2…Be6 3.e3 g6 (3...Bf5 4.Bb2=) 4.Bb2 f6 5.c4 dc4 6.Ng5 Qd7 7.Ne6 Qe6 8.Qc2 b5 9.Nc3 c6 10.a4 Nd7 (10...Na6 11.ab5 Nb4 12.Qa4 Nd3 13.Bd3 cd3 14.bc6+–) 11.ab5+– c5 (better 11...Nb6!?+–) 12.Ra6+– Qf7? (better 12...Qg4 13.Nd5 Rc8+–) 13.Qe4 Rc8 (13...Rb8 14.Bc4 Qg7+–) 14.Bc4 Qg7 15.b6 Nb6 (15...f5 16.Qb7 Rb8 17.Qb8 Nb8 18.ba7 Qe5+–) 16.Qe6 Kd8 17.Ra7 f5 (17...Rc7 18.Qb6 Ke8 19.Rc7 cb4 20.Qb8) 18.Qb6 Ke8 19.Qb5 Kd8 (19...Rc6 20.Qc6 Kd8 21.Qd7) 20.Qd7 1–0. pcmvr – mi, net–chess.com, 2018.

2...f5 (--> 1.b4 f5 2.Nf3 d5).

3.Bb2 (--> 1.b4 d5 2.Bb2 d4 3.Nf3).

3.c3 dc3 4.Nc3 e5 5.Ne5 +=.

3.c3 dc3 4.Nc3 Nf6 5.e4 Bg4 6.Be2 Bf3 7.Bf3 e5 8.a3 a6 9.Bb2 Bd6 10.Nd5 Nd5=+ 11.ed5 0-0 12.Be4 Re8 13.Qf3 Nd7 14.Qh3 Nf6 15.0-0?? Ne4–+ 16.Qe3 Nf6 17.Qd3 c6 18.dc6 bc6 19.Qc3 Rc8 20.d3 Nd5 21.Qb3 h6 22.Rac1 Kh8 23.Rfe1 f6 24.d4 e4 25.h3 f5 26.Qa4 Qd7 27.Qa6 f4 28.f3 e3 29.Rc2 Re6 30.b5 c5 31.dc5 Bc5 32.Qa4 Bd6 33.Rc8 Qc8 34.Rc1 Qb7 35.Qd4 Be5 36.Qe5 Re5 37.Be5 e2 38.Bd4 Qe7 39.Re1 Qb7 40.b6?? Nb6 41.Re2 Kh7 42.Rb2–/+ Qa6 43.Bb6? Qa3–/+ 44.Re2 h5 45.Bd4 g5 46.Re6 Qb3 47.Re7 Kg8 48.Rg7 Kf8 49.Rg5? Qd1–+ 50.Kh2 Qd4 51.Rh5 Ke7 52.Rh7 Kf6 53.Rh6 Kg5 54.Rh7 Qf2 55.Rg7 Kh6 56.Rf7 Qg3 57.Kg1 Kg6 58.Rf8 Qe1 59.Kh2 Qb4 60.h4 Qf8 61.Kh3 Qf5 62.g4 Qd3 63.h5 Kg5 64.h6 Qf3 65.Kh2 Kh6 66.g5 Kg5 (66...Kg5 67.Kg1 Qe2 68.Kh1 f3 69.Kg1 Qg2#) 0–1. ajeffries (2065) – iboyd (2155), net–chess.com, 2009.

3.c3 e5 4.Ne5+= dc3 5.Nc3 Bb4?? (better is 5...Nd7 6.Nd3 Ngf6+=) 6.Qa4+– Bd7 (6...Nd7 7.Nf7 (7.Qb4 Ne5 8.d4 Nc6=+) 7...Kf7 8.Qb4+/–) 7.Qb4 Ne7 (7...Nc6 8.Qc5+–) 8.d3 (better is 8.Qb7!? Bc6 9.Nc6 Nbc6+–) 8...Nbc6 9.Nf7 (better is 9.Nc6 Bc6 10.e4+–) 9...Nb4+/– 10.Nd8 Nc2 11.Kd1 Na1 12.Nb7 Rb8 13.Nc5 Bc6 (14.e4 Rf8+/–; 13...Rf8!? 14.N3e4 Bf5+=). MC Q – Goof, ChessWorld.net, 2005.

3.d3 e6 4.a3 c5 5.b5 (5.c3 Nf6=) 5...Qa5 6.c3 dc3 7.Qc2 Qb5 (7...a6!? 8.ba6 Na6 9.Nc3 Nb4=) 8.Nc3+= Qc6 9.e4 Nd7 10.d4 c4 (better is 10...Ngf6!?=) 11.d5+/– ed5 12.Nd5 b5? (12...Ne7!? 13.Bc4 b5+–) 13.Bf4 (13.Nd4 Qg6 14.Nc7 Kd8 15.Na8 Bb7 16.Nb5 Ngf6+–) 13...Bd6? (better is 13...Bc5 14.a4 Qg6 15.Nc7 Kf8 16.Na8 Ngf6+–) 14.Rb1 (better is 14.Nd4 Qc5 15.Bd6 Qd6 16.Nb5 Qc6 17.Nbc7 Kf8 18.Na8 Qa8 19.Qc4 Qb7+–) 14...Ba3?? (better is 14...Bf4 15.Nf4 Ne7–/+) 15.Nc7 (better is 15.Nd4 Qg6 16.Nb5+–) 15...Kf8 16.Nd4 Qg6?? (better is 16...Qf6 17.Qd2 Bc5 18.Ndb5 Rb8 19.Bc4 Bb7+–) 17.Na8 Bc5 (17...Bb7 18.Rb5 Ba8 19.f3+–) 18.Nb5 Ngf6 (18...Bb7 19.Rd1 (19.Bc4?! Qg2 20.Bd6 Bd6 21.Nd6 Qh1 22.Ke2 Qh2 23.Nb7 Ngf6+/–) 19...Bb4 20.Bd2+–) 19.Qc4 (better is 19.Bd6 Kg8 20.Bc5 Nc5+–) 19...Ne4 20.Rb2 (better is 20.Be3 Bb7 21.Nac7 Be3 22.fe3 Qf5+–) 20...Ba6? (20...Qf6 21.Qc1 Qe7+–) 21.Qd5 Qe6 22.Nac7 Qd5 23.Nd5 h6 (23...g5 24.f3 gf4 25.fe4+–) 24.f3 Bb5 (24...g5 25.fe4 gf4 26.Na7 Ba7 27.Ba6+–) 25.Rb5 Bf2 (25...g5 26.Bc7 Nf2 27.Rc5 Nh1+–) 26.Ke2 Nc3 27.Nc3 Bd4 28.Kd3 Bb6 29.Kc2 Kg8 (29...g6 30.Bc4 Kg7 31.Rd1+–) 30.Bd3 Nc5 31.Bf5 g6 32.Bd6 Nb7 33.Be5 Rh7 (33...gf5 34.Bh8 Kh8 35.Rd1+–) 34.Nd5 gf5 35.Bc7 (better is 35.Ra1 Nd8 36.Rb6 ab6+–) 35...Bc7 (35...Rg7 36.g3 f6 37.Bb6 ab6 38.Rb6+–) 36.Rb7 Be5 37.h4 (better is 37.Re1 Rg7 38.Re5 Rg2 39.Kc3 Kh7+–) 37...a5 (37...Rg7 38.Re1 Rg2 39.Kd3+–) 38.Ne3 (better is 38.Re1 Bd6 39.Nf6 Kg7+–) 38...f4 (38...Rg7 39.Kd3 a4 40.Nf5+–) 39.Nf5 Kf8 (39...f6 40.Nh6 Kh8 41.Rh7 Kh7+–) 40.Rd1 Bf6 (40...Ke8 41.Re7 Kf8 42.Rd8) 41.Rb8 1–0. phi – stephenmason11, ChessWorld.net, 2014. (=1.Nf3 d5 2.b4 d4)

3.d3 Bf5 4.Bb2 e5 5.Nbd2 (better is 5.c3!?+/–) 5...Bb4= 6.Ne5 Nf6 7.e3 de3 8.fe3 0-0 9.c3 Bd6 10.Be2?? (better is 10.Nec4 Nc6 11.Be2+=) 10...Be5–+ 11.Nf3 Bd6 (better is 11...Nc6 12.0-0 Bd6 13.Nh4–+) 12.e4 Bg6 (better is 12...Bg4 13.e5 Bf3 14.Bf3 Be5 15.Bb7 Nbd7 16.Ba8 Qa8–+) 13.h3?? (better is 13.e5–+) 13...Bg3 14.Kf1 c6 15.a3 (15.Rb1 Qb6 16.Nd4–+) 15...Qb6 16.Qc2 (16.Nd4 Qb2 17.Qc1–+) 16...Qf2 0–1. calchess10 – stephenmason11, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 d4)

3.Bb2 e6 4.a3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Bd7).

3.e3= b6 4.Ng5 g6 5.Qf3 Bg7?? 6.Qf7# 1–0. ahmaro – bandeng, internet, 2007.

3.Bb2 (--> 1.b4 d5 2.Bb2 Nd7 3.Nf3).

3.Bb2 e6 (---> 1.b4 d5 2.Bb2 Nd7 3.Nf3 e6).

3.Nc3 Ngf6 4.Nd4? (better is 4.a3!?+=) 4...e5–+ 5.Nf5 g6 (5...Bb4?! 6.Ng7 Kf8 7.Nf5+=) 6.Ne3? (better is 6.Ng3 Bb4 7.e4 Bc3 8.dc3 de4 9.Qe2–/+) 6...d4 (6...Bb4?! 7.Ned5 Bc5 8.e3+=) 7.Ned5 Nd5 8.Nd5 c6 9.Nc3 dc3 10.dc3 Bg7 (10...a5 11.Bd2–+) 11.Qd6 (11.e4 0-0–+) 11...Qe7 12.Qd3 (12.Qe7 Ke7 13.e4 Rd8–+) 12...e4 13.Qc4 (13.Qg3–+) 13...Nb6 14.Qb3 (14.Qc5 Qc5 15.bc5 Bc3 16.Kd1 Be6–+) 14...Be6 15.Qa3 0-0 (better is 15...Nc4 16.Qb3 Qf6 17.e3 Qc3 18.Qc3 Bc3 19.Bd2 Bd2 20.Ke2–+) 16.Bf4 0–1. Fritz 11 – nnn, 2011.

3.d4 Ngf6 4.a3 g6 5.e3 Bg7 6.Bd3 0-0 7.0-0 Nh5 8.c4 dc4 9.Bc4 c5 10.bc5 Nc5 11.Nbd2 Bg4 12.h3 Bf3 13.Qf3 b6 14.g4 Nd7 15.gh5 Kh8 16.Bd5 e6 17.Ba8 e5 18.h6 Bh6 19.Bd5 ed4 20.ed4 Nf6 21.Bc6 Qd4 22.Nb3 Qh4 1–0. themonkey (1825) – NN, GameColony.com, 2002.

3.e3 Nb6 4.Be2 c6 5.Bb2 Bg4 6.0-0 Nf6 7.a4 Bf3 8.Bf3 Nc4 9.Bd4 e5 10.Bc3 Bd6 11.d3 0-0?? (better is 11...Nb6=) 12.dc4+– e4 13.Be2 Qc7 14.g3 h5 (14...Qe7 15.c5 Be5 16.Be5 Qe5 17.Qd4+–) 15.Nd2 (15.Bf6!? gf6 16.cd5 Bb4+–) 15...h4 (15...Be5 16.Bd4+–) 16.cd5 (16.Bf6 gf6 17.cd5 cd5+–) 16...cd5 (16...Nd5 17.Ne4 Nc3 18.Nc3 (18.Qd6?! Qd6 19.Nd6 Ne2 20.Kg2 hg3+–) 18...hg3 19.hg3 (19.fg3?! Bg3 20.Ne4 Bh2 21.Kg2 Rae8+–) 19...Bg3 20.Qd3+– (20.fg3?! Qg3 21.Kh1 Qh3 22.Kg1 Qg3 23.Kh1 Qh3 24.Kg1 Qg3=)) 17.Bf6 gf6 18.Bg4 (better is 18.c4!? Bb4 19.cd5 f5+–) 18...hg3 19.fg3 Rae8 (19...Bb4 20.Rb1 (20.Rf6?! Qc3 21.Rf2 Qe3+–) 20...Qc5 21.Qe2+–) 20.Rf6 (20.Bf5 Kh8 21.Qh5 Kg7 22.Qh7#) 20...Bb4 (20...Be5 21.Rf1 Ba1 22.Qa1+–) 21.Nb3 Qe7 22.Rh6 Kg7? 23.Rh4 Rh8 24.Rh8 Rh8 25.Nd4 Qg5 26.Kg2 Qe3 27.Qe2 Qd4–/+ 28.Rf1 Qd2 29.Qd2 Bd2 30.Rf5 d4 31.Rg5?? Kf6 32.Rb5? b6 33.Bd7 Rd8 34.Bc6 e3 35.Bf3 Rc8 36.g4 Rc2 37.Rf5 Kg6 38.h4? Bb4 39.Kg3 d3 40.h5 Kg7 41.Kf4 e2 42.Be2 de2 43.Re5 e1Q (43...e1Q 44.Re1 Be1–+) 0–1. decembernight – kedai55 (1640), kurnik, 2012.

3.ba5 Ra5 4.e3 Nf6 5.d4 Bf5 6.Bd2 Ra7 7.Nh4 Bg6 (7...Bg4!? 8.Nf3 Nbd7+=) 8.Ng6= hg6 9.Bd3 (9.c4 e6=) 9...e6 10.0-0 (10.Nc3 c6=) 10...Bd6 11.f4 Nbd7 12.Nc3 c6 13.Qf3 Bb4 (13...b5 14.Rfb1+=) 14.Be1 Qa5 15.Ne2 Be1 16.Rfe1 b5 17.Ng3 (17.e4 de4 18.Be4 Ne4 19.Qe4 Qc7+=) 17...Nb6 (17...b4 18.Reb1+=) 18.e4 Qb4 19.ed5? (better is 19.Ne2!?+=) 19...Qd4–+ 20.Kh1 Nbd5 21.f5 Ng4 22.h3 Nf2 23.Kh2 Ng4 24.Kh1 Nf2 25.Kh2 Nd3 26.cd3 gf5 27.Nf5 Qf4 28.Qf4 Nf4 29.d4 g6 30.Ne3 Ra4 31.Nc2 Rc4 32.Re4 Ng2 33.Kg2 Rc2 34.Kg1 Rh3 35.a4 Rhc3 36.a5 Rc1 37.Re1 Re1 38.Re1 Ra3 39.Rc1 Kd7 40.Kf1 0–1. Philippe – de Greiff, Amsterdam, 1954.

3.Bb2 ab4 4.a3 f6 5.ab4 Ra1 6.Ba1 e5 7.b5 e4 8.Nd4 f5 9.d3 Nf6 10.g3 Bd6 11.Bg2 0-0 12.0-0 c5 13.b6?? (better 13.bc6 Nc6 14.Nd2=) 13...cd4-+ 14.Bd4 Nc6 15.Ba1 Bc5 (15...Qb6?! 16.de4 d4 17.c3 fe4 18.cd4-+) 16.c4 Qb6 (better 16...dc4 17.dc4 Be6 18.Qc2-+) 17.cd5 Nd5 18.de4 Ndb4 19.Nc3 f4 20.gf4 Rf4 21.e3 Rf8 22.Nd5 Qd8 23.Qc1 b6 24.Qc4 Kh8 25.Rd1 Qh4 26.Nb4?? (26.Nf4-+) 26...Qf2 (26...Bb4?! 27.Qc6 Qf2 28.Kh1 Qe3 29.Bd4=) 27.Kh1 Bb4 (27...Bh3 28.Qf1 Qe3-+ (28...Nb4?! 29.Qf2 Rf2 30.Bh3=)) 28.Qc6= Be1?? (better 28...Qe3 29.Bd4 Qb3=) 29.Qc7+- Qf7 30.Qf7 Rf7 (30...Rg8 31.Qg7! Rg7 32.Rd8) 31.Rd8 (31.Rd8 Rf8 32.Rf8) 1-0. CaissaSoeze (2405) - Lavapies (2325), Rated Bullet tournament 1pcTlxOg, lichess.org, 2015. (=1.Nf3 A00: Irregular Openings 1...d5 2.b4)

3.b5 Bf5 4.Ba3 e5 (4...Nf6 5.e3=) 5.Bf8+= (5.Ne5? Ba3 6.Na3 Qe7–+) 5...Kf8 6.Ne5 Qd6 (6...Qe8 7.d4 f6 8.Nd3 Qb5 9.e3+=) 7.Nf3+/– Nd7 8.e3 Be4 9.Be2 h5 10.d4 Rh6 11.0-0 c6 12.c4 h4 13.Nc3 h3 14.g3 (worse is 14.Ne4 de4 15.g3 ef3 16.Bf3 Ne7+=) 14...Ne7 15.bc6 (15.bc6 bc6 16.Ne4 de4 17.Nd2+–) 1–0. Urlau,Thomas (2085) – Breitenstein,Erich (1845), desc–online.de, 2006. (=1.Nf3 d5 2.b4 a5)

3.b5 Nf6 4.a4 Bg4 5.Bb2 e6 6.Ne5 Bd6 7.Ng4 Ng4 8.e4 de4 9.Qg4 Nd7 10.Qg7 Rf8 11.Bc4 Qh4 12.g3 Qh3 13.Bf1 Qf5 14.Qh6 0-0-0 15.Bg2 Nf6 16.Qf6 Qc5 17.Nc3 Be5 18.Qh4 Bc3 19.Bc3 f5 20.0-0 Normal 1-0. ozo (2125) - darhaa (2135), Rated Blitz game, lichess.org, 2015. (=1.Nf3 d5 2.b4)

3.c3 c6 4.d4 ab4+= 5.cb4 Nf6 6.e3 g6 7.Be2 Bg7 8.0-0 0-0 9.h3 Ne4 10.Nfd2 f5 11.Ne4 fe4 (worse is 11...de4 12.Qb3 Kh8 13.Bb2=) 12.Bg4 (12.b5 e5+=) 12...Bg4–/+ 13.Qg4 Rf5 14.Nd2 Nd7 (14...Qb6 15.a3–/+) 15.f3 Nf6 (15...e5 16.fe4 Nf6 17.Qe2 Rf1 18.Nf1 Ne4 19.Bb2–/+) 16.Qg3 (16.Qh4 Rh5 17.Qe1 ef3 18.Nf3 Ne4+=) 16...Nh5 (16...ef3 17.Rf3 Rf3 18.Qf3–/+) 17.Qf2 (17.Qh2 e5 18.g4 ed4 19.Bb2 de3 20.Bg7 ed2 21.Bh6 Rf3 22.gh5–/+) 17...e5–/+ 18.g4 ed4 19.Rb1 (19.ed4 Nf4 20.Kh1 Rf8–+ (20...Nh3?! 21.Qg3 Rf7 22.Qh3–/+)) 19...de3 (19...Rf8!? 20.gh5 Qg5 21.Qg2 Qg2 22.Kg2 de3 23.Ne4 de4 24.Be3 Ra2 25.Kg1 ef3 26.Rf2–+) 20.Qe3–/+ Nf4 21.gf5 Bd4!! 22.Qd4 Ne2 23.Kh2 Nd4 24.fg6 Qd6 25.Kh1 e3 26.gh7 Kh7 27.Nb3 e2 28.Re1 Qg3 29.Bd2 Qh3 30.Kg1 Qf3 31.Kh2 Rg8 (31...Rg8 32.Bg5 Rg5 33.Nd4 Qh5#; 31...Qh5 32.Kg3 Rg8 33.Bg5 Qg5 34.Kf2 Qf4#) 0–1. FelixFri – McGhee, ChessWorld.net, 2008.

4.e3 e6 5.a3 c6 6.c4 dc4 7.Bc4 Qa5 (7...cb5 8.Bb5 Bd7 9.Be2=) 8.Nc3 Bd7 9.Rb1 Nf6 10.Ne5 Bd6 11.bc6 bc6 (11...Be5 12.cd7 Nbd7 13.Rb5=) 12.Nd7 (12.Ng4 Nd5 13.Ne4 Be7=) 12...Nbd7= 13.Qc2 Qg5 14.g3 Nc5 (14...Qa5 15.Bb2+=) 15.d4 Nb3 16.Bb3 ab3 17.Rb3 0-0 18.e4 Qg6 19.Qe2 (19.f3 e5 20.Ne2 Rfc8+=) 19...Be7 (19...e5!? 20.Qe3 Ng4=) 20.0-0 Rfb8 (20...Rfd8 21.Rd1+=) 21.Rb8+/– Rb8 ½–½. Engo Pardo,L – Carreres Boluda,D, Canals, 2000.

4.e3 e6 5.a3 Nf6 6.c4 c6 7.Nc3 (7.bc6 Nc6 8.Bb2 Be7=) 7...Qa5 8.Rb1 (8.Bb2 Bd6=) 8...Nbd7 (8...Bd6 9.Bb2=) 9.bc6 bc6 10.Nd4 (10.cd5 ed5 11.Qc2 Ba6+=) 10...c5 11.Ndb5 (11.Nf3 Ba6=) 11...Be7 12.Qf3 0-0 (12...Bb7 13.cd5 ed5 14.Be2=) 13.cd5 ed5 (13...Bb7!?=) 14.Nd5+= Nd5 15.Qd5 Nf6 (15...Rb8 16.Qe4 Re8 17.Bc4+=) 16.Qe5+/– Be6 (16...Qd8 17.Bb2+/–) 17.Nc7 Nd7 18.Qg3 Rab8 (18...Bh4 19.Qh4 Qc7 20.Bd3+/–) 19.Rb8 Rb8 20.Ne6 (20.Ne6 fe6 21.Bc4+/–) 1–0. Pal,Peter (2285) – Galvanek,Ladislav, SVK–ch Trencin, 1995. (=1.Nf3 d5 2.b4 a5 3.b5 a4)

4.e3 Nf6 5.c4 e6 6.a3 Nbd7 7.d4 dc4 8.Bc4 Nb6 9.Bd3 Be7 10.Nc3 Nfd5 11.Ne4 Bd7 12.Bb2 c6 13.bc6 Bc6 14.Ne5 Bd7 15.0-0 Ra5 16.Qe2 0-0 17.Nd7 Nd7 18.Rac1 f5 19.Nc3 N7f6 20.Nb5 Qd7 21.Rc2 Raa8 22.Rfc1 Rfc8 23.Rc8 Rc8 24.Rc8 Qc8 25.Qc2 Qc2 26.Bc2 Nb6 27.Bd3 Ne8 28.e4 g6 29.f3 Kf7 30.Kf2 Bf8 31.g4 f4 32.g5 h6 33.h4 hg5 34.hg5 Be7 35.d5 ed5 36.ed5 Bg5 37.d6 Bf6 38.d7 Nd7 39.Bc4 Ke7 40.Nc3 Nb6 41.Bb5 Nd6 42.Na4 Bb2 43.Nb6 Nb5 44.Nd5 Kf7 45.Nf4 Ba3 46.Nd3 Bd6 47.Ke3 Ke6 48.Ke4 Nc3 49.Kd4 Nd5 50.Nf2 b5 51.Ne4 b4 52.Ng5 Kf5 53.Ne4 Ke6 54.Ng5 Ke7 55.Kc4 Nf6 56.Kb3 Nd7 57.Kc4 Nc5 58.Nh3 b3 59.Kc3 Be5 60.Kd2 b2 61.Kc2 Nd3 62.Ng5 Nc5 63.Nh3 Kf6 64.f4 Bd4 65.Ng5 Kf5 66.Nf3 Bf6 67.Ne5 Be5 68.fe5 0–1. Koskinen – Kunnas, 1992.

4.a4 f6 5.e3 e5 6.Ne5 (better is 6.d4!? e4 7.Nfd2 cd4 8.ed4=) 6...fe5–/+ 7.Qh5 Kd7 8.Qe5 Nf6 9.Bd3 Bd6 10.Bf5 (better is 10.Qg5!? Qe7 11.0-0–/+) 10...Kc7–+ 11.b6 Kb6 12.Qb2 Kc7 13.Bc8 Kc8 14.Nc3 Re8 15.Rb1 Re7 16.Nb5 Nc6 17.0-0 Rb8 18.d3 b6 19.Bd2 Be5 20.c3 Bc7 21.h3 (21.Qc2 c4–+) 21...h5 22.f4 Rd7 23.Be1 c4 24.Qc2 (24.dc4!? Qe7 25.Nc7 Kc7 26.Qb5–+) 24...cd3 25.Qd3 Ne4 26.Nc7 Qc7 27.Bh4 Nc5 28.Qc2 Qd6 29.Rbd1 Qe6 30.Rf3 Qe4 31.Qe2 Qa4 32.Bg3 Qc4 33.Qc4 dc4 34.Rd7 Kd7 (worse is 34...Nd7 35.f5 Rb7 36.Bd6–+) 0–1. Dufek,V – Modr,Bretislav, Prague Bohemians, 1977.

4.Bb2 b6 5.c4 e6 =.

4.Bb2 b6 5.d3 f6 (5...Nf6 6.e3=) 6.e3 (6.e4 d4+=) 6...e5 7.Be2 Nd7 (7...Qd7 8.c4+=) 8.0-0 (8.c4 d4+=) 8...Bd6 9.Nfd2 White gets the initiative 9...Ne7 10.c4 Bb7 11.Bf3 Qc7 (11...Ra7 12.Nc3+=) 12.cd5 Nd5 (12...0-0 13.Nc3+=) 13.Be4+/– Ne7 (13...f5 14.Bf5 0-0 15.Qg4+/–) 14.Nc4 Nc8 (14...Ra7 15.Qg4 (15.Nd6?! Qd6 16.Qh5 g6+=) 15...Kf7 16.Nc3+/– (< 16.Nd6 Qd6 17.Rd1 Qe6 18.Qh5 g6+=)) 15.Qh5 (15.Nd6?! Nd6 16.Qh5 g6 17.Bg6 Ke7=) 15...Ke7 (15...Kd8 16.Nc3+/– (16.Bh7? Nf8–+)) 16.Nc3+– (16.Bh7? Nf8 17.Ne5 Be5 (17...fe5?! 18.Qg5 Ke8 19.Be4–/+) 18.Be5 Qe5 19.Qe5 fe5–+; 16.Nd6?! Nd6 17.Nc3 g6+/–) 16...Nf8 (better is 16...Ra7!?+–) 17.f4 (17.Nd6?! Nd6 18.Nd5 Bd5 19.Bd5 Rc8+/–) 17...Ra7 (17...ef4 18.Bb7 Qb7 19.Nd5 Kd8 20.Ndb6 Nb6 21.Nd6 Qd5 22.Qd5 Nd5 23.Nf7 Ke7 24.Nh8 Ne6+–) 18.Bb7 (18...Qb7 19.fe5+–) 1–0. Subedei – giving up claim a win, ChessWorld.net, 2005.

4.Bb2 b6 5.h3 Bb7 (5...Nf6 6.g3=) 6.g4 (6.e3 Nf6=) 6...f6 7.c4 d4 8.Bg2 Nd7 (8...e5 9.d3=) 9.d3 e6 (9...Ne5 10.Nbd2=) 10.Nbd2 (10.e3 e5=) 10...Ne7 (10...Bd6 11.Ne4 Be4 12.de4=) 11.Rg1 (11.0-0 Qc7=) 11...Ng6 (11...Qc7 12.Bc1=) 12.Nd4 Bg2 (12...cd4 13.Bb7) 13.Ne6 Qe7 14.Nc7 (worse is 14.Nf8 Nf4 15.Rg2 Ng2 16.Kf1 Nf4 17.Nd7 Qd7–/+) 14...Kf7?? (better is 14...Kd8 15.Na8 Ba8=) 15.Rg2+– Rd8 (15...Nf4 16.Rg3 (16.Na8?! Ng2 17.Kf1 Nh4+/–) 16...Rd8 17.Na6+–) 16.Nd5 (16.Nd5 Qd6 17.Ne4+–) 1–0. amoruritme – giving up claim a win, ChessWorld.net, 2005.

4.Bb2 Nf6 5.e3 =.

4.bc6 Nc6 5.Bb2 Nf6 6.e3 Bg4 7.d4 Rc8 8.Nbd2 e6 9.a3 Bd6 10.c4 0-0 11.cd5 ed5 12.Bd3 Re8 13.Qb3 Ne4 14.Rb1 Nd2 15.Nd2 Qh4 16.g3 Re3 17.fe3 Bg3 18.hg3 Qh1 19.Nf1 Re8 20.Qb7 Re3 21.Kd2 Rd3 22.Kd3 Qe4 23.Kd2 Qe2 24.Kc3 Qf3 25.Kd2 Qe2 26.Kc3 Qf3 27.Kd2 Qf2 28.Kc3 Qd4 29.Kc2 Bf5 30.Kc1 Qc4 31.Kd2 Qd3 32.Ke1 Qb1 33.Kf2 Qc2 34.Kg1 Qc5 35.Kg2 h6 0–1. Hunnex – Steckel, Los Angeles 1951.

4.d4 cd4 5.Qd4 Nf6 =.

4.d4 e6 =.

4.e3 Nf6 5.Bb2 Nbd7 6.a4 Qc7 7.c4 e6 8.cd5 ed5 9.Nc3 Be7 10.Bd3 0-0 11.Bb1 d4 (11...Nb6!?=) 12.ed4+= cd4 13.Ne2 Bc5 14.Bd4 Bd4 15.Nfd4 Re8 16.Ba2 Nc5 17.0-0 Bg4 18.f3 Bd7 19.Rc1 Qb6 20.Kh1 Nd3? (20...Qd6+=) 21.Qb3?? (better is 21.Bf7 Kf7 22.Qb3 Be6 23.Qd3+–) 21...Nc1= 22.Qf7 Kh8 23.Rc1 Rac8 24.Rc8 Rc8 25.Be6?? (better is 25.Kg1=) 25...Qd4–+ 26.Qf8 (26.Bb3 Qd2 27.Ng1–+) 26...Rf8 27.Nd4 Be6 0–1. Jaskulski,Klaus (1865) – Bornschein,Burkhard (2065), Berlin Unicorn op, 2008. (=1.Nf3 d5 2.b4 a5 3.b5 c5)

4.e3 Nf6 5.d4 =.

4.g3 f6 5.c4 d4 (5...dc4 6.Qa4=) 6.d3 e5 7.Nbd2 (7.Bg2 Nd7+=) 7...b6 (7...Bd6!?=) 8.Bg2+= Bb7 9.0-0 Bd6 10.Ne4 Ne7 (better 10...f5!? 11.Nd6 Qd6+=) 11.Nd4!+- ed4 (11...cd4 12.Nd6 Theme: Double Attack) 12.Nd6 Annihilates a defender: d6 12...Qd6 13.Bb7 Ra7 14.Bf4 (14.Bf4 Qd7 15.Bg2+- (15.Bb8?! Rb7 16.Bf4 Ng6+/-)) 1-0. marekt (2200) - raptorian (1925), gameknot.com, 2019. (=1.Nf3 d5 2.b4 a5 3.b5 c5)

5.Bb2 Bb7 6.Be2 f6 (6...Nf6 7.Bf6 ef6 8.d4=) 7.d4 c4 8.0-0 f5 9.Ne5 Nf6 10.Nc3 e6 11.f3 (11.Bh5 g6 12.Bf3 Qc7+=) 11...a4 12.Rb1 Nbd7 13.Bc1 Bd6 14.f4 a3 15.Bh5 g6 16.Bf3 Qc7 17.Qe1 Ne4 (17...Ne5? 18.fe5 Be5 19.de5+-) 18.Be4 de4 (18...Be5? 19.Bd5 (19.de5?! de4 20.Qe2 Qc5+=) 19...Bd5 20.fe5+-) 19.Qh4 (19.Bd2 Rg8=) 19...Ne5 20.fe5 Be7 21.Qh6 0-0-0 22.Bd2 Rdg8 (22...Kb8 23.Be1=) 23.Be1 Qd8 24.Qh3 g5 25.Qh5 h6 (25...g4 26.Ne2=) 26.Ne2 (26.Qf7 Qd7+=) 26...Qf8 27.Ng3 Kc7 28.Qe2 Bd5 29.Qd2 h5 30.Ne2 h4 31.Nc3 Qd8 (31...Rg7 32.Nd5 ed5 33.Qf2=+) 32.Na4 (32.Nd5 Qd5 33.Qe2 Kb8=) 32...Qa8 33.Nc3 Rd8 34.Qe2 Kd7 (34...Kb8 35.Nd5 Qd5 36.Bb4=) 35.Nd5+= Qd5 36.Bb4 Ra8 37.Be7 Ke7 38.Qd2 Ra4 39.Rb4 Ra5 40.Rfb1 Kf7 (40...h3 41.Qc3 Rc8 42.g3=) 41.Qc3 (41.Qe2!?+/-) 41...Rc8= 42.Qe1 Kg6 43.Qf2 Ra7 44.Qe2 Rf7 (44...c3 45.R4b3+=) 45.Rf1 (45.Ra4 f4+/-) 45...Rg8 (45...h3 46.gh3 Rh7 47.Rf2=) 46.Rbb1 (46.Qc4!? Qc4 47.Rc4+-) 46...Rgg7 47.Qd2 Kh7 48.Qb4 f4 49.Qa3 f3 50.Qc3 g4 51.Rbe1?? (better 51.g3+=) 51...g3-+ (51...Qb5?! 52.Rd1-/+) 52.Kh1?? (52.Ra1 gh2 53.Kh2 Rg2 54.Kh1-+) 52...f2 (52...Qb5?! 53.h3-+) 53.Re2 h3 54.Qd2 (54.hg3 hg2 55.Kg2 Rg3 56.Kg3-+) 54...hg2 (54...Qb5?! 55.hg3 hg2 56.Kg2=) 55.Kg2 gh2 56.Kh2 Rf5 57.Ref2 Rh5 0-1. norba94 (2405) - zsolti_83 (2470), Rated Blitz game, lichess.org, 2016. (=1.Nf3 d5 2.b4)

5.c4 e6 6.Bb2 Nf6 7.d4 Bb7 8.Nbd2 Nbd7 9.Be2 Be7 10.0-0 0-0 11.h3 Rc8 12.Rc1 Ne4 13.Bd3 f5 14.Ne5 (14.Qe2 Bf6=) 14...Ndf6 (14...Ne5!? 15.de5 Nd2 16.Qd2 dc4 17.Rc4 Qe8=+) 15.cd5 ed5 16.Be4 (16.dc5 bc5 17.a4 Bd6=) 16...fe4=+ (worse 16...Ne4 17.Ne4 de4 18.dc5 Rc5 19.Rc5 bc5 20.Qc2+=) 17.a4 (17.dc5 bc5 18.a4 c4=+) 17...Bd6 (17...c4 18.f3-/+) 18.f3 (18.dc5 bc5 19.Ng4 Ne8=) 18...ef3-/+ 19.Ndf3 Ne4 20.Ba3 (20.dc5 bc5 21.Qc2 Ng3-/+) 20...Rc7 21.dc5 bc5 22.Qe1 Qe8 23.Nd3 Ng3 (23...Qg6 24.Nf4 Bf4 25.ef4 Rf4 26.Qa5=) 24.Rf2 Re7 (24...Qe7 25.Rfc2 Ne4 26.Qa5 Rf3 27.gf3 Qg5 28.Kh1 Qe3 29.fe4-+) 25.Bc5 (worse 25.Nc5 Re3 26.Qa5 Re2-+) 25...Bc5 26.Nc5 Re3 27.Qd2 (better 27.Qd1 Ne2 28.Re2 Re2 29.Nb7 Rf3 30.Qd5 Rf7 31.Kh2=) 27...Bc8?? (better 27...Ne2 28.Kh2 Nc1 29.Qc1 Re4-/+) 28.Kh2 (better 28.Qd5 Kh8 29.Kh2+/-) 28...Ne4?? (better 28...Rf5 29.Rc2 Rff3 30.Rf3 Rf3 31.Qd5 Rf7 32.Kg3 Bf5+-) 29.Qd5 (better 29.Qe3 Nf2 30.Qf2 Qd8+-) 29...Kh8 (29...Be6 30.Ne6 Nf6 31.Ng7 Nd5 32.Ne8 Rfe8+-) 30.Ne4 Re4 31.Rc8! Qc8 32.Qe4 Qc7 (32...Kg8+-) 33.Qe5 (33.Ne5 Re8+-) 33...Qb6?? (better 33...Qe5 34.Ne5 Rf2=) 34.Rf1 (34.Rc2 Qg6 35.Rc7 Re8+-) 34...h6 (34...Qd8 35.Rc1 Re8 36.Ng5+-) 35.Qe7 (35.Ng5 Rg8 36.Nf7 Kh7 37.Qe4 Qg6 38.Qg6 Kg6 39.Ne5 Kh7+-) 35...Rg8 (35...Qb8 36.Kh1+-) 36.Qe2 (36.Rc1 Qg6+-) 36...Qd6 37.g3 Qb4 (37...Rf8 38.Nh4 Rd8 39.Rf2+-) 38.Nh4 (better 38.Ne5 Rc8 39.Nf7 Kg8 40.Nh6 Kh7 41.Nf5+-) 38...Qa4 (38...Rd8 39.Rd1 Rd1 40.Qd1 Kh7+-) 39.Ng6 Kh7 40.Qd3 Re8 (40...Qa2 41.Kg1 Qc2 42.Qc2 Re8 43.Nf8 Kg8 44.Qh7) 41.Nf8 Kg8 42.Qh7 1-0. Covitsalas (2200) - jhonores (2215), Rated Blitz game, lichess.org, 2020. (=1.Nf3 d5 2.b4)

5.c4 e6 6.d4=.

5.c4 Nf6 6.cd5+= Nd5 7.d4 (7.Bc4 Bg4+=) 7...e6 (7...cd4 8.Qd4 Nb4 9.Qd8 Kd8 10.Kd1=) 8.Bb2+= Bb7 (8...cd4 9.Qd4 Nd7 10.Bc4=) 9.dc5 bc5 10.Nbd2 (10.e4 Nf6 11.Qd8 Kd8 12.Bf6 gf6+=) 10...Nd7 (10...Nb4 11.a4+=) 11.a3 (11.e4 Nf4+=) 11...N7f6 (11...N7b6 12.Qc2+=) 12.Nc4 Be7 (12...Nd7 13.Qc2+/–) 13.Qc2 0-0 14.Bd3 (14.Rd1 Nd7+/–) 14...h6 (14...Kh8 15.Rd1+/–) 15.0-0+/– Nb6 16.Rfd1 Nc4 17.Bh7! Nh7 18.Rd8 Rfd8 19.Qc4 Bd5 (19...Bf3 20.gf3 Nf8 21.Rb1+/–) 20.Qe2 a4 (20...Nf6 21.Nd2+/–) 21.Ne5 (21.Ne5 Ng5 22.Rc1+/–; 21.e4 Bb7+–) 1–0. Tihomir Glowatzky – giving up claim a win, ChessWorld.net, 2005.

5.d4 e6=.

4.e3 Bd7 5.a4 Nf6 6.Bb2 (6.h3 c5+=) 6...e6 7.Be2 Qb6 (7...Bd6 8.Qc1=) 8.Bd4 Bc5 9.Bc5 Qc5 10.d4 Qb4 11.c3 White threatens to win material: c3xb4 11...Qb2 Black threatens to win material: Qb2xa1 12.Ra3 cb5 13.Rb3 White threatens to win material: Rb3xb2 13...Qa1 Black threatens to win material: Qa1xa4 14.Ra3 White threatens to win material: Ra3xa1 14...Qb2 15.Rb3 Qa1 16.Ra3 Twofold repetition 16...Qb2 17.Rb3 ½–½. Godes,Dmitry R (2310) – Kaganskiy,Gleb (2340), Maccabia IM Tel Aviv, 2001. (=1.Nf3 d5 2.b4 a5 3.b5 c6)

4.e3 Nf6 5.a4 Bg4 6.Bb2 e6 7.h3 Bh5 8.c4 (8.g4 Bg6=) 8...Nbd7 9.cd5 cd5 10.g4 Bg6 11.Bg2 (11.Nc3 Bd6=+) 11...Bd3 12.Nc3 (12.Bf1 Bf1 13.Rf1 Rc8=+) 12...Bb4 (12...Rc8 13.Rc1-/+) 13.Ne2 0-0 14.Nf4 (14.Nc1 Bc4=+) 14...Nc5 (14...Bc4 15.Bf1-/+) 15.Bf6 (15.Ne5 Bc4 16.Nc4 dc4-/+) 15...Qf6-/+ (worse 15...gf6 16.Nd3 Nd3 17.Ke2=) 16.Nd3 Nd3 17.Ke2 Nb2 18.Qb3 Nc4 19.d3 Nb6 20.g5 Qe7 21.h4 Rac8 22.Rac1 Ba3 23.Ra1 Bb4 24.Rhc1 (24.Rac1 Rc7-/+) 24...Rc7 (24...e5 25.Bh3 Rc1 26.Rc1-/+) 25.Nd4 (25.Rc7!? Qc7 26.Ra2-/+) 25...Rfc8-/+ 26.Rc7 Rc7 27.Nc2 Bd6 28.Ra2 Be5 29.f4 Bd6 30.Nd4 Qd7 31.Rc2 Rc2 32.Qc2 Qc7 (32...Qd8=+) 33.Qb3 (better 33.Qc7 Bc7 34.f5 ef5 35.Nf5+=) 33...Qc1-/+ 34.Nc2 (34.Qd1 Qa3 35.Qb3 Qa4 36.Qa4 Na4-/+) 34...Qg1-+ 35.Kf3 Qh2 (35...Qd1 36.Kg3-/+) 36.Qc3-/+ Qh4 37.Qa5 Qh5 38.Kf2 Qd1 (38...Bc5 39.d4 Nc4 40.Qc3 Qh4 41.Ke2-/+) 39.Nd4 (better 39.Qb6!? Qc2 40.Kg3=) 39...Bc5-/+ (39...Na4 40.Bf3 Qa1 41.Qd8 Bf8 42.f5 Qb2 43.Kg3 ef5 44.Bd5+=) 40.Qc3 Na4 41.Qc2 Qc2 42.Nc2 Nc3 43.Bf1 (43.d4!? Be7 44.Bf1-/+) 43...Nb5-+ 44.d4 Na3 45.dc5 Nc2 46.Ba6 (46.e4 Nd4 47.ed5 ed5-+) 46...Nb4 (46...ba6?? 47.c6 h5 48.c7+-) 47.Bb7 (47.Bf1 h5-+) 47...Nd3 48.Kf3 Nc5 49.Bc6 Kf8 50.f5 (50.Kg4 Ne4-+) 50...Ke7 51.fe6 fe6 0-1. Uddin,S (1890) - Rahman,Tai (2185), 9th BAN Games Rapid, 2021. (=1.Nf3 d5 2.b4)

3.a3 b5 4.e3 h6 5.a4 ba4 6.c4 dc4 7.Ne5 Be6 8.Qa4 Bd7 9.b5 Bb5?? (better is 9...e6 10.Nd7 Qd7 11.Bc4 a5+/–) 10.Bc4+– c6 (10...Qd2 11.Nd2 Ba4 12.Bf7 Kd8 13.Ra4 Nf6+–) 11.Bf7 1–0. aspasio – valerypavlovich, net–chess.com, 2013.

3.a3 Nc6 4.Bb2 (--> 1.b4 d5 2.Bb2 a6 3.Nf3 Nc6 4.a3).

3.a3 Bg4 4.Bb2 Nf6 5.Ne5 Nbd7 6.Ng4 Ng4 7.e4 Nge5 8.ed5 g6 9.d4 Bg7 10.de5 Ne5 11.Nc3 0-0 12.Be2 Qd6 13.Ne4 Qb6 14.Bc1 c6 15.Be3 Qc7 16.d6 ed6 17.Qd6 Qd6 18.Nd6 Rfd8 19.0-0-0 Rd7 20.f4 Rad8 21.fe5 Be5 22.Nb7 Rd1 23.Rd1 Re8 24.Rd8 Kf8 25.Bc5 Kg7 26.Re8 Bh2 27.Bd4 Kh6 28.Nd8 f5 29.Nf7 1–0. wesolyPolak (1765) – maplotte, GameColony.com, 2002.

3.d4 Qd6 4.a3 b5 (4...Nf6 5.e3=) 5.e3 a5 (5...Nd7 6.a4 ba4 7.Bd2+=) 6.Bb5+= Kd8 (better is 6...c6!? 7.Bd3 ab4+=) 7.ba5+– Ra5 8.Bd3 1–0. kolya (2005) – NN, GameColony.com, 2002.

3.d4 e5 4.Ne5 Bb4 5.c3 =.

3.d4 Nf6 4.Nc3 e6 5.a3 Bd6 6.g3 Nc6 7.Bg2 e5 8.de5 Be5 9.Ne5+/– Ne5 10.0-0 Be6 11.f4 Nc4 (11...Neg4 12.f5 Bc8 13.h3+–) 12.f5+– Bc8 13.Bd5 Nd5 14.Qd5 (worse is 14.Nd5 c6 15.Nc3 0-0+/–) 14...Qd5 15.Nd5 0-0 16.Rd1 c6 17.Ne7 Kh8 18.Bf4 Re8 19.Rd4 Nb2 (19...b5 20.a4+–) 20.e4 (20.Kf2 Be6 21.Bd6 Nc4+–) 20...Na4 (20...f6 21.g4+–) 21.Rad1 b5 22.Rd8 Bb7 23.R8d7 Bc8 24.Rc7 Nc3 25.Rd6 Ne4 26.Rdc6 Bf5 27.Nf5 Nf6 28.Rf7 Re1 29.Kf2 Rae8 30.Kf3 Rf1 31.Kg2 Rfe1 32.Ng7 R8e2 33.Kh3 Rh1 34.Rcf6 Rhh2 35.Kg4 Rc2 36.Ne8 Rc4 37.Rf8# 1–0. Anonymous – qwnv, internet, 2011.

3.e3 c6 4.c4 Bf5 5.d4 e6 6.c5 Nd7 7.Bb2 Ngf6 8.Bd3 Bd3 9.Qd3 Ne4 10.0-0 Be7 11.a4 Qc7 12.Ne5 f6 13.Nd7 Kd7 14.f3 Ng5 15.Nc3 e5 16.de5 fe5 17.f4 e4 18.Qd1 Ne6 19.Nd5 cd5 20.Qd5 Kc8 21.Qe6 Qd7 22.Qe4 1–0. BlackDemon (2615) – fightforhemp (1660), FICS rated standard game, 2013.

3.e3 e6 4.Ne5 Nd7 5.Nd7 Bd7 6.c4 c6 7.cd5 cd5 8.Nc3 b5 9.Be2 g6 10.0-0 Bg7 11.Rb1 Nf6 12.d3 0-0 13.Bf3 Bc6 14.e4 h6 15.ed5 Bd5 16.Bd5 Nd5=+ 17.Ne4 Qe7 18.g4? g5 19.f4 Bd4 20.Kg2 gf4 21.Ba3?? Ne3–+ (22.Kh1 Nd1 23.Rbd1 a5–+) 0–1. runner – beammeupscotty (2115), net–chess.com, 2006.

3.e3 Nf6 =.

3.e3 Bg4 4.h3 Bh5 5.c4 dc4 6.Bc4 e6 7.a3 Bd6 8.g4 Bg6 9.Bb2 c6?? (better is 9...Nf6=) 10.Bg7+– b5 11.Bb3 (11.Bh8?! bc4 12.Nc3 Nd7+–) 11...Qe7 (11...a5 12.ba5 Nd7 13.Bh8+–) 12.Bh8 f6 13.Nd4 Be4 14.0-0 Bd5 15.Nc3 Kd7 (15...Be5 16.Nde2+–) 16.Nd5 cd5 17.e4! Nc6 (17...de4 18.Be6 Double attack) 18.Nc6 Kc6 19.ed5 ed5 20.Bd5! Kd5 21.Re1 Qf8 22.Qf3 Kc4 23.Rac1 Kd4 24.Qe4# 1–0. gtate (2475) – grahamtrue (2120), net–chess.com, 2007.

3.Bb2 (--> 1.b4 d5 2.Bb2 a6 3.Nf3).

3.Bb2 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 a6).

3.Bb2 Bb7 4.Nc3 d4 (better is 4...a5!? 5.Nb5 Nc6+/–) 5.Nb5+– Bf3 (5...Nc6 6.Nbd4 (6.Bd4?! a6=) 6...Nd4 7.Nd4+–) 6.ef3 c6 (6...Nc6 7.c3 Nf6+–) 7.Nd4 e5 (7...e6 8.Bd3+–) 8.Qe2 Bb4 (8...Qf6 9.f4! Qf4 10.g3+–) 9.Qe5 Kf8 (9...Qe7 10.Ne6! fe6 11.Qg7 Nd7 12.Qe7 Ke7 13.Bh8 Ngf6 14.Bf6 Kf6+–) 10.Ne6! fe6 11.Qg7 Ke8 12.Bd3 Bf8 (12...Ne7 13.Qh8 Kd7 14.Qh7+–) 13.Qh8 Nd7 (13...Ne7 14.0-0 Qd6 15.Qh7+–) 14.Qg8 Qa5 15.0-0 Qd2 16.Qe6 Kd8 17.Rad1 Qg5 18.Bf5 Bd6 (18...Qg2 19.Kg2 Kc7 20.Rd7 Kb6 21.Qb3 Ka5 22.Bc3 Bb4 23.Qb4 Ka6 24.Qb7#) 19.Qd7# 1–0. Anonymous – Anonymous, sv.lichess.org, 2012.

3.Bb2 f6 4.e3 Bb7 (better is 4...e5!?=) 5.Bb5+/– c6 6.Be2 e5 7.0-0 (7.a3!?+/–) 7...Bb4+= 8.c4 e4 9.Nd4 Qd7 10.Bg4 Qd6 11.cd5 cd5 (11...Qd5 12.Be6 Qd6 13.a3+–) 12.a3 Bc5 13.Ne6 Kf7 14.Nc5 Qc5 15.Bh5 g6 16.Be2 Ne7 17.d4 Qd6 18.Nc3 Bc6 19.f3 Nf5 20.Qd2 Bd7? (better is 20...ef3 21.Rf3 Kg7+/–) 21.fe4+– Nh4 (21...de4 22.Ne4 Qe7 23.Nf6 Qf6+–) 22.e5 Qe6 (22...Qc7 23.Nd5 Qb7+–) 23.Rf6 Kg7 (23...Qf6 24.ef6 Be6 25.e4+–) 24.Re6 Be6 25.Rf1 (25.e4 Rf8 26.Rf1 Rf1 27.Kf1 h6+–) 25...Nd7 (25...Nc6 26.e4 de4 27.d5+–) 26.e4 a5 (26...de4 27.d5 e3 28.Qe3+–) 27.Qg5 Rab8 28.Qe7 Kh6 (28...Kg8 29.Qe6 Kg7 30.Qe7 Kh6 31.Bc1 g5 32.Qg5) 29.Bc1 (29.Bc1 g5 30.Qg5) 1–0. Carloschess – Ronan48, playchess.de, 2003. (=1.Nf3 d5 2.b4 b5)

3.Bb2 Nf6 4.e3 c6 5.a4+/– Bd7 6.ab5 cb5 7.Na3 a6 8.Nb5!+– Bb5? 9.Bb5 Nfd7 10.Ne5 ab5 11.Ra8 Ne5 12.Be5 f6 13.Rb8 fe5 14.Qh5 g6 15.Rd8 Kd8 16.Qe5 Rg8 17.Qd5 Ke8 18.Qg8 (18.Qg8 e5 19.Ke2 Kd8 20.Qf8 Kd7 21.Qf7 Kd6 22.Ra1 e4 23.Ra6 Ke5 24.Qe6#) 1–0. pozarski (1975) – GloriousOne (1715), GameColony.com, 2002.

3.d4 Nc6 4.Nc3 (4.a4 ba4 5.b5 Nb8+=) 4...Nb4 (4...e5 5.a3 e4+=) 5.Bf4 (better is 5.a3 Nc6 6.e4+=) 5...Bf5+= 6.e4 de4 7.Nh4 (better is 7.a3 e5 A) worse is 8.ab4 Bb4 (8...ef4?! 9.Bb5 Bd7 10.Bd7 Qd7 11.Ne5+=) 9.Bb5 Kf8+=; B) worse is 8.Bb5 c6 9.ab4 cb5 10.Ne5 Bb4–/+; C) 8.Ne5 Qd4 9.Bb5 (worse is 9.Qd4 Nc2 10.Kd1 Nd4 11.Nb5 Ne6–+) 9...c6 10.ab4 Qd1 11.Kd1 cb5 12.Nb5 Rd8 13.Kc1 Bb4 14.Nc6+– (14.Ra7?! Ne7+=)) 7...g6 (better is 7...Bc8 8.Nb5 Nd5–/+) 8.Nf5+= gf5 9.Nb5 (worse is 9.Bb5 c6 10.Bc4 Bg7=) 9...Nd5 10.Bd2 (10.Be5 f6 11.c4 c6 12.cd5 Qa5 13.Qd2 Qd2 14.Kd2 Bh6 15.Kd1 cb5 16.Bb5 Kd8=) 10...Ngf6 (10...c6 11.Nc3+=) 11.Bc4?? (better is 11.c4!? a6 12.cd5 ab5 13.Bb5 Nd7 14.Qh5+–) 11...Bg7 (11...Nb6 12.Bf4 Nc4 13.Nc7 Kd7 14.Qe2–/+) 12.0-0 0-0 13.Rb1 (13.Na3!?+=) 13...Nb6–/+ 14.Bb3 a6 15.Nc3 Qd4 16.Ne2 Qd8 17.Qe1 a5 (better is 17...Qd7–/+) 18.Rd1?? (18.Ba5 Qd7+=) 18...Qc8?? (18...a4 19.Bb4 Qe8 20.Ng3 ab3 21.ab3–+) 19.Nd4?? (better is 19.Ba5 e6 20.Ng3+=) 19...a4–+ 20.Nc6 ab3 (better is 20...Qe8 21.Bf7 Qf7–+) 21.Ne7+– Kh8 22.Nc8 bc2 23.Nb6 (better is 23.Rc1 Rfc8 24.Rc2+–) 23...cd1Q 24.Qd1 cb6 25.Bb4 (25.Qb3!?+=) 25...Rfd8= (25...Ra2? 26.Bf8 Bf8 27.Qb3+–) 26.Qb3 Nd5 27.a3 Nb4 28.ab4 Rf8 (28...Kg8 29.Qc4=) 29.h4 (29.Qd5!?+/–) 29...Rad8 30.Rc1 Bh6 (30...Rd3 31.Qa2=) 31.Rc7 Rd3 32.Qc4 (32.Qa4!?+=) 32...Rd1= 33.Kh2 Bf4 34.g3 Bg3?? (better is 34...Bc7 35.Qc7 Kg7=) 35.fg3 (better is 35.Kg3!? Rd3 36.Kh2 Kg8+–) 35...Rfd8 36.g4 (36.Rc8!? Kg7 37.Rd8 Rd8 38.Qc3 Kg8+–) 36...R8d3 37.gf5?? (37.Rc8 Kg7 38.gf5 R1d2 39.Kg1 Rd1 40.Kf2 R1d2 41.Ke1 Rd1 42.Ke2 R1d2 43.Kf1 Rd1 44.Kg2 R1d2 45.Kh1 Rd1 46.Kg2 R1d2 47.Kf1 Rd1 48.Ke2 R1d2 49.Ke1 Rd1 50.Ke2=) 37...R1d2= 38.Kg1 Rd1 39.Kf2 R1d2 40.Ke1 Rd1 41.Ke2 R3d2?? (better is 41...R1d2 42.Kf1 Rd1 43.Kg2 R1d2 44.Kh1 Rd1 45.Kg2 R1d2 46.Kf1 Rd1 47.Ke2 R1d2 48.Ke1 Rd1 49.Ke2=) 42.Ke3+– b5 (42...Rd3 43.Kf4 Rf1 44.Ke4 Rfd1 45.Qf7 Re1 46.Kd3 Rd1 47.Ke2 Re1 48.Ke1 h6 49.Qe8) 43.Qf7 Rd3 44.Kf4 Rf1 (44...Rf3 45.Ke5 Rd5 46.Qd5 Rf5 47.Kf5 e3 48.Qd8) 45.Kg5 (45.Ke5 Rd5 46.Qd5 Rf5 47.Kf5 e3 48.Qd8) 45...Rg1 46.Kh5 Rg5 47.Kg5 Rg3 48.Kh5 Rg5 49.Kg5 (49.hg5 e3 50.Qh7) 49...h6 50.Kh6 1–0. vaingrecsky (2270) – fishmooney (2140), net–chess.com, 2016.

3.d4 e6 4.c3 (4.Bd2 Nf6=) 4...f6 (4...a5 5.e3=) 5.a4+= a5 (better is 5...ba4!? 6.Ra4 Bd7+=) 6.ab5+/– Bb7 (better is 6...c6!?+/–) 7.ba5+– c6 8.e3 (8.b6!? Nd7 9.Ra4 Bd6+–) 8...cb5 (8...Ra5!? 9.Ra5 Qa5+/–) 9.Bb5+– Nc6 (9...Bc6 10.Bc6 Nc6 11.a6+–) 10.Qa4 (10.a6 Qb6 11.ab7 Ra1 12.Bc6 Kf7+–) 10...Qd7 11.0-0 Ra5 12.Qa5 Na5 13.Bd7 Kd7 14.Ra5 Bd6 15.Ra7 Kc6 16.Ba3 Bb8 17.Ra5 Bd6 18.Bd6 Kd6 19.Rb5 Bc6 20.Rb6 e5 21.de5 Kc5 22.Rb4 fe5 23.Ne5 Bb5 24.Rd1 Nf6 25.f3 Re8 26.Nd3 Bd3 27.Rd3 Nd7 28.e4 de4 29.fe4 Ne5 30.Rd5 Kc6 31.c4 Ra8 32.h3 Ra1 33.Re5 h6 34.Rbb5 Kd6 35.Kh2 Ra4 36.Red5 Ke6 37.Rb6 Kf7 38.Rd7 Kg8 39.Nd2 h5 40.Rbb7 Kh7 41.Rg7 Kh6 42.Nf3 Rc4 43.Nh4 Rc6 44.Nf5# 1–0. alanwsp (1755) – envirrhyment (1650), net–chess.com, 2004.

3.d4 Nf6 4.e3 c6 5.a4 a6 (5...e6 6.Bd2+=) 6.ab5+– cb5 (6...Qb6 7.Nc3+–) 7.Bb5! Bd7 (7...ab5 8.Ra8 Pinning (8.Ra8 Deflection)) 8.Bd7 (8.Bd3 e6 9.b5 Qb6+–) 8...Nbd7 9.Qe2 (9.0-0 e6+–) 9...e6+= 10.Ra6 (10.Bd2 Qb6+=) 10...Bb4 11.Bd2 Rb8 (11...Bd6 12.Nc3 Ne4 13.Ne4 de4 14.Ra8 Qa8 15.Ng5+=) 12.0-0+– 0-0 13.Bb4 Rb4 14.Nbd2 Re8 (14...Qc8 15.Qd3+–) 15.Rfa1 h6 (15...Qc7 16.Qd3+–) 16.c4 dc4 17.Nc4 Ne4 (17...Qc7 18.Ncd2+–) 18.Nfd2 (18.Ra7 Re7+–) 18...Nc3 (18...Nd2 19.Nd2 e5 20.de5 Ne5 21.Nf3+–) 19.Qd3+– Rc4? (better 19...Nb5 20.Ne4 Qc7+–) 20.Nc4 Nb8 (20...Nd5 21.Qe4 N7f6+–) 21.Ra8 (21.Rd6 Qc7 22.Qc3 Rc8+–) 21…Qh4 ½–½. Low,Winston – Kos,Sabine, IECC, 2003.

3.e3= c6 4.Nc3 (4.a4 ba4 5.Ra4 e6+=) 4...g6 (4...a5 5.ba5 Nf6 6.Bb2=) 5.d4 Bh6 (5...e6 6.a3=) 6.Ne2 (6.a4 ba4 7.Ra4 Nf6+=) 6...Bg4 (6...a5 7.ba5 Qa5 8.Bd2=) 7.Ng3 (7.Ne5 Be2 8.Be2 a5+=) 7...e6 8.Be2 f6 (8...a5 9.ba5 Qa5 10.Bd2=) 9.Qd3 (9.a4 Bf8 10.c3 ba4+=) 9...Qc7 (9...Bf3 10.Bf3 a5 11.c3+=) 10.a4+/– a6 11.h3 Bf5 (11...Bf3 12.Bf3 Bf8 13.c3+=) 12.e4 (better is 12.Nf5!? gf5 13.ab5 cb5 14.Qa3+/–) 12...Bc1 13.Rc1 (worse is 13.Nf5 A) worse is 13...gf5 A1) 14.Rc1? fe4 (worse is 14...de4 15.Qe3–+) 15.Qe3 ef3 16.Qe6 Qe7 17.Qe7 Ne7 18.Bf3 a5–+; A2) 14.ed5 Bf4 15.de6=; B) 13...ef5 14.ef5 Bf4 15.fg6 hg6 16.ab5 cb5 17.Qg6 Kf8+=) 13...ba4?? (better is 13...de4 14.Ne4 Nd7+=) 14.ef5+– (14.Nf5?! ef5 15.ef5 a5+/–) 14...gf5 15.Qe3 Kf7 16.Ng5 Kg6?? (16...fg5 17.Qg5 Combination) 17.Bh5 Kg7 (17...Kh6 18.Ne6 f4 19.Nf5 Kh5 20.Qf3 Kg6 21.Qg4 Kf7 22.Nc7 c5 23.Qg7) 18.Ne6 1–0. Papa Lazarou – Pekin Dragons, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 b5)

3.e3 Bg4 4.Be2 (4.Bb5!? c6 5.Be2+/–) 4...Bf3 5.Bf3 Nc6 (5...a5 6.ba5 Ra5 7.Bb2=) 6.c3 Nf6 7.d4 e5 8.0-0 Ne4 (8...e4 9.Be2 a6 10.a4+=) 9.Be4 (9.a4 a6+/–) 9...de4+= 10.f3 ed4 11.ed4 h6 (11...a5 12.Qe1+=) 12.fe4 (better is 12.a4 Rb8 13.ab5 Rb5 14.fe4+–) 12...f6? (better is 12...a5!? 13.Qh5 Qd7+/–) 13.Be3 (13.d5; 13.Qh5 Ke7+–) 13...h5 14.d5 (14.Rf5 Ne5 15.Rh5 Rh5 16.Qh5 g6+–) 14...Nb8 15.Nd2 Bd6 16.a3 Qe7 17.a4 Qe5+/– 18.ab5 Black gets in control 18...Qh2= 19.Kf2 Qg3 20.Ke2 Qg2 21.Ke1 Qg3 22.Ke2 a6 23.Nc4 Qg4 24.Ke1 Qe4 25.Nd6 cd6 26.ba6?? Qe3–+ 27.Qe2 Qe2 28.Ke2 Na6 29.Kd2? h4 30.b5 Nc7 31.c4 Ra1 32.Ra1 h3 33.Re1 Kf7 34.b6 Na6 35.b7 h2 36.Ra1 h1Q 37.Rh1 Rh1 38.Kd3 Nc5 39.Kd4 Nb7 40.Ke4 g5 41.Kd4 g4 42.c5 dc5 43.Kc4 g3 44.d6 g2 45.Kd5 g1Q 46.Kc6 Qg2 47.Kb6 Rb1 48.Kc7 Nd6! 49.Kd6 Qg5 50.Kc6 Qe5 51.Kd7 Qd5 52.Kc7 Rb7 53.Kc8 Qd7 0–1. maz_manchester – arian1230, ChessWorld.net, 2005.

4.d3 Nf6 5.Bf6 Qf6–/+ 6.Nc3?? Qc3 7.Nd2 Bb4 8.a3 Ba3 9.g3 0-0 10.Bh3 Nd7 11.e3 b4 12.e4 d4 13.0-0 e5 14.f3 Nf6 15.g4 Be6 16.f4 ef4 17.Rf4 a5 18.e5 Nd5 19.Rf3 Ne3 20.Qe1 Nc2 21.Qc1 Bc1 22.Rc1 Qd2 23.Rcf1 Ne3 24.R1f2 Qe1 25.Rf1 Nf1 26.Rf1 Qe3 (26...Qe3 27.Rf2 f6 28.Bf1 fe5 29.Bg2 Qf2 30.Kh1 Qe1 31.Bf1 Qf1#) 0–1. Tiedemann,Marcel (1750) – Neffgen,Dieter (1840), remoteschach.de, 2002.

4.Bb2 Nf6 5.Bb5 c6 6.Be2 =.

4.Bb5 c6 5.Be2 Bb4 6.0-0 Nf6 7.d4 (7.Ba3 Ba3 8.Na3 Qd6=) 7...0-0 (7...Ba6 8.Ne5=) 8.c4 (8.Ba3 Ba3 9.Na3 c5+=) 8...Ba6 (8...dc4 9.Qc2+=) 9.Qa4 (9.Ba3 Qe7 10.Bb4 Qb4+=) 9...Qa5 (9...c5 10.a3 Ba5 11.Bb2=) 10.Qa5+= Ba5 11.Ba3 Rc8 12.Nbd2 Nbd7 13.Rab1 c5 14.Rfc1 (14.dc5 Nc5 15.Bc5 A) < 15...Rc5 16.Nb3 Bc4 17.Bc4 (< 17.Nc5 Be2 18.Rfc1 Bb6+=) 17...Rc4 18.Na5+/–; B) 15...Bd2 16.Nd2 Rc5=) 14...cd4 15.ed4 Nb6 16.Nb3 Bc4 17.Na5 Be2 18.Nc6 Kh8 19.Nfe5 Nc4 20.Ne7 (20.Nc4 Rc6 21.Nd6 Ra6=+) 20...Rf8 21.Nc4 (21.Bc5 Ne4 22.N7c6 Nc5 23.dc5 Ne5 24.Ne5 f6=+) 21...dc4 (21...Bc4 22.Nc6 Rfc8 23.Ne5=+) 22.Nc6= Rfc8. cnita (2110) – pierred (2405), net–chess.com, 2006.

3.Bb2 Bb7 4.e3 Nd7 5.Be2 e5 6.Ne5 Ne5 7.Be5 Nf6 8.a3 Bd6 9.Bd6 Qd6 10.d4 0-0 11.Nd2 a5 12.b5 c5 13.bc6 Bc6 14.Bd3 Rfe8 15.Qf3 Ne4 16.Be4 de4 17.Qg3 Qg6 18.Qg6 fg6 19.c4 b5 20.d5 Bd7 21.c5 Bf5 22.a4 b4 23.Nc4 Red8 24.Rd1 Rac8 25.c6 Kf8 26.Na5 Ke7 27.Nc4 b3 28.d6 Ke6 29.c7 Rd7 30.Nb6 Rcc7 31.dc7 Rc7 32.h3 h5 33.Ke2 Ke7 34.Nd5 Kd6 35.Nc7 Kc7 36.Rd4 g5 37.Rc1 Kb6 38.Rb4 Ka5 39.Rb5 Ka6 40.Rc6 Ka7 41.Rf5 g4 42.Rf7 Kb8 43.Re6 Kc8 44.Re8 1–0. bambinik (2480) – m.a (1685), 2003.

3.Bb2 c5 4.bc5 bc5 5.e3 Nc6 6.Bb5 Bb7 7.Nc3 Nf6 8.0-0 e6 9.Ne5 Qc7 10.Nc6 Bc6 11.Bc6 Qc6 12.Qe2 e5 13.Qb5 Rc8 14.a4 Bd6 15.Qc6 Rc6 16.Nb5 Nd7 (better is 16...Bb8!?=) 17.Na7 Ra6 18.Nb5 0-0 (18...Ke7 19.f4+/–) 19.d4 cd4 (19...ed4 20.ed4 Rc8 21.Nd6 Rd6 22.a5+/–) 20.ed4 e4? (20...Bb8 21.de5 Ne5+/–) 21.Rfc1?? (better is 21.Nd6!? Rd6 22.Ba3 Ra6 23.Bf8 Kf8+–) 21...Bb4 (better is 21...Bf4!? 22.Rcb1 Rfa8+=) 22.c3 Be7 23.Nc7 (better is 23.c4!? Bg5 24.Rc2 dc4 25.Rc4+–) 23...Ra5+= 24.c4 Rc8?? (better is 24...dc4 25.Rc4 Nb6+=) 25.Nd5+– Bg5 26.Rc2?? (26.Rc3 Rb8 27.Rc2 Nb6 28.Nb6 Rb6+–) 26...Kf8?? (better is 26...Rd5 27.a5 e3+/–) 27.c5+– Nf6 28.Nf6 Bf6 29.Rc4 Ke7 30.Bc3 Raa8 31.d5 Kd7? 32.Bf6 gf6 33.a5 f5 34.a6 Ra7 35.Kf1 Rb8 36.Ke2 Rb2 37.Ke3 Kc7 38.Ra3 f6 39.h4 h5 40.f3 Rg2 41.fe4 Rg3–/+ 42.Kf4 Ra3 43.Kf5 R7a6 44.d6 Kc6 45.Kf6 Rf3 46.Kg5 Ra8 47.Kh5?? Rg8 0–1. Fournier,Frederic (1980) – NN, jeu.europe–echecs.com, 2013. (=1.Nf3 d5 2.b4 b6)

3.Bb2 Nc6 4.b5 Nb8 5.h3 c6 6.e3 Bd7 7.Nc3 e6 8.Be2 Bb4 (better is 8...Nf6!?=) 9.Nd5!+/– cd5?? (9...cd5 10.Bg7 Combination; 9...ed5 10.Bg7 Combination) 10.Bg7+– 1–0. Rcamargo – BAFO, playchess.de, 2003. (=1.Nf3 d5 2.b4 b6)

3.Bb2 e6 (--> 1.b4 d5 2.Bb2 e6 3.Nf3 b6).

3.Bb2 Nf6 4.e3 c5 5.a3 d4 (better is 5...e6!?=) 6.ed4+/– cd4 7.Nd4 e6 8.d3 (better is 8.Bb5!? Bd7 9.Qf3+–) 8...Bb7+= 9.Nd2 Be7 10.N2f3 0-0 11.Be2 Nc6 12.Nc6 Bc6 13.0-0 Nd5 14.c4 Nf4 15.Be5 Ne2 (15...Bd6 16.Bf4 Bf4 17.d4+=) 16.Qe2+/– f6 17.Bb2 e5 18.Rfe1 Qc7 19.Nh4 (19.d4 Bf3 20.Qf3 Qc4+/–) 19...Rae8 20.Nf5 Bd7 (20...Bd6 21.Qg4 Kh8 22.d4 ed4 23.Nd6 Qd6 24.Bd4 Re1 25.Re1+/–) 21.Qf3 Bf5 22.Qf5 Bd6 23.g3 a5 24.b5 Bc5 25.Rad1 Rd8 26.Qf3 Rd7 27.Re4 Rfd8 28.Qh5 Rd3= 29.Rd3 Rd3 30.Rg4? Rd1 31.Kg2 Qb7 32.Kh3 Rg1 33.Qe8= Bf8 34.Qc6 Qf7 35.Qd5 Qd5 36.cd5 Kf7 37.Rc4–/+ g5 38.Rc7= Kg6 39.Rc6 h5 40.Rc4?? f5 41.Be5?? g4 42.Kh4 Be7 43.Bf6 Bf6# 0–1. decembernight – klaudiusz501, kurnik, 2011.

3.c4 Bb7 4.Qa4 Nd7 5.cd5 Bd5 (5...Ngf6 6.d3=) 6.Nc3 e6 (6...Bf3 7.gf3 e6 8.f4=) 7.Nd5+= Ngf6?? (better is 7...ed5 8.Bb2 a5+=) 8.Nf6+– gf6 (8...Qf6 9.d4+–) 9.Bb2 (9.d4 b5 10.Qb3 Bd6+–) 9...Qe7 (9...a6 10.Rc1+–) 10.Qc6 Rd8 11.a3 (11.Rc1 Qd6+–) 11...Bh6 (11...Qd6 12.Qa4 Be7 13.Qa7+–) 12.e3 0-0 (12...Rg8 13.Qc7 Ne5 14.Be5 fe5 15.Qe5+–) 13.Qc7 f5 (13...e5+–) 14.Qg3 Bg7 (14...Bg5 15.Ng5 f4 16.ef4 f6 17.Ne6 Kh8+–) 15.Qg7# 1–0. pierre – zebu, internet, 2011.

3.c4 dc4 4.Qc2 =.

3.e3 Nf6 4.Bb2 =.

3.e3 Bg4 4.Bb2 Qd6 5.b5 Nd7 6.a4 e5 7.d3 c5 8.Be2 Bf3 9.Bf3 Ngf6 10.Nd2 Be7 11.e4 d4 12.Nc4 Qc7 13.Qd2 Rd8 14.Be2 0-0 15.Bc1 Ne8 16.Qd1 Nd6 17.Nd6 Qd6 18.Bg4 Rc8 19.f4 f5 20.Bf5 ef4 21.Qg4 Ne5 22.Qh3 Rce8 23.Qh7 Kf7 24.Bf4 Rh8 25.Be5 Rh7 26.Bd6 Bd6 27.Bh7 Rh8 28.Bf5 Bh2 29.Ke2 Rh4 30.Rh2 Rh2 31.Bh3 g5 32.Kf3 1–0. Nordbrink – Boettcher, 1980.

3.Bb2 cb4 4.Nd4 Nc6 5.Nc6 bc6 6.g3 e5 7.Be5 Nf6 8.d4 Bd6 9.Bd6 Qd6 10.Nd2 Ba6 (10...0-0 11.Bg2=+) 11.Bg2 0-0 12.0-0 Rfe8 13.Nf3?? (better 13.Re1=+) 13...Be2-+ 14.Qd2 Bf1 15.Ne5 (15.Rf1 Ne4 16.Qd3-+) 15...Bg2 16.Kg2 Ne4 17.Qe3 Re5 (better 17...c5!? 18.Qf4 f5 19.Nd3-+) 18.de5 Qe5 19.Re1 Qc3 20.Re2 Qe3 21.Re3 a5 22.f3 (22.Rb3 c5 23.Re3 Nc3-+) 22...Nc3 23.a3 (23.Re7 Kf8 24.Re1 Re8-+) 23...c5 (better 23...d4 24.Re1 ba3 25.f4-+) 24.ab4 ab4 25.Rd3 (25.Kf1-+) 25...d4 26.f4 f5 (better 26...Ra2!? 27.Kh3 Rc2 28.Rf3-+) 27.Rd2 Re8 (27...Re8 28.Kf1 Kf7-+) 0-1. xeroxx (2205) - erindreki (2535), Rated Bullet game, lichess.org, 2015. (=1.Nf3 A00: Irregular Openings 1...d5 2.b4 c5)

3.bc5+= Qa5 4.e3 (4.Bb2 Nc6=) 4...Nd7 (4...Nc6 5.c4 dc4 6.Na3+=) 5.Be2 (5.Bb2 Ngf6+=) 5...Nc5 (5...e5 6.Bb2 e4 7.Nd4=) 6.0-0 (6.Bb2 Nf6+=) 6...Bg4 7.d4 (7.Bb2 e6+=) 7...Ne4= 8.Nbd2 (8.c4 dc4 9.Bc4 Ngf6+=) 8...Nc3 9.Qe1 Nf6 (9...Ne2 10.Qe2 Nf6 11.Rb1=) 10.Kh1 (10.Bd3 e6 11.Nb1 Bf3 12.gf3+/– (12.Nc3?! Ne4=; 12.Qc3?! Qc3 13.Nc3 Bh5=)) 10...Ne2+= 11.Qe2 Rc8 12.Qd3 (12.Rb1!?–/+) 12...Rc3–+ 13.Nb3 Qc7 14.Qd1 Ne4 (14...e6 15.Rb1–+) 15.Ba3 Rc2 16.Nc5 (16.Kg1 b6–+) 16...Nf2 (16...Nc5 17.Qc2 Na6 18.Qc7 Nc7 19.Rfc1+/–) 17.Rf2 Rf2 18.Kg1 Bf3 (better is 18...Rf3!? 19.gf3 Bd7–+) 19.Qa4+= Qc6 20.Qc6 bc6 21.Kf2 Be4 22.Ne4 de4 23.Rb1 f5 24.Rb8 Kf7 25.Ra8 h5 26.Ra7 g5 27.Bc5 Kf6 28.Ra8 h4 29.a4 h3 30.g3 f4 31.a5 (31.a5 fe3 32.Ke2+–) 1–0. Pommerel,Wim – Kratz, corr, 1987.

4.Bb2 Qa5!? =.

4.Bb2 Nf6 5.e3 Qa5 6.Bf6 ef6 7.Nc3 +=.

4.e3 Nf6 5.Be2 (5.Nc3 e5 6.d4 ed4 7.ed4 Be7+/–) 5...e5 (5...e6=) 6.Bb5 (better is 6.d4!? ed4 7.ed4+=) 6...Bg4 (6...Bc5 7.Ne5 0-0 8.Nc6 bc6 9.Bc6+=) 7.h3= Bf3 8.Qf3 Bc5 9.Bb2 Bd6 10.Qg3 (better is 10.Nc3!? a6 11.Ba4=) 10...0-0–/+ 11.Bc6 e4 (11...Ne4 12.Qh2 bc6 13.Be5–/+) 12.Qg5= bc6 13.Bf6 Qf6 14.Qf6 gf6 15.0-0 (15.Nc3!?=) 15...Rab8–/+ 16.a4 (16.Nc3 Rb2 17.Rfc1 Rfb8–/+) 16...a6 (16...Rb2 17.Rc1–/+) 17.Rc1 Rb2 0–1. Bah,Ismael (1745) – Kibria,Golam (1895), Saint Denis REU, 2014. (=1.Nf3 d5 2.b4 c5)

4.d4 ed4 5.Nd4 Bc5 6.e3=.

4.d4 e4 5.Ng1 f5 (5...Nf6 6.Bf4+=) 6.Bf4+/- g5 7.Be5 Nf6 8.e3 Bg7 9.Bf6 Qf6 10.Qh5 Qg6 (10...Kd8 11.c4+/-) 11.Be2 (better 11.Qg6!? hg6 12.Nc3+-) 11...Nc6 12.Nh3 f4 (12...Nb4 13.Kd2 Bh6+/-) 13.Qg5 (13.Ng5 Bh6 14.Nh7 Qh5 15.Nf6 Ke7 16.Nh5 (16.Bh5? Kf6 17.Nc3 Be6-+) 16...fe3 17.c3+/-) 13...f3= 14.gf3 (14.Bf1 Bh3 15.Qg6 hg6 16.gh3 Nd4 17.ed4 Bd4+=) 14...Bh3 15.Qg6 (better 15.Qd5!? Qg2 16.Qe4 Kd7 17.Qd5 Kc8 18.Rf1=) 15...hg6-/+ 16.fe4 de4 17.Nc3 (better 17.Rg1!? Bf5 18.Rg2-/+) 17...Nd4! 18.ed4 Bd4 19.Kd2 0-0-0 20.Rab1? (20.Ne4 Ba1 21.Nd6 Rd6 22.cd6-+) 20...Be5 21.Ke3 Bc3 22.Rhg1 (22.Rhd1 Rd1 23.Rd1 Bf5-+) 22...Bf5 (22...Bd4!? 23.Kf4 Rhf8 24.Kg3-+) 23.Rbd1 Rh2 24.Rd6 (24.Bg4 Rd7 25.Bf5 gf5 26.Rg8 Kc7 27.Rd7 Kd7-+) 24...Kc7 (24...Rd6 25.cd6 Bb4 26.Rd1 Bc5 27.Kd2 Rf2 28.Re1-+) 25.Bg4 (25.Rd8 Kd8 26.Bg4 Bb4 27.Bf5 gf5 28.Rd1 Kc7-+) 25...Rd6 26.cd6 Kd6 27.Bf5 gf5 28.Rg6 (28.Rb1-+) 28...Ke5 29.f4 (29.Ke2 Rh1 30.f4 Kf4 31.Rg8 Rh2 32.Kd1 e3 33.Rg4 fg4 34.a3 e2 35.Kc1 e1Q) 29...Kd5 30.Rg5 (30.Rg2 Rg2 31.a3 Bd4) 30…Bd2 (30...Bd4) 0-1. arna (2265) - NevSky (2330), Rated Bullet game, lichess.org, 2015. (=1.Nf3 A04: Unusual lines after 1 Nf3 and King's Indian Attack 1...c5 2.b4 d5)

4.Ne5+/– Bc5 5.e3 Nf6 6.Bb5 Nbd7 7.0-0 0-0 8.Nd3 Bd6 9.Ba3 Nb6 10.Nf4 d4 11.Qf3 Bg4 12.Qb7 a6 13.Bd3 de3 14.de3 Ba3 15.Na3 Rb8 16.Qc6 Rc8 17.Qb7 Rb8 18.Qc6 Rc8 19.Qb7 Rb8 20.Qc6 ½–½. RDN33 – marekt, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 c5)

4.Bb2 Nf6 5.d4 Nc6 6.e3 b6 7.cb6 Qb6 8.Bd3 Qb2 9.Nbd2 Qc3 10.0-0 Bd6 11.Rb1 0-0 12.Re1 Rb8 13.Rb3 Rb3 14.ab3 a5 15.Nb1 Qb2 16.Nfd2 Bb4 17.Re2 Bd2 18.Rd2 Nb4 19.c4 Qa1 20.c5 Ba6 21.Ba6 Na6 22.h3 Nb4 23.Qc1 Ne4 24.Rd1 Rc8 25.f3 Ng3 26.Kh2 Ne2 27.Qd2 Qa2 28.Qa2 Na2 29.Rd2 Nec3 30.Nc3 Nc3 31.Rc2 Nb5 32.Ra2 Ra8 33.b4 a4 34.Kg1 Kf8 35.Kf2 Ke7 36.Ke2 Kd7 37.Kd3 Kc6 38.e4 f6 39.g4 g6 40.ed5 ed5 41.Re2 a3 42.Re6 Kd7 43.Re1 Re8 44.Ra1 g5 45.h4 Rh8 46.Kc2 0-1. ozo (2135) - darhaa (2125), Rated Blitz game, lichess.org, 2015. (=1.Nf3 d5 2.b4 c5)

4.d4 Nc6 5.g3 Nf6 6.Bg2 Be7 7.0-0 0-0 8.Nbd2 b6 9.cb6 Qb6 10.e3 a5 11.Rb1 Qc7 12.c4 Ba6 13.Re1 dc4 14.Ne5 Rac8 15.Nec4 Nb4 16.Ne5 Nbd5 17.Nb3 Nc3 18.Qc2 Nb1 19.Qb1 Qc2 20.Bb2 Qb1 21.Rb1 Rc2 22.Nc5 Bc4 23.a4 Bd5 24.e4 Ba8 25.f3 Bc5 26.dc5 Rc5 27.Bd4 Rc2 28.Bf1 Rfc8 29.Rd1 Ne8 30.Bd3 R2c7 31.Kf2 f6 32.Ng4 Kf7 33.Be3 e5 34.h4 Rc3 35.Ke2 Bb7 36.Bd2 R3c7 37.Ne3 Nd6 38.Nf5 Nc4 39.Ne3 Nd2 40.Rd2 Rc3 41.Nf5 Ba6 42.Nd6 Ke6 43.Nc8 Bc8 44.Bc4 Rc4 Time forfeit 0-1. shtormie (2265) - Art_Vandelay (2025), Rated Bullet game, lichess.org, 2015. (=1.Nf3 d5 2.b4 c5)

4.d4 Nf6 5.e3 Be7 6.Bd3 Ng4 (6...b6 7.cb6 ab6 8.0-0+/–) 7.0-0 b6 8.cb6 Qb6 9.Nbd2 Ba6 10.c4 dc4 (10...0-0 11.Rb1 Qc7 12.Qc2+–) 11.Nc4 (11.Be4!? c3 12.Ba8 cd2 13.Nd2 Bf1 14.Qg4 Bd3 15.Qg7 Rf8+–) 11...Bc4 12.Bc4 Bh4?? (better is 12...0-0+–) 13.Nh4 Nh2 (13...h5 14.Nf3+–) 14.Qa4 Nd7 15.Kh2 0-0 (15...Qc7 16.Kg1 0-0+–) 16.Qd7 Rac8 17.Qb5 (better is 17.Bd3 Rfd8 18.Qb5 Qc7 19.Kg1 Rd5+–) 17...Qc7 18.f4 g5 (18...Qc4 19.Qc4 Rc4+–) 19.Qg5 Kh8 20.Qf6 Kg8 21.Bd3 Qd8+– 22.Qh6 f5 23.Qe6 Rf7 24.Nf5 Kf8 25.Ba3 Re7 26.Nh6 Rcc7 27.Qf7# (27.Qg8) 1–0. Palmi,Herbert (2235) – Janik,Markus (1875), remoteschach.de, 2003.

4.d4 Nf6 5.Bg5 Nc6 6.e3 Be7 7.c3 h6 8.Bh4 0-0 9.Bd3 Ne4 10.Be7 Qe7 11.0-0 f5 12.Nfd2 (12.c4 dc4 13.Bc4 b6 14.cb6 ab6+/-) 12...g5? (12...b6!?=) 13.f3 Nf6 14.c4 Qg7? (14...f4!? 15.Qe1 fe3 16.Qe3 e5 17.cd5 Nd5+=) 15.Qe2 Kh8 16.cd5?? (better 16.Nc3+-) 16...Nd5= 17.Nc4?? (17.Na3 Nd4 18.Qf2 Nc6=) 17...Bd7?? Black prepares the advance f4 (17...Nd4 18.ed4 Qd4 19.Qf2 Qa1-+ (19...Qd3 20.Ne5 Qe3 21.Ng6 Kg7 22.Nf8+/-)) 18.Nbd2 Rg8? (18...f4 19.Nb3 fe3 20.Ne3=) 19.Nd6 (19.Qf2 f4 20.Rab1 Rab8+/-) 19...Raf8? (better 19...f4!? 20.Nb3 Ne3= (worse 20...fe3 21.Bc4+/-)) 20.N2c4 (20.Nb7?! f4 21.Nb3 Ne3=) 20...g4 21.fg4 (21.Nb7?! gf3 22.Qf3 Ndb4=) 21...f4 22.ef4?? (22.Rab1 Nc3 23.Qf3 Nb1 24.Rb1 Qg4 25.Qg4 Rg4 26.Rb7 Rg7+-) 22...Nf4?? (better 22...Qd4 23.Qf2 Qd3=+) 23.Qe4 Nd4?? (better 23...Qd4 24.Qd4 Nd4+/-) 24.Rf4 (24.Ne5 Nc6 25.Nd7 Qd4 26.Qd4 Nd4 27.Nf8 Nd3+-) 24...Rf4 (24...Ne2 25.Be2 Qa1 26.Bf1+-) 25.Qf4 Bc6 (25...Rf8 26.Qe5 Bc6+-) 26.Nf7 (26.Nf7 Qf7 27.Qh6 Qh7 28.Qh7) 1-0. JekkuNaama (2510) - Silent_Bluntman (2425), Rated Bullet game, lichess.org, 2015. (=1.Nf3 A00: Irregular Openings 1...d5 2.b4 c5)

4.e3 Bc5= 5.d4 Be7 6.Bd2 Nf6 7.c4 Ne4 8.cd5 Nd2 (better 8...ed5 9.Bb5 Nc6=) 9.Bd3?? (9.Nbd2 ed5 10.Bb5 Nc6+=) 9...ed5 (better 9...Nf3 10.Qf3 Qa5 11.Nd2 ed5-+) 10.Qd2 (10.Nbd2 Nc6+=) 10...Nc6= 11.Ne5 (11.0-0=) 11...f6 (11...Bb4 12.Nc3 Ne5 13.de5 Qa5-+) 12.f4?? (better 12.Nc6 bc6 13.Qc2+/-) 12...fe5-+ 13.fe5 0-0 14.Bh7 (14.Nc3-+) 14...Kh7 15.Nc3 Kg8 16.Rd1 Be6 17.Rf1 Bb4 18.Rf8 Kf8 19.Ke2 (19.Rb1 Rc8 20.Rb3 Qa5-+) 19...Bc3 (19...Bg4 20.Kd3 Ke8 21.Rc1-+) 20.Qc3 (20.Rf1 Kg8 21.Qc3 Qg5-+) 20...Qb6 (better 20...Bg4 21.Kd2 Bd1 22.Kd1 Qg5-+) 21.Rb1 (21.Kf2 Kg8-+) 21...Qa6 (better 21...Qb1 22.Qe1 Qa2 23.Kf1-+) 22.Kd1 (22.Kf3 Kg8 23.Kg3 Ne7-+) 22...Kg8 23.Qc5 (23.Rb2 Rf8 24.Rc2 Qf1 25.Qe1 Bg4 26.Re2 Be2 27.Kd2 Qg2 28.Kc3 Rc8 29.Qb1 Nd4 30.Kb2 Bd3 31.Qc2 Qc2 32.Ka3 Qc3 33.Ka4 b5) 23...Rc8 (better 23...Qf1 24.Kd2 Qb1-+) 24.Rc1 (24.Qb5 Qa2 25.Qb2 Qc4-+) 24...Rc7 (better 24...Qd3 25.Ke1 Qe3 26.Kd1 Bg4 27.Kc2 Nb4 28.Kb2 Nd3 29.Kc3 Nc5 30.Kb4 Qd4 31.Ka3 Qa4 32.Kb2 Nd3 33.Kb1 Rc1) 25.Qd6 (25.Kd2 Nd4! 26.Qc7 Qe2 27.Kc3 Nb5 28.Kb3 Nc7 29.Rc7 d4 30.Ka3 Qa2 31.Kb4 Qb3 32.Ka5 Bc4 33.Rc8 Kh7 34.Rc4 Qc4 35.ed4 b6) 25...Qa3 (25...Qd3 26.Ke1 Qe3 27.Kd1 Bg4 28.Kc2 Nd4 29.Kb1 Qc1) 26.Rc6 (better 26.Qa3 Kf7 27.Kd2+-) 26...Qd6 (better 26...Qd3 27.Kc1 Rc6 28.Qc6 Qe3 29.Kb2 bc6 30.Kc2 Bf5 31.Kb2 Qd4 32.Kb3 a5 33.a4 Bb1 34.e6 Qb4) 27.Rd6-/+ (27.ed6?? Rc6 28.h3 Rd6-+) 27...Bg4 28.Ke1 Rc6 (better 28...Rc2 29.h3 Bf5-/+) 29.Kf2? (better 29.Rd5 Rc2 30.Rd8 Kf7 31.Rb8=) 29...Rd6-+ 30.Kg3?? (30.ed6 Kf7 31.Kg3-+) 30...Rg6 31.e4 (31.e4 Bf5 32.Kf4 Be4 33.g4-+). DoNotBerserkMe (2255) - universe64 (2145), Anderssen Arena, 2018. (=1.Nf3 c5 2.b4 d5 3.bc5 e6)

3.a3 g6 4.d4 Nf6 5.Bf4 Bg7 6.e3 a5 7.Nbd2 0-0 8.Bd3 Bf5 9.Bf5 gf5 10.c4 Ne4 11.0-0 Nd7 12.Qe2 e6 13.b5 Qe7 14.bc6 bc6 15.Rfc1 Ndf6 16.cd5 cd5 17.Rc7 Qe8 18.Rac1 Qa4 19.Nb1 Nh5 20.Be5 Be5 21.Ne5 Nhf6 22.f3 Nd6 23.Qf2 Qe8?? (better is 23...Nfe8 24.Qg3 Kh8+/–) 24.Qh4+– Qd8 (24...Ng4 25.Qg5 Kh8 26.fg4+–) 25.Nc6 Qc7 26.Qg5 (26.Qf6?! Rfc8 27.Qg5 Kf8=) 26...Kh8 27.Qf6 Kg8 28.Ne7 Qe7 29.Qe7 Nc4 30.e4 fe4 31.fe4 Rfd8 (31...h6 32.ed5 ed5+–) 32.Rc3 f5 (32...Ne3 33.Re3 Kh8 34.Rg3 h6 35.Qf6 Kh7 36.Qg7) 33.Rg3 (33...Kh8 34.Qf6) 1–0. marekt (2245) – vpantev (2125), ICC, 2003.

3.a4 a6 4.e3 Nf6 5.Bb2 Bf5 6.b5 ab5 7.ab5 Ra1 8.Ba1 e6 9.bc6 Nc6 10.Nc3 (10.Bb5 Qb6 11.Nd4 Bg6=) 10...Be7 11.Bb5 0-0 12.0-0 Qc7 13.Bb2 Ne4 14.Qa1 Nc3 15.Bc3 f6 16.Rb1 (16.Bc6 bc6 17.Nd4 Rb8=) 16...e5 (better 16...Bc2!? 17.Rc1 Bg6-/+) 17.Qa2 Be6 18.e4 Rd8 (18...Qd6 19.Qa4=) 19.ed5 Bd5 20.Bc4 Bc4 21.Qc4 Kf8 22.Qh4 (22.d3 Rc8+=) 22...h6 (22...Kg8 23.Qg4=) 23.d3 (23.Qc4 Qd7+=) 23...Qd7 24.Qe4 Rc8 25.Rb3 Rc7 26.Qh7 Kf7 27.Nh4?? (27.h3 Nd4 28.Bd4 ed4=) 27...Bf8?? (better 27...Nd4 28.Qg6 Kf8-+) 28.Qg6 (28.Nf5 Ke8+=) 28...Ke6 (better 28...Kg8 29.Nf5 Ne7 30.Nh6 Kh8=) 29.Nf5+/- Ne7 30.Ng7?? (better 30.Ne7 Qa4 31.Nc6 Qc6 32.h4+=) 30...Bg7-+ 31.Qg7 Nd5?? (better 31...Rc3 32.Qg4 f5 33.Rb6 Rc6-+) 32.Qg8 (32.Qg4!? Kf7 33.Qd7 Rd7 34.Bd2+/-) 32...Qf7+= 33.Qd8?? (33.Qf7 Kf7 34.Bd2 Rc2 35.Bh6 Kg6+=) 33...Qd7?? (better 33...Nc3 34.Rb6 Rc6 35.Qc8 Kd6 36.Qd8 Kc5-+) 34.Qg8 Qf7 35.Qg4?? (35.Qf7 Kf7 36.Bd2 Rc2 37.Bh6+= (worse 37.Rb7 Kg6 38.Be3 Rc3=+)) 35...Ke7?? (better 35...f5 36.Qh4 Rc3 (worse 36...Nc3 37.Rb6 Kd7 38.Rh6=) 37.Rc3 Nc3 38.Qh6 Qf6-/+) 36.Bb4 (36.Bd2 h5 37.Qd1 Ke8+-) 36...Nb4 37.Qb4 Kd7 (37...Ke8 38.Ra3+-) 38.Qb5 (38.Qb7 Qh5 39.Qd5 Ke7+-) 38...Kd8 39.Ra3 Rc8 (39...Rc2!? 40.Qb6 Qc7 41.Qf6 Kd7 42.Qg7 Kc6 43.Qh6 Kd5+-) 40.Qb6+- Qc7 (better 40...Ke8+-) 41.Qc7?? (better 41.Qf6 Qe7 42.Qb6 Ke8 43.Ra7+-) 41...Rc7+/- 42.Ra2 Kd7 43.Kf1 Kd6 44.Ke2 Kc5 45.Kd2 Kd4 (45...Rg7 46.g3+/-) 46.c3! Kd5 (46...Rc3 47.Ra4 Deflection (47.Ra4 Decoy)) 47.Ra4 f5 (47...Rg7 48.g3+/-) 48.Ra5 b5? (better 48...Ke6+-) 49.Rb5 Kd6 50.Rb6 Rc6 (50...Kc5 51.Rh6 f4+-) 51.Rc6 Kc6 52.Ke3 Kd5 53.f4 Ke6 54.fe5 Ke5 55.d4 Ke6 56.Kf4 Kf6 57.d5 h5 58.c4 (58.c4 Kg6 59.c5+-) 1-0. Cortado (2630) - universe64 (2420), lichess.org, 2019.

3.a4 e5 4.Ne5 Bb4 5.e3 Nh6 6.c3 Ba5 7.d3 0-0=+ 8.e4 Qf6 9.d4=+ de4 10.h4 Nd7 11.Bg5 Qf5 12.Bh6 gh6 13.Bc4? Ne5–+ 14.de5 e3 15.fe3 Qe5 16.Ra3?? Qe3 17.Qe2 Qe2 18.Ke2 Bg4 19.Ke3 Rad8 20.Kf4 h5 21.Rf1 Kg7 22.Nd2?? Rd2 23.Kg3 Bc7 24.Rf4 Bf4 25.Kf4 Rg2 26.Rb3 b6 27.Kg5 Rf2 28.Rb1 Rf5# 0–1. piotrus – ANJI, internet, 2010.

3.Bb2 (--> 1.b4 c6 2.Bb2 d5 3.Nf3).

3.c3 Nf6 4.a4 e6 5.a5 (5.d3=+) 5...b6 (5...Bd6!?-/+) 6.ab6= Qb6 7.e3 (7.d3=) 7...c5 (better 7...Bd6!?=+) 8.bc5+= Bc5 9.Be2 (9.d4 Be7+=) 9...Nbd7 (9...Nc6 10.d4 Bd6 11.Nbd2=) 10.0-0 Bb7 11.Na3 (11.d4 Be7+=) 11...0-0 12.c4 dc4 13.Nc4 Qc6 (13...Qc7 14.d4 Bb4 15.Bb2+=) 14.Bb2 Nd5 (14...Ne4 15.Qc2+/-) 15.d4 Be7 16.Rb1 (16.Nce5 Ne5 17.Ne5 Qb6+/-) 16...Rab8+= 17.Qd2 Rfc8 (17...Bb4 18.Qd3+=) 18.Rfc1+/- N7b6 19.Na5 Qd7 (19...Qa4 20.Nb7 Rb7 21.Rc8 Nc8 22.e4+/-) 20.Nb7 (20.Ne5!? Rc1 21.Qc1+/- (worse 21.Bc1 Qc7+=)) 20...Qb7+= 21.Ne5 f6 22.Nd3 Qd7 (22...Na4 23.Rc8 Rc8 24.Rc1=) 23.Rc8 (23.e4!? Nc4 24.Rc4 Rc4 25.ed5 Rd4 26.de6 (26.Bd4?! Rb1 27.Bf1 Qd5 28.Ba7 Qc4=) 26...Qe6 27.Bf1+/-) 23...Rc8+= 24.Ne1 (24.Rc1!?+=) 24...Nc4 25.Bc4 Rc4 26.h3 (26.Nd3 Nb4=) 26...Bb4 27.Qd1 Qc6 28.Nf3 (28.Nd3 a5=) 28...Rc2 (28...a5 29.Qf1=+) 29.Rc1 (better 29.e4!? Nf4 30.d5=) 29...Rc1-/+ 30.Bc1 Qb5 (30...a5 31.Bb2-/+) 31.Bd2 Qa5 (31...a5 32.e4 Nb6 33.Qb1=) 32.Bb4 (32.e4 Ne7=) 32...Qb4 33.Qc2 Kf7 (33...a5 34.Qe4 Qb6 35.Qc2=+) 34.Qc8 (34.Qh7!? a5 35.g4+=) 34...Qb1 (34...a5 35.Qd8-/+) 35.Kh2= Kg6?? (better 35...a5=) 36.Qe6+- Nc3 (36...Qb8 37.g3 Kh6 38.Qd5 Qc7+-) 37.Ne5 Kg5 (37...Kh6 38.g4 g6 39.Qg8 Qb8 40.Qb8 Kg7 41.Qc7 Kh6 42.Nf7 Kg7 43.Ng5 Kh6 44.Qh7 Kg5 45.f4) 38.Qg4 Kh6 39.Qh4 1-0. olborg (2015) - gullefjun (2055), Rated Bullet game, lichess.org, 2015. (=1.Nf3 A00: Irregular Openings 1...c6 2.b4 d5)

3.c3 Bg4 4.Ne5 Bh5 5.Ng4?? Bg4–+ 0–1. IgnacioRomero – ANJI, internet, 2010.

3.Nc3 Nf6 4.e3 e6 5.a3 Bd6 6.Be2 0-0 7.0-0 Nbd7 8.Bb2 e5 9.h3 Re8 10.d3 Bb8 (10...a5 11.b5=+) 11.Qd2 Qc7 12.e4 d4 13.Na2 b6 14.c3 c5 15.Nh4 (15.Rac1 Qd6=) 15...Nf8 (15...dc3 16.Nc3 cb4 17.ab4=) 16.bc5 bc5 17.Rab1 a5 18.Nc1 a4 19.Bf3 Ra6 20.Ne2 Be6 21.Rfc1 Qe7 0–1. Rivenburg,John (1800) – von Buttlar,Paul (1720), FICGS, 2009.

3.c4 e5 4.Ne5 Bb4 5.cd5 Bd6 6.Nc4 cd5 7.Nd6 Qd6 8.Ba3 Qf6 (better 8...Qd8!?+/-) 9.Nc3+- Be6? (9...Nc6 10.Nb5 Rb8 11.Bd6+-) 10.Qb3?? (better 10.Nb5 Kd7 11.Rc1+-) 10...b6 11.Rc1 Ne7 12.Qa4 (better 12.Be7 Qe7 13.Nd5+-) 12...Nec6?? (better 12...Nd7+/-) 13.Nb5+- Kd7 14.e3 Qg6 (14...Rc8 15.Nd6 Rc7 16.Be2+-) 15.Nd4 (better 15.Qf4 Rc8 16.Qd6 Ke8 17.Nc7 Rc7 18.Qc7+-) 15...Rc8 16.g3 (16.Ba6 Rc7 17.Bb7 Qg2 18.Nc6 (18.Ba8 Qh1 19.Ke2 Bg4 20.f3 Bf3 21.Kd3 Be4 22.Kc3 Qh2-/+; 18.Bc6?! Nc6 19.Rf1 Bh3=+) 18...Qh1 19.Ke2 Qc1 20.Nb8 (20.Ba8?! Qc4 21.Qc4 dc4 22.Nb8 Kc8+=) 20...Kd8 21.Nc6 (21.Bc1?! Rb8 22.Ba6 Rc1+-; 21.Ba8?! Qc4 22.Qc4 Rc4+=) 21...Ke8 22.Bc1 (22.Ba8?! Qc4 23.Qc4 dc4+/-) 22...Rb7 23.Ba3+-) 16...Qe4 (16...a6+-) 17.f3 a6 (17...Qe5 18.Ba6 Kd8 19.Bc8 Nd4+-) 18.fe4 1-0. Morkva (2445) - Nimrod64 (2235), Rated Bullet game, lichess.org, 2015. (=1.Nf3 A00: Irregular Openings 1...d5 2.b4 c6)

3.d4 Qb6 4.a3 a5 5.c3 Bf5 6.Nh4 Bg6 7.Ng6 hg6 8.Bf4 ab4 9.cb4 e6 10.Nc3 Nf6 11.h3 Ne4 12.Ne4 de4 13.g4? (better is 13.f3!?+=) 13...Ra3–+ 14.Bg2 Bb4 15.Kf1 Ra1 16.Qa1 Na6 17.Be4 Qa5 18.Qb1 g5 19.Bg3 Qa3 20.Kg2 Qc3 21.e3 Qa3 22.Be5 f6 23.Bg3 Kd7 24.Bh7 Nc7 25.Qg6 Bf8 26.Rb1 Kc8 27.Qc2 Bd6 28.Rb3 Qb3 29.Qb3 Bg3 30.Bg6 Bd6+= 31.Bf7 e5 32.de5 Be5 33.Qb4 Rd8 34.Kf3 Bd6 35.Qe4 Bf8 36.Kg3 Bd6 37.Kg2 Bf8 38.f4 gf4 39.ef4 c5 40.g5 fg5 41.fg5 b5 42.Bh5 Bd6?? 43.Qc6+– (43.Qc6 Bf4 44.Bg4 Kb8 45.Qb6 Ka8 46.Bf3 Rd5 47.Qc5+–) 1–0. Kleman,M (2260) – Vacek,O (2110), Int ch–SVK OpenA, Banska Stiavnica SVK, 2010.

3.d4 Bf5 4.e3 Nf6 5.Bd3 (5.Be2 e6 6.a3 Bd6=) 5...Bd3=+ 6.Qd3 e6 7.a3 Nbd7 8.Nc3 a5 9.b5 c5 (9...cb5 10.Nb5 Rc8 11.Rb1=) 10.Bb2 (10.e4 cd4 11.Nd4 Nc5–/+) 10...Rc8 (10...c4!? 11.Qe2 Bd6=) 11.dc5 (11.0-0 Bd6=) 11…Nc5 =+. Schulz,Hans_Juergen – Haertig,Manfred, TT–06 TSC, 2003.

3.e3 e6 4.Bb2 a6 (4...Bb4?? 5.Bg7 Nf6 6.Bh8+–) 5.c4 Bb4?? (better is 5...Nf6 6.c5 b6=) 6.Bg7+– Nf6 7.Bh8 Kd7 8.Bg7 Bf8 9.Bf8 Qf8 10.cd5 cd5 11.Qa4 Nc6 12.Ne5 Kc7 (12...Kd8 13.Nc6 bc6 14.Qc6+–) 13.Nc6 bc6 14.Na3 (better is 14.Qf4 Kd7 15.Qf6 Qe7 16.Qe7 Ke7+–) 14...Ne4 15.Rc1 Bb7 16.Qa5 Kc8 17.Bd3 Nd6 18.0-0 Qd8 19.Qd8 Kd8 20.Nc2 (20.Bh7 Nb5 21.Nb1 Ke7+–) 20...Ke7 21.Nd4 c5 22.Rc5 Bc8 23.Rc7 Bd7 24.Nc6 Ke8 25.Ne5 Bb5 26.Bb5 ab5 27.Rfc1 f6 28.Ng4 f5 29.Nf6 Kd8 30.Rd7# 1–0. iwan19999 (1720) – robin26, kurnik, 2012.

3.e3 f6 4.d4 Nh6 5.c4 Nf7 6.Bb2 e6 7.a3 a5 8.Qb3 dc4 9.Bc4 Qe7 (9...ab4 10.0-0+/–) 10.Nbd2 (10.ba5 c5 11.Be2+–) 10...Nd7? (better is 10...ab4!? 11.ab4 Ra1 12.Ba1 b5+=) 11.b5 (better is 11.ba5!? Ra5 12.0-0 Nb8+–) 11...Nb6+/– 12.bc6 Nc4 13.Nc4 bc6 14.a4 (14.0-0!?+/–) 14...Qc7 15.0-0 Bb4 (15...Rb8 16.Qd3=) 16.Rfc1 (16.Ba3!? Ba3 17.Qa3+/–) 16...0-0= 17.e4 Rb8 18.Qc2 Ba6 19.Rab1 c5 20.d5 ed5–/+ 21.ed5 Nd6 22.Ne3 Rbe8 23.Bc3 Qa7 24.Bb4 cb4 25.Qc7 Rf7?? 26.Qd6+– Rd7 27.Qc6 Rc8 28.Qe6 Kf8 29.Rc8 Bc8 30.Rc1 Qb7 31.Nf5 g6?? 32.Nd6 Qb6 33.Qe8 Kg7+– 34.Nc8 Rc7 35.Ne7 Rc1 (35...Rc1 36.Ne1 Re1#) 0–1. atanas70 (1635) – bruziewicz (1730), kurnik, 2012.

3.g3 Bf5 4.Bg2 Nd7 5.Bb2 Ngf6 6.0-0 Qc7 7.d4 h5 8.Nbd2= e6 9.a3 Be7 10.c4 Ne4 11.c5 Bf6 12.Ne1 Nd2 13.Qd2 g5 14.f3 h4 15.g4 h3 16.Bh1 Bg6 17.e4 de4 18.fe4+= Rh4 19.Bf3 0-0-0 20.Qe2 e5=+ 21.d5 cd5 22.ed5 e4 23.d6 Qc6 24.Bf6 Nf6 25.Kh1?? ef3–+ 26.Nf3 Re8 27.b5?? Re2 28.bc6 Be4 29.cb7 Bb7 30.c6–/+ Bc6 31.Rac1 Kd7 32.Rc6 Kc6 33.Nd4 Kd6 34.Ne2 Ke7 35.Nd4 Rg4 36.Nc6 Ke6 37.Na7? Ne4 38.Nb5?? Rg2 39.Re1 Kd5 40.Nc7 Kd4 41.Nb5 Kd3 42.Re4 Ke4 43.Nd6 Kd3 (43...Kd3 44.Nf5 Ke2 45.Ng3 Kf3 46.Ne4 Ke4 47.a4 Ra2 48.Kg1 Ke3 49.a5 Ra1#; 43...Ke3 44.a4 Re2 45.Nf5 Kf2 46.Ne3 Re1 47.Nf1 Rf1#) 0–1. Litwinczuk,Walter – Coudari,Camille, CAN–ch Pointe Claire, 1969.

4.Bb2 Nd7 5.e3 Ngf6 6.Be2 e6 7.Nh4 Bg6 8.0-0 Bd6 9.f4 0-0= (9...Qc7=) 10.Ng6 hg6 11.Qe1 a5 12.b5 Ne4+= (12...Qc7 13.bc6 bc6 14.Qh4 Rab8 15.Ra2 Be7 16.Qg3 Ne4=) 13.Nc3 f5+/– (13...Nc3 14.Bc3 Nf6 15.Be5 cb5 16.Bb5 Qe7 17.Bd6 Qd6 18.Qh4+=) 14.Ne4 de4 15.Qg3 Kf7 16.bc6 bc6 17.d3 ed3 18.cd3 Nf6 19.Rab1 Bc5 20.Rfc1 Qe7 21.a4 Rfc8+– (21...Rab8 22.Bf1 Nd5 23.d4 Ba3 24.Rc2 Rb3 25.Ba3 Ra3+/–) 22.Bf6 gf6 23.Rc5 Qc5 24.Rb7 Qe7 25.Re7 Ke7 26.Qg6 Rab8 27.Qg7 Kd6 28.Qf6 Rb1 29.Kf2 Rcb8 30.Qe5 Ke7 31.Qc7 Kf6 32.d4 R8b6 33.e4 fe4 1–0. themonkey (2100) – Chapazo (1950), GameColony.com, 2002.

4.Bb2 Nd7 5.e3 Ngf6 6.Be2 e6 7.Nh4 Bg6 8.0-0 Bd6 9.f4 0-0 10.Ng6 hg6 11.Qe1 e5 12.fe5 Be5 13.Be5 Ne5 14.d4 Neg4 15.Qg3 Qd7 16.h3 Nh6 17.Bd3 Rae8 18.Nd2 Re7 19.Rf6!! gf6 20.Bg6!! fg6 21.Qg6 Rg7 22.Qh6 Qf5 23.e4 de4 24.Rf1 Qg5 25.Qg5 fg5 26.Rf8 Kf8 27.Ne4 Ke7 28.c4 Ke6 29.Kf2 b5 30.Nc5 Kd6 31.cb5 cb5 32.Kf3 Kd5 33.Kg4 Rg8 34.Kh5 Kd4 35.Ne6 Kc3 36.Kg4 Kb3 37.Ng5 Ka3 38.h4 Kb4 39.h5 a5 40.h6 a4 41.h7 Rh8 42.Ne6 a3 43.Nd4 Rh7 44.Nc2 Kb3 45.Na3 0–1. themonkey – NN, GameColony.com, 2002.

4.Bb2 e6 5.Nd4 Bg6 6.e3 =.

4.Bb2 e6 5.e3 Nf6 6.Be2 Be7 7.Nh4 Bg6 8.0-0 Qc7 9.f4 Nbd7 10.Nc3 Ne4 11.Ng6+/– hg6 12.Ne4 de4 13.Bg7 Rh7 14.Bd4 0-0-0 15.Ba7 b6?? 16.Ba6+– Qb7 1–0. wesolyPolak (1750) – NN, GameColony.com, 2002.

4.d3 a5 5.b5 (5.ba5 Qa5 6.Bd2 Qd8=) 5...Nf6 6.Nc3 (6.Nd4 Bd7+=) 6...e6 (6...d4 7.Nb1+=) 7.h3 (7.e3 Bd6=) 7...Bd6 (7...d4 8.e4 Bh3 9.Ne2+=) 8.bc6 (8.g4 Bg6+=) 8...bc6 9.e4 (9.g4 Bg6+=) 9...de4–/+ 10.de4 Be4 11.Ne4 Ne4 12.Bd3 (12.Qd3 f5+=) 12...Nc5–/+ 13.Be3 Qe7 14.Qd2 (14.Bc4 0-0–/+) 14...0-0 15.Rd1 (15.Qc3!?–/+) 15...Nd3–+ 16.Qd3 Ba3 17.0-0 h6 (17...a4 18.Ng5 g6 19.Qd4–+) 18.Qd4 a4 19.Rd3 Qb4 (19...Bb4 20.c3 Ba3 21.Ra1–/+) 20.Ra1–/+ c5 21.Qd6 Ra6 22.Qc7 Bb2 23.Bc5 Qc4 (23...Qa5 24.Qe7 Rc8 25.Qb7 Qc5 26.Qb2–/+) 24.Ne5 (24.Rb1 Qc2 25.Rb2 Qb2 26.Bf8 Qb1 27.Kh2 Qd3 28.Qb8 Qe4 29.Ba3 Kh7+=) 24...Be5 (24...Qc2 25.Rg3 Kh8 26.Nf7 Rf7 27.Qb8 Kh7 28.Re1–+) 25.Qe5–/+ Nc6 26.Qe3 Rd8 (26...Rb8 27.Bd6 Rb2 28.Rc3–/+) 27.Rc3 (27.Rd8 Nd8 28.c3 Nc6–/+) 27...Qb5 28.Qe4 (28.Rd3 Rd3 29.cd3 Qb2–+) 28...Rd5 29.Ba3 Ra8 30.Rc4 Kh8 (30...e5 31.Qh4–+) 31.Qh4 f6 (31...e5 32.Rc3–+) 32.Kh2 (32.Re4 Rd2–/+) 32...Rd2 33.Re1 (33.c3 Qe5 34.Kg1 Rad8–/+) 33...Ne5 34.Rc3 (34.Rc5 Qd7–/+) 34...Qd5 (34...Qb8 35.Kg1 Qd8 36.Rc5–/+) 35.Qg3 Nc4 36.Bc1 Rd4 37.Be3 Ne3 (37...Re4 38.Rd3 Qe5 39.f4–+) 38.Ree3 Rc4 (38...Qd6 39.Qd6 Rd6 40.Ra3–/+) 39.Rcd3 (39.Rc4 Qc4 40.Rc3 Qb4–/+) 39...Qf5 (39...Qg5 40.Ra3 Qg3 41.Kg3–+) 40.Rd7 Rg8 (40...Qg5 41.Qf3 Qf4 42.Qf4 Rf4 43.Re6 Rf2 44.Ree7+=) 41.Qd6 (41.c3 e5 42.Ra7 h5–/+) 41...Rc2 (41...Qf2 42.Rg3 Rcc8 43.Qe6 Qc2 44.Re7–+) 42.Rg3 Rcc8 (42...Qf2?! 43.Rdg7 Rcc8 44.Qe6 Rg7 45.Qc8 Kh7 46.Rg7 Kg7 47.Qd7 Kg6 48.Qa4=; 42...Rf2 43.Rdg7 Rc8 44.R7g6 Qg6 45.Rg6+–) 43.Qa6 (43.Rf3 Qe5 44.Qe5 fe5–/+) 43...Rcd8 (43...Ra8 44.Rdg7 Qe4 45.Rg8 Rg8 46.Rf3–/+) 44.Qa4 (44.Rgg7 Qf4 45.Kg1 Qc1 (45...Rg7?! 46.Rd8 Rg8 47.Rg8 Kg8 48.Qc8 Kf7 49.Qd7 Kg6 50.Qe8 Kg5 51.Qg8 Kf5 52.Qh7 Ke5 53.Qc7 Kf5 54.Qh7 Ke5 55.Qc7 Kf5 56.Qh7=) 46.Kh2 Rd7 (46...Rg7?! 47.Rd8 Kh7 48.Qe6 Qf4 49.Kg1=) 47.Rd7 Qf4 48.Kg1 Qf3–/+) 44...Qf2 45.Rgg7 (45.Rd8 Rd8 46.Qg4 Qa7 47.Qe6 Qc7–/+) 45...Rd7 46.Rg8 Kg8 47.Qd7 Qf4 48.Kh1 (48.g3 Qf2 49.Kh1 Qe3–/+) 48...e5 (48...Qe3 49.g3–/+) 49.Qe7 (49.Qe8 Kg7–/+) 49...Qf5 (49...f5 50.Qe6 Kg7 51.g3 Qg3 52.Qf5–+) 50.h4 (50.g4 Qg6–/+) 50...Qf4 (50...Qg6 51.Qe6 Kg7 52.Qd7 Qf7 53.Qg4 Kf8 54.Qc8 Qe8 55.Qf5–/+) 51.Qe8 Kg7 52.h5 Qg4 53.Kg1 e4 (53...Kh7!?+=) 54.Qe7= Kg8 55.Qe8 Kh7 56.Qe7 Kg8 57.Qf6 (57.Qe8 Kg7 58.Qe7 Kh8 59.Qf6 Qg7=) 57...e3 58.Qd8 Kf7 59.Qc7 Kf6 60.Qc3 Kf5 61.Qe3 Qh5 62.Qc5 Kg4 63.Qc4 Kg5 64.Qd3 Qg4 65.Qd5 Kh4 66.Qd8 Kh5 67.Qe8 Kg5 68.Qg8 Kf4 69.Qc4 Kg3 70.Qc7 Qf4 71.Qf4 ½–½. Strelka 5?5 64_bit – Stockfish 5 64_bit, CCRL, 2014.

4.d3 e6 5.Nh4?? (better 5.Nd4=) 5...Qh4-+ 6.g3 Qd8 7.Bb2 Nf6 8.Nd2 a5 9.Rb1 (9.ba5 Qa5 10.Bf6 gf6-+) 9...ab4 10.ab4 Bb4 11.c3 (11.Bf6 Bd2 (11...gf6?! 12.Rb4 b5 13.Bg2-/+; 11...Qf6?! 12.Rb4 b5 13.e4-+) 12.Kd2 Qf6 13.Rb7 e5-+) 11...Be7 12.Bg2 Nbd7 13.0-0 0-0 14.e4 de4 15.de4 Bg6 16.Qe2 Qa5 17.c4 Nc5 18.f4 (18.Ra1 Qc7-+) 18...Rfd8 19.Rfd1 Qb4 (19...Bh5 20.Nf3 Nce4 21.Rd8 Rd8 22.Bf6 Qa7 23.Kh1 Nf2 24.Kg1 Nd3 25.Kf1 Bf6 26.Rd1-+) 20.g4?? (better 20.Bf6 Rd2 21.Rb4 Re2 22.Be7 Ne4 23.Rb7-/+) 20...Qa5 (better 20...Nfe4 21.Bd4 Nc3-+) 21.f5 ef5 (21...Nfe4!? 22.Ne4 ef5 23.gf5 Bf5 24.Ra1 Rd1 25.Qd1-+) 22.ef5 Re8 23.fg6 hg6 24.Qf3 g5 25.Qf5 Ne6 (25...Rad8 26.Nf3 Rd1 27.Rd1-+) 26.Nf3? (better 26.Qa5 Ra5 27.Bf6 Bf6 28.Rb7-/+) 26...Qc5-+ 27.Kh1 Qf5 (27...Qc4 28.Bf6 Bf6 29.Rb7-+) 28.gf5 Nf4 29.Ng5 (29.Bf6 Bf6 (29...gf6?! 30.Rb7 Bc5 31.Rc7-+) 30.Rb7 Re2-+) 29...Ng2?? (better 29...Ng4 30.Ne4 Ng2 31.Kg2 Ne3 32.Kf3 Nd1 (worse 32...Nc4 33.Bc3-+) 33.Rd1 Ra2 34.Bg7 Kg7 35.f6 Bf6 36.Rg1 Kh6 37.Nf6 Re6 38.Ng4 Kh5-+) 30.Kg2-/+ Ng4 31.Nf3? (better 31.Bc1-/+) 31...Ne3-+ 32.Kf2 (32.Kg3 Bd6!! 33.Kh3 Nd1 34.Rd1 Bh2 35.Nh2 Re3 36.Kg4-+) 32...Nd1 33.Rd1 Ra2 34.Rd2 Bf6 (34...Bb4 35.Bc3 Rd2 36.Bd2 Bc5 37.Kf1-+) 35.Bc1?! (35.Bf6 Rd2 36.Nd2 gf6 37.Kf3-+) 35...Rd2 36.Bd2 Re4 37.c5 Rc4 38.Be3 Rc2 39.Kg3 (39.Ke1 Be7 40.Kd1 Rc3-+) 39...Rc3 40.Kf4 Be7 41.Ke4 Bc5 42.Bd2 Rc2 43.Kd3 Ra2 44.Ne5 (44.h4 Bd6-+) 44...Bf8 45.Nd7 Ra3 46.Ke2 b5 (46...Ra4 47.Kd3-+) 47.Nb6?? (47.Nf8 Ra7 48.Bb4-+) 47...b4 (47...Bc5 48.Nd7 Bd6 49.Be3-+) 48.Nc4 Ra2 (48...Rh3!? 49.Bf4-+) 49.Kd3 b3 (49...Be7!? 50.h4-+) 50.Kc3 Ba3 (50...b2 51.Nb2 Ra5 52.f6-+) 51.Na3?? (better 51.Kb3 Rd2! 52.Nd2-/+) 51...Ra3-+ 52.Bc1 (52.Bg5 Ra5 53.Kb3 Rf5-+) 52...Ra8 (52...Ra5 53.Kb3 Rf5 54.Kc4-+) 53.Bb2 (53.Kb3 Ra5 54.f6 Rh5-+) 53...Rb8 54.Ba3 Rc8 (better 54...Rb5!? 55.Kb2-+) 55.Bb2 (55.Kb3 Rd8-+) 55...c5 (better 55...Kh7 56.Kb3 Rb8 57.Kc3 Rb2 58.Kb2-+) 56.Kd3 (56.Kb3 Re8 57.Kc4-+) 56...c4 57.Kd2 g6 58.Bc3 (58.fg6 fg6 59.Kc3 Kf7-+) 58...gf5 59.Bb2 (59.Ke2 Re8 60.Kf3 Re1-+) 59...f4 60.Kc3 (60.Bc3-+) 60…f3 0-1. SwamiChaturanga (2515) - universe64 (2500), lichess.org, 2021. (=1.Nf3 c6 2.b4 d5 3.a3 Bf5)

4.e3 e6 =.

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

4.d4 a5 5.b5 cb5 6.e3 Qb6 7.Qd3 Bd7 8.Nc3 b4 9.ab4 Qb4 10.Rb1 Qd6 11.Rb7 Qc6 12.Rb1 e6 13.Nb5 Ne4 14.Ba3 Ba3 15.Na3 0-0 16.Ne5 Qc7 17.f3 Nf6 18.Be2 Nc6 19.Nb5 Ne5=+ 20.Nc7 Nd3 21.Bd3 Ra7 22.Na6 a4 23.Ra1 Rfa8 24.Nc5 a3 25.Ra2 Kf8 26.Kd2 Ke7 27.Kc3 Kd6 28.Rha1 Bc6 29.Kb3 Rb8 30.Kc3 Rba8 31.Kb3 Rb8 ½–½. Kazimierski,Tomasz (1740) – Ashby,Stephen, IECC, 1999.

4.d4 a5 5.c3 Bf5 6.e3 e6 7.Bd3 Bd3 8.Qd3 ab4 0–1. Sergey Biryukov – pierre (2095), internet, 2012.

4.d4 Bf5 5.Nbd2 a5=+ 6.ba5 Qa5 7.Bb2 Nbd7 8.e3 Qa4 9.Bd3 Bd3 10.cd3 Qd1 11.Rd1 e6 12.0-0 Bd6 13.Ra1 0-0 14.e4 Nh5=+ 15.g3 Ra6 16.Rfc1 Rfa8 17.Rab1 Nb8 18.e5 Bf8 19.Kf1 b5–/+ 20.Ke2 h6 21.Nb3 Ba3 22.Ba3 Ra3 23.Rb2 Kf8 24.Ne1 g5 25.Nc2 Ra2 26.Rcb1 Ke7 27.Nb4 Rb2 28.Rb2 Ng7 29.h3 h5 30.Nc5 f6 31.g4 f5 32.f3 h4 33.Rb1 f4 34.Rc1 Ra7 35.Kd2 Kd8 36.Kc3 Kc7 37.Kb3 Kb6 38.Rc2 Ra1 39.Ra2 Ra2 40.Ka2 Kc7 41.Kb3 Kd8 42.Nb7 Ke7 43.Kb2 Ne8 44.Nc5 Nc7 45.Kc3 Kf7 46.Kb3 Ke8 47.Kb2 Kf8 48.Kc1 Ke7 49.Kc2 Na8 50.Kd1 Nb6 51.Nb7 Nc8 52.Nc5 Na7 53.Kd2 Nd7 54.Nb7 Nf8 55.Na5 Kd7 56.Nb3 Ng6 57.Nc5 Ke7 58.Kc3 Nf8 59.Nba6 Kd8 60.Kb4 Nc8 61.Nb7 Kd7 62.Kc5 b4 63.Kb4 Nb6 64.Nd6+/– Nh7 65.Ka5 Na8 66.Nc5 Ke7 67.Ka6 Nc7 68.Kb6 Nb5 69.Nb5 cb5 70.Kb5 Nf8 71.Kc6 Ng6 72.Nd7 Nh8 73.Nb6 Nf7 74.Kc7 Nh6 75.Nc8 Ke8 76.Kd6 Kd8 77.Nb6 Ng4 78.Ke6 Ne3 79.Kf6 g4 80.e6 Nf5 81.Kf5 gf3 82.Kf6 Ke8 83.Nc8 f2 84.Nd6 Kd8 85.e7 Kc7 1–0. Fritz 8 – Fritz 6, 2005.

4.d4 Bf5 5.Nbd2 a5=+ 6.ba5 Qa5 7.Bb2 Nbd7 8.e3 Qa4 9.Bd3 Bd3=+ 10.cd3 Qd1 11.Rd1 e6 12.0-0 Bd6 13.Ra1 0-0 14.e4 Nh5 15.g3 Ra6 16.Rfc1 Rfa8 17.Rc3 g6 18.Rb3 R8a7 19.Kg2 h6 20.Ne1 Be7 21.Nc2 Nhf6 22.Rc1 Ra4 23.Nb4 Ra8 (23...Nb8 24.h3=+) ½–½. Dardoura – Kern, corr 3GMM–57, 1997.

4.d4 Bf5 5.e3 e6 =.

4.d4 Bf5 5.Nh4 Bd7 =+.

4.d4 Bg4 5.e3 =.

4.e3 e6 5.d4 Be7 6.c4 0-0 7.Bb2 Nbd7 8.Nc3= a5 9.b5 dc4 10.Bc4 Nb6 11.Bd3 Bd7 12.bc6 Bc6 13.0-0 Rc8 14.Ne5+= Qd6 15.Rc1 Rfd8 16.Qd2 a4 17.Nc6 bc6 18.Qd1 Ra8 19.Qf3 Nbd5 20.Rc2 Nc3 21.Rc3 Nd5 22.Rc4+/– Rdb8 23.Rb1 Ra6 24.Qd1 Bf6 25.Ra4 Ra4 26.Qa4 h6 27.Qc2 e5 28.Bh7 Kh8 29.Be4 ed4 30.ed4 Nf4 31.Qc4 Bd4= 32.Bd4 Rb1 33.Bb1 Qd4 34.Qd4 Ne2 35.Kf1 Nd4 36.Bd3 Kg8+= 37.a4 Nb3 38.Ke2 Kf8 39.Ke3 Ke7 40.Bc4 Na5 41.Kd4 Nc4 42.Kc4 Kd6 43.a5 c5? 44.Kb5+– c4 45.Kc4 Kc6 46.h4 h5 47.f4 g6 48.Kb4 f5 49.g3 Kb7 50.Kb5 Ka7 51.a6 Kb8 52.Kb6 Ka8 53.a7 g5 54.hg5 h4 55.g6 hg3 56.g7 g2 57.g8Q 1–0. Crafty 19.01 – Fritz 5.32, 2005.

4.e3 Nd7 5.Bb2 e5 6.Be2 Bd6 7.0-0 Ngf6 8.h3 Bh5 9.d3 0-0 10.Nbd2 a5 11.ba5 Qa5 12.Nb3 Qc7 13.Nbd2 Rfe8 14.e4 Bc5 15.Kh2 Rad8 16.Qe1 Bb6 17.a4 Ba5 18.Qc1 Nc5 19.g4 Bg6 20.ed5? cd5 21.Kg1–/+ e4 22.de4 de4 23.Nd4 e3 24.Nc4 Nfe4 25.f4 Bd2 26.Qb1 Nc3?? 27.Bc3+/– Bc3 28.Nb5+– Qe7 29.Nc3 Qh4 30.Kg2 Ne4 31.Rf3?? Nc3–/+ 32.Qf1? Ne2 33.Qe2 Be4 34.Raf1 Rd4 35.Ne5?? Rd2 36.Qd2 ed2 37.Rd1 Rd8 38.Nd3 Bf3 39.Kf3 Qh3 40.Ke4 Qg2 41.Ke3 f5 42.g5 Qe4 43.Kd2 Qf4 44.Kc3 Qg5 45.Rb1 Qf6 46.Kd2 b6 47.Rb5 g5 48.Ke2 f4 49.Rb3 g4 50.Kf2 g3 51.Kf3 Re8 52.Nb4 Qg5 53.Rd3 g2 54.Rd1 g1Q 55.Rg1 (55.Rg1 Qg1 56.Kf4 Qd4 57.Kf3 Re3 58.Kg2 Qd2 59.Kf1 Re1#). atanas70 – wa65 (1915), kurnik, 2012.

4.Ne5 Bf5 5.d4 Nd7 6.Bf4 Ne5 7.Be5 b5 8.a4 f6 9.Bg3 e5 10.ab5 (Worse is10.de5 Bb4 11.c3 Ba5=+) 10...Bb4 11.c3 Bd6 12.bc6 Ne7 13.e3 Rb8 14.Qa4 Qc7 15.Bb5 Bc2 16.Qc2 Rb5 17.Qd3 Qb6 18.de5 fe5 19.Nd2 Nc6 20.0-0 Qc5 21.c4 dc4 22.Nc4 Be7 23.Rfc1 Qd5 24.Qd5 Rd5 25.Ra6 Kd7 26.Kf1 Re8 27.e4 +=. Fritz 5.32 – Fritz 6, Blitz:4', 2002.

4.Ba3 e5 5.e3 (worse is 5.Ne5 Qd4 (5...Bb4?! 6.e3=) 6.Nf7 Kf7–+) 5...e4 6.a5 Qc7 7.Nd4 Bd6 8.c4 Nf6 9.Nc3 dc4 10.Bc4 0-0 11.h3 Qe7 12.Qb3 Qe5 (12...b5 13.ab6 ab6 14.0-0+=) 13.f4 (13.d3!?=) 13...ef3–/+ 14.Nf3 Qg3 15.Kf1 Qg6 16.g4 (16.b5!? c5 17.d4=) 16...b5–/+ 17.ab6 ab6 18.b5 (18.Ke2!? Nh5 19.Kf2–/+) 18...Ne4–+ 19.Ne4 Qe4 20.Be2 Be6 21.Qc3 Ra3 22.Ra3 Ba3 23.Qa3 f5 24.g5 cb5 25.Qd6 Nd7 26.Kf2 f4 27.ef4 Rf4 28.d3 Qe5 29.Qe5 Ne5 30.Ke3 Rf3! 31.Bf3 Nf3 32.h4 b4 33.Rb1 Nh4 34.Rb4 Nf5 35.Ke4 b5! 36.Rb2 Kf7 37.Ke5 Bd7 38.Ra2 Ke7 39.Rh2 h6 40.gh6 Nh6 41.Kd5 Nf5 42.Ke5 Nd6 43.Rg2 Nf7 44.Kd5 g5 45.Re2 Kf6 46.Rf2 Kg6 47.Ra2 g4 48.Ra6 Kf5 49.Kd4 g3 50.Ke3 Ng5 51.Rd6 Be8 52.Rd5 Kg4 53.Rd4 Kh3 54.Rd5 Ne6 55.Re5 g2 56.Kf2 Kh2 57.Re1 Nf4 58.Kf3 g1Q (58...g1Q 59.Rg1 Bc6 (worse is 59...Kg1 60.Kf4 Kf2 61.Ke4–+) 60.Kf4 Kg1–+) 0–1. Kremenietsky,Anatoly M – Moisieev,Oleg L, Moscow–ch, 1972.

4.b5 cb5 5.ab5 Qb5 6.e4 Qd7 7.ed5 Qd5 8.Nc3 Qf5 9.Nb5= Qe6 10.Qe2+= Qc6?? 11.Ne5+– Qc2 12.Qc4 Qc4 13.Bc4 Nh6 14.Nc7 Kd8 15.Na8 f6 16.Nf3 a6 17.Nb6 Bg4 18.d4 Bf3 19.gf3 Nf5 20.Bf4 Nc6 21.d5 Ncd4 22.Kd1 g5 23.Bb8 Bg7 24.Bd3 Ke8 25.Rc1 Kf7 26.Bc7 Nh6 27.Bc4 Kg6 28.Re1 Nhf5 29.Bd3 Kf7 30.f4 g4 31.Rc4 Re8 32.Rb4 Rh8 33.Nd7 Rc8 34.Bb6 Rc3 35.Bb1 Ke8 36.d6! Nc2 37.Bc2 Nd6 38.Ba4 f5 (38...a5 39.Rb1 Kf7 40.Ba5 Rd3 41.Ke2+–) 1–0. Fritz 8 – Crafty 19.01, 2005.

4.b5 Bg4 5.Bb2 Bf3 6.ef3 Nf6 7.Bd3 e6 8.0-0 Bd6 9.Re1 Qc7 10.h3 0-0 11.Bf6 gf6 12.Nc3 Bh2= 13.Kh1 Be5 14.f4 Bf4 15.Qg4 Kh8 Black gets in control 16.bc6 bc6 17.Ne2 Be5 18.Rab1 f5 19.Qh5 Nd7 20.c3 Nf6–/+ 21.Qh4 Ne4 22.Be4 de4 23.f3 ef3 24.gf3 Rfb8 25.d4 Bg7 26.Qf4 Qf4 27.Nf4 Bh6 28.Ne2 Rb6 29.Kg2 Rab8 30.Rb6 Rb6 31.Kf2 Rb2–+ 32.Ra1 Bd2 33.Kf1 a5 34.h4 Kg7 35.c4 Kh6 36.Rd1 Kh5 37.Kf2 f4 38.Kg2 Be3 39.Kf1 Rd2 40.Rd2 Bd2 41.Kg2 Kh4 42.Kh2 h6 43.Kg2 h5 44.Kh2 Be3 45.Kg2 Kg5 46.Kh2 f5 47.Kh3 h4 48.c5 Kh5 49.Kg2 Kg6 50.Kh2 Kf6 51.Kh3 e5 52.de5 Ke5 53.Kh4 Bc5 54.Nc1 Kf6 55.Nd3 Bd6 56.Nb2 Bb4 57.Nc4 Be1 58.Kh3 Ke6 59.Kg2 Kd5 60.Nb6 Kc5 61.Nd7 Kb4 62.Kf1 Bd2 63.Ke2 Be3 64.Ne5 Ka4 65.Nc6 Kb5 66.Ne5 a4 67.Kd3 a3 68.Kc2 Bd4 69.Nc6 Kc6 70.Kb3 0–1. Fritz 8 – Fritz 5.32, 2005.

4.b5 Bg4 5.Nc3 d4 6.Ne4 cb5 7.e3 ba4 8.ed4 Qc6 9.Nc3 Bf3 10.gf3 Qe6 11.Qe2 Qe2 12.Be2 e6 13.0-0 Nc6–/+ 14.Bb5 0-0-0 15.Bc6 bc6 16.Ra4 Rd7 17.Bb2 Rb7 18.Rb1 Nf6–/+ 19.Ne4 Be7 20.Ra6 Kd7=+ 21.Ra2 Rhb8–+ 22.d3 Nd5 23.c3 f5 24.Nd2 Bg5 25.Nf1 Nc3! 26.Bc3 Rb1 27.Ra7 Kd6 28.Rg7 Bh6 29.Rg3 Rc1 30.Ba5 Rbb1 31.Kg2 Rf1 32.Bb4 Kd5 33.Bc5 Bf4 34.Ba7 0–1. EXchess 3.11 – Fritz 6, 2005.

4.b5 Bg4 5.d4 cb5 6.Ne5 Bf5 7.ab5 Nd7 =+ (7...Qb5? 8.e4 Qb6 9.ef5+–).

4.b5 Bg4 5.Ne5? Qd4–+ 6.Ng4 Qa1 7.Ba3 Qd4 8.e3 Qa4 9.c4 Qd1 10.Kd1 Nf6 11.Nf6 ef6 12.Bf8 Rf8 13.cd5 cd5 14.Nc3 d4 15.Nd5 Kd8 16.Be2 de3 17.de3 Nd7 18.Bd3 Rc8 19.Bh7? g6 20.h3 Rc5 21.Nf4 Ne5 22.g3 Rb5 23.Kc2 Rc5 24.Kb3 a5 25.Rd1 Kc8 26.Rd5 Rd5 27.Nd5 f5 28.Ne7 Kd7 29.Nd5 Kd6 30.Nb6 Kc5 31.Na4 Kc6 32.h4 b5 33.Nc3 a4 34.Ka3 Rb8 35.Ne2 Rd8 36.h5 Rd3 37.Nc3 Rc3 (38.Ka2 Rc2 39.Kb1 Rf2–+). Fritz 5.32 – EXchess 3.11, 2005.

4.b5 Bf3 5.ef3 Nf6 6.Bb2 e6 7.Be2 Bd6 8.0-0 0-0 9.Re1 a6 10.g3 Qc7 11.h3 ab5 12.ab5 Ra1 13.Ba1 cb5 14.Nc3 b4 15.Nb5 Qc6 16.Bf6 gf6 17.f4 e5 18.Bf1 ef4?? 19.Qg4+– Kh8 20.Bd3 Rg8 21.Qh4 Rg6 22.Bg6 fg6 23.Qf6 Kg8 24.Nd6 Qd7 25.Re8 Qe8 26.Ne8 fg3 27.Qg7 1–0. Fritz 8 – Crafty 19.01, 2005.

4.b5 Bf3 5.ef3 Nf6 6.Nc3 e5 7.Ba3 Ba3–/+ 8.Ra3 0-0 9.Qb1 Qd6 10.Rb3 Nbd7 11.bc6 bc6 12.Bd3 Nc5–+ 13.Rb2 Nd3 14.cd3 Rab8 15.Rb7 d4 16.Ne4?? Ne4 17.de4 Rb7 18.Qb7 Rb8 19.Qa7 Rb1 20.Ke2 0–1. Comet B25 – Fritz 8, 2005.

4.b5 Bf3 5.ef3 Nf6 6.Nc3 e5 7.bc6 Nc6 8.Bb5 Bb4 9.Bb2 0-0 10.Bc6 bc6 11.0-0 Rb8 12.Rb1 Qa5 13.Qe2 d4 14.Ne4 Ne4 15.Qe4 Bd2 16.Ba3 Rfd8 17.Be7 Re8 18.Rb8 Rb8 19.Qc6 Qb6 20.Qd5=+ Bf4 21.g3= Bd2 22.Qe5 Rc8 23.Qe4 Bc3 24.Qg4 Qe6=+ 25.Rb1 f5 26.Qg5 h6 27.Qh4 Qe2 28.Rb7?? d3–+ 29.Bg5 hg5 30.Qh5 Rf8 31.cd3 Bd4 32.Rb1 Bf2 33.Kh1 g4 34.Qf5 Rf5 35.h4 Qf3 36.Kh2 Qg3 37.Kh1 Qh3 0–1. Comet B50 – Fritz 6, 2005.

4.b5 Bf3 5.ef3 Nf6 6.Nc3 e5 7.Be2 Bc5 =+.

4.e3 e6 5.Rb1 Nd7 6.Be2 Bd6 7.0-0 Ngf6 8.Nh4 Bg6 9.f4 Ne4 10.Ng6 Nc3 11.dc3 hg6 12.c4 g5 13.c5 Bc7 14.Rb3 Qf6 15.c4 Qh6 16.h3= gf4 17.ef4 f5 18.cd5+= cd5 19.Bb5 0-0-0 20.Qe2 Qg6 21.c6 bc6 22.Bc6 Nb8 23.Ba8 Rd6 24.Qc2 Kd7+= 25.b5 Rc8 26.Be3 d4 27.Bf2 Bb6 28.Qd2 Qf6 29.Rd3 Rc3 30.Rd1 Rd3 31.Qd3 Ke8 32.Be1 Kf7 33.a4 g5 34.a5+– Bc7 35.b6 ab6+= 36.fg5 Qg5 37.a6 Nd7 38.a7 Nc5? 39.Bd2 Qg8 40.Qf3 1–0. gtate (2450) – iozeph (2465), net–chess.com, 2007.

4.e3 Nf6 5.Rb1 a6 6.Nd4 Bg6 7.f4 e6 8.Be2 Nbd7 9.0-0 Qc7 10.Qe1 c5 11.bc5 Bc5 12.Nb3 Bc2–/+ 13.Rb2 Bb3 14.Rb3 0-0 15.d4 Ba7 16.Ba3 Rfc8 17.g4 b5 18.g5 Ne8 19.f5=+ Qd8 20.fe6 Qg5 21.Qg3 Qg3 22.hg3 fe6 23.Bg4 Rc6 24.Nd5!+/– ed5 25.Bd7 Rf6 26.Rbb1?? Rf1 27.Rf1+/– Nf6 (27...Nf6 28.Be6 Kh8+/–). gtate (2520) – iozeph (2320), net–chess.com, 2007.

4.ba5 Qa5 5.Bd2 Qc7 6.e3 Nf6 7.c4 Bf5 8.Nc3 e6 9.Be2 (9.Nh4 Bg6=) 9...Bd6 (9...dc4 10.Bc4 b5 11.Be2=) 10.0-0 (10.c5 Be7+=) 10...0-0 (better 10...dc4!? 11.Bc4 0-0=+) 11.c5+= Be7 12.Qb3 (12.Nh4!?+=) 12...Nbd7= 13.h3 h6 14.a4 Ne4 15.Ne4 Be4 16.Bc3 Rfb8 17.a5 Re8 18.Rfd1 g5 (18...e5 19.Qb4=) 19.Bd3 Bf3 20.gf3 e5 21.Bb4 (21.Rab1 Ra7 22.de5 Ne5 23.Qb6 Qb6 24.cb6 (24.Rb6? Bc5 25.Be5 Re5-+) 24...Nf3 25.Kf1+=) 21...ed4=+ 22.ed4 Bf6 23.Bc2 (23.Bc3 Nf8=+) 23...Nf8-/+ 24.Qd3 Ng6 (24...Ne6 25.Bc3-/+) 25.Bd2=+ Kf8 26.Rdb1 Nf4 27.Bf4 Qf4 (worse 27...gf4 28.Rb6=) 28.Rb7?? (better 28.Ra4=+) 28...Bd4-+ (28...Qd4?! 29.Ra2-/+) 29.Ra4 (29.Rab1 Qg3 30.Kh1 Qh3 31.Kg1 Qg3 32.Kh1 Qh4 33.Kg2 Qf2 34.Kh1 Re1 35.Re1 Qe1 36.Kg2-+) 29…Qg3 (29...Qg3 30.Kh1 Re1 31.Qf1 Rf1) 0-1. nizef (1835) - rona81 (2005), gameknot.com, 2015.

4.c3 ab4 5.cb4 Bf5 6.Bb2 e5 (6...e6 7.b5=+) 7.a3 (7.Ne5!? Bb4 8.Nc3=+) 7...e4–/+ 8.Ng1 (8.Nfd2 e3 9.fe3 Bd6=+) 8...e3 9.fe3 Bd6 10.Nd2?? (better is 10.Nf3–/+) 10...Qh4 (11.g3 Bg3 12.hg3 Qg3) 0–1. salmo (1920) – Mario Cruz (1915), internet, 2005.

5.Bd2 Ra7 =.

5.e3 e6 6.Bd2 Ra8 7.Bd3 =.

6.c4 e6 7.Bd3 =.

6.Bd2 Ra8 7.c4 e6 (7...Bg4 8.Bd3=) 8.Nc3 (8.c5 Be7=) 8...Be7 9.Bd3 0-0 (9...dc4 10.Bc4 0-0 11.Qc2=) 10.0-0 (10.c5 b6 11.cb6 Qb6=) 10...Nbd7 (10...dc4 11.Bc4 Nbd7 12.Qc2=) 11.cd5 (11.c5 b6 12.cb6 Nb6+=) 11...ed5= 12.Qc2 b6 13.e4 de4 (13...Ba6 14.Ba6 Ra6 15.Rfe1=) 14.Ne4 Qc7 15.Bg5 (15.Nf6 Nf6 16.Ne5 Bd7+=) 15...Ba6= 16.Ba6 Ra6 17.Bf6 Nf6 18.Rfc1 Rc8 (18...Rd8 19.Nf6 Bf6 20.Qc6 Qc6 21.Rc6+/–) 19.a4 (19.Ne5 Ne4 20.Qe4 c5=) 19...Ne4 (19...Qf4 20.Re1=+) 20.Qe4= Bf6 21.Ra2 b5 22.d5 c5 23.Rac2 Ra4 24.Rc5 Re4 25.Rc7= Rc7 26.Rc7 Rc4 27.Rc4 bc4= 28.Kf1 Kf8 29.Ke2 Ke7 30.Nd2 c3=+ 31.Ne4 Be5 32.Kd3 f5 33.Nc3 Bh2 34.Ne2 ½–½. Janvari,Viktor – Szonyi,Bence, Budapest Papp Bela mem, 1995.

8.c5 e6 =.

8.Nh4 Bg4 9.Qb3 e6 =.

8.Nh4 Bg4 9.Nf3 dc4 10.Bc4 e6 =.

4.de5 Bb4 5.Bd2 Qe7 6.c4 Be6 7.Qb3 Na6 8.e3 Nh6 9.Be2 0-0 10.0-0 Rad8 11.a3 dc4 12.Bb4 cb3 13.Be7 b2 14.Nc3 ba1Q 15.Ra1 Nc7 16.Ne4 Nf5 17.Bd8 Rd8 18.Rc1 h6 19.Kf1 Kf8 20.g4 Ne7 21.Nd4 Bd5 22.Nd6 b6 23.Rd1 g5 24.Bf3 c5 25.Bd5 Ncd5 26.Nf3 Rd7 27.Ke1 a6 28.h4 gh4 29.Nh4 b5 30.Ne4+= c4 31.Nf5 Nf5 32.Nc5 Rc7 33.Rd5 Nh4 34.e6 Ke7 35.ef7 Rc6 36.Nd7 Ng6 37.f4 Kf7 38.f5 Ne7 39.Rd4 Ke8 40.Kd2 h5 41.f6 hg4 42.f7 Kf7 43.Ne5 Ke6 44.Nc6 Nc6 45.Rg4 a5 46.Rg6 Kd7 47.Rg5 b4 48.ab4 ab4= 49.Rc5 c3 50.Kc2 ½–½. Taulien,H – Serfling,R, remoteschach.de, 2003.

4.Ne5 Bb4 5.c3 Bd6 6.Nf3 (6.Ba3 Ba3 7.Na3 Nf6=) 6...Nf6=+ 7.Bg5 (7.Ba3 Ba3 8.Na3 0-0=+) 7...0-0 8.e3 Bg4 (8...h6 9.Bh4=+) 9.Be2 (9.Qb3 b6=+) 9...Nbd7 10.Nbd2 (10.0-0 h6 11.Bf6 Qf6=+ (< 11...gf6 12.Nbd2+=)) 10...Qa5 11.Qc2 (11.Rb1 Ne4 12.Rb7 Nc3–/+) 11...Ne4–/+ 12.Ne4? (better is 12.Rc1!?–/+) 12...de4–+ 13.Ng1? Qg5 14.Qe4 Nf6 15.Qc2 Bf5 16.h4 Qg2 17.Qf5 Qh1 18.0-0-0 Qh4 19.Nf3 Qf2 20.Bd3 Ba3 (21.Kb1 Qb2) 0–1. Nittschalk,Karl – Zulauff,Harri, TT–18.37 ETC, 2005.

4.Ne5 Bb4 5.Bd2 =+.

4.a3 a5 5.ba5 Ra5 6.c4 e6 7.Qc2 Nf6 8.Bb2 Nbd7 9.Nc3 Bd6 10.d4 Qa7 11.c5 Bc7 12.Be2 0-0 13.Nd2 Qb8 14.f4 b6 15.cb6 Qb6 16.0-0 c5 17.Nb3 Ra8 18.Ra2 Rb8 19.Nc5 Nc5 20.dc5 Qc5 21.Bc1 Ba5 22.Na4 Qc2 23.Rc2 Bd7 24.Nc5 Rfc8 25.Ba6 Bb5 26.Bc8 Rc8 27.Rff2 Be1 28.Rfd2 Bd2 29.Bd2 Bc4 30.Bb4 Ng4 31.Rc3 h6 32.h3 Nf6 33.g4 g5 34.fg5 hg5 35.Kg2 Kh7 36.Rc2 Kg6 37.Nd3 Nd7 38.Ne1 e5 39.Rd2 Nb6 40.Nf3 f6 41.Kg3 Kf7 42.h4 gh4 43.Nh4 Ke6 44.Nf5 Rg8 45.Rh2 (45.Rc2!?=) 45...Bd3+= 46.Rh7?? (better is 46.Nd6+=) 46...Rg4!!–+ 47.Kf3 Kf5 0–1. Sopko,Cassio Roberto – Carlstedt,Jonathan (2385), Copenhagen DEN, Politiken Cup, 2013. (=1.Nf3 d5 2.b4 c6 3.e3 Qb6)

4.a3 a5 5.ba5 Ra5 6.c4 Bf5 7.Nc3 Nf6 8.Nd4 Bg6 9.Nb3 Ra8 10.c5 Qc7 11.f4 Nbd7 12.Be2 e5 13.0-0 ef4 (worse is 13...Bc5 14.f5+=) 14.ef4 d4 15.f5 dc3 16.d4 Nd5 17.fg6 hg6 18.h3 N7f6 19.Bg4 Be7 20.a4 0-0 21.a5 Rfe8 22.Bf3 Bf8 23.Bg5 Ne4 24.Be4 Re4 25.Qf3 Rae8 26.a6 ba6 27.Ra6 f6 28.Bc1 Qb7 29.Ra3 Qb4 30.Qd1? Ne3–+ 31.Be3 Re3 32.Ra7 c2! 33.Qc2 Qb3 34.Qg6 Re1 35.Re1 Re1 36.Kh2 Qb8 37.Qg3 Rh1! (37...Rh1 38.Kh1 Qg3–+; 37...Qa7?! 38.Qe1 Qd7 39.Qe3–+) 0–1. Alonso Arburu,JI (2300) – Fontana Sotomayour,LJ, Aragon–ch, 1992.

4.b5 Nf6 5.a4 Bg4 6.a5 Qc7 7.c4 cb5 8.cd5 a6 9.Nc3 Nbd7 10.Bb2 b4 11.Ne2 Nd5 12.e4 N5f6 13.Ng3 e6 14.d4 Be7 15.Bd3 Nh5 16.0-0 0-0 17.e5 Ng3 18.hg3 Rfd8 19.Qb1 Nf8 20.Rc1 Qd7 21.Nd2 Rac8 22.Nc4 Qe8 23.Be4 Qb5 24.Nb6 Rc1 25.Qc1 Nd7 26.Nc8 Bf8 27.Na7?? (better is 27.Qc7 Re8 28.Bb7+/–) 27...Qe2–+ 28.Bb7 Ne5! 29.de5 Rd2 30.Qf1 Rb2 31.Ba6 Qe5 32.Nc6 Qd6 (better is 32...Qc3!? 33.Qc4 Qf6–+) 33.Bb5 Rc2 34.a6 Rc6 35.Bc6 Qc6 36.a7 Qa8 37.Qb5 Bf5 38.Qb8 Be4 39.Rc1 Qd5 (39...Bg2?? 40.Rc8 h6 41.Rf8 Kh7 42.Qa8 Ba8 43.Ra8+–) 40.f3 Qd4 41.Kh2 Qd2 42.Qf4 Qf4 43.gf4 Bd5 44.Rd1 Bc6 45.Rd8 g6 46.a8Q (better is 46.Rc8!? Bd5 47.Rd8=) 46...Ba8–/+ 47.Ra8 Kg7 48.g3 Bd6 49.Rd8 Bc5 50.Rd7 Kf6 51.Rb7 h6 52.Kh3 Bd6 53.Rb5 Be7 54.Kg2 Bd6 55.Kf2 h5 56.Ke3 e5 57.fe5 Be5 58.g4 hg4 59.fg4 Bc3 60.Ke4 Ke6 61.Rb6 Ke7 62.Kd5 Bd2 63.Ke5 Bc3 64.Ke4 f5 65.Kd5 (65.gf5 gf5 66.Kf5 Kd7=) 65...fg4 (65...Kf7 66.g5 Bd2 67.Rb7 Kg8 68.Rb8 Kg7 69.Rb7 Kf8+=) 66.Rg6= b3 67.Rg4 b2 68.Rg1 Bd2 69.Rg7 Kf6 70.Rb7 Bc1 71.Ke4 Ke6 72.Rb6 Kd7 73.Kd5 Ke7 ½–½. Ivanets,Vladimir (2265) – Mkrtchian,Lilit (2170), Moscow IM1, 1996. (=1.Nf3 d5 2.b4 c6 3.e3 Qb6)

4.c3 Nf6=+ 5.a4 (5.Be2 Nbd7=+) 5...a5 (5...Nbd7 6.a5 Qc7 7.c4=+) 6.Ba3 (6.b5 Bf5=+) 6...ab4 (6...Nbd7 7.d4=+) 7.cb4= e6 (7...Nbd7 8.Nc3=) 8.a5 Qc7 9.Be2 (9.Nc3 Bd6=) 9...Bd6 10.0-0 (10.Nc3 0-0=) 10...0-0 (10...e5 11.Nc3=) 11.d4 (11.Nc3 e5=) 11...Nbd7 (11...Ne4 12.Qb3=) 12.Nc3= e5 13.de5 (13.h3!?=) 13...Ne5=+ 14.h3 (14.b5 Nf3 15.Bf3 Ba3 16.Ra3 Ra5 17.Ra5 Qa5–/+) 14...Nf3 (14...Qe7 15.Nd4–/+) 15.Bf3 Qe7 (15...Be6 16.Re1–/+) 16.Qd4 (16.Qb3 Qe5 17.Rfd1 d4 18.Rd4 Qh2 19.Kf1 Be6–+) 16...Bf5–/+ 17.Rfc1 Ne4 (17...h6 18.Ra2–/+) 18.Be4 (18.Ne4 de4 19.Bb2 f6=) 18...Be4 (18...de4 19.Bb2 Rfd8 20.Qc4–/+) 19.Ra2 (19.Bb2 Qe5 20.Ne4 Qd4 21.Bd4 de4+=) 19...Rfe8 (19...Bf5!?–/+) 20.Ne4= de4 (20...Qe4 21.Qb6 Qe7 22.Bb2=+) 21.Bb2 f5 (21...f6 22.Qc4 Qf7 23.Raa1=) 22.Qc4 (22.a6 Red8 (worse 22...Ra6 23.Ra6 ba6 24.Rc6+–) 23.Qb6 Bb4=) 22...Qf7 (22...Qe6 23.a6=) 23.Qf7 (23.a6 Red8=) 23...Kf7 24.Ba3 (24.Bc3 Red8=) 24...Re5=+ 25.Rd2 Be7 (25...Ke6 26.Rc4=+) 26.Rcd1 b6 (26...Ke6 27.Rd7 Rb5 28.Rc7=+) 27.Bb2= Rb5 28.ab6 (28.Bc3 Bb4 29.Bb4 Rb4 30.Rd7 Kf6 31.R1d6 Ke5 32.Rc6 Rb1 33.Kh2 ba5 34.Rc5 Kf6 35.Rc6 Ke5 36.Rc5 Kf6 37.Rc6 Ke5=) 28...Rb4=+ 29.Bc3 (29.Be5 Rb6 30.Rd7 Ke6 31.Bg7 c5=+) 29...Rb6 30.Rd7 Rc8 (30...g6 31.Rc7 Ke6 32.Bd4=+) 31.Bg7= c5 (31...Ke6 32.Bc3=) 32.Bc3 (32.Ra7 Ke6=) 32...Rb3 33.Ba5 (33.Rc1 Ke6 34.Ra7 Rd8=) 33...Rbb8 (33...Ra8 34.Rc7=+) 34.Bc7 (34.R1d6!?=) 34...Rb7=+ 35.Bd8?? (better 35.Be5 Rd7 36.Rd7=+) 35...Rd7–+ 36.Rd7 Rd8 (36...Rd8 37.Rd8 Bd8–+) 0–1. Martin Fernandez,A (1765) – Suarez Buceta,M (1725), 1nd Fuerteventura Spain, Open, 2016.

4.a3 e5 =.

4.b5 Nf6 5.Ba3 Qc7 6.c4 e5 7.Bf8 Kf8 8.Nc3 Bg4 9.bc6 bc6 10.cd5 cd5 11.Rc1 Nc6 12.Bb5 Bf3 13.Qf3 Ne7 14.0-0 e4 15.Qd1 Qd6 16.Be2 g6 17.d3 Qe5 18.Nb5 Kg7 19.d4 Qg5 20.Qa4 a5 21.Nc7 Ra7 22.Qb5 Nc8 23.Rc2 Rd8 24.Rfc1 a4 25.Qb4 Nd7 26.Bb5 Ncb6 27.Bd7 Nd7 28.Qb5 h5 29.h3 h4 30.Nd5 Nf6 31.Qb6 (31...Rda8 32.Nf6 Qf6 33.Rc6+–) 1–0. Hemzo,Miguel Angelo – Luehrig,Walter, Orang Utan Invitational, 2002.

4.c3 e5 5.d3 =+.

4.c3 Bg4 5.d4 Nd7 6.Be2 Ngf6 7.Nbd2 e6 8.Bb2 Be7=+ 9.Qc2 0-0 10.0-0 Rfc8 11.Rae1 a5 12.a3 b6 13.Bd3 ab4 14.ab4 c5 15.bc5 bc5 16.Ng5 h6–/+ 17.Ngf3 c4–+ 18.Be2 Bf5 19.Qc1 Ra2 20.Nb1? Rb8 21.Ba3 Ra3 22.Na3 Qa3 23.Nd2 Qa2 24.Nf3 Rb2 25.Nh4 Re2 26.Nf5 ef5 27.Re2 Qe2 28.Qa1 Nf8 29.Rb1 Ne4 30.Rb2 Qd3 (31.g3 Qc3–+) 0–1. Deregowski,Richard – Stoppel, Recklinghausen op, 1994.

4.Bb2 f6 5.c4 e5 6.cd5 cd5 7.Qb3 Nb6 8.a4 e4 9.Nd4 a6 (9...Ne7 10.a5 Nc4 11.Bc4 dc4 12.Qc4+=) 10.a5 Nc4 11.Bc4 dc4 12.Qc4 Qe7 13.Ba3 (13.Nc3 Qb4 14.Qb4 Bb4 15.Ne4 Nh6+–) 13...Qf7 14.Qc2 f5 15.Nc3 Be6 (15...Bd6 16.d3 Qg6 17.0-0+/–) 16.Ne6 (better is 16.Ne4!? Qg6 17.Ne6 Qe6 18.Nc5 Bc5 19.bc5+–) 16...Qe6+/– 17.Qa4 Qd7 18.Qd7 Kd7 19.Nd5 Ne7?? (better is 19...Rd8+/–) 20.Nb6+– Ke6 21.Na8 g6 22.Nb6 Bg7 23.Rc1 Nd5 24.Nd5 Kd5 25.Rc7 (25.Rc7 Bf6 26.Rb7+–) 1–0. Hummel,Thomas (1730) – Steindl,Horst, Forchheim GER, 2011.

4.c4 e6 5.cd5 ed5 6.b5 Ngf6 7.bc6 bc6 8.d4 Bd6 9.Nc3 0-0 10.Bd3 Re8 11.0-0 Nf8 12.Bd2 Bg4 13.Bf5?? (better is 13.h3 Bh5 14.Rb1=) 13...Bf5–+ 14.Ng5 h6 15.Qh5 (15.Nf3–+) 15...Nh5 16.Nd5 Qg5 17.Nc7 Bc7 (better is 17...Bh3 18.g3 Bc7 19.f4–+) 18.a4 Bh3 19.Rae1 (19.g3 Ng3! 20.hg3 Bg3 21.Kh1 Bd6 22.Rg1 Qd5 23.e4 Qe4 24.f3 Qf3 25.Rg2 Qg2) 0–1. anglewolf – whitecat25, ChessWorld.net, 2011.

4.d4 e5 5.c3 e4 6.Ne5 (6.Nfd2!?+=) 6...Ne5–/+ 7.de5 Qc7 8.Qd4 f6 9.ef6 Nf6 10.h3 Be7 11.a4 0-0 12.a5 Bf5 13.g4 Bg6 14.Nd2? (better is 14.Bb2–/+) 14...Ng4!–+ 15.hg4 Bf6 16.Qc5 b6 17.ab6 ab6 18.Qf8 Rf8 19.Bb2 c5 (19...Qf7!? 20.Be2–+) 20.bc5 bc5 21.Nb3 (21.Be2–+) 21...Rb8 22.Nc5 (22.g5 Rb3 23.gf6 Rb2 24.fg7–+) 22...Rb2 23.Na4 (23.Be2 Qc5 24.Kf1 Re2 25.Ra8 Kf7 26.Ke2 Qb5 27.Kd2 Qb2 28.Ke1 Qc1 29.Ke2 Qh1 30.Ra7 Kf8 31.Ra8 Be8 32.Kd2–+) 23...Bc3 24.Kd1 Rd2 25.Kc1 Bb4 26.Kb1 Qc2 0–1. themuttsknutts – whitecat25, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 c6 3.e3 Nd7)

5.f4 Nf6 6.Be2 0-0 7.0-0 d4 8.c3 dc3 9.Nc3 Bc3 10.dc3 Be6 11.Qc2 Nd5 12.c4 Nc7 13.f5 Bc8 14.Bb2 f6 15.Ng4 Nd7 16.Rf4 Qe7 17.Raf1 Na6 18.Re4 Qd8 19.Rd1 Nac5 20.Red4 Qe7 21.e4 Re8 22.Bf3 b6 23.Rd6 Bb7 (23...Ne4?? 24.Re6 Ng5 25.Re7 Nf3 26.gf3 Re7 27.Qg2+–) 24.e5 (better is 24.Qd2!?+/–) 24...fe5= 25.f6 Nf6 (25...gf6 26.Rd7 Nd7 27.Rd7 Qc5 28.Kh1+–) 26.Ne5 Rad8 27.Rd8 Rd8 28.Rd8 Qd8 29.Nc6 Qe8 30.Ne5 Bf3 31.gf3 Qh5 32.Qd2 h6 33.Qf4 Ne6 34.Qd2 Qf5 35.Qd1 Nh5 36.Bc3 Nhf4 37.Ng4? Qc5–+ (37...Qc5 38.Kh1 h5–+) 0–1. Wiezer,Siegfried (2040) – Brener,Ilja (2420), Berlin Unicorn op, 2008.

6.Be2 Bf5 7.0-0 0-0 8.f4 Bd6 9.c4 dc4 10.Bc4 Bb1 (10...Nbd7!?=) 11.Rb1+= b5 12.Bb3 Qb6? (12...a5 13.a4+/–) 13.Qf3 (13.Nf7 Rf7 14.Bf6 gf6 15.Qg4 Kf8 16.Qc8 Kg7 17.Bf7 Kf7+/–) 13...a5 14.a4 (14.Nf7!? a4 15.Nd6 ab3 16.ab3 Na6+–) 14...Ra7 15.d4 Re7 16.Kh1 Kh8 17.Ba1 Nfd7 18.Rfc1 c5 (18...Ba3!? 19.Nc6 Re3 20.Qe3 Bc1 21.Rc1 Nc6 22.ab5 Qb5 23.Bf7 Nb4+/–) 19.ab5 cd4 (19...Be5 20.de5 Rd8 21.e4+–) 20.Nc6 (better is 20.Nc4!? Qc7 21.Bd4+–) 20...Re3+/– 21.Bd4?? (21.Qd5 Bf4 22.Bd4+/– (22.Nd4? Re5 23.Qa8 Bc1 24.Rc1 Nc5–+; worse is 22.Qd4 Qd4 23.Nd4 Rb3 24.Nb3 Bc1–/+)) 21...Rf3–/+ 22.Bb6 Rb3 23.Rb3 Nb6 24.Nb8 Bb8 25.Ra3 a4 26.Rc6 Rd8 27.Kg1? Rd6 28.g3 g6–/+ 29.Kf2 Kg7 30.h4? Rc6 31.bc6–/+ h5 32.Re3 Kf6 33.Re8 Bc7 34.Re3 Bd6 35.Rd3 Ke7 36.Re3? Kd8 37.Kf3 Kc7 38.g4 Bf4! 39.Re7 Kd6 40.Rf7 Be5 41.gh5 gh5 42.Ke4 Bg3 43.Rh7 Bh4 44.Rh5 Bd8 45.Rh6 Kc5 46.Kd3 Bc7 47.Kc2 Bd6 48.Kb2 Kc6 0–1. whitecat25 – biohuman, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 c6 3.e3 e5 4.Ne5 Bb4 5.Bb2 Nf6)

7.0-0 Nbd7 8.Nf3 Bd6 9.d3 Nc5 10.a3 Re8 11.Bd4 Bf5 12.Nbd2 b5 13.c4 dc4 =+.

7.0-0 Nbd7 8.Nf3 Bd6 9.d3 Nc5 10.Ba3 Bg4 11.d4 Nce4 12.Bd6 Qd6 13.Ne5 Be2 =+.

7.0-0 Nbd7 8.Nf3 Bd6 9.d3 Nc5 10.a4 Bg4 11.Nbd2 Qe7 12.Ba3 Rfe8 13.c4 Bf3 =+.

7.0-0 Nbd7 8.Nf3 Bd6 9.d3 Nc5 10.Nc3 Re8 11.a4 Be6 12.Rb1 Qa5 13.Qd2 b6 =+.

7.0-0 Nbd7 8.Nf3 Bd6 9.d3 Nc5 10.Qd2 Qe7 11.Nc3 Bg4 12.Nd4 Ne6 13.Ne6 Be6 =+.

7.0-0 Nbd7 8.Nf3 Bd6 9.d3 Nc5 10.Nbd2 Na4 11.Rb1 Nb2 12.Rb2 Qe7 13.c4 Bf5 =.

7.0-0 Nbd7 8.Nf3 Bd6 9.d3 Nc5 10.d4 Nce4 11.c4 dc4 12.Bc4 Re8 13.Ba3 Be6 =.

7.0-0 Nbd7 8.Nf3 Bd6 9.d3 Nc5 10.Bd4 Bf5 11.Nbd2 Re8 12.Nh4 Bd7 13.Rb1 b5 14.c4 Qe7 15.cb5= cb5 16.Nhf3 a6=+ 17.Nb3 Na4 18.Rc1 h6 19.Qe1 Bb4 20.Qd1 Qd6 21.Rc2 Rac8=+ 22.Rc8 Rc8 23.Ne5 Bf5 24.f4 Nc3 25.Qc2 a5 26.Bf3 a4 27.Na1 Nd7 28.Qb2 Ba5 29.g4 Ne5 30.gf5 Nf3 31.Rf3 f6 32.Rg3 Qe7 33.Kh1 b4 34.Rg1 Kh8 35.Qg2 Rb8 36.Bc5 Qf7 37.Bd4 b3 38.ab3 ab3 39.Qb2 Na4 40.Qa3 b2 41.Nb3 Qh5 42.Bb2 Qf3 43.Rg2 Nb2 44.Qb2 Qd1 (44...Qd1 45.Rg1 A) < 45...Rb3 46.Qg2 (46.Rd1?? Rb2 47.e4 de4 48.de4 Bc7–+) 46...Qg1 47.Qg1+/–; B) 45...Qb3–+) 0–1. Walker,John T (1965) – Luzuriaga,Norberto Horacio (2375), corr ICCF WSTT/3/06/4, 2006.

7.0-0 Nbd7 8.Nf3 Bd6 9.d3 Nc5 10.Re1 Re8 11.a4 Bg4 12.Nc3 Rb8 13.h3 Be6 =+.

7.0-0 Nbd7 8.Nf3 Bd6 9.d3 Nc5 10.Be5 Bg4 11.Nbd2 Na4 12.Qe1 Re8 13.Bd6 Qd6 =+.

4.Bb2 e6 =.

4.d4 e6 5.a3 Nf6 6.Be2 Nbd7 7.Nbd2 a5 8.ba5 Qa5 9.0-0 b5 10.Bb2 Qc7 11.Bd3 Nb6 12.Ne5 Na4 13.Bc1 Bd6 14.f4 0-0 15.Nb3 Ra7 16.Bd2 Ne4 17.Be4 Be4 (17...de4 18.g4 Bg6 19.f5 ef5 20.gf5 Be5 21.de5 Qe5 22.fg6 Qg5 23.Kh1 Qg6 24.Rg1+/–) 18.Nd3 c5 19.dc5 Nc5 (worse is 19...Bc5 20.Nbc5 Nc5 21.Bb4+=) 20.Bb4 Nb3 21.cb3 Bb4 22.Nb4 Qc3 23.Qd4 Qd4 24.ed4 Rfa8 25.Rfc1 h5 (25...Ra3?? 26.Ra3 Rf8 27.Rc5+–) 26.Rc5 Ra3 27.Ra3 Ra3 28.Rb5 Rb3 29.Rb8 Kh7 30.Nc6 Rc3 31.Nd8 Rc1 32.Kf2 Rc2 33.Ke3 Kg6 (33...Rg2?! 34.Nf7 Rh2 35.Rh8 Kg6 36.Ne5 Kf6 37.Ng4 hg4 38.Rh2=) 34.Rb7 Rg2 35.Nf7 Rh2 36.Ng5 Bf5 37.Nf3 Rh1 38.Kf2 Rd1 39.Ke2 Ra1 40.Nh4 Kf6 41.Nf5 Kf5 42.Rg7 Kf4 43.Rg6 h4 44.Rh6 Kg5 45.Rh8 Ra3 46.Kf2 Rd3 47.Rg8 Kf6 48.Rf8 Ke7 49.Rf4 h3 50.Kg1 Re3 51.Kh2 Re4 52.Rf1 Rd4 53.Kh3 Rd2 54.Kg3 Kd6 55.Kf3 e5 56.Rh1 e4 57.Ke3 Rd3 58.Ke2 Ra3 59.Rh8 Ke5 60.Rb8 Ra2 61.Kd1 d4 62.Rd8 d3 63.Rh8 e3 64.Re8 Kf4 65.Rf8 Kg5 66.Kc1 e2 (66...e2 67.Rg8 Kf6–+) 0–1. Priyadharshan,K (2135) – Sudhakar,Babu N (2000), Tamil Nadu State–ch, 2006. (=1.Nf3 d5 2.b4 c6)

4.Be2 Qb6 5.a3 a5 6.ba5 Ra5 7.0-0 Nd7 8.d4 Ngf6 9.Nbd2 Qc7= 10.Bb2 b5 11.Bd3 Bg6 12.Re1 e6=+ 13.e4 de4 14.Ne4 Ne4 15.Be4 Nb6 16.Ne5 Be4 17.Re4 Na4 18.Qc1 Bd6 19.c4 bc4 20.Bc3 Rd5=+ 21.h3 Be5–/+ 22.de5 Nc5 23.Rc4 Nb3 24.Qc2 Na1 25.Ba1 c5 26.Bd4 0-0 27.Rc5 Rc5 28.Qc5 Qc5 29.Bc5=+ Rc8 30.Bb4 Rc1 31.Kh2 Rc4 32.Kg3 g5 33.Kf3 Kg7 34.Ke3 Kg6 35.Kd3 Rc1 36.Ke4 Rc2 37.Ke3 Kf5 38.Bd6 h5 39.Kf3 Rc3 40.Ke2 Rc6 41.Kf3 g4 42.hg4 hg4 43.Kg3 f6 44.f3 gf3–+ 45.gf3 fe5 46.Bb4 Rc2 47.Bd6 Rc3 48.Kf2 Kf4 49.Ke2 Rc4 50.Kd3?? Rc6 51.Bb4 Kf3 52.a4 e4 53.Kd4 e3 (54.a5 e2–+) 0–1. Kiviaho,Allan (2240) – Sammalvuo,Tapani (2280), Helsinki We HSK, 1993.

4.Be2 Qd6 5.c3 =.

4.a3 a6 5.c4 dc4 6.Bc4 Bf5 7.Nc3 e6 8.0-0 Nbd7 9.h3 Bd6 10.Qe2 Nb6 (better 10...Bg6=) 11.e4+/- (11.e4 Bg6 12.e5+/-) 1-0. pcmvr – iozeph, net-chess.com, 2020.

4.a4 Nbd7 5.Bb2 (5.d4 Nb8=) 5...Qc7 6.c4 e5 7.cd5 cd5 (7...Nd5 8.b5+=) 8.Qb3 (8.Nc3 Bb4 9.Qb3 Bc3 10.Bc3 d4=) 8...a6 Black has an active position 9.Be2 Qd6 (9...e4 10.Nd4=) 10.b5 White gains space (10.Ba3 h5=) 10...a5 (10...Nc5 11.Qa2 e4 12.Ne5=) 11.0-0 (11.Ba3 Qb8=) 11...Qe6 (11...Nc5 12.Qa2 e4 13.Ne1=) 12.d4 e4 13.Ne5 (13.Ng5!? deserves consideration 13...Qe7 14.Rc1+=) 13...Bd6= 14.Nd7 Nd7 (14...Bd7 15.Kh1=) 15.Ba3 0-0 16.Nc3 (16.Rc1 Qh6 17.g3 Ba3 18.Qa3 Re8+=) 16...Ba3 17.Ra3 (17.Qa3 Rb8+=) 17...Nb6= In the style of Nimzovich 18.f3 ef3 19.Rf3 White has a new backward pawn: e3 19...Qe7 20.h3 Secures g4 20...Be6 21.Qa2 (21.Bd3 f5=) 21...Rac8 22.Rb3 0–1. Saleev,F – Sirotine,Konstantin (2225), RUS–ch, 2002. (=1.Nf3 d5 2.b4 c6)

4.a4 Bg4 5.h3 Bf5 6.Nd4 =.

4.Bb2 e6 =.

4.b5 a6!? 5.bc6 Nc6=+.

4.b5 Bg4 5.h3= Bh5 6.Bb2 e6 7.a4 (7.Nc3 Nbd7=) 7...c5 (7...Bd6 8.Be2=) 8.c4 Nbd7 9.d3 (9.cd5 ed5 10.g4 Bg6=) 9...Be7 10.Nbd2 0-0 11.Be2 Rc8 12.0-0 Qc7 13.Re1 Bg6 14.Rc1 (14.Nh4 Bd6+=) 14...h6 15.Qb3 Rfd8 16.Qc3 Bf8 17.Ba1 (17.Bd1 Ra8=) 17...Bh5 18.Qb2 Bg6 19.Nb3 (19.Qc3 Bd6=) 19...dc4 20.dc4 (20.Rc4 Nb6 21.Rh4 Be7=) 20...Be4 (20...Bd6 21.Red1=+) 21.a5 b6 22.Red1 Bb7 23.Nfd2 (23.Nbd2 ba5 24.Qa2 a6=) 23...Be7 24.Bf1 (24.a6 Ba8=) 24...Nf8 25.Nb1 (25.a6 Ba8=) 25...Ng6 26.Nc3 Bd6 27.Ne2? (27.a6 Bh2 28.Kh1 Ba8=+) 27...Be5 (27...ba5 28.Nc3-/+) 28.Qb1 Ba1 (28...Bh2 29.Kh1 Ne4-/+) 29.Qa1-/+ Rd1 (29...Nh4!?-/+) 30.Rd1=+ Rd8 31.Nc3 White prepares a6 31...Rd1 (31...Ne4 32.Rd8 Qd8 33.Ne4 Be4 34.Qc3=) 32.Qd1= Ne4 33.Ne4 Be4 34.a6 Nf8 35.Nd2 Ba8 36.Nf3 Qd7 37.Qe2 f6 38.Ne1 e5 39.Nd3 Be4 40.Ne1 (40.Nb2 Bb1=) 40...Ba8 41.h4 (41.Nd3 Ng6=) 41...Ne6 (41...Be4 42.Nd3=+) 42.Nd3 (42.Qg4 Nf8 43.Qe2 Be4=+) 42...Be4=+ 43.Ne1 Ba8 (43...Nc7 44.Nf3=+) 44.Qg4 Kf7 (44...Nf8 45.Qe2=) 45.Qh5 (45.Bd3 Nf8 46.Bg6 Kg8+=) 45...Kg8 46.Qf5 Nf8 47.Qh5 (47.Bd3 Qf5 48.Bf5 g6=) 47...Ne6 (47...Be4!?=+) 48.Bd3 Nf8 49.Qf5 (49.f3 Qe6=) 49...Qf5 50.Bf5 Kf7 51.Bc8 (51.f3 g6 52.Bc8 Ke7=) 51...Ke7 (51...Be4 52.Kf1=+) 52.Nd3 (52.f3!?=) 52...Kd8 (52...Kd6 53.Bf5=+) 53.Bf5 1-0. Lance5500 (2585) - LaDiva (2225), lichess.org, 2021.

4.c4 e6=+ 5.b5 (5.c5 Be7=) 5...Nbd7 (5...cb5 6.cb5 Bd6 7.Ba3=) 6.a4 (6.bc6 bc6 7.d4 Rb8=) 6...Bd6 (6...dc4 7.Bc4 cb5 8.Bb5=) 7.Bb2 (7.bc6 bc6 8.d4 0-0=+) 7...0-0 (7...dc4 8.Bc4 cb5 9.ab5=) 8.d4 c5 (8...dc4 9.Bc4 Nb6 10.Bd3=) 9.Nbd2 (9.Bd3 Qa5 10.Qd2 Qd2 11.Nbd2 cd4 12.Bd4 e5=) 9...cd4 10.ed4 (better is 10.Bd4 e5 11.Bc3=+) 10...e5 (better is 10...dc4!? 11.Rc1 Nb6=+) 11.de5 (11.c5!? e4 12.cd6 ef3 13.Nf3=) 11...Re8= 12.Be2 (12.Qe2 Ng4 13.ed6 Re2 14.Be2 Nc5=) 12...Ne5 13.0-0 Ng6 (13...Nc4 14.Nc4 dc4 15.Bc4=) 14.g3 (14.Re1 Nf4=) 14...Bg4 (14...dc4 15.Re1=) 15.cd5 (15.Re1 Rc8 16.Bf6 Qf6 17.cd5 Bb4=+) 15...Nd5=+ 16.Bc4 Nb6 17.Ba2 Rc8 18.a5 Nd7 19.Qa4 Nde5 20.Ne5 Be5 21.Qg4 Bb2–/+ 22.Rad1 Qa5 23.Bf7? Kf7–+ 24.Nc4 Rc4 25.Qc4–/+ Kf8 26.Rd7 Ne5 27.Qf4 Kg8 28.Rb7 Qd8 29.Qe4 Kh8 30.Kg2 Ng6 31.Qc6 Ne5 32.Qe4–/+ Ng6 33.Rd1 Qa8=+ 34.Qd5 Ne5 35.h3 Rf8 36.f4 Qc8?? 37.fe5+– (37...Qf5 38.Rd2 Be5 39.Qd3+– (39.Ra7?! Qf1 40.Kh2 Bg3 41.Kg3 Qg1 42.Rg2 Qa7=)) 1–0. Bulcourf,Carlos (2260) – Molchanov,Evgeny (2115), Najdorf op Buenos Aires, 2002.

4.c4 Bg4 5.h3 Bh5 6.Be2 e6 7.b5 c5 (7...Bf3!? 8.gf3 dc4 9.Bc4 a6 10.ba6 Na6+=) 8.0-0 Be7 9.Nc3 b6 10.Ne5 Be2 11.Qe2 Nbd7 (11...a6=) 12.Ng4 (better is 12.Nc6!? Qc7 13.cd5 ed5 14.d4+=) 12...Ng4+= 13.Qg4 Nf6 (13...Ne5 14.Qg7 Bf6 15.Qh6 Nc4 16.Re1–/+) 14.Qd1 (14.Qg7 Rg8 15.Qh6 dc4+=) 14...0-0 15.d3 d4 16.Ne2 e5 17.f4 de3 18.Be3 ef4 19.Nf4 Qd6 20.Rf3 Rfe8 21.Qc2 Bd8 22.Rd1? (better is 22.Qf2=) 22...Re3!–+ 23.Re3 Qf4 24.Rf3 Qd6 25.Re1 Bc7 26.Kf2 (26.g4 Re8 27.Re8 Ne8–+) 26...h6 (26...Qh2 27.Qe2 Bf4 28.a3–+) 27.Qc3 Rd8 28.Rd1?? (better is 28.g3–+) 28…Ne4! (28...Ne4 29.de4 Qd1–+) 0–1. jplayer (2020) – dsteel (2085), net–chess.com, 2013.

4.Be2 Bg4 5.0-0 e6 6.a3 Be7 7.Ne5 Be2 8.Qe2 Nbd7 9.Bb2 0-0 10.Nd7 Nd7 11.c4 Bf6 12.d4 a6 13.Nd2 Re8 14.a4 dc4 15.Nc4 e5 16.Nd6 Re7 17.Nb7 Qb6 18.de5 Be5 19.Be5 Ne5 20.Nd6 Qb4 21.Nf5 Rc7 22.Rfc1 Qe4 23.Ng3 Qg6 24.Rc3 c5 25.Rac1 c4 26.h4 Qe6 27.Rb1 g6 28.h5 Rac8 29.hg6 hg6 30.Qb2 Nd3 31.Qb6 Rc6 32.Qd4 Rd6 33.Qh4 Kg7 34.Rf1 Ne5 35.Ne4 Rh8 36.Qg3 Rc6 37.f4 Nd3 38.Nf2 Nb4 39.f5? (better is 39.e4!?=) 39...Qf5–/+ 40.Ng4? (40.e4!? Qa5 41.Rf3–/+) 40...Rh1!–+ 41.Kh1 Qf1 42.Kh2 Qf5 (better is 42...Rc5 43.Ne5 Qe2–+) 43.Qe5–/+ Qe5 44.Ne5 Rc5 ½–½. Dettmann,Holger (1940) – Schmidt,Joerg (2135), Mecklenburg VP LL2, 2005. (=1.Nf3 d5 2.b4 c6 3.e3 Nf6)

4.Be2 Bg4 5.h3 Bf5 6.0-0 h6 7.Bb2 e6 8.b5 Bd6 9.c4 0-0 10.cd5 ed5 11.bc6 Nc6 12.Nc3 a6 13.Nh4 Bh7 14.f4 Ne4 15.Ne4 Be4 16.Nf3 Qb6 17.Rb1? Qa5?? 18.a4?? Bb1–+ (19.Qb1 Qa4–+) 0–1. gtate (1815) – rhand (2050), net–chess.com, 2002.

4.Bb2 Nd7 5.c4 (5.h3 Bf5=) 5...e6 6.h3 (6.cd5 ed5 7.h3 Bf3 8.Qf3 Ngf6=) 6...Bh5 (6...Bf3 7.gf3 Ngf6 8.Rg1=) 7.a3 (7.g4 Bg6=) 7...h6 (7...Ngf6 8.g4 Bg6 9.cd5 ed5 10.Rg1+=) 8.Nc3 (8.cd5 ed5 9.Bd3 Ngf6+=) 8...Ngf6= 9.cd5 (9.d4 Be7=) 9...ed5 10.Be2 (10.d4 Bd6=) 10...a6 (10...Bd6 11.0-0=) 11.Qc2 (11.0-0 Bd6=) 11...Bg6 12.Bd3 (12.d3 Bd6=) 12...Bd3 13.Qd3 g6 (13...Bd6 14.0-0=) 14.Ne2 (14.e4 de4 15.Ne4 Be7+=) 14...Bg7 (14...Bd6 15.Nf4=) 15.h4 (15.0-0 0-0+=) 15...0-0= 16.Bd4 (16.h5 Nh5 17.Bg7 Kg7 18.Qc3 Nhf6+=) 16...a5 (16...Qe7 17.0-0=) 17.ba5 (17.0-0 Ne4=) 17...Qa5 (17...Ra5 18.0-0+=) 18.0-0 c5 (18...Nc5 19.Qb1 Nfe4 20.Bg7 Kg7 21.d3=) 19.Bc3 Qa6 (19...Qc7 20.a4=) 20.Nf4 (20.Qa6 Ra6 21.Rfb1 Rb8=) 20...Qd3+= 21.Nd3 Ra4 (21...Ne4 22.Bg7 Kg7 23.Rfb1+=) 22.Rfb1 b6 23.Nf4 Rfa8 24.g3 R8a6 25.Rb3 Bf8 26.Ne5 d4+= 27.Nd7 Nd7 28.ed4 cd4 29.Bb2 Nc5 30.Rb5 Ne4 31.d3 Nc3+= 32.Rb3 b5 33.Bc3 dc3–/+ 34.Rc3 b4 35.Rcc1 Bg7 36.Ra2 b3 37.Re2 b2 38.Rb1 Ra3 39.Rbb2–/+ Bb2 40.Rb2 g5 41.hg5 hg5 42.Nh3 f6–+ 43.Rb8 Kg7 44.Rd8 Re6 45.Rd4? Re1 46.Kg2 Rd1 47.g4 Kf7 48.Ng1 Rad3 49.Rd3 Rd3 50.Ne2 Ke6 51.Ng3 Ke5 52.Nh5 Ra3 53.Kh2 Rf3 54.Kg2 Ke4 55.Kf1 Ra3 56.Kg2 Ra6 57.Kg3 Rb6 58.Kg2 Ke5 59.Kg3 Rb7 60.Kg2 Rh7 61.Ng3 Rh6 62.Kf3 Rh4 63.Nf5 Rh1 64.Ng3 Rb1 65.Nh5 Rb6 66.Kg3 Ke4 67.Kg2 Ke5?? 68.Kg3 Rc6 69.Kf3 Rc8 70.Kg3 Rh8 71.Ng7 Ke4 0–1. Domingo Garcia,Jordi (2220) – Granados Gomez,Manuel (2425), III Sants Hostafrancs Open, Barcelona E, 2001.

4.Bb2 e6 5.a3 Nf6 6.c4 Nbd7 7.d4 Bd6 8.Nbd2 Ne4 9.Be2 Nd2 10.Nd2 Be2 11.Qe2 0-0 12.e4 a5 13.e5 Be7 14.c5 ab4 15.ab4 Ra1 16.Ba1 Qa8 17.0-0 Qa4 18.Bc3 Qc2 19.Qe3 Ra8 20.Nb1 b5 21.Rc1 Qf5 22.Qe2 Ra4 23.Qc2 Qc2 24.Rc2 Nb8 25.Kf1 Na6 26.Rb2 Bg5 27.Ke2 Bc1 28.Rb3 Ra2 29.Ke1 Bg5 30.Ra3 Ra3 31.Na3 f5 32.Nc2 Kf7 33.g3 f4 ½–½. Casero Alcaniz,P (2125) – Sanchez Quiroga,MA (2240), Cullera op–A, 2004. (=1.Nf3 d5 2.b4 c6 3.e3 Bg4)

4.Bb2 e6 5.Be2 Bf3 (5...Bb4?? 6.Bg7 Nd7 7.Bh8+–) 6.Bf3 Nf6 (6...Bb4?? 7.Bg7 Nf6 8.Bh8+–) 7.d3 (7.a3 a5=) 7...Bd6 (7...Bb4!? 8.Nd2 Nbd7–/+) 8.a3+= a5 9.ba5 Qa5 10.Nd2 Nbd7 11.0-0 0-0 12.c4 Qc7 13.g3 Be5 14.Qc2 Bb2 15.Qb2 Ne5 16.Qc3 dc4 17.dc4 Rfd8 18.Be2 Qa5 19.Qa5 Ra5 20.Nb3 Ra7 21.Nd4 Kf8 22.Rfd1 Rda8 23.f4 Ned7 24.Nc2 Nc5 25.Kf2? (25.Kg2 Nfe4 26.Rd4 Nc3–/+) 25...Ke7 (25...Nfe4 26.Kf3 Nc3 27.Rg1–+) 26.Kf3–/+ Nfe4 27.Re1 Ra4 28.Kg4 Nd2 29.Rad1 Nc4 30.Bc4 Rc4 31.Re2 Ne4 32.Rb1 b5 33.Rb4 Rb4 (33...Rc3!? 34.h3–+) 34.ab4 Ra4 ½–½. Pietraszko,Jakub (1610) – Szalbierz,Piotr, Wroclaw Poland, 2012.

4.Bb2 e6 5.h3 Bf3 6.Qf3 f6 7.b5 (7.a3 Bd6+=) 7...e5 (7...a6 8.Qh5 g6 9.Qg4=) 8.c4 (8.Be2 a6=) 8...Ne7+= 9.d4 e4 10.Qg4 (10.Qh5 g6 11.Qd1 cb5 12.cd5 Qd5+/–) 10...f5 11.Qh5 (11.Qf4 a6=) 11...g6 12.Qg5 Qd6 (12...Nd7 13.c5=) 13.Ba3 Qe6 14.cd5 cd5 15.Nc3 Nd7 16.Rc1 b6 (16...Nb6 17.Be2+=) 17.Na4 (17.Be2 h6 18.Qg3 Nc8 19.Bf8 Rf8+=) 17...Bg7 (17...Rc8 18.Rc8 Nc8 19.Bf8 Nf8 20.Be2=) 18.Rc7+/– h6 (18...Nc8 19.Be2+/–) 19.Qf4 (19.Qe7 Qe7 20.Be7 Ke7+/–) 19...g5+= 20.Qg3 (better is 20.Qd6 Qd6 21.Bd6+/–) 20...0-0?? (better is 20...f4 21.Qh2 Kd8=) 21.Rc6 (better is 21.Qd6 Qd6 22.Bd6+–) 21...Qf7 (better is 21...Nc6 22.bc6 Qc6–+) 22.Qd6?? (better is 22.Be7 Qe7 23.Nc3+/–) 22...Rfd8?? (better is 22...Nc6 23.bc6 Nf6–/+) 23.Qe7+– Rdc8 (23...Rac8 24.Nc3 Nf6 25.Bd6+–) 24.Be2 Re8 25.Qf7 Kf7 26.Bh5 Kg8 27.Be8 Re8 28.0-0 Nb8 29.Rc7 Bf6 30.Rfc1 Bd8 31.Ra7 g4 32.Ra8 Nd7 33.Rcc8 Nf6 34.Rd8 gh3 35.gh3 Kf7 36.Ra7 Kg6 37.Rd6 Kg5 38.Rg7 Kh4 39.Rf6 Rh8 40.Be7 Kh3 41.Rg3 Kh4 42.Rf5 1–0. gtate (1655) – silverfoxky, net–chess.com, 2001. (=1.Nf3 d5 2.b4 c6 3.Bb2 Bg4 4.e3 e6)

4.Bb2 Nf6 5.Nc3 =.

4.c4 e5=+ 5.Qb3 Bf3 6.gf3 d4 7.Bb2= Na6 8.c5+= Nc7 9.Bc4 Nh6 10.Ke2 Qf6 11.f4= 0-0-0 12.fe5 Qe5 13.Kd1 Qf5 14.Na3 Qf3 15.Kc2 Nf5 16.Bf7? d3–+ 17.Kc3 Ne3! 18.de3 Qf6 19.Kd2 Qf2 20.Kc3 Be7 21.Be6? Kb8 22.Kc4 Ne6 23.Be5 Ka8 24.Kc3 Rd5 25.Rhf1 Qh4 26.Nc4 Bd8 27.Bg3 Qh5 28.e4 Nd4 29.Qa4? Nb5 30.Kb3 Qe2 31.Rac1 Qe4 32.Rf7 d2 33.Rd1 Rd3 34.Kb2 Qc4 35.Rb7 Bf6 36.Kb1 Nc3 (36...Nc3 37.Kc2 Na4 38.Kb1 Rb3 39.ab3 Qb3#; 36...Rb3 37.Qb3 Qe4 38.Qd3 Qd3#) 0–1. Rasmussen,Uffe – Andersen,Ru, Copenhagen, 2000.

4.c4 e5 5.Qb3 Bf3 6.gf3 Nf6 7.Bb2 Nbd7 8.Nc3 dc4 9.Bc4= Qe7 10.a3 Nb6 11.Be2 Qd7 12.Ne4 Ne4 13.fe4 Bd6 14.Rg1 0-0 15.f4 Qe7 16.0-0-0 Kh8 17.Rg3 c5 18.bc5+/– Rac8 19.Kb1 Rc5 20.d4 Ra5 21.fe5+/– Ba3 22.Rdg1 Bb2=+ 23.Kb2 Rg8 24.Rg5 Na4 25.Kc2? Rc8–+ 26.Kd2 Nc3 27.Rg7 Ne4 (27...Ne4 28.Kd3 Re5–+) 0–1. Zakharchenko,Arnold (2380) – Mar,Karmen (2210), Nerezine 3rd, 2002.

4.c4 e6 5.Bb2 Bb4?? 6.Bg7 dc4 7.Bc4 +–.

4.c4 e6 5.Bb2 f5 6.Qc2 Nf6 (6...Bb4?? 7.Bg7 Bf3 8.gf3 (8.Bh8?! Be4 9.Qb2 Qb6+–) 8...dc4 9.Bc4+–) 7.c5 Be7 8.Be2 0-0 9.Nc3 Qe8 10.Ne5 Bh5 11.Bh5 Qh5 12.Ne2 Nbd7 13.Nf4 Qg5? (Better is 13...Qe8!? 14.Ne6 Ne5 15.Be5 Bc5 16.Qf5 g6+/–) 14.Nf3+– (14.Ne6?! Qg2 15.0-0-0 Ne5+/–) 14...Qh6 15.Ne6 Rfc8 16.Qf5 b6 17.Neg5 Nf8 18.cb6 ab6 19.a3 Rc7 20.0-0 Re8 21.Rac1 Bd6 22.Bf6 Qf6 23.Qf6 gf6 24.Nh3 Ne6 25.Nh4 Ra8 26.Nf5 Bf8 27.Rc3 c5 28.bc5 bc5 29.Nf4 Nf4 30.ef4 Rca7 1–0. Slesinski,P – Nadkierniczny,K, Poland–chT 2nd div North, 1999.

4.c4 e6 5.b5 Bd6 6.bc6 bc6 7.cd5 cd5?? (7...ed5 8.Bb2 Nf6 9.Qc2=) 8.h3?? (Better is 8.Qa4 Nd7 9.Qg4+–) 8...Bh5 9.g4 Bg6 10.Bg2 (10.Bb2 Nf6 11.g5 Nh5=) 10...f6 11.Nh4 Bf7 12.Qa4 Qd7 13.Qd7 Nd7 14.Nc3 Ne7 15.0-0 Rb8 16.a4 0-0 17.Nb5 Rb6?? 18.Na7?? Nc5?? 19.Nb5+/– Nd3 20.Nf3 Bc5 21.Ba3 Ba3 22.Ra3 Nc5 23.Nd6?? Rd6–+ 24.a5 Ra8 25.Rfa1 Nc6 26.Nd4 Ra5?? 27.Nc6 Ra3=+ 28.Ne7?? Kf8–+ 29.Ra3 Ke7 30.Ra7 Rd7 31.Rd7 Kd7 32.f4 Kd6 33.Kf2 g6 34.Kg3 e5 35.f5 e4 36.Kf4 Nd3 37.Kg3 Ne5 38.Kf4 g5 39.Kg3 Kc5 40.h4 h6 41.hg5 hg5 42.Kf2 Kc4 43.Ke1 Kd3 44.Bf1?? Kc2–+ 45.Bb5 Nc4 46.Bc4 dc4 47.Ke2 Be8 48.Ke1 Kd3 49.Kd1 Ba4 50.Ke1 0–1. SunTzuu – mirmi, Live Game Caissa's Web, 2004.

4.c4 e6 5.cd5 ed5 6.b5 c5 7.Bb2 Nd7 8.h3 Bh5 9.Nc3 Ndf6 10.Be2+= Bd6 11.Nd5!+/– Nd5? 12.Bg7+– Qe7 13.Bh8 f6 14.Qb3 Bf7 15.Qc2 Be6 16.0-0 0-0-0 17.Nd4 Nb4 18.Qc3 Bd7? 19.Rac1 Na2 20.Qa3 Nc1+/– 21.Rc1 Kb8 22.Ra1 a6 23.Nc6! Bc6 24.bc6 c4 25.Qa2 Bb4 26.Qc4 a5 27.Bf3 Qc7 28.Qb5 b6 29.d4 Ka7 30.Qb4 h5 31.d5 1–0. gtate (2745) – iozeph (2520), net–chess.com, 2009.

4.d4 Nd7 5.Be2 e5 6.Ne5 Be2 7.Qe2 Ne5 8.de5 Bb4 ½–½. Bock,Ortwin – Strangmueller,Andreas, Niederbayern–ch, 2005. (=1.Nf3 d5 2.b4 c6 3.e3 Bg4)

4.Be2 Nd7 5.d4 e6 6.a3 Ngf6 7.Nbd2 Be7 8.0-0 0-0 9.Bb2 a5 10.ba5 Qa5 11.c4 dc4 12.Nc4 Qa4 13.Qc1 Rfc8 14.Bd1 Qb5 15.Nfe5 Bd1 16.Rd1 c5 17.Nd7 Nd7 18.d5 ed5 19.Rd5 Nb6 20.Nb6 Qb6 21.Rb1 Qc6 22.e4 h6 23.Bc3 c4 24.Ra1 Bf6 25.h3 Bc3 26.Qc3 Qa4 27.e5 Rd8 28.Rc5 Rac8 29.Rc8 Rc8 30.Re1 Qd7 31.Re3 b5 32.Rg3 Rd8 33.a4 Qd1 34.Kh2 Qd2?? 35.ab5+/– Qc3 36.Rc3 Rb8 37.Rc4 Rb5 38.Re4 g5 39.Kg3 Kg7 40.Kf3 Kg6 41.g4 Rb3 42.Re3 Rb4 43.Kg3 Ra4 44.Rf3 Ra6 45.h4 Re6 46.h5 Kg7 47.Re3 f6 48.ef6 Rf6 49.Re7 Kg8 50.f3 Rf8 51.Kf2 Rf6 52.Ke3 Rf4 53.Re6 Kg7 54.Rg6 Kh7 55.Re6 Rf7 56.Re5 Kg7 57.Rf5 Re7 58.Kd4 Rd7 59.Ke5 Re7 60.Kd6 Re3 61.Kd5 Rd3 62.Ke4 Rd7 63.f4 gf4 64.Rf4 Re7 65.Kf3 Ra7 66.Re4 Rf7 67.Ke3 Ra7 68.Kf4 Rf7 69.Ke5 Re7 70.Kf5 Re4 71.Ke4 Kf6 72.Kf4 Ke6 73.Ke4 ½–½. Biaggi,Eduardo (2265) – Cranbourne,Carlos (2285), Buenos Aires FMDA op–A, 1992.

4.Be2 e6 5.0-0 Bb4 6.Bb2 Nf6 7.h3 Bh5 8.Nd4 Be2 9.Qe2 0-0 10.a3 Bd6 11.d3 a6 12.Nd2 Nbd7 13.c4 Rc8 14.N2b3 Bb8 15.Rac1 Qc7 16.Nf3 dc4 17.dc4 b5 18.cb5 ab5 19.Nbd4 Qb6 20.Nb3 Nd5 21.Bd4 Qd8 22.Rc2 N7f6 23.Rfc1= Qd7 24.Nc5 Qe7 25.Na6 h6?? 26.Bc5?? Qb7 27.Nb8+/– Qb8 28.Bf8+– Kf8 29.Rc6 Rc6 30.Rc6 b4 31.Qc4 ba3?? 32.Rc8 Qc8 33.Qc8 Ne8 34.Qa6 Ke7 35.Qa3 Kf6 36.Qb2 Ke7 37.Ne5 f6 38.Nc6 Kf7 39.Qb7 Kg6 40.Ne7 Kg5 41.Nd5 ed5 42.Qd5 Kg6 43.Qe4 Kf7 44.f4 g6 45.f5 g5 46.Qe6 Kf8 47.Kf2 Nc7 48.Qf6 Ke8 49.Qh6 g4 50.hg4 Nd5 51.Qe6 Ne7 52.f6 Kd8 53.Qe7 Kc8 54.f7 (54.f7 Kb8 55.f8Q#) 1–0. oldi62 – koralik1, kurnik, 2011.

4.Be2 e6 5.Bb2 Nd7 6.a3 Ngf6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2 e6 6.a3 Nbd7).

5.gf3 Nd7 6.f4 (6.a3 e5 7.Rg1 b5 8.Bb2 a5 9.ba5 Ngf6 =+; 6.d4 e5 7.b5 ed4 8.Qd4 Be7 9.Qd2 Bf6 =+) 6...Ngf6 7.a3 e6 8.Bb2 b5 9.a4 ba4 =+.

5.gf3 e5 6.Bb2 (6.Rg1 Nd7 7.b5 cb5 8.Bb2 a6 9.f4 ef4 =; 6.a3 Nd7 7.Bb2 Ngf6 8.Rg1 a5 9.b5 Qe7 =) 6...Qg5 7.a3 Bd6 8.d4 Qf6 9.c4 Ne7 =.

5.gf3 Nf6 6.d4 (6.Rg1 Qb6 7.a3 a5 8.b5 Nbd7 9.Bb2 e6 =; 6.a3 e5 7.d4 Bd6 8.Rg1 0-0 9.e4 Qe7 =+) 6...Nbd7 7.a3 a5 8.b5 c5 9.dc5 Nc5 =.

5.Qf3 Nd7 6.a3 Ngf6 7.d4 e6 8.c4 Bd6 9.c5 Bc7 =.

5.Qf3 Nd7 6.d4 e5 7.a3 Bd6 8.c4 Ngf6 9.c5 Bc7 =+.

5.Qf3 e5 6.Qg3 (6.a3 Bd6 7.e4 de4 8.Qe4 Nf6 9.Qe3 0-0 =+; 6.Bb2 Nd7 7.a3 Ngf6 8.Be2 Bd6 9.Qg3 0-0 =+) 6...Nd7 7.Bb2 Qe7 8.a3 Ngf6 9.Bd3 b5 =.

5.Qf3 e6 6.Bb2 (6.a3 Nd7 7.d4 Bd6 8.Bd3 e5 9.de5 Ne5 =+; 6.c3 Bd6 7.d4 Nf6 8.Bd3 0-0 9.0-0 a5 =+) 6...Nd7 7.a3 a5 8.b5 Ngf6 9.Be2 Bd6 =.

5.Qf3 Nf6 6.d4 (6.Qf4 Nbd7 7.d4 e6 8.a3 b5 9.Bd3 a5 =+; 6.Bb2 Nbd7 7.Qf4 e6 8.a3 a5 9.Be2 b5 =) 6...e6 7.a3 Bd6 8.Nd2 0-0 9.c4 e5 =.

4.Bg2 e5 5.d3 Bb4–/+ 6.Bd2 Bd6 7.0-0 f5 8.Nc3 Ngf6 9.Re1 0-0–+ 10.e4 d4 11.Na4 b5 12.Nb2 fe4 13.de4 Rb8 14.c3 c5 15.cd4 cd4 16.Qb3 Kh8 17.Nd3 Qe8 18.Bb4 Bb4 19.Nb4 Bb7 20.Nd2 Nc5 21.Qb2 a5 22.Nc2?! Nd3 (22...Nd3 23.Qa3 Ne1 24.Ne1 Ra8–+) 0–1. Burgin – Leyen,Peter, email CTON, 1996.

4.Bg2 g6 5.Bb2 Ngf6 6.0-0 Bg7 7.d3 0-0 8.Nbd2 b5 9.c4 Bb7 10.a4 dc4 11.dc4+= (11...bc4 12.Nc4+=). pumpkin (2230) – alexp (2170), net–chess.com, 2005.

3.a3 Nf6 4.Bb2 e5 5.d3 Be6 6.Nbd2 Bd6 7.g3 0-0 8.Bg2 e4 9.Ng5 h6 10.Ne6 fe6 11.0-0 Nh5 12.de4 g5 13.ed5 ed5 14.Nf3 Qe8 15.Qd5 Kh7 16.Qd3 Kg8 17.Rfe1 Ne5 18.Qd5 Kh7 19.Be5 Be5 20.Ne5 Rc8 21.Be4 Kg7 22.Qd4 Nf6 23.Ng4 Rd8 24.Qb2 Qe4 25.Nf6 Rf6 26.f3 Qe3 27.Kg2 h5 28.c4 h4 29.g4?? h3 30.Kh3 Rh8 31.Kg2+– Qf4 32.Rh1 Kg6 33.Qc2 Kg7 34.Rad1 Rfh6 35.e4 Rh3 36.Kg1 Qe3 37.Qf2 Qb3?? 38.Rd7 Kg6 39.Qd2?? Qb1?? 40.Qd1 Qd1 41.Rd1 Rf3 42.Kg2 Rhh3 43.Rde1 Ra3 44.e5 1–0. linakip – antimaki, kurnik, 2011.

3.Bb2 Bg4 4.b5+= Nb8 (4...Na5 5.h3 Bf3 6.ef3=) 5.e3 Nd7 6.Be2 Ngf6 7.h3 Bh5 8.0-0 e6 9.a4 Bd6 10.d3 e5 11.Nbd2 0-0 12.Rc1 Re8 13.c4 e4 14.de4 de4 15.Ng5? (15.Nd4!? Be2 16.Qe2+=) 15...Bg6 (better is 15...Be2 16.Qe2 h6–+) 16.Qc2? (16.h4 Nc5–/+) 16...Nc5?? (16...h6 17.Nf7 Bf7 18.Nb3–+) 17.Qd1?? (17.Nb3 Nfd7 18.h4 h6 19.Nc5 Nc5–+) 17...Qd7 (better is 17...h6 18.Nf7 Bf7 19.Bd4–+) 18.f3 (better is 18.h4–/+) 18...h6?? (better is 18...ef3 19.Ngf3 Re3 20.Bf6 gf6–+) 19.Nf7?? (19.Nge4 Nfe4 20.Ne4 Be4 21.fe4 Re4 22.Bd4=) 19...Qf7–+ (19...Kf7?! 20.Ne4 b6 21.Nd6 Qd6 22.e4–+) 20.fe4 Be4 21.Bf3? Bf3 22.Qf3 Qg6 23.Bf6 gf6 24.Qf6 Qf6 25.Rf6 Rf8 26.Rcf1 Rf6 27.Rf6 Kg7 28.Rf5 Na4 29.Ne4 Rd8 30.c5 Bf8 31.c6 bc6 32.bc6 Nb6 33.Nc5 Rd6 34.Nd7 Nd7 35.cd7 Rd7 36.Ra5 c6 37.Ra6 Rc7 38.Kf1 Bc5 39.Ke2 Bb6 40.e4 Rd7 41.Ra1 Kf6 42.Rf1 Ke5 43.g4 Rd4 44.Rc1 Re4 45.Kf3 Re3 46.Kg2 c5 47.Rc4 Re4 48.Rc2 c4 49.Kf3 Ba5 50.Kg2 c3 51.Kf3 Kd4 52.Kg2 Kd3 53.Rc1 Re2 54.Kf1 c2 55.Ra1 Bc3 56.Ra7 c1Q# 0–1. axelroses – torpov, kurnik, 2012.

3.b5 a6 4.bc6 bc6 5.Bb2 e6 6.d3 Bc5 7.Nbd2 Nf6 8.g3 Bd7 9.Bg2 0-0 10.0-0 Rb8 11.Be5 Bd6 12.c4 Be5 13.Ne5 dc4 14.Ndc4 Rb4 15.Nd7 Qd7 16.Qd2 c5 17.Ne5 Qd4 18.Nc6 c4 19.Nd4 Rd8 20.Nc6 Nd5 21.Nb4 Nb4 22.Qb4 g6 23.Qe7 Rf8 24.Qf6 c3 25.Qc3 c6 26.Qf6 c5 27.Be4 Rb8 28.h4 g5 29.h5 a5 30.h6 Kf8 31.Bh7 Ke8 32.Be4 Kd7 33.h7 Kd6 34.h8Q Kd7 35.Qhg7 Kc7 36.Qgf7 1–0. alfy – piter0224, kurnik, 2012.

3.b5 Nd4??+– 4.Nd4 e5 5.Nf3 Nf6 6.Ne5 Bc5 7.e3 d4 8.Bc4 0-0 9.Bb2 Qd6 10.Nd3 de3 11.fe3 Bg4 12.Qc1 Ne4 13.0-0 Rae8 14.Rf4 Bh5 15.a4 b6 16.Nc5 Qc5 17.Ba2 Qe7 18.Bd5 Bg6 19.Ba8 Ra8 20.d3 Nc5 21.Nc3 Rad8 22.a5 Ne6 23.Rfa4 Nc5+– 24.R4a2+/– Rfe8 25.e4 Ne4?+– 26.Ne4 Be4 27.de4 Qc5 28.Kh1 Re5?? 29.ab6 ab6 30.Ba3 Qf2? 31.c4 Qd4 32.Bb2 Qc5 33.Ra8 Ree8 34.Rd8 Rd8 35.Qc3 f6 36.Re1 Qf2 37.Bc1 Rd3 38.Qb4 Rd6 39.Be3 Qc2 40.Kg1 Qe4 41.Bb6 Qb7 42.c5 Rb6 43.Re8 Kf7 44.c6 Rb5 45.Rf8 Kg6 46.Qe4 f5 47.Qe6 Kg5 48.cb7 1–0. Lindberg,Rune – Preston,William, MCO 2, 1996.

3.b5 Ne5?? 4.Ne5+– a6 (4...f6 5.Nf3+–) 5.e3 Nf6 6.ba6 ba6 7.c4 e6 8.cd5 Qd5 9.d4 Bb4 10.Bd2 Bd2 11.Nd2 c5 12.Qa4 Nd7 13.Rd1 0-0 14.Ndf3 Ne5 15.de5 Qb7 16.Bd3 Bd7 17.0-0 h6 18.Qe4 Qe4 19.Be4 Ra7 20.Rd6 c4 21.Rc1 Rb8 22.Rc4 Kf8 23.Nd4 Bb5 24.Rc3 Ke7 25.f4 Rd7 26.Nb5 ab5 27.Rd7 Kd7 28.Bc6 Ke7 29.Rb3 b4 30.Ba4 f5 31.Rb2 g5 32.fg5 hg5 33.Kf2 g4 34.Kg3 Rc8 35.Rb4 Rc5 36.Kf4 Kf7 37.e4 Rc1 38.ef5 Rf1 39.Kg4 Rf5 40.Rf4 1–0. Lindberg,Rune – Preston,William, corr SSKK–BPCF, 1996.

3.Nc3 e5 4.g4?? (4.b5 e4 5.bc6 ef3 6.cb7 fg2 7.Bg2 (worse is 7.ba8Q gh1Q 8.Qc6 Qd7–/+) 7...Bb7 8.Rb1=) 4...Bg4 5.Rg1 (5.a3 Nf6–+) 5...Nf6 (5...Bf3 6.b5 Nd4 7.ef3–+) 6.h3 (6.b5 Nd4 7.Nd4 ed4–+) 6...Bh5 (better is 6...Bf3 7.b5 Nd4 8.ef3 Qe7–+) 7.e3?? (better is 7.b5 Ne7 8.Ne5–/+) 7...Bb4 (7...e4 8.Be2 ef3 9.Bb5–+) 8.Bb2 (8.Be2 e4 9.Nd4 Bc3 10.dc3 Be2 11.Qe2 Rg8–+) 8...Qe7 (8...e4 9.Rg7 Bf3 10.Be2–+) 9.a3? (9.Be2 d4 10.Nb1 Bf3 11.Bf3 0-0–+) 9...e4 (better is 9...Bc3 10.Bc3 e4 11.Rg7 Bf3–+) 10.ab4 Bf3 (10...ef3?! 11.Rg7 d4 12.Nb5–/+) 11.Qc1 0-0?? (11...Rg8 12.Nb5 Nh5 13.Bc3–+) 12.Qb1?? (better is 12.Nd5 Nd5 13.Rg7 Kh8 14.Rf7 Kg8 15.Re7 Nce7 16.c4+–) 12...Nb4–+ 13.Ba3 c5 14.Nd5 Nfd5 15.Bb4 Nb4 16.d4 Qh4 17.Qb2 Rfd8 18.dc5 f6 19.Qb4–/+ Bh5 20.Qb7+= g5? 21.Ra4?? Rd1. fredoluv – rfanning, net–chess.com, 2002.

3.e3 Nb4 4.Ba3 c5 5.c4 Bf5 6.Bb4 cb4 7.Qa4 Bd7 8.Qb4= Bc6 9.Nc3 a5 10.Qb1 g6? 11.d4 Rb8? 12.a4?? dc4= 13.Bc4 e6 14.0-0 Bb4 15.Nb5 Nf6 16.Ne5+= 0-0 17.f3 Bd5 18.Rc1 Bd2–/+ 19.Rc2 Be3 20.Kh1 Rc8 21.Qb2 Qb6 22.Qc3 Bc6?? 23.Qe3+– Rfd8 24.Be2 Nd5 25.Qd2 Nb4 26.Rc5?? Bb5?? 27.Rb5 Qd4 28.Qd4 Rd4 29.Rb7 Nc2 30.Rc1 Rd2 31.Bd3 Rc5 32.Nd7 Rd3?? 33.Nc5 Rd2 34.Ne4 Re2 35.Nd6 f5 36.Rd1 Ne3 37.Rc1 Nc2 38.Rc7 Ne3 39.Ra7 Rc2 40.Rc2 Nc2+– 41.Ra5 Nd4 42.Kg1 Nb3 43.Ra8 Kg7 44.a5 e5 45.a6 Nc5 46.a7 Nb7 47.Nb7 Kf6 48.Rf8 Kg7 49.a8Q Kh6 50.Qa4 Kg5 51.g3 h5 52.Qh4 Kh6 53.Qf6 h4 54.Rh8# 1–0. goffy – kong, ChessWorld.net, 2005.

4.Bb2 Bd6 (--> 1.b4 e5 2.a3 d5 3.Bb2 Bd6 4.Nf3 Nc6).

4.e3 e4 5.Nd4 +=.

4.e3 Nf6 5.Bb2 Bd6 (5...e4 6.Nd4+=) 6.c4 (6.b5 e4 7.bc6 ef3 8.Qf3 bc6 9.Bf6 Qf6 10.Qf6 gf6+=) 6...d4 (6...e4 7.cd5 Nd5+= (worse is 7...ef3 8.dc6 fg2 9.Bg2+/–)) 7.ed4 e4 8.Qe2 (better is 8.Ne5!?+=) 8...0-0 9.Ne5 Ne5?? (better is 9...Be5 10.de5 Nd4=) 10.de5+– Bg4 11.Qe3 Rc8 (11...Be5 12.Be5 Re8+–) 12.ef6 (worse is 12.ed6 Qd6 13.h3 Bd7+–) 12...gf6 13.Qh6 (13.Qe4 Re8 14.f3 Re4 15.fe4 Qe7–/+) 13...Be5 14.Be5 fe5 15.Nc3 Qd4 (15...Kh8+–) 16.Qg5 Kh8 17.Qg4 c5 (17...f5 18.Qg5+–) 18.b5 (better is 18.Qe4!? Rfd8 19.Ra2 Qe4 20.Ne4 b6+–) 18...Rcd8 19.Rd1 Rg8 (19...f5 20.Qg5 Rd7 21.Nd5+–) 20.Qh4 Rg6 21.Qe4 Qe4 22.Ne4 Rg4 (22...b6 23.Nc3+–) 23.d3 (23.f3 Rg6 24.Nc5 b6+–) 23...a5 (23...b6 24.g3+–) 24.Nc5 b6 25.Ne4 f5 26.Be2 Rg2 27.Ng3 f4 28.Bf3 Rg3 29.hg3 fg3 30.fg3 Rf8 31.Be4 Rf7 32.Kd2 Rf2 33.Kc1 Ra2 34.Rh7 Kg8 35.d4 ed4 36.Rd4 Ra3 37.Rd8 1–0. Sundfar – Innessa, playchess.de, 2003.

4.a3 Nc6 –/+.

4.Nc3 Nf6 5.a3 Nc6 6.e3 e5. mgokhale (1850) – pwillows (2100), net–chess.com, 2010.

4.Bb2 (--> 1.b4 d5 2.Bb2 Nc6 3.b5 Na5 4.Nf3).

4.d3 a6 5.a4 c6 6.Nc3 Nf6 7.e3 e6 8.d4 Bb4 9.Bd2 Bd7 10.Qb1 Bc3 11.Bc3 b6 (11...Ne4!? 12.Qb2 cb5 13.ab5 Nc3 14.Qc3 ab5=) 12.Ba5+/– ba5 13.b6 Rb8 14.b7 Qc7 15.Ba6 c5 16.Qb2 cd4 17.Nd4 e5 (17...Ne4!? 18.c4 dc4=) 18.Nb5+/– Bb5 19.Qb5 (worse is 19.Bb5 Ke7+=) 19...Qd7 (better is 19...Ke7!? 20.0-0 Rhd8+/–) 20.Qa5+– Ke7 (20...0-0 21.c4+–) 21.Qc5 Qd6 22.Qd6 Kd6 23.0-0 Rbc8?? (23...Rhd8 24.c4 d4+–) 24.bc8R Rg8 25.a5 d4 26.Rg8 Ng8 27.ed4 Nf6 28.de5 (28.de5 Ke5 29.Rfe1 Kd6 30.Red1 Kc7 31.Bb5+–) 1–0. Carloschess – Maz, playchess.de, 2003. (=1.Nf3 d5 2.b4 Nc6 3.b5 Na5)

4.e3 b6 5.Bb2 Bd7 6.Nc3 e6 7.Bd3 Bb4? (better is 7...c5+=) 8.Nd5!+– ed5? (better is 8...Bf8 9.Nf4 c6+–) 9.Bg7 Bg4 10.Bh8 Ke7 (10...h6 11.h3 Bh5 12.0-0+–) 11.h3 Bh5 12.g4 Bg6 13.Qb1 Bd6 14.Qb2 f6 15.Bg6 hg6 16.g5 Nc4 17.gf6 Kf7 18.Ng5 Kf8 19.Qd4 Be5 20.Bg7 Ke8 21.f7 Kd7 22.Qd5 (22.Qd5 Kc8 23.Qd8 Kd8 24.fg8Q Kd7 25.Qe6 Kd8 26.Nf7; 22.fg8B?! Bd4 23.Be6 Ke8 24.Bd4 Qg5+/–) 1–0. Anonymous – 12345, sv.lichess.org, 2011.

4.e3 c6 5.a4 a6 6.d4 ab5 7.ab5 cb5 (7...Nf6 8.Bd3+=) 8.Bb5 Bd7 9.Be2 e6 10.0-0 Rc8 (10...Nf6 11.Nbd2+=) 11.Bd2 (11.Ba3 Ba3 12.Na3 Nf6+=) 11...b6 (11...Nc4 12.Bc4 Rc4 13.Ne5+=) 12.Ba5 (12.Nc3 Nf6+=) 12...ba5= 13.Qd2 (13.Ne5 Nf6=) 13...Bb4 14.c3 Bd6 15.Bd3 (15.Rc1 Nf6=) 15...Nf6 16.Rc1 0-0 17.Na3 Ne4 18.Qe1 Ba3 (18...Rb8!?=) 19.Ra3+= f6 20.c4 dc4?? (better 20...a4+/-) 21.Be4+- a4 22.Nd2 Qa5 (22...Bb5 23.Rac3+-) 23.Qd1 (23.Rac3 Bb5+-) 23...Qb4 (23...f5 24.Bc2 f4 25.ef4+-) 24.Rcc3 (24.Rac3 f5 25.Rc4 Rc4 26.Rc4 Qb6+-) 24...Rc7 (24...f5 25.Bc2 Bb5 26.Ba4+-) 25.Qb1 (25.Qc2!? f5 26.Bf3 Bb5+-) 25...Qb1 26.Bb1 Rb8 27.Ra1 Rb4 28.Ba2 Bb5 29.Rb1 Rb1 30.Nb1 h5 31.Na3 Kh8 (31...Ba6+-) 32.Nb5 (32.Nb5 Rc8 33.Rc4+-) 1-0. Lee,Wing Kin - Tam,Tsz Chun, ch-HKG, 2018.

4.e3 Bg4 5.Bb2 b6 (5...e6!?=) 6.Be2 Bf3 7.Bf3 e6 8.0-0 Nh6 (8...a6 9.a4+=) 9.d3 Nb7 (9...a6 10.e4 d4 11.e5+=) 10.Nd2 (10.c4 Qg5+–) 10...Nd6 (10...Nc5!?+/–) 11.c4+– Rb8 12.Qb3 dc4 13.Nc4 Nc4 (better is 13...c5+–) 14.Bc6 Ke7 15.dc4 Nf5 (15...f6 16.Rad1 Qc8 17.Qd3+–) 16.Rad1 (16.e4!? Nd6 17.e5 f5 18.ed6 cd6+–) 16...Nd6 17.e4 f6 18.f4 Qc8 19.e5 Nb7 20.Rd7 (better is 20.ef6!? gf6 21.Bd7 Nc5 22.Bf6 Kf7+–) 20...Qd7 21.Bd7 Kd7 22.f5 Bc5 23.Kh1 ef5 (23...fe5 24.Qg3 ef5 25.Qg7 Be7 26.Be5+– (worse is 26.Rf5 Rbf8 27.g4 Rf5 28.gf5 Rf8+–; 26.Qe5?! Rhf8+–)) 24.Qd3 Kc8 (24...Nd6 25.ed6 cd6 26.Qf5 Kc7 27.Qg4+–) 25.Qf5 Kd8 26.ef6 Nd6 (26...g6 27.Qd5 Nd6 28.f7+–) 27.Rd1 (better is 27.fg7 Nf5 28.gh8Q (28.gh8N?! Ne3 29.Rf4 Ke7+/–; 28.gh8B?! Ne3 29.Rf4 Kd7+–) 28...Kd7 29.Qb8+–) 27...g6 28.Qg4 Rf8 29.Bc1 (better is 29.f7!? Rf7 30.Qe6 Rf5+–) 29...a6 (29...h5 30.Qh3 Rc8+–) 30.Bg5 (30.Bg5 h6 31.Bh6 Rf6 32.Bg5+–) 1–0. Pies,Gerhard – Balduan,Karl Heinz, Leverkusen op, 2004. (=1.Nf3 d5 2.b4 Nc6 3.b5 Na5)

4.a3+– Nc2 5.Qc2 1–0. wesolyPolak (1615) – NN, GameColony.com, 2002.

4.a3+– Qd6 5.ab4 Nf6 6.e3 e5 7.c4 Bf5 (7...dc4 8.Bc4 e4 9.Nd4+–) 8.c5 Qe7 9.Bb2 0-0-0 (9...d4+–) 10.Ra7 Re8 (10...Nd7+–) 11.c6 bc6 12.bc6 Kd8 13.Ra8 Bc8 14.Rc8! Kc8 15.Qa4 1–0. Knudsen,Niels M – Tacheny,Alan D, IECG, 1998. (=1.Nf3 d5 2.b4 Nc6 3.b5 Nb4??)

4.a3+– e5 5.ab4 (5.Ne5 Qf6 6.d4 Bf5 7.ab4 Bb4 8.c3 Bb1 9.cb4 Be4+-) 5...Bb4 (5...e4 6.Nd4+-) 6.Ne5 Qf6 (6...Nf6 7.e3+-) 7.Nd3 Qa1 8.Bb2 (8.Nb4?! Qb1 9.Nd5 Bf5=) 8...Qa4 9.Bg7 (9.Nb4?! Ne7 10.Nd3 0-0+-) 9...Ne7 10.Bh8 Bf5 (10...Qb5 11.e3+-) 11.Nb4 Qb4 12.e3 Bc2 (12...Qa4+-) 13.Qc2 0-0-0 (13...Qe4 14.Qe4 de4 15.Nc3+-) 14.Bc3 (14.Bd4 h6+-) 14...Qg4 (14...Qe4 15.Qe4 de4 16.Bf6+-) 15.h3 (15.Qh7 Qe6+-) 15...Qg5 (15...Qg6 16.d3+-) 16.g3 (16.Qh7 Qg6 17.Qg6 fg6+- (17...Ng6?? 18.h4+-)) 16...Re8 (16...h6 17.h4 Qh5 18.Bd4+-) 17.Bg2 (17.Qh7 Qg6 18.Qg6 fg6+-) 17...d4 (17...Qg6 18.Qa2+-) 18.Bd4 Qb5 19.Nc3 Qa6 20.Qa2 (better 20.Nd5 Nd5 21.Bd5 Qg6+-) 20...Qd3 (20...Qa2 21.Na2 a6 22.d3+-) 21.Qa7 Nc6 22.Bc6 bc6 23.Qc5 (23.Na4 Qb1 24.Ke2 Qb8 25.Qa6 Qb7 26.Qb7 Kb7 27.Nc5 Kc8+-) 23...Re6 (23...Kd7 24.Qh5 Qg6 25.Qg4 f5 26.Qf3+-) 24.Qf8 Kb7 (24...Kd7 25.Qf7 Re7 26.Qf6+-) 25.Qb4 (better 25.Qf7!? Qg6 26.Qg6 Rg6+-) 25...Kc8 26.Qb1 (better 26.f3 Kd7+-) 26...Qd4 27.0-0 (27.Qh7 Qf6+-) 27...Qd2 28.Ne4 (better 28.Qh7 Qd7+-) 28...Qd5 29.f3 f5 30.Ng5 (30.Rd1 fe4 31.Rd5 cd5+-) 30...Rg6 (30...Re3 31.Rd1 (31.Nh7?! Rf3 32.Qe1 Rf1 33.Qf1 c5+-) 31...Qa5 32.Kh1+- (32.Nh7?! Rf3 33.Kg2 Qa3+-)) 31.f4 h6 (31...Rd6+-) 32.e4 (better 32.Rd1 Qa5 33.Qb2 hg5 34.Qh8 Kb7 35.Rb1 Qb5 36.Rb5 cb5 37.Qh5+-) 32...Qd4 33.Kh2 (33.Rf2 hg5 34.e5 Qd7+-) 33...hg5 34.fg5 (34.e5 Qd2 35.Kg1 Qd4 36.Rf2 Qd7+-) 34...Rg5 (34...fe4 35.h4 Qd2 36.Kh1 Qe2 37.Rf8 Kd7+-) 35.Rf5 (35.Qc1 Rh5 36.ef5 Qg4+/-) 35...Qd2 (better 35...Rf5!? 36.ef5 Qf2 37.Kh1 Qf3 38.Kg1 Qg3 39.Kf1 Qh3 40.Kf2 Qh2 41.Kf3 Kd7=) 36.Kh1+/- Rf5 37.ef5 Qf2? (better 37...Qd5 38.Kg1 Qf3+/-) 38.Qf1?? (38.Qd3!? c5 39.g4 c6+-) 38...Qg3 (better 38...Qf1 39.Kh2 c5-+) 39.f6+/- Qg8 (better 39...Qe5 40.Qf3 Kd7 41.Qg4 Kd6+/-) 40.f7 Qf8 41.Qf6 (41.Qf5 Kd8 42.Qf6 Kd7+-) 41...Kb7? (better 41...c5+-) 42.Qe6 (42.h4 c5+-) 42...Qg7 (42...Qc5 43.Kg2+-) 43.Qe8 (better 43.h4!? Qa1 44.Kg2 Qg7 45.Kh3 Qc3 46.Kg4 Qg7 47.Kf4 Qd4 48.Kf5 Qf2 49.Kg5 Qg3 50.Qg4 Qd6+-) 43...Qa1 44.Kh2 Qb2 45.Kg3 Qc3 46.Kh4 (46.Kf2 Qc5 47.Qe3 Qf5 48.Qf3 Qc5 49.Ke2 Qc4 50.Ke3 Qb3 51.Kf2 Qb2 52.Kg1 Qc1 53.Kg2 Qb2 54.Qf2 Qg7 55.Kh2 Qe5 56.Qg3 Qf5 57.Qb3 Kc8+/-) 46...Qd4 47.Kg5 Qg7 (47...Qc5 48.Kh6 Qc1 49.Kh5 Qd1 50.Kg5 Qg1 51.Kf6 Qf2 52.Kg7 Qg3 53.Kf8 Qh3 54.Qe4+-) 48.Kf5 Qh7 49.Kf6 (49.Kg4 Qg6 50.Kf3 Qf5 51.Ke2 Qh5 52.Kd2 Qg5 53.Kd3 Qf5 54.Kc4 Qd5 55.Kc3 Qc5 56.Kb3 Qd5 57.Kc2 Qc5 58.Kd1 Qh5 59.Ke1 Qh4 60.Kf1 Qh3 61.Kf2 Qf5 62.Ke3 Qg5 63.Ke4 Qh4 64.Kd3 Qg3 65.Kc4 Qf4 66.Kb3 Qg3 67.Kc2 Qf2 68.Kc3 Qg3 69.Kb4 Qd6 70.Ka4 Qd4 71.Kb3 Qd3 72.Kb2 Qd2 73.Kb1 Qd1 74.Ka2 Qd2 75.Ka3 Qd3 76.Kb4 Qd6 77.Kc4 Qf4 78.Kc5 Qd6 79.Kc4 Qf4=) 49...Qh6= 50.Ke7?? (better 50.Ke5 Qe3 51.Kf5 Qf3 52.Kg6 Qg3 53.Kf6 Qf4 54.Kg7 Qg5 55.Kf8 Qh6 56.Kg8 Qg6 57.Kh8 Qh5 58.Kg7 Qg5 59.Kh7 Qh5 60.Kg7 Qg5=) 50...Qh4 (50...Qd6) 51.Kd7+/- Qd4 52.Ke7?? (52.Ke6 Qe3 53.Kf5 Qh3 54.Kf4 Qh4 55.Ke5 Qh2 56.Ke4 Qh4 57.Kd3 Qg3 58.Kc4 Qg4 59.Kb3 Qh3 60.Kb4 Qg4 61.Kc3 Qf3 62.Kd2 Qf2 63.Kc1 Qg1 64.Kc2 Qg2 65.Kb1 Qg1 66.Kb2 Qg2 67.Ka3 Qf3 68.Ka4 Qd1 69.Kb4 Qg4 70.Kc5 Qg1 71.Kc4 Qg4 72.Kc5 Qg1 73.Kc4 Qg4=) 52...Qh4 (52...Qd6) 53.Kf8 (53.Ke6 Qh3 54.Kf6 Qh6 55.Kf5 Qh5 56.Kf4 Qh4 57.Ke5 Qh5 58.Ke4 Qe2 59.Kf4 Qf2 60.Kg4 Qg2 61.Kf5 Qf3 62.Kg6 Qg4 63.Kf6 Qf4 64.Kg7 Qg5 65.Kf8 Qh6 66.Kg8 Qg6 67.Kh8 Qh5 68.Kg7 Qg5 69.Kh7 Qh5 70.Kg7 Qg5=) 53...Qh6 54.Ke7?? (better 54.Kg8 Qg6 55.Kh8 Qh6 56.Kg8 Qg6 57.Kf8 Qh6 58.Ke7 Qd6) 54…Qh4 (54...Qd6) ½-½. bvamrx (2010) - geniusa1 (1995), lichess.org, 2021.

4.a3+– e6 5.ab4 Bb4 6.Ba3 (6.Bb2 Nf6+–) 6...Qe7 (6...Ba3 7.Ra3 Nf6 8.d4+–) 7.e3 (7.Bb4 Qb4 8.Nc3 Nf6+–) 7...Nf6 (7...Ba3 8.Na3 Nf6 9.c4+–) 8.c3 (8.Bb4!? Qb4 9.Nc3 0-0+–) 8...Ba3 9.Ra3 Bd7 (9...e5 10.d4 e4 11.Ne5+–) 10.d4 0-0 11.Bd3 Ne4 12.Qc2 f5 13.0-0 Be8 (13...Nd6 14.Qb2+–) 14.Ne5 Qh4 (14...Nd6 15.Qb3+–) 15.f3 (15.c4 dc4 16.Bc4 Qe7+–) 15...Nf6 (15...Nd6 16.Qb2+–) 16.c4 Rd8 (16...c6 17.bc6 Bc6 18.Nc3+–) 17.Ra7 c6 (17...f4 18.Qd2 fe3 19.Qe3+–) 18.c5 (better 18.Rb7 cb5 19.cb5 Nd7+–) 18...Rb8 19.Nc3 Bh5 (19...Nd7 20.Nd7 Bd7 21.Rfa1+–) 20.bc6 bc6 21.Nc6 Rbe8 (21...Ra8 22.Re7 Rae8 23.Ra1+–) 22.Qf2 Qg5 (22...Qf2 23.Rf2 g5 24.Rfa2+–) 23.h4 (23.Nb5 Ne4 24.Qe1 Nf6+–) 23...Qg6 (23...Qh6 24.Ne5+–) 24.Ne7 Re7 25.Re7 Re8 26.Re8 Qe8 27.Bb5 (27.Ra1 Qd7+–) 27...Qe7 (27...Qb8 28.Qa2 Ne8 29.Ra1+–) 28.Ra1 Qd8 (28...Be8 29.Qg3 f4 30.Qf4+–) 29.Ra7 g6 (29...Qb8 30.Qa2 Qg3+–) 30.Qa2 Qf8 31.Ra8 Qa8 32.Qa8 Kg7 33.c6 Ng8 34.Qg8! Kg8 35.c7 Kg7 (35...Kf7 36.c8Q Kg7 37.Qd7 Kh8 38.Qe6 g5 39.Nd5 h6 40.Ne7 Kg7 41.Qg8 Kf6 42.Nd5) 36.c8Q Kf6 (36...g5 37.Qe6 g4 38.Qe7 Bf7 39.Be8 h5 40.Qf7 Kh8 41.Bd7 f4 42.Bf5 fe3 43.Qh7) 37.Qf8 1–0. Campos,Westerley Batista (1760) – Machado,LS (1800), Championship Brasiliense Absoluto, 2015.

4.Bb2 Bf5 5.Na3 d4 6.Nd4 Be4 (6...Bg6 7.e3+/–) 7.d3 Bd5 (7...Bg6 8.e4 e5 9.Nf3+–) 8.c4+– Be6 (8...e5 9.Nb3 (9.cd5?! ed4 10.Bd4 Qd5+/–) 9...Be6 10.Nb1+–) 9.Nac2?? (better is 9.Ne6 fe6 10.Nc2 Nc2 11.Qc2+–) 9...Nc2+/– 10.Qc2 Nf6? (better is 10...Bd7!?+/–) 11.Ne6+– fe6 12.e4 Nd7 13.Be2 Nc5 (13...e5+–) 14.0-0 e5 15.d4 (better is 15.Be5 e6 16.d4+–) 15...ed4+/– 16.Rad1 e5+= 17.f4 Qh4 18.fe5 Be7? 19.Rd4 Bg5 20.Bf3?? Be3+= 21.Kh1 Bd4 22.Bd4 Ne6 23.Rd1?? Nf4 24.Bf2 Qg5 25.Qd2 0-0 26.e6 Rf6?? 27.e7 Nh3?? 28.Qg5 Ng5 29.Rd8 Rd8 30.ed8Q Rf8 31.Qg5 1–0. gtate (1750) – eeethomas, net–chess.com, 2001.

4.Bb2 Bf5 5.Nd4 Bg6 6.c3 (6.a3 e5 7.ab4 ed4 8.Bd4 Nf6+=) 6...c5 7.bc6 (better is 7.cb4 cd4 8.Bd4+=) 7...Qb6?? (better is 7...Nc6 8.Nc6 bc6+=) 8.cb4 (8.cb7!? Qb7 9.Qa4 Qd7 10.Qd7 Kd7 11.cb4 e5+–) 8...bc6 9.Qa4 Rc8 10.e3 e6 (10...e5 11.Nf3 f6 12.Ba6+–) 11.Ba6 Rc7 12.Nc6! Rc6 13.Bb5 Bc2 14.Bc6 Kd8 15.Qa5 Qa5 16.ba5 Ne7 17.Bb5 Ng6 18.Nc3 Ne5 19.Rc1 Bg6 20.0-0 Bd6 21.d4 Nd3 22.Rc2 Nb4 23.Rd2 e5 24.Ba3 ed4 25.ed4 Bf5 26.Re1 Bf4 27.Rde2 Nd3 28.Re8 Re8 29.Re8 Kc7 30.Nd5 Kb7 31.a6 1–0. gtate (1655) – caffine, net–chess.com, 2001.

4.c3 e6 5.cb4 Bb4 6.Bb2 Nf6 7.a3 (7.e3 0-0+–) 7...Bc5 (7...Bd6 8.e3+–) 8.d4 Bb6 (8...Bd6 9.e3+–) 9.Nc3 a6 10.e3 ab5 11.Bb5 Bd7 12.Bd7 (12.a4 0-0+–) 12...Qd7 (12...Nd7 13.0-0+–) 13.0-0 0-0 14.Ne5 Qd8 15.f4 (15.Na4 Ra6+–) 15...c6 16.a4 Ba5 17.Qd3 Re8 18.Ra2 Qd6 (18...Qc7 19.Qc2+–) 19.Ba3 Qc7 20.Ne2 (20.Rc1 Bc3 21.Qc3 Ra6+–) 20...Ra7 (20...Ne4 21.Rc1+–) 21.g4 (21.Ng3 g6+–) 21...Rea8 (21...Ne4 22.g5 f6 23.Ng4+–) 22.Rfa1 (better 22.f5!? ef5 23.Qf5 h6+–) 22...Ne4 23.g5 f6 24.gf6 (24.Nf3 Bb6+–) 24...gf6 25.Ng4?? (better 25.Nf3 Bb6 26.Ng3 Ng3 27.hg3 Ra4 28.Bd6 Ra2 29.Ra2+–) 25...f5?? (better 25...Qg7 26.Ng3 Qg4=) 26.Nf2 (better 26.Ne5!? Kh8 27.Ng3 Rg8+–) 26...Qg7 27.Kf1 Bd8 (27...Qh6 28.Ne4 fe4 29.Qb3 Qh2 30.Ng1+–) 28.Bb4 (28.Ne4 fe4 29.Qb3 Kh8+–) 28...Bh4 (28...Qh6 29.Ne4 fe4 30.Qb3 Qh2 31.Ng1+–) 29.Ne4 de4 (29...fe4 30.Qb3+–) 30.Qd2 (30.Qb3 Kf7 31.Ng3 Bg3 32.hg3 Qg3+–) 30...Bf6 (30...Qg4 31.Ng1 Kf7 32.Qe2+–) 31.Kf2 (31.a5 Qg4+–) 31...Kh8 (31...Bh4 32.Ng3+–) 32.Rg1 (better 32.a5+–) 32...Bh4? (32...Qh6 33.Qb2 Qh2 34.Ke1 b5+–) 33.Kf1 Qh6 34.Bd6 (34.d5 cd5 35.Bc3 e5 36.Qd5 Bf6 37.fe5 Qh3 38.Ke1 Qh4 39.Rg3 Bg7+–) 34...Bf6 35.Ng3 (35.Nc3 b6+–) 35...Qh3 (35...Ra4 36.Ra4 Ra4 37.Rg2+–) 36.Qg2 Qg4 37.Ne2 Qh4? (37...Qg2 38.Kg2 Ra4 39.Ra4 Ra4+–) 38.Be5 Rg8 (38...b5 39.Qg3 Qh6+–) 39.Bf6 (39.Qg8) 39...Qf6 40.Qg8 1–0. Jeremicius,Sarunas – Peseckis,Herkus, GM Algimantas Butnorius, 2016.

4.d3 Bg4 5.Nbd2 Nf6 6.e4 e6 7.Bb2 Bb4 8.c3 Ba5 9.Qa4 b6 10.e5 Nfd7?? (Better is 10...Bf3 11.Nf3 Nfd7+=) 11.Qg4+– 0-0 12.d4 c6 13.Bd3 c5 14.Bh7! Kh8 (14...Kh7 15.Ng5) 15.Qh5 g6 (15...Re8+–) 16.Bg6 (16...Kg7 17.Qh7) 1–0. arkadeles – paintgod, ChessWorld.net, 2003. 4.e3 Nf6 5.Bb2 (--> 1.b4 d5 2.Bb2 Nc6 3.b5 Nb8 4.e3 Nf6 5.Nf3).

4.e3 Nf6 5.Be2 Bg4 6.0-0 =.

4.e3 Nf6 5.Bb2 Bg4 6.c4 Nbd7 7.cd5 Nd5 8.Be2 e5 (8...e6!?=) 9.Ne5+/– Bf5 10.0-0 f6 (10...Ne5 11.Be5 Nb4 12.Nc3+/–) 11.Nf3 Bc5 12.Qb3 N7b6 13.Rc1 Qd6 (13...Bd6 14.Nd4 Bg6 15.Bf3+/–) 14.Nh4+– Be6 (14...Bg6 15.h3 Bb4 16.Ng6 hg6 17.Qc2+–) 15.Rc5! Qc5 16.Ba3 Nb4?? (16...Nf4 17.ef4 Bb3 18.Bc5 Bc4+–) 17.Qe6 Kd8 18.Nc3 (better is 18.Qb3!? N6d5 19.Nc3 a5 20.ba6 Qa5 21.Nd5 Nd5+–) 18...a5 19.ba6! Ra6 20.Ba6 Qa5 21.Bb4 Qb4 22.Rb1 Qh4 23.Rb6 Re8 24.Rd6! cd6 25.Qd6 Kc8 26.Nb5 ba6 27.Qc7# 1–0. Kupec,Jan (2305) – Heineccius,August, remoteschach.de, 2010.

4.a3 Na6 5.d3 (5.e4 de4 6.Ne4 Qd5+=) 5...e6 6.e4 Qf6 (better is 6...d4 7.Ne2 c5+=) 7.Bg5?? (better is 7.d4=) 7...Qc3–+ 8.Nd2 (8.Bd2 Qb2 9.e5–+) 8...Ba3 9.Be2 Bb2 10.Ra6 (10.Rb1 f6 11.Bf4 e5–+) 10...ba6 11.0-0 h6 12.Nb1 Qe5 13.Bd2 de4 14.de4 Nf6 15.Nc3 (15.Bd3–+) 15...Bc3 16.f4 (16.Bc3 Qc3 17.Bd3–+) 16...Qd4 17.Be3 Qe3 18.Rf2 Ne4 19.h3 Qf2 20.Kh2 Qf4 21.g3 (21.Kg1 Qe3 22.Kh1 Nf2 23.Kg1 Nd1 24.Kh2 Be5 25.Kh1 Nf2 26.Kg1 Nh3 27.Kf1 Qf2) 21...Qf2 22.Kh1 Ng3 0–1. jmcauley (1810) – chessnaif (2425), net–chess.com, 2013. (=1.Nf3 d5 2.b4 Nc6)

4.a3 Nc6 5.d4 –/+.

4.Ba3 a5 5.Rb1 (5.e3 Bg4–/+) 5...e6 (5...e5 6.e4 Na2 7.Bf8 Nc3 8.dc3 Kf8 9.Bc4–/+) 6.e3 (better is 6.Bb2–/+) 6...Nc2?? (better is 6...Na2 7.Bf8 Nc3–+) 7.Qc2+– Ba3 8.Bb5?? (better is 8.Qa4 Bd7 9.Qa3+–) 8...c6–+ 9.Ne5? (better is 9.Be2–+) 9...cb5 10.Nb5 Bd6 11.g4 (11.Nd6 Qd6 12.Qa4 Ke7–+) 11...Ne7 (better is 11...Be5 12.d4 Bb8–+) 12.f4 (12.Nd6 Qd6 13.d4 a4–+) 12...0-0 13.Nd6 Qd6 14.g5 Ng6 (better is 14...d4 15.e4–+) 15.d3 (15.Ng6 fg6 16.Qb2–+) 15...Ne5 16.Qc3 (16.fe5 Qe5 17.Qf2 d4–+) 16...Nf3 17.Ke2 d4 18.Qc4 Ne5! 19.Qd4 (19.fe5 Qe5 Double attack (19...f6 Decoy)) 19...Qd4 (19...Qc6 20.e4 Qc2 21.Ke3 Ng4 22.Kf3–+) 20.ed4 Nc6 21.a3 (21.Rhc1 Nd4 22.Ke3 Rd8–+) 21...Nd4 22.Ke3 Nc2 (better is 22...Rd8 23.Rhc1–+) 23.Kf3 (23.Kd2 Na3 24.Rb3–+) 23...Na3 24.Rbe1 (24.Rb6 Bd7 25.Rc1 Bc6 26.Ke3 Nb5–+) 24...b6 (better is 24...b5 25.Ke2–+) 25.Re5 (25.Ke2 Bb7 26.Rhf1 b5–+) 25...Bb7 26.Kg3 Bh1 27.d4 Bd5 28.h4 Nc4 (better is 28...Nc2 29.Re2 Rfc8 30.Rd2–+) 29.h5 Ne5 30.fe5 a4 31.g6 fg6 32.hg6 (32.Kg4 gh5 33.Kh3 Rf3 34.Kg2 a3 35.Kg1 a2 36.Kh2 a1Q 37.Kg2 Ra2) 32...hg6 33.Kh3 a3 34.Kg4 (34.Kg3 Rf3 35.Kh4 a2 36.Kg5 a1Q 37.Kg6 Qg1 38.Kh5 Rh3) 34...a2 35.Kg5 (35.Kh4 a1Q 36.Kg4 Qd4 37.Kg5 Rf5 38.Kg6 Qg4) 35...a1Q 36.Kg4 (36.Kg6 Qg1 37.Kh5 Bf3 38.Kh4 Qg4) 36...Rf5 37.Kh3 (37.Kh4 Qg1 38.Kh3 Rh5) 37...Ra3 38.Kg4 Qd4 0–1. Souquiere,Florence – Willoughby,Peter, FICGS, 2007. (=1.Nf3 d5 2.b4 Nc6 3.Nc3 Nb4)

4.Rb1 e6 +=.

3.a3 a5 4.ba5 e5 (4...Nf6 A) 5.e3 e5 (5...Nbd7 6.d4 e5 7.de5 Ne5=) 6.Nc3 Ra5 7.Nb5 Qb6=+; B) 5.Nc3 Ra5 (5...e5 6.Nb5 Qc6 7.e3 Nfd7=) 6.e3 e5 7.Nb5 Qb6=+; C) 5.d4 g6 (5...Ne4 6.e3 Qg6 7.c4 dc4=) 6.e3 Bg7 7.Bb5 c6=+; 4...Nd7 A) 5.Nc3 Ra5 (5...Ngf6 6.a4 e5 7.Ba3 Qc6=+) 6.a4 e5 7.Ba3 Qf6=+; B) 5.e3 e5 (5...Ngf6 6.d4 e5 7.de5 Ne5=) 6.Nc3 Ra5 7.Nb5 Qc6=+; C) 5.d4 e5 (5...Ngf6 6.e3 e5 7.de5 Ne5=) 6.de5 Ne5 7.Nbd2 Ra5=+) 5.Bb2 (5.Nc3 Ra5 (5...Nf6 6.Nb5 Qd7 7.e3 e4=+) 6.e3 c6 7.a4 Qc7=+; 5.e3 Nf6 (5...Nd7 6.Nc3 Ra5 7.Nb5 Qc6=+) 6.Bb2 Nbd7 7.Nc3 c6=+) 5...Nc6 (5...Nd7 6.a4 Ngf6 7.e3 Ra5=+) 6.e3 Ra5 (6...Bg4 7.Be2 Ra5=+) 7.c4 (7.Bc3 Ra8=) 7...d4 (7...dc4–/+) 8.d3 Nf6 9.Nbd2 de3 10.fe3 Ng4 11.Nb3 Ra6 (worse 11...Ne3 12.Qe2 Nb4 13.Na5 (13.ab4?! Qb4 14.Nfd2 Nc2 15.Kd1 Na1 16.Ba1 Ra3 17.Qe5 Be6=) 13...Nbc2 14.Kd2+–) 12.e4 f5 (12...Be7!?=+) 13.ef5= Bf5 14.Qe2 Be7 15.h3 Nf6 16.Ne5 0-0 17.g4 (better 17.Nc6!? Qc6 18.Nd4= (worse 18.Qe7 Re8 19.Qe8 Qe8 20.Kd2 Ne4 21.de4 Qe4–+)) 17...Ne4–/+ 18.gf5 Ng3?? (better 18...Bh4 19.Kd1 Nf2 20.Kc2 Nh1 21.Nc6 Rf5+– (worse 21...Qc6 22.Bg2 Ng3 23.Bc6 Ne2 24.Bb7+–)) 19.Qg4?? (better 19.c5 Qh6 20.Ng4+–) 19...Ne5–+ 20.Qg3 Bh4!! 21.Rg1 (21.Qh4 Nf3 Double attack (21...Nf3 Decoy)) 21...Nd3 (better 21...Nf3 22.Kd1 Bg3 23.Rg2–+) 22.Bd3 (22.Kd2 Bg3 (22...Qg3?! 23.Rg3 Nb2 24.Rf3=+; worse 22...Nb2 23.Qd6 Rd6 24.Kc2–/+) 23.Bd3 Rd8–+) 22...Bg3 (better 22...Qd3! 23.Nd2 Bg3 24.Rg3 Qg3 25.Kd1 Rd6–+) 23.Kd2 Rd8 24.Nc1 (24.Nd4 c5 25.Be4 Qf4 26.Kd3 Rb6–+) 24...Rb6 (better 24...Qb6 25.Bc3 Qg1 26.Ne2–+) 25.Kc2 (25.Bc3 Be5 26.Be5 Qe5–+) 25…Rb2! (25...Rb2 26.Kb2 Be5 27.Ka2 Ra8–+) 0–1. Okon,Dariusz (2200) – Vysochin,Spartak (2550), XXVI Miedzynarodowy Turniej im. Tadeusza Gniota, 2011. (=1.Nf3 d5 2.b4 Qd6 3.a3 a5)

3.a3 a5 4.Bb2 A) 4...f6 A1) 5.Nc3 e5 (5...ab4 6.ab4 Ra1 7.Qa1 Na6=) 6.e4 d4 7.Nd5 Nd7=+; A2) 5.e3 ab4 6.ab4 Ra1 7.Ba1 Qb4=+; A3) 5.b5 Bg4 (5...e6 6.d4 Nd7 7.e3 Ne7=) 6.e3 Nh6 7.h3 Bh5=; B) 4...ab4 B1) 5.Be5 Qd8 (5...Qd7 6.ab4 Ra1 7.Ba1 f6=+) 6.ab4 Ra1 7.Ba1 Nf6=+; B2) 5.e3 f6 (5...Nd7 6.ab4 Ra1 7.Ba1 Qb4=+) 6.ab4 Ra1 7.Ba1 Qb4=+; B3) 5.ab4 Ra1 6.Ba1 Nd7 7.Nc3 e5=; C) 4...Nf6 C1) 5.e3 ab4 (5...Nbd7 6.Nc3 c6 7.b5 e5=) 6.ab4 Ra1 7.Ba1 Nbd7=+; C2) 5.Nc3 c6 (5...e5 6.e3 e4 7.Nd4 ab4=+) 6.Na4 Nbd7 7.b5 e5=+; C3) 5.Be5 Qd8 (5...Qd7 6.b5 Qd8 7.b6 cb6=) 6.Nc3 e6 7.Nb5 Bd6=+.

3.a3 a5 4.b5 A) 4...Nf6 A1) 5.e3 e5 (5...e6 6.d4 Be7 7.Bd3 Nbd7=) 6.Bb2 Nbd7 7.Be2 Be7=+; A2) 5.Bb2 Nbd7 (5...e6 6.e3 a4 7.Be2 Be7=) 6.d4 g6 7.c4 dc4=; A3) 5.d4 a4 (5...Ne4 6.c4 dc4 7.e3 Qg6=) 6.e3 Bf5 7.c4 e6=; B) 4...a4 B1) 5.Nc3 e5 (5...Nf6 6.d4 Bf5 7.Nh4 g6=) 6.b6 c6 7.e4 d4=+; B2) 5.Bb2 e6 (5...Nd7 6.d4 Qg6 7.Nbd2 Ngf6=) 6.e3 Nf6 7.Be2 Be7=; B3) 5.d4 Nf6 (5...Nd7 6.c4 dc4 7.e4 e5=) 6.e3 Bg4 7.Bd3 Nbd7=; C) 4...e5 C1) 5.Bb2 Nd7 (5...e4 6.Nd4 Qb6 7.Ra2 a4=) 6.d3 Ngf6 7.e3 Qe6=+; C2) 5.Nc3 Nd7 (5...Be7 6.e4 Nf6 7.d4 Ne4=+) 6.d4 e4 7.Ng5 Nb6=+; C3) 5.d3 Nf6 (5...Nd7 6.e3 Ngf6 7.Be2 Be7=+) 6.e3 Bg4 7.Be2 Be7=+.

3.a3 a5 4.e3 A) 4...Nd7 A1) 5.Bb2 ab4 (5...Ngf6 6.Nc3 c6 7.b5 e5=) 6.ab4 Ra1 7.Ba1 Qb4=+; A2) 5.b5 e5 (5...Ngf6 6.d4 a4 7.Nbd2 Ne4=) 6.Bb2 Be7 7.Be2 Ngf6=+; A3) 5.Nc3 ab4 (5...e5 6.Bb2 c6 7.b5 Be7=+) 6.Nb5 Qb6 7.Bb2 ba3=+; B) 4...Nf6 B1) 5.b5 e5 (5...Bg4 6.d4 e6 7.Bd3 Be7=) 6.Bb2 Nbd7 7.Be2 Be7=+; B2) 5.ba5 e5 (5...Ra5 6.d4 Nc6 7.Bd2 Ra8=) 6.Nc3 c6 7.d4 e4=+; B3) 5.Bb2 ab4 (5...Nbd7 6.Nc3 c6 7.b5 e5=) 6.ab4 Ra1 7.Ba1 Nbd7=+; C) 4...ab4 5.Bb2 f6 (5...Nd7 6.ab4 Ra1 7.Ba1 Qb4=+) 6.ab4 Ra1 7.Ba1 Qb4=+.

3.a3 Nc6 4.Bb2 Nb4 5.Be5 Qa6 6.ab4 Qb5 7.e4 de4 8.Bb5 1–0. wesolyPolak (1655) – eric41, GameColony.com, 2002.

3.a3 Nd7 4.d4 e5 5.de5 Ne5 6.Bb2 (6.Nc3 c6=) 6...Nf3 7.gf3 (7.ef3 Qe7 8.Be2 Qg5=) 7...Bf5 (7...a5 8.b5+=) 8.Nc3 Nf6 (8...c6 9.e4 Qe7 10.Qe2=) 9.e3 (9.Nb5 Qb6 10.e3 a6 11.Bf6 ab5=) 9...Qd7 (9...a6 10.Ne2+=) 10.Nd5 (10.Rg1 a5=) 10...Nd5+= 11.e4 Nf4 12.ef5 (12.Qc1 Qd6 13.ef5 0-0-0+=) 12...Qf5 (12...Qe7 13.Kd2 0-0-0 14.Bd3–/+) 13.Bd3 (13.Qd4 a5 (worse is 13...Qc2 14.Rc1 Qf5 15.Rc7+/–) 14.Qe3 Ne6=) 13...Nd3 (13...Qe6!? 14.Kd2 0-0-0–/+) 14.Qd3+= Qd3 15.cd3 Kd7 (15...a5 16.ba5 Ra5 17.Rg1+=) 16.Rg1 f6 (16...Rg8 17.h3+=) 17.0-0-0 (17.Kd2 a5 18.b5 Rg8+=) 17...a5 18.b5 Re8 (18...a4 19.Rg4+=) 19.a4 (19.Kc2 Re6+=) 19...Re2 (19...Rg8 20.Rg2+=) 20.Rd2 Rd2 (20...Re6 21.Bc3+=) 21.Kd2= Bb4 22.Bc3 Bc3+= 23.Kc3 g6 24.f4 Re8 25.Rg3 Re2+= 26.Rh3 h5–/+ 27.f3 Ra2 28.Kb3 Rg2 29.Kc3 Ke6–/+ 30.Rh4? Kf5–+ 31.d4 Rf2 (31...Rf2 32.Rh3 Kf4 33.Rh4 Kf5–+; 31...Re2 32.Rh3–+) 0–1. mic (2195) – diggitus (2355), net–chess.com, 2007.

3.a3 f6 4.d4 Bg4 5.Bb2 Nd7 6.Nbd2 e5 7.de5 Ne5 8.Ne5 fe5 9.c4 d4 10.h3 Bf5 11.g4 Bg6 12.Bg2 c6 13.Ne4 Be4 14.Be4 Nf6 15.Bg2 Be7 16.Qd3 0-0 17.e3 Rae8 18.ed4 ed4 19.0-0 (19.Qd4 Qd4 20.Bd4 Bc5 21.Be3 Be3 22.fe3 Re3 23.Kd2 Rg3–/+; 19.Bd4 c5 20.bc5 Qd4 21.Qd4 Bc5 22.Qe3 Be3 23.fe3 Re3 24.Kd2 Re7+=) 19...Bd8 20.Qd4 Bc7 21.Qd6 Bd6 22.Rfe1 Re1 23.Re1 Re8 24.Re8 Ne8 25.b5 cb5 26.cb5 b6 27.Bd5 Kf8 28.Kg2 Bc5 29.f4 Nd6 30.a4 Nc8 31.Kf3 Nd6 32.Be5 Ba3 33.f5 Bb4 34.h4 Ba3 35.h5 h6 36.f6 gf6 37.Bf6 Bc1 38.Bd8 Ke8 39.Bh4 Kd7 40.Bf2 Bb2 41.Be3 Bg7 42.Be4 Nf7 43.Bg6 Ne5 44.Kf4 Nc4 45.Bc1 Ke7 46.Bd3 Ne5 47.Be2 Nf7 48.Ke4 Bf6 49.Kd5 Kd7 50.Bf4 Bd8 51.Bd3 1–0. Schmitt,Adolf – Schoepsdau,Dietmar, Saarland–ch Germany, 1992.

3.a3 Nf6 4.e3 Bf5 5.Bb2 Nbd7 6.d4 h6 7.Nbd2 Ne4 8.c4 c6 9.c5 Qc7 10.Ne4 Be4 11.Nd2 Bg6 12.Be2 e6 13.0-0 Be7 14.f4 0-0 15.Qe1 b6 16.Qg3 Bf6 17.cb6 ab6 18.Nf3 Bh7 19.Ne5 c5 20.dc5 bc5 21.Rfc1 Qb7 22.b5 Rfc8 23.a4 c4 24.Bd4 Nc5 25.Bc5 Rc5 26.Qe1 Be4 27.Qc3 Bg2?? 28.Qd4+/– Be5 29.fe5 Qe7 30.Kg2 Qg5 31.Kf3 Rc7 32.b6 (32...Rb7 33.e4+/–) 1–0. Grosmelder,Karl – Kozlov,Valery, 1999.

3.Ba3 a6 4.e3 b5 5.c3 e5 6.Bb2 Bb7 7.a4 c6 8.d4 e4 9.Nfd2 Qg6 10.Nb3 Nd7 11.N1d2 Be7 12.ab5 ab5 13.Ra8 Ba8 14.Qa1 Nb6 15.g3 Qd6 16.Bh3 Qc7 17.0-0 Nf6 18.f3 ef3 19.Rf3 0-0 20.Nc5 Bc5 21.bc5 Na4 22.Bf5 Qe7 23.Ba3 Bb7 24.Bb4 Bc8 25.Bc8 Rc8 26.Qb1 Re8 27.h3 h6 28.Kg2 Nh7 29.g4 Ng5 30.Rg3 Ne4 31.Ne4 Qe4 32.Qe4 Re4 33.Kf2 Nb2 34.Ke2 Nc4 35.Rf3 f6 (36.Kf2 Kf7–/+) 0–1. Steinmann,Joachim – Rohde,Friedrich, corr 3GMM–F, 2001.

3.Ba3 b5 4.Nc3= c6 5.e4 d4 (5...a5 6.e5 Qg6 7.Nd4=) 6.e5+= Qd8 (6...Qd7 7.Ne2+=) 7.Ne2+/– d3 8.Ned4 dc2 (8...g5 9.e6 (< 9.cd3 g4=+; 9.Bd3?! g4=) 9...Nh6 10.Bb2+/– (< 10.cd3 g4=+)) 9.Qc2 (9.Nc2?! a5+=) 9...Qd5? (better is 9...Bb7!?+/–) 10.Bb5!+– Bb7 (10...cb5 11.Qc8) 11.Bc4 Qd8 12.Bf7! Kf7 13.Qf5 Nf6 14.ef6 gf6 (14...Qd5 15.Ne5 Ke8+–) 15.Ne5 Kg8 16.Qe6 Kg7 17.Nf5# 1–0. Pagni,Carlo – Manninen,Juha, corr ICCF tt, 1990.

3.Ba3 Qb6 4.Nc3 e6 5.e3 =.

3.Ba3 c6 4.b5 Qc7 5.e3 (5.Nc3 Nf6=) 5...Nf6 (5...a6 6.bc6 b5 7.Bd3 Nc6 8.Nc3=) 6.c4 Bg4 7.Nc3 e6 8.Bf8 Rf8 0–1. Janota,J (1800) – Flazinski,Pawel (1800), OCC, 2002.

3.Ba3 Nf6 4.b5 c5 5.bc6 Qc6 6.Bb2 =.

3.Ba3 Bg4 4.d4 (4.b5 Qb6=) 4...Bf3 (4...Nd7 5.h3 Bf5 6.b5=) 5.ef3 c6 (5...Nf6 6.Bb5 Nc6 7.Be2=) 6.Bd3+= b5 (6...Nf6 7.0-0+=) 7.0-0 Nf6 8.c3 (8.Re1 e6+=) 8...Nbd7 9.Re1 (9.Bc1 Nb6+=) 9...e6 10.Nd2 (10.g3 Nb6+=) 10...a5 11.Nb3 (11.g3 Be7=) 11...a4 (11...Qc7 12.g3= (12.Na5? Ra5 13.ba5 Ba3–+)) 12.Nc5 (12.Nd2 Qc7=) 12...Qc7 13.Qe2 (13.g3 Bd6+=) 13...Bd6= 14.g3 0-0 (14...Nb6 15.Bc1=) 15.Nd7 (15.Bc1 Rfe8=) 15...Nd7 16.f4 (16.Qc2 h6=) 16...Rfe8 (16...g6 17.Bc1=) 17.Qc2 (17.Rad1 g6=) 17...Nf8 (17...g6 18.h4=) 18.Re2 Re7 (18...g6 19.Rae1=) 19.Rae1 (19.Rd1 g6=) 19...Rae8 20.Bc1 (20.Kg2 g6=) 20...g6 21.Kg2 (21.h4 h5=) 21...Nd7 22.h4 (22.Bb2 Kg7=) 22...Nf6 23.f3 (23.Bb2 Kg7=) 23...Nh5 (23...Kg7 24.Ba3=) 24.Re5 (24.a3 Nf6=) 24...f5 (24...Be5!? 25.de5 Ng7=) 25.R5e2 (25.R5e3 Kg7+=) 25…Kf7 ½–½. Schumacher,Dirk – Witkowski,Rainer, Neubrandenburg II–Warnemuende, 2001.

3.b5 a6 4.e3 ab5 5.Bb5 Nd7 (5...c6 6.Be2+=) 6.0-0 c6 7.Be2 Ngf6 (7...e5 8.Bb2=) 8.d4 (8.a4 Qc7=) 8...e5 9.c4 dc4 10.Bc4 b5 11.Bb3 Be7 (11...ed4 12.ed4 Be7 13.Re1=) 12.Bb2 ed4 13.Qd4 0-0 (13...Nc5 14.Bc2=) 14.Rd1 (14.Qd6 Bd6 15.Rd1 Be7=) 14...Qb8 15.Bc2 Rd8 16.Nbd2 (16.Qc3 c5=) 16...Bb7 (16...c5 17.Qh4 h6 18.Ne4=) 17.a4 (17.Qh4 h6=) 17...b4 (17...ba4 18.Ra4 c5 19.Ra8 Ba8 20.Qc3=) 18.Qh4+= h6 19.Ne4 Nd5 20.Qh3 (20.Qg4 N5f6 21.Qf5 c5=) 20...Qc7 21.Nh4 N7f6 22.Nf5 Ne4 23.Bg7 Bg5 24.Be4 Nf6 25.Bf6 Bf6 26.Qh6 Be5 27.f4 Bc3 28.Rd4! Bd4 29.ed4 f6 30.Qg6 Kf8 31.Re1 Rd4 32.Qf6 Qf7 33.Qh8 Qg8 34.Qh6 Ke8 35.Bd5 Re4 36.Re4 (36.Re4 Qe6 37.Qe6 Kd8 38.Qd6 Kc8 39.Re8#) 1–0. Malmstroem,Jan (1915) – Werner,Peter, TE.2004.P.01711, 2004.

3.b5 Bg4 4.e3 (4.Bb2 Nd7=) 4...Nd7 5.Be2 Ngf6 6.d4 Bf3 7.Bf3 e6 (7...Qb4 8.Nd2=) 8.Ba3 (8.c4 Qb4 9.Bd2 Qb2+=) 8...Qb6= 9.Bf8 Nf8 10.a4 N8d7 11.0-0 0-0 (11...a6 12.ba6 Qa6 13.Nd2=) 12.Nd2 (12.c4 a6 13.a5 Qd6+=) 12...c6 (12...e5 13.de5 Ne5 14.Nb3=) 13.c4+= Rfc8 14.a5 Qd8 15.Qa4 Nb8 16.c5 cb5 17.Qb5 Rc7 (17...Nc6 18.Be2=) 18.Rfb1+= a6 19.Qa4 Nc6 20.Rb2 Qd7 21.Be2 Re8 22.f4 Nd8 (22...Qe7 23.Rab1+=) 23.Qd7+/– Nd7 24.Nf3 (24.Rab1 Nb8+/–) 24...f6 25.Kf2 (25.Rab1 e5+/–) 25...Nb8 (25...Nc6 26.Bd3+=) 26.Rb6 (26.Bd3 Ndc6+/–) 26...Nbc6 27.Bd1 Ree7 28.Bb3 g6 29.g4 Kg7 30.h4 ½–½. Garbacki – Rosinski, corr 1. AMM Poland, 1991.

3.c3 e6 4.g3 (4.d4 Nd7=) 4...e5+= 5.Bg2 e4 6.Nd4 c6 (better is 6...Nc6 7.Nb5 Qd7=) 7.c4 (better is 7.d3 Qg6 8.de4 de4 9.Bf4=) 7...Qb4–/+ 8.Qc2 (better is 8.Qb3–/+) 8...g6?? (better is 8...b5!?–+) 9.Ba3 (better is 9.cd5!? Qd4 10.Bb2+=) 9...Qb6 (9...Qc4!? 10.Qc4 dc4 11.Bf8 Kf8 12.Be4 Nf6+=) 10.Bb2= Bf5?? (better is 10...Nf6 11.cd5 Bg7+=) 11.Nf5+– (11.Nf5 f6 12.Ne3+–) 1–0. Cutigni – Berlanda, Kuwait, 1981.

3.Nc3= c6 4.Rb1 e5 5.e3 Nf6 6.d4 Nbd7 7.Be2 (7.de5 Ne5 8.Nd4 Bg4=+) 7...Be7 (7...e4 8.Nd2=+) 8.0-0 (8.de5 Ne5 9.0-0 Nfg4 10.Ne5 Qe5 11.Bg4 Bd6= (11...Qc3 12.Bc8 Rc8 13.Bb2 Qb4 14.Bg7+–)) 8...0-0 9.de5 Ne5 10.Ne5 Qe5 11.Qd4 Qd6 (11...Qd4 12.ed4 Bf5 13.Rb2=+) 12.h3 b6 13.Rd1 Rd8 (13...Bf5 14.Bd3 Bd3 15.cd3=+) 14.Bf3 (14.b5!?=) 14...Bf5=+ 15.Qd2 Qe6 16.Ne2 (16.b5 Ne4 17.Qd4 Bf6 18.Be4 Bd4 (18...de4?! 19.Qb4–+) 19.Bf5 Qf5 20.Rd4 Qc2–+) 16...Ne4–/+ 17.Qe1 (17.Qd4!?–/+) 17...Ng5–+ 18.Bh5 Qh6 19.e4 Be4 20.Ng3 Bd6 21.h4 Bg3–/+ 22.Bg5 Qh5 23.Bd8 Bd6 24.f3=+ Qe5 25.fe4+= Qh2 26.Kf1 Rd8 27.Rb3? Qh1–+ 28.Kf2 Qh4 29.g3 Qh2 30.Kf3 Qh5 31.Kg2 de4 32.Re3 f5 33.Qf1 Qg5 34.Qc4 Kh8 35.Ra3 h6 36.Qc6–/+ Qe7 (37.c4 Kh7=+) 0–1. Szollosi,Laszlo Jr (2320) – Sziva,Erika (2245), Cansys IM Budapest, 1991.

3.Nc3 e6 4.d3 (4.a3 Nf6=) 4...Qb4 5.a3?? (better is 5.Bd2+=) 5...Qc3–+ 6.Bd2 Qb2 7.g4 (7.Qc1 Qc1 8.Bc1 Bd6–+) 7...Ba3 8.Ra3 (8.c4 Bd6–+) 8...Qa3 9.Bh3 Ne7 10.–0 0-0 11.e4 Nbc6 12.Qe2 Qc5 13.c4 dc4 14.d4 (14.dc4 e5–+) 14...Nd4 15.Nd4 Qd4 16.Be3 (16.Rc1 b5–+) 16...Qe4 17.f3 Qd3 18.Qd3 cd3 19.Bd2 (19.Rd1 Nd5 20.Kf2 a5–+) 19...c5 20.f4 a5 21.Rf3 c4 22.g5 b5 0–1. jmcauley (1825) – chessnaif (2400), net–chess.com, 2013. (=1.Nf3 d5 2.b4 Qd6)

3.c4 c6 4.e3 (4.c5 Qc7=) 4...e5 (4...Qb4 5.cd5 cd5 6.Nc3=+) 5.cd5 (5.Bb2 Nd7=) 5...cd5 6.Nc3 (6.Ba3 Qe6=) 6...Nf6 (6...e4 7.Nd4=) 7.Nb5 (7.Qa4 Nc6 8.b5 Nb8=) 7...Qe7 8.Bb2 (8.a3 Nc6=) 8...Nc6 9.Qa4 Bd7?? (better is 9...d4=) 10.Nc7+– Kd8 11.Na8 e4 12.b5 ef3 13.bc6 Bc6 14.Qa7 Qe4 15.Qb8 Ke7 16.g3 Nd7 17.Qa7 f5 18.Nb6 Nc5 19.Qa3 Kf7 20.Qc3 Ne6 21.Bd3 Qg4 22.h3 Qh5 23.Qe5 Bc5 24.Nd5 Rd8 25.Qe6! (25...Ke6 26.Nf4 Ke7 27.Nh5 Rd3 28.Nf4+–) 1–0. Soszynski,Marek – Clegg, Rhyl (5), 2006.

3.c4 d4 4.Na3 (4.c5 Qd5=) 4...a6 (4...e5 5.c5 Qf6 6.e3=) 5.c5 Qf6 (5...Qd8 6.Nc4=) 6.Bb2+= Nc6 (6...e5!?+=) 7.b5+/– ab5 (7...Ne5 8.Nd4 Ng4 9.f3+/–) 8.Nb5 (8.Nb5 Ra5 9.Nc7 (9.Nfd4?! Rb5 10.Nb5 Qb2 11.Nc7 Kd8=) 9...Kd8 10.Nd5+/–) 1–0. gtate (2520) – diggitus (2215), net–chess.com, 2007.

3.c4 Bg4 4.c5 Qa6 5.Ne5 Bf5 6.Nc3 f6?? (6...Nf6 7.d4 Qe6 8.Bf4+=) 7.e4 (7.Nd5 Kd8 8.Nf7 Kc8 9.Nh8 Qc4+–) 7...de4?? (better is 7...Qe6 8.Qh5 g6 9.ef5 Qe5 (9...gh5? 10.fe6 fe5 11.Nd5+–) 10.Qe2 c6 11.fg6 hg6 12.Qe5 fe5=) 8.Ba6+– ba6 (8...Na6 9.Qe2 Rb8 10.Nc6 bc6 11.Qa6 Rb4 12.Qc6 Kf7 13.Qc7+–) 9.Nc4 (better is 9.Nd5!? Nd7 10.Nc7 Kd8 11.Nf7 Kc7 12.Nh8 Ne5+–) 9...c6 (9...Nc6 10.d3! Rd8 11.Qa4+–) 10.Qh5 g6 11.Qh4 (11.Qe2 Nd7+–) 11...g5 12.Qg3 Nd7 13.Qc7 Nb8 (13...a5 14.Qc6 Rb8 15.Na5 Nh6+–) 14.Qb7 e3 15.Ne3 Bc8 16.Qc8 Kf7 17.Qb7 Bh6 18.Ng4 (better is 18.Qa8 Nd7 19.Qc6 Ne5 20.Qa6 e6+–) 18...f5 19.Nh6 Nh6 20.Qa8 Rc8. ICCFmember – madjack20, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 Qd6)

3.e3 Qb4 4.Ba3 Qa5 5.c4 e6 6.Bf8 Kf8 7.Nc3 Nd7 8.Qb3 Ngf6 9.Be2 Ke7 10.0-0 Rd8 11.d4 Kf8 12.Rfc1 c6 13.Rab1 Nb6 14.c5 Nbd7 15.Na4 Qc7 16.Qb2 Re8 17.h3 Rb8 18.Rc3 e5 19.Ra3 ed4 20.Nd4 Ne4 21.Bf3 Ne5 22.Be2 Bd7 23.Nc3 b6 24.cb6 Rb6 25.Rb3 Nc3 26.Qc3 c5 27.Nb5 Bb5 28.Rb5 Reb8 29.a4 Rb5 30.ab5 f6 31.Rd1 Rd8 32.Qc2 Kg8 33.f4 Ng6 34.Bf3 Ne7 35.Qa2 c4 36.e4 d4 37.Be2 Kh8 38.Qc4 Qf4 39.Bd3 Ng6 40.Rf1 Qb8 41.Ra1 Ne5 42.Qc2 Rg8 43.Qd1 h6 44.Bf1 Qb6 45.Ra6 Qc5 46.Qh5? d3 47.Kh2 Qf2 48.Bd3 Qf4 49.g3 Qf2 (50.Kh1 Nf3 51.Qf3 Qf3 52.Kh2 Qf2 53.Kh1 Rd8–+) 0–1. Guerrini,Donato – Gorbatow,Alexej (2350), Magenta op, 1999.

3.e3 e5 4.Nc3 Bg4 5.Bb2 e4 6.Nb5 Qd8 7.h3 Bh5 (worse is 7...ef3 8.hg4 fg2 9.Bg2+=) 8.g4 Bg6 9.Be5 Na6 10.Nfd4 c6?? (better is 10...Qe7 11.Bf4 Nf6=) 11.Nd6!+– Kd7 (11...Bd6 12.Nf5 Double attack) 12.Nb7 Qb6 13.b5 c5 14.ba6 cd4 15.Rb1 (15.Bd4?! Qc7+–; 15.ed4?! Qb2+–) 15...Qa5 (15...Qe6 16.Bg7! Bg7 17.Nc5 Kd8 18.Ne6 fe6+–) 16.Na5 1–0. usingprogram (2005) – neale, kurnik, 2011.

4.Nc3 b6 5.e4 d4 6.Na4 (6.Ne2 Nf6 7.Ng3 Be7=) 6...Bd7 (6...Qc6 7.Nb2 Qe4 8.Qe2 Qe2 9.Be2+=) 7.Nb2= Be6 (7...b5 8.a4 ba4 9.Nc4=) 8.Bc4 (8.Nc4 Bc4 9.Bc4 Be7+=) 8...f6 (8...Nf6 9.Qe2=) 9.Be6 Qe6 10.d3 g6 11.Nc4 Nh6 12.Bh6 Bh6 13.Nfd2 Nd7 14.Nb3 0-0 15.Qf3 Rf7 (15...a5 16.b5+=) 16.0-0 Raf8 17.g4 (17.a4 a6=) 17...Bf4 18.h3 f5 (18...b5!? 19.Nca5 Qb6+=) 19.ef5 gf5 20.Ncd2?? (20.Nd4 ed4 21.Qf4 fg4 22.Qd4= (22.Qc7? gh3 23.Rfe1 Qd5–+; 22.Qg4?? Rg7 23.f3 Qh6–+)) 20...Nf6?? (better is 20...fg4 21.Qg2 Rg7–+) 21.gf5 Qf5 22.Ne4?? (22.Kh1 Qe6 23.Rg1 Kh8–/+) 22...Kh8 (better is 22...Ne4 23.Kh1 Ng3 24.Kg2 Nf1 25.Kf1 Bg5 26.Qf5 Rf5–+) 23.Kh1–/+ Rg7 (23...Ne4!? 24.de4 Qg6–+) 24.Nf6 Rf6 25.Rg1 Rh6?? (better is 25...Rgg6+=) 26.Rg4 Rg4 0–1. Superyetkin – Taroak, playchess.de, 2005.

4.d3 Nf6 5.g3 Be6 6.Bg2 Be7 7.Ng5 0-0 8.Ne6 fe6 9.c4 c5 10.0-0 Nc6 11.b5 Nd4 12.Nd2 Rf7 13.g4 Ng4 14.e3 Nh2 15.Kh2 e4 16.Kg1 Nf5 17.de4 de4 18.Ne4 Qe5 19.Ra2 Nh4 20.f4 Qf5 21.Nf2 Qg6 22.Qg4 Qg4 23.Ng4 Bd6 24.Be4 Raf8 25.Rh2 g5 26.Nh6 1–0. Salazar,Ignacio – Rodicio,Olalla, Ourense Cidade das Burgas, 1999.

4.e3 e4 5.Nd4 Qg6 6.Bb2 Nf6 7.d3 Be7 8.Ne2 0-0 9.Nf4 Qg5 10.Nd2 Rd8 11.Be2 a5 12.b5 c6 13.a4 cb5 14.ab5 d4 15.0-0 (15.de4? de3 16.fe3 Ne4–/+) 15...de3 16.fe3 Qb5 17.Bf6 Bf6 18.d4 Qc6 19.c4 Bg5 20.Qb1 f5 21.c5 Qh6 22.Nc4 Nc6 23.Nb6 Ra7 24.Qb3 Kh8 25.d5 Nd4 26.Qa2 (26.ed4 Bf4 Deflection) 26...Ne2 27.Qe2 Qf6 28.Ra3 Bd7 29.Nd7 Rd7 30.Qb5 Rf7 31.Ne6 Ra8 32.Rf2 h6 33.g3 Qg6 34.Re2 Re7 35.Ng5 Qg5 36.d6 Rf7 37.Ra5 Raf8 38.Kh1 Qh5 39.Raa2 Rd8 40.Re1 Kh7 41.Rf1 g6 42.Ra7 Rdd7 43.Ra8 Rg7 44.Qc4 Qg5 45.Qe6 Rd8 46.Rd8 Qd8 47.g4 fg4 48.Rf7 (48.Qg4?! b6+=; 48.Qe4?! g3+/–) 48...Qa5 49.Rg7 Kg7 50.Qe5 Kh7 51.Qe7 Kg8 52.Qe4 Qe1 53.Kg2 Qe2 54.Kg3 Qe1 55.Kf4 Qf2 56.Ke5 Qh2 57.Ke6 Qa2 58.Kd7 g3?! 59.Qg6 Kf8 60.Qh6 Kg8 61.Qg5 Kf8 62.Qf4 Kg7 63.Ke7 1–0. Buettner,Fritz – Baer,Werner, CiF, 2004. (=1.Nf3 d5 2.b4 Qd6 3.a3 e5)

4.e3 Be6 5.Bb2 f6 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.Nf3 f6 5.e3 Be6).

4.e3 Be7 5.Bb2 f6 6.Be2 (6.c4 a5=) 6...Be6 7.0-0 Nh6 8.d4 e4 9.Ne1 (9.Nfd2 f5+=) 9...0-0 (9...a5 10.b5=) 10.f3 (10.c4 dc4 11.Nd2 Qc6=) 10...f5 (10...ef3 11.Nf3 Re8 12.Nc3=) 11.Nc3 (11.fe4 fe4 12.Rf8 Bf8=) 11...c6 (11...Nd7 12.Qd2+=) 12.fe4 (12.Qd2 Nd7=) 12...fe4+= 13.Rf8 Kf8 14.b5 Nd7 (14...Bg5 15.Qd2–/+) 15.bc6 (15.a4 Kg8+=) 15...bc6 (15...Qc6 16.Rb1–/+) 16.Bc1 (16.Qd2 Rb8 17.Rb1 Kg8–/+) 16...Kg8 17.a4 (17.Rb1 Rf8–/+) 17...Qc7 (17...Bg5 18.Bd2–/+) 18.Ba3 (18.g3 Nf5–/+) 18...Bg5 19.Bc1 Nf6 (19...Nf5 20.Bg4–/+) 20.g3 Bh3 21.Ng2 Rf8 22.Ba3 Rf7 23.Qd2 Bg2 24.Kg2 Nf5 25.Nd1+= h5 26.Rb1 h4–/+ 27.g4 h3 (27...h3 28.Kg1 Nh6–/+) 0–1. Seack,Ingo – Rosinski,Zenon, corr ICCF–Cup8 V187, 1990.

4.e3 Be7 5.Bb2 Bf6 6.d3 Ne7 7.Be2 0-0 8.Nbd2 a5 9.ba5 c5 (9...Ra5!? 10.c4 Nec6=) 10.c4= e4 11.Bf6 ef3 12.Be7 fg2 13.Rg1 (worse is 13.Bd6 gh1Q 14.Bf1 Rd8 15.Bc5 dc4 (worse is 15...Ra5 16.Bb6 Nc6 17.Bd8 Nd8 18.Qh5+/–; 15...Qh2?! 16.Bb6 Rd7 17.Qf3=) 16.dc4 Qh2–/+ (16...Ra5 17.Bb6+–)) 13...Qe7 14.Rg2 (better is 14.cd5!? Qe5 15.Bf3+=) 14...d4+= 15.ed4 cd4 16.Nb3 Nc6 17.Qd2 Re8 18.Rg3 h5 19.Rg5? (better is 19.Kd1 h4 20.Rg2+=) 19...Bg4–+ 20.Nc1 Ne5 21.Kd1 (21.Re5 Qe5 22.f4–+) 21…Be2 (21...Be2 22.Ne2 Nf3 23.Rg7 Kg7–+) 0–1. Garcia,Jes – Blanco,Cristobal J (2180), Pan American–ch U18, 1998. (=1.Nf3 d5 2.b4 Qd6 3.a3 e5)

4.e3 Bg4 5.Bb2 f6 6.d4 e4 7.h3 Be6 (worse is 7...ef3 8.hg4 fg2 9.Bg2+=) 8.Nfd2 f5 9.c4 c6 10.Nc3 Nf6 11.Rc1 a6 12.Na4 Nbd7 13.cd5 cd5 (13...Qd5 14.Nc4 Bg8 15.Na5+=) 14.Nc5 Rb8 15.b5 Be7 16.Ndb3 ab5 17.Bb5 0-0 18.0-0 b6 19.Ne6 Qe6 20.Rc6 Bd6 21.Qe2 Qe7 22.a4 f4 23.ef4 Bf4 24.Bc1 Bc1 25.Rfc1 Rf7 26.Rc8 Rc8 27.Rc8 Rf8 28.Rc7 Qd6 29.Qc2 h6 30.Nd2 Rf7 31.Nf1 Nf8 32.Rc8 Qb4 33.Qd2 Qd2 34.Nd2 Re7 35.Rb8 Re6 36.Nc4 dc4 37.Bc4 Kf7 38.Rf8!+/– Kf8 39.Be6 Ke7 40.Bb3 Kd6 41.Kf1 Nd5 42.Ke2 Nf4 43.Ke3 Ng2 44.Ke4 g5 45.Kf3 Ne1 46.Kg4 Nd3 47.f3 Nf2 48.Kg3 Nd3 49.Bc4 Ne1 50.f4 Nc2 51.fg5 hg5 52.Ba2 Nd4+= 53.Kg4 Ke5 54.Kg5 Nf3 55.Kg6 Nh4 56.Kh5 Nf3 57.h4 Kf6 58.Bd5 Nd4 59.Bc4 Nf5 60.Bd3 Ne3 61.Kh6 Ng4 62.Kh7 Ne5 63.Be4 Nf7 64.Bd5 Nd6 65.h5 Nf5? 66.Be4+– Ne7 67.h6 Kf7 68.Bc2 Kf6 69.Bd3 Kf7 70.Bb5 Kf6 71.Be8 Nf5 72.Bg6 Ne7 73.Bh5?? Nf5?? 74.Bg4+– Ne7 75.Bd1?? Kf7?? 76.Bb3 Kf6 77.Bc2 Nf5?? 78.Bb1 ½–½. Rogers,Jo (2335) – Rose,M (2275), 4NCL, 2011.

4.e3 Bg4 5.Be2 Nd7 6.Bb2 Be7 7.h3 Bh5 8.b5 c5 9.d3 f5 10.c4 Ngf6 11.cd5 Nd5 12.Nc3 0-0 13.0-0 Bf6 14.Qc2 Ne7 15.Rfd1 Kh8 16.a4 g5 17.Nh2 Bg6 18.Qb3 Bf7 19.Qc2 Rad8 20.Rac1 Bg7 21.Ba3 b6 22.d4 ed4 23.ed4 Bd4 24.Nf3 Qf6 25.Nd4 cd4 26.Rd4 Ne5 27.Rd8 Rd8 28.Be7 Qe7 29.Qf5?? Bg6–+ 30.Nd5 Rd5 31.Rc8?? Kg7 (32.Rg8 Kg8 33.Qc8 Kg7–+) 0–1. Stecyk,Jozef (2015) – Kulczewski,Zygmunt (2090), Poland–chT 2nd div North, 1999.

4.e3 Bg4 5.Be2 Nf6 6.0-0 Nbd7 7.Nc3 c6 8.Bb2 Be7 9.d4 e4 10.Ne5 Be2 (10...Ne5? 11.de5 Qe5 12.Bg4+–) 11.Ne2 0-0 12.c4 Rac8 13.b5 (13.Nf4 Rfd8=) 13...cb5=+ 14.cb5 Nb6 15.Qb3 Nc4 16.Rfc1 Nb2 17.Qb2 Nd7 18.a4 Bf6 19.Nd7 Qd7 20.a5 Rfd8 21.b6 a6 22.Rc8 Rc8 (< 22...Qc8 23.Rc1 Qb8 24.Rc7+/–) 23.Rc1 Be7 24.Rc3 Bf8 25.Qb3+= Rc3 26.Nc3 Qc6 27.Kf1 Qc4 28.Qc4 dc4 29.Nd5 Bd6 30.Ke2 f5 31.Kd2 Kf7 32.h4 Ke6 33.Nc7 Kd7 34.Kc3 Bc7 35.bc7 Kc7 36.Kc4 b5 37.ab6 Kb6 38.f3 ef3 39.gf3+– Kc6 40.e4 fe4 41.fe4 g6 42.e5 a5= 43.d5 Kc7 44.Kb5 h6 45.Ka5?? g5 46.hg5 hg5 47.Kb5 g4 48.d6 Kd7 49.Kc5 g3 50.e6 Ke6 51.Kc6 g2 52.d7 g1Q ½–½. Klemens,Leszek – Cottarelli,Franco, corr ICCF tt, 2003.

4.e3 Bg4 5.Be2 h6 6.0-0 Bf3 7.Bf3 e4 8.Bh5 Qe5 9.c3 g6 10.Bg4 h5 (10...Nd7 11.d4 ed3 12.Qd3=) 11.Bh3 (11.Bc8!? Bd6 12.f4 ef3 13.g3+/–) 11...f5 12.d4 Qd6 13.Nd2 b5 (13...Nf6!?=) 14.a4+= Qc6 15.a5 (better is 15.Bb2!?+=) 15...Qc3+= 16.Ba3 Bb4 17.Bb4 Qb4 18.Qc2 Qe7 19.Rfb1 a6 20.Nf1 Nf6 21.Ng3 0-0 22.Qe2 Nbd7 23.Rc1 Qd6 24.Rcb1 Ng4 25.Bg4 fg4 26.Rc1 c5 27.dc5 Nc5 28.Rab1 Nd3 29.Rc2 (29.Rf1–+) 29...Rf2 30.Qd1 Rc2 31.Ne2 (31.Qc2 Qc5 32.Qc5 Nc5 33.Ne2–+) 31...Rac8 32.g3 g5 33.Kg2 R8c3 34.h3 gh3 35.Kh3 Nf2 36.Kg2 Nd1 37.Rd1 Re2 38.Kh3 Qe6 39.g4 Qg4 0–1. pieeater – dhub noire, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 Qd6 3.a3 e5)

4.Bb2 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.Nf3).

4.Bb2 Nd7 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.Nf3 Nd7).

4.Bb2 f6 5.e3 Be6 (--> 1.b4 d5 2.Bb2 Qd6 3.a3 e5 4.Nf3 f6 5.e3 Be6).

4.d4 a5 5.Ne5 Bf5 6.g4 =.

4.d4 Bf3 5.ef3 Nd7 6.Be2 e5 7.c3 Qg6 8.0-0 Be7 (8...0-0-0 9.Be3 a6 10.Re1+=) 9.Bd3 (9.de5!? Qe6 10.f4+/–) 9...Qf6 10.de5 Ne5 11.Bb5 c6 12.Ba4 b5 13.Bb3 Nh6 14.a4 ba4 15.Ra4 0-0 16.Nd2 Bc5?? (better is 16...Nd3=) 17.bc5+– Nf5 (17...Nd3 18.Ba3+–) 18.f4 (18.Bc2 Nd7+–) 18...Nd3? (18...Nd7 19.Ba3 Qc3 20.Bc2+–) 19.Nf3 (19.Ba3 Nh4 20.g3 Ng6+–) 19...Qc3? (19...Nc5 20.Ra3+–) 20.Ba2 (better is 20.Bd2 Qc5 21.Qb1 Nf2 22.Rf2+– (22.Qf5?! Ne4 23.Kh1 Qb5+=)) 20...Nc1 (better is 20...Nc5 21.Ra3 Qf6+/–) 21.Rc4?? (better is 21.Qc1 Qc1 22.Rc1+–) 21...dc4–+ (21...Na2?! 22.Rc3 Nc3 23.Qd3+=) 22.Ne5?? (22.Qc1 Nd4 23.Qc3 Ne2 24.Kh1 Nc3 25.Bc4–+) 22...Na2 23.g3 Ne3! 24.fe3 Rfd8 25.Qe2 Rd2 26.Qf3 Rad8 27.Qc6 R8d6 28.Qe8 1–0. pieeater – madjack20, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 Qd6)

4.d4 Bf3 5.ef3+= Nd7 6.Be2 Qg6 7.0-0 e6 8.c4 (8.Bd3 Qh5+=) 8...dc4+= 9.Bc4 Bd6 10.Nc3 c6 (10...Ne7 11.Ne4+=) 11.Ne4 Bc7 12.Re1 (12.b5 Ne7+/–) 12...Ne7 (12...Ngf6 13.g3+=) 13.g4 (13.Bd3 Qh5 14.h3 0-0+=) 13...h5 (13...0-0-0!? 14.Bd3 f5=) 14.Bd3+/– f5 15.Ng5 hg4 16.fg4 (worse is 16.Ne6 Bh2 17.Kf1 Ne5+=) 16...Bh2 17.Kg2 Nf8 (17...e5 18.gf5 Qd6 19.Ne6+=) 18.Rh1 (18.gf5 ef5 19.Bc4+/–) 18...0-0-0 19.Rh2 Rh2 20.Kh2 Rd4 21.Be3 Rd5 (21...Rd8 22.Kg1 Qf6 23.Rc1+=) 22.Nh3 (22.Rc1 Qf6 23.Kg1 Neg6+/–) 22...Qf6+/– 23.Rc1 (23.Rb1 fg4 24.Nf4+=) 23...fg4+= 24.Nf4 Qh4? (better is 24...Rd7!? 25.Qb3 g5+=) 25.Kg2+– Rd8 (better is 25...Rd6 26.b5 Nd7 27.bc6 Nc6+–) 26.Qe2?? (better is 26.b5 Nd5 27.Nd5 Rd5 28.bc6+–) 26...e5 (26...g5 27.Rh1 gf4 28.Rh4 (28.Bf4? Qf6 29.Be3 Nf5–+) 28...f3 29.Kf1 fe2 30.Ke2+=) 27.Rh1= ef4 28.Bf4 Qf6+= 29.Qg4 Qe6 30.Be2 Neg6 31.Bg3= Re8 32.Bf3 Qg4+= 33.Bg4 Kd8 34.Rd1 Ke7 35.f4 Rd8 36.f5+= Rd1 37.Bd1 Nh8 38.Be5 Kf7 39.Bb3+/– Ke7 40.Bg7 Nf7 41.Bd4 a6 42.Kf3 Nd7 43.Kf4 b6 44.Bc4 b5 45.Be6 Nd6 46.Bd7 Kd7 47.Kg5 Ne4 48.Kg6 Kd6?? 49.f6+– Nf6 50.Kf6 a5 51.Bc5 (51.Bc5 Kd7 52.Ke5+–) 1–0. Rogers,Jo (2305) – Smallbone,K (2215), 4NCL, 2014. (=1.Nf3 d5 2.b4 Qd6)

4.Ba3! Qb6 5.Bf8 Kf8 6.e3 f6 7.c4 Ne7 8.Nc3 Be6 9.Qb3 c6 10.a4 Nd7 11.a5 Qc7 12.d4 Kf7 –+ 13.c5? e4 14.Nd2 f5 15.g3 g5 16.f3 Nf6 17.fe4 fe4 18.Be2 Qd7 19.Rf1 Kg7 20.0-0-0 Rhf8 21.Qb2 Bh3 22.Rf2 Nf5! 23.Nde4!? de4 24.d5! Ne3 25.Rd2 Ned5 26.Ne4 Qe7 27.Bd3 Bg4 28.h3! Bh5 29.Rf5 h6 30.Re5 Qd7 31.h4 Rae8 32.hg5 hg5? (32...Re5) 33.Rg5 Kf7 34.Nd6 Ke7 35.Bf5 Qc7 36.b6 ab6 37.ab6 Qb8 38.Qe5 Kd8 39.Nf7! 1–0. Schiffler – Roth, Bad Lausick 1951.

4.Bb2 Nd7 5.e3 Ngf6 (5...e4 6.Nd4=) 6.Be2 h6 (6...e4 7.Nd4=) 7.0-0 Be7 8.c4 c6 (8...0-0 9.d4 ed4 10.Bd4=) 9.a4 (9.cd5 cd5 10.Ba3 Qe6+=) 9...0-0 (9...e4 10.Nd4 Nc5 11.Nc3=) 10.d3 (10.cd5 cd5 11.Ba3 Qe6=) 10...c5 (10...dc4!? 11.dc4 Qc7=) 11.cd5+= Nd5 12.Nbd2 f6 (12...Qe6 13.Nc4+=) 13.Qb3+– Kh7 14.Nc4 (14.a5 a6+–) 14...Qe6+= 15.a5 g5 (15...a6 16.b6+=) 16.e4 (16.Nfd2!?+–) 16...Nf4+= 17.Qc2 (17.Rfe1 a6+=) 17...Rg8 18.Rfe1 (18.Rfb1 Nf8=) 18...Nf8= 19.Ne3 (19.Nfd2 Ne2 20.Re2 Ng6=) 19...Bd7 20.Qc4 N8g6 21.Bf1 g4 22.Nd2 h5 23.g3 Nh3 24.Bh3 (24.Kg2 Ng5=) 24...gh3 25.Kf1 Rad8 26.Rad1 Bf8 27.Nf5 (27.Nf3 Bh6=) 27...Ne7 (27...Qe8 28.Qc2–/+) 28.Qe6 (28.Ne3!?=) 28...Be6–/+ 29.Ne7 (29.Ne3 Bd7–/+) 29...Be7 30.Ke2 h4 31.Rg1 (31.Bc3 Bd7–/+) 31...hg3–+ 32.Rg3? (better 32.fg3!? Bg4 33.Nf3–+) 32...Rg3 33.hg3? (33.fg3 c4! 34.Rc1 cd3 35.Ke3–+) 33...Bg4 (better 33...c4 34.a6 ba6 35.ba6 cd3 36.Kf1 Rc8–+) 34.f3–/+ Bd7 35.Rh1 Bb5 (better 35...Kg7!?–/+) 36.Rh3= Kg6 37.Nc4 b6 (37...Bd6 38.Rh1= (worse 38.Nd6 Rd6 39.Bc1 Rd3–/+)) 38.Bc3 (38.ab6 ab6 39.f4 Ra8=) 38...Ba6 (38...Bd7 39.Rh4 b5 40.Ne3=+) 39.ab6 (39.Bd2 Bf8=) 39...ab6=+ 40.f4 (40.Bd2 Bf8=+) 40...b5 41.Ba5?? (better 41.Na5=+) 41...bc4–+ 42.Bd8 cd3 (42...Bd8?! 43.dc4 Bc4 44.Ke3–+) 43.Kd1 Bd8 44.Rh8 Be7 45.fe5 (45.f5 Kf7 46.Rb8–+) 45...fe5 46.Ra8 (46.Re8 Kf7 47.Ra8 Bb7–+) 46...Bc4 47.Ra7 (47.Kc1 Bg5 48.Kb2 d2–+) 47...Bg5 48.Rc7 (48.Rb7–+) 48…Bb3 (48...Bb3 49.Ke1 d2 50.Kf2 d1Q 51.Rd7 Qd7 52.Kg1 Qd2 53.Kh1 Qf2 54.g4 Bf4 55.g5 Qh2) 0–1. Mittelbachert,U (1975) – Kartsev,So (2220), 45th Sparkassen Open, 2017.

5.d4 Ba3!? 6.Na3 e4 –/+.

5.d4 Bd6 6.de5 Be5 7.Ne5 Qe5 8.Nd2 Bf5 9.Rb1 f6 10.Rb3 Kf7 11.g4 (11.c4 dc4 12.Nc4 Qe6+/–) 11...Bc8 (11...Bg4!? 12.Bg2 Qh5=) 12.Bb2 Qd6 13.Rg1 Nd7 14.g5 Nc5 15.Rbg3 f5 16.g6 hg6 17.Rg6 Qg6 18.Rg6 Kg6 19.Nf3 c6 (19...Na4 20.Be5 Nf6+–) 20.Qd4 (better is 20.Ne5 Kh7 21.Nf7+–) 20...Ne6+= 21.Ne5 Kh7 (21...Kf6!? 22.Qd2 d4+/–) 22.Qh4+/– Nh6 23.Bh3 Rf8 24.bc6 bc6 25.Nc6 ½–½. Fantazzini,M – Ludovici,Roberto, Vitinia op 8th, 1996. (=1.Nf3 d5 2.b4 Qd6 3.b5 e5)

5.Bf8 Kf8 6.Nc3 e4 7.Ng1 Ne7 =.

5.Bf8 Kf8 6.d4 e4 7.Ne5 Nd7 (7...Qe7 8.h3 Qb4 9.c3 Qb5 10.Qc2–/+) 8.c4 (8.Nd7 Bd7 9.e3 Ne7=) 8...Ne5 (8...e3 9.Nf3 dc4 10.Qc1=) 9.de5+= Qe5 10.Qd5 Qd5 (10...Qf6 11.a4+=) 11.cd5= Nf6 12.Nc3 Ke7 (12...e3 13.fe3 Bf5 14.Rd1=) 13.e3 Rd8 14.Bc4 Bf5 (14...Kd6 15.Rc1=) 15.Ke2 (15.f3 h5=) 15...Rd6 (15...Rac8 16.Rhd1=) 16.Rhd1 Rad8 17.Rac1 R8d7 (17...Nd7 18.Rd4 Nc5 19.f3 ef3 20.gf3+=) 18.Bb3 (18.h3 Bg6=) 18...Kd8 19.Na4 (19.Rd4=) 19...b6 (19...Kc8!?=) 20.Nc3+= Re7 (20...Kc8 21.h3+=) 21.Rd4+/– Kc8 22.f3 g5 23.Kf2 g4 24.Bc2 gf3 25.gf3 Bg6 26.Be4+– Be4 27.Ne4 Ne4 28.Re4 Re4 29.fe4 Rf6 30.Ke2 Rh6 31.Rh1 Rh4 32.Kd3 Kd7 33.Rf1 Rh2 34.Rf7 Kd6 35.a4 Ra2 36.Rh7 Ra3 37.Kd2 Ra4 38.Rh6 Kd7 39.e5 Rb4 40.Rh7 Kc8 41.e6 Rb5?? 42.Rh8 Kb7 43.e4 (43.e4 Rb4 44.Ke3 Rb3 45.Kf4+–) 1–0. Gonzalez,Lutgarda – Lezcano,P, Equador, 1989. (=1.Nf3 d5 2.b4 Qd6 3.b5 e5)

5.Bf8 Kf8 6.d4 e4 7.Ng1 a6 =.

5.Bf8 Kf8 6.d4 e4 7.Ng1 Ne7 8.e3 g6 (better is 8...a6!?–/+) 9.c4= c6 10.Nc3 Be6 11.Nge2 Kg7 12.Nc1 (better is 12.Nf4+=) 12...Nd7–/+ 13.Nb3 dc4 14.Ne4 Qh4 15.Nbc5 Nc5 16.Nc5 cb5 17.Ne6 fe6 18.Qb1 a6 19.g3 Qf6 20.Bg2 Nd5 21.0-0 Rab8 22.Qb2 Rhc8 23.e4 (23.a4!? c3 24.Qb3+=) 23...Nb6 24.Rad1 Rd8 25.f4 White plans e5 25...Na4 26.Qf2 c3 27.g4 Nb2 28.e5 Qf7 29.Rb1 Rbc8 (better is 29...Nd3 30.Qe3 c2–+) 30.Be4?? (better is 30.Qe3–/+) 30...Rc4–+ 31.f5 (31.Rbc1 b4 32.Rfe1 Rcd4–+) 31...Rcd4 (better is 31...Rdd4!? 32.f6 Kg8 33.Bf3–+) 32.f6 Kf8 33.Qf3 Nc4 34.Bb7 (34.Rbd1–+) 34...Ne5 35.Qe3 (35.Qc3 Qb7 36.Qc5 Kf7 37.h3–+) 35...Qb7 36.Qe5 Rg4 37.Kf2 Qg2 38.Ke3 Qd2 0–1. Vokoun,J (2140) – Tokranovs,Dmitrijs (2170), 26th Czech Rapid G1, 2015. (=1.Nf3 d5 2.b4 Qd6 3.b5 e5)

4.Ba3 Qd7 5.e3 =.

4.e3 Bg4 5.Be2 Bf3 6.Bf3 e5 7.Ba3 Qe6 8.Bf8 Kf8 9.c4 e4 10.cd5 Qe5 11.d4 Qg5 (worse is 11...Qd5 12.Nc3 Qe6 13.Be2+=) 12.Nc3 ef3 13.Qf3 Qg4 14.Qg4 Ng4 15.0-0 (15.Ne4 Ke7=) 15...Ke7 16.e4 f6 (16...Re8 17.Rfc1+=) 17.h3 Nh6 18.Rfc1 Nd7 19.Ne2 Rhc8 20.Nf4 g5 21.Nd3 Nf7 22.a4 a6 23.f3 ab5 24.ab5 Ra1 25.Ra1 Nd6 26.Rb1 Ra8 27.e5 Nf5 28.b6 Nd4 29.ef6 Nf6 30.bc7 Nd5 31.Rb7 Rc8 32.Nb4 Nc7 33.Nd5 Kd6 34.Nf6 h6 35.Rb6 Nc6 36.Kh2 Nd5 37.Nd5 Kd5 38.h4 Rg8 ½–½. Vorisek,Karel – Labuda,J, Czechoslovakia, 1970. (=1.Nf3 d5 2.b4 Qd6)

4.b5 +=.

4.g3 e4 5.Nd4 Nc6 6.Qa4 a5 7.d3 Bd7?? (better is 7...ed3 8.Bf4 Qd7=) 8.Nb5+– Qe5 9.Bf4 Qh5 (9...Qf6 10.Nc7 Kd8 11.b5+–) 10.Nc7 Kd8 11.Na8 Nge7 (11...ab4 12.Qb5 Nf6+–) 12.b5 Nb8 (12...ed3 13.bc6 Nc6 14.Bc7 Ke8 15.Ba5 Bd6+–) 13.Qa5 Ke8 (13...b6 14.Qb6 Ke8 15.Nc7 Kd8 16.Ne6 Ke8 17.Qd8) 14.Nc7 Kd8 15.Ne6 Kc8 (15...Ke8 16.Qd8) 16.Qd8 1–0. David Lonsdale – madjack20, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 Qd6)

4.a3 e5 –/+.

4.b5 c6 –/+.

4.Qc2 –/+.

4.e3 b5 5.a4 c6!? 6.Nc3 Ba6 =.

4.e3 b5 5.a4 Bd7 6.Nc3 (6.ab5!? Bb5 7.Nc3+=) 6...c6+= 7.ab5 cb5 8.Nd4 a6 (better is 8...Qb6!? 9.Qh5 Nf6=) 9.Ncb5!+/– Bb5 (9...ab5 Exploits the pin 10.Ra8 A pinning theme) 10.Nb5 Qc6 11.Nd4 Qc7 12.Be2 (12.Qc2 e6+/–) 12...e5 13.Bf3 Ra7 14.Qa4 Qd7 (14...Kd8 15.Nb5! ab5 16.Qa7 Bb4 17.Qa8+–) 15.Nc6 (better is 15.Nb5 Rb7 16.Nd6 Bd6 17.Bb7+–) 15...Rc7?? (better is 15...Rb7 16.Bb2 f6+/–) 16.Nb8+– Qa4 17.Ra4 Nf6 (17...c3 18.Na6 Rc4 19.Be2 cd2 20.Bd2+–) 18.Na6 Ra7 19.Nc5 (better is 19.Bc6 Kd8 20.b5 Nd7 21.Rc4 Bd6+–) 19...Ra4 20.Bc6 Kd8 21.Ba4 Nd5 22.Ba3 c3 23.Ke2 cd2 24.Kd2 Bd6 25.Rd1 Ke7 26.Kc2 Nb6 27.Bb3 Rc8 28.Kb2 f6 29.Nb7 Bb8 30.b5 Ke8 31.Bc5 Nd7 32.Bb4 h6 33.Bc2 Rc4 34.Bg6# 1–0. Researchonly (1805) – Calponas (1800), echecsemail.com, 2008.

4.e3 b5 5.a4 Nd7 6.Na3 (6.ab5 Qb4 7.Nc3 Qd6+/–) 6...Qf6 7.Nb5 (better is 7.Rb1!? Qg6 8.Bb2 (worse is 8.Nb5 Qb1 9.Nc7 Kd8 10.Na8 Bb7–/+; 8.ab5?! e5+=) 8...ba4 9.Qa4+=) 7...Qa1+= 8.Nc7 Kd8 9.Na8 Bb7 10.Bc4 e6 11.Qc2 (11.0-0 Ba8 12.d4 Bb4+=) 11...Ba8 12.0-0 Qf6 13.Bb2 Qg6 14.Bd3 f5 15.Nh4 Qe8 16.Rc1 Ke7 (16...Bb4?? 17.Bg7 Bd6 18.Bh8+–) 17.Qc7 Ngf6 (17...Bd5!?+/–) 18.Bb5+– Qb8 19.Qb8 Nb8 20.Rc8 (20.Rc8 g5 21.Rc7 Nbd7 22.Bd7 Nd7 23.Bh8 gh4 24.Ra7+–) 1–0. AGove – slogger, ChessWorld.net, 2007.

4.e3 b5 5.Nc3 c6 6.a4 Bd7 7.ab5 cb5 8.Nd4 Qb6 9.Qf3 Bc6 10.Nc6 (10.Nd5 Qb7 11.Nb5 Nf6 12.Nbc7 Kd8=) 10...Nc6 (10...Qc6 11.Be2 Kd8 12.Nb5+-) 11.Bc4 bc4 12.b5 Rc8 13.bc6 Nf6 (13...Rc6 14.Rb1 Qc7 15.Nb5+-) 14.Nd5 Nd5 15.Qd5 Qc6 16.Qc6 Rc6 17.Ra7 e6 (17...f5 18.Ke2+=) 18.Ke2 (18.Ra8 Kd7 19.Ke2 Rc8 20.Rc8 Kc8+/-) 18...Be7 (18...Rc8 19.Bb2+=) 19.Ba3+/- Bd8 20.Rb1 Rc7 21.Ra8 f6 (21...f5 22.Rb6 e5 23.Bd6+-) 22.Rb6+- e5 1-0. Mely (2855) - Gamejunkie (2245), ChessWorld.net, 2011.

4.e3 Bg4 5.Bc4 e6 6.b5 Qd8 7.Bb2 Nf6 8.h3 Bh5 9.g4 Bg6 10.h4 Bd3 11.Qb3 Bc4 12.Qc4 Nbd7 13.g5 Nb6 14.Qc2 Qd5 15.Ke2 Qb5 16.d3 Nfd5 17.a4 Nb4 18.ab5 Nc2 19.Ra5 Nd5 20.Rc1 Ncb4 21.Nc3 Rg8 22.Nd5 Nd5 23.Rca1 Bc5 24.Bd4 Bd4 25.Nd4 Kd7 26.Ra7 Rab8 27.Kd2 Nb6 28.f4 Rgd8 29.e4 Ke7 30.Ke3 Ra8 31.h5 Ra7 32.Ra7 Rb8 33.Nf3 Nc8 34.Ra2 Nd6 35.Nd4 Nc8 36.f5 Nb6 37.Rc2 Kd6 38.fe6 fe6 39.Rf2 Re8 40.Rf7 Re7 41.Rf8 Nd7 42.Rh8 g6 43.hg6 (43...hg6 44.Nf3+/–) 1–0. Bulcourf,Carlos (2285) – Benko,Francisco (2140), Buenos Aires Clas Abierto op, 2000.

5.Ba3 Qa5 6.Bc4 Nf6 7.Qb3 e6 8.Bf8 Kf8 (8...Rf8 9.0-0=+) 9.0-0= Nbd7 (9...c5 10.d4=) 10.d4 g6 (10...c5 11.Rd1=) 11.Nbd2 Kg7 12.e4 (12.Rfd1 c5=) 12...c6 (12...e5 13.de5 Ne5 14.Ne5 Qe5 15.Rfe1=) 13.e5 Nd5 14.Ne4 h6 15.Nd6 N7b6 16.Bd3 (16.Bd5 ed5 17.Rfc1 Qa6=) 16...Rd8 17.Rfc1 Qb4 18.Qc2 Qa3 (18...Qa4 19.Qe2=) 19.Rab1 (19.Rcb1=) 19...Rd6 (19...Nb4 20.Qd2 Rd6 (20...Na2? 21.Rc2 Nd5 22.Ra2+-) 21.Rb4 Rd5=) 20.Rb3+/- (worse 20.ed6 Nf4 21.Bf1 Qd6=) 20...Qa4 (20...Nb4 21.Qd1 (worse 21.Ra3 Nc2 22.Rc2 Rd8=+) 21...Qa5 22.ed6 Nd3 23.Qd3+/-) 21.ed6 Nb4 22.Qe2 (22.Qb2 Nd3 23.Rd3 f6+-) 22...Nd3 (22...Na2 23.Rcb1 Nc1 24.Qe5 Kg8 25.Bg6 fg6+-) 23.Qd3 Qa2 24.Rcb1?? (24.Qd1 Qa5 25.Ra1 Qd5 26.Rb6 Qd6+-) 24...Bd7? (better 24...Qa6 25.Qa6 ba6+/-) 25.Ne5+- Rd8 26.Ra3 Qd5 27.Ra7 Nc8 28.Rab7 Qd6 29.Qf3 f6 (29...Qe7 30.Qc3 (worse 30.Nd7 Rd7 31.Qc6 Rb7 32.Rb7 Qa3+-) 30...Qd6 31.d5 ed5 32.Nd7 d4 33.Qh3+-) 30.Nc6 (30.Nd7?! Rd7 31.Qe3 Ne7+/-; 30.Rd7?! Rd7 31.Nd7 Qd7+/-) 30...Rf8 (30...Re8 31.Nb8 Re7 32.Nd7 Rd7 33.Rd7 Qd7 34.Rb7+-) 31.Nb8 Rf7 32.Rd7 Rd7 33.Nd7 Qc7 (33...Qd4 34.Qc6 Qd3+-) 34.Qf6 (34.Qf6 Kh7 35.Qf7 Kh8 36.Qf8 Kh7 37.Nf6) 1-0. OnlyPolishOpening (2115) - Beranko (2205), lichess.org, 2020.

5.Ba3 Qb5 6.Qc2=+.

5.Ba3 Qb5 6.d3 –/+.

5.Na3 b5!? –+.

5.Na3 Bf5 6.Nc4=+ Qc5 (6...Nf6 7.Ba3 Bc2 8.Qc2 Qa3 9.Na3+–) 7.Ba3 Qd5 8.Nce5 (8.d4 Nf6=+) 8...b5 (8...Nf6 9.Bc4 Qa5 10.Bf7 Kd8 11.Qb3+/–) 9.d3 (9.d4 Nd7=) 9...Bg6 (9...Nf6 10.e4 Ne4 11.de4 Qe4 12.Qe2 Qe2 13.Be2+/–) 10.Qc2= c6 (10...Qd8 11.Rc1+=) 11.Rc1+= e6 (11...Nf6 12.e4 Qe6 13.Be2+=) 12.e4 Qd8 13.Nc6 Qb6 14.Bf8 Kf8 15.Nfe5 Nf6 16.Nb8 (16.Be2 Nc6 17.Nc6 Rc8+=) 16...Rb8 (16...Qa5 17.Qd2 Qd2 18.Kd2 Rb8 19.Rc7+=) 17.Be2 Qa5 18.Kf1 (18.Qd2 Qd2 19.Kd2 Rd8+/–) 18...Qb6 (18...b4 19.Nc6 b3 20.ab3 Qb6 21.Nb8 Qb8+–) 19.g4 (19.Ke1 Qa5 20.Qd2 Qd2 21.Kd2 Rd8+=) 19...Qd6= 20.Qc7 Rd8 (20...Qd8 21.g5 (21.Ng6?! hg6 22.Qa7 Kg8=) 21...Ne8 22.Qb8 Qb8 23.Nd7 Kg8 24.Nb8+–) 21.Qd6 Rd6 22.Ng6 (22...fg6 23.e5+–) 1–0. Bulcourf,Carlos (2260) – Langier,Daniel (2395), Buenos Aires Intercoop, 2002.

5.Qc2 Nf6 6.Na3 Can c4 get defended? 6...Qa5 (6...c3!? 7.dc3 Qg4=) 7.Nc4+= Qf5 8.Bd3 Qd5 9.Rb1 Nc6 10.0-0 a6 11.e4 Qd8 12.Ba3 Nh5 (12...e6!?+=) 13.e5+/- Nf4 14.Be4 Ne2 15.Kh1 Ned4 16.Nd4 Nd4 17.Qc1 e6 (17...Rb8 18.Na5 b6 19.Qc3+/-) 18.Na5 Ba3 19.Qa3 f6 20.Nb7 (20.Bb7?! Bb7 21.Nb7 Qd5 22.ef6 gf6+=) 20...Bb7 21.Bb7 Rb8 22.ef6 gf6 (22...Qf6 23.Ba6 Rb1 24.Rb1+/-) 23.Ba6+- Kf7 24.Rb8 Qb8 25.Bd3 f5 26.Rb1 Qf8 27.Qc3 Qd6 28.a4 Rd8 29.Bf1 Qc6 30.Qh3 1-0. purrcy (2295) - Pawnhunter1 (2310), ChessWorld.net, 2015.

5.Ne5 Bf5 6.Nc4 Bb1 7.Ba3 Qa3 8.Na3 +–.

5.Ne5 Nf6 6.Bc4=+ e6 7.Nc3 (7.0-0 Qd6 8.d4 Nbd7=) 7...c6 8.a4 (8.Nb1 Qa5 9.Bb2 b5=+) 8...Qa5–/+ 9.f4 Nbd7 10.Nd7 Bd7 11.0-0 Be7 12.Rb1 Rb8 13.Bb2 0-0 14.Ne2 b5 15.Be5 Rbc8 (15...Rbd8 16.ab5 cb5 17.Bb3–/+) 16.Bc3 (16.Bb3 Ng4–/+) 16...b4 17.Bb2 c5 18.Ra1 Nd5 19.Ng3 (19.Qc2 Rb8–/+) 19...Bf6 (19...Nb6 20.Qg4 e5 21.f5 Nc4 22.Qc4–/+) 20.Bf6–/+ Nf6 21.e4 Bc6 22.f5 (22.d3 Qd8–/+) 22...Qd8–+ 23.Kh1 ef5 24.e5 Ng4 25.Nf5 Ne5 26.Ba6 Qg5 27.Ne3 Rcd8 28.Qe2 Be4 29.Rf2 Nd3 30.Bd3 Bd3 31.Qf3 b3 32.Nd1 b2 33.Nb2 Qe5 34.Nd3 Qa1 35.Rf1 Qd4 36.Nf4 Qd2 37.Nh5 Qg5 38.Ng3 Rd4 39.a5 Qg4 40.Qb3 c4 41.Qc3 Rd1 42.h3 Qd4 43.Qd4 Rd4 44.Nf5 Rd3 45.Rf4 c3 46.Rc4 g6 47.Ne7 Kg7 48.Nc8 Re8 49.Na7 Re2 50.Nb5 c2 51.Kh2 Rd1 (52.a6 c1Q 53.Rc1 Rc1–+) 0–1. Bulcourf,Carlos (2205) – Rodriguez,Jorge Luis (2370), Villa Ballester op, 1991.

3.a3 (--> 1.b4 e5 2.a3 d5 3.Nf3).

3.Bb2 Bb4 4.Ne5 Nf6 5.e3 0-0 6.Be2 Nbd7 7.Nf3 Nb6 8.0-0 Bd7 9.a3 Be7 10.Nc3 c6 11.Rb1 Re8 12.d4 Bf5 13.Qd2 Nc4 14.Bc4 dc4 15.Rfe1 Ne4 16.Ne4 Be4 17.Ne5 b5 18.f3 Bh4 19.Re2 Bd5 20.e4 Be6 21.Nc6 Qb6 22.Nb4 Rad8 23.c3 a5 24.Nc2 h6 1–0. Bonetti,Shane – COMP, 2000.

3.Bb2 e4 4.Ne5 Bb4 5.e3?? Nf6-/+ 6.Nc3 Bd6 7.Nb5 (7.f4 a6-/+) 7...Be7 (7...a6!? 8.Nd6 cd6 9.Nf3 ef3 10.Qf3-+) 8.c4 Rg8 (better 8...c6 9.Nc3 0-0-/+) 9.Bd3?? (better 9.cd5 Nd5 10.Bc4=) 9...ed3-+ 10.0-0 (10.cd5 A) 10...Qd5?? 11.Nc7 Kf8 12.Nd5 (12.Na8 Qg2 13.Qf3 Qf3 14.Nf3 b6-/+) 12...Nd5 13.Qb3+- (worse 13.Nd3 Nc6+-); B) 10...Nd5 11.Qh5 Rf8-+) 10...Nc6 (better 10...dc4 11.Nc4 a6-+) 11.Nd4 (11.Qa4 dc4 12.Qc4 Be6-+) 11...Bd7 (11...Ne5 12.cd5 Qd5 13.Bc3-+) 12.Qc1 (12.Ndc6 Bc6 13.Rc1-+) 12...Bh3 (better 12...Ne5 13.cd5 Nd5-+) 13.Nd7?? (better 13.Ndc6 bc6 14.gh3-/+) 13…Bd7-+. littleplotkin (2560) - opperwezen (2665), lichess.org, 2019. (=1.Nf3 d5 2.b4 e5)

3.b5 (--> 1.b4 e5 2.b5 d5 3.Nf3).

3.c4 e4-/+ 4.Nd4 dc4 5.e3 a5 (5...c6 6.Bc4 Qg5 7.Rg1-/+) 6.ba5 (6.b5 Qg5=+) 6...c5-/+ 7.Nb5 Be6 8.Qa4 (8.N1a3 Ra5 (worse 8...Qa5 9.Nc4 Qd8 10.Bb2+=) 9.Nc3 Nf6=+) 8...Nc6 9.N1c3 (9.Bc4 Ra5 (9...Qa5?! 10.Nc7 Ke7 11.Qa5 Ra5 12.Ne6 fe6 13.Na3=) 10.Qb3 Nb4-/+) 9...Ra5-+ (worse 9...Qa5 10.Nc7 Qc7 11.Qa8 Qc8 12.Qc8 Bc8 13.Bc4+/-) 10.Qc2 f5 11.Be2 (11.Na3!?-/+) 11...Nb4-+ 12.Qb1 Be7 (12...Qd7 13.0-0-+) 13.0-0 (13.Na3 Nd3 14.Bd3 cd3 (14...Qd3?! 15.Qb6 Ra6 16.Qb7=) 15.Qb7 Bf6-+) 13...Bf6 (13...Qd7 14.Bh5 g6 15.Be2-+) 14.a3 (14.f3 Qd7 15.fe4 fe4 16.Qe4 Ra6 17.Bc4 Kd8+/-) 14...Nd3 15.Bd3 cd3 (worse 15...Qd3 16.Nc7 Kf7 17.Qb6+/- (17.Ne6?! Qb1 18.Rb1 Ke6=)) 16.f3 Qd7 17.a4 ef3 18.Rf3 Ne7 19.Ba3 b6 20.Bb2 Bc4 (20...Ng6 21.Rf1-+) 21.Qf1 (21.Nd1 0-0-/+) 21...0-0-+ 22.Qb1 Rfa8 23.e4 (23.Ra3 Bc3 24.Nc3 b5 25.Nb5 Bb5 26.Qa2 Qd5 27.Qd5 Nd5 28.ab5 Ra3 29.Ba3 Ra3 30.Rf5 Ra1 31.Kf2 Nf6-+) 23...fe4 (better 23...Bb5 24.Nb5 fe4-+) 24.Ne4?? (better 24.Rf6 gf6 25.Ne4-+) 24...Bb2 25.Qb2 Bb5 26.ab5 (26.Raf1 Ra4 27.Nc3-+) 26...Ra1 27.Kf2 Qd4 (better 27...Qe6 28.Nf6 gf6-+) 28.Qd4 cd4 29.Nd6 (29.Rd3 Rf8 30.Ke2 Ra4-+) 29...Rf8 30.Rf8 Kf8 31.Kf3 Nd5 (31...Re1!? 32.Nc4 Nd5 33.h4-+) 32.Ke4 Nc3! 33.Kd4 (33.dc3 d2 Passed pawn) 33...Nb1 (33...Ra3 34.h4-+) 34.Kd3 Ra3 (better 34...Ra5 35.g4-+) 35.Kc2 Ra2 36.Kb1 Rd2 37.Ne4 (37.Nc4 Rg2 38.h4 Rg4 39.Nb6 Rb4 40.Kc2 Rb5-+) 37...Rg2 38.Kc1 (38.h3 Rh2 39.Ng5 Ke7-+) 38...Ke7 (38...Rh2 39.Nc3-+) 39.Kd1 (39.h3 Rh2 40.Nc3 Rh3 41.Nd5 Kd6 42.Nb6 Rb3-+) 39...Ke6 (39...Rh2 40.Nc3 Rh5 41.Kd2-+) 40.Ke1 (40.h3 Kd5 41.Nc3 Kc4-+) 40...Ke5 (40...Rh2 41.Ng5 Kd5 42.Nf7-+) 41.Nc3 (41.Nd2 Kf4 42.Nc4 Rh2 43.Nb6 Rh5-+) 41...Rh2 42.Kf1 (42.Na4 Rh6-+) 42...Rc2 (better 42...Rb2 43.Na4 Rb5 44.Nc3-+) 43.Ne2 (43.Na4-+) 43...Ke4 44.Ng3 Kf3 45.Nh1 Rc1 0-1. Prozorov - chez (2035), Rated Blitz game, lichess.org, 2013.

3.e3 Bb4 4.Ne5 = (--> 1.b4 d5 2.Nf3 e5 3.Ne5 Bb4 4.e3=).

3.e3 Nc6?? 4.Bb5 (4.b5!? Nb4 5.a3+/–) 4...Bd7 (4...Bg4 5.Bb2 e4 6.h3=+) 5.0-0 (5.Bc6 Bc6 6.Ne5 Qg5 7.Nc6 Qg2=+) 5...Bb4 (5...e4 6.Bc6 bc6 7.Ne5 Bb4 8.f3=+) 6.c3 (6.Bc6 Bc6 7.Ne5 Bb5=) 6...Bc5 (better is 6...Bd6–/+) 7.Nh4?? (better is 7.Bc6 Bc6 8.Ne5=) 7...Qh4–+ 8.d3 Bd6 9.d4 ed4 10.ed4 Qh2 0–1. driou – theeagle (1605), net–chess.com, 2004.

3.Ne5 Qe7 4.Nd3 Nf6 (4...Bf5 5.Nc5+=) 5.Bb2 Bf5 6.e3 Qd6 (6...Nbd7 7.Bd4+=) 7.Be2 (7.a3 Be7+=) 7...Qd8 (7...Nbd7 8.0-0+=) 8.0-0 (8.a3 a5+/–) 8...Be7 (8...Bd3 9.Bd3 Bb4 10.Qf3+=) 9.Nf4 (9.Nc5 Bc5 10.bc5 0-0+/–) 9...Bb4+= 10.Bf6 Qf6 (10...gf6 11.Nc3 Bc3 12.dc3+/–) 11.Nd5+/– Qa1 (11...Qe5 12.Nbc3 (12.Nb4?! Qa1 13.Nd5 Qe5=+) 12...Bd6 13.f4+/–) 12.Nc7 Ke7 (12...Kd8 13.Na8 Qa2 14.c3+=) 13.Na8 Qa2 14.e4 (better is 14.Bd3!? Bd3 15.cd3+/–) 14...Be4= 15.Bb5 (better is 15.Bd3!? Bd3 16.Re1 (16.cd3? Nc6–+) 16...Kf6 17.cd3=) 15...Qc2–/+ 16.Qg4 h5 (better is 16...Kf6!?–/+) 17.Qg7+= Rc8 18.Qe5 Kf8 19.Qh8 (19.Ba4 Nd7 20.Bd7 Ra8+–) 19...Ke7= 20.Qd4 Bd6 21.Nc3 (21.Re1 f5 22.Qg7 Ke6 23.Qg6 Ke7 24.Qf5 Qb1 25.Qg5 (25.Rb1?? Bf5 26.Re1 Kf6–+; 25.Qe4 Qe4 26.Re4 Kf6+=) 25...Ke6 26.Rb1 Bb1 27.Bc4 Rc4 28.Qg8 Ke7 29.Qc4+–) 21...Nc6= 22.Qe3 f5 23.f3 f4 24.Qe1 Nd4 (24...Be5 25.fe4 Ra8 26.Nd5 Kd6 27.Bc6 bc6 28.Nf4+=) 25.Qh4 (25...Ke6 26.Ne4 (26.fe4?! Ra8 27.Qh3 Kf6+/–) 26...Nb5 27.Qf6 Kd7 28.Qf5 Kd8 29.Qb5+–) 1–0. Ritter,Fredi – Moeckel,Jean, TT–05 TSC, 2003.

3.Ne5 f6 4.Nd3 Nc6 5.b5 Nd4 6.e3 Nb5 7.Nf4 g5?? (better is 7...Nd6 8.Qh5 Nf7 9.Qd5 Bd6+/–) 8.Qh5+– Ke7 (8...Kd7 9.Bb5 c6 10.Ng6+–) 9.Ng6! (9.Bb5?! gf4 10.e4 c6 11.Ba3 Ke6 12.ed5 cd5 13.Bf8 Qf8+–) 9...Ke8 (9...hg6 10.Bd3 (10.Qh8; 10.Bb5)) 10.Bb5 Kf7 11.Ne5 Ke6 12.Qf7 Ke5 13.d4 Kf5 14.Bd3 Kg4 15.h3 Kh4 16.g3# 1–0. pierre – Muddyfox, internet, 2006.

3.Ne5 Nf6 4.Nd3 c5 (better 4...Bf5!?=) 5.bc5 Nc6 (5...Nbd7 6.Ba3+/-) 6.Ba3 Be7 7.g3 (7.e3 0-0+/-) 7...0-0 8.Bg2 Bf5 9.Nc3 (9.0-0 Re8+/-) 9...d4 10.Nb5 (10.Nb1+=) 10...a6 (10...Qa5 11.Bc6 Bd3 12.cd3 bc6 13.Nd4 Qa3 14.Nc6 Bc5-/+) 11.Nd6+/- Bd3 (11...Bd6 12.cd6 Qa5 13.Qc1+/-) 12.cd3+- (worse 12.ed3 Bd6 13.cd6 Re8 14.Kf1 Qa5+=) 12...Nd5?? (better 12...Bd6 13.cd6 Qd7+/-) 13.Bd5 Ne5 (13...Qd7 14.0-0+-) 14.0-0 (14.0-0 Bd6 15.cd6+-; 14.Qb3 Rb8+-) 1-0. k1fight (2185) - chess_9000-elo (2045), Rated Bullet game, lichess.org, 2014. (=1.Nf3 d5 2.b4 e5 3.Ne5)

4.a3 Ngf6 5.c4 e4 6.Nd4 dc4 7.Bc4 Ne5 8.Ba2? (better is 8.d3–/+) 8...Nd3–+ 9.Kf1 Ng4 10.Rg1 (10.Nc3 Ndf2 11.Qb3–+) 10...Ngf2 (10...Qh4 11.Qe1 Ne1 12.Ke1 Qf2 13.Kd1 Ne3 14.de3 Bg4 15.Nf3 ef3 16.Nd2 fg2 17.Kc2 Qg1 18.Bb2 Qe3 19.Bc3–+) 11.Qe2 (11.Qa4 Bd7 12.Qc2 Nc1 13.Bf7 Kf7 14.Qc1 Qf6 15.Qc7 Nd3 16.Nf3 Rd8–+) 11...Nc1 (better is 11...Qf6 12.Qh5 Ng4 13.Nf3 ef3 14.Qf7 Qf7 15.Bf7 Kf7 16.gf3 Nge5–+) 12.Qf2 Qf6?? (better is 12...Na2 13.Ra2 Bd6–+) 13.Qf6+= gf6 14.Bc4 a6 15.a4?? c5?? 16.Na3?? Nd3 17.Ndc2? cb4 18.Nb1 Be6 19.Be6 fe6 20.Ke2 Bc5 21.Rf1 f5 22.g3 h5 23.h4 b3 (23...b3 24.Nd4 b2–+) 0–1. Oneness – mels01, Live Game Caissa's Web, 2004.

4.a3 g6 5.Bb2= Bg7 6.c4 Ne7 7.cd5 Nd5 8.Bc4 N5b6 9.Bb3 0-0 10.h4 (10.d4 e4 11.Nfd2 Qg5=) 10...Qe7 11.h5 c5 (better is 11...e4!? 12.Bg7 Kg7=) 12.hg6+= hg6 13.d3 (13.Qc2 Qd6+/–) 13...Rd8 (13...cb4 14.Qc2 Nc5 15.ab4=) 14.Qc2 (14.Qd2 cb4 15.ab4 Nb8=) 14...cb4= 15.d4 e4 (15...ba3 16.Ba3 Qf6 17.Nc3 ed4 18.Nd4=) 16.Nh4 (16.Nfd2!? Nf6 17.ab4=) 16...Nf8+= 17.g3 Bg4 18.Nd2 g5 19.Ng2 Rac8 (19...Bf3 20.Rh2+=) 20.Qe4= Qe4 21.Ne4 Bf3 (21...Ne6!? 22.Nd2 Nc5+=) 22.Ng5 Bd5 23.Bd5 Nd5 24.Kd2 b3 25.Rhc1 Bh6 26.Ne4 Ne6 27.Nf4 b6?? (better is 27...Bf4 28.gf4 f5+/–) 28.Nd5+– Rc1 29.Rc1 (worse is 29.Bc1 Kg7 30.Nf4 Nc5 31.Nc5 bc5+–) 1–0. Jaramillo,Carlos Orlando (1915) – Dabraccio,Guillermo (1765), Manizales COL, 2014.

4.Nd4 Bb4!? 5.Bb2 Nf6 –/+.

4.Nd4 Nf6 5.a3+= c5 (5...a5 6.b5+=) 6.bc5 Bc5 7.Nb3 (7.Bb5 Bd7+=) 7...Bd6 8.d3 (8.Bb2 Nc6+=) 8...0-0 9.de4 (9.Bb2 Bg4 10.Bf6 Bd1 11.Bd8 Bc2+=) 9...Be5–/+ 10.Ra2 Ne4 11.Bd3 (11.Qf3 Qg5 12.N3d2 Be6+=) 11...Qg5–/+ 12.g3 Bh3 (12...Bc3 13.Bd2 Bg4 14.Be2 Be2 15.Qe2–/+) 13.f4 Qf5 14.Nd4 (14.Bb2!? Bb2 15.Rb2–/+) 14...Bd4–+ 15.ed4 Nc6 16.c3 (16.Be3 Qe6 17.Be2 Rfe8–+) 16...Rfe8–+ 17.Re2 (17.Be2 Bg2 18.Rg1 Qh3–+) 17...Qh5 (17...Bg4 18.0-0–+) 18.Be4 (18.Qc2 Rac8 19.Be4 Nd4 20.Bh7 Kf8 21.cd4 Re2 22.Qe2 Rc1 23.Kd2 Qe2 24.Ke2 Rh1 25.Bc2–+) 18...Bg4 (18...Re4?! 19.Re4 Qd1 20.Kd1 de4 21.Nd2 Bg4 22.Ke1=; 18...de4?! 19.Re3 Bg4 20.Qb3–/+) 19.Bd3 (19.Nd2–+) 19...Re2 20.Be2 Re8 21.h3 (21.Kd2 Re2 22.Qe2 Be2 23.Re1–+) 21…Be2 (21...Be2 22.Kd2 Bd1–+) 0–1. mrj – pierre (2190), internet, 2007.

4.Nd4 Nf6 5.b5 Bc5 6.c3 (6.Be2 a6+=) 6...Nbd7 7.a4 Ne5 8.f4 (8.Be2 Bg4 9.f3 ef3 10.Nf3 Nf3 11.Bf3 Bf3 12.Qf3 a6+=) 8...Neg4 (8...ef3 9.Nf3 Nf3 10.Qf3–/+) 9.h3 Nh6 10.d3 Bd7 11.Ba3 Ba3 12.Na3 b6 (12...Qe7 13.Qd2+=) 13.de4 (13.g4 ed3 14.Bd3 Qe7=) 13...0-0 (13...Ne4!? 14.Nf3 c6+=) 14.ed5 Nd5 15.Qd2 Qh4 16.Kd1 (16.Qf2 Qe7=) 16...Qg3 (16...Ng4 17.Kc1 Nge3 18.c4 Nf1 19.Rf1+=) 17.Nf3 (17.Nc4 Rad8 18.Kc1 Bf5+=) 17...Be6 18.c4 Nf6 19.Kc1 (19.Qe1 Qg6=) 19...Rfd8 (better is 19...Ne4 20.Qc2 Nf2–/+) 20.Nd4?? (better is 20.Qe1 Ne4 21.Qg3 Ng3 22.Rg1=) 20...Ne4–+ 21.Qc2 (21.Ne2 Qf2 22.Qb4 Qe3 23.Kb2 Rd2 24.Nc2–+) 21...Qe3 22.Kb1 (22.Kb2 Qd4 23.Ka2 Nc3 24.Kb3 Na4 25.Be2 Nc5 26.Ka2–+) 22...Nc3 (better is 22...Rd4 23.g4 Rd2–+) 23.Kb2 Qd4 (better is 23...Na4!? 24.Qa4 Qd4 25.Ka2–+) 24.Qc3 Qf4 25.Nc2 Nf5 26.Bd3 a6 27.Rhf1–/+ Qg5 28.g4 Ng3?? 29.Rfe1?? ab5–+ 30.cb5 Kh8 31.Bh7 Rd2 32.Qg3 Qf6?? 33.Kb1?? Qe7?? 34.Bd3 Rd8 35.Ra3 g6 36.Kc1 Kg7 37.Kd2 Qg5 38.Re3 Bc4 39.Qc7 Rf8 40.Qc4 Qh4 41.Qd4 Kh7 42.Qb6 Qf2 43.Be2 Kh6 44.a5 1–0. Wally101 – pieeater, ChessWorld.net, 2013.

4.Ne5 Bb4 5.Qh5 Nh6 6.Be2 0-0 7.0-0 Bd6 (8.Bb2 Qe8–/+; 7...f6 8.Ng4 Bg4 9.Bg4 Ng4 10.Qg4–+) 0–1. QueenZara – i2win, Live Game Caissa's Web, 2005.

4.Ne5 Nf6 5.d4 Bb4–/+ 6.c3 Bd6 7.Be2 Be5 (8.de5 Ng8=+). arifagam – thesimplebr (1840), net–chess.com, 2002.

4.Ne5 Nh6 5.Bb2 f6 6.Qh5 g6 7.Ng6 hg6 8.Qg6 Nf7 9.Bf6? (better is 9.Qf6 Qf6 10.Bf6–/+) 9...Qd6–+ 10.c4? (10.Qf7 Kf7 11.Bh8 Qb4 12.c4 dc4 13.Nc3–+) 10…Rh6 (10...Rh6 11.Qg3 Qf6–+ (worse is 11...Rf6 12.Qd6 Bd6 13.Nc3–+)) 0–1. Steve20 – michaelbuss, ChessWorld.net, 2007.

4.Bb2 e4 5.h3 Bh5 += (worse is 5...ef3 6.hg4 fg2 7.Bg2+=).

4.Be2 Nd7 5.h3 (5.Bb2 Bf3 (worse is 5...Bb4 6.Ne5 Be2 7.Qe2+=) 6.Bf3 e4+=) 5...Bh5 (5...Bf3!? 6.Bf3 e4–/+) 6.a3 Bd6 7.0-0 Ngf6 8.Bb2 0-0 9.c4 (9.d3!?+=) 9...dc4–/+ 10.Nc3 e4 11.Nd4 (11.Ng5 Be2 12.Qe2 Qe8–/+) 11...Be2–+ 12.Qe2 Ne5 13.f3 (13.Ncb5 Nd3 14.Nd6 cd6–+ (14...Nb2?! 15.Nb7 Qd5 16.Na5=; 14...Qd6?! 15.Nb5 Qb6 16.Bf6–/+)) 13...ef3 (13...Nd3 14.Rab1 Be5 15.Nf5–+) 14.Nf3 Nd3 15.Rab1 c5 (15...a5 16.ba5 Ra5 17.Ne1–+) 16.Ne1 (16.bc5!? Bc5 17.Ne1–/+) 16...cb4–+ 17.ab4 Bb4 18.Nc2 (18.Ba1 Bc3 19.Bc3 Ne4 20.Bg7 Kg7 21.Qg4 Qg5 22.Qe4 Ne1 23.Rbe1 b5+=) 18...Bd6 19.Nd4 (19.Nd1 Nb2 20.Nb2 b5–+) 19...a6 20.Ba1 b5 21.Nc6 Qd7 22.Nd4 Rae8 23.Nd1 Bc5 24.Nf3 Ne4 25.Nb2 Ng3 26.Qd1 Nf1 27.Nd3 Qd3 28.Qf1 Qf1 29.Kf1 Rd8 30.Bd4 Bd4 31.Nd4 Rfe8 32.Ke2 Rd4 33.Rb2 Rd5 34.Ra2 Re6 35.Kf3 b4 36.g3 a5 37.h4 b3 38.Rb2 a4 39.e4 Rd3 40.Kf2 a3 41.Rb1 Re4 0–1. pillsbury (2120) – ppramanik (2495), net–chess.com, 2010.

4.Be2 Bf3 5.Bf3 e4 6.Be2 –/+.

4.Be2 Bf3 5.Bf3 e4 6.Bg4 g6 (6...Bb4!? 7.Bb2 Nf6–/+) 7.c3 Bg7 8.Qa4 c6 9.b5 f5 10.Bh3 Ne7 11.d3 0-0 12.de4 de4 13.0-0 Qd3 14.Qb4? (better is 14.Ba3 Rf7 15.Be7 Re7 16.Qb3 Rf7 17.a4+=) 14...Nd5–+ 15.Qb3 Bc3 (15...Qb5 16.Qc2–+) 16.Nc3 Qc3 17.Qc3 Nc3 18.Re1 Nb5 19.Bb2 Nd7 20.a4 Nc7 21.Red1 Rad8 22.g3 Nc5 23.Rd8 Rd8 24.Bd4 Nb3 25.Rb1 Nd4 26.ed4 b6 27.a5 b5 28.Bg2 Rd4 29.f4 Nd5 30.Rc1 Nb4 31.h3 Kf7 32.Bf1 Ke6 33.Ra1 a6 34.h4 c5 35.Kh2 c4 36.Kh3 Nd3 37.g4 Nf2 38.Kg3 Ng4 39.Be2 Nf6 40.h5 gh5 41.Kh4 e3 42.Rf1 Ng4 43.Kh5 Nf2 44.Kh6 Rf4 45.Kh7 Rh4 46.Kg7 Rh1 0–1. rprado (2125) – danielro (2260), net–chess.com, 2011.

4.Bb2 f6 5.Nd3 Bd6 6.e3 Ne7 7.Qh5 Ng6 8.Qd5 Nc6 9.Be2 Bd7 10.0-0 Qe7 11.c4 (11.Nc3 0-0-0+/–) 11...0-0-0 12.c5 Be5 13.Ne5 Nce5 14.d4 (14.Qb3 Be6 15.Qc2+/–) 14...Nf7? (better is 14...Bb5! 15.Qd8 Rd8 16.Bb5 a6+=) 15.Qb3 Bc6 (15...Be6 16.Qa4 Kb8 17.Nc3+–) 16.Nc3 Kb8 17.d5 Bd7 (17...Be8 18.Ba3 Bd7 19.c6+–) 18.c6 Bf5 (18...Bc8 19.cb7 Bb7+–) 19.Qb7 1–0. pumpkin (2515) – islanderfan (1635), net–chess.com, 2004.

4.Bb2 f6 5.Nd3 Bd6 6.e3 Bf5 7.f4 Qe7 8.Be2 Bd3 9.cd3 c5 10.0-0 Nc6 11.Nc3 d4 12.Nb5 0-0-0 13.Nd6 Rd6 14.Rc1 de3 15.Re1 Nh6 16.Bg4 Ng4 17.Qg4 Rd7 18.Re3 Qd6 19.Qf5 b6 20.Qe4 Kc7 21.Qc4 a5 22.a3 Rb8 23.g3 b5 24.Qc5 Qc5 25.Rc5 Rb6 26.d4 Kb7 27.d5 Ne7 28.d6 Nc8 29.Rc7 Rc7 30.dc7 Kc7 31.Bc3 b4 32.ab4 ab4 33.Bd4 Rb5 34.Bb2 Kd7 35.Rb3 Ke6 36.d3 ½–½. Spitzner – Sanftenberg, corr DDR 1985.

4.c4 c6 5.Qa4 Na6 6.a3 Bd6 7.Bb2 Qb6 8.Qc2 d4 (8...f6 9.Nd3+=) 9.Nf3= Bf5 10.d3 c5 11.g3 (11.e3!?=) 11...Nf6+= 12.Bg2 0-0-0 (12...0-0 13.0-0+=) 13.0-0= Ng4 14.Nbd2 h5? (14...Qa5 15.Rab1 Rd7 16.h3+=) 15.Nb3 (better is 15.Rab1 Qc7 16.Bd4 cd4 17.Nd4+–) 15...h4= 16.Nbd4 (16.Nh4 Rh4 17.gh4 Bh2 18.Kh1+=) 16...cd4+= 17.Bd4 Nc5 18.Rab1 Qc7 19.Bc5? (better is 19.Bg7 hg3 20.hg3+=) 19...Bc5–+ (worse is 19...Qc5 20.Rb5 Qc7 21.Nh4 (worse is 21.Rf5 hg3 22.hg3 Bg3–/+) 21...Rh4 22.Bb7 (worse is 22.gh4 Bc5 23.Rc5 Qc5–/+) 22...Kd7 A) 23.gh4 Bc5 (23...Ba3?! 24.f4 Bc5 25.Kh1–/+) 24.Bc6 Ke6 25.Bd5 Kf6 26.Qb2 Kg6 27.Bf7 Kh6 (27...Kf7?? 28.Rb7 Bd6 29.Kg2+–) 28.Qc1 Kh7 29.Bg6 Bg6 30.Qh6 Kh6 31.Kg2 Qh2 32.Kf3 Ne5; B) 23.Rf5+/–) 20.Nh4 Rh4 21.Rb7 Qd6 22.Rf7 Be6 (22...Rh2 23.Bb7 Kb8 24.Qb3 Rf2 25.Bg2 Qb6 26.Qb6 ab6 27.Rf2 Bf2 28.Kf1 Rd3 29.Bd5 Rd1 30.Kg2–+) 23.Rg7? (23.d4 Bf7 (23...Qd4 24.Qa4 Qd6 25.Bc6 Bc4 26.Bb7 Kb8 27.Qc4+=; 23...Bd4?? 24.Qe4 Rd7 25.Qa8 Kc7 26.Rb1+–; 23...Ba3 24.Ra7 Rh2 25.Qe4 Rg2 26.Kg2+–) 24.dc5 Qe5–/+) 23...Rh2 (better is 23...Nf2 24.e3 Ng4 25.Bb7 Kb8 26.gh4 Ne3–+) 24.Qb2?? (24.Bb7 Kb8 25.Qb2–+) 24...Rg2! 25.Kg2 Qc6 26.Kg1 Bd4 (26...Bd4 27.Qb5 Qb5 28.cb5 Bg7–+) 0–1. Gimeno Royo – Roche Simon (2205), Zaragoza op, 2005. (=1.Nf3 d5 2.b4 e5 3.Ne5 Bb4)

4.c4 Bd6 5.Bb2 Be5 6.Be5 Nf6 (6...dc4?? 7.Bg7 Ne7 8.Bh8+–) 7.Bf6 (7.cd5!? 0-0 8.Bf6 Qf6 9.Nc3+=) 7...Qf6+= (worse is 7...gf6 8.cd5 Qd5 9.Nc3+/–) 8.Nc3 d4 9.Ne4 Qe5 10.d3 0-0 11.g3 f5 12.f4 Qa5 13.Nd2 c5 14.Bg2 Qa6 15.0-0 Bd7 16.Qb3 Bc6 17.Bd5 Kh8 18.Nf3 Nd7 19.Ng5 Bd5 20.cd5 Nf6 21.Ne6 Rf7 22.Nc5 Qd6 23.Nb7 (23.Ne6 Nd5 24.Nd4 Qc5+=) 23...Qd5 (better is 23...Qc7 24.Rab1 Rb8+=) 24.Qd5 Nd5 25.Nd6 Rd7 26.Nf5 g6? (26...Nc3 27.Rf2+/–) 27.Nh4 (better is 27.Nd4!? Re8+–) 27...Re8+/– 28.Kf2 Rf7? (28...Rde7 29.Nf3 Re2 30.Kg1 R2e3 31.Nd4 Rd3+/–) 29.Kf3?? (better is 29.Nf3!? Ne3 30.Rfc1+–) 29...g5 30.Ng2 Nc3 31.Rfe1 Ref8 32.a4 a5? 33.Ra3 Nd5 34.Ke4 Nb4 35.Rc1 Re7 36.Kd4?? Rd8–+ 37.Kc3 Re2 38.Rg1 Rc2 39.Kb3 Rd3 0–1. dagr – erikerik, gameknot.com, 2010. (=1.Nf3 d5 2.b4 e5 3.Ne5 Bb4)

4.c4 Bd6 5.Bb2 Qe7 6.Nf3= Nf6 (6...dc4?? 7.Bg7 Nc6 8.Bh8+–) 7.Bf6 (7.cd5!? Nd5 8.Bg7=) 7...Qf6+= 8.Nc3 dc4 9.e3 Be6 10.Rb1 b6 11.Qa4 Nd7 12.Bc4 0-0 13.Be6 Qe6 14.Qe4 Rfe8 15.Qe6 Re6 16.Ke2 c5 17.Rhc1 Ne5 18.Nb5 Nf3 19.gf3? (better is 19.Kf3!? a6 20.Nd6 Rf6 21.Ke2 Rd6 22.a4=) 19...Bh2–/+ 20.a4 a6 21.Na3 g6 22.Nc4 Rb8 23.Rb3 Bc7 24.Na3 Be5 (24...Rd8 25.d3–+) 25.Rcb1 (better is 25.a5–/+) 25...Bc7 26.Nc4?? (26.Rc1 Rd8 27.Nc4–+) 26...Kf8 27.f4 f6 28.Kf3 Kg7 29.e4 h6 30.d3 g5 31.f5 Rc6 32.Kg4 Kh7 33.f3 (33.Ne3 Bd8=) 33...Kg7 34.R3b2? (better is 34.Kh5!?+=) 34...h5–+ 35.Kh3 Kf7 36.Kg2 Ke7 37.Ne3 Bd8 (37...Kd7 38.Nd5–/+) 38.Rh1 (38.Nd5 Kd7+=) 38...h4–/+ 39.f4 gf4 (better is 39...b5!?–/+) 40.Nd5= Kd6 41.Kf3 c4 (41...Ke5 42.Nf4 Bc7 43.Ke3=) 42.d4 (42.Rh4!? c3 43.Rc2+=) 42...b5 43.ab5 Rb5 44.Rc2 (44.Rb5 ab5 45.Nb4 Rc7 46.Rh4 c3+=) 44...Rb3 (better is 44...Rd5 45.ed5 Kd5 46.Kf4 Bb6–/+) 45.Kf4= h3 46.Ne3 (46.Nc3 Kd7 47.Rh3 Bb6 48.Rh7 Kc8+–) 46...c3 (46...Bb6!? 47.Rh3 Bd4 48.Nc4 Rc4 49.Rc4 Rh3 50.Rd4 Kc5 51.Rd5 Kc6+=) 47.Rh3 Rb4 48.Rh8 Bb6 49.Nd5 Rd4? 50.Nb6 Rb6+= 51.Rc3 Rbb4 52.Rd8 Ke7 53.Rd4 Rd4 54.Rc7 Rd7 55.Rc5 Ra7 56.Ra5 Kd7 57.e5 fe5 58.Ke5 Ke7 59.Ra1 a5 60.Rh1 Kf8 61.f6 Kg8 62.Kf5 a4 63.Kg6 Ra6 64.Rc1 Ra8 65.Rc7 a3 66.Rg7 Kf8 67.Rh7 Kg8 68.f7 1–0. Bulcourf,Carlos (2160) – Torella,Rodolfo (2055), Rubinstein Memorial op, 2009. (=1.Nf3 d5 2.b4 e5 3.Ne5 Bb4)

4.c4 Bd6 5.Bb2 f6 6.Qa4 c6 7.Nf3 +=.

4.c4 Nd7 5.Qa4 (5.Nd7 Qd7 6.cd5 Ne7+=) 5...Bd6 6.Bb2 (6.Nd7 Bd7 7.Qb3 dc4 8.Qb7 Ne7=) 6...Be5 (6...Ngf6 7.d4=+) 7.Be5= f6 (7...Ngf6!?=) 8.Bg3+= Ne7 9.e3 (9.cd5 Nd5 10.Nc3 Nc3 11.dc3 c6+=) 9...c6 10.cd5 Nb6 11.Qa3 Qd5 (11...Nbd5 12.e4 Nb6 13.Be2=) 12.Nc3 Qe6 13.Ne2 0-0 14.Nd4 Qf7 15.Bd6 Re8 16.Bc5 Nd7 (16...Ned5 17.Rb1 Nd7 18.Bc4=+ (worse 18.Ba7 Ne5-/+)) 17.Be2 (17.Be7 Qe7 18.Bc4 Kh8 19.Qe7 Re7 20.Nf5+=) 17...b6? (17...Nc5 18.Qc5 Qg6 19.0-0=) 18.Bd6 (18.Be7 Re7 19.Bh5 Re3 20.Qe3 Qh5+/-) 18...Bb7 (18...Ne5 19.f4 N5g6 20.Qb3+=) 19.0-0 (better 19.Be7!? Qe7 20.Bc4 Kh8 21.Qe7 Re7 22.Nf5+/-) 19...Nc8 20.Bg3 Ne5 21.f4 Nd7 (better 21...Nc4!? 22.Qc1 N8d6=) 22.Rac1 c5 (better 22...Ne7+/-) 23.Nf5?? (better 23.Nb5!? Re4 24.Bf3+/-) 23...Nf8 (23...Bd5 24.Rc2=) 24.Qa4 Qd7 (better 24...Bd5!?=) 25.Bb5+/- Qf5 (25...Qd2? 26.Rc2 Qd8 27.Be8+-) 26.Be8 Qd5 27.Qc4?? (better 27.Rf2+/-) 27...Qc4-+ 28.Rc4 Nd6 29.Rc2 (29.Ra4 Ne8 30.f5 a6-+) 29…Re8 0-1. mordor1 (2085) - jovanns (2020), Rated Blitz game, lichess.org, 2015. (=1.Nf3 A00: Irregular Openings 1...d5 2.b4 e5 3.Ne5)

4.e3 Nc6 5.Bb5 Bd7 6.Bc6 Bc6 7.Nc6 bc6 8.c4 (8.Bb2 Nf6 9.Qf3=) 8...Nf6?? (better is 8...Qf6 9.Nc3 Bc3 10.dc3 Qc3 11.Bd2 Qc4–/+) 9.Qa4+/– Bd2? (better is 9...Rb8 10.a3 Be7+=) 10.Nd2+– (10.Nd2 0-0 11.Qc6+–; 10.Kd2?! Ne4 11.Ke2 0-0+/–) 1–0. Pommerel,Wim H – Foerster,Hans Georg, CiF, 1987. (=1.Nf3 d5 2.b4 e5 3.Ne5 Bb4)

4.e3 Bd6 5.Nf3 Bg4 6.Be2 Nf6 7.h3 Bh5 8.d3 0-0 9.Nbd2 c5 10.Rb1 b6 11.Bb2 Qe7 12.0-0 Nc6 13.Ng5 (13.c4 dc4 14.Nc4 Rfd8=) 13...Be2 14.Qe2 h6 15.Ngf3 Rad8 16.c4 d4 17.ed4?? (17.Rbe1 de3 18.Qe3 Qe3 19.fe3 Nh5–/+) 17...cd4 (better is 17...Qe2 18.d5 Nb4–+) 18.Qe7+= Be7 19.Rfe1 Bc5 20.Ne4 Ne4 21.Re4 Nb4 22.Rbe1?? Nd3–+ 23.R1e2 Nb4?? 24.Bd4+= Bd4 25.Rd4 Rd4 26.Nd4 Rc8 27.Rb2 Rc4–/+ 28.Nb5 a6 29.Nd6 Rd4 30.Nf5 Rf4 31.Ne3 a5 32.g3 Rf6 33.a3 Nd3 34.Rb6?? Rb6–+ 35.Nc4 Rb1 36.Kg2 Ne1 37.Kh2 Rc1 38.Na5 Rc3 39.Nb7 Ra3 40.Nc5 Ra2 41.Ne4 Nd3 42.Kg2 f5 43.Nd6 g5 44.Kf3 Nf2 45.Nf5 Kh7 46.g4 Nh3 47.Kg3 Nf4 48.Nd4 Rg2 49.Kf3 Rg1 50.Nf5 Kg6 51.Ke4 Rg4 52.Ne7 Kf7 53.Nf5 Ng2 54.Kf3 Rf4 55.Kg2 Rf5 56.Kg3 Rf4 57.Kg2 h5 58.Kg3 h4 59.Kg2 Rg4 60.Kf3–+ Rg3 61.Ke4 h3 62.Kd5 h2 63.Kc5 h1Q 64.Kd4 Qd1 65.Kc4 ½–½. antrobus – kacperek35, playok.com, 2012. (=1.Nf3 d5 2.b4 e5 3.Ne5 Bb4)

4.e3 Nd7 5.Nd3 Be7 6.Be2 Ngf6=+ 7.Ba3 0-0 8.0-0 c5 9.Nc3 Re8 10.Rb1 Bd6 11.f4 b6 12.Nb5 Be7 13.Ne5 Bb7 14.Bh5 Nh5 15.Qh5 g6 16.Qh3 a6 17.Nd6+/– Bd6 18.Qd7 Be5 19.Qd8 Rad8 20.Rb6 Rb8? 21.fe5+– Re5 22.Rfb1 Re7 23.Bc5 Rd7 24.Ra6! Rc8 25.Ra5 Bc6 26.Bd4 Rb7 27.Rb7 Bb7 28.Ra7 Bc6 29.a4 Ra8 30.Ra8 Ba8 31.Bf6 Bc6 32.a5 Kf8 33.a6 Ke8 34.Kf2 Kd7 35.Bd4 f5 36.Kg3 Kd6 37.Kf4 Ke6 38.Kg5 Bb5 39.a7 Bc6 40.Kh6 Bb7 41.Kh7 Kf7 42.Kh6 Ba8 43.Kg5 Bb7 44.d3 Ba8 45.h4 Bb7 46.h5 gh5 47.Kf5 Ke7 48.Kg5 Bc6 49.c3 Kd6 50.Kh5 Ke6 51.g4 Kd6 52.g5 Ke6 53.g6 Ba8 54.Kh6 Bc6 55.g7 Kf7 56.Kh7 Ke7 57.Bc5 Kd7 58.g8Q Bb7 59.Qb8 Ba8 60.Qa8 d4 61.Qd5 Kc7 62.a8Q dc3 63.Qab7# (63.Qad8#) 1–0. COMP – COMP, Boissel blitz, 2000.

4.e3 Nd7 5.Nd7 Bd7 6.Be2 Nf6 7.0-0 0-0 8.d4 Ne4 9.Nd2 Nc3 10.Qe1 Bf5 11.a3 Ba5 12.Bd3 Bd3 13.cd3 Na4 14.Kh1 Re8 15.Qd1 Qd7 16.Qc2 Bc3 17.Rb1 Qc6 18.Nf3 Re6 19.Qb3 Qb6 20.Bd2 Qb3 21.Rb3 Bd2 22.Nd2 Nb6 23.e4 Rd8 24.e5 Rc6 25.f4 Rc2 26.Nf3 Re8 27.f5 Re2 28.Rc3 c6 29.Rb1 h5 30.h4 Na4 31.Rcc1 Nb2 32.Re1 Rc2 33.Re3 Re7 34.e6 a5 35.Ne5 fe6 36.Ng6 Re8 37.Nf4 Rf8 38.fe6 Rf4 39.e7 Rf8 40.ef8R Kf8 41.Rf1 Kg8 42.Rf5 g6 43.Rg3 Kg7 44.Rfg5 Kf7 45.Rg6 b5 46.R6g5 Rc3 47.Rf5 Ke8 48.Rg8 Ke7 49.Rg7 Ke8 50.Ra7 Ra3 51.Rh5 Ra1 52.Kh2 Rf1 53.Rhh7 Rf7 54.Rhf7 a4 55.Rh7 Nd3 56.Rh8# 1–0. NewRival1_8_29 – Maronti006, GS WinterRapid, 2002.

4.e3 Bf5 5.Bb2 Nf6 6.Bb5 c6 7.Bd3 Be6 8.Nc3 0-0 9.0-0 Re8 10.Rb1 Nbd7 11.Ne2 Ne4 12.Be4 de4 13.Nd7 Qd7 14.Bg7 Bd2 15.Bd4 Ba5 16.Nf4 b5 17.Qh5 Bd8 (17...Ba2?? 18.Qg5 Kf8 19.Bg7 Kg8 20.Bf6 Kf8 21.Qg7) 18.Qh6 f5 19.a4 ba4 20.Rfd1 Bf7?? (Better is 20...Qf7+/–) 21.Qg7 1–0. Gnuchess4 – MacChess 5.0, 2000.

4.e3 f6?? 5.Qh5+– Ke7 6.Qf7 Kd6 7.Qg7 Nh6 (7...fe5 8.Qh8 Bf5+–) 8.Qh6 Ke5 9.Qf4 Ke6 10.Qb4 Nc6 11.Qb3 Na5 12.Qa4 b6 13.Be2 Bd7 14.Qf4 Bc6 15.Ba3 Bb7 16.Bg4 Kf7 17.Bh5 Ke6 18.Qg4 f5 19.Qg7 c5 20.Bf7 Kd6 21.Qh6 (21.Bb2!? d4 22.ed4 Qe7 23.Kd1 Rhf8 24.dc5 Kd7 25.Qd4 Kc8+–) 21...Kc7 22.Nc3 a6 23.Qf4 (23.Rb1!? Nc4 24.Bc5 bc5 25.Rb7 Kb7 26.Bd5 Ka7 27.Bc4 Qc8+–) 23...Qd6 24.Nd5 Bd5 25.Bd5 Raf8 (25...Qf4 26.ef4 Rhe8 27.Kd1+–) 26.Bb2 Kd7 (26...Qf4 27.ef4 Kd6 28.c4+–) 27.Qd6 (27.Qf3!? f4 28.Bh8 Rh8+–) 27...Kd6 28.Bh8 Rh8 29.Bf3 Re8 30.g3 b5 31.d3 1–0. Mairal,Carlos Alberto – Au,Klaus Dieter, CiF, 1989. (=1.Nf3 d5 2.b4 e5 3.Ne5 Bb4)

4.e3 Qf6?? 5.Bb2+/- Nc6 6.Nd3 Qg6 7.Nb4 (better 7.Nf4!? Qh6 8.Nd5+/-) 7...Nb4= 8.Na3 Bf5 9.d3 Ne7 10.g3 0-0 11.Qd2 c5 12.Bc3 (12.Bg2 h5=) 12...a5 (better 12...d4!? 13.Bb2 Qc6-/+) 13.Bg2= Rac8 14.Bb4 (better 14.0-0!?=) 14...ab4=+ 15.Nb1 (better 15.Nb5!?=+) 15...h5 16.a3 b3 (better 16...Qf6 17.Ra2 Ra8-+) 17.0-0? (better 17.cb3 Bd3 18.Nc3-/+) 17...bc2-+ 18.Qc2 Bd3 19.Qd2 Bf1 20.Bf1 Rfd8 21.Bg2 (21.Bh3 Ra8-+) 21...d4 22.Bb7 (22.ed4 cd4 23.a4-+) 22…Rb8 (22...Rb8 23.Bf3 Rb1 24.Rb1 Qb1 25.Kg2 d3-+) 0-1. Darkseid (1735) - booklover (2100), ChessWorld.net, 2010.

4.e3 Nh6 5.Qh5 0-0 6.Nc3 f6 7.Nd5 Bd6 8.Nc4 Bg4 9.Qh4 Be6 10.e4 Bd5 11.ed5 Bc5 12.Ne3 Nd7 13.Bc4 Be3 14.de3 Nf5 15.Qh3 Ne5 16.Bb3 Nd6 17.Bb2 Ndc4 18.f4 Nd3 19.cd3 Nb2 20.Ke2 a5 21.d6 Kh8 22.Rab1 Nd3 23.Bc2 Nf4 24.ef4 f5 25.Bf5 h6 26.d7 Qe7 27.Be6 Rf4 28.Qe3 Rf6 29.Bh3 Qf7 30.Rb2 Rf8 31.Kd1 Qc4 32.Ke1 Rf1 33.Rf1 Rf1 34.Kd2 Qc1 35.Kd3 Rd1 36.Rd2 Qa3 37.Ke2 Re1 38.Ke1 Qe3 39.Kd1 Qg1 40.Ke2 Kh7 41.d8Q Qc5 42.Qd3 Kh8 43.Bf5 Qe5 44.Be4 Qh5 45.Ke1 Qh4 46.g3 Qe4 47.Qe4 Kg8 48.Re2 c6 49.Qg6 c5 50.Re8# 1–0. NewRival1_8_29 – Golem0441, GS WinterRapid, 2001.

5.a3 Bd6 6.e3 0-0 7.Be2 Bf5 8.0-0 c6 9.Bf3 (9.f4 Re8+=) 9...Qc7 10.d4 Nbd7 11.Nd7 Bd7 12.g3 Bh3 13.Re1 Rae8 14.Nd2 b5 15.e4 de4 16.Ne4 Ne4 17.Be4 f5 18.Bd3 Re1 19.Qe1 f4 20.c4 fg3 21.hg3 Qf7 22.cb5 cb5 23.Rc1 Qf3 24.Be4= Qf7 25.Rc6 Qa2 26.Qc3 Qf7+= 27.Qc2 Bg3–/+ 28.Bh7 Kh8 29.Be4 Bf2 30.Kh1 Qh5 31.Rh6 Qh6 32.Bc1 Qh5 33.Bf4 Rf4 34.Qf2 Rf2 35.Kg1 Rf1 36.Kh2 Bg4 37.Kg3 Qh3# 0–1. Chessmaster 2000 A – Plymate 5,5, DatormOte, 1988.

5.e3 Nbd7 6.Be2 Ne5 7.Be5 Bd6 8.Bd6 Qd6 9.0-0 0-0 10.d4 Bf5 11.c4 dc4 12.Bc4 c5 13.Nc3? (better is 13.dc5!? Qc5 14.Qb3=) 13...Ng4–/+ 14.g3 Qh6 15.h4 Ne3! 16.fe3 Qe3 17.Kg2 Qc3 18.Rf5 Qc4 19.Rc5 Qa6 20.Qf1 Qe6 21.Qc4 Qe4 22.Kf2 Rae8 23.Rf1 Qg4 24.Rc7 Re4 25.Kg2?? Re3–+ 26.Rff7 Qg3 27.Kh1 Qh3 28.Kg1 Rg3 29.Kf2 Rg2 30.Ke1 Qe3 (30...Qe3 31.Kd1 Qd2#) 0–1. Langschmidt,Dirk (2100) – Elschner,Gerald (2230), RSLE–2010, 2010.

5.g3 0-0 6.Bg2 Nc6 7.0-0 Re8 8.Nd3 Bf5 9.Nb4 Nb4 10.d3 Qe7 11.e3 (11.Qd2 c5 12.Bf6 Qf6=) 11...Qd6 (11...Bg4 12.Qd2 Nc6 13.Bf6 Qf6 14.Nc3=) 12.a3 Nc6 13.Nd2 Rad8 14.Nf3 a6 15.Qd2 h6 (15...Bg4 16.Nh4=) 16.Rfe1 a5 17.Rab1 b6 18.a4 (18.h3 Qe6+=) 18...Bd7 19.Nd4 (19.h3 Nb8=) 19...Nd4=+ 20.ed4 (20.Bd4!? Ba4 21.Qc3=+) 20...Ba4-/+ 21.c4 (21.Re5 Qc6 22.c4 Qd7-/+) 21...dc4 (21...Bb3 22.c5 Qc6 23.Rec1-/+) 22.dc4 Qb4 (22...Bb3 23.Qc3 a4 24.Ra1-/+) 23.Qb4=+ ab4 24.Ba1 (24.d5 Bc2 25.Ra1 Re1 26.Re1 b5 27.cb5 Nd5-/+) 24...Re1 25.Re1 Bb3 26.c5 (26.Bf1 c5 27.Bd3 Ne8-/+) 26...Bd5 27.Bd5 (27.cb6!? cb6 28.Bb2-/+) 27...Nd5-+ (worse 27...Rd5 28.cb6 cb6 29.Bb2-/+) 28.Rc1 Ra8 29.Kg2 bc5 30.Rc5 c6 31.Bb2 Ra2 32.Bc1 b3 33.Rc6 b2 34.Bb2 Rb2 35.Rc8 Kh7 36.Rd8 (36.Kf3 Rb3 37.Ke2 Nc3 38.Kf1 Nb5-+) 36...Nf6 (36...Ne3 37.Kf3 Nd1 38.g4-+) 37.d5 (37.Kf3 Rb3 38.Kg2 Ne4-+) 37...Kg6 38.Kf3 Kf5 39.d6 (39.h3 Ke5-+) 39...Ng4 40.Kg2 Rf2 41.Kg1 Rd2 42.h3 Nf6 43.Kf1 Ke6 44.Ke1 (44.Rf8 Rd6 45.Rb8 Rc6-+) 44...Rg2 45.g4 Rg4 1-0. zembelek (2055) - Bobby72 (2135), Rated Blitz game, lichess.org, 2014. (=1.Nf3 A00: Irregular Openings 1...d5 2.b4 e5 3.Ne5)

5.g3 0-0 6.Bg2 Re8 7.0-0 Bd6 8.Nf3 Na6 9.d3 Bg4 10.Nbd2 c5 11.Rb1 Rb8 12.Re1 b5 13.e4 d4 14.h3 Bf3 15.Nf3 Bc7 16.Bc1 Ba5 17.Bd2 Nd7 18.Nh4 Bd2 19.Qd2 Nb4 20.a3 Na2 21.f4 Nc3 22.Ra1 a5 23.Nf5 Qb6 24.e5 f6 25.ef6 Qf6 26.g4 g6 27.Nh6 Kg7 28.g5 Qf8 29.Qf2 Kh8 30.Ng4 Qg7 31.Bc6 Re1 32.Re1 Rf8 33.Qf3 a4 34.Kg2 b4 35.Bd7 Qd7 36.Nf6 Qc7 37.f5 ba3 38.Nd5 Nd5 39.Qd5 gf5 40.Rb1 Qf4 41.Kh1 a2 42.Ra1 Rb8 0–1. Peng Zhaoqin – COMP, The Hague 1996.

5.g3 Bf5 6.g4 Ng4 7.Ng4 Bg4 8.c3 Bd6 9.Qb3 Nc6 10.Bg2 0-0 11.Qd5 Re8 12.e4 Qf6 13.d4 Bf3 14.Nd2 Bg2 15.Rg1 Be4 16.Ne4 Qf3 17.Kf1 Re4 18.Qb5 a6 19.Qb7 Qd3 20.Kg2 Rg4 21.Kh1 Qf3 22.Rg2 Qg2 0–1. Puig – Benedetto, corr 1985.

6.c4 Nbd7 7.Nd7= Bd7 8.Be2 (8.Qb3 c5=) 8...Re8 (8...dc4 9.Bc4 b5 10.Bb3=+) 9.0-0 (9.Qb3 Bd6=) 9...a6 (9...Be6 10.Qa4 Bd6 11.Nc3=+) 10.d4 (10.Qb3 Bd6 11.cd5+= (11.Qb7? Rb8 12.Qa6 Rb2-+)) 10...dc4= 11.Bc4 b5 (11...Be6!? 12.Be6 Re6=) 12.Bf7+= Kf7 13.Qb3 Be6 14.Qb4 Nd5 15.Qc5 Nb6 (15...Kg8 16.Rc1+/-) 16.Nc3 (16.e4 Nc4 17.Bc3 Qd6+/-) 16...Nc4+= 17.Bc1 White intends d5 17...Kg8 18.a4 ba4?? (better 18...c6+/-) 19.d5+- (19.Ra4?! Nb6 20.Ra1 Nd7+/-; 19.Na4?! Rb8 20.e4 Rb5+/-) 19...Qg5 (19...Nb6 20.de6 Qe7 21.Na4 Na4 22.Qe7 Re7 23.Ra4 Re6+-) 20.Ne4 (better 20.f4 Qe7 21.Qc4+-) 20...Qe5?? (better 20...Qd5 21.f3 Qc5 22.Nc5 Nb6=+) 21.de6+- (21.Qc4 Bd5 22.Qa4 Qe4 23.Qe4 Be4=) 21...Qe4 (21...Qa1 22.Qc4 Qe5 23.e7 Kh8+-) 22.Ra4 Qe6 23.Qc4 Qc4 24.Rc4 Rec8 25.Ba3 Kf7 (25...a5 26.Ra4+-) 26.Rfc1 (26.Rd1 Rab8 27.Rd7 Kg8+-) 26...Ra7 27.Kf1 Ke6 (27...a5 28.Rf4 Kg8 29.Ra4+-) 28.Ke2 (better 28.Re4 Kf5 29.Re7+-) 28...Kd5 (28...Kf7 29.Rd1 c6 30.Rdc1+-) 29.Kd3 (29.Rc6 Rf8 30.R1c5 Ke4 31.Re6) 29...c6+- 30.Rc5 Ke6 31.Rc6 Rc6 32.Rc6 Kd5 (32...Kd7 33.Rd6 Ke8 34.Rb6+-) 33.Rc5 (better 33.Rd6 Ke5 34.f4 Kf5+-) 33...Ke6 34.f4 Rd7 35.Ke4 Rf7 (35...Kf7 36.Rc6+-) 36.Rc6 Kd7 37.Ra6 Kc8 38.Kf3 (38.Ra8 Kb7 39.Rh8 g6+-) 38...Kb7 39.Ra4 Kc6 40.e4 Rd7 41.e5 Rd3 (41...Kd5 42.Ra5 Kc6 43.e6+-) 42.Ke4 Rd2 (42...Rd8 43.e6+-) 43.g4 (better 43.e6 Rd8 44.Rc4 Kb6+-) 43...Rh2 44.Bd6 g6 45.f5 (45.Rc4 Kb5 46.Rc5 Kb6+-) 45...gf5 46.Kf5 Rf2 47.Ke6 Rf1 48.Rc4 Kb5 49.Rc8 Rf4 50.g5 Kb6 (50...Rf2 51.Rh8 Kc4 52.Rh7+-) 51.Rh8 1-0. Mely (2530) - SnoDawg (2155), ChessWorld.net, 2012.

6.c4 Be6 7.Qb3 Na6 8.Be2 (8.a3 Bd6+=) 8...Re8 9.0-0 Bd6 10.Nf3 Nc5 11.Qc2 dc4 12.Bc4 Bc4 13.Qc4 b5 14.Qc2 (14.Qb5? Rb8 15.Qa5 Rb2–+) 14...Na4 15.Nc3 Nb2 16.Qb2 a6 17.d4 Qe7 18.Qb3 c5 19.dc5 Bc5 ½–½. Partikas,Valentinas A (2325) – Angulo,Ariolfo (2250), ICCF corr W–24ch sf12, 2000.

6.c4 Be6 7.Be2 Qd6 (7...dc4 8.Nc4 Nc6 9.0-0+=) 8.0-0 (8.Nd3 a5+=) 8...Ne4 (8...Qe7 9.a3 Bd6 10.d4=) 9.d4 (9.a3 Ba5=) 9...f6 (9...Nd7 10.c5 Qe7 11.Nd7 Qd7 12.a3=) 10.cd5 (10.Nd3 Na6= (worse is 10...dc4 11.Nb4 Qb4 12.Ba3+/–)) 10...Qd5 (better is 10...Bd5!? 11.a3 Ba5+=) 11.Bc4+/– Qd6 12.Be6 (12.Qb3 Ng5 13.Be6 Ne6 14.Nc4=) 12...Qe6= 13.Nd3 Bd6 14.Nc3 Ng5 (14...f5 15.Nb5=) 15.Re1 (15.Qb3+=) 15...Qf5 (15...f5 16.Qb3 Qb3 17.ab3+=) 16.e4 (16.Qb3 Qe6 17.Qb7 Nd7+/–) 16...Qg6 17.e5?? (better is 17.Bc1 Nf7 18.e5 fe5 19.de5+/–) 17...fe5–/+ 18.de5 Nf3 (18...Nf3 19.Kf1 Ne1 20.Ke1 Re8–/+) 0–1. pumpkin (2405) – rashid (2295), net–chess.com, 2004.

6.Be2 Nbd7 7.Nf3 Nb6 8.0-0 Bd7 9.a3 Be7 10.Nc3 c6 11.Rb1 Re8 12.d4 Bf5 13.Qd2 Nc4 14.Bc4 dc4 15.Rfe1 Ne4 16.Ne4 Be4 17.Ne5 b5 18.f3 Bh4 19.Re2 Bd5 20.e4 Be6 21.Nc6 Qb6 22.Nb4 Rad8 23.c3 a5 24.Nc2 h6 1–0. Bonetti,Shane – MacChess 4.0, 2000.

6.Be2 Re8 7.0-0 Nc6 8.Nc6 bc6 9.c4 Rb8 10.Qc2 Bd6 11.c5 Bc5 12.Qc5 Rb2 13.Qa7 Ne4 14.Qd4 Rb6 15.d3 c5 16.Qa4 Bd7 (16...Ba6 17.a3=+) 17.Qa7 Bb5 18.a4 Ba6 19.Ra2 Nd6 20.Nc3 d4 21.a5 Rc6 (better 21...Nc8!? 22.ab6 Na7 23.ba7 Bb7+=) 22.ed4+= Nc8 23.Qa8 Rh6 24.dc5 Qd4 25.Ne4 f5 (25...Bd3!? 26.Bd3 Qd3+/-) 26.Ng3+- Qc5 (26...Rhe6 27.Bf3 Rd8+-) 27.d4! Qd6 (27...Qd4 28.Nf5 Double attack (28.Ba6 Discovered attack; 28.Nf5 Deflection; 28.Nf5 Decoy)) 28.Qa6 Qa6 29.Ba6 Ra6 30.Nf5 g6 31.Ne3 Rd8 32.d5 (32.Rc1!? Nd6+-) 32...Ne7 33.Rd1 c6 (33...Rb8 34.Ra4+-) 34.d6 Nc8 (34...Nd5 35.Nd5 cd5 36.Rd5 Rdd6 37.Rd6 Rd6 38.f4+-) 35.Nc4 c5 36.Rad2 Na7 (36...Rd7 37.g4+-) 37.Rd5 Rc6 (37...Nb5 38.Rc5 Nd6 39.Rcd5 Nc4 40.Rd8 Kf7 41.R8d4+-) 38.Rb1 Kf8 39.Rb7 Nc8 40.Rh7 (40.Rb8!? Re8 41.Kf1 Nd6 42.Rd6 Rcc8 43.Rc8 Rc8+-) 40...Kg8 41.Rb7 (41.Rh6 Kg7 42.Rg6 Kg6 43.Ne5 Kf6 44.Nc6 Rd6 45.Rd6 Nd6+-) 41...Nd6 42.Rb1 Kg7 43.Rbd1 (43.Ne5!? Rcc8+-) 43...Nc4 44.Rd8 Ra6 (44...Na5 45.h4+-) 45.Ra1 Na5 (45...Ra5 46.Ra5 Na5+-) 46.Kf1 Kf6 47.Rd5 1-0. Iyti,B (2255) - Khader,Sam (2405), 43rd Olympiad, 2018.

6.Be2 Re8 7.0-0 Bd6 8.f4 Nbd7 9.d4 Ne4 10.c4 c6 11.cd5 cd5 12.Qb3 (12.Bh5 g6 13.Bf3 Ndf6+=) 12...Ndf6+= 13.Ba3 Re7 14.Bd6 Qd6 15.Rc1 Bf5 16.Nc3 Nc3 17.Rc3 Ne4 18.Rc2 ½–½. Poleschi,Ricardo D – Vujadinovic,Milan, Eclipse IIIEC2000700B email, 2000. (=1.Nf3 d5 2.b4 e5 3.Ne5 Bb4 4.Bb2 Nf6)

5.Qb3 Bd6=+ 6.Bb2 f6 7.Nf3 dc4 8.Qc4 a6 (8...Nd7 9.e4=+) 9.d4 b5 10.Qc2 Nbc6 11.a3 (11.e4 Nb4 12.Qc1 Nbc6=) 11...0-0 12.e3 Bf5 13.e4 Bg6 14.Bd3 Bf4 15.Nbd2 (15.Qb3 Bf7 16.Qc3 Be6=) 15...Bh5 (15...f5 16.e5=) 16.Nb3 (16.Qc3 Qd6=) 16...Bf3 (16...f5 17.Rb1=+) 17.gf3 Qd6 (17...Re8 18.Rd1=) 18.Rd1 f5 19.ef5 (better is 19.Nc5=) 19...Rae8–/+ 20.Kf1 Qh6 21.h4 Nb8 22.Nc5 Nd5 23.Ne6 Rf7 24.Re1 Nf6 25.Re2 Nbd7 26.a4 Rb8 27.Qc6 Nb6 28.ab5= ab5 29.Qb5 Kh8 30.Qb3 Rd7 31.Kg2 Nfd5 32.Be4 c6 33.Qc2 Rc8 34.Ba3+/– Rb7 35.Bc5 Rcb8 36.Bb6 Rb6+= 37.Bd5 cd5= 38.Qc5 Rd6 (38...Rb5 39.Nd8!? Rd8 40.Qb5 Qh5+–) 1–0. Krasny,Henryk Jan – Steinmann,Joachim, corr or01–002 E–mail, 2001.

5.cd5 Qd5 6.Nd3 Bd6 =.

5.Ba3? Ba3–+ 6.Na3 Qe7 7.Nf7 (7.Nac4 dc4 8.Nc4 0-0–+) 7...Qf7 8.Bb5 c6 9.Be2 Be6 10.0-0 0-0 11.f4 (11.d4 Ne4–+) 11...Na6 (11...Qe7!? 12.Nb1–+) 12.Ba6 ba6 13.f5 Bd7 14.Rb1 Rab8 15.Rb8 Rb8 16.Qe2 Bc8 (16...Rb2 17.Qa6 Ra2 18.Qd3–+) 17.c4 Rb2 18.cd5 (18.Qd3 Ne4 19.cd5 cd5–+ (19...Bf5?! 20.Nc4 Rb8 21.dc6=+)) 18...Ra2 (18...Qd5 19.Nc4 Rc2 20.Rf4 Rc1 21.Kf2 Ne4 22.Re4 Qe4 23.Nd6–+) 19.dc6 (19.Nb1 cd5 20.Nc3 Rb2–+) 19...Ra3 20.e4 Ra4 21.d3 Rb4 22.Qd1 Rb2 23.Rf2 Qb3 24.Qb3 Rb3 25.Rc2 Rd3 26.Rc4 Re3 27.e5 Re5 28.g4 Re4 29.Re4 Ne4 30.Kf1 Nf6 31.h3 Nd5 32.Ke2 Ne7 33.c7 Nd5 34.Kd3 Kf7 35.Kd4 Nc7 36.Kc5 a5 (37.Kd6 Nb5 38.Kc5 a6–+) 0–1. GrandMasterChess – SuperForte, 1994.

5.Bb2 c6 6.c4 Be6 7.Qb3 Qb6 (7...Qe7 8.Nd3 dc4 9.Qb4 cd3 10.Qe7 Ke7 11.Bd3=) 8.Nc3 (8.cd5 Bd5 9.Nc4 Qb5+=) 8...Bd6 9.Qb6 ab6 10.cd5 Nd5 11.Ne4 Be7 12.a3 b5 13.Be2 f6 14.Nf3 Nd7 15.Nd4 Bf7 16.Nf5 0-0 17.Ne7 Ne7 18.d4 Bd5 19.Bf3 Nb6 20.Bc3 f5 21.Nc5 Bf3 22.gf3 Ned5 23.Bd2 Nc4 24.Nb7 Na3 25.Ke2 Nc4 26.Nc5 Nd2 27.Kd2 Rfd8 28.Rhb1 Nb6 29.Kc2 Kf7 30.Nb7 Rdb8 31.Nc5 Rd8 32.Nb7 Rdb8 ½–½. Liepert,Luise – Bauer,Stephanie, Bayern–ch (Women), 1989.

5.c4 0-0 6.Bb2 Bf5 (6...Re8 7.cd5 Nd5 8.Qb3=) 7.Qb3= Na6 8.cd5 Qd5 (8...Nd5 9.Ba6 ba6 10.–0+=) 9.Qd5+= Nd5 10.Bc4 Nb6 11.Ba6 ba6 12.Ke2 Bd6 13.Nf3 Rfd8 14.Rc1 c5 15.d3 Na4 16.Bc3 Bc7 17.d4 Bb6 18.dc5 Nc5 19.Bd4 Ne6 20.Bb6 (20.Be5 f6 21.Bc3 Rd7=) 20...ab6 21.Nbd2 Nc5 22.Nd4 Bd3 23.Ke1 Rac8 24.a4 Bg6 25.Ke2 f6 26.Ra3 Re8 27.Kd1 a5 28.h3 Rcd8 29.Rcc3 Bf7 30.g4 Be6 31.Ne6 Ne6 32.Kc2 Nc5 33.f3 Rc8 34.h4 Kf7 35.e4 Ne6 36.Nc4 Rc6 37.Kd2 Kf8 38.Ne3 Rd6 39.Rd3 Nd4 40.Kd1 Rdd8 41.Nd5 Nf3 42.Rf3 Re4 43.Rfd3 Rg4 44.h5 ½–½. grandma (2020) – darkone1uk (1695), gameknot.com, 2007.

5.Be2 Nbd7 6.Nf3 0-0 7.0-0 Qe7 8.Bb2 c6 9.a3 Bd6 10.c4 dc4 11.Bc4 Nb6 12.Be2 Bg4 13.d3 Rad8 14.Nbd2 Nbd5 15.Re1 Bc7 16.Qc2 Rfe8 17.Bf1 Ba5 18.Ne5 Bh5 19.g3 Nd7 20.Nec4 Bc7 21.e4 Nf4?? (better is 21...N5f6=) 22.gf4+– Bf4 23.Bg2 Qg5 24.Nf1 (24.d4!? Nb6 25.Ne3 Bg6+–) 24...Nc5+/– 25.Ng3 (better is 25.d4!? Ne6 26.Rab1+/–) 25...Nd3= 26.Rf1 Qc5 27.Qc3?? (27.Nf5 f6 28.Bc1=) 27...Nb2–/+ 28.Qb2 Bg3 (28...Qc4?! 29.Nh5 Be5 30.Qc1=) 29.hg3 Qc4 30.Qb7 Qa4 31.Rfc1 Bg6 32.Rc6 Rd1 (32...Be4!? 33.Be4 Qe4+=) 33.Rd1= Qd1 34.Bf1 h6 (worse is 34...Be4 35.Rc8 Qa4 36.Qa7+=) 35.Qa7 (better is 35.Rc8!? Rc8 36.Qc8 Kh7 37.Qc4–/+) 35...Be4–/+ (worse is 35...Re4 36.Qa8 Kh7 37.Rc8=) 36.Rc3 Bf3?? (better is 36...Qh5!? 37.f3 Bf3–/+) 37.Re3?? (better is 37.Rd3 Qe1 38.Rf3+–) 37...Re3 38.Qe3 Bc6 39.Qd3 Qd3 40.Bd3 Kf8 41.Kf1 Ke7 42.Ke2 Kd6 43.Ke3 Ke5 44.f4 Kd6 45.Kd4 g5 46.Be2 gf4 47.gf4 Ba4 48.Bh5 f6 49.Bf3 Ke6 50.Bg4 Kd6 51.Kc4 Be8 52.Kd4 Ba4 53.Bf3 Ke6 54.Be4 Kd6 55.Kc4 Bd1 56.Kb4 h5 57.Kc4 h4 58.Kd4 Ba4 59.Ke3 Kc5 60.Kf3 Kd4 ½–½. Grigoriadis,Alexandros (2335) – Tepelenis,Nikolaos (2260), Nikaia op, 2009. (=1.Nf3 d5 2.b4 e5 3.Ne5 Bb4 4.e3 Nf6)

6.c4 Nbd7 7.Be2 Ne5=+ 8.Be5 dc4 9.Bc4 Ng4 10.Bg3? Qf6–+ (10...Qf6 11.0-0 Qa1–+) 0–1. pumpkin (2340) – cliff (2500), net–chess.com, 2009.

6.0-0 Bf5 7.Bb2 Re8 8.Bh5 Nh5 9.Qh5 g6 10.Qh6 f6 11.Qh4 Be7 12.Ng4 Kg7 13.Qh6 Kh8 14.Qf4 c5 15.Nh6 Qb6 16.Nf5 Qb2 17.Ne7 Re7 18.Nc3 Rf7 19.Rfc1 d4 20.ed4 Qb4 21.Ne2 g5 22.Qe3 c4 23.Qe6 Kg7 24.Nc3 Nc6 25.Rab1 Qf8 26.Qc4 Rd7 27.d5 Ne5 28.Qe4 Rc8 29.Nb5 Rc4 30.Nd4 Qa3 31.Ne6 Kg8 32.Qf5 Rg4 33.d3 Rf7 34.Ra1 Qd6 35.c4 Rh4 36.g3 Rh6 37.d4 Ng6 38.c5 Qb8 39.d6 Qc8 40.Re1 Nf8 41.Qd5 Ne6 42.Re6 Kf8 43.Rae1 Rg6 44.Re7 Re7 45.Re7 Rg7 46.d7 Qd8 47.Re8 Qe8 48.Qd6 Re7 49.Qf6 Kg8 50.de8Q Re8 51.Qg5 Kh8 52.Kf1 a6 53.Qd5 Rf8 54.Qb7 h5 55.c6 (55...a5 56.c7+–) 1–0. Crafty 11.13 – MacChess 4.0 exa, 2000.

3.a3 b5 4.e3 a6 5.Be2 f6 6.Nc3 Bd6 7.0-0 c5 8.bc5 Bc5 9.d4 Bd6 10.e4 Bb7 11.e5 fe5 12.de5 Bc5 13.Bg5 Qc7 14.Re1 h6 15.Bf4 d4?? (better is 15...Ne7+=) 16.Ne4?? (better is 16.Nd4 Qf7 17.Be3 Bd4 18.Qd4+–) 16...Be4–+ 17.Nh4? (17.Nd4 Bd5 18.Bh5 Kf8–/+) 17...Qe7?? (17...Bd5 18.Bh5 Kd8 19.Ng6–+) 18.Bg3? (18.Bh5 Kd8 19.Re4 Qh4 20.Rd4 Kc8–/+ (20...Bd4 21.Qd4 Kc7 22.Qd6 Kb7 23.Bf3 Kc8 24.Qe6 Nd7 25.Ba8 Qf4 26.Rd1+–)) 18...Nc6?? (18...Bh7 19.a4 b4 20.Bh5 Kd8 21.Bg6–+) 19.Bf3?? Bf3–+ 20.Qf3 0-0-0?? 21.a4?? Qb7–/+ 22.ab5 ab5 23.Ng6 Rh7 24.Ra2 Bb4 25.Rb1= Qb6?? 26.Ra8 Nb8? 27.Rb4+– h5 28.h3 Rd7 29.Nf8 Rd8 30.Nh7 Qc5 31.Rb2 Rd7 32.Nf8 Rd8 33.Ne6 Qe7 34.Rb5 Kd7 35.Rb7 Ke6+– 36.Re7 Ke7 37.Bh4 Ke8 38.Bd8 Kd8 39.Rb8 Kc7 40.Qb7 1–0. pieeater – Pekin Dragons, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6)

3.a3 c6 4.e3 Qf6 5.Nc3 e5 6.Bb2 e4 7.Nd4 Qg6 8.d3 Nf6 9.Nde2 ed3 10.cd3 Bd6 11.Ng3 h5 12.e4 h4 13.Nf5 Bf5–/+ 14.ef5 Qf5 15.Be2 Nbd7 16.h3 Kf8 17.Kf1 Re8 18.d4 a6 19.Rc1 Nb6 20.Rc2 Ne4 21.Ne4 de4 (21...Re4?! 22.Bd3=) 0–1. Ivanets,Vladimir (2280) – Dobrev,Nanko (2405), Moscow, 2006.

3.a3 d5 4.Bb2 Be7 5.e3 c5 6.bc5 Bc5 7.Bb5 Bd7 8.a4 a6 9.Be2 0-0 10.0-0 Be7 11.d3 Qb6 12.Bc3 Nc6 13.a5 Qc7 14.Nbd2 Rac8 15.Re1 Nb4 (15...e5 16.Rb1=+) 16.Be5 (16.Nb1 Rfd8=) 16...Qc2=+ 17.Nd4 Qd1 18.Red1 Nc6 19.f4 Nd4 20.Bd4 Rc2 21.Rac1 Rfc8 22.Rc2 Rc2 23.Bf3 Bb5 24.Nb3 Nd7 25.e4 de4 26.de4 Nc5 (better is 26...Ba4 27.Rd3 Bb3 28.Rb3 Bc5–/+) 27.Bc5+/– Rc5 28.Nc5 Bc5 29.Kh1 h6 30.Rd8 Kh7 31.e5 Be7 (31...Bb4!?+/–) 32.Ra8 Bd3 33.Bb7 (33...Bb4 34.Ba6+–) 1–0. Trkn – nigelcrabb, ICC, 2004.

3.a3 f6 4.h4 e5 (4...Nh6 5.Nc3=) 5.h5 (5.Nc3 Be6=) 5...Be6 6.Nh4 (6.e3 Nc6=+) 6...Bd6 (6...Nh6 7.Nc3-/+) 7.d3 (7.Nc3 a5 8.ba5 Nc6=+) 7...Ne7 (7...g5 8.Nf3=+) 8.e4 (8.c4 dc4 9.dc4 Bc4-/+) 8...d4 (8...c5 9.ed5 Nd5 10.c4=+) 9.c4=+ c5 10.Be2 (10.bc5 Bc5 11.Be2 Nbc6=) 10...b6 (10...cb4!? 11.0-0 Nbc6-/+) 11.Bg4 Qd7 12.f3 (12.Be6!? Qe6 13.bc5 bc5 14.h6=) 12...Bg4 13.fg4 h6 (13...cb4 14.0-0-/+) 14.Nf5 Nf5 (worse 14...cb4 15.Ng7 Kf7 16.Nf5 Nf5 17.gf5=) 15.gf5 Nc6 (better 15...cb4!? 16.ab4 Bb4 17.Bd2 Qd6-/+) 16.b5= Nd8 17.a4 Nf7 (17...0-0 18.0-0=) 18.a5+= 0-0 (18...ba5 19.Ra5 0-0 20.Ra6+=) 19.a6 Ng5 20.Nd2 Qf7 (20...Rac8 21.Kf2+/-) 21.Kf2+/- Rfd8 22.Kg3 Kf8 23.Kg4 Ke7 24.Qe2 Rh8 25.Ra2 Kd7 26.Nf1 Kc7 27.Nh2 Qe7 28.Nf3 Qf7 29.Nh4 (29.Bg5?! hg5 30.Raa1 Rh6+=) 29...Qd7 30.Ng6 Rhf8? (30...Rh7 31.Kg3+/-) 31.Bd2 (better 31.Nf8!? Rf8 32.Qf2 Kd8+-) 31...Rf7+/- 32.Qe1 Re8 33.Ra1 Kb8 34.Ba5?? (better 34.Kg3+/-) 34...Bc7?? (better 34...ba5 35.Qa5 Bc7-+) 35.Bd2= Qd8 (35...Bd6 36.Kg3 Qc8+/-) 36.Bg5 (36.Kg3 Qd7+/-) 36...fg5+/- 37.g3 Rf6 38.Qf2 Ref8? (38...Qd7 39.Kh3+/-) 39.Rhf1 (39.Nf8 Rf8 40.Kf3 Qd7+-) 39...Qd7? (39...Rg8 40.Kf3+/-) 40.Qe2 (40.Nf8 Rf8 41.Kh3 Kc8+-) 40...Kc8 (40...Rg8+/-) 41.Rf3?? (41.Nf8 Rf8 42.Rf2 Kd8+-) 41...Qd6? (41...Rg8 42.Kh3+=) 42.Raf1 (42.Nf8 Qf8 43.Qb2 Kd7+-) 42...Kb8? (42...Rd8 43.Qd2+=) 43.Kh3 (43.Nf8 Qf8 44.Qd2 Qf7+-) 43...Kc8 (better 43...Re8!?+/-) 44.Nf8+- Qf8 45.Kg4 Qf7 46.R1f2 Qf8 47.Rh2 Qf7 48.Qe1 Qf8 49.Rff2 Qf7 50.Rf1 Qf8 51.Rhf2 Qf7 52.Qe2 Qf8 53.Kh3 Qf7 54.Kg2 Qf8 55.g4 (55.Rb1 Kd8+-) 55...Qf7 56.Rf3 Qf8 57.Rg3 Qf7 58.Rh3 Qf8 59.Qd2 Qf7 60.Qc1 Qf8 61.Qd2 Qf7 62.Qe1 Qf8 63.Qe2 Qf7 64.Rf2 Qf8 65.Rhf3 Qf7 66.Qd2 Qf8 67.Qc1 Qf7 68.Qg5?? (better 68.Ra2+-) 68...hg5-+ 69.Rh3 Qg8 70.h6 (70.Rh1 Bd6-+) 70...Rh6 71.Rff3 1-0. Lance5500 (2425) - Jaguar_26 (2000), lichess.org, 2016. (=1.Nf3 d5 2.b4 e6 3.a3 f6)

3.a3 g6 4.Bb2 Nf6 5.h4 h5 (5...Bg7 6.e3=) 6.e3 Bd6 7.c4 (7.Be2 Nbd7=) 7...Nbd7 (7...0-0 8.c5 Be7 9.Be2=) 8.c5+= Be7 9.d4 Ng4 (9...a5 10.b5+=) 10.b5 (10.Bd3 c6+=) 10...Ndf6 (better is 10...0-0=) 11.g3?? (11.Nc3 0-0+=) 11...a6 (better is 11...Ne4!? 12.Ne5 Ngf2–/+) 12.Be2 (12.ba6 ba6 13.Ne5 Ne5 14.de5 Ne4=+) 12...ab5 13.Bb5 Bd7 14.Qb3 c6 (14...Ra7!?=) 15.Bd3+= Ne4 16.Be4 de4 17.Nh2 Nh2 18.Rh2 0-0 19.a4 Qc7 20.Nd2+= Bh4?? 21.Rh4+– Rfb8 22.Ne4 b6 23.Qc3 Re8 24.d5! e5 25.Nf6 (25...Kg7 26.cb6+–) 1–0. clochard (2200) – amiller (1980), net–chess.com, 2005.

3.a3 h6 4.Nc3 c5 5.e4 d4 6.Na4 cb4 7.ab4 Bb4 8.c3 dc3+= 9.dc3 Qd1–/+ 10.Kd1 Be7?? (better is 10...Ba5–/+) 11.Nb6!!+– ab6 12.Ra8 Bd6 13.Kc2 (13.e5 Bc7+–) 13...Na6 (13...Bc7+–) 14.Rc8 (14.Rc8 Kd7 15.Ra8+–) 1–0. pierret@chesscube.com – blendi1995@chesscube.com, ChessCube Game, 2011.

3.Ba3 Nf6 4.d4 Nc6 5.c3 Be7 6.b5 Na5 7.e3 Bd7 8.Be7 Qe7 9.a4 Ne4 10.Bd3 0-0-0 11.Be4 de4 12.Nfd2 f5 13.c4 g5 14.c5 e5 15.Qe2 (15.b6 ab6 16.cb6 ed4 A) 17.ed4? e3–+ (17...cb6?! 18.Nc3+=); B) 17.bc7 Kc7 18.Qc2 Bc6 19.0-0+=) 15...ed4–/+ 16.ed4 Be6 17.Na3 (17.b6 a6–/+) 17...Rd4 18.Nc2 Rdd8 19.c6 b6 20.0-0 h5 21.Rab1 g4 22.g3 (22.Rbd1!?–/+) 22...h4–+ 23.Rbe1 hg3 24.fg3 Rh3 25.Rf2 Rdh8 (better is 25...Qc5!? 26.Ne3 Kb8–+) 26.Nd4–/+Kb8 (26...Qd6!? 27.Ne6 Qe6 28.Ne4 fe4 29.Qe4 Qe4 30.Re4 a6 31.Rg4 R3h5+=) 27.Ne4= (27.Nf5? Bf5 28.Rf5 Rh2 29.Qh2 Rh2 30.Re4 Qd8 31.Kh2 Qd2 32.Kg1 a6–+) 27...fe4 (better is 27...Bc8 28.Nd2 Qh7=) 28.Qe4+– Nc4 29.Qe6 Qh7?? (29...Qe6 30.Re6 R3h5+–) 30.Qe8!! Re8 31.Re8 1–0. delightful_porridge – pieeater, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6)

3.b5 b6 4.e3 a6 5.Bb2 Bb7 6.a4 Qd6 (6...Nf6 7.Be2=) 7.Be2 e5? (better is 7...Nd7=) 8.Be5+– Qe6? (better is 8...Qd8!?+–) 9.Bc7 Nd7 10.Bg3 Ngf6 11.0-0 h5 (11...Bc5+–) 12.Nd4 Bc5 (12...Qe7+–) 13.Ne6 fe6 14.d4 Bd6 (14...h4 15.Bf4 Bb4+–) 15.Bd6 g5 16.Nd2 Kf7 17.f4 (17.Nf3 Ne4 18.Ne5 Ne5 19.Be5 Nf6+–) 17...g4 18.c4 Ne4 19.Ne4 de4 20.Be5 (20.c5 ab5 21.ab5 Ra1 22.Qa1 Ra8+–) 20...Ne5 21.fe5 Ke7 22.d5 ed5 23.cd5 Rhd8 24.Bc4 ab5 25.ab5 Ra1 26.Qa1 h4 27.d6 Kd7 28.Rf7 Kc8 29.Qa7 Rd7 30.Be6 Kd8 31.Rf8 1–0. nordlicht (2115) – harzer, gameknot.com, 2006.

3.b5 Bd7 4.a4 a6 5.ba6 Na6 6.c3 Bd6 7.e3 Nf6 8.Qb3 (8.d4!?+=) 8...Nc5–/+ 9.Qc2 Ba4 (9...Ra4 10.Ba3–/+) 10.Qb2? (better is 10.Ra4 Na4 11.Bb5 c6 12.Ba4=) 10...Nb3?? (better is 10...0-0–/+) 11.Ra4!+– Ra4 12.Bb5 (12.Qb3?! Ra7=) 12...c6 13.Ba4 Nc1 14.Qc1 0-0 15.0-0 Ne4 16.d3 Nc5 17.Qd1 Qa5 18.Bc2 Rb8 19.d4 Ne4 20.Be4 de4 21.Nfd2 f5 (21...Qg5 22.f4 Qg6 23.Qc2+–) 22.Nc4 (22.Qb3!? Kf7+–) 22...Qd8 23.Nd6 Qd6 24.Nd2 Qa3 25.Qb3 Qe7 26.Nc4 b5 27.Na5 Qd7 28.Nc4 Qd5?? 29.Na5 Qd6?? 30.Qd1 Qa3 31.Nc6 Rc8 32.Ne5 Qc3 33.Qa1 Qa1 34.Ra1 Rb8 35.Nd7 Rb7 36.Ra8 Kf7 37.Nc5 Rb6 38.Ra7 Kf6 39.Nd7 (39.Nd7 Kg5 40.Nb6+–) 1–0. Sundfar – Grunert, playchess.de, 2005.

3.Nc3 Bb4–/+ 4.e4 Bc3 5.Bb5?? (better is 5.dc3 de4 6.Qd8 Kd8 7.Ng5–/+) 5...c6–+ 6.ed5 (6.dc3 cb5 7.ed5 Qd5 8.Qd5 ed5–+) 6...Qd5 (better is 6...Ba1 7.dc6 Nc6 8.0-0–+) 7.0-0 (7.dc3 Qb5 8.Qd3–+) 7...Ba1 8.d4 (8.Be2 Qa2 9.d4 Nf6–+) 8...Qb5 9.Bf4 Bc3 10.Bd6 Nd7 11.Ng5 Qd5 (better is 11...Qg5 12.Qd3 Qd2 13.Rd1 Qd3 14.Rd3–+ (14.cd3?? Bd4 15.Re1 Ngf6–+)) 12.Qh5 Nh6 13.Be5 Nf6 (better is 13...Ne5!? 14.de5 Be5 15.Rd1 Qa2 16.Qe2–+) 14.Bf6 Bd4 (better is 14...gf6 15.Ne6 Be6 16.Qh6 Bd4 17.a3–+) 15.Bd4 0-0 (15...Qd4!? 16.Qe2–+) 16.Bg7 (16.Rd1 Qf5 17.Qh4 Qc2–+) 16...Kg7 17.Qh4 Qf5 (17...f6 18.Ne4–+) 18.Qd4 (18.Ne4 f6–+) 18...f6 19.h4 (19.Ne4 Qd5 20.Rd1 Qa2–+) 19...e5 20.Qd6 fg5 21.hg5 Qg5 22.Qc7 Kg6 23.Qa5 Bh3 24.Qd5 cd5 25.g3 Bf1 26.Kf1 Qc1 27.Kg2 Qc2 28.Kh3 Rf2 29.g4 Rh2 30.Kg3 Qf2 0–1. interloper – MARYMARY, ChessWorld.net, 2011.

3.Ne5? Bb4–/+ 4.h4 (4.e3 Nf6–/+) 4...Qf6 5.Nd3 Qa1 (better is 5...Bd6–/+) 6.Nb4?? (better is 6.Bb2 Qa2 7.Bg7–/+) 6...Qb1–+ 7.c3 Qf5 (7...c5 8.Qc2 Qa1 9.Nd3–+) 8.d4 Bd7 9.g3 h6 10.Bf4 c6 (10...c5 11.dc5 Nc6 12.Qd3–+) 11.Bd6 Nf6 12.Bh3 (12.f3 Qh7–+) 12...Qg6 13.f3 h5 14.Nd3 Qh7 15.Ne5 Ng8 16.f4 (16.c4 Ne7–+) 16...Qe4 17.Rh2 (17.Rf1 f6 18.Nd3 b6–+) 17...f6 (better is 17...Qe3!? 18.Nf3 Qc3 19.Qd2 Qa1 20.Kf2–+) 18.Nf3 Ne7 19.Be7 Ke7 20.Nd2 (20.Kf2 Na6–+) 20...Qg6 (20...Qe3!? 21.Nf3 Qc3 22.Kf1–+) 21.Rg2 b5 22.a3 a5 23.Nb1 (23.a4 e5 24.Bd7 Nd7 25.ab5 cb5–+) 23...e5 24.Bd7 Nd7 25.de5 fe5 26.e3 (26.Qd3 Qd3 27.ed3 Rhf8 28.fe5 Ne5–+) 26...Qe4 27.Rg1 (27.Kf2 Nf6 28.Qc1 Ng4 29.Kg1 Rhe8 30.fe5 Qe5–+) 27...Qe3 28.Kf1 g6 (better is 28...ef4 29.Qd4–+) 29.fe5 (29.Kg2 Nf6–+) 29...Rhf8 30.Kg2 Rf2 (30...Rf2 31.Kh3 Qe4–+) 0–1. rgp – raymac, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6)

4.b5 a4 5.e3 c5 6.c4 Nf6 7.Nc3 Qa5 8.Bb2 Nbd7 9.cd5 ed5 10.Bd3 c4 (10...Bd6 11.0-0=) 11.Bc2 Nc5 12.Rb1 Bd7 13.Nd4 Nb3 14.Qf3 (14.Nb3? ab3 (14...cb3?! 15.Bd3=) 15.Bb3 cb3 16.Qb3 Be6–+ (16...Ba3 17.Ra1+/–); worse is 14.Bb3 ab3 15.Qf3 Bg4+=) 14...Bc5 (14...Nd4 15.ed4 Bb5 16.Nd5 Nd5 17.Qd5=) 15.Bb3 ab3 16.Nd5 Nd5 (better is 16...Bd4 17.Bd4 Nd5 18.Qd5 Qb5+=) 17.Qd5+/– Ba3 18.Ra1 (18.Qc4 Bb2 19.Nb3 Qa2 20.Qe4 Be6–+) 18...Qb4? (better is 18...Bb2!? 19.Ra5 Ra5 20.Qe5 Kd8+–) 19.0-0 Ra7 (19...Ra4 20.Ba3 Ra3 21.Qb7+–) 20.Qe5 Be6 (20...Kf8+–) 21.Ne6 fe6 22.Qb8 Kf7 23.Qc7 Qe7 24.Qe7 Ke7 25.Ba3 Kd7 26.Rfc1 Rc8 27.Kf1 Ra5 28.Bb2 Rb5 29.Ke2 Kd6 30.d3 cd3 31.Kd3 Rd5 32.Ke4 Rc2 33.Ba3 Kd7 34.Rab1 Rf2 35.Rb3 b5 36.g3 Rh2 37.Rbc3 g5?? 38.Rc7 Ke8 39.R1c6 Rd7 40.Re6 Kd8 41.Rc5 Ra7 42.Bb4 Rb7 43.Kf5 g4 44.e4 Rh3 45.Bd2 b4 46.Kg4 b3 47.Bg5 Kd7 48.Re7 Kd6 49.Rb7 Kc5 1–0. Cortijo Dominguez,D – Alonso Centeno,JJ, Valladolid CC Seniors–Juniors, 1994.

4.b5 c5 5.bc6 Nc6 6.e3 Bd6 7.d4 Nf6 8.Be2 Bd7 9.Bb2 (9.Nbd2 0-0=) 9...Ne4 (9...Rc8 10.Nbd2=) 10.Nbd2 f5 (10...Qb6 11.Rb1 Nd2 12.Nd2=) 11.c4 Ne7 (11...b6 12.Ne5+=) 12.0-0 0-0 13.Ne4 de4 (13...fe4 14.Ne5+=) 14.Ne5 Bc6 15.Nc6 bc6 16.f4 (better 16.Rb1!?+=) 16...ef3=+ 17.Rf3 ½–½. Uddin,Md Saif (2070) – Soumik,Datta (1695), Dhaka Bangladesh, Walton Open, 2018. (=1.Nf3 d5 2.b4 e6 3.a3 a5)

4.b5 c5 5.bc6 Nc6 6.e3 Bd7 7.d4 Bd6 8.c4 Nf6 9.c5 Bb8 10.Nbd2 0-0 11.Rb1 Qc7 12.h3 Re8 13.Qb3 Nd8 14.Bd3 Bc6 15.Ne5 Nd7 16.f4 Ne5 17.fe5 (17.de5?! Qe7=) 17...f6 18.Nf3 fe5 19.Ne5 Qe7 20.0-0 (better is 20.Nc6!? Bg3 21.Kd1 bc6 22.Rf1=) 20...Be5+= 21.de5 Qc5 22.Bb2 Qe3 23.Kh1? (better is 23.Kh2!? Qg5 24.Bd4+=) 23...d4–+ 24.Bh7? (better is 24.Kh2 Qe5 25.g3–+) 24...Kh7 25.Qe3 de3 26.Bd4 e2 27.Rfe1 Be4 28.Rb3 Bc2 29.Rg3 Bd1 30.Rd3 Rf8 31.Rf3 Rf3 32.gf3 Nc6 33.Bc5 (33.Bb2–+) 33...Ne5 34.Kg2 Nd3 35.Bf2 Ne1 36.Be1 Rf8 37.Ba5 0–1. Schanilec,L – Krnak,V, Prague Cedok op, 1996. (=1.Nf3 d5 2.b4 e6 3.a3 a5)

4.b5 c6 5.a4 cb5 6.ab5 b6 7.e3 Nd7 8.d4 Ngf6 9.Bd3 Qc7 10.Bb2 Bd6 11.Nbd2 Bb7 12.0-0 0-0 13.c4 Rfc8 14.h3 Ne4 15.cd5 ed5 16.Rc1 Qd8 17.Rc8 Rc8 18.Qb1 f5 19.Rc1 Rc1 20.Qc1 Qc7 21.Qc7 Bc7 22.Ba3 Bd8 23.Nb1 Kf7 24.Ne1 Be7 25.Be7 Ke7 26.f3 Nd6 27.Nc3 g6 28.g4 Kf6 29.Ng2 g5 30.Kf2 h6 31.Ne1 Ba8 32.Nc2+= Bb7 33.gf5 Nf5 34.e4 Ne7 35.Ne3+/– Ke6 36.Na4 Kd6 37.Kg3 Kc7 38.Nc3 de4 39.fe4+= Nf6 40.Nc4 Ng6 41.d5 Nd7= 42.Bc2 Nge5 43.Ne3 h5 44.h4 g4 45.Kf4 Nf3 46.Nf5 Bc8= 47.Ng7 Nh4 48.e5 Ng2–/+ 49.Ke4 Nc5 50.Kd4 h4 51.e6 Kd8 52.Ne2 a4 53.Ke5 Ne3 54.Bb1 h3 55.Ng3? a3 56.Ba2 Bb7?? 57.d6 Ne6 58.Ne6 Ke8 59.Nc7 Kd8= 60.Ne6 Ke8 61.Nd4 Bc8 62.Be6+/– Be6?? 63.Ke6+– (63.Ke6 Nc4 64.d7 Kf8 65.d8Q Kg7 66.Ndf5 Kh7 67.Qe7 Kg6 68.Qg7#) 1–0. Santasiere,Anthony – Burdge,Harold, Ventnor City, 1940.

4.b5 c6 5.a4 Bd7 6.Na3 (6.e3 cb5 7.ab5 Nf6=) 6...Nf6 7.Bb2 (7.e3 Bd6=) 7...g6 (better 7...Ba3!? 8.Ba3 cb5 9.ab5 Bb5-/+) 8.e3+= Bg7 9.c4 0-0 10.c5 cb5 11.ab5 Ne4 (11...Qe7 12.Bd4=) 12.Bg7+= Kg7 13.d4 Qe8 (13...a4!? 14.b6 f6+=) 14.Bd3+/- Nc3 (14...f6 15.Qc2 Ng5 16.Ng5 fg5 17.e4+/-) 15.Qb3+- Ne4 16.0-0 Nf6 (16...f6 17.Be4 de4 18.Nd2+-) 17.Qb2 (17.Nc2 Qd8+-) 17...Bc8 (17...Qd8 18.Rfc1+-) 18.Rab1 (18.Nc2 b6+-) 18...Nfd7 (18...Qe7 19.Rfe1+/-) 19.Rfc1 (19.b6 Qe7+-) 19...f6 20.c6 (better 20.b6 Qe7 21.Nb5+-) 20...bc6? (better 20...Nb6+/-) 21.bc6+- Ne5 (21...Ba6 22.Nb5 Qe7 23.cd7 Nd7+-) 22.de5 fe5 (22...Nc6 23.ef6 Rf6 24.Bb5+-) 23.Ne5 (better 23.Qe5 Kg8 24.Rb8 Rb8 25.Qb8 Qe7+-) 23...Kg8 24.Nb5 (better 24.Ng4 e5 25.Ne5+-) 24...Ba6 (24...Qe7+-) 25.Nc7 Qe7 (25...Qc8 26.Na8 Bd3 27.Nb6+-) 26.Na8 Nc6 27.Nb6 (better 27.Nc6 Qg7 28.Ba6 Qb2 29.Rb2 Ra8+-) 27...Ne5 28.Qe5 (better 28.Ba6 Ng4 29.Rc8 Rc8 30.Bc8+-) 28...Rb8 (28...Bd3 29.Rc8 Rc8 30.Nc8 Qg7 31.Qe6 Qf7 32.Ne7 Kg7 33.Qe5 Qf6 34.Nf5 gf5 35.Qc7 Kg6+-) 29.Nd5 Rb1 30.Ne7 Kf7 (30...Kf8 31.Qh8 Ke7 32.Qh7 Kf6 33.Qg6 Ke7 34.Qg7 Kd8 35.Qc7 Ke8 36.Bg6 Kf8 37.Qf7) 31.Rb1 (31.Bb1 Bf1 32.Qf4 Ke8 33.Rc8 Ke7 34.Qf8 Kd7 35.Qd8) 31...Ke7 (31...Bb5 32.Rb5 Ke8 33.Rb8 Kf7 34.Ng8 a4 35.Qf6) 32.Rb6 (32.Qg7 Kd8 33.Ba6 a4 34.Rb8) 32...Kf7 33.Qe6 Kg7 34.Qf6 Kh6 35.Ra6 a4 36.Ra4 Kh5 37.Rh4 (37.Qh4) 1-0. geochess (2080) - mfc (2020), Rated Bullet game, lichess.org, 2013. (=1.Nf3 e6 2.b4 d5)

4.b5 c6 5.a4 Nf6 6.e3=.

4.b5 c6 5.e3 Bd6=.

4.b5 Bd6 5.d4 Nf6 6.c4 dc4 7.Qc2 Nbd7 8.Nbd2 c3 9.Qc3 0-0 10.e4+= Nb6 11.Rb1 Bd7 12.Ne5 Bc8 13.Be2 Nfd7 14.Nec4 Be7 15.0-0 f5 16.ef5 Nd5 17.Qc2 ef5 18.Re1 N7f6 19.Bd3 Nh5 20.Ne5+/– Nhf4 21.Bc4 Qd6 22.Ndf3 Ne6 23.a4 Kh8 24.Qb3 Nb6 25.Ng6! hg6 26.Be6 Qb4 27.Bf4 Qb3 28.Bb3 Bd6 29.Ne5 Rf6 30.Nf7 Kh7 31.Ng5 Kh6 32.Re5! Rf8 33.Bc4 Nd7? 34.Rb3+– Nf6 35.Rh3 Nh5 36.Ne6 (36.Ne6 g5 37.g4 fg4 38.Bg5 Kg6 39.Nf8 Bf8 40.Bd3 Kf7 41.Rh5+–) 1–0. Taulien,Hans_Juergen (2350) – Hohlstein,Walter (2080), RSX9E – A00 – Sokolsky–2, 2004.

4.b5 f5 5.d4= Nf6 6.c4 (6.Bf4 Bd6 7.e3 0-0+=) 6...Be7 (6...c5 7.Bg5=) 7.Bf4 Nh5 (7...0-0 8.e3=) 8.Be5+= 0-0 9.e3 Nf6 (9...Nd7 10.Bd3+=) 10.Qc2 (10.Bd3 Nbd7+=) 10...Nbd7= 11.Bg3 Ne4 12.cd5 Ng3 13.hg3 ed5 14.Bd3 g6 15.g4 Nb6 (< 15...fg4 16.Bg6 Ba3 17.Bh7 Kf7 18.Ne5 Ne5 19.Na3+/– (19.de5?! Bb4 20.Kd1 Ke7=)) 16.Nc3 (16.gf5 Bf5 17.Bf5 Rf5=) 16...Bd6= 17.a4 (17.gf5 Bf5 18.Bf5 Rf5=) 17...Qe7 (17...fg4!? 18.Ne5 Qf6–/+) 18.gf5= Bf5 19.Bf5. Winiger,Albert – Hohlstein,Walter, TT–07 TSC, 2003.

4.b5 Nf6 (--> 1.b4 e6 2.a3 Nf6 3.Nf3 a5 4.b5 d5).

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

4.c3 Nd7 5.e3 e5 6.Be2 (6.Bb2!?+=) 6...ab4–/+ 7.cb4 Bb4! 8.0-0 (8.ab4 Ra1 Pinning (8...Ra1 Deflection)) 8...Bd6 9.d3 Ngf6 10.Re1 0-0 11.Nc3 c6 12.e4 d4 13.Nb1 Qe7 14.Bg5 h6 (14...Ba3 15.Qb3 Nc5 16.Qc2=) 15.Bh4 Bc7 (15...Ba3?! 16.Qb3 Nc5 17.Qc2=) 16.Nbd2 Nc5 (16...Ra3 17.Ra3 Qa3 18.Bg3–+) 17.Nc4 b5 18.Ncd2 Na4 19.Qc2 Nc3 20.g3? (20.Nb1 Ba5 21.Rc1–+) 20...Ra3 (20...g5!? 21.Ng5 hg5 22.Bg5–+) 21.Ra3 Qa3 22.Kg2 (22.Bf6 gf6 23.Bd1 Be6–+) 22...Nh7 23.h3 (23.Nb1 Qc5 24.g4–+) 23...g5 (worse is 23...Ne2 24.Re2 g5 25.Qc6 Qd3 26.Re1–+) 24.Bg5 hg5 25.Nf1 b4 26.N1d2 Ba6 (better is 26...Qa2 27.Qa2 Na2–+) 27.g4 (27.Nb3 Qa4–+) 27...Bb5 (better is 27...Ne2 28.Re2 Bd3 29.Qc6 Be2 30.Qc7–+) 28.Kg3 (28.Nc4 Bc4 29.dc4 b3–+) 28...Ne2 (better is 28...Ba4 29.Nb3 Qb3 30.Qb3 Bb3 31.Nd2–+) 29.Kh2 (29.Re2 Bd3 30.Qd1 Be2 31.Qe2 Rb8–+) 29...Qc3 30.Qa2 Nf4 31.Kg3 Nd3 32.Rd1 Nc5 33.h4 (33.h4 gh4 34.Kg2 h3 35.Kg1–+). pieeater – ICCFmember, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.a3 a5)

4.Bb2 c5 5.bc5+= Bc5?? (better is 5...Nf6+=) 6.Bg7+– Qb6 7.e3 Ne7 8.Bh8 Bd7 9.Nc3 Nbc6 10.Ne5 (10.Na4 Qa5 11.Nc5 Qc5+–) 10...0-0-0 11.Bf6 Re8 (11...Ne5 12.Be5 f5 13.Qh5+–) 12.Na4 Qa5 13.Nc5 Qc5 14.Nc6 Bc6 15.Be7 (better is 15.Bd4!? Qa5+–) 15...Qe7 16.c4 Kb8 17.Be2 (17.cd5 Bd5 18.Qb1 Qh4+–) 17...d4 18.0-0 Qg5 (18...e5 19.ed4 ed4 20.Bf3+–) 19.Bf3 Bd7 (19...Qc5 20.Bc6 Qc6 21.Qh5 de3 22.fe3+–) 20.g3 (better is 20.Rb1 Bc8 21.Qa4 Re7+–) 20...e5 21.Rb1 e4 22.Bg2 d3 23.Qb3 Bc6 24.Qb6 Qe7 (24...Ka8 25.f3+–) 25.c5 (better is 25.Qc6! Ka7 26.Rb7 Qb7 27.Qe8 f5+–) 25...Qe6 (25...Ka8 26.f3 f5 27.fe4 fe4 28.Rf5+–) 26.Rb4 (26.Qa6 Kc8 27.Qb6 Qg4+–) 26...Qd5 (26...Bd5 27.f3 f5 28.Qe6 Re6 29.Bh3+–) 27.Qa6 Re6 (27...f5 28.Qb6+–) 28.Qc4 (better is 28.Qa5!? Kc8 29.Bh3 Qd8+–) 28...Qc4 29.Rc4 Bd5 (29...f5 30.f3+–) 30.Rb4 Rc6 31.Rc1 (better is 31.Be4 Be4 32.Re4 Rc5+–) 31...Kc7 (31...Re6 32.c6! Bc6 33.Rc6 Rc6 34.Be4+–) 32.Be4 Be4 33.Re4 Kd7 34.Rd4 Ke6 35.Rd3 b6 36.Rd6! Rd6 37.cd6 Kd6 38.d4 1–0. Fournier,Frederic (1980) – NN, jeu.europe–echecs.com, 2013. (=1.Nf3 d5 2.b4 e6)

4.Bb2 Nd7 5.Nc3 c5 6.e4 d4 (6...de4 7.Ne4 Ngf6 8.Nf6 Nf6 9.Ne5=) 7.Na4+= b5 8.Nc5 Bc5? (better is 8...Nc5 9.bc5 Bc5+=) 9.bc5+– Nc5? (9...Bb7 10.c6 Bc6 11.Nd4 Qf6+–) 10.Bd4 Ne4 (10...Nf6 11.Bc5 Ne4+–) 11.Bg7 Bb7 12.Bh8 Nh6 13.Bd3 Nc5 14.Bh7 Ng4 15.Bd4 Ne4 16.Be4 Be4 17.d3 Bb7 18.h3 e5 19.hg4 ed4 20.Rh8 (20.Rh8 Kd7 21.Rd8 Rd8 22.Kd2+–) 1–0. pierre – wohzen, Microsoft, 2012.

4.b5 a6 5.e3 Bd7 6.Nc3 Qb6 7.Na4 (better is 7.ba6!? Na6 8.Ne5=) 7...Qa5+= 8.c3 (8.Nc3!?+=) 8...Bb5–/+ 9.Qb3?? (better is 9.Bb5 ab5 10.Nb2–+) 9...Qa4 (9...Ba4?! 10.Qb7 Bc6 11.Qc8 Qd8 12.Qd8 Kd8 13.Ne5–+) 10.Rb1 Qb3 11.Rb3 c4 12.Rb2 (12.Rb1 Nd7–+) 12...Ba3 13.Rb1 Bc1 14.Rc1 a5 15.Rb1 Bc6 16.Ne5 a4 17.d3 cd3 18.Bd3 Ne7 19.0-0 0-0 20.Nc6 Nbc6 21.Rb7 a3 22.Bb5 (22.Ra1 Rfb8 23.Rb8 Nb8–+) 22...a2 23.Ra1 Ra3 (23...Rfb8 24.Rb8 Rb8 25.Ra2 Rb5 26.Kf1–+) 24.Bd3 (24.Kf1 Na5 25.Re7 Nb3 26.Ra2 Ra2–+) 24...Rb8 25.Rb5 (25.Rb8 Nb8 26.Bc2–+) 25...Rb5 26.Bb5 Rb3 27.Ra2 Rb5 28.Ra8 Rb8 29.Ra1 g6 0–1. Cycklone – Reine, playchess.de, 2002. (=1.Nf3 d5 2.b4 e6 3.a3 c5)

4.c3 Nc6 5.e3 Nf6 6.Be2 c4 7.0-0 e5 (7...Bd6 8.d3 cd3 9.Bd3+=) 8.Re1 (better is 8.b5!? Na5 9.Ne5=) 8...e4 9.Nd4 Qd7 10.a4 Nd4 11.ed4 Bd6 12.b5 Ng4 13.Bg4 Qg4 14.Qg4 Bg4 15.h3 Bd7 16.Re3 f5 17.Na3 f4 18.Re1 g5 19.f3 Bf5 (19...Ba3 20.Ba3 Bf5 21.fe4 de4 22.a5+=) 20.a5 (20.fe4 Be4 21.Nc4 dc4 22.Re4 Kd7=) 20...h5 (better is 20...Rc8–/+) 21.fe4+= de4 22.Kf2 (better is 22.Nc4!? 0-0-0 23.Ba3 Ba3 24.Ra3+=) 22...Ba3 23.Ra3 Rd8 24.Bb2? (24.Ra4 Rd5 25.Rc4 Rb5 26.Re4 Be4 27.Rc8 Kd7 28.Rh8 Ra5 29.Rh5 Ra1 30.Rg5 Rc1+=) 24...Rg8 (24...Rd5 25.b6 ab6 26.a6 ba6 27.Ra6–+) 25.Ba1 g4 26.hg4 hg4 27.Ra4 g3 28.Kg1 Rc8 29.Bb2 Rg7 30.Rf1 Rg4 31.b6 a6 32.d5?? (32.Bc1–+) 32...Kd7 33.Re1 (33.Rc4 Rc4 34.d6 Ra4–+) 33...Kd6 34.Ba3 Kd5 35.Bb4 Ke5 36.Be7 Rc6 37.Re2 Rg7 38.Re1 Re7 39.Kh1 Rd7 40.Rd1 Be6 41.Kg1–+ Rcd6 42.Ra2 e3 43.Kf1 ed2 44.Kg1–+Bg4 45.Rdd2 Rd2 46.Rd2 Rd2 47.Kf1 Rd1 0–1. pieeater – Papa Lazarou, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.a3 c5)

4.c3 Bd6 5.e3 Nf6 6.Be2 c4 7.0-0 e5 8.Re1 0-0 9.d3? (better is 9.h3–/+) 9...cd3–+ 10.Bf1 Qc7 11.e4 de4 12.Ng5 Bf5 13.Bd2? (13.f3 ef3 14.Qf3–+) 13...h6 14.Nh3 Nbd7 15.a4 Bg4 (15...Bh3 16.gh3 a5 17.f3 ab4 18.fe4–+) 16.Qc1 (16.f3 ef3 17.gf3 Be6–+) 16...Bh3 17.gh3 Ne8 (17...a5 18.Na3–+) 18.b5 (18.c4 Qc6–+) 18...f5 19.Be3 f4 20.Bd2 e3! 21.fe3 (21.Bd3 ed2 22.Nd2 Nef6–+) 21...f3 22.Kf2 (22.Kh1 e4 23.Bd3 ed3 24.Rf1–+) 22...e4 23.c4 (23.Bd3 Ba3 24.Rh1 Bc1 25.Be4–+) 23...Bh2 24.Nc3 Qg3 0–1. pieeater – David Lonsdale, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.a3 c5)

4.Nc3 cb4 5.ab4 Bb4 6.e3 Bc3 7.dc3 Nc6 8.Bd3 Nf6 9.Nd4 0-0 10.Nc6 bc6 11.Ba3 Re8 12.0-0 Qc7 13.c4 Bd7 14.Qf3 dc4 15.Bc4=+ Nd5 16.Rfd1= a5 17.e4 Nb6 18.Bd6 Qc8 19.Be2+= c5 20.Rab1 Na4 21.Bc4 Bc6 22.Be5 Rd8 23.Qg4+/– Rd1 24.Rd1 Qf8 25.Be6! fe6 26.Qe6+– Kh8 27.Qc6 Qe8 28.Qb7 (28...Ra7 29.Qa7 Qf8 30.Rd8 Qd8 31.Qg7#) 1–0. jaskier (2070) – guravaiahd, internet, 2007.

4.bc5 Bc5 5.d4 Bd6 6.e3 Nf6 7.Bd3 b6 8.Nbd2 Bb7 9.c4 0-0 10.Bb2 Nbd7 11.Qb1 Re8 12.0-0 Qe7 13.Ne5 Be5 14.de5 Ng4 15.Nf3 f5 16.ef6 Ngf6 17.cd5 ed5 18.Bd4 Ne4 19.Ra2 Rac8 20.a4 Rf8 21.Rc1 Rc1 22.Qc1 Rc8 23.Rc2 Nec5 24.Qa3 Qd8 25.Bf5 Ne4 (25...Qf8 26.Bh3+/–) 26.Rc8 Bc8 27.Be6 Kh8 28.Bd5 Ndc5 29.Be4 Ne4 30.h3 h6 31.Qa2 Nd6 32.Qd5 Bb7 33.Qe6 Kh7 34.Qg4 Qe7 35.Ne5 Be4 36.f3 Bf5 37.Qg3 g5? (better is 37...Bc2!?+/–) 38.Nc6+– Qe6 39.Na7 Bc2 40.Nb5 (worse is 40.Bb6 Ba4 41.Bc5 Nc4+–) 40...Nb5 41.ab5 (41.ab5 Qd7 42.Qe5+– (worse is 42.Bb6 Bd3+–)) 1–0. Vidoniak,Roman (2450) – Strohhaeker,Raoul (2150), Neuhausen op, 2004. (=1.Nf3 d5 2.b4 e6 3.a3 c5)

4.bc5 Bc5 5.e3 Nf6 6.Be2 0-0 7.0-0 Nc6 8.Nc3 a6 9.d4 Bd6 10.a4 Qc7 (10...Qe7 11.Rb1+=) 11.Ba3= Nb4 12.Rb1 a5?? (better is 12...Qc3 13.Rb3 Qc7 14.Bb4 Bb4 15.Rb4 Bd7=) 13.Nb5+– Qe7 14.Nd6 Qd6 15.c3 1–0. pierre – dufva, Microsoft, 2012.

4.bc5 Bc5 5.e3 Nf6 6.Be2 0-0 7.0-0 Nc6 8.d4 Bd6 9.Nbd2 b6 10.Bb2 Bb7 11.c4 Rc8 12.Rc1 Qe7 13.Qa4 dc4 14.Nc4 Bb8 15.Nce5 Ne5 16.Ne5 Rfd8 17.Bd3 h6 18.h3 Nd5 19.Rc8 Rc8 20.Qb3 Nf6 21.Qb5 Qd6 22.Rc1 Rc1 23.Bc1 a6 24.Qb3 Nd5 25.Bd2 b5 26.a4+= b4 27.e4 Nf6 28.Bb4 Qd4 29.Bc3 Qa7 30.Qb4 Ba8 31.Qc4+= Qc7 32.Qc7 Bc7 33.f3 Bb7 34.Kf2 Kf8 35.Ke3 Ke7 36.Nc4 g5 37.Bb4 Kd7 38.Kd4 Bg3 39.Bf8 h5 40.Bb4 Bf2 41.Kc3 Bg3 42.Bc5 Bf4 43.Kd4 Bg3 44.Ba3 Bf2 45.Kc3 Be1 46.Kc2 Bg3 47.Bc1 g4 48.hg4 hg4 49.Bb2 gf3 50.gf3 Nh5 51.Ne5 Ke8 52.Bc4 Nf4 53.Kd2 Ke7 54.Ba3 ½–½. Rosner,Dirk – Ehrlich,Stefan, DESC, 2000.

4.Nc3 Nf6 5.Bb2 Be7 6.b5 Na5 7.e3 Nc4 8.Bc4+= dc4 9.Qe2 a6 10.Qc4 Bd7 11.0-0 ab5 12.Nb5 Ra5 13.Nc7 Kf8 14.Bd4 Qc7?? (better is 14...b5 15.Qc3 Ra3 16.Ra3 b4+–) 15.Qc7+– Bb5 16.Bc5 Bf1 17.Qe7 Kg8 18.Qf8 1–0. Anonymous – Anonymous, sv.lichess.org, 2011.

4.e3 Bd7 5.b5 Nce7 6.a4 Nf6 7.Ne5 Bc8 8.f3 Ng6 9.f4 Be7 10.d4 c5 (10...Ne4 11.Qf3+=) 11.g3 (11.bc6!? Rb8 12.cb7 Rb7 13.Bb5 Bd7 14.Nd7 Nd7 15.0-0+/–) 11...b6 12.Bd3 Ne5 13.fe5 Ne4 14.Qg4 g6 (14...Ng5!?=) 15.Be4+= de4 16.Qe4 Bd7 17.d5 ed5 18.Qd5 c4 (18...0-0 19.Nc3=) 19.Qc4 Rc8 20.Qd3 0-0 (20...Qc7 21.e4=) 21.0-0 Bc5 22.Nc3 Bf5 23.Qe2 (23.Rf5 gf5 24.Nd5 Qg5+/–) 23...Qg5 24.Rf2 Bg4 25.Qd2 (25.Qc4 Qe5 26.Qg4 Qc3=) 25...Rcd8 26.Qe1 Bf5?? (26...Qe5 27.a5 Bb4–/+) 27.Kg2?? (27.e4 Bf2 28.Qf2 Qe7 29.ef5 Qe5+–) 27...Bb4?? (27...Qe7 28.e4 Bf2 29.Kf2=) 28.Ba3 Bc3 29.Qc3 Rc8 30.Qd4 Rfd8 31.Qb2 Qe3= 32.Be7?? Be4 33.Kf1 Re8 34.Bd6 Bd5 35.Re1?? Bc4–+ 36.Kg1?? Qe1 37.Kg2 Qe4 38.Kh3 Be6 39.g4 Qg4 0–1. Pekin Dragons – Papa Lazarou, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6)

4.c4 dc4 5.e3 a5 6.b5 Nd7 7.Bc4 Nb6 8.Be2 Ne7 9.Bb2 f6 10.Nc3 a4 (10...0-0 11.0-0+=) 11.Ne4 Nf5 (11...0-0!?+=) 12.g4+– Ne7 13.g5 Ned5 14.Rg1 e5 (14...Qe7 15.gf6 gf6 16.Nh4+–) 15.gf6+– gf6 (15...Nf6 16.Nd6 cd6 17.Rg7+–) 16.d4 Bf5 17.Qc2 Bg6 18.Nh4 Qe7 19.Rg6 hg6 20.Ng6 Qg7 21.Nh8 Qh8 22.0-0-0 Qh2 23.Nd6 cd6 24.Qg6 Kd8 25.de5 Rc8?? (25...Qf2 26.ed6 Qe3 (26...Qe2?? 27.Bf6 Nf6 28.Qf6 Kc8 29.Qf8 Kd7 30.Qe7 Kc8 31.Qc7) 27.Rd2 f5+–) 26.Kb1 Qf2 (26...Kc7 27.Bg4 Rd8 28.ed6 Qd6+–) 27.ed6 Rc5 (27...Rc3 28.Qg8 Kd7 29.Bg4 f5 30.Qf7 Kd6 31.Bc3 Kc5 32.Bd4 Kb5 33.Bf5 Qf3 34.Bd3 Kc6 35.Rc1 Nc3 36.Rc3 Nc4 37.Qe6 Kc7 38.Bb6 Kb8 39.Qe8) 28.Qg8 Kd7 29.Bg4 f5 30.Qg7 Ke6 (30...Kd6 31.Qe5 Kd7 32.Bf5 Qf5 33.Qf5 Ke7 34.Qh7 Ke8 35.Qg6 Kd7 36.Qb6 Ke7 37.Qc5 Kf7 38.Qd5 Ke7 39.Bg7 b6 40.Qd7) 31.Qe5 Kd7 32.Bf5 Qf5 33.Qf5 Ke8 (33...Kd6 34.Qf8 Ke6 35.Qc5 Kf5 36.e4 Kg4 37.Qg1 Kf3 38.Rd3 Ke4 39.Qg6 Kf4 40.Rg3 Nf6 41.Bf6 Nc4 42.Qg4) 34.Bf6 (34.Qe6 Kd8 35.Rh1 Rc1 36.Kc1 Nd7 37.Rh8 Nf8 38.Rf8) 34...Nc3+– 35.Bc3 Rf5. Silent Move (2115) – alazar (1720), redhotpawn.com, 2016.

4.e3 Nh6 5.Bb2 f6 (5...0-0 6.Nc3 a5 7.Nb5 Be7 8.Be5 Na6 9.ba5 f6 10.Bb2 e5+= –0.53) 6.Bd3 (6.c4 0-0 7.c5 Be7 8.d4 a5 9.Bd3 ab4 10.ab4 Ra1+= 0.44) 6...Bd7 (6...0-0 7.Nc3 Nd7 8.0-0 a5 9.b5 Ng4 10.Be2 Nde5= 0.06) 7.0-0 (7.Nc3 0-0 8.0-0 c6 9.e4 b5 10.Qe2 a5= 0.00) 7...e5 (7...a5 8.b5 e5 9.Be2 0-0 10.Nc3 Be6= –0.19) 8.Ne5?? (better is 8.e4= a5 9.ba5 c6 10.c4 d4= –0.03) 8...Be5–+ 9.Qh5 Ke7?? 10.Be5+= Ng4? 11.Bd4+– Qe8 12.Qd5 Bc6 13.Bc5 1–0. lupo_alberto – Patrick F, ChessWorld.net, 2011.

4.e3 b5 5.Bb2 a5 6.Ne5 ab4 7.ab4 Ra1 8.Ba1 Nf6 9.Nd7 Qd7 10.Bf6 gf6 11.c3 Be7 12.d4 e5 13.Qh5 ed4 14.ed4+/– Qe6 15.Kd1+– c6 16.Bd3 Qd6 17.Re1 Qf4 18.Na3 Qf2? 19.Nb5! cb5 20.Bb5 Nd7 21.Qg4 f5 22.Qg7 Rf8 23.Qe5 (23.Qe5 Qe1 24.Ke1+–) 1–0. themonkey (2120) – NN, GameColony.com, 2002.

4.e3 c5 5.b5 b6 6.a4 a6 7.Be2? (better is 7.ba6 Bd6 8.Nc3=) 7...ab5–+ 8.0-0 ba4 9.d3 b5 10.Re1 Nf6 11.Ne5 Nc6 (11...Bd6 12.Nd7 Nbd7 13.c4 bc4 14.dc4–+) 12.Nc6 (better is 12.Nd7 Qd7 13.c4 bc4 14.dc4–+) 12...Bc6 13.Bf3 Be7 14.Bd2 0-0 15.Nc3 a3 16.e4 de4 17.Ne4 Ne4 18.de4 b4 19.Re2 Bb5 20.Re1 Qc7 21.Re3 (21.e5 Ra5–+) 21...Bf6 22.e5 Be5 23.Rb1 (23.Ba8 Ra8 (23...Bh2?! 24.Kh1–+) 24.c3 Bh2 25.Kh1 Bf4 26.cb4 Be3 27.fe3 Qe5–+) 23...Bh2 24.Kh1 Ra7 (better is 24...Bf4 25.Ba8 Be3 26.Be3 Ra8 27.Qh5–+) 25.Re4 (25.g3 Bg3! 26.fg3 Qg3 27.Be1 Qh3 28.Kg1–+) 25...Be5 26.Bc1 (26.Qe1 a2 27.Ra1 Ba1 28.Qa1 Bc6–+) 26...Bc6 (26...a2 27.Ra1 Ba1 28.Bf4 Qf4 29.Rf4–+) 27.Re3 (27.Re5 Qe5 28.Bc6–+) 27...a2 28.Bc6 (28.Reb3 Rd8 29.Qe1 Bf3 30.gf3–+) 28...ab1Q 29.Be4 Ra1 30.g3 Qc1 31.Qc1 Rc1 (31...Rc1 32.Kg2 f5–+) 0–1. pieeater – Mr.Oldenslo, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.a3 Bd7)

4.e3 Bd6 5.Bb2 Nf6 6.c4 dc4 7.Bc4 0-0 8.0-0 b5 9.Bd3 a6 10.Qc2 g6 11.Ne5 Be5 12.Be5 Nd5 13.e4 f6 (13...Nc6!? 14.f4 Ne5 15.fe5 Nb6+=) 14.Bg3+/– Ne7 15.Bc7 Qe8 16.Bd6 Nbc6 17.Re1 Rc8 18.Bc5 Qf7 19.Qb3 Na5 20.Qa2 Nb7 21.Bd4 Nc6 22.Be3 Ne5 23.Be2 Nc4 24.Bh6 Rfd8 25.a4! g5 26.f4 Qg6= 27.d3 Qh6 28.dc4+= gf4 29.cb5 ab5 30.Bb5+– Qg7 31.Bd7 Qd7 32.b5 Qd4 33.Kf1 Kf7 34.a5 Qd3?? 35.Qe2+– Qe2 36.Ke2 Rc2 37.Kf3?? Rd3–+ 38.Kf4 Rf2 39.Kg4 Rg2 40.Kf4 Rf2 41.Kg4 h5! 42.Kh5 Rg2 43.h4 Rd8 (43...Rd8 44.Rd1 Rh8) 0–1. Shields,B – Johnson,Ben, Plymouth ch–MI op, 1984.

4.e3 Nf6 =.

4.Ne5 c6 5.e3 Be7 6.Bb2 Bf6 7.Bd3 Be5 8.Be5 Nf6 9.0-0 b5 10.Nc3 0-0 11.Qf3 a5 12.Bd6 Re8+= 13.Ne2 a4 14.Nd4?? Na6?? 15.Qg3?? Ne4?? 16.Be4+= de4 17.f3 Bc8? 18.Nc6 Qf6? 19.fe4 Qb2 20.Be5 Qc2 21.Qg7# 1–0. coolerdude – Tricky Rabbitt, ChessWorld.net, 2005.

4.Ne5 Bd6 5.d4 =.

4.Bb2 Bf6 5.d4 Ne7 6.e3 b6 7.Nbd2 a5 8.c4 ab4 9.ab4 Ra1 10.Ba1 c6 11.Bd3 Ba6 12.Qc2 Ng6 13.b5 cb5 14.cb5 Bb7 15.0-0 0-0 16.Ne5 Ne5 (16...Qd6!?+=) 17.Bh7 Kh8 18.de5 Be7 19.Nf3 g6 20.Bg6 fg6 21.Qg6 Rf5?? (better is 21...Bc8+=) 22.Qh6 Kg8 23.Qe6?? Rf7+/– 24.Qg6 Rg7 25.Qe6 Rf7 26.Qg6 Rg7 27.Qe6 Rf7= ½–½. atanas70 (1635) – zar111 (1730), kurnik, 2012.

4.Bb2 Bf6 5.Bf6 Nf6 6.e3 0-0 7.Bd3 Nbd7 8.0-0 e5 9.Ne1 c5 10.Bf5 c4 11.d3 b5 12.Nc3 Nb6 13.Bc8 Qc8 14.Nb5 Qc6 15.Nc3 a5 16.b5 Qc7 17.Qd2 Nfd7 18.Nf3 Rfd8 19.d4 e4 20.Ng5 Nf6 21.a4 h6 ½–½. Nylson – Nikolic_Jovane, playchess.de, 2002.

4.e3 Nf6 5.d4 a5 6.b5 0-0 7.c4 c5 8.dc5 dc4 9.Qc2 Nbd7 10.Bc4 Bc5 11.0-0 b6 12.Rd1 Qc7 13.Bb2 1–0. David Lonsdale – ICCFmember, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.a3 Be7)

4.g3 Nf6 5.Bg2 0-0 6.0-0 b6 7.Nc3 c6 8.d3 Bb7 9.Bf4= Nbd7 10.Rb1 Rc8 11.d4 Ba6 12.a4 c5 13.bc5 bc5=+ 14.Nb5 Qa5?? 15.Na7+/– Be2 16.Nc8 Rc8?? 17.Qe2 Qa4 18.Ra1 Qc6 19.Rfb1 h6 20.Ra6 (20...Nb6 21.Rab6+–) 1–0. gtate (2150) – dnptrs (2305), net–chess.com, 2006.

4.c4 Nf6 =.

4.d4 Nf6 5.Nc3 Bd6 6.g3 c6 (6...0-0 7.Bg2=) 7.Bg2 0-0 (7...Nbd7 8.Bf4 Bf4 9.gf4=) 8.0-0 (8.Qd3 Nbd7=) 8...Nbd7 9.Qd3 (9.Bg5 Qc7=) 9...Ne4 10.Be3 (10.Bb2 Nb6=) 10...Rf6 11.Ng5 Rg6 12.Nf3= Qc7 13.Nh4 Rf6 14.Nf3 Nf8 15.h4 Bd7 16.h5 Be8 17.h6 g6 18.Ng5 Rd8 19.Nce4+/– fe4 20.Qd2 Be7 21.c4+– Qd7 22.c5 Rf5 23.g4 Rf6 24.Bf4 Qc8 25.Be5 Nd7 26.Bf6 Nf6 27.f3 ef3 28.ef3 Bd7 29.Rfe1 Rf8 30.a4 Kh8 31.Qe3 Ng8 32.Ne6 Be6 33.Qe6 Qe6 34.Re6 Bf6 35.Rd1 Bg5 36.b5 1–0. wiking – talqx, internet, 2010.

4.e3 Nf6 5.c4 (5.d4 Be7=) 5...c6 (5...Be7 6.d4=) 6.Nc3 (6.d4 Nbd7+=) 6...Bd6 (6...Be7 7.d4=) 7.Bb2 (7.c5 Bc7=) 7...0-0 (7...dc4 8.Bc4 b5 9.Bb3=) 8.d4 Ne4 (8...dc4 9.Bc4 b5 10.Bb3=) 9.Bd3 Qf6 10.0-0 Nd7 11.Be2 Qh6 12.g3 (12.c5 Bc7=) 12...g5 (12...Qf6 13.Qd3=) 13.Qc2 (13.Ne4 fe4 14.Nd2 Nf6+=) 13...Ndf6 (13...g4 14.Ne4 fe4 15.Nh4=) 14.Ne5 (14.c5 Bc7+=) 14...g4 (14...Nc3 15.Bc3 Be5 16.de5=) 15.Ne4+= Ne4 16.a4 White prepares c5 (16.Rfd1!?+=) 16...Bb4= 17.Ba3 a5 (17...Bd6 18.Bd6 Nd6 19.Ra3=) 18.Bb4 ab4 19.c5 Rf6 (19...b3 20.Qb2+= (worse is 20.Qb3 Nd2 21.Qb4 Nf1 22.Bf1 Qg5+=)) 20.Rfb1 Qh3 21.Bf1 (21.Rb4?? Rh6 22.Bd3 Qh2 23.Kf1 Qh1 24.Ke2 Qa1 25.Be4 de4–+) 21...Qh5 22.a5 (22.Rb4 Rh6 23.h4 gh3+=) 22...Rh6= 23.h4 gh3 24.Kh2 Qe8 25.Rb4 Ra7 (25...Nf6 26.Be2+= (26.Bh3?? Qh5 27.Kg2 Qh3 28.Kf3 Qh5 29.Kg2 Ng4–+)) 26.a6 (26.Rb6 Nf6 27.Be2 Nd7 28.Nd7 Bd7+/–) 26...ba6 27.Rb8 (27.Bh3?? Qh5 28.Kg2 Qh3 29.Kf3 Qh5 30.g4 fg4 31.Ke2 g3 32.f3 a5–+) 1–0. Cirulis,Ilmars (1650) – Voudouris,Nick (1745), FICGS, 2014.

4.c3 Bd7 5.h4 Bd6 6.Nd4 c5 7.Nb3 Ba4 8.e3?? (better is 8.bc5 Bc5 9.d4+=) 8...c4–+ 9.Qg4 Nh6 (9...Bb3 10.d4 cd3 11.Bd3–+) 10.Qf3 (10.Qg5 Bb3 11.Qf6 gf6–+) 10...Qf3 (10...cb3?! 11.Qf6 gf6 12.Bb2–+; 10...Bb3?! 11.Qf6 gf6 12.d3–+) 11.gf3 Bb3 12.Rg1 Bc2 13.e4 0-0 (13...Kf8 14.Be2–+) 14.a4 (14.d4 Kh8 15.a4 Nc6–+) 14...Re8 (14...Bh2 15.Rg2 Bf4 16.Na3 Ba4 17.Nc4 dc4 18.Ra4–+) 15.Na3 Ba4 (better is 15...Bd3–+) 16.Nb5 (16.Nc4 dc4 17.Ra4–+) 16...Bb5 17.Ra5 a6 18.Bh3 (18.d4 Kf8 19.e5 Bb4 20.cb4 Nf5–+) 18...Nc6 19.Ra3 Ne5 20.d4 (20.Bg2 Nd3 21.Ke2 Bc6–+) 20...cd3 (20...Nf3 21.Kf1 Ng1 22.Kg1 de4 23.Bh6 gh6 24.Bg2–+) 21.Rg3 (21.Bg2 d4! 22.Bh1 dc3 23.Bh6 Bb4–+) 21...Nc4 22.Ra2 Bg3 23.fg3 Rad8 24.Bf4 de4 25.fe4 f5 26.Bg5 d2! 27.Kd1 Ba4! 28.Ke2 d1Q 29.Kf2 Rd3 30.Bf1 Ng4 31.Kg1 Rg3 32.Rg2 Nce3 33.Bf4 Qf1 0–1. Pepper,Bonnie – Champion,Christopher, IECG, 1999. (=1.Nf3 d5 2.b4 e6)

4.Nc3 a5 5.Bb2 Qd8 6.ba5 Nf6 7.e3 Ra5 8.Bd3 Nbd7 9.Ne2 Bd6 =+.

4.Nc3 Bd6 5.d4= a5 (5...Qf5 6.Nb5 Nf6 7.e3 0-0 8.Bd3 Qh5 9.0-0 e5=) 6.ba5 Qf5 7.g4 Qg6 8.Nb5 Nc6 9.Rg1 Na5 =.

4.Nc3 Nh6 5.d4+= (5.Nb5 Qd8 (5...Qe7) 6.d4 a6 7.Nc3 Ng4 8.e4 de4 9.Ne4 a5+=) 5...b5? (5...Bd7!?+= 6.e4 de4 7.Ne4 Qg6 8.Neg5 Bd6 9.Bd3 Qh5+/–; 5...a5 6.b5 Qf5 7.e4 de4 8.Ne5 Nd7 9.g4 Ng4+/–) 6.e4 e5?? 7.Nd5+– Qc6 8.Bb5! Qb5 9.Nc7 Kd7 10.Nb5 Ba6 11.Ne5 Ke6 12.Nc7 Kf6 13.Bg5! (13.Bg5 Kg5 14.Nd5 Bb4 15.ab4 Kh4 16.g3 Kh3 17.Nf4#) 1–0. pierre – engipe, internet, 2010.

4.d4 A) 4...Bd6 5.Nc3 a5 (5...Qf5 6.g4 Qg6 7.Nb5 Nd7 8.Nd6 cd6 9.Rg1 a5+=) 6.b5 Qg6 7.b6 Nd7 8.bc7 Bc7 9.a4 Ra6=; B) 4...a5 5.b5 Qf5 (5...Bd6 6.Nc3 Qg6 7.b6 c6 8.e4 Nd7 9.e5 Be7+/–; 5...Nd7 6.Bg5 Qg6 7.e3 Ngf6 8.Bf4 Bd6 9.Nh4 Qg4=) 6.b6 c6 7.e3 Nf6 8.Ne5 Nfd7 9.Bb2 f6 =.

(--> 1.b4 e6 2.a3 Nf6 3.Nf3 d5).

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

4.Bb2 c5 5.b5 a6 6.e3 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 a6 6.Nf3)

4.Bb2 Bd6 5.e3 a5 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5 Bd6 6.e3).

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

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

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

(--> 1.b4 d5 2.Bb2 e6 3.Nf3).

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

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

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

3.Bb2 Nc6 4.a3 Nf6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 Nc6 5.Nf3).

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

4.a3 c5 5.bc5 Bc5 6.Nc3 Nc6 7.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.Nc3).

4.a3 c5 5.bc5 Bc5 6.d4 Bd6=+ 7.e3 Nc6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.d4 Bd6).

4.a3 c5 5.bc5 Bc5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3).

4.a3 c5 5.bc5 Bc5 6.e3 a6 7.Be2 Nc6 8.0-0 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3 Nc6 7.Be2 0-0 8.0-0 a6).

4.a3 Bd6 5.e3 a5 6.b5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 a5 5.b5 Bd6 6.e3).

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

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

4.a3 Be7 5.e3 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Nbd7 5.e3 Be7).

4.b5 c5 5.e3 Bd6 6.c4 Nbd7 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7).

4.b5 Bd6 5.e3 c5 6.c4 (--> 1.b4 d5 2.Bb2 Nf5 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4).

4.b5 Bd6 5.e3 c5 6.c4 b6 7.Be2 Bb7 (--> 1.b4 e6 2.Bb2 Nf6 3.b5 b6 4.e3 Bb7 5.Nf3 c5 6.c4 d5 7.Be2 Bd6).

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

4.c4 dc4–/+ 5.Qa4 Qd5 (better is 5...c6!? 6.Qc4 ab5–/+) 6.Nc3= Qh5 7.Qc4 ab5 (7...c6 8.bc6 b5 9.Qf4 Nc6 10.d4=) 8.Qc7 Nc6 9.Qb6 (9.a4 b4 10.Nb5 Nf6+=) 9...Bc5 (9...b4 10.Nb5 Bc5 11.g4 Bb6 12.gh5=) 10.Qc7 (10.Qb5 Ra5 11.Qc4 b5+=) 10...Nge7 11.Qf4 (11.Bb2 0-0 12.e3 Rd8=) 11...Ng6 (11...e5 12.Qe4 Bf5 13.Qh4 Qh4 14.Nh4–/+) 12.Qe4 (12.Qc7 0-0=) 12...f5 (12...b4!? 13.g4 Bf2 14.Kf2 Qc5 15.Qe3 Qe3 16.Ke3 bc3 17.dc3 e5–/+) 13.Qb1 0-0 14.Nb5 Nf4 (14...Nh4 15.Nh4 Qh4 16.e3+=) 15.d4+/– Bb6?? (better is 15...Bb4 16.Bd2 Bd2 17.Nd2 Nd5+/–) 16.Bf4+– Ba5 17.Bd2 Bb6 (17...Bd2 18.Nd2 f4 19.Nf3+–) 18.Nd6 (18.e3!? Rd8+–) 18...Bd4 (18...Nd4 19.Qb6 (19.Nc8?! Rfc8 20.Qb6 Nc2 21.Kd1 Na1+–) 19...Nc2 20.Kd1 Na1 21.Qb2+–) 19.Nd4 Nd4 20.e3 (20.Nb7?! Bb7 21.Qb7 Nc2 22.Kd1 Na1=; 20.Nc8?! Rfc8 21.Kd1 Qe8+–) 20...Nc6 21.Be2 Qg6 22.Nb7 Qg2 23.Rf1 Qh2?? 24.Nc5+– e5 25.Bc4 Kh8 26.Ne6 Be6 27.Be6 Rab8? 28.Qc2 Nb4 29.Bb4 Rb4 30.Bf5 Qh5 31.Rc1 Rbb8 32.Be4 Rbd8 33.Rh1 Qg4 34.Bh7 Qb4 35.Kf1 Qb5 36.Bd3 Kg8 37.Bb5 Rc8 38.Qb3 (38.Qb3 Rc4 39.Bc4 Rf7 40.Qb8) 1–0. Sundfar – Bogocebu, playchess.de, 2005.

4.e3 ab5 5.Bb5 c6 6.Be2 Nd7 7.c4 Ngf6 8.Bb2 Bd6 9.Nc3 0-0 10.Qc2 Qa5 11.0-0 Re8 12.Rfe1 dc4 13.Ne4 Bf8 14.Qc4 Qa4 15.Nf6 Nf6 16.Qc3 Nd5 17.Qe5 Qc2 18.Rac1 Qg6 19.Bc4 f6 20.Qg3 Qg3 21.hg3 b5 22.Bb3 c5 23.Bd5 ed5 24.Ra1 Ra4 25.d4 c4 26.Re2 b4 27.a3 c3 28.Bc1 b3 (29.Rb1 Ba6–+ (29...Ba3?! 30.Rb3 Bc1 31.Rc3–+); 28...ba3?! 29.Rc2–+) 0–1. Pinto Fernandez,Silvio – Gallardo Garcia,Andres (2290), Alameda de Osuna op, 2000.

4.bc6 Nc6 5.e3 Bb4 6.Be2 Nf6 7.0-0 0-0 8.Bb2 Ne4 9.c4 Bd6 10.d3 Nc5 11.d4 Ne4 12.cd5 ed5 13.Nbd2 Bg4 14.h3 Bh5 15.Ne4 de4 16.Nd2 Be2 17.Qe2 Qh4 18.Qg4 Qg4 19.hg4 Rfe8 20.Rfc1 Rad8 21.a4 Nb4 22.Ba3 Nd3 23.Rcb1 b6 24.Bd6 Rd6 25.a5 h6 26.ab6 ab6 27.Ra3 Rc6 (27...g6 28.Rc3+/-) 28.Ne4 Re4 29.Rd3 Rg4 30.Rdb3 Rgg6 31.d5 Rcd6 32.e4 f5 33.ef5 Rgf6 34.g4 h5 35.f3 h4 (35...hg4!? 36.fg4 g6=) 36.Rb5 Kf8 37.Kg2 Ke7 38.Kh3 Rh6 39.g5 (39.g5 Rh5 40.Re1 Kd7 41.f4+-) 1-0. MFdanielrangel (2320) - blitzg3niuz (2305), Rated Blitz game, lichess.org, 2016. (=1.Nf3 A00: Irregular Openings 1...d5 2.b4 e6)

4.e3 Nf6 5.Be2N Be7 6.0-0 0-0 7.c4 a6 8.Bb2 dc4 9.Nc3 ab5 10.Nb5 Nc6 11.Bc4 b6 12.d4 Ba6 13.dc5 bc5 14.Qe2 Na5 15.Bd3 c4 (15...Qc8 16.Bf6 Bf6 17.Rab1=) 16.Bc4+= Nc4 17.Qc4 Qb6 18.a4 Nd5 (18...Rfc8 19.Bd4 Qa5 20.Qd3+=) 19.Bd4 (19.Qd4 Qd4 20.Bd4 Rfb8+/-) 19...Qb7 20.Qd3 (20.Rfb1 Rfc8 21.Qe2 Nb4+/-) 20...h6 (20...Nb4 21.Qe2+=) 21.Rac1 (21.Qe4 Bb5 22.Rfb1 Ra5+=) 21...Rac8 22.Rfd1 Nc7 (22...Nb4 23.Qe2+/-) 23.Rb1 Bb5 24.ab5 Nd5 (24...Rfd8 25.Qe2+/-) 25.Rbc1 (25.Ne5 Nb4 26.Qe2 Rc2+-) 25...Bf6 26.Ne5 Rfd8 (26...Rc1 27.Rc1 Ra8 28.Qc4+/-) 27.Nc6+- Re8 28.Ne5 (28.Rb1 Bd4 29.Qd4 Ra8+-) 28...Be5 (better 28...Red8=) 29.Be5+/- f6 30.Rc8 Rc8 31.Bd4 Kh8 (31...e5 32.Ba1+/-) 32.Qb3 (better 32.h3!?+/-) 32...e5+= 33.Ba1 Nb6 (better 33...Nc7!?=) 34.Bb2 Nc4 35.Bc3 (35.Rc1 Qc7+/-) 35...Nb6 36.Rd3 (36.Ba5 Nc4 37.Bd8 Rc5+/-) 36...Qa7 (36...Nd7!? 37.Qd1 Qb5 38.Rd7 Rc3+=) 37.Rd6 Qc7 (37...Qb8 38.Rc6+/-) 38.Rc6+- Qd8 39.Qb4?? (39.h3!? Ra8+-) 39...Qd1?? (better 39...Nd5 40.Qb3 Nc3-/+) 40.Be1+/- Kh7 (40...Rb8 41.e4+=) 41.Rd6 (better 41.Rb6!? Rc1 42.h4 Qe1 43.Qe1 Re1 44.Kh2+-) 41...Nd5+/- 42.Qe4 (better 42.h3 Rb8 43.Qa5+/-) 42...Kh8=+ 43.Qb4 Rc1 (better 43...f5 44.f4 Rc1 45.Rd5 Qd5-+) 44.Rd8-+ Kh7 45.Qe4 g6 46.Rd7 Kh8 47.Rd8 (47.h3 Qe1 48.Kh2 Qf2 49.Rd8 Kg7 50.Rd7 (worse 50.Rd5 h5 51.h4 Kh6-/+) 50...Kf8 51.Rd5 (worse 51.Qd5 Qg1 52.Kg3 Qe3 53.Qf3 Qf3 54.Kf3 Rb1-/+) 51...Qg1 52.Kg3 Qe1 53.Kf3=) 47...Kg7=+ 48.g3?? (better 48.h3 Qe1 49.Kh2=+) 48...Qe1 49.Kg2 Qf1 (49...Qf1 50.Kf3 Qh1 51.Kg4 Qe4 52.Kh3 Qf5 53.g4 Qf3 54.Kh4 g5 55.Kh5 Qh3) 0-1. berty2 (2240) - kianas (1950), ChessWorld.net, 2010.

4.Bb2 cb5 5.Nc3 (5.e3 b4+=) 5...Bd7 6.e3 a6 7.a4 f6 (better is 7...ba4!? 8.Na4 Nf6–/+) 8.ab5+= Qb6 9.Bd3 Bb5?? (better is 9...Ne7+=) 10.Bb5+– (10.Bb5 Nc6 11.Nd4+–) 1–0. Anonymous – Anonymous, sv.lichess.org, 2011.

4.e3 Nf6 5.Bb2 Bd6 6.Be2 (6.a4 0-0=) 6...0-0 7.0-0 cb5 8.Bb5 a6 9.Ba4 (9.Be2 Nc6+=) 9...Nbd7 (9...b5 10.Bb3+=) 10.d4 (10.Bd7 Nd7 11.Ba3 Ba3 12.Na3 e5+=) 10...b5 11.Bb3 a5 12.a3 (12.a4 Ba6 13.ab5 Bb5–/+) 12...Ba6 13.Nbd2 a4 14.Ba2 b4 15.ab4? (15.Re1!?–/+) 15...Bf1–+ 16.Qf1 Bb4 17.c4 Ne4 (17...Qe7 18.cd5 Rfb8 19.Qd3–+) 18.Ne4 (18.Qd3 Nd2 19.Nd2 dc4 20.Nc4 Qg5–+) 18...de4 19.Ne1 Qa5 (19...Qc7–+) 20.f3 (better is 20.Nc2–+) 20...a3 21.Bb3 (21.Bb1 Be1 22.Be4–+) 21...ab2 22.Ra5 b1Q (22...Ba5?! 23.Bc2 Rfc8 24.Kf2 Be1 25.Qe1 Rc4 26.Qe2–+) 23.Ra8 Ra8 (23...Ra8 24.Bc2 Qc1–+; 23...Qe1?! 24.Qe1 Be1 25.Ra7–/+) 0–1. Gegonz – menangan (1865), internet, 2007.

4.e3 Nf6 5.Be2 Bd6 6.a4 0-0 7.Ba3 cb5 (7...c5 8.d4 Nbd7 9.0-0=) 8.ab5 Ba3 9.Na3 Nbd7 10.0-0 b6 11.c4 dc4 12.Nc4 Bb7 13.Qb3 Nc5 14.Qb2 Qd5 (14...Bd5 15.d4 Nce4 16.Nfe5+–) 15.Ra3 Nfd7 (15...Rfc8!?+–) 16.d4 Ne4 17.Rfa1 Nd6 (17...Rfc8 18.Ra7 Ra7 19.Ra7+–) 18.Nd6 (18.Ra7?! Nc4 19.Bc4 Qc4 20.Rb7 Ra1 21.Qa1 Qb5+=) 18...Qd6 19.Ra7 Ra7 20.Ra7 Bd5 (20...Qb8 21.Qa3+–) 21.Qc2+– f5 22.Qc7 Qc7 23.Rc7 Nf6 24.Ne5 g5 (24...Ra8 25.f3+–) 25.f3 g4 (25...Ra8 26.Kf2+–) 26.fg4 fg4 27.Ng4 Ng4 28.Bg4 Rf7 29.Rc8 Kg7 30.Rb8 Bc4 31.h3 Bb5 (31...Rf1 32.Kh2 Re1 33.Rb6 Re3 34.Rb7 Kf6 35.Bf3+–) 32.Rb6 Bc4 33.Be6 Be6 34.Re6 h5 (34...Rd7 35.Kf2+–) 35.d5 Rd7 36.d6 h4 (36...Kf8+–) 37.Re7 Re7 38.de7 Kf7 39.e8Q! Ke8 40.Kf2 (40.Kf2 Kf7 41.Kf3+–) 1–0. Panza (2480) – roo62 (2135), ChessWorld.net, 2007. (=1.Nf3 d5 2.b4 e6 3.b5 c6)

4.c4 dc4 5.e3 Bd6 6.Bc4 0-0 7.Qb3 (7.Ba3 a6=) 7...h6 (7...a6 8.d4=+) 8.Nd4 (8.d4!?=) 8...Nbd7 9.Ne6? (better 9.0-0=+) 9...fe6-+ 10.Be6 Kh8 (10...Kh8 11.Bd7 Nd7-+) 0-1. bjagus (1610) - Fasttt (2150), lichess.org, 2015. (=1.Nf3 e6 2.b4 d5 3.b5 Nf6)

4.e3 c5 5.c4 d4 6.ed4 cd4 7.Bb2 Bc5 8.Ne5 Nbd7 9.Nd7 Nd7 10.Qf3 0-0 11.Bd3 f5 12.a4 e5 13.Qd5 (13.Bf5? Nb6 14.g4 g6–+) 13...Kh8 14.0-0 e4 15.Be2 d3 16.Bd1 Qc7 17.Nc3?? (better is 17.Ba3–/+) 17...Nf6 18.b6 (18.Qc5 Qc5 19.Ba3–+) 18...ab6 (18...Nd5?! 19.bc7 Nc7 20.Ba3–+) 19.Nb5 Nd5 20.Nc7 Nc7 21.Be5 Ne6 22.Bb3 Bd7 23.Kh1 h6 24.f4 Kh7 25.h3 g5 26.g3 Nd4 27.Bd4 Bd4 28.Ra2 Bc5 29.fg5 (29.Kh2 gf4 30.gf4 e3 31.de3 Be3–+) 29...hg5 30.Kg2 Bc6 31.Kh2 f4 32.gf4 gf4 33.h4 (33.a5–+) 33...e3 34.de3 fe3 35.Rf8 Rf8 36.Bd1 Rf2 37.Rf2 ef2 (37...ef2 38.Bf3 f1Q 39.Be4 Be4 40.Kg3 Qf3 41.Kh2 Qg2) 0–1. themuttsknutts – biohuman, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.b5 Nf6)

4.e3 Bd6 5.Ba3 Ba3 6.Na3 Qe7 =+.

4.e3 Bd6 5.Nc3 Nbd7 (5...e5 6.Be2+=) 6.Be2 Ne4 7.Bb2 0-0 8.0-0 Nc3 9.dc3 Qf6 10.Rb1 Ne5 11.Ne5 Be5 (11...Qe5 12.g3+=) 12.Qd3 Qh4 (12...Qh6 13.f4 Bd6 14.c4 dc4 15.Qd4=) 13.f4 Bf6 14.Rf3 Qh6 15.c4 Bb2 16.Rb2 Qf6 (16...Rd8 17.Qc3+=) 17.Qd4 Qd4 18.ed4 c6 (18...dc4 19.Rc3+/–) 19.bc6 bc6 20.Kf2 Rd8 (20...Ba6 21.cd5 Be2 22.Ke2 cd5 23.Rfb3+=) 21.cd5 (21.Rfb3 h6+/–) 21...ed5 22.Rc3 Bd7 23.Rb7 a5 24.Rcb3 Kf8 25.R3b6 h6 26.Bd3 Ke8 27.Ke3 Kf8 28.Rc7 Rac8 29.Rc8 Rc8 30.Ra6 Re8 31.Kf3 Re1 32.Ra5 Ke7 33.a4 c5 34.dc5 d4 35.Ra6 Be8 36.a5 Rh1 37.Rb6 Rh2 38.a6 Rh1 39.a7 Ra1 40.Ba6 (40.Ba6 d3 41.cd3 Rf1 42.Ke2 Rf4 43.a8Q+–) 1–0. gtate (2475) – gmgenius (2410), net–chess.com, 2007.

4.e3 Bd6 5.d4 0-0 +=.

4.e3 Bd6 5.d4 a6 (5...Ne4 6.Ba3=+) 6.c4= 0-0 7.c5 Be7 8.Qa4 b6 9.c6 Ne4 10.Bd3 Bf6 11.Bc2 (11.Be4 de4 12.Nfd2 e5 13.Ne4 ed4+=) 11...Nc5= 12.Qa3 Ne4 13.0-0 Re8 (13...Qe7 14.Ne5+=) 14.Bb2 (14.Nbd2 Be7 15.Qd3 Nf6+=) 14...Qe7 (14...Be7 15.Qa4+=) 15.Qe7 (15.Qa4 Nc5 16.Bh7 Kh7 17.dc5 bc5 18.Bf6 Qf6+=) 15...Be7 16.a4 Nd6 (16...ab5 17.ab5 Ra1 18.Ba1+=) 17.Na3 ab5 18.ab5 White creates threats along the open a–file 18...Ra5 19.Bd3 Rf8 (19...Nf5 20.Nc2+/–) 20.Bc3+/– Ra3 21.Ra3 Nb5 22.Ra8 Nc3+/– 23.Rb8 Bb4 24.Ra1+– Ba5 25.Nd2 Re8 26.Nb3+– Bd7? 27.Rb7 Bc6 28.Rc7 Bb5 29.Na5 Bd3 30.Rc3 Be2 31.Nb7 Rb8 32.Rc7 f6 33.Nd6 g5 34.f3 h5 35.Raa7 Bd3 36.e4 Be4 37.fe4 b5 38.Rg7 Kh8 39.Rh7 Kg8 40.Rag7 Kf8 41.Rg6 (41...Rb7 42.Rb7 de4 43.Rf7) 1–0. Winiger,Albert – Jonsson,Gudbrandur, TT–07 ETC, 2003.

3.c3 (--> 1.b4 e6 2.c3 d5 3.Nf3).

4.c3 Ba5 5.e3 Nf6 6.Bd3 Nc6 7.a3 Bd7 8.Bb5 a6 9.Bc6 Bc6 10.0-0 0-0 (10...Bb5 11.Re1–+) 11.h3 (11.a4 Re8–/+) 11...Re8 (11...Bb5!? 12.Re1–+) 12.a4 b5 13.ab5 Bb5 (13...ab5 14.Ne5 Bb7 15.Qd3–/+) 14.Re1?? (better is 14.Ra5 c6 15.Ra1 Bf1 16.Qf1+=) 14...c6–/+ 15.Ba3 Ne4 16.Bb2 c5 17.dc5 Nc5 18.Qd4? (better is 18.c4 Be1 19.cb5 Bf2 20.Kf2 ab5 21.Ra8 Qa8 22.Qd4 Ne4 23.Kg1–+) 18...Nb3 19.Qe5 Bc7 (19...Na1 20.Ba1 Bc7 21.Qh5–+) 20.Qg5 (20.Qh5 Na1 21.Ng5–+) 20...Qg5 21.Ng5 Na1 22.Ba1 h6 23.Nf3 Kh7 24.Rd1 g6 25.Nd4 Bc4 26.Na3 g5 27.g4 a5 28.Nab5 Re7 29.f3 a4 30.Bb2 Kg6 31.Ba3 Rd7 32.Bd6 Bd6 33.Nd6 Rd6 34.Kf2 a3 35.Ra1 Rb6 36.Nc2 Rb2 37.Rc1 a2 38.Ra1 Rc2 39.Ke1 Rh2 40.Kd1 0–1. rgp – pieeater, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.d4 Bb4)

4.c3 Bd6 5.e3 Nf6 6.Nbd2 0-0 7.g3 (7.c4 b6–/+) 7...Nc6 8.Bh3 (8.c4 e5 9.c5 Be7–+) 8...Ne4 (8...e5 9.Bc8 Qc8 10.de5 Ne5 11.0-0–+) 9.0-0 (9.Ne4 de4 10.Nd2 f5–/+) 9...e5 (9...Nc3 10.Qb3 Ne2 11.Kg2 Nc1 12.Rfc1–+) 10.Bg2 (10.Bc8 Rc8 11.Ne4 de4 12.Nd2–/+) 10...Nc3 11.Qb3 Ne4 (better is 11...Ne2 12.Kh1 e4–+) 12.Qd5–/+ Nd2 13.Bd2 Be6 14.Qe4 1–0. Willi_weizenkeim – Ndrun1, playchess.de, 2002.

4.c3 Bd6 5.e3 Nf6 6.Qd3 Nc6 7.Qb5 a6 8.Qa4 b5?? (better is 8...Rb8–/+) 9.Bb5!+/– 0-0? (9...ab5 10.Qa8 Pinning (10.Qa8 Deflection)) 10.Bc6+– Rb8 11.Nbd2 Qe7 12.Ba3 (better is 12.0-0+–) 12...Ba3= 13.0-0 Bd6 14.Rab1 Rb1 15.Nb1 Ne4 (better is 15...Rd8=) 16.Qa6?? (better is 16.c4+=) 16...Ba6–+ 17.Re1 (17.Rc1 Bd3–+) 17...g6 (17...Rb8 18.Nbd2 Nc3 19.e4 de4 20.Ne4 Na2 21.Ra1–+) 18.h4 (18.Rc1 Rb8 19.Nbd2 Nd2 20.Nd2 Rb2–+) 18...Rb8 19.Ng5 Ng5 20.hg5 Qg5 21.f4 Qg3 22.Rf1 Qe3 23.Rf2 Rb1 24.Kh2 Bf4 25.Rf4 Qf4 26.g3 Qf2 27.Kh3 Rh1 (27...Rh1 28.Kg4 Qf5) 0–1. madjack20 – pieeater, ChessWorld.net, 2013.

4.c3 Be7 5.Ne5 f6 6.Ng4 e5 7.Ne3 c6 8.Qa4 Bd7 9.de5 fe5 10.Qb3 Qc7 11.g4 Nf6 12.f3 d4 13.cd4 ed4 14.Nf5 Bf5 15.gf5 Nbd7 16.Qe6 Nc5 17.Qc4 0-0-0 18.Bg5 Qe5 19.Bh3?? (19.Nd2–+) 19...d3 20.Qe6 (20.Nc3 de2 21.Qe2 Qc3 22.Kf2 Nfe4 23.fe4 Bg5 24.Rad1 Qh3 25.Qf3 Ne4 26.Qe4 Bh4 27.Ke2–+) 20...Ne6 21.Bf6 Qe2 0–1. dhub noire – Mr.Oldenslo, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.d4 Bb4)

4.c3 Be7 5.Ne5 Nf6 6.Bg5 0-0 7.Qd3 Nbd7 8.Bf6 Bf6 (worse is 8...gf6 9.Nd7 Bd7 10.Nd2–/+) 9.Ng4 Bg5 10.e3 f5 11.Qb5?? (better is 11.Ne5–+) 11...fg4 12.Be2 Nf6 13.0-0 Ne4 14.Qd3 Qf6 15.f3 gf3 16.Nd2 (16.Bf3 Qh6 17.Re1 Rf3 18.gf3–+) 16...f2 17.Rf2 Qf2 18.Kh1 Nc3! 19.Rf1 (19.Qc3 Qe3 Double attack (19...Qe2 Deflection; 19...Qe3 Decoy; 19...Qe2 Overloading)) 19...Qe2 20.Qc3 Rf1 21.Nf1 Qf1 0–1. madjack20 – David Lonsdale, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 e6 3.d4 Bb4)

4.Bd2 Bd2 5.Nbd2 Nf6 6.Ng5 0-0 7.e4 de4 8.Nde4 Nd5 9.Qh5 h6 10.c4 Nb4 11.Ne6 Be6 12.d5 Nc2 13.Kd1 Na1 14.Bd3 Bc8 15.Nc5 c6 16.dc6 Nc6 17.Qf5 Bf5 18.Kc1 Bd3 19.Nd3 Qd3 20.Rd1 Qc4 21.Kb1 Nc2 22.Rc1 N6d4 23.Rc2 Qc2 24.Ka1 Qc1 0–1. Cavanagh,Philip – NN, Yahoo! Chess, 2001.

4.Bd2 Qd6 5.g4 Nc6 6.c3 Ba5 7.Na3?? (better is 7.Bg2–/+) 7...Qa3–+ 8.Ng1 (8.Qb3 Qd6 9.Bg2–+) 8...Bc3 9.Bc3 (9.Rb1 Bd4 10.e3–+) 9...Qc3 10.Qd2 Qa1 11.Qd1 Qa2 12.e3 Qa5 13.Ke2 Nge7 14.f4 b6 15.Nf3 0-0 16.Nd2 Ba6 (16...e5!? 17.fe5 Bg4 18.Nf3–+) 17.Ke1 Bf1 18.Kf1 Qc3 19.Qe2 a5 0–1. russrogers – yetzaline (2190), net–chess.com, 2011.

4.Bb2 f6 5.Nh4 Nh6 6.Qh5 Kf8 7.f4 Qe8–/+ 8.Qf3 Nc6 9.a3 Ba5 10.Bd3 Bd7 11.0-0 Bb6 12.Nc3 a6 13.Rae1 Qf7 14.Na4 Ba7 15.Nc3 Ne7 16.Ne2 b5 17.Bc3 c5–/+ 18.Ng3 Nc6 19.f5 e5–/+ 20.Be2 b4 21.Bb2 a5 22.Nh5 Rg8 23.ab4 Nb4 24.c3 Nc6 25.Rb1 Ne7 26.Ng3 a4 27.Ba3 e4 28.Qf2 Nc6 29.Qf4 Ke8 30.Bh5 g6 31.fg6 hg6 32.Qh6 gh5 33.Rf6 Qe7 34.Nhf5 Bf5 35.Nf5 Qe5 36.Re6 (36.Re6 Kd7 37.Re5 Rg2 38.Kg2 Rg8 39.Ng7 Rb8 40.Rd5 Ke7 41.Rf1 Rb6 42.Bc5#; 36.Rc6?! Qf5 37.Ra6 Rg2 38.Kg2 Qg4 39.Kh1 Qf3 40.Kg1 Qg4 41.Kf1 Qf3 42.Ke1 Qh1 43.Ke2 Qf3 44.Ke1 Qh1 45.Ke2 Qf3 46.Ke1=) 1–0. gtate (1910) – alwayslosing (1985), net–chess.com, 2006.

4.c4 Be7 5.Bb2 Bf6 6.d4 Ne7 7.Bd3 dc4 8.Qa4 Bd7 9.Qc4 b5 10.Qc2 Bc6 11.e4 g6 12.d5 Bb2 13.Qb2 0-0 14.h4 ed5 15.Nbd2 de4 16.Ne4 Be4 (16...Qd3 17.Nf6 Kh8 18.Nd7 f6 19.Nf8 Bf3 20.gf3 Qf3 21.Rg1–+) 17.Be4 c6 18.h5 Qa5 19.Ke2 Nd5 (19...Re8 20.Kf1 Qa4+=) 20.hg6= Nf4 21.Ke3 (21.Kf1 fg6 22.Qb3 Kg7=) 21...Ng6 (better is 21...Ng2!? 22.Ke2 Nf4 23.Kf1 Ng6 24.Bg6 fg6 25.Qb3 Kg7 26.Qb2 Kg8 27.Qb3 Kh8 28.Qb2 Kg8=) 22.Bg6 Qb6 23.Kd2?? (better is 23.Ke2 fg6 24.Qb3 Kg7 25.Qc3 Kg8 26.Qb3 Kh8 27.Qc3 Kg8 28.Qb3=) 23...Qd8?? (better is 23...Qf2 24.Kc1 Qb2 25.Kb2 hg6–+) 24.Bd3+– Nd7 1–0. Herreros Angrill,Jaime (1935) – Crusats Mir,Josep (1800), Barcelona ESP, 1st Tona Open, 2011.

4.c4 Nf6 5.cd5 Nd5 6.Bb2 0-0 7.Qc2 Be7 8.d4 Nc6 9.a3 Bd7 10.Bd3 g6 11.Nbd2 Bf6 12.Ne4 Bg7 13.Neg5 Nce7 14.Nh7 Kh7 15.Bc1 Kg8 16.e4 Nf6 17.Ng5 a6 18.Bd2 Bb5 19.Bb5 ab5 20.h4 Qd4 21.0-0-0 Qa1 22.Qb1 Qa3 23.Qb2 Qb2 24.Kb2 Ne4 25.Kc1 Ra1 26.Kc2 Ra2 27.Kd3 Nf2 28.Ke2 Nh1 29.Rh1 Rd8 30.Ne4 f5 31.Ng5 Rdd2 32.Ke3 Re2 0–1. ursus11 – gomelo715 (1700), kurnik, 2012.

3.a3 a5 4.b5 Nf6 5.e3 Nbd7 6.Bb2 e6 7.Be2 c5 (7...Bd6 8.Nd4+=) 8.Nh4= Bg6 9.0-0 c4 10.Nc3 Rc8 11.f4 Bd6 12.f5 (12.Rf3 Nc5=) 12...ef5 13.Nf5 Bf5 14.Rf5 Be5 15.Qe1 0-0 16.Qh4 Re8 17.Rd1 Nf8 18.Kh1 Qd7 19.Rdf1 (19.Qh3 Ng6+=) 19...Ng6–/+ 20.Qh3 Rcd8 21.a4 (21.Bg4!? Ng4 22.Qg4–/+) 21...d4–/+ 22.ed4 Qd4 23.R5f2 Qd2 (23...Qc5 24.Bc1–/+) 24.Bc4 Qd4 25.Ba2 Qf2 (25...h6 26.Qf3 Qb4 A) 27.Qb7? Re7 (27...Qb2?! 28.Bf7 Kh7 29.Ne4=) 28.Qb6 Rd6 29.Qb8 Kh7–+; B) 27.Bb3+=) 26.Rf2 Bc3 27.Rf1 Bb2 28.Qb3 Bd4 29.Qf7 Kh8 30.Qb7 Ng4 31.h3 (31.c3 Nf2 32.Kg1–+) 31...Nf2–+ 32.Kh2 Ne4 33.Bf7?? (33.g3 Re7 34.Qc6–+) 33...Re7–+ 34.Qa6? (34.Qc6 Be5 35.Kg1–+) 34...Be5 35.Kg1 Ng3 36.Bc4 Bd4 37.Kh2 Nf1 38.Bf1 Rf8 39.Qa5 Be5 40.Kg1 Bg3 41.b6 Re1 42.Qb5 Ref1 43.Qf1 Bh2!! 0–1. yulio (1970) – gambit_queen (2160), gameknot.com, 2014.

3.Ba3 Nf6 4.e3 Nbd7 5.Bb5 c6 6.Bd3 Bg4 7.0-0 e5 8.Be2 a5 9.c3 (9.b5 cb5 10.Bf8 Rf8+=) 9...ab4–/+ 10.cb4 Bd6 11.d3 Qe7 12.Bb2 Bb4 13.Qb3 e4 14.de4 de4 (14...Qe4?! 15.Bc3 Bc3 16.Nc3+=) 15.Nd4 Be2 16.Ne2 Bd6 17.Bd4 Nc5 18.Qc2 0-0 19.Nd2 Nd3 20.Nc3 Bh2! 21.Kh2 Ng4 22.Kh3 Qe6 23.Kh4 Ngf2 24.Rf2 g5! 25.Kg3 Qd6 26.Rf4 gf4 27.Kh2 fe3 28.g3 Qd4 29.Nde4 e2! 30.Qe2 f5 31.Rd1 fe4 32.Ne4 Rfe8 33.Rd3 Qe4 34.Qe4 Re4 35.a3 Rea4 36.Rd7 Ra3 37.Rb7 Rc8 38.Re7 c5 39.Kh3 c4 40.Re2 c3 41.Rc2 Rb3 42.g4 Rb2 43.Rc1 c2 44.Kh4 Rb1 45.Rc2 0–1. crafty – Evarist, ICC, 1998.

3.a4 e6 4.c3 c5 (4...Nf6 5.Nh4=+) 5.bc5 Bc5 6.Ba3 Be7 (6...Ba3 7.Na3 Nf6 8.e3=+) 7.Qb3 Qc7 8.e3 Nc6 9.c4 Nf6 10.Nc3 dc4 11.Bc4 0-0 12.Be2 a6 (12...Ba3 13.Ra3 e5 14.0-0=+) 13.0-0 Rfd8 14.d4 Rac8 15.Rfc1 h6 16.Qb2 Ba3 17.Ra3 Qe7 18.Nd1 Ne4 19.Nc3 e5 20.Ne4 Be4 21.de5 (worse 21.Ne5 Nd4 22.Bc4 Qe5 23.ed4 Rd4-+) 21...Ne5 (better 21...Bf3 22.Bf3 Ne5=) 22.Rc8+/- (22.Ne5?! Rc1 23.Qc1 Qe5=) 22...Rc8 23.Qe5 (worse 23.Ne5 Rc2 24.Qa1 Re2-/+) 23...Qa3 24.Qe4 Qa1 25.Bf1 Rc1 26.Nd2 Rd1 27.Qc2 Rc1 28.Qd3 Rd1 29.Qd8 Kh7 30.Qd3 Kg8 31.Qd7 Qc1 32.Qe8 Kh7 33.Qe4 Kg8 34.Qe8 Kh7 35.Qe4 Kg8 36.Qe8 ½-½. marekt (2170) - perrito (2120), internet, 2020. (=1.Nf3 d5 2.b4 Bf5)

3.b5 e6 4.e3 Nf6 5.c4 c6 6.a4 Bb4 7.Bb2 0-0 8.Qb3 Be7 9.Be2 Nbd7 10.d4 c5 11.0-0 h6 (11...dc4 12.Bc4 Nb6 13.Be2=) 12.Nbd2 Bh7 13.Rac1 b6 14.Rfd1 Re8 15.Bd3 Bd3 16.Qd3 Bf8 (16...a6 17.Nb3 ab5 18.ab5=) 17.Ne5 dc4 (17...Rc8 18.Nd7 Nd7 19.cd5 ed5 20.Qf5+/–) 18.Ndc4+/– Ne5 19.Ne5 Nd5 20.f4 (20.e4 Nf6 21.Nc6 Qc7 22.dc5 Qf4 23.Bf6 Qf6 24.cb6 ab6+–) 20...Nb4 21.Qe2 Qc7 22.g4 Qb7 23.Qg2 Qg2 24.Kg2 Nd5 25.Kf3+/– Nf6 26.Nd3 Rec8 27.dc5 Bc5 28.Nc5 Rc5 29.Rc5 bc5 30.Bf6 gf6 31.Ke4 Kf8 32.Rd7 a6 33.b6 Rb8 34.a5 Rc8 35.Rc7 Rb8 36.Rc5 Ke8 37.Rc7 Kd8 38.Kd4 Rc8 39.Rc8 Kc8 40.Kc5 Kd7 41.h4 f5 1–0. Wiczynski,Artur – Raczynski,Milosz, Poland–ch U10, 2003.

3.b5 Nf6 4.Bb2 e6 5.Nh4 (5.e3 Bd6=) 5...Bg6 (5...Bg4 6.h3 Bh5 7.g4+=) 6.Ng6 hg6 7.e3 Bd6 8.Be2 (8.h3 a6=) 8...Nbd7 (8...Bh2? 9.Be5+–) 9.d4 (9.h3 Qe7+=) 9...Ne4 10.Bd3 Rh2 11.Rh2 Bh2 12.Be4 (12.g3 Ndf6 13.Kf1 Qd7=) 12...de4 13.g3 Qg5 14.Nd2 (14.Qe2 Nf6 15.Nd2 Qf5+=) 14...f5 (better is 14...Qb5 15.Rb1 f5–/+) 15.Qe2+= Bg3 (15...0-0-0 16.0-0-0+=) 16.fg3 Qg3 17.Qf2 Qf2 18.Kf2 Kf7 (18...a6 19.a4+=) 19.Rh1 (19.Rg1 a6 20.ba6 Ra6=) 19...a6= 20.a4 (20.ba6 Ra6 21.a3 g5=) 20...ab5 (20...Nb6 21.a5 Na4 22.ba6 Ra6 23.Ba3=) 21.ab5 Ra2 22.Nc4 Ra4 23.Na3 Nf6 24.c3 Nd5 25.Ra1 g5 26.c4 Nb4+= 27.Ke2 Nd3 28.Bc3 f4 29.Nc2? Rc4 30.Ra3 f3 31.Kf1 g4 32.Ne1 Nc1 33.Bd2 Ne2 34.Ra1 g3 35.Rb1 b6 36.Rb4 Rc2 37.Nc2 g2 (37...g2 38.Kf2 g1Q#) 0–1. mic (2130) – mpenga (2390), net–chess.com, 2008.

3.c3 Nf6 4.d3 e6 5.Nd4 Bg6 6.Bf4 Nbd7 7.Qa4 Be7 8.Nf3 0-0 9.Qb5 c5 10.Qb7 cb4 11.cb4 e5 12.Ne5 (better is 12.Be5!? Ne5 13.Ne5=+) 12...Rb8–/+ 13.Qa7 Bb4 14.Nd2 Bd2 (better is 14...Bc5 15.Nc6 Ba7 16.Nd8 Rbd8–/+ (16...Rfd8?! 17.Bb8 Rb8 18.e3=+)) 15.Kd2+= Ne5 16.Be5 Ne4?? (better is 16...Rc8+=) 17.de4+– de4 18.Ke1 e3 (18...Rb7 19.Qd4 Rd7+–) 19.Qd4 Qa5 20.Qc3 ef2 21.Kf2 Qb6 22.e3 Rfe8 (22...Ra8 23.Bg7 Rfc8 24.Qd4 Rc2 25.Kg3 Qc7 26.Be5+–) 23.Bb8 Qb8 24.a4 Qa7 25.Bb5 Rd8 26.Rhd1 Rf8 27.Rd7 Qb6 (27...Qb8 28.Qc7+–) 28.Qd4 Qe6 29.Rd8 Qf5 (29...Qe7 30.Rd1 h5+–) 30.Kg1 (30...Qc8 31.Rc8 Rc8 32.a5+–) 1–0. pierre – timbuktu12001, Yahoo, 2005.

3.Nc3 c6 4.e3 g6 5.Nd4 Bd7 6.Be2 (6.Bb2 e5 7.Nf3 e4 8.Ne4 de4 9.Bh8 ef3 10.Qf3 Bb4=) 6...Bg7 (better is 6...e5!? 7.Nf3 e4–/+) 7.0-0= e5 8.Nb3 Ne7 9.a4 f5 10.b5 (10.a5 Qc8+=) 10...0-0 11.Ba3 e4 12.Qc1 b6 13.d4 Be6 14.a5 c5 (14...ba5 15.Na5) 15.Qd2+/– c4 (better is 15...f4!? 16.ef4 Bh6 17.ab6 ab6+–) 16.ab6+– Nd7 17.Nc5 (better is 17.b7!? Rb8 18.Na5 Qa5 19.Be7 Qc7 20.Bf8 Bf8 21.Ra7 Rb7+–) 17...Nc5 (17...Bf7 18.ba7 Nb6 19.Bb4+–) 18.Bc5 (18.dc5?! ab6 19.cb6 d4 20.ed4 Bd4+–) 1–0. gtate (2475) – kode (2275), net–chess.com, 2007.

3.Nc3 e6 4.a3 Nf6 5.e3 a5 6.ba5 Ra5 7.Rb1 b6 8.Nd4 Ba3 9.Bb5 Nfd7 10.Nb3 Bc1 11.Na5 Bd2 12.Qd2 ba5 13.0-0 c6 14.Be2 0-0 15.Na4 Qc7 16.Rfc1 Ne5 (16...Rd8 17.Qc3=) 17.Nc5+= Nbd7 18.Rb7 Qd6 19.Nd7 Nd7 20.Qa5 Rc8 21.Qa7 Rd8 22.Bd3 Bd3 23.cd3 1-0. pvanr (2260) - eldeniz315 (1865), gameknot.com, 2020.

3.d3 Nd7 4.Bb2 e6 5.Nbd2 Bb4?? (better is 5...Ngf6 6.a3 c5=+) 6.Bg7+– Bc3 7.Bc3 Ngf6 8.e4 de4 9.de4 Bg6 10.g4 (better is 10.Rb1!? Nc5+–) 10...Rg8 11.Bf6 Qf6 12.h4 (12.Rb1 0-0-0+–) 12...h5 13.g5 (13.Rb1 0-0-0 14.g5 Qc3+–) 13...Qf4 (13...Qc3 14.Bd3+–) 14.Qe2 0-0-0 15.Rb1 Nc5 16.Qb5 b6 17.a4?? Be4? 18.Be2?? Bc2?? 19.Rb4+– Qd6 20.Rd4 Qe7 21.Rd8 Rd8 22.0-0 Bd3 23.Bd3 Nd3 24.Qa6 Kb8 25.a5 Qb4 26.ab6 cb6 27.Ra1 Rd7? 28.Ne5?? Ne5–+ 29.Rc1 Qg4 30.Kf1 Qh3 31.Ke2 Qg4?? 32.f3?? Qg2 33.Ke3 Qd2 (34.Ke4 Qd4) 0–1. lucky (1655) – leganes, internet, 2007.

3.d3 Nf6 4.g3 (4.a3 a5 5.b5 Nbd7=) 4...e6 5.Bd2 Bd6 6.a3 Nbd7 7.Bg2 h6 (7...0-0!?=+) 8.0-0 0-0 9.Be1 (9.c4 dc4 10.dc4 c6=) 9...c5 10.b5 Qc7 11.Nfd2 Rfd8 12.Nc3 Bg4 13.f4 c4 14.dc4 dc4 (14...Nb6 15.Bf2–/+) 15.Bf2 (15.h3 Bc5 16.Bf2 Qa5=+) 15...Bc5 16.Qe1 Bf2 17.Rf2 Nb6 18.e4 Rd7 (better is 18...e5!?=) 19.h3 Bh5 20.a4 Rad8 21.a5 Nc8 22.g4 Bg6 23.Nf3 (23.e5 Nh7 24.Nde4 Be4 25.Ne4+/–) 23...Qf4=+ 24.Nh4 (24.e5 Ne4 25.Ne4 Qe4 (25...Be4 26.Nh2 Qe5 27.Be4 Qb5 28.Rb1=) 26.Qe4 Be4=+) 24...Qg5 25.Ng6 Qg6 26.e5 Nd5 27.Be4 Qg5 28.Na4 (28.Bd5!? ed5 29.e6 fe6 30.Qe6 Kh7 31.Raf1=+) 28...b6 29.Nb2 Rc7 30.Ra4 c3 31.Nd3 ba5 32.Ra5 Qe3 33.Qe3 Ne3 34.Bc6? (better is 34.Re2!? Nc4 35.Ra6=+) 34...Nc2! 35.Rc2 Rd3 36.Kg2? (better is 36.Ra3!? Rh3 37.Rac3 Rc3 38.Rc3–/+) 36...Rd2 37.Rd2 cd2 38.Ra1 Ne7 (38...Nb6 39.Kf3 a6 40.Rd1–+) 39.Bf3 (39.Rd1 Nc6 40.bc6 Rc6 41.Rd2–+) 39...Ng6 40.Rd1 Rd7 41.Kf2 (41.Bc6 Rd8–+) 41...Ne5 42.Be2 (42.Bc6 Rd3–+ (42...Nc6?! 43.bc6 Rd6 44.Ke3–+)) 42...Nd3 (better is 42...g5!? 43.Bf1 f5 44.gf5 ef5 45.Ke3–+) 43.Ke3 Nb2 (better is 43...Nc1!? 44.Bc4 Rc7–+) 44.Rd2–/+ Rd2 45.Kd2 Kf8 (45...e5 46.h4–+) 46.Kc3 (better is 46.b6!? ab6 47.Bb5=+) 46...Na4–+ 47.Kb4 Nb6 48.Ka5 Ke7 49.Ka6 Nc8 50.Kb7 Kd8 51.h4 g5 52.hg5 hg5 53.Bd3 Kd7 (better is 53...f5!? 54.Be2–+) 54.Kb8–/+ f6 55.Bc2 Nd6 56.Ba4 Nb5 57.Bb5 Kd6 58.Ka7 Ke5 59.Kb6 f5 (59...Kf4 60.Bc4 e5 61.Be2–/+) 60.Be2? (better is 60.Kc5 fg4 61.Bc6–/+) 60...Kf4–+ 61.Kc5 fg4?? (61...Ke3 62.Ba6 f4= (62...fg4?! 63.Kd6=)) 62.Kd6?? (better is 62.Ba6=+) 62...g3–+ 63.Bf1 0–1. Jeremicius,S – Sileikis,V, ch Kaunas, 1999.

3.Nd4 Bg6 4.Nf3 e6 5.a3 Nf6 6.Bb2 h6 (6...Be7 7.e3=+) 7.e3= Nbd7 8.Be2 Be7 9.0-0 Be4 10.d3 Bf3 11.Bf3 (11.gf3 c5=+) 11...c6 12.c4 Qc7 13.cd5 cd5 14.Nd2 Bd6 15.Rc1 Qb8 16.h3 Rg8 (16...0-0 17.Qe2=) 17.Re1 g5 18.e4 de4 19.Ne4 Ne4 20.Be4 Bf4 21.Rc2 (21.Rc4) 21...f5?? (21...a5+/–) 22.Qh5+– Kd8 23.Bb7!! Qb7 24.Qf7 (24.Re6 Rc8 25.Rce2 Kc7 26.Qh6 Qd5=) 24...Rf8 (24...Re8 25.Bf6 Nf6 26.Qb7+–) 25.Bf6!! Nf6 26.Qb7 Rb8 27.Qg7 Nd7 28.Re6 Re8 29.Re8 Ke8 30.Re2 Be5 31.Re5 Ne5 32.Qe5 Kd7 33.Qb8 a6 34.Qb7 Ke8 35.Qc8 Ke7 36.Qf5 Kd6 37.Qc5 Ke6 38.Qc6 Kf5 39.d4 h5 40.d5 g4 (40...Ke4 41.d6 Kf5 42.d7 g4 43.d8Q gh3 44.Qdf6 Kg4 45.Qce6) 41.Qe6 Kf4 (41...Kg5 42.h4! Kf4 43.g3 Kf3 44.Qe3) 42.g3 Kg5 43.h4 1–0. wesolyPolak (1810) – bussundaal, GameColony.com, 2002.

3.Nd4 Nh6 4.a3 e5 5.Nf3 Bd6 6.g3 (6.d4 e4 7.Bh6 gh6+=) 6...e4 7.Nh4 Nc6 (7...Be6 8.Bb2 0-0 9.f3–/+) 8.Nf5 Nf5 9.Nc3 a6 10.Nd5 Be5 11.Nc3 Nfd4 (better is 11...Bc3 12.dc3 Qf6+=) 12.e3?? (better is 12.Bb2 f5 13.d3+=) 12...Nf3–+ 13.Ke2 Nfd4 (better is 13...Bc3 14.dc3 Qg5–+) 14.Ke1 (14.ed4!? Nd4 15.Ke3 Nf5 16.Ke4 Bc3 17.dc3 Qd1 18.Bb5 ab5 19.Rd1 Nd6 20.Kf3+=) 14...Nf3 15.Ke2 Bc3 16.dc3 0-0 (better is 16...Qg5 17.c4 Rd8–+) 17.Bg2 (17.Qd8 Rad8 (worse is 17...Nd8 18.Bg2+/–) 18.Bh3 f5+=) 17...Qd1 (better is 17...Qf6!? 18.Qd5 Qc3–+) 18.Rd1= Rfe8? (18...Nce5 19.Bf3 Nf3 20.Bb2=) 19.Rd7 (better is 19.Bf3 ef3 20.Kf3 Ne5 21.Ke2+–) 19...Rac8+= 20.Bh3?? (20.Bf3 ef3 21.Ke1 Ne5=) 20...Nh2 21.Bb2+= Ne5 22.Rd4 f5?? 23.Bf5+– Rcd8 24.Re4?? b5? 25.Rh1+– Nef3 26.c4 Rd2. Cycklone – Smartini, playchess.de, 2002. (=1.Nf3 d5 2.b4 Bf5)

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

3.e3 Nc6 4.b5 Nb4 5.d3 e6 6.a3 Nc2 7.Qc2 f6 8.Nd4 Nh6 9.Bb2 Bd6 10.e4 de4 11.de4 Bg4 12.h3 e5 13.hg4 ed4 14.g5 fg5 15.Bd4 Bb4 16.Bc3 Bc3 17.Qc3 0-0 18.Bc4 Nf7 19.Bd5 Qf6 20.Qf6 gf6 21.Bb7 Rad8 22.Nc3 Nd6 23.Bc6 Kg7 24.a4 h6 25.Ke2 Kg6 26.Rad1 g4 27.Nd5 Rf7 28.Rh4 Kg5 29.Rdh1 f5 30.Rh6 g3 31.f4 Kg4 32.R1h4# 1–0. SOS031199 – Nero51, computer chess game, 2001.

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

4.d4 Nd7 5.Bf4= Ngf6 6.e3 Be7 7.c4 a5 8.b5 0-0 9.Nc3 Ne4 10.Ne4= Be4 11.Nd2 Bg6 12.Be2 c6 13.0-0+= Nf6 14.Qa4 Qd7 15.bc6 Qc6 16.Qb3 Nh5 17.Bh5 Bh5 18.Rfb1 Ra7 19.c5 Bg6 20.Rb2 a4 21.Qb6 Rfa8 22.Bc7 Bd3 23.Nf3 f6 24.h3 h6 25.Rd1 Be4 26.Rdd2 Bf3 27.gf3 Kf7 28.Kh2 Kg8 29.Re2 Kf7 30.Rb5 Qd7 31.Reb2 Ra6 32.Qb7 R8a7 33.Ra5?? Rb7 (34.Rb7 Ra5 35.Ba5 Qb7–+) 0–1. Mestak,Kamil – Flazinski,Pawel, corr or01–014 E–mail, 2001.

4.d4 Nf6 5.Nh4 =+.

4.Nd4 Bg6 5.e3 Nf6 6.Bb2 Nbd7 7.Nb3 Bd6 8.Nc3 c6 9.Be2 Qc7 10.h4 h6 11.h5 Bh7 12.0-0 g6 13.hg6 Bg6 14.f4 Rg8 15.Nd4 0-0-0 16.Na4 Be4 17.Bf3 Rg6 18.Be4 Ne4 19.d3 Ng3 20.Rf2 Rdg8 21.c4 dc4 22.dc4 e5 23.fe5 Ne5 24.c5 Ne4 25.Rc2 Bc5 26.Nc5 Ng4 27.Nb5 Qh2 28.Kf1 Ne3 0–1. mtre – tt14, internet, 2002.

4.e3 c5 5.bc5 Bc5 6.d4 Bb6 7.c4 Nc6 8.c5 Bc7 9.Nc3 Nf6 10.Nb5 Bb8 11.Bb2 Ne4 12.Qb3 0-0 13.Nc3 Bc7 14.Ne4 Be4 15.Nd2 Bf5 16.Rc1 Rb8 17.Ba1 Re8 18.Be2 Ba5 19.Bc3 e5 20.de5 d4 21.Ba5 ½–½. Baer,Werner – Benassi,Aspasio, SEV 25, 2000.

4.e3 Bd6 5.Bb5 c6 6.Be2 Nf6 7.Nc3 a5 8.ba5 0-0 9.Nh4 Qc7 10.Nf5 ef5 11.f4 d4 12.Nb1 de3 13.de3 Qa5 14.Kf1 Bc5 15.Bd3 Re8 16.Bd2 Nd5 17.Qh5 Ne3 18.Be3 Re3 19.Qh4 Nd7 20.Bf5 Qb5 21.Bd3 Rd3 22.Rg1 Rd1# 0–1. NewRival1_8_29 – ArasanX54, GS WinterRapid, 2002.

4.Bb2 e6 =.

4.e3 e6 5.d4 a5 6.b5 =+.

4.e3 e6 5.d4 Bd6 6.c4 0-0 7.Nbd2 a5 8.b5 Nbd7 9.Be2 Ne4 10.Bb2 Nd2 11.Nd2 c6 12.c5 Be7 13.0-0 cb5 14.Bb5 Qc7 15.f3 Bg6 16.Rc1 Nb8 17.e4 Bg5 18.Re1 Nc6 19.Qe2 de4 20.fe4 Rad8 21.Rc4 Na7 22.Nf3 Bh5 23.Ba4 Bf4 24.h3 Bf3 25.gf3 b5 26.cb6 Qb6 27.Kh1 Rb8 28.Ba1 Nb5 29.Qb2 Qd8 30.e5?? Nd6!–+ 31.Qe2 Nc4 32.Qc4 Qh4 (33.Qf1 Qg3–+) 0–1. Baer,Werner (2270) – Buettner,Fritz (2305), 7.CH/1–XP99, 1999.

4.e3 e6 5.d4 Nbd7 6.c4 c6 7.Nc3 Bd6 8.Bb2 0-0 9.c5 Bc7 10.Be2 Re8 11.Nh4 Ne4 12.Nf5 ef5 13.g3 Qf6 14.Bd3 b6 15.cb6 ab6 16.Qc2 Qe6 17.0-0 Bd6 18.Ne2 Rec8 19.Rad1 c5=+ 20.dc5 bc5 21.bc5 Ndc5 22.Nd4 Qg6 23.Nb5 Na4 24.Qe2 Nb2 25.Qb2 Be7 26.Qe5 Qe6=+ 27.Qb2 Bf6 28.Qe2 Rc5 29.Rc1 Nc3 30.Nc3 Bc3 31.Qa2 f4 32.ef4 d4 33.Rc2 Rca5 34.Qe6 fe6 35.Be4 (35.Re2 Kf7=) ½–½. Mestak,Kamil – Pech,Jaroslav, corr or01–014 E–mail, 2002.

4.e3 e6 5.Be2 Bd6 6.0-0 a5 7.Re1 (7.b5!?=) 7...ab4–/+ 8.a4 0-0 9.d3 c5 10.e4 (better is 10.Bb2!?–/+) 10...de4–+ 11.de4 Ne4 12.Bd3 Nc6 13.Nbd2?? (13.Qe2 Qf6 14.Ra2–+) 13...Nc3 14.Bf5 Nd1 15.Rd1 ef5 16.Nf1 (16.Bb2 Qc7–+) 16...Qc7 (better is 16...Bh2 17.Kh2 Qd1 18.Ne3 Qd6 19.g3–+) 17.Ne3 (17.Bb2 Ne5 18.N1d2 Rfe8–+) 17...Ne5 18.Nh4 Ng4 19.g3 Ne3 20.Be3 f4 21.Bf4 Bf4 22.Rd5 (22.gf4 Qf4 23.Ng2 Qg4–+) 22...Be5 23.Re1 Bc3 24.Re2 Rfe8 (24...Rfe8 25.Re8 Re8–+) 0–1. pieeater – Subedei, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 Bf5 3.a3 Nf6)

4.e3 a5 5.c3 ab4 6.Bb4 c5 7.Bb5 Nc6 8.Ne5 Qc7 9.Bc6 bc6 10.Bc5 Bc5 11.d4 Bd6 12.f4 Qb6 13.Qc1 f6 14.Nf3 Bd3 15.Nfd2 Ne7 16.Nf3 0-0 17.Kf2 c5 18.Rd1 Be4 19.Nbd2 cd4 20.Nd4 Ba3 21.Qa3 0–1. Lindberg,Rune – Wagner,Josef, MCO, 1996.

4.e3 Nf6 5.d4 Bd6 6.c4 dc4 7.Bc4 Qe7 8.0-0 0-0 9.Bd3 Bd3 10.Qd3 Bb4 11.Bb4 Qb4 12.Nbd2 Qe7 13.Rab1 b6 14.Rfc1 a5 15.Ne4 Ne4 16.Qe4 Na6 17.Ne5 Nb4 18.Nc6 Nc6 19.Rc6 Rfd8 20.Rbc1 Ra7 21.Qe5 Rd7 22.R1c4 a4 23.Kf1 h6 24.Qe4 Rd6 25.Kg1 a3 26.Rc1 Rc6 27.Qc6 Qd8 28.f4 g6 29.Rb1 Kg7 30.Rb5 Qh4 31.Qc3 Qe7 32.h3 Ra8 33.Qc6 Qe8 34.Qe8 Re8 35.Kf2 Kf6 36.e4 Ke7 37.g4 Rd8 38.Ke3 h5 39.g5 Re8 40.Rb4 Ra8 41.h4 Kd7 42.e5 Ke7 43.Rc4 Ra7 44.Rc3 Kd7 45.Rc4 Ra5 46.Rb4 Ke7 47.Ke4 Ra8 48.Rc4 Kd7 49.Rb4 Ra7 50.Rb3 Ra4 51.Ke3 Kc6 52.Rc3 Kb7 53.Rd3 c6 54.Rc3 Rb4 55.Ra3 Rb2 56.Ra4 Rh2 57.Kf3 Rh3 58.Ke4 Rh4 59.Ke3 Rh3 60.Ke4 h4 61.Rb4 Rh2 62.a4 Ra2 63.Rb3 Ra4 64.Rh3 c5 65.Rh4 Rd4 66.Ke3 b5 67.Rh7 Rd7 68.f5 Kc6 69.fg6 fg6 70.Rh6 c4 71.Rg6 c3 72.Re6 Kc7 73.Ra6 c2 74.Ra7 Kc6 75.Rd7 c1Q 76.Rd2 Qc3 77.Ke2 Qe5 78.Kd1 Qg5 79.Rb2 b4 80.Kc2 Kc5 81.Kb1 b3 82.Rb3 Kc4 83.Rb2 Qf5 84.Ka2 Qe5 85.Rc2 Kd3 86.Kb1 Qe4 87.Rb2 Kc3 88.Ka1 Qe1 89.Ka2 Qd1 90.Rh2 Qb3 91.Ka1 Qb8 92.Re2 Qf4 93.Kb1 Qf1 94.Re1 Qe1 95.Ka2 Qd1 96.Ka3 Qa1# 0–1. Betsy_651 – SmarThink017a, RWBC Class B 3rd edition, 2003.

4.e3 Nf6 5.d4 Bd6 6.c4 dc4 7.Bc4 Qe7 8.0-0 Bb4 9.Qa4 Nc6 10.Ba6 Ba3 11.Bb7 +/–.

3.Bb2 (--> 1.b4 d5 2.Bb2 Bf5 3.Nf3).

3.Bb2 Nd7 4.e3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nd7 4.Nf3).

3.Bb2 Nd7 4.e3 e6 5.Be2 Ngf6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2).

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

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

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

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

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

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

4.d3 Nf6 5.Bg5 Be7 6.Qa4 c6 7.Nd4 Bg6 8.Nd2 0-0 9.N2f3 Nbd7 10.Nh4 Ne5 11.Ng6 hg6 12.Nb3 Qc7 13.Qa5 b6 14.Qa6 Rad8 15.Nd4 Rd7 16.Rb1 c5 17.Nb5 Qc6 18.Bf4 Neg4 19.h3 Nh6 20.bc5 Bc5 21.Be5 Nf5 22.g4 Nh4 23.g5 Nh5 24.Na7 Ra7 25.Qa7 d4 26.Rg1 dc3–/+ 27.Rg4 c2?? 28.Rc1= Bb4?? 29.Rb4+– f6 30.Rb6 Qc5 31.Bb2 Qd5 32.gf6 Rf6 33.Bf6 gf6 34.Rb8 (34...Qd8 35.Rd8) 1–0. pierre – timbuktu12001, Yahoo, 2005.

4.e3 Bd6 5.d4 Nf6 6.Bd3 Bd3 7.Qd3 Nbd7 8.a4 0-0 9.a5 b6 10.0-0 Ne4 11.c4 Bb4 12.cd5 ed5 13.Qb3 Ba5 14.Qd5 Re8 15.Nbd2 Nc3 16.Qh5 Nf6 17.Qh4 Ne2 18.Kh1 Bb4 19.Bb2 Bc3 20.Bc3 Nc3 21.Rfc1 Nce4 22.Rc6 a6 23.Nc4 Ng4 24.Qd8 Red8 25.Rc7 Ngf2 26.Kg1 Rdb8 27.Rc6 b5 28.Nb6 Ra7 29.Nc8 Raa8 30.Nb6 Ra7 31.Nc8 Rab7 32.Nd6 Nd6 33.Rd6 Ng4 34.e4 b4 35.h3 Ne3 36.Kf2 Nc2 37.Raa6 b3 38.Nd2 b2 39.Rac6 Na3 40.d5 b1Q 41.Nb1 Nb1 42.Ke3 h6 43.e5 Rb2 44.g3 R8b3 45.Kd4 Rg3 46.e6 fe6 47.de6 Rd2 48.Kc5 Re2 49.Rd8 Kh7 50.Rb6 Nc3 51.Ra8 Ne4 52.Kd4 Nf6 53.h4 Rg4 0–1. White – Scheepers, email CTON 1997.

4.Na3 e6 5.Nc4 Bb4 6.Qa4 Nc6 7.Bb2 Bf8 (7...Nf6!? 8.Nfe5 Ne4-/+) 8.Nce5+= Qd5 9.Rc1 Nge7 10.d3 b5 11.Qc2 Ne5 12.Ne5 f6 (worse 12...Qa2 13.Qc7 Rd8 14.Bc3+/-) 13.e4 Qd6 (13...Qa2?? 14.Ra1 (14.ef5?! fe5 15.fe6 Qe6=+) 14...Qa1 15.Ba1 fe5 16.ef5 Nf5 17.g4+-) 14.ef5 fe5 15.fe6 Nd5 16.d4 ed4? (better 16...0-0-0 17.Be2 Qe6+/-) 17.Bb5+- Ke7 (17...Kd8 18.0-0 c5+-) 18.0-0 g6 (18...Rb8 19.a4 Nf6+-) 19.Bd4 Rd8 (19...Bh6 20.Bc5 Bc1 21.Rc1+-) 20.Bh8 Bh6 21.Rcd1 Rh8 22.Bc6 Nb4 (22...Rf8 23.Rd5 Qe6 24.Qc3+-) 23.Qc3 Qc6 1-0. Onikashvili (2020) - annaly (2035), Rated Classical game, lichess.org, 2016.

4.e3 Bd3 5.Ne5 Qd5 6.Nd3 cd3 7.Nc3=+.

4.e3 e6 5.Bc4=+ Bb4 (5...c6 6.Qb3=) 6.Bb2 (6.Qa4!? Nc6 7.Bb5=) 6...Bf8=+ 7.0-0 c6 8.d4 (8.a4 Nf6=+) 8...Nd7 9.Nbd2 h6 (9...Ngf6 10.Be2=+) 10.e4= Bh7 (10...Bg6 11.Qb3=) 11.d5 ed5 (11...Nc5 12.de6 fe6 13.Nd4=) 12.ed5+= c5?? (better 12...Qc7+=) 13.Re1+- Be7 (13...Ne7 14.Bb5 f6+-) 14.Bg7 (14.Bg7 Qc7 15.Bh8+-) 1-0. OnlyPolishOpening (2085) - nikolay_ar (2080), lichess.org, 2020.

4.Bb2 Bb4 5.c3 Be7 6.Nbd2 Nf6 7.e4 de4 8.de4 Ne4 9.Qa4 Qd7 10.Bb5 c6 11.Be2 Nc5 12.Qd1 Nd3 13.Bd3 Bd3 14.Ne5 Qd5 15.Ndf3 Qe4 16.Kd2 Ba6 17.Re1 Qd5 18.Kc2 Qd1 19.Rad1 0-0 20.Re4 b6 21.c4 Bb7 22.Rg4 f6 23.Nd3 c5 24.Nf4 Kf7 25.Nh5 g6 26.Ng3 Nc6 27.Rf4 Nb4 28.Kb3 Bf3 29.gf3 f5 30.h4 Rfd8 0–1. Boava,Diego – Umetsubo,Otavio, (year?).

4.Bb2 Nf6 5.a3 Be7 6.g3 h6 7.Bg2 0-0 8.0-0 c5 9.c3 cb4 10.cb4 a6 11.Nbd2 b5 12.Nb3 Nbd7 13.Na5 Rc8 14.Ne5 Ne5 15.Be5 Nd7 16.Rc1?? (better is 16.Bb2=) 16...Ne5–+ 17.Rc8 Qc8 18.Qd2 Bd8 19.Rc1 Qd7 20.Nb3 Bb6 21.Nc5 Bc5 22.Rc5 Rc8 23.Qc2 Rc5 24.Qc5 Qc6 25.Qa7?? Nd7 26.Bf1 Kh7 27.f3 Qc1 28.Kf2 Ne5 29.Qa6 d4 30.Qb5 Qe3 31.Kg2 f6 32.a4? Qc1 33.Qc5 Qa1 34.a5 Bh3!! 35.Kf2 Qf1# 0–1. giorgo – filemonis, kurnik, 2012.

4.c3 Nf6 +=.

4.a3 Nd7 5.e3 Ngf6 6.Bd3 Ne4 7.Bb2 Bd6 8.0-0 Qf6 9.c4 c6 10.c5 Bc7 11.Qc2 Qh6 12.Nbd2 Nd2 13.Qd2 Be4 14.Be4 de4 15.Ne5 f6 16.Ng4 Qh4 17.h3 h5 18.Nh2 g5 19.f4 (19.Qe1 g4+=) 19...gf4–/+ 20.ef4 Rg8 21.Qe1 Qh3 22.Qe4 0-0-0 23.Kh1 Qg3 24.Rad1 (better is 24.Rae1!?–/+) 24...f5–+ 25.Qf3 Bf4! 26.Qg3 (26.Qf4 Qg2#) 26...Bg3 (26...Rg3? 27.Rf4 Ne5 28.Rh4+– (worse is 28.de5 Rd1 29.Rf1 Rd2–/+)) 27.Nf3 Nf6 28.Ne5 Ne4 29.Kg1 (29.Nd3 h4–+) 29...h4 (better is 29...Be5!? 30.de5 Nd2 31.Bc1 Nf1 32.Rf1–+) 30.Rf3?? Be5 0–1. Orsatti,Marcello (1640) – Rizzardi,Franco (1885), Trieste op–B, 2004. (=1.Nf3 d5 2.b4 Bf5)

4.b5 Nf6 5.a3 c5 6.dc5 Bc5 7.e3 Nbd7 8.c4 0-0 9.Bb2 Ne4 10.h3 (10.cd5 Ndf6 11.Nfd2 Nd5 12.Ne4 Be4+=) 10...Bb6 11.a4 (better is 11.Nbd2!?+=) 11...Ba5–+ 12.Ke2 dc4 13.Qd4 Ndf6 14.Ne5?? (14.Qd8 Rfd8 15.Bd4–+) 14...c3! 15.Bc3 (15.Nc3 Qd4 Decoy; 15.Bc3 Nc3 Double attack) 15...Nc3 16.Nc3 Qd4 17.ed4 Bc3 18.Rd1 Rac8 19.a5 (19.g4 Bc2 20.Bg2 Nd5–+) 19...Ba5 20.Nf3 (20.g4 Rc2 21.Ke3 Nd5 22.Kf3 Rc3 23.Bd3–+) 20...Rc2 21.Nd2 Ne4 (21...Ne4 22.Ke3 Bd2 23.Rd2 Nd2–+) 0–1. Schindhelm,Thomas (2000) – Meincke,August_Wilhelm (2370), remoteschach.de, 2005.

4.Ne5? Bb4–/+ 5.Nd2 (5.c3 Bd6–/+) 5...Bc3–+ 6.Rb1 Bd4 7.Nef3 Bb6 8.Rb5 Nf6 9.Ne5 Qd6 10.e3 (10.Nef3–+) 10...Qe5 11.Nf3 (11.Bb2 Qd6–+) 11...Qc3 12.Bd2 Qc2 13.Rb6 (13.Qc2 Bc2 14.Bc3–+) 13...Qd1 14.Kd1 ab6 15.Be2 (15.a4 Ne4 16.Be1 Ke7–+) 15...Ra2 16.g3 (16.Rg1 Ne4 17.Be1 Ra1 18.Kc2 Nf2 19.Kb2 Rb1 20.Ka2 Rc1–+) 16...Ne4 17.Bc1 Nf2 (17...Nc3 18.Ke1 Re2 19.Kf1 Bh3 20.Kg1 Rc2 21.Bb2 Ne2) 18.Ke1 –+. madjack20 – ICCFmember, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 Bf5 3.d4 e6)

4.c4 e6 5.Bb2 Ngf6 6.b5 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.c4).

4.Bb2 Ngf6 5.d4 e6 6.a3 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Nbd7 6.d4).

4.a3 Nf6 5.Bb2 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

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

4.Bb2 Nf6 5.c4 Bb4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Bb4).

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

4.c4 e6 5.a3 Be7 (5...a5 6.b5=+) 6.d4 0-0 7.Bb2 (7.cd5 ed5 8.Bd3 Bd3 9.Qd3 Re8=) 7...c6 (7...a5 8.b5=+) 8.Nbd2 (8.c5 a5=+) 8...Nbd7 (8...a5 9.ba5 Qa5 10.Qb3=+) 9.Be2= a6 (9...a5 10.b5=) 10.Nh4 Bg6 (10...Be4 11.c5=) 11.Ng6+= hg6 (11...fg6 12.c5+=) 12.0-0 b5 (12...Qc7 13.Rc1+=) 13.c5 Qc7 14.a4 e5 (14...Rfb8 15.Ra3+=) 15.Ra3 (15.de5 Ne5 16.Bd4 Nc4+–) 15...e4 16.Qa1 (16.Qb3 Rfb8+–) 16...Rac8 (16...Rab8 17.ab5 ab5 18.f3+=) 17.ab5 ab5 18.Ra7 (18.Qa2 Qd8+–) 18...Qd8 19.Qa6 (19.Qa5 Qe8+–) 19...Rc7+= 20.Nb3 (20.Ra1 Ra7 21.Qa7 Kh7+=) 20...Nb8 21.Qb6 Ra7 22.Qa7 Qd7 (22...Kh7 23.Ra1+=) 23.Ra1 Rc8 (23...Kh7 24.Qd7 Nfd7 25.Ra7+–) 24.Bc3 (24.Qd7 Nbd7 25.Ra7 Bd8+–) 24...Kf8 (24...Qe6 25.Qb6+=) 25.Be1 (25.Nd2 Kg8+–) 25...Bd8+= 26.Qd7 (26.Qa8 Bc7+=) 26...Nfd7 (26...Nbd7 27.Ra6+=) 27.Ra7 Ke8 (27...Rc7 28.Ra8+–) 28.f3+– ef3 (28...Bg5 29.Kf2+–) 29.gf3 Bc7 30.e4 Nf6 31.Bd3 (31.e5 Nfd7+–) 31...Bf4 32.Bg3 g5 33.Bf4 (33.Kf2 de4 34.fe4 Ng4 35.Kg2 Rd8+–) 33...gf4 34.Na5 (34.h4 Kf8+–) 34...Kf8 35.e5 (35.Ra8 Re8+–) 35...Ne8?? (better 35...Nfd7+–) 36.Bf5+– (36.Bf5 Rc7 37.Ra8+–) 1–0, Emperado,Emmanuel (2230) – Arroyo,Christian (2210), Philippine Open, 2016.

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

4.c4 e6 5.b5 c6 6.a4 Bd6 7.Qb3 0-0 8.Bb2 Nbd7 9.d4 dc4 10.Bc4 Rc8 11.Nbd2 Nb6 12.0-0 Nc4 13.Nc4 Bb8 14.Rfc1 Qd5 15.Ba3 Rfd8 (15...Rfe8 16.b6 a6 17.Na5=) 16.b6 a6 (16...ab6 17.Be7 b5 18.ab5= (worse is 18.Bd8 bc4 19.Qb7 Rd8–/+)) 17.Ncd2 (17.Be7 Rd7 18.Bf6 gf6+=) 17...Qd7 18.Qc4 Ne4 19.Ne4 Be4 20.Nd2 Bd5 21.Qc3 e5 22.de5 Bg2 23.Kg2 Qd2 24.Bb2 Qd5 25.Kg1 Qe6 26.f4 Rd5 27.Rd1?? Qg4 28.Kf2 Rd1 29.Rd1 Qd1 30.e6 Qg4 31.ef7 Kf7 32.Qc4 Qe6 33.Qd4 Rg8 34.Kf3 Qd5 (34...Qd5 35.Qd5 cd5–+) 0–1. Palmi,Herbert (1945) – Heimann,Helmut (1960), Regionalliga SO, 2003.

4.c4 e6 5.Nh4 Bg6 (5...Bg4 6.Qa4 Nc6 7.cd5 Nd5 8.Ba6+=) 6.Be2 (6.Ng6 hg6 7.b5 Nbd7+=) 6...Bb4–/+ 7.Qb3 (7.a3 Bd6–/+) 7...Nc6 8.a3 Bb1 (8...dc4!? 9.Qc4 Ba5–/+) 9.Rb1= dc4 (9...Ne4 10.Nf3 Be7 11.Qb7=) 10.Bc4 (10.Qc4!? Be7 11.Rb7+=) 10...Bd6 (10...Nd7!? 11.Nf3 Bd6=) 11.Qb7+= Ne5 (11...Na5 12.Bb5 Kf8 13.Qa6=) 12.Bb5+/– Ned7 13.Bb2 (better is 13.Bc6!? Rc8 14.Qa7+/–) 13...0-0= 14.Qf3 (14.Bf6 Nf6 15.0-0 Ba3=) 14...Ne5 (14...Rb8!? 15.a4 g5+=) 15.Qe2 Rb8 (15...c6 16.f4 Ne4 A) 17.fe5? A1) 17...cb5 18.Qg4 (18.ed6?? Qh4 19.g3 Ng3 20.hg3 Qh1 21.Qf1 Qd5–+) 18...f5 19.ef6 Bg3 20.Ke2 (20.hg3?? Qd2 21.Kf1 Qf2) 20...Qd2 21.Kf3 Nf6 22.Qe6 Rf7 23.Kg3–+ (worse is 23.hg3 Re8 24.Rhd1 Re6 25.Rd2 Ne4 26.Kg4 Nd2–+); A2) 17...Qh4 18.g3 Ng3 19.hg3 Qh1 20.Qf1 Qf1 21.Bf1 Be7–+; B) 17.0-0 cb5 18.fe5=) 16.Be5 (16.f4!? Ned7 17.0-0+/–) 16...Be5= 17.0-0 Ne4 18.Bd3 (18.Nf3 Qd6+=) 18...Rb1 (18...Bh2!? 19.Kh2 Qh4 20.Kg1 Nf6 21.Rb8 Rb8–/+) 19.Rb1+= Nc5 (better is 19...Bh2!? 20.Kh2 Qh4 21.Kg1 Nd6=) 20.Bh7+= Kh7 21.Qh5 Kg8 22.Qe5 Qd3 23.Rc1 (better is 23.Rf1!? Ne4 24.Nf3+=) 23...Nb3= 24.Rd1 (24.Re1 Nd2 25.Qc7 Qa3=) 24...Qe2 25.Rb1 Nd2 26.Qb2? (26.Qb5!? Qg4 27.Qb4 Qb4 28.Rb4+=) 26...Rd8 (better is 26...c5 27.Nf3 Nf3 28.gf3 Qf3–+) 27.Nf3?? (better is 27.Qb5 Rd3 28.Qe8 Kh7 29.Qf7+=) 27...Nf3–+ 28.gf3 Rd1 (28...Qf3?! 29.Qc2 c6 30.Qa4–+) 29.Rd1 Qb2 (29...Qd1?! 30.Kg2 Kh7 31.Qb7=) 0–1. queensservant (1755) – takefiree (1700), gameknot.com, 2013.

4.Be2 e6 5.a3 h6 6.0-0 Be7 7.Bb2 0-0 8.d4 a5 9.b5 Nbd7 10.Nbd2 c6 11.Rc1 Ne4 12.Ne4 Be4 13.Nd2 Bg6 14.c4 cb5 15.cd5 b4 16.ab4 ed5 17.ba5 Qa5 18.Bc3 Qb6 19.Bf3 Ba3 20.Ra1 Rfc8 21.Nb1 Nf6 22.Na3 Rc3 23.Nc4 Qd8 24.Ne5 Bf5 25.Ra8 Qa8 26.Qa1 Qc8 27.h4 Ne4 28.Qa5 Rc1 29.Rc1 Qc1 30.Kh2 Nf2 31.Qd5 Be6 32.Qb7 Qe3 33.Qb8 Kh7 34.Nc6 Bg4 35.Qe5 Bf3 36.Qf5 Kg8 37.Qc8 Kh7 38.Qf5 Kg8 39.Qf3 Qf3 40.gf3 Kf8 41.Kg3 Nd3 42.Kg4 g6 43.f4 h5 44.Kf3 Ne1 45.Kf2 Nc2 46.Ke2 Na3 47.Kd3 Ke8 48.Ke4 Nc4 49.d5 f6 50.Kd4 Nd6 51.Kc5 Ne4 52.Kd4 Nd6 53.Nb8 Nb7 54.Na6 Ke7 55.Nc5 Nd6 56.Ne4 Nb7 57.Kc4 f5 58.Nd2 Kf6 59.Kd4 Nd6 60.Kc5 Ne4 61.Ne4 fe4 62.Kd4 Kf5 63.Ke3 g5 64.fg5 Ke5 65.g6 1–0. Pal – Bombek, Slovakia 1995.

3.a3 b5 4.e3 a6 5.Be2 g5 (5...e5 6.0-0=) 6.0-0 e5 7.d3 c5 8.c3 c4 (8...Nc6 9.a4 Bf5 10.bc5 Bc5 11.d4+/–) 9.d4 e4 10.Nfd2 g4 (10...Qc7!?+=) 11.a4 ba4 12.Ra4 (12.Bg4 Bg4 13.Qg4 Qd7 14.Qh5 Qf7+/–) 12...Bd7 (better is 12...h5+=) 13.Re1?? (better is 13.Ra5 Ne7 14.Bg4 Bg4 15.Qg4+/–) 13...Ba4–/+ 14.Nb3?? (better is 14.Qa4 Qd7 15.Qd7 Nd7 16.Bg4–/+) 14...Bb3–+ 15.Qd2 h5 16.g3 (16.Ba3 Bd6–+) 16...f5 17.Na3 h4 18.Bd1 a5 19.b5 a4 20.Qb2 hg3 21.fg3 Ra7 22.Bb3 cb3 23.Kg2 Rah7 24.Rh1 Rh3 25.c4 R8h4! 26.Bd2 Qg5 27.b6 Bd6 28.Nb5 Bg3! 29.Nd6 Bd6 30.c5 Rh2 31.Kg1 Rh1 32.Kg2 R4h2 0–1. pieeater – rgp, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 f6)

3.Bb2 b5 4.e4+= de4 5.Nh4 (worse is 5.Bb5 c6 6.Nh4 Be6+=) 5...g5? (better is 5...Nh6 6.Qh5 g6=) 6.Qh5+– Kd7 7.Ng6! Bg7?? (7...hg6 8.Qg4 Double attack (8.Qh8 Pinning; 8.Qh8 Deflection)) 8.Nh8 Bh8 (8...Nh6 9.Nf7 Qe8 10.Bb5 c6 11.Bc4+–) 9.Qh7 Nc6 10.Bb5 Bb7 11.Qh8 Kd6 12.Bc6 Bc6 13.h4 g4 14.Qh5 Bd7 (14...g3 15.fg3 e6 16.Qc5 Kd7 17.g4+–) 15.Qc5 Ke6 16.Qc4 Kf5 17.Nc3 Kg6 18.h5 Kg7 19.Qe4 Rb8 (19...e5 20.Qg6 Kh8 21.h6+–) 20.Qg6 Kf8 21.h6 Be8 22.Qg7 1–0. marekt – Pekin Dragons, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 f6)

3.Bb2 e5!? 4.a3 a5 +=.

3.b5 a6 4.e3 ab5 5.Bb5 c6 6.Be2 e5 7.d3 (7.0-0 Bd6=) 7...Be6 8.0-0 Bd6 9.c4 Ne7 10.Nc3 0-0 11.cd5 Nd5 12.Bb2 Nd7 13.Nd5 Bd5 14.a4 Nc5 15.Nd2 f5 16.Nc4 Bc4 17.dc4 Qc7 18.Qc2 f4 (18...e4 19.g3-/+) 19.ef4 ef4 20.Qc3 (20.Bd4 Ne6 21.Bc3 f3 22.Bf3 Bh2 23.Kh1 Rf3 24.gf3 Qf4-+) 20...Na4 21.Qb3 (21.Ra4!? Ra4 22.c5=+) 21...Nc5-/+ 22.Qc3 Rae8 23.Rfe1 (23.Bf3!?-/+) 23...Be5-+ 24.Qc2 Bb2 25.Qb2 Qe7 (25...f3 26.gf3 Re5 27.Qc3-+) 26.Kf1 (26.Qb4!?-/+) 26...Qh4 27.h3? (better 27.Kg1-+) 27…f3! (27...f3 28.Bf3 Nd3-+) 0-1. Darkseid (1845) - finnforce (2245), ChessWorld.net, 2010. (=1.Nf3 d5 2.b4 f6 3.b5 a6)

3.c3 e5 4.d4 ed4 (4...e4 5.Nfd2=+) 5.cd4 (5.Nd4!? a5 6.b5=) 5...Bb4=+ 6.Bd2 Nc6 7.Qa4 Qd6 8.a3 Bd2 9.Nbd2 a6 10.Qb3 Na5 (10...Rb8 11.e3=+) 11.Qe3 (11.Qa4!? Nc6 12.Qb3=) 11...Ne7=+ 12.Rg1 (12.Qc3 b6=+) 12...Be6 13.g4 Nc4 14.Qb3 b5 15.g5 f5 16.Rc1 (16.Qc3 0-0–/+) 16...Ng6 (16...Na3!? 17.Bg2–+) 17.Nc4 dc4 18.Qe3 0-0 19.h4 b4 (better is 19...Bd5–+) 20.ab4 Qb4 21.Nd2 a5?? (better is 21...Rfe8=+) 22.Qe6+– Kh8 23.Rc4 Qb6?! 24.Qe3 a4 25.h5 Nh4 26.Qc3 a3 27.Nb3 f4?? 28.d5 f3 29.Rc7 fe2 30.Qg7# 1–0. jimmyjazz – white_e_1, internet, 2007.

3.Nc3 Nc6 4.b5= d4 (4...Nb8 5.d4=) 5.bc6+= bc6? (better is 5...dc3 6.d4 bc6+=) 6.Na4 e5 7.c3 c5 (7...Bf5 8.cd4 ed4 9.Bb2+–) 8.Qc2 Be6 (8...Bb7 9.Rb1 Qd5 10.e3+–) 9.Ba3 Qd5 10.cd4 cd4 11.Bf8 Kf8 12.e4 de3 13.fe3 Rd8 14.Be2 c6 15.Nc5 Bf7 16.e4 Bg6 17.Rc1 Qf7 18.Bc4 Rd5 19.Qb2 Qe7 20.Bd5 cd5 21.Qb8 Be8 22.ed5 Kf7 23.0-0 Kg6 24.d6 Qf7 25.Ne5! fe5 26.Rf7 Kf7 27.Qa7 (27...Kg6 28.d7 Bd7 29.Qd7+–) 1–0. jaskier (2170) – klim_bes, internet, 2007.

3.Nc3 e5!? =+.

3.Nc3 e6 4.b5 (4.a3 e5=) 4...a6 (4...d4 5.Ne4=) 5.e3 Bd7 (5...Bb4 6.Bb2=) 6.g4 (6.ba6 Na6 7.Rb1 b6=) 6...h5 (6...ab5 7.Nb5 c6–/+) 7.a4 (7.ba6!? Na6 8.gh5 Rh5 9.Rb1=) 7...ab5 (7...hg4 8.Ng1–/+) 8.Rg1 (8.Bb5!? Bb4 9.Na2+=) 8...hg4 9.ab5?? (better is 9.Rg4 ba4 10.Ba3–+) 9...Ra1 10.Nd4 (10.Rg4 e5 11.Rh4 Rh4 12.Nh4 Ba3 13.Ba3 Rd1 14.Kd1 d4–+) 10...Bb4 (better is 10...f5!? 11.Nb3 Ra8 12.Rh1–+) 11.Nb3 Ra7 (11...Bc3 12.dc3 Ra2 13.Rg4–+) 12.Rg4 (12.Qg4 Qe7 13.Qg7 Qg7 14.Rg7 Ne7–+) 12...Rh2 (better is 12...Qe7–+) 13.Rb4 Rh1 (13...Qe7 14.Qg4 g5 15.b6 cb6 16.Qg3–/+) 14.Qf3 Rf1 (better is 14...Rh6–+) 15.Kf1–/+ Qe7 (15...Nh6 16.Qh5 Ke7 17.Ke1+=) 16.Rg4 (16.Rh4 Nh6+=) 16...e5 (better is 16...Nh6 17.Rh4 Kd8+=) 17.Ra4? (17.Rh4 c6–/+) 17...Bb5 18.Nb5 Ra4 19.Qd5 Nh6 20.Qb7 Na6 (20...Nd7 21.Ba3 Qd8 22.Qc6=) 21.Nc3 (better is 21.Qc6 Qd7 22.Nc7 Nc7 23.Qd7 Kd7 24.Nc5 Kc6 25.Na4+/–) 21...Qe6?? (better is 21...Qd7=) 22.Nd4?? (better is 22.Qb5 Qd7 23.Qd7 Kd7 24.Na4+–) 22...Qc4 (22...Rd4 23.ed4 ed4 24.Ne2+=) 23.d3 Qc3 24.Ne2?? (24.Qc8 Kf7 25.Qd7 Kg6 26.Qa4–+) 24...Qc2–+ 25.Qb2 Nb4 (better is 25...Qd3!? 26.Qd2 Nb4 27.Kg2–+) 26.Nc3 (26.Qc2 Nc2 27.Bb2 g5–+) 26...Qd3 27.Kg2 Qg6 28.Kf1 Nd3 (better is 28...Ng4 29.f3 Qh7 30.fg4 Qh1 31.Ke2 Qg2 32.Kd1 Qf1 33.Kd2 Qd3 34.Ke1–+) 29.Qb1 (29.Qb5 Kf8 30.Na4–+) 29...Rg4 (better is 29...Qf5 30.Nd1 Qh3 31.Ke2 Nc1 32.Qc1 Ra2 33.Nb2 Qg4 34.Kd3–+) 30.Qb8 (30.Qb5 Kf8 31.Qb8 Qe8 32.Ba3 Kf7 33.Qc7 Kg6–+) 30...Kd7 31.Ba3 (31.Qb5 Kc8 32.Ba3–+) 31...Rg1 32.Ke2 Re1 (32...Nf4 33.ef4 Qc2 34.Ke3 Nf5 35.Kf3 Qd3) 33.Kd2–+ Ra1 (33...Qg1!? 34.Qb5 Ke6 35.Qd5 Kf5 36.Qd3 Kg5 37.f4 ef4 38.ef4 Kf4 39.Ne2 Re2 40.Ke2 Qg2 41.Ke1 Qe4 42.Kd2 Qd3 43.Kd3–+) 34.Qb5 Kc8 (better is 34...Ke6 35.Qb3 Kf5 36.e4 Kf4 37.Kd3 Qg2–+) 35.Be7?? (better is 35.Qa6 Kd8 36.Qa8 Kd7 37.Qd5 Kc8 38.Qa8 Kd7 39.Qd5 Kc8 40.Qa8 Kd7=) 35...Ng4 (35...Ne1 36.e4 Qg5 37.Ke2 Qg4 38.Kd2 Qf4 39.Ke2 Qf3 40.Kd2 Qf2 41.Ne2 Nf3 42.Kd3 Rd1 43.Kc2 Rd2 44.Kb3 Qe3 45.Nc3 Nd4 46.Kc4 Qd3 47.Kb4 Rb2 48.Ka4 Rb5 49.Bb4 Qc2 50.Ka3 Qb3) 36.Qd5 (36.Qd3 Qd3 37.Kd3 Nf2 38.Ke2 Ng4–+) 36...Ngf2 37.Qd8 (37.Qe6 Kb7 38.Qb3 Ka8 39.Qg8 Ka7–+) 37...Kb7 38.Qd5 Kc8 39.Qc4?? (39.Qd8 Kb7 40.Qd5 Ka7 41.Qc4 Rd1 42.Nd1 Ne4 43.Ke2 Qg2 44.Kd3 Qf1 45.Ke4 Qc4 46.Kf3 Qf1 47.Nf2 e4 48.Ke4 Qf2 49.Bf8–+) 39...Qg2 (39...Kd7 40.Bf8 Ne1 41.Qd5 Ke8 42.Qe6 Kf8 43.Qc8 Qe8 44.Qc7 Qe6 45.Qd8 Kf7–+) 40.Nd5 (40.Qg8 Kd7 41.Qc4 Ne4 42.Kd3 Qf1 43.Ne2 Rd1 44.Kc2 Rc1 45.Nc1 Qc4 46.Kb1 Ke7 47.Ne2 Nd2 48.Kb2 Qb3 49.Kc1 Nc4 50.e4 Qb2 51.Kd1 Qd2) 40...Rd1 (40...Ne4 41.Kd3 Rd1) 41.Kc2 (41.Kc3 Ne4 42.Kb3 Qb2 43.Ka4 Ra1 44.Qa2 Ra2 45.Ba3 Ra3) 41...Ne4 42.Kb3 Qb2 43.Ka4 Ra1 44.Ba3 (44.Qa2 Ra2 45.Ba3 Ra3) 44...Qa3 (44...Ra3) 45.Kb5 Rb1 (45...Qa6) 46.Kc6 (46.Qb4 Nd6 47.Kc6 Qa8 48.Qb7 Qb7) 46...Qa8 0–1. Souquiere,Florence – Melquiades,Jay, FICGS, 2006. (=1.Nf3 d5 2.b4 f6)

3.c4 e5 4.cd5 Qd5 5.Nc3 Qf7 6.e4 c6 (6...Nc6 7.Qa4 Bb4 8.Bb5 Bc3 9.Bc6 bc6 10.Qc6 Qd7 11.Qc3=) 7.b5 (7.a3 b5+=) 7...Bc5 8.d4 ed4 9.Nd4 Ne7 10.Qa4 Bd4 11.Qd4 0-0 12.a4 Be6 13.Be2 Nd7 14.0-0 f5 15.Ba3 Rfc8 (15...Rfe8 16.e5+=) 16.Rfe1 c5 (16...fe4 17.Ne4 Nf5 18.Qd2+=) 17.Qd6+/– a5 (17...fe4 18.Bh5 g6 19.Re4 gh5 20.Qe6 Qe6 21.Re6+/–) 18.Bf3 f4 (18...fe4 19.Re4 Nf8 20.Bg4+/–) 19.Rad1 (19.Nd5 Ng6 20.e5 Rd8+/–) 19...b6 (19...Re8!?+/–) 20.Nd5+– Ng6 21.Nb6 (21.e5 Rab8 22.Bh5 Bd5 23.Bg6 hg6 24.Rd5 Nf8+–) 21...Nb6+/– 22.Qb6 Ne5 23.Bh5 (23.Bc5? Nc4 24.Qe6 Qe6–+) 23...g6 24.Be2 Bc4 (24...f3 25.gf3 Bb3 26.Rc1+–) 25.Bb2 (25.Bc5 Be2 26.Qd6 Bd1 27.Rd1 Qb3 28.Qd5 Qd5 29.Rd5 Nd3 30.Rd3 Rc5–+) 25...Be2 26.Re2 (26.Be5?! Bd1 27.Rd1 Qe7+=) 26...Nc4 27.Qf6 Qf6 28.Bf6 Kf7 (28...Nb6 29.Rd6 Rab8 30.Ra2+–) 29.Bg5 (29…Nb6 30.Ra2+–; 29.e5 Nb6 30.Re4 c4 31.Rf4 Rab8+–) 1–0. Orsicz – Dziechciowski, corr, 1972.

3.d4 b5 4.e3 Bg4 5.Bb5 c6 6.Ba4 Bf3 (6...e5!? 7.de5 fe5+=) 7.Qf3+/– Qb6 8.a3 a5 (better is 8...e6+–) 9.Bb3?? (better is 9.Qd5! ab4 10.Qb3 e5+–) 9...e6 (9...ab4 10.Qf5+=) 10.Bb2 (10.ba5!? Ra5 11.Nd2+/–) 10...ab4+= 11.a4 c5 12.e4 (12.0-0 Nc6 13.dc5 Bc5 14.Qh5 g6+=) 12...cd4 (better is 12...c4!? 13.a5 Ra5 14.Ba4 Kd8 15.ed5 c3–/+) 13.ed5 Ne7? (13...e5 14.0-0+=) 14.d6 Qc6?? (14...Qd6 15.Qa8 Discovered attack) 15.de7+– Ke7 16.Qc6 (better is 16.Qg3!? e5+–) 16...Nc6 17.0-0 e5 18.Re1 Na5? (18...Kd6 19.Nd2+–) 19.Nd2 (better is 19.Bd4 Kd6 20.Be3+–) 19...Kd6 20.Rad1 f5? 21.Nc4 Nc4 22.Bc4 Rc8 23.Bb3 Kc5 24.Re5 Kc6 25.Bd4 Bd6 26.Rb5 Rb8 27.Bd5 Kd7 28.Ra5 Rhc8 29.Bb3 g6 30.Be5 Rc6 31.Ra7 Kc8 32.Be6 Kd8 33.Bd6 Rc2 34.Bb8 1–0. Eagle22 – Roc, playchess.de, 2006.

3.d4 e6 4.a3 a5 5.b5 c5 6.bc6 bc6 7.e3+= Nh6 8.Bd3 Nf7 9.0-0 (9.e4 de4 10.Be4 g5+= 0.43 (10...e5+=)) 9...f5 (9...e5 10.de5 fe5 11.e4=; 9...Ba6 10.Nc3 Bd6) 10.c4+= Bd6 (10...Be7+/–) 11.cd5 (11.Nbd2 0-0+=) 11...ed5 (11...cd5 12.Nc3+=) 12.Qc2 Qf6 13.Nc3 Ba6 14.Ba6 Ra6 15.Na4 0-0 16.Rb1 g5 (16...Nd7 17.Rb7 Qe6 18.Bd2+=) 17.Bb2 (17.Nc5!? Ra7 18.Nb7+=) 17...g4+= 18.Ne5 (18.Nd2 Qh6 19.g3 Ng5+=) 18...Ne5= 19.de5 Be5 20.Be5 Qe5 21.Nc5 Ra7= 22.g3 h5 23.Nd3 Qe4 24.Qc5 Raf7 25.Rfd1 h4 26.gh4 Rh7 27.Qd6 Qe7 28.Qe7 Re7 29.Rdc1 Kg7 30.Rb6 Rc8 31.Nc5 Kf6 32.Kg2 Ke5 33.a4 Rh7 34.h5 Kd6–/+ 35.Rbb1 Rh5 36.Nb7 Ke5 37.Na5 Rch8 38.Rh1 R5h6 39.Rbc1 Rc8 40.Rhd1 c5–/+ 41.Nb3 Nd7 42.a5 Ra6 43.Nd2 Nf6 44.f4 Kd6 45.Rc2 Rb8 46.Nc4 Ke6–+ 47.Ne5 Rb5 48.Rdc1 Ne4 49.h3 g3 50.Nf3–/+ Raa5 51.Ng5 Kf6 52.h4 c4 53.Ne4 fe4 54.Kg3 Ra3 55.Kf2 Rbb3 56.Re2+= c3 57.Rec2= Kg6 58.Kg3 Kf5 59.h5 Rb2 60.Kf2 Raa2 61.Rb2= Rb2 62.Kg3 Rb3 63.Rc2 Ra3 64.Kf2 Rb3 65.Rc1 d4+= 66.ed4 Kf4 67.h6 Rb2 68.Kg1 c2 69.Kf2 Rb6 70.Ke2 Rh6 71.Rf1 Kg5–/+ 72.Ke3 Re6 73.Re1 Kf5 74.Kd2?? Kf4 75.Rf1= Kg3 76.d5 e3 77.Kc1?? Rd6 78.Rf5 e2 79.Re5 Kf2 80.Rf5 Ke3 81.Re5 Kd3 (81...Kd3 82.Re2 Ke2 83.Kc2 Ke3–+) 0–1. Ivanets,Vladimir (2290) – Laco,Giuseppe (2100), Wch–Seniors, Lignano Sabbiadoro ITA, 2005.

4.e4 b5 5.a4 c6 6.Nc3 (6.d3 e5 7.Bd2 cd3 8.ab5 f5=+) 6...Ba6 (6...Qd7 7.ab5 cb5 8.d3=+) 7.d4 e6 8.Ba3 Ne7 9.h4 (9.Be2 Ng6=) 9...Qd7=+ 10.Qd2 (10.h5 Bb7=+) 10...Bb7 11.Be2 Nc8 12.a5 Na6 13.Rb1 Nd6 14.e5 Nf7 15.ef6 gf6 16.Ne4 Bg7 17.h5 Rg8 (18.Qc3 0-0-0–/+) 0–1. Karayel,Atagun – Buss,Michael, corr or02–023, 2002.

4.e4 b5 5.Nc3 c6 6.a4 e5 7.ab5 Bb4 (7...Be6 8.Qa4 Ne7 9.Bb2+–) 8.Bc4 (8.Qa4 Bc3 9.dc3 cb5 10.Qb5 Qd7 11.Qc4 Ne7+–) 8...Bc3 9.dc3 Qd1 10.Kd1 Bb7 11.Be3 a6? (better 11...Nd7 12.Nd2 Ne7+–) 12.ba6+– Na6 13.Kc2 Ne7 (13...Nc7 14.Ra8 Ba8 15.Ra1+–) 14.Rhb1 Bc8 15.Ne1 (15.Bc5 Rf8+–) 15...f5? (better 15...Nc7+–) 16.f3 f4 (16...Rf8 17.Nd3+–) 17.Bf2 g5 (17...Rf8 18.Nd3+–) 18.Nd3 Kf8 (18...h5 19.Ne5 Rh6 20.Ra5+–) 19.Ne5 h6 (19...Kg7 20.Ra5 Rd8+–) 20.Bc5! Nc5 (20...Rh7 21.Nc6 Ke8 22.Be7 Re7 23.Ne7 Ke7 24.Ra5+–) 21.Ra8 Kg7 22.Ra7 Kf6 23.Re7! Ke7 24.Ng6 Kf6 25.Nh8 Ne6 (25...g4 26.Rd1 Nb7 27.Nf7+–) 26.Be6 Be6 27.Rb6 1–0. Bassini,Emile (1985) – Sych,Alina, 5th Basamro Int, 2017. (=1.Nf3 d5 2.b4 f6)

4.e3 e5 5.b5 Bf5 6.Bb2 d3 7.Nh4 Be6 8.Qb3 e4 9.Nc3 f5 10.Nd5 Nd7 11.Nf4 Qe7 (worse is 11...Qh4 12.Ne6 Kf7 13.c5+/–) 12.Ne6 Qe6 13.c5 Nh6?? (13...Qb3 14.ab3 A) 14...Bc5 15.Bg7 Be7 16.Nf5+– (16.Bh8?! Bh4 17.g3 Bf6 18.Bf6 Ngf6+=); B) 14...Ne7+=) 14.Qe6+– (14.Qe6 Kd8 15.c6 bc6 16.bc6+–) 1–0. segovia – MrMartin58, ChessWorld.net, 2011.

4.e3 e5 5.ed4!? e4 6.Qe2 +=.

4.e3 e5 5.Ne5 fe5–/+ 6.Qh5 Ke7 7.Qe5 Kf7 0–1. Cirulis,Ilmars (1650) – Aahlad,Yeturu (1720), FICGS, 2014.

4.b5 a4 5.Ba3 e6 (5...Nh6 6.e3+=) 6.Bf8 Kf8 7.e3 Qd6 (7...c6 8.Nbd2+=) 8.c3 (8.c4 dc4 9.Bc4 e5+/–) 8...Nd7 (8...Bd7 9.Nbd2+=) 9.Bd3 (9.c4 Kf7+/–) 9...Ne7 (9...e5 10.e4+=) 10.Qc2 (10.c4 dc4 11.Bc4 Nb6+=) 10...Nb6 (10...e5 11.Be2 Kf7=) 11.Bh7 (better is 11.e4+/–) 11...f5+= 12.Ng5 g6 (12...g6 13.h4 Kg7+/–; better is 12...Nd7 13.e4 fe4 14.Be4 de4–/+) 0–1. Fischer,M – Husslein, corr SOK–87–16, 1987.

4.b5 c6 5.e3 Bd7 6.a4 e6 7.Ba3 Be7 8.c4 cb5 9.cb5 Ba3 10.Ra3 Ne7 11.Bd3 Nc8 12.Qc2 f5 13.Ne5 0-0 14.0-0 Nd6 15.Rc1 Nf7 16.Nf7 (16.Nd7?! Nd7 17.Rc3 Nb6+=) 16...Rf7 17.Rc3 Rf8 18.Nd2 Ra7 19.Nf3 b6 20.Ne5 Rb7 21.f4 g5 22.Rc7 Rc7 23.Qc7 gf4 24.ef4 Qe7 (24...Qc7 25.Rc7 Bc8 26.Kf2+–) 25.Qb6 Qa3 26.Rc7 Bc8 (26...Re8+–) 27.Rc8 Rc8 28.Qe6 Kg7 29.Qc8 Qa1 30.Kf2 Qd4 31.Kf3 Qa4 32.Qf5 (32.Qc7 Kh6 33.Qd6 Kh5 34.Qf6 Qd1 35.Be2 Qe2 36.Ke2 h6 37.Qf5 Kh4 38.g3) 32...Qd1+– 33.Kg3 Qe1 34.Kh3 (34.Kh3 Qe3 35.g3 Qg3 36.Kg3 h5 37.Qg6 Kf8 38.Qf7) 1–0. Elkin,Alexander (2195) – Samborskiy,Vadim (2050), Ulyanovsk RUS, Sidorov Mem, 2013. (=1.Nf3 d5 2.b4 f6)

4.b5 Bg4 5.h3 Bf3 6.ef3 =.

4.a3 Nd7 5.de5 Ne5 6.Ne5 fe5 7.e4 =.

4.a3 e4 5.Nfd2 Bd6 6.e3 f5 7.c4 c6 8.Nc3 Nf6 9.Qb3 Be6 10.cd5 cd5=+ 11.Be2 Nbd7 (11...0-0 12.Bb2=+) 12.a4 (12.Bb2 0-0=) 12...Rc8 13.a5 (13.g3 0-0=+) 13...Bh2 (13...0-0 14.a6 ba6 15.Ra6=+) 14.g3 (14.a6 b6 15.g3 Bg3 16.fg3 Qc7=+) 14...Bg3=+ 15.fg3 Qc7 16.Nd1 (16.a6 ba6 (worse 16...Qc3 17.ab7 Rc7 18.Qc3 Rc3 19.Bb2+=; 16...Qg3?! 17.Kd1 b6 18.Nf1=) 17.Bb2 Qg3 18.Kd1 0-0=+) 16...Qg3 17.Nf2 Ng4 (better 17...h5!?=) 18.Bg4+– fg4 19.Nde4! Qg2 (19...de4 20.Qe6 Double attack (20.Qe6 Pinning; 20.Qe6 Deflection)) 20.Nd6 Kd8 21.e4 (21.Rf1 g3 22.Nc8–/+; 21.Rf1 g3 22.e4 gf2 23.Rf2 Qh1 24.Kd2 Qh4–/+) 21...g3=+ Threatening mate... how? 22.Bg5 (22.Nb7 Ke7 23.Rf1 gf2 24.Rf2 Qh1 25.Rf1 Qe4 26.Be3 Rhf8 27.Rf8 Kf8–+ (27...Rf8?! 28.0-0-0–/+)) 22...Nf6 23.Bf6 (23.Nb7 Ke7 24.Rf1 gf2 25.Rf2 Qg5–+) 23...gf6 24.Rf1 (24.Nb7 Ke7 25.Rf1 gf2 26.Kd2 Qg5 27.Qe3 Rc2 28.Kc2 Qe3–+) 24...gf2 (24...Rc7 25.Qe3 gf2 26.Kd2 de4 27.Rf2–/+) 25.Rf2=+ Qh1 26.Rf1 Qh4 27.Rf2 (27.Kd2 Qh2 28.Ke1 Qd6 29.a6 de4 30.Qa3 ba6 31.Rb1–+) 27...Qh1 (better 27...Rg8 28.Qf3 Rg1 29.Kd2 Ra1 30.Qf6 Qf6 31.Rf6 Ra2 32.Ke3 Rc3 33.Kf4 Rf2 34.Ke5 Rf6 35.Kf6 de4 36.Ne4 Re3–+) 28.Rf1= Qh4 29.Rf2 Rg8 30.Ke2 (30.Qf3 Rg1 31.Kd2 Qg5 32.Qf4 Ra1 33.Qg5 fg5 34.Nc8 Ra2 (worse 34...Bc8 35.Rf8 Kc7 36.Rf7 Kc6 37.ed5 Kd5 38.Rc7–+) 35.Ke3 Rf2 (35...Kc8 36.Ra2 de4 37.Rf2+–) 36.Kf2 Kc8 37.ed5 Bd5–+; 30.Qf3 Rg1 31.Kd2 Qg5 32.Qf4 Ra1 33.Qg5 fg5 34.Rf8 Ke7 35.Rc8 de4 36.Rc5 Kd6 37.Rg5–+) 30...Bg4 (30...Qh5 31.Kd2 Qh6 32.Qe3 Rc2 33.Kc2 Qe3 34.Rh2 Qd4 35.Nb7 Kc7 36.Rah1 Qe4 37.Kc1–+; better 30...Rg3 31.Nb7 Ke7 32.Qg3 Qg3–+) 31.Ke1 Be6 (31...Bh3 32.Ke2 Qh5 33.Kd2 Qh6 34.Qe3 Rc2 35.Kc2 Qe3 36.Rd1 Qf2 37.Rd2–+; better 31...Bd7 32.Qf3 Rg1 33.Kd2 Ra1 34.Qf6 Qf6 35.Rf6 Ra2 36.Kd3 Rc1–+) 32.Ke2 (32.Nb7?? Ke7 33.Ke2 Qe4 34.Kf1 Bd7–+; 32.Nb7 Ke7 33.Qf3 Rc2 34.Qf6 Qf6 35.Rd2 Qd4 36.Rad1 Rg1 37.Ke2 Bg4) 32...Rg3 33.Qa4 (33.Qg3 Qg3 34.Nc8 de4 35.Nd6 Bg4 36.Kf1 Bh3 37.Ke2 Qd3 38.Ke1 Qe3 39.Re2 Qc3 40.Rd2–+; 33.Qg3 Qg3 34.Nc8 de4 35.Nd6 Qd3 36.Ke1 Qc3 37.Ke2 Bg4 38.Kf1 Qa1 39.Kg2 Bf3 40.Rf3 ef3 41.Kf3 Qh1 42.Kg4–+) 33...Bg4 34.Kd2 (34.Rf3 Qh2 35.Ke1 Rg1 36.Rf1 Qe2) 34…Qh6 (34...Qh6 35.Ke1 Rg1 36.Rf1 Qe3; 34...Qh6 35.Rf4 Qf4 36.Ke1 Rg1) 0–1. Santasiere,Anthony – Levy, New York, 1941. (=1.Nf3 d5 2.b4 f6 3.d4 e5)

4.a3 e4 5.Nfd2 f5 6.c4 Nf6 7.c5 (7.Nc3!?=) 7...f4+= 8.Nb3 e3 9.fe3 fe3 (9...Ne4 10.ef4 Qh4 11.g3 Ng3 12.hg3 Qh1 13.Nc3+=) 10.Be3= Be7 11.N1d2 (11.Bf4 Bg4=) 11...Ng4+= 12.Bg1 0-0 13.Nf3 (13.e4 Bg5+=) 13...Bg5 (13...Qe8 14.g3–/+) 14.Ng5+= Qg5 15.Qd2? (better is 15.Qd3+=) 15...Qh4–+ 16.g3 Rf1! 17.Kf1 Qh3 18.Ke1 Qg2 19.Qg5? (19.Qf4 Qh1 20.Kd2 c6–+) 19...Nc6 (better is 19...Nf6–+) 20.b5 h6 21.Qf4? (better is 21.Qg6 Nf6 22.bc6–+) 21...Qh1–+ 22.bc6 (22.Kd2 Nd8–+) 22...Qg1 23.Kd2 Qf2 24.Qf2 (24.cb7 Qf4 25.gf4 Bb7–+) 24...Nf2 25.cb7 Bb7 26.Na5 (26.Rb1 Ba6–+) 26...Ba6 27.Nc6 (27.Rf1 Ne4 28.Kc2 Re8–+) 27...Re8 28.Re1 (28.e3 Ng4 29.Rh1 Re3–+) 28...Ne4 29.Kc2 Nf6 (29...Bb5 30.Nb4 c6 31.Nd3–+) 30.Kd2 (30.a4 Ng4 31.h3 Ne3 32.Kc3 Ng2–+) 30...Re6 31.Nb4 (31.Na7 Ne4 32.Kc2 Ng5–+) 31...Bc4 32.e3 (32.Nd3 Bd3 33.Kd3 Ng4–+) 32...Ne4 33.Kc1 Rf6 (33...Rf6 34.Rh1 Rf2–+) 0–1. Chandler,Patrick (2265) – Krenz,Valeriy (2285), Bad Vilbel Germany, Open, 2010. (=1.Nf3 d5 2.b4 f6 3.d4 e5)

4.a3 e4 5.Nfd2 f5 6.e3 Nf6 7.c4 c6 8.Qb3 Bd6 9.Nc3 Be6 10.a4 a6 11.cd5 cd5 12.b5 0-0 13.Ba3 Ba3 14.Qa3 f4 15.Be2 (15.ef4!? Qc7 16.Rc1=) 15...fe3=+ 16.fe3 Ng4 (16...ab5 17.Nb5 Ng4 18.Qb3=+) 17.Bg4= Qh4 (17...Bg4 18.Qb3 ab5 19.Qb5 Ra5 20.Qb7 Qh4 21.g3 Qg5–/+) 18.Kd1?? (better 18.g3 Qg4 19.Qd6+–) 18...Qg4–+ 19.Kc2 (19.Ne2 Rf2 (worse 19...Qg2 20.Rg1 Qh2 21.Qe7=+) 20.Re1 Nd7 (20...Qg2?! 21.Rg1 Qh3 22.Qe7=) 21.ba6 ba6–/+) 19...ab5 20.h3 (20.Qd6 Ra6 21.Qg3 Qg3 22.hg3 b4–+) 20...Qg5 (20...Qg2 21.Rag1 Qf2 22.Rf1=+) 21.Nb5 Rc8 (21...Qg2?! 22.Rag1 Qf2 23.Nc7=+) 22.Kb2 Bd7 (22...Qg2 23.Rad1 Nd7 24.Qd6–+) 23.Rhc1 (23.Qb3 Bb5 (23...Qg2?! 24.Qd5 Kh8 25.Rad1=+) 24.ab5 Nd7–/+) 23...Qg2 (23...Rc1!? 24.Rc1 Qg2 25.Qe7–+) 24.Rc8 Bc8 25.Qc3? (25.Kc2 Qh3 26.Rf1=+) 25...Na6 (25...Qh3 26.Nc7 Ra6 27.Na6 Na6 28.Qa5=; 25...Bh3?! 26.Nc7 Ra7 27.Nd5–/+) 26.Nd6 Bh3 27.Ka3 Qg3 (27...Qg4 28.Nb7 Qd7 29.Rb1–+) 28.Nb7 (28.N2e4!? Qf3 (28...de4?? 29.Qb3 Kh8 30.Nf7 Kg8 31.Nh6 Kh8 32.Qg8 Rg8 33.Nf7) 29.Qb3 Be6–+) 28...Rc8 (28...Nc7 29.Qb3 Kh8 30.Rc1–+) 29.Nc5 Qd6 (29...Nc5 30.dc5 Be6 31.Qd4–+) 30.Ndb3 (30.Nde4!? Qe7 31.Rb1–/+) 30...Rb8 31.Qa5 (31.Kb2 Bg4–+) 31...Nb4 32.Kb2? (32.Qb4 Rb4 33.Kb4 Qb8 34.Ka3–+) 32...Qh2 33.Ka3 Nc2 34.Kb2 (34.Ka2 Na1 35.Ka1 Qg1 36.Ka2 Qe3 37.Qc7 Qe2 38.Ka3–+) 34…Ne3 (34...Ne3 35.Qd2 Qd2 36.Ka3 Nc4) 0–1. Santasiere,Anthony – Lasker,Edward, Cazenovia, 1942. (=1.Nf3 d5 2.b4 f6 3.d4 e5)

4.b5 Bd6 5.de5 fe5 6.Bb2 Qe7 7.e3 (7.Qd5!? Nf6 8.Qb3=) 7...Nf6 8.c4 c6 9.c5 (9.cd5 cd5 10.Be2 Nbd7=) 9...Bc7=+ 10.Qa4 (10.Nbd2 e4 11.Nd4 Qc5–/+) 10...e4 (10...Ne4 11.Ba3–/+) 11.b6=+ Nbd7 12.bc7 ef3 13.gf3 Nc5 (13...Qc5?! 14.Ba3 Qb6 15.Qb4 Qb4 16.Bb4=) 14.Qh4 Bf5 (14...Qc7 15.Bf6 gf6 16.Qf6=+) 15.Rg1 0-0 (worse 15...Qc7 16.Bf6 gf6 17.Qh5 Bg6 18.Rg6+–) 16.Qg5 Bg6 (16...Bg6 17.Qe5 Qf7–/+) 0–1. Karker,Norbert – Cvachoucek,Frantisek, corr ICCF EU–ch M, 1967.

4.b5 e4 5.Nfd2=.

4.Nc3? e4–/+ 5.Nh4 Bb4 6.Kd2 (6.Bd2 Bc3 7.Bc3 g5–+) 6...Bc3 (6...g5 7.Rb1 Ba5 8.e3 gh4 9.Qh5 Ke7 10.Ba3 Ke6 11.Be2–+) 7.Kc3 c6 (7...g5 8.e3 gh4 9.Qh5 Ke7 10.Ba3 Ke6 11.Qg4 Kf7 12.Qh5 Kg7 13.Qh4–+) 8.Rb1? (better is 8.e3 Qa5 9.Kb3–+) 8...Qa5 9.Kb3 (9.Kb2 g5 10.Bd2–+) 9...Qb5 10.Kc3 Qb1 (11.g3 Qa2–+) 0–1. SciSysMk10 Hasler – Apel, 1990.

5.c3 Bc5 6.e3 Ne7 (6...fe5!? 7.Ne5 Nf6+=) 7.ef6+= gf6 8.Ba3 Ba3 9.Na3 c6 10.Nd4 Qa5 11.Nb1 Ng6 12.Be2 Qc7 13.Nd2 a6 (13...Rg8 14.0-0+=) 14.0-0 Bd7 (14...Rg8 15.c4+=) 15.Bd3 Qe5 (15...Ne5 16.Qh5 Kd8 17.Qh6+/– (17.Bh7? Bc8–+)) 16.Qb1 b5 17.Bg6 hg6 18.Qg6 Kf8 19.N2f3 Qe7 20.Rad1 Be8 21.Qd3 Bh5 (21...Qe4 22.Qe4 de4 23.Ne6 Ke7 24.Nfd4+/–) 22.Qf5+– Bf3 23.Qc8 Qe8+/– 24.Qe8 Ke8 25.Nf3 Ra7 26.Rd2 Re7 27.Rfd1 Nd7 28.Nd4 Reh7 29.Nc6 Rh2 30.Kf1 Nb6 31.Nb4 Rg8 32.g3 Nc4 33.Rd5 Rh1 34.Ke2 Rd1 35.Rd1 a5 36.Nd5 Kf7 37.Nc7 Rb8 38.Rd5 b4 39.Kd3 Ne5 40.Kd4?? bc3 41.Rc5+/– Rb2 42.Ra5?? c2–+ 43.Rc5 Ra2 44.Nb5 Ra4 45.Kd5 Nd3 46.Nd6 Kg6 47.Rc8 c1Q (47...c1Q 48.Rc1 Nc1–+; better is 47...Ra5 48.Kd4 Nc5 49.Rc5 Rc5 50.Kc5 c1Q 51.Nc4 Qe1–+) 0–1. Ziolkowski,T (1800) – Lowinski,J, corr, 1996.

5.c3 Bc5 6.e4 c6 (6...de4 7.Qa4 Nd7 8.Nd4–/+) 7.Nd4 (7.ed5!? Qd5 8.Qd5 cd5 9.Ba3=) 7...Qe7 8.ed5 Qe5 9.Be2 Ne7 (9...Qd5 10.0-0=+) 10.dc6= Nbc6 11.Be3 0-0 12.0-0 Na5 (12...Rd8 13.Qb3 Nd5 14.Nf3+–) 13.Nd2 (13.Nf3 Qc7=) 13...Nd5 14.Nc4 Ne3 (14...Nc3 15.Qd3 (worse 15.Ne5 Nd1 16.Rad1 fe5=+) 15...Bd4 16.Ne5 Ne2 17.Qe2 Ba1 18.Nc4+– (18.Ra1?! fe5 19.Bc5 Re8+–)) 15.fe3 Nc4 16.Bc4 Kh8 17.Qd3 Bd7 18.Rf3 Rae8 Exerts pressure on the isolated pawn 19.Raf1 Bb6 20.Bb3 g6 21.Qc4 f5 22.g4 Bc6 23.Nc6 bc6 The pressure on the isolated pawn grows 24.gf5 Be3 25.Kh1 gf5 26.Qc6 f4 27.Rh3 Re7 (27...Rc8 28.Qb7 Qg7 29.Qg7 Kg7 30.c4=+) 28.Qd5 (28.Bd5 Rg7 29.Qe6 Qe6 30.Be6 Rb8=+) 28...Qd5=+ (28...Qc3?? 29.Rg1 Bg1 30.Rc3+–) 29.Bd5 Re5 30.c4 Rb8 31.Kg2 (31.Rh4!?=+) 31...Rb2–/+ 32.Kf3 Kg7 33.Kg4 Kg6 34.Re1?? (34.Bc6 Ra2 35.Rd1 Bd2–+) 34...Rg5 (better 34...h5 35.Rh5 Rh5–+) 35.Kf3–/+ h5 (35...Rf2 36.Ke4 Ra2 37.Rb1–/+) 36.Ke4? (36.Re2 Re2 37.Ke2 Rg1=+) 36...Bc5 (36...Ra2 37.Rf1–+) 37.Rf1? (better 37.Kf4!? Bd6 38.Ke3 Ra2 39.Be4 Kg7 40.Rf1=+) 37...Re2–+ 38.Kd3 Ra2 39.Ke4? (better 39.Be4 Kh6 40.Rh4–+) 39...Rd2 40.Rb3 Re2 41.Kd3 Rge5 Threatening mate... how? 42.Rf3 R5e3 (better 42...Rh2!? 43.Be4 Kg5 44.Rb8–+) 43.Re3 Re3 44.Kc2 Rb3 (44...Re2 45.Kd3 Rh2 46.Rb5 Rh3 47.Ke4–+) 45.Kb3 Kf5 46.Ka4 (46.Bf3 h4 47.Ka4 Ke5–+) 46...Kg4 47.Kb5 Bg1 48.c5 (48.Be6 Kh4 49.c5 f3–+) 48...Kh3 (48...Bh2 49.Bf3 Kf3 50.c6+=) 49.c6 Bb6 (49...Kh2?? 50.c7+–; 49...Bh2?? 50.c7 Kh4 51.c8Q+–) 50.Kc4 Kh2 (50...Kh2 51.Kd3 Kg3–+) 0–1. Zverjaka – Maksymenko, Ukraine, 1976. (=1.Nf3 d5 2.b4 f6 3.d4 e5 4.de5 Bb4)

5.c3 Bc5 6.Bf4 Nc6 7.e3 g5 8.Bg3 g4 9.Nd4 Ne5 10.Be2 h5 11.h3 Nh6 12.Nd2 Qe7 (12...gh3 13.gh3 h4 14.Bh4+=) 13.Bf4 Nhf7 14.Qc2 (14.hg4 Bg4 (14...Ng4?! 15.Bb5 Bd7 16.Nf5+=) 15.Qb3 0-0-0–/+) 14...gh3–/+ 15.gh3 Qd7 (15...Ng5 16.h4 Ne6 17.Bb5 Kd8 18.Bg3–/+) 16.Rd1 c6 17.e4 Bd4 18.cd4 Ng6 19.Be3 Ne7 20.Kf1 (20.Qb3 h4+=) 20...Qe6 21.Re1 Nd6 22.Bf4 Ne4 23.Ne4+= de4 24.Bc4 Qf5 25.Re4 Kd8 26.Bd3 Qd5 27.Bc4+= Qf5 28.Rg1?? Qh3–+ 29.Ke1 Bf5 30.Bd3 Be4 31.Be4 Qe6 32.Kf1 Rg8 33.Rg8 Qg8 34.Qc5 Qe6 35.Bf3 Kd7 36.Qh5 Rg8 37.Qa5 Qc4 38.Be2 Qd4 39.Qc7 Ke6 40.Bg3 Qa1 41.Kg2 Qe5 42.Bc4 Nd5 43.Qh7 Rg4 44.Kh2 Qf5 45.Qh8 Kf7 46.Be2 Rg5 47.Qb8 Qh7 48.Kg1 Qb1 49.Kh2 Qb2 50.Bf3 Ne7 51.Qc7 Rg3 52.Bh5? Rg6 53.Bg6 Kg6 54.Qe7 Qe5 (54...Qe5 55.Qe5 fe5–+) 0–1. Santasiere,Anthony – Fajans, New York, 1941. (=1.Nf3 d5 2.b4 f6 3.d4 e5)

5.Bd2 Bd2 6.Kd2? fe5 7.e3 e4–+.

5.Bd2 Bd2 6.Qd2 Nc6 7.ef6 Nf6 (worse 7...gf6 8.Nc3 Nge7 9.0-0-0+=) 8.Nc3 0-0 9.e3 Bg4 10.Be2 Qd7 11.Rd1 Will d5 fall? (11.Rb1 Rab8=) 11...Rad8=+ 12.h3. Jendrossek,Peter – Feilmayr, corr SOK–87–07, 1987.

5.Bd2 Bd2 6.Nbd2 Nc6 (6...fe5 7.Ne5 Nf6 8.g3=) 7.e3 (7.ef6!? Nf6 8.c3=) 7...fe5+= 8.Bb5 Qd6 (8...Qe7 9.c4 dc4 10.Bc6 bc6 11.Qa4=) 9.c4 Be6 (9...dc4 10.Qc2+=) 10.Qa4 Nge7 11.cd5 Bd5 (11...Nd5 Inferior is 12.Bc6 bc6 13.a3=) 12.e4 (12.Rb1 a6 13.Bc4 Rb8 14.Bd5 Qd5+=) 12...Be6 13.0-0 0-0 14.Nc4 Bc4 15.Qc4 Kh8 16.Rad1 Qf6 17.Bc6 Nc6 18.Rd7 Rac8 19.h3 h6 20.Nh2 Rfd8 21.Ng4 Qg5 (21...Rd7? is very tempting, but 22.Nf6 gf6 23.Qe6+–) 22.Rf7 (22.Rfd1 Rd7 23.Rd7 Qg6=) 22...Rd6 (22...Qg6 23.Rf5 Rd4 24.Ne5 Qf5 25.ef5 Rc4 26.Nc4+=) 23.f4 (23.Qb5 b6 24.Rf5 Qe7 25.Ne5 Ne5 26.Re5 Qd7=) 23...ef4+= 24.R1f4 Ne5 ½–½. Chandler,Patrick (2250) – Korentsvit,Valeriy (2225), Oberliga Ost–B, 2001. (=1.Nf3 d5 2.b4 f6 3.d4 e5 4.de5 Bb4)

5.Bd2 Qe7 6.Nc3 c6 7.e4 fe5 8.ed5 e4 (8...Nf6 9.dc6 Nc6 10.Bb5=+) 9.Nd4= Qe5 (9...Nf6 10.dc6 Nc6 11.Nc6 bc6 12.Rb1=+) 10.a3 Ba5 (worse 10...cd5 11.ab4 Qd4 12.Nb5+–) 11.dc6 Nf6? (better 11...Nc6!? 12.Bb5 Nge7= (worse 12...Qd4 13.Bc6 bc6 14.Qh5 Kf8 15.Qa5+–)) 12.cb7+– Bb7 White gets strong play along the open b–file 13.Bb5 Nbd7 14.Nce2 e3? (better 14...a6 15.Bd7 Nd7 16.Ba5 Qa5 17.Qd2 Qd2 18.Kd2 Ne5+–) 15.Ba5+– ef2 16.Kf2 0-0 17.Ke1 (17.Bb4 Ng4 18.Ke1 Nf2+–) 17...Ng4 (17...Bg2 18.Rg1 Qh2 19.Qc1+–) 18.Bd7 (18.Qb1 Bg2 19.Rg1 Nh2+–) 18...Ne3 Do you see the mate threat? 19.Qb1 Ng2 20.Kd2 Qa5 21.Qb4 (21.Kd3 Rab8 22.Qb3 Kh8+–) 21...Qg5 22.Kc3 Bd5 23.Rhd1 Rf7 24.Qa4 a6 (24...Qe5 25.Rg1 Rf2+=) 25.Rab1+– Ne3 26.Rd3 Qe5 27.Kb2 Rf2 (27...Rb8 28.Ka1 Nc2 29.Qc2 Rd7 30.Rb8 Qb8 31.Nc3+–) 28.Rc3 Kh8 29.Bc6 (29.Ka1 Rh2 30.Bc6 Bc6 31.Qc6 Re8+–) 29...Rb8+– 30.Ka1 Rb1 31.Kb1 Rf1 32.Nc1 Bg8 (better 32...Nd1 33.Rd3 Nf2 34.Qa6 Bg8+–) 33.Bb7?? (33.Rd3 Qh2 34.Nf3 Qh6+–) 33...Nc4?? (better 33...Nd1 34.Qb4 Nc3 35.Qc3 Rd1–+) 34.Rc4+– Qf4 Threatening mate: Qxc1 35.Ndb3 (35.Ba6?? Qc1 36.Ka2 Qb1; 35.Qa6?? Qc1 36.Ka2 Qb1) 35...Bc4 36.Qe8 Qf8 37.Qf8 Rf8 38.Na5 (38.Kb2 Rf7 39.Na5 g5+–) 38...Bf1+– 39.Ncb3 g5 40.Nd2 g4 41.Nf1 (better 41.Kb2!?+–) 41...Rf1= 42.Kb2 Rf2 43.Nc4 Rh2 44.Ne3 g3 45.Ba6 g2 46.Ng2 Rg2 47.a4 (47.Bb7 Rg5 48.a4 h5–/+) 47...Kg7 (47...h5 48.Bb7 Rg7 49.Bc8–/+) 48.Bb7 (48.Kc3 h5 49.a5 Rg5=+) 48...Rg5–/+ 49.Kc3 Kf6 (49...Rc5 50.Kb3 Kf6–/+) 50.Kd4 (better 50.Kb4!? Rg1 51.Bc6=+) 50...h5–+ 51.c4 Ke7 (51...h4!? 52.c5 Rg4 53.Ke3–+) 52.Bd5 Kd6 53.a5 Kc7 54.Ke3 h4 55.Kf2 (55.Kf4 Rg1 56.c5–/+) 55...h3 56.a6 Kb6 57.Bb7 h2 58.c5 Rc5 (58...Ka7 59.Bg2 Rc5 60.Bh1–+) 59.Kg2 Rh5 60.Kh1 Rh8 (60...Rh8 61.Be4 Ka6 62.Bd3 Kb6–+) 0–1. Balendo,Eduard Pavlovich – Vitolins,A, corr, 1990. (=1.Nf3 d5 2.b4 f6 3.d4 e5 4.de5 Bb4)

4.a3 e6 =.

4.Bb2 e6=+ 5.a3 Bd6 6.h3 Bh5 7.e3 Ne7 (7...a5 8.g4 Bg6 9.b5=+) 8.c4 (8.Bb5 c6 9.Bd3 a5=+) 8...c6 9.c5 Bc7 10.Nc3 (10.Bd3 Bg6=) 10...Nd7 (10...e5 11.de5 fe5 12.e4=) 11.g4 (11.Bd3 Bg6=) 11...Bf7 12.Bd3 e5 13.de5 Ne5 14.Ne5 fe5 15.e4 (15.b5 0-0=+) 15...a6 (15...d4 16.Ne2=+) 16.Qa4 (16.ed5 cd5 17.Qc2=) 16...h5 (better is 16...d4!? 17.Ne2 0-0=+) 17.ed5+= Nd5 18.Ne2 (better is 18.Rd1+=) 18…hg4–/+ (19.Bf5 Rh3 20.Rh3 gh3 21.Bh3 Qh4–/+) 0–1. Nowakowski – Gruszczynski, corr 1. AMM Poland, 1991.

4.c4 dc4 5.a3 +=.

4.c4 Bf3 5.gf3 (better is 5.ef3!? e5 6.a3 dc4 7.de5 Qd1 8.Kd1=) 5...dc4+= 6.Nc3 c6 7.b5 (7.a3 e6+=) 7...Qa5 8.Bd2 cb5 9.Rb1 (better is 9.a3–/+) 9...a6?? (9...b4!? 10.Ne4 c3 11.Bc1–+) 10.Bg2 (10.Nb5 Qd8 11.Nc3 b5+= (worse is 11...Qd4 12.Rb7 Qd6 13.Qa4 Nc6 14.Bh3+–)) 10...e6 (10...b4 11.Qa4 Qa4 12.Na4 Nc6–/+) 11.0-0? (11.Nb5 Qd8 12.Nc3 b5–/+ (12...Qd4?! 13.Rb7 Nd7 14.Qa4=)) 11...Nc6 (11...b4 12.Ne4–+) 12.e3? (better is 12.Nb5 Qd8 13.Nc3–/+) 12...b4–+ 13.Ne2 c3 14.Bc3 bc3 15.Rb7 Qa2 16.Nc3 Qa3 17.Rb3 Qa5 18.d5 (18.f4 Rc8–+) 18...ed5 19.Qd5 Nge7 20.Qd1 Nb4 21.f4 Rd8 22.Qc1 Nec6 23.Bc6 Nc6 24.e4 (24.Rd1 Rc8–+) 24...Be7 (better is 24...Nd4 25.Qd1–+) 25.Nd5 Bc5 (better is 25...Nd4 26.Re3 Bc5–+) 26.Nb6?? (better is 26.Rc3 Nd4 27.Rc5 Ne2 28.Kg2 Nc1 29.Ra5+/–) 26...0-0 (better is 26...Nd4 27.Qc4 Bb6–+) 27.Nc4 (27.Nc4 Qc7 28.Rd1–+). delightful_porridge – dhub noire, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 f6 3.d4 Bg4)

4.Nbd2 e5 5.de5 Bb4 6.Bb2 Nc6 7.c3 Ba5 8.ef6 Qf6 9.Rc1 Bf3 10.gf3 Nge7 11.e3 0-0 12.Be2 Bb6 13.Ba3 Be3 (better is 13...Qh4 14.Nf1 Rad8+=) 14.fe3+= Qh4 15.Kf1 Nf5 16.Bc5 b6 17.Kg2? (better is 17.e4 Ng3 18.hg3 Qh1 19.Bg1=) 17...bc5–+ 18.Nf1 Rad8 19.Rg1 Rfe8 20.Qd3 Qf6 21.f4 c4 22.Qd2 Ne3! 23.Ne3 Qf4 24.Bf3 Re3 (24...Qe3?! 25.Bd5 Rd5 26.Qd5 Qe6 27.Qe6 Re6 28.Rce1=) 25.Rcf1 Qe5 26.Re1 Rd3 (26...Rd3 27.Re5 Rd2 28.Re2 Re2 29.Be2 Ne5–+) 0–1. Barkhatov,L (2255) – Kupreichik,V (2430), Scandinavian Chess Tournament, 2011.

4.e3 e5=+ 5.Be2 (5.a3 e4 6.h3 Bh5=+ (< 6...ef3 7.hg4 fg2 8.Bg2+/–)) 5...Bf3–/+ 6.Bf3 e4 (6...Bb4?! 7.c3 Be7 8.Qb3+=) 7.Be2 Bb4 8.Bd2 (8...Nc6 9.c4=+). Kevin@home – AmericanRusky, ChessWorld.net, 2005.

4.h3 Bf3 5.ef3 e5 =.

4.a3 a5 5.b5 Be6 =.

4.a3 Bd6 5.c4 (5.d4 e4 6.Nfd2 Ne7=) 5...c6 (5...e4 6.Nd4 Be5 7.d3=) 6.Nc3 (6.d4 e4 7.Nfd2 Ne7=) 6...Ne7 (6...a5 7.ba5 Ne7 8.cd5 cd5 9.Qb3 Ra5 10.e4=) 7.c5 (7.d4 0-0=) 7...Bc7 8.h3 (8.d4 Bg4=) 8...0-0 (8...Be6 9.d4=) 9.Bb2 (9.Be2 f5=) 9...Qe8 (9...Be6 10.d4=+) 10.Be2 (10.Qc2 e4 11.Nd4 Nf5=) 10...Qg6=+ 11.Nh4 Qg5 12.g3 Be6 13.Qc2 (13.d4 Nd7=+) 13...Nd7 14.Nf3 (14.d4 Qh6=+) 14...Qh6 15.0-0-0 (15.d4!?=+) 15...a5–/+ (15...Bh3 16.Qb3 a5 17.Ng1+/–) 16.g4 (16.Rde1 ab4 (< 16...Bh3 17.Qd1+=) 17.ab4 b6–/+ (17...Bh3 18.Qb3+/–)) 16...ab4–+ 17.ab4 Rfb8 18.Rdg1 b6 19.g5 fg5–+ 20.Ng5 bc5 21.Ne6 Qe6 22.Bg4 Qd6 23.Bd7 cb4 24.Nd5 cd5 25.Ba4 Ra5 26.d4 b3! 27.Bb3 e4! 28.Qe4 Rb3 29.Qg4 Qc6 30.Kb1 Rb2! 31.Kb2 Rb5 (32.Ka1 Qa6#) 0–1. chessotka – pierre (2030), internet, 2006.

4.a3 Be6 5.Bb2 A) 5...Kf7 A1) 6.Nc3 a5 (6...Nd7 7.Nh4 g5 8.Nf3 g4 9.Nh4 f5 10.g3 Ngf6 11.Bd3 e4; 6...Bd6 7.Nh4 Ne7 8.Be2 Nbc6 9.Nb5 Rf8 10.0-0 Kg8 11.f4 Qd7; 6...Nc6 7.b5 Na5 8.Be2 Bd6 9.0-0 Ne7 10.d3 Qd7 11.g3 a6; 6...Nh6 7.Be2 Nf5 8.0-0 Be7 9.e4 de4 10.Ne4 Nc6 11.b5 Ncd4; 6...Ne7 7.Be2 Nbc6 8.0-0 Nf5 9.b5 Na5 10.e4 de4 11.Ne4 Qd5) 7.Be2 Nd7 8.b5 Nh6 9.0-0 Be7 10.d3 Nb6 11.Qd2 Nf5; A2) 6.h3 Ne7 (6...Nc6 7.Nc3 Nge7 8.b5 Na5 9.Be2 Nc4 10.Bc4 dc4 11.0-0 a6; 6...Nh6 7.Be2 Nc6 8.b5 e4 9.bc6 ef3 10.Bf3 bc6 11.Nc3 Rb8) 7.Nc3 Nbc6 8.Nh4 g5 9.b5 gh4 10.bc6 bc6 11.Qh5 Kg7; A3) 6.Be2 Nc6 (6...Nh6 7.Nc3 Nf5 8.0-0 Nc6 9.b5 Na5 10.e4 de4 11.Ne4 Qd5; 6...a5 7.b5 Nd7 8.Nc3 Nh6 9.0-0 Nb6 10.a4 Bb4 11.h3 Re8; 6...Nd7 7.0-0 a5 8.Nh4 g5 9.f4 gh4 10.f5 Bf5 11.Rf5 Nh6; 6...Bd6 7.Nc3 Ne7 8.0-0 Nbc6 9.e4 d4 10.Nb5 a6 11.Nd6 Qd6; 6...Ne7 7.Nc3 Nbc6 8.0-0 Nf5 9.b5 Na5 10.e4 de4 11.Ne4 Qd5) 7.0-0 Nh6 8.Nc3 Nf5 9.b5 Na5 10.e4 de4 11.Ne4 Qd5; B) 5...a5 6.Nc3 Nd7 (6...Nh6 7.Be2 Be7 8.0-0 0-0 9.e4 d4 10.Nd5 Bd5 11.ed5 Qd5; 6...Ne7 7.Be2 Nd7 8.0-0 Nf5 9.e4 de4 10.Ne4 ab4 11.ab4 Bb4; 6...Kf7 7.b5 Nh6 8.Be2 Nd7 9.0-0 Nb6 10.h3 Nf5 11.a4 Bb4; 6...ab4 7.ab4 Ra1 8.Qa1 Nc6 9.Bb5 Kf7 10.Bc6 bc6 11.Qa4 Qd6; 6...Bd6 7.Bd3 Ne7 8.0-0 0-0 9.e4 ab4 10.ab4 Nbc6 11.Ra8 Qa8) 7.ba5 Ra5 8.Be2 Kf7 9.0-0 Ne7 10.Nh4 Ng6 11.Bh5 f5; C) 5...Nd7 C1) 6.Nc3 a5 (6...Nh6 7.Be2 Be7 8.e4 de4 9.Ne4 0-0 10.0-0 Nb6 11.d4 Na4; 6...Kf7 7.Nh4 g5 8.Nf3 a5 9.ba5 Ra5 10.h3 Ne7 11.Be2 Kg7; 6...Bd6 7.h4 c6 8.Bd3 Nh6 9.0-0 0-0 10.Be2 a5 11.b5 Nf5; 6...Ne7 7.Nh4 a5 8.Be2 ab4 9.ab4 Ra1 10.Ba1 Nb6 11.0-0 g5) 7.ba5 Ra5 8.Be2 Ne7 9.0-0 Kf7 10.Nh4 g5 11.Nf3 Nf5; C2) 6.Be2 Bd6 (6...Be7 7.0-0 Nh6 8.Nc3 0-0 9.h3 Nb6 10.d3 a5 11.b5 Qd7; 6...Nh6 7.Nc3 Be7 8.e4 de4 9.Ne4 0-0 10.0-0 Nb6 11.d4 Na4; 6...a5 7.Nc3 ab4 8.ab4 Bb4 9.0-0 Ne7 10.Ra8 Qa8 11.Nb5 Ba5; 6...Ne7 7.Nc3 a5 8.0-0 Nf5 9.e4 ab4 10.ab4 de4 11.Ne4 Bb4; 6...Kf7 7.Nc3 a5 8.b5 Nh6 9.0-0 Nb6 10.d3 Be7 11.Rb1 Nf5) 7.0-0 Ne7 8.Nc3 0-0 9.e4 c5 10.Nd5 Nd5 11.ed5 Bd5; C3) 6.Bb5 c6 (6...Bd6 7.c4 c6 8.cd5 Bd5 9.Be2 Ne7 10.Nc3 a5 11.0-0 ab4; 6...Nh6 7.Nc3 a5 8.0-0 Kf7 9.Nh4 ab4 10.ab4 Ra1 11.Qa1 c6; 6...Kf7 7.0-0 a5 8.Nh4 c6 9.Bd3 Nh6 10.b5 e4 11.bc6 bc6; 6...a6 7.Ba4 Bd6 8.Nc3 Ne7 9.0-0 0-0 10.Bb3 a5 11.Ne4 Nf5; 6...a5 7.Nc3 Nh6 8.0-0 Kf7 9.Nh4 g5 10.Nf3 c6 11.Bd3 g4) 7.Bd3 Bd6 8.Nc3 Ne7 9.h4 Kf7 10.Be2 Qb6 11.0-0 Nf5; D) 5...Nc6 D1) 6.b5 Na5 7.d3 Bd6 8.Nc3 Ne7 9.Be2 0-0 10.0-0 a6 11.a4 c6; D2) 6.h3 a6 (6...Bd6 7.c4 dc4 8.Qc2 b5 9.Nc3 Rb8 10.d3 Bb4 11.dc4 Bc3; 6...Nh6 7.Nc3 a6 8.d4 e4 9.Nd2 Qd7 10.Be2 Nf5 11.0-0 Bd6; 6...e4 7.b5 ef3 8.bc6 fg2 9.Bg2 bc6 10.Nc3 Rb8 11.Rb1 Bd6) 7.Nc3 Nh6 8.Be2 e4 9.Nd4 Nd4 10.ed4 Bd6 11.0-0 0-0; D3) 6.g3 Nh6 (6...Be7 7.b5 Na5 8.Bd3 Qd7 9.Bc3 Nc4 10.0-0 Qb5 11.Be2 Qc6; 6...Kf7 7.Nc3 Nh6 8.Nh4 g5 9.b5 Na5 10.Nf3 g4 11.Nh4 d4; 6...Nge7 7.Nc3 e4 8.Nh4 g5 9.b5 Na5 10.Ng2 Bg7 11.d3 ed3; 6...Bd6 7.c4 dc4 8.Qc2 b5 9.Nc3 Rb8 10.d3 Bb4 11.dc4 Bc3; 6...a6 7.Nc3 Bd6 8.e4 Nge7 9.ed5 Nd5 10.Bd3 0-0 11.0-0 Nc3) 7.b5 Na5 8.Nc3 Be7 9.Be2 0-0 10.0-0 Qd7 11.d3 c6; D4) 6.Be2 Bd6 (6...Nh6 7.b5 Na5 8.0-0 Bd6 9.Nc3 0-0 10.e4 d4 11.Nd5 f5) 7.c4 dc4 8.Qc2 Qd7 9.Bc4 Nge7 10.Qb3 Kf7 11.Nc3 Bc4; D5) 6.Nc3 Bd6 (6...Nh6 7.Bb5 Be7 8.e4 de4 9.Ne4 0-0 10.0-0 Nf5 11.Bc6 bc6; 6...Be7 7.Bb5 Nh6 8.e4 de4 9.Ne4 0-0 10.0-0 a5 11.d4 ab4; 6...a6 7.Be2 Bd6 8.0-0 Nge7 9.e4 d4 10.Na4 0-0 11.g3 Ng6) 7.e4 d4 8.Nd5 Nge7 9.Bc4 0-0 10.Qe2 Qd7 11.0-0 Kh8.

4.a3 Be6 5.Nc3 A) 5...Bd6 A1) 6.Bd3 Nc6 (6...Ne7 7.0-0 Nbc6 8.e4 0-0 9.Bb2 Qd7 10.Qe2 a6 11.ed5 Nd5; 6...a6 7.0-0 Ne7 8.e4 d4 9.Ne2 0-0 10.c3 a5 11.Bb2 ab4; 6...Qd7 7.e4 Ne7 8.Bb2 0-0 9.0-0 Nbc6 10.Qe2 a6 11.ed5 Nd5; 6...Kf7 7.Bb2 Ne7 8.e4 a5 9.ed5 Nd5 10.Bc4 c6 11.d4 ab4; 6...Nh6 7.Bb2 Nc6 8.e4 de4 9.Ne4 0-0 10.Qe2 Nf5 11.0-0 Re8) 7.0-0 Nge7 8.e4 0-0 9.Bb2 a6 10.ed5 Nd5 11.Bc4 Nf4; A2) 6.Bb2 Ne7 (6...Nc6 7.e4 d4 8.Nd5 Nge7 9.Bc4 Qd7 10.0-0 0-0 11.c3 dc3; 6...a6 7.Nh4 Nh6 8.g3 Nc6 9.Be2 0-0 10.0-0 Be7 11.f4 d4) 7.e4 0-0 8.ed5 Nd5 9.Bc4 c6 10.Ne4 Be7 11.0-0 Nd7; A3) 6.e4 Ne7 (6...de4 7.Ne4 Ne7 8.Bd3 0-0 9.0-0 Nbc6 10.Bb2 a6 11.Re1 Nf5; 6...d4 7.Nb5 Be7 8.c3 d3 9.Ne5 fe5 10.Qh5 Bf7 11.Qe5 Na6) 7.Nd5 Nd5 8.ed5 Bd5 9.c4 Bf7 10.Qc2 a5 11.ba5 Na6; A4) 6.Nb5 Ne7 (6...Be7 7.d4 e4 8.Nd2 c6 9.Nc3 Nh6 10.Qh5 Bf7 11.Qh3 0-0; 6...Nd7 7.h4 Ne7 8.c3 0-0 9.Nd6 cd6 10.Be2 a5 11.0-0 ab4) 7.Bb2 a6 8.Nd6 Qd6 9.c4 0-0 10.c5 Qd7 11.Be2 Nbc6; B) 5...Nc6 B1) 6.Be2 Nh6 (6...Be7 7.0-0 Nh6 8.b5 Na5 9.d3 0-0 10.Bd2 c6 11.Qb1 Nf5; 6...Bd6 7.0-0 Nge7 8.d3 0-0 9.Bb2 a6 10.Qd2 Qe8 11.g3 Qg6) 7.0-0 Be7 8.b5 Na5 9.d3 0-0 10.Bd2 c6 11.Qb1 Nf5; B2) 6.Bd3 Nh6 (6...Be7 7.Bb2 Nh6 8.0-0 0-0 9.e4 de4 10.Be4 Nf5 11.b5 Na5; 6...e4 7.b5 ef3 8.bc6 fg2 9.Rg1 bc6 10.Rb1 Ne7 11.Rg2 Rb8; 6...a6 7.e4 d4 8.Ne2 Bd6 9.0-0 Nge7 10.c3 dc3 11.dc3 0-0; 6...Bd6 7.0-0 Nge7 8.e4 0-0 9.Bb2 Qd7 10.Qe2 a6 11.ed5 Nd5) 7.e4 d4 8.Nd5 Ne7 9.Ne7 Be7 10.c3 a5 11.ba5 Ra5; B3) 6.b5 Na5 7.Bb2 Nh6 8.Na4 Kf7 9.h3 a6 10.Nc3 ab5 11.Bb5 Nf5; B4) 6.Bb2 Nh6 (6...Bd6 7.e4 d4 8.Nd5 Nge7 9.Bc4 0-0 10.Qe2 Qd7 11.0-0 Rf7; 6...a6 7.e4 d4 8.Na4 b5 9.Nc5 Bc5 10.bc5 Qe7 11.Rc1 Qc5; 6...Be7 7.b5 Na5 8.g4 Nh6 9.g5 fg5 10.Ne5 0-0 11.Rg1 Qd6) 7.b5 Na5 8.Be2 Be7 9.0-0 0-0 10.h3 Qd7 11.a4 Nf5; C) 5...Nh6 C1) 6.Be2 Be7 (6...Nc6 7.0-0 Bd6 8.b5 Ne7 9.Bb2 0-0 10.a4 Nhf5 11.g4 Nh6; 6...Bd6 7.e4 d4 8.Na4 0-0 9.0-0 Nc6 10.h3 Qd7 11.d3 Nf7; 6...a5 7.Bb2 Be7 8.0-0 0-0 9.b5 Nd7 10.e4 d4 11.Na4 Nc5) 7.0-0 0-0 8.d3 Nc6 9.b5 Na5 10.Bd2 c6 11.Qb1 Nf5; C2) 6.h4 Be7 (6...Nc6 7.b5 Na5 8.d3 Be7 9.Be2 0-0 10.0-0 Ng4 11.Bd2 Qd7) 7.Bb2 0-0 8.Be2 Nc6 9.b5 Na5 10.0-0 Nc4 11.Bc4 dc4; C3) 6.Bd3 Kf7 (6...a5 7.Bb2 Kf7 8.e4 d4 9.Na4 ab4 10.ab4 Bb4 11.c3 dc3; 6...Nd7 7.0-0 Kf7 8.e4 d4 9.Na4 c6 10.c4 a5 11.b5 cb5; 6...Be7 7.Bb2 0-0 8.0-0 Nc6 9.e4 de4 10.Be4 Nf5 11.Qe2 Qd7 6...Nc6 7.e4 d4 8.Na4 a6 9.0-0 b5 10.Nb2 Be7 11.c3 0-0) 7.Be2 Nc6 8.0-0 Nf5 9.d3 Be7 10.h3 Qd7 11.b5 Na5; C4) 6.h3 Bd6 (6...a5 7.Bb2 Nd7 8.Bb5 c6 9.Bd3 Kf7 10.Be2 ab4 11.ab4 Bb4; 6...Nc6 7.b5 Na5 8.Be2 Be7 9.0-0 0-0 10.d3 Nf5 11.Bd2 c6; 6...Kf7 7.Be2 Nc6 8.d3 Qd7 9.0-0 Nf5 10.Bb2 Be7 11.Qd2 a6; 6...Nf5 7.Be2 Nc6 8.d3 Be7 9.0-0 0-0 10.b5 Na5 11.Bd2 c6; 6...Be7 7.Bd3 0-0 8.0-0 Nc6 9.e4 de4 10.Be4 Nf5 11.Qe2 Rb8) 7.Bd3 0-0 8.Bb2 a5 9.0-0 Na6 10.b5 Nc5 11.Be2 Ne4; C5) 6.Bb5 Kf7 (6...Nc6 7.0-0 Kf7 8.e4 d4 9.Na4 a5 10.c3 ab4 11.ab4 dc3; 6...Nd7 7.0-0 Bd6 8.Qe2 c6 9.Ba4 a5 10.b5 Nc5 11.Nd4 Na4; 6...c6 7.Ba4 Be7 8.0-0 0-0 9.Qe2 Nd7 10.Bb2 a5 11.Bb3 ab4) 7.0-0 a5 8.ba5 Ra5 9.a4 Nd7 10.Nh4 c6 11.f4 cb5.

4.a3 Be6 5.c4 dc4 (5...Ne7 6.cd5 Nd5 7.e4 Nb6 8.d4 Be7 9.Nc3 0-0 10.Be2 a5 11.b5 N8d7) 6.Qc2 b5 7.d3 a5 8.ba5 (8.dc4 ab4 9.cb5 Nd7 10.Bc4 Nc5 11.Be6 Ne6) 8...Nc6 9.dc4 Na5 10.Nbd2 bc4 11.Nc4 Qd5 12.Ncd2 Bd6 13.Bd3 Qc5 14.Bh7 Ne7 15.Qc5 Bc5 16.Bc2 Nd5 17.0-0 Kf7 18.Ne4 Be7 19.h3 Rhb8 20.Nfd2 (20.Ned2 Nc3+=) 20...Rb6 (20...f5 21.Ng3 e4 22.a4=) 21.Rb1 (21.Ng3 Nc3+=) 21...f5 22.Ng3 g6 (22...e4!?=) 23.e4+– Nc3 (better 23...fe4!? 24.Rb6 cb6 25.Be4 Nc6+–) 24.Rb6 cb6 25.ef5 gf5 26.Bb2 Rc8 27.Bc3 Rc3 28.Bf5 Ra3 29.Be6 Ke6 30.Rb1 Bc5 31.Nge4 Bd4 32.Nf3 Nc4 33.h4 Kf5 34.Ng3 Kg4 35.h5 Bc5 36.Re1 Bf2? (better 36...Rf3 37.gf3 Kf3+–) 37.Kf2 Ra2 38.Re2 Re2 39.Ne2 (better 39.Ke2 Nd6 40.Kf2+– (40.Ne5?! Kf4+–)) 39...Kh5 40.Nc3 Kg4 41.g3 Kf5 42.Nh4 Kg4 43.Ng2 Nd6 44.Ne3 Kg5 45.Kg2 b5 46.Ned5 Kf5 Black intends e4 47.Kh3 e4 48.g4 (48.Nb4 Kf6+–) 48...Ke5 49.g5 Kf5 50.Kh4 b4 51.Ne2 (51.Nb4!? Nf7+–) 51...b3+– 52.Ne3 Kg6 53.Nf4 Kg7 54.Ne2 b2 (54...Kg6 55.Kg4 Nf7+=) 55.Nc3+= Kg6 56.Ned1 (56.Kg4!?+=) 56…Nf7 ½–½. Ivanets,Vladimir (2190) – Sorensen,Bent (2320), Rijeka CRO, 2011. (=1.Nf3 d5 2.b4 f6 3.e3 e5)

4.a3 Be6 5.d4 e4 6.Nfd2 c6 7.c4 f5 8.Qb3 Nf6 9.Nc3 Be7 10.b5 Nbd7 11.a4 0-0 12.Be2 Bf7 13.a5 Qc7 14.c5 (14.cd5 Nd5 15.Nd5 Bd5=) 14...Bh5 (14...Nc5 15.dc5 d4 16.b6–/+) 15.a6 (15.Bh5!? Nh5 16.g4+=) 15...Be2+= 16.Ke2 b6 17.Ba3 (better is 17.cb6!? Nb6 18.Ba3+=) 17...bc5–+ 18.dc5 Rab8 19.Rac1 f4 (19...Bc5 20.Qa2–+) 20.Qa2 fe3 21.fe3 Kh8 (21...Nc5 22.Bc5 Bc5 23.bc6 Qc6 24.Rhf1–+) 22.g3 Qe5 (22...Ne5!? 23.Rcf1–+) 23.bc6–/+ Qh5 24.Ke1? (better is 24.Kf1 Ne5 25.Kg1–+) 24...Ne5–+ (24...Nc5 25.Bc5 Bc5 26.Nd5 Nd5 27.Rc5–/+) 25.Nb3 (25.c7 Nd3 26.Kf1 Rbc8–+) 25...Nd3 (better is 25...Nf3 26.Kd1 Rb3 27.Kc2–+) 26.Kd2 Ng4 27.Rcf1 Rf1 28.Rf1 Qh2 29.Ne2 Nge5 (29...Bg5 30.Rf5–+) 30.c7 (30.Na5 Nf3 31.Rf3 ef3 32.Kd3 f2–+ (32...Qe2?! 33.Qe2 fe2 34.Ke2–/+)) 30...Rc8 (30...Nc4 31.Kc3 Rc8 32.Nbd4 Na3 33.Qd5+/–) 31.Nbd4 (31.Na5 Nf3 32.Rf3 ef3 33.Kd3 f2–+) 31...Nc4 32.Kc3 Rc7 (32...Qh6 33.Nf4 Ne3 34.Nd5 Nf1 35.Ne7+=) 33.Qb3 Qh3 34.Rf5 Rc8 35.Qb7 Rg8 36.Qe7 Qh1 (36...Na3 37.Rf8 (37.Rd5?? Qh1 38.Qb7 Qa1 39.Kb3 Qb2 40.Ka4 Nb5–+) 37...h6 38.c6+/–) 37.Rd5? (37.Nc2 Na3 38.Rf8=) 37...Ne3?? (37...Na3 38.Qb7 Qa1 39.Kb3 Qb2 40.Ka4 Nb5–+) 38.Rd8+– Qe1 39.Kb3 Qd1? 40.Ka2 Qd2 41.Kb1 h6 42.Rg8 Kg8 43.Qe8 Kh7 44.Qe4 Kg8 45.Qe6 Kh8 46.Qb3 (46.Qb3 Qe1 47.Nc1 Nc1 48.Bc1+–) 1–0. Chandler,Patrick (2180) – Votruba,Pavel (2135), Landesliga Nord, 2008. (=1.Nf3 d5 2.b4 f6 3.e3 e5)

4.a3 Be6 5.Be2 Bd6 6.c4 dc4 7.Qc2 Qd7 8.Bc4 Qc6 9.Bd3 Qc2 10.Bc2 Ne7 11.Nc3 a5.

4.a3 Bg4 5.Nc3 c6 6.h3 Bh5 7.g4 Bf7 8.Bb2 Bd6 9.Qe2 Qc7 10.0-0-0 (10.e4 d4 11.Nd1 Ne7+=) 10...Nd7 11.d4 e4 12.Nh4 g6 (12...Ne7!?–/+) 13.f3+= ef3 14.Nf3 0-0-0 15.Qd2 h5 16.g5 f5 17.h4 f4 (17...Ne7!?+=) 18.e4= de4 19.Ne4 Bd5 20.Bd3 Ne7 21.Nd6 (21.c4!? Be4 22.Be4+/–) 21...Qd6+= 22.Rhf1 Nf5 (better is 22...Bf3!? 23.Rf3 Nd5=) 23.Bf5+/– gf5 24.Ne5 Ne5 25.de5 (25.Qf4? Ng6 26.Qf5 Kb8–+) 25...Qe6 26.Qf4 Rhf8 27.Rf2 b6 28.Rfd2 b5 29.Qe3 Kb7 30.a4! Rd7 (30...ba4 31.c4 Combination) 31.Qc5 Rfd8 32.ab5 Bf3 (32...cb5 33.Qb5 Ka8 34.c4 Bc4 35.Qd7 Rd7 36.Rd7+–) 33.bc6 Qc6 34.Rd7 Rd7 35.Rd7 Qd7 36.Bd4 Bd5 37.c4 Be4 38.Qa7 Kc8 39.Qd7 Kd7 40.g6 Bd3 41.c5 Bc4 42.Kd2 f4 43.Kc3 Be6 44.b5 Kc7 45.g7 Ba2 46.c6 Bd5 47.Kb4 Bg8 48.Kc5 f3 49.b6 Kb8 50.Kd6 Kc8 51.e6 1–0. Adriamaci – Zemljanin, playchess.de, 2005.

4.Bb2 (--> 1.b4 e5 2.Bb2 f6 3.e3 d5 4.Nf3).

4.c4 Bb4 5.a3 Ba5 6.cd5 Qd5 7.Nc3 Bc3 8.dc3 Qd1 9.Kd1-/+.

4.c4 Bb4 5.a3 Bc5 6.Qc2 (6.d4 ed4 7.ed4 Bb6=+) 6...Qd6 (6...Nc6 7.cd5 Qd5 8.Bc4=+) 7.Be2 (7.d4 ed4 8.ed4 Bb6=+) 7...Be6 (7...e4 8.Nd4 Bd4 9.ed4–/+) 8.0-0 (better 8.d4 Bb6 9.c5 Ba5 10.Bd2 Bd2 11.Nbd2=) 8...c6?? (8...e4 9.d4 ef3 10.Bf3=+) 9.d3?? (9.d4 dc4 10.dc5 Qc5+–) 9...Ne7?? (9...d4 10.ed4 Bd4 11.Nd4 Qd4 12.Nc3=+) 10.Nbd2?? (better 10.d4!?+–) 10...Nd7 (10...Bf5 11.Qb2 Bb6 12.d4 ed4 13.Nd4=+) 11.Bb2 (better 11.d4!? Bb6 12.c5 Nc5 13.dc5 Qc5 14.Qb3+=) 11...Bf5–/+ 12.e4 (12.Nh4 Qe6=+) 12...de4 (12...Bg6 13.Qb3–/+) 13.de4=+ Bg4 14.Rfd1 (14.Rad1 Ng6=+ (14...Ba3 15.Nb1+–)) 14...Qc7 (14...b6 15.Nb3 Qe6 16.h3 Bf3 17.Bf3+=) 15.Nb3 Qb6 16.Nc5 Nc5 17.h3 (17.Bc3 Qb3 18.Qb3 Nb3–/+) 17...Be6 (17...Bf3 18.Bf3 0-0 19.Rab1=+) 18.Rab1 (18.Bc3 Qb3 19.Qb3 Nb3=) 18...Qc7 (18...Qa5 19.Kh2=+) 19.Nh4 (19.a4 Qa5 20.Ba3 b6=+) 19...0-0–/+ 20.a4 f5 (20...Rad8 21.Ba3 Na6 22.c5=+) 21.ef5 (21.Nf3 fe4 (worse 21...Ne4 22.Be5 Qc8 23.Qb2+=) 22.Be5 Qc8=+) 21...Nf5 22.Nf3 (22.Ba3 Nh4 23.Bc5 Bf5=+) 22...e4 23.Ng5 Nd6?? (better 23...e3 24.Bd4 ef2 25.Bf2 Qe7 26.Ne6 Ne6=+) 24.Be5 (24.Ba3 Nf7 25.Nf7 Rf7 26.Bc5 Bf5+–) 24...Rad8 25.Bd4?? (better 25.Ne6 Ne6 26.c5+–) 25...Rf5+= 26.Ne6 Ne6 27.Bb2 (27.Ba7 Qe7+=) 27...Qb6 (better 27...Qf7 28.Bg4 Rg5=+) 28.Ba3?? (better 28.Bg4 Qc5 29.a5+=) 28...Qf2–+ 29.Kh1 Qg3 (better 29...Nf4 30.Qe4 Ne4 (30...Ne2?! 31.Qe7 Re8 32.Qd6–+; 30...Qe2?! 31.Qe2 Ne2 32.Rd6 Rd6 33.Bd6–/+) 31.Rd8 Kf7–+) 30.Bd6 Rd6 31.Rd6 Qd6 32.Qe4 (32.Rb7 Qd4–/+) 32...Re5 33.Qd3 (33.Qg4 h5 34.Qg3 h4–/+) 33...Qd3–+ 34.Bd3 Nc5 35.Bc2 Re2 (35...g6 36.Kg1–+) 36.Bb3 (36.Rc1 g6–+) 36...Re3 (36...Nb3?! 37.Rb3 b6 38.Kh2–/+) 37.Bc2 Rc3 38.Rc1 (38.Rb2–+) 38...Nb3 (better 38...Nd3 39.Rb1 Rc2 40.Rb7 a5–+) 39.Bh7!+– Kh7 40.Rc3 Nc5 41.a5 g5 (41...Kg6 42.Rf3+–) 42.g4 (42.Re3 Kg6+–) 42...b6 (42...Kg6 43.Kg2+–) 43.ab6 ab6 44.Kg2 (44.Ra3 Kg7+–) 44...Kg6 45.Kf3 (45.Rc1!? Nd7+–) 45...Kf6 46.Re3 b5 (46...Nd7 47.Re4+–) 47.cb5 cb5 48.Rc3 Ne6 49.Rc6 (49.Ke4!? b4 50.Rc6 Ke7+–) 49...Ke5 50.Rb6 Nd4 51.Ke3 b4 52.Rb7 (52.Kd3 b3+–) 52...b3 53.Re7 (53.Kd3 Ne6 54.Rb5 Kf4+–) 53...Kd6 (better 53...Ne6+–) 54.Rb7 (54.Kd4?! Ke7 55.Kc3 Ke6 56.Kb3 Ke5=) 54...Ke5 55.Re7 (55.Kd3!? Ne6 56.Rb5 Kf4+–) 55...Kd6 56.Rb7?? (56.Re8 Kd7 57.Rf8+– (57.Kd4?! Ke8 58.Kc3 Ke7=)) 56…Ke5= ½–½. Goldmund,Heike – Segur,Laurine, FICGS, 2016.

4.c4 Bb4 5.Qb3 Bc5 6.cd5 Ne7 7.Nc3 Bg4 (7...Nd7 8.Ne4=) 8.Be2 (8.Ne5 fe5 9.Qc4 Bc8 10.Qc5 Nd7+/-) 8...a6 (8...Bb6 9.h3 Bc8 10.d4+=) 9.Ng5 (9.Qb7 Nd7+/-) 9...Be2 (better 9...Bf5!? 10.Nge4 Bb6=) 10.Ne6+/- Qd6 (10...Qc8!?+/-) 11.Qb7+- (worse 11.Ke2 Bb6+/-; 11.Ne2?! Bb6 12.e4 g6+/-) 11...Kf7 12.Qa8 (12.Ke2?! Ra7 13.Qb3 Bb4+=; 12.Ne2 Nd7 13.Qb3 Rab8=+ (13...Qd5?! 14.Nc7 Qb3 15.ab3=; worse 13...Nd5 14.Nc7 Qc7 15.Qd5 Kg6 16.Qd3 Kh6 17.Qc4+/-)) 12...Bd3 13.Nc5 Qc5 14.a4 c6? (better 14...Qd6+-) 15.Ba3 Qb6 16.Be7 (better 16.a5!? Qd8 17.Qb7 Qd7 18.Qd7 Nd7 19.Be7 Ke7 20.dc6 Nc5+-) 16...Ke7 17.f3 (17.a5!? Qc7+-) 17...Rd8 18.Kf2 Rd6?? (better 18...Kf8+-) 19.Rhb1! Qd8 (19...Bb1 20.Rb1 Decoy) 20.Rb8 Qa5 (20...Qd7+-) 21.Rb7 Rd7 22.Qc8 (better 22.d6 Kf7 23.Rd7 Kg6 24.Qf8 Kf5 25.g4 Kg5 26.Qg7 Bg6 27.Kg3 Qc3 28.h4) 22...Rb7 23.Qb7 Kf8 24.dc6 e4 (24...Bf5 25.Qb8 Kf7+-) 25.c7 (25.c7 Qc7 26.Qc7+-) 1-0. OnlyPolishOpening (1960) - smileyman3 (2005), lichess.org, 2020.

4.c4 Bb4 5.Qb3 Bd6 6.cd5 Ne7=.

4.c4 Bb4 5.Qb3 e4 6.Qb4 ef3 7.Ba3=.

4.c4! d4 5.c5!

4.c4 Ne7 5.d4= e4 6.Nfd2 c6 (6...Be6 7.Be2=) 7.Be2 Nf5 8.0-0 (8.c5 b6=) 8...Be6 (8...Bb4!? 9.Qb3 Ba5+=) 9.Qb3 Bd6 (9...dc4 10.Bc4 (10.Nc4? b5–+) 10...Bc4 11.Nc4+=) 10.Nc3 (10.c5 Bc7 11.Ne4 0-0+/–) 10...Bc7 (10...Qd7!?+=) 11.cd5+/– Qd6 (11...Bd5 12.Qb1+/–) 12.g3+– cd5 13.Nb5 Qd7 14.Nc7 (14.Ne4 Bb6 15.Nc5 Bc5 16.bc5 0-0+–) 14...Qc7 15.Ne4! h5 (15...de4 A pinning theme 16.Qe6 A double attack) 16.Nc5 Bf7 17.Qd3 (17.Bf3 Ne7+–) 17...Nd6 18.e4 b6 (18...de4 19.Ne4 Ne4 20.Qe4 Kd8 21.Bf4+–) 19.e5 (19.ed5 Bd5 20.Bf3 Bf3 21.Qf3 Qc6 22.Re1 Kf7 23.Qb3 Kg6+–) 19...bc5 (19...fe5 20.de5 bc5 21.ed6 Qd6 22.bc5 Qf6+–) 20.ed6 Qd6 21.dc5 Qd7 22.b5 h4 23.c6 Qc8 24.Ba3 hg3 25.Qe3 Qe6 26.Qe6 Be6 27.fg3 Kf7 28.Rac1 Rc8 29.Bd6 a6 30.a4 ab5 31.ab5 Ra2 32.Rfe1 g6 33.h4 Rb2 34.h5 Bf5 35.Ra1 Nc6 36.bc6 Rc6 37.Ra7 Kg8 38.Bc4! Rc8 39.Bd5 Kh8 40.Be7 Rb6 41.h6 Bg4 42.Rf1 Bf5 43.g4! (43.g4 Bg4 44.Rf6 Rc1 45.Kf2+–) 1–0. Santasiere,Anthony – Coggan, USA, 1945.

4.Ne5? fe5 5.Qh5 Ke7 6.Qe5 Kf7 –+.

4.Ne5?? Bf5?? 5.Nd3+= (5.Bd3 fe5 6.Bf5 Bb4 7.a3+–) 5...Bd3 (5...Nc6!?+=; 5...Kf7!?+–) 6.Bd3+– (worse 6.cd3 Bb4 7.Nc3 c6+=) 6...Bb4? (6...g6 7.a3+–) 7.Qh5?? (better 7.Qg4 Bf8 8.Qh5 Kd7 9.c4+–) 7...Kf8+– 8.a3 Be7 (8...Ba5 9.Bb2+– (9.Bh7?! Nc6=)) 9.c4 (9.Nc3!? c6+–) 9...d4+– 10.Be4 c6 (10...Nc6 11.Bb2+– (11.Bh7?! Ne5 12.f4 g6=)) 11.0-0 (11.Bb2 c5+–) 11...Nh6 (11...Na6!? 12.Bb2 Nc5+–) 12.Bb2+– de3 13.de3 (13.fe3!? Nf7+–) 13...Nd7+– 14.Rd1 (14.Nc3 Qb6 15.Qe2 f5+–) 14...Qe8+– 15.Qh3 (15.Qe2 Nc5 16.Bc2 Nf7+–) 15...Rd8 (15...Nc5 16.Nd2+–) 16.Nc3 (16.Bd4 Nf7 17.f4 Nd6+–) 16...Ne5 (16...Nf7 17.Bd3+– (17.Bh7 Ng5 18.Qf5 Rh7–+)) 17.Qe6 (17.Rd8!? Bd8 18.Qc8+–) 17...Qf7+= 18.Rd8 Bd8 19.Qc8 (19.Qh3 f5 (19...Nc4 20.Rd1 Qe7 21.Rd7+–) 20.Rd1 Bc7+=) 19...Qc7 20.Qc7 Bc7 21.c5 Ke7 (21...f5 22.Bc2 Nc4 23.Rb1+=) 22.Rd1 (22.Ne2 g6=) 22...f5= 23.Bc2 g5 (23...Rd8!?+=) 24.Ne2+– Rg8 (24...Rd8 25.Rd8 Kd8 26.Nd4+–) 25.Nd4 Nc4 26.Bc1 (better 26.Ba1 Na3 27.Nf5 Nf5 28.Bf5+–) 26...Kf6?? (better 26...Rf8!?+–; better 26...Rd8+–) 27.Bb3+– Ne5 (27...Na5 28.Bg8 Ng8 29.Bb2+–) 28.Bg8 Ng8 29.Ne2 (29.Bb2 Ne7 30.Ne2 Ke6 31.Be5 Be5+–) 29...Ne7 (29...Ke7 30.f4 gf4 31.ef4+–) 30.f4 gf4 31.ef4 (31.Nf4?! Kf7+–) 31...N5g6? (31...Nc4 32.Rd4 b5 33.Rd7+–) 32.Rd7 Nd5 33.Rh7 Ndf4 (33...Nge7 34.Bb2 Kg6 35.Rg7 Kh6 36.h3+–) 34.Nf4 (34.Rc7?! Ne2 35.Kf2 Nc1 36.Rb7 a5=+; 34.Rc7?! Ne2 35.Kf1 Nc1 36.Rb7 a5=) 34...Nf4 (34...Bf4 35.Bf4 Nf4 36.Rb7+–) 35.Rc7 Ne2 36.Kf2 Nc1 37.Rb7 Nd3 (37...f4 38.Ra7 Nd3 39.Ke2 Nc1 40.Kf3+–) 38.Ke3 Nc5 39.Ra7 Ne6 (39...Ke6 40.a4 Kd6 41.a5+–) 40.a4 c5 (40...Nc5+–; 40...f4 41.Ke4 Nc5 42.Kf4 Nd3 43.Ke4 Nc5 44.Ke3 Ke6+–) 41.Ra6 Ke5 42.Re6! (42.Re6 Ke6 43.h4+–) 1–0. Garcia Corada,Pedro – Alonso de Dompablo,Pablo, Valladolid CC Autumn, 1989. (=1.Nf3 d5 2.b4 f6 3.e3 e5)

4.c4+/– e5 5.cd5 Qd5 (5...Ne7!? 6.Qa4 Qd7+=) 6.Nc3 Qd7 7.a3 (7.b5 Be6+/–) 7...Bd6 8.h3 (8.Bc4 Nc6+/–) 8...Be6+= 9.d4 Ne7 10.de5 fe5 (10...Be5 11.Bb2 Ng6 12.Ne5 Ne5 13.Nb5+=) 11.Ng5+/– Nbc6 12.Ne6 Qe6 13.Be2 (13.Qg4 Qg6+/–) 13...e4 (13...Rd8!? 14.Qc2 0-0+/–) 14.Qc2+/– Be5 15.Rb1 (15.0-0 Bc3 16.Qc3 0-0-0+/–) 15...Qg6 (15...Bc3 16.Qc3 Qf6 17.Qc4+/–) 16.0-0+/– Bc3 17.Qc3 Nf5? (17...Nd5!? 18.Qc5 0-0-0+/–) 18.Bb2 (better is 18.b5!? Nd8 19.Qe5 Ne6 20.Bc4+– (20.Qe4?! 0-0-0 21.Qg4 Rhe8+–)) 18...Nh4 19.g3 Nf3 20.Bf3 ef3 21.Qg7 (21.b5 Nd8 22.Qc7 0-0+–) 21...Qg7 22.Bg7 Rg8 23.Bc3 Ne7 24.Rbd1 Ng6 (24...Rg6 25.e4 Ra6 26.Bb2+–) 25.Rd3 Rd8 26.Rfd1 Rd3 27.Rd3 1–0. Ivanets,Vladimir (2155) – Koshelev,Vladimir (1900), Fide Open, 2013. (=1.Nf3 d5 2.b4 f6)

4.d4 e6 5.Bb5 (better is 5.a3!?=) 5...c6–/+ 6.Bd3 Bb4 7.c3 Bd6 8.Nbd2 e5 9.Be2 ed4 (9...e4!? 10.Ng1 Be2 11.Ne2 Na6–/+) 10.cd4 Nd7 11.0-0 g5 12.h3 Bf5 13.Nh2 Qc7 14.Bh5 Bg6 15.Bg4?? (15.Bg6 hg6 16.Nhf3 g4 17.hg4 Bh2 18.Kh1 Ne5–+) 15...h5 (better is 15...Bh2 16.Kh1 Bd6–+) 16.Bd7 Qd7 17.f3? (better is 17.Qb3!?–+) 17...Bd3 18.Re1 Bg3 19.Nb3 Be1 20.Qd3 b6 21.Qg6 Qf7 22.Qf7 Kf7 23.Bb2 Bg3 24.e4 Bh2 25.Kh2 de4 26.fe4 Ne7 27.Re1 a5 28.g3 a4 29.Nd2 Rhe8 30.Nc4 Ke6?? 31.Nb6 Ra5 32.Ba3 Rb5 33.Be7 Rb6 34.Ba3 Kd7 35.g4 hg4 36.hg4 Re6 37.Kg3 Rb8 38.Bc5 Rb2 39.a3 Re8 40.Re3 Rh8 41.e5 fe5 42.Re5 Rb3 43.Kg2 Rb2 44.Kf3 Rh3+= 45.Ke4 Re2 46.Kf5 Rf3 47.Kg5 Re5 48.de5 Ke6 49.Bd6 c5?? 50.Bc5+= Ke5 51.Kg6 Rc3 52.Bb4? Rc6 53.Kg5–/+ Ke6 54.Kg6? Rc8 55.g5? Rg8–+ 56.Kh5 Kf7 57.Bc3+= Rg6 58.Bb4 Re6 59.Bc5 Kg7 60.Bb4 Rg6 61.Bf8 Kf7 62.Bb4 Rg8 63.Bc3 Rg6 64.Bb4–/+ Kg7 65.Bf8 Kf7 66.Bb4–/+ Rb6 67.Bc5 Rc6 68.Bb4 Kg7 69.Be7 Kh7 70.Bb4 Rc2 71.g6? Kg7–+ 72.Kg5 Rg2 73.Kf5 Rg6 74.Ke5 Rc6 75.Kd5 Rc8 76.Kd6 Kf6 77.Kd5 Kf5 78.Kd4 Kf4 79.Bd2 Kf3 80.Bb4 Ke2 81.Ba5 Kd1 82.Kd3 Kc1 83.Bb4 Kb2 84.Kd4 Kb3 85.Kd3 Rd8 86.Ke4 Rd7 87.Ke3 Kb2 88.Ke4 Kb3 89.Ke3 Kc2 90.Ke4 Rd3 91.Bf8 Kc3 92.Bb4 Kc2 93.Bf8 Rb3 94.Kd4 Kb2 95.Kc4 Rc3 96.Kd4 Ra3?? 97.Ba3= Ka3 98.Kc3 Ka2 99.Kc2 a3 100.Kc1 Kb3 101.Kb1 a2 102.Ka1 Ka3 ½–½. Mr.Oldenslo – dhub noire, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 f6)

4.c4 c6 5.Qb3 Nf7 6.Nc3 e6 7.d4+= Bd6 8.e4 Qe7 9.a3 Nd7 10.c5 Bc7 11.Bd3 e5 (11...f5 12.e5+/–) 12.0-0 (12.ed5 ed4 13.Ne2 cd5 14.Qd5 a5 15.Nfd4 Nfe5+/–) 12...ed4+= 13.Nd4 Nde5 (13...Bh2 14.Kh2 Qe5 15.Kg1 Qd4 16.Rd1+/–) 14.Bc2+/– de4 15.Be4 0-0 16.f4 Ng6 17.Qc2 (17.Bg6 hg6 18.Ra2 Qd7+/–) 17...Rd8+= 18.Nde2 (18.Qf2 Qd7 19.Rd1 Qg4+=) 18...Nf8 19.Bb2 (19.Rf3 Bg4 20.Re3 Qd7+=) 19...Nh6 (19...f5 20.Bf3= (20.Bf5 Qe3 21.Kh1 Rd2–/+)) 20.Rae1 (20.Rad1 Rd1 21.Rd1 f5+=) 20...Qf7 (20...f5 21.Bf3+=) 21.Nc1 Be6 22.Bd3 Bc4 23.Ne4 Bd3= 24.Nd3 Ng6 25.Ne5 fe5–/+ 26.fe5 Qe7 27.Qb3 Kh8 28.Nd6 Rf8 29.Rf8 Rf8–+ 30.Nb7 Be5 31.Be5 Ne5 32.Nd6?? Nf3! (32...Nf3 33.gf3 Qe1 34.Kg2 Qd2 35.Kh3 Qf2 36.Nf7 Nf7 37.f4 Ng5 38.fg5 Rf4 39.Qg3 Qf1 40.Qg2 Rf3 41.Kh4 Qg2 42.g6 Rh3#) 0–1. Kliman,Daniel – Saralegui,M (2175), ch–URU, Montevideo URU, 2003.

4.c4 e5 5.cd5 Qd5 6.Nc3 =.

4.c4 e6 5.Qb3 a5 6.b5 Nd7 7.d4+= dc4 8.Bc4 Nb6 9.Bd3 (9.Be6? a4 10.Qc2 Be6–+) 9...Nf7 (9...Bd6 10.0-0+= (10.Nc3 0-0 11.0-0 Bd7) 10...a4 11.Qc2 Nd5; 9...a4 10.Qc2 Nd5 11.Bh7 Bd7) 10.0-0+/– Qd5 (10...Be7 11.Nc3 0-0) 11.Qc2 (11.Nc3 Qb3) 11...Bd6 12.Nc3 Qh5 13.Ne4 0-0 (13...Bd7 14.Rb1+/–) 14.Nd6 (14.Ng3 Bg3 15.fg3 e5+/–) 14...cd6+= 15.e4 (15.Rd1 Nd5+=) 15...Bd7 16.a4 Rfc8 17.Qe2 d5 18.Bf4 de4 19.Be4 Nd5 20.Bd5 (20.Qd2 Qg4 21.Bd5 ed5+=) 20...Qd5 (20...ed5 21.Rfe1=) 21.Rfc1 Nd6 22.Rc5 Qe4 23.Qe3 Qe3= 24.fe3 Ne4 25.Rc7= Rc7 26.Bc7 Nc3 27.Kf2 Nd5 28.Bd6 Rc8 29.Bc5 Be8 30.e4+= Nc3 31.Ke3 Bg6 32.Nd2 f5 33.Ra3 Nd1 34.Kf4 fe4 35.Ne4?? Nb2?? 36.Nd6+= Rc7 37.b6 Re7 38.Kg3 Rd7 39.Nc8 Nc4 40.Rf3 h6 41.Ne7 Kh7 42.Ng6 Kg6 43.Rc3 Nd6 44.Kf4+= Kf7 45.Ke5 Ne8 46.Rf3 Nf6 47.Bd6 Rd8 48.h3 Rc8 49.Bc7 Ke7 50.Rg3 Nd7 51.Ke4 Nf6 52.Kd3 Ne8 53.Be5 Kf7 54.Rf3 Ke7 55.Rf1+= Rc6 56.Rb1 g6 57.Rb5 Nd6+= 58.Bd6 Kd6 59.Rb1 Ke7 60.Rb5 Kd6 61.Rb1 ½–½. Zurek,Milan (2405) – Sikora Lerch,Jan (2380), CSR–chT, 1991.

3.a3 c6 4.e3 g6 5.c4 Bg7 6.Bb2 0-0 7.Be2 Nbd7 8.0-0 Re8 9.d4 Ne4 10.Nc3 Ndf6 11.Ne4 Ne4 12.Nd2 Nf6 13.a4 Bf5 14.Rc1 h5 15.Re1 Qd6 16.c5 Qc7 17.h3 Nd7 18.Nf3 Bf6 19.Bd3 Bd3 20.Qd3 Bg7 21.Qb1 a6 22.Bc3 e6 23.Re2 e5 24.de5 Ne5 25.Ne5 Be5 26.Be5 Re5 27.Rd2 Qe7 28.Qb2 Qe6 29.Rd4 Re8 30.Rcd1 Rg5 31.Kh1 Qf6 32.R4d2 Rge5 33.b5 ab5 34.ab5 g5 35.Kg1 g4 36.hg4 hg4 37.Rd4 Qg6 38.bc6 bc6 39.Qe2 f5 40.g3 Qh6 1–0. Ivanets,V (2185) – Denisov,I (2320), Khanty–Mansiysk RUS, 2011.

3.a3 Nc6 4.d4 a6 5.Bf4 Bg4 6.e3 Bf3 (6...Nh5 7.h3 Bf3 8.Qf3 Nf4 9.Qf4=) 7.Qf3+= e6 8.c4 dc4 9.Bc4 b5?? (better is 9...Nd4 10.ed4 Qd4 11.Qb7 Rd8=) 10.Qc6+– Qd7 (10...Nd7 11.Bd3 Bd6 12.Bd6 cd6 13.Qd6 Rc8+–) 11.Qa8 Ke7 (11...Qd8 12.Qc6 Qd7 13.Qa8 Qd8 14.Qd8 Kd8 15.Bd3+–) 12.Be2 Ne4 (12...Nd5 13.Bg3+–) 13.Qe4 (13...Qd5 14.Qd5 ed5 15.Nd2+–) 1–0. kamret (2170) – twlssn03, GameColony.com, 2003.

3.a3 h6 4.d3 Bf5 5.Nbd2 e6 6.e4 (better is 6.Bb2!?=) 6...de4–/+ 7.de4 Bh7 (7...Ne4 8.Bb2–/+) 8.Bb2 (8.Bd3 a5 9.b5 Bd6+=) 8...Be7 (better is 8...Ne4!? 9.Be2 Nd2 10.Nd2 Nc6=+) 9.Bd3+= 0-0 10.0-0 Nbd7 11.e5 Nd5 12.Bh7 Kh7 13.c4 Nf4 14.Qc2 Kg8 15.Qe4 Ng6 16.Qb7 Nde5 17.Ne5 Ne5 18.Be5 Qd2 19.Qc7 Bg5 20.Rad1 Qb2?? (better is 20...Qa2+/–) 1–0. arkadeles (2060) – Minstrel, ChessWorld.net, 2003.

3.Ba3 e6 4.c4 (4.e3 Bd6=+) 4...dc4–/+ 5.e3 (5.b5 c6 6.Bf8 Rf8=+) 5...Nc6 (5...b5 6.d3–/+) 6.Bc4 (6.b5 Nb4=+) 6...Bb4 (6...a6 7.Qa4 Bd7 8.Qb3=+) 7.Bb5 (7.Bb4 Nb4 8.d4 0-0=+) 7...Ba3 (7...a5 8.Bc6 bc6 9.Qc2=+) 8.Bc6 bc6 9.Na3 Qd3 (9...Qd5 10.Qc2=+) 10.Nb1 (10.Qc2 Qc2 11.Nc2 c5=+) 10...0-0 11.Nc3 (11.Qe2 Qd6 12.Nc3=+) 11...Qc4 (11...Ba6!?=+) 12.Rc1 (12.Qa4 Qc5=) 12...Nd5 (12...c5 13.Qa4 Qa4 14.Na4=) 13.a4 (13.Nd5 Qd5 14.Qc2 Ba6=) 13...Nb4 14.Ne5 Nd3 (14...Qh4 15.0-0=) 15.Nd3 Qd3 16.Ne2 Bb7 (16...Rd8 17.Qc2=+) 17.Rb1 (17.Rc5!?=) 17...Ba6 (17...Rab8 18.f3–/+) 18.Rc1=+ Qe4 (18...Qd5 19.f3=+) 19.Nf4 (19.f3 Qh4 20.g3 Qh5=+) 19...e5–/+ 20.f3 Qb4 (20...Qf5 21.Rc6 ef4 22.Ra6=+) 21.Nh5 (21.Nh3 c5–/+) 21...c5 22.f4 (better 22.Rc3–/+) 22...f6?? (22...Rad8 23.Rc3–/+) 23.fe5?? (23.Qg4 Rf7 24.Ng7 Rg7 25.Qe6 Kh8 26.Qa6 ef4 27.Qf6 fe3 28.0-0 Qd2 29.g3–+) 23...fe5–/+ 24.Ng3 c6 (24...Bd3 25.Qh5 Rae8 26.Qd1–+) 25.Rc3 (25.Qc2 Rad8 26.Qc3 Rf6–/+) 25...e4 (25...Rab8 26.e4–+) 26.Qa1 (26.Qb3 Qb3 27.Rb3 Rfb8 28.Rb8 Rb8–+) 26...Bd3 (26...Rab8 27.Qa2 Kh8 28.Ne2–+) 27.Qd1 (27.Nh5 Rf7–/+) 27...c4 28.Rc1 (28.Nh5 Rab8 29.Rc1 Qa5–+) 28...a5 (28...Qe7 29.Qg4–+) 29.Ne2 Be2 (29...Rad8 30.Nc3 Qe7 31.Qg4–+) 30.Ke2 (30.Qe2!? Rab8 31.Rf1 Rf1 32.Qf1 Qa4 33.Qe2–+) 30...Rad8 31.Rc3 Qb2 (31...Rd5 32.Qc2 Qd6 33.Ke1–+) 32.Ke1 (better 32.Rc2 Qf6 33.Qe1–+) 32...Qb4?? (better 32...Qc3! 33.dc3 Rd1 34.Kd1 Rf2–+) 33.Qc2 The isolani on c4 becomes a target (33.Ke2 Rd3 34.Qc1–+) 33...Rb8 (33...Qd6 34.Rf1–/+) 34.Rc4 (34.Ke2 Qc5 35.Qe4 Rb4–/+) 34...Qb1 35.Qd1 Qd1 (35...Qa2 36.Rc1–/+) 36.Kd1 Rb4 (36...Rf2 37.Kc2 Rd8 38.Rd1 Rg2 39.Re4 Rh2 40.Rc4=+) 37.Rc6 (37.Rb4 ab4 38.Kc2 Rf2=) 37...Ra4 (37...Rf2 38.Rc8 Kf7 39.Rg1=+) 38.Ke2 Ra8 (38...Rd8 39.Rhc1=+) 39.Rd1 (39.Rhc1 Rd8=) 39...h5 (39...Rb4 40.Rc7=+) 40.Rc5 (40.Rc7 Rd8=) 40...g6 (40...Rb4 41.Rh5 a4 42.Ra1=) 41.Rc6 Kg7 42.Rf1 (42.Rb1 Rg8=) 42...Kh6 (42...Rd8 43.Rff6=) 43.Rff6+= Rg8 44.Rce6 (44.h4 Kh7+=) 44...Ra2 45.Re4 a4 (45...Rd8 46.Rd4 Rd4 47.ed4+=) 46.Ra6 (46.Rd4 Ra8+–) 46...a3?? (46...Rd8 47.Rd4 (worse 47.Rea4 Rdd2 48.Kf3 Rf2 49.Ke4 Ra4 50.Ra4 Rg2–/+) 47...Rd4 48.ed4+=) 47.Rea4 (better 47.Rd4 Ra1 48.h4+–) 47...Rd8= 48.Rd4 (worse 48.Ra3 Rdd2 49.Kf3 Rf2 50.Ke4 Ra3 51.Ra3 Rg2–/+) 48...Rd4 49.ed4 The passed pawn on d4 quickly leads to threats 49...Kg5 50.d5 Kf5 51.d6 Ke6 52.g3 (52.h4 Ra1+=) 52...Ra1 53.Kf3 (53.Kd3 g5=) 53...a2 54.Kg2 (54.Ke2 g5=) 54...g5 55.h3 g4 56.h4 Kd7 57.Kf2 Ke6 58.d4?? (better 58.Ke2=) 58...Rh1–+ 59.d5 Kd7 (59...Kd5?? 60.d7 Ke4 61.d8Q+–) 60.Ra7 Kd6 61.Ra2 Rh2 62.Ke3 Ra2 63.Kf4 Ra3 (63...Ra5!? 64.Ke3 Kd5 65.Kf4–+) 64.Kg5 Rg3 65.Kh5 Rg2 66.Kg5 g3 67.Kf4 Rg1 68.h5 Kd5 69.h6 Rf1 70.Kg3 Rh1 71.Kf4 Rh6 72.Ke3 Rh3 73.Kd2 (73.Kf4–+) 73...Ke4 74.Kc2 Kd4 75.Kb2 (75.Kd2 Rh2 76.Ke1 Rb2 77.Kd1 Kd3 78.Ke1 Ra2 79.Kf1 Ke3 80.Kg1 Kf3 81.Kh1 Kg3 82.Kg1 Ra1) 75...Rc3 76.Kb1 Kd3 77.Kb2 Kd2 78.Kb1 Rb3 79.Ka1 Ra3 (79...Kd3 80.Ka2 Kc2 81.Ka1 Ra3) 80.Kb2 Rc3 (80...Re3 81.Kb1 Kc3 82.Ka2 Re1 83.Ka3 Ra1) 81.Kb1 Kd3 (81...Rc2 82.Ka1 Kc3 83.Kb1 Kb3 84.Ka1 Rc1) 82.Kb2 Kc4 83.Ka2 Rc2 84.Ka1 Kd3 (84...Kc3 85.Kb1 Kb3 86.Ka1 Rc1) 85.Kb1 Rc3 (85...Kc3 86.Ka1 Rc1 87.Ka2 Rd1 88.Ka3 Ra1) ½–½. Skaki_119 – Crux_040b, 2000.

3.a4 a6 4.e3 e6 5.Ba3 Nbd7 (5...Bd6 6.d4=+) 6.c4 (6.d4 Bd6=) 6...c5 (6...dc4 7.Bc4 Nb6 8.Be2=) 7.bc5= Bc5 8.Qc2 (8.Bc5 Nc5 9.a5 0-0=) 8...Qa5 9.Be2 Nb6 Exerts pressure on the isolated pawn (9...b6 10.Bc5 Nc5 11.Qc3=) 10.Bc5+= Qc5 11.0-0 dc4 12.a5 Nbd5 13.d4 (worse 13.Qc4 Qc4 14.Bc4 b5 15.ab6 Nb6=) 13...Qc7 14.Bc4 0-0 15.Rc1 Bd7 16.e4 (16.Ne5 Rfc8+=) 16...Ne7 (16...b5 17.ab6 Nb6 18.Nbd2+= (worse 18.Ba6 Qc2 19.Rc2 Ba4 20.Ra4 Na4=+)) 17.Nbd2 (17.e5 Nfd5+=) 17...Qf4+= 18.g3 Qh6 19.Nb3 Bc6 20.Nc5 Nd7 (20...Rfd8 21.Qd3+=) 21.Nd7+/- Bd7 22.Qb3 Rab8 23.Ne5 Bc6 24.d5 ed5 25.ed5 Be8 26.Re1 Qd6 27.Rad1 (27.Qa3!? Qd8 28.d6+/-) 27...b5+= 28.Bf1 Rd8 29.Bg2 Ng6 30.Nc6 (30.Ng6 Qg6 31.Re7 Rd6+=) 30...Bc6= 31.dc6 Qc7 32.Qc3 Ne7 (32...Rd1 33.Rd1 Re8 34.Rd7+=) 33.Rc1 (33.Rd8!? Rd8 34.Qe3+-) 33...Nc8= 34.Bh3 Nd6 35.Qc5 Rfe8?? (better 35...Rb8+=) 36.Qb6+- Re7 37.Bd7 (37.Re7 Qe7 38.c7 Rf8+-) 37...Rdd7? (37...Qb6 38.ab6 Red7 39.cd7 Kf8+-) 38.cd7 Qd7 39.Re7 (better 39.Red1!? g6 40.Rd6 Qa7+-) 39...Qe7 40.Rd1 Ne8 41.Qa6 b4 42.Qc4 g6 (42...h6 43.Rb1 Qd7 44.Qb4+-) 43.a6 Kg7 (43...h6+-) 44.Qd4 Nf6 (44...Qf6+-) 45.a7 Qb7 46.Rb1 b3 47.Rb3! (47.Rb3 Qb3 48.a8Q+-) 1-0. Pang,Yui Kuen (1960) - Wong,Ching Chi (1915), ch-HKG, 2018. (=1.Nf3 d5 2.b4 Nf6 3.a4 a6)

3.a4 Bf5 4.c3 Nbd7 5.Nh4 Bg6 6.Ng6 hg6 7.a5 e5 8.a6 b6 9.Qa4 (9.e3 Qe7=+) 9...Bd6 (9...Ng4 10.Qc6=) 10.Qc6= Rb8 (10...e4 11.d4=) 11.Na3 0-0 (11...Ng4!? 12.Qd5 Qf6= (12...Nh2? 13.g3+–; worse 12...Rh2 13.Rh2 Nh2 14.Nb5+–)) 12.Nb5+– Ra8 13.f3 e4 (13...Re8 14.e4+– (worse 14.Nd6 cd6 15.Rb1 Rc8=)) 14.Nd6+– cd6 15.Qd6 ef3 (15...Rc8 16.e3+–) 16.gf3 Rc8 (16...Re8 17.e3+–) 17.Rg1 (17.e3 Re8+–) 17...Re8 18.e3 Re6 (18...Re5 19.Bb5+–) 19.Qg3 Nh5 20.Qg5 White gets the initiative (20.Qf2 Kf8+–) 20...Qg5 (20...Qc7!? 21.Bb5 Ndf6+–) 21.Rg5+– Re5 (21...Nhf6 22.b5+–) 22.f4 Rg5 23.fg5 Ne5 (23...Nf8 24.Bg2 Rd8 25.b5+–) 24.Bg2 Nd3 (24...Rd8 25.b5+–) 25.Ke2 Nc1 26.Rc1 Re8 27.Kd3 (27.Kf2 Rd8+–) 27...Re5 28.h4 Ng3 29.c4 Nf5 (29...dc4 30.Rc4 Kf8 31.Bh3+–) 30.Bd5 Nh4 31.e4 Nf3 (31...Re7 32.Rf1 Rc7+–) 32.Ke3 Ng5 33.Kf4 (33.Kf4 Rd5 34.cd5 Nh3 35.Ke3+–) 1–0. marekt – guest, internet, 2007.

3.a4 Bg4 4.b5 Bf3 5.gf3 c6 6.Rg1 g6 7.Bb2 Bg7 8.e4 de4 9.fe4 Nbd7 10.f3 e6 11.bc6 bc6 12.Qe2 Qb6 13.Bf6 Bf6 14.Nc3 Bc3 15.dc3 Qg1 16.Qc4 0-0 17.0-0-0 Qe3 18.Kb2 Rab8 19.Ka2 Nb6 20.Qc6 Rfc8 21.Qb5 Rc3 22.a5 Rc2 23.Kb1 Nd7 24.Kc2 Rb5 25.Bb5 Nc5 26.Bd3 Nd3 27.Rd3 Qe2 28.Kc3 Qe1 29.Kc4 Qc1 30.Kb5 Qa1 31.Rd8 Kg7 32.Ra8 Qb2 33.Ka6 Qb4 34.Ra7 Qc4 35.Kb7 Qb4 36.Ka8 Qc5 37.a6 Qc8 Normal 0-1. Baluk (2260) - Petrochiant (2115), Rated Bullet game, lichess.org, 2015. (=1.Nf3 d5 2.b4 Nf6)

3.b5 Bg4 4.Ne5 (4.Bb2 e6=+) 4...Bf5 5.e3 e6 (5...Nbd7 6.Nd7 Qd7 7.Bb2=+) 6.g4 Bg6 (6...Be4 7.f3 Bd6 8.d4=+) 7.d3 (7.Bb2 Nbd7=+) 7...Bd6 (7...a6 8.Ng6 hg6 9.ba6 Na6 10.Bb2=+) 8.Ng6 (8.Bb2 Be5 9.Be5 Nbd7=) 8...hg6 9.g5 (9.f4 c6=+) 9...Nh5 10.h4 c6 (10...Qd7 11.d4=+) 11.a4 (11.d4 a6 12.ba6 b5=+) 11...cb5 (11...a6 12.bc6 Nc6 13.Nd2=+) 12.ab5= Qb6 (12...Nd7 13.Ba3 Bc7 14.Be2=) 13.d4 a5 (13...Qc7 14.Ba3=) 14.c4 (14.Ra4 Nd7=) 14...dc4 15.Bc4 Qc7 16.Be2 (16.Nd2 Bb4 17.Be2 Nd7=) 16...Nd7 17.Bb2 (17.Ba3 e5=) 17...Bb4 (17...Nb6 18.Ba3=) 18.Nd2 Rd8 (18...Qd6 19.Bf3 Ra7 20.Qc1+=) 19.Rc1 Qb8 (19...Qd6 20.Bf3 Qb6 21.Bc3 Qb5 22.Bb4 ab4 23.Rc7+=) 20.Rc2 (20.Bc3 Bc3 21.Rc3 e5+=) 20...Nb6= 21.Bf3 a4 (21...Nd5 22.Rc1=) 22.Qc1 (22.Be4 Rc8=) 22...0-0 (22...Nd5 23.Bd5 ed5 24.Bc3=) 23.0-0 (23.Ba3 Ba3 24.Qa3 e5 25.de5 Qe5=) 23...Rc8= 24.Nb1 (24.Ne4 Rc2 25.Qc2 Rc8=) 24...Bd6 (24...Rc2 25.Qc2 Rc8 26.Qe2=) 25.Nc3 Rc7 (25...e5 26.de5 Be5 27.Rd1=) 26.Bg2 (26.Ba3 Ba3 27.Qa3 Rfc8+=) 26...Qd8 (26...Rfc8 27.Ba3 Ba3 28.Qa3+=) 27.Ba3 Ba3 28.Qa3 Qb8 (28...Qd7!?=) 29.Be4+– Rc4 (29...Rfc8 30.Rfc1 Qa7 31.Bd3+=) 30.Bd3 Rcc8 (30...Rc7 31.Na4 Rc2 32.Bc2 Na4 33.Qa4+–) 31.Ra1 (31.Na4 Rc2 32.Bc2 Na4 33.Qa4 Ng3+–) 31...Nc4 (31...e5 32.Na4 Rc2 33.Bc2 Na4 34.Qa4 (34.Ba4?! ed4 35.Rd1 de3 36.Qe3 Re8+=) 34...ed4 35.Qd4+–) 32.Qc1 (worse 32.Qa4 Ne3 33.fe3 Qg3 34.Kf1 Qf3 35.Rf2 Ng3 36.Ke1 Qe3 37.Ne2 Qd3=+) 32...a3 (32...Nb6 33.Na4 Nd5 34.Bc4+–) 33.Bc4 (33.Na4 Nd6+–) 33...Rc4 34.Ra3 Rfc8 (34...Qd6 35.Nb1 Rb4 36.Rb2+–) 35.Ra4 Qc7 36.Rc4 Qc4 37.Qf1 Qb3 38.Qd3 Kh7 39.Rc1 Kg8 (39...Qa3 40.Qd2+–) 40.Qd2 (40.Kf1 Qb4+–) 40...Rc4 (40...Kh7 41.Kf1+–) 41.Kg2 (41.Kf1 Qb4+–) 41...Rc7 42.Kh1 (42.Kf1 Qa3+–) 42...Rc4 43.b6 (43.Qd3!?+–) 43...Qb6= 44.Ne4 Qc6 (44...Rc6 45.Kg1=) 45.Rc4 Qc4 (worse 45...Qe4 46.Kg1+–) 46.Ng3 (46.Kg1!?=) 46...Ng3=+ 47.fg3 b5 48.Kg2 b4 49.e4? (better 49.Kf2–/+) 49...b3 50.Kf3 (50.Kf2 Qa4 51.Ke3 Qa1–+) 50...Qc2 51.Ke3 f5 (better 51...Qa2 52.d5 ed5–+) 52.gf6?? (52.Qc2 bc2 53.Kd2 fe4 54.Kc2 Kf7+–) 52...gf6? (better 52...Qb1 53.f7 Kf7=) 53.Qc2+– bc2 54.Kd2 Kf7 55.Kc2 Ke7 (55...f5 56.Kd3+–) 56.e5 f5 57.Kd3 Kd7 58.Kc4 f4 59.gf4 Ke7 60.d5 ed5 61.Kd5 Kd7 62.e6 Ke7 63.h5 (better 63.Ke5 Kf8 64.Kf6+–) 63...gh5 64.f5 h4 65.Ke5 (65.Ke4 h3 66.Kf3+–) 65...h3= 66.f6 Kd8?? (better 66...Kf8 67.Kd6 h2=) 67.Kd6+– Ke8 68.f7 Kf8 69.Kd7 Kg7 (69...h2 70.e7 Kf7 71.e8Q Kf6 72.Qe6 Kg5 73.Qe5 Kg4 74.Qh2 Kf3 75.Qd2 Kg3 76.Qe3 Kh2 77.Qf2 Kh1 78.Qf3 Kh2 79.Ke6 Kg1 80.Ke5 Kh2 81.Kf4 Kg1 82.Qd1 Kf2 83.Qc2 Ke1 84.Ke3 Kf1 85.Qf2) 70.e7 (better 70.Ke8 Kg6 71.f8Q+–) 70...h2 (70...Kf7 71.e8Q Kf6 72.Qe6 Kg5 73.Qh3 Kf4+–) 71.f8Q Kg6 72.e8Q Kg5 73.Qe5 Kg4 (73...Kh4 74.Qff4 Kh3 75.Qg3) 74.Qff5 Kh4 75.Qh2 1–0. SSEChess2045 – Bionic401, 2000. (=1.Nf3 d5 2.b4 Nf6)

3.c3 a5 4.Qa4 Bd7 5.b5 c6 (5...Bf5 6.d3=) 6.e3= e6 7.Ba3 Ba3 8.Na3 0-0 9.Be2 b6 (9...Ne4 10.0-0=) 10.0-0 cb5 11.Nb5 Na6 (11...Bb5 12.Qb5 Nbd7 13.Rfc1=) 12.Qc2 (12.Rab1 Nc5 13.Qh4 Nce4=) 12...Nc5 13.Ne5 h6 (13...Bb5 14.Bb5 Rc8 15.Rab1=) 14.Rab1 Rb8 (14...Rc8 15.Nd4=) 15.d4 Na6 (15...Nb7 16.Rfc1+–) 16.Nd6+– Nc7 17.c4 dc4 18.Ndc4 The backward pawn on b6 becomes a target 18...Ncd5 19.Rfc1 Qe7 (19...b5 20.Nd7 Nd7 21.Nd6+=) 20.Bf3+– Rfc8 21.Qd2 a4 (21...Qd8!?+–) 22.Bd5+– Nd5 23.e4 Nf6 24.Nb6 Rc1 25.Qc1 Rb7? (better 25...Be8 26.Nd5 Qa3 27.Nf6 gf6+–) 26.Ned7 (26.Nbd7?! Rb1 27.Nf6 gf6 28.Qb1 fe5 29.Qb8 Kh7 30.Qe5 Qb4+–) 26...Nd7 (26...Rd7 27.Nd7 Qd7 28.Rb8 Kh7 29.Qb1+–) 27.Nd5 (27.Nd5 ed5 28.Rb7+–; 27.Na4?! Rb4 28.Qd1 e5+–) 1–0. Cirulis,Ilmars (1775) – Murray,Findlay (1750), FICGS, 2008.

3.c3 Qd6 4.Ba3 (4.d4 Nbd7+=) 4...a5 (4...Bg4 5.d4+=) 5.ba5= Ng4?? (better is 5...c5=) 6.Bd6+– cd6 (6...ed6 7.e3+–) 7.Qa4 (7.e3 Ra5 8.Qb3 Nf6+–) 7...Nc6 8.Nd4 (8.e3 Ra5 9.Qb3 e5+–) 8...Ra5 9.Qb3 e5 (9...Nge5 10.e3+–) 10.Nf3 (better is 10.Nc6!? bc6 11.Qb8 Kd7+–) 10...Be6 (10...Be7 11.e3+–) 11.Qb7 Nd8 (11...Bd7 12.e3 Be7 13.d4+–) 12.Qb6 Rc5 13.Ng5 (13.e3 Bd7+–) 13...Rc6 (13...Bd7 14.e3+–) 14.Qb8 (better is 14.Qb3 Be7 15.Ne6 fe6+–) 14...Bf5 (14...Be7 15.Ne6 fe6 16.Qa7+–) 15.h3 (better is 15.e4!? Bd7 16.Bb5 Rc5 17.Nf7 Bb5 18.Nd8 Bd7 19.Nc6 Kf7+–) 15...Bc8 (15...Rc8 16.Qb5 Bd7 17.Qd5 Nf6+–) 16.hg4 1–0. Souquiere,Florence – Bori,Aliyu, FICGS, 2006. (=1.Nf3 d5 2.b4 Nf6)

3.c3 e6 4.d4 Nbd7 (4...Bd6 5.Ne5=+) 5.e3 Bd6 6.Qb3 (6.Bd3 a5=+) 6...0-0 7.Bb2 (7.c4 a5=+) 7...c6 (7...a5 8.Bb5–/+) 8.Nbd2 (8.c4 a5=+) 8...Qe7 9.Bd3 e5 10.de5 (10.0-0 e4 11.Ne4 de4–+ (11...Ne4?! 12.c4–+)) 10...Ne5= 11.Ne5 Be5 12.0-0 Bg4 (12...Be6 13.Nf3 Bd6 14.c4=) 13.f3 (13.c4 Rfd8=) 13...Be6 (13...Bd7 14.f4 Bd6 15.Rae1–/+) 14.Qc2 (14.c4 dc4 15.Bc4 Bb2 16.Qb2 Bc4 17.Nc4 Nd5=+) 14...Rfe8 15.a3 Rad8 16.Nb3 b6 17.Rad1 c5 18.Bb5 Bd7 19.Bd7 Rd7 20.Bc1 Bd6 21.bc5 Bc5 22.Nc5=+ Qc5 23.Rd3 Rc7 24.a4 Rec8 25.Bd2 Qa3 (26.c4 Qe7–/+; 25...Qc4 26.Rd1–/+) 0–1. Moeckel,Jean – Milde,Lars, TT05 TSC, 2003.

3.c3 Bf5 4.Na3 Nc6 (4...e6 5.d3=+) 5.Qa4 a6 6.Ne5 b5 (6...Bd7!? 7.Nd7 Qd7=) 7.Nc6 (better is 7.Nb5 Bd7 8.Nd7 Qd7 9.e3+/–) 7...Qd6?? (7...ba4 8.Nd8 Rd8 9.d4=) 8.Qa5 (better is 8.Nb5 Qd7 9.e4+–) 8...Qc6=+ 9.g3 (9.e3 Rb8=+) 9...e5–/+ 10.h3 (10.Bg2 Bd6–/+) 10...d4 11.f3 (11.Rh2 dc3 12.Bg2 e4–+) 11...dc3–+ 12.d3 (12.Bg2 cd2 13.Bd2 Rd8–+) 12...Nd5 (12...Qb6!? 13.Qb6 cb6 14.Nc2–+) 13.e4 (13...Bb4 14.ed5–+). cawander – dedektor (1650), net–chess.com, 2003.

3.Nc3 Nbd7 4.e3 e5 5.a3 a5 6.b5 Bd6 7.Be2 0-0 8.0-0 Qe7 9.Bb2 h6 (9...c5 10.Na4=+) 10.d3 b6 11.h3 (11.Ne1 Bb7=+) 11...Bb7 12.Na4 Rfe8 13.Qd2 c5 14.bc6 Bc6 15.Nc3 d4 (15...b5 16.d4 e4 17.Nh4=+) 16.Nd1 Bc5 17.c3 (17.Re1 Qd6=+) 17...de3 18.Ne3 Be3 19.fe3. Inving,Yugi – Pech,Jaroslav, FICGS, 2008.

3.c4 Bf5 4.cd5 (4.Qa4 Qd7 5.b5 d4=) 4...Nd5 5.a3 Nf6 (5...Qd6 6.Bb2=) 6.Nc3= e6 (6...Nc6 7.Qa4 a6 8.Bb2=) 7.d4 (7.Nh4 Bd6+=) 7...Nbd7 (7...Nd5 8.Qb3 Nc3 9.Qc3=) 8.Bg5 (8.Nh4 a5 9.b5 Be4=) 8...Be7 (8...h6 9.Bd2=+) 9.g3 (9.e3 a5 10.b5 Nd5 11.Nd5 ed5=) 9...Ne4 (9...a5 10.ba5 0-0 11.Bg2=+) 10.Be7= Qe7 11.Ne4 Be4 12.Bg2 0-0 (12...a5 13.0-0=) 13.0-0 a5 14.b5 (14.Qd2 ab4 15.ab4 h6=) 14...c6 (14...Rfd8 15.e3=) 15.bc6 Bc6 (15...bc6 16.Qd2=) 16.Qb1 (16.Qd3 Rac8+=) 16...f5 (16...Rac8 17.Rc1=) 17.e3 (17.Rc1 Qd6+=) 17...Rfb8 (17...Be4 18.Qb2+=) 18.Rc1 Bd5 (18...Rc8 19.a4+=) 19.a4 (19.Qb5 Bc6 20.Qc4 Rf8+=) 19...Bc6 (better 19...Rc8+=) 20.Rc2 (20.Qb3 Ra6+=; 20.Nh4 g6+–) 20...Qd6 (better 20...Be4!?–/+; better 20...Be4!?=+) 21.Qf1 (21.Qb3 Ra6+=) 21...Rc8 (21...Be4 22.Rcc1+=) 22.Ne1 (22.Rac1 Nb6+–) 22...Rc7 (22...Bg2 23.Rc8 (23.Kg2?? Rc2 24.Nc2 Qc6 25.d5 Qc2–+; 23.Qg2?! Rc2 24.Nc2 Rc8=) 23...Rc8 24.Ng2=) 23.Bc6+= Rc6 24.Rc6 Qc6 (24...bc6 25.Rc1+=) 25.Nd3 b5 26.Rc1 Qb7 27.Nf4 ba4 28.Qc4 Nf8 (28...Qe4 29.Qb5 (worse 29.Qa4 Ne5=+) 29...Nf6 30.Qa4+=) 29.Qa4 (29.Ne6 Qf7 30.Nf8 Qc4 31.Rc4 Kf8 32.Ra4 Ke7+–; 29.Ne6 Qf7 30.Qc6 Qe8 31.Qe8 Re8+–) 29...g5 (29...Qd7 30.Qa3+–) 30.Nd3+– h5 (30...Nd7 31.h3+–) 31.Qd1 (31.Ne5 h4+–) 31...g4 32.Rb1 (32.Qa4 Nh7+=) 32...Qc6+= 33.Ne5 (33.Nf4 a4+–) 33...Qd6 (33...Qe4 34.Qc1 a4 35.Ra1+=) 34.Qa4 (34.Rb7 Qd5 35.Rc7 a4+–) 34...Rb8 (34...Nh7 35.Rb5+–) 35.Ra1 (35.Rb8 Qb8 36.Qa5 Nd7 37.Nd7 Qb1 38.Kg2 Qb7 39.Kf1 Qd7+–) 35...Qd5 36.Nc6 (36.Qc2 Rb7+–) 36...Rb7 37.Rc1 (37.Na5 Ra7+–) 37...h4 (37...Rc7 38.Rc5 Qe4 39.Qb5+=) 38.gh4 (38.Na5 h3 39.f3 Qf3–+; 38.Qa5? Qc6 39.Qa3 Qd7 40.gh4 Ng6–+; 38.Na5? h3 39.f3 Rb4–+) 38...Ng6 39.Qa5 (worse 39.Na5 Nh4 40.Qe8 Kg7+=) 39...Qa5 40.Na5 Rb5 41.h5 Nh4 (41...Nf4!? 42.Ra1 Nh5+–) 42.Nc4+– Kg7 (42...Nf3 43.Kg2 f4 44.ef4 Nd4 45.Ne3 Rh5 46.Ng4+–) 43.h3! gh3 (43...Kh6 44.Ne5+–) 44.Kh2 Kh6 (44...f4 45.Kh3 Nf5 46.ef4+–) 45.Kh3 (better 45.Ne5!? Kh5 46.Rc7+–) 45...Kh5+– 46.Ne5 (46.Kg3 Ng6+–) 46...Ng6 47.Nd3 e5? (better 47...Rb6+–) 48.Rc5+– Rc5 49.dc5 (49.Nc5?! ed4 50.ed4 Nf4 51.Kg3 Ne2 52.Kf3 Nd4 53.Kf4 Kg6=; 49.Nc5?! ed4 50.ed4 Nf4 51.Kg3 Ne2 52.Kf3 Nd4 53.Kf4 Kg6=) 49...Kg5 (49...f4 50.e4 Kg5 51.c6+–) 50.Ne5! Ne7 (50...Ne5 51.f4 Double attack (51.f4 Decoy)) 51.Nd3 Kf6 52.Kg3 Ke6 (52...Nd5 53.Kf3+–) 53.f3 (53.Nb4 Ke5+–; 53.Kf4 Kd5+–) 53...Nc8 (53...Kd5 54.Kf4+–; 53...Kf6 54.e4+–) 54.Kh4 (54.Kf4 Kf6+–) 54...Na7 (54...Kd5 55.Kg5 Kc4 56.Ne5 (56.Kf5 Kd3 57.Ke5 Kc4=) 56...Kc5 57.Kf5+–) 55.Kg5 Nb5 (55...Nc6 56.f4+–) 56.Nb4 Ke5 (56...Na3+–; 56...Nc7+–) 57.Nc6 Kd5 58.Ne7 (better 58.Nd4 Na7 59.c6 f4 60.Kf4 Nc8+–; better 58.Nd4!? Na3 59.c6 Nc4+–) 58...Kc5 59.Nf5 Nc3 (59...Nc7+–) 60.e4 1–0. Ivanets,Vladimir (2290) – Minz,Michael (2175), EU–ch Seniors, 2005.

3.c4 g6 4.e3 Bg7 5.Bb2 0-0 6.d4 Bf5 7.Nc3 c6 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 c6 6.d4 d5 7.Nc3 Bf5).

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

3.e3 c5 4.b5 Bg4 5.Be2 e6 6.0-0 Bd6 7.Bb2 c4 8.a4 Nbd7 9.Nc3 Qc7 10.h3 Bh5 11.Ba3 Ba3 12.Ra3 Qd6 13.Ra1 Bf3 14.Bf3 Ne5 15.Be2 Rc8 16.f4 Ng6 17.Bf3 Qc5 18.Kh1 Nh4 19.d4?? Qe7?? 20.Be2 Qb4 21.Qe1 Nf5 22.Nd5?? Nd5–+ 23.e4 Qe1 24.Rae1 Ng3 (25.Kg1 Nc3–+) 0–1. dusterstar – toto (1730), internet, 2007.

3.e3 Bd7 4.a3 g6 5.Bb2 Bg7 6.Be2 0-0 7.0-0 a6 (7...Nc6 8.Nc3=) 8.c4= dc4 9.Bc4 b5 (9...Nc6 10.d4=) 10.Bb3+= Nc6 11.Ng5 (11.d4!?+=) 11...a5+= 12.Nf7? (better is 12.Nc3+=) 12...Rf7–+ 13.Bf7 Kf7 14.Qb3 (better is 14.Nc3–+) 14...Be6 15.Qc2 Qd6 (15...Bc4 16.ba5 Na5 17.d4–+) 16.Rc1 (16.Bf6 Bf6 (16...Kf6?! 17.Nc3 Bf5 18.Qb3–/+; 16...ef6?! 17.Rc1 f5 18.d4–/+) 17.Nc3 ab4–+) 16...Ng4 17.g3? (17.f4 Bb2 18.Qb2 ab4 19.h3–+) 17...Nce5 18.Be5 Ne5 (18...Be5?! 19.d4 ab4 20.Nd2–/+; 18...Qe5?! 19.Nc3–+) 19.d4 (19.Nc3 Nf3 20.Kg2 Nd2–+) 19...Nf3 20.Kg2 Bd5 21.e4 (21.Qc7 Nd4 22.e4 Be4 23.f3 Bf3 24.Kf2 Qf6–+) 21...Nd4 22.Qd3 Bc4 23.Rc4 bc4 24.Qc4 Qe6 25.Nd2 (25.Qe6 Ne6 26.Ra2 ab4–+) 25...Qc4 26.Nc4 ab4 0–1. ovid7 (1785) – drengur1 (2025), gameknot.com, 2014.

3.Ne5 Bf5 4.d3 (4.Bb2 e6=+) 4...h6 (4...Qd6 5.Bb2–/+) 5.Bf4 g5 6.Bc1 (6.Be3 d4 7.Bd2 Nbd7 8.Nd7 Bd7=+) 6...e6 (6...Qd6 7.Bb2–/+) 7.a3=+ Nc6 (7...Nbd7 8.Nd7 Qd7 9.Bb2=+) 8.Nc6= bc6 9.Bb2 Bg7 10.g3 (10.Nd2 0-0=) 10...0-0 11.h4 (11.f3 d4=) 11...gh4 (better is 11...g4!?=+) 12.Rh4+= Qd6 13.e4 (13.Bg2!?+/–) 13...de4= 14.Bf6? (better is 14.Nc3 ed3 15.Bd3 Bd3 16.Qd3 Qe5 17.Qe2 Qe2 18.Ke2=) 14...Bf6–+ 15.Rh6?? Bg7 16.Qd2 Bh6 17.Qh6–/+ ed3 18.Qg5 Bg6 19.Bd3 Kg7 20.Kd2 Qd4–+ 21.Nc3 Qf2 22.Ne2 Qf6 23.Qf6 Kf6 24.Rf1 Kg5 25.c4? Rad8 26.Rf3 Kg4 27.Rf4 Kh3 28.Rh4 Kg2 29.Rd4 Rd4 30.Nd4 Bd3 31.Kd3 Rd8 32.Kc3 Rd4 33.Kd4 f6 34.g4 Kf3 35.Kc5 Kg4 36.Kc6 f5 37.Kc7 f4 38.c5 f3 39.c6 f2 40.Kb8 f1Q 41.c7 Qf8 42.c8Q Qc8 43.Kc8 e5 44.b5 e4 45.Kb8 e3 46.Ka7 e2 47.b6 e1Q 48.b7 Qa5 49.Kb8 Qa3 50.Kc8 Qf8 51.Kc7 Qe7 52.Kb6 Qb4 53.Ka7 Qa5 54.Kb8 Kf5 55.Kc8 Qc5 56.Kd8 Qc6 57.Ke7?? Qb7 58.Kd6–+ Qb5 59.Ke7 Qe5 60.Kd7 Kf6 61.Kc6–+ Ke6 62.Kb6 Kd6 63.Kb7 Kd7 64.Kb6 Qd5 65.Ka6 Kc7 66.Ka7 Qa5 (66...Qb7) 0–1. arian1230 – I need chocolate..., ChessWorld.net, 2005.

3.g3 e5 4.Ne5 Bb4 (4...Bd6 5.Nd3=) 5.Bg2= 0-0 (5...Nc6 6.Nd3=) 6.0-0 (6.Nd3 Nc6=) 6...Nbd7 (6...Nc6 7.Nd3=) 7.Nf3 (7.Nd3 Be7=) 7...Nb6 8.c3 (8.a3 Ba5=) 8...Bd6 9.d3 Re8 (9...Bd7 10.Nbd2=+) 10.h3 (10.Nbd2 Bg4=+) 10...Bf5 (10...Bd7 11.a4 a5 12.Nd4–/+) 11.a4=+ a5 (11...Qc8 12.g4 Bg6=+) 12.Be3 (12.Na3 Qc8=+) 12...c5 (12...Re3!? 13.fe3 Qe7–/+) 13.Nbd2 Nbd7 (13...Bd7 14.Qb3=+) 14.c4 (14.Nh4!? Be6 15.Qc2=) 14...d4=+ 15.Bd4 (15.Bg5!? h6 16.Nh4=+) 15...cd4–/+ 16.Nd4 Bg6 (better 16...Be6!?–/+; 16...Be6!?–/+) 17.Bb7=+ Rb8 (17...Bc5 A) worse 18.Ba8 Bd4 (18...Qa8?! 19.Nb5=) 19.Bf3 Ba1 20.Qa1 Ne5–/+; B) 18.N2b3 Rb8 19.Nc6=+) 18.Nc6 Qc7 19.Nb8 Qb7 (19...Rb8 20.Bg2=+) 20.Nd7 Qd7 21.Kh2 (21.Kg2!?=; 21.Kg2!?=+) 21...Bf5–/+ 22.Nf3 Bh3 23.Rh1 Bg4 (23...Nh5 24.d4 Bc7 25.c5–/+) 24.Kg2 (24.Rb1 g6–/+) 24...Qe6 (24...h5 25.Rb1–/+) 25.e4 (25.Rb1 Bb4–/+) 25...Rb8 (25...Bb4 26.Rb1–/+) 26.Rb1 Bb4 27.Qc2 Qc6 (27...Rd8!?=+; better 27...Re8!?=+) 28.Ne5+= Qc5 (28...Qd6 29.d4 Re8 30.Qb2+=) 29.d4+– Qd4 30.Nc6 Qe4? (better 30...Qd6 31.Nb8 Qb8+=; better 30...Qd6 31.Nb8 Qb8+–) 31.Qe4+– Ne4 32.Nb8 Nd2 33.Rhc1 (33.Rbc1!? Bf3 34.Kh2 Ne4+–) 33...Bf3 34.Kh3 Nb1 35.Rb1 Be4 36.Rc1 ½–½. Lamailloux,Michel – Basmaison,Michel, FRA AJEC/2406 corr, 1994. (=1.Nf3 d5 2.b4 Nf6)

3.h3 Bf5 4.d3 (4.a3 e6=+) 4...b5 (4...e5 5.g4 Be6 6.c3=+) 5.Bf4 (5.g4 Bd7=) 5...Nc6 (5...e6 6.a4 Bb4 7.c3=) 6.a3 Nh5 (6...e6 7.Nc3 a6 8.g4=) 7.Qd2 (7.Bd2 e5=) 7...d4 (7...Nf4 8.Qf4 g6 9.d4=+) 8.g4 Qd5?? (better is 8...Nf4!? 9.Qf4 Be6=) 9.Bg2?? (9.Bc7 Qd7 10.Bh2 Be6 11.gh5 Rc8+–) 9...e5? (better is 9...Nf4 10.Qf4 Bg6+=) 10.Bh2 (10.gf5 Nf4 (< 10...ef4 11.Rg1 Qd8 12.c3+/–) 11.Rh2 Ng2 12.Rg2 0-0-0=+; 10.gh5?! Rd8 11.Nh4 Qd7 12.Nf5 ef4 13.Qf4 Ne7 14.Ne7 Be7+–) 10...Nf4 11.Bf4 ef4 12.Qf4 0-0-0?? 13.Qf5 Qf5 14.gf5 g6 15.f6 Rd6 16.a4 Rf6 17.0-0 Nb4 18.Nd4 Ra6 19.a5 Bc5? 20.Nb5 Nc2 21.Ra2 Nd4 22.Nd4 Bd4 23.Nd2 Bc3 24.Nc4 Re8 25.Rb1 Rf6 26.Rb7 Bd4 27.e3 Be3 28.fe3 Rd8 29.d4 g5 30.Ra7 g4 31.hg4 Rg6 32.Bh3 Kb8 33.Ne5 Ka7 34.Ng6 fg6 35.Bg2 Rc8 36.Bc6 h5 37.gh5 gh5 38.Rb2 Rg8 39.Kh2 Re8 40.Be8 Ka6 41.Rb5 Ka7 42.d5 Ka6 43.Bc6 Ka7 44.e4 (44...Ka6 45.e5 Ka7 46.Kg3 h4 47.Kh4 Ka6 48.Kg5 Ka7 49.e6 Ka6 50.e7 Ka7 51.e8Q Ka6 52.Qa8#) 1–0. dmakaveli – drewbaby, net–chess.com, 2001.

3.h4 a6 4.Bb2 Nc6 5.e3 (5.a3 Bg4=+) 5...e5 (better is 5...Nb4 6.Be2 Bf5–/+) 6.Bd3?? (better is 6.b5 ab5 7.Bb5=) 6...e4–+ (6...Bb4?! 7.Ne5 Ne5 8.Be5=+; 6...Nb4?! 7.Be5 Nd7 8.Bd4–/+) 7.Bf6 Qf6 8.Nd4 Nd4 9.Nc3 ed3 10.ed4 Qd4 11.g3 Bb4 12.Nb1 Qa1 13.cd3 0-0 14.Qb3 c5 15.Kd1 Bg4 16.Kc1 Qd4 0–1. acosta – nbarletta (1720), net–chess.com, 2002.

4.b5 Nbd7 5.d4 =.

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

4.b5 Bf5 5.e3 Nbd7 6.Bb2 e5 7.Ne5+= Ne5 8.Be5 Bd6 9.Bd6 Qd6 10.d4 0-0 11.Bd3 Bg4 12.Qc1 c5 13.bc6 bc6 14.Nc3 Rfe8 15.Na4 Bh5 16.Nc5 Ng4 17.h3 Ne3 18.fe3 (18...Qf4 19.Kd2 Qe3 20.Kc3+–) 1–0. Baer,Werner – Schulz,Hans_Juergen, TT–18.16, 2005.

4.b5 Bg4 5.d4 e6 6.h3 Bf3 7.ef3 Bd6 8.c4 c5 9.bc6 Nc6 10.c5 Bb8 11.Ra2 0-0 12.Bb5 a4 13.0-0 Qa5 14.Rb2 e5 15.Be3 h5 16.Bc6 bc6 17.Rb7 Re8 18.Qd3 ed4 19.Bd4 Be5 20.Nc3 Bd4 21.Qd4 Rab8 22.Rfb1 Re1 23.Re1 Rb7 24.Re3 Qa6 25.g4 (< 25.Na4 Rb1 26.Kh2 Qf1–/+) ½–½. Hansen,Marco (2290) – Boehme,Sebastian (2560), CiF, 2009.

(--> 1.b4 e6 2.a3 Nf6 3.Nf3 d5).

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

4.d4 Bd6 5.Nbd2 Nbd7 (--> 1.b4 e6 2.a3 Nf6 3.Nf3 d5 4.d4 Nbd7 6.Nbd2 Bd6).

4.e3 a5 5.b5 c5 6.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c5 6.Nf3).

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

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

4.Bb2= Nbd7 5.Nh4 Bg6 6.Ng6 hg6 7.e3 e5 8.c4 c6 9.Nc3 Bd6 10.Qb3 d4 11.ed4 ed4 12.Ne2 c5 13.g3 Qe7 14.Bg2+= Rb8 15.Kf1 0-0 16.Re1 Rfe8 17.Qc2 Qd8 18.bc5 Bc5 19.Nd4 Re1 20.Ke1 Ne5 21.Qc3 Qe8 22.Ne2+/– Nc6 23.Kd1 Ne4?? 24.Qg7# 1–0. themonkey (2115) – lunarossa (1810), GameColony.com, 2002.

4.Bb2 e6 5.d3 Be7 (5...c5 6.bc5 Bc5 7.e3+=) 6.g3 (6.Nh4 Bg6=) 6...0-0 7.Bf6 (7.Nh4!?+=) 7...Bf6–/+ (7...gf6?! 8.g4 Bg6 9.h4=) 8.Bg2?? (better is 8.c3–/+) 8...Ba1–+ 9.c3 Nd7 (9...Qf6 10.Qb3 a5 11.ba5 Ra5 12.0-0–+) 10.0-0 (10.Qc1 a5 11.ba5 Qf6–+) 10...c5 11.Nbd2 (11.e4 de4 12.de4 Be4–+) 11...Bc3 12.Nb3 (12.bc5 Nc5 13.Qc2 Bd2 14.Qd2 Rc8–+) 12...cb4 13.Nbd4 Bg4 14.a4 (14.ab4 Bb4 15.Qb1 Qb6–+) 14...e5 (14...Qa5 15.Nb5–+) 15.h3 (15.Nb5 d4–+) 15...Bf3 16.Nf3 e4 17.de4 de4 18.Nh4 Nf6 19.Qd8 Rad8 20.f3 Rfe8 21.a5 Rd2 22.Rc1 Re2 23.Kh2 g5 24.Rd1 gh4 25.Rg1 ef3 26.Rf1 Rg2 0–1. nimzou (1990) – karikal (2350), net–chess.com, 2013. (=1.Nf3 d5 2.b4 Nf6+= 3.a3 Bf5)

4.Bb2 e6 5.Nd4 Bg6 6.e3 c5 7.bc5 Bc5 8.Bb5 Nfd7 (8...Nbd7 9.0-0=+) 9.h4 0-0 10.h5 Bd4 11.ed4 Bf5 12.Bd7 Nd7 13.g4 Be4 14.f3 Bc2 15.Qc2 e5? (better is 15...h6+=) 16.de5+– Ne5 (16...Rc8 17.Qd1+–) 17.Be5 Re8 18.d4 Rc8 19.Nc3 f6 20.f4 fe5 21.fe5 Qg5 22.Qd3 Red8?! (22...Qg4 23.Rd1 Rf8+–) 23.h6 g6 (23...Rc7 24.hg7 Rg7 25.Rg1+–) 24.Qf3 Rf8 25.Qd5 Kh8 (25...Rf7 26.Rf1 Rcf8 27.Qe6 Qh6 28.Ne2+–) 26.Qb7 Rg8 27.Ne2 Rc2 (27...Qg4 28.Qe7 (28.Qa7?! Rc2 29.Qa6 Rf8+–) 28...Rcf8 29.Rg1+–) 28.Qf3 Rgc8 29.Rd1 Qe7 30.Qf6 Qf6 31.ef6 Re8 32.Rh2 Kg8 33.Rf2 Kf7 34.Rb1 Ke6 (34...Rc7+–) 35.f7 Rf8 36.Nf4 Kf7 37.Rb7 Kg8 38.Rg7 Kh8 39.Ng6! hg6 40.Rf8 1–0. b4_player (2180) – Jarem, GameColony.com, 2002.

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

4.Bb2 e6 5.e3 Nbd7 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

4.Bb2 h6 5.e3 Nbd7 6.Bf6 Nf6 7.Bd3 Bd3 8.cd3 c6 9.Nc3 Qc7 10.b5 e5=+ 11.bc6 bc6 12.Rc1 Ba3 13.Nb5+= Bc1?? 14.Nc7+– (14.Nc7 Kd7 15.Na8 Ra8 16.Qc1+–) 1–0. pierre – rorfize, internet, 2010.

4.e3 a6 5.c4 Nbd7 (5...a5 6.Nd4 Bd7 7.Bb2 ab4 8.ab4 Ra1 9.Ba1=) 6.cd5 Nd5 7.d3 Bg6 8.e4 N5f6 9.Be2 e6 10.0-0 Be7 11.Be3 0-0 12.Nbd2 b6 (12...Rc8!?+=) 13.Nd4+/– Bd6 14.Nc6 Qe8 15.Rc1 h6 16.f4 e5 17.Nc4 ef4 18.Nd6 cd6 19.Bf4 (19.Rf4?! Nd5 20.Rf3 Ne3 21.Re3 Ne5 22.Ne5 Qe5=) 19...Ne5 20.Ne5 de5 21.Bh6! Qe7 (21...gh6 22.Rf6 Discovered attack (22.Rf6 Deflection; 22.Rf6 Overloading)) 22.Bg5 Qd6 23.h4 Qd4 24.Kh2 Ne8 (24...Nd7 25.h5 Bh7+–) 25.h5 Bh7 26.Be7 Nd6 (26...Nf6 27.Bf8 Rf8 28.Rc2+–) 27.Rc6 Rfd8 (27...Ne4 28.de4 (28.Bf8?! Nc3 29.Rc3 Qc3+–) 28...Be4 29.Rd6 Qd1 30.Bd1+– (worse is 30.Rdd1 Rfc8+–)) 28.Qc1 Rac8 (28...Ne8 29.h6 b5 30.hg7 Qd7 31.Bd8 Rd8+–) 29.Bd8 Rd8 30.h6 (better is 30.Qg5 Ne8 31.Qe7+–) 30...f5 (30...Bg6+–) 31.Qg5 Rd7 (31...Ne8 32.ef5 Rd6 33.f6 Rf6 34.Rcf6 Qh4 35.Qh4 gf6 36.Rf6 Be4 37.Qg5 Kh8 38.Rf8 Kh7 39.Rf7 Kh8 40.h7 Bh7 41.Qh6 Nf6 42.Qg7) 32.hg7 Nf7 (32...a5 33.Bh5 Qd3 34.Rd1 Qe4 35.Rdd6 Qf4 36.Qf4 Rd6 37.Qc4 Kg7 38.Rd6 Bg8 39.Qc7 Bf7 40.Qf7 Kh8 41.Rd8) 33.Qf6 Rd8 34.Rc7 Nd6 (34...Rd7 35.Rc8 Rd8 36.Bh5 Bg6 37.Bg6 Qg1 38.Kg1 Nd6 39.Rd8 Ne8 40.Re8#) 35.Qd8 1–0. aspasio – noahsark (2395), net–chess.com, 2015.

4.e3 Nbd7 5.c4 (5.Bb2 a5+=) 5...e6 6.Nc3 a5 7.b5 Nb6 8.c5? (better is 8.cd5!? Nbd5 9.Nd5 Qd5 10.Bb2+=) 8...Bc5–+ 9.Be2 0-0 10.0-0 Ne4 11.Bb2 Nc4 12.Qc1 Nb2 13.Qb2 Bd6 14.Na4 Qf6 15.Qf6 Nf6 16.Rfc1 e5 17.d4 e4 18.Ne5 Rfe8 19.g4 Bc8 20.g5 Nd7 (20...Be5?! 21.de5 Bg4 22.Nc3 Be2 23.Ne2+=) 21.Nd7 Bd7 22.Nc5 Bc8 23.Bd1 Rb8 24.h4 g6 25.f4 Kg7 26.Bb3 Rd8 27.Kf2 (27.Bd5? Bc5 28.Rc5 b6 29.Rc7 Rd5–+) 27...Bf5 28.Rab1 (28.Bd5? Bc5 29.Rc5 b6 30.Rc7 Rd5–+) 28...h6 29.gh6 Kh7 30.Rh1 Be7 31.h5 g5 32.fg5 Bg5 33.Ke2 Bg4 (33...Bh6?! 34.Rhg1 Bc8 35.Rbf1=) 34.Kd2 Kh6 35.Bd1 Bd1 (35...Bc8!?–/+) 36.Rbd1+= c6 37.Rb1 Be7 38.Rhf1 f6 39.Rf4 b6 40.Na4 Rd6 41.bc6 Rc6 42.Nc3 Rg8 (42...Kh5 43.Nd5 Ba3 44.Nf6 (44.Re4?! Kg6=; 44.Rf6?! Rbc8=) 44...Rf6 45.Rf6 Bb4 46.Ke2+–; 42...Ba3?! 43.Nd5 Rbc8 44.Re4+=) 43.Nd5 Attacks the backward pawn on f6 43...Rg2 44.Ke1 Ba3 45.Kf1 (45.Rf6?? Rf6 46.Nf6 Rg1 47.Kd2 Rb1 48.Ne4 Kh5–+) 45...Rg5 46.Nf6 (worse is 46.Nb6 Rh5 47.Kg1 f5–+; 46.Rf6?? Rf6 47.Nf6 Rf5 48.Ke2 Rf6–+) 46...Bd6 47.d5 Rc2 48.Rb6 Bf4 49.ef4 Rgg2 50.Ne4 Kh5 51.d6 Rh2 52.Kg1 Rcg2 ½–½. aspasio – jessamine, net–chess.com, 2015.

5.Be2 c5 6.Nh4 Bg6 7.bc5 Bc5 8.d4 Bd6 9.Ng6 hg6 10.Nd2 Nc6 11.c4 Qc7 12.h3 0-0 13.Rb1 Rfc8 14.f4 dc4 15.Nc4 Ne4 16.Nd6 Qd6 17.Rb7 Nc3 18.Qd3 Ne2 19.Ke2 Qd5 20.Kf2 Ne5 21.fe5 Qb7 22.e4 Rab8 23.Re1 Qc7 24.Bg5 Rb2 25.Kf3 Qb7 26.Qf1 Rcc2 27.g3 f5 28.ef6 gf6 29.Bf6 Qf7 30.e5 Rf2 31.Qf2 Qb7 0–1. Mestak,Karel (1900) – Muller,H (2050), OCC, 2002.

5.Be2 c5 6.Nh4 Bg6 7.bc5 Bc5!? 8.Ng6 hg6 =.

5.Be2 c5 6.Nh4 Bg6 7.bc5 Nc6 8.Ng6+= hg6 9.d4 e5 10.c3 Qc7 11.Nd2 ed4 12.cd4 Rh2 13.Rh2 Qh2 14.Qb3 Qc7 15.Rb1 Rb8 16.Qa4 (16.Qa4 Be7 17.Bb5+/–) 1–0. Taulien,Hans_Juergen (2350) – Hoegener,Claude (2000), remoteschach.de, 2004.

5.Be2 Bd6 6.d4 a5 7.c3 (better is 7.b5!?+=) 7...ab4–/+ 8.cb4 Bb4! 9.Bd2 (9.ab4 Ra1 Pinning (9...Ra1 Deflection)) 9...Bd6 10.Nc3 0-0 (10...Ba3 11.Qb3+–; 10...Ra3? 11.Ra3 Ba3 12.Qa4 Nbd7 13.Qa3+–) 11.0-0 c6 12.Re1 Nbd7 (worse is 12...Ba3 13.Qb3 c5 14.dc5+/–) 13.Ne5? (better is 13.Nh4–/+) 13...Ne5–+ 14.a4 (14.de5 Be5 15.f4–+) 14...Nd3 15.Bd3 Bd3 16.Rc1 (16.Bc1 Bf5–+) 16...Re8 17.g3 b5 18.ab5 cb5 19.h4 b4 20.Ne2 Ne4 21.Kg2 Qf6 22.Nf4 Ra2 23.Nh5 Qf2 24.Kh3 Bg3 25.Nf4 Qh2 26.Kg4 f5 27.Kf3 Qf2 0–1. pieeater – marekt, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 Nf6 3.a3 Bf5 4.e3 e6)

5.Be2 Bd6 6.Nh4 0-0 7.Bb2 Nc6 8.0-0 Be5 9.d4+= Bd6 10.Nf5 ef5 11.Nd2 f4 12.c4 fe3 13.fe3 dc4 14.Nc4+/– b5 15.Ne5+– Be5 16.de5 Qd1 17.Rfd1 Ne4 18.Bf3 f5 19.ef6! Rae8 20.Rac1 Nf6 21.Rc6 Re3 22.Rc7 Rf7 23.Rd8 Ne8 24.Rcc8 Re1 25.Kf2 Ree7 26.Re8 (26.Re8 Re8 27.Re8 Rf8 28.Rf8 Kf8 29.Bc6+–) 1–0. Taulien,Hans_Juergen (2350) – Schollbach,Dieter (1950), remoteschach.de, 2004.

5.Be2 Bd6 6.Nh4 0-0 7.Bb2 Nbd7 8.Nf5 ef5 9.f4 Qe7 10.0-0 Rfe8 11.Bd3 Ne4 12.Nc3 Nb6 13.Rf3 a5 14.Rh3 ab4–/+ 15.Ne4 de4 16.Qh5+/– f6 17.Qh7 Kf7 18.Be2 Rh8 19.Qf5 g6 20.Rh8+/– Rh8 21.Qb5 ba3 22.Ba3! Ba3 23.Qb3 Kg7 24.Qa3 Qa3 25.Ra3 Rd8 26.d3 ed3 27.Bd3 Nd5 28.Kf2 Nb4 29.Ke2 f5 30.Bc4 Nc6 31.Rc3 Kf6 32.Bb3 Rc8 33.Bd5 Nd8 34.e4 fe4 35.Rg3 Ne6 36.Be6 Ke6 37.Rg6 Kf5 38.Rg5 Kf4 39.h4 e3 40.g3 Ke4 41.Rg4 Kf5 42.Rf4 Kg6 43.Ke3 Rh8 44.Rg4 Kf6 45.Rc4 c6 46.Rc5 Rd8 47.g4 Rd1 48.h5 Re1 49.Kf3 Kg7 1–0. Baer,Werner (2100) – Sternik,Ryszard (1935), Tiger, 2006.

5.Be2 Nbd7 6.Nh4 Bg6 7.d3 c5 8.c3 a5 9.bc5 Nc5 10.Qc2 Bh5 11.Bh5 Nh5 12.Nf3 Bd6 13.Nbd2 0-0 14.Rb1 Rb8 15.c4 dc4 16.Qc4 Qd7 17.Qb5 Qb5 18.Rb5 Nf6 19.Ke2 Nd5 20.Nb1 b6 21.e4 Nc7 22.Rb2 Rfd8 23.Rd1 Na4 24.Rc2 Rbc8 25.Bd2 e5 26.Be3 Ne6 27.Rc8 Rc8 28.d4 Rc2 29.Kd3 Ra2 30.Rd2 Rd2 31.Kd2 ed4 32.Nd4 Nec5 33.f3 Bh2 34.Kc2 Ne6 35.Kb3 Nec5 36.Kc4 Nb2 37.Kb5 Nd1 38.Bd2 Bg1 39.Nc3 Nc3 40.Bc3 Nd7 41.Nf5 g6= 42.Nd6 Kf8 43.Nc4 Ke7 44.Bd2 Ke6 45.Bf4 h5 46.a4 h4 47.Bg5 Bf2 48.Bd8 f5 49.ef5 Kf5 50.Bc7 Ke6 51.Nb6 Bb6 52.Bb6 Nb6 53.Kb6 ½–½. Taulien,Hans_Juergen (2350) – Stolz,Stephan (2410), RSS5D pro–31, 2004.

4.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.a3).

4.d4 Nc6 5.Ne5 Bh5 6.Nc6+= bc6 7.c4 dc4 8.Qa4 Qd5 9.Nc3+/– Qe6 10.Qa6 Rd8 11.Qa7 Ne4 12.Bb2 Nc3 13.Bc3+– Rc8 14.e3 Qd5 15.Qa6 Bg4 16.Qc4 Be6 17.Qc5 g5 18.a4 Bg7 19.a5 f6 20.f3 Qc5 21.bc5 h5 22.a6 h4 23.Bd3 f5 24.a7 Kf7 25.Ba6 Ra8 26.Bb7 Bd5 27.Ba8 Ra8 28.Ke2 Bc4 29.Kd2 f4 30.Rhb1 e5 31.Rb8 fe3 32.Ke3 ed4 33.Bd4 Bd4 34.Kd4 Ra7 35.Ra7 Bd5 36.Rc7 (36.Rc7 Ke6 37.Rf8 h3 38.Rff7 hg2 39.Rce7#) 1–0. Trkn – COMP, 2002.

4.d4 e6 5.Nbd2 a5 6.b5 c5 7.bc6 Nc6 8.e3 Be7 9.c4 0-0 10.cd5 Nd5 (10...Qd5 11.Rb1=+) 11.Bb2 a4 12.h3 Bh5 13.Bd3 Bg6 14.Bg6 hg6 15.e4 Nf4 16.0-0 Qb6 17.Bc3 Qa6 18.Re1 1-0. new_reflexx (2370) - shahovski (2285), gameknot.com, 2021.

4.d4 e6 5.Ne5 Bd6 (5...Bf5!?=+) 6.Ng4+= Ng4 7.e4 Nf2 (7...Qh4 8.g3 Qh5+–) 8.Kf2+/– de4 9.Nc3 f5 10.Bc4 Qh4 11.g3 Qf6 12.Kg2 Nc6 13.Bb5 0-0 14.Bc6 bc6 15.Rf1 Rad8 (better is 15...c5 16.bc5 Bc5+–) 16.Ne4! Qg6 (16...fe4 17.Rf6) 17.Nd6 Rd6?! (17...cd6 18.Qf3+–) 18.Bf4 Rd7 (18...Rd5 19.Be5+–) 19.Qd3 (19.c3 Qg4+–) 19...h5 (19...a5 20.Be5+–) 20.Rae1 h4 21.Qc4 Re8 (21...hg3 22.hg3 Re8 23.Be5+–) 22.Be5 hg3 23.hg3 (< 23.Qc6 gh2 24.Kh2 Ree7+–) 23...Qg5 24.Qc6 Red8 (24...Qd8 25.g4 fg4 26.Re4+–) 25.Bc7 Rd4 (25...Qd2 26.Kh1 Rc7 27.Qc7 Qd4 28.Re6 Qd5 29.Kh2 Qd2 30.Kh3 Kh7+–) 26.Qe6 Kf8 27.Rf5 Qf5 (27...Qf6 28.Rf6 gf6 29.Qf6 Kg8 30.Qg6 Kf8 31.Rf1 Rf4 32.Rf4 Ke7 33.Qf7#) 28.Qf5 (28...Kg8 29.Qe6 Kf8 30.Rf1 Rf4 31.Rf4#) 1–0. guest1723 – guest703, ICC, 2003.

4.e3 e5 5.c4. Cirulis,Ilmars (1650) – Tavernier,Christopher (1800), FICGS, 2014.

4.e3 Bg7 5.Bb2 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5 5.a3).

4.e3 Bg7 5.Bb2 0-0 6.c4 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.c4 0-0 5.e3 d5 6.a3).

(--> 1.b4 d5 2.Bb2 Nf6 3.Nf3).

3.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3).

3.Bb2 Nc6 4.b5 Nb8 5.e3 (--> 1.b4 d5 2.Bb2 Nc6 3.b5 Nb8 4.e3 Nf6 5.Nf3).

3.Bb2 Nbd7 (--> 1.b4 d5 2.Bb2 Nd7 3.Nf3 Ngf6).

3.Bb2 Nbd7 4.e3 c6 5.c4 e6 6.a3 Be7 7.Nc3 0-0 (---> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.c4 c6 7.Nc3 Nbd7).

3.Bb2 Nbd7 4.e3 e6 5.b5 c5 6.c4 b6 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.c4 Nbd7 6.Nf3 b6).

3.Bb2 e5 4.Be5 Bb4 5.e3 0-0 6.c4 c5 7.cd5 Nd5 8.a3 Ba5 (--> 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 4.c4 0-0 5.e3 d5 6.Nf3 c5 7.a3 Ba5 8.cd5 Nd5).

3.Bb2 Bg4 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4).

3.Bb2 Bg4 4.e3 c6 5.a3 Nbd7 6.Be2 e6 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2 e6 6.a3 Nbd7).

3.Bb2 Bg4 4.e3 c6 5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3).

3.Bb2 Bg4 4.e3 Nbd7 5.Be2 e6 6.a3 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 e6 6.a3).

3.Bb2 g6 4.e3 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.Nf3 Bg7 4.e3 d5).

3.Nc3 e6 4.a3 (--> 1.b4 e6 2.a3 Nf6 3.Nf3 d5 4.Nc3).

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

4.e3 Bg4 5.c4 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.c4 Bg4 5.Nf3).

4.e3 Bg4 5.Be2 (--> 1.b4 c6 2.Bb2 d5 3.e3 Nf6 4.Nf3 Bg4 5.Be2).

4.e3 Bg4 5.Be2 Nbd7 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 c6).

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

4.a3 b6 5.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 b6 5.Nf3).

4.a3 c5 5.bc5 Bc5 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.bc5 Bc5 6.Nf3).

4.a3 c5 5.b5 Bd6 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 c5 5.b5 Bd6 6.Nf3).

4.a3 Nc6 5.e3 Be7 6.d4 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.d4 Nc6).

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

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

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

4.a3 Be7 5.e3 h6 6.Be2 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 Be7 5.e3 0-0 6.Be2 h6).

4.b5 (--> 1.b4 d5 2.Bb2 e6 3.Nf3 Nf6 4.b5).

4.b5 c5 5.e3 Bd6 6.c4 Nbd7 (--> 1. b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 c5 5.Nf3 Bd6 6.c4 Nbd7).

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

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

4.b5 c6 5.a4 Bd7 6.e3 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd7 5.Nf3 c6 6.a4).

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

4.b5 Bd6 5.e3 0-0 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Bd6 5.Nf3 0-0).

4.b5 Bd7 5.e3 Be7 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 Be7 5.Nf3 Bd7).

(--> 1.b4 d5 2.Bb2 Bf5 3.Nf3 Nf6).

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

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

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

4.e3 Nbd7 5.Be2 e6 6.b5 (---> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Nbd7 6.Be2).

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

4.e3 e6 5.a3 Nbd7 6.c4 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.c4 Nbd7 6.a3).

4.e3 e6 5.a3 Nbd7 6.Be2 Bd6 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2 Nbd7).

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

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

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

4.Na4 b5 5.Nc5= c6 6.a4 e6 7.ab5 Bc5= 8.bc5 cb5 9.Bb2 Nc6 10.e3 de3 11.Bb5 ef2 12.Kf2 Bd7 13.Qe2 0-0 14.Rhb1 Ng4 15.Kg1+/– Qc7 16.Ra4 h5 17.h3 Nh6 18.c4 Nf5 19.Ng5 g6 20.Ne4+– Ncd4?? 21.Nf6 Kg7 22.Nd7 Rfd8 23.Qe4 Qc5 24.Nc5 (24.Nc5 Kg8 25.Qe5+–) 1–0. gtate (2475) – mic (2105), net–chess.com, 2007.

4.Na4 Qd6 5.c3 e5 6.cd4 e4=+ 7.Ne5 Qd4 8.Bb2 Qb4 9.Rb1 Be7 10.e3+/– 0-0?? 11.Nc4+– Nc6 12.Bf6 Qb1 13.Qb1 Bf6 14.Be2 a6 15.Qe4 Bd7 16.Nc5 Rae8 17.Qf4 Be6 18.Ne6 fe6 19.Qc7 Re7 20.Qb6 Rd7 21.Bg4 Re8 22.0-0 Bd8 23.Qc5 Bf6 24.Rb1 h6 25.Nd6 Ree7 26.Rb7! Ne5 27.Rb8 Kh7 28.Qc2 g6 29.Qc8 h5 30.Qg8 Kh6 31.Be6 Rd6 32.Qf8 Kg5 33.f4 (33.f4 Kh4 34.g3#) 1–0. Rosner,Dirk (2175) – Baer,Cy (1895), RSS5E–9 remoteschach.de, 2007.

4.Na4 Nbd7 5.Nd4 e5=+ 6.Nb3 Bb4 7.e3 0-0 8.c3 Bd6 9.Bc4 e4 10.0-0 c5 11.Nbc5?? Nc5–+ 12.Ba3 Ng4 13.d3 Bh2 14.Kh1 Qh4 (14...Qh4 15.Bf7 Rf7 16.Qg4 Bg4 17.Rfd1 Bg3 18.Kg1 Rf2 19.Nc5 Qh2#) 0–1. Pieleck,Andreas (1750) – Baumann,Heinz (2355), RSX9E – A00 – Sokolsky–1, 2002.

4.Na4 e5 5.c3 dc3 6.Nc3 Bd6 7.e3 e4 8.Ng5=+ Bf5 9.Qa4 Nbd7 10.Qb5= Be5 11.Bc4 0-0 12.f4 ef3–/+ 13.Nf3 a6 14.Qa5 b6 15.Qa3 Bd6 16.0-0 c5 17.bc5 Nc5 18.Be2 Rc8 19.Nd4 Bg6 20.g3 b5 21.Nf5 Bf5 22.Rf5 Na4 23.Qb3 g6 24.Rf1 Be5 25.Qa3 Nc3 26.dc3 Qb6 27.Rb1 Nd5 28.c4 Nc3 29.Rb2 Ne2 30.Re2 bc4 31.Ref2 c3 32.Qb3 Qb3 (32...Qb3 33.ab3 f5–+) 0–1. gtate (2825) – ioana, net–chess.com, 2008.

4.Na4 Bf5 5.a3= e6 6.Bb2 Bd6 7.Nd4 +=. henryk88 – Hejkramer, IECG, 2008.

4.Ne5 Bb4 5.Bb2 0-0 6.e3 Re8 7.Nd3 Ba5 8.Be2 d4 9.Nb1 de3–/+ 10.fe3 Re3 11.0-0 Re6 12.Na3 Bb6 13.Kh1 Ne4 14.Qe1 Nc6 15.Nf4 Qd2 16.Qd2 Nd2 17.Ne6 Nf1 18.Ng7 Ne3 19.Re1 Nd4 20.Bh5 Ng2–+ 21.Kg2 Kg7 22.Nc4 c5 23.a3 Bd8 24.Nd6–/+ Be6 25.Bf3 Bh4 26.Rd1–/+ Rg8 27.Bd4 cd4 28.Rd4 Bf6 29.Rd2 b6 30.Nb5 a5 31.Nc7 Kh8 32.Kh1–/+ Bg5 33.Re2 Bh3 34.Nd5 Rc8 35.c3 b5–+ 36.Re1 Bh6 37.Rb1 Rc5 38.Rd1 Bf8 39.Rd3 a4 40.Be4 Be6 41.Nb4 Re5 42.Bc6 Bc4 43.Rd8 Re1 44.Kg2 Kg7 45.Rb8 Bd6 46.Rb7 Bb4 47.cb4 Re6 48.Bf3 Re3 49.Rd7 Ra3 50.Bd5 Rb3 (50...Rb3 51.Rf7 Kg6 52.Bc4 bc4–+) 0–1. gtate (2825) – zoltanln, net–chess.com, 2008.

4.Ne5 d4 5.Na4 Bb4 6.c3 dc3 7.Nc3 0-0 8.Qb3 Qd6 9.e3 c5 10.Nc4 Qc6 11.a3 Bc3 12.Qc3 Nbd7 13.Bb2= Re8 14.a4 b6 15.f3 Bb7 16.Bd3 Rad8 17.0-0 Qe6 18.Qc2 Nf8 19.Bf5 Qe7 20.Rac1 Ba6 21.Rf2 Nd5 22.a5 Ng6 23.ab6 ab6 24.Ra1 Bc4 25.Qc4 Ne5 26.Qb3 c4 27.Qc2 Nb4 28.Bh7 Kh8 29.Qb1 Ned3 30.Bd3 Nd3 31.Rf1 Rd5 32.Bd4 Rd4 33.ed4+= Qf6 34.h3 Qg5 35.h4 Qg3 36.Qb5 Nf4 37.Qe8 Kh7 38.Qe4 Kh6 39.Qf4 Qf4 40.Rf2 Qd4 41.Ra7 b5 (41...b5 42.Rf7 b4=+; 41...f5 42.g3–/+) 0–1. Cirulis,Ilmars – Schellen,Anton, FICGS, 2006.

4.a3 (--> 1.b4 e6 2.a3 Nf6 3.Nf3 d5 4.Nc3).

4.Nd4? Bb4 5.a3 (better is 5.Nf3–+) 5...g6?? (5...Bc3 6.dc3 Ne4 7.Qd3–+) 6.g3?? (better is 6.ab4 0-0 7.Nf3+–) 6...Bc3–+ 7.Rb1?? (better is 7.dc3 e5 8.Nf3–/+) 7...Bd4 8.Bg2 (8.e3 Bc5–+) 8...0-0 (8...e5 9.0-0–+) 9.Bb2 (9.0-0 Qe7–+) 9...Bb2 10.Rb2 c5 (10...Qd6 11.Qa1–+) 11.e3 (11.c4 Nc6–+) 11...Qa5 12.Qf3 (12.Rb3 e5–+) 12...Ne4 13.c3 (13.Qd1 Qa3 14.Rb1 e5–+) 13...Qa3 14.Rb5 (14.Rc2 Qa1 15.Ke2 Qa4–+) 14...Nc3! 15.Rc5 (15.dc3 Qc1 Double attack (15...Qc1 Decoy)) 15...Qc1 0–1. Souquiere,Florence – O’Brien,Glenn, FICGS, 2007. (=1.Nf3 d5 2.b4 Nf6)

4.Nd4? e5 5.Nf3 d4 6.Nb1 –+.

4.d3 e6 5.Be3?? Bf3–+ 6.ef3 d4 7.Nb5 de3 8.fe3 Bb4 9.c3 Be7 10.d4 c6 11.Qa4 cb5 12.Bb5 Nbd7 ½–½. Schubert,Bernd (1780) – Huwer,Stephan (1950), remoteschach.de, 2009.

4.h3 Bf3 5.gf3 e5 6.a3 c6 7.d4 Nbd7 8.Rg1 g6 9.de5 Ne5 10.f4 Ned7 11.Qd2 Bg7 12.Bb2 Qe7 13.0-0-0 Nb6 14.e3 0-0-0 15.Qd4 Nh5–/+ 16.Qc5 Qc5 17.bc5 Nd7 18.Be2 Nhf6 19.Na4 Rhe8 20.Bd4 Bf8=+ 21.Bd3 Nh5 22.c4= Ndf6 23.Be2 dc4 24.Bc4 Nd5 25.Nc3 Nc3=+ 26.Bc3 f5 27.Rd8 Rd8 28.Be6 Kb8 29.Be5 Ka8 30.Bg8 Bc5 31.Bh7 Ba3 32.Kc2 Be7 33.Rg6 a5 34.Rh6 Nf6 35.Bf6 Rd6 36.Bg5 Rh6 37.Bh6 Bf6 38.Bg5 Bg7 39.h4 b5 40.h5 a4 41.h6 Bh8 42.Be7 Kb7 43.Bf5 Kb6 44.h7 c5 45.Bd6 b4 46.Be5 1–0. gtate (2625) – vitorluiz (2465), net–chess.com, 2007.

4.Bb2 Bg7 =.

4.e3 Bg4 5.Bb2 =.

4.e3 Bg7 5.d4 a5 6.b5 =.

4.e3 Bg7 5.d4 c6 6.Bd2 a6 7.Bd3 Nbd7 8.0-0 0-0 9.Re1 Qc7 10.e4+= de4 11.Ne4 Ne4 12.Re4 Nf6 13.Rh4 Rd8 14.h3 Be6 15.Qe2+= Bd5 16.Re1 e6 17.Ne5 (17...b5 18.a4+=; 17.c4 Bf3 18.Qf3 Rd7+=). gtate (2305) – domhan (2350), net–chess.com, 2006.

4.e3 Bg7 5.Be2 0-0 6.0-0 Re8 7.Bb2 e5 8.Na4 Nc6 9.b5+/– Nb8 10.Ne5 Nbd7 11.Nd7 Bd7 12.Nc5 Bf5 13.Nb7+– Qb8 14.Nc5 c6 15.a4 Qb6 16.Bd4 Rad8? 17.Nd7! Rd7 18.Bb6 ab6 19.bc6 Rc7 20.Bb5 Ne4 21.c3 (21...Ra8 22.f3+–) 1–0. ilmarinens (2285) – gbsrao (2205), net–chess.com, 2006.

4.g3 Bg7 5.Bg2 0-0 6.0-0 Re8 7.d4 c6 8.Rb1 Nbd7 9.Bf4 e5 10.Ne5+= Ne5 11.Be5+/– Bf5 12.f3 b6 13.Re1 c5 14.bc5 bc5 15.g4 cd4 16.Bd4 Be6 17.Qd2 Rc8 18.Rb7 Rc4 19.e3 Qa5 20.Ra7+– Qb4 21.a3 Qb2? 22.Rb1 (22...Rd4 23.ed4+– (23.Rb2 Rd2 24.Na4 Bh6–+; 23.Qd4?! Qc2 24.Qb4 Ng4 25.fg4 Bc3+/–)) 1–0. ilmarinens (2285) – gbsrao (2205), net–chess.com, 2006.

4.e3 b5–/+ 5.a4 c6 6.Nc3 Nd5 7.Qc2 Nc3 8.Qc3 a5–/+ 9.Ba3 e6 10.Be2? Qd6–+ 11.ab5? ab4 12.Bb4 Ra1 13.Qa1 Qb4 14.0-0 cb5 15.Rb1 Qc5 16.Bc4 bc4 17.Rb8 Bd6 18.Qg7 Rf8 19.Ra8 Qc6 20.Ra7 Qe4 21.Ne1 Be5 22.Qg5 Bd7 23.g3 Bb8 24.Ra5 Bc6 25.f3 Qb1 26.Kf2 Qb4 27.Ke2 Bd6 28.Nc2 Qb7 29.Nd4 Bd5 30.Nb5 Bf3 31.Kf2 Be7 32.Qe5 Bc6 33.Ra8 Qa8 34.Nc7 Kd7 35.Na8 Ra8 36.Qd4 Bd6 37.Qc4 Ra5 38.g4 Ra4 39.Qc2 Rg4 40.Qh7 Ke7 41.h3 Rg2 42.Ke1 Bg3 43.Kd1 Bf3 ½–½. Hellmark – Lindeberg, corr SSKK 1–449, 1992.

4.e3 e6 5.Bc4=+ Bb4 6.0-0 0-0 7.a3 Be7 8.Qb3 b6 9.d4 Bb7 10.Ne5 Nc6 11.Bb2 Na5 12.Qc2 Nc4 13.Qc4 Qd5 14.Qd5 Bd5 15.Nc3 Bb7 16.f4 c5 17.h3 cd4 18.ed4 Rfd8 19.Rad1 g6 20.g4 Rac8 21.f5 Ba3! 22.fg6 Bb2 23.gf7 Kf8 24.Rf6 Bc3 25.Rf4 Rd5 26.g5 Rcd8 27.g6 Re5 28.gh7 Rh5 29.h8N Rh8 30.Kf2 e5 31.Rg4 Bd4 32.Kg3 Bf2! 33.Kf2 Rd1 34.Rg8 Rg8 35.fg8R Kg8 0–1. rogeliovargas (2210) – rpatrick (2345), net–chess.com, 2009.

4.a3 e6 5.d4 c6 6.c3 Nbd7 7.Be2 Bd6 8.h3 0-0 9.0-0 Re8 10.Bd3 Ne4 11.Qe2 e5=+ 12.Nbd2?? ed4?? 13.cd4=+ h6 14.Ne1 Ndf6=+ 15.f3?? Ng3 16.Rf2?? Ne2 17.Be2 Re3 18.Kf1 Bg3 19.Nb3 Bf2 20.Be3 Be3 21.Rd1 Qe7 22.Nc2 Bf5 23.Bd3 Bd3 24.Rd3 Bg5 25.Nd2 Re8 26.Re3 Be3 27.Ne3 Qe3 28.g4 Qd2 29.h4 Re1# 0–1. Durrieu,E – Franz,I, Bad Wildbad, 1993.

4.a3 e6 5.d4 Bd6 6.Bd3 =.

4.a3 e6 5.d4 Be7 6.Bd3 h6 7.0-0+= Nbd7 8.Nbd2 b6 9.c4 c5 10.cd5 Nd5 11.bc5 bc5 12.Bb2 Bf6 13.Ne4+/– Be7 14.dc5+– Nc5 15.Nc5 Bc5 16.Bg7 Rg8 17.Bh6 Nc3? 18.Qc2 Bb7 19.e4 Rc8 20.Kh1 Be7 21.Qb2 Rc7 22.Bc2 Qd6 The isolani on a3 becomes a target 23.Rfe1+/– e5 24.Bd2 Qg6 25.g3 Qh5 26.Kg2+/– Bc8 27.h4 Nb5 28.Bd3 Bh4?? 29.Rh1 f5 30.Bb5 ab5 31.Qb5 (31...Rd7 32.Rh4+–) 1–0. Baer,Werner – Nittschalk,Karl, TT–18.27 ETC, 2005.

4.a3 Bg4 5.Be2 =.

4.a4 Bd7 5.b5?? (5.d4 Bf5=) 5...a5?? (better is 5...ab5 6.Be2 ba4–+) 6.Bb2= b6 (6...Bg4 7.h3 Bh5 8.g4=) 7.c4 c6 8.cd5 Nd5 9.Bc4 Be6 (9...Bg4 10.h3 Bh5 11.g4+=) 10.Qb3 f6? (better is 10...Nb4 11.Be6 fe6+/–) 11.0-0 (11.0-0 cb5 12.Qb5 Qd7 13.Rc1+/–) 1–0. decembernight – jozekgr, kurnik, 2011.

4.Bb2 e6 =.

4.Bb2 Bg4 5.Be2 Bf3 6.Bf3 e5 7.d3 (better is 7.Be5 Bb4 8.c3+/–) 7...Bb4–/+ 8.Nd2 Bd6 9.0-0 0-0 10.c4 c6 11.cd5 cd5 12.Re1 Nc6 13.Rc1 Rc8 14.Rc2 Qe7 15.Qe2? (15.Qb1 Nb4 16.Rcc1 b5–/+) 15...e4 (better is 15...Nd4! 16.ed4 Rc2 17.de5 Rb2 18.ed6 Qd6–+) 16.de4–/+ de4 (16...Nd4 17.Bd4 Rc2 18.ed5 Rd8–/+) 17.Bg4? (17.Bf6 Bh2 18.Kh2 Qd6 19.Kg1 ef3 20.Qf3 Qf6 (worse is 20...gf6 21.Ne4 Qe7 22.Qg3 Kh8 23.Nd6+/–) 21.Qf6 gf6=) 17...Rcd8?? (17...Nd4! 18.Bc8 Ne2 19.Re2–+) 18.Bf5 (18.Bf6!? Qf6 19.Ne4=) 18...g6 19.Bh3 Ne5 20.Nc4 Nd3 21.Bf6 Qf6 22.Nd6? Rd6 23.Rd1? Rfd8 24.Rcd2?? h5 25.g3? b5 26.Bf1 a5 27.Kg2 b4 28.f3? ef3 29.Qf3 Qc3 30.Bd3 Rd3 31.Rd3 Rd3 32.Rd3 Qd3 33.Qa8 Kg7 34.Qa5 Qe2 35.Kh3?? Qg4 36.Kg2–/+ Qe4 37.Kh3 Kh6 38.Qc5 g5 39.Qd4?? Qf5 40.Kg2+= Qc2 41.Kh3?? Qa2 42.Qb4?? Qe6 43.Kg2+= Qe3 44.Qd6 Qe6–/+ 45.Qd3 f5 46.h3? Kg6 47.Qf3? Qe4–+ 48.Kf2 Qf3 49.Kf3 Kf6 50.Ke3 Ke5 51.g4 hg4 52.hg4 f4 53.Kf3 Kd4 54.Ke2 Ke4 55.Kf2 f3 56.Ke1 Kf4 57.Kf2 Kg4 58.Kg1 Kf4 59.Kf1 g4 60.Kg1 g3 61.Kf1 Ke3 62.Ke1 f2 63.Kf1 ½–½. alfy – kukuryku64, kurnik, 2012.

4.Bb2 Bg4 5.Be2 h6 6.a3 Nc6 7.d4 e6 8.Nbd2 b5 9.h3 Bf5 10.g4 Bh7 11.Nb3 Ne4 12.Nbd2 Nd2 13.Qd2 Be7 14.Bd3 Bd3=+ 15.Qd3 Bf6 16.e4 de4 17.Qe4 Qd5 18.Qd5= ed5 19.Kd2 0-0 20.Rhe1 Rae8 21.Kd3 g5 22.c3 a5 23.Re3 Re3 24.fe3 a4 25.Re1 Nd8 26.e4+= de4 27.Re4 Ne6 28.Bc1 Rd8 29.Re1 c5 30.bc5 Nc5 31.Kc2 Nb3 32.Bb2 Kf8= 33.Ne5 Be5 34.Re5 Rb8 35.Kd3 f6 36.Re6+= Kf7 37.Re3 Rh8 38.c4+= bc4 39.Kc4 Rc8 40.Kb4 Ra8 41.d5 Kg6 42.Re6 Nd2? 43.Rf6 Kh7 44.Rf7 Kg6?? 45.Rg7# 1–0. rgreatrex (2090) – valerypavlovich (2100), net–chess.com, 2008.

4.a4 e6 5.b5 Bd7 6.Be2 Bd6 7.0-0 0-0 8.Bb2 cb5 9.ab5 b6 10.c4 dc4 11.Bc4 Be8 (11...a5!?=) 12.d4 h6 13.Nbd2 Qc7 14.e4 Bf4 15.e5 Bd2 16.Nd2 (16.Qd2 Qc4 17.ef6 Bb5 18.fg7 Kg7 19.d5 Kh7 20.de6 Rg8 (20...Qe6? 21.Qb4 Rg8 22.Qb5 Rg2 23.Kh1+–) 21.ef7 Rg2 22.Kh1 Nd7+/–; 16.ef6?! Bc3 17.Bc3 Qc4=) 16...Nd5 17.Ba3 Nc3? (17...a5 18.ba6 Ne7+–) 18.Qf3 Nb5 19.Bf8 (19.Qa8?! Bc6 20.Bd6 Ba8 21.Bc7 Nc7 22.Ra7 Rc8+–) 19...Kf8 (19...Bc6 20.Qd3 Qd7 21.Ba3+–) 20.Bb5 (20.Qa8 Bc6 21.Qc6 Qc6 (worse is 21...Nc6 22.Bb5 Nd4 23.Rfc1+/–) 22.Bb5 Qb5 23.Ra7 Nc6 24.Ra8 Ke7+/–) 20...Bb5 21.Qa8 Bf1 22.Kf1 (better is 22.Ra7!? Bg2 23.Kg2 Qd8+–) 22...Ke7 (22...a5+–) 23.Ra7 (23.Ra7 Qa7 24.Qa7 Nd7 25.Nc4+–) 1–0. pumpkin (2620) – mpopp (2120), net–chess.com, 2013.

4.c4 Bg4 5.Bb2 Nbd7 6.h3 Bf3 7.Qf3 e6 8.a3 Qc7 9.cd5 cd5 10.Nc3 a6 11.Rc1 Rc8 12.g4 Ne5 13.Qd1 Nc4 14.Bc4 dc4 15.Qa4 Qd7 16.Qd7 Kd7 17.Ke2 Be7 18.Rhd1 Rhd8 19.Na4 Kc6 20.Rc4 Kb5 21.Rc8 Rc8 22.Nc3 Kc4 23.Rb1 Kb3 24.Kd1 Rd8 25.g5 Ne8 26.h4 h6 27.f4 hg5 28.hg5 Nc7 29.Ne4 Ka2 30.Kc2 1–0. Welling – Vanheirzele, Brussels 1996.

4.c4 Bg4 5.cd5 cd5 (5...Nd5 6.a3=+) 6.Bb2 Bf3 (6...e6 7.a3=) 7.gf3 (7.Qf3 e6=) 7...e6 8.Rg1 Nbd7 9.Nc3 g6 (9...d4 10.Ne2 de3 11.fe3=+) 10.Qb3 (10.a3 Rc8=) 10...Rc8=+ 11.f4 Bg7 (11...a6!?=+) 12.Nb5+= 0-0 13.Na7 Ra8 14.Nb5 Ne4 (14...Qe7 15.Rc1+=) 15.Bg7 Kg7 16.Qb2 Kg8 17.d3 Nef6 18.a4 Qe7 19.Be2 Nb8 20.Nd4 Nc6 21.Nc2 (21.Nc6 bc6 22.Qc3 Rfb8+=) 21...Nd7 22.Bf3 (22.d4+=) 22...e5 (22...Rfc8 23.h3+=) 23.fe5 (23.Bd5 ef4 24.Bc6 bc6+/-) 23...Nce5 24.Be2 f5 (24...Rfc8 25.h3+=) 25.Qb3 Nf6 26.Rg3 (26.h4 Neg4+-) 26...Kh8 (26...Nc6 27.b5 Na5 28.Qb4+/-) 27.Kf1 (27.f4 Nc6+/-) 27...f4 (27...Nf7 28.f4+/-) 28.ef4 Ned7 (28...Nc6 29.f5 gf5 30.Re1+/-) 29.Qb2 Qd6 30.Qd4 Qb6 (30...Nb6 31.a5 Nc8 32.Kg2+/-) 31.a5 (31.Qb6 Nb6 32.a5 Nc8+-) 31...Qd4 (31...Qb5 32.Rg5+-) 32.Nd4 Ne8 33.Ne6 Rf6 34.Re3 Nd6 (34...Nf8 35.Nc5 b6 36.Nb3 Rf4 37.d4+-) 35.Nc7 Rd8 (35...d4 36.Na8 de3 37.fe3+-) 36.Nd5 Rf5 (36...Rf7 37.a6 ba6 38.Ra6+-) 37.Bf3 Nf6 38.Re5 (38.Nf6 Rf6 39.Re7 Rb8+-) 38...Nd5 39.Rd5 Rf4 40.Be4 Rf6 41.b5 Rc8 (41...Rd7 42.a6 ba6 43.Ra6+-) 42.Ra2 (42.a6 Ne4 43.de4 ba6+-) 42...Ne4 (42...Rc7 43.Kg2+-) 43.de4 Rf7 44.e5 Kg7 45.Ke2 Rfc7 (45...Kf8 46.a6 ba6 47.ba6+-) 46.Rad2 Kf7 47.f4 (47.Ke3 Ke7+-) 47...Ke6 48.Kf3 (48.Ke3 Kf5+-) 48...Kf5 49.Rd7 (49.Re2 Rc3 50.Re3 Re3 51.Ke3 Rc3 52.Kd4 Rc2+-) 49...Rd7 50.Rd7 Rc3 51.Ke2 (51.Kf2 Ra3 52.Rf7 Kg4+-) 51...Ra3 52.Rf7 Ke6 (52...Ke4 53.e6 (53.Rh7?! Ra5 54.Rb7 Ra2 55.Kd1 Rh2+-; 53.Rb7?! Ra5 54.e6 Ra2 55.Kd1 Ra1 56.Kd2 Ra2 57.Kc3 Kd5+-) 53...Ra2 54.Kd1 Ra5 55.Rf8 Ra1 56.Kd2+-) 53.Rb7 (53.Rh7 Kf5+-) 53...Ra5 54.Kf3 Kf5 (54...h5 55.Rb6 Kd5 56.Rd6 Kc5 57.b6 Ra3 58.Ke4 Ra4 59.Ke3 Ra3 60.Rd3+-) 55.Rf7 Ke6 56.Rh7 Rb5 57.Rg7 Rb2 58.Rg6 Kf7 59.Rf6 Kg7 60.h4 (60.h4 Rh2 61.Kg4+-) 1-0. Dimakiling,O (2410) - Senthil,Maran K (2175), 20th Dubai Open, 2018. (=1.Nf3 d5 2.e3 Nf6 3.b4 c6)

4.b5 Na5 5.Be2 Bf5 6.0-0 e6 7.Nh4 Bc5 8.Nf5 ef5 9.d4 Bb4 10.a3 Bd6 11.Bd2 b6 12.Ba5 ba5 13.Qd2 a4 14.Qd3 g6 15.c4 Qb8 16.Bf3 c6 17.bc6 dc4 18.Qc4 Bh2 19.Kh1 0-0 20.Nc3 Rd8?? (better is 20...Bc7+–) 21.Rab1 (21.Qa4?! Bc7+–) 21...Qd6 22.Nb5 (22.Qa4?! Ne4 23.Be4 fe4+–) 22...Qe7 23.Kh2 Ne4 24.Be4 (24.Qa4?! a6 25.Be4 ab5 26.Qb5 fe4+–) 24...fe4 25.Qa4 a6 26.Nc3 Qh4 27.Kg1 h6 28.c7 Re8 29.Qe8! Re8 30.Rb8 Qe7 (30...Rf8 31.Rf8 Kf8 32.c8Q Kg7+–) 31.Nd5 Qf8 32.Nf6 Kg7 33.Ne8 Kg8 34.Nf6 Kg7 35.Rf8 Kf8 36.Rc1 (36.c8Q Kg7 37.Nd7 g5 38.Qf8 Kh7 39.Qf7 Kh8 40.Nf8 h5 41.Ng6) 36...Kg7 37.Rc6 h5 38.c8Q Kh6 39.Qh8 Kg5 40.Rc5 Kh4 41.Rh5! gh5 42.Qh5 1–0. GLChess211 – Nero5, computer chess game, 2000.

4.b5 Nb4 5.Ne5?? (better is 5.a3+–) 5...Bf5 (better is 5...Ng4 6.Ng4 Bg4 7.Qg4 Nc2 8.Kd1 Na1=) 6.Be2?? (6.d3 e6 7.a3+–) 6...Nc2–+ 7.Qc2 (7.Kf1 Na1 8.Bb2–+) 7...Bc2 8.Nc3 (8.0-0 e6–+) 8...e6 9.d4 Ne4 10.f3 (10.Ne4 Be4 11.0-0–+) 10...Nc3 11.Kd2 Bb4 12.a3 Ba3! 13.Ra3 Nb5! 14.Ra5 c6 15.Kc2 Qa5 16.Bd2 Qa4 17.Kd3 f5 18.g4 fg4 19.fg4 Rf8 20.g5 Rf2 21.Re1 Qa3 22.Kc2–+ 0-0-0 23.Nf7 Rf8 24.Ne5 Qa4 25.Kd3 Qb3 26.Bc3 Qc3 0–1. msfnet – clfritz, net–chess.com, 2004.

4.b5 Nb8 5.Bb2 Bg4 6.Be2 e6 7.a4 Bd6 8.Nd4 Be2 9.Ne2 e5 10.Ng3 0-0 11.Nf5 g6 12.Nd6 cd6 (12...Qd6? 13.Ba3 Qd8 14.Bf8 Qf8 15.0-0+/–) 13.0-0 Nbd7 14.d4 e4 15.Ba3 Nb6 16.Bb4 Nc4 17.Nd2 Rc8 18.Nc4 Rc4 19.c3 Qd7 20.h3 Rd8 21.Qb3 Qf5 22.a5 h5 23.Qa3 Qe6 24.Rab1 g5 25.a6 b6 26.Rb2 h4 27.Qa1 g4 28.hg4 Qg4 29.Qd1 Qg6 30.f3 h3 31.Rbf2 Rd7? 32.Kh2+/– ef3 33.gh3 Kf8 34.Qf3 Ne4 35.Rg2 Qe6? 36.Qg4 (36.Qg4 Qg4 37.Rg4 Nc3 38.Bc3 Rc3 39.Rf5+=) 1–0. ludice (1700) – 1piotr, kurnik, 2011.

4.a3 Bg4 5.Bb2 Nbd7 6.c4 e5 7.h3 Bh5 8.Be2 (8.g4 Bg6=) 8...dc4=+ 9.g4 Bg6 10.Bc4 e4 11.Nh4 Ne5 (11...Nb6 12.Qb3=+) 12.Ng6 hg6 13.Be5 Qe5 14.Nc3 c6 15.Qb3 Nd5 (better 15...Qe7!?=+) 16.Bd5 cd5 17.Qa4 Kd8 (17...Ke7 18.Qb5 b6 19.Qd5 Qd5 20.Nd5 Kd6 21.Nc3+–) 18.Qa5 b6 19.Qd5 Qd5 20.Nd5 Rc8 21.Nc3 (21.Rd1 Bd6+–) 21...f5 22.Ke2 Bd6 23.Nb5 (23.f3 ef3 24.Kf3 Be5+–) 23...Bb8 (23...Be5 24.Na7 Rc7 25.Nb5 Ba1 26.Nc7+– (26.Ra1?! Rf7=)) 24.Nd4 (24.Rag1!? Be5 25.Na7+–) 24...Be5+= 25.Rac1 (25.f3!? ef3 26.Kf3 Bd4 27.ed4+=) 25...Rc1= 26.Rc1 Bd4 27.ed4 Rh3 28.gf5 (28.Rc3 Rh4=) 28...gf5 29.Rc3 Rc3 (29...Rh1!?=) 30.dc3+= g5 (better 30...b5 31.Ke3 g5=) 31.f3?? (better 31.c4 Kd7 32.Ke3+–) 31...ef3–+ 32.Kf3 b5 33.Ke3 Kd7 34.Kf3 Ke6 35.Ke2 (35.Ke3 f4 36.Ke4 a6–+) 35...f4 36.Kf3 Kf5 37.Ke2 Ke4 38.Kf2 g4 Black plans f3 39.Kf1 f3 40.Kf2 Kf4 41.Kf1 g3 0–1. Loskutova,Anastasia (1785) – Poltavets,Ivan (1920), Fide Open, 2013.

4.c4 Qb4 5.Ba3 Qa5 6.cd5 Nd5 7.Qb3 Nc6 8.Bb5 a6 9.Bc6 bc6 10.0-0 Qb6 11.Qa4 g6 12.e4 Bg7 13.d4 Nf4 14.Nc3 a5 15.Ne5 Exerts pressure on the isolated pawn 15...Be5 16.de5 Be6 17.Rfd1 g5 18.Rac1 Kf8 19.Rd2 Ng6 20.Ne2 Ne5 21.Nd4 Bd7 22.Nb3 f6 23.Nc5 Bc8 24.Rb2 Qa7 25.Rcb1 Kg7 26.Qc2 Kg6 27.Rb7! Bb7 28.Rb7 Qb7 29.Nb7 Rhb8 30.Nc5 h5 31.h3 Rb5 (31...Rb6 32.Bb2 Rb2 33.Qb2+-) 32.Bb2 Nf7 (32...Rd8 33.Be5 fe5 34.Nd7+-) 33.e5 f5 (33...Kh6 34.ef6 ef6 35.Bf6+-) 34.Qc4 Rb2 (34...Kg7 35.Ne6 Kh7+-) 35.Qe6 Kg7 36.Qe7 Kg8 (36...Rb1 37.Kh2 Kh8 38.Qf6 Kh7 39.Ne6 Rg8 40.Qf7 Kh6 41.Qg8 Rh1 42.Kh1 h4 43.Qg5 Kh7 44.Qg7) 37.Ne6 Ra2 (37...Rb1 38.Kh2 Ra6 39.Qf8 Kh7 40.Qg7) 38.Qf6 Ra1 39.Kh2 (39.Kh2 Rh1 40.Kh1 Ne5 41.Qg7) 1-0. jon_lord (2185) - slazenger (2055), League division B1, lichess.org, 2022.

4.Nc3 e6=.

4.d4 Ne4 5.Bd3=+.

4.d4 e6 5.a3 Bd6 (5...a5 6.ba5 Bd6 7.c4=+) 6.Nbd2 (6.c4 dc4 7.Bc4 Nb6=) 6...c6 (6...e5 7.de5 Ne5 8.Bb2 Nf3 9.Nf3=+) 7.c4 (7.Bb2 0-0=) 7...0-0 (7...e5 8.cd5 cd5 9.de5 Ne5 10.Bb2 Nf3 11.Nf3=) 8.Bb2 Ne4 (8...Qe8 9.cd5 ed5 10.Bd3=) 9.Bd3 f5 10.0-0 Qf6 11.Rc1 b6 12.cd5 cd5 13.Qa4 (13.Bb5 a6 14.Qa4 Nd2 (14...ab5? 15.Qa8 Nb8 16.Rfd1+–) 15.Nd2 Qh6=) 13...Qh6= 14.Qd1 (14.Ne4 de4 15.Qc6 ef3 16.Qd6 fg2+=; 14.Be4 fe4 15.Ne5 Rd8=) 14...a5= (14...Bb7 15.h3=) 15.b5 (15.ba5 Ra5 16.Rc6 Bb8=) 15...Qf6 (15...Bb7 16.Qe2=+) 16.Qe2 (16.Rc6 Qe7=+) 16...a4 (16...Bb7 17.Rc2=+) 17.Rc2 (17.Rc6 Qe7=+) 17...Bb7 (17...Qe7 18.Ra1=) 18.Rfc1 Rae8 (18...Rab8 19.Nb1=) 19.Nb1 Qh6 (19...Ra8 20.Nbd2=) 20.h3 (20.Rc7 Bc7 21.Rc7 Bc8+=) 20...Qf6 (20...Rf6 21.Rc7 Ndc5 22.dc5 Bc7 23.c6=) 21.Nc3 (21.Rc7 Bc7 22.Rc7 Bc8=) 21...Ra8= 22.Qd1 Rfd8 (22...f4 23.ef4 Bf4 24.Ra1=) 23.Ne2 Qe7 (23...Qh6 24.Qe1=) 24.Nf4 Bb8 (24...Re8 25.Ra1=; 24...Rdc8 25.Rc8 Bc8 26.Ne5+=) 25.Ne5 (25.Qe1 Bd6+=) 25...Be5 26.de5 Nec5 27.Rb1 Rdc8 28.Bd4 Nb3 29.Rc8 Rc8 30.Bc2 Na5 (30...Nd4 31.ed4 Nf8 32.Ba4 Qa3 33.Bb3+=) 31.Ba4+= (31.Rb4 Nc4 32.Ra4 Rc7+=) 31...Nc4= 32.Nd3 Na3 33.Ra1 Nc4 ½–½. Baer,Werner – Woelfelschneider,Peter, TT–12 ETC, 2004.

4.d4 e6 5.Bd2 Bd6 6.c4 c6 7.c5 Bc7 8.Be2 e5 9.0-0 h5 10.Ng5 Ng4 11.h4 e4 12.b5 (12.Bg4? hg4 13.g3 Nf8-+) 12...Ndf6 13.g3 Nh7 14.Nh7 Rh7 15.Nc3 g5 16.Qc2 (16.Qa4 Bd7 17.Qc2-/+) 16...Kf8-/+ 17.bc6 bc6 18.a4?? (18.Qa4 Bd7 19.Qa3 gh4 20.Bg4 hg4 21.Nd5 cd5 22.c6 Kg7 23.Ba5 Ba5 24.Qd6-+) 18...gh4-+ 19.Ne4 Bf5 (19...Bf5 20.Bd3 de4 21.Be4 Be4 22.Qe4 Rg7 23.Qc6 hg3 24.fg3 Bg3-+; 19...de4?! 20.Qe4 Rh6 21.Qg2-+) 0-1. jon_lord (2250) - sakosturmo (2400), League division A2, lichess.org, 2022.

4.d4 e6 5.Bd2 Ne4=+.

4.Bb2 Bb4 5.Ne5 Bf5 6.Bd3 Bd3 7.Nd3 =.

4.Bb2 e4–/+ 5.Nd4 Bb4 6.c4 (6.Be2 0-0–/+) 6...c5 (6...0-0 7.cd5 Qd5 8.Nc3–/+) 7.a3 cd4 8.ab4 de3 (8...d3 9.cd5 Qd5 10.f3=+) 9.de3=+ Nc6 (9...Be6 10.c5=+) 10.Nc3 (10.cd5 Nd5 11.b5 Ncb4 12.Bg7 Rg8=) 10...Be6 (better is 10...dc4!? 11.b5 Qd1 12.Nd1 Nb4 13.Bf6 gf6–/+) 11.cd5= Nd5 12.Bc4?? (better is 12.Nd5!? Bd5 13.b5+=) 12...Nc3–/+ 13.Qd8 Kd8 14.Be6 Ke7 (better is 14...Nb4 15.Kd2 fe6 16.Bc3 Nd3–/+) ½–½. Garbacki – Pilczuk, corr 1. AMM Poland, 1991.

5.Ba3 Ba3 6.Na3 0-0 =+.

5.Bb2 0-0 6.c4 Nbd7 7.Nd7= Bd7 (< 7...Qd7 8.Bf6 gf6 9.Qb3+/–) 8.cd5 (8.Qb3!? Bd6 9.cd5= (9.Qb7? Rb8 10.Qa7 Rb2–+)) 8...Nd5=+ 9.Bc4? (better is 9.Nc3 Be6 10.a3=+) 9…Ne3!–+ (10.fe3 Qh4 11.Kf1 Qc4 12.Qe2 Qh4–+) 0–1. Searles – Brandt, Grand National, 1983.

5.Bb2 0-0 6.c4 Nbd7 7.Nf3 Nb6 8.a3 Ba5 (8...Bd6 9.cd5 Nbd5 10.Be2=+) 9.cd5 Nbd5 10.Bc4 Bg4 11.0-0 a6 12.Ba2 Re8 13.d3 Qd7 (13...c5 14.h3 Bh5 15.g4=) 14.h3= Bh5 15.Nbd2 (15.g4 Ng4 16.Bd5 Qd5 17.hg4 Bg4 18.Kg2–+) 15...Bd2–/+ 16.Qd2 Bf3 17.e4 (better 17.gf3 Qh3 18.e4–/+) 17...Re6?? (17...Be4 18.de4 Re4 19.Rad1–/+) 18.ed5?? (18.gf3 Rb6 19.ed5 (19.Bd5? Nd5 20.Bd4 Rg6 21.Kh2 Rh6 22.Qh6 gh6 23.Rg1 Kf8–+) 19...Qh3 20.d6=) 18...Bd5–/+ 19.Bf6 Rf6 20.Bd5 Qd5 21.Rae1 h6 (21...Rg6 22.g3–+) 22.Re7–/+ c5 23.Rfe1 Rd8 24.Qc2 (24.R7e5 Qb3 25.Qa5 Rd3 26.Qc5 Kh7–/+) 24...b6 25.R1e3 Rg6 26.g3 Qf5 27.Kg2 Rf6 28.R7e4 Qd5 29.Kg1 Qc6 30.Qc3 Rfd6 31.Rg4 g6 32.Rge4 h5 (32...Rd4 33.Re7–/+) 33.Re7 Rd4 34.h4 a5 35.Ra7 Ra8 36.Rae7 a4 37.Qe1 Rd7 38.Re8 Kh7 39.R8e5 Rad8 40.Qc3 Rd5 (40...Qb5 41.Re7 Re7 42.Re7–/+) 41.Re7 Rf5 42.Qb2 b5 43.Qc3 Rd4 Black plans c4 44.Qb2 Rg4 45.Qa2 c4 46.dc4 Rc4 47.Re2 (47.Re1 Qc5 48.R1e4 Re4 49.Re4 Rf3–+) 47...Rc1–+ 48.Re1 Re1 (48...Qc4 49.Qc4 Re1 50.Re1 bc4 51.Kg2–+) 49.Re1–/+ Rf3 50.Re3 Kg8 51.Re1 (51.Qd2 Re3 52.Qe3 Kf8–/+) 51...Rb3 (51...Qc5 52.Re8 Kh7 53.Re3 Re3 54.Qf7 Kh6 55.Qf4 Kg7 56.fe3 Qa3 57.Qe5 Kf7 58.Qd5 Kf8 59.Qd8 Kg7 60.Qc7 Kf6 61.Qf4 Ke6 62.Qe4 Kd7 63.Qb7 Kd6 64.Qb8 Ke6 65.Qe8 Kd5 66.Qb5 Ke4 67.Qe8 Kf3 68.Qf7 Ke3 69.Qf2 Ke4 70.Qf4 Kd5 71.Qf7 Kd4 72.Qf4 Kc3 73.Qe3 Kb2 74.Qe2 Kb1 75.Qe4 Ka1 76.Qg6 Qe3 77.Kg2 Qe2 78.Kg1–+) 52.Qa1 Kh7 0–1. Reid,Malcolm (2120) – Kireev,Sergey (2195), FICGS, 2017.

5.Bb2 0-0 6.c4 Be6 7.Qc2 (7.Qb3 Na6 8.cd5 Qd5 9.Qd5 Nd5=) 7...c5 (7...Re8!?–/+) 8.cd5 Qd5 9.f3 (9.a3 Ba5=) 9...Nbd7+= 10.Bc4 Qd6 11.Nd7 Nd7 12.Be6 Qe6 13.0-0 Rfd8 14.Qb3 (14.a3 Ba5+=) 14...Nf8 (14...Nb6 15.Rc1–/+) 15.Qe6 (15.Rf2!?+=) 15...Ne6–/+ 16.Rd1 Rd7 (16...c4 17.a4–/+) 17.Kf2 (17.a3 Ba5 18.Bc3 Bd8+=) 17...Rad8 18.Ke2 Re8 19.Kf1 c4 (19...f6 20.Bc3–/+) 20.Na3+= Ba3 21.Ba3 b5 22.Bb4 Nc7 (22...Nd8 23.a3+=) 23.a4 Nd5 (23...Na6 24.Rab1=) 24.Ba5= a6 25.ab5 ab5 26.Rdb1 Rb7 27.g3 f6 28.e4 Ne7 29.Bb4 Nc6 30.Bc5 Ne5 31.Ke2 Nd3 32.Bb4 f5 33.Ke3 fe4 34.fe4 Rb6 (better is 34...Rf7+=) 35.Ba5? (better is 35.Kd4=) 35...Rbe6–/+ 36.Rb5 (36.Kf3 Re4 37.g4 Re1–+) 36...Re4–+ 37.Kf3 Ne1 38.Kf2 (38.Re1 Re1 39.Bc3 Rf8 40.Kg4 Re4 41.Kh3 h6–+) 38...Re2 (better is 38...Rf8 39.Kg1 Nf3 40.Kh1 Re2–+) 39.Kf1–/+ Rh2 (39...Nc2 40.Ra4 Nd4 41.Rd5 Rf8 42.Kg1 Nf3 43.Kf1 Rh2 44.Rc4 Nd2 45.Kg1 Nf3 46.Kf1+=) 40.Bc3+= Nf3 (40...Nc2!? 41.Kg1 Rd2+=) 41.Rb7= Nd2 42.Kg1 Nf3 43.Kf1 Nd2 44.Kg1 Nf3 45.Kf1 Rh1 46.Kf2 Ra1 47.Rg7 Kf8 48.Ba1 Ne1 49.Rh7 Nd3 50.Kf3 Re1 51.Bd4 Rf1 52.Ke4 Rc1 53.g4 Re1 54.Kd5 Nf4 55.Kc4 Ne6 56.Bc3 Re4 57.Kd5 Ng5 58.Rh4 Ra4 59.Rh8 ½–½. Stocek,J (2550) – Riazantsev,A (2680), European Rapid, 2014. (=1.Nf3 d5 2.e3 Nf6 3.b4 e5 4.Ne5 Bb4)

5.Bb2 0-0 6.c4 Re8!? =+.

5.Bb5 c6=+ 6.Be2 Qe7 (6...0-0 7.Ba3 Ba3 8.Na3–+) 7.Bb2= Bd6 8.d4 Nbd7 9.Nf3 (9.Nd7 Bd7 10.0-0 0-0=+) 9...Nb6 10.Nc3 (10.0-0 0-0=+) 10...Bg4 11.Rb1 (11.Ne5 Be2 12.Ne2 Nfd7–/+) 11...Rd8 (11...0-0 12.Ne5 Be2 13.Ne2 Be5 14.de5–/+) 12.h3=+ Bf5 13.Bd3 (13.0-0 0-0=+) 13...Ne4 (13...Bd3 14.cd3 0-0 15.0-0–/+) 14.0-0=+ h6 (14...Nc3 15.Bc3 Bd3 16.Qd3=) 15.Be2 (15.Ne5 0-0=) 15...0-0=+ 16.Ne4 de4 Black gets strong initiative 17.Nd2 Qg5 18.Bg4 Bg6 19.c4=+ f5 20.Be2 f4 21.ef4 Bf4 22.Nb3=+ e3 23.fe3? Be3–+ 24.Kh1 Be4 25.Bg4 Rf1 26.Qf1 Rf8 27.Bf3? Bf3 28.gf3 Qh5 29.Kg2 Qg6 30.Kh2 Qc2 31.Kh1 Rf3!! 32.Qf3 Qb1 33.Bc1 Bc1 34.Kg2 Qa2 35.Kg3 Bg5 36.Qd3 Qa6 37.h4 Be7 38.Nc5 Qc4 39.Qc4 Nc4 40.Nb7 a5 41.Nc5 Bc5 42.dc5 a4 43.Kf4 a3 44.Ke4 a2 (45.h5 a1Q–+) 0–1. Jonsson,Gudbrandur – Baer,Werner, TT07 TSC, 2003.

5.Be2 Nbd7 6.Nf3 0-0 7.0-0 Nb6 8.c3 Be7 9.d4 Ne4 10.Nfd2 Nd6 11.a4 a5 12.Ba3 c6 13.Qb3 Be6 14.Rc1 (14.Ra2 Nbc4=) 14...Re8 (14...Qc7 15.Ra2=) 15.Qd1 (15.Bc5 Nbc8=) 15...Rc8 (15...Rb8 16.Bd3=) 16.h3 (16.Bd3 Bf5 17.Bf5 Nf5 18.Be7 Qe7=) 16...Bf5 17.Bg4 Bg4 18.Qg4 Nbc4 (18...Ndc4 19.Nc4 Nc4 20.Ra2=+) 19.Bd6= Nd6 (worse 19...Qd6 20.Nc4 dc4 21.Nd2+/-) 20.Nb3 b6 21.N1d2 h6 (21...f5 22.Qf3=) 22.Rc2 Bf8 23.Qf3 (23.c4 dc4 24.Nc4 Nc4 25.Rc4 Qd5=) 23...Re6 24.Qd1 (24.c4 Rf6 25.Qh5 dc4 26.Nc4 Nc4 27.Rc4 Re6=) 24...Rb8 25.Qe2 Be7 26.Nc1 (26.Rb1 Rg6=) 26...Ne4 (26...Nf5 27.Qd3 Nh4 28.Ne2=) 27.Ne4 (27.Nd3 Nd2 28.Qd2 Bd6=) 27...de4 28.Qf1 (28.Rb2 Bd6=+) 28...Bd6=+ 29.Ne2 Qd7 30.c4 Rd8 31.Rd1 White prepares the advance d5 31...Rg6 32.Kh1 h5 (32...Bb4 33.Ng3 Qe8 34.Qe2=) 33.Rb1 (33.Nc3 Qf5=) 33...Bb4 34.Ng3 c5 35.d5 The passed pawn on d5 quickly leads to threats (35.Ne4 cd4 36.ed4 Qa4-/+) 35...Qa4 (35...Qe8 36.Nh5 Qa4 37.Qe2=) 36.Qd1 (36.Qe2 Re8 37.Ra2 Qd7 38.Qh5 b5 39.cb5 Rh6=) 36...Re6 (36...Re8 37.Nh5 Qd7 38.Nf4=) 37.Ra1 Qe8 38.Qh5 Re5 39.Qg4 g6 40.Qf4 (40.Rd1 b5=) 40...Qe7 41.f3 (41.Rca2!?=) 41...ef3-/+ 42.e4 Qg5 (better 42...fg2 43.Kg2 Rd7-/+) 43.Qf3+= Rd7 44.Rca2 Re8 (44...Qh4 45.Rf2=) 45.Rd1 Kg7 46.Rf2 (46.Rf1 Re5+=) 46...a4= 47.d6 (47.Rff1 a3=) 47...Kh8 (47...Re6!? 48.Ne2 Qe5-/+ (48...Red6?? 49.Rd6 Qe7 50.Rd7 Qd7 51.Qf6 Kh7 52.Kh2+-; 48...Rdd6 49.Qf7 Kh6 50.Qf8 Kh5 51.Qh8 Qh6 52.Nf4 Kg5 53.Ne6 Kh5 54.g4 Kh4 55.Qh6 Kg3 56.Rg2 Kf3 57.Qf4)) 48.Rd5 Re5 49.Rd1 Re8 50.Rd5 Re5 51.Rd1 ½-½. peonsetima (2415) - aperturaf (2470), gameknot.com, 2019. (=1.Nf3 d5 2.b4 Nf6 3.e3 e5 4.Ne5 Bb4)

5.Be2 Nbd7 6.f4 0-0 7.Bb2 Ne4 8.0-0 c6 9.Bf3 Nd6 10.Nd3 Ba5 11.a4 Re8 12.Re1 Nb6 13.Bc3 Nbc4 14.Nc1 Bc7 15.Nb3 Nf5 16.Na3 Ncd6 17.g3 Ne4 18.Bb2 Bd6 19.Nb1 Bb4 20.a5 Nc5 21.Bc3 Nb3 22.cb3 Be7 23.Bb2 Be6 24.Qc2 Rc8 25.Ra4 c5 26.Ra1 Qd7 27.Qd3 g6 28.Na3 Red8 29.Bg2 Bf8 30.g4 Nh4 31.h3 h5 0–1. Nett,Philipp (2145) – Broyles,Jack (2215), CL1–2008.03.01, 2008.

6.0-0 c5 7.Nd3= Na6 8.Nb4 Nb4 9.Ba3 Bf5 10.d3 Qa5 (10...Qe7 11.Bb2=) 11.Bb2= Qb6 12.Nd2 d4 (12...Qe6!?=) 13.Nc4+/- Qd8 14.ed4 cd4 15.Bf3 a5 (15...b5 16.Ba3 Nc2 17.Qc2 bc4 18.Qa4+/-) 16.a3 (16.Bb7 Rb8 17.Bf3 Be6+/-) 16...Nc6 17.Re1 Be6 18.Ne5 (18.Rb1 Rb8+=) 18...Ne5 (18...Qb6 19.Bc1=) 19.Re5+= Qb6 20.Qc1 (20.Bc1 Bd7+=) 20...Rfd8= 21.a4 Bd5 22.Bd5 Rd5 23.Re2 Rc8 24.Ba3 h6 25.Qf4 Qc6 26.Bb2 Exerts pressure on the isolated pawn 26...Rcd8 27.h3 (27.f3 b6=) 27...Rg5=+ 28.f3 (28.g4 Qb6 29.Bc1 Nd5=+) 28...Nh5-/+ 29.Qh4 (29.Qd2 Ng3 30.Re7 Nf5-/+) 29...Qf6 (29...Ng3 30.Ree1 Nf5-/+ (30...Qc2?! 31.Bc1 Ne2 32.Re2 Qe2 33.Bg5 hg5 34.Qg5 Qe3 35.Qe3 de3 36.Ra3=)) 30.Qf2?? (better 30.Re4 Ng3 A) 31.Bd4?? Rd4 32.Rd4 Ne2 33.Kf1 Nd4-+ (33...Qd4?! 34.Qd4 Nd4 35.c3-+); B) 31.Rg4 Rg4 32.Qf6 gf6 33.fg4=+) 30…Nf4-+ (30...Nf4 31.Qf1 Nh3 (31...Ne2?! 32.Qe2 Qc6 33.Ra2-+) 32.Kh2 Nf4-+) 0-1. Uddin,S (1915) - Rahman,Zia (2450), 1st SAARC Open, 2019. (=1.Nf3 d5 2.e3 Nf6 3.b4)

6.0-0 Bd6 7.Bb2 Re8 +=.

6.0-0 Bd6 7.Nf3 c5 8.c4 d4 9.ed4 cd4 10.d3 Nc6 11.Nbd2 Re8 12.Nb3 The isolani on d4 becomes a target 12...Qe7 13.Re1 (13.Nbd4?? Nd4 14.Nd4 Qe5-+; 13.Nfd4?? Nd4 14.Nd4 Qe5-+) 13...Bg4 14.Bd2 (14.Nbd4? Nd4 15.Nd4 Qe5-+; 14.Nfd4? Nd4 15.Nd4 Qe5-+) 14...Bc7 15.g3 (15.Nbd4?? Nd4 16.Nd4 Qd6-+) 15...Qd7 16.Nc5 Qd6 17.Nb3 Re2 (better 17...Rad8!?=+) 18.Qe2+= Qd7 19.h3 Re8 20.Qd1 Re1 21.Be1 Bh3 22.Nh4 h6 23.Qe2 g5 24.Nf3 Bg4 25.Bd2 b6 26.Kg2 Kg7 27.Bc1 Bd6 28.Bb2 Increasing the pressure on the isolated pawn on d4 28...Bc5 29.a3 Qb7 30.Nbd2 (30.Nc5 bc5 31.Rf1 Ne5 32.Qe5 Qf3 33.Kh2 Bc8-+) 30...Bh5 31.Rh1 Bg4 32.Kh2 a5 33.Re1 Qc8 34.Kg2 Qf5 35.Rb1 h5 36.Rh1 Qg6 37.Kf1 a4 38.Kg1 h4 39.Qe4 0-1. jon_lord (2195) - alcol1960 (2500), League division A2, lichess.org, 2022.

6.0-0 Re8 7.Bb2 Nbd7 8.Nd3 Be7 9.Nc3 c5 10.Rb1 b6 11.Nf4 Bb7 12.d4 Bd6 13.Bf3 Bf4 14.ef4 a6 15.dc5 Nc5 16.Re1 Re1 17.Qe1 Qd6 18.Ne2 d4 19.Bb7+/– Nb7 20.Bd4 b5 21.c4 Re8 22.cb5 ab5 23.Bf6 Qf6+/– 24.Rb5 Qa6 25.Rb2 Nd6 26.Rc2 Rd8 27.h3 Re8 28.Qb4 Re4 29.Nd4 h6 30.Rc6 Qc6 31.Nc6 Rb4 32.Nb4 Kf8 33.a4 Ke7 34.a5 Nb5 35.a6 Kd6 36.Nc2 Kc6+/– 37.Kf1 Kb6 38.Nb4 Ka7 39.Ke2 Nc7 40.Kd3 Na6 41.Na6 Ka6 42.f5 Kb5 43.Kd4 Kc6 44.Ke5 Kd7 45.f6 g5 46.Kf5 Kd6 47.Kg4 Ke6 48.Kh5 Kf6 49.Kh6 Kf5 50.Kg7 f6 51.g3 Ke6 52.h4 gh4 53.gh4 Kf5 54.h5 (54…Ke5 55.h6+–) 1–0. Rosner,Dirk – Gallati,Werner, Tiger SC, 2001.

6.Bb2 Nbd7 7.Nd7 Bd7 8.0-0 Bd6 9.d3 b5 10.Bf3 c6 11.Re1 Be6 12.g3 Re8 13.Nd2 Be7 14.Nb3 c5 15.Nc1 Nd7 16.Rb1 a6 17.Ne2 Bf6 18.Nf4 Bb2 ½–½. Taulien,Hans_Juergen (2380) – Morrow,Wolff (2240), corr WS/M/346 ICCF, 2011.

6.c4 Qe7 7.Bb2 Nc6 (7...Nbd7 8.Nd7 Bd7 9.Qb3+=) 8.f4 (8.Nc6 bc6 9.Qa4 Bd7=) 8...dc4 (8...Ne5 9.fe5 Ne4 10.0-0= (10.cd5?? Qh4 11.g3 Ng3 12.hg3 Qh1 13.Bf1 f6–+)) 9.Nc4 (9.Nc6 bc6 10.a3 Bd6=) 9...Be6+= 10.0-0 Rad8 11.a3 Bc5 12.Kh1 (12.Qc2 Bd5+=) 12...Bc4 (12...a6 13.Qc2+=) 13.Bc4 Be3 (13...Rfe8 14.Qc2=) 14.Re1= Rfe8 (better is 14...Qc5!? 15.Bf6 gf6 16.Qg4 Kh8 17.Re3 Qc4+=) 15.Qc2+/– Qe4 (15...Qd6 16.de3 (16.Re3?? Re3 17.Qc1 Ree8–+) 16...Re3 17.Rf1+/–) 16.Qb3 Ng4 17.Bf7 (17.de3? Qf4 18.Bf7 Qf7 19.Qf7 Kf7–+; 17.Re3 Qf4 18.g3 Qf2 19.Re8 Re8 20.Bf7 Kh8 21.Bg7 Kg7 22.Qc3 Nce5 23.Qe5 Re5 24.d4 Qh2) 17...Kh8 (17...Kf8 18.de3 Ne3 19.Re3 Qe3–/+) 18.de3= (18.Re3 Qf4 19.Re8 Re8 20.Bg7 Kg7 21.Qc3 Nce5 22.Qe5 Re5 23.d4 Qh2) 18...Ne3 19.Re2 (19.Re3 Qe3 20.h3 Qe1 21.Kh2–+) 19...Na5 (19...Rd1 20.Qd1 Nd1 21.Nc3 Qe2 22.Ne2 Nf2 23.Kg1 Re2 24.Rb1–/+) 20.Nc3 Nb3 21.Ne4 Na1 22.Nc3 (22.Nf2 Nac2 23.Be8 Re8=) 22...Re7 (22...Nac2 23.Be8 Re8 24.Bc1+=) 23.Ba1 Rf7 24.Re3 Rf4 25.Kg1 Rff8 (25...c5 26.Re1–/+) 26.Re7+= Rfe8 27.Re8 Re8 28.Kf2 c5 29.a4 (29.Nb5 Rd8+=) 29...b6–/+ 30.Bb2 Kg8 31.h3 Kf7 32.h4 a6 33.Ba3 (33.g4 Rd8 34.Ne4 c4–/+) 33...Rd8 34.Ke2 (34.Ke3 c4 35.Bb2 Rd3 36.Ke2 Kg6–/+) 34...Rd4 35.g3 Ke6 36.Bc1 c4 37.a5 (37.Kf2 Kf5–+) 37...ba5–+ 38.Na4 Kf5 39.Bf4? (39.Be3 Rd6–+) 39...h6 (better is 39...Rf4 40.gf4 Kf4–+) 40.Be3 Rd8 (40...Rd6 41.Kf3–+) 41.Bf4 (41.Bb6 Rd5–+) 41...g5 42.hg5 hg5 43.Bc7 Rd3 (43...Rd5!? 44.Nc3 Rd7 45.Ba5–+) 44.Nb6 (44.Nb2!? Rd4 45.Ba5–+) 44...Ke6–+ 0–1. Cirulis,Ilmars (1790) – Nichols,Scott (2315), FICGS, 2016.

4.b5 a6 5.Bb2 (---> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.Nf3).

4.b5 a6 5.c4 ab5 6.cb5 Bb4 7.Qb3 Qe7 8.Nc3 0-0 9.Bb2 c5 10.bc6 bc6 11.d4 c5 12.dc5 Bc5 13.Bb5 Bb7 14.0-0 Nc6 15.Rfe1 Rfb8=+ 16.Rac1 h6 17.a4 d4 18.ed4 Nd4 19.Nd4 Bd4 20.Rcd1 Rd8 21.Ba3? Qc7–+ 22.Ne2? Ng4 23.Ng3 Bf2 24.Kh1 Rd1 25.Rd1 Ne3 26.Rg1 Bg1 27.Kg1 Ng2 28.Ne2 Qb6 29.Kf1 Ne3 30.Ke1 e5 31.Bb2 Qc5 32.Bd7 Rb8 33.Bc3 Ng2 34.Kf1 Nh4 35.Bb5 Bg2 36.Ke1 Nf3 37.Kd1 Nh2 38.Qc2 Ng4 39.Qd2 Nf2 40.Kc2 Ne4 41.Qd3 Nc3 42.Nc3 e4 43.Qg3 Rc8 44.Ba6 Rc7 45.Kb3 Bf3 46.Nb5 Qe3 47.Kb2 Qd2 48.Ka3–+ Qd3 49.Kb4 Rc4 50.Ka5 Qd8 51.Nc7 Rc7 52.Bb5 Ra7 53.Kb4–+ Bd1 54.Ka3 Qe7 55.Kb2 Ba4 56.Ba4 Ra4 57.Qb8 0–1. COMP – NN, 1994.

4.b5 a6 5.c4 Be7 6.Bb2 0-0 7.a4 ab5 8.ab5 Ra1 9.Ba1 Nbd7 10.Qc2 c6 11.Be2 cb5 12.cb5 Bd6 13.0-0 e5 14.d3 Qe7 15.Nbd2 Nb6 16.Qc3 Re8 17.Qa5 Nbd7 18.Rc1 e4 19.de4 de4 20.Nd4 Qe5 21.g3 Qg5 22.Nc4 Bb8 23.Qa8 h5 24.Nd6 Bd6 25.Rc8 Rc8 26.Qc8 Kh7 27.Qb7 h4 28.Kg2 Ne5 29.Qa6 Bc5 30.Qc8 Nfd7 31.Nc6 h3 32.Kh3 Qf5 33.g4 Qf2 34.Be5 Ne5 35.Ne5 Qe3 36.Bf3 Qh6 37.Kg3 Bf2 38.Kf2 Qh2 1–0. Grunberg,M (2460) – Dumitrache,D (2505), Bucharest, 2002.

4.b5 c5 5.Bb2 Bd6 6.Be2 0-0 7.0-0 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 Nbd7 11.c4 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.b5 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 c5 8.Nf3 Bd6 9.c4 0-0 10.Be2 Nbd7 11.0-0).

4.b5 c5 5.c4 Bd6 6.Nc3 0-0 7.Be2 Nbd7 8.a4 (8.d3 Ne5=+) 8...Ne5 (8...dc4 9.0-0–/+) 9.d4 (9.Ne5 Be5 10.0-0 Ne4=+) 9...cd4 (9...Nc4 10.dc5 Bc5 11.0-0–/+) 10.Nd4 (10.Qd4 Nc4 11.Bc4 dc4 12.Qc4 e5=+) 10...Bb4 (10...Nc4 11.Bc4 dc4 12.Ba3 Ba3 13.Ra3–/+) 11.Bd2 (11.Qb3 Qa5 12.Bb2 dc4 (< 12...Nc4 13.Bc4 dc4 14.Qc4=+) 13.Bc4 Ne4=+ (13...Nc4?! 14.Qc4 Nd5 15.Nde2=+)) 11...dc4 12.f4 Nd3 (12...Bc3 13.Bc3 Nd5 14.Qd2–/+) 13.Bd3 cd3 14.0-0 (14.Qb1 Qe7–/+) 14...Qc7 (14...Bc5 15.Nb3 Be7 16.a5–/+) 15.Rc1 (15.Na2!? Bd6 16.Bb4=+) 15...Bc5 16.Na2 e5 (better is 16...Qd6 17.Bc3 Ba3=+) 17.fe5? (17.Bb4 Ne4 18.Bc5 Nc5 19.Nb3+=) 17...Qe5–+ 18.Bc3?? (better is 18.Rc5 Qc5 19.Bb4–+) 18…Qe3 (19.Kh1 Bd4–+) 0–1. dusterstar – knight67, internet, 2007.

4.b5 Bd6 5.Nc3 0-0 6.Bd3 e5 7.Be2 c6 8.Bb2 Bg4 (8...a6!? 9.a4 e4=+) 9.Ne5= Be5 10.Bg4 d4 (10...cb5 11.Rb1 b4 12.Nb5 Bb2 13.Rb2=) 11.ed4 Bd4 12.0-0 (12.a4 Ng4 13.Qg4 Re8 14.Kf1 a6=) 12...cb5 13.Rb1 (13.Bf3 Nc6=) 13...Ng4 (13...b4 14.Bf3 bc3 15.Bb7 cb2 16.Ba8–/+) 14.Qg4 Qf6?? (better is 14...b4 15.Nd1 Bb2 16.Rb2 Nc6=) 15.Nd5+– (15...Bb2 16.Nf6 Bf6 17.Rb5+–) 1–0. gtate (2305) – danielmarcolino (2400), net–chess.com, 2006.

4.b5 Bd6 5.d4 0-0 (5...a6 6.c4 dc4 7.Bc4 ab5 8.Bb5 Bd7 9.Nc3=+) 6.c4=+ dc4 7.Bc4 c6 8.0-0 (8.a4 a6 9.bc6 Nc6=+) 8...cb5 (8...a6 9.bc6 Nc6 10.a4=) 9.Bb5= Bd7 10.Bd3 Nc6 11.Nc3 (11.Ba3 Ba3 12.Na3 Nb4=) 11...Rc8 12.Bd2 Nb4 13.Bb1 Nbd5 (13...Qc7 14.Qe2=+) 14.Nd5= ed5 15.Ne5 Be5 (15...Ne4 16.Be4 de4 17.Qb1=) 16.de5 Ng4 17.h3 (17.f4 d4 18.Qe2 de3 19.Be3 Qa5=) 17...Ne5= 18.Bh7 Kh7 19.Qh5 Kg8 20.Qe5 Bb5 (20...Re8 21.Qd4=) 21.Rfd1 Re8 22.Qd4 Rc4 (22...a6 23.Be1=) 23.Qa7+= Qg5 24.e4 Qg6 25.ed5 Rh4? (better 25...Bd7 26.Qa3 Re5+=) 26.Kh2?? (better 26.Qb7 Be2 27.Re1+–) 26...Bd7 (better 26...Qd6 27.Kg1 Ra4=+) 27.Be3?? (better 27.Re1!? Qd6 28.Kg1 Re1 29.Re1 Qd5 30.Qb8 Kh7 31.Qg3+=) 27...Qh5 (27...Bh3 28.Bg5 Qg5 29.g3 Bg4 30.gh4 Qh4 31.Kg2 Qh3 32.Kg1 Bf3 33.Qb7 Qg2) 28.Qb7?? (better 28.Rd4 Rh3 29.gh3 Re3 30.fe3 Qh3 31.Kg1 Qg3 32.Kh1 Qh3 33.Kg1 Qg3 34.Kh1 Qh3 35.Kg1=) 28…Bh3! 1–0. Shabanov,Nurlan – Akhundov,Teymuraz, Aydin Guseinov Memorial – Blitz, 2016.

4.b5 Bd7 5.Bb2 g6 6.c4 Bg7 7.a4 0-0 8.Na3 b6 9.cd5 Nd5 10.Bg7 Kg7 11.d4 c6 12.Qb3 Qe7 13.Rb1 Rc8 14.Bc4 a6 15.Bd5 cd5 16.ba6 Ra6 17.Nb5 Nc6 18.0-0 Na5 19.Qd1 Nc4 20.h4 Ra5 (20...Rca8) 21.Ne5 Bb5 22.Rb5 Rb5 23.ab5 Ne5 24.de5 Qh4 25.Qa1 Rc5 26.Qa6 Qb4 27.Qb6 Rb5 ½–½. Raine,Marcus – Zivanovic,Andjelija, Club Championship (Box Hill), 2000.

4.c4 Bb4 5.a3 Ba5 6.Bb2 0-0 7.Be2 dc4 8.Bc4 Nbd7 9.0-0 a6 10.a4 b6 11.d4 Bb7 12.Bc3 Bc3 13.Nc3 Qe7 14.Ne5 (14.Qb3 c5-/+) 14...Ne5 15.de5 Nd7 16.f4 Qb4 17.Qb3 Qb3 18.Bb3 Nc5 19.Bc2 Rad8 20.Rfd1 f6 21.ef6 gf6 22.Kf2 f5 23.g3 Rd6 (23...Bc6 24.Rd4-/+) 24.Rd6 cd6 25.Rb1 Nd7 26.Rb2 Rc8 27.Ne2 Kf7 28.e4? (better 28.Ke1-/+) 28...fe4-+ 29.g4 d5 30.h4 e5 31.fe5 (31.f5 Rb8-+) 31...Ke6 32.Bb3 Ke5 33.Kg3 (33.Bd1-+) 33…d4 0-1. Darkseid (1770) - witch huntress (2395), ChessWorld.net, 2006. (=1.Nf3 Nf6 2.b4 d5 3.e3 e6)

4.c4 Bb4 5.Qa4 Nc6 6.Ne5=+.

4.c4 Nbd7 5.c5= a5 (5...e5 6.Bb2 e4 7.Nd4=) 6.Qa4 c6 7.d4 b5 8.Qb3 ab4 9.Bd2 e5 10.Bb4 e4 11.Nfd2 Be7 12.Nc3 0-0 13.Be2 Ne8 (13...Nb8 14.a4=) 14.a4 Nc7 15.0-0 ba4 16.Ra4 Rb8 17.Rfa1 f5 (17...Bh4 18.Ra7+=) 18.Qd1 (18.Ra7 Bg5+–) 18...Qe8 (18...Bg5 19.Ba5=) 19.Ra7 Ne6 Black intends f4 20.Qa4 Nf6 21.Ra8 Ra8 22.Qa8 f4 23.Na4 (better 23.Ra7!?=+) 23...f3–/+ 24.gf3? (24.Bf1!? fg2 25.Bg2–/+) 24...Nd4!–+ 25.Bf1 (25.ed4 Qg6 Combination) 25...Nf3 26.Nf3 ef3 27.Nb6 (27.Nc3–+) 27...Qg6 28.Kh1 Ng4 (better 28...Bh3 29.Bh3 Ra8 30.Ra8 Kf7 31.Ra1–+) 29.Be1 (29.Qa2 Ba6 30.Bh3–+) 29...Qh5 30.Qb8 Ba6!! 31.Qg3 (31.Ra6 Rb8 Discovered attack; 31.Ba6 Rb8 Mate attack) 31...Bf1 32.Nd7 (32.Kg1 Bh4 33.Qd6 Qg5–+) 32...Rd8 33.Ra4 Nh2 34.Bc3 (34.Qh2 Qg6 35.Qg3 Qg3 36.fg3 Bg2 37.Kh2 Rd7 38.Bb4–+) 34...Ng4 35.Kg1 Bg2 36.Ra1 0–1. Wong,Ho Cheung (2040) – Aoshima,Mirai (2280), LEAP International Open Chess Champions, 2018.

4.Ne5 Bb4 5.Bb2 –/+.

4.Ne5 Bd6 5.d4 a6 6.a3=+ b6 7.Be2 Nbd7?? 8.Nc6+– Bb7 9.Nd8 Rd8 10.Bb2 b5 11.Nd2 Ng4 12.Bg4 f5 13.Bh5 g6 14.Bf3 Nf6 15.0-0 Ng4 16.Bg4 fg4 17.Qg4 Kd7 18.Rae1 Rhf8 19.Nf3 Rf5 20.Ne5 Ke7 21.Qh4 Ke8 22.Qh7 Be5 23.Qg6 Kd7 24.de5 Rdf8 25.Rd1 Ke7 26.f4 Bc6 27.a4! ba4 28.b5! Bb5 29.Ba3 Kd8 30.Bf8 Rf8 31.Rf3 Re8 32.e4 Kc8 33.ed5 Kb7 34.de6 Kc8 35.Qe4 c6 36.Rfd3 Kc7 37.Rd7 Kb6 38.e7 (38...Rg8 39.Rd8 c5 40.R1d6 Kc7 41.e8N Re8 42.Qh7 Re7 43.Qe7 Bd7 44.Qd7#) 1–0. lilgia (1615) – tuaku, internet, 2007.

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

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

4.a3 a5 5.b5 c5 6.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.e3 e6 4.a3 a5 5.b5 c5 6.Nf3).

4.a3 c5 (--> 1.b4 e6 2.a3 Nf6 3.Nf3 d5 4.e3 c5).

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

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

4.Ba3 e6 5.d4 a5 6.b5 Ba3 7.Na3 Qd6 8.Nb1 Qb4 9.Qd2 Qb2–/+ 10.Qc3 Qc1 11.Ke2 Bc2 12.Nbd2 Bd1 13.Kd3 Qc3 14.Kc3 Bf3 15.gf3 Nbd7 16.Rg1 0-0 17.Bg2 c5 18.bc6 bc6 19.Rab1 Rab8 20.f4 c5 21.dc5 Nc5 22.Kd4 Nfd7 23.f5 Rfc8 24.Rb8 Rb8 25.fe6 fe6 26.Rb1 Rb1 27.Nb1 Kf7 28.Nc3 Ke7 29.h4 Na6 30.e4 de4 31.Be4 ½–½. Lindberg,Rune – Pakula,Alexej B, MCO, 1996.

4.b5 e6 5.Bb2 Be7 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.b5 Be7).

4.Nc3 e6 5.Rb1 Nbd7 6.Bd3 Bd3 7.cd3 Be7 8.0-0 0-0 9.Qb3 c6 10.Bb2 Qb6 11.Ne2 a5 12.Bd4 Qb4 13.Qc2 Qd6 14.Rb7 c5 15.Bc3 Rfc8 16.Rfb1 e5 17.d4 cd4 18.ed4 e4 19.Ne5 Bd8 20.g3 a4 21.Qd1 Ba5 22.Nd7 Nd7 23.Qa4 Bc3 24.Qd7 Qd7 25.Rd7 Bd2 26.Rb2 (26.Rb2 Bg5 27.Rd5+/-) 1-0. jon_lord (2155) - vekiv (2195), League division B1, lichess.org, 2022.

4.c4 c6 5.Nc3 e6 6.a3 Nbd7 (6...dc4 7.Bc4 b5 8.Be2+=) 7.Qb3 (7.Bb2 dc4 8.Bc4 Bd6=) 7...Be7 8.Be2 0-0 9.Bb2 dc4 10.Bc4 a6 11.0-0 b5 12.Be2 c5 13.Nh4 c4 14.Qd1 Bd3 15.Bd3 cd3 16.f4 (16.Nf3 Nb6+=) 16...Nb6–/+ 17.Nf3 Nc4 18.Qb3 Rc8 19.a4 (19.Rfc1 Qd7+=) 19...Nd5 (19...Nb2 20.Qb2 Rc4 21.Na2–/+) 20.Nd5 (better is 20.ab5!? ab5 21.Nb5 Nb2 22.Qb2+=) 20...Qd5–/+ (20...ed5?! 21.ab5 Nb2 22.Qb2 ab5 23.Qa3+=) 21.Bd4 Ne3!–+ 22.Qd3 Nf1 23.Rf1 Rfd8 24.Qb1 ba4 25.Qa1 f6 26.Bc3 Rc4 27.Qa4 Rf4 28.d4 Rc8 29.Be1 Qc6 30.Qa3 Rf5 31.g4 Rb5 32.g5 a5 33.gf6 gf6 34.Bh4 Qe4 35.Qa4 Qd5 36.ba5 Ra5 37.Qd1 Ra2 38.Qe1 Kh8 39.Qe3 Rg8 40.Kh1 Rg6 41.Rg1 Kg7 42.Qf4 Ra3 43.Rg3 Kf7 44.Rg6 Rf3 45.Qf3 Qf3 46.Rg2 Qd1 (46...Qd1 47.Rg1 Qd4–+) 0–1. Ivanets,Vladimir (2230) – Andersson,Kaj (2090), World Seniors, 2009.

4.c4 c6 5.cd5 cd5 6.Bb2 Nbd7 7.a3 e6 8.Nc3 h6 9.Be2 Be7 10.Nd4 Bh7 11.f4 a5 12.b5 0-0 13.0-0 Nb6 14.d3 Bc5 15.Na4 Na4 16.Qa4 Qe7 17.Rac1 Nd7 18.Kh1 Rfc8 19.Qb3 a4 20.Qa2 Qd6 21.Rcd1 Qb6 22.Qa1 Be7 23.Rf3 Bf6 24.Rg3 e5 (24...Rc7!?+=) 25.fe5= Be5 26.Nc6 Bg3 27.Ne7 Kf8 28.Nc8 Qg6 (better is 28...Rc8!? 29.Bg7 Kg8+=) 29.Rc1 (29.hg3?! Rc8 30.Kh2 Nf6+=) 29...Bf2 30.Bd4 (30.Rc7 Be3 31.Qe1+/– (worse is 31.Rd7 Rc8 32.Rd5 Qe6=)) 30...Qg5= 31.Nd6 Be3 32.Rf1 (32.Rc7 Qe7 33.Be3 Qd6 34.Qc3=) 32...Bd4 (better is 32...f6 33.Qc3 Bd4 34.Qd4 Qe5 35.Qe5 Ne5–/+) 33.Qd4 (better is 33.Rf7 Kg8 34.Qd4 Qc1 35.Rf1+/–) 33...Nf6 ½–½. Fries Nielsen,JO (2455) – Percivaldi,Martin (2340), Copenhagen CC, 2015. (=1.e3 d5 2.Nf3 Nf6 3.b4 Bf5)

4.c4 e6 5.a3 c6 (5...a5 6.b5+=) 6.c5 (6.d4 dc4 7.Bc4 b5=) 6...Be7 (6...b6 7.d4+=) 7.Bb2 (7.d4 Nbd7=) 7...0-0 (7...b6 8.cb6 ab6 9.Be2=) 8.d4 Nbd7 (8...b6 9.Bd3=) 9.Be2 (9.Bd3 Bd3 10.Qd3 a5=) 9...b6 10.0-0 a5 11.Nbd2 h6 12.Qc1 Qc7 13.h3 (13.Nh4 Ng4 14.Nhf3 Rfb8=) 13...Rfb8 14.Re1 Ne4 (14...Qb7 15.Bc3+=) 15.Ne4= Be4 16.Bc3 (16.Qd2 bc5 17.dc5 Bf6+=) 16...bc5 17.bc5 e5 18.a4 Bf6 (18...Ra7 19.Qd2=) 19.Bd1 (19.Qd2 Rb7=) 19...ed4 (19...Rb7 20.Qd2=) 20.ed4= Nf8 21.Nd2 Bf5 22.Bc2 Qc8 (22...Bc2 23.Qc2 Ne6 24.Nb3=) 23.Nf3 Bc2 24.Qc2 Qa6 25.Re3 Ne6 26.Rae1 (26.Rc1 Qc4=) 26...Qb7 (26...Qc4 27.Rc1+=) 27.Ra1 Qa6 ½–½. Cirulis,Ilmars (1840) – Carrizo,Jos‚ (2065), FICGS, 2015.

4.c4 e6 5.Qb3 h6 (5...Nc6 6.c5=+) 6.Bb2= Be7 7.Nc3 0-0 8.Rc1 (8.cd5 ed5 9.Nd4 Bg6=) 8...c6 (8...a5 9.ba5 Nc6 A) 10.Qb7? Na5 11.Qb5 A1) 11...dc4?! 12.Ne5= (12.Bc4? c6 13.Qa4 Rb8-+); A2) 11...c6-+; B) 10.a6 Ra6 11.c5=+ (11.Qb7 Rb6 12.Qb6 cb6-+)) 9.Be2 (9.a3 Re8=) 9...Nbd7 (9...dc4 10.Qc4 b5 11.Qb3=+) 10.0-0 (10.cd5 ed5 11.0-0 a5=) 10...a5=+ 11.a3 Ne4 (11...dc4 12.Qc4 Nb6 13.Qb3=+) 12.d4 (12.Ne4 de4 13.Nd4 Bg6=) 12...ab4=+ 13.ab4 dc4 14.Bc4 Qb6 (14...Nb6 15.Be2=+) 15.Ne4= Be4 16.Be6 Bf3 17.Bd7 Bd5 18.Qc2 Ra2 (18...Rfd8 19.Bf5=) 19.Qb1 (better 19.Ra1!?+=) 19...Qb4=+ (worse 19...Bb4 20.Bc3 Ra4 21.Bf5=) 20.Bc3 Qb1 21.Rb1 b5 22.e4 (better 22.Ra1!? Rfa8 23.Ra2 Ra2 24.Ra1=+) 22...Be4-/+ 23.Rbe1 Rd8?? (better 23...Ra7-+) 24.Bh3 (24.Bg4 Bb4 25.Bb4 Rd4=) 24...Bd3 25.Re7 Bf1 26.Kf1 Rc2 27.Re3 Ra8 (better 27...g6!?=) 28.Bf5+/- Rc1 29.Ke2 Ra3?? (better 29...g6 30.Be4 Ra2 31.Kf3 Ra6+/-) 30.Re8 1-0. Afanasiev,Nikita (2515) - Benitez Lozano,J (2350), Titled Tuesday 1st Dec, 2020. (=1.Nf3 Nf6 2.b4 d5 3.e3)

4.c4 e6 5.b5 a6 6.cd5 ed5 (6...Nd5 7.Nd4=+) 7.Bb2 (7.Qa4!?=) 7...ab5=+ 8.Bb5 c6 9.Be2 Bd6 10.Qb3 (10.Nd4 Bd7=+) 10...0-0 (10...Nbd7 11.d4-/+) 11.Qb7=+ Na6 12.Bf6?? (better 12.Ba6 Rb8 13.Qc6 Rb2 14.Nc3=+) 12...Qf6-+ 13.Nc3 (13.Qc6 Rfc8 14.Qc3 Rc3 15.Nc3 Nb4-+) 13…Nb4 0-1. Lance5500 (2360) - halfnatty (2585), lichess.org, 2019.

4.c4 e6 5.Nd4 +=.

4.d4 e6 5.b5 Bd6 6.c4 c6 7.c5= Bc7 8.Qa4 Ba5 9.Bd2+= Bd2 10.Nbd2 0-0 11.Ne5 Qc8 12.Be2 Ne8 13.Qb4 f6 14.Nd3 Nd7 15.Rb1 e5 16.bc6 bc6 17.Qb7 Rf7 18.Qc8 Rc8 19.0-0?? Re7 20.Rfe1?? ed4–+ 21.ed4 Re2! 22.Re2 Bd3 23.Re7 Bb1 24.Nb1 Nf8 25.Ra7 Ne6 26.Ra4 Rb8 27.Nd2 N8c7 28.g3 Ra8 29.Ra8 Na8 30.Nb3 Nac7 31.a4 Kf7 32.Kf1 Kg6 33.Ke2 Kf5 34.f3 h5 35.Ke3 g5 36.Na5 Nd8 37.Nb3 Na6 38.Kd3 Ne6 39.Na5 Nd8 40.Nb3 Ke6 41.Ke3 Kd7 42.f4 Ke6 43.Kf3 Kf5 44.fg5 fg5 45.h3 g4 46.hg4 hg4 47.Ke3 Ne6 48.Na5 Nb4 49.Nb7 Nc2 50.Kd3 Ncd4 51.a5 Ke5 52.Kc3 Nc7 53.Nd8 Ke4 54.Kd2 Nb3 (55.Ke1 Na5–+) 0–1. Misiewicz,Patryck – Recio,Miquel, Open Miami USA, 2007.

4.Nd4 Bg6 5.c4 (5.Bb2 e5 6.Nb3 Nbd7=+) 5...Nbd7 (5...e5 6.Qa4 Nbd7 7.Nf3–/+) 6.c5 (6.cd5 Nd5 7.Bb5 e5–/+) 6...e5–/+ 7.Nf3 a5 8.c6 (8.Ba3 e4 9.Nd4 ab4 10.Bb4 Nc5–/+) 8...bc6 9.Qa4 (9.Bb2!?–/+) 9...ab4 10.Qc6 Bd6 11.a4 0-0 12.Nh4 Nc5 (12...Bh5 13.Nf5 Ra5 14.Nd6–+) 13.Ng6–/+ hg6 (13...fg6 14.Bb2–+) 14.Bb2 Qe8 15.Qe8 Rfe8 16.Bb5 Reb8 17.d4 ed4 18.Nd2? (better is 18.ed4 Nce4 19.f3–/+) 18...de3–+ 19.fe3 Ng4 20.Ke2 Nh2 21.Bc6 Ra6 22.Bd5 Ra4 23.Rag1 (23.Nc4 Ra1 24.Ra1 Ng4–+) 23...Ng4 24.Rh4 (24.Rf1 Ne6–+) 24...Nh6 (24...Nf6 25.Rgh1 Nh5 26.Kd1–+) 25.e4 (25.Rgh1 g5 26.Rh5 g4–+) 25...Nd7 (25...g5 26.Rh5 g4 27.e5–+) 26.Bb3 Ra7 27.g4 g5 28.Rh5 Bf4 29.Nc4 Ra6 (29...Re8 30.Kf3–+) 30.Ne3 (30.Rd1 Nc5 31.Rh3 Ng4–+) 30...Re8 31.Nd5 (31.Bc4 Rb6 (31...Re4?! 32.Ba6 Re3 33.Kd1–+) 32.Bd3 Rb7–+) 31...Re4 32.Kf3 Rae6 33.Ra1 Re3! (34.Ne3 Re3 35.Kg2 Rb3 36.Ra8 Nf8–+) 0–1. Andersson,Lars H – Merten,Rainer, corr SOK–92–80, 1992.

4.Be2 e6 5.a3 Bd6 6.Bb2 (--> 1.b4 d5 2.Bb2 Bf5 3.e3 Nf6 4.Nf3 e6 5.a3 Bd6 6.Be2).

4.Be2 e6 5.a3 Bd6 6.d4 Nbd7 7.Nbd2 a5 8.b5 0-0 9.c4 Ne4 10.Bb2 Nd2 11.Nd2 c6 12.c5 Be7 13.a4 h6 14.0-0 Nf6 15.Nb3 h5 (15...cb5 16.Bb5 Qb8 17.Qd2+=) 16.Qd2 (16.b6 h4+/-) 16...h4 17.f3 h3 (17...cb5 18.Bb5 Qc7 19.Bc3+=) 18.g4+/- Bg6 19.Bc3 Qb8 20.Ba5 Re8 21.b6 Nd7 22.Bc3 Qd8 23.a5 Nb8 24.a6 (24.Rfc1 Bh4+/-) 24...Na6 25.Ba6 ba6 26.Qe2 Qc8 27.Ra2 Qd7 28.Rfa1 f5 29.Ra6 Ra6 30.Ra6 fg4 31.Ra7 Qc8 32.f4 e5 33.b7 Qf5 34.Be1 g3 (34...Qb1 35.Nd2 Qb2 36.Qg4 Bf7 37.fe5 Bc5 38.dc5 Qc1+-) 35.Ra8 (35.fe5?! Bh5 36.e4 A) 36...Be2?? 37.ef5 gh2 38.Kh2+-; B) worse 36...de4 37.Qa2 Rf8 38.Nd2 Kh7 39.hg3+/- (39.Bg3 Bg5 40.Ra3 Bd2 41.Qa1 Qg5 42.Qc1 Bc1 43.Rf3 Qd2 44.Bf2 Qd1 45.Be1 Qe1 46.Rf1 Rf1); C) 36...Qg6=) 35...Qf8 36.Qa6 (36.Bg3?! Ra8 37.ba8R Qa8 38.fe5 Qa3+=; 36.fe5?! Ra8 37.ba8Q Qa8 38.Bg3 Qa3+=) 36...ef4 37.Qc6 Bd8 (37...f3 A) 38.Qg6 f2 39.Kf1 g2 40.Ke2 f1Q (40...fe1R?! 41.Ke1 Bh4 42.Ke2 Qf2 43.Kd3 Qe3 44.Kc2=; 40...fe1Q?! 41.Ke1 Bh4 42.Ke2 Qf2 43.Kd3 Qe3 44.Kc2=) 41.Kd2 g1Q 42.Qg1 Qg1 43.Re8 Qh2 44.Kc3 Qe8-+; B) 38.Qd5 Kh7 39.Bg3 f2 40.Bf2 Kh6+-; C) 38.Bg3 f2 39.Bf2+-) 38.Qg6 (38.Qg6 Re3 39.Ba5+-) 1-0. daxthedog (2145) - marekt (2200), gameknot.com, 2015.

4.Be2 e6 5.a3 Bd6 6.Nh4 Be4=.

4.a3 e5 5.c4 a5 6.Bb2 Nbd7 7.Qb3 Bf3 8.gf3 d4 9.Bg2 a4 10.Qd1 c5 11.0-0 Bd6 12.f4 0-0 (12...ef4 13.ed4 (13.Bb7?! Rb8 14.Bg2 fe3=) 13...cb4 14.Re1 Kf8 15.c5 ba3 16.Ba3+–) 13.Bb7 Rb8 14.Bg2 Qc7 15.h3 Rfe8 (worse is 15...ef4 16.ed4 f3 17.Bf3 cb4 18.c5 (worse is 18.Qa4 Qc4 19.Rc1 Qe6+=) 18...Bh2 19.Kg2+/–) 16.Qa4 de3 17.de3 ef4 18.Nc3 fe3 19.Nb5 Qb6 20.Nd6 Qd6 21.Rad1 Qe6 22.fe3 cb4 23.ab4 Qc4 24.Rf4 Qe6 25.Bd4 Nb6 26.Qc6 Nbd5 27.Bd5 Nd5 28.Qe6 fe6 29.Rg4 e5 30.Bc5 Nf6 31.Rc4 Kf7 32.Kg2 Red8 33.Ra1 Rb7 ½–½. Taulien,Hans_Juergen (2380) – Dunlop,Gordon (2130), WS/M/346 ICCF, 2011.

4.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3).

4.Bb5 c6 5.Be2 e5 (5...e6 6.a3=+) 6.Ne5= Be2 (6...Bb4? 7.Bg4 Bd6 8.Bb2+–) 7.Qe2 Bb4 8.Ba3 Ba3 9.Na3 Qe7 10.Qf3? (better is 10.Rb1–+) 10...Qe5 11.c3 (11.Rb1 Qe7 12.Rb3 Ne4–+) 11...Qe4 12.Qe4 (12.Qg3 0-0–+) 12...de4 13.Nc4 Ke7 14.Rb1 b5 15.Na3 (15.Ne5 Rd8–+) 15...Rd8 16.h3 (16.f3 Rd3–+) 16...a5 17.Ke2 (17.Nc2 Rd3–+) 17...Ra6 (17...Na6 18.c4 b4 19.Nc2–+) 18.Nc2 Nbd7 19.Nd4 Nd5 20.Nf5 (20.f3 Nc5–+) 20...Kf6 21.Nd4 Nc5 22.h4 Nd3 23.g4 h6 24.f3 Ke5 25.a4 ba4 26.f4 N5f4 27.ef4 Nf4 28.Kd1 a3 29.Re1 a2 30.Ra1 Rb8 31.Nf3 Kd5 32.Nh2 Rb1 33.Kc2 Re1 34.Re1 f5 35.gf5 Ng2 36.Ra1 Nh4 37.Ra2 Nf5 38.Ng4 a4 39.Ra1 a3 40.Kb3 h5 41.Nf2 Nd6 42.Rg1 a2 43.Nh3 a1Q 44.Nf4 Ke5 45.Ra1 Ra1 46.Nh5 Nf5 47.c4 Ra7 48.Kb4 g6 49.Kc5 gh5 50.Kc6 h4 51.Kb6 Rh7 52.c5 h3 53.c6 h2 54.c7 h1Q 55.c8Q Qb1 56.Ka6 Qa1 57.Kb6 Qa7 58.Kb5 Nd4 59.Kb4 Qb6 60.Ka4 Qb3 61.Ka5 Qb5# 0–1. REXChess – SuperForte 5, 1994.

4.Nc3 e5 5.a3 e4 (5...a5 6.ba5 e4 7.h3=+) 6.h3 Bh5 (6...ef3?! 7.hg4 d4 8.g5 dc3 9.gf6 Qf6 10.gf3=) 7.g4 Ng4 8.hg4 Bg4 9.Be2 ef3 10.Bf3 Bf3 11.Qf3 c6 12.Bb2 Nd7 13.Ne2 Qe7 14.d3 f6 (14...0-0-0 15.Bd4–/+) 15.Bd4 (15.c4 dc4 16.dc4 0-0-0–/+) 15...a5 (15...Ne5 16.Qf5–/+) 16.b5=+ Qf7 (16...Ne5 17.Qf5=+) 17.bc6 bc6 18.Qg3 (18.c4 A) 18...dc4?! 19.Qc6 Rd8 20.dc4= (20.Qc4?! Qc4 21.dc4 Ne5=); B) 18...Ne5 19.Be5 fe5–/+) 18...c5 19.Bc3 Ra7 20.Qh2 (20.Rb1 Qe7=+) 20...Be7 21.Rb1 a4 22.f3 h6 23.Qg2 h5 24.Qh3 Bd6–/+ 25.Rb5 Ra6 26.Rb7 Rb6 27.Ra7 Rb1 28.Kd2 Rh1 29.Qh1 Qe6 30.Ra8 Bb8 31.Qb1 0-0 32.Ra4= Re8 33.Qg1 d4! 34.Bd4 cd4 35.Nd4 Qh3 36.c4 Ne5 37.Qf2 Bc7 38.c5 Rb8 39.Kc3? Qh1 40.Qe2 Qa1 41.Kd2 Rb2 42.Nc2 Qa2 43.Ke1 Rc2 44.Ra8 Kh7 45.Qc2 Qc2 46.Kf1 Qd3 47.Kf2 Qd2 48.Kf1 Nf3 49.Rc8 Bg3 (50.Rh8 Kh8 51.c6 Qf2#) 0–1. Jonsson,Gudbrandur – Kuni,Richard, TT–07 TSC, 2003.

4.c4 e5 5.Qa4 Qd7 (5...Bd7 6.b5 e4 7.Ne5=) 6.b5=+ Bf3 (6...e4 7.Nd4 c5 8.Nb3=) 7.gf3= Qf5 8.b6 Nbd7 (8...Nc6!? 9.cd5 Nd5=) 9.bc7+= Qf3 10.Rg1 Ne4 11.Rg2 Be7 (11...Bd6 12.Nc3 Nc3 13.dc3 Bc7 14.Rg3+=) 12.Nc3 (12.cd5? Bh4 13.Bb5 Bf2 (13...Qg2 14.Bd7 Ke7 15.Ba3 Nd6 16.Bg4 Qg1 17.Ke2=+) 14.Rf2 Qf2 15.Kd1 Qf3 16.Kc2 Nef6–+; 12.cd5? Bh4 13.Bb5 0-0–+) 12...Nec5 13.Qb5 (better 13.Qc2 dc4 14.Rg7+=) 13...a6=+ 14.Qb1 dc4 15.Rg7 (15.h4–/+) 15...Bh4=+ 16.Nd1? (16.Be2 Qf2 17.Kd1–/+) 16...e4–+ 17.Bg2 (17.Bc4 Ne5 18.Bb5 ab5 19.Qb5 Ned7–+) 17...Qf5 18.Bb2 (18.Ba3!? Rc8 19.Kf1 Rc7 20.f4–+) 18...Rc8 (18...Nd3 19.Ke2 Rc8 20.h3–+) 19.Ke2 (19.Bf1 Nd3 20.Bd3 cd3–+) 19...Rc7 20.h3 Ne5 (better 20...Nf6 21.f3 Rd7–+) 21.Be5–/+ Qe5 22.Rg4 Bf6 (22...Be7 23.Be4 h5 24.Rf4–/+) 23.Nc3 h5 (23...Qd6 24.Be4 h5=+) 24.Rf4=+ Bg5 (24...Re7 25.Be4 Qd6 26.Rf6 Qf6 27.Nd5=+) 25.Re4= Ne4 26.Be4 Attacking the backward pawn on b7 26...Rd7 27.Qb4 b5 (27...Qc7 28.Rb1 Qd8 29.Bb7 Rd2 30.Ke1=) 28.Bc6= Be7 29.Qa5 Qd6 30.Qa6 Kf8 (worse 30...Qd2 31.Kf3 Kf8 32.Rd1 Qc3 33.Bd7+– (33.Rd7 Rh6 34.Qb5 Qc2 35.Qb8 Kg7 36.Re7 Rf6 37.Kg2 Qf2 38.Kh1 Rc6–/+); worse 30...Qd2 31.Kf3 Kf8 32.Rd1 Qc3 A) 33.Rd7 Rh6 34.Qb5 Rf6 35.Kg2 Qe1 36.Qb8 Kg7 37.Qg3 Rg6 38.Qg6 Kg6 (38...fg6?! 39.Re7 Kf6 40.Re4–+) 39.Re7 c3–+; B) 33.Bd7 Qf6 34.Qf6 Bf6 35.Bb5+=) 31.Ne4 (31.Nb5 Qd2 32.Kf3 Rh6–+) 31...Qd3 32.Kf3 Rh6 33.Qb5 Rdd6 34.Qb8 (34.Nd6 Qd6 35.Be4 Qf6 36.Ke2 Qa1 37.Qb8 Kg7 38.Qg3 Kf6 39.Qf4 Kg7 40.Qg3 Rg6 41.Bg6 fg6=; 34.Nd6 Qd6 35.Be4 Qf6 36.Ke2 Qa1 37.Qb8 Kg7 38.Qg3 Rg6 39.Bg6 fg6=) 34...Rd8 35.Qb5 f5 36.Nc5 (36.Qf5?? Rf6 37.Qf6 Bf6–+; 36.Qf5?? Rf6!? 37.Qf6 Bf6–+) 36...Bc5 (36...Qd2 37.Nd7 Rd7 38.Bd7+–) 37.Qc5 Rhd6 (37...Qd6 38.Qd6 (38.Qf5?? Rf6 39.Be4 Rf5 40.Bf5 Qe5–+) 38...Rdd6 39.Bb5 Rd2 40.Bc4=) 38.Bb7 Kf7 39.Rc1 Attacking the isolated pawn on c4. Attacks the isolani on c4 39...R8d7 40.Qb5 Rc7 41.Rg1 Rdd7 (41...Qd2 42.Qe5 (42.Qf5?? Rf6 43.Qf6 Kf6–+) 42...Rb7 43.Qg7 Ke8 44.Qh8 (worse 44.Qb7 Qd5 45.Qd5 Rd5+–) 44...Kf7 45.Rg7 Ke6 46.Qe8 Kd5 47.Rb7+–; 41...Re7 42.Bc6=) 42.Bc6 Rd6 ½–½. Fakler,Udo – Vetter,Udo, DESC, 2001. (=1.Nf3 Nf6 2.b4 d5 3.e3 Bg4)

4.c4 e5=+ 5.Qb3 Bf3 6.gf3 d4 7.c5 Nc6 8.Bb2 Qd7 9.Na3 a5 10.b5 Nb4 11.Rc1 Rd8 12.e4 Be7?? 13.Nc4+– d3 14.Ne5 Qe6 15.Qe6 fe6 16.a3 Nc2 17.Kd1 Nd4 18.Bd4 Rd4 19.Nd3 0-0 20.Nf4?? Ne4=+ 21.Ne6 Rd2 22.Ke1 Rf3 23.Rc4?? Re3!! 24.Be2 Ree2 (25.Kf1 Rf2 26.Ke1 Bh4 27.Re4 Rfe2 28.Kf1 Re4 29.Nc7 Re1#) 0–1. Bowers,D – Quint,D, Boulder Colorado USA, 1987.

4.c4 Bf3 5.Qf3= e6 (5...Nc6 6.cd5 Nb4 7.Bb5 Nd7 8.Qe4 Nd5 9.Qd5+=) 6.a3 a6 (6...a5 7.b5=) 7.Bb2 Nbd7 8.d4 c6 9.Nd2 Be7 10.c5 0-0 11.Bd3 Qc7 12.g4 g6 13.h4 Kg7 14.h5 e5? (better 14...Rae8!?+–) 15.Qg3+– Rac8? (15...g5+–) 16.de5 Ne5 (16...a5 17.ef6 Bf6 18.Qc7 Rc7 19.h6 Kg8 20.Bf6 Nf6+–) 17.Be5 Qd8 18.g5 Kg8 (18...Rh8+–) 19.gf6 Bf6 20.hg6 fg6 21.Rh7! (21.Rh7 Rf7 22.Qg6 Rg7 23.Rg7 Bg7 24.Qg7) 1–0. Ortiz,Clodomiro (2260) – Leurette,Marc_Antoine, FICGS, 2017.

4.d4 e6 5.a3 Bd6 (5...a5 6.ba5 Ne4 7.h4+=) 6.Bb2 (6.c4 a6=) 6...Nbd7 7.c4 dc4 8.Bc4 0-0 9.Nbd2 (9.Nc3 c6=) 9...Qe7 (9...a5 10.ba5 c5 11.Bc3=) 10.Be2 e5 11.Nc4 e4 12.Nfe5 Be2 13.Qe2 Nd5 14.0-0 f6 15.Nd7 Qd7 16.f3 Rae8 17.Rae1 c6 18.Nd6 (18.fe4 Re4 19.Qd3 Re6=) 18...Qd6 19.f4 a6 20.g4 (20.f5 Re7=) 20...h6 (20...Qd7 21.f5=) 21.f5 Kf7 22.Rf2 Rh8 23.Rg2 Reg8 24.Qc2 Qe7 25.Qc5 h5 26.Qe7 Ne7+= 27.h3 hg4 28.hg4 Rh4 29.Kf2 Rgh8 30.d5 Nd5–/+ 31.Bd4 Rh3 32.Rg3 R8h4 33.Reg1 Rg3 34.Kg3+= Rh8 35.Rb1 Ke7 36.a4 b6 37.a5 b5 38.g5 Rh5–/+ 39.gf6 gf6 40.Rf1 Rg5 41.Kh4 Kf7 42.Bc5 Rg2 43.Rd1 Rg5 44.Rf1 Ne7 45.Be7 Ke7 46.Rf4 Kd6 47.Re4 Rf5 48.Re8 Re5 49.Ra8 Re3–+ 50.Ra6 Re4 51.Kh5 Rb4 52.Kg6 Ra4 53.Kf6 b4 54.Kf5 Kd5 55.Ra8 Kc5 56.Ke6 b3 57.a6 Ra6!! 58.Ra6 b2 59.Kd7 b1Q 60.Rc6 Kb5 (60...Kb5 61.Rf6 Qd3 62.Rd6 Qh3 63.Ke7 Kc4 64.Kf7 Kc5 65.Rf6 Kd5 66.Ke7 Qh4 67.Kf7 Qg4 68.Ra6 Qd7 69.Kf6 Qd8 70.Kf7 Ke5 71.Re6 Kf5 72.Re7 Qd5 73.Kg7 Kg5 74.Rf7 Qd8 75.Rf1 Qd4 76.Kf8 Kg6 77.Ke7 Qe4 78.Kd6 Qd3 79.Ke5 Qf1 80.Kd5 Kf5 81.Kd4 Qb5 82.Ke3 Qc4 83.Kf3 Qd3 84.Kf2 Kf4 85.Ke1 Qc2 86.Kf1 Kf3 87.Ke1 Qc1; 60...Kd4 61.Rd6 Ke4 62.Re6 Kf5 63.Rc6 Qb4 64.Rd6 Qb7 65.Kd8 Qf7 66.Rd1 Qg8 67.Kd7 Qe6 68.Kd8 Qb6 69.Kc8 Qa6 70.Kd8 Ke6 71.Re1 Kf6 72.Rd1 Qa5 73.Kc8 Ke7 74.Rd7 Ke8 75.Ra7 Qd8 76.Kb7 Kd7 77.Ra1 Qc7 78.Ka6 Qc5 79.Re1 Kc7 80.Re6 Qb4 81.Re7 Qe7 82.Kb5 Qe4 83.Kc5 Qd3 84.Kb4 Kb6 85.Ka4 Kc5 86.Ka5 Qb5) 0–1. Blanco Perez,David (2180) – Rodriguez Aguilera,Juan (2225), Dos Hermanas FM Elo, 2001. (=1.Nf3 Nf6 2.b4 d5 3.e3)

4.d4 e6 5.c3 Bd6 6.Be2 Ne4 7.Nfd2 Be2 8.Qe2 Qe7 9.Ne4= 0-0?? 10.Nd6+– Qd6 11.0-0 b6 12.e4 c6 13.e5 Qe7 14.Qg4 f6 15.Bf4 Nd7 16.Nd2 fe5 17.de5 Qf7 18.Bg3 (18…a5 19.Nf3 ab4 20.cb4+–) 1–0. eros129in – Quentinovich, internet, 2007.

4.d4 e6 5.Qd3 Bb4 6.c3 Bd6 7.Qb5 Nc6 8.Qb7= 0-0?? 9.Qc6+– Rb8 10.Qa6 .Ra8 11.Na3 Bf3 12.gf3 e5 (13.Nb5 Re8+–; 12...Be7 13.Rb1+–). FUR – OCSCHESS, internet, 2007.

4.Nd4 e5–/+ 5.Nb5 c6 6.h3 Nf6 –+ (6...cb5?! 7.hg4 Bb4 8.Bb2=+; 6...Bb4?! 7.a3 Be7 8.hg4=+).

4.Nd4 e5–/+ 5.Nb5 Qf6?? 6.f3+/– (< 6.Nc7 Kd8 7.f3 Kc7 8.fg4 Bb4=+) 6...e4 7.fg4 (7.N1c3 Ne3 A) 8.Nc7 Kd8 9.Qe2 Nc2 (9...Kc7?! 10.Qe3 Kd8 11.fe4=+) 10.Kd1 A1) 10...Bb4?! 11.N7d5 Qg6 12.Qc4=+ (12.Kc2?? ef3 13.Qd3 Bf5 14.Nb4 Bd3 15.Bd3 fg2–+); A2) 10...Na1 11.Na8 A21) 11...Bb4 12.Nd5 Qc6 13.Nb4 (13.Qe4?? Qa4 14.Ke2 Re8–+) 13...Qa4 14.Ke1 Qb4 15.fe4–/+; A22) 11...ef3 12.Qf3 Qf3 13.gf3 d4= (13...Bb4 14.Nd5 b5 15.Nb4+–); B) 8.de3 Bb4 9.Nc7 Kf8 10.Bd2 (10.Na8?! Bc3 11.Kf2 Ba1=) 10...Bc3 11.Rb1 (11.Nd5?! Bd2 12.Kd2 Qe5 13.fe4 Be6=) 11...ef3 12.Qf3+– (12.Na8 f2 13.Ke2 Bg4 14.Kd3 Bd1 15.Rd1 Be5 16.Bb4 Ke8–+)) 7...Qa1=+ 8.Nc7 Kd8 9.Na8 Qb1 10.b5 (better is 10.Be2!? Bb4 11.0-0=) 10...b6–/+ 11.g5 Bb7 12.c4? (better is 12.Nb6 ab6 13.Be2–+) 12...Ba8 13.g3 (13.a3 Nd7 14.d3 Nc5 15.de4 Nb3–+) 13...d4 14.ed4 Bb4 (14...e3 15.Rg1 Bf3 16.Be2 Be2 17.Ke2 Qa2 18.Kd3–+) 15.c5? (better is 15.Be2–+) 15...Re8 16.Bc4 e3 17.a3?? (17.0-0 bc5 18.Qg4 ed2 19.Bd2 Qc2 20.Bf7 Bd2–+) 17...Ba5 (17...ed2 18.Kf2 Qf5 19.Kg1 Re1 20.Qe1 de1Q 21.Bf1 Qff1) 18.Be2 (18.0-0 Qe4 19.c6–+) 18...Bh1 19.cb6 ed2 20.Bd2 Qd1 (better is 20...Re2 21.Ke2 Bf3 22.Kf3 Qd1 23.Kg2 Qd2 24.Kh3 Bb6–+) 21.Kd1 ab6 22.Bf4 (22.Ba5 ba5 23.Bd3 Nd7–+) 22...Re2 (better is 22...Bd5 23.Bg4 Re4 24.Bf5 Rd4 25.Kc2–+) 23.Ke2 Kc8 24.h4 Bc3 25.Be5 g6 26.Kd3 Bb2 27.g4 (27.Bd6 Bd5–+) 27...Ba3 28.Kc4 Bf3 29.d5 Bg4 30.d6 (30.Bd4 Nd7–+) 30...Be2 31.Kb3 Bc5 32.Ka4 (32.Kc3–+) 32...Bd1 0–1. Hostage – Thrustagain, HCL–C2232 playchess.de, 2003.

4.Be2 c6 5.0-0 e6 6.a3 Bd6 7.Bb2 0-0 8.c4 b6 (8...Bf3 9.Bf3 dc4 10.Qc2=+) 9.d4 (9.d3 a5 10.Qa4 dc4 11.dc4 Qc7 12.Bf6 gf6=) 9...c5 (better is 9...Bf3!? 10.Bf3 dc4=+) 10.bc5 bc5 11.Nbd2 Nc6 (11...cd4!? 12.Nd4 Be2 13.Qe2 Nbd7=) 12.dc5+= Bc5 13.Qa4 Rc8 14.cd5 Nd5?? (better is 14...Bf3 15.Bf6 Qf6 16.Bf3 Ne5+=) 15.Qg4+– (15...Nf6 16.Qg5+–) 1–0. jammboy – marnzell, ChessWorld.net, 2006.

4.Be2 Nc6 5.b5= Na5 6.0-0 Qd6 (6...e6 7.d3=) 7.Bb2 c5 (7...Nc4 8.Bc3=) 8.d3 b6 (8...Qb6 9.h3 Bf3 10.Bf3=) 9.Nbd2 e5 (better 9...a6!?+=) 10.Be5 Qe6 11.Bb2 Bd6 12.Nb3 (12.Re1 Rd8+-) 12...Nb7 (12...Nb3 13.ab3 0-0 14.h3+/-) 13.a4 (13.Ng5 Be2 14.Qe2 Qe7+/-) 13...0-0 14.Ng5 Be2 15.Ne6 (better 15.Qe2 Qg4 16.Qg4 Ng4 17.h3 Bh2 18.Kh1+/-) 15...Bd1= 16.Nf8 Bc2 17.Nh7? (better 17.Nc1!? Ng4 18.h3=) 17...Kh7 (17...Nh7!? 18.Nc1-/+) 18.Nc1-/+ Nd7 (18...Ng4 19.h3 Ne5 20.Be5 Be5 21.Ra2-/+) 19.Re1 (19.Ra2 a6 20.Ba1 Bd3 21.Nd3 ab5-/+) 19...c4 20.dc4 dc4 21.Re2 Bf5 (21...Bg6 22.e4-/+) 22.Rd2 (22.e4 Be6-/+) 22...Bb4 (22...a6 23.f3-+) 23.Rd5 (23.Rd4 Be6-/+) 23...Be6 Black gets the initiative 24.Rh5 (24.Rd4 Be7 25.Rd1 Ndc5-+) 24...Kg6-+ 25.Rh4 Nbc5 (25...Be7 26.Rf4-+) 26.Rd4 Ne5 27.Rd1? (27.Rd6 Kf5 28.Na2 Ned3 29.e4 Ke4 30.Bg7 Ba5-+) 27...Ned3 (better 27...c3 28.Ba3 c2-+) 28.Bd4 Nc1 29.Rdc1? (better 29.Bc5 Bc5 30.Rdc1-+) 29...Nb3 30.Rab1 Rd8 (30...Rd8 31.Rd1 c3 32.Bc3 Rd1 33.Rd1 Bc3-+) 0-1. algernon (2560) - vaingrecsky (2175), net-chess.com, 2022.

4.Be2 Nbd7 5.d4 e6 6.a3 c6 7.Bb2 (7.Nbd2 b5=) 7...Bd6 8.Nbd2 Qc7 (8...b5 9.0-0=+) 9.c4= a6 (9...0-0 10.c5 Be7 11.0-0=) 10.c5+= Be7 11.0-0 h6 12.h3 (12.Bd3 0-0+=) 12...Bf5= 13.Ne5 Ne5 14.de5 Nd7 15.f4 0-0 16.Nf3 b6 17.cb6 Qb6 18.Bd4 c5 19.bc5 Nc5 20.Bc5 Bc5 21.Nd4 Be4 22.Bf3 Bf3 (22...Rfd8 23.Rf2=+) 23.Rf3 Rab8 24.Kh2 g6 25.Rg3 Kh7 26.Qd3 Bd4 27.ed4= Rfc8 28.h4 h5 29.Rd1 Rc4 30.Rg5 Kh8 31.Qe3 Qc6 32.Rd3 Rb1 33.Qf3 Rcc1 34.Rh5 Kg7 35.Rg5 Rf1 36.Rc3 Rf3 37.Rc6 Rf4 38.h5 Kh6 39.Rg3 Kh5 40.Ra6 Rd4 41.Ra7 Rh4 42.Rh3 Rh3 43.Kh3 Re1 44.a4 Re5 45.Rf7 Kg5 46.a5 Re4 47.a6–/+ Ra4 48.a7 e5 49.Kg3 Ra3 50.Kf2 d4 51.Ke2 e4 52.g3 Ra2 53.Kd1 d3 54.Re7–/+ Kf5 55.Ke1 Kg4 56.Re4–/+ Kg3 57.Re3 Kg2 58.Rd3 Ra7–+ 59.Rd2 Kg1 60.Ke2 Rf7 61.Rd5 Rf6 62.Rg5 Kh2 63.Ke3 Kh3 64.Ke2 Kh4–+ 65.Rg1 g5 66.Rh1–/+ Kg4 67.Rg1 Kh5 68.Rh1 Kg6 69.Rh3 g4 70.Ra3? Kg5 71.Ra5 Kh4 72.Ra3 g3 73.Ra8 Kh3 74.Rh8 Kg2 75.Rh7 Re6 76.Kd2 Kg1 77.Rh8 g2 78.Ra8 Re5 79.Ra7 Kf2 (80.Rf7 Kg3 81.Rg7 Kf3 82.Rg2 Kg2–+) 0–1. Schmitt,Andre – Klee,Mario, Nuernberg, 1995.

4.Be2 Bf3 5.Bf3= e5 6.0-0 (6.a3!?=) 6...e4 7.Be2 Bb4 8.d3 (8.Bb2 0-0–/+) 8...Bd6 (8...0-0 9.Bb2–/+) 9.c4 (9.Nd2 c6=+) 9...c6 (9...dc4 10.d4–/+) 10.Nc3 (10.Bb2 Qc7 11.h3 dc4 12.de4 Bh2 13.Kh1 Be5–/+) 10...ed3 (10...Qc7 11.h3–/+) 11.Qd3 (11.Bd3 Be5 12.Bb2 dc4 13.Bc4 Qd1 14.Rad1 Nbd7=+) 11...Be5 (11...dc4 12.Qc4 b5 13.Qd4–/+) 12.Bb2 (12.cd5 cd5 13.Rb1=) 12...d4 (12...dc4 13.Qc4 b5 14.Qb3=+) 13.ed4 (13.Na4 b6+=) 13...Bd4 (better is 13...Qd4!? 14.Qd4 Bd4=) 14.Rad1+= c5 15.Nb5 (15.Bf3 Qb6 16.Rfe1 Kd8+–) 15...0-0 (15...Nc6 16.Bd4 Nd4 17.Qe3 Qe7 18.Nc7 Kf8 19.Qe7 Ke7 20.Na8 Ne2 21.Kh1=) 16.Nd4+/– cd4 17.Bd4 (17.Qd4 Qc7+/–) 17...Nc6+= 18.Bf6 (18.Bc3 Qd3 19.Bd3 Rfe8+=) 18...Qf6= 19.Bf3 (19.Qb1 b6=) 19...Rad8 (19...Ne5 20.Qe4=+) 20.Qb3 (20.Qa3 Rd1 21.Rd1 Re8=) 20...Nd4 21.Qc3?? Nf3 22.Qf3=+ Qb2 23.Ra1 Rd2 24.Rfb1 Qd4=+ 25.Rd1 Rd8 26.Rd2?? Qa1 (27.Rd1 Qd1 28.Qd1 Rd1#) 0–1. rriicchhhh – mns22, Live Game Caissa's Web, 2005.

4.Be2 Bf3 5.Bf3 e6 6.0-0 (better is 6.a3!?=) 6...Bb4–/+ 7.c3 Bd6 8.Ba3 0-0 9.d3 (9.Qb3 b6–/+) 9...Nc6 10.c4 Ba3 11.Nc3?? (better is 11.Na3 Qe7 12.Nc2–/+) 11...Bb2–+ 12.Rb1 (12.Qb3 Ba1 13.Ra1 Ne5–+) 12...Bc3 13.Qc2 (13.Rb7 Na5 14.Rb1 c6–+) 13...Ba5 (13...Bb4!? 14.cd5 ed5 15.a3 Ba3 16.Rb7–+) 14.cd5 Nd5 15.Bd5 (15.Rb7 Ne5 16.Be4 Nc3–+) 15...Qd5 16.Qb3 (16.e4 Qd6 17.Rb7 Bb6–+) 16...Qb3 17.Rb3 Rab8 18.d4 Rfd8 19.Rc1 (19.f4 f6–+) 19...h6 (19...e5 20.de5 Ne5 21.Rb5–+) 20.Rd1 a6 21.g3 (21.a3 b5–+) 21...b5 (better is 21...e5 22.d5–+) 22.e4 (22.Rc1 Rb6–+) 22...Rd4 (22...Nd4 23.Rbd3 Nf3 24.Kh1–+) 23.Rc1 (23.Rd4 Nd4 24.Ra3 Nc6–+) 23...Rb6 24.f3 Rb4 (24...Rd2!? 25.a3–+) 25.Rd3 (25.Kf1–+) 25...Rd4 (25...Rb2!? 26.Ra1–+) 26.Rd4?? (26.Rb3 Rd2 27.a3–+) 26...Nd4–+ 27.Rd1 (27.Kf2 Rd6–+) 27...Nf3 28.Kg2 Ne5 (29.Kh3 c5–+) 0–1. Pieleck,Andreas – Staats,Carsten, RSX9E – A00 – Sokolsky–1, 2002.

4.h3 Bd7 5.d4 =.

4.h3 Bf5 5.a3 =.

4.h3 Bh5 5.c4 e6 6.Bb2 c6 7.c5 Nbd7 8.Be2 b6 9.d4 bc5 10.bc5 Rb8 11.Bc3 Ne4 12.Nfd2 Nc3 13.Nc3 Be2 14.Qe2 g6 15.0-0 Bg7 16.Nb3 0-0 17.f4 Qc7 18.Rab1 Rb4 19.a3 Rb7 20.Qd3 Rfb8 21.Na2 a5 22.Nd2 Rb1 ½–½. hurnavich (2365) – klauno (2375), gameknot.com, 2012.

4.h3 Bh5 5.Be2 e6 6.a3 c5 7.bc5 Bc5 8.Bb2 0-0 9.c4 Nc6 (9...dc4 10.Bc4 Nc6 11.Be2+=) 10.cd5= Nd5 11.d4 (11.Nc3 Rc8=) 11...Be7 12.0-0 Rc8 13.Nbd2 Qc7 14.Rc1 Qb8 15.Nb3 Rfd8 16.Nfd2 Be2 17.Qe2 e5 18.Nf3 Bf6 (18...e4 19.Nfd2 f5 20.g4+=) 19.de5+= Ne5 (19...Be5!? 20.Rfd1 Bb2 21.Qb2 b6+=) 20.Be5+/– Be5 21.Rc8 Rc8 22.Qb5 Rd8 23.Ne5 Qe5 24.Rd1 Rd6? 25.Qb7+– g6 26.Qa7 Nc7 27.Rd6 Qd6 28.Nd4 Nd5 29.a4 Nb4 30.a5 f5 31.Qb6 Qb6 32.ab6 Na6 33.Kf1 Nb8 34.Ke2 Kf7 35.Kd3 Ke7?? 36.Kc4+– Kd6 37.Kb5 h6 38.h4 Kd7 39.h5! (39.h5 gh5 40.Nf5+–) 1–0. Lalic,S (2255) – Roy,Ali (1855), 4NCL, 2012.

4.h3 Bh5 5.g4 Bg6 6.g5 Ne4 7.d3 Nd6 8.Bb2 e6 9.c4 c6 10.c5 Nf5 11.Nbd2 Na6 12.a3 Nc7 13.e4 Ne7 14.Bg2 de4 15.de4+= Bh5 16.Nc4 Ng6 17.Nd6 Bd6 18.cd6 Nb5 19.Bg7 Rg8+= 20.d7 Qd7 21.Qd7 Kd7 22.Bf6 Rgc8 23.a4 Nd6 24.0-0-0 Kc7 25.Rd4 Bf3 26.Bf3 e5 27.Rd6 Kd6+= 28.Bg4 c5 29.Rd1+– Kc6 30.b5 Kb6 31.Bc8 Rc8 32.Bd8 Rd8 33.Rd8 Ka5 34.Rd7 Ka4 35.Rf7 Kb5 36.Rb7 Ka6 37.Rh7 Nf4 38.Rf7 Nh3 39.g6 (39…Ka5 40.g7+–) 1–0. themonkey (2120) – keyrock (1835), GameColony.com, 2002.

5.a3 a5 =+.

5.a3 Nbd7 6.Bb2 a6 7.h3= Bf3 (7...Bh5 8.cd5 ed5 9.Be2=) 8.Qf3 Be7 9.Nc3 (9.cd5 ed5 10.Nc3 Ne5=) 9...dc4 (9...Ne5!? 10.Qf4 Bd6=+) 10.Bc4 (10.Qb7 a5+=) 10...c5 (10...Ne5 11.Qb7 Nc4 12.Qc6 Nd7 13.Qc4+=) 11.bc5 (11.Qb7 0-0+-) 11...Nc5 (11...Ne5 12.Qf4 Ng6 13.Qd4+=) 12.d4+= b5 (12...Ncd7 13.0-0+= (worse 13.Qb7 Rb8 14.Qa6 Rb2-/+)) 13.Ba2?? (better 13.dc5 bc4 14.Rd1+=) 13…Nd3-+ (13...Nd3 14.Ke2 Nb2 15.Qc6 Kf8-+) 0-1. OnlyPolishOpening (1910) - Lachu97 (1790), lichess.org, 2020.

5.a3 Nbd7 6.Bb2 Be7 7.cd5 ed5 8.Be2 0-0 9.h3 Bh5 10.Nc3 Bf3 11.Bf3 Ne5 12.Be2 a5 13.Qb3 d4 14.Na4 ab4 15.ab4 Nc6 16.b5 de3 (16...Na5 17.Qd3 de3 18.de3 Qd3 19.Bd3=) 17.de3 (17.bc6 Qd2 18.Kf1=) 17...Bb4= 18.Nc3 (18.Kf1 Ne4 19.Qc2 Nd2 20.Kg1 Na5+=) 18...Qd5 (better is 18...Ne4! 19.Qc2 Nc3 20.bc6 Ne4 21.Kf1 Qd2 22.Qd2 Nd2 (< 22...Bd2 23.cb7 Ra1 24.Ba1+/–) 23.Kg1 Ra1 24.Ba1 Ra8=+) 19.Qd5+= Ra1 20.Qd1 Rd1 21.Kd1 Bc3 22.Bc3 Ne4 23.bc6 (23.Kc2 Nd8 24.Ra1+=) 23...Nf2 (23...Nc3 24.Kc2 Ne4 25.cb7 Nd6+–) 24.Ke1+/– Nh1 25.cb7 Ng3 26.Bf3 Nf5 27.Be5?? (better is 27.Ba5 c5 28.Bb6+–) 27...Nd6=+ (27...Ne3? 28.Bc7 Nc2 29.Kd2+–) 28.Bd6 cd6 29.Kd2 g5 (29...Rb8!?=) 30.Kc3 Kg7 (30...Rb8!?+=) 31.Kc4+/– Rb8 (better is 31...f5!? 32.Kd5 h6+/–) 32.Kb5+– Kf6 33.Kb6 Ke5 34.Kc7 Rf8 35.b8Q Rb8 36.Kb8 d5 37.Kc7 f5 38.Kc6 d4 39.ed4 Kd4 40.Kd6 h5 (40...Ke3 41.Ke5 g4 42.hg4 fg4 43.Bg4 Kf2+–) 41.Bh5 Ke4 42.Bf3 (42...Kf4 43.Ke6+–) 1–0. Anastasian – Luther, Aegina, 1993.

5.a3 Be7 6.h3 Bh5 7.Bb2 (7.d4 0-0=) 7...0-0+= 8.d4. Cirulis,Ilmars (1840) – Rossi,Franco (1800), FICGS, 2015.

5.Qa4 Nbd7 6.Nc3 c6 7.cd5 ed5=+.

5.Qa4 Nbd7 6.Ne5 Bf5 (6...b5 7.Qb5 Rb8 8.Nc6 Rb5 9.Nd8=) 7.Nc3 c6 8.Nd7 Qd7 9.b5 c5 10.cd5 ed5 11.Ba3 d4 12.Ne2 Rd8 13.ed4 (13.Qa7 de3 14.d4 ef2 15.Kf2 Ne4 16.Kg1 Bg4 (16...cd4?! 17.Bf8 Kf8 18.Nf4–+) 17.Bc5 Qf5–+) 13...cd4 14.Ng3 (14.Bb2 d3 15.Ng3 Bc5=+) 14...Ba3–/+ 15.Qa3? (15.Nf5 Qf5 16.b6 Nd7 17.Qa3 A) 17...Nb6 18.Bd3 Qf6 19.Bb5 (< 19.Qa7 Qc6 20.Qa5 Nc4 21.Bc4 Qc4=+) 19...Nd7 20.0-0+/–; B) 17...ab6=+) 15...d3?? (15...Qe6 16.Be2 d3 17.Qa7–+) 16.Nf5? (better is 16.Rc1=+) 16...Qf5–+ 17.0-0-0 Qc8 18.Qc3 Ne4 19.Qc8 Rc8 20.Kb2 Nf2 21.Re1 Kd7 22.Rg1 Rc2 23.Kb3 Rd2 24.g3 Rc8 25.Re3 Kd6 26.Rg2 Rc1 27.Bd3 Rd3 28.Rd3 Nd3 29.Rd2 Rb1 30.Kc4 Rb4 31.Kd3 Rb5 (32.Kc4 Kc6–+) 0–1. Szollosi,jr – Fogarasi, 1991.

5.Qb3 Nc6 6.Bb2 =+.

5.Qb3 Nbd7 6.d4 c6 (6...Bf3 7.gf3 dc4 8.Bc4=+) 7.Nc3 (7.Nbd2 Bd6=) 7...Be7 8.Bd2 (8.Be2 dc4 9.Qc4 0-0=) 8...0-0=+ 9.cd5 ed5 10.Bd3 Bd6 11.b5 Qe7 12.h3 Bh5 (12...Bf3!? 13.gf3 a6 14.bc6 bc6=+) 13.Nh4= Bg6 14.Nf5 (14.Ng6 fg6 15.e4 a6 16.bc6 bc6+=) 14...Bf5 15.Bf5 Nb6 16.0-0 Nc4 17.Rfd1 Bc7 (17...a6 18.bc6 bc6 19.Bc1=) 18.Bd3 Qd6 19.g3 Qe6 20.Kg2 Nd6 (20...Rab8!?=) 21.bc6 bc6 22.Qc2 Rac8 (22...Nde4 23.Rac1+=) 23.Na4 Nde4 24.Bb4 Ng5?? (better is 24...Rfe8+/–) 25.Bf5+– (25.Bf8?? Qh3 26.Kg1 Nf3) 25...Qe8 26.Bf8 Qf8 27.Qc6 Nfe4 28.h4 Ne6 29.Be6 fe6 30.Qe6 Kh8 31.f4 Rd8 32.Qc6 Qe7 33.Re1 Ba5 34.Re2 Nd2 35.Nc5 Bb4 36.Qe6 Qc7 37.Rc1 Nc4 38.Na6 Qa5 39.Nb4 Qb4 40.Kh3 a5 41.e4 Nb6 42.ed5 (42…h6 43.Qg6+–) 1–0. Mashinskaya,I – Matras,A, Warszawa, 2001.

5.b5 Nbd7 6.cd5 ed5 7.h3 Bh5 8.Be2 Be7 9.Ba3 0-0 10.Be7 Qe7 11.0-0 Ne5 12.Ne5 Qe5 13.d4 Be2 14.Qe2 1–0. hahaha (2000) – wreck_tangle (1885), gameknot.com, 2014.

5.cd5 ed5 6.a3 (6.Bb2 Be7=+ (6...Bb4? 7.Qa4 Nc6 8.Ne5+–)) 6...Nbd7 (6...Bd6 7.Nc3=+) 7.Bb2 (7.h3 Bf3 8.Qf3 a5 9.ba5 Ra5=+) 7...Bd6=+ 8.Be2 (8.Nc3 0-0=+) 8...0-0 (8...a5 9.Nc3=+) 9.0-0 a5 (9...c6 10.Nc3=) 10.b5 (10.Nc3 ab4 11.ab4 Ra1 12.Ba1 Bb4=+) 10...Re8 (10...Nc5 11.Nc3=+) 11.d3 (11.h3 Bf3 12.Bf3 Ne5=) 11...c6 (11...c5 12.bc6 bc6 13.Nbd2=+) 12.Nc3 c5 13.Rc1 Nb6 14.Na4 Na4 15.Qa4 Bd7 16.Nd2 (16.Rc2 Qe7=+) 16...Bf5 (16...Re6 17.Rb1=+) 17.Rfd1 (17.Rfe1 h6=+) 17...Nd7 (17...b6 18.Nf1=+) 18.Nf1 (18.e4 d4=) 18...Nb6 (18...d4 19.Bf3 Ne5 20.Be4 Be4 21.de4+=) 19.Qc2 a4 (19...Nc4 20.Ba1 Bg6 21.Qc3+=) 20.Ng3 Bg6 21.Bf3 (21.e4 d4=+) 21...Qd7 22.Ba1 f6 (22...Qb5? 23.Rb1 Qa6 24.Qb2+–) 23.Ne2? (better 23.Qa2!? Kh8 24.Qd2=+) 23...c4–+ (23...Qb5?! 24.Rb1 Qc6 25.g3–/+) 24.Qa2 (24.Nf4 Bf4 25.ef4 Rac8–+ (25...Qb5 26.Qb1 Qb3 27.Bd4 Bd3 28.Qb3 ab3 29.Bb6–/+)) 24...cd3 (24...Bd3?! 25.Bd4 Qb5 26.Bb6 Qb6 27.Bd5 Kh8 28.Bc4 Be2 29.Be2=; worse 24...Bd3 25.Bd4 Bc7 26.Bb6 Bb6 27.Nc3+=) 25.Nc3 Bf7 (better 25...Qf5!? 26.Bd5 Nd5 27.Qd5 Qd5 28.Nd5 Rec8–+) 26.Rd3–/+ Rac8 (26...d4 27.Nd5 de3 28.Nb6 Bh2 29.Kh2 Qd3 30.Bd5 Bd5 31.Nd5–/+) 27.Rd4 Be5 28.Rd2 (28.Rdd1 d4 29.Qb1 Bb3–/+) 28...Rc5 (28...Qe7 29.Qb1 Qa3 30.Ra2–+) 29.Ne2 (29.Rdd1 Qc7 30.Ne2 Bh2 31.Kh1 Be5–/+) 29...Rc1 30.Nc1 Qb5 (30...Bd6 31.Rd1–/+) 31.Be5–/+ fe5 32.Qb2 Qc6 33.Be2 Nc4 34.Bc4 Qc4 35.Rc2 Qe4 36.Rc7 (36.Ne2 d4! 37.Ng3 Qd3–/+) 36...d4–+ 37.Qe2 Bd5 38.f3 Qe3 39.Qe3 de3 40.Rc5 (better 40.Rc3–+) 40...Rd8 41.Kf1 Bc6 (41...b5 42.Rc3 Bc4 43.Ke1–+) 42.Ke1 (42.Ke2 Rd2 43.Ke3 Rg2–+) 42...Rd2 43.Re5 Rg2 44.Re3 Rh2 45.Ne2 (45.Nd3 Rc2 46.Nb4 Rc4–+) 45…Kf7 0–1. Liptak,Tibor – Toth,Gyula, HUN–ch corr Hungary, 1996. (=1.Nf3 d5 2.b4 Nf6 3.e3 Bg4 4.c4 e6)

5.cd5 Nd5 6.Nc3 Nc6 7.b5 Nc3 8.dc3 Qd1 9.Kd1=+.

5.a3 c5 6.bc5 Bc5 7.d3 Nc6 8.Nbd2 0-0 9.c4 Qe7 10.0-0 Rfd8 11.cd5 Nd5 12.Ne4 Bb6 13.a4 Rac8 14.Nd4? (14.Bb2 Ncb4+=) 14...Be2 (14...Bd4 15.ed4 Be2 16.Qe2 Nd4 17.Qh5–+) 15.Qe2 (15.Ne2!? Qh4 16.Ba3–/+) 15...Nd4 16.ed4 Bd4 17.Ba3 Qd7 18.Rab1 f5 19.Ng5 Nc3 20.Qh5? (better is 20.Qe6 Qe6 21.Ne6 Nb1 22.Rb1–+) 20...g6 21.Qh6 (21.Qh4 Nb1 22.Rb1–+) 21...Nb1 22.Rb1 Bf6 23.Bb2 Bb2 24.Rb2 Rc1# 0–1. alfy – mirbor, kurnik, 2012.

5.a3 Bd6 6.Bb2 0-0 7.0-0 Nbd7 8.d4 a5 9.b5 Rc8 10.Nbd2 c5 11.dc5 Nc5 12.c4 dc4 13.Nc4 (worse is 13.Bc4 Qe7+=) 13...Bc7 14.Bd4 Qe7 15.Nfe5 Be2 16.Qe2 Nb3 17.Rab1 Nd4 18.ed4 Nd5 19.Qb2 (better is 19.Rfc1!?+=) 19...f6–/+ 20.Nf3 Bh2! 21.Kh2 (21.Nh2 Rc4 Discovered attack; 21.Kh2 Rc4 Discovered attack (21...Qc7 Decoy)) 21...Rc4 22.Rfe1 Qc7 23.Kg1 Re8 24.b6 Qc6 25.Qb5 Rc8 26.Qa5 Ra4 27.Qd2 Ra3 28.Rbc1 Rc3 29.Rc3 Nc3 (29...Qc3?! 30.Re6 Qa1 31.Kh2=) 30.Qe3 Qb6 31.Qe6 Qe6 32.Re6 Rb8 33.Rb6 Kf7 34.Kf1 Ke7 35.Nd2 Kd7 36.Nc4 Kc7 37.Re6 Nd5 38.Ne3 Kd7 39.Re4 Ne3 40.fe3 b5 41.Rh4 b4 42.Ke2 b3 43.Rh1 b2 44.Rb1 Ke6?? (better is 44...Rb3–+) 45.Kd3+= f5 46.Kc3 Kd5 47.Rb2 Rb2 48.Kb2 f4! 49.Kc3 (49.ef4 Ke4 Double attack (49...Kd4 Deflection; 49...Ke4 Decoy)) 49...fe3 50.Kd3 e2! 51.Ke2 Kd4 52.Kf3 Kd3 53.Kf4 Ke2 54.g4 Kf2 55.g5 g6 56.Kg4 Ke3 57.Kg3 Ke4 58.Kg4 Ke5 59.Kg3 Kf5 60.Kh4 Kf4 61.Kh3 Kg5 62.Kg3 h6 63.Kf3 Kh4 64.Kg2 Kg4 65.Kh2 Kf3 66.Kh3 g5 67.Kh2 g4 68.Kh1 Kg3 (68...Kg3 69.Kg1 h5–+; 68...g3 69.Kg1 g2 70.Kh2 Kf2 71.Kh3 g1Q 72.Kh4 Qg3 73.Kh5 Qg5) 0–1. Scheunemann,Tim (1635) – Dittmann,Moritz, Hessen–ch U16, 2005. (=1.Nf3 Nf6 2.b4 d5 3.e3 Bg4 4.Be2 e6)

5.a3 Bd6 6.Nc3 c6 7.0-0 0-0 8.d3 Nbd7 9.Nd4 Be2 10.Nce2 Qe7 11.Rb1 Rac8 12.f4 Rfd8 13.Qe1 g6 14.Qh4 e5 15.fe5 Qe5 16.b5 c5 17.Nf3 Qh5 18.Qh5 Nh5 19.g4 Nhf6 20.g5 Nh5 21.Nc3 Nb6 22.a4 d4 23.Ne4 Na4 24.Ra1 Nb6 25.Ra7+– Rc7 26.ed4 cd4 27.Nd4 Bc5 28.Nc5 Rc5 29.Rb7 Rd4 30.Rb6 Rc2 31.Rb8 Kg7 32.Rb7 Rg4? 33.Kh1 Rgg2 34.Rbf7 Kg8 35.Rf8 (35...Kg7 36.R1f7#) 1–0. Trkn – guest5162, ICC, 2005.

5.a3 Nbd7 6.c4 c6 7.Nc3 a5 8.b5=+ dc4 9.bc6 bc6 10.Bc4 Ne5 11.Be2 Nd3 12.Kf1 Be7 13.Nd4 Be2 14.Ke2 Nc1 15.Qc1 Rc8 16.Qc2 0-0 17.Rhd1 Nd5 18.Nd5 cd5–/+ 19.Nc6 Bf6 20.Rac1 Qd7 21.d4 Kh8 22.Qc5 Rfe8 23.h3 Be7=+ 24.Qc3 Bd6 25.Rd2 Rc7 26.Rdc2 Ra8 27.a4 g6 28.Qd3 Rac8 29.Qb5 Ba3 30.Nb4?? Qb5–+ 31.ab5 Rc4 32.Rc4 dc4 33.Na2? Bc1 34.Nc1 Rb8 35.Kd2 Rb5 36.Kc3 Rb4 37.e4 Kg8 38.f4 Kf8 39.Ne2 Ke7 40.g4 f5 41.gf5 gf5 42.e5 Kd7 43.d5 ed5 44.Nd4 Rb8 45.e6 Kd6 46.e7 Kd7 47.Nf5 a4 (48.e8Q Ke8–+) 0–1. Ivanets,Vladimir (2185) – Maugg,Ludwig (1975), 15sen.WMH, 2005.

5.a3 Nbd7 6.c4 c6 7.d3 a5 8.b5 cb5 9.cb5 (9.cd5 Nd5 10.Bb2 Qc7 11.h3+=) 9...Qc7 (9...Bd6 10.Bb2 0-0 11.0-0+=) 10.Bb2 Bf3 (10...Be7 11.Nc3=) 11.Bf3 Bd6 12.g3 0-0 13.Nc3 a4 14.Na4 Qa5 15.Nc3 Rfc8 16.Qd2 Nc5 17.Bd1 (17.Qc2=) 17...Nfd7 (better is 17...Nd3 18.Qd3 Be5–/+) 18.d4+= Nb6 19.dc5 Nc4 20.Qe2? (better is 20.cd6 Nd2 21.Kd2+=) 20...Be5–+ 21.Rc1 Nb2 22.Qb2 Rc5 23.0-0 Bc3 24.Qe2 Qa3 25.Rb1 Bf6 26.Rb3 Qc1 27.Qd3 Qc4 28.Qc4 dc4 29.Rb1 c3 30.Bc2 Kf8 31.Rfc1 Ra2 32.Kg2 Rb2 33.Be4 Rcb5 34.Rb2 Rb2 35.Rc2 Rb4 36.Kf3 b5 37.Bd3 Ke7 38.Kg2 Kd6 39.f4 Kc5 40.g4 h6 41.g5 hg5 42.fg5 Be5 43.Kf3 0–1. Szymanski,Leszek (1840) – Sliwerski,Radoslaw (2170), Szachowe Lato Poznan, 2011.

5.a3 Be7 6.Bb2 0-0 7.d3 Nbd7 8.Nbd2 c6 9.h3 Bh5 10.Ra2 Rc8 11.Qa1 Qc7 12.g4 Bg6 13.g5 Ne8 14.h4 Bh5 15.Ne5 Be2 16.Ke2 f6 17.Nd7 Qd7 18.Qg1 Qd6 19.gf6 Nf6 20.h5 h6 21.Nf3 Rf7?? (better is 21...c5+=) 22.Ne5+/– Rff8 23.Qg6 Ne8 (better is 23...Qc7 24.Rg1 Bd8+–) 24.Nf7?? (better is 24.Ng4 Bg5 25.f4+–) 24...Rf7–+ 25.Rg1 Qh2 26.Rf1 Qh4 27.Qe6 Qh5 28.Ke1 Qf5 29.Qf5 Rf5 30.Rg1 Bh4 31.Rg2 Rc7 32.c4 Re7 33.Kf1 dc4 34.dc4 Re3 35.Bd4 Re4 36.Rd2 Bg5 37.Rd1 Nd6 38.Ba7 Nc4 39.Kg1 Rd5 40.Rd5 cd5 41.Rg3 Re1 42.Kg2 Nd2 43.Rd3 Ra1 44.Bb8 Ra2 45.Rd5 Nc4 46.Rd7 Ra3 47.Rb7 Rb3 48.b5 Na5 49.Rb6 Bf6 50.Bc7 Kf7 51.Rb8 Nc4 52.b6 Bd4 53.Rb7 Kg6 54.Ra7 Bb6 55.Bb6 Rb6 56.Ra4 Ne5 57.Ra3 Rb4 58.Ra6 Kf5 59.Ra7 g6 60.Ra8 Rb3 61.Rf8 Ke6 62.Re8 Kf6 63.Rf8 Nf7 64.Ra8 h5 65.Ra6 Kf5 66.Ra5 Ne5 67.Ra8 Rb7 68.Ra5 Rb4 69.Ra8 Rg4 70.Kf1 Rf4 71.Rf8 Kg5 72.Re8 Ng4 73.Re2 h4 74.Kg2 Kf5 75.Ra2 g5 76.Ra5 Ne5 77.Ra8 g4 78.Rf8 Ke4 79.Ra8 h3 80.Kf1 Nd3 81.Ra4 Kf3 82.Ra8 g3 83.Rh8 Nf2 84.Kg1 h2 0–1. Pozanco Romasanta,Marc – Abal Cores,Lucas, ESP–ch U10 Linares, 2007. (=1.Nf3 d5 2.e3 Nf6 3.b4 Bg4 4.Be2 e6)

5.a3 Be7 6.d4 0-0 7.Nbd2 a5 8.b5 c5 9.a4 Nbd7 10.0-0 Rc8 11.c4 Nb6 12.Nb3 Nc4–/+ 13.dc5 Ne4 14.Qe1 Bf3 15.gf3 Nc5 16.Bc4 dc4 17.Nc5 Bc5 18.Bd2 Qg5 19.Kh1 Qf6 20.f4 b6 21.Rg1 g6 22.Bc3 Qf5 23.Rg5 Qe4 24.Kg1 Rfd8 25.h4 Rd3 26.Rg3 Rcd8 27.h5 Bb4 28.hg6 Bc3 29.gh7 Kh8 (30.Qc1 Ba1 31.Qa1 c3–+) 0–1. Pal,P – Bombek,P, Slovakia, 2000.

5.a3 Bf3 6.Bf3 c5 =.

5.c4 dc4–/+ 6.Bc4 Nbd7 7.Qb3 Bd6 8.Bb2 Qe7 9.a3=+ 0-0 10.Nc3 c6 11.h3 Bh5 12.g4 Bg6=+ 13.Nh4 Nb6 14.Ng6= hg6 15.Be2 e5 16.d3 ½–½. Kliman,Daniel – Carvalho,Guillermo (2180), ch–URU Montevideo URU, 2003.

4.c4 dc4 5.Bc4 Bf5 6.d4 +=.

4.c4 Bg7 5.d4 0-0 6.Be2 c6 7.0-0 Qc7 8.h3 Nbd7 9.Nc3 Nb6 10.c5+= Nbd7 11.Nh2 Ne4 12.Ne4+= de4 13.f3 Nf6 14.f4 Nd5 15.Bd2 f5 16.Bc4 e6 17.Bd5 ed5=+ 18.a4 Be6 19.a5 a6 20.Kh1 Kf7 21.Rg1 Rh8 22.Nf1 Rag8 23.Ng3 Ke7 24.Ra2 Kd7 25.Be1 Qd8 26.Nf1 Bf6 27.Nh2 h6–/+ 28.g3 Kc8 29.Rag2 Qe8 30.Qe2 Rg7 31.g4 Rhg8 32.gf5 gf5 33.Rg7 Rg7 34.Rg7 Bg7 35.Qg2 Qf7 36.Qe2 Bf6 37.Nf1 Bd7 (37...Kb8 38.Ng3–/+) ½–½. Van Wensen – Rongen, Boxmeer, 1992.

4.d4 Bg4 =.

4.d4 Bg7 5.c4 0-0 6.Nbd2 a5 7.b5 c5 8.Be2 cd4 9.ed4 dc4 10.Nc4 Nd5 11.Bd2 Qc7 12.a4 b6 13.Rc1 Qb7 14.Qb3 Bf5 15.Nce5 Nd7 16.Bc4 Be6 17.Nc6+/– N7f6 18.Bg5 Qd7+= 19.0-0 Nc7 20.Nfe5+/– Qd6 21.f4 Bc4? 22.Nc4+– Qd7 23.N4e5 Qd6+/– 24.f5 Ncd5 25.fg6 fg6? 26.Ne7! Qe7 27.Bf6 Bf6 28.Qd5 Kh8 29.Qe4 Be5 30.Qe5 Qe5 31.Rf8 Rf8 32.de5 Re8 33.Re1 g5 34.Kf2 h5 35.Kg3 Kg7 36.h4 Kg6 37.hg5 Kg5 38.e6 Kf6 39.e7 Kf5 40.Kf3 Kf6 41.Kf4 Kg6 42.Re6 Kf7 43.Ke5 Re7 44.Re7 Ke7 45.g3 Kd7 46.Kd5 (46...Kc7 47.Ke6+–) 1–0. Lawson,JH – Kilpatrick,Robert, corr SCCA m19, 1977.

4.d4 Bg7 5.c4 c6 6.Nbd2 0-0 7.a4 Nbd7 8.Bb2 Qc7 9.Rc1 dc4 10.Bc4 Nb6 11.Qb3 Nc4 12.Qc4 (worse is 12.Rc4 Be6–/+) 12...Be6 13.Qc2 Qb6 14.Ba3 Rac8 15.0-0 Rc7 16.Nc4 Bc4 17.Qc4 Rfc8 18.Rfd1 e6 19.Ne5 Bf8 20.Nd3 Rd7 21.Bb2 Qd8 22.h3 Ne4 23.Ne5 Rdc7 24.Rc2 Qd5 25.a5 Qb5 26.Nd3 a6 27.Nc5 Nd6 28.Qb3 b6 29.ab6 Qb6 30.Ra1 Ra8 31.Bc3 Nb7 32.Qa4 Nc5 33.bc5 Qb7 34.Rb2 Qc8 35.Rb6 e5 36.Ra6 Ra6 37.Qa6 Be7 38.Qc8 Rc8 39.Kf1 f5 40.Ra7 ed4 41.ed4 (worse is 41.Re7 dc3 42.Ke2 Rd8+=; 41.Bd4?! Kf7+–) 41...Kf7 42.Ke2 Ke6 43.Kd3 h6 44.Kc4 h5 45.Ra6 Kd7 46.Bb4 Rb8 47.Ra7 (47.Ra7 Kd8 48.Ba5 Ke8 49.d5+–) 1–0. Aragon Hermida – Frieyro Rodriguez Medel, ESP–Cup2 corr, 1987. (=1.Nf3 d5 2.b4 Nf6 3.e3 g6)

4.d4 Bg7 5.c4 Bf5 6.Nc3 0-0 7.Qb3 c6 8.b5 Ne4 9.bc6 Nc6 10.Ba3?? Na5 11.Qb4–/+ Nc3 12.Qc3 Nc4 13.Bc4 Rc8 14.Qb4 Rc4–+ (15.Qd2 Be4–+; 14...dc4?! 15.Qb7 Rc7 16.Qb5–/+) 0–1. Perea Montero – Nunez Cobos, corr Spain, 1988.

4.h3 Bg7 5.Bb2 (5.d4 0-0=) 5...0-0 (5...Nbd7 6.Be2=) 6.b5 (6.Be2 a5 7.b5 Bf5=) 6...Nbd7 (6...a6 7.a4+=) 7.d4 c6 (7...a6 8.ba6 ba6 9.c4+=) 8.a4 (8.c4 cb5 9.cb5 Nb6=) 8...a5 (8...Qc7 9.Bd3=) 9.Nc3 (9.Bd3 cb5 10.ab5 Ne4=) 9...Ne4 (9...c5 10.Be2=) 10.bc6 (10.Ne4 de4 11.Nd2 Nf6=) 10...bc6 11.Ne4 de4 12.Nd2 Ba6 (12...Nf6 13.Nb3=) 13.Ba6+= Ra6 14.Ne4 Rb6 (14...c5 15.Rb1+=) 15.Ba3 (15.Bc3 Rb8+/–) 15...Qa8 (15...Re8 16.0-0+=) 16.Bc5 (16.Qf3 Re8+/–) 16...Nc5 (16...Rb7 17.Qd3 (worse is 17.Be7 Re8=) 17...Qd8 18.0-0+/–) 17.Nc5 (worse is 17.dc5 Rb4 18.Nd2 Ba1 19.Qa1 Qa6–+) 17...Rd8 18.0-0 (18.Qf3 Rb2 19.Rc1 e5+/–) 18...e5 19.c3 ed4 (19...Bf8 20.Nd3 ed4 21.cd4+/–) 20.ed4 (20.cd4 Bf8 21.Rc1 Rd5+–) 20...Qb8 (20...Bf8 21.Qf3+/–) 21.Rb1 Rb1 22.Qb1+– Qb1 23.Rb1 Bf8 24.Nd3 Bh6 25.Rb2 Kg7 26.Ne5 c5 27.Nf3 cd4+/– 28.cd4 Rd5 29.Rb5 Rb5+/– 30.ab5 Bf4 31.Ne5 a4 32.b6?? a3–+ 33.b7 a2 34.g3 a1Q 35.Kg2 Qa7 36.gf4 Qb7 37.Kg3 Qe4 38.Nf3 f6 39.h4 h6 40.Kg4 Qe6 41.Kg3 h5 42.Nh2 Qb3 43.Kg2 Qd5 44.Nf3 Qd7 45.Nh2 Qg4 46.Kf1 Qf4 47.Kg2 Qd4 48.Nf3 Qg4 49.Kh1 Qf3 50.Kh2 Qf2 51.Kh1 Qe2 52.Kg1 f5 53.Kh1 f4 (53...f4 54.Kg1 f3 55.Kh1 Qg2#) 0–1. campocebe – malathi, internet, 2010.

4.a3 Bd6 5.d4 0-0 6.Bg2 a5 7.b5 c6 8.bc6 Nc6 9.0-0 b5 10.Nbd2 b4 11.ab4 Bb4 12.Ba3 Ba3 13.Ra3 Ba6 14.Re1 Ne4 15.e3 Qd6 16.Qa1 Nd2 17.Nd2 Rfb8 18.Rc1 Qb4 19.Nb3 Be2 20.Nc5 Bc4 21.c3 Qb2 22.Bf1 Bf1 23.Qb2 Rb2 24.Kf1 Rab8 25.c4 Rb1 26.Rac3 Ne7 27.Nd7 R8b7 28.Rb1 Rb1 29.Ke2 dc4 30.Rc4 Rb2 ½–½. Lamailloux,Michel – Manne,Xavier, corr AJEC/2406, 1994.

4.c3 Be7 5.Bg2 0-0 6.0-0 c5 (6...a5 7.b5=+) 7.a3 (7.bc5 Bc5 8.d4 Bd6=) 7...Nc6 8.d3 Bd7 9.Bf4 Rc8 10.Nbd2 a6 11.Nb3 b6 12.Be3 (12.bc5 bc5 13.c4 Nh5=) 12...c4 13.dc4 dc4 14.Nbd4 b5 15.Qd2 Nd5 16.Bg5 (better is 16.Rfd1!?=) 16...Nd4 (better is 16...Bg5 17.Ng5 Nc3–/+) 17.Be7?? (better is 17.cd4 f6 18.Be3–/+) 17...Nf3–+ (17...Ne7?! 18.Qd4 Bc6 19.Rfd1=) 18.Bf3 Qe7 19.Rfd1 Bc6 20.Qc2 Rfd8 21.Be4 Nf6 22.Rd8 Qd8 23.Bc6 Rc6 24.a4 Rd6 25.Qc1 Rd2 26.Qe1?? Ne4 27.ab5 ab5 28.Rc1?? h6 29.f3 Nc3! 30.Kf1 Rd1 31.Rd1 Qd1 32.Qd1 Nd1 33.Ke1 Ne3 34.h3 Nc2 35.Kd2 Nb4 36.Kc3 Nc6 0–1. Skean Du – marnzell, ChessWorld.net, 2006.

4.d4 Bb4–/+ 5.c3 Bd6 6.a3 0-0 7.Nbd2 c5–+ 8.a4 Nc6 9.Ba3 cd4 10.cd4–/+ Ba3 11.Ra3 Qd6 12.Rc3 Bd7–+ 13.h3 –+. soraya – onoudidnt, net–chess.com, 2008.

4.d4 e6 5.a3 Nbd7 (5...a5 6.b5=+) 6.Bg2 Bd6 (6...a5 7.b5=+) 7.Nbd2 c6 8.0-0 (8.c4 a5=+) 8...h5 (8...a5!? 9.ba5 Qa5=+) 9.c4= Ng4 (9...0-0 10.h3=) 10.cd5 (10.h3 Ngf6+=) 10...cd5 11.h3 Nf2 (better 11...Ngf6!?=) 12.Kf2 Qc7 13.Bb2 (13.Ra2+–) 13...g5 (13...Bg3!? 14.Kg1 Bc2+–) 14.Ne5! Rc8 (14...Be5 15.Nf3 Double attack (15.Nf3 Decoy); 14...Ne5 15.Nf3 Double attack (15.Nf3 Decoy)) 15.Rc1 (15.e4 Be5 16.de5 (16.ef5?! Bg3 17.Ke2 Qb6+–) 16...de4 17.Rc1 (worse 17.Ne4 Qc2 18.Kg1 Be4 19.Be4 Qe4=+) 17...Qb6 18.Ke2 Qb5 19.Ke1+–) 15...Bc2= 16.Qe1 f6 17.Ne4 (17.e4 fe5 18.ed5 ed5 19.Bd5 Kd8+–) 17...fe5+= 18.Nd6 Qd6 19.Qd2 0-0? (better 19...Qc7+=) 20.Kg1+– Rf1 21.Rf1 Bg6 22.Qg5 Kg7 23.de5 Qb6 24.Kh1 Qd8 25.Qd8 (25.Qe3 Rc2 26.Bd4 b6+–) 25...Rd8+– 26.Rc1 Nb6 27.Rc7 Rd7 28.Rd7 Nd7 29.Bd4 b6 30.Kg1 ½–½. Low,Winston – Forsman,Anders, IECC, 2003. (=1.Nf3 Nf6 2.b4 d5 3.g3 Bf5)

4.Bg2 e6 5.a3 Be7 6.d3 0-0 7.0-0 c6 8.Nbd2 a5 9.b5 cb5 10.Nd4 Qd7 11.N2f3 Rc8 12.Bd2 Nc6 Black prepares b4 13.Nf5 ef5 14.Qb1 b4 15.ab4 ab4 16.Ra8 Ra8 17.e3 Ra3 18.Nd4 (18.Bc1 Ra5=) 18...Nd4 19.ed4 Qa4 20.Re1 h6 21.Bf4 (21.Re7? Ra1 22.Qa1 Qa1 23.Bf1 b3 24.cb3 Qb2–+) 21...Kh7 (21...Ra2 22.h3–/+ (22.Re7? Ra1 23.Qa1 Qa1 24.Bf1 Qd4–+)) 22.Bh3= (22.Re7? Ra1 23.Qa1 Qa1 24.Bf1 Qb2–+) 22...g6 23.Bg2 (23.Re7? Ra1 24.Qa1 Qa1 25.Kg2 Kg8–+ (25...Qd4? 26.Be5 Qc5 27.Bf6+–)) 23...g5 24.Be5 (24.Bc7 Qd7 25.Bb8 Ng8–/+) 24...Kg6 (24...Rc3 25.Bf6 Bf6 26.Bd5 Bd4 27.Bb3=+) 25.h3 (25.f4 Rc3 26.fg5 hg5=+) 25...Rc3 Attacks the backward pawn on c2 26.Bf6 Bf6 27.Bd5 Bd4 (27...Rc2?? 28.Bb3 Qc6 29.Bc2 Bd4 30.Qd1+– (30.Qb4?! Bc3 31.Qe7 Be1=)) 28.Bb3 Qc6 29.Qd1 Rc5 30.h4 (30.Qe2 Re5 31.Qd1 Re1 32.Qe1 Qf3–+) 30...Qd6 31.Qf3 g4 32.Qg2 Qc7 33.Re2 Kg7 34.Kh2 Bf6 35.f4 gf3 36.Qf3 Bh4 37.Qf4 Qf4 38.gf4 Bf6 39.Re8 Rc7 40.Ra8 h5 41.Ra5 Kg6 42.Rb5 Bc3 43.Kg3 Be1 44.Kf3 h4 45.Rb6 f6 46.Bc4 (46.Re6 Bc3–/+) 46...Re7 (46...Bd2 47.Re6–/+) 47.Re6 (47.Bd5 h3–/+) 47...Re6 48.Be6 h3 49.d4 (49.Ke2!? Bg3 50.Ke3–/+) 49...h2–+ 50.Kg2 Bg3! 51.Bd5 (51.Kg3 h1Q Combination) 51...Bf4 52.Bb7 Bd6 53.Bd5 Kg5. Jozefini,Lubor (1865) – Bukharin,Alexey (1990), FICGS, 2016.

3.a3 Bf3 4.ef3 e5 5.Bb2 Nd7 6.d3 (better 6.Qe2!?+=) 6...Ngf6=+ 7.Nd2 c5 8.c4 (better 8.c3!?=+) 8...cb4-/+ 9.ab4 Bb4 10.Be2 0-0 11.0-0 Re8 12.cd5 Nd5 13.Nc4 (better 13.Ne4!? N7f6 14.Rc1-/+) 13...Qg5-+ 14.Qa4?? (14.Na5-+) 14...N7b6 (better 14...Nf4 15.g3 Ne2 16.Kg2-+) 15.Qb3?? (better 15.Nb6 Nf4 16.g3 Ne2 17.Kg2 Nf4 18.Kg1 ab6 19.Qb4-/+) 15...Nf4-+ 16.g3 Ne2 17.Kh1 Nc4 18.Qc4 Qd2 19.Ra2 Rac8 20.Qb3 (20.Ba3 Rc4 21.Rd2 Bd2 22.dc4-+) 20...Rc2 21.Kg2 a5 (better 21...Rec8 22.Ba3 Ra2 23.Bb4-+) 22.Qd5 (22.Bc3 Rc3 23.Rd2 Rb3 24.Re2 Rd3 25.Rc1-+) 22...Rb2 23.Rb2 Qb2 24.Qb7 Qd4 25.Qb5 Rd8 0-1. Artem979 (2015) - vladruss (2145), Rated Classical game, lichess.org, 2016. (=1.Nf3 A00: Irregular Openings 1...d5 2.b4 Bg4)

3.c3 Bf3 4.gf3 Nf6 5.d4 g6 6.Bf4 Nh5 7.Be5 f6 8.Bg3 Bg7 9.Qa4 c6 10.e3 0-0 11.Nd2 Nd7 12.Qb3 b5 13.Bb5 (13.a4 a6 14.e4=) 13...Qb6?? (better is 13...cb5 14.Qd5 Kh8 15.Qb5 f5+=) 14.Be2+/– Ng3 15.fg3 e5 16.0-0 Kh8 17.Rab1 Rae8 18.Rfe1 Bh6 19.Nf1 f5 20.a4 f4 21.a5 Qd8 22.de5 fg3 23.hg3 Ne5 24.f4 Nf7 25.Qd1 (25.c4 Bg7+/–) 25...Nd6 (25...Bg7 26.Rc1+=) 26.Bd3 Qf6 27.Qc2 Re7 28.Re2 Rfe8 29.Rh2 Kg7 30.Rh3 Re3? (better is 30...Qe6 31.Qh2 Nf7+/–) 31.Ne3+– Re3 32.Rf1 (32.Kg2 Nf7+–) 32...Qe6 33.f5 gf5 34.Bf5 Qe5 35.Rh6?? Qg3–+ 36.Qg2 Kh6 37.Qg3 Rg3 38.Kh2 Nf5 39.Rf5–/+ Rc3 40.b5 Kg6–+ 41.Re5 Kf6 42.Rh5 Ke6 43.bc6 Rc6 44.Rh7? a6–+ 45.Rh6 Kd7 46.Rh7 Kd6 47.Kg2 Kc5 48.Kf3 Re6 49.Rc7 Kd4 50.Rb7? Re3 51.Kf2 Ra3 0–1. Wesener,Lorenz – Kupfer,Michael (2215), Lauenburg op, 2009.

3.Nc3 e6 4.h3 (4.Ne5 Nf6 5.Ng4 Ng4=) 4...Bf3 5.ef3 (5.gf3 Bb4 6.Nb5 Nf6–/+) 5...Bb4=+ 6.a3 (6.Bd3 Nc6=+) 6...Ba5 7.g3 (7.Bd3 Nc6=+) 7...Nd7 (7...Nc6 8.Bd3–/+) 8.Bg2 (8.Rb1 Rb8–/+) 8...Ne7 9.0-0 0-0 10.Kh1 (10.Rb1 Nf5–/+) 10...Bc3 (10...d4 11.Na4–/+) 11.dc3–/+ Nb6 (11...Nf5 12.Re1–/+) 12.Re1 (12.Qd3 Qd7–/+) 12...Qe8 (12...Qd7 13.Qd3–/+) 13.Bb2 (13.Qd3 Nc4–/+) 13...Qc6 14.Kg1 Nf5 (14...Nc4 15.Bc1–/+) 15.f4 (15.Qd3 Nc4 16.Bc1 Rfe8–/+) 15...Rfe8 (15...Na4 16.Rb1–+) 16.Bf1 (16.Qd3 Nc4 17.Rab1 b5–+) 16...a6 (16...Na4 17.Rb1–+) 17.Bd3 (17.Qf3 Nd6–+) 17...Nc4 (17...Nd6 18.Bc1–+) 18.Bc4 (18.Rb1 Nfd6–+ (worse 18...Nb2 19.Rb2 Nd6 20.Rb3–/+)) 18...Qc4 (18...dc4 19.Qg4–+) 19.Qd3 Qc6 (19...Qa4 20.Rab1–+) 20.Rab1 (20.Bc1 f6–/+) 20...Rad8–+ 21.Qf3 (21.Bc1 Nd6–+) 21...Nd6 22.Ba1? (better 22.Re2–+) 22...Nc4 23.Rbd1 (23.Qd3 Na3 24.Rb3 Nc4–+) 23...b5 (23...Na3 24.Bb2 Nc4 25.Bc1–+) 24.Re2 (24.Qg4 Qd6–+) 24...Qd6 25.Qg4 (25.Kg2 a5–+) 25...a5 26.Rb1 (26.Rde1 a4–+) 26...c6 (26...Qa3 27.Kg2–+) 27.Bb2 (27.Rbe1 a4–+) 27...Nb2 (27...Na3?! 28.c4 g6 29.Ba3 Qa3 30.cb5 cb5 31.Rb5–+) 28.Rb2 Qa3 29.Rb1 Qc3 30.Rbe1 (30.Rb3 Qc4 31.Ra3 a4–+) 30...a4 (better 30...Qc4–+) 31.Re6 (31.f5–+) 31...Re6 32.Re6 fe6 (32...fe6 33.Qe6 Kf8 34.Qf5 Ke7 35.Qg5 Qf6–+) 0–1. MorphiusDragon (2135) – michaelbuss (2860), ChessWorld.net, 2017.

3.c4 e6 4.Bb2 Nd7 (4...Bb4?? 5.Bg7 dc4 6.Bh8+–; 4...dc4?! 5.Ne5 Bf5 6.Nc4+=) 5.c5 Bf3 (5...Ngf6 6.Ne5+=) 6.ef3= Ne7 7.f4 (7.a3 c6+=) 7...b6 8.d4 a5 9.a3 g6 (9...Ng6 10.c6 Nf6 11.b5+=) 10.b5= Bg7 11.c6 Nf6 12.Nd2 Qd6 13.g3 h5 14.Qf3 h4 15.g4 Ne4 16.Rd1 h3 (16...f5!?+=) 17.Ne4 de4 18.Qe4 f5 (18...0-0-0 19.Qf3+=) 19.Qf3+/– fg4 20.Qg4 Qd5 21.Rg1 0-0-0 22.Be2 (22.Qe2!?+=) 22...Nf5= The pressure on the backward pawn d4 grows 23.Qg6 Bd4 24.Kf1 Qa2 25.Bc1 Kb8 26.Qg4 Bf6 27.Be3? (27.Bd3 Qb3 28.Qe2 Nd4–/+) 27...Rd1 (27...Ne3 28.fe3 Rd2 29.Rd2 Qd2 30.Rg3 Qc1 31.Kf2–/+) 28.Bd1 Rd8 (28...Ne3?! 29.fe3 e5 30.f5+=) 29.Qe2 Ne3 30.fe3 Rd2 (30...Rd2 31.Rg8 Ka7–+; 30...Qa3?! 31.Kf2–/+) 0–1. Jozefini,Lubor (2015) – Petersons,Indulis (2320), CT20/pr63, 2013. (=1.Nf3 d5 2.b4 Bg4)

3.c4 Nf6 4.Qa4 Bd7 5.b5 dc4 6.e3 Bg4 7.Qc4 Nbd7 8.Bb2 a6 9.ba6 Ra6 10.Qc2 Ra5 11.Bc3 Ra8 12.Bf6 Bf3 13.Be7 Qe7 14.gf3 Qf6 15.Nc3 Qf3 16.Rg1 c6 17.Rb1 Ra7 18.Be2 Qf6 19.Rg4 1–0. AGove – michaelbuss, ChessWorld.net, 2007.

3.d3 Nc6 4.a3 Nf6 5.Nbd2 e6 6.Bb2 Be7 7.g3 0-0 8.Bg2 Re8 9.0-0 Bd6 10.c4 dc4 11.dc4 Be7 12.Ne5 Ne5 13.Be5 Qc8 14.Nf3 Rd8 15.Qc2 Bf5 16.Qb2 Rd7 17.Rad1 Qd8 (17...Be4 18.Qc3=) 18.Rd2 Ne8 19.Rfd1 Rd2 20.Rd2 Qc8 21.Nd4 Bg6 22.e3 (better is 22.c5+=) 22...f6–/+ 23.Nc6? (better is 23.Ne6 fe5 24.Qe5–/+) 23...bc6–+ 24.Bc3 Nd6 25.Qb3 Ne4 26.Rd4 Nc3 27.Qc3 e5 28.Rd2 Qe6 29.b5 (29.c5 a5!–+) 29...e4 30.Bf1 c5 31.Bg2 f5 32.Rd5 Rf8 (32...a6 33.a4–+) 33.Qa5 Qb6 34.Qb6 ab6 35.Rd7 (35.h4 Rd8 36.Rd8 Bd8–+) 35...Bd6 36.f3 f4! 37.ef4 (37.ef4 e3 Passed pawn; 37.gf4 Re8 Combination) 37...Bf5 38.Rd6 cd6 39.fe4 Be6 40.Bf1 Ra8 41.e5 (41.f5 Bf7–+) 41...de5 42.fe5 Ra3 43.Kf2 Rc3 0–1. Daligault,Mickael – Quintela,Francis, Angers op 1st, 2006. (=1.Nf3 d5 2.b4 Bg4)

3.d3 e6 4.c3 Nf6 5.Nbd2 a5 6.Qa4 Nbd7 7.ba5 c6 8.Qb3 Qa5 9.h3 Bf3=+ 10.Nf3 Nc5 11.Qc2 Bd6 12.g3 0-0 13.Bg2 Qa4–/+ 14.Qa4 Ra4 15.Nd4 g6 16.0-0 e5 17.Nc2 Rfa8 18.Bg5 Kg7 19.a3 Ne6 20.Bf6 Kf6 21.Rfb1 b5 22.Rb3 Ke7. Cirulis,Ilmars (1775) – Pech,Jaroslav, FICGS, 2008.

3.d4 Nc6 4.c3 Nf6 5.Nbd2 (5.Qd3 Qd6=) 5...e6=+ 6.e3 Bd6 7.Be2 0-0 8.0-0 Ne4 9.Ne4 de4 10.Nd2 Be2 11.Qe2 f5 12.Nc4 Be7 (12...Qh4 13.Nd6 cd6 14.Ba3=) 13.a4 Bf6 (13...Bd6 14.a5=) 14.b5+= Ne7 15.Ba3 Rf7 16.Rad1 (16.Be7 Qe7 17.a5 Rd8+=) 16...Nd5= 17.Qc2 f4 (better is 17...a6!?=) 18.ef4+/– (18.Qe4?! Nc3 19.Qb7 c5=+) 18...Nf4 19.Ne5?? (better is 19.Qe4 Qd5 20.Nd2 Qe4 21.Ne4+/–) 19...Be5=+ 20.de5 Qg5 21.Qe4 Nh3 22.Kh1 Nf2 23.Rf2 Rf2 24.Qb7 Raf8?? (better is 24...Rd8 25.Rd8 Qd8–/+) 25.Bf8+– Rf8 26.Qc7 h5 27.Qd6 Qg6 28.Kg1 Qf5 29.Qd4 g5 30.a5 g4 31.Qd3 Qf2 32.Kh1 Qf7 33.b6 ab6 34.ab6 h4 35.Kg1 h3?? 36.gh3 Qg7 37.hg4 Qe5 38.Qg6 Kh8 39.Qh5 Qh5 40.gh5 Rb8 41.Rd6 e5 42.c4 Kg7 43.c5 Kf7 44.h6 e4 45.Kf2 Re8 46.c6 e3 47.Ke2 Ke7 48.Rd7 Ke6 49.b7 Kf5 50.Rd3 Kf4 51.c7 Kg5 52.c8Q Rc8 53.bc8Q Kh6 54.Qc5 Kg6 55.Rd6 Kf7 56.Qc7 Ke8 57.Ra6 Kf8 58.Ra8 1–0. marnzell – willow27, ChessWorld.net, 2006.

3.d4 f6 4.h3 Bh5 5.c3 Nd7 6.Qd3 e6 7.e4 Bg6 8.Nbd2 a5 9.b5 Nb6 10.Nh4 Bh5 11.Be2 Bf7 12.Nhf3 Bg6 13.0-0 Bd6 14.Nh4 Bf7 15.ed5 Nd5 16.Ne4 Bf4 17.g3 Bc1 18.Rac1 f5 19.Nc5 b6 20.Nb3 Nf4 21.Qe3 Ne2 22.Qe2 Ne7 23.Nd2 0-0 24.Nhf3 Nd5 25.c4 Nf6 26.Rfe1 Nd7 27.a4 Rc8 28.c5 Re8 29.Ne5 Ne5 30.Qe5 Re7 31.Qe3 Rd7 32.Nf3 bc5 33.Rc5 Rd5 34.Qc3 Rc5 35.Qc5 Qd5 36.Qd5 ed5 37.Rc1 (37…Bh5 38.Ne5+–) 1–0. jasa – Breisa, ChessWorld.net, 2002.

3.e3 Bf5 4.Nd4 Be4 5.Nc3 c6 6.Ne4 de4 7.Bc4 b5 8.Bb3 f5? (better is 8...e6=) 9.Nf5+– g6 10.Ng3 Bg7 11.d4 (better is 11.Rb1 Nf6 12.Bb2+–) 11...c5?? (better is 11...ed3 12.Rb1 Bc3 13.Bd2 dc2 14.Qc2 Bd2 15.Qd2 Qd2 16.Kd2 Nf6+=) 12.bc5+– Nc6 13.Ne4 e5 (13...Qd7+–) 14.Nd6 Kd7 (14...Ke7 15.Nf7 Qc8 16.de5+–) 15.Qg4 (better is 15.Nf7 Qa5 16.Bd2+–) 15...Ke7 (15...Kc7 16.d5 Nh6 17.Qe2+–) 16.Nf7 (16.Qe6 Kf8 17.Qf7) 16...h5 (16...Qd7 17.Qh4 Bf6+–) 17.Qg6 (better is 17.Qe6 Kf8 18.Nh8 Qf6 19.Ng6 Qg6 20.Qg6 Nd8 21.Qf5 Bf6 22.de5 Ne7 23.Qf6 Ke8+–) 17...Qa5 18.Bd2 Qc7 19.Qg7 (19.Qg7 Rh7 20.Qh7+–) 1–0. raymac – rgp, ChessWorld.net, 2012. (=1.Nf3 d5 2.b4 Bg4)

3.h3 Bh5 4.e3 Nd7 5.Be2 (5.Bb2 e6=) 5...Ngf6 (5...e5 6.a3=+) 6.Nd4 (6.g4 Bg6=) 6...Be2=+ 7.Qe2 (7.Ne2 e6=+) 7...e5–/+ 8.Nb3 (8.Nf5 g6 (8...Bb4?! 9.Ng7 Kf8 10.Nf5=) 9.Ng3 Bb4–/+) 8...Bb4 9.a3 (9.Qb5 a5–/+) 9...Bd6 10.0-0 0-0 11.Bb2 c5 12.d3 b5 13.N3d2 Nb6 14.d4 Qe8 15.de5 Be5 16.c3 Bc7 17.Re1 Na4 18.Nb3 Rb8 19.N1d2? c4 20.Nd4 Nb2 21.Rec1 Nd3 22.Rcb1 Ba5 23.Nc2 Bc3 24.Ra2 Ne4 25.Ne4 Qe4 26.f3 Qg6 27.f4 Qe4 28.Nb4 Nb4 29.Rb4 a5 30.Rbb2 Bb2 31.Rb2 c3 32.Rc2 Rfc8 33.h4 b4 34.ab4 ab4 35.Kf2 b3 36.Rc1 b2 37.Rd1 c2 (38.Rd5 c1Q 39.Rd8 Rd8 40.g3 b1Q 41.Qd1 Qce3 42.Kf1 Qd1) 0–1. dodobonito – pierre (2100), internet, 2006.

4.c4 dc4=+ 5.Qc2 Ngf6 6.Bb2 e6 7.Qc4 Bd6 8.e3 0-0 9.Be2 e5 10.Nc3 a6 11.h3 b5 12.Qb3 Be6 13.Qc2 c5 14.Ng5 cb4 15.Ne6 fe6 16.ab4 Bb4 17.Bf3 Rb8 18.Ra6 Nc5 19.Ra7 Nd3 20.Ke2 Bc5 21.Rg7 Kg7 22.Qd3 Qd3 23.Kd3 Be7 24.Ra1 b4 25.Ne4 Ne4 26.Be4 Bf6 27.Ra6 Rbd8 28.Kc2 Rfe8 29.g4 h6 30.f4 Kf7 31.fe5 Be7 32.Ra7 Rh8 33.d4 Kf8 34.Ra6 h5 35.g5 Bg5+/– 36.Re6 Rh6 37.Rh6 Bh6 38.Kd3 Bg7 39.Kc4+– Bh6 40.Kb4 Rb8 41.Kc3 Be3 42.Ba3 Kg7 43.Bd6 Rd8 44.Bc5 44...Rc8 45.Kc4 h4 46.Bf5 Ra8 47.Kd5 Bf2 48.Bg4 Rd8 49.Ke4 Kg6 50.Be7?? Re8?? 51.Ba3 (51.Bf6 Rb8 52.Bd7 Rb3+–) ½–½. Ivanets,Vladimir (2290) – Uhlmann,Wolfgang (2410), EU–ch Seniors, 2005.

4.d4 e6 5.h3 Bf5 6.Bf4= Bd6 7.Bd6 cd6 8.e3 Rc8 9.Bd3 Ne7 10.0-0 0-0 11.Qe2 Bd3=+ 12.cd3 Qc7 13.Nbd2 Qc2 14.e4 Rc3=+ 15.Qe3 Qd3 16.Qd3 Rd3 17.ed5 ed5 18.Rac1 Nc6 19.Nb1 Rb3 20.Rc3 Rb2 21.Rcc1 Rc8 22.Nc3 Nf6 23.Rfe1 Rb3 24.Kf1 Kf8 25.Nb1 a6 26.h4 Ne4–/+ 27.Rc2 Rd3 28.Rcc1 Kg8 29.h5=+ h6 30.Ke2 Rb3 31.Kf1 Nf6 32.Nh4 Nh5 33.Nf5 Rd8 34.Rc3 Rb2 35.Rf3 Ra2 36.g4 Nf6 37.Nh6 Kf8 38.Rf6 gf6 39.Nf5 Rc2 40.Ne3 Rb2–+ 41.Nf5 Rb3 42.Kg2 Rd3 43.Rh1 Ke8–+ 44.Rh3 Rh3 45.Kh3 Ne7 46.Ne7 Ke7 47.Nc3 Ke6 48.Ne2 Kd7 49.Nf4 Kc6 50.Kg2 (50.Kg2 f5 51.Kf3–+; 50.Kg3 Re8 51.Kf3 Re1–+) 0–1. wesolyPolak (1740) – xeon5 (1640), GameColony.com, 2002.

6.Be2 a5 7.b5 Bd6 8.0-0 c6 9.Nc3 Qc7 10.h3 Bf3 11.Bf3 c5 12.Be2 0-0 13.f4 d4 14.Nb1 e5 15.fe5 Be5 16.ed4 Bd4 17.Bd4 cd4 18.c3 (18.Bd3 Ne5=+) 18...Qc5 19.Kh1 Ne4 20.Qe1 Qe5 21.Rf3 Rae8 22.cd4 Qd4 23.Nc3 Ndc5 (23...Qd2 24.Qd2 Nd2 25.Rd3=+) 24.Rd1 Nc3 25.Rc3 Ne4 26.Re3 Re6 (26...f5 27.Bf3=) 27.Bf3 (27.Bd3 Rfe8=) 27...f5 28.Rc1 Rd8 Increases the pressure on d2 (28...a4 29.Be2 Ree8 30.Bd3=) 29.Be4 Re4 30.Rc7 b6 31.Re4 fe4 32.Re7 Qd2 33.Qe4 Qd1 34.Kh2 Qd6 35.g3 Qd2 (35...Qa3?? taking the pawn will bring Black grief 36.Qe6 Kh8 37.Re8 Qf8 38.Rf8 Rf8 39.Qb6+–) 36.Qg2 Qg2 37.Kg2 Rd2 38.Kf3 Ra2 39.Re3 g6 (39...a4 40.Kf4=) 40.Rc3 (40.Ke4 a4+=) 40...h5 (40...a4 41.Ke4=) 41.Ke4 Re2 (41...a4 42.g4+=) 42.Kd5+/– The white king gets dangerous 42...h4 (42...Kg7!?+/–) 43.gh4 Rf2 44.Kc6 Rf6 45.Kb7 Kf8 (45...Kf7 46.Rc6 Rf3 47.Kb6 Rh3 48.Ka6 (48.Ka5?! Ra3 49.Kb4 Rh3+–) 48...Rh4 49.b6+– (49.Ka5?! is clearly worse 49...Rh5+–)) 46.Rc6 Rf3 47.Kb6 (47.Rb6?! Rh3 48.Rg6 Rh4+–; 47.Rg6?! Kf7 48.Rb6 Ra3+–) 47...Ra3 48.Ka7 (48.Rg6 Not 48...Kf7 49.Rg4 Ke6+–) 48...Ke7 49.b6 Kd7 50.Rg6 Rb3 51.b7 Kc7 52.Rg7 Kc6 (52...Kd6 doesn't change anything anymore 53.Rg5 a4 54.h5+–) 53.b8R (53...Rb8 54.Kb8+–; better is 53.h5 and White wins 53...a4 54.h6 a3+–) 1–0. lucya (2140) – England3–0 (1700), GameColony.com, 2002.

8.Be2 Bf3 9.gf3 a5 A) 10.cd5 ed5 (10...cd5 11.Rg1 g6 12.ba5 Qa5 13.Nc3 Be7 14.Nb5 0-0 15.Bc3 Qb6) 11.Rg1 ab4 12.ab4 Ra1 13.Ba1 g6 14.b5 Bd6 15.Qc2 c5; B) 10.Rg1 dc4 (10...ab4 11.ab4 Ra1 12.Ba1 dc4 13.Bc4 b5 14.Bb3 Bb4 15.Rg7 Kf8; 10...g6 11.cd5 cd5 12.ba5 Qa5 13.Nc3 Bc5 14.Nb5 0-0 15.Bc3 Qb6) 11.Bc4 Nb6 12.Be2 ab4 13.ab4 Ra1 14.Ba1 Qd6 15.Nc3 Qh2; C) 10.b5 Bd6 11.Nc3 0-0 12.Rg1 g6 13.Rb1 Rb8 14.bc6 bc6 15.d4 dc4.

8.Be2 Bf3 9.gf3 dc4 10.Bc4 Nb6 (10...b5 11.Be2 a5 12.Qc2 Qb6 13.ba5 Ra5 14.Nc3 Be7 15.Rg1 0-0; 10...Bd6 11.Nc3 0-0 12.Rg1 Qe7 13.Qb3 g6 14.Rc1 a5 15.b5 Rfc8; 10...g6 11.Nc3 Bd6 12.Ne4 Ne4 13.Bh8 Nf2 14.Kf2 Qh4 15.Ke2 Qc4; 10...a5 11.b5 Bd6 12.Rg1 g6 13.Nc3 0-0 14.f4 Qe7 15.h4 Nb6; 10...Qc7 11.Nc3 a5 12.b5 Be7 13.bc6 Qc6 14.Bb5 Qb6 15.Rg1 0-0) 11.Be2=+ Bd6 12.Rg1 0-0 13.Nc3 g6 14.f4 Nbd5 15.Qb3 Re8.

8.Be2 Bf3 9.gf3 g6 10.Qb3 Bg7 (10...Bd6 11.cd5 ed5 12.Bd4 0-0 13.Nc3 Bc7 14.Kf1 Bb6 15.Bb6 ab6; 10...dc4 11.Qc4 Be7 12.f4 Nb6 13.Qb3 Qd5 14.Qd5 Nbd5 15.Nc3 0-0; 10...a5 11.Rg1 ab4 12.ab4 Ra1 13.Ba1 Qb6 14.cd5 cd5 15.Bc3 Be7; 10...Be7 11.cd5 ed5 12.Bd4 0-0 13.Nc3 c5 14.bc5 Nc5 15.Qb5 Rc8) 11.Nc3 0-0 12.cd5 Nd5 13.h4 Nc3 14.Bc3 Bc3 15.Qc3 Nf6.

8.Be2 Bf3 9.gf3 g6 10.Nc3 Bd6 (10...Bg7 11.cd5 ed5 12.Qb3 0-0 13.d4 Qe7 14.f4 Rfe8 15.0-0 Qe6; 10...Be7 11.cd5 ed5 12.Qb3 0-0 13.d4 Nb6 14.f4 Qd7 15.h4 Rfe8) 11.Rg1 0-0 12.f4 d4 13.Na4 de3 14.de3 Qe7 15.Qc2 e5.

8.Be2 Bf3 9.gf3 g6 10.cd5 cd5 (10...ed5 11.Qb3 a5 12.Rg1 Bd6 13.ba5 Nc5 14.Qb6 Qb6 15.ab6 Ke7) 11.Nc3 Bg7= (11...Rc8 12.Rc1 a6 13.Na4 Bd6 14.Rc8 Qc8 15.Qa1 Be7) 12.Rg1 0-0 13.Rc1 Rc8 14.Na4 Rc1 15.Qc1 Qb8.

8.Be2 Bf3 9.gf3 g6 10.f4 Bg7 (10...Bd6 11.Nc3 0-0 12.h4 dc4 13.Bc4 a5 14.b5 Rc8 15.Be2 Nc5; 10...a5 11.b5 Bd6 12.h4 dc4 13.Nc3 Rc8 14.Bc4 0-0 15.Be2 Nc5; 10...dc4 11.Bc4 Bd6 12.Nc3 0-0 13.h4 a5 14.b5 Rc8 15.Be2 Nc5; 10...Be7 11.cd5 ed5 12.h4 Qc7 13.Qb3 0-0-0 14.Nc3 Kb8 15.Rc1 Qd6) 11.Nc3 0-0 12.Qc2 Nb6 13.d3 dc4 14.dc4 Qe7 15.0-0 Rfd8.

8.Be2 Bf3 9.gf3 g6 10.Rg1 Be7 (10...dc4 11.Bc4 Bd6 12.Nc3 0-0 13.f4 Qe7 14.Qb3 Rfc8 15.Rc1 a5; 10...Bg7 11.Qc2 0-0 12.Nc3 Nb6 13.d3 d4 14.ed4 Nh5 15.c5 Nd5; 10...Bd6 11.c5 Bc7 12.f4 0-0 13.Nc3 d4 14.Na4 de3 15.de3 Qe7; 10...a5 11.cd5 cd5 12.ba5 Qa5 13.Nc3 Be7 14.Nb5 0-0 15.Bc3 Qb6) 11.Nc3 0-0 12.Qc2 Nb6 13.c5 Nc4 14.Bc4 dc4 15.Ne4 Ne4.

8.Be2 Bf3 9.gf3 g6 10.h4 Bg7 (10...dc4 11.Bc4 Bg7 12.f4 0-0 13.Nc3 Qe7 14.Be2 a5 15.b5 cb5; 10...a5 11.cd5 cd5 12.ba5 Bc5 13.Nc3 Qa5 14.h5 gh5 15.Nb5 Rg8; 10...Bd6 11.c5 Bc7 12.Nc3 0-0 13.Rg1 Qe7 14.Qc2 e5 15.Qf5 Kh8; 10...Be7 11.cd5 cd5 12.h5 gh5 13.Nc3 Rg8 14.Rc1 a6 15.f4 Rc8) 11.Nc3 (11.d4 dc4 (11...0-0 12.cd5 cd5 13.Nd2 Qb6 14.Qa4 Qd6 15.Rc1 Rfc8) 12.Bc4 Nb6= 13.Bd3 0-0 14.Nc3 a5 15.b5 Rc8; 11.Qc2 dc4 12.Bc4 0-0 13.Nc3 a5 14.f4 Nb6 15.Be2 Nbd5) 11...h5 (11...dc4 12.Bc4 Ne5 (12...0-0 13.f4 Qe7 14.Qb3 a5 15.Rg1 ab4) 13.d3=+ (13.Be2 Nd3 14.Bd3 Qd3 15.Ne4 Ne4) 13...0-0 14.Ke2 Nc4 15.dc4 Qe7) 12.Qc2 a5 (12...dc4 13.Bc4 0-0 14.Be2 a5 15.f4 ab4) 13.b5 Rc8 (13...0-0 14.bc6 bc6 15.Rg1 Rb8) 14.bc6 bc6 (14...Rc6 15.Nb5 dc4) 15.Na4 (15.Rg1 0-0) 15...c5 (15...0-0+= 0.26/11) 16.Rb1 0-0 17.Bd3 (17.cd5 ed5 18.Bb5 c4=) 17...dc4 18.Bc4 Nd5 19.Bg7 Kg7 20.f4 Ne7 (20...Qc7 21.f5+=) 21.Rb5 (21.Ba6 Rc7 22.Qc3 Kh7 23.Qa5 Nd5=) 21...Nf5 (21...Kh7 22.Nc3=) 22.Qc3 Kh7 23.Bd3 (23.d3 Nd6 24.Ra5 Ra8 25.Nc5 Qa5 (worse 25...Ra5 26.Nd7 Rh8 27.Nf6 Kh6 28.Ke2=) 26.Qa5 Ra5 27.Nd7 Rd8–/+) 23...Nd6=+ (23...Nh4 24.Ra5 Qe7 25.Ra7+–) 24.Rb1 Qc7 25.Rg1 Qc6 (25...c4 26.Bc2=) 26.Qc2 (26.Qa5? Ra8 27.Qc3 Qa4–+ (27...Ra4?! 28.Qc2–/+)) 26...Rg8 27.Nc3 (27.Be2 Kh6+=) 27...Nf6 28.Be2 (28.Bb5 Qf3=) 28...Nf5 29.f3 Nd4 30.Qd1 Nf5 31.Qc2 Nd4 32.Qd1 Nf5 ½–½. Ivanets,Vladimir (2290) – Spassov,Liuben (2395), Wch–Seniors, Lignano Sabbiadoro ITA (4), 2005.

4.Bb2 Nd7 5.e3 Ngf6 6.h3 Bh5 7.Nc3 a5 8.b5 Bd6 9.g4 Bg6 10.d3 h6 11.Bg2 c5 12.Rb1 Rc8 13.Nd2 Nb6 14.e4 d4 15.Ne2 Nfd7 16.c3 Ne5 17.Nc1 dc3 18.Bc3 0-0 19.f4 Qh4 20.Kf1 Ned7 21.e5 Bb8 22.Bb7 Nd5 23.Bd5 ed5 24.Ba5 Bc7 25.Bc7 Rc7 26.Kg2 Ra8 27.f5 Bh7 28.Qe1 Qe7 29.e6 fe6 30.Qe6 Qe6 31.fe6 Nf8 32.Re1 Re7 33.Rb3 Ne6 34.Kg3 Kf7 35.Nf3 Rb7 36.Ne2 g5 37.Ra1 Ra5 38.a4 Kf6 39.h4 gh4 40.Kh4 Rb6 41.Nc3 Rd6 42.b6 Ra8 43.Ne1 d4 44.Ne2 c4 45.dc4 d3 46.Nc3 d2 47.Ng2 Bc2 48.Rb2 d1Q 49.Rd1 Rd1 50.Rc2 Rh1 51.Kg3 Nc5 52.Rf2 Kg7 53.Ne3 Rc1 54.Ned5 Na4 55.b7 Rb8 56.Na4 Rc4 57.Nab6 Rc1 58.Ne3 Rb7 59.Nbd5 ½–½. Rushton,Darren (1700) – Reuter,Alfred (1700), TSC, 2001.

4.Bb2 Nd7 5.h3 Bh5 6.g4 Bg6=+ 7.Bg2 Ngf6 8.d3 c5 9.c3 Bd6 10.Nh4 0-0 11.Nd2 b5 12.a4 ba4 13.Qa4 cb4 14.Ng6 fg6 15.cb4 Qb6 16.0-0 Bb4–/+ 17.Nb3 Nc5 18.Nc5=+ Bc5 19.Be5 Qb7 20.d4 Bb6 21.e3 Rac8 (21...Rac8 22.f4 Qe7=+). amoruritme – Tihomir Glowatzky, ChessWorld.net, 2005.

3.Bb2 (--> 1.b4 d5 2.Bb2 Bg4 3.Nf3).

3.Bb2 a6 (--> 1.b4 d5 2.Bb2 a6 3.Nf3 Bg4).

3.Bb2 Nd7 4.e3 Ngf6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7).

3.Bb2 Nd7 4.e3 Ngf6 5.h3 Bh5 (--> 1.b4 d5 2.Bb2 Bg4 3.h3 Bh5 4.Nf3 Nf6 5.e3 Nbd7).

3.Bb2 e6 4.e3 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 e6).

4.Ne5 Bf5 5.e3 Nbd7 6.Nd7 Qd7 7.Bb5 c6 8.Be2 e5 9.b5 Bd6 10.bc6 bc6 11.d4 Rb8 12.Rb1 0-0 13.Rb8 Rb8 14.0-0 Qb7 15.f3 ed4 16.ed4 Qc7 17.f4 Qa5 18.Bd2 Bb4 19.Rf3 Bg4 20.Re3 Bc3 21.Bc3 Qa2 22.Be1 Rb1 23.Qd2 Be2 24.Re2 Qa1 25.Qe3 Ne4 26.Kf1 Rd1 27.c3 f5 28.Rc2 Qb1 29.Re2 Rc1 0–1. Anna_Goldberg (1835) – pierre (2150), internet, 2007.

4.h3 Bf3 5.ef3 e6 6.Rb1 Bd6 7.d4 0-0 (7...Qe7 8.a3+=) 8.Nb5 Be7 9.Nc3 (9.Bf4 Na6 10.a3 c6+=) 9...c6 10.Qd2 b5 11.Bd3 a5 12.a3 Nbd7 13.0-0 ab4 14.ab4 Nb6 (14...Bd6 15.Re1+=) 15.Rd1 (15.Re1 Bd6+=) 15...Bd6 16.Qe1 (16.Ne2 Nc4 17.Qc3 Ra4–/+) 16...Qe7–/+ 17.Ne2 Ra4 (17...Ra2 18.Qc3 Nc4 19.Bf4–/+) 18.c3+= Rfa8 19.Bg5 h6 20.Bh4 Nc4 21.f4 (21.Bc4 bc4 22.Ra1 Kh7+=) 21...Qd8 (21...R8a7 22.Bc4 dc4 23.Ra1=) 22.Bc4 bc4 23.Ra1 Qc7 (23...Ra2 24.Ra2 Ra2 25.Ra1 Ra1 26.Qa1=) 24.Ra4 Ra4 25.Bf6 gf6 26.Qd2 f5 27.Rb1 Qa7 28.Nc1 (28.Qe3 Ra3 29.Qg3 Kh7=) 28...Ra3 29.g3 Qa4 30.Kg2 (30.Kh2 Qb5=) 30...h5 31.h4 Kg7 32.Rb2 Ra1 33.Ra2 Ra2 34.Na2 Kf6 (34...Qb3 35.Nc1 Qb1 36.Kh2=) 35.Nc1 Qa3 (35...Kg7 36.Qe2 Qa3 37.Qe3=) 36.Ne2+= Qa1 (36...Qb3 37.Ng1+=) 37.Ng1 Kg6 (37...Qb1 38.Nf3+=) 38.Nf3+/– Qb1 39.Qe2 (39.Ne5 Be5 40.fe5 Kh7+/–) 39...Qc1+= 40.Qe1 Qb2 (40...Qe1 41.Ne1 f6 42.Nf3=) 41.Ng5 (41.Ne5 Be5 42.fe5 Qc2+=) 41...Kf6 (41...Kg7 42.Ne6 fe6 43.Qe6 Bf4 44.Qd7 Kh8 45.Qc6+=) 42.Qe3 Qc2 43.Kg1 (43.Nf3 Ke7+=) 43...Qb1 44.Kh2 Qc2 45.Qe1 Kg6 46.Kg2 Be7 (46...Kg7!?=) 47.Nf3+= Bf6 48.Qe3 (48.Ne5 Be5 49.fe5 Qd3+=) 48...Kh6 (48...Qe4 49.Kg1+=) 49.Qd2 (49.Ne5 Be5 50.fe5 Kg7+=) 49...Qe4= 50.Qd1 (50.Qe1 Kg6=) 50...Kg6+= 51.Kg1 (51.Kf1 Bg7+=) 51...Kg7 (51...Bh8 52.Ng5 Qd3 53.Qd3 cd3 54.Kf1+/–) 52.Ne1 (52.Ne5 Be5 53.fe5 f4=) 52...Kg6 53.Ng2 Bd8 54.f3 Qd3 55.Qd3 cd3 56.Kf2 Bc7 57.Ke3 f6 58.Kd3 Kf7 (58...Bd6 59.Ne3+/–) 59.Ne3 (59.c4 Bd6 60.Kc3 e5+/–) 59...Ke7 (59...Bd6 60.Ke2+/–) 60.Ke2 (60.c4 dc4 61.Kc4 Bb6+/–) 60...Bd6 61.Ng2 (61.Nc2 Bc7+/–) 61...Kd7 (61...e5 62.Ke3+/–) 62.Ne1 e5 63.Nd3 ed4 (63...e4 64.Nc5 Ke7 65.Ke3+/–) 64.cd4+– Ke6 65.Nc5 Ke7 66.Kd3 Bc7 67.Kc3 Bb6 68.Kb3 Kd6 69.Ka4 (69.Kc2 Ke7+–) 69...Ke7 70.b5 cb5? (better is 70...Kd6 71.Kb4 Ba7+/–) 71.Kb5 Bc7 72.Nb7 Ke6 (72...Kd7 73.Kc5 Ke6 74.Kc6+–) 73.Kc6 (73.Kc6 Bb8 74.Nc5 Kf7 75.Kd5+–) 1–0. Ortiz,Clodomiro (2305) – Schmid,Pablo (2030), FICGS, 2013. (=1.Nf3 d5 2.b4 Bg4)

4.Bb2 Nd7 5.Na3= Nb6 6.Rc1 Nf6 7.Ne5 Bh5 8.Nac4 e6 9.Qb3 Nbd5 10.h4 Bb4 11.a3+= Be7 12.f3 Nb6 13.g4+/– Ng4 14.fg4+– Bh4 15.Kd1 Bg6 16.Bg2 0-0 17.Ng6 (17.Ng6 fg6 18.Nb6 ab6 19.Qe6 Kh8 20.Rh4+–; 17.Qh3 Nc4 18.Rc4 Bg5+–) 1–0. AGove – willow27, ChessWorld.net, 2007.

4.Qc2 +=.

4.Ne5 Qd4 5.Ng4 Qa1 6.Nc3 –+.

4.Qa4 c6 5.b5 Nf6 6.d3 Qd6 7.Ba3 c5 8.g3 Nbd7 9.Bg2 e5 10.h3 Nb6 11.Qc2 Bd7 12.0-0 Be7 13.Re1 a6 14.ba6 Ra6 15.e3 e4 16.Nfd2 ed3 (16...de3 17.Re3 (worse 17.Ne4 Ne4 18.Be4 Na4-/+) 17...ed3 18.Qb3=) 17.Qd3+= Be6 18.ed4 Qd4 19.Qd4 cd4 20.Bb2 Bc5 (20...Nc4!? 21.Nc4 Bc4 22.Bd4 b5+=) 21.Bb7+/- Ra7 22.Bc6 Ke7 23.a4 (23.Nb3 Bb4 24.Bd4 Rc7+/-) 23...Kd6 24.Bb5 Rha8 (24...Bh3 25.Nb3 Bd7 26.Nc5 Bb5 27.ab5 (27.cb5?! Kc5 28.Rc1 Kd5+-) 27...Ra1 A) 28.Ba1?! Kc5 29.Nd2 Ra8= (29...Nc4? 30.Rc1+-); B) 28.Nb7 Kc7 29.Re7 (29.Ba1?! Kb7 30.c5 Re8 31.Re8 Ne8+-) 29...Kc8 30.Ba1 Nc4 31.Bd4+-) 25.Nf3 The isolani on d4 becomes a target 25...Bc4 26.Na3 Bd5 27.Nd4 Na4 28.Nf5 Kc7 29.Be5 Kb6 30.Rab1 (worse 30.Ng7 Ne4 31.Bc4 Kc6=) 30...Nc3 31.Bc3 Ra3 32.Be2 (32.Bf1 Kc6 33.Rec1 Bf2 34.Kh2 Ne4 35.Bb5 Kb6 36.Bc4 Kc6 37.Ne7 Kd7 38.Nd5 Bg3 39.Kg2 Nc3 40.Nc3 Bf4+-) 32...Kc6 33.Rec1 Be4 34.Bf6 Bb1 35.Bd4 R8a5 36.Rb1 g6 37.Bc5 Kc5 38.Rc1 Kb6 (38...Kd5 39.Ne3 Ke6 40.Rc7+-) 39.Nd6 Ra1 40.Rf1 Rf1 41.Bf1 (41.Kf1?! Ra1 42.Kg2 f5+-) 41...Kc6 42.Nf7 Ra7 43.Ne5 Kd5 44.Nc4 (44.f4 g5 45.Bc4 Ke4 46.Bd3 Kd5+-) 44...Kd4 45.f4 Ra2 46.Ne5 Rc2 47.h4 Rb2 48.Bg2 Ra2 49.Kh2 Ke3 50.Kh3 Rc2 51.Ng4 Kd4 52.Nf6 Rc7 53.Kg4 1-0. chandragupta (2180) - marekt (2115), gameknot.com, 2014.

4.Qa4 c6 5.b5 Nf6 6.d3 Qd6 7.g3 Bf3 8.ef3 a6 9.bc6 Qc6 10.Qd1 h5 11.Bg2 h4 12.0-0 h3 (12...e6 13.f4 Qc7 14.Nd2=) 13.Bh1+= e6 14.Nd2 Qc7 15.Rb1 Nc6 16.f4 Be7 17.Re1 g6 18.Nf3 Nd7 19.Ng5 a5 20.Ne6 (better 20.a3!?+=) 20...fe6=+ 21.Re6 Ra6 (21...Nc5 22.Rb7 Nb7 23.Bc6 Kf8 24.f5=) 22.Rb5 Kd8 23.f5 (23.Rg6 Rb6=) 23...gf5 24.Bf4 Qc8 25.Qe1 Bc5 26.Bf3 Bb4 27.Qe2 Bc5 28.Bd5 Ba3 29.Qf3 Ne7 (better 29...a4=) 30.Re7 (worse 30.Bb7 Re6 31.Qd1 Qc5 32.Rc5 Nc5-+) 30...Ke7 31.Bg5 Attacking the backward pawn on b7 31...Nf6 32.Kf1 (32.Qe2 Kf8 33.Qe5 Rh7 34.Bf6 Qe8+-) 32...Bb4 (32...Rf8 33.Bb7 Qe6 34.Ba6 Qa6 35.Qf5 Bd6+-) 33.a3 Kf8 34.Bb7 (34.ab4?! ab4 35.Qd1 Nd5 36.Rd5 Kg7=) 34...Qe8 35.ab4 Re6 36.Qd1 (36.Bd2 ab4 37.Rf5 Kg7 38.Rg5 Kf7+-) 36...Rh7 (36...ab4 37.Rf5 (37.Rb4 Ng4 38.f3 Nh2 39.Kf2 Nf1-+) 37...Qd8 38.Qf3+-) 37.Bf6 Rf6 38.ba5 f4 39.g4 Re7 40.Bd5 f3 41.Rb6 (41.Rb6 Rf4 42.Rh6+-) 1-0. deepthough (2125) - marekt (2205), gameknot.com, 2015.

4.Bb2 Bf3 5.gf3 e5 6.f4 ef4 7.Bg2 c6 8.0-0 (8.Qc2 Nf6=+) 8...Bb4 9.Qb3 Qb6 10.e3 fe3 11.de3 de3 12.fe3 (12.Bg7!? e2 13.Rc1 e1Q 14.Re1 Be1 15.Qb6 ab6 16.Bh8=+) 12...Bf8 13.Bd4 Qb3 14.ab3 Nf6! 15.Nc3 (15.Bf6 gf6 Combination) 15...Nbd7 16.Rf5 (16.Ba7 Bb4 17.Bd4 0-0-/+) 16...Be7 (16...a6 17.e4-/+) 17.Ra7 Ra7 18.Ba7 0-0 19.Bd4 Ra8 20.Na4 Nf8 21.Bf3 N6d7 22.Bc3 Ne6 23.Ra5 Ra5 24.Ba5 f5 25.Kf1 Ne5 26.Be2 Kf7 27.Kg2 Bg5 28.Bd2 Ng4 (28...g6 29.c5-/+) 29.Bg4 fg4 30.b4 Kf6 31.Nc3 White intends b5 31...Kf5 32.b5 Bf6 33.bc6 bc6 34.Nd1 Nc5 35.Bc3 Ne4 36.Bf6 (36.Bb4 Be5-+) 36...gf6 (36...Nf6?! 37.Nc3-/+; worse 36...Kf6 37.Nb2-+) 37.h3 (37.Nb2 Nd2-+) 37...gh3 38.Kh3 Nd2 39.c5 Ne4 40.Kh4 Nc5 41.Nc3 Ne4 42.Ne2 c5 43.Kh5 Nf2 44.Nc3 c4 45.Kh6 Ng4 46.Kh7 Ne3 47.Kg7 Ke5 48.Kg6 f5 49.Kg5 f4 50.Kh4 Kd4 51.Ne2 Ke4 52.Nc3 Kd3 53.Na2 c3 54.Nc1 Ke4 55.Kh3 c2 56.Nb3 f3 57.Kg3 Nd1 58.Nd2 Ke3 59.Nf3 c1Q 60.Nh4 Ke4 61.Kg4 (61.Kg2 Qg5 62.Kh2 Qh4 63.Kg2 Ne3 64.Kg1 Qg3 65.Kh1 Qg2) 61...Ne3 62.Kh5 Nf5 63.Nf3 Qh6 (63...Qh1 64.Nh2 Qh2 65.Kg6 Qh6 66.Kf7 Qg7 67.Ke6 Qe7) 64.Kg4 0-1. wojwys (2130) - marekt (2155), gameknot.com, 2019.

4.d3 Bf3 5.gf3 e6 6.a3 a5 7.b5 Nd7 8.Nd2 Ne7 9.f4 Nc5 10.Ne4 Nf5 11.Bg2 Nh4 12.0-0 (12.Bh3 f5 13.Nc5 Bc5=+) 12...Ng2=+ 13.Kg2 a4 14.Nc5 Bc5 15.e4 0-0 16.f5 (16.Rg1 c6=+) 16...ef5-/+ 17.ef5 Re8 18.Bf4 (18.Qf3 Ra7=+) 18...Qd7 19.Qh5 c6 (19...Be7 20.Qg4=+) 20.bc6 (20.f6 b6 21.fg7 cb5 22.cb5 Ra5=+) 20...bc6 (20...Qc6 21.Qf3-/+) 21.f6 Bd6 22.Qg5 (22.Bd6 Qd6 23.fg7 Re6=+) 22...g6 23.Rfe1 (23.Bd6 Qd6 24.c5 Qf8=+) 23...Bf8 (23...Re1 24.Re1 Ba3-/+) 24.Re8 Re8 25.Qa5 Re6 (25...c5 26.Qb5 Qg4 27.Bg3=) 26.Qa4 Rf6 27.Bg3 Bd6 28.Qd1 c5 29.a4 Bg3 30.hg3 (30.fg3 Qb7 31.Kg1 Qe7=) 30...Qb7=+ 31.Kg1 Qb2 32.Qe1 (32.f4 Rb6=+) 32...Kg7 33.a5 Rf2 34.Rb1 Qc2 35.Qf2 Qb1 36.Qf1 Qc2 (36...Qa2!? 37.Qe1 Kf8-+) 37.a6-/+ Qa2 38.Qf4 Qa6 39.Qe5 Qf6 40.Qc5 Qd8 (40...h5 41.Qd5-/+) 41.Qe5 f6 42.Qe4 Qd7 43.Kg2 Kf7 44.g4 h6 45.c5 f5 46.gf5 gf5 47.Qe5 Kg6 (47...Qc6!? 48.Kg3 Qg6 49.Kf3 Qf6=+) 48.Kg3 h5 49.Kf4 Exerts pressure on the isolated pawn 49...h4 50.c6 Qc6 51.Qf5 Kg7 52.Qg4 Qg6 53.Qg6 Kg6 54.Kg4 Kf6 55.Kh4 Ke5 56.Kg4 Kd5 57.Kf3 Kc5 58.Ke4 Kc6 59.Kd4 Kd6 60.Ke4 Ke6 61.Kd4 Kd6 62.Kc4 Kc6 63.d4 Kd6 64.d5 Kc7 65.Kc5 Kd7 66.d6 Kd8 67.Kc6 Kc8 68.d7 Kd8 69.Kd6 ½-½. dewil (2355) - marekt (2765), ChessWorld.net, 2021.

4.ef3 dc4 5.Bb2 e6=.

4.ef3 c6 5.cd5 cd5 6.Bb5 Nd7 7.0-0 e6 8.Bb2 Ngf6 (8...Bb4?? 9.Bg7 Qc7 10.Bh8+–) 9.Bf6 (9.a3 Bd6=) 9...gf6 (9...Qf6 10.Nc3=) 10.f4 (10.Qb3 Qc7=) 10...f5 (10...Bb4 11.f5 Qe7 12.Re1=+) 11.Nc3 (11.a3 Bd6=+) 11...Bb4=+ 12.Nd5 (12.Qb3 Be7=+) 12...ed5–/+ 13.Qb3 Be7 14.Qd5 a6 15.Ba4 (15.Bc4 0-0 16.Qb7 Nc5–/+) 15...b5 16.Bb3 Threatening mate: Qxf7 16...0-0 17.Qf5 Nf6 18.Rae1 Rc8 19.d4 (19.Re2 Bb4–/+) 19...Rc7 Black launches an attack 20.d5 (20.Rd1 Bb4–/+) 20...Qd7–+ 21.Qe5 Qd6 (21...Rfc8 22.Re2–+) 22.Re3 a5 23.a3 (23.Rfe1 a4 24.Bd1 Qe5 25.Rg3 Kh8 26.Re5 Bd6–+) 23...Rd8 24.Rd1 Rdc8 25.h3 (25.Rde1 Qa3 26.Bc2 Qd6 27.Bh7 Kf8–+ (27...Kh7?? 28.Rh3 Nh5 29.Qh5 Kg7 30.Qh7 Kf8 31.Qh8; 27...Nh7? 28.Rg3 Qg6 29.Rg6 fg6 30.d6 Bd6 31.Qd6+–)) 25...a4 (25...Qa3 26.d6 Qc5 27.de7 Qe5 28.Rg3 Kh8 29.Rd8 Ne8 30.fe5+–) 26.Ba2 Rc2 (26...Rc1 27.Rc1 Rc1 28.Kh2–+) 27.Qf5 (27.Qe7!? Qe7 28.Re7 Ra2 29.Re3–/+) 27...R8c3–+ 28.Bb1 Rc1 (28...Re3 29.fe3 Rc3 30.e4 Qa3 31.d6–+) 29.Kh2 (29.Rc1 Rc1 30.Kh2 Kf8–+) 29...Rd1 30.Qg5 (30.Rc3 Rd5 31.Qc8 Bf8 32.Rg3 Kh8–+) 30...Kh8 (better 30...Kf8!? 31.Rc3 Rb1 32.Rc6–+) 31.Rc3 Ng8 (31...Rd5 32.Rc8 Bd8 33.Qg3–+) 32.Qf5? (32.Qg4 Rb1 33.Rg3–/+) 32...Qg6–+ 33.Qg6 (33.Qe5 Qf6 34.Bd3 Qe5 35.fe5 b4 36.ab4 Bb4–+) 33...hg6 34.Be4 (34.Bd3 Bf6 35.Be2 Rd5–+) 34...Rd4 35.Bf3 Rf4 (better 35...Nf6–+) 36.Rc6? (36.Rd3 Bd6 37.g3–+) 36...Ba3 37.Be2 (37.Ra6 Nf6–+) 37...b4 38.d6 (38.Kg3 Rd4 39.Rc4 Rd5–+) 38...b3 (38...Rf2? 39.d7 Re2 40.d8Q+–) 39.Bc4 (39.d7 Rd4 40.Rb6–+) 39...Rc4! 40.Rc4 Theme: Deflection from d6 40...Bd6 41.g3 b2 (41...b2 42.Ra4 b1Q–+) 0–1. Ivanets,Vladimir – Ivanov,Victor L, It (open) Moscow (Russia), 1995. (=1.Nf3 d5 2.b4 Bg4 3.c4 Bf3)

4.ef3 e5 5.cd5 Qd5 =.

4.ef3 e6 5.Bb2 Nf6 6.Qb3 dc4 7.Bc4 Be7 8.Nc3 0-0 9.0-0 Nc6 10.Ne4 Ne4 11.fe4 Qd2 12.a3 Rad8 13.Rae1 Nd4 14.Bd4 Qd4 15.e5 Qb6 16.Kh1 a5 17.f4 g6 18.b5 Rd2 19.g4 Qd4 20.Re2 Re2 21.Be2 Qe4 22.Qf3 Qf3 23.Rf3 Rd8 24.Rc3 Rd7 25.Kg2 b6 26.a4 Rd2 27.Kf3 Bc5 28.Rd3 Ra2 29.Bd1 Rh2 30.Rd7 h5 31.Kg3 Rh1 32.gh5 gh5 33.f5 h4 34.Kg2 Rg1 35.Kh2 ef5 36.Bb3 Rg7 37.e6 fe6 38.Be6 Kf8 39.Rg7 Kg7 40.Bf5 Kf6 41.Bc2 Ke5 42.Kh3 Bf2 43.Kg2 Bg3 44.Bd1 Kd4 45.Kh3 Kc5 46.Kg2 ½–½. Ivanets – Skomorokhin, 1995.

4.gf3 dc4 5.Bb2 b5 6.a4 c6 7.Bg2 Nf6 8.ab5= e6 9.f4 Nd5 10.Qa4 Qb6 11.Nc3 Nc3?? 12.Bc3+– Bd6 13.bc6 Qc7 14.b5 0-0 15.Ba5 Qe7 16.Qc4 Rc8 17.c7! (17.c7 Nd7 18.Ba8+–) 1–0. AGove – golly1, ChessWorld.net, 2007.

4.gf3 dc4 5.Bb2 e6 6.Bg2 Nf6 7.Na3 Bb4 8.Nc4 0-0 9.Qb3 a5 10.a3= b5 11.ab4 bc4 12.Qc4+= Nbd7 13.ba5+/– Rb8 14.Bc3 Nd5 15.a6 N7b6 16.Qd4 Nc3 17.Qd8+– Rfd8 18.dc3 Na8 19.0-0 Rb3 20.Rfb1 Rdb8? 21.Rb3 Rb3 22.Rd1 Rb8 23.f4 Kf8 24.a7 Rc8 25.Bb7 Re8 26.Rd7 c5 27.Bg2 Nb6 28.Rb7 Na8 29.Rb8 (29.Rb8 Nc7 30.Bc6+–) 1–0. orane – opponent, internet, 2008.

4.gf3 dc4 5.Qc2 =+.

5.Bb2 dc4 6.Qc2–/+.

5.Bb2 dc4 6.Bg2–/+.

5.Bb2 Nf6 6.b5 Bd6 7.e3 (7.cd5 ed5 8.Bh3 a6=+) 7...Nbd7 (7...dc4 8.Nc3=+) 8.d4 dc4 (8...0-0 9.c5 Be7 10.Rg1=) 9.Bc4 Nd5 (9...0-0 10.Nc3=+) 10.Qb3 (10.Nc3 N7f6=) 10...N7b6 11.Nd2 (11.Bd3 0-0=+) 11...Qh4 (11...Nc4 12.Qc4 0-0 13.Ne4–/+) 12.Ke2 (12.Be2 Rd8=+ (12...Bh2? 13.Nf1+–)) 12...0-0 (12...Bb4 13.Ne4–/+) 13.Rag1 (13.Bd3 Rfd8=+) 13...Rfe8 (13...Nc4 14.Nc4 Qf6 15.Nd6 cd6 16.e4 Nf4 17.Kd1=+) 14.Rg4 (14.Bd3 Rad8=+) 14...Qh5 (14...Qh6 15.Bd3=+) 15.Rhg1 (15.Bd3 Rad8=+) 15...g6 16.Ne4 Nc4–/+ 17.Qc4 Be7 18.Ng3 Nb6 19.Nh5= Nc4 20.Bc3 a6 21.a4 ab5 22.ab5 Ra2 23.Kd3 Nb6 24.R4g2 Rea8 25.Rc1 R8a3 26.Nf4 Bb4 27.Ne2? Re2!–+ 28.Ke2 Bc3 29.Rgg1 Nd5 30.Kf1 Ra2 31.h4 h5 32.Rg5 Ba5 33.Rc5 Ne7 34.Kg1 Bb6 35.Rc1 Nf5 36.f4 Kg7 37.Kf1 f6 38.Rg1 Nh4 39.Rg3 Nf5 40.Rh3 Nd6 41.Rb1 Ne4 42.Rd1 Rf2 43.Kg1 Rb2 44.d5 Nf2 (45.Rh4 Nd1 46.de6 Ne3–+) 0–1. Bulcourf,Carlos (2260) – Rosito,Jorge (2420), Najdorf op Buenos Aires, 2002.

5.Bb2 Nf6 6.c5 Be7 =+.

5.Bb2 Nf6 6.cd5 ed5 7.e3 (7.Rg1 Qd6=+) 7...Nbd7 (7...Bd6 8.a3=+) 8.a3 (8.Rg1 a5 9.b5 Rg8=) 8...g6 (8...a5 9.ba5 Bd6 10.Qb3=+) 9.Bh3 (9.Nc3 c6=) 9...Bg7=+ 10.0-0 (10.d4 c6=) 10...0-0 (10...Nb6 11.d3=+) 11.f4 (11.d4 Re8=+) 11...Re8 (11...c6 12.d3=+) 12.Bd4 (12.f5 c6=+) 12...c6 (12...Nf8 13.f5=+) 13.Nc3 a5 14.Rb1 White plans b5 (14.d3 Nh5 15.Bg7 Ng7=+) 14...ab4 15.ab4 Nf8 (15...Ne4 16.Bg7 Kg7 17.b5=+) 16.b5 Ne6 (16...Qe7 17.bc6 bc6 18.Qc2=) 17.bc6 bc6 18.Be6 (18.Bb6 Qd6=+) 18...Re6= 19.Qf3? (better 19.d3=) 19...Ne4–+ 20.Bb6? (better 20.Rb2 Bd4 21.ed4–+) 20...Nd2 21.Qe2 Nb1 (21...Bc3?! 22.Bd8 Nb1 23.Rb1 Rd8 24.Qd3=+) 22.Bd8 (22.Rb1 Qh4 (22...Bc3?! 23.Bd8 Rd8 24.f5 gf5 25.Qf3=+) 23.Qd3 Qg4 24.Kf1 h6–+) 22...Nc3 (22...Bc3?! 23.Rb1 Rd8 24.f5 gf5 25.Kf1=+) 23.Qd3 Rd8 24.Rc1 Ne4 25.f3 (25.Kf1 Rb8–+) 25...Nf6 26.Qa6 (26.f5 gf5 27.Qf5 Rb8–+ (worse 27...Re3 28.Rc6 Re1 29.Kg2–+)) 26...Re3 (26...c5 27.Qb5 Re3 28.Kf2–+) 27.Rc6 Nh5 28.Rc8 Ree8 (28...Rf8 29.Rf8 Bf8 30.Kf2–+) 29.Rd8 Rd8 30.Qb6 Bf6 31.Kf1 d4 32.Ke1 (32.f5 d3 33.Ke1 Bc3 34.Kf1 Ra8 35.fg6 hg6–+) 32...Kg7 33.f5 d3 34.fg6 (34.Qc7 d2 35.Kd1 g5–+) 34...hg6 (better 34...Re8 35.Kd2 Re2 36.Kd3 Nf4 37.Kc4 Rc2 38.Kb5 Rb2 39.Kc6 Rb6 40.Kb6 fg6 41.Kc5–+) 35.Qe3 (35.Kd1 Nf4 36.Qc5 Rb8–+) 35...d2 36.Kd1 Rd4 37.h4 Nf4 38.Qg1 Nd5 (38...Nd5 39.Qd4 Bd4 40.Kd2 Nf4–+) 0–1. Bulcourf,Carlos (2285) – Slipak,Sergio (2520), Villa Martelli op2, 1999.

6.a3 Nc6= 7.d4 Qh4 8.b5 Nd4 9.e3 Ne6 10.Qd5 Nc5 11.Bb2 (11.Bc4 Nh6 12.Bb2 Be7=) 11...Nf6 12.Qd4 Qd4 (12...Qh5 13.Qe5 Qe5 14.Be5=) 13.Bd4 Nb3 14.Bf6 gf6 15.Ra2 Rg8 16.h4 Bd6 (16...Rd8 17.Rc2=) 17.Nc3 Be5 (17...Rd8 18.f4=) 18.Na4 Bd6 19.Bc4 Na5 20.Bd3 h6 21.Nc3 Be5 22.Rc2 0-0-0 23.Bf5 Kb8 24.Ne4 Rd5 25.a4 c6 26.Ke2 cb5 27.ab5 Rb5 28.f4 Rb2 29.Rb2 Bb2 30.Rb1 Nc4 31.Nc5 b5 32.Bd3 Rc8 33.Bc4 Rc5 34.Rb2 Rc4 35.Rb5 Kc7 36.Rh5 Rc6 37.Rh6 a5 38.Rh8 Kb7 39.Rh7 Rc7 40.h5 a4 41.h6 (41.Rg7!?+=) 41...a3= 42.Rg7 Rc1 43.Rf7 Kb6 44.h7 Rh1 45.Rf6 Ka7 46.Rd6 a2 47.h8Q Rh8 (47...Rh8 48.Rd1 Combination) 48.Rd1 Rb8 49.Ra1 Rb2 50.Kf3 Kb6 51.f5 Kc5 52.e4 Kd6 53.Kg3 Ke5 54.f4 Ke4 55.f6 Rb8 56.Ra2 Rg8 57.Kh4 Kf5 58.Ra5 Kf6 59.Rg5 Rg5 60.fg5 ½–½. antinephilehi (1925) – marekt (2060), gameknot.com, 2014.

6.Qa4 c6 7.e3 Qf6–/+ 8.Nc3 Qf3 9.Rg1 Nd7 10.b5 Qf6 11.bc6 bc6 12.Rb1 Nc5 13.Qc2= Qe6 14.Rg3 d4=+ 15.Na4 d3 16.Bd3 Nd3 17.Qd3 Rd8 18.Qc2= Nf6 19.Rb7 a5 20.Rg5+= Nd7 21.Bb2+/– c5 22.Nc3 h6 23.Nb5 Rc8 24.Nd4 Qd6 25.Rg4 Qd5 26.Ra7 Be7? 27.Nf5+– (27.Nf5 Bf6 28.Bf6 Nf6 29.Qa4 Kf8 30.Rg7+–; 27.Ra5?! Ne5 28.Qf5 Rb8+=; 27.Rg7?! Rb8 28.Nb3 c4+=) 1–0. AGove – marekt, ChessWorld.net, 2007.

6.Qa4 Nd7 7.Nc3 Ngf6 8.Rg1 g6 9.Bb2 c6 10.b5 Nb6 11.Qf4 Bg7 12.Qe3 Qe7 13.Qe7 Ke7 14.e3 Rhd8 15.Ba3 Ke8 16.bc6 bc6 17.Rb1 Kd7 18.d4+= Bf8 19.Bf8 Rf8 20.Kd2 Ne8 21.Rb3 Nd6 22.Kc2 Rfe8 23.Bd3 Rac8 24.h4 c5 25.Ra3+= cd4 26.Ra7 Rc7 27.Rc7 Kc7 28.ed4 h5 29.a4 Ra8 30.Ra1 Nbc4? 31.Nd5+– Kd8 32.Ne3 Na5 33.Bb5 Rc8 34.Kd3 Ke7 35.Rb1 Ke6 36.f4 Rc7 37.Re1 (37.Re1 Nb5 38.f5 gf5 39.ab5+–) 1–0. gtate (2640) – lupanghinirang (2545), net–chess.com, 2008.

6.Bb2 Nf6 =+ (6...Bb4?? 7.Bg7 Nf6 8.Bh8+–).

6.Nc3 Nf6 7.a3 d4 (7...Bd6 8.Qb3=) 8.Ne4 Nc6 9.Bb2 a6 10.Qc2 Be7 11.Rg1 0-0 12.e3 g6 13.0-0-0 Qd5 14.Ng5 Qd6 15.f4 Nd5 16.h4 Bg5 (16...Rae8 17.h5 a5 18.hg6 fg6 19.b5 Bg5 20.bc6+– (worse 20.Rg5 Nce7+–)) 17.Rg5 a5 18.b5 Nce7 19.Bd4 Qa3 20.Bb2 Qd6 21.h5 f6 22.Rg3 Kf7 23.hg6 hg6 24.Bc4 Ke8 25.e4 Nb4 26.Qb3 Qf4 27.Rf3 Qg5 (27...Qe4? 28.Re3 Qf5 29.Rde1+–) 28.e5 (better 28.Kb1+=) 28...c6?? (better 28...fe5 29.Bf7 Kd8+=) 29.ef6+– Ned5 30.bc6 bc6 31.Bd5 cd5 32.Qa4 (32.Qa4 Kd8 33.Qb5 Rc8 34.Kb1+–) 1–0. rickdragon (2035) – marekt (1975), gameknot.com, 2014.

6.Nc3 Nf6 7.Rg1 Nc6 8.a3 d4 9.Ne4 Ne4 10.fe4 g6 11.b5 Ne5 12.d3 c5 (12...Bg7 13.Bg5 Qd7 14.Qb3+=) 13.bc6 (13.Qa4 Bg7 14.Bg5 Qc7=) 13...Nc6 14.Qb3 Rb8 15.Qd5 (15.h3 Qb6 16.Qb6 ab6=) 15...Qc7= 16.h4 Be7 17.h5 a6 (17...Nb4 18.Qb5 Kd8 A) 19.ab4?? Qc3 20.Kd1 A1) 20...Qa1?! 21.Bh3 f5 22.Qd5 (worse 22.ef5 Rc8 23.Qa5 Qa5 24.ba5 gh5=+) 22...Ke8 23.Qb5 (23.ef5 Rc8 24.Qb5 Kf8–+) 23...Kd8 24.Qd5 (worse 24.ef5 Rc8 25.Qa5 Qa5 26.ba5 gh5=+) 24...Ke8 25.Qb5 (25.ef5 Rc8 26.e4 Rc1 27.Ke2 Rg1–+) 25...Kd8=; A2) 20...Qb3 21.Ke1 Bb4 22.Qb4 Qb4 23.Bd2 Qb2–+; B) 19.Rb1=) 18.Rb1 (18.Bh3 Rd8 19.Qb3 Qh2–/+) 18...b5 19.Rh1 0-0 20.Bd2 (20.hg6 hg6 21.Kd1 Rfd8=) 20...Rfd8 21.Qb3 b4 22.hg6 hg6 23.Rg1 (23.ab4 Bb4 24.Bb4 Rb4–+) 23...ba3 24.Rg6 Kh8 25.Rh6 Kg7 26.Rh7 Kh7 27.Qf7 Kh8 28.Qh5 Kg8 29.Qg6 Kh8 30.Qh5 Kg8 0–1. vuel (2025) – marekt (2135), gameknot.com, 2015.

4.a3 Nf6 5.Nbd2 c6 6.Ne5 Bh5 7.c4 Nbd7 8.Qb3 a5 9.cd5 ed5 10.ba5 Bd6 11.a6 Ne5 12.ab7= Rb8 13.de5 Be5 14.Rb1 0-0 15.Bb2 Re8 16.Be5 Re5 17.Qb4 Re7 18.Qb6 Qe8 19.f3 Bg6–/+ 20.Rb4 Rbb7 21.Qd4? Qa8 22.Qc3 Rbc7 23.Nb3 c5 24.Rb5 c4 25.Nd4 Ra7 26.Kf2 Re8 27.g3 Ra3 28.Qb4 Ra1 29.Qc3 Ra3?? 30.Qb4 Ra1?? 31.Qc3 Ra2 32.Bh3 Bd3 33.Re1 Be2 34.Rb2 Bd3 35.Re8 Ne8 36.Bf1 Bf1 37.Kf1 h6 38.Ra2 (38.Ra2 Qa2 39.h4–+) 0–1. Taulien,Hans_Juergen (2350) – Zenner,Peter (2180), RSX8D – priv – XMAS, 2004.

4.a3 Nf6 5.e3 Bd6 6.Bb2 0-0 7.c4 a5 8.b5 c5 9.dc5 Bc5 10.h3 Bf3 11.gf3 Qe7 12.Nd2 Nbd7 13.cd5 ed5 14.Nb3 Be3 15.fe3 Qe3 16.Be2 Rfe8 17.Nd4 Ne5 18.Kf1+= Ng6 19.Qc1 Qe5 20.Bd3 Nh5 21.Nf5 Ng3 22.Kg2 Qb8 23.Ng3 Nf4 24.Kh2 Nd3 25.Qd2 Nb2 26.Qb2 Qf4 27.Rhe1 Qf3 28.Rf1 Qe3 29.Rae1! Qb6 30.Nf5 f6 31.Qg2 Qc7 32.Qg3 Qg3 33.Kg3 Rad8 34.Re8 Re8 35.Kf2 g6 36.Nd6 Re6 37.Nb7 Rb6 38.Na5 Rb5 39.Nc6 Rc5 40.Nb4 Kf7 41.a4 Ke6 42.Ra1 Ra5 43.Nc6 Rc5 44.Nd4 Ke5 45.Nf3 Kf4 46.Nd2 Rc2 47.Ke2 Rc6 48.a5 Ra6 49.Nb3 Kg3 50.Ra3 Kg2 51.Nc5 Ra7 52.Ne6 g5 53.Kd2 h6 54.Nd4 Ra6 55.Nf5 h5 56.Ke2 h4 57.Nd4 g4 58.hg4 h3 59.Nf5 Re6 60.Ne3 Kg3 61.Kf1 d4 62.Nd1 Kg4 63.Nf2 Kf5 64.a6 Re8 65.a7 Ra8 66.Nh3 Ke6 67.Ra6 Kd5 68.Nf4 (68...Ke5 69.Ne6 Ra7 70.Ra7 Ke6 71.Ke2+–) 1–0. dominick1952 (2015) – pov (1905), internet, 2006.

4.Ne5 Bb4? 5.c3 +–.

4.Ne5 Bf5 5.a3 Bd6 6.Bb2 Nd7 7.e3 Ngf6 8.Nd2 0-0 9.Be2 a5 10.b5 c5 11.g4 Bg6 12.c4 cd4 13.ed4 dc4 14.Ng6 hg6 15.Nc4 Nb6 16.h4 Nc4 17.Bc4 Rc8 18.Rc1? Bf4–+ 19.Rc2? Rc4! 20.Rc4 Qd5 21.Rh3 Qc4 22.Qe2 Qa2 23.Qc2 Qd5 24.f3 e5 25.de5 Be5 26.Be5 Qe5 27.Kf2 Qf4 28.Kg1 Rd8 29.Kh1 Rd2 30.Qb1 Qd4 31.Rg3 0–1. ancientmage (2530) – michaelbuss (2725), ChessWorld.net, 2003.

4.Ne5 Nf6 5.Ng4 Bb4? 6.c3 Bd6 7.Bg5 +–.

4.Ne5 Nf6 5.Ng4 Ng4 =.

4.Nb3 Bb4 5.Bb2 Nd7 6.Nc3 d4 7.Nd5 Bd6 8.h3? (better is 8.c3 c6 9.Nb4–+) 8...Be6 9.e4 c6 10.Bd4 (10.Qf3–+) 10...ed4 (worse is 10...cd5 11.ed5 Bd5 12.Be3–+) 11.c4 dc3 (better is 11...Qh4!? 12.Qc2–+) 12.Nc3 c5 (12...Ngf6!? 13.Nd4–+) 13.Bb5 Ngf6 14.d4 cd4 15.Nd4 (15.Qd4 Qc7 16.Rc1 Bb3 17.ab3 Be5–+) 15...Bb4 16.Nde2 Ne4 17.Rc1 (17.Qd4 Nc3 18.Qb4 Nb5 (worse is 18...Na2 19.Qb2–+) 19.Qb5 0-0–+) 17...Rc8 (better is 17...Qf6 18.Qc2 Qf2 19.Kd1–+) 18.Qd4 Bc3 19.Nc3 Nc3 20.Rc3 (20.Qg7 Nb5 21.Qh8 Nf8–+) 20...Qa5 21.Qg7 (21.Bd7 Bd7 22.Kd2–+) 21...Qc3 22.Qc3 Rc3 23.0-0 Rg8 0–1. phi – Bossieman, ChessWorld.net, 2014. (=1.Nf3 d5 2.b4 Bg4 3.Nd4 e5–/+)

4.Nb3 Bb4–+ 5.c3 Be7 6.f3 Bf5 7.Bb2 Nf6 8.d3 0-0 9.N1d2 Nc6 10.e4 Be6 11.Be2 Nh5 12.Nf1 Nf4 13.Ne3 d4 14.g3 de3 15.gf4 Bh4 16.Kf1 Bh3 17.Kg1 Bf2# 0–1. bar (1905) – pierred (2595), net–chess.com, 2008.

4.f3 ed4 5.fg4 Bb4 6.Bb2 Nc6 7.a3 Bd6 8.e3? (better is 8.g3–+) 8...Qh4 9.g3 Bg3! 10.hg3 Qh1 11.Qe2 Nf6 12.ed4 Kd7 13.Qd3 (13.Qf2–+) 13...Rae8 14.Kd1 Ne4 15.Nc3 (15.Kc1 Nf2 16.Qf5 Kd8 17.Qf2–+) 15…Nf2 (15...Nf2 16.Kc1 Re1 17.Nd1 Rd1) 0–1. rgp – marekt, ChessWorld.net, 2012. (=1.Nf3 d5 2.b4 Bg4)

4.h3 Bf3 5.Qf3 e5 6.Bb2 Nc6 (6...e4 7.Qg3=) 7.b5 ab5 (7...e4 8.Qd1 ab5 9.Bb5=) 8.Bb5+= Nf6? (better 8...e4!? 9.Qg3 Nge7+=) 9.Be5+/- Be7 10.Bc6 (10.Qg3 Nh5 11.Qh2 Rc8+/-) 10...bc6+/- 11.0-0 Ne4 (11...0-0!?+/-) 12.Bg7+- Rg8 13.Bc3 Qd7 (13...Qd6+-) 14.d3 (better 14.Qh5!?+-) 14...Ng5+/- 15.Qh5 Nh3 16.Kh2 Ng5 17.f4 Ne6 18.Nd2 d4 (18...Nf8 19.a4+/-) 19.Bd4 Nd4 20.ed4 Qd5 (20...Qd4 21.Ne4+/- (21.Qh7?? Rh8 22.Qh3 Rh3 23.Kh3 Qc3-+)) 21.Qd5 cd5 22.a4 0-0-0 (22...Rg6 23.Rh1+-) 23.Nf3 (23.a5 Rd6+-) 23...Rde8 (23...Rd6 24.a5+-) 24.Rfe1 Bd6 25.g3 Bb4 26.Re8 Re8 27.g4 Re2 28.Kg3 Rc2 29.a5 (29.g5 Bd6+-) 29...Bd6 (29...Bc3 30.Rh1 f6 31.Rh7 Ba5 32.Rh6+-) 30.a6 Kb8 31.g5 Rc3 (31...Rc6 32.Ra5+-) 32.a7 (32.Rh1 Rd3 33.Rh7 Ra3+-) 32...Ka8 33.Rh1 Rd3 34.Rh7 Re3 (34...Ka7 35.Rf7 Kb6 36.g6+-) 35.Rf7 Re7 (35...Ka7 36.Rf5 c6+-) 36.Re7 Be7 37.f5 c5 38.f6 Bd6 (38...Bd8 39.dc5 Ka7 40.Nd4+-) 39.Kg4 c4 40.g6 Bb4 41.g7 c3 42.g8Q Ka7 43.Qd5 c2 44.Qa2 (44.Qa2 Kb6 45.Qc2+-) 1-0. Mely (2860) - drogo (2045), ChessWorld.net, 2011.

4.h3 Bf3 5.Qf3 Nf6 6.Bb2 e6 7.b5 Bd6 8.c4 ab5 9.cd5 ed5 10.Bb5 Nc6? (10...c6 11.Bf6 gf6 12.Be2=) 11.0-0 (11.Bf6 Qf6 12.Qf6 gf6+/–) 11...0-0 (11...Be7+=) 12.Nc3 (better is 12.Bf6!? Qf6 13.Qf6 gf6 14.Bc6 bc6 15.Nc3+/–) 12...Ne5= 13.Qf5 c6 14.d4 Nc4 (14...cb5 15.de5 Be5 16.Qe5+–) 15.Bc4 dc4 16.Rfe1 (16.Rfc1 b5=+) 16...Nd5 (16...b5 17.Ne4=+) 17.e4 Ne7 (17...Nb4 18.Re2=+) 18.Qg5 (18.Qf3 Qb6 19.Reb1 Rfd8= (< 19...Qd4 20.Nb5 Qc5 21.Bd4 Qb5 22.Rb5 cb5 23.Qg4+/–)) 18...f6 (18...b5 19.a3=) 19.Qg4+= Ng6 20.Rad1 Qe7 21.d5=+ Ne5 22.Qe6 Qe6=+ 23.de6 Bb4 24.Re2 Nd3–+ 25.Ba1 Rfe8 26.Rc2 Re6 27.f3 Bc5 28.Kf1 f5 29.ef5–/+ Re5 30.Ne4 Rf5 31.Rc4 Nb4?? 32.Nc5+– Na2 33.Nb7 1–0. gtate – dedektor, net–chess.com, 2001.

4.c4 e6 5.Bb2 Ngf6 6.a3 c6 7.h3 Bh5 8.b5 h6 9.a4 Bd6 10.d4 0-0 11.c5 Bc7 12.Be2 Re8 13.0-0 Ne4 14.Nbd2 f5 15.Ne4 fe4 16.Nd2 Be2 17.Qe2 e5 18.Nb3 ed4 19.Bd4 Qe7 20.Qh5 Rf8 21.Rab1 Kh7 22.bc6 bc6 23.Bc3 g6 24.Qe2 Rab8 25.Ba5 Nc5 26.Bc7 Rb3 27.Rb3 Nb3 28.Bg3 Qb7 29.Qc2 c5 30.Qc3 Rf5 31.Rb1 c4 32.h4 h5 33.Bf4 a5 34.Bc7 Qb4 35.Ba5 Qa4 36.Bd8 Qa2 37.Rb2 Qa1 38.Kh2 Qa8 39.Bc7 Qa7 40.Bd6 Qb6 41.Bg3 Qf6 42.Qc2 Qg7 43.Ra2 Rf7 44.Ra8 Ra7 45.Rd8 Rd7 46.Rc8 Qa1 47.Bf4 Ra7 48.Rc7 Rc7 49.Bc7 Kg7 50.Kg3 Kf7 51.Kf4 Ke6 52.f3 Qa7 53.fe4 Qc7 54.Kf3 Qe5 55.ed5 Qd5 56.Kg3 Qe5 0–1. Bulcourf – Ginzburg, Acasusso 1994.

4.c4 e6 5.Bb2 Ngf6 6.b5 Nc5 7.cd5 Qd5 8.Bf6= gf6 9.Nc3 Nd3 10.Bd3 Qd3 11.Qe2 Qe2 12.Ke2 Bb4 13.Rhc1 0-0-0 14.h3 Bf5 15.d4 Ba3=+ 16.e4 Bc1 17.Rc1 Bg6 18.Ke3 Rhe8 19.g4 h5 20.Ne2 hg4 21.hg4 Rd6 22.a4 Kb8 23.Nd2=+ Rc8 24.f4 f5 25.gf5 ef5 26.e5 Rd7 27.Rh1 c5 28.bc6 Rc6 29.Kd3 f6 30.Rh8 Kc7–/+ 31.e6 Re6–+ 32.Nc3 Rh7 33.Nd5 Kc6 34.Nb4 Kd7 35.Rg8 Rh3 36.Kc2 Bf7 37.Rf8 Re7 38.d5 a5 39.d6 Kd6 (39...Kd6 40.Rd8 Kc7–+; 39...ab4?! 40.de7 Rc3 41.Kd1 Ke7 42.Rb8–+) 0–1. Bulcourf,Carlos – Scarella,Enrique, Buenos Aires, 1992.

4.a3 e4 5.h3 Bh5 6.g4 Bg4 (6...ef3!? 7.gh5 Qf6=) 7.hg4+= ef3 8.Qf3 Qf6 9.Qf6 Nf6 10.Be2 Nbd7 11.Bb2 0-0-0 12.d3 g5 13.Nd2 Bg7 14.0-0-0 c5 15.Rdg1 cb4 16.ab4 Rhe8 17.Nf3 h6 18.Nd4 Bf8 19.Nf5 Ng8 20.Bd4 (20.c3 Ne5+/–) 20...Re6 (20...Bb4 21.Ba7 b6=) 21.c3+/– a5 (21...a6 22.Kc2+/–) 22.ba5+– Ra6 23.Kc2 Ne7 (23...Ra5 24.Ra1 Ra1 25.Ra1+–) 24.Ra1 Nc6 25.Bh8 Na5 26.d4 Nc4 27.Ra6 ba6 28.Bc4 dc4 29.Bg7 Bg7 30.Ng7 Nf6 31.f3 (31.Rh6 Ng4 32.Ra6 Nf2 33.Rc6 Kb7 34.Rc4 g4+/–) 31...Ng8 32.Nf5 Kc7 33.Nh6 Ne7?? (33...Nh6 34.Rh6 Rd6 35.Rd6 Kd6+–) 34.Nf7 Nd5 (34...Rd5 35.Rh7 Kb8 36.Ne5 Re5 37.de5+–) 35.e4 (35.Nd8!? Kd8 36.Kd2 Nc7+–) 35...Rf8 36.Ng5 (36.ed5?! Rf7 37.Rh6 Rf3 38.Rc6 Kd7 39.Rc4 Rf4+–) 36...Nf4 37.Rh7 Kd6 (37...Kc6 38.Rf7 Rf7 39.Nf7+–) 38.Rh6 Ke7 39.Ra6 Rh8 40.Ra7 Kf6 41.Rf7 Kg5 42.Rf5 Kg6 43.Rf4 Rh2 44.Kc1 Rh1 45.Kb2 Rf1 46.e5 Kg5 (46...Rh1 47.e6 Rh8 48.d5 Rb8 49.Kc2+–) 47.Rf5 Kg6 48.d5 Rd1 49.d6 Re1 (49...Rd3 50.Rf4 Kg5 51.Rc4 Rd2 52.Kc1+–) 50.Ka3 (50.d7 Rd1 51.e6 Kh7+–) 50...Re2 (50...Rd1+–) 51.Kb4 1–0. Pareja Mohorte – Selva Salvador, Valencia Preferente, 1995. (=1.Nf3 d5 2.b4 Bg4 3.e3 e5)

4.Bb2 Bd6 5.a3 Nd7 (5...Nf6 6.h3 Bf3 7.Qf3 Nbd7 8.Nc3 e4 9.Qd1 0-0 10.Be2 a5 11.b5=; 5...Qf6 6.h3 (6.c4 dc4 7.Bc4 Ne7 8.d3 Ng6 9.Nbd2 Nh4 10.0-0 Nf3 11.Nf3=; 6.Be2 Ne7 7.Nc3 c6 8.e4 d4 9.Na2 Bf3 10.Bf3 a5 11.c4=) 6...Bf3 7.Qf3 Qf3 8.gf3 Nd7 9.f4 f6 10.Nc3 c6 11.Rg1=) 6.h3 (6.Be2 Ngf6 7.Nc3 c6 8.h3 Bf5 9.0-0 0-0 10.Nh4 Be6 11.Nf3=+; 6.c4 dc4 7.Bc4 Ngf6 8.d3 0-0 9.h3 Bf5 10.Nh4 Be6 11.Be6=) 6...Be6 (6...Bh5 7.Nc3 e4 8.g4 ef3 9.gh5 Qg5 10.Qf3 c6 11.Qg4+=) 7.d3 (7.Nc3 a6 8.Be2 Qf6 9.Rg1 Ne7 10.Rb1 0-0 11.b5–/+) 7...a5 8.b5 (8.Nbd2 Ngf6 9.Be2 ab4 10.ab4 Ra1 11.Qa1=+) 8...Ne7 (8...Ngf6 9.c4 dc4 10.dc4 Qe7 11.Nbd2=+) 9.Nbd2 (9.Ng5 Bf5 10.e4 Bg6 11.ed5=+) 9...0-0 10.Be2 (10.c4 f6 11.cd5=+) 10...c6 11.a4 (11.bc6=+) 11...cb5 12.ab5 a4 13.Ba3 Ba3 14.Ra3 Qa5 15.d4 e4 16.Ng5 Rfc8 17.c4 (17.Ne6 fe6 18.0-0 Rc3=) 17...dc4 18.Ne6 fe6 19.0-0 Qb4 (19...Qb5 20.Qa1–/+) 20.Ra2 (20.Qc1 Ra5=+) 20...Nf6 (20...Qb5!? 21.Rc2 Nb6–/+) 21.Qc2 Qb5 22.Bc4 Qc6 23.Qb2 Ned5 24.Rb1 b6 25.Ra3 (25.Bb5!? Qc7 26.Ra4 (worse 26.Ba4 Nc3–/+) 26...Ra4 27.Ba4=) 25...Ra5=+ 26.g3 h6 27.Kg2 Qd6 28.Qa1 Qd7 29.Qb2 Qd6 30.Rba1 (better 30.Qa1!?=) 30...b5!–/+ 31.Bb5 (31.Be2!?–/+) 31...Qb6–+ 32.Nc4?? (better 32.Rb1 Rb8 33.Ba4 Qb2 34.Rb2 Rb2 35.Nc4 Ra4 36.Ra4–+) 32…Rc4 (32...Qb5?! 33.Qb5 Rb5 34.Nd6=) 0–1. Abbasov,Farid (2440) – Fridman,Daniel2 (2590), Dos Hermanas Internet Final, ICC INT, 2004. (=1.Nf3 d5 2.b4 Bg4 3.e3 e5)

4.Bb2 Bd6 5.c4 A) 5...dc4 6.h3 (6.Bc4 Nd7 7.h3 Bh5 8.a3 a5 9.b5 Ne7 10.Nc3 0-0 11.0-0=) 6...Bh5 7.g4 Bg6 8.Ne5 Be5 9.Be5 Qd5 10.Bg7 Qh1 11.Nc3=; B) 5...Nd7 6.cd5 (6.c5 Be7 7.h3 Bf3 8.Qf3 e4 9.Qf5 Bf6 10.d4 ed3 11.Bd4=+) 6...Bb4 7.Bb5 Bd6 8.h3 Bf3 9.Qf3 Ngf6 10.Nc3 0-0 11.0-0=.

4.Bb2!? Bd6 5.h3 Bf3 6.Qf3 =.

4.Bb2 e4 5.h3 Bh5 (5...Bc8 6.Nd4 Nf6 7.a3 a5 8.b5 Bd6 9.Be2 0-0 10.0-0 c5 11.bc6=) 6.g4=+ Bg6 7.Ne5 Ne7 8.a3 Nbc6 9.Ng6 Ng6 10.d3 Qe7 11.Nd2=.

4.Bb2 f6 A) 5.c3 A1) 5...a5 6.ba5 (6.Qa4 Nd7 7.Qb5 Ne7 8.a3 Ra7 9.Qa4 Bf3 10.gf3 c6 11.Qc2=+; 6.Be2 ab4 7.cb4 Bd6 8.a3 Ne7 9.Nc3 0-0 10.Qb3 c6 11.0-0=+; 6.a3 ab4 7.ab4 Ra1 8.Ba1 e4 9.h3 Bh5 10.Qa4 c6 11.Nd4=; 6.Qb3 ab4 7.cb4 c6 8.d4 Bf3 9.gf3 Bd6 10.b5 Ne7 11.de5=+) 6...e4 7.h3 Bh5 8.Qa4 c6 9.Nd4 Ra5 10.Qc2 Bd6 11.c4=; A2) 5...e4 6.h3 Bh5 7.Qa4 Qd7 8.Qd7 Nd7 9.Nd4 Bf7 10.d3 a5 11.de4=; A3) 5...Nd7 6.Qb3 (6.Be2 e4 7.Nd4 Be2 8.Ne2 Ne5 9.Nf4 Qd7 10.d4 Nc4 11.Qc2=+; 6.d3 Bd6 7.Be2 Ne7 8.0-0 0-0 9.Nbd2 a5 10.b5 c6 11.a4=; 6.h3 Bf5 7.Be2 Bd6 8.0-0 Ne7 9.d3 0-0 10.Nbd2 Be6 11.a4=+) 6...Nb6 7.c4 dc4 8.Bc4 Nh6 9.d4 Nc4 10.Qc4 Bf3 11.gf3=; A4) 5...Bd6 6.d3 (6.Be2 Ne7 7.0-0 0-0 8.d3 Nd7 9.Nbd2 c5 10.bc5 Nc5 11.d4=+; 6.h3 Bh5 7.Be2 Ne7 8.0-0 Nd7 9.d3 0-0 10.Qd2 a5 11.b5=+; 6.Bb5 c6 7.Be2 Ne7 8.0-0 0-0 9.d3 a5 10.a3 b5 11.Nfd2=+; 6.Qe2 c6 7.e4 Ne7 8.h3 Be6 9.ed5 Bd5 10.d4 Ng6 11.de5=+) 6...Ne7 7.Be2 0-0 8.0-0 Nd7 9.Nbd2 a5 10.b5 Be6 11.a4=; B) 5.a3 B1) 5...e4 6.h3 Bh5 7.g4 Bg6 8.Nh4 Bf7 9.d3 a5 10.b5 ed3 11.Bd3=; B2) 5...Bd6 6.Be2 (6.c4 e4 7.h3 Bh5 8.Qa4 Qd7 9.Qd7 Nd7 10.Nd4 dc4 11.Ne6=; 6.h3 Be6 7.Be2 Ne7 8.0-0 0-0 9.d4 e4 10.Nfd2 Qe8 11.c4=; 6.Qe2 c6 7.e4 Ne7 8.h3 Bh5 9.Nc3 f5 10.ef5 e4 11.Ne4=+; 6.Bb5 Nd7 7.h3 Bh5 8.Be2 a5 9.b5 Ne7 10.0-0 0-0 11.Nc3=+) 6...Ne7 7.0-0 0-0 8.c4 c6 9.Nc3 Bf3 10.Bf3 e4 11.Be2=; B3) 5...a5 6.b5 (6.ba5 Bd6 7.Be2 Ra5 8.h3 Be6 9.Nc3 c6 10.d4 e4 11.Nd2=+) 6...e4 7.h3 Bh5 8.g4 Bg6 9.Nh4 Bf7 10.d3 ed3 11.Bd3=; B4) 5...c5 6.bc5 Bc5 7.h3 Bh5 8.g4 Bg6 9.d4 Qb6 10.Ra2 ed4 11.Bd4=.

4.b5 e4 5.h3 Bd7 6.Nd4 c5 7.bc6 bc6 8.c4 Nf6 9.Be2 Bd6 10.Ba3 Ba3 11.Na3= Qa5 12.Nac2 Na6 13.Nb3 Qc7 14.Rc1 Qd6+= 15.0-0 0-0 16.Ncd4 Rab8?? 17.c5+– Qc7 18.Ba6 1–0. pumpkin (2280) – cczekaj (2560), net–chess.com, 2008.

4.c4 Bb4 5.Qa4 Nc6 6.Ne5 +=.

4.c4 e4–/+ 5.h3 Bd7 6.Ne5 Qf6 7.Bb2 Bd6 (7...Nc6 8.Nd3 (8.Nd7 Qb2 9.Nc3 Kd7+/–) 8...Qf5 9.cd5 ed3 10.dc6 Bc6 11.Bd4=) 8.Nd3 (8.Nd7? Qb2 9.Nb8 Qa1–+ (9...Rb8?! 10.Nc3 Qb4 11.Rb1+=)) 8...Qg6 (8...Qg5 9.c5 Be7 10.h4=) 9.Nc5 (9.c5 Bg3 10.Ne5 Be5 11.Be5 Nc6 12.Bc7 Nb4+=) 9...dc4 (9...Bc5 10.bc5 dc4 11.Na3=+) 10.Nb7 Bb4 11.a3 Be7 12.Na5 Nc6 13.Nc6 Bc6 (13...Qc6? 14.Bg7 Bf6 15.Bh8 Bh8 16.Nc3+–) 14.Qg4 Qg4 15.hg4 Bf6 16.Bf6 (16.Bc3 Bd5=+) 16...Nf6 (< 16...gf6 17.Bc4 Rb8 18.Nc3+=) 17.g5 Nd7 18.Bc4 Ne5 19.Be2 0-0 (19...Nd3 20.Bd3 ed3 21.f3=+) 20.Nc3 Rab8 21.Rh4 Ng6 22.Re4 Be4=+ 23.Ne4 Rfe8 24.f3 Nf8 25.Bc4 Nd7 26.Rc1 Re7 27.d4 Rb2 28.Kf1 Nb6 29.Rc3 Kf8 30.Kg1 Rb1 31.Kf2 Ra1 32.Nd2 Rd7 33.Ke2 c5=+ 34.dc5 Na4 35.Rc2 Nc5 36.Bb5 Rd5 37.Bc6 Rd2 38.Kd2+= Ne6 39.a4 Ng5 40.Rc5 Ra2= 41.Kc3 Rg2 42.Ra5 Rg3 43.Ra7 Nf3= 44.a5 Ne5=+ 45.Bd5 Rg6 46.Rc7 Rd6 47.Kd4 Nd7? 48.e4+– f6 49.a6! Ra6 50.Rd7 g5 51.Rf7 Ke8 52.Rh7 1–0. Bulcourf,Carlos (2215) – Garbarino,Rodolfo (2415), Siembra Villa Ballester op, 1996.

4.c4 e4–/+ 5.h3 Qf6 6.Nc3 Bf3 7.gf3 dc4 8.a3 ef3 9.Bc4 =.

4.c4 e4 5.h3 Bh5 6.g4 ef3 7.gh5+= Bb4 8.Qb3 c5 9.Rg1 Nf6 10.a3 Ba5 11.Rg7 Nh5 12.Rg1 Nf6 13.cd5 Qd5 14.Bc4 Qd7 15.Rg7 Rf8 16.Bb2 Bd8 17.Nc3 Nc6 18.Nb5 Ne4 19.Bd5 a6 20.Be4+– Na5 21.Nd6! Qd6 22.Qd5 Qd5 23.Bd5 Be7 24.Bf3 h6 25.Bc3 Nc6 26.Rh7 0-0-0 27.Bc6 bc6 28.Rb1 Rd6 29.Ke2 Rg6 30.Bg7 Rd8 31.Bh6 Rgd6 32.Rb2 Bf6 33.Rc2 Be5 34.h4 R6d7 1–0. Tatjana – pierre, internet, 2011.

4.c4 e4–/+ 5.h3 Bh5 6.g4 (6.Qa4 Qd7 7.Qd7 Nd7–/+) 6...Bg6 (6...ef3 7.gh5 Bb4 8.a3–/+) 7.Nd4 (7.Ne5 Nf6=+) 7...dc4–/+ 8.Bg2 (8.Bc4!? Bd6 9.Bb2–/+) 8...Nd7 (8...Nf6 9.Bb2–+) 9.Nc3 (9.Qc2 Ne5 10.Be4 Nf6–/+) 9...h5 (9...Ngf6 10.Qc2 Ne5 11.Qa4 c6 12.0-0–+) 10.gh5 (10.Ne4 Bb4 11.Bb2–/+) 10...Bh5=+ 11.Qa4 (11.Qc2 c6=+ (< 11...Bb4 12.Qe4 Ne7 13.Qb7+=)) 11...c6 (11...a5!? 12.Qc2 ab4 (12...Bb4?! 13.Qe4 Ne7 14.Nf5=) 13.Ne4 Ne5–+) 12.Ne4 Ngf6 (12...Ne5 13.Bf1–/+) 13.Ng3 (13.Nf6!? Qf6 14.Bb2=+) 13...Nb6 (13...Ne5 14.0-0 Qd7 15.Nh5 Rh5 16.Bb2–/+) 14.Qa5=+ Nfd5 15.Ba3 (15.Nh5 Rh5 16.b5 Bb4 17.Nc6 bc6–+) 15...Be7 (15...Bd6 16.Ndf5 Be5 17.Rc1=+) 16.Rc1 (better is 16.Ngf5 Rh7 17.Ne7 Qe7 18.Qc5=) 16...c3 (16...Bg6 17.Ngf5 Rh7 18.Ne7 Ne7 19.b5+=) 17.d3 (17.dc3 Nc4 18.Qd8 Rd8 19.Nh5 Rh5 20.Bf3–/+) 17...Bg6= 18.Ngf5 (18.Be4 Be4 19.de4=) 18...0-0 (18...Bf6 19.b5 Bd4 20.Nd4 Bd3 21.bc6 bc6 22.Rc3+=) 19.Bd5 (19.Be4 Bf5 20.Nf5 Re8+=) 19...Nd5 20.Qd8 Bd8 21.b5 cb5 22.Bf8+/– Kf8 23.Ke2 Bf6 24.h4 Re8 25.h5 Bh5 26.Rh5= Nf4 27.Kf3 Nh5 28.Nb5 Re5 29.Nfd4= Rc5 30.Rc3?? Rc3?? 31.Nc3= Bd4 32.ed4 Ke7 33.Ke4 Nf6=+ 34.Kf5 Kd7 35.f3 Ne8 36.Ke5 Nd6 37.a4 f6=+ 38.Kd5 b6 39.Na2 Ne8 40.Nc3 a6 41.Ne4 Nc7 42.Kc4 Kc6 43.Nc3 b5=+ 44.ab5 ab5 45.Kb3 f5 46.f4 Nd5–/+ 47.Ne2 g6 48.Ka3 Kb6 49.Kb3 Ka5 50.Ng1?? Nf4–+ 51.Nf3 Nd5 52.Ng5 Kb6 53.Nf3 Kc7 54.Kc2 Kd6 55.Ne5 Nf4 56.Kd2 Kd5 57.Ke3 g5 58.Nd7 Ng2 59.Kf3 Nh4 60.Ke3 f4 61.Ke2 Kd4 62.Nf8 g4 63.Ne6 Ke5 64.Nd8 g3 65.Nc6 Kd5 66.Nb4 Kd4 67.Nc6 Kc3 68.d4 f3 69.Ke3 f2 70.Ke2 Nf5 71.d5 Ne3 (72.Ke3 f1Q–+) 0–1. Bulcourf,Carlos (2230) – Valerga,Diego (2430), Villa Ballester op, 1994.

4.Be2 Nd7 5.a3 c5 6.bc5= Bc5 7.0-0 Ngf6 8.Bb2 e4 9.Ne5= Be2 10.Qe2 Qc7 11.Nd7 Nd7 12.Bg7+= Rg8 13.Bc3 0-0-0 14.d4 Bd6= 15.h3 Nf8 16.Bb4+/– Bh2 17.Kh1 Ng6 18.Nc3+– Nh4 19.g3 Nf3 20.Qf3?? ef3–+ 21.Kh2 Rg6 22.Nb5? Qc4 23.Nc3 b6 24.Na2 Rdg8 25.Be7 Qc7 26.Bh4 Kb7 27.c4?? Qc4 28.Nb4 a5 29.Rac1 Qb3 30.Nc2? Rc6 31.Na1 Rc1 32.Rc1 Qb2 33.Rf1 Rc8 34.Bf6 Rc1 (34...Rc1 35.g4 Rf1–+) 0–1. khani9 – golly1, ChessWorld.net, 2007.

4.Be2 Nd7 5.c3 Ngf6 6.Qa4 (6.0-0!?+=) 6...e4 7.Ne5 Be2 8.Ke2 c6 9.Nd7 Nd7 10.Na3 a5 11.b5 Nc5 12.Qd4 Nd3 13.Nc2 (13.Qa4 Qg5 14.Rg1–+) 13...c5 (13...cb5?! 14.Ne1 Nc5 15.Qe5 Ne6 16.d3–/+) 14.Qa4 Qh4 15.b6 Kd8 16.g3 (16.Ne1 Qf2 17.Kd1 Ne1 18.Re1 Qg2 19.Qb3 Qg4 20.Kc2–+) 16...Qg4 17.Kf1 Qf3 18.Ne1 (18.Qe8 Ke8 19.Kg1 Qf2) 18…Qf2 0–1. Papa Lazarou – marekt, ChessWorld.net, 2012. (=1.Nf3 d5 2.b4 Bg4 3.e3 e5)

4.Be2 Bf3 5.Bf3 Bb4 6.e4 de4 7.Be4 Qd4 8.f3?? (better is 8.Bb7 Qa1 9.a3+=) 8...Bc5–+ 9.Qe2 Qa1 10.Qb5 (10.Bb7 Nd7 11.Ba8 Qb1 12.Qd1–+) 10...Nd7 11.c4 (11.Qb3 Qd4 12.Rf1 c6–+) 11...Bd4 12.Qb7 (12.Bb7 Rb8 13.Ba3 Qa2–+) 12...Rb8 13.Qc7 Ngf6 (13...Ngf6 14.Bd3 Rb1 15.Bb1 Qb1 16.Qc8 Ke7–+) 0–1. Popp,Tony (1830) – Valade,Patrick (2110), SEMI A012 email, 2000. (=1.Nf3 d5 2.b4 Bg4 3.e3 e5)

4.Be2 Bf3 5.Bf3 e4 6.Be2 Bb4 7.Bb2 Nf6 8.c4 –/+.

4.Be2 Bf3 5.Bf3 e4 6.Be2 Bb4 7.c4 Bd6 (better is 7...Qf6!? 8.Nc3 Bc3 9.dc3 dc4 10.Qa4 Qc6 11.Qc4 Qc4 12.Bc4 Nf6–/+) 8.cd5 Nd7 (8...c6 9.Qb3 Qe7 10.d3=) 9.Bb2 (9.Nc3!? Ngf6 10.Rb1=) 9...Qg5+= 10.0-0 Ngf6 (worse is 10...Qd5 11.Bg7 Ngf6 12.Bh8+/–) 11.Nc3 Qe5 12.g3 h5 13.Qc2 h4 14.Nb5 (14.d4 ed3 15.Qd3 hg3 16.hg3 Nc5 17.Qb5 Kd8+=) 14...Qf5 (14...Qd5 15.Bf6 Nf6 16.Qc7 Bc7 17.Nc7 Ke7 18.Nd5 Nd5 19.f3 hg3 20.hg3=) 15.Nd6 cd6 16.Bb5 Qh3?? (16...Qd5!? 17.Bf6 gf6+=) 17.Bd7 (better is 17.Bf6!? gf6 18.Qe4 Kd8 19.Bd7 Kd7 20.Rab1+–) 17...Kd7+= 18.Qa4 (18.Qb3 b6 19.Qa4 Kd8 20.Bf6 gf6=) 18...Kd8= 19.Bf6 gf6 20.Qe4 (20.Qa5 Ke8 21.Qb5 Kf8 22.Qe2= (22.Qb7?? Kg7 23.Qa8 Ra8–+)) 20...hg3–+ 21.Qg2 gh2 22.Kh1 Qh4 (22...Qh5 23.Rfb1 b6 24.d3–+) 23.Rac1 Kd7 24.f4?? (better is 24.Rc3 Rhg8 25.Qf3–+) 24...Rag8–+ 25.Qe4 (25.Qf3 Rg3 26.Qe2 Rhg8 27.Qg2 Rg2 28.Rc7 Kc7 29.Rc1 Kd7 30.Rc7 Kc7 31.e4 Qe1) 25...Rg1! 26.Rg1 hg1Q (26...hg1R 27.Kg1 Qh2 28.Kf1 Qh1 29.Qh1 Rh1 30.Ke2 Rc1 31.Kd3–+) 27.Kg1 Qh2 28.Kf1 Qh1 (28...Qh1 29.Qh1 Rh1 30.Ke2 Rc1–+) 0–1. Fastovets,Arsen – Peppas,Hrisovaladis (1855), 29th Mukachevo Rating, 2016. (=1.Nf3 d5 2.b4 Bg4)

4.h3 Bf3 5.Qf3 e4 (5...Bb4 6.Bb2 f6 7.Qg4=+) 6.Qg3 (6.Qe2 Bb4 7.Qb5 Nc6 8.Qb7 Nge7=+) 6...Nf6 (6...Qf6 7.c3 Bd6 8.Qg4–/+) 7.Nc3 (7.Bb2 Nbd7=) 7...Nbd7 (7...Bb4 8.Qg7 Rg8 9.Qh6–/+) 8.Be2 (8.Nb5 Rc8 9.Na7 Ra8+=) 8...c6 (8...Bd6 9.Qg5 h6 10.Qg7 Rh7 11.Qh7 Nh7–+) 9.d3? (9.a3 a5 10.Bb2 ab4 11.ab4 Ra1 12.Ba1 Bb4–/+) 9...g6 (9...Bb4 10.Bb2–/+) 10.de4? (10.Rb1 Bg7 11.Bb2 Qb6=) 10...de4 (10...Bb4 11.Bd2 Bc3 12.Bc3 Ne4 13.Bh8 Ng3 14.fg3 Qg5–+) 11.Bb2 Bg7 12.Qg5 0-0 13.0-0-0 Qb6 14.a3 Rad8 15.h4 h6= 16.Qa5 Qa5–/+ 17.ba5 h5 18.f3 Nc5 19.Rd8 Rd8=+ 20.f4 Ng4 21.Nd1 Bb2–/+ 22.Kb2 Rd2 23.Bg4 hg4 24.Rg1 Re2 25.g3 Kg7 26.Kc3 b5 27.Rf1? Rg2 28.f5 Rg3 29.f6 Kh6 30.Kb4 Rf3 31.Rg1 White gets the initiative 31...g3?? 32.Kc5+/– Kh5 33.Kc6 Kh4 34.Nc3 Re3 35.Nb5 a6 36.Nd4 Ra3+= 37.Kb6 Ra4 38.Ne2 Ra3 39.c3 Ra2? 40.Ng3 Ra4 41.Ka6 Rc4 42.Ne2 Rc6 43.Kb7 Rf6 44.a6 Rf2 45.a7 Re2 46.a8Q Rb2 47.Kc6 (47...Rg2 48.Rg2 Kh3 49.Rg1 Kh2 50.Rg5 f5 51.Qh8#) 1–0. gdraper (1715) – ramesis, net–chess.com, 2006.

4.h3 Bh5 5.g4 Bg6 6.Ne5 Bb4 7.Ng6 hg6 8.c3 Ba5 9.Qb3 Ne7 (better is 9...Bb6!?=) 10.Qb7+/– Nbc6 (better is 10...Nd7!?+/–) 11.Bb5+– Rb8? (better is 11...Kd7 12.Ba3 Qc8 13.Bc6 Nc6+–) 12.Bc6 Kf8 13.Qa6 (13...Nc6 14.Ba3 Kg8 15.Qc6+–) 1–0. quaternion (2305) – red_star (1945), ChessWorld.net, 2003.

5.h3 Bf3 6.Qf3 Ngf6=.

6.h3 ef3? 7.hg4 fg2 8.Bg2+–.

6.h3 Bh5 7.g4 Bb4?? 8.Bg7 (8.gh5?! Ngf6+/–) 8...Bg6 9.Nh2+– (9.Bh8?! ef3 10.cd5 Ngf6+–).

6.h3 Bh5 7.g4 ef3 8.gh5 Qg5 9.Qf3+–.

6.h3 Bh5 7.g4 Bg6 8.Ne5 Qf6 (8...Ne5 9.Be5 Ne7 10.Nc3=+) 9.Qa4 c6 10.cd5 (10.Ng6? Qb2 11.Nh8 Qa1–+) 10...Ne5 11.dc6 Nf3 (11...bc6!? 12.Be5 Qe5 13.Qc6 Ke7 14.Qb7 Kf6+–) 12.Kd1= b5 (12...Qc6?? 13.Bb5 Ne7 14.Bc6 Nc6 15.b5+–) 13.Qb5 Qb2 14.c7 Ke7 15.Qb7 Kf6 (15...Qa1 16.c8Q Kf6 17.Qc3 Qc3 18.Nc3+– (18.dc3?! Rd8 19.Kc1 h5+–)) 16.Qa8 1–0. elgin43 (2015) – marekt (2130), gameknot.com, 2014.

6.h3 Bh5 7.g4 Bg6 8.Ne5 Qf6 (8...Ne5 9.Be5 dc4 10.Bc4+=) 9.Qa4 (better is 9.Ng6!? Qg6 10.cd5=) 9...c6–/+ 10.cd5? (10.g5 Qg5 11.Nd7 Kd7=) 10...Ne5–+ 11.dc6 Nf3 (11...bc6!? 12.Be5 Qe5 13.Qc6 Ke7 14.Qb7 Kf6+=) 12.Kd1+= b5 (12...Qc6? 13.Bb5 Ne7 14.Bc6 bc6 15.b5+–) 13.Qb5 Qb2 14.c7 Ke7 15.Qb7 Kf6 16.Qa8 Ne7 17.Qd8 Ke5 18.Bc4?? (better is 18.Qb8 Kf6 19.Qd8=) 18...h5?? (18...Qa1 19.Ke2 Nd4 20.ed4 Qd4+=) 19.g5 (19.g5 Bf5 20.c8Q Bc8 21.Qc7 Kf5 22.Qf4 Kg6 23.Bf7 (worse is 23.Qe4 Nf5–/+) 23...Kh7 24.g6 Ng6 25.Qe4+=) 1–0. objorn (2425) – marekt (2195), gameknot.com, 2015.

4.a3 Bd6 5.d4 Nf6 6.Be2 Bf3 7.Bf3 Nbd7 (7...c6 8.Nd2+=) 8.0-0 (8.c4 c6=) 8...Ne4 (8...c6 9.Nd2=) 9.g3 (9.c4 Qh4 10.g3 Qf6=) 9...Ndf6 10.Bb2 h5 11.h4 (11.c4 h4= (11...dc4? 12.Qc2+–)) 11...Bg3 (better is 11...g5!? 12.hg5 Ng5–/+) 12.fg3= Ng3 13.Rf2 Nfe4 (13...Nfe4 14.Rh2 Nf5=) 0–1. Shaver,Rick – Hart,Thomas, S80051 – Winter Series, 2008.

4.a3 Nf6 5.h3 Bh5 (5...Bf3 6.gf3 a5 7.b5=+) 6.d4 (6.Nc3 a5 7.ba5 Nc6=) 6...a5 7.b5 c5 8.bc6 Nc6 9.Nbd2 Bd6 10.c4 0-0 11.Be2 e5 12.Bb2 ed4 13.Nd4 Be2 14.Qe2 Rc8 15.0-0 Re8 16.Rfd1 Nd4 17.Bd4 Be5 18.Be5 Re5 19.Nf3 Rh5 20.Qf1 Qd7 (20...Rc4?? 21.Qc4 g6 22.Qb5+–) 21.g4 Ng4 22.hg4 Qg4 23.Qg2 Qc4 24.Rd4 Qc5 25.Qg4 g6 26.Qd7 Rf5 27.Ne1 Rb8 28.Nd3 Qc6 29.Qc6 bc6 30.Rc1 Rb3 31.a4 Rb6 32.Rc5 Rg5 (32...Ra6 33.Nc1+–) 33.Kf1 Ra6 34.Nc1 Kf8 35.Nb3 1–0. eekan (1900) – marekt (2125), gameknot.com, 2014.

4.Bb2 Nf6 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 e6).

4.Bb2 Nf6 5.a3 Nbd7 6.Be2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3 Nbd7 5.Be2 e6 6.a3).

4.c4 Nf6 5.a3 a5 6.b5 Nbd7 7.d4 Ne4 8.Qc2 Qf6 9.cd5 ed5 10.Nbd2 Nd2 11.Nd2 (11.Kd2?? Bf3 12.gf3 Qf3 13.Qc7 Qh1–+) 11...Bd6 12.Bd3 Qg5 13.a4 (13.Bh7? g6 14.e4 Rh7–+) 13...g6 14.Ba3 0-0 15.h3 Be6 16.Nf3 Qf6 17.0-0 Rfc8 18.Qe2 Nb6 19.Rfc1 Bf5 20.Bf5 Qf5 21.Nd2 Kg7 22.Bc5 h5 23.Qe1 Bc5 (23...Qe6!?=) 24.dc5+– Nd7 25.Nb3 Ne5 26.Qd2 Qd3 (26...b6 27.cb6 cb6 28.Rc8 Rc8 29.Qd5+–) 27.Qb2+– f6 28.Rd1 Qe4 29.Rd4 Qf5 30.Qd2 (worse 30.Rd5 Nf3 31.gf3 Qd5–/+) 30...c6 31.Na5 cb5 32.Nb7 (worse 32.ab5 Rc5 33.Rc1 Rb5–+) 32...Qd7 33.Na5 ba4 (33...Rc5 34.Nb3 Rc4 35.Rd5+–) 34.Rd5 Qb5 35.c6 Qb6 36.Ra4 Nc6 37.Rd7 Kh6 38.e4 g5 39.Rd6 (39.Rd6 Kg7 40.Qa2+–) 1–0. blacklab (2330) – marekt (2125), gameknot.com, 2014.

4.c4 Nf6 5.a3 Be7 6.h3 Bh5 7.Be2 0-0 8.cd5 Nd5 9.Bb2 a5 10.b5 c6 11.Nc3 cb5 12.Nb5 a4 13.0-0 Nc6 14.Rc1 (14.Rb1 Ra5=) 14...Qb6 15.Ba1 Ra5 ½-½. Mely (2870) - Lotusflower7 (2505), ChessWorld.net, 2011.

4.d4 Bb4–/+ 5.c3 Ba5 6.Be2 Bf3 7.Bf3=+ Nf6 8.0-0 0-0 9.Qb3=+ b6 10.Ba3 Re8 11.c4 c6 12.c5 bc5 13.dc5 Nbd7–+ 14.Bb4 Bb4 15.Qb4 Qe7 16.Rc1 a5 17.Qb7 Rec8 18.Na3 Kf8 19.Rab1 Ne5 20.Qe7 Ke7–+ 21.Rb7 Kf8 22.e4? Nf3 23.gf3 Ne8 24.ed5 ed5 25.Nc2–/+ Rc7 26.Rb3 g5 27.Rb6 Ng7 28.Nd4 a4 29.Nc6 Rac8 30.Nd4? Rc5–+ 31.Ra1 Rc1 32.Rc1 Rc1 33.Kg2 Rc4 34.Nb5 Rb4 35.Rb8 Ne8 36.Kg3? d4 37.a3 Rb3 38.Kg4 d3 39.f4 d2 40.Rd8 Rb5 41.Rd2 Nf6 42.Kg3 Rb3 43.Kg2 gf4 44.f3 Ra3 45.Rd4 Nh5 46.Rb4 Kg7 47.Kh3 Kg6 48.Kg4 f6 49.Rb5 Ng7 50.h3 Ne6 51.h4 Rf3! 52.h5 Kg7 53.Rb4?? Ra3 54.Kf5 Ng5 55.Kf4 h6 56.Rb7 Nf7 57.Ra7 Ra1 58.Kf5 Re1 59.Ra4 Re5 60.Kg4 f5 61.Kf4 Re4 62.Re4 fe4 63.Ke4 Kf6 64.Kf4 Nd6 65.Kg4 Nf5 66.Kf4 Ng7 67.Kg4 Nf5 68.Kf4 Nd4 69.Kg4 Ke5 70.Kh4 Kf4 71.Kh3 Kg5 (71...Kg5 72.Kg3 Kh5–+) 0–1. theeagle (1740) – iboyd (2045), net–chess.com, 2007.

4.Bb2 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 Bg4 4.e3).

4.c4 e6 5.a3 a5 6.b5 Nbd7 7.cd5 ed5 8.Be2 Nc5 9.0-0 Bd6 10.h3 Bd7 11.a4 0-0 12.Qc2 Qe7 13.Ba3 Rac8 14.Rc1 b6 15.d4 Nce4 16.Ne5 g6 17.Bd6+= cd6 18.Nc6 Qe6 19.Nd2 Kg7 20.Nf1 Ng8 21.f3 Nef6 22.Ra3 Rc7 23.Rc3 Kh8 24.Qb2 Rfc8 25.Na5 Rc3= 26.Rc3 ba5 27.Rc8 Bc8 28.Qd2 Ne7 29.Qa5 Qd7 30.Qb4 Qd8 31.a5 Be6 32.Bd3 Kg7 33.Kf2 h5 34.g4 Kf8 35.Ng3+/– Qb8 36.gh5 gh5 37.h4 Bd7 38.Qb3 Qa7 39.Qa3 Nc8 40.Qb4 1–0. gioco1b4 – marekt, internet, 2011.

4.a3 Nf6 5.Bb2 Qd6 6.e3 c5 (6...Nbd7 7.d4=) 7.b5 (7.bc5!? Qc5 8.Bd4+=) 7...Nbd7= 8.d4 c4 9.Nd2 Rc8 10.Bc3 h5 11.Be2 g5 12.h4 g4 13.g3 (13.0-0 Bg7=) 13...Bf5+= 14.0-0 Bh6 15.a4 Ne4 16.Ne4 Be4 17.Nd7 Qd7 18.Kh2 Qf5 19.Ra2 Rg8 20.a5 Rg6 21.Bb4 Rf6 22.Qd2 Bf3 23.Bf3= Qf3 24.Ra3 c3 25.Rc3+/– Rc4 26.Rc4 dc4 27.Kg1 Qd5 28.c3 Qb5 29.Qc2 Rf5 30.Qe4 Qd7 31.Be7!+– Qe6 32.Qe6 fe6+/– 33.Bc5 Bf8 34.Bf8 Kf8 35.Rb1 Ra5 36.Rb7 Ra3 37.Rc7 Rc3 38.Ra7 Rc1 39.Kg2 c3 40.Rc7 Ke8 41.Rc5 c2 42.e4 Kd7 43.e5 Rd1 44.Rc2+/– Rd4 45.f3 Rd5 46.Re2 Ke7 47.fg4 hg4 48.Re4 Rd2 49.Kf1 Rd5 50.Kf2 Kf7 51.Ke3 Rb5 52.Kf4 Rb1 53.Kg4 Kg6 54.Rf4 Re1 55.Rf6 Kg7 56.Re6 Kf7 57.Rf6 Ke7 58.Rf5 Ke6 59.Rg5 1–0. Lebel Arias,Julia (2060) – Ruck Petit,Monique (2030), FRA–ch (Women), 1990.

4.Bb2 f6 5.Nd3 Bf5 6.g3 (6.e3!?=) 6...e5+= 7.b5 Bd6 8.Bg2 c6 9.0-0 Ne7 10.a4 0-0 11.f4 (11.Nc3 d4 12.Ne4 Be4 13.Be4 f5=) 11...Ng6 (11...Qb6 12.e3 e4–/+ (12...cb5?! 13.fe5 fe5 14.Be5=)) 12.e3+= Nd7 13.Nf2 ef4 14.ef4 Nc5 15.d3 Qc7 16.Nd2 Rae8 17.Nf3 Bd7 18.Nd4 Rf7 19.Re1 Re1 20.Qe1 Re7 21.Qd2 Nf4 22.gf4 Bf4 23.Qc3 Bh2 24.Kf1 Ne6 25.Nf5 Re8 26.bc6 bc6 27.Re1 Be5 28.d4 Bd6 29.Nd3 Bf8 30.Qd2 Rb8 31.Bc3 Bc8 32.Kg1 Ng5 33.Ba5 Qf7 34.Qf4 Rb7 35.Nd6 Bd6 (35...Ne6 36.Nf7 Nf4+–) 36.Qd6+– Rd7 37.Qc6 Bb7 38.Qc5 Qg6 39.Re7 (better is 39.Bb4!? h5 40.Qf8 Kh7 41.Re8+–) 39...Ne4 40.Qa3 Qg4 41.Rd7 Qd7 42.Nc5 Qg4? (42...Nc5 43.Qc5 (worse is 43.dc5 h6+/–) 43...a6 44.Qa7+–) 43.Qf3 (better is 43.Nb7 Qd1 44.Kh2 Qd4 45.Qe7+–) 43...Qc8 (43...Qf3 44.Bf3 Nc5 45.dc5+–) 44.Ne4 de4 45.Qb3 Kh8 46.Bh3 f5 (46...Qa8 47.c4+–) 47.Qf7 g6?? (47...Bc6+–) 48.Bc7 (48.Bc7 Qd8 49.Be5 Qf6 50.Bf6) 1–0. roy1nc6 (1890) – bigbadhorsey (1795), gameknot.com, 2013. (=1.Nf3 d5 2.b4 Bg4)

4.a3 Nd7 5.d4 Ne5 6.de5 e6 =+.

4.a3 Nd7 5.d4 Ngf6 +=.

4.a3 Nd7 5.Nf3 e5 6.e3 a5 7.b5 Bd6 8.c4 dc4 9.Bc4 Nh6 (9...Nb6 10.Be2=+) 10.d3= Qf6 11.e4 Bg4 12.Be3 (12.h3 Bf3 13.Qf3 Qf3 14.gf3 Ng8=) 12...0-0 (12...Bc5 13.Nc3=) 13.Qc1 (13.h3 Be6+=) 13...Bf3 (13...Bc5 14.Bh6 gh6 15.Nbd2=) 14.Bg5 Qg6 15.gf3 Bc5 16.Rg1 Kh8 (16...Be7 17.Bd5=) 17.Ke2 (17.Rg3 Qb6 18.Qd2 Ng8=) 17...Qh5=+ 18.Rg2 (18.Bh6 gh6 (< 18...Qh6 19.Qh6 gh6 20.f4+=) 19.Bd5 Qh2=+) 18...Qh3 19.Rg3 (19.Qg1 Bd4 20.Ra2 Nb6=+) 19...Qh2 20.Qf1 Qh5 21.Nc3 (21.Qh3 Qh3 22.Rh3 f5–/+) 21...f6 (21...f5 22.Qg2 f4 23.Rh1=+) 22.Bh6 Qh6 23.Qg2 g5 24.Rh1 Qg7 25.Rgh3 Rfd8 (25...Ba3?? 26.Qh2 Rf7 27.Bf7+–) 26.Rh7 Qh7 27.Rh7 Kh7 28.Qh3 Kg7 29.Qe6 Nf8 30.Qf7 Kh6 31.Qf6 (31.Nd5 Rd7 (31...Ba3?? 32.Nf6 g4 33.Ng8 Kg5 34.Qf6 Kh5 35.Qh6) 32.Qf6 Ng6+/–) 31...Ng6 32.f4 With the decisive threat Bf7 32...gf4 33.Nd5 Rf8 34.Qe6 f3 35.Kf1 Rac8 36.Nf6 Kg7 37.Nd7 (37...Ba3 38.Nf8 Rf8 39.Qd7 Be7 40.Qc7+–) 1–0. Andersson,Lars H – Guillaume,Jean Pierre, corr ICCF EU–H–1126, 1994.

4.a3 e6 5.Bb2 Nd7 6.Nd7 Qd7 7.e3 a5 8.b5 Nf6 9.Nc3 (9.Bf6 gf6 10.c4 dc4 11.Bc4 Rg8=) 9...Be7 10.d4 (10.h3 0-0+=) 10...0-0 11.Be2 Bd6 (11...Rfc8 12.Na4+=) 12.Bf3 (12.g4!? Be4 13.Ne4 Ne4 14.c4=) 12...c6–/+ 13.a4 (13.g4 Bg6–/+) 13...Rfc8 14.Rc1 (14.0-0 cb5 15.Nb5 Bc2–+) 14...Bb4–+ 15.b6 Be4 16.0-0 Bf3 17.Qf3 Ra6 (17...Bc3 18.Bc3 Ne4 19.Be1–+) 18.g4 (18.Na2 Rb6 19.c4 Bd6–/+) 18...h6 19.h4 (19.Rb1 Rb6 20.Qg2 Ra6–+) 19...Bc3 20.Bc3 Ne4 21.Be1 c5 22.c4 cd4 23.ed4 Qa4 24.cd5? Rc1 25.Qe4 Rb6 26.Qe3 Qd1 27.f3 Rb2 28.de6 Re2 29.ef7 Kf7 30.Qf4 Kg8 31.g5 Qe1 32.Qb8 Kh7 (32...Kh7 33.g6 Kg6 34.Qd6 Kh7 35.Qg6 Kg6 36.h5 Kh5 37.Re1 Rce1#) 0–1. regar – pierre, internet, 2009.

4.Bb2 Nd7 5.e3 e6 6.a3 a5 7.Nd7 Qd7 8.h4 h6 9.Nc3 (9.g4 Be4 10.f3 Bg6=+) 9...Nf6 (worse 9...ab4 10.ab4 Ra1 11.Qa1+=) 10.Bb5 (10.Nb5 c6 (10...ab4?! 11.ab4 Rc8 12.Nd4=) 11.Nd4 Be7=+) 10...c6 11.Bd3 Bd3 12.cd3 Be7 13.Na4 (13.0-0 ab4 14.ab4 Ra1 15.Qa1 0-0=+) 13...Qc7 (worse 13...ab4 14.Nb6 Qd8 15.Na8+–) 14.Qf3 h5 (14...0-0 15.0-0=+) 15.Bc3 (15.Ke2 0-0=+) 15...ab4 16.ab4 0-0 17.0-0 Ng4 18.Qh3 (18.g3 e5=+) 18...b6 19.Rfc1 (19.f3 Nh6–/+) 19...Rfb8 20.f3 (20.d4 Rb7 21.Nb2 Ra1 22.Ra1 Ra7=+) 20...Nh6–/+ 21.e4 (21.b5 Ra7 22.Bd4 c5–/+) 21...Rb7 22.g4 (22.Qh2 Bd6 23.e5 Be7–+) 22...Rba7 (22...hg4 23.fg4 de4 24.de4=+) 23.g5 Ra4 0–1. segovia (2460) – michaelbuss (2860), ChessWorld.net, 2009.

4.Bb2 e6 5.Nc3 f6 (5...Bb4 6.g4 Bc3 7.Bc3–/+) 6.Nf3 (6.Nd3 Bd3 7.ed3 Bb4 8.Qh5 g6–/+) 6...Bb4 7.a3 Ba5 (7...Bc5 8.e3–/+) 8.Nd4 Bg6 (8...Ne7!?–/+) 9.Ne6= Qe7 (9...Qd6 10.Ng7 Kf7 11.e4 Bc3 12.Bc3 Kg7 13.Rb1–+) 10.Nd4 (10.Nf4 c6 11.Ng6 hg6 12.Rb1=) 10...Nd7 (10...c6 11.e3=) 11.e3 (11.Nd5 Qd6 12.c4 Ne7+/–) 11...a6? (11...Bc3 12.Bc3 c5 13.Ne2=) 12.Be2 (12.Nd5 Qe4 13.Nf4 0-0-0+/–) 12...Nh6 13.0-0 0-0 14.Nd5+/– Qd6 15.Nc3 c5 16.Nf3 Bc3 17.Bc3 b5 18.d4 c4? 19.Re1 Be4? 20.Nd2 Bb7? 21.Bb4+– Qc6 22.Bf3 Qc7 23.Bb7 Qb7 24.Nf3?? Rfe8+/– 25.d5 a5 26.Bc3 Nb6 27.d6 Nd5 28.Bd4 Rad8 29.Bc5 Qc6= 30.e4 Qc5 31.Qd5= Qd5 32.ed5 Re1 33.Re1 Rd6 34.Rd1 Nf5 35.c3 Ne7 36.Re1? Kf7 37.Nd4=+ Rd5 38.f4? b4!–+ 39.ab4 ab4 40.Ne2 b3 41.Nd4 f5 42.h3 Nc8 43.g4 g6 44.g5 Nd6 45.h4 Ne4 46.Rb1? Nc3 47.Rb2 Rd4 48.Kg2 Rf4 49.Kh3 Ke6 50.Rd2 Nd5 51.Re2 Re4 52.Rb2 c3 53.Rb3 c2 (54.Kg2 c1Q–+) 0–1. gdraper (1715) – cindya, net–chess.com, 2006.

4.Bb2 e6 5.g4 Be4 6.Rg1 Bb4 7.a3 Bd6 8.Nf3 Bf3 9.ef3 Kf8 10.g5 (10.Rh1 Nf6–/+) 10...Bh2–+ 11.Rg4 Ne7 12.Nc3 Ng6 13.d4 c5! 14.dc5 Nd7 15.Bc1 Rc8 16.Na4 Nc5 17.Rb1 b6 18.Nc5 Rc5 19.Be3 Rc3 20.Bd2 Rc7 21.c4 Bd6 22.cd5 ed5 23.Rb3 f5 24.Rg1 Bh2 (24...Bh2 25.Rh1 Bf4–+) 0–1. bicycle – michaelbuss, ChessWorld.net, 2007.

4.Bb2 Nf6 5.e3 =.

4.d3 Qd6 5.Nf3 Nf6 6.Nbd2 Qb6 (6...e5 7.c4+=) 7.c4 e6 8.a3 Nc6 (8...c5 9.d4 cb4 10.c5=) 9.c5 Qa6 10.e4 Bg4 11.d4 b5 12.cb6 Qb6 13.Qa4 Ke7 14.e5 Ne4 15.Ne4 de4 16.Bg5 f6 17.Rc1 Nd4 18.Nd4 fg5 19.Nb5 a6 (19...c6!? 20.Nd6 e3+/–) 20.Nc7+– Rd8 21.Ba6 Qd4+/– 22.0-0 Qe5 23.h3 Kf6 24.f4 gf4 25.hg4 Bd6 26.Qc6 Kg5 27.Qc3 Qc3 28.Rc3 Kf6 29.Rc6 Rd7 30.Nb5 Be5 31.Bc8 Re7 32.a4 h5 33.g5! Kg5 34.a5 Rd8 35.a6 Rd5 36.Rc5 1–0. winugly123 – marekt, ChessWorld.net, 2009.

4.d4 e6 5.a3 Bd6 6.Bb2 Ne7 7.e3 0-0 8.g4 Be4 9.f3 Bg6 10.h4 f6 11.Ng6 Ng6 (worse is 11...hg6 12.h5+=) 12.f4 Nd7 13.c4 c6 14.c5 Bc7 15.Nd2 a5 16.Nf3 e5 17.de5 fe5 18.f5 Ne7 19.Ng5 Qc8 20.Ne6 Rf7 21.Bh3 Nf8 22.Ng5 Rf6 23.Qb3 h5 (23...ab4!? 24.Ne4 Rh6=) 24.e4 ab4 25.ab4 (25.Qb4?? Ba5 26.Be5 Rh6–+) 25...Ra1 26.Ba1 hg4 27.Bg4 Kh8 28.h5 Nh7 29.Nf3 Qb8 (29...de4? 30.Ne5 Be5 31.Be5+–) 30.Nh4 Rh6 (30...de4?? 31.Ng6 Ng6 32.hg6+– (worse is 32.fg6 Ng5+=)) 31.Ng6 Ng6 32.fg6 Nf6 33.Bf5 Qf8 34.Bb2 Nh5 (34...Ne4 35.Be4 de4 36.Qf7+–) 35.Qf3 Nf4?? (better is 35...de4 36.Qe4 Qe8+/–) 36.Rh6+– gh6 37.Qf4 Qg7 38.Qh4 (38.Qh4 de4 39.Bc1+–) 1–0. Shensnovich,V (2170) – Loukachouk,A (2295), RUS–ch sf Tula, 2003. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bf5)

4.d4 e6 5.a3 Nd7 6.Nd7 Qd7 7.Nd2 Qa4 8.Nb3 Nf6 9.e3 Be7 10.Bb2 0-0 11.Be2 b6 12.0-0 a5 13.c3 Rfb8 14.Nd2 Qd1 15.Rfd1 c5 16.b5 cd4 17.cd4 Rc8 18.Rdc1 Ne8 19.f3 ½–½. Galego,L (2495) – Korneev,O (2575), Matosinhos POR, Div, 2012. (=1.Nf3 d5 2.b4 Bg4 3.Ne5)

4.d4 e6 5.c3 Bd6 6.Qa4 c6 7.Nf3 (7.g4 Be4 8.f3 Bb1 9.Rb1 Be5 10.de5 b5+=) 7...Nd7 8.g3 (8.Nbd2 e5–/+) 8...a5 9.ba5 Ra5 10.Qd1 Qa8 11.a3 Ngf6 12.Nfd2 (12.Nbd2 Ba3 13.Nh4 Bc1 14.Rc1 Ra2–/+) 12...0-0 (12...b5 13.Bg2–/+) 13.Bg2 (13.c4 b5 14.Nb3 Ra7–/+) 13...b5 14.0-0 e5 (14...Re8 15.Re1–/+) 15.f3 (15.Nb3 Ra4–+) 15...Ra4–+ 16.e4 (16.Bb2 Qa7–+) 16...de4 17.fe4 Bg4 18.Bf3 (18.Qc2 ed4 19.cd4 Rd4 20.Nc3–+) 18...Be6 (18...Bf3!? 19.Nf3 Ne4–+) 19.Bb2–/+ Bh3 (19...Qa7 20.Kg2–/+) 20.Rf2 c5 21.d5 (better is 21.Qe2!?–/+) 21...c4–+ 22.Bg2 Bg4 23.Qe1 Nc5 24.Bf1 Qa7 25.Bc1 Bh5 26.Kg2 Bg6 27.Rf6 gf6 28.g4 Kg7 29.Qe3 Ne4 30.Qa7 Ra7 31.a4 Rfa8 0–1. hasant (1915) – pierred (2595), net–chess.com, 2008.

4.e3 Qd6 5.Nd3 =+.

4.e3 Qd6 5.d4 Nc6 6.Nc6 Qc6 7.Bd3 Bd3 8.Qd3 e6 9.b5 Qd7 10.Ba3 Nf6 11.Bf8 Rf8 12.Nd2 0-0-0 13.0-0-0 Qd6 14.c4 dc4 15.Nc4 Qd5 16.f3 Ne8 17.a4 Nd6 18.Nd6 Rd6 19.Rd2 ½–½. Pommerel – Buss, corr 3AMM½–01 1997.

4.e3 Qd6 5.f4 +=.

4.e3 e6 5.a3 Bd6+= 6.Bb2 f6 (6...Nf6!?+=) 7.Nf3= Ne7 (7...Nd7 8.Nd4+=) 8.c4+= c5 9.bc5 (9.Nh4 cb4 10.cd5 0-0=) 9...Bc5= 10.Nd4 (10.Nc3 Nbc6+=) 10...0-0 (better is 10...Bd4 11.Bd4 Nbc6–/+) 11.Nf5+= Nf5 12.d4 (12.cd5 Qd5 13.Nc3 Qd7+=) 12...Bb6 13.Bd3 Ba5 14.Nd2 Ne7 (14...Qd7 15.cd5 ed5 16.0-0+=) 15.0-0+/– Kh8 (15...Nbc6 16.Rc1+/–) 16.Nb3 Bb6 17.a4 Nbc6 18.Ba3 1–0. Gasanov,Engels G – Esen,C. Selcuk, 12th AfroAsia Zonal Champs Prelim Group, 2009.

4.e3 e6 5.Bb2 f6 6.Nd3 e5 7.Be2 Nh6 8.a3 Bd6 9.Nc5 Bc5 10.bc5 Nc6 11.d4 Qd7 12.0-0 Rd8 13.Re1 0-0 14.c4 ed4 15.ed4 dc4 16.Bc4 Nf7 17.Bb5 Qd5 18.Bc6 Qc6 19.Nd2 Rfe8 20.Qf3 Qf3 21.Nf3 Kf8 22.Bc3 c6 23.a4 Be4 24.Re3 Bf3 25.gf3 Ng5 26.Rb1 Rd7 27.f4 Re3 28.fe3 Ne4 29.Be1 f5 30.a5 Ke7 31.Ra1 Ke6 32.Kf1 h6 33.h4 a6 34.Ke2 g6 35.Rb1 Kd5 36.Kd3 ½–½. Kazimierski,Tomasz – Moorman,Robert_Jan, IECG, 1999.

4.e3 e6 5.Bb5 c6 6.Ba4 Bb4 7.0-0 Nf6 8.c3 Bd6 9.d4 Nbd7 10.f4 Ne4 11.g3 Ne5 12.fe5 Be7 13.Qe2 Qa5 14.g4 Bg4 15.Qg4 Qa4 16.Qg7 0-0-0 17.Nd2 Rhg8 18.Qg8 Rg8 (19.Kh1 Qd1 20.h3 Ng3 21.Kg1 Nf1 22.Kh1 Nd2 23.Kh2 Nf3#) 0–1. Ecija,Agustin – Gandolfi,Flavio, UECC, 1999.

4.e3 f6 5.Bd3 Bd3 6.Nd3 e5 7.0-0 Bd6 8.Nc3 c6 9.e4 Ne7 10.Kh1 0-0 11.f4 Nd7 12.f5 a5 13.b5 Rc8 14.bc6 bc6 15.ed5 cd5 16.Nb5 Bb8 17.a4 Nb6 18.Ba3 Rf7 19.Nc5 Qe8 20.Na6 Qd7 21.Nb8 Rb8 22.Nd6 Rff8 23.d3 Nec8 24.c4 Nd6–+ 25.c5 Nf5 26.cb6 Ne3 27.Qe2 Nf1 28.Bf8 Kf8 29.Rf1 Rb6 30.Qe5 Rb1!! 31.Qe2 Rf1 32.Qf1 Qa4 33.h3 Qd7 34.Qf4 a4 35.Qb4 Kf7 36.h4 h5 37.Qa5 Kg6 38.Qc5 Qg4 0–1. Pechy,A (2185) – Borgo,G (2410), 31st Crespi Memorial, 2010.

4.e3 f6 5.Nf3 e5 6.c4 c6 7.Qb3 Na6 8.Ba3 Nc7 9.Nc3 Be6 10.Rc1 Bd6 11.d4 e4 12.Nd2 f5 13.b5 Ba3 14.Qa3 Ne7 15.bc6 bc6 16.Nb3 0-0 17.cd5 cd5 18.g3 Rf6 19.Be2 Rh6 20.Kd2 Bf7 21.Nc5 f4 22.gf4+/– Nf5 23.Qa5 Qe7 24.Rb1 Ne8 25.Rb7 Qh4 26.Rf7! Kf7 27.N5e4! Qd8 28.Ng5 Kg8 29.Qd5 Qd5 30.Nd5 Rb8 31.Bc4 Kf8 32.Bb3 a5 33.Kd3 Ne7 34.Nc3 Nc6 35.Nce4 Nb4 36.Ke2 Na2 37.Nc5 a4 38.Ba4 Rb2 39.Kf3 Nc7 40.Nd3 Rd2 41.Ne5 Nc3 42.Rc1 N7d5 43.Bb3 Rh2 44.Ng4 Rh4 45.Ra1 h5? 46.Ra8 Ke7 47.Ra7 Ke8 48.Ne5 Rh2 49.Ne4 Rh3 50.Kg2 Ne4 51.Bd5 Rg3= 52.Kh2 Rf2 53.Kh1 Rf1 54.Kh2 Rf2 55.Kh1 Rh3 56.Kg1 Rg3 57.Kh1 Rh3 58.Kg1 Rg3 59.Kh1 ½–½. Bosboom,M (2395) – Haslinger,S (2545), Haarlem NED, BDO GM, 2011.

4.e3 f6 5.Nf3 e5 6.Nh4 Be6 7.Be2 (7.a3 g5 8.Nf3 g4+=) 7...Bb4+= 8.c3 (8.a3 Ba5+=) 8...Bd6–/+ 9.Bh5 (9.Na3!?–/+) 9...g6–+ 10.Be2 Nd7 11.0-0 e4 (better is 11...Ne7–+) 12.a4? (better is 12.f4–+) 12...g5 13.Bh5 (13.Bg4 Bg4 (13...gh4 14.Be6 h5 15.c4=) 14.Qg4 gh4 15.Qh5 Kf8 16.Qd5 h3–+) 13...Kf8 14.Bg4 (14.f4 gh4 15.f5 Bf7 16.Bf7 Kf7 17.Qh5 Kg7 18.Qg4 Kf8–+) 14...Bg4 (14...gh4?! 15.Be6 Nc5 16.Bh3+=) 15.Qg4 gh4 (15...Ne5!? 16.Qe6 gh4 17.Qd5–+) 16.Qh4 Ne5 17.d4 ed3 18.Ba3 h5 19.f4 Ng4 20.Rf3 Ba3 21.Na3 Qe7 22.h3 Ne3 23.Qf2 Re8 24.Qd2 Nc4 25.Nc4 dc4 26.Qa2 Qc5 27.Kh2 Re2 28.Qb1 Ne7 29.Qb7 Rg8 30.Qa8 Kf7 (30...Kf7 31.Qg8 Ng8–+) 0–1. queensservant (1770) – terrier (2105), gameknot.com, 2014.

4.e3 f6 5.Nf3 e6 6.Bb5 c6 7.Ba4 Bb4 8.c3 Bc5 9.d4 Bd6 10.h3 e5 11.Nfd2 Nd7 12.Na3 Qa5 13.g4?? (better is 13.Nab1–+) 13...Qc3 14.gf5 Qa1 (14...Ba3?! 15.Ba3 Qa3 16.de5 Ne5 17.Bc2–+) 15.Qc2 (15.Rg1 ed4 16.Nc2 Qa2 17.Qh5 Kd8–+) 15...ed4 16.ed4 (16.Nb3 Qc3 17.Qc3 dc3–+) 16...Ba3 17.Ke2 Bc1 18.Rc1 (18.Nf3 Qb2 19.Rc1 Qa3–+) 18...Qd4 19.Nf3 Qf4 20.Qb2 (20.Rb1 Rb8–+) 20...Qa4 21.Ra1 Qe4 22.Kf1 Qf3 23.Qb7 Rb8 24.Qa7 Qh1 25.Ke2 Rb2 26.Kd3 Qe4 27.Kc3 Qb4 28.Kd3 Qd2 0–1. Pekin Dragons – marekt, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bf5)

4.f4 e6 5.a3 Bd6 6.Bb2 f6 7.Nf3 Bf4 (7...Ne7 8.e3+=) 8.e3= Bd6 9.c4 c6 (9...Nc6 10.Nc3=) 10.c5 (10.Nd4 Ne7 11.Nc3 Be5+=) 10...Bc7 11.Nd4 Ne7 12.Nc3 Be5 13.Nf5 (13.Qh5 Bg6 14.Qh3 Bd4 15.ed4 e5+=) 13...Nf5+= 14.Bd3 Nh6 (14...d4!? 15.ed4 Qd4–/+) 15.Qh5 Nf7 16.Bc2 (16.0-0 Nd7+=) 16...f5 17.0-0 (17.d4 Bc7=) 17...Nd7+= 18.d4 Nf6 19.Qh4 Bb8 20.Rf3 (20.g3 h5 21.Bd1 Qc7–/+) 20...0-0–/+ 21.Rh3 (better is 21.h3!?–/+) 21...g5–+ 22.Qe1 g4 23.Rh4 Nh8 24.Ne2 (24.Rh6 Ng6–+) 24...Ng6 25.Rh6 (25.Rd1 Nh4 26.Qh4 Ne4–+) 25...Kg7 26.Rg6 hg6 (worse is 26...Kg6 27.Nf4 Bf4 28.ef4–+) 27.Nf4 Qe7 28.Nd3 (28.Qh4 Bf4 29.ef4 Rh8–+) 28...Rh8 29.Ne5 Bc7 0–1. Vlasov,Andrey – Grego,Luis Jose‚ Gonzaga (1935), ICCF FM/0815, 2008.

4.f4 e6 5.a3 Bd6 6.d4 Be5 7.de5 f6 8.Bb2 fe5 9.Be5 Nf6 10.Nd2 0-0 11.e3 Nc6 12.Bb2 Ng4 13.Qe2 e5 14.b5 Ne7 15.fe5 Ng6 16.Nf3 Qe7 17.Qd2 Be4 18.Be2 N4e5 19.0-0 Nf3 20.Bf3 Bf3 21.Rf3 Rf3 22.gf3 Rd8 23.Qc3 Nh4 24.Kf2 Rf8 25.f4 c6 26.bc6 bc6 27.Re1 Ng6 28.Rg1 c5 29.Rg3 Rf7 30.Qb3 Qe4 31.Kg1 d4 32.Qb8 ½–½. Waite,Daniel J – Panuzzo,John, CServe email, 1994. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bf5)

4.f4 e6 5.a3 Bd6 6.d4 Be5 7.de5 f6 8.Bb2 fe5 9.Be5 Nf6 10.e3 Nbd7 11.Bd4 Ne4 12.Qh5 Bg6 13.Qg4 Qe7 14.Bd3 0-0 15.0-0 c5 16.bc5 e5 17.fe5 Ne5 18.Qd1 Nd3 19.cd3 Rf1 20.Qf1 Rf8 21.Qe1 Nc5 22.Nd2 Bd3 23.a4 h6 24.a5 a6 25.Bb2 Rc8 26.Rc1 Rc6 27.Nf3 Be4 28.Ne5 Rc7 29.Qg3 Na4 30.Rc7 Qc7 31.Bd4 Qc1 32.Kf2 Qc2 33.Kf1 Nc3 34.Qg4 Qc1 35.Kf2 Qd2 36.Kf1 Bd3 37.Nd3 Qd3 38.Ke1 Qb1 39.Kf2 Ne4 0–1. Kremenietsky – Vasiukov, Moscow 1972.

4.g4 Be6 5.Nc3 f6 6.d4 fe5 7.de5 Qd7 8.Bg2 Nc6 9.Bd5 Nb4 10.Bb7 Qd1 11.Nd1 Rb8 12.Be4 Bg4 13.f3 Be6 14.Rb1 Ba2 15.Rb2 Nc2 16.Rc2 e6 17.Rc7 Bb4 18.Bd2 Bd2 19.Kd2 Ne7 20.Rg1 g6 21.Ra7 Bd5 22.Nc3 Be4 23.Ne4 Rb2 24.Ke3 Nf5 25.Kf4 0-0 26.Nf6 Rf6 27.ef6 Rb4 28.e4 Nd4 29.f7 Kf8 30.Rd1 Rc4 31.Kg5 Nf3 32.Kf6 Nd4 33.Ra8 1–0. Cavanagh,Philip – NN, Yahoo! Chess, 2001.

4.g4 Be6 5.e3 Qd6 6.Nd3 Nc6 =.

4.g4 Be6 5.Bg2 Qd6 6.Bb2 Qb4 7.Bc3 Qd6 8.e4?? (better is 8.h3–/+) 8...d4–+ 9.Bb2 (9.f4 dc3 10.Nc3–+) 9...Qe5 10.d3 Nf6 11.h3 Nc6 12.0-0 (12.c3 0-0-0–+) 12...h5 13.f4 Qb5 14.Ba3 hg4 15.f5 gh3 16.Bf3 h2 17.Kh1 Bd7 18.Rf2 Qe5 19.Nd2 Qg3 20.Rg2 Qf4 21.Bc1 Ne5 22.Nf1 Qf3 23.Qf3 Nf3 24.Bf4 g5! 25.Bh2 g4 26.Nd2 e6 27.Nf3 gf3 28.Rf2 Ng4 29.Rf3 Nh2 30.Kg2 ef5 31.ef5 Bc6 32.Rh1 Bd6 33.Kf2 Bf3 34.Re1 Kd7 35.f6 Rag8 36.Rg1 Re8 37.Re1 Rhg8 38.Re8 Ke8 39.c3 Bg3 40.Kg1 dc3 41.d4 c2 42.a3 c1Q# 0–1. cogit – hyrybyry, kurnik, 2012.

5.Nf3 e5 6.a3 a5 7.c3 Bd6 8.e3 Ne7 9.Qa4 (9.Be2 0-0+=) 9...Nd7–/+ 10.h3? (better is 10.Qb3–/+) 10...Bb1–+ 11.Rb1 ab4 12.Qb3 ba3 13.Bc1 c6 14.Ra1 Qb6 15.Qb6 Nb6 16.Ra2 Ng6 17.d3 Na4 18.Bd2 0-0 19.Be2 Nc5 Black prepares the advance e4 20.Bc1 e4 21.de4 Ne4 (21...de4?! 22.Nd2–+) 22.Bd2 b5 23.Nd4 Ra6 24.Bd3 Ne5 25.Be4 de4 26.0-0 Rb8 27.Nf5 Bc7 28.Nd4 c5 29.Ne6 (29.Nb3 Nd3 30.f3–+) 29...Re6 30.Ra3 Nc4 31.Ra2 b4 32.cb4 cb4 33.Rc2 Rc6 34.Rfc1 (34.Bb4 Rb4 35.Rfc1 f5–+) 34...b3 35.Rc4 Rc4 36.Rb1 (36.Rc4 b2 37.Rc7 b1Q 38.Bc1–+) 36...b2 37.f3 ef3 38.gf3 Rc2 0–1. raymac – marekt, ChessWorld.net, 2012. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bf5)

5.Nf3 e5 6.a3 Bd6 7.e3 Ne7 8.c4 c6 9.Nc3 0-0 10.Qb3 dc4 11.Bc4 Kh8 12.Nh4 Nd7 (12...Bc8!?=) 13.Nf5+= Nf5 14.Be6 Nh6 15.Ne4 Qe7 16.Nd6 Qd6 17.0-0 Rae8 (17...Qd2?? 18.Rfd1 Qe2 19.Rd7+–) 18.Bd7 Qd7 19.Rad1 Rd8 20.d4 e4 21.Rc1 Qd5 22.Qd5 Rd5 23.Rc5 Rfd8 24.Rd5 Rd5 25.f3 ef3 26.gf3 Rg5 27.Kf2 Rh5 28.Rh1 Kg8 29.e4 Kf7 30.Bc1 Ng8 31.Kg3 a5 32.Bd2 ab4 33.ab4 Rb5 34.Ra1 Rb6 35.Ra7 Ne7 36.Kf2 Ke6 37.Ra8 Ra6 38.Ra6 ba6 39.Ke3 Nc8 40.Kd3 Nb6 41.Be3 Kd7 42.h4 h5 43.d5 Nc8 44.Kd4 (44.dc6!? Kc6 45.Bc5+=) 44...Ne7= 45.Bf2 g5 46.hg5 fg5 47.Be3 cd5 48.Bg5 de4 49.fe4 Ng6 50.Kc5 Kc7 51.e5 h4 (51...Ne5? 52.Bf4+–) 52.Bh4 Nh4 53.b5 ab5 54.Kb5 ½–½. Beyer,Dietmar – Hanisch,Bernd (2160), NRW Class2, 2008. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bf5)

5.Nf3 e5 6.b5 a6 7.a4 Bd6 8.e3 Ne7 9.c4 ab5 10.ab5 Ra1 11.Ba1 c5 12.cd5 Nd5 13.Nc3 Nb4 14.d3 Bc7 15.e4 Bg4 16.Be2 Bf3 17.gf3 0-0 18.Rg1 Kh8 19.Bb2 Nd7 20.Na4 Qe7 21.Bc1 Ra8 22.Qb3 Nf8 23.b6 Bd6 24.d4 ed4–+ 0–1. giving up claim a win – Tihomir Glowatzky, ChessWorld.net, 2005.

5.Nf3 e5 6.Nh4 Be6 7.a3 c5 8.e4 (8.bc5 Bc5 9.e3 Nc6=+) 8...cb4 9.ed5 (9.ab4 de4 (9...Bb4 10.Bb5 Nc6 11.Qh5 g6 12.Qe2–+) 10.Bb5 Nc6–+) 9...Bd5 (9...Qd5 10.Be2–/+) 10.ab4=+ Bb4 11.Nc3 (11.Bb5 Nc6 12.Qg4 Bf8=+) 11...Bf7 (11...Bc3 12.Bc3 Ne7 13.Qh5 Bf7 14.Qg4–/+) 12.Nf5 (better 12.Qg4 Bf8 13.Bb5 Nc6 14.Ba3=+) 12...Nc6 (better 12...g6!? 13.Ne3 Nc6=+) 13.Ng7= Kf8 14.Qg4?? (14.Nf5 Nge7 15.Ne3 Rg8+=) 14...Nh6?? (better 14...h5 15.Qg3 h4–+) 15.Qg3?? (better 15.Ne6 Ke7 16.Nd8 Ng4 17.Nb7=) 15...Rg8–+ 16.Qh3 (16.Bd3 Bc5–+) 16...Kg7 (16...Rg7?! 17.Qh6 Bg6 18.d3=+) 17.Bd3 Bg6 (better 17...Qc8 18.Qe3–+) 18.Ne4 (18.Bg6 hg6 19.Qf3 Nf5–+) 18...Nf5 (18...Be4 19.Be4 Qd2 20.Kf1–+) 19.0-0-0 (19.c3 Be7–+) 19...Rc8 (19...Nfd4 20.Rde1–+) 20.Nc3 (20.Rhe1 Bf8 21.Kb1 Nb4–+) 20...Nfd4 21.Bg6 hg6 22.Rhe1 (22.Rde1 Bf8 23.Kb1 Nb4–+) 22...Qa5 (22...Rh8 23.Qg3–+) 23.Qd7 (23.f4 Rgd8–+) 23...Ne7 24.Nd5 (24.Kb1–+) 24...Rgd8 (24...Rc2 25.Kb1 Rb2 26.Kb2 Qa3 27.Kb1 Qb3 28.Ka1 Nc2) 25.Qb7 (25.Qc8 Rc8 26.Nc3–+) 25...Rc2 26.Kb1 Rb2! (26...Rb2 27.Kb2 Qa3 28.Kb1 Qb3 29.Ka1 Nc2) 0–1. mic – mpenga, net–chess.com, 2017.

5.Nf3 e6 6.a3 e5 (6...Nh6 7.c4=) 7.e3 c6 8.Be2+= Bd6 9.c4 Ne7 10.d4 e4 11.Nfd2 Be6 12.Nc3 0-0 13.Qb3 f5 14.g3 Nd7 15.a4 Nf6 16.c5 Bc7 17.0-0-0? (better is 17.0-0=) 17...b6–/+ 18.Kb1 (18.b5 Rb8–/+) 18...Bf7 (18...bc5 19.dc5 Rb8–/+) 19.f3 (better is 19.cb6!? ab6 20.h3–/+) 19...bc5–+ 20.bc5 Qd7 21.Kc2 (21.Rde1 Rfb8 22.Qc2 a5–+) 21...Rab8 22.Qa3 Bg6 (22...ef3 23.Nf3 Ng4 24.Rd3–+) 23.f4 Ng4 24.Nf1 (24.Na2 Nf2–+) 24...Nf2 25.Nd2 Qe8 26.Ba6 (26.Rhg1 Bh5 27.Rdf1 Be2 28.Ne2 Nd3–+) 26...Bh5 27.Rde1 Nh1 28.Rh1 Bg4 0–1. roy1nc6 (1985) – marekt (2070), gameknot.com, 2014.

5.Nf3 Nh6 6.h3 (6.a3 e5+=) 6...e5 7.a3 c5 8.bc5 Bc5 9.d4 Qb6 10.dc5 (better is 10.Ra2!? ed4 11.Bd4 Bd4 12.Nd4+=) 10...Qb2–/+ 11.Nbd2 Nd7 12.Qb1 (12.g4 Bg6–/+) 12...Qb1 (12...Qc3 13.Ra2–+) 13.Rb1 Nc5 14.Rb2 0-0 (14...0-0-0 15.c4–+) 15.e3–/+ Nf7 16.Rb5 b6 17.Kd1 (17.c4 Nd6 18.Rb2 Rfc8–+) 17...Rac8 18.Ne1 (18.c4 Nd6 19.Rb4 Rfd8 20.cd5 Nde4–+) 18...Nd6 19.Rb4 Bd7 (19...Nce4 20.Ne4 Ne4 21.Nd3–+) 20.f3 (20.Nd3 Na4–+) 20...Na4 (20...Nf5 21.e4 Ne3 22.Kc1–+) 21.Nb1 (21.Kc1 Nc3 22.Ba6 Rc7–+) 21...a5 (21...Nc4 22.Rb3–+) 22.Rb3 b5 0–1. Alonso,Jose – Mann,Derek, IECC, 1997. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bf5)

5.Bb2 Ne5=+ 6.Be5 e6 (6...f6 7.Bc3=+) 7.a3= Nf6 8.d4 a5 (8...Bd6 9.Bd3 Be5 10.de5=) 9.b5 Bd6 10.Bd6 Qd6 11.c4 dc4 12.Bc4 c5 13.bc6 Qc6 14.Bf1 (14.Be2 Bc2 15.Bf3 Bd1 16.Bc6 bc6 17.Kd1 c5 18.dc5 Rc8=) 14...0-0 (14...e5 15.de5 Rd8 16.Nd2+=) 15.Nd2 Rac8 (15...Rfc8 16.Be2=+) 16.Qb3 Rfd8 (16...Rc7 17.f3=+) 17.Qc4 (17.Nc4 a4 18.Qb6 Nd5 19.Qc6 Rc6=) 17...Qd6 (17...b6 18.Qc6 Rc6 19.Bb5=+) 18.Qb5= Qd5 19.Qd5 ed5 (< 19...Nd5 20.e4 Nc3 21.ef5 ef5 22.f3 Rd4 23.Nb3+=) 20.Bb5 Rc3 (20...Rc2 21.f3=) 21.0-0 (21...Rdc8 22.Ra2=+; 21.Ke2 Rdc8=). Tihomir_Glowatzky – Subedei, ChessWorld.net, 2005.

5.Bb2 Ne5 6.Be5 f6 7.Bg3 e5 8.a3 a5 9.Nc3 ab4 10.ab4 Ra1 11.Qa1 Bc2 12.Qa2 Bg6 13.Qa7 Qc8 14.Nd5 Bd6 15.f4 Ne7 16.fe5 fe5 17.Ne7 Ke7 18.Bh4 Kd7 19.Qa4 c6 20.b5 Qa8 21.bc6 bc6 22.Qg4 Kc7 23.Bc4 (better is 23.Be2=) 23...Qa1–/+ 24.Qd1 Qd1 25.Kd1 Ra8 26.Be1 Ra4 27.Bb3 Ra3 28.Bc4 Kb6 29.Ke2 Kc5 30.Be6 Bd3 31.Kf2 Ra8 32.Kg3 Kb5 33.h4 e4 34.Kh3 Bb4 35.h5 Ra1 36.Kh2 h6 37.Rg1 c5 38.Bh4 Rg1 39.Kg1 Bd2 40.Kf2 c4 0–1. antinephilehi (2150) – luleerik (1995), gameknot.com, 2010.

5.Bb2 e6 6.b5 Ngf6 7.c4 Ne5 8.Be5 dc4 9.Bc4 Bd6 10.Bd6 Qd6 11.0-0 0-0-0 12.f3 h5 13.Rf2 h4 14.d4 e5 15.Rd2 Be6 16.Be6 Qe6 17.Nc3? (better is 17.Kh1+=) 17...ed4–+ 18.Rd4?? (18.Ne4 de3 19.Rd8 Rd8 20.Qf1 Ne4 21.fe4–+) 18…Qe3 (18...Qe3 19.Kh1 Rd4–+) 0–1. cmulligan (2230) – pierred (2790), net–chess.com, 2011.

5.Bb2 e6 6.Nd7 Qd7 7.Be2 Nf6 (7...Bb4?? 8.Bg7 Qa4 9.c3 Qd1 10.Kd1+-) 8.0-0 (8.a3!?=+) 8...Bb4-/+ 9.g4 Bg6 10.g5 Ne4 11.d3 Nd6 12.Bg7 Rg8 13.Bf6 Nf5 (13...h6 14.Kh1-/+) 14.e4=+ Nh4 15.Qc1 Be7 16.Be7 Qe7 (worse 16...Ke7 17.Qf4 Qc6 18.Nd2+- (18.Qh4?! Qc2 19.Re1 Qb2=)) 17.Qf4 Bh5! 18.Bh5 Rg5 (18...Rg5 19.Kh1 Rh5 20.ed5 Rd5-/+) 0-1. vishm (2295) - marekt (2175), gameknot.com, 2015.

5.d4 e6 6.Bd3 (6.a3!?+=) 6...Bb4–/+ 7.c3 Bd6 8.Bf5 ef5 9.Nd7 Qd7 10.Bb2 Nf6 11.f3 (11.Ba3!?–/+) 11...0-0–+ 12.0-0 Rfe8 13.Qd2 Re6 14.Qf2 Rae8 15.Re1 (15.Bc1 Qa4–+) 15...f4 16.e4 de4 17.fe4 (17.Ba3–+) 17...Ne4 18.Qf3 (18.Re4 Re4 19.Nd2–+) 18...Ng5 19.Re6 Nf3 (19...fe6?! 20.Qb7 e5 21.Nd2–/+) 20.gf3 Qe6 21.Nd2 Qe3 22.Kg2 Qd2 23.Kh3 Qe2 24.Rb1 (24.Rg1 Qf3 25.Rg3 fg3 26.Bc1 gh2 27.Kh4 h1Q 28.Kg5 h6) 24...Qf3 25.Kh4 Be7 0–1. themuttsknutts – marekt, ChessWorld.net, 2013. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bf5)

5.Nd7 Qd7 6.Bb2 Nf6 =.

5.f3 e6 6.Bg2 Nd7 7.Nd7 (worse is 7.fe4 Qh4 8.Kf1 Ne5–+) 7...Qh4 8.Kf1 Kd7 9.d4 Bg6 10.c4 h5 (10...dc4 11.Na3 c3 12.Qa4 Kc8 13.Nb5=) 11.cd5+= ed5 12.g5 c6 13.b5 Bb4 14.Be3 Ne7 15.Qc1 f6 (15...cb5? 16.Bf2 Rac8 17.Qc8 (17.Bh4?? Rc1 18.Kf2 Rh1 19.Bh1 Rc8–+) 17...Rc8 18.Bh4 Rc1 19.Kf2 Rh1 20.Bh1+–) 16.gf6 Qf6 17.bc6 Qc6 18.Qb2 Bd6 (18...a5 19.a3 Bd6 20.Nc3+=) 19.Bd2 (19.Nc3 h4 20.Bh3 Bf5+=) 19...h4 20.Bh3 Bf5 21.Bf5 Nf5 22.Nc3 Nd4 23.Rg1= Be5 24.Qb4?? a5 25.Qb1 Rae8 26.Qd3–/+ Qc4 27.Qc4 dc4 28.Rd1 Ke6 29.Ne4 b5 30.Bc3= Rd8 31.Rg6 Kf7 32.Ra6 Rh5 33.Ra7 Kf8 34.Ra5 Ke8 35.Ra6 Nc2 36.Rd8 Kd8 37.Be5 Re5 38.Kf2 h3 39.Ra5 Kc7 40.Ra7 Kc6 41.Ra6 Kd7 42.Rg6 b4 43.Rg7 Kc6 44.Rg6 Kb5 45.Rg8 c3 46.Rc8 Re6 47.a4 ba3 48.Nc3 Ka5 49.f4 Rh6 50.f5+= Kb4 51.Na2 Kb3 52.Nc1 Kb2 ½–½. samurai – marekt, ChessWorld.net, 2011.

5.f3 e6 6.h4 Be7 7.g5 Bf5 +=.

5.Rg1 Qd6 6.Bb2 Qb4 7.Qc1 f6 8.Nd3 Bd3 9.cd3 Qd6 10.Nc3 Nc6 11.Nb5 Qd7 (11...Qh2?? 12.Rg2 Qh6 13.Nc7 Kf7 14.Na8+-) 12.g5 e5 13.Rb1 0-1. jon_lord (2215) - original_sin (2305), League division A2, lichess.org, 2022.

5.Rg1 Qd6 6.Bb2 Qb4 7.Bc3 Qb6 (7...Qd6 8.d3 Bg6 9.Nd2–/+) 8.d3+= Bg6 9.h4 (9.Bg2 e6–/+) 9...f6 10.h5 (better is 10.Ng6!? hg6 11.d4–/+) 10...fe5–+ 11.hg6 d4 (11...Qg6?! 12.Be5 c6 13.d4+=) 12.Rh1 Qg6 (12...h6 13.Bg2 c6 14.e3–+) 13.Bg2 (13.Bb2 Qg4 14.c3 Nc6–+) 13...Nc6 (13...dc3?! 14.Bb7 Qb6 15.Ba8+=) 14.Bb2 Qg4 15.Kf1 (15.Bh3 Qg6–+) 15...h5 (15...e6 16.c3 Nge7 17.Qb3–+) 16.Nd2 (16.c3 Qd7–+) 16...h4 17.Bh3 (17.Bc6 bc6 18.e3 Qd7–+) 17...Qf4 18.Ne4 Qf7 19.c3 (19.c4 Nd8–+) 19...Nf6 20.Nc5? (better is 20.Ng5 Qd5 21.Bg2–+) 20…Qd5 (20...Qd5 21.Ne4 Ne4 22.de4 Qe4–+) 0–1. thotares (1625) – faramir (1775), internet, 2007.

4.Bb2 Nd7 5.d4 e6 6.a3 Ngf6 7.Nd2 Bd6 (7...a5 8.ba5 Ra5 9.c4=+) 8.Ndf3 (8.c4 c6=) 8...0-0 9.e3 c6 10.Be2 Ne4 11.h3 (11.c4 Ne5 12.de5 Be7=) 11...f6 12.Nd3 (12.Nd7 Qd7 13.c4 b5=) 12...a5 13.Nc5 ab4 14.ab4 Qb6 15.Ba3? (better 15.Nd7 Qb4 16.Nd2 Nd2 17.Nf8 (17.Qd2? Qb2 18.Ra8 Ra8-+) 17...Ne4 18.Kf1 Be2 19.Ke2 Rf8 20.Ba3 Nc3 21.Kf3 Qa3 22.Ra3 Nd1 23.Rb3 Nf2 24.Kf2=) 15...Ra3!-+ (15...Ndc5 16.dc5 Bc5 17.bc5 Qa5 18.Kf1+=; 15...Bc5?! 16.dc5 Qc7 17.Bb2=+) 16.Nd7 (16.Ra3 Qb4 Double attack (16...Qb4 Decoy)) 16...Qb4 (16...Bb4?! 17.Kf1 Qa5 18.Ra3 Qa3 19.Nf8-/+) 17.Kf1 Rfa8 18.Rc1 (18.Ra3 Ra3 19.g4 Be8-+) 18...b6 (18...Nc3 19.Qd2 b6 20.Bd3-+) 19.Qe1 (19.c4 R3a7 20.c5 bc5 21.Nc5 Nc5 22.dc5 Bc5-+) 19...Be8 20.Qb4 Bb4 21.Nb6 (21.Nf6 gf6 22.g4 Ra2-+) 21...Rb8 (better 21...Ra1 22.Rd1 Rd1 23.Bd1 Ra1-+) 22.Nc4 dc4 23.Bc4 Kf7 24.g4 Rc3 (better 24...c5!? 25.Kg2-+) 25.Bd3 Nd6 26.g5 (26.Ke2 c5 27.dc5 Rc5-+) 26...c5 27.Rg1 Nf5 (27...Bb5 28.Bb5 Nb5 29.dc5 Bc5 30.gf6 gf6 31.Rg4-+) 28.Be4 (28.dc5 Bc6 29.Ke2 Rc5-+) 28...Bb5 29.Kg2 Nd6 (29...Be2 30.d5 Bf3 31.Bf3 fg5 32.Be4-+) 30.Bd3 (30.Bh7 Bc6 31.dc5 Rc5-+) 30...Bd3 31.cd3 Rc1 (better 31...cd4!? 32.Nd4 fg5 33.Nc6-+) 32.Rc1 cd4 33.Nd4 (33.Rc7 Kg6 34.Nd4 e5-+) 33...Rc8 (33...fg5!? 34.Nc6 Ba3 35.Rc2-+) 34.Rc8 Nc8 0-1. Williams,Barry - Lukey,Stepen, NZL New Zealand Civic, 1999.

4.b5 f6 5.g4 fe5 6.gh5 Nf6 7.Bb2 Nbd7 8.e3 c5 9.c4 d4 10.ed4 (10.Bg2!? Qb6 11.d3=) 10...ed4-/+ 11.Bg2 Qc7 12.Qe2 Rb8 13.Ba3 (13.Bh3 e5=+) 13...Qe5-/+ 14.Bf3 (14.Qe5 Ne5 15.Bf1 e6-/+) 14...d3 15.Qe5 Ne5 16.Bd5 Nd5 17.cd5 Nf3 18.Kd1 b6 (18...Nd4!? 19.Bb2 Nc2 20.Rg1-+) 19.Bb2-/+ Rd8 20.Nc3 Rd6 21.h4 c4 (21...Rf6 22.Ne4 Rf4 23.Ng5 Ng5 24.hg5 Rf2 25.a4-/+) 22.Rh3 (22.Rc1 Kd7=+) 22...Nd4 23.Rg3 g6 (23...Nc2 24.Rc1 Rf6 25.Rc2 dc2 26.Kc2=+) 24.Rg4 (better 24.Rg5!? h6 25.Rg6 Rg6 26.hg6=+) 24...Bg7=+ 25.Rb1 (25.Rc1 Rg8 26.Ne4 Rd5 27.Rc4 Nb5 28.Rc8 Rd8 29.Rd8 Kd8 30.Bg7 Rg7 31.f4=+) 25...e5?? (25...0-0 26.Ne4 Rd5 27.hg6-+) 26.Rg5?? (better 26.Ne4 Rd8 27.Bd4 ed4 28.hg6 Rd5 29.Rc1+=) 26...Rf6?? (better 26...0-0 27.Ne4 Rd5 28.hg6 Rf4 29.Bd4 Rd4-+) 27.Re5+= Kd7 28.Ne4?? (28.h6 Rf2 29.hg7 Nf3=) 28...Rf5 (28...Rf2 29.Re7 Ke7 30.Nf2 Kd7-+) 29.Rf5= gf5 30.Ng5 (30.h6!? Be5 31.Ng5=) 30...Re8 31.Bd4 (31.Rc1 Nc2 32.Rc2 dc2 33.Kc2 Bb2 34.Kb2 Kd6-/+) 31...Bd4-/+ 32.Nh7?? (32.Rb4 Bf2 33.Nf3-+) 32...Kd6 (better 32...Re4 33.f4 Re2 34.Ng5 Rh2 35.Nf3 Rh1 36.Ne1 c3 37.h6 c2 38.Kc1 Re1) 33.Rc1 (33.Ng5 Re2 34.Rc1 Rf2-+) 33...Kd5 (33...Bf2 34.Rc4 Re1) 34.Ng5-+ Rh8 (better 34...Bf2 35.Nf3 Rg8 36.Rc4 Kc4-+) 35.Ke1 Rh5 36.Nf3 Bf6 37.Kf1 Bh4 38.Kg2 Bf6 39.a4 Rh7 40.Rd1 (40.Kg3 Be7-+) 40...Kc5 41.Rb1 Re7 42.Kg3 c3 (42...Be5!? 43.Kg2-+) 43.dc3 Bc3 44.Rc1 (44.Kf4-+) 44...Kb4 45.Rd1 Kc4 (45...Rd7 46.Kf4-+) 46.Kf4 Re2 Black prepares d2 47.Kf5 Rf2 48.Ke4 (48.Kf4 Re2 49.Ng1 Rd2 50.Rd2 Bd2 51.Kf3 Bb4-+) 48...Re2 49.Kf4 d2 50.Nd2 (50.Rb1 Re1 51.Ne1 de1Q (worse 51...de1R 52.Re1 Be1 53.Ke5-+; 51...de1N?! 52.Ke3-+; 51...de1B?! 52.Rd1-+) 52.Re1 Be1-+) 50...Rd2 (worse 50...Bd2 51.Kf3 Re3 52.Kf2-+) 51.Rh1 (51.Rd2 Bd2 52.Ke4 Bf4-+) 51...Ra2 52.Kf5 Ra4 53.Ke6 (53.Ke4 Kb5 54.Kd3 Ra3-+) 53...Kb5 54.Rh3 Rc4 55.Rh7 a5 56.Kd5 a4 57.Rh1 (57.Ra7 Rd4 58.Ke6 Kb4-+) 57...a3 58.Rh2 Kb4 59.Ra2 Bb2 (59...Bb2 60.Ra3 Rc5 61.Ke4 Ka3-+) 0-1. Mueggenburg,R (1665) - Laloucek,Miroslav (1730), World Senior Teams +50, 2020. (=1.Nf3 d5 2.b4 Bg4 3.Ne5)

4.d4= Nd7 5.a3 =.

4.d4= e6 5.a3 Nd7 6.Nd3 Ngf6 7.Nd2 (7.Nf4 Bg6=) 7...c6 (7...Bd6 8.c4+=) 8.g3 (8.Nb3 Bd6+=) 8...Bd6 (8...a5 9.Rb1+=) 9.Bg2 0-0 (9...a5 10.c4+=) 10.0-0 (10.c4 Bg6+=) 10...a5 (10...e5 11.Nb3+=) 11.Bb2 (11.c4 ab4 12.c5 Bc7–/+) 11...Re8 (11...ab4 12.ab4 Qe7 13.Ba3–/+) 12.Re1 (12.c4 Bg6 13.Nc5 Qc7+=) 12...Qe7 (12...ab4 13.ab4 Qb6 14.Bc3+=) 13.c4 ab4 14.c5 Bc7 15.ab4 e5 (15...Bg6 16.Qb3=) 16.de5 Ne5 17.Nf4 (17.Ra8 Ra8 18.Nf4 Bg4=) 17...Bg4 (17...Ra1 18.Qa1 Bg4 19.e4 de4 20.Ne4 Ne4 21.Re4=) 18.h3 (18.Ra8 Ra8 19.h3 Bf5=) 18...Bf5 (18...Ra1 19.Qa1 Bf5 20.Bd4=) 19.Ra8 Ra8 20.e4 de4 21.Ne4 Ne4 22.Be4 Rd8 23.Qb1 Re8+= 24.Ng2? Nf3!–+ 25.Bf3 Bb1 26.Re7 Re7 27.Bc3 Be4 28.Bd1 Bg2 29.Kg2 Be5 30.Be5 Re5 (30...Re5 31.Kf3 Rd5–+) 0–1. Gonzalez,Lutgarda – Morales,J, Equador, 1989.

4.d4 e6 5.a3 Nd7 6.Nd7 Qd7 7.Nc3 Nf6 8.f3 Bd6 (8...Bg6 9.Bg5+=) 9.Bg5 h6 10.Bf6= gf6 11.e4 0-0-0 12.ed5 ed5 13.Kf2 Be7 14.Qd2 Bg6 15.Re1 Rde8 16.Bd3 f5 (16...c6 17.Na4=) 17.h4 (17.Re5 Bf6 18.Bb5 c6 19.Rd5 Qc7=) 17...Bf6 18.Re8 Re8 19.Qf4 Qe6 20.g3 Bg7 21.Ne2 Bh7 22.Qc1 Kb8 23.c3 Bf8 24.Nf4 Qd7 25.Re1 Rc8 26.Ng2 Bg6 27.f4 Rd8 28.Qc2 Bg7 29.Ne3 Qd6 30.Nf5 Bf5 31.Bf5 Bf6 32.Bg4 c6 33.Qf5 Rh8 34.a4 Rf8 35.b5 c5+/– 36.Rd1 Rd8 37.Kg2 cd4 38.cd4 Qe7 39.Kh3 Bh8 40.Rc1+– (40.Rc1 Qf8 41.Rc5 Bd4 42.Rd5 Rd5 43.Qd5+–) 1–0. jnunes (1815) – pierre (2160), internet, 2007.

4.d4= e6 5.a3 Nd7 6.Bf4 Ngf6 =.

4.d4= e6 5.Qd3 c6 =.

4.d4 f6 5.Nf3 e6 6.a3 Bd6 7.Nbd2 Nd7 8.e3 Ne7 9.c4 c6 10.Be2 0-0 11.0-0 e5 12.de5 fe5 (worse is 12...Be5 13.Ne5 Be2 14.Nc6 Bd1 15.Nd8+=) 13.Ng5 Be2 14.Qe2 Rf6 15.Bb2 Qe8 16.cd5 cd5 17.f4 Qg6 18.Rad1 Rc8 19.Qb5 Nb6 20.Ndf3 (20.Ngf3 Nf5 21.Rfe1 e4 22.Bf6 ef3=) 20...Nc6 (20...e4 21.Bf6 gf6 22.Nh4+=) 21.h4 (21.Rd5 Rff8 22.Be5 Be7+–) 21...h6 (better is 21...Re8=) 22.fe5+/– hg5? (better is 22...Be5 23.Be5 Rff8+/–) 23.ef6+– (23.ed6 Rf3 24.Rf3 Qc2 25.Rd5 Qb2 26.Rg5 Qc1 27.Kh2 Qc2+–) 23...gf6 24.a4 (better is 24.Rd5!? Rd8 25.Rdd1 Be7 26.Rd8 Bd8 27.hg5 fg5+–) 24...Bb4 25.Rc1 (better is 25.hg5 Qe8 26.Kf2+– (26.gf6?! Qe3 27.Kh2 Bd6 28.g3 a6+/–)) 25...Qe4+= 26.Bd4 (26.Bf6 Qe3 27.Kh2 Qf4 28.Kg1 Qf6 29.Rc6 Qc6 30.Qb4 Qa4+= (30...Na4 31.Qg4 Rf8 32.Qg5 Kh8 33.Re1 Qb6 34.Kh1+–)) 26...Nd4 (26...g4 27.Bb6 gf3 28.gf3 Qe6+/–) 27.Rc8+– (27.ed4?? Rc1 28.Rc1 Qe3 29.Kh2 Bd6 (29...Qc1?! 30.Qb4 Qf4 31.Kg1–+) 30.Ne5 fe5–+ (30...Qc1?! 31.Qe8 Kh7 32.Qf7 Kh8 33.Qf6 Kh7 34.Qg6 Kh8 35.Qh6 Kg8 36.Qd6 Qf4 37.g3 Qf2 38.Kh3 Qf5 39.Ng4=; 30...Be5 31.de5 Qf4 32.g3 Qc1 33.Qe8 Kg7 34.Qe7 Kg6 35.Qf6 Kh5 36.Qf3 g4 37.Qf5 Kh6 38.Qf6 Kh7 39.Qf7 Kh8 40.Qf8 Kh7 41.Qf7 Kh6 42.Qf6 Kh5 43.Qf5 Kh6 44.Qf6=)) 27...Nc8 28.ed4 Bc3 29.Qc5 Qe3 30.Kh1 Ne7 31.hg5 fg5 32.Ne5?? (better is 32.Qc7 g4 33.Qd7 gf3 34.Qg4 Kh7 35.Rf3 Qe1 36.Kh2+–) 32...Qe2 (worse is 32...Bd4 33.Qe7 Qh3 34.gh3 Bf2 35.Qf7 Kh8 36.Ng6) 33.Rc1 Qh5?? (better is 33...Bb2=) 34.Kg1+– Bd2 35.Qe7 Be3 36.Kf1 Bc1 37.Qd8 Kg7 38.Qc7 Kg8 39.Qb8 Kg7 40.Qb7 Kf6? (40...Kf8 41.Qb8 Qe8 42.Qa7+–) 41.Qa6 Kf5 (41...Ke7 42.Qa7 Ke8 43.Qb8 Ke7 44.Qc7 Ke8 45.Qd7 Kf8+–) 42.g4 (42.g4 Qg4 43.Qc8 Ke4 44.Qg4 (44.Qc1?! Qh3 45.Kg1 Qg3 46.Kh1 Qh3 47.Kg1 Qg3 48.Kf1 Qh3 49.Kg1=) 44...Bf4 45.Nc6+–) 1–0. Penillas Mendez,Ismael – Martin Manzano,Antonio, Candas op, 1997. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bh5)

4.g4 f6 5.gh5 fe5 6.Bh3 Nf6 7.d3 Qd6 8.0-0 Qb4–/+ 9.c4 dc4 10.Na3 cd3 11.Qd3 e6 12.Rb1=+ Qe4 13.Qe4 Ne4 14.Nb5 Na6–/+ 15.Bg2 Nec5 16.Rd1 c6 17.Na3 Rd8 18.Rd8 Kd8 19.Nc4 e4 20.Bg5 Kc7 21.Kf1 Bd6 22.Nd6 Kd6 23.Rd1 Kc7 24.Bf4 Kb6 25.Rd4 Rf8 26.Bd6 Rf5 27.h6 g6 28.Be4 Ne4 29.Re4 Nc5 30.Rb4 Ka6 31.Rd4 Kb5 32.a4 Kb6 33.Bc5 Rc5 34.Rd7 Ra5 35.Rh7 Ra4 36.Rg7 Rh4 37.Rg6 Rh2 38.Re6 a5 39.Kg1 Rh5 40.f4 a4 41.Re4 Rh6 42.Ra4 Kc5 43.f5 b5 44.Rf4 Kd6 45.f6 Rh8 46.Rf5 Rb8 47.Kf2 Ke6–/+ 48.Rc5 Rb6 49.Ke3 Kf6 50.Kd4 Ra6 51.Rh5 Ra4 52.Kc5 Rc4 53.Kd6 Kg6 54.Re5 b4 55.Re8 b3 56.Rb8 Rc3 ½–½. Taulien,Hans_Juergen (2225) – Baumann,Heinz (2245), RSX5D – X–Mas, 2005.

4.g4 Bg6 5.Bg2 Qd6 6.Ng6 hg6 7.h3 c6 8.c4 dc4 9.Na3 Nf6 (worse 9...Qb4 10.Rb1 Qa5 11.Rb7+/-) 10.b5 Ng4 11.bc6 (11.hg4? Rh1 12.Bh1 Qh2-+) 11...bc6 12.Rb1 (12.hg4? Rh1 13.Bh1 Qh2-+) 12...Qf4 13.Rf1 Ne5 14.Qa4 Attacking the isolated pawn on c6. The isolani on c4 becomes a target 14...Qh2 15.Bh1 Rh4 16.Nb5 Ned7 17.Qa5 cb5 (better 17...Nb6!? 18.Na7 N6d7=) 18.Qb5 Qh3 19.Ba8 e5 20.Bb2 a6 21.Qd5 Qf5 22.e4 Qf3?? (better 22...Qe6+/-) 23.Be5+- (23.Be5 Bc5 24.Rb8 (24.Bb8?? Bf2 25.Rf2 Rh1 26.Rf1 Rf1) 24...Ke7 25.Qc4 Bf2 26.Rf2 Rh1 27.Rf1 Rf1 28.Qf1 Qf1 29.Kf1 Ne5 30.Rb7 Kf8 31.Ra7+-) 1-0. jon_lord (2160) - maxistr (2205), League division A3, lichess.org, 2022.

5.Nd3 e5 6.a3 (6.Na3 Nh6=+) 6...Bd6=+ 7.g3 Nc6 8.Bg2 Nge7 9.Nc3 Nd4 10.f3 (10.0-0 0-0=+) 10...c6 (10...0-0 11.0-0=+) 11.e3 (11.Na4 b6=+) 11...e4 (11...Ne6!?=+) 12.ed4= ed3 13.0-0 (13.cd3 Bg6=) 13...Qb6 (13...dc2 14.Qc2 Qd7 15.Rfe1=) 14.Na4+= Qc7 (14...dc2 15.Qc2 Qc7 16.Nc5+=) 15.Nc5 (15.cd3 0-0+=) 15...dc2 16.Qc2 Bg3?? (better 16...Bg6 17.Qb3 Kf7+=) 17.hg3+– Qg3 (17...b6 18.g4 Bg6 19.Ne6+–) 18.Rae1 b6 (18...Kf8 19.Rf2 b6 20.Ne6 Kg8+–) 19.Na4 (better 19.Qf5! bc5 20.Qh5 Qg6+–) 19...Kd7 (19...Kf7 20.f4+–) 20.d3?? (20.Nc3 Bg6 21.Qb3+–) 20...Nf5+– 21.Qf2 Rae8 22.Qg3 (better 22.Nc3!?+–) 22...Ng3= 23.Bh3 Kd6 24.Re8 Re8 25.Rf2 Re1 (25...Ne2 26.Kf1 Ng3 27.Kg2=) 26.Kg2 (26.Kh2 Ne2+=) 26…Ne2= ½–½. Storchak,Vitalij – Morokov,Anatoliy, Novokuznetsk Winter Open, 2010. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bh5 4.Bb2 f6)

5.Nd3 e6 6.a3 c6 7.Nf4 Bf7 8.e3 Ne7 9.Nd3 Ng6 10.Nc3 Bd6 11.h4 h5 12.Be2 Ne7 13.e4 Nd7 14.0-0 Qc7 15.Ne1 0-0-0 16.d4 Rdg8 17.Nf3 Ng6 18.b5 Nf4 19.bc6 Ne2 20.Ne2 bc6 21.ed5 ed5 22.Qd3 Nb6 23.Rfb1 Be6 24.Bc3 g5 25.hg5 Bg4 26.gf6 h4 27.Ne5 h3 28.f3 Bd7 29.g4 Be5 30.de5 c5 31.Qa6 Kd8 32.Ba5 Qe5? (better is 32...Ke8 33.Bb6 ab6 34.Qb6 Qe5 35.Qb8 Qb8 36.Rb8 Kf7 37.Rg8 Rg8+–) 33.Qa7 (33.Bb6?! ab6 34.Qb6 Ke8 35.Qb8 Qb8 36.Rb8 Kf7 37.Rg8 Rg8+–) 33...Ke8 34.Rb6 Bg4 (34...Qa1 35.Kf2 Qe5 36.Rb8 Qb8 37.Qb8 Kf7+–) 35.f7 (35.f7 Kf8 36.Rb8 (36.fg8B?? Qe3 37.Kf1 Qf3 38.Ke1 Qe2; 36.fg8N?? Qe3 37.Kf1 Qf3 38.Ke1 Qe2) 36...Bc8 37.Kf1 Rg1 38.Ng1 Qb8 39.Qb8 Kf7 40.Qf4 Kg6 41.Re1+–) 1–0. Montero,L – Madrid Sole,Pedro, Spain 1st–class, 1992. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bh5 4.Bb2 f6)

5.Nf3 e5 6.a3 Nd7 7.d3 Nb6 8.Nfd2 Na4 9.Bc1 Qd7 10.c4 dc4 11.Nc4 a6 12.Qc2 Ne7 13.e4 b5 14.Na5 Qd4 15.Nb3 Qd7 16.Be3 Nc6 17.N1d2 Bd6 18.Rc1 Ne7 19.Nc5 Bc5 20.bc5 Nc6 21.Nb3 0-0 22.f3 Bf7 23.Be2 Kh8 24.0-0 Bb3 25.Qb3 Nd4 26.Qd1 Rfd8 27.f4 Ne2 28.Qe2 Qd3 29.Qf3 Nc3 30.Rce1 ef4 31.Bf4 Qf3 32.Rf3 Na4 33.Bc7 Rdc8 (worse is 33...Nc5 34.Bd8 Rd8 35.e5+/–) 34.Bd6 Nc5 35.Rc3 Nd7 36.Rec1 Rc3 37.Rc3 Nb6 38.Kf2 Nc4 39.Bf4 Rd8 40.g4 h6 41.h4 g5 42.hg5 hg5 43.Bc1 Kg7 44.Ke2 Kf7 45.Rh3 Ke6 46.Rh7 Ne5 (better is 46...Rd4 47.Ra7 Re4 48.Kf2 a5–+) 47.Ra7–/+ Rd6 48.Be3? (better is 48.Bd2!?–/+) 48...Rc6–+ (48...Ng4?! 49.Bc5 Rd7 50.Ra6 Ke5 51.a4–/+) 49.Bd4 Ng4 50.Rh7 Ne5 51.Rh6 (51.Ke3–+) 51...Rc4 52.Be5 Re4 53.Kd3 Re5 0–1. Romero Jaime,Pedro (1740) – Ortega Morales,Pedro (1910), Madrid–ch Previa–A, 2008. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bh5 4.Bb2 f6)

6.gh5 Nd7 7.e3 e6 8.Bh3 Bb4 9.Be6 Nc5 10.Bg8 Rg8 11.Be5 Qe7 12.Bb2 0-0-0 13.Qg4 Ne6 14.Rg1 Kb8 15.Qf5 d4 16.e4 (16.Qh7 de3 17.fe3 Ng5–+) 16...Rdf8 17.Qg4 d3 (better is 17...Rf4 18.Qg2 Ng5–+) 18.cd3+= Bc5 19.Rf1 (19.Kd1!?–/+) 19...Nf4–+ 20.Qf3? (20.Qg3 Qd7 21.d4+=) 20...Qd7 21.d4 Bd4 22.Nc3 Bf2! 23.Kd1 (23.Kf2 Nd3 Double attack (23...Nh3 Deflection); 23.Rf2 Nd3 Deflection (23...Nd3 Decoy); 23.Qf2 Nd3 Double attack (23...Nd3 Decoy)) 23...Nd3 (better is 23...Nd5! 24.Qe2 Ne3 25.Kc1 Nf1 26.Qf1 Qd6–+) 24.Qe2 Nb2 25.Kc2 Na4 26.Rf2 Nc3 27.dc3 Qa4 28.Kd2 Rf2 29.Qf2 Qe4 30.Rf1 Qd5 31.Kc1 Qh5 32.Qf8 Qe8 33.Qc5 b6 34.Qd4 Rf8 35.Rd1 Qf7 36.Rd2 h6 37.Kb2 Qf6 38.Qd7 Kb7 39.Qd3 a6 40.Qe4 Qc6 41.Qd4 Qb5 42.Kc2 g5 43.Qe4 Qc6 44.Qd4 Rf4 45.Qg7? Qf6 46.Qd7 Qf5 47.Qf5 Rf5 48.Re2 h5 49.h3 Rf3 50.Rh2 Kc6 51.Rg2 Rh3 52.Rg5 h4 53.Kb3 Rh1 54.Rg6 Kb5 55.Rg5 c5 56.a4 Ka5 57.Rg4 h3 58.Rb4 Rb1 59.Ka3 Rb4 60.cb4 cb4 61.Kb3 h2 0–1. Romero Jaime,Pedro (1735) – Bartolome Chicharro,Jesus (1820), Madrid Low cost Cup, 2009. (=1.Nf3 d5 2.b4 Bg4 3.Ne5 Bh5 4.Bb2 f6 5.g4 fe5)

7.a3 Nd7 8.c4 e6 9.Qc2 (9.Rg1 Ngf6+=) 9...c6 (9...Ngf6 10.Rg1+=) 10.cd5 (10.Nc3 Ngf6+= (worse is 10...dc4 11.Ne4 Qe7 12.Qc4=)) 10...ed5 11.Bh3 Ngf6 12.Qf5 (12.Bf5 a5+=) 12...Kd8 (12...a5 13.ba5 Ra5 14.d4–/+) 13.Rg1 Kc7 (13...a5 14.ba5 Ra5 15.Bc3–/+) 14.Nc3 Re8 (14...d4 15.Ne4 Ne4 16.Qe4=) 15.Rc1 Kb8 (15...Kd8 16.d3+=) 16.Na4 (16.b5 c5=) 16...Qc7 (16...d4 17.Nc5 Nc5 18.bc5+=) 17.Rg5 (17.b5=) 17...g6 (better is 17...Qd8!?+=) 18.hg6+= hg6 (18...Bh6 19.Rg2+=) 19.Rg6+/– Bd6 (19...Rh5 20.Qf3 Rh6 21.Rh6 Bh6 22.b5+/–) 20.d3 (20.b5 Rh5 21.Qf3 Reh8+/–) 20...Rh5 21.Rg5 Reh8 22.Rh5 Rh5 23.Qe6 Nf8 24.Qf6 Rh3 25.Nc5 d4+= 26.f4 ef4+/– 27.Bd4 Nh7?? 28.Qe6+– Rh2 29.Nd7 Kc8 30.Nc5 Kb8 31.Nd7 Kc8 32.Ne5 Kb8 33.Nf7 (33.Nf7 Qe7 34.Qd6 Qd6 35.Nd6+–; 33.Nc4 f3 34.Qe8 Qc8 35.Ba7 Ka7 36.Qc8 Bg3 37.Kd2 fe2+–) 1–0. Miralles,Gilles – Weber,S, Cap d'Agde, 1984.

7.Bg2 e6 +=.

7.Bh3 Qb4 8.Ba3 Qh4 9.Be6 c6 10.Bc8 Nd7 11.Bb7 Rb8 12.Bc6 Ngf6 13.e3 e6 14.h6 Qh6 15.Bf8 Rf8 16.Nc3 Kf7 17.Bd7 Nd7 18.Qg4 Rb7 19.0-0 Kg8 20.Rab1 Rb1 21.Rb1 e4 22.Nd5 Ne5 23.Ne7 Kh8 24.Qg3 Qf6 25.Kg2 Nf3 26.Nc6 e5 27.Rb7 g6 28.Na5 Nh4 29.Kg1 Nf5 30.Qh3 Nh4 31.Qg3 Nf5 32.Qh3 ½–½. Heinzel – Stolte, 1992.

4.ef3 e5 5.a3 a5 6.b5 Bc5 7.Be2 Nf6 8.0-0 0-0 9.d3 c6 10.a4 Qb6 11.Nd2 cb5–/+ 12.ab5 Bd4 13.Rb1 a4 14.Ba3 Rd8 15.g4 Nbd7 16.c4 Nc5 17.Qc2 Ne6 18.cd5 Nd5 19.Nc4 Qc7 20.Rfc1 Nc3 21.Bf1?! Nb1 22.Qb1 e4 23.Nd6 Qe7 24.Qb4 ef3 25.Re1 Qh4 26.Ne4 Ng5 27.Re3 Be3 28.fe3 Ne4 29.Qe4 Qg3 30.Kh1 Qf2 (30...Qf2 31.Qf3 Qf3 32.Bg2 Qe3–+) 0–1. Ivanets,Vladimir (2280) – Kolesnikov,Evgeny (2380), It (open) Moscow Russia, 2006.

4.ef3 e5 5.a3 Nf6 6.Bb2 Bd6 7.c4 c6 8.c5 Bc7 9.Nc3 0-0 10.Be2 Re8 11.Qc2 Nh5 12.g3 Qg5 13.h4 Qh6 14.0-0-0 Nd7 15.g4 (better is 15.Qf5!? Nhf6 16.Qg5+=) 15...Nf4–/+ 16.Qf5 d4 (16...Ne2?! 17.Ne2 Qe6 18.Qe6 Re6 19.Rhe1+=) 17.Bc4 dc3 (17...Re7!? 18.Ne2 Ne2 19.Be2 a5+=) 18.Qd7 (18.Bf7 Kf8 19.dc3+/– (worse is 19.Be8 Ke8 20.dc3 Nf8=)) 18...cb2+= 19.Kb2 Rec8?? (better is 19...Qf6 20.Qc7 b5 21.cb6 ab6=) 20.Bf7+– Kh8 21.g5 Qh5 22.Bh5 Nh5 23.d4 ed4 (23...a5 24.Rhe1 ab4 25.ab4+–) 24.Rhe1 a5 25.Rd4 ab4 26.Qg4 (26.Rde4 ba3 27.Ka2 Rf8 28.Qc7 h6 29.Qb7 Rab8 30.Qc6 hg5 31.hg5 Nf4+–) 26...ba3 27.Ka2 g6 (27...Nf4 28.Rf4 Bf4 29.Qf4 Rf8+–) 28.Rd7 Bf4 29.Ree7 Rf8 (29...Re8 30.Qe6 Ng7+–) 30.Rh7 (30.Rh7 Kg8 31.Qe6 Rf7 32.Qf7) 1–0. Parron Luceno,David – Elizondo Market,Juan Marcos (1865), VIII Primavera de Gros, 2012. (=1.Nf3 d5 2.b4 Bg4 3.h3 Bf3)

4.ef3 e5 5.Bb2 Bd6 6.f4= Nd7 7.b5 Ngf6 8.fe5 Be5 9.d4 Bd6 10.Bd3 0-0 11.0-0= Nb6 12.Nd2 Re8 13.c4 dc4 14.Nc4 Nc4 15.Bc4 Qd7 16.Qc2 Qf5?? 17.Qb3 Rf8 18.Rfe1 Qf4 19.g3 Qf3?? 20.Qf3+– 1–0. pumpkin (2255) – nbarletta (2045), net–chess.com, 2003.

4.ef3 e5 5.c3 Bd6=+ 6.Bb5 c6 7.Ba4 Qf6 8.Bb2 Ne7–/+ 9.0-0 Nd7 10.d3 0-0 11.Nd2 Ng6 12.Rb1 Nf4–+ 13.Bc2 Rae8 14.Re1 Qg6 15.g3 Nh3 16.Kg2 Nf4 17.Kg1 Re6 18.d4 Qg5 19.de5? Rh6 20.ed6 Qh5 21.gf4 Qh1# 0–1. grahamtrue (2070) – pierred (2595), net–chess.com, 2008.

4.ef3 e6 5.Bb5 c6–/+ 6.Ba4 Bb4 7.0-0 Nd7 8.a3 Bd6 9.Bb2 Qg5 10.Nc3 Ne7 11.g3 Nf5 12.Ne2 Bg3! 13.Ng3? Ng3 14.fg3 Qg3 15.Kh1 Qh3 16.Kg1 Qg3 17.Kh1 Qh4 18.Kg2 Qa4 19.Rg1 d4 20.c3 Qb5 21.Rb1 0-0-0 22.cd4 Nb6 23.Bc3 Qg5 24.Kf2 Qf6 25.d5 Qh4 26.Ke2 Nd5 27.Qb3 Nc3 28.dc3 Qh2 29.Ke3 Qd2 30.Ke4 f5 31.Ke5 Qe3# 0–1. jolaw – pierre (2120), internet, 2007.

4.ef3 e6 5.d4 Bb4–/+ 6.c3 Bd6 7.Be2 Nf6 8.Bg5 0-0 9.0-0 c5 10.Qb3 Qc7 11.Bf6–/+ gf6 12.Nd2 c4 13.Qb5 a6 14.Qb2 Nc6 15.a4 Rab8 16.Rfb1 b5 17.a5 b4 18.cb4 Rb4 19.Qc3 Rb1 20.Nb1 e5 21.Qd2 ed4 22.Na3 Bb4 23.Qh6 d3 24.Bd1 Qe5 25.f4 Qa1 26.Qh5 Ba3 27.Kh2 Qd4 28.Qg4 Kh8 29.Qd7 Qf4 30.Kg1 Bc5 31.Bf3 Qc1 32.Kh2 Bf2 33.Qc6 Qg1 0–1. juancabeta – pierre (2165), internet, 2007.

4.gf3 a6 5.e3 Nf6 6.Bb2 e5 7.Be5 Bb4 8.c4 Nc6 9.Qa4? (Better is 9.Bb2!? 0-0 10.cd5 Nd5 11.Rg1=+) 9...dc4–+ 10.Bc3 b5 11.Qc2 Bc3 12.Nc3 Ne5 13.Qf5 Qd6 14.Rg1 (14.Ne4 Ne4 15.Qe4 0-0–+) 14...g6 15.Qf4 0-0-0 16.0-0-0 Nd3 17.Bd3 Qf4 18.ef4 Rd3 19.Ne4 Nd5 20.Nc5 Rf3 21.Na6 Nf4 22.Rg5 f5 23.h4 Nd3 24.Kc2 Kb7 25.h5 Ra8 26.hg6 hg6 27.Rg6 Ra6 28.Ra6 Ka6 0–1. BigSky (2705) – scarabot (2515), ICC, 1998.

3.Bb2 f6 (--> 1.b4 g6 2.Bb2 f6 3.Nf3 d5).

3.Bb2 Bg7?? 4.Bg7+– f6 5.e3 (5.Bh8 Nh6+–) 5...e5 (5...Kf7 6.Bh8 Nh6 7.Bf6 ef6 8.Be2+–) 6.c4 (6.Bh8 e4+–) 6...Kf7 (6...e4 7.cd5 ef3 8.Bh8 fg2 9.Bg2+–) 7.Bh8 Nh6 (7...e4 8.Nc3 Ne7 9.Nd4+–) 8.Bf6! Kf6 (8...Qf6 9.cd5 Combination; 8...Kf6 9.cd5 Combination) 9.Nc3 c6 10.d3 Bg4 11.Be2 Nd7 (11...Bf3 12.Bf3 d4 13.Ne4 Kg7 14.0-0+–) 12.cd5 cd5 13.Nd5 Kg7 14.0-0 Nf8 15.Nc3 Nd7 16.Ne4 Nf6 (16...Nf7 17.Rc1+–) 17.Ne5 Ne4 18.Ng4 Nc3 19.Qd2 Ne2 20.Qe2 Nf5 (20...Ng4 21.Qg4 Qd6 22.Qe4+–) 21.Qb2 Kg8 22.Rac1 h5 23.Nf6 Kf7 24.Ne4 Qb6 (24...Qe7 25.Rc5 Rd8 26.Re5+–) 25.Qb3 (better is 25.Qe5 Kg8+–) 25...Kg7 26.Qc3 Kh6 27.a3 (27.Qe5!? Qd8 28.Rc7 Rc8+–) 27...a5 (27...Re8 28.Qc7+–) 28.Qc5 (better is 28.Qe5 ab4 29.Rc7 Qc7 30.Qc7 ba3 31.Qb7 Rd8+–) 28...Qd8 29.Rfd1 b6 (29...ab4 30.ab4 Ra4 31.Qe5 Rb4 32.Qf4 Kg7 33.Rc7 Kg8 34.Rdc1+–) 30.Qc7 (better is 30.Qe5 ab4 31.Rc7 Qc7 32.Qc7 ba3+–) 30...Qh4 (30...Qc7 31.Rc7 ab4 32.ab4+–) 31.Qf7 (better is 31.b5 a4+–) 31...Rd8 (31...Qe7 32.Qe7 Ne7 33.b5+–) 32.Rc7 1–0. algernon (2325) – vaingrecsky (2230), net–chess.com, 2013.

3.Nc3 d4 4.Na4 Bg7 5.Bb2 b5 (5...Bg4!?=) 6.Nc5+/– Na6 7.e3 Nb4 (7...Nc5 8.bc5 a6 9.a4 ba4 10.Bd4 Bd4 11.ed4+/–) 8.Nd4 (8.Bd4?! Bd4 9.Nd4 a6+/–; 8.ed4?! Rb8+=) 8...c6?? (better is 8...Qd6 9.Bb5 c6+–) 9.Nc6! Nc6 (9...Qc7 10.Bg7 Qc6+–) 10.Bg7 Qd6 11.d4 Nf6 12.Bh8 Bd7 13.Bf6 ef6 14.Bb5 a6 15.Ba4 Bf5 16.g4 Be6 17.Ne4 f5 18.Nd6 Kf8 19.Qf3 fg4 20.Qc6 Kg7 21.Qa8 Bf5 22.e4 Bd7 23.Bd7 g3 24.hg3 h5 25.Qe8 Kh6 26.Qh8 Kg5 27.Nf7 1–0. Anonymous – Haust, sv.lichess.org, 2011.

3.Nc3 Bg7 4.e3 Nc6 5.b5 d4 (5...Ne5 6.Bb2=) 6.bc6 dc3 7.cb7 Bb7 8.Rb1 Nh6?? (better is 8...Bd5=) 9.Rb7+– a5 (9...0-0 10.d4+–) 10.Bb5 Kf8 11.d3 (11.Bd3 Nf5+–) 11...Rb8?? (11...Qd5 12.Rc7 Qb5+–) 12.Rb8 Qb8 13.Bc4 Qb1 (13...Nf5 14.0-0+–) 14.e4 e6 (14...Qb4+–) 15.Ba3 Ke8 16.Qb1 (16.Qb1 Nf5 17.ef5 Kd7 18.Qb7 Kd8 19.Bb5 c6 20.Bc6 gf5 21.Qd7#) 1–0. pierre – tiffidy, internet Microsoft, 2012.

3.Bb2 Bf5 (--> 1.b4 d5 2.Bb2 Bf5 3.Nf3 h6).

3.Bb2 Nf6 4.e3=.

3.c3 Nc6 4.h3 a6 5.e3 Nf6 6.Bd3 Qd6 7.a4 e6 8.b5 Nb8 9.a5 (9.Ba3 Qd8=) 9...Be7 (9...ab5 10.Bb5 Bd7 11.Bd7 Qd7 12.Qb3+=) 10.Nd4 (10.Ba3 Qd8=) 10...0-0 11.Qf3 Bd7?? (better is 11...ab5 12.Bb5 Qd8+=) 12.Ba3+– c5 (12...Qe5 13.Be7 Re8 14.Bf6 Qf6 15.Qf6 gf6 16.ba6 Na6+–) 13.bc6 Qc7 14.cd7 (better is 14.Be7 Nc6 15.Bf6 gf6 16.Nc6 Qc6 17.Qf6+–) 14...Ba3 15.Ra3 Qd7 16.0-0 Nc6 17.Nc6 bc6 18.c4 Qd6 19.Qe2 Kh8 (19...e5 20.cd5 cd5 21.Rc3+–) 20.Bc2 1–0. neilo – Pamella, ChessWorld.net, 2011.

3.c3 Bf5 4.d4 (4.d3 Nf6=) 4...e6 5.e3 Bd6 6.Bd3 Ne7 7.Bf5 (7.0-0 Nd7=) 7...Nf5=+ 8.Nbd2 a5 9.ba5 Nc6 (9...Ra5 10.e4 de4 11.Ne4=) 10.c4= Bb4 11.cd5 Qd5 12.0-0 Nd6 13.Qc2 0-0 14.e4 Nd4–/+ 15.Qb2 Nf3–+ 16.gf3 Qa5 17.Nb3 Qh5 18.Qe2 Bc3 19.Bb2 Bb2 20.Qb2 Qf3 21.e5 Ra4 22.Nd4 Qg4 23.Kh1 Rd4 24.f3 Qf4 (25.ed6 Rd2 26.Qd2 Qd2–+) 0–1. Domenche Redondo – Gross, corr 3GMM–19, 1995.

3.c3 Nf6 4.d4 =.

3.c4 dc4 4.Qc2 =.

3.c4 Nf6 4.cd5 Nd5 5.a3 a5 (5...Bg4 6.d4=) 6.b5 (6.e4 Nf6 7.Qa4 Bd7+=) 6...e5 (6...Bg4!?=) 7.Ne5+= Nd7 8.Nc4 N7f6 (8...N7b6 9.Nb6 Nb6 10.d4+=) 9.Qc2 (9.d3 Bc5 10.d4 Be7+/–) 9...Bc5 (9...Bd7 10.Nc3+=) 10.e3+/– 0-0 11.d4 Bd6 12.Be2 Re8 (12...Bg4 13.Bd3+/–) 13.0-0 a4 14.Nbd2 Bd7 (14...Be6 15.Bd3+/–) 15.Rb1 Qe7 16.Bd3 Nb6 17.f3 (17.Nb6 cb6 18.Nc4 Be6 19.Nb6 Bb3+/–) 17...Be6+/– 18.e4 Bf4 (18...Bc4 19.Nc4 Nc4 20.Bc4 Ba3 21.Bf7 Kf7 22.Qa2 Qe6 23.Qa3+–) 19.Nb6+– cb6 20.d5 (20.d5 Be3 21.Kh1+–) 1–0. 0404it – marekt, internet, 2010.

3.d4 e5 4.Ne5 Bb4 5.Bd2 Bd6 =.

3.d4 e6 4.g4 (better is 4.a3=) 4...Bb4–/+ 5.c3 Bd6 6.g5 hg5 7.h4? (better is 7.Bg5!? Ne7 8.Bh4–+) 7...g4 (7...gh4 8.Bg5 Be7 9.Be7 Qe7 10.Qd2–+) 8.Ng5 (8.Ne5 Rh4 9.Rh4 Qh4 10.Qa4 Nd7–+) 8...f6 9.Qa4 (9.e4 fg5 10.Bg5 Be7 11.Be7 Qe7 12.Qg4 Nf6 13.Qg6 Kd8–+) 9...Bd7 10.Ne6 (10.Qb3 fg5 11.Qb7 Bc6–+) 10...Qe7 (10...Ba4 11.Nd8 Kd8 12.Bg2–+) 11.Qa5 (11.Nc7 Bc7 12.Qc2–+) 11...Qe6 12.f3 (12.Bg2 c6 13.Qa4–+) 12...gf3 (12...b6 13.Qb4 Bb4 14.cb4 gf3 15.Bf4–+) 13.h5 (13.c4–+) 13...b6 14.Bh3 Qe2 0–1. bouffant – gmoniee, net–chess.com, 2002.

3.d4 Nf6 4.c3 Bf5 5.e3 a5 6.Bd3 e6 7.Bf5 ef5 8.b5 Bd6 9.Qc2 Ne4 10.Nbd2 0-0. vpatil – pierre (2140), internet, 2010.

3.e3 e5 4.Ne5 Bb4 5.Bb2 Nf6 6.Be2 0-0 7.0-0 Nbd7 8.f4 Nb6 (8...Re8 9.c4=) 9.a3 Bd6 10.c4 Re8 11.cd5 Nbd5 12.Bc4 Be6 13.Qb3 (13.Qf3 c6=) 13...Nb6 (13...c6 14.f5 (worse is 14.Qb7 Rb8 15.Qa7 Rb2–/+) 14...Bc8 15.d4+=) 14.Be6 fe6 (14...Re6? 15.Nf7 Kf7 16.f5+–) 15.a4 Nbd5 16.Na3 (worse is 16.Qb7 Rb8 17.Qa7 Rb2–/+) 16...Bb4 17.Nac4 Ne4 18.d3 Nd2 19.Nd2 Bd2 20.e4 Nf4 21.Rad1 Ne2 22.Kh1+= Qh4 23.Rd2 Ng3 24.Kg1 Nf1 25.Kf1 Qh2 26.Qb7 Qh1 27.Kf2+/– Qh4 28.Ke2 Qh1 29.Kf3?? Rf8–+ 30.Kg4 h5 31.Kg5 Qe1 32.Nf3 Qg3 33.Kh5 Rf3 34.Qa8 Kf7 35.Qe8 Ke8 36.gf3 g6 37.Kh6 Kf7 38.Bf6 Qf3 39.Kg5 Qg3 40.Kh6 Qe3 41.Bg5 Qh3 42.Bh4 Qh4# 0–1. COMP – COMP, blitz, 2002.

4.b5 Nb8 5.e3 c6 (5...Nf6 6.Bd3=) 6.Bd3+= Bg4 7.h3 Bh5 (7...Bf3 8.Qf3 Nd7 9.c4+=) 8.g4–/+ Bg6 9.Bg6 fg6 10.Ne5 Qd6 11.Qf3 Nf6 (11...Qe6!?+=) 12.Ng6–/+ Rg8 13.Be5 Qe6 14.Qf5 Qf5 15.gf5 Nbd7 16.bc6 bc6 17.Rg1 Ne5 18.Ne5+– Rc8 19.f4 Nd7 20.Rg6+– Ne5 21.fe5 c5 22.Nc3 d4 23.Nb5 Kf7 24.ed4 h5 25.Na7 Rc7 26.e6 Ke8 27.Rb1 Kd8 28.Rb8 Rc8 29.Rc8 1–0. lucya (2145) – florencioq, GameColony.com, 2002.

4.b5 Nb8 5.e3 Bd7 6.Be2 e6 7.0-0 f6 8.a4 Bd6 9.c4 dc4 10.Bc4 Qe7 11.Nd4 c6 12.Nc3 cb5 13.Ncb5 a6 14.Nd6 Qd6 15.Qf3 Bc6 16.Nc6 Nc6 17.Qh5 Kf8 18.Ba3 Nb4 19.Qa5 Kf7 20.Bb4 Qc6 21.Rac1 Qd7 22.Qb6 Ne7 23.d4 Nc6 24.d5 ed5 25.Bd5 Kg6 26.Bf3 Nb4 27.Qb4 Rac8 28.Qe4 f5 29.Qe5 Rc1 30.Rc1 Rc8 31.Rc8 Qc8 32.h3 b5 33.ab5 ab5 34.e4 1–0. alfy – gab71, kurnik, 2012.