7 9.e5 Ne8 –/+.

8.Ke2? de4 9.Ne5 –+.

8.e5!? Ne4 9.d3=.

8.e5 Ne4 9.h4 dc4 10.Bc4 +/–.

6.c4 a6

7.a4 ab5 8.cb5 b6 (8...0–0 9.Be2=+) 9.Bd3 Nbd7 10.0–0 (10.Bc2 0–0=) 10...0–0 (10...Bd6 11.Be2=+) 11.Bc2= c4 12.d3 cd3 13.Qd3 Nc5 14.Qe2 Bb7 15.Nbd2 (15.Rc1 Bd6=) 15…Re8. algernon (2400) – pops (2430), net–chess.com, 2003.

7.ba6 Na6 8.cd5 ed5 9.Bb5 Bd7 10.Bd7 Qd7 11.0–0 (11.Ne5 Qb5 12.Bc3 0–0=+) 11...0–0 12.d3. Johnson,Bryan – Woschkat,Karl_Heinz, compuserve, 1996.

7.a4 0–0

8.Nc3 ab5 9.ab5 Ra1 10.Ba1=.

8.Nc3 Nbd7 9.ba6 ba6 10.Be2 Rb8 11.Qc2 (11.Rb1 dc4 12.Bc4 Rb4=) 11...dc4=+ 12.Bc4 Bb7 13.0–0 (13.Rb1 Bf3 14.gf3 Qa5=+) 13...Bf3 14.gf3 Ne5 15.Be2 Nc6 16.Ne4 (16.Ba6? Nb4 17.Qc1 Na6–+) 16...Nd5 (16...Nb4 17.Qc3=+) 17.Kh1 (17.Rfc1 Qa5=) 17...Ncb4 (17...f5 18.Nc5 Rb2 19.Qb2 Bc5 20.Qc2+=) 18.Qc4 The isolani on a6 becomes a target 18...Qc7 (18...Nb6 19.Qb3=+) 19.Rg1= The mate threat is Rxg7 19...g6 20.Rac1 Increasing the pressure on the isolated pawn on c5 20...Rfc8 21.Ba1 Qa5 (21...Qd7 22.Bd1=+) 22.Be5 Rb6 23.Bd1 (23.Kg2 Qa4 24.d4 Rbc6=+) 23...Nc6 24.Ba1 (24.Bg3 Rb2=+) 24...Rb4 (24...f5 25.Nc5 Nb8 26.d4=) 25.Qa2 (25.Qe2 Rc7=) 25...Qb6 (25...f5 26.Ng3 f4 27.Ne4=) 26.Be2 (26.Nc3 Nf6=+) 26...Na5=+ 27.Rb1 Qb7 (27...Qc6 28.Rb4 cb4 29.Kg2=+) 28.Rb4 (28.Rgc1 Rc6=+) 28...cb4 (28...Nb4? 29.Qb2 f6 30.Nf6 Kf7 31.Nh7+–) 29.h4 (29.Qb1 Qc6=+) 29...b3–/+ (worse 29...Bh4 30.Qb2 f6 31.Rg4 Bf2 32.Nf2+–) 30.Qb2 Do you see the mate threat? 30...f6 31.h5 Kf7 (31...Rc2 32.Qb1=+) 32.Qb1 f5 (32...Qc6 33.d4=+) 33.Nc3 Nf6 34.hg6 hg6 35.Rg2 (better 35.Kg2!?=+) 35...Nc4–+ 36.Bc4 Rc4 37.e4 (better 37.f4!?–/+) 37...fe4–+ 38.Bb2 (38.fe4 Ne4 39.Kg1 Ng5–+) 38...Qd7 39.Ne4 Ne4 40.fe4 Rc2 (40...Qd2 41.f3 Qe3 42.Qd1–/+) 41.d4 (41.Be5 Qa4 42.Kh2 Rd2–+) 41...Qa4 42.f3 (42.Kh2 Qa5 43.f3 Rg2 44.Kg2 Qd2 45.Kg3 Bg5–+) 42...Rg2 (42...Qc4 43.Rc2 bc2 44.Qc1–+) 43.Kg2 a5 (43...Qc4 44.Kf2–+) 44.Qd3 White prepares d5 44...Bf6 45.e5 (45.Qc3 Qa2 46.Kg3 g5–+) 45...Qa2 46.Qc3 (46.Qd2 Be7 47.d5 Ba3 48.Qf4 Kg8 49.de6 Qb2 (49...Bb2?! 50.Qf7 Kh8 51.Qf6 Kh7 52.Qf7 Kh6 53.Qf8 Kh7 54.Qe7 Kh6 55.Qf8 Kh7 56.Qe7 Kh6 57.Qf8=) 50.Kg3 Qc1 51.Qf7 Kh8 52.Qf6 Kh7=) 46...Be7 47.d5 ed5 ½–½. Ringsborg,Allan (2260) – Bisgaard,Peter (2065), corr DEN–ch Denmark, 2000.

8.d3 dc4 9.Nc3 ab5 10.Nb5 Nc6=+.

8.d3 dc4 9.d4 ab5 10.ab5 Ra1 11.Ba1 Qa5 12.Bc3 (12.Nbd2 cd4 13.Bc4 de3 14.fe3 Ng4–/+) 12...Qb5–/+ 13.Nbd2 Qc6 14.Ne5 (14.Nc4 Ne4 15.Bb2 cd4 16.Qd4 f6–/+) 14...Qd5 15.Nec4 (15.dc5 Bc5 16.Nec4 Nbd7–/+) 15...b5 16.Ne5 (16.Nb6 Qf5 17.Nc8 Rc8 18.dc5 Qc5–+) 16...c4 17.Ndf3? (better is 17.Qb1 Qb7 18.Ba1–+) 17...Ne4–+ 18.Qc2 f6 (19.Nc4 bc4–+) 0–1. Zoltan – larlinde, mySchach.de, 2003.

7.a4 ab5

8.ab5 Ra1

9.Ba1 0–0 10.Be2 Nbd7 11.0–0 Qc7 12.d3 b6 13.Nbd2 (13.cd5 ed5 14.Qc2 Bd6=) 13...Bb7 14.Qb3 (14.Qc2 Ra8=) 14...Ra8=+ 15.Bc3 Ne8 (15...e5 16.Nh4=) 16.Ra1= Ra1 17.Ba1. Hatipoglu,Metin (1975) – Kuzko,Michael, DJ–CT18/pr54, 2011.

9.Ba1 b6 10.Qc2 Bb7 11.Ne5 (11.d4 Bd6=) 11...d4 12.ed4 (12.Bd3 Qd6 (12...Bg2 13.Rg1 Ba8 14.Rg7+–) 13.f4 g5= (worse 13...Bg2 14.Rg1+–)) 12...cd4=+ 13.Qa4 (13.Be2 Qd6 14.Nf3 e5=+) 13...0–0 14.Nc6 (14.Qa7 Be4 15.d3 Bb4 16.Kd1 Bf5=+) 14...Nc6 (14...Bc6 15.bc6 Qd6 16.c7–/+) 15.bc6 Ba8 16.Bd3 (16.c7!? Qd6 17.Qa6 Qe5 18.Kd1 Qc7 19.Bd4–/+) 16...Qd6–+ 17.0–0 Bc6 18.Qb3 Ra8 19.Bb2 Qf4 20.Qb6?? (better 20.Bc2–+) 20...Ng4 21.g3 Qf3 22.Qd8 (22.Qc6 Qc6 23.Be2–+) 22…Rd8 (22...Rd8 23.Bh7 Kh7 24.Bd4 Qg2) 0–1. GuestCTMC – Guestxxx, freechess.org, 2018.

9.Ba1 dc4 10.Bc4 0–0 11.0–0 b6 12.d3 (12.d4 Bb7=) 12...Nbd7 (12...Bb7 13.Nbd2=) 13.Nbd2 Qc7 14.Qb3 (14.Qc2 Bb7=) 14...Ne8 (14...Bb7 15.Bb2=) 15.Bb2 Bb7 16.Ra1 Bf6 17.e4 Ne5 18.Ra7 (18.Bc3 Nf3 19.Nf3 Qf4=) 18...Nf3 19.Nf3 (< 19.gf3 Qb8 20.Bf6 Qa7–/+) 19...Bb2 20.Qb2 Qb8 21.Qa2 (21.Qa1 Nd6 22.Ne5 Nc8=) 21...Nd6 22.Ne5? (better is 22.Ra4=) 22...Nc8–+ (22...Nc4?! 23.Nc4 Rd8 24.Nb2=+ (< 24.Nb6 Be4 25.Nd7 Qd6–/+)) 23.Rb7 Qb7 (23...Qe5?! 24.Qa8=) 24.h4 (24.Qa6 Qa6 25.ba6 Nd6–+) 24...Nd6 25.h5 Ra8 26.Qd2 (26.Qb2 Qa7–+) 26...Ra1 (26...Nc4 27.Nc4 Ra1 28.Kh2 Qb8 29.g3–+) 27.Kh2 Qc7 28.h6?? (28.Qf4–+) 28…Nc4 (29.Qf4 Qe5 30.Qe5 Ne5–+) 0–1. Leveille – Gertler, Philadelphia, 1979.

9.Ba1 dc4 10.Bc4 0–0 11.0–0 Nbd7 12.Qc2=.

9.Ba1 dc4 10.Bc4 Nbd7 11.0–0=.

9.Ba1 Bd7 10.d4 Qc7 11.dc5 dc4 12.Be5 Qa5 13.Qd2 Qb5 14.Nc3 Qc5 15.Bb8 0–0 (15...Qa3!? 16.Nd4 Qa1 17.Ke2 Qa5=+) 16.Be5+= Nd5 (better is 16...Ra8!?+=) 17.Bd4 Qb4 18.Ne5 (18.Be2 Nc3 19.Bc3 Qb1 20.Bd1 Bc6+/–) 18...Bc6 (18...Ba4!? 19.f3 Rd8+/–) 19.Nc4 Ra8 20.Bd3 Ra1 21.Nd1 Qd2 22.Nd2 Ra3 23.Ke2 b5 24.Nb2 b4 25.Nbc4 Nc3 26.Bc3 bc3? (26...Rc3 27.Nb1 Bg2+–) 27.Na3 cd2 28.Nc4 (28...Bg2 29.Ra1+–) 1–0. orane (2090) – cap71 (1935), Live Game Caissa's Web, 2004.

9.Ba1 Nbd7 10.d4 cd4 11.Nd4 (11.Bd4 Bb4 12.Bc3 Bc3 13.Nc3 Qa5=) 11...0–0=+ 12.Be2 Qc7 (12...e5 13.Nf3=+) 13.cd5= Nd5 14.0–0 N7f6 15.Nd2 Rd8 16.N2f3 (16.Qb1 Bb4 17.Nc4 Qe7=) 16...Ne4 (16...e5!? 17.Ne5 Qe5=+) 17.Qc1= Bd6 18.Qc7 Bc7 19.Bd3 (19.Rc1 Bd6+=) 19...Nef6 20.Rc1 e5 21.e4 ed4 (21...Nf4 22.Bf1 (worse 22.Rc7 Nd3 23.Nc2 Ne4–/+) 22...Bb6 23.Ne5 Ne4 24.Rc2=) 22.ed5 Bf4 23.Re1 Nd5 24.Nd4 Nc7 25.Re4 (25.Bc4 Kf8+=) 25...Bg5 (25...Bf5 26.Nf5 (worse 26.Rf4 Bd3 27.Rg4 Ra8–/+) 26...Rd3 27.g3 Rd1 28.Kg2 Ra1 29.gf4=) 26.Bf1 (26.f3 Bf6=) 26...h6 (26...Bf6!?=) 27.Nf3+= Rd1 28.Ng5 hg5 29.b6 Ne6 (29...Nd5 30.Re8 Kh7 31.Rc8 Ra1 32.g3=) 30.Ra4 (30.Bc3!?+=) 30...Bd7=+ 31.Ra5 Nf4 (31...f6 32.f3=+) 32.f3= Rb1 (32...Nh3 33.gh3 Bh3 34.Kf2 Rf1 35.Ke2=) 33.Kf2 Ne6? (33...Rb6 34.Rg5 f6 35.Ra5=) 34.Bd3 (better 34.Ra8 Nf8 35.Bd4+–) 34...Rb6= 35.Ra8 Nf8 36.Bd4 Re6 37.Bc4 (37.Rb8 Bc6+=) 37...Re8= 38.Re8 (38.Ra7 Bc6=) 38...Be8 39.Bc5 Bc6 40.Ke3 Nd7 41.Be7 ½–½. Ho,Men Wei – Temizkan,Denizcan, Wch U08 Vung Tau, 2008.

9.Ba1 Nbd7 10.Be2 Qc7 11.0–0 0–0 12.d3 b6 13.Nbd2 Bb7 14.Qc2 Ra8 15.Bb2 Bd6 16.h3 (16.cd5 Nd5 17.Ne4 e5=) 16...Qd8 (16...e5 17.cd5 Bd5 18.e4=) 17.Ra1 Ra1 18.Ba1 Bb8 (18...Qe7 19.Bb2=) 19.Bb2 h6 20.d4 (20.Qc3 Bd6=) 20...cd4 21.ed4 dc4 22.Nc4 Nd5 23.g3 Ne7 24.Qd1 Nf6 25.Nfe5 Be4 26.Ba3 Nf5 27.Bb2 Bc7 28.Qa1 (28.Nc6 Qa8=+) 28...Ne7 (28...Qe8 29.Qa6=+) 29.Qa7 Exerts pressure on the isolated pawn (29.Ba3 Qa8=) 29...Nfd5=+ 30.h4 (30.Qa3 f6 31.Ng4 Qd7=+) 30...Qe8 (30...Nc8 31.Qa1=+) 31.Qa4 Qb8 (31...Nf6 32.Ba3=+) 32.Nd2 Bf5 33.Kg2 (33.Bf3 f6 34.Nec4 Bg3 35.fg3 Qg3 36.Kh1 Qe1 37.Kh2 Ne3 38.Ne3 Qd2 39.Ng2 Qb2–+) 33...Nf6 (33...f6 34.Nec4=) 34.Nc6 Qe8 (34...Nc6 35.bc6 Qd8 36.Qb5=+) 35.Bf3 Ned5 36.Nc4 Bd3 (36...Be4 37.Qb3=) 37.N4e5 (37.Qb3 Be4=) 37...Be4 38.Qc4 (38.Qb3 Bf3 39.Qf3 Ne7=) 38...Bf3=+ 39.Kf3 (39.Nf3 Nh5 40.Bc1 Bd6=+) 39...Qa8 40.Qb3 Bd6 41.Nc4 Ne8 42.Kg2 Bf8 43.Ba3 Ba3 44.Na3 (44.Qa3 Qa3 45.Na3 Nd6=) 44...Nd6=+ 45.Nc4 Nf5 46.Qa3 Qa3 47.Na3 Nc3 48.Kf3 (48.h5 Nd6=) 48...g6 49.Kf4 f6 50.Kf3 (50.Kg4 h5 51.Kf3 Kf7=+) 50...Kf8 (50...Kf7 51.Kf4–/+) 51.Nc4 (51.Kf4 Ke8=+) 51...Nb5 52.Nb6 Nfd4 53.Nd4 Nd4 54.Ke3 Nf5 55.Kd3 (55.Ke4 Ke7–/+) 55...Ke7 56.Na4 Kd6 57.Nc3 e5 58.Ne4 Ke7 59.Nc5 Nd6 60.Kc3 (60.g4 h5 61.f3 hg4 62.fg4 f5 63.gf5 gf5–+) 60...f5 (60...h5 61.Kd3–+) 61.Kd2 (61.Kd3 Ne8–+) 61...Nc8 (61...Nb5 62.Nd3 Ke6 63.Ke3–+) 62.Kd3 (62.Nb7 Na7–/+) 62...Kd6–+ 63.Kc4 (63.Na4 e4 64.Kd4 Ne7–+) 63...Nb6 64.Kb5 Nd7 65.Nd7 (65.Nb7 Kd5 66.Nd8 Nc5–+) 65...Kd7 66.Kb4 (66.Kc4 Ke6 67.Kd3–+) 66...f4 67.Kc4 (67.g4–+) 67...fg3 68.fg3 Ke6 69.g4 h5 (69...h5 70.gh5 gh5–+) 0–1. DEFFM – GuestXBRT, freechess.org, 2020.

6.c4 b6

7.a4 0–0 8.d4=+.

7.a4 a5 8.Be2= 0–0 9.Na3 Bb7 10.0–0 Nbd7 11.d4 Rc8 12.Rc1 Qc7 (12...cd4 13.Nd4 Nc5 14.Bf3=) 13.cd5 (13.Bd3 Rfd8=) 13...Bd5 14.Nc4 (14.Bc4 Be4=) 14...Rfd8 (14...Ng4 15.Ncd2=+) 15.Nfe5 (15.Bd3 Qb7=) 15...Ne5=+ 16.Ne5 Nd7 (16...Bd6 17.f4=+) 17.Nc4 (17.Nd7 Qd7 18.dc5 Rc5 19.Rc5 Bc5=) 17...Qb7 18.f3 f5 (18...cd4 19.Bd4 Nc5 20.Qc2=) 19.Qe1 Qb8 (19...Bg5 20.f4 Be7 21.Qg3=) 20.e4+= fe4 (better is 20...Ba8!?+=) 21.fe4+/– Ba8 22.Bg4 cd4 (22...Nf8 23.d5 Bd6+–) 23.Be6 Kh8 24.Rf7 Ne5? (24...Bb4 25.Qh4 Rc4 26.Bc4 Ne5+–) 25.Re7 (25...Nd3 26.Bd4 Rd4 27.Bc8 Qc8 28.Nd6+–) 1–0. Lehr,Thomas – Kluver,Karsten, Schleswig Holstein–ch, 1993.

7.a4 dc4 8.Na3 c3 9.Bc3 0–0. Bendig,Frank (2025) – Beullens,Ronald (2015), IECG, 2001.

7.Qc2 Bb7 8.d3 d4 (8...a6 9.ba6 Ra6 10.d4=) 9.e4 (9.Be2 de3 10.fe3 Ng4=) 9...Nbd7 10.Nbd2 (10.Be2 0–0=) 10...Qc7 11.g3 (11.Be2 a6=+) 11...h6 12.Bh3 g5 (12...a6 13.Bg2=+) 13.Bg2 0–0 (13...g4 14.Ng1=+) 14.a4 h5 (14...a6 15.h3=) 15.Nb3 (better 15.Ng5!? e5 16.0–0+–) 15...g4= 16.Nh4 Nh7 17.f3 (17.h3 Bh4 18.gh4 f5=) 17...Bh4 18.gh4 f5 19.Qe2 f4 ½–½. Rodriguez,Alberto (2210) – Guanca,Felipe (1615), Torneo Mayor – Championship de Salta, 2017.

7.Nc3 0–0 8.d4 Bb7 9.Be2 Nbd7 10.0–0 cd4 11.Nd4 dc4 12.Bc4 Ne5 13.Be2 Rc8 14.Rc1 Nc4 15.Ba1 Ba3 16.Rb1 (16.Rc2!? Bb4 17.Nb1+=) 16...e5+= 17.Nc6 Bc6 18.bc6 Nd2 (18...Rc6? 19.Qa4 Qc8 20.Bc4 Rc4 21.Qa3+–) 19.Qa4 (19.Nb5 Nb1 20.Qd8 Rfd8 (worse is 20...Rcd8 21.Rb1 Rd2 22.Bc4+=) 21.Rb1 Rd2–/+) 19...Nb1 20.Rb1 Bc5 21.Bf3 Qe7 22.Nd5 Qe6 23.Rd1 Rfd8 (23...Qc6?? 24.Ne7 Be7 25.Bc6+–) 24.Nf6 gf6 25.Rd8 Rd8 26.h3 (26.c7 Rc8 27.Bd5 Qf5=) 26...Rc8 (26...Bd6 27.Bc3+=) 27.Qa7 (27.Bd5! Qe8 28.Qa7 Rc6 29.Bc6 Qc6 30.Qa6=) 27...e4+= 28.Bg4 f5 29.Bh5 Bf8 (better is 29...Kf8!?+=) 30.Qb7+= Be7 (worse is 30...Rc6 31.Bf7 Qf7 32.Qc6 Qa2 33.Bd4+/–) 31.Qb6 (31.Bf6! Bf8 32.g4=) 31...Rc6 32.Qb8 Qc8?? (better is 32...Rc8 33.Qg3 Kf8 34.Qg7 Ke8+=) 33.Qg3+/– Kf8? (better is 33...Rg6 34.Bg6 fg6+/–) 34.Qg7+– Ke8 35.Qf7 Kd8 (35...Kd7 36.Qf5 Kd8 37.Qh7 Rc1 38.Kh2 Qc5 39.Qh8 Kc7+–) 36.Qg8 (better is 36.Qe8 Kc7 37.Qe7 Kb8 38.Be5 Ka8 39.Qh7+–) 36...Kc7+/– 37.Be5 Kb7 (37...Bd6!? 38.Qh7 Qd7 39.Bd6 Kd6 40.Qd7 Kd7+–) 38.Qh7+– Qd7 39.Qf7 Qe6 40.Qe6 Re6 41.Bd4 Rc6 42.g3 Bf6 43.Bf6 Rf6 44.Kg2 Kc7 45.a4 Kd6 46.Be2 Kc5 47.f4 ef3? (47...Kb6+–) 48.Kf3 (48.Bf3?! Ra6+–) 48...Kb4 49.Bb5 Kc3 50.Kf4 Kd2 51.Bd7 Ra6 52.h4 (worse is 52.Kf5 Ke3 53.h4 Rd6+–) 52...Ra7 53.Bf5 Ra4 54.e4 Ke2 55.h5 Kf2 (55...Ra1 56.e5+–) 56.h6 Ra3 57.h7 Rf3 (57...Ra8 58.g4 Ra3 59.h8Q Rf3 60.Ke5+–) 58.Ke5 1–0. Krebbers,Wilfried (2115) – Stoeckmann,Helmut (2120), NRW Class1, 2008.

7.d4 0–0 8.Bd3 (8.Nc3 a6=) 8...dc4 (8...a6 9.a4=) 9.Bc4 Bb7 (9...a6 10.Nc3=) 10.0–0 Nbd7 (10...a6 11.dc5 Bc5 12.Qe2=) 11.Ng5 (11.Qe2 Rc8=) 11...Nd5 (11...a6 12.Nc3=) 12.Nh3 (12.Nf3 a6=) 12...Bd6 (12...cd4 13.Bd4 Bf6 14.Re1=+) 13.e4= Ne7 (13...Nc7 14.dc5 Bc5 15.Qf3=) 14.e5 (14.dc5 Nc5 15.e5 Bc7=) 14...Bc7 (14...Bb8 15.Bd3 cd4 16.Bh7 Kh7 17.Qh5 Kg8 18.Ng5=+) 15.Qh5 Nf5 (15...Bd5!? 16.Rc1 Bc4 17.Rc4 cd4=) 16.Ng5+= h6 (better is 16...Nh6+=) 17.Ne6!+– fe6 18.Be6 Kh8 19.Bf5 Kg8 (19...cd4 20.f4+–) 20.Qg6 Qe7 (20...Rf5 21.Qf5 cd4 22.Qe6 Kh8 23.Bd4 Qg5+–) 21.Qh7 Kf7 22.e6 (22...Ke8 23.ed7 Kd8 24.dc5 Bg2 25.Rc1+– (25.Qg7?! Bf1 26.Be4 Bb5 27.Qe7 Ke7+–; 25.Bg7 Bd5 26.Qh6 Rg8+/–)) 1–0. Wall,Bill – Johnson,Martin, Dayton, OH, 1983.

7.d4 a6=.

7.cd5 ed5 8.Be2 (8.Nc3 a6 9.a4 0–0 10.Bd3 Nbd7 11.0–0 Bd6 12.Qc2 Re8 13.ba6 Ba6 14.Ba6; 8.Bd3 a6 (8...c4 9.Bc2 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Nbd7 13.Bd4 Bb7 14.Nc3) 9.Nc3 (9.a4 ab5 10.ab5 Ra1 11.Ba1 Nbd7 12.Nc3 0–0 13.0–0 Qc7 14.Qc2) 9...c4 10.Be2 ab5 11.Nb5 Nc6 12.0–0 Ba6 13.a4 0–0 14.d3) 8...Bb7 (8...0–0 9.0–0 (9.a4 Bf5 10.0–0 Qd6 11.d4 Nbd7 12.Nc3 h6 13.dc5 bc5 14.a5; 9.Qa4 a6 10.Nc3 Bb7 11.Qf4 Bd6 12.Qh4 Nbd7 13.a4 Qe7 14.0–0; 9.Qc2 a6 10.0–0 ab5 11.Bb5 Bb7 12.Ne5 Nfd7 13.a4 Ne5 14.Be5) 9...a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Nbd7 13.Nc3 Qc7 14.Bb2; 8...a6 9.0–0 (9.a4 0–0 10.Na3 ab5 11.Nb5 Nc6 12.Ne5 Bb7 13.f3 Nd7 14.Nc6; 9.Qa4 0–0 10.Nc3 Bb7 11.Qf4 Bd6 12.Qh4 Nbd7 13.a4 Re8 14.0–0; 9.Ne5 0–0 10.Na3 Bd6 11.Bf3 Nbd7 12.d4 cd4 13.Nc6 Qe8 14.Qd4; 9.Na3 0–0 10.0–0 ab5 11.Nb5 Nc6 12.Ne5 Ne5 13.Be5 Bf5 14.a4) 9...0–0 10.Na3 ab5 11.Nb5 Nc6 12.Ne5 Ne5 13.Be5 Bf5 14.a4) 9.d4 (9.0–0 0–0 10.Qc2 a6 11.Nc3 ab5 12.Nb5 Nc6 13.Ne5 Nb4 14.Qd1) 9...Nbd7 (9...a6 10.ba6 Ba6 11.Ne5 0–0 12.Nc3 Be2 13.Qe2 Qc7 14.0–0) 10.0–0 (10.dc5 bc5 11.Nc3 0–0 12.0–0 Bd6 13.Qc2 Re8 14.Rad1) 10...Ne4 (better is 10...c4!?= 11.Ne5 Bd6 12.f4 a6 13.Nc3 0–0 14.Qc2; 10...0–0 11.Nc3 Bd6 12.dc5 bc5 13.Qc2 Re8 14.Rad1) 11.dc5+/– bc5 12.Bg7 (12.Nc3 Nc3 13.Bc3 0–0 14.Qd2) 12...Rg8 13.Bb2 (13.Bc3!?+/– Bf6 14.Bf6) 13...Bf6= 14.Qc2 Rc8 15.Nbd2 Qe7 (15...Bb2 16.Qb2 Qf6 17.Qf6 Ndf6 18.Ne4 Ne4 19.Rac1+/–) 16.Ne4 de4 17.Nd2 Bb2 18.Qb2 Ne5 19.Kh1 Qg5 20.Rg1 Nd3 21.Bd3 ed3 22.Nf3 (22.e4!?+/–) 22...Qf5= 23.Qe5?? (better is 23.Ne5=) 23...Qe5–/+ 24.Ne5 c4 25.Rad1 Bd5 26.f3–/+ f6 27.Nd3+= cd3 28.Rd3 Ba2 29.Ra3 Bc4 30.Rc1 Rg7–/+ 31.Rac3 Rgc7 32.Kg1 Kd8 33.Rd1 Rd7 34.Rdc1= Rdc7 35.Rd1 Ke7 36.Rdc1 Kd6–+ 37.Rd1 Kc5 38.Rdc1 Kb6 39.Rd1 Bb5 40.Rd6 Rc6 41.Rcc6 Rc6 42.Rc6 Kc6 43.Kf2 a5 44.Ke1 a4 45.Kd2 Kd5 46.Kc3 f5 47.h3 Ke5 48.g4 fg4 49.hg4 Bc6 50.f4 Ke6 51.f5 Ke5 52.Kb4 Kf6 53.Kc3 Bf3 54.Kb4 Bg4 55.Ka4 h5 56.Kb4 h4 57.Kc4 h3 58.Kd4 h2 59.e4 Bf5! 60.ef5 h1Q 61.Kc4 Qc6 62.Kd3 Kf5 63.Kd4 Kf4 64.Kd3 Qc5 65.Kd2 Ke4 66.Ke1 Qc2 67.Kf1 Kf3 68.Ke1 Qc1# 0–1. Linhares,Obaldine (1765) – Ribeiro,Mauricio Suzini (1760), Naval CC, 1995.

7.Be2 a6 8.a4 (8.0–0 0–0=) 8...ab5 (8...0–0 9.0–0=) 9.ab5 Ra1 10.Ba1 0–0 (10...dc4 11.Bc4 Bb7 12.d4=) 11.d3 Bd6 (11...Bb7 12.0–0=) 12.Nbd2 (12.0–0 Bb7=) 12...Re8 (12...Nbd7 13.0–0=) 13.0–0 e5 14.cd5 Nd5 15.Nc4 Qf6 (15...f6 16.Nfd2=) 16.Nfd2 Qg6 (better is 16...Bc7!?=) 17.Bh5 Qg5?? (better is 17...Qe6 18.Ne4 Be7 19.Be5 Nd7+/–) 18.Ne4+– Qe7 19.Ned6 Qd6 (19...Rf8+–) 20.Nd6 Re6 21.Bf7 Kf8 22.Be6 Be6 23.Qh5 (23...Nf6 24.Qe5+–) 1–0. Fritz 10 – NN, 2007.

7.d4 Bb7

8.dc5 bc5 9.Nc3 0–0=.

8.Bd3 a6 9.a4 ab5 10.ab5 Ra1 11.Ba1 dc4 12.Bc4 0–0 (12...cd4 13.Bd4 (worse 13.ed4 Bb4 14.Bc3 Bf3 15.Qf3 Qd4–/+) 13...Qc7 14.Nbd2=) 13.0–0 (13.dc5 Bc5 14.Qd8 Rd8 15.Bf6 gf6=) 13...Nbd7 14.Nbd2 (14.Qe2 Qa8 15.Nbd2 Rc8=) 14...Ne4 (14...Qc7 15.Qe2=) 15.Ne4 Be4 16.Nd2 (16.d5 ed5 17.Bd5 Bg6=) 16...Bb7 (16...Bg6 17.Qg4=) 17.e4 (17.Nb3 cd4 18.Qd4 Nf6=) 17...cd4 18.Bd4 Nc5 (18...Nf6 19.Qa1=) 19.Bb2 (19.Qa1 Qd7=) 19...Ne4 (19...Be4 20.Ne4 Qd1 21.Rd1 Ne4 22.f3=+) 20.Ne4 Be4 21.Qg4 The mate threat is Qxg7 21...Bg6 22.Rd1 Qc7 23.h4 (23.Bd3!?=+) 23...h5–/+ 24.Qe2 Bh4 (24...Rc8 25.Bb3–/+) 25.Be5 Qc8 26.Rd6 (26.Bd3!?–/+) 26...Qc5–+ 27.Rc6 Bf2 28.Qf2 (28.Kf1 Qe3 29.Bg7 Kg7 30.Qf2 Qc1 31.Qe1 Qe1 32.Ke1–+) 28...Qe5 29.Rb6 Qa1 (29...Rd8 30.Bf1–+) 30.Kh2 Qa7 31.Qc5 Rb8 (31...Be4 32.Rc6 Qa8 33.Rc7 Bg2 34.Qh5–+) 32.Rb8 Qb8 33.Kg1 Qg3 34.b6 Be4 Threatening mate... how? 35.Bf1 (35.Qf2 Qg5–+) 35...Qb3 (35...h4 36.Qf2 Qg5 37.Qd4–+) 36.Ba6 (36.Kh2 Qb2–+) 36...Qb2 Threatening mate: Qxg2 37.Bf1 Qb1 (37...e5 38.Qb5 Qb5 39.Bb5–+) 38.Qc8 (better 38.Qb5!? Qb5 39.Bb5–/+) 38...Kh7–+ 39.Qc5 (39.Qa6 e5–+) 39...Kh6 (better 39...Bd3!? 40.Qh5 Kg8 41.Qf3 Qb6 42.Kh2 Bf1 43.Qf1 Qd6 44.Kh3–+) 40.Kf2 Qb2 (40...h4 41.Qb5 Qa1 42.Qb4 Qf6 43.Kg1–+) 41.Be2–/+ The mate threat is Qxh5 41...Bd5 42.Ke3 (42.g3 Qf6 43.Ke1 Qg5–+) 42...Qe5 (better 42...h4 43.Kf2 Kg6–+) 43.Kf2=+ Qb2 (43...Kg6 44.Qe3 Qb2–+) 44.Ke3–+ h4 45.Bf3 (45.Kf2 Kg6–+) 45...Qb3 (45...h3 46.Bd5 h2 47.Qc8 Qb6 48.Ke2 Qb2 49.Ke3–+) 46.Kf2 h3 (better 46...Bf3 47.gf3 Qb2 48.Kg1 Kg6–+) 47.Bd5= ed5 (47...Qb2 48.Kg3 ed5 49.Kh3=+) 48.gh3 Qb2 (48...g5 49.Qc7 Qh3 50.Qd6 Kh5 51.Qd5 Qh2 52.Kf1 Qf4 53.Kg2=) 49.Kg3 (49.Kf3 Qf6 50.Kg2 Qe5=) 49...Qe5 50.Kf2 Qf4 51.Ke2 White threatens strongly Qe3 51...d4 (51...Qa4 52.Qd5 Qa6 53.Kf3 Qf1 54.Ke3 Qg1 55.Ke2 Qb6 56.Qf7 Qb5 57.Kf2=) 52.Qc6 (52.Qe7 Qg3=) 52...g6= 53.b7 Qe3 54.Kd1 Qd3 55.Kc1 Qa3 (55...Qf1 56.Kd2 Qf2 57.Kd3 Qe3 58.Kc4 Qc3 59.Kd5 Qf3 60.Kc5+=) 56.Kd1 (better 56.Kc2 Qa2 57.Kd3 Qb3 58.Kd4+–) 56...Qb3= 57.Kd2 Qe3 58.Kd1 Qd3 ½–½. Hadj Sassi,Nabil – Hahn,Bernd, Berlin, 1998.

8.Bd3 a6 9.ba6 Ba6 10.Nbd2 dc4 11.Nc4 b5=.

8.Bd3 dc4 9.Bc4 a6 10.0–0=.

8.Be2 Nbd7 9.Nbd2 0–0 10.Qb3 dc4 11.Bc4 cd4 12.Bd4 a6 (12...Nc5 13.Qc2=) 13.0–0 (13.ba6 Ba6 14.Rd1 Nc5=) 13...Nc5 (13...e5 14.Bc3 ab5 15.Qb5=) 14.Qb2 Ne8 (14...ab5 15.Bb5 Bd5 16.Rfb1=) 15.a4 (15.ba6!? Ba6 16.Rfb1+/–) 15...Bf6 (15...Nf6 16.Rfd1+=) 16.Rfd1+= Bd4 (16...ab5 17.ab5 Ra1 18.Qa1 Bd4 19.Qd4=) 17.Nd4 (17.ed4 Ne4=) 17...a5 (17...Nd6 18.ba6 Bg2 19.Kg2 Nc4 20.Nc4 Qd5 21.Kg1 Qc4 22.a5 Ra6 23.ab6 Ra1 24.Qa1=) 18.N2f3 (18.Qc2 Qf6=) 18...Qf6= 19.Qa2 (19.Qe2 Rc8=) 19...Nc7 (19...Rc8 20.Be2+=) 20.Nc6= Rfc8 (20...N7a6 21.Nfd4 Rfc8 22.Rab1=) 21.Nfe5 Ne8 (21...Bc6 22.Nc6 N7a6 23.Qd2=) 22.Rac1 (22.Rd4 Rc7+=) 22...Kh8 (22...Rc7 23.Qc2+=) 23.Rd4 Bc6 24.Nc6 g5 (24...Rc7 25.Rcd1+=) 25.Rcd1+/– Ng7 (25...Rc7+/–) 26.Qa1 (26.e4 Qh6+/–) 26...Rf8 (26...Nf5 27.Rg4 Qa1 28.Ra1 f6+=) 27.Be2?? (27.e4 Qg6+/–) 27...Nf5 (27...Nb3 28.Qb1 Nd4 29.Rd4=) 28.R4d2 (better is 28.Rg4 Qa1 29.Ra1+/–) 28...Qa1+= 29.Ra1 Nb3 30.Rda2 (30.Rad1!? Nd2 31.Rd2+=) 30...Na1–/+ 31.Ra1 Nd6 32.Bf3 Rae8 (32...Rac8 33.Rd1 Nb7 34.Rd4–/+) 33.Rd1 (33.h4 gh4 34.Rd1 Nb7–/+) 33...Nb7 34.Ne5 (better is 34.h4–/+) 34...Re7 (34...Nc5 35.Nd7 Nd7 36.Rd7–/+) 35.Nc6 (better is 35.Nc4=) 35...Rc7–/+ 36.Rd2 (36.Kf1 Nc5 37.Rd4 f5–/+) 36...Nc5 (36...f5 37.h3–/+) 37.Rd4 Rd7 (37...f5 38.h3–/+) 38.Rc4 (38.Rd7 Nd7 39.Bd1 Rc8–/+) 38...Rd2 39.g3 (39.Na5 Ra8 (39...ba5?! 40.Rc5 Ra2 41.h4+=) 40.Nc6 Ra4 41.Ra4 Na4–+) 39...Rc8 (39...Ra2!? 40.Rg4–+) 40.Kf1 (40.h4 gh4 41.Rh4 Ra2–+) 40...Rc7 (40...Nd3 41.Be2 Nb2 42.Re4–+) 41.Nd4? (41.Na5!? Ra2 42.Nb3 Ra4 43.Ra4 Na4 44.Bc6–+) 41...Rd7 (41...Ra2 42.Bd1–+) 42.Nc6 (42.Bc6 Rd6 43.Nf3 Ra2 44.Ng5 Rdd2–+) 42...f6 (42...Ra2 43.Ne5 Rdd2 44.Nf7 Kg8 45.Ng5 Rf2 46.Kg1–+) 43.Be2 (43.Be4 h5–+) 43...Ra2 44.Nd4 (44.Rd4 Ra4 45.Rd7 Nd7–+) 44...e5 (44...Na4 45.Rc6 h5 46.Re6–/+) 45.Bg4 Rd6 46.Nc2 (46.Ne2 Ra4 (46...Na4?! 47.Rc8 Kg7 48.Rc7 Kg8 49.Rc8 Kf7 50.Rc7 Ke8 51.Rh7–+) 47.Ra4 Na4–+) 46...Rd2 (46...Na4?! 47.Rc8 Kg7 48.Rc7 Kf8 49.Rc8 Ke7 50.Rc7 Ke8 51.Bf5–+) 47.Bf5 Ra4 (47...Ra4 48.Ra4 Na4–+) 0–1. jaddwarrior (2045) – Cramagica (2075), ChessWorld.net, 2015.

8.dc5 Bc5

9.cd5 Bb4 10.Nbd2 Bd5 11.Be2+=.

9.cd5 Bd5 10.Nc3 (10.Be2 0–0+=) 10...0–0 (10...Bb7 11.Qd8 Kd8 12.Ne5=) 11.Nd5+– Nd5 12.a3 (12.Bc4 a6 13.0–0 ab5 14.Bb5 Qe7+=) 12...Nd7+= 13.e4 N5f6 14.Bd3 Re8 (14...Be7 15.Qe2+=) 15.0–0+= Qc7 (15...Rc8 16.Rc1+=) 16.e5+– Nd5 17.Qd2 (17.Rc1 Red8+–) 17...Nf8 (17...Be7 18.Rac1 Nc5 19.Ng5 Bg5 20.Qg5=) 18.Rac1 (18.Rfd1 Ng6+=) 18...Qe7 19.a4 (19.Nd4 Bd4 20.Bd4 Qa3+=) 19...Rad8 (19...Ng6 20.g3=) 20.Bd4+= Bb4 (20...Nd7 21.Rc4+=) 21.Qa2 Ng6 (21...Nd7 22.Qb1 Ba3 23.Rc6+=) 22.Rfd1 Ngf4 23.Be4 g5 (23...Bc3 24.g3 (24.Bc3? Nc3 25.Qc2 Rd1 26.Rd1 Nd1 27.Qd1 Rc8–+) 24...Nb4 25.Qc4+=) 24.h3 (24.g3 Nh3 25.Kg2 g4+–) 24...h5+= 25.Kh1 f5? (better 25...Rc8+=) 26.ef6!+– Nf6 27.Bc6 Rf8 (27...g4 28.Ne5 Rf8 29.g3 Nh3 30.Ng6+–) 28.Ng5 N6d5 (28...Ba3 29.Rb1 Bc5 30.Bc5 Qc5 31.Ne6 Ne6 32.Qe6 Kg7 33.f4+–) 29.h4 e5 (29...Ba3 30.Rc4 Bc5+–) 30.Ba1 Kg7 31.Bd5 Nd5 (31...Rf6+–) 32.Rd5 Rd5 33.Qd5 Bc5 34.Be5 Kh6 35.Qc6 (35.Qc6 Qf6 36.Bf6 Rg8 37.Rc5 Rg6 38.Qd7 Rg5 39.hg5 Kg6 40.Qg7) 1–0. Luzuriaga,Norberto Horacio – Suermann,Uwe, corr, 2000.

9.cd5 Bd5 10.Nc3 Bb4 11.Be2 0–0 12.0–0 Nbd7 (12...Bc3!? 13.Bc3 Nbd7+=) 13.Nd5+– Nd5 14.e4 (14.Bc4!? N5f6 15.Nd4+–) 14...Nc3= 15.Bc3 Bc3 16.Rc1 Rc8 17.Qb3 Bf6 18.Rc6 Nc5 (18...Ne5 19.Ne5 Be5 20.Rfc1 Rc6 21.bc6+= (worse 21.Rc6 Qh4 22.g3 Qe4=+)) 19.Rc8 (19.Qe3 e5 20.Rd1 Qe8 21.Rc8 Qc8=) 19...Qc8= 20.Qc4 (20.Qe3 e5=) 20...Qc7 21.Rd1 (21.g3 Rc8=) 21...Rc8 (21...Qf4 22.Nd2=+) 22.Rc1 (22.g3 g6=) 22...Qf4 (22...g6 23.g3=+) 23.g3= Qc7 24.Nd2 g6 25.Nb3 Qe5 (25...Qd8 A) 26.Nc5?? Rc5 (26...bc5?! 27.f4=) 27.Qc5 bc5 28.Rc5 Qd4–+; B) 26.Rd1 Qf8 27.Rd2=) 26.Rc2 (26.f4 Qb2 27.e5 Be7=) 26...h5 (26...g5 27.Qb4=) 27.f4+= Qb8 (27...Qc7 28.e5 Be7 29.Nd4+=) 28.e5 Be7 29.a4 (29.Nd4 Qc7+=) 29...h4 30.Bf3 Rd8 31.a5 (31.Nd4 Qc7+=) 31...Rd3 (31...Nb3 32.Qb3 ba5 33.Qc4–/+) 32.Rc3 (better 32.Nd4!?=) 32...Rc3–/+ 33.Qc3 Nb3 34.Qb3 Bc5 (34...ba5 35.Kg2–/+) 35.Kf1 (35.Kg2 ba5 36.Qc4 Be3=+) 35...Qd8 (better 35...ba5 36.Qc4 Be3–/+) 36.a6?? (36.Qd1 Qd1 37.Bd1 ba5=) 36...Qd4?? (better 36...Qd2 37.Be2 Qd4–+) 37.Qc2?? (better 37.Kg2=) 37...Qg1–+ 38.Ke2 Qh2 (better 38...Qf2!? 39.Kd1 Qf3 40.Qe2 Qb3 41.Qc2 Qb5 42.Qd2–+) 39.Kd3 Qc2 (better 39...Qg3 40.Qe2 h3–+) 40.Kc2–/+ hg3 41.Kd3 Kg7 42.Ke2 f6 (better 42...Bg1–/+) 43.Kf1? (better 43.ef6 Kf6 44.Bg2=+) 43...fe5 (43...Be3 44.ef6 Kf6 45.Be4–+) 44.fe5 g5?? (better 44...Bd4–+) 45.Kg2=+ Bf2 46.Bg4 Kf7 47.Kf3 Bd4 48.Kg3 Be5 49.Kf3 Ke7 50.Ke4 Kd6 51.Be2 Bf4 52.Bg4 (52.Kd4 Bd2=+) 52...Kc5 53.Be2 Bd6 (53...Bd2 54.Ke5=+) 54.Kf3 Kd4 55.Kg4 Bf4 56.Bf1? (better 56.Bf3=+) 56...e5–+ 57.Kf5?? (better 57.Kf3–+) 57...e4 58.Ke6 (58.Kg4 Kc3–+) 58...e3 (58...Ke3 59.Bg2 Kd3 60.Kd7–+) 59.Be2 (59.Kf5–+) 59...Kc5 (59...Kc3 60.Kf5 Kd2–+) 60.Kd7 g4! 61.Bg4 Kb5 62.Be2 Ka5 63.Kc6 Be5 64.Kb7?? (64.Bd3 Bd4–+) 64...Bd4 (better 64...b5 65.Kc6 b4–+) 65.Ka7?? (65.Kc6–+) 65...b5 66.Kb7 b4 67.Kc6 b3 68.Kd5 Ba7 69.Ke4 b2 0–1. mtr – bobik, internet, 2001.

9.cd5 Bd5 10.Nc3 Bb7 11.Qd8 Kd8 12.Ne5=.

9.cd5 Bd5 10.Be2 0–0+=.

7.Be2 0–0

8.0–0 a6 9.a4 dc4 10.Bc4 ab5 11.ab5 Ra1 12.Ba1 Ne4 13.d4 Nd7 14.Qc2 Nd6 15.Bd3 Nb7 16.Bh7 Kh8 17.Bd3 Bf6 18.Nbd2 Qc7 19.Nb3 Be7 20.Bb2 Na5 21.Na5 ba5 22.Be4 Bd6 23.Ba3 Rd8 24.Bc6 cd4 25.Ng5 Bh2 26.Kh1 Nf6 27.ed4 Rd4 28.Nf7 Qf7 29.Kh2 Qh5 30.Kg1 Ng4 31.Rc1 Qh2 32.Kf1 Qf4 33.Ke1 Nf2 34.Qf2 Qe5 35.Kf1 Rf4 36.Bf3 Qb5 37.Kg1 Bb7 38.g3 Qg5 0–1. Kultica – raghavendrakarthik, playchess.de, 2002.

8.0–0 Bb7 9.d4 1–0. Steche – Tejler, corr SOK–89–33.

7.Be2 Bb7

8.0–0 0–0 9.d4=.

8.0–0 Nbd7 9.d3 0–0=.

8.0–0 Nbd7 9.cd5 ed5 10.Nc3 0–0 11.d4 (11.Qc2 a6=) 11...c4 12.Qc2 (12.a4 Re8=) 12...Re8 13.Rfc1 Nf8 (13...a6 14.a4=) 14.a4 (14.Ne5 Bd6=) 14...Bc8 (14...a6 15.Ne5=) 15.Ne5+= Bd7 (15...Be6!?+=) 16.e4+/– (16.Nd7?! Qd7 (< 16...N8d7 17.Bf3+/–) 17.e4 de4 18.Bc4 Bd6= (18...Qd4? 19.Nd5 Qc5 20.Qb3+–)) 16...Ne6 (16...de4 17.Ne4 (17.Nc4?! Rc8=) 17...c3 18.Bc3+/–) 17.Nd5+– (17.ed5?! Nd4 18.Qd1 Ne2 19.Ne2 Bc8+=; 17.Nd7 Qd7 18.Nd5 Nd5 19.ed5 Nf4 20.Bc4 Ng2+=) 17...Rc8? (better is 17...Nd5 18.ed5 Nf4+–) 18.Bc4 Bf8 (18...a5 19.ba6 Ng5 20.Nf6 Bf6 21.Nd7 Qd7 22.e5+–) 19.Qe2 (19.Nf6 gf6 20.Nd7 Qd7+–) 19...Be7 (19...Nd5 20.Bd5 (20.Nd7?! Ndf4 21.Qf3 Qd7+/–) 20...Rc1 21.Rc1+–) 20.Ne7 Qe7 21.Qe3 (21.a5 ba5 22.Ra5 Qb4+–) 21...h6 (21...Qb4 22.Ba3 (22.Nd7?! Qb2 23.Nf6 gf6 24.Be6 fe6+–) 22...Qa5 23.Bb3+–) 22.Ba3 Qd8 23.f4 Rc7 24.Ra2 Bc8 25.Rd2 Bb7 (25...Nh5 26.f5 Qg5 27.Qg5 Ng5 28.Rdc2+–) 26.Nc6 (26.d5 Nf4 27.Qf4 g5 28.Nf7 A) 28...gf4?? 29.Nd8 Rd8 30.d6 Kg7 31.e5+– (< 31.dc7 Rd2 32.Bb4 Rd7+–); B) 28...Rf7+–) 26...Qa8 (26...Bc6 27.bc6 Ng4+–) 27.d5 Nd8 (27...Nc5 28.e5 Nfd7 29.a5+–) 28.e5 Bc6 (28...Nh7 29.a5+–) 29.bc6 Qc8 (29...Nc6 30.dc6 Rc6 31.Qd3+–) 30.Bd6 (30...Nd5 31.Bd5+–) 1–0. pcmvr (1885) – meliton (1640), internet, 2006.

8.d4 dc4 9.Bc4 a6 10.0–0=.

8.d4 Nbd7 9.Nbd2 cd4 10.ed4 (10.Nd4 Rc8=) 10...dc4=+ 11.Nc4 (11.0–0 0–0=+) 11...0–0 (11...Bb4 12.Kf1=+) 12.0–0 Rc8 13.a4 (13.Rc1 Bd5=+) 13...Qc7 (13...Bf3!? 14.gf3 Nd5–/+) 14.Nce5 (14.Ba3 Ba3 15.Ra3 Bf3 16.Rf3 Nd5=+) 14...Rfd8 15.Rc1 Qb8 (15...Qd6 16.Rc8 Rc8 17.Nd7 Nd7 18.Re1=+) 16.Qb3 (16.Nc6!? Bc6 17.bc6+=) 16...Bd5 17.Bc4 Bc4 (17...Qd6 18.Ng5 Rf8 19.Bd5 Rc1 20.Rc1 Qd5 21.Qd5 Nd5 A) 22.Nd7 Bg5 23.Ba3 Rd8–/+ (23...Bc1 24.Bf8 Bb2 25.Bd6–/+); B) 22.Ne6 Ne5 23.Nf8+/–) 18.Rc4= Rc4 19.Qc4 Qc8 (19...Rc8 20.Nc6 Bd6 21.Rc1+– (21.Nb8 Rc4 22.Ne5 Ne5 23.de5 Bb8 24.ef6 gf6=)) 20.Qb3 (20.Qc8 Rc8 21.Rc1 Rc1 22.Bc1 Ne5 23.de5 Ne4=) 20...Nd5 21.Re1 N7f6 22.Ng5 h6? 23.Ngf7+/– Bb4?? 24.Nh6 gh6+= 25.Qg3 Kf8 26.Qg6 Qc7= 27.Qf6?? Ke8 28.Re4 Qe7 (29.Qg6 Kf8 30.Qh6 Qg7 31.Qe6 Qh7+–; better is 28...Nf6 29.Re2 Rd4–+) 0–1. toll (1640) – Quickdraw, ICC, 2003.

8.d4 Nbd7 9.cd5 Nd5 10.0–0 0–0=.

8.cd5 Bd5 9.Nc3 0–0 10.0–0 a6 11.Nd5 Nd5 12.d4=.

8.cd5 Bd5 9.Nc3 0–0 10.0–0 (10.d4 a6=) 10...Nbd7 (10...a6 11.Nd5 Nd5 12.d4=) 11.d4 (11.Nd5 Nd5 12.d4 Rc8+=) 11...Rc8 (11...Bb7 12.Qc2=) 12.Rc1 Bd6 (12...Qc7 13.Nd5 ed5 14.dc5 bc5 15.Qc2=) 13.Nd2 (13.dc5 Nc5 14.Nd5 Nd5+=) 13...cd4 (13...Re8 14.dc5 bc5 15.f4=) 14.Nd5 Nd5 15.Bd4 (15.Nc4 Bc5 16.Bd4 Qh4=) 15...Be5 (15...Rc1 16.Qc1 Qb8 17.f4=) 16.Rc8+= Qc8 17.Be5 (17.Nf3 Bd4 18.Nd4 Ne5+=) 17...Ne5= 18.Qb3 (18.Ne4 Qc7=) 18...Qc3 19.Rd1 Rc8 20.Qa4 (20.Kf1 Nd7=) 20...Qc2 (better 20...Qb2 21.Qb3 Rc2=) 21.Qd4?? (better 21.Qc2 Rc2 22.Nf3 Re2 23.Ne5–/+) 21...Nc3–+ 22.Re1 Ne2 23.Re2 Qd1 24.Nf1 Qe2 25.Qe5 h6 26.Qd6 (26.h3 Rc1 27.Kh2 Rf1 28.Qb8 Kh7 29.Qg3–+) 26...Qb5 (26...Rc1 27.h3 Rf1 28.Kh2 Qf2 29.Qd8 Kh7 30.Qd3 f5 31.Qf1 Qf1 32.a4–+) 27.Qd2 (27.Qd1 Qf5–+) 27...Qd5 (27...Qb1 28.a4–+) 28.Qb2 (28.Qe2 Rc1–+) 28...Qf5 (28...Qd3 29.a4–+) 29.Qb3 (29.Qd2 Rc2 30.Qe1 Qd3–+) 29...Rc2 (29...Rc1 30.a4–+) 30.f3 Qg6 (30...Rc1 31.a4–+) 31.Ng3 (31.g4 Rc1–+) 31...Rc1 32.Kf2 (32.Nf1 Qb1 33.Qb1 Rb1–+) 32…Qc2 (32...Qc2 33.Ne2 Qd2–+) 0–1. Lantzsch,Christian – Haller,Olaf, SJRH–ch U15 Pfeddersheim, 1998.

8.cd5 Bd5 9.Nc3 0–0 10.d4 a6=.

8.cd5 Nd5 9.0–0 0–0=.

6.c4 dc4

7.Na3 a6 8.Bc4 0–0 9.0–0 Bd7 10.Qb3 (10.d3 ab5 11.Nb5 Nc6=) 10...ab5 11.Bb5 (11.Nb5 Nc6=) 11...Bb5 12.Nb5 Nc6 13.Rfd1 (13.Rfc1 Nd5=) 13...Nd5 (13...Qd5 14.Nc7 Qb3 15.ab3=) 14.d4 Na5 15.Qc2 Qb6 16.a4 (16.Nc3 Rfc8=) 16...Rac8 (16...Rfc8 17.e4 cd4 18.Qd3=) 17.dc5+= Rc5 (17...Bc5 18.Qe4 f5 19.Qh4+=) 18.Qe4 (18.Qb1 Nc6+=) 18...Rc4 (18...f5 19.Qd3 Qa6 20.Ba3+/–) 19.Bd4 Nb3 (better is 19...Qa6!?+=) 20.Qd5!+– (worse is 20.Bb6 Re4 21.Rab1 Nb6 22.Rb3 Ra4–/+) 20...ed5 21.Bb6 Na1 22.Ra1 Rfc8 23.g3 R8c6 (23...Rb4 24.Na7 Re8 25.a5+–) 24.a5 Rf6 25.Kg2 Rc2 (25...Bc5+–) 26.Nc7 Rd6 27.Nd4 (27.Rd1 Bd8 28.Nd5 Bb6 29.ab6 Kf8+–) 27...Rd2 28.Bc5 (28.Ne8 Re6 29.Ne6 fe6+–) 28...Rf6 (28...Rd7 29.Be7 Rc7+–) 29.Be7 Rff2 30.Kh3 Rh2 31.Kg4 h5 (31...Rdf2 32.Nd5 f6 33.Nf4+–) 32.Kf4 Rhg2 (32...Rdf2 33.Ke5+–) 33.Bd6 (33.Nd5 Rdf2 34.Ke5 Rb2+–) 33...Rdf2 (33...Rgf2 34.Ke5+–) 34.Kg5 Kh7 (34...Rh2 35.Nd5 Kh7 36.Be5+–) 35.Kh5 Rh2 (35...Ra2 36.Ra2 Ra2 37.Bb4+– (worse is 37.Nd5 Ra5 38.e4 Ra4+–)) 36.Kg4 Rh6 (36...Ra2 37.Ra2 Ra2 38.Bb4+–) 37.Bf4 g5 (37...Rhh2 38.Nd5 Ra2 39.Ra2 Ra2 40.Bc7+–) 38.Kg5 Rg6 39.Kf5 Rg3 (39...Kg8 40.Nd5 Ra6 41.e4+–) 40.Rh1 Kg7 41.Ke5 Rg6 (41...f6 42.Ke6 Rf4 43.ef4 Re3 44.Kf5+–) 42.Nf5 Kf8 (42...Kg8 43.Ne7 Kg7 44.Ng6 fg6+–) 43.Rh8 1–0. Boxleitner – Binder, corr (year?).

7.Na3 c3 8.dc3 Qc7 9.Qc2=.

7.a4 b6 8.Na3 (8.Bc4 0–0=) 8...Bb7 (8...0–0 9.Bc4 Bb7 10.0–0=) 9.Nc4 0–0 10.Be2 (10.a5 ba5 11.Qc2 Bd5=) 10...Nbd7 (10...a6 11.0–0=) 11.d3 Qc7 (11...a6 12.0–0=) 12.0–0 (12.a5 a6 13.ab6 Nb6 14.ba6 Nc4 15.ab7 Qb7=) 12...Rfd8 (12...Ng4 13.e4=) 13.Qc2 (13.a5 Ng4 14.e4 a6+/–) 13...Nd5 (13...a6 14.Rfc1=) 14.Rfd1 (14.a5 Nb4 15.Qb3 Bf6+=) 14...Bf6 (14...a6 15.d4=) 15.Bf6+= N7f6 16.d4 (16.a5 Nb4 17.Qa4 Rac8+=) 16...cd4 (16...a6 17.a5 ab5 18.ab6=) 17.Nd4 (17.Rd4 a6 18.Rad1 ab5 19.ab5 Nb4 20.Rd8 Rd8 21.Rd8 Qd8+=) 17...Rac8 18.Rac1 Qb8 (18...Qe7 19.Bf3=) 19.Qb2 Ne7 20.Qa3 Ng6 (20...Rc7 21.a5+=) 21.Nd2 (21.a5 ba5 22.Na5 Rc1 23.Rc1 Nf4+=) 21...h6 (21...Rc1 22.Qc1 Nf4 23.Bf1=) 22.Bf3 Bf3 (22...Rc1 23.Qc1 Ne5 24.Bb7 Qb7 25.Qc2=) 23.N2f3 (worse is 23.gf3 Qe5+=) 23...Rd5 (23...Qb7 24.Rc8 Rc8 25.a5+=) 24.Nc6 Qb7 25.Rd5 Nd5 26.Qd6 (26.e4 Ndf4 27.Qe3 a6+/–) 26...Kh7 (26...a6 27.Nfe5 Ne5 28.Qe5+=) 27.Ra1 (27.e4 Qe7 28.Qg3 Ndf4+=) 27...Qc7 28.Qc7 Rc7 29.Kf1 f6 (29...Nge7 30.Nd8 Kg8 31.Ne5+=) 30.Nfd4 e5 31.Nf5 (31.Ne6 Rd7+=) 31...Nde7 32.Nfe7 Ne7 33.Ne7 (33.e4 g6+=) 33...Re7= 34.Rc1 Rd7 35.Ke2 ½–½. Lehr,Thomas – Krull,Guenter, Schleswig Holstein–ch, 1993.

7.a4 Nbd7 8.Bc4 0–0 9.a5=.

7.Bc4 a6!?+=.

7.Bc4 Bd7 8.a4 (8.Nc3 0–0+–) 8...a6 (8...0–0 9.0–0+–) 9.Nc3 (9.Na3 0–0+–) 9...ab5 10.ab5 Ra1 11.Qa1 Nd5 (11...Bc8!?+–) 12.Ne4 (12.Bd5 ed5 13.Nd5 Bb5 14.Bg7 Qd5 15.Bh8 f6+–) 12...f5 (12...f6 13.Qa7 Qc7 14.0–0+–) 13.Bd5 (better 13.Ng3 Bf6 14.Bf6 Qf6 15.Qa7+–) 13...fe4? (better 13...ed5!? 14.Ng3 Bf6+–) 14.Be4+– Bf6 15.Bf6 Qf6 16.Qf6 (better 16.Qb1!? b6+–) 16...gf6 17.Bd3 0–0 (17...Kd8 18.Ke2+–) 18.Bc4 (18.Ke2 e5+–) 18...Kg7 19.Ke2 e5 (19...Re8 20.Ra1+–) 20.Ra1 Bg4 (20...e4 21.Nh4 Rd8 22.Ra7+–) 21.h3 (better 21.d3 Rd8 22.h3 Bf3 23.Kf3+–) 21...Bf3? (21...Bh5 22.d3 Bf7+–) 22.gf3 (22.Kf3 Nd7 23.Ra7 Rb8+–) 22...Rd8 (22...Nd7 23.Bd5+–) 23.Ra7 Rd7 24.Be6 Rc7 (24...Re7 25.Bd5+–) 25.Bd5 (better 25.b6!? Re7 26.Bc8 Kh6+–) 25...Nd7 26.Rb7 (26.Bb7?! c4=) 26...Rb7 27.Bb7 Kf7 (27...Nb6 28.Be4+–) 28.Bd5 Ke7 29.d3 (29.Bg8 h6+–) 29...f5 30.Kd2 Kd6 31.Bf7 h6 32.Kc3 Nb6 33.d4 cd4 (33...ed4 34.ed4 Na4 35.Kd3+–) 34.ed4 f4 (34...Ke7 35.Bg8 Kd6 36.Bh7 Nd5 37.Kc4 Nb6 38.Kd3+–) 35.Kd3 Na4 (35...Nd7 36.Ke4+–) 36.Bb3 Nb6 37.Ke4 ed4 38.Kd4 Nd7 (38...h5 39.h4+–) 39.Bc2 (39.Bd5 Nc5+–) 39...Nf6 (39...Nc5 40.Bf5+–) 40.Bf5 Nh5 (40...Nd5 41.Be4 Nb6 42.Bc6+–) 41.Be4 Ng7 (41...Nf6 42.b6+–) 42.b6 Ne6 43.Kc4 Ng5 (43...Nd8 44.Kb5+–) 44.Kb5 Nh3 (44...Ne6+–) 45.Ka6 Nf2 46.b7 Ne4 47.b8Q (47.b8Q Kd5 48.Qb7 Kd4 49.Qe4 Kc3 50.Qf4+–) 1–0. De Visser,Arno – Duinmaijer, 1982.

7.Bc4 0–0

8.0–0 a6 9.Nc3 ab5 10.Nb5 Nc6 11.h3 (11.d4 Na5 12.Be2 c4=) 11...Na5 12.Ne5 (12.Be2 Bd7=) 12...Nc4=+ 13.Nc4 b6 (13...Bd7 14.Qb3=+) 14.d4 Bd7 (better is 14...Ba6 15.a4 Qe8=) 15.Nbd6 (better is 15.a4=) 15...Ba4–+ 16.Qd3? (16.Qf3 Bd6 17.Nd6 Qd6 18.dc5 bc5 19.Bf6 gf6 20.Qf6–+) 16…Bd6 0–1. gtate (1920) – nstone (2280), net–chess.com, 2005.

8.0–0 b6 9.Ng5 h6 (9...Bb7 10.Qc2 h6 11.Bf6 hg5 12.Bc3=) 10.Qf3+= Nd5 11.Ne4 Bb7 (11...Nd7 12.Qg3 N7f6 13.Nbc3+=) 12.Qg3 Nf6 13.d3 Nbd7 14.Nbd2 Qb8 15.f4 Rd8 (15...Qc7 16.a4+=) 16.a4 Kh8 (16...Qc7 17.Bc3+=) 17.a5+– Rg8 (17...Qc7 18.Bc3+–) 18.Qh3 Ne4?? (better 18...Rf8+–) 19.Qh6 (19.Ne4?! Be4 20.de4 Kh7+–; 19.de4 Kh7 20.a6 Bc8+–) 1–0. DEFFM – MrKeres, freechess.org, 2020.

8.0–0 Nbd7 9.a4 b6 10.d4 Bb7 11.Nbd2 cd4 12.Bd4 Nc5 13.Bc5 Bc5 14.Be2 Qe7 15.Qc2 Rac8 16.Nc4 Bd6 17.Rad1 Bb8 18.Qc3 (18.Rd4 Qc7 19.g3 e5+=) 18...Ng4 19.h3 (19.g3 Bd5 20.h3 Nf6+=) 19...Bf3 20.Bf3 (20.gf3 Nh2 21.Rfe1–+) 20...Ne5!–+ 21.Be2? (21.Ne5 Rc5 Double attack (21...Rc3 Pinning; 21...Rc3 Deflection; 21...Rc5 Decoy)) 21...Nc4 22.Bc4 Qc7 (22...Qc7 23.g3 Qc4 24.Qc4 Rc4–+) 0–1. Hal1958 – Ihan, playchess.de, 2002.

8.0–0 Nbd7 9.d4 cd4 10.ed4 b6 11.Qb3 Bb7 12.Be6?? (better 12.Nbd2=) 12...fe6–+ 13.Qe6 Kh8 14.Nbd2 Bf3 (better 14...Nd5 15.Rfe1 Bb4–+) 15.Nf3–/+ Bb4 16.a3 (16.Rac1 Qe7 17.Qe7 Be7–/+) 16...Ba5 17.Rac1 Re8 18.Qb3 Rc8?? (better 18...Ne4–/+) 19.Ng5+– Qe7?? (better 19...Re7 20.Nf7 Rf7 21.Qf7 Ra8+–) 20.Rc8+– Rc8 21.Nf7 Kg8 22.Nd6 Kh8 1–0. DEFFM – GuestZTHK, freechess.org, 2019.

8.a4 b6= 9.0–0 Bb7 10.d4 (10.d3 a6=) 10...Nbd7 11.dc5 (11.Nbd2 Rc8=) 11...Bc5 (11...Nc5 12.Nbd2+=) 12.Nbd2 Rc8 (12...Qe7 13.Qe2=) 13.Qb3 (13.Qe2 Qe7+=) 13...Qe7+= 14.Rfd1 Rfd8 15.Nd4 (15.h3 h6+=) 15...Bd4 (15...Bd6 16.Rac1+=) 16.ed4= Bd5 (16...Nd5 17.f3=) 17.Ba3+= Qe8 18.Rac1 (18.Bd5 Nd5 (18...ed5? 19.Re1 Ne4 20.f3 Nd2 21.Re8 Re8 22.Qd5+–) 19.Nc4 Nf8+=) 18...Nf8= 19.Nf3 (19.Bd5 Rc1 20.Rc1 Nd5=) 19...Ng6 20.Ne5 (20.Bd5!? Nd5 21.g3=) 20...Ne5 21.de5?? (21.Bd5 Rc1 22.Bc1 ed5 23.de5 Qe5+=) 21...Bc4 (better is 21...Rc4 22.Rc4 Bc4–+) 22.Rd8–/+ Qd8 (22...Bb3?? 23.Rcc8 (23.Re8 Re8 24.ef6 Ba4+=) 23...h6 24.ef6 Qd8 25.Rd8 Kh7 26.Rd7+–; worse is 22...Rd8 23.Qc4 Nd5 24.h3+=) 23.Rc4 Rc4 24.Qc4 Qd1 25.Qf1 Qf1 (better is 25...Qa4!? 26.ef6 Qa3 27.fg7 Kg7–/+) 26.Kf1+= Nd5 27.Bb2 Kf8 28.g3 Ke8 (28...Ke7 29.Ke2+=) 29.Ke2 Kd7 30.Kd3 Kc7 31.Kc4 (31.Kd4 Kd7+=) 31...Kb7 32.Bd4 (32.h4 a6+=) 32...a6 33.f4 (33.f3 ab5 34.ab5 Kc7+=) 33...ab5 34.ab5 Ne7 35.Bf2 Kc7 36.h3 h5 37.g4 ½–½. De Visser,Arno – Beerens, 1980.

8.Nc3 Nbd7=.

7.Bc4 b6

8.0–0 0–0 9.d3 Bb7 10.Nbd2 Nbd7 11.a4 Nd5 (11...a6 12.Qc2=) 12.Qb3 N7f6 (12...Bf6 13.Ne4=) 13.Rfd1 Nb4 (13...a5 14.d4+=) 14.d4 cd4 (14...Rc8 15.Rac1+=) 15.Bd4 Nbd5 (15...Bd6 16.Rac1+=) 16.e4+– (16.e4 Nf4 17.Qe3+–) 1–0. Luzuriaga,Norberto Horacio(2020) – Von Rosenberg,Clemens (1715), KO–027 VCC, 2002.

8.0–0 0–0 9.Be2 Nbd7 (9...a6 10.Nc3=) 10.d3 (10.d4 Bb7=) 10...Bb7 11.Nbd2 (11.Nc3 a6=) 11...Qc7 (11...a6 12.ba6 Ra6 13.Qb1=) 12.Nc4 (12.Qc2 a6 13.a4 ab5 14.ab5 Bd6=) 12...Rfd8 (12...a6 13.ba6 Ra6 14.Qb3=+) 13.Nfe5= Ne8 (13...a6 14.Qa4=) 14.Bf3 Bf3 15.Qf3 (15.Nf3 a6 16.a4 ab5 17.ab5 Ra1 18.Qa1 Qb7=) 15...Ne5 16.Be5 (16.Ne5 Bf6 17.d4=) 16...Qc8 (16...Qd7!?=+) 17.Rad1 (17.Rfd1 f6 18.Bg3 Qd7+=) 17...f6 18.Bg3 Nd6 (18...Qd7 19.a4+=) 19.a4 (19.Bd6 Bd6 20.d4 Qc7+=) 19...Nf5 (19...e5 20.Nd6 Bd6 21.d4=) 20.Qh5 (20.a5 Ng3 21.fg3 Rb8+=) 20...Ng3= 21.hg3 (21.fg3 Rd5 22.Qf3 Qd7=) 21...Qc7 (21...Rd5 22.Qf3=) 22.Qh3 e5 (22...Qd7 23.Kh2=) 23.Qe6 (23.f4 Bd6=) 23...Kf8 (23...Kh8 24.Rd2=) 24.e4 (24.f4!?+=) 24...Qd7= 25.Qd7 Rd7 26.Ne3 (26.f4 Rad8 27.fe5 Rd3=+) 26...Rad8 (26...Rd4 27.f4=+) 27.Nd5= Kf7 28.Rc1 (28.f4 Rd5 29.ed5 Rd5=) 28...g6 29.g4 g5 (29...h6 30.g3=) 30.f3 Rh8 (30...Rd5 31.ed5 Rd5 32.Rfd1+=) 31.Kf2 Bd6 (31...Kg6 32.Rh1+= (32.Ne7?! Re7 33.Ke3 Rd7=+)) 32.Rh1 Ke6 (32...Kg6 33.Ra1+=) 33.Rh6 (33.Ra1 Rhd8+–) 33...Rf7 (33...Rf8 34.Ra1+–) 34.Rch1+– Bf8 35.R6h5 h6 36.Ke2 Bg7 37.Ne3 (37.g3 Rd7+–) 37...Bf8 (37...Ra8 38.Nf5+=) 38.g3+– Kd7 (38...Bg7 39.Nf5+–) 39.Nd5 Kc8 (39...Kd6 40.a5 ba5 41.Ra1+–) 40.f4 (40.Ra1 Bg7+–) 40...Rg8 (40...Bg7+–) 41.fe5 (better 41.Rf1!? Rgg7 42.fe5 fe5 43.Rf5 Rf5 44.gf5+– (worse 44.ef5 Rd7 45.Nf6 Rc7+=)) 41...fe5+= 42.Rf1 (42.Ne3 Rg6+=) 42...Rf1= 43.Kf1 Kb7 44.Rh2 (44.Ke2 Rh8+=) 44...Bg7 45.Rf2 Rf8 46.Rf8 (46.Rf5 Kc8+=) 46...Bf8= 47.Ne3 Kc7 (47...a6 48.Nc4 ab5 49.ab5=) 48.Ke2 Kd7 49.Kd2 Ke6 50.Kc3 Bg7 51.Kc4 Bf8 52.Nf5 Bd6 53.Nh6 (53.Ng7 Kf6 54.Kd5 Bf8 55.Ne8 Ke7+–) 53...Bf8 (better 53...Be7+–) 54.Nf5+– Bd6 55.Ne3?? (better 55.Ng7 Kf7 56.Kd5+–) 55...Bf8 (better 55...Be7+–) 56.Nf5 Bd6 57.Ng7 (57.Nd6?! Kd6 58.Kb3 Ke7+=) 57...Kd7 (57...Kf7 58.Kd5 Bb8 59.Nf5+–) 58.Kd5 Bf8 (58...Bb8 59.Ne6 Ke7 60.Ng5+–) 59.Nf5 Kc7 (59...Ke8 60.Nd6 Kd7 61.Nf7+–) 60.Ke6 (60.Ke5 Kd7+–) 60...c4 61.dc4 Bc5 (61...Ba3 62.Ke5 Kd7 63.Kf6+–) 62.Ke5 Kd7 (62...Bb4 63.Kf6 Bd2 64.e5+–) 63.Kf6 Bb4 64.Kg5 Ke6 (64...Bc3 65.Kh6+–) 65.Nd4 Kd6 66.Kf5 (66.e5 Kc5 67.Nc6 Ba3+–) 66...Kc5 (66...Kd7 67.e5 Be1 68.e6 Ke8 69.Nc6+–) 67.Nc6 Be1 (67...a5 68.g5 Kc4 69.Nb4 ab4 70.g6+–) 68.e5 Bg3 (68...Bf2 69.g5 Be3 70.Na7+–) 69.e6 (better 69.g5 Bf2 70.g6 Kc4+–) 69...Bd6 (69...Bh4 70.g5 Bg5 71.Kg5 Kc4 72.e7+–) 70.e7 Be7 71.Ne7 Kc4 72.Nc6 (72.g5 Kb3+–) 72...Kc3 73.g5 a6 74.ba6 Kd2 75.g6 Kd3 76.a7 Kc3 77.a8Q Kc4 (77...Kb3 78.g7 Kc2 79.g8Q Kb2 80.Qg2 Kb3 81.Qag8 Kc3 82.Qe2 b5 83.Qg3) 78.g7 b5 (78...Kb3 79.g8Q Kc2 80.Qa2 Kc1 81.Qd8 b5 82.Qdd2) 79.g8Q Kc3 80.ab5 Kd2 (80...Kd3 81.Qga2 Ke3 82.Q8a3) 81.Qaa2 Kc1 (81...Kd3 82.Qg3) 82.Qg1 1–0. Torres Herrero,Fernando – Hernandez Velasco,Jesus, Valladolid, 1990.

8.0–0 a6 9.d4=.

8.0–0 Nbd7 9.a4 Bb7 10.d4 Qc7 11.Nbd2 cd4 12.Bd4 Rd8 13.Rc1 Bc5 14.Qe2 Bf3 15.Nf3 (worse is 15.gf3 Bd4 16.ed4 Qd6–/+) 15...0–0 16.Bb2 Bd6? (better is 16...e5!?+=) 17.Be6!+– Qc1? (17...fe6 18.Qc4 Double attack (18.Rc7 Discovered attack; 18.Qc4 Decoy)) 18.Bf7! Kf7 (18...Rf7 19.Bc1 Zwischenzug; 18...Kf7 19.Ng5 Double attack (19.Bc1 Zwischenzug)) 19.Rc1 Bc5 20.Ng5 Kg8 21.Rd1 h6 22.Qc4 Kh8 23.Bf6 Rf6 (23...Ne5 24.Nf7! Nf7 25.Bd8 Nd6+–) 24.Nf7 Rf7 25.Qf7 Kh7 (25...Rf8 26.Qd7 Bb4 27.Qa7+–) 26.Rd7 (26.Rd7 Rd7 27.Qd7+–) 1–0. b4_player – ksew, casual, 2013.

8.0–0 Bb7

9.d3!?

9.d4 0–0+=.

9.d4 Nbd7 10.Nc3 0–0 11.Ng5 (11.d5 ed5 12.Nd5 a6=) 11...h6 (11...Rc8 12.Be6 fe6 13.Ne6=) 12.Nh3 (12.Nf3 cd4 13.Nd4 Rc8=) 12...Rc8 (12...Qc7 13.Rc1=) 13.Bd3 (13.Rc1 cd4 14.Qd4 Qc7=) 13...cd4=+ 14.ed4 Nd5 (14...Rc7 15.Rc1=+) 15.Qf3 (15.Nd5 Bd5 16.Nf4 Bb7=) 15...N7f6 (15...Qc7 16.Ne4=+) 16.Be4 (16.Nd5!? Qd5 17.Qd5 Nd5 18.Rac1=+) 16...Ne4–/+ 17.Ne4 Rc2 (17...Qd7 18.Qe2–/+) 18.Rab1–+ Qa8 (18...Qc7 19.Rbc1 Rc8 20.Ng3–+) 19.Qd1 (19.Rfc1 Nb4 20.d5 ed5–/+) 19...Rfc8–+ 20.Re1 Nb4 21.d5 (21.f3 Na2 22.Re2 R2c7–+) 21...Nd5 (21...Bd5 22.Qg4 Rb2 23.Rb2 Nd3–+) 22.Qg4–/+ Threatening mate... how? 22...Rb2 (22...g6 23.Qg3 Nb4 24.Bd4–/+) 23.Rb2 f5 24.Qg6 fe4 25.Qe6 Kh8 26.Qe4 Bf6 27.Rb3 Nc3 28.Qg4 (28.Qg6 Be4 (28...Na2? 29.Rbe3 Nc3 30.Re8 Re8 31.Re8 Qe8 32.Qe8 Kh7 33.Nf4+–) 29.Qg4 Bd5–+) 28...Bd5 (28...Re8 29.Re3 Re3 30.fe3–+) 29.Ra3 Nb5 (29...Re8 30.Rf1 Re4 31.Qg6–+) 30.Rd3 (30.Rae3 Nd4 31.Nf4 Rd8–/+) 30...Ba2 (30...Re8 31.Re8 Qe8 32.Re3–+) 31.Nf4 (31.Rde3 Nd4 32.Qh5 Qb7–+) 31...Bf7 (31...Re8 32.Rde3 Re3 33.Re3–+) 32.Qf5 (32.Qd7 Be8 33.Qg4 Bc6–+) 32...Qc6 (32...Re8 33.Rde3 Re3 34.Re3–+) 33.Nh5 (33.Rd7 Re8 34.Re8 Be8–+) 33...Bh5 (33...Re8!? 34.Re8 Qe8 35.Re3–+) 34.Qh5 a5 35.Rde3 Kh7 36.h3 (36.Qf5 g6 37.Qf4 Nd4–+) 36...a4 (36...Nd4 37.Qg4–+) 37.Re8 (37.Re6 Qc5 38.Qg4 Rf8 39.Qe4 Kh8–+) 37...Re8 38.Re8 a3 39.Qf5 (39.Re2 Qc1 40.Kh2–+) 39...g6 40.Re7 Bg7 (better 40...Be7 41.Qf7 Kh8–+) 41.Qe5–/+ Threatening mate: Qxg7 41...Qc3 42.Rg7 (42.Qb5?? a2 43.Ra7 a1Q 44.Ra1 Qa1 45.Qf1 b5 46.Qa1 Ba1–+) 42...Kh8 43.Rg8? (better 43.Re7 Qe5 44.Re5–/+) 43...Kg8–+ Do you see the mate threat? 44.Qb5 Qb2 (better 44...Qe1 45.Kh2 Qe6–+) 45.Qe8=+ Kg7 (45...Kh7 46.Qe7 Qg7 47.Qa3=) 46.Qe7 Kh8 47.Qf8 (47.Qd8 Kh7 48.Qe7 Qg7 49.Qa3 Qd7=+) 47...Kh7 48.Qe7 Qg7 49.Qa3 Qb7 (49...Qd7 50.Qb3 b5 51.Kf1=) 50.Qb4 Kg7 (50...b5 51.Kf1=) 51.Kf1 (51.Qd4 Kg8=) 51...Kf7 (51...b5 52.h4=) 52.Qf4 Kg7 53.Qe5 Kf7 54.Qf4 Kg7 55.Qe5 Kh7 56.Ke2 (56.Qb5 Qc7=) 56...Qa6 (56...b5 57.Kd3=) 57.Kd2 Qa4 (57...Qa2 58.Ke1 Qb1 59.Ke2 Qc2 60.Kf3 Qd1 61.Qe2=) 58.Ke2 (better 58.Qc7!? Kg8 59.Qb6+–) 58...Qc2 (58...Qc6 59.g4=) 59.Ke1 (better 59.Kf3=) 59...Qc5 (better 59...Qc6=) 60.Qc5+– bc5 61.Kd2 g5 (61...Kg7 62.Kc3+–) 62.Kd3 Kg6 63.g4 (better 63.Kc4+–) 63...Kf6= 64.Ke4 c4 (better 64...Ke6!?=) 65.Kd4+– c3 (65...h5 66.gh5 Kg7 67.Kc4 Kh6+–) 66.Kc3+– Ke5 67.Kd3 Kf4 68.Ke2 Ke4 69.f3 Kf4 70.Kf2 Ke5 71.Ke3 Ke6 (71...Kd5 72.f4 gf4 73.Kf4+–) 72.f4 gf4 73.Kf4 Kf6 74.h4 Kg6 75.Ke5 Kg7 76.h5 Kf7 77.Kf5 Kg7 78.Ke6 Kg8 79.Kf6 Kh7 80.Kf7 Kh8 81.Kg6 Kg8 82.Kh6 Kh8 83.Kg6 (better 83.g5 Kg8 84.g6+–) 83...Kg8 84.h6 Kh8 85.g5 Kg8 86.h7 (86.Kf6 Kh7 87.g6 Kh8 88.g7 Kh7 89.Kf7 Kh6 90.g8Q Kh5 91.Qg3 Kh6 92.Qg6) 86...Kh8+– 87.Kf7 Kh7 88.g6 (88.g6 Kh8 89.g7 Kh7 90.g8Q Kh6 91.Qg6) 1–0. Zbynek,J – Muller,Johannes, Schneider Bohemia op–C, 2000.

9.d4 Nbd7 10.Nc3 a6 11.ba6 Ba6 12.Ba6 Ra6 13.Qe2+=.

9.d4 Nbd7 10.Qe2 Rc8=.

9.Be2 0–0 10.a4 Nbd7 11.d4 cd4 12.Bd4 Nc5 13.Nbd2 Rc8 14.Qb1 Nce4 15.Qb2 Nd2 16.Nd2 Qc7 (16...Bc5 17.Bc5 Rc5 18.Rac1=) 17.Rfc1+= Qb8 (17...Qd6 18.Nc4 Qb4 19.a5 Qb2 20.Nb2+/–) 18.Nc4+/– White prepares a5 18...Rcd8? (better is 18...Bd5!?+/–) 19.a5+– Bc6?? (better is 19...Rd4 20.Qd4 Nd5 21.ab6 ab6+–) 20.bc6 (20.bc6 ba5 21.Qb7 Rd4 22.ed4+–) 1–0. pierred – anony, internet, 2015.

9.Be2 0–0= 10.d4 Nbd7 11.Nbd2 (11.Qc2 Rc8 12.Nc3 Bf3 13.Bf3 cd4 14.ed4 Qc7=) 11...Rc8 (11...a6 12.ba6 Ba6 13.dc5 Nc5 14.Nc4=) 12.Rc1 Ne4 (12...Bd5 13.Qa4=) 13.Ne4+= Be4 14.Nd2 (better is 14.Qa4 Bd5 15.Rfd1+= (15.Qa7?? Ra8 16.Qa6 Ra6 17.ba6 Qa8–+)) 14...Nf6? (better is 14...Bg6!?=) 15.dc5+/– Bd5 (15...Bf5 16.c6+/–) 16.c6+– Qd6 (16...Bb4 17.a3 Ba5 18.Nc4+–) 17.a4 (17.Qc2!? Rfd8 18.Rfd1 Qc5+–) 17...Rfd8 18.Nf3 (18.Nc4 Qb8 19.Qc2 Be4+–) 18...Qc7+/– 19.Be5 (19.Qc2 Be4 20.Qc4 Bd5+–) 19...Bd6 (19...Bf3 20.Bc7 Rd1 21.Bd1 (worse is 21.Rcd1 Be2 22.Be5 a6–/+) 21...Bd1 22.Rfd1 Rc7 23.Kf1+=) 20.Bd6 Rd6 21.Qc2 Bf3 (21...a6!?+/–) 22.Bf3+– Rcd8 (22...e5 23.Rfd1+–) 23.Rfd1 g6 (23...Rd1 24.Rd1 Rd1 25.Qd1+–) 24.h3 (24.Rd6 Rd6 25.Qc3 Nd5 26.Bd5 Rd5+–) 24...Kg7 (24...e5 25.Rd6 Rd6 26.Qc4+–) 25.Rd6 White begins to deal mighty blows 25...Rd6 26.Rd1 Ne8 (26...Rd1 27.Qd1 e5 28.Bd5+–) 27.Rd6 Qd6 (27...Nd6 28.Qc3 f6 29.Qb3+–) 28.Qc3 (28.Qd1 Qd1 29.Bd1 Nc7+–) 28...Kf8 (28...e5 29.Be4+–) 29.Qh8 Ke7 30.Qh7 Qe5 (30...Qb4 31.g4 Qa4 32.Qh4 Kf8 33.c7 Nc7 34.Qd8 Kg7 35.Qc7 Qb5 36.Qa7+–) 31.Qh4 Nf6 (31...g5 32.Qd4 Qd6 33.Qd6 Kd6 34.g3+–) 32.Qb4 Ke8 (32...Qc5 33.Qc5 bc5 34.a5+–) 33.Qd4 Qc7 (33...Qd4 34.ed4 g5+–) 1–0. Wilting – Clausen, Bocholt, 1969.

7.Bc4 Nbd7

8.0–0 0–0 9.Qc2 Nb6 10.Be2 Nbd5 11.d4 b6 12.Nc3 Bb7 13.Nd5 Bd5 14.dc5 Bc5 15.Ng5 g6 16.Bf3 (16.Qc3 h6 17.e4 Bb7+/–) 16...Nh5? (better is 16...Rc8 17.Qa4 h6+=) 17.Qc3+– f6 18.Bd5 (better is 18.Rad1 Qe7 19.Rd5 ed5 20.Bd5 Kg7 21.Ne6 Kh8 22.Nf8 Rf8 23.Rd1+–) 18...Qd5= 19.Nf3 Qd7 20.a4 Rac8 21.Qb3 Qe7 22.Rfd1 Rfd8 23.Rac1 Qf7 24.Nd4 Bd4 25.Rc8 (worse is 25.Bd4 e5 26.Qf7 Kf7 27.Rc8 Rc8=) 25...Rc8 26.ed4 (worse is 26.Bd4 e5 27.Qf7 Kf7=) 26...Nf4 27.g3 Nd5 28.Re1 Qd7 29.Rc1 Rc1 ½–½. Toth,Tamas (1990) – Balsai,Nikolett (1905), HUN–chT2 Maroczy, 2007.

8.0–0 0–0 9.Qc2 Qc7 10.Bd3 (10.Rc1 Bd6=) 10...h6 11.Na3 b6 12.Nc4 (12.e4 a6=) 12...Bb7 13.Nfe5 Ne5 14.Be5 Qd7 15.Rfb1 Qd5 (15...Rfd8 16.Rb3=) 16.f3 Nd7?? (better is 16...Rfd8 17.Be2 Qd7=) 17.Bh7+– Kh8 18.Be4 (18.Be4 Qc4 19.Bg7 (19.Qc4?! Ne5 20.Qc2 Be4 21.Qe4 Bf6+–) 19...Kg7 20.Qc4 Be4 21.fe4+–) 1–0. marre – oppo, internet, 2010.

8.0–0 Nb6 9.Be2 Bd7=.

8.a4 b6 9.0–0 Bb7 10.d3 Qc7 (10...a6 11.Na3=) 11.Nbd2 (11.a5 0–0+=) 11...0–0 12.e4 (12.Qc2 a6=) 12...Ng4 (12...a6 13.Qc2=) 13.h3 (13.a5 ba5 14.Qa4 a6 15.Qa5 Qa5 16.Ra5 ab5 17.Rb5 Bc6=) 13...Nge5 14.Qc2 (14.a5 Bf6 15.Ne5 Be5 16.Be5 Ne5+=) 14...Nf3 (14...Nc4 15.Nc4 a6 16.Nfe5=) 15.Nf3 Bf6 (15...a6 16.Rfd1=) 16.Rae1 (16.Bf6 Nf6 17.a5 Rab8=) 16...Bb2= 17.Qb2 Qf4 (17...Rfd8 18.Rc1=) 18.Re3 (18.Qc1 Qd6=) 18...Kh8 (18...Rfd8 19.Qc3=) 19.g3 (19.Rc1 Rfd8=) 19...Qh6 20.Nh4 (20.Kh2 a6=) 20...Qf6 (20...a6!?+=) 21.Qf6+= Nf6 22.f4 (22.a5 Rad8+=) 22...g6 (22...a6 23.Rb1+=) 23.Kh2 (23.a5 Rad8+/–) 23...Kg7 (23...a6 24.g4+=) 24.a5 Rfe8 (24...a6!? 25.ba6 Ba6 26.ab6 Nd7+=) 25.a6+/– Bc8 26.g4 Bd7 27.Ref3 (27.g5 Nh5+/–) 27...Rf8 (27...Rad8 28.g5 Ng8 29.d4+/–) 28.g5 (28.Kg3 Ne8+=) 28...Ne8 29.e5 Nc7 30.Rb1 Rad8 31.Ng2 (31.Kg3 Nd5+=) 31...Nd5 32.h4 (32.Ne3 h6+=) 32...h5 33.Ne3 ½–½. Borrmann,Fritz – Vaeino,Klaus, corr, 1987.

8.a4 Nb6 9.Be2=.

8.Nc3 0–0 9.0–0 Qc7 10.a4 b6 11.Re1 Bb7 12.Be2 Rad8 13.d4 Qb8 (13...Bd6 14.h3=+) 14.Qc2 Bd6 15.h3 Qa8 16.Red1 Ne4 (16...cd4 17.Rd4 Ne5 18.Rd6 Nf3 19.Bf3 Rd6 20.Bb7 Qb7 21.Ba3=) 17.Ne4 (17.a5 ba5 18.Ra5 cd4 19.Rd4 f5+=) 17...Be4 18.Qc3 Nf6 19.dc5 Bc5 20.Ne1 Rd1 21.Rd1 Rd8 22.Qc1 Rd1 23.Qd1 Qd5 24.Nf3 (24.Bf6 gf6 25.Bd3 f5=) 24...Nd7 25.Qd5 Bd5 26.Bd1 f6 27.Nd4 Ne5 28.Nb3 Nd3 29.Bc3 (29.Nc5? Nb2 (29...Nc5?! 30.Ba3=; 29...bc5?! 30.Bc3=) 30.Ne6 Nd1–+ (30...Be6?! 31.Bc2–+)) 29...Bb4 (29...e5 30.Nc5 bc5 31.Bg4=+) 30.Bb4= Nb4 31.Nd2 Kf7 32.Bb3 (32.e4 Bb7=) 32...Ke7 33.f3 (33.Kf1 e5 34.Bd5 Nd5=) 33...Kd6 (33...Bb3 34.Nb3 Nd5 35.Nd4–/+) 34.Kf1 (better 34.Bd1!?=) 34...Bb3–/+ 35.Nb3 Nd5 36.Ke2 Nc3 37.Kd3 Na4 38.Kc4 e5 39.Nd2 (39.e4 Nc5 40.Nd2 g6–/+) 39...Nc5 (39...Nb2 40.Kb4–/+) 40.e4 h5 41.g3 g5 42.Kc3 (42.h4!?–/+) 42...Ne6–+ 43.Kc4 Nd4 44.Kb4 (44.f4!?–/+) 44...Ne2–+ 45.g4 (45.Nf1–+) 45...h4 46.Nc4 Ke6 47.Nd2 Nf4 48.Kc4 Nh3 49.Nf1 Ng1 50.Nh2 Kd6 51.Kb4 Ne2 52.Kc4 Nd4 53.Kb4 Nc2 (53...Kd7 54.Ka4–+) 54.Kc4 Ne3 55.Kb4 (55.Kd3 Ng2 56.Kc4–+) 55...h3 56.Kb3 Kc5 57.Ka4 Kc4 0–1. Florea,Dorina (1950) – Baciu,Otilia (2110), ROM–ch (Women), 2007.

6.Be2 Nbd7

7.0–0 b6 8.c4 dc4 9.Bc4 Bb7 10.d4 0–0 11.Qe2 Qc7 12.Nbd2 Rfd8 13.Rfd1 cd4 14.Nd4 Nc5 15.Rac1 Rac8 16.N4b3 Nb3 17.Bb3 Qb8 18.Nc4 Rd1 19.Rd1 Rd8 20.Be5 Qa8 21.f3 Rd1 22.Qd1 Nd5 23.e4 Bc5 24.Kh1 Ne3 (24...Ne7!?+/–) 25.Ne3 Be3 26.Be6! Qe8 (26...fe6 27.Qd7) 27.Bc4 Bc5 28.Qa1 Bf8 29.a4 Qe7 30.Qc3 Qg5 31.Bb3 Bc5 32.a5 Qh4 33.a6 (< 33.Bg7 Bd6 34.g3 Bg3+=) 33...Bc8 34.g3 Qh3 35.Qd3 Be6 36.Be6 Qe6 37.Qd5 Qe8 38.Bd6 Bd6 39.Qd6 f6 40.Qd5 Kf8 41.Kg2 g5 42.h4 gh4 43.gh4 Kg7 44.Kf2 Kh6 45.Qd6 Qb5?? 46.Qf6 Kh5 47.Qg7 1–0. marekt – Brother_9, ChessWorld.net, 2003.

7.0–0 Bd6=.

7.a4 0–0 8.0–0 b6 (8...Qc7 9.c4=) 9.d3 Bb7 10.Nbd2 Qc7 11.c4 Rad8 (11...a6 12.ba6 Ra6 13.cd5 ed5 14.d4=+) 12.Qb3 e5 13.d4 (13.cd5 Bd5 14.Qc3 Be6=) 13...cd4=+ 14.ed4 e4 (14...ed4 15.Bd4 Nc5 16.Qc2=) 15.Ne5= ½–½. Lagvilava,Genrieta (2275) – Kovalevskaya,Ekaterina (2350), Svetlogorsk op (Women), 1997.

7.0–0 0–0

8.a4 Qc7 9.c4 dc4 10.Na3 b6 11.Nc4 Bb7 12.Qc2 Rfd8 13.Nfe5 Nf8 14.f4 Be4 15.d3 Bd5 16.e4 Bb7 17.Rf3 Ng6 18.f5 ef5 19.Rf5 Bc8 20.Rf2 Be6 21.Nc6 Bd6? (better is 21...Bc4 22.Qc4 Rd6+/–) 22.e5+– (22.e5 Ne5 23.N4e5+– (worse is 23.N6e5 Bc4 24.Nc4 Bh2 25.Kh1 Nd5+–); 22.Nd8?! Bh2 23.Kh1 Rd8 24.Bf6 gf6+/–; 22.Bf6 Bh2 23.Kh1 gf6 24.Nd8 Rd8+=; 22.Nd6?! Rd6 23.e5 Rc6 24.ef6 Rd6+–) 1–0. Jaramillo,Carlos Orlando (1940) – Suarez,Alexandra, Manizales op, 2009.

8.c4 (--> 6.c4 0–0 7.Be2 Nbd7 8.0–0).

Play 1.b4 at Chessworld.net!

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    Available lines:
  • 1.b4 (4 players, 1 day/move)
  • 1.b4 (4 players, 10 days/move)
  • 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 (4 players, 3 days/move)
  • 1.b4 e5 2.Bb2 Bb4 3.f4 ef4 4.Bg7 Qh4 5.g3 fg3 6.Bg2 gh2 7.Kf1 hg1Q 8.Kg1 (Kucharkowski-Meybohm gambit, 6 players, 10 days move)
  • 1.b4 e5 2.Bb2 f6 3.e4 Bb4 4.Bc4 (Sokolski gambit, 4 players, 3 days/move)
  • 1.c4 Nf6 2.b4 (English orangutan, 4 players, 3 days/move)
  • 1.e4 c5 2.b4 (Sicilian: Wing gambit, 4 players, 10 days/move)
  • 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4 (French: Wing gambit, 4 players, 3 days/move)

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