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TESTA500 Release 2021-06-09
Send your 1.b4 games to me, please. Thank you! /Marek
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(c) Marek Trokenheim

1.b4 a5 2.b5 Nf6

(...)

3.a4 b6 (--> 1.b4 a5 2.b5 b6 3.a4 Nf6).

3.a4 c5 4.Bb2 c4 5.e3+= d5 6.Nf3 e6 7.d3 Bb4 (7...cd3!? 8.Bd3 Bb4 9.Nbd2 0-0=) 8.c3+– Qe7?? (better 8...Be7+–) 9.cb4+– Qb4 10.Bc3 Qc5 (10...Qe7 11.dc4 0-0 12.cd5 Nd5 13.Bd3+–) 11.dc4 dc4 12.Nbd2 0-0 13.Bc4 Rd8 14.Qb3 (14.Bf6 gf6 15.Rc1 Qf5+–) 14...Nbd7 15.Bd4 Qc7 (15...Qe7 16.Qa3 Qa3 17.Ra3+–) 16.0-0 Nc5 17.Bc5 (17.Qc2 Qe7+–) 17...Qc5 18.Rfd1 b6 (18...Bd7 19.Rac1+–) 19.Nd4 (19.Ne4 Rd1 20.Rd1 Qc7 21.Nf6 gf6+–) 19...Bb7 20.Be6 Kh8 (20...fe6 21.Ne6 Qc8 22.Nd8 Bd5 23.Nc6 Bb3 24.Ne7 (24.Nb3?! Qe6 25.Nbd4 Qf7+–) 24...Kf8 25.Nc8 Bd1 26.Nb6+– (26.Rd1?! Rc8 27.Kf1 Rc2+–)) 21.Bf7 Qg5 Threatening mate... how? 22.f3 Rd7 23.Ne6 Qh4 24.Nf4 Rad8 (24...g5 25.Ne2+–) 25.Nc4 Qg5 (25...Ne4 26.fe4 Rd1 27.Rd1 Be4 28.Rd8 Qd8 29.Qc3+–) 26.Rd7 (better 26.Ne6!? Rd1 27.Rd1 Rd1 28.Qd1 Qd5 29.Qd5 Bd5 30.Nb6 Ba2+–) 26...Rd7 27.Ne5 (better 27.Nb6 Qe5 28.Re1 Re7+–) 27...Rd8?? (27...Qe5 28.Re1+–) 28.Be6 (better 28.Qe6 Bc8 29.h4 Be6 30.hg5+–) 28...Bf3?? (better 28...Qe5 29.Rc1 g5+–) 29.Nf3 (better 29.Nf7 Kg8 30.Ng5 Kf8 31.gf3+–) 29...Qc5 30.Qc4 (30.Rf1 Ne4+–) 30...Qc4 (30...Qe3 31.Kh1 Ne4 32.Nh3+–) 31.Bc4 Ne4 (31...Re8 32.Rd1+–) 32.Ne6 (better 32.Ne5 g5 33.Nf7 Kg7 34.Nd8 gf4 35.Ne6 Kf6 36.Nf4+–) 32...Ng3 (32...Rc8 33.Ne5+–) 33.Ng7 (better 33.Nd8 Ne4+–) 33...Ne2 (33...Kg7 34.hg3 Re8 35.Kf2+–) 34.Kf2 (34.Be2!? Kg7 35.Rc1 Re8 36.Rc7 Kf6 37.Rc6 Kg7+–) 34...Kg7 35.e4 (better 35.Ke2 Rc8 36.Rc1 Kf6+–) 35...Rd2 (35...Nc3 36.e5 h6+–) 36.e5 (better 36.Nd2 Nf4+–) 36…Nd4 (36...Nd4 37.Nd2 Nf5+–; 36...Rb2 37.Be2 Rb4 38.Rd1+–). RichardSommer (1970) – Fooldan (2070), lichess.org, 2020.

3.a4 c6 (--> 1.b4 a5 2.b5 c6 3.a4 Nf6).

3.Bb2 Nc6?? 4.bc6+– bc6 5.a4 d5 6.Nf3 Ba6 7.d3 e5 (7...e6 8.Nbd2+–) 8.Ne5 Bb4 9.c3 Bd6 10.Nc6 Qd7 11.Nd4 (11.Na5 Bd3 12.Qd3 Ra5+–) 11...Rb8 12.Qc2 0-0 13.Nf3 (13.Nb3 Bb5 14.ab5 Qb5+–) 13...c5 14.e3 Qb7 15.Ba3 Rfe8 16.Be2 d4 (16...Qc7 17.Nbd2+–) 17.e4 (17.cd4!? Nd5 18.dc5 Nb4 19.Bb4 Qb4 20.Nbd2 Bc5+–) 17...Nd7? (17...Ne4 18.cd4 cd4+–) 18.c4 (18.cd4 Rec8 19.Nc3 cd4 20.Bd6 Rc3+–) 18...Ne5 (18...Qc7 19.Nbd2+–) 19.Ne5 (19.Nd4 Nc4 20.dc4 Be5 21.Bc5 Qc7+–) 19...Be5 20.Bc5 Qd7 (20...Rec8 21.Ba3 Bc4 22.0-0+–) 21.Ba3 Rec8 (21...Bb7 22.Nd2+–) 22.0-0 (22.Nd2 Bb7+–) 22...Bc7 (22...Bc4 23.dc4 d3 24.Qd3 Qd3 25.Bd3 Ba1 26.Bd6+–) 23.Nd2 Qe6 24.Nf3 Bb7 25.Nd4 Qh6 (25...Bh2 26.Kh2 Qe5 27.f4 Qd4 28.Bb2+–) 26.f4! Bb6 (26...Bf4 27.Nf3 Combination) 27.c5 Ba6 (27...Qd6 28.Nb3 Qd7 29.Qc3+–) 28.Kh1 (28.Nf5 Qf6 29.Rac1 Bc5 30.Bc5 Rb2+–) 28...Qf6 29.e5 Qc6 (29...Qg6+–) 30.Nc6 Rc6 31.d4 Rbc8 32.Ba6 Bd8 33.Bb5 (better 33.Bc8 Rc8 34.e6 fe6+–) 33...R6c7 34.d5 White plans c6 34...Be7 35.d6 Bd6 36.ed6 Ra7 37.c6 Kf8 38.c7 (38.d7 Kg8 39.dc8Q) 38...f6 (38...g6 39.d7 Kg7 40.dc8Q Ra8 41.Qc3 f6 42.Qd7 Kg8 43.c8Q Rc8 44.Qcc8) 39.Bc5 (39.d7 Kg8 40.dc8Q Kf7 41.Qe8) 39...Kf7 (39...Rac7 40.dc7 Kg8 41.Qf5 h6 42.Qc8 Kh7 43.Qf5 Kg8 44.c8Q Kf7 45.Qf8) 40.Ba7 (40.Bc4 Ke8 41.Rae1 Kf8 42.d7) 40...Ke6 (40...h6 41.Bc4 Kf8 42.Qe4 Rc7 43.Qa8 Rc8 44.Qc8) 41.d7 (41.Qe4 Kd6 42.Rad1 Kc7 43.Qc6) 41...Rc7 (41...Ra8 42.Qe2 Kd6 43.d8Q Rd8 44.cd8Q) 42.Qc7 (42.Qe4 Kd6 43.Rad1) 42...Ke7 (42...Kf5 43.Qc2 Ke6 44.Qe4 Kd6 45.d8Q) 43.d8Q Ke6 44.Bc5 (44.f5) 44...Kf5 45.Qd5 Kg6 46.Qe7 (46.Qcf7 Kh6 47.Qdh5) 46...h5 (46...Kh6 47.Qg5! fg5 48.Qg5) 47.Qe8 Kh6 (47...Kh6 48.Qdh5; 47...Kh7 48.Qdh5) 0–1. alessandrocarvalhaes (1910) – ajrhourh (1835), lichess.org, 2020.

3.Bb2 Nd5 4.e4+= Nb6 5.c4 d6 6.d4 d5 (6...e6!?+=) 7.cd5+/– Nc4?? (Better is 7...a4+/–) 8.Bc4+– g6 (8...Nd7 9.Nc3+–) 9.Nf3 e5 (9...Bg7 10.0-0+–) 10.de5 (10…Bg4 11.0-0+–) 1–0. Taulien,Hans_Juergen – Schley,Martin, remoteschach.de, 2002.

3.c3 d6 4.Bb2 e5 5.c4 d5 (5...Nbd7 6.d4=+) 6.e3 c6 (6...Nbd7 7.cd5 Nd5 8.e4=+) 7.Nf3 (better 7.Be5!? Nbd7 8.Bb2+=) 7...e4=+ 8.Nd4 c5 9.Nc2 d4 (better 9...dc4!? 10.Bc4 Nbd7=+) 10.ed4+= cd4 11.Bd4 Bc5?? (better 11...Be7+–) 12.Bc5+– Nbd7 13.Ba3 (13.Bd4 0-0+–) 13...Ne5 14.Be2 Nd3 15.Bd3 Qd3 16.Ne3 Be6 17.Nc3 0-0-0 (17...Bc4 18.Nf5 0-0-0 19.Rc1+– (worse 19.Ng7 Rhg8 20.Be7 Nd5 21.Nd5 Rd5+–)) 18.Qe2 (18.Be7 Rd7 19.Bf6 gf6+–) 18...Qd4 (18...Rhe8 19.Bc5 Kb8 20.Rc1+–) 19.0-0 (19.Be7 Rd7 20.Bf6 gf6+–) 19...h5 (19...Qd2 20.Qd2 Rd2 21.Be7+–) 20.Be7 Rd7 21.Bf6 gf6 22.Ncd5 f5 (22...h4 23.Rfd1+–) 23.Rac1 f4 24.Nf4 Qg7 (24...Qd2 25.Rc2 Qe2 26.Re2+–) 25.Ned5 Kb8 (25...Qd4 26.Rfe1 Bd5 27.cd5 Rc7 28.Rc3+–) 26.Qe4 Rg8 (26...Bd5 27.Nd5 Rg8 28.Qf4 Ka7 29.b6 Ka6 30.g3+–) 27.Rfe1 (better 27.Nh5 Qg6 28.Qe5 Ka7 29.b6 Ka6+–) 27...f5 (27...Bd5 28.Nd5 h4 29.Qf4 Ka7 30.b6 Ka8 31.g3 hg3 32.hg3+–) 28.Qe5 (28.Qe6 h4+–) 28...Ka8 (28...Qe5 29.Re5 Bd5 30.Nd5 Rf7+–) 29.Qg7 (better 29.Qe6 Rgd8 30.Qb6+–) 29...Bd5 (29...Rgg7?? 30.Ne6 b6 31.Nb6 Kb8 32.Ng7 Rg7 33.c5+–) 30.Qg8 (30.Qd7 Be4 31.d3 Bc6 32.bc6 Rb8 33.Qc7 bc6 34.Re7 Rb2 35.Qa7) 30...Bg8 31.Re8 Ka7 32.Rg8 Rd2 33.c5 a4 34.b6 (34.Rb1 b6 35.c6 Rd4 36.Re1 Re4 37.Re4 fe4 38.c7 e3 39.c8Q ef2 40.Kf2 h4 41.Qd7) 34...Ka6 35.Ne6 (better 35.Rb1 Rd1 36.Rd1 Kb5 37.Rb1 Kc4+–) 35...Kb5 36.a3 Ra2 37.Nc7 (37.Nd4 Ka5 38.Ra8) 37...Kc6 38.Rg6 (38.Rd8 Rd2 39.Rd2 h4 40.Rd6) 38...Kd7 39.Rd1 Ke7 (39...Rd2 40.Rd2 Ke7 41.Re6 Kf8 42.Rd7 h4 43.Re8) 40.Re6 Kf7 (40...Kf8 41.Rd8 Kf7 42.Rd7 Kf8 43.Re8) 41.Rd7 (41.Rd7 Kf8 42.Re8) 1–0. BeepBeepImAJeep (2585) – tactical_abyss (2005), lichess.org, 2017.

3.Nc3 e5 4.e4 Bc5 5.a4 0-0 6.Nf3 (6.Bc4 d6+=) 6...d5 (6...Ng4 7.d4 ed4 8.Nd4–/+) 7.ed5+= Nd5 8.Nd5 (8.Ne5? Bf2 9.Kf2 Nc3–+) 8...Qd5 9.c4 Qd6 10.d3 Bf5 11.Be2 Nd7 12.Bb2 Rfe8 Black prepares the advance e4 13.0-0 f6 14.Bc3 e4 (14...Nf8 15.Ra2=) 15.de4= Be4 16.Qd6 Bd6 17.Rfe1 Nc5 18.Nd2 f5 19.Ne4 Ne4 (worse is 19...Re4 20.Bf3 Re1 21.Re1 Na4 22.Bb7+=) 20.Bd4 Bb4 21.Rec1 Nd2–/+ 22.Bf3 Nf3 23.gf3 Re2 24.Bc3 Bc3–/+ 25.Rc3 Rd8 26.Rcc1 Rdd2 27.Rf1 Rc2 28.Rac1 Kf7 29.Kg2 Ke6 30.Kg3 Ke5 31.h3 g5 32.Rce1 h6 33.Rc1 Kd4 34.Rc2 Rc2 35.Rd1 Kc4 36.Rd7 Kb4 37.Rd4 Rc4 38.Rc4 Kc4 39.f4 c5 40.fg5? hg5–+ 41.f4 gf4 42.Kf4 Kd4 43.Kf3 c4 44.Ke2 Ke4 45.h4 f4 46.h5 Kf5 0–1. Wright,David – Newberry,Brian, USCF/WS/06WM17, 2006.

3.Nc3 g6 4.Bb2 Bg7 5.e3 0-0 6.Nf3 a4 7.a3 c6 8.Rb1 c5 9.Bc4 (9.d4 cd4 10.Qd4 d5=) 9...b6 (9...d5 10.Ba2=) 10.0-0 (10.Nd5 e6 11.Nf6 Bf6+=) 10...d5= 11.Be2 Nbd7 12.h3 (12.d4 c4=) 12...e5 13.d4 e4 (13...cd4 14.ed4 e4 15.Ne5=) 14.Ne5 c4 (14...Qc7 15.Nc6 Bb7 16.dc5 Bc6 17.cb6 Nb6 18.bc6 Qc6 19.f3=) 15.Nc6 (15.f3 Qc7+/–) 15...Qe8= 16.f3 Bb7 (better is 16...ef3!? 17.Bf3 Nb8+=) 17.fe4+/– Ne4 18.Nd5 c3?? (better is 18...Nd6 19.Bc1 Rd8+–) 19.Nc7 Qc8 20.Ne7 (20...Kh8 21.Nc8 Rac8 22.Bc1 Rc7 23.Rb4+–) 1–0. ppramanik (2490) – sagaz (2470), net–chess.com, 2006.

3.c4 c5 (--> 1.b4 a5 2.b5 c5 3.c4 Nf6).

3.c4 d6 4.e3 g6 5.Bb2 Bg7 6.Nf3 0-0 7.d4 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 g6 5.d4 Bg7 6.Nf3 0-0 7.c4).

3.d3 a4 4.g3 (4.Nf3 d5=) 4...c6=+ 5.c4 cb5 6.cb5 Qa5 (6...d5 7.Bg2=+) 7.Bd2 Qb5 8.Bg2 (8.Nc3 Qa5=+) 8...e6 9.Nc3 Qe5 (9...Qa6 10.Rb1=+) 10.Nf3 (10.Na4 Qc7=) 10...Qc7 (10...Qa5 11.0-0=+) 11.Nb5 Qd8 12.Rc1 Na6 (12...Nc6 13.0-0=) 13.0-0 Be7 14.Qa4 0-0 15.Qc2 (15.Rc2 d5=) 15...Nb4 16.Qc7 (16.Qb3!? Nc6 17.Rc2=) 16...Na2 (16...Qc7 17.Rc7 Nc6 18.Bg5–/+) 17.Ra1 Ra4?? (17...Qc7 18.Nc7 Ra4 19.Rfb1=+) 18.Qd8?? (better 18.Qc2 Ra6 19.Ra2+–) 18...Rd8=+ 19.Nc3 (19.Rfc1 Nc1 20.Ra4 Nb3=+ (worse 20...Ne2 21.Kf1+=)) 19...Nc3–/+ 20.Bc3 Ra1 21.Ra1 Nd5 (21...d5 22.Ra7–/+) 22.Ba5=+ b6 23.Bd2 Bb7 24.Ra7 Bc6 25.Ne5 Bd6 26.Bd5 (26.d4 Ne7=+) 26...ed5 (26...Be5 27.Bc6 dc6 28.Kg2–/+) 27.Bf4 (27.d4 f6 28.Nd3 Re8=+) 27...Be5 (27...f6 28.Nf7 Bb8 29.Rb7 Kf7 30.Rb8 Rb8 31.Bb8=+) 28.Be5 Re8 29.Bd4 (29.d4 f6 30.Bc7 b5=+) 29...Re2 30.Rc7 (30.Bb6 Rb2 31.Bc5 d4–/+) 30...h6–/+ 31.Bb6 d4! 32.Bd4?? (32.Bd4 Re1 Mate attack) 32…Re1 0–1. alaindubleu (1700) – mosa1903 (1930), lichess.org, 2016.

3.d3 c6 4.c4 cb5 5.cb5 e5 (5...d5 6.Nf3=+) 6.a4 (6.Nf3!?=) 6...d5=+ 7.Bb2 d4 8.Ba3 (8.Nf3 Bb4 9.Nbd2 Qe7=+) 8...Bb4 (8...Bd6 9.Nf3–/+) 9.Bb4=+ ab4 10.Qb3 (10.Nf3 Nbd7=+) 10...Qd6 11.Nd2 Be6 12.Nc4 Bc4 13.Qc4 0-0 14.Rb1 (14.g3 Nbd7 15.Bg2 Rfc8–+) 14...Nbd7 (14...Ra4!? 15.Nf3 Nbd7–+) 15.Qb4–/+ Qd5 (15...Qb6 16.Nf3–/+) 16.f3? (16.Ra1!?=+) 16...Rfc8 (16...Qa2 17.Qb2 Qa4 18.g3–+) 17.Qb3 (17.Ra1 Nc5 18.g3 Qd6–+) 17...Qc5 (17...Rc1! 18.Kf2 Rb1 19.Qb1 Ra4 20.Nh3–+) 18.g3–/+ Rc7 (18...Qd6 19.Ra1–/+) 19.Bh3 Rac8 (19...Nb6 20.Ra1–/+) 20.Bd7 Nd7 21.Nh3 Qc1 (better 21...Qd6 22.0-0 Nc5=+) 22.Rc1+– Rc1 23.Kf2 (23.Kd2 Nc5 24.Qa2 Rh1+–) 23...Rh1+= 24.Kg2 (24.Ng5 Rh2 25.Ke1 Rh1 26.Kd2+–) 24...Rhc1? (better 24...Re1 25.Qa2 h6=) 25.Ng5+– Rf8 26.a5 (26.Qd5 Nc5+–) 26...h6 27.Ne4 Kh7? (better 27...Nf6+–) 28.Qd5+– Rd8 (28...f5 29.Nd6 b6 30.Nc4+–) 29.Qb7 (29.Qf7 Rc2+–) 29...Rc2 30.Kf2 (better 30.Kh3 Kg8+–) 30...Kg8? (30...f5 31.Nd6 Nc5+–) 31.a6 Nc5 (31...Kf8+–) 32.Nc5 Rc5 33.a7 Rcc8 (33...Kh7 34.b6 Ra5 35.Qb8 Rb8 36.ab8Q+– (36.ab8R?! Kg6+–; worse 36.ab8B Rb5=+)) 34.b6 (34.b6 f6 35.Qc8 Rc8 36.b7+–) 1–0. lindsey000 – loungesport, gameknot.com, 2018.

3.d3 d5 4.Nf3 e5 5.Ne5 Bd6 6.Bb2 0-0 7.e3 Re8 8.Nf3 Bd7 9.d4 a4 10.a3 c6 11.bc6 Nc6 12.Nc3 Qb6 13.Rb1 Qa5 14.Qd2 Qb6 15.Bd3 Bg4 16.Nb5 Be7 17.0-0 Ne4 18.Qe1 Bf3 19.gf3 Ng5 20.Qd1 Nb8 21.f4 Ne4 22.Qh5 g6 23.Qe2 Nd7 24.c4 Nef6 25.f5 dc4 26.Bc4 gf5 27.Qf3 Rac8 28.Bd3 Kh8 29.d5 f4 30.Bf5 fe3? (30...Rcd8 31.d6! Rg8 32.Kh1 Bd6 33.Nd6 Qd6 34.Bd7 Rd7+–) 31.Bd7 Rg8 32.Kh1 Rc2 33.Bd4 e2 34.Bb6 ef1R 35.Rf1 Nd7 36.Qf7 Bf6 37.Qd7 Rd2 38.Nd6 h6 39.Nf7 Kh7 40.Ng5 Kg6 41.Qf7 Kf5 42.Qe6 Kg6 43.Qg8 Kh5 44.Qe8 Kh4 45.Nf3 Kg4 46.Qe4 Kh5 47.Rg1 Rd5 48.Qg4# 1–0. Green Light Chess v2.15c – DeepPatzer351, computer chess game, 2001.

3.d4 b6 4.Nf3 (4.e3 Bb7=) 4...e6 5.Bg5 h6 6.Bf6 Qf6 7.e3 (7.c3 Bb7=) 7...Bd6 (7...Bb7 8.Nbd2=) 8.Bc4 (8.Bd3 Bb7+=) 8...0-0= 9.a4 (9.0-0 Be7=) 9...c5 (9...Bb7 10.Nbd2=) 10.Nbd2 (10.bc6 Nc6 11.0-0 Bb7=) 10...Qg6 (10...Bb7 11.c3=) 11.g3 (11.Nh4 Qf6 12.Ne4 Qe7 13.Nd6 Qd6=) 11...Bb7 (11...cd4 12.Nd4 Bb7 13.Bd3=) 12.0-0 (12.Bd3 Qh5=) 12...cd4 13.Nd4 (13.Bd3 f5 14.Nc4 Bc7 15.ed4 d6=) 13...Bb4+= 14.Re1 (14.Bd3 Qf6+=) 14...d5–/+ 15.Bb3 (15.Bd3 Qf6–/+) 15...e5 (15...Nd7 16.c4 dc4 17.Bc4–/+) 16.N4f3 (16.Ne2 Nd7+=) 16...Nd7–/+ 17.Nh4 Qh7 18.c3 (18.Rc1!?–/+) 18...Bc3–+ 19.Bc2 (19.Rc1 Rac8–+) 19...g6 20.Rc1 Rac8 21.Re2 Rfd8 22.f3 Qg7 23.Nb3 Qf6 24.Rf2 Nc5 25.Nc5 bc5 26.Qe2 d4 27.Ng2 c4 28.Be4 Qe7 29.Bb7 Qb7 30.Qf1 Qe7 31.Ra2 Qb4 32.Rb1 Qc5 33.f4 d3 34.Rd1?! e4 35.Rf2 Bb4 36.f5 c3 37.fg6 fg6 38.Rf6 Qh5 39.Ra1 d2 40.Nf4 Qf3 41.Ne6 Qf1 42.Rff1 c2 43.Nd8 Rd8 44.b6 d1Q 45.b7 Qe2 46.b8Q Rb8 47.Rf2 Qe3 (47...Qe3 48.Kg2 Rd8–+) 0–1. bicycle – slogger, ChessWorld.net, 2007.

3.d4 d5 4.Nf3 =.

3.d4 e6 4.e3 Bb4 5.c3 Be7 6.Nf3 d5 7.Bd3 c6 8.a4 cb5 9.ab5 Qc7 10.Ba3 Ba3 11.Ra3 Nbd7 12.Nbd2 0-0 13.0-0 b6 14.c4 Bb7 15.cd5 ed5 16.Qb1 Rfc8 17.Ra2 Qd6 18.Ng5 h6 19.Ngf3 Rc3 20.Bf5 Re8 21.Rc2 Rc2 22.Qc2 Rc8 23.Qb1 g6 24.Bd3 Kg7 25.Rc1 Rc1 26.Qc1 Ne4 27.h3 f5 28.Qc2 g5 29.Nf1 Kf6 30.N3h2 Qb8 31.f3 Nd6 32.Ng3 Qc8 33.Qb1 Qc3 34.Nf5 Nf5 35.Ng4 Kg7 36.Bf5 Nf6 37.Qc2 Qc2 38.Bc2 Ng4 39.hg4 Bc8 40.Kf2 Kf6 41.Ke2 Ke7 42.Kd2 Bd7 43.Bf5?? Bb5–/+ 44.Bd3 Bd3 45.Kd3 a4 46.Kc3= b5 47.Kb4 Ke6 48.e4 Ke7 49.e5= Ke6 50.g3 Ke7 51.f4 Ke6 52.f5 Kf7 53.Ka3 Ke8 54.f6 Kf7 55.Kb4 Ke6 56.Ka3 ½–½. Baroin,Bernard (2015) – Amir,Jacob, IECG, 2004.

3.e3 c5 4.Nf3 d5 5.Be2 Bg4 6.Bb2 e6 7.0-0 Be7 8.c4 0-0 9.a4 Nbd7 10.d4 cd4 11.Nd4 Be2 12.Qe2 Rc8 13.Nd2 Bb4 14.N4b3 Nb6 15.Rfc1 Qe7 16.c5 Bc5 17.Rc5 Rc5 18.Nc5 Qc5 19.Ba3 (better is 19.Bf6!? gf6 20.Qg4 Kh8 21.Nb3+=) 19...Qc3–/+ 20.Qd1 Ra8 21.Be7 Rc8 22.Bf6 Qf6 23.Rc1 Rc1 24.Qc1 Nc4! 25.g3 (25.Nc4 dc4 Passed pawn) 25...Qb2 26.Qb2 Nb2 27.Nb3 Na4 28.Na5 Nc5 29.Kf1 Kf8 30.Ke2 Ke7 31.Kd2 Kd7 32.Kc3 Ne4 33.Kd4 b6 (33...Nf2?! 34.Nb7 Kc7 35.Na5–+) 34.f3 (34.Nc6 Nf2 35.Ne5 Ke7–+) 34...Ng5 (34...Ng5 35.Nc6 Nf3 36.Kd3 Kd6–+; 34...ba5?! 35.fe4 Kd6 36.e5 Kc7 37.Kc5–+) 0–1. Mely – PeterRs, ChessWorld.net, 2016.

3.Nf3 a4 4.e3 c6 5.c4 cb5 6.cb5 Qb6 (6...d5!?=) 7.Qc2 e6?? (better 7...Qd8+=) 8.Qc8+– Ke7 9.Ba3 d6 10.Ne5 g6 (10...Ne8 11.Nc3 f6 12.Bc4+–) 11.Bd6! Qd6 (11...Qd6 12.Qb7 Double attack; 11...Kd6 12.Nf7 Double attack (12.Nc4 Deflection)) 12.Qb7 Nbd7 (12...Nfd7 13.Qa8 Ne5 14.Qa4 Nd3 15.Bd3+–) 13.Nf7 (better 13.Nc6 Qc6 14.bc6+–) 13...Qb8 (13...Kf7 14.Qa8 Nb6 15.Qc6+–) 14.Qb8 Rb8 15.Nh8 Bg7 16.Ng6! hg6 17.Na3 Ne4 18.Rb1 Ndc5 (18...e5 19.Bd3 Ndc5 20.Bc2+–) 19.Rb4 Kf7 (19...Nc3 20.Rg4 Na2 21.d4+–) 20.d4 Na6 (20...Ra8+–) 21.ba6 Ra8 22.Rb7 Kf6 23.Nc4 Ra6 24.Ne5 Kf5 25.Rg7 Nc3 26.h4 Na2 (26...Ke4 27.Bd3 Kd5 28.Bc4 Ke4 29.Rf7 Ne2 30.Ke2 Rb6 31.f3) 27.Bd3 Kf6 28.Rf7 1–0. viatsch (1845) – venaverme, gameknot.com, 2018.

3.Nf3 Ne4 4.Bb2 d5 5.a4 e6 6.c4 Bc5 7.e3 dc4 8.Bc4 0-0 9.0-0 Nd6 10.Bb3 Bd7 11.d4 Bb4 12.Nbd2 Qe7 13.e4 Rd8 14.e5 Nf5 15.Ne4 c6 16.bc6 Bc6 17.Bc2 Nd7 18.Ned2 Rac8 19.Rc1 Bd2 20.Nd2 Bg2 21.Kg2 Nh4 22.Kh1 Kf8? (22...Qb4 23.Ba1 Ne5 24.Bh7 Kh7 25.Rc8 Rc8 26.de5 Kg8+/–) 23.Rg1 Qb4 24.Rb1 f5? (24...Ne5 25.Rg3 Nc4+–) 25.ef6 Nf6 26.d5 Qd6 27.Ne4 Ne4 (27...Qd5 28.Qd5 Nd5 29.Bg7 Ke8 30.Bb3+–) 28.Be4 ed5 (28...g6 29.Qd4 e5 30.Qe5 Qe5 31.Be5+–) 29.Qg4 de4 30.Qh4 g5 31.Qg5 h6 32.Qf5 Ke7 33.Rg7 Ke8 34.Qf7# 1–0. Bonetti,Shane – MacChess 5.0, 2000.

3.f4 c6 4.e3 d5 5.Nf3 Bf5 6.Be2 Qc7 7.Bb2 Nbd7 8.Nh4 g6 9.g4 g5 10.Nf5 gf4 11.g5 (11...e6 12.Nh4+– (12.gf6?! ef5 13.bc6 bc6+–; 12.Bf6?! Nf6 13.gf6 ef5+–)) 1–0. Flattum,Odd – Grunswig,W, corr ICCF, 1961.

3.f4 d5 4.Nf3 Bf5 5.Bb2 e6 6.e3 Nbd7 7.Bd3 Bc5 (7...Bd3 8.cd3 c6 9.bc6 bc6 10.0-0=) 8.Bf5= ef5 9.0-0 0-0 10.Bd4 Re8 11.Nc3 a4 12.Qe1 g6 (12...Bb4 13.Qg3 Bc3 14.Bc3+=) 13.Qh4 Bd4 14.ed4 Nb6 15.Rae1 Kg7 (15...Ne4 16.Qh3=) 16.Re8 Qe8 17.d3 (17.Re1 Ne4=) 17...Qf8 18.Qf2 Qa3 19.Qd2 h5 (19...Re8 20.Rb1=) 20.h3 Re8 21.Rb1 Nfd7 22.Kf2 Nf6 23.Kg1 Re6 24.Kf1 Qf8 25.Ne2 Qe8 26.Nc3 ½–½. Hilbert,Stephan J – Willoughby,Peter, FICGS, 2017.

3.f4 e5 4.fe5 Ng4 5.Nf3 d6 6.e4 de5 7.d4 ed4 8.Qd4 Qd4 9.Nd4 Bc5 10.c3 0-0 11.Bc4 c6 12.Ba3 Nd7 (12...Ba3 13.Na3 Nf6 14.0-0 Ne4 15.Rae1=) 13.Ne6 (13.bc6 bc6 14.Bc5 Nc5 15.Nc6 Bb7= (15...Ne4 16.Bd5 Ra6 17.Ne7 Kh8 18.Nc8 Rc8 19.0-0+=)) 13...Bf2 (13...Ba3 14.Na3 Re8 15.bc6 bc6–/+ (15...fe6?! 16.cd7 Bd7 17.0-0-0=)) 14.Ke2 (better is 14.Kf1!? fe6 15.Be6 Rf7 A) < 16.Bg4 Ne5 (< 16...cb5 17.Be6 Bb6 18.Ke1+/–) 17.Bf3 Nf3 18.gf3 Rf3=; B) 16.Bf7 Kf7 17.h3+/–) 14...Re8–/+ (< 14...fe6 15.Be6 Rf7 16.h3+/– (< 16.Bg4 Ne5 17.Bc8 Rc8+=)) 15.h3 Ndf6 (better is 15...cb5!? 16.Bb5 Re6 (< 16...fe6 17.hg4 Bb6 18.Rd1+/–) 17.hg4 Bb6–/+) 16.hg4+= Ng4? (16...Be6 17.Be6 Re6 18.Kf2 Ne4 19.Kf3 Rae8 20.bc6 Rf6 21.Ke3 Nf2 22.Kd4 Nh1 23.cb7 Rb6–+) 17.Ng5+– Ne5 18.Bf7 (< 18.Nh7 Bg3 19.Bb3 a4+/–; 18.Rh7?! Nc4 19.Kf2 f6+=) 18...Nf7 19.Nf7 (19.Kf2 Ng5 20.Nd2 Ne4 21.Ne4 Re4 22.bc6 Rf4 23.Ke3 Rc4–/+) 19...Kf7 (19...Re4 20.Kf2 Rf4 21.Kg3 Rf7 22.bc6 bc6 23.Nd2+–) 20.Kf2 Re4 21.bc6 bc6 22.Nd2 (22...Ra4 23.Bc5+–) 1–0. Flattum,Odd – Larsson,PE, corr ICCF EU–H, 1965.

3.f4 g6 4.Bb2 Bg7 5.Nf3 0-0 6.c4 (6.e3 d5=) 6...d6 (6...a4 7.e3=) 7.e3= Bf5 =. algernon (2270) – ggreenhalf (2285), net–chess.com, 2002.

3.g3 d6 4.f4 e5 5.fe5 de5 6.Bg2 Bc5 7.Bb2 0-0 (7...e4 8.d4 Bb4 9.c3=+) 8.e3 (8.Be5 Nbd7 9.Nf3 Ne5 10.Ne5 Bd4–+) 8...c6 (8...e4 9.Nc3 Bg4 10.Nge2=+) 9.Nf3 (9.Be5!? cb5 10.Nc3=) 9...e4–/+ 10.Ng5 Re8 (10...Bg4 11.Qc1 cb5=) 11.0-0= Nbd7 12.Nc3 Ne5 (12...cb5!? 13.Nge4 b4 14.Nc5 Nc5+=) 13.Nce4 Ne4 14.Ne4 Bg4 15.Qe1 Bb4 16.a3 Bf8 17.bc6 bc6 18.Rf4 Bh5 (18...Nf3 19.Bf3 Bf3 20.Nf6 (20.Rf3?! Re4 21.d3 Re6+/–) 20...gf6 21.Rf3+–) 19.Rf5 Nc4 20.Bf6! (20.Rh5 Nb2 21.Ng5 h6 22.Bc6 hg5 23.Ba8 g6=) 20...gf6 (20...Qf6 21.Nf6) 21.Nf6 (21.Rh5 Ba3 22.Qe2 Bb2+–) 21...Kh8 22.Nh5 (better is 22.Ne8 Qe8 23.Rh5 Ba3 24.Bf1+–) 22...Na3 23.Ra3! (23...Ba3 24.Qa1 f6 25.Qa3 Qd2 26.Qc5+–; 23.Rf7 Nc2 24.Nf6 Qf6 25.Rf6 Ne1 26.Re1 Bb4+–) 1–0. Bernstein,Osip – Valvo,Michael J, USA, 1960.

3.a4 d6

4.Bb2 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.a4).

4.c4 b6 5.h3 (5.d4 e5=) 5...g6 (5...e5 6.d3=+) 6.Bb2 Bg7 7.e4 0-0 8.d3 c6 9.e5 (9.Qf3!?=) 9...de5 (9...Nfd7 10.Nf3–/+) 10.Be5 Nbd7 11.Nf3?? (better 11.Bc3–/+) 11...Ne5–+ 12.Ne5 cb5 (12...Qd4 13.Ng6 fg6 14.Ra2 cb5 15.ab5–+) 13.ab5? (better 13.Nc6 Qd6 14.ab5–+) 13...Nd7 (better 13...Qd4 14.Ng6 fg6–+) 14.Nc6=+ Qe8 15.Ra2 Nc5 (15...Nb8 16.Nb8 Rb8 17.Be2=+) 16.Re2 (16.d4 Ne6=) 16...e6 17.d4 Bb7 (better 17...Na6!?=) 18.dc5+– bc5 (18...Bc6 19.bc6 bc5 20.Rd2+–) 19.Qd6 (19.Ne5!? Qe7 20.Qd7+–) 19...Bc6+– 20.Qc6 Qc6 21.bc6 Rac8? (better 21...Rfc8!?+=) 22.Ra2+– Rc6 23.Ra5 Bd4 24.Bd3 Rb8 25.0-0 Rcb6 (25...Rd6 26.Rb5 Rbd8 27.Be2+–) 26.g4 (26.Rb5!? Rb5 27.cb5 e5+–) 26...Rb2 Black is in command 27.Na3 (27.Rb5 R8b5 28.cb5 Kg7+–) 27...R8b3 28.Be4 Rg3 29.Kh2 (better 29.Kh1 Bf2 30.Nc2=) 29...Rgb3? (29...Be5 30.Kh1 Rh3 31.Kg1=) 30.Nb5 (better 30.Kg2!?+–) 30...Bf2+– 31.Ra8 Kg7 32.Bg2 Bg3 33.Kh1 Rc2 34.Ra4 (34.Ra7!? Kh6 35.Rff7 Rc4 36.Nc7+– (36.Rh7?! Kg5 37.Ra1 Rb5=)) 34...Rbb2= 35.Ra7?? Attacks the backward pawn on f7 (better 35.Rg1=) 35...Rg2–+ Do you see the mate threat? 36.Rff7 Kh6 37.Rh7 Kg5 Threatening mate: Rh2 38.Ra1 (38.Rhf7 Be5 39.Ra3 Rgc2–+) 38...Rh2 39.Kg1 Be5 (39...Rbg2 40.Kf1 Bf2 41.h4 Kg4 42.Rf7 Rg1 43.Ke2 Bd4 44.Kd3 Rg3 45.Rf3 Rf3 46.Ke4 Re2) 40.Rd1 Rbg2 ½–½. hamiltonharris (1805) – echecfanatique (1725), ChessWorld.net, 2014.

4.e3 Nbd7 5.Bb2 Nb6 (5...e5 6.Nf3=) 6.c4 (6.Bf6 ef6 7.Nf3 d5=) 6...e5 7.Nf3 Bg4 8.Be2 g6 (8...e4 9.Bf6 Qf6 10.Nd4 Be2 11.Qe2=) 9.Qc2 Qe7 10.0-0 Bg7 11.d4 0-0? (better 11...e4 12.Ne1 Be2 13.Qe2 0-0=) 12.de5+– de5 13.Ne5 (better 13.Ba3!? Qe6 14.Bf8+–) 13...Be2+= 14.Qe2 Ne4 15.Nd3 Nf6? (better 15...Nc4 16.Bg7 Kg7+=) 16.Ba3+– Qd7 (16...Qe6 17.Bf8 Rf8 18.c5+–) 17.Bf8 Rf8 18.c5 Nbd5 19.Nd2?? (19.Ra3 Ne4+–) 19...c6?? (better 19...Nc3 20.Qf3 Qd3–/+) 20.Rad1?? (better 20.bc6 bc6 21.Ra3+–) 20...Nc3–+ 21.Qf3 Nd1 (21...Qd3 22.Nb3 Nd1 23.Qd1–+) 22.Rd1 (22.Ne5 Qd2 23.Rd1 Qc3–+) 22...Qd3 23.Nf1 Qc4 (better 23...Qe4!? 24.bc6 bc6–+) 24.bc6–/+ bc6 25.Qc6 Ne4 26.Ng3? (better 26.Rd4!? Bd4 27.Qe4–/+) 26...Nc5 27.h3 (27.Rd5 Rb8 28.h3 Bf8–+) 27...Qa4 28.Qc5 (28.Qf3–+) 28...Qd1 29.Kh2 Qd7 (better 29...Qe1!? 30.Qc2–+) 30.Qa5 Rc8 31.Ne4 Rf8 (31...Qe6 32.Ng5 Qe7 33.Qd5–+) 32.Nc5?? (32.Ng3 Rb8 33.Ne4–+) 32...Be5 (32...Qf5 33.f4–+) 33.g3 Qd6 (33...Qd5 34.Nb3 Qf3 35.Qe1–+) 34.Ne6 (34.Ne4 Qe7 35.Kg2–+) 34…Qe6 (34...Qe6 35.Qa4 Qd5–+) 0–1. RichardSommer (2030) – MAMAEB (2065), lichess.org, 2020.

4.h3 e5 5.c4 d5 6.cd5 Nd5 7.e4 Nb4 8.Nc3 (8.Nf3 Bd6=) 8...Be6 (8...Nd7 9.Nf3–/+) 9.Nf3=+ Bc5 10.Be2 0-0 11.d3 (11.0-0 Qf6=+) 11...f6 (11...Qd6 12.0-0=+) 12.g4 (12.Be3 Be3 13.fe3 Qd6=+) 12...Nd7 (12...Rf7–/+) 13.Be3 (13.0-0 Rc8–/+) 13...Qe7 (13...Be3!? 14.fe3 Nc5–+) 14.d4–/+ ed4 15.Bd4 (15.Nd4!? Rad8 16.0-0–/+) 15...Rad8–+ 16.Qb1 (16.Rc1!?–+) 16...Ne5 17.Be5 fe5 18.Nd1 Rf3! 19.Bf3 Qf7 20.Be2 Rd1! 21.Kd1 Bb3 22.Kc1 Bc2 23.Qb4 Bb4 (24.Kc2 Qf2–+) 0–1. Susanna – Pasqua,Dante, corr, 1962.

3.Bb2 e5

4.a4 e4 5.e3 d5 6.c4 Bd6 7.cd5= Nbd7 8.Ne2 0-0 9.Ng3 Nc5 10.Nc3 Bg4 11.Qc2 The pressure on e4 grows 11...Re8 12.Ba3 b6 (12...Qe7 13.Bc5 Bc5 14.Nge4 Ne4 15.Ne4+–) 13.Bc5+– Bc5 14.Nce4 Ne4 15.Ne4 Bf5 (15...Bb4 16.f3 Bf5 17.Bd3+–) 16.Bd3 Be4 17.Be4 White is in command 17...h6 (17...Qh4 18.Bf3+–) 18.0-0 Qh4 19.Bf3 Bd6 Threatening mate: Qxh2 20.g3 Qf6 21.Bg2 Re5 22.d4 Re7 23.Qc4 Rae8 24.e4 Bb4 25.f4 Qg6 (25...Re4 26.Be4 Re4 27.Rad1+– (27.Qc7 Qd4 28.Kh1 Re2 29.Qc8 Bf8–+)) 26.e5 Rd8 (26...Qf5 27.Qc6+–) 27.f5 Qg5 28.Rf4 (28.f6 gf6 29.Rf6 Bd2+–) 28...Kh7 (28...Bd2 29.f6 gf6 30.Rf6 Be3 31.Kh1+–) 29.Raf1 (29.f6 gf6 30.Rf6 Qe3 31.Kh1 Qc3+–) 29...f6 30.e6 (30.Qd3 Ree8+–) 30...Bd6 31.R4f3 Rf8 32.Qd3 Kh8 (32...Qh5 33.Re3+–) 33.Qe4 Ree8 (33...Qd2 34.Qe3 Qb4 35.Ra1+–) 34.Rc3 Qd2 35.Qe3 (better 35.Qd3!? Qd3 36.Rd3 Kg8+–) 35...Qa2 36.Rc6 Qa4 37.Qd3 Qb4?? (37...Re7 38.Rcc1 Qb4 39.Rb1+–) 38.Qc4 (better 38.Rb1 Qa4 39.Rcc1+–) 38...Qc4 39.Rc4 Ra8 (39...Re7 40.Kf2+–) 40.Ra1 Rfe8 41.Raa4 Re7 42.Kf2 Rd8 43.Ke3 h5 44.Ke4 Kh7 45.Bf3 Kh6 46.h4 (46.Be2 g5+–) 46...g6 (better 46...Bg3!? 47.Rc3 Bh4+=) 47.g4+– hg4 48.Bg4 Rg8 (48...gf5 49.Kf5 (49.Bf5?! Rg8+–) 49...Bg3 50.Bf3+– (50.Kf6 Bd6 51.Kf5 Rf8 52.Ke4 Rf4 53.Kd3 Rg4–+)) 49.Ra2 g5 50.h5 Rd8 51.Rac2 Ra8 52.Rc6 a4 53.Ra2 a3 54.Rc4 (54.Rc1 Ra5 55.Be2 Ra4+–) 54...Ra7 (54...Ra5 55.Rc3+=) 55.Kd3 (better 55.Rc1+–) 55...Ra5= 56.Kc3 (better 56.Rc6!?=) 56...Rb5–/+ 57.Rb4?? (57.Bd1–/+) 57...Ra5 (better 57...Rb4 58.Ra3 Rb1–+) 58.Rb3=+ Rd5 59.Kc4 Rd4?? (better 59...Ra5=+) 60.Kd4+– Be5 (60...Re8 61.Raa3 Bc5 62.Kd5 Rd8 63.Kc6+–) 61.Kd5 c6 (61...Bb2+–) 62.Kc6 Rc7 (62...Bd4+–) 63.Kd5 (better 63.Kb6 Rc1 64.Rba3 Bd4 65.Kb7+–) 63...Rc5 64.Ke4 Rc3 (64...Rc4 65.Ke3 Bd6+–) 65.Rc3 Bc3 (65...Kg7 66.Raa3 Kh7 67.Ra7 Bc7 68.Rcc7 Kh6 69.Rh7) 66.Ra3 (66.e7 Bd2 67.e8Q Kh7 68.h6 Bc3 69.Qd7 Kh6 70.Rh2) 66...Bb2 (66...Bb4 67.Ra7 b5+–) 67.Rb3 (67.e7 Ba3 68.e8Q Kg7 69.h6 Kh7 70.Qf7 Kh6 71.Qg6) 67...Bc3 (67...Bd4 68.e7 Bf2 69.e8Q Kh7 70.Qf7 Kh8 71.h6 b5 72.Qg7) 68.Rb6 (68.Rc3 Kg7 69.Rc8 b5 70.e7 b4 71.e8Q b3 72.Qg6) 68...Bd4 (68...Kg7 69.Rb7 Kg8 70.e7 Kf7 71.h6 Bb4 72.Bh5 Kg8 73.e8Q Bf8 74.h7 Kh8 75.Qf8) 69.Rb7 (69.Kd4 Kg7 70.Rb7 Kf8 71.e7 Ke8 72.h6 Kf7 73.Bh5 Kg8 74.e8Q) 69...Bc5+– 70.Rh7 (better 70.Rf7 Be7 71.Bf3+–) 70...Kh7 71.e7 (better 71.Kd5 Bb4 72.Kc6+–) 71...Kh6?? (better 71...Be7 72.Kf3 Bd6+=) 72.e8Q (72.e8Q Kh7 73.h6 Bf8 74.Qf7 Kh8 75.Qf8 Kh7 76.Qg7) 1–0. BeepBeepImAJeep (2700) – Sick_clown (2615), lichess.org, 2020.

4.Be5 Bc5 5.e3 0-0 6.Bb2 d5 7.a4 c6 8.Nf3 Re8 9.Be2 Bg4 10.0-0 Nbd7 11.d4 Bd6 12.Nbd2 Qc8 (12...cb5 13.ab5 Ne4 14.c4+–) 13.c4+– h6 (13...b6 14.Ba3 Ba3 15.Ra3+–) 14.Rc1 Qd8 15.h3 Bh5 16.Ne5 (better 16.c5!? Bc7 17.Bc3+–) 16...Be2+= 17.Qe2 Ne5 18.de5 Be5 19.Be5 Re5 20.Nf3 Re8 21.Rfd1 Rc8 22.Qe1 Qe7 (22...cb5 23.cb5 Qb6 24.Nd2+=) 23.Nd4 (better 23.cd5!? cd5 24.Qa5+–) 23...c5= 24.Nf3 dc4 25.Qa5 (25.Rc4 b6 26.Qe2=) 25...Ne4 (better 25...Ra8!? 26.Qb6 Ra4=+) 26.Rc4+= Nd6 (26...Qe6 27.Rdc1+=) 27.Rc2 c4 (27...Ne4!? 28.Qb6 Rcd8 29.Rd8 Rd8+–) 28.Qb4 Red8 29.Rcd2 (29.Nd2!? Qe5+–) 29...c3+– 30.Rc2 (worse 30.Rd6 Rd6 31.Nd4 Rd7–/+) 30...Qe4 31.Qe4 Ne4 32.Rdc1 (32.Nd4 f5+–) 32...Rc4 (32...Rd3 33.a5+–) 33.a5 (33.Nd4 Kh7+–) 33...Ra8 34.Nd4 (34.Ra1!?+–) 34...Ra5= 35.f3 Nd6 36.Rc3 Rc3 37.Rc3 Nb5 38.Rc8 Kh7 39.Nf5 Kg6 (39...g6 40.Nd4=) 40.Ne7 (40.e4!?+=) 40...Kf6= 41.Ng8 Kg6 42.Kh2 Kh7 43.Ne7 Ra1 44.Nd5 Nd6 45.e4?? (better 45.Rc7=) 45...Nc8–+ 46.Nf4 (46.Kg3 b5–+) 46...Ra2 (46...Ne7 47.Kg3–+) 47.Kg3 Nd6 48.Nh5 (48.h4 g5 49.hg5 hg5–+) 48...g6 (better 48...b5 49.e5 Nf5 50.Kf4 Rg2 51.Ke4–+) 49.Nf6 (49.Nf4 b5 50.Nd5 g5–+) 49...Kg7 50.Nd5 Ne4 (better 50...f5–+) 51.fe4 Rd2 52.Kf4 (52.Kf3 f5 53.Nf4 fe4 54.Ke4 b5–+) 52...Rd4 (52...Rg2 53.Kf3 Rd2 54.Kf4–+) 53.Ne3 (53.Ke5 Rd3 54.Nf4–+) 53...Rd1 (better 53...f5–+) 54.Nd5?? (54.Nd5 f5 55.Nc7–+; better 54.Nd1 Kf6 55.e5 Ke6 56.Nc3+–). BeepBeepImAJeep (2605) – lamorocha (2375), lichess.org, 2016.

4.Be5 Bc5 5.e3 0-0 6.Bb2 d5 7.Nf3 c6 8.a4 Re8 9.Be2 Bg4 10.0-0 Nbd7 11.d4 Bd6 12.Nbd2 Rc8 13.c4 Bb8 14.c5 Qe7 (14...Ne4!?+–) 15.b6 Nf8 16.h3 Bh5 17.Bc3 Bf3 (17...Ne4 18.Ne4 de4 19.Nd2 Be2 20.Qe2+–) 18.Nf3 (18.gf3?! Qe6 19.Kg2 Ng6+=) 18...Ng6 19.Ba5 (19.Bd3 Nf8+–) 19...Ne4 (19...Nf4 20.ef4 Qe2 21.Qe2 Re2 22.Rfe1+–) 20.Bd2 Ng5 (20...Kh8 21.a5+–) 21.a5 Nf3 22.Bf3 Nh4 23.a6 ba6 24.Ra6 Qg5 25.e4?? (25.Bg4!? f5 26.e4 Qe7 27.Bf5 Nf5 28.ef5 Qf6+–) 25...Qg6?? (better 25...Nf3 26.Qf3 Qd2=+) 26.e5 (better 26.ed5 Qd3 27.b7 Nf3 28.Qf3 Qa6 29.bc8R Rc8 30.d6+–) 26...f5? (better 26...Qd3 27.Ra4 Nf3 28.gf3 f6+–) 27.Bf4 h6 28.Bh5 (better 28.Bd2+–) 28...Qe6 (28...Qg2) 29.Be8+– Re8 30.Bg3 Ng6 31.f4 Ne7 32.Ra8 g5 (32...Ng6 33.Qh5+–) 33.Qa4 (33.Qh5!? Qf7 34.Qh6 gf4 35.Bf4 Qg6+–) 33...Kg7 34.Qa6 Ng6 (34...gf4 35.Bf4 Qg8 36.Qb7+–) 35.Qb7 Re7 (35...Qe7 36.Rb8 Rb8 37.Qb8+–) 36.Qb8 gf4 37.Bf4 (37.Bf4 Qf7 38.g4+–) 1–0. BeepBeepImAJeep (2615) – lamorocha (2350), lichess.org, 2016.

4.Be5 d6 5.Bb2 Be7 6.a4 (6.Nf3 Be6+–) 6...0-0+= 7.c4 (7.e3 Be6+=) 7...d5 8.cd5 Nd5 9.e3 Nb4 10.Ba3 Nd3? (better 10...Re8=) 11.Bd3+– Ba3? (11...Bf6 12.Nc3 Qd3 13.Bf8 Kf8+–) 12.Ra3 (12.Na3?! Qd3 13.Nf3 Bf5+–) 12...c6 13.Be2 (13.Qc2 h6+–) 13...cb5 (13...Qg5 14.Bf1+–) 14.ab5 Be6 (14...Qg5 15.Bf1+–) 15.Nc3 Nd7 16.Nf3 Nc5 (16...Nb6 17.Qa1+–) 17.0-0 Nd3 1–0. AleksandrNekhoroshik (1610) – yarbalash, lichess.org, 2020.

3.Bb2 e6

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

4.a3 Be7 5.e3 c6 6.c4 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c6 6.c4 Be7).

4.c4 c6 (--> 3.c4 c6 4.Bb2 e6).

4.e3 d5 5.Nf3 (--> 3.Nf3 e6 4.Bb2 d5 5.e3).

4.e3 d5 5.Nf3 c5 (no 6.bc6) (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 a5).

4.e3 d5 5.Nf3 Be7 6.c4 c6 7.a4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 c6 6.a4 0-0 7.c4 a5).

4.e3 Be7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 Be7 4.e3 a5).

4.Nf3 (--> 3.Nf3 e6 4.Bb2).

3.c4 a4

4.a3 e6 5.Nc3 d5 6.e3 b6 (6...e5 7.d4 ed4 8.ed4=) 7.Bb2 Nbd7 8.Na4 h6 (8...Bd6 9.cd5 ed5 10.Nf3+=) 9.Bd3 (9.Nf3 Bd6+/–) 9...Bd6+= 10.Nf3 0-0 (10...e5 11.cd5 e4 12.Be4 Ne4 13.Bg7–/+) 11.cd5+/– Nd5 12.Qb1?? (12.0-0 N5f6+/–) 12...N7f6?? (better is 12...Ra4 13.Bh7 Kh8–+) 13.e4 Nf4 14.0-0? Bc5?? 15.Nc5+– bc5 16.Bc4 Bb7 17.Nh4?? Ne4–+ 18.Nf3 Ra4?? 19.Ne5?? Nd2 20.Qd1 Qg5 21.Qg4 Nf1 22.Qg5 hg5 23.Bf1 f6 24.Nc4?? Bd5 25.Ne3 Kf7 26.g3 Nh5 27.Be2 g6 28.Rd1 Ng7 29.Ng4 Ke7–+ 30.Nf6? Rf6 31.Bf6 Kf6 32.Rd3 Bc4 33.Rf3 Ke7 34.Bd1 Bd5 35.Re3 Nf5?? 36.Ba4+= Ne3 37.fe3 Bc4 38.Kf2 g4 39.e4 Kf6 40.Ke3 g5 41.Bd1+/– Bb5 42.a4 Bc6 43.a5 c4 44.Kd4 Bb7? 45.Bg4 Ba6? 46.e5+– Ke7 47.Be2 c3 48.Bd1 Kd7 49.Ba4 Kc8 50.Kc3 Kb7 51.Bd7 c6 52.Kb4 Kc7 (53.Be6 Bd3+–; 52...Be2 53.Be6 g4 54.Bf5+–). rabelloenter (1960) – tomassic (1850), net–chess.com, 2006.

3.c4 g6

4.Bb2 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 g6 4.c4).

4.Nf3 b6 5.a4 (5.d4 Bb7=) 5...Bg7 6.Nc3 e6 (6...0-0 7.d4=) 7.Ra2 (7.d4 Bb7+=) 7...Bb7= 8.e3 c5 9.Be2 (9.d4 cd4 10.ed4 Qc7=) 9...d5 10.d4 cd4 11.ed4 dc4 12.Rc2 Bd5 (12...Nd5 13.Nd5 ed5 14.Ba3=) 13.Ba3 (13.0-0 0-0=) 13...Bf8 14.Bf8 Kf8 15.0-0 Nbd7 16.Qc1 (16.Nd2 Rc8=) 16...Kg7 17.Nd1 (17.Nd2 Rc8=+) 17...Rc8 (17...Qe7 18.Ne5=+) 18.Ne3= Qc7 19.Bc4 Bf3 20.gf3 (20.Be6 Qb7 21.Bd7 Rc2 (< 21...Nd7 22.gf3 Rhd8 23.Kg2+=) 22.Qc2 Qd7 (< 22...Nd7 23.gf3 Qf3 24.Qc7+=) 23.gf3 Qd4=+) 20...Qd6 21.Rd1 Qf4 22.Be2 Rc2–/+ 23.Qc2 Rd8 24.Ng2 Qb8 25.f4 Rc8 26.Qd3 Qd6 27.Bf3 Qb4 28.Bc6 Qa4 29.Ne3 Rd8 30.f3 Nc5–+ 31.Qc3 Qb3 32.Qb3 Nb3 33.d5 ed5 34.Nd5 a4 (35.Ne3 Rd1 36.Nd1 a3–+) 0–1. Kupec,Jan – Baerschneider,Alfred, corr 3GMM–09, 1996.

4.Nf3 Bg7 5.d4 =.

3.e3 a4

4.a3 e5 5.Bb2 Bd6 (5...d6 6.d4 e4 7.c4=) 6.Nf3 0-0 (6...e4!? 7.Nh4 0-0=) 7.Be5 Be5 8.Ne5 d5 9.Nf3 Bg4 10.Be2 c6 (10...Ra5 11.Nc3+=) 11.bc6 Nc6 12.Nc3 Ne4 13.0-0 Nc3 14.dc3 Qf6 (14...Ra5 15.Qd2+=) 15.c4 (15.Rb1 Qc3 16.Qd5 Qa3 17.Rb7 Qc3+=) 15...Bf3 (15...dc4 16.Qb1= (worse is 16.Bc4 Rfd8 17.Qe1 Bf3 18.gf3 Ne5–/+)) 16.Bf3+= (worse is 16.gf3 d4+=) 16...dc4 17.Bc6 Qc6 18.c3 (18.Qh5 Rad8=) 18...b5 (18...Rfd8 19.Qc2+=) 19.Qc2 Rad8 20.Rfd1 h6 21.h3 Qf6 22.Qb2 Rb8 23.Rd5 Qc6 24.Rad1+= Kh7 25.Qb4 f6 26.Rc5+/– Qe4 27.Rd4 Qc2 28.Rdd5 Rbd8 29.Rb5+/– Qc1 30.Kh2 Rd5 31.Rd5 Rc8 32.Ra5 Qf1 33.f3 Qf2? 34.e4 Qe3+/– 35.Ra4 Rd8 36.Qc4?? Qf4–+ 37.Kg1 Rd1 38.Kf2 Rd2 39.Kg1?? Qg3 40.Qf1+– Rd1?? 41.Qd1 Qf4 42.Rd4 Qb8 43.c4 Qb3 44.Qd3 Qb1 45.Kh2 Qd3+– 46.Rd3 f5 47.ef5 Kg8 48.c5 (48.c5 Kf8 49.c6 Kg8 50.c7 Kf7 51.c8Q g6 52.Qe6 Kg7 53.Rd7 Kf8 54.Qf7) 1–0. Fournier,Frederic (1845) – hectorbernal, Active, 2011.

4.Bb2 c6 5.Nf3 b6 (5...e6 6.Bd3=) 6.Be2 e6 7.0-0 Be7 8.c4 0-0 9.Nc3 (9.Bf6 Bf6 10.d4 Bb7+=) 9...a3= 10.Bc1 Bb4 (10...d5!?=) 11.Qb3+= c5 12.Nb1 Bb7 13.Na3 d5 14.Nc2 Ba5 15.a4 (15.d3 Qd6+=) 15...Nbd7 16.Bb2 Ne4 (16...dc4 17.Qc4 Ne4 18.Na3+=) 17.Rfd1 (17.d3 Ng5+=) 17...dc4 18.Bc4 Nd6 19.Be2 Bd5 20.Bc4?? (better 20.Qa3+=) 20...Bc4 21.Qc4 (21.Qa3 Be2 22.d4–+) 21…Nc4 (21...Nc4 22.Bc3 e5–+) 0–1. alddhsfd (1780) – SLRpolymath (1790), lichess.org, 2019.

3.e3 d6

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

4.Bb2 g6 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 g6).

4.c4 e5 5.Bb2 =.

4.c4 g6 5.Nc3 Bg7 6.Rb1 Bf5 7.d3 e5 8.e4 Be6 9.Nd5 Bd5 10.cd5+= Nbd7 11.Be3 0-0 12.g4 b6 13.g5 Nh5 14.Qg4 f5 15.ef5 Rf5 16.Ne2 Qe7 17.Ng3= Ng3 18.hg3 Nc5 19.Qh4+= Bh8 20.Kd2 Qg7 21.Be2 Re8 22.Qc4 e4 23.d4 Qe7? 24.dc5+– Rf2? 25.cd6 cd6 26.Rbc1 Bg7 27.Kd1 Rg2 28.Bg4 Qe5 29.Be6 (29...Re6 30.de6 Rg3 31.e7 d5 32.Qc8 Kf7 33.Qd7 Qe7 34.Qd5 Kf8 35.Rc8 Qe8 36.Qd6 Kf7 37.Qf4 Ke7 38.Qe4 Kd7 39.Qe8 Kd6 40.Rd8 Kc7 41.Qd7#) 1–0. Andersson,Lars H – Molinsky,Herbet, corr SSKK 1–462, 1994.

4.d4 Bf5 =.

3.e3 e5

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

4.Bb2 e4 5.Bf6 Qf6 6.Nc3 =.

4.Bc4 d5 5.Be2 Bd6 6.Bb2 Nbd7 7.Nf3 a4 8.a3 e4 9.Nd4 Ne5 10.f4 ef3 11.Nf3 Nfg4 12.Nc3 Nf3 13.Bf3 Qh4 14.g3 Bg3 15.Kf1 Nh2 16.Ke2 Bg4 17.Rh2 Qh2 White resigned 0–1. kaalmakreel (2185) – pgcbies, ChessWorld.net, 2017.

3.a4 d5

4.Bb2 d4 5.Nf3+= c6 (5...c5 6.e3 de3 7.fe3+=) 6.Nd4 (6.Bd4 Bg4+–) 6...cb5 (6...e5 7.Nb3 Bd6 8.Nc3+=) 7.ab5 (7.Nb5 Nc6+–) 7...Bd7 (7...e5 8.Nb3 Bd6 9.d4+=) 8.e3 (8.f4 e6+–) 8...b6 (8...e5 9.Nb3 Bd6 10.Na3+–) 9.Qf3 Ra7 10.c4 (10.Ra4 Rc7 11.Nc3 e5+–) 10...e5 11.Nc6 (11.Nf5 g6 12.Nh4 Bd6+=) 11...Qc7 1–0. GuestVGMK – GuestGYPJ, freechess.org, 2017.

4.e3 e5 5.Nf3 Bd6 6.d3 0-0 7.Be2 Nbd7 (7...e4 8.Nfd2–/+) 8.0-0=+ Re8 9.g3 (9.Bb2 Nb6=+) 9...e4 10.Ne1 Nc5 (10...Nb6 11.Bb2–/+) 11.d4 Ne6 12.c4 c5 13.Ng2? (13.bc6 bc6 14.c5 Bc7=+) 13...b6 (better is 13...cd4!? 14.cd5 Nd5–+) 14.Nc3 dc4 15.d5 Nc7 16.Bc4 Bg4 17.Qb3 Qd7 18.Re1 g5 19.Bf1 Qf5 20.Bb2 Bf3 21.Rec1 Rad8 22.Rc2 Be5 23.Rd2 Rd6 24.Re1 Ng4 25.Ne4? Be4–+ 26.f4 Bb2 27.Qb2 Rd5 28.Bc4 Rd2 29.Qd2 Nd5 30.h3 Ngf6 31.g4 Qg6 32.Bd5 Nd5 33.Qf2 h6 34.f5 Qf6 35.Kh2 Qe5 (36.Kg1 Nc3–+) 0–1. Norbeck,Ivar – Davidson,Lennart, corr SSKK 2–05, 1988.

4.Nf3 e6 =+.

4.h3 e5 5.Nf3 Nbd7 6.e3 +=.

4.Bb2 Nbd7

5.e3 e5 6.c4 dc4 7.Bc4 Nb6 8.Be2 Qe7 (8...Bd6 9.d3=+) 9.Nf3= Be6 (9...e4!? 10.Nd4 Nfd5=) 10.Ne5 0-0-0 (10...Bd5 11.0-0+–) 11.Nf3 Ne4 (11...Nfd5 12.0-0+–) 12.0-0 Bc4 (12...Qb4!? 13.Bd4 Bc5+–) 13.Bc4 (13.d3 Nc5 14.Nd4 Bd5+–) 13...Nc4 14.Bd4 Ng5 15.Ng5 Qg5 16.Qc2 Nd6 (16...Ne5 17.f4 Qg6 18.Qg6 Ng6 19.f5+–) 17.Rc1 (17.Qc3 Nf5 18.Be5 Bd6 19.Bd6 Rd6+–) 17...Rd7 (17...Ne8 18.Na3+–) 18.Nc3 (better 18.Qc3!? Kd8 19.Qa5 Qh5+–) 18...Kb8 (18...Nf5 19.Ne2+–) 19.Ne4 (19.Ne2 Ne8+–) 19...Ne4 20.Qe4 Qg6?? (better 20...Bd6+–) 21.Qe8 (21.Qe8 Rd8 22.Qd8) 1–0. RichardSommer (2125) – Ahmad_halabi (1965), lichess.org, 2020.

5.e3 e5 6.c4 Bd6 7.cd5 Nd5 8.Nf3 (8.Nc3 N5f6=+) 8...0-0 9.Nc3 N5f6 (9...Nc3 10.Bc3 e4 11.Nd4=+) 10.Be2 Nc5 (10...e4 11.Nd4=+) 11.d4 Ncd7 12.de5 Ne5 13.0-0 Qe7 (13...Be6 14.Ne5 Be5 15.Qc2=) 14.h3 (14.Nd5 Nd5 15.Qd5 c6=) 14...Bf5 (14...Nf3 15.Bf3 Qe5 16.Re1=+) 15.Nd5= White gets in control 15...Nd5 16.Qd5 Nf3 (16...c6!? 17.Qb3 Be6=) 17.Bf3+= Bg6 (better 17...Bc8!?+=) 18.Qb7+– Qg5 (18...Rad8 19.Rfc1+–) 19.Qd5 Qd5 20.Bd5 Rad8 21.Bc6 Bb4 22.Ba3 (22.Be5 Bd6 23.Bc3 Bb4+–) 22...Bc2 (22...Rd2 23.Bb4 ab4 24.e4+–) 23.Rfc1 (better 23.Bb4 ab4 24.Ra2+–) 23...Bb3? (better 23...Rd2+–) 24.Bb4 ab4 25.Rcb1 (25.a5 Be6+–) 25...Bc2 (25...Bd5 26.Bd5 Rd5 27.Rb4+–) 26.Rb4 Ra8 (26...f5 27.a5 Be4 28.Be4 fe4 29.Re4+–) 27.Rd4 (27.Ba8!? Ra8 28.Rc1 Bf5+–) 27...Rab8 (27...Ra5+–) 28.Rd7 (28.a5!? h6+–) 28...Rfc8 29.a5 h5 (29...Bf5 30.Rd4+–) 30.a6 g6 (30...Bf5 31.a7 Bd7 32.Bd7+– (32.ab8B?! Bc6 33.bc6 Rb8+–)) 31.a7 Ra8 (31...Kg7 32.Rc7! Rd8 33.ab8R Rb8 34.Ra8+–) 32.Ba8 Ra8 33.Rc7 Be4 34.b6 Kg7 35.b7 (35.Ra4 Bd5 36.e4 Be4 37.Re4 g5+–) 35...Bb7 36.Rb7 Rd8 37.Rb8 (37.Rb8 f5 38.a8Q Kh6 39.Rd8 Kg5 40.f4 Kh4 41.Qa5 g5 42.Qe1) 1–0. RichardSommer (2150) – Paulcarrero (2155), lichess.org, 2020.

5.e3 e5 6.Nf3 Bd6 7.Be2 h5 (7...c5 8.0-0=+) 8.0-0= e4 9.Nd4 Bh2! 10.Kh2 Decoy to h2 10...Ng4! 11.Bg4 (11.Kh3 Nde5 12.Nf5 Bf5 13.g3 Ne3 14.Kh2 N5g4 15.Kg1 Nd1 16.Bd1–+) 11...hg4 Discovered attack. 12.Kg1 (12.Kg3 Qh4 13.Kf4 Qh6 14.Kg3 Qh2 15.Kg4 Qh4 16.Kf5 g6) 12...Qh4 13.f3 (13.f4 g3 14.Qh5 Rh5 15.Nc3 Qh2) 13…g3 (13...g3 14.fe4 Qh2) 0–1. Markzela (1685) – rezanoruzi33 (2230), lichess.org, 2020.

5.g3 c6 (5...e5 6.Bg2=+) 6.Bg2 e5 7.d3 (7.Nf3 Bd6=+) 7...Bd6 (7...cb5 8.Nf3–/+) 8.c4=+ cb5 9.cb5 d4 (9...Bb4 10.Nd2=+) 10.Nf3 Rb8 (10...Bb4 11.Nbd2=) 11.Nbd2 0-0 12.0-0 Nb6 13.Ba3 (better 13.e3 de3 14.fe3=) 13...Bb4 (better 13...Bg4=+) 14.Bb4+– ab4 15.Qb3 (15.Ne5!? Nfd5 16.Re1+–) 15...Re8 16.Qb4 Nbd5 (16...Nfd5 17.Qb3 Nc3 18.Rfe1+=) 17.Qb3 (17.Qb2 Nc3+=) 17...b6 (17...Nc3!? 18.Rfe1 Be6+=) 18.Nc4+– Nc3 (18...Qc7 19.e3 Bg4 20.Rfc1+–) 19.Nfe5 (better 19.Nce5 Ne2 20.Kh1+–) 19...Be6? (19...Ne2 20.Kh1 Bb7 21.Nc6 Bc6 22.bc6+–) 20.Qc2?? (better 20.Nc6 Ne2 21.Kh1+–) 20...Rc8?? (better 20...Bc4 21.Nc6 Re2+=) 21.Nc6+– Rc6 22.Bc6 (22.bc6?! Bc4 23.dc4 Ne2 24.Kh1 d3+–) 22...Re7 (22...Bd7 23.Bf3 Bg4 24.Bg4 Ng4+–) 23.Ne5 (better 23.e3+–) 23...Bh3+– 24.Rfe1 (better 24.f4 Bf1 25.Rf1+–) 24...Re5= 25.e3 Rc5 26.ed4 Qd4 27.Qd2 h5 (27...Bd7 28.Bd7 Qd7 29.Qe3=) 28.Rac1 (28.Qe3!? Qb4 29.Qe7=) 28...h4 29.Qe3?? (29.Ra1=+) 29...Qg4 (better 29...Qe3 30.fe3 Ne2 31.Kf2 Nc1–+ (31...Rc1?! 32.Ke2 Rc2 33.Kf3–+)) 30.d4?? (better 30.Ra1 Qb4 31.d4=) 30...Ne2!–+ 31.Qe2 (31.Re2 Rc1 Combination; 31.Qe2 Rc1 Decoy) 31...Qe2 (better 31...Rc1!? 32.Qe3 Re1 33.Qe1 Qd4 34.Bg2 Bg2 35.Kg2 Qa4 36.Qf1–+) 32.Rcd1?? (32.dc5 Qd2 33.Rcd1 Qb2 34.Rd8 Kh7=) 32...Qg4?? (better 32...Qb2 33.dc5 Ng4–+) 33.dc5+= bc5 34.b6 Qc8 35.Bb5?? (better 35.Rd6 Kh7 36.a5=) 35...Qb7–+ 36.a5 (36.Bf1 Bf1 37.Kf1 Qb6 38.Rc1–+) 36…Qg2 0–1. JUANKARODA (1820) – chakaraka (1730), lichess.org, 2020.

4.Bb2 Bf5

5.e3 e6 6.Nf3 Bd6 7.Be2 h6 8.0-0 Nbd7 9.c4 0-0 10.Nc3 dc4 11.Bc4 c5 12.bc6 bc6 13.Nd4 Ne5 14.Be2 Bh7 15.d3 Rb8 16.Ba3 Ba3 17.Ra3 c5 18.Nb3 Nd3 19.Na5 Qa5 Theme: Deflection from d3 20.Bd3 Bd3 21.Qd3 Rb2 22.Ne4 Ne4 23.Qe4 Rc8 24.Qc4 Rb4 25.Qc2 c4 26.g3 Ra8 The pressure on the isolated pawn grows 27.Rd1 g6 (27...Ra4?? 28.Ra4 Qa4 29.Rd8 Rd8 30.Qa4+–) 28.Rd7? (better 28.Rda1!?=+) 28...Ra4–+ 29.Ra4 Qa4 30.Qa4 Ra4 31.Kg2 g5 32.Rc7 Kg7 33.Kf3 h5 34.h3 Kg6 35.Rc6 Rb4 36.Ke4 c3 37.Kd3 (better 37.Ke5!?–/+) 37...Rb2–+ 38.Rc3 (38.f4 Rg2–+) 38...Rf2 39.Rc2 (39.g4 h4–+) 39...Rc2 40.Kc2 h4 41.gh4 gh4 42.Kd3 Kf5 (42...Kf5 43.Kd4 f6–+) 0–1. onur604 (2320) – mastermind100 (2340), lichess.org, 2020.

5.Nf3 Nbd7 6.e3 e6 7.Be2 Bd6 8.d3 (8.Nh4 Bg6=) 8...0-0 (8...e5 9.0-0=) 9.Nh4= Re8 10.Nf5 ef5 11.0-0 f4 12.Nd2 (12.ef4!? Bf4 13.Re1=) 12...fe3–/+ 13.fe3 Re3 14.Bf3 Ne5 (14...c5 15.bc6 Qb6 16.Kh1 Qb2 17.cd7–/+) 15.Bd4 (15.Be2 c5 16.Bc1 d4=+) 15...Nf3 16.Nf3 Re8 17.Qd2 Ng4 (17...c5 18.bc6 bc6 19.Qg5–/+) 18.h3 Ne5 19.Qc3 (19.Be5 Be5 (worse 19...Re5 20.Ne5 Be5 21.d4+–) 20.Ne5 Re5–/+) 19...Nf3–/+ 20.Rf3 Qg5 21.Raf1 Re2 22.g4 Bb4 (22...Qh6 23.Qb3 Qd2 24.R1f2 Re1 25.Kg2=+) 23.Qa1?? (23.Qc7 Re7 24.Qb6 Rae8+=) 23...Bd2 (better 23...Qd2 24.Bf2 Rf8–+ (worse 24...Qc2 25.Rc1 Qb3 26.Rc7–/+)) 24.Rf7= Be3 (24...Re7!? 25.Re7 Qe7=) 25.Kh1+= (25.Kh1 Bd4 26.Qd4 Rc2 27.R7f5+=) 1–0. GuestQKPQ – GuestFWFH, freechess.org, 2017.

3.a4 e5=+

4.Bb2 d6 (--> 1.b4 e5 2.Bb2 d6 3.b5 Nf6 4.a4 a5).

4.Bb2 Qe7 5.Nf3 d6 6.g3 Nbd7 7.Bg2 g6 8.0-0 Bg7 9.e3 0-0 10.d3 Re8 11.Nfd2 d5 12.Nc3 c6 13.Ba3 Qe6 14.Bh3?? (better is 14.Rb1=) 14...Qh3–+ 15.bc6 bc6 16.Nf3 (16.e4 d4 17.Ne2 Ng4–+) 16...h6 (16...e4 17.Ng5 Qf5 18.de4 Qg5 19.f4–+) 17.Bd6 (17.e4–+) 17...e4 18.de4 de4 19.Nd4 (19.Ra3–+) 19...Ng4 20.Qg4 Qg4 21.Rab1 Ne5 22.f4 (22.Be5 Be5 23.Nd1 c5–+) 22...Nf3 23.Nf3 ef3 24.Nd1 Ba6 25.Rf2 Be2 26.Nc3 Red8 27.Ne2 fe2 28.Re1 Rd6 29.Ree2 Rad8 30.h3 Rd1 31.Kg2 Qf5 32.g4 Qe4 33.Kg3 g5 34.f5 Be5 (34...Be5 35.Rf4 Rg1 36.Kf2 Qg2; 34...Rg1 35.Rg2 Be5 36.Kf2 Qg2) 0–1. wk1234 – przbik, playok.com, 2012.

4.c4 d5 5.cd5 Bf5 6.d3 Bg4 (6...Bb4!? 7.Bd2 Qd5 (worse 7...Nd5 8.e4+–) 8.Bb4 ab4=+) 7.f3= Bc5? (better 7...Bb4 8.Bd2 Bh5+=) 8.fg4+– Ng4 9.h3?? (better 9.Nh3 Qd5 10.Nc3+–) 9...Bb4–+ 10.Nd2 (10.Qd2 Qh4 11.Kd1 Nf2 12.Kc2 Bd2 13.Nf3–+) 10...Qh4 11.g3 Qg3 0–1. alessandrocarvalhaes (1835) – lichess AI level 5, lichess.org, 2020.

4.e4 Ne4 5.Qe2 d5 6.f3 Nf6 7.Qe5 –/+.

4.Nf3 d6 (4...e4 5.Nd4=+) 5.e3= Be7 6.Bc4 0-0 7.0-0 Nbd7 (7...Bg4 8.Be2=) 8.d3 (8.Nc3 Nb6 9.Be2 Re8=) 8...Nb6 (8...d5 9.Ba2=+) 9.Bb3= c6 10.c4 d5 (10...Bg4 11.h3 Bh5 12.Nbd2=) 11.Bd2 (better 11.Ne5 Bd6 12.f4+=) 11...e4=+ 12.de4 de4 13.Nd4 cb5 (13...c5 14.Ne2=+) 14.cb5= Bg4 15.Qe1 Nfd5 (15...Nbd7!?=) 16.Ba5+= Bf6? (better 16...Bc5+=) 17.Bd5+– Qd5 (17...Ra5 18.Qa5 Nd5+–) 18.Bb6 Qg5 (18...Qh5 19.a5 Bf3 20.Bc7 (worse 20.gf3 ef3 21.Nf3 Qg4 22.Kh1 Qf3 23.Kg1 Ba1–/+) 20...Bd4 21.ed4+–) 19.Kh1 (19.Bc7 Rfc8 20.Bg3 Rd8+–) 19...Be5 20.f3 Qh5 (20...ef3 21.gf3 Qh6 22.f4+–) 21.f4 Bf6 22.Nd2 (22.Nc3!? Rfe8+–) 22...Bh4 23.g3 Be7 (23...Bf6+–) 24.Ne4 (24.Qb1 f5+–) 24...Bh3? (24...Qd5 25.Qb1 f5 26.Qa2 Qa2 27.Ra2 fe4 28.a5+–) 25.Rf2 (better 25.Nd2 Bf1 26.Qf1+–) 25...Rac8?? (better 25...Qd5+–) 26.Rc1 (better 26.f5 Rfe8 27.a5 Qh6+–) 26...Ba3?? (better 26...Qd5+–) 27.Rc8+– Rc8 28.Rc2 (better 28.Nc2 Qd5 29.Na3 Qe4 30.Kg1 Qa4 31.Qa1+–) 28...Rc2–+ 29.Ng5 Bg4 (better 29...Rc1 30.Qc1 Bc1–+) 30.Qb1 (30.Nc2 Bf8 31.Qd2+–) 30…Qh2 0–1. Dino_Jarach (1735) – T_BELLO96 (1775), lichess.org, 2019.

4.Ba3 Ba3

5.Ra3 d5 6.d4 Nbd7 7.Rg3 Qe7 8.c3 (8.de5!? Ne5 9.Nf3–+) 8...0-0–+ 9.Nd2 Re8 10.e4? (better 10.Qb3–+) 10...ed4 11.Qb3 (11.cd4 Qb4 12.Bd3 Ne4 13.Be4–+) 11...Nc5 12.Qc2 Nfe4 13.Ne4 Bf5 14.Qe2 (14.Be2 Ne4 15.Rf3–+) 14...Ne4 15.Rf3 Qa3 16.Re3 de3 17.Qe3 (17.Qc2 ef2 18.Ke2 Nc3 19.Kf3 Nd1 20.Qc3 Qc3 21.Kf4 Qd4 22.Kf5 Re5) 17…Qa1 (17...Qa1 18.Ke2 Nc3 19.Kf3 Re3 20.Ke3 Re8 21.Kf4 Qa4 22.Bc4 Qc4 23.Kf5 Qe4 24.Kg5 Re5) 0–1. rhometal – pcmvr, net–chess.com, 2019.

5.Ra3 d5 6.Nf3 e4 7.Nd4 0-0–/+.

5.Ra3 d5 6.g3 e4 7.Bg2 Nbd7 8.f3 (8.Nh3 0-0–/+) 8...Ne5 9.fe4 de4 10.Nh3 Bh3 (10...Nc4 11.Rb3 Qe7 12.0-0–/+) 11.Bh3 Qd6 12.0-0 h5 13.d4 Nc4 14.Rb3 h4 15.g4 Nd5 Black plans e3 16.Qc1 (16.Nd2 Nce3 17.Qc1 Qb6–+) 16...e3 17.Rf3 (17.Bg2 h3 18.Bd5 Qd5–+) 17...0-0 18.Qd1 (18.Bg2 Rfe8 19.Rf5 Nf4–+) 18...Nf4 19.Qf1 g5 20.c3 Rfe8 21.Rf4? (21.Bg2 Rab8 22.Kh1–+) 21...Qf4 (21...gf4?! 22.Bg2 Rab8 23.h3–+) 22.Qf4 (22.Qe1 Re6 23.Na3 Nd2–+) 22...gf4 23.Bg2 (23.Na3 Nd2 24.Rb2 f3 25.ef3 Nf3 26.Kg2 e2 27.Re2 Re2 28.Kf3 Ra2–+) 23...Nd2 24.Rb2 (24.Bb7 Nb3 25.Ba8 Ra8–+) 24...f3! 25.Nd2 (25.ef3 e2 Passed pawn; 25.Bf3 Nf3 Double attack) 25...ed2 (25...fg2?! 26.Nf3 h3 27.Ng5–/+) 26.Rd2 fe2 (26...fe2 27.Re2 Re2–+) 0–1. mpenga – pcmvr, net–chess.com, 2019.

4.Bb2 Bc5

5.e3 d6 6.Nf3 0-0 7.Be2 Nbd7 8.0-0 Re8 9.Ne1 Nd5 10.Bf3 N5b6 11.Nd3 e4–/+ 12.Nc5 Nc5 13.Be2 Nba4 14.c4?? Nb2–+ 15.Qc2 Nbd3 16.Bd3 ed3 17.Qd1 Qh4 18.Qf3 Bg4 19.Qg3 Qg3 20.fg3 Be6 21.Nc3 Bc4 22.Rf4 d5 23.Re1 Nb3 24.Rd1 a4 (25.Na2 Bb5–+) 0–1. Hasler,Ueli – Valverde,Mario (1995), CiF, 2006.

5.e3= Qe7 6.Nf3 d6 7.Be2 Bg4 8.h3 Bh5 9.Nh4 (9.0-0 Nbd7=) 9...Bg6 (9...Be2!? 10.Qe2 0-0=) 10.Ng6+= hg6 11.d4 ed4 (11...Bb6 12.Nd2+=) 12.ed4+/– Bb6 13.0-0 Nbd7 14.Bf3 0-0-0 15.Re1 Qf8 16.Na3 (16.Nd2 Re8+/–) 16...d5 (16...Rh4 17.Qd3+/–) 17.c4 Qb4 (17...Ne4 18.cd5 Nd6 19.Qd2+/–) 18.Qc2 dc4? (better is 18...Rde8 19.Re8 Re8+–) 19.Nc4 Rhe8 (19...Rde8 20.Red1 Qf8 21.Ba3+– (21.Nb6?! Nb6 22.Ba3 Qg8+–)) 20.Rec1 Qe7 21.Ba3 (21.Nb6?! Nb6 22.Ba3 Qd7+–) 21...Qe6 22.d5! Nd5 (22...Qd5 Deflection from b6 23.Nb6 Eliminates the defender b6) 23.Bd5 (23.Bd5 Qf6 24.Nd6 Kb8 25.Nb7+–) 1–0. Friberg,E – Broberger,H, Uppsala, 1985.

4.Bb2 e4

5.e3 d5 6.c4 Bg4 7.Be2 (7.Qc2 c6=+) 7...Be2 8.Qe2 Nbd7 9.f3 (9.Nh3=+) 9...ef3 (better 9...Nc5 10.Ra3 dc4 11.Qc4 Nd3 12.Rd3 Qd3 13.Qd3 ed3 14.Bf6 gf6–/+) 10.Nf3= Nc5 11.0-0 dc4 12.Qc4 Qd3 13.Qd3 Nd3 14.Bf6 gf6 15.Nc3 Bb4 16.Nd5 Be7?? (better 16...0-0-0 17.Nb4 ab4+–) 17.Nc7+– Kd7 18.Na8 Ra8 19.Nd4 Bc5 (19...Rg8 20.Rf5 Rg5 21.Raf1+–) 20.Rf6 b6 (20...Bd4 21.ed4 Rf8 22.Raf1+–) 21.Rf7 Kd6 22.Nc6 Re8 (22...Rh8 23.Raf1+–) 23.Raf1 (23.Rh7 Re4+–) 23...Kd5 (23...h5 24.Rh7+–) 24.Rh7 Kc4 Black gets the initiative 25.Rh4 (better 25.Rd7!? Re6+–) 25...Kb3 26.Rf6 (26.Rf7 Kc2 27.Kf1 Kd2+–) 26...Kc2 27.Rf7 (better 27.Kf1!? Kd2 28.e4 Nb2+–) 27...Kd2 28.Rd7 (28.Nd4 Re3 29.Nb3 Kc2 30.Nc5 Nc5 31.Rc4 Kb2+–) 28...Ke3?? (better 28...Re3 29.Rd3 Rd3 30.Kf1 Ra3+–) 29.Rh3 (better 29.h3+–) 29...Ke2 (better 29...Kd2 30.Re3 Re3 31.Rd3 Kd3 32.Kf1–+) 30.Kh1?? (better 30.Rd4 Rf8 31.Rf3 Rf3 32.gf3 Kf3 33.h4 Bd4 34.Nd4 Kg4 35.Nb3=) 30...Nf2–+ 31.Kg1 Nh3 32.Kh1 Nf2 33.Kg1 Nd3 (better 33...Ne4 34.Nd4 Kd3–+) 34.Kh1 Kd2 (34...Nb2!? 35.h4–+) 35.g3 Re1 (35...Kc3 36.h4–+) 36.Kg2 Re2 37.Kh3 (37.Kf3 Re3 38.Kg2 Kc3–+) 37...Kc3 38.Nd8 (38.g4 Re3 39.Kh4 Nf2–+) 38...Nb4 (38...Rd2!? 39.Kh4 Rh2 40.Kg5–+) 39.Nf7 (39.Nb7 Bg1–+) 39...Re6 (39...Kb3 40.g4–+) 40.Ng5 (40.Nd8 Rh6 41.Kg2 Kb3–+) 40...Rg6 (40...Re8 41.Kg4–+) 41.Ne4 Kb3 42.Nc5 (42.Rc7 Bd4 (worse 42...Ka4 43.Nc5 bc5 44.Rc5–+) 43.Rd7 Nc2–+ (43...Ka4?! 44.Rd4 Kb5 45.Kg2=+)) 42...bc5 43.Rc7 Rg5 (better 43...c4 44.Rc5 c3–+ (worse 44...Ka4 45.Rc4 Kb5 46.Rc3–+)) 44.b6 Na6?? (44...Rg8 45.g4 c4 46.b7–+) 45.Rc6?? (45.Ra7 Ka4 46.Ra6=) 45...Ka4 (45...Rg7!? 46.b7 Nb8 47.Rc5 Ka4 48.g4–+) 46.b7–/+ Nb8 (better 46...Rg7!? 47.Ra6 Rb7–/+) 47.Rc8=+ Na6 (better 47...Rg7 48.Rb8 Kb3=+) 48.b8Q (48.Rc6 Rg7 49.Ra6 Rb7 50.Rc6–/+) 48...Nb8–+ 49.Rb8 (49.Kh4 Rg6 50.Rb8 Rh6 51.Kg5 Rh2–+) 49…Rh5 (49...Rh5 50.Kg4 Rh2–+) 0–1. RichardSommer (2060) – TESTAbcdfegh12345678 (2145), lichess.org, 2020.

5.e3 d5 6.d3 Be7 7.g3 (7.de4 Ne4 8.Bg7 Rg8=) 7...0-0 (7...Bb4 8.Nd2=+) 8.Bg2=+ ed3 9.cd3 Bb4 (9...Bf5 10.Nf3=+) 10.Nd2 (10.Nc3!? d4 11.ed4 Re8 12.Nge2=) 10...Bf5–/+ 11.Bf1 (11.Bf6 Qf6 (11...gf6?! 12.d4=) 12.d4 Nd7–/+) 11...c5 (11...Nbd7 12.Ngf3 Re8–/+) 12.Qf3? (better 12.Ngf3!?–/+) 12...Be4!–+ 13.Bf6 (13.de4 Bd2 Double attack (13...Bd2 Decoy)) 13...Bf3 (13...gf6 14.de4 Bd2 15.Ke2+–) 14.Bd8 Bh1 15.Ke2?? (better 15.Bc7–+) 15...Rd8 16.Ngf3 1–0. bolu – sasikumar, net–chess.com, 2019.

5.e3 d5 6.Ne2 Bd6 7.Nd4 0-0 8.Be2 c5 9.Nb3 Be6 10.0-0 Nbd7 11.f4 ef3 12.Bf3 Ne5 13.d4 Neg4–+ 14.g3? Ne3 15.Qe2 Nf1 16.dc5 Ng3! 17.hg3 Bg3 18.Qg2 Ne4! 19.Be4 Qh4 (20.Na5 Ra5–+ (20...Qe4?! 21.Qg3 d4 22.Nb7=; 20...de4 21.Ra3 Bh2 22.Qh2 Qe1 23.Kg2 Qb1 24.Qe5 Qc2 25.Kg3–/+)) 0–1. playwaycool – Crapov, ChessWorld.net, 2006.

5.e3 d5 6.Ne2 Be7 7.Nd4= 0-0 8.Be2 c5 9.bc6 bc6 10.0-0 c5 11.Nb5 Nc6 12.c4 d4 13.ed4 Nd4=+ 14.N1c3 Bb7 15.Rb1 Rb8 16.Re1 h6 17.Bf1 Qd7 18.Qc1 Nb3 19.Qc2= Nd2 20.Rbd1 Rbd8 21.Bc1 e3 22.fe3 Be4 23.Qa2 Qg4 24.Rd2 Rb8 25.Rf2 Rfd8 26.Be2 Qe6 27.Ref1 Bg6 28.Qb3 Qe5 29.Bb2 Bd6 30.g3 Qg5 31.Kh1 Be5 32.Bf3 Qe3 33.Qa3 Bd4 34.Nd5 Nd5 35.Nd4 cd4 36.cd5 Qe5?? 37.Qc5 Rb4? 38.Qa5 Rdb8 39.Re2 Qg5 40.Re8 Re8 41.Qb4 d3 42.Re1 Re1 43.Qe1 Qd8 44.a5 f6 45.a6 Bf7 46.Qe3 Qb8 (46...Bd5 47.Qd3 Bf3 48.Qf3+–) 1–0. NN – SuperConstellation4, 1988.

5.Bf6 Qf6 6.Nc3 +=.

5.h3 d5 6.e3 Nbd7 7.Ne2 Bd6 8.Ng3 (8.Nbc3 0-0–/+) 8...0-0–/+ 9.Be2 g6 10.0-0 h5 11.d3 (11.Re1 Nc5–/+) 11...h4 12.Nh1 Re8 (12...Qe7 13.Nd2–/+) 13.Nd2 Nb6 14.de4 Ne4 15.Nf3 (15.Ne4 Re4 (15...de4?! 16.Qd4 f6 17.Qf6 Qf6 18.Bf6=) 16.Bd4 Qg5=+) 15...Be7 (15...Bc5 16.Nd2–+) 16.Nh2 (better 16.Ne5!?–/+) 16...Bf6–+ 17.Bd4 Nc3 18.Qd3?? (18.Bc3 Bc3 19.Ra3–+) 18...Bd4 19.Nf3 (19.Ra3 Bf5 20.Qd2 Ne2 21.Qe2 Re4–+) 19...Bf5 20.Qd2 Ne2 21.Qe2 Ba1 22.Ra1 Qf6 23.Re1 (23.c3 Qc3 24.Qd1 Qb4–+) 23...Na4 24.Nd4 (24.c4 Nb6 25.c5 Nc4–+) 24...Nc3 25.Qf3 (25.Qd2 Ne4 26.Qe2 a4–+) 25...a4 26.Nf5 (26.Ra1 Nb5! 27.Rd1 Nd4 28.ed4 a3–+) 26...gf5 27.Kh2 a3 28.Qf4 a2 29.Ra1 Ne2 (29...Ne2 30.Qd4 Nd4–+) 0–1. bolu – pcmvr, net–chess.com, 2019.

3.a4 e6

4.Ba3 Ba3 5.Ra3 b6 6.Nc3 =+.

4.Ba3 d6 5.c4 (5.Nc3 d5=) 5...Be7 6.Nc3 0-0 7.e3 c6 (7...Re8 8.d4=+) 8.Bd3 (8.Nf3 e5=) 8...Re8 9.Qc2 d5 10.Nf3 (10.Be7 Re7 11.Rc1 dc4 12.Bc4 e5=) 10...Ba3 11.Ra3 e5 12.Bf5 (12.cd5 cd5 13.Be2 d4=+) 12...d4 (12...e4 13.Bc8 Qc8–+ (13...ef3?! 14.Bb7 Ra7 15.bc6 fg2 16.Rg1=)) 13.Bc8 Qc8 14.Ne4 (better is 14.Nd1=+) 14...Nbd7?? (better is 14...Ne4 15.Qe4 cb5 16.Ne5 A) 16...bc4?! 17.Qd5=+ (17.Qd4? Qf5 18.Nf7 Kf7 19.Qc4 Kf8–/+); B) 16...Qc5 17.Qb7 Ra7 (17...Qe5 18.Qa8 bc4 19.0-0+/–) 18.Qb5 Qe5–/+) 15.Nd6+/– Qc7 16.Ne8 Re8 17.0-0 Qd6 18.Qb2 (18.Rfa1 c5+/–) 18...d3 19.Qc3 e4 20.Nh4 (20.bc6 bc6 21.Nd4 Qc5+/–) 20...Ne5 (20...Qc5 21.f4+=) 21.f4 Nc4= 22.Rb3 Qd5 23.bc6 bc6 24.Rb7 c5 25.Rb5 Nd7 26.g4 g6 27.Ng2 Ndb6= 28.f5 g5 29.Qf6 Qd8 30.Qh6 f6 31.Rfb1 Nd2 32.Rb6+= Nb1 33.Rb7 Re7 34.Rb1 Rg7 35.Kf2? d2 36.Rd1–/+ c4 37.Ne1 Rf7 38.Nc2 Qd3 39.Nd4 c3 40.Qh3 Rd7 41.Ne6?? c2 (42.Qf1 Qf1 43.Rf1 d1Q 44.Rd1 cd1Q 45.Nd4 Rb7 46.Kg2 Rb2 47.Kh3 Qf1 48.Kg3 Qg2) 0–1. Roczniak,Jan – Skowron,R, Radom Poland, 1983.

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

4.Bb2 Bd6 5.e3 0-0 6.c4 c6 7.Nf3 cb5 (7...Bb4 8.Nc3=) 8.ab5 b6 9.Be2 Bb7 10.0-0 Bc5 11.Nd4 (11.d4 Bb4+=) 11...d5= 12.Bf3 Qc8 (12...e5 13.Nf5 e4 14.Be2=) 13.cd5 Bd5 14.Bd5 (14.Nc3 Bf3 15.Qf3 Nbd7+–) 14...Nd5 15.Qf3 Nd7 (15...Qd7!?=) 16.Nc6+= N7f6 (16...Nb8 17.Qg3 f6 18.d4 Nc6 19.dc5+=) 17.Rc1 Re8 (17...Qd7 18.e4 Nb4 19.Bf6 gf6 20.Qf6 Nc6 21.bc6+–) 18.d4 Ne4?? (better 18...Bf8+–) 19.Qe4+– Qd7 (19...Bd6+–) 20.dc5 Nf6 (20...bc5 21.Rc5 Nf4 22.Qf3+–) 21.Bf6 gf6 22.Nd4 (22.Qd4 Qc7+–) 22...e5 (22...bc5 23.Qg4 Kh8 24.Rc5+–) 23.Qf5 (23.c6 Qd8 24.Nf5 Kh8+–) 23...Qe7 (23...Red8 24.c6 Qc8 25.c7+–) 24.Nc6 Qe6 (24...Qb7 25.Ra4 e4 26.Nd2+–) 25.Qe6 Re6 (25...fe6 26.cb6 Rab8 27.Nb8 Rb8 28.Ra5 Rb6 29.Rc8 Kg7 30.Ra7 Kh6 31.Rcc7+–) 26.cb6 a4 27.b7 Rf8 28.b8Q Kg7 29.Qf8! Kf8 30.Ra4 f5 31.b6 Kg7 32.b7 Rg6 33.b8Q f4 34.Qe5 Kh6 35.Qf4 Kg7 36.Ne7 (36.Qe5 f6 37.Qe7 Kh6 38.Rh4 Kg5 39.Rc5 Kh4 40.Qh7 Rh6 41.Qe4) 36...Rf6 (36...Rg2 37.Kg2 h6 38.Nf5 Kh7 39.Qh6 Kg8 40.Rc8) 37.Nf5 (37.Qg5 Kf8 38.Ra8 Ke7 39.Qe5 Re6 40.Rc7) 37...Kg6 (37...Rf5 38.Qg3 Kf8 39.Ra7 Rc5 40.Rc5 h6 41.Rc8) 38.Qg4 1–0. RichardSommer (1955) – Fooldan (2085), lichess.org, 2020.

4.c4 Be7 5.Bb2 0-0 6.Qb3 c6 (6...d6 7.d4=+) 7.d4 cb5 8.cb5 b6 9.e3 Bb7 10.f3 Bd5 (10...Re8 11.Nc3=+) 11.Bc4 (11.Qd3 Bb4 12.Nd2 Qe7=) 11...Bb7 (11...Bc4 12.Qc4 Bb4 13.Bc3=+) 12.Ne2 Nd5 13.0-0 Bd6 (13...Nb4 14.Ba3=) 14.e4+= Nb4 15.e5 Be7 16.Nbc3 Bg5 (16...d5 17.ed6 Qd6 18.Rac1=) 17.Nd1 (17.d5 Qc7 18.f4 Qc5 19.Kh1 ed5 20.Nd5 Bd5 21.Bd5 Qd5 22.Qd5 Nd5 23.fg5 Ra7+–) 17...Bh4 18.d5 (better 18.Ba3!?+=) 18...ed5=+ 19.Bd3 Nd3 20.Qd3 d6 21.g3 (21.ed6!? Bf6 22.Bf6 Qf6 23.Ne3=) 21...Be7–/+ 22.Nf4 de5 23.Be5 Bf6 (23...Nd7 24.Bd4–/+) 24.Qd4 (better 24.Bf6 Qf6 25.Ne3=) 24...Be5 25.Qe5 d4 (25...Nd7 26.Qf5–/+) 26.Re1 d3 (26...Bf3 27.Ra3 Bb7 28.Nh5=+) 27.Ra3 Bf3?? (better 27...Nd7 28.Qc3 Bf3 29.Qd3 Bb7–/+) 28.Rd3+– Nd7 29.Qe7?? (better 29.Qf5 Ra7 30.Rf3+–) 29...Qe7=+ 30.Re7 Bg4?? (30...Bd1 31.Rd1 Nc5 32.Nd5 Na4 33.Rd7–/+) 31.h3 (better 31.Ne3 Nf6 32.h3+–) 31...Bf5 (better 31...Bd1 32.Rd1 Nc5–/+) 32.Rd5 (32.Rd5 Rfe8 33.Rdd7 Bd7 34.Rd7+–) 1–0. afsharian – Robchas, lichess.org, 2018.

4.e3 b6 5.Nf3 Bb7 6.c4 Be7 7.Be2 0-0 8.0-0 c6 9.Nc3 cb5 10.ab5 d5 11.Bb2 dc4 12.Bc4 Nbd7 13.d4 Qc7 14.Be2 Rac8 15.Rc1 Qb8 16.Na4 Qa8 17.Ne5 Rc1 18.Bc1 Rc8 19.Bf3 Ne5 20.Bb7 Qb7 21.de5 Nd5 22.Bb2 Bb4 23.Qd4 h6 24.h3 Bc5 25.Nc5 Rc5 26.e4 Nb4 27.Qd8 Kh7 28.Ba3 Qe4 29.Bb4 ab4 30.Qb6 Qe5 31.f4 Qd5 32.f5 ef5 33.Qa5 Rb5 34.Qc7 b3 35.Qc1 b2 36.Qb1 Qd4 37.Kh1 g6 38.Rd1 Qc3 39.Rf1 Qc1 40.Rc1 bc1Q 41.Qc1 Re5 42.Qc4 Re1 43.Kh2 Re4 44.Qf7 Kh8 45.Qg6 Rf4 1–0. Adamkosh (1940) – detreville (1780), lichess.org, 2020.

4.e3 d5 5.Nf3 Bd6 6.Bb2 0-0 7.Be2 Nbd7 8.0-0 c6 9.c4 Nb6 10.cd5 cb5 (10...ed5 11.Qc2=) 11.de6+= ba4 12.ef7 Rf7 13.Bd4 Nfd5 14.Bb6 (14.Nc3 a3+=) 14...Qb6 (14...Nb6!? 15.Nc3 Bd7=) 15.Qa4 Bd7 16.Qd4 (better is 16.Qc4!? Be6 17.Ng5+/–) 16...Qd4= 17.Nd4 Be5 18.Bc4 Bd4 19.ed4 Be6 20.Nc3 Rd7 21.Rfe1 Bf7 22.Re5 Nc3 23.Bf7 Kf7 24.dc3 b5? (better is 24...Rc8!? 25.Re3 b5+=) 25.Rb5+– a4 26.Rb4 Rda7 27.Kf1 a3 28.Ke2 a2 29.Kd3 Ra3 30.Rb2 Kf6 31.f3 g5 32.g4 Kg6 33.Rc2 h5 34.h3 h4 35.Kc4 Kf6 36.Kb4 Ke6+/– 37.Re2 Kd5 38.Re5 Kd6 39.Rg5 R8a4= 40.Kb5 Ra5 41.Kb4 R5a4 42.Kb5 Ra7 43.Rg6 Kd5= 44.c4 Kd4 45.Rd6 Kc3 46.Rdd1 R3a5 47.Kb6?? Kc4 48.f4?? R5a6 0–1. Hal1958 – Tiit145, playchess.de, 2005.

4.Nf3 Bb4 =.

3.a4 g6

4.Bb2= d5 5.e3 (5.Nf3 Bg7 6.e3 0-0 7.Be2=) 5...Bg7 6.Nf3 0-0 7.Be2 =.

4.c4 c5 5.Nf3 (5.bc6 dc6 6.Nf3 Bg7 7.d4=; 5.e3 Bg7 6.d4 d6 7.Nf3=; 5.Bb2 Bg7 6.e4 0-0 7.e5=; 5.d4 cd4 6.Nf3 Bg7 7.Nd4=) 5...Bg7 6.e3 0-0 7.d4 =.

4.c4 d5 5.cd5 Bg7 6.Bb2 Qd5 7.Nc3 =.

4.c4 d6 5.Nc3 (5.d4 Bg7 6.Nf3 0-0 7.e3=) 5...Bg7 6.Nf3 Ne4 7.Bb2 =.

4.c4 e5 5.Bb2 (5.d4 ed4 6.Qd4 d6 7.Nf3+=; 5.Nf3 e4 6.Nd4 c5 7.Nc2+=; 5.d3 Bb4 6.Bd2 d5 7.cd5=) 5...d6 6.d4 Bg7 7.de5 =.

4.d4 A) 4...Bg7 5.Nd2 (5.Nf3 d5 6.e3 Bg4 7.h3=; 5.Bf4 d5 6.e3 Nh5 7.Bg5=; 5.e3 d5 6.Nf3 0-0 7.Be2=; 5.c4 0-0 6.Nc3 e5 7.de5=) 5...d5 6.Ngf3 0-0 7.c4=; B) 4...d5 5.Nf3 (5.e3 Bg7 6.Be2 Ne4 7.Nf3=; 5.Bf4 Bg7 6.e3 0-0 7.Be2=; 5.Nd2 Bg7 6.Ngf3 0-0 7.e3=; 5.c4 dc4 6.e3 Be6 7.Nd2=) 5...Bg7 6.e3 Bg4 7.Be2=.

4.e3 d5 5.Nf3 (5.d4 Bg7 6.Nf3 0-0 7.Be2=; 5.Be2 Bg7 6.Bb2 0-0 7.Nf3=) 5...Bg7 6.Bb2 0-0 7.Be2 =.

4.e3 d6 5.Nf3 (5.Be2 Bg7 6.Nf3 c5 7.0-0=; 5.d4 Bg7 6.Nf3 0-0 7.Bd3=; 5.Bb2 Bg7 6.Nf3 0-0 7.Be2=) 5...Bg7 6.d4 Bf5 7.Bd3 =.

4.e3 e5 5.Bb2 d6 6.Nf3 Bg7 7.Be2 =.

4.Nf3 d5 5.Bb2 (5.e3 Bg7 6.d4 Bg4 7.h3=) 5...Bg7 6.e3 0-0 7.Be2 =.

4.Nf3 d6 5.Bb2 (5.d4 Bg7 6.e3 0-0 7.Be2=; 5.e3 e5 6.Be2 Bg7 7.0-0=) 5...Bg7 6.e3 e5 7.Be2 =.

4.Bb2 Bg7

5.Nc3 0-0 6.Nf3 =.

5.Nc3 e5 6.Nf3 d6 7.e4 c5 (7...c5 8.Bc4 Nbd7+=; 7...0-0 8.Bc4=). Guenschmann – Mothes, corr SOK–89–32, 1989.

5.c4 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.b5 Bg7 4.a4 0-0 5.c4 a5).

5.c4 b6 6.Qc2 0-0 7.d3 (7.e4 d6=) 7...Bb7 (7...c6 8.e4=) 8.f3 Re8 9.e4 e5 10.Ne2 d6 11.Nd2 Nbd7 12.Nb3 Qe7 13.Nc3 c5 14.bc6 Bc6 15.Nb5 Rec8 16.Be2 Bh6 17.Bc1 (17.d4!?=) 17...Bc1=+ 18.Rc1 Nh5 (18...Bb5 19.ab5 d5–/+) 19.Nd2 (better 19.g3!?=+) 19...Bb5 20.ab5 Nf4 (better 20...Qh4 21.Kd1 Ng3–+) 21.0-0?? (better 21.g3 Ne6 22.Qd1=+) 21...Ne2–+ 22.Kh1 Nc1 23.Rc1 Nc5 24.Nb3 (24.Rf1 Qh4–+) 24...Nb3 (24...Qg5 25.Rd1–+) 25.Qb3 Qg5 26.Ra1 Qd2 27.Rd1 (27.h3 a4 28.Qb1 f5–+) 27...Qb4 (27...a4 28.Qb1 (28.Rd2?? ab3 29.h3 Ra2–+) 28...Qc3 29.Qa1–+) 28.Qb4 ab4 29.Rb1 (29.Kg1 Ra2 30.h4 Rca8–+) 29...Ra4 (29...Ra3 30.h3–+) 30.Kg1 (30.h3 Rca8 31.Kh2 f5–+) 30...Rca8 31.g4 (31.Kf2 Ra1 32.Rb4 R8a2 33.Kg3–+) 31...Ra1 32.Ra1 Ra1 (32...Ra1 33.Kf2 b3 34.f4 b2 35.Kf3 b1Q 36.Ke3 Qg1 37.Kd2 Qc1 38.Ke2 Ra2 39.Kf3 Qf4) 0–1. lindsey000 – coral9br, gameknot.com, 2017.

5.c4 Nh5 6.Nc3 0-0 7.e3 e6 (7...c5 8.Be2+=) 8.Be2 Nf6 9.Nf3 Ne4 10.Qc2 Nc3 11.Bc3 (11.dc3?! b6=) 11...d5 (11...d6 12.Bg7 Kg7 13.0-0+=) 12.cd5 (12.Bg7 Kg7 13.0-0 c6+–) 12...ed5 13.Nd4 (13.Bg7 Kg7 14.Rc1 c6+–) 13...c5 (13...Re8!?+=) 14.bc6+– Nc6 15.Nc6 bc6 16.Bg7 Kg7 17.Qc6 Be6 18.Qc3 (18.0-0 Rc8 19.Qb5 Rb8+–) 18...Kg8 (18...d4 19.Qd4 Qd4 20.ed4+=) 19.0-0 Qg5 20.Bf3 (20.Qd4 Rfc8+–) 20...h5 (20...Rfc8 21.Qa3+–) 21.Rab1 h4 (21...Rfc8 22.Qd3+–) 22.Rb5+– Rad8 (22...h3 23.g3+–) 23.Ra5 Bh3 (23...h3 24.g3+–) 24.Kh1 Bg4 25.Bg4 Qg4 26.h3 Qe4 Black prepares the advance d4 27.Rc5 (27.d3 d4 28.Qc4 Qe6 29.ed4 Qc4 30.dc4 Rd4+–) 27...d4 (27...Qa4 28.Qf6+–) 28.Qc2 Qe6 29.Qc4 (29.Rc1 Rfe8+–) 29...Qe4 (29...de3 30.de3 Qf6 31.Rc6+–) 30.a5 (30.a5 Qe7 31.Rc7+–) 1–0. RichardSommer (2205) – Kms69 (2205), lichess.org, 2020.

5.e3 0-0 6.c4 c6 7.Nf3 cb5 8.ab5 b6 9.Be2 Bb7 10.0-0 d6 11.h3 Nbd7 12.Nc3 Rc8 13.Nd4 Ne5 (better 13...e5 14.Nc6 Bc6 15.bc6 Rc6=) 14.f4 (better 14.d3!?+=) 14...Nc4–/+ 15.Bc4 Rc4 16.Qb3 (16.d3 Rc7–/+) 16...Rc5 (16...Rb4 17.Qa3–/+) 17.Ba3 (17.f5 Qa8 18.Rf2 Qe8–/+) 17...Rc7 18.Rac1 (18.Bb2 Qa8 19.Rf2 Nd7–/+) 18...Qa8–+ 19.Rf2 Rfc8 20.Qb1 (20.Qd1 h6–+) 20...Ne4 21.Re2 (21.Ne4 Be4 22.d3 Rc1 23.Bc1 Bd3 24.Qd3 Rc1 25.Kh2 Qd5–+) 21...Nc3 (21...Nd2 22.Rd2 Rc3 23.Rc3 Rc3 24.Bb2 Re3 25.Qc1–+) 22.dc3 Rc3 23.Rc3 Rc3 24.Bb2 Re3?? (better 24...Be4 25.Qd1 Rc5–+) 25.Re3+– Bd4 (better 25...e5 26.fe5 de5+–) 26.Bd4 Bg2 27.Qc2 (27.Re7?! Bh3 28.Qa2 Qf8+–) 27...Bh3 (27...e5 28.fe5 de5 29.Be5 Bh3 30.Rh3 Qd8+–) 28.Rh3 Qe4 (28...e5 29.Qc6 Qd8 30.Bb6 Qf6 31.fe5 Qe5 32.Qa8 Kg7 33.Qa5 h5+–) 29.Qc8 1–0. RichardSommer (2135) – Zukertort72 (2145), lichess.org, 2020.

5.e3 0-0 6.c4 d5 7.Nf3 dc4 8.Bc4 Nbd7 9.0-0 Nb6 10.Be2 Bg4 11.Nc3 e5 (11...Re8 12.d4+=) 12.h3 (better 12.Ne5!? Be2 13.Qe2+–) 12...Bf3= 13.Bf3 Re8? (better 13...Nc4!? 14.Bc1 e4=) 14.Bb7+– Rb8 15.Bc6 Nc4 (better 15...Re6+–) 16.Qb3?? (16.Be8 Ne8 17.Bc1 Qd3+–) 16...Nb2? (better 16...Nd2!? 17.Qc2 Nf1 18.Be8 Qe8 19.Rf1 c6+=) 17.Qb2 (17.Be8!? Ne8 18.Qb2 Qd3+–) 17...Rf8 (17...Re6 18.Qc2+–) 18.Rad1 Nh5 (18...Qd3 19.Qa3+–) 19.Qc2 (19.Nd5 Qd6+–) 19...Qh4 20.Ne2 (20.Nd5 Rfd8+–) 20...Kh8 (20...Rfd8 21.f4+–) 21.Bf3 (21.d4 ed4 22.Nd4 Rbd8+–) 21...f5 (21...Nf6 22.d3+–) 22.Bh5 (22.d4 Rf7+–) 22...gh5 (22...Qh5 23.Rfe1 Rbc8+–) 23.Ng3 f4 24.ef4 (24.Nf5!? Qg5 25.e4 Rg8+–) 24...ef4 25.Ne4 (better 25.Nf5 Qg5 26.Ng7+–) 25...f3+= 26.g3?? (better 26.Rfe1 Bd4 27.Qd3+=) 26…Qh3 (26...Qh3 27.Qc7 Qg2) 0–1. RichardSommer (2150) – hasancil (2145), lichess.org, 2020.

5.e3 0-0 6.d4 c6 (6...d5 7.Nf3=) 7.Nd2 (7.Nf3 d5=) 7...d6 (7...d5 8.Ngf3=) 8.Ngf3 Nbd7 (8...d5 9.Bd3=) 9.c4 (9.Bd3 Nd5+=) 9...Re8 10.Be2 e5 11.de5 (11.0-0 e4 12.Ng5 Bh6=) 11...de5 (11...Ne5 12.0-0=) 12.0-0 (12.e4 Nc5 13.Qc2 Nh5=) 12...Qe7 (12...e4 13.Nd4=) 13.Qc2 Nc5 (13...e4 14.Nd4 c5=) 14.Rad1 (14.Be5 Bf5 15.Qb2 Bd3+=) 14...Nfd7 (14...Bf5 15.Qc1 e4=+) 15.Nb3 (15.e4 Nb6 16.Ra1 cb5 17.ab5 f5=) 15...Nb3 (15...Na4 16.bc6 bc6 17.Ba1–/+) 16.Qb3=+ Nc5 (16...Qb4 17.Qa2 e4 18.Ba3 Qa4 19.Rd6 cb5 20.Bd1 Qc4 21.Bb3 ef3 22.Bc4 bc4 23.Qc4 fg2 24.Kg2–/+) 17.Qc2 (17.Qa3 Bf5=) 17...h6 (better 17...Bf5!? 18.Qc1 Na4–/+) 18.Ba3 (18.Nd2 cb5 19.cb5 Be6=) 18...Bf8 (18...Bf5 19.Qd2=) 19.Nd2+= Qe6 (19...Qh4 20.Bc5 Bc5 21.Nf3=) 20.Bc5 Bc5 21.Ne4 Be7 (21...Qe7 22.Nc5 Qc5 23.Rd2+=) 22.c5+– Rd8 (22...Kg7 23.Rd2+–) 23.Bc4 (23.Rd8 Bd8 24.Nd6 cb5 25.Bb5 Qf6+–) 23...Qf5 24.Bd3 (24.Rd8 Bd8 25.f4 Be6+–) 24...Be6? (better 24...cb5!? 25.Bb5 Be6=) 25.Nd6+– Qg5 (25...Qf6 26.Nb7 Rd7 27.bc6+–) 26.Nb7+– Rdc8 (26...Rdb8 27.f4 ef4 28.ef4+–) 27.Be4 (27.f4 ef4 28.ef4 Qh5+–) 27...Rab8? (better 27...cb5!? 28.ab5 a4+–) 28.Bc6 Rc6 (28...Bg4 29.Rb1+–) 29.bc6 Rc8 (29...Bg4 30.f3 Qe3 31.Qf2 Qf2 32.Kf2+–) 30.Na5 (30.Qe4 Rc7+–) 30...Bd8 (30...Bg4 31.f3 Qe3 32.Qf2+–) 31.f4 (31.Nb7 Bf6+–) 31...ef4 32.ef4 Qf5 (32...Qh5 33.Nb7 Be7+–) 33.Nc4 (better 33.Qf5 Bf5 34.Nb7+–) 33...Qc2–+ 34.Ne5 Qc5 35.Kh1 Qf8 (35...Bc7 36.Rc1 Qb4 37.a5–+) 36.f5 (36.Rd4 Qa3–+) 36...Bf5 37.Nd7 (37.h3–+) 37...Bf6 38.Nf6?? (better 38.Nf8 Kf8 39.Rc1=+) 38...Kg7 39.Ne4 (39.Nh5 Kh8 40.Ng3 Be6–+) 39...Qe7 (better 39...Be4 40.Rfe1 Qb4 41.Re2–+) 40.Rf5 (40.Nd6 Rc6 41.Nf5 gf5–+) 40...gf5 (worse 40...Qe4 41.Rff1 Rc6 42.Ra1–+) 41.Ng3 (41.Nd6 Rd8 42.Nf5 Kf8 43.Rg1–+) 41...Qe1 (better 41...Qa3–+) 42.Re1+– f4 (42...Rc6 43.Nf5 Kh7+–) 43.Rf1 (better 43.Nf5 Kh7 44.Rc1+–) 43...fg3 44.Rf2?? (better 44.Rc1 Kf6 45.a5+– (45.hg3?! Ke5+–)) 44...Rc6 (44...gf2 45.h4 f1Q 46.Kh2 Rc6 47.h5 Rc2 48.Kg3 Rg2 49.Kh4 Qh1) 45.Rf1 (45.hg3 Rc1 46.Kh2 Ra1+–) 45...Kg8 (45...Ra6 46.Rf4+=) 46.h3 (better 46.a5+=) 46...Rc1?? (46...Rc5 47.Ra1 Ra5 48.Kg1=) 47.Kg1 (better 47.Rc1 Kh7 48.a5+–) 47...Rf1?? (better 47...Rc5=) 48.Kf1+– 1–0. TwelveTeen (2685) – Pizza_in_winter (2655), lichess.org, 2018.

5.e3 0-0 6.Nf3 d5 7.Be2 =.

5.e4 d6 6.c4 0-0 7.f3 c6 8.d4 Nbd7 9.d5 cd5 10.cd5 Ne8 11.Bg7 Ng7 12.Ne2 f5 13.Qd4 Qb6 14.Qb6 Nb6 15.Nd4 Bd7 16.Bd3 Rac8 17.Kd2 fe4 18.Be4 Rc4 19.Nb3 Ra4 20.Ra4 Na4 21.Na5 Bb5 22.Nb7 Rb8 23.Na5 Nc5 24.Nc3 Bd7 25.Rb1 Rb1 26.Nb1 Ne8 27.Nc3 Nf6 28.Bc2 Na6 29.Nc6 Kf8 30.Nd8 Nc7 31.Bb3 Ke8 32.Nc6 (better is 32.Nb7!?=) 32...Ncd5!–/+ 33.Nd5 (33.Bd5 Nd5 Combination; 33.Nd5 Bc6 Remove defender) 33...Bc6 34.Nf6 ef6 35.Ke3 Ke7 36.g3 f5 37.f4 Kf6 38.Kd4 Ke7 39.Bd1 (39.Ke3 h6 40.h4–/+) 39...h6–/+ 40.h4 Kf6 41.Be2 g5 42.hg5 hg5 43.Bd1 gf4 44.gf4 Be4 45.Bb3 Kg6 46.Bd5 Bc2 47.Bc6 Kf6 ½–½. minas_morgul (1685) – heffalump (1655), gameknot.com, 2009.

5.Nf3 d5 6.Nc3 (6.e3 0-0=) 6...c6 (6...0-0 7.e3=) 7.bc6 (7.e3 0-0=) 7...bc6 (7...Nc6 8.e3=) 8.e3 Ba6 (8...Nbd7 9.Rb1=) 9.Ba6 (9.d3 Nbd7=) 9...Na6 10.0-0 (10.Rb1 Rb8=) 10...Nb4 (10...Rb8 11.Rb1=) 11.Ba3 (11.Rb1 0-0=) 11...0-0 12.Ng5 (12.d4 Qc7=) 12...Ne4 (12...h6 13.Nf3 Rb8+=) 13.Nce4 (13.Nge4 de4 14.Bb2 Qd7+=) 13...Ba1 (13...de4?! 14.c3 Qd5 15.Qg4+=) 14.Qg4? (better is 14.Qa1!? de4 15.Qe5+=) 14...de4 (14...Nc2 15.Qh4 h5 16.Ng3–/+) 15.Qh4 (15.Bb4 ab4 16.Qh4 h5 17.Ra1 Qd2 18.Ne4 Qc2 19.Qe7 b3 (19...Ra4?! 20.Nf6 Kg7 21.Nh5 gh5 22.Qg5 Qg6 23.Qg6 fg6 24.Ra4–+) 20.Nf6 Kh8 21.Nh5 gh5 22.Qe5 Kg8–+) 15...h5 16.Ra1? (16.Bb4 ab4 17.Ra1 e5–+) 16...e5 (better is 16...Nc2 17.Rc1 Na3 18.Ne4 Rb8–+) 17.Bb2 (17.Rc1 Rb8–/+) 17...Nc2 (17...Re8 18.g4 Qf6–/+ (18...Qd2 19.gh5 Ra7 20.Ne4 Qc2 21.hg6 fg6 22.Nf6 Kf7 23.Ne8+/–; 18...Nc2 19.gh5 Qf6 20.Rc1–/+)) 18.Rc1 (better is 18.Qe4!? Na1 19.Qe5–+) 18...Nb4–+ (18...Qd2 19.Ne4 Qb4 20.Be5+/–) 19.Qg3? (19.Rf1 Re8–+) 19...Nd3 20.Ba1 Nc1 21.Qe5 f6 22.Qe6 (22.Qe4 Ra7 23.Qg6 Rg7 24.Qg7 Kg7 25.Ne6 Kf7 26.Nd8 Rd8 27.Bc3 Ne2 28.Kf1 Nc3 29.dc3–+) 22...Kh8 (better is 22...Kg7 23.h3 Ne2 24.Kh2 Kh6 25.Ne4 Qb8 26.Ng3 h4–+) 23.Nf7+– Rf7 24.Qf7 Ne2 25.Kf1 (better is 25.Kh1 Rb8 26.Bf6 Qf6 27.Qf6 Kh7 28.h4+–) 25...Nc3= 26.Bc3 Qd3 27.Ke1 Qb1 28.Ke2 Qd3 29.Ke1 Qb1 30.Ke2 Qd3 31.Ke1 Qb1 32.Ke2 Qd3 ½–½. Nautiluschess – singingknight, ICS blitz, 2001.

5.g4 h6 6.Nf3 +=.

5.Nf3 0-0

6.c4 d6 7.Nc3 b6 (7...Nbd7 8.d4=) 8.g3= Bb7 9.Bg2 e5 10.e4 (better is 10.0-0!?=) 10...Ne4–/+ 11.d3 Nc3 12.Bc3 Nd7 13.0-0 e4 14.Nd4 Nc5 15.de4 Be4 16.Re1 Bg2 17.Kg2 Qd7 18.Qf3 Rae8 19.Nc6 Bc3 20.Qc3 f5 21.f3 Qg7 22.Qd2 Kh8 23.Re8 Re8 24.Re1 Re1 25.Qe1 h6 (worse is 25...Na4 26.Qe8 Qg8 27.Qe7+=) 26.Qe8 Kh7 27.Nd8 h5 (27...Qb2 28.Kh3 Qe5 (28...Na4?! 29.Ne6 Qf6 30.Qd7 Kg8 31.Qc8 Kf7 32.Nc7=) 29.Qf7 Qg7–/+) 28.Ne6+= Ne6 29.Qe6 Qe5 30.Qf7 Qg7 31.Qg7 (better is 31.Qe6!?=) 31...Kg7–/+ 32.Kf2 Kf6 33.Ke3 g5 34.Kd4 Ke6 35.h3 Ke7 36.Kd5 Kd7 37.g4 fg4 38.fg4 h4 39.Kd4?? (better is 39.Ke4 c6 40.bc6 Kc6 41.Kd4=) 39...Ke8?? (39...c6 40.bc6 Kc6–/+) 40.Kd5 ½–½. Zampier,Alexandre – Santos,RenA (2185), Maringa BRA, 3rd Open, 2013.

6.e3 c6 7.Bc4 d5 8.Be2 cb5 9.ab5 Nbd7 10.c4 Nc5 (10...dc4 11.Bc4 Nb6 12.Be2=) 11.0-0 Bg4 12.d4 Nce4 13.c5 Nd7 14.b6 (better 14.Qc2+=) 14...Ndc5–/+ 15.dc5 (15.Bc3!?–/+) 15...Bb2 16.Ra2 Bg7 17.Qc2 Rc8 (17...Qd7!? 18.h3 Bf5–+) 18.Ra5=+ Qd7 (18...Qb6! 19.Qe4 de4 20.cb6 ef3 21.gf3 Bh3=+) 19.Nd4 Be2 20.Ne2 e5 21.Rd1 Rfd8 22.Nd2 Qe7 Increases the pressure on the backward pawn 23.Ne4 de4 24.Rd8 Qd8 25.Ra7?? (better 25.Nc3=) 25...Rc5 26.Ra8 Qa8 (26...Rc2!? 27.Rd8 Bf8 28.Kf1–+) 27.Qc5–/+ Qa1 28.Nc1 (better 28.Qc1!? Qc1 29.Nc1–/+) 28...Bf8–+ 29.Qc8 Kg7 30.g3 Ba3 31.Qb7 Bc1 32.Kg2 Qb2 33.Kh3? (33.Qe4 Qb6 34.Qe5 Qf6 35.Qd5–+) 33...Qf2 34.Qe4 Be3 35.Qe5 (35.b7 Qf1 36.Qg2 Qf5 37.g4 Qd3–+) 35...Kh6 36.b7 (36.Qe4 Bb6 37.Qg2–+) 36...Qf1 37.Kg4 (37.Kh4 f6 38.Qf6 Qf6 39.Kh3 Qf1 40.Kh4 Bg5 41.Kg4 Qf5) 37...f5 38.Kh4 (38.Qf5 Qf5 39.Kh4 g5) 38…g5 0–1. alessandrocarvalhaes – Horarsen (1660), lichess.org, 2017.

6.e3 d5 7.c4 (7.Be2 Bg4=) 7...c5 (7...dc4 8.Bc4 Nbd7 9.d4=) 8.cd5 (8.d4 Nbd7=) 8...Nbd7 (8...Qd5 9.d4=) 9.Qc2 Nd5 10.Bg7 Kg7 11.Bc4 (11.Be2 e5=) 11...Nb4 (11...N5f6 12.0-0=) 12.Qc3+= Nf6 13.0-0 Kg8 (13...Bf5 14.d3+=) 14.d3 b6 (14...Bf5 15.Ne5+=) 15.Nbd2 Bb7 (15...Bf5 16.e4 Bg4 17.Rfe1+=) 16.Rfd1 e6 (16...Qd6 17.d4+=) 17.Ne4 (17.Rac1 Rc8+=) 17...Be4 18.de4 Qe7 (18...Ne4? 19.Qe5 Qf6 20.Qe4+–) 19.Qe5 (19.Nd2 Rad8+=) 19...Rfd8 20.Qf4 Kg7 21.g4 (21.e5 Rd1 22.Rd1 Nfd5=) 21...h6= 22.h4 (22.g5 hg5 23.Ng5 Rd1 24.Rd1 Rh8+=) 22...h5 (22...Qb7 23.Nd2=) 23.g5 Ng4 24.Nh2 Nh2 25.Kh2 Kg8 (25...e5 26.Qf3=) 26.e5 Nd5 27.Qe4 (27.Qf3 Qc7 28.Qg3 Nc3 29.Rd8 Rd8=) 27...Nc3 28.Rd8 Rd8 (worse is 28...Qd8 29.Qc2 Nd5 30.Rd1+/–) 29.Qc2 Nd5 30.Rd1 Qc7 31.Qb2 (31.Kg1 Rd7 32.Qe4 Ne7=) 31...Ne7 32.Rd8 Qd8 33.Qe2 Nf5 34.Kh3 Kf8 ½–½. Krueger,Jan – Zylla,Johannes (2225), corr ICCF WSTT/3/06/2, 2006.

6.g3 d5 7.Bg2 c6 8.bc6 bc6 9.0-0 Nbd7 10.d3 (10.Na3 Nb6=) 10...Rb8+= 11.Ba3 (11.Bc3 Nc5+=) 11...Re8 12.Nbd2 Nb6 (12...e5 13.e4+=) 13.Rb1 (13.Bb2 Bg4=) 13...Bd7 (13...e5 14.Bc5+=) 14.c4= dc4 15.Nc4 Nc4 16.dc4 Qc7 17.Rb8 Qb8 18.Nd4 Qc7 (18...Qb6 19.Nb3=) 19.e3 (19.Qd2 Qb6+=) 19...Bf8 (19...c5 20.Nb5 Qb6 21.Qe2=) 20.Qd2 (20.Qf3 Rc8+=) 20...Rd8 (20...Rb8 21.f4=) 21.Rd1 (21.Nb3 Ra8+=) 21...Bg4= 22.f3 e5? (22...Bc8 23.f4 c5–+) 23.Bf8+/– Kf8 24.fg4+– ed4 25.ed4 Ng4+/– 26.d5 cd5 27.cd5 Re8 28.d6+/– Qc5 29.Kh1?? Nf2–+ 30.Kg1 Nd1 31.Kh1 Nf2 (31...Nf2 32.Qf2 Qf2 33.h4 Re2 34.Kh2 Qg2) 0–1. hsingletary (1750) – rudy (1725), net–chess.com, 2001.

6.g3 d6 7.c4 e5 8.d3 Re8 9.Bg2 Nbd7 10.0-0 Nc5 11.Nbd2 e4 12.de4 Nce4 (12...Nfe4 13.Bg7 Kg7 14.Ne4 Re4 15.Nd4=) 13.e3 Bg4 (13...Nc5 14.Nb3=) 14.Qc2 (14.h3 Nd2 15.Qd2 Ne4=) 14...Bf5 (14...Nc5 15.Nd4=) 15.Nd4 Ng3 (better is 15...Nd2!? 16.Qd2 Bc8=) 16.Nf5+/– Nf5 17.Bb7 Rb8 (17...Ra7 18.Bc6 Nd7 19.Nb3+/–) 18.Bc6 Rf8 19.Nb3 (better is 19.h3+/–) 19...Ne7? (better is 19...Ng4 20.h3 Nge3 21.fe3 Qg5 22.Kh1 Ng3 23.Kh2 Nf1 24.Rf1 Be5 25.Be5 Qe5 26.Kh1 Qe3+–) 20.Na5+– Nd7 21.Bg7 Kg7 22.Bg2 Nb6 23.Nc6 Nc6 24.Bc6 Nc8 25.a5 Na7 26.Bd5 Nc8 27.Qc3 Kg8 28.Rfb1 Qg5 29.Bg2 Re8 30.a6 Nb6 31.a7 Rbd8 32.Kh1 d5 33.c5 Na8 34.b6 (34...cb6 35.cb6 Nb6 36.Rb6+–) 1–0. CHED – StephenHilton, internet, 2006.

4.c4 Bg7

5.Bb2 d6 6.d4 0-0 7.Nf3 =.

5.d4 0-0 6.Nf3 d6 7.e3 =.

5.e3 0-0 6.d4 d6 7.Nf3 =.

5.Nf3 0-0 6.d4 c5 7.bc6 =.

4.e3 Bg7

5.Bb2 0-0 6.c4 c6 7.Nf3 cb5 8.ab5 b6 9.Be2 Bb7 10.0-0 d5 11.cd5 Qd5 12.Nc3 Qd8 13.Nd4 Nbd7 14.Bf3 Bf3 15.Qf3 Nc5 (15...Ne5 16.Qe2 Qd7 17.f4+=) 16.Rfd1+– Qc7 17.Nc6 e5 18.Nd5 (18.d4 e4 19.Qe2 Nb7+–) 18...Nd5+= 19.Qd5 Can e5 get defended? 19...Rad8 (19...e4 20.Bg7 Kg7 21.f3=) 20.Be5 (20.Nd8!? Rd8 21.Qc4+–) 20...Be5+= 21.Qe5 Qd7?? (better 21...Qe5 22.Ne5 Nb3+=) 22.d4 (better 22.Ne7 Qe7 23.Qe7+–) 22...Rfe8 (22...f6 23.Qf4 Ne6 24.Qf3+–) 23.Qg3 (better 23.Qf4 Ne6 24.Qf6+–) 23...Rc8?? (better 23...Ne4 24.Qh4 Ra8+–) 24.dc5 Qe6 (24...Qf5 25.cb6 Qb5+–) 25.cb6 Rc6 (25...Re7 26.Ne7 Qe7 27.Ra5+–) 26.bc6 Qc6 27.Rdb1 (27.Qc7 Qa8 28.b7 Qb8+–) 27...Qb7 (27...Re7 28.Qb8 Kg7 29.b7+–) 28.Ra5 (28.Qc7 Rb8 29.Qb7 Rb7 30.Ra5 Kg7+–) 28...Rc8 29.h3 Rc6 30.Ra7 Qc8 31.b7 Rc1 (31...Qd8 32.b8Q Rc8 33.Qgf4 Qd5 34.Qc8 Kg7 35.Qc3 Qe5 36.Qce5 Kg8 37.Qf7) 32.Rc1 Qc1 33.Kh2 Kg7 (33...Qb2 34.b8Q Qb8 35.Qb8 Kg7 36.Qf4 h5 37.Qf7 Kh6 38.Qf4 g5 39.Qd6) 34.b8Q (34.Qe5 Kh6 35.Qf4 Kg7 36.b8Q Qh1 37.Kh1 h6 38.Qf7) 34...Qc6 (34...Qc5 35.Qb2 Kh6 36.Qf4 Qg5 37.Qg7 Kg7 38.Qf7 Kh6 39.Qh7) 35.Qge5 Kh6 (35...Qf6 36.Qh8! Kh8 37.Qf6 Kg8 38.Ra8) 36.Rf7 (36.Qf8) 36...g5 (36...Qg2 37.Kg2 g5 38.Qbd6 Kh5 39.Rh7) 37.Qbd6 Qd6 38.Qd6 Kh5 39.Rh7 1–0. RichardSommer (2110) – moraj965 (2100), lichess.org, 2020.

5.Bb2 0-0 6.c4 d6 7.f4 (7.d4 e5=) 7...Nbd7 8.Nf3 b6 (8...e5 9.fe5 Ng4 10.Be2=) 9.Qc2 Nc5 10.d4 (10.Be2!?=) 10...Bf5=+ 11.Qd1 Nce4 (11...Ng4!? 12.Ra3 Ne4–/+) 12.Nbd2 Ng4 (12...e6 13.Ne4 Ne4 14.Bd3=) 13.Ne4 Ne3? (better is 13...Be4 14.Ra3 d5=) 14.Qe2 Nc4 15.Nf2 (15.Ng3 Be6+/–) 15...Nb2 16.Qb2 Rc8 17.Rc1 Re8 18.Be2 (18.Bc4 Bh6 19.g3 e6+–) 18...Bd7 (18...Qd7 19.Bd3+/–) 19.0-0 e6 20.Nd3 (20.Ne4 d5 21.Nc3 c5 22.bc6 Bc6+–) 20...Qf6 21.Qd2 c6 22.Nb2 Bh6 23.Ng5 cb5 24.Bb5 Bb5 25.ab5 e5 26.Rc8+– Rc8 27.Ne4 Qe6+/– 28.de5 de5 29.Qd6 ef4 30.Qe6 fe6 31.Nf6 Kg7 32.Nd7 Rc7 33.Nb6 Rc5 34.Nd3 Rb5 35.Nc4 a4 36.Ra1 Rd5 37.Nde5 Kf6 38.Ra4 Re5= 39.Ne5 Ke5 40.Kf2 Bf8 41.Kf3 g5 42.Kg4 h6 43.Ra8 Bg7 44.Rg8 Kf6 45.h3 e5 46.Kf3 h5 47.Ke4 g4 48.h4 Kf7 49.Rb8 Bf6 ½–½. Tischer,Joachim – Schutt, corr, 1973.

5.Bb2 0-0 6.Nf3 d6 7.Be2 =.

5.Nf3 Ne4 6.Ra2 d5 7.Bb2 =.

4.Nf3 Bg7

5.Bb2 0-0 6.e3 d5 7.Be2 =.

5.Nc3 0-0 6.e3 c5 7.Ba3 =.

5.d4 0-0 6.e3 d5 7.Bd3 =.

5.e3 Ne4 6.Ra2 0-0 7.Bb2 =.

3.Bb2 a4

4.a3 b6 5.c4+= Bb7 6.e3 e6 7.Nf3 Bb4?? (better 7...Ne4=) 8.ab4+– a3 (8...0-0 9.Ra4 Ra4 10.Qa4 Bf3 11.gf3+–) 9.Ra3 Ra3 10.Na3 0-0 11.Be2 Qe7 12.0-0 (12.Nc2 d6+–) 12...Qb4 13.Qa1 Qe7 14.Nc2 d5 (14...Rc8 15.Bf6 Qf6 16.Qf6 gf6 17.Ra1+–) 15.Ba3 Qd7 (15...Qd8 16.Bf8 Qf8 17.Qa7+–) 16.Bf8 Kf8 17.cd5 (17.Ne5 Qc8+–) 17...Nd5 18.Ncd4 c5 19.bc6 Nc6 20.Nc6 Qc6 (20...Bc6 21.Ne5 Qd6 22.Rc1+–) 21.Rc1 Qd7 22.Qa3 Kg8 (22...Qe7 23.Qa7 g5 24.Ng5 Qg5 25.Qb7+–) 23.Ne5 Qd8 (23...Qe8 24.Qa7 Bc8 25.Nf7+–) 24.d4 (better 24.Qa7 g5 25.Qb7 Qe7 26.Qb8 Kg7+–) 24...f6 (24...Qb8 25.Nd7 Qd8 26.Qa7+–) 25.Nc6 (25.Qa7 fe5 26.Qb7 Qe7 27.Qb8 Kf7+–) 25...Qe8 (25...Bc6 26.Rc6 Kf7 27.Ba6+–) 26.Qd6 Bc6 27.Qc6 (better 27.Rc6 h6 28.Bg4+–) 27...h5 (27...Qc6 28.Rc6 Kf7+–) 28.Qe8 Kh7 29.Qh5 Kg8 30.Rc8 1–0. BeepBeepImAJeep (2630) – taleguito (2055), lichess.org, 2015.

4.a3 e5 5.c4 (5.Be5 d5+=) 5...c5 (better 5...d5!?=) 6.Be5+– d5 7.e3 d4 (7...Nbd7 8.Bb2+=) 8.Nf3 (8.ed4 cd4 9.Qe2 Bg4+–) 8...Nbd7 (8...de3!? 9.fe3 Bd6+–) 9.ed4+– Ne5 10.de5 (10.Ne5? Qd4 11.Nf7 Kf7–+) 10...Ng4 11.Be2 (11.Nc3 f6+–) 11...Be7 (11...Qc7 12.b6 Qb6 13.Nc3+–) 12.h3 (12.d4 cd4 13.h3 Nh6 14.Qd4 Qd4 15.Nd4 f6+–) 12...Nh6 (better 12...Ne5!? 13.Ne5 Qd4 14.Nf7 0-0+=) 13.Nc3+– Nf5 14.Na4 Nd4 15.Nc3 Ne2 (15...Bf5 16.Nd4 Qd4 17.0-0+–) 16.Qe2 (worse 16.Ke2 Be6 17.Qb3 f6+–; 16.Ne2?! Qd3+–) 16...Be6 17.a4 Bg5 (17...0-0 18.0-0+–) 18.0-0 0-0 19.Rfd1 Bh6 20.d4 Bf5 (20...cd4 21.Nd4 Qb8 22.Qe4+–) 21.d5 (21.dc5 Qa5 22.Nd5 Be6+–) 21...g5 (21...Re8 22.d6+–) 22.Ne4 g4 (22...Be4 23.Qe4 f5 24.Qe3+–) 23.hg4 Bg4 (23...Be4 24.Qe4 Re8+–) 24.Nf6 Kh8 25.Ng4 (better 25.Qe4 Qf6 26.ef6+–) 25...Qg5 (25...Bg7+–) 26.Ng5 Bg5 27.Qe4 Kg7 28.f4 (28.Qf5 h6+–) 28...f6 29.fg5 fg5 1–0. BeepBeepImAJeep (2710) – CatsAreAwesome (1800), lichess.org, 2017.

4.a3 g6 5.c4 Bg7 6.Nc3 c6 7.Na4 cb5 8.cb5 0-0 9.Nc3 d6 10.d4 Qa5 11.Nf3 Nd5 (11...Ne4 12.Rc1=) 12.Qd2 (12.Qd3+–) 12...Bh6? (better 12...Nc3!? 13.Qc3 Qb5=) 13.e3+– Nc3 14.Bc3 Qb6 15.Bd3 Bg4 16.Be2 Nd7 17.0-0 Rac8 (17...Nf6 18.Rfc1+–) 18.Rfb1 Nf6 19.a4?? (better 19.Ba5 Qa7 20.b6+–) 19...Ne4=+ 20.Ba5 Nd2 21.Bb6 Nb1 22.Rb1 Bf5 23.Ra1 Rc2 24.Bd1 Rc3 25.h3 Rfc8 26.Kh2 Rc1 27.Rc1 Rc1 28.Bb3 Be6 (28...e6 29.g4 Bd3 30.Kg3=+) 29.d5 (29.Be6 fe6 30.g4 Ra1=+) 29...Bf5=+ 30.a5 (30.Kg3=+) 30...Rb1 (30...Bd3 31.Nd4–/+) 31.Ba4 (better 31.Nd2 Ra1 32.Bc4=) 31...Rb4 32.Bd1 Rb5 (32...Be4 33.Be2–/+) 33.Kg3 (33.Nd4!? Rb2 34.Nf5 gf5 35.Kg3–/+) 33...Be4 34.Be2 Bd5?? (34...Rd5 35.Nd4 Rg5 36.Bg4–+) 35.Nd4?? (better 35.Bb5 Bg7 36.Nd2+–) 35...Rb2–+ 36.Bg4 (36.Bf3 Bf3 37.Nf3 Bg7–+) 36...Bg7 37.h4 (37.Ne2 Bc4 38.Ng1 Bf1–+) 37...Bd4 (better 37...Be5 38.Kh3–+) 38.Bd4 Rb4 39.Bb6 (39.Bh3 f5–+) 39...Bc4 (better 39...Bg2!? 40.f4 Bd5 41.Bd7–+) 40.Bf3 f5 (better 40...d5–+) 41.Kf4? (better 41.Bb7!? e5 42.Bc6–/+) 41...d5 (41...Bd5! 42.Kg3 Bf3 43.gf3–+) 42.Ke5 Kf7 43.Bd5 e6?? (better 43...Bd5 44.Kd5 Rh4–+) 44.Be6?? (better 44.Bb7 h6 45.Kd6+=) 44...Be6–+ 45.Kd6 (45.g3 Rb2 46.f3 Bd7–+) 45...Rb5 (45...Rh4 46.g3 Rb4 47.Ke5–+) 46.Kc7 (46.g4–+) 46...Rb4 (better 46...Bd5!? 47.f3–+) 47.Kb7?? (47.Kd6 Rh4 48.g3–+) 47...Rc4 (better 47...Bd5 48.Kb8–+) 48.a6 (48.g3 Rc2–+) 48...Bd5 (48...Bc8 49.Ka7–+) 49.Ka7 (49.Kb8 Rh4 50.g3 Rb4–+) 49...Be4 (better 49...Ra4 50.Bd4 Bc4 51.Kb6 Ra6 52.Kc5–+) 50.Bd4 1–0. alessandrocarvalhaes (1795) – Beginnoob (2005), lichess.org, 2020.

4.c4 d5 5.cd5 Qd5 6.Bf6 ef6 7.Nc3 Qe5 8.Nf3 Qc5 9.e3 Be6 10.Na4 Qa3 11.Nc3 Bb4 12.Qc1 Bc3 13.Qc3 Qc3 14.dc3 Ra2 15.Ra2 Ba2 16.c4 Ke7 17.Bd3 Rd8 18.Ke2 Nd7 19.Ra1 Ra8 (19...Nc5 20.Ra2 Rd3 21.Nd4+=) 20.Ne1 (20.Ke1!? Nb6 21.Nd2+/–) 20...Nb6 21.c5 Nd5 (21...Nd7 22.Rc1+=) 22.Kd2 Nb4 23.Bb1 (23.Kc3 Nd3 24.Nd3 Ra3 25.Kd2 Ra8+/–) 23...Rd8+= 24.Kc3 Bb1 25.Kb4 Bf5 26.Nf3 Be4 27.Kc3 Rd3 28.Kc4 Rd8 29.Ra7 Rb8 (better is 29...f5+=) 30.c6?? (30.Nh4 h5+/–) 30...Kd6 (better is 30...bc6!? 31.Nd4 Kd6 32.bc6 Bd5 33.Kc3 g6+=) 31.cb7 Rb7 32.Rb7 Bb7 33.Ne1 g5 34.g3 Ke5 35.Kd3 Be4 36.Kc3 Bb7 37.f3 h5 38.h3 Bc8 39.g4 hg4 40.hg4 f5 41.gf5 Bf5 42.Kc4 g4 43.fg4 Bg4 44.Kc5 Bd7 45.Nc2 Ke4 46.b6 cb6–/+ 47.Kb6 Kd3 48.Kc7 Bf5 49.Nd4= Be4 50.Kd6 Ke3 51.Ke7 Kd4 52.Kf7 ½–½. tyop (1825) – mitica00 (1720), playok.com, 2012.

4.a3 d5

5.e3 Nbd7 6.Nf3 e6 7.c4 Nb6 8.cd5 Nfd5 9.Be2 Nd7 10.0-0 Nc5 (10...N7f6 11.Be5+=) 11.d4 (11.Nc3 Nc3 12.dc3 Bd6+=) 11...Nb3 12.Ra2 Bd6 13.Nfd2 (13.e4 Nf4+=) 13...Nd2 14.Qd2 (14.Nd2 0-0=) 14...Qh4 (14...0-0 15.Nc3=) 15.g3 Qh3 (15...Qe4 16.Nc3 Nc3 17.Qc3=) 16.Bf3 (better is 16.e4 Nb6 17.e5+=) 16...b6?? (better is 16...Bd7 17.Bg2 Qh5=+) 17.Bg2 (17.e4 Nf6 18.Bg2 Qh5+=) 17...Qh6 18.Nc3 (18.e4 Nf4 19.e5 (19.gf4?? Bf4 20.Qf4 Qf4–+) 19...Ng2 20.Qh6 (< 20.Kg2 Qd2 21.Nd2 Be7=+) 20...gh6 21.ed6+/–) 18...Bb7+= 19.Nd5 Bd5 20.Bc1 (20.Bd5 ed5 21.Rc1 0-0=) 20...Rc8 (20...Qh5!?–/+) 21.e4 (better is 21.Bd5 ed5 22.Qc2+=) 21...Ba2 22.Qh6?? (22.Qa2 Qg6 23.e5=) 22...gh6–+ 23.Bh6 Bc4 24.Rc1 Bb3 25.Rc6 Ba3 26.e5 Bf8 27.Bg5 Be7 28.Bf6 Bf6 29.ef6 Rg8 30.h4 Rg6 31.Be4 Rf6 32.Bh7 Ke7 33.Be4 a3 34.Bc2 a2 35.Bb3 a1Q 36.Kg2 Qb2 37.Rc2 Qb3 38.Re2 Qd3 39.Kf1 Ra8 (40.Kg2 Qf3 41.Kh2 Ra1 42.Re6 Re6 43.h5 Rh1) 0–1. ZMeB4 (1685) – 0202 (1630), caissa.com, 2007.

4.c4 e6

5.a3 c6 6.Nc3 cb5 7.Nb5 Nc6 8.Qc2 A) 8...d5 A1) 9.cd5 ed5 10.Nf3 Be7 11.e3 0-0 12.Bd3 g6 13.0-0 Bg4 14.Nbd4 Qd7; A2) 9.e3 Be7 10.cd5 ed5 11.Nf3 0-0 12.Bd3 g6 13.0-0 Bg4 14.Nbd4 Qd7; A3) 9.Rc1 Be7 10.Nf3 0-0 11.e3 Ne4 12.Be2 Bd7 13.0-0 Qb6 14.Rb1 f5; A4) 9.h4 Be7 (9...Bd7 10.Nf3 Na5 11.Qa4 Rc8 12.d3 Nc4 13.dc4 Rc4 14.Qb3 Qa5; 9...dc4 10.Nf3 Na5 11.Be5 Nd5 12.e4 Bd7 13.Nfd4 Nc6 14.Nc6 bc6; 9...Ne4 10.Nf3 Bd7 11.h5 h6 12.Rc1 Na5 13.cd5 Bb5 14.Qe4 Qd5; 9...h6 10.Nf3 Be7 11.e3 0-0 12.Rc1 Ne4 13.Bd3 f5 14.h5 Bd7; 9...Qb6 10.Nf3 dc4 11.Qc4 Be7 12.e3 0-0 13.Be2 Nd5 14.0-0 Bd7) 10.h5 h6 11.Nf3 0-0 12.e3 Bd7 13.Rc1 Na5 14.cd5 ed5; A5) 9.Nf3 Be7 10.cd5 ed5 11.e3 0-0 12.Bd3 g6 13.0-0 Bg4 14.Nbd4 Qd7; B) 8...Be7 B1) 9.Nf3 d5 (9...0-0 10.e3 d5 11.Be2 Bd7 12.Rb1 Na5 13.cd5 ed5 14.0-0 Ne4) 10.cd5 ed5 11.e3 0-0 12.Bd3 g6 13.0-0 Bg4 14.Nbd4 Qd7; B2) 9.h3 d5 (9...0-0 10.Nf3 d5 11.e3 Na5 12.cd5 Nb3 13.Rd1 ed5 14.Nfd4 Be6) 10.Nf3 0-0 11.e3 Ne4 12.Be2 f5 13.0-0 dc4 14.Bc4 Bd7; B3) 9.Rc1 0-0 (9...d5 10.Nf3 0-0 11.e3 Ne4 12.Be2 Bd7 13.0-0 Qb6 14.h3 Rfc8) 10.Nf3 d5 11.e3 Ne4 12.Be2 Bd7 13.0-0 Qb6 14.Rb1 f5; B4) 9.g4 h6 (9...Qb6 10.g5 Ng4 11.e3 0-0 12.Nf3 f6 13.Bd3 Kh8 14.Bh7 d5; 9...0-0 10.g5 Ne8 11.Nf3 Bg5 12.Ng5 Qg5 13.h4 Qg6 14.Qc3 d5; 9...d5 10.g5 Nh5 11.e3 0-0 12.Be2 g6 13.Qc3 f6 14.Nf3 Bd7) 10.Nf3 d5 11.h4 Kf8 12.Bh3 Qb6 13.0-0 Kg8 14.d3 e5; B5) 9.e3 0-0 (9...d5 10.cd5 ed5 11.Nf3 0-0 12.Bd3 g6 13.0-0 Bg4 14.Nbd4 Qd6) 10.Nf3 d5 11.Be2 Bd7 12.h4 h6 13.0-0 Na5 14.cd5 Bb5.

5.a3 c6 6.Nc3 cb5 7.Nb5 Nc6 8.Nf3 Be7 (8...d5 9.Bf6 (9.cd5 ed5 10.Bf6 gf6 11.e3 Bg4 12.h3 Bf5 13.Nbd4 Bd7 14.Qc2 Nd4; 9.e3 Be7 10.Be2 0-0 11.0-0 Bd7 12.Rb1 Ne4 13.Qc2 Na5 14.d3 Bb5; 9.g3 Be7 10.Qc2 0-0 11.e3 Ne4 12.Be2 f5 13.0-0 dc4 14.Bc4 Bd7; 9.Rc1 Be7 10.e3 0-0 11.Be2 Ne4 12.0-0 Qb6 13.Qc2 Bd7 14.Rb1 f5) 9...gf6 10.e3 Bg7 11.cd5 ed5 12.Rc1 0-0 13.Bd3 Ne5 14.Qc2 Nd3; 8...Bc5 A) 9.e3 0-0 10.Qc2 d6 11.d4 Bb6 12.Bd3 Ba5 13.Nc3 e5 14.0-0 ed4; B) 9.Qc2 d6 (9...0-0 10.e3 Qe7 11.Be2 d6 12.0-0 Bd7 13.Bf6 gf6 14.Rfb1 Na5; 9...h6 10.e3 0-0 11.Be2 Be7 12.0-0 d5 13.Rab1 Bd7 14.h3 dc4; 9...Na5 10.Be5 d6 11.Bf6 gf6 12.Qa4 0-0 13.d4 Bb6 14.e3 Qe7; 9...Ra6 10.e3 0-0 11.Be2 b6 12.0-0 Bb7 13.h3 h6 14.Rab1 Ra8; 9...g6 10.e3 0-0 11.Be2 Be7 12.0-0 d5 13.h3 Bd7 14.Rac1 Ne4; 9...h5 10.e3 0-0 11.Be2 Be7 12.Ng5 g6 13.Bd3 e5 14.f4 d6) 10.d4 Bb6 11.e3 Ba5 12.Nd2 0-0 13.Bd3 Qe7 14.0-0 Bd7; C) 9.d4 Be7 (9...Bb6 10.Nd6 Kf8 11.Qd2 Ba5 12.Bc3 Bc7 13.Nb5 Ne4 14.Qc2 Nc3; 9...Ba7 10.Nd6 Ke7 11.c5 Bb8 12.e4 Qa5 13.Qd2 Qd2 14.Nd2 Bc7; 9...Bf8 10.e3 d5 11.Qc2 Be7 12.Bd3 0-0 13.0-0 dc4 14.Bc4 Bd7) 10.d5 ed5 11.cd5 Ra5 12.Qd3 Qb6 13.e3 Na7 14.Na7 Ra7) 9.e3 (9.Qc2 0-0 (9...d5 10.cd5 ed5 11.e3 0-0 12.Bd3 h6 13.0-0 Bg4 14.Nbd4 Nd4) 10.e3 d5 11.Bd3 dc4 12.Bc4 Na5 13.Qa4 Nc4 14.Qc4 Bd7) 9...0-0 (9...d5 10.Be2 0-0 11.0-0 Bd7 12.Rb1 dc4 13.Bc4 Nd5 14.Qc2 Rc8) 10.Qc2 (10.Be2 d5 11.0-0 Bd7 12.Rb1 Ne4 13.Qc2 Qb6 14.h3 f5) 10...d5 11.Be2 Bd7 (11...Na5 12.cd5 ed5 13.Qa4 Bd7 14.Bd4 Ne4) 12.Rc1 Na5 (12...Ne4 13.0-0 Qb6 14.Rb1 f5) 13.cd5 Nd5 (13...ed5 14.Nfd4 Rc8) 14.Qa4 Nb6 (14...f5+/–) 15.Qe4 Rc8 16.Rc8 Qc8? (better is 16...Nc8 17.0-0 Bb5+/–) 17.Qd4+– Bc5 (17...Bf6 18.Qb6 Bb2 19.Qa5 Qc1 20.Bd1 Qc5+–) 18.Qg7 1–0. usingprogram – 1ominut, internet, 2011.

5.a3 c6 6.Nc3 cb5 7.Nb5 Be7 8.e4 (8.Nf3 0-0=) 8...0-0 9.e5 Ne8 10.Nc3 Qa5 11.f4 f6 12.ef6 Nf6 13.Bd3 d5 14.g3 e5 15.fe5+/– Ng4 16.Nd5+– Bc5 17.Nh3 Nc6 18.Qc2 Nge5 19.Bh7 Kh8 20.Nhf4 Bg4 21.Be5+– Ne5 22.Be4 Rae8 23.Kf1 g5 24.h3= Bd7 25.Kg2 Nc6?? (Better is 25...gf4 26.Nf4 b5–/+) 1–0. Niculae,C – Bach,Gino (2105), Bucharest op, 1995.

5.a3 d5 6.cd5 ed5 7.Nc3 =+.

5.Nc3 a3 6.Bc1 d5 =+.

5.a3 b6

6.Qc2 Bb7 A) 7.Nf3 d5 (7...d6 8.Nc3 Nbd7 9.d4 Qe7 10.Rd1 g6 11.e4 Bh6 12.Bd3 0-0; 7...Be7 8.Nc3 d6 9.e3 0-0 10.d4 Nbd7 11.Bd3 e5 12.0-0 g6; 7...g6 8.Nc3 Bg7 9.g3 0-0 10.Bg2 d5 11.cd5 ed5 12.0-0 c5; 7...Bd6 8.Nc3 Qe7 9.e3 0-0 10.Be2 h6 11.0-0 Re8 12.Na4 e5) 8.e3 Nbd7 9.Nc3 Bd6 10.cd5 ed5 11.Be2 0-0 12.Na4 Qe7 ; B) 7.e3 d5 (7...d6 8.Nc3 Nbd7 9.d4 d5 10.Nf3 Bd6 11.Bd3 dc4 12.Bc4 0-0; 7...Be4 8.d3 Bb7 9.Nc3 Bd6 10.Nf3 0-0 11.Be2 Re8 12.Na4 Be7; 7...Ne4 8.Nc3 Nc5 9.Nf3 Bd6 10.d4 Nb3 11.Rd1 Qe7 12.Na4 Ra4; 7...h5 8.Nc3 d6 9.Nf3 Nbd7 10.d4 Be7 11.Bd3 h4 12.h3 Ra7) 8.Nf3 Bd6 9.Nc3 0-0 10.cd5 ed5 11.Be2 Nbd7 12.Na4 Qe7; C) 7.Nc3 d6 (7...d5 8.Nf3 Bd6 9.cd5 ed5 10.e3 0-0 11.Be2 Nbd7 12.0-0 Qe7; 7...Bd6 8.Nf3 0-0 9.e3 Be7 10.Be2 d6 11.0-0 Nbd7 12.d4 h6; 7...h6 8.Nf3 d6 9.d4 Nbd7 10.e4 Nh5 11.g3 Be7 12.Bg2 0-0; 7...g6 8.Nf3 d6 9.g3 Nbd7 10.Bg2 Ne5 11.Na4 Nf3 12.Bf3 Bf3) 8.Nf3 Nbd7 9.d4 Qe7 10.e3 g6 11.Bd3 Bg7 12.e4 e5.

6.Qc2 d6 A) 7.Nf3 Nbd7 (7...Bb7 8.Nc3 Nbd7 9.d4 Qe7 10.e4 g6 11.Bd3 Bg7 12.0-0 0-0; 7...Be7 8.d4 Nbd7 9.Nc3 Bb7 10.e3 0-0 11.Bd3 g6 12.0-0 e5; 7...g6 8.g3 Bb7 9.Bg2 Nbd7 10.Nc3 Ne5 11.Na4 Nf3 12.Bf3 Bf3; 7...h6 8.d4 Bb7 9.Nc3 Be7 10.e3 Nbd7 11.Bd3 0-0 12.0-0 Ra7) 8.d4 Bb7 9.Nc3 Qe7 10.Rd1 g6 11.g3 Bg7 12.Bg2 0-0; B) 7.d4 g6 (7...Nbd7 8.Nc3 g6 9.Nf3 Bg7 10.g3 Bb7 11.Bg2 0-0 12.0-0 Qe7; 7...Bb7 8.Nc3 g6 9.Nf3 Nbd7 10.e4 Bg7 11.Bd3 0-0 12.0-0 e5; 7...Qe7 8.Nf3 Nbd7 9.Nc3 Bb7 10.e4 g6 11.Bd3 Bg7 12.0-0 0-0; 7...c5 8.dc5 dc5 9.Nc3 Bb7 10.Nf3 Nbd7 11.Rd1 Qc7 12.e3 Bd6) 8.Nc3 Nbd7 9.Nf3 Bg7 10.g3 0-0 11.Bg2 Bb7 12.0-0 Qe7 ; C) 7.e3 Nbd7 (7...Be7 8.Nc3 0-0 9.Nf3 Bb7 10.d4 Nbd7 11.Bd3 g6 12.0-0 e5; 7...Bb7 8.Nc3 Nbd7 9.d4 g6 10.Nf3 Bg7 11.Be2 0-0 12.Rd1 Qe7; 7...e5 8.Be2 Nbd7 9.Nc3 Nc5 10.Bf3 Ra7 11.Nge2 Be6 12.d4 e4; 7...g6 8.Nc3 Nbd7 9.Nf3 Bb7 10.Na4 Bg7 11.Be2 0-0 12.0-0 e5) 8.d4 Be7 9.Nf3 0-0 10.Nc3 Bb7 11.Bd3 g6 12.0-0 e5; D) 7.Nc3 Bb7 (7...Nbd7 8.d4 Qe7 9.Nf3 Bb7 10.Rd1 g6 11.g3 Bg7 12.Bg2 0-0; 7...Be7 8.Nf3 Bb7 9.e3 0-0 10.d4 Nbd7 11.Bd3 g6 12.0-0 e5; 7...h6 8.Nf3 Nbd7 9.d4 Be7 10.e3 0-0 11.Bd3 Bb7 12.0-0 Ra7; 7...g6 8.Nf3 Bb7 9.e4 Bg7 10.d4 0-0 11.Bd3 Nbd7 12.0-0 e5) 8.Nf3 Nbd7 9.d4 Qe7 10.e3 g6 11.Bd3 e5 12.e4 ed4.

6.Qc2 Bd6 A) 7.e3 Bb7 (7...0-0 8.Nf3 Bb7 9.Nc3 Be7 10.Be2 d6 11.0-0 Nbd7 12.d4 h6; 7...Qe7 8.Nc3 0-0 9.Nf3 Bb7 10.Be2 h6 11.0-0 Re8 12.Nd4 c5; 7...g6 8.Nf3 0-0 9.Nc3 Bb7 10.Be2 Be7 11.0-0 d6 12.Na4 Nbd7; 7...Be7 8.Nc3 Bb7 9.Nf3 0-0 10.Be2 d6 11.0-0 Nbd7 12.d4 h6) 8.Nc3 Ng4 9.Nf3 0-0 10.Na4 f5 11.c5 Be7 12.h3 Nf6; B) 7.Nc3 0-0 (7...Bb7 8.Nf3 0-0 9.e3 Be7 10.Be2 d6 11.0-0 Nbd7 12.d4 h6; 7...e5 8.Nf3 Bb7 9.e4 0-0 10.Bd3 Re8 11.0-0 Nh5 12.Na4 Nf4; 7...h6 8.Na4 0-0 9.c5 Be7 10.Nf3 d5 11.Ne5 Nbd7 12.Nc6 Qe8; 7...h5 8.Nf3 Bb7 9.e3 h4 10.h3 Rh5 11.Be2 Kf8 12.0-0 Kg8) 8.Nf3 Bb7 9.e3 Be7 10.Be2 d6 11.0-0 Nbd7 12.d4 h6; C) 7.e4 Bc5 (7...Nh5 8.Nf3 Bb7 9.Nc3 0-0 10.g3 g5 11.h3 f5 12.Be2 Bg3; 7...Be7 8.Nf3 d6 9.Nc3 Nbd7 10.d4 0-0 11.Be2 Bb7 12.0-0 h6; 7...Ng4 8.Nf3 Bb7 9.h3 Nh6 10.Bg7 Rg8 11.Bh6 f5 12.e5 Bf3; 7...e5 8.Nf3 0-0 9.Nc3 Re8 10.Bd3 Bb7 11.0-0 Nh5 12.Na4 Nf4) 8.d4 Be7 9.Nf3 0-0 10.Nc3 Bb7 11.Bd3 Nh5 12.Bc1 d6; D) 7.h4 Bb7 (7...0-0 8.Nc3 Bb7 9.Nf3 e5 10.e3 Qe7 11.Be2 h6 12.Na4 Re8; 7...Qe7 8.Nc3 0-0 9.Nf3 Bb7 10.e3 Ng4 11.Na4 f5 12.Be2 Ra7; 7...g6 8.Nf3 Bb7 9.Nc3 0-0 10.Na4 Qe7 11.e3 Be4 12.d3 Bb7; 7...e5 8.Nc3 Bb7 9.Nf3 e4 10.Nd4 Be5 11.e3 0-0 12.Na4 c5) 8.Nf3 Qe7 9.Nc3 0-0 10.e3 Ng4 11.Na4 f5 12.Bd3 Ra5; E) 7.Nf3 Bb7 (7...g6 8.Nc3 Bb7 9.e4 Be7 10.d4 0-0 11.Bd3 d6 12.0-0 Nbd7; 7...0-0 8.Nc3 Bb7 9.e3 Be7 10.Be2 d6 11.0-0 Nbd7 12.d4 h6; 7...Ra5 8.e3 Bb7 9.Nc3 0-0 10.Be2 Qe7 11.Na4 h6 12.0-0 e5; 7...Ra7 8.Nc3 Bb7 9.e3 0-0 10.Be2 h6 11.Na4 Qe7 12.0-0 e5) 8.Nc3 0-0 9.e3 Be7 10.d4 c5 11.Bd3 cd4 12.ed4 d5.

6.Qc2 Be7 A) 7.Nc3 0-0 (7...d5 8.Nf3 0-0 9.cd5 ed5 10.e3 Qd6 11.d4 c5 12.dc5 bc5; 7...d6 8.Nf3 Bb7 9.e3 Nbd7 10.d4 0-0 11.Bd3 g6 12.0-0 e5; 7...Bb7 8.Nf3 0-0 9.e3 g6 10.Be2 d6 11.0-0 Nbd7 12.d4 e5; 7...g6 8.Nf3 0-0 9.g3 d5 10.Bg2 Nbd7 11.Na4 Bb7 12.cd5 ed5) 8.g3 Bb7 9.Nf3 d5 10.cd5 Nd5 11.Bg2 Nd7 12.Na4 Ra5; B) 7.e3 d5 (7...0-0 8.Nc3 d6 9.Nf3 e5 10.Be2 Nbd7 11.d4 Bb7 12.0-0 Ra5; 7...Bb7 8.Nc3 0-0 9.Nf3 d5 10.cd5 ed5 11.Be2 Bd6 12.0-0 Nbd7; 7...d6 8.Nc3 0-0 9.Nf3 Nbd7 10.d4 Bb7 11.Bd3 g6 12.0-0 e5; 7...g6 8.Nc3 0-0 9.Nf3 d5 10.Na4 Nbd7 11.cd5 ed5 12.Be2 Bb7) 8.Nc3 0-0 9.cd5 ed5 10.Nf3 Qd6 11.Na4 Nbd7 12.Be2 Ne4; C) 7.h4 Bb7 (7...d6 8.Nc3 Bb7 9.Nf3 Nbd7 10.Na4 0-0 11.e3 h6 12.Be2 Ng4; 7...0-0 8.Nf3 d6 9.Nc3 Nbd7 10.Na4 Bb7 11.e3 h6 12.Be2 Ng4; 7...d5 8.Nf3 Nbd7 9.Nc3 0-0 10.Na4 Bb7 11.cd5 Bd5 12.e3 Ne4; 7...h6 8.Nf3 0-0 9.Nc3 Bb7 10.g3 d6 11.Bg2 Nbd7 12.Na4 Ra5) 8.Nc3 d6 9.Nf3 Nbd7 10.Na4 0-0 11.e3 h6 12.Be2 Ng4; D) 7.d3 d5 (7...0-0 8.Nc3 Bb7 9.Nf3 d5 10.cd5 Nd5 11.e4 Nc3 12.Bc3 Nd7; 7...Bb7 8.Nf3 d6 9.Nc3 Nbd7 10.g3 Nc5 11.Bg2 0-0 12.0-0 d5; 7...d6 8.g3 Bb7 9.Nf3 Nbd7 10.Bg2 Nc5 11.Nc3 Nb3 12.Rd1 Nd4; 7...h6 8.Nf3 0-0 9.Nc3 d5 10.cd5 ed5 11.e4 Bb7 12.e5 Nh5) 8.Nf3 0-0 9.Nc3 Nbd7 10.Na4 dc4 11.Qc4 Bb7 12.h3 Ne8 ; E) 7.Nf3 0-0 (7...d5 8.cd5 ed5 9.Nc3 0-0 10.e3 Bb7 11.Na4 Bd6 12.Be2 Qe7; 7...Bb7 8.Nc3 d6 9.e3 Nbd7 10.d4 e5 11.Bd3 0-0 12.0-0 g6; 7...d6 8.Nc3 0-0 9.e3 h6 10.d4 c5 11.bc6 Nc6 12.Bd3 Bd7; 7...g6 8.Nc3 Bb7 9.g3 d6 10.Bg2 Nbd7 11.Na4 0-0 12.0-0 Ra7 ) 8.Nc3 d5 9.cd5 ed5 10.e3 Nbd7 11.Na4 Ne4 12.Be2 Bd6.

6.Qc2 g6 A) 7.Nc3 d6 (7...Bb7 8.Nf3 Bg7 9.g3 d6 10.Bg2 Nbd7 11.Na4 0-0 12.0-0 Ra5; 7...Bg7 8.g3 0-0 9.Bg2 d5 10.Nh3 Bb7 11.0-0 Nbd7 12.d4 Ra7; 7...Be7 8.Nf3 0-0 9.g3 Bb7 10.Bg2 d5 11.cd5 ed5 12.0-0 Nbd7; 7...Bh6 8.Nf3 0-0 9.h4 Bg7 10.Na4 Bb7 11.g3 d6 12.Bg2 Nbd7) 8.Nf3 Nbd7 9.g3 Bg7 10.Bg2 Bb7 11.Na4 0-0 12.0-0 Ra7; B) 7.Nf3 Bb7 (7...Bg7 8.Nc3 0-0 9.g3 d5 10.Bg2 Bb7 11.cd5 Nd5 12.Na4 Bb2; 7...Bd6 8.Nc3 Bb7 9.e3 0-0 10.Be2 Be7 11.0-0 d6 12.Na4 Ra7; 7...Be7 8.Nc3 Bb7 9.g3 d5 10.cd5 ed5 11.Bg2 0-0 12.0-0 Nbd7; 7...Bh6 8.g4 g5 9.h4 Rg8 10.hg5 Bg5 11.Ng5 Rg5 12.Rh6 Rg6) 8.Nc3 d6 9.g3 Nbd7 10.Bg2 Bg7 11.0-0 0-0 12.Na4 Ra5 ; C) 7.e4 d6 (7...Bg7 8.Nc3 Bb7 9.Nf3 0-0 10.d4 d6 11.Be2 Nbd7 12.Rd1 Qe7; 7...Bb7 8.Nc3 d6 9.Nf3 Bg7 10.d4 0-0 11.Bd3 Nbd7 12.0-0 e5; 7...Be7 8.Nc3 d6 9.Nf3 0-0 10.Be2 Nbd7 11.d4 e5 12.0-0 Bb7; 7...Bh6 8.e5 Nh5 9.Nc3 Bb7 10.Nf3 0-0 11.c5 bc5 12.Ne4 d6) 8.Nc3 Bh6 9.Nf3 Nbd7 10.d4 0-0 11.Be2 Bb7 12.0-0 Re8 ; D) 7.h4 d6 (7...Bb7 8.Nc3 Bg7 9.Nf3 d6 10.d4 Nbd7 11.e3 0-0 12.Be2 Re8; 7...Bg7 8.Nc3 Bb7 9.Nf3 d6 10.e3 0-0 11.Be2 Nbd7 12.0-0 Ng4; 7...Be7 8.Nc3 Bb7 9.Nf3 0-0 10.g3 d5 11.cd5 ed5 12.Bg2 d4; 7...Qe7 8.h5 gh5 9.Rh5 Rg8 10.Rh4 h5 11.Nc3 Rg4 12.Nf3 Bb7) 8.Nf3 Bb7 9.Nc3 Bg7 10.d4 Nbd7 11.e3 0-0 12.Be2 Re8 ; E) 7.e3 Bb7 (7...Qe7 8.Nc3 Bb7 9.Nf3 Bg7 10.Be2 0-0 11.0-0 d6 12.Na4 e5; 7...d6 8.Nc3 Bg7 9.Nf3 Bb7 10.Be2 Nbd7 11.0-0 e5 12.Na4 0-0; 7...Bg7 8.Be2 d6 9.Nc3 0-0 10.Nf3 Nbd7 11.0-0 Bb7 12.Na4 e5; 7...Be7 8.Nc3 0-0 9.Nf3 d5 10.Na4 Nbd7 11.Be2 Bb7 12.0-0 c5) 8.Nc3 Bg7 9.Nf3 d6 10.Be2 Nbd7 11.0-0 0-0 12.Na4 e5.

6.Nc3 Bb7 7.Nf3 (7.Qc2 d6 (7...Be7 8.Nf3 0-0 9.e3 d5 10.cd5 Nd5 11.Bd3 f5 12.0-0 Nd7 ; 7...h6 8.Nf3 d6 9.d4 Be7 10.e3 Nbd7 11.Bd3 0-0 12.0-0 e5; 7...g6 8.Nf3 d6 9.e3 Nbd7 10.d4 Bg7 11.Be2 0-0 12.0-0 e5; 7...Bd6 8.Nf3 0-0 9.g3 Ng4 10.Na4 Ne5 11.Bg2 Bf3 12.Bf3 Nf3) 8.Nf3 Be7 9.d4 0-0 10.e3 Nbd7 11.Bd3 g6 12.0-0 e5; 7.e3 d5 (7...d6 8.Na4 Nbd7 9.Nf3 Be7 10.Be2 0-0 11.0-0 Ne4 12.Qc2 h6 ; 7...Be7 8.Nf3 0-0 9.Na4 h6 10.Be2 d6 11.0-0 Nbd7 12.Qc2 Ne4; 7...Bd6 8.Nf3 0-0 9.Be2 e5 10.0-0 e4 11.Nd4 g6 12.f4 Re8; 7...e5 8.Nf3 d6 9.Be2 Be7 10.0-0 0-0 11.Qc2 Nbd7 12.d4 h6) 8.Nf3 Bd6 9.cd5 ed5 10.Na4 0-0 11.Be2 Nbd7 12.0-0 Ne4; 7.Na4 d6 (7...Be7 8.Nf3 d6 9.e3 Nbd7 10.Be2 0-0 11.0-0 Ne4 12.Qc2 h6 ; 7...Bd6 8.Nf3 0-0 9.g3 Be7 10.Qc2 Be4 11.d3 Bf3 12.ef3 c6; 7...h6 8.Nf3 d6 9.g3 Nbd7 10.Bg2 Be7 11.0-0 0-0 12.Qc2 Ra7; 7...d5 8.Nf3 Nbd7 9.cd5 Bd5 10.Nc3 Nc5 11.e3 Be7 12.Nd5 Qd5) 8.Nf3 Nbd7 9.Qc2 Ra7 10.Nc3 Ne5 11.Nd1 Be7 12.Ne5 de5; 7.h4 d6 (7...Be7 8.Nf3 d6 9.Na4 0-0 10.h5 h6 11.e3 Nbd7 12.Be2 Ra5; 7...Bd6 8.Nf3 0-0 9.e3 Ng4 10.Na4 f5 11.Be2 Qe7 12.Qc2 Be4; 7...d5 8.Nf3 dc4 9.e3 Bd6 10.Bc4 Nbd7 11.Qc2 0-0 12.Na4 c5; 7...g6 8.Nf3 Bg7 9.e3 0-0 10.d4 d6 11.Be2 Nbd7 12.0-0 e5) 8.Nf3 Nbd7 9.Na4 Be7 10.h5 h6 11.e3 0-0 12.Be2 Ra5) 7...d5 (7...d6 8.e3 Nbd7 9.d4 g6 10.Bd3 e5 11.e4 Bg7 12.0-0 ed4; 7...Be7 8.g3 0-0 9.Bg2 d5 10.cd5 Nd5 11.0-0 Nc3 12.Bc3 Nd7; 7...g6 8.g3 Bg7 9.Bg2 0-0 10.Na4 d6 11.Qc2 Nbd7 12.0-0 Ra7; 7...Bd6 8.g3 g5 9.h3 h5 10.Bg2 Ra7 11.Na4 Rg8 12.d3 Be7) 8.cd5 ed5 9.e3 (9.Na4 Bd6 10.g3 Nbd7 11.Bh3 0-0 12.0-0 Re8) 9...Bd6 (9...Nbd7 10.Na4 Bd6 11.Be2 0-0 12.0-0 Ne4) 10.Bd3 (10.Be2 Nbd7 11.0-0 0-0 12.Na4 Ne4) 10...0-0 (10...Nbd7 11.Na4 0-0 12.0-0 Ne4) 11.0-0 (11.Na4 Ne4 12.0-0 Nd7) 11...Nbd7 12.Na4 Ne4 13.Bc2 Re8 14.Nd4 Bh2?? (better is 14...Be5+/–) 15.Kh2+– Qh4 16.Kg1 Re5 (16...Ne5+–) 17.Nf3 Qe7 18.Ne5 Ne5 19.Bd4 Ng6 20.Nc3 Nd6 (20...Ra3 21.Ra3 Qa3 22.Qa1+–) 21.Qh5 1–0. josh – maffy, internet, 2011.

6.Nc3 d5 A) 7.cd5 ed5 (7...Bd6 8.de6 Be6 9.g3 0-0 10.Bg2 Nbd7 11.Nf3 Nc5 12.Nd4 Nb3; 7...Be7 8.de6 Be6 9.Na4 Qd6 10.Nf3 Nbd7 11.e3 0-0 12.Be2 c5) 8.Nf3 Bd6 9.g3 Nbd7 10.Na4 Bb7 11.Bh3 0-0 12.0-0 Re8; B) 7.g3 dc4 (7...Bb7 8.cd5 ed5 9.Bg2 Bd6 10.Nf3 0-0 11.0-0 Nbd7 12.Na4 Re8; 7...Nbd7 8.cd5 ed5 9.Nf3 Bd6 10.Na4 Bb7 11.Bh3 0-0 12.0-0 Re8; 7...Bd6 8.cd5 Bb7 9.Nf3 ed5 10.Bg2 Nbd7 11.0-0 Nc5 12.d4 Nce4; 7...Be7 8.Bg2 0-0 9.Qc2 Bb7 10.cd5 ed5 11.Nh3 c5 12.Nf4 Qd6) 8.Bg2 Ra5 9.Nf3 Bd6 10.0-0 0-0 11.Qc2 Bb7 12.Na4 Nbd7; C) 7.Qc2 Bb7 (7...Nbd7 8.cd5 Nc5 9.de6 Be6 10.Nf3 g6 11.d4 Bf5 12.Qd1 Nb3; 7...Bd6 8.cd5 ed5 9.g3 Bb7 10.Bg2 0-0 11.d4 Nbd7 12.Nf3 Qe7; 7...dc4 8.Nf3 Nbd7 9.e3 Bb7 10.Bc4 Bd6 11.0-0 0-0 12.d4 Bf3; 7...Be7 8.Nf3 0-0 9.cd5 ed5 10.Na4 Nbd7 11.e3 Ne4 12.Be2 Bf6) 8.Nf3 Bd6 9.cd5 ed5 10.e3 0-0 11.Be2 Qe8 12.0-0 Nbd7; D) 7.h4 Bd6 (7...Nbd7 8.Nf3 Bd6 9.cd5 ed5 10.g3 0-0 11.Bg2 Nc5 12.0-0 Bb7; 7...dc4 8.e3 Bd6 9.Bc4 Nbd7 10.Nf3 0-0 11.h5 h6 12.Na4 Bb7; 7...Be7 8.Nf3 0-0 9.Qc2 Nbd7 10.Na4 Bb7 11.cd5 ed5 12.e3 Bd6 ; 7...Bb7 8.cd5 ed5 9.Nf3 Bd6 10.Na4 0-0 11.e3 Nbd7 12.Be2 h6) 8.Nf3 0-0 9.g3 Nbd7 10.Bg2 Nc5 11.cd5 ed5 12.0-0 Bb7; E) 7.Nf3 Nbd7 (7...Be7 8.g3 Nbd7 9.cd5 ed5 10.Na4 Bb7 11.Bh3 0-0 12.0-0 Bd6; 7...dc4 8.Qc2 Nbd7 9.e3 Bd6 10.Bc4 Bb7 11.d4 0-0 12.h3 g6; 7...Bb7 8.cd5 ed5 9.Na4 Bd6 10.g3 Nbd7 11.Bh3 0-0 12.0-0 Re8; 7...Bd6 8.cd5 ed5 9.g3 Nbd7 10.Bg2 Nc5 11.Nd4 Bb7 12.0-0 Qd7) 8.cd5 ed5 9.g3 Bd6 10.Na4 Bb7 11.Bh3 0-0 12.0-0 Re8.

6.Nc3 d6 A) 7.Nf3 Nbd7 (7...Bb7 8.e3 Nbd7 9.d4 g6 10.Qc2 Bg7 11.Be2 0-0 12.0-0 e5; 7...Be7 8.d4 0-0 9.e3 Bb7 10.Bd3 Nbd7 11.Qc2 e5 12.0-0 g6; 7...g6 8.g3 Nbd7 9.Bg2 Bb7 10.Qc2 Bh6 11.Na4 0-0 12.0-0 Ra5) 8.d4 Bb7 9.e3 g6 10.Bd3 e5 11.e4 Bg7 12.0-0 0-0; B) 7.e3 Nbd7 (7...Bb7 8.Na4 Nbd7 9.Nf3 g6 10.Be2 Bg7 11.0-0 0-0 12.d3 Qe7; 7...h6 8.Nf3 Nbd7 9.d4 Be7 10.Bd3 Bb7 11.0-0 0-0 12.Qc2 e5; 7...Be7 8.Nf3 0-0 9.d4 Bb7 10.Bd3 Nbd7 11.0-0 e5 12.Qc2 g6; 7...h5 8.Nf3 Nbd7 9.Na4 Bb7 10.Be2 Be7 11.0-0 0-0 12.Nd4 Nc5) 8.d4 Bb7 9.Nf3 g6 10.Na4 Bg7 11.Bd3 0-0 12.0-0 e5; C) 7.Na4 Nbd7 (7...Bb7 8.Nf3 Nbd7 9.e3 g6 10.Be2 Bg7 11.0-0 0-0 12.d3 Qe7; 7...Be7 8.Nf3 Bb7 9.g3 Nbd7 10.Bg2 Ne5 11.Qc2 Ra7 12.0-0 Qa8; 7...h6 8.Nf3 Bb7 9.g3 Nbd7 10.Bg2 Ne5 11.d3 Nf3 12.Bf3 Bf3; 7...h5 8.Nf3 Nbd7 9.e3 Be7 10.Be2 Bb7 11.0-0 0-0 12.Nd4 Nc5) 8.Nf3 Bb7 9.e3 g6 10.Be2 Bg7 11.Qc2 0-0 12.0-0 e5; D) 7.d4 Bb7 (7...Nbd7 8.e4 Be7 9.Bd3 e5 10.Nf3 ed4 11.Nd4 Bb7 12.0-0 0-0; 7...g6 8.g3 Bb7 9.Nf3 Nbd7 10.Bg2 Bh6 11.0-0 0-0 12.Qc2 Qe7; 7...Be7 8.Nf3 Nbd7 9.e4 e5 10.Bd3 ed4 11.Nd4 0-0 12.0-0 Bb7; 7...h6 8.e4 Be7 9.Nf3 0-0 10.Bd3 Nbd7 11.0-0 Bb7 12.Re1 e5) 8.Nf3 g6 9.g3 Nbd7 10.Bg2 Bh6 11.0-0 0-0 12.Qc2 Qe7; E) 7.Qc2 Nbd7 (7...Bb7 8.Nf3 Nbd7 9.d4 g6 10.e4 Bg7 11.Bd3 0-0 12.0-0 e5; 7...h6 8.Nf3 Bb7 9.d4 Be7 10.e4 0-0 11.Bd3 Nbd7 12.0-0 e5; 7...Be7 8.Nf3 Nbd7 9.d4 0-0 10.e3 Bb7 11.Bd3 e5 12.0-0 g6; 7...g6 8.Nf3 Nbd7 9.g3 Bb7 10.Bg2 Bh6 11.0-0 0-0 12.Na4 Ra5) 8.Na4 Bb7 9.Nf3 Ra7 10.Nc3 Ne5 11.Qb3 Be7 12.d4 Nf3.

6.Nc3 Bd6 A) 7.Nf3 Bb7 (7...0-0 8.g3 Bb7 9.Bg2 Ng4 10.0-0 f5 11.Na4 f4 12.Qc2 Rf5; 7...Qe7 8.e4 e5 9.Bd3 Bb7 10.0-0 0-0 11.Qc2 h6 12.Rfe1 Nh5; 7...h6 8.g3 Bb7 9.Bg2 0-0 10.0-0 e5 11.Na4 Qe7 12.Qc2 Be4; 7...e5 8.g3 Bb7 9.Bg2 0-0 10.0-0 h6 11.Na4 Qe7 12.Qc2 Be4) 8.g3 g5 9.h3 Ra5 10.Na4 h5 11.Bg2 h4 12.g4 Rg8; B) 7.e3 h6 (7...Bb7 8.Nf3 0-0 9.Bd3 Qe7 10.0-0 Ng4 11.h3 Nh2 12.Nh2 Bh2; 7...0-0 8.Nf3 Bb7 9.Bd3 Qe7 10.Qc2 e5 11.Ng5 g6 12.0-0 c6; 7...Qe7 8.Nf3 Bb7 9.Bd3 e5 10.e4 0-0 11.0-0 Qe6 12.Qc2 h6; 7...Ra5 8.Nf3 0-0 9.Bd3 Bb7 10.Qc2 Qe7 11.0-0 e5 12.e4 g6) 8.Nf3 Bb7 9.Bd3 0-0 10.Qc2 Be7 11.Be2 d6 12.0-0 Nbd7; C) 7.Qc2 Qe7 (7...Bb7 8.Nf3 0-0 9.e3 Be7 10.Be2 d6 11.0-0 Nbd7 12.d4 h6; 7...0-0 8.Nf3 Bb7 9.e3 Be7 10.Be2 d6 11.0-0 Nbd7 12.d4 h6; 7...h6 8.Na4 0-0 9.c5 bc5 10.Nc5 c6 11.Nf3 cb5 12.e3 Qb6; 7...Ra7 8.Nf3 Bb7 9.e3 0-0 10.Be2 Qe7 11.h3 e5 12.Na4 Re8) 8.Nf3 Bb7 9.e3 0-0 10.Bd3 e5 11.Ng5 g6 12.0-0 c6; D) 7.Na4 Bb7 (7...0-0 8.Nf3 Bb7 9.g3 c6 10.Bd4 cb5 11.cb5 Bc7 12.Rc1 e5; 7...Qe7 8.Nf3 Bb7 9.g3 g5 10.h3 h5 11.Bg2 Rh6 12.d3 Qf8 ; 7...h6 8.Nf3 Bb7 9.g3 c6 10.Bg2 cb5 11.cb5 Ra5 12.0-0 0-0; 7...Ra5 8.Nf3 Bb7 9.g3 h5 10.Bg2 h4 11.Nh4 Rh4 12.Bb7 Rc4) 8.Nf3 h6 9.g3 g5 10.Bg2 Rg8 11.0-0 g4 12.Nh4 Bg2; E) 7.g3 Bb7 (7...0-0 8.Bg2 Ra7 9.Nf3 Bb7 10.Na4 h6 11.0-0 Qe7 12.d4 Ne4; 7...Ng4 8.Bg2 Ra7 9.Na4 0-0 10.Nf3 Bb7 11.0-0 f5 12.h3 Nf6; 7...Ra7 8.Bg2 0-0 9.Nf3 Bb7 10.0-0 Ne4 11.Na4 Qe7 12.Qc2 e5) 8.Nf3 g5 9.h3 h5 10.Bg2 Ra7 11.Na4 Rf8 12.Qc2 Qe7.

6.Nc3 Be7 A) 7.e3 0-0 (7...d5 8.cd5 ed5 9.Nf3 Nbd7 10.d4 0-0 11.Bd3 Bb7 12.Qc2 h6; 7...Bb7 8.Nf3 0-0 9.Qc2 d5 10.cd5 Nd5 11.Bd3 f5 12.0-0 Nd7; 7...d6 8.d4 0-0 9.Nf3 Bb7 10.Bd3 Nbd7 11.0-0 e5 12.Qc2 g6; 7...h5 8.Nf3 d6 9.Be2 Nbd7 10.0-0 Bb7 11.d4 Ne4 12.Ne4 Be4) 8.Nf3 d5 9.cd5 ed5 10.d4 Bf5 11.Nh4 Bg4 12.Be2 Be2; B) 7.g3 d5 (7...Bb7 8.Nf3 0-0 9.Bg2 d5 10.cd5 Nd5 11.0-0 Nc3 12.Bc3 Nd7; 7...0-0 8.Bg2 d5 9.cd5 Nd5 10.Nd5 ed5 11.Nf3 c5 12.bc6 Nc6; 7...Ra7 8.Bg2 d6 9.Nf3 Bb7 10.0-0 Nbd7 11.Na4 Qa8 12.Nc3 Ne5 ; 7...d6 8.Bg2 Ra5 9.Qc2 Nbd7 10.Na4 0-0 11.Nh3 d5 12.0-0 Bb7) 8.Bg2 0-0 9.cd5 ed5 10.Nf3 c5 11.bc6 Nc6 12.Rc1 Na5; C) 7.Qc2 d5 (7...0-0 8.g3 Bb7 9.Nf3 d5 10.cd5 Nd5 11.Bg2 Nd7 12.0-0 Nc5; 7...Bb7 8.Nf3 0-0 9.e3 h6 10.Be2 d6 11.0-0 Nbd7 12.d4 Qb8; 7...d6 8.Nf3 Nbd7 9.d4 0-0 10.e3 Bb7 11.Bd3 e5 12.0-0 Re8; 7...h6 8.Nf3 Bb7 9.g3 d6 10.Bg2 Nbd7 11.0-0 0-0 12.Na4 Ra7) 8.Nf3 0-0 9.cd5 ed5 10.e3 Nbd7 11.d4 Bd6 12.Bd3 Bb7; D) 7.Na4 0-0 (7...Bb7 8.e3 0-0 9.Nf3 d6 10.Be2 Nbd7 11.0-0 Ne4 12.Qc2 h6; 7...d5 8.Nf3 0-0 9.e3 Bb7 10.Qc2 Nbd7 11.cd5 Bd5 12.Be2 Bd6; 7...d6 8.Nf3 Nbd7 9.g3 Bb7 10.Bg2 Ra7 11.d4 0-0 12.0-0 Ne4; 7...g6 8.Nf3 0-0 9.g3 Bb7 10.Bg2 d5 11.Qc2 dc4 12.Qc4 Nbd7) 8.Nf3 Bb7 9.e3 d6 10.Be2 Nbd7 11.0-0 Ne4 12.Qc2 h6; E) 7.Nf3 0-0 (7...d5 8.cd5 ed5 9.g3 Nbd7 10.Bg2 0-0 11.Na4 Bd6 12.0-0 Bb7; 7...Bb7 8.e3 0-0 9.Qc2 h6 10.Be2 d6 11.0-0 Nbd7 12.d4 Qb8; 7...d6 8.d4 Nbd7 9.e4 0-0 10.Bd3 e5 11.0-0 Bb7 12.Nd5 ed4; 7...h5 8.g3 Bb7 9.Bg2 g5 10.0-0 g4 11.Nh4 Qc8 12.e4 d6) 8.g3 d5 9.cd5 Nd5 10.Qc2 Bf6 11.Bg2 Nd7 12.0-0 Nc5.

6.e3 Bb7 A) 7.Nf3 d5 (7...d6 8.Nc3 g6 9.d4 Nbd7 10.Qc2 Bg7 11.Be2 0-0 12.0-0 e5; 7...g6 8.d4 d5 9.cd5 ed5 10.Nc3 Nbd7 11.Ne5 Qe7 12.f4 Bg7; 7...Be7 8.Nc3 0-0 9.Qc2 d5 10.Na4 Nbd7 11.cd5 Nd5 12.Be2 Bf6; 7...Bd6 8.Nc3 0-0 9.Be2 e5 10.0-0 e4 11.Nd4 g6 12.f4 Re8) 8.Nc3 Nbd7 9.cd5 ed5 10.Na4 Bd6 11.Be2 0-0 12.0-0 Ne4; B) 7.Qc2 d6 (7...g6 8.Nc3 d6 9.Nf3 Nbd7 10.d4 Bg7 11.Be2 0-0 12.0-0 e5; 7...d5 8.Nf3 Bd6 9.Nc3 Nbd7 10.cd5 ed5 11.Be2 0-0 12.Na4 Qe7; 7...Be4 8.d3 Bb7 9.Nc3 d5 10.cd5 ed5 11.Nf3 Bd6 12.Be2 0-0; 7...Ne4 8.Nc3 Nc5 9.Nf3 Bd6 10.Be2 0-0 11.0-0 Qf6 12.d4 Nb3) 8.Nc3 Nbd7 9.d4 g6 10.Nf3 Bg7 11.Be2 0-0 12.0-0 e5; C) 7.h3 Be7 (7...d6 8.Nc3 Nbd7 9.Na4 g6 10.Nf3 Bg7 11.Be2 0-0 12.Qc2 Ne4; 7...d5 8.Nf3 Nbd7 9.cd5 ed5 10.Nc3 Bd6 11.Na4 0-0 12.Be2 c5; 7...g6 8.Nf3 Bg7 9.Nc3 0-0 10.Be2 d6 11.d4 Nbd7 12.Qc2 e5; 7...Bd6 8.Nc3 0-0 9.Qc2 e5 10.Nf3 e4 11.Nd4 Be5 12.Na4 c5) 8.Nf3 d6 9.Nc3 Nbd7 10.Na4 0-0 11.Be2 Ne4 12.0-0 Bf6 ; D) 7.h4 d6 (7...Be7 8.Nc3 d6 9.Na4 Nbd7 10.h5 h6 11.Nf3 0-0 12.Be2 Ra5; 7...d5 8.Nc3 Nbd7 9.Nf3 Bd6 10.cd5 ed5 11.Na4 0-0 12.Be2 h6; 7...g6 8.Nc3 d6 9.Nf3 Nbd7 10.d4 Bg7 11.Be2 0-0 12.Qc2 Qe7; 7...Bd6 8.Nc3 0-0 9.Nf3 e5 10.Be2 g6 11.Qc2 e4 12.Nd4 c5) 8.Nf3 Nbd7 9.Nc3 Be7 10.Be2 Ng4 11.Na4 0-0 12.Qc2 h6 ; E) 7.Nc3 d6 (7...d5 8.Nf3 Nbd7 9.cd5 ed5 10.Na4 Bd6 11.Be2 0-0 12.0-0 Re8; 7...Bd6 8.Nf3 0-0 9.Be2 Ne4 10.Ne4 Be4 11.d3 Bb7 12.0-0 Ra7; 7...g6 8.Nf3 d6 9.d4 Nbd7 10.Qc2 Bg7 11.Be2 0-0 12.0-0 e5; 7...Be7 8.Nf3 0-0 9.Qc2 d6 10.d4 Nbd7 11.Bd3 e5 12.0-0 g6) 8.Nf3 Nbd7 9.d4 g6 10.Be2 Bg7 11.0-0 0-0 12.Qc2 e5.

6.e3 Bc5 A) 7.Nf3 d5 (7...Bb7 8.Nc3 0-0 9.d4 Be7 10.Bd3 d6 11.0-0 Nbd7 12.Qc2 e5; 7...0-0 8.d4 Be7 9.Nc3 Bb7 10.Bd3 d6 11.0-0 Nbd7 12.Qc2 e5; 7...Ne4 8.Bg7 Rg8 9.Bb2 Bb7 10.Nc3 Nc3 11.Bc3 Qe7 12.Qc2 f6; 7...Be7 8.Nc3 Bb7 9.d4 0-0 10.Bd3 d6 11.0-0 Nbd7 12.Qc2 e5) 8.Nc3 0-0 9.cd5 ed5 10.Na4 Nbd7 11.Be2 Bd6 12.0-0 Bb7; B) 7.d4 Bd6 (7...Be7 8.Nc3 0-0 9.Nf3 Bb7 10.Bd3 d6 11.0-0 Nbd7 12.Qc2 e5; 7...Bf8 8.Nf3 Bb7 9.Nc3 Be7 10.Bd3 0-0 11.0-0 d5 12.cd5 ed5) 8.Nf3 Ne4 9.Nc3 Nc3 10.Bc3 Bb7 11.Bd3 f5 12.0-0 0-0; C) 7.Qc2 0-0 (7...d5 8.Nf3 0-0 9.Nc3 Bd6 10.Be2 dc4 11.Bc4 Nbd7 12.0-0 Bb7; 7...Bb7 8.Nc3 0-0 9.Nf3 d5 10.Na4 Nbd7 11.cd5 Bd5 12.Be2 h6; 7...Be7 8.Nc3 0-0 9.Nf3 Bb7 10.Be2 d6 11.0-0 Nbd7 12.d4 h6; 7...c6 8.Nc3 cb5 9.Nb5 Nc6 10.Nf3 Ba6 11.d4 Be7 12.Bd3 0-0) 8.Nf3 d5 9.Nc3 Nbd7 10.Na4 Bb7 11.cd5 Bd5 12.Be2 Bd6; D) 7.Bd3 d6 (7...0-0 8.Nc3 d5 9.Nf3 Nbd7 10.0-0 Bd6 11.Na4 e5 12.Be2 e4; 7...Bb7 8.Nf3 d5 9.Nc3 dc4 10.Bc4 Nbd7 11.d4 Bd6 12.0-0 0-0; 7...d5 8.Nf3 0-0 9.Qc2 Nbd7 10.cd5 ed5 11.0-0 Be7 12.Nc3 Nc5; 7...Qe7 8.Nc3 d6 9.Nf3 Bb7 10.0-0 e5 11.Be2 e4 12.Nh4 0-0) 8.Nc3 Nbd7 9.Be2 d5 10.cd5 ed5 11.Nf3 0-0 12.0-0 Bd6; E) 7.Nc3 0-0 (7...d5 8.cd5 ed5 9.Nf3 0-0 10.d4 Bd6 11.Bd3 Nbd7 12.0-0 Bb7; 7...Bb7 8.Nf3 0-0 9.d4 Be7 10.Bd3 d6 11.0-0 Nbd7 12.Qc2 e5; 7...Qe7 8.Nf3 d5 9.cd5 ed5 10.Qc2 Nbd7 11.Be2 0-0 12.0-0 Bd6; 7...Bd6 8.Nf3 Bb7 9.Bd3 0-0 10.0-0 g6 11.Qc2 Be7 12.Na4 d6) 8.d4 Be7 9.Nf3 Bb7 10.Bd3 d6 11.0-0 Nbd7 12.Qc2 e5.

6.e3 d5 A) 7.cd5 ed5 (7...Nd5 8.Nc3 Bb7 9.Nf3 Nc3 10.Bc3 Nd7 11.Qc2 Nc5 12.Be2 Be4; 7...Be7 8.de6 Be6 9.Nc3 Nbd7 10.Na4 0-0 11.Nf3 Ne4 12.Qc2 Bd5; 7...Bd6 8.Bf6 Qf6 9.Nc3 0-0 10.Nf3 Nd7 11.Bc4 Bb7 12.0-0 ed5) 8.Nc3 Nbd7 9.Na4 Bd6 10.Nf3 Bb7 11.Be2 0-0 12.0-0 Qe7; B) 7.Bf6 Qf6 8.Nc3 Bb7 9.cd5 ed5 10.Nge2 Bd6 11.Nd4 0-0 12.Qg4 Rd8; C) 7.Nc3 Bd6 (7...Nbd7 8.cd5 ed5 9.Nf3 Bb7 10.Na4 Bd6 11.Be2 0-0 12.0-0 Ne4; 7...Bb7 8.Nf3 Bd6 9.cd5 ed5 10.Be2 0-0 11.Na4 Re8 12.0-0 Nbd7; 7...Be7 8.cd5 ed5 9.Na4 Nbd7 10.Be2 Ne4 11.Nf3 0-0 12.0-0 Re8; 7...dc4 8.Bc4 Bb7 9.Nf3 Nbd7 10.Na4 Bd6 11.Nd4 h5 12.f4 Bg2) 8.cd5 ed5 9.Na4 Nbd7 10.Nf3 0-0 11.Be2 Ne4 12.0-0 Re8; D) 7.Qc2 Nbd7 (7...Bd6 8.Nc3 0-0 9.Nf3 Nbd7 10.Na4 Bb7 11.cd5 ed5 12.Be2 Qe7; 7...Be7 8.Nf3 Nbd7 9.d4 Bb7 10.Nc3 0-0 11.cd5 Nd5 12.Bd3 f5; 7...Bb7 8.Nc3 Nbd7 9.Nf3 Bd6 10.Na4 Qe7 11.cd5 ed5 12.d3 Ra5) 8.Nc3 Nc5 9.Nf3 Bd6 10.cd5 ed5 11.d4 Nb3 12.Rb1 0-0; E) 7.Nf3 Nbd7 (7...Bd6 8.Nc3 0-0 9.cd5 ed5 10.Na4 Bg4 11.h3 Bf3 12.gf3 Nbd7; 7...Bb7 8.Nc3 Nbd7 9.cd5 ed5 10.Be2 Bd6 11.0-0 0-0 12.Na4 Qe7; 7...Be7 8.Nc3 0-0 9.cd5 ed5 10.Na4 Nbd7 11.Be2 Bb7 12.0-0 Ne4; 7...dc4 8.Bc4 Nbd7 9.Nc3 Bd6 10.0-0 0-0 11.Qc2 Bb7 12.d4 Bf3) 8.Nc3 Bd6 9.cd5 ed5 10.Na4 0-0 11.Be2 Bb7 12.0-0 Qe7.

6.e3 d6 A) 7.Nc3 Nbd7 (7...Bb7 8.Nf3 Nbd7 9.d4 g6 10.Bd3 Bg7 11.0-0 0-0 12.Re1 Qe7; 7...e5 8.Be2 Nbd7 9.Qc2 Nc5 10.Bf3 Ra5 11.Nge2 Be6 12.d4 e4; 7...Be7 8.Nf3 Bb7 9.d4 Nbd7 10.Bd3 0-0 11.0-0 e5 12.Qc2 g6; 7...h6 8.Nf3 Nbd7 9.d4 Bb7 10.Qc2 Be7 11.Bd3 0-0 12.0-0 e5) 8.Na4 Bb7 9.Nf3 g6 10.Nd4 Bg7 11.Nc6 Bc6 12.bc6 Ne5; B) 7.Nf3 Nbd7 (7...Bb7 8.Nc3 Nbd7 9.Be2 Be7 10.0-0 Nc5 11.Qc2 0-0 12.d4 Nb3; 7...g6 8.Nc3 Bb7 9.Be2 Nbd7 10.0-0 Bg7 11.Na4 0-0 12.d3 e5; 7...Be7 8.Nc3 0-0 9.d4 Nbd7 10.Bd3 Bb7 11.0-0 e5 12.Qc2 g6; 7...h6 8.Nc3 Nbd7 9.d4 Bb7 10.Bd3 e5 11.Qc2 Be7 12.0-0 0-0) 8.Nc3 Bb7 9.Be2 Be7 10.d4 Ne4 11.Ne4 Be4 12.0-0 0-0; C) 7.d4 Bb7 (7...g6 8.Nc3 Nbd7 9.Bd3 Bb7 10.Nf3 e5 11.Bc2 Bg7 12.0-0 0-0; 7...Nbd7 8.Nc3 g6 9.Bd3 Bb7 10.Nf3 e5 11.e4 Bg7 12.0-0 0-0; 7...Qe7 8.Be2 Ne4 9.Nc3 Nc3 10.Bc3 Nd7 11.Bf3 Ra7 12.Ne2 g6; 7...d5 8.cd5 Nd5 9.Nf3 Bb7 10.Bc4 Nd7 11.0-0 Bd6 12.e4 Nf4) 8.Nf3 g6 9.c5 dc5 10.dc5 Qd1 11.Kd1 Bf3 12.gf3 Bg7; D) 7.Qc2 Be7 (7...Nbd7 8.d4 g6 9.Nc3 Bb7 10.Nf3 Bg7 11.Be2 0-0 12.0-0 e5; 7...Bb7 8.Nc3 Nbd7 9.d4 Qe7 10.Nf3 g6 11.Bd3 e5 12.e4 ed4; 7...g6 8.Nc3 Nbd7 9.Nf3 Bb7 10.Be2 Bg7 11.0-0 0-0 12.d4 e5; 7...e5 8.Be2 Bb7 9.Nf3 g6 10.Nc3 Nbd7 11.0-0 Bg7 12.Na4 0-0) 8.Nc3 Nbd7 9.d4 e5 10.Nf3 0-0 11.Bd3 Bb7 12.0-0 g6; E) 7.Be2 Nbd7 (7...Be7 8.Nc3 Nbd7 9.Na4 0-0 10.Nf3 Bb7 11.0-0 h6 12.Nd4 Ne4; 7...Bb7 8.Nf3 Nbd7 9.Nc3 Be7 10.Na4 0-0 11.0-0 Ne4 12.Qc2 h6) 8.Nf3 Bb7 9.Nc3 Be7 10.0-0 0-0 11.Na4 Ne4 12.Qc2 h6.

6.e3 Be7 A) 7.Nf3 Bb7 (7...0-0 8.Nc3 Bb7 9.Qc2 h6 10.Be2 d6 11.0-0 Nbd7 12.d4 e5; 7...d5 8.Nc3 0-0 9.cd5 ed5 10.Na4 Ne4 11.d3 Nd6 12.Qb3 Nb5; 7...d6 8.d4 0-0 9.Nc3 Bb7 10.Bd3 Nbd7 11.0-0 e5 12.Qc2 g6; 7...h6 8.Nc3 Bb7 9.d4 0-0 10.Bd3 d5 11.cd5 ed5 12.0-0 Qd6) 8.Nc3 0-0 9.Qc2 d6 10.Be2 Nbd7 11.d4 Ra7 12.0-0 Qa8 ; B) 7.Be2 d5 (7...Bb7 8.Nf3 d6 9.Nc3 Nbd7 10.Na4 0-0 11.Qc2 Ne4 12.0-0 h6; 7...0-0 8.Nf3 d5 9.Nc3 Nbd7 10.Na4 Bb7 11.cd5 Nd5 12.Qc2 Bf6; 7...d6 8.Nc3 Nbd7 9.Na4 0-0 10.Nf3 Ne4 11.Qc2 Bb7 12.0-0 h6; 7...h6 8.Nc3 Bb7 9.Bf3 d5 10.cd5 ed5 11.Nge2 Nbd7 12.Nf4 Nc5) 8.cd5 0-0 9.Nc3 Nd5 10.Qc2 Nd7 11.Nd5 ed5 12.Nf3 Nc5; C) 7.Bd3 d6 (7...d5 8.Nc3 Qd6 9.Nf3 dc4 10.Bc4 Nbd7 11.0-0 Bb7 12.d4 0-0; 7...0-0 8.Nc3 Bb7 9.Nf3 d6 10.0-0 Nbd7 11.Bc2 Ne5 12.Ne5 de5; 7...Bb7 8.Nf3 0-0 9.Nc3 d6 10.Na4 Nbd7 11.0-0 Ne5 12.Ne5 de5) 8.Nc3 Nbd7 9.Nf3 Nc5 10.Bc2 0-0 11.0-0 Bb7 12.Na4 Na4; D) 7.Qc2 0-0 (7...d5 8.Nc3 Nbd7 9.Na4 0-0 10.Nf3 Bb7 11.cd5 Bd5 12.Nc3 Bb7; 7...d6 8.Nc3 Bb7 9.Nf3 0-0 10.d4 Nbd7 11.Bd3 g6 12.0-0 e5; 7...Bb7 8.Nc3 0-0 9.Nf3 h6 10.Be2 d6 11.0-0 Nbd7 12.d4 Qb8; 7...h6 8.Nc3 0-0 9.Nf3 Bb7 10.Be2 d6 11.0-0 Nbd7 12.d4 Re8) 8.Nc3 d5 9.cd5 ed5 10.Nf3 Nbd7 11.Na4 Ne4 12.Be2 Bf6 ; E) 7.Nc3 Bb7 (7...0-0 8.Nf3 d5 9.cd5 ed5 10.d4 Bb7 11.Bd3 Nbd7 12.Qc2 Re8; 7...d5 8.cd5 ed5 9.Nf3 0-0 10.Na4 Nbd7 11.Be2 Ne4 12.0-0 Bb7; 7...d6 8.Nf3 Bb7 9.d4 Nbd7 10.Bd3 0-0 11.0-0 e5 12.Qc2 g6; 7...e5 8.Be2 0-0 9.Nf3 d6 10.Qc2 Bb7 11.0-0 Nbd7 12.d4 h6) 8.Nf3 0-0 9.Qc2 d5 10.cd5 ed5 11.Be2 Nbd7 12.Na4 Bd6.

6.Nf3 Bb7 A) 7.e3 d5 (7...d6 8.Nc3 Nbd7 9.d4 g6 10.Bd3 Bg7 11.0-0 0-0 12.Re1 e5; 7...Bd6 8.Nc3 0-0 9.Bd3 Qe7 10.0-0 Ng4 11.h3 Nh2 12.Nh2 Bh2; 7...Be7 8.Nc3 0-0 9.Qc2 h6 10.Be2 d6 11.0-0 Nbd7 12.d4 e5; 7...g6 8.Nc3 Bg7 9.Be2 0-0 10.0-0 d6 11.d3 Nbd7 12.Na4 e5) 8.Nc3 Nbd7 9.Na4 Bd6 10.cd5 ed5 11.Be2 0-0 12.0-0 Ne4; B) 7.Qc2 d5 (7...d6 8.Nc3 Nbd7 9.d4 Qe7 10.Rd1 g6 11.g3 Bg7 12.Bg2 0-0; 7...Be7 8.Nc3 0-0 9.e3 d5 10.cd5 ed5 11.Be2 Nbd7 12.Na4 Bd6; 7...g6 8.Nc3 Bg7 9.g3 0-0 10.Bg2 d5 11.cd5 Nd5 12.Na4 Bb2; 7...Bd6 8.Nc3 0-0 9.g3 Be7 10.Bg2 d6 11.0-0 Nbd7 12.Na4 Ra7) 8.Nc3 Bd6 9.cd5 ed5 10.e3 0-0 11.Be2 Nbd7 12.Na4 Qe7; C) 7.g3 d5 (7...g5 8.h3 h5 9.Bg2 h4 10.g4 d6 11.Nc3 Nbd7 12.Rg1 Rg8; 7...h5 8.Bg2 Ra7 9.Nc3 Bd6 10.d3 0-0 11.0-0 Ng4 12.h3 Nf6) 8.e3 Nbd7 9.cd5 ed5 10.Bg2 Bd6 11.Nc3 Nc5 12.d4 Nce4; D) 7.h3 d6 (7...Be7 8.Nc3 0-0 9.e3 d6 10.Na4 Nbd7 11.Be2 e5 12.0-0 Ne4; 7...d5 8.cd5 ed5 9.g4 Nbd7 10.Rg1 h6 11.Nc3 Nc5 12.d4 Nce4; 7...g6 8.e3 Bg7 9.Nc3 0-0 10.d4 d6 11.Be2 Nbd7 12.Qc2 e5; 7...Bd6 8.Nc3 0-0 9.Qc2 e5 10.e3 e4 11.Nd4 Be5 12.Na4 c5) 8.Nc3 Nbd7 9.e3 Be7 10.Na4 0-0 11.Be2 Ne4 12.0-0 Bf6; E) 7.Nc3 d5 (7...d6 8.d4 Nbd7 9.Qc2 Qe7 10.Rd1 g6 11.e4 Bg7 12.Bd3 Nh5; 7...Be7 8.e3 0-0 9.Qc2 h6 10.Be2 d6 11.0-0 Nbd7 12.d4 e5; 7...Bd6 8.Na4 0-0 9.g3 Be7 10.Bg2 d5 11.Qc2 dc4 12.Qc4 Nbd7; 7...g6 8.g3 Bg7 9.Bg2 d6 10.0-0 Nbd7 11.Na4 0-0 12.Qc2 Ra7) 8.cd5 ed5 9.Na4 Bd6 10.g3 Nbd7 11.Bh3 0-0 12.0-0 Re8.

6.Nf3 d5 7.Nc3 (7.e3 Nbd7 (7...Bd6 8.Nc3 0-0 9.cd5 ed5 10.Na4 Re8 11.Be2 c5 12.Bf6 gf6; 7...Bb7 8.Nc3 Bd6 9.cd5 ed5 10.Be2 Nbd7 11.0-0 0-0 12.Na4 Ne4; 7...dc4 8.Bc4 Nbd7 9.0-0 Bd6 10.Nc3 Bb7 11.Qc2 0-0 12.h3 Qe7; 7...Be7 8.Nc3 0-0 9.cd5 ed5 10.d4 Bb7 11.Bd3 Ne4 12.0-0 Nd7) 8.Nc3 Bd6 9.cd5 ed5 10.Na4 0-0 11.Be2 Bb7 12.0-0 Ne4; 7.cd5 ed5 (7...Bd6 8.de6 Be6 9.Nd4 0-0 10.Nc3 Bd7 11.e3 c5 12.Nf3 Be6 ; 7...Be7 8.de6 Be6 9.d4 c5 10.Nbd2 Nbd7 11.e4 cd4 12.Nd4 Nc5; 7...Qd5 8.Nc3 Qh5 9.e3 Nbd7 10.Be2 Qh6 11.Nd4 Nc5 12.f4 Bd6) 8.g3 Nbd7 9.Nc3 Bd6 10.Na4 Bb7 11.Bh3 0-0 12.0-0 Re8; 7.Qc2 Bd6 (7...Be7 8.Nc3 0-0 9.cd5 ed5 10.Na4 Nbd7 11.e3 Bb7 12.Be2 Bd6; 7...Nbd7 8.cd5 ed5 9.Nc3 Bb7 10.Nd4 Nc5 11.e3 Bd6 12.Be2 0-0; 7...Bb7 8.e3 Nbd7 9.Nc3 Bd6 10.Na4 0-0 11.cd5 ed5 12.Be2 Qe7; 7...dc4 8.e3 Nbd7 9.Bc4 Bb7 10.Nc3 Bd6 11.d4 0-0 12.h3 Qe7) 8.Nc3 Bb7 9.cd5 ed5 10.e3 0-0 11.d4 c5 12.bc6 Nc6; 7.g3 Bb7 (7...dc4 8.e3 Nbd7 9.Bc4 Bb7 10.0-0 Bd6 11.d4 0-0 12.Nc3 h6 ; 7...Nbd7 8.cd5 ed5 9.Nc3 Bd6 10.Bg2 Nc5 11.Nd4 Bb7 12.0-0 Qd7; 7...Bd6 8.cd5 ed5 9.Nc3 Nbd7 10.Na4 Bb7 11.Bh3 0-0 12.0-0 Re8) 8.e3 Bd6 9.Nc3 0-0 10.cd5 ed5 11.Bg2 Nbd7 12.0-0 Nc5) 7...Nbd7 (7...Be7 8.cd5 ed5 9.g3 0-0 10.Bg2 Nbd7 11.Na4 Bb7 12.0-0 Bd6; 7...dc4 8.e3 Nbd7 9.Bc4 Bd6 10.0-0 Bb7 11.Qc2 0-0 12.d4 Bf3; 7...Bd6 8.cd5 ed5 9.g3 Nbd7 10.Na4 Bb7 11.Bh3 0-0 12.0-0 Re8; 7...Bb7 8.cd5 ed5 9.Na4 Bd6 10.g3 Nbd7 11.Bh3 0-0 12.0-0 Re8) 8.cd5 ed5 9.g3 Bd6 10.Na4 Bb7 11.Bh3 0-0 12.0-0 Re8.

6.Nf3 d6 A) 7.Qc2 Nbd7 (7...Bb7 8.Nc3 Nbd7 9.d4 Qe7 10.e4 g6 11.Bd3 Bg7 12.0-0 0-0; 7...Be7 8.g3 Nbd7 9.Nc3 Bb7 10.Bg2 Ne5 11.d3 Nf3 12.Bf3 Bf3; 7...h5 8.g3 Bb7 9.Bg2 Nbd7 10.Nc3 Ne5 11.Na4 Ra7 12.0-0 Qa8; 7...Rg8 8.Nc3 Bb7 9.d4 Nbd7 10.h4 Be7 11.e4 g6 12.Bd3 Ng4) 8.Nc3 Bb7 9.d4 Qe7 10.e3 g6 11.Bd3 Bg7 12.0-0 0-0; B) 7.Nc3 Bb7 (7...Nbd7 8.d4 Bb7 9.e3 g6 10.Bd3 Bg7 11.0-0 0-0 12.Re1 Qe7; 7...Be7 8.g3 Nbd7 9.Bg2 Bb7 10.0-0 0-0 11.Na4 Ra7 12.d4 Ne4; 7...g6 8.g3 Bb7 9.Bg2 Nbd7 10.0-0 Bg7 11.Na4 0-0 12.Qc2 Ra7; 7...h6 8.g3 Nbd7 9.Bg2 Bb7 10.0-0 Be7 11.Na4 0-0 12.Nc3 Nc5) 8.d4 g6 9.g3 Nbd7 10.Bg2 Bh6 11.0-0 0-0 12.Qc2 Ra7; C) 7.d4 Nbd7 (7...g6 8.Nc3 Bb7 9.g3 Nbd7 10.Bg2 Bg7 11.0-0 0-0 12.Qc2 Re8; 7...Bb7 8.Nc3 g6 9.g3 Bg7 10.Bg2 Nbd7 11.0-0 0-0 12.Qc2 Re8; 7...Be7 8.e3 Nbd7 9.Nc3 Bb7 10.Bd3 0-0 11.0-0 g6 12.Qc2 e5; 7...h6 8.Nc3 Bb7 9.e3 Nbd7 10.Bd3 Be7 11.0-0 0-0 12.Qc2 Re8) 8.Nc3 Bb7 9.Qc2 g6 10.e4 Bg7 11.Bd3 e5 12.0-0 0-0; D) 7.e3 Nbd7 (7...Bb7 8.Nc3 Nbd7 9.Na4 Be7 10.Be2 0-0 11.0-0 Ne4 12.Qc2 h6; 7...e5 8.Nc3 Nbd7 9.Be2 Be7 10.0-0 0-0 11.d4 Bb7 12.Na4 Ne4; 7...g6 8.g4 h6 9.Nc3 Bb7 10.Bg2 Ng4 11.Ne4 e5 12.Nd4 Qc8; 7...Be7 8.Nc3 Bb7 9.d4 0-0 10.Bd3 Nbd7 11.0-0 e5 12.Qc2 Re8) 8.Nc3 Bb7 9.d4 g6 10.Be2 Bg7 11.Qc2 0-0 12.0-0 e5; E) 7.g3 Bb7 (7...Nbd7 8.Bg2 Bb7 9.0-0 g6 10.Nc3 Bg7 11.Na4 0-0 12.Qc2 Ra7; 7...Be7 8.Bg2 Bb7 9.0-0 Nbd7 10.Nc3 0-0 11.Na4 Ra5 12.d4 e5; 7...h5 8.Nc3 Nbd7 9.Bg2 Bb7 10.0-0 h4 11.Nh4 Bg2 12.Ng2 Ne5; 7...g6 8.Nc3 Nbd7 9.Bg2 Bb7 10.0-0 Bg7 11.Na4 0-0 12.Qc2 Ra7) 8.Bg2 Nbd7 9.0-0 g6 10.Nc3 Bh6 11.Na4 0-0 12.Qc2 Ra5.

6.Nf3 Be7 A) 7.Nc3 d5 (7...Bb7 8.g3 0-0 9.Bg2 d5 10.cd5 Nd5 11.0-0 Nc3 12.Bc3 Nd7; 7...0-0 8.Qc2 Bb7 9.e3 h6 10.Be2 d6 11.d4 Nbd7 12.0-0 Ra5; 7...d6 8.e3 h6 9.d4 Nbd7 10.Bd3 Bb7 11.0-0 0-0 12.Qc2 Re8; 7...h5 8.g3 Bb7 9.Bg2 d6 10.0-0 Nbd7 11.Qc2 Ra7 12.d4 Qa8) 8.cd5 ed5 9.e3 0-0 10.Bd3 Nbd7 11.Na4 Ne4 12.0-0 Bd6; B) 7.g3 0-0 (7...d5 8.Nc3 dc4 9.e3 0-0 10.Bc4 Bb7 11.0-0 Qd6 12.d3 Nbd7; 7...Bb7 8.Nc3 0-0 9.Bg2 d5 10.cd5 Nd5 11.Qc2 Nd7 12.Na4 Ra5; 7...d6 8.Nc3 Nbd7 9.Bg2 Bb7 10.0-0 h6 11.Na4 0-0 12.Nc3 Nc5; 7...Ra7 8.Nc3 Bb7 9.Bg2 d6 10.0-0 Nbd7 11.Na4 Qa8 12.Nc3 0-0) 8.Nc3 d5 9.Bg2 Nbd7 10.cd5 Nd5 11.Na4 Ra5 12.Qb3 Bb7; C) 7.Qc2 d5 (7...0-0 8.Nc3 Bb7 9.e3 h6 10.Be2 d6 11.0-0 Nbd7 12.d4 e5; 7...Bb7 8.Nc3 d6 9.e3 0-0 10.d4 Nbd7 11.Bd3 Re8 12.0-0 e5; 7...d6 8.g3 Bb7 9.Bg2 Nbd7 10.Nc3 Ra7 11.0-0 0-0 12.d4 Qa8; 7...h6 8.Nc3 d6 9.g3 0-0 10.Bg2 Bb7 11.0-0 Nbd7 12.d4 Re8) 8.cd5 ed5 9.Nc3 0-0 10.e3 Nbd7 11.Na4 Ne4 12.Be2 Bf6; D) 7.h4 0-0 (7...d6 8.Nc3 Nbd7 9.g3 Nc5 10.Bg2 Bb7 11.d4 Nb3 12.Rb1 0-0; 7...Bb7 8.Nc3 d6 9.h5 h6 10.Na4 0-0 11.e3 Nbd7 12.Be2 Ra7; 7...d5 8.Qc2 Nbd7 9.Nc3 0-0 10.Na4 Bb7 11.cd5 Bd5 12.h5 h6; 7...h6 8.Nc3 Bb7 9.e3 0-0 10.Qc2 d6 11.d4 Nbd7 12.Bd3 Ng4) 8.Nc3 d6 9.g3 Nbd7 10.Bg2 Bb7 11.d4 e5 12.0-0 ed4; E) 7.e3 Bb7 (7...d5 8.Nc3 0-0 9.cd5 ed5 10.d4 Bb7 11.Bd3 Ne4 12.0-0 Nd7; 7...0-0 8.Nc3 Bb7 9.Qc2 h6 10.Be2 d6 11.0-0 Nbd7 12.d4 Ra5; 7...d6 8.Nc3 0-0 9.d4 Bb7 10.Bd3 Nbd7 11.0-0 e5 12.Qc2 Re8; 7...h6 8.Nc3 0-0 9.d4 Bb7 10.Bd3 d5 11.cd5 Nd5 12.0-0 Nc3) 8.Nc3 0-0 9.Qc2 h6 10.Be2 d6 11.0-0 Nbd7 12.d4 Ra5.

6.Nf3 g6 A) 7.g3 Bb7 (7...Bg7 8.Nc3 Bb7 9.Bg2 d6 10.0-0 Nbd7 11.Qc2 0-0 12.Na4 Ra7; 7...Bd6 8.Bg2 Bb7 9.0-0 g5 10.Nc3 g4 11.Ng5 Bg2 12.Kg2 h5; 7...d6 8.Nc3 Nbd7 9.Na4 Bb7 10.Bg2 Bg7 11.0-0 0-0 12.Qc2 Ra7; 7...Bh6 8.Nc3 Bb7 9.Bg2 d6 10.0-0 Nbd7 11.Na4 0-0 12.Qc2 Ra5) 8.Bg2 d6 9.0-0 Nbd7 10.Nc3 Bg7 11.Na4 0-0 12.Qc2 Ra7; B) 7.Qc2 Bg7 (7...Bb7 8.Nc3 d6 9.g3 Nbd7 10.Bg2 Bg7 11.0-0 0-0 12.Na4 Ra7; 7...d6 8.Nc3 Bb7 9.g3 Nbd7 10.Bg2 Bg7 11.0-0 0-0 12.Na4 Ra7; 7...Be7 8.Nc3 0-0 9.g3 Bb7 10.Bg2 d5 11.cd5 ed5 12.0-0 Nbd7; 7...Bh6 8.g4 g5 9.h4 Rg8 10.hg5 Bg5 11.Ng5 Rg5 12.Rh6 e5) 8.Nc3 0-0 9.g3 Bb7 10.Bg2 d6 11.0-0 Nbd7 12.Na4 Ra7; C) 7.e3 Bg7 (7...Bb7 8.Nc3 Bg7 9.Qc2 0-0 10.Be2 d6 11.0-0 Nbd7 12.d4 e5; 7...d6 8.Nc3 Bb7 9.Qc2 Nbd7 10.Na4 Bg7 11.Be2 0-0 12.0-0 e5; 7...Be7 8.Nc3 Bb7 9.Be2 d6 10.0-0 Nbd7 11.d4 0-0 12.Qc2 Ra7; 7...Bh6 8.Nc3 d6 9.h4 Bb7 10.Na4 Nbd7 11.Be2 Bg7 12.d4 0-0) 8.Nc3 Bb7 9.d4 0-0 10.Qc2 d6 11.Be2 Nbd7 12.0-0 e5; D) 7.e4 Bb7 (7...d6 8.Nc3 Bb7 9.Qc2 Bg7 10.d4 0-0 11.Bd3 Nbd7 12.0-0 e5; 7...Bg7 8.Bd3 Bb7 9.0-0 0-0 10.Re1 d6 11.Bc2 Nbd7 12.d4 Re8; 7...Be7 8.Nc3 Bb7 9.Be2 d6 10.Qc2 Nbd7 11.d4 0-0 12.0-0 e5) 8.e5 Nh5 9.Nc3 d6 10.ed6 Bd6 11.Ne4 0-0 12.Nd6 Qd6; E) 7.Nc3 Bg7 (7...Bb7 8.g3 Bg7 9.Bg2 d6 10.0-0 Nbd7 11.Na4 0-0 12.Qc2 Ra7; 7...d6 8.Na4 Bg7 9.g3 Bb7 10.Bg2 Nbd7 11.0-0 0-0 12.Qc2 Ra7; 7...Be7 8.e3 0-0 9.Be2 d6 10.0-0 Nbd7 11.d4 Bb7 12.Qc2 e5; 7...Qe7 8.e4 d6 9.d4 Bb7 10.e5 de5 11.de5 Nfd7 12.Be2 Nc5) 8.g3 Bb7 9.Bg2 d6 10.0-0 Nbd7 11.Na4 0-0 12.Qc2 Ra7.

6.h4 Bb7 A) 7.Nf3 Be7 (7...d6 8.Nc3 Be7 9.Na4 Nbd7 10.Qc2 0-0 11.e3 Be4 12.d3 Bb7; 7...d5 8.cd5 Bd5 9.Nc3 Bb3 10.Qb1 Nbd7 11.g3 Bc5 12.Bg2 h6; 7...h6 8.Nc3 d6 9.e3 Be7 10.Qc2 0-0 11.d4 Nbd7 12.Bd3 Ng4; 7...g6 8.Nc3 Bg7 9.Na4 d6 10.g4 0-0 11.g5 Nh5 12.Bg7 Kg7) 8.Nc3 d6 9.Na4 Nbd7 10.Qc2 0-0 11.e3 Be4 12.d3 Bb7; B) 7.e3 d6 (7...Be7 8.Nc3 d6 9.Na4 Nbd7 10.Nf3 0-0 11.Qc2 Be4 12.d3 Bb7; 7...d5 8.Nc3 Bd6 9.cd5 ed5 10.Nf3 Nbd7 11.d4 0-0 12.Bd3 h6; 7...h6 8.Nc3 Be7 9.Nf3 d6 10.Qc2 Nbd7 11.d4 0-0 12.Bd3 Ng4; 7...g6 8.Nf3 d6 9.Nc3 Nbd7 10.d4 Bg7 11.Be2 0-0 12.Qc2 Qe7) 8.Nc3 Nbd7 9.Na4 Be7 10.Nf3 0-0 11.Qc2 Be4 12.d3 Bb7; C) 7.Qc2 d5 (7...d6 8.Nc3 Nbd7 9.Nf3 Be7 10.Na4 0-0 11.e3 Be4 12.d3 Bb7; 7...Be7 8.Nc3 d6 9.Nf3 Nbd7 10.Na4 0-0 11.e3 Be4 12.d3 Bb7; 7...Ng4 8.Nf3 d6 9.Nc3 Nd7 10.Na4 Ndf6 11.Nc3 Ne5 12.e4 Nf3; 7...g6 8.h5 gh5 9.Nc3 d6 10.Nf3 Nbd7 11.Na4 Rg8 12.Rh3 Qb8) 8.Nf3 Nbd7 9.Nc3 dc4 10.Na4 Ra5 11.Qc4 Qa8 12.Nc3 Ba3; D) 7.d3 d6 (7...Be7 8.Nc3 d6 9.h5 Nbd7 10.Na4 h6 11.Nf3 0-0 12.e4 c5; 7...d5 8.cd5 Qd5 9.Nc3 Qh5 10.e3 Qd1 11.Rd1 Bd6 12.Nf3 0-0; 7...Bd6 8.Nf3 0-0 9.Nc3 Ng4 10.Na4 Qe7 11.g3 f5 12.Bg2 f4; 7...h6 8.Nf3 d6 9.Nc3 Nbd7 10.Na4 Be7 11.g3 0-0 12.Bg2 c5) 8.Nc3 Nbd7 9.Na4 Be7 10.h5 h6 11.Nf3 0-0 12.e4 c6; E) 7.Nc3 d6 (7...Be7 8.Nf3 d6 9.Na4 Nbd7 10.Qc2 0-0 11.e3 Be4 12.d3 Bb7; 7...Bd6 8.Nf3 0-0 9.Qc2 e5 10.e3 g6 11.Be2 e4 12.Nd4 c5; 7...d5 8.cd5 ed5 9.Nf3 Bd6 10.e3 Nbd7 11.d4 0-0 12.Bd3 h6; 7...g6 8.Nf3 Bg7 9.e3 0-0 10.Bd3 d6 11.h5 Nh5 12.g4 Nf6) 8.Nf3 Be7 9.Qc2 Nbd7 10.Na4 0-0 11.e3 Be4 12.d3 Bb7.

6.h4 d5 A) 7.Nc3 Bd6 (7...Nbd7 8.Nf3 Bd6 9.Na4 0-0 10.e3 dc4 11.Bc4 Bb7 12.Nc3 Ng4; 7...Be7 8.Nf3 0-0 9.e3 Nbd7 10.Na4 Bb7 11.cd5 Nd5 12.Bd3 f5; 7...dc4 8.e3 Nbd7 9.Nf3 Bd6 10.Bc4 0-0 11.0-0 Bb7 12.d4 Nd5; 7...Bb7 8.cd5 ed5 9.Nf3 Bd6 10.e3 0-0 11.Be2 Re8 12.0-0 Nbd7) 8.Na4 Nbd7 9.Nf3 0-0 10.e3 Bb7 11.cd5 Bd5 12.Be2 c5; B) 7.cd5 ed5 (7...Nd5 8.Nc3 Nc3 9.Bc3 Nd7 10.Nf3 Nc5 11.e3 Bb7 12.Ne5 Be7; 7...Qd5 8.Nc3 Qh5 9.e3 Qd1 10.Rd1 Nbd7 11.Nf3 Bb7 12.d4 Bd6; 7...Bd6 8.e4 Ne4 9.Qg4 ed5 10.Qg7 Rf8 11.Nf3 Qe7 12.Be2 f6; 7...Be7 8.de6 Be6 9.d4 0-0 10.Nf3 Nbd7 11.Qd3 Re8 12.Nc3 Nd5) 8.Nf3 Bd6 9.Nc3 Nbd7 10.d4 0-0 11.e3 Bb7 12.Bd3 h6; C) 7.e3 Nbd7 (7...Bd6 8.Nc3 0-0 9.Na4 Nbd7 10.Nf3 Qe7 11.Be2 dc4 12.Qc2 Bb7; 7...Be7 8.Nc3 0-0 9.Nf3 Nbd7 10.Na4 Ne4 11.Qc2 Bb7 12.cd5 Bd5; 7...Bb7 8.Nf3 Nbd7 9.Nc3 Bd6 10.cd5 ed5 11.Na4 0-0 12.Be2 Re8; 7...c5 8.bc6 Nc6 9.cd5 Qd5 10.Bf6 gf6 11.Nc3 Qf5 12.Nf3 Bb7) 8.Nc3 Bd6 9.Na4 0-0 10.Nf3 Bb7 11.cd5 Bd5 12.Be2 c5; D) 7.Qc2 Nbd7 (7...Bb7 8.Nf3 Nbd7 9.e3 Bd6 10.Nc3 0-0 11.Na4 c5 12.Bd3 dc4; 7...Bd6 8.Nf3 0-0 9.Nc3 Bb7 10.cd5 ed5 11.e3 Nbd7 12.Na4 Qe7; 7...d4 8.Nf3 c5 9.e3 Bb7 10.Be2 Nbd7 11.ed4 cd4 12.Nd4 Bg2; 7...Be7 8.Nf3 Nbd7 9.Nc3 0-0 10.Na4 h6 11.e3 Ne4 12.Bd3 Bb7) 8.cd5 Nc5 9.Nc3 Nd5 10.Nf3 Bb7 11.e3 Nc3 12.Qc3 Ne4; E) 7.Nf3 Nbd7 (7...Bd6 8.g4 Ng4 9.Bh3 h5 10.cd5 0-0 11.Nc3 ed5 12.Qc2 Be7; 7...Be7 8.Nc3 0-0 9.cd5 ed5 10.Nd4 Bb7 11.e3 Nbd7 12.Na4 Ne5; 7...Bb7 8.Nc3 Bd6 9.e3 0-0 10.cd5 ed5 11.Na4 Nbd7 12.Be2 Qe7; 7...dc4 8.e3 Nbd7 9.Bc4 Bd6 10.Nc3 0-0 11.Na4 Bb7 12.Nc3 Ng4) 8.Nc3 Bd6 9.Na4 0-0 10.e3 Ne4 11.Qc2 Bb7 12.Be2 Qe7.

6.h4 d6 A) 7.Nc3 Nbd7 (7...Bb7 8.Nf3 Nbd7 9.Na4 Be7 10.h5 h6 11.e3 0-0 12.Be2 Ra7; 7...Be7 8.Nf3 Bb7 9.h5 h6 10.Na4 0-0 11.e3 Nbd7 12.Be2 Ra7; 7...h6 8.Nf3 Nbd7 9.d4 Be7 10.e3 Bb7 11.Bd3 0-0 12.Qc2 Ng4) 8.Nf3 Be7 9.e3 Bb7 10.Na4 0-0 11.Qc2 h6 12.Be2 Ne4; B) 7.d4 Be7 (7...Nbd7 8.Nf3 Be7 9.g3 Bb7 10.Bg2 0-0 11.Nc3 Ra5 12.0-0 Qa8; 7...Bb7 8.Nc3 Be7 9.Nf3 0-0 10.g3 Nbd7 11.Bg2 Ra5 12.0-0 Qa8; 7...g6 8.Nc3 Bb7 9.Nf3 Nbd7 10.e3 Bg7 11.Be2 0-0 12.0-0 e5; 7...h6 8.Nc3 Nbd7 9.Nf3 Be7 10.e3 0-0 11.Bd3 Bb7 12.Qc2 Ng4) 8.Nf3 Nbd7 9.Nc3 Bb7 10.g3 0-0 11.Bg2 e5 12.0-0 ed4 ; C) 7.Qc2 Be7 (7...g6 8.Nc3 Bg7 9.Nf3 Bb7 10.e3 Nbd7 11.Na4 0-0 12.Be2 Qe7; 7...Nbd7 8.Nf3 Bb7 9.Nc3 Be7 10.Na4 0-0 11.e3 Be4 12.d3 Bb7; 7...Bb7 8.Nc3 Nbd7 9.Nf3 Be7 10.Na4 0-0 11.e3 Be4 12.d3 Bb7; 7...h6 8.Nc3 Nbd7 9.Nf3 Bb7 10.d4 Be7 11.e3 0-0 12.Bd3 Ng4) 8.Nc3 Bb7 9.Nf3 Nbd7 10.Na4 0-0 11.e3 h6 12.Be2 Ne4 ; D) 7.h5 Nbd7 (7...Bb7 8.Nc3 Nbd7 9.Nf3 Nc5 10.Qc2 Be7 11.h6 g6 12.d4 Nce4; 7...Be7 8.Nc3 h6 9.Nf3 Nbd7 10.Na4 0-0 11.e3 Bb7 12.Be2 Ra7; 7...h6 8.Nc3 Nbd7 9.Nf3 Be7 10.e3 0-0 11.Na4 Bb7 12.Be2 Ra7; 7...e5 8.Nf3 Bg4 9.h6 gh6 10.Nc3 Nbd7 11.Na4 Bg7 12.Qc2 0-0) 8.d4 Bb7 9.Nc3 h6 10.Nf3 Be7 11.e3 0-0 12.Qc2 Ng4; E) 7.Nf3 Be7 (7...Nbd7 8.Nc3 Be7 9.e3 Bb7 10.Na4 0-0 11.Qc2 h6 12.Nc3 Ne5; 7...Bb7 8.Nc3 Nbd7 9.Na4 Be7 10.e3 0-0 11.Qc2 h6 12.Nc3 Ne5; 7...h6 8.Nc3 Nbd7 9.e3 Be7 10.d4 0-0 11.Bd3 Bb7 12.Qc2 Ra7; 7...Ng4 8.Qc2 Bb7 9.Nc3 Nd7 10.Na4 Ndf6 11.Nc3 Be7 12.e3 Ne5) 8.Nc3 Nbd7 9.Na4 0-0 10.e3 Bb7 11.Qc2 h6 12.Nc3 Ne5.

6.h4 Bd6 A) 7.Nf3 0-0 (7...Bb7 8.Nc3 0-0 9.Na4 Qe7 10.e3 Ng4 11.Be2 f5 12.Qc2 Ra7; 7...Qe7 8.e3 0-0 9.Nc3 Bb7 10.Na4 Ng4 11.Be2 f5 12.Qc2 Ra7; 7...Ra7 8.Nc3 Bb7 9.Na4 0-0 10.Qc2 Qe7 11.e3 Be4 12.d3 Ba8; 7...Ra5 8.Nc3 Bb7 9.e3 0-0 10.Na4 Qe7 11.Qc2 Be4 12.d3 Bb7) 8.Qc2 Bb7 9.Nc3 e5 10.e3 e4 11.Nd4 Be5 12.Na4 c5; B) 7.e3 Bb7 (7...0-0 8.Nc3 Bb7 9.Nf3 e5 10.Be2 g6 11.0-0 e4 12.Nd4 Nh5; 7...h6 8.Nf3 0-0 9.Nc3 Be7 10.Na4 d6 11.Qc2 Bb7 12.Be2 Nbd7; 7...e5 8.Nc3 e4 9.Nh3 Bb7 10.Na4 0-0 11.Be2 Qe7 12.0-0 Be5; 7...Ra7 8.Nc3 Bb7 9.Nf3 0-0 10.Qc2 Be7 11.Rh3 d5 12.cd5 ed5) 8.Nc3 0-0 9.Na4 Be7 10.Nf3 d6 11.Be2 Nbd7 12.0-0 Ne4; C) 7.Qc2 Bb7 (7...e5 8.Nf3 0-0 9.Nc3 Bb7 10.e3 e4 11.Nd4 Be5 12.Na4 c5; 7...h6 8.Nc3 Bb7 9.Nf3 Be7 10.Rh3 0-0 11.e3 d6 12.d4 Nbd7; 7...Qe7 8.Nf3 Bb7 9.Nc3 0-0 10.e3 Ng4 11.Na4 f5 12.Be2 Ra7; 7...g6 8.Nc3 Bb7 9.Nf3 0-0 10.Na4 Qe7 11.e3 Be4 12.d3 Bb7) 8.Nc3 Ng4 9.Na4 Be5 10.Be5 Ne5 11.d4 Ng4 12.Nf3 Qf6; D) 7.h5 Bb7 (7...h6 8.Nc3 Bb7 9.Nf3 Ng4 10.Na4 e5 11.e3 0-0 12.Be2 e4; 7...Qe7 8.Nf3 Bb7 9.e3 Ra7 10.Nc3 h6 11.Bd3 0-0 12.Na4 e5; 7...Ra5 8.Nc3 Bb7 9.Na4 h6 10.Nf3 0-0 11.Qc2 Qe7 12.e3 e5; 7...Ra7 8.Nc3 Bb7 9.e3 h6 10.Nf3 Qe7 11.Bd3 e5 12.Nh4 0-0) 8.Nc3 h6 9.Nf3 0-0 10.Na4 Qe7 11.e3 e5 12.Be2 Ra7; E) 7.Nc3 Bb7 (7...0-0 8.Na4 Bb7 9.Nf3 Re8 10.Qc2 c5 11.Nc3 Bc7 12.a4 d5; 7...Qe7 8.Nf3 Bb7 9.e3 0-0 10.Qc2 Ng4 11.Na4 f5 12.Be2 Ra7; 7...h6 8.Nf3 Bb7 9.e3 0-0 10.Qc2 Qe7 11.Be2 Ra7 12.Na4 e5; 7...e5 8.Nf3 Bb7 9.e3 0-0 10.Be2 g6 11.Qc2 e4 12.Nd4 c5) 8.Nf3 0-0 9.Na4 Qe7 10.e3 Ng4 11.Qc2 f5 12.Be2 Ra7.

6.h4 Be7 A) 7.Nf3 d6 (7...Bb7 8.Qc2 d6 9.Nc3 Nbd7 10.Na4 0-0 11.e3 Be4 12.d3 Bb7; 7...0-0 8.Qc2 d6 9.Nc3 Nbd7 10.Na4 Bb7 11.e3 h6 12.Be2 Ne4; 7...d5 8.Qc2 0-0 9.Nc3 Nbd7 10.Na4 Bb7 11.cd5 ed5 12.e3 Ne4; 7...h6 8.Nc3 Bb7 9.Na4 d6 10.g3 Nbd7 11.Bg2 0-0 12.0-0 Ra5) 8.Nc3 Nbd7 9.Na4 Bb7 10.e3 0-0 11.Be2 Ne4 12.Qc2 h6 ; B) 7.e3 0-0 (7...d5 8.Nf3 Nbd7 9.Nc3 0-0 10.Na4 Ne4 11.Be2 Bb7 12.cd5 Bd5; 7...d6 8.Nf3 Nbd7 9.Nc3 0-0 10.Na4 Bb7 11.Qc2 Be4 12.d3 Bb7; 7...Bb7 8.Nc3 0-0 9.Nf3 d6 10.Na4 Nbd7 11.Qc2 h6 12.h5 Ra5; 7...Ne4 8.Nc3 Nc5 9.Qg4 Bb7 10.Nf3 d6 11.Qg7 Bf6 12.Qh6 Nbd7) 8.Nf3 d6 9.Nc3 Nbd7 10.Na4 Bb7 11.Be2 Ne4 12.Qc2 h6; C) 7.h5 d6 (7...h6 8.Nf3 d6 9.Nc3 Bb7 10.Na4 Nbd7 11.e3 0-0 12.Be2 Ra5; 7...Bb7 8.h6 g5 9.Nc3 d6 10.Nf3 g4 11.Nd4 Nbd7 12.Na4 Rg8; 7...d5 8.h6 gh6 9.Nf3 dc4 10.Nc3 Nbd7 11.Rh4 Nc5 12.Rc4 Bb7) 8.Nf3 Nbd7 9.h6 gh6 10.Nc3 Ng4 11.Nd5 Ndf6 12.Ne7 Ke7; D) 7.Qc2 Bb7 (7...d6 8.Nc3 0-0 9.Nf3 Nbd7 10.g3 Bb7 11.Bg2 Ne5 12.Na4 Ra5; 7...0-0 8.Nf3 d6 9.Nc3 Nbd7 10.Na4 Bb7 11.e3 h6 12.Be2 Ne4; 7...d5 8.Nf3 0-0 9.cd5 Qd5 10.Nc3 Qb3 11.Qb3 ab3 12.e3 Nbd7; 7...h6 8.Nc3 d6 9.Nf3 Nbd7 10.d4 Bb7 11.e3 Ra7 12.Bd3 0-0) 8.Nc3 d6 9.Nf3 Nbd7 10.Na4 0-0 11.e3 h6 12.Be2 Ne4; E) 7.Nc3 d6 (7...Bb7 8.e3 d6 9.Nf3 Nbd7 10.Na4 0-0 11.Be2 Ne4 12.Qc2 h6; 7...0-0 8.Nf3 d6 9.Na4 Nbd7 10.e3 Ne4 11.Nc3 Ndc5 12.Ne4 Ne4; 7...d5 8.cd5 ed5 9.Nf3 0-0 10.Nd4 Bb7 11.Na4 Nbd7 12.e3 Ne5; 7...h6 8.Nf3 0-0 9.Qc2 Bb7 10.e3 d6 11.d4 Nbd7 12.Bd3 Ra7) 8.e3 Nbd7 9.Na4 0-0 10.Nf3 Bb7 11.Qc2 Be4 12.d3 Bb7.

3.Bb2 b6

4.a4 Bb7 (--> 1.b4 a5 2.b5 b6 3.a4 Bb7 4.Bb2 Nf6).

4.a4 c5 5.e3 d5 6.c3 e5=+ 7.c4 d4 8.d3 de3 9.fe3 Bf5?? (9...Bd6!?=) 10.Be5?? (better 10.Qf3 Bd3 11.Bd3+– (11.Qa8?! Bf1 12.Be5 Nfd7 13.Bb8 Bd3+–)) 10...Nbd7+= 11.Bb2 Bd6 12.Nf3 0-0 13.Be2 Re8 (better 13...Ng4 14.Qc1 Qc7=) 14.0-0 (better 14.e4!? Bg6 15.0-0+–) 14...Re3 15.d4 (15.Nh4 Bh2 16.Kh1=+) 15...Bb1 (better 15...Qe7 16.Re1 Re8–+) 16.dc5?? (better 16.Rb1 Qc7 17.Qc2=) 16...Bc5–+ 17.Kh1 (17.Bd4 Bd4 18.Nd4 Bg6–+) 17...Bg6 (17...Qe7 18.Rb1 Re2 19.Nd4 Bd4 20.Bd4–+) 18.Nd4 (18.Nh4 Be4–+) 18...Qe8 (better 18...Ne5 19.Nb3 Qd1 20.Bd1–+) 19.Bf3 (19.Ra2 Rd8 20.Bf3 Ne5–+) 19...Ne5 (better 19...Rd3 20.Qc1 Bd4 21.Ba8 Qa8 22.Bd4 Rd4–+) 20.Ba8 Qa8 Black is in command 21.Nc2? (21.Nf5 Bh5 22.Qd2 Nc4–+) 21...Nc4 (better 21...Rd3 22.Qe2 Nc4–+) 22.Bf6 gf6 23.Ne3 Ne3 Do you see the mate threat? (23...Be3?! 24.Rf6 Kg7 25.Rc6=) 24.Qf3 Qe4 (24...Be4 25.Qg3 Kh8 26.Rf2–+) 25.Qe4 (better 25.Rae1!? f5 26.Re2–/+) 25...Be4–+ 26.Rf2 Ng4 (26...Nc2!? 27.Re2 Na1 28.Re4–+) 27.Re2 Bd5 (27...f5 28.Rd2–/+) 28.h3=+ Ne5 29.Rf1? (29.Rd2 Be4=+) 29...Kg7 (29...Bc4!? 30.Ree1 Bb4 31.Rd1 Bf1 32.Rf1–+) 30.Rd2 (30.Rd1 Bc4 31.Red2 Bb3–/+) 30...Bc4 31.Rd6?? (better 31.Rb1–/+) 31...Bf1 32.Rd7 (32.Rd1 Bc4 33.Rb1 f5–+) 32...Bc4 (better 32...Nd7 33.Kh2–+) 33.Rc7 (33.Rd1 Bb3 34.Ra1 Nc4–+) 33...Be6 34.Rb7 Nd3 (better 34...Bd5 35.Rb8 Bb3–+) 35.g4 (35.Kh2 Bb3 36.Rd7 Ne5–+) 35...Nf4 (better 35...Bd5 36.Kh2 Bb7 37.h4–+) 36.g5 (36.Rc7 Nh3 37.Kg2 Nf4 38.Kg3 Ng6–+) 36...fg5 (36...Bd5 37.Kh2 Bb7 38.g6 Ne2 39.h4 Bd6 40.Kh3 h5 41.gf7 Ng1) 37.Rf7 Kf7 38.Kh2 Kf6 39.Kh1 (39.Kg3 Kf5 40.h4 g4 41.h5 Bd5 42.h6 Ne2 43.Kh4 Bf2 44.Kh5 Nf4) 39...Ke5 (39...Bd5 40.Kh2 Ne2 41.h4 g4 42.h5 Bd6) 40.Kh2 Kf5 (40...Bd5 41.h4 g4 42.Kg3 Kf5 43.Kh2 Bf2 44.h5 g3) 41.Kg3 (41.h4 g4 42.Kg3 Bd5 43.Kh2 Bf2 44.h5 g3) 41...Ke4 (41...Bd5 42.Kh2 Ne2 43.h4 Bd6 44.Kh3 g4) 42.h4 Ke3 (42...Nh5 43.Kh2 Kf3 44.hg5 Kf2 45.Kh1 Kg3 46.g6 Bd5) 43.h5 (43.h5 Ne2 44.Kg2 Bd5 45.Kh3 Bf3 46.h6 g4 47.Kh4 Be7 48.Kh5 g3; 43.Kh2 g4 44.Kg3 Ne2 45.Kg2 Bd5 46.Kf1 Kd2 47.h5 Ng3). RichardSommer (2020) – simon46 (2055), lichess.org, 2020.

4.a4 c6 5.c4 cb5 6.cb5 d6 7.e3 (better 7.Bf6 ef6 8.e3=) 7...Bf5 (7...e5 8.d4 e4 9.d5=) 8.Nf3 (better 8.Bf6!? Bb1 9.Bg7 Bg7 10.Rb1+–) 8...e6 (8...e5 9.Nc3 Nbd7 10.Bc4=) 9.Be2 Be7 10.0-0 0-0 11.d3 Nbd7 12.Nbd2 (12.Nh4 Bg6+=) 12...Rc8 (12...Nc5 13.Nc4+=) 13.Rc1 (13.Nd4 Nc5 14.Nf5 ef5+=) 13...Nc5 (13...Rc1 14.Qc1 Nc5 15.Qc4=) 14.e4 Bg6 (14...Bg4 15.Re1=) 15.Re1 (15.Nd4 d5 16.Nc6 Qe8+–) 15...h6 (15...d5 16.e5 Nh5 17.Ba3=) 16.Bf1 White plans e5 (16.Nd4 Qe8+=) 16...Re8 (better 16...d5=) 17.d4 (17.Nd4 Qd7+=) 17...Ncd7 (better 17...Nce4!? 18.Ne4 Be4–/+) 18.e5 (18.Rc8 Qc8 19.Qb3 d5=) 18...de5 19.de5 Ng4?? (better 19...Rc1 20.Qc1 Nd5=) 20.h3+– Rc1 21.Qc1 Nge5 (better 21...Nf2 22.Kf2 Nc5+–) 22.Ne5 (22.Re5?! Ne5 23.Be5 Bc5+–) 22...Ne5 23.Re5 (23.Be5 Bg5 24.f4 Be7+–) 23...Bf6 (23...Bg5 24.Bc3+–) 24.Nf3 (24.Re1 Bb2 25.Qb2 Re7+–) 24...Be5 25.Ne5 Be4 26.Nc6 (26.Qf4 f5+–) 26...Qa8 (26...Bc6!? 27.bc6 Qc7 28.Qd1+–) 27.Qc3 (27.Qe3 Bc6 28.bc6 Qc6+–) 27...f6 28.Ba3 (better 28.Qe3 Bc6 29.bc6 Qc6 30.Bb5+–) 28...Rc8?? (28...Qb7 29.Qe3 Bd5 30.Bd3+–) 29.Bc4 (better 29.Ne7 Kh7 30.Qc8 Qc8 31.Nc8 g5+–) 29...Kf7?? (29...Rc6 30.bc6 Qc6 31.Qb3+–) 30.Qb3 (better 30.Be6 Ke6 31.Qc4 Bd5 32.Qg4 Kf7 33.Qd7 Kg8 34.Ne7 Kh7 35.Qf5 Kh8 36.Qc8 Qc8 37.Nc8+–) 30...Rc6 31.bc6 Qc6 32.f3 Bf5 (32...Bd5 33.Bb5+–) 33.g4 (33.Bc1 Qd6+–) 33...Bg6 34.Kg2 (34.Bc1 h5+–) 34...h5 35.Bb5 (35.Bc1 h4+–) 35...Qc7 36.Qd1 hg4 37.hg4 (37.fg4? Be4 38.Kf1 Qf4 39.Ke1 Qg3 40.Kd2 Qa3–+) 37...Kg8 38.Qd6 Qc2 39.Kg3 Qc8? (39...e5 40.Qb6 Qc3 41.Bc5+–) 40.Qe7 (better 40.Qb6 Qc3 41.Qe6 Kh7+–) 40...Kh7 (40...e5 41.Bd6 Qc1 42.Qd8 Kh7 43.Qb6 Qf4 44.Kg2 Qd2 45.Kf1 Bd3 46.Kg1+–) 41.Bd7?? (better 41.Bb2 e5 42.g5+–) 41…Qc7 (41...Qc7 42.Qd6 Qc3 43.Be6 Qe1 44.Kf4 Bc2 45.Bf5 Bf5 46.Kf5 Qe3 47.Qh2 Kg8 48.Qa2 Kh7+–). e4_e5_f4 (1730) – Kolivan (1745), lichess.org, 2021.

4.c4 e6 5.Nf3 Bb7 6.d4 (6.Nc3!?+=) 6...Bb4= 7.Nbd2 (7.Nc3 Ne4 8.Qd3 Qf6+=) 7...d6 (7...a4 8.a3 Ba5 9.e3=) 8.a3= Bd2 9.Nd2 Nbd7 10.Qc2 Qe7 11.e4 e5 12.d5 Nc5 13.Be2 a4 14.0-0 g5 (14...0-0 15.Rae1=) 15.Rae1+= h5 16.Bd1 (16.Bc3 Kf8+=) 16...h4 17.Bc3 (17.h3 0-0-0=) 17...Bc8 18.Bb4 g4 (18...h3 19.g3=) 19.Bc5 bc5 (19...dc5 20.f4 Nh5 21.Qc3=) 20.Nb1+= Nh5 21.g3 Qg5 22.Qd2 Qg6 (22...Qd2 23.Nd2 Ke7 24.Nb1= (worse is 24.gh4 Nf4–/+)) 23.Nc3+= f5 24.ef5 Bf5 25.Re3 (worse is 25.Na4 Bd3+=; worse is 25.gh4 Kf7 26.Qe3 Nf4–/+) 25...Qh6 26.Qe2 (worse is 26.Na4 hg3 27.fg3 Ng3=; worse is 26.gh4 Nf4 27.f3 gf3 28.Rff3 0-0-0–/+) 26...0-0-0 (26...0-0 27.Bc2 hg3 28.hg3 Bc2 29.Qc2=) 27.Ba4 Nf4?? (better is 27...Nf6+/–) 28.gf4+– ef4 29.Re7 g3 (29...f3 30.Qe3+–) 30.b6! Qg6 (30...cb6 31.Ra7 Combination) 31.Rc7 Kb8 32.Qe7 Rd7 33.Rd7 Bd7 34.Qd7 Rh7 35.Qd8 Kb7 36.Re1 Qg7 37.Qc7! (37.Qc7 Qc7 38.bc7 Rc7 39.Ne4+–) 1–0. Krivanek,Vladimir (2180) – Jelinek,Michal (1920), Praha CZE, Zlata Praha Open, 2014.

4.d4 e6 5.Nd2 d5 6.g3 c6 7.bc6 Nc6 8.Bg2 Be7 9.Ngf3 0-0 10.0-0 Bb7 11.a4 Rc8 12.Ba3 Nb4 13.Rc1 (better is 13.h3!?–/+) 13...Na2–+ 14.Be7 Qe7 15.Ra1 Nc3 16.Qe1 Ba6 0–1. bobby fissure – PeterRs, ChessWorld.net, 2012.

4.e3 c5 5.Nf3 Bb7 6.d4 d6 7.c4 (7.dc5 bc5 8.c4 Nbd7+=) 7...cd4= 8.ed4 e6 9.Be2 d5 10.0-0 Nbd7 11.Nc3 Bd6 12.a4 0-0 13.Re1 Rc8 14.cd5 Nd5 15.Ne4 Bb4 16.Rf1 Nf4 17.Rc1?? (better is 17.Ng3–/+) 17...Be4–+ 18.Nd2 (18.Kh1–+) 18…Qg5 (18...Qg5 19.Bf3 Bf3 20.Qf3 Bd2–+) 0–1. craig4000 – PeterRs, ChessWorld.net, 2012.

4.e3 d5 5.Nf3 (5.Be2 e6=) 5...Nbd7 (5...e6 6.Be2=) 6.Rg1 (6.Be2 e6=) 6...Bb7 7.g4 e6 8.g5 Ng8 (8...Ne4 9.d3 Nd6 10.Nd4=) 9.h4 Bc5?? (better 9...Ne7+=) 10.Bg7+– Ne7 (10...Bd6 11.Bh8 Ne7 12.d4+–) 11.Bh8 e5 (11...Bd6 12.d4+–) 12.Ne5 Ne5 13.Be5 Qd7 14.Qh5 0-0-0 (14...Qf5 15.d4 Bb4 16.c3+–) 15.Qh7 (15.Qf7 Nf5 16.Qd7 Kd7+–) 15...Nf5 (15...Ng6 16.Bf6 Nf8+–) 16.Bh3 (16.Bh3 Kb8 17.Bf5+–) 1–0. FeegLood (2380) – preschema (1870), lichess.org, 2015.

4.e3 Nd5 5.Qf3 e6?? (better is 5...c6+=) 6.c4+– Nb4?? (6...Bb7+–) 7.Qa8 Ba6 (7...Nc2 8.Kd1 Na1 9.Qb8+–) 8.Kd1 Bb5 9.cb5 Bc5 (9...Nd5 10.Nf3+–) 10.e4 0-0 11.a3 Bf2 12.Nh3 Bc5 13.ab4 Bb4 14.Nc3 Qh4 15.Qb7 c6 (15...Qd8 16.Be2+–) 16.Qb6 Bc3 17.Bc3 Qe4 18.Ra5 cb5 19.Qb5 Nc6 (19...f6 20.Ra4 Qg6 21.Bd3+–) 20.Ra4 Qg6 21.Nf4 Qg4 22.Be2 Qh4 23.Ne6! Qa4 (23...de6 24.Qc4 Double attack (24.Rh4 Discovered attack; 24.Qc6 Deflection; 24.Qc4 Decoy; 24.Qc6 Overloading); 23...fe6 24.Rh4 Discovered attack) 24.Qa4 de6 25.Qc6 Re8 26.Qe8 1–0. Janek – Zack, internet, 2016.

4.Nf3 e6 5.a4 (5.e3 Bb7=) 5...d5 6.e3 Bb7 7.Be2 Nbd7 (7...Bd6 8.0-0=) 8.0-0 c5 (8...Bb4 9.Ba3=) 9.c4 (9.bc6 Bc6 10.Nd4 Bb7+=) 9...Qc7 (9...Bd6 10.cd5 Bd5 11.Nc3=) 10.Na3 (10.cd5 Bd5 11.Nc3 Bb7=) 10...Bd6 11.h3 (11.cd5 e5 12.Nh4 e4=) 11...0-0-0 (11...0-0 12.Rc1=) 12.d4+= Ne4 (12...Ne4 13.cd5 Bd5+=; 12...e5 13.Rc1+=) (30 moves). Davis,E – Phelps,LJ, Dayton, 1977.

4.Bf6 ef6 5.e3 =.

4.Bf6 gf6 5.Nf3 Bb7 6.e3 (6.Nc3 f5=) 6...f5 (6...Rg8 7.Nc3=) 7.Bd3 (7.d4 e6+=) 7...Bg7 (7...e6 8.Be2=) 8.Nc3 (8.c3 e6=) 8...e6 9.0-0 (9.Be2 Bc3 10.dc3 Rg8=) 9...d6 (9...Rg8 10.Be2=) 10.Be2 (10.Qe2 Rg8=) 10...Nd7 (10...Bc3 11.dc3 Rg8 12.Qd2=) 11.d4 0-0 (11...Rg8 12.Nb1=) 12.a4 (12.Rb1 Re8+=) 12...Kh8 (12...Qf6 13.Qd2=) 13.Re1 (13.Nd2 f4 14.Bf3 d5=) 13...Rg8 14.Qd3 Nf6 (14...Qf6 15.Rab1=) 15.Nd2 Bh6 (15...e5 16.Nb3=) 16.Bf3+= d5 17.Ne2 Ne4 18.g3 (18.c4 dc4 19.Qc2 c5+=) 18...c6 (18...Bf8 19.Rec1=) 19.bc6 (19.c4 dc4 20.Nc4 cb5+=) 19...Ba6+= 20.c4 Nd2 (20...Rc8 21.Be4 (21.Ne4 fe4 22.Be4 de4 23.Qe4 Bc4–+) 21...fe4 22.Qb3 Rc6 23.cd5 Qd5 24.Rac1 Qb3 25.Nb3 Rc1 26.Nec1+=) 21.Qd2= Bc4 22.Rac1 Rc8 23.Rc4 dc4 24.Qc3 Bf8 (24...Qf6 25.Bg2+=) 25.d5 (25.Qc4 Rg7+=) 25...Bg7 (25...Rg7 26.Qc4 e5 27.Bg2+=) 26.Qc4+= e5 (26...Qd6 27.Rb1+=) 27.Bg2+/– Bf8 28.Bh3 Qf6 29.e4 Bc5 30.Bf5+– Rc7 31.Nc3 h5? 32.Nb5 Rcc8 33.Qe2 Qg5 34.Bc8 Rc8 35.c7 h4 36.Kf1 hg3 37.fg3 (37.fg3 Kg8 38.Rd1+–) 1–0. PostModernist – inmortal, ICS, 2000.

4.c4 Bb7

5.a4 d6 6.e3 Nbd7 7.Nf3 e5 8.Be2 Qe7 9.0-0 g6 10.d4 Bg7 11.Nc3 0-0 12.Rc1 Ne4 13.Ne4 Be4 14.Nd2 Bb7 15.Bf3 e4 16.Be2 Rad8 17.Re1 f5 18.Ba1 (18.Qb3 Rf7+=) 18...f4 19.ef4 Rf4 20.Nf1 (better 20.Bf3!?+=) 20...Rdf8=+ 21.f3 ef3 (21...Qh4!? 22.Nd2 e3=+) 22.Bf3+= Bf3 23.Re7 Bd1 24.Rd1 R8f7 25.Rf7 Kf7 26.Ne3 Re4 (26...Nf6 27.Re1=) 27.Nd5+= Re2 28.Nc7 (better 28.Bc3+=) 28...Nf6?? (better 28...Ra2!? 29.Rf1 Kg8=) 29.Rc1 (better 29.d5!?+–) 29...Bh6 30.Rd1 (30.Rf1 Be3 31.Kh1 Kg8+=) 30...Be3= 31.Kf1 (better 31.Kh1!?=) 31...Rf2–/+ 32.Ke1 Rg2 33.c5 (33.d5 Rh2 34.Bf6 Kf6–+) 33...bc5 (better 33...dc5 34.dc5 Bc5–+) 34.dc5=+ Bc5 The passed pawn on b5 will quickly become a dangerous weapon (34...dc5 35.Bf6 Kf6 36.Nd5 Ke6 37.Ne3 Rh2 38.b6+–) 35.Bf6 Kf6 36.b6 Rb2 (better 36...Rh2!? 37.b7 Ba7 38.Rd6 Ke7=) 37.Nb5+– Attacking the isolated pawn on d6 37...Bb6 38.Rd6 Kf5 (38...Kg5 39.Rb6 Rb4 40.Rb7+–) 39.Rb6+– Rh2 40.Ra6 h5 41.Ra5 Kf4 42.Nd4?? (better 42.Ra8+–) 42...g5?? (better 42...Ke3 43.Kf1 Kd4=+) 43.Ne6+– Ke3 The mate threat is Rh1 44.Re5 Kd3 45.Rg5?? (better 45.a5+–) 45...Ra2?? (45...Re2 46.Kd1 Re6 47.Rh5=) 46.a5 (46.Nc5 Kc4 47.Rh5 Kb4+–) 46...h4?? (better 46...Re2 47.Kf1 Re6 48.Rh5 Kc3=) 47.Rh5 (47.Kf1 Ke3+–) 47...Ke3? (47...Re2 48.Kf1 Re6 49.Rh4=) 48.Kd1 (48.Kf1 Kf3 49.Kg1 h3 50.Nd4 Kg4+–) 48...Kd3 (48...Kf3 49.Kc1+–) 49.Kc1 Kc3 The mate threat is Ra1 50.Kb1 Rb2 51.Kc1?? (better 51.Ka1 Rb4 52.Rc5 Kb3 53.Re5+–) 51...Ra2= Do you see the mate threat? 52.Rc5 Kb4 The isolani on a5 becomes a target 53.Rd5 (53.Re5!? Ra5 54.Re4 Kc3 55.Re3 Kc4 56.Rh3+=) 53...Ra5= 54.Rd4 Kb5 (better 54...Kc3!? 55.Kd1 h3=) 55.Rh4+– Ra4 56.Nc7 Ka5 57.Rh5 Kb4?? (better 57...Kb6 58.Nd5 Kc6+–) 58.Nd5+– Kb3 59.Rh3 Ka2 60.Nc3 Kb3 61.Na4 Ka4 62.Rc3 (62.Rc3 Kb4 63.Kb2 Ka4 64.Rb3 Ka5 65.Ka3 Ka6 66.Ka4 Ka7 67.Ka5 Ka8 68.Kb6 Kb8 69.Rc3 Ka8 70.Rc8) 1–0. BeepBeepImAJeep (2760) – Sick_clown (2690), lichess.org, 2020.

5.a4 d6 6.e3 e5 7.Nf3 Nbd7 8.Be2 Nc5 9.d4 Nce4 10.de5 de5 11.Qd8 Rd8 12.Ne5 Bd6 13.0-0 0-0 14.Nf3 h6 15.Nc3 Nc5 16.Rad1 Be7 (16...Nfe4!?+=) 17.Nd4+– Nce4 (17...g6 18.f3+–) 18.Bf3 White fights for the Initiative 18...Nc3 19.Bc3 (19.Bb7?! Nd1 20.Rd1 Bd6=) 19...Bf3 20.gf3 Bc5 21.Nc6 Rd1 22.Rd1 Nh5 (22...Ne8 23.Rd8+–) 23.f4 (23.Rd5 Nf6 24.Bf6 gf6 25.Na5 Ra8+–) 23...g6 (23...f5 24.Rd5+–) 24.Rd5 (24.Rd7!? Bd6+–) 24...Ng7 25.Bg7 Kg7 26.Na5 Ra8 27.Nb3 Bd6 28.c5 bc5 29.Nc5 Bc5 30.Rc5 Ra4 31.Rc7 Rb4 32.Rc5 Kf6 33.Kg2 Ke6 34.h4 f5 (better 34...Kd6 35.Rc6 Kd5+–) 35.Kf3 Rb3 36.Re5 (36.Rc6 Kf7 37.b6 Rb1+–) 36...Kf6 37.Ke2 (37.Kg3 Rb1+–) 37...g5 38.hg5 hg5 39.Rc5 g4 (39...gf4 40.ef4 Rb2 41.Kd3 Rf2 42.b6+–) 40.Kf1 Rb1 41.Kg2 Rb2 42.Kg3 Rb3 43.Rc6 Ke7 44.b6 Kd7 45.Rh6 (45.Rh6 Rb2 46.b7+–) 1–0. BeepBeepImAJeep (2590) – Wazaha (1970), lichess.org, 2016.

5.a4 e6 6.e3 Be7 7.Nf3 0-0 8.Be2 d5 9.0-0 dc4 10.Bc4 c6 11.d4 cb5 12.ab5 Nbd7 13.Be2 Rc8 14.Nbd2 e5 (better 14...Re8!?=) 15.Ne5 Ne5 16.de5 Nd5 17.Bf3 Nc3 (17...Re8 18.Qa4+–) 18.Bc3 Bf3 19.Nf3 (19.Qf3 Rc3 20.Ne4 Rb3+–) 19...Rc3 20.Nd4 Bc5 21.Nc6 Qg5 (21...Qd1 22.Rfd1 Ra8 23.Rd7+–) 22.Kh1 (22.Qf3 Qg6+–) 22...Qe5?? (better 22...Qf5+–) 23.Ne5+– (23.Ne5 Be7 24.Nd7+–) 1–0. BeepBeepImAJeep (2585) – UtotinNo (2080), lichess.org, 2017.

5.a4 e6 6.e3 Be7 7.Nf3 0-0 8.Be2 d5 9.0-0 dc4 10.Bc4 Nbd7 11.d4 c6 12.Nbd2 cb5 13.ab5 Rc8 14.Bd3 Qc7 15.Ne5 Qb8 16.f4 Qa8 17.Qe2 Rfd8 18.Rfc1 Nf8 19.Ndf3 Ne4 20.Be4 (20.Nc4 Nd7+=) 20...Be4 21.Ng5 (21.Nd2 f6 22.Ne4 fe5= (22...Qe4? 23.Nc6 Ng6 24.Nd8 Rd8 25.Rc2+–)) 21...f6 (21...Bg5 22.fg5 Nd7 23.Rc8 Rc8 24.Nd7=) 22.Ne4+= fe5 (22...Qe4? 23.Nc6 Ng6 24.Nd8 Rd8 25.Rc6+–) 23.Ng3 (23.Qf3!?=) 23...ef4=+ 24.ef4 Bf6 25.Rc8 Rc8 26.Rd1 (26.Nh5 Qd5 27.Nf6 gf6=) 26...Qd5=+ 27.Ne4 Nd7 (27...Be7 28.Nc3 Qb3 29.Rd3–/+) 28.Nf6= Nf6 29.Re1 Exerts pressure on the isolated pawn 29...Kf7 30.Qe5? (30.Qd3 Qf5 31.Qf1 Nd5=+) 30...Qe5 (better 30...Rc2 31.Qd5 Nd5–+) 31.de5=+ Nd5 32.f5 ef5 (32...Rc5!?–+) 33.e6–/+ Kf8 (33...Ke7 34.Bg7 Rc5 35.Bb2–/+) 34.e7 (34.Re5 Ne7=+) 34...Ne7 (34...Kf7!?–/+) 35.Bg7=+ Kg7 Deflection from e7 (35...Kf7 36.Bd4=+) 36.Re7= Kf6 37.Rb7 Ra8 (37...Rc1!? 38.Kf2 Rc2 39.Kf3 Rb2 40.Rb6 Ke5=+) 38.Rb6+= Ke5 (38...Kg5+=) 39.Rc6 (better 39.Ra6!? Rd8 40.Ra5+–) 39...a4 40.Rc2? (better 40.Ra6 Rb8 41.b6=) 40...a3–+ 41.b6?? (better 41.Ra2 Kd5 42.b6–+) 41…a2 (41...a2 42.Rc1 a1Q 43.Ra1 Ra1 44.Kf2 Rb1–+) 0–1. BeepBeepImAJeep (2775) – Macrofago (2750), lichess.org, 2017.

5.a4 e6 6.e3 Be7 7.Nf3 0-0 8.Be2 d5 9.0-0 c6 10.d4 cb5 11.cb5 Nbd7 12.Nbd2 Re8 (12...Rc8 13.Bd3=) 13.Ne5 (13.Rc1 Rc8+=) 13...Bd6 (13...Rc8 14.Bd3=) 14.Ndf3 Qc7 (14...Rc8!?=) 15.Rc1+– Qb8 16.h3 Be5 17.Ne5 Ne5 18.de5 Nd7 19.f4 (19.Bd3 A) 19...Ne5? 20.Bh7 Kh7 21.Qh5 Kg8 22.Be5+– (22.Qe5?! f6 23.Qc7 Qc7 24.Rc7 Rab8+–); B) 19...Nc5+–) 19...Rc8+= 20.Bd4 Rc1 21.Qc1 Qc8 (21...Qd8 22.Bg4+=) 22.Qd2 (22.Qa3 Nc5+=) 22...Qd8 23.Bd3 White prepares the advance f5 23...Rc8 24.f5 g6 25.fe6 fe6 26.Rf6 (better 26.Be2!?+=) 26...Nf6–/+ 27.ef6 Kf7 (27...Qd6 28.Qb2–/+) 28.Qf2 (better 28.Qe1=) 28...Qd6?? (better 28...Rc1 29.Bf1 Qd6–/+) 29.Qh4+– Threatening mate... how? 29...e5 30.Qh7 Kf6 31.Qg6 (31.Qb7? Rc1 32.Kf2 ed4–+) 31...Ke7 32.Qg7 Ke6 33.Qg6?? (better 33.Bb6!? Rc1 34.Kf2+–) 33...Ke7+– 34.Qh7 Ke6?? (better 34...Kd8 35.Qh8 Ke7 36.Qe5 Qe5 37.Be5 Rc1 38.Kf2 Rd1+–) 35.Bf5+– (35.Qb7 Rc1 36.Kf2 ed4–/+) 35...Kf6 36.Qg6 (36.Bb6 Rg8 37.Qg8 Kf5 38.e4 Kf6 39.Be3 Ke7 40.Bg5 Qf6 41.Qg7 Kd6 42.Bf6 de4 43.Qb7 Kc5 44.Qc7 Kd4 45.Qe5 Ke3 46.Qd4 Ke2 47.Bg5 e3 48.Qe3 Kd1 49.Qd2) 36...Ke7 37.Qg7 Ke8 38.Be5 (38.Qb7 Rc1 39.Kf2 ed4=+) 38...Qe7 (38...Rc1 39.Kh2 Qe7 40.Qg6 Kf8+–) 39.Bg6 (39.Qg8 Qf8 40.Qe6 Qe7 41.Bg6 Kf8 42.Bd6 (42.Qb6? Rc1 43.Kf2 Qe5–+) 42...Rc1 43.Kf2 Rc2 44.Bc2 Qd6 45.Qd6 Kg8 46.Qe6 Kg7 47.Qe7 Kg8 48.Qh7 Kf8 49.Bg6 d4 50.Qf7) 39...Kd7 40.Bf5 (better 40.Bd3 Rc1 41.Kf2 Qg7 42.Bg7+–) 40...Ke8 41.Qg8 Qf8 42.Qe6 Qe7 43.Qg6 (43.Bg6 Kf8 44.Bd6 Rc1 45.Kf2 Rc2 46.Bc2 Qd6 47.Qd6 Kg7 48.Qe7 Kg8 49.Qh7 Kf8 50.Bg6 d4 51.Qf7) 43...Kf8 44.Bd6 Rc2 45.Qf6 Ke8 (45...Kg8 46.Qe7 Rc1 47.Kf2 Rf1 48.Kf1 d4 49.Qf8) 1–0. BeepBeepImAJeep (2770) – Psy_ko (2555), lichess.org, 2020.

5.Nc3 c6 6.a4 e6 7.e4 (7.Nf3 Bb4=) 7...c5 (7...cb5!? 8.e5 b4=+) 8.Bd3= Bd6 9.Nf3 e5 (9...Qc7 10.0-0=) 10.Qc2 Nh5 (10...0-0 11.Nd5+=) 11.Ne2 (11.Nd5 0-0+=) 11...Bc7 12.Ne5 (12.0-0 Qf6+=) 12...Qg5= 13.f4 Qg2 14.0-0-0 (14.Rg1 Qh2 15.0-0-0 Be5 16.Be5 Qh4+=) 14...Qh3 (14...f6 15.Rhg1 Qh3 16.Ng4 Bf4 17.e5 fe5 18.Bh7+=) 15.Rdf1 (15.Rhg1=) 15...d6 (better is 15...f6!? 16.Nf3 Nf4 17.Nf4 Bf4=) 16.Nf3+= Nd7 (16...f6 17.Ne1+=) 17.Rhg1 0-0-0? (better is 17...Nhf6+=) 18.Ng5+– Qh2 19.Rh1 Qg2 20.Rfg1 Qf2 21.Rh5 Nf6 (21...f5 22.ef5 (< 22.Bg7 fe4 23.Ne4 Be4 24.Bh8 Bd3 25.Qd3 Rh8+–) 22...Rde8 23.Qd1+–) 22.Bf6 gf6 23.Nf7 (23.Nh7?! f5 24.ef5 Bf3+/–) 23...Rhg8 24.Rgh1 Rde8 25.Rh7 f5 26.Ng5 (26.R7h2 Rg2 27.Rh8 Rgg8 28.Rg8 Rg8+–) 26...Rg5? 27.fg5 fe4 28.Rh8 ed3 29.Re8 Kd7 30.Rh7 Ke8 31.Qd3 (31...Kd8 32.Rh8 Ke7 33.Qg6 Qf1 34.Kc2+–) 1–0. Borrmann,Fritz – Foisor,V, corr, 1975.

5.Nc3 e6 6.Nf3 d5 7.e3 Nbd7 8.d4 dc4 (8...c5 9.cd5 Nd5 10.Be2=) 9.Bc4+= Bb4 10.0-0 0-0 11.Ne1 (11.Rc1 c6+=) 11...c6 12.a4 cb5 13.Nb5 (13.ab5? Rc8 14.Qb3 Qc7 15.Be6 fe6 (15...Bc3 16.Bd7 Bb2 17.Bc8 Ba1 18.Bb7 Qb7 19.Nf3=) 16.Qe6 Kh8–+) 13...Ne4 14.Nc2 (better is 14.Ba3=) 14...Nd2–/+ 15.Nb4 Nc4 (15...Nf1 16.Nd3 Nh2 17.Kh2+=) 16.Nd3 Nb2 (16...Qg5!? 17.Ne1 Nb2–/+) 17.Nb2=+ Nf6 (17...Qg5 18.g3=+) 18.f3 Qe7 (18...Ba6 19.Nc4=) 19.Qb3 (19.Nc4 Nd5 20.e4 Qb4+=) 19...Rac8 20.Rac1 Nd5 21.Nc4 Nb4 (better is 21...Ba6!?=) 22.Nb6+/– Rc1 23.Rc1 Qg5 24.Rf1 (24.Rc5 e5 25.Kh1 Qh4+/–) 24...Bf3?? (better is 24...Bc6 25.Na7 Bd5 26.Nd5 ed5+/–) 25.Rf3+– 1–0. Borrmann,Fritz – Scott, corr, 1978.

5.e3 d5 6.Bf6 (6.Nf3 e6=) 6...ef6 7.cd5 Bd5 8.Nc3 Bb7 9.Nf3 Bb4 10.Be2 0-0 11.0-0 Nd7 12.a3 Bd6 13.Nh4 (13.Nd4 Qe7=) 13...Ne5 (13...c5!?=) 14.d4+/– Ng6 15.Ng6 fg6 16.Bc4 (16.Bf3 Bf3 17.Qf3 Re8+/–) 16...Kh8+= 17.Bd5 (17.Qb3!?+=) 17...Bd5= 18.Nd5 Bh2 19.Kh2 Qd5 20.Qd3 Rfe8 (20...c5 21.bc6 Qc6 22.Rfd1=) 21.f4 (21.Rac1!?=) 21...Re4 22.Rac1 Rd4?? (better is 22...Rae8 23.Rf3 g5=+) 23.ed4+– Qf7 24.d5 (24...Rd8 25.Rcd1+–) 1–0. Trokenheim,Marek – Wartig,Wolfgang, corr SOK–89–41, 1990.

5.e3 e6 6.Nf3 (--> 4.c4 Bb7 5.Nf3 e6 6.e3).

5.e3 g6 6.Nf3 Bg7 7.Be2 0-0 8.0-0 d5 9.Nc3 Nbd7 (9...dc4 10.Bc4 c5 11.bc6 Nc6 12.d4+=) 10.Qc2 (10.Nd5 Nd5 11.Bg7 Kg7 12.cd5 Bd5+=) 10...c6 (10...dc4 11.Bc4 Bf3 12.gf3=) 11.h3 (11.bc6!? Bc6 12.cd5 Nd5 13.Nd5 Bd5 14.Bg7 Kg7 15.d4+=) 11...dc4= 12.bc6 Bc6 13.Bc4 (13.Nd4 Bb7 14.Bc4 Rc8=) 13...Rc8+= 14.Be2 b5 15.Qb1 b4 16.Nd1 Nc5 17.Bd4 Be4 (better is 17...Ne6 18.Bf6 Bf6–/+) 18.Qb2?? (better is 18.d3!? Bd5 19.Nb2=) 18...Nd3 (better is 18...Na4 19.Qb3 Bc2–+) 19.Qb3 (19.Bd3 Bd3 20.Re1 Be4–/+) 19...Nc1–+ 20.Rc1 Rc1 21.d3 Bd5 22.Qb2 Rc6 23.Ne5 Rc8 24.e4 Bb7 25.a3 ba3–+ 26.Qb7 Qd4 27.Nc6 Qc5?? 28.Ne7= Kh8 29.Nc8 Qc8 30.Qb3+= Qc5 31.Nc3 Nd7 32.Nd5 Rb8 33.Qa4 Nb6 34.Nb6 Rb6 35.d4 Bd4–+ 36.Rd1 Bf2 37.Kh1 h5 38.Rd8 Kg7 39.Qe8+= Rb1 40.Kh2?? Qc7 41.e5 Kh6 42.Qh8 Kg5 43.Qf6 Kh6 44.Rh8 1–0. orangutanb4 (1915) – mariano2033 (2125), internet, 2011.

5.Nf3 e6

6.e3 d5 7.Nc3 Nbd7 8.Be2 Bd6 9.0-0 0-0 10.Nd4 Ne4 11.Ne4 de4 12.Bg4 Ne5=+ 13.Qe2 Qh4–/+ 14.h3 f5 15.f4 ef3?? 16.Bf3 Bf3–/+ 17.Nf3 Qc4 18.Rae1 Nd3 19.Bc3 Rad8 20.Nd4–/+ Bc5 21.Rf4?? e5–+ 22.Nf5 ef4 23.Qg4 Qc3! 24.dc3 Rf5 25.Re2?? Rdf8–+ 26.Kh2 Ne5 27.Qh4 f3 28.Re1 fg2 29.Kg2 Rf2! 30.Kh1 Rh2! 31.Kh2 Nf3 32.Kg3 Bd6 33.Kg4 Nh2 34.Kh5 Rf5 (35.Qg5 g6 36.Kh4 Nf3 37.Kg4 h5 38.Qh5 Nh2 39.Kh4 Rh5#) 0–1. Axelsson,JH – Oskarsson,Torsten, Helsingborg S. Allers, 1960.

6.e3 d6 7.d4 Nbd7 8.Nc3 Be7 9.Bd3 Nf8 10.e4 N8d7 11.0-0 Nf8 12.e5 N6d7 13.Re1 c6? 14.Be4 Nb8 15.a4 Nfd7 16.Qd3 Nf8? 17.d5+– ed5 18.cd5 c5 19.e6! f6 20.Re3 Qc7 21.Nd2 Kd8 22.Rh3 h6 23.Re1 Kc8 24.Ree3 Qd8 25.Reg3 g5 26.Nd1 h5 27.Rg5 Qe8?? 28.Ne3 fg5 29.Bh8 Ne6 30.de6 Qh8 31.Bb7 Kb7 32.Qe4 Ka7 33.g4 h4 34.Nd5 Qd8 35.Nc4 Nd7 36.ed7 Qd7 37.Qe7 (37...Qe7 38.Ne7+–) 1–0. Nielsen,Joergen Axel – Ebmeyer,R, corr EU–ch GT42, 1969.

6.e3 d6 7.Be2 Nbd7 8.0-0 Be7 9.d4 Bf3 10.Bf3+/– Rc8 11.Nd2 d5 12.Rc1 h5 13.Qb3 dc4 14.Nc4+– g5 15.Bc6 0-0 16.Rfd1 Bd6 17.Ne5 Qe7 18.f4 gf4 19.ef4 Kh8 20.Kh1 Rg8 21.d5 Be5 22.fe5 Ng4 23.Qf3?? Qh4+= 24.h3 Nf2 25.Kg1?? Nh3–+ 26.Kf1 Rg3 27.Qe2 Nf4 28.Qf2 Rcg8 29.d6=+ Qh1 30.Qg1 Qg1 31.Kg1 Ne2 32.Kf2? Nc1–/+ 33.Rc1 Nc5 34.Rd1 Nd3–+ 35.Ke2?? Nb2 36.Rd4 cd6 37.ed6 Rd3! 38.Rd3 Nd3 39.Kd3 Rd8 40.d7 Kg7 41.Ke4 Kf6 42.Kf4 Ke7 43.Kg5 f6 44.Kh5 Rd7 45.Bd7 Kd7 46.Kg6 Ke7 47.a4? f5 48.g3 Kd6 49.Kf6 Kd5 50.Kg5 Ke4 51.Kf6 e5 52.Ke6 f4 53.gf4 ef4 54.Kd6 f3 55.Kc6 f2 56.Kb6 f1Q 57.Ka5 Qf8 58.b6 Qa8 59.Kb5 Kd5 60.a5 Qb7 61.Kb4 Qa6 62.Ka4 Kc4 (63.Ka3 Qb5 64.Ka2 Kc3 65.a6 Qb2#) 0–1. Cedergaard,Allan – Hjortstam,Kurt, Alingsas Sweden, 1985.

6.e3 Bd6 7.Be2 =.

6.e3 Be7 7.Be2 0-0 8.0-0 d5 (8...Ne4 9.Nc3=) 9.d3 (9.Bf6 Bf6 10.d4 dc4=) 9...c5 10.Nbd2 Nbd7 11.Re1 (11.Qa4 Bd6=) 11...Qc7 12.Rc1 Rfd8 13.a4 dc4 14.dc4 Bd6 15.Bf1 e5 16.e4=+ Nf8 17.g3 Ne6=+ 18.Bd3 Nd4–/+ 19.Nd4 cd4 20.Qb3 Bb4 21.Rc2 Qd7 22.Ba3 Qe6 23.Bb4= ab4 24.Qb4 Nd7 25.Nb3 h5 26.a5+/– ba5 27.Na5 Qb6 28.Nb3 Rab8 29.c5+– Qe6 30.Na5 Ba8 31.c6 (31...Nb6 32.c7+–) 1–0. Tavares,Raimundo A M – Navarro,Marcos S, corr TBI CXEB, 1995.

6.e3 Be7 7.Be2 c5 8.0-0 0-0 9.Nc3 Qc7 10.Qc2 d5 11.d3 Nbd7 12.h3 Rad8 13.Rfd1 Ne8 14.Qb3 d4=+ 15.Ne4 e5 16.Rac1 f5 17.Ned2 Ndf6 18.ed4 ed4 19.Re1 h6 20.Bf1 Nh5 21.Qd1 Nef6 22.g3 Bd6=+ 23.Bg2 Ng4 24.hg4+/– fg4 25.Rf1?? gf3–/+ 26.Nf3 Bg3 27.fg3= Qg3 28.Rc2? Rde8–+ (29.Nh4 Rf4–+) 0–1. Mueller,Klaus Detlef – Schoppmeyer,Herbert, corr ICCF EU–ch GT189, 1981.

4.e3 Bb7

5.Nf3 (--> 1.b4 a5 2.b5 b6 3.Bb2 Bb7 4.e3 Nf6 5.Nf3).

5.f4 e6 6.Nf3 =.

5.f4 g6 6.Nf3 Bg7 7.c4 0-0 8.Nc3 d6 9.Be2 Nbd7 10.0-0+= Ne4 11.Qc2 Ndc5 12.d3 Nc3 13.Bc3 e5 14.fe5+/– de5 15.e4 Qe7 16.Rf2 Rad8= 17.Raf1 Rd6 18.Bd2 Rfd8 19.Ne1 f6 20.Be3+= R6d7 21.Qc1 Rf8 22.Qa3 Ne6 23.Qe7+/– Re7 24.Bg4 Rd8= 25.Rc2 Nd4 26.Bd4 Rd4=+ 27.Be2 Rd8 28.c5 Kf7 29.Nf3 Bh6 30.cb6 Be3–/+ 31.Kh1 cb6 32.g4 Bc8 33.Rc6 (33...Bd7 34.Rd6–/+; 33.g5 Bh3 34.Ne5 Re5 35.Rf6 Kg8=). Valles,Angel – Ruiz,Luis, Oviedo rapid, 1991.

4.Nf3 Bb7

5.e3 (--> 1.b4 a5 2.b5 b6 3.Bb2 Bb7 4.e3 Nf6 5.Nf3).

3.Bb2 c5

4.a4 e6 A) 5.e3 d5 6.d4 (6.Be2 Nbd7 7.f4 Bd6 8.Nf3 0-0 9.0-0 Qc7 10.Qe1 Re8 11.Qg3=; 6.Nf3 Nbd7 7.d4 cd4 8.Bd4 Bd6 9.c4 0-0 10.cd5 Nd5 11.Be2=; 6.Bd3 Bd6 7.Nf3 Nbd7 8.0-0 e5 9.Nh4 e4 10.Be2 0-0 11.d4+=) 6...c4 7.Nf3 Ne4 8.Be2 Bd6 9.0-0 0-0 10.Ba3 Bb4 11.Nfd2=; B) 5.Nf3 d5 6.d4 (6.d3 Nbd7 7.e3 Bd6 8.Be2 e5 9.0-0 0-0 10.e4 de4 11.de4+=; 6.e3 Nbd7 7.d4 Qc7 8.Be2 cd4 9.ed4 Bb4 10.c3 Bd6 11.Ba3=; 6.c4 Bd6 7.e3 0-0 8.Be2 Re8 9.d4 cd4 10.Qd4 e5 11.Qh4=) 6...c4 7.e3 Bb4 8.c3 Bd6 9.Ba3 Ba3 10.Ra3 0-0 11.Be2=.

4.c4 e6 5.e3 d5 6.Nf3 d4 7.ed4 cd4 8.d3 Bb4 9.Nbd2 Bc5 10.Be2 Nbd7 11.0-0 e5 12.a4 0-0 13.Ba3 Qb6 14.Bc5 Qc5 15.Nb3 Qc7 16.Rc1 b6 17.h3 Nc5 18.Nh2 Na4 19.Ng4 Ng4 20.Bg4 f5 21.Bf3 Rb8 22.Bd5 Kh8 23.Na5 Nc3 24.Rc3 dc3 25.Nc6 Ra8 26.Ne5 Ra2 27.Qh5 Qe5 28.f4 Qe3 29.Kh1 Qg3 30.Rg1 c2. fedorstar (1930) – Amun (1935), lichess.org, 2019.

4.bc6 dc6 5.Nf3 e6 =.

4.Nf3 d5 =.

4.a4 b6

5.c4 Bb7 6.e3 e6 7.Nf3 d6 8.Be2 Nbd7 9.0-0 Be7 10.d4 0-0 11.Nc3 e5 12.de5 Ne5 13.Rc1 Ng6 14.Nd2 Rb8 15.Bf3 Qc7 16.Be2 (16.Bb7 Qb7 17.e4 Rfe8+=) 16...d5 17.cd5 Nd5 18.Nd5 Bd5 19.Bf3 Rbd8 20.Bd5 Rd5 21.Qe2 Rfd8 22.Nc4 h6 23.Qf3 Bf8 (23...Bd6 24.Kh1 Be5 25.Ne5 Ne5 26.Qg3=) 24.g3 f6 (24...Be7 25.Rfd1 Rd1 26.Rd1 Rd1 27.Qd1+=) 25.Qe4 Qf7? (better 25...Kf7!?+=) 26.Nb6+– f5 27.Qf3 Rd2 (27...Nh4 28.Qf4 g5 29.Qc4 Nf3 30.Kg2+–) 28.Bc3 (28.Nc4!? Rb2 29.Nb2 Ne5+–) 28...Ra2 29.Ba5 (29.Rcd1 Rb8 30.Ba5 c4+–) 29...Ne5 30.Qg2 Ng4 31.Rfe1?? (31.Qh1 Qe6 32.Qc6 Qf7+–) 31...Qa7?? (better 31...Rf2 32.Qf2 Nf2 33.Kf2 Be7=+) 32.Nc4+– Ra4?? (32...Rd7 33.b6 Qb8+–) 33.Bd8 (33.Bd8 Qf7 34.Nb2+–) 1–0. BeepBeepImAJeep (2430) – mariorton (2055), lichess.org, 2018.

5.e3 Bb7 6.c4 e6 7.Nf3 Qc7 8.Be2 Be7 9.d4 cd4 10.Bd4 d6 11.Nbd2 Nbd7 12.Bb2 Rc8 Attacks the backward pawn on c4 13.Rc1 Nc5 14.0-0 Nce4 (14...0-0 15.Bd4=+) 15.Nd4 (15.Ne4 Be4 16.Bd3 Bb7=) 15...h6 16.Ne4 Ne4 17.Bf3 Ng5 (better 17...Bf6!?=) 18.Bb7+– Qb7 19.Nc6 Bf6 (better 19...Rg8!?+–) 20.Bf6+– gf6 21.Qd6 Rc6?? (21...Ne4 22.Qd4 Nc5 23.Qf6 Rg8+–) 22.bc6 (worse 22.Qc6 Qc6 23.bc6 Ne4+–) 22...Qc8 23.Rcd1 (23.c7!? Ne4 24.Qc6 Ke7+–) 23...Rg8 (23...e5 24.Qf6 0-0+–) 24.c7 (24.c7 Qc7 25.Qc7+–) 1–0. BeepBeepImAJeep (2560) – Photophobia (2430), lichess.org, 2016.

4.a4 d5

5.e3 Nbd7 6.Nf3 (6.f4 e6 7.Nf3 Be7 8.Be2 0-0 9.0-0 Qb6 10.Qe1 Ne4 11.d3=) 6...e6 7.Be2 Bd6 8.d4 cd4 9.ed4 Ne4 10.0-0 0-0 11.Ba3=.

5.e3 e6 6.d4 (6.Be2 Bd6 7.f4 Nbd7 8.Nf3 0-0 9.0-0 Qc7 10.Qe1 Re8 11.Qg3=; 6.Bd3 Bd6 7.Nf3 Nbd7 8.0-0 e5 9.Nh4 0-0 10.Nf5 Bc7 11.f4+=; 6.Nf3 Nbd7 7.Be2 Bd6 8.0-0 e5 9.d3 0-0 10.e4 de4 11.de4+=) 6...c4 7.Nf3 Bb4 8.c3 Bd6 9.Ba3 0-0 10.Be2 Re8 11.Bd6=.

5.e3 Bf5 6.Be2 (6.Nf3 e6 7.Be2 Bd6 8.Nh4 Bg6 9.Nc3 Nbd7 10.f4 Qc7 11.Bf3=; 6.Bf6 ef6 7.Be2 Nd7 8.Nf3 Bd6 9.0-0 0-0 10.Nc3 Nb6 11.Bd3+=) 6...e6 7.Nf3 Bd6 8.Nh4 Bg6 9.f4 Ne4 10.g3 Nf6 11.0-0=.

5.e3 g6 6.c4 Bg7 7.Nf3 0-0 8.Be2 d4 9.ed4 cd4 (better 9...Nh5!?=) 10.Bd4+– (10.Nd4? Ne4 11.Nc6 bc6 12.Bg7 Kg7–+) 10...Re8 11.0-0 Nbd7 12.Bb2 e5 13.d4 e4 The passed pawn on d4 will become decisive later 14.Ne5 (14.Nfd2 Qc7+–) 14...Qe7 (better 14...Ne5!? 15.de5 Nd7+=) 15.Nd7+– Bd7 16.Bc1 Bf5 17.Be3 h5 18.h3 Rad8 19.Nc3 Qd7 20.Kh2 (20.d5 Qc7+–) 20...Bf8 (20...Nh7+=) 21.c5 (21.Qe1 Bg7+–) 21...Bg7?? (better 21...Bc5 22.dc5 Qc7 23.Kg1 Rd1 24.Rad1 Rd8=) 22.Rc1 Nd5 23.Nd5 Qd5 24.Bc4 Qd7 25.Qb3 (better 25.d5!?+–) 25...Qc7 26.Kh1 Qd7? (26...Bd4!? 27.b6 Qe7+–) 27.h4 (27.Rfd1!? Bf6+–) 27...Qe7 28.Bg5 Bf6 29.Bf6 (29.Rfd1 Rd7 30.Qe3 Rc8+–) 29...Qf6+– 30.g3 (better 30.Rfd1!?+–) 30...Bg4 (30...Qd4? 31.Bf7 Kg7 32.Be8 Re8 33.c6+–; 30...Rd4?! 31.Kg1=) 31.Rce1 (31.d5!? Bh3 32.Rg1 Qf2 33.Rc2+=) 31...Bf3 32.Kh2 Qf5?? (32...Rd4 33.Be2 Rc8 34.Bf3 ef3 35.Kg1 Rh4 36.Re3=+) 33.Re3?? (33.d5 Qf6+–) 33...Rf8?? (better 33...Rd4 34.c6 bc6 35.bc6 Qf6=) 34.d5+– White prepares c6 34...Kg7 (34...Rc8 35.c6+–) 35.c6 (35.Qc3 f6+–) 35...bc6 36.bc6 The passed pawn on c6 quickly leads to threats (36.Qc3 Kh7 37.dc6 Qc5+–) 36...Kh7 37.Qc3 Qg4 (37...Rd5 38.Bd5 Qd5 39.Rc1+–) 38.Qe5 Rde8 (38...Qc8 39.Rc1+–) 39.Qg5 Qg5 40.hg5 Kg7 (40...Rd8 41.Rb1 Rd6 42.Rb5+–) 41.d6 (better 41.Rb1+–) 41...Rh8 (41...Re5+–) 42.d7 Re5 (42...Ra8+–) 43.c7 h4 (43...Ree8 44.de8R Re8 45.Bd5+–) 44.g4!! Rg5 (44...Bg4 45.d8Q) 45.d8Q Rg4 46.Qh8! Kh8 Decoy to h8 47.c8Q Kg7 48.Qg4 (48.Rf3 ef3 49.Qg4 h3 50.Qh4 f6 51.Re1 g5 52.Re7 Kf8 53.Rf7 Ke8 54.Qh8) 48...Bg4 49.Re4 f5 50.Rg4 (better 50.Re5 f4 51.Ra5+–) 50...Kh6 (50...fg4 51.Rg1 g3 52.fg3 hg3 53.Kg3+–) 51.Rfg1 (51.Rh4 Kg5 52.Kg3 Kf6 53.Re1 g5 54.Rh7 g4 55.Kf4 Kg6 56.Reh1 g3 57.R1h6) 51...fg4 52.Rg4 Kh5 53.Kh3 g5 54.f4 gf4 55.Rf4 Kg5 56.Rh4 Kf5 57.Rh5 Ke4 58.Ra5 Kd4 59.Bf1 Kc3 60.Rb5 Kd4 61.a5 Kc3 (61...Ke4 62.a6 Kd4 63.a7 Ke3 64.a8Q Kf4 65.Qe8 Kf3 66.Rf5) 62.a6 (62.a6 Kc2 63.a7 Kc1 64.a8Q Kd2 65.Qg2 Kc1 66.Qa2 Kd1 67.Rb1) 1–0. BeepBeepImAJeep (2545) – lamorocha (2280), lichess.org, 2018.

5.Nf3 A) 5...Bf5 6.e3 (6.Bf6 ef6 7.e3 Bd6 8.Nc3 Be6 9.Be2 0-0 10.d4 c4 11.0-0=; 6.Nh4 Bg4 7.h3 Bc8 8.Nf3 e6 9.e3 Nbd7 10.Be2 Bd6 11.d4=; 6.h3 Nbd7 7.e3 e6 8.Nh4 Bg6 9.Ng6 hg6 10.c4 Bd6 11.Be2=) 6...e6 7.Be2 Bd6 8.Nh4 Be4 9.d3 Bg6 10.f4 Nbd7 11.Ng6=; B) 5...e6 6.c4 (6.d4 c4 7.e3 Bb4 8.c3 Bd6 9.Ba3 0-0 10.Be2 Re8 11.Bd6=; 6.e3 Bd6 7.Be2 0-0 8.0-0 Nbd7 9.d4 cd4 10.ed4 Re8 11.Re1=; 6.d3 Nbd7 7.e3 Bd6 8.Be2 e5 9.0-0 0-0 10.e4 de4 11.de4+=) 6...Bd6 7.d4 0-0 8.cd5 ed5 9.dc5 Bc5 10.e3 Bb4 11.Bc3=; C) 5...Bg4 6.Ne5 Bf5 7.e3 Nbd7 8.g4 Be4 9.f3 Ne5 10.Be5 Bg6 11.h4=.

4.a4 d6

5.e3 A) 5...e5 6.Be2 (6.d4 cd4 7.ed4 e4 8.d5 Be7 9.Ne2 0-0 10.Ng3 Re8 11.Qd4=; 6.c4 Nbd7 7.Be2 Be7 8.d3 d5 9.cd5 Nd5 10.Nf3 f6 11.0-0=; 6.f4 ef4 7.ef4 Be7 8.Nf3 0-0 9.Bc4 d5 10.Be2 Nh5 11.g3+=) 6...Be7 7.d3 0-0 8.Nf3 Bg4 9.0-0 Nbd7 10.c4 Re8 11.Nc3=; B) 5...h6= 6.d4 (6.Be2 e5 7.d4 Nbd7 8.Nf3 cd4 9.ed4 e4 10.Nfd2 d5 11.c4=; 6.Bf6 gf6 7.Nf3 e5 8.d4 cd4 9.ed4 d5 10.Qe2 e4 11.Nfd2=; 6.c4 e5 7.d4 cd4 8.ed4 e4 9.d5 Nbd7 10.f3 Nc5 11.fe4+=) 6...cd4 7.ed4 d5 8.Bd3 e6 9.Ba3 Ba3 10.Ra3 Qd6 11.Nf3+=; C) 5...Nbd7 6.d4 (6.Be2 e5 7.d4 Be7 8.de5 de5 9.Nf3 Qc7 10.Nc3 Nb6 11.e4+=; 6.Nf3 e5 7.Be2 e4 8.Ng5 d5 9.d3 h6 10.Nh3 Nb6 11.Nf4=; 6.Nc3 d5 7.d4 cd4 8.ed4 Qc7 9.Bd3 e6 10.Nge2 Bb4 11.0-0+=) 6...e5 7.de5 de5 8.Nd2 Bd6 9.Ngf3 Qe7 10.Bd3 0-0 11.Nh4=.

5.f4 Nbd7 (5...Bf5 6.e3 (6.Nf3 e6 7.e3 Be7 8.Be2 0-0 9.0-0 Nd5 10.Nc3 Nc3 11.Bc3=; 6.Bf6 ef6 7.Nf3 d5 8.e3 Be7 9.Bd3 Bd3 10.cd3 f5 11.Qc2=; 6.d3 d5 7.e3 e6 8.Nf3 Be7 9.Be2 Ng4 10.Qd2 0-0 11.0-0=) 6...e6 7.Ne2 d5 8.Ng3 Bg4 9.Be2 Be2 10.Qe2 Bd6 11.Nh5+=; 5...d5 6.e3 (6.Nf3 Bf5 7.e3 e6 8.Be2 Be7 9.0-0 h6 10.Nh4 Bh7 11.d3= ; 6.Bf6 ef6 7.e3 Bd6 8.Qf3 Be7 9.Nc3 d4 10.Nd5 0-0 11.Bc4= ) 6...Bf5 7.Nf3 e6 8.Be2 Be7 9.0-0 0-0 10.Nh4 Re8 11.Nf5= ; 5...e6 6.e3 (6.Nf3 Be7 7.e3 0-0 8.Be2 b6 9.0-0 Bb7 10.Nc3 d5 11.Qe1= ) 6...Be7 7.Nf3 0-0 8.Be2 Nd5 9.c4 Bf6 10.Qb3 Nb4 11.0-0= ) 6.Nf3 (6.e3 e5 7.Nh3 Nb6 8.Qf3 Qe7 9.Nf2 e4 10.Bf6 ef3 11.Be7=; 6.Nh3 e5 7.e3 Nb6 8.Qf3 Qe7 9.Nf2 e4 10.Qg3 d5 11.Be2=; 6.Nc3 d5 7.e3 e5 8.fe5 Ne5 9.Nf3 Nf3 10.Qf3 Bg4 11.Qf2+=) 6...b6 (6...e5 7.fe5 de5 8.Ne5 (8.e4= Ne4 9.Qe2 Nd6 10.Ne5 Ne5 11.Qe5=) 8...Ne5 9.Be5 Ng4 10.Bg3 Bd6 11.Ra3=; 6...Qc7 7.e3 e5 8.Be2 ef4 9.ef4 d5 10.f5 Bd6 11.d4+=) 7.e3 Bb7 (7...e6 8.Bd3 Be7 9.0-0 0-0 10.Nc3 Qc7 11.Be2=) 8.Be2 (8.Bc4 e6 9.0-0 Be7 10.Nc3 d5 11.Be2=) 8...g6 (8...e6 9.0-0 Be7 10.Qe1 0-0 11.Nc3=) 9.0-0 Bg7 10.c4 (10.d3 d5 11.Ne5=) 10...e6 (10...0-0 11.Nc3=) 11.Ra3 (11.d3=) 11...Qe7 12.d4 0-0 13.Nc3 (13.Nbd2 Rac8=) 13...Rac8 14.Bd3 (14.Ra1 Rfd8+=) 14...Rfd8 (14...Ng4!? 15.Qe1 Bf3 16.Rf3 cd4 17.ed4 Bd4 18.Kh1 Rfe8–+) 15.Qe2=/+ Qf8 (better is 15...Ng4 16.Ne4 d5+=) 16.e4? (better is 16.Rb3!?=) 16...cd4–/+ 17.Nd4 Nc5 (17...d5 18.Nc6 Bc6 19.bc6 de4 20.Ne4 Rc6–/+) 18.f5? (better is 18.Bc2!?+=) 18...ef5–+ 19.ef5 Re8 20.Qc2 Qe7 21.Nd1–/+ Nd3 22.Qd3 Be4 23.Qh3 Rc4 24.fg6 fg6–/+ 25.Re3? Nd5–+ 26.Nc6 Rc6 27.bc6 Bb2 28.Nb2 Ne3 29.Qe3 Bc6 30.Qb6 Qe3 31.Qe3 Re3 32.Nc4 Re2 33.Rf2 Re1 34.Rf1 Rf1 35.Kf1 Ba4 36.Ke2??Bc2 37.Na5–/+ Kf7 38.Ke3 Ke6 39.Kd4 d5 40.Nc6 Be4 41.g3 Kf5 42.Ke3 Kg4–+ 43.Kf2 Kh3 44.Kg1 h6 45.Nd4 h5 46.Nc6 Kg4 47.Kf2 Kh3 48.Kg1 h4 49.gh4 Kh4 50.Kf2 Kh3 51.Kg1 Kg4 52.Kf2 Kf4 53.Nd4 Bd3 54.Nc6 Ke4 55.Kg3? Be2 56.Kf2 Bh5 57.Nb4 d4 58.Ke1 Ke3 59.Nd5 Kd3 60.Nb4 Kc3 61.Na2?? Kb3 62.Nc1 Kc2 63.Na2 Bf3 64.Nb4 Kc3 65.Na2 Kb3 66.Nc1 Kc2 67.Na2 d3 68.Nb4 Kc3 69.Na2 Kb3 70.Kd2 Ka2 71.Kd3 Kb3 72.h4 Bh5 73.Ke3 Kc3 74.Kf4 Kd4 75.Kg3 Ke3 76.Kg2 Kf4 77.Kf2 Kg4 78.Ke3 Kh4 79.Kd2 g5 80.Ke1 g4 81.Kf2 g3 82.Kg1 Kh3 83.Kh1 Bg6 84.Kg1 g2 85.Kf2 Kh2 86.Ke1 g1Q 87.Ke2 Qd4 88.Kf1 Qe5 89.Kf2 Bh5 90.Kf1 Qe2 0–1. Schoppmeyer,Herbert – Groenegress,Wilfried, OWL–ch Rheda, 1961.

5.Bf6 A) 5...gf6 6.g3 (6.Nf3 d5 7.e3 e5 8.d4 e4 9.Nfd2 cd4 10.ed4 Qb6 11.Nb3=; 6.Nc3 Bg7 7.g3 Rg8 8.Bg2 f5 9.Nh3 e6 10.Nf4 d5 11.Nh5=; 6.e3 d5 7.c4 dc4 8.Bc4 Rg8 9.Qh5 Rg7 10.d3 Nd7 11.Nf3=) 6...Bg7 7.Bg2 f5 8.c3 e5 9.Nh3 d5 10.f4 e4 11.d3=; B) 5...ef6 6.Nf3 (6.Nc3 d5 7.e4 de4 8.Ne4 Be7 9.Bc4 0-0 10.Nf3 Nd7 11.0-0=; 6.e3 d5 7.Nf3 Bd6 8.d4 c4 9.Be2 0-0 10.0-0 Re8 11.Nc3=; 6.d4 d5 7.e3 c4 8.Nf3 Bb4 9.c3 Bd6 10.e4 Qe7 11.Qe2=) 6...Be6 7.e3 d5 8.Be2 Bd6 9.0-0 0-0 10.d4 c4 11.Nbd2=.

4.c4 b6

5.e3 Bb7 6.Nf3 e6 7.Be2 d5 8.cd5 Nd5 (8...ed5!? 9.0-0 Bd6=) 9.Nc3 Nd7 10.Nd5 Bd5 11.Qc2 Qc7 12.e4 Bb7 13.0-0 0-0-0 (13...Nf6!? 14.Bd3 Be7+=) 14.Rfc1 Bd6 15.d4 (15.g3!?+–) 15...Bf4+= 16.Nd2 (16.g3!? Bc1 17.Rc1=) 16...Bh2=+ 17.Kf1 Bf4 18.e5 (18.g3 Bg5=+) 18...Kb8 (18...h5 19.Ne4 Kb8 20.Nd6 Bc1 21.Rc1=+) 19.g3 Bg5 20.f4 (better 20.Rd1!?–/+) 20...Be7–+ 21.Ne4 Ne5?? (better 21...h5 22.dc5 Nc5 23.Nc5 bc5–+) 22.fe5 f5 23.Nd6 (better 23.Nc5!? bc5 24.dc5+=) 23...Bd6= 24.ed6 Qd6 25.dc5 Qg3 26.c6 (26.cb6?? Bg2 27.Kg1 Bh3 28.Kh1 Qg2) 26...f4?? (better 26...Qh3 27.Kf2 Qh2 28.Kf3 Qh3 29.Kf2 Qh2 30.Kf1 Qh3 31.Kg1 Qg3 32.Kh1 Qh3 33.Kg1 Qg3 34.Kh1 Qh3 35.Kg1=) 27.c7 (better 27.Qc3 f3 28.Bf3+–) 27...Ka7–+ 28.cd8Q (28.Bc4 Qh3 29.Ke1 Qh1 30.Kf2 Qh2 31.Ke1 Qg1 32.Bf1 Qg3 33.Qf2 Qf2 34.Kf2 Rd2 35.Kg1 Rb2 36.Bh3–+) 28...Bg2 (28...Rd8?! 29.Bc4 (29.Qh7?? Bg2 30.Kg1 Bh3 31.Kh1 Qg2) 29...Qh3 30.Ke1 Qe3 31.Qe2 Qg1 32.Qf1 Qe3 33.Qe2 Qg1 34.Qf1 Qe3 35.Qe2=) 29.Kg1 Rd8 (29...Rd8 30.Bf1 Be4 31.Bg2 Bc2 32.Rc2 f3–+; 29...Bh3 30.Kh1 Qg2) 0–1. GuestCNQL – GuestTFQQ, freechess.org, 2017.

5.e3 e6 6.Nf3 d5 7.Be2 Nbd7 8.0-0 Bd6 9.Nc3 Bb7 10.d3 0-0 11.Qc2 Qc7 12.cd5 ed5 13.d4 c4 14.h3 Rfe8 15.Rac1 Nf8 16.a4 Ng6 17.Rfd1 Rad8 18.Bf1 Bc8 19.g3 Be6 20.Bg2 Qc8 21.Ng5 Bf5 22.e4 de4 23.Nce4 Ne4 24.Ne4 (24.Be4 Be4 25.Ne4 Qh3 26.Nd6 A) 26...Rd6?! 27.Re1 (27.Qc4 Nh4 28.Qf7 Kf7 29.Rc7 Kf8 30.Rf7 Kf7 31.gh4 Rg6) 27...Re1 28.Re1–/+; B) 26...Nh4 27.gh4 Rd6–+) 24...Qd7 25.g4 Be4 26.Be4 Nf4 27.Kf1 Qe7 28.Re1 Qh4 29.Re3 Nh3 (29...Nh3 30.Bg2 Nf4–+) 0–1. Naasen,Nils (1915) – Tessieri,Franco, IECG, 2004.

5.Bf6 gf6 6.Nc3 f5 (6...Bg7 7.Nf3=) 7.Nf3 Bg7 8.Rc1 (8.Qc2 d6=) 8...Bb7 9.Qc2 e6 10.g3 d5 (10...Bf3!? 11.ef3 0-0=) 11.cd5+= Bd5 12.Nd5 Qd5 13.Bg2 Ra7 14.0-0 (14.h3 Qd7+/–) 14...0-0 15.Rfd1 Qd8 (15...Qd6 16.d3+=) 16.a4 Rd7 17.d3 Qe7 18.Nd2 Rd4 19.Nc4 Qc7 (19...Nd7 20.Bc6 Rb8 21.e3+/–) 20.e3 Rg4 21.f4 (21.h3 Rg5+/–) 21...Rd8+= 22.Bf3 Rg6 23.Qg2 e5 (23...Rd7 24.Qc2+=) 24.Kh1 ef4+= 25.ef4 Rd4 26.Qf1 Nd7 27.Re1 Nf8 28.Re3 Ne6 29.Rce1 Rd8 30.Bc6 Bc3 31.Ne5 Be1=+ 32.Re1 Nd4 33.Ng6 hg6 34.Bg2 Qd6 35.Re5 Ne6 36.Bd5 Nd4 37.Bc4 Kg7=+ 38.h4 Rd7 39.Qf2 Re7 40.Re7 Qe7 41.Kg2 Qb7 42.Kg1 Qe7 43.Kf1 Qe8 44.Qe1 Qe1 45.Ke1= f6 46.Kf2 g5 47.hg5 fg5=+ 48.Bd5 Kg6 49.Bf3 Kf6 50.fg5 Kg5 51.Bd1 f4 52.gf4 Kf4 53.Bh5 Ke5 54.Ke3 Nf5 55.Kd2 Kd4 56.Bf7 Ne3 57.Bg8 Ng2 58.Bf7 Nf4 59.Bc4 Ng6 60.Bb3 Ne5–/+ 61.Bc2 Nf3 62.Ke2 Ne5 63.Kd2 c4 64.dc4= Nc4 65.Kc1 Kc3 66.Bd1 Ne3 67.Be2 Nf5 68.Bg4 Nd6 69.Bf3 Nc4 70.Be2 Nb2=+ 71.Kb1 Na4–/+ (72.Kc1 Nc5–+) 0–1. Melich,Jindrich (2190) – Illetsko,Jaroslav (2240), CZE–chT1b Czechia, 1995.

4.c4 d5

5.cd5 Nd5 6.e4 =.

5.e3 d4 6.ed4+= cd4 7.Nf3 Bg4 8.d3 (better 8.h3!? Bh5 9.g4+–) 8...e5= 9.Be2 Bb4 10.Nbd2 Bf3 (10...Qe7 11.a3 Bd6 12.0-0=) 11.Bf3 Nbd7 (better 11...Qc7!?=) 12.Bb7+– 0-0? (better 12...Rb8 13.Bc6 0-0+–) 13.Ba8+– Qa8 14.0-0 Nc5 Black intends e4 15.Nf3 Re8 Black plans e4 16.a3 Bc3 17.Bc3 dc3 18.Rc1 e4 19.de4 (19.Ne1 ed3 20.Nd3 Nce4+–) 19...Nfe4 20.Qd5 Qc8 21.Nd4 (21.Ne5 Qc7 22.Nc6 Nb3+–) 21...Rd8 (21...Nd3 22.Rc2 Nf6 23.Qc6+–) 22.Qc6 Qg4 (22...Qb8 23.Nf5 Re8 24.Rfd1+–) 23.f3 (23.f3 Qg5 24.Rfe1+– (24.fe4?! Qe3 25.Kh1 Ne4+–)) 1–0. BeepBeepImAJeep (2705) – napolinicolo (2485), lichess.org, 2020.

4.c4 g6

5.Nf3 Bg7= 6.g3 d5 (6...0-0 7.Bg2=) 7.cd5 Qd5 8.Bg2 0-0 9.0-0 Ne4 (9...Qh5!?=) 10.Bg7+= Kg7 11.a4 (11.Qc2 Qe6+=) 11...Bg4 12.Qc2 Nd7 13.Nh4 (13.Ne1 Be2 14.Be4 Qd4+/–) 13...f5 (13...Be2!? 14.Be4 Qd4+/–) 14.Qb2+– Ndf6 (14...Qe5!? 15.Qe5 Ne5+–) 15.f3 Qd4 16.Qd4 cd4 17.fg4 Ng4 18.Nf3 Rad8 (18...e5 19.h3 Ngf6 20.Ne5 Ng3 21.Bb7+–) 19.Na3 Nc5 (19...b6 20.Rac1+–) 20.Nc4 (20...d3 21.ed3 Rd3 22.Rae1+–) 1–0. Gattuso – Wartig,Wolfgang, corr 3GMM–42, 1996.

5.Bf6 ef6 6.Nc3 Bg7 +=.

4.e3 b6

5.c4 Bb7 6.Nf3 e6 7.a4 d5 8.Be2 dc4 9.Bc4 (9.Na3 Be7=) 9...Nbd7 10.0-0 Qc7 11.Be2 Bd6 12.h3 h6 13.d4 cd4 14.Nd4 Rg8 (14...Rd8 15.Nd2=) 15.Bf3 Ne5 (15...Bh2 16.Kh1 Be5 17.Nd2+=) 16.Bb7+– Qb7 17.Nd2 Bc5 (17...Rc8 18.Qe2+=) 18.N2f3 (better 18.Ne6!? fe6 19.Be5+–) 18...Nf3+= 19.Qf3 Qf3 20.Nf3 g5?? (better 20...Nd5=) 21.Bf6+– g4 22.hg4 Rg4 23.Ne5 Rg6 (23...Re4 24.Rfc1+–) 24.Ng6 fg6 25.Rfd1 (25.Rfd1 Kf7 26.Bd4+–) 1–0. BeepBeepImAJeep (2665) – ChristopherWalken (2165), lichess.org, 2017.

5.Nf3 Bb7 6.c4 g6 7.Bf6 ef6 8.Nc3 (8.Be2 Bg7+=) 8...f5 9.g3 (9.Be2 Bg7+=) 9...Bg7 10.Rc1 (10.Bg2 Qc7+=) 10...0-0 (10...h6 11.Bg2+=) 11.Bg2+= d6 12.0-0 Nd7 13.Nh4 Bg2 (13...Qb8 14.d4+=) 14.Ng2 Nf6 (14...Re8 15.Nd5+=) 15.Nf4 Re8 16.Nfd5 Nd7 17.f4 Bc3 18.Rc3 Nf6 19.Rd3 Ne4 (19...Nd5 20.Rd5 Re4 21.Qe2+=) 20.Qf3 h5 (20...Kg7 21.h3+=) 21.Nc3 (21.a3 Ra7+=) 21...Nf6 (21...Qf6 22.Rc1+=) 22.Rd1 Ra7 23.Nd5 (23.Qc6 Re6 24.Nd5 Nd5 25.Rd5 Qc7+=) 23...Nd5 (23...Re4 24.Rc1+=) 24.Rd5 (24.Qd5 Re6+=) 24...Rae7 25.Kf2 (25.a3 Re4 26.Rc1 Qf6+=) 25...Qc7 (25...Re4 26.Qe2=) 26.Re1 (26.Kg2 Re6+=) 26...Re6 (26...Re4 27.Qe2+=) 27.d3 (27.Kg2 Qe7+=) 27...Qe7= 28.e4 (28.Kg2 h4= (worse 28...Re3 29.Re3 Qe3 30.Qe3 Re3 31.Rd6 Re2 32.Kh3+–)) 28...fe4=+ 29.de4 Re4 30.Re4 Qe4 31.Qe4 Re4 32.Rd6 Rc4 33.Rb6 Rc2 34.Ke3 (34.Kg1 Ra2 35.Rc6 a4 36.Rc5 Rb2 37.Rc8 Kg7=+) 34...Ra2 (34...Rh2 35.Rc6 Ra2 36.Rc5 Ra3 37.Kf2–/+) 35.Kd3 Rb2 (35...Rh2 36.Ra6=+) 36.Kc4 Rh2 37.Ra6 Rg2 (37...Rc2 38.Kd3 Rc1 39.b6=+) 38.Kc5 (38.b6!? Kg7 39.Ra5 (39.Kc5?! Rg3 40.b7 Rc3 41.Kb6 Rb3 42.Ka7 Rb7 43.Kb7 a4+–) 39...Rc2 40.Kb3+–) 38...Rg3= 39.Ra5 (39.b6 Rc3 40.Kb5 Rb3 41.Kc6 Rc3 42.Kd6 Rd3 43.Kc7 Rc3 44.Kb8 h4 45.Ra5 Rf3+–) 39...Rc3 40.Kb4 Rf3 (better 40...Rc8!?=) 41.b6+– Rf4 42.Kb5 Rf1 (42...Rf5 43.Ka6 Rf6 44.Ka7+–) 43.b7 Rb1 44.Kc6 Rb7 45.Kb7 Kg7 46.Kc6 Kf6 47.Kd5 Kf5 (47...g5 48.Ke4 Kg6 49.Ra6 f6 50.Rc6+–) 48.Kd4 (48.Ra7 h4+–) 48...Kf4 49.Kd3 (49.Ra7 f6+–) 49...Kf3 (49...h4 50.Ra4 Kg3 51.Ke2=) 50.Kd2 (50.Ra7!? f5 51.Kd4+=) 50...f5 (50...h4 51.Ke1+=) 51.Ra3 Kg2 (51...Kg4 52.Ke3 g5 53.Ra1+=) 52.Ke3 g5 (52...h4+=) 53.Ra5= f4?? (better 53...h4=) 54.Ke4+– g4 55.Kf4 (55.Rh5?! f3 56.Rg5 f2 57.Rg4 Kh3=) 55...Kh3 (55...g3 56.Ra2 Kh3 57.Kf3+–) 56.Rh5 Kg2 57.Kg4 (57.Kg4 Kf2 58.Re5 Kg2 59.Rf5 Kh2 60.Kf3 Kg1 61.Rh5 Kf1 62.Rh1) 1–0. FeegLood (2815) – hiimgosu, lichess.org, 2015.

4.e3 e6

5.c4 d5 (--> 1.b4 a5 2.b5 d5 3.Bb2 c5 4.e3 e6 5.c4 Nf6).

5.f4 d5 (--> 1.b4 a5 2.b5 d5 3.Bb2 c5 4.e3 e6 5.f4 Nf6).

3.Bb2 c6

4.c4 (--> 3.c4 c6 4.Bb2).

4.bc6 bc6 5.e3 Qb6 (5...d5 6.Nf3=) 6.Qc1 (6.Bf6 ef6 7.Nf3 Bb4=) 6...d5 7.Nf3 Bg4 8.Be2 Nbd7 9.Bd4 c5 10.Bb2 (10.Bc3 e6=) 10...Rb8 11.Bc3? (11.Bf6 Qf6 12.Nc3+=) 11...g6?? (better is 11...Bf3 12.Bf3 d4–+) 12.d3 (12.Qa3 e5 13.d3 e4 14.de4 de4=) 12...Bg7 (12...Bf3 13.Bf3 d4 14.Bd2+=) 13.Nbd2 0-0 14.0-0 d4 15.ed4 Nd5–/+ 16.dc5? Nc3–+ 17.cb6 Ne2 18.Kh1 Nc1 19.Rac1 Bf3 20.Nf3 Nb6 21.c4 Na4 22.Rfd1? Rb2 23.c5 Rc8 24.d4 Rf2 25.d5 Bh6 26.Rc4 Nb2 27.Rb1 Nc4 0–1. Fournier,Frederic (1735) – nicolo2007 (1835), Active, 2006.

4.bc6 dc6 5.Nf3 Bg4 6.d3 Qb6 7.Qc1 Nbd7 8.Nbd2 Bh5 9.g3 g6 (9...Qc7 10.Bg2=) 10.Bg2 Bh6 11.e3 0-0 12.Rb1 Qc7 13.h3 Bf3 14.Nf3 Nd5 15.0-0 N7f6 (15...N5f6 16.c4+=) 16.a3 Nh5? (better is 16...Nd7+/–) 17.g4+– Ng3 18.Re1 Ne3 (18...f6 19.c4 Ne3 20.fe3+– (20.Re3?! Ne2 21.Re2 Bc1 22.Rc1 Rae8+=; worse is 20.fg3 Ng2 21.Qh6 Qg3–+)) 19.fe3 (better is 19.Be5 Qe5 20.Ne5 Ng4+–) 19...f6 20.Kf2 e5 21.Kg3 e4 22.Kf2 ef3 23.Bf3 Qh2 24.Bg2 Bg5 25.Rh1 Bh4 26.Kf1 Qg3 27.Qe1! Qe1 28.Re1 Be1 29.Ke1 f5 30.Rf1 fg4 31.Rf8 Rf8 32.hg4 h5 33.gh5 gh5 34.Bc3 a4 35.Be5 h4 36.Bf4 Kh7? 37.Be4 Kg7 38.Kf2 Kf6 39.Kg2 Rh8 40.Kh3 Ke6 41.c4 Rg8 42.d4 Rg1 43.d5 Kd7 44.Bf5 Ke8 45.d6 b5 46.cb5 cb5 47.d7 Kd8 48.Bd6 Rh1 49.Kg2 Rd1 50.Bb4 Rd5 51.Ba5 Ke7 52.d8Q Rd8 53.Bd8 Kd8 54.Be6 Ke7 55.Bd5 Kd6 56.Kh3?? Kc5 57.Kh4 b4 58.ab4?? Kb4 59.Kg5 Kc5 60.Kf6 Kd6 61.Ba2 1–0. Shishkin,Va (1880) – Mushak,Alexandr, Petrovskaya Ladya Open, Peterhof RUS, 2008.

4.e3 a4 5.a3 g6 (5...d6 6.c4=) 6.Nf3 Bg7 7.Be2 cb5 (7...0-0 8.Nc3=) 8.Bb5+= Ra5 (8...0-0 9.Nc3+=) 9.c4+– 0-0 10.Ba4 Qc7 11.Bb3 Nc6 12.Bc3 Rh5 13.0-0 Qh2?? (better 13...d6+–) 14.Nh2+– Rh2 (14...d6 15.Re1+–) 15.Kh2 Ne4 16.f4 (16.Bg7 Kg7 17.d4 d6+–) 16...f6 17.d3 Nc3 18.Nc3 f5 19.d4 d6 20.Nd5 (20.c5 Kh8 21.cd6 ed6+–) 20...e6 21.Nb6 e5 22.Rc1 White prepares the advance c5 22...ed4 23.c5 Kh8 24.Nc8 (24.ed4!? Rd8+–) 24...Rc8 25.cd6 de3 26.Re1 Nd4 27.Rc8 (27.Rc8 Bf8 28.Qd4) 1–0. Akrapovik – UriCookie, lichess.org, 2018.

4.e3 d5 5.Nf3=.

4.e3 e6 5.f4 a4 6.Nf3 a3 7.Bf6 Qf6 8.Nc3 Bb4 9.Ne4 Qe7 10.c3 Ba5 11.Bd3 d5 12.Ng3 c5 13.0-0 b6 14.Ne5 h6? (better is 14...0-0) 15.Nh5 0-0 16.Rf3 c4 17.Rg3 cd3 18.Rg7 Kh8 19.Qg4 Nd7 20.Rh7 Kh7 21.Qg7 1–0. Wall,Bill – Guest239458, playchess.com, 2012.

4.a4 cb5

5.ab5 Qb6 6.c4 d5 7.e3 Bf5 8.Nf3 Bb1 (8...Nbd7 9.Nc3 dc4 10.Bc4=) 9.Qb1 Nbd7 10.Be2 dc4 11.Bc4 e6 12.0-0 Bb4?? (12...a4 13.d3+=) 13.Bd4 (better 13.Bf6 Nf6 14.Qb4+–) 13...Bc5 14.Qb2 (14.Bf6 Nf6 15.d4 Be7+=) 14...0-0 15.Rfc1 Rad8 (15...Bd4 16.Nd4 a4 17.Nf3=) 16.Qb3 (16.Bc3!? Ra8 17.Ra4+–) 16...Bd4= 17.Nd4 Nc5 (17...Ra8 18.Nf3=) 18.Qa2 e5 (18...Ra8 19.Nf3+=) 19.Nf5 (19.Nf3 e4 20.Ne5 Ne6+–) 19...Nce4 The backward pawn on d2 becomes a target (19...e4 20.f3+=) 20.d3+– Nd6 (20...Nc5 21.d4 ed4 22.ed4+–) 21.Nd6 Qd6 22.e4 (22.Qa5 e4 23.de4 Ne4+–) 22...Qd4 (better 22...b6!?=) 23.Qa5+– Rc8 (23...Nh5 24.Qd2+–) 24.Qa2 (better 24.Qa7 Qd7 25.Qb6+–) 24...Ng4? (24...Rc7 25.Qa7 Qd6 26.Qa3+–) 25.Rf1 (better 25.Bf7 Kh8 26.Rc8 Rc8 27.Be6 Nf2 28.Bc8 Ng4 29.Kf1 Qd3 30.Qe2 Nh2 31.Kf2 Qd4 32.Kg3 Qa1 33.Kh2+–) 25...Rfd8?? (25...Nf6 26.Qe2+–) 26.h3 (better 26.Bf7 Kh8 27.Be6+–) 26...Nf6 (26...Nh6 27.Qa7 b6 28.Ra6+–) 27.Bf7+– Kh8 28.Bc4 Ne4 29.Rfc1 (better 29.de4!? Qc4 30.Qc4 Rc4 31.Ra7+–) 29...Nd6+= 30.Be6 Rc1 (30...Rc1 31.Rc1 Qd3=). KLINGON09 (1900) – GermanAssum (1825), lichess.org, 2019.

5.ab5 Qb6 6.e3 Ne4 (6...d5 7.Nf3=) 7.Nf3 (7.Nc3 Nc3 8.Bc3 d5+=) 7...f6 (7...d5 8.Bd4 Qd6 9.c4+=) 8.Be2 (8.Bd4 Qd8+=) 8...e5 (8...d5 9.0-0+=) 9.0-0 (9.d4 ed4 10.Nd4 Qc7+–) 9...Bc5 (9...d5 10.d4 Bd7 11.de5 Bb5 12.Bb5 Qb5 13.Bd4+=) 10.d4 Bb4 (better 10...ed4!? 11.Nd4 0-0+–) 11.de5+– f5 12.Bd4 Bc5 13.Bc4 Bd4 14.ed4 h5 (14...d6 15.ed6 Nd6 16.Ne5+–) 15.Nh4 (better 15.Re1+–) 15...Rg8?? (15...d5 16.Bd5 Qb5+–) 16.Bg8 d6 (16...Kf8 17.Bd5 g6 18.Nf5 Qb5 19.Ne3+–) 17.Qh5 Kd7 (17...Kd8 18.Qh8 Bd7 19.Bd5 Kc7 20.e6 Bb5 21.Be4 fe4 22.Nc3+–) 18.Qf5 Kd8 19.Qe4 a4 20.e6 Ke7 21.Ng6 Kd8 22.e7 Kc7 (22...Ke8 23.Bf7! Kd7 24.e8Q Kc7 25.Qd8 Kd8 26.Qe7) 23.e8N Kd8 24.Qe7 1–0. GuestNQLF – GuestVLPM, freechess.org, 2018.

5.ab5 Qc7 6.Nf3 +=.

5.ab5 d5 6.c4 dc4 7.e3 Be6 8.Nf3 Nbd7 9.Nc3 (9.Na3 Rc8=+) 9...Qc7 10.Nd4 Bd5 11.Rc1 Nc5 (better 11...e6!?=+) 12.Nd5+= Nd5 13.Bc4 Qd6 14.Nf5 (better 14.Qh5 e6 15.0-0+=) 14...Qe6? (better 14...Qg6 15.Qf3 e6=) 15.Bg7 (15.Qf3 Rd8 16.Bg7 Rg8+–) 15...Bg7?? (better 15...Rg8 16.Qh5 Nd3 17.Bd3 Nf4 18.Qh7 Nd3 19.Ke2 Nc1 20.Rc1 Rg7 21.Ng7 Bg7 22.Qg7 Rd8+–) 16.Ng7 (16.Ng7 Kd8 17.Ne6 fe6 18.Qg4+–) 1–0. BeepBeepImAJeep (2560) – juanfer1313 (2040), lichess.org, 2019.

5.ab5 d5 6.e3 Nbd7 7.d4 b6 8.Nf3 e6 9.Be2 Ne4 10.0-0 Bd6 11.Nbd2 Ndf6 12.c4 0-0 13.Ne5 Nd2 14.Qd2 Ne4 (14...Bb7 15.f3=) 15.Qc2 Be5 (15...Bb7!?+=) 16.de5+– Bd7 (16...Bb7 17.Ba3+–) 17.Rad1 (17.Ba3!? Re8 18.f3 Nc5+–) 17...Rc8+– 18.Bd3 (18.f3 Nc5 19.Ba3+–) 18...Bb5 (better 18...f5!? 19.ef6 Nf6+–) 19.Be4+– Rc4 20.Bh7 (20.Qe2 Rc5 21.Bd3 Bd3 22.Rd3 Qc7+–) 20...Kh8+– 21.Qb1 Qh4? (better 21...g6 22.Bg6! fg6+–) 22.Ba3 (22.Bd3 Rb4+–) 22...Rfc8 (22...Rg4 23.f3 (23.Bf8?! Rg2 24.Kg2 Qg4 25.Kh1 Qf3 26.Kg1 Qg4 27.Kh1 Qf3 28.Kg1 Qg4 29.Kh1=; 23.Qb5?! Rg2 24.Kg2 Qg4 25.Kh1 Qf3 26.Kg1 Qg4 27.Kh1 Qf3 28.Kg1 Qg4 29.Kh1=) 23...Bf1 24.Rf1+– (24.Bf8 Rg2 25.Kf1 Qf2; 24.fg4?! Bg2 25.Rd4 Rc8 26.Kg2 Qh7 27.Qh7 Kh7+=)) 23.Bd3 (23.Qb5 Kh7 24.Qb6 a4+–) 23...Ra4 (23...Rg4 24.g3 Bd3 25.Rd3 Qh7+–) 24.Qb5 Ra3 25.Qb6 Rac3 (25...Qb4 26.Qa6 Qc3 27.Qd6+–) 26.Qa5 f5 (26...Qe7 27.Rd2+–) 27.ef6! gf6 (27...gf6 28.Rfe1 Combination; 27...Qf6 28.Qb4 Combination) 28.Bb5 R3c7 29.Qa6 Rg8 30.Qe6 Rcg7 (30...Rh7 31.Qd6 Rhg7+–) 31.g3 Rh7 (31...Qh6+–) 32.Qg8! (32.Qg8 Kg8 33.gh4 Rh4 34.Rd5 Rg4 35.Kh1+–) 1–0. DEFFM – MacroMike, freechess.org, 2019.

5.ab5 e6 6.c4 d5 7.e3 dc4 8.Bc4 Nbd7 9.Nf3 Qc7 10.Be2 h5 (10...e5!?=) 11.0-0+= Ng4 12.h3 b6 13.Na3 (13.d4 Bd6+–) 13...Bb7+= 14.Rc1 (worse 14.hg4 hg4 15.g3 gf3 16.Bf3 Rd8–/+) 14...Qb8 15.Nc4?? (better 15.Re1+=) 15...Bf3–+ Threatening mate... how? 16.g3 Be2 17.Qe2 Ngf6 18.f4 (18.Bf6 gf6 19.h4 Qb7–+) 18...h4 19.g4 Nc5 (19...a4 20.Ra1–+) 20.Be5 Qb7 21.d4 Nce4 22.Qg2 Rd8 (22...Ra7 23.g5 Nh5 24.g6–+) 23.g5 (23.f5 ef5 24.Rf5 Qe7–/+) 23...Nh5 24.Nb6 (24.f5 Be7 25.fe6 fe6–+) 24...Nhg3 (24...Qb6 25.Qe4 Ng3 26.Qc6 Qc6 27.bc6 Nf1 28.Kf1–+) 25.Nc4? (better 25.Rc6–+) 25...Nf1 26.Rf1 (26.Na5 Qb5 27.Qe4 Ne3–+ (worse 27...Qa5 28.Qc6 Rd7 29.Kf1–+)) 26...Qd5 (better 26...Qb5!? 27.Rc1 Ng3 28.Bc7–+) 27.Na5 Nc3 (27...Qb5 28.Qe4 Qa5 29.Qc6 Rd7 30.Rb1–+) 28.Qd5 (28.b6 Kd7–+ (28...Qa5 29.Qc6 Ke7 30.f5+–)) 28...Nd5 (28...Rd5 29.b6 Ra5 30.b7–+) 29.Nc6 (better 29.e4 Nc3 30.b6–+) 29...Ne3?? (29...Rc8 30.Re1–+) 30.Rf3? (better 30.Nd8!? Kd8 31.Ra1=) 30...Nf5 (30...Nd5 31.Nd8 Kd8 32.f5–+) 31.Nd8–/+ Kd8 32.b6 (32.Rc3 Bd6 33.Bd6 Nd6–+) 32...Kd7 33.b7? (33.Rb3 Bd6 34.Bd6 Kd6 35.Kf2–+) 33...Bd6 34.Rb3 Rb8 35.g6 fg6 36.Rb6 (36.Kf2 Kc7–+) 36...Be5 (36...Kc7! 37.Rb5–+) 37.de5 (37.fe5 Ne3 38.Rb3–+) 37...Nd4 (better 37...Ne3 38.Rb3 Nd5–+) 38.Rd6=+ Ke7 39.Rd4 Rb7 40.Kf2 (40.Rc4 Rb5=+) 40...Rd7 (40...Rb3 41.Ra4–/+) 41.Rc4 (41.Ke3 Rd5=) 41...Rc7?? (better 41...Rd3=+) 42.Rc7+– (42.Rc7 Kf8 43.Kf3+–) 1–0. BeepBeepImAJeep (2420) – CaparoT1 (2410), lichess.org, 2018.

5.ab5 e6 6.c4 d5 7.e3 dc4 8.Bc4 Be7 9.Nf3 0-0 10.0-0 Nbd7 11.d4 Nb6 12.Be2 h6 13.Nbd2 a4 14.Nb1 Ne4 (14...Bd6 15.Ba3+=) 15.Bd3 Nd6 16.Nc3 Can a4 get defended? (16.Ba3 Ndc4+=) 16...Ndc4 Black intends a3 17.Bc4 Nc4 18.Bc1 (18.Na4 Nb2 19.Nb2 Ra1 20.Qa1 Bd7=) 18...a3 19.Qb3 Na5 (19...Qc7!? 20.Nb1 Na5=) 20.Qa4+= b6 21.Ba3 Bb7 (21...Ba3 22.Ra3 Bb7 23.Qd1+=) 22.Be7 Qe7 23.Ne5 Rfc8 24.Ne2 (24.Qc2 Qg5 25.e4 f6+=) 24...f6 25.Nd3 Qd6 (25...Nc4 26.Qb4 Qb4 27.Nb4=) 26.Rac1 (26.Qb4 Qb4 27.Nb4 Kf7+–) 26...Qd5 (26...Nc4 27.Qd1 e5+=) 27.f3 (better 27.Rc8!? Rc8 28.Ndf4+–) 27...Rc4 (27...Nc4 28.Qb4 Ne3 29.Rc8 Rc8 30.Ndf4=+) 28.Qd1 Qb5 29.Nef4 (29.Rb1 Qg5 30.Nef4 Rc6=) 29...e5 30.de5 Rc1 Black is in command 31.Nc1 (31.Qc1? fe5 32.Qb1 Qb1 33.Rb1 ef4 34.ef4 Ba6–+) 31...fe5 32.Ng6 (32.Ne6 Qc6 33.Nd8 Qd5 34.Nb7 Qb7=) 32...Kh7 33.Qc2 e4 34.Nf4 Rc8 35.Qd2 (35.Qe2!? Qe2 36.Nfe2–/+) 35...Nc4 36.Qe2 Qc5 37.Nb3 (37.Kf2!?–/+) 37...Qe3–+ 38.Qe3 Ne3 39.Rb1 ef3 40.gf3 Bf3 (40...Rf8 41.Ne6 Rf3 42.Nbd4–+) 41.Kf2 (41.Nd4 g5 42.Rb6 gf4 43.Nf3 Rc2–+) 41...Be4 42.Re1 Ng4 43.Kg3 Nf6 44.Nd4 Rc4 45.Kf2?? (45.Nfe6–+) 45...Rd4 46.Ne6 (46.Re2 g5 47.Ng2 Ng4 48.Kg1 b5–+) 46...Rd6 (better 46...Rd2 47.Re2 Ng4 48.Ke1 Re2 49.Ke2 Nh2 50.Nf8 Kg8 51.Nd7–+) 47.Ke3 (47.Nf4–+) 47...Re6 48.Kf2 b5 49.h3 (49.Ke3 Bd5 50.Kd2 Re1 51.Ke1 Ne4–+) 49...Re5 (better 49...Bd5 50.Rd1 b4–+) 50.Rb1 (50.Re3–+) 50...Rf5 51.Kg3 b4! 52.Rb2 (52.Rb4 Nh5) 52...Rf3 (52...Nh5 53.Kh2 Rf1 54.Rg2 g5 55.h4 g4 56.Rg1 Rf2 57.Rg2 Rg2 58.Kh1 Ng3) 53.Kh2 Rb3 (53...b3 54.Rb3 Rb3 55.Kg1 Bf3 56.Kf2 Ne4 57.Kg1 Rb1 58.Kh2 Rh1) 54.Rg2 (54.Rb3 Nd5 55.Rb2–+) 54...Bg2 55.Kg2 Rc3 56.h4 (56.Kf1 b3 57.Ke2 b2 58.Kd2 Ne4 59.Kd1 b1Q 60.Ke2 Qd3 61.Ke1 Rc1) 56...b3 57.Kf2 (57.Kh2 b2 58.h5 b1Q 59.Kg2 Qb2 60.Kf1 Rc1) 57...b2 58.Ke2 b1Q 59.Kd2 (59.Kf2 Qb2 60.Ke1 Rc1) 59...Qb2 60.Kd1 (60.Ke1 Rc1) 60…Rc1 0–1. BeepBeepImAJeep (2650) – StiffMaster1 (2385), lichess.org, 2019.

5.ab5 b6

6.c4 Bb7 7.e3 e6 8.Nf3 Bb4 9.Be2 0-0 10.0-0 d6 (10...d5 11.Na3=) 11.d4 Ne4 12.Nbd2 Nd7 13.Ne4 Be4 14.Bd3 f5 15.Rc1 (15.Ba3 Ba3 16.Ra3 Qe8=) 15...Rc8 (15...a4 16.Ba1=+) 16.Ne1 (16.Bc3 Bc3 17.Rc3 Qe8=) 16...d5 17.cd5 Bd5 18.g3 (18.Rc8 Qc8 19.Nc2 Bd6=) 18...Rc1 19.Qc1 Nf6 20.Ng2 (20.Ba3 Bd6=) 20...Qe7 21.Nf4 Rc8?? (better is 21...a4=) 22.Nd5 (22.Qc8 Qf8 23.Qa6 Qd8+–) 22...Nd5 (22...Qd7 23.Nf6 gf6+–) 23.Qd1 (better is 23.Qc8 Kf7 24.Qh8+–) 23...Bc3= 24.Ba3?? (24.Bc3 Rc3 25.Qd2 Qc7=) 24...Bb4 (better is 24...Qa3 25.Qf3 Qd6–+) 25.Bb2= Bc3 ½–½. Johansson,Roland – Svedenloef,Einar, corr SSKK Veteran–SM, 1987.

6.c4 Bb7 7.e3 e6 8.Nf3 d5 9.Be2 Nbd7 10.0-0 Be7 (10...dc4 11.Bc4 Bd6 12.d4=) 11.d4 dc4 12.Nbd2 c3 13.Bc3 Nd5 14.Bb2 0-0 15.Nc4 Rc8 16.Nce5 Ne5 17.Ne5 f6 18.Nd3 Qd7 19.Qb3 Rc7 (19...Bd6 20.e4 Nc7 21.e5 fe5 22.Ne5 Be5 23.de5=) 20.Rac1 (20.e4!? Rfc8 21.Bg4+–) 20...Rfc8 21.Rc7 (21.e4 Rc1 22.Rc1 (22.Bc1? a4 23.Qa4 Nc3–+) 22...Rc1 23.Nc1= (worse 23.Bc1 Nc7–/+)) 21...Rc7 (21...Nc7!? 22.Ne1 Ra8=+) 22.Bf3 (22.e4 Nb4 23.Bg4 Qb5+=) 22...Qd6 (22...Rc8 23.Ra1=) 23.Ra1 (23.e4 a4 24.Qa4 Nc3 25.Bc3 Rc3+–) 23...Qd7 (23...Kh8 24.Ra4 Qd7 25.e4=+) 24.Rc1 (24.e4 Nb4+–) 24...Kf7 (24...Rc1 25.Bc1 Bd6 26.Bd2=) 25.Rc4 (25.Rc7!? Qc7 26.e4+=) 25...Rc4= 26.Qc4 Nb4 27.Bb7 Qb7 28.Nf4 (28.Nb4 Bb4 29.Qd3 Kg8=) 28...Qd7 (28...Qe4!?=+) 29.Ba3= Nd5 30.Be7 Nf4 31.Ba3 Nd5 32.g3 (32.e4 Nc7 33.Qc6 Qc6 34.bc6–/+) 32...Nc7 Attacks the isolani on b5 33.Qc6 Qc6 34.bc6 The passed pawn on c6 will quickly become a dangerous weapon 34...e5 (34...b5 35.Bd6 b4 36.e4–+) 35.Bd6?? (better 35.de5 b5 36.Bd6=) 35...Ne8 36.de5? (36.Ba3 ed4 37.ed4–+) 36...Ke6 (better 36...Nd6 37.ed6 Ke8 38.f4–+) 37.c7?? (37.ef6 Nd6 38.fg7–+) 37...Nd6–+ 38.ed6 Kd7 39.Kf1 (39.e4 a4 40.f4–+) 39...a4 40.Ke2 a3 41.Kd2 (41.h4 a2 42.e4 a1Q–+) 41...a2 42.Ke2 a1Q 43.Kf3 (43.Kf3 Qd1 44.Kg2 Qd6 45.c8Q Kc8 46.h4–+; 43.h4 Qa6 44.Kd2 b5–+). BeepBeepImAJeep (2755) – Reppko (2310), lichess.org, 2016.

6.c4 Bb7 7.e3 e6 8.Nf3 Be7 9.Be2 0-0 10.0-0 d5 11.d4 dc4 12.Bc4 Nbd7 13.Nbd2 Rc8 14.Bd3 Nd5 15.Nc4 (15.Qb1 f5=) 15...N7f6 (15...Nb4 16.Be2=+) 16.Nfe5= Nb4 17.Be2 Bd6 18.Bf3 Bf3 19.Qf3 Be5 20.Ne5 (20.de5 Nd7 21.Nd6 Rc2=) 20...Nfd5 (20...Qe8!?=) 21.Rfc1 Qe8 (21...Qf6 22.Qf6 Rc1 23.Rc1 gf6 24.Nc6=) 22.Ba3 (better 22.Rc8 Qc8 23.Rc1+–) 22...Qb5?? (better 22...Rc1 23.Rc1 Qb5=) 23.Rcb1?? (better 23.Rc8 Rc8 24.Qf7 Kh8 25.Bb4 Nb4 26.Qe6+–) 23...f6–+ Black is in command 24.Ng4 h5 25.Nh6 gh6 26.Qh5 Kg7 (better 26...Qe8!? 27.Qh6 Rf7–+) 27.Bb4–/+ ab4 28.Ra7 (28.Qg4 Kf7 29.Qh5 Ke7 30.Qh6–+) 28...Rc7–+ 29.Rba1 Rff7 30.Rc7 (30.Ra8 f5 31.Qf3 Kh7–+) 30...Nc7 31.Qf3 Qd5 32.Qg3 Qg5 33.Qd6 Nd5 (better 33...b3–+) 34.Rc1?? (better 34.Qe6 Re7 35.Qd6–+) 34...b3 (34...Ne3 35.Qc6 Nf5 36.Rb1 Nd4 37.Qb6 Nf3 38.Kh1–+) 35.Rc8?? (35.Qa3–+) 35…b2 (35...b2 36.h3 b1Q 37.Kh2 Qe4–+) 0–1. BeepBeepImAJeep (2765) – Luciferthedevil (2720), lichess.org, 2020.

6.e3 Bb7= 7.Nf3 d6 (7...d5 8.Bd3=) 8.d4 Nbd7 9.Be2 g6 10.0-0 Bg7 11.c4 0-0 12.Nbd2 (12.Nc3 e5=) 12...Rc8 (12...Re8 13.Qb3=) 13.Ng5 (13.Qb3 Re8=) 13...h6 14.Bf3 Bf3 15.Ngf3 Re8 16.e4 e5 17.Re1 Qe7 (17...ed4 18.Nd4 Ne5 19.Qe2=) 18.Qc2 Rcd8 (18...ed4 19.Nd4 Nc5 20.Nc6=) 19.Bc3 (19.Ra3 Nh5+=) 19...Ra8= 20.Qb2 (20.Ra2 ed4 21.Nd4 Nc5=) 20...Rec8 (20...Nh5!?=) 21.de5+= de5 22.Ne5 (22.Be5?! Ne5 23.Qe5 Qe5 24.Ne5 Re8=) 22...Ne5 23.Be5 Rd8 (23...a4 24.Re3+=) 24.Bd4 (24.Nf3 Rac8 25.Rac1+–) 24...Rd7? (better 24...a4!?+=) 25.e5+– (25.Bb6?! Ne4 26.Re4 Bb2 27.Re7 Re7=+) 25...Nh5 26.Nf3 (26.Re4 Rad8 27.g3 Qb4 28.Qb4 ab4 29.Bb6 f5 30.Bd8 fe4+–) 26...Qe6+– 27.Be3 Re8 (27...a4!?+–) 28.c5+– Be5?? (better 28...bc5 29.Ra5 Rd3+–) 29.Bd4 (worse 29.Ne5 Qe5 30.Qe5 Re5+–) 29...Qf6 (29...f6 30.Be5 fe5 31.Re5 Qf7+–) 30.Re5 Re5 31.Ne5 Qh4 (31...Rb7 32.cb6 Qf5+–) 32.Nd7 (32.Nd7 Kh7 33.c6+–) 1–0. DEFFM – viraaj, freechess.org, 2020.

6.Nf3 e6 =.

4.a4 Qb6

5.e3 d5 6.Nf3=.

5.e3 Ne4 6.Nf3 (6.Nc3 Nf6+–) 6...h5 (6...Na6 7.Be2+=) 7.Be2 (7.Nc3 Nf6+–) 7...c5 (7...Na6!?+–) 8.0-0+– h4 9.d3 Ng3?? (better 9...Nf6 10.h3 d6+–) 10.fg3 hg3 11.hg3 Qh6 12.Qd2 Qh1 (12...d6 13.e4+–) 13.Kf2 Qh6 14.Nc3 e6 15.Ne4 (15.g4 d6+–) 15...f5 (15...d5 16.Neg5 f6+–) 16.Neg5 Be7 (16...d6+–) 17.Rh1! Qh1 18.Rh1 Rh1 19.Qc3 Bf6 (19...Bf8 20.Nh4 Rh4 21.gh4+–) 20.Qc5 Bb2 (20...Na6 21.ba6 b6 22.Qb6 Ra6+–) 21.Qc8 Ke7 22.Qb7 1–0. DEFFM – GuestZSVJ, freechess.org, 2019.

5.e3 g6 6.c4 (6.Bf6 ef6 7.Nc3 d5+=) 6...Bg7= 7.Nc3 (7.d4 d6=) 7...0-0 8.Qc2 (8.d4 d6=) 8...d6 (8...d5 9.d4=) 9.Nf3 Bf5 10.d3 Nbd7 (10...e5 11.Rb1=) 11.e4 (11.Nd4 Qc5=) 11...Bg4= 12.Be2 Nh5 (12...Bf3 13.Bf3 Ne5 14.Be2=) 13.bc6+= bc6 14.Rb1 (14.h3 Bf3 15.Bf3 Rab8=) 14...Bf3 15.Bf3+= Nf4 16.0-0 Qa7 17.Ne2 Ne2= 18.Be2 (18.Qe2 Rab8+=) unclear. Oberfrank,I – Hornyak,J, HUN, 1994.

4.a4 d5

5.e3 Nbd7 6.d4 Qc7 7.Nf3 c5 8.c4 (8.dc5 e6+=) 8...dc4 (8...cd4 9.Qd4 e5 10.Ne5=) 9.Qc2 cd4 10.Nd4 (better 10.Bc4!? e6 11.Bd4=) 10...e5–/+ 11.Nf3 Bb4 12.Nc3 0-0 13.Be2 b6 (13...Nb6!?–/+) 14.0-0= Bb7 15.Na2? (better 15.Nd2!?=) 15...Rfc8 16.Nc3 Nc5 17.Rad1 Nd3! 18.Bd3? (better 18.Ba1–/+) 18...cd3–+ 19.Qd3 Bf3 (19...e4 20.Ne4 Be4 21.Qe2–+) 20.gf3 Bc3 21.Bc3? (21.Rc1 Bb2 22.Rc7 Rc7 23.Rb1–/+) 21...Qc3 22.Qd6 (22.Qc3 Rc3 23.Rd6 Ra3–+) 22...Qc5 (22...Qb4 23.Qe5 Qa4 24.Rc1–+) 23.Qd3 (23.Qc5 bc5 24.Rd2 Kf8–+) 23...e4! 24.fe4 Qh5 (24...Qb4 25.Qd4 Ne4 26.Qb4 ab4 27.Rd4–+) 25.Rc1 (25.f3 Re8–+) 25...Ng4 (25...Rd8!? 26.Qc2 Qg4 27.Kh1 Qf3 28.Kg1 Ne4 29.Qc7–+) 26.Rc8 Rc8 27.Qd6 Qe5 (better 27...Nf6!? 28.f3–+) 28.Rd1 Qh2?? (better 28...Qg5 29.Qg3 f5–+) 29.Qh2= Nh2 30.Kh2 Kf8 31.Kg3 Ke7 32.Rd4 Rd8 33.Rc4 Rd6 34.Kf4 f6 35.Rc7 (35.e5 fe5 36.Ke5 Re6 37.Kf4 h6=) 35...Kf8 (35...Rd7!? 36.Rd7 Kd7=) 36.e5+= fe5 (36...Re6!?+=) 37.Ke5+– Rg6 38.Rc6 Rc6 39.bc6 Ke7 40.Kd5? (better 40.f4–+) 40...h5 41.Kc4 (41.Ke5–+) 41...h4 42.Kb5 h3 43.Kb6 h2 44.c7 h1Q (better 44...Kd7 45.Ka5 Kc7–+) 45.c8Q+– Qf1? (better 45...Qe1+–) 46.Qb7 Kf6 47.Qc6 Kf7 48.Qd7 Kg6 49.Qe6 Kh5 50.Qf5 g5 (50...Kh6 51.Ka5 Qd1 52.Qe6 Kh7 53.Qe4 Kg8 54.f4+–) 51.Ka5 (better 51.f4!? Kh4 52.Qg5 Kh3 53.Qa5 Qc4 54.Qh5 Kg3 55.Qg6 Kh4 56.Qf6 Kg3+–) 51...Qe1 (51...Qc4 52.Qe5 Kg6 53.Qe8 Kh6 54.Qh8 Kg6 55.Qd4+–) 52.Kb5 Qe2 53.Kc5 (53.Kb6 Qb2 54.Ka6 Qe2 55.Ka7 Qc4+–) 53...Qa6 54.Qh3 (54.Qf7 Kh6 55.Qf8 Kh5 56.Qf3 g4 57.Qf5 Kh4 58.Qh7 Kg5 59.Qg8 Kh4 60.Qh8 Kg5 61.Qd8 Kh5+–) 54...Kg6 55.Qd7 Qe2 (55...Qa5 56.Qb5 Qe1 57.Qc6 Kf7 58.Qd5 Kf6 59.Qd4 Kf7 60.e4+–) 56.Qe6 Kh5 57.Qf7 Kg4 (57...Kh6 58.a5 Qa6+–) 58.Qe6 Kh4?? (58...Kh5 59.Qe8 Kh6 60.Qc6 Kg7+–) 59.Qh6 (better 59.Qc4 Qc4 60.Kc4+–) 59...Kg4 60.Qe6 Kh4?? (better 60...Kh5=) 61.Qh6 ½–½. GuestNBGJ – GuestDHTQ, freechess.org, 2017.

5.e3 Nbd7 6.Nf3 Qc7 7.d4 e6 8.Bd3 c5 9.c4 (9.0-0!?=) 9...cd4–/+ 10.ed4 (10.Nbd2 de3 11.fe3 Nc5=+) 10...dc4 11.Qc2 Bb4 12.Kf1 Nb6 13.Ne5 0-0 (13...Bd7 14.Na3 c3 15.Bc1–+) 14.g3 g6 (14...Bd7 15.Kg2–/+) 15.Kg2 Nbd5 (15...Bd7!?–/+) 16.Bc4 b6 17.Rc1 Qb7 (17...Bb7 18.Kg1=) 18.Kg1 Nd7 (18...Qe7 19.Nc6 Qe8 20.Nc3 Bc3 21.Bc3=) 19.Nd2+= Ne5 (19...N7f6 20.Be2+=) 20.de5+– Bd7 (20...Bd2!? 21.Qd2 Rd8+–) 21.Ne4+– Rac8 (21...Be7 22.Qd2 f5 23.Nd6 Bd6 24.ed6+–) 22.Qd3 Rfd8? (better 22...Be7+–) 23.Bd5 ed5 24.Nf6 Kh8 (24...Kf8 25.Nh7 Ke8 26.Nf6 Kf8+–) 25.Nd7 Rc1 (25...Kg8 26.Rc8 Qc8 27.Nb6+–) 26.Rc1 (26.Bc1?! Rd7 27.e6 Rd6 28.Bb2 d4 29.ef7 Qf7 30.Bd4 Kg8+–) 26...Qd7 (26...Bc5+–) 27.e6 (27.e6 f6 28.ed7 Kg7 29.Qd5 Bd2 30.Qd2 h5 31.Rc8 g5 32.Qg5 Kh7 33.Bf6 Rc8 34.Qg7) 1–0. DEFFM – MacroMike, freechess.org, 2019.

5.e3 Bf5 6.Nf3 Nbd7 (6...e6 7.Be2=) 7.Be2 (7.Nd4 Bg4 8.f3 c5 9.fg4 cd4 10.ed4 Qc7+=) 7...Qc7 8.Nh4 Be6 (8...Bg6 9.f4 e6 10.Ng6 hg6 11.Na3=) 9.f4 g6 (9...Nc5 10.0-0+=) 10.0-0 (10.g4 d4 11.g5 Bd5+–) 10...0-0-0 (10...Bg7!?=) 11.bc6+– Qc6 12.Bd4 (12.Ra3 Nc5+–) 12...Nc5 (12...Bg7 13.Ra3 Qd6 14.Rc3 Kb8 15.Rb3+–) 13.Nc3 Rg8 (13...Bg7!?+–) 14.Be5 b6 (better 14...Qb6+–) 15.d4 Nce4 (15...Nfd7 16.Bb5 Qa8 17.dc5 Ne5 18.fe5 bc5+–) 16.Ba6 (16.Ba6 Kd7 17.Ne4 Ne4 18.Bb5+–) 1–0. onur604 (2320) – nightwoolf (2205), lichess.org, 2020.

5.e3 g6 6.c4 Bg7 7.Nf3 0-0 8.Be2 Nbd7 9.0-0 Nc5 (9...dc4 10.bc6 bc6 11.Na3=) 10.cd5 cd5 11.d4 Nce4 12.Nc3 Bf5 13.Rc1 Rc8 14.Qb3 Nc3 15.Bc3 Ne4 16.Bb2 Qd6 17.Ba3 Qd7 18.Rfd1 Bg4 19.h3 Bf5 20.Ne5 Be5 21.de5 Rc1 22.Bc1 Rc8 23.Bb2 Be6 24.Bf3 (24.Qd3 Nc5 25.Qa3 Ne4+=) 24...Qc7 (24...Ng5 25.Bg4 (25.Bd5?! Rd8 26.Qc3 Ne4 27.Qa5 Bd5+–) 25...Bg4 26.hg4 Qg4 27.Qd5–/+) 25.Qd3 (25.Rc1 Qd8 26.Rc8 Qc8+–) 25...Qc2 26.Qd4?? (better 26.Be4 de4 27.Qc2 Rc2 28.Ba3+=) 26...Qf2–+ 27.Kh2 Qg3 28.Kg1 Rc2 29.Be4 de4 30.Qe4 Rb2 31.Qb7 (31.Qf3 Qf3 32.gf3 Bh3 33.Rd8 Kg7 34.Rb8 Rg2 35.Kh1–+) 31...Bh3 32.e6 (32.Qc8 Bc8 33.Rd8 Kg7 34.Rg8 Kg8 35.b6 Qg2) 32...Rg2 33.Qg2 Qg2 0–1. BeepBeepImAJeep (2705) – Aronyak1 (2745), lichess.org, 2020.

5.e3 g6 6.Nf3 Bg7 7.Be2 0-0 8.0-0 Nbd7 9.d4 Ne4 10.Nbd2 Nd6 11.bc6 bc6 12.c4 Ba6 13.Qc2 Nb6 14.Ne5 Be5 15.de5 Ndc4 16.Nc4 Bc4 (worse is 16...dc4 17.Rfd1 Qc7 18.e4+=) 17.Rfc1 Be2 18.Qe2 Nc4 19.Bd4 Rb8 20.e6 (20.e4!?–/+) 20...fe6–+ 21.Rc4 dc4 22.Qc4 Qd5 23.Qc3 Qf5 24.f4 (24.Qe1 Rb4–+) 24...Rb1 25.Rb1 Qb1 26.Kf2 Qa2 27.Kg3 Qa4 28.Qc5 Kf7 29.Qg5 Qb5 30.Qh6 Qh5 31.Qg7 Ke8 32.h4 h6 33.Qh7 Kd7 34.Bg7 Rf7 35.Qh8 Qe2 36.Bd4 g5! 37.Qb8 gf4 38.Kh2 Qa6 39.Be5 Qc8 40.Qa7–/+ Ke8 41.ef4 Rf5 42.Qa5 c5 43.Qb5 Kf7 44.Qc4 Qc6 45.g4 Re5 46.fe5 Qd5 47.Qc3+= c4 48.Kg3 Kg7 49.h5 Qb5 50.Kf2 Qb3 51.Qc1 Qb6 52.Kf3 Qb5 53.Kf2 Qb3 54.g5 Qd3 55.gh6 Kh7 56.Qg5?? Qf5–+ 57.Qf5 ef5 58.e6 Kh6 59.Ke3 Kh5 60.Kd4 Kg4 61.Kc4 f4 62.Kd5 f3 63.Kc6 Kg3 0–1. Ehrlich,Hans Georg (1930) – Rehfeldt,Frank (2050), Muensterland Verbandsliga, 2008.

4.a4 g6

5.Nc3 A) 5...Bg7 A1) 6.e3 d6 (6...0-0 7.Rb1 d6 8.Nf3 Nbd7 9.bc6 bc6 10.Be2 Nc5 11.0-0 Rb8; 6...d5 7.Nf3 0-0 8.Be2 Nbd7 9.d4 Ne4 10.0-0 Ndf6 11.bc6 bc6) 7.Nf3 Nbd7 8.d4 0-0 9.Bd3 Nd5 10.Qd2 N7f6 11.0-0 Nb4; A2) 6.Nf3 d5 (6...0-0 7.e3 d5 8.Be2 Nbd7 9.0-0 Nc5 10.d4 Nce4 11.bc6 bc6; 6...d6 7.g3 0-0 8.Bg2 Nbd7 9.bc6 bc6 10.0-0 Rb8 11.Rb1 Nd5) 7.e3 0-0 8.Be2 Nbd7 9.d4 Ne4 10.0-0 Ndf6 11.bc6 bc6 ; B) 5...d6 B1) 6.g3 d5 (6...Bg7 7.Nf3 d5 8.d3 0-0 9.Bg2 Bg4 10.0-0 Nbd7 11.Qd2 Qc7; 6...Bh6 7.Nf3 0-0 8.Bg2 Qb6 9.0-0 Be6 10.e3 c5 11.Ne2 Nbd7; 6...Nbd7 7.Nf3 Bg7 8.Bg2 0-0 9.0-0 Qc7 10.Rb1 Nc5 11.bc6 bc6; 6...Qb6 7.Nf3 Bh6 8.Bg2 0-0 9.0-0 Be6 10.e3 c5 11.h4 Bg4; 6...Qc7 7.Nf3 Bg7 8.Bg2 0-0 9.Rb1 Nbd7 10.0-0 Nc5 11.bc6 bc6) 7.Nf3 Bg7 8.d3 0-0 9.Bg2 Bg4 10.0-0 Nbd7 11.Qd2 Qc7 ; B2) 6.e3 Nbd7 (6...Bg7 7.Nf3 Nbd7 8.d4 0-0 9.Bd3 Nd5 10.Qd2 N7f6 11.0-0 Nb4; 6...Bh6 7.Nf3 Nbd7 8.h4 Ne5 9.Ne5 de5 10.Bc4 Bf5 11.f3 Qc7) 7.Nf3 Bg7 8.d4 0-0 9.Bd3 Nd5 10.Qd2 N7f6 11.0-0 Nb4; B3) 6.Nf3 Bg7 (6...Nbd7 7.d4 Bg7 8.e4 0-0 9.Bd3 c5 10.0-0 cd4 11.Nd4 Qb6; 6...Bh6 7.e3 Nbd7 8.Be2 0-0 9.d4 Nb6 10.h4 Nbd5 11.0-0 Qc7; 6...Qb6 7.Rb1 Bg7 8.e3 0-0 9.Bd3 cb5 10.Nb5 Na6 11.Bd4 Nc5; 6...Qc7 7.g3 Bg7 8.Bg2 0-0 9.0-0 Nbd7 10.Rb1 Nc5 11.bc6 bc6) 7.g3 d5 8.e3 0-0 9.Bg2 Nbd7 10.0-0 Nc5 11.Ne5 Nfd7; C) 5...Bh6 C1) 6.e3 0-0 (6...d6 7.Nf3 0-0 8.Rb1 Nbd7 9.Be2 Nc5 10.0-0 Qc7 11.bc6 bc6; 6...d5 7.Nf3 Nbd7 8.d4 0-0 9.Bd3 c5 10.0-0 cd4 11.ed4 b6) 7.h4 d5 8.Be2 e5 9.h5 g5 10.Nf3 d4 11.Nb1 Re8; C2) 6.h4 d5 (6...d6 7.e3 Nbd7 8.Nf3 Ne5 9.Ne5 de5 10.Bc4 Rb8 11.Ba3 0-0; 6...Qb6 7.e3 d5 8.Be2 Nbd7 9.Nf3 Nc5 10.Rb1 Qc7 11.d4 Nce4) 7.e3 Nbd7 8.Nf3 Qc7 9.g4 Bg7 10.h5 Rg8 11.hg6 hg6; C3) 6.e4 d6 (6...d5 7.ed5 cd5 8.Nf3 0-0 9.Bd3 Nbd7 10.Ba3 Qb6 11.0-0 Nc5; 6...Bg7 7.e5 Nh5 8.Qe2 0-0 9.Nh3 f5 10.Ng5 e6 11.h4 h6; 6...0-0 7.e5 Nh5 8.Nf3 d6 9.Bc4 de5 10.0-0 Nd7 11.bc6 bc6) 7.Nf3 0-0 8.Bc4 d5 9.ed5 cd5 10.Bb3 Be6 11.Nd4 Qb6; C4) 6.Nf3 0-0 (6...d6 7.g3 Qb6 8.Rb1 0-0 9.Bg2 Be6 10.0-0 c5 11.e3 Nbd7; 6...d5 7.e3 Nbd7 8.g4 Bg7 9.bc6 bc6 10.g5 Ne4 11.Rb1 0-0; 6...Qb6 7.e3 0-0 8.Be2 d5 9.Ba3 Re8 10.0-0 Nbd7 11.d4 Bg7) 7.e3 d6 8.Rb1 Nbd7 9.Be2 Nc5 10.0-0 Qc7 11.bc6 bc6; D) 5...d5 D1) 6.Nf3 Bg7 (6...Nbd7 7.d4 cb5 8.Nb5 Bg7 9.g3 Nb6 10.Ne5 Ng4 11.e3 Ne5; 6...Bh6 7.e3 Nbd7 8.g4 Bg7 9.g5 Ne4 10.Rb1 Bc3 11.Bc3 0-0) 7.e3 0-0 8.Be2 cb5 9.Nb5 Nc6 10.0-0 Bf5 11.c4 dc4; D2) 6.e3 Bg7 (6...Nbd7 7.Nf3 Bg7 8.d4 0-0 9.Be2 Ne4 10.0-0 Ndf6 11.bc6 bc6) 7.Nf3 0-0 8.Be2 Nbd7 9.0-0 Nc5 10.d4 Nce4 11.bc6 bc6.

5.e3 Qb6 A) 6.Nf3 d5 (6...Bg7 7.Bd4 c5 8.Bf6 Qf6 9.Nc3 d5 10.Bd3 0-0 11.0-0 Qd6; 6...d6 7.Na3 Nbd7 8.Nc4 Qc7 9.bc6 bc6 10.g4 h6 11.Rb1 Bg7) 7.c4 Bg7 8.Bd4 c5 9.Bf6 Qf6 10.Nc3 dc4 11.Bc4 Nd7; B) 6.Be2 Bg7 (6...d5 7.Nf3 Bg7 8.Nc3 0-0 9.0-0 cb5 10.Nb5 Nc6 11.c4 Bg4; 6...Bh6 7.Nf3 0-0 8.Bf6 ef6 9.Nc3 Re8 10.h4 f5 11.h5 Bg7; 6...cb5 7.ab5 d6 8.Na3 Qc7 9.Nf3 Nbd7 10.Nc4 Bg7 11.Bd4 a4; 6...d6 7.Bd4 Qc7 8.Nf3 Bg7 9.Na3 e5 10.Bc3 0-0 11.Nc4 Nbd7) 7.Nf3 0-0 8.Nc3 d5 9.0-0 cb5 10.Nb5 Nc6 11.c4 Bg4; C) 6.Bd3 d5 (6...Bg7 7.Nf3 d5 8.Nc3 Nbd7 9.0-0 Nc5 10.Rb1 Nd3 11.cd3 0-0) 7.Bf6 ef6 8.Nc3 Nd7 9.Nf3 Bb4 10.bc6 bc6 11.0-0 0-0; D) 6.Nc3 Bg7 (6...d5 7.Rb1 Bh6 8.bc6 bc6 9.Ne4 Qd8 10.Nf6 ef6 11.Ba3 Bf8; 6...d6 7.Nf3 Bg7 8.Rb1 0-0 9.Bd3 cb5 10.Nb5 Na6 11.Bd4 Nc5) 7.Nf3 0-0 8.Bd3 d5 9.0-0 cb5 10.Nb5 Nc6 11.c4 Be6.

5.e3 d5 6.Be2 (6.Bf6 ef6 7.Nf3 Bd6= (7...Bc5 8.Bd3 0-0 9.Nc3 Nd7 10.0-0 Ne5 11.bc6 bc6) 8.c4 dc4 9.Bc4 cb5 10.ab5 0-0 11.Nc3 Nd7; 6.Nc3 Nbd7 (6...Bg7 7.Nf3 0-0 8.Bd3 Nbd7 9.bc6 bc6 10.Ba3 Ng4 11.0-0 Rb8; 6...Qc7 7.Nf3 Nbd7 8.d4 Bg7 9.Be2 0-0 10.0-0 Nb6 11.Ne5 Nfd7; 6...Bh6 7.Nf3 Nbd7 8.Ba3 Ne4 9.bc6 bc6 10.Ne4 de4 11.Nd4 Ne5) 7.Nf3 Bg7 8.Be2 0-0 9.0-0 Nc5 10.d4 Nce4 11.Qe1 Nc3; 6.Nf3 Bg7 (6...Nbd7 7.g4 h6 8.Nc3 Bg7 9.Rg1 Nc5 10.d4 Nce4 11.Ne5 Qd6 ; 6...Bh6 7.Nc3 Nbd7 8.g4 Bg7 9.g5 Ne4 10.Rb1 Bc3 11.Bc3 0-0) 7.Nc3 Nbd7 8.d4 0-0 9.Bd3 cb5 10.Nb5 Ne4 11.c3 Ndf6; 6.Bd3 Nbd7 (6...Bg7 7.Nf3 Nbd7 8.0-0 0-0 9.Nc3 Nc5 10.h3 Qc7 11.Rb1 Nd3; 6...cb5 7.Bb5 Nc6 8.Nc3 Bg7 9.Nf3 0-0 10.0-0 Bf5 11.d3 Qc7) 7.Nc3 Bg7 8.bc6 bc6 9.Nf3 Nc5 10.0-0 0-0 11.Rb1 Rb8) 6...Bg7 (6...Nbd7 7.Nf3 Bg7 8.Nc3 0-0 9.0-0 Nc5 10.d4 Nce4 11.bc6 bc6; 6...Bh6 7.Nf3 0-0 8.Nc3 Nbd7 9.0-0 Nc5 10.d4 Nce4 11.bc6 bc6; 6...cb5 7.ab5 Bg7 8.Nf3 0-0 9.0-0 Nbd7 10.Nc3 Nc5 11.Na4 Na4; 6...Qb6 7.Nf3 Bg7 8.Nc3 0-0 9.0-0 cb5 10.Nb5 Nc6 11.c4 Be6; 6...Qd6 7.Nf3 Nbd7 8.bc6 bc6 9.Ba3 c5 10.Nc3 Bg7 11.Rb1 0-0) 7.f4 (7.Nf3 0-0= (7...cb5 8.Bb5 Nc6 9.Nc3 0-0 10.0-0 Bf5 11.d3 Qc7) 8.Nc3 Nbd7 9.d4 Ne4 10.0-0 Ndf6 11.bc6 bc6) 7...0-0 (7...cb5 8.Bb5 Nc6 9.Nf3 0-0 10.0-0 Bg4 11.Qe2 Ne4) 8.Nf3 Bg4 (8...c5 9.0-0= Qb6 10.Na3 Bg4 11.c4 Nbd7; 8...cb5 9.ab5 Nbd7 10.0-0 Nc5 11.Bd4 Qd6) 9.Na3 (9.0-0 c5= (9...cb5 10.ab5 Nbd7 11.Nc3 Nc5) 10.h3 Bf3 11.Bf3 Nbd7; 9.Nc3 Ne4 10.0-0 cb5 11.ab5 Bc3) 9...Nbd7 (9...Qd6 10.Be5 Qb4 11.c3 Qb2) 10.0-0 Nb6 (10...Nc5 11.c4= (11.bc6 bc6) 11...Bf3; 10...Bf3 11.Bf3 Nc5) 11.bc6 (11.c4 Ne4) 11...bc6 12.c4 dc4 13.Rc1 (13.Nc4 Nc4 14.Bc4=) 13...Ne4+= 14.Bg7 Kg7 15.Nc4 (15.Bc4? Bf3 16.Qf3 Nd2 17.Qc6 Nf1 18.Rf1 Rc8–+) 15...Bf3 16.gf3 (worse is 16.Rf3 Nc4 17.Bc4 Nd2–/+) 16...Nc5 (16...Nd6 17.Ne5 Rc8 18.Nc6+=) 17.Nb6+/– Qb6 18.Qc2 Ne6 19.Qc6 Qb4 (19...Qc6 20.Rc6 Rab8 21.Bb5+/–) 20.Qc3 f6 (20...Qc3 21.Rc3 Rab8 22.Bb5+/–) 21.Qb4 ab4 22.Bb5 Rfc8 (better is 22...Rfd8 23.d4 Nd4 24.ed4 Rd4+–) 23.Rc8 Rc8 24.Bd7 Ra8 25.Be6 Ra4 26.Bc4 1–0. Szollosi,Laszlo Jr – Koczka,Zsolt (2240), Mesterjelolt–ch, 1990.

5.e3 d6 A) 6.Nf3 Bg7 (6...Nbd7 7.Nc3 Bg7 8.d4 0-0 9.Bd3 Nd5 10.0-0 Nc3 11.Bc3 Nc5; 6...Bh6 7.Nc3 Nbd7 8.d4 0-0 9.Bd3 Nb6 10.0-0 Be6 11.Qe2 Nbd5) 7.Nc3 0-0 8.Be2 Nbd7 9.0-0 Nc5 10.d4 Nfe4 11.bc6 bc6; B) 6.Nc3 Nbd7 (6...Bg7 7.Nf3 Nbd7 8.d4 Nd5 9.Bd3 0-0 10.0-0 Nc3 11.Bc3 Nc5) 7.Nf3 Bg7 8.d4 Nd5 9.Bd3 0-0 10.0-0 Nc3 11.Bc3 Nc5; C) 6.Be2 Nbd7 (6...Bg7 7.Nf3 cb5 8.Bb5 Nc6 9.Nc3 0-0 10.0-0 Bf5 11.h3 d5; 6...cb5 7.Bb5 Nc6 8.Nc3 Bg7 9.Nf3 0-0 10.0-0 Bf5 11.h3 d5; 6...Bh6 7.Nf3 cb5 8.Bb5 Nc6 9.Nc3 0-0 10.h3 Qb6 11.0-0 Bg7) 7.Nc3 Bg7 8.Nf3 0-0 9.d4 Nb6 10.0-0 Nbd5 11.Nd5 cd5; D) 6.Na3 Nbd7 (6...Bg7 7.Bd3 Nbd7 8.Nf3 Nc5 9.bc6 bc6 10.Nc4 0-0 11.0-0 Rb8; 6...Bf5 7.Nf3 Bg7 8.Nc4 cb5 9.ab5 d5 10.Nce5 Nbd7 11.g4 Ne5; 6...Bh6 7.Nf3 0-0 8.Nc4 Nbd7 9.bc6 bc6 10.Nd4 Qc7 11.Qf3 d5; 6...Bd7 7.Nf3 Bg7 8.Bd3 0-0 9.0-0 cb5 10.ab5 a4 11.Nb1 Nd5) 7.Nf3 Bg7 8.Nc4 cb5 9.ab5 0-0 10.Be2 d5 11.Nce5 Ne4; E) 6.Bf6 ef6 7.Nc3 Bg7 8.h4 Nd7 9.Nf3 f5 10.h5 Nc5 11.bc6 bc6.

5.e3 Bg7 A) 6.Nc3 0-0 (6...d5 7.Nf3 0-0 8.Be2 Nbd7 9.d4 Nb6 10.0-0 Qc7 11.Ne5 Nfd7; 6...d6 7.Nf3 0-0 8.Be2 cb5 9.Nb5 Nc6 10.0-0 Bd7 11.h3 Ne4) 7.Nf3 d5 8.Be2 Nbd7 9.0-0 Nc5 10.Qe1 Bf5 11.Nd4 Qd7; B) 6.Be2 cb5 (6...d5 7.Nc3 0-0 8.Nf3 Nbd7 9.d4 Nb6 10.0-0 Qc7 11.Ne5 Nfd7; 6...0-0 7.Nc3 d5 8.Nf3 Nbd7 9.d4 Nb6 10.0-0 Qc7 11.Ne5 Nfd7; 6...d6 7.Nf3 cb5 8.ab5 Nbd7 9.Nc3 0-0 10.d4 Nb6 11.0-0 a4) 7.Bb5 Nc6 8.Ne2 0-0 9.Nbc3 d5 10.0-0 Bf5 11.h3 e5; C) 6.Bd3 d5 (6...0-0 7.Nc3 d5 8.Nf3 Nbd7 9.bc6 bc6 10.Ba3 Ng4 11.Rb1 Nde5; 6...d6 7.Nf3 Nbd7 8.Nc3 0-0 9.0-0 Nc5 10.h3 e5 11.Bc4 Be6) 7.Nc3 Nbd7 8.Nf3 Nc5 9.0-0 0-0 10.Ba3 Nfe4 11.bc6 bc6; D) 6.f4 0-0 (6...d5 7.Nf3 0-0 8.Nc3 Ne4 9.Be2 Qb6 10.Ne5 Nd7 11.Ne4 Ne5; 6...d6 7.Nf3 Nbd7 8.Nc3 Nc5 9.Be2 0-0 10.0-0 Bf5 11.Nd4 Qd7; 6...Qc7 7.Nf3 0-0 8.Nc3 d5 9.Be2 Nbd7 10.0-0 Nc5 11.Rb1 Bd7; 6...Qb6 7.Nf3 0-0 8.Nc3 d5 9.Rb1 c5 10.Bd3 c4 11.Be2 Nbd7) 7.Nc3 Ne4 8.Nf3 d5 9.Be2 cb5 10.ab5 Nc3 11.Bc3 Bc3; E) 6.Nf3= d5 (6...0-0 7.Nc3 d5 8.Be2 Nbd7 9.0-0 Nc5 10.d4 Nce4 11.bc6 bc6; 6...d6 7.Nc3 0-0 8.Be2 cb5 9.Nb5 Nc6 10.0-0 Bf5 11.d3 Qb6; 6...cb5 7.ab5 0-0 8.Nc3 d5 9.Bd3 Nbd7 10.Ba3 Nb6 11.0-0 Re8) 7.Nc3 0-0 8.Be2 Nbd7 9.0-0 Nc5 10.d4 Nce4 11.bc6 bc6.

5.e4 A) 5...d5 A1) 6.e5 Ne4 7.d3 Nc5 8.d4 Ne4 9.f3 Ng5 10.Kf2 Bg7 11.Ne2 Qb6; A2) 6.Nc3 d4 (6...Bg7 7.ed5 Nd5 8.Nf3 0-0 9.Be2 Nd7 10.0-0 Nc5 11.d4 Nc3) 7.Nce2 e5 8.Nf3 Bd6 9.Ng3 0-0 10.Bc4 Nbd7 11.0-0 Nb6 ; A3) 6.ed5 cd5 7.Nf3 Nbd7 8.Bd4 Bg7 9.Bd3 0-0 10.0-0 Ne4 11.Bg7 Kg7; B) 5...d6 B1) 6.Bf6 ef6 7.Nc3 Bg7 8.Nf3 0-0 9.Bd3 cb5 10.Bb5 f5 11.Qe2 Nc6; B2) 6.Nf3 Bg7 (6...Nbd7 7.Nc3 Nc5 8.e5 de5 9.bc6 bc6 10.Ne5 Qc7 11.d4 Ncd7) 7.Bd3 Nbd7 8.Qe2 Nc5 9.0-0 0-0 10.Nc3 Bd7 11.Rab1 Nd3; B3) 6.Bd3 Nbd7 (6...Bg7 7.Nc3 Nbd7 8.Nf3 Nc5 9.Qe2 Qb6 10.0-0 0-0 11.Rab1 Nd3; 6...cb5 7.Bb5 Nc6 8.Nf3 Bg7 9.Qe2 0-0 10.0-0 Bg4 11.Nc3 Qb6) 7.Nf3 Bg7 8.Nc3 Nc5 9.Qe2 0-0 10.0-0 Qc7 11.Rab1 Bd7; B4) 6.Nc3 Bg7 (6...Bh6 7.Nf3 0-0 8.Bc4 d5 9.ed5 cd5 10.Bb3 Be6 11.0-0 Qb6; 6...Nbd7 7.d4 d5 8.e5 Ne4 9.Nf3 Bh6 10.Bd3 Nc3 11.Bc3 c5) 7.d4 d5 8.Bd3 de4 9.Ne4 Ne4 10.Be4 Qb6 11.Qd3 Na6; C) 5...Bh6 C1) 6.Nf3 d6 (6...d5 7.ed5 cd5 8.Bd3 0-0 9.0-0 Nbd7 10.Bd4 e5 11.Ne5 Ne5; 6...0-0 7.e5 Ne4 8.Nc3 d5 9.ed6 Nd6 10.Be2 Bf5 11.0-0 Nd7) 7.Nc3 0-0 8.Bc4 Nbd7 9.0-0 Ne5 10.Be2 Nf3 11.Bf3 Be6; C2) 6.Bd3 d5 (6...d6 7.Nf3 0-0 8.Nc3 Nbd7 9.0-0 Nc5 10.Qe2 Bg4 11.Rab1 Bf3; 6...0-0 7.e5 Nh5 8.Nf3 Nf4 9.0-0 d6 10.Nc3 Nd3 11.cd3 Bf5) 7.ed5 cd5 8.Nf3 0-0 9.0-0 Nbd7 10.Bd4 e5 11.Ne5 Ne5 ; C3) 6.Nc3 d6 (6...d5 7.ed5 cd5 8.Nf3 0-0 9.Bd3 Nbd7 10.0-0 e5 11.g4 Ng4) 7.Nf3 0-0 8.d4 Be6 9.Bd3 Qb6 10.Rb1 Qc7 11.0-0 Nbd7; C4) 6.e5 Ne4 7.Bd3 Nc5 8.Nf3 d5 9.Nc3 0-0 10.0-0 Nbd7 11.Qe2 Bg7; D) 5...Bg7= D1) 6.Bd3 d6 (6...0-0 7.Nf3 d5 8.ed5 Nd5 9.Bg7 Kg7 10.0-0 cb5 11.ab5 Nf4; 6...cb5 7.ab5 0-0 8.Nf3 d6 9.Nc3 Nbd7 10.Na4 Ng4 11.Bg7 Kg7) 7.Nf3 Nbd7 8.Nc3 Nc5 9.Qe2 0-0 10.0-0 Qb6 11.Rab1 Nd3; D2) 6.e5 Nd5 7.Nf3 d6 8.Nc3 de5 9.Bc4 Be6 10.Ne4 Nd7 11.0-0 0-0 ; D3) 6.Nf3 d6 (6...Qb6 7.e5 Ng4 8.d4 0-0 9.Nc3 d5 10.Ba3 Re8 11.Bd3 Be6; 6...0-0 7.Bd3 d5 8.e5 Nh5 9.0-0 Nd7 10.g3 Nc5 11.Nc3 Bh3) 7.Bd3 cb5 8.ab5 Nbd7 9.Nc3 Nc5 10.Qe2 0-0 11.0-0 a4.

5.Nf3 A) 5...Bg7 A1) 6.e3 d5 (6...0-0 7.Nc3 d5 8.Be2 Nbd7 9.d4 Nb6 10.0-0 Qc7 11.Ne5 Nfd7; 6...d6 7.Nc3 Nbd7 8.d4 Nd5 9.Bd3 0-0 10.Nd5 cd5 11.c4 dc4; 6...cb5 7.Bb5 0-0 8.Nc3 Nc6 9.0-0 d5 10.h3 Bf5 11.Nh4 Bd7) 7.Nc3 0-0 8.Be2 Nbd7 9.d4 Nb6 10.0-0 Qc7 11.Ne5 Nfd7; A2) 6.g3 d5 (6...0-0 7.Bg2 d5 8.0-0 Qb6 9.Nc3 d4 10.Nb1 Nd5 11.c3 d3; 6...cb5 7.ab5 0-0 8.Bg2 d5 9.0-0 Nbd7 10.Nc3 Nb6 11.d3 a4) 7.Bg2 0-0 8.0-0 Bg4 9.h3 Bf3 10.ef3 cb5 11.ab5 Nbd7; A3) 6.Nc3 d5 (6...d6 7.g3 0-0 8.Bg2 d5 9.d3 Nbd7 10.0-0 Nc5 11.bc6 bc6; 6...0-0 7.e3 d5 8.Be2 Nbd7 9.d4 Nb6 10.0-0 Qc7 11.Ne5 Nfd7) 7.e3 0-0 8.Be2 Nbd7 9.d4 Nb6 10.0-0 Qc7 11.Ne5 Nfd7; B) 5...d6 B1) 6.g3 Nbd7 (6...Bg7 7.Bg2 0-0 8.Nc3 d5 9.Qc1 Bg4 10.0-0 Nbd7 11.d3 Bf3; 6...Bh6 7.Nc3 Qb6 8.Bg2 Be6 9.0-0 0-0 10.e3 c5 11.h4 Bg4; 6...cb5 7.ab5 Nbd7 8.Bg2 Bh6 9.Nc3 Nc5 10.0-0 0-0 11.d4 Nce4; 6...d5 7.Bg2 Bg7 8.Bd4 Nbd7 9.bc6 bc6 10.0-0 c5 11.Bf6 Nf6; 6...Bg4 7.Nc3 Nbd7 8.Bg2 Qb6 9.Rb1 Bg7 10.bc6 bc6 11.Nd5 cd5) 7.Nc3 Nc5 8.d4 Nce4 9.Ne4 Ne4 10.d5 f6 11.dc6 bc6; B2) 6.Nc3 Bg7 (6...Nbd7 7.g3 Bg7 8.Bg2 0-0 9.0-0 Qc7 10.Rb1 Nc5 11.bc6 bc6; 6...Bh6 7.e3 Nbd7 8.Bc4 d5 9.Be2 0-0 10.0-0 Nc5 11.Rb1 Qc7) 7.g3 0-0 8.Bg2 d5 9.0-0 Nbd7 10.d4 cb5 11.Nb5 Ne4; B3) 6.e3 Bg7 (6...Nbd7 7.Nc3 Bg7 8.d4 0-0 9.Bd3 Nd5 10.Qd2 N7f6 11.0-0 Nb4; 6...Bh6 7.Bf6 ef6 8.Nc3 0-0 9.h4 Re8 10.h5 g5 11.Bd3 Bg4) 7.Nc3 Nbd7 8.d4 0-0 9.Bd3 Nd5 10.Qd2 N7f6 11.0-0 Nb4; B4) 6.Bf6 ef6 7.Nc3 Bg7 8.g3 0-0 9.Bg2 f5 10.0-0 Be6 11.e3 Bc4; B5) 6.Na3 Bg7 (6...Bh6 7.Nc4 0-0 8.e3 cb5 9.ab5 Nbd7 10.Be2 Nc5 11.0-0 Be6) 7.g3 Nbd7 8.Bg2 Qc7 9.0-0 0-0 10.d3 Nb6 11.c4 Be6; C) 5...cb5 6.ab5 (6.g4 h6 7.Nc3 b4 8.Nd5 Nc6 9.e3 Bg7 10.Bd3 0-0 11.Bf6 Bf6) 6...Bg7 (6...d5 7.c4 Bg7 8.e3 0-0 9.d4 Be6 10.Nbd2 Nbd7 11.Bd3 Nb6; 6...d6 7.Nc3 Nbd7 8.e3 Bg7 9.d4 0-0 10.Bd3 Nb6 11.0-0 a4) 7.Nc3 0-0 8.e3 d5 9.Bd3 Nbd7 10.Ba3 Nb6 11.0-0 Qc7; D) 5...d5 D1) 6.Nc3 Nbd7 (6...Bg7 7.e3 Nbd7 8.d4 0-0 9.Bd3 cb5 10.Nb5 Ne4 11.c3 Ndf6; 6...Bf5 7.e3 Nbd7 8.Nd4 Qc7 9.Nf5 gf5 10.Rb1 Rg8 11.g3 Rb8) 7.g4 Bg7 8.g5 Ne4 9.Bg2 cb5 10.ab5 0-0 11.Qc1 Bc3; D2) 6.e3 Bg7 (6...Nbd7 7.g4 h6 8.Nc3 Bg7 9.Rg1 Nc5 10.d4 Nce4 11.Ne5 Qd6) 7.Nc3 0-0 8.Bd3 Nbd7 9.Ba3 Ne4 10.Be4 de4 11.Ne4 cb5; D3) 6.h3 Bg7 7.e3 0-0 8.Nc3 Nbd7 9.Bd3 Nc5 10.0-0 Qc7 11.Qe2 Bd7; D4) 6.g3 Bg7 (6...Bh6 7.Bg2 0-0 8.0-0 cb5 9.ab5 Nbd7 10.Nc3 Nc5 11.Na4 Na4; 6...Bg4 7.Ne5 h5 8.Nd3 Qb6 9.Bg2 h4 10.Bf6 ef6 11.Nc3 hg3; 6...Nbd7 7.Bg2 Bg7 8.0-0 0-0 9.Nc3 Nc5 10.d4 Nce4 11.Ne5 Qc7) 7.Bg2 0-0 8.0-0 Bg4 9.h3 Bf3 10.ef3 cb5 11.ab5 Nbd7 ; D5) 6.c4 Nbd7 (6...Bg7 7.cd5 cd5 8.Bd4 0-0 9.Nc3 Bf5 10.d3 Nbd7 11.h3 Rc8; 6...Bh6 7.e3 0-0 8.Nc3 Nbd7 9.d4 Nb6 10.c5 Nc4 11.Bc4 dc4; 6...Bf5 7.Nd4 Nbd7 8.e3 Bg7 9.Nf5 gf5 10.Qc2 e6 11.Be2 0-0; 6...dc4 7.Na3 Bg7 8.Nc4 0-0 9.Qb3 Qd5 10.e3 Bg4 11.Be2 Nbd7) 7.Nc3 Nc5 8.d4 Nce4 9.bc6 bc6 10.Ne5 Bg7 11.Qb3 Ra6.

4.bc6 Nc6

5.Nf3 e6 6.e3 d5 7.Bb5 Bd7 8.0-0 Bd6 9.d3 0-0 10.Re1 Qe7 11.Nbd2 e5 12.Kh1 (12.Rb1 Rfc8=+) 12...Rac8 13.d4 (13.a3!?=+) 13...e4–/+ 14.Bc6 bc6 15.Ne5 Ne8 (15...Be5 16.de5 Ng4 17.Qe2–/+) 16.f4 (16.Nd7 Qd7 17.c4 Nf6=+) 16...Bf5 17.c4 (17...f6 18.Ng4–/+). purplepeace (2125) – lucperetti (1985), net–chess.com, 2005.

5.g3 d6 (5...e5 6.e3=+) 6.Bg2 (6.Bf6 ef6 7.Bg2 d5=) 6...e5=+ 7.Nf3 Be7 8.d3 0-0 9.Nbd2 Be6 10.0-0 Rc8 11.c4 d5 (11...h6!?=) 12.Ne5+= Ne5 13.Be5 dc4 14.Nc4 (14.Bb7 cd3 15.Bc8 Bc8 16.ed3 Qd3+–) 14...Bc4 (14...b5!? 15.Ne3 Nd7+=) 15.dc4+– Qd1 16.Rfd1 Rc4 17.Bb7 Ng4 18.Bf4 Bf6 (18...g5 19.Bd2 Rb8 20.Bd5+–) 19.Rac1+– Rb4 (19...Rc1!? 20.Rc1 Re8 21.e3+–) 20.Bf3 Ne5 21.Bd5 (21.Be5 Be5 22.Rc5 Rd4 23.Rd4 Bd4 24.Ra5 Rd8+–) 21...Ng6? (21...g5 22.Be5 Be5 23.Rc5+–) 22.Bd2 (better 22.Bd6!? Re8 23.Bb4 ab4+–) 22...Rb5 (22...Rb2 23.Ba5 Re2 24.Bb4+–) 23.Bc4 Rh5 24.Bd3 (24.e4 a4+–) 24...Ne5 (24...Rd5 25.Be3+–) 25.Bf4 (25.Be4 a4+–) 25...Ng4 (better 25...Nd3!? 26.Rd3 Re8+–) 26.h3! Ne5 (26...Rh3 27.Bf5 Decoy) 27.Kg2 Nd3 28.Rd3 Rf5 (28...Re8 29.a4 Be7 30.Rd7+–) 29.a4 h6? (29...Bg5 30.Bg5 Rg5 31.f4+–) 30.Be3 (better 30.e4!? Rf4 31.gf4 g6+–) 30...Bg5 (30...Re5!?+–) 31.f4+– Bf6?? (31...Bd8 32.Bd4 Rd5 33.Bg7 Rd3 34.Bf8+– (worse 34.ed3 Kg7 35.d4 Be7–/+)) 32.Rc5 (better 32.g4 Bb2 33.Rc2+–) 32...Rc5 33.Bc5 Rc8 34.Bb6 (34.Rd5 Bc3+–) 34...Bc3 (34...Rc4 35.Ba5 Ra4 36.Bc3+–) 35.Kf3 Bb4 36.Rd8 Rd8 37.Bd8 f5 (37...f6 38.g4+–) 38.Ke3 (38.g4 g6+–) 38...Kf7 39.Kd4 g6 40.e4 fe4 41.Ke4 Be1 42.g4 h5 (better 42...Bc3+–) 43.gh5 gh5 44.Ke5 Bc3 (44...Ke8 45.Bf6+–) 45.Kf5 Kg7 (45...Ke8 46.Bb6+–) 46.h4 (46.Ke6 Kf8+–) 46...Kh6 (46...Kf7+–) 47.Ke6 Kg7 48.f5 Kf8 (48...Bd4 49.Ba5 Kh6 50.f6+–) 49.f6 Ke8 (49...Bf6 50.Kf6 Ke8+–) 50.f7 Kd8 (50...Kf8 51.Be7 Kg7 52.f8Q Kh7 53.Qf5 Kg7 54.Qg5 Kh7 55.Kf7 Be5 56.Qh5) 51.f8Q+– Kc7 52.Qd6 Kb7 53.Kd7 Bb4 (53...Be5 54.Qc6 Kb8 55.Qb5 Ka7 56.Kc6 Bd4 57.Qb7) 54.Qc6 (54.Qc7 Ka6 55.Kc6 Bc5 56.Qb7) 54...Ka7 (54...Kb8 55.Qb5 Ka7 56.Kc6 Bc5 57.Qb7) 55.Kc7 (55.Kc8 Bc5 56.Qb7) 55...Bd6 56.Kd6 (56.Kd6 Kb8 57.Qb5 Kc8 58.Qd7 Kb8 59.Kc6 Ka8 60.Qb7; 56.Kc8 Be5 57.Qb7) 1–0. JUANKARODA (1810) – LuisMerloEvora (1735), lichess.org, 2020.

4.e3 cb5

5.Bb5 b6 6.Nf3 Ba6 7.Ba6 Na6 8.Bf6 ef6 9.0-0 d6 (9...d5 10.Qe2+=) 10.Qe2 Be7 (10...Nc7 11.e4+/–) 11.Qb5 Kf8 12.Nc3 Nc5 13.Nd5 g6 (13...Rb8 14.Nd4 Qe8 15.Qe2+–) 14.Nb6 Rb8 (14...Qe8 15.Rab1 Qb5 16.Rb5+–) 15.Rfb1 Ne4?? (15...Kg7+–) 16.Nd7 Qd7 (16...Kg7 17.Nb8 Qc7 18.Qc6 Qc6 19.Nc6+–) 17.Qd7 Rb1 (17...Re8 18.Rb5+–) 18.Rb1 Kg7 (18...Nc5 19.Qa7 Bd8 20.d4+–) 19.Qe7 Rc8 20.Rb7 d5 21.Qf7 Kh6 22.Qh7 1–0. kamret (2175) – twlssn03, GameColony.com, 2003.

5.Bb5 Nc6 6.Bc6 dc6= 7.Ne2 Qd5 8.Nf4 (8.0-0 Qg5=) 8...Qg5 9.Nc3 (9.h4!? Qf5 10.f3=+) 9...e5–/+ 10.h4 Qf5 11.Nfe2 Qg4 12.g3? (better 12.Ng3=+) 12...Qf3–+ 13.0-0 (13.Rf1 Bh3–+) 13...Bh3 14.Nf4 Qd1 15.Rfd1 (15.Rad1?? Bf1 16.Kf1 ef4 17.ef4 0-0-0–+) 15...ef4 16.ef4 0-0-0 17.d3 Bg4 18.Re1 Bc5 (18...b5 19.a4 b4 20.Nd1–+) 19.Re5 Bd6 (19...Bd4 20.Ra5 b6 21.Ra7–+) 20.Ra5 Kb8 (20...Rhe8 21.Kg2–+) 21.Na4 (21.Rg5 Bf8–/+) 21...Bc7 (better 21...b5!? 22.Rb1 Kb7–+) 22.Rg5–/+ Rhg8 23.Nc5 h6 24.Bf6 (24.Rg7 Rg7 25.Bf6 Rgg8 26.Bd8 Rd8–/+) 24...hg5 25.Bd8 Rd8 26.fg5 f6 (better 26...Bd6!? 27.Ne4 Ba3–/+) 27.Rb1 Attacking the backward pawn on b7 27...fg5 28.Rb7 (28.Rb4 Bd1 29.Nb7 Rd5 30.Nd8 Ka8 31.Ra4 Ra5 32.Ra5 Ba5 33.Nc6 Bc3=) 28...Kc8=+ 29.Ra7 (29.hg5? Bd6–+) 29...Bb6?? (29...gh4 30.Ra8 Bb8 31.gh4=) 30.Ra8?? (better 30.Rg7 Bc5 31.Rg5 Bf2 32.Kf2+–) 30...Kc7=+ 31.Na6 (31.Rd8 Kd8 32.Nb3 gh4 33.gh4 Ke7=+) 31...Kd7 (better 31...Kd6 32.Rd8 Bd8–+) 32.Nb8? (better 32.Rd8 Kd8 33.Nb4–/+) 32...Ke7?? (better 32...Kd6 33.Ra4 Bf3 (33...Rb8?! 34.Rg4 Rf8 35.d4–/+) 34.hg5 Rb8–+) 33.Nc6+– (33.Nc6 Ke8 34.Nd8 (34.Rd8?! Bd8 35.Nd8 Kd8+–) 34...Bd8 35.hg5+–) 1–0. Adjailton (1830) – weirdtactics (1810), lichess.org, 2016.

5.Bb5 Nc6 6.Nf3 e6 7.c4 (7.0-0 Be7 (7...d5 8.Ne5 Qc7 9.f4 Be7 10.Ng4 Qd8=) 8.Nc3 0-0 9.e4 d5 10.Qe2 Qc7=) 7...d5 (7...Be7 8.0-0 0-0 9.Qb3 Na7 10.Ba4 d5=) 8.Ne5 (8.Nc3 Bd6 (8...Be7+= 9.cd5 Nd5 10.Nd5 Qd5+=) 9.cd5 ed5 10.Na4 Be6=; 8.cd5 Nd5 9.0-0 f6 10.Nc3 Nc7+=) 8...Qb6 (8...Bd7 9.Nd7 Qd7 10.Bf6 (10.Nc3+= dc4=) 10...gf6+=) 9.Bd4 (9.Qa4 Nd7 (9...Bd7 10.Nd7 Nd7+/–) 10.cd5 (10.Nd7 Bd7 11.cd5 ed5+/–) 10...ed5+=) 9...Bc5+= (9...Qc7 10.cd5 Nd5+=) 10.Bc5 Qc5 11.d4 Qb4 12.Nd2 0-0 (12...Bd7 13.Rb1 Qd6 14.0-0+=) 13.Nc6+/– bc6 14.Bc6 Ra7 15.c5 Qb8 (15...Rc7 16.Rb1 Qa3 17.Qa4 Qa4 18.Ba4+–) 16.Qb3+– Qc7 17.Qb6 Bd7 (17...e5 18.Nf3+–) 18.Qc7 Rc7 19.Bd7 Nd7 20.Rb1 Rb8 (20...e5 21.f4 f6 22.0-0+–) 21.Ke2 Rcb7?? (better is 21...Kf8+–) 22.Rb7 Rb7 23.c6 Rc7 24.cd7 Rd7 25.Rc1 g6 26.Rc8 Kg7 27.Ra8 Rc7 28.Ra5 Rc1 29.a4 Rh1 30.Nf3 Rb1 31.Ra8 Rb2 32.Nd2 Rb4 33.Kd3 Kf6 34.Kc3 Rb7 35.Nb3 Rc7 36.Nc5 e5 37.a5 ed4 38.Kd4 h5 39.Kd5 Kf5 1–0. orane (2210) – PulveRIZER11, Live Game Caissa's Web, 2004.

5.Bb5 Nc6 6.Nf3 g6 A) 7.Nc3 d5 (7...d6 8.Rb1 Bg7 9.Nd5 e5 10.Nf6 Bf6+=) 8.Ne5 Qd6 9.Na4 Bg7 10.f4 Qc7=; B) 7.Bf6 ef6 8.Nc3+= (8.0-0 d5 9.Re1 Bd6 10.Nc3 Be6+=) 8...Bg7 9.0-0 0-0 10.Rb1 d6+/–.

3.Bb2 d5

4.a3 c5 (4...e6 5.Nf3=+) 5.e3 g6 (5...e6 6.Nf3=) 6.Bf6 ef6 7.d4 Bg7 (7...c4 8.Be2=) 8.dc5+= 0-0 9.Nf3 (9.Ne2 f5 10.c3 Be6+=) 9...f5 10.Nd4 (10.Ra2 Be6+=) 10...Qe7 (10...f4 11.Nc3=) 11.g3 (11.Nc3 Qc5 12.Na4 Qc7=) 11...Qc5 12.c3 (12.Bg2 Be6=) 12...Nd7 13.a4 Nb6 14.Be2 f4 (14...Be6 15.h4=) 15.gf4+= Bh3 16.Qb3 (16.Rg1 Rac8+=) 16...Nc4 (16...Rac8 17.Rg1=) 17.Bc4 (17.Rg1 Rac8+=) 17...dc4= 18.Qd1 (18.Qa3 Qc7=) 18...Bg2 (18...Rfe8 19.Kd2=) 19.Rg1 Be4 (19...Bd5 20.h4=) 20.Nd2 Bd3 21.Rg5 (21.Qg4 f5 22.Qh4 Bd4 23.ed4 Rae8 24.Kd1 Qd5=) 21...f5 22.h4 Rfe8 (22...Rae8 23.N2f3 Qd6 24.Kd2=) 23.N2f3 Qd5 (23...Qd6 24.Kd2 Re4+–) 24.h5+– Be4 (24...Re6!?+–) 25.Ne5 Be5 (25...Bf6 26.Rg3 g5 27.f3+–) 26.fe5+– (26.hg6 h6 27.Rg1 Bd4 28.cd4 Qd6–+) 26...Qe5 (26...Kf7 27.hg6 hg6 28.e6 Kf6 29.Rg3+–) 27.hg6 h6 28.Qh5 Kg7 29.Rf5 (better 29.f4!? Qf6 30.Rf5 Qg6 31.0-0-0+–) 29...Bf5+= 30.Nf5?? (better 30.Qf5 Re7 31.Ke2+=) 30...Kg8?? (better 30...Kf6 31.0-0-0 Qf5–+) 31.Nh6 (better 31.Rc1!? Rac8+–) 31...Kg7+– 32.Qe5 Re5 33.Ng4 (33.Nf7 Rd5 34.f4 Rd3+–) 33...Rd5 (33...Rg5!? 34.f3 Rd8+=) 34.Rd1+– Rad8 (34...Rg5 35.f3 Rf8 36.Ke2 Kg6 37.e4+–) 35.Rd5 (better 35.Rd4+–) 35...Rd5+– 36.f4 Kg6? (better 36...Rd3 37.Ke2 Rc3+–) 37.Ne5+– Kf5 (37...Re5 38.fe5 Kf5 39.Kf2 Ke5 40.Kf3+–) 38.Nc4 Rd3 (38...Rd7 39.Na5 Ke4 40.Kf2 Rd2 41.Kg3+–) 39.Ke2 (worse 39.Na5 Re3 40.Kd2 Re7+–) 39...Rc3 (39...Rd7 40.Na5 Ke4 41.Nb3+–) 40.Nd6 Ke6 41.Nb7 Ra3 42.Na5 Ra4 43.Nc6 Kd5 44.Kf3 Ra3 (44...Ra1 45.Nd4+–) 45.Nd4 1–0. FeegLood (2835) – AMADAN (2385), lichess.org, 2016.

4.a4 b6 5.e3 Bb7 6.c4 dc4 7.Nf3 e6 8.Bc4 Be7 9.0-0 Nbd7 10.d4 0-0 11.Nbd2 c6 12.Rc1 cb5 13.ab5 (13.Bb5 Rc8+=) 13...a4=+ 14.Ra1 a3 15.Bc3 Nd5 16.Qb3 (16.Bd5 Bd5 17.e4 Bb7=) 16...N7f6 17.Ne5 Qc7 18.Rfc1 Nc3 (18...Rfc8 19.Ra2=+) 19.Rc3= Qd6 20.Be2 Rfc8 (20...Nd5 21.Rc4=) 21.Ndc4 Qd5 Do you see the mate threat? 22.Bf3 Ne4 23.Qc2 (23.Be4 Qe4 24.f3 Qh4 25.Nb6 Rc3 26.Qc3 Rd8+–) 23...f5+= 24.Nc6 (24.Qb3!?+=) 24...Bc6= 25.bc6 (25.Nb6 Qb5 26.Nc8 Rc8 27.Be4 fe4 28.Rc1+–) 25...Rab8?? (better 25...Qc6!? 26.Be4 fe4–/+) 26.Ne5 (better 26.Nd2!? Nc3 27.Bd5 Nd5 28.Rc1+–) 26...b5= 27.Be4 fe4 28.c7 (better 28.Rca3 Ba3 29.Ra3+=) 28...Rb7–/+ 29.Rb1 b4 30.Rc4 h6 (30...Bd6 31.Qb3–+) 31.Qb3 Can b4 get defended? (better 31.Nc6!? Qd7 32.Ne5=+ (32.Nb4 Bb4 33.Rbb4 Rb4 34.Rb4 Qc7 35.Qc7 Rc7–+; 32.Qe4 Rcc7 33.Ne7 Qe7 34.Rc7 Rc7=+)) 31...Bd6 32.g3 (better 32.Nd7–+) 32...Kh8 (32...Rcc7 33.Rc7 Rc7 34.Qa4 Be5 35.de5–+) 33.Ra1? (33.Nf7 Kh7 34.Nd6 Qd6 35.Qc2 Rbc7 36.Qe4 g6 37.Rc7 Rc7 38.h4–/+) 33...Be5–+ 34.de5 Qe5?? (better 34...Rcc7 35.Rc7 A) 35...Rc7?! 36.Qb4 Kh7 A1) 37.Ra3?? Qd1 38.Kg2 Qf3 39.Kh3 Rf7–+ (39...Qf2?! 40.Qe4 g6 41.Ra1=); A2) 37.Qa3=; B) 35...Qb3 36.Rb7 a2–+) 35.Ra3= Rbc7 (35...ba3 Exploits the pin 36.Qb7) 36.Rc7 Qc7 37.Qb4 Qc1 (37...Rb8 38.Qa4=) 38.Kg2+= Qc6 39.Qe4?? (better 39.Ra7+=) 39…Qe4 (39...Qe4 40.f3 Rc2 41.Kf1 Qf3 42.Ke1 Qe2) 0–1. BeepBeepImAJeep (2555) – raastin (2385), lichess.org, 2017.

4.a4 c6 5.e3 cb5 6.ab5 b6 7.c4 Bb7 8.cd5 Nd5 9.Qg4 (9.Nf3 e6=) 9...Nf6 (9...Nd7 10.Nf3=+ (10.Bg7? Rg8–+)) 10.Bf6= ef6 11.Nc3 h5 12.Qg3 Bd6?? (better 12...h4 13.Qg4 Qd7=+) 13.Qg7+– Ke7 14.Bc4 Qf8 15.Qf8 Rf8 16.Nd5 (16.Bd5 Ra7+–) 16...Bd5 17.Bd5 Ra7 18.Nf3 Rd7 (18...Rd8 19.Bb3+–) 19.e4 (19.Be4 Ra7+–) 19...Bb4 (19...f5 20.d4+–) 20.0-0 (20.Nd4 Rfd8 21.Rc1 Rd5 22.ed5 Rd5+–) 20...Rg8 (20...f5 21.d4+–) 21.d3 (21.Rfd1 Rgd8+–) 21...Bd6 (21...Rd5 22.ed5 Rd8 23.Rfc1 Rd5 24.Kf1+–) 22.Rfc1 (22.Nd4 Kd8 23.Nf5 Rg5+–) 22...Rg4? (better 22...f5!?+–) 23.h3 Rg6 (23...Rf4 24.Rc8+–) 24.Bc6 (24.Rc8 f5+–) 24...Nc6 25.bc6 Rc7 26.Nd4 Bc5 (26...f5 27.ef5 Rf6 28.Nb5+–) 27.Nb5 (27.Nf5 Kd8+–) 27...Rc6 28.d4 Bd4 29.Rc6?? (better 29.Nd4 Rc1 30.Rc1+–) 29...Ba1+= 30.Rb6 Rg8 (better 30...Rg5!?+=) 31.Ra6+– Rd8 32.Ra5 Rd1 33.Kh2 Be5 (33...f5 34.ef5 Be5 35.g3+–) 34.g3+– Rd2 35.Kg2 Re2 36.Kf3 Rb2 37.Na7 Rb3 38.Kg2 Kf8 (better 38...Rb2!?+–) 39.Nc6 Bc3 (39...Kg7 40.Ne5 fe5 41.Re5+–) 40.Ra8 (40.Rh5!? Rb2+–) 40...Kg7 41.Ne7 Rb2 42.Nf5 Kg6 (42...Kh7 43.Rf8+–) 43.Rg8 (43.Rh8 Bd2+–) 43...Kh7 44.Rg7 Kh8 45.Rf7 Be1 46.Rf6 Bf2 (46...Rf2 47.Kg1+–) 47.Kf1 (47.Rh6 Kg8 48.Rh5 Bd4 49.Kf3 Rf2 50.Kg4 Re2+–) 47...Bc5 48.Rh6 Kg8 49.Rh5 Ra2 50.Rg5 Kf7 (50...Kf8 51.h4+–) 51.h4 (better 51.Nh6 Ke6 52.Rc5+–) 51...Kf6 52.g4 (52.Rg8!? Rf2 53.Ke1 Rh2+–) 52...Rf2 (52...Bf2 53.Rg7 Ke5 54.Rf7+–) 53.Ke1 Ra2 (53...Rf4 54.Rg8+–) 54.Rg7 (54.Rg8 Ke5+–) 54...Bb4 (54...Ke5 55.h5+–) 55.Kd1 Rd2 56.Kc1 Re2 57.Rg8 Re4 58.Ng3 (better 58.Kc2+–) 58...Rg4?? (58...Re3 59.Nh5 Kf7 60.Rg7 Kf8+–) 59.Rg4 Ke5 (59...Bf8+–) 60.Rb4 Kf6 61.h5 (61.h5 Kf7 62.Rb6 Ke7 63.Nf5 Kd7 64.Rd6 Kc8 65.h6 Kc7 66.h7 Kc8 67.h8Q Kb7 68.Qb2 Kc7 69.Qb6 Kc8 70.Rd8) 1–0. AleksandrNekhoroshik (1685) – ergu85 (1685), lichess.org, 2020.

4.c4 e6 5.Nf3=.

4.d3 c5 5.a4 g6 (5...e6 6.Nf3=) 6.e3 Bg7 7.Nd2 0-0 (7...Bg4 8.Be2 Be2 9.Ne2=) 8.Ngf3 Nbd7 9.g3 (9.Be2 Re8=) 9...Re8 10.Bg2 e5 11.0-0 Qc7 (11...e4 12.Ne1=) 12.Re1 (12.c4 e4 13.Ne1 Ne5 14.cd5 A) worse is 14...Nd3 15.Bf6 Ne1 16.Re1 Bf6 17.Ne4 (17.Be4?! Ba1 18.Qa1 Bg4=) 17...Ba1 18.Qa1 Re4 19.Be4+–; B) 14...Bg4+=) 12...b6 (12...Nb6 13.e4+=) 13.c3 (13.c4 e4 14.de4 de4=) 13...h6 (13...Bb7 14.e4=) 14.h3 (14.e4 Bb7=) 14...e4+= 15.de4 (15.Nh2 Bb7+=) 15...de4–/+ 16.Nh2 Bb7 17.c4 Rad8 18.Qc2 Qc8 (18...Ne5 19.Rad1–/+) 19.Rad1+= Ne5 20.Be5 Re5 21.f3 (21.Nb3 Ree8+=) 21...ef3 22.Nhf3 Re7 23.Nh4 Rde8 (23...Bg2 24.Kg2 Rde8 25.Qd3–/+) 24.Bb7 Qb7 25.Ng2 Qc7 26.Nf1 Ne4 (26...g5 27.g4–/+) 27.Nf4+= Re5 28.Rd5 (28.Qg2 Qb8+=) 28...Qb8 (28...g5 29.Re5 Qe5 30.Nd5+=) 29.Re5 (29.Rd7 Rg5 30.Kh2 Rf5+=) 29...Qe5–/+ 30.Kg2 (30.Rd1 Ng3 31.Ng3 Qe3 32.Qf2 Bd4 33.Rd4 cd4+=) 30...Qc3 (30...Qf5 31.Re2–/+) 31.Qc3 (better is 31.Re2!?+=) 31...Nc3–/+ (31...Bc3?! 32.Rd1=) 32.Ra1 Re4 (32...Re4 33.Rc1 Na4–/+ (worse is 33...Rc4 34.Nd5+=); 32...Nb5 33.Rb1 Na3 34.Rb6–/+) 0–1. Burbach – Kuhlmann, 1983.

4.d3 c6 5.bc6 Nc6 6.Nf3 +=.

4.d4 Bd7 5.e3= e6 (5...Bg4 6.Nf3=) 6.c4 (6.Nf3 c6=) 6...b6 (6...c6 7.Nf3=) 7.Nc3 (7.Nf3 Bb4 8.Nc3 Ne4=) 7...Bb4 (7...c6 8.Nf3=) 8.Bd3 (8.a3 Bd6=) 8...0-0 (8...dc4 9.Bc4 c6 10.bc6 Bc6 11.Nf3=) 9.Nge2 (9.cd5 Nd5 10.Qc2 h6=) 9...c6 (9...dc4 10.Bc4 c6 11.0-0=) 10.0-0 (10.cd5 Nd5 11.0-0 Qh4=) 10...Qe8 (10...dc4 11.Bc4 cb5 12.Bb5 Bb5 13.Nb5=) 11.bc6 (11.cd5 Nd5 12.bc6 Nc6 13.Nd5 ed5+=) 11...Bc6 (11...Nc6 12.cd5 ed5 13.Rc1+=) 12.cd5 Nd5 (12...ed5 13.a3 Bd6 14.Nf4+=) 13.Nd5+/– Bd5 14.Nf4 Bb7 (14...Bc6 15.Qg4 f5 16.Qg3+/–) 15.Qc2+/– g6 (15...h6 16.Qc7 Ba6 17.a3+/– (worse is 17.Qb6 g5+=)) 16.Bb5?? (better is 16.Qc7 Ba6 17.a3 (worse is 17.Qb6 g5+=) 17...Bd3 18.Nd3+/–) 16…Qb5–+ (16...Qb5 17.Qc7 Be4–+) 0–1. Deneuville,Christian – Wartig,Wolfgang, corr SOK–97–123, 1997.

4.d4 g6 5.e3 Bg7 6.a4 Nbd7 7.Nd2 0-0 (7...c5 8.bc6 bc6 9.c4=) 8.c4 b6 (8...c6 9.Ngf3=) 9.Qc2 dc4 10.Bc4 Bb7 11.f3 (11.e4 e6+=) 11...Ng4 (11...e6 12.Ne2=) 12.Nf1 (< 12.fg4 Bg2 13.Bd5 Bd5–/+) 12...Nh6 13.h4 Nf6 14.Nh3 (14.e4 e6=) 14...e6 15.Nf4 Re8 16.Ng3 (16.h5 g5 17.Nh3 Nd5=) 16...Rc8 (16...Nd5 17.Bd5 ed5 18.Qd3=+) 17.Qb3 (17.Nd3 Bd5=) 17...Nd5=+ 18.Bd5 ed5 19.Kf2 c5 (19...c6 20.bc6 Bc6 21.Rac1=+) 20.dc5= Rc5 21.Bg7 Kg7 22.h5 g5 23.Nfe2 Qf6–/+ 24.Rhc1 Ng4 25.Kg1 Ne3 26.Qd3 Qe5 27.Kf2 Rc4 28.h6 Kh6 29.Rc4 dc4?? 30.Rh1+– Kg7 31.Qh7 Kf8 32.Qh6 Ke7 33.Qb6 Ng4 34.fg4 Qd5 35.Nf5 Kd7 36.Qd4 Kc7 37.Qd5 Bd5 38.Nc3 Ba8 39.Ne3 Kd6 40.Rh6 Kc5 41.b6 Re6 42.Re6 fe6 43.Nb5 Be4 44.Nc4! 1–0. Roczniak,Jan – Szlapak,E, corr Poland, 1984.

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

4.Nf3 a4 5.e3 e6 6.a3 Bd6 7.c4 dc4 8.Bc4 Nbd7 9.Nc3 (9.d4 0-0=) 9...Nb6 10.Be2 0-0 11.0-0 Qe7 (11...e5 12.Qc2=) 12.d4+= Rd8 13.Qc2 Bd7 (13...Nfd5 14.Ne4+=) 14.e4 e5? (better is 14...Bf4!?+=) 15.de5+– Be5 16.Ne5 Qe5 17.Nd5 Qe4?? (17...Qg5 18.f4 Qh4 19.Nf6 gf6 20.Qc7 Nc4 21.Bc4 Rac8+–) 18.Nf6 gf6 19.Qe4 Re8 20.Qf3 Rad8 21.Qf6 (21...Re5 22.Bh5 Rf8 23.Be5 Bb5 24.Qg7) 1–0. Fredek (2090) – Mihajlo (1710), Freundschaftspartie, 5m + 0s, 2005.

4.Nf3 b6 5.e3 Bb7 6.c4 e6 7.Be2 Bd6 (7...dc4 8.Bc4 Bd6 9.Nc3=) 8.0-0 0-0 9.d4 Nbd7 10.a4 (10.Ne5 dc4 11.Bc4 Qe8=) 10...c6 (10...Rc8 11.Nbd2=) 11.Ne5 (11.bc6 Bc6 12.Ba3 Qc7=) 11...c5 (11...cb5 12.cb5 Rc8 13.Nd2=) 12.Nd2 (12.Nd7 Nd7 13.cd5 Bd5=) 12...cd4 13.ed4 (13.Nd7 Nd7 14.Bd4 Qc7=) 13...Rc8 14.Rc1 (14.Bf3 Ne4=). Makowski – Kozdra, Gdansk Poland, 1981.

4.Nf3 c6 5.a4 Nbd7 6.e3 e6 7.c4 Bb4 8.Be2 0-0 9.0-0 Nb6 10.d3 h6 11.Qc2 Nbd7 12.Nbd2 Qc7 13.d4 cb5 14.ab5 b6 15.Rfc1 Bb7 16.Qb3 Qd6 17.Rc2 Rac8 18.Rac1 Rfd8 19.Qa4 Ne4 20.Ne4 de4 21.Nd2 Qe7 22.Nb3 Bd6 23.c5 bc5 24.Qa5 Ra8 25.Qc3 cd4 26.Nd4 Ne5 27.Nc6 Bc6 28.bc6 Bc7 29.h3 f6 30.Ra1 ½–½. AlexSh – Caissa, playchess.de, 2004.

4.Nf3 Nbd7 5.e3 e6 (--> 3.Nf3 e6 4.Bb2 d5 5.e3 Nbd7).

4.Nf3 e6 5.d3 Nbd7 6.Nbd2 Be7 7.g3 0-0 8.Bg2 Nb6 9.a4 Nfd7 10.0-0 f5 11.c4 Bf6 12.Bf6 Qf6 13.Qc2 Qe7 14.Rfc1 dc4 15.Nc4 Nd5 16.Ne3 N7f6 17.Nd5 Nd5 18.Ne5 Qd6 19.Nc4 Nb4 20.Qc3 Qe7 21.Ne5 c6 22.bc6 bc6 23.Nc6 Nc6 24.Bc6 Bb7 25.Bb7 Qb7 26.Qe5 Qd5 27.Qd5 ed5 28.Rc5 Rfe8 29.Kf1 Red8 30.Rb1 Ra6 31.Rbb5 Rh6 32.h4 f4 33.Rd5 Rf8 34.Rf5 1–0. Valenta,Vit – Koudela,J, Valtice, 1992.

4.Nf3 g6 5.e3 Bg7 6.c4 0-0 7.Nc3 c5 8.bc6 dc4 (8...Nc6!? 9.Nd5 Nd5 10.Bg7 Ne3 11.fe3 Kg7+=) 9.cb7+/– Bb7 10.Bc4 Nc6 11.0-0 e6 12.Rb1 Ba6 13.Ba6 Ra6 14.Qe2 Rb6 15.d4 Nb4 16.a3 Nbd5 17.Ba1 (17.Na4 Rb8+–) 17...Nc3 18.Bc3 Nd5?? (better is 18...Rc6 19.Rfc1 Ne4+–) 19.Ba5+– Qd6 20.Rb6 Nb6 21.Bb4 Qc6 22.Bf8 Bf8 23.Ne5 Qa4 24.Qf3 Qa7 25.h3 Bd6 26.Qc6 (26.Qc6 Be5 27.de5+–) 1–0. Humeau,Cyril (2095) – David,Pierre Yves (1920), Pic d'Anie op 1st, 2004.

4.a4 c5

5.e3 b6 6.c4 e6 7.Nf3 Bb7 8.Be2 Nbd7 9.0-0 Be7 (9...Bd6 10.cd5 Bd5 11.Nc3=) 10.d4 (10.cd5 Bd5 11.Qc2 Rc8=) 10...Rc8 11.Nbd2 0-0 12.Rc1 Re8 13.h3 Bf8 14.Qb3 (14.dc5 Nc5 15.cd5 Bd5=) 14...g6 (14...cd4 15.ed4 Bb4 16.Ba3=) 15.Rfd1 Bg7 16.dc5 Nc5 17.Qa2 Qe7 18.cd5 Nd5 19.Bg7 Kg7 20.Nc4 Qc7 21.Nd4 Red8 22.Qa1 (better 22.Nb3 Nb3 23.Qb3+=) 22...f6?? (better 22...e5 23.Nd2 Qe7=) 23.Na5!+– ba5 Theme: Deflection from c5 24.Rc5! Qc5?? Decoy theme: c5 (better 24...Qb6 25.Rc8 Rc8+–) 25.Ne6 A double attack 25...Kf7 26.Nc5 Rc5 27.e4 Nc3 (27...Nf4 28.Bg4 Rd1 29.Qd1 Re5+–) 28.Rd8 Ne2 29.Kh2 Rc7 (29...Nc3 30.Rd7 Ke6 31.Rb7 g5 32.Rb6 Kf7+–) 30.Qa2 Kg7 31.Qe2 (better 31.Qg8!? Kh6+–) 31...f5 32.b6 (32.b6 Re7 33.Qb2 Kh6 34.ef5+–) 1–0. BeepBeepImAJeep (2485) – angusss (2130), lichess.org, 2015.

5.Nf3 e6 6.e3 Bd6 7.Be2 Qe7 8.d3 Nbd7 9.Nbd2 Nb6 10.0-0 Bd7 (10...e5 11.c4 d4 12.Ng5=) 11.Re1 (11.Ne5!?+–) 11...0-0 12.Nf1 (12.Ne5 Be8+=) 12...e5= 13.Ng3 Bg4 (13...e4 14.Nd2=) 14.h3 Bf3 15.Bf3 e4 (15...g6=) 16.Be2 (better 16.Bf6!? Qf6 17.de4+–) 16...Bg3=+ 17.fg3 Rfd8 (17...ed3 18.Bd3 Rfe8 19.Kh2=+) 18.Rf1 (18.d4 Rac8=) 18...Nbd7 (18...ed3 19.Bd3 Rd6 20.Qd2=+) 19.Bf6 (19.d4!?+=) 19...Nf6=+ 20.d4 cd4 21.Qd4 Ne8 (21...Qc7 22.g4=+) 22.Rf4 (22.c3 Nc7=) 22...Rac8=+ 23.c3 (23.Rd1=+) 23...Rc7 (23...Qc5–/+) 24.Bg4?? (better 24.Raf1 Nd6 25.Rd1+=) 24...Rc4–/+ 25.Qd2 (25.Qa7 Rc3 26.Rd1 Nf6–+) 25...Qc5–+ 26.Raf1 (26.Rc1 Ra4 27.c4 Rb4–/+) 26...Nd6 (26...Nf6 27.Rc1 Ra4 28.c4–+) 27.Qf2 Rf8?? (27...h6 28.Rf7 Nf7 29.Qf7 Kh8 30.Kh2=+) 28.Rc1?? (better 28.Be6! Qc7 29.Bd5 Rc3 30.Be4+=) 28...Ra4 (better 28...Re8 29.Bd1 Rc3 30.Rc3 Qc3 31.Kh2–+) 29.Bd7? (better 29.Be6 Ra2! 30.Qa2 Qe3 31.Kh2 Qc1 32.Qd5–/+) 29...Ra3 30.Qd2 (30.Be6 Rc3 31.Rc3 Qc3 32.Bd5 Qd3–+) 30...Qc7 (30...a4!? 31.Bg4–+) 31.Bg4 Qc5 32.Qb2?? (32.Bd7 a4 33.Bg4–+) 32...Qe3–+ 33.Rf2 (33.Kh2 Nc4 34.Qc2 g6–+) 33...Nc4 34.Qe2 (34.Qc2–+) 34...Qc1 35.Rf1 Qc3 36.Qf2 Ne5 (better 36...a4 37.Kh1–+) 37.Be2 f5 (37...Ra2 38.Rd1–+) 38.Kh2 d4 (better 38...Ra2!? 39.Rd1 Qc2 40.Rd5–+) 39.Qf4 d3 40.Rc1 Qd4 41.Bf1 Ra1 (41...Ra2 42.Be2 de2 43.h4 Nf3 44.Kh3 Qf2 45.Qe4 e1Q 46.Qf3 Qf3 47.gf3 Qe2 48.Rc2 Rc2 49.b6 Qf1) 42.Ra1 Qa1 43.Qe3 Qc3 (43...Qf1 44.Qd4 Nf3 45.gf3 Qe2 46.Kh1 ef3 47.Qg1 d2 48.b6 d1Q 49.g4 Qg2) 44.Qb6 d2 45.Be2 Qb3 46.Qd6 Nd3 47.Qd7 d1Q 48.Bd1 Qd1 49.Qb7 Nf2 50.g4 (50.Qd5 Qd5 51.Kg1 e3 52.Kh2 Qd1 53.g4 f4 54.b6 Qh1) 50...Qh1 (50...f4 51.Qd5 Qd5 52.g3 e3 53.gf4 Qh1 54.Kg3 Qh3) 51.Kg3 Qe1 52.Qd5 Kh8 53.Kh4 (53.gf5 Qe3 54.Kh2 Qf4 55.Kg1 Rc8 56.Qg8 Kg8 57.g3 Rc1 58.Kg2 Qf3 59.Kh2 Rh1) 53...Nd3 (53...Nh1 54.Kh5 g6 55.Kg5 Qe3 56.Kh4 Qh6) 54.g3 fg4 55.hg4 (55.b6 Nf4 56.Qd6 Ng2 57.Kh5 g6 58.Qg6 Qg3 59.Qg4 Rf5 60.Kh6 Qd6 61.Qg6 Qg6) 55...Qh1 56.Kg5 h6 (56...h6 57.Kg6 Rf6; 56...Qh6) 0–1. hj1121 (1880) – Amun (1865), lichess.org, 2018.

4.a4 Nbd7

5.d4 e6 6.Nf3 Bb4 7.c3 Bd6 8.Nbd2 (8.Ba3 e5=) 8...0-0 9.e3 Qe7 (9...e5 10.de5 Ne5 11.c4=) 10.c4= dc4 (10...c5 11.bc6 bc6 12.Rb1=) 11.Bc4 e5 12.de5 Ne5 (12...Be5? 13.Ne5 Ne5 14.Ba3+–) 13.0-0 Nc4 14.Nc4 Bb4 15.Nd4 Rd8 16.Qf3 Rd5 17.Qf4 Ne4 18.Rfd1 h5 Black is in command 19.h3 g5 20.Qh2 Rc5 21.Rac1 Be6 22.Ne6 Qe6 23.Rd4 h4 24.g3 hg3 25.fg3 Re8 26.h4 Nc3! 27.Bc3 Theme: Interference (27.Rc3 Bc3) 27...Rc4 Annihilates a defender: c4 28.Qd2 (28.Bd2 Rc1 29.Bc1 Bc5–/+) 28...Bc5 29.Ba5 Rc1 30.Qc1 Qe3 31.Qe3 Re3 32.Rc4 Rc3 (32...Rg3?! 33.Kf1 b6 34.Bb4 Rg1 35.Ke2 Bb4 36.Rb4 gh4 37.Rh4=+) 33.Rc5 Rc5 34.Be1 (34.hg5 Rc4–+) 34...gh4 35.gh4 Rc2 (35...Rc1 36.Kf2–+) 36.a5 (36.Kf1 f5–+) 36...Ra2 37.Bc3 Kh7 38.Kf1 Kg6 39.Kg1 (39.Be1 Kh5–+) 39...Kh5 40.Be1 Kg4 41.Kf1 f5 42.b6 (42.Kg1 Rb2–+) 42…c6 (42...c6 43.Kg1 f4–+) 0–1. onur604 (2320) – mastermind100 (2340), lichess.org, 2020.

5.e3 e5 6.c4 Bd6 7.Nf3 dc4 8.Bc4 0-0 9.0-0 Qe7 10.d4 ed4 11.Nd4 Ne5 12.Be2 Bd7 13.Nd2 b6 (13...c5 14.bc6 bc6 15.Qc2=) 14.N2f3 Rad8 15.Rc1 Bg4 16.h3 (16.Qc2 Nf3 17.Bf3 Bf3 18.Nf3 Rd7+=) 16...Bf3 (16...Nf3!? 17.Bf3 Qe5=) 17.Bf3+= Nf3 18.Qf3 (worse 18.Nf3 Bh2 19.Nh2 Rd1 20.Rfd1 Ne8=+) 18...Be5?? (better 18...Qe5 19.g3 Rd7+=) 19.Nc6+– Qe6 20.Be5 Rd2 21.Bf6 gf6 (21...Qf6 22.Qf6 gf6 23.Rfd1+–) 22.Nd4 Qe5 23.Rc6 (23.Qb7 Ra2+–) 23...Kh8 (23...Ra2 24.Qg4 Qg5 25.Qd1+–) 24.Qf6 (24.Rfc1 Ra2+–) 24...Qf6 25.Rf6 Rc2 (25...Kg7 26.Rc6+–) 26.Rc6 (better 26.Nc2 h5 27.Nd4+–) 26...Rb2 (26...Rc6 27.Nc6 Kg7 28.Rd1+–) 27.Rc7 Ra2 28.Rc4 (28.Rfc1 Ra4 29.R1c6 Ra1 30.Kh2 a4 31.Rb6 Ra2+–) 28...Rd8 29.Rfc1 Rd5 30.R1c2 Ra1 31.Rc1 (better 31.Kh2+–) 31...Kg7?? (31...Ra2 32.Rc6 Ra4 33.Rb6 Kg7+–) 32.Ra1+– (32.Ra1 Rd8 33.Rc6+–) 1–0. BeepBeepImAJeep (2725) – bja555 (2440), lichess.org, 2019.

4.a4 e5

5.e3 Bd6 6.c4 dc4 7.Bc4 0-0 8.Nf3 Re8 (8...e4 9.Nd4=+) 9.d4= ed4 10.Nd4 Nbd7 11.Nd2 Ne5 12.Be2 Bg4 13.0-0 Be2 14.Qe2 Nd5 15.Nc4 (15.Rfd1 Rc8+=) 15...Nc4= 16.Qc4 Qf6?? (better 16...Qh4 17.h3 Rad8=) 17.Qd5+– Rad8 18.Qf3 Qg6 (18...Qf3 19.Nf3 Rd7 20.Bc3+–) 19.g3 (19.Qb7 Qh5 20.g3 Be5+–) 19...h5 (19...Qe4 20.Qe4 Re4 21.Rfd1+–) 20.Nf5 (20.Qb7!? Be5 21.Rab1 Rd7+–) 20...Be5 21.Be5 Re5 22.Nh4 Qe6 (22...Qe4 23.Rfd1 Rd1 24.Rd1 Qf3 25.Nf3+–) 23.Rad1 (better 23.Qb7!? Qb6 24.Qf3 Rdd5+–) 23...Rd1 24.Rd1 b6 (24...c6+–) 25.Qa8 Kh7 26.Qd8 (26.Rd8 g6 27.Rh8 Kg7 28.Rg8 Kf6 29.Qf3 Rf5 30.Nf5 Qf5 31.Qc6 Qe6 32.Qc7 h4 33.Qf4 Qf5 34.Qh4 Qg5 35.Qh8 Ke6+–) 26...Rc5 27.Qd3 g6 28.Nf3 Qg4 (28...Qa2 29.Qe4 Qe2 30.Rf1+–) 29.Kg2 (better 29.e4 Qe6+–) 29...Rf5 (29...Qa4 30.Qd8 Rf5+–) 30.Nd4 (30.e4!? Rc5+–) 30...Rd5 31.h3 Qd7 32.Qc4 (32.e4 Re5+–) 32...Kg8 33.Rc1 (33.e4 Rd6+–) 33...Kh7 (33...Rc5 34.Qf1 Qd5 35.Kg1 Kh7+–) 34.Qc7 (34.Qc7 Rd6 35.Rc6 Qc7 36.Rc7+–) 1–0. BeepBeepImAJeep (2540) – JORJUEMA (2020), lichess.org, 2018.

5.e3 Bd6 6.Nf3 Nbd7 7.d4 0-0?? (better 7...e4 8.Nfd2 0-0=+) 8.de5+– (8.Ne5?! Re8=) 8...Bb4 (8...Ne5 9.Be5 Be5 10.Ne5+–) 9.c3 Ne4 (9...Bc5 10.ef6 Nf6 11.Bd3+–) 10.cb4 ab4 11.Bd3 Ndc5 12.0-0 Bg4 13.Be2 h6 14.Nbd2 Nc3 (14...Nd2 15.Qd2 (worse 15.Nd2 Be2 16.Qe2 Na4+–) 15...Nb3 16.Qb4 Bf3 17.Bf3 (17.gf3?! Na1 18.Ra1 Re8+–; 17.Qb3?! Be2 18.Rfc1 Bc4+–) 17...Na1 18.Ra1+–) 15.Qe1 (better 15.Bc3 bc3 16.Nb1+–) 15...Ra4 16.Nd4?? (better 16.Rc1 N5e4 17.Bc3 Nc3 18.Nb1 Ne2 19.Qe2+–) 16...Ra1–/+ 17.Ba1 White gets deadly initiative 17...Ne2?? (better 17...Be2 18.Bc3 Bf1 (18...bc3?! 19.Qe2 cd2 20.Qd2=) 19.Bb4 Nd3–/+) 18.Ne2+– Nd3 19.Qd1 Re8 (19...Qg5!?+–) 20.Nf3 Nc5 21.Qd4 Bf3 22.gf3 Nb3 23.Qb4 Na1 24.Ra1 Re5 25.f4 Re4 26.Qd2 Qh4? (26...Re8+–) 27.Ng3 (27.Qd5!? Re8 28.Qb7 Qh5+–) 27...Rb4 (27...Re8 28.Qd5 c6+–) 28.Qb4 (28.Qb4 Qd8 29.Qd4+–) 1–0. BeepBeepImAJeep (2685) – DaniyarMedybayev (2425), lichess.org, 2020.

4.c4 dc4

5.e3 c6 6.a4 (6.Bc4 cb5 7.Bb5 Bd7 8.Bd7 Nbd7 (worse 8...Kd7 9.Qb3 Ke8 10.Bf6 gf6 11.Qb7+–; 8...Nfd7?! 9.Nf3=; 8...Qd7?! 9.Nf3=) 9.Bf6 Nf6=) 6...cb5 7.ab5 Be6 8.Nf3 g6 (8...Nbd7 9.Na3=+) 9.Na3= Bg7 10.Bc4 Bc4 11.Nc4 0-0 12.0-0 Nbd7 13.d4 b6 14.Nce5 Rc8? (better 14...Ne5 15.Ne5 Qd5+=) 15.Nc6+– Qe8 16.Ba3 Rc6 (better 16...Kh8 17.Ne7 Ra8+–) 17.bc6 Nb8 18.c7 Na6 19.Rc1 Qd7 (19...Qa8 20.Qb3 Rc8 21.Qb6 Ne8+–) 20.Ne5 Qe6 21.Rc6 Qf5 22.Qc2 (22.Qb3 Ng4 23.Ng4 Qg4 24.Be7 Re8 25.Qb6 Nc7 26.Rc7 Qe4+–) 22...Rc8? (22...Qc2 23.Rc2 Rc8 24.Be7+–) 23.Qf5 (better 23.Qc4 Ng4 24.Qa6 Ne5 25.de5 Be5+–) 23...gf5 24.Rfc1 Nd5 25.Nd7 Rc7 26.Rc7 Ndc7 (26...Nac7 27.Nb6! h6 28.Be7+–) 27.Nb6 (better 27.Be7 f4 28.Bd6 (worse 28.Nb6 fe3 29.fe3 f5+–) 28...fe3 29.fe3+– (29.Rc7 Nc7 30.fe3 Nb5=+)) 27...Nb5 (27...f4+–) 28.Be7 (better 28.Rc8 Bf8 29.Be7+–) 28...a4 (28...h6+–) 29.Rc8 (29.Rc8 Bf8 30.Na4+–) 1–0. BeepBeepImAJeep (2535) – DoruAdryan (2330), lichess.org, 2017.

5.Nf3 Qd5 6.Nc3 Qc5 7.a4 Nbd7 8.Ba3 (8.e3 Nb6=) 8...Qh5=+ 9.Bb2 (9.e3!? Nb6 10.Be2=+) 9...Nc5–/+ 10.d4 cd3! 11.ed3 Bg4 12.Be2 Qg6 13.0-0 Bh3 14.Nh4 Qg5 15.d4 0-0-0 (15...Ne6 16.Bf3 0-0-0 17.Bb7 Kb8 18.Bf3 Qh4 19.gh3–/+) 16.g3 Bf1 17.Bf1 Ne6 18.Bc1 (18.Nf3 Qf5 19.b6=+) 18...Qg4–+ 19.Qg4 Ng4 20.d5 (20.Bh3 Rd4 21.Nf3 Rc4 22.Bg4 Rg4–+ (22...Rc3 23.Ng5 Rc4 24.Bh3+=)) 20...Nc5 21.Bh3 h5 22.Bg4?? (better 22.f3 Nb3 23.Rb1 Nc1 24.fg4–+) 22...hg4–+ 23.Be3 (23.Ba3 e6 24.de6 Ne6 25.Bf8 Rhf8–+) 23…e6 0–1. fishmooney – pcmvr, net–chess.com, 2019.

5.Nf3 Qd5 6.Nc3 Qc5 7.e4 Bg4 8.Rc1 e6 9.d4 White gets strong initiative 9...Qb4 10.Qd2 Bf3 11.gf3 Nh5 12.a3 Qb3 13.Rb1 Bb4 (13...Ba3? 14.Bc1 Bb4 15.Rb3 cb3 16.Qd3+–) 14.Qc1 0-0 15.Rg1 Nd7 16.ab4 ab4 17.Nd1 (17.Ne2!? Ra2 18.f4+–) 17...Qf3+= 18.Qe3 Qe3 19.Ne3 c3 20.Bc1 e5 21.Rb4 ed4 22.Rd4 Ne5 23.Be2 Ra1 24.Bh5 Rc1 25.Rd1 Nd3 26.Kf1 Rd1 27.Bd1 (27.Nd1?? c2 28.Ke2 c1Q (28...cd1N 29.Kd3 Rd8 30.Kc2 Nf2 31.Bf7 Kf7 32.Rf1–+) 29.Kd3 Rd8 30.Ke2 Qb1–+) 27...Ra8 28.Rg5 c6 29.Nc2 Re8 30.Rg3 (30.bc6 bc6 31.Rg3 Nb2+–) 30...Nb2 (30...Nc5 31.Rc3 Ne4 32.Rd3 cb5 33.Bf3+–) 31.Be2+– Na4 32.f3 Rd8 33.bc6 bc6 34.Rg5 Rd2 35.Ra5 Threatening mate... how? 35...Kf8 36.Ra4 Rc2 37.Rc4 (37.Rc4 Ke8 38.Bd1+–) 1–0. martijn – pcmvr, net–chess.com, 2020.

4.d4 a4

5.e3 c5 6.dc5+= e6 7.Nf3 (7.Bd4 Ne4+=) 7...Bc5= 8.c4 0-0 9.a3 Nbd7 10.cd5 Nd5 11.Bc4 N7f6 12.0-0 Bd7 13.Nbd2 Qb6 14.Qe2 Rfc8 15.Ne5 Be8 16.Rfd1 (16.Rac1 Nc7=) 16...Bd6 (16...Nc7 17.Rab1+=) 17.Ndf3 (17.Ng4+=) 17...Be5 (better 17...Ra5!?=) 18.Ne5+– Ne7 19.Bd3 Ng6 (19...Ned5 20.Bd4 Qd6 21.Qf3+–) 20.Bd4 Qc7 21.Ng6 hg6 22.Qb2 Qe7 23.Be2 Rd8 24.Bf3 Rab8 25.h3 b6 26.Rab1 Bd7 (26...Nd7 27.Bg7 Rbc8 28.Bc3+–) 27.Be5 Rbc8 28.Bb7 Ne8? (better 28...Rc4+–) 29.Bc8 Rc8 30.Qd4 Bb5 (30...Rc5 31.Qd7 Qd7 32.Rd7 Re5+–) 31.Rb5 Qa3 (31...f6 32.Bg3 e5 33.Qa4+–) 32.Qd7 Ra8 33.Qc6 Qf8 (33...Nc7 34.Bd6 Qa2 35.Bc7 Rc8+–) 34.Qa8 Nf6 35.Rd8 Qd8 36.Qd8 Kh7 37.Bf6 (37.Bf6 a3 38.Rb6 a2 39.Rb8 a1Q 40.Ba1 g5 41.Qg5 e5 42.Qh5) 1–0. Vendelo – Nnd, internet, 2020.

5.e3 Bf5 6.c4 e6 7.Bd3 Bd3 8.Qd3 dc4 9.Qc4 Qd5 10.Qc7 (10.Qd5 Nd5 11.Ba3 c6=) 10...Bb4 (10...Qb5?? 11.Qc8 Ke7 12.Ba3 Qb4 13.Bb4; 10...Qg2?? 11.Qc8 Ke7 12.Ba3) 11.Bc3 Bd6 (better is 11...Nbd7 12.Bb4 Qg2–+) 12.Qc8+= Ke7 13.Qh8 Qg2 14.Ke2 Ne4 15.Be1 Qh1 16.Nf3 (16.Qh7 Ng5 (worse is 16...Qg1 17.Qe4 Nd7 18.Nc3+=; 16...Bh2? 17.Bb4 Kf6 18.Qh4 Ng5 19.Nd2+–) 17.Qh4 Qg1+=) 16...a3?? (better is 16...Nf6+/–) 17.Qc8+– (17.Qg7?! Nd7+/–; 17.Qh7? Qf3!? 18.Kf3 Ng5 19.Kg2 Nh7–+) 17...Qg2 (17...Ra7 18.b6 Ra6 19.Qb7 Ke8+–) 18.Qb7 Kf6 (18...Kd8 19.Qa8 Ng5 20.Ba5 Ke8 21.Nbd2 Nf3 22.Nf3+–) 19.Qa8 Qg4 (19...Ng5 20.Ba5 Nf3 21.Bd8 Be7 22.Be7 Ke7 23.Qf3+–) 20.Na3 Bh2 (20...Qf5 21.Rc1 Ba3 22.Qb8+–) 21.Nc4 Bg1 (21...Kg6+–) 22.Qb8 (better is 22.Nce5 Qf5 23.Qb8+–) 22...h5 23.Nce5 Qh3 24.Qd8 Kf5 25.Nh4 Qh4 26.Qh4 (26.Qh4 Bh2 27.Qh2 Nc3 28.Bc3 Kf6 29.Qf4 Ke7 30.Qf7 Kd6 31.Qd7) 1–0. Fournier,Frederic (2105) – condevict (1930), Active, 2002.

4.d4 Bg4

5.Nf3 =+.

5.h3 Bf5 6.e3 e6 7.Nd2 Ne4 8.Ne4 Be4 9.Nf3 Bb4 10.c3 Bd6 11.Nd2 Bf5 12.c4 Bb4 13.Rc1 c6 14.a3 Be7 15.Qf3 0-0 16.cd5 cd5 17.e4 Bg6 18.Be2 Bg5 19.ed5 ed5 20.Rc5 Bd2 21.Kd2 Be4 22.Qg3 Re8 23.Rc7 b6 24.Rhc1 Nd7 25.Bh5 Re7 26.Qd6 Qe8 27.Re1 g6 28.Bg4 f5 29.Bd1 Rf7 30.Bb3 Nf6 31.Rf7 Qf7 32.f3 a4 33.Ba2 Rc8 34.fe4 fe4 35.Rf1 Kg7 36.Rf6! Qf6 37.Qd7 Kh6 38.Qc8 Qf2 39.Kc3 e3 40.Bc1 Qa2 41.Be3 Kg7 42.Qb7 Kg8 43.Qa8 Kf7 44.Qa4 Qg2 45.Qa7 Kg8 46.Qb6 Qh3 47.Qd8 Kg7 48.Qe7 Kg8 49.b6 Qh1 50.b7 Qe1 51.Kb3 Qb1 52.Ka4 Qc2 53.Ka5 1–0. Glowatzky,Tihomir – Wartig,Wolfgang, email SOK–99–134, 1999.

4.e3 a4

5.a3 c6 (5...e6 6.Nf3=) 6.c4 Kd7 (6...dc4!? 7.Bc4 Bd7=) 7.Nf3 (7.bc6 bc6 8.Bf6 gf6 9.cd5 cd5 10.Bb5 Kd6 11.Nc3+–) 7...g6? (7...Ke8!?+=) 8.Nc3 (better 8.bc6 bc6 9.cd5+–) 8...Na6?? (8...Ke8 9.bc6 bc6 10.cd5 cd5 11.Rc1+–) 9.Na2 (better 9.ba6!? Ra6 10.cd5 Ra5+–) 9...Qb6?? (better 9...cb5 10.cd5 Nc7+–) 10.Nc3 (10.Bf6 ef6 11.ba6 Qb3 12.cd5 cd5+–) 10...Ke8?? (10...Qd8 11.ba6 Ra6 12.cd5 Ra5+–) 11.Bc1 (11.Na4 Qa5 12.Bc3 Qd8 13.ba6 ba6 14.cd5 cd5+–) 11...h6?? (11...Nc5+–) 12.Ne2 (12.ba6!? Qa6 13.cd5 Qa5 14.dc6 bc6+–) 12...c5?? (12...cb5 13.cd5 Nd5 14.Bb2=) 13.Ned4?? (better 13.ba6 Ra6 14.Nc3+–) better 13...Bd7–+ (13...Nc7!? 14.Nc2 Bg7=+) 14.Nb3?? (better 14.ba6 cd4 15.Nd4 Qa6 16.cd5+=) 1–0. Pierre – Orampo, internet, 2020.

5.c4 e6 6.a3 Bd6 7.Nf3 Nbd7 8.d4 c5 9.bc6 bc6 10.Nbd2 c5 11.cd5 ed5 (11...Nd5 12.Nc4 Bc7 13.e4+=) 12.dc5 Nc5 13.Bb5 The isolani on a4 becomes a target 13...Bd7 14.Bd7 Qd7 15.Bf6 Nd3 16.Ke2 gf6 17.Nd4 (worse 17.Kd3 Qb5 18.Nc4 dc4 19.Kc3 0-0=+) 17...Ne5 18.f4 Nc6 19.N2f3 0-0 20.Nc6 Qc6 21.Nd4 Qd7 22.Qd3 Qg4 23.Kf2 Rfb8 24.Rhb1 (24.Ra2 Qg6 25.Nf5 Ra5+–) 24...Bc5 25.h3 Qg6 (25...Qd7 26.Kf1+=) 26.Nf5 Re8 27.Kf1 (27.Qd5?? Rad8 28.Rd1 Rd5 29.Rd5 Bb6–+) 27...Rac8 (27...Rad8!?+=) 28.Rc1+– Bf8 (28...h5 29.Rc3 Bf8 30.Rac1+–) 29.g4 (29.Rc8 Rc8 30.g4 h5+–) 29...Rc1 (29...h5 30.Rc8 Rc8+–) 30.Rc1+– h5 31.Kf2 Rb8 (31...hg4?? 32.Rg1 Ba3 33.Rg4 (33.Qa3?! Qf5 34.Rg4 Kh7 35.Qa4 Rc8=) 33...Qg4 34.hg4+–) 32.Kg3 Qh7 33.Qc3 Re8 (33...d4 34.Qd4 (34.Nd4?! hg4 35.hg4 Qe4+–; 34.ed4? hg4 35.hg4 Rb3–+) 34...hg4 35.hg4 Ba3 36.Qf6+–) 34.Qc6 Rb8 35.Qf6 (35.Qa4?! hg4 36.hg4 Rb2+–) 35...h4 36.Kf3 Qg6 37.Qh4 Ba3 (37...d4 38.Ne7 Be7 39.Qe7+–) 38.Ra1 Bf8 39.Ra4 Qe6 (39...Qb6 40.Qg5 Kh7 41.Ra1+–) 40.Ra7 Re8 41.Qg5 Kh8 42.Kg2 Qe4 (42...Rb8 43.Kf2 Re8 44.Kf1+–) 43.Kh2 Qe6 44.Ra5 Qc6 (44...Qg6 45.Rd5 Qg5 46.fg5+–) 45.Rd5! (45.Rd5 Qg6 46.Qh4 Kg8 47.Rd8 Rd8 48.Qd8+–) 1–0. marekt (2125) – manijer_wmp3 (2165), gameknot.com, 2015.

5.c4 e6 6.cd5 Nd5 (6...ed5 7.Nf3=) 7.Nf3 Nd7 (7...a3 8.Bd4=) 8.Bd3 (8.Na3 Nc5=) 8...h6 (8...Bd6 9.Na3=) 9.0-0+= N7f6 (9...Bd6 10.Bg7 Rg8 11.Bc3+–) 10.Bc2 (10.Bd4 Nb4 11.Bc4 c5+=) 10...a3 (10...Bd7 11.Na3=) 11.Bd4+= Be7 (11...Bd7 12.Bd3+=) 12.Nc3 0-0 13.Ne5 Bd7 14.Nd5 Nd5 15.Rb1 b6 (15...Bd6 16.Qg4 f5 17.Qg3+–) 16.Qg4+– Nf6 (16...f5 17.Qg3 Bh4 18.Qf3+–) 17.Qg3 Ra5 (17...Be8+–) 18.Nd7 (18.Bd3!?+–) 18...Qd7+– 19.Bc3 Ra7 20.f4 c6 (20...Qd5!?+=) 21.bc6+– Qc6 22.Rfc1 Rc8 23.Bf6 (23.Bf6 Bf6 24.Bh7 Kh7 25.Rc6 Rc6 26.Qf3+–) 1–0. GuestYJNH – GuestSNVP, freechess.org, 2019.

5.Nf3 e6 6.a3 Nbd7 7.c4 dc4 8.Bc4 Nb6 9.Be2 Bd6 10.Qc2 0-0 (10...Bd7 11.e4 Nh5 12.g3=) 11.e4 Nh5 12.e5 Be7 13.g3 f6 14.Ng1 g6 15.f4 Bd7 16.Nf3 c6 17.ef6 Bf6 18.Ne5 cb5 19.Nc3 (19.Bh5!? gh5 20.Qe4+=) 19...Be5+= 20.fe5 Nc4 21.Ne4 Nb2 22.Qb2 Bc6 23.d3 Be4 24.de4 Nf4 (24...Nf4 25.gf4 Qh4 26.Kd1 Qf2–+) 0–1. Sternik,Ryszard (1935) – Pilz,Erhard (2125), Tiger Temat, 2005.

5.Nf3 Bf5 6.Be2 Nbd7 7.0-0 h6 8.d4 e6 9.c4 Be7 10.c5 c6 (10...Ne4 11.a3=) 11.b6 0-0 12.a3 Bb1 (12...Ne4 13.Nc3+=) 13.Rb1+– Ne4 14.Bd3 f5 15.Bc2 f4 16.Ba4 fe3 (16...fe3 17.fe3 Ndc5 18.dc5 Bc5=). craig4000 – mizuzul, ChessWorld.net, 2020.

4.e3 b6

5.Nf3 Bb7 6.c4 e6 7.cd5 ed5 (7...Nd5 8.Nc3=) 8.Be2 (8.Nd4 Bc5=) 8...Be7 (8...Bd6 9.0-0=) 9.0-0 0-0 10.d4 Nbd7 11.Nc3 Re8 12.Ne5 Ne4 (12...Bd6 13.Nc6 Bc6 14.bc6+=) 13.Ne4+= de4 14.Qb3 (14.Bc4 Ne5 15.de5 Qd1 16.Rad1 c5+=) 14...Ne5= 15.de5 Bd5 16.Qc2 (16.Qa4 c6=) 16...Be6 1–0. GuestYWBR – GuestYLDS, freechess.org, 2019.

5.Nf3 Nbd7 6.c4 dc4 (6...Bb7 7.Nc3=) 7.Bc4+= Bb7 8.0-0 e6 9.d3 Bd6 10.Nbd2 e5 (10...0-0 11.Rc1=) 11.Qc2 (11.Rc1 0-0+=) 11...0-0 12.Rac1 (12.d4 Qe7+=) 12...Re8 (12...Qe7 13.Rfd1+=) 13.Ng5 (13.Rfd1 Qe7+=) 13...Rf8 (13...Bd5 14.Nde4 Bc4 15.Qc4+=) 14.a4 (14.Rfd1 a4+=) 14...Qe7 15.Nge4 (15.Nde4 Rac8+=) 15...Ne4 16.Ne4 Be4 (16...Rac8 17.f4+=) 17.de4= Nf6 (17...Rad8 18.Bd5+=) 18.Rcd1 Rad8 19.f3 (19.Bc3 Bb4 20.Bb4 Qb4+=) 19...Nd7 (19...Rd7 20.Rd3+=) 20.Rd5 Nf6 21.Rd3 Bc5 22.Rfd1 Rd6 23.Kf1 (23.Qe2 Rfd8+=) 23...Rfd8 24.Rd6 (24.Qc3 Rd3 25.Rd3 Nd7+=) 24...Rd6 (24...cd6 25.Qd3+=) 25.Rd6 Qd6 26.Qd3 Kf8 (26...Nd7 27.Qb3 Qg6 28.Kg1+=) 27.Qd6 (27.Qb3 Qe7+=) 27...cd6 (27...Bd6 28.Ke2=) 28.Ke2+= Ne8 (28...Bb4 29.Bd3+=) 29.Kd3 (29.f4 Nf6 30.Kf3 Nd7+=) 29...h6 (29...Nf6 30.Bd5+=) 30.f4 ef4 (30...Nf6 31.h3+=) 31.ef4+/– f6 (31...Nc7 32.f5+/–) 32.Bc3 Ke7 33.g3 g5 34.Ke2 Ng7 35.f5 Nh5 36.Kf3 Ng7 37.Bd5 h5 38.h3 Ba3 39.Bd4 Bc5 40.Bb2 Ne8 41.Bb7 Nc7 42.Bc6 Kf8?? 43.Bf6+– g4 44.hg4 hg4 45.Kg4 Kf7 46.Bd8 (46.Bd8 Ne8 47.Kf4+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

4.e3 c5

5.a4 Nbd7 6.c4 dc4 7.Bc4 e6 8.Nf3 Nb6 9.Be2 Be7 10.0-0 0-0 11.d4 cd4 12.Nd4 (12.Bd4!? Nbd5 13.Nbd2+=) 12...e5= 13.Nf3 e4 14.Nd4 Nfd7 (14...Qd5 15.f4=) 15.Nd2 Nc5 16.Ba3 Re8 17.Qc2 Nca4 (17...Nba4!? 18.Ne4 Ne4 19.Be7 Qe7 20.Ra4 Nc5=) 18.Be7+– Qe7 19.Ra4 Na4 20.Qa4 f5 (20...Qg5!? 21.Rc1 Bh3+–) 21.Nc4+– Kh8 22.Nb6 (22.Na5 b6=+) 22...Rb8 23.Qa5 Be6 24.Na4?? (24.Ra1 Qc7+–) 24...Rbc8?? (24...Ra8 25.Qe1 Ra4–+) 25.Nc3 Qc5 26.Ne6 (26.Rc1 Bf7 27.Qa4 Red8+–) 26...Re6 27.Nb1 (27.Rd1 Rd6 28.Rd6 Qd6+–) 27...Qc2 28.Qd2 Qd2 29.Nd2 Rc2 30.Bc4?? (better 30.Nb3 Rd6 31.Ra1+–) 30...Rd6–/+ 31.Ra1 (31.Ne4 fe4 32.Ra1 g5–+) 31...Rcd2–+ 32.Bf1 (32.f3 b6–+) 32...Rd1 (32...g5 33.Ra7 Rd7 34.f3–+) 33.Ra8 Rd8 34.Ra7? (34.Rd8 Rd8 35.f3 h5–+) 34...h6 (34...Rc8!? 35.g4 fg4 36.Kg2–+) 35.g3 Rb1 36.Kg2 Rd7 (36...Rdd1 37.Bc4 g5 38.Kh3–+) 37.Be2 (37.Ra2 Rc1–+) 37...Kh7 (37...Rb2 38.Bf1–+) 38.h4? (better 38.Ra2–+) 38...Rb2 39.Bh5 (39.Bc4 Rdd2 40.Be6 Rf2 41.Kg1 Rg2 42.Kf1 Kg6–+) 39...Rdd2 (39...Rb5?! 40.Be8 Rbd5 41.Bd7 Rd7 42.Ra5–/+) 40.Kh3 (40.Be8 Rf2 41.Kg1 Rg2 42.Kf1–+) 40...Rf2 41.g4 (41.Bg6 Kg6 42.Ra6 ba6 43.h5 Kg5 44.ba6 Rh2) 41…Rf3 0–1. BeepBeepImAJeep (2765) – MaksimPanov (2410), lichess.org, 2019.

5.c4 b6 6.cd5 (6.Bf6 ef6 7.Qf3 Ra7+=) 6...Nd5 7.Bc4 Bb7 8.Nh3 (8.Nf3 e6+=) 8...e6= 9.Qh5 (9.0-0 Qh4 10.d4 Bd6=) 9...Nf6 10.Qh4 (better 10.Qg5!?=) 10...Bg2–/+ 11.Rg1 Bh3 12.Qh3 Nbd7 13.f4 g6 14.Nc3 Bg7 15.Ne4 (15.Qf3 a4=+) 15...0-0 16.Ng5 (better 16.d3=+) 16...h6 (better 16...a4!?–/+) 17.Nf7 (17.Ne6 fe6 18.Be6 Rf7 19.Rg6 Kf8+–) 17...Rf7= 18.Qe6 Qe7?? (better 18...Qe8 19.Rg6 Qe6 20.Be6 Re8+=) 19.Qe7+– (19.Qe7 Raf8 20.Rg6+–) 1–0. FeegLood (2705) – matetechnique (2300), lichess.org, 2016.

5.c4 d4 6.Nf3 de3 7.fe3 b6 8.Be2 Bb7 9.0-0 e6 10.Qc2 (10.Ng5 Nbd7+=) 10...Bd6= 11.h3 Bf3 (11...Nbd7!?=) 12.Bf3+= (12.gf3?! Rg8=) 12...Ra7 13.Bf6 gf6 14.Nc3 Bc7 15.Ne4 (15.d3 Be5+=) 15...f5 (15...Be5!? 16.Rad1 f5+=) 16.Qc3+/– Rf8 17.Nf6 Ke7 18.Nh7 Qd6? (better is 18...Rh8 19.Qf6 Kd6+/–) 19.Qf6 Ke8 20.Nf8 (20.Qg7 Qh2 21.Kf2 Bd6+–) 20...Kf8 (20...Qh2 21.Kf2 Qg3 22.Ke2+–) 21.Qh6 Ke7 22.Qf4! Qf4 23.ef4 Bf4 24.d3 Be3 25.Kh1 Nd7 26.Bc6 (26.Rae1 Bd4 27.h4+/–) 26...Nf6? (better is 26...Ne5!? 27.Rad1 f4+/–) 27.Rae1 f4 28.Rf3 e5 29.Ree3 fe3 30.Re3 Kd6 31.Rf3 Ke6 32.g4 Rc7 33.g5 Nh5 34.Bd5 Kd6 35.Rf7 Rf7 36.Bf7 Nf4 37.g6 Ke7+= 38.h4 Nd3 39.h5+– Kf6 40.h6 Nf4 41.h7 Kg7 42.Kg1 e4 43.Kf2 Nh3 44.Ke3 Ng5 45.a4 Kh8 46.Kf4 Kg7 47.Kg5 e3 48.h8Q! Kh8 49.Kh6 e2 50.g7 1–0. orangutanb4 (1960) – violin (1975), kurnik, 2011.

5.Be2 Nbd7 6.Nf3 Qc7 7.c4 b6 (7...e5 8.cd5 Nd5 9.Qb3=) 8.cd5+= Bb7 9.Nc3 Nd5 10.Nd5 Bd5 11.0-0 e5 12.d4 ed4 (12...cd4!? 13.a3 Bd6=) 13.ed4+= 0-0-0 14.a4 (14.Rc1 Bd6+=) 14...f6 (14...Bd6 15.g3 Be7 16.Rc1+=) 15.Rc1+= Kb8 (15...Bd6 16.h3+=) 16.Re1 (16.Bc4 Be4+–) 16...Bd6+= 17.g3 Qb7 18.Nd2 Rhe8 19.Bg4 Re1 20.Qe1 cd4 21.Bd4 Ne5 22.Be5 Be5 23.Qe3 Bd6 24.Qd3 Bb4 25.Nf1 Rh8 (25...Qe7 26.Rd1 Kc7 27.Qh7+=) 26.Rd1+– Be4 (26...h5 27.Qd5 Qd5 28.Rd5 hg4 29.Ne3+–) 27.Qe3 f5 28.Bf5! Bh1?? (28...Bf5 29.Qf4 Double attack (29.Qf4 Decoy)) 29.Qe5+– Ka8 30.Ne3 Bf3 (30...Rf8 31.Rd7 (31.Bh7?! Bc5 32.Rd2 Bb4+–) 31...Qf3 32.Qg7+–) 31.Rd3 (31.Rd7 Qc8 32.Be4 Be4 33.Qe4 Kb8 34.Qf4 Ka8 35.Rg7 Rf8 36.Qe4 Kb8 37.Qe5 Ka8+–) 31...h5 (31...Qe7 32.Qf4 Bb7+–) 32.Rd7 Qb8 (32...Rc8 33.Rb7 Rc1 34.Nf1 Kb7 35.Qg7 Rc7+–) 33.Qe4!! Be4 34.Be4 Qb7 35.Bb7 (35.Rb7 Rh6 36.Rb6 Ka7 37.Rb7 Ka8 38.b6 Rb6 39.Rb6 Ka7 40.Rb7 Ka8 41.Bc6 Be7 42.Nd5 Bd8 43.Rd7 Kb8 44.Rd8 Ka7 45.Ra8) 35...Kb8 36.Bc6 h4 (36...Rh6 37.Nd5 Rd6 38.Rg7 Rd5 39.Bd5+–) 37.Rb7 Kc8 38.Nd5 hg3 39.Ra7 gh2 (39...gf2 40.Kf1 Bd6 41.Nb6 Kd8 42.Nd5 Kc8 43.Ra8 Bb8 44.b6 Rh2 45.b7 Kd8 46.Rb8) 40.Kh1 Bd6 41.Nb6 Kd8 42.Nd5 Kc8 43.b6 Rh5 (43...Bb8 44.Ra8 g6 45.b7 Kd8 46.Rb8) 44.Ra8 Bb8 45.b7 (45.b7 Kd8 46.Rb8) 1–0. Panza (2645) – babyl (1890), ChessWorld.net, 2016.

5.Nf3 Nbd7 6.c4 Qc7 7.Qc2 e5 (7...e6 8.Be2=) 8.cd5+= Nd5 9.Nc3 Nb4 10.Qb3 (10.Qb1 Qd6 11.e4+/–) 10...b6?? (10...c4 A) worse is 11.Bc4 Nc5 12.b6 Qe7 (12...Nb3?! 13.bc7 Na1 14.Ba1=) 13.Bf7 Kd8+=; B) 11.Qc4 Nc2 12.Kd1 Qc4 13.Bc4 Na1 14.Ba1=) 11.Nd5 (11.Bc4 f5 12.a3+=) 11...Nd5+= 12.Qd5 Bb7 13.Qb3 Bf3 14.gf3 Be7 15.Bh3 0-0 16.Rg1 Bf6 17.Bf5 g6 18.Be4 Rad8 19.0-0-0 c4 20.Qc2 Bg7 21.h4 f5 22.Bc6+= Nb8 23.Qc4 Kh8 24.h5 Nc6 25.Qc6 Qe7 26.Kb1+/– Rd6? 27.Qc3?? gh5? 28.Rg7! Qg7 29.Qe5+– Qe5 30.Be5 Rff6 31.Rg1 Rde6 32.f4 Re5 33.fe5 Rg6 34.Rh1 Rg2 35.Kc2 Rf2 36.Rh5 Kg7 37.e6 Kf6 38.Rh7 Ke6 39.Rh6 Kd5 40.Rb6 Kc5 41.Rb8 f4 42.Kc3 fe3+/– 43.de3 Ra2 44.b6 Ra3 45.Kd2 Rb3 46.b7 Kc6 47.Ra8 Kb7 48.Ra5 Kb6 49.Rf5 Kc6 50.Ke2 Kd6 51.Kf3 Ke6 52.Ra5 Rb1 53.Ke4 Rb4 54.Kf3 Rb2 55.Kf4+/– Rf2 56.Ke4 Kd6 57.Ra6+– Kd7 58.Kd4 Rd2 59.Ke5 Rb2 60.e4 Ke8 61.Ra7 Rb8 62.Kf6 Rb6 63.Kf5 Rb8 64.e5 Kf8? 65.Kf6 Ke8 66.Rh7 Rb1 67.Rh8 Kd7 68.e6 Kc7 69.Rh7 Kd6? 70.Rd7 Kc6 71.Rd2 Rf1 72.Ke7 Re1 73.Kf7 1–0. orangutanb4 (1975) – violin (1960), kurnik, 2011.

5.Nf3 Bg4 6.h3 Bh5 7.c4 e6 8.Be2 Nbd7 9.Nc3 Nb6 10.Ne5 Be2=+ 11.Qe2 Bd6 12.f4 Be5 13.fe5 Nc4 14.ef6 Nb2 15.0-0 Nc4 16.e4 Nb6 17.fg7 Rg8 18.Qg4 de4 +–. Schiffler – Hellbauer, Berlin, 1951.

4.e3 Nbd7

5.a4 Nc5 6.c4 dc4=+ 7.Nc3 Bg4 8.f3 Be6 9.h3 Qd6 10.f4 Nd3 11.Bd3 cd3 12.Nf3 h6 13.0-0 Bf5 14.Ne5 c5 15.Qf3=+ Rb8 16.Nc4 Qd8 17.b6 e6= 18.Nb5 Ne4 19.Nc7 Ke7 20.Rfd1 Bg6 21.Na5 Rg8 22.Nc4 Nd6 23.Ne5 Be4= 24.Qg3 f6 25.Ng6 Kf7 26.Nh4 g5 27.fg5 Rg5=+ 28.Qf2 Bg7 29.Bc3 Bc6 30.Qf4 c4 31.Rf1= Be4 32.Nf3+= Bf3 33.Rf3 Rc8 34.e4 Kg8? 35.Raf1 e5 36.Qe3 Qd7 37.Qc5 Kh7 38.Qd5 Rg8 39.a5 Bh8+= 40.R3f2?? Bg7 41.Bb4+– Bf8 42.g4?? f5?? 43.ef5 h5 44.Ne6 hg4 45.h4 Rh5 46.Ng5 Rgg5 47.hg5 g3 48.Rg2 Rg5 49.Bc3 Rf5 50.Rf5+– Qf5 51.Rg3 Kh6? 52.Qh1 Qh5 53.Rh3 Qh3 54.Qh3 Kg6 55.Qf3 Bg7 56.Kg2 Kg5 57.Bb4 Nf5 58.Qb7 Nh4 (58...Kf4 59.a6 Bf8 60.Bf8 Ne3 61.de3 Kg5 62.Qg7 Kf5 63.Qh7 Kf6 64.b7 e4 65.Qg7 Ke6 66.b8Q c3 67.Qbe5#) 1–0. NN – GrandMasterChess 80286, 1993.

5.a4 e5 6.c4 =+.

5.c4 dc4 6.Bc4= Nb6 7.Qb3 Nc4=+ 8.Qc4 b6 9.Nf3= Bb7 10.Nc3 e6 11.a4 Bd6 12.0-0-0? Rc8–/+ 13.e4 Bb4 14.e5 Nd5 15.Rhe1 c6–+ 16.Kb1 cb5 17.Qb5 Bc6 18.Qe2 0-0 19.Nd4 Be8 20.Ndb5 Nf4 21.Qe4 Nd3 22.Re2 Nb2 23.Kb2 Bc3 24.Nc3 Bc6 25.Qg4 Qe7 26.f3 Rfd8 27.h4 (27.Rb1 Qc5 28.Rc1 b5–+). Wartig,Wolfgang – Alegre Gonzalez,Manuel, corr ICCF, 1992.

5.d4 Nb6 6.Bd3 =.

5.d4 c5 6.dc5 Nc5 7.Bf6 (7.Nf3 Bg4=) 7...ef6 8.c4 (8.Nf3 Ne4=) 8...dc4 (8...Be6 9.cd5 Qd5 10.Qd5 Bd5 11.Nf3+=) 9.Qd8= Kd8 10.Bc4 Be6 11.Nd2 Kc7 (11...Rc8 12.Ngf3=) 12.a4 (12.Ngf3 Rc8=) 12...b6 (12...Bd6 13.Ngf3=) 13.Ngf3 Rd8 14.0-0 (14.Nd4 Bd6=) 14...h6 (14...Bd6 15.Rfd1=) 15.Rfc1 (15.Nd4 Bd6+=) 15...g5 (15...Kb7 16.Nd4=) 16.Be6 (16.Nd4 Kb7+=) 16...fe6= 17.Nd4 Kb7 18.Rc5?? (better is 18.N2b3 Nb3 19.Nb3=) 18...Bc5–+ (18...bc5?! 19.N4b3=) 19.N2b3 Bd4 20.Nd4 e5 21.Nc6 Rd6 22.Kf1 Rh7 23.Ke2 Rhd7 24.Ra2 Rd1 25.f4 e4 26.Nd4 gf4?? 27.Kd1= fe3 28.Ke2 Rd4 29.Ke3 Rc4 30.Kf4 (30.Kf4 Kc7 31.Kf5–/+; 30.g4!?=). Trkn – marco_amaral, itsyourturn.com, 2001.

5.Nf3 Nb6 6.a4 (6.Be2 e6=) 6...Bf5 (6...Bg4 7.h3 Bh5 8.Bd3=) 7.d3 (7.Be2 e6=) 7...e6 8.Nbd2 (8.Be2 Bd6=) 8...Nfd7 9.h3 (9.Ra2 Nc5=) 9…Nc5+= (9...Nc5 10.Bd4 Nca4+=). de Visser,Arno – van Rooijen,Peter, corr or01–004, 2001.

5.Nf3 Ne4 =.

5.Nf3 e6 6.Be2 =.

5.Nf3 g6 6.c4 Bg7 7.Be2 dc4 8.Bc4 0-0 9.0-0 Nb6 10.Be2 Bf5 11.d3 Qd7 12.Qc2 Qb5 13.Nd4 (13.Nc3 Qa6=) 13...Qa4 14.Qa4 (14.Qc1!?=+) 14...Na4–/+ 15.Ba3 (15.Nf5 gf5 (15...Nb2?! 16.Ne7 Kh8 17.Nc3=) 16.Be5 Nd5 17.Bg7 Kg7–/+) 15...Nd5–+ 16.Nd2 (16.Rc1 Rfd8–+) 16...Ndc3 17.Bf3 Bd3 18.Rfc1 (18.Bb7 Ra7 19.Bc6 Bf1 20.Kf1–+) 18...e5 19.N4b3 e4 20.Bd1 (20.Bf8 Kf8 21.Bd1–+) 20...Rfd8 21.Nf1 (21.f3 b5 22.Be7 Re8–+) 21...b5 22.Nc5 (22.Bc5 Nc5 23.Nc5 Bc4–+) 22...Nd1 23.Rd1 Nc3 0–1. samyaksamadhi – pcmvr, net–chess.com, 2019.

5.f4 e6 6.Nf3 Be7 7.Be2 0-0 8.0-0 a4 =.

5.f4 e6 6.Nf3 Be7 7.Be2 0-0 8.0-0 c6 9.c4 cb5 10.cb5 Ne4 11.d3 Bf6 12.Qc2 Bb2 13.Qb2 Qf6 14.Ne5 Nec5 15.Qd4 Qe7 16.Nd2 Ne5 17.fe5 b6 18.Rf3 f5 19.ef6 Rf6 20.Raf1 Rf3 21.Nf3 Bd7 22.Ne5 Rf8 23.Rf8+= Qf8 24.Bg4 Bb5=+ 25.Be6 Ne6–/+ 26.Qd5 Qe8 27.Qd6 Nd8 28.d4 Nf7–+ 29.Qd5 Kf8 30.Qf3 Qe6 31.Qf2 g6 32.e4 Kg7 33.Nf7 Qf7 34.e5 Qf2 35.Kf2 Bc4 36.a3 Kf7 37.Ke3 Ke6 38.Kd2 a4 39.g4 g5 40.Kc3 b5 0–1. Mroz,Antoni – Solenik,Mikolaj, corr Poland, 1984.

5.f4 e6 6.Nf3 Be7 7.Be2 0-0 8.d3 c6=+ 9.bc6 bc6 10.h3 Ba6 11.Nbd2 Rb8 12.Rb1 a4 13.0-0 Qa5 14.Nd4 Qc7 15.Qe1 c5 16.N4f3 c4 17.dc4= dc4 18.Be5? Ne5–+ 19.Ne5 Bb4 20.Qc1? c3 21.Ndc4 Ne4 22.Bd3–/+ Nd2 23.Rb4 Rb4 24.Nd2 cd2 25.Qd2 Bd3 26.cd3 Rfb8 27.Nc4 Rb1 28.Qc2 Rf1 29.Kf1 Qc6 30.Qd1 h6 31.Kf2 a3 32.Qe2 Qc5 33.g3 Rb1 34.Qd2?? Ra1 35.Qc2 Qd5 36.e4 Qc5 37.Kf3 Rf1 38.Kg4 h5 39.Kh4 Qe7 40.Kh5 g6 (41.Kh6 f6 42.Kg6 Qf7 43.Kh6 Qh7#) 0–1. Larsen,A – Wibe,Terje, Hamar, 1976.

5.Nf3 Nc5

6.c4.

6.Be2 Bf5 =.

6.Bf6?! ef6

7.Nc3 Be6 =.

7.c4 dc4 8.Bc4 Nd3 9.Bd3 Qd3 10.Nc3 =+.

7.c4 Be6 8.d4!? Ne4 9.c5 (9.Nbd2? Bb4) 9...b6 10.c6 Bg4! 11.a3 unclear.

7.c4 Be6 8.cd5= Qd5 9.Nc3 (9.Nd4 Ne4=) 9...Nd3+= 10.Bd3 Qd3 11.Qa4 (11.Nd4 Bd6+=) 11...Bb4 12.Rc1 Bc4 13.Nd4 0-0-0 14.Qd1?? (14.Kd1 Bd5 15.f3 Bc3 16.Rc3 Qb1 17.Rc1 Qa2 18.Qa2 Ba2 19.b6=) 14...Rd4–+ 15.f3 (15.Qc2 Qc2 16.Rc2 Rg4–+) 15...Re8 16.e4 (16.Qc2 Re3! 17.Kd1 Bc3 18.Qd3 Red3–+) 16...Rde4! 17.fe4 Re4! 18.Ne4 (18.Qe2 Re2 19.Kf1 Qf5 20.Kg1 Qf2) 18...Qe3 A double attack (18...Qe3 19.Qe2 Qe2) 0–1. Stummerer,Alfred – Algaba,Pedro, corr SOK–90–66, 1990.

7.d3 (idea Nbd2 idea c4).

4.e3 e6

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

5.Nf3 (--> 3.Nf3 e6 4.Bb2 d5 5.e3).

4.e3 Bf5

5.Bd3 Bd3=+ 6.cd3 Nbd7 (6...e6 7.Nf3=) 7.Nf3= e6 8.0-0 Bd6 9.a4 (9.Nc3 0-0=+) 9...0-0 10.Nc3 c6 11.bc6 bc6 12.Qc2 Qc7 13.Ne2 Rab8=+ 14.Rac1 c5 15.Ng3 Rfd8 16.Bf6 Nf6–/+ 17.d4 c4 18.Rb1 h6 19.Rb5 Rb5 20.ab5 Rb8 21.Rb1–/+ Bb4 22.Ra1 Rb5–/+ 23.Ne5 Bd6–+ 24.f4 Qb6 25.Qa4 Rb2 26.Qa5 Qa5 27.Ra5 Rd2 28.Ra8 Bf8 29.Rc8 g5 30.fg5 hg5–+ 31.h3 Rc2 32.Nf1 Rc1 33.g4 Rc2 34.Rb8 Nh7 35.Ng3 Ra2 36.Rc8 f6 37.Nf3 Kf7 38.Rc7 Be7 39.Kf1 Nf8 40.Nh5 Ng6 41.Ke1 e5 42.Rb7 ed4 43.ed4 Ra3 44.Ke2–/+ Rd3 45.Rb5 Nh4 46.Nh4 gh4 47.Nf4 Rd4 48.Nd5 Rd3 49.Ne3 Ra3 50.Rh5=+ Ra2 51.Kf3 c3 52.Rh8 Ke6–/+ 53.Rc8 Rh2 54.Rc3 Rh3 55.Kf4 Bd6 56.Ke4 Rg3 57.Rc6 Kd7 58.Ra6? Bc5 59.Nf5 Rg4 60.Kd5 Rf4 61.Rf6 Bf2 62.Ke5 Rf3 63.Rf7 Kd8 64.Rf8 Kc7–/+ 65.Rf7 Kb6 66.Ke4 Rc3 67.Ne7 Re3–/+ 68.Kf4 Rd3 69.Ke4 Rd4 70.Kf3 Bg3 71.Nf5 Rf4 72.Kg2 Bf2 73.Kh3 Kc5 74.Rf8 Kb4 75.Rf7 Kc3 76.Rc7 Kd3 77.Rd7 Ke2 78.Re7 Kf3 79.Ng7 Rf6 80.Rd7 Ke4 81.Re7–/+ Kd5 82.Nh5 Rf5 83.Kg4 Rf8 84.Nf4 Kd6 85.Rh7 Rg8 86.Kf3 Bc5 87.Rh4 ½–½. Mephisto Mondial12 – GrandMasterChess, 1994.

5.d4 e6 6.Nd2 Be7 (6...a4 7.Be2+=) 7.Ngf3 0-0 8.Be2 c5 (8...Nbd7 9.0-0=) 9.0-0 (9.dc5 Bc5 10.0-0 a4=) 9...a4 (9...c4 10.Nh4=) 10.c4 (10.dc5 Bc5 11.Bd4 Nbd7=) 10...dc4 (10...a3 11.Bc3=) 11.Nc4 (11.dc5 Bc5 12.Rc1 c3 13.Rc3 Nbd7=) 11...Nbd7 12.Nce5 (12.Rc1 Be4=) 12...a3+= 13.Bc3 Ne4 14.Bd2 (14.Rc1 Ne5 15.Ne5 Rc8=) 14...Ndf6 (14...Ne5 15.de5 Qd5–/+) 15.Nh4? (15.Rc1 Rc8+=) 15...Bg6?? (15...Nd2 16.Nf5 Nf1 (16...ef5?! 17.Qd2 Ne4 18.Qd3=) 17.Ne7 Qe7 18.Qf1 cd4 19.ed4 Rfd8–+) 16.Nhg6= hg6 17.Bf3 (17.f3!? Nd2 18.Qd2 cd4 19.ed4=) 17...cd4+= 18.Be4 (18.ed4 Qd4 19.Bf4 Rfd8–/+) 18…Ne4–/+ 0–1. gtate (1900) – cmarcolino (2480), net–chess.com, 2004.

5.Be2 e5 (5...e6!?=) 6.Be5+= Be7 (6...Nbd7 7.Bd4+=) 7.d3 (7.Nf3 Nbd7+–) 7...0-0 (7...Nbd7 8.Bc3 0-0 9.Nf3+=) 8.g4 (8.Nf3 Re8+=) 8...Bg6 (8...Be6 9.h3=) 9.h4+= Nfd7 10.Bb2 (better 10.Bg3 f6 11.Nf3+=) 10...h5? (better 10...Bh4 11.Nf3 Bf6=) 11.gh5+– Bh7 (11...Bf5 12.Nc3 Be6 13.Nf3+–) 12.h6! g6 (12...gh6 13.Nh3 Combination) 13.Nf3 Bf6 14.Nc3 (14.Bf6 Nf6 15.d4 Nbd7+–) 14...c6 (14...a4 15.a3+–) 15.Qd2 (15.h5 g5+–) 15...Ne5 (15...Nb6 16.h5+–) 16.0-0-0 (16.Ne5 Be5 17.bc6 Nc6+–) 16...Nbd7 (16...Nf3 17.Bf3 Nd7 18.h5+–) 17.Ng5! a4 (17...Bg5 18.f4 Double attack (18.f4 Decoy)) 18.a3 (better 18.f4 a3 19.Ba1 cb5 20.fe5 Ne5+–) 18...Nc5 (18...Nb6 19.f4 Ned7 20.h5 Bg5 21.fg5 Qg5 22.hg6 fg6 23.Rdg1+–) 19.f4 (better 19.d4 Ned7 20.dc5 Nc5+–) 19...Ned7 20.Rdg1 (20.Rhg1 Qe7+–) 20...Kh8 (20...d4 21.Nce4 (21.Nh7?! Kh7 22.Ne4 Ne4 23.de4 de3 24.Qe3 Bb2 25.Kb2 cb5+–) 21...Ne4 22.de4 de3 23.Qe3 cb5 24.Bb5+–) 21.Nh7 (21.h5!? Qe7+–) 21...Kh7 22.h5 cb5 (22...g5 23.e4 gf4 24.ed5+–) 23.hg6 fg6 24.d4 (24.Nb5?! Qb6 25.Bf6 Nf6+–) 24...Ne4 25.Ne4 de4 26.Bb5 Rc8 (26...Qe8 27.Qg2 Rd8 28.Ba4+–) 27.Qg2 Qe8 (27...Rg8 28.Qe4 Rc7+–) 28.Bd7 Qf7 (28...Qd7 29.Qg6 Kh8 30.d5 Bb2 31.Kb2+–) 29.Ba4 (29.Bc8 Rc8 30.Qe4 Re8+–) 29...Rg8 (29...Rc7 30.Qe4 Re7 31.Qd3+–) 30.Kb1 (30.Qe4 b5 31.Bb5 Rc7+–) 30...Be7 (30...b5 31.Bb3 Qe7 32.Bd5+–) 31.Bb3 (31.Qe4 Bf6+–) 31...Qf6 (31...Qf5 32.Qg4 Qg4 33.Bg8 Rg8 34.Rg4+–) 32.Qe4 Rcf8 33.Qb7 (better 33.Be6 Bd6 34.d5 Qb2 35.Kb2+–) 33...Rg7 34.hg7 Kg7 35.d5 Rf7 36.Bf6 Bf6 37.Qf7! Kf7 38.d6 (38.Rh7 Ke8 39.Rg6 Be7 40.d6 Bd6 41.Rg8 Bf8 42.Ba4 Kd8 43.Rf8) 38...Ke8 39.e4 (39.Rg6 Kd7 40.Rh7 Kc6 41.d7 Kc7 42.d8Q Kc6 43.Qf6 Kc5 44.Qe5) 39...Kd7+– 40.e5 Kc6 41.ef6 Kc5 (41...Kb7 42.f7 Ka7 43.d7 Kb6 44.d8Q Kb7 45.Qd7 Kb6 46.Rg6 Kc5 47.f8Q) 1–0. FeegLood (2745) – rondep (2210), lichess.org, 2015.

5.Ne2 e6 6.Ng3 Bg6 7.Nc3 Bd6 8.Nce2 Nbd7 9.h4 h6 10.Nf4 Bh7 11.Ngh5 Rg8 12.c4 dc4 13.Bc4 Qe7 14.Rc1 Ne5 15.Nf6 gf6 16.Be2 b6 17.d4 0-0-0 18.Kf1 Nd7 19.Bf3 Kb8 20.Qb3+= Bf5 21.Nd5! Qf8 22.Qc4 Nc5? 23.dc5+– Bc5 24.Nf4 e5 25.Nd5 Qd6 26.e4 Bg4 27.Bg4 Rg4 28.Qe2 Rdg8 29.g3 f5 30.Rd1 Re4 31.Qf3 Qe6 32.Kg2 Reg4 33.Ne3 Be3 34.Qe3 e4 35.Rd4 Qa2 36.Qc3 Qe6?? 37.Rc1+– Rc8 38.Rd8!! Qe7 39.Rc8 Kc8 40.Qc6 Rg6 41.Qa8 Kd7 42.Rd1 Rd6 43.Ba3 e3 44.Rd6 cd6 45.Qb7 Ke6 46.Qe7 Ke7 47.fe3 Ke6 48.Kf3 Kd5 49.Kf4 Kc4 50.Bd6 Kb5 51.Kf5 1–0. Skoeld – Joffe, 1959.

5.Nf3 Nbd7 6.Be2 e6 7.0-0 Bd6 8.d4 h6 9.c4 dc4 10.Bc4 0-0 11.Nc3 Nb6 12.Bd3 Bd3 13.Qd3 Nbd5 14.e4 Nc3 15.Bc3 Bb4 16.Bb2 Re8 17.Rac1 Rc8 18.Rfd1 Nh7 19.a3 Be7 20.Ne5 Bf6 21.Nc4 Bg5 22.Rc2 Nf8 (better is 22...c6!? 23.Bc3 b6+=) 23.Na5+– c5? (better is 23...Rb8+–) 24.Nb7 (24.Nb7 Qc7 25.Nc5+–) 1–0. Lannoy,Jean_Claude Albert – Erillinen,Alp, CL5–2009.18.01, 2009.

5.Nf3 Nbd7 6.Be2 e6 7.Nh4 Bg6 8.0-0 Bd6 9.f4 Ne4 10.Qe1 (10.Ng6 hg6 11.Bg7 Rh7=) 10...0-0 (10...Nef6 11.f5 ef5 12.Nf5 Bf5 13.Rf5=) 11.d3+= Nef6 12.g4 (12.Ng6 fg6 13.Qg3 Qe7=) 12...c6 13.g5 Ne8 14.bc6 bc6 15.Ng6 hg6 16.Qh4 Qb8 17.Bc1 f5 (17...Qc7 18.Rf3=) 18.gf6+= gf6 19.Rf3 Ng7 20.Rg3 g5 21.Qh6 Kf7 22.Qh7 Rg8 23.Rg2 gf4 24.ef4 Bf4 25.Bh5 Kf8 26.Qg6 Bh2 27.Kf1 Ke7 28.Qf7 Kd6 29.Rg7 Rg7 30.Qg7 Be5 31.c3 f5 32.Qg5 Qb5 33.Be2 Rh8 34.Qg1 Bh2 35.Qf2 Be5 36.Qf3 Qb8 37.d4+– Bh2 38.Nd2 Qg8 39.Qg2 Bg3 40.Nf3 f4 41.c4 Qh7 42.Ba3 Kc7 43.Rd1 Nf6 44.Bc1 Ne4 45.Bd2 Nd2 46.Rd2 Qb1 47.Bd1 Kd8 48.c5 Kd7 49.Kg1 a4 50.Rd3 Rh2 51.Qf1 Qb2 52.Ba4+/– Rf2 53.Qh3+– Qb1 54.Rd1 Qe4 55.Re1?? Rf3= 56.Bc6! (56…Kc7 57.Re4 Bf2 58.Kg2 Rh3 59.Bd5 (59.Kh3?! de4 60.Be4 Bd4=; < 59.Kf2 de4 60.Be4 Ra3–/+; 59.Rf4?! Rh4 60.Rf2 Kc6+=) 59...ed5 60.Re7 Kc6 61.Re6 (61.Kh3?! Bd4 62.Kg4 Be3+=) 61...Kc7 62.Kh3 (62.Kf2?! Rd3=) 62...Bd4 63.Kg4+–; 56.Re4 Bf2 57.Kg2 Rh3 58.Bc6 Kc6 59.Re6 Kc7 60.Kh3 Bd4+–) 1–0. Taulien,Hans_Juergen – Gross,Karl, remoteschach.de, 2002.

5.Nf3 e6 6.c4 dc4 7.Bc4 Bd6 8.0-0 0-0 9.d4 Nbd7 10.Ne5 Nb6 11.Be2 Rc8 12.Nd2 Ne4 13.Bf3 (better is 13.Ne4 Be4 14.f3=) 13...Nd2–/+ 14.Qd2 Be5 15.Qa5 Bd6 16.Bb7 Rb8 17.Bc6 Nc4 18.Qc3 Nb2 19.Qb2 Bh2! 20.Kh2 Qd6 21.Kg1 Qc6! 22.a4 Qb7 23.Rfc1 Rfd8 24.Qc3 Rbc8 25.f3 Rd6 26.e4 Bg6 27.Qc5 f5 28.a5 fe4 29.a6 Qa8 30.a7 Rdd8 31.b6 ef3 32.bc7 Rf8 33.Ra2? fg2–+ 34.Rg2 Qf3 35.Qc3 Qf4 36.Qc4 Qe3 37.Kh2 Rf3 38.Kh1 Rh3 39.Rh2 Be4 0–1. Jostov,Keylah – Krabbenbos,Jan, SC–2008–0-00024, 2009.

5.Nf3 e6 6.c4 Bd6 7.Nc3 0-0 8.Be2 dc4 9.Bc4 Nbd7 10.a4 Qe7 11.d4 Rfd8 12.0-0 e5 13.Nd5 Nd5 14.Bd5 Rab8 15.de5 Ne5 16.Qb3 Nf3 17.Bf3 Qh4 18.g3 Qb4 19.Qc3 f6 20.Rfd1 b6 21.Bd5 Kf8 22.e4 Bg4 23.Rd2 Re8? (23...Qc3 24.Bc3 Rbc8 25.Rc1+=) 24.Kg2 (24.Qd3 Be5 25.Ba3 Ba1+–) 24...Re7? (24...Be6 25.Bc6 Red8 26.Qc2+=) 25.h3?? (25.Qc1 Be5 26.h3 Be6+–) 25...Bh5? (25...Be6 26.Bc6+=) 26.f4?? (better 26.Qc1 Be5 27.Ba3+–) 26...Bf7+= 27.Bc6 (27.Kf3 Bd5 28.Qb4 ab4 29.Rd5 Rbe8+=) 27...Bg6 The pressure on e4 grows (27...Be8 28.Re2=) 28.Rd4+= Qc3 29.Bc3 Bc5 30.Rc4 Bf7 31.Bd5 (31.Rc5 bc5 32.e5 Rd8+=) 31...Bd5= 32.ed5 Re2 33.Kf3 Rf2 (33...Rbe8!? 34.Kg4 R2e3 35.Ba5 Be7=) 34.Kg4+= Bd6 35.Re4 (35.Re1 Re8+=) 35...Kf7 36.Rae1 h5 37.Kh4 Rf3 38.R1e3 g5 39.fg5?? (better 39.Kh5 gf4 40.Re7 Be7 41.Rf3 fg3 42.Rg3 Rh8 43.Kg4 Rg8 44.Kf3=+) 39...Kg6–+ 40.Rg4 hg4 (40...hg4 41.Bd4 Re3 42.Be3 Re8 43.gf6 Re3–+) 0–1. Mothes,Rainer (1750) – Spitzl,Vinzent (2250), Franken Power Open, 2018.

5.Nf3 e6 6.Be2 a4 7.Nh4 a3 8.Bd4 Bg6 9.Ng6 hg6 10.c4 (10…c5 11.Be5=) =. Behrmann,Klaus – Lockett,Karl, corr compuserve, 1998.

5.Nf3 e6 6.h3 Nbd7 7.c4 (7.Nc3 Bd6=) 7...c6 (7...Nc5 8.cd5 Nd5 9.a3+=) 8.a4 (8.Nd4 Bc5 9.Nf5 ef5=) 8...Bb4 9.Be2 Qe7 (9...cb5 10.cb5 0-0 11.Nc3+=) 10.0-0 e5 (10...0-0 11.Nc3=) 11.Nh4 (11.cd5 cd5 12.Nc3 0-0=) 11...Be6 12.Nf3 Bd6 (12...0-0 13.cd5 cd5 14.Ne5 Bh3 15.Nd7 Bd7 16.Bf3+=) 13.Qc2 (13.d4 ed4 14.Nd4 Rc8+= (14...dc4? 15.bc6 Ne5 16.Nb5+–)) 13...h6 (13...cb5!? 14.ab5 e4=) 14.d4+/– ed4 15.Nd4 c5 16.Nf5 (16.cd5!? Bd5 17.Nf5+/–) 16...Bf5+= 17.Qf5 Qe6 18.Qc2 Bc7 (better is 18...0-0!?+=) 19.Rd1+/– 0-0-0 20.cd5 Qd6? (20...Nd5!? 21.Qc4 N5f6+/–) 21.g3+– Rhe8 (21...Nd5 22.Bg4 (22.Bg7 Ne3 23.Rd6 Nc2 24.Rd7 Kd7 25.Bh8 Rh8=) 22...Kb8 23.Na3 Ne3 24.fe3 (24.Rd6?! Nc2 25.Rd7 Na1 26.Rf7 Rhe8+=) 24...Qg3 25.Kh1+=) 22.Qf5 (better is 22.Bf3!? Qe7+–) 22...Kb8 23.Bf3 Ne5 24.Bg2 Nc4 25.Bf6 gf6 (25...Qf6 26.Qf6 gf6 27.Rc1+–) 26.Nd2 Nd2 27.Rd2 Qe5 28.Qb1 Rg8 (better is 28...h5+–) 29.Qb2?? (better is 29.b6 Bd6 30.Qd1+–) 29...Qb2+= 30.Rb2 Be5 31.Rab1 Bb2 32.Rb2 b6 33.e4 (33.Kf1 Kc7+=) 33...Kc7+= 34.g4 Kd6 35.f4 h5 (35...c4 36.Kf2–/+) 36.Bf3 (36.gh5!? Rg3 37.Re2–/+) 36...hg4–/+ 37.hg4 Rh8 38.Kg2 Rh7 39.Kf2 Rh2 40.Bg2 Rdh8 41.Re2 R8h3 (41...c4!?–/+) 42.Kg1 Rg2 43.Kg2 (43.Rg2 Re3 Combination; 43.Kg2 Ra3 Combination) 43...Ra3 44.g5 fg5 (44...Ra4 45.gf6 Rd4 46.Kf3+–) 45.fg5 Ra4 46.e5 (46.Kg3 Rd4=) 46...Kd5 47.Kg3 (47.e6!? fe6 48.Kg3 Ra3 49.Kg2–/+) 47...Ke6 48.Re3?? (better is 48.Rf2 Ra3 49.Kg4–/+) 48...Rb4–+ 49.Rf3 Rb5 50.Rf6 Ke7 51.e6 (51.Kf4 a4 52.Ke4 a3–+) 51...fe6 52.Rf3 (52.Rf4 c4! 53.Rc4 Rg5 54.Kf4 Rc5–+) 52...c4 53.Kg4 (53.Kh4 Rf5 54.Rc3 Rc5–+) 53...Rf5! (53...Rf5 54.Rg3 a4–+) 0–1. birola (1660) – heaterhog (1890), gameknot.com, 2011.

5.Bf6 ef6 6.Nf3 Be7 7.Be2 0-0 8.0-0 Nd7 9.d4 Bd6 10.a4 (10.c4 dc4 11.Bc4 c5=) 10...Re8 11.c4 dc4 12.Bc4 Nb6 13.Nbd2 (13.Bd3 Qd7=) 13...Nc4 14.Nc4 Bb4 15.Qb3 Be4 16.Ne1 Qd5 (16...f5 17.Ne5 Bd5 18.Qc2=) 17.f3 Bf5 18.Nc2 Be6 19.Nb4 Qc4 20.Qc4 Bc4 21.Rfc1 Bb3 (21...Be6 22.Nd3 (< 22.Rc7 ab4 23.Rb7 Bd5–/+) 22...Re7 23.Rc3+/–) 22.Rc3+/– Be6 23.Nd3 (< 23.Rc7 ab4 24.Rb7 Reb8 25.Rb8 Rb8=+) 23...c6 24.bc6 bc6 25.Rc6 (25.Kf2 Ra6+/–) 25...Bd5 26.Rc5 Re3 27.Rd5 Rd3 28.Rb1 h6 29.Rbb5 Kh7 30.Kf2 Rd2 ½–½. Zimmer,Georg – Rosner,Dirk, corr, 1994.

5.c4 e6

6.a4 Bd6 7.Nf3 0-0 8.Be2 Nbd7 9.0-0 h6 10.d4 Re8 (10...dc4 11.Nbd2=) 11.Nc3 dc4 12.Bc4 Nb6 13.Bd3 Bb4 14.Bf5 ef5 15.Rc1 Ne4 16.Ne4 fe4 17.Ne5 Nd5 18.Qb3 f6 19.Ng6 (19.Rfd1!?=) 19...Kh7=+ 20.Nh4 g5 (better 20...Qd7!? 21.Qc2 f5=+) 21.Nf5+= Kg6 (21...Qd7 22.g4+=) 22.Ng3 (22.f3 Bd6+–) 22...h5 (22...f5 23.f3 Bd2 24.Rc5 Ne3 25.fe4 Nf1 26.Rf5+=) 23.Qd1 h4?? (better 23...g4+–) 24.Qh5+– Kg7 25.Nf5 (25.Nf5 Kf8 26.Qh8 Kf7 27.Qh7 Ke6 28.Nh6+–) 1–0. BeepBeepImAJeep (2595) – kicmak (2315), lichess.org, 2017.

6.a4 Nbd7 7.Nf3 Bb4 (7...Nc5 8.Ne5+=) 8.Be2 (8.cd5 ed5 9.Be2 0-0=) 8...Nc5+= 9.0-0 (9.cd5!? Qd5 10.0-0+=) 9...Nd3–/+ 10.Bd3 (10.Bd4 dc4 11.Ne5 Bc5 12.Bc5 Ne5=) 10...Bd3 11.Re1 dc4 12.Ne5 Qd5 13.Nd3 (13.Bd4 Nd7 14.Nd3 cd3–/+) 13...Qd3 (13...cd3!? 14.Nc3 Qg5–/+) 14.Qf3+= Ne4 The pressure on the backward pawn d2 grows 15.Bg7 Rg8 16.Be5 Rc8 (16...Qd5 17.Bc7 Rc8 18.Bf4+=) 17.Nc3= Nc5 (worse is 17...Nc3 18.dc3 (18.Bc3?! Rb8=) 18...Bc3 19.Qb7+/–; 17...Bc3?! 18.dc3 Qd5 19.Bg3 Nc3 20.e4=) 18.Qf4 (18.Bd4!? c6 19.Bc5 Bc5 20.Ne4=) 18...Qg6–/+ 19.Qf3 Nd3 (19...Qg4!? 20.Qg4 Rg4+=) 20.Qb7= Kd8 21.Bg3 Ne1 22.Re1 Qd3 23.Bh4 Be7 24.Bg3 Qd7 25.Qe4 .Qd3= 26.Qb7 Qd7 27.Qa6+= Bb4 28.Bh4 Ke8 29.Ne4+/– Rg6 30.Nf6 Rf6 31.Bf6 Rb8 32.Qa7 Rc8+/– 33.Qb7 c6+= 34.Qa6 cb5+= 35.ab5 Rb8 36.b6 Qd2 37.Ra1 Attacking the isolated pawn on a5 37...c3 38.Qb5 Kf8 39.Qg5?? Rb6?? 40.Qg7+/– Ke8 41.Qg8?? Kd7?? 42.Qf7+– Kc6 43.Qe6 Kb7 44.Qf7 Ka6 45.Qc4 Kb7 46.Qf7 Ka6 47.Qc4 ½–½. Vera,Gajardo Jorge L (2020) – Da Silva,Saulo de Tarso (2030), Sao Paulo Communic 1st, 2004.

6.cd5 Nd5 7.Nc3 Nc3 8.Bc3 Nd7 =.

6.Nf3 Bd6 7.d4 =+.

6.Nf3 Nbd7 7.Nc3 Nc5 8.d4 Nce4 9.c5 b6 10.Qa4 Nd7 11.Ne4 Be4 12.c6 Bb4 13.Kd1 Nf6 14.Ne5 Bd6 15.f3+= Bf5 16.g4+/– Bg6 17.h4 h5 18.Ng6 fg6 19.g5 Ng8 20.Bh3 Kf7 21.Rf1 Bg3+= 22.e4 Ne7 23.Qb3 Bh4 24.f4 a4=+ 25.Be6 Ke6 26.Qh3 Kf7 27.Qh4 de4 28.f5 gf5 29.Qe4=+ g6 30.Ba3 Nd5 31.Rf5?? gf5–/+ 32.Qf5 Nf6 33.Bb2 Rg8 34.d5?? Qd5–+ (35.Qd5 Nd5–+) 0–1. Johnston,R – Saulmon,Scott, Flint ch–MI class–B, 1992.

6.Nf3 Nbd7 7.Be2 Bd6 8.Nh4 Bg6 9.Ng6 hg6 10.Nc3 (10.cd5 ed5 11.h3 c5=) 10...Nc5 (10...dc4 11.Bc4 Rh2 12.Rh2 Bh2 13.g3=) 11.d4 Nce4 12.h3 Nc3 13.Bc3 Ne4 14.Qc2? (better is 14.Bd2=) 14...Nc3–+ 15.0-0? (better is 15.c5 Ne2 16.cd6 Nd4 17.ed4 cd6 18.Rc1–+) 15...Ne2 16.Qe2 Qg5 17.c5 Be7 18.f4 Qh4 19.a4 g5 20.f5 Qe4 21.fe6 Qe6 22.Rf2 g4! 23.Raf1 gh3 24.Rf7 h2 25.Kh1 Qf7 26.Rf7–/+ Kf7 27.Qf3 Ke6 28.Qg4 Kf6 29.Qf4 Kg6 30.Qg4 Bg5 31.Qe6 Bf6 32.Qd5? Rae8–+ 33.e4 Rh5?? 34.e5–/+ Rh4 35.g3 Rh5 36.Qd7?? Be5?? 37.Qe8+– (37.Qe8 Kf6 38.Qh5 Bd4 39.Qf3 Ke6 40.Qb7+–) 1–0. orangutanb4 (1960) – elartur (1780), kurnik, 2011.

4.e3 Bg4

5.Be2 Be2 6.Qe2 e6 7.Nf3 Bd6 8.c4 0-0 9.0-0 Nbd7 10.d4 Ne4 11.c5 Be7 12.Nc3 Ndf6 13.Ne5 Nc3 14.Bc3 Ne4 15.Be1 f6 16.Nd3 Qe8 17.a4 e5 18.f3 Ng5 19.Bg3 ed4 20.Rfe1 Qd7 21.h4 Nf7 22.ed4 Rae8 23.Qd2 b6 24.Nf4 Bd8 (24...bc5!? 25.Ne6 cd4 26.Nf8 Rf8 27.Qd4 Rc8+–) 25.c6+– Qf5 26.Qa2 g5 27.Qd5 Re1 28.Re1 Qd5 (28...Qc2 29.hg5 fg5 30.Ne6+–) 29.Nd5 Nd6 (29...gh4 30.Bc7 Bc7 31.Nc7+–) 30.Bd6 cd6 31.c7 (31.c7 Bc7 32.Nc7 gh4 33.Nd5+–) 1–0. Nemec,Zdenek (2250) – Couspeyre,Thierry, OP–2012–0-02037, 2012.

5.Be2 Be2 6.Qe2 e6 7.Nf3 Bd6 8.d3 c6 9.e4 Bb4 (9...cb5? 10.e5+–) 10.c3 Be7 11.e5 Nfd7 12.c4 0-0 13.0-0 a4 14.Nc3 a3 15.Bc1 Qa5 16.Bd2 Bb4 17.Rfc1 dc4 18.dc4 Bc5 19.Ne4 Qb6 20.Rab1 Rc8 21.Nfg5 h6 22.Qh5 Ne5? (better is 22...Bf2 23.Nf2 hg5 24.Qg5 Qd4=) 23.Ne6!+– fe6 24.Qe5 cb5 25.Rb5 (25.cb5?! Nd7 26.Qg3 Kh8+/–; 25.Nc5 Rc5 26.Qg3 Qc7 27.Qc7 Rc7 28.cb5 Rc1 29.Rc1 Nd7+/–) 25...Nd7 (25...Bd4 26.Nf6 (26.Rb6?! Be5 27.Rb7 Nc6+/–) 26...Kf8 27.Qh5 (27.Rb6?! Be5 28.Bb4 Kf7+/–) 27...Qb5 28.Qb5 (28.cb5 Rc1 29.Bc1 gf6+–) 28...Bf6 29.Bb4 Kg8 30.Qb7+–) 26.Nf6!! (26...gf6 27.Qg3 Kf7 28.Rb6 Nb6 29.Bh6+–; 26.Rb6?! Ne5 27.Re6 Nd3+/–) 1–0. Sveinsson,Jon – Miguel,Juan, CO1–02 www.b2–b4.com, 2003.

5.Be2 Be2 6.Ne2 e6 7.0-0 Bc5 8.Bf6 Qf6 9.d4 Bd6 10.Nd2 0-0 11.c4 dc4 12.Nc4 Nd7 13.a4 Rfd8 14.Rc1 h6 15.Nc3 Qf5 16.e4 Qf4 17.g3 Qf6 18.e5 Ne5 19.de5 Be5 20.Ne4 Qf5 21.Qe2 Bd4 22.Rfd1 Rd5 23.Ncd2 c5 24.bc6 bc6 25.Rc6 Rad8 26.Nf3 e5 27.Rcc1 R8d7 28.Rb1 Rd8 29.Rb5 Rb5 30.ab5 a4 31.Rd3 Bb6 32.Ra3 Ra8 33.Nc3 Re8 34.Ra4 Re6 35.g4 Qf6 36.Nd5 Qg6 37.Ne5 Qg5 38.Ra8 Kh7 39.Rh8 Kh8 40.Nf7 Kg8 41.Qe6 Qh4 42.Ng5 Kf8 43.Qf7 1–0. Bonetti,Shane – LendaFan, ICC, 2002.

5.Nf3 Nbd7 6.c4 e6 7.a4 Bb4 8.Be2 dc4 9.Bc4 Nb6 (9...0-0 10.0-0=+) 10.Be2= 0-0 11.0-0 Qe7 12.d4 Nbd5 13.Ne5 Bf5 14.Nd2 Nh5?? (better 14...Rad8=) 15.Bh5+– f6 (15...Rad8 16.e4 Bd2 17.ef5+–) 16.Nec4 Bd3 17.Be2 Bg6 18.Rc1 Rfd8 19.Qb3 Qf7 (19...c6 20.bc6 bc6 21.e4+–) 20.Bd3 (20.e4 Nf4 21.Bd1 c5+–) 20...Rd7 21.Bg6 Qg6 22.Nf3 Rad8 23.Nce5 (better 23.Ba3!? Ra8+–) 23...fe5 24.Ne5 Qf6 25.Nd7 Rd7 26.e4 Nf4 27.Rc2 Qg6 Threatening mate: Qxg2 28.Qg3?? (better 28.f3+–) 28...Qe4= 29.d5? (better 29.Rfc1=) 29...Qc2–+ 30.Qf4 Qb2 31.de6 (31.de6 Re7 32.Qe4–+). BeepBeepImAJeep (2590) – Just_Passing_by, lichess.org, 2017.

5.Nf3 e6 6.Be2 Bd6 7.0-0 c6 8.Nc3 0-0 9.h3 Bh5 10.Re1 (10.Rb1 Nbd7=) 10...Nbd7 11.d4 (11.Rb1 e5=) 11...Qc7=+ 12.bc6 bc6 13.Bd3 Rfb8 14.Rb1 Rb4 15.Qe2 (15.a3 Rb7=+) 15...Rab8–/+ 16.Nd1 Ne4 17.c3 R4b6 18.Qc2 Bf3 19.gf3 Ng5 20.Kg2 f5 21.c4 R6b7 22.Rc1 (22.c5 Be7=) 22...Nf6 23.f4 Nf7 24.cd5 cd5 25.Qa4 Qd7 26.Qd7 Rd7 (26...Nd7 27.Bc3=+) 27.a4 (27.Re2 Rdb7=) 27...Rc7 28.Rc7 Bc7 29.Bc3 (29.Re2 Rb3 30.Ba6 Kf8=) 29...Nd6=+ 30.f3 Nc4 31.Kf2 Rb3 32.Re2 Ra3 33.Bc2 Bd6 34.Bb2 Nb2 35.Nb2 Rc3 36.Bd3 Ba3 37.Bb5 =. Psion – Psion, 4 Min/Zug, 1990.

4.e3 g6

5.c4 dc4 6.Bc4 Bg7 7.d4 0-0 8.Ne2 c6 9.Nbc3 cb5 10.Nb5 Bd7 11.0-0 Bb5 12.Bb5 Nc6 13.Bc6 bc6 14.Qc2 Rb8 15.e4 (Better is 15.Ba3+=) 15...Ne4=+ 16.Ba3 (16.Qe4 Rb2) 16...Qd5 17.Be7 Rfe8 18.Ba3 c5! 19.Rad1 (19.Qc5 Nc5) 19...cd4 20.Rd3 Rec8–+ 21.Qd1 Rd8 22.Re1 Qa2 23.f3 Nd6 24.Bd6 Rd6 25.Qa1 Qc2 26.Qd1 Qb2 27.Nc3 Rc6 28.Na4 Qb4 29.Re2 Qc4 30.Nb2 Qb4?? 31.Kf2?? Rcb6 32.Qc2?? Qb2 33.Qa4 Qb5 34.Qd1 a4 35.Ra3 Ra8 36.Qe1 Rb7 37.g3 Rbb8 38.Qa1 d3 (39.Qe1 Qc5 40.Kg2 Qa3–+) 0–1. Adams,Jonathan (1625) – Gloistein,Bruce, NZL–ch Major op, 1999.

5.c4 c6 6.cd5 cd5 7.Nf3 Bg7= 8.Be2 0-0 9.0-0 Bg4 10.d3 Nbd7 11.Nbd2 a4 12.Rc1 Qb6 13.Ba3 Rfe8 14.d4 h6 15.Qc2 e5 16.de5 Ne4 17.Ne4+/– de4 18.Nd4 Be2= 19.Ne2 Qb5 20.Rfd1 Ne5 21.Nc3 Qa6 22.Ne4+= Rac8 23.Qc8 Rc8 24.Rc8 Kh7 25.h3 Qe2 26.Rcd8?? Qa2–+ 27.Bf8 Qc2 28.Bg7 Kg7 29.R8d4 a3 30.Nd6 a2 31.Ne8?! Kf8 32.Nf6 Qb1 33.Rd8 Ke7 34.Ng8 Ke6 35.R8d6 Kf5 36.Kh2 a1Q–+ 37.Rf6 Kg5 38.f4 Kh5 39.Rb1 Nf3 40.Kg3=+ Qb1 41.Kf3? Kh4 42.Nh6 Qf1 43.Ke4 Qg2 44.Kd3 Qd5 45.Kc2 Qa2 46.Kd3 Qb1 47.Kc4 Qc2 48.Kd5 Qd3 49.Ke5 Qc3 (50.Kd5 Qf6–+) 0–1. Skulsky,Ian – Fullbrook,Nigel (2285), Vancouver British Columbia–ch, 1987.

5.Bf6 ef6 6.d4 (6.Nf3 Be6=) 6...Bd6 (6...Be6 7.Nf3+=) 7.c4 (7.Bd3 0-0=) 7...0-0 (7...Bb4 8.Nd2=) 8.cd5 (8.c5 Be7+=) 8...c6 (8...Bb4 9.Nd2+=) 9.bc6 (9.dc6 bc6 10.Qf3 Qb6+–) 9...bc6+= 10.dc6 Nc6 11.Nf3 Bb4 (11...Be6 12.Nc3+=) 12.Nbd2+– Re8 (12...Bg4 13.a3 Bd2 14.Qd2 Bf3 15.gf3+–) 13.Be2 (13.a3 Bd2 14.Qd2 Bg4+–) 13...Ba6 (13...Be6+–) 14.0-0 (better 14.Ba6!? Ra6 15.0-0+–) 14...Be2+= 15.Qe2 Nd4 16.Nd4 Qd4 17.Nf3 Qe4 18.a3 (18.Rac1 Rad8+=) 18...Bc3 19.Rfd1?? (better 19.Rac1 Rec8 20.Rc2=) 19...Ba1–+ 20.Ra1 Rac8 (20...Rab8 21.Qf1–+) 21.Rd1 (21.Qa6 Qa4–+) 21...Qc2 (21...Qa4 22.Ra1–+) 22.Qf1 Qb3 23.Nd4 (23.Ra1 Qa4–+) 23...Qa3 24.Ra1 Qc5 25.h4 (25.h3 Red8–+) 25...Qd5 26.Qa6 Rc4 (26...Qe5!? 27.Qf1–+) 27.Qf6 (27.Ra5 Rc1 28.Kh2 Qd7–+) 27...Qe5 28.Qa6 (28.Qe5 Re5 29.Kf1 a4–+) 28...Rc5 (28...Rec8 29.Rd1–+) 29.Qb6 (29.Rd1 Rd8–+) 29...h5 (29...Rec8 30.Qb1–+) 30.Rd1 Rec8 31.Nf3 Qc7 (31...Qe7 32.Qb2–+) 32.Qb2 (better 32.Qf6–+) 32...Rc1 33.Re1 Re1 (33...a4 34.Qe2 Qa5–+) 34.Ne1 Qc1 35.Qe2 Rd8 36.Kh2 Rd2 (36...Rd2 37.Qa6 Qe1 38.Qa8 Kh7 39.Qa5 Qf2–+) 0–1. FeegLood (2375) – penguingim1 (2560), lichess.org, 2017.

4.Nf3 c5

5.bc6 Nc6 6.e3 Qb6 (6...e6 7.Na3=) 7.Bf6 gf6 (7...ef6 8.Nc3=) 8.h3 (8.Nc3 Qd8+=) 8...e5= 9.Nc3 Be6 10.Rb1 Qc7 11.Nb5 Qd7 12.a4 Rg8 13.Nh4 e4 (13...Rc8 14.Nf3=) 14.c3 Ne5 (14...Rc8!?=) 15.Nd4 Nd3 (better 15...0-0-0!?+=) 16.Bd3+– ed3 17.Rb5 (17.Qh5 h6 18.f4 Qc8+–) 17...Bd6 (17...f5 18.Qh5+–) 18.Qb1 (18.Qh5 Rg7+–) 18...Be5 (18...Rg5 19.Qd3 Rh5 20.Nhf3+–) 19.Qd3 Bc7? (19...Rg7+–) 20.Qh7 0-0-0 21.Qb1 b6 22.Qd3 (22.Rb6?! Bb6 23.Qb6 Qa4+–) 22...Rh8 Black terminates the opponent with strong threats 23.Nhf5 Rdg8 24.Kf1 (24.Nc6 Bf5 25.Qf5 Qf5 26.Ne7 Kd7 27.Nf5 Ke6 28.Nd4 Kd6+–) 24...Rh5 25.e4 (better 25.f4!? Kd8+–) 25...de4 26.Ne7?? (better 26.Qe4 Bc4 27.d3 Bb5 28.ab5+–) 26...Qe7–+ 27.Nc6 Qa3 (27...ed3 28.Ne7 Kd8 29.Ng8 Rb5 30.ab5+–) 28.Qe4 f5 29.Na7 Kb8 30.Nc6 Ka8 31.Qf3 (31.Qd3 Qc1 32.Ke2 Qh1 33.Ra5 Kb7–+) 31...Bc4 32.Kg1 (32.d3 Qc1 33.Ke2 Qc2 34.Ke1 Qc3 35.Kd1 Qd3 36.Qd3 Bd3 37.Rd5–+) 32…Qc1 (32...Qc1 33.Qd1 Qd1) 0–1. petrobbo (1975) – OldButGood (2305), ChessWorld.net, 2010.

5.e3 h6 (5...e6 6.Be2=) 6.c4 (6.Be2 e6+=) 6...Bf5 7.d4 e6 8.Bd3 (8.Nc3 Bg4+=) 8...Bd3 (8...cd4 9.Bf5 (< 9.ed4 Bd3 10.Qd3 dc4 11.Qc4 Bb4 12.Nbd2 Ne4=+) 9...Bb4 10.Ke2 ef5 11.Qd4+=) 9.Qd3 Nbd7 10.Nbd2 Be7 (10...dc4 11.Nc4 cd4 12.Bd4 Bb4 13.Ke2+=) 11.0-0 0-0 12.Rfc1 (12.Rfd1 Rc8=) 12...b6 (12...Rc8 13.cd5 Nd5 14.Nc4=) 13.a4 (13.cd5 ed5 14.dc5 Nc5+=) 13...Rc8= 14.Rc2 Rc7 (14...Qc7 15.cd5 Nd5 16.Rc4=) 15.Rac1 Qa8 16.Ba3 (16.cd5 Nd5 17.Rc4 Nb4+=) 16...Rfc8 17.Nb3 (17.dc5 Bc5 18.Bb2 dc4 19.Nc4 Qe4 20.Qe4 Ne4=) 17...dc4 18.Rc4 Qe4 (18...Qd5 19.Qc2=) 19.Qe4 (19.Qe2 Qd5+=) 19...Ne4 20.dc5 Nec5 (20...Ndc5 21.Bc5 Nc5 22.Nc5 Rc5 23.Rc5 Bc5 24.Kf1=) 21.Nc5 Bc5 22.Bc5 Rc5 23.Nd2 Kf8 24.Kf1 Ke7 25.Ke2 f5 26.f3 Kd6 27.Rd4 Ke7 28.Rdc4 g5 29.g3 e5 30.e4 fe4 31.fe4 Kd6 32.Kd3 Ke6 33.Nb3 Rc4 34.Rc4 Rc4 35.Kc4 Kd6 36.g4 Nf6–/+ 37.Nd2 Ng4 38.Kd3 Nh2 39.Nc4–/+ Kc5 40.Ne5=+ Kb4 41.Nf7? Ka4–+ 42.Kc4? g4 43.e5 g3 44.e6 g2 45.e7 g1Q 46.e8Q h5 47.Qe2 Qc5 48.Kd3 Qb5 49.Kd2 Qe2 50.Ke2 Kb3 51.Nd6 a4 52.Nb5 a3 53.Na3 Ka3 54.Kf2 b5 55.Kg2 Ng4 56.Kg3 b4 57.Kh4 b3 58.Kh5 Ne3 59.Kg5 b2 60.Kf4 Nc4 (61.Kg4 b1Q 62.Kf4 Qd3 63.Kg5 Kb4 64.Kf4 Ne3 65.Kf3 Qd4 66.Ke2 Kc4 67.Kf3 Kd3 68.Kg3 Qg4 69.Kf2 Qg2 70.Ke1 Qe2) 0–1. Jeschke,Holger – Zielke,Bernd, Schleswig Holstein–ch, 1993.

4.Nf3 Bf5

5.e3 e6 6.c4 Bb1 7.Rb1 Bb4 8.a3 Bc5 9.d4 Bd6 10.c5 Be7 11.Bd3 0-0 12.0-0 Nbd7 13.Qc2 h6 14.c6 bc6 15.Qc6 Ng4 16.Rbc1 Bd6 17.Bc2 Qe7 18.a4 Rab8 19.h3 Ngf6 20.Qc3 Ra8 21.Ba1 Ne4 22.Be4 de4 23.Nd2 Qh4 24.Nc4 Bb4 25.Qb2 Rad8 26.d5 ed5 27.Qg7 1–0. Bonetti,Shane – LendaFan, ICC, 2002.

5.e3 e6 6.c4 Bb1 7.Rb1 Bb4 8.a3 Bc5 9.d4 Bd6 10.c5 Be7 11.Bd3 0-0 12.0-0 Nbd7 13.Qc2 h6 14.c6 bc6 15.Qc6 Ng4 16.Rbc1 Bd6 17.Bc2 Qe7 18.a4 Rab8 19.h3 Ngf6 20.Qc3 Ra8 21.Qd3 Ne4 22.Nd2 Nd2?? 23.Qh7 1–0. Bonetti,Shane – LendaFan, ICC, 2002.

5.e3 e6 6.Be2 Bb4 7.Nh4 0-0 8.0-0 Nbd7 9.a3 Bc5 10.Nf5 ef5 11.d4 Bd6 12.c4 Qe7 13.c5 Nc5 14.dc5 Bc5 15.Nc3 c6 16.Qd3 Ne4 17.Ne4 Qe4 18.Qc3 Qe7 19.Qg7# 1–0. Machete99 – LendaFan, ICC, 2002.

4.Nf3 Bg4

5.e3 Nbd7 6.c4 (6.h3 Bf3 7.Qf3 e5=) 6...e6 7.cd5 (7.h3 Bf5=) 7...Nd5 (7...ed5 8.Be2=) 8.e4 (8.Be2 N7f6=) 8...N5f6 (8...Nf4 9.h3 Bh5 10.g3–/+) 9.h3 Bh5 10.Nc3 Ne5 (10...Nc5 11.Qc2=) 11.g4 Nf3 12.Qf3 Bg6 13.e5 (13.a3 Qd4 14.d3 Nd7=) 13...Nd5 14.Ba3?? (better is 14.Rc1=) 14...Ba3–+ 15.Nd5 (15.Bg2 Bb2 16.Rd1 c6 17.bc6 bc6–+) 15...Qd5 (15...Bb2 16.Nc3 Ba1 17.Qb7–+) 16.Qd5 ed5 17.Ke2 0-0 (17...Bb2!? 18.Re1 Be5 19.Kd1–+) 18.d4 (18.Bg2 Bb2 19.Raf1 Be4–+ (19...Be5?! 20.f4–+)) 18...Rfe8 (18...c5 19.bc6 bc6 20.Bg2–+) 19.Bg2 Be4 20.Be4 de4 21.Rab1 Rad8 22.Ke3 b6?? 23.Rb3–/+ Bb4 24.a3 Bf8 25.Ke4 f6 26.f4 fe5 27.fe5–/+ g6 28.Rc1 Rd7 29.h4 Bh6 30.Rc6 Bg7 31.Rbc3 Red8 32.R3c4 Bf8 33.Rc7= Rc7 34.Rc7 Ba3 35.Rb7 Bb2 36.d5 Ra8 37.Rb6+/– a4 38.Ra6 Re8 39.e6+– a3 40.b6 Rb8 41.d6 Kf8 42.b7! Rb7 43.Ra8 Kg7 44.e7 Rb4 45.Kd5 Rd4 46.Kc5 a2 47.e8Q a1Q 48.Qf8 1–0. aspasio – WILDKNIGHTS, ICC, 1999.

5.Ne5 Bf5 6.c4 (6.e3 Nbd7=) 6...d4 (6...e6 7.e3+=) 7.Nf3 c5 8.e3 d3 (8...de3 9.fe3 Nbd7 10.Be2=) 9.Nh4+= Bg6 (9...Bg4 10.Qb3+=) 10.Ng6+/– hg6 11.Qf3 Qd7 (11...Qc7 12.Be5! Qb6 13.Bd3+/–) 12.Bd3!+– Qd3? (better is 12...a4+–) 13.Qb7 Qc2 (13...e6 14.Qa8 Bd6+–) 14.Qc8# 1–0. aspasio – WILDKNIGHTS, ICC, 1999.

5.Ne5 Bh5 6.c4 (6.g3 c6=) 6...e6 (6...Nbd7 7.cd5 Nd5 8.Nc4=) 7.g3 (7.cd5 ed5 8.Bd4 Bd6+=) 7...Bd6 (7...c6 8.Bg2=) 8.Bg2 0-0 9.d4 Nbd7 (9...c6 10.Nc3=) 10.Nd2 (10.0-0 a4=) 10...a4 (10...c6 11.bc6 bc6 12.Qa4 Be5 13.de5=) 11.Rc1 a3 (11...Qe7 12.f4=) 12.Ba1 (12.Bc3 Qe8=) 12...Re8 (12...Qe7 13.0-0=) 13.h3 (13.c5 Bf8=) 13...Bb4 14.Nd3 (14.g4 Bg6 15.Ng6 fg6+=) 14...Be7 (14...Ba5 15.0-0=) 15.Nf4+= Nb6 16.Nh5 (16.c5 Nc8+=) 16...Nh5 17.e4 g6 (17...Nf6 18.e5 Nfd7 19.0-0+=) 18.c5 Nc8 (18...Na4 19.Qb3+=) 19.e5 (19.0-0 Bg5+=) 19...c6 (19...f6 20.0-0+=) 20.b6 f6 21.ef6 (21.0-0 Ng7+=) 21...Bf6 22.Qe2 (22.0-0 e5+=) 22...Ng7 (22...Bg7 23.0-0+=) 23.Nf3+/– Nf5 (23...Rf8 24.0-0+/–) 24.0-0 Bg7 25.Ne5 Nce7 (25...Ra4 26.Rfe1+/–) 26.Rce1 Ra4 27.g4 Nh4+= 28.Bh1 Nc8 29.f4 Rf8 30.Rb1 Qe8 31.Qe1 Bf6 32.Qg3 Ne7 33.Rbd1 Kh8 34.Rd3 Qc8 35.Ra3+– Ra3 36.Qa3 Be5 37.de5 Qa8 38.Qc3 Qa2 39.Qe1 g5 40.fg5 Rf1 41.Qf1 Kg8 42.Bd4 Qd2 43.Qf2 Qg5 44.Qf6 Qf6 45.ef6 ½–½. aspasio – Saltis, ICC, 1999.

4.Bf6 ef6

5.d4 Bd6 6.a3 (6.Nf3 0-0–/+) 6...Nd7 (6...0-0 7.Nf3–/+) 7.Nf3 f5 (7...0-0 8.e3–/+) 8.e3 f4 (8...Nb6 9.Nbd2–/+) 9.c4 (9.Nc3 Nb6 10.ef4 0-0–/+) 9...fe3–/+ 10.fe3 Qe7 11.Qd2 (better 11.Qe2!? dc4 12.e4–/+) 11...Bf4–+ 12.Ke2 (12.Qe2 Be3 13.Nc3 Nf6–+) 12...dc4 13.Kd1? (better 13.Nc3 Nb6 14.Kf2–+) 13...Be3 14.Qc3 Nb6 15.Bc4 0-0 16.Re1 Re8 17.Ne5 (17.Bf7 Qf7 18.Re3–+) 17...Nc4 18.Nc4 Bg4 19.Kc2 Qe4 20.Kb2 (20.Kb3 a4 21.Kb2 Bd4 22.Re4 Re4–+) 20...Bd4 21.Re4 Re4 22.Nbd2 Bc3 23.Kc3 Re2 24.h3 (24.Nb3 Be6 25.Nca5 Rd8–+) 24...Bd7 25.a4 Rg2 26.Ne5 (26.Ne4 Bh3 27.Rh1 Bf5–+) 26...Bh3 27.Re1 (27.Nec4 Rd8 28.Re1 Bf5–+) 27...Rg3 28.Kb2 Re8 29.Ndc4 (29.Re4 h5 30.Nec4 Re4 31.Ne4 Rg4–+) 29...f6 30.Nf3 (30.b6 cb6 31.Nf3 Re1 32.Ne1 h5–+) 30...Re1 31.Ne1 b6 32.Nc2 (32.Kc2 Be6 33.Nd2 h5–+) 32...Be6 33.N4e3 (33.Nd2 h5 34.Nd4 Kf7–+) 33...h5 34.Kc3 Bf5 35.Kd2 Bc2 36.Nc4 Ba4 37.Ne3 (37.Nb2 Rg2 38.Kd3 Rb2 39.Ke4 Rb3 40.Kd4 Bb5 41.Kd5 Kf7 42.Kd4 Rd3 43.Ke4 Ke6 44.Kf4 g5 45.Ke4 f5) 37...Re3! 38.Ke3 Bb5 (38...Bb5 39.Ke4 a4 40.Kd4 h4 41.Ke3 a3 42.Kf2 a2 43.Ke3 a1Q 44.Kf4 Qd4 45.Kf3 Qd3 46.Kf4 g6 47.Kg4 Qg3) 0–1. workchess – pcmvr, net–chess.com, 2019.

5.e3 Be6 6.a4 (6.Nc3 Nd7+=) 6...c5 (6...Nd7 7.Nc3–/+) 7.Nf3 Nd7 8.Be2 Bd6 9.0-0 0-0 10.Nc3 Nb6 11.d4 (11.g3!?+=) 11...Qc7–/+ 12.Qd2 (12.h3 cd4 13.Qd4 Rfc8–+) 12...cd4–+ 13.ed4?? (better is 13.Nd1–+) 13…Bb4 0–1. mic (2195) – ruter (2475), net–chess.com, 2009.

3.Nc3 d5

4.d4 Ne4 5.Qd3 (5.Ne4!? de4 6.e3=) 5...Bf5+= 6.Qf3 (6.Ne4 Be4 7.Qb3 e6+=) 6...Bg6 (better is 6...e6 7.Ne4 Be4–/+) 7.e3?? (better is 7.Ba3+=) 7...Nc3–+ 8.Nh3 (8.Bb2 Na4 9.Ba3 Bc2–+) 8...e6 (8...Qd7 9.Bb2 Nb5 10.c4–+) 9.Ng5 (9.Bd2 Ne4 10.Nf4–+) 9…Qg5 (9...Qg5 10.a3 Be4–+) 0–1. Ritter – Andre, corr SOK–90–61, 1990.

4.d4 e6 5.Qd3 +=.

4.Nf3 e6

5.e3 Bd6 6.d4 Nbd7 7.Be2 Qe7 8.0-0 0-0 9.Qd3 e5 10.e4 c6 =+.

5.e3 Bd6 6.d4 Nbd7 7.Be2 Qe7 8.0-0 0-0 9.Bd3 c5 10.bc6 bc6 =.

5.e3 Bd6 6.Be2 e5 7.0-0 0-0 8.Bb2 Bf5 9.d3 a4 10.a3 Nbd7 =+.

3.c4 c6

4.Ba3 g6 5.Nf3 Bg7 6.Nc3 0-0 7.e4 d6 8.d4 Bg4 9.Be2 Nbd7 10.bc6 bc6 11.h3 Bf3 12.Bf3 Nb6 (12...Rb8 13.Rb1=) 13.Qe2 (13.Qd3 Rb8+=) 13...Qc7 (13...Nh5 14.Rd1 Nf4 15.Qf1+=) 14.c5 (14.0-0 Rfb8+=) 14...Nc8 (14...dc5!? 15.Bc5 Nfd7 16.Be7 Bd4=) 15.0-0+= Rd8 16.Rab1 Na7 (16...dc5 17.e5 Nd7+=) 17.Rb6 (17.cd6!? ed6 18.Rfc1+/–) 17...Nd7 18.Rfb1 Bd4 (18...dc5!? 19.Rb7 Qc8+=) 19.cd6= ed6 20.Rb7 Qc8 21.Bd6 Nb5 22.R1b5 cb5 23.Rc7 (23.Rc7 Qa6 24.e5=). Grehl,Siegfried – Bedbur,Heinz, corr SOK–92–78, 1992.

4.a4 e5 5.Bb2 Bc5 (5...e4 6.Nc3=) 6.e3 (6.Be5 Bf2 7.Kf2 Ng4 8.Ke1 Ne5–/+) 6...d6+= 7.Nf3 (7.d4 Bb4 8.Bc3 0-0+=) 7...0-0 (7...e4 8.d4 Bb4 9.Nfd2=) 8.d3 (8.d4 Bb4 9.Nc3 e4=) 8...Re8 (8...Nbd7 9.Be2=) 9.Be2= Bb4 10.Nc3 d5 (10...e4 11.Nd4=) 11.0-0 d4 12.Na2 c5 13.Nd2 Bd2 14.Qd2 Qc7 (14...Bg4 15.Rae1=) 15.Rae1 Bf5 (15...Nbd7 16.f4=) 16.Qd1 de3 (16...Qe7 17.f4 ef4 18.ed4 Qe3 19.Kh1 cd4 20.Nc1+/–) 17.fe3+= Bg6 18.Rf2 (18.Nc3 Qd6+=) 18...Nbd7= 19.Nc3 Rad8 20.Qc1 (20.e4 b6=) 20...Nb6 (20...Qd6 21.Rd1=) 21.e4 Qd6 22.Qc2 Nbd7 23.Ref1 b6 24.Bc1 h6 25.Kh1 Kh7 26.Bd2 Re6 27.Nd5 Ree8 28.Qc1 Nd5 29.cd5 Rf8 30.Bg4+= Nf6 31.Bf5 Ng8 32.Bg6 Kg6 33.Qd1 f6 34.Qg4 Kh7 35.Rf3 Ne7 36.Qh5 f5 37.g3 Qf6 38.Bc3 g6 39.Qh3 g5 40.Rf5 Nf5 41.Rf5 Qg6 42.Re5 g4 43.Re7= Rf7 44.Qh4 Rdf8 45.Be5 c4= 46.Rf7 Qf7 Threatening mate: Qf1 47.Bf4 Qg7 48.dc4 Qa1 49.Kg2 Qa2 50.Kg1 The mate threat is Qxh6 50...Qa1 ½–½. Poschmann,Hans – Schulz,Hans_Juergen, TT–04.19 TSC, 2002.

4.Bb2 c5 5.a4 (5.Nc3 e5=) 5...Qb6 (5...e6 6.e3=) 6.d4 e6 (6...cd4 7.Qd4 Qd4 8.Bd4=) 7.dc5 Qc5 (7...Bc5 8.e3=) 8.Qc2 (8.e3 d6+=) 8...d5 9.Bf6 gf6 10.e3 Nd7 11.Nf3 Nb6 12.Nfd2 (12.Nbd2 Bd7=) 12...e5 13.Nb3 (13.Nc3!? Be6 14.cd5 Nd5 15.Nde4=) 13...Qb4=+ 14.N1d2 Be6 15.c5 Nc4 (15...Rc8 16.c6–/+) 16.Bc4 (16.Rc1 Rc8=+) 16...dc4–/+ Black gets strong play along the open d–file 17.Nc1 Bc5 (17...Rd8 18.Na2 Qc5 19.Nc3–/+) 18.0-0 (18.Na2 Qa3 19.Nc4 Bc4 20.Qc4 Bb4 21.Ke2 Qb2 22.Kf3+=) 18...Rd8–/+ 19.Nc4?? (better 19.Ne4 Be7 20.Rb1=+) 19...Bc4 (better 19...Qc4!? 20.Ra2–+) 20.Rb1 Qb1?? (better 20...Rd2 21.Qf5 Qa4 22.Qf6 Rg8 23.Qe5 Be7–+) 21.Qb1= Bf1 22.Kf1 0-0 23.Ne2 (23.Nb3 Bb4+=) 23...Rd2= 24.Ng3 Rfd8 25.Qf5 Ra2 The mate threat is Rd1 26.Qb1 Rdd2 27.Ne4 Rdb2 (27...Rdc2 28.g4=+ (28.Nc5?? Rf2 29.Kg1 Rg2 30.Kh1 Rh2 31.Kg1 Rag2 32.Kf1 Rb2 33.Qb2 Rb2–+)) 28.Qd1= (28.Nf6 Kg7 29.Qh7 Kf6 30.Qh8 Ke6 31.Qc8 Kd5 32.Qb7 Kc4 33.Qf7 Kb4–+) 28...Bb6 (28...Be7 29.Qg4 Kf8 30.Qc8 Kg7 31.Qg4 Kh6 32.Qh4 Kg6 33.Qg4 Kh6 34.Qh4 Kg6 35.Qg4 Kh6=) 29.Nf6 (29.g4 f5 30.gf5 Be3 31.Qd8 Kg7 32.Qf6 Kg8 33.Qe5 h5 34.Qg3 Kf8 35.Qe3 h4+–) 29...Kg7 (29...Kh8!? 30.Ke1 Bc7+=) 30.Ne4+= f5?? (better 30...Rc2+=) 31.Qd7+– Kf8 Do you see the mate threat? 32.Qd6 Kg7 (32...Kf7 33.Qf6 Ke8 34.Qe6 Kf8 35.Qf5 Ke8 36.Qe5 Kd7 37.g3 Be3 38.Nf6 Kc8 39.Qe6 Kb8 40.Qe3 Rf2 41.Qf2 Rf2 42.Kf2+–) 33.Qf6 (33.Qe7 Kg6 34.Qf6 Kh5 35.Qg5) 33...Kg8+– Threatening mate: Rb1 34.Qe6 Kg7 (34...Kf8 35.Qf5 Kg8+–) 35.Qe7 Kg8 (35...Kg6 36.Qf6 Kh5 37.Qg5) 36.Nf6 Kh8 37.Qh7 1–0. aravind555 (1660) – ThisUsernameForRent (1650), lichess.org, 2019.

4.Nc3 d5 5.cd5 cd5 6.d4 =.

4.Nc3 e5 5.e3 Bb4 6.Bb2 d5 7.a3 Bc3 8.dc3 Bg4 9.Be2 Be2 10.Qe2 cb5 11.cb5 Nbd7 12.Nf3 Qc7 13.0-0 Nb6 14.Rac1 Nc4 15.a4 0-0 16.Qc2 e4 17.Nd4 Ng4 18.g3 Nge5 19.Rcd1 Rac8 20.Bc1 Qc5 21.Nb3 Nf3 22.Kg2 Qd6 23.Nd2 Ncd2 24.Bd2 Qf6 25.Rc1 Rc4 26.Rfd1 Ng5 27.h4 Qf3 28.Kf1 Nh3 29.Be1 Qh1 30.Ke2 Ng1 31.Kd2 Nf3 32.Ke2 Nh2 33.Bd2?? Qf3 34.Ke1 Ng4 (34...Ng4 35.Qe4 Qf2) 0–1. Rush,Bradley – Molano,Ismael, ZL–2011–0-00994, 2011.

4.Nc3 e6 5.Bb2 Be7 (5...d5 6.e3=) 6.Nf3 (6.e4 d6=) 6...0-0 (6...d5 7.e3=) 7.e3 b6 (7...cb5 8.cb5 d5 9.Rc1=) 8.Be2 Bb7 9.0-0 d6 (9...d5 10.Rc1=) 10.d4 Nbd7 11.a4 cb5 12.cb5 Rc8 13.Rc1 Nd5 (13...Ne4 14.Bd3 Ndf6 15.Qe2=) 14.Nd5 Bd5 15.Qd2 (15.Qd3 Nf6=) 15...Nf6 16.Rc8 Qc8 17.Rc1 Qd7 (17...Qd8 18.Qc2=) 18.Qc2 (18.Qc3 Qd8=) 18...Bd8 (18...Be4 19.Bd3 d5 20.Ne5+=) 19.Nd2+= Bb7 20.e4 h6 (20...Ne8 21.Bd3+=) 21.Bf3 Be7 22.Qb1 Rc8+= 23.Rc2 d5 24.e5 Nh7 25.Qc1 Nf8 26.Rc8 Qc8 27.Qc8 Bc8 28.Bd1 Ng6 29.g3 Bb4 30.Nf1 Bd7 31.f4 Be8 32.Kf2 Ne7 33.Bc2 f6 34.Kf3 Bg6= 35.Bg6 Ng6 36.Ne3 f5 37.Nd1 Kf7 38.Ke3 Nf8 39.Nf2 h5 40.h4 Ke8 41.Nd3 Be7 42.Bc3 Nd7= 43.Nf2 Nf8 44.Nh3 (44.Nd1 Ng6=) ½–½. Liepert,Luise – Lueckerath,Kristiane, BL (Women) Germany, 1993.

4.Nc3 g6 5.Bb2 (5.e4 cb5 6.cb5 d5=) 5...Bg7 (5...d6 6.d4=) 6.e3 (6.Ne4 d6=) 6...0-0 7.Qc2 (7.d4 d5=) 7...d5 8.Nf3 Bf5 9.Bd3 (9.Qa4 dc4 10.Bc4 Bd3=) 9...Bd3 10.Qd3 Ne4 (10...a4 11.a3+=) 11.cd5 (11.Ne4? Bb2 (11...de4?! 12.Qd8 Rd8 13.Bg7–/+) 12.Rb1 de4 13.Qe4 Ba3–+) 11...cd5 12.Rb1 (12.Rc1 Nc5 13.Qc2 Qd7=) 12...Nc3 (12...Nc5 13.Qc2=) 13.Bc3+= e6 (13...Bc3 14.dc3 e6 15.0-0+=) 14.Bg7 Kg7 15.0-0 Nd7 16.Qd4 (16.Rfc1 Rc8+=) 16...Kg8 (16...Qf6 17.Qg4=) 17.Rbc1 b6 (17...Rc8 18.Rc8 Qc8 19.d3+=) 18.Rc6 Nc5 (18...Rc8 19.d3+=) 19.Rc1+/– Rc8 (19...a4 20.d3+/–) 20.Ne5 f6 21.Rc8 Qc8 22.Nd3 Qd7 (22...Qb7 23.Nc5 bc5 24.Rc5+/–) 23.Nc5+– bc5 24.Qc5 (24.Qc5 a4 25.Qc6+/–; 24.Rc5 Qb7+–) 1–0. Sammy8 (1815) – Orangattackman, internet, 2005.

4.e3 d6 5.Nf3 (5.d4 e5=) 5...e5 (5...cb5 6.cb5 e5 7.Bb2=) 6.Bb2 (6.d4 e4 7.Ng5 h6–/+) 6...Be7 (6...cb5 7.c5=) 7.Be2 (7.d4 e4 8.Nfd2 0-0+=) 7...e4 (7...cb5 8.c5+=) 8.Nd4 d5 (8...c5 9.Nb3+=) 9.0-0= c5 10.Nc2 (10.Nb3 dc4 11.Bc4 a4=) 10...0-0 (10...dc4 11.Nba3+=) 11.d4 dc4 (11...Nbd7 12.Nc3=) 12.Nd2 (12.dc5 Bc5 13.Bc4 Bg4 14.Qd8 Rd8 15.Bf6 gf6+=) 12...Qb6 (12...Be6 13.Bc4 Bc4 14.Nc4=) 13.a4 (13.Bc4 Rd8=) 13...Rd8 14.Rc1 c3 (14...Be6 15.Nc4 Qc7 16.Qd2=) 15.Bc3 Nbd7 (15...Be6 16.Nc4 Bc4 17.Bc4+=) 16.Na1 (16.Nc4 Qc7+=) 16...cd4 (16...Qd6 17.Nab3 cd4 18.Nd4=) 17.Bd4 Qe6 18.Bc4 Qf5 19.f3 ef3 20.Qf3 Qf3 21.Nf3 b6 22.Ng5 Rf8 23.e4 Bb7 24.Bf7 Rf7= 25.Nf7 Be4?? 26.Ne5 Ne5 27.Be5 Rd8 28.Rfe1 Ba3 29.Rc7 Bg6 30.Nb3 Rd3 31.Rc8 Kf7 32.Nd4 Bb4 33.Rc7 Kg8 34.Rec1 Ne8 35.Rc8 (35.Rc8 Bd2 36.R1c4+–) 1–0. Milde,Lars – Schulz,Hans_Juergen, TT–05 TSC, 2003.

4.e3 Ne4 5.d3 Nc5 (5...Nf6 6.Nf3=) 6.Nf3 e6 7.Bb2 (better is 7.d4 Ne4 8.Ba3+=) 7...Qf6?? (better is 7...cb5 8.cb5 d5+=) 8.Bf6+– gf6 9.Qc2 Bg7 (9...d6 10.d4 Ncd7 11.Nbd2+–) 10.d4 f5 11.Nc3 d5 12.dc5 dc4 13.Bc4 Nd7 14.bc6 bc6 15.0-0 Nc5 16.Rab1 Bd7 17.Na4 Ne4 18.Bd3 Nf6 19.Nc5 Rd8 20.Nd7 Rd7 21.Qc6 Ke7 22.Qc5 Rd6 23.Rb7 (23.Rb7 Nd7 24.Bb5+–) 1–0. Fournier,Frederic (1730) – esaubeat, Active, 2007.

4.Nf3 cb5 5.cb5 d5 6.e3 (6.Bb2 e6=) 6...Bg4 7.Ba3 (7.d4 Nbd7=) 7...Nbd7 8.h3 (8.d4 Rc8=) 8...Bf3+= 9.Qf3 e6 (9...e5 10.Bf8 Nf8 11.Nc3+=) 10.Bf8= Nf8 11.Be2 (11.Nc3 Ng6+=) 11...Ng6+= 12.0-0 0-0 (12...Qc7 13.g3+=) 13.Nc3 (13.d4 Rc8=) 13...Qd6 14.g4 (14.Rac1 Nh4 15.Qg3 Qg3 16.fg3 Nf5+=) 14...Rfc8+= 15.g5 Nd7 16.Rac1 Nde5 17.Qh1 (17.Qg3 d4 18.ed4 Qd4+=) 17...Nc4 18.Rfd1 (18.Bc4 Rc4 (worse is 18...dc4 19.Qb7 Rab8 20.Qe4=) 19.Qg2 Rac8–/+) 18...Nh4 19.Qh2 (19.Bc4 Rc4 20.Ra1 Rac8–/+) 19...Qa3 20.Rc2 Nd2 21.Rdd2 Rc3 22.Qe5 Rcc8 23.Qd4 Nf5 Black gets in control 24.Qb6 Qe7–+ 25.Kf1 Nd6 26.Bd3 Nc4 27.Bc4–/+ Rc4 28.Rc4 dc4 29.a4 c3 30.Rc2 Rc8 31.Ke2 e5 32.Qa5 Qa3 33.Kf3 Qb3 34.Rc1 Qd5 35.Kg3 e4 36.Qb4 Qg5 37.Kh2 Qd5 38.Kg2 Qd2 Black plans c2 39.Qa3 c2 40.a5 Qd1 41.Qb2 Qe2 42.Kg1 Rc5 Do you see the mate threat? 43.h4 h6 44.Qb3 g5 45.h5 g4 (45...g4 46.Rc2 Rc2 47.Qc2 Qc2–+) 0–1. Magat – Pommerel,Wim, email 4AMM–05, 1997.

4.Nf3 e6 5.e3 Be7 6.Be2 0-0 7.0-0 d5 8.Nc3 (8.cd5 Nd5 9.d4 cb5 10.Bb5 Bd7=) 8...Ne4 (8...dc4 9.Bc4 cb5 10.Nb5=) 9.Bb2 Nd7 (9...Nc3 10.Bc3 cb5 11.cb5+=) 10.Qc2 Bf6 (10...Ndc5 11.Rab1+=) 11.Rab1 (11.d4 Nc3 12.Bc3 cb5 13.cd5 ed5 14.Bb5 Be7+=) 11...Nc3 12.Bc3 Bc3 13.Qc3 c5 (13...cb5 14.cb5 b6 15.Rbc1+=) 14.cd5 (14.d4 b6+=) 14...ed5 15.b6 Qe7 16.Rb5 (16.Rfc1 a4+=) 16...Qd6 17.Rfb1 (17.Qa3 A) worse is 17...Nb6 18.Qc5 (18.Rc5? Nc4 19.Bc4 dc4–+) 18...Qc5 19.Rc5+/–; B) 17...Qe6=) 17...Ra6 (17...a4 18.d4 c4 19.e4 de4 20.Nd2+=) 18.h3 (18.Ra5 Rb6 19.Rc1 Qg6+=) 18...Re8= 19.Ra5 d4 20.Qa3 Rb6 21.Rb6 Qb6 22.Bb5 de3 23.de3 Qf6 (23...Qd6 24.Qd3 Qc7 25.Ra8=) 24.Bd7 (24.Qd3 Qa1 25.Qf1 Qf6+=) 24...Bd7 25.Rc5 Bh3 26.Qb4 (26.gh3 Qf3) 26...Qa1 (26...Be6 27.Nd4 Ba2 28.Qb7=) 27.Kh2+= Bc8 (27...Be6 28.Ra5+=) 28.Qe4 Be6 (28...Re4?? 29.Rc8 Re8 30.Re8) 29.Qb7 (29.Ng5 g6+=) 29...Qa2= (29...Ba2?? 30.Rc8 h6 31.Re8 Kh7 32.Qa8+–) 30.Qc6 Rd8 31.Rc2 Qa5 32.Nd4 Qg5 33.Qf3 Bd5 34.Qg3 Qh5 35.Qh3 Qe5 36.Qg3 Qh5 37.Qh3 Qe5 38.Qg3 Qh5 ½–½. Nokarookoff – PeterRs, ChessWorld.net, 2006.

4.a4 d5

5.d4 dc4+= 6.e3 cb5 7.ab5 e5 8.Bc4 ed4 9.Bb2 (better is 9.Qd4!? Be6 10.Be6 fe6 11.Ne2=) 9...Bb4–/+ 10.Kf1 Be6 (10...de3!? 11.Qd8 Kd8 12.fe3 Ke7–+) 11.Be6+= fe6 12.Qd4 Qd7 13.Qd7 Nbd7 (worse is 13...Nfd7 14.Bg7 Rg8 15.Bc3+=; 13...Kd7?! 14.Bc3 Bc3 15.Nc3+=) 14.Ba3 Ba3 15.Ra3 0-0 16.Nd2 (16.Ke2 Rfc8 17.Nf3 Rc2 18.Nbd2 e5=) 16...Ng4 (16...Rfc8!?–/+) 17.Ngf3= Rac8 18.Ke2 b6 19.h3 Nge5 20.Nd4 Nc4 21.Ra2 Kf7 22.Rc1 Nd6= 23.Rac2 Rc2 24.Rc2 Nc5 25.f3 e5 26.Nc6 Ke6 27.Na5 Nb5 28.Nac4+/– Nd7 29.Nb6! Re8 30.Rc6+– Ke7 31.Nd5 Kf7 32.Nc7 Rc8+/– 33.Nb5?? Rc6–/+ 34.Ne4 Nf6 35.Nf6 gf6 36.Kf2 f5 37.g4 Kg6 38.h4 fg4–+ 39.fg4 Rc4 40.Kf3 h5 41.gh5 Kh5 42.Nd6 Rh4 43.Nf5 Ra4 44.Ng3 Kg6 45.e4? Ra3 46.Kg4 Re3 47.Kh4 Rf3 48.Kg4 Rf4 49.Kh3 Kg5 50.Kg2 Kg4 51.Nh1 Re4 52.Nf2 Kf4 53.Ne4 Ke4 54.Kf2 Kd3 55.Kf3 e4 56.Kf2 Kd2 0–1. Baer,Cy (1895) – Bertram,Mike (2050), CiF, 2007.

5.cd5 cb5 6.ab5 Nd5 =.

5.cd5 Nd5 6.Nf3 Bf5 =.

5.e3 e5 6.Bb2 Bd6 7.d3 (7.d4 Bg4 8.f3 Bb4 9.Ke2 Be6 10.de5 Ng8=) 7...0-0 8.Nf3 Bg4 9.Be2 Nbd7 10.Nbd2 Rc8 11.0-0 cb5 (11...Qc7 12.Rc1+=) 12.cb5 (12.ab5 Qc7=) 12...Re8 13.h3 Bh5 14.Re1 Bg6 (14...Nb6 15.Rc1+=) 15.Nb3 (15.Nh4 Nf8+=) 15...Bb4+= 16.Nfd2 (16.Rf1 Bf5+=) 16...Bc3 (16...Nb6 17.f4 e4 18.Nc1–/+) 17.Bc3+= Rc3 18.Rc1 Qc7 19.Rc3 (19.Nb1 Rc1 20.Qc1 Qd8=) 19...Qc3 20.Qc1 (20.d4 Bc2 21.Qc1 Ne4=) 20...Qb4+= Black prepares e4 21.Qa1 Nb6 22.Rc1 Na4–/+ 23.d4 e4 24.Rc2 h6 25.Qc1 Bf5 26.Nc5 Nc5 27.Rc5 a4 28.Qc3 Qc3–+ 29.Rc3 Ra8 30.Nb1 Ra5 31.Na3 Ne8 32.Rc5 Be6 33.Kf1 Kf8 34.Ke1 Ke7 35.Kd2 Nd6 36.Kc3 White gets the initiative 36...Nc8 37.Rc7= Kd6 38.Rb7 Ne7 39.b6+= Bd7 40.Kb4 Nc6= 41.Kc3 Ra8 42.Nb5 Ke7 43.Bg4 Rd8 44.Na7 Na5 45.Rc7 Kd6 46.Kb4 a3? 47.Ka5 a2 48.Rc1 (48.Rc1 Bg4 49.hg4+–) 1–0. Bakkers,Max JTh – Bedbur,Heinz, corr SOK–90–57, 1990.

5.e3 e5 6.d4 ed4 7.Qd4 Bb4 8.Bd2 +=.

5.e3 Bf5 6.cd5 cd5 (worse is 6...Qd5 7.Nc3 Qd7 8.Nf3+=) 7.d4 (7.Nf3!?=) 7...e6–/+ 8.Bd2 Bd6 9.Nf3 Nbd7 10.Nc3 Rc8 11.Nh4 Bg4 12.Be2? (12.f3 Rc3 13.Bc3 Ne4–+) 12...Be2 (better is 12...Rc3!? 13.Bg4 Rd3–+) 13.Ne2–/+ Ne4 14.Nf3 0-0 15.0-0 Ndf6 16.Rc1 b6 17.Rc8 Qc8 18.Qb1 (better is 18.Ne5!? Be5 19.de5–/+) 18...Qc4–+ 19.Ng3 Qa4 20.Rc1 Nd2 21.Nd2 Bb4 (21...Qb4 22.Rc6 Rb8 23.Qc2–+) 22.Ngf1 (22.Nf3 Qb5 23.Ne5 Qa4–+) 22...Qb5 23.Qc2? (23.Nf3 Qa6–+) 23...h6 (23...a4 24.Nf3–+) 24.Rb1 (24.Qb2 Qa6 25.Nf3 Rc8–+) 24...Qd7 25.Qb2 Rc8 26.Nb3 (26.Nf3 Qa4 27.Rc1 Rc1 28.Qc1 Qe8–+) 26...Ne4 27.Nfd2 (27.Nc1 Nc3 28.Ra1 Qb5–+) 27...Nd2 (better is 27...Bc3 28.Qa2 Bd2 29.Nd2–+) 28.Nd2 Bd2 (28...Qa4!? 29.Nb3–+) 29.Qd2 Qc6 30.Qb2 (30.h3–+) 30...Qc2 31.h3 Qb2 32.Rb2 Rb8 33.Kf1 Kf8 34.Ke2 Ke7 35.Kd3 Kd6 36.Kc3 b5 37.Kb3 Kc6 38.Rc2 Kb6 39.f3 Rb7 (better is 39...Kb7 40.Ra2 Ra8 41.g3–+) 40.e4 (40.Rc8–+) 40...Rc7 41.Rd2 (41.Re2 a4 42.Kb2 Rc4–+) 41...a4 42.Ka3 (42.Kb2 b4–+) 42...Rc3 43.Ka2 b4 44.Rb2 (44.Kb2–+) 44...Kb5 0–1. Kolodziejski,D (1800) – Wojtaszek,Radoslaw (2000), Poland–chT2 U18, 1996.

4.a4 g6

5.Bb2 Bg7

6.d4 cb5 7.ab5 d5 8.e3 =.

6.d4 d5 7.e3 0-0 8.Nf3 cb5 (8...Nbd7 9.Nc3=) 9.cb5 (9.ab5 Bg4=) 9...Bg4 10.Be2 Nbd7 11.0-0 Rc8 (11...Nb6 12.Nbd2=) 12.Nbd2 Nb6 13.Qb3 Ne4 14.Bd3 Bf3 15.Nf3 Nc4 16.Qa2 e6 (16...Qd6 17.Rfc1 Qe6 18.Rc2=) 17.Rac1+= Nb2 18.Qb2 Nc5 19.Bc2 Nd7 20.Bd3 (20.Qa3 Qf6=) ½–½. Poschmann,Hans – Pommerel,Wim, email 4AMM–F, 1998.

6.e3 0-0 7.Nf3 d5 8.d4 Ne4 9.Bd3 f5 (9...Nc5 10.Be2=) 10.0-0 e6 (10...Be6 11.Qc2=) 11.Nbd2 Nd7 12.Ba3 Rf7 13.Rc1 g5 (13...e5 14.cd5 cd5 15.Bb2 Nd2 16.Qd2–+) 14.h3 h5 (14...e5 15.cd5 cd5 16.Bb2 Nd2 17.Qd2–+) 15.Nh2 (15.bc6 bc6 16.cd5 cd5+=) 15...g4 16.Be4 (16.cd5!? cd5 17.hg4 hg4 18.Be4 de4 19.Nc4+=) 16...de4+= 17.hg4 hg4 18.Ng4 (18.Bb2=) 18...Qh4 (18...fg4 19.Qg4 cb5 20.cb5 Nb6 21.Ne4 e5=) 19.bc6 (19.Nh2 e5 20.d5 cd5 21.cd5 Nf6+/–) 19...bc6 20.Nh2 Bd4?? (better is 20...e5+=) 21.Re1 (21.ed4 Rh7 22.Bd6+/–) 21...Rh7 (21...Be5 22.Ndf1–/+) 22.Ndf1 (22.ed4 Qh2 23.Kf1 e5=) 22...Bc5 (22...Bg7 23.Qd6 Ne5 24.Bb2+=) 23.Bb2 (23.Bc5!? Nc5 24.g3+=) 23...Bb4 24.Re2 (24.Bc3 e5–/+) 24...Ba6 25.Ba1 (25.Qc2 Bd6 26.g3 Qh6–/+) 25...Rd8 26.g3 (26.Rb2 Ba3 27.g3 Qh3–+) 26...Qe7 27.Qc2 Nb6 28.Qa2 (28.Nd2 e5–+) 28...Rd3 (28...e5 29.g4–+) 29.Bb2 c5–+ (29...c5 30.f3 Qd7–+) 0–1. Trokenheim,Marek – Sulmad,Martti, corr SSKK 1–431, 1990.

6.e3 d6 7.f4 Nbd7 (7...0-0 8.Nf3+=) 8.Nf3= Nb6 9.Be2 Qc7 10.Na3 0-0 11.0-0 Nbd7 12.Qe1 c5 13.Qh4 b6 (13...Rb8 14.d3+=) 14.d3+= Bb7 15.e4 Rae8 16.g4 White plans f5 16...e5 (16...Nh5 17.Bg7 Ng7 18.Ng5+=) 17.f5 (17.g5 Nh5 18.fe5 de5+=) 17...h6 (17...gf5 18.gf5 Kh8 19.Kh1+=) 18.Bc1 Qd8 (18...g5 19.Qh3=) 19.Bh6 (better is 19.fg6!? fg6 20.Bh6+/–) 19...Bh6= 20.Qh6 Ng4 21.Qh3 Ngf6 22.Kf2 Kg7 23.Rg1 Rh8 24.Qg2 Rh6 25.Raf1 Reh8 26.Nc2 Nh5 27.h4 Nf4+= 28.Qg3 Nf6 29.Ne3?? Be4!–+ Black gets the initiative 30.fg6 Rg6 31.Qh2 Bd3 32.Bd3 Nd3 33.Ke2 Nf4 34.Ke1 Kf8 35.Rg6 Ng6 36.Qd2 e4 37.Ng5 Nh4 38.Qc3 Nf3 39.Nf3 ef3 40.Rf3 Rh1 41.Nf1 Ne4 42.Qe3 Qh4 43.Kd1? Qg4 44.Ke1 f5 45.Kd1?? Rf1 (45...Rf1 46.Kc2 Qg2 47.Rf2 Qf2 48.Qf2 Rf2 49.Kd1 Rd2 50.Ke1 f4 51.Kf1 f3 52.Kg1 d5 53.cd5 Ng3 54.d6 Rg2#) 0–1. Ulaneo,Ruben – Frontan,F, URU–chT Uruguay, 1988.

6.Nf3 0-0 7.e3 d5 8.Be2 cb5 9.cb5 b6 (9...Bg4 10.0-0=) 10.0-0 Nbd7 (10...Bg4 11.Nc3=) 11.d4 Bb7 (11...Ne4 12.Nbd2+=) 12.Nbd2 (12.Nc3 Rc8+=) 12...Rc8 13.Nb3 (13.Rc1 Rc1 14.Bc1 Ne4+=) 13...Ne4= 14.Qd3 h6 15.Rac1 Kh7 (15...Ndf6 16.Ne5+=) 16.Ba3 Re8 17.Nfd2 (17.Rc8 Qc8 18.Rc1 Qb8+=) 17...f5 (17...e5 18.Rc8 Bc8 19.Ne4 de4 20.Qc2+=) 18.f3 (18.Rc8 Bc8 19.Ne4 fe4+=) 18...Nef6 (18...Nd2 19.Qd2 e5 20.Rc8 Bc8 21.Rc1+=) 19.Rc8 (19.f4 Rc1 20.Rc1 Ne4+=) 19...Qc8 (19...Bc8 20.f4+=) 20.Rc1 (20.f4 Qc7+=) 20...Qb8 (20...Qd8+=) 21.Nf1 (21.f4 Qa8+=) 21...e5= 22.de5 (22.Qb1 Rc8=) 22...Ne5 (22...Qe5 23.Qc2=) 23.Qd1 Rc8 (23...Rc8 24.Nfd2 Rc1 25.Qc1 Qe8+=). StephenHilton – GmLencioni (1605), internet, 2006.

6.g4 0-0 7.g5 Nh5 8.Bg7 Ng7 9.h4 d5 10.c5 Bf5 11.d4 Nd7 12.b6 (12.e3!?=) 12...e5+= 13.e3 ed4 14.ed4 Re8 15.Be2 Qe7 16.Nc3 Nc5 (16...Be4!? 17.Rh3 Rad8+=) 17.dc5= Qc5 18.Rc1 Qb6 (18...d4 19.Ne4 Qb4 20.Nd2 d3–/+) 19.h5? (19.Nf3 Rad8 20.Qd4 Qd4 21.Nd4 c5 22.Nf5 Nf5=) 19...Nh5 (19...d4 20.hg6 fg6 21.Nb1=) 20.Kf1 Re5 (better is 20...d4!? 21.Bh5 dc3–/+ (worse is 21...gh5 22.Nce2=)) 21.Bh5 gh5 22.Qh5 Bg6 23.Qh2 (23.Qh4!?=) 23...Qa6 (23...Bd3!? 24.Nge2 Rae8–/+ (24...Rg5?! 25.Rd1 Bg6 26.Qf4=)) 24.Nge2+= Rae8 25.f4 Re3 (25...Re2 26.Ne2 Be4 27.g6 Bg6 28.Rg1+=) 26.Kg1 d4?? (26...Re2 27.Ne2 Re2 28.Qg3–+) 27.Nd4?? (27.f5 Bf5 28.Nd4+=) 27...Rc3?? (better is 27...Qb6 28.Qd2 Rd3–+) 28.Rc3+– Qb6 29.Rd3?? Bd3 30.Qf2 Qb1 31.Kg2 Be4 32.Nf3 Bf3 33.Qf3 Qc2 34.Kg3 Qa4 35.g6 fg6 36.Kg4 Qc4 37.Rh2 Qe6 38.Kg3 Qe3 39.Rb2 Qf3 40.Kf3 b5 41.Rd2 b4 (41...b4 42.Rc2 Re6–+) 0–1. breaker – boa, ChessWorld.net, 2004.

4.Bb2 a4

5.e3 cb5 6.cb5 d5 7.Nf3 Bg4 (7...e6 8.Be2=) 8.h3 (8.Bf6 gf6 9.Nc3 e5+=) 8...Bh5 (8...Bf3 9.Qf3 Nbd7 10.Bf6 Nf6 11.Nc3=) 9.Be2 (9.Bf6 ef6 10.Be2 Nd7+=) 9...e6= 10.0-0 Bd6 11.a3 Nbd7 12.Nc3 Qa5 13.g4 Bg6 14.Rc1 0-0 (14...Nc5 15.d3=) 15.Nh4 Ne4 (15...Rfc8 16.Ng6 hg6 17.f4=) 16.Ng6+= fg6 17.Ne4 de4 18.d4 ed3 (18...Rac8 19.Qe1 Qe1 20.Rfe1+= (worse 20.Rce1 Rc2 21.Bc1 Rfc8–/+)) 19.Qd3+– (19.Bd3?! Be5 20.Bd4 Bd4 21.ed4 Rae8+=) 19...Be5 20.Be5 Ne5 21.Qd6 Nf3 (21...Nf7 22.Qe6 Kh8 23.Qd5+–) 22.Bf3+– Rf3 23.Rc8! Rc8 24.Qe6 Rf7 25.Qc8 Rf8 26.Qb7 Qc3 27.Qd5 Kh8 28.Qd6 Rg8 (28...Kg8 29.b6+–) 29.b6 h5 (29...Qb3+–) 30.Qg6 (30.Rb1 Qc2 31.Rb4 Qc8+–) 30...Qa3 (30...Rb8 31.Qh5 Kg8 32.Qd5 Kh7+–) 31.Qh5 1–0. DEFFM – GuestJBBC, freechess.org, 2018.

5.e3 d6 6.Nf3 e5 7.Be2 Be7 8.0-0 0-0 9.d4 e4 10.Nfd2 cb5 11.cb5 d5 12.Ba3 Ba3 13.Na3 Qd6 14.Nc2 Bf5 15.a3 Nbd7 16.Nb4 Nb6 17.Rc1 Rfc8 18.Rc8 Rc8 19.Qa1 Qc7 20.h3 h6 21.Rb1 Bd7 22.Qa2 Qc3 23.Kh2 Qc7 24.g3 Qd6+= 25.Rb2 Qe6 26.Bf1 Rc1 27.Bg2 Qd6 28.Bf1+= Qe6 29.Bg2 Qf5 30.Nb1?? Nc4 31.Rc2–/+ Rb1! 32.Qb1 Na3 33.Qb2 Nc2 34.Qc2 0–1. Melich,Jindrich (2075) – Garcia Del Rey,Senen (2315), X Calvia ESP, 2013.

4.Bb2 cb5

5.cb5 b6 6.a4 e6 7.e3 d5 8.Nf3 Be7 9.Be2 0-0 10.0-0 Nbd7 11.d4 Bb7 12.Nbd2 Ne4 13.Ne5 Ne5 14.de5 Nc5 15.Nf3 Rc8 16.Nd4 Ne4 17.Bd3 Bc5 (17...h6!?=) 18.f3+= White gets strong initiative 18...Bd4 (better 18...Ng5!?+=) 19.ed4+– (19.Bd4?! Nc5+=) 19...Qg5 (19...Ng5 20.h4 Nh3 21.gh3 Qh4 22.Qd2+–) 20.fe4 de4 21.Bc1 (better 21.Bb1!?+–) 21...Rc1+– 22.Qc1 (22.Rc1 Qe3 A double attack) 22...Qc1 23.Rac1 ed3 24.Rc7 Bd5 25.Rd1 Be4 26.Kf2 Rd8 27.Ke3 Bf5? (27...Bg2 28.Kd3 Bd5+–) 28.h3 (28.Rb7!? f6 29.ef6 gf6 30.Rb6 Kf7+–) 28...h5 29.g4! (29.Rd3?! Bd3 30.Kd3 Rb8+–) 29...hg4 (29...Bg4 30.hg4) 30.hg4 Bg6? (30...Bg4 31.Rd3 Rb8 32.Kf4+–) 31.Rc6 (31.Rb7 f6 32.ef6 gf6 33.Rb6 Kf7+–) 31...f6? (31...Rb8+–) 32.Re6 Rc8 (32...Bh7 33.g5 fe5 34.g6 (worse 34.Re5 Bg6+–) 34...Bg6 35.Rg6 Rd4 36.Rd3 Ra4 37.Rd7+–) 33.Rc6 (33.Rb6 Rc2 34.ef6 Ra2+–) 33...Rd8 (33...Rb8 34.g5 Be8 35.Rd6 fe5 36.de5+– (worse 36.Kd3 Bh5 37.Re1 ed4+–)) 34.Rb6 fe5 (34...Bh7 35.ef6 Re8 36.Kf2 gf6 37.Rf6+–) 35.de5 (better 35.Rg6!? Kh7 36.Re6 Rd4+–) 35...Rf8 (35...Bh7+–) 36.Rg6 (36.Rg6 Re8 37.Ke4+–) 1–0. BeepBeepImAJeep (2730) – ChessClock99 (2590), lichess.org, 2020.

5.cb5 b6 6.d3 e6 7.Nf3 Be7 8.e3 0-0 9.Be2 Bb7 10.0-0 d6 11.Nc3 Nbd7 12.a4 Rc8 13.Rc1 d5 14.Nd4 Bd6 15.g3 (15.f4 Qe7=) 15...Qe7 16.Bf3 Ba3 17.Ba3 Nc5?? (better is 17...Qa3 18.Qd2 Nc5=) 18.Nc6! Bc6 19.bc6 Rc6 20.d4 Rd8 21.dc5 bc5 22.Nb5 Rdc8 (22...Nd7 23.Nd4! Rc7 24.Nb3+–) 23.Rc2 (23.Qd2 Ra6+–) 23...Nd7 (23...Qb7 24.Bb2 Nd7 25.e4+–) 24.Na7 1–0. Salvatore – PeterRs, ChessWorld.net, 2006.

5.cb5 b6 6.e3 Bb7 7.f4 (7.Nf3 d5=) 7...e6 (7...d5 8.Nf3=) 8.Nf3 d6 (8...d5 9.Be2=) 9.Be2+= Nbd7 (9...Be7 10.Nd4+=) 10.Na3 (10.Nc3 Be7=) 10...Be7= 11.0-0 0-0 12.Nd4 Rc8 13.Rc1 Nc5 (13...d5 14.Nc6 Qe8 15.Ne7 Qe7 16.Nc2+=) 14.Nc4 (14.Nc6 Qd7+=) 14...Nfd7= 15.d3 d5 (15...Qc7 16.Nc6 Bc6 17.bc6 Qc6 18.d4=) 16.Nd2 (16.Ne5 Ne5 17.fe5 g6=) 16...Bf6 17.N2f3 (17.Ba3 e5 18.fe5 Ne5 19.Nf5+/–) 17...Qe7 (17...Qc7!?=) 18.Ba3+/– Qd8? (better is 18...Qe8+/–) 19.Nc6!+– (19.Nc6 Qe8 20.d4+–) 1–0. pierred (2750) – dubdub (2000), net–chess.com, 2008.

5.cb5 e6 6.e3 Be7 7.a4 0-0 8.Nf3 d5 9.Be2 b6 10.0-0 Bb7 11.d4 Nbd7 12.Nbd2 Rc8 13.Rc1 Nb8 14.Qb3 Qd7 15.Ne5 Qd6 16.Nb1 Qb4 17.Qa2 Nbd7?? (17...Rc1!? 18.Bc1 Qd6+–) 18.Ba3 (better 18.Nd3 Qd6 19.Ba3+–) 18...Qa4+– 19.Bd1 Rc1?? (better 19...Qb5 20.Rc8 Rc8 21.Be7 Ne5 22.de5 Ba6+–) 20.Ba4+– Rf1 21.Kf1 Ba3 22.Qa3 Ne5 23.de5 Nd7 24.f4 (better 24.Qd6!? Bc8+–) 24...Nc5 25.Nc3 Rc8 26.Bd1 Rc7 (26...h6 27.Na4 Na4 28.Ba4+–) 27.Ne2 (better 27.Na4 g5 28.Nb6 gf4 29.Qc3 fe3 30.Na4+–) 27...Bc8 28.Nd4 Bd7 29.Bc2 Nb7 (29...f6+–) 30.Qe7 (better 30.e4+–) 30...Bb5!!–+ 31.Nb5 Threatening mate: Qe8 31...Re7 32.Ke2 Nc5 33.Kd2 a4 34.Bb1 (34.Kc3–+) 34...Ra7 (better 34...Re8–+) 35.Na7+– Nb3 (35...h6 36.Kc3+–) 36.Kc3+– Nc5 (36...h6 37.Bc2+–) 37.Bc2 (37.Nc8 Nd7+–) 37...Kf8 (37...a3 38.Nb5+–) 38.Kb4 (38.Bh7?! g6+=) 38...Ke7 (38...g5 39.Nc8+– (39.Ba4?! gf4 40.ef4 Nd3 41.Kb5 Nf4+–)) 39.Ba4 (39.Nc8!? Kd8 40.Nb6 a3 41.Ka3 Kc7+–) 39...Nd3 40.Kc3 Ne1 41.g3 Nf3 42.h3 (42.h4 Nh2+–) 42...Ng1 43.Kd3 Nh3 44.Ke2 f6 (44...Kd8 45.Nb5 Ke7 46.Kf1+–) 45.Kf3 (45.Nc8!? Kd8 46.ef6 gf6 47.Nb6 d4+–) 45...fe5 46.Kg2 ef4 47.ef4 (47.Kh3?! fe3 48.Kg2 Kd6+=) 47...Nf4 48.gf4 Kf6 (48...Kd6 49.Nb5 Kc6 50.Nd4 Kd6 51.Bd1+–) 49.Kf3 g5 50.fg5 Kg5 51.Nc8 e5 (51...b5 52.Bb5 h6+–) 52.Nb6 d4 53.Ke4 h5 54.Bd1 h4 55.Nd7 h3 56.Ne5 Kh4 (56...d3 57.Ke3+– (worse 57.Nd3 h2 58.Bf3 Kh6+–)) 57.Nf3 (57.Kf4 h2 58.Bg4 h1Q 59.Ng6) 57...Kg3+– 58.Be2 (better 58.Nd4 h2 59.Nf5 Kf2 60.Bf3+–) 58...h2= 59.Nh2 Kh2 60.Kd3 Kg3 61.Bd1 Kf2 62.Bb3 Kg3 63.Bd5 Kf2 64.Be4 Kg3 65.Bf5 Kf2 66.Be6 Kg3 67.Bd5 Kh4 68.Bc4 Kg5 69.Bb3 Kf6 70.Kc2 Ke7 71.Bc4 Kf6 72.Bd3 Ke7 73.Kd2 Kf6 74.Ke2 Ke7 75.Kf3 Kf6 76.Kf4 Ke7 77.Ke5 ½–½. BeepBeepImAJeep (2660) – SunshineBand (2375), lichess.org, 2016.

5.cb5 d5

6.a4 Bf5 7.e3 e6 8.Nc3 Bb4 9.Nf3 0-0 10.Be2 Bc3 (10...Nbd7 11.Rc1=) 11.Bc3+= Ne4 12.Bb2 White fights for the Initiative 12...Nd7 13.0-0 b6 14.d3 Nef6 (better 14...Nec5!?+=) 15.Nd4+– Rc8 (15...Bg6!?+–) 16.Nc6+– (16.Nf5?! ef5 17.Rc1 Rc1 18.Qc1 Re8+–) 16...Qe8 (16...Qc7 17.g4 Bg6 18.g5+–) 17.Ba3 Nc5 (17...Kh8+–) 18.d4 Nce4 19.Ne7 Kh8 20.Nc8 Qc8 21.Bf8 Qf8 22.Rc1 g5 (22...Qd8 23.Bd3+–) 23.Bd3 Qh6 (23...Qb8 24.Be4 de4 25.Rc6+–) 24.f3 (24.Rc6 Ng4 25.h3 Ngf6 26.Be4 de4+–) 24...Nd6 25.Bf5 Nf5 26.Qd3 g4 27.e4 g3 The mate threat is Qxh2 28.h3 Ne3 29.Rfe1 Nc4 30.e5 (30.Rc2!? Kg7+–) 30...Nh5 31.Rc4 dc4 32.Qc4 (32.Qc3!? Qf8+–) 32...Qd2 Do you see the mate threat? 33.Qe2 Qd4 34.Qe3 Qb4 35.Rc1 (better 35.Qc1!? Qd4 36.Kh1+–) 35...Nf4 36.Rd1 (36.Kh1 Kg7+–) 36...Kg7 (36...Qa4 37.Rc1+–) 37.Qd2 (better 37.Qe4!? Nd5 38.Qb4 Nb4 39.Rd4+–) 37...Qa4+– 38.Qd8 Threatening mate: Qf6 38...Nd5 (38...Ng6 39.f4+–) 39.Qg5 Kf8 Threatening mate: Qxd1 40.Rc1 Nc3 (better 40...Ne7+–) 41.Qg3?? (better 41.Qd8 Kg7 42.Kh1+–) 41...Qd1 (better 41...Ne2 42.Kh2 Ng3 43.Kg3 Qb5 44.Rc8 Kg7–+) 42.Rd1+– Ne2 43.Kf2 (43.Kf2 Ng3 44.Kg3+–) 1–0. BeepBeepImAJeep (2590) – Amin_Cheraghi (2550), lichess.org, 2018.

6.Nf3 Bf5 7.e3 (7.Nc3 e6=) 7...Nbd7 8.Be2 e6 9.0-0 Bd6 (9...Rc8 10.Nc3=) 10.d4 (10.Nh4 Bb1 11.Rb1 Rc8=) 10...0-0 (10...Nb6 11.Bd3=+) 11.Nc3 (11.Ba3 Ba3 12.Na3 Qe7=) 11...Ne4 12.Ne4 Be4 13.Bd3 Nb6 14.Rc1 (14.Be4 de4 15.Nd2 Rc8=) 14...f5 (14...Bd3 15.Qd3 Nc4 16.Bc3=+) 15.Be2 Bf3 16.Bf3 Nc4 17.Bc3 Ba3 18.Rb1 Rc8 19.Qb3 Bd6 20.Rfc1 Rf7 (20...b6 21.a4=+) 21.b6 Rc6 22.Qa4 Qb8 23.g3 (23.h3=+) 23...f4 24.gf4= Bf4 25.ef4 Qf4 26.Bg2 Qf2 27.Kh1 Ne3 28.Rg1 Qf4 29.Qc6?? bc6–+ 30.b7 Rb7! 31.Rbf1 Nf1 32.Rf1 Qe3 33.Ba5 Qd4 34.Be1 Rb1 35.Rg1 c5 36.Bf2 Rg1 37.Bg1 Qd1 (38.h3 c4–+) 0–1. Thoma (2040) – Borrmann (1875), TT–17.51 ETC, 2005.

6.Nf3 Bg4 7.h3 (7.Bf6 ef6 8.e3 Bd6=) 7...Bf3=+ 8.ef3 Nbd7 9.d4 e6 10.Nd2 Bb4 11.Rc1 h5 (11...0-0!?=+) 12.a3 Bd6 13.Rc2 0-0 14.Bd3 Qe7 15.Nb1 h4 16.Bc1 Nh5 17.0-0 Bb8 18.Qd2 (18.a4!?=+) 18...Qd6–/+ 19.f4 Nf4 20.Qf4 Qf4 21.Bf4 Bf4 22.Nd2 Bd2 23.Rd2 Rac8 24.Rfd1 Rc3 25.Ra2 Rfc8 26.Kf1 Nf6 27.a4 g6 (27...Nh5 28.Rdd2–+) 28.Raa1 Kg7 29.b6 Nd7 30.Ke2 Rb3 31.Rdb1 Rcc3 32.Rb3 Rb3 33.Rc1 Nb6 34.Rc5 Na4 35.Ra5 Rb4 36.Bc2 Nc3 37.Kd3 Ne4 38.Ke3 Nd6 39.Ra1 Nb5 0–1. pierred (2825) – pcmvr, net–chess.com, 2016.

6.e3 Bf5

7.Nf3 Nbd7 8.Be2 e6 9.0-0 Bd6 10.Nc3 0-0 11.d3 Rc8 (11...e5 12.e4 Be6 13.ed5 Bd5 14.Nd5 Nd5 15.Rc1=) 12.Rc1 (12.Nh4 Bg6=) 12...h6 (12...e5 13.Qb3=) 13.Na4 (13.Qd2 Bg4=) 13...Qe7 (13...Rc1 14.Qc1 e5 15.Qd2=) 14.Qb3 (14.Bc3 Bb4=) 14...e5 15.Rc2 (15.b6 Bg4=) 15...d4 (15...Be6 16.d4 e4 17.Ne5=) 16.Rc8= (worse is 16.ed4 Be6 17.Rc4 Bc4 18.dc4 ed4 19.Nd4 Rfe8–/+) 16...Rc8 Black fights for the Initiative 17.Rc1 (17.ed4!? Be6 18.Qd1 Ba2 19.de5 Ne5 20.Qa1 Nf3 21.Bf3+=) 17...Rc1+= 18.Bc1 de3 19.Be3 Ng4 20.Bd2 Nc5 21.Nc5 Bc5 22.Ba5 (better is 22.Be1=) 22...Nf2–+ 23.Kf1 Ng4 24.Bd2 Nh2! 25.Ke1 Ng4 26.Kd1 e4 27.de4 Qe4 28.Qc4 Qb1 29.Qc1 Bc2 30.Ke1 Qa2 (30...Qa2 31.Kf1 Qb3–+) 0–1. Schuehler,Ernst – Pommerel,Wim, email 4AMM, 1998.

7.Nf3 e6 8.Nc3 Bd6 9.Qb3 (9.Be2 0-0=) 9...Nbd7+= 10.d4 Nb6 (10...0-0 11.Rc1+=) 11.a3 (11.Ba3 a4 12.Qb2 0-0+=) 11...a4 12.Qa2 (12.Qd1 0-0+=) 12...Ne4 (12...0-0 13.Rc1+=) 13.Be2 (13.Rc1 Nc3 14.Rc3 Rc8+=) 13...Rc8 14.Rc1 0-0 15.0-0 Nc3 (15...Bg4 16.Rc2+=) 16.Bc3 Qe7 17.Bb2 Nc4 Will a3 fall? (17...Bg4 18.Rfe1–/+) 18.Bc4+= dc4 19.Rc4 Bd3 20.Rc8 Rc8 21.Rc1 Rc1 22.Bc1 Bb5 23.Qb2 Qc7–/+ 24.Nd2 Ba6 25.g3 Qa5 26.Qc2+= h6 27.Kg2 Qd5 28.f3 Qb5 29.Qc8 Kh7 30.Qc2+= g6 31.Kh3 h5 32.e4 Be7 33.Qc7?? (better is 33.g4+=) 33…Qf1!? (33...Qf1 34.Nf1 Bf1#) 0–1. Jeschke,Holger – Nielsen,Gunnar, Schleswig Holstein–ch cand–A, 1997.

7.Nf3 g6 8.Be2 Bg7 9.0-0 0-0 10.a4 Nbd7 11.d4 Nb6 12.Nc3 Rc8 13.Qb3 Nc4 14.Bc4 Rc4 15.Ne5 Rb4 16.Qa3 Nd7 17.Nd5 Ne5 18.Nb4 ab4 19.Qb4 Nd3 20.Qb3 Nb2 21.Qb2 Qd7 22.Rfc1 Ra8 23.Qc3 Kf8 24.Qc7 Ke8 25.Qb6 Rc8 26.a5 Bd3 27.a6+– ba6 28.ba6 Ra8 29.a7 Be4 30.Qb8 Qd8 31.Qb5 Kf8 32.f3 Bd5 33.Rcb1 Rc8? 34.Qb8 e6? 35.Qc8!! Qc8 36.Rb8 Qe8 37.Re8 Ke8 38.a8Q Ba8 39.Ra8 Kd7 40.Ra7 Ke8 41.Kf2 e5 42.de5 Be5 43.f4 Bd6 44.Kf3 Bc5 45.Rb7 h5 46.e4 Be7 47.g4 hg4 48.Kg4 f6 49.h4 Kf7 50.f5 gf5 51.Kf5 Kf8 52.h5 Bd6 53.h6 Kg8 54.h7 Kh8 55.Kg6 f5 56.Rg7 fe4 57.Rg8# 1–0. Osmak,Iulija – Drogovoz,Irina, EYg10, Herceg Novi MNE, 2008.

7.f4 Nbd7 8.Nf3 h6 9.Nc3 e6 10.Rc1 Bc5 11.Be2 0-0 12.0-0 a4 13.Na4+/– Bd6 14.Nc3 Qb6 15.Nd4 Bh7 16.Ra1 Nc5 17.a4 Nd3 18.Bd3 Bd3= 19.Re1 Bf4 20.ef4?? Qd4–/+ 21.Kh1 Qf4–+ 22.Re3?? Bg6 23.Ne2 Qb4 24.Bf6=+ gf6 25.Rb3 Qd6 26.Rg3 Kh7 27.d4 Rg8 28.Qd2 Be4 29.Qf4? Qf4–+ 30.Nf4 Rg3 31.hg3 Rc8 32.a5–/+ 0–1. Meybohm,Dirk – Woldt, 1991.

7.Bf6 gf6 8.Nf3 Nd7 9.Nh4 Bg6 10.Nc3 e6 11.Ng6 (11.f4 f5 12.Nf3 Rc8=) 11...hg6 12.Rc1 Ba3 (12...Rc8 13.Be2=) 13.Rc2 Rc8 14.Na4 (14.Be2 Bb4=) 14...Nc5 (14...Rc2 15.Qc2 Bd6 16.h3=) 15.Nc5= Rc5 16.Rc5 Bc5 17.Be2 f5 18.0-0 (18.Qb3 b6=) 18...Bd6 Threatening mate: Bxh2 19.h3 (19.g3 Qg5 20.Qa4 Qh6=) 19...f6 (19...g5 20.Qa1 Rh7 21.Qb1=) 20.d4 Rh7 (20...g5 21.Re1=) 21.Qb1 (21.Qa4 Qb6=) 21...Qb6 22.Rc1 ½–½. Rosner,Dirk – Kruimer, CiF, 2000.

4.Bb2 Qb6

5.Nc3 cb5 6.Nb5 d5 (6...d6 7.Bf6 ef6 8.e3 Be7 9.d4 Qc6 10.Nf3+=) 7.e3 (7.Rb1 Nbd7 8.Qa4 Kd8 9.Nf3 Ng4 10.e3+/–) 7...Bd7 (7...Bg4 8.Qa4 Bd7 9.Bd4 Bb5 10.cb5+=) 8.Bd4 (8.Rc1 Na6 9.Bd4 Qd8 10.Bf6+/–) 8...Qd8 9.Bf6 (9.Rc1 Bb5 10.cb5+=) 9...ef6 (9...Bb5 10.Be7+=) 10.cd5 Na6 11.Qf3 Bc5 12.Qe4 Qe7 13.Qe7 Ke7 14.a3 Rhc8 (14...Bb5 15.Bb5 Nc7 16.Bc4+=) 15.d4+/– Bd6 16.Nd6 Kd6 17.Bd3 Kd5 18.Rb1 (18.Ne2 Kd6+/–) 18...Bc6 (18...Rc3 19.e4 Kd6= (19...Kd4? 20.Ba6 ba6 21.Ne2 Kc4 22.Nc3 Kc3 23.Ke2+–)) 19.Nf3+/– (19.Bh7?! g6 20.Ne2 Rh8 21.Nf4 Kd6+=) 19...Kd6 20.Nd2 (worse is 20.Bh7 g6+=) 20...Ke7 21.Nc4 Rg8 (better is 21...Rc7!?+–) 22.Na5 (22.Bh7?! Rh8 23.Bd3 Bg2+–) 1–0. Buss,Michael – Bedbur,Heinz, corr ICCF TT/40–13, 1992.

5.Nc3 d5 6.cd5 cd5 7.Rc1 (7.Nf3 Nbd7 8.d4 Qd6 9.e3 Nb6 10.Rc1=; 7.Qb3 e6 8.Nf3 Bd6 9.e3 0-0 10.Rc1=; 7.e3 Nbd7 8.d4 Qd6 9.Nf3 Nb6 10.Bd3=) 7...Nbd7 8.Nf3 e6 9.d4 Ne4 10.e3 +=.

5.e3 d5 6.Nc3 (6.Nf3 Bg4=) 6...Bf5 (6...e5 7.d4 ed4 8.ed4 cb5 9.Qe2 (worse is 9.Nd5 Nd5 10.cd5 Bb4 11.Ke2 0-0–/+) 9...Be7 10.c5=) 7.Na4 (7.Nf3 e6+=) 7...Qd8= 8.Qb3 (8.Bf6 ef6 9.c5 d4=) 8...Nbd7 9.Nf3 Bg6 (9...Rc8 10.Nh4 Bg4 11.h3=) 10.a3 (10.cd5 Nd5 11.Rc1 Rc8+=) 10...e6= 11.d4 dc4 (11...Be7 12.Be2=) 12.Bc4 Be7 13.0-0 Nd5 (13...0-0 14.Nc3=) 14.Ne5 (14.Rae1 0-0+=) 14...Ne5= 15.de5 0-0 16.Rad1 Qc7 (16...Qe8 17.b6+=) 17.Rc1 (17.b6 Qb8+=) 17...Rfd8 (17...Rac8 18.b6 Qb8 19.Rce1+=) 18.Bd5 (18.b6 Qb8 19.Rfe1+=) 18...ed5 (18...Rd5 19.Bd4 Qb8 20.bc6 bc6 21.Qc3=) 19.bc6 (better is 19.Bd4!?+/–) 19...bc6= 20.Bd4 Rdb8 21.Qc3 Ra6 22.Nc5 Bc5 23.Bc5 Qd7 24.Rfd1 Qg4 25.Bd6 Rd8 26.Bc7 Re8 27.Rd4= Qg5 28.Ba5 Qe5 29.Bb4= Qg5 30.Qe1 Be4 31.Qf1 Rea8 32.h4 Qh4–/+ 33.Rc5 Qf6 34.f3 Bf5 35.Qc1 Qg6 36.Kf2 h5 37.Qh1–/+ Qh6 38.Rc3 Rb8 39.Rh4 Bg6 40.Bc5?? Ra5 41.Rb4 Rb4 42.ab4?? Ra8 43.Qh4–/+ Bf5 44.Rc1 Ra2–+ 45.Kg1 Qg6 46.g3 Be6 47.Bd4 f6 48.e4 de4 49.fe4 Bg4 50.Re1 Qf7 51.Bf2 Qb3 52.e5 g5 53.Qh1–/+ Qc2 54.Qh2 fe5–+ 55.Re5 Be2?? 56.Rg5 Kf7+= 57.Be1 ½–½. De Visser,Arno – Cliteur, Hoogoven, 1996.

4.Bb2 d5

5.a4 dc4 6.e3 cb5 7.ab5 Qc7 (7...Bf5 8.Na3=) 8.Qc2 (8.Na3!?+=) 8...Be6= 9.Na3 c4 becomes the focus of attention 9...Nbd7 10.Nc4 Rc8 11.d3 (11.Qd1 g6=) 11...Nb6 (better 11...Bc4 12.dc4 e5=+) 12.Ra5?? (better 12.Nf3=) 12...Nc4–+ (12...Bc4?! 13.dc4 e6 14.Ra7 Bb4 15.Bc3=) 13.b6 (13.Ra1 Nb2 14.Qb2–+) 13...Qb6 14.Qa4 (14.dc4 Qa5 15.Bc3–+) 14...Bd7 15.Ra8 (15.Ra8 Ba4 16.Rc8 Kd7 17.Rc4 Qb2 18.Rd4 Kc7 19.Rc4 Bc6 20.f3–+). GuestRCFM – GuestPSHT, freechess.org, 2017.

5.bc6 Nc6=+ 6.cd5 Nd5 7.Nf3 Bf5 8.d3 Bg4 9.Nbd2 e6 10.a3 f6 11.d4 f5 12.e3 Bd6 13.Bc4 0-0 14.h3 Bh5 15.0-0 Qe7 16.Qb3 a4 17.Qa2 Bf7 18.Rfc1 Rfd8 19.Bb5 Be8 20.Bd3 Bg6 21.Rab1 Na5 22.Rc2 Rac8 23.Rbc1 Rc2 24.Rc2 Kh8 25.Rc1 Bh5 26.Bb5 Be8 27.Be8 Qe8 28.Nc4 Nb3 29.Rc2 Be7 30.Nce5 Kg8 ½–½. Hebels,Alex (1970) – Newton,Hobart (1985), IECG, 1999.

5.cd5 cd5 6.Nf3 e6 =.

5.cd5 cd5 6.Nf3 Bf5 7.e3 Nbd7 8.Nc3 e6 9.Be2 Bd6 10.0-0 h5 11.Nh4 (11.Rc1+=) 11...Bg6 (11...Bh7 A) 12.Bh5? Bd3–+ (12...Nh5 13.Qh5 g6 14.Qg4+=); B) 12.d3=) 12.f4 (12.Ng6 fg6 13.Qc2+/–) 12...Bf5? (better is 12...Bh7!?+=) 13.Nf5+– ef5 14.Qc2 d4 15.ed4 Rc8 (15...g6!?+/–) 16.Qf5+– Rh6 (16...g6 17.Qh3+–) 17.Ne4 (17.Bf3 Qc7 18.Nd5 Qb8+–) 17...Ne4 18.Qe4 Re6 19.Qd3 Qh4 20.g3 Qf6? (20...Qh3 21.Bf3+–) 21.Bh5 g6 22.d5 Qb2 23.de6 Bc5 24.Kh1 Nf6 25.ef7 Kf8 26.Qg6 Rc7 27.Rae1 Qd2 28.Qh6# 1–0. Fournier,Frederic (1860) – Radina,Franck (1630), Ch Oise, 2004.

5.e3 dc4 6.Bc4 cb5 7.Bb5 Bd7 8.a4 Nc6 9.Nf3 e6 10.0-0 Bd6 11.Na3 0-0 12.Nc4 Bc7 13.Rc1 Nb4 14.Bf6 gf6 15.Nd4 f5 16.f4 Rc8 17.Qh5 Nd5 18.Rf3 Nf6 19.Qh4 Bb5 20.Nb5 Kh8? (better is 20...Ne4 21.Qh6 f6+/–) 21.Nb6!! Ne4 (21...Bb6 22.Rc8 Combination) 22.Qd8 Rcd8 (22...Rfd8?? 23.Nc8 (23.Rc7?! Rc7 24.Nc7 Rd6+–; 23.Nc7?! Nd2 24.Nc8 Nf3 25.gf3 Rc8+–) 23...Bb8 24.d4+–) 23.Rc7 (worse is 23.Nc7 Rd2 24.Nb5 Rfd8+–) 23...Nd2 24.Rh3 Ne4 25.Nd4 Rd6 26.Nd7 Rg8 (26...Rd8 27.Ne5 Kg8+–) 27.Ne5 Rg7 (27...Rf8 28.Ng6 Kg8 29.Nf8 Kf8 30.Rh7 Kg8 31.Rhf7 Nc5+–) 28.Rc8 Rg8 29.Nf7 Kg7 30.Nd6 Rc8 31.Ne6 (31.Ne6 Kg6 32.Nc8+–) 1–0. Janek – Terry, internet, 2016.

5.e3 dc4 6.Bc4 cb5 7.Bb5 Bd7 8.Nc3 Nc6 9.a4 (9.Nf3 e6=) 9...e6 10.Nf3 Be7 11.0-0 0-0 12.h3 (12.Qe2 Rc8=) 12...Nb4 13.Bd7 Nd7 14.Nb5 Bf6 (14...Rc8 15.d4=) 15.Bf6 Nf6 (worse 15...gf6 16.d4+–) 16.d4 Rc8 17.Ne5 Qd5 18.Ng4 (18.Rc1 Rc1 19.Qc1 Ne4+=) 18...Ne4= 19.f3 Nc3 20.Nc3 Rc3 21.Ne5 (21.Qd2 Rc2 22.Qe1 Rfc8=+) 21...f6 22.e4 Qd6 23.Ng4 Rfc8 (23...Rd8–/+) 24.Rf2 (better 24.e5 fe5 25.Ne5–/+) 24...e5?? (24...h5 25.Nh2 Nd3 26.Rd2 Qd4 27.Kh1 Nf2 28.Rf2 Qf2 29.e5–+) 25.d5? (better 25.de5 Qd1 26.Rd1=) 25...h5 26.Nh2 Qc5 27.Kf1? (27.Qf1 Nd3 28.Rd1–+) 27...Qe3 (better 27...Nc2 28.Rc2 Rc2–+) 28.Qd2 (28.Re2 Qf4 29.g3 Qg3 30.d6–+) 28...Qd3 (28...Rc1 29.Qd1 Ra1 30.Kg1 Rc2 31.d6 Qf2 32.Kh1 Qg2) 29.Qd3= Rd3 30.Kg1 Kf7 31.Nf1 Ke7 32.Ng3 (32.Rd2 Rdc3=) 32...g6=+ 33.Rb2 Kd6 34.Nf1 Rcc3 (34...Rdc3 35.Nd2=+) 35.Nd2= Rc2 (35...h4 36.Rab1=+) 36.Rc2 Nc2 37.Nc4 Kc5 38.Nb2?? (better 38.Rc1 Kc4 39.Rc2 Kb3 40.Rc7+=) 38...Nd4?? (better 38...Rd5 39.Rb1 Rd2–+) 39.Nd3+– Kc4 (39...Kb6 40.Rb1 Kc7 41.Kf1+–) 40.Nf2 (40.Rd1 Kb3+–) 40...Ne2 (40...Kc5 41.Rb1 b6 42.Nd3 Kc4 43.d6+–) 41.Kf1 Nf4 (41...Ng3 42.Ke1 Kc5 43.Rb1+–) 42.g3 (better 42.Rc1 Kd4+–) 42...Nd5 43.ed5 Kc5 (43...Kd5 44.Rb1 Kc6 45.Ne4+–) 44.d6! Kd6 45.Ne4 Ke6 0–1. Abdullaevich (1825) – Mr_Poleanu (1795), lichess.org, 2020.

5.e3 dc4 6.Bc4 cb5 7.Bb5 Bd7 8.Nc3 g6+=.

5.e3 dc4 6.Bc4 cb5 7.Bb5 Bd7 8.Bc4 b5= 9.Qf3?? (better 9.Be2!?=) 9...Na6 (better 9...bc4 10.Na3 Nc6–+) 10.Be2 Nb4 11.Na3 Rb8 (better 11...Rc8=+) 12.Nh3? (better 12.Qf4 g6 13.Nf3=) 12...Bc6–+ 13.Qg3 (13.Qf5 g6 14.Qg5 Ne4–+) 13...Ne4 14.Qe5 Qd2 (14...f6 15.Qd4 Qc8 16.Bc1–+) 15.Kf1 Qd6 (15...Rb7 16.Nf4 Qd6 17.Qd6 Nd6 18.Rc1–/+) 16.Rd1 (16.Nf4 Rb7 17.Qd6 Nd6–/+) 16...Qe5–+ 17.Be5 Rb7 18.f3 f6 19.Bb2 (19.Ba1 Nc5 20.Rd2 e5–+) 19...Nd6 20.Kf2 e5 21.Rd2 (21.Bc3 Na2 22.Ba5 Ra7–+) 21...Nf5 (better 21...Na2!? 22.Ra1 Nb4–+) 22.g4–/+ Ne3! 23.Rc1 (23.Ke3 Bc5 Decoy) 23...Ned5 (better 23...Nc4 24.Nc4 bc4 25.Bc4 Rd7 26.Rd7 Kd7–/+) 24.Kg1?? (24.Rc6 Nc6 25.Rd5 Ba3 26.Ba3 b4=) 24...Be7?? (better 24...Bd7 25.f4 Na2 (25...ef4?! 26.Bf3–/+) 26.Rd5 Nc1 27.Bc1 Rc7–+) 25.Rc6=+ Nc6 26.Rd5 b4 (26...Ba3 27.Ba3 b4 28.Bc1=+) 27.Bb5 Rc7 28.Nc4 0-0 29.Ne3 (29.Ba4 Ra8=) 29...b3 (29...Rd8!?=) 30.ab3 Nb4 31.Rd2 Bc5 32.Bc4 Kh8 33.Kf2 a4 34.Ke2 ab3 35.Bb3 Rb8 36.Nf2 Nc6 37.Be6 (37.Bd5 Rd7 38.Nd3 Nd4 39.Bd4 Bd4+=) 37...Nd4 (better 37...Rb2!? 38.Rb2 Nd4 39.Kf1 Ne6–/+) 38.Bd4+= ed4 39.Nd5 Ra7 (39...Rc6!? 40.Bf5 g6+=) 40.Ne4+– Bf8 41.Rd4 Ra2 42.Rd2 (42.Nd2!?+–) 42...Rd2+= 43.Nd2?? (better 43.Kd2 Rb2 44.Kc3 Rh2 45.Kc4+=) 43...Re8–+ 44.Nc7 Re7 45.f4 Rc7 46.Kd3? (better 46.h4–+) 46...Bd6 47.Ke4 Rc2 48.Nf3 (48.Nc4 Bb8 49.Kf3 Rh2–+) 48...Re2 49.Kf5 (49.Kd5 Bf4 50.h4 g6–+) 49...g6 (better 49...Be7 50.Bf7 g6 51.Bg6 Rf2–+ (worse 51...hg6 52.Kg6 Rf2 53.Nh4–+)) 50.Kf6 Bf4 51.h3 Re3 52.Bd5 Rd3 53.Be4 Rd6 54.Kf7 Ra6 55.Bd5 h6?? (better 55...Ra1–+) 56.Nh4=+ Kh7 57.Be4?? g6 draws heavy fire (57.Ng6!? Ra7 58.Kf6 Bg5 59.Kf5=+) 57...Bg5–/+ 58.Bg6?? (58.Ng6 Rf6 59.Ke8–+) 58...Kh8–+ 59.Nf5 (59.Bd3 Rf6 (59...Bh4?! 60.Ba6 Bd8 61.Bb5=) 60.Ke8 Bh4–+) 59...Rf6 60.Ke8 Rg6 61.h4 (61.Kd7 Kh7–+) 61…Bc1 0–1. combijack (1850) – el_torro (1910), gameknot.com, 2018.

5.e3 Bf5 6.Nf3 e6 7.Be2 Be7 8.0-0 0-0 9.Qb3 (9.Nh4 Bb1 10.Rb1 dc4 11.Bc4 Ne8=) 9...a4+= 10.Qd1 a3 11.Bc1 (11.Bf6 Bf6 (worse is 11...gf6 12.cd5 cd5 13.Nc3+=) 12.d4 dc4 13.Bc4 c5+=) 11...dc4–/+ 12.Bc4 Bd3 13.Bd3 Qd3 14.bc6 Nc6 15.Nc3 Rfd8 16.Ne1?? (better is 16.Qb3 Rd7 17.Rb1–/+) 16...Qc3!!–+ 17.dc3 (17.Rb1 Qc4 18.Qc2 b5–+) 17...Rd1 18.Rb1 Na5 19.Nc2 Rf1 20.Kf1 Nd5 21.Bd2 Nc4 22.Be1 Nb2 23.Nd4 Rc8 24.c4 Rc4 25.Nb5 Nd3 26.Nd4 Ne1 27.Ke1 Nb4 28.Rb3 Nc2 29.Kd2 Nd4 30.ed4 Rd4 31.Ke3 Rd7 32.Rb5 g6 33.Ra5 Kg7 34.Ke4 Rd2 35.Ke3 Ra2 36.f4 b6 37.Ra7 Bc5 38.Kf3 Rb2 39.h3 a2 40.g4 Rf2 41.Kg3 Rc2 42.f5 gf5 43.gf5 ef5 44.h4 Bd4 45.h5 a1Q 46.h6 Kh6 47.Ra1 Ba1 48.Kf4 Rf2 49.Ke3 Rf1 50.Ke2 Rh1 51.Kf2 Bd4 52.Kg2 Rg1 53.Kf3 b5 54.Ke2 b4 55.Kd3 Bf6 56.Kc4 Rg4 57.Kb3 f4 58.Kc2 f3 59.Kd2 b3 60.Ke1 b2 61.Kf2 b1Q 62.Kf3 Qd1 63.Kf2 Bd4 0–1. orangutanb4 (1985) – dynamitedan (2085), kurnik, 2011.

5.e3 Bf5 6.Nf3 e6 7.Be2 h6 8.a3 Be7 9.d4 0-0 10.Nbd2 Ne4 11.0-0 Nd7 12.Ne4 Be4 13.Bd3 f5 14.bc6 bc6= 15.Qc2 Bf3 16.gf3 Bd6 17.f4 Qh4 18.f3 Rac8 19.Qg2 a4 20.Kh1 Rb8= 21.Rg1 Qe7 22.c5+= Bc7 23.Rae1 Rb3= 24.Bb1 Rfb8=+ 25.Re2 Qf7 26.e4 Bf4 27.ed5 cd5–/+ 28.Ba2 R3b5 29.c6 Nf8 30.Bb1 R5b6–+ 31.Rc2 Rc8 (31...Qc7 32.Qf2–+) 0–1. Nebe,Lutz – Bohn,Ulrich, Koblenz–ch, 1995.

5.e3 Bf5 6.Nf3 g6 7.d4 (7.cd5 cd5 8.Bf6 ef6+=) 7...Bg7= 8.Bd3 Bd3 9.Qd3 dc4 10.Qc4 a4 (10...Qd5 11.Qd5 Nd5 12.Na3=) 11.a3 Nd5 12.Nc3 Nc3 13.Bc3 Qd5 14.Qd5 cd5 15.Bb4 Nd7 16.Rc1 Kd8 (16...e5 17.de5 Ne5 18.Ne5 Be5 19.f4+/–) 17.Ke2 (17.Ng5 Rf8 18.Nh7 Rh8+–) 17...e5? (better is 17...Bf6+=) 18.de5+– b6 (18...Ne5 19.Rhd1 Nf3 20.Rd5 Ke8 21.Kf3+–) 19.Rhd1 Rc8 20.Rc8 (20.e6 fe6 21.Ng5 Rc1 22.Ne6 Ke8 23.Ng7 Kf7 24.Rc1 Nc5+–) 20...Kc8 21.Rd5 Re8 22.Bd6 Kb7 23.Kd3 h6 24.h4 Re6 25.Nd4 Ne5 26.Be5 Re5 27.Rd7 (27.Rd7 Kc8 28.Rf7+–) 1–0. Fournier,Frederic – Ruiz_Vidal,Pierre, Train France (FRA), 1999.

5.e3 Bg4 6.Be2 Be2 7.Ne2 (7.Qe2!? dc4 8.Bf6 gf6 9.Qc4=) 7...dc4–/+ 8.bc6 Nc6 9.Qa4 e6 10.Nd4 Qd7 11.Qc4 Nd4 12.Qd4 b5 13.Qd7 Kd7 14.Nc3 Rb8 15.f4 Bd6 16.Ne2 Rhc8 17.Rc1 a4 18.0-0 b4 19.d3 Bc5 20.Bd4 Bd4 21.Nd4 Nd5 (better is 21...Rc1 22.Rc1 b3 23.ab3 ab3–/+) 22.Rce1? (better is 22.Rc8 Rc8 23.e4–/+) 22...b3–+ 23.e4 Nc3 24.ab3 ab3 25.e5? (better is 25.Nf3–+) 25...b2 26.f5 b1Q 27.fe6 fe6 28.Rf7 Ke8 29.Ref1 Qf1! 30.Rf1 Rb1 31.Ne6 Ke7 32.Rb1 Nb1 33.Ng7 Nc3 34.Kf2 Kf7 35.Nh5 Ke6 36.d4 Rf8 37.Ke3–/+ Nd1 38.Ke4 Nf2 39.Ke3 Ng4 40.Ke4 Rf1 41.Nf4 Kd7 42.h3 Nf2 43.Kf5 Nd3 44.g3 Nf4 45.gf4 Kc6 46.Ke6 Rf4 47.d5 Kc7 48.Ke7 Rd4 49.d6 Kc6 50.e6 Rd6 51.Kf7 Rd1 52.e7 Rf1 53.Ke8 Kc7 54.h4 Re1 55.h5 Kd6 56.Kf7 Re7 57.Kf6 0–1. Reeves,A – Torman,Eric (2335), Detroit Clippert op, 1994. (known even as: Reeves,A – Tsemekhman,Vadim (2335), Detroit Clippert op, 1994)

5.e3 Bg4 6.Nf3 Nbd7 7.bc6 bc6 8.d4 e6 9.Nbd2 Rb8 10.Rb1? (better is 10.Bc3 Ne4 11.Ne4 de4 12.h3=) 10...Bf5–+ 11.c5 Qc7 (11...Qc7 12.Bc3 Bb1 13.Nb1 e5–+) 0–1. Echtwelzo – Goofy, playchess.de, 2003.

5.e3 Bg4 6.Nf3 e6 7.a4 Nbd7 8.Be2 Bb4 9.0-0 0-0 10.d4 Re8 11.Nc3 Qe7 12.Rc1 dc4 13.Bc4 Nd5 14.Be2 N7b6 (14...Bc3 15.Bc3 cb5 16.Bb5=) 15.Ne4 (15.bc6 bc6 16.Ne4 Rec8=) 15...Rac8 (15...Bf3 16.Bf3 cb5 17.ab5=) 16.Nc5 (16.bc6!? f5 17.Ng3=) 16...cb5=+ 17.Bb5 Red8 18.h3 Bh5 19.Be2? (better 19.Nd3!?=+) 19...Bc5–+ 20.dc5 Rc5 (20...Ne3 21.Qe1 Bf3 22.fe3 Be2 23.Qe2 Na4 24.Bg7 Kg7 25.Qg4 Kh8 26.Qa4 Rc5 27.Qa3–/+) 21.Qd4 (better 21.Rc5 Qc5 22.e4–/+) 21...Nf6?? (better 21...Nc3! 22.Bc3 Rd4 23.Bd4 Na4 24.Bc5 Nc5–+) 22.Qc5+– (22.Rc5 Rd4 23.Bd4 Nbd7 24.Ra5 Bf3 25.Ra8 Ne8 26.Bf3 e5+–) 22...Qc5 (22...Nfd5 23.Qa5 f6 24.e4+–) 23.Rc5 Bg6 (23...Bf3 24.Bf3 Na4 25.Bf6 gf6 26.Ra5+–) 24.Be5 (24.Ra5 Be4+–) 24...Nfd7 (24...Ra8 25.Rfc1 Nfd5 26.Bb5+–) 25.Ra5 Nd5 26.Bd4 b6 27.Ra7 N7f6 (27...Be4 28.Bb5 Bf3 29.Bd7+–) 28.Bb5 (better 28.Rc1 Kf8+–) 28...Nb4 (28...Ne4 29.Rc1+–) 29.Ne5 Nfd5 30.Nc6 (30.Rd1 Rc8 31.Nc4 Bc2+–) 30...Rc8 (30...Nc6 31.Bc6 h5 32.Bd5 Rd5 33.Bb6+–) 31.Nb4 Nb4 32.Bb6 Nd5 33.Bd4 (33.Bd4 h5 34.a5+–) 1–0. BeepBeepImAJeep (2685) – patryk2001 (2555), lichess.org, 2019.

5.e3 Bg4 6.Nf3 e6 7.a4 Nbd7 8.Be2 Bb4 9.0-0 0-0 10.d4 h6 (10...dc4 11.bc6 bc6 12.Nfd2 Be2 13.Qe2=) 11.Nbd2 c5 12.cd5 ed5 Black gets in control 13.dc5 Nc5 14.Nd4 Nd3 15.Ba3 (worse 15.Bg4 Nb2 16.Qc2 Na4 17.Ra4 Ng4=+) 15...Ba3 16.Ra3 Ne5 17.Bg4 Neg4 18.h3?? (better 18.N2f3+=) 18...Qd6–/+ Do you see the mate threat? 19.N2f3 (19.hg4!? Qa3 20.Nb1–+) 19...Qa3–+ 20.hg4 Ng4 21.Nf5 g6 22.Ng3 Qd6 23.Ne2 h5 24.Qd4 Rac8 25.Rd1 (25.Qd2–+) 25...Rc4?? (better 25...Rc2 26.Kf1 Rfc8–+) 26.Qc4!!+– Rc8 (26...dc4 A pinning theme 27.Rd6) 27.Qc8 Kg7 28.Qc3 (28.Qb7 Ne5 29.Ne5 Qe5+–) 28...Kh7 (28...Nf6 29.Nf4 Qb4 30.Qc7+–) 29.Nf4 Nf6 30.Qd4 (30.Ng5 Kg8 31.Qc8 Kg7 32.Qb7 Qd7 33.Qd7 Nd7 34.Nd5 Ne5+–) 30...Qe7 31.Nd5 Nd5 32.Qd5 Qb4 33.Qd4 (33.Qf7 Kh6 34.Rd7 Qb1 35.Kh2 Qh1 36.Kh1 g5 37.Qe6) 33...Qb3 34.Ng5 Kh6 35.Nf7! Kh7 (35...Qf7 36.Qh8) 36.Ng5 (36.Qh8) 36...Kh6 37.f4 (37.Qh8 Kg5 38.f4 Kg4 39.Qc8 Qe6 40.Qe6 Kh4 41.Qh3) 37...h4 (37...Qg8 38.Qf6 Qg7 39.Rd7 h4 40.Rg7 Kh5 41.Qg6 Kg4 42.Ne6) 38.Qh8 1–0. BeepBeepImAJeep (2585) – anarbinev (2095), lichess.org, 2018.

5.e3 cb5

6.cb5 d5 7.Qc2 Nbd7 8.a4 b6 9.Nf3 Bb7 10.d3 (10.Nc3!?=) 10...Rc8–/+ 11.Qd2 (11.Qd1!?–/+) 11...Bb4–+ 12.Bc3 Nc5 (12...0-0 13.Bb4 ab4 14.Be2–/+) 13.Qb2–/+ Bc3 (13...0-0 14.Be2 d4 15.Bb4 ab4 16.ed4 Bf3 17.gf3–/+) 14.Nc3 0-0 15.d4 Nce4 16.Ne4 Ne4 (16...de4!? 17.Nd2 Nd5–/+) 17.Bd3+= Nd6 (17...Qd6 18.0-0+=) 18.0-0= Nc4 19.Bc4 (better is 19.Qb3!?=) 19...dc4–/+ (19...Rc4?! 20.Ne5 Rc7 21.Rac1=) 20.Qe2 Qd5 (better is 20...c3!?–/+) 21.Rfc1= c3 (better is 21...Rc7 22.Rc3 f6=) 22.Rc2 (better is 22.Ra3+=) 22...Qb3–/+ 23.Ne5 Be4 24.Rcc1 Qb2 (24...Rfd8 25.Qg4 Bb7 26.Nc6 Bc6 27.bc6 Rc6 28.Qe4–+) 25.Qg4+= f5 26.Qd1 (26.Qh4 Rc7–/+) 26...c2 27.Qd2 Qb4 (27...Rc3 28.f3 Rfc8 29.fe4 Qa1 30.Ra1 c1R 31.Rc1 Rc1 32.Kf2–+) 28.Qe2 Qc3 29.Ra2 (29.Qe1!?–/+) 29...Qb3 30.Raa1 Qb2 31.f3 (31.Qd2!?=) 31...Bd5 (31...Qa1! 32.Ra1 c1Q 33.Rc1 Rc1 34.Kf2 Rc2 35.fe4 fe4 (35...Re2?! 36.Ke2 fe4 37.Nd7–/+) 36.Ke1 Re2 37.Ke2 Rc8–+) 32.Nd7+= Bb3 33.Nf8 (33.Nb6? Qa1 34.Ra1 c1Q 35.Rc1 Rc1 36.Kf2 Rc2 37.Qc2 Bc2–+) 33...Kf8 34.Qd2 Rc4 35.d5 Qe5 (35...ed5 36.Qd5 Ra4 37.Qd8 Kf7 38.Qc7 Kf6 39.Qd8 Kg6 40.Qb6 Kh5 41.g4 fg4 42.Qc5 Kg6 43.Qb6 Kg5 44.f4 Kh4=) 36.Qd3?? (better is 36.Ra3 Qc3 37.Qc3 Rc3 38.de6+=) 36...Rc3–+ 37.Qd4 Qd4 38.ed4 ed5 39.Kf2 (39.Ra3!? Rd3 40.Kf2–/+) 39...Rc4–+ 40.Ke3 Ba4 41.Kd3 (41.Ra3 Ke7–+) 41...Bb5 42.Rc2?? (42.f4–+) 42...Ra4 (42...Ra4 43.Kc3 Ra1–+) 0–1. Nikolic,Jovane – Li,Victor Hwa Chin (2020), ATC IVIRT, 2009.

6.cb5 Nbd7 7.Nf3 e6 8.a4 Bd6 9.Be2 0-0 10.0-0 b6 11.d3 Bb7 12.Nbd2 Qe7 13.Nd4 Rac8 14.h3 g6 15.N4b3 Kg7 16.e4 Kg8 17.ed5= Nd5 18.Bf3 Ne5=+ 19.Be4 Nf4–/+ 20.Nc1 f5–+ 21.Bb7 Qb7 22.Nf3 Nf3 23.Qf3 Qf3 24.gf3 Nh3 25.Kg2 Nf4 26.Kg1 Rc2 27.Bd4 Rc1! 28.Rac1 Ne2 29.Kg2 Nd4 30.Rc4 Ne2 31.d4 Nf4 32.Kh1 Rd8 33.Rc6 Nd5 34.Re1 Kf7 0–1. StephenHilton – Garfield85 (1945), internet, 2006.

6.cb5 Bg4 7.Be2 Be2 8.Ne2 =.

6.cb5 Bf5

7.Nf3 Nbd7 8.a4 e6 9.Be2= Rc8 10.Nc3 h6 11.0-0 Bd6 12.h3 Qe7 13.d4 0-0 14.Bd3 Bd3=+ 15.Qd3 Nb6 16.Rfc1 Nc4 17.Qe2 Rc7–/+ 18.b6 Rc6 19.Ne5 Ne5 20.de5 Be5 21.Ba3 Bd6 22.Bd6 Qd6 23.Nb5 Rc1 24.Rc1 Qb6 25.Qc2 Ne4 26.Qc7 Qc7 27.Rc7 b6 28.Rb7 Rc8 29.Rb6 Rc1 30.Kh2 Nf2 31.Ra6 Rh1 32.Kg3 Ne4 33.Kf4 Rf1 34.Ke5 f6 (35.Ke6 Nc5 36.Kd5 Na6–+) 0–1. Genne,Rene – Almada,Enrique (2285), Zuerich op2, 1994.

7.Nf3 Nbd7 8.Be2 Rc8 9.d3 Qb6 10.Nc3 e6 (10...e5 11.Rc1=) 11.Rc1 Rc7 12.0-0 Bd6 13.e4 (13.Nd4 Bg6=) 13...de4 14.de4 Ne4 15.Ne4 Be4 16.Bg7 Rg8 17.Bd4 Rc1 (17...Bc5 18.Bc5 Nc5 19.Qd4+=) 18.Qc1 Qc7 (18...Rg2 19.Kg2 Qd4 20.Rd1 Qg7 21.Kf1=) 19.Qe3 (19.Qc7 Bc7 20.Rc1 Kd8=) 19...Bh2+= 20.Kh1 (20.Nh2 Rg2 Theme: Double Attack) 20...Qf4 (20...Bf3 21.Bf3 Bf4 22.Qe2=) 21.Rc1= Ke7 22.Bc5 (22.Nh2? Bg2 23.Kg1 Bd5 24.Ng4 Qe3 (24...Rg4?! 25.Bg4 Qg4 26.Kf1+=) 25.Be3 h5–+ (25...Ba2 26.Kh2+=)) 22...Nc5 23.Qc5 Kf6 24.Rc4 (24.Nh2?? Rg2 25.Qd4 e5–+) ½–½. Boehnke,Hartmut (1970) – Holl,Andreas (2045), 2006.

7.Nf3 Nbd7 8.Be2 e6 9.0-0 (9.Nh4 Bb1 10.Rb1 Rc8=) 9...Bd6 (9...Rc8 10.d3=) 10.Nd4 Bg6 11.f4 0-0 12.d3 (12.Nc3 Nb6=) 12...e5 (12...Qe7 13.Qd2=) 13.fe5 (13.f5 ed4 14.Bd4 Qc7+=) 13...Be5 14.Nd2 Re8 15.Rf2 Nc5 16.Nf1 Qd7 17.Rb1 Ne6 (17...Rac8 18.a3+=) 18.Ne6= Qe6 19.Bf3 (19.Be5 Qe5 20.Qa4 Qc3–/+) 19...Bb2 (19...Rac8 20.Be5 Qe5 21.Rc2+=) 20.Rbb2= Rac8 21.Rbc2 h6 22.a4 Qd6 23.Rc8 Rc8 24.Rc2 Re8 25.Rc1 Qa3 26.Be2 Re7 27.Rc8 Kh7 28.Qc2 b6 29.Rc6 Re6 30.Rc7 Qb4 ½–½. Pommerel,Wim – De Ruiter,T, The Netherlands, 1998.

7.Bf6 ef6 8.Nc3 Bb4 =.

7.Bf6 gf6 8.Nc3 e6 9.Nge2 Nd7 10.Nd4 Bg6 11.Be2 Ba3 12.Qb3 Qe7 13.0-0 Nb6 14.Nc2 Bd6 15.a4 (15.Nd4 a4 16.Qd1 Rg8=) 15...Rc8=+ 16.Rfc1 Kf8 17.h4 f5 (17...Rg8 18.h5 Bf5 19.d3=+) 18.g3 (18.h5 Nc4 19.hg6 hg6 20.Bc4 Qh4=) 18...Rg8 (better 18...f4 19.ef4 Rg8=+) 19.h5+– Bh5 20.Bh5 Qh4 21.Bf3 Bg3 22.Kf1 (22.fg3?? Qg3 23.Kf1 Qf3 24.Ke1 Rg1) 22...Bf2 23.Ke2 Bg1 24.Rg1 Qh2 25.Rg2 Rg2 26.Bg2 Qg2 27.Kd1 f4 28.ef4 Qf3 29.Kc1 (29.Ke1!?=) 29...Nc4 (29...Nc4 30.Na3 Na3 31.Qa3 Ke8–/+) 0–1. pierred (2800) – pcmvr, net–chess.com, 2016.

4.Bb2 d6

5.a4 e5 6.e3 Be7 7.Nc3 0-0 8.Nf3 Nbd7 9.Be2 Re8 10.d4 ed4 11.Nd4 Qc7 12.0-0 Nb6 13.Rc1 Be6 (13...c5 14.Nf3=) 14.Ne6 fe6 15.Qb3 c5 16.Rcd1 Rad8 17.Bf3 Bf8 (17...d5 18.cd5 c4 19.Qc2 ed5 20.Ne2+=) 18.Ne2+– Nfd7 19.Nf4 Ne5 20.Be5 de5 21.Nd3 (21.Rd8 Qd8 22.Rd1 Qc7+–) 21...Be7 22.Be4 Bf6 23.Qc2 g6 24.f3 Kg7 25.Nf2 Rd7 26.Rd7 Nd7 27.Rd1 Rd8 28.Rd3 Nb6 29.Rd8 Bd8 30.Kf1 Bf6 31.Ke2 Qd7 32.Bd3 h5? (32...Be7 33.Ng4+=) 33.Ne4 (33.Bg6 Kh6 34.Bd3 Kg7+–) 33...Be7 (33...Qc7!?+–) 34.Qc3+– Qc7 35.Qa5 Bd8 (35...h4 36.Kf1+–) 36.Qa7 Nc8 (36...Be7 37.a5 Nc8 38.Qa8+–) 37.Qc5 Qc5 (37...Qb8 38.f4 Be7 39.Qe5 Qe5 40.fe5 b6+–) 38.Nc5 Bb6 (38...Bf6 39.Nb7 e4 40.fe4+–) 39.Ne6 (better 39.Nb7 e4 40.Be4 Bc7+–) 39...Kf6 (39...Kf7 40.Ng5 Ke7 41.f4 (worse 41.Bg6 Kf6+–) 41...ef4 42.ef4+–) 40.Nf8 Nd6 (40...Bc7+–) 41.Nd7 Ke7 42.Nb6 Nc8 (42...e4 43.fe4 h4+–) 43.Nc8 Kd7 44.Nb6 Kc7 45.Nd5 Kb8 46.Nc3 (46.Bg6 h4 47.f4 ef4 48.ef4 h3 49.gh3 Ka7 50.f5 Kb8 51.f6 b6 52.f7 Ka8 53.f8Q Kb7 54.Qd8 Ka7 55.Qb6 Ka8 56.Nc7) 46...g5 47.c5 g4 48.b6 e4 49.fg4 (better 49.Ne4 Ka8+–) 49...h4 50.Be4 h3 51.gh3 Ka8 (51...Kc8 52.h4 Kd7 53.Bb7 Ke7 54.Bd5 Kf8 55.b7 Ke8 56.b8Q Kd7 57.c6 Ke7 58.Qc7 Ke8 59.Qd7 Kf8 60.Qf7) 52.Bf5 Kb8 53.g5 Ka8 54.g6 Kb8 55.g7 Ka8 56.g8Q 1–0. BeepBeepImAJeep (2570) – Jessejames88 (2360), lichess.org, 2018.

5.d4 d5 6.e3 Be6 7.cd5 Bd5 8.Nc3 Qc7 9.Qd3 Nbd7 10.e4 Be6 11.Nf3 0-0-0? 12.bc6+– (12...bc6 13.Qa6 Qb7 14.Qa5+–) 1–0. Nemec,Zdenek (1885) – Valica,Slavo (1630), b2–b4.com, 2005.

4.Bb2 e6

5.a4 cb5 6.cb5 b6 7.e3 d5 8.Nf3 Be7 9.Be2 Bb7 10.0-0 Nbd7 11.d4 0-0 12.Nbd2 Rc8 13.Ne5 Ne5 14.de5 Nd7 15.Nf3 Nc5 16.Bd4 Ne4 17.Bd3 Bc5 18.Be4 (18.Rc1!?=) 18...de4=+ 19.Bc5 Rc5 (worse 19...bc5 20.Nd2=) 20.Nd4 (20.Qd8 Rd8 21.Rfd1 Rd3=+) 20...Re5 21.Rc1 Rd5 22.Qc2 Qg5 (better 22...Rc5!? 23.Qb1 Rh5=+) 23.Qc7+= Bc8 (23...e5 24.Ne2 Ba8 25.Qb6+=) 24.Qb6+– e5 25.Nc6?? (better 25.f4 ef3 26.Nf3+–) 25...Bh3–/+ Do you see the mate threat? 26.g3 Qf6 The mate threat is Qf3 27.Rfd1?? (better 27.f4 ef4 28.Qc7–/+) 27...Qf3 28.Ne7 Kh8 29.Nd5 (29.Ng6 fg6 30.Rd5 Qg2) 29…Qg2 0–1. BeepBeepImAJeep (2740) – ChessClock99 (2580), lichess.org, 2020.

5.a4 cb5 6.cb5 d5 7.e3 Bb4 8.Nf3 0-0 9.Be2 Nbd7 10.0-0 Re8 11.d4 b6 12.Nbd2 Bb7 13.Rc1 Rc8 14.Nb1 Qe7 15.Nc3 Nf8 16.Ne5 Ng6 (16...N8d7 17.Nc6 Bc6 18.bc6=+) 17.f4 (17.Ng6 fg6 18.Na2 Rc1 19.Nc1 Ne4=) 17...Ne5 18.fe5 Ne4 19.Ne4 de4 20.Bc4 Rc4?? (better 20...Bd5 21.Qe2 Qg5 22.Bd5 ed5=) 21.Rc4+– Bd5 22.Rc1 Qg5 23.Qe2 h5 24.Rc7 Rf8 25.Qf2 Qg6 26.Bc3 f5 (26...Bc3 27.Rc3 Qg5 28.Rfc1+–) 27.Bb4 ab4 28.Rb1 b3 29.a5 (29.Rbc1 Qg5+–) 29...f4? (better 29...ba5 30.Ra7 Rc8+–) 30.ab6 (30.ef4 e3 31.Rg7 Kg7–+) 30...fe3 31.Qe3 Rf3 32.Qe2?? (32.Qe1 e3 33.b7+–) 32...e3–+ The mate threat is Qxb1 33.b7?? (33.Rf1 Rf1 34.Qf1–+) 33...Qb1 34.Qe1 (34.Rc1 Qc1 35.Qe1 Qe1) 34…Qe1 0–1. BeepBeepImAJeep (2530) – Bad4life (2325), lichess.org, 2015.

5.a4 d5 6.e3 +=.

5.a4 g6 6.e3 (6.e4 d5 7.e5 Ne4+=) 6...Bg7 (6...b6 7.Nf3+=) 7.Nf3 0-0 8.d4 d5 9.c5 b6 10.cb6 Qb6 11.Qc2 (11.Ba3 Re8+=) 11...Bb7 12.Ba3 Re8 (12...Rc8 13.Qc5 Qc5 14.Bc5+=) 13.Nbd2 (13.Bc5 Qd8+=) 13...Nbd7= 14.Be2 (14.Rb1 Rac8 15.Bc5 Nc5 16.dc5 cb5 17.cb6 Rc2+=) 14...Rac8 (14...Rec8 15.bc6 Rc6 16.Qb3+=) 15.Bc5 Nc5 (15...cb5 16.Rc1 Qd8 17.Bb5 Nc5 18.dc5=) 16.dc5 Qd8 17.Rc1 (17.b6 Rb8+=) 17...Nd7 (better is 17...cb5 18.ab5 Nd7+=) 18.0-0 (better is 18.b6!?+=) 18...cb5–/+ 19.Bb5 Rc5 20.Qb1 (20.Qd3 Re7–/+) 20...Rc1 (20...Re7 21.Nb3 Rc1 22.Rc1–/+) 21.Rc1+= Re7 22.Nb3 Ne5 23.Nfd4 Rc7 24.Rc7 Qc7 25.Qe1 Exerts pressure on the isolated pawn 25...Nc4 26.Bc4 Qc4 27.Na5= Qa6 28.Nb7 Qb7 29.Nb5 Qa6+= 30.Qd1 Qa5 31.g3 Qb4 32.Qc2 Bf8 33.Na7 Bc5+= 34.Nc6 Qb6 35.Ne5 Qd6 36.Nd3 Bb6 37.Qc8 Kg7 38.Qc3 d4 39.Qb2 e5 40.ed4 Bd4+= 41.Qb5 Qf6 42.Qd5= Qf5 43.Qb5 Qe4 44.a5? f6?? 45.Qd7 Kh6 46.Qh3 Kg5 47.Qh4 Qh4+= 48.gh4 Kh4 49.a6 e4 50.Nb4+= f5 51.Nc6 Bb6 52.a7 Ba7 53.Na7 h5 54.Nc6 g5 55.Ne7 f4 56.Nf5 Kg4 57.Nd4 e3 58.Kg2+/– The mate threat is h3 58...h4? 59.h3+– Kh5 60.f3?? Kg6= 61.Kf1 Kf6 62.Ke2 Ke5= 63.Nc2 Kd5 64.Kd3 Kc5 (64...Kc5 65.Ke4 Kc4=; better is 64...Kd6!?=). Semenko,Georg (1800) – Rossmann,Erich, 7sen.BayEM Schney, 1995.

5.e3 b6 6.Nf3 d5 (6...cb5 7.cb5 d5 8.Nc3=) 7.d3 (better 7.Nc3!?+–) 7...Bb4 8.Bc3 (8.Nc3 cb5 9.cb5 Nbd7=) 8...Qe7 (8...0-0 9.Qa4 Qd6 10.Bb4 Qb4 11.Qb4 ab4 12.Nbd2–/+) 9.a3= Bc3 10.Nc3 cb5 11.Nb5 0-0 12.Be2 Rd8 13.Qc2 Bd7 14.0-0 Rc8 (14...dc4 15.Qc4 Rc8 16.Qb3=) 15.Qb3 (15.Nc3 b5+=) 15...dc4 16.dc4 Ne4 17.Ne5 (17.Nc3 Nc3 18.Qc3 Ba4=) 17...Nc5 (better 17...Nd2!? 18.Qb2 Nf1 19.Rf1 Bb5 20.cb5 Ra7–/+) 18.Qb2 Be8 19.Bf3 (19.Rfd1 Nc6 20.Nd6 Ne5 21.Nc8 Qf6 22.Nb6 Nf3 23.Bf3 Qb2 24.Na8 Nd3+=) 19...Ra6 (19...Nc6 20.Rad1 Na4 21.Qa1 Ne5 22.Qe5 (22.Ba8?? Nc4 23.Be4 Bb5–+) 22...Bb5 23.Qb5=+) 20.Rfd1+– Bb5 (20...f6 21.Nd3+=) 21.Qb5 (21.cb5 Ra7+–) 21...f6 (21...Qf6 22.Nc6+=) 22.Nc6 (22.Nd3!?+–) 22...Nc6+= 23.Bc6 Rb8 (23...Ra7!?+=) 24.Rd2+– Ra7 25.Rad1 h5 (25...Rc7 26.g3+–) 26.g3 Kh7 27.Bf3 Kh6 28.Qb2 (28.Rd6 g5+–) 28...g5 (28...Rd7 29.Rd4+=) 29.h3 Rc7 30.Qb5 (30.Rd6 Qg7+–) 30...e5 (30...Qe8!?+=) 31.Rd6+– e4 32.Be2 Nd3 33.Qf5?? (better 33.Qd5 Rc5 34.Qd4+–) 33...Qd6–+ 34.Bd3 (34.Qe4 Nc5 35.Qf3–+ (35.Rd6?? Ne4 36.Rd4 Nc5–+)) 34...ed3 35.Rd3 Qe7 (35...Qe5!? 36.Qe5 fe5 37.Rd5–+) 36.Rd4 Rc5 (better 36...Rd8 37.Re4 Rc5 38.Qg5 Kg5 39.Re7 Rc4 40.Kg2–+) 37.Qf3 (37.Qd3 b5 38.cb5 Rbb5–+ (38...Rcb5?! 39.Rd7 Rb1 40.Kh2=+)) 37...Rbc8 38.g4 (38.Qe2 Qe6 39.Qd3 Qh3–+) 38...h4 (38...Rc4 39.gh5 Rd4 40.ed4 Rc1 41.Kg2–+) 39.Rd5 (39.Qe2 Qf7–+) 39...Rc4 40.Rf5 (40.Kg2 R8c6–+) 40...Rc1 41.Kg2 R8c6 42.Qd5 (42.a4 Rd6 43.Rb5 Kg7–+) 42...R1c5 (better 42...Rd6 43.Qf3 Rdd1 44.Qa8–+) 43.Qd3 (43.Qf3 Qd6 44.Qe4 Rf5 45.gf5 Rc5–+) 43...Rf5 44.Qf5 (44.gf5 Qc7 45.e4–+) 44...Qa3 45.Qd7 Qc5 (better 45...Qd6!? 46.Qe8 Kg7 47.Qe4–+) 46.Qf7 (46.Qd8 Qc4 47.Qf8 Kg6 48.Qe8 Kg7 49.Qe7 Qf7–+) 46...Qd6 47.f4 Rc2 48.Kf3 Qc6 49.e4 (49.Qd5 Qd5 50.e4 Qd3) 49…Qc3 0–1. Antares_Sco (1750) – Amun (1815), lichess.org, 2018.

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

5.e3 g6 6.a4 b6 7.Nf3 Bg7 8.g3 (8.d4 0-0+=) 8...Bb7 9.Bg2 cb5 10.cb5 0-0 11.0-0 d6 12.d3 Nd5 (12...Nbd7 13.Nc3=) 13.Bg7+= Kg7 14.Nfd2 Qf6 15.d4 e5 16.Nc4 Nd7 17.de5 Ne5 18.Nb6?? (better is 18.Ne5 Qe5 19.Ra3+/–) 18...Nb6+= 19.Bb7 Rad8?? (better is 19...Rab8 20.Bg2 Nf3 21.Bf3 Qa1 22.Qd6 Rfd8+=) 20.Nd2 d5 21.Rc1 Nec4 22.Nc4 dc4 23.Qf3 Qe6 24.Qc6 Rd6 25.Qe4 Qe4 26.Be4 Rb8 27.Ra1 c3 28.Rfc1+– Rc8 29.Bc6 Rcc6 30.bc6 Rc6 31.Ra3 Rc4 32.Rcc3 Ra4 33.Ra4 Na4 34.Ra3 Nc5 35.Ra5 Ne6 36.f4 h5 37.Kf2 f6 38.Ra7 Kh6 39.Ra6 (39.Ra6 Nc5 40.Ra8+–) 1–0. Hal1958 – Handkaes, playchess.de, 2004.

5.Nf3 cb5 6.cb5 d5 7.e3 =.

5.Nf3 d5 =.

5.Nf3 Be7 6.e3 0-0 7.Be2 d5 8.0-0 dc4 9.Bc4 cb5 10.Bb5 Bd7 11.Bd7 (11.Qe2 Bb5 12.Qb5 Qd7 13.Qd7 Nbd7=) 11...Nbd7 12.a4 Nd5 13.d4 Rc8 14.Na3 N7b6 15.Qb3 Nb4 Black is in command 16.Rfc1 (16.e4 Qd7=) 16...Qd5+= 17.Qd5 N6d5 18.Nb5 (18.Ne5 Nb6 19.Nb5 Rc1 20.Bc1 Rc8+=) 18...Nd3 19.Rcb1 Rc2 20.Ba3 Ba3 21.Ra3 (21.Na3 Rc7=) 21...N3b4 22.Nd6 Nc3 23.Rf1 b6+= 24.Ne5 f6 25.Nf3 Rd8–+ 26.Nb5 Nb5 27.ab5 Rdc8 28.Raa1 Nd5 29.h3 h6 30.e4 Nc3–+ 31.d5 ed5 32.ed5 Nd5 33.Rfd1 R2c5 34.Nd4 Nc3 35.Re1 Nb5 36.Ne6 R5c6 37.Nf4 Rd6 38.Re7 Rc7 39.Re8 Kf7 40.Rae1 Rcd7 41.Kh2 Nc7 42.Rb8 b5 43.Rb7 b4 44.Nh5 Na6 45.Rb5 Rd5 46.Rd5 Rd5 47.g4 b3 48.Nf4 Rd6 49.Ra1 b2 50.Rb1 Rd2 51.Kg3 a4 52.Nd3 Rd3 (52...Rd3 53.Kg2 a3–+) 0–1. Schmidbauer,Jens – Oberberger,H, North Bayern–ch, 2004.

5.e3 cb5

6.cb5 b6 7.f4 Bb7 8.Nf3 d5 9.Be2 Nbd7 10.Nc3 Bd6 11.0-0 Rc8 12.Rc1 0-0 13.Nd4 Rc7 14.Na4 Rc1 15.Qc1 Qa8 16.Nc6 Rc8 17.Bf6 gf6 (17...Nf6?? 18.Nb6 Qb8 19.Nc8 Qc8 20.Na5+–; 17...Bc6 18.bc6 gf6 19.cd7+–) 18.Qb1 f5 19.d4 Rc7 20.Ne5 Qd8 21.Rf3 Ne5 22.fe5 Ba3 23.Rf1 f6 24.Qb3 (24.Nb6?! Rc3 25.Na4 Re3=) 24...Bf8 25.e4 fe5 26.ef5 (26.Nb6? ed4 27.Nd5 ed5 (27...Bd5?! 28.ed5 Rc3 29.Qa4+=) 28.ef5 Qg5–+) 26...ef5 27.Qg3 Bg7 28.de5 Rc2 29.Bd1 Ra2 30.e6 Kh8 31.Re1 Bf6 32.e7 Be7 33.Re6 Bf8 (33...f4 34.Qf4 Kg7=) 34.Qe5+= Kg8 35.Re8 Qg5 36.Rf8 Kf8 37.Qb8 Bc8 38.Qc8 ½–½. Nemec,Zdenek (1915) – Kroes,Friso (2045), RA–2010-0-00103, 2010.

6.cb5 d5 7.a4 Be7 8.Nf3 0-0 9.Be2 Nbd7 10.0-0 Ne4 11.d3 Nec5 12.d4 Ne4 13.Nbd2 Ndf6 14.Ne4 Ne4 15.Nd2 Nd2 16.Qd2 Bf6 17.Bd3 g6 18.Rac1 Re8 19.Qc2 e5 20.de5 Be5 21.Be5 Re5 22.Qc7 Qc7 23.Rc7 Kf8 24.Rfc1 Bf5 (24...Re8!?+–) 25.Bf5 Rf5 (25...gf5 26.Rb7 f4 27.Rcc7+–) 26.Rb7 Rd8 27.g4 Rf6 28.Rd1 h6 (28...Rc8 29.Ra7 Rc2 30.Rf1+– (30.Rd5?! Rff2 31.Ra8 Ke7=; 30.Ra5?! Rff2 31.Rd5 Rg2 32.Kh1 Rge2 33.Ra8 Kg7=)) 29.h3 Rfd6 Black prepares d4 (29...Rc8 30.Ra7 Rc2 31.Rf1+– (31.Ra5?! Rff2 32.Rd5 Rg2 33.Kf1 Rcf2 34.Ke1 Re2 35.Kf1 Ref2 36.Ke1 Re2 37.Kf1 Ref2=; 31.Rd5?! Rff2 32.Rdd7 Rg2 33.Kf1 Rgf2 34.Ke1 Rce2 35.Kd1 Ra2=)) 30.Rd4 (30.Ra7 d4 31.ed4 Rd4 32.Rd4 Rd4 33.Ra5 Rb4+–) 30...Kg7 (30...R6d7 31.Rd7 Rd7 32.e4+–) 31.Rf4 (31.Ra7 Rc8+–) 31...Rf6 (31...R6d7 32.Rd7 Rd7 33.Rd4+–) 32.Rf6 Kf6 33.Kf1 (33.Ra7 d4 34.ed4 Rd4 35.Ra5 Rb4+–) 33...d4 34.Ke2 de3 35.fe3 h5 (35...Rf8 36.Ra7+–) 36.gh5 gh5 37.Ra7 Rg8 38.Ra5 Rg3 (38...Rg2 39.Kd3 Rb2+–) 39.b6 Rg8 40.b7 Rb8 41.Rb5 Ke7 42.a5 Kd7 43.a6 Kc7 44.Kd3 (44.e4 f5 45.a7 Rb7 46.Rc5 Kb6 47.a8Q Kc5 48.Qb7 fe4 49.Qc7 Kd4 50.Qg7 Kc5 51.Qe5 Kc4 52.Qe4 Kb5 53.Qd5 Kb6 54.Qh5 Kc6 55.Qf3 Kd6 56.h4 Kd7 57.h5 Kd6 58.h6 Ke6 59.h7 Kd7 60.Qf5 Kd6 61.h8Q Kc7 62.Qhc8 Kd6 63.Qfe6) 44...Rb7 (44...Rd8 45.Kc4 Kb8 46.Rh5 Ka7+–) 45.Rb7 Kc6 46.Rf7 h4 (46...Kd5 47.a7 Kd6 48.a8Q Kc5 49.Qa5 Kd6 50.Kd4 h4 51.Qd5) 47.a7 Kd5 48.a8Q Kc5 49.Rc7 (49.Qa5 Kd6 50.Kd4 Ke6 51.Qd5) 49...Kb4 (49...Kd6 50.Rc6 Ke7 51.Qb7 Ke8 52.Rc8) 50.Qb7 (50.Qb8 Ka4 51.Ra7) 50...Ka3 (50...Ka5 51.Rc2 Ka4 52.Ra2) 51.Rc6 (51.Rc6 Ka4 52.Ra6) 1–0. BeepBeepImAJeep (2570) – moshakvar (2315), lichess.org, 2016.

6.cb5 d5 7.Nf3 Nbd7 8.a4 b6 9.Be2 Bd6 10.0-0 0-0+= 11.d4 Re8 12.Ne5 Be5 13.de5+= Ne4 14.Qd4 f6 15.Bg4 Ne5=+ 16.Bh5 g6 17.f4 Nc4–/+ (18.Bf3 e5 19.fe5 fe5–+ (< 19...Nb2 20.Be4 Re5 21.Nd2+=); 17...gh5?! 18.fe5 f5 19.Nd2=) 0–1. Trokenheim,Marek – Nilsson,Stefan, corr SSKK 3–83, 1983.

6.cb5 d5 7.Nf3 Nbd7 8.Be2 =.

6.cb5 d5 7.Nf3 Be7 8.Be2 0-0 9.0-0 Nbd7 10.a4 Nc5 11.d4 Nce4 12.Nbd2 Bb4 13.Bd3 Qd6 14.Qc2 Nd2 15.Nd2 g6 (15...Bd7 16.Bc3=) 16.Nf3 Bd7 17.h3 Rfc8 18.Qb1 Ne8 19.e4 (19.Qd1 Rc7+=) 19...Ng7 (19...de4!? 20.Be4 Rab8=) 20.e5+= Qe7 21.Rc1 Nf5 22.Rc2 Rc2 23.Bc2 Rc8 24.Bf5 ef5 25.Qd3 Rc4 26.Qe3 Kg7 (26...Be6 27.Bc1+=) 27.Bc1+= Qf8 28.Qh6 Kg8 29.Qf8 Bf8 30.Be3 (30.Bd2 Bb4+=) 30...Kg7 (30...h6 31.Nd2 Rc3 32.h4=) 31.Nd2 Rc3 32.Kf1 Bb4 33.Ke2 b6 34.f4 (34.Nf3 Rc2 35.Kd1 Rb2+=) 34...h6 35.Ra2 Rc1 36.Nb3 Re1 (36...Rc4 37.Bd2=) 37.Kf2 Rb1 38.Nc1 Be7 39.Rc2 Kf8 40.Rc7 Ke8 41.Rc2 (41.Ne2 Bb4 42.Rb7 Ra1=) 41...Ra1 42.Na2 g5 43.Nc3 Be6 44.g4 f6 45.Rc1 (45.ef6 Bf6 46.gf5 Bf5=) 45...Rc1+= 46.Bc1 fg4 47.hg4 fe5 48.de5 Bg4 49.Nd5 Bd8 50.fg5 hg5 51.Be3 Bd1 ½–½. Koerner,S – Trauna, corr, 1973.

5.e3 Be7

6.Bd3 0-0 7.Qc2 g6 8.h4 d5 9.Na3 Nbd7 10.h5= Nh5 11.Rh5+= Ba3 12.Ba3 gh5 13.Bf8 Nf8= 14.Nf3 Bd7 15.Ke2 cb5 16.cb5= Qf6 17.Rh1 e5=+ 18.Rh5 h7 e4–/+ 19.Be4 de4 20.Qe4 Qg6?? 21.Rg5+– Bb5 22.Kd1 Qg5 23.Ng5 Bc6 24.Qf5 Be8 25.d4 h6 26.Ne4 Bc6 27.Nf6 Kg7 28.Nh5 Kg8 29.Nf6 (29...Kg7 30.Qe5+–; better is 29.Qf6 Ne6 30.Qh6+–) 1–0. Kuipers,Stefan – Schenkeveld,Daniel, NED–ch U12 Hengelo, 2002.

6.Bd3 d5 7.Nf3 =.

6.Nf3 0-0

7.Be2 d5 8.0-0 dc4 9.Nc3 a4 =.

7.Be2 d5 8.a4 cb5 9.cb5 b6 10.0-0 Bb7 11.d4 Nbd7 12.Nbd2 Rc8 13.Qb3 Bb4 14.Rac1 Qe7 15.Qa2 Ne4 16.Ne4 de4 17.Ne5 Ne5 18.de5 Bd5 19.Bc4 Bd2 20.Ba3 Bb4 21.Bb4+/– Qb4 22.Bd5 ed5 23.Qd5 Rc1 24.Rc1 Qa4 25.e6 fe6 26.Qe6 Kh8 27.Qb6 Qa2 28.Rf1 a4 29.Qc5 Kg8 30.b6 a3 31.b7 Qf7 32.Qc8! a2 33.Rc1 Qf2? 34.Kh1+– Qb2 35.Rf1 Qf6 36.Qf8 (36...Kf8 37.Rf6 gf6 38.b8Q Ke7 39.Qa7 Kf8 40.Qa2+–) 1–0. Bendig,Frank – Borrmann,Fritz, corr SOK–88–27, 1990.

7.Be2 d5 8.a4 cb5 9.cb5 b6 10.0-0 Bb7 11.d4 Nbd7 12.Nbd2 Rc8 13.Qb3 Rc7 14.Rac1+= Rc1 15.Rc1 Qb8 16.Ne1 Bd6 17.Nd3 Bh2–/+ 18.Kf1 Bd6 19.Nf3 Ng4 20.Ng5 Ndf6 21.Qd1 h5 22.Rc3 g6 23.Qd2 Ne4–/+ 24.Qd1?? Nc3 25.Bg4 Nd1 (26.Bd1 Qc7–+) 0–1. Monch – Muhle,Dirk, corr, 1972.

7.Be2 d5 8.a4 cb5 9.cb5 b6 10.0-0 Bb7 11.Bf6 Bf6 12.d4 Nd7 =.

7.Be2 d5 8.a4 cb5 9.cb5 b6 10.0-0 Nbd7 11.Nd4 Qc7 12.Na3 =.

7.Be2 d5 8.a4 dc4 9.0-0 =.

7.Be2 d5 8.a4 dc4 9.Bc4 cb5 10.ab5 =.

7.Be2 d5 8.Nc3 cb5 9.cb5 Nbd7 =.

4.Bb2 g6

5.a4 Bg7 6.e3 0-0 7.Nf3 d6 8.d4 Nbd7 9.Be2 Re8 10.0-0 d5 (10...Qc7 11.Nc3=) 11.Nbd2 Nf8 12.cd5 (12.c5 Bf5+=) 12...Nd5 (12...cd5 13.Rc1+=) 13.Qb3 h6 (13...Be6 14.bc6 bc6 15.Qa3+=) 14.Ne5 Be6 15.bc6 bc6 (15...Nb4!? 16.Ndc4 bc6+–) 16.Nc6+– Qc7 17.Bb5 Nb4 18.Qc3 Nc6? (better 18...Rec8!? 19.Nb4 Qc3 20.Bc3 Rc3+–) 19.Bc6 (19.Qc6?! Rec8 20.Rfc1 Qc6 21.Bc6 Ra7+–) 19...Rac8 (19...Qb6 20.Ba8 Ra8 21.Ba3+–) 20.Be8 Qc3 21.Bc3 Rc3 22.Rfc1 (22.Rfc1 Rd3 23.Nf1+–) 1–0. Janek – Lerpez, internet, 2017.

5.e3 Bg7 6.a4 0-0 7.Nf3 d5 8.Be2 Nbd7 9.0-0 Re8 (9...dc4 10.bc6 bc6 11.Na3=) 10.d4+= Ne4 11.Nc3 Nc3 12.Bc3 Nf6 13.Rc1 Ne4 14.Bb2 Bg4 15.Nd2 (15.h3 Bf5+=) 15...Be2= 16.Qe2 Nd2 17.Qd2 e5 18.de5 Be5 19.Be5 Re5 20.Rfd1 Qe7 21.h3 dc4 22.Rc4 (better 22.bc6!? Rc5 23.cb7 Qb7 24.Qc2=) 22...cb5=+ 23.ab5 a4 (23...Rb5!? 24.Qc2 Qe5=+) 24.b6 a3 (better 24...Qe6!? 25.Qb4 a3=) 25.Rc7+– Qf6 26.Qa2 (26.Rb7!? Rb5 27.Ra7+–) 26...Rb5 27.Rb7 (better 27.Rd6! Qf5 A) 28.Rb7?? Rb2 29.Rf7 Qf7 (worse 29...Ra2 30.Rf5 gf5 31.b7–+) 30.Qf7 Kf7 31.Rd7 Ke6–+; B) 28.e4+=) 27...Rb2=+ Do you see the mate threat? 28.Qd5 Qf2 (28...Rf2? 29.Rf7 Qf7 30.Qa8 Kg7 31.b7+– (worse 31.Qa3 Ra2 32.Qc3 Kh6+–)) 29.Kh1 (29.Kh2 Ra5 30.Qd8 Kg7 31.Rf7 Qf7=) 29...a2 (29...Re8!? 30.Kh2 a2–/+ (30...Re3?! 31.Qd8 Kg7 32.Rf7 Qf7 33.Qd4 Qf6 34.Qe3+=)) 30.Rf7=+ Threatening mate... how? 30...Qg2?? (better 30...Qf7 31.Qa8 Kg7=+) 31.Qg2+– Rg2?? (31...a1Q 32.Ra1 Ra1 33.Rf1 Rg2 34.Kg2 Ra8+–) 32.Ra7 Rf8 (32...Rb2 33.Ra8 Kf7 34.Rd7 Ke6+–) 33.Kg2 (33.Kg2 Rb8 34.Rc7+–) 1–0. BeepBeepImAJeep (2575) – Unstoppablle (2220), lichess.org, 2017.

5.e3 Bg7 6.Qc2 (6.Nc3 0-0=) 6...0-0 (6...cb5 7.cb5 d5 8.Nf3=) 7.Nf3 cb5 8.cb5 d5 9.Be2 Bf5 10.d3 a4 11.0-0 Nbd7 (11...Qd7 12.Na3=) 12.Nd4+= Be6 (12...Qc8 13.Rc1+= (13.Nf5?? Qc2 14.Ne7 Kh8–+)) 13.Nc3 (13.Rc1 Bg4+=) 13...Qc7 (13...a3 14.Bc1=) 14.Rac1 Rfc8 (14...a3 15.Ba1 Qd6 16.Nd1+=) 15.Qd2 (15.Ba3 Ne5+=) 15...Qd8 (15...Qd6 16.f4=) 16.h3 (16.Ne6 fe6 17.a3 Nc5+=) 16...Nb6 17.Ne6 fe6 18.Ba3 (18.a3 Rc5+=) 18...e5 19.f4 (19.Qb2 e4+=) 19...d4= 20.Ne4 (20.Nd1 de3 21.Ne3 Bh6=+) 20...de3=+ 21.Qe3 Nbd5 22.Rc8 Rc8 23.Nf6 Bf6–/+ 24.Qd2 ef4–+ 25.d4 g5 26.Bb2 Ne3–+ 27.Rb1?? Rc2 28.Qd3 Qd5 29.Bf3 Rg2 (30.Kh1 Qf3 31.Qb3 ab3 32.ab3 Qh3) 0–1. Frenzel,Lothar – Borrmann,Fritz, corr KGP, 1985.

5.e3 Bg7 6.Nf3 0-0 7.Be2 d6 8.d4 e5 9.0-0 e4 10.Nfd2 d5 11.Nc3 Re8 12.a4 Bf5 13.Qb3 h5 (13...Qd6 14.Ba3 Qe6 15.h3+=) 14.bc6 bc6 15.cd5 (15.Ba3 Na6+=) 15...cd5+= 16.Ba3 Na6 17.Rfc1 Rb8 18.Bb5 Nc7 19.Bc5 (19.Qa2 Re6+=) 19...Bh6 (19...Na6 20.Qc2 Nc5 21.dc5=) 20.Qa2 White gets the initiative 20...Nb5 (20...Re6 21.Nb3 Ng4 22.Qe2+–) 21.ab5 Ng4 (21...Ra8 22.b6 Ng4 A) 23.Nd5?! Qh4+=; B) 23.Qd5 Qh4 24.Nf1 Qf2 25.Kh1 Be3 (25...Ne3?! 26.Ne3 Be3 27.Rf1=+) 26.Ne3 Qe3–+ (26...Ne3?! 27.Qa2 Ng4 28.h3=); C) 23.Rc2+–) 22.Nf1 (22.Qa5 Qh4 23.Nf1 Qf2 24.Kh1 Be3 (24...Ne3?! 25.Ne3 Qe3 26.Nd5=) 25.Ne3 Ne3–/+) 22...h4 (22...Be6 23.h3 Nf6 24.Qa5+–) 23.Qd5+– Qg5 24.Ra5 h3 (24...Nf6 25.Qd6+–) 25.g3 (better 25.Ra7 Re6 26.g3+–) 25...Qh5? (better 25...Red8 26.Qc4 Rdc8+–) 26.Ra7 Rf8 (26...Re6 27.Qd7 g5+–) 27.Bf8 Rf8 28.Ne4 Kh8 (28...Be4 29.Qe4 Nf6 30.Qc6+–) 29.Rf7 (29.Nd6 Bg7 30.Nf7 Kh7+–) 29...Ne3 (29...Be4 30.Rf8 Bf8 31.Qe4 Nf6+–) 30.Qe5 (30.Qe5 Kg8 31.Nf6 Kf7 32.Rc7 Bd7 33.Rd7) 1–0. onur604 (2320) – epiphany90 (2365), lichess.org, 2020.

5.e4 Bg7 6.e5 Ne4 7.d3 Nc5 (7...Ng5 8.Qd2 f6 9.ef6 ef6 10.f4=) 8.d4+= Ne6 9.bc6 dc6 (worse is 9...Nc6 10.d5 Ne5 11.Bc3+/–) 10.Nf3 0-0 11.Nc3 f6 12.ef6 ef6 13.g3 (13.c5!?=) 13...Re8 14.Ne2 f5 15.Bg2 c5 16.0-0 cd4 (16...Nc6!?+=) 17.Nfd4 Nd4 (17...Nc6!? 18.Nc6 Qd1 19.Rfd1 Bb2=) 18.Nd4+= Bd4 19.Bd5 (19.Bd4!? Nc6 20.Bc3+=) 19...Qd5= 20.cd5 Bb2 21.Rb1 Bg7 22.Re1 Rd8 23.Qc2 Na6 24.Qc4 Bf6 (better is 24...Bf8+/–) 25.d6 (better is 25.Rb6 Bg5 26.f4 Bf4 27.d6 Kh8 28.Re7 Be5 29.Qf7 Bd4 30.Kg2 Bb6 31.Qh7) 25...Kg7= 26.Rb6 Nb4 27.a3 Nc6 28.Rd1 Ne5 29.Qd5 Nc6 30.Qc4 Ne5 31.Qd5 Nc6 ½–½. Wall,William Dale – Chase,Stephen, postal, 1989.

5.Nf3 Bg7 6.e3 0-0 7.Bd3 d5 8.Qc2 dc4 9.Bc4 cb5 10.Bb5 Bf5 11.Qb3 Nc6 12.0-0 Rc8 13.Rc1 Qb6 14.Nc3 Na7 15.Bc4 Qb3 16.ab3 Nc6 17.d4 e6 18.Nh4 Be4 19.Ne4 Ne4 20.Bb5 Na7 (20...Nd2!? 21.Rc3 Rfd8=) 21.Rc8+/– (21.Ra5 Rc1 22.Bc1 Nb5 23.Rb5 Ra8 24.Rb7 Ra1–/+) 21...Rc8 22.Bd3 (worse is 22.Ra5 Nb5 23.Rb5 Rc2–/+) 22...Nc5 23.dc5 Bb2 24.Ra5 Nc6 25.Rb5 Rc7 26.Nf3 ½–½. Pisar,Juraj (1655) – Danada,Ondrej (1810), SVK–chT2A, 2008.

5.g3 Bg7 6.Bg2 0-0 7.Nf3 d5 8.bc6 dc4 9.cb7 Bb7 10.0-0 Na6 11.Na3 Rc8 12.Nb5 Nb4 13.a3 Nbd5 14.Rc1 a4 (14...Qb6 15.Rb1 Qe6=) 15.Nfd4?? (15.Qa4 Nb6 16.Qd1 g5+/–) 15...Qb6 (15...e5 16.Na7 Rc5 17.Ndb5+=) 16.Ba1?? (16.Qa4 e5 17.Qa7+=) 16...e5–/+ 17.Rb1 (17.Qa4 ed4 18.Bd4 Qe6–/+) 17...ed4–+ 18.Nd4 Qc7 19.Nb5 Qd7–+ 20.Nd4 Rfd8 21.e4 Ne7 22.Rb7 Qb7 23.e5 Nfd5 24.e6 f5 25.Qa4 Qb6 26.Nb5 Ba1 27.Ra1 Ra8 28.Qd1 Qb5 29.Rb1 Qc5 30.Rb7 Ra3 31.h4 Rg3 32.Qe2 Nf4 33.Qf3 Rg2 34.Qg2–+ Ng2 35.Kg2 Qc6 (35...Qc6 36.Kf1 Qb7 37.Kg1 Rd4 38.d3 Rg4 39.Kf1 Qb1 40.Ke2 Qd3 41.Ke1 Re4; 35...Rd2 36.Rb5 Qf2 37.Kh3 Qe3) 0–1. Salvatore – kehrsam, ChessWorld.net, 2006.

4.e3 cb5

5.cb5 d5 6.Bb2 Bf5 7.Nf3 (7.Bf6 gf6 8.Nc3 e6=) 7...Nbd7 8.Be2 e6 (8...Rc8 9.0-0=) 9.0-0 (9.Nh4 Bb1 10.Rb1 Rc8=) 9...Bd6 (9...Rc8 10.d3=) 10.Nc3 (10.Nd4 Bg6=) 10...0-0 (10...e5 11.d4 e4 12.Nd2=) 11.Nh4+= Bg6 12.Ng6 (12.Rc1 Rc8=) 12...hg6+= 13.f4 (13.Rc1 Rc8+=) 13...Qe7 14.Bf3 Rfc8 (14...Rac8=) 15.d3 (15.Rc1 Nb6=) 15...Rc7 (15...Ba3 16.Ba3 Qa3 17.Na4+=) 16.Rc1 (16.Qd2 Rac8=) 16...Rac8 17.Qd2 (17.Na4 Rc1 18.Bc1 e5=) 17...Bb4+= 18.a3 Ba3–/+ 19.Ne2 Bb2 20.Qb2 Rc1 21.Rc1 Rc1 22.Nc1 e5 23.Kf2 a4 24.Qc3 e4–+ 25.de4 de4 26.Be2 Nd5 27.Qd2 Qc5 28.Na2 N7b6 29.Qc1 Qc1 30.Nc1 a3 31.Na2 Na4 32.Bc4 Ndc3 33.Nc3 Nc3 34.Ke1 a2 35.Ba2 Na2 (35...Na2 36.Kd2 f5–+) 0–1. Malmstroem,Jan – Pommerel,Wim, email 4AMM–05, 1997.

5.cb5 d5 6.Nf3 =.

4.e3 g6

5.Bb2 Bg7 6.Qc2 (6.Nc3 0-0=) 6...0-0 7.Nf3 cb5 8.cb5 d5 9.Be2 Bf5 10.d3 a4 (10...Qd6 11.Nc3=) 11.0-0 Nbd7 (11...Qa5 12.Nd4=) 12.Nd4 (12.Rc1 Nb6=) 12...Be6 (12...Bg4 13.f3 Bh5 14.Qd2=) 13.Nc3 Qc7 (13...a3 14.Bc1+=) 14.Rac1 (14.Ba3 Rfc8 15.Rac1 Qd8+=) 14...Rfc8 (14...a3 15.Ba1 Qd6 16.Nd1+=) 15.Qd2 (15.Ne6 fe6 16.a3 e5+=) 15...Qd8 (15...Qd6 16.f4=) 16.h3 (16.Ne6 fe6 17.a3 Nc5+=) 16...Nb6 (16...Nc5 17.Ba3=) 17.Ne6+= fe6 Black gets strong initiative 18.Ba3 e5 19.f4 (19.Qb2!?+=) 19...d4+= 20.Ne4 de3 21.Qe3 Nbd5 22.Rc8 Rc8 23.Nf6 Bf6–/+ 24.Qd2 ef4 25.d4 g5 26.Bb2? Ne3–+ 27.Rb1?? Rc2 28.Qd3 Qd5 29.Bf3 Rg2 (29...Rg2 30.Kh1 Qf3 31.Qb3 ab3 32.ab3 Qh3) 0–1. Frenzel,Lothar – Borrmann,Fritz, corr SOK–90–56, 1990.

5.Nc3 Bg7 6.Bb2 0-0 7.Nf3 d6 8.h4 Bg4 9.Be2 Nbd7 10.Ng5 Be2 11.Qe2 e5 12.0-0-0 (12.Ba3!?=) 12...cb5 13.Nb5 Nc5 14.d4 ed4 15.Bd4 Nce4 16.f3?? (better is 16.Bf6 Nf6 17.Nd6+=) 16...Ng3–+ 17.Qe1 Nh1 18.Qh1 Rc8 19.Qf1 h6 20.Ne4 Ne4 21.Bg7 Ng3 22.Qd3 (22.Qe1 Qh4 23.Rd4 Rc4 24.Kd2 Rd4 25.Bd4–+) 22...Kg7 23.Nd6 Rb8 24.Qc3 Kh7 25.Qa5 (25.Kb2–+) 25…Qa5 0–1. combijack (1910) – belvedere (1795), gameknot.com, 2013.

4.Nf3 d5

5.cd5 cd5 6.e3 Bf5 7.Ba3 Nbd7 8.Nc3 e5 9.Bf8 Kf8 10.Be2 Qe7 (10...Rc8 11.Rc1+=) 11.0-0+= Rc8 12.Rc1 b6 13.Qb3 (13.d4 e4 14.Nd2 Qb4+/–) 13...Nc5 Black plans e4 14.Qb2 (14.Nd5 Qe6 15.Nb6 Qb6+= (worse is 15...Nb3 16.Rc8 Ne8 17.Rc6+/–)) 14...e4 15.Nd4 Bd7 16.Nb3 Qd6 17.Nc5 Rc5 18.Na4 Rc1 19.Rc1 Ke7 20.d3 ed3 21.Bd3 Rb8 22.h3 Kf8 23.Qd4 Kg8 24.Rd1 Be6 25.Be2 Qc7 26.Bf3 Qc4 27.Nc3 Increasing the pressure on the isolated pawn on d5 27...Rc8 28.Nd5 Bd5 29.Bd5 Qb5 30.Bb7 Rb8 31.Ba6 Qc6 32.Bc4 b5 33.Qa7 Rf8 34.Bd3 Qc3 35.Qb6 Qa3+= 36.Qb5 Qa2 37.e4 h6 38.e5 Nh7 39.h4 Qe6 40.Bc4 Qg4 41.Rd7 Qf5 42.Ra7 Qf4 43.g3+– Qf5 44.Qa5 Kh8 45.Qd5 1–0. Fournier,Frederic – Robeson,Christian, chess.com, 2009.

5.cd5 Nd5 =.

5.e3 dc4 6.Bc4 cb5 7.Bb5 Bd7 =.

3.c4 d5

4.ba6 Na6 5.cd5 =+.

4.cd5 Nd5 5.d4 Bf5 =+.

4.e3 e5 5.cd5 Nd5 6.d4 Bb4 7.Bd2 ed4 8.Bb4 Nb4 9.a3 =+.

4.e3 g6

5.Bb2 Be6 6.cd5 Bd5 7.Nc3 =.

5.Bb2 Bg7 6.d4 0-0 7.Nf3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.d4 a5 7.b5).

5.Bb2 Bg7 6.cd5 0-0 =.

5.Bb2 Bg7 6.Nf3 0-0 7.Nc3 Qd6 8.Be2 (8.Nd5 Nd5 9.Bg7 Kg7 10.cd5 Qd5+=) 8...Bg4 (8...dc4 9.Bc4 Be6 10.Be6 Qe6 11.d4=) 9.0-0 (9.Nd5 Nd5 10.Bg7 Kg7 11.cd5 Qd5+=) 9...b6 (9...dc4!? 10.Bc4 Qb4=) 10.h3 (10.Nd5 Nd5 11.Bg7 Kg7 12.cd5 Qd5+/–) 10...Bf3 11.Bf3 (worse is 11.gf3 d4 12.ed4 Qd4+=) 11...e6 12.a4 (better is 12.cd5 ed5 13.Qb3+/–) 12...Ra7? (better is 12...c6+=) 13.Ba3+– c5 14.bc6! Qc6 (14...Nc6 15.Bd6 Decoy; 14...Qc6 15.Bf8 Pinning (15.Bf8 Deflection)) 15.Bf8 Kf8 16.Rc1 (better is 16.cd5 ed5 17.Rc1 Qd7+–) 16...Rb7 (16...Rd7 17.cd5 Qd6 18.Nb5+–) 17.Qe2 (better is 17.cd5 Qd6 18.Nb5 Qd8 19.de6 Re7 20.ef7 Na6+–) 17...Na6 18.cd5 Nd5 19.Nd5 ed5 20.Rc6 (20.Rc6 Nb4 21.Rc8 Ke7 22.d4+–) 1–0. wlittle (2115) – rcroes (2150), net–chess.com, 2004.

5.cd5 Bf5 =.

3.c4 e5

4.Bb2 Bc5 5.Nf3 d6 6.d4 ed4 7.Nd4 Bb4 8.Nc3 =+.

4.Nc3 Bb4 5.Bb2 0-0 6.a3 Bc3 7.Bc3 d6 8.g3 (8.d4 Nbd7=) 8...Be6 (8...Nbd7 9.Bg2+=) 9.e3 (9.d3 Nbd7=) 9...Nbd7 10.d3 e4 11.d4 c6 12.bc6 (12.Rb1 Qc7 13.Qd2 a4+=) 12...bc6 13.Nh3 (13.Rb1 Qc7+=) 13...Nb6–/+ 14.c5 Nbd5 15.Qc2 dc5 16.dc5 Nc3 17.Qc3 Nd5 18.Qe5 (18.Qd2!?–/+) 18...a4–+ 19.Bg2? (better is 19.Qd4–+) 19…Qa5 (19...Qa5 20.Kf1 Nc3–+) 0–1. Wiley,Randall – McFarland,Hardon H, corr, 1987.

4.e3 Bc5 +=.

4.Bb2 d6

5.Nc3 Be6 6.e3 Nbd7 7.Nf3 Be7 8.d3 0-0 9.Be2 c6 10.0-0 Rb8 11.Rc1 h6 12.Qc2 Qb6 13.d4 d5? (better 13...cb5 14.Nb5 e4+=) 14.de5+– Nh7 (14...Ne4 15.Ne4 de4 16.Qe4+–) 15.Nd4 (better 15.cd5 cd5 16.Rfd1+–) 15...Ne5? (better 15...Nc5+–) 16.Ne6 fe6 17.Na4 Qd8 18.Be5 Bd6 19.Bb2 e5 (19...cb5 20.Qg6 Nf6 21.cb5 Qe8 22.Qe8 Rbe8+–) 20.c5 Be7 21.Be5 cb5 (21...Ra8 22.Nb6 Ra7 23.e4+–) 22.Nb6 Rc8 23.Nc8 Qc8 24.Bb5 Nf6 25.Rfd1 Qe6 (25...Rd8 26.c6 bc6 27.Bc6+–) 26.Bf6 Bf6 27.Rd5! Qd5 Decoy theme: d5 (27...Qc8 28.Qg6 Be7 29.Bc4+–) 28.Bc4 A pinning theme 28...Qc4 29.Qc4 Kh7 30.Rb1 (30.Qe4 Kg8 31.Qd5 Kh8 32.Qb7 Bh4+–) 30...Rd8 31.Qc2 Kh8 32.Rb7 a4 33.c6 Be5 34.f4 Bd6 35.Qg6 (35.Qg6 Be7 36.Re7 Rd1 37.Kf2 Rd2 38.Kf3 Rf2 39.Kf2 Kg8 40.Qg7) 1–0. marekt – workchess, net–chess.com, 2020.

5.Nc3 Be6 (5...Be7 6.Nf3=+) 6.e4= Nbd7 7.Qc2 Be7 (7...Nc5 8.Nf3=) 8.Nf3 h6 (8...Nc5 9.Be2=) 9.a4 (9.Be2 c5=) 9...0-0 (9...Bg4 10.Be2=) 10.Be2 Nb6 (10...Bg4 11.0-0=) 11.Nd5 c6 (11...c5 12.bc6 bc6 13.Nf6 Bf6 14.0-0=) 12.Nf6 Bf6 13.0-0 (13.bc6 bc6 14.c5 dc5 15.Ne5 Qd6=) 13...Rc8 (13...cb5 14.ab5 Qc7 15.d3=) 14.d3 d5 (14...Qc7 15.Bc3 Ra8 16.Rfb1=) 15.Ne5 (15.bc6!? Rc6 16.ed5 Bd5 17.Ne5 Be5 18.Be5+/–) 15...cb5 16.ab5 de4 17.de4 (< 17.Ra5 ed3 18.Qd3 Nc4 19.Nc4 Bc4 (19...Rc4?! 20.Bf6 Qa5 21.Qg3+=) 20.Qd8 Bd8–/+ (< 20...Rfd8 21.Bf6 Be2 22.Bd8 Bf1 23.Kf1 Rd8 24.Ra7+=)) 17...Be5 18.Be5 Bc4 19.Ra5 (better is 19.Qb2!? Be2 20.Qe2=) 19...Be2–/+ 20.Qe2 Nc4 21.Ra7 (21.Bg7 Kg7 (21...Na5?! 22.Bh6 Qf6 23.Qg4 Qg6 24.Qg6 fg6 25.Bf8 Kf8 26.f3=; 21...Qa5 22.Bf6 Ne5 23.Be5+/–) 22.Ra4 Qd2–/+) 21...Ne5 22.Rb7 Qd3 (23.Qd3 Nd3=+; 22...Rc4 23.Re1–/+) 0–1. Kerner,Horst – Deneuville,Christian, corr ICCF Cup X, 1994.

3.c4 e6

4.a4 Bb4 5.Qb3 0-0 6.g3 d5 7.Bg2 dc4 8.Qc4 e5 9.Nf3 e4 10.Ne5 Be6 11.Qc2 c6! 12.0-0 (12.bc6 Nc6 Decoy) 12...cb5 13.Be4 Nbd7 14.Bb7 (better is 14.Nd7!? Qd7 15.Bg2 ba4 16.Ra4–/+) 14...Ne5–+ 15.Ba8 Qa8 16.Bb2 (16.ab5 Bh3 17.f3 Bf1 18.Kf1 Nf3–+) 16...Bh3 17.f3 Bf1 18.Be5 (18.Kf1 Qd5 19.ab5 Qb5 20.Qf5–+) 18...Be2 19.Bf6 (19.Nc3 Qf3 20.Nb5–+) 19...Qf3 20.Nc3 Bd3 21.Qc1 Bc5 22.Bd4 Bd4 0–1. 321sacrifice419 – PeterRs, ChessWorld.net, 2016.

4.d4 Ne4 =.

4.e3 e5 5.Bb2 d6 6.d4 =.

4.Nf3 d5 5.e3 Be7 6.Be2 0-0 7.0-0 c5 8.Bb2 Ne4 9.d3 Nf6 10.Qc2 Nbd7 11.Nbd2 b6 12.g3 Bb7 13.e4 d4 14.Rae1 Ne8 15.Bc1 f5 16.ef5 ef5 17.h3 Bd6 18.Bd1 Qc7 (18...Nc7 19.Kh2+=) 19.Kh2 g6 20.Ng5 Ng7 21.Bf3 Rae8 22.Qd1 Ne5 23.Bb7 Qb7 24.Ndf3 f4 25.g4 Ne6 26.Ne4 (worse is 26.Ne5 Ng5 27.h4 Re5 28.hg5 Rg5–+) 26...Bb8 27.Ne5 Be5 28.f3 Qc7 29.Kg2 Kg7 30.a4 Bf6 31.Re2 Ng5 32.Rfe1 Ne4 33.Re4 Re4 34.Re4 g5 35.h4 h6 36.Qe1 Rf7 37.h5 Re7 ½–½. Melich,Jindrich (2070) – Haspl,Miroslav (2105), CZE–chT2c, 2005.

4.a3 d5

5.d4 dc4 6.e3 Bd6 =.

5.e3 c5 6.Nf3 =.

5.e3 e5 6.d4 ed4 7.Qd4 =.

5.e3 Be7 6.Nf3 0-0 7.Bb2 c5 (7...Nbd7 8.d4=) 8.Qc2 (8.d4 cd4 9.Bd4 dc4 10.Bc4 Nbd7=) 8...b6 9.d3 dc4 (9...Bd6 10.Be2=) 10.dc4 Bb7 11.Nbd2 Nbd7 12.Bd3 Qc7 13.Rg1 (13.0-0 h6+=) 13...Bd6 14.0-0-0 (14.g4 A) worse is 14...Bh2 15.Rh1+/– (15.Nh2?! Qh2 16.0-0-0 h6=); B) 14...Ne5 15.Be5 Be5+=) 14...Ne5 (14...Be5 15.g4 Bb2 16.Qb2=) 15.Be5+= White fights for the Initiative 15...Be5 16.g4 h6 (16...g6 17.Ne5 Qe5 18.g5=) 17.h4 (17.g5 hg5 18.Rg5 Bd6+=) 17...Bh2 (17...Nd7!?+=) 18.Rg2 (18.Nh2 Qh2 19.g5 hg5 20.hg5 Nd7+/–) 18...Bd6 19.g5 Ne8 (better is 19...hg5!? 20.hg5 Nd7 21.Bh7 Kh8+–) 20.gh6+– f5 21.Rdg1 Rf7 22.h5 Kh8 23.Qc3 e5 24.hg7 Ng7 25.Rg6 Raf8 26.Rh6 Kg8 27.Nh4 Rd8 28.Ng6 Rf6 29.f4 Re8 30.e4 Kf7 31.ef5 Bf8 32.Ne4 Rg6 33.hg6 Ke7 34.f6 Kd8 35.Rh8 Be4 36.Be4 Bd6 37.fg7 Qg7 38.Qd2 Rh8 39.Qd6 Kc8 Black threatens to counter with Qd7 40.Qc6 (40.Qc6 Kb8 41.Qa8 Kc7 42.Qb7 Kd6 43.Rd1 Ke6 44.Qc6 Ke7 45.Rd7 Ke8 46.Qc8#; 40.Rd1 Qc7 41.g7 Rd8 42.Bf5 Kb7 43.Qd8 Qd8 44.Rd8 e4 45.Rd7 Kb8 46.g8Q#) 1–0. Taulien,H – Brueske,T, remoteschach.de, 2003.

5.e3 Be7 6.Nf3 0-0 7.Nc3 Nbd7 8.d4 dc4 9.Bc4+= Nb6 10.Bb3 (10.Bd3 Nfd5 11.Bd2 Nc3 12.Bc3 Nd5+=) 10...a4 11.Ba2 Nbd5 12.Na4 Bd7 13.Bc4 c6 14.Rb1?? (better is 14.b6+=) 14...Qa5–+ 15.Bd2 Qa4 16.Rb3 (16.Qa4 Ra4 17.Ne5–+) 16...Qc4 17.Ne5 Qa4 18.0-0 (18.Nd7 Nd7 19.bc6 Qc6–+) 18...c5 19.dc5 (19.Rb1 Qa3 20.dc5 Bc5–+) 19...Bb5 20.f3 (20.Re1 Ne4 21.Rb2 Bc5 22.Qa4 Ba4–+) 20...Bf1 21.Kf1 Bc5 22.Kf2 Bd6 23.Nd3 Qh4 24.Kg1 Qh2 25.Kf1 Qh1 26.Ke2 Qg2 27.Nf2 Nh5 28.Be1 Ng3 29.Kd2 Ne3! 30.Re3 Bf4 31.Kc2 Be3 32.Kb1 Rfd8 33.Nd3 Ra3 34.Qc2 Ra1! 35.Kb2 Ra2! 36.Kb3 Qc2 37.Kb4 Rd4 (37...Rd4 38.Kb5 Qc6; 37...Ra4 38.Kb5 Qc6) 0–1. Tortoza,Carlos – Valverde,Mario (2055), CiF, 2006.

5.e3 Be7 6.Nf3 0-0 7.Nc3 Nbd7 8.d4 c5 9.cd5 ed5 10.dc5 Nc5 11.Be2 Nce4 12.Bb2 Nf2 (12...Be6!?=) 13.Kf2+/– Ng4 14.Kg1 Ne3 15.Qc1 d4 (15...Nf5 16.Na4+/–) 16.Nd1 (16.Ne4 Re8 17.Bd4 Nf5+/–) 16...d3 (16...Bf6!?+/–) 17.Bd3! Ng2 (17...Qd3 Decoy to d3 18.Qe3 A double attack) 18.Bh7 (18.Kg2?! Qd3 19.Qc3 Qg6 20.Kf2 Bf6+=) 18...Kh7 19.Kg2 Bf5 (19...Qd3 20.Qb1 Bf5 21.Qd3 Bd3 22.Re1+–) 20.Rf1 (20.Qf4 Qd3+–) 20...Qd7 (20...Qd6 21.Nf2+–) 21.Rf2 Rac8 22.Qf4 Bh3 23.Kh1 Qb5?? 24.Nc3 Qh5?? 25.Qe4 Bf5 26.Qe7 (26.Qe7 f6 27.Nd4+–) 1–0. Escher,H – Goeke,B, Frankfurt, 1999.

5.e3 Be7 6.Nf3 0-0 7.d4 c6 =.

4.e3 d5

5.Nf3 Bb4 6.a3 Be7 7.d4 =.

5.Nf3 Bb4 6.Be2 0-0 (6...dc4 7.Bc4 Nbd7 8.0-0=) 7.0-0 dc4 8.Bc4 b6 (8...c6 9.Ba3=) 9.Bb2 (9.d4 Bb7=) 9...Bb7 10.d4 (10.Nc3 Nbd7=) 10...c6 11.Ba3 Nbd7 (11...cb5 12.Bb5 Qd5 13.Bd3=) 12.bc6 Bc6 13.Bb4 ab4 14.Nbd2 Ba4 (14...Qe7 15.Qb3+=) 15.Qb1 Qe7 16.Rc1 b5 (16...Rfc8 17.Bd3+=) 17.Bd3 Rfc8 18.Qb2 (18.Ne4 Nd5+=) 18...Nd5 19.Ne4 (19.Be4 N7b6+=) 19...f5 20.Ng3 Rc3 21.Qd2 N7b6 (21...Ra3 22.Rab1+=) 22.Ne5 Rac8 23.Ne2 Qc7 24.Nc3+/– bc3 25.Qe2 b4 26.Ba6 Ra8 27.Bb5 Qa7 28.h3 Qa5 29.Bd3 Be8 30.Qf3 b3 31.ab3+– Qa1 32.Ra1 Ra1 33.Kh2 Ra2 34.e4 fe4 35.Qe4 g6 36.h4 Rf2 37.Ng4 Rf4 38.Qe6 Bf7 39.Nh6 Kg7 40.Nf7 Rf7 41.h5 Re7 42.Qg4 Ne3 43.h6 Kg8 Threatening mate... how? 1–0. Ganesan – Domenche Redondo, corr, 1997.

5.Nf3 Bd6 6.Be2 (6.d4 b6=) 6...0-0 (6...dc4 7.Na3=) 7.0-0 (7.d4 dc4 8.Bc4 Nbd7=) 7...Nbd7 (7...dc4 8.Bc4 Nbd7 9.d4=) 8.Nc3 (8.cd5 Nd5 9.d4 N7f6=) 8...dc4 9.Bc4 Nb6 10.Be2 a4 (10...e5 11.d4 e4 12.Ng5=) 11.e4 (11.d4 Bd7=) 11...e5 12.Bd3 (12.d4 Bb4 13.Nb1 ed4+=) 12...Bc5+= 13.Bc2 Bg4 14.h3 Bf3 (14...Bh5 15.g4 Bg6 16.d3+=) 15.Qf3+= Qd4 (15...Qd6 16.Qg3+=) 16.Qd3 (16.Rd1 a3+=) 16...Rfd8 17.Qe2 Qd6 (17...Rac8 18.Rb1+=) 18.Rb1 Bd4 19.Nd1 (19.Qf3 Qe6+=) 19...Qe6–/+ 20.a3 g6 (20...Qa2 21.d3–/+) 21.Bb2 (21.Qf3 c6+=) 21...Nh5–/+ 22.Bd4 (22.Qf3!?–/+) 22...Rd4 (22...ed4?! 23.Nb2+=) 23.Nc3 (23.Nb2 Nf4 24.Qe3 Nc4 25.Nc4 Qc4–/+) 23...Nf4–+ 24.Qd1 (24.Qg4 Rd2 25.Qe6 Ne6–+) 24...Nc4 (24...Qe7 25.Kh1–+) 25.d3 (25.Rb4–+) 25...Na3 26.Ra1 Nc2 27.Qc2 a3 28.Rfd1 Qd6 29.f3 Rd3 30.Rd3 Qd3 31.Qd3 Nd3 32.Nb1 a2 33.Nc3 Nb4 34.Kf2 Ra3 (34...Ra3 35.Na2 Ra2 36.Ra2 Na2–+) 0–1. Hasler,Ueli – Valverde,Mario (1995), CiF, 2005.

3.e3 d5

4.Bb2 Nbd7 5.g4 (5.Nf3!?=) 5...e5=+ 6.g5 Ne4 7.h4 (7.Nf3 Bd6=+) 7...h6 (7...a4 8.c4–/+) 8.g6 (8.Bh3 hg5 9.d3 g4 10.Bg4 Nef6–/+) 8...fg6 9.c4 (9.Bd3 Qf6 10.Be4 de4–/+) 9...Bc5 (9...Ndf6 10.b6–/+) 10.cd5=+ 0-0 Exerts pressure on the backward pawn 11.f3? (11.Rh2 Bd6=+) 11...Qf6 (better 11...Ng3!? 12.Rh2 Nf1 13.Kf1 Nf6–+) 12.Rh2 Ng3 13.Nc3 (13.Bd3 Nf5=+) 13...e4 (13...Nf1 14.Kf1 Bd6 15.d3–/+) 14.f4 (14.Na4 Qf5 15.Bc4 ef3 16.Qf3 Qf3 17.Nf3 Rf3 18.d6 Kh7 19.dc7 Bd6–/+) 14...Qf7 (better 14...Nf1 15.Kf1 Bb4=+) 15.Bg2? Exerts pressure on the isolated pawn (15.Be2 Bb4 16.a3 Ne2 17.Qe2 Bc3 18.dc3 Qd5–/+) 15...Nf6 (better 15...Ne5! 16.Qb1 Nd3 17.Kd1 Bf5–+) 16.Nge2 Bg4 (better 16...Ng4 17.Rh3 Be3 18.de3 Ne3 19.Rg3 Nd1 20.Rd1 Qf6=+) 17.Ng3?? The pressure on the isolated pawn grows (better 17.Qc2 Ne2 18.Ne2 Be2 19.Ke2+=) 17...Bd1–+ 18.Rd1 Rae8 19.Nge4 Ne4 20.Ne4 b6 (20...Bd6 21.Rh3 Qf5 22.d3–+) 21.Ke2 (21.Rc1 Bd6 22.Nd6 cd6–+) 21...Qf5 (better 21...Qd7 22.Be5 Qb5 23.Ke1 Qb4 24.Nc5 bc5–+) 22.Ng3?? (better 22.Be5–+) 22...Qc2 (better 22...Qf4! 23.Be4 Qg4 24.Kd3 Qd1–+) 23.Be5 Qc4 24.d3 Qc2 (better 24...Qa4!? 25.d4 Qa2 26.Rd2 Qc4 27.Rd3–+) 25.Rd2 Qa4 (better 25...Qb1 26.Rh1 Qb5–+) 26.d4?? (better 26.Ne4 Qb5 27.Rb2–+) 26...Qb5 (26...Bb4 27.Nf1 Bd2 28.Nd2 Qb5 29.Ke1–+) 27.Kf3 (27.Rd3 Qc4 28.Be4 Qa2 29.Rd2 Qc4 30.Kd1 Qb3 31.Ke2–+) 27...Re5! 28.de5 Qc4 29.Rd4?? (better 29.Ne4 Bb4 30.Bh3 Bd2 31.Rd2–/+) 29...Qc2 (29...Bd4 30.ed4 Qd3 31.Kg4 Qd1 32.Bf3 h5 33.Nh5 gh5 34.Kg3 Qd4 35.Rf2 Rf4 36.e6–+) 30.Bf1 (30.Ne2–+) 30...Qb1 (better 30...Qh2 31.Re4 Be7–+) 31.Bd3 (31.Rd3!?–/+) 31...Bd4?? (better 31...Qd1 32.Be2 Qa1–+) 32.Ke4 (32.Ke4 Qg1 33.Re2 Be5 34.Kf3–+). FeegLood (2455) – GianFresco (2285), lichess.org, 2016.

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

4.Bb2 g6 5.Nf3 Bg7 6.c4 0-0 7.d4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.d4 a5 7.b5).

4.Ne2 e5=+ 5.Bb2 Bd6 6.Ng3 (6.f4 ef4 7.Nf4 0-0=) 6...0-0 7.c4 c6 (7...a4 8.d4 ed4 9.Qd4=+) 8.Be2 (8.cd5 Nd5 9.Nc3 Be6=+) 8...Re8 (8...dc4 9.Na3=+) 9.0-0 Nbd7 (9...dc4 10.Bc4 Bg4 11.f3=+) 10.a4 (10.d4 ed4 11.Qd4 Be5=) 10...Nb6 11.cd5 cd5 12.Nc3 (12.d4 e4=) 12...d4 (12...Be6 13.d4=+) 13.Nce4= de3 (13...Ne4!? 14.Ne4 Bb4=) 14.de3+= Bc7 (14...Ne4 15.Ne4 Bb8 16.Qd8 Rd8 17.Nc5+=) 15.Nf6 (15.Qd8 Rd8 16.Nf6 gf6+=) 15...Qf6+= 16.f4 (16.Qc2 Bb8+=) 16...Qg6 (16...Qh6 17.Kh1=) 17.f5 (17.Bh5 Qe6 18.Rc1 Rd8+–) 17...Qh6= 18.e4 Nd7 19.Bc1 (19.Kh1 Bb6+=) 19...Qb6 (19...Bb6 20.Kh1 Qh4 21.Qd2=) 20.Kh1+= Nf6 (20...Bd6 21.Bg5+=) 21.Qc2 Bd6 22.Bg5 Bb4 23.Nh5 Nh5 24.Bh5 h6 25.Qc4 Threatening mate: Qxf7 25...hg5?? (25...Rf8 26.Bh4+–) 26.Bf7 (better 26.Qf7 Kh7 27.f6+–) 26...Kh8?? (better 26...Kf8 27.Be8 Ke8 28.Qg8 Bf8+–) 27.Be8+– (27.Be8 Bf5 28.Rf5 Re8 29.Rd1+–) 1–0. aravind555 – Dikanakanturan (1670), lichess.org, 2020.

4.Nf3 e6 5.c4 Nbd7 6.Nc3 (6.d4 Bb4 7.Bd2 0-0=) 6...Bb4 (6...Nb6 7.cd5 ed5 8.Be2=) 7.Qc2 0-0 8.Be2 Nb6 9.cd5 ed5 10.0-0 Re8 11.Bb2 Qe7 12.Bd3 Ne4 13.Nd4 g6 (13...a4 14.f3 a3 15.fe4 (worse 15.Be4 ab2 16.Bh7 Kh8–/+) 15...ab2 16.Qb2 Bc3 17.Qc3=) 14.Be2 Nf6 15.f3 (15.Rac1 a4=) 15...a4 16.a3 Bd6 17.Nd1 Nfd7 (17...Bd7 18.f4=) 18.f4+= Nc5 19.Nf2 Ne4 20.Nf3 f6 21.Nd4 Bd7 22.g3 (22.f5 Bf5 23.Nf5 gf5=) 22...Qf7 23.Rac1 (23.Ne4 de4 24.f5 Qe7=) 23...Nf2 (23...Qf8 24.Ne4 de4 25.f5=) 24.Rf2+= Nc4 (24...Qe7 25.f5 g5 26.Re1+=) 25.Bc4+– dc4 26.Qc4 Qc4 27.Rc4 Ra5 28.Rc2 Kf7 29.Rf3 Bf5 30.Rc1 Be4 31.Rff1 Bd3 32.Rfd1 Re7 33.Kf2 Rd7 (worse 33...Bb5 34.Bc3 (worse 34.Nb5 Rb5 35.Rc2 Rb3=+) 34...c5 35.Nf5 gf5 36.Ba5+–) 34.g4 b6 35.h4 Bc5 36.Re1 (36.g5 fg5 37.hg5 Bd4 38.Bd4 Rb5+=) 36...Bd4= 37.Bd4 (worse 37.ed4 Rb5 38.Bc3 h5=+) 37...Bb5 (37...Rb5 38.Rc6=) 38.Bc3 Ra8 39.e4 Bd3 40.Re3 Re8 41.Rce1 Ree7 (41...h6 42.g5 hg5 43.hg5 fg5 44.fg5+=) 42.f5 ½–½. housemd (1960) – cachisss (1935), gameknot.com, 2015.

3.e3 g6

4.a4 Bg7 5.Bb2 0-0 6.Be2 d6 7.Nf3 e5 8.d3 Nbd7 9.c4 Re8 10.0-0 Qe7 11.Nbd2 Nc5 12.Qc2 (12.Re1 Nfd7 13.Ra2 Nb6=+) 12...Bg4 (12...Bf5 13.Nh4 Bd7 14.Rfe1=) 13.h3 (13.Rfe1 h6=) 13...Bc8 (13...Be6 14.Rfe1=) 14.Rfe1 e4 (14...h6 15.Rab1=) 15.de4 Nce4 (15...Nfe4 16.Ne4 Bb2 17.Qb2 Ne4 18.Nd2=) 16.Rad1 (16.Ne4 Ne4 17.Bg7 Kg7=) 16...Nd2 (16...Nc5 17.Bd3=) 17.Nd2+= Bf5 (17...Nd7 18.Bg7 Kg7 19.Nb3+=) 18.Qb3 (18.Qc3 Nh5 19.Qb3 Bb2 20.Qb2 Qf6+=) 18...Ne4 (18...Nd7 19.Bd4=) 19.Bg7+= Kg7 20.Bf3 (20.Ne4 Be4 21.b6+=) 20...Nd2 (better is 20...Nc5!? 21.Qa3 Qe5=) 21.Rd2+/– Be4 22.Be4 Qe4 23.Qc3 Qe5+= 24.Qe5 de5 25.Red1 Re7 26.Rd7 Rae8 27.e4 Kf6 28.c5 Ke6?? 29.c6 b6 30.R1d5 Rd7 31.Rd7 Re7 32.Rd5 f5 33.f3 fe4 34.fe4 Rf7 35.g3 h5 36.Kg2+= g5 37.Rd2 g4 38.hg4 hg4 39.Rd3 Rf6 40.Rd8 Rf7 41.Rg8 Kd6 42.Rg4 Kc5 43.Rg5 Kd4 44.Rf5+/– Rg7 45.Kf3 Re7 46.g4+– Kc5 47.g5 Kb4 48.g6 Rg7 49.Re5?? Ka4?? 50.Rg5+– Kb4 51.Kf4 a4 52.Kf5 a3 53.Kf6 (53...a2 54.Rg1+–) 1–0. kostovist (1640) – StephenHilton (1605), internet, 2006.

4.d4 d5 =.

4.Nf3 d5 =.

4.Bb2 Bg7

5.c4 0-0 6.d4 d6 7.Nf3 (--> 1.b4 a5 2.b5 Nf6 3.Bb2 d6 4.e3 g6 5.d4 Bg7 6.Nf3 0-0 7.c4).

5.c4 d6 6.Nf3 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 TESTJ400 5.e3 a5 6.b5 d6).

5.c4 d6 6.f4 0-0 7.Be2 Nbd7 8.Nf3 e5 9.fe5 Ng4 10.0-0 Nde5 11.Ne5 Ne5 12.d4 Nd7 13.Bf3 Rb8 14.Qa4 Qg5 15.Bc1 Nb6 16.Qb3 Be6 17.Na3 c6 18.Rb1 (18.Qc3!?=) 18...Nc4+= 19.Nc4 cb5 20.d5 bc4 21.Qc4 Rfc8 22.Qd3 Bg4 23.e4 Qh5 24.Bf4 Rc3 25.Bg4 Qg4 26.Qd2 Rbc8 27.Rbc1 Rc1 28.Rc1 Rc1 29.Qc1 Bd4 30.Kh1 h5 31.h3 Qd7 32.Qd2 Be5 33.Be5 de5 34.Qa5 f5 35.Qb6 Kf7 36.ef5 gf5 37.Qb3 Kf6 38.Qf3 e4 39.Qc3 Kg5 40.Qe5 Kg6 41.Kg1 e3 42.d6 Kf7 43.Qd5 Kf6 44.Kf1 Qf7 45.Qd4+/– Ke6 46.Ke2 f4?? 47.Qc4+– Kf6 48.Qf4 (48.Qf4 Ke6 49.Qf7 Kf7 50.Ke3+–) 1–0. Lehmann,Frank – Gauer,Jac (1970), ZDMI Open, Dresden GER, 2010.

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

5.Nf3 0-0 6.Be2 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 0-0 5.Be2 a5 6.b5).

4.Nf3 Bg7

5.Bb2 0-0 6.Be2 =.

5.Bb2 d6 6.a4 0-0 7.Be2 c5 8.c4 b6 (8...d5 9.0-0=) 9.d3 (9.0-0 Qc7=) 9...Bb7 (9...Nbd7 10.0-0=) 10.Nbd2 Nbd7 11.Qb3 (11.0-0 Qc7=) 11...e6 12.Rc1 Qe7 13.0-0 Rfe8 (13...Rae8 14.e4=) 14.Rfd1 e5 15.Ne1 (15.Ng5 Red8=) 15...Nf8 (15...Rad8 16.Bf3 Bf3 17.Nef3=) 16.Bf3+= Ne6 17.Bb7 Qb7 18.Nef3 Rad8 19.Qc2 Re7 20.Nb3 Nd7 21.Bc3 Qc7 22.Qd2 Ra8 23.Qe1 f5 24.h4 h6 25.Rc2 Nf6 26.Kf1 Ng4 27.Ke2? Nd4!–+ 28.Bd4 ed4 29.Kd2 de3 30.fe3 Rae8 31.e4 fe4 32.Qg3 ed3 33.Kd3 Ne3 34.Rcd2 Nd1 35.Rd1 Re3 (35...Re3 36.Kc2 Rc3 37.Kd2 Qf7–+) 0–1. Jamieson,Ian (2060) – Stevenson,James (2085), SCO–ch, 2005.

5.d4 0-0 =.

3.Nf3 b6

4.Ba3 A) 4...d5 5.e3 (5.d4 c6 6.e3 Bg4 7.h3 Bd7 8.Nc3+=) 5...Bg4 6.d4 Nbd7 7.c4 e5 8.Bf8+=; B) 4...g6 5.Bb2 (5.d4 Bg7 6.e3 d6 7.Bd3 c5 8.0-0=; 5.e3 Bg7 6.d4 d6 7.Bd3 0-0 8.0-0=) 5...Bb7 6.Bf6 ef6 7.e3 a4 8.Bc4+=; C) 4...c5 5.e3 (5.d4 cd4 6.Qd4 d5 7.e3 Nbd7 8.Bd3=; 5.bc6 Nc6 6.Nc3 Ba6 7.e4 Bf1 8.Rf1=; 5.Bb2 d5 6.e3 e6 7.Be2 Bd6 8.0-0=) 5...d6 6.d4 Nbd7 7.dc5 dc5 8.Bb2+=.

4.Bb2 Bb7 5.Nc3 (5.e3 e6 6.Be2 Be7 7.0-0 0-0 8.c4=; 5.a3 e6 6.e3 Be7 7.Be2 0-0 8.0-0=) 5...a4 6.a3 e6 7.e3 Be7 8.Be2 =.

4.Bb2 e6 5.c4 d5 6.e3 Bd6 7.Nc3 Bb7 (7...0-0 8.d4=) 8.Nd4 (8.cd5!? ed5 9.d4=) 8...0-0 9.Qf3 (9.cd5 Nd5 10.Nd5 Bd5= (< 10...ed5 11.Qc2+=)) 9...Re8 (9...Nbd7 10.cd5 Ne5 11.Qh3 ed5 12.f4=) 10.Qh3 (10.cd5 Nd5 11.Bc4 Be5 12.Nd5 ed5=) 10...c5 11.bc6 Nc6 12.Ncb5 (12.Nc6 Bc6 13.Rc1 dc4 14.Bc4 a4=+) 12...Nd4 13.Nd4 Rc8 14.cd5 Bd5 (14...e5 15.Nc6 Bc6 16.dc6=) 15.Be2 (15.Ba6 Rc7=+) 15...Qe7 (15...e5 16.Nf5–/+) 16.a3 Qb7 (16...Ne4 17.f3 Ng5 18.Qh5=+) 17.0-0= Be7 (17...Red8 18.Nb5 Be7 19.Rfc1=) 18.f4 (18.Rfc1 Rc5=) 18...Nd7 (18...Ne4 19.Rad1=) 19.d3 f5 (19...b5 20.e4 Qb6 21.ed5=) 20.Bh5 (20.Rab1 Bf6+=) 20...Rf8 (20...Red8 21.Qg3 Nf6 22.Bf3 Bf3 23.Rf3= (< 23.Nf3 Rd3 24.Bd4 Ng4–/+; < 23.Qf3 Qf3 24.Rf3 Kf7=+)) 21.e4+= fe4 22.Ne6 Bc5 23.d4+= Rf6 24.dc5 Re6=+ 25.Bg4 Rh6 26.Qg3+= Rg6 27.f5 Rh6? 28.f6!+– Rg6 29.Qh3 Bf7? 30.Bd7 Rc5 31.Bf5 Rf5 32.Qf5 e3 33.g3 e2 34.Rf2 Qc7 35.Rc1 Qc1= 36.Bc1 e1Q 37.Rf1 Qe8 38.Bb2 gf6= 39.Qf2 Bd5 40.Qb6 Qe4 41.Kf2 Rh6 42.h4 Bc6 43.Qb8 Kg7 44.Rc1 Qf3 45.Ke1 Qe3 46.Kf1 ½–½. Berger – Fritz,Harry, corr, 1966.

4.Nc3 d5 5.Ba3 d4 6.Na4 e5 7.Bf8 Rf8 8.e3 =.

4.d4 Bb7 5.Nc3 e6 6.Bb2 Bb4 7.a3 Bc3 8.Bc3 Ne4 9.Bb2 0-0 10.e3 c6 11.bc6 dc6 12.Bd3 c5 13.dc5 Nc5 14.0-0 Nc6 15.Qe2 Na4 16.Rab1 Qe7 17.Ba1 Qa3 18.Ng5 h6 19.Nh7 Rfd8 20.Qg4 Nc3 21.Nf6 Kh8? (21...Kf8 22.Rb3 Qb3 23.cb3 Rd3 24.Nh5+/–) 22.Rb6 (better is 22.Nh5 Rg8 23.Rb3+– (23.Rb6?! Ne5 24.Qd4 Nd3 25.Qd3 Bg2 26.Kg2 Qc5+/–)) 22...Ne5+/– 23.Qh5 Nd3 24.Rb7 Ne2 25.Qe2 Nc1 26.Qh5 Qa1 27.Rf7 Ne2 28.Qe2 Qe5 29.Qg4 Qg5 30.Qg5 hg5 31.Nh5 Rg8 32.Rd1 a4 33.c4 (33.Rb7!? a3 34.Ra1 Rgc8+–) 33...a3 34.f4 a2 35.Ra1 Rgc8 (35...Kh7 36.Rb7 (36.fg5?! Kg6 37.Rg7 Rg7 38.Ng7 Kg7+–) 36...Kh6 37.g4+–) 36.Ng7 (better is 36.fg5 Rcb8+–) 36...Rcb8 37.Kf2 (better is 37.fg5!? Kg8 38.Rf2 Rb1 39.Rf1 Ra1 40.Ra1 Kg7+–) 37...Rb1 38.Ra2 (38.fg5? Ra1 39.Nh5 Rf1 40.Kf1 a1Q 41.Kf2 Ra2 42.Kg3 Qe1 43.Kh3 Qe3 44.Rf3 Qe2 45.Rf8 Kh7–+; < 38.Ne6 Ra1 39.Nc7 Rc1 40.Na8 a1Q–+) 38...Ra2 39.Kf3 gf4 40.ef4 (40.Ne6 fe3 41.Rf8 Kh7 42.Rf7 Kg6–/+) 40...Rb3 41.Ke4 Rg2 42.Ne6 Rh2 43.Rf8 (43.c5 Re2 44.Kf5 Rb5+–) 43...Kh7 44.c5 Rb4 45.Ke5 Kg6?! (45...Ra4+–) 46.f5 Kh7 47.c6 Rb5 (47...Rc2 48.c7 Rbc4+–) 48.Kf6 Rb7 (48...Rh6 49.Ke7 Rh1+–) 49.Ng5 (49...Kh6 50.Rh8 Rh7 51.Rh7) 1–0. Gross,Gerald – Wartig,Wolfgang, email SOK–99–134, 1999.

4.d4 e6 5.e3 c6 6.c4 d5 7.cd5 ed5 8.bc6 =.

4.e3 e6 5.d4 (5.Be2 Be7 6.0-0 0-0 7.Bb2 Bb7 8.Nc3=; 5.Bb2 Bb7 6.Be2 Be7 7.0-0 0-0 8.Nc3=) 5...Be7 6.Bd3 Bb7 7.0-0 0-0 8.Nbd2 +=.

4.e3 g6 5.Bb2 (5.d4 Bg7 6.Be2 0-0 7.0-0 c6 8.c4+=; 5.c4 Bg7 6.d4 c5 7.Be2 cd4 8.Nd4=) 5...Bg7 6.c4 (6.Be2 0-0 7.d4 c6 8.c4=) 6...0-0 (6...c6 7.Be2 cb5 8.cb5+=) 7.Bf6 (7.d4 c6+= 8.Nc3+=) 7...Bf6= 8.d4 c5 9.Nc3 d6 (9...Bb7 10.Be2=) 10.Rc1 Bg4 11.Be2 Nd7 12.0-0 Re8 (12...Rc8 13.Ne4=) 13.h3+= Bf3 14.Bf3 Rc8 15.Bc6 Rf8 (15...Bg7!?+=) 16.Nd5+/– Bg7? (better is 16...Rb8+/–) 17.Bd7+– Qd7 18.Nb6 Qf5 19.Nc8 Rc8 20.dc5 (20.d5 Rb8+–) 20...Rc5 (20...Qc5 21.Qd5 Qb6 22.Rfd1+–) 21.Qa4 g5 (21...Bb2 22.Rc2 Ba3 23.b6+– (23.Qa3?! Qc2 24.Rc1 Qe4+/–)) 22.g4 (better is 22.Qa5 Qc8 23.a4+–) 22...Qf3 23.Rfd1?? (better is 23.Qa5 Bf6 24.a4+–) 23...Qh3+= 24.b6?? Qg4?? 25.Kf1+/– Qh3 26.Ke2 g4? 27.Qe8+– Bf8 28.Rd4 Qf3= 29.Ke1 Rf5 30.Rc2?? g3–+ 31.Rg4 Qg4 32.b7 g2 33.b8Q g1Q 34.Kd2 Q1d1 35.Kc3–+ Qg7 36.Kb3 Qb1 37.Ka3 Qc2 38.Qc6 (38.Qf8 Qf8 39.Qb2 Qb2 40.Kb2 Rf2 41.Kc3 Qg7 42.Kd3 Qg6 43.e4 Qg3 44.Kd4 Rd2) 0–1. babyl – McGhee, ChessWorld.net, 2008.

4.g3 Bb7 5.Bg2 c5 6.bc6 Nc6 7.Bb2 d5 8.d4 (8.Bf6 ef6 9.0-0 Be7=) 8...e6=+ 9.0-0 Bd6 10.Nbd2 Ba6 (10...b5 11.a4 b4 12.Rc1=+) 11.Re1 0-0 12.e4 de4 13.Ne4 (13.Ne5 Bb7=) 13...Ne4=+ 14.Re4 Ne7 15.Re1 Rc8 16.c3 Nd5 17.Qd2 Bc4 18.Ne5 Be5 19.Re5 Ne7 (19...Qc7 20.a4=+) 20.f4 Ng6 21.Ree1 Bd5 22.Bh3 Rc6 23.f5 ef5 24.Bf5 Rf6 25.Bh3 (25.Bd3 Qc8 26.Re3 Bc4=) 25...b5 (25...Nh4 26.Bg4=+) 26.a4 ba4 27.Ra4 (27.Qe2 Nh4 28.Bg4 Bf3–+) 27...Bb3 (better 27...Nh4! 28.gh4 Rg6 29.Kf1 Qh4–/+) 28.Raa1= Qb6 29.Ba3 0–1. Musa,Abdul Khalid – Hamzah,Baharuddin (1795), Festival Catur Kelantan, 2019. (=1.Nf3 Nf6 2.b4 a5 3.b5 b6)

4.e3 Bb7

5.Ba3 c5 6.d4 cd4 7.ed4 d6 8.c4 +=.

5.Bb2 e6 6.c4 Be7 7.Be2 0-0 8.0-0 d6 9.d4 Nbd7 10.Nbd2 Ne4 11.Qc2 f5 12.Bd3 Nd2 13.Nd2 Qe8 14.e4 Qg6 15.f3 Bg5 16.ef5 ef5 17.Rae1 Qh6 18.Re2 Be3 19.Kh1 Bf4 20.h3 Qh4 21.Rg1 Nf6 22.Nf1 Nh5 23.Bc1 g6 24.d5 Rae8 25.Bf4 Qf4 26.Qd1 Bc8 27.Rf2 Re7 28.g3 Qd4 29.Rd2 Qc5 30.Qc2 Re1 31.g4 Nf4 32.Bf5 Nh3 33.Rdg2 Ng1 34.Rg1 Bf5 35.gf5 Rf5 36.Qd2 Rh5 37.Kg2 Rhe5 38.Qd3 Rg5 0–1. Luneau – Schichtel, Wildbad 1993.

5.d4 e6 6.Bd3 Bb4 7.c3 Be7 8.0-0 +=.

3.Nf3 c5

4.Bb2 d5 5.c4 d4 (5...e6 6.e3=) 6.e3 de3 7.fe3 e6 (7...Nbd7 8.Be2=) 8.Be2 Be7 (8...Bd6 9.0-0=) 9.0-0+= Nbd7 10.Nc3 b6 11.Qe1 Qc7 12.Rd1 (12.d4 Bb7 13.Bd3 Rd8+=) 12...Bb7 13.Qh4 h6 14.Qh3 0-0-0 (14...Rd8 15.d4+=) 15.Na4 (15.d4 g5 16.Ne5 cd4 17.Nf7 dc3 18.Bc3 g4 19.Bg4 Ng4 20.Nd8 Rd8 21.Qg4 e5+=) 15...g5= 16.Ne1 h5 17.d3 Kb8 (17...g4 18.Qh4=) 18.e4 (18.Nc2 Rhg8=) 18...Ka7 (18...g4 19.Qe3 e5 20.Nc3=) 19.Qe3+= Bd6 (19...Rh7!?+=) 20.Rf6 (20.e5 Ne5 21.Rf6 Ng4 22.Bg4 Bh2 23.Kf1 hg4 24.Qg5 Rdg8+=) 20...Nf6 (20...Bh2!? 21.Kh1 Bf4+/–) 21.Bf6 Be5 (21...Bh2 22.Kh1 Bf4 23.Qf2+/–) 22.Be5 (22.Bh8 Bh2 23.Kh1 Rh8+–) 22...Qe5 23.Nf3 Qf4 24.Qf4 gf4 25.Ne5 Rh7 26.Nc3 (26.Rf1 f6 27.Nc6 Bc6 28.bc6 e5+–) 26...Rg8 (26...f6 27.Nc6 Bc6 28.bc6+–) 27.Rf1 (27.Nd7 Rd8 28.Nf6 Rh6 29.Nh5 e5+–) 27...Rhg7 28.Rf2 f6 (28...h4 29.Kf1 h3 30.Rf4 hg2 31.Kg1+–) 29.Nc6 Bc6 30.bc6 h4 31.h3 Rg3 (31...Kb8 32.Bg4 Rg4 33.hg4 Rg4 34.Kh2+–) 32.Bg4 f5 (32...R8g4 33.hg4 Rg4+–) 33.ef5 ef5 (33...Rd3 34.Nb5 Ka6 35.fe6+–) 34.Nb5 Kb8 35.c7 (35.c7 Kb7 36.Bf5+–) 1–0. Orso – Kunszt, Vasas–Honved, 1993. (=1.Nf3 Nf6 2.b4 a5 3.b5 c5)

4.d3 d5 5.Nbd2 g6 (5...Bf5 6.c4=) 6.Bb2 (6.e4 Bg7 7.Rb1 0-0=) 6...Bg7 7.e3 a4 8.c4 0-0 9.Be2 Qa5 (9...a3 10.Bc3=) 10.Qc2 dc4 (10...a3 11.Bc3 Qa4 12.Qa4 Ra4 13.cd5 Nd5 14.Bg7 Kg7 15.Bd1=) 11.dc4 (11.Qc4 Be6 12.Qc5 Rc8=) 11...Bf5 12.Qc1 Nbd7 13.0-0 Rfd8 14.Bc3 Qc7 15.h3 h6 (15...e5 16.Nh4=) 16.Nh4 Be6 17.f4 (17.Rd1 g5 18.Nhf3 g4 19.hg4 Bg4=) 17...Ne8 (17...Nf8 18.Qc2=) 18.e4 White prepares the advance f5 18...g5 (18...Ndf6 19.Qc2+=) 19.f5 (19.fg5 Bc3 20.Qc3 Qe5 21.Qe5 Ne5+=) 19...gh4 (19...Bc4 20.Nc4 (worse 20.Bc4 gh4 21.Bg7 Kg7=) 20...gh4 21.Bg7 Kg7 22.Rf4+=) 20.fe6+= fe6 21.Bg4 (21.Bg7 Kg7 22.Nf3 Nef6=) 21...Qb6 (21...Nf8 22.Bg7 Kg7 23.Qb2 Nf6 24.Rad1+=) 22.Bg7 Ng7 23.Nf3 (23.Be2+=) 23...e5 (23...h5 24.Bh5 Nh5+=) 24.Nh4 (24.Qe3 Nf8 25.Ne5 h5+–) 24...Qd6 25.Qa3 (25.Bd7!? Rd7 26.Nf3+–) 25...Qd4+= 26.Kh2 Nf6 (26...Qe4 27.Qg3 Nf6 28.Bf3+–) 27.Qg3 Qc4 28.Be2 (28.Nf5 Nf5 29.Bf5 Kf8+–) 28...Qe2= 29.Nf5 Ng4 30.hg4 (30.Qg4 Qg4 31.Nh6 Kh7 32.Ng4 Rd4+–) 30...Nf5= (30...Qe4 31.Rae1 Qd3 32.Nh6 Kh8 33.Nf7 Kg8 34.Nd8 Rd8 35.Qd3 Rd3 36.Re5+–) 31.gf5 Kf8 32.Qg6 Rd6 33.f6 Rf6 34.Rf6 ef6 35.Qf6 Kg8 36.Qg6 Kf8 37.Rc1 (37.Qh6 Ke7 38.Qg5 Kd7 39.Qf5 Kc7 40.Qe5 Kb6 41.Qd6 Ka5 42.Qc5 Qe4+=) 37...Qf2 (37...Qa2 38.Rf1 Ke7 39.Qg7 Kd6 40.Rd1 Ke6 41.Qd7 Kf6 42.Rd6 Qe6 43.Qe6 Kg7 44.Rd7 Kh8 45.Qe5 Kg8 46.Qg7) 38.Rc3 (38.Qh6 Ke7 39.Qg7 Qf7 40.Qe5 Qe6 41.Qg7 Qf7 42.Qf7 Kf7 43.Rc5 Ke6+–) 38...Qh4+– (38...Qa2 39.Rf3 Ke7 40.Qg7 Kd6 41.Rd3 Ke6 42.Qd7 Kf6 43.Rf3 Kg6 44.Rg3 Kf6 45.Qg7 Ke6 46.Rg6) 39.Rh3 Qf4 40.Rg3 Rd8? (better 40...Ke7 41.Qg7 Kd6+–) 41.Kh3 Ke7 42.Rf3 Qf3 43.gf3 1–0. michaelbuss (2865) – PeterRs (2530), ChessWorld.net, 2017.

4.d4 cd4 5.Qd4 d6 6.g3 (6.e4!?+=) 6...e5 7.Qb2 Be6 8.Bg2 Nbd7 9.Ng5 d5 10.c4 Rc8 11.Ne6 fe6 12.cd5 Bc5 13.Bd2 ed5 14.0-0 0-0 15.Nc3 Nb6 16.Qb3 Qd7 17.Bg5 Bd4 18.Rac1 Kh8 (18...Bc3 19.Rc3 a4+=) 19.Bf6 Rf6 20.e3 (20.Nd5 Rc1 21.Rc1 Rf2= (worse is 21...Bf2 22.Kh1 Rf8 23.Rc7+/–)) 20...Bc3 21.Rc3 Rcf8 22.f4 d4 23.Rd3 a4 24.Qb4 Qf7 25.Qc5 (25.ed4!? ef4 26.Rdf3=) 25...de3= (worse is 25...ef4 A) worse is 26.Qd4 f3–/+ (worse is 26...Qa2 27.ef4 Qf7 28.Rfd1=); B) worse is 26.ed4 Rc8 27.Qa3 fg3 28.Rg3 Rf1 29.Bf1 Qd7=; C) 26.ef4?! Re8+/–; D) 26.Rf4 de3 27.Qb6+=) 26.Qe3 ef4 27.Rf4 Rf4 (27...Qa2?? 28.Rf6 gf6 29.Qb6 Qa1 30.Bf1+–) 28.Qf4 Qe7 (worse is 28...Qf4 29.gf4 g6 30.Rd6+/–) 29.Re3 Qc5 30.Qe5 Qc2 31.Rf3 (31.Bb7?? Qf2 32.Kh1 Qf1) 31...Nd7 32.Rf8 Nf8 33.h4 Qa2 34.Qe7 Qg8 35.b6 g5 36.Qb7 a3? (36...gh4 37.Qf3 Nd7 38.Qc3 Qg7 39.Qc8 Nf8+/–) 37.Qa8+– a2 (37...gh4 38.Qa3 Qg7 39.g4 Qd4 40.Kh1+–) 38.b7 Nd7 39.Bd5 Qb8 40.hg5 Kg7 41.Kh2 (41.Qa2?! Qg3 42.Qg2 Qg2 43.Kg2 Kg6+–; 41.Ba2?! Qg3 42.Kf1 Nb8+–) 41...h6 (41...Qf8 42.Qa2 (42.Ba2?! Qf2 43.Kh3 Qf1 44.Kh4 Qh1 45.Kg4 Qe4 46.Kh5 Qf3 47.Kh4 Qh1 48.Kg4 Qe4 49.Kh3 Qh1 50.Kg4=) 42...Nb8 43.Qb2 Kg6 44.Qe5+–) 42.Qa2 (42.Ba2 hg5 43.Be6 Qe5 44.Qg8 Kh6+–) 42...hg5 43.Qb2 Kh6 44.Be4 Qf8 45.Qd4 Qe8 46.Kg2 g4 47.Qd2 Kg7 48.Bc6 1–0. marekt – PeterRs, ChessWorld.net, 2016.

4.d4 d5 5.dc5 e6 6.e3 (6.Ba3 Nbd7=) 6...Bc5 7.Bb2 Nbd7 8.Nbd2 0-0 9.a4 (9.c4 Qe7=) 9...b6 (9...Qe7 10.c4=) 10.g3 (10.Be2 Bb7=) 10...Bb7 11.Bg2 Qc7 (11...Rc8 12.0-0+=) 12.0-0 Rac8 13.Rc1 Rfd8 14.c4 dc4 (14...e5 15.cd5 Bd5 16.Nb3=) 15.Qc2 (15.Nc4 h6=) 15...Nd5 (15...Bd5 16.e4 (worse is 16.Nc4 Bb4 17.Na3 Qc2 18.Rc2 Nc5–/+) 16...Ba8 17.Qc4=) 16.Ng5 (16.Nc4 N5f6=) 16...N7f6 (16...Nf8 17.Nc4 Nb4 18.Qe2+=) 17.Bd5= ed5 18.Bf6 gf6 19.Qh7 Kf8 20.Nh3 (20.Ngf3 Ke7+=) 20...Ke7 (20...Ke8 21.Rfd1=) 21.Nf4+= Rg8 (21...Ba3 22.Rc2+=) 22.Nf3 Bd6 (22...Ba3 23.Rcd1 Rgd8 24.Nd4+–) 23.Nd4+/– Bf4? (23...Rge8 24.Rfd1 Bf4 25.ef4+/– (25.gf4?! Rh8 26.Qc2 Rcg8 27.Kh1 Qd7=)) 24.ef4?? (better is 24.Nf5 Ke6 25.ef4 Qf4 26.Nh6+–) 24...Rcf8 (24...Rce8 25.Rfe1 Kd8 26.Qh4+/–) 25.Rfe1 (25.Nf5 Kd8+/–) 25...Kd8 26.Qf5 Qd6 (26...Re8 27.Qf6 Kc8 28.Nf5+/–) 27.Nc6 (27.Red1!? Kc7 28.Nc6+–) 27...Bc6+/– 28.bc6 Kc7 29.Red1 Rd8 30.Rc4 dc4 (30...Qe6!? 31.Qe6 fe6+=) 31.Rd6 Rd6 32.Qh7 Rf8 33.Qg7 Rc8 34.Qf7 Kc6 (34...Kd8 35.Qg8 Kc7 36.Qc4+–) 35.Qc4 Kb7 (35...Kd7 36.Qf7 Kd8 37.g4+–) 36.Qe4 Rcc6 (36...Kc7 37.h4+–) 37.h4 (37.h4 Re6 38.Qh7 Rc7 39.Qf5 Rc1 40.Kg2+–) 1–0. Ivanets,Vladimir – Kostic,Filip, Moscow, 1996. (=1.Nf3 Nf6 2.b4 a5 3.b5 c5)

4.e3 d5 =.

4.c4 d6

5.g3 Be6 6.Qc2 =.

5.g3 Bg4 6.Bg2 Qc8 7.h3+= Be6 8.d3 h6 9.Bb2 g5 10.Nbd2 Nbd7 11.Ne4 Bg7 12.h4 g4 13.Nfd2 Ne5 14.Nc3 Nh5 (14...Bf5 15.0-0=). Serebrisky,AS – Savchenko, corr Soviet Union, 1988.

5.g3 Bg4 6.Bg2 g6 7.h3 Be6 8.Ng5 Bc4 9.Nc3 Bg7 10.d3 Be6 11.Bb7 Ra7 12.Bf3 Bd7 13.Rb1 0-0 14.Bd2 h6 15.Nge4 Ne4 16.Be4 d5? (16...Be6!?+=) 17.Nd5 Be6 18.b6 Rd7 19.Ne3 White plans b7 19...Ba2 20.Rb5 Rd6 21.b7 Rb6+/– 22.Ba5 (22.Ba5 Bc3 23.Bc3 Rb5 24.Qa4 Rb1 25.Kd2 Rh1 26.Bh1+=) 1–0. michaelbuss – PeterRs, ChessWorld.net, 2009.

4.d4 e6

5.Ba3 b6 6.Nbd2 Bb7 7.e3 Qc7 8.Be2 Nd5 9.c4 Nc3 10.Qb3 Ne2 11.Ke2 d6 12.dc5 dc5 13.Bb2 Nd7 14.Rad1 f6 15.Qd3 0-0-0 16.Ne4 e5 17.Nd6 Bd6 18.Qd6 Rhe8 19.Nh4 Nf8 20.Qc7 Kc7 21.f3 Ne6 22.Nf5 Rf8 23.h4 Rf7 24.Rd8 Nd8 25.Rd1 g6 26.Nh6+/– Rf8? 27.Ng4+– e4 28.Nf6 ef3 29.gf3 h6 30.Be5 Kc8 31.e4 Nf7 32.Nd7 Ne5 33.Nf8 Nc4 34.Ng6 Na3 35.Ne7 Kc7 36.Nd5 Bd5 37.Rd5 Nb5 38.Rh5 Nd4? 39.Ke3 Nc2 40.Kd2 Nd4 41.f4 c4 42.Rh6 b5 43.Ra6 Nf3 44.Kc3 Nh4 45.Ra5 Kb6 46.Kb4 Ng2 47.Rb5 Ka6 48.f5 Ne3 49.Rc5 1–0. Stojanovski,Zdravko – Vucelic,R (1990), ch–Subotica Open, 2011. (=1.Nf3 Nf6 2.b4 a5 3.b5)

5.e3 =.

3.Nf3 c6

4.a4 d5 5.Bb2 Bg4 6.e3 Nbd7 7.d4 (7.h3 Bf3 8.gf3 e6=) 7...e6+= 8.Be2 Bb4 9.c3 Bd6 10.0-0 0-0 11.c4 dc4 12.bc6 bc6 13.Ne5 (13.Nbd2 Nb6=) 13...Be2 14.Qe2 Qc7 (14...Be5!? 15.de5 Nd5+=) 15.f4= Nb6 16.Nd2 Bb4 (16...Be5 17.fe5 Nfd5 18.Ba3+=) 17.Ndc4+= Nc4 18.Qc4 Attacking the isolated pawn on c6 18...c5 19.f5 Nd5 20.fe6 fe6 21.e4 cd4 22.ed5 Qe5= 23.de6 Rf1 24.Rf1+= Bd6 25.g3 Bc5 26.e7 Kh8 27.Rf8 Rf8 28.ef8Q Bf8 29.Bd4 Qe1 30.Kg2 Qe4 ½–½. De Francesco,K (2345) – Markl,M (2195), 12th OIBM, Bad Wiessee GER, 2008. (=1.Nf3 Nf6 2.b4 a5 3.b5)

4.Nc3 d5 5.d4 Ne4 6.Ne4 de4 7.Ng5 Bf5 8.e3 e5 9.h4 (9.de5 Qe7 Double attack (9...Qg5 Discovered attack; 9...Qe7 Decoy)) 9...h6 10.Nh3 ed4 11.Qd4 Bb4 12.Bd2 Bd2 13.Kd2 0-0 14.Nf4 Qe7 15.Kc1 Rd8 16.Qc3 Nd7 17.bc6 bc6 18.Be2 (18.Qc6 Qa3 19.Kd1 Ne5 20.Qd5 Bg4 21.f3 ef3–+) 18...Nc5 19.a4 Ne6 20.g4 Nf4 21.ef4 Bh7 22.Rb1 Qd6 23.Qe3 Qd4 24.c4 Qd6 25.Rd1 Qe7 26.h5 Rdb8–/+ 27.Kd2 Rb4 28.f5 Ra4 29.Ke1 Rb4 30.Ra1 f6 31.Rd4+= Qe5 32.Rad1 Re8–/+ 33.Rd7 Qb8 34.Qa7= Qa7 35.Ra7 Kf8 36.Rdd7 Bg8 Attacks the isolani on c4 37.Rg7 e3 38.fe3+= Re3 39.Kd2 Re8 40.Bd3 Rd8 41.Kc3 Ra4 42.Rgd7 Ra3 43.Kd2 Ra2 44.Ke3 Rd7 45.Rd7 a4 46.Rc7 a3 47.Rc6 Ke7 48.Rc7 Kd6 49.Rg7 Ra1 50.Kd4 a2 51.Ra7?? Bc4+= 52.Bc4 Rd1 53.Ke4 a1Q 54.Ra1 Ra1 0–1. Mechkarov,Stefan – Minev,Nikolay N, BUL–ch, 1953. (=1.Nf3 Nf6 2.b4 a5 3.b5)

4.e3 cb5

5.Bb5 Nc6 6.Bb2 Qb6 (6...e6 7.c4+=) 7.a4+= e6 8.Bf6 gf6 9.0-0 Be7 10.d4 d5 11.Nbd2 Bd7 12.c4 Nb4 13.Bd7 Kd7 14.Rb1 Qc6 15.cd5 Qd5 16.e4 Qh5?? (Better is 16...Qa2+/–) 17.Ne5!!+– (17…Qe5 18.de5 fe5 19.Qh5+–) 1–0. b4_player (2235) – salvati (1760), GameColony.com, 2003.

5.Bb5 Qb6 6.a4 Nc6 7.d4 d5 8.Nbd2 Bd7 9.c4 dc4 10.Nc4 Qa7 (10...Qd8!?+=) 11.Ba3+– 0-0-0? (better 11...Nd5+–) 12.Bc5+– Qb8 13.Nb6 (13.Rc1 e6+–) 13...Kc7 14.Ne5?? (better 14.Nd7 Nd7 15.Bc6 bc6 16.Rb1+–) 14...Ne5+= 15.de5 Bb5 16.Qb3 Nd5?? (better 16...Bc6 17.ef6 gf6+=) 17.Nd5 (17.Qb5 Nc3 18.Qc4 Qc8 19.Nc8 Rc8 20.Qc3 Kb8 21.Qa5 Rc5 22.Qc5 e6+–) 17...Rd5 18.Qb5 Qa8 (18...b6 19.Bb6! Qb6 20.Rc1 Kb7 21.Qd5 Kb8+–) 19.Bb6 Kc8 (19...Kb8 20.Qe8 Rd8 21.Qd8) 20.Rc1 (20.Qe8 Rd8 21.Qd8) 20...Kb8 21.Qd5 (21.Qd5 e6 22.Qd8; 21.Qe8 Rd8 22.Qd8) 1–0. OnlyPolishOpening (1735) – Eric_Saldana, lichess.org, 2020.

4.e3 d5

5.Bb2 Nbd7 6.c4 e6 7.a3 Bd6 8.d4 cb5 9.c5 Bc7 10.Bb5 0-0 11.Nc3 Qe7 12.0-0 Rd8 13.Qc2 e5 14.Bd7 Rd7 15.Ne5 Be5 16.de5 Qe5 17.Na4 1–0. Perea Montero – Serrano Sanchez, corr Spain 1988.

5.Nc3 e6 +=.

5.Be2 g6= 6.Bb2 Bg7 7.0-0 0-0 8.d4 (8.Nc3 cb5 9.Nb5 Nc6=) 8...Nbd7 (8...cb5 9.Bb5 Nc6 10.Nc3=) 9.c4 Re8 (9...cb5 10.cb5 Ne4 11.a4=) 10.c5 (10.Nbd2 c5+=) 10...Qc7 (10...Ne4 11.Qc1=) 11.b6+= Qb8 (11...Qd8 12.Qc2+=) 12.Nbd2 Ne4 (better is 12...e5+=) 13.a4?? (better is 13.Ne4 de4 14.Ng5+/–) 13...Ndc5!–/+ 14.Ne4 (14.dc5 Bb2 Pinning (14...Bb2 Deflection)) 14...Ne4 (14...de4?! 15.Ng5 h6 16.Nf7=) 15.Ne5 Nd6 16.Rc1 Be6 17.f4 Qd8 18.Qb3–/+ Nc8 19.Rc5 Qb6–+ 20.Qc3 Nd6 21.Bd3 f6 22.Nf3 Ne4 23.Be4 de4 24.Nd2 Bd5 25.Rb1 Qa6 26.Nc4?! Bc4 27.Rc4 e5?? 28.Qb3 Kh8 29.Ba3?? ef4–+ 30.ef4 f5 31.Bd6? b5! 32.Rc2 Bd4 33.Kh1 ba4 34.Qa4 Qd3 35.Rcc1 e3 36.Qc6 Rac8! 37.Qd5 Rc1 38.Rc1 e2 39.Be5+– Re5 40.Qd8 Re8 41.Qe8 Kg7 42.Qe7 (42.Qe7 Kh6 43.Qg5 Kg7 44.Rc7 Kg8 45.Qd8) 1–0. pumpkin (2300) – higarra (2365), net–chess.com, 2009. (=1.Nf3 Nf6 2.b4 a5 3.b5 c6)

3.Nf3 d5

4.a4 Nbd7 5.Ba3=+.

4.Bb2 Bf5 5.d3 (5.e3 e6=) 5...c6 6.Nbd2 cb5 7.g3 (7.e4 de4 8.de4 Ne4 9.Bb5 Nc6=+) 7...Nc6–/+ 8.Bg2 e6 9.Ne5 (9.0-0 Rc8–/+) 9...Ne5 10.Be5 Rc8 11.0-0 Bd6 12.d4 (better 12.Bf6!? Qf6 13.e4 de4 14.de4–/+) 12…Bc2–+ (12...Bc2 13.Qc1 Ba4 14.Bd6 Rc1 15.Rac1 b4–+; 12...Rc2?! 13.Bd6 Qd6 14.e4 Rd2 15.Qd2 Ne4 16.Qa5=) 0–1. alaskanbruin – PeterRs, ChessWorld.net, 2020.

4.c4 dc4 5.e3 Nbd7 6.Bc4 Nb6 7.Be2 g6 8.0-0 Bg7 9.Bb2 0-0 10.a4 Nfd5 (10...Be6 11.Nd4=) 11.Bg7 Kg7 12.Qc2 f6 13.d4 Bf5 14.Qb3 Qd6 15.Nbd2 e5 (15...Qb4 16.Rfc1 Rac8 17.Bd1+=) 16.Rfc1 Rae8 (16...Qb4 17.de5 fe5 18.Bc4 Qb3 19.Bb3+–) 17.de5 fe5 18.e4 Nf4 19.Bf1 Bg4 20.Qc3 Re7 21.h3 Bf3 22.Nf3 Nc8 23.Ra3 (worse 23.Qa5 Nh3 24.gh3 Rf3=+) 23...Nb6 24.g3 Nh5 25.Kg2 Nf6 26.Bd3 Ra8 27.Raa1 Ra7 28.Rd1 h6 29.Bc2 Qb4 30.Qb4 ab4 31.Rdb1 b3 32.Bb3 Ne4 33.a5 Nc5 34.Nd2 Nc8 35.Nc4 e4 36.Ne3 Rd7 37.Bd5 Ne7 38.Bc4 Nf5 39.Ra2 Ne3 40.fe3 Nd3 41.g4 Ne5 42.Be2 Nd3 43.a6 (43.Ra4 Re7+=) 43...ba6= 44.Ra6 Rb7 45.Ra4 Nc5 46.Rc4 Rd2 47.Kf1 Rd5 48.Kg2 Rd2 ½–½. sasikumar – pcmvr, net–chess.com, 2019.

4.c4 e5 5.Ne5 Bd6 (5...Nbd7 6.Nd7 Qd7 7.e3=) 6.Bb2+= Qe7 7.Nf3 Bg4 (7...0-0!?=) 8.cd5+/– 0-0 9.Nc3 a4 (9...Nbd7 10.e3+/–) 10.a3 (10.h3 Bf3 11.gf3 a3+/–) 10...Nbd7 11.e3 Nb6 12.h3 Bf5 13.Nh4 Bd7 14.Qc2 (14.Bd3 A) 14...Nbd5? 15.Nd5 (15.Na4?! Nf4 16.Bf1 Rfe8=) 15...Nd5 16.Qh5+–; B) 14...g6 15.Qc2 Nbd5+/–) 14...Nfd5 (14...g6 15.Bd3+/–) 15.Nd5+/– Qh4 (15...Nd5 16.Nf5 Qg5 17.Bd3+–) 16.Nb6 (16.Qc3 Qh6 17.Nb6 cb6+/–) 16...cb6 17.Qc3 Qh6 18.Qd4 Rfd8 19.Qb6 Qg6 20.Qb7 Rab8 21.Qd5 (21.Qa6 Ra8 22.Qb6 Rdb8+/–) 21...Bb5 22.Bb5 Ba3 23.Qa2 Rb5 1–0. bla_ner (1915) – manijer_wmp3 (2160), gameknot.com, 2015.

4.c4 g6 5.Nc3 =.

4.d4 Bg4 5.Ne5 Bh5 6.g3 e6 7.Bg2 c5 8.bc6 Nc6 9.Nc6 bc6 10.0-0 Bd6 11.c4 0-0 12.c5 Bc7 13.Nd2 Rb8 14.Nf3 Ne4 15.Qd3 Bg6 16.Qa3 Rb4 17.Re1 Qf6 18.Be3 h6 19.Ne5 Be5 20.de5 Qe5 21.Qa5 Rb2 22.Be4 Qe4 (worse is 22...de4 23.Rad1 Qh5 24.Qa6=) 23.Qc3 Rc2 24.Qd4 Qd4 25.Bd4 f6 26.f4 Bh5 27.a4 Be2 28.a5 Ra8 29.Ra3 Kf7 30.Rb1 Bb5 31.Rb2 Rc4 32.Rd2 Ba4 33.Bc3 Rc5 34.Ra4 Rc3 35.a6 Ra7 36.Rb2 e5 37.f5 Ke7 0–1. Pott,Brian (1750) – Deschamp,Guy (2305), IECG, 2004.

4.e3 Nbd7 5.Bb2 =.

4.a4 Bg4

5.Ne5 e6 6.Ng4= Ng4 7.e3?? (7.Bb2 Nd7=) 7...f5 (better 7...Qf6 8.Qg4 Qa1–+) 8.Bb2+= Nd7 9.c4 c6 10.Nc3 Bb4 11.Be2 Ngf6 (11...Qh4 12.g3 Qh3 13.bc6 bc6 14.cd5–/+) 12.Bh5 (12.0-0 0-0+=) 12...g6= 13.Bf3 (better 13.Be2!?=) 13...Ne5–/+ 14.Be2 (14.0-0 Nc4 15.Qc2 0-0–/+) 14...dc4 (14...Nc4!? 15.Bc4 dc4 16.bc6 bc6–/+) 15.bc6=+ bc6 16.Nb5 Nd3 17.Bd3 cd3 (17...cb5 18.Be2 0-0 19.ab5=+) 18.Nd4?? (18.Bf6!? Qf6 19.Nc7 Kf7 20.Na8 Ra8 21.0-0+=) 18...Qd7 (better 18...Qd5 19.Qb3 Kf7–/+) 19.Nc6?? (better 19.Nf5 ef5 20.Bf6=+) 19...Qc6–+ 20.Bf6 0-0 21.Be5 (21.Bd4 Qg2 22.Rf1–+) 21...Rac8 (21...Qg2 22.Rf1 f4–+) 22.Qb3 (22.0-0 Qd5 23.Bf4 Rc2–+) 22...Qc1! 23.Rc1 (23.Qd1 Bd2 24.Kf1–+) 23...Rc1 24.Qd1 Rd1 25.Kd1 Rc8 26.Bc3 Bc3 (better 26...Ba3 27.f4 Rb8–+) 27.dc3 Rc3 28.Kd2 Ra3 (28...Rc2 29.Kd3 Rf2 30.Kc4–+) 29.Rc1 e5 30.Rc5 (30.Rc8 Kg7 31.f3 e4 32.fe4 fe4–/+) 30...e4–+ 31.Ra5 Ra2 32.Ke1 Kf7 (better 32...Ra1!? 33.Kd2 Rg1–+) 33.Ra7=+ Ke6 34.Rh7? (better 34.a5!?=+) 34...Ra4–+ 35.Rb7 (35.g4 Ra1 36.Kd2 Ra2 (36...fg4?! 37.Rh8–/+) 37.Ke1 f4 38.ef4 Ra1 39.Kd2 Rf1 40.f5 gf5 41.gf5 Kd6–+) 35...Ra1 36.Kd2 Ra2 (36...Kf6 37.Rb6 Kg5 38.h4 Kh5 39.Rb7 Kh4 40.Rh7 Kg4 41.Rh6–+) 37.Ke1–/+ Ra6 (37...Re2 38.Kf1 Kd5–/+) 38.Rb5? (38.Rb1 Kf6=+) 38...Kd6 (38...Ra1 39.Kd2 Rf1 40.Rb6 Kf7 41.Rb7 Kf6 42.Rb6 Kg7 43.f3 Rf2 44.Kc3 Rc2 45.Kb3–+) 39.h3 (39.Rb2 Ra1 40.Kd2 Kc5–/+) 39...Ke6 (39...Ra1 40.Kd2 Rf1 41.f3 Rf2 42.Kd1 Rg2 43.fe4 fe4 44.Rb4–+) 40.g4? (better 40.Rb2!?=+) 40...Ra1–/+ 41.Kd2 Rf1 42.gf5 (42.f4 Rf2 43.Kc3 Rc2 44.Kb3 Rc1 45.Re5 Kd6–+) 42...gf5–+ 43.Rb6 Ke5 (43...Ke7 44.f4–+) 44.Rb5? (better 44.f4!? Kd5 45.Rf6=+) 44...Kf6–+ 45.h4?? (better 45.f4–+) 45...Rf2 46.Kd1 (46.Kc3 Rc2 47.Kb3–+) 46...f4 47.ef4 e3 48.Rb3 Rf1 0–1. yodamo – J. Raymond, ChessWorld.net, 2009. (=1.Nf3 Nf6 2.b4 a5 3.b5 d5)

5.Ne5 Bf5 6.e3=+.

5.Ne5 Bh5 6.d4 Nbd7 7.Bb2 (7.Nd2 Ne5 8.de5 Nd7=+) 7...e6=+ 8.g3 (8.Nd7 Qd7 9.Nd2 Bb4=+) 8...c5 (8...Bb4 9.c3 Bd6 10.Nd7 Qd7 11.Ba3=+) 9.bc6=+ bc6 10.Nc6? (better is 10.Ba3=+) 10...Qb6–+ 11.Na5 Qb2 12.Nb3 Bb4 13.N1d2 Ne4 14.Rb1 (14.Qb1 Qb1 15.Rb1 Ra4–+) 14...Nd2 15.Nd2 (15.Rb2?? Nf3) 15...Qd4 (15...Bd2 16.Kd2 Qd4 17.Ke1 Qa4 18.Bg2–+) 16.Bg2 (16.e3 Qd2 17.Qd2 Bd2 18.Kd2 Bf3–+) 16...Ra4 17.Bf3 Bf3 18.ef3 0-0 19.Ke2 Ra2 20.Nb3 Qc4 21.Ke3 Rc2 22.Nc1 Bc5 23.Qd4 Qd4 0–1. Jatkowski – Hjortstam,Kurt, corr 3GMM–01, 1995.

5.h3 Bf3 6.ef3 Nbd7=.

4.Bb2 Bg4

5.c4 e6=.

5.e3 e6 6.Be2 Nbd7 7.a4 Bd6 8.0-0 0-0 9.d3 c6 10.c4 (10.Nc3 Nc5=) 10...dc4=+ 11.dc4 Qc7 12.h3 Bh5 13.Nbd2 Rad8 14.Qc1 (14.Qc2 Bg6 15.Bd3 Bd3 16.Qd3 Rfe8=) 14...e5 15.Re1 (15.Qd1 Bb4 16.Qc2 Rfe8=+) 15...Nc5–/+ 16.e4 (16.Qc3 Rfe8–/+) 16...Bf3 17.Bf3? (better 17.Nf3 Nfe4 18.Qc2–/+) 17...Nd3–+ 18.Qc2 Ne1 19.Re1 cb5 20.ab5 Bb4 21.Bc3 Qc5 22.Nb3? (22.Ra1–+) 22...Qc4 23.Rc1 (23.Re3 Rc8 24.Nd2 Qd4–+) 23...a4 24.Bb4 (24.Na5 Qb5 25.Nc4 Bc3–+) 24...Qb4 (24...Qb3?! 25.Qb3 ab3 26.Rb1–+) 25.Na1 Rd2 (25...Rd2 26.Qc5 Qb2–+) 0–1. agostinhoarruda – pcmvr, net–chess.com, 2019.

5.Ne5 Bf5 6.Nf3=+.

5.Ne5 Bh5 6.g3 c6 7.a4 e6 8.Bg2 Nbd7 9.0-0 Ne5 (9...cb5 10.ab5 Bd6 11.d4=+) 10.Be5 Bb4 11.c3 Bd6 12.Bd6 Qd6 13.d3 0-0 14.Qc2 cb5 15.ab5 Rfc8 16.Na3 (16.c4 a4=+) 16...Qe5–/+ 17.c4 Qe2 (17...Be2? 18.Rfe1+–) 18.Ra2 (18.Rfe1 Qc2 19.Nc2 Bg6=+) 18...Qc2 19.Rc2 a4 20.c5 Kf8 21.Re1 Bg6 22.Rc3 Ke7 23.d4 b6 (23...Ne4 24.Rce3–/+) 24.h3 Kd7 25.Rec1 Rab8 26.c6 Kc7 27.Nc2 Ra8 28.Nb4 Ra5 29.Bf1 Ne4 30.Ra3 Nd2 31.Be2 (31.Na6!? Kd6 32.c7 Nf1 33.Rc6 Ke7 34.Kf1 Rb5 35.Ra4 Bd3 36.Kg2–+) 31...Rca8–+ 32.Na6? (better 32.f3–+) 32...R8a6! 33.ba6 Nb3 34.Rc3 (34.Rd1 Bc2–+) 34…Nd4 (34...Nd4 35.Bf1 h6–+) 0–1. jromero – pcmvr, net–chess.com, 2019.

4.e3 e6

5.c4 c5 6.Bb2 (--> 1.b4 a5 2.b5 c6 3.Bb2 c5 4.e3 e6 5.c4 Nf6 6.Nf3).

5.d4 c6 6.c4 Bb4 7.Bd2 0-0 (7...Be7 8.Nc3=) 8.Bb4+= ab4 9.Nbd2 Ra3 10.Qc2 dc4 11.Bc4 Bd7 12.bc6 (12.Nb1 Ra5+=) 12...Bc6 13.Qb2 Bf3 (13...b5 A) 14.Qb4? Ra4 15.Qb3 bc4 (15...Rc4?! 16.Nc4 bc4 17.Qc4–/+) 16.Nc4 Nbd7–+; B) 14.Be2=) 14.Nf3+= Nc6 15.0-0 Ne4 16.Nd2 Nd2 17.Qd2 e5 (17...Qd6 18.Rfd1+=) 18.d5 Qd6 19.Rab1 Rc8 20.Rfd1 (20.Rfc1 Na5 21.Be2 Rcc3=) 20...Na5= 21.Rb4?? (better is 21.Bd3=) 21...Nc4–+ 22.Rc4 (22.Qe1–+) 22…Rc4 (23.Qb2 b6–+) 0–1. Melia,Ken – Pilz,Erhard, TT–05.55 TSC, 2002.

5.d4 Nbd7 6.Bd3 Bd6 7.Nbd2 (7.Ba3 Ba3 8.Na3 Qe7=) 7...e5 8.de5 Ne5 9.0-0 0-0 10.Ne5 Be5 11.Rb1 Be6 12.Nf3 Bd6 13.Bb2 Qe7 14.Qe2 Ne4 15.Nd4 Bd7 (15...Qh4 16.Nf3 Qh5 17.c4=) 16.Rfd1 a4 17.c4. Tihomir Glowatzky – winugly123, ChessWorld.net, 2008.

5.d4 Ne4 6.Bd3 =.

4.e3 Bf5

5.Bb2 e6 6.Be2 h6 (6...Bd6 7.Nc3=) 7.c4 (7.Nd4 Bg6=) 7...Nbd7 8.cd5 ed5 9.Nc3 Bd6 10.0-0 0-0 11.Nd4 Bg6 (11...Bh7 12.f4=) 12.f4 Nc5 13.Ba3 (13.f5 Bh7=) 13...Ne6 14.Bd6 Qd6 15.Qa4 Nd7 (15...Nd4 16.Qd4 Bf5 17.Qe5=) 16.f5 Nb6 17.Qd1 Nd4 18.ed4 Bh7 19.Bd3 Rfe8 20.Qf3 Rad8 (20...Re7 21.Rae1=) 21.Rae1+= c6 22.bc6 bc6 23.g4 (23.Re2 Re2 24.Qe2 Qf6+=) 23...Nc4= 24.Re8 Re8 25.Bc4 (25.Rf2 Re1 26.Kg2 f6+=) 25...dc4= 26.Qf4 Qd7 27.Rf3 f6 28.Re3 Rd8 29.Ne2 Kh8 30.Re4 Bg8 31.Qe3 Bd5 32.Re7 Qd6 33.Nf4 Kg8 34.Re8 Kh7 35.Ng6 Bf7 36.Nf8 Kg8 37.Rd8 Qd8 38.Ne6 Qd5 39.Nf4 Qd6 40.Ne2 h5 41.h3 a4 42.a3 Kh7 43.Kg2 Kh8 44.Qg3 Qd5 45.Kf2 c5 46.Qe3 cd4 47.Qd4 Qb7 48.Qd6 Kh7 49.Nc3 Qa7 50.Kg2 Be8 51.Qe6 Qb7 52.Kf2 Qa7 53.Ke2 Bf7 54.Qe3 Qb7 55.Kf2 Qd7 56.Ne4 h4 57.Nc5 Qc6 58.Ne6 Qe6 1–0. cachisss (1930) – bla_ner (1930), gameknot.com, 2015.

5.Be2 e6 6.Nh4 Bg6 7.Bb2 Bd6 8.Nc3 Nbd7 9.Ng6 hg6 10.h3 a4 11.a3 c5 12.0-0 Qb6 0–1. Rushton,Darren (1630) – Malmstroem,Jan (1725), TSC, 2002.

4.e3 Bg4

5.Bb2 e6 6.c4 Nbd7 7.cd5 ed5 8.Be2 Bd6 9.h3 (9.0-0 0-0=) 9...Bf5 10.0-0 Nc5 11.Nc3 0-0 12.d3 Re8 13.Na4 Nd3?? (better is 13...Ncd7=) 14.Bd3+– Bd3 15.Qd3 1–0. Pleschke,Helmut – Van Rooijen,Peter, IECG, 2000.

5.Bb2 e6 6.Be2 Bd6 7.d4 Bf3 8.Bf3 Nbd7 9.Nd2 a4 10.a3 c6 11.c4 (11.bc6 bc6 12.c4 0-0=) 11...cb5 12.cb5 Qa5 13.Be2 Ne4 14.Rc1 0-0 15.f3 Nd2 16.Qd2 Qd8 17.Bd3 f5 18.g3 Qe7 19.Rc3 e5 20.0-0 e4 21.fe4 (21.Be2 ef3 22.Bf3 Nf6=) 21...fe4=+ 22.Rf8 Rf8 23.Bf1 Nb6 24.Qc1 Qg5 25.Rc2 Rf3 26.Bg2? (better 26.Rc3–/+) 26...Qe3–+ (26...Qe3 27.Qe3 Re3–+; 26...Re3 27.Rc3 Nc4 28.Rc4 dc4 29.Qc4 Kf8 30.Qc1–/+) 0–1. Uddin,Md Saif (2070) – Majumder,Ahmed Hossain (1990), S. A. Group of Companies Ltd Premier Di, 2017. (=1.Nf3 Nf6 2.b4 a5 3.b5 d5 4.e3 Bg4)

5.Bb2 e6 6.h3 Bh5=.

5.Be2 Nbd7 6.Nc3 (6.Ba3 Bf3 7.Bf3 e5=) 6...e6 (6...e5 7.Bb2=+) 7.h3 (7.Bb2 Bd6=) 7...Bf3 8.Bf3 Ne5 9.d4 (9.Be2 Bd6=) 9...Nf3 (9...Bb4 10.Bd2 Nc4 11.0-0=+) 10.Qf3 Bb4 11.Bd2 Qe7 12.0-0 Bc3 13.Bc3 Qa3 14.Bd2 Ne4 15.Qe2 Qb2 16.Rac1 (16.Rfd1 Qc2 17.Rac1 Qa2 18.Rc7 0-0–/+) 16...Nd2 (16...Qa2!? 17.Rfd1 Qc4 18.Qc4 dc4–/+) 17.Qd2=+ Qb5 18.c4 dc4 19.Qe2 Qd7 (20.Rc4 0-0=+; 19...Ra6 20.Rb1 Qd5 21.Rfc1=+). Namasivayan,Manohar – Dunn,Michael, corr IECC, 1997.

5.Be2 e6 6.0-0 =.

5.Be2 e6 6.h3 Bh5 7.0-0 a4 (7...Nbd7 8.Bb2=) 8.c4 Bd6 (8...Nbd7 9.Nc3+=) 9.d4 Nbd7 (9...dc4 10.Nfd2 Be2 11.Qe2+=) 10.Nbd2+= c6 11.Bb2 0-0 12.c5 Bb8 13.Bc3 cb5 14.Qb1 e5 (14...Bf3 15.Nf3 Ne4 16.Be1+=) 15.Bb5+/– Bg6 Black intends e4 16.Qb4 (16.Qb2 ed4 17.Bd4 Bc7+/–) 16...e4 (16...ed4 17.ed4 (worse is 17.Nd4 Nc5 18.Be2 Qd6+=) 17...Ne4 18.Rfd1+=) 17.Ne5 White prepares c6 (17.Nh4 Qc7 18.f4 ef3 19.Ndf3 Be4=) 17...Ne5 18.de5 Nd7 19.c6 Ne5 (19...bc6 20.Bc6 Ra7 21.Bd5 Ne5 22.Be4+/–) 20.cb7 Ra7 21.Be5 Be5 22.Bc6 (worse is 22.Ba4 Bd6 23.Qb5 Qe7+=) 22...Ba1 23.Ra1 Ra6 24.Rc1 Qc7 (24...Rb6!? 25.Qc5 Bf5+/–) 25.Rc5+– Rb6 26.Rb5 (worse is 26.Qa4 Rb7 27.Qd4 Ra7=) 26...Rb5 27.Qb5 a3 (27...d4!? 28.ed4 h6 29.Qa4+– (29.Ne4?! Be4 30.Be4 Qc1 31.Qf1 Qd2+/–)) 28.Bd5 Rd8 (28...Rb8 29.Ne4 Be4 30.Be4+–) 29.Nb3 (29.Ne4?? Be4 30.Be4 Rd1 31.Qf1 Rf1 32.Kf1 Kf8–+) 29...h5 (29...h6 30.Nc5 Kh7 31.g3 (31.Ne4?! Qe5 32.Nc3 Qc3=) 31...Rd5 32.b8Q Rc5 33.Qc7 Rb5 34.Qa7+–) 30.Qc5 Qb8 (30...Qd7 31.Nd4 Rb8 32.Bc6+–) 31.Nd4 Kh7 32.g3 f6 (32...Kh6 33.Nc6 Rd5 34.Qe7+– (34.Nb8? Rc5 35.Nc6 Rb5–+; 34.Qd5?! Qb7 35.Kg2 f6=)) 33.Qe7 Re8 (33...Rd5?? 34.Ne6 Bf7 35.Qf7+–) 34.Qa3 h4 35.Bc6 hg3 (35...Rh8 36.gh4 Qc7 37.Qa8+–) 36.Be8 Qb7 (36...gf2 37.Kf2 Qb7 38.Bg6 Kg6+–) 37.Bg6 Kg6 38.fg3 Qb1 (38...Qc7 39.Kg2+–) 39.Kg2 Qe1 (39...Kh6 40.h4 Kh7 41.Qb3+–) 40.h4 Qd2 (40...Qb1 41.Qb3 Qc1 42.Qg8 Qd2 43.Kh3+–) 41.Kh3 Qe1 (41...Qd3 42.Qc5+–) 42.Qc5 Qf1 (42...Kf7 43.Qd5 Kf8 44.Qd7+–) 43.Kg4 Qd1 44.Kf4 Qf1 (44...Kh7 45.Qf5 Kh8 46.Qb5+–) 45.Ke4 Qg2 (45...Qa6 46.Qf5 Kf7 47.h5+–) 46.Kf4 Qa2 (46...Qf1 47.Nf3+–) 47.Qc2 Qc2 48.Nc2 1–0. calabuig (2000) – manijer_wmp3 (2160), gameknot.com, 2015.

5.h3 Bc8 A) 6.Be2 A1) 6...e6 7.c4 (7.0-0 Nbd7 8.Nc3 Bd6 9.d4 b6 10.Bd2 Ne4 11.Bd3) 7...Bd6 8.Nc3 0-0 9.0-0 Nbd7 10.d4 dc4 11.Bc4; A2) 6...g6 7.0-0 (7.Nc3 Bg7 8.Ba3 Ne4 9.Ne4 de4 10.Nd4 Bd4 11.ed4) 7...Bg7 8.Nc3 0-0 9.a4 Ne4 10.Bb2 Nd7 11.Bd3; A3) 6...Nbd7 7.Nc3 (7.0-0 e6 8.c4 Bd6 9.cd5 ed5 10.Nc3 0-0 11.Qc2) 7...e5 8.0-0 Bd6 9.a4 0-0 10.Ba3 Ba3 11.Ra3; B) 6.Ba3 B1) 6...Bf5 7.g4 (7.Nc3 Nbd7 8.Nh4 Be4 9.d3 Bg6 10.Be2 e5 11.Bf8) 7...Bg6 8.c4 e5 9.Bf8 Kf8 10.Ne5 Nbd7 11.Nf3; B2) 6...e5 7.Bf8 Kf8 8.Ne5 Nbd7 9.Nd7 Bd7 10.Nc3 Qe7 11.Be2; B3) 6...Nbd7 7.Nc3 (7.c4 e6 8.Bf8 Kf8 9.Nc3 Ne4 10.Qc2 Nc3 11.Qc3) 7...e5 8.Bf8 Kf8 9.h4 e4 10.Nd4 Ne5 11.Be2; C) 6.Bb2 C1) 6...e6 7.Bd3 (7.c4 Bd6 8.Nc3 Nbd7 9.d4 a4 10.c5 a3 11.Bc1) 7...Nbd7 8.0-0 Bd6 9.Nc3 a4 10.Ne2 0-0 11.Ng3; C2) 6...Bf5 7.Bf6 (7.g4 Be6 8.Nd4 Nbd7 9.Ne6 fe6 10.Nc3 a4 11.a3) 7...ef6 8.Nc3 Be6 9.Bd3 Bb4 10.Nd4 0-0 11.0-0; C3) 6...Nbd7 7.Be2 (7.Nc3 e5 8.Be2 Bd6 9.0-0 0-0 10.d3 Re8 11.Na4) 7...e6 8.0-0 Bd6 9.c4 0-0 10.Nc3 Nb6 11.cd5; D) 6.Nc3 D1) 6...Qd6 7.a4 (7.Bd3 Nbd7 8.0-0 g6 9.b6 c6 10.Rb1 Bg7 11.Rb3) 7...Nbd7 8.Ba3 Qb6 9.Be2 e5 10.Bf8 Kf8 11.0-0; D2) 6...e6 7.Bb2 (7.Bd3 Nbd7 8.0-0 Nc5 9.Qe2 Nd3 10.Qd3 Bc5 11.Bb2) 7...Nbd7 8.Bd3 Bd6 9.0-0 a4 10.a3 Nc5 11.Qe2; D3) 6...Nbd7 7.Ba3 (7.d4 e6 8.Bd3 Bd6 9.0-0 0-0 10.Qe2 e5 11.e4) 7...e5 8.Bf8 Kf8 9.Be2 g6 10.0-0 Kg7 11.Qc1.

5.h3 Be6 A) 6.Nc3 A1) 6...Nbd7 7.Nd4 (7.Ba3 g6 8.Bd3 Bg7 9.0-0 0-0 10.Qe2 Re8 11.Nd4) 7...g6 8.Ne6 fe6 9.d4 Bh6 10.Bd3 0-0 11.0-0; A2) 6...Qd6 7.a4 (7.Nd4 Nbd7 8.Be2 g6 9.a4 Bg7 10.Ba3 Qb6 11.0-0) 7...Nbd7 8.Ba3 Qb6 9.Bd3 g6 10.0-0 Bg7 11.Nd4; A3) 6...g6 7.Ng5 (7.Be2 Nbd7 8.Nd4 Bg7 9.0-0 0-0 10.Ba3 Nb6 11.Bd3) 7...Nbd7 8.Ne6 fe6 9.Be2 Bg7 10.d4 0-0 11.0-0; B) 6.Be2 B1) 6...g6 7.Nc3 (7.0-0 Bg7 8.Nd4 Nbd7 9.Nc3 0-0 10.Ba3 Nb6 11.Bd3) 7...Bg7 8.Nd4 Nbd7 9.Ne6 fe6 10.d4 0-0 11.0-0; B2) 6...Bf5 7.Nc3 (7.0-0 Nbd7 8.Bb2 e6 9.Nh4 Bd6 10.Nf5 ef5 11.c4) 7...Nbd7 8.0-0 e5 9.g4 Be6 10.Ng5 Bb4 11.Bb2; B3) 6...Nbd7 7.Nc3 (7.0-0 g6 8.Nc3 Bg7 9.Nd4 Nc5 10.Ba3 Nfe4 11.Ne4) 7...g6 8.Ba3 Bh6 9.0-0 0-0 10.Nd4 Nb6 11.d3; C) 6.Nd4 C1) 6...Bc8 7.Nc3 (7.Be2 e5 8.Nf3 Bd6 9.Nc3 0-0 10.Bb2 h6 11.0-0) 7...e5 8.Nf3 Bd6 9.Be2 0-0 10.0-0 Bf5 11.Bd3; C2) 6...g6 7.Nc3 (7.Ne6 fe6 8.Nc3 Bg7 9.Ba3 0-0 10.Bd3 Nbd7 11.0-0) 7...Bg7 8.Be2 Nbd7 9.Ne6 fe6 10.d4 0-0 11.0-0; C3) 6...Bd7 7.Nc3 (7.Nf3 Be6 8.Nc3 g6 9.Nd4 Bg7 10.Be2 Qd6 11.a4) 7...e5 8.Nf3 Bd6 9.Be2 e4 10.Nd4 0-0 11.Bb2; D) 6.Ba3 D1) 6...g6 7.Nc3 (7.Bd3 Bg7 8.Nc3 Nbd7 9.0-0 0-0 10.Qe2 Re8 11.Nd4) 7...Nbd7 8.Bd3 Bg7 9.0-0 0-0 10.Qe2 Re8 11.Nd4; D2) 6...Bf5 7.Nc3 (7.Bd3 Bd3 8.cd3 Nbd7 9.d4 e6 10.Bf8 Nf8 11.Nc3) 7...Nbd7 8.Bd3 Bd3 9.cd3 e5 10.Bf8 Kf8 11.Rc1; D3) 6...Nbd7 7.Nc3 (7.Bd3 g6 8.0-0 Bg7 9.Nc3 0-0 10.Qe2 Re8 11.Nd4) 7...g6 8.Bd3 Bg7 9.0-0 0-0 10.Qe2 Re8 11.Nd4.

5.h3 Bf3 6.Qf3 (6.gf3 A) 6...e5 7.Rg1 (7.Nc3 Be7 8.Rg1 0-0 9.Bb2 Nbd7 10.Na4 g6 11.h4) 7...Nbd7 8.Nc3 g6 9.Bb2 Bd6 10.h4 Qe7 11.Qe2; B) 6...Nbd7 7.Nc3 (7.Rg1 g6 8.Nc3 Nc5 9.Qe2 Qd7 10.Bg2 e5 11.f4) 7...e5 8.Rg1 g6 9.Bb2 Bd6 10.h4 Qe7 11.Bh3; C) 6...e6 7.Nc3 (7.Rg1 Nbd7 8.Nc3 g6 9.Bb2 Bd6 10.f4 a4 11.a3) 7...Bd6 8.f4 Nbd7 9.Rg1 0-0 10.Bb2 Nc5 11.Qf3) 6...e6 (6...Nbd7 7.Ba3 (7.Nc3 e6 8.Be2 Bd6 9.d4 Bb4 10.Bd2 Bc3 11.Bc3) 7...e5 8.Bb2 Bb4 9.a3 e4 10.Qg3 Bc5 11.Qg7; 6...e5 7.Be2 (7.Bb2 Qd6 8.Nc3 Nbd7 9.Qg3 e4 10.Ne2 g6 11.Nf4) 7...Qd6 8.Nc3 Nbd7 9.0-0 e4 10.Qf5 Qe5 11.Qe5) 7.c4 (7.Bb2 Nbd7 8.Nc3 a4 9.Qg3 a3 10.Bc1 Nc5 11.Be2; 7.Bd3 Nbd7 8.Bb2 Bd6 9.0-0 0-0 10.Nc3 Ne5 11.Qe2) 7...c6 (7...Nbd7 8.cd5 Nd5 9.Bb2= Bd6 10.Bg7 Rg8 11.Bd4) 8.Nc3 Be7 (8...Bb4 9.Bb2= 0-0 10.a3 Bc3 11.Bc3) 9.Be2 (9.Rb1 0-0 10.bc6 bc6 11.cd5) 9...cb5 (9...0-0 10.Rb1+= Qc7 11.0-0; 9...Nbd7 10.bc6 bc6 11.cd5) 10.cd5 (10.Nb5 0-0 11.Bb2) 10...b4 (10...Nd5 11.Bb2) 11.d6 Bd6 12.Qb7 Nbd7 (12...Na6 13.Na4 Nc5 14.Nc5 Bc5 15.Qb5 Nd7 16.Bb2+=) 13.Nb5+/– Be5 (13...Ke7!? 14.Nd4 Kf8+/–) 14.d4+– Rb8 15.Qf3 Bc7 16.Bd2 0-0 17.Rc1 Rc8 18.Na7 (18.0-0 Nb6+/–) 18...Ra8+/– 19.Nc6 Qe8 20.Nb4 (20.0-0 e5+/–) 20...ab4 21.Rc7 1–0. Wiese,Uwe (2375) – Bartelt,Rasmus (2000), remoteschach.de, 2010.

5.h3 Bf5 A) 6.Nc3 A1) 6...Qd6 7.a4 (7.Nd4 Bg6 8.f4 e5 9.fe5 Qe5 10.Bd3 Bd6 11.Bg6) 7...Nbd7 8.Ba3 Qb6 9.g4 Be6 10.Bd3 h6 11.0-0; A2) 6...e6 7.Bb2 (7.Nd4 Bg6 8.Be2 e5 9.Nf3 Nbd7 10.Bb2 Bb4 11.0-0) 7...Nbd7 8.Nh4 Bg6 9.Be2 Bd6 10.0-0 Nc5 11.f3; A3) 6...Nbd7 7.Bb2 (7.Nh4 Be4 8.Be2 e6 9.0-0 Bd6 10.d3 Bg6 11.e4) 7...e5 8.g4 Be6 9.g5 Ne4 10.Ne4 de4 11.Ne5; B) 6.Be2 B1) 6...e6 7.0-0 (7.Nd4 Bg6 8.0-0 Nbd7 9.Nc3 Bd6 10.f4 0-0 11.Bf3) 7...Bc5 8.Nh4 0-0 9.Nc3 Nbd7 10.Nf5 ef5 11.Bb2; B2) 6...e5 7.Ne5 (7.Bb2 Nbd7 8.Ne5 Be7 9.Nf3 Nc5 10.Nc3 0-0 11.0-0) 7...Nbd7 8.Nf3 Bb4 9.Nd4 Bg6 10.0-0 0-0 11.f4; B3) 6...Nbd7 7.Nh4 (7.Bb2 e6 8.Nc3 Bd6 9.0-0 0-0 10.Nh4 Bg6 11.Ng6) 7...Bg6 8.Nc3 e6 9.Bb2 Bd6 10.0-0 0-0 11.Ng6; C) 6.Bb2 C1) 6...e6 7.Nh4 (7.Nd4 Bg6 8.Bd3 e5 9.Bg6 hg6 10.Nf3 e4 11.Nd4) 7...Be4 8.Be2 Nbd7 9.Nc3 Bd6 10.0-0 0-0 11.d3; C2) 6...Bg6 7.Bf6 (7.Nc3 Nbd7 8.Ne2 e6 9.Nf4 Bb4 10.Be2 0-0 11.0-0) 7...gf6 8.c4 Nd7 9.Nc3 dc4 10.Bc4 Nb6 11.Be2; C3) 6...Nbd7 7.Nc3 (7.Be2 e6 8.Nd4 Bg6 9.Nc3 Bc5 10.0-0 a4 11.a3) 7...e5 8.g4 Be6 9.g5 Ne4 10.Ne4 de4 11.Ne5; D) 6.g4 D1) 6...Be4 7.Nc3 (7.Bb2 h6 8.Nc3 Nbd7 9.Bg2 e6 10.Ne4 de4 11.Nd4) 7...h6 8.d3 Bf3 9.Qf3 e6 10.Bg2 Bd6 11.0-0; D2) 6...Be6 7.Nc3 (7.Bg2 h5 8.g5 Ne4 9.Bb2 Qd6 10.Ba3 Qb6 11.d3) 7...Qd6 8.a4 Nbd7 9.Ba3 Qb6 10.Bg2 g6 11.g5; D3) 6...Bg6 7.Bb2 (7.Nc3 Nbd7 8.g5 Ne4 9.Nd5 Ne5 10.Nf4 Nf3 11.Qf3) 7...Nbd7 8.Nc3 Nc5 9.Be2 a4 10.a3 e6 11.g5.

5.h3 Bh5 A) 6.Nc3 A1) 6...Nbd7 7.Ba3 (7.g4 Bg6 8.g5 Ne4 9.Nd5 Ne5 10.Nf4 Nf3 11.Qf3) 7...e6 8.Bf8 Rf8 9.Bd3 Nc5 10.0-0 Nfe4 11.g4; A2) 6...Qd6 7.Be2 (7.a4 Ne4 8.Ba3 Nc3 9.dc3 Qf6 10.Bb2 e6 11.g4) 7...Nbd7 8.0-0 Bf3 9.Bf3 Ne5 10.Bb2 Nc4 11.Rb1; A3) 6...e6 7.Bb2 (7.Rb1 Nbd7 8.Bb2 Bd6 9.Be2 0-0 10.0-0 Nc5 11.Nd4) 7...Nbd7 8.g4 Bg6 9.g5 Ne4 10.h4 h6 11.d3; B) 6.Ba3 B1) 6...e6 7.Bf8 (7.Bb2 Nbd7 8.Nc3 Bc5 9.Be2 0-0 10.0-0 Qe7 11.d4) 7...Rf8 8.Nc3 Nbd7 9.Be2 Bf3 10.Bf3 Ne5 11.0-0; B2) 6...Bf3 7.Qf3 (7.gf3 Nbd7 8.Nc3 e5 9.Bb2 Bd6 10.Rg1 0-0 11.Bd3) 7...e6 8.Bf8 Kf8 9.Nc3 Nbd7 10.Bd3 g6 11.0-0; B3) 6...Nbd7 7.Nc3 (7.g4 Bg6 8.Nc3 e6 9.Bf8 Rf8 10.d3 Nc5 11.Qd2) 7...e6 8.Bf8 Rf8 9.Be2 Bf3 10.Bf3 Ne5 11.0-0; C) 6.Bb2 C1) 6...e6 7.c4 (7.d3 Nbd7 8.Nc3 Bd6 9.Be2 0-0 10.0-0 Nc5 11.Ba3) 7...Nbd7 8.Nc3 Bf3 9.gf3 dc4 10.Bc4 Ne5 11.Qe2; C2) 6...Bg6 7.Nc3 (7.Bf6 gf6 8.c4 Nd7 9.Nc3 dc4 10.Bc4 Nb6 11.Be2) 7...Nbd7 8.Ne2 e6 9.Nf4 Bd6 10.Be2 0-0 11.0-0; C3) 6...Nbd7 7.Be2 (7.Nc3 e6 8.Be2 Bd6 9.Nd4 Bg6 10.0-0 0-0 11.f4) 7...e6 8.0-0 Bd6 9.Nc3 0-0 10.Nd4 Bg6 11.f4; D) 6.Be2 D1) 6...Nbd7 7.Bb2 (7.Nc3 e6 8.0-0 Bc5 9.Na4 Bd6 10.Bb2 0-0 11.d3) 7...e6 8.0-0 Bd6 9.Nc3 0-0 10.Nd4 Bg6 11.f4; D2) 6...Bf3 7.Bf3 (7.gf3 Nbd7 8.Nc3 Nc5 9.d4 Ne6 10.Rg1 Qd6 11.a4) 7...Nbd7 8.Bb2 e6 9.Nc3 Ne5 10.0-0 Nc4 11.Qc1; D3) 6...e6 7.Nc3 (7.0-0 Nbd7 8.Bb2 Bc5 9.c4 dc4 10.Na3 Nb6 11.Nc4) 7...Nbd7 8.0-0 Bc5 9.Nd4 Be2 10.Qe2 0-0 11.Nf3.

3.Nf3 d6

4.Bb2 c5 5.e3 g6 (5...e5 6.d3=) 6.c4 (6.Bf6 ef6 7.d4 Nd7+=) 6...Bg7= 7.a4 0-0 8.Bd3 (8.Be2 Qb6=) 8...d5 9.h4 (9.0-0 Bg4=) 9...Bg4 10.Qc2 Nbd7 11.Ne5 (11.cd5 Nd5 12.Bg7 Kg7=+) 11...Ne5 12.Be5 d4 (12...Rc8 13.Nc3=+) 13.Na3 (13.f3 Bc8=) 13...Nh5 (13...Nd5 14.Bg7 Nb4 15.Qb3 de3 16.0-0 Kg7 17.Be4 ed2 18.Bb7–/+) 14.Bg7= Ng7 15.f3 Bc8 16.h5 (16.g4 Qd6 17.0-0-0 e5=) 16...Bf5 (16...Nh5!? 17.g4 Ng7=+) 17.hg6= fg6 18.e4 Be6 19.0-0-0 Nh5 20.Rh5 (20.e5 Kg7=) 20...gh5 21.Rh1 (21.e5 h6=) 21...Bf7 (21...Qe8!?=+) 22.e5= The pawn on h7 gets attacked 22...Kg7 (22...h6 23.Bh7 Kg7 24.e6=) 23.Bh7 Qd7 (23...Qc7 24.e6 Be8 25.Be4=) 24.Bf5+= e6 25.Be4 Rab8 26.b6 (26.Qd3 Rg8+=) 26...Qe8 (26...Qd8 27.g4=) 27.Nb5 Bg6?? (better 27...Qd8+=) 28.Nd6+– Qe7 (28...Qc6 29.Bg6 (29.Bc6?! Bc2 30.Kc2 bc6+–) 29...d3 30.Bd3+–) 29.Bg6 Rbd8 (29...Rh8 30.Nf7 Qd7 31.Nh8 Rh8+–) 30.Rh5 Rd6 (30...d3 31.Rh7 Kg8 32.Re7 dc2+–) 31.Rh7 (31.Rh7 Kg8 32.Re7 Rf3 33.gf3 Rd7 34.Bf7 Kf8 35.Qh7 Ke7 36.Bh5 Kd8 37.Qg8 Ke7 38.Qe8) 1–0. yodamo – routermeister, ChessWorld.net, 2008. (=1.Nf3 Nf6 2.b4 a5 3.b5 d6)

4.Nc3 d5 5.Ba3 =.

4.d4 c6 5.a4 g6 6.Bb2 Bg7 7.e3 0-0 8.c4 (8.Bd3 Qb6=) 8...Nbd7 (8...Qb6 9.Ba3=) 9.Be2 Ne4 10.Nbd2 Ndf6 11.0-0 cb5 12.ab5 b6 13.Bd3 Bb7 14.Qc2 Nd2 15.Nd2 Rc8 16.Rac1 Rc7 17.Qb3 Qa8 18.d5 Nd7 19.Bg7 Kg7 20.Qb2 Kg8 21.Nb3 (21.Nf3 h6=) 21...Nc5 (21...a4 22.Ra1=) 22.Nc5 Rc5 23.f4 e6 24.e4 Qd8 25.Rf3 Qh4 26.Rcf1 Re8 27.Rh3 Qe7 28.f5 ef5 29.ef5 Qe5 30.Qd2 Bc8 31.Rg3 Qd4 32.Kh1 Re5? (32...Qg7!?=) 33.Qg5 (33.fg6!? hg6 34.Qh6+–) 33...Bf5 34.Bf5 Qc4?? (better is 34...Kg7 35.Rg4 Qe3 36.Qe3 Re3+=) 35.Qd8+– Kg7 36.Bd3 Qd5 37.Qf6 (37.Qf6 Kf8 38.Qh8 Ke7 39.Qh7+–) 1–0. Mrozinski,Werner – Kedziora,Claus (2245), Ruhrgebiet–ch, 2000. (=1.Nf3 Nf6 2.b4 a5 3.b5 d6)

4.d4 Bf5 5.e3 =.

4.d4 g6 5.Bb2 (5.e3 Bg7=) 5...Bg7 (5...Bf5 6.e3+=) 6.Nbd2 (6.e3 0-0=) 6...0-0 (6...Bf5 7.e3=) 7.e4 e5 (7...d5!?=) 8.de5+= Ng4 (8...de5 9.Ne5 Ng4 10.Ng4 Bb2 11.Rb1=) 9.Nc4+/– Ne5 (9...Qe7 10.ed6 Qe4 11.Qe2 Qe2 12.Be2 Bb2 13.Nb2 cd6 14.Nc4+–) 10.Nce5 (10.Be5?! de5 11.Qd8 Rd8=) 10...de5 11.Qd8 (11.Ne5?! Qe7 12.Qd4 Re8=) 11...Rd8 12.Be5 (12.Bc4 c6 13.Ne5 Be5 14.Be5 Re8+=) 12...Re8 13.0-0-0 Bh6 (13...Be5!? 14.Ne5 Kg7+=) 14.Kb1+/– Nd7 15.Bb2 (15.Bc7 Nc5 16.Bd3 Ne4 17.Be4 Re4 18.Rd8 Kg7+/–) 15...Nc5 (15...Re4 16.Bd3 Rg4 17.g3+=) 16.Bd3 (16.e5 Ne4 17.Bd4 Bg4+=) 16...Bd7 (16...Ne4? 17.Be4 Re4 18.Rd8 Bf8 19.Ba3+–) 17.Ne5 (17.c4 Nd3 18.Rd3 Be6+=) ½–½. Serebrisky,Alexandr – Wenger,Klaus, corr Danube, 1989. (=1.Nf3 Nf6 2.b4 a5 3.b5 d6)

4.Bb2 e5

5.a4 Nbd7 6.e3 g6 7.d4 e4 8.Nfd2 Bg7 9.Be2 Qe7 10.c4 0-0 11.0-0 b6 12.Nb3 Bb7 13.Qc2 Ne8 14.Nc3 f5 (14...Nef6!?=) 15.Nd5+= Bd5 16.cd5 Ndf6 17.Nd2 Bh6 (17...Nd5 18.Bc4 Nef6 19.Qb3+–) 18.g3 (18.Nb1 f4 (18...Nd5?? 19.Bc4 Kg7 20.Bd5+–) 19.ef4 Bf4+= (19...Nd5 20.Bc4 Qe6 21.Nc3+–)) 18...Ng7 (18...Nd5 19.Qb3 Nef6+–) 19.Bc1 Rae8 (19...Nd5?? 20.Bc4+–) 20.Ra3 Ng4 Black prepares f4 (20...Qf7 21.Bc4+/–) 21.h3 Nf6 22.Re1 f4 23.ef4 Nf5 24.Qc4 e3+= 25.Nf1 ef2 26.Kf2 Bg7 27.Bb2 Rf7 28.Raa1 Qd7 29.Bf3+= Rfe7 30.Bc3 Re1 31.Re1 Re1 32.Ke1 Kf7 33.Qe2 Qe7? 34.Qe7 Ke7 35.Kd2 Nh5 36.Bh5 gh5 37.Kd3 Bf6 38.Ke4 Ng7 39.Ne3 Kf7 40.Nc4 Kg6 41.Ne3 Be7?? 42.Be1 Ne8 43.g4 hg4 44.hg4 Nf6 45.Kf3 h5? 46.g5 Ne8 47.Bh4 Ng7 48.Ke4 Kf7 49.f5 Bf8 50.g6 Kg8 51.f6 Be7 52.fe7 Ne8 53.Nc4 Nf6 54.Bf6 (54.Bf6 h4 55.e8Q#) 1–0. Salvatti,D (2110) – Figar,Nicolas (1800), Mar del Plata ARG, 7th Continental Ch, 2012. (=1.Nf3 Nf6 2.b4 a5 3.b5)

5.e3 b6 6.a4 (6.Nc3 Be7+=) 6...Bb7 7.Bc4 d5 8.Bb3 c5 (8...e4 9.Nd4=) 9.c4 (9.bc6 Nc6 10.Ne5 Ne5 11.Be5 Bd6+–) 9...Bd6 (9...Nbd7 10.Be5 dc4 11.Bc4 Bf3 12.Bf6 Bd1 13.Bd8 Ba4 14.Bc7+=) 10.Ne5 (10.cd5 Nd5 11.Ne5 Be5 12.Be5 Qg5+–) 10...d4 11.ed4 0-0 12.0-0 Ne4? (12...cd4 13.Bd4 Nbd7 14.Nc6+–) 13.Qh5 (13.d3!? cd4 14.de4 Be5+–) 13...Nf6 14.Qf5 Bc8 (14...Nbd7 15.Nc6 Qc7 16.d5 Bh2 17.Kh1+–) 15.Qc2 (15.Qf3 Ra7 16.dc5 bc5+–) 15...Nbd7 (better 15...cd4!? 16.Bd4 Re8+–) 16.Nc6 Qc7 17.d5 (17.g3 cd4 18.Bd4 Bb7+–) 17...Bh2+– 18.Kh1 Ne5 (better 18...Qf4 19.Qf5 Qh4+–) 19.Qf5?? (better 19.Na3+–) 19...Bf5–+ 20.g3 Bg3! 21.fg3 Be4 22.Kg1 Nf3 (better 22...Nd3 23.Be5 Ne5 24.Rf6 gf6–+) 23.Kf2 Ng4 24.Ke2 Qg3 25.Nc3 Nd4 (25...Qh2 26.Rf2 Qf2 27.Kd1 Qd2) 26.Nd4 cd4 (26...Qg2 27.Ke1 Bd3 28.Nde2 Rfe8 29.Rf3 Qf3 30.Ne4 Qe2) 27.Ne4–+ d3 28.Kd1 Qg2 29.Re1 f5 (29...Rae8 30.Bc3 Re4 31.Re4 Nf2 32.Kc1 Ne4 33.Bc2 dc2 34.Kc2–+) 30.Ng5 (30.Nd6 Qg3 31.Bc3 Qd6–+) 30...Nf2 31.Kc1 Qg5 32.Bc3 Rae8 33.Kb2 Re2 34.Rg1 (34.Ka3 Qd8 35.d6 Ne4–+) 34...Rd2 35.Ka3 Qe7 (35...Qe7 36.d6 Qd7 37.Bd2 Kh8–+) 0–1. yodamo – azazael, ChessWorld.net, 2008. (=1.Nf3 Nf6 2.b4 a5 3.b5 d6)

5.e3 Be7 6.Nc3=.

4.Nc3 g6

5.e4+= Bg7 6.d4 0-0 7.Be2 b6 (7...c5 8.0-0=) 8.0-0+= Bb7 9.Qd3 Nbd7 (9...c5 10.bc6 Nc6 11.a3+=) 10.Be3 e5 (10...Ng4 11.Bd2+=) 11.d5 Ng4 12.Bg5 f6 13.Bh4 Nc5 14.Qc4 g5 15.Bg3 f5 16.ef5 Nh6 17.Rae1 (17.Ne4 Ne4 18.Qe4 Bc8+=) 17...Nf5 18.Ne4 Ne4 (18...g4 19.Nc5 bc5 20.Qg4 Bd5 21.c4+=) 19.Qe4 Ng3 (19...g4 20.Nd2 h5 21.Bd3+=) 20.fg3 White gets in control. 20...Qe7 (20...Bf6 21.Rf2+=) 21.Nd4+/– Rf1 22.Rf1 Rf8 23.Nf5 Qd7 24.Bd3 Rf7 25.Rf3 Bc8 26.Qg4 h6 27.Qe4 (27.c3 Rf6+/–) 27...Bf8 28.g4 (28.a3 Qe8+/–) 28...Bb7 29.c3 Bc8 30.a3 (30.Rf2 Bb7+/–) 30...Bb7 31.Rf1 ½–½. marekt – girke, ChessWorld.net, 2003.

5.e4+= Bg7 6.d4 c5 7.bc6 Nc6 8.Be2 0-0 9.Bg5 h6 10.Be3 Ng4 11.0-0 e5 12.d5 Ne3 13.fe3 Ne7 14.Rb1 Qc7 15.Qd3 Bd7 16.Nb5 Qc5 17.Qc3 Qc3 18.Nc3 Rab8 19.Nb5 Bb5 20.Rb5 b6 21.c4 Nc8+= 22.Rfb1 Ra8 23.a3 Ra7 24.Kf2 f5 25.ef5 gf5 26.g3 Raf7 27.h3 f4 28.ef4 ef4 29.Rg1 fg3 30.Rg3 Kh8 31.Ke3 Re7 32.Kd2 Rfe8 33.Bd3 Rf8 34.Bg6 Rf4 35.Kd3 Rf6 36.Rb1 Rf4 37.Rbg1 Rc7 38.Be4 b5 39.cb5+– Rc3 40.Kd2 Rc7 41.Ke3 Rf8 42.Nd4 Rc3 43.Bd3 Bd4 44.Kd4 Ra3 45.Rg6 Ra4 46.Kc3 Rh4 47.Rg7 Nb6 48.Rh7# 1–0. marekt (2260) – netplayer29 (2045), ICC, 2003.

3.Nf3 e6

4.Bb2 Bc5 5.e3 c6 (5...d5 6.d4 Bb4 7.c3+=) 6.Nc3 b6 (6...d5 7.d4 Bd6 8.Bd3+=) 7.a4 (7.Ne5 0-0+–) 7...d5 8.g3 (8.Bd3 0-0+=) 8...Bb7 9.Bg2 Qe7 10.bc6 (10.Ne5 0-0+=) 10...Nc6 11.0-0 Rd8 (11...0-0 12.Nb5 Ba6 13.Rc1+=) 12.Nb5 0-0 (12...Ba6 13.Re1+–) 13.d4+– Bd6 14.Nd6 Qd6 (14...Rd6 15.c3+–) 15.Ba3 Qd7 (15...Qc7 16.Bf8 Rf8 17.Qb1+–) 16.Ne5+– Qc7 17.Nc6 Bc6 18.Bf8 Kf8 19.Qd3 Ne4 (19...Bd7 20.Rfc1+–) 20.c4 f5 21.Rfc1 Qd6 22.Rab1 g5 0–1. sasikumar – vaingrecsky, net–chess.com, 2019.

4.Bb2 c6 5.Nc3 Qb6 (5...d5!?=) 6.Na4 Qc7 7.Bf6 gf6 8.c4 cb5 9.cb5 d6 10.Rc1 Qe7?? (better is 10...Qd8+/–) 11.Rc8+– (11.Rc8 Qd8 12.Rd8 Kd8 13.Nb6+–) 1–0. marekt – Barnsley, ChessWorld.net, 2003.

4.Bb2 d6 5.a4 e5 6.e3 Bg4 7.Be2 Nbd7 8.d3 c6 9.c4 cb5 10.cb5 Be7 11.Nbd2 b6 12.e4 0-0 13.Qb3 (13.d4 d5+=) 13...Nc5 14.Qd1 Rc8 15.0-0 Ne6 16.Re1 Bh5 17.Qb3 Re8 18.d4 ed4 19.Nd4 Be2 (19...Nc5 20.Qh3 Bg6+=) 20.Ne2 (better 20.Ne6!? Bc4 21.Nc4 fe6 22.Rad1+–) 20...Nc5 21.Qf3 Nfd7 22.Nd4 (better 22.Nc4!?+=) 22...Ne5=+ 23.Qe3 (23.Qa3 Bg5 24.N4f3 Nf3 25.Nf3 Ne4=+) 23...Bf6 (23...Ned3 24.Nc6 Rc6 25.bc6 Nb2 26.Qe2–+) 24.Nc6 (better 24.Qe2!?=+) 24...Nc6–/+ 25.Bf6 Qf6 (25...gf6?! 26.bc6 Rc6 27.Qf3=) 26.bc6 Rc6 27.Qa3 Nd7 28.Rad1 Ne5 29.Qa1 (29.Qe3 Rec8–/+) 29...Rcc8 (29...Nd3 30.Qf6 gf6 31.Re3–/+) 30.Nb3 Rcd8 31.Nd4 Qh4 (31...d5!?–/+) 32.Nf5= The isolani on d6 becomes a target 32...Qf6 (32...Qg5 33.Re3 Ng4 34.Ree1=) 33.f3 (33.f4!? Ng4 34.Qf6 Nf6 35.Nd6+–) 33...g6 34.Ng3 (34.Ne3 Rc8=) 34...h5 35.Ne2 Qh4 (35...h4 36.h3=+) 36.Ng3 (36.Qd4!?=) 36...Qg5=+ 37.Qd4 (better 37.Qc3!?=+) 37...h4–/+ 38.Nf1?? (better 38.f4 Qf4 39.Rf1–+) 38...Qh5 (better 38...Nf3 39.Kh1 Nd4 40.Rd4 d5–+) 39.h3 (39.Qb6 Nc4 40.Qf2 Rb8=) 39...Qg5= 40.Nh2 Qf4 (40...Rb8 41.Rf1 Nc6 42.Qd6=) 41.Qe3 (better 41.Qb6 d5 42.Qa5+=) 41...Qg3?? (41...Qe3 42.Re3 Re6 43.Nf1=+) 42.Qf2?? (42.Nf1 Nf3 43.Qf3 Qf3 44.gf3+–) 42...Qg5?? (better 42...Qf2 43.Kf2 Re6=+) 43.f4+– (43.Qb6?! Nc4 44.Qf2 Rb8+=) 43...Qh6? (better 43...Qg3 44.fe5 Qf2 45.Kf2 de5+–) 44.fe5 de5 45.Rf1 (better 45.Ng4 Qf8 46.Qb6 Rd1 47.Rd1+–) 45...Rf8?? (45...Qf4 46.Qb6 Rd1 47.Rd1 Qe4+–) 46.Rd8 Qg7 47.Rf8 Qf8 48.Qf7! Qf7 49.Rf7 Kf7 50.Ng4 (50.Ng4 Ke6 51.Ne3+–) 1–0. alessandrocarvalhaes (1825) – batman2025 (1900), lichess.org, 2020.

4.Bb2 e5 5.Be5 Be7 6.e3 0-0 7.Bb2 c6 8.bc6 (8.Be2 d5+/–) 8...dc6+= 9.Be2 Qb6 10.Qc1 Bg4 11.Nc3 Nbd7 12.0-0 Rfe8 13.h3 Bh5 14.Rb1 Qc7 15.Nd4 Bg6 16.f4 Bc5 17.Nf3 (17.Na4 Bd4 18.Bd4 b5+/–) 17...Ba7 (17...b5 18.Ne5+=) 18.Nh4+/– b5 (18...Ne4 19.Kh2+/– (worse is 19.Ng6 Nd2 20.Ne5 Be3 21.Kh1 Ne5 22.fe5 Qe5–/+)) 19.Ng6 hg6 20.Bf3 b4 21.Ne2 Rad8 22.c3 Ne4 (22...Qd6 23.Qc2+/–) 23.Be4+– ½–½. Fournier,Frederic – Stummerer,Alfred, corr B4/07/33, 2007.

4.c4 d5 5.e3 Nbd7 6.Bb2 (--> 4.Bb2 d5 5.e3 Nbd7 6.c4).

4.d4 Ne4 5.e3 (5.a3 d5 6.Nfd2 Nd6 7.e3 c6 8.Nc3 Bd7 9.Rb1=) 5...d5 6.Bd3 Bb4 7.Bd2 Nd2 8.Nbd2 0-0 9.0-0 =.

4.g3 Be7 5.Bg2 0-0 6.0-0 c6 7.a4 (7.Nc3 d5 8.e3 Ne4=) 7...cb5 8.ab5 d5 9.d4 Bd7 (9...Nbd7 10.Qd3+=) 10.Qd3+= Ne4 11.Ba3 (11.Ne5 f5 12.f3 Nd6+=) 11...Nd6 12.Nc3 Qc7 (12...Be8!?+/–) 13.Ne5 Rc8 14.Bc5 b6 15.Bd5 Ra7 (15...bc5 16.Ba8 cd4 17.Ne4 (worse is 17.Nd7 Nd7 18.Bc6 Ne5 19.Qd4 Nc6 20.bc6 Qc6+=) 17...Bb5 18.Qd4+=) 16.Rfb1 (16.Rab1 A) 16...ed5 17.Nd5 Bf5 18.Bd6 (18.Nc7?! Bd3 19.Bb6 Rac7 20.Bc7 Bc2 21.Bd6 Bd6+=) 18...Qd6 19.Qf5+–; B) 16...a4 17.Bf3 a3+– (17...bc5 18.b6 Qb7 19.Bb7 Rb7 20.d5+–)) 16...Qd8 (16...bc5?? 17.b6 cd4 A) 18.ba7 Qa7 19.Nd7 A1) worse is 19...Qd7 20.Na4 (20.Qd4? Bf6 21.Qa4 Qa4 22.Ra4 Bc3–+; worse is 20.Ra5 Qc7 21.Bb7 Rd8–/+) 20...Qa7 21.Nb6+/–; A2) 19...Nd7–/+; B) 18.bc7 Rac7 19.Qd4+– (worse is 19.Nd7 Nd7 20.Nb5 Nc5 21.Qd4 Nb5 22.Rb5 ed5 23.Raa5 Ne6 24.Qd5 Rc2+–); 16...ed5 17.Nd5 Bf5 18.Bd6 (18.Nc7 Bd3 19.Bb6 Rac7 20.Bc7 Bc2 21.Bb8 Rb8+–) 18...Bd6 19.Qf5 Qc2 20.e4 Be5 21.Rb2 (worse is 21.de5 Rb7+–; 21.Qe5?! Nd7 22.Qd6 Re8+–) 21...Bd4 22.Rc2 Rc2 23.e5+–) 17.Bd6 Bd6 18.Bf3 Be5 19.de5 Be8 20.Qd8 Rd8 21.Na4 Nd7 22.Rd1 Rb8 23.Bc6 Kf8 24.f4 Nc5 25.Nc5 bc5 26.Be8 Ke8 27.c4 Rd8 28.Rdb1 Rda8 (28...Kd7 29.Ra4+–) 29.Ra4 Kd7 30.Kf2 Rb8 (30...Kc8 31.Rba1+–) 31.Rba1 Rba8 32.Rd1 Kc8 33.Rd6 Kb7 34.e4 g6 35.Kf3 Rc8 36.Kg4 h6 37.f5 ef5 38.ef5 h5 39.Kf4 gf5 40.Kf5 Raa8 41.Rd7 Rc7 42.Rc7 Kc7 43.Kf6 Re8 44.Ra5 Re6 45.Kf5 Kb7 46.Ra6! (46.Ra6 Re8 47.Rf6+–) 1–0. gtate (2620) – huimre (2765), net–chess.com, 2007.

4.Bb2 c5

5.a4 b6 6.c4 Bb7 7.d3 (7.Nc3 d5 8.e3 Nbd7=) 7...Be7 8.e3 0-0 9.Be2 d5 10.Nbd2 Nbd7 11.0-0 Bd6 12.Qc2 Qe7 13.e4 (13.h3 h6=) 13...d4+= 14.g3 g6 15.Rae1 e5 16.Nh4 Ne8 17.Bg4 Ndf6 18.Bh3 Bc8 19.Bc8 Rc8 20.Bc1 Ng7 21.Ng2 Rce8 22.f4 Nd7 (22...Ng4 23.f5=) 23.f5 f6 (23...Qd8 24.Nb3=) 24.g4+= g5 (24...Rd8 25.Nb3+=) 25.h4 h6 26.Nf3 Kf7 27.Kf2 Rh8 28.Rh1 Rh7?? (better is 28...Reg8+=) 29.hg5+– fg5 30.Ng5! (30.Ng5 hg5 31.Rh7+–) 1–0. Nadanian,Ashot – Wang Hao, Internet Chess Club 3m + 0s blitz, 2006.

5.bc6 bc6 6.e3 d5 7.Be2 Nbd7 8.c4 Bd6 9.0-0 0-0 10.d4 Ba6 11.cd5 cd5 12.Ba3 Be2 13.Qe2 Qe7 ½–½. Roselli Mailhe,Bernardo (2410) – Izquierdo,Daniel (2285), Montevideo, 2001.

4.Bb2 d5

5.a4 c5 6.bc6 bc6 7.e3 Ba6 8.Ba6 Na6 9.d4 Bb4 10.c3 Bd6 11.Nbd2 Rg8 (11...Rb8 12.Rb1=) 12.h3 Qc7 13.Qc2 c5 14.Ba3 c4 (14...Rd8!?=) 15.Bd6+= Qd6 16.Ne5 Ke7 17.Qb2 (17.e4 Rgb8+=) 17...Rgb8= 18.Qa3 (18.Qc2!?=) 18...Qa3=+ 19.Ra3 Kd6 (better 19...Rb2 20.Ra1 Rc8–/+) 20.Nf7+= Kc7 21.0-0 Rb2 22.Rd1 Rab8 23.Nf3 (23.Ng5 R8b6+=) 23...Ne4 24.N7e5 (better 24.N7g5!? Nf2 25.Rd2=) 24...Rf2 25.Raa1? (better 25.Ng5 Rbb2 26.Ne4 Rg2 27.Kf1 de4 28.Nc4 Rbf2 29.Ke1–/+) 25...Rbb2–+ 26.Ng4?? (26.Ne1–+) 26...Rg2 27.Kf1 h5 (27...Ng3 28.Ke1 Rge2) 28.Rdb1 (28.Nd2 Rgd2 29.Rd2 Nd2 30.Ke1 hg4 31.hg4–+) 28...Ng3 (28...Rbe2 29.Rb7 Kc8 30.Rb8 Nb8 31.Nf2 Rgf2 32.Kg1 Rg2 33.Kf1 Ng3) 29.Ke1–+ Rbe2 30.Kd1 hg4 31.hg4 Ne4 (31...Rgf2 32.Nh2 Rh2 33.Rb7 Kd8 34.Rb8 Nb8 35.Rb1 Rh1) 32.Rc1 Ref2 (32...Rgf2 33.Ra2 Ra2 34.Rc2 Ra1 35.Rc1 Nc3 36.Ke1 Re2 37.Kf1 Rc1 38.Ne1 Rce1) 33.Ke1 (33.Ra2 Rf1 34.Ne1 Ra2 35.Rc2 Ra1 36.Rc1 Nc3 37.Kd2 Rf2 38.Kc3 Ra3) 33...Ng3 34.Ng1 (34.Kd1 Rf3 35.Rcb1 Rf1) 34…Rf1 0–1. alessandrocarvalhaes (1950) – Soev (2040), lichess.org, 2019.

5.a4 c6 6.c4 cb5 7.cb5 Bb4 8.e3 Qd6 9.Be2 Bd7 (9...Nbd7 10.Ba3=) 10.0-0 0-0 11.Bf6 gf6 12.d4 e5 13.de5 fe5 14.Nbd2 e4 (14...Rc8 15.Rc1=) 15.Nd4+= Bc3 16.Rc1 Bd4 17.ed4 Bf5 18.Bh5 Bg6 19.Nb3 Nd7 20.Nc5 Nc5 21.dc5 Qe5 22.Qg4?? (22.Bg4 f5 23.f4 Qe6+=) 22...d4?? (better is 22...Qh5 23.Qg3 d4–+) 23.Bg6= fg6 24.c6 bc6 25.Rc6 Rac8?? 26.Qd7 Rc6 27.Qc6 d3 28.Qc4 Kg7 29.b6 d2 30.Rd1?? Rd8 31.h3 e3 32.Qc7?? Kh6?? 33.Qe5+– (33...ef2 34.Kf2+–) 1–0. metal – FrankieRivers, caissa.com, 2007.

5.a4 Bd6 6.e3 0-0 7.c4 (7.Be2 Qe7=) 7...c6 8.Nc3 e5 9.cd5 e4 10.Nd4 cd5 11.Be2 Qc7 (11...Be5 12.d3=) 12.Rc1 Bc5 (12...Qd7 13.0-0=) 13.0-0 (13.Nb3!? b6 14.Nc5 bc5 15.d3+–) 13...Bd4= 14.ed4 Qf4 15.f3 (15.d3 e3=) 15...ef3=+ 16.Bf3 Qd4 17.Kh1 Be6 18.Qc2 Qh4 19.Qd3 Increasing the pressure on the isolated pawn on d5 19...Qb4 (19...Rd8 20.Rfe1 Qg5 21.Ne2=+) 20.Nd5= Qb2 21.Nf6 gf6 22.Bb7 Ra7 23.Rc7 Nd7 24.Rd7 Bd7 25.Qd7 Qb4 26.Qc7 Qe4 27.Qg3 (27.Qf7 Kf7 28.Be4 Rd7+–) 27...Qg6 28.Qf3 f5 29.Bc6 Re7 30.Qc3 (30.Qf5?? Qf5 31.Bf3 Rfe8–+) 30...Qd6 31.d4 Qb4 (31...Re2 32.d5+– (worse 32.Qa5 Qd4 33.h3 Ra2=)) 32.Qb4+– ab4 33.Rb1 Rd8 34.d5 b3 35.Kg1 Re4 36.b6 Rb4 37.a5 Rb8 38.Kf2 Kg7 39.Ke3 Kf6 40.Kd3 Ke5 41.Kc3 Re4 42.b7 Re3 43.Kc4 Re2 44.Kb3 Kd6 (44...Re3 45.Kb4 Re2 46.a6+–) 45.a6 Kc7 46.Ra1 Ree8 47.Be8 Re8 48.d6! Kb8 (48...Kd6 49.a7 Passed pawn) 49.d7 Rd8 50.Rc1 Ka7 (50...Rg8 51.Rc8 Ka7 52.b8Q Ka6 53.Rc6 Ka5 54.Qe5) 51.Rc8 Kb6 52.Kb4 Rd7 (52...Ka6 53.b8Q Rc8 54.dc8Q) 53.b8Q Ka6 54.Rc6 1–0. DEFFM – GuestWHGZ, freechess.org, 2018.

5.a4 Nbd7 6.e3 Bd6 7.Be2 Nb6 0–1. chessclub (2280) – pigjones (2425), net–chess.com, 2012.

5.c4 c6?! 6.e3 Nbd7.

5.c4 Be7 6.e3 Nbd7 7.Be2 0-0 8.0-0 c5 9.bc6 bc6 10.Nc3 Ba6 11.cd5 cd5 12.Ba6 Ra6 13.a4 Qb8 14.Nb5 Bb4 15.Rc1 Rc8 ½–½. pcmvr – iamachessstudent, net–chess.com, 2018.

5.d3 Nbd7 6.Nbd2 Be7 (6...Nc5 7.c4=) 7.g3 0-0 8.Bg2 Nb6 (8...c6 9.bc6 bc6 10.0-0=) 9.a4 Nfd7 10.0-0 f5 11.c4 Bf6 (11...dc4 12.Nc4 Nc4 13.dc4+=) 12.Bf6+– Qf6 (12...Nf6 13.Qc2+–) 13.Qc2 Qe7 14.Rfc1 dc4 (14...Nf6 15.c5 Nbd7 16.Nb3+–) 15.Nc4+– Nd5 (15...Nf6 16.Nfe5+–) 16.Ne3 N7f6 (16...Ne3 17.fe3 Nf6 18.Ne5+–) 17.Nd5 Nd5 (17...ed5 18.Qc7 Rf7 19.Qc5+–) 18.Ne5 Qd6 (18...f4 19.d4+–) 19.Nc4 (19.f4 c6 20.bc6 Nb4+–) 19...Nb4 (19...Qd8!?+–) 20.Qc3+– Qe7 21.Ne5 c6 22.bc6 bc6 23.Nc6 Nc6 24.Bc6 Bb7 25.Bb7 Qb7 26.Qe5 Qd5 27.Qd5 ed5 28.Rc5 Rfe8 (28...d4 29.Rd5+–) 29.Kf1 Red8 (29...Kf7 30.Rb1 Rad8 31.Rb7 Re7 32.Re7 Ke7 33.f3+–) 30.Rb1 Ra6 (30...Rd7 31.Rbb5 Rad8 32.Ra5+–) 31.Rbb5 Rh6 (31...Kf7 32.Rd5 Rd5 33.Rd5+–) 32.h4 (32.Rd5 Rc8 33.Rdc5 Re8 34.Rf5 Rh2+–) 32...f4 (32...Rhd6 33.Ra5 R6d7 34.Rab5+–) 33.Rd5 Rf8 (33...Re8 34.Re5 Rc8 35.Ra5 fg3 36.fg3+–) 34.Rf5 1–0. Valenta,Vit – Koudela,J (1955), Morava–ch U20, 1992.

5.e3 Bc5 6.Be2 0-0 7.0-0 Bd6 8.d3 Ng4 9.h3 Nf6 10.Nbd2 e5 (10...Nbd7 11.c4=) 11.c4 (better 11.Be5 Be5 12.Ne5+–) 11...Bh3? (better 11...Re8=) 12.gh3+– Qd7 (12...Re8 13.cd5 Nd5 14.Qb3+–) 13.Kg2 (13.Ne5 Qh3 14.cd5 Nbd7+–) 13...e4?! (13...Qe6+–) 14.de4 de4 15.Nh2 (15.Ng5!? Qf5 16.Bf6 Qg6+–) 15...Bh2 (15...Qe6 16.Bf6 gf6 17.Qc2+–) 16.Kh2 (16.Bf6 gf6 17.Kh2 Qd6 18.Kh1 Qe6 19.Rg1 Kh8+–) 16...Qf5 (16...Re8 17.f3+–) 17.Bg4 (17.Bf6 gf6 18.f3 ef3 19.Bf3 Qe5 20.Kg2 c6+–) 17...Qg5 (17...Ng4 18.Qg4 (18.hg4?! Qe6+–) 18...Qg4 19.hg4+–) 18.Bf6 gf6 (18...Qf6 19.Ne4 Qe5 20.Ng3+–) 19.Ne4 Qe5 20.Ng3 Kh8 (20...Re8 21.Bf5+–) 21.Qd4 (21.Bf5 Rg8+–) 21...Qg5 (21...a4 22.Rad1 Rg8 23.Bf5 Qd4 24.Rd4+–) 22.f4 Qg7 23.Nf5 Qg6 24.Ne7 (better 24.e4 c5 25.Qc3+–) 24...Qc2 (24...Qg7+–) 25.Kh1 h6 26.Qf6 Kh7 27.Bf5 Qf5 28.Qf5 (28.Nf5 Rg8 29.Qh6) 28...Kg7 (28...Kh8 29.Qf6 Kh7 30.Nf5 Rg8 31.Qh6) 29.Rg1 Kh8 30.Qf6 Kh7 31.Qg7 1–0. e4_e5_f4 (1650) – AvnishKumar (1650), lichess.org, 2020.

5.e3 c6 6.a4 c5 7.c4 dc4 (7...Bd6 8.d4=) 8.Bc4+= b6 9.Qb3 (9.d4 Bb7+=) 9...Be7 (9...Bb7 10.d4=) 10.0-0 Nbd7 11.Ng5 (11.d4 Bb7=) 11...Ne5 1–0. DEFFM – GuestRXDW, freechess.org, 2018.

5.e3 c6 6.a4 Bd6 7.Be2 Bd7 (7...0-0 8.0-0=) 8.Ne5 (8.Be5 Ne4 9.0-0 cb5 10.ab5 0-0=) 8...Bc8 (8...0-0 9.0-0=) 9.0-0 (9.f4 0-0=) 9...Qc7 (9...0-0 10.f4=) 10.f4 Nbd7 (10...0-0 11.c4=) 11.Nd7 Qd7 (11...Bd7 12.Rf3=) 12.Bd3 (12.Be5 c5+=) 12...Be7 (12...Qe7 13.Be5=) 13.Qf3 (13.Be5 0-0+=) 13...0-0= 14.Qg3 (14.Be5 Ne4=) 14...Qd8 (14...c5 15.Be5=) 15.Na3 (15.Be5 cb5 16.ab5 a4+=) 15...g6 (15...Bb4 16.Rad1=) 16.Qg5 (16.Rab1 c5=) 16...Ne8 (16...Bd7 17.Qe5+=) 17.Qh6+= Bf6 18.Be5 Be5 (18...Qe7 19.Rf3 Be5 20.Rh3+=) 19.fe5 Ng7? (better 19...Qe7+=) 20.Rf3+– Nf5?? (better 20...f5 21.Rh3 Qc7 22.Qh7 Kf7+–) 21.Bf5 ef5 (21...Qe7 22.Rh3 f6 23.Bg6 Qg7 24.Bh7 Kh8 25.Bd3 Qh6 26.Rh6 Kg7 27.Rg6 Kh7 28.ef6 e5 29.bc6 bc6+–) 22.Rh3 (22.Rh3 Qh4 23.Rh4 Rd8 24.Qh7 Kf8 25.Qh8 Ke7 26.Qf6 Ke8 27.Rh8 Kd7 28.Qf7) 1–0. DEFFM – DustCam, freechess.org, 2018.

5.e3 c6 6.a4 Bd7 7.c4 dc4 8.Bc4 cb5 9.ab5 b6 10.Ne5 Be7 (10...Bd6 11.0-0+–) 11.Qf3 Ra7 12.0-0 Qc7 (12...0-0 13.Nc3+–) 13.Rc1 Qb7 14.Qg3 0-0 15.Ng4 (15.Nc3 Rc8+–) 15...Ne4?? (better 15...Ng4 16.Qg4 e5+–) 16.Nh6 (16.Nh6 Kh8 17.Qg7) 1–0. DEFFM – GuestHRSR, freechess.org, 2019.

5.e3 c6 6.c4 Nbd7 7.a4 Bb4 8.Be2 0-0 9.0-0 cb5 10.cb5 Nc5 11.d3 Bd7 (11...Ncd7 12.Ba3+=) 12.Nbd2 (12.Nc3 Qe7+=) 12...Rc8= 13.Bf6 Qf6 14.d4 Ne4 15.Ne4 de4 16.Ne5 Qe7 17.f3 Rc3 18.fe4 (worse is 18.Nd7 Qd7 19.Kf2 Qe7–/+) 18...Re3 19.Bf3 (worse is 19.Nd7 Qd7 20.d5 Re4 21.de6 Qe6–/+) 19...Rd8 20.Rc1 Be8 21.Nc4 (better is 21.Ng4!? Rc3 22.Rc3 Bc3 23.d5=) 21...Rc3–/+ 22.Kh1 Qc7 23.Be2 Rc1 24.Qc1 Rd4 25.e5 b6 26.Rf4?? (better is 26.Qc2+=) 26...Bd2!–+ 27.Qb2 (27.Nd2 Qc1 Double attack (27...Qc1 Pinning; 27...Qc1 Deflection; 27...Rf4 Decoy; 27...Rf4 Interception)) 27...Rf4 (worse is 27...Bf4 28.Qd4 Bg5 29.Qb6 Qb6 30.Nb6+/–) 28.Qd2 Rc4 (28...Rc4 29.Bc4 Qc4–+) 0–1. Petukhov,Nikolay (1815) – Pimenov,Revolt (2180), Obninsk op, 2009.

5.e3 Bd7 6.Bd3 Bd6 7.Nc3 (7.Be5 0-0=) 7...0-0 8.0-0 Ng4 (8...e5 9.Be2+=) 9.h3 Nh6 (9...Nf6 10.Ne2=) 10.e4+= c6 11.Re1 Qc7 12.Qe2 e5? (better is 12...a4+=) 13.ed5+– Re8 (13...cb5 14.Nb5 Bb5 15.Bb5 Qc2 16.Be5 Be5 17.Qe5+–) 14.dc6 Bh3?? (14...bc6 15.Ne4 Nf5+–) 15.cb7 (worse is 15.gh3 bc6 16.Ne4 f6+–) 15...Qb7 (15...Ra7 16.gh3 Rb7 17.Be4+–) 16.Be4 Qc8 17.Ba8 Bg2 18.Kg2 Qg4 19.Kh1 Qh3 20.Nh2 e4 21.f4 Bf4 22.Ne4 Ng4 23.Nf6! gf6 24.Qg4 Qg4 25.Re8 (25.Re8 Kg7 26.Ng4+–) 1–0. marre – lomoff, internet, 2010.

5.e3 Qe7 6.Ba3+= Qd8 7.Bf8 Kf8 8.c4 Ne4 (8...c5 9.d4+=) 9.Qc2 Qf6 (9...Nd7 10.d4+–) 10.d4+– c6 11.Bd3 Ng5 (11...Nd6 12.Nbd2+–) 12.Nfd2 dc4? (better 12...e5 13.cd5 ed4+–) 13.Nc4+– (13.Bc4?! e5 14.de5 Qe5+=; 13.Qc4?! e5 14.h4 Ne6+–) 13...c5 (13...Qd8 14.h4 e5 15.hg5 ed4+–) 14.Nb6 cd4 (14...Nd7 15.Na8 e5+–) 15.Qc8 Ke7 16.Qb7 Nd7 (16...Ke8 17.Na8 Nd7 18.f4+–) 17.Nd7 de3 18.Nf6 Kf6 19.fe3 Rab8 20.Rf1 Nf3 21.Rf3 Kg5 1–0. BlackDemon (2610) – Kabarote, FICS rated standard game, 2013.

5.e3 Be7 6.c4 0-0 7.Be2 c6 8.Nc3 Bd7 9.d4 (9.cd5 Nd5 10.Nd5 ed5 11.bc6 Nc6=) 9...cb5 (9...dc4 10.bc6 Bc6 11.Bc4=) 10.cb5 Qb6 (10...a4 11.a3= (11.Na4? Qa5 12.Nc3 Ne4–+)) 11.0-0+= Ne4 (11...Rc8 12.Rc1+=) 12.a4 (12.Ne4 de4 13.Ne5 a4+=) 12...Nc3 13.Bc3 f6 (13...Rc8 14.Qd2+=) 14.Qd2 (14.Rc1 Ba3 15.Rc2 Be8+=) 14...Bd6 15.Bd3 (15.Rfc1 Be8+=) 15...Be8 (15...Rc8 16.Rac1+=) 16.Qc2 h6 17.Bb2 Nd7 18.Rac1 Bh5 19.Nd2 Rfe8 (19...f5 20.Nb3+=) 20.Nb3 Qd8 21.f3 Kh8 (21...Nb6 22.Nc5 Rc8 23.Qb3+=) 22.Qd2 (22.Qb1 Qb8 23.h3 Nb6+=) 22...e5 (22...Nb6 23.Bc3 Na4 24.Ba5+=) 23.Bf5 (23.de5 Ne5 24.Bb1 Nc4+=) 23...ed4 (23...Nb6 24.Na5 Qe7 25.Bc2+/–) 24.Bd4 Ne5 25.Qf2 (25.Rc2 Nc4 26.Qd3 Qe7+=) 25...Nc4 26.Rfd1 (26.Nd2 Bf7+=) 26...Qe7 27.Qh4 Qf7 (27...Bf7 28.Rd3+=) 28.e4 de4 (28...Ba3 29.Ra1 de4 30.Be4+=) 29.Be4 Ba3 30.Rc3 Bb2 31.Rcd3 Re4 32.Qe4 (worse is 32.fe4 Bd1 33.Rd1 Ne3–/+) 32...Bg6 33.Qe1 (33.Qg4 Re8=) 33...Bd3 34.Rd3 Qg6 35.Qe2 Re8 36.Qc2 Na3 (36...Bd4 37.Nd4 Re1 38.Kf2=) 37.Qd1 (37.Qb2?? Qd3 38.h3 Nc4–+) 37...Nc4 38.Qc2 (38.Bf2 Be5 39.Rd7 Nb2=) ½–½. Malmstroem,Jan – Lacassagne,Jean, corr TKM/A008, 1999.

5.e3 Be7 6.d4 Nbd7 7.Nbd2 c5 8.c4 dc4 9.Nc4 cd4 10.ed4 Bb4 11.Nfd2 Nb6 12.a3 Bd2 13.Qd2 0-0 14.Bd3 Nc4 15.Bc4 b6 16.0-0 Bb7 17.Rfe1 Bd5 18.Bd3 Qd6 19.Re5 Rfc8 20.Rae1 g6 21.Qg5 Nd7 22.R5e3 Rc7 23.h4 f6 24.Qh6 Qf8 25.Qf4 Rac8 26.h5 g5 27.Qg3 h6 28.Re6 Be6 29.Re6 Qf7 30.Qg4 Nf8 31.Rb6 Rc1 32.Bc1 Rc1 33.Bf1 Qc4 34.Rf6 Qf1 35.Kh2 Qh1 36.Kg3 Rc3 37.Rf3 Rf3 38.Kf3 Qc1 39.Qe4 Qa3 40.Kg4 Qd6 41.g3? (better is 41.Qe5 Qd7 42.Kf3–/+) 41...Qd7–+ 42.Qf5 a4 43.b6 Qf5 (43...Qd4 44.f4 Qd1 45.Kh3 Qh5 46.Kg2 Qe2 47.Kh3 Qf1 48.Kh2 Qf2 49.Kh3 Qb6 50.fg5 a3–+) 44.Kf5 Nd7 45.b7 a3 46.Ke6 Nb8 47.Kd6 a2 48.Kc7 Na6 49.Kb6 a1Q 50.d5 Qe5 51.Ka6 Qb8 52.Kb6 Kf7 53.Kc6 Ke7 54.Kb6 Qd6 55.Ka7 Qc7 56.f4. Kossobudzki,Robert – Rajlich,Iweta, Memorial Anderssena Wroclaw Poland (year?). (=1.Nf3 Nf6 2.b4 a5 3.b5 e6 4.e3 d5 5.Bb2 Be7)

5.e3 Be7 6.Be2 0-0 7.0-0 c5 8.bc6 bc6 9.c4 Ba6 10.d4 Nbd7 11.Ba3 Nb6 12.Ne5 Rc8 13.Be7 Qe7 14.c5 Be2 15.Qe2 Nbd7 16.Nd7 Qd7 17.Nc3 Qc7 18.f4 Nd7 19.e4 de4 20.Ne4+= Nf6 21.Nf6+/– gf6 22.Rad1 f5 23.Rd3 Qe7 24.Qe5 f6 25.Qe1 Ra8 26.Qc3 Rfd8 27.Re1 Rd5 28.Rg3 Kf7 29.Qf3 Rg8 30.Qh5+– Kf8 31.Qh6 Rg7 32.Rge3 e5 33.fe5 fe5 34.Re5 Re5 35.Re5 Qd7 36.Qf6 Kg8 37.Rf5 h6 38.h3 Kh7 39.Rf4 Qd5 40.Qf5 Qf5 41.Rf5 Rd7 42.Rf4 Kg6 43.Kf2 Rb7 44.Ke3 a4 45.d5 cd5 46.Ra4 Rb2 47.Kd4 Kf6 48.Kd5 Rg2 49.Rf4 Ke7 50.a4 Kd8 51.Kc6 Rg6 52.Kb7 Rg7 53.Kb6 Kc8 54.c6 Rg8 55.Rf7 h5 56.Ra7 (56...Kb8 57.c7 Kc8 58.Ra8 Kd7 59.Rg8 Ke6 60.c8Q Ke5 61.Qc5 Kf4 62.Qf2 Ke4 63.Re8 Kd3 64.Kc5 h4 65.Re3#) 1–0. Vokac,Marek (2450) – Polak,Tomas (2410), Plzen, 1992.

5.e3 g6 6.c4 dc4 (6...Nbd7 7.cd5 ed5 8.Nc3=) 7.Bc4 Bg7 (7...Nbd7 8.0-0+=) 8.0-0 0-0 9.a4 (9.d4 Nd5+=) 9...b6 10.Nc3 Bb7 11.Ne5 c5= 12.d4 cd4 13.ed4 Nbd7 14.f4 Rc8= 15.Qb3? Re8 16.Rad1= Nf8 17.d5 ed5 18.Bd3?? d4?? 19.Ne2?? Ne4?? 20.Be4 Be4 21.Rd4 Qe7 22.Re4 Be5 23.Re5 Qc7 24.Re8 Re8 25.Nd4 Nd7 26.Nc6 Nc5 27.Qc3 f5 28.Qh8 Kf7 29.Qh7 Ke6 30.Qc7 Kd5 31.Rd1 Kc4 32.Qf7 Re6 (33.Nd4 Kb4 34.Ne6 Ne6 35.Qe6 g5 36.Rd4 Kc5 37.Qf5#) +–. bby – Putte16, Live Game Caissa's Web, 2004.

5.g3 a4 A) 6.a3 A1) 6...Nbd7 7.Bg2 (7.d3 c6 8.bc6 bc6 9.Bg2; 7.Nc3 e5 8.Bg2 Bd6 9.0-0) 7...Ra5 8.Nc3 e5 9.e3; A2) 6...Bc5 7.e3 0-0 8.d4 Be7 9.c4; A3) 6...Bd6 7.Be5 (7.c4 dc4 8.Qc2 e5 9.Be5; 7.e3 0-0 8.c4 dc4 9.Bc4) 7...0-0 8.d4 Be5 9.Ne5; B) 6.c4 B1) 6...dc4 7.e3 (7.Qc2 a3 8.Be5 Nbd7 9.Bg2; 7.Qc1 Qd5 8.Bf6 gf6 9.Nc3) 7...Bd6 8.Bc4 0-0 9.0-0; B2) 6...Bd6 7.Qc1 (7.cd5 ed5 8.Bg2 0-0 9.0-0; 7.Qc2 a3 8.Be5 Be5 9.Ne5) 7...Nbd7 8.Bg2 0-0 9.0-0; B3) 6...a3 7.Bd4 (7.Bf6 Qf6 8.Nc3 d4 9.Ne4; 7.Be5 Nbd7 8.e3 Ne5 9.Ne5) 7...c5 8.Be3 dc4 9.Qc1; C) 6.e3 C1) 6...Bd6 7.Be5 (7.Be2 Nbd7 8.0-0 e5 9.Ba3; 7.c4 0-0 8.Be5 Be5 9.Ne5) 7...Be5 8.Ne5 Nbd7 9.d4; C2) 6...Be7 7.Be2 (7.a3 0-0 8.c4 Nbd7 9.Bf6; 7.Bd3 a3 8.Be5 0-0 9.Nc3) 7...0-0 8.0-0 a3 9.Bf6; C3) 6...Nbd7 7.c4 (7.Be2 Bd6 8.0-0 e5 9.Ba3; 7.Bg2 Bd6 8.Nd4 Nb6 9.0-0) 7...a3 8.Bc3 Bd6 9.d4.

5.g3 Bc5 A) 6.Bg2 A1) 6...0-0 7.0-0 (7.d4 Bb4 8.c3 Bd6 9.Ba3) 7...c6 8.Nc3 Qb6 9.d4; A2) 6...Nbd7 7.0-0 (7.d4 Bb4 8.c3 Be7 9.0-0) 7...0-0 8.d4 Bb4 9.Qd3; A3) 6...c6 7.d4 (7.bc6 Nc6 8.0-0 0-0 9.Ba3; 7.Ba3 Bb6 8.bc6 Nc6 9.0-0) 7...Bb4 8.c3 Be7 9.bc6; B) 6.e3 B1) 6...0-0 7.d4 Bd6 8.Ba3 Ba3 9.Na3; B2) 6...Nbd7 7.d4 (7.Bg2 0-0 8.d4 Bb4 9.c3; 7.Be2 0-0 8.d4 Bb4 9.c3) 7...Bd6 8.c4 dc4 9.Bc4; B3) 6...a4 7.Be2 (7.d4 Bb4 8.c3 a3 9.Bc1; 7.a3 0-0 8.d4 Be7 9.c4) 7...Nbd7 8.0-0 Bd6 9.Nd4; C) 6.d4 C1) 6...Be7 7.e3 (7.Ba3 Ba3 8.Na3 Qd6 9.Qc1; 7.Bg2 Bd7 8.a4 c6 9.Nc3) 7...0-0 8.Bd3 c6 9.Ba3; C2) 6...Bf8 7.e3 a4 8.a3 c6 9.c4; C3) 6...Bd6 7.e3 (7.Qd3 c5 8.dc5 Bc5 9.Bg2; 7.Ba3 Ba3 8.Na3 Qd6 9.Qc1) 7...Ne4 8.Bd3 0-0 9.0-0.

5.g3 c6 6.e3 (6.a4 A) 6...Bd7 7.e3 (7.Nc3 Bc5 8.e3 0-0 9.Ne5) 7...Be7 8.Nc3 0-0 9.Ne5; B) 6...cb5 7.ab5 Bd6 8.Na3 Nbd7 9.Bg2; C) 6...Bc5 7.Ba3 (7.e3 0-0 8.d4 Bb4 9.c3; 7.d4 Bb4 8.c3 Be7 9.Ba3) 7...Bb6 8.d4 Ne4 9.e3; 6.Nc3 Bd6 7.bc6 (7.Rb1 e5 8.bc6 bc6 9.Bg2; 7.Bg2 e5 8.bc6 bc6 9.0-0) 7...bc6 8.Bg2 0-0 9.0-0) 6...Bd6 (6...Be7 7.Ne5 (7.Nc3 0-0 8.Rb1 Bd6 9.Bg2; 7.h3 0-0 8.Nc3 Nbd7 9.Bg2) 7...0-0 8.Be2 cb5 9.Bb5) 7.Nc3 (7.Be5 0-0+= 8.d4 Ne4 9.Bd6; 7.Ne5 0-0 8.f4 Ne4 9.d3; 7.d4 cb5 8.Bb5 Bd7 9.Bd3) 7...0-0 (7...e5 8.bc6 bc6 9.Rb1) 8.Bg2 (8.bc6 bc6 9.Rb1) 8...e5 9.0-0 Re8 10.d3 a4 11.Rb1 Qa5 12.Ba1 Nbd7 13.bc6 bc6 14.Ne2 Ba6 15.Bc3 Qc7 16.Qd2 Nc5 (16...Rab8 17.Nh4+=) 17.Bb4 (17.Nh4 Bc8+=) 17...e4–/+ 18.Bc5 Bc5 19.Nfd4 Bb6 20.Rfc1 Ba5 21.Qd1 Red8 22.Rb2 c5 23.Nb5 Qe7 24.a3 c4 25.Rcb1 (25.Ned4!?+=) 25...Bb5–/+ 26.Rb5 cd3 (26...Qa3?! 27.Ra1 Qe7 28.Ra4+=) 27.cd3 Qa3 28.Nd4 Bc3 (28...ed3 29.Nc6 Qc3 30.Nd8 Bd8 31.Rb8+/–; 28...Qd3?! 29.Qd3 ed3 30.Nc6=) 29.Nc6 Rdc8 30.Bh3 Rc6 (30...Re8!?–/+) 31.Rb8 Qf8 32.Rf8 Kf8 33.de4 a3 (worse is 33...de4 34.Bd7 Rca6 35.Bb5+=) 34.Qc2 de4 35.Qa2 Rd6 (35...Be5 36.Kg2+=) 36.Rb7 Rd1 37.Bf1 Nd7 38.Rc7 Bb2 39.Kg2 Ne5 40.Bc4 (40.Bb5!?+=) 40...Rc1–/+ (40...Nc4 41.Qc4 Kg8 42.Rf7+–) 41.Bd5 Rc7 42.Ba8 f5 43.Qe6 g6 44.Bd5 (44.Qd6 Re7+=) 44...Kg7–/+ 45.Qg8 Kh6 46.Qf8 Rg7 47.Be6 ½–½. Karl Gill – muess26, ChessWorld.net, 2009.

5.g3 Bd6 A) 6.a4 A1) 6...0-0 7.Bg2 Nbd7 8.Ba3 Ba3 9.Na3; A2) 6...Nbd7 7.Bg2 (7.Ba3 Qe7 8.Bg2 e5 9.0-0; 7.Bh3 0-0 8.0-0 e5 9.Bg2) 7...e5 8.Ba3 e4 9.Nd4; A3) 6...Qe7 7.Bg2 (7.Ba3 0-0 8.d4 Ne4 9.Bd6; 7.Be5 Nbd7 8.Bd6 Qd6 9.Bg2) 7...e5 8.Ba3 0-0 9.0-0; B) 6.Bg2 B1) 6...c6 7.a4 (7.Na3 e5 8.0-0 e4 9.Nd4; 7.bc6 Nc6 8.Na3 e5 9.Nb5) 7...cb5 8.ab5 Bd7 9.Nc3; B2) 6...Qe7 7.Ne5 (7.0-0 e5 8.c4 dc4 9.Qc2) 7...0-0 8.0-0 a4 9.e3; B3) 6...0-0 7.0-0 Nbd7 8.d4 Nb6 9.Ne5.

5.c4 dc4

6.e3 Qd5 7.Qc2 Qb5 8.Bf6 gf6 9.Bc4 =+.

6.e3 Nbd7 7.Bc4= Nb6 8.Qc2 Bb4 9.0-0 Nc4 10.Qc4 0-0 11.d4 Bd7 12.Nc3 Ne8 13.a4 Nd6 14.Qd3 Bc3 15.Bc3 c6 16.Ne5 cb5=+ 17.Nd7 Qd7 18.ab5 Qb5 19.Qb5 Nb5 20.Ba5 Rfc8 21.Rfc1 Rc1–/+ 22.Rc1 Kf8 23.Bb4 Ke8 24.g4 Kd7 25.Bc5 Ra2 26.Kg2 Rd2 27.Rb1 Kc6 28.Rc1 Kd7 29.h4 Ra2 30.Kg3 f6 31.f4 Nc7 32.Kf3 b5 33.Rb1 Kc6 34.Ke4 Nd5= 35.Kf3 Rh2 36.Ra1 Rh3–/+ 37.Kf2 Ne3 38.Ra6 Kd5 39.Rd6 Kc4 40.Re6 Ng4 41.Kg2 Rc3 42.Rb6 Ne3 43.Kf2 Nf5 44.h5 Nd4 45.Bd4–/+ Kd4 46.Rb5 Ke4 47.h6 (47.Rb4!? Kd5 48.Rb8–/+) 0–1. Spiegel,M – Rossbach,Werner, corr SOK–88–21, 1988.

6.e3 Nbd7 7.Bc4 Nb6 8.Qc2?! Bb4?! 9.Be2 Nc4 10.Qc4 0-0.

6.e3 Nbd7 7.Bc4 Nb6 8.Qc2?! Nc4?! 9.0-0.

6.e3 Nbd7 7.Bc4 Nb6 8.Be2?! Nc4?! 9.0-0.

5.e3 b6

6.c4 A) 6...c6 A1) 7.bc6 Nc6 8.cd5 Nd5 9.Nc3 Nc3 10.Bc3 Bd7; A2) 7.cd5 cd5 (7...Nd5 8.e4 Nc7 9.Nc3 Bd7 10.bc6 Nc6; 7...ed5 8.bc6 Nc6 9.Bb5 Bd7 10.Bf6 Qf6) 8.Bd3 Nbd7 9.Bc2 Bd6 10.d4 Qe7; A3) 7.Be5 Bd6 (7...cb5 8.cd5 Nd5 9.Bb5 Bd7 10.Bc4 Nc6; 7...Bb7 8.cd5 cd5 9.d4 Nbd7 10.Bf4 Bb4; 7...Nfd7 8.Bf4 dc4 9.Nc3 Bb4 10.Bc4 0-0; 7...c5 8.Nc3 Nbd7 9.Bg3 Be7 10.cd5 Nd5) 8.bc6 Nc6 9.Qa4 Bb7 10.cd5 ed5; A4) 7.Nc3 Bb7 (7...Bd6 8.bc6 Nc6 9.cd5 ed5 10.Bb5 Bb7) 8.Rc1 dc4 9.Bc4 Bd6 10.0-0 0-0; B) 6...Bd6 B1) 7.Be5 Nbd7 (7...Bb7 8.cd5 Bd5 9.Nc3 0-0 10.Rc1 Be5; 7...0-0 8.d4 Bb4 9.Nbd2 Nbd7 10.Bf6 Nf6) 8.Bd6 cd6 9.d4 dc4 10.Bc4 Bb7; B2) 7.Bf6 Qf6 8.Nc3 dc4 9.Bc4 Bb7 10.d4 c5; B3) 7.d4 0-0 (7...Bb7 8.cd5 Nd5 9.Nc3 a4 10.a3 Nc3; 7...c6 8.Ne5 Bb7 9.cd5 Nd5 10.Bd3 Qh4) 8.Bd3 dc4 9.Bc4 Bb7 10.0-0 c6; B4) 7.Be2 0-0 (7...dc4 8.Na3 c3 9.dc3 a4 10.Nc4 a3; 7...Bb7 8.cd5 Nd5 9.0-0 0-0 10.d4 c6; 7...c6 8.cd5 cd5 9.0-0 0-0 10.Be5 Ne4; 7...c5 8.d4 0-0 9.dc5 Bc5 10.0-0 Bb7) 8.0-0 Bb7 9.d4 c6 10.Nc3 dc4.

6.Be2 Bb4 A) 7.Ne5 0-0 (7...Bb7 8.a3 Bd6 9.0-0 0-0 10.f4 c5; 7...Nfd7 8.0-0 0-0 9.a3 Bd6 10.f4 c5; 7...Bd6 8.0-0 0-0 9.c4 Bb7 10.d4 c5; 7...a4 8.0-0 0-0 9.d4 a3 10.Bc3 Bd6) 8.0-0 Bb7 9.f4 c6 10.a3 Bd6; B) 7.a3 Bd6 (7...Be7 8.Ne5 0-0 9.0-0 Bb7 10.f4 Ne4) 8.0-0 0-0 9.Ne5 Bb7 10.f4 c5; C) 7.Be5 Nbd7 (7...Nfd7 8.Bg7 Rg8 9.Bb2 Rg2 10.Nc3 a4) 8.0-0 Ne5 9.Ne5 0-0 10.d4 Bd6; D) 7.0-0 0-0 (7...Bb7 8.Nc3 0-0 9.a3 Bd6 10.Nd4 c5; 7...Bd6 8.Be5 0-0 9.d4 c5 10.Nbd2 Be5) 8.a3 Bd6 9.Ne5 c5 10.f4 Bb7.

6.Be2 Bb7 7.0-0 Be7 8.d3 0-0 9.h3 (9.c4 dc4 10.dc4 a4=) 9...c5 (9...Nbd7 10.Nd4=) 10.c4 dc4 (10...Bd6 11.Nc3=) 11.dc4 Qd1 (11...Nbd7 12.Nc3=) 12.Rd1+= Nbd7 (12...Ne4 13.Nc3+=) 13.Nbd2 (13.Ne5 Ne5 14.Be5 a4+=) 13...Rfd8= 14.Bd3 Bf8 (14...a4 15.a3=) 15.Bc2 (15.e4 Nh5=) 15...g6 (15...Bd6 16.e4 Bf4 17.e5+=) 16.Ne5 (16.Bc3 Bg7+=) 16...Ne5 17.Be5 Bg7 18.f4 (18.Rac1 Ne8 19.Bg7 Kg7=) 18...Rac8 (18...Rd7 19.Nf3=) 19.Rab1 (19.g4 h6+=) 19...Rd7 (19...h6 20.g4+=) 20.Bf6 (20.Nb3 Ra8=) 20...Bf6= 21.Ne4 Be7?? (better 21...Be4 22.Be4 Rcd8 23.Rd7 Rd7=) 22.Rd7+– (22.Rd7 Be4 23.Be4+–) 1–0. DEFFM – GuestGHGP, freechess.org, 2016.

6.Be2 Bd6 A) 7.Be5 0-0 (7...c6 8.Nc3 Ne4 9.Bd6 Qd6 10.Na4 Nd7; 7...Bb7 8.0-0 0-0 9.d4 c5 10.Nbd2 a4; 7...Nbd7 8.Bd6 cd6 9.0-0 0-0 10.d4 e5; 7...a4 8.0-0 0-0 9.d4 c5 10.c4 dc4) 8.d4 c6 9.Bd6 Qd6 10.Nc3 Nbd7; B) 7.a3 0-0 (7...c5 8.bc6 Nc6 9.Nc3 e5 10.Nb5 Bg4; 7...c6 8.0-0 0-0 9.Nc3 e5 10.d4 e4; 7...Bb7 8.0-0 0-0 9.Be5 Be5 10.Ne5 c5; 7...Nbd7 8.Nd4 0-0 9.0-0 Qe8 10.Nc6 Bb7) 8.0-0 c5 9.bc6 Nc6 10.Nc3 e5; C) 7.Ne5 0-0 (7...Bb7 8.0-0 0-0 9.f4 c5 10.bc6 Nc6; 7...Nfd7 8.Nd7 Bd7 9.0-0 0-0 10.f4 Qe8; 7...a4 8.f4 Ne4 9.0-0 f6 10.d3 Nc5) 8.0-0 c5 9.f4 Bb7 10.c4 Nfd7; D) 7.0-0= 0-0 (7...c6 8.Nc3 a4 9.bc6 a3 10.c7 Bc7; 7...c5 8.bc6 Nc6 9.Na3 0-0 10.Nb5 e5; 7...Bb7 8.Be5 0-0 9.d4 c5 10.Nbd2 a4) 8.Be5 c6 9.Bd6 Qd6 10.bc6 Nc6.

6.Be2 Bd7 7.c4 (7.0-0 Bd6= (7...Be7 8.Nc3 Bd6 9.Na4 0-0 10.c4 Ra7; 7...c6 8.Nc3 Bd6 9.bc6 Nc6 10.Nb5 Be7; 7...Bb4 8.Be5 0-0 9.a3 Be7 10.c4 dc4) 8.Be5 Be5 9.Ne5 c6 10.a4 0-0; 7.Ne5 Bd6 (7...Be7 8.0-0 0-0 9.c4 c6 10.Nc3 dc4; 7...c6 8.c4 Be7 9.cd5 ed5 10.Nc3 c5; 7...Bb4 8.0-0 0-0 9.c4 c6 10.Nd7 Nfd7; 7...c5 8.Bh5 Nh5 9.Qh5 Qe7 10.Na3 Bc8) 8.0-0 0-0 9.c4 a4 10.Na3 Qe7; 7.Be5 Ne4 (7...c6 8.Nc3 Ne4 9.Ne4 de4 10.Nd4 c5; 7...Ng4 8.Bf4 Be7 9.Nc3 0-0 10.0-0 a4; 7...Be7 8.0-0 0-0 9.c4 dc4 10.Bc4 c6) 8.d3 Nd6 9.c4 f6 10.Bb2 Be7; 7.a4 Bd6 (7...Be7 8.Be5 0-0 9.0-0 c6 10.Nc3 Ne4; 7...Bb4 8.0-0 0-0 9.Be5 Ng4 10.Bf4 Nf6; 7...Bc5 8.Be5 0-0 9.d4 Be7 10.0-0 Ng4; 7...c6 8.0-0 Bd6 9.Be5 Be5 10.Ne5 cb5) 8.Be5 Qe7 9.0-0 0-0 10.d4 Rc8) 7...dc4 (7...c6 8.Ne5 dc4 9.Bf3 Bd6 10.Nc4 Bc5; 7...Bd6 8.Ne5 0-0 9.0-0 a4 10.Na3 Qe7) 8.Bc4 Be7 (8...c6 9.Nc3= Bb4 10.Rb1 0-0) 9.Ne5+= 0-0 (9...c6 10.Qf3 Qc7) 10.0-0 (10.Qf3 Ra7) 10...Qe8 (10...Bc8 11.d4+=; 10...Ra7+=) 11.Qf3 c5?? (better is 11...Ra7 12.a4 c6+=) 12.Qa8+– Bb5 13.Nc3 Bc4 14.Nc4 Qd8 (14...Nbd7 15.Qc6+–) 15.Qf3 Nbd7 16.a4 (16.Rab1 Qb8+–) 16...Qb8 17.Nb5 Nd5 (17...Qa8 18.Qa8 Ra8 19.Rad1+–) 18.Rfd1 Nb4 19.d4 Qc8 (19...Bf6 20.Rd2+–) 20.dc5 Nc5 (20...Bc5 21.Rac1+–) 21.Nb6 Qa6 (21...Qc6 22.Qc6 Nc6 23.Nd7 Nd7 24.Rd7+–) 22.Nd7 Rd8 (22...Nd7 23.Rd7 Nd5+–) 23.Nc5 Rd1 24.Rd1 Bc5 25.Rd7 Bf8 (25...h5 26.Qf7 Kh7 27.Qg7) 26.Qf7 (26.Qf7 Kh8 27.Qf8) 1–0. pereira – styrij, internet, 2009.

6.Be2 Be7 A) 7.0-0 0-0 (7...Bb7 8.d4 0-0 9.c4 dc4 10.Bc4 c6) 8.d3 Bb7 9.c4 dc4 10.dc4 a4; B) 7.Ne5 0-0 (7...Bb7 8.0-0 0-0 9.d4 c6 10.Ba3 c5; 7...Bd6 8.0-0 0-0 9.f4 Bb7 10.c4 c5; 7...a4 8.a3 0-0 9.0-0 Bb7 10.c4 Nbd7) 8.0-0 Bb7 9.d4 Nbd7 10.c4 Ne5; C) 7.a3 0-0 (7...Bb7 8.0-0 0-0 9.d4 Nbd7 10.Bd3 c5; 7...c5 8.0-0 0-0 9.d3 Bb7 10.c4 Nbd7; 7...c6 8.Ne5 Bb7 9.0-0 0-0 10.Nc3 c5; 7...Bd6 8.Be5 0-0 9.d4 c5 10.0-0 c4) 8.0-0 c5 9.bc6 Nc6 10.Nc3 Ne4 ; D) 7.Nc3 0-0 (7...c5 8.bc6 Nc6 9.0-0 0-0 10.Rb1 Ba6) 8.Ne5 a4 9.a3 Bb7 10.0-0 c5.

5.e3 Bd6

6.a4 0-0 7.g4 (7.Be2!?=) 7...Re8 (7...Ng4 8.Rg1 Nf6 9.Ne5–/+) 8.g5=+ Ne4 9.Bd3 (9.Rg1 e5=+) 9...e5–/+ 10.Nc3?? (better 10.h4–/+) 10...Nc3–+ 11.Bh7 Kh7 12.g6 (12.Bc3 e4 13.g6 A) 13...Kg6 14.Rg1 Kh6 15.Bg7 Kh7 16.Ng5 Kg7 17.Nf7 Kf7 18.Qh5 Ke6 19.Qg4 Ke5 20.Qf4 Ke6 21.Rg6 Qf6 22.Qf6 (22.Rf6?! Kd7 23.Qg4 Kd8+–) 22...Kd7 23.Qf7 Kd8 24.Rg8+– (24.Qd5?! Nd7+–); B) 13...fg6–+) 12...Kh8 (better 12...Kg6 13.dc3 Bc5–+) 13.gf7 (13.dc3 Qf6 14.Qd5 Qg6 15.Rg1–+) 13...Rf8 (better 13...Nd1 14.fe8Q Qe8 15.Rd1 Bg4–+) 14.Ne5 (14.Ne5 Nd1 15.Ng6 Kh7 16.Nf8 Bf8 17.Kd1–+). FeegLood (2155) – AMADAN (2145), lichess.org, 2015.

6.c4 c6 7.d4 Bb4 8.Nbd2 e5 9.de5+/– Ne4 10.a3 Nd2 11.Nd2 Bd2 12.Qd2 Be6 13.Rd1 0-0 14.e4 Qh4 15.ed5 cd5 16.cd5 Qe4 17.Qe2 Bd5 18.Qe4 Be4 19.Rd4 Bf5 20.Bd3 Be6 21.f4 Nd7 22.f5 Bf5 23.Bf5 Ne5 24.0-0 Rfe8 25.Re4 Ng6 26.Re8 Re8 27.Bg6 hg6 28.Kf2 Rd8 29.Ke3 Re8 30.Kf3 (30...Rd8 31.Rc1+–) 1–0. Skaug,Thorbjoern – Fehr,Wolfgang, corr ICCF TT–4–90, 1990.

6.c4 c6 7.d4 dc4 8.Bc4 cb5 9.Bb5 Bd7 10.Nc3 =.

6.c4 Nbd7 7.d4 c5 8.Nbd2 cd4 9.ed4 b6 10.Be2 Qc7 11.Rc1= Qb8 12.0-0 Bb7 13.cd5 Bd5=+ 14.Bc4 0-0 15.Qe2 Bf4 16.Ne5 Qd6 17.Rfd1 Rac8 18.g3 Bd2 19.Rd2 Bc4 20.Rc4 Rc4 21.Nc4 Qd5 22.Ba3 Rc8 23.Ne3 Qe4 24.f3 Qb1 25.Rd1 Qg6 26.d5 e5 27.d6 e4 28.f4 h5 29.Bb2+= Rd8 30.Nc4 Qf5 31.a4 h4 32.Ne3 Qh3 33.Qg2 Qg2 34.Kg2+= hg3 35.hg3 Ne8 36.Ba3 Rc8 37.Nd5 Rc2=+ 38.Kh3 Ra2 39.Bc1 Ra1 40.Nc3 f5 41.Kh4 Kf7 42.g4= g6 43.Kg5 Ng7 44.gf5 gf5 45.Bb2 Rd1 46.Nd1 Ne8 47.Be5 Ke6 48.Ne3 Nd6 49.Bd6 Kd6 50.Kf5 Nc5 51.Kg6 Na4 52.f5 Nc5 53.f6? Nd7–+ 54.Kf5 Kc5 55.f7–/+ Kd4 56.Ke6 Nf8 57.Ke7 Nh7 58.Ng4 e3 59.Nf6 e2 60.Nh7 e1Q 61.Kd7 Qf1 62.f8Q–/+ Qf8 63.Nf8 a4 64.Kc6 a3 65.Kb6 a2 66.Kc7 a1Q 67.b6 Kd5 (68.b7 Qa5 69.Kd7 Qb5 70.Ke7 Qb7 71.Kf6 Qb6 72.Kf7 Qc7 73.Kf6 Qe5 74.Kf7 Qh5 75.Ng6 Ke4–+) 0–1. Labahn,Wolfgang – Krueger,D, corr SOK–92–87, 1992.

6.d4 Nbd7 7.c4 0-0 8.Nc3 Re8 9.Be2 c6 (9...dc4!? 10.Bc4 Nb6=) 10.c5 Bc7 11.0-0 e5 12.a4 (12.de5 Ne5 13.Nd4 Qe7=) 12...Ng4 (12...e4 13.Nd2=) 13.b6 Bb8 14.h3 Ngf6 15.Qd2 Qe7 16.de5 (16.Rae1!?+=) 16...Ne5=+ 17.Ba3 Nf3 18.Bf3 Qe5 19.Rfe1 Qh2 20.Kf1 Bf5 21.Rad1 Ne4 22.Be4 Be4 23.Ne4 Re4–/+ 24.f3 Ra4–+ 25.Ra1 Bg3 26.Reb1 Qh1 27.Ke2 Qg2 28.Kd1 Qf3 29.Qe2 Qe4 30.Bb2 Qh1 31.Kd2 Ra1 32.Rh1 Rh1 33.Qg4 Be1 34.Kd3 g6 35.Qg2 Bb4 36.Qh1 Bc5 37.Qe1 Re8?? 38.Qa5+= Be3 39.Qa7 Bc5 40.Qb7 Re3 41.Kc2 Re2 42.Kb3 Re6 43.Qa8 (43...Bf8 44.b7 Re3 45.Ka2+–) 1–0. SuperForte – ChessMaster2000, 1994.

6.d4 Nbd7 7.Bd3 Bb4 8.c3 Bd6 =.

6.Be2 c5 7.0-0 Nbd7 8.d4 (8.d3 a4=) 8...Qc7 (8...0-0 9.c4=) 9.Nbd2 (9.dc5 Nc5 10.Bf6 gf6=) 9...b6 10.c4 Bb7 11.Rc1 Rc8 12.cd5 Bd5 13.Bd3 Be7 (13...Ba2? 14.Qa4 Bd5 15.e4+–) 14.e4 Bb7 15.Bb1 (15.Qc2 Qf4=) 15...Qb8 (15...0-0 16.e5 Nd5 17.Qe2=) 16.Re1 0-0 (16...cd4 17.e5 Nd5 18.Nc4=) 17.Nc4 (17.d5 Qf4=) 17...Rfd8 (17...cd4 18.Bd4 h5 19.Qe2+=) 18.Qc2 (18.Ba3 g6+=) 18...g6 19.d5 ed5 20.ed5 Re8 21.Re7 (21.Bf6!? Bf6 22.Qd2=) 21...Re7+= 22.d6 Re6 23.Nfe5 (23.Ng5!? Rd6 24.Nd6 Qd6 25.Rd1+=) 23...Ne5–/+ 24.Be5 Re5! 25.Ne5 Qd6 26.Nc4 Qe6 27.f3 (27.Qd2!?–/+) 27...Bd5 28.Nd2 (28.Qd3 Re8–+) 28...Qe2 (better is 28...Qe3 29.Kh1 Re8–+) 29.Qc3? (29.a4–/+) 29...Ng4!–+ 30.Be4?? (30.fg4 Qg2) 30...Ne3 31.Bd5 Qg2 0–1. Mrozinski,Werner – Berens,Thomas, Ruhrgebiet–ch, 2000. (=1.Nf3 Nf6 2.b4 a5 3.b5 d5 4.Bb2 e6 5.e3 Bd6)

6.Ne5 0-0 7.Be2 Nbd7 8.f4 Ne4 9.0-0 Ne5 10.fe5 (worse is 10.Be5 Be5 11.fe5 Qg5–/+) 10…Be7 (11.d3 Nc5=). Hunstock,J – Kruger,D, corr SOK–92–87, 1992.

6.c4 0-0

7.Be2 dc4 8.Bc4 c5 9.Qc2 h6 (9...Nbd7 10.e4 e5 11.0-0=) 10.Nc3 b6 11.Ne4 Be7 12.d4 (12.0-0 Bb7 13.d3 a4+=) 12...cd4 13.Nf6+= Bf6 14.Nd4 Bb7 15.0-0 Nd7 16.Rfd1 Qe7 (16...Rc8 17.Qe2 Qe7 18.Rac1=) 17.a4 (17.Nc6!? Qe8 18.Rd6+=) 17...Rac8= 18.Ba3 Nc5 19.Qa2 Rfd8 20.Rac1 Be5 21.Rc2? (better is 21.f4!? Bd6 22.Bb2=) 21...Qh4–/+ 22.f4 Bd4 23.Rd4?? (better is 23.ed4 Rd4 24.Rd4 Qe1 25.Bf1 Qe3 26.Kh1 Qd4 27.Rc4–+) 23…Qe1–+ (23...Qe1 24.Bf1 Qe3 25.Rf2 Rd4 26.Bc5 Rc5–+) 0–1. Ehrlich,Hans Georg (1910) – Lutterbey,Ralf (1865), Muensterland Verbandsliga, 2005.

7.Nc3 Nbd7

8.d4 Bb4 =.

8.Be2 dc4 9.Bc4 Nb6 10.Bb3 =.

8.Be2 c5 9.cd5 ed5 10.0-0 Nb6 11.Qc2 Bg4 12.Rac1 Rc8 13.Na4 Nc4 14.Bc4+= Bf3 15.gf3 dc4 16.Qc4 Nd7 17.Qg4 Ne5 18.Qg2 f6? 19.f4+– Nd3?? 20.Qd5 Kh8 21.Qd3 g5 22.Kh1 gf4 23.Rg1 fe3 24.de3 Qe7 25.Nb6 Rcd8 26.Nd5 Qe6 27.e4 Be5 28.Be5 fe5 29.Rg2 Rg8 30.Rcg1 Rg2 31.Rg2 Rg8 32.Rg3 Rf8 33.f4! h5 34.Rg5 Qh6 35.Qf3 Rf4?? 36.Qh5+– Rh4 37.Qe8 (37...Qf8 38.Qf8 Kh7 39.Qg7#) 1–0. Margraf,A – Fischer,Ernst, corr OU 9–1989, 1989.

6.d4 0-0

7.c4 b6 =.

7.Bd3 b6 8.0-0 Bb7 (8...c6 9.a4=) 9.Nbd2 Nbd7 10.c4 Ne4 (10...Rc8 11.cd5 Nd5 12.Nc4=) 11.Rc1 f5 12.Qc2 Qe7 13.Ne5 (13.Rfd1 Rac8=) 13...Be5 (13...Ne5 14.de5 Bb4 15.Ne4 fe4 16.Be2+=) 14.de5+= Qg5 (14...Rac8 15.cd5 ed5 16.Nf3+=) 15.Be4 (15.cd5 Nd2 16.f4+=) 15...fe4 (better 15...de4!? 16.Bd4 Rad8+=) 16.cd5+– Bd5 17.Ne4 Qg4 18.Ng3 (18.f4 Rac8+–) 18...Qb4 19.e4 (19.Qe2!? Rac8 20.Rfd1+–) 19...Ba2+= 20.Bc3 Qc4 (20...Qb3 21.Qe2+=) 21.Ba1 Qc2 22.Rc2 Bb3 23.Rc7 Nc5 24.Rc6 (24.Bd4 Rfc8 25.Rc8 Rc8+–) 24...Bc4 25.Rd1 (25.Rc1 Bb5 26.Rb6 Nd3+=) 25...Rab8 (25...Rfb8 26.Rdd6+=) 26.Rdd6 (26.Bd4 Bb5 27.Rb6 Rb6 28.Bc5 Ra6 29.Bf8 Kf8+=) 26...a4 27.Bb2 (better 27.Rb6 a3 28.Rb8 Rb8 29.b6+=) 27...a3? (better 27...Bb5 28.Rb6 Nd3=) 28.Ba3+– Ra8 29.Bb2 Ra2 30.Bc3?? (30.Bd4!? Bb5 31.Rb6 Bc4+–) 30...Rc2?? (better 30...Rff2 31.Rd2 Rfd2 32.Bd2 Rd2 33.Rb6 Rb2–+) 31.Bd2+– Ra8 (31...Rb2 32.h3+–) 32.h3 Nb7 (32...Bb5 33.Rb6 Bc4+–) 33.Rd7?? (better 33.Re6 Nd8 34.Rc4 Rc4 35.Rb6+–) 33...Nc5+– 34.Rdd6 Nb7 35.Rd4 (35.Re6 Nd8 36.Rc4 Rc4 37.Rb6 Kf8+–) 35...Nc5 36.Nh5 (better 36.Be3 Bb5 37.Rb6+–) 36...Ra4?? (36...Be2 37.f3 Nb3+–) 37.Rc7 (37.Rd8 Kf7 38.Rc7 Nd7 39.Rcd7 Kg6 40.Rg7 Kh5 41.g4 Kh4 42.Rh7) 37...Ra8 (37...Rd2 38.Rd2 Nd3+–) 38.Rg7 Kh8 39.Rc7 Bb5 40.Nf6 (40.Nf6 Nd7 41.Rcd7 Ra7 42.Ra7 Rc1 43.Bc1 Bd7 44.Rdd7 b5 45.Rh7) 1–0. Bakhmatsky,Vladislav – Skripka,Nikita (1840), UKR–ch sf U14, 2009.

7.Bd3 c6 8.a4 cb5 9.ab5 Nbd7 10.0-0 Qc7 (10...a4 11.Ba3 Nb6 12.Ne5=) 11.Nbd2 Nb6 12.Ba3 Ba3 (12...a4 13.Qc1=) 13.Ra3+= Bd7 14.Ne5 Rfc8 15.c4 (15.Qf3 Qd6 16.Rfa1 Qb4+=) 15...dc4= 16.Ndc4 Nc4 17.Bc4 b6 (17...Be8 18.f4+=) 18.Qf3 Ra7 19.Ra4 Qd6 20.Rd1 (20.h3 Rac7+=) 20...Rac7 21.e4 (21.h3 Qe7 22.Re1 Ne8+=) 21...Qe7 22.Qe2 (22.Re1!?+=) 22...Ne8= 23.Bd3 Nd6 24.Nd7 Qd7 25.e5 Nf5 26.d5 ed5 27.Rf4 Nh6 28.Bc4 Nf5 (28...Rc4? 29.Rc4 Rc4 30.Qc4 dc4 31.Rd7+–) 29.Rd5 (29.Bd3 Nh6=) 29...Qd5+= 30.Bd5 Rc1 31.Qf1 R8c5 (31...Rf1 32.Kf1 Rc5 33.Rc4 (33.Rf5 Rd5 34.Rf3 Rb5–+) 33...Rc4 34.Bc4+=) 32.Rc4 (32.Rf5?? Rf1 33.Kf1 Rd5–+) 32...R5c4 33.Bc4 Rf1 34.Kf1 Kf8 (34...Nh4 35.f4+=) 35.Ke2= Ke7 36.f4 Nd4 (36...a4 37.Kd3=) 37.Kd3 Ne6 38.g3 Nc5 39.Kd4 ½–½. pcmvr (2745) – huimre (2870), net–chess.com, 2008.

7.Bd3 c6 8.a4 Nbd7 9.0-0 Re8 10.c4 e5 (10...dc4 11.Bc4 cb5 12.Bb5=) 11.c5+= e4 12.cd6 ed3 13.Qd3 Ne4 (13...Nb6 14.Rc1 Qd6 15.Ne5+=) 14.Ba3+= Ndf6 (14...Qf6 15.Nc3+=) 15.Rc1 (15.bc6 bc6 16.Qc2 Nd6+=) 15...cb5 16.Qb5 Nd6 17.Bd6 Qd6 18.Ne5 (18.Nbd2 Re7+=) 18...Nd7 (18...Re7 19.Nd2+=) 19.Nc3+/– Rd8 (19...Nf6 20.Rab1+/–) 20.Qd5 Qd5 21.Nd5 Ne5 22.Ne7 Kf8+= 23.Nc8 Rac8 24.de5 Ke7 25.Rcb1 Rc7 26.Rb5 Rdc8 27.g3 Rc1+= 28.Rc1 Rc1 29.Kg2 b6 30.Rb6 Rc4 31.Ra6 Ra4 32.f4 Ra2 33.Kf3 Ra4 34.f5 Ra1 35.e6 fe6 36.Re6 Kd7 37.Ra6 a4 38.e4 a3 39.e5 a2 40.Kg4 Ke7 41.Ra7 Kf8 42.Ra8 Kf7 43.e6 Kf6 44.Rf8 Ke7 45.Rf7 Ke8 46.Ra7 Kf8 47.Kg5 Ke8 48.g4 Kf8 49.h4 Ke8 50.h5 h6 51.Kg6 Rg1 52.Kg7 a1Q 53.Ra1 Ra1 54.Kh6 Ke7 55.Kg5 Rh1? 56.h6 Rh2 57.Kg6 Rh1 58.h7 Rh2 59.Kg7 Rh4 60.h8Q Rg4 61.Kh7 Rh4 62.Kg8 (62.Kg8 Rh8 63.Kh8+–) 1–0. Stejskal,Drahoslav – Kubat,Jiri, CZE–ch U18 Loucovice, 1979.

7.Bd3 Nbd7 8.0-0 Nb6 9.a4 Bd7 10.Nbd2 c5 (10...Qe7 11.Ne5+=) 11.dc5+= Bc5 12.Ng5 h6 13.Bf6 gf6 14.Nh7 Re8 15.Qh5 Kg7 16.Nb3 (16.Qg4 Kh8 17.Qf4 Kg7+=) 16...Bd6 17.f4 f5 18.Rf3 (18...Kh7 19.Qf7 Kh8 20.Rh3+–) 1–0. pcmvr (2785) – gmgenius (2370), net–chess.com, 2006.

6.Be2 0-0

7.0-0 Nbd7 8.c4 dc4 9.Bc4 Nb6 10.Be2 =.

7.0-0 Nbd7 8.c4 c5 9.d3 Qc7 10.Nbd2 b6 11.Rc1 Bb7 12.h3 Rac8 13.a3 h6 14.Qb3 Rfe8 15.Qc2 Qb8 16.Rfe1 Qa8 17.cd5 ed5 18.Nh4 g6 19.Nhf3+= Re6 20.Qc3 Rce8 21.Bf1 Qd8 22.a4 Qe7 23.Red1 Ne5 24.Nh2 Ned7 25.Nhf3 Kh7 26.Qc2 Nh5 27.g4 Ng7 28.Re1 f5 29.Bg2= Rf8 30.Nf1 fg4=+ 31.hg4 Ne5 32.Ne5 Be5 33.Be5 Re5 34.d4 Rg5 35.Nh2 h5?? 36.f4+– Rg4 37.Ng4 hg4 38.dc5 Qh4 39.c6 Bc8 40.Bd5 g3 41.Qg2 Nh5 42.c7 (42...g5 43.Qe4 Rf5 44.Qe7 Ng7 45.Bg2 Qh2 46.Kf1 gf4 47.Ke2 f3 48.Kd3 Qg2 49.Rh1 Kg8 50.Qd8 Kf7 51.Qc8 Rd5 52.Ke4 f2 53.Kf4 Nh5 54.Rh5 f1Q 55.Rf1 Qf1 56.Kg3 Qe1 57.Kf4 Qf2 58.Ke4 Qg2 59.Kf4 Qf1 60.Kg3 Qg1 61.Kf4 Qf2 62.Ke4 Qg2 63.Kf4 Qf1 64.Kg3=; 42.Red1 Nf6+–) 1–0. Gross,Wilhelm – Krueger,D, corr SOK–92–87, 1992.

7.0-0 Nbd7 8.d4 Nb6 9.a3 Bd7 10.Nbd2 Ne4 11.c4 Nc4 12.Bc4 Nd2 13.Nd2 dc4 14.Nc4? (better is 14.a4!?=) 14...Bb5–/+ 15.Qb3 Bc4 16.Qc4 Qh4 17.g3 Qh5 18.e4 b5 19.Qc6 Rab8 (better is 19...Qf3!?–/+) 20.e5= Be7 21.Qc7 Bg5 22.f4 (22.Qa5 Rfc8=) 22...Bh6?? (better is 22...Rbc8 23.Qb7 Rc2–/+) 23.Qa5+= Rfc8 24.Rac1 Qe2 25.Rc8 Rc8 26.Qa6 Re8 27.Bc1 g6 28.Qc6 Re7 29.Qd6 Bf8 30.Qd8 Ra7 (30...Ra7 31.f5! Qa2+– (31...gf5?? 32.Bh6 Qe3 33.Be3+–)) 0–1. typ48 – thornesmith, kurnik, 2012.

7.0-0 Nbd7 8.d4 Nb6 9.a4 Ne4 10.Nbd2 c6 11.Ne4 de4 12.Nd2 f5 13.c4 Rf6 (13...Qc7 14.h3 c5 15.dc5 Bc5 16.Nb3+=) 14.g3 Bc7 15.Nb3 Rg6 16.Qd2 Qh4 17.Rfb1 (17.Na5 f4 18.ef4 Qh3–+) 17...cb5 18.ab5 a4 19.Nc5 Qh3 (19...e5 20.de5 Qe7 21.Qd4+/–) 20.Bf1 Qh5 21.Qe2 Qh4 22.Qd1 e5 (22...Qg4!?+/–) 23.Na4+– Na4? (better is 23...Ra4 24.Ra4 ed4 25.Bd4 Na4 26.Qa4 Qd8+–) 24.Ra4 Ra4 25.Qa4 Qd8 (25...Qe7 26.Qa8 Qf8 27.de5+–) 26.de5 Be6 (26...Qe8 27.Qa8 Bb6 28.Ra1+–) 27.Rd1 Qb8 (27...Qe8 28.c5 h6 29.Be2+–) 28.c5 (28.c5 Qe8 29.Qa7+–) 1–0. Gretencord,Ulrich – Weidemann,Uwe, DESC GS003 email, 2006.

5.e3 Nbd7

6.a4 Nb6 7.d4 Ne4 8.Be2 Bd6 9.0-0 Bd7 10.Nc3 (10.Nbd2 0-0=) 10...Ng5 (10...Nc3 11.Bc3 c6 12.Qd2=) 11.Ne5 (11.Nd2 f6 12.e4=) 11...Qf6 (better 11...f6!? 12.Nd7 Qd7+=) 12.Bd3 Be5 13.de5 Qe5 14.Qc1 Qd6 15.f4 Ne4 (15...h6 16.fg5 hg5 17.g3+–) 16.Be4 (16.Ne4!? de4 17.Be4 Qf8+–) 16...de4+– 17.Ba3 c5 18.Ne4 Qd5 19.Nc5 (19.Bc5? Nc4 20.Rd1 Qe4–+) 19...0-0-0? (better 19...Bc8+–) 20.Qe1 (20.Nd7?! Rd7 21.Qb2 Qe4 22.Qc3 Nc4+–) 20...Nc4 (20...Be8 21.Qa5 Nc4 22.Qa8 Kc7 23.Qa7 Bb5 24.ab5+–) 21.Rd1 Qh5 22.Qc3 (22.Rd7?! Rd7 23.Qc3 Na3 24.Nd7 Kd7 25.Qd3 Qd5 26.Qa3 Rc8+–; 22.Nd7?! Rd7 23.Rd3 Na3 24.Qc3 Rc7 25.Qa5 Kb8 26.Ra3 Rhc8+–) 22...Na3 (22...Bb5 23.Rd8 Rd8 24.ab5 Qe2+–) 23.Nd7 (23.Nd7 Nc4 24.Qc4 Qc5 25.Qc5; 23.Rd7?! Rd7 24.Nd7 Kd7 25.Qa3 Rc8 26.Qd3 Ke7+–) 1–0. Adlai – Spesjhp, internet, 2019.

6.a4 c5 7.c4 (7.bc6 bc6 8.Ne5 Ne5 9.Be5 Nd7=+) 7...b6 (7...Bd6 8.cd5 ed5 9.Nc3=+) 8.d3 (8.d4 cd4 9.Nd4 Bb4 10.Bc3 0-0=) 8...Bb7 (8...Bd6 9.cd5 ed5 10.Be2=+) 9.Nbd2 (9.Be2 dc4 10.dc4 Be7+=) 9...Bd6=+ 10.Be2 0-0 11.0-0 Qe7 12.Re1 (12.Rc1 e5=) 12...Rfe8 (12...e5 13.d4=+) 13.Bf1 (13.d4 e5=) 13...Rad8 14.Qc2 (14.Be2 e5=+) 14...Bc7 (14...e5 15.e4 de4 16.de4=) 15.Rad1 e5 16.cd5 Nd5 17.e4 (17.Ne4 f5 18.Nc3 Nc3 19.Qc3 Bf3 20.gf3 Qg5 21.Bg2 Nf6=+) 17...Nf4 18.Nc4 Qf6 19.Ne3 (19.Be2 Qg6 20.Bf1 f6=+) 19...Nf8 (19...Nh3 20.Kh1=+) 20.Ng4= Nh3 21.gh3 (better is 21.Kh1!? Qf4 22.Ne3=) 21...Qf3–/+ 22.Bg2 Qf4 23.Bc1 f5 (23...Ne6 24.Bf4 Nf4 25.Ne3+–) 24.Bf4 fg4 (24...ef4 25.Qc4 Ne6 26.ef5 Bg2 27.Re6+–) 25.Be3 (25.Bg5!? Rd4 26.hg4 Ne6+–) 25...gh3 (25...Bc8 26.hg4 Bg4 27.Rc1+–) 26.Bh3 Rd6 (26...Bd6 27.Bf5+–) 27.Qc4 Kh8 (27...Ne6 28.Bf5+–) 28.Qf7 (28...Be4 29.Qe8+–) 1–0. Lebel,Patrick (2165) – Wildemeersch,Gerard (1820), Hautes Alpes op 3rd, 2002.

6.a4 Be7 7.Be2 Nb6 8.d3 Bd7 9.c4 Bb4 10.Nbd2 c6 11.0-0 Qe7 12.Bd4 c5 13.Be5 Rc8 14.Nb3 0-0 15.Qc2 Be8 16.Qb2 (16.Bc3 dc4 17.dc4 Ra8+/–) 16...Nbd7+= 17.Bc3 Bc3 18.Qc3 b6 19.Ne5 Ne5 20.Qe5 Nd7 21.Qc3 Qd8 22.f4 f6 23.Bf3 Bf7 24.g3 Qc7 25.e4 ½–½. Streit,Bodo – Schreiber,Nico, Mecklenburg VP LL2, 2007.

6.c4 Nb6 7.cd5 ed5 8.Be2 Bd6 9.d3 0-0 10.Nbd2 Re8 11.0-0 c5 12.bc6 bc6 13.Qc2 Bd7 14.e4 de4 15.de4 Ng4 16.h3 Ne5 17.Ne5 Be5 18.Be5 Re5 19.f4 Re8 20.Bf3 Qh4 (20...Qf6 21.Qc5 Rab8 22.Rab1+=) 21.Qc5+= Nc8 (21...Qf4? 22.Bh5 Re5 23.Qb6 (23.Rf4?! Rc5 24.Bf7 Kh8+=; 23.Bf7?! Qf7 24.Qe5 Qe8+–) 23...Qd2 24.Rad1+–) 22.e5 Ne7 (22...Qf4? 23.Bc6 Qd2 24.Ba8+–) 23.Nc4 Be6 (23...Qf4?? 24.Bh5 Nd5 25.Rf4 Nf4 26.Bf3+–) 24.Nd6 (worse is 24.Bc6 Rec8 25.Na5 Bd5–/+) 24...Rf8 25.f5 (worse is 25.Bc6 Rfc8 26.Nc8 Rc8=) 25...Nf5 26.Nf5 (26.Bc6!? Ng3 27.Rf2+=) 26...Bf5= 27.Bc6 Rac8 28.Rf5 Rc6 29.Qc6 Qd4 30.Kh2 Qa1 31.e6 g6 (31...Qa2?? 32.e7 g6 33.ef8R (33.ef8N?! gf5 34.Qd6 Kg7+–) 33...Kf8 34.Qd6 Kg7 35.Qf6 Kg8 36.Rb5+–) 32.Ra5 Qf6 33.ef7 Qf7 34.Qd6 Qb7 35.Re5 Ra8 (35...Qf7!? 36.Re6 Qa7+/–) 36.Re7+– Qb8 37.Rc7 Qf8 38.Qd5 Kh8 39.Qd4 Kg8 40.Qc4 Kh8 41.Qc3 Kg8 42.Qc4 Kh8 43.Qd4 Kg8 44.Qd5 Kh8 45.Qe5 Kg8 46.Rb7 Rd8 47.Re7 Ra8 48.a4! Qb8?? 49.Rc7 Qf8 50.Re7 Qb8 1–0. Marton,Jozsef (2185) – Rako,Istvan (2150), HUN–chT2 Szechenyi, 2009. (=1.Nf3 Nf6 2.b4 a5 3.b5 e6 4.Bb2 d5 5.e3 Nbd7)

6.c4 dc4 7.Bc4 Nb6 8.Be2 Bd7 9.0-0 Be7 10.Nc3 a4 11.a3 0-0 12.Ne5 Be8 13.Qc2 Ra5 14.f4 Nfd7 15.Rad1 Ne5 16.fe5 c5 17.Rb1 c4 18.d3 Bb5 19.Nb5 Rb5 20.Bd4 cd3 21.Bd3 Rb1 22.Rb1 Nd5 23.Bh7 Kh8 24.Bd3 Ba3 25.Qa4. b4_player – story, casual, 2013.

6.c4 Nc5 7.cd5 Nd5 8.d4 Ne4 9.a3 Nf2?? (better is 9...Bd6=) 10.Kf2+– Qf6 (10...Bd6 11.Nc3+–) 11.e4 g6 (11...Nb6+–) 12.ed5 ed5 13.Bd3 Bg4 14.Qe1 Be7 15.Rf1 0-0-0 (15...Bf3 16.Kg1+–) 16.Kg1 Rhe8 (16...Bd6 17.Qa5 Kb8 18.Nbd2+–) 17.Qa5 Bf3 18.Rf3 Kd7 (18...Qe6+–) 19.Rf6 Ra8 20.Ra6 ba6 21.Nc3 ab5 22.Qb5 c6 23.Qb7 Kd6 24.Nb5! (24...cb5 25.Qb6 Kd7 26.Bb5 Kc8 27.Rc1 Bc5 28.Rc5#) 1–0. Trkn – Heebeejeeian, ICC, 2004.

6.c4 c6 7.a4 Bb4 8.Be2 Nb6 9.Ne5 Nc4 10.Nc4 dc4 11.Bc4 Bd7 12.Na3 0-0 13.0-0= Qe7 14.Qe2 e5 15.Nc2 c5 16.d4 ed4 17.ed4 Qe2= 18.Be2 Nd5 19.Bf3 Be6 20.Rfd1 c4= 21.Ba3 Ba3 22.Na3 Rac8 23.Rac1 c3 24.Rd3 Rfd8= 25.Bd5 Rd5 26.f3 Kf8 27.Kf2 Bf5 28.Rdc3+= Rc3 29.Rc3 Rd4 30.Nc4 Be6 31.Na5 b6 32.Nc6 Ra4 33.Rd3 Ra8 34.Rd6 Bc4 35.Nd4 Rb8 36.Ke3 g6 37.Kd2 Ke7+= 38.Rc6 Bd5 39.Kc3 Kd7= 40.Rf6 Ke7 41.Nc6 Kf6 42.Nb8 Ke6 43.Kd4 Bb7 44.Na6 Kd6 ½–½. Baecklin,Stefan – Sandqvist,Hugo, corr SSKK lag–SM, 1976.

6.c4 c6 7.a4 Bd6 8.d4 dc4 9.Bc4 0-0 10.0-0 Nb6 11.Bd3 Nbd5 12.g3 Nb4 13.Be2 Ne8 14.Nc3 f5 15.Rc1 Rf6 16.bc6 bc6 17.Qb3 Rb8 18.Qc4 Ba6 19.Nb5 cb5 20.ab5 Bb5 21.Qb5 Rb5 22.Bb5 Nc7 23.Be2 Ncd5 24.Ra1 h5 25.h4 Rg6 26.Kg2 f4 27.e4 fg3 28.ed5 gf2 29.Kf2 ed5 30.Ng5 Rf6 31.Kg2 Nc2 32.Rf6 gf6 33.Rc1 Ne3 34.Kf3 fg5 35.Ke3 Bf4 36.Kd3 Bc1 37.Bc1 gh4 38.Bh5 Qc8 39.Bd2 Qh3 40.Kc2 Qf5 0–1. ognos (1640) – mors32 (1700), kurnik, 2012.

6.c4 c6 7.Nc3 Be7 8.Rc1 (8.cd5 cd5 9.Be2 0-0+=) 8...0-0= 9.Be2 Nb6 10.cd5 cd5 (10...ed5 11.0-0+=) 11.Bd3 (11.0-0 a4+=) 11...a4 (11...Bd7 12.Ne5+=) 12.0-0+= Bd6 13.Ne2 Nbd7 14.Bc2 (14.Ng3 g6+=) 14...a3= 15.Bc3 Qb6 16.Rb1 e5 17.d3 (17.h3 Re8=) 17...Re8 18.h3 Nf8 19.Qd2 Ng6 20.Rfc1 Bd7 21.Ng3 h6 22.Bd1 Rac8 23.Be2 Qd8 (23...Bb5 24.d4 Rc4 25.de5 Be5 26.Be5 (26.Bc4?! dc4 27.Ne5 Ne5+–) 26...Ne5 27.Nd4+–) 24.Bb4 Rc1 25.Qc1 Bc7 (25...Bb4 26.Rb4 Qa5 27.Rb3=) 26.Ba3 e4 27.de4 Bg3 28.fg3 Ne4 29.g4 Qb6 30.Bc5?? (better is 30.Rb3=) 30...Nc5–+ 31.Nd4 Qd6 (31...Ne5 32.Ra1–+) 32.Ra1 (32.Qa3 Nh4 33.Nf3 Nf3 34.Bf3 d4 35.ed4 Qd4 36.Kh1 Bb5–+) 32...Ra8 33.a3 (33.a4 Ra4 34.Ra4 Na4–+) 33...Ne5 34.Qc2 (34.Ra2 b6–+) 34...Ne4 35.a4 h5! 36.g5 (36.gh5 Qf6 Combination) 36...h4 37.Qc1 (37.Qa2 Ng5 38.Qb1 Ne4–+) 37...Qe7 38.Nf3 (38.g6 Ng6 39.Bd3 Ng3–+) 38...Nf3 39.Bf3 Qg5 40.Be4 de4 41.Kh1 Qf6 (41...Qe5 42.Rb1 Ra4 43.Qd1 Bb5 44.Qd8 Be8 45.Qh4–+) 42.Rb1 (42.Ra3 Qd6–+) 42...Bh3! 43.Qf1 (43.gh3 Qf3 Double attack) 43...Bf5 44.Rb4 (44.Qf4 Ra4 45.Rd1 g6–+) 44...Qg5 45.Qf2 (45.Rc4 Be6 46.Rc1 Ra4–+) 45...Rd8 46.Rb1 h3 47.gh3 (47.g3 Rd3 48.Rf1–+) 47...Bh3 48.Kh2 Bc8 49.Rf1 Rd6 50.Qg3 Rh6 51.Kg2 Bh3 52.Kf2 Rf6 53.Qf4 Rf4 0–1. bla_ner (1910) – marekt (2150), gameknot.com, 2015.

6.c4 Bd6 7.a4 (7.d4 Bb4 8.Nbd2 0-0=) 7...0-0 8.Be2 c5 (8...Nb6 9.cd5 Nbd5 10.0-0=) 9.0-0 (9.d4 cd4 10.Qd4 e5=) 9...b6 10.d4 Bb7 11.Nc3 (11.cd5 Nd5 12.Nbd2 Rc8=) 11...Rc8 12.Rc1 (12.cd5 Nd5 13.Rc1 Nc3 14.Bc3 Qc7=+) 12...Qe7 (12...dc4!? 13.Nb1 Bf3 14.gf3 cd4 15.Bd4 Qe7–/+) 13.cd5= Nd5 14.dc5 (14.Nd5 Bd5 15.Bc4 Bc4 16.Rc4 Rfd8=) 14...Nc5=+ (worse 14...bc5 15.Nd5 Bd5 16.Qd2+=) 15.Nd5 Bd5 (worse 15...ed5 16.Nd4 Qe5 17.g3=) 16.Nd4 Rfd8 17.Bf3 White gets in control 17...Bf3 18.Qf3 Na4 19.Ba1 Qg5 (better 19...Rc1 20.Rc1 Bc7–/+) 20.Nc6+= Re8 (better 20...Qh6!? 21.h3 Qg5+–) 21.Qd1+– Ba3 22.Qa4 Bc1 23.Rc1 h6 (better 23...Rc7+–) 24.h4 Qd5 (24...Qf5 25.Ne7! Re7 26.Rc8 Kh7 27.Rc6+–) 25.Ne7!! Re7 Deflection from c8 26.Rc8 Kh7 27.Bd4 e5 (27...Qe4 28.Rh8! Kg6 29.Qa1+–) 28.Bb6 Re6 29.Rc6 (worse 29.Qa5 Rg6 30.g3 Qb7+–) 29...e4 (29...Re8 30.Bc7 (worse 30.Qa5 Qd1 31.Kh2 Qg4+–) 30...Qd3 31.b6+– (worse 31.Qa5 Qb1 32.Kh2 Qe4+–; worse 31.Ba5 Qb1 32.Kh2 Ra8+–)) 30.Re6 Qe6 31.Ba5 g5 (31...Qd5 32.b6 f6 33.Qb4+–) 32.hg5 hg5 33.b6 Qd5 34.Qb4 Qd1 35.Qe1 Qd5 (35...Qb3 36.Qd2 Qb1 37.Kh2+–) 36.Qb1 Qb7 37.Bc3 (better 37.Qc2 Qd5 38.Qc8 Qd1 39.Kh2 Qd6 40.g3+–) 37...f5 (37...Kg6+–) 38.Bd4 Kg6 39.Qc1 Kh5 40.Qc7 Qa6 (40...Qc7 41.bc7 f4 42.c8Q Kh6 43.Qe6 Kh5 44.Qf7 Kg4 45.Qd7 Kh5 46.Qh7 Kg4 47.Qh3) 41.Qh7 Kg4 42.Qh3 1–0. BeepBeepImAJeep – beatles_21 (2600), lichess.org, 2017.

6.c4 Be7 7.cd5 ed5 (worse is 7...Nd5 8.Bg7 Rg8 9.Bd4+/–) 8.Be2 a4 (8...0-0 9.0-0=) 9.Qc2+= a3 10.Bd4 0-0 11.0-0 Re8 12.Rc1 (12.Nc3 Nc5+=) 12...Bd6 13.Bd3 (13.Nc3 Ne5=) 13...b6= 14.Nc3 Bb7 15.Bf5 1–0. forsetinn (2355) – tallx (1900), gameknot.com, 2015.

6.d4 Bb4 7.c3 Bd6 8.Ba3 =.

6.d4 Nb6 7.Nbd2 Na4 8.Bc1 =.

6.d4 Nb6 7.Nbd2 Bd6 8.Be2 Na4=+ 9.Qc1 Nb2 10.Qb2 b6 11.0-0= Bb7 12.a4 Qe7 13.Rfc1 0-0 14.c4 Ne4 15.cd5 Nd2 16.Nd2 Bd5 17.Bf3 Bf3 18.Nf3+= Rfe8 19.Rc6 Rac8 20.Qc3 f6 21.e4 e5 ½–½. Schirmer – Meya, Dortmund GER, 1995.

6.d4 Nb6 7.Bd3 Bd6 =.

6.Be2 Be7 7.0-0 0-0 8.d4 a4 9.c4 c6 (9...a3 10.Bc3=) 10.Nc3 (10.Ba3 dc4 11.bc6 bc6 12.Bc4 Bb7=) 10...Qa5 (10...a3 11.Bc1=) 11.a3+= dc4 12.Bc4 Nb6 (12...c5 13.Qc2=) 13.Bd3 cb5 14.Nb5 Nbd5 15.Qe2 (15.Ne5 Bd7 16.Nd7 Nd7+=) 15...Bd7 16.Rfc1 (16.Ne5 Bb5 17.Bb5 Rac8+=) 16...Rfc8 17.h3 (17.Rab1 Bb5 18.Bb5 Nc3=) 17…h6 ½–½. Veer,Willem – Schinis,Mario, Luzern olm, 1982.

6.Ne5 Bd6 7.f4 0-0 =+.

6.Bf6 gf6 7.d4 =.

6.Bf6 Qf6+= 7.d4 a4 8.Bd3 Nb6 (8...e5 9.de5 Ne5 10.Ne5 Qe5 11.c3+=) 9.0-0= Bd7 10.Ne5 Bd6 11.f4 0-0 12.Nd2 Bb4 13.Nd7 Nd7 14.Nf3 Bc3 15.Rb1 h6 16.Ne5 Nb6 17.Qf3 a3 18.Rb3 Bb2 19.c4 dc4 20.Bc4 Ra4 21.Bd3 Qe7 (21...Rb8!?+/–) 22.Qb7 Nd5 23.Re1 Nc3 24.b6 Nd5 (24...Raa8 25.Nc4 Rfb8 26.Qc6+– (26.Qc7?! Qc7 27.bc7 Rb3 28.ab3 Rc8=)) 25.Bb5 (better is 25.Be4!? Raa8 26.Nc6+–) 25...Raa8+/– 26.bc7 Qc7 (26...Rac8!?+/–) 27.Qc7+– Nc7 28.Bc4 (28.Bc6!? Ra6+–) 28...Rfb8 29.Nd7 Rb3 30.Bb3 (30.ab3? a2–+) 30...Nb5 31.Nb6 (31.g4!?+/–) 31...Rb8+= 32.Nc4 Nc3 33.Rf1 Rb3 34.ab3 a2 35.Nd2?? (35.Nb2 Nb1 36.Nc4 a1Q–+) 35...a1Q (better is 35...Bc1! 36.Kh1 a1Q–+) 36.Ra1–/+ Ba1 37.Kf2 Nd5 38.g4 Bc3 39.Nc4 Kf8 40.Kf3 Ke7 41.e4 Nb4 (41...Bd4?! 42.ed5 ed5 43.Ne3=) 42.Ke3 g5 43.f5 Nc6 44.d5 ed5 45.ed5 Nb4 46.Ke4 Na6 47.d6 Kd7 48.Ne5 (better is 48.Kd5!?–/+) 48...Kd6–+ 49.Nf7 Ke7 50.Nh6 Kf6 51.Kd5 Kg7 52.Kc4 Be1 0–1. cmulligan (2250) – pigjones (2000), net–chess.com, 2012.

6.a4 Bd6

7.Nc3 =+.

7.d3 0-0+= 8.Be2 e5 9.Nbd2 Qe7 10.Nb3 (10.0-0 e4 11.de4 de4=) 10...c5 (10...Bb4 11.c3 Bd6 12.Qd2+=) 11.c4 b6 12.Qc2 e4 (12...dc4 13.dc4 e4 14.Nfd2=) 13.de4 (13.Nfd2 Bb7=) 13...de4+= 14.Nfd2 Bb7 15.0-0-0 Ne5 16.Nf1 Rad8 17.Ng3 Nd3 18.Bd3 Bg3 (18...ed3?! 19.Rd3 Be5 20.Be5 Qe5 21.Rhd1 Rd3 22.Rd3+=) 19.Bf1 Rd1 20.Kd1 Rd8 21.Kc1 Be5 22.Be2 (22.Be5 Qe5 23.Be2 Rd7–/+) 22...Bc8 (22...Nd7 23.Be5 Qe5 24.Bg4–/+) 23.h3+= h5 24.Rd1 Re8 25.Rd2 Bf5 26.Qd1 h4 27.Be5 Qe5 28.Kc2 Kf8 29.Rd6= Qe7 30.Rb6+/– Rd8 31.Qa1 Nd7 32.Rh6! Nf6 33.Rh4+– Kg8 34.Rf4 Bg6 35.Rf6! gf6 36.Na5 Qd6 37.Nb3 f5 38.g3 Bh5 39.Qf1 Bf3 40.a5 Qe5 41.a6 Rd3? 42.Nd4 cd4 43.Bd3 ed3 44.Kb3?? d2–+ 45.b6 Qa5 46.b7 d1Q 47.Qd1 Bd1 (47...Bd1 48.Kb2 Qc3 49.Ka2 Bb3 50.Ka3 Bc2 51.Ka2 Qb3 52.Ka1 Qa3#) 0–1. De Visser,Arno – Burggraaf, 1988.

7.d4 0-0 8.Nbd2 (8.Ba3 A) 8...Qe7 9.Bd6 (9.Bd3 Ba3 10.Ra3 e5 11.de5 Ne5 12.Ne5 Qe5) 9...Qd6 10.c4 e5 11.cd5 Nd5 12.Bc4 N5b6; B) 8...Ba3 9.Ra3 Qe7 10.Be2 e5 11.0-0 Rd8 12.de5 Ne5; 8.Bd3 A) 8...Qe7 9.0-0 (9.Nbd2 c5 10.bc6 bc6 11.0-0 c5 12.c4 cd4; 9.Ne5 Bb4 10.c3 Bd6 11.Ba3 Ba3 12.Ra3 Ne5) 9...e5 10.Nh4 g6 11.de5 Ne5 12.Nf3 Nf3; B) 8...Qe8 9.Ra2 (9.0-0 e5 10.de5 Ne5 11.Nbd2 Bg4 12.h3 Bh5; 9.Nbd2 e5 10.de5 Ne5 11.0-0 Bg4 12.h3 Bh5) 9...c6 10.0-0 Qe7 11.Nbd2 Rd8 12.c4 c5; C) 8...Ne8 9.Ba3 (9.c4 dc4 10.Bc4 Nef6 11.0-0 Nb6 12.Bd3 Nfd5; 9.0-0 c5 10.bc6 bc6 11.Nbd2 c5 12.c4 cd4) 9...c5 10.bc6 bc6 11.Bd6 Nd6 12.Nc3 Qf6; D) 8...Re8 9.0-0 (9.Ba3 Ba3 10.Na3 e5 11.de5 Ne5 12.Ne5 Re5; 9.Ne5 Bb4 10.Nd2 Ne5 11.de5 Nd7 12.0-0 Qg5) 9...e5 10.de5 Ne5 11.Ne5 Be5 12.Be5 Re5; E) 8...c5 9.dc5 Nc5 10.0-0 Rb8 11.Nbd2 Qe7 12.Be5 Rd8) 8...c5 9.c4 (9.dc5 Nc5 10.c4 b6 11.cd5 ed5 12.Be2 Bg4; 9.Be2 Qe7 10.dc5 Nc5 11.c4 e5 12.cd5 e4) 9...cd4 10.ed4 (10.Nd4 e5 11.N4f3 (11.Nc2 Nb6 12.c5 Bc5) 11...Qe7+= (11...e4 12.Nd4 Nc5) 12.Be2 dc4) 10...b6 (10...Re8 11.Be2 dc4 12.0-0 c3) 11.Bd3 dc4 12.Nc4 Bb4 13.Nfd2 Bb7 14.0-0 Rc8 15.Rc1 Nd5 16.Qh5 f5 17.g3 Rf6 18.Rfe1 Rh6 19.Qd1 Nf4 20.Bf1 (20.gf4 Rh2 21.Nf3 Rh3–/+) 20...Qg5 (20...Qh4 21.gh4 Rg6 22.Bg2 Rg2 23.Kf1 Rh2 24.f3 Rh1 25.Kf2 Nd3 26.Ke3 Re1 27.Kd3 Rd1 28.Rd1–/+) 21.f3 (21.Ne5!? Rd8 22.Nef3+=) 21…Qh5–/+ (21...Qh5 22.h4 Rg6–+) 0–1. Gary K – muess26, ChessWorld.net, 2009.

7.d4 c5 8.dc5 (8.Be2 cd4 9.ed4 0-0 10.Ba3 Ba3 11.Ra3 Re8 12.0-0 e5) 8...Nc5 (8...Bc5 9.Bd3 Qc7 10.0-0 e5 11.Nfd2 Bd6 12.Be2 0-0) 9.Be2 (9.Bd3 Rb8 10.0-0 0-0 11.Nbd2 Qe7 12.Be5 Rd8) 9...0-0 10.0-0 b6 11.Be5 Nfe4 12.Qd4 Be5.

7.d4 Ne4 =.

7.Be2 e5 8.c4 dc4 9.Na3 0-0 (9...e4!? 10.Nd4 Ba3 11.Ra3 Ne5+=) 10.Nc4= The pressure on e5 grows 10...Bb4 (10...e4!? 11.Nd4 Nc5=) 11.Nfe5 Ne5 12.Be5 Re8 13.0-0 Be6 14.d4 Bd5 15.Qc2 Rc8 16.Bd3 h6 17.e4 Bc4 18.Bc4 Ng4 19.Qb3 Ne5 20.de5 Qe7 21.Rac1 Rf8 (21...Bd2!? 22.Rcd1 Bf4+/–) 22.e6+– f5 23.Rcd1 Rcd8 (23...fe4?? 24.Rd7 Qh4 25.e7 Kh8 26.ef8R Rf8 27.Qb2+–) 24.ef5 Bd6 25.Qc2 Kh8 26.g3 b6 27.Kg2 Rf6 28.Rd5 Rdf8 29.Bd3 h5 30.h4 Rd8 31.Qe2 Rh6 32.Rd1 Re8 33.Be4 Qf6 34.Qc4 Re7 35.Rd6 cd6 36.Rd6 Qb2 (36...Re8+–) 37.Qc8 1–0. Janek – Zack, internet, 2016.

6.c4 a4

7.a3 dc4 8.Bc4 Nb6 9.Be2 =.

7.a3 Bd6 8.d4 c5 9.cd5 ed5 10.dc5 Nc5 11.Nbd2 0-0 12.Be2 Qe7 13.0-0 Bg4 14.h3 Bh5 15.Nh4 Be2 16.Qe2 Qe6 17.Ndf3 Rfe8 18.Nd4 Qe4 19.Nhf5 Be5 20.Rfd1 Nb3 21.Nb3 Qf5 22.Nd4 Qg6 23.Nf3 Bb2 24.Qb2 Rac8 25.Rac1. Schirmer,Michael (2135) – Binder,Klaus (1850), DESC, 2002.

7.cd5 ed5 8.Qc2 Bd6 9.Bd4 (9.Be2 0-0 10.0-0 Re8 11.Bd4 a3 12.Rc1 Qe7) 9...0-0 10.Be2 Re8 (10...a3 11.0-0 Qe7 12.Nc3 c5) 11.0-0 (11.Nc3 a3 12.0-0 c5) 11...Ne4 (11...a3 12.Nc3= (12.Rc1 Qe7) 12...c5) 12.d3 Nec5 (12...Nef6 13.Nc3=) 13.Nc3+= c6 14.bc6 bc6 15.Bc5 Nc5 16.d4 Ne4 17.Ne4 (17.Na4 Bf5 18.Bd3 Bg4+=) 17...de4= 18.Nd2 Qc7 (18...Qh4 19.g3 Qe7 20.Nc4=) 19.h3 Qe7 20.Rfb1 Ba6 21.Ba6 Ra6 22.Rc1 Ba3 23.Rf1 c5 24.d5 Bb4 25.Nc4 a3 26.d6 (26.Rad1 Ra7=) 26...Qe6= 27.Rab1 Raa8 28.Rb3 f6 (28...Ra7 29.Rfb1=) 29.Rfb1 f5 30.Qe2 Ra7 31.Kh2 h6 32.Kg1 g6 33.h4 Rf8 34.Rc1 Qf6 35.h5 gh5 36.Qh5 Kh7 37.Rd1 Qe6 38.Qe2 Rg8 39.Rbb1 Rag7 40.g3 Qf6 41.Qh5 Rg5 42.Qh3 f4 43.ef4+= Qf4 44.Rb3 Rf8 45.Qf1 Qg4 46.d7 Rd8 47.Ne3 Qe6 48.Qc4+/– Qc4 49.Nc4 Rg7 50.Ne5 Re7 51.f4 ef3 52.Rd5 Re5 53.Re5 Rd7 54.Rf3 c4 55.Rb5 Bd2 56.Rc5 c3 57.Rc6 Re7 58.Rf8 Be3 59.Kg2 Bd4 60.Kf3 Ra7 61.Rfc8 Be5 62.Ke4 Re7 63.Kf5 1–0. marekt – muess26, ChessWorld.net, 2009.

7.cd5 ed5 8.Bd4 A) 8...Bd6 9.Be2 (9.Nc3 a3 10.Be2 0-0 11.Rc1 Re8 12.0-0 Qe7; 9.Qc2 0-0 10.Be2 a3 11.0-0 Qe7 12.Re1 Re8) 9...0-0 10.Nc3 a3 11.0-0 c5 12.bc6 bc6; B) 8...Bc5 9.Be2 (9.Nc3 Bd4 10.Nd4 Nb6 11.Bd3 0-0 12.0-0 Re8; 9.Qc2 Bd4 10.Nd4 Nb6 11.Bd3 0-0 12.0-0 Re8) 9...Bd4 10.Nd4 0-0 11.0-0 Nb6 12.Qc2 Bg4.

7.cd5 ed5 8.Be2 Bd6 (8...a3 9.Bd4 c5 10.bc6 bc6 11.Qc1 Qc7 12.0-0 Bd6) 9.Bd4 (9.0-0 0-0 10.Bd4 c5 11.bc6 bc6 12.Nc3 a3) 9...c5 10.bc6 bc6 11.Nc3 a3 12.Rb1 0-0.

7.cd5 Nd5 A) 8.e4 Nf4 (8...N5f6 9.Qc2 Bb4 10.a3 Be7 11.d4 0-0 12.Bd3 Nh5) 9.Bd4 (9.Qc2 Bd6 10.Bg7 Rg8 11.Bc3 Ng2 12.Bg2 Rg2; 9.d4 Bd6 10.Qd2 Ng6 11.e5 Be7 12.Bd3 a3) 9...e5 10.Ne5 Nc5 11.Bc3 f6 12.g3 fe5; B) 8.a3 B1) 8...N7b6 9.Qc2 (9.Nc3 Nf6 10.d4 Be7 11.Bd3 0-0 12.0-0 Bd7 ; 9.Bd4 f6 10.Bb6 Nb6 11.d4 Bd7 12.Bd3 Bd6) 9...Bd7 10.e4 Nf6 11.Nc3 Be7 12.d4 c6; B2) 8...N7f6 9.Qc2 Be7 10.e4 Nf4 11.Nc3 0-0 12.Na4 Ng6; C) 8.Bd4 C1) 8...f6 9.e4 (9.Nc3 Bd6 10.Na4 e5 11.Bc4 Ne7 12.Bc3 e4) 9...N5b6 10.Be2 Bd6 11.0-0 e5 12.Be3 0-0; C2) 8...N5f6 9.Nc3 (9.Bf6 Qf6 10.Nc3 Nb6 11.Bd3 Nd5 12.Ne4 Qd8 ) 9...Bd6 10.Na4 0-0 11.Qc2 e5 12.Bc3 Qe7.

6.Be2 Bd6

7.0-0 0-0

8.a4 e5 9.d3 c5 10.c4 dc4 11.dc4 Qc7 12.g3 e4 13.Nfd2 b6 14.Nc3 Bb7 15.Qc2 Rfe8 16.Rad1 Rad8 17.Rfe1 Be5 18.Bf1 ½–½. Cornacchini,Gabriele – Dunn,Paul Michael (1775), IECC, 1999.

8.c4 dc4 9.Bc4 Nb6 10.Be2 Nbd5 11.Nc3 Nc3 12.Bc3 Ne4 (12...Qe7 13.Qc2=) 13.Bd4+= Bc5 (better 13...b6!?+=) 14.Bc5+– Nc5 15.Qc2 b6 16.d4 Nd7 17.Rac1 Ra7 18.Bd3 g6 19.Rfd1 Qe7 20.e4 Rd8 21.h3 Nf6 22.Ne5 Bb7? (better 22...Bd7!?+–) 23.Qc7+– Be4 (23...Qc7 24.Rc7 Rd4 25.f3+–) 24.Qe7 Re7 25.Be4 Ne4 26.Nc6 Red7 27.Nd8 Rd8 28.Rc6 Rb8 29.d5 ed5 30.Rd5 Nc5 (30...Kg7 31.f3 Nc5 32.Rdd6+–) 31.Rdd6 Na4 32.Rc7 Re8 (32...Kg7 33.g4 Nc5 34.Kg2+–) 33.Rc4 (33.Rf6 Rf8 34.Rc4 Kg7+–) 33...Nb2 34.Rf4 Re1 (34...Kf8 35.Rb6 Nd3 36.Rf3+–) 35.Kh2 Ra1 (35...Kf8 36.Rb6 Nd3 37.Rb8 Kg7 38.Rf3+–) 36.Rb6 Ra2 (36...Nd3 37.Ra4 Kg7+–) 37.Rb7 Nd3 (37...Ra4 38.Rff7 Rd4+–) 38.Rff7 Nc5 (38...Re2 39.Rfd7 Re8 40.Rd3 g5+–) 39.Rg7 Kf8 40.Rbf7 Ke8 41.Ra7 Kf8 42.Rh7 Kg8 43.Rhg7 Kf8 44.Rgc7 Re2 45.Ra8 Re8 46.Re8 (46.Rc5?! Ra8 47.b6 Kg7+–) 46...Ke8 47.Rc5 Kd7 (47...Ke7 48.b6 Kd6 49.Rc8 g5 50.b7 Ke7 51.b8Q Kd7 52.Qc7 Ke6 53.Qb6 Kf5 54.Rc5 Ke4 55.Qb3 a4 56.Qe3) 48.b6 a4 (48...Kd6 49.Rc8 g5 50.b7 Kd5 51.b8Q Ke4 52.Qd6 g4 53.hg4 a4 54.Re8) 49.b7 Kd6 50.Rc8 Kd5 (50...Kd7 51.b8Q a3 52.Rd8 Ke6 53.Qd6 Kf5 54.g4 Ke4 55.Kg3 a2 56.Qd4) 51.b8Q a3 (51...g5 52.Qb5 Ke6 53.Rc6 Kf7 54.Qb7 Kf8 55.Rc8) 52.Qb5 Ke6 53.Rc6 Kf7 (53...Kd7 54.Qb7 Ke8 55.Rc8) 54.Qb7 (54.Qb7 Kf8 55.Rc8) 1–0. Janek – Hollek, internet, 2018.

8.d3 c6 9.c4 cb5 10.cb5 b6 11.a4 Bb7 12.Nbd2 (12.Ba3 Ba3 13.Na3 Rc8=) 12...Rc8 13.Rc1 Qe7 14.Nb3 (14.Nd4 Rc1 15.Bc1 Rc8=) 14...e5=+ 15.Rc8 Rc8 16.Qa1 e4 (17.Nfd2 Ne5=; 16...Qe6 17.Rc1=+). St_Jean,Benoit – Chvalovsky,Karel, CC.2003.0.00064, 2003.

8.d3 Qe7 9.Nbd2 =.

8.d4 c5 9.c4 b6 10.Nc3 (10.cd5 ed5 11.dc5 bc5=) 10...Bb7 11.Na4 (11.cd5 Nd5 12.Qd2 Rc8=) 11...Ne4 (11...cd4 12.Qd4 e5 13.Qh4=) 12.Rc1 Rc8 13.Nd2 (13.dc5 Ndc5 14.Nc5 Nc5=) 13...f5 (13...Qc7 14.f4=+) 14.f4 cd4 15.ed4 (15.Ne4 A) < 15...de4 16.Qd4 (16.Bd4?! Bb4=; 16.ed4?! Qc7=) 16...Qe7 17.Rcd1+/– (< 17.Nb6 Nb6 18.Qb6 Bc5 19.Qa5 Be3 20.Kh1 Ra8=+); B) 15...fe4 16.Bd4 Ba3=) 15...g5 (15...Qh4 16.Ne4 fe4 17.g3=) 16.Ne4= fe4 17.c5 Bf4 (17...bc5 18.dc5 Nc5 19.Qd4=) 18.c6 (better is 18.Rc3!? Ba8 19.Bg4+=) 18...Bc1–/+ 19.cd7? (better is 19.Bc1 Bc6 20.Rf8 Nf8 21.bc6 Rc6 22.Be3=+) 19...Be3–+ 20.Kh1 Rf1 21.Qf1 Rb8 22.Bg4 Qd7 23.Nb6 Qf7 24.Qf7 Kf7 25.Nd7 Rc8 26.Nc5 Rc5 27.dc5 Bc5 28.g3 d4 29.Kg2 e5 30.Kf1 Bd5 31.a4 Bc4 32.Ke1 Kg6 33.Be2 d3 34.Bd1 Kf5 35.h3 e3 36.Bg4 Ke4 37.Bd1 Bb4 38.Kf1 e2 39.Kf2 e1Q 40.Kg2 Qd2 41.Kg1 Qd1 (42.Kf2 Bc5 43.Bd4 Bd4 44.Kg2 Qg1) 0–1. Gould,W – Platz,J, New Haven m, 1965.

8.d4 c6 =.

4.Bb2 Be7

5.e3 0-0 6.d3 d5 7.Be2 Bd7 8.0-0 (8.c4 c6 9.Nc3 cb5 10.cb5 a4 11.Na4 Bb5=) 8...Bb5=+ 9.Ne5 c5 10.Nd2 Nc6 11.f4 Qc7 12.Ndf3 Rad8 13.Qe1 White launches an attack 13...Kh8 (better 13...Nb4!? 14.Qb1 Ba4–/+) 14.Ng5 Ne5 (14...Kg8 15.Ngf3 Nb4–/+) 15.fe5+– Nd7 (better 15...Ng4!? 16.Nf7 Rf7 17.Rf7 Ne3+=) 16.Nf7+– Rf7 (16...Kg8 17.Nd8 Qd8+–) 17.Rf7 Bg5 18.Qg3 Bh6 19.Raf1 Qc8 (19...Ba4 20.Qf2 Rg8 21.Bg4+–) 20.R1f4 (better 20.e4 de4 21.Bc1+–) 20...Ne5?? (20...Rf8+–) 21.Be5 Rg8 22.Rh4 Be8 (22...Ba6 23.Rh6 Qf8 24.Qg6 Qf7 25.Rh7) 23.Rh6 Bf7 24.Rh7! Kh7 Decoy theme: h7 25.Qh4 Kg6 (25...Bh5 26.Qh5) 26.Qh5 1–0. wvmaniac – workchess, net–chess.com, 2020.

5.e3 b6 6.c4 0-0 7.Bd3!? h6 (7...Bb7=) 8.0-0 Bb7 9.Nc3 d5 10.cd5 ed5?! (10...Nd5 11.e4 Nb4 12.Bc4=) 11.a4 Nbd7 (11...c5!+=) 12.Qc2 Nc5 13.Bf5 Re8 14.d4 Ncd7 15.Ne5 Ne5? 16.de5 Nd7 17.e6 fe6 18.Be6 Kh8 19.Nd5 Bd5 20.Bd5 Ra7 21.Bf7 Rf8 22.Bg7!! Kg7 23.Qg6 Kh8 24.Qh6 1–0. Sternik,Ryszard – Lowry,Paul, email b4–01–05, 2001.

5.e3 b6 6.Be2 Bb7 7.0-0 d6 8.c4 Nbd7 9.d4 c6 (9...Ne4 10.Nfd2+=) 10.Nc3 (10.bc6 Bc6 11.Nc3 0-0+=) 10...0-0 (10...c5 11.d5 ed5 12.cd5+= (12.Nd5?! Nd5 13.cd5 Bf6=)) 11.bc6 Bc6 12.Rb1 d5 13.cd5 ed5 (13...Nd5 14.Rc1+=) 14.Bb5 Rc8 15.Qe2 Bb4 16.Rfc1 (16.Ba6 Rc7+=) 16...Nb8 (better 16...Bc3!? 17.Bc3 Bb5 18.Qb5 Qe7+=) 17.Ne5+– Qd6 18.Bc6 (18.Bd3!?+–) 18...Nc6+= 19.Nb5 Ne5?? (better 19...Qe6+=) 20.Nd6+– Rc1 21.Rc1 Bd6 (21...Ned7 22.Nc8 Re8+–) 22.de5 Be5 23.Be5 Ne4 24.Qg4 f6 25.Qe6 Kh8 26.Rc8 Rc8 (26...h5 27.Rf8 Kh7 28.Qf7 Ng3 29.hg3 Kh6 30.Rh8 Kg5 31.Qh5) 27.Qc8 1–0. samyaksamadhi – vaingrecsky, net–chess.com, 2019.

4.d4 d5

5.e3 c5 6.Ba3 Nbd7 7.c4 Be7 8.cd5 ed5 9.Be2 0-0 10.Nc3 c4 11.Be7 Qe7 12.Qc2 (12.0-0 Re8=) 12...Nb6+= 13.Ne5 (13.0-0 Ne8+=) 13...Ne8 14.0-0 f6 15.Nf3 Nd6 16.Nd2 Bf5 17.Qb2 Rfd8 18.Bf3 (18.h4 Qe6+=) 18...Nf7 19.a4 Rac8 20.Rac1 Ng5 21.Bh5 (21.Be2 Rc7+=) 21...Qb4 (21...Bd3 22.Rfe1+=) 22.Qa2 Bd3 23.Rfe1 g6 24.Bg4 (24.Be2 Kg7+=) 24...f5 25.Be2 Kg7 26.h4 (26.g3 Ne4 27.Nde4 fe4–/+) 26...Ne4–/+ 27.Nde4 de4 28.h5 (28.Qa1 Rc7–/+) 28...Nd5 29.Qa1 (29.Nd5 Rd5 30.Kh2 Rdd8–/+) 29...Nf6 30.hg6 (30.Qa2 gh5 31.f3 h4–/+) 30...hg6 31.Qa2? (better is 31.g3!?–/+) 31...Rh8–+ 32.Qa1? (32.Red1 Rh6 33.f3 Qd6–+) 32...Rh6 (32...Rh7 33.f4 Rch8 34.Kf2–+) 33.f3 (33.f4 Rch8 34.Kf2 Rh2–+) 33...Rch8 34.Kf2 (34.Bd3 cd3 (worse is 34...ed3 35.Kf2 d2 36.Red1 dc1R 37.Qc1–+) 35.Ne2 Nd5–+) 34...Rh2 35.fe4 (35.Rf1–+) 35...Qc3!! 36.Bd3 (36.Qc3 Ne4 Double attack (36...Ne4 Decoy); 36.Rc3 Ne4 Mate attack) 36...Qd3 37.d5 Rg2! 38.Kf3 Qe4 0–1. decu40 (1930) – cachisss (1940), gameknot.com, 2015.

5.e3 c6 6.c4 Bb4 7.Bd2 Be7 8.Nc3 0-0 9.c5 =.

5.Bf4 Bb4 6.c3 Be7 7.e3 0-0 8.Bd3 c6 9.a4 =.

4.e3 d5

5.Bb2 (--> 4.Bb2 d5 5.e3).

5.c4 Bb4 6.Be2 0-0 (6...dc4 7.Bc4 Nbd7 8.0-0=) 7.0-0 dc4 8.Bc4 b6 (8...c6 9.d4=) 9.Bb2 (9.d4 Bb7=) 9...Bb7 10.d4 c6 11.Ba3 Nbd7 12.bc6 Bc6 13.Bb4 ab4 14.Nbd2 Ba4 15.Qb1+= Qe7 16.Rc1 b5 17.Bd3 Rfc8 18.Qb2 Nd5 19.Ne4 f5+= 20.Ng3 Rc3 21.Qd2 N7b6 22.Ne5 Rac8 23.Ne2 Qc7 24.Nc3+– bc3 25.Qe2 b4 26.Ba6 Ra8 27.Bb5 Qa7 28.h3 Qa5 29.Bd3 Be8 30.Qf3 b3 31.ab3+– Qa1 32.Ra1 Ra1 33.Kh2 Ra2 34.e4 fe4 35.Qe4 g6 36.h4 Rf2 37.Ng4 Rf4 38.Qe6 Bf7 39.Nh6 Kg7 40.Nf7 Rf7 41.h5 Re7 42.Qg4 Ne3 43.h6 Kg8 1–0. Ganesan – Domenche Redondo, corr 3GMM–19, 1997.

5.Be2 Bd6 6.d4 Qe7 7.0-0 0-0 8.c4 dc4 9.Qc2 =.

5.Be2 Nbd7 =.

3.Nf3 g6

4.d4 d5 5.c4 c6 6.bc6 bc6 7.e3 Bg7 8.Be2 (8.Nc3 0-0+=) 8...0-0 9.0-0 (9.0-0 c5 10.dc5=). jnunes33 (2225) – antinephilehi (2100), gameknot.com, 2018.

4.g3 c6 5.Na3 Bg7 6.Rb1 d5 7.c4 Nbd7 8.Bg2 0-0 9.0-0 Ne4 10.Bb2 =. Smyslov – Alvarez, Havana 1962.

4.a4 Bg7

5.Bb2 0-0 6.e3 d6 7.d4 Nbd7 8.Nbd2 b6 9.Bd3 Bb7 10.0-0 e5 11.de5 Ng4 12.Nd4 Nde5 13.h3 Nh6 14.f4 Nd7 15.Nc4 (15.e4 Nc5=) 15...Nc5 16.Nc6 (16.Nb3!?=) 16...Qe8 (16...Bc6 17.Bg7 Kg7 18.bc6–/+) 17.Bg7=+ Kg7 18.Qf3 f5 19.Qd5 (19.Nd2 Nf7–/+) 19...Ng8 20.Qd4 Nf6 21.g4 fg4 (21...Nd3?! 22.cd3 fg4 23.hg4 Bc6 24.bc6+=) 22.hg4 Kg8 (22...Nd3?! 23.cd3 Bc6 24.bc6+=) 23.g5 Ne6 24.Qb2 Nh5 25.Nd2 (25.Nd4!?=+) 25...Ng5! 26.Qd4 (26.fg5 Qe3 Double attack) 26...Ne6 27.Bc4 Bc6 28.bc6 Qf7 29.Qe4 Rae8 30.Qg2 Kh8 31.Rf3 Qf6 32.Raf1 Neg7 33.Bd3 Nf5 34.Ne4 (34.Qf2 d5–+) 34...Qe7 (34...Qb2 35.Qd2–+) 35.Rh3 (35.c4 Nf6 36.Qb2 Qg7 37.Nf6 Rf6–+) 35...d5 (35...d5 36.Nc3 Ne3 37.Nd5 Ng2 38.Ne7 Re7 39.Kg2 Nf4 40.Kh2 h5–+) 0–1. Galindo,Gustavo – Cadena M,Gustavo Adolfo (2070), IRT Open de Ajedrez Ciudad de Cartago, 2010. (=1.Nf3 Nf6 2.b4 a5 3.b5 g6)

5.Bb2 d5 6.e3 0-0 7.c4 c6 8.c5 Nbd7 9.d4 Ne4 10.b6?? (better is 10.Qc2=) 10...Ndc5!–+ 11.dc5 (11.Nbd2 Nd2 12.Nd2 Na6–+) 11...Bb2 12.Ra2 Bc3 13.Nc3 Nc3 14.Qb3 Na2 15.Qa2 f6 16.Bd3 e5 17.Nd2 Qe7 Black prepares e4 18.Qa3 f5 Black intends e4 19.0-0 e4 20.Be2 f4 21.ef4 Rf4 22.Qe3 Qf8 23.Bd1 Bd7 24.Nb3 Qf7 25.Nd4 Rf8 26.Bb3 Qe7 27.Ne2 Rf3! 28.gf3 Rf3 29.Bd5 cd5 30.Qd2 Qc5 31.Nd4 e3 32.fe3 Rf1 33.Kf1 Ba4 34.Ne6 Qb6 35.Nf4 Qb1 36.Kf2 Qc2 37.Qc2 Bc2 38.Nd5 a4 0–1. Partikas,Valentinas A (2375) – Winfridsson,Ola, ICCF corr Baltic Sea tt–7 bd13, 2002. (=1.Nf3 Nf6 2.b4 a5 3.b5)

4.Bb2 Bg7

5.e3 c6 6.a4 0-0 7.Be2 d5 8.0-0 Nbd7 9.c4 (9.d4 cb5 10.ab5 Nb6=) 9...Re8 (9...cb5 10.cb5 Nc5 11.Bd4=) 10.d4 dc4 11.Bc4 (11.Nbd2 cb5 12.ab5 c3 13.Bc3 Nd5+=) 11...Nb6 12.Be2 Nfd5 (12...cb5 13.Bb5 Bd7 14.Qb3+=) 13.bc6 bc6 14.Nc3 (14.Nbd2 c5+=) 14...Nc3 (14...Rb8 15.Qc2+=) 15.Bc3 ½–½. Vadasz,H – Portisch,Ferenc, Trnava, 1981. (=1.Nf3 Nf6 2.b4 a5 3.b5 g6 4.Bb2 Bg7)

5.e3 d6 6.Be2 e5 7.d4 Nbd7 8.c4 0-0 9.Nc3 Re8 10.0-0 ed4 11.ed4 (11.Nd4 Nc5=) 11...Nf8 (11...Nb6 12.Qb3=) 12.Re1 Bf5 'Twofold repetition' 13.Nh4 Bc8 (13...Be6 14.Bf3 N6d7 15.d5 Qh4 16.de6 Re6 17.Bb7 Rae8 18.Re6 fe6=; 13...Bd7 14.Qd2 a4 15.a3 Bc8 16.Nf3 d5 17.Rad1 Be6 18.c5 Ne4+=; 13...Bg4 14.Bg4 Re1 15.Qe1 Ng4 16.Nf3 Nf6 17.d5 Qd7 18.Ne4 Ne4+=) 14.Nf3 (14.Qd2 d5 15.Nf3 Bg4 16.h3 Be6 17.c5 Ne4 18.Qc2 Nd7=) 14...Bf5 15.Nh4 (15.Rc1 Bh6 16.Nd2 Ne6 17.Bf3 Nd4 18.Re8 Qe8=) 15…Bc8 ½–½. Tsvetkov,Alexandar K – Neikirkh,Oleg, BUL–ch, 1962.

5.e4 0-0 6.e5 Nd5 7.Be2=.

5.e4 d6 6.Bc4 0-0 7.d3 (7.Qe2 Nbd7=) 7...Nbd7 (7...c6 8.bc6 bc6 9.0-0=) 8.a4 (8.0-0 e6 9.a3 d5 10.ed5 ed5=) 8...c6 9.Nbd2 (9.Nc3 d5 10.ed5 Nd5=) 9...Qb6 (9...d5 10.Bb3=) 10.Rb1 (10.0-0 d5 11.bc6 bc6+=) 10...Qc7 11.0-0 e5 (11...d5 12.bc6 bc6 13.Bb3+=) 12.Re1 (12.bc6 bc6 13.Re1 Rb8=) 12...Nc5 (12...Nb6 13.c3=) 13.b6 Qd8 14.c3 Re8 (14...Ncd7 15.Ba3 Nb6 16.Bd6 Qd6 17.Rb6=) 15.Ba3+= Ne6 16.Qb3 (16.Bb3 c5+=) 16...Kh8 (16...Bh8 17.Nf1+=) 17.d4 (17.Nf1 Kg8+=) 17...ed4 18.cd4 d5 19.ed5 Nd5 20.Ne5 ½–½. Gelardi,Davide (1850) – Iannello,Andrea (1920), 5th Terre Degli Elimi Open, 2014.

4.c4 Bg7

5.Bb2 d6 6.e3 Nbd7 7.d4 0-0 8.Nc3 Re8 9.Be2 e5 10.de5 Ne5 11.Ne5 de5 12.Qb3 Bf5 13.Rd1 Qe7 14.Ba3 Qe6 15.0-0 e4 16.Bc5 Bg4= 17.Bd4 Be2 18.Ne2 a4 19.Qb4 Bf8 20.Bc5 Bc5 21.Qc5+= Qe5 22.Qe5 Re5 23.Nc3 a3 24.Rd4 Kg7 25.Rfd1 c6 26.Kf1 Re6 27.Ke1 h6 28.h3 Ree8 29.Ke2 Re5 30.Rb1 Re6 31.bc6 bc6 32.Rb3 Re5 33.Rd6 Ra6 34.Rb7 g5 35.Rc7 Ne8 36.Rcc6 Nd6 37.Ra6 Nc4 38.g4 Re8 39.Ra4 Nd6 40.Ra3 Kf6 41.Ra6 Ke5 42.Rc6 Ra8 43.Rc5 Ke6 44.a4 Ra6 45.a5 Nb7 46.Ne4 Ra5 47.Ra5 Na5 48.f4 gf4 49.ef4 Nc6 50.Ng3 Ne7 51.Ke3 Kd5 52.h4 f6 53.h5 Kd6. Van Rooijen,Peter – Warren,Robert, C2.2000.0.00282, 2000.

5.d4 d6 =.

5.e3 0-0 6.d4 d6 7.Nc3 e5 8.Be2 Nbd7 9.0-0 Re8 10.Qb3 e4 11.Nd2 +=. Ashwad (1820) – StephenHilton, internet, 2006.

5.Bb2 0-0

6.d4 d5 =.

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

6.g3 c6 7.a4 d5 8.c5 Bd7 9.Qb3 Qc8 10.d4 Bh3 11.Nbd2 Ne4 12.Ne4+= Bf1 13.Rf1 de4 14.Nd2 Rd8 15.Qe3 Qd7 16.Nc4 Qe6 17.Nb6 Ra7 18.d5 cd5 19.Bg7 Kg7 20.Rd1 Qe5 21.f4 Qh5 22.f5+/– gf5 23.Rd5+– Rd5 24.Nd5 Nc6 25.bc6 bc6 26.Nb6 f6 27.g4! fg4 28.Qe4 Qh4 29.Kd1 Qh3 30.Rg1 h5 31.Kd2 Qa3 32.Ra1?? Qa1–+ 0–1. Springall,JH – Harwood,Stanley, corr ENG–ch sf, 1986.

6.g3 c6 7.Bg2 =+.

6.g3 d5 7.cd5= Qd5 8.Nc3 Qc5 9.Bg2 Qb4 10.Qc1 Ne4 11.Rb1 Nd6 12.Nd5+– Bb2 13.Rb2 Qc4 14.Qc4 Nc4 15.Rc2 Nd6 16.Nc7 Bf5 17.d3 Ra7 18.b6 Ra6 19.Na6 Na6 20.Nd4 Bd7 21.0-0 Nb4 22.Rc7 (22...Rd8 23.Bb7 Nb7 24.Rb7+–) 1–0. Hakulinen,Heikki – Wolfram,Reinhard, corr 3GMM–47, 1994.

6.g3 d6 7.Bg2 e5 8.d3 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.g3 d6 6.Bg2 e5 7.d3 a5 8.b5).

4.d4 Bg7

5.Bb2 0-0 6.a4 d5 7.Nbd2 c6 (7...Nbd7 8.c4+=) 8.e3= Bf5 9.c4 Nbd7 10.bc6 bc6 11.cd5 cd5 (worse is 11...Nd5 12.e4 e5 13.Bc4+/–) 12.Ba3 Rc8 (12...Ne4 13.Rc1 Nd6 14.Be2+=) 13.Rc1 Nb6 (13...Ne4!?+=) 14.Ne5+= Bd7 Attacks the isolani on a4 15.Nd7 (15.Bb5 Be8+=) 15...Qd7 16.Bb5 Rc1 17.Qc1 Qg4 (17...Qb7 18.0-0+=) 18.0-0+/– Rc8 19.Qb1 e5 (better is 19...Qe6!?+=) 20.Ba6+– Rc6 21.Bb7 (21.de5 Nfd7 22.Bb5 Rc3+–) 21...Re6 22.h3 Qf5 (22...Qh5 23.de5 Qe5 24.Rc1+/–) 23.de5 (23.Nf3 Nfd7+/–) 23...Qe5+= 24.Rc1 Nfd7? (better is 24...d4!? 25.Bc6 de3 26.Qb6 ed2 27.Qd8 Re8 28.Qd2 Rc8+=) 25.Bc6+– h6 (25...Re8 26.Qb5 Rd8 27.Nf3+–) 26.Qb5 d4 27.ed4 (27.Bd7 Nd7 28.Qd7 de3 29.Rc8 Kh7 30.Qf7 ef2 31.Kh1 Qe1 32.Kh2 Qg1 33.Kg3 h5 34.Qe6 h4 35.Kf4 f1Q 36.Nf1 Qf1 37.Ke4 Qg2 38.Kd3 Qf1 39.Kc2 Qg2 40.Kb3 Qf3 41.Kc4 Qa3+–) 27...Qb5 28.Bb5 Bd4 29.Nb3 Bf6 30.Na5 Bg5 31.Rd1 Ne5 32.Rd6 Rd6 33.Bd6 Bf4 (33...Bd2 34.Nb7 Nec4 35.Bc5+–) 34.Bc5 (34.Nb7 Nc8 35.Bc5 g5+–) 34...Ned7?! (34...Nd5+–) 35.Bd4 Bc7 (35...Kf8 36.Nc6+–) 36.Nb3 (36.Nb7 Nf8+–) 36...Nf8 37.a5 Nc8 38.Bc6 (better is 38.Be3!? Kg7+–) 38...Ne6 39.Be3 Bb8 (39...Bf4+–) 40.Bd7 Na7 41.Be6 fe6 42.Bh6 1–0. Farkas,Miso – Jovanovic,Dusan P, Vojvodina Cup, 2008.

5.e3 0-0 6.c4 d6 (6...c5 7.Nc3=) 7.Be2 Nbd7 (7...Bf5 8.0-0=) 8.Bb2 e5 9.de5 de5 10.0-0 (10.Ne5 Ne4 11.Nd7 Bb2 12.Nf8 Qd1 13.Bd1 Kf8–+) 10...e4 11.Nd4 Re8 (11...Ne5 12.Nc3=) 12.Qc2+= Nc5 13.Nc3 Ng4 (13...Bg4 14.Rfd1 Be2 15.Nce2=) 14.Nd5 (14.h3 Ne5+=) 14...Qd6 (14...Ne5 15.Rab1=) 15.Bg4+/– Bg4 Black gets strong initiative 16.h3 (16.b6!? cb6 17.Nb5+–) 16...Bd7 (16...Be6 17.Ne6 fe6 18.Bg7 ed5+=) 17.Rad1 (17.Ba3!?+=) 17...Nd3= 18.Ba1 c6 19.Nf4 (19.Nb6 Rad8 20.Qc3 Qb4+=) 19...Nf4 20.Nf5 Qd3 (20...gf5 21.Rd6) 21.Rd3 ed3 22.Qd2 (better is 22.Nh6! Bh6 23.Qb2+/–) 22...Ne2+= 23.Kh1? (better is 23.Kh2 Bf5 24.Bg7 Kg7 25.g4 cb5 26.cb5 Bg4 27.hg4+=) 23...Bf5–+ (23...gf5? 24.Qd3 Ba1 25.Ra1+– (25.Qd7?! Bg7=; 25.Qe2 Be5–/+)) 24.Bg7 Kg7 25.bc6 bc6 26.Kh2 Red8 27.f3 Be6 28.c5 Bc4 29.e4 f6 30.Rb1 Rd7 31.h4 h6 32.g4 Rad8 33.Kg2 g5 34.hg5 hg5 35.Re1 Kg6 36.Kf2 Rh8 37.Ke3 Nd4 38.Rc1 Nc2 39.Rc2 dc2 40.Qc2 Rd3 (40...Rd3 41.Qd3 Bd3 42.Kd3 Rh2–+) 0–1. Marval – Garcia,R, Buenos Aires, 1990. (=1.Nf3 Nf6 2.b4 a5 3.b5 g6)

4.e3 Bg7

5.Bb2 0-0 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.b5 0-0 5.Nf3 a5).

5.Bb2 0-0 6.Be2 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 0-0 5.Be2 a5 6.b5).

5.d4 0-0 6.c4 b6 7.Be2 Bb7 8.0-0 d6 9.Nc3 Nbd7 10.a4 Ne4 11.Ne4 Be4 12.Bd3 (12.Nd2 Bb7=) 12...Bd3 (12...Bb7 13.Bb2+=) 13.Qd3= e5 14.Bb2 Qe7 15.de5 Ne5 16.Ne5 Be5 17.Bd4 Rae8 18.Rad1 Qf6 19.h3 Re7 20.Rd2 Rfe8 21.Rfd1 Qh4 22.Qe2 f5 23.Qf3 Qf6 24.Qc6 (24.Be5 Re5 25.Qb7 Qf7=) 24...f4+= 25.Be5 Qe5 26.ef4 Qf4 27.Rd4?? (better is 27.g3 Qe4 28.Qd5 Kg7 29.Kf1+=) 27...Re1 0–1. phildo (1920) – baitang (1960), gameknot.com, 2014.

4.g3 Bg7

5.Bb2 0-0 6.Bg2 d6 7.0-0 e5 8.d3 Nbd7 9.c4 Re8 10.e4 a4 11.Nc3 Nc5 12.Ba3 Nfd7 13.Ne1 Nb6 14.Nc2 Ne6 15.Nd5... 1–0 (40.). Arnaudov – Kupka, 1971.

5.Bb2 0-0 6.Bg2 d6 7.d4 Nbd7 8.c4 e5 9.0-0 ed 10.Nd4 Re8 11.Qc2 Nc5 12.Nc3 Ne6 13.Ne6 fe 14.c5 d5 15.Rad1 c6 16.bc bc 17.Na4 Nd7 18.Bg7 Kg7 19.Rb1 Qf6 20.Nb6 Nb6 21.Rb6 Bd7 22.Rfb1 Rf8 23.e3 Rf7 24.Qb2 Qb2 25.R1b2 a4 26.Bf1 a3 27.R2b3 Ra5 28.Rc3 Be8 29.f4 Re7 30.Kf2 h6 31.Bd3 g5 32.Rb4 Kf6 33.e4 gf 34.gf e5 35.ed cd 36.Rb6 Kg7 37.fe d4 38.Rc4 Re5 39.Rb7 Kf6 40.Rd4 Rac5 41.Rf4 Kg5 42.h4 Kh5 43.Rg7 Rc3 44.Be4 Re4 45.Re4 Bc6 46.Rc7 Rc2 47.Re2 Rc4 48.Re3 Kh4 49.Re6 Rf4 50.Ke3 Rf3 51.Ke2 Bd5 52.Rh6 Kg5 53.Ra6 Rf5 54.Ra3 Kf4 55.Re7 Rh5 56.Ra4 Kf5 57.Kd3 Rh3 58.Re3 1–0. Barcza – Hecht, Hamburg 1965.

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

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