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TESTB Release 2021-06-22
Send your 1.b4 games to me, please. Thank you! /Marek
Marek Trokenheim's homepage
(c) Marek Trokenheim

1.b4 b5

(...)

2.a3 a5 3.c3 a4 4.Nf3 f6 (4...d5!?=) 5.d4 Nh6 (better is 5...d5!?+/–) 6.e4 e6 (6...c6+–) 7.Bb5 Bd6 8.Bh6 gh6 9.e5 fe5 10.de5 (worse is 10.Ne5 0–0+–) 10...Be7 11.Ba4 0–0 12.Bc2 Bb7 13.Qd3 Rf7 14.0–0 (14.Nbd2 Bg5+–) 14...d5 (14...Bf3 15.gf3 d5 16.f4+–) 15.Nbd2 Nc6 16.Nb3 Rg7 17.Kh1 Qe8 18.Rg1 Qf7 19.Nbd2 Rf8 20.Rae1 d4 (20...Nd8+–) 21.cd4 (21.Nd4?! Nd4 22.cd4 Qf2+–) 21...Bg5 22.Ne4 Bf4 23.Nf6 Kh8 24.g3 (better is 24.Qc3!? Ne7+–) 24...Ne5? (better is 24...Nd4!? 25.Ne4 Nc2 26.Qc2 Bg3 27.Rg3 Rg3 28.hg3 Qf3 29.Kg1 Rf5+/–) 25.de5 (better is 25.Re5 Bg5 26.Ne4 Qf3 27.Qf3 Rf3 28.Nc5 (28.Re6?! Re7 29.Re7 Be7+–; 28.Ng5?! hg5 29.Be4 Be4 30.Re4 Ra3+–) 28...Rf2 29.Be4 Be4 30.Re4+–) 25...Bf3?? (better is 25...Be5 26.Ne4 Qf3 27.Qf3 Rf3+–) 26.Qf3 Bg5 27.a4 Bf6 28.ef6 Rg5 29.Qe4 Rf5 30.Qe6 Rf6 31.Qf7 R6f7 32.f4 Kg7 33.a5 h5 34.b5 h4 35.gh4 Kh8 36.f5 Rb8 37.Bd3 h5 38.Rg5 Rh7 39.f6 Rd8 40.Bh7 Kh7 41.Rg7 Kh6 42.Reg1 Rd1 43.Rd1 c6 44.Rdg1 cb5 45.R1g6 1–0. greenbook – pikelet, ChessWorld.net, 2012.

2.a3 d5 (--> 1.b4 d5 2.a3 b5).

2.a3 d6 3.Bb2 Bf5 4.Nf3 e6 5.e3 Bg4 6.Be2 d5 7.Nd4 Be2+= 8.Qe2 Qf6? 9.Qb5+– c6?? 10.Qb7 e5 11.Qa8 Qd8 12.Nc6 Nc6 13.Qc6 Qd7 14.Qa8 Qd8 15.Qa7 e4 16.Qd4 Ne7 17.0–0 Nf5 18.Qe5 Ne7 19.Qg3 f6 20.Qg4 Nc6 21.Qe6 Ne7 22.Qg4 f5?? 23.Qh5+– g6 24.Qe2 Rg8 25.Bf6 Kf7 26.Be7 Be7 27.c4 d4 28.Ra2 d3 29.Qd1 Kf8 30.Nc3 Rg7 31.Nd5 Bb4 32.ab4 g5 33.f3 f4 34.fe4 h6 35.ef4 Rh7 36.fg5 Kg7 37.gh6 Kh6 38.Ra6 Kg5 39.Rf5 Kh4 40.g3 Kh3 41.Nf4 1–0. ahmed sharkawy_1 – crome, ChessWorld.net, 2005.

2.a3 e5 (--> 1.b4 e5 2.a3 b5).

2.Na3 a5 3.ba5 Ra5 4.Nc4?? (4.Rb1 Ba6 5.c4 bc4=+) 4...Ra8 (4...bc4 5.Bb2–+) 5.h4?? h5 6.Ne5 f6?? 7.Nd3?? c5 8.Nc5+= d6 9.Nd3 e5 10.f4 g5 11.hg5+/– fg5 12.fg5 Qg5 13.e4 Nc6 14.Nf3 Qg3 15.Ke2?? Nd4–+ 16.Ke3?? Nf6 17.Be2 Nf3 18.Bf3–+ d5 19.Ke2?? Bg4 20.Rf1?? de4–+ 21.Rf2 Bf3 22.Rf3 ed3 23.Rd3 Qg2 24.Ke1 Qg1 25.Ke2 Qg2 26.Ke3?? Nd5 27.Rd5 Qd5 28.d3 Rg8 29.Qh5 Ke7 30.Ke2 Rg2 31.Kd1 Bh6! 32.Bh6 Rag8 33.Kc1 Qd4 34.Rb1 Rg1 35.Kd2 R8g2 36.Qe2 Re2 37.Ke2 Rb1 38.Bd2 Qg4 39.Kf2 Ke6 40.Ke3 Kd5 41.Kf2 Rb2 42.Kf1 Rc2 43.Kf2 Rd2 44.Ke3 Qf4 0–1. Sarararing – Putte8, Live Game Caissa's Web, 2004.

2.Na3 a6 3.e3 e5 4.c4 c6 5.Qb3 d6 6.cb5 (6.d4 d5 7.cd5 ed4 8.ed4 Qe7 9.Kd1 Qb4+=) 6...ab5+= 7.Bd3 Be6 8.Qc2 Ra4 (8...d5 9.Rb1–/+) 9.h3 (9.Nb5!? Rb4 10.Nc3+=) 9...Rb4 10.Ne2 (better is 10.Bh7 Ra4 11.Bf5 Bf5 12.Qf5–/+) 10...e4?? (better is 10...Qg5 11.Ng3 Nf6–+) 11.Be4= d5 12.d4?? (12.Bh7 Ra4 13.Bg8 Ba3 (worse is 13...Rg8 14.Qh7 f6 15.Nc2+=) 14.Ba3 Ra3–/+) 12...Nf6?? (better is 12...de4 13.Qe4 Ra4–+) 13.Bf3 Ra4 14.Nc3? Ra5 15.0–0?? Ba3–+ 16.Bd2 Bb4 17.Ne2 Bd2 18.Qd2 Ne4 19.Be4 de4 20.Nf4 Bf5 21.g4 Qg5 22.Qa5+– Bg4? 23.hg4 Qg4 24.Ng2 0–0 25.a4 Qg5 26.f4 Qg6 27.ab5 Nd7 28.f5 Qg5 29.bc6 Nb8 30.c7 Nc6 31.Qc5 Ne7 32.d5 Nf5 33.c8Q Ne7 34.Qb7 Qe5 35.Qbe7 Qe7 36.Qe7 g6 37.d6 h5 38.d7 Rb8 39.Qf7 Kh8 40.Qg6 Rg8 41.Qh5 Kg7 42.Qe5 Kh6 43.Qf6 Kh7 44.Ra7 Rg7 45.Kf2 Rg6 46.d8Q Kh6 47.Qdh8 1–0. Eries – Mark_Peck, ChessWorld.net, 2012.

2.a4 g5 3.Bb2 Bb7?? 4.Bh8+– Nc6 5.c3 Bh6 6.ab5 Nb8 7.e3 f6 8.Qh5 Kf8 1–0. marekt – Earnhardt38, uChess rated, 2005.

2.a4 g6 3.ab5 Bg7 4.Nc3 Bc3 (better is 4...Nf6!?+/–) 5.dc3+– c6 (5...Nf6 6.Nf3+–) 6.Qd4 (better is 6.bc6 dc6 7.Qd8 Kd8 8.e4+–) 6...cb5?? (6...Nf6 7.Ra7 c5 8.Qc5 d6+–) 7.Qh8 e6 8.Qg8 Ke7 9.Bg5 f6 10.Bf6! Kf6 11.Qd8 (11.Qd8 Kg7 12.Qc8+–) 1–0. pierre – opponent, internet, 2008.

2.Bb2 g6?? 3.Bh8+– Nf6 (3...f6 4.d4 Nh6 5.Qd3+–) 4.g3 (4.a4 Nc6+–) 4...Bb7 5.Nf3 Nc6 6.Bg2 Bh6 (6...Nb4 7.Nc3+–) 7.0–0 Kf8 8.Bf6 ef6 9.d4 d5 10.Nbd2 Qe7 11.c3 Re8 12.Re1 f5 13.e3 Qe6 14.Nb3 Rb8 15.Nc5 Qc8 16.Ne5 Ne5 17.de5 Qd8 18.Nb7 Rb7 19.Bd5 Rb6 20.Qb3 Bg7 21.f4 c6 22.Bf7 1–0. pumpkin (2330) – bcaley, net–chess.com, 2007.

2.c3 a5 3.ba5 e5 4.e4 Ra5 5.d4=.

2.c3 Ba6 3.e3 Nc6 (3...Nf6 4.Nf3+=) 4.Bb2 (4.a4 Bb7 5.ab5 Nb8+–) 4...e5 (4...Bb7 5.Nf3 a6 6.a4 ba4 7.d4+=) 5.Nf3 (5.a4 Bb7 6.ab5 Nce7+/–) 5...Qe7 (5...e4 6.Nd4+=) 6.d3 (6.a4 Nd8+/–) 6...g6 (6...Bb7 7.a4 ba4 8.Ra4+=) 7.Be2 Bh6 (7...Bg7 8.a4 ba4 9.Nbd2+/–) 8.Nbd2 Rc8 (8...Bb7 9.a4 a6 10.0–0+/–) 9.0–0 (9.a4 ba4 10.Ra4 Bb5+–) 9...d6 (9...Bb7 10.a4 a6 11.ab5 ab5 12.Nb3+/–) 10.a3 (10.a4 Nd8+–) 10...Rd8 (10...g5 11.a4 g4 12.Ne1+–) 11.e4 f5 12.ef5 gf5 13.Rc1 Nd4?? 14.cd4+– ed4 15.Nd4 Nf6 16.N2f3 Bc1 17.Bc1 Rg8 18.Bb2 Bb7 19.Re1 h5 20.Nb3 f4 21.Nc5! dc5 22.bc5?? Nd7?? 23.d4 Nc5?? 24.dc5 Rd1–+ 25.Rd1?? Qe2 (25...Qe2 26.Re1 Rg2 27.Kh1 Qe1 28.Ne1 Rf2 29.Kg1 Rb2–+) 0–1. Fournier,Frederic (1975) – eqg (1705), Active Blind, 2008.

2.c3 Bb7 3.f3 e5 4.e4 a6 5.Bd3 (5.a4 ba4 6.Qa4 Nc6=) 5...d5 6.Bc2 (6.ed5!? Bd5 7.a4=) 6...de4–/+ 7.Be4 Be4 8.fe4 Qh4 9.g3?? (better is 9.Kf1–/+) 9...Qe4–+ 10.Qe2 Qh1 11.Qe5 Ne7 12.Kf2 (12.Kf1 Qh2 13.Qc7 Nbc6–+) 12...Qh2 13.Kf1 c6 14.Qc7 (14.a4 ba4 15.Qe3 h5–+) 14...Nd7 15.d4 Rc8 (better is 15...Nf5!? 16.Bf4 Qb2 17.Qc6–+) 16.Qf4 Qh5 17.Nd2 Qf5 (17...Nd5!? 18.Qf2–+) 18.Qf5 Nf5 19.Kg2 Bd6 20.Ne4 Bc7 21.Nc5 (21.a4 h5–+) 21...Nc5 22.bc5 Ng3 23.Bg5 (23.Kf3 f5–+) 23...0–0 24.Be7 Rfe8 25.Bh4 Ne2 26.Nh3 (26.Ne2 Re2 27.Kf1 Rce8–+) 26...Nc3 27.a3 Re2 28.Nf2 Ne4 (28...Rce8 29.Kf1–+) 29.a4 (29.Kf3 Rf2! 30.Bf2 f5–+) 29...ba4 30.Kf3 Rf2! 31.Bf2 Nf2 32.Kf2 h5 33.Rh1 g6 34.Ra1 g5 35.Ra4 a5 36.Ra3 (36.Ra1 h4–+) 36...f5 37.Re3 (37.Rf3 Rf8–+) 37...Kf7 38.Kf3 g4 39.Kg2 f4 40.Re4 (40.Re1 Re8 41.Rb1 f3 42.Kg1 Bg3–+) 40...f3 41.Kf2 Re8 42.Re8 Ke8 43.Ke3 a4 (43...a4 44.d5 cd5–+) 0–1. edog13 – Duke of Wellington, ChessWorld.net, 2015.

2.c3 e5 3.e3 a6 (3...a5 4.Bb5 ab4 5.cb4=) 4.f4 (4.a4 Bb7=) 4...ef4 5.ef4 Nf6 6.Qf3 c6 7.Nh3 (7.a4 Qe7 8.Ne2 d6=) 7...h6 (7...d5 8.a4 Qe7 9.Be2=+) 8.f5 Be7 9.a3 (9.a4 ba4 10.Ra4 d5=) 9...d5=+ 10.Bd3 0–0 11.0–0 d4 (11...a5 12.Bb2–/+) 12.c4 Nbd7 (12...Re8 13.Re1=) 13.cb5 ab5 (13...Ne5 14.Qg3 Qd6 15.b6=) 14.Qc6+= Rb8 15.Bb5?? (better is 15.Qc2+=) 15...Ne5–+ 16.Qc2 Rb5 17.Nf2 (17.Bb2 d3 18.Qa4 Qb6 19.Kh1 Nc4–+) 17...d3 18.Nd3 (18.Qd1–+) 18...Nd3 19.Qc4 (19.Kh1 Rf5 20.Rf5 Bf5–+) 19...Ba6 (19...Qb6 20.Kh1 Nf2 21.Kg1 N2e4 22.d4 Bf5 23.Nc3 Nc3 24.Qc3–+) 20.Nc3 (20.Qh4 Re5 21.Kh1 Ne4–+) 20...Rb6 (20...Rf5 21.Qf7 Rf7 22.Rf5 Qd4 23.Kh1 Nf2 24.Rf2 Qf2 25.h3 Bf1 26.d4 Qg2) 21.b5 Bc8 (21...Bb7 22.Kh1 Nc1 23.Rfc1 Qd2 24.Qe2 Qe2 25.Ne2 Rb5 26.a4–+) 22.a4 Ne5 (better is 22...Bc5!? 23.Kh1 Nf2 24.Kg1–+) 23.Qe4 Bd6 (24.Qc2 Neg4–+; better is 23...Ne4 24.a5 Qd4 25.Kh1 Nf2 26.Rf2 Qf2–+) 0–1. sbderkach (1680) – iboyd (1950), net–chess.com, 2006.

2.Nc3 d5 3.Nb5 Ba6 4.Nc3 c6 5.Nf3 (5...Nf6 6.a3+/–). fiddler – oasis, chessHere.com, 2006.

2.Nc3 e6 3.Nb5 Nc6 (3...a6!? 4.Nd4 e5=) 4.c3 d5 5.d3 Ba6 6.Na3 Ne5?? (6...Bd6 7.Rb1 Bb7 8.Nb5+/–) 7.d4 (7.Qa4 Nd7 8.Qa6 c5+–) 7...Ng6?? (7...Nd7 8.Qa4 Bb7 9.Qb5+/–) 8.Be3 (8.Qa4 Qd7 9.Qa6 c6+–) 8...Bd6?? (8...Qd7 9.h4+=) 9.Nf3 (9.Qa4 Qd7 10.Qa6 Nf6+–) 9...Nf6?? (9...Qd7 10.h4+=) 10.Qd2 (better is 10.Qa4 Qd7 11.Qa6+–) 10...Ne4 11.Qc2 Be7?? 12.b5?? Bb7 13.g3?? Ba3–+ 14.b6 ab6 15.h4 e5! 16.de5 c5 17.Bg5 f6 18.ef6 gf6 19.Be3 Rc8 20.h5?? Ne7?? 21.Bh6?? c4?? 22.Qa4+= Bc6 23.Qa3 Ra8 24.Qb4 Rb8 25.Bg7 Rg8+/– 26.h6 Nf5 27.Nd4 Ned6?? 28.Nc6+– Qc7 29.Nb8 Qb8 30.Bf6 Qc8 31.Qb6 Kf7 32.Qa5 Kf6 33.Qd5 Re8 34.Bh3 Qe6 35.Qd2 Ne4 36.Qf4 Ned6?? 37.a4 Qe2 0–1. allknight – dumbroad, ChessWorld.net, 2012.

2.c4 c5 3.cb5 cb4 4.e4 Nf6 5.e5 Nd5 6.h4 e6 7.Bc4 (7.d4 d6=) 7...a6 (7...Qc7 8.Be2–/+) 8.ba6 Ba6 9.Bd5 ed5 10.Qa4 (10.Bb2!?+=) 10...Nc6 11.Nf3 Bc5 12.Ng5?? (better is 12.Bb2–/+) 12...0–0 (better is 12...Ne5!? 13.d4 Nd3 14.Kd2 Bd4 15.Rh3–+) 13.a3?? (better is 13.Qc2 g6 14.Qc5 Ne5 15.Kd1=) 13...h6 14.Nh3?? Qe7 15.ab4 Bb4 16.f4 d4 1–0. elgr – erikerik, gameknot.com, 2012.

2.d3 a5 3.ba5 c5 4.e4=.

2.d3 a6 3.e4 e5 4.Nf3 f6 (4...Bb4 5.c3 Bd6 6.Be2+=) 5.c4 (5.Ne5!? Bb4 6.c3 fe5 7.Qh5 Kf8 8.cb4=) 5...bc4 (5...Bb4 6.Bd2 Bd2 7.Nbd2 bc4 8.Nc4–/+) 6.dc4 (6.a3!? Bb7 7.Nc3=) 6...Bb4+= 7.Nbd2 Bd2 8.Bd2 c5 9.Be3 Qb6 10.Qd5 Bb7 11.Qd3 d6 12.Rb1 Qa5 13.Bd2 Qa2?? (better is 13...Qc7=) 14.Rb7+– Ne7 15.Qd6 Nbc6 16.Qc5 Rd8 17.Nh4 (better is 17.Be2+–) 17…Qd2 0–1. desjostedt – donsjostedt (1695), net–chess.com, 2013.

2.d3 Bb7 3.e4 e5 4.a3 a6 (4...a5 5.ba5 Nc6 6.Nf3=) 5.c4 (5.Nf3 a5 6.ba5 Nc6=) 5...bc4 6.Nc3 (6.Nf3 Qe7=) 6...cd3 7.Bd3 g6 (7...Nf6 8.Nf3=+) 8.Nf3= Qe7 9.0–0 c6 (9...Nf6 10.Bg5=) 10.Be3 d6 11.Rc1 (11.Qa4 Nd7+=) 11...Nd7 12.Qe2 h6 13.g4 (13.Bc4!?=) 13...g5 (13...d5 14.Rfd1=+) 14.Rc2 (14.h3 Ngf6=+) 14...Ngf6 15.Rb1 (better 15.h3!?=+) 15...Ng4–+ 16.Bd2 f6 (16...Ngf6 17.Nd1–+) 17.h3 (17.Nh4 gh4 18.Qg4 Qg7 19.Qg7 Bg7–/+) 17...h5 18.hg4 hg4 19.Nh2 (19.Ng5 Bh6–+) 19...Qh7 Do you see the mate threat? 20.Kg2?? (better 20.Qg4 Qh2 21.Kf1–+) 20...Qh2 21.Kf1 Qh1 0–1. Paul593 – Delboy Smith (1795), ChessWorld.net, 2010.

2.d3 Nc6 3.c3 (3.a4 Rb8+=) 3...d5 (3...a5!? 4.ba5 e5=) 4.a4+= Bd7 (4...Rb8!?+=) 5.ab5 Ne5 6.Ra5 (6.e4 Bb5 7.f4 Nd7 8.ed5 Ndf6+/–) 6...c5 (6...Nf6 7.f4 Ng6 8.Nf3+/–) 7.bc6 Bc6 8.f4 (8.e4 e6+/–) 8...Ng4 (8...Nd7 9.Nf3+/–) 9.e3 (9.e4 N4f6 10.e5 Nd7+–) 9...N8f6 (9...N8h6 10.Be2 e6 11.Na3+/–) 10.h3 (10.Be2 Bd7+/–) 10...Nh6 11.Nf3 Nf5 12.g4 (12.Ne5 Qb6 13.Kf2 e6+/–) 12...Nd6 (better is 12...Ng3!? 13.Rg1 Nf1 14.Kf1 Nd7+=) 13.Ne5 Bb7 14.Qa4 Nd7 15.Ra7 Ra7+/– 16.Qa7 Bc8 17.Qa4 g6 18.c4 Bg7? 19.Nc6 Qc7 20.c5 Nb7 21.d4 Nf6 22.Na7 Bd7 23.Bb5 Bb5 24.Nb5 Qd7 25.Nc7 Kd8 26.c6 Qc7 27.Qa8 Qc8 28.cb7 Qa8 29.ba8Q Kd7 30.Qb7 Kd8 31.Nc3 Nd7 32.Nd5 e6 33.Qc7 Ke8 34.Qc8 1–0. UPS – paul, mySchach.de, 2005.

2.d3 d5 3.a3 (3.a4!?+=) 3...Nf6 (3...a5 4.ba5 Nf6 5.Nf3=) 4.g3 (4.a4 ba4 5.Nf3 e6=+) 4...e6 (4...a5 5.ba5 Nc6 6.Nf3=+) 5.Bg2 (5.Nc3 a5 6.Bf4 c6=+) 5...Be7 (5...a5 6.ba5 Nc6 7.Nf3=+) 6.Nf3 (6.Nc3 a5 7.Bd2 Nc6=) 6...c5 (6...a5 7.ba5 Ra5 8.Nbd2=+) 7.Qd2 (7.0–0!?+=) 7...cb4= 8.ab4 Bd7 (8...Nc6 9.Na3=) 9.0–0 (9.Ne5 Nc6 10.Nc6 Bc6=) 9...Qc8 (9...Nc6 10.Na3=) 10.Ne5 (10.Bb2 Nc6+=) 10...0–0= 11.Nd7 (11.c3 Nc6 12.Nd7 Qd7=) 11...Qd7 12.c3 Nc6 13.Na3 (13.Qb2 Rfb8=) 13...a6 (13...a5 14.ba5 b4 15.Nc2 Na5 16.cb4=) 14.Bb2 (14.Qb2 Bd6+=) 14...Qb7 (14...Rfc8+=) 15.d4 (15.Nc2!?+=) 15...a5=+ 16.ba5 (16.Nc2 Bd6=+) 16...Na5 17.Qd3 Ba3 (17...Nb3!? 18.Ra2 Rfb8=+) 18.Ba3= Rfc8 19.Rab1 (19.Rfb1 Nc4 20.Bc5 Qc6=) 19...Nc4=+ 20.Bc5 Nd7?? (better 20...Ra4=+) 21.Bd6?? (better 21.Qc4! bc4 22.Rb7 Nc5 23.dc5 Rc5 24.e4 de4 25.Be4+–) 21...Ra6 (21...Nd6 22.Rfc1–+) 22.e4?? (better 22.Bb4=) 22...Rd6 (22...Nd6 23.e5 Nc4 24.Rfe1–+) 23.ed5 (23.Ra1 h6–+) 23...ed5 24.Rfe1 (24.Bh3 Ra8–+) 24...Rb6 (24...Nf6 25.g4–+) 25.Qe2 (25.Bh3 g6–+) 25...b4 (better 25...Re6 26.Qa2 Re1 27.Re1 Nf6–+) 26.Qe8 (26.Rb4 Rb4 27.cb4–+) 26...Re8 27.Re8 Nf8 28.h4 (28.cb4 Rb4 29.Rd1 Nd6–+) 28...b3 (better 28...bc3 29.Rf1 Rb1 30.Ree1 Re1 31.Re1–+) 29.Kh2 b2 0–1. Benreguia,Frederic – Cavaille,Cedric, FICGS, 2013.

2.d4 a6 3.e4 (3.a4 Bb7+=) 3...Bb7 4.Nc3 d6 (better is 4...Nf6!? 5.e5 Nd5 6.Nd5 Bd5=) 5.Nf3 (5.a4 Nd7 6.ab5 ab5 7.Ra8 Qa8 8.Nb5 Qb8+/–) 5...Nc6 (5...Nf6 6.Bd3+/–) 6.a3 (6.d5 Ne5 7.a4 ba4 8.Ne5 de5+–) 6...h6 (6...g6!?+/–) 7.d5+– Nb8 (7...Ne5 8.a4 ba4 9.Ne5 de5 10.Ra4+/–) 8.Bb2 (8.a4 c6+–) 8...Nf6+/– 9.Bd3 Bc8 (9...c6!?+/–) 10.h3 Bb7 11.0–0 Nbd7 12.Re1 (12.Qe2 Qc8+–) 12...Nh5 (12...g6 13.a4 ba4 14.Ra4+–) 13.e5 (13.a4 ba4 14.Ra4 g6+–) 13...Nf4? (13...de5 14.Ne5 Ne5 15.Re5+–) 14.ed6 (better is 14.e6 Nf6 15.Nd4 N6d5 16.Qf3+–) 14...cd6 15.Bf5 Nb6 16.Be4 Nc4+/– 17.Bc1 Ng6? 18.Bg6+– fg6 19.Nd4 Qd7 20.Ne6 Rc8 21.Qg4 g5?? 22.Qh5 (22.Qh5 g6 23.Qg6 1–0. pillsbury (2070) – grahamtrue (2135), net–chess.com, 2009.

2.d4 c5 3.dc5+– Nc6 4.c3 Ne5 (4...a5 5.Bd2+–) 5.Nf3 (5.a4 Nf6 6.ab5 Bb7+–) 5...Qc7 6.Nd4 e6 (6...a6 7.e4+–) 7.e3 (7.Nb5 Qb8 8.e4 Bb7+–) 7...Ba6 (7...a6 8.a4 ba4 9.Be2+–) 8.f4 Nc4 (8...Nc6 9.Bb5 Bb5 10.Nb5+–) 9.Bc4?? (better 9.a4 d5 10.ab5+–) 9...bc4+– 10.a4 (10.0–0 Nf6+–) 10...d5 11.g3 (11.cd6 Bd6 12.Na3 Rd8+–) 11...Nh6 (11...Nf6 12.a5+=) 12.h4 Nf5 (12...Be7!?+=) 13.Nf5+– 0–0–0?? (13...ef5 14.b5 (14.Qd5?! Bb7 15.c6 Qc6 16.Qe5 Be7=) 14...Bb7 15.c6+–) 14.b5 (14.Nd4!? Bb7+–) 14...Bb7? (14...ef5 15.ba6 Bc5 16.Kf2+–) 15.Rg1 (15.Nd6 Bd6 16.cd6 Qd6+–) 15...g6? (better 15...ef5 16.c6 Ba8+–) 16.Nd4 (16.Nd6 Bd6 17.cd6 Qd6+–) 16...Bc5 17.Nc2 (17.Ba3 Rde8+–) 17...h5 (17...h6 18.Ba3+–) 18.Kf2 (18.Ba3 Ba3 19.Nba3 Qa5+–) 18...Rhg8 (18...e5 19.fe5 Qe5 20.Ba3+–) 19.a5 (19.Ba3 Bb6+–) 19...a6 (19...e5 20.fe5 Qe5 21.Ba3+–) 20.b6 (20.Ba3 ab5 21.a6 Ba8 22.Bc5 Qc5+–) 20...Qd6 21.g4?? (better 21.Ba3+–) 21...f5 (21...Qf4! 22.Ke1 Qh2+=) 22.g5 (better 22.Ke1!? hg4 23.Ba3+–) 22...Qf4+= 23.Ke2 (better 23.Qf3!? Qh4 24.Qg3 Qg3 25.Kg3 f4 26.Kh2+= (26.Kf4? Rgf8 27.Kg3 Bd6 28.Kh4 Rf2–+)) 23...Qh2=+ 24.Kf1 d4 (better 24...Qh3 25.Ke1 Qh4 26.Ke2 f4–/+) 25.Nd2?? (25.cd4 Qh3 26.Ke1 e5+=) 25...Bg2 (better 25...de3 26.Qe2 Qf4 27.Ke1 Qf2 28.Kd1 Qg1 29.Ne1 Be4–+) 26.Rg2+= Qh3?? (better 26...Qh1 27.Rg1 Qh3 28.Ke2 d3 29.Kf2 Qh4 30.Kf3 f4=) 27.Nf3 (27.ed4 Qh1 28.Rg1 Qh3 29.Kf2 Qh4 30.Kg2 Bd6 31.Nc4 Qg3 32.Kf1 Qh3 33.Kf2 Qh4 34.Ke2 Qh2 35.Kd3 e5 36.de5 Qh3 37.N4e3 Be5 38.Nd4 Rge8+–) 27...d3 (27...de3 28.Qe2 f4 29.Ba3+–) 28.Ncd4 Rd6 29.Raa2 (better 29.Ra4!? Kb8 30.Kf2 f4 31.Rc4 Rc8 32.Qd3 e5+–) 29...Kb7 30.Kg1 e5 (30...Rc8 31.Ra4+–) 31.Rh2 (better 31.Ne5 Qh4 32.Nc4+–) 31...Qg3 (31...Qg4 32.Kf2 Bd4+–) 32.Rag2 (32.Rag2 ed4 33.Rg3 de3 34.Nd4+–) 1–0. patrick317 – warrior23, gameknot.com, 2018.

2.d4 c6 3.e4 e6 4.d5 (4.a4 Bb4 5.c3 Bf8+=) 4...e5 (better is 4...ed5!? 5.ed5 Bb4 6.c3 Bc5–/+) 5.dc6 d6? (better is 5...Bb4 6.c3 Be7=) 6.Bc4?? (6.Bb5!? Qc7+–) 6...a6?? (better is 6...bc4 7.Qd5 Qc7–+) 7.Bd5 (7.Bf7!? Kf7 8.c7 Qc7 9.Qd5 Ke8 10.Qa8=) 7...Qc7+/– 8.Bd2 Nf6 9.f3 Nc6 10.c3 (better is 10.Nc3!?=) 10...Nd5–/+ 11.ed5 Ne7 12.Be3 Qc4 13.Ne2 Nd5 14.Nd4?? (better is 14.Qd2–+) 14...Ne3 15.Qd2 Nd5 (better is 15...ed4 16.Kf2 Nd5 17.Re1 Be7 18.cd4 Qb4 19.a3 Qd2 20.Nd2–+) 16.Na3 (16.Ne2–+) 16...Qc7 (better is 16...Qc3 17.Qc3 Nc3 18.Ne2–+) 17.g4 (17.Ndb5 ab5 18.Nb5–+) 17...ed4 18.cd4 Qe7 19.Qe2 (19.Kd1 Qf6 20.Ke2 Bb7–+) 19...Qe2 (19...Nb4!? 20.h4–+) 20.Ke2 g5 21.Rac1 (21.Nc2 h5 22.h4 hg4 23.hg5 Rg8–+) 21...Bg7 (21...Nb4 22.h4 gh4 23.Rh4–+) 22.Kd1 (22.Nc2 h5 23.h4 gh4–+) 22...Bd4 23.Rc6 Be5 24.Re1 Kd7 25.Rc2 Nb4 26.Rd2 Ke6 27.Rde2 Kd5 28.Re4 Re8 29.Rb4 Bc3 30.Rbe4 Re4 31.Re4 Bb7 32.Re3 Be5 33.Nb1 Kd4 34.Kd2 Bf4 35.Ke2 Be3 36.Na3 Re8 37.Nc2–+ Kc3 38.Ne3 Kb2 39.Kf2 Ka2 40.Nf5 Rd8 41.Nh6 b4 42.Nf7 Rf8 43.Nd6 Rf3 44.Kg2 Rd3 45.Nb7 b3 46.Nc5 Rd2 47.Kf1 b2 48.Ke1 Rc2 (48...Rc2 49.Nd3 b1Q 50.Nc1 Qc1; 48...Rh2 49.Nd3 b1Q 50.Nc1 Qc1) 0–1. desjostedt – donsjostedt (1670), net–chess.com, 2013. (=1.d4 b5 2.b4 c6)

2.d4 Nc6 3.d5 (better is 3.a4!? ba4 4.b5+=) 3...Nb4+= 4.e4 Bb7 (4...c6 5.c3 Na6 6.dc6 dc6 7.Qd8 Kd8 8.Nf3=) 5.c3= Na6 6.Be3 (6.Bb5 c6 7.Bc4 Nc5=) 6...Nf6 (6...c6 7.a4 Nc7 8.ab5 Nb5 9.Qb3=) 7.Nf3 (7.a4!?=) 7...Ne4+= 8.Bb5 e6 9.0–0 (better is 9.de6 fe6 10.Ne5+=) 9...Bd5?? (better is 9...ed5 10.Ba6 Ba6 11.Qd5 Nf6 12.Qe5 Qe7–/+) 10.Ba6+– Qf6 (10...Bc5 11.c4 Qf6 12.cd5 Be3 13.fe3 Qa1 14.de6+–) 11.Bd4 Qe7 (11...Qh6 12.c4 Bc6 13.Bb5 Bb5 14.cb5+–) 12.Ne5 (12.c4 Bc6+–) 12...f6? (12...c5 13.c4 cd4 14.cd5+–) 13.Nf3 (13.Qh5 g6 14.Ng6 Qf7+–) 13...e5? (13...Qd6 14.Qe2+–) 14.Be3 (better is 14.Be5 c6 15.Bb7 fe5 16.Ba8+–) 14...h5?? (better is 14...Qe6+–) 15.Qd5 Rb8 16.Ba7 Rb2 17.Qa8 Qd8 18.Qe4 Bb4 19.cb4 d5 20.Qg6 Ke7 21.Nc3 Rb4 22.Bc5 Ke6 23.Ng5 Kd7+– 24.Qf7 Kc6 25.Qe6 Kc5 26.Rac1 Qd6 27.Nce4 Kb6+– 28.Nd6 Ka6 29.Nc8 Ka5 30.Qd5 Rb5 31.Rc5 Rc8 32.Rb5 Ka6 33.Qb7 1–0. calchess10 – chess blues, ChessWorld.net, 2010.

2.d4 d5 (--> 1.b4 d5 2.d4 b5).

2.d4 e5 3.de5 Bb4 4.c3 Bc5? (4...Ba5 5.Qd5 c6 6.Qd3=) 5.e3?? (better is 5.Qd5 Bf2 6.Kf2+–) 5...Bb7 6.f3 (better is 6.Qg4 Ne7 7.Qg7+=) 6...Nc6 7.Ne2 Ne5 8.f4 Ng4 9.h3 (9.Ng3 Qh4 (9...Ne3 10.Be3 Be3 11.Qe2+/–) 10.Qe2 Nh2–+) 9...Ne3 10.Be3 Be3 11.Qd3 Qe7 12.Qb5 Bc6 13.Qe5 Qe5 14.fe5 Ne7 15.Rh2? 0–0 16.a4 Ng6 17.a5 Ne5 18.g4 Nf3 19.Kd1 Nh2 20.Ng3 Bf4 21.Ra2 Bg3 22.Be2 Rab8 23.a6 Rb1 24.Kc2 Rfb8 25.Bd3 Bf4 26.Bh7 Kh7 27.Kd3 Re8 28.Re2 Bb5 29.c4–+ Bc4! 30.Kc4 Re2 (30...Re2 31.Kd3 Rd2 32.Kc3 d5 33.g5 Nf3 34.g6 Kg6 35.h4 Be5) 0–1. ashipham (1835) – pawnraider (2290), net–chess.com, 2013. (=1.d4 b5 2.b4 e5)

2.d4 Nf6 3.Bb2 Nc6 4.e3 g6 (4...Nb4 5.Ba3 Nbd5 6.Bb5=) 5.Bb5 (5.a3 a6+=) 5...Bg7 (better is 5...Nb4!? 6.a3 Nbd5=) 6.Bc6 dc6 7.Nf3 Ne4 (7...Rb8 8.a3+/–) 8.0–0 0–0 9.Nbd2 Nd2 10.Qd2 Bb7 11.c3 (11.Qc3 h6+–) 11...Ba6 (11...c5 12.bc5 Rb8 13.Rfd1+/–) 12.Rfd1 e6 13.Qe2?? (better is 13.e4+–) 13...Be2–+ (14.Rd2 Bf3 15.gf3 Qg5 16.Kh1 Qh5–+) 0–1. Neffgen,Dieter – Pieleck,Kerstin, RSX9E – A00 – Sokolsky–1, 2002.

2.d4 h6 3.e4 a6 4.Bb2 d5 5.ed5 Nf6 6.c4 Bg4 7.f3 Bf5 8.cb5 ab5? (better is 8...Nd5!? 9.Qd2 ab5 10.Bb5 c6=) 9.Bb5+/– Nbd7 (better is 9...Bd7!? 10.Bc4 Ba4+/–) 10.Nc3 g5 11.Nge2 h5 12.Ng3 Bg6 13.Nge4 Ne4 14.fe4 Rb8 15.e5 f5 (15...e6 16.Qa4 h4+–) 16.Qd3 Rb5 17.Qb5 f4 (17...Qb8 18.e6 Qb5 19.Nb5+–) 18.e6 Bg7 19.Qc6 Bd4 (19...0–0 20.Qd7 Qd7 21.ed7 Rd8+–) 20.ed7 Qd7 21.Qg6 Kd8 22.Qg5 Bc3 (22...Qd6 23.a3 Qh6 24.Qh6 Rh6 25.0–0–0 Be3 26.Kc2+–) 23.Bc3 Rf8 24.0–0 Qg4 25.Qg4 hg4 26.Be5 f3 27.gf3 gf3 28.Rac1 f2 29.Rf2 Rf2 30.Kf2 Kd7 31.Rc7 Kd8 32.b5 e6 (32...Ke8 33.d6 Kf7 34.de7 Kg6 35.e8Q Kg5 36.Rg7 Kf5 37.Bd4 Kf4 38.Qe5) 33.d6 (33.de6 Ke8 34.Bf6 Kf8 35.Rc8) 33...Ke8 34.b6 Kd8 (34...Kf8 35.b7 Ke8 36.b8Q) 35.b7 Ke8 36.b8Q 1–0. pumpkin (2405) – valerypavlovich (2100), net–chess.com, 2013.

2.e3 Nc6 3.a3 Nf6 4.c4 bc4= 5.Bc4 d5 (5...a5 6.b5 Ne5 7.Bf1=) 6.Bb3 (6.Bb5 Bd7=) 6...e5 7.d3 g6 (7...Bd6 8.Qc2 Bd7 9.Nf3=) 8.Nf3 (8.Bb2 Qd6 9.Nf3+–) 8...Bg7 (8...e4 9.de4 de4 10.Qd8 Nd8 11.Bb2+=) 9.0–0 (9.Ba4!? Bd7 10.Qc2+–) 9...0–0 10.Bb2 e4 11.de4 de4 12.Ng5 (better 12.Qd8 Nd8 13.Nd4+=) 12...Be6?? (better 12...Qd1 13.Rd1 h6=) 13.Ne6 (13.Be6 fe6 14.Ne6 Qd1 15.Rd1 Rfe8 16.Ng7 Kg7+–) 13...Qd1 14.Rd1 (worse 14.Bd1 fe6 15.Bb3 Nd5 16.Bg7 Kg7+–) 14...fe6 15.Be6 Kh8 16.Nd2 Ng4?? (16...Rae8 17.Bb3 Ne5+–) 17.Bg7 Kg7 18.Bg4 Ne5 19.Be6 Rae8 (19...Rfe8 20.Bd5 Rad8 21.Ne4+–) 20.Bd5 Nd3 (20...Rd8 21.Ne4 c6 22.Bb3+–) 21.Ne4 Nb2 (21...Ne5 22.Nc5 Rf6 23.Rac1+–) 22.Rdc1 (better 22.Rd4 c6 23.Bc6 Rd8+–) 22...Nd3 (22...Re7 23.Nc5 Rf6 24.b5+–) 23.Rc7 Kh6 24.Nd6 Rd8 (24...Re5 25.Nf7 Rf7 26.Bf7 a5+–) 25.Rd1 (better 25.Nf7 Rf7 26.Bf7 a5 27.ba5 Ne5+–) 25...Nb2 (25...Nf2 26.Rd4 Rd6 27.Ra7 Ng4+–) 26.Rd2 Rd6 27.e4 (27.f4!? Rfd8 28.Bg8 g5+–) 27...Na4 28.Rdc2 (28.h4!? Nb6 29.Bg8 Rd7 30.Rdd7 Nd7 31.Rd7 Rg8 32.Ra7 g5+–) 28...a6 (28...Nb6 29.Ra7 Nd5 30.ed5 Rd5 31.f3+–) 29.Bb7 (better 29.Ra7+–) 29...Rd1 0–1. Goldmund,Heike – Jerez,Miriam, FICGS, 2016.

2.e4 Na6 3.Nc3 c5 4.Bb5 (4.bc5!? b4 5.Ba6 Ba6 6.Nd5+=) 4...cb4= 5.Ba6 bc3 (better is 5...Ba6 6.Nce2 Bb7+=) 6.dc3?? (better is 6.Bd3+=) 6...Ba6–+ 7.Bg5 f6 8.Bf4 g5?? (8...Bc4 9.Nf3–+) 9.Be3 Bh6 10.Nf3 g4 11.Nh4 Qa5 12.Bd4 Bg5 13.Nf5 Nh6 14.Ng7?? Kf7 15.Nh5 Bc4 16.Nf4?? Bf4 17.e5 fe5 18.Be5 Qe5 19.Qe2 Qe2 0–1. interloper – nickb, ChessWorld.net, 2012.

2.e4 c5 3.bc5+/– d5 (3...Qa5 4.Qe2+/–) 4.f3 (better is 4.Bb5!? Bd7 5.Bd7 Nd7 6.ed5 Nc5 7.Nc3+–) 4...b4 5.a3 e5 (5...ba3 6.Ba3 Nf6 7.e5+/–) 6.d4 (6.ab4 de4 7.Nc3+–) 6...f5? (better is 6...ba3!? 7.ed5 Qd5+/–) 7.ab4 a5 (7...de4 8.d5+–) 8.c3 (8.de5 de4 9.Qd8 Kd8+–) 8...f4? (8...de4 9.Qa4 Bd7 10.Bb5+–) 9.h4 (9.Bb5 Bd7 10.Bd7 Nd7 11.ed5 ab4 12.Ra8 Qa8+–) 9...g5 (9...Be7 10.Bb5 Bd7 11.Bd7 (11.ed5 Bh4 12.Kd2 Bb5–/+) 11...Nd7 12.ed5 ab4 13.Ra8 Qa8 14.d6+–) 10.hg5 (better is 10.ed5 Qd5 11.hg5 Ne7+–) 10...h5? (10...de4 11.Qc2 Bb7 12.Bb5 Ke7 13.de5 ab4 14.Ra8 Ba8 15.cb4 Bg7 16.Bf4 Qc7+–) 11.de5 Qg5 12.Nh3 Bh3 13.gh3 Qg3 14.Ke2 de4 15.fe4 f3+/– 16.Kd2 Be7?? 17.Rg1 Bg5?? 18.Kc2+– Qf2 19.Nd2 Bd2 20.Bd2 Nc6 21.Bb5 Nge7 22.Rf1 Qh4 23.Rf3 Qe4 24.Kc1 0–0–0 25.ba5 Rd2 26.Kd2 Rd8 27.Rd3 Ne5 28.Rd8 Kd8 29.Kc1 Kc8 30.Qh5 (30.Qh5 Nd5 31.Qh8 Kc7 32.Qg7 Kb8 33.Qg3+–) 1–0. ShadoWarrior02 – SouEu, playchess.de, 2002.

2.e4 d5 3.ed5 (3.Bb5 c6 4.Bd3 Qd6+/–) 3...Qd5 4.Nc3 Qe5 (4...Qe6 5.Qe2 a6 6.Qe6 Be6 7.Nf3+=) 5.Qe2 Qe3?? (better is 5...Qe2 6.Be2 a6+=) 6.de3 (6.Qe3 Nf6 7.Nb5 Na6+–) 6...Nf6 (6...a6 7.a4 e6 8.Bb2 ba4 9.Qf3+–) 7.Nb5 Bd7 8.Nc7 Kd8 9.Na8 Nc6 10.Qa6 e6 11.a3 Nd5 12.b5 Nb8 13.Qa7 Bd6 14.Bb2 f6 15.c4 Ne7 16.Qb6 Ke8 17.Qd6 Kf7 18.Nb6 Rd8 19.c5 Nd5 20.Nd5 ed5 21.Qd5 Ke7 22.Bc4 Bb5 (22...Rg8 23.Qd6 Kd8 24.Qb8 Ke7 25.Qd6 Ke8 26.Rd1 Rh8 27.Qd7 Kf8 28.Qf7) 23.Qf7 1–0. Fournier,Frederic (2080) – NN, Active, 2004. (=1.e4 b5 2.b4)

2.e4 g6 3.Bb5 (3.Bb2 Nf6+/–) 3...Bg7 4.d4 (4.Nc3 Bb7 5.d4 f5+/–) 4...c6 (4...c5 5.Nf3 cb4 6.c3+=) 5.Bc4 (5.Be2 a5+/–) 5...e6 (5...d5 6.ed5 cd5 7.Bb5 Bd7 8.a4+/–) 6.e5 h5 (6...d6 7.Nf3+/–) 7.Nf3+– Ne7 (7...a5 8.b5+–) 8.0–0 (8.Nbd2 d5 9.ed6 Nf5+–) 8...d5 9.ed6 (9.Bd3 Qb6+–) 9...Qd6 10.c3 Ba6 (10...Nd5 11.Nfd2+–) 11.Na3 Bc4 12.Nc4 Qd8 13.Re1 0–0 14.Bf4 Na6 15.Qd3 Qd7 16.Qe4 Qd5 17.Nd6 Qf5?? 18.Nf5 Nf5 19.Qc6 Nb4 20.cb4 Rac8 21.Qe4 Rc4 22.Be5 Rb4 23.Bg7 Kg7 24.Qe5 f6 25.Qe6 Nd4 26.Qe7 Rf7 27.Qb4 Nf3 28.gf3 g5 29.Re7+– Kg6 30.Rf7 Kf7 31.h4 g4 32.fg4 (32...Kg7 33.Rd1 Kg6 34.Qe4 f5 35.Qe8 Kf6 36.g5 Kg7 37.Rd7; 32.Rd1 Kg7 33.Rd7 Kh6 34.Qe7 g3 35.Qf6) 1–0. renegade – LAME WOLF, internet, 2005.

2.f3 a5 3.ba5 e5 4.e3 =+.

2.f3 c6 3.c3 (3.a4 e5=) 3...Nf6 (3...a5 4.ba5 e5 5.e4=+) 4.d4 (4.a4 d5=) 4...e6 (4...a5 5.ba5 d5 6.Nd2 Qa5 7.Nb3–/+) 5.e4 (5.a4 ba4 6.e4 Be7+=) 5...Be7 (5...a5 6.ba5 Qa5 7.a4=+) 6.e5 (6.a4!?+=) 6...Nd5= 7.Ne2 (7.a4 ba4 8.Ra4 d6=) 7...f6 (7...a5 8.ba5 d6 9.ed6 Bd6 10.Nd2–/+) 8.Ng3 (better is 8.a4=) 8...g5?? (better is 8...a5 9.ba5 Qa5–/+) 9.f4 (9.a4 fe5 10.ab5 cb5+=) 9...gf4 (9...0–0!? 10.ef6 Bf6 11.fg5 Bh8+= (11...Bg5? 12.Qg4 h6 13.Ne4+–)) 10.Qh5+/– Kf8 11.Qh6 Kg8 12.ef6 Nf6? 13.Bf4+/– Bf8? 14.Qg5+– Bg7 15.Be5?? h6+/– 16.Qg6 d6 17.Bf4 Nd5?? 18.Nh5+– Nf4 19.Qg7 (19.Nf4?! Qe7 20.Be2 e5+=) 1–0. Mokolato – jordan2delta, internet, 2006.

2.Nf3 a6 3.Nc3 Ra7 4.g4 (4.a4 e6=) 4...Rb7 (4...e5 5.Ne5 Bb7 6.e4=) 5.Ne5 (5.e4 e6 6.a3 d5=) 5...Rb6 (5...d6 6.Nf3=+) 6.Nd5 Rd6 (6...Bb7 7.e4 Bd5 8.ed5=+) 7.e4 (7.Bg2!?=) 7...Re6=+ 8.Nf3 (better is 8.Nd3!? Bb7 9.Nc3 Be4 10.Ne4 Re4 11.Be2–/+) 8...Re4–+ 9.Be2 Rg4 (better is 9...Bb7 10.Ne3 Rb4–+) 10.Bb2? (better is 10.Bd3 e6 11.h3–/+) 10...Rg1?? (better is 10...Bb7 11.Ne3 Rb4–+) 11.Rg1+– Bb7 12.Nh4 (better is 12.Ne3 Nf6 13.a4 ba4 14.Ra4+–) 12...Bd5 13.Rg5?? (better is 13.Nf5 e5 A) 14.Rg7 Qf6 15.f4 Qf5 (15...Bg7?! 16.Be5 Qf5 17.Bg7–/+) 16.Be5 f6 (16...Bg7?! 17.Bg7 Qf4 18.Bh8–/+) 17.Bc7 Bg7 18.Bh5 Bf7 19.Bf7 Kf7 20.Bb8 Qe4 21.Kf2 Ne7–+ (21...Qb4 22.Qh5 Kf8 23.c3–+); B) 14.Be5+/–) 13...h6?? (better is 13...e6 14.Rg7 Qh4=+) 14.Rd5+– d6 15.Nf3 Qd7 16.Nd4 Qg4?? 17.Bg4 h5 18.Bh5 Rh6 19.Bg4 Rg6 20.Bf3 Rg1 21.Ke2 Rd1 22.Rd1 e6 23.Rh5 e5 24.Nb3 g6 25.Rh8 Bg7 26.Rg8 Ke7 27.Rg7 Nc6 28.Bc6 (28...Kf6 29.Rh7+–) 1–0. pthornton – jblake, net–chess.com, 2005.

2.Nf3 Nf6 (--> 1.b4 Nf6 2.Nf3 b5).

2.f4 d5 3.a4 c6 4.ab5 cb5 5.e3 Bd7 6.Nc3 Qb6 (better is 6...e6!?=) 7.Nd5+/– (7.Nd5 Qb7 8.Qf3+/–) 1–0. b4_player – jan, internet, 2013.

2.f4 e5 3.f5 (3.fe5 Bb4 4.Nf3 d5=) 3...f6 (3...d5!?–/+) 4.h4 (4.e4!? g6 5.Bb5 Bb4 6.c3=) 4...g6 (4...Bb4 5.e4=+) 5.h5 (5.e4 Bb4 6.Bb5 c6=+) 5...g5 (5...gf5!? 6.a4 a5 7.ab5 Bb4–/+) 6.e3 (6.e4 Bb7=) 6...Bb4 7.Bb5 Qe7 (7...c6 8.Be2=+) 8.Nc3 (better is 8.e4=) 8...Qe6?? (better is 8...c6 9.Bd3 d5=) 9.Kf1 (better is 9.fe6 c6 10.ed7 Bd7 11.Bc4+–) 9...Qf5–/+ 10.Nf3? (better is 10.Ke1–/+) 10...Qh3 (better is 10...e4 11.Ne4 Qb5 12.Kg1 d5–+) 11.Rh3+– g4 (11...c6 12.Bd3 g4 13.Rg3 gf3 14.gf3+–) 12.Nd5 Bd6 13.Rh4 gf3 14.Nc7! Bc7 15.Bd7! Kd7?? 16.Rd4 ed4 17.Qe2?? (better is 17.Qf3 de3 18.Qd5 (< 18.Qa8 Nc6=+) 18...Ke7 19.Qa8+–) 17...fe2–+ 18.Kg1 e1Q 0–1. phopwood – amiller, net–chess.com, 2002.

2.f4 e6 3.Nf3 (3.Bb2 A) 3...Bb4?? 4.Bg7 Nh6 5.Bh8+– (5.Bh6?! Qh4 6.g3 Qh6=); B) 3...Bb7=+) 3...Nc6 (3...Bb4!? 4.Bb2 Nf6=+) 4.a3= d5 5.e3 a6 6.Bb2 Nf6 7.h3 Ne4 8.Qe2?? (better is 8.Rg1=) 8...Ng3–+ 9.Qd3 Nh1 10.Ne5 (10.g4–+) 10...Qh4 11.Kd1 Nf2 12.Ke2 Nd3 13.g3 Qg3 14.Kd3 Ne5 15.fe5 Bb7 16.a4 Bb4 17.ab5 a5 18.Ba3 Qe5 19.Ra2 Ba3 20.Na3 0–0–0 (21.c3 Kd7–+; better is 20...d4 21.Nc4 Be4 22.Ke2 Qh2 23.Kd1 Bf3 24.Kc1–+) 0–1. gengar – erch, ChessWorld.net, 2005.

2.g3 a5 3.Bg2 c6 (3...Nc6 4.c4 Rb8 5.cb5 Rb5 6.ba5=) 4.Nf3 (4.ba5 Nf6=) 4...d5 (4...ab4 5.0–0–/+) 5.Nd4 (better is 5.ba5!? Nd7 6.Bb2=) 5...ab4 6.0–0 g6 (6...e5 7.Nb3–/+) 7.d3 (better is 7.Bb2!? e5 8.Nb3–/+) 7...Bg7–+ 8.Bb2 (better is 8.c3 bc3 9.Nc2–+) 8...c5?? (8...Qb6 9.e3 c5 10.Bd5–+) 9.Bd5?? (better is 9.Ne6! Bb2 10.Nd8+/–) 9...Qd5–+ (9...Bd4 10.Bd4 Qd5 11.Bh8+/–) 10.Nb5 (10.Ne6 Be5 11.Nc7 Bc7 12.e4–+) 10...Na6?? (10...Kf8 11.Nc7 Qc6 12.Bg7 Kg7 13.Na8–+) 11.c4?? (11.Bg7 Bh3 12.e4+–) 11...Qb7?? (better is 11...bc3 12.N1c3 Qc6–+) 12.Bg7+– Bh3 13.Re1 (better is 13.f3 Bf1 14.Qf1+– (14.Bh8?! Bh3+/–)) 13...Qg2 0–1. solidsteelpipe – PoetPrince, Live Game Caissa's Web, 2005.

2.g3 e5 3.Bg2 Nc6 (3...d5 4.a4=) 4.Bc6 (better is 4.a4!? Rb8 5.ab5 Rb5 6.c3=) 4...dc6–/+ 5.e3 (5.Bb2 f6–/+) 5...Nf6 (5...Bb4 6.Bb2–+) 6.Nc3 (6.a3!?–/+) 6...Bb4–+ 7.Nge2 (7.Qf3 0–0 8.Nge2 Qe8–+) 7...Bc3 (7...Bg4 8.Bb2–+) 8.dc3 (8.Nc3 b4 9.Ne2–+) 8...Qd1 9.Kd1 Bg4 10.Ba3 (10.Ke1 Bf3 11.Rg1 Ng4–+) 10...Be2 (better is 10...Bf3 11.Rf1 Rd8 12.Ke1 Ng4–+) 11.Ke2 Ne4 12.Bb2 0–0 (12...Nd6 13.Rhd1–+) 13.f3 Nf6 14.Rad1 h6 15.Rhe1 Rfe8–/+ 16.Kf2 c5 17.f4 Ng4 18.Kf1? Nh2 19.Kg2 Ng4 20.Rd7? c6 21.Rc7 Rec8 22.Rc8 Rc8 23.fe5 Ne5 24.c4 Nc4 25.Ba1 f5 26.e4 Re8 27.Bc3 fe4 28.Kh3 e3 29.Kg4 Kf7 30.Kf3 b4 31.Ba1 g5 (32.Ke2 Rd8–+; 31...Rd8 32.Ke4–+) 0–1. oracleinshadows (1725) – iboyd (1950), net–chess.com, 2006.

2.g4 Bb7 3.f3 a5 (3...e5 4.h4 Bb4 5.e4–/+) 4.Nc3 (better is 4.e4!?–/+) 4...ab4 5.Nb5 (5.Ne4 e5 6.Ng3 Nc6–+) 5...Na6 (5...e5 6.e4 c6 7.h4–+) 6.Nh3 (6.Bb2 d6 7.e3 e5–+) 6...c6 (better is 6...e5–+) 7.Nd4=+ c5 8.Nb3 (8.Nb5=+) 8...g6 (better is 8...c4 9.Nd4 e5–/+) 9.Nf4?? (better is 9.Bb2 f6 10.e3=) 9...Bg7 (9...e5 10.Ng2 c4 11.Bb2 cb3 12.ab3–+) 10.Nd3? (better is 10.Rb1–/+) 10...Nf6?? (better is 10...c4 11.Bb2 A) 11...cd3? 12.Bg7 e6 13.Bg2 (13.ed3?! h5+/–) 13...Qh4 14.Kf1+–; B) 11...Bb2 12.Nb2 cb3 13.ab3 e5–+) 11.Ndc5= Qb8 12.Bb2 Qc8 13.g5 Nd5?? 14.Bg7+– Rg8 15.Be5 Nc5 16.Nc5 Qc5+/– 17.Rb1 Ra2= 18.c4 Qc4 19.e4+– Qc6 20.ed5 Qd5 21.Rb4?? Qe5–+ 22.Kf2 Qf5 23.Rb7+– Qc5 24.Kg2?? f6 25.h4 fg5? 26.Bb5?? Qc2?? 27.Rd7 g4 28.Qe1 Rg7 29.Re7 Kf8 30.Re8 Kf7 31.Qe7 (31.Qe6 1–0. mooney – preynolds, net–chess.com, 2006.

2.g4 Nf6 3.Bg2= c6 4.h3 e6 5.c3 d5 6.h4 (6.a4!?=+) 6...Ng4–/+ 7.f3 (7.a4!?–/+) 7...Nf6–+ 8.Rh3 (8.a4 Qc7–+) 8...Nh5 9.d3 Nf4?? (better is 9...Be7 10.e3 e5–+) 10.Bf4+= g6? (better is 10...e5!? 11.Bg5 f6+=) 11.Bg5 Be7 12.Bf4?? Qb6?? 13.Bg3?? Qg1–/+ 14.Bf1 Qe3 15.Rh1 f5 16.Rh2 f4?? 17.Bf2+– Qe5 18.h5?? g5?? 19.d4 Qf6 20.Nd2 e5 21.Qb3? e4 22.fe4=+ f3 23.ed5 fe2 24.Be2 Bd6 25.Nf3?? Bg4–+ 26.Qc2? Bf3 27.Bf3 Bh2 28.Qe2 Kf7 29.Qf1 Qf3 30.Rd1 Re8 31.Kd2 Bf4 32.Kc2 Re2 33.Rd2 Rd2 34.Kb1 Rf2 35.Qe1 Re2 36.Qg1 Na6 37.dc6 Rae8 38.Qd1 Re1 39.Kb2 Rd1 (40.d5 Re2 41.Kb3 Qd5 42.c4 Qd3 0–1. Hansen,Joern – Adler,Bernd, remoteschach.de, 2003.

2.a3 a6

3.Bb2 (--> 2.Bb2 a6 3.a3).

3.Nc3 Nf6 4.e4 e5 5.Nge2 h6 (5...a5 6.ba5 (6.Nb5? c6–+) 6...Ra5 7.d4+=) 6.Bb2 Bb7 7.f3 (7.Ng3 Nc6=) 7...Nc6 (7...c5 8.Nd5 Nd5 9.ed5+=) 8.g4 (8.Ng3 h5=) 8...g5 (8...Bd6!?–/+) 9.d4= d6 (9...d5!?=) 10.d5+= Ne7 11.Bh3 h5 12.Rg1 (12.Qd3+=) 12...h4?? (better is 12...hg4!? 13.Bg4 Rh2–/+) 13.a4 c6 14.a5?? (better is 14.dc6 Nc6 15.ab5 Nb4 16.Qd2=) 14...cd5–+ 15.Qd3 d4 16.Nd4 ed4 17.Qd4 Bg7 (17...Nc6!? 18.Qb6 Qb6 19.ab6 Nb4 20.Nb5 Nc2 21.Ke2 Na1 22.Nc7 Ke7 23.Na8–+) 18.0–0–0 0–0 19.Qb6? (19.Qd6 Nc6–+) 19...Qb6 20.Nd5 (20.ab6 Nc8 21.Ne2–+) 20...Bd5 (better is 20...Qf2 21.Ne7 Kh7–+) 21.Bf6 (21.ab6 Be6 22.b7 Rab8 23.Rd6 Rb7 24.Ra6 Rc8–+) 21...Bf6 (21...Qe3 22.Rd2 Rac8 23.ed5 Qg1 24.Rd1 Rc2 25.Kc2 Rc8 26.Kd2 Qf2 27.Kd3 Qc2 28.Ke3 Nf5 29.gf5 Re8 30.Be5 Re5 31.Kd4 Qc4) 22.ed5 (22.ab6 Bc6 23.f4 gf4 24.Rd6–+) 22...Bc3 (22...Bc3 23.ab6 a5–+) 0–1. nimzou (1725) – valerypavlovich (2100), net–chess.com, 2015.

3.d4 Nc6 4.e3 f6 5.Nf3 Rb8 6.Be2 d5 7.Nc3 e6 8.0–0 Bd6 9.Re1 e5 (better is 9...Nge7+=) 10.Qd2?? (10.de5 fe5 11.Qd5 Bb7+–) 10...Bf5?? (better is 10...e4!? 11.Nh4 g5 12.Bh5 Kf8+=) 11.Nh4 (better is 11.de5 Be5 12.Ne5 Ne5 13.f4+/–) 11...g6? (better is 11...Be6 12.e4 ed4 13.Nd5 Nge7+=) 12.Nf5+– gf5 13.Nd5 Qd7 14.Bh5 Kd8 15.c3 Nh6 (15...ed4 16.f4 dc3 17.Qc3 Nce7 18.Nf6 Qc6 19.Qc6 Nc6+–) 16.Nf6 Qf7?? (16...Qg7 17.e4 Nf7 18.Bf7 Qf7 19.de5 Ne5+–) 17.Bf7 Nf7 18.de5 Nfe5 19.Qd5 (19.Qd5 Ke7 20.Nh5+–) 1–0. pieeater – horsehold, ChessWorld.net, 2013.

2.a3 Bb7

3.Bb2 (--> 2.Bb2 Bb7 3.a3).

3.Nc3 a6 4.e4 Nc6 5.Nf3 e5 6.Be2 Nd4 (6...Nf6 7.0–0=) 7.Nd4 (7.Ne5!? Qg5 8.Ng4+=) 7...ed4= 8.Nd5 Bd5 9.d3?? (better is 9.ed5 Qf6 10.Bb2+=) 9...Bb7–+ 10.0–0 Qf6 11.Bf3 c6 12.Re1 Qe5 13.g3 Be7 14.Bf4 Qe6 15.Bg4 f5! 16.ef5 (16.ef5 Qf7 Decoy; 16.Bf5 Qf7 Decoy) 16...Qf7 17.Bd6 (17.Be5 Kf8–/+) 17...h5 18.Bh3 0–0–0 19.Be7 Ne7 20.a4 Nd5 21.ab5 cb5 22.Re5 (22.Qd2 Rde8–+) 22...Rhe8 23.Re8 Re8 24.Kg2 (24.Qd2–+) 24...Ne3 25.Kg1 Nd1 26.Rd1 (26.Bf1 Qd5 27.f3 Qf3 28.Rd1 Qe3) 26...Bf3 27.Ra1 Kb7 28.Rc1 Bg4 29.Bg2 d5 30.h3 Bf5 31.Kh2 Re2 32.f4 Qe7 33.c3 Rg2! 34.Kg2 Qe2 35.Kg1 Qe3 (35...Qe3 36.Kg2 Qd2 37.Kh1 Qc1 38.Kg2 Bh3 39.Kh2 Qf1 40.c4 Qg2; 35...Bh3 36.Rc2 Qc2 37.c4 Qg2) 0–1. pieeater – xorb, ChessWorld.net, 2012.

3.e3 d6 4.Bb5+– Nc6 (4...Nd7 5.Nf3+–) 5.Bb2 Nf6 6.Nf3 a6 7.Bc4 (7.Ba4 Nd7+–) 7...d5 8.Ba2 e6 9.d4 Be7 (9...a5 10.b5 Na7 11.c4+–) 10.Nbd2 0–0 11.c4 Qd6 (11...dc4 12.Bc4 a5 13.b5+–) 12.0–0 Rfd8 13.c5 Qd7 14.Re1 Rab8 15.Qe2 Na7 16.Ne5 (16.Bb1 Qa4+–) 16...Qb5+– 17.Rad1 (better 17.Bb1+–) 17...a5? (better 17...Qe2!? 18.Re2 a5+–) 18.Qb5+– Nb5 19.ba5 (better 19.a4!? Na7 20.b5 Nd7 21.Nd7 Rd7+–) 19...Ra8 20.a4 Na7 (20...Ra5 21.Bb3 (worse 21.ab5 Ra2 22.Bc3 Ra3+–) 21...Na7 22.Bc3+–) 21.Bc3 Nc6? (better 21...Ba6+–) 22.Rb1 Rdb8 23.Nc6 (better 23.Rb7 Rb7 24.Nc6+–) 23...Bc6 24.Rb8 Rb8 25.Bb3?? (better 25.Rb1 Ra8 26.Bb3+–) 25...Ne4=+ 26.Rb1? (better 26.Bd5 ed5 27.Rb1=+) 26…Nc3–+ (26...Nc3 27.Rb2 e5 28.de5 Na4–+) 0–1. alddhsfd (1650) – Padiluv (1715), lichess.org, 2019.

2.a3 c6

3.Bb2 Nf6 4.e3 a5 5.c3 a4 (5...ab4 6.cb4 e6 7.Nf3=) 6.Nf3 d5 7.Be2 e6 8.0–0 Bd6 9.Re1 Nbd7 10.d3 0–0 11.d4 Nb6 12.Nbd2 Ne4 13.Ne4 de4 14.Ne5 Bb7 15.Bg4 Nc4?? (better is 15...Be5 16.de5 Nc4–/+) 16.Nc4+= Bc7?? (better is 16...bc4 17.Be2 Qg5+/–) 17.Nd2+– Qd5 18.Qe2 e5 19.de5 Qe5 20.g3 g6 21.Rad1 h5 22.Bh3 h4 23.Nf1 g5 24.c4 Qd6 25.Rd6 Bd6 26.Qh5 f6 27.Be6 Rf7 28.Qf7 Kh8 29.Bf6 1–0. pieeater – WirralBoy, ChessWorld.net, 2012.

2.a3 Nc6

3.Bb2 Bb7 4.e4 e5 5.Nf3 Qf6 (5...a6!?+=) 6.Nc3 1–0. pieeater – West Islander, ChessWorld.net, 2012.

3.Bb2 e5 4.e3 Nf6 (4...a6 5.c4 bc4 6.Bc4=) 5.Nf3 (5.Bb5 Bb7+/–) 5...d6? (5...e4 6.Nd4 Nd4 7.Bd4=) 6.d3 (better is 6.Bb5!? Bd7 7.0–0+/–) 6...Bg4 7.Be2 Be7 8.0–0 0–0 9.h3 Be6 10.Nbd2 a5 11.ba5 Na5 12.c4 bc4 13.Nc4 Nc4 14.dc4 c5 15.Qc2 e4 16.Nd2 d5 17.cd5 Qd5 18.Rfd1 Qg5 19.Kh1 Bd6?? 20.Ne4 Ne4+/– 21.Qe4 Rae8?? 22.Rd6+– f5 23.Qf3 f4 24.ef4 Rf4 25.Qg3 Qg3 26.fg3 Re4 (26...Re4 27.Bb5 Rb8+–). Fournier,Frederic (2000) – luisito84 (1865), Echecs21, 2003.

2.a3 e6

(--> 1.b4 e6 2.a3 b5).

3.Bb2 f6 (--> 1.b4 e6 2.Bb2 f6 3.a3 b5).

2.a3 Nf6

3.Bb2 (--> 2.Bb2 Nf6 3.a3).

3.e3 a6 4.Nf3 Bb7 5.Bd3 Nc6 6.0–0 e5 7.e4 Be7 8.Re1 0–0 9.c4 bc4 10.Bc4 d6 (10...Ne4 11.Nc3 Nc3 12.dc3+=) 11.d3 Nd4 12.Nc3 Qd7 13.Be3 Nf3 14.Qf3 Bc6 15.Bg5 (15.Nd5 Nd5 16.ed5 Bb5+=) 15...Ne8 (better is 15...Ne4!? 16.de4 Bg5+=) 16.Be7 Qe7 17.Nd5 Bd5 18.Bd5 Rd8 (18...Rb8 19.Bc6+=) 19.Rac1 (19.Bb7 a5 20.ba5 Qg5+/–) 19...h6 (19...c5 20.bc5 dc5 21.Qe3+=) 20.a4 (20.Qe3!?+/–) 20...c5+= 21.bc5 dc5 22.Qf5 Nd6 23.Qg4 Rc8 (23...Ne8 24.Qg3=) 24.g3 (24.Re2 Rfd8+=) 24...g5 (24...Rfd8 25.f4=) 25.Kg2 a5 26.h3 Kg7 27.h4 f5 28.ef5 Nf5 29.Kh3 Kh8 30.Be4 Nd6= 31.f3 Ne4 32.de4 gh4–/+ 33.gh4 Rg8 34.Qh5+= Qe6 35.Kh2?? c4 36.Rb1 c3–+ 37.Rbc1?? Qa2 38.Kh1 Qg2 0–1. pieeater – Mark_Peck, ChessWorld.net, 2012.

2.a4 Na6

3.ab5 Nb4 (--> 2...Nc6 3.ab5 Nb4).

2.a4 c5

3.bc5 ba4 4.Ra4 (4.d4 Bb7+–) 4...e5 5.Bb2 (5.Nf3 Qc7+=) 5...Bc5 (5...Nc6 6.Nf3 Bc5 7.Be5 Ne5 8.Ne5+=) 6.Be5+– Nf6 7.e3 (7.d4 Be7+–) 7...Nc6 (7...d6 8.Bb5 Nbd7 9.Bf6 Qf6 10.d4+–) 8.Bf6 (8.d4 Bb4 9.c3 Be7+–) 8...Qf6 9.Nc3 d5 (better 9...0–0!?+–) 10.Nd5+– Qe5 11.Qf3 (11.Bc4 Bd6+–) 11...0–0 12.Bd3 (12.Nf6 Qf6 13.Qf6 gf6+–) 12...Be6 (12...Rd8 13.Nc3 Bd7 14.Be4+–) 13.Nc3 (better 13.Be4 f5 14.Ne7 Ne7 15.Ba8+–) 13...Nd4?? (13...Nb4 14.Be4 Rad8 15.d4 Bd4 16.ed4 Nc2 17.Kf1 Nd4 18.Qe3+–) 14.Qd1 (14.Qe4!? Qe4 15.Ne4 Bd7+–) 14...Bd7? (better 14...Nf5+–) 15.Rd4! Bd4 16.Nf3 (16.Nf3 Qc5 17.Nd4+–) 1–0. FeegLood (2500) – Perplexing (1920), lichess.org, 2017.

3.bc5+/– Qa5 4.e4 e5 5.Bb5 Bc5 6.Qh5 Qc7 7.Qg5 Bf8 8.Nc3 a6 9.Nd5+– Qc2 10.Qe5 Ne7?? 11.Ne7 Be7 12.Ba3 0–0 13.Qe7 h6 14.Qf8 Kh7 15.Be2 Bb7 16.Qf7 Be4 17.Rc1 Qc1 18.Bc1 Nc6 19.Bb2 Rg8 20.Nf3 Bg6 21.Qd7 (21...Nb4 22.Ng5 Kh8 23.Ne6 Nc2 24.Kd1+–) 1–0. Jung – Braun, Vereinsturnier Baden, 1991.

2.a4 d5

3.ab5+/– e6 4.e3 (4.c3 Bd6+/–) 4...Bb4+= 5.Bb2 (5.Qg4 Bf8+=) 5...Nf6= 6.Nf3 Nbd7 (6...0–0 7.Ne5=) 7.c3 (7.Be2 Bd6+=) 7...Be7 (7...Bd6 8.Ba3+=) 8.d4 Nb6 (8...Bb7 9.Ba3=) 9.Bd3+= a5 (better is 9...Bb7!?+=) 10.ba6+/– Nc4 (10...c5 11.dc5 Bc5 12.Ba3+/–) 11.Bc4+– dc4 12.Nbd2 (better is 12.Qa4!? Bd7 13.Qc4+/–) 12...Ba6+/– 13.Qa4 Nd7 14.Nc4 (14.Qc6 Qc8+=) 14...0–0 15.Ncd2 Bb7 (15...Bd3 16.Qa8 Qa8 17.Ra8 Ra8 18.Kd1=) 16.Qd1 Nf6 17.0–0 Ne4 (17...Ra1 18.Ba1 Qa8 19.c4+=) 18.Ne4 Be4 19.c4 Qb8 20.Ra8 Ba8 21.Qe2 (21.Bc3 Bf3 22.Qf3 Qb3+=) 21...Qb7 (21...Bf3 22.gf3 c5 23.Rd1+=) 22.Rc1 White plans c5 22...Bd6 (22...Rb8 23.Ra1+=) 23.c5+/– Be7 24.Qc4 0–1. Fournier,Frederic – Cadet,Yves, Active Game Noyon FRA, 1995.

3.ab5+/– Nf6 4.Ba3 (4.Nf3 e6+–) 4...e5 (4...a6 5.e3+=) 5.Nf3 a6 6.Ne5 (6.Bb2 e4 7.Nd4 Bb4=) 6...ab5 7.e3 (7.Nc3 c6 8.Bb2 Ra1 9.Qa1 Bb4=) 7...c6+= 8.Nc3 Bd6 9.f4 0–0 10.Be2 (10.Bd3 Qb6+=) 10...Bb7 11.0–0 Nbd7 12.Nf3 Nb6 13.Nd4 Re8 14.Qe1 Nc4 15.Bc4 bc4 16.Ra2 Ra6 (16...Qd7 17.Qe2=) 17.Qf2 (17.Qg3 Qd7=) 17...Qd7= 18.Rfa1 Rea8 19.Qe2 Ne8 (19...Bc8 20.Qe1=) 20.h3 (20.Qf1 Nf6=) 20...g6= 21.f5 (21.Qg4 Qg4 22.hg4 h6=) 21...Nf6 22.Qe1 Qc7 (22...Qe8 23.Qh4 Ne4 24.Ne4 Qe4 25.Qg5=+) 23.Qh4 (23.d3 Kg7=) 23...Nh5 (23...Ne4 24.Ne4 de4 25.c3= (25.Qe4?? c5 26.Nb5 Be4 27.Nc7 Bc7–+)) 24.Nf3 (24.Qg4 Nf6 25.Qg5 Ne4 26.Ne4 de4 27.fg6 hg6=) 24...Be7= 25.Qg4 Ng3 26.Nd4. Janek – Helot, internet, 2018.

2.a4 Nf6

3.ab5 Bb7 4.c3 e6 5.e3 d6 6.Nf3 a6 7.d4 Be7 8.ba6+/–.

3.ab5 Bb7 4.e3 e5 5.Nf3 e4 6.Ne5 Bb4 7.c3 Bc5 8.Be2 0–0 9.0–0 Re8 (9...a6 10.d4 Be7 11.ba6 Na6 12.Qb3=) 10.d4 ed3 11.Nd3 Bb6 12.Bf3 d5 13.c4 a6 14.c5 (14.Nc3 ab5 15.Ra8 Ba8 16.cb5 c6+=) 14...Ba7= 15.Na3 c6? (better 15...Ne4 16.c6 Bc8=) 16.b6+– Nbd7 (16...Bb6 17.cb6 Qb6 18.Bb2+–) 17.ba7 Ra7 18.Bb2 Bc8 (18...a5 19.Bd4+–) 19.Nc2 Ne4 20.Nd4 Qc7 (20...Nb8 21.Qc2+–) 21.Nf5 Ndc5 (21...f6 22.Bd4 Ra8+–) 22.Ng7 Re7 23.Nc5 Nc5 24.Nh5 Ne4 (24...Nd7 25.Bd5! Ne5 26.Nf6 Kg7+–) 25.Qd4 Qe5 26.Qe5 Re5 27.Be5 Bf5 (27...Re7 28.Bd4 f5 29.Rfc1+–) 28.Rfb1 Nd2 (28...f6 29.Be4 de4+–) 29.Rb8 Bc8 30.Rc8 1–0. DEFFM – GuestFTFR, freechess.org, 2018.

3.ab5 d5 4.e3 e6 5.c3 Nbd7 6.f4 Ne4 7.Nf3 Bb7 8.Be2+/–.

2.Bb2 c5

3.a3 d5 (3...d6 4.e4 a6 5.Nf3+=) 4.g3 (4.bc5!? Qc7 5.e4+=) 4...e5 5.Be5 f5 (5...Nc6!? 6.Bb2 cb4 7.ab4 Nb4=) 6.Bg2 (better is 6.bc5 Nd7 7.Bd4 Nc5 8.Bg2+/–) 6...Qd6?? (better is 6...Nc6 7.Bb2 cb4 8.ab4 Nb4+=) 7.Bd6+– Nc6 8.Bf8 g5 9.Bg7 h5 10.Bh8 a5 11.Bd5 (better is 11.bc5 Nge7+–) 11...h4 12.Bc6 Kd8 13.e3 (13.Ba8 cb4 14.gh4 gh4 15.ab4 ab4+–) 13...g4 14.Ba8 f4 15.Nc3 (15.ef4 cb4 16.Qe2 Bd7+–) 15...c4 16.Nb5 ab4 17.ab4 c3 18.dc3 Ke8 19.Bc6 Bd7 (19...Kf7 20.Qd5 Kg6 21.Qg8 Kh6 22.Qg7 Kh5 23.Be8) 20.Qd7 Kf8 21.Qg7 1–0. coloplayah (2140) – useridzero, net–chess.com, 2006.

3.bc5 Qc7 4.d4 d5. GuestHKRL – lihilihi, freechess.org, 2017.

2.Bb2 c6

(--> 1.b4 c6 2.Bb2 b5).

3.Nf3 d5 (--> 1.b4 c6 2.Bb2 d5 3.Nf3 b5).

2.Bb2 e6

(--> 1.b4 e6 2.Bb2 b5).

3.a3 Bb7 4.e3 Nf6 5.Nf3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3).

3.a3 f6 (--> 1.b4 e6 2.Bb2 f6 3.a3 b5).

3.a3 Nf6 (--> 1.b4 e6 2.Bb2 Nf6 3.a3 b5).

3.a3 Nf6 4.e3 Bb7 5.Nf3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3).

3.e3 Bb7 4.Nf3 a6 5.c4 bc4 6.Bc4 Nf6 7.a3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

3.e3 Bb7 4.Nf3 Nf6 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6).

3.e3 Nf6 4.a3 Bb7 5.Nf3 a5 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a5).

3.Nf3 Nc6 4.a3 Bb7 5.e3 Nf6 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 Nc6).

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

3.Nf3 Nf6 4.a3 Bb7 5.e3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3).

3.Nf3 Nf6 4.a3 d5 (--> 1.b4 d5 2.Bb2 Nf6 3.Nf3 e6 4.a3 b5).

2.Bb2 f5

3.e3 Nc6 4.a3 (better 4.Bb5 Nf6 5.Nc3+=) 4...d5? (better 4...a6=) 5.Bb5+– a6?? (better 5...Bb7+–) 6.Bc6 Bd7 7.Ba8 Qa8 8.Nf3 (8.Qh5 g6 9.Qh4 Nf6 10.Bf6 ef6 11.Qf6 Rg8 12.Qe5 Kd8+–) 8...h5 (8...Nf6 9.0–0+–) 9.0–0 Rh6 (9...Nf6 10.Be5+–) 10.Ne5 Bb5 (10...Nf6 11.Bd4+–) 11.Qf3 c6 (11...e6 12.c4! Bc6 13.Nc3+–) 12.Qf5 Rf6 13.Qd7 1–0. GuestGHFP – ReadySteadyRook, freechess.org, 2019.

3.Nf3 f4 4.Nc3 c6 5.e4 (5.a4 ba4 6.e4 fe3 7.de3 d6+/–) 5...Qb6 (5...fe3 6.de3 a5 7.ba5+=) 6.Be2 (6.Ne2 Nf6+/–) 6...Na6 (6...a5 7.ba5 Qa5 8.a3+=) 7.a3+/– Bb7 8.d3 (White claimed a win on time, 1–0). Duncanguy – xorb, ChessWorld.net, 2013.

3.Nf3 Nf6 4.e3 a6 5.a4+=.

2.Bb2 h5

3.e3 Bb7 4.a4 c6 5.Nf3 ba4 6.Ra4 d5 7.Be2 Nf6 8.0–0 g6 9.b5 Bc8 10.Bf6 ef6 11.bc6 Nc6 12.Bb5 Qd7 13.Nd4 Bb7 14.Ra6 Rc8 15.Ra7 Na7 16.Bd7 Kd7 17.Nc3 Bg7 18.Qb1 Ba6 19.Nd5 Rb8 20.Qa1 Bf1 21.Qa7 Kd6 22.Qc7 Kd5 23.Qc6 Ke5 24.f4 1–0. Bonetti,Shane – Jockel (1685), ICC, 2002.

3.h4 d5 4.e3 f6 (better 4...Bd7!?=) 5.Bb5+– c6 6.Ba4 (6.Be2 g6+–) 6...e5 7.c3 (better 7.a3+–) 7...g5? (better 7...a5!?+=) 8.hg5+– fg5 9.Rh5 Rh5? (better 9...Nh6 10.Rh1 Bg7+–) 10.Qh5 Kd7 11.b5 (11.c4 dc4 12.Qf7 Ne7+–) 11...a6 (11...Bd6 12.c4 Ne7 13.Nf3+–) 12.Qh7 (12.bc6 Nc6 13.c4 Nge7+–) 12...Ne7 13.bc6 Nbc6 14.Ba3 (14.Nf3 Kc7 15.Bc6 Kc6 16.Ne5 Kb7+–) 14...Bb7 (14...g4 15.e4 d4 16.Qh8+–) 15.Nf3 Kc8 (15...Qc7 16.Ng5 Qc8+–) 16.Ng5 Qa5 (16...Qd7 17.Bc6 Bc6 18.Qf7+–) 17.Bc6 Bc6 18.Ne6 Kd7 (18...Rb8 19.Be7 Be7 20.Qe7 e4+–) 19.Nf8 Rf8 20.Qe7 Kc8 21.Qf8 Kb7 22.Qb4 (better 22.Bd6 Bd7 23.Be5 Bg4+–) 22...Qb4 23.Bb4 Kb6 24.f3 (24.d4 e4+–) 24...a5 25.Bd6 e4 26.fe4 de4 27.g4 (27.c4 Ba4+–) 27...Bd7 28.g5 Be8 29.c4 Kc6 30.Bf8 (30.c5 Kd7+–) 30...Kd7 31.Nc3 Bf7 32.c5 Kc6 33.Ne4 a4 34.d4 a3 35.Kf2 Kd5 36.Kf3 Bg6 37.Nd2 (better 37.Nf6 Kc6+–) 37...Be8 38.Nb1 Ke6 39.Kf4 Kf7 40.Bh6 Ke6 41.e4 Bf7 42.Na3 Be8 43.Nc4 Bf7 44.d5 Kd7 45.Ne5 (45.c6 Kc7 46.Rb1 Be8 47.Rb7 Kd8 48.c7 Kc8 49.Nd6 Kd7 50.c8Q Kd6 51.Qc7) 45...Ke7 (45...Ke8 46.Rb1 Kd8 47.Bf8 Be6 48.Rb8 Bc8 49.d6 Ke8 50.Rc8) 46.Nf7 (46.d6 Kd8 47.Nf7 Kd7 48.Ne5 Ke6 49.g6 Kf6 50.g7 Ke6 51.g8Q Kf6 52.Bg7) 46...Kf7 47.Kf5 Ke7 48.g6 Kd7 49.g7 Kc7 50.g8Q Kb7 51.Rb1 Ka7 52.Qb8 Ka6 53.Qa8 (53.Qb6) 1–0. Delboy Smith (1725) – Duke of Earl, ChessWorld.net, 2009.

2.Bb2 h6

3.e3 a6 4.c4 bc4 5.Bc4 Nf6 6.Nf3 e6 7.0–0 Nc6 (better is 7...Bb4!? 8.Ne5 0–0+=) 8.a3+= d5 9.Bb3 Bd6 10.h3 0–0 11.Nc3 Ne7 12.Rc1 c6 13.Ne2 Ne4 14.d3 Nf6 15.Ng3 Bg3 16.fg3 Ng6 17.Ne5 Ne5 18.Be5 Nd7 19.Bd6 Re8 20.Rc6 Bb7 (better is 20...Nb8 21.Bc7 Qg5+–) 21.Rc7 Bc8 (21...Rb8 22.Ba4 Nf6 23.Be8 Ne8 24.Qh5 Qd6 25.Qf7 Kh7 26.Rb7 Rb7 27.Qb7 (27.Qe8?! Rb8 28.Qf7 a5+–) 27...Qg3 28.Rf3+– (28.Qa6?! Qe3 29.Kh2 Qe2+–)) 22.Qh5 f6 23.e4 de4 24.de4 Ne5 (24...a5 25.e5 f5+–) 25.Be5 a5 (25...Re7 26.Rf6! Rc7 27.Rh6 Rc1 28.Kh2 gh6 29.Qg6 Kf8+–) 26.Qf7 Kh8 (26...Kh7 27.Qg7) 27.Qg7 1–0. alaamattar (2240) – valerypavlovich (2100), net–chess.com, 2013.

3.Nf3 Bb7 4.e3 Nc6 5.a3 e6 (5...a6 6.c4 bc4 7.Bc4+=) 6.Be2 (6.Bb5 a5+–) 6...Nf6 (6...a6 7.0–0+=) 7.0–0 (7.Bb5 a5 8.ba5 Ra5+–) 7...Be7 (7...a6 8.c4 bc4 9.Bc4+=) 8.d3 (8.Bb5!? a5 9.ba5+–) 8...0–0 9.Nbd2 a6 10.c4 Bd6 11.c5 Be7 12.d4 d6 13.Qc2 dc5 14.dc5 Nd5 15.Rad1 Qc8 16.e4 Nf6 17.Nd4 Nd4 18.Bd4 Bc6 19.f4 Qd7 20.Bf6 Bf6 21.e5 Be7 22.Bf3 Qd4 23.Kh1 Bf3 24.Nf3 Qf4 25.Nd4 (better 25.Rd7!? Bd8 26.Rfd1+=) 25...Qe5=+ 26.Nc6 Qg5 27.Rd7 Bd8 (27...Bf6 28.Rc7 Rac8 29.Rc8 Rc8 30.Qe4–/+) 28.Qe4= Rc8 (better 28...Qh5=) 29.h4?? (better 29.Rdf7! Rf7 30.Qe6=) 29...Qg3 (29...Qh4 30.Qh4 Bh4 31.Na7–+) 30.Ne5? Increases the pressure on f7 (better 30.Re7–/+) 30...Qh4 (30...Bh4 31.Nf7 Bg5 32.Qe6–/+) 31.Qh4 Bh4 32.Nf7 Bf6 (better 32...e5–+) 33.Nd6?? (better 33.Rf6 gf6 34.Nh6 Kh8 35.g4–/+) 33...cd6–+ 34.Rd6 e5 (better 34...Be5 35.Rf8 Rf8 36.Rd1–+) 35.Ra6 Rb8 36.Rd1 Rfc8 (36...e4 37.Re1 Rbe8 38.g3–+) 37.Rdd6 e4 38.Re6 Re8 39.Kg1 e3 40.Kf1 Re6 41.Re6 Bg5 42.Ke2 Kf7 43.Rb6 Rb6 (43...Ra8 44.Rb5 Ra3 45.Ra5–+) 44.cb6 Ke6 45.b7 Bf4 46.b8Q (46.Kf3 g5 47.g3–+) 46...Bb8 47.Ke3 Kd5 48.Kd3 Be5 49.g4 g6 50.Kc2 Kc4 51.Kb1 (51.Kd1 h5–+) 51...Kb3 (better 51...h5 52.gh5 gh5 53.Kc2–+) 52.a4 (52.Kc1–+) 52...ba4 53.b5 a3 (53...Bb2 54.b6 a3 55.b7 a2) 54.b6 (54.Kc1 a2 55.Kd1 a1Q 56.Ke2 Qb2 57.Kd3 Qg2 58.Ke3 Kc4 59.b6 g5 60.b7 Bd4) 54...h5 (54...Bb2 55.b7 a2) 55.gh5 (55.Kc1 a2 56.Kd1 a1Q 57.Ke2 Qb2 58.Ke3 hg4 59.Kd3 Qc3 60.Ke2 Qf3 61.Kd2 Bc3 62.Kc1 Qf1) 55...gh5 (55...Bb2 56.hg6 a2) 56.b7 (56.Kc1 h4 57.Kd2 h3 58.Ke3 h2 59.Ke4 h1Q 60.Ke5 a2 61.Kf4 a1Q 62.Ke3 Qae1 63.Kf4 Qhe4 64.Kg5 Q1h4) 56...h4 (56...a2 57.Kc1 a1Q 58.Kd2 Qd4 59.Ke2 Qg4 60.Kf1 Qd1 61.Kf2 Bd4 62.Kg3 Qg4 63.Kh2 Be5 64.Kh1 Qh3 65.Kg1 Bd4) 57.Kc1–+ Bb8 58.Kd2 h3 59.Ke2 (59.Kd1 h2 60.Kd2 a2 61.Ke1 a1Q 62.Kd2 Qc3 63.Ke2 h1Q 64.Kf2 Qcf3) 59...a2 (59...h2 60.Kd3 a2 61.Ke3 a1Q 62.Kd2 Qc3 63.Ke2 h1Q 64.Kf2 Qcf3) 60.Kf2 (60.Kf1 a1Q 61.Ke2 h2 62.Kf2 h1Q 63.Ke2 Qe4 64.Kd2 Qae1) 60...a1Q 61.Ke3 h2 62.Ke4 h1Q 63.Kd3 (63.Kf5 Qe5 64.Kg4 Qhh5) 63…Qc3 (63...Qc3 64.Ke2 Qhf3; 63...Qf3 64.Kd2 Qac3) 0–1. Adjailton (1855) – jailsonjrn, lichess.org, 2016.

2.c3 c6

3.Qb3 Qb6 (3...a5 4.Nf3=) 4.e3 e6 5.Ne2 (5.a4 Bb7=) 5...Ne7 (5...a5 6.Bb2=) 6.Bb2 Bb7 7.Na3 Na6 (7...a5=) 8.0–0–0 (8.c4 Ng6=) 8...0–0–0 (8...c5!? 9.bc5 Nc5 (worse 9...Qc5 10.Nb5 Nc8 11.Ba3+=) 10.Qb5 Ba6 11.Qb6 Nd3 12.Kb1 ab6=+) 9.c4 c5 10.cb5 Nb4 11.Kb1 (11.Nc4 Qc7+=) 11...a6 (11...Bd5!? 12.Nc4 Bc4 13.Qc4 d5–/+) 12.ba6 (12.Nc4 Qc7 13.b6 Qb8+=) 12...Ba6 (12...Bd5 13.Nc4 Bc4 14.Qc4=+) 13.Rc1 (13.d4 d6+=) 13...Ned5 (13...d5 14.Nc3 Bf1 15.Na4=+) 14.Nf4 (14.Nc4!? Bc4 15.Qc4+=) 14...Nf4=+ 15.Ba6 (15.ef4!? Bf1 16.Rhf1=+) 15...Qa6–/+ 16.ef4 Qe2?? (better 16...Qd3 17.Qd3 Nd3–/+) 17.Qb4+– Qf2 (17...Qd3 18.Ka1 d6 19.Qa4+–) 18.Qa5 (18.Nb5 d5 19.Na7 Kd7 20.Qb5 Ke7 21.Nc6 Kd7 22.Ne5 Kc8 23.Qc6 Kb8 24.Nf7 Qg2 25.Nd8+–) 18...Qg2 19.Nb5 Qb7 20.d4 d6 (20...Be7 21.dc5 f6 22.c6 dc6 23.Rc6 Qc6 24.Na7 Kb7 25.Nc6+–) 21.dc5 dc5 22.Rhe1 (better 22.Na7 Kb8 23.Qd8 Ka7 24.Rhd1+–) 22...Be7 23.Re3 Rd5 (23...Rd7 24.f5 Rd5 25.Rb3+– (worse 25.Bg7 Rhd8 26.f6 Bd6+–; worse 25.fe6 fe6 26.Re6 Bd8 27.Nd6 Rd6 28.Qc5 Kb8 29.Qd6 Bc7 30.Rc7 Qc7+–)) 24.Rb3 Bd8 (24...Rd7 25.Be5 f6 26.Bd6 Qe4 27.Kb2 Bd6 28.Nd6 Rd6 29.Qc5 Qc6 30.Qd6 Qc1 31.Kc1 Rd8 32.Rb8) 25.Qa4 (better 25.Na7 Kb8 26.Qa6 Qb3 27.ab3+–) 25...Bb6 26.Nd4 (better 26.Na3 Kc7 27.Nc4 Ra8+–) 26...Kd8?? (26...Kc7+–) 27.Nf3 (better 27.Nc6 Ke8 28.Na5 Qd7 29.Qd7 Kd7 30.Rb6 Ra8+–) 27...Ke7 28.Qa3 (28.Ne5 Rd6 29.Rc5 f6+–) 28...Qa7 (better 28...Rc8 29.Bg7 Rd7+–) 29.Qa7 Ba7 30.Ne5 (30.Bg7?! Rb8 31.Rcc3 f6+–) 30...Ra8 31.Rb7 Kd6 (31...Ke8 32.Nf7 Rd2 33.Ne5+–) 32.Nf7 (32.Rd7) 32...Kc6+– 33.Re7 g6 (33...Bb8 34.Re6 Kd7 35.Re4+–) 34.Re6 (34.Ne5!? Kb5+–) 34...Kd7 35.Re4 (35.Rf6 Bb8+–) 35...Rf8 (35...Rd2 36.h3+–) 36.Ne5 Kc8 37.Rf1 Bb8 38.Nc4 g5 (38...Rh5 39.Bg7 Rff5 40.Re8 Kb7 41.Na5 Ka7 42.Nc6 Kb6 43.Nb8 Rh2 44.Ka1+–) 39.f5! Rdf5 (39...Rdf5 40.Re8 Double attack; 39...Rff5 40.Ne3 Double attack (40.Ne3 Decoy)) 40.Rf5 (40.Re8! Re8 41.Rf5 Re1 42.Kc2 Bf4+–) 40...Rf5 41.Re8 Kb7 42.Re7 Ka6 43.Rh7 Rf1 44.Kc2 Rf2 45.Nd2 (45.Kb3 Rh2 46.Rf7 g4+–) 45...Bh2 46.Ba3 (better 46.Rh6 Kb7 47.Kd3+–) 46...Bf4+= 47.Bc1 g4 48.Rg7 ½–½. mikem211 – vknyus, gameknot.com, 2016.

3.Qb3 Qb6 (3...a5 4.Nf3=) 4.e3 e6 5.Ne2 (5.a4 Bb7=) 5...Ne7 (5...a5 6.Bb2=) 6.Bb2 Bb7 7.Na3 Na6 (7...a5=) 8.0–0–0 (8.c4 c5+=) 8...0–0–0 (better 8...c5!? 9.bc5 Nc5 (worse 9...Qc5 10.Nb5 Nc8 11.Ba3+=) 10.Qb5 Ba6 11.Qb6 Nd3 12.Kb1 ab6=+) 9.h4 Nc7 10.Ng3 h5 11.c4 d6 12.cb5 (12.cb5 cb5 13.Kb1=). vknyus – callingalldorks, gameknot.com, 2015.

3.Qb3 Qb6 (3...a5 4.Nf3=) 4.e3 e6 5.Ne2 (5.a4 Bb7=) 5...Ne7 (5...a5 6.Bb2=) 6.Bb2 Bb7 7.Na3 Na6 8.0–0–0 (8.c4 Ng6+=) 8...0–0–0 (better 8...c5!? 9.bc5 Nc5 (worse 9...Qc5 10.Nb5 Nc8 11.Ba3+=) 10.Qb5 Ba6 11.Qb6 Nd3 12.Kb1 ab6=+) 9.Ng3 Nd5 10.Nc2 Bd6 (10...h5 11.h4=) 11.Nh5 g6 12.Ng3 c5 (12...Be5 13.d4 Bb8 14.e4=) 13.c4 (13.Bb5!? f6 14.Ne4+–) 13...bc4+= 14.Bc4 Rhg8 15.h4 (15.b5 Nab4 16.Ne1 Ne7+=) 15...h5 (better 15...Ndb4!? 16.Nb4 Nb4–/+) 16.b5= Ndb4? (16...Nab4 17.Na1 Bg3 18.fg3=) 17.a4?? (better 17.ba6 Bg2 18.Rh2+–) 17...Nc2 18.ba6 (worse 18.Qc2 Nb4 (worse 18...Bg2 19.ba6 Bh1 20.Rh1+=) 19.Qb3 Bg2–/+) 18...Nb4? (better 18...Qb3 19.Bb3 Bg2=) 19.ab7 Qb7 20.f3?? (better 20.Bf6+–) 20...Bg3–/+ 21.d4 d6 (21...d5 22.Bb5 a6 23.dc5–/+) 22.f4? (better 22.Rh3!? Bf2 23.Rf1=) 22...Qg2–/+ 23.Rhg1 (23.dc5 dc5 24.Bf6 Rd1 25.Rd1 Qc6–/+) 23...Qh3 24.e4? (better 24.Rh1 Qf5 25.Kd2–+) 24...Bf4 25.Kb1 Qh4 26.dc5 (26.Rgf1–+) 26...Nc6 (better 26...dc5 27.Rgf1 Rd1 28.Qd1 Rd8–+) 27.Ba6+– Kd7 28.Qb7 Ke8 29.Qc6 Kf8 30.cd6 Rb8 31.Qc7 Rb2 32.Kb2 Be5 33.Kb3 Kg7 (33...Qf2 34.a5+–) 34.Rdf1 (34.Bd3 Qd8 35.Be2 Qc7 36.dc7 Rc8+–) 34...Qh3 (34...Rf8+–) 35.Kc2 Qh2 36.Kd1 Bf4 (36...Rf8 37.Bd3+–) 37.Qc3 Be5 (37...e5 38.Be2 Rb8+–) 38.Qc2 (38.Rf7 Kh8 39.Qe3 Bg7 40.Rg6 Qd6 41.Bd3 Rf8 42.Rgg7 Qd3 43.Qd3 Rf7 44.Rf7 Kg8 45.Ra7 h4 46.Qd8) 38...Qh4?? (better 38...Qc2 39.Kc2 Bd6+–) 39.d7 (better 39.Rf7! Kh6 40.Qd2 g5 41.d7+–) 39...Qe7 40.Bc8 Qd6 41.Qd2 (41.Ke2 Rd8+–) 41...Qd2 (41...Qc6 42.a5+–) 42.Kd2 Bc7 43.Rg2 Ba5 (43...h4 44.Ke3+–) 44.Kd3 Rf8 (44...f6 45.Rb1 Bb6 46.Rb5+–) 45.Kc4 Bb6 46.Rg3 (46.Rd2 h4+–) 46...Bc7 (46...f5 47.Rd3 Rd8 48.Rd6+–) 47.Rgf3 Bd8 48.Ba6 (better 48.e5 g5+–) 48...h4 (48...f5 49.ef5 ef5 50.Kd5+–) 49.Kb5 (49.e5 Bb6+–) 49...f6 (49...f5 50.Kc6+–) 50.Kc6 e5 51.Kb7 Rf7 52.Kc8 (52.Rd1 f5+–) 52...Rf8 53.Kb7 Rf7 54.Kc6 g5?? (54...Rf8 55.Bc4 Rh8+–) 55.Bc4 Rf8 56.Be6 a5 57.Bf5 Be7 58.Rd1 Ra8 (58...Kf7+–) 59.Rfd3 Ra6 (59...Rd8+–) 60.Kb7 Rd6 61.Rd6 Bd6 62.Rd6 h3 63.Bh3 (63.d8Q h2 64.Qf6 Kg8 65.Rd8) 63...Kh6 (63...Kf8 64.d8Q Kg7 65.Qf6 Kg8 66.Be6 Kh7 67.Rd7) 64.d8Q Kh5 (64...Kh7 65.Bf5 Kg7 66.Qf6 Kg8 67.Rd8) 65.Qh8 Kg6 66.Rf6 1–0. vknyus – km_hunter, gameknot.com, 2015.

3.Qb3 Qb6 (3...a5 4.Nf3=) 4.e3 e6 5.Ne2 (5.a4 Bb7=) 5...Ne7 (5...a5 6.ba5 Qa5 7.e4=) 6.Bb2 Bb7 7.Na3 Na6 (7...a5=) 8.0–0–0 (8.c4 Ng6+=) 8...0–0–0 (better 8...c5!? 9.bc5 Nc5 (worse 9...Qc5 10.Nb5 Nc8 11.Ba3+=) 10.Qb5 Ba6 11.Qb6 Nd3 12.Kb1 ab6=+) 9.h4 d5 10.h5 Nf5 11.g4 Nd6 12.Bh3 Ne4 13.Rhf1 c5 14.bc5 Nac5 (worse 14...Qc5 15.Nb5 Qb6 16.Nbd4+=) 15.Qb5? (better 15.Qc2!?=+) 15...Qb5 (15...Nf2 16.Nf4 Qb5 17.Nb5 Nd1 18.Kd1–+) 16.Nb5 Nd3 (16...Nf2 17.Ba3 Ncd3 18.Kc2–+) 17.Kb1 (17.Kc2 Ndf2 18.Ned4 Bc5–+ (18...Nh3?! 19.Na7 Kc7 20.Rf7 Kb6 21.Rb1+=; 18...Nd1?! 19.Na7 Kc7 20.Rf7 Kb6 21.Kd1–/+)) 17...Bc5 (17...a6!? 18.Na3–+) 18.f3–/+ Nd6?? (better 18...Nef2 19.Bg2 Nd1 20.Rd1 Kd7–/+) 19.Nd6 (19.Nc1 Nb2 20.Nd6 Rd6 21.Kb2 Rb6 22.Nb3 Ba6=) 19...Bd6 (19...Rd6 20.Ba1=+) 20.Nc1 Nb2 21.Kb2 g6 22.h6 Ba6 23.Rg1 Rd7 24.Nb3 (24.Bf1 Rb7 25.Kc2 Bf1 26.Rgf1 Kd7+=) 24...Rb7 (24...Be2 25.Rc1 Bf3=) 25.Rb1 (25.Bf1 Bf1 26.Rgf1 Kd7+=) 25...Bc4 (better 25...Bd3=+) 26.Kc2+– f6 (26...g5 27.Bf1+–) 27.Nd4 (27.Na5 Rc7 28.Nc4 dc4+–) 27...Rb1 28.Rb1 Ba2? (better 28...e5!? 29.Nb5 Bc5+–) 29.Ra1+– (29.Ne6 Bb1 30.Kb1 Kd7–/+) 29...Bc4 30.Ra7 Rd8?? (better 30...Bb8 31.Rf7 e5 32.g5 f5 33.Nf5 gf5 34.Bf5 Kd8 35.Bh7 d4+–) 31.Rh7 (31.Ne6?! Rd7 32.Ra8 Kb7+–) 31...g5 (31...e5 32.Nc6 Rf8 33.d3+–) 32.Ne6 Re8 33.Nd4 (33.Rg7 d4 34.Nd4 Rh8+–) 33...Ba6 (33...Be5 34.Nc6 Bd6 35.Ra7+–) 34.Nf5 Bf8 (34...Be5 35.d4 Bc7 36.Ne7 Kd8 37.Nd5+–) 35.Ra7 (better 35.Rh8 Kd8 36.h7 d4+–) 35...Bb7 36.f4 (better 36.h7 Bc5 37.Ra5 Rh8 38.Rc5 Kb8+–) 36...Bc5 (36...Kb8 37.h7 Bc5 38.Rb7 Kb7 39.Bg2+–) 37.Ra1 (better 37.Ra5 Be7 38.fg5 fg5+–) 37...Rh8 38.Bg2 gf4 (38...Kc7 39.fg5 fg5 40.Rh1+–) 39.ef4 Rh7 (39...Kd8 40.d4 Bf8 41.g5+–) 40.Rh1 (40.g5 fg5 41.fg5 Bf8+–) 40...Bc6 (40...Kd8 41.d4 Be7 42.g5 fg5 43.Ne7 Ke7 44.fg5+–) 41.d4 Bf8 42.g5 fg5 (42...Rh8 43.Ne3+–) 43.fg5 Ba4 44.Kd3 Bb5 45.Ke3 Bc6 (45...Bd7 46.g6 Bf5 47.gh7 Bh7 48.Bd5+–) 46.c4! Bd7 (46...dc4 47.Bc6 Pinning (47.Bc6 Deflection)) 47.g6 Rh8 (47...Bf5 48.gh7 Bh7 49.Bd5 Kc7+–) 48.g7 Bg7 49.hg7 Re8 50.Kf4 dc4 51.Nd6 Kd8 52.Ne8 Ke8 53.g8Q Ke7 54.Rh7 Kd6 55.Qd5 (55.Qd5 Kc7 56.Qc6 Kd8 57.Qd7; 55.Qb8 Ke6 56.Qe5) 1–0. vknyus – beard1720, gameknot.com, 2015.

3.d4 d5 (3...a5=) 4.f4 (4.a4!?+=) 4...Nf6 (4...a5 5.Qd3=+) 5.e3 (5.a4 Ne4=) 5...g6 (5...a5 6.Bd3=+) 6.Bd3 Bg7 7.Nf3 Nbd7 (7...a5 8.0–0=) 8.f5 (better 8.a4!?+=) 8...Nb6 9.fg6 fg6 (9...hg6 10.0–0=+) 10.0–0= Nc4 11.Nbd2?? (11.Na3 a5 12.Bc2 Na3 13.Ba3 Qd6=) 11...Bf5?? (11...Ne3!? 12.Qb3 Nf1 13.Nf1–+) 12.Bf5? (12.Qe2 Bd3 13.Qd3 a5=) 12...gf5?? (better 12...Ne3 13.Qe2 Nf1–+ (13...Nf5?! 14.a4=)) 13.Nc4+= bc4 14.Ne5 Ne4?? (14...Qc8 15.a3=) 15.Rf5 (15.Qh5 Kf8 16.Qf7) 15...Be5+= 16.de5 (16.Qh5 Kd7 17.Re5 Nc3 18.Qf5 Ke8+=) 16...Qd7 17.Qh5 Kd8 18.e6 (better 18.Bb2!?+=) 18...Qe6=+ 19.Ba3 (19.Bb2 a5=) 19...Kc7 (19...Nc3!? 20.Qf3 Nb5–/+) 20.Re5= Qf6 21.Rf1 Qg7?? (better 21...Qd6=) 22.Rf7+– Qg6 (22...Qf7 23.Qf7 Kb6 24.Re7 Rhb8 25.Qh7 Nc3+–) 23.Ree7 Kb6 24.Rb7 (better 24.Qe5 Rhc8 25.Qd4 c5 26.Qd5+–) 24...Ka6+– 25.b5! Ka5?? (25...cb5 26.Qg6 Deflection (26.Rh7 Zwischenzug)) 26.Bb4 Ka4 27.Qd1 1–0. anonym1337 – Vince7777, lichess.org, 2020.

2.c3 Nc6

3.e3 Rb8 4.Nf3 g6 (4...e5!?=) 5.d4 (5.a4 a6+/–) 5...e6 6.Nbd2 (6.a4 ba4 7.b5 Nce7+/–) 6...a5+= 7.a3 Nf6 8.Be2 Rg8 (8...Nd5 9.Qc2+=) 9.0–0 Bh6 (9...Nd5 10.Qc2+/–) 10.Re1 d6 (10...Kf8 11.a4 ab4 12.ab5 bc3 13.Nb1+/–) 11.c4 (11.a4 Nd5 12.Nb1 ab4+/–) 11...Ba6 (11...bc4 12.Qa4 Bd7 A) < 13.Nc4 Nd4 (13...ab4?! 14.Qd1=) 14.Qd1 Ne2 15.Qe2 ab4–/+; B) < 13.ba5 Nd4 14.Qc4 Ne2 15.Qe2 Bg7=+; C) 13.b5+=) 12.cb5 (12.a4!? bc4 13.b5 c3+–) 12...Bb5+/– 13.a4 (better is 13.Qc2 Qd7 14.ba5 Be2 15.Re2 Na5 16.Qc3+/–) 13...Be2=+ 14.Re2 Nb4 15.e4 Nd3 16.Nc4? (better is 16.Qc2 Nf4 17.Re1=) 16...Nf4?? (better is 16...Nc1!? 17.Rc1 Bc1 18.Qc1 Qd7–/+) 17.Na5 (17.Bf4 Bf4 18.Na5 c5+–) 17...Rb6?? (17...Ne2 18.Qe2 Bc1 19.Rc1=+) 18.Rd2?? (better is 18.Bf4 Bf4 19.d5+/–) 18...Ne4=+ 19.Ne5?? (better is 19.Rc2=+) 19...Nc3 (better is 19...de5 20.Rc2 Qd4 21.Be3 Qd1 22.Rd1–+) 20.Qe1 (20.Nec6 Nd1 21.Nd8–+) 20...f6 (20...de5 21.Qe5 f6–+) 21.Nec6=+ Qd7 22.Rc2 Ne4?? (better is 22...Ncd5 23.Qf1 g5=) 23.Qe4 f5 (23...d5 24.Qf3 (24.Bf4 de4 25.Bh6 g5–/+) 24...Qd6 25.g3 Nh3 26.Kg2+–) 24.Qf3 (24.Bf4 fe4 25.Bh6 g5=+) 24...Kf7 (24...g5+–) 25.Bf4 Bf4 26.Qf4 Ra8 27.Re1 d5 (27...Kg8 28.Qf3 Rba6 29.d5 Ra5 30.Na5 Ra5 31.de6 Qa4 32.Qb7+–) 28.Rce2 (better is 28.Ne5 Kg7 29.Nd7+–) 28...Qd6 (28...Rc6 29.Nc6 Qc6 30.Re6+–) 29.g3 (better is 29.Qd6 cd6 30.Re6 Rba6 31.Re7 Kg8+–) 29...Qf4 30.Kh1 (better is 30.gf4 Rba6 31.Re6 Ra5 32.Re7 Kf8 33.Na5 Ra5 34.Re8 Kg7 35.R1e7 Kf6 36.Rh7+–) 30...Qf3–+ 31.Kg1 Qc3 32.Ne5 (32.Re6 Ra5 33.Re7 Kf6 34.R1e6 Kg5 35.f4 Kh6 36.Na5 Qd4 37.Kf1–+) 32...Ke7 33.Nec6 Rc6 34.Nc6 Qc6 35.Re5 (35.a5 Ra5 36.h3 Ra4–+) 35...Ra4 36.Re6 Qe6 37.Re6 Ke6 (38.Kg2 Rd4–+) 0–1. rene822 – garyp, Live Game Caissa's Web, 2004.

3.e3 Nf6 4.Nf3 e6 (4...a6 5.d4+=) 5.d4 (5.Bb5 Bb7+/–) 5...Bb7 (5...a5 6.Bb5 ab4 7.Bd2=) 6.Bd3 (6.Bb5 a5 7.ba5 Ra5+/–) 6...Be7 (6...a5 7.ba5 Ra5 8.0–0=) 7.Bb2 (7.Bb5 a5 8.ba5 Ra5+/–) 7...0–0 (7...a5 8.a3=) 8.Nbd2 (8.Bb5 a5 9.a3 Qb8+=) 8...h6 (8...a5 9.ba5 b4 10.0–0=) 9.0–0 (9.Bb5 a5 10.a3 Rb8+/–) 9...d5 (9...a5 10.a3+=) 10.Re1 (10.Bb5 Bd6+/–) 10...Bd6 (10...a5 11.a4 ba4 12.b5+=) 11.Qc2 (11.Bb5 a5 12.a3 Ne7+/–) 11...Ne7 (11...a6 12.a4+=) 12.a3 (12.Bb5 Qb8+/–) 12...a6 13.e4 (13.a4 Qe8+=) 13...de4= 14.Ne4 Ne4 15.Be4 Be4 16.Qe4 Nd5 17.Rac1 Nf6 18.Qe2 Qd7 19.h3 Rac8 20.Red1 c6 21.Ne5 Be5 22.de5+/– Nd5 23.c4 bc4 24.Rc4 Qb7 25.Rcd4 Rfd8 26.R4d2 Rd7 27.Qe1 Rcd8 28.Qe2 Nf6?? 29.ef6+– gf6 30.Rd7 Rd7 31.Rd7 Qd7 32.Kf1 Kf8 33.Ke1 Ke7 34.Qd2 Qd2 35.Kd2 e5 36.f3 Ke6 37.g4 Kd5 38.h4 f5 39.gf5 f6 40.Ke3 h5. Fournier,Frederic (1765) – offnennen (1820), Active blind, 2011.

2.Nc3 a5

3.ba5 b4 4.Nb1=.

3.Nb5 ab4 4.d4? (better is 4.a4=+) 4...c6–+ 5.e4 cb5 6.Bb5 Bb7 7.Qg4? (7.f3–+) 7...Qb6 8.a4 (8.Bd3 Qd4 9.Rb1 Nf6–+) 8...ba3 (< 8...Qd4 9.Rb1–+) 9.Bd3 Qd4 10.Rb1 (10.Ra2 Nf6 11.Qe2 Ne4 12.Be4 Be4 13.f3–+) 10...a2 11.Rb7 a1Q 12.Ne2 Qa5 13.Bd2 (13.Kf1 Qd6 14.Qf3–+) 13...Qda1 14.Nc1 Qc1 15.Ke2 Qad2 16.Kf3 Qh1 17.Kg3 h5 18.Bb5 Qd6 (18...hg4 19.Rb8 Rb8 20.Bd7 Kd7 21.c4 Qh2 22.Kg4 Qdf4) 19.f4 (19.e5 Qe5 20.Qf4 h4 21.Kh3 Qe6 22.Qg4 Qg2 23.Kg2 Qg4 24.Kh1 Ra1 25.Bf1 Rf1) 19...Qe1 20.Kh3 hg4 21.Kg4 Rh4 22.Kf3 Qf4 (22...Rf4?!=) 0–1. Bill Kolt – marekt, ChessWorld.net, 2003.

2.Nc3 Nc6

3.a3 a6 4.d4 Nf6 5.d5+=.

3.a3 Bb7 4.Bb2 (4.Nb5 Nf6+=) 4...e5 5.e4 Nf6 6.d3 (6.Bd3 a6=) 6...d6 (6...a5 7.Nf3 ab4 8.Nb5 ba3 9.Na3+=) 7.h3 (7.Nf3 a6=) 7...Be7 8.Nf3 a6 9.Bc1 h6 10.Be3 d5 11.ed5 Nd5 12.Bd2 Nc3 13.Bc3 Bd6 14.Be2 Ne7 15.0–0 Nd5 16.Bb2 0–0 17.Re1 (17.Be5? Be5 18.Ne5 Qe7–+) 17...Nf4 18.Bf1 Will e5 fall? 18...Qf6 19.Ne5 Be5 (better is 19...Rfe8 20.d4 Rad8=) 20.Be5+/– Qf5 21.Bf4 (21.d4!?+–) 21...Qf4+/– 22.Re3 Qg5 23.Rg3 Qe5 24.d4 Qd5 25.Qd2 Rad8 26.c3 Rfe8? (better is 26...Qd6+/–) 27.Qh6+– Qe6 (27...g6+–) 28.Qg7 1–0. grahamtrue (2165) – smoothoperator (2255), net–chess.com, 2015.

3.e4 e5 4.Bb5 Nb4 (4...Bb4 5.Nd5 Bf8 6.Nf3+=) 5.d3 c6 6.Ba4 Nf6 7.a3 Na6 8.Bg5 Be7 9.Nf3 Qa5 10.Qd2 Nc5 11.Bb3 h6 12.Bf6 Bf6 13.0–0 d6 14.h3 g5 15.Na4 Qc7 (better is 15...Qd2!? 16.Nd2 Nb3 17.cb3 Be6+=) 16.Nc5+= dc5 17.Rab1 g4 18.Ne1 (better is 18.hg4!? Bg4 19.Nh2+=) 18...gh3–/+ 19.gh3? (better is 19.g3–/+) 19...Bh3–+ 20.Ng2 Bg5 21.Qe2 Qe7 (21...Rg8 22.Qf3 Bg2 23.Kg2 Bc1 24.Kh1 Ba3 25.Rg1+=) 22.Rfe1 (better is 22.Qh5!? Bg2 23.Kg2+=) 22...Rg8–+ 23.f3?? (better is 23.Qh5 Bg2 24.Kg2 Bd2 25.Kf1–+) 23...Bf4 24.Kf2 (24.Kf1–+) 24...Rg2 25.Kf1 Rh2 (25...Qg5 26.Bf7 Ke7 27.Rb7 Kf6 28.Qf2 Rf2 29.Kf2 Qg2) 26.Kg1 (26.Qg2 Bg2 27.Ke2 Bh1 28.Kf1 Rf2 29.Kf2 Qh4 30.Kf1 Qh3 31.Ke2 Qf3) 26...Qg5 27.Qg2 Qg2 0–1. 488 – dumbroad, ChessWorld.net, 2012.

3.g3 a5 4.Nf3=.

3.g3 g6 4.Bg2 (4.a4 Nb4 5.Bg2 d5+=) 4...Bg7 (4...a5 5.Nb5 ab4 6.c4=) 5.Rb1 Rb8 6.Nf3 Nf6 7.0–0 0–0 8.e4 e5 9.Re1 Re8 10.a3 d6 11.d4? (better is 11.Qe2=) 11...ed4–/+ 12.Nd4 (better is 12.Nd5 Ne4 13.Ng5–/+) 12...Ne5?? (better is 12...Nd4 13.Qd4 Ne4 14.Qe4 Re4 15.Ne4 Bb7–+) 13.f4 (worse is 13.Ncb5 c5 14.bc5 dc5+=) 13...Nc4 (better is 13...Bg4!? 14.Nce2 Nc4=) 14.Nc6+/– Qd7?? (better is 14...Bg4 15.Qd3 Qd7 16.Nb8 Rb8+–) 15.Nb8+– Qe6 16.Nb5 Bb7 (16...d5 17.Qd4 Ne4 18.Qa7+–) 17.Nc7 Qc8 18.Ne8 Ne8 19.Qd3 (better is 19.Bf1 Nb6 20.c4 Bf8+–) 19...Na3 (19...Nb6+–) 20.Ba3 Qb8 21.c4 Qa8 2.b5 Qb8 (22...Qc8 23.e5 de5 24.Bb7 Qb7 25.b6+–) 23.Red1 Bf8 24.b6 (better is 24.Bb2 Be7+–) 24...a6 (24...ab6 25.Rb6 Qa7 26.Qe3+–) 25.Rbc1 (better is 25.c5 dc5 26.Qd8 Qc8 27.Qc8 Bc8+–) 25...Bc6 26.Qe3 Qb7 27.Bb2 (better is 27.c5 dc5 28.Bc5 Bg7+–) 27...Bg7 28.Bg7 Kg7 29.Rb1 (29.c5 Nf6+–) 29...f6 30.Qe2 Kf7 31.e5 fe5 32.fe5 (better is 32.Bc6 Qc6 33.b7 Qc5 34.Kg2 Qc6 35.Kh3 Qd7 36.f5 e4+–) 32...de5 33.Bc6 Qc6 34.b7 1–0. alexp (2505) – grahamtrue (2240), net–chess.com, 2015.

2.d4 Bb7

3.Nc3 a6 4.e4 e6 5.Nf3 (5.a3=) 5...Ne7?? (better is 5...Bb4 6.Bd2 Nf6–/+) 6.h3 Nbc6 7.a3 h6? (7...Ng6 8.Be2+=) 8.Be2 (8.d5!? Na7 9.Be2+/–) 8...g6 9.Bb2 Bg7 10.0–0 f5 (10...0–0 11.a4+=) 11.e5 0–0 12.Re1 d6 13.d5 (13.Qc1!?+=) 13...ed5+= 14.ed6 Qd6 15.Bf1 Bc8 16.Rb1 d4 (16...f4+=) 17.Na2? (better is 17.Ne2!?=) 17...Re8 18.c4 Bb7 (18...Be6 19.Qc2 Ne5 20.Nd4 Bc4 21.Rbd1–/+) 19.c5? (better is 19.cb5!? ab5 20.Bb5=) 19...Qf6 20.Nc1 Nd5 21.Nd3 (better is 21.Re8 Re8 22.Ne2–/+) 21...Rf8?? (better is 21...Qf7–+) 22.Nde5 (22.Nd4 Nd4 23.Ne5 Nf4 24.Qd4 Be4+=) 22...Ne5+= 23.Nd4?? (better is 23.Ne5 Nc3 24.Bc3 dc3 25.Nd7+=) 23...f4 (23...Rfe8 24.Qb3 Qf7 25.Rbd1–+) 24.Kh1 (24.c6 Bc8 25.Nb5–+) 24...f3 (24...Qf7 25.Qb3–+) 25.g3?? (better is 25.Nf3 Nf4 26.Ne5+= (26.Re5?! Qf7 27.Re3 Nh3=)) 25...c6 (25...Qf7 26.Qb3–+) 26.Kh2 (26.Nc6 Bc6 27.Be5–+) 26...Nf4 (better is 26...Rae8–+) 27.gf4? (better is 27.Nf3 Nf3 28.Qf3+=) 27...Qf4–+ 28.Kh1 Rad8 (better is 28...Qf7!?–+) 29.Qb3+= Nf7?? (29...Qf7 30.Qf7 A) 30...Rf7 31.Ne6 Rd2 32.Ng7 (32.Re5 Rb2 33.Rb2 Be5–/+) 32...Rb2 33.Rb2+–; B) worse is 30...Nf7 31.Ne6 Bb2 32.Nd8 Rd8 33.Rb2+–; C) 30...Kf7+=) 30.Ne6+– Ne5 (30...Qh4 31.Bg7 Rd2+–) 31.Nf4 Kh7 32.Ne6 Rd2 33.Nf8 Bf8 34.Be5 Rf2 (34...Rd7 35.Rbd1 Rg7 36.Rd8 Bc5 37.Rh8 Kh8 38.Qf7 Bf8 39.Qf8 Kh7 40.Qg7) 35.Qf7 Bg7 36.Qg7 1–0. pillsbury (2145) – nimzou (1740), net–chess.com, 2014.

3.e3 a5 4.c3 (4.Bb5?? Bg2 (4...ab4?! 5.Nf3=) 5.ba5 Bh1–+) 4...ab4 5.cb4 Ra4 6.a3 (worse is 6.Bb5 Ra2 (worse is 6...Rb4 7.Bf1=; worse is 6...Bg2 7.Qa4 Bh1 8.Nd2+=) 7.Ra2 Bg2+=) 6...Nc6 (6...e6!?=) 7.Nc3 Nb4?? (7...Ra8 8.Bb2+=) 8.Nb5 (better is 8.Na4 Na6 9.Nc3 c6+–) 8...c6? (better is 8...Ra8 9.Rb1 Nc6+=) 9.Qa4+– cb5 (9...Nd3 10.Bd3 cb5 11.Qb5 Bg2+–) 10.Qb4 e6 11.Qb5 Qc7 (11...Bc6 12.Qb2 Nf6+–) 12.Bd3 (better is 12.Rb1 Bc6 13.Qb8 Qb8 14.Rb8 Ke7 15.Nf3+–) 12...Bg2+/– 13.Ke2 (better is 13.Rb1!? Bd6 14.Qg5 Qc3 15.Ke2 Bf1 16.Kf1 Qd3 17.Ne2 Qd1 18.Kg2 Qe2 19.Qg7+–) 13...Bh1= 14.Nh3 Be7 (14...Qh2 15.Nf4 Bd6+=) 15.e4?? (better is 15.Rb1+=) 15...Bg2?? (15...Qh2!? 16.Ng5 Nf6–/+) 16.Ng1?? Nh6 17.a4 Qh2+= 18.Nf3 Bf3 19.Kf3 0–0 20.Rb1 Qh3 21.Ke2 Qg4 22.f3? Qg2–+ 23.Kd1 Qf3 24.Be2 Qe4 25.Bg5 Bg5 26.Qb8 Qd4 27.Kc2 Qd2 28.Kb3 Rb8 29.Ka3 Rb1 30.Bc4 Qb2 (30...Be7 0–1. WirralBoy – nickb, ChessWorld.net, 2012.

3.e3 e6 4.Bb5?? (better is 4.Nf3=) 4...Bg2–+ (4...Bb4?! 5.c3 Bg2 6.Qg4 Bh1 7.Qg7–+) 5.Ne2 Bh1 6.Bb2 (6.Ng3 Bg2–+ (worse is 6...Bb4 7.c3–+)) 6...Bb4 7.c3 c6 8.Ba4 Be7 9.Kd2 Be4 10.Qg1 Bg6 11.Na3 Nf6 12.Nc4 d5 13.Ne5 Qc7 14.Qc1 Nbd7 15.Bc6 Rd8 16.Bd7 Nd7 17.Nd7 Rd7 18.Nf4 0–0 19.Qg1 e5 20.de5 Qe5 21.Ng6 fg6 22.Rb1 Qf5 23.Qf1 Qf2 24.Qf2 Rf2 25.Kd3 Rh2 26.Bc1 Ra2 27.Rb8 Kf7 28.Rh8 h6 29.Ra8 Bc5 30.Rb8 Rc7 31.e4 de4 32.Ke4 Bb6 (32...Bb6 33.Kd3 Rh2–+) 0–1. groovenetwork – Darkseid, ChessWorld.net, 2013.

2.e3 Ba6

3.a4+= ba4 4.Ra4 (4.Ba6 Na6 5.Ra4 Nb8+=) 4...Bf1= 5.Kf1 c6 6.Nf3 Nf6 7.c4 d5 8.Qb3 e6 9.Ba3 Bd6 10.c5 Bc7 11.b5 cb5 12.Qb5 Nfd7?? (12...Nbd7 13.Nc3=) 13.c6?? (13.Qb7!? Nc5 14.Bc5 Nd7 15.Ra7 Ra7 16.Qa7 Nc5 17.Qc5 Bd6 18.Qb5 Ke7+–) 13...Nc6?? 14.Qc6+– Be5?? 15.Ne5 Rc8 16.Qd7 Qd7 17.Nd7 Kd7 18.Ra7 Ke8 19.Re7 Kd8 20.Rf7 g5 21.Ke2 Ke8 22.Rg7 h6 23.Re7 Kd8 24.Re6 Kd7 25.Rd6 Ke7 26.Rd5 Ke6 27.Rd6 Ke5 28.d4 Kf5 29.Bc5 g4 30.h4 Rcd8 31.f3 Rd6 32.Bd6 gf3 33.gf3 Ke6 34.Be5 Rg8 35.Rh2 Rg1 36.Nc3 Rc1 37.Ne4 Rc2 38.Nd2 Kd5 39.e4 Kc6 40.d5 Kd7 41.Kd3 Ra2 42.f4 h5 43.Rg2 Ra3 44.Kc4 Ra2 45.f5 (45.f5 Ke8 46.f6+–) 1–0. Willi_weizenkeim – Flannery, playchess.de, 2006.

3.a4 c6+=.

3.Qh5 Nc6 4.a3= (< 4.Bb5 Nf6 5.Qe2 Nb4=+).

3.Qh5 g6 4.Qd5 c6 5.Qe5 (5.Qb3 Bg7 6.d4 Nf6=) 5...f6 (5...Nf6 6.a4=) 6.Qe4 (6.Qc3 Bb7=) 6...Bh6 (6...d5 7.Qh4=) 7.Bb2 f5?? (7...d5 8.Qh4=) 8.Qe5 (Better is 8.Qh4 Nf6 9.Qh6+–) 8...Nf6= 9.Qg3 0–0 10.Nf3 Nh5 11.Qh3 Bg7 12.Bg7 Ng7 13.Ng5 Nh5 14.Be2 e6 15.Nh7 Kh7–/+ 16.Bh5 gh5 17.Qh5 Kg7 18.0–0? Rh8–+ 19.Qf3 Kf8 20.Qg3 Qf6 21.Nc3 d5 22.Ne2 Qe7 23.c3 c5 24.a3 Bb7 25.Qe5?? Qh7?? 26.h3 Bc8 27.Nf4 Nc6 28.Qd6 Kg7?? 29.Qc6+– Rb8 30.Qc7 Kf6 31.Qb8 Ba6 32.Qd6 Qb7 33.Qe6 Kg7 34.Qf5 Rf8 35.Ne6 Kh8 36.Qf8 Kh7 37.Nc5 Qc6 38.Na6 Qa6 39.Qf7 1–0. Anden – alhambra, Live Game Caissa's Web, 2004.

2.e3 c6

(--> 1.b4 c6 2.e3 b5).

3.a4 (--> 2.a4 c6 3.e3).

3.Bb2 (--> 1.b4 c6 2.Bb2 b5 3.e3).

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

2.e3 g6

3.Bb2 Nf6 4.Bb5 c6 5.Be2 Bg7 6.Nf3 h6 7.a3 d5 8.0–0 Bf5 9.d3 Na6 10.Ne5 0–0 11.Nc6 Qc7 12.b5 Nc5 13.Bd4 Na4? (13...Qd6+–) 14.c4 Nb6 15.c5 Nbd7 16.a4 (better is 16.Ne7 Kh8 17.c6+–) 16...e5 17.Ne7 Kh8 18.Nf5 gf5 19.Bb2 Qc5 20.Ba3 Qb6 21.Bf8 Nf8 22.d4 e4 23.a5 Qd6 24.Qb3 Ng4 (24...Ne6+–) 25.Bg4 fg4 26.Nc3 g3 (26...Rb8 27.Nd5 Nd7 28.Rfc1+–) 27.fg3 Rd8 (27...Ne6 28.Rad1 Rb8 29.Rf7+–) 28.Rf7 Qg6 29.Ra7 Qg5 30.Re1 Kh7 31.b6 Nd7 32.Nd5 Nb6 33.Nb6 Rb8 34.Qd5 Qg6 35.Rb7 Re8 36.a6 Qg5 37.Qg5 hg5 38.a7 Kh6 39.a8Q Ra8 40.Na8 Bf8 41.Rb6 Kh5 42.Re6 Bb4 43.Rd1 Bc3 44.Re4 Bd4 45.Rdd4 Kg6 46.h4 gh4 47.gh4 Kh5 48.Rd5 Kh6 49.Re6 Kg7 50.Rd7 Kf8 51.Rde7 (51...Kg8 52.Rb6 Kf8 53.Rbb7 Kg8 54.Re8#; 51.g4 Kg8 52.Re8 1–0. Roookie – KissMe, Live Game Caissa's Web, 2004.

3.Bb5 Bg7 4.d4 c6 5.Be2 Na6 6.a3 Bb7 7.Nf3 Nf6 8.Bb2 0–0 9.c4 Ng4 (9...Nc7 10.Nc3+–) 10.c5 e6 (10...Nc7 11.Nc3+–) 11.h3 Nf6 12.Qc2 Nd5 13.0–0 Qf6 (13...Nac7 14.Nbd2+–) 14.Ne5 (better 14.g3+–) 14...Nab4?? (better 14...Qe7+–) 15.ab4 Nb4 (15...Qh4 16.Nd3+–) 16.Qc3 (16.Qb3 a5 17.Nd7 Qe7 18.Nf8 Bf8+–) 16...a5 (16...Nd5 17.Qd2 Qh4 18.Nc3+–) 17.Nd7 Qe7 (17...Qd8 18.Nf8 Kf8 19.e4+–) 18.Nf8 Qf8 (18...Kf8 19.Na3 Ba6 20.Nc4 Bc4 21.Bc4+–) 19.Nd2 Nd5 20.Qc2 Bf6 (20...Ba6 21.Nc4 Bc4 22.Bc4+–) 21.Ne4 Bg5 (21...Be7+–) 22.Ng5 f6 23.Ne4 (23.Ne6 Qc8 24.Nf4 Qd8+–) 23...f5 24.Nd6 Rb8 25.Ra5 Qh6 26.Nb7 (better 26.Qb3 Qf8 27.Nb7 Qe7+–) 26...Rb7 27.Ra8 Kf7 28.Rfa1 Ne3 29.Qd3 (29.Qc1 Ng4 30.R1a7 Qc1 31.Bc1 Ra7 32.Ra7 Kf6 33.hg4 fg4 34.Rh7 e5 35.d5 g3 36.dc6 g5 37.Bb2 Ke6 38.c7 g4 39.c8Q Kd5 40.Qd7 Ke4 41.fg3 Ke3 42.Qd3) 29...Nd5 30.R1a7 Qc1 31.Bc1 Ra7 (31...Rc7 32.Rc7 Nc7 33.Ra7 f4 34.Rc7 Kf6 35.Qe4 g5 36.Bg4 e5 37.Qc6) 32.Ra7 Kf6 (32...Ne7 33.Bg5 Kf8 34.Qb1 h6 35.Qb8 Kg7 36.Re7) 33.Bh6 (33.Qg3 f4 34.Qh4 g5 35.Qh6 Kf5 36.Bd3) 33...Nf4 (33...Nc7 34.Rc7 g5 35.Qe3 e5 36.Qe5 Kg6 37.Qe6) 34.Qf3 (34.Bg7 Kg5 35.Qg3) 34...Ne2 (34...g5 35.Bg5! Kg6 36.Bf4 h5 37.Qh5 Kf6 38.Qf7) 35.Qe2 g5 36.Qe6! Ke6 37.Bg5 Kd5 38.Be3 h5 39.g3 Kc4 40.Rb7 Kd3 41.Kf1 (41.d5 f4 42.Bf4 cd5 43.c6 d4 44.c7 Ke4 45.c8Q Kd3 46.Rb3 Ke2 47.Qc2 Ke1 48.Rb1) 41...Ke4 42.Rb6 Kd5 43.Ke2 Ke6 44.Rc6 Kd7 45.Rd6 Kc7 (45...Kc8 46.Bf4 Kb7 47.c6 Kb6 48.h4 Kc7 49.Rg6 Kb6 50.c7 Kb7 51.d5 Kc8 52.Rc6 Kd7 53.c8Q Ke7 54.Qg8 Kd7 55.Rc7) 46.Bf4 Kb7 47.Re6 Kc8 (47...h4 48.c6 Ka6 49.c7 Ka5 50.c8Q Kb5 51.Qa6 Kb4 52.Rb6 Kc3 53.Qd3) 48.Re7 (48.c6 Kd8 49.h4 Kc8 50.Re8) 48...Kd8 49.Rh7 Ke8 (49...h4 50.c6 hg3 51.fg3 Ke8 52.c7 Kf8 53.c8Q) 50.c6 Kf8 (50...Kd8 51.Bd6 Ke8 52.c7 f4 53.c8Q) 51.c7 Kg8 52.Rd7 Kf8 53.c8Q 1–0. GuestQVBQ – GuestBTKK, freechess.org, 2017.

2.e4 Ba6

3.a4 c6 4.ab5 Bb5 5.c4 e5?? 6.cb5 Bb4 7.bc6 Nc6 8.Qg4 g6 9.Ba3 Nf6 10.Qh4 Ba3 11.Ra3 Rb8 12.Nc3 Nd4 13.Ra6 0–0?? 14.Qf6 Qc7 15.Bd3 Rb2 16.Nge2 Nc2 17.Bc2 Rc2 18.Nd5 Rc1 19.Nc1 Qc1 20.Ke2 Qc4 21.d3 1–0. rekt – rsham, internet, 2001.

3.Nc3 Nc6 4.Bb5 (4.Nb5 Nb4 5.a3 Nc6+=) 4...Bb5= 5.Nb5 e5 6.a3 Nd4 (6...a5!? 7.ba5 Ra5+/–) 7.Nd4+– ed4 8.d3 h6 9.Nf3 c5 10.bc5 Bc5 11.0–0 Nf6 12.Bd2 (12.Bb2!? d5 13.Bd4 Bd4 14.Nd4 de4 15.de4 0–0+–) 12...0–0+/– 13.Bb4 Bb4 14.ab4 Qb6 15.Rb1 Qb5? (better is 15...Rfe8!?+/–) 16.Nd4+– Qb6 17.Nf5 d5 18.Ne7 Kh8 19.Nd5 (19.ed5?! Qd6 20.Nf5 Qd5+–) 19...Nd5 20.ed5 Rad8 21.c4 a5 22.ba5 Qc5 (22...Qa5 23.Qf3+–) 23.Rb5 Qd4 24.Kh1 Rb8 25.Qb3 (25.Qa1 Qf4+–) 25...Ra8 (25...Rb5 26.cb5 Rc8 27.Kg1+–) 26.c5 Qe5 27.c6 Qe2 28.Kg1 Rfe8 (28...Qe5 29.Rc1+–) 29.c7 (better is 29.d6 Rf8+–) 29...Qd2 (29...Qe5 30.Rc5 Rac8+–) 30.d6 Rg8 (30...Qf4 31.d7 Qc7 32.de8R Re8 33.a6+–) 31.d7 Qe2 32.d8Q (better is 32.Rb8 Rab8 33.Qb8 f5+–) 32...Rgd8 33.cd8Q Rd8 34.Qf7 (better is 34.Rb8 Kh7 35.Rd8 Qe7+–) 34...Qd3 35.Rb7 Rg8 36.Qb3 Qd8 (36...Qd6+–) 37.a6 Qa8 38.a7 Qe8 39.Rb8 Qb8 40.ab8Q Rb8 41.Qb8 Kh7 42.Qe5 1–0. zucchini – edog13, ChessWorld.net, 2015.

2.Nf3 d5

3.e3 a6 4.Be2 (4.a4 e6+=) 4...Bg4 (4...e6 5.c3=) 5.0–0 Bf3 6.Bf3 Nf6 7.d3 e6 8.Bb2 (8.a4!?=) 8...Bb4=+ 9.Nd2 Bd2 (9...0–0 10.Rb1 Bd6 11.c4=+) 10.Qd2 0–0 11.h3 (11.a4 Nbd7=+) 11...c6 12.Rfe1 h6 (12...Nbd7 13.e4–/+) 13.a4=+ ba4 14.Ra4 Nbd7 15.Rea1 Qc8 16.Be2 Nc5 (16...c5 17.c4=) 17.R4a2 Qd8 (17...Ncd7 18.Bf6 Nf6 19.d4=) 18.Bd4 Nfd7? (better is 18...Ncd7!?+=) 19.Qc3 Qe7 20.Bg7 Rfb8 21.Bh6 Qf6 (21...e5!? 22.d4 Qh4 23.dc5 Qh6+–) 22.Qf6 Nf6 23.Bg5 Nh7 24.Bf4 Rd8 25.f3 Nf6 26.Bg5 Kg7 27.d4 Ncd7 28.Ra6 Ra6 29.Ra6 Rc8 30.Bh4 Kf8 31.Be1 c5 32.c3 cd4 33.cd4 Rc1 34.Kf2 Kg7 35.Bd2 Rc2 36.Ke1 Nh5 37.Bd3 Rb2 38.Ra7 Nhf6 39.g4 Nf8 40.h4 Ng6 41.h5 Nh4 42.Be2 Ng2 43.Kd1 Rb1 44.Kc2 Rb8 45.Bd3 Rc8 46.Kd1 Re8 47.Bf1 Nh4 48.Ke2 e5 49.Be1 ed4 50.Bh4 Re3 51.Kf2 Ng8 52.Rd7 Nf6 53.Bf6 Kf6 54.Rd5 Re8 55.Bd3 Rh8 56.Rd4 Rh6 57.Kg3 Ke5 58.Re4 Kd5 59.Rf4 f6 60.Be4 Ke5 61.Bg6 Rh8 62.Re4 Kd6 63.Kf4 Kd5 64.Kf5 Rf8 65.Re6 Kd4 66.Rf6 Rd8 67.h6 Rd5 68.Kf4 Kc3 69.h7 Rd4 70.Kg3 Rd8 71.Be4 Kc4 72.Rg6 Kc5 73.Rg8 Rg8 74.hg8Q Kd4 75.Qd5 Kc3 76.Qd3 Kb4 77.Bd5 Kc5 78.Qc4 Kd6 79.f4 Ke7 80.f5 Kf6 81.Kf4 Ke7 82.g5 Kf8 83.f6 Ke8 84.g6 Kd7 85.g7 Kd8 86.f7 Ke7 87.f8Q Kd7 88.Qc6 1–0. guerino (2100) – iboyd (1950), net–chess.com, 2006.

2.f4 Bb7

3.Nc3 a6 4.Nf3 f5 5.a4 Nf6 6.ab5 ab5 7.Ra8 Ba8 8.Nb5 c6 9.Nbd4 e6 10.Ba3 Na6 11.c3 Be7 12.e3 0–0?? (better is 12...Nc7+/–) 13.Ba6+– Ne4 14.Bc4 d5 15.Be2 Qd7 16.Ne5 Qc8 17.0–0 Nd6 18.Qa4 Ne4 19.Nec6 Bc6 20.Nc6 Bd6 21.b5 Nd2 (21...Ba3 22.Qa3 Qb7+–) 22.Bd6 Nf1 (22...Rf7 23.Ra1 Ne4+–) 23.Ne7 Kh8 24.Nc8 Rc8 25.Bf1 1–0. b4_player – jan, internet, 2013.

3.Nc3 e6 4.e3 c6 (4...Qh4 5.Ke2+=) 5.a4 (5.a3 a5 6.ba5 Qa5=) 5...a6 (5...Bb4 6.Bb2+=) 6.Nf3 (6.Rb1!?=) 6...Bb4–/+ 7.Bd3 d5 8.0–0 Nf6 9.Ne5 Kf8 (9...Bc3!? 10.dc3 Nbd7–/+) 10.Ne2 ba4 11.Rb1 c5?? (better is 11...Qe7+=) 12.c3+/– Ba3?? (better is 12...a5 13.Qa4 Ba6 14.cb4 ab4 15.Ba6 Ra6+–) 13.Ba3+– (13.Rb7 Bc1 14.Nc1 c4 15.Nf7 Qc8+–) 13...Qc7 14.Bc5! Qc5 15.Rb7 Nfd7 16.Rd7 f6 17.Nd4 Ke8 18.Qh5 g6 19.Bg6! hg6 20.Qg6 (20.Qg6 Kf8 21.Ne6) 1–0. b4_player – mikrus, casual, 2013.

2.g3 Bb7+=

3.Nf3 e5 4.Bb2 e4 5.Nd4 e3+=.

3.Nf3 e5 4.c3 d6 (4...a5 5.ba5 e4 6.Nd4+=) 5.Bg2 Be7 6.0–0 h6. TheWelshKnight – 19larry, ChessWorld.net, 2014.

3.Nf3 e5 4.Bg2 Bb4 5.a3 (5.0–0 e4 6.Nd4 a6+=) 5...Bc5–/+ 6.Bb2 d6 7.0–0 Nf6 8.c4 (8.d4 ed4 9.Bd4 Bd4 10.Nd4 Bg2 11.Kg2 a6–/+) 8...a6 (8...bc4!? 9.Qc2 e4–+) 9.cb5 ab5 10.Qb3 (better is 10.d4 ed4 11.Bd4–/+) 10...Qd7?? (better is 10...Bd5 11.Qc2 Nbd7–/+) 11.Ne5+= de5 12.Bb7 Ra7 13.Bc8?? Qc6?? 14.Rc1 Qd6 15.Qb5+/– Nbd7 16.Bd7 Nd7 17.Nc3 f5 18.e4 0–0 19.Qc4+/– Kh8 20.Nb5 Qd2 21.Rc2+– Bf2 22.Kf1 Qe3 23.Rf2 Nb6? 24.Qb4 c5 25.Qd2 Qd2 26.Rd2 fe4 27.Rf2 Raf7 28.Rf7 Rf7 29.Ke2 e3 30.Be5 Nc4 31.Rd1?? h6?? 32.Rd8 Kh7 33.Bf4 g5 34.Be3 Re7 35.Rd3 Ne5 36.Bc5 Nd3 37.Be7 Nb2 38.Nc3 Nc4 39.a4 1–0. Joie,Sebastien – Fournier,Frederic, Match Active, 1999.

3.Nf3 Nf6 4.Bg2 Nc6 (4...a5 5.ba5 Ra5 6.0–0=+) 5.a4= Ne5 (5...a6!?=) 6.ab5+= Nf3 (6...e6 7.0–0 Nf3 8.Bf3+=) 7.Bf3+– Bf3 8.ef3 e6 9.Ba3 Nd5 10.Nc3 Nc3 (10...Nb4 11.0–0+–) 11.dc3 d5 (11...a6 12.ba6 Ra6 13.0–0+–) 12.Qd4 f6 (12...Be7!?+–) 13.0–0+– Bd6 14.Rfe1 Qd7? (better 14...Kf7+–) 15.Qd5 Kf7 16.Qd3 Rad8 (16...Rhd8 17.Bb2+–) 17.Bb2 Rhe8 (17...Ra8 18.c4 Rhd8 19.c5+–) 18.Ra7 Qc8 (18...Kg8 19.Rd1+–) 19.Qh7 (19.b6 Qb8 20.Qa6 Rd7+–) 19...Rh8 (19...Qb8 20.Qh5 Kg8 21.Ra4+–) 20.Qe4 Rh5 (20...e5 21.b6 Qh3 22.bc7 Qh2 23.Kf1+–) 21.Qc6 (better 21.c4 Bb4 22.b6+–) 21...Rdh8 (21...Qd7 22.c4 Qc6 23.bc6 Rdh8+–) 22.Qd6 Rh2 23.Rc7 Kg6 24.Kf1 (24.Rc8?? Rh1 25.Kg2 R8h2) 24...Rh1 (24...Qd8 25.Rd7 Rh1 26.Ke2 Re1 27.Ke1+–) 25.Ke2 Re1 26.Ke1 Qa8 27.Qd3 f5 28.c4 Rh1 29.Ke2 Rh7 (29...Qf8 30.Qd7 Qg8 31.b6 Kh6 32.Bg7 Kg6 33.Qe7 Qg7 34.Qg7 Kh5 35.f4 Re1 36.Ke1 e5 37.Qg5) 30.Qd7 Qa2 (30...Qg8 31.b6 Kh5 32.b7 Rh6 33.Rc8 Qh7 34.b8Q Rg6 35.Rh8 Qh8 36.Qh8 Rh6 37.Qhg7 Rg6 38.Qe8 e5 39.Qgg6) 31.Qf7 Kg5 (31...Kh6 32.Bc1 f4 33.Bf4 g5 34.Qh7) 32.Bc1 f4 33.Bf4 1–0. Pierre – GuestMaack, internet, 2020.

2.a4 ba4

3.Ra4 a5 4.e4 e5 5.ba5 Bc5 (5...c6 6.Bc4 Ra5 7.Ra5 Qa5 8.Qf3) 6.Nf3 Nc6 (6...d6 7.d4 Bd7 A) < 8.dc5 Ba4 9.Nc3 Bc6=+ (< 9...Ra5 10.Na4 Nd7 11.Nc3+/–); B) 8.Ra2 ed4 9.Nd4) 7.Ne5 f6?? (better is 7...Ne5 8.d4 Nc6 9.dc5 Ra5 10.Ra5 Na5+–) 8.Qh5+– g6 9.Ng6! Bf2 (9...hg6 10.Qh8) 10.Kf2 Nge7 (10...hg6 11.Qh8 Nce7+–) 11.Nh8 Kf8 12.Qf7 1–0. MrkT – chuckturnerir, internet, 2005.

3.Bb2 d6 4.Nf3 e5 5.e3 Bd7 6.Nc3 a5 7.b5 c6 (7...Nf6 8.Ra4 c6 9.Bd3=) 8.Be2 (8.d4 cb5 9.Nb5 e4+=) 8...cb5 (8...Nf6 9.0–0=) 9.Nb5 Qb6 (9...Nc6 10.d4 e4 11.Nd2+=) 10.c4 Nc6 11.0–0 Nb4 12.Qa4 Bb5 (12...e4 13.Nfd4+–) 13.cb5 Nf6 14.Bc3 Qc5?? (better 14...Nfd5+–) 15.Bb4+– (15.Bb4 Qb6 16.Ba5+–) 1–0. DEFFM – pateupegui, freechess.org, 2018.

3.Bb2 Nf6 (--> 2.Bb2 Nf6 3.a4 ba4).

3.b5 c5 4.Bb2 (4.e3 d5+=) 4...d5 5.e3 (5.Nf3 Nf6+=) 5...e5 (5...Nf6 6.Nf3+=) 6.Be5+– f5 (better 6...Nd7!? 7.Bg3 Ngf6+–) 7.Qh5 Ke7 (7...g6 8.Qf3 Nf6 9.Bf6 (9.Ra4?! Nbd7 10.Bf6 Nf6+=) 9...Qf6 10.Nc3+–) 8.Qh4 (better 8.Nc3 Nf6 9.Bf6 Kf6 10.Nh3+–) 8...g5?? (8...Ke8 9.Qa4 Nd7+–) 9.Qg5 Kf7 (9...Kd7 10.Qf5 Ke7 11.Qg5 Kd7 12.Qg4 Ke7+–) 10.Qd8 Nc6 11.Qd5 Be6 12.Qc6 a5 13.Nf3 c4 14.Ng5 Kg6 15.Qe6 Nf6 (15...Kh5 16.Be2 Kh4 17.Qf5 Nf6 18.g3) 16.Qf6 (16.Qf6 Kh5 17.Be2 Kh4 18.g3) 1–0. DEFFM – GuestSLVX, freechess.org, 2018.

3.b5 e6 4.Bb2 f6 (4...a6 5.Ra4 Nf6 6.Nf3=) 5.e3 Bb7 6.Ra4 c6 7.c4 (7.Nf3 cb5 8.Bb5 Qb6=) 7...a6= 8.Nc3 ab5 9.Ra8 Ba8 10.Qa1 Bb7 11.cb5 cb5 12.Nb5 Bc6 13.Nf3 Bf3 14.gf3 Qb6 (14...Nc6 15.Qa6=) 15.Bd3 Bc5 (15...d5 16.Qb1=) 16.0–0 (16.Rg1 Bf8+=) 16...Ne7 17.Qc1 (17.Qa4 0–0=) 17...0–0 18.Qc2 f5 19.Ra1 Rc8? (better 19...d5=) 20.Qc3+– Kf8 (20...e5 21.Qe5 Qg6 22.Kh1+–) 21.Qg7 Ke8 22.Qh8 Ng8 (22...Kf7 23.Qh7 Ke8+–) 23.Qg8 Bf8 24.Be5 Nc6 25.Nd6 Ke7 (25...Kd8 26.Qf8 Kc7 27.Qc8) 26.Qg5 1–0. DEFFM – GuestNXNK, freechess.org, 2018.

3.c3 ba4 4.Qa4 e5 5.e3 Bb7 (5...Nf6 6.d3=) 6.Ba3 (better is 6.Qb5!? Bc6 7.Qe5 Ne7 8.d4+/–) 6...Qg5 7.Qb5 Bg2 8.Bg2?? (8.Nh3 Bf1 9.Rf1= (9.Ng5?? Bb5 10.d4 a5–+)) 8...Qg2–+ 9.Ke2 Qh1 10.Nf3 Qg2 (better is 10...Nc6 11.Qb7 Rd8 12.Qc7 Nf6–+) 11.Qb7= Qg4 (11...Nc6 12.Qa8 Nd8 13.d3=) 12.Qa8 Qc4?? (better is 12...e4 13.Qb8 Ke7 14.b5 Ke6 15.Qe8 Ne7 16.Be7 Qf3 17.Ke1 Qh1 18.Ke2 Qf3 19.Kf1 Qh1 20.Ke2 Qf3=) 13.Ke1 Qb5 14.Ne5?? Qe5? 15.Qb8+– Ke7 16.b5 d6 17.Qc7 Kf6 18.f4 Qh5? 19.Bd6 Bd6 20.Qd6 Kf5 21.Qe5 Kg6 22.Qh5 Kh5 23.Ra7 Nh6 24.Na3 Ng4 25.Rf7 g6 26.b6 1–0. maddoxdb – lrburk, gameknot.com, 2013. (=1.c3 b6 2.b4 b5 3.a4 ba4)

3.c3 e5 4.Qa4 Nf6 5.d3 Bd6 6.Nf3 0–0 7.Bg5 h6 8.Bh4 Nc6 9.Nbd2 Bb7 10.e3 Be7 (10...a5 11.b5 (11.ba5?! Ra5 12.Qd1 Ra1 13.Qa1 Qe7=) 11...g5 12.Ng5 hg5 13.Bg5+/– (13.bc6? Bc6 14.Qc4 gh4–+)) 11.b5+/– Nb8 12.Ne5 a6 13.Qb3 Bd6 (13...Bd5 14.c4 ab5 15.Ra8 Ba8 16.Qb5+/–) 14.Nec4 Be7 15.b6 cb6 16.Qb6 Qb6 17.Nb6 Ra7 18.d4 Re8 19.Nbc4 Bd5 20.Rb1 Nc6 21.Bf6 Bf6 22.Nd6 Re6 23.Nc8 Rc7 24.Nb6 (24.Ba6 Nd4 25.Rb8 Bg2 26.Nb6 Kh7 27.cd4 Bh1 28.Bd3 g6–/+) 24...Ne7 25.c4 (25.Ba6?! Bg2 26.Rg1 Bd4 27.Nd7 Ba7 28.Rg2 Ra6+=; 25.Nd5?! Nd5 26.Bc4 Nc3 27.Rb8 Kh7 28.Be6 de6+/–) 25...Be4 26.Ne4 Re4 27.Kd2 Re6 28.c5 Ra7 29.g3 Rc6 30.Bg2 Rcc7 31.Rhc1 Ng6 32.Nd5 Rc6 33.Rb8 Kh7 34.Be4 Re6 35.Bf5 Rc6 36.h4 h5 37.g4 hg4 38.h5 (38.h5 Bg5 39.hg6 fg6 40.Bg4+–; 38.Bg4?! Nh4 39.Nb6 Rcc7+–; 38.Nf6?! Rf6 39.e4 Kh6+–) 1–0. Baroin,Bernard (2015) – Rogers,Henry, IECG, 2004.

3.c3 e6 4.Qa4 Bb7 5.d3 c5 6.bc5 Bc5 7.Ba3 Bc6 8.Qc2=.

3.c3 g5 4.d4 h6 5.Nd2 Bb7 6.Qa4 Bc6 7.Qc2 Qc8 8.e4 Nf6 9.Bd3 a6 10.Ne2 Ra7 11.0–0 Qb7 12.d5 Bb5 (12...Nd5 13.ed5 Bd5 14.Ne4+–) 13.c4 Bc4 14.Nc4 Qb4 (14...Ra8+–) 15.Rb1 Rb7 16.Ba3 Qb1 17.Rb1 Bg7 (17...Rb5+–) 18.Nd6! Kf8 (18...cd6 19.Qc8) 19.Rb7 Kg8 20.Rb8 Bf8 21.Nf5 Kh7 22.e5 Nd5 23.Ne7 Kg7 24.Nf5 Kh7 25.Nfg3 Kg7 (25...Kg8 26.Rf8 Kg7 27.Nh5) 26.Nh5 Kg8 27.Rf8 1–0. Taulien,Hans_Juergen – Flick,Jeff, remoteschach.de, 2002.

3.c3 g6 4.d4 Bg7 5.e4 Nf6 6.Nd2 0–0 7.Qa4 Bb7 8.Qb5 Nc6? (better is 8...Bc6 9.Qd3 Bh6+/–) 9.Qb7+– Rb8 (9...a6 10.b5 Ra7 11.bc6 Rb7 12.cb7 c5+–) 10.Qa6 Rb6 11.Qd3 d6 12.Ngf3 e6 13.Be2 e5 (13...Rb7 14.0–0+–) 14.b5 Na5 (14...Ne7+–) 15.Ra5 Qd7 (15...Qb8 16.de5 Ng4 17.Nc4 de5 18.h3+–) 16.de5 de5 17.Nc4 c6 (17...Qd3 18.Bd3 Rb7 19.Nce5+–) 18.Qd7 Nd7 19.Nb6 (19.Ra7 cb5 20.Nb6 Nb6 21.Bb5 Ra8+–) 19...Nb6 (19...ab6 20.Ra7 Nc5 21.bc6 Ne4 22.Ba3+–) 20.bc6 Nc8 (20...Rc8 21.Ra7 Rc6 22.Be3+–) 21.c7 Re8 22.Ba6 (better is 22.Rd5 Bf6+–) 22...Kf8 23.Ba3 Kg8 24.Rd5 Re7 25.Rd8 Bf8 26.Bc8 Kg7 27.Bb7 Rc7 28.Bf8 Kf6 29.Rd6 1–0. Baumann,Heinz – Pieleck,Kerstin, RSX9E – A00 – Sokolsky–1, 2002.

3.Nc3 a5 4.b5 (4.Ra4 Bb7=) 4...e6= 5.e4 a3 (5...Bb7 6.Nf3=) 6.Nf3. pcmvr – paull, net–chess.com, 2018.

3.Nc3 c5 4.bc5+= e6 (4...e5 5.Nf3 Nc6 6.Ba3+=) 5.Na4 (better 5.d4+–) 5...d6? (5...Bb7 6.d4+–) 6.cd6?? (better 6.Nb6! ab6 7.Ra8+–) 6...Bd6+– 7.Nf3 Nf6 8.e3 (8.Ba3 e5+=) 8...0–0 9.Be2 (9.Ba3 e5+=) 9...Nc6 (9...e5 10.Bb2 Nc6 11.0–0+=) 10.0–0 (10.d4 Rb8+–) 10...Bb7 (10...e5 11.Bb2+=) 11.Bb2 (11.Ba3 Ba3 12.Ra3 Qd6+–) 11...Rc8 (11...e5 12.Nc3+=) 12.Qb1 (12.c4 e5+–) 12...Ba8 (12...Na5 13.Bc3 Rb8 14.Nb2+–) 13.Nc3+– Rb8 14.Qa2 (14.Nb5!?+–) 14...Nb4+= 15.Qb1 (15.Qa7 Nc2 16.Rab1+=) 15...Nc6+– 16.Qc1 (16.Nb5 a5+–) 16...Ne5 (16...Qd7 17.Nb5 Be7 18.Nbd4+–) 17.Ne1 (17.Ne5 Be5 18.f4 Bc3 19.Bc3 Qd5+–) 17...Qc7 (17...Qd7 18.Ba3+–) 18.Ba3 (18.Nb5 Rb5 19.Bb5 Rb8+–) 18...Rfd8 (18...Nc4 19.Bd6 Nd6 20.Qa3+–) 19.Bd6 (19.Nb5 Ba3 20.Qa3 Rb5 21.Bb5 Bg2 22.Kg2 Qb7 23.Kg1 Qb5 24.Qa7 Nc6+–) 19...Qd6 20.Ra7 Qd2 21.Qd2 Rd2 22.Nd3 Rc2 (22...Ned7 23.Rc1 Rc8 24.Kf1 Rc3 25.Ra8 Nf8 26.Ra2+–) 23.Ne5 Rc3 24.Rfa1 (24.Nf7 Be4+–) 24...Bd5 (24...Be4 25.Nf7 h6 26.Ne5+–) 25.Nf7 (25.Rf7 Rb2 26.Bd3 Ng4 27.Bh7 Kh7 28.Ng4 Ra3+–) 25...h6 26.Ne5 Rcb3 (better 26...Rb2 27.Bd3 Be4+–) 27.Bf3 (better 27.Bd3+–) 27...Rb1=+ 28.Bd1 Ra1 (better 28...Ne4 29.f3 Nc3=+) 29.Ra1+– Ne4 (29...Rb2 30.f3+–) 30.Bf3 (30.f3 Nc3+–) 30...Nc3 (30...Nf6 31.Bd5 ed5 32.h3+–) 31.Bd5 Nd5 (31...ed5 32.h4+–) 32.Re1 (32.h4 Rb5+–) 32...Rb2 33.Nf3 (33.g3 Ra2+–) 33...Nc3 34.Kf1 e5? (better 34...Kf7+=) 35.Re2?? (better 35.Ne5 Kf8 36.e4+–) 35...e4 (better 35...Re2 36.Ne5 Rb2–+) 36.Re1 (better 36.Rb2 ef3 37.gf3+–) 36...ef3–+ 37.gf3 Nd5 (37...Kf7 38.h4–+) 38.Kg2 (38.f4 g6–+) 38...Nf6 (38...g5 39.Kg3–+) 39.f4 (39.Ra1 Kh7–/+) 39...Rb5 (39...Ng4 40.Kf3 Nf2 41.Re2 Re2 42.Ke2–+) 40.Rf1 (40.e4 g6–/+) 40...Rh5 (40...Ne4–+) 41.Kf3 (41.Rc1 Ra5–/+) 41...Rf5 (better 41...Rh2!? 42.Ra1 Rh3 43.Kg2 Rh5–+) 42.Kg2 (better 42.e4 Rc5 43.Re1–/+) 42...Rh5 43.Kf3 Rf5 (better 43...Rh2!? 44.Re1 g6–+) 44.Kg2–/+ g5 45.Rg1 (45.fg5!? Rg5 46.Kf3 Rf5 47.Kg2–/+) 45...gf4–+ 46.Kf3 Kf7 47.e4 (47.ef4 Nd5–+) 47...Rb5 (47...Rh5!? 48.Kf4 Rh4 49.Kf3 Re4 50.h3–+) 48.Kf4 Rb3 (better 48...Rh5!?–+) 49.f3–/+ Rb5 50.e5 (50.h4!?–/+) 50...Nh5–+ 51.Kf5 (51.Ke4 Rb4 52.Ke3 Rh4–+) 51...Ng7 52.Kf4 (52.Ke4 Ne6 53.Ra1 Rb4 54.Kd5 Rd4 55.Kc6 Rd3–+) 52...Ne6 (52...Rb4 53.Ke3 Nf5 54.Kd3 Rd4 55.Ke2–+) 53.Kf5 Rb4 54.Rg4 Nd4 (54...Ng7 55.Rg7 Kg7 56.f4–+) 55.Kf4 (better 55.Ke4 Nc6 56.Kd5 Ne7 57.Kd6 Nf5 58.Kc6–+) 55...Ne6 (better 55...Nc6!? 56.Kg3 Rg4 57.fg4 Ne5–+) 56.Kg3 (56.Kf5 Ng7 57.Rg7 Kg7–+) 56...Rg4 (better 56...Rb5 57.Re4 h5–/+) 57.Kg4?? (better 57.fg4 Nc7 58.Kf4=+) 57...Kg6–+ 58.f4? (58.Kh4–+) 58...h5 59.Kf3 Kf5 60.Ke3 Nf4 61.Kf3 (61.Kf2 Ke5 62.Kg3 Kf5–+) 61...Ne6 (61...Ke5 62.Kg3–+) 62.Ke3 (62.Kg3 Ke5 63.Kh4 Ng7–+) 62...Ke5 63.Kf3 Kf6 64.Kg3 Kg6 (64...Kg5 65.Kh3–+) 65.Kh4 Kh6 66.Kh3 Ng7 (66...Nf4!? 67.Kg3 Kg5 68.Kf3–+) 67.Kg3 Kg6 (67...Kg5 68.Kh3–+) 68.Kg2 (68.Kf4 Kf6–+) 68...Kg5 (68...Nf5 69.Kf3–+) 69.Kf2 (69.Kg3 Nf5 70.Kf3 Kh4–+) 69...h4 (69...Kg4!? 70.Kg2–+) 70.Kg2 Kg4 71.Kg1 Nh5 (71...Kh3 72.Kh1 Ne6 73.Kg1–+) 72.Kh1 Kf4 (72...Nf4 73.Kg1–+) 73.Kg1 Kg4 (73...Kf3 74.Kf1 Ng3 75.Kg1 Ne2 76.Kh1–+) 74.Kh1 Kh3 75.Kg1 Nf4 76.Kh1 Ne2 ½–½. FeegLood (2805) – MeneerMandje (2660), lichess.org, 2017.

3.Nc3 e6 4.b5 Bb7 5.Ra4 Nf6 6.Nf3 (6.e4 c6=) 6...Be7 (6...a6 7.ba6 Ra6 8.Ra6 Na6 9.e4=) 7.d3 (7.e4 0–0=) 7...0–0 8.h4 (8.e4 a6=) 8...Nd5 (8...c6 9.e4=+) 9.Nd5= Bd5 10.Rg4 (10.e4 Bb7=) 10...a6 11.e4 (11.Bh6 Bf6=+) 11...Bb7 (better 11...f5 12.Rg3 fe4 13.de4 Be4–/+) 12.Bh6+– g6 13.Bf8 Bf8 14.h5 ab5 15.hg6 hg6 16.Qd2 (16.Qb1!?+–) 16...Bg7+= 17.Ke2 d5 18.e5 (18.Rgh4 c5+=) 18...d4 (18...c5 19.Rgh4 Nc6 20.Rh7 Be5 21.c3=+) 19.Ng5 (19.Nd4 Ra4 20.Rhh4 Nd7 21.Nb5 Rg4 22.Rg4 Ne5+–) 19...Nd7 (19...Ra2 20.Rh7 Qd7 21.Rf4+–) 20.Rh7 (better 20.Rd4 Qe8 21.Rdh4 Ne5 22.Rh7+=) 20...Ne5–/+ 21.Rgh4 c5?? (better 21...Qf6–/+) 22.Rg7+– Kg7 23.Rh7 (23.Qf4!? Bd5 24.Qe5 f6 25.Rh7 Kg8+–) 23...Kg8 24.Qf4 The mate threat is Qxe5 24...Qc7?? (better 24...Qg5 25.Qg5 Kh7 26.Qe5 Bd5+–) 25.Ne6! Qd6 (25...fe6 Exploits the pin 26.Rc7) 26.Rg7 Kh8 27.Qh6 (27.Qh4) 1–0. pdchessvamp (2245) – retiponziani (1925), ChessWorld.net, 2012.

3.c4 c5 4.bc5 e5 5.Ba3 Nc6 6.Nc3 Nf6 7.Qa4 Qa5 8.Qa5 Na5 9.e3 Nb3 10.Rb1 Nc5 11.Nf3 a6 12.Ne5 d6 13.Nf3 Be7 14.d4 Ne6 15.Bd3 0–0 16.g4! Rd8 (16...Ng4 17.Nd5 Combination) 17.g5 Ne8 18.Nd5 Ng5?? (better is 18...Bg5 19.Nb6 Rb8+–) 19.Ne7 Kf8 20.Ng5 (20.Ng5 Ke7 21.c5+–) 1–0. pierred (2760) – croach (2355), net–chess.com, 2011.

3.c4 Nc6 4.Qa4 Nf6 5.Nf3 g5 (5...e6!? 6.b5 Nb4=) 6.b5 Nb8 (6...g4 7.bc6 gf3 8.ef3 dc6 9.Qc6 Bd7 10.Qc5+/–) 7.Nc3 (7.Ng5 a6+/–) 7...g4+= 8.Nd4 (8.Ne5 a6+=) 8...Rg8 9.e3 Rg5 (9...a6 10.Bb2+=) 10.h4 (10.f4 gf3 11.Nf3 Rg8+=) 10...Rh5 11.Nde2 1–0. pierre – toppon, internet, 2010.

3.e3 a6 4.Be2 (4.Ra4 e6+=) 4...Bb7 (4...e5 5.Ra4 Bb7 6.Nf3=) 5.Nf3 Nc6 (5...e5 6.Ne5 Bg2 7.Rg1=) 6.b5 (6.c3!?+=) 6...ab5+= 7.Bb5 e6 (7...e5 8.d3+=) 8.Bb2= Nf6 9.c4 The pressure on the isolated pawn grows (9.Ra4 Ra4 10.Ba4 Bb4=) 9...Bb4 (9...a3 10.Ba3 Nb4 11.0–0+=) 10.0–0 0–0 11.Ra4 Qe7 (11...Be7 12.d3=) 12.Bf6 gf6 13.d4 f5 (13...Rfb8 14.Ne1+=) 14.d5 Na5 15.Bd7 Rfd8 16.Rb4 (16.de6 fe6 17.Rb4 Rd7=) 16...Qb4 17.de6 Qe7 (17...Qc4 18.Ng5 Qh4 19.ef7 Kf8 20.f4+/–) 18.Nd4 fe6 19.Be6 (19.Ne6?? Rd7 (19...Qd7?! 20.Nd8 Rd8 21.Qh5–+) 20.Nd4 Qg7–+) 19...Kh8 20.Qe1 (20.c5 Qg7 21.g3 Nc6 22.Bf5 Nd4 23.ed4 Rd4=) 20...f4 21.Qc3+= Do you see the mate threat? 21...Qg7 22.Nf5 Qc3 23.Nc3 Bc8 24.Bc8+/– Rdc8 25.c5 fe3 26.Ne3 Nb3= 27.c6 Nd4 28.h3 Nc6+= 29.Ncd5 Ra7 30.Rc1 Nd4–/+ 31.Rc4 c5 32.Ng4 Kg7–/+ 33.Nf4 Ra2 34.Nd3 Rc2 35.Ra4 Rc7 36.Nf4 Ne2 37.Ne2 Re2 38.Kf1 Ree7 39.Ne3 Ra7 40.Rg4 Kf8 41.Rf4 Rf7 42.Rc4 ½–½. Beekes,Noud – Hicdoenmez,Hakan, SL–2007–0–00062, 2007.

3.e3 Ba6 4.b5 (4.Ba6 Na6 5.Ra4 Nb8+=) 4...Bb7= 5.Nf3 a6 6.Ra4 ab5 (6...Nf6 7.Nc3=) 7.Ra8+= Ba8 8.Bb5 c6 9.Be2 Bb7 10.0–0 Ba6 11.c4 e6 12.Nc3 Nf6 13.Bb2 Be7 14.d4 c5 (14...0–0 15.Qb3+=) 15.d5 Bb7 (15...Qb6 16.Qc2+–) 16.d6 Bf8 (16...Qb6 17.de7 Qb2 18.Qd3 Bf3 19.Bf3+=) 17.Nb5 Bf3?? (better 17...Na6+–) 18.Nc7+– (18.Nc7 Qc7 19.dc7+–; 18.gf3?! Qb6 19.Qd2 Nh5+–) 1–0. DEFFM – DEADCROSS, freechess.org, 2018.

3.e3 d5 4.c4 Qd6 (4...Nf6!?+=) 5.Nc3+– Qb4 (5...Nf6 6.Qa4 c6 7.c5+–) 6.Rb1 Qc4?? (better 6...Qd6 7.cd5 Bd7+–) 7.Bc4 Bg4 (7...dc4 8.Qa4 Bd7+–) 8.Qg4 Nc6 9.Bb5 (9.Bd5 e6 10.Bc6 Kd8 11.Ba8 Bd6 12.Rb8 Ke7 13.Qg7 c6 14.Rb7 Bc7 15.Rc7 Kd6 16.Rf7 e5 17.Qf8 Ke6 18.Qe8 Ne7 19.Qe7) 9...Nh6 10.Bc6 (10.Bc6 Kd8 11.Qd7) 1–0. DEFFM – GuestZNTQ, freechess.org, 2018.

3.e3 e6 4.Ra4 Bb7 5.Nf3 Nc6 6.b5 Nce7 7.Nc3 Nf6 8.Bb2 Nfd5 (8...Ng6 9.Be2+–) 9.Qa1 Nb6 (9...Nc3 10.Bc3 f6 11.Ra7+–) 10.Ra7+– Qb8 11.Ra8 Qa8 12.Qa8 Ba8 13.Bd3 Bf3 14.gf3 Ned5 (14...d5 15.Ke2+–) 15.Nd5 Nd5 (15...ed5 16.Be5 Kd8 17.Ke2+–) 16.Ke2 f6 17.Ra1 Be7 (17...Nb6 18.Bd4+–) 18.Ra7 0–0 (18...Bd8 19.c4 Ne7 20.c5+–) 19.c4 Nb4 (19...Bc5 20.Rb7 (20.cd5 Ba7 21.de6 de6=+) 20...Nb6 21.Rc7+–) 20.Rc7 Nd3 (20...Rd8 21.Bb1+–) 21.Kd3 Rd8 22.c5 Kf8 (22...Rb8 23.b6 Bd8 24.Rd7 Bb6 25.cb6 Rb6+–) 23.b6 Rb8 (23...Bc5 24.Rc5 Rb8 25.Ba3+–) 24.b7 Kf7 (24...Rb7 25.Rb7 Bc5 26.Rd7 h6+–) 25.Rd7 Ke8 26.c6 Bc5 27.c7 Kd7 28.cb8Q (28.cb8Q Bd6 29.Qc8 Ke7 30.Ba3 Kf7 31.Bd6 h5 32.b8Q Kg6 33.Bf4 Kh7 34.Qg8 Kg6 35.Qbe8 Kf5 36.Qge6) 1–0. Pierre – Guestuzsgk, internet, 2020.

3.e4 d6 4.Nc3 Bd7 5.Nf3 e5 6.d4 ed4 7.Nd4 Nc6 (better is 7...d5!? 8.b5 Bb4+=) 8.Nc6+/– (worse is 8.Ra4 Nd4 9.Qd4 Ba4 10.Na4 Qd7+=) 8...Bc6 9.Bd3 (9.b5 Bd7+/–) 9...Qe7 (better is 9...d5 10.b5 Bb4=) 10.b5+/– Bb7 11.Na4 (11.Ra4!? Nf6 12.0–0+/–) 11...Be4 (11...d5!?=) 12.0–0+= d5? (12...Bd3 13.Qd3 Qe6 14.Bg5+/–) 13.Be4 (better is 13.Re1!?+–) 13...de4+/– 14.Qd5 Rd8 15.Qc6 Rd7? (better is 15...Qd7 16.Qe4 Qe6+–) 16.Rd1 Nf6 17.b6! cb6 (17...ab6 18.Nb6; 17...cb6 18.Nb6) 18.Nb6! Qe6 (18...ab6 19.Ra8 Decoy) 19.Qc8 Ke7 20.Ba3 Rd6 21.Rd6 Qc8 (21...Qd6 22.Bd6 Kd6 23.Nc4 Ke7 24.Ra7 Nd7 25.Qc6 f5 26.Rd7 Ke8 27.Qc8 22.Rc6 Kd8 (22...Ke8 23.Rc8 23.Rc8 1–0. jojobishop (1975) – pwillows (2115), net–chess.com, 2012.

3.Nf3 a5 4.Ra4+= Nc6 (4...Bb7 5.ba5 Nc6 6.d4 Ra5 7.Ra5 Na5 8.Bd2=) 5.b5 Nb4 6.e4 Bb7 (6...c6!?+–) 7.c3 Nd3?? (better 7...Be4 8.d3 Bf3 9.Qf3 e6 10.cb4 Bb4 11.Bd2 Bd2 12.Nd2 Ne7+–) 8.Bd3+– Be4 (8...Nf6+–) 9.Be4 Rb8 (9...d5 10.Bc2+–) 10.0–0 (10.Ra5 d5 11.Bd3 e6+–) 10...c6 (10...Nf6 11.Bd3+–) 11.bc6 Rb1 (11...d5 12.Bc2 e6+–) 12.cd7 Qd7 13.Ra5 f6 14.Bb1 1–0. DEFFM – GuestKNJR, freechess.org, 2018.

3.Nf3 d6 4.c4 Be6 5.Qa4 Bd7 6.b5 a6 7.Nc3 c6 8.d4 cb5 9.cb5 a5 (9...Ra7!?) 10.e4+– e6 11.Bc4 Be7 12.0–0 Nf6 13.e5 de5 14.de5 Nh5 15.g4 Nf4 (15...Bc8 16.gh5 Nd7 17.Rd1+–) 16.Bf4 Bb4 17.Ne4 0–0 18.Qc2 Bc8 (18...h6 19.Bh6! f5 20.Be3 Bb5 21.Be6 Kh8 22.Rfd1+–) 19.Nfg5 g6 20.Nf6 Kg7 21.Qe4 Ra7 (21...Qc7 22.Be6! Be6 23.Ne6 fe6 24.Qa8+–) 22.Ngh7 Rh8 (22...Rb7 23.Nf8 Qf8 24.Qe3+–) 23.Qe3 Rc7 (23...Rh7 24.Qa7 Bd7+–) 24.Bh6 1–0. Fritz 8 – NN, 2003.

3.f4 Bb7 4.Nf3 e6 5.c3 a5 6.b5 c6 7.e3 Nf6 8.Na3=.

3.f4 e5 4.fe5 Bb4 5.Nf3 Bb7 6.e3 Bd5 7.Be2 Nc6 8.Ra4.

3.h3 Bb7 4.Nf3 e6 5.c3 c5 6.bc5 Bc5 7.g3 Nf6 8.Bg2=.

3.h3 e6 4.Ra4 d5 5.e3 Nd7 6.Nf3 Nb6 7.Ra2 Bb4 8.Ne5=.

3.Ra4 a6

4.c4 Nf6 5.b5 (5.Nf3 d5=) 5...a5 (5...Bb7 6.Nf3=+) 6.Bb2 (6.d4 e6+=) 6...e6 7.Bc3 Attacking the isolated pawn on a5 7...d5 (7...c6 8.e3=) 8.cd5 Nd5 9.Ba5 Nb6 (better 9...Nd7+=) 10.Nc3?? (better 10.Bb6 Ra4 11.Bc7 Qc7 12.Qa4 Qc1 13.Qd1+–) 10...Nc4 (better 10...Na4 11.Qa4 Nd7–+) 11.Bc7+– (11.Rc4?! Ra5 12.Nf3 Bd6+=) 11...Qc7 12.Ra8 Bb4 (12...Bd6 13.Ne4 Bb7 14.Ra7+–) 13.Nf3 (better 13.Qb3!? Bd6 14.Rb8 Qb8 15.Qc4 Bb7+–) 13...0–0? (13...Bb7 14.Ra7 Nd2 15.Nd2 (15.Qd2?? Bc3 16.e3 0–0–+) 15...Bc3 16.e3+–) 14.e3 (better 14.Qb3 Bd6 15.Rb8 Nd2 16.Nd2 Qb8 17.Nce4+–) 14...Bb7 15.Ra1 Rd8?? (better 15...Nd2 16.Nd2 Bc3+–) 16.Bc4 (better 16.Qb3!? Qd6 17.Bc4 Bf3+–) 16...Qc4 (16...Bf3 17.Qf3 Bc3 18.dc3 Qc4 19.Rc1 Qb5 20.Qe2+–) 17.Rc1 (17.Qe2 Qg4 18.Ra4 Nd7+–) 17...Qd3 (17...Bc3 18.Rc3 Qb5 19.Qb3+–) 18.Ne5 (18.Qe2 Qg6 19.0–0 Nd7+–) 18...Qd6 19.Nc4 Qd3 (19...Qc5 20.Qb3 Bg2 21.Rg1+–) 20.Nb2 (20.Qe2 Qd7+–) 20...Qd7 (20...Qf5 21.f3 Bc3 22.Rc3 Qb5 23.Qc2+–) 21.0–0 Bc3 (21...Rc8 22.Qb3 Ba5 23.Nc4+–) 22.dc3 (22.Rc3?! Qb5 23.Qb3 Qd7+–) 22...Qc7 23.Qe2 Qb6 (23...Nd7 24.Rfd1+–) 24.Rfd1 Rc8 (24...Nd7 25.c4 Nc5 26.Nd3+–) 25.c4 Qc5 26.Nd3 Qg5 27.f3 (27.e4 Qh4 28.f4 e5+–) 27...Nd7 28.Nf2 (28.c5 Bd5+–) 28...Nf6 (28...Nc5 29.e4+–) 29.Rd4 (29.c5 Nd5 30.Qd2 Qe3 31.Qe3 Ne3+–) 29...h6 (29...e5 30.Rd6 e4 31.f4+–) 30.Rcd1 Kh7 31.Nh3 (31.Qd3!? g6 32.Ng4 Ng4 33.Rg4 Qc5+–) 31...Qf5 (31...Qc5 32.Qc2 g6 33.Qb2+–) 32.e4 (32.Qd3 Qd3 33.R1d3 e5+–) 32...Qc5 33.Kh1 Nh5 (33...e5 34.Rd6+–) 34.f4 (better 34.e5 g6 35.Nf2+–) 34...f5 (34...g6+–) 35.Qh5 Be4 36.Ng5 (36.Ng5 Kh8 37.Rd8 Qf8 38.Rf8 Rf8 39.Qg6 hg5 40.Rd7 Bg2 41.Kg2 Rf7 42.Rd8 Rf8 43.Rf8) 1–0. AleksandrNekhoroshik (1640) – bigpapanya (1625), lichess.org, 2020.

4.Nf3 Bb7 5.d4 Bc6 6.Ra1 Bb7 7.c3 Bf3 (7...Nf6 8.Nbd2+=) 8.ef3 e6 9.Bd3 g6 10.0–0 f5 11.Re1 Kf7 12.Bc4 d5 13.Bd3 c6 14.Qe2 Qd7 15.Qe5 Bg7 16.Qe3 Nf6 17.Nd2 Qd6 18.b5 (18.Nb3 Re8+–) 18...a5 (better is 18...cb5!? 19.Bb5 Nbd7+/–) 19.Ba3 Qd7 20.Nb3 cb5 21.Bb5! Qc8 (21...Qb5 22.Qe6) 22.Bd6 h5 (22...Rd8 23.Bb4 Nc6+–) 23.Nc5 Bh6 24.Qe5 Bg7 (24...Ra7+–) 25.Bd7!! Nfd7 (25...Nbd7 26.Qe6) 26.Qe6 1–0. Marre – lamiglowa, zagraj.pl, 2003.

3.Ra4 Ba6

4.Bb2 d6 5.d3 Bb5 6.Ra5 c6 7.c4 Ba6 8.Qa4 e5 9.b5 Qb6 10.Na3 Be7 11.e3 Bd8 12.Be2 Qa5 13.Qa5 Ba5 14.Kd1 Bb7 15.f4 Nd7 16.Nf3 Bd8 17.fe5 f6 18.ed6 c5 19.d4 cd4 20.ed4 Nh6 21.c5 Ng4 22.Kd2 Nf2 23.Rf1 Ne4 24.Kc2 g5 25.c6 Bc6 26.bc6 Nb6 27.c7 Bc7 28.dc7 Rc8+– 29.Kd3 Na4 30.Ke4 Nb2 31.Rb1 Na4 32.Rb8 Kd7 33.Bb5 Kc7 34.Rc8 Kc8 35.Ba4+– g4 36.Nh4 h5 37.Kd3 Kc7 38.Nb5 Kb6 39.Nd6 a5 40.Nhf5 h4 41.Ke4 h3 42.g3 Kc7 43.Kf4 Rg8 44.Bb3 Rg5 45.Nf7?! (45.Ne8!?) 45...Rg6 46.Bc2 Rg8 47.N7h6 Rd8 48.Ng4 Kb6 49.Ba4 Rc8 50.Nge3 Rc1 51.d5 Ra1 52.Nc4 Kc5 53.d6?! Ra4 54.d7?? Rc4 55.Ke3 Rc3 56.Kd2 Rf3 57.Ne3? Rf2 58.Ke1 Rh2 59.d8Q Rh1 60.Nf1 h2 61.Qa5 Kd6 62.Qa8?? Rg1!! 63.Kf2 h1Q 64.Qh1 Rh1 65.Ne3 Ke5 66.Ng4 Kf5 67.Ne3 Ke4 68.Ng4 f5 69.Nf6 Ke5 70.Nd7 Ke6 71.Nc5 Kf7 72.Nd3 Rh2 73.Kf3 Kf6 74.Nf4 Ke5 75.Nd3 Kf6 76.Nf4 Rh1 77.Kg2 Ra1 78.Nh5 Kg5 79.Nf4 Kg4 80.Kf2 Ra2 81.Ne2 Ra3 82.Kg2 Ra8 83.Nf4?? Ra2 0–1. Trkn – sanford, itsyourturn.com, 2000.

4.Nc3 Bc4 5.b5 a6? (better is 5...Be6) 6.Rc4+– (6...ab5 7.Nb5+–) 1–0. miehnekort – ansonlai1024, Yahoo, 2005.

4.Nc3 Nf6!?

4.Nf3 Nh6 5.d3+– c6 6.Nc3 Qc8 7.e4 Qb7 8.Be2 (8.e5 e6 9.Bh6 gh6+–) 8...Bb5 (8...e6!? 9.Bh6 gh6+–) 9.Nb5 Qb5 (9...cb5 10.Ra3+–) 10.c4 Qh5 11.0–0 e6 12.d4 Be7 13.Ne5 Qh4 14.g3 Qe4 15.f3 Qf5 16.g4 Qf6 17.g5 Qf5 18.gh6 gh6 19.Ng4 (19.Bh6 Rg8 20.Ng4 Qg6+=) 19...Rg8 20.Kh1 (20.Bh6 Qg6 21.Bf4 h5+=) 20...Qh5 21.Rg1 Rg6 22.Bf4 f5 (22...d6 23.c5 dc5 24.bc5+–) 23.Ne5 (23.Bb8!? Rb8 24.Ne5 Rg1 25.Qg1 Rb7 26.Qg8 Bf8+–) 23...Rg1 24.Qg1 Bg5 25.Bg3 f4 26.Bf2 d6 27.Ng4 (27.Nd3 Qf7+–) 27...Qg6 28.h4 Bd8 29.Qf1 h5 30.Bd3 Qf7 31.Nh2 a6 (31...Bf6 32.Qe2+–) 32.Qb1 Ra7 33.Qe1 d5 34.Qe5 (34.Nf1 Bf6+–) 34...Nd7 35.Qd6 Nb6 36.Ra1 (36.Qc6?! Qd7 37.Qd7 Kd7+–) 36...dc4 37.Be4 (37.Qc6?! Qd7 38.Be4 Qc6 39.Bc6 Ke7+–) 37...Nd5 38.Qc6 Qd7 39.Qc4 Qd6 40.Rg1 (40.Ra4 Nb6 41.Qc6 Qc6 42.Bc6 Kf7+–) 40...Kf8 41.b5 ab5 42.Qb5 Qb6 (42...Bf6 43.Bd5 ed5 44.Be1+–) 43.Qc5 (43.Qb6 Bb6 44.Bd5 ed5+–) 43...Qc5 44.dc5 Ra2 45.Be1 Be7 46.c6 Bd6 47.Bh7 Bc5 48.Rf1 Kf7 49.Be4 Bb6 50.Bb1 Re2 51.Bd3 (better 51.Bh7!?+–) 51...Rb2+– 52.Be4 Ra2 53.Bb1 (53.Bd5 ed5 54.Bb4 Rc2+–) 53...Re2+– 54.Bd3 Rb2 55.Bh7 (55.Ba6 Ne3+–) 55...Ra2+– 56.Be4 Re2 57.Bb1 (57.Bd5 ed5 58.Bf2 Bf2+–) 57...Rb2+– 58.Bd3 Ra2 59.Be4 Re2 ½–½. DEFFM – GuestNGLD, freechess.org, 2017.

3.Ra4 Na6

4.e3 Nb4?? 5.Rb4 Rb8 6.Rb8 Bb7 7.Rd8 Kd8 8.Qg4 Nh6 9.Qh3 c6 10.d4 c5 11.Bb5 Ke8 12.Qd7 1–0. Trkn – lancegirl, itsyourturn.com, 2000.

4.e3 e6 5.Ba6 Ba6 6.Ra6 Bb4 7.c3 Be7 8.d4 Nf6 9.Ba3 Ba3 10.Na3 0–0 11.c4 Ne4 12.Nf3 Ng5 13.0–0 Ne4 14.Nb5 d5 15.cd5 c5 16.dc6 Qd5 17.Qe2 Rfc8 18.Na7 Rc7 19.Nb5 Ra6 20.Nc7 Qc6 21.Qa6 Qa6 22.Na6 h6 23.Rb1 g5 24.Nc5 Nd6 25.Rb6 Nf5 26.g4 Ne7 27.Rb7 Nd5 28.h4 Nf6 29.Ne5 gh4 30.Rf7 Ne8 31.Ne6 h3 32.Rf8 Kh7 33.Re8 h5 34.gh5 h2 35.Kh2 Kh6 36.Rh8 1–0. marekt – bajubiru, gameknot.com, 2001.

4.e3 Nf6?? 5.Ba6+– Ba6 6.Ra6 Nd5 7.Nf3 Ne3 8.fe3 Qb8 9.Nc3 Qb4 10.0–0 (10.0–0 f6+– 6.34/9 (10...Qb7 11.Ra1+–)) 1–0. polly – lato, internet, 2011.

3.Ra4 Bb7

4.Bb2 Bc6 5.Ra2=.

4.Bb2 d5 5.e3 e6 6.Nf3 Nf6 7.c4 (7.Bd4 Bd6=) 7...dc4= 8.Bc4 Be7 (8...Nfd7 9.Be2=) 9.0–0 (9.Bf6 Bf6 10.d4 Be7=) 9...0–0 (9...Nbd7=) 10.d4 (10.Bf6 Bf6 11.d4 a6) 10...Nc6 (better is 10...Nbd7!? 11.Qb3 Nb6–/+) 11.b5 Nb8 12.Nbd2 Nbd7 13.Be2 c6 14.Qa1 Qb8 15.Rb1 Nb6 16.Ra2 (16.Ba3 cb5 17.Bb5 Na4 18.Be7 Nb6 19.Bf8 Qf8) 16...cb5= 17.Bb5 Bd5 18.Ra6 Bb4 (18...Bb7 19.Ba3 Ba6 20.Be7 Bb5 21.Bf8=) 19.Ba3 Ba3 20.Ra3 Qb7 21.Ba6 Qe7 22.Rc1 (22.Bd3 Bf3 23.Nf3 Nfd5) 22...h6 23.Rac3 Ne4 (23...Rfb8 24.Bd3) 24.Ne4+/– Be4 25.Rc7 Qf6 (25...Qd6 26.Bb7 Bb7 27.Rb7) 26.Ne5 (26.Bb7 Bb7 27.Rb7 Nd5) 26...Qg5 (26...Nd5 27.R7c5 Qg5 28.Bf1) 27.g3 (27.Bf1 a5) 27...Nd5 28.h4?? (28.R7c5 Qh5) 28...Qh5 (28...Qf5 29.g4 Qf6–/+) 29.Bd3?? (better is 29.Bb7 Nc7 30.Be4) 29...Bd3–+ 30.Nd3 Nc7 31.Rc7 Qb5 (31...Rfc8 32.Rc8 Rc8 33.Ne5–+) 32.Nc5 Rfb8 33.Kg2 Qb6 34.Na6 0–1. Bittner – Rohloff, 1987.

4.Bb2 e6 5.e3 d5 6.Nf3 a6 7.Ne5 Nf6 8.d4 Be7 9.Be2 0–0 10.c3 c6 11.0–0 a5 12.ba5 Ra5 13.Nd2 Nbd7 14.Ra5 Qa5 15.Nd7 Nd7. NN – NN, 2000.

4.Bb2 e6 5.e3 Nf6 6.Nf3 Be7 7.c4 0–0 8.b5 d6 9.d4 Nbd7 10.Bd3 Nb6 11.Ra1 a6 12.ba6 Ba6 13.0–0 (better is 13.Qb3!? d5 14.Ra6 Ra6 15.cd5 Qd5 16.Qd5 Nbd5 17.Ba6=) 13...Bc4–/+ 14.Bc4 Nc4 15.Bc3 Ne4 16.Nbd2?? (better is 16.Ra8 Qa8 17.Qd3–/+) 16...Nc3–+ 17.Qb3 Ra1 18.Ra1 Nd2 19.Nd2 Nd5 20.e4 Nb6 21.Nc4 Nc4 22.Qc4 Qb8 23.g3 Rc8 24.d5 ed5 25.ed5 Bf6 26.Rc1 Qb6 27.Rc2 Bd4 28.Kg2 Bc5 29.Re2 Ra8 30.Qa4 Qb8 (30...Ra4?? 31.Re8 31.Qc6 Bb6 32.Re7 Qf8 33.Rd7 Qe8 (33...Qe8 34.Re7 Qc6 35.dc6 Kf8–+) 0–1. Rush,Bradley – Ausan,Leo Tito Jr, ZL–2011–0–01049, 2011.

4.b5 a5 5.Nf3 Nf6 6.Nc3 (6.Bb2 e6=) 6...c6 (6...Bf3 7.ef3 e6 8.Bb2=) 7.e4+= Qb6 8.e5 e6?? (better 8...cb5 9.Bb5 Ne4 10.Ne4 Qb5=) 9.ef6+– Bc5 (9...gf6 10.Ba3+–) 10.fg7 Bf2 11.Ke2 Rg8 12.Ne4 Qb5 (12...f5 13.Nd6 Kd8 14.Nb7 Qb7 15.Kf2 cb5+–) 13.c4 Qb1 14.Nf6 Kd8 15.Ng8 Qe4 (15...Qg6 16.Qb3 Ba6+–) 16.Kf2 d5 17.Nh6 Nd7 18.g8Q Ke7 19.Qf7 Kd8 20.cd5 Qa4 21.d6 Qd1 (21...Qd4 22.Nd4 Ba6 23.Qc2 Bf1 24.Qc6 Bg2 25.Qfd7) 22.Qe7 (22.Qe7 Kc8 23.Qe8) 1–0. Marcus – 2578, internet, 2018.

4.b5 a6 5.ba6 Ra6 6.Ra6 Na6 7.Nf3=.

4.b5 a6 5.e3 ab5 6.Ra8 Ba8 7.Bb5?? Bg2–+ 8.Bb2 Bh1 9.Qg4 e6 (9...Nh6 10.Qd1–+) 10.Bg7 Bg7 (10...Nf6 11.Bf6 Qf6 12.d4–+) 11.Qg7 Qf6 12.Qg3 (12.Qf6 Nf6 13.Ne2–+) 12...c6 (better 12...Qa1 13.Ke2 Qb1–+) 13.Qb8 Ke7 (13...Qd8 14.Qd8 Kd8 15.Be2–+) 14.Bd3 Nh6 15.Qb4 d6 (15...Ke8 16.Ne2–+) 16.Qb7–/+ Kf8 17.Qb8 Kg7 18.Qd6 Ng4?? (better 18...Rg8–/+) 19.Qg3+– h5 20.h3 (20.f3 Qe5 21.fg4 Qg3 22.hg3 hg4+–) 20...Qf2 (20...Qa1 21.c3 Rd8+–) 21.Qf2+– Nf2 22.Kf2 Rd8 (22...Rg8 23.Nf3+–) 23.e4 (23.Ne2 h4+–) 23...Rb8 (23...Kf6!?+–) 24.Nc3+– Rd8 25.Kg3 f5 26.Kh2 (26.ef5 ef5 27.Kh2 Bd5 28.Bf5 Re8+–) 26...fe4? (better 26...Be4!? 27.Be4 Rd2 28.Bg2 e5+–) 27.Be4 (27.Kh1?! ed3 28.cd3 Rd3=) 27...Be4 28.Ne4 Rd4 29.d3 Ra4 30.Ne2 (30.Kg3 Ra2+–) 30...Ra2 (30...e5 31.Ng1 Ra2 32.Nf3 Rc2 33.Kg3+–) 31.Nd4 Ra4? (better 31...e5 32.Nf3 Rc2 33.Kg3 Re2+–) 32.Ne6 Kh6 33.N6c5 (better 33.Kg3!? Ra2 34.c4 Ra3+–) 33...Ra2 34.Kg3 Rc2 35.Ne6 Ra2 36.Nd8 Ra3 (36...Re2 37.Nc5 Re8+–) 37.Nc6 (better 37.Nf7 Kg6 38.Ne5 Kf5 39.Nd6 Kg5 40.h4 Kf6 41.Kf4+–) 37...Rd3+– 38.Kg2 Re3 39.Nf2 (better 39.Ng3 Kg5 40.Nf1+–) 39...h4?? (39...Kg5 40.Nb4+–) 40.Nd4 (better 40.Ng4 Kg5 41.Ne3+–) 40...Kg5+= 41.Nf3 Kh5 (41...Kf4!? 42.Ne1 Rg3 43.Kh2 Rc3+=) 42.Ng4 Re2 (42...Ra3 43.Kf2+–) 43.Kf1+– Ra2 44.Ke1 Ra3 45.Ke2 Ra2 46.Ke3 Ra4 47.Nf6 Kg6 48.Ng4 Kh5 49.Nd4 (better 49.Nf2+–) 49...Ra3= 50.Kf4 Rh3 51.Nf6 Kg6 52.Ke5 (52.Nd7 Rg3=) 52...Rd3 (52...Re3 53.Kf4 Rd3 54.Nf3–/+) 53.Nf5 (53.Ne6 Re3 54.Ne4 h3 55.Nf4 Kh6 56.Nh3 Rh3=+) 53...h3–/+ 54.Nh4? (54.Ng4 Rd5 55.Kd5 Kf5 56.Ne3 Kf4 57.Nf1=) 54...Kg5–+ 55.Nf5 h2 56.Ne4 Kg4 57.Nf2 Kf3 58.Nd3 h1Q 59.Nd4 (59.Nc5–+) 59…Ke3 (59...Ke3 60.Nf5 Kd3–+) 0–1. AleksandrNekhoroshik (1635) – ejsikasia (1655), lichess.org, 2020.

4.b5 c6 5.c4 cb5 6.cb5 d5 7.Nf3 Nd7 8.Ba3 e5 9.Qc1 Ba3 (9...Be7 10.e3=+) 10.Qa3= (worse 10.Na3 Ngf6–/+) 10...Ne7 11.e3 0–0 12.Be2 Nc8 (12...Nf5 13.0–0=) 13.0–0+= f5 Black plans e4 (13...f6 14.Qa2+=) 14.Rc1+– e4 15.Nd4 Ndb6 16.Ra5 f4?? (better 16...Qf6+–) 17.Ne6+– Qf6 18.Qf8 (18.Nf8?! f3 19.gf3 Nd6+–) 18...Qf8 19.Nf8 Kf8 20.Rc7 Rb8 21.ef4 d4 22.Bg4 Nd6 23.Ra7 Bc8 24.Be2 Ne8 (24...Be6 25.Na3+– (25.Rg7?! Nbc8 26.Rac7 Ne8 27.Rh7 Nc7 28.Rc7 Nd6+–)) 25.Rf7 Kg8 26.Rfe7 d3 (26...Kf8 27.Na3 Bd7 28.Re4 d3 29.Bd3 Bf5+–) 27.Re8 1–0. Pierre – Sirin, internet, 2019.

4.b5 c6 5.e4 e5 (5...Nf6 6.Nc3=) 6.c4 (6.Nf3 cb5 7.Bb5 Nf6) 6...cb5= 7.cb5 Nf6 8.Nc3 (8.Bb2 d6=) 8...Bc5 9.Nf3 Ng4 (9...Qb6 10.Qe2=) 10.d4 ed4 11.Nd4 h5 (11...Qh4 12.g3 Qf6 13.f3) 12.Be2 (12.Nd5 Bd5 13.ed5 0–0) 12...Qe7 (12...Qh4 13.g3 Qf6 14.f3) 13.0–0 (better is 13.h3 Nh6 14.0–0) 13...Be4? (better is 13...Qd6 14.f4 a6) 14.Ne4+– Qe4 15.Bf3 Ne3 (15...Qe7 16.Ba8 0–0+–) 16.Be3 (16...Qg6 17.Ba8+–) 1–0. lesbian14 – cknarang, Live Game Caissa's Web, 2006.

4.b5 e5 5.Bb2 d6 6.c4 Nf6 7.e3 Be7 8.Nf3 0–0 9.Be2 a6 10.0–0 ab5 11.Ra8 Ba8 12.cb5 Nfd7 (12...c5!?=) 13.d4+= e4 14.Nfd2 d5 15.Nb3 (15.Qc2 c6+=) 15...Nb6 (15...c6 16.Ba3=) 16.Nc5 Bc5? (better 16...Bd6+=) 17.dc5+– Nc4 18.Bc4 dc4 19.Qd8 (19.Qg4 g6+–) 19...Rd8 20.c6 (20.Be5 Rc8+–) 20...h6 (20...Rd3 21.Nc3 f5 22.Ra1 Bc6 23.bc6 Nc6 24.Ra4+–) 21.Nc3 (21.Na3 Nc6 22.bc6 Bc6+–) 21...Re8 (21...f5 22.Rd1 Rd1 23.Nd1+–) 22.Nd5 Rc8?? (better 22...Bc6 23.bc6 Nc6+–) 23.Ne7 (23.Ne7 Kh7 24.Nc8 Nc6 25.bc6 Bc6 26.Rd1+–) 1–0. AleksandrNekhoroshik – RodolfoInmortal, lichess.org, 2021.

4.b5 e6 5.e3 Nf6 6.Bb2 Be7 7.Nc3 0–0 (7...c6 8.Ba3=) 8.Qa1 Nd5?? (better 8...d5+=) 9.Nd5+– Bd5 10.Bg7 Re8 (10...f5 11.Bf8 Bf8 12.Ra7 Bg7+–) 11.Rg4 f6 12.Bf6 Kf7 13.Rg7 Kf8 14.Be7 Re7 (14...Qe7 15.Re7 Ke7+–) 15.Qf6 (15.Qf6 Ke8 16.Rg8) 1–0. Lavendel – Niclic, internet free game, 2018.

4.b5 e6 5.e3 Nf6 6.Bb2 Be7 7.f4 0–0 8.Nf3 d6 9.Nc3 Nbd7 10.Be2 Nb6 11.Ra1 Nfd5 12.Nd5 Bd5 13.0–0 Nc4 (13...Qd7 14.Qe1+=) 14.Bc3+– Bf6? (better 14...f5+–) 15.e4+– Bc3 16.dc3 Be4 (16...Ne3 17.Qd3 Nf1 18.ed5+–) 17.Bc4 Qf6 (17...c6 18.Ng5 Qb6 19.Kh1 cb5 20.Ne4 bc4 21.Qd6+– (worse 21.Nd6 Rfd8=+)) 18.Qd2 d5 (18...Qf5 19.Rf2+–) 19.Bd3 Rfd8 (19...Bf3 20.Rf3 Rfb8 21.Qf2+–) 20.Ne5 Bg6 21.Qf2 Bf5 (21...Bd3 22.cd3 (22.Nd3?! Qc3 23.f5 ef5+–) 22...Re8 23.Ra6+–) 22.Ra7 Be4 (22...Rdc8+–) 23.Rc7 Ra2 (23...Rac8 24.Rf7 Qf7 25.Nf7 Kf7 26.f5 ef5 27.Be4 de4 28.Qf5 Kg8 29.Qe4+–) 24.Rf7 Qh6 25.Qc5 Bd3 26.cd3 Qh5 27.Qe7 Rg2 (27...Qf7 28.Qf7 Kh8 29.f5 ef5 30.Qf5 h6 31.Nf7 Kg8 32.Nh6 gh6 33.Qg6 Kh8 34.Rf7 Ra1 35.Kf2 Ra2 36.Kf3 Rf2 37.Kf2 Re8 38.Qg7) 28.Kg2 Qe2 (28...Ra8 29.Rg7 Kh8 30.Qf6 Ra2 31.Rf2 Rf2 32.Kf2 Qh4 33.Qh4 Kg7 34.Qe7 Kg8 35.Qf7 Kh8 36.Qf8) 29.Rf2 Qe4 (29...Qf2 30.Kf2 Ra8 31.Rg7 Kh8 32.Rh7 Kg8 33.Qg7) 30.de4 de4 (30...Ra8 31.Rg7 Kh8 32.Rh7 Kg8 33.Qf7) 31.Qd8 1–0. Pierre – Ares, internet, 2019.

4.b5 Nf6 5.e3 d5 6.Nc3 e5 7.Nf3 Nbd7 8.Bb2 Bd6 9.Be2 0–0 10.0–0 c5 11.bc6 Bc6 12.Ra6 Qc7 13.Nb5 (13.Ba3!? Ba3 14.Ra3=) 13...Bb5–/+ 14.Bb5 Nb6 (14...e4!? 15.Nd4 Bh2 16.Kh1 Be5–/+) 15.d4 e4 16.Ne5 Be5 17.de5 Nfd7 18.Qd4 f6 (18...Nc5 19.Ra2=) 19.ef6+= Nf6 (worse 19...Rf6 20.c4+–) 20.Rfa1 Qc2? (20...Kh8!?+=) 21.Rc1+– (21.Ra7?! Ra7 22.Ra7 Nc4 23.Bc4 dc4=) 21...Qb3 22.Bc6 Rac8?? (better 22...Rad8 23.Ra3 Qc4 24.Ra7 Qd4 25.Bd4 Nc8+–) 23.Ra3+– Qa3 24.Ba3 Rfd8 25.Qe5 Nc4 (25...Kh8 26.Qe6+–) 26.Qe6 Kh8 27.Be7 Rg8 (27...Re8 28.Be8 Re8+–) 28.Bf6 gf6 (28...Na5 29.Bd4 Nc6 30.Rc6 Rc6 31.Qc6+–) 29.Qf6 (29.Qf6 Rg7 30.Bd5+–) 1–0. pereira – anonymous, internet, 2014.

4.Nc3 Nf6=.

4.c4 c5 5.b5 (5.bc5 e5) 5...d6 6.e3 a6 7.ba6 Na6 8.Nc3 (8.d4 Nf6=) 8...Nb4 (8...Nf6 9.Nf3=+) 9.Nf3 Nf6 10.Be2 e6 11.0–0 Be7 12.d4 (12.Ra8 Qa8 13.Qb3 0–0=) 12...0–0 13.Nd2 (13.Bb2 Qb6=) 13...Ra4 14.Na4 (14.Qa4 Bc6 15.Qa7 Qb8 16.Qb8 Rb8 17.dc5 dc5=) 14...cd4 (14...Qa5 15.Nc3=+) 15.ed4 Qc7 (15...Qd7 16.Qb3 Nc6 17.Bb2=) 16.Qb3 Rb8 (16...Nc6 17.Qe3=) 17.Qb4 Bf3? (better is 17...Bg2 18.Qc3 Bf1 19.Bf1 Ra8=) 18.Qb8!+– Qb8 19.Nf3 (19.Bf3?! Qa7 20.Nc3 Qd4+/–; 19.gf3?! Qa7 20.Nb2 Qd4=) 19...Qb4 20.Nb2 Nd7 (20...Ne4 21.Bd3 f5 22.Re1) 21.Rd1 g5 22.d5 (22.Kf1 Qb6+–) 22...e5 (22...Nc5 23.Kf1+–) 23.Nd2 f5 24.Nd3 (24.g4 fg4 25.Nd3 Qc3 26.Bg4 Qd3 27.Bd7 Qe2+–) 24...Qa4 (24...Qb6 25.Kf1+–) 25.f3 h5 26.Nf2 (26.Re1 Bf6+–) 26...Nc5 27.Kf1 g4 28.Nb1 gf3 29.gf3 Nb3 30.Nc3 Qa1 31.Nb5 (31.Bg5 Qc3 32.Be7 Nc1+–) 31...Nc1 32.Nd3 Bg5 33.Nd6 (better is 33.Nc1!? Bc1 34.Nd6) 33...Qa6= 34.Nf5 (better is 34.Nc1!? Qd6 35.Nb3=) 34...Ne2–/+ 35.Ke2 Qc4 (36.h4 Bh4 37.Nh4 e4 38.fe4 Qe4 39.Kf1 Qh4–/+; 35...Qa2 36.Ke1 Qc4 37.h4–/+) 0–1. Nicklich,Wolfgang – Bergelt,Manfred, corr DDR–ch M636, 1979.

4.c4 e5 5.Bb2 d6 6.Nc3 Nf6 7.Nf3 Be7 8.e3 0–0 9.Be2 Nc6 (9...Nbd7 10.Qa1=) 10.b5+= White gets strong initiative 10...Nb8 11.Qa1 a6 12.0–0 c6 13.d4 cb5 (13...e4!? 14.Nd2 d5+–) 14.cb5+– Qb6 15.de5 de5 16.Ne5 a5? (better 16...Qe6 17.Nf3 Nfd7+–) 17.Nc4+– Qc7 18.Na5 Bd6 (18...Rd8 19.Rc1 Qb6 20.Nb7 Ra4 21.Qa4 Qb7 22.Bf3+–) 19.Nb7 Ra4 20.Na4 (20.Qa4?! Qb7 21.Bf3 Qc7+–) 20...Qb7 21.Bf6 gf6 22.Qf6 Qd7 (22...Qc7 23.Qh4+–) 23.Nb6 Qc7 (23...Qd8 24.Qd4 Be5 25.Qe5 Qb6+–) 24.Nd5 Qd8 (24...Qd7 25.Qg5 Kh8 26.Nf6+–) 25.Rd1 Bb4 (25...Bh2 26.Kh2 Qf6 27.Nf6 Kg7 28.Rd6+–) 26.Qd8 Rd8 27.Nf6 Kg7 28.Rd8 (28.Rd8 Kf6 29.Rb8+–; better 28.Nh5 Kh6 29.Rd8 Kg5+–) 1–0. PeterRs (2515) – retiponziani (1920), ChessWorld.net, 2012.

4.c4 e6 5.Nf3 Nc6 6.b5 Nb8 (6...Nce7 7.Nc3+=) 7.e3 Nf6 8.Be2 a6 9.0–0 ab5 10.cb5 c6 11.Ra8 Ba8 12.Qa4 Bb7 13.Qa7 Qc7 (13...Qc8 14.b6+/–) 14.Nd4 Bd6 (14...cb5 15.Nb5 Qc8 16.Ba3+/–) 15.f4 (15.b6!? Qc8 16.Ba3 c5+–) 15...0–0 (15...c5 16.Nb3 Ke7+/–) 16.Bf3+– Na6?? (better is 16...Nd5 17.Ba3 Ba3 18.Na3 cb5 19.Bd5 ed5 20.Nab5 Nc6+/–) 17.ba6 Ra8 (17...Bc8 18.Qc7 Bc7+–) 18.Qb7 Qb7 19.ab7 Rb8 20.Nc6! Rb7 (20...dc6 21.Bc6 Combination) 21.Ne7! Be7 22.Bb7 1–0. BlackDemon (2615) – Siciliec, FICS rated standard game, 2013.

4.c4 Nf6 5.Nc3 e6 6.Qb3 (6.d4 Nc6 7.b5 Nb4) 6...Nc6 (6...Be7 7.d4=) 7.e3 Be7 8.d4 0–0 9.b5 Nb8 10.Nf3 c6 (10...a6 11.Be2=) 11.Ba3 Ba3 12.Qa3 cb5 13.Nb5 (13.Ra7?? b4 14.Ra8 ba3 15.Ra3 Bf3 16.gf3 Qe7–+) 13...Bf3 14.gf3 Nc6 (14...a5 15.Bd3) 15.Na7 Qb6 16.Nc6 (better is 16.Nb5!? Qb7 17.Be2) 16...Qc6=+ 17.Ra8 Ra8 18.Qb2 Qf3 19.Rg1 Ne4 20.Rg2 d5 21.c5 h5 22.c6 h4 23.h3 Kh7 24.c7 Rc8 25.Qb8 (25.Qb7 Nd6 26.Qa6 Rc7 27.Qd3 Ne4–/+) 25...Nc3 (25...Nf2 26.Qc8 Qe3 27.Be2 Nd3 28.Kf1 Qc1 29.Bd1 Qd1) 26.Kd2?? (26.Bd3 g6 27.Kd2 Qg2 28.Kc3 Rg8) 26...Ne4?? (better is 26...Qd1 27.Kc3 Rc7 28.Qc7 Qc1 29.Kb3 Qc7–+) 27.Kc2 (27.Kc1 Nd6=) 27...Nd6 (27...Nf2 28.Qc8 Qd1 29.Kc3 Ne4 30.Kb2 Qf1=) 28.Qb6? (28.Rh2 g6 29.Ba6 Qf5 30.Kd2+–) 28...Ne8–/+ 29.Kd2 Rc7 (29...Nc7 30.Qb7 Ra8 31.Qc7 Ra2 32.Kc3=) 30.Qb8 Re7 31.Qd8 Qf6 32.Bd3 (32.Bb5 Nc7 33.Bd3 g6 34.Ke1=+) 32...g6=+ 33.f4 (33.Bb5 Ng7=+) 33...Ng7 34.Rg1 (34.Rg5 Nf5=+) 34...Nh5–/+ 35.Rb1 Ra7 36.Qb8 (36.Qf6 Nf6 37.Rc1 Ra2 38.Rc2 Rc2 39.Kc2 Kg7–/+) 36...Qe7 37.Rb2 Ng3 38.Qe5 Qc7 (better is 38...Ra3–/+) 39.Qf6? (better is 39.Qc7 Rc7 40.Rb6–/+) 39...Qe7 (39...Qa5 40.Kd1 Qc3 41.Qh4 Kg7–+) 40.Qe5–/+ Qc7 41.Qf6 Qe7?? 42.Qe5= ½–½. Fredek (2090) – Guest281299, Freundschaftspartie, 5m + 0s, 2005.

4.d4 e6 5.c3 Be7 6.Nd2 Nf6 7.e3 0–0 8.Ngf3 c6 9.Bd3 d6 10.0–0 c5 11.bc5 dc5 12.Nb3 cd4 13.cd4 Nd5 14.Bd2 Nc6 15.Qa1 Qb6 16.Rb1 Qc7 17.Na5 Na5 18.Ra5 Bc6 19.Rc1 Rfc8? (19...Qb7 20.Ne5 Be8 21.Ba6+–) 20.Bb5 (20.Ne5 Qd6 21.Ba6 Rc7+–) 20...Qb7? (20...Qb6 21.Bc6 Rc6 22.Rc6 Qc6 23.Ra7 Ra7 24.Qa7+/–) 21.Bc6?? (better is 21.Ba6 Qb6 22.Bc8 Rc8 23.Ne5+– (worse is 23.Ra7 Bd6+–)) 21...Rc6+/– 22.Rc6 Qc6 23.Ra7 Ra7 24.Qa7 Bf8? (24...Qc2 25.Qb8 Bf8 26.h3+=) 25.h3 (25.Qf7 Kf7 26.Ne5 Ke8 27.Nc6 Bd6+–) 25...g6? (25...Qc2 26.e4 Qb1 27.Kh2 Qe4 28.Qf7 Kf7 29.Ng5 Kf6 30.Ne4 Kf5 31.f3+/–) 26.Qb8 (better is 26.Qf7! Kf7 27.Ne5 Ke8 28.Nc6 Bg7+–) 26...Qc7 27.Qa8 Nb6 28.Qa5 Bd6 29.Qc3 Qc3 30.Bc3 Nd5 31.Bd2 Nf6 32.Kf1 Ne4 33.Be1 h6 34.Ke2 f5 35.Kd3 Kf7 36.Kc4 g5 37.Nd2 Nd2 38.Bd2 e5? (better is 38...Ke8+/–) 39.Kd5+– Bb8 40.de5 h5 41.f3 g4 42.e4 fe4 43.Ke4 gh3 44.gh3 Ke6 45.f4 Ke7 46.f5 (46.f5+–) 1–0. bobby fissure – retiponziani, ChessWorld.net, 2012.

4.e3 c5 5.b5 a6 6.ba6 Ba6 (better is 6...Na6 7.Nf3 Nf6=) 7.Qh5 (7.Ba6 Na6 8.Nf3 Qb6) 7...e6 (7...Bf1 8.Ra8 Bg2–+) 8.Ba3?? (8.Nf3!?=) 8...Nf6 (better is 8...Bf1 9.Ra8 Bg2–+) 9.Qf3 (9.Qh3 Nd5 10.d3 Qb6–/+) 9...d5 (9...Bb7 10.Ra8 Bf3 11.Nf3–/+) 10.Bb5 (10.Nc3 Qb6=+) 10...Nfd7 (10...Bb5 11.Ra8 Bc6 12.Rb8 Qb8 13.Qd1–/+) 11.Nc3 (11.Bb2 Ra7 12.Na3 Qb6=) 11...Bd6 (11...Bb5 12.Ra8 Bc6 13.Ra7–+) 12.Nge2 (12.d4 0–0 13.dc5 Nc5 14.Bc5 Bc5=+) 12...0–0 (12...Bb5 13.Ra8 Bc6 14.Rb8 Qb8 15.d4–/+) 13.Ng3 (13.Bc1!?=+) 13...Nb6 14.Ba6?? (better is 14.Ra5–/+) 14...Na4–+ (14...Na6?! 15.Ra5–+; 14...Ra6?! 15.Ra6 Na6 16.0–0–/+) 15.Na4 (15.Bb7 Ra7 16.Na4 Ra4–+ (< 16...Rb7 17.Nc3–+)) 15...Ra6 (< 15...Na6 16.Nc3 Nb4 17.Bb4 cb4 18.Nb1–+) 16.Bc5 Ra4 17.Bd6 Qd6 18.0–0 Nc6 19.d3 Rfa8 (20.Rc1 Qa3–+) 0–1. Guest76042 – Guest74732, Friendly Game, 5m + 0s, 2003.

4.e3 c6 5.Nf3 e6 6.Bb2 Nf6 7.Nc3 Na6?? (better is 7...Qb6=) 8.Ba6+– (8.Ra6?! Ba6 9.Ba6 Bb4) 8...Rb8 9.Be2 Qb6 10.Na2 Nd5 (10...d6 11.Bd4 c5 12.Bf6 gf6 13.Qa1+–) 11.c4 Nb4 12.Be5 Ra8 13.Bd4 (13.Nb4 Bb4 14.Bg7 Rg8+–) 13...c5 (13...Qc7 14.Nb4 (14.Rb4?! Bb4 15.c5 a5+–) 14...c5 15.Na6 Ba6 16.Be5+–) 14.Rb4! Qb4 (14...cb4 15.Bb6) 15.Nb4 cb4 (15...cd4 16.Nd3+–) 16.Qa4 Be7 (16...f6 17.Qa5+–) 17.Ne5 Bc6 (17...Rd8 18.Qa7 Bg2+–) 18.Nc6 (18...Bf6 19.Bf6 gf6 20.Na7+–) 1–0. Trkn – guest5225, ICC, 2005.

4.e3 e5 5.Bb2 Be7 (5...f6!?+=) 6.Be5+– a6?? (better 6...Nf6+–) 7.Bg7+– Bg2 (7...Bf6 8.Bh8 Bh8+–) 8.Bg2 (8.Bh8?! Bh1 9.Qh5 Be4+–) 8...a5 (8...d5 9.Bh8 c6 10.Qh5+–) 9.Bh8 (better 9.Ba8 Bf6 10.Bh8 Bh8 11.Ra5 Nf6+–) 9...Nh6 10.Ba8 Nc6 11.Bc6 dc6 12.ba5 Ng4 13.Qg4 f6 14.a6 c5 15.a7 c4 (15...Kf7 16.a8Q Bf8 17.Qc4 Ke8 18.Qc6 Qd7 19.Ra8 Ke7 20.Bf6) 16.a8Q Bd6 (16...c3 17.Qc6 Qd7 18.Qgd7 Kf8 19.Qe8) 17.Qd8 (17.Qe6 Be7 18.Qd8 Kd8 19.Ra8) 17...Kf7 (17...Kd8 18.Bf6 Ke8 19.Qe6 Kf8 20.Ra8) 18.Qg7 (18.Qgg8) 18...Ke6 19.Ra5 Be7 (19...c5 20.Qgf6 Kd5 21.Qa8) 20.Qd5 (20.Qge7) 1–0. sirgeshdb – jantonia, lichess.org, 2020.

4.Nf3 (--> 3.Nf3 Bb7 4.Ra4).

4.Nf3 Nf6 5.Bb2 e6 (--> 2.Bb2 Nf6 3.a4 ba4 4.Nf3 e6 5.Ra4 Bb7).

4.e3+= e6

5.Bb2 d5 6.Qf3 (6.Nf3 Nf6+=) 6...Qd7 7.Ra1 (7.Nc3 Bd6+=) 7...c5 (7...a6!?=) 8.bc5+/– Bc5?? (better is 8...Nc6+/–) 9.Bg7+– d4 10.Qh5 (10.Bh8?! Bf3 11.Nf3 de3 12.de3 Nc6=) 10...Qd6 (10...Qd5 11.Qd5 Bd5 12.Bh8+–) 11.Bh8 de3 12.fe3 Nc6 (12...Be4 13.Bb5 Nd7 14.Qg4+–) 13.Qh7 0–0–0 (13...Nge7 14.d4 Bb6 15.Bf6+–) 14.Nf3 (better is 14.d4!? Bb6 15.Qf7 Nh6+–) 14...f6 15.Ba6 Ba6 16.Ra6 e5 17.Nc3 Bb6 18.Ra4 Nb4 19.Nb5 Qc5 20.Na7 Kb8 21.Rb4! Ka8 22.0–0 Rd2 23.Nc6! Qc6 24.Nd2 Be3 25.Kh1 Bd2 26.Ra1 Qa6 27.Ra6 1–0. Kern,Ma – Cane, corr 3GMM–57, 1995.

5.Bb2 Nf6 6.Nc3=.

5.Bb2 Nf6 6.Nf3 d5 7.Be2 a6 8.c3 (8.0–0 Nbd7=) 8...Bd6 9.d4 0–0 10.Bd3 Nbd7 11.Nbd2 c6 12.Qb3 Qc7 13.c4 dc4 (13...Rfb8 14.0–0=) 14.Nc4+= (14.Qc4? Nb6 15.Qa2 Na4 16.Qa4 a5 17.ba5 Ra5–+; 14.Bc4?! Nb6 15.Ra5 Nfd5=) 14...Rfb8 15.Nd6 Qd6 16.Nd2 (16.Ne5 Nd5+/–) 16...Nb6 (16...a5 17.e4 (< 17.Ra5 Ra5 18.ba5 c5=+; 17.ba5 c5 18.dc5 Nc5–+) 17...Qf4 A) 18.ba5? Ba6 19.g3 Qd2 20.Kd2 Rb3 21.Ba6 Ra6–+; B) 18.Ra5 Ng4 19.Rf1 Ra5 20.ba5 Ba6–+ (20...Qh2?! 21.Qd1 Ngf6 22.e5=; 20...Nh2?! 21.Qc3–/+); C) 18.g3=) 17.Ra5 Qc7 (17...Nbd5 18.Ba3+=) 18.g3 (better is 18.e4!?+/–) 18...Nbd5+= 19.Ba3 Bc8 20.e4 Qa5 21.ba5 Rb3 22.Nb3 Nc3 23.Nc5 Nb5 24.Bb2 Nd7 25.Nd7 Bd7 26.Ke2 Rc8 27.Rc1 Kf8 28.Ke3 f6 29.f4 h6 30.Rc5 Kf7 31.Bc4 Ke7 32.h3 Rb8 33.Bc1 Nc7 (33...f5 34.Re5 Kf6 35.g4+/–) 34.Ba3 Nb5?? (better is 34...Kf7+/–) 35.Rb5+– (35...Kd8 36.Rb8 Kc7 37.Ra8+–) 1–0. marekt – Boyat, ChessWorld.net, 2003.

5.d4 d5 6.Nf3 Nd7 7.Bd2 Nb6 (7...Ngf6 8.Ra5+=) 8.Ra5 Nf6 9.Na3 Ne4 10.Bb5 c6 11.Bd3 Nd6 (11...Bd6!?+=) 12.0–0+/– Be7 13.c3 Qd7 (13...0–0 14.Qc2 f5 15.c4+/–) 14.Ne5 Qc8 (14...Qc7 15.Qf3+/–) 15.c4 (15.Qh5 Nd7+/–) 15...dc4 (15...Ba6 16.Qe2+/–) 16.Nac4 Nbc4 17.Nc4 0–0 (17...Nc4 18.Bc4 Qb8 19.Qh5+/–) 18.Ne5 Bd8 (18...f6 19.Qh5 Nf5 20.Nc4+/–) 19.Rc5+– Bb6 20.Rc3 Qe8 21.Qc2 f5 22.Nc6 Bc6 (22...Rc8 23.Rc1+–) 23.Rc6 Rc8 24.b5 (24.Rd6 Rc2 25.Bc2 Bc7=+) 24...Rf7 (24...Rc6 25.bc6 Bc7 26.Ra1+–) 25.Bb4 Rc6 26.Qc6 Qc6 27.bc6 Ne4 (27...Ne8+–) 28.Bc4 Rc7 (28...a5 29.Ra1 Ng5 30.Ra5 Ba5 31.Ba5 Rf8+–) 29.Be6 Kh8 30.Bf5 Nf6 31.Rc1 (31...g6 32.Be6+–) 1–0. marekt (2055) – Daveygravey (1710), ChessWorld.net, 2003.

5.Nf3 c5 6.bc5 Bc5 7.d4 Bb6 (7...Bc6 8.Ra2 Be7 9.Bd3) 8.Nbd2 (8.Bd3 Nf6) 8...Bc6 9.Ra3 Nf6 10.Bd3 a5 11.e4 0–0 12.e5 (12.0–0 d6) 12...Nd5 13.Nc4 Bc7? (better is 13...Nb4!?) 14.Bh7!+– Kh8 (14...Kh7 15.Ng5) 15.Ng5 (better is 15.Bd3) 15...f6?? (better is 15...g6) 16.Bg6 Kg8 (16...Ne7 17.Qh5 Kg8 18.Qh7) 17.Qh5 Rf7 (17...Re8 18.Bh7 Kf8 19.Qf7) 18.Bh7 Kh8 (18...Kf8 19.Qf7) 19.Nf7 1–0. pierre – michas, ChessHere.com, 2005.

5.Nf3 Nf6+=.

3.Ra4 c5

4.bc5 Ba6 5.Nf3 Qc7 6.d4 g6 (6...Nf6 7.c4+–) 7.Nc3 (better 7.c4+–) 7...Nc6?? (better 7...Nf6+–) 8.Ra6 Nb8 (8...Bh6 9.Bh6 Nh6 10.e4+–) 9.Ra3 e5 (9...Bh6 10.Bh6 Nh6 11.Nd5+–) 10.Ne5 f6 (10...Nc6 11.Nc4 Nf6 12.Nb5+–) 11.Nc4 (better 11.Nb5 Qb7 12.Rb3+–) 11...Ne7 (11...a6+–) 12.Nd6 (12.Nb5 Nd5 13.Nc7 Nc7+–) 12...Kd8 13.Nf7 Ke8 14.Nb5 Nbc6 15.Nc7 Kf7 16.Na8 Bg7 17.Nc7 Nf5 18.e4 Nfe7 19.d5 Ne5 20.f4 (20.f4 Rb8 21.fe5+–) 1–0. Janek – mi1320, internet, 2018.

4.bc5 e5 5.Nf3+=.

4.e3 e5 5.b5 a6 6.c4 d5 7.Bb2 dc4 8.Bc4 a5 9.Qf3 Ra7 10.Be5 Nd7?? 11.Qf7 1–0. Trkn – nickshepp, itsyourturn.com, 2001.

3.Ra4 c6

4.Bb2 Ba6 5.Nf3 f6 (5...Nf6!?+–) 6.e3 Bf1 7.Kf1 (7.Rf1 Nh6+–) 7...e6 8.Kg1 (8.Na3!?+–) 8...a5+– 9.Bc3 (9.Nh4 Nh6 10.Qh5 Nf7 11.Ra5 Na6=) 9...Na6+= 10.ba5 Nc5 11.Ra1 Ne4 12.a6 Nc3 (better 12...Nh6!? 13.d3 Nc3 14.Nc3 Qb6+=) 13.Nc3+– (13.dc3?! Qb6+–) 13...Bd6 14.Ne4 (14.Qe2 Ne7+–) 14...Bc7 (14...Be7 15.g3+–) 15.Nd4 (15.Nh4 g6 16.Ra4 Nh6+–) 15...Ne7 (15...f5!? 16.Nc5 Nf6+–) 16.Qh5+– Ng6 17.Qc5 White intends a7 (better 17.g3+–) 17...d6?? (better 17...f5 18.Nd6 Bd6 19.Qd6 Qe7+–) 18.Qc6+– Kf7 (18...Ke7 19.a7 Bb6 20.Nb5+–) 19.Nb5 Rc8 (19...f5 20.Nc7 fe4 21.Na8 Qa8 22.Qd6+–) 20.a7 Bb6 (20...Ke7 21.a8Q! Ra8 22.Ra8 Qa8 23.Qc7 Kf8+–) 21.Nbd6 Kf8 22.Nc8 Ne7 23.Qe6 Nc8 24.a8Q Qd2 1–0. DEFFM – GuestBCPZ, freechess.org, 2018.

4.c4 a5 5.e3 (5.Qb3 Na6 6.Ra5 c5=) 5...e6 6.c5 Bb7 (6...Ba6 7.d4=) 7.d4 d5 8.Nf3 Nd7 (8...ab4 9.Ra8 Ba8 10.Bd2) 9.b5+/– cb5 10.Bb5 Qc7 11.Ne5 Ngf6? (11...Bc8 12.Qh5 g6 13.Qf3) 12.Qc2?? (better is 12.c6 Bc6 13.Bc6+–) 12...Be7 13.Nd7 Bc6?? (better is 13...Nd7 14.c6 0–0) 14.Nf6 Bf6 15.Bc6 Qc6 16.Bd2 Bd8 17.0–0 0–0 18.Nc3 Rb8 19.Rb1 Rb1 20.Qb1 Bc7 21.Qb5 Qb5 22.Nb5 Rb8 23.Nc3 Rb2 24.Ra2 Ra2 25.Na2 h6 26.Nc3 g5 27.Na4 Kf8 28.Nb6 a4 29.Na4 Ke7 30.Nb6 f5 31.Bb4 Kd8 32.Na8 Kd7 33.Nc7 Kc7 34.Ba5 Kc6 35.Bd8 g4 36.h3 h5 37.hg4 hg4 38.f3 gf3 39.gf3 (39...Kb5 40.Bf6+–) 1–0. Pohl,Manfred – Kalder,Walter, Bahn–chG Fuessen, 1993.

4.c4 d5 5.e3=.

4.d4 d5.

4.e3 a6 5.c4 Bb7 6.b5 ab5 7.Ra8 Ba8 8.cb5 Bb7 (8...cb5!? 9.Qb3 Qa5=+) 9.bc6 Bc6 (9...Nc6 10.Nf3=) 10.Bb2 Nf6 11.Bf6 ef6 12.Nf3 Bf3 (12...Qa5!?=) 13.Qf3+= Be7 (13...Bd6 14.Nc3+=) 14.Bc4 0–0 15.0–0 Nc6 16.d4 Na5 17.Bd5 Nc6 (17...Qc7 18.Nd2+–) 18.Bc6 dc6 19.Qc6 Re8 20.Rc1 Kf8 21.Nc3 h6 22.Nd5 Ba3 23.Rc3 Bb2 (better 23...Bd6+–) 24.Rc2 (24.Qc5 Kg8 25.Rb3 Qa8+–) 24...Ba3? (better 24...Bd4!? 25.Rc1 Be5+=) 25.Ra2+– Be7?? (25...Bd6 26.g3+–) 26.Ra7 (better 26.Nb6 Qd6 27.Nd7 Kg8 28.Nf6 Qf6 29.Qe8 Kh7+–) 26...g5?? (26...Qb8 27.Rb7 Qa8+–) 27.Ne7 (better 27.h4 Bd6 28.Rd7 Qb8 29.Rd6 Rc8+–) 27...Re7 (27...Qb8 28.h4 Qb1 29.Kh2 Re7 30.Ra8 Kg7+–) 28.Re7 (better 28.Qf6 Rd7 29.Ra8 Qa8 30.Qh8 Ke7 31.Qa8+–) 28...Qe7 29.g3 Kg7 30.h4 (30.g4 Qb4+–) 30...gh4 31.gh4 f5 32.Qg2 Kh7 33.h5 (33.Qg3 Qe4+–) 33...Qh4 (33...f4 34.e4 Qd6+–) 34.Qh2 (34.Qf3!? f4+–) 34...Qg5 (34...Qg4!? 35.Kf1 Qd1 36.Kg2 Qg4 37.Qg3 Qh5+–) 35.Kf1+– Qe7 (35...f4 36.Qf4 (36.ef4?! Qb5 37.Kg2 Qd5 38.Kg3 Qd4+=) 36...Qh5 37.e4+–) 36.d5 (36.Qf4 Qe6+–) 36...Qd7? (36...Qe4!? 37.Qg2 Qb1 38.Ke2 Qc2 39.Kf3 Qe4 40.Kg3 Qg4 41.Kh2 Qh4 42.Kg1 Qh5+=) 37.d6 (better 37.Qe5+–) 37...Qb5= 38.Kg2 Qd5 39.Kh3 (better 39.f3 Qd2 40.Kg3 Qe3 41.Qc2 Qe5 42.Kg2 Qd6 43.Qf5 Kg7 44.Kh3=) 39...f6?? (better 39...Qf3 40.Qg3 Qh1 41.Qh2 Qf3 42.Qg3 Qh1 43.Qh2 Qf3=) 40.Qf4 (better 40.Qg2!? Qd6 41.Qg6 Kh8 42.Qh6 Kg8 43.Qg6 Kh8 44.Qf5 Kg7+–) 40...Kg7 41.f3 (41.Kh2 Qd1 42.Kg2 Qd3+–) 41...Qe6? (41...Qd1 42.Qg3 Kf7 43.Qg6 Ke6 44.Qe8 Kd5 45.Qa8 Ke6 46.Qg8 Ke5 47.Kh2 Qe2 48.Qg2 Qe3 49.d7+–) 42.e4?? (better 42.Kh4+–) 42...fe4+= 43.Kg3 (43.Qg4 Qg4 44.fg4=) 43...ef3= 44.Kf3 Qd5 45.Kg3 f5 46.Kf2 Qc5 47.Ke2 Qd5 48.Ke3 Qe6 49.Kd4 Qd7 (49...Kf7 50.Qe5=) 50.Qe5 (better 50.Qg3 Kf8 51.Ke5 Qe8 52.Kf5 Qh5 53.Kf6 Qf7 54.Ke5 Qe8 55.Kd5 Qb5 56.Kd4=) 50...Kh7?? (better 50...Kf7=) 51.Kd5 (51.Qe7 Kg8 52.Qd7 f4 53.Qe7 f3 54.d7 f2 55.d8Q) 51...Qf7? (51...Qb5 52.Ke6 Qe8 53.Kf5 Qh5 54.Kf6 Qh4 55.Ke6+–) 52.Qe6 (52.Kc6 Qc4 53.Kd7 Qg4+–) 52...Qh5 53.d7 Qf3 54.Kd6 Qd3 (54...Qa3 55.Kc7 Qa5 56.Qb6 Qc3 57.Kb7 Qg7+–) 55.Ke7 Qa3 (55...Qe4 56.Qe4 fe4 57.Kf6 h5 58.d8Q h4 59.Qf8 h3 60.Qg7) 56.Ke8 (56.Kf7 Qa2 57.Qa2 h5 58.Qb2 h4 59.Qg7) 56...f4 (56...Qa4+–) 57.Qf5 (57.Qf7 Kh8 58.d8Q Qa8 59.Qa8 f3 60.Ke7) 57...Kg7 (57...Kh8 58.d8Q Qa8 59.Qa8 Kg7 60.Qb7 Kg8 61.Qf8) 58.d8Q (58.Qf7 Kh8 59.d8Q Qa8 60.Qa8 f3 61.Ke7) 58...Qa4 (58...Qe3 59.Qe7 Qe7 60.Ke7 f3 61.Qg4 Kh7 62.Kf6 f2 63.Qg7) 59.Qdd7 Qd7 60.Qd7 (60.Qd7 Kf6 61.Qg4+–; 60.Kd7 h5 61.Ke6 h4 62.Qg5 Kf8 63.Qg6 f3 64.Qf7) 1–0. AleksandrNekhoroshik – Kireeti356, lichess.org, 2020.

4.e3 a6 5.d4 e6 (5...d5 6.Bd3) 6.Nf3 (6.Bd3 d5) 6...d5 7.Bd3 (7.Bd2 Bd6) 7...Bd6 (7...Bd7 8.c4) 8.0–0 Qf6 (8...Nf6!?) 9.c3+/– Bd7 (9...Qd8 10.Nbd2) 10.Nbd2 (10.e4 de4 11.Be4 Qd8) 10...e5 (10...Bc7 11.e4) 11.e4 c5? (better is 11...Ne7) 12.dc5+– Ba4 (12...Bc5 13.bc5 Ba4 14.Qa4 Qc6 15.Qc6 Nc6 16.ed5+–) 13.Qa4 Nd7 14.ed5 e4 (14...Bb8 15.c6 Nb6 16.c7 Kf8 17.cb8Q Rb8+–) 15.Ne4 Ne7 (15...Bh2 16.Kh2 Qd8+–) 16.Nf6 gf6 17.cd6 Nd5 18.Qc6 Rc8 19.Qc8 1–0. marekt – LAME WOLF, internet, 2005.

4.e3 Na6?? 5.Ba6 Ba6 6.Ra6 e5 7.Qg4 Nf6 8.Qc4 Be7 9.Nf3 e4 10.Ne5 0–0 11.0–0 Qc7 12.Nc3?? Qe5 13.Ra5 Qc7 14.Ba3 d5 15.Nd5! Nd5 16.Rd5 a5 17.c3 h6 18.Ra1 Rfc8 19.Ra5 Bd6 20.Ra8 Ra8 21.Bb2 Re8 22.h3 Be5 23.Ra6 Qd6 24.Bc1 Rc8 25.b5 Qb8 26.Rc6 Rf8 27.b6 Qa8 28.Bb2 Rd8 29.Qe4 Rd2 30.Qe5 Qc6 31.Qc7 Rd6 32.Qc6 Rc6 33.b7 Rb6 34.Ba3 Rb7 35.Bb4 Kh7 36.f3 f5 37.e4 fe4 38.fe4 Rb5 39.Kf2 Kg6 40.Ke3 Kf6 41.h4 h5 42.Kd3 Ke5 43.Bf8 Rb7 44.Bc5 g6 45.Bd4 Kd6 46.Ke3 Rf7 47.c4 Rg7 48.Bg7 1–0. Trkn – Superfish, itsyourturn.com, 2000.

4.e3 Qb6 5.Bb2 e6 6.Bd4 Qb7 7.Nc3 Bb4?? (better is 7...d6 8.Qa1 a6=) 8.Bg7+– Bd6 (8...e5 9.Bh8 d6 10.Na2+–) 9.Bh8 1–0. marekt – pehh, internet, 2014.

4.e3 Qc7 5.Nf3 e6 (5...e5 6.e4+=) 6.Bb2 Qb7 7.c4 Bb4?? (better 7...d5+=) 8.Bg7+– Bc5 (8...Na6 9.Bh8 Nc5 10.Ra2+–) 9.Bh8 Qb6 10.Bd3 Nh6 (10...h6 11.Ne5 d6 12.Nf7+–) 11.Bh7 Ng4 (11...Na6 12.Bg7 Nf5 13.Bf5 ef5 14.Bc3+–) 12.Ng5 Ne3 (12...Nh6 13.Bg7 Bf8 14.Bf8 Kf8 15.Qh5+–) 13.fe3 Be3 14.Qh5 Bf2 (14...Bg5 15.Qg5 Na6 16.Qg8 Ke7 17.Be5+–) 15.Ke2 Qe3 16.de3 Ba6 (16...Kd8 17.Bf6 Kc7 18.Ne6 fe6 19.Qa5 Kd6 20.Rd1) 17.Qf7 (17.Bf6 Bc4 18.Rc4 Be3 19.Qf7) 17...Kd8 18.Ne6! Kc8 (18...de6 19.Rd1 Mate attack) 19.Qf8 Kb7 20.Rb4 Bb5 21.Nc5 (21.cb5 Be3 22.bc6 Ka6 23.Bd3 Ka5 24.Rb5 Ka4 25.Qb4) 21...Kc7 (21...Kb6 22.Qd6 a6 23.Na4 Ka5 24.Bc3 Bc4 25.Rc4 Kb5 26.Na3) 22.Be5 Kb6 23.Qd8 (23.Qd8 Kc5 24.Qa5 a6 25.Nc3 Be3 26.Ne4; 23.Rb5 cb5 24.Qd6 Nc6 25.Nd7 Kb7 26.Qc7 Ka6 27.Nc5) 1–0. DEFFM – GuestKKZY, freechess.org, 2018.

4.e3 d5 5.Nc3 Bd7 6.Nf3+= (6.d4 Nf6 (6...Qb6 7.Ba3 Nf6 8.Nf3 Bg4 9.Bd3 Nbd7) 7.Nf3 e6 8.Ne5 Bd6 9.Bd3 Bc8) 6...c5 (6...e6 7.Ne5 Bd6 8.d4 Nf6 9.Bd3 Qe7; 6...Nf6 7.Ne5 e6 8.d4 Bd6 9.Bd3 Qe7) 7.b5 a6 (better is 7...Nf6!?+= 8.Be2 Qc7 9.d4 e6) 8.Nd5+/– e6 (8...Nf6 9.Nc3+/– Qc7) 9.Nc3+– c4 (better is 9...Qc7+–; 9...Bd6+–) 10.Ne5 f6?? (10...Nf6+–) 11.Qh5 g6 12.Ng6! hg6 (12...hg6 13.Qg6) 13.Qg6 Ke7 14.Ba3 1–0. pereira – qufup, internet, 2009.

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

4.e3 e5 5.d4.

4.e3 Nf6 5.Nf3 g6 6.Bb2 Bg7 7.Nc3 0–0 8.Qa1 a6 9.Ne4 Ne4 10.Bg7 Re8 11.Bh6 f6 12.d3 Nd6 13.e4 e5 14.Be3 Nb5 15.c4 Nc7 16.Be2 d5 17.0–0 de4 18.de4 Ne6 19.Rd1 Qe7 20.c5 Nd7 21.Bc4 Ndf8 22.Rd6 Bb7 23.Ra2 Red8 24.Rad2 Rd6 25.cd6 (25.Rd6 Rd8 26.Ne5 fe5 27.Qe5 Bc8+–) 25...Qd7 26.Qa5 Kg7 (26...Re8+–) 27.Ne5! fe5 (27...Qe8 28.Ng4 h5 29.Bh6 Kf7 30.Nf6+–) 28.Qe5 Kg8 29.Bh6 Re8 (29...a5 30.Bf8 Re8+–) 30.Rd3 (30.Rd3 g5 31.Rf3 Qf7 32.Rf7 Ba8 33.Qg7 Ng7 34.Rg7 Kh8 35.Rg8) 1–0. b4_player – idyll, casual, 2013.

4.Nf3 d5 5.Bb2+=.

4.Nf3 d6 5.e4 e5 6.d4 Bg4 (6...ed4 7.Nd4 Nf6 8.Nc3+=) 7.de5+– Be6 (7...Nd7!? 8.ed6 Nb6+–) 8.Bf4+– Nd7 (8...de5 9.Qd8 Kd8 10.Ne5+–) 9.ed6 Nb6 (9...a5 10.e5+–) 10.Ra5 Qd7 11.Nc3 Bc4 12.Re5 Be6 13.Rc5 Nc8 (13...Rc8+–) 14.Nb5! Be7 (14...cb5 15.Bb5 Decoy) 15.Nc7 Kf8 (15...Qc7 16.dc7 Nf6 17.Rc6+–) 16.de7 Ke7 (16...Qe7 17.Na8 Nf6 18.Nd4+–) 17.Qd7 Bd7 18.Na8 Nf6 19.Nc7 Nb6 20.Bd3 Rd8 21.Re5 (21.Ne5 Ng4+–) 21...Kf8 22.0–0 (22.Ra5 Nc8+–) 22...h6 23.Ra1 (23.Ra5 Ke7+–) 23...Nc8 24.h3 Ne7 25.Ra7 Ng6 26.Be3 Ne5 27.Ne5 Ke7 28.Bc5 1–0. PeterRs – Tony _ R, ChessWorld.net, 2016.

4.e3 a5

5.Bb2 e6 6.f4 Bb7 (6...Bb4?? 7.Bg7 Na6 8.Bh8+–) 7.ba5 Ra5 8.Nc3 Nf6 9.Nf3 Be7 10.Be2 h6 (10...Na6 11.Ne5=) 11.Qa1 (11.Ra5 Qa5 12.0–0 c5+=) 11...Ra4 12.Qa4 0–0 13.0–0 Qc7 (13...c5 14.Ra1+=) 14.Rb1 (14.Qa7 c5+=) 14...c5 (14...Na6 15.Ne4 Ne4 16.Qe4+= (worse 16.Ba6 Ba6 17.Qe4 Qb7=)) 15.Nb5+– Bc6 16.Bc3 Bb5 17.Bb5 Nd5 18.Be5 (18.Ba5 Qb7 19.Rb3 Bf6+–) 18...d6+= 19.Ba1 Nb4 (19...Bf6 20.Bf6 Nf6 21.Ra1+=) 20.e4 N8c6? (better 20...Rc8+–) 21.c3+– Nd3 (21...Rb8 22.cb4 Nb4+–) 22.Bd3 (worse 22.Bc6 Rc8 23.Bd7 Rd8+–) 22...f5 (22...d5 23.Bb5 Na7 24.Be2+–) 23.Qa2 Kh8 (23...Nd8 24.ef5 d5 25.c4+–) 24.Qe6 fe4 (24...Qc8 25.Qd5 Bf6 26.ef5 Ne7+–) 25.Qe4 Bf6 26.Qh7 1–0. Ddgs – Zizwe, internet, 2019.

5.b5 cb5 6.Bb5 Ba6 7.Ba6 Ra6 (7...Na6 8.Ba3=) 8.Nf3 Qb6 (8...e6 9.Bb2+=) 9.Nc3 (9.Ba3 Nf6+=) 9...Nc6 (9...e6 10.0–0+=) 10.0–0 (10.Ba3 Nf6+/–) 10...e6 11.Qe2 Bb4 (11...Ra7 12.e4+=) 12.Nb5+/– Nge7 (12...Ra8 13.Bb2 f6 14.Bd4 Nd4 15.Nfd4+=) 13.c3 (better is 13.Nc7 Qc7 14.Qa6+–) 13...Bc5? (better is 13...0–0 14.cb4 ab4 15.Ra6 Qa6+–) 14.d4+– Bd6 (14...Na7 15.Na7 Ra7 16.dc5 Qc5+–) 15.Nd6 Kf8 16.Ba3 Qb3 (16...Ra8 17.Ne5 Ne5 18.de5 Kg8+–) 17.Qa6 Qa4 (17...g5 18.Qc4 Qc4 19.Nc4 f6+–) 18.Qa8 Nc8 (18...Nb8 19.Qb8 Nc8 20.Nf5 d6 21.Qc8 Qe8 22.Bd6 Kg8 23.Qe8) 19.Nf5 d6 20.Qc8 Nd8 Plans Qe8 21.Qd8 Qe8 22.Bd6 (22.Bd6 Kg8 23.Qe8 1–0. b4_player – opponent, gamecolony.com, 2007.

5.d4 e6 (5...Ba6!?=) 6.Bd2+– Bb7 (6...Ba6 7.Ba6 Ra6 8.ba5+– (8.Ra5?! Bb4 9.Ra6 Na6=)) 7.ba5 Ba6 (7...c5 8.dc5 Bc5 9.Nf3+–) 8.Ba6 Na6 9.Nf3 Rb8 (9...d5 10.0–0+–) 10.0–0 Nf6 11.Qe2 Ne4?? (better 11...Qc8+–) 12.Qa6 Nd2 13.Nbd2 Bb4 (13...Ra8 14.Qd3 Ra5 15.Ra5 Qa5 16.Rb1+–) 14.Rb1 Bd2 15.Rb8 Qb8 16.Nd2 Qb2 (16...0–0 17.Qb6 Qd6 18.a6+–) 17.Qa8 Ke7 18.Qh8 Qc2 19.Ra1 Qd2 (19...Qb2 20.Nb3! Qb3 21.Qh7+–) 20.Qh7 Qc3 (20...g6 21.Qh4 Kf8 22.Qd8 Kg7+–) 21.Qb1 f5 22.a6 1–0. DEFFM – GuestPKBF, freechess.org, 2018.

5.Nf3 e5+=.

5.Nf3 h6 6.b5 Qb6 7.Nc3 e6 8.Ne5 Nf6 9.Nc4 Qc5?? (better is 9...Qd8+=) 10.Ba3+– (10.Ra5?! Ra5 11.Na5 cb5+/–; 10.Na5?! cb5 11.Nb5 Na6+–) 10...Qg5 11.h4 (11.Na5?! Ba3 12.Ra3 cb5+/–) 11...Qg4 (11...Qg6 12.Nb6 Ba3 13.Ra3+– (13.Na8?! Bb4+–; 13.Nc8?! Bb4 14.b6 Na6 15.Ba6 Qg2+–)) 12.Qg4 Ng4 13.Bf8 Kf8 14.Nb6 (14.Na5?! cb5 15.Bb5 Nf6+/–; 14.Ra5?! Ra5 15.Na5 cb5+/–) 14...Bb7 15.Na8 (worse is 15.Rg4 Ra7+–) 15...Ba8 (15...cb5 16.Nb5 Ba8 17.Rg4+–) 16.Ra5 Bb7 17.Ra7 cb5 18.Rb7 Ke7 19.Bb5 Rd8 20.Ke2 f5 21.Ra1 Nf6 22.Raa7 h5 (22...Re8 23.Rb6 Kf8 24.f4+–) 23.Rb6 g6 (23...Rc8 24.Rab7+–) 24.Rab7 Nd5 (24...Ne8 25.Rb8 Rb8 26.Rb8+–) 25.Nd5 ed5 26.Rb8 1–0. marekt – DGM11, ChessWorld.net, 2012.

3.Ra4 Nc6

4.b5 Nb8+=.

4.b5 Nd4?? 5.Rd4+– a5 (5...a6 6.e4+–) 6.Nc3 c5 (6...Bb7 7.Ra4+–) 7.bc6 dc6 (7...e5 8.cd7 Bd7+–) 8.Rd8 (8.Rd8 Kd8 9.Nf3+–) 1–0. pierre – tavjyp, internet, 2010.

4.b5 Ne5 5.Bb2 Bb7?? 6.Be5+– f6 (6...d6 7.Bg3+–) 7.Bb2 e5 (7...a6 8.ba6 Ra6 9.Ra6 Ba6 10.Nc3+–) 8.e3 Ne7 9.Qh5 (9.Nc3 c5+–) 9...g6 10.Qh3 g5 (10...a6 11.Nc3 ab5 12.Bb5 Ra4 13.Ba4+–) 11.Qh5 Ng6 12.h4 c6 (12...gh4 13.Bd3 Bg7 14.Nc3+–) 13.hg5 cb5 14.Bd3 ba4 (14...Bg7 15.Bg6 hg6 16.Qg6 Ke7 17.Qg7 Ke6 18.Qh8 Qh8 19.Rh8 Rh8 20.Ra7 Bg2+–) 15.Bg6 Ke7 16.gf6 Kf6 (16...Kd6 17.Qe5 Kc6+–) 17.Qe5 Kg6 18.Qh5 1–0. guest400 – HIGHHOPES, chessclub.com, 2019.

4.b5 Ne5 5.Bb2 d6 6.e3 Bd7 7.Nf3 f6 8.d4 Nf7 9.d5 e6 10.de6 Be6 11.Nc3 Ngh6 (11...Ne5 12.Nd4 Bd7 13.Nd5+/–) 12.Nd4 Qd7 (better is 12...Bg4 13.f3 Bd7+–) 13.b6! c6? (13...ab6 14.Ra8 Pinning (14.Ra8 Deflection); 13...cb6 14.Bb5 Combination) 14.Ncb5! (14.Ne6 Qe6 15.Nb5 cb5 16.Bb5 Kd8+–) 14...a6 (14...cb5 15.Bb5 Decoy) 15.Nc7 Ke7 16.Na8 Qb7 (16...Bg4 17.f3 Ne5 18.Ra6 Qc8 19.fg4 Kf7+–) 17.Ba6 Qa8 18.b7 Qe8 19.Bb5! cb5 20.Ra8 Nd8 21.b8Q Bd7 22.Qc7 Nhf7 23.Nf5 Ke6 24.e4 Ne5 (24...Bc6 25.Nd4 Ke5 26.Ne2 Ke4 27.Qd3) 25.Qd5 1–0. marekt – spensley, internet, 2014.

4.b5 Ne5 5.Bb2 d6 6.e3 Bd7 7.f4 Ng4 8.Be2 N8f6 9.c4 Nh6 10.Nf3 e6 11.0–0 Be7 12.Bd4 c5 13.bc6 Bc6 14.Ra7 Ra7 15.Ba7 Qa8 16.Bd4 0–0 17.d3 Nf5 18.e4 Nd4 19.Nd4 Bb7 20.Nc3 Rc8 21.Qa1?! d5! 22.Qa8 Ba8 23.e5 Nd7 24.Na4 dc4 25.dc4 g6 26.g3 Kg7 27.Kf2 Bb7 28.Rc1 Nc5 29.Nc5 Bc5 30.Ke3 f5 31.Rb1 Be4 32.Bd3? Bd4! 33.Kd4 Rd8 34.Kc5 Rd3 35.Rb6 Kf7 36.Rd6 Ke7 37.Rd3 Bd3 38.Kd4 Bf1 39.Kc5 Kd7 40.Kb5 Kc7 41.Kc5 Bg2 42.Kb5 h5 43.h4 Be4 44.Kc5 Bc6! 45.Kd4 Kb6 46.Kd3 Kc5 47.Kc3 Bg2 48.Kd3 Bf1 49.Ke3 Kc4 50.Kf2 Bh3 51.Ke3 Kc3 52.Kf3 Kd3 53.Kf2 Bg4 54.Kg2 Ke2 55.Kg1 Kf3 0–1. Trkn – Caissa, itsyourturn.com, 2000.

4.b5 Ne5 5.d4 Ng4 6.e4 e5?? 7.Qg4+– ed4 8.e5 Rb8 9.Ra7 d5 10.Qd4 Rb5 11.Bb5 Bd7 12.Bd7 Qd7 13.Ra8 Ke7 14.Ba3 Ke6 15.Qg4 f5 16.ef6 Kf7 17.Rf8# 1–0. pierre – weakplayer, ChessHere.com, 2005.

4.b5 Ne5 5.d4 Ng6 6.e4 Bb7 7.d5 Nf6 8.Nf3 Ne4?? (Better is 8...e6 9.Nc3 Bc5+=) 9.Re4+– f5 (9...e6 10.Nc3+–) 10.Rd4 a6 11.Qd3 ab5 12.Qf5 (12...Ra1 13.Ng5+–) 1–0. Marre – kamikadzel, zagraj.pl, 2003.

3.Ra4 d5

4.Bb2 Qd6 5.e3 (5.Nf3 Nd7) 5...Nf6 6.c4 dc4 7.Bc4 Nbd7 8.Bd4 Bb7 9.Nf3 e5 (9...Nb6 10.Bc5 Qd8 11.Bb6 ab6 12.Ne5) 10.Bc3 (10.Ba7 e4 11.Nd4 Nd5+–) 10...Nb6 11.Bf7?? (better is 11.Ne5 Nc4 12.Nc4=) 11...Kf7–+ 12.Ne5 Ke8 13.Ra5 Bd5 (13...Bg2 14.Rg1 Bd5 15.d3–+) 14.f4 Qe6 15.0–0–/+ Bd6 16.f5 Qe7–+ 17.d4 Nbd7 18.Qa4–/+ c6 19.Ra7 Ra7 20.Qa7 Ne5 21.Qe7 Be7 22.de5 Ng4 23.Re1 Be4–+ 24.h3 Bh4 (25.Rc1 Bf2 26.Kh1 Ne3–+) 0–1. Wartig,Wolfgang – Andersson,Lars H, corr SOK–92–80, 1992.

4.Bb2 e6 5.e3 c6 (5...Nf6 6.Nf3) 6.Nf3 Nd7 7.b5 (7.Ne5 Ne5 8.Be5 a5) 7...Nb6 8.Ra2 (8.Ra5 Nc4 9.Ra2 cb5–/+) 8...c5 (8...cb5 9.Bb5 Bd7 10.Ba6) 9.Ne5 (9.Be2 Nf6) 9...Ne7 (9...Nf6 10.Nc6 Qc7 11.Bf6 gf6 12.Qf3) 10.Qf3 f6 11.Nd3 Ng6 (11...c4 12.Nc5=) 12.Nf4 (better is 12.Ba3 c4 13.Bf8 Rf8 14.Nc5=) 12...Ne5? (better is 12...Nf4 13.ef4 Bd6=) 13.Be5+/– fe5 14.Qh5 Ke7 (better is 14...Kd7 15.Ng6! Qe8 16.Ne5 Ke7 17.Qh4 Kd6+–) 15.Ng6! hg6 16.Qh8 Kf6 (16...Bb7 17.Nc3+–) 17.f4 Qd6 (17...ef4 18.ef4 g5 19.fg5 Ke7 20.Bd3+–) 18.fe5 (18.Qh4 Kf7+–) 18...Ke5 19.Qh4 d4 (19...g5 20.Qg5 Ke4 21.Nc3) 20.Qf4 Kd5 21.e4 1–0. Myslowski,Karol – Ergo,E, Paris op–B, 1996.

4.Bb2 Nf6 5.e3 Bd7 6.b5 c6 7.Na3 cb5 8.Nb5 a6 9.Nf3 Bb5 (9...Bc6!? 10.Qa1 Qb6 (10...ab5 11.Ra8 Ba8 12.Qa8)) 10.Bb5+/– Nfd7 11.0–0 Qb6 12.Qe2 e6 13.Bd4 Bc5 (13...Qc7!?) 14.Bg7+– Rg8 15.Bc3 Ke7 16.Rfa1 Qb7 17.Bd3 Nc6 (17...h5 18.Bb5+–) 18.Bh7 Rh8 (18...Rgb8+–) 19.Bh8 Rh8 20.Bd3 (20.Qa6?! Qa6 21.Ra6 Ndb8+–) 20...Nde5 (20...a5 21.Bb5+–) 21.Ba6 Qc7 22.h3 Nf3 23.Qf3 (23.gf3?! Rh3 24.f4 Kd8+–) 23...Ne5 (23...Bd6 24.Bb5+–) 24.Qg3 Bd6 25.Qg7 Ng6 26.Bd3 Be5 27.Ra7 Bg7 28.Rc7 Kd6 29.Raa7 Rb8 (29...Ne5 30.Rcb7 Rc8 31.Rb6 Kc5 32.Rab7+–) 30.Rd7 Kc6 31.Bg6 Be5 (31...Rb1 32.Kh2 Be5 33.f4+–) 32.f4 (32...fg6 33.fe5+–) 1–0. pierre – ravi12346, internet, 2007.

4.b5 Qd7 5.e3+– Na6 (5...c5!?+–) 6.Ra6+– Ba6 7.ba6 Qa4? (better 7...Rb8 8.Nc3 e6+–) 8.Nc3 Qa1 (8...Qd7 9.Nf3 f6+–) 9.Bb5 Kd8 10.Nf3 e6 (10...Rb8 11.Ne5 Rb5 12.Nf7 (12.Nb5?! Qe5 13.c4 Qe4+–) 12...Ke8 13.Nh8+–) 11.Nd4 Ba3 (11...Rb8 12.Nc6 Kc8 13.Na7 Kd8 14.Nc6 Kc8 15.Nb8 Kb8+–) 12.Nb3 (12.Nb3 Qc1 13.Nc1+– (13.Qc1?! Bc1 14.Nc1 Ne7+–)) 1–0. Leonco – Gonce, internet corr, 2018.

4.b5 Nd7 5.Nf3 Ngf6 6.d4 e6 7.Bg5 Bb7 8.Nbd2 c5= 9.e3 Bd6 10.c4 Nb6+= 11.Ra2 cd4 12.ed4 dc4 13.Nc4 Bb4 14.Bd2 Qe7 15.Nb6 ab6 16.Ra8 Ba8 17.Qa4 Bd2–/+ 18.Nd2 0–0 19.f3 Nd5 20.Bd3? Qg5–+ (20...Qg5 21.Nc4 Nf4–+) 0–1. kode (2315) – pierred (2540), net–chess.com, 2007.

4.e3 e6 5.Nf3 Bd6 6.Be2 Bd7 7.b5 c5 8.c4 a5 (8...a6 9.d4 dc4 10.Bc4+=) 9.0–0 dc4 10.Na3 Ne7 11.Nc4 Bc8? (better is 11...Bc7!? 12.Qb3 Nd5+/–) 12.d4 0–0 (12...cd4 13.Qd4 (13.Nd4?! Bc7+/–; 13.Nd6?! Qd6 14.Ba3 Qb6+/–) 13...Nf5 14.Nd6 Qd6 15.Qc3+–) 13.Ba3 (13...Nd5 14.dc5+–) 1–0. Mehlhorn,Uwe – Ritschel,Stephan, remoteschach.de, 2003.

4.e3 Nf6 5.c4 (5.Bb2 Bd7 6.b5 c6 7.bc6 Bc6=) 5...Bd7 6.b5 e6 (6...c6 7.Nc3=) 7.Nc3 dc4 (7...c6 8.Ba3=) 8.Bc4 Be7 (8...c6 9.Bb2=) 9.Nf3. Goldmund,Heike – Puzanov,Vasyl, FICGS, 2017.

4.Nf3 Bd7 5.Ra1 e6 6.c3 c5 7.bc5 Bc5 8.d4 Bd6 9.e3 Nf6 10.Ba3 Ba3 (10...Qa5 11.Bd3=) 11.Na3 Qa5 12.Nd2 0–0 13.c4 a6 14.Be2 Qc7 15.0–0 Nc6 16.cd5 ed5 17.Nb3 Ne7 18.Nc5 Qd6 19.Nb1 a5 20.Qd2 a4 (20...Nc6 21.Nc3) 21.Nc3+/– (< 21.Nd7 Qd7 22.Qa2 Ra5=) 21...Rfc8 22.N3a4 Ba4 23.Ra4 Ra4 24.Na4 Ne4 25.Qd3 Ra8 26.Nc3 Qe6 27.Ne4 de4 28.Qb1 f5 (28...Nd5 29.Bc4 Rd8 30.Qb7) 29.Rc1 Qd6 30.Qb3 Kf8 31.Bc4 Rc8 32.Rd1 Rc6 33.Qa2 g6 34.Rb1 Kg7 35.Rb7 (35...Rc7 36.Rc7 Qc7 37.Qa6) 1–0. marekt (2025) – Mystra (2200), ChessWorld.net, 2003.

4.g3 Bd7 5.Ra5 (5.Ra2!?=) 5...e6–/+ 6.c3 (6.Bb2 Nf6–/+ (6...Bb4?! 7.Ra7 Ra7 8.Bg7=)) 6...c5 7.Bg2 (7.Ba3 Nc6 8.Ra4 cb4 9.cb4 Ne5–/+) 7...cb4 8.Ra1 a5 (8...Nc6 9.Nf3–/+) 9.cb4 (9.Nf3 Nf6–/+) 9...Bb4 10.Qb3 (10.Ba3 Na6–/+) 10...Nf6–+ 11.Ba3 (11.Nf3 0–0–+) 11...Nc6 12.Nf3 (12.Bb4 ab4 13.Ra8 Qa8–/+) 12...e5 (12...Rb8 13.Bb4 Rb4–+) 13.Ne5 (better is 13.Bb4!? ab4 14.Ra8 Qa8 15.Qb2–+) 13...Ne5 Black gets in control 14.Bb4 ab4 15.Ra8 Qa8 16.Qb4 Nc6 17.Qc3 0–0 18.0–0 Rc8 19.Qb3 Qa5 20.Qc3 Qb5 21.e3 Na5 22.Qe5 Qd3 23.Rd1 Nb3 24.Bf1 Qc2 25.Nc3 Rc3! 26.dc3 Qd1 A pinning theme 27.Kg2 Bh3! 28.Kh3 Qf1 29.Kh4 Threatening mate... how? 29...h6 30.Qf5 g5 (30...g5 31.Qg5 hg5 32.Kg5 Qf2 33.h3 Ne4 34.Kg4 Qg3 35.Kf5 Qg5 0–1. vpccosta (2165) – pierred (2605), net–chess.com, 2008.

4.g3 e6 5.c3 c5 6.bc5 Bc5=.

4.Bb2 Bd7

5.Ra1 Nc6 6.c3 (6.b5 Nb8 7.e3 c6+=) 6...Nf6 7.e3 g6 (7...a5 8.b5 Na7 9.Ra5=) 8.Nf3 Bg7 9.d4 (9.Ba6 Rb8+=) 9...Ne4 (9...a5 10.b5 Na7 11.Ra5=) 10.Bd3 f5 (10...a5 11.b5 Nb8 12.c4+=) 11.Nbd2 e6 12.Qc2 0–0 13.0–0 (worse is 13.Ne4 fe4 14.Be4 de4 15.Qe4 a5–/+) 13...Kh8 14.Ba3 (worse is 14.Ne4 fe4 15.Be4 de4 16.Qe4 Rb8–/+) 14...a5 (14...Ne7 15.c4+/– (worse is 15.Ne4 fe4 16.Be4 de4–/+)) 15.b5 (15.ba5 Re8 16.a6 e5+–) 15...Nd2 16.Nd2 (16.bc6?! Nf3 17.gf3 Qg5 18.Kh1 Bc6 19.Bf8 Bf8=) 16...Na7?? (better is 16...Ne7+/–) 17.Bf8+– Bf8 18.Ra5 c5 19.Rfa1 c4 20.Bc4 dc4 21.Ra7 Ra7 22.Ra7 Bb5 23.Qa2 Bd7 24.Nc4 Bc6 25.Ne5 Bd5 26.c4 Be4 27.f3 (27.f3 Qb6 28.fe4+–) 1–0. Fournier,Frederic – Cadet,Yves, Active Game Noyon FRA, 1995.

5.Ra1 e6 6.e3 Bb4 7.Bg7 Bd2 8.Nd2+–.

5.Ra2 c6 6.e3 (6.Bd4 Nf6+=) 6...Qc7 (6...Nf6 7.Be5=) 7.Nf3 (7.c4 Qb7+=) 7...f6= 8.Be2 e5 9.c3 Bd6 10.c4 (better 10.d3=) 10...Ne7?? (better 10...e4 11.Nd4 Bb4=) 11.c5+– Nf5 1–0. DEFFM – goscha, freechess.org, 2017.

5.Ra2 Nf6 6.e3=.

5.Ra5 Nc6 6.Rd5 Nb4 7.Ra5=.

5.Ra5 Nc6 6.Rd5 Nf6 7.Bf6 gf6 8.b5 Na5 9.e3 e6 10.Rd4 Bc5 11.Ra4 c6 12.c4 cb5 13.cb5 Rb8 14.Nc3 a6 15.Qb1 0–0 (15...ab5 16.Nb5 Qb6 17.Qa1 Bb5 18.Bb5 Qb5 19.Ra5=) 16.Ra2 (16.Qa1 Bb6 17.Rg4 Kh8 18.ba6+–) 16...Qc7? (16...ab5 17.d4 (worse is 17.Bb5 Bb5 18.Nb5 Qd5–/+; worse is 17.Nb5 Bb5 18.Bb5 Qd5–/+) 17...Be7 18.Ne4= (18.Bb5? Bb5 19.Nb5 Qd5 20.Ra5 Qg2–+)) 17.Rb2?? (17.Qa1!? Nb7 18.ba6 Nd6+–) 17...Rb7? (17...Ba3 18.Rc2 ab5 19.Nb5 Qe5=) 18.Bd3 f5 19.ba6 Rb2 20.Qb2 Rb8 21.Qc2 Bb4 22.Nge2 Bc3 23.Nc3 Rb6 24.0–0 Nb3 25.Rb1 Qb8? 26.Bc4 Nc5 27.Ra1 Bc8 28.a7 Qa8 29.Nb5 Rc6 30.Be2 Ne4 31.Qc6! Qc6 32.a8Q Qa8 33.Ra8 Nd2 34.Rc8 Kg7 35.Rc7 1–0. cmulligan (2235) – pwillows (2110), net–chess.com, 2011.

5.Ra5 e6=+ 6.Ra1 (6.Ra3 A) 6...Bb4? 7.Bg7 Ba3 8.Na3+– (< 8.Bh8 Bd6=); B) 6...Nf6 7.Rb3 Bd6=+) 6...Nf6 (6...Bb4? 7.Bg7 e5 8.Bh8+–) 7.c3 Bd6 8.Nf3 0–0 9.e3 e5 10.Be2 e4 11.Nd4 c5 (11...c6 12.f3=+) 12.bc5= Bc5 13.0–0 Qc7 (13...a5 14.Ba3 Ba3 15.Na3=) 14.c4 (14.Ba3 a5=) 14...Qe5 (14...dc4 15.Na3 Bd6 16.h3 Ba3 17.Ra3–/+) 15.cd5 (15.Qc2 dc4 16.Bc4 Bd6=) 15...Bd6=+ 16.Ra2?? (better is 16.g3=+) 16…Qh2 0–1. bby – framer, Live Game Caissa's Web, 2004.

5.Ra1 Nf6

6.e3 e6

7.b5 c6 8.Bf6 Qf6 9.b6?? Qa1 10.b7 Qb1 11.ba8Q Qd1 12.Kd1 Bd6+–.

7.b5 c6 8.Bf6 Qf6 9.b6?? Qa1 10.b7 Qb1 11.Qb1 Bc5+–.

7.b5 c6 8.Bf6 Qf6 9.Nc3 Bd6=.

4.Nc3 e5

5.e4 d4 6.Nb5 Nc6 7.Ba3? a6 8.Bb2 Bb7 –/+.

5.e4 d4 6.Nb5 Nc6 7.Ba3? a6 8.Bb2 Rb8 9.Na3 Rb4 10.Rb4 Bb4 11.Bc4 –/+.

5.e4 d4 6.Nb5 Nc6 7.c3 Nf6=.

4.e3 Bd7

5.Ra1 e5 6.Bb2 Bd6 (6...e4 7.b5=) 7.Nf3 c6? (better is 7...Qe7!?=) 8.Be5+/– Be5 9.Ne5 Qf6 (better is 9...Bf5 10.b5 Ne7) 10.Nd7?? (10.d4 Qe7 11.c3 Bf5+–) 10...Nd7?? (better is 10...Qa1 11.Nc5 Nf6=+) 11.d4+/– c5 (11...Qe6!?) 12.bc5 (12.Ra6 Qg5 13.dc5 Ngf6+–) 12...Nc5 13.Bb5 Kf8 14.Nc3 (14.Qh5 Ne4 15.f3 Ng5+–) 14...Ne4 (14...Ne7 15.Qh5 Ne4 16.Ne4 de4 17.Ra6+–) 15.Ne4 de4 16.0–0 a6 17.Be2 Nh6 18.f3 ef3 19.Bf3 Ra7 20.e4 g6 21.c4 Kg7 22.e5 Qb6 23.Kh1 Rd8 24.d5+– Qc5 25.Qd3 Re8 26.Rfe1 Qc7 27.Qd4 Kg8 28.d6 Qd7 29.c5 Nf5 30.Qc3 Qb5 31.c6 a5 32.d7 Rf8 33.Rab1 Qa4 34.Re4 Qa2 35.Ra1 Qf2 36.c7 Ne7 37.d8Q Rd8 38.cd8Q Kg7 39.e6 f6 40.Qdd4 Qd4+– 41.Qd4 Rc7 42.Qd6 Ra7 43.Rc4 Nf5 44.Rc7 Rc7 45.Qc7 Kh6 46.Ra5 Nd4 47.e7 Nf3 48.gf3 f5 49.e8Q f4 50.Qf8 1–0. Fredek (2065) – Guest132218, Freundschaftspartie, 5m + 0s, 2006.

5.b5 a6 6.Nc3 Nf6 7.Nf3 c5 8.Be2 Qc7 9.0–0 (9.d4 e6=) 9...e6 (9...e5!?+=) 10.Bb2 Bd6 11.Qa1 (11.Ra2 e5 12.ba6 c4+=) 11...0–0 12.h3 (better is 12.Nd1 Ne8 13.c4+=) 12...Ne4?? (better is 12...e5=) 13.Ne4+– de4 14.Ng5 f6 (14...Be7 15.Ne4 f5 16.Ng3+–) 15.Ne4 Be7 16.Rb1 Be8 17.Bc3 Qd7 18.d4 (18.d4 cd4 19.ed4+–) 1–0. pierre – lkeg, internet, 2009.

5.b5 a6 6.Nc3 Nf6 7.Nf3 e6 (7...c6 8.ba6 Qb6 9.Ne5+=) 8.Bb2 Be7 9.Ne5 0–0 10.Be2 (10.Qf3 c5+=) 10...c6 11.ba6 Qb6 12.Qa1 c5 13.Nd7 Nfd7 14.0–0 c4 15.Rb1 Ra6 16.d3 (16.e4 Nf6+=) 16...Qa7 (16...Bf6!? 17.Ra6 Na6 18.dc4 Rb8+=) 17.dc4 Ra4 18.Na4 Nf6 19.cd5 ed5 20.Bd4 Qd7 21.Nb6 Qf5 22.Bd3 Ne4? (better is 22...Qe6+–) 23.f3 f6 (23...Nc6+–) 24.Qa2 Kh8 25.Qd5 Qd5 26.Nd5 (26...Nd2 27.Rd1 Nf3 28.gf3+–) 1–0. Trkn – guest2541, ICC, 2004.

5.b5 c6 6.c4 dc4=+ 7.bc6 Bc6 8.Rc4 e5 (8...e6 9.Qc2 Ne7 10.Ba3=) 9.Nf3 e4 (better 9...Bd6!?=) 10.Ne5+– Bb5?? (better 10...Ne7+–) 11.Re4+– Qd5 (11...Bf1 12.Qa4 Nd7 13.Nd7 Be7+–) 12.Nc3 (12.Nc3 Qe4 13.Bb5 Qc6 14.Qa4+–) 1–0. GuestWZNR – GuestMJJH, freechess.org, 2019.

5.b5 e5 6.c4 dc4 7.Bc4 Na6?? (better is 7...Nh6+=) 8.Ra6+– (8.ba6?! Rb8 9.Ra1 Nf6+–) 1–0. Fritz11 – anony, internet, 2013.

5.b5 e5 6.c4 c6 7.Nf3 Bd6 8.Bb2 Qe7 9.b6! a6 10.c5! Bc5 11.Be5 Bb6 12.Bg7 1–0. pcmvr (2845) – kinderchocolate (2235), net–chess.com, 2011.

5.b5 Nf6 6.Be2 c5 7.c4 Qb6 8.Nf3 h6 9.Nc3 Bg4 10.0–0 Nbd7 11.h3 d4 12.Nh2 Be2 13.Ne2 e6 14.d3 Bd6 15.ed4 Qb8 16.Nf3 g5?? 17.Ng3 Nb6 18.Ra6! Ke7 19.dc5 Bc5 20.Be3 Rd8 21.Bc5 Ke8 22.Qe2 Qc7 23.Bb6 ab6 24.Rfa1 Qb7 25.Nf5! Kf8 26.Nh6 Nd7 27.Ng5 Nc5 28.Ra8 Ra8 29.Ra8 Qa8 30.Qe5! Nd3?? 31.Qh8 1–0. Trkn – sanford, itsyourturn.com, 2000.

5.b5 Nf6 6.Nf3 e6 7.Ba3 Ba3 8.Na3 0–0 9.Bd3 c5 10.Ne5 Be8 11.Qf3 Nbd7 12.Nc6 Qc7 13.Qg3 Qg3 14.hg3 c4 15.Be2 Nc5 16.Ne7 Kh8 17.Rb4 Rb8 18.d3 cd3 19.cd3 Rb7 20.Nc8 Rc7 21.Nd6 Bd7 22.Rh2 Kg8 23.Rb1 Rb8 24.d4 Nce4 25.Ne4 Ne4 26.Bd3 Nc3 27.Bh7 Kf8 28.Rb3 Rbc8 29.Bd3+/– f5 30.g4 fg4 31.Rh8 Ke7 32.Rc8 Rc8 33.Kd2 Ne4 34.Be4 de4 35.Rc3 Rb8 36.Rc7 Ra8? 37.Nc4 Kd8 38.b6 ab6 39.Rd7! Kd7 40.Nb6 Kc7 41.Na8 Kb7 42.Nb6?? Kb6 43.Ke2 Kc6 44.g3 Kd5 45.Kd2 Kc4 46.Kd1 Kd3 47.Ke1 Kc2 48.Ke2 Kc1 49.Kf1 Kd1 50.Kg2 Ke1 51.Kg1 Ke2 52.Kg2 Kd3 53.Kh1 ½–½. pierredziel – pejton2004, Yahoo, 2005.

4.e3 e5

5.Bb2 Bd7 6.b5 c6 7.Be5 (7.b6 Qb6 8.Be5 c5 9.Ra2 Nc6 10.Nf3 Nb4 11.Ra1 Bf5 12.Na3=) 7...cb5 8.Rd4 Bc6 9.Nc3 a6 10.Nd5 Bd5 11.e4 Qe7 12.Rd5+=.

5.Bb2 Nd7 6.b5 (6.Nf3 A) 6...Qf6= 7.Nc3 (7.Be2 Bd6 8.b5 Ne7 9.0–0 0–0 10.Bd3 h6 11.Ra5 c6 12.bc6=; 7.b5 Bd6 8.d4 e4 9.Ne5 Nb6 10.Ra2 Qe6 11.Nd2 Ne7 12.c4+=; 7.c4 c6 8.cd5 cd5 9.Nc3 Qd6 10.Nb5 Qb8 11.Qc1 Kd8 12.Qa1+/–; 7.Na3 c6 8.b5 Bd6 9.Qa1 c5 10.Nb1 Ne7 11.Ra7 Ra7 12.Qa7= 0.25) 7...Nb6 8.Nb5 Bd6 9.Ra7 Ra7 10.Na7 Bg4 11.Bb5 Nd7 12.Nc6+/–; B) 6...e4 7.Ne5 Ne5 8.Be5 Bd7 9.b5 Ne7 10.Nc3 c6 11.Qh5 Qc8 12.Be2+=) 6...Ngf6 (6...Bd6 7.f4 Ngf6 8.fe5 Ne5 9.Nf3 Ned7 10.Be2 Nc5 11.Ra3 0–0 12.0–0=) 7.Nf3 (7.Be2 Bd6 8.Nf3 Nc5 9.Ra2 e4 10.Nd4 Bd7 11.Nc3 Ne6 12.Nf5+=) 7...Bd6 8.d4 (8.Be2 0–0 9.0–0 a6 10.Ra2 a5 11.Nc3 Bb7 12.Qa1=) 8...Qe7 (8...e4 9.Ne5 Nb6 10.Ra1= (10.Ra2 Be6 11.Be2 Nfd7 12.Nd7=) 10...Be6 11.Be2 Nfd7 12.Nd7=) 9.de5+= Ne5 10.Nbd2 (10.Ne5 Be5 11.Be5 Qe5 12.Bd3+=) 10...0–0 (10...Bg4 11.Be2 Ned7 12.Qa1+=) 11.Qa1 (11.Ne5 Be5 12.Be5+=) 11...Re8 (11...Nfd7 12.Ne5 Ne5 13.c4 dc4 14.Nc4 Nc4 15.Bc4+=; 11...Nf3 12.Nf3+=) 12.Ne5+/– Be5 13.Be5 Qe5 14.Qe5 Re5 15.Bd3 Bd7 16.Nf3 Ree8 17.Nd4 a6 18.Ra6 Ra6 19.ba6 c5 20.Nf3 (20.c3 cd4 21.cd4 Rb8=) 20...c4 21.Be2 Ra8 22.0–0 Ra6 23.Rb1 g6 24.Nd4 Ne4 25.Bf3 (25.g4 Kf8=) 25...Nc3 (25...Nd2 26.Rd1 Nf3 27.gf3+=) 26.Rc1 (26.Rb8 Kg7 27.g4 g5=) 26...Ra2 27.Ne2 Ne2–/+ ½–½. Schulze,Harald (2135) – Pruesse,Horst (1925), Nuremberg–ch op, 2003.

5.d4 e4 6.Ba3 Bd7 7.b5 Ba3 8.Na3 Ne7 9.c4 c6 10.Qh5 cb5 11.Nb5 g6 (11...Bb5 12.cb5 Qc7 13.Qd1=) 12.Qe5 (12.Nd6!? Kf8 13.Qh6 Kg8 14.Qf4+=) 12...0–0= 13.cd5 Bb5 14.Bb5+= Qd5 15.Ne2 Qe5 16.de5 a6 17.Nc3 Nbc6 18.Ba6 Nb4 19.Rb4+– Ra6 20.Kd2 Nc6 21.Re4 Rd8 22.Ke2 Ra3 23.Rc1 (23...Rb3 24.Na4+–) 1–0. Trkn – LatvianGambit87, ICC, 2004.

5.Nf3 e4 6.Nd4 (6.Ne5 Ne7 7.Qh5 g6=) 6...Bd7 7.b5 Nf6 8.Nc3 (8.Bb2 Be7=) 8...c5 9.bc6 Nc6 (worse is 9...Bc6 10.Nc6 Nc6 11.f3+=) 10.Nc6 Bc6 11.Ra6 Bd7 (11...Bb7 12.Bb5 Nd7 13.Ra1=) 12.Bb2 Be7 (12...Qb8 13.Qa1 Qb7 14.Rf6+=) 13.Qa1 0–0 14.Be2 (14.Ra7 Ra7 15.Qa7 Qb8=) 14...Qb8 (14...Qc7 15.0–0=) 15.0–0 Rd8 (15...Re8 16.Ba3 Ba3 17.Qa3=) 16.Ba3 (16.Rb1 Bd6+=) 16...Ba3 17.Qa3 Bc8 (17...Bg4 18.Rb1 Qc7 19.Bb5=) 18.Rb1 (18.Ra4 Qd6=) 18...Qc7 19.Ra5 a6 (19...Bg4 20.Ba6 Rdb8 21.Rb8 Rb8 22.Bf1+=) 20.Rc5 (20.Ba6 Ng4 21.g3 Ne5 22.Nd5 Rd5 23.Rd5 Nf3 24.Kg2 Ba6+–) 20...Qd6 21.Qa5 Now all is on d5 21...Be6 22.Rb6 Increasing the pressure on the isolated pawn on a6 22...Qe7 23.Rb4 Qd6= 24.Rc7 h6 25.h4 Bg4= 26.Bf1 Bd7 27.g3 Bb5 28.Bh3 Bc6 29.Bf5? Ne8–/+ 30.Rc6 Qc6 31.Rb6 Qc7 32.Nd5 Qc2 33.Ne7 Kf8 34.Qb4 The mate threat is Ng6 34...Qd1 35.Kh2 Nf6 36.Nd5 Kg8 37.Nf6 gf6 38.Qe4 (38.Qe4 Qd2 39.Qf4+–; 38.Be4 Ra7 39.d3 Qa1+/–) 1–0. pcmvr (2775) – pierred (2605), net–chess.com, 2008.

3.Ra4 d6

4.b5 Bd7 5.e3 a6 6.c4 c6 7.Nc3 cb5 8.cb5 Qb6 9.Qb3 Nc6? 10.Nd5 Qb8 (10...Qb7 11.Qc3 Rc8 12.bc6 Rc6 13.Rc4+–) 11.Qc3 ab5 (11...Ne5 12.Nc7 Kd8 13.Na8 Qa8+–) 12.Ra8 Qa8 13.Nc7 Kd8 14.Na8 (14.Na8 b4 15.Qa1+–) 1–0. Pierre – Mascarone, internet, 2020.

4.b5 Bd7 5.e3 c6 6.c4 cb5 7.cb5 Qb6 8.Nc3 g6 9.Bb2 Bg7 10.Qb3 Bc3? 11.Bc3 (11.dc3?! Nf6 12.c4 Bf5+–; 11.Qc3?! Nf6+–) 11...Nf6 12.Bf6 ef6 13.Re4 Kf8 14.Qd5 Qa5 (14...Kg7 15.Re7 Rf8+–) 15.Bc4 Be6 16.Qa8 Qa1 (16...Bc4 17.Rc4 Qb5 18.Rc7+–) 17.Ke2 Bc4 (17...Ke7 18.b6! d5 19.Qb7 Nd7 20.Re6 fe6 21.Bb5+–) 18.Rc4 Kg7 19.Rc7 Qa5 (19...Rf8 20.Qa7 Qb2 21.Rb7+–) 20.Qb7 Rf8 (20...a6 21.Rf7 Kh6 22.Nf3 Qb5 23.Qb5 ab5 24.Rb1+–) 21.Nf3 a6 (21...Kh6 22.Nd4 Qb6 23.Qa7 Qa7 24.Ra7+–) 22.Nd4 ab5 23.Rf7! Rf7 24.Ne6 Kh6 25.Qf7 Nc6 (25...Qa7 26.Qa7 Nc6 27.Qg7 Kh5 28.Qh7 Kg4 29.Qh3) 26.Qg7 Kh5 27.Qh7 Kg4 28.Qh3 1–0. Leonco – Gamma, internet corr, 2018.

4.d4 c5 5.bc5 dc5 6.dc5 Qd1 7.Kd1 e6 8.Be3 Nf6 9.Nc3 Nbd7 Exerts pressure on the isolated pawn 10.c6 Nb6?? (better is 10...Ne5 11.c7 Neg4+=) 11.Bb6+– 1–0. Wolf,Achim (1900) – Lotter,Christian (2140), remoteschach.de, 2005.

4.d4 Bd7!? 5.Ra1 Nf6=.

4.e3 Bd7 5.Ra3 Nf6 6.d3 e5 7.Qf3 (better 7.c4=) 7...Be7?? (better 7...d5 8.c3 c5 9.bc5 Bc5–/+) 8.Qa8+– a6 9.Qa7 0–0 10.Rc3 (10.c3!? Bb5 11.c4 Bd7+–) 10...d5 11.Rc7 (11.Qc7?! Bb4 12.Nd2 Bc3 13.Qc3 Nc6+–) 11...Bb4 12.Bd2 Bd6 13.Rb7 Nc6 (13...Qc8 14.Rb2 Bb5 15.Qb6+–) 14.Qa6 Bc8 (14...Qe7 15.Qa1+–) 15.Qc6 Bb7 16.Qb5 (better 16.Qb7 Qb8 17.Qb8 Rb8 18.Nc3+–) 16...Qc7 17.c3 (17.c4 Rb8 18.Ba5 Qc8+–) 17...Bc6 (17...Rb8 18.Qb2 Ba6+–) 18.Qb3?? (better 18.Qb2+–) 18...Rb8= 19.Qa2 Ra8 20.Qb3 Ba4 21.Qb2 Rb8 (better 21...Qb8 22.Qb8 Rb8= (22...Bb8? 23.Na3+–)) 22.Qa2+– Bd7? (22...Bb3 23.Qa1 Bc2=) 23.Nf3 (23.c4 d4 24.ed4 Qb7+–) 23...Rb6 (better 23...Qb6 24.Na3 Qa7+–) 24.d4?? (better 24.c4+–) 24...e4 25.Ng5 (25.Ne5 Qb7 26.Na3+=) 25...h6 (25...Qb7 26.Na3 Rb2–/+) 26.Qa8?? (26.Nf7 Kf7 27.Bc1+=) 26...Bf8 (26...Qb8 27.Qb8 Rb8 28.Nf7 Rb1 29.Bc1 Kf7 30.Kd2–+) 27.Na3? (27.Qa1 Qb7 28.Na3 Ba3 29.Qa3–+) 27...g6?? (better 27...Bc6 28.Qa5 Rb1 (28...hg5?! 29.Bc1=+) 29.Nb1 Qa5 30.Ne4 Ne4–+) 28.Nh3?? (28.c4 Rb8 29.Qa6 Ba3 30.Qa3 Rb1 31.Bc1 hg5 32.Be2+=) 28...Qd6?? (28...Rb3 29.Nf4 Ra3 30.Nd5 Nd5 31.Qd5–+) 29.Ke2?? (better 29.Bc1 Rb8 30.Qa7+–) 29...Rb8 30.Qa5 (30.Qa7 Rb2 31.f4 Qa3 32.Qa3 Ba3–+) 30...Rb2 31.Nf4 (31.Nc2 Bh3 32.gh3 Rc2–/+) 31...Ra2 (better 31...Qa3 32.Qa3 Ba3–+) 32.g3?? (better 32.Nc4! Ra5 33.Nd6 Bd6 34.f3–/+) 32...Ra3–+ 33.Qc5 (33.Qa3 Bg4 34.Ke1 Qa3 35.Ne2 Qa1 36.Nc1–+) 33...Qc5 (better 33...Qa6 34.c4 Bc5–+) 34.dc5 Bc6 (better 34...Bg4 35.Ke1 Ra1 36.Bc1 Bf3–+) 35.Bc1 Rc3 36.Bd2 (36.Kd2 Rb3 37.Kc2 Ba4–+) 36...Rc5 37.h4 (37.Ke1 Rc2–+) 37...Bb5 (37...Rc2!? 38.Ke1–+) 38.Ke1 Bf1 39.Kf1 Rc2 40.Ke2 Ng4 (40...Bb4 41.Rd1–+) 41.Kd1 (41.Rd1!?–/+) 41...Ra2 42.Ke2 (42.Rf1 Nh2 43.Re1 Nf3–+) 42...Bb4 (42...Nf2!? 43.Rb1 Bd6 44.Kf2 Rd2 45.Ke1–+) 43.Rd1 Bd2 (43...Nf6 44.Ke1 Rd2 45.Rd2–+) 44.Rd2–/+ Ra5 (44...Rd2 45.Kd2 Nf2 46.Ke2–+) 45.f3 (better 45.Nd5!? f5 46.f3 ef3 47.Kf3=) 45...ef3 46.Kf3 Nf6 47.Kg2 (47.Rc2 g5 48.Ne2 Ne4–/+) 47...g5–+ 48.hg5 hg5 49.Nd3 Kg7 (49...Ne4 50.Re2–+) 50.Nb4–/+ Rb5 51.Nc6 Rb1 (51...Ne4 52.Nd4 Ra5 53.Rb2–+) 52.Ne7–/+ Re1 (52...Rb7 53.Nd5 Rd7 54.e4 Ne4 55.Rd4–/+) 53.Nf5 (53.Rd4!?=+) 53...Kg6 54.Kf2 Rh1 55.Kg2 Ra1 (55...Kf5?! 56.Kh1 Ke4 57.Rf2=) 56.Ne7 Kg7 57.Nd5 Nd5 (better 57...Ne4!? 58.Rc2 g4=+) 58.Rd5= Kg6 59.Rd8 Re1 60.Kf2 Rh1 61.e4 Rh7 62.g4 f6 63.Rd6 Rh4 64.e5 Rg4 65.Rf6 Kg7 66.Kf3 Ra4 67.Rf5 Kg6 68.Rf8 Ra5 69.e6 Re5 70.Re8 Kf6 71.Rh8 Re6 72.Rh6 Kf5 73.Rh5?? (better 73.Re6!? Ke6 74.Kg4=) 73...Kg6 (73...Rc6!? 74.Rh8–+) 74.Rh1 Kf5 75.Rg1 (75.Rh5 Rb6–+) 75...Re4 Black intends g4 (75...Ra6 76.Rb1–/+) 76.Kg3 (better 76.Rg5! Kg5 77.Ke4=) 76...Rg4–+ 77.Kf2 Rg1 (better 77...Rc4–+) 78.Kg1= Kf4 79.Kg2?? (79.Kf2 g4=) 79...g4 (79...Kg4 80.Kh2 Kf3 81.Kg1–+) 80.Kg1?? (better 80.Kf2=) 80...Kf3 81.Kh2 Kf2 82.Kh1 Kf3 83.Kg1?? (83.Kh2 Kf2 84.Kh1 Kg3–+) 83...g3 (better 83...Kg3–+) 84.Kf1 Kg4 85.Kg2 Kh4 86.Kg1 Kh3 87.Kh1 Kg4 88.Kg2 Kf4 89.Kg1 Kf3 90.Kf1 g2 91.Kg1 Kg3 ½–½. venaverme – glenngilbert, gameknot.com, 2018.

4.e4+= Bd7 5.b5 a6 6.d4 c6 (6...Nf6 7.e5 Nd5 8.Ra1+=) 7.c4 (7.ba6 Na6 8.Nd2 Qb6+=) 7...cb5 (7...Nf6 8.Nc3+=) 8.cb5 a5 (8...Nf6!? 9.Nc3 e6+=) 9.Bc4 Qb6? (9...Nf6 10.e5 d5 11.Bd3+/– (worse is 11.ef6 dc4 12.fg7 Bg7+=)) 10.Nc3 (10.Bf7 Kf7 11.Qh5 g6 12.Qd5 Kg7 13.Qa8 Bb5+/–) 10...Nf6 (better is 10...e6!?+/–) 11.e5+– de5 (better is 11...d5 12.Bd3 Qe6+–) 12.de5 Ng8 (12...Ng4 13.Qf3 Qf2 14.Qf2 Nf2 15.Kf2 e6+–) 13.Qd5 Ra7 (13...e6 14.Qa8 Bc5+–) 14.Qf7 Kd8 15.Qf8 Kc7 16.Nd5 Kb7 Black threatens to counter with Qe6 17.Nb6 (17.Nb6 e6 18.Bd3+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

4.e4+= Bd7 5.b5 c6 6.Nc3+=.

4.e4 Bd7 5.b5 e5 6.Nf3 Bg4 (6...c6 7.Nc3+=) 7.h3+/– Bh5 8.Be2 Nd7 9.d4 c6 (9...ed4 10.0–0+/–) 10.bc6 Nb6 11.Ra5 Qc8 (11...Bf3!? 12.Bf3 ed4 13.Qd4 Ne7+/–) 12.Nbd2+– Qc6?? (better is 12...Bf3 13.Nf3 ed4+–) 13.Bb5 Qb5 14.Rb5 ed4 15.Rh5 Nf6 16.Ra5 Be7 17.Nd4 0–0 18.Nf5 Bd8 19.Bb2 Nbd7 20.Rb5 Bb6 21.Nc4 Bc5 22.Ncd6 Bd6 23.Qd6 Rfd8 24.Qg3 g6 25.Ne7 Kg7 26.Qd6 Re8 27.Qd7 Rad8 28.Qc7 Kf8 29.Bf6 Ra8 30.Rb7 a5 31.Ng6! (31.Ng6 fg6 32.Qf7 1–0. pierre – G_brain16, internet, 2008.

4.e4+= Nf6 5.Nc3+=.

3.Ra4 e5

4.Bb2 c5 5.bc5+= Bc5 (5...Nc6 6.Ba3+=) 6.Be5+– Nf6 7.e3 Nc6 (7...d6 8.Bb5 Nbd7 9.Bf6 Qf6 10.d4+–) 8.d4 Bb4 9.c3 Ba5 (9...Be7 10.Nf3+–) 10.Bb5 (10.Qf3 Qb6 11.Bd3 Ne5 12.de5 Bb7+–) 10...Bc7 (10...Bb7 11.Ne2 Bc7 12.Bc7 Qc7 13.0–0+–) 11.Nf3 (11.Qf3 Bb7 12.Bf6 Qf6 13.Qf6 gf6+–) 11...Ne5 (11...Bb7!?+–) 12.de5+– (12.Ne5?! Bb7+–) 12...Ng8 13.0–0 (13.Qd5 Rb8+–) 13...Ne7 14.Ng5 (14.Nbd2 Bb7+–) 14...Nc6 15.Nf7 (better 15.f4 Qe7 16.Bc4 Ne5 17.Bd5+–) 15...Kf7= 16.Qd5 Ke8 17.e6 (17.Bc6? dc6 18.Qd8 Kd8–+) 17...Ne7?? (17...Bb7 18.Rd1 Kf8+–) 18.Qa8 1–0. michaelbuss (2810) – RHINO62, ChessWorld.net, 2013.

4.Bb2 Nc6 5.b5+= Nd4 (5...Rb8 6.e4+=) 6.e3+– Nb5 7.Bb5 c6? (better 7...Rb8 8.Nc3 a6 9.Ba6 Rb2+=) 8.Bd3 Bd6 (8...d6 9.Ne2+–) 9.Nf3 (9.f4 Qh4 10.g3 Qh6 11.fe5 Be7+–) 9...Nf6 (9...f6 10.0–0+–) 10.Ne5 Be5 11.Be5 0–0 12.Rf4 Nh5 (12...Ne8+–) 13.Bh7! Kh7 14.Qh5 Kg8 15.Bg7! Kg7 (15...Kg7 16.Rg4 Mate attack) 16.Rg4 Kf6 17.Qg5 Ke6 18.Re4 Kd6 19.Qe5 1–0. Karl – Stefano, internet private, 2018.

4.Bb2 d6 5.b5 Bd7 6.e3 Nf6 7.c4 Be7 8.Nc3 (8.d4 ed4 9.Bd4 a6+=) 8...c6 9.d4 ed4 (9...a6 10.Qd3=) 10.Qd4+= c5 11.Qf4 Be6 12.Nh3 h6 (12...Nbd7 13.Ng5+=) 13.Qg3+– 0–0 14.Nf4 Nbd7 15.Ne6 fe6 16.Qh3 e5 (16...Kf7 17.Be2+–) 17.Bd3 Qe8 18.0–0 Qh5? (better 18...Nb6!? 19.Ra6 Qf7+–) 19.Qh5+– Nh5 20.Rfa1 Bd8 (20...Nhf6 21.Ra7 Ra7 22.Ra7+–) 21.Ra7 Ra7 22.Ra7 Nhf6 23.Ne4 Bb6 (23...Ne4 24.Be4 (24.Rd7?! Nf2 25.Be2 Ne4+–) 24...Nb6 25.Bc3+–) 24.Rb7 Ne4 25.Be4 (25.Rd7?! Nf2 26.Rd6 Ba5+–) 25...Nf6 26.Bf5 (26.Rb6?! Ne4 27.f4 Nd2 28.Rd6 Nc4 29.Be5 Nd6 30.Bd6 Rd8 31.Bc5 Rd5+=) 26...Ba5 27.b6 Nh7 (27...Re8 28.h4+–) 28.g4 Ng5 29.f4 Nf3 30.Kf2 Nh4 31.Be4 Re8 32.Kg3 (32.Bd5 Kh8+–) 32...Be1 (32...ef4 33.Kh4 (33.ef4?? Be1 34.Kh3 Re4 35.Rb8 Kf7 36.Rb7 Ke8–+) 33...g5 34.Kh5 Re4 35.Rg7 Kf8 36.b7+–) 33.Kh3 ef4 (33...h5+–) 34.Bd5 (34.Bd5 Kh8 35.Bg7 Kh7 36.Bc3 Re7 37.Re7 Kg6 38.Rg7) 1–0. marekt (2070) – tflk (1745), gameknot.com, 2014.

4.Bb2 d6 5.e3 Nf6 6.Nf3 Be7 7.Be2 0–0 8.0–0 Nbd7 9.c4 c5 10.bc5 Nc5 11.Ra2 1–0. pcmvr (2860) – drako (2755), net–chess.com, 2011.

4.Bb2 f6 5.e4 (black timed out) 1–0. chessxliv (2100) – ishawamatryer (2070), net–chess.com, 2014.

4.b5 c6 5.c4 Nf6 6.Bb2 Bd6 7.e3 0–0 8.Nf3 Re8 9.Nc3 e4 10.Ng5 Qc7 (10...h6 11.c5 Bc5 12.Nge4 Ne4 13.Ne4=) 11.Qb1 Pawn e4, live or die! 11...Bh2 (11...Bb7 12.c5 Be5 13.Bc4 (worse 13.Nge4 Ne4 14.Re4 cb5+–) 13...Bc3 14.Bf7 (worse 14.dc3 cb5 15.Bf7 Kh8 16.Be8 ba4=+; 14.Bc3 cb5 15.Bf7 Kf8 16.Be8 ba4 17.Bf6 Bd5 18.Bg7 Kg7 19.Qb2 Kg8+–) 14...Kf8 15.Bc3 (15.dc3?! cb5 16.Ba3 Re7=) 15...cb5 16.Be8 ba4 17.Bf6+–) 12.g3 (better 12.b6 Qb6 13.Rh2+–) 12...Ng4? (better 12...Bg3 13.Nge4 Ne4 14.Ne4 Be5+–) 13.Nge4 (13.Nce4?! Qd8+–) 13...f5 14.Ng5 (14.b6 Qb6 15.c5 Qd8+–) 14...g6 (14...Bg3 15.Qf5 Bf2 16.Ke2 Nf6+–) 15.Nf3?? (better 15.Be2 Qd8 16.Nf3+–) 15...Bg3=+ 16.fg3? (better 16.Nd1 Bf2 17.Nf2=+) 16...Qg3–+ 17.Ke2 Qf2 18.Kd3 Qf3 19.Be2 (19.Rg1 Re3! 20.Kc2–+) 19...Ne5 (better 19...Nf2 20.Kd4 Qh1 21.Qh1 Nh1–+) 20.Kc2=+ Qf2 21.Rf1 Qh4 (21...Qg3 22.Rg1 Qh4 23.c5=+) 22.c5 (22.Qa2 Qe7 23.Ra7 Ra7 24.Qa7 cb5 25.Qb8 bc4 26.Nd5+–) 22...Qf6 (better 22...Qe7!? 23.Qa2 Qe6=) 23.b6+– Na6 (23...a5 24.Ne4! Qe7 25.Qa2 Kf8+–) 24.Ba6+– Ba6 25.Ra6 Nc4? (25...d5 26.Qa2 Qf8+–) 26.Qa2 (26.Nd5 Qf8 27.Nf6 Kf7 28.Nd7 Qe7+–) 26...Qe6 (26...Qf7 27.Ra7 Ra7 28.Qa7+–) 27.b7 (better 27.Ra7!? Ra7 28.ba7 Ra8+–) 27...Rab8 28.Ra7 d6 29.Ra8 Kg7?? (29...d5 30.Qa7 Qe5 31.Bc1+–) 30.Nd5 (better 30.Ne4! Kf8 31.Nd6 Qd5 32.Nc4 Ke7+–) 30...Kf8 (30...Nb2 31.Qb2 Kf7+–) 31.Nc7 (better 31.Nf6 Red8 32.Rb8 Rb8 33.Qa8 Na3 34.Ba3 Qa2 35.Kd1 Qb1 36.Ke2 Qb5 37.d3 Qb7 38.Qb8 Qb8 39.Nd7 Ke7 40.Nb8 dc5 41.Bc5 Ke6 42.e4+–) 31...Ra8?? (31...Ne3 32.Kc1 Qa2 33.Ra2 Nf1 34.Ne8 Rb7 35.Nd6 Rb2 36.Rb2 h5+–) 32.Ne6+– (32.ba8B? Ne3 33.de3 Qa2 34.Ne8 Qc4 (34...Qa8?! 35.Nd6 Qa4 36.Kc1=; 34...Ke8?! 35.Bc6 Kd8 36.Rd1 Qc4 37.Bc3–/+) 35.Bc3 Qe2 (35...Ke8?! 36.Bc6 Kf8 37.Rd1–/+) 36.Kb3 Qb5 (36...Qf1?! 37.Nd6 Qd1 38.Kb4–+; 36...Ke8?! 37.Bc6 Kf8 38.Rh1–/+) 37.Kc2 Ke8–+; 32.Na8?? Ne3! 33.de3 Qa2–+; 32.ba8N Ne3! 33.de3 Qa2 34.Ne8 A) 34...Qa8?! A1) 35.cd6?? Qa4 (worse 35...Qe8 36.Rd1 Qd7 37.Bf6–+) 36.Kd2 Qa2–+; A2) 35.Nd6 Qa4 36.Kc1=; B) 34...Qc4 35.Bc3 Ke8–+) 32...Re6 33.Qa8 (33.Qa8 Re8 34.Ra1 Rb8 35.Qb8 Ke7 36.Qe8 Ke8 37.b8Q Kd7 38.Ra7 Ke6 39.Qg8) 1–0. AleksandrNekhoroshik (1635) – yarbalash, lichess.org, 2020.

4.c4 Bb7 5.Nc3 Nf6 6.Nf3 d6 (6...e4 7.Ng5=) 7.d4 e4 8.Nd2 Qe7 (8...e3 9.fe3 d5 10.Qc2+=) 9.e3+/– c6 10.Be2 d5 11.0–0 Nbd7 12.c5 Qe6 13.f3 Be7 (better is 13...ef3!? 14.Rf3 Be7+/–) 14.fe4+– de4 15.Bc4 Nd5 16.Nde4 0–0 17.Qf3 N7f6 (17...Qg6 18.Bd2+–) 18.Ng3 (18.Nf6 Bf6 19.b5 Rfd8+–) 18...Qd7 19.Bd2 a6 20.Nf5 Rae8 21.e4 Nc3 22.Bc3 h6 23.Qg3 (23.Qg3 Nh5 24.Qg4+–; 23.Ne7?! Qe7 24.e5 Nd5+–) 1–0. pierred (2540) – kode (2315), net–chess.com, 2007.

4.d4 ed4 5.Qd4 Nc6 6.Qe4 Qe7 7.Qe7 Be7 (< 7...Ke7 8.b5 Ne5 9.e4) 8.e3 (8.c3 Nf6=) 8...Bb7 (8...Nb4!? 9.Na3 Bb7–/+) 9.c3 a6 (9...a5 10.b5 Ne5 11.e4=) 10.Nf3 Nf6 11.Be2 0–0 12.0–0 h6 (12...a5 13.b5 Nd8 14.Ne5=) 13.Nd4 Nd4 14.ed4 Bc6 (14...Rfe8 15.Re1) 15.Ra6+/– Bb7 16.Ra8 Ra8 17.Be3 (17.Re1 Kf8) 17...Nd5 (17...Be4 18.Nd2) 18.Bf3+/– Ba6?? (better is 18...Ra2) 19.Bd5+– c6 20.Bf7 (better is 20.Bb3!? Bf1 21.Kf1+–) 20...Kf7+/– 21.Re1 d5 (21...Bd3 22.Nd2) 22.Nd2+– Kg8 23.Nf3 Bf6 24.Bd2 Bb5 25.g3 Kh7 26.Kg2 Rg8 27.Ne5 Ra8 28.Nd7 Ra2 29.Nf6 Kg6? 30.Bh6 gf6 31.Bf8 Ra3 32.Re3 Kf7 33.Bc5 Ba6 34.b5! Bb5 35.Ba3 Kg6 36.Be7 Kf7 37.Bc5 Kg6 38.Re8 Kf5 39.Rg8 Ke6 40.h4 Kf7 41.Rg4 Ke6 42.h5 f5 43.Rg5 Kf6 44.f4 Ba6 45.h6 Bc8 46.h7 Ba6 47.h8Q Ke6 48.Rg6 Kf7 49.Rf6 (49.Qg8) 1–0. tomy (2260) – iboyd (1950), net–chess.com, 2006.

4.e4 Bb7 5.b5 Be4?? (better is 5...a6 6.ba6 Na6=) 6.Re4+– Bc5 (6...d6 7.d4 Nf6 8.Re3+–) 7.Re5 Kf8 (7...Be7 8.Qg4 Kf8 9.Nc3+–) 8.Qf3 (8.Rc5 a6+–) 8...d6 (8...Bd4 9.Re2 c6 10.Ba3 d6 11.bc6+–) 9.Bc4 (9.Rc5 c6 10.Rc3 Ne7+–) 9...f6 (9...Nf6 10.Rc5! Nbd7 11.Rc7+–) 10.Rc5! dc5 (10...Nd7 11.Rc7 Ne5 12.Qe4+–) 11.Qa8 Ne7 12.Nf3 (12.Qa7 Nd7+–) 12...Nf5 (12...Nbc6 13.Qd8 (13.bc6?! Qa8 14.0–0 Nc6+–) 13...Nd8 14.d3+–) 13.0–0 h6 (13...Nd6 14.Na3+–) 14.Qd5 (better is 14.Ba3 g6+–) 14...Ne7 (14...Qd5 15.Bd5 Ne7+–) 15.Qd8 1–0. pierred – MCRH, Rated game, 1m + 0s, 2003.

4.e4 Nc6 5.b5 Nd4 6.Nf3 Qf6? 7.Nd4 ed4 8.Bb2 Bc5 9.d3 Qf4 10.Bd4 Bd4 11.Rd4 d5 12.Nc3 Nf6 13.Nd5 Nd5 14.Rd5 0–0 15.Be2 Bb7 16.Rf5 Qd6 17.0–0 Rae8 18.Bf3 g6 19.Rg5 f6 20.Rg3 Re5 21.d4 Rb5 22.Bh5 Kh8 23.Bg6 f5 24.Bf5 Qf4 25.Qh5 Qf2 26.Rf2 Rb1 27.Rf1 Rf1 28.Kf1 Ba6 29.Ke1 Rf5 30.Qe8 Rf8 31.Qf8 1–0. Trkn – Harry N., itsyourturn.com, 2001.

3.Ra4 e6

4.Bb2 Bb7 5.Nc3 Nf6 6.e3 (6.Nf3 c5 7.b5 a6 8.e3 Be7 9.Be2 ab5 10.Ra8 Ba8 11.Bb5=) 6...c5 7.b5 d5 8.Nf3 Bd6 9.Qa1 Qb6 10.Be2 e5 11.Nb1=.

4.Bb2 Bb7 5.e3 Nf6 6.Nf3 d6 (6...Nd5 7.b5=) 7.Nc3 Nbd7 8.Qa1 (8.Be2 Bf3 9.Bf3 d5+=) 8...d5 (8...Bf3 9.gf3 d5 10.Nb5+=) 9.b5 Bc5 10.Ba3 (10.d4 Bb6=) 10...Qe7 (10...Bb6 11.Be2+=) 11.Bc5 (11.Be2 0–0+=) 11...Qc5 12.Be2 0–0 13.0–0 (13.d4 Qb6+=) 13...e5 (13...Ne4 14.Ra3+=) 14.d4 Qd6 (14...ed4 15.Nd4 Qb6 16.Qa2+–) 15.de5 Ne5 16.Ra7 (16.Rd1 Rfe8+–) 16...Nf3 (16...Ne4 17.Ne4 Nf3 18.Bf3 de4 19.Be2+–) 17.Bf3+= Qc5 (17...Qb4 18.Ra8 (18.Rb7?? Ra1 19.Ra1 Qc3–+) 18...Ra8 19.Qe1+=) 18.Ra8+– Ra8 19.Qb2 Qa3 20.Qa3 Ra3 21.Ne2 Ra2 22.Nd4 Ne4 (22...Bc8 23.h3+–) 23.Be4 de4 24.f4 (24.Rd1 g5+–) 24...ef3 (24...Bd5 25.Kf2+–) 25.gf3 Kf8 (25...Bd5 26.Rb1+–) 26.f4 (26.Rd1!?+–) 26...Ke7 (26...Be4 27.Rc1+=) 27.Rd1 Kd6 (27...Be4 28.Kf2+=) 28.Nc6 (better 28.Nf5 Kc5 29.Rd7 Kb5 30.Rc7+–) 28...Ke6?? (better 28...Kc5 29.Rd7 Kb5 30.Nd4 Kb6 31.Rf7 c5+=) 29.Kf2 (better 29.Nd8 Kf5 30.Nb7 Rc2 31.Nd8+–) 29...Rc2 30.Kf3 Rc4 (30...Bc6 31.bc6 Rc6 32.Rd8–/+) 31.e4 f5?? (better 31...Rc3 32.Kg4 Bc6 33.bc6 Rc6 34.f5 Ke7–/+) 32.Nd8+– Kf6 33.Nb7 Re4 (33...Rc3 34.Ke2 fe4 35.Rd5+–) 34.Nc5 (better 34.Rc1!? Re7+–) 34...Rc4 (34...Rb4 35.Rd5 h6+–) 35.Ke3?? (35.Nd7 Ke7+–) 35...g5?? (35...Rc5 36.Rb1–/+) 36.Kd3 (better 36.Nd7 Kg7 37.fg5+–) 36...Rf4?? (better 36...Rc5 37.fg5 Kg5–/+) 37.Re1 (37.Na6 Rf3 38.Kd4 Rf2+–) 37...Rb4 (37...Rf3 38.Kd4 Rf4 39.Kd5 Rb4+–) 38.Kc3 (38.Re6 Kg7 39.Rc6 Rb5 40.Ne6 Kg8 41.Ng5 Rb3 42.Kd4 Rb2+–) 38...Rh4? (38...Rb5 39.Re6 Kf7 40.Rc6+=) 39.Nd7 (39.Re6!? Kf7 40.Rc6 Rh3 41.Nd3 Ke8 42.Rc7 Rh6+–) 39...Kg6 (39...Kf7 40.Re2 Rh3 41.Kb4 Rh6+–) 40.Kd3 (better 40.Re2 f4 41.Ne5 Kf6 42.Kd3+–) 40...Ra4? (40...Rh3!? 41.Kd4 Rh2 42.Ne5 Kf6+–) 41.Nc5 (41.Nf8 Kh5 42.Ne6 Ra3 43.Kd4 Ra2+–) 41...Rf4? (41...Rb4 42.Re6 Kh5+=) 42.Re4?? (better 42.Na6+–) 42...Rf1 (better 42...fe4 43.Ne4 Kf5–+) 43.Kd4 (43.Kd4 fe4 44.Ne4–+). FeegLood (2250) – wolfpacks (1630), lichess.org, 2017.

4.Bb2 d5 5.Na3 A) 5...a6 6.e3 (6.Nf3 Bd7 7.b5 f6 8.e3 Ra7 9.Be2 e5 10.0–0 Rb7 11.ba6=) 6...Bd7 7.b5 Nf6 8.Nf3 Be7 9.Ne5 0–0 10.Be2 Ne4 11.Nd7=; B) 5...Bd7 6.b5 c6 7.e3 Nf6 8.Bd4 c5 9.Be5 c4 10.d3 Ba3 11.Ra3 =.

4.Bb2 d5 5.Nc3 A) 5...Nf6 6.Nf3 (6.e3 c5 7.b5 Bd6 8.Qa1 Qb6 9.Nf3 0–0 10.Ra2 Nbd7 11.Be2=) 6...c5 7.b5 a6 8.e3 Qb6 9.Ra2 Bd6 10.Na4 Qb7 11.Bf6=; B) 5...c5 6.bc5 (6.b5 d4 7.Na2 Nd7 8.e3 Nb6 9.Ra3 Nf6 10.Nf3 Bd6 11.ed4=) 6...Bd7 7.Ra2 Bc5 8.Ne4 de4 9.Bg7 Bf2 10.Kf2 e3 11.de3+–; C) 5...Na6 6.Qa1 (6.Na2 Qd7 7.c3 c5 8.e3 Nc7 9.Nf3 Nf6 10.c4 dc4 11.Bf6+=) 6...d4 7.Ne4 f5 8.Ra6 Ba6 9.Qa6 fe4 10.Qe6 Ne7 11.Qe4+=; D) 5...Bd7 6.b5 c6 7.e3 Qb6 8.bc6 Bc6 9.Ra2 Nf6 10.Nf3 Bd6 11.Ne2=.

4.Bb2 d5 5.e3 Bd7 (5...Bd7 6.b5 c6= 7.Nc3 Qb6 8.bc6 Bc6 9.Ra2 Nf6 10.Nf3 Bd6 11.Qe2=; 5...Nf6 6.Bd4 (6.Nf3 c5 7.b5 Bd6 8.Be5 a6 9.Be2 Be5 10.Ne5 Nfd7 11.Nd7=) 6...Bd7 7.b5 a6 8.Nf3 c5 9.Be5 Be7 10.Nc3 0–0 11.Be2=). Olej,Emil(+) – Cane, corr 3GMM–57, 1995.

4.Bb2 Nf6 5.e3 d5=.

4.Bb2 Nf6 5.Nf3 (--> 2.Bb2 Nf6 3.a4 ba4 4.Nf3 e6 5.Ra4).

4.c3 Nf6 5.d4 (5.d3 c5 6.bc5 Bc5=) 5...d5 6.Bg5 Be7 (6...h6 7.Bf4=) 7.Nf3 (7.e3 Bd7 8.Ra3 Nc6+=) 7...Nbd7 (7...0–0 8.e3+=) 8.e3+= 0–0 9.Nbd2 (9.Bb5 Bb7+=) 9...h6 (better is 9...Bd6+=) 10.h4?? (10.Bf6 Bf6 11.Bb5 Nb6+=) 10...c6 (better is 10...hg5!? 11.hg5 Nh7–/+) 11.Ne5 (11.Bf4 Qb6+=) 11...Qc7 12.Nd7+= Bd7 13.Ra5 e5+= 14.de5 Qe5–/+ 15.Bf4? Qc3–+ 16.Qb1 Bb4 17.Ra2 Ne4 18.Rc2 Nd2 19.Qc1 Nb3 20.Rc3 Nc1 21.Kd2 Na2 22.Kc2 Nc3 23.Bd3 a5 24.Ra1 c5 25.Be5 a4 26.Bc3 Ra7 27.Bb4 cb4 28.Kd2 Rb8 29.Kc2 g6 30.f3 Kg7 31.g4 a3 32.e4 b3 Black prepares the advance a2 33.Kc3 de4 34.Be4 b2 35.Rb1 a2 36.Rb2 Rb2 37.Kb2 a1Q (37...a1Q 38.Kb3 Be6 39.Bd5 Bd5 40.Kc2 Ra2 41.Kd3 Qd1 42.Ke3 Qd2 0–1. grahamtrue (2110) – bromer (2260), net–chess.com, 2008.

3.Ra4 Nf6

4.Bb2 e6 5.b5 d5 6.e3 Be7 (6...Nbd7 7.Nf3+=) 7.Nf3 Nbd7 8.Be2 Bb7 9.d4 (9.Nc3 Nb6 10.Ra1 0–0+=) 9...0–0 10.0–0 c5 11.Nbd2 c4 12.Qa1 Qb6 13.Ba3 Ba3 14.Qa3 a6 15.ba6 Ra6 16.Ra6 Qa6 17.Qb2 Rb8 18.Qc3 Bc6 19.e4 (19.Ra1 Qc8=) 19...Nb6 (19...de4!? 20.Ne5 Ne5 21.de5 Nd5=+) 20.ed5 (20.Ne5 Na4 21.Qe3 Rb2 22.ed5 A) 22...Bd5? A1) 23.Bc4?! Bc4 24.Nec4 Nd5+– (24...Rc2?? 25.Qb3 Rc4 26.Nc4+–); A2) 23.Ndc4 Rb4 24.Qa3+–; B) 22...ed5 23.Ndc4 dc4 24.Bc4 Qa8 25.Bf7 Kh8+–) 20...ed5 21.Ne5 Nbd7 22.Ra1 Qb6 23.f4 g6 (23...Ne5 24.fe5 Ne8 25.Rb1=) 24.Bf3 Ne5 25.fe5 Nd7 26.Rb1 Qc7 27.Rb8 Qb8 28.Nf1 Nf8 29.Ne3 Qb7 30.Kf2 Ne6 31.g3 (31.Qd2 Qb2=) 31...h5 (31...Qa7 32.Bd5 Bd5 33.Nd5 Nd4 34.Nf6 Kg7 35.Qe3= (worse 35.Qc4 Nc2 36.Ke2 Qe3 37.Kd1 Qe5 38.Kc2 Qf6–/+)) 32.Qa1+= Qb6 33.c3 Qb3 (33...Qb7 34.Qd1+=) 34.Bd5 (34.Nd5 Qc2 35.Kg1=) 34...Bd5= 35.Nd5 Qc2 36.Kg1 Ng5 37.Qf1 Ne4 38.Qe1 (38.Qc4?? Qf2 39.Kh1 Ng5–+) 38...Ng5 39.Qf1 Ne4 40.Qe1 (40.Qc4?? Qf2 41.Kh1 Ng5 42.Nf6 Kg7–+) 40...Ng5 41.Qe3 Nh3 42.Kh1 Nf2 43.Kg1 Nh3 44.Kf1 Qh2 45.Nf6 Kg7 46.Ne8 Kf8 47.Nd6 Qh1 48.Ke2 Qg2 49.Ke1 Qh1 50.Kd2 Qg2 51.Qe2 Qg3 52.Qc4 Exerts pressure on the backward pawn 52...Qf4 53.Kc2 Ng5 54.Qc8 Kg7 55.Qa8 h4 56.Ne8 Kh6 57.Nf6 Qf5 58.Kb2 Nh7 59.Qh8 g5 60.Ng8 Kh5 61.Nf6 Kh6 62.Ng8 Kh5 63.d5 h3 64.Nf6 Kh6 65.Ng8 Kh5 66.Nf6 Kh6 67.Ng8 Kh5 68.Nf6 1–0. DEFFM – GuestBXKK, freechess.org, 2019.

4.Bb2 g6 5.b5 Bg7 6.Nc3 0–0 7.Qa1 a6 (7...d5 8.e3=) 8.e3 Bb7 9.Nf3 (worse is 9.ba6 Na6 10.Nf3 Nb4+=) 9...d6 (9...Qc8!?+=) 10.ba6+/– Ra6?? (better is 10...Bc6 11.Ra3 Bf3 12.gf3 d5+/–) 11.Ba6+– Ba6 12.Ra6 Na6 13.Qa6 Qd7 14.0–0 Rb8 15.Rb1 h6 16.Nd4 Kh7 17.h3 Rb6 18.Qa5 e6 19.d3 Rb7 20.Qa2 c5 21.Nf3 Qc8 22.Bc1 Qb8 23.Rb7 Qb7 24.Bd2 Nd7 25.Qa4 Nb6 26.Qb5 Qc7 27.Ne4 Nd5 (27...c4 28.Ba5 cd3 29.c3+– (29.Bb6?! dc2 30.Bc7 c1Q 31.Ne1 Qe1 32.Qf1 Qf1 33.Kf1 d5+–; 29.Qb6?? Qb6 30.Bb6 dc2–+)) 28.Ba5 Qe7 29.Qb8 Nf6 (29...Qf8 30.Bc7 f5 31.Nd6+–) 30.Qd6 Qd6 31.Nd6 Kg8 32.Ne5 Nd5 33.Ndf7 1–0. Janek – Bertie, internet, 2016.

4.b5 c6 5.c4 cb5 6.cb5 d5 7.e3 e5 8.Bb2 (8.d4 e4=) 8...Bd6 9.Nf3 Bb7 (better 9...Nbd7=+) 10.Be5+– 0–0 11.Bd4 (11.d4 a6+–) 11...Ne4 (11...a5 12.ba6 Na6 13.Nc3+–) 12.Nc3 f5 (12...a5 13.Qa1 f6 14.d3+–) 13.Be2 Qd7 (13...a5 14.Qa1 Nc5 15.Bc5 Bc5 16.Nd4+–) 14.0–0 Qf7 (14...Nc5 15.Bc5 Bc5 16.d4+–) 15.Ne4 (15.Qa1!? Nc5 16.Bc5 Bc5+–) 15...fe4+– 16.Ng5 (16.Ne5 Be5 17.Be5 Nd7+–) 16...Qf5 (16...Qe7 17.f4 h6 18.Nh3+–) 17.Nh3 (17.f4 Qg6+–) 17...Nd7 18.Bg4 Qf7 19.Bd7 (19.Ng5!? Qg6 20.Bd7 (20.Ba7 Ne5 21.h4 h6=; 20.Ra7?! Ra7 21.Ba7 Ne5=+) 20...Qg5 21.Qg4 Qg4 22.Bg4+–) 19...Qd7+= 20.Qh5 (better 20.Qa1+=) 20...Qb5?? (20...g6 21.Qe2 a6 22.Rb1=) 21.Rfa1 (21.Ng5 Qf1 22.Kf1 Ba6 23.Ra6 Rf2 24.Kf2 Rf8 25.Ke2 h6 26.Qg6 Rf2 27.Kf2 Bg3 28.Kg3 hg5 29.Qg7) 21...Bc6?? (better 21...Qc6=) 22.Ng5+– (22.Ra7?! Ra7 23.Ba7 Be8=) 22...h6 (22...Bh2 23.Kh2 Rf2 24.Ra7 Ra7 25.Ra7 Bb7 26.Qh7 Kf8 27.Qh8 Ke7 28.Rb7 Qb7 29.Qg7 Kd6 30.Ne4 de4 31.Qb7 Rf5+–) 23.Qg6 (23.Qg6 Rf6 24.Bf6 Bh2 25.Kh1 Qb1 26.Rb1 Ba4 27.Qg7; 23.Ra7? Ra7 24.Ba7 hg5–+) 1–0. AleksandrNekhoroshik (1745) – em_phD (1745), lichess.org, 2021.

4.b5 e6 5.Bb2 Bb7 6.c4 d5 7.e3 a6 8.Nf3 Nbd7 9.Nc3 (9.cd5!? Bd5 10.Ra6+/–) 9...dc4 10.Bc4 ab5 11.Ra8 Qa8 12.Nb5 Bd6 13.Nd6 cd6 14.0–0 Bf3 15.Qf3 Qf3 16.gf3 Ke7 17.d4 Rb8 18.Ba3 Rc8 19.Rc1 Nb6 20.Bb3 Rc1 21.Bc1 d5 22.Kg2 Ne8 23.e4 f6 24.Ba3 Kd7 25.Bc5 Nc4 26.Ba4 Kd8 27.ed5 ed5 28.f4 Nc7 29.Bc2 h6 30.Bg6 Ne6–/+ 31.f5? Nc5–+ 32.dc5 Kd7 33.Bf7 Kc6 34.Kg3 Kc5 35.f4 d4 36.Kf3 d3 37.h4 Kd4 38.Kf2 Kc3 39.Bc4 Kc4 40.Ke1 Kc3 41.Kd1 h5 42.Kc1 Kc4 43.Kd2 Kd4 44.Kd1 Ke3 45.Ke1 Kf4 46.Kd2 Ke4 (46...Ke4 47.Kd1 Kf5–+) 0–1. Rush,Bradley – Slavin,Pablo, RF–2011–0–00094, 2011.

4.Nf3 (--> 3.Nf3 Nf6 4.Ra4).

3.Bb2 Bb7

4.Nc3 e5 5.Ra4 Nf6=.

4.c4 a5 5.b5 e6 (5...Nf6 6.Ra4 e6 7.Nf3=) 6.e3 Nf6 7.Nf3 d5 8.Qa4 (8.Bd4 c5 9.bc6 Nc6 10.cd5 Nd4 11.Nd4 Bd5=) 8...Nbd7 9.Na3 (9.cd5 Bd5 10.Nc3 Bf3 11.gf3 Bb4=) 9...Bb4 (9...Nb6 10.Qc2 Ba3 11.Ra3 dc4 12.Bc4 Bf3 13.gf3=) 10.Be2 (10.Bd4 dc4 11.Nc4 Bf3 12.gf3 e5=) 10...0–0 (10...Nb6 11.Qc2 dc4 12.Nc4=+) 11.0–0= Nc5 12.Qc2 (12.Qd1 dc4 13.Nc4 c6=) 12...dc4 13.Qc4 Nfe4 (13...Bd5 14.Qc2=) 14.d3 Bd5 15.Qd4 Nf6 16.Qh4 Na4 17.Bf6 (17.Be5 Nc3 18.Bd1 c5=) 17...Qf6 18.Qf6 gf6 19.Nc2 (better is 19.Nb1!? Nc5 20.d4=+) 19...Nc3–/+ 20.Bd1 Bd6 21.e4 Bb3–/+ 22.Ne3 Nd1 23.Nd1 Rfb8 24.Nc3=+ a4 25.g3 a3 26.Rfc1 e5–/+ 27.Nd2 Be6 28.Nc4 Bb4 29.Na2 Rb5 30.Nb4=+ Rb4 31.Ra3 Ra3 32.Na3 Rb3 33.Nb1 Rd3–/+ 34.Kg2 Rb3 35.Nd2 Rb2 36.Nc4 Rb4 37.Nd2 Rd4 38.Nf1 Re4 39.Rc7 Bd5 40.Rc8 Kg7 41.Rc5 Rd4 42.f3 Rd3 43.Kf2 Bf3–+ 44.Ne3 Be4 45.g4 Rd2 46.Kg3 Re2 (47.Rc3 h5–+) 0–1. Lehr,Thomas – Haenjes,Frank, Schleswig Holstein–ch qual, 1997.

4.Nf3 Nf6 5.Nc3 e6 6.b5 Bc5 7.e3 a6 8.ba6 Na6 9.Ra4 Nb4 10.Ra8 Qa8 11.Bb5 0–0 12.0–0 c6 (12...Bf3!? 13.gf3 Rb8–/+) 13.Be2 d5 14.d4 Bd6 15.Qd2 c5 16.Nb5 Be7 17.dc5 Bc5 18.Bf6 gf6 19.Nfd4 e5 20.Nb3 Be7 21.e4 (21.Ra1!? Qc8 22.Ra4+=) 21...de4 22.Qe3 (better 22.Qd7!? Nd5 23.Qg4 Kh8 24.Ra1=+) 22...Nc2–/+ 23.Qg3 Kh8 24.f3? (24.Rc1!? Rg8 25.Qh3 e3–+) 24...Ne3 (24...Rg8!? 25.Qh3–+) 25.Ra1 Qc8 26.fe4 Bc5?? (better 26...Ng2 27.Na7 Qc2–+) 27.Rc1?? (better 27.Qf2 Rg8 28.g3 Be4 29.Bf1 Nf1 30.Nc5 Ng3 31.hg3 Rg3 32.Qg3 Qc5 33.Qf2 Qb5 34.Qf6 Kg8 35.Rd1 Qc5 36.Kf1 Bg2 37.Ke2 Qc2 38.Ke1 Qc3 39.Kf2 Qc2 40.Ke1 Qe4 41.Kf2 Qc2 42.Ke1=) 27…Nf5–+ (27...Nf5 28.Nc5 Ng3 29.hg3 Qc6–+) 0–1. AvImd (1780) – Carmuster (1805), lichess.org, 2020.

3.Bb2 Nc6

4.b5 Rb8 5.c4=.

4.c3=.

3.Bb2 e6

4.e3 Bb4?? 5.Bg7 Nc6 6.Bh8+–.

4.e3 Bb4?? 5.Bg7 Nf6 6.Bh8+–.

4.e3 Bb7=.

4.e3 Nf6 5.Ra4 Bb7=.

4.e3 Nf6 5.b5 Be7 6.Qf3 d5 7.c4 a6 8.Ra4 c6 9.bc6=.

4.e3 Nf6 5.b5 Be7 6.Qf3 d5 7.c4 Bb7 8.Nc3 Qc8 9.Qg3 (9.Ra4? d4 10.Qg3 dc3 11.Bc3 0–0–+) 9...0–0 10.Nf3 Bd6 11.Qh4 Nbd7 12.Na4 dc4 13.Bc4 Be4 14.Be2 Qb7 15.Nc3 Bg6 16.0–0 e5 17.d4 e4 18.Nd2 Rae8 (18...a6!?+=) 19.Nc4+/– Bb4 20.Na5 Qb6 (20...Ba5!? 21.Ra5 c5+/–) 21.Nc6+– Bc3 22.Bc3 Nd5 23.Bb2 Nb8 24.Ba3 Nc6 25.Bc5 Nd4 26.ed4 (worse is 26.Bd4 Qd6+/–) 26...Qb8 27.Bf8 Kf8 28.Qg5 f5 29.Qc1 Nb6 (29...Qb6 30.Rd1 e3 31.fe3 Ne3 32.Rd2+–) 30.Qa3 (30.Qc5 Re7+–) 30...Re7 31.Qa7 Qd8 32.Rfd1 f4 33.Ra3 Rd7 34.Rc3 Kg8 35.Rc6 f3 36.gf3 Qg5 37.Kh1 ef3 38.Bf3 Bh5 39.Qa2 Rf7 40.Bh5 Qh5 41.Qb3 Kh8 42.Rc5 Qg6 43.Qe3 h6 44.Rdc1 Qd6 45.Re5 Nd5 46.Qb3 Rd7 47.Re8 Kh7 48.Qd3 g6 49.Rc6 (49.Rc6 Qc6 50.bc6+–) 1–0. Cottarelli,Franco – Cane,Luisito, Italy Masters Ch–1, 1985.

4.e3 Nf6 5.b5 Be7 6.Qf3 d5 7.Qg3 0–0=.

4.e4 Bb4?? 5.Bg7 Qh4 6.Bh8 Qe4 7.Ne2+–.

4.e4 Nf6 5.e5 Nd5 6.c3 Bb7 7.Ra4 (7.Nf3 a5 8.b5 Be7=) 7...d6 (7...Nb6 8.Ra1+=) 8.Nf3= de5 (8...Nd7 9.d4=) 9.Ne5 Nf4 10.Qg4 (10.f3 Bd6 11.c4 Ng6 12.Ng6 hg6= (worse is 12...fg6 13.c5 Qh4 14.Ke2+/–)) 10...Qf6–/+ 11.c4 (11.d4 h5 12.Qg3 h4–/+) 11...Nc6 (11...Nd7 12.Nd7 Qb2 13.Nc3 Bb4 14.Rb4 Qb4 15.Qf4 Kd7 16.Qf7 Qe7 17.Qf4–+) 12.Bc3?? (12.Nc6 Qb2 13.Nc3 Qc1 14.Nd1 Bc6 15.b5–+) 12…Ne5–+ (12...Ne5 13.Qg3 Qf5–+) 0–1. kode (2325) – pcmvr (2775), net–chess.com, 2008.

3.b5 a6

4.Ra4 a5 5.e3 Nf6 6.Bb2 e6 7.Nf3 Bb4 8.Be2 d5 9.0–0 Nbd7 10.c3 (10.Ne5 Ne5 11.Be5 0–0=) 10...Bd6= 11.d4 Nb6 12.Ra2 Nc4 (12...0–0 13.Ba3=) 13.Bc4+= dc4 14.Na3 0–0 (14...Bd7 15.Qa4+=) 15.Nc4 Be7 (15...Bd7!? 16.Nd6 cd6+–) 16.Na5+– Bd7 17.Qd3 Qb8 (17...c6 18.bc6 Ra5 19.Ra5 Qa5 20.cd7+–) 18.c4 Bb4 19.Bc3 Bc3 20.Qc3 Ra7 21.Ne5 Qa8 (21...Qb6 22.Rb1 Qd6 23.Rba1+–) 22.Rfa1 Be8 23.Qb3 1–0. GuestKHDH – GuestTPBP, freechess.org, 2018.

4.Ra4 Bb7 5.ba6 Ba6 6.Nc3 c6 (6...Nf6 7.Nf3=) 7.Nf3+= Nf6 8.e3 (8.e4 e6+=) 8...e6= 9.Bd3 (9.e4 d5=) 9...Bb7 (9...Be7 10.Bb2=) 10.Ra8+= Ba8 11.Bb2 Qb6 (11...d5 12.0–0=) 12.Qa1+= Bb7 13.0–0 Bb4? (13...c5 14.e4 Be7 15.Rb1+=) 14.Ne4 (14.Na4 Qd8 15.Bf6 gf6+–) 14...Ne4+– 15.Bg7 Rg8 16.Be4 Bf8?? (better 16...Ba6 17.Rb1 f5 18.Bf5 ef5 19.Qe5 Kd8+–) 17.Bf8 Rf8 18.Rb1 (18.Bh7?! Qc7+–) 18...Qc7 (18...Qa6 19.Qb2 f5 20.Bd3+–) 19.Qb2 (19.Qa7!? Ke7 20.Rb7 Qd6+–) 19...d5 (19...f5 20.Bd3+–) 20.Bh7 c5 21.Qb7 Qb7 22.Rb7 Nd7 23.c4! Nf6 (23...dc4 24.Be4 Combination) 24.Ng5 dc4 25.Bc2 Nd5 (25...Kd8 26.Nf7 Kc8 27.Nd6 Kd8 28.f4+–) 26.Nh7 Rh8 27.Rb8 (27.Rb8 Ke7 28.Rh8+–) 1–0. DEFFM – GuestNXNK, freechess.org, 2018.

4.Ra4 Bb7 5.ba6!? Ra6 6.Ra6 Na6 7.Nf3=.

4.Ra4 Bb7 5.e3 ab5=+ 6.Ra8 Ba8 7.Nf3 c6 (7...b4 8.d4=+) 8.Bb2 g6?? (better 8...e6=+) 9.Bh8+– f6 10.Be2 (better 10.Nc3+–) 10...Nh6 11.c4 Kf7 (11...Qa5 12.0–0 Nf7 13.Bf6 ef6 14.d4+–) 12.cb5 Kg8 13.Qa4 Bb7 14.Qa7 Qc7 (14...Qc8 15.Bf6! ef6 16.b6+–) 15.b6 Qc8 16.Bf6! Na6 (16...ef6 17.h4 Combination) 17.Bc3 d5 18.Ng5 (18.h4 Nf7+–) 18...Nc5 (18...Nf5 19.0–0+–) 19.d4 Ne4 (19...Nd7 20.Ne6+–) 20.Ne4 de4 21.Bc4 e6 22.Be6! Qe6 23.Qb7 Qb3 (23...Qc4 24.Qa8 Qb3 25.0–0 Qb6 26.Nd2+–) 24.0–0 Ng4 (24...Nf5 25.Qc6 Ne7 26.Nd2 Nc6 27.Nb3+–) 25.Qc6 Nf2 26.d5 Nd3 27.Qe6 1–0. DEFFM – GuestQSGV, freechess.org, 2018.

3.b5 Bb7

4.Ra4 a6=.

4.c4 a6 5.Ra4 e5 6.Bb2=.

4.c4 Nf6 5.f3 (5.d4 a6=) 5...d6 (5...a6!?=+) 6.Ra4 a5 (6...e5 7.d4=) 7.g3 (7.d4!?=) 7...Nbd7=+ 8.Ra3 (8.Ra1 e6=+) 8...e5–/+ 9.e4 (9.Ra1 d5–/+) 9...Nc5 (9...d5!? 10.cd5 Ba3 11.Ba3 h5=+) 10.Nc3 (10.Bb2 Ne6=+) 10...Be7 11.h4 (11.Kf2 Ne6=+) 11...h6 (better is 11...0–0=+) 12.Nge2?? (12.d4 ed4 13.Qd4=+) 12...c6 13.bc6?? Bc6 14.Nd5?? a4?? 15.Nec3 Nb3 16.Na4?? Ba4?? 17.Rb3 Bb3 18.Qb3 0–0 19.Nf6 Bf6 20.Bh3 Rb8 21.Qe3 Rb1 22.0–0 g5 23.Bf5 Qa5 24.d3 Qc3 25.h5 Rc1?? 26.Rc1Qb4 27.g4 1–0. riverborne – cervantes, Live Game Caissa's Web, 2006.

4.e3 a6 5.c4 ab5 6.cb5 c6 7.Nf3 Nf6 8.Ra4 cb5 9.Bb5 Nc6 10.Ra8 (10.Ba3 g6=) 10...Qa8= 11.0–0 e6 12.Bb2 Be7 13.d4 0–0 14.Qe2 Rc8 15.Nc3 Nb4 16.Ra1 Qb8 17.Ne5 Nc6 18.f4 Ne5 19.de5 Ne4 20.Rc1 Nc3 21.Rc3 Rc3 22.Bc3 Bc6 23.Bd3 Qb3 24.Bd4 g6 25.h3 h5 26.Bc2 Qa2 27.Qd3 Qd5 28.e4 Qa5 29.Qe3 Qa2 30.Bd3 Qb3 31.Qd2 Bb4 32.Qe2 Qa3 33.Kh2 Qc1 34.Kg3 (34.g3 Bc5 35.Qb2 Qd1 36.Bc5 Qd3 37.Qb8 Kh7=) 34...Be1 (34...Bd2 35.Qf3=) 35.Kf3= h4 (35...Bd2 36.Be3 Be3 37.Qe3=) 36.Bb2+= Qd2 37.Qd2 Bd2 38.Bd4 g5 39.Be3 Be3 (39...Bc3 40.fg5 Be5 41.Bf2+=) 40.Ke3+– gf4 41.Kf4 Kg7 (41...Kf8!?+–) 42.Kg5+– Bb7 (42...Ba4 43.Kh4 f6 44.ef6 Kf6 45.g4+–) 43.Kh4 f6 (43...Kg6 44.Kg4+–) 44.ef6 Kf6 45.g4 e5 46.Bc2 d5? (better 46...Ba6!?+–) 47.g5+– Kg7? (47...Ke7 48.ed5 Bd5+–) 48.ed5 Bd5 49.Kg4 Be6 50.Bf5 Bb3 51.Kf3 Bd5 52.Ke3 Bg2 (52...Kg8+–) 53.h4 Bd5 54.h5 White prepares the advance g6 54...Bc6 (54...Kg8 55.h6 Kf7+–) 55.h6 Kh8 (55...Kf7 56.Kd3+–) 56.g6 Bd5 57.g7 Kg8 58.Kd3 Kf7 59.Bh7 Kf6 60.g8Q (60.Be4 Bg8 61.Kc3+–) 60...Bg8= 61.Bg8 e4 62.Ke4 Kg6 63.h7 Kg7 64.Kf5 Kh8 65.Kg5 Kg7 66.Kf5 Kh8 ½–½. DEFFM – GuestHQSS, freechess.org, 2017.

4.e3 c6 5.Nf3+= (worse 5.Ra4 cb5 6.Rf4 e6–/+) 5...Qa5 (5...Nf6 6.Nc3+=) 6.c4 (6.Nc3 Nf6+–) 6...Nf6 (6...cb5 7.cb5 d5 8.Ra4+=) 7.Ra4+– Qb6 8.Be2 (8.Nc3 cb5 9.Nb5 a6+–) 8...cb5+= 9.cb5 e6 10.Nc3 d5 11.0–0 Bd6 12.Qb3 (12.Ba3 Ba3 13.Ra3 Nbd7+=) 12...0–0 (12...Nbd7 13.d4+=) 13.Ba3 Ba3 14.Qa3 Nbd7 15.Ra1 Nc5 (15...Qc7 16.Ra5+–) 16.Ra7 Ra7 (16...Nfd7!? 17.Ra8 Ra8+–) 17.Qa7+– Qa7 18.Ra7 Ra8 (18...Rb8 19.d4 Ncd7 20.Na4+–) 19.b6 Nfd7 (19...Rb8 20.Bb5+–) 20.d4 Ra7 (20...Nb6 21.Ra8 (21.dc5?! Ra7 22.cb6 Ra1 23.Nd1 Ba6 24.Ba6 Ra6=) 21...Ba8 22.dc5+–) 21.ba7 Ne4 22.Nb5 (22.Ba6 Ba8 23.Nb5 Nb6+–) 22...Nb6 (22...Kf8 23.Ne5 Ne5 24.de5+–) 23.Ne5 f6 24.Nd3 g6 (24...Kf7 25.f3 Bc6 26.Nb4 Bb5 27.Bb5+–) 25.Nc5 (25.f3 Bc6 26.Nf4 Ng5+–) 25...Ba8 (25...Nc5 26.dc5 Nc8 27.Nd6 Nd6 28.cd6+–) 26.Ne6 f5 (26...Kf7 27.Nec7 Bc6 28.f3+–) 27.f3 Nf6 28.Nec7 (28.Nd6 Bc6+–) 28...Kf7 (28...Bc6 29.Nc3+–) 29.Kf2 (29.Na8 Na8 30.Nc3 Ke6+–) 29...h5 (29...Ke7 30.Na8 Na8 31.Nc3+–) 30.Kg3 Ke7 (30...Bc6 31.Kf4+–) 31.Kf4 (better 31.Na8 Na8 32.Kf4 Ne8+–) 31...Kd7 (31...Bc6+–) 32.Kg5 Ne8 33.Ne8 Ke8 34.Kg6 Bc6 (34...Kd7 35.Kh5 Kc6 36.Kg5+–) 35.Kf5 Bb5 (35...Kd7+–) 36.Bb5 Ke7 1–0. DEFFM – cubanochico, freechess.org, 2018.

3.c3 Bb7

4.Nf3 Nf6 5.d3 (5.Qa4 g6=) 5...g6= 6.e4 Bg7 7.Be2 0–0 8.0–0 d6 (8...a5 9.Ra4 d6 10.Qb3=) 9.Qa4 Nbd7 10.Qc2 c5 11.bc5 Nc5 12.Be3 Qc7 13.Nbd2 Rfc8 (13...a5 14.h3=) 14.Nd4 (14.Rfb1 Ne6+=) 14...a5 (14...d5 15.Nb5 Qd7 16.Na7+/–) 15.Nb5 (15.Rfb1 d5+=) 15...Qc6 (15...Qd7 16.Rfb1+=) 16.Rfb1+= Rcb8 17.Bf3 e5 (better is 17...Ra6!?+=) 18.Nc4+– Ne8 19.Na5 Qa6 (19...Qd7 20.d4 ed4 21.Nd4+/–) 20.c4 (20.d4 Bc8 21.dc5 Rb5+–) 20...Bc8 21.Nb3 Qb6 (21...Qc6 22.Ra8 Ra8 23.Nd6 Nd6 24.Nc5+–) 22.Ra8 Ra8 23.h3 Bd7 (23...Qc6 24.Nd6! Nd6 25.Nc5+–) 24.Nd6! (24.Nd6 Qd6 25.Nc5+–) 1–0. staatenlose (2005) – zd3nik (1900), gameknot.com, 2014.

4.Nf3 g6 5.Bb2=.

3.c3 d5

4.Nf3 e6 5.Qa4 Bd7 6.Qc2 a5 (6...c5 7.bc5 Bc5 8.d4=) 7.d4 (7.Ra5 Ra5 8.ba5 c5+=) 7...Nf6 (7...Nc6 8.ba5 Na5 9.e4=) 8.Nbd2 (8.ba5 c5 9.Bf4 Nc6+=) 8...Nc6 9.ba5 Ra5 10.Ra5 Na5 11.e4 c5 12.e5 Nh5 13.Nb1 g6 14.Be2 Qc7 15.Qd1 cd4 16.cd4 (16.Qd4?! Bc5 17.Qh4 Nc6=+) 16...Nb3 17.0–0 Nc1 18.Qc1 Qc1 19.Rc1 Nf4 20.Bf1 g5 21.h3 Be7 22.g3 Ng6 23.Nbd2 0–0 24.Rc7 Rd8 25.Bd3 Nf8 26.Rb7 Rc8 27.Kf1 Bd8 28.Nb3 Bc6 29.Ra7 Ra8 30.Ra8 Ba8 31.Bb5 Bb7 (31...h5 32.Nc5+=) 32.h4 gh4 33.Nc5 Bc8 34.Nh4 Bh4 35.gh4 Ng6 36.h5 Nf4 37.h6 f6 38.ef6 Kf7 39.Nd3 ½–½. Taulien,Hans_Juergen – Mehlhorn,Uwe, remoteschach.de, 2003.

3.c3 Nf6

4.Qa4 c6 5.Nf3 Qc7 6.d4 Nd5 (6...d5!?+=) 7.e4+/– Nb6 8.Qa5 a6 (8...d5 9.Bd3+/–) 9.c4 Qa7?? (better is 9...Ra7+/–) 10.c5+– d5 11.cb6 (11...Qb7 12.ed5 cd5 13.b5+–; 11.Qb6?! Qb6 12.cb6 de4+–) 1–0. Baumann,Heinz – Ritschel,Stephan, RSX9E – A00 – Sokolsky–1, 2002.

4.Qa4 e5 5.d3 c5 6.Nf3 cb4 7.cb4 Bd6 8.Nbd2=.

3.Nc3 e6

4.Ra4 c5 5.bc5+= Bb7 (5...Bc5 6.d4 Bb6 7.e4+=) 6.d4+– d5 (6...Bc6 7.Ra2+=) 7.Bf4 Nc6 (7...Bc6 8.Ra1+–) 8.Nf3 Nd4? (better 8...a6+–) 9.Qd4+– (9.Qd4 a6 10.Rb4+–; 9.Rd4?! Bc5 10.Ra4 Bc6+–) 1–0. pcmvr – ringo, net–chess.com, 2018.

4.Ra4 d5 5.e3=.

4.b5 Bb7 5.Ra4 Nf6 6.Nf3 Be7 7.d3 0–0 8.h4 Nd5 9.Nd5 Bd5 10.Rg4 (10.e4!? Bb7 11.Bg5=) 10...a6 11.e4 (11.Bh6 Bf6+=) 11...Bb7 (better is 11...f5!? 12.Rg3 fe4 13.de4 Be4–/+) 12.Bh6= g6 (12...Bb4 13.Ke2 A) 13...ab5? 14.Rg7 (14.Bg7?! f5 15.Rg3 Kf7+–) 14...Kh8 15.Ng5+–; B) 13...Bc3+/–) 13.Bf8+/– Bf8 14.h5 ab5 15.hg6 hg6 16.Qd2 (16.Qb1 c6 17.Rgh4 Qa5 18.Ke2+/–) 16...Bg7+= 17.Ke2 d5 18.e5 d4 19.Ng5 Nd7 20.Rh7 (better is 20.f4!?+=) 20...Ne5+= 21.Rgh4 c5?? (better is 21...Qf8+=) 22.Rg7!+– Kg7 23.Rh7 Kg8 24.Qf4 Qc7?? (better is 24...Qg5 25.Qg5 Kh7 26.Qe5 Rc8+–) 25.Ne6! Qd6 (25...fe6 26.Rc7 Pinning (26.Rc7 Deflection)) 26.Rg7 Kh8 27.Qh6 (27.Qh4) 1–0. pdchessvamp – retiponziani, ChessWorld.net, 2012.

3.c4 e6

4.Ra4 e5=.

4.Nc3 e5 5.Ra4 Bb7 6.Nf3 e4 7.Nd4 Nf6 8.e3 (8.d3 ed3 9.ed3 Nc6 10.Qe2 Qe7=) 8...Nc6 (8...c5 9.bc5 Bc5 10.Nb3=) 9.c5 Nd4 10.ed4 Be7 (10...d6 11.d3=) 11.d3 0–0 12.de4 Ne4 13.Ne4 Be4 14.f3 Bb7 15.Bc4 Bh4 16.g3 Re8 17.Be2?? (better is 17.Kf2=) 17...Bf3–+ 18.Ra2 (18.Ra3 Be2 19.Qe2 Re2 20.Ke2 Bg5–+) 18…Bh1 (18...Bh1 19.Kf1 Bd5–+) 0–1. bromer (2260) – pierred (2605), net–chess.com, 2008.

4.d4 e5+= Black gets strong initiative 5.c5 (5.Ra4 Nc6 6.Bd2 ed4+=) 5...ed4 (5...Nc6 6.Ra4 ed4 7.e3+=) 6.Qd4 Nc6 7.Qe4 (7.Qf4 d6+=) 7...Qe7–/+ 8.Qe7 (8.Qf4 a5 9.ba5 Ra5–/+) 8...Be7 (8...Nce7?! 9.Nc3=) 9.Bb2 (9.Ra4 Rb8–/+) 9...Nf6–+ (9...Nb4 10.Ra4 f6 11.Rb4 Bc5 12.Rb3+=) 10.Nc3 (10.Ra4 Rb8 11.Nd2–+) 10...Nb4 11.Na4? (11.Rc1–+) 11...Nc2 12.Kd2 Na1 13.Ba1 Ne4 14.Ke1 (14.Ke3 Nc5 15.Bg7–+) 14…Rb8 (14...Rb8 15.Nc3 Nc3 16.Bc3 Rb1 17.Kd2 Rf1–+) 0–1. alaamattar (2245) – pierred (2605), net–chess.com, 2008.

4.Nf3 Nc6

5.b5 ab5

3.c4 Bb7

4.Ra4 e6=.

4.e3 e5 5.Ra4 c5 6.bc5=.

4.e3 e6 5.b5 (5.Ra4 c5 6.bc5 Bc5+=) 5...Bb4 (5...a6 6.Ra4 Nf6 7.Ba3+=) 6.Nf3 (6.Ra4 Be7=) 6...c5 (6...Nf6 7.Ra4 Be7 8.d4=) 7.Be2 (7.Ra4 a6=) 7...Qf6 (7...a6 8.Bb2 Nf6 9.Ra4 (worse is 9.Qa4 ab5 10.Qb3 bc4 11.Qc4 Ra1 12.Ba1 0–0–/+) 9...ab5 10.Ra8 Ba8 11.cb5 Bf3 12.Bf3=) 8.Ra4 (worse is 8.Qa4 a6–/+) 8...Qg6 (8...a6 9.Ba3 ab5 10.Ra8 Ba8 11.Bb4 cb4 12.cb5=) 9.Bb2 (9.Nc3 Nf6 10.Na2 a5=) 9...Nf6 (9...Qg2?? 10.Rg1 Qg1 11.Ng1+–) 10.0–0 d5 (10...a6 11.d4=) 11.Ba3 (11.d4 dc4 12.dc5 Bc5 13.Rc4 Nbd7+=) 11...Ba3 12.Ra3 (12.Na3 Nbd7+=) 12...0–0 (12...dc4 13.Bc4 0–0 14.Qe2=) 13.Ne5 Qf5 (13...Qh6 14.Nc3+=) 14.f4 Ne4 15.d3 (15.Qc1 dc4 16.Nc4 Qd5+/–) 15...Nd6 16.Nd2 dc4 (better is 16...a6 17.b6 Qf6+=) 17.Ndf3?? (17.dc4 a6 18.Bf3 Bf3 A) 19.Nef3?! Rd8+=; B) 19.Rf3?! Qf6+=; C) worse is 19.gf3 f6 20.Ne4 Ne4 (worse is 20...fe5 21.Qd6 ef4 22.ef4+/–) 21.fe4 Qe4=; D) 19.Qf3+–) 17...Nb5–+ 18.Qb1 (better is 18.Ra5 Nc3 19.Qc2 Ne2 20.Qe2 cd3 21.Nd3–+) 18...Na3?? (18...Ba6 19.Ra6 A) 19...Na6? 20.Qb5 Nb4 21.Qc4+– (21.dc4?! f6+/–; 21.Nc4?! a6 22.Qb6 Rab8+=); B) 19...Nc3–+) 19.Qb7+= Nd7 20.Qd7 Nc2 21.Nh4?? Qf6–+ 22.g3 Rfd8 23.Qd8?? Rd8 24.Nc4 Nb4 25.Ne5 a5 26.Nhf3 a4 27.Ra1 Ra8 28.d4 cd4 29.Nd4 Qe7 30.Ndc6 Qc5 31.Kf2 Qc2 32.Kf3 f6 33.Bd1 Qh2 34.Ra4 Qh1 35.Kf2 Ra4 36.Ba4 fe5 (36...fe5 37.Nb4 Qc1–+) 0–1. Zimmer,Georg – Wartig,Wolfgang, corr, 1989.

3.c4 d6

4.Nc3 Bd7 5.Na4 g6 6.Bb2 f6 7.e3 Bg7 8.Nf3 Bg4 9.Be2 e5 10.0–0 Ne7 11.Qb3 e4 12.Nd4 Bd7 13.c5 d5 14.b5 0–0 15.c6 Bc8 16.Nc3 Kh8 17.d3 f5 18.de4 fe4 19.f3 ef3 20.Bf3 Bd4 21.ed4 Be6 22.Rfe1 Bf7 23.Ba3 Re8 24.Be7 Re7 25.Bd5 Kg7 26.Re7 Qe7 27.Bf7 Qf7 28.Qf7 Kf7 29.Nd5 Nc6 30.bc6 a5 31.Re1 a4 32.Nc3 Ra6 33.d5 a3 34.Re2 Ra5 35.Ra2 Ke7 36.Kf2 Kd6 37.Ke3 Kc5 38.Kd3 Kb4 39.Kd4 Kb3 40.d6 cd6 41.c7 Rc5 42.g3 Rc3 43.Ra3 Ka3 44.Kc3 Ka4 45.c8Q 1–0. Trkn – rts28, itsyourturn.com 2000.

3.c4 e5

4.Qa4 Na6 5.Ba3 c5 6.b5 Nc7 (6...Nb4 7.Nf3 e4 8.Ng1=) 7.Nc3 (7.Bb2=) 7...a5 (7...Bb7 8.e4=) 8.e4 (8.Nf3 Qf6+=) 8...Nf6 (8...Ne6 9.Nf3 d6 10.Be2+=) 9.Nf3+– Qe7 (9...Bb7 10.d3+=) 10.d3 g6 (10...Qd6 11.Bb2 Ne6 12.Nd5+–) 11.Bb2 (11.b6 Ne6+–) 11...Bg7 12.Qc2 (12.b6 Ne6+–) 12...d6 13.Nd2 (13.Be2 0–0+–) 13...Ne6+= 14.Ne2 0–0 (14...Nd4 15.Nd4 cd4 16.Be2+=) 15.Nb3 Attacks the isolani on a5 (15.Bc3 Bb7+=) 15...Qc7 (15...a4 16.Nd2+=) 16.Nc3 (16.Qd2!?+=) 16...Nd4= 17.Nd4 ed4 (17...cd4 18.Na4=) 18.Na4 Bd7 (18...Nd7 19.Be2=) 19.g3 (19.Be2 Rab8+=) 19...Bg4 (19...Rfe8 20.Bg2=) 20.Bg2+= Nd7 (20...Rfb8 21.0–0+=) 21.0–0 Be6 (21...Rfb8 22.h3 Be6 23.f4+–) 22.f4 Nb6 23.f5 Bd7 24.f6 Bh6 (24...Bh8 25.Bc1+–) 25.Bc1+– Bc1 26.Qc1 Nc8?? (better 26...Kh8+–) 27.Qh6 Kh8 (27...Bb5 28.Qg7) 28.Qg7 (28.Qf8) 1–0. jaddwarrior (1945) – Lokmev1964 (1880), ChessWorld.net, 2015.

4.Qa4 Na6 5.Bb2 Nb4 6.Nc3 (6.Be5 Qe7 7.Nf3 Bb7+=) 6...a5 7.g3 (7.Nf3 f6+=) 7...c6 (7...Bb7!? 8.f3 Nf6–/+) 8.Nf3 Bd6 (8...d6 9.Nd5 Nd5 10.Qc6 Bd7 11.Qd5+=) 9.Bg2 Nf6 10.–0 0–0 11.d4 ed4 12.Nd4 Be5 13.e3 (13.Rfd1!?+=) 13...Bd4–/+ 14.ed4 Nd3?? (better is 14...Ba6–/+) 15.Ba3+/– Re8 16.Rad1 Nb4 17.Bb4 Bb7? (better is 17...ab4 18.Qa8 bc3+–) 18.Ba3 d5 19.cd5 cd5 20.Bc5 h6 (20...Ne4 21.Rc1+–) 21.Rfe1 Re1 22.Re1 Nh7 (22...Qc8 23.Qb3 Bc6 24.Bd5 Nd5 25.Nd5 Bd5 26.Qd5+–) 23.Nd5! Bd5 24.Bd5 Qd5 25.Re8 Re8 26.Qe8 Nf8 27.Qf8 Kh7 28.Qd6 Qd6 29.Bd6 Kg6 30.Ba3 Kf6 31.f3 Ke6 32.Kf2 Kd5 33.Ke3 g6 34.Kd3 a4 (34...h5 35.Kc3+–) 35.Bc5 f5 36.Kc3 g5 37.Kb4 h5 38.Ka4 Kc4 39.Ka3 Kb5 (39...g4 40.f4+–) 40.Kb3 Kc6 41.Kc4 f4 42.gf4 gf4 43.d5 Kd7 44.Kd4 h4 45.Ke4 (45.Ke4 Ke8 46.Kf4+–) 1–0. stampyshortlegs – 19larry, ChessWorld.net, 2014.

4.Qa4 c6 5.Nc3 (5.Bb2 Qe7=) 5...d6 (5...Nf6 6.e4=) 6.e3 (6.e4 Nf6+=) 6...f5 (6...Nf6 7.d4+=) 7.Nf3 Bd7 (7...Nf6 8.d4 e4 9.Nd2+=) 8.d4 e4 9.Ng1 (9.Nd2 Nh6+=) 9...c5 (9...Nf6 10.Nge2=) 10.b5+= Qb6?? (better 10...a6+=) 11.Nd5+– Qd8 12.Qb3?? (better 12.Qa5 Qa5 13.Ra5+–) 12...Be6 (12...Kf7 13.Bd2 a5 14.Qa4+–) 13.Nf4 (13.b6 Bd5 14.cd5 a5+–) 13...Bf7+= 14.b6 Nc6? (14...ab6 15.Ra8 Pinning (15.Ra8 Deflection); 14...Qb6 15.Qb6 Combination) 15.Qb5+– Nge7 16.b7 (16.dc5?! dc5 17.b7 Rb8 18.Ra7 g5+–) 16...Rb8 17.d5 g5 (17...Qd7 18.dc6 Nc6+–) 18.dc6 Qc7 19.Bb2 Rg8 20.Ra6 (20.Ra7 Kd8 21.Ra6 Bg7 22.Bg7 Rg7+–) 20...gf4 (20...Bg7 21.Bg7 Rg7 22.Ra7+–) 21.Bc3 (21.Ra7 Nc6 22.Ra8 Ke7 23.Rb8 Nb8 24.ef4 Be8=; 21.ef4?! Bg7 22.Bg7 Rg7+–) 21...Rd8 (21...Bg7 22.Ba5 Bc3 23.Bc3 Nc6 24.Rc6 Qd7+–) 22.Ba5 Qb8 23.c7 (23.c7 Nc6 24.Qc6 Ke7 25.cd8Q Qd8 26.Bd8 Ke6 27.Qd5 Kd7 28.Qf7 Kd8 29.b8Q) 1–0. jaddwarrior (1810) – pjato1, ChessWorld.net, 2013.

4.Qa4 Nc6 5.b5 Nd4 6.Bb2 Bd6 7.Bd4 (7.e3!? Ne6 8.Nf3) 7...ed4= 8.Nf3 Bc5 9.d3 (9.e3!? Qe7 10.Be2=) 9...Bb7 10.Nbd2 a6 11.Rb1 Bb6 12.g3 ab5 13.Qb5 Ra5 14.Qb4 Qa8 15.Bg2 Ne7 16.0–0 Nc6 17.Qb2 (17.Qb3 Ra3 18.Qb5 Qa5=) 17...Ra2 18.Qc1 (18.Qb3 Qa3=+) 18...0–0=+ 19.Ra1 (19.c5 Ba5=+) 19...Ra1 20.Qa1 Re8 21.Qa8 Ra8 22.Rb1 d6 23.Ne4 Ra6 24.Ne1 Nd8 25.Bf3 (25.g4 Kf8=) 25...f5 26.Ng5 Ra2 27.Bb7 Nb7 28.Kf1 h6 (28...Nc5 29.Ngf3 Ne6 30.Ng2=+) 29.Ne6 (29.Ngf3 Nd8=) 29...Na5 (29...Nc5 30.Nd4 g6 31.Nc6) 30.Nf4= Nc6 31.Nd5 Ba5 32.Ng2 (32.Nf3 Kf7=) 32...g5 33.h4 Kf7 34.hg5 hg5 35.f4 gf4 36.Ngf4 (36.gf4 Ke6=) 36...Nd8=+ 37.Ng2 c6 38.Ndf4 Kf6 39.Kf2 Nf7 40.Rb7 Ne5 41.Rb1 (41.Rb8 Bc3–/+) 41...Bc3 42.Rd1 Ng4 ½–½. Pommerel,Wim – Kellerer, CiF, 1989.

4.Ra4 d5 5.e3=.

4.b5 a6!?=.

4.b5 g6 5.Bb2 Bg7 6.e3 (6.Ra4 a6=) 6...Ne7 (6...a6 7.Ra4 Bb7 8.Nf3=) 7.Qa4 (7.Ra4 a6+=) 7...0–0 (7...Bb7 8.Nf3=) 8.Nc3 (8.Nf3 e4 9.Bg7 Kg7+=) 8...e4 (8...a6 9.e4=) 9.c5 (9.f3 Bb7+=) 9...Bb7 10.h4 (10.Qc2 Re8=) 10...a6= 11.h5 (11.Qc2 ab5 12.Ra8 Ba8 13.Bb5 h5=) 11...ab5 12.Qb5 Ra1 13.Ba1 Ba6 14.Qb4 (14.Qb1 Bf1 15.Kf1 d5 16.cd6 Qd6=) 14...Bf1=+ 15.Kf1 gh5 (15...d5 16.cd6 Qd6 17.Qd6 cd6 18.Ke2=) 16.Rh5 (better 16.Qe4!? d6 17.Rh5+–) 16...Qc8 (better 16...d5=) 17.Qe4?? (better 17.Bb2 Qa6 18.Nge2=) 17...Ng6?? (better 17...Qa6 18.Ke1 Qa1 19.Nd1 Ng6–+) 18.Qa4 Nc6 (18...Qb7 19.Nd1+–) 19.Nd5+– Qb7 20.Bg7 Kg7 21.Qa1 (21.Nf3 Ra8 22.Qc2 d6+–) 21...f6 (21...Nce5 22.e4+–) 22.Nh3 (22.d4 Ra8 23.Qc1 Ra2+–) 22...Nce5 23.Nhf4 (23.Ndf4 Ra8 24.Qc1 Ra2+=) 23...c6 (23...Ra8 24.Qc1 Nf4 25.Nf4 Ra2=) 24.Ng6 (24.Nb6 Kg8+–) 24...hg6 (better 24...Ra8!? 25.Qa8 Qa8 26.Ne5 fe5=) 25.Re5+– fe5 26.Qe5 Kh6 27.Qh2 (27.Nf4!?+–) 27...Kg7+= 28.Qe5 Kh6 29.Qh2 (29.Nf4!?+–) 29...Kg7+= 30.Qe5 (better 30.Nc3+=) 30...Kg8 (30...Kh6 31.Nf4 Qb3+–) 31.Nf6+– Kf7 32.g3 (better 32.Ng4!? Qb1 33.Ke2+–) 32...Qb1+= 33.Kg2 Qf5? (33...Rh8 34.Kf3 Qd1 35.Kf4 Qe2+–) 34.Qf5+– gf5 35.Nd7 Rc8 (35...Re8 36.d4 Ke6 37.Ne5+–) 36.Ne5 Ke6 37.d4 Kd5 38.Kf3 Rh8 39.Ng6 Rh2 (39...Re8+–) 40.Ne7 Kc4 41.Nf5 (41.Nc6 Kd5 42.Ne5 Ke6+–) 41...Kd3 (41...Rh1 42.g4+–) 42.Nd6 (42.Ne7 Rh6+–) 42...Kd2 (42...Rh6 43.g4+–) 43.Ne4 (better 43.Nc4!? Ke1+–) 43...Kd3 44.g4 Rh3 (44...Rh7 45.g5+–) 45.Kf4 Ke2 (45...Rh8 46.Nd6+–) 46.g5 Rf3 (46...Rh7 47.Nf6 Rc7 48.e4 Kf2 49.d5+–) 47.Kg4 (better 47.Ke5!? Rf7 48.Kd6 Kf3 49.Nd2 Kf2+–) 47...Rf8 48.g6 Re8 (48...Kd3 49.Ng3 Rg8 50.Kg5+–) 49.Nf6 Re7 50.e4 White prepares d5 50...Kf2 (50...Rc7 51.d5 cd5 52.ed5 Rc5 53.d6+–) 51.Kf5 (better 51.d5 Rg7 52.Kf5 cd5 53.ed5 Rc7+–) 51...Ke3 (51...Rc7+–) 52.d5 Rc7 53.d6 Rc8 54.g7 (54.g7+–) 1–0. jaddwarrior (1795) – MickeyUK (1645), ChessWorld.net, 2013.

3.c4 e6

4.Qa4 Bb7 5.Bb2 Nf6 6.Nf3 (6.c5 Be7=) 6...a6 (6...Nc6 7.b5 Nb4 8.Qb3=) 7.e3 (7.c5 Be7=) 7...Bc6 8.b5 (8.Qb3!?=) 8...ab5–/+ 9.Qb3 (9.Qd1 Ra1 10.Ba1 b4–/+) 9...Ra1 10.Ba1 bc4 (10...Bf3 11.gf3 bc4 12.Bc4–/+) 11.Bc4 Bf3 12.gf3 (12.Bf6 gf6 13.gf3 d5 14.Bb5 c6–/+) 12...Nc6 (better is 12...Be7–/+) 13.d4? (better is 13.Bb5!?–/+) 13...Na5–+ 14.Qa4 Nc4 15.Qc4 Qa8 16.Bc3 Qf3 17.Rg1 (17.Rf1 Nd5–+) 17...Ng4 Threatening mate: Qxf2 18.Qe2 Nh2 19.Nd2 (19.Qb2 Ng4–+) 19...Qc6 20.Bb2 (20.Ba5–+) 20...Bb4 21.Rg3 Qh1 (21...Qh1 22.Rg1 Qg1 23.Qf1 Qf1 0–1. alaamattar (2245) – pcmvr (2775), net–chess.com, 2008.

4.Qa4 Bb7 5.Nf3 a6 6.Bb2 Nf6 7.c5 Be7 8.d4 h6 9.e3 0–0 10.Nc3 1–0. Woelfelschneider,Peter – Neumann, THT8, 2001.

4.Ra4 Nc6 5.b5 Nd4.

4.Bb2 Bb4 5.Bg7 Bd2 6.Nd2+–.

4.Bb2 Nf6 5.Qa4 Nc6 6.b5 Nb4 7.Nf3 Bb7 8.e3 Be7 (8...Be4 9.Bf6 Qf6 10.Nd4–/+) 9.d4 (9.Bf6 Bf6 10.d4 a5=) 9...c5 (9...Be4 10.Na3=+) 10.Be2 (10.Bc3 Be4 11.Bb4 cb4) 10...0–0 (10...Bf3 11.gf3 a6 12.Bc3) 11.0–0 Be4 (11...a6 12.dc5 Bc5 13.Qa5=) 12.Ne1 (better is 12.Nc3!?) 12...a6= 13.Qb3 (13.dc5 Bc5 14.Qd1 ab5 15.Ra8 Ba8 16.cb5 d6=) 13...d5 (13...ab5 14.Ra8 Qa8 15.dc5 Bc5 16.Bf6 gf6 17.cb5=) 14.ba6 Ra6 15.Ra6 Na6 16.Nd2 Qc7 (16...Qb8!?=+) 17.Ne4 Ne4 18.Nf3 (18.cd5 Nd2 19.d6 Bd6–/+ (19...Nb3?! 20.dc7 Nc7 21.Nc2=; 19...Qd6?! 20.Qc2 Nf1 21.Bf1–+)) 18...Rb8=+ 19.Qc2 Nb4 20.Qc1 Qb7 21.Ba3 Na2 22.Qc2 Qb3 (22...Nb4 23.Bb4 Qb4 24.Bd3=) 23.Qb3= Rb3 24.Bc5 Nc5 25.dc5 Rb2 (better is 25...Nc3 26.Bd1 Nd1 27.Rd1 dc4) 26.c6–+ Bd6?? (26...Re2 27.c7 f6+–) 27.Bd3 Nb4=+ 28.c5 Bc7 29.Bb5= Na2 30.Ba6 Rc2 31.Ra1 e5 32.g3 Rc1 33.Rc1 Nc1 34.Nd2 Kf8 35.Kf1 Ke7 36.e4 d4 37.Bc4 f6 38.Ke1 d3? 39.Nb3 Nb3= 40.Bb3 Ba5 41.Kd1 ½–½. Dumontelle,Joe – Knechtel,Tim, North Bay op, 1989.

3.e3 Bb7

4.Nf3 Bc8 5.Be2 a6 6.0–0 g6 (6...d5 7.Ra4 Bd7 8.Ra2+–) 7.Bb2 f6 8.d4 Nh6 (8...e5 9.c3+–) 9.e4 Bb7 10.Nc3 1–0. DEFFM – GuestQVCJ, freechess.org, 2018.

4.Nf3 e6 5.Ba3 Nf6 6.Be2 d5 7.c3. Geiger,Walter (2065) – Hall,Dick (1615), TE.2004.P.01707, 2004.

4.Nf3 e6 5.b5 Bc5 (5...a6 6.Ra4 Nf6 7.Bb2=) 6.Bb2 (6.d4 Be7=) 6...Nf6 7.Be2 0–0 (7...a6 8.Ra4 ab5 9.Ra8 Ba8 10.Bb5=) 8.0–0 a6 9.Ra4 ab5 10.Ra8 Ba8 11.Bb5 d6 12.d4 (12.Nc3 Bc6=) 12...Bb6 (12...Bb4 13.Bd3=) 13.Nbd2 c5 (13...c6 14.Bd3=) 14.c3 (14.dc5 Bc5 15.c4 Nbd7=) 14...Bc6 15.c4 Bb5 (15...cd4 16.Bd4 e5 17.Bb6 Qb6 18.Qa4=) 16.cb5 d5 (16...cd4 17.Bd4 Bd4 18.Nd4+=) 17.Ba3 (17.dc5 Bc5 18.Qc2 Nbd7=) 17...Nbd7 18.Qc2 Qa8 19.Bc5 Rc8 20.Rc1 (20.Nb3 Ne4=) 20...Nc5 (20...Qb7 21.Nb3 Ne4 22.Ne1=) 21.Nb3 Nfe4 22.dc5 Nc5 23.Ne5 Rc7 24.Nc6 Nd7 (24...Nb3 25.Qb3 Bc5 26.Qd3+=) 25.Qc3 (25.Ra1 Qf8+=) 25...f6 (25...Nb8 26.Ra1 Qb7 27.Nba5 Ba5 28.Qa5+=) 26.Ra1 Qe8 27.Ra6 1–0. DEFFM – GuestDPKP, freechess.org, 2018.

4.Nf3 Nf6 5.Ra4 Nc6 6.b5 Nb8 7.Bb2 e6 8.Nc3 d6 (8...d5!?+–) 9.Qa1+– Nbd7 10.Ra7 Ra7 11.Qa7 Bf3 12.gf3 Be7 13.Rg1 0–0 14.f4 Nc5 (14...d5 15.Na4+–) 15.Be2 (15.Ne2 Re8+–) 15...d5 (15...g6 16.Bf3+–) 16.Na4 Na4 17.Qa4 Bc5 (17...g6 18.Qd4+–) 18.Qa1 d4 19.Bf3 Qd6? (better 19...g6+–) 20.ed4 Bb6 (20...Bb4 21.d5 Qf4 22.Bf6+–) 21.d5 e5 (21...Qc5 22.Rg2 e5 23.Qa4+– (23.Be5?! Qb5 24.Bf6 Re8 25.Be5 f6+–)) 22.fe5 Re8 (22...Qc5 23.d4 Qc2 24.ef6 Re8 25.Kf1 Qd3 26.Kg2 Qg6 27.Kh1 Qf6 28.Rg3+–) 23.Kd1 Qc5 24.d4 (24.ef6?! Qf2 25.c4 Qg1 26.Kc2 Qf2=) 24...Qb5 (24...Qe7 25.Qa3 Qa3 26.Ba3+–) 25.ef6 g6 (25...Ba5 26.Rg7 Kh8 27.Rg1+–) 26.Qc1 Ba5 (26...Qb4 27.Qh6 Qf8 28.Qf8 Kf8+–) 27.Qh6 Re1 28.Re1 Be1 (28...Qd3 29.cd3 Be1 30.Qg7) 29.Qg7 1–0. Pierre – GuestMaack, internet, 2020.

3.e3 e5

4.Ra4 d5 5.Bb2=.

4.Ra4 Nf6+=.

4.b5 a3 5.Nf3 a2 (5...e4 6.Nd4+–) 6.Ra2 (6.Nc3 Bd6+–) 6...e4+– 7.Nd4 d5 (7...c5!? 8.bc6 Nc6 9.Nc6 dc6+–) 8.c4 c5? (better 8...Nf6 9.Nc3 Bb7+–) 9.bc6 dc4 (9...Nf6 10.Qa4 Bc5 11.c7 Qd7 12.cb8Q Rb8 13.Nc3 Qa4 14.Ra4+–) 10.Bc4 Qd4 (10...Nf6 11.Qb3 Bc5 12.Bf7 Kf8+–) 11.ed4 Ke7 (11...Nc6 12.Qh5 Nf6 13.Qf7 Kd8+–) 12.Ba3 Kf6 13.Qh5 Ba3 (13...Bf5 14.Qf7 Kg5 15.h4 Kh6 16.Bf8 Bg6 17.Qg7 Kh5 18.Be2) 14.Qf7 Kg5 15.h4 (15.h4 Kh6 16.Qf4 Kg6 17.h5) 1–0. DEFFM – GuestXWPJ, freechess.org, 2017.

4.b5 Nf6!?=.

4.Nf3 e4+= 5.b5?? (better 5.Nd4+=) 5...ef3–+ 6.Qf3 c6 (6...Qf6 7.Qa8 Qa1 8.Qb8–/+) 7.Ra4 Bb7 8.Re4 (8.Bb2 Nf6 9.Nc3 Qb6–/+) 8...Be7 9.Rg4 (9.Ba3 d5 10.Rg4 Kf8–+) 9...Bf6 (better 9...Kf8!? 10.Ba3 Nf6–+) 10.Ba3 Qa5 11.Bd3 Qb6 (11...Ne7 12.Rf4 Kd8 13.0–0=+) 12.Nc3 cb5 13.Qg3 Nh6 (13...Ne7 14.Nb5 Kf8 15.Nc3–/+) 14.Nb5 Qb5?? (14...Ng4 15.Nd6 Kd8=) 15.Bb5+– (15.Bb5 Ng4 16.Qg4+–) 1–0. DEFFM – GuestNZRV, freechess.org, 2017.

3.e4 e5

4.Ra4 c6 5.Bb2 Nf6 6.Be5 Ne4 7.Qe2 d5 (7...d6 8.Qe4 de5 9.Qe5 Be6 10.Bc4) 8.d3 (better is 8.f3 Qe7 9.Bb8+– (9.fe4?! Qe5 10.Nc3 d4)) 8...Nf6?? (better is 8...Qe7 9.Bb8 Rb8 10.de4 Rb4 11.Rb4 Qb4 12.Nd2 de4+–) 9.Bf6+– Be7 10.Bg7 Rg8 11.Bf6 Be6 12.Be7 Qe7 13.Nf3 Bg4 14.Nbd2 Nd7 15.Qe7 Ke7 16.d4 Nb6 17.Ra5 Bd7 18.h3 Kd6 19.g4 Rge8 20.Kd1 Re6 21.g5 (21...f5 22.Bd3+–) 1–0. Taulien,Hans_Juergen (2225) – Tiedemann,Joern (1810), remoteschach.de, 2004.

4.Ra4 Nf6 5.Nf3 Bd6 6.Bc4 Bb7 7.d3 0–0 8.0–0 c5 9.bc5 Bc5 10.Ne5 d5 11.Bb3 de4 12.de4 Qe7 13.Nd3 Ne4 14.Re1 Bd6 15.Bb2 Kh8 16.Nd2 f5 17.Qh5 Bc6 18.Ra5 Nf6 19.Re7 Nh5 20.Rea7 Ra7 21.Ra7 Nd7 22.Be6 Rd8 23.Nc4 Bb8 24.Ra6 Bb5 25.Nd6 Bd6 26.Rd6 Nhf6 27.Bf6 gf6 28.c4 Ra8 29.f4 Ra6 30.Ra6 1–0. marekt – mafergut, ChessWorld.net, 2003.

3.e4 Nf6

4.Nc3 Bb7 5.e5 Nd5 6.Nd5 Bd5 7.Ra4 e6.

4.e5 Nd5 5.c3 d6 6.d4 de5 7.de5 Bf5 8.Qa4 Qd7 9.Qd7 Nd7 10.Nf3 Bb1 11.Rb1 Nc3 12.Rb3 Nd5 13.e6 fe6 14.Bb2 (14.Bd2 Rb8=+) 14...e5 (14...Rb8 15.b5=+) 15.Ne5 Ne5 16.Be5 e6 17.b5 Bb4 18.Kd1 0–0 19.f3 Rfd8 20.Bd3 Bd6 21.Bd6 Rd6 22.Kd2 c6 23.bc6 Rc6 24.Ra1 a5 25.Rba3 Rc5 26.Be4 Kf7 27.Kd3 e5 28.g3 h5 29.Bd5 (29.h4 Ra7–/+) 29...Rd5 30.Ke4 Ke6 31.Ra4 Ra6 32.h4 Rc5 ½–½. Mystra – marekt, ChessWorld.net, 2003.

3.Nf3 Bb7

4.Ra4 Nc6 5.b5 Nb8 6.e3 (6.e4 e6 (6...a6 7.Nc3 e6+= 8.Bb2 Nf6 9.e5 Ng8 10.Be2 ab5 11.Ra8 Ba8+=) 7.Be2 a6 8.ba6 Bc6 9.Ra1 Be4 10.Bc4 Qc8 11.Qe2 Bf3=; 6.Nc3 a6 (6...e6 7.e4 a6 8.Bb2 Nf6 9.e5 Ng8 10.Be2 ab5 11.Ra8 Ba8+=) 7.e4 e6 8.Bb2 Nf6 9.e5 Ng8 10.Be2 ab5 11.Ra8 Ba8+=) 6...Nf6 (6...a6 7.Bb2 Nf6 8.Bc4 e6 9.0–0 Be7 10.Nc3 ab5 11.Ra8 Ba8+=; 6...e6 7.Ba3 Ba3 8.Na3 Nf6 9.Bc4 a6 10.0–0 0–0 11.Qe2 ab5=) 7.Bb2 g6 (7...a6 8.Bd3+= (8.Be2 e6 9.0–0 Be7 10.Nc3 ab5 11.Ra8 Ba8+=) 8...e6 9.0–0 Be7 10.Nc3 ab5 11.Ra8 Ba8+=) 8.Nc3 Bg7 9.Qa1 a6 (9...Bf3 10.gf3 d5 (10...c6 11.Ra7 Ra7 12.Qa7 cb5 13.Bb5+/–) 11.Ra7 Ra7+=) 10.ba6+/– Ra6?? (better is 10...Bc6 11.a7 (11.Ra3 Bf3 12.gf3 Nc6+/–) 11...Ba4+=) 11.Ba6+– Bf3 (11...Na6 12.Ra6 Ba6 13.Qa6 0–0+–) 12.gf3 c6 13.Bd3 0–0 14.Ra8 Qc7 (14...d5 15.Na4+–) 15.Ke2 (better is 15.Ne4+–) 15...Nd5 (15...d5+–) 16.Nd5 Bb2 (16...cd5 17.Bg7 Rc8 18.Bh6+–) 17.Ne7 Kg7 18.Qb2 f6 19.Rg1 Rf7 (19...Kf7 20.Bg6! Ke7 21.Bh7 c5 22.Rg7 Rf7 23.Rf7 Kf7 24.Rb8 Kg7+–) 20.Nf5 Kf8 21.Rb8 (21.Rb8 Qb8 22.Qb8; 21.Qb8 Qb8 22.Rb8) 1–0. pierre – Rudolf, internet, 2008.

4.Ra4 Nc6 5.e4 e6 A) 6.Ba3 a5 (6...Be7 7.d4 Nb8 8.Bd3 Nf6 9.Nbd2 d5 10.e5 Ne4 11.Qa1 Qd7+/–) 7.b5 Nce7 8.Bd3 Nf6 9.Nc3 d6 10.0–0 Nd7 11.Be2 Ng6+=; B) 6.c3 a5 (6...Nf6 7.d3 Be7 8.Be2 0–0 9.0–0 a6 10.Bf4 d6 11.Nbd2 e5+=) 7.b5 Nce7 8.Be2 Nc8 9.d3 Nb6 10.Ra1 d5 11.e5 Qd7+=; C) 6.b5 Nb8 7.Nc3 a6 8.Bb2 Nf6 9.e5 Ng8 10.Be2 ab5 11.Ra8 Ba8+=.

4.Ra4 Nc6 5.e4 Nf6 6.b5 Nb8 7.Nc3 a6 8.e5 Nd5 9.Nd5 Bd5 10.ba6 Bb7 11.e6 Na6+–.

4.Ra4 Bf3 5.ef3 Nc6 6.b5 Ne5?? (Better is 6...Nb8–/+) 7.f4+– Ng6 8.f5 a6 (8...e6 9.fg6 hg6 10.d4+–) 9.fg6 hg6 10.ba6 Qb8 11.Nc3 c6 12.h3 e5 13.Qe2 Bd6 14.d4 Ne7 15.Ne4 Bc7 16.Ba3 Qb1 17.Qd1 Qa2 18.Bc4 Qa3 19.Bf7! Kf7 20.Ra3 d5 21.Ng5 Kf6 22.Nf3 e4 23.Nd2 Nf5 24.c4 Nd4 25.Ne4! Ke5 26.f4! Ke4 27.Qd3 Kf4 28.Qe3 Kf5 29.Rf1 Nf3 30.Rf3 Bf4 31.Rf4 Kg5 32.Qe5 Kh6 33.Rh4 1–0. b4_player (1925) – salvati (1930), GameColony.com, 2002.

4.c3 e6 5.d3 Nf6 6.e4 c5 7.e5 (worse is 7.Ra4 cb4 8.e5 Nd5–/+) 7...Nd5 8.bc5 Bc5 9.Qa4 0–0 10.d4 Be7 11.Bd3 Nc6 12.0–0 d6 13.Rd1 de5 (13...Qc7 14.Bg5=) 14.de5+= Qc7 15.Qe4 g6 16.Qe1 Rfd8 17.Na3 a6 18.Nc4 Nb6 (18...f6 19.ef6 Bf6 20.Bg5+=) 19.Nb6 Qb6 20.Be3 Qc7 21.Ng5?? (better is 21.Rab1 Rdb8 22.Bb6+=) 21...Ne5–/+ 22.Qe2 (22.Be4!?–/+) 22...Nd3–+ 23.Rd3 Qc6 (23...Qc6 24.Rd8 Rd8–+) 0–1. Reliquiante – Fournier,Frederic (1835), Active, 2007.

4.c3 Bf3 5.ef3 e6 6.d4 Nf6 7.Bd3 Be7 8.0–0 d6 9.Bg5 0–0 10.Qc2 Nd5 (10...Nbd7!?+=) 11.Be7+/– Qe7 12.Bh7 Kh8 13.Be4 Nf6?? (better is 13...c6+/–) 14.Ba8+– Nbd7 15.Bc6 Nb6 16.c4 d5 (16...Rb8 17.Re1+–) 17.c5 Nc4 18.Ra4 Rb8 19.b5 1–0. bulent_2010 – retiponziani, ChessWorld.net, 2012.

4.c3 Bf3 5.ef3 e6 6.d4 Nh6 7.Bd3 Be7 8.0–0 d6 9.Bg5 Kd7 10.Qc2 Qf8 11.Bf6 Qe8 12.Bh7 1–0. bulent_2010 (2560) – retiponziani (1920), ChessWorld.net, 2012.

4.Nc3 a5 5.b5 c6 6.e4 cb5 7.Bb5 Ba6 8.0–0 Bb5 9.Nb5 Qb6 10.c4 Nf6 11.d3 d6 12.Qa4 Nc6?? (12...Nbd7+–) 13.Rb1 Nb4 (13...Qd8 14.Nfd4 Nd7 15.Nc6 Nc5 16.Nd8 Na4 17.Nc7 Kd8 18.Na8 Nc5+–) 14.Nc7 (14…Kd8 15.Na8+–) 1–0. kamret (2185) – p.i.sumi, GameColony.com, 2003.

4.Nc3 e6 5.Ra4 Nf6 6.Bb2 (--> 2.Bb2 Nf6 3.a4 ba4 4.Nf3 e6 5.Ra4 Bb7 6.Nc3).

4.Nc3 e6 5.b5 a3 6.Ba3 Ba3 7.Ra3 Nf6 8.Qa1 a6 (8...d6!?+/–) 9.e3+– Bf3 10.gf3 a5 11.Rg1 g6?? (better is 11...Rg8+–) 12.Ne4 d5 (12...d6 13.Nf6 Ke7 14.b6 cb6 15.Bb5+–) 13.Nf6 Kf8 14.Nd5! Qd5 (14...Qd5 15.Qh8 Double attack (15.Qh8 Discovered attack); 14...ed5 15.Qh8 Double attack (15.Qh8 Discovered attack)) 15.Rd3 Qf3 (15...Rg8 16.Rd5 ed5 17.Qa3 Ke8+–) 16.Qh8 (16.Qh8 Ke7 17.Qd8 1–0. Janek – Junette, internet, 2016.

4.Nc3 Bf3 5.ef3 Nf6 6.Ra4 e6 7.Be2 d5 8.0–0 Qd7 9.b5 d4 10.Ne4 Nd5 11.Rd4+/– Bc5?? 12.Nc5+– (12...Qc8 13.Bb2+–) 1–0. pierre – jan fagap, internet, 2009.

4.e3 e6 5.Ra4 Nf6 6.Bb2 Nd5 7.b5 c5 8.c4 Nb4 9.d3 a6 10.Nc3 ab5 11.Ra8 Ba8 12.Nb5 Bf3 13.Qf3 Qa5 14.Nc3 Na2 15.Qd1?? Nc3 16.Qd2 Qb4 17.Bc3 Qb1 18.Qd1 Qd1 19.Kd1 f6 20.Be2 Be7 21.Bh5 g6 22.Bf3 0–0 23.Ke2 Na6 24.Rb1 Rb8 25.Ra1 Rb6 26.Ra5 d6 27.Rb5 Rb8 28.Ba5 Kg7 29.g3 f5 30.Bc6 Rb5 31.cb5 Nb8 32.Bb7 d5 33.Bc8 Bd6 34.Be6 d4 35.ed4 cd4 36.Bb6 Kf6 37.Bc4 Kg5? 38.Bd4 Kg4 39.Bg8 h6 40.Bf7 g5 41.Be6 h5 42.Bf6 Kh3 43.Bg5 Kh2 44.Bf5 Kg2 45.d4 Bc7 46.Ke3 Bd6 47.Bf6 Bc7 48.Be5 (48...h4 49.Bc7+–) 1–0. Pommerel,Wim – Cane, CiF, 1990.

4.Ra4 Bc6

5.Ra5 Bb7 6.Bb2 e6 7.Bc3 Nf6=.

5.Ra5 e6 6.b5 Bb4 7.Ra4 Bd2? (better is 7...Bf3 8.Rb4 Bh5+=) 8.Nbd2 Bb5 9.Rg4 Qf6 10.Rb4 (10.Rb4 Bc6 11.Bb2+–) 1–0. b4_player – valentino, internet, 2013.

4.Ra4 e6

5.e3 a6 6.Bb2 Bc6 (6...Nf6 7.Nc3=) 7.b5+= ab5 8.Ra8 Ba8 9.Bb5 Nf6 10.0–0 Nc6 11.Nc3 Be7 12.e4 0–0 13.Re1 e5 (Better is 13...Qb8!? 14.Ba1 Qa7=) 14.Bc6–/+ Bc6 15.Ne5 Bb7 16.d3 Re8 17.Qf3 Bb4 18.Ng4 Ng4 19.Qg4 f6 20.Rb1 d5 (20...c5!?–/+) 21.Nd5+– Bd5 22.ed5 Qd5?? (Better is 22...Bf8+–) 23.Qb4 (23...Qa2 24.Ra1+–) 1–0. lucya (2115) – NJFun (2125), GameColony.com, 2002.

5.e3 Bc6 6.b5 Bd5 7.Bb2 f6 8.Nc3 Ne7 9.e4 Bb7 10.Qa1 Ng6 (10...Nc8!?+=) 11.Ra7+/– Ra7 12.Qa7 Qc8 13.Bc4 d5 (13...c6 14.0–0+/–) 14.ed5+– ed5? (14...Nf4 15.Qd4 Bd6 16.0–0+–) 15.Qe3 Be7 16.Nd5 Bd5 17.Bd5 Qf5 18.Qe4 Qe4 19.Be4 0–0 20.Kd1 Nd7 21.Re1 Nf4 22.g3 Nh3 23.Bd5 1–0. b4_player (2235) – NN, GameColony.com, 2003.

5.e3 Nc6 6.b5 Nce7 (6...Nb8 7.Bb2 (7.Ba3 Ba3 8.Na3 Nf6 9.Bc4+= 0.28; 7.Nc3 a6 8.e4 ab5 9.Ra8+= 0.28) 7...a6 8.Bd3 Nf6 9.0–0+= 0.31; 6...Nb4 7.Ba3 (7.Be2 a5 8.Bb2 Nf6 9.0–0+= 0.41; 7.Bb2 Nf6 8.Be2 a5 9.0–0+= 0.34) 7...Bf3 8.gf3 Nd5 9.Bf8+= 0.56) 7.Nc3 (7.Bb2 c6 8.Nc3 Nf6 9.Be2+= 0.44; 7.d4 c6 8.c4 cb5 9.cb5+= 0.47) 7...g6 (7...c6 8.Bb2 Nf6 9.Be2+= 0.44) 8.Bb2 Bg7 9.Qa1 (9.Be2+/– 0.88) 9...Qb8 10.Ne4 Bb2 11.Qb2 f6 12.Nc5 Bc6 (12...Bf3!? 13.gf3 a5+=) 13.Ng5! e5 14.bc6+– Nc6 15.Bb5 Nge7 16.Nge4 Kf7 17.Nd7 Qb7 18.Bc4 Kg7 19.Qb7 1–0. marekt – Aaron_boone, internet, 2013.

5.e3 d5 6.Bb5 c6 7.Bd3 Nd7 8.Ba3 Nb6 9.Ra5 Bd6 10.0–0 e5 11.Bb2 (11.Be2 Qc7=) 11...f6 12.Nh4 e4 13.Qh5 Kf8 14.Be2 Bb4 15.Ba3 Ba3 16.Ra3 Qe8 17.Qe8 Ke8 18.Nf5 Kf8 19.Nc3 g6 (19...Bc8!? 20.Nd4 Bd7=) 20.Nd6+= Bc8 21.Rb1 Ke7 22.Nde4 Nd7 (22...de4 23.Rb6 Decoy) 23.Ng3 Nb8 24.Bf3 Nh6?? (better is 24...Ke6+/–) 25.Nd5!+– cd5 (25...Kd6 26.Nb6! ab6 27.Ra8+–) 26.Bd5 1–0. marekt – Duke of Wellington, ChessWorld.net, 2015.

5.e3 f5 6.Be2 Nf6 7.0–0 Be7 8.Bb2 0–0 9.c4 a6 10.Qb3 Nc6 11.Nc3 a5 12.b5 Nb4 13.Nd4 Bc5 14.Raa1 (14.Rfa1 c6+=) 14...Ne4= 15.Ne4 fe4 16.f4 Rf6 17.Bc3 Rh6 18.h3 Qh4 19.Bb4 Exerts pressure on the isolated pawn 19...Qg3 (better is 19...Bb4!? 20.c5 Bd5= (20...Bd2 21.c6 dc6 22.bc6 Bc6 23.Nc6=)) 20.Bc5+/– Rh3 Threatening mate... how? 21.Nf3 (21.Bg4 Qh2 22.Kf2 Qg3 23.Ke2 Qg4 24.Ke1 Qg2=) 21...ef3= 22.Rf3 Qh2 23.Kf2 Rf3 24.Bf3 Bf3 25.Kf3 Qh5 26.g4 Qc5 27.d4 Qe7 28.Kg3 g5 29.c5 Qg7 30.Qd3 h5 31.f5 Qf7 32.Rf1 Qh7 Black plans h4 33.Qe4+/– White intends c6 33...Rf8 34.c6 h4 35.Kh3 dc6 36.Qe6+– Qf7 37.Qc6 Qe7 38.Qg6 Qg7 39.Qe6 Qf7 40.Rc1 (40.Rc1 Qe6 41.fe6 Rf3 42.Kg2 Re3 43.d5 (worse is 43.Rc7 Re6 44.Rc5 Re2 45.Kf3 Rb2+/–) 43...Rg3 44.Kf2 Rg4 45.Rc7 Rf4 46.Ke3+–) 1–0. Woelfelschneider,Peter – Majrecki, 2009.

5.e3 Nf6 6.Bb2 Be7 7.Be2 0–0 8.0–0 d5 9.d4 Nc6 10.b5 Nb8 11.c4 (11.Nc3 c6+=) 11...c6 12.c5 Nbd7 (12...cb5 13.Bb5 Bc6 14.Nc3=) 13.Nc3+= h6 14.Qc2 Re8 15.Rfa1 cb5 (15...Qb8 16.Ra5+–) 16.Bb5 Nb8? (better 16...a6 17.Ba6 Ba6 18.Ra6 Ra6 19.Ra6 Qc8+–) 17.Be8+– Ne8 18.Ra7 (18.Ra7 Ra7 19.Ra7+–) 1–0. pierred (2800) – pushtiu (2215), net–chess.com, 2016.

5.e3 Nf6 6.c3 Be7 7.d4 0–0 8.Bd3 d6 9.Nbd2 Nbd7 10.Ra1 Nb6 11.0–0 c5 12.bc5 dc5 13.Qc2 Qc7 14.Ba3 Rfe8 15.Ne5 Rac8 16.c4 h6 17.Bb2 Ba8 18.f4 Qb7 Threatening mate: Qxg2 19.Ndf3 Ne4 20.Rfd1 Red8 21.Ra5 Bd6 22.Ba3 f6 23.dc5+/– fe5 24.cd6 ef4 25.c5 Nd7? 26.Ba6+– Qc6 27.Nd4 Qd5 28.Ne6!! Qc6 29.Bb5 Qb7 30.Nd8 Rd8 31.c6 (31.c6 Qb6 32.c7+–) 1–0. Woelfelschneider,Peter – WRI, 2009.

4.Ra4 Nf6

5.Bb2 Bc6 6.Ra5 g6 (6...a6!?=) 7.Nc3 Bg7 8.Qa1 Bf3 9.ef3 Nc6 10.Ra4 0–0 (10...Nd4 11.Bd3+–) 11.b5 Nb8 12.Ra7 Ra7 13.Qa7 d5 14.Be2 Nbd7 15.0–0 Nb6 16.Ba3 Re8 17.g3 Qd7 18.Bc5 Nc4 19.Rd1 White prepares the advance b6 19...Nd6 20.Kg2 e5? (better 20...Rd8+–) 21.b6 Rd8 (21...d4 22.Bd6 Qd6+–) 22.b7 Qe8 23.Bd6 cd6 24.Ra1 Rb8 (24...d4 25.Nb5 Qf8+–) 25.Nd5! Nd7 (25...Nd5 26.Qb8 Combination) 26.Bb5 (26.Bb5 Rb7 27.Qb7+–) 1–0. Marekt – On2xanadu, gameknot.com, 2019.

5.Bb2 Bf3 6.ef3 e6 7.Nc3 Nc6 (7...d5 8.Be2+=) 8.b5 Nb4 9.Ne4 a5 (9...c6!?+=) 10.ba6+/– Ra6?? (better is 10...Ne4 11.fe4 Qh4+/–) 11.Ba6+– (11…Ne4 12.fe4+–; < 11.Ra6 Ne4 12.fe4 Na6 13.Ba6 Qg5+–) 1–0. b4_player (2180) – salvati (1825), GameColony.com, 2002.

5.e3 Bc6 6.b5 Bd5 7.Nc3.

5.e3 Nd5 6.d4=.

5.e3 g6 6.d4 Bg7 7.Bd3 0–0 8.0–0 c6 9.e4 d6 10.Be3 Re8 11.Nbd2 Nbd7 12.Qa1 e5 13.de5 Ne5 14.Ne5 de5 15.Ra7 Ra7 16.Qa7 Qc8 17.Nc4 c5 (better is 17...Re6+–) 18.Nd6 (18.Qc5 Ne4 19.Qc8 Rc8 20.Be4 Be4+–) 18...Qa8 (18...Qb8 19.Qb8 (19.Qc5?! Nd7 20.Qb5 Qd6 21.Qb7 Rb8+–) 19...Rb8 20.Bc5+–) 19.Qb7 Qb7 20.Nb7 cb4 21.Rb1 h5 (21...Bf8 22.Ra1+–) 22.Rb4 Ra8 23.f3 Bf8 24.Rb5 Kg7 (24...Rb8 25.c4+–) 25.Re5 Rb8 (25...Bb4 26.Rb5 Bc3 27.Nc5+–) 26.Rb5 Ra8 27.Kf2 Ne8 28.Rb6 Nc7 29.Bd4 Kg8 (29...Kh6 30.Bc4 Ra4 31.Rc6+–) 30.Bc4 Ne6 31.Be6 fe6 32.Re6 Ra7 (32...Kh7+–) 33.Ba7 Kf7 34.Nd8 (34...Kg7 35.Bd4 Kh7 36.f4+–) 1–0. kamret (2195) – NN, GameColony.com, 2003.

5.e3 e6

6.Bb2 Bc6 7.b5 Bb7 8.Nc3 Be7 9.Qa1 0–0 10.Be2 c6 (10...Bc5 11.0–0) 11.Ra7 Ra7 12.Qa7 Qc7 13.b6 Qc8 14.0–0 d5 15.Ra1 (15.Rb1 Nbd7) 15...Nbd7 (15...c5 16.Ne5+–) 16.Ba6 Ba6 17.Ra6 Bc5 18.Na4 Ne4 (18...Bd6 19.Bf6 Nf6 20.d4) 19.b7+– Qb8 (19...Qe8 20.Nc5 Ndc5 21.Rc6 Nb7 22.Qb7+–) 20.Qb8 Rb8 21.d3 (21.Nc5?! Nec5 22.Rc6 Rb7 23.Rc8 Nf8 24.Rc5 Rb2) 21...Nd6?? (21...Rb7 22.Ra8 Nf8 23.de4 Ba3 24.ed5 cd5+–) 22.Nc5 Nc5 23.Ra8 Nd7 24.Be5 (24...Nb7 25.Bb8+–) 1–0. MT – guest576, ICC, 2004.

6.Bb2 Nd5 7.Bc3=.

6.d4 Nc6 7.b5 Nb4.

6.Bb2 Be7

7.Bc4 0–0=.

7.Be2 0–0=

8.0–0 a6 9.c3 d5 10.Qc2 Nbd7 11.d4 Nb6 12.Ra5 Bd6 13.Nbd2 Qe7 14.Rfa1 1–0. pcmvr (2850) – ramoschessbrasil (2480), net–chess.com, 2011.

8.0–0 Nc6 9.b5 Nb8 10.Rh4 (10.Nc3!?) 10...Ne4 11.Rh3 Bf6 (11...a6 12.d3 Nf6 13.ba6 Na6 14.c4=) 12.d4 (12.Ba3 Be7=) 12...c5 (12...a6 13.Nc3=) 13.Ne5 (13.Nc3 a6=) 13...d6 14.Ng4 cd4 (14...a5 15.f3 Ng5 16.Rg3) 15.Nf6 Nf6 (15...Qf6 16.f3 Ng5 17.Rg3) 16.Qd4 Qb6?? (better is 16...e5 17.Qh4 a6) 17.Qf6!!+– (17...e5 18.Rg3+–) 1–0. Jonas,Vlastimil (2025) – Subrt,Petr (1770), Blitz, 2005.

8.0–0 d5 9.c3 Nbd7 10.d4 Nb6 11.Ra5 Ne4 12.Nbd2 Nd2 13.Nd2 Bd6 14.Qc2 f5 15.Rfa1 Rf6 (15...Qb8!?+=) 16.Ra7+– Ra7 17.Ra7 Bc6 18.b5 Bh2 (18...Qb8 19.Ra5 (worse 19.bc6 Qa7 20.c4 Bb4=+) 19...Bd7 20.Ba3+–) 19.Kf1 (better 19.Kh2!? Bb5 20.Bb5+–) 19...Qb8+– 20.Ra1 Be8 21.g3 c6 22.Kg2 Bg3 23.fg3 cb5 24.Nf3 Rg6 (better 24...Nc4!? 25.Bc4 bc4+–) 25.Ne5+– Rf6 26.Ba3 (26.Qb3 Nc4 27.Nc4 dc4=+) 26...Qc7 (26...Nc4 27.Bc4 bc4 28.Qb2+–) 27.Bb4 Bc6 28.Ba5 (28.Ba5 Qb7 29.Bb6 Qb6 30.Qa2+–) 1–0. pcmvr (2765) – croach (2325), net–chess.com, 2014.

8.0–0 d5 9.c4 dc4 10.Na3 Nd5 (10...Nbd7 11.Nc4 Nb6 12.Nb6 ab6 13.Ra8 Ba8 14.b5+=) 11.Nc4+= (worse is 11.Bc4 Nb6 12.Ra5 Nc6+=) 11...Bc6 12.Ra5 Bb4 13.Ra2 a5 (13...Bd7 14.Nce5+=) 14.Qa1 (better is 14.Qc2+/–) 14...Bb5? (better is 14...f6+=) 15.Bg7+– Re8 16.Qe5 f6?? (better is 16...Bf8 17.Bf8 Rf8+–) 17.Qg3 Kf7 (17...Qd7 18.Bf6 Kf8+–) 18.Nce5! Ke7 (18...fe5 19.Ne5 Double attack (19.Bb5 Discovered attack)) 19.Bf6! (19.Bf6 Nf6 20.Qg7 Kd6 21.Nf7 Kc5 22.Nd8+–) 1–0. marekt (2195) – zd3nik (1870), gameknot.com, 2014.

8.0–0 Nd5 9.Bc3=.

8.Nc3 c5 9.b5 a6=.

3.Nf3 Nc6

4.b5 Na5 5.Ra4 Nb7 6.Ba3 d6 7.Nc3 e6 8.e4 d5 (8...Ne7 9.Be2+–) 9.Bf8 Kf8 10.d4 de4 11.Ne4 h6 (11...Ne7!?+–) 12.Ne5+– Ne7 (12...Qd5 13.Nc3 Qd6 14.Qh5+–) 13.Qf3 Qe8 14.Rc4 c5? (14...Nd5 15.Nc3 c5 16.Ng6 (16.Nd5?! ed5 17.Qd5 f6+–) 16...Kg8 17.Nh8 cd4 18.Rd4 Kh8 19.Nd5 ed5 20.Be2+–) 15.Nc5 (better 15.bc6 f5 16.cb7 Bb7 17.Nd6 Bf3 18.Ne8 Ke8 19.Nf3+–) 15...Rb8 (15...f6 16.Nb7 Bb7 17.Qb7 fe5 18.de5+–) 16.Qf4 (better 16.Na6 Na5 17.Nb8 Nc4 18.Bc4 Kg8+–) 16...Nd6 (16...Nc5 A) 17.Rc5?! Rb7+–; B) 17.dc5?! Rb5 18.Rb4 Rb4 (worse 18...Rc5 19.Bb5 Rb5 20.Rb5+–) 19.Qb4 Qd8=; C) 17.Ng6 Ng6 18.Qb8+–) 17.Nf7 (better 17.Ng6! Ng6 18.Qd6 Ne7 19.Qb8 e5 20.de5 Ng6+–) 17...Nf7 (17...Qf7 18.Qd6 Rb5+–) 18.Qb8 a5 (18...Nd5 19.Ra4+–) 19.Ra4 (19.ba6!? Nc6 20.a7 Na7 21.Qa7 e5+–) 19...Nd8 (19...Qd8 20.b6 Qd6 21.Qd6 Nd6 22.Ra5+–) 20.Ra3 (20.Ra5 Nf7+–) 20...Kf7 (20...Qg6 21.Rf3 Kg8 22.Qc7+–) 21.Ra5 Kg6 (21...Rf8 22.Ra7 Kg8 23.Qc7+–) 22.Ra8 (better 22.Ra7 Kh7 23.Qc7 Nf5 24.Qc8 Rf8+–) 22...Kh7 23.Ra7 (better 23.Bd3 g6+–) 23...Nec6 (23...Rf8 24.Bd3 Kh8 25.Qc7+–) 24.Qa8 (better 24.Bd3 Kg8 25.bc6 Nc6 26.Qb5+–) 24...Na7 25.Bd3 g6 26.b6 (26.Qa7!? Qf7 27.Qf7 Nf7+–) 26...Nac6 27.Ne4 (27.Qc8!? Nd4 28.b7 N8c6 29.Qc7 Qe7 30.Qe7 Ne7+–) 27...Kg7 (27...Qe7 28.Qc8 Nd4 29.Qc7 Qc7 30.bc7+–) 28.Qc8 Nf7 (28...Nd4 29.Nc5+–) 29.Qb7 (29.Qe8 Re8 30.Kd2 Nd4+–) 29...Ne7 (29...Nd4 30.c3 Nb3 31.0–0+–) 30.c4 (30.0–0 e5 31.Nc5 Nf5+–) 30...Nd8 (30...Nf5 31.Nc5+–) 31.Qa7 (31.Qc7!? Nf7 32.b7 Nf5+–) 31...Ndc6 32.Qc7 (32.Qa1 Qb8 33.0–0 e5+–) 32...Qc8 (32...Qb8 33.Nc5 Rc8 34.Qb8 Rb8 35.b7 Nd4 36.Kd2+–) 33.Nc5 Qc7 34.Ne6 (34.bc7?! Nd4 35.Kd2 Rc8+–) 34...Kf6 35.Nc7 (35.bc7?! Ke6 36.d5 Kd7 37.dc6 Kc7+–) 35...Rb8 36.Kd2 Rb6 37.d5 Ne5 38.Re1 Rb2 39.Kc3 (better 39.Bc2 Nc4 40.Kc3 Rc2 41.Kc2 Kf7+–) 39...Rf2 (39...Nd3 40.Kd3 Rf2 41.d6+–) 40.Bb1 (40.Ne8 Kf7 41.Re5 Rg2+–) 40...Rg2 (40...Nd7 41.Re6 Kf7 42.d6+–) 41.Ne8 Kf7 42.Re5 Rh2 43.Nd6 Kf8 44.c5 (44.Re6 Rg2+–) 44...Rh3 (44...Rh1 45.Be4 Rc1 46.Kb4+–) 45.Bd3 g5 (45...Rh1 46.c6 Rc1 47.Bc2+–) 46.c6 g4 (46...Rh1 47.c7 Rg1 48.Kd4+–) 47.c7 g3 (47...h5 48.Nc4 Kf7+–) 48.Re7! Ke7 (48...Ke7 49.c8Q Combination) 49.c8Q Rh2 (49...Kd6 50.Qe6 Kc7 51.d6 Kc6 52.d7 Kc7 53.d8B Kd8 54.Qd6 Ke8 55.Bg6) 50.Qc7 Kf6 51.Ne8 Kg5 1–0. Panza (2685) – Tony _ R (1630), ChessWorld.net, 2016.

4.b5 Nb4 5.e4 e5 (5...d5!? 6.e5 Bf5+=) 6.c3+/– (6.Ne5?! Qe7 7.Bb2 d6+=) 6...Nf6 (better is 6...d5!? 7.cb4 de4+–) 7.cb4+– Bb4 8.Ra4 Bc5 (8...Qe7 9.Ne5! Bb7 10.f3+–) 9.Ne5 0–0 10.d4 Bd6 11.Bd3 c6 12.bc6 dc6 13.Nf3 Bg4 (13...Qe7 14.e5 Bb4 15.Bd2+–) 14.e5 Nd7 (14...Re8 15.0–0+–) 15.ed6 a5 (15...Re8 16.Be3+–) 16.0–0 Rb8 (16...Nb6 17.Ra2+–) 17.Nbd2 Nf6 18.Qc2 Qd6 (18...Rb4 19.Ne5 Bd7 20.Ndc4+–) 19.Ba3 Qd5 20.Ne5 Bh5 (20...c5 21.Bc5 Be6 22.Bc4+–) 21.Nc6 Rbc8 (21...Qe6 22.Bf8 Rf8 23.Ra5+–) 22.Ne7 Kh8 23.Nc8 Bg4 24.Bf8 Ng8 25.Nd6 g6 26.Qc7 Qe6 27.Nf7 Qf7 28.Qf7 Nh6 (28...Nf6 29.Bg7) 29.Bg7 1–0. michaelbuss – nh001, ChessWorld.net, 2009.

3.Nf3 d5

4.Ra4 Bd7 5.Ra1 e6 6.Bb2 Bb4?? 7.Bg7 Nf6 8.Bh8+–.

4.Bb2 e6 5.e3 Bb4?? 6.Bg7 Ba6 7.Ba6 Na6 8.Ra4+–.

4.Bb2 e6 5.e3 Bd7 6.Ne5 Bb4? 7.Nd7 Kd7 8.Bg7+–.

4.e3 Nc6 5.b5 Nb4? (better 5...Nb8+–) 6.c3+– Qd6 (6...a5+–) 7.Ba3 Nd3 (7...Nf6 8.Bb4 (worse 8.cb4 g6+–) 8...Qb6 9.Qa4+–) 8.Bd3 Bg4 (8...Qb6+–) 9.Bd6 cd6 10.b6 ab6 11.Ra4 Ra4 12.Qa4 (12.Qa4 Kd8 13.Nd4 h5 14.Qa8 Kd7 15.Qb7 Kd8 16.Qb8 Bc8 17.Ba6 e5 18.Nc6 Ke8 19.Qc8) 1–0. marekt – Catman Bazz, ChessWorld.net, 2018.

4.e3 e6 5.Ra4 c6 6.d4 Nf6 7.Bd3 (7...Bd6 8.Bd2). pierre (1765) – oasis, internet, 2006.

4.e3 Nf6 5.Ra4 Bd7 6.Ra1 e6. DeMaddin – mafergut, ChessWorld.net, 2003.

4.e3 Bd7

5.Bb2 e6

6.Ne5 Bb4? 7.Nd7 Kd7 8.Bg7+–.

6.Ne5 Qe7 7.b5 Qb4 8.Nd7 Qb2 9.Nf8 Qa1 10.Nh7 Rh7 –+.

6.Ne5 Qe7 7.b5 Qb4 8.Nd7 Nd7 9.Bc3 Qe4 10.Bd4.

3.Nf3 e5

3.Nf3 e6

4.Ra4 Bb7 5.e3 Nf6+=.

4.Ra4 d5 5.e3 c5 6.bc5 Bc5 7.Ba3 Bd7 8.Rg4 Ba3 9.Na3 g6 10.Qa1 Nf6?? (better is 10...f6) 11.Rf4+– e5 (11...Nc6 12.Rf6 d4+–) 12.Qe5 Qe7 13.Rf6 Nc6 (13...Qe5 14.Ne5 Be6+–) 14.Rc6! Qe5 (14...Bc6 15.Qh8) 15.Ne5 Bc6 16.Nc6 a5 17.c4 dc4 18.Nc4 a4 19.Nb6 Ra6 (19...a3 20.Bb5 a2+–) 20.Ba6 (20...h5 21.Ke2+–) 1–0. orane (2210) – Crazypawn, Live Game Caissa's Web, 2004.

4.Ra4 d5 5.e3 Bd7 6.b5 a6 7.Ne5+= Nf6 8.Bb2 Ng8? (better is 8...a5+=) 9.Nf7!+– (9.Nd7?! Qd7 10.c4 a5+/–) 9...Kf7 Decoy theme: f7 10.Qh5 Ke7?? (10...g6 11.Qf3 Nf6 12.Bf6 Qf6+–) 11.Ba3 Kf6 (11...c5 12.bc6 Kf6 13.Rf4) 12.Rf4 1–0. pierred (2595) – eduardobandeira (2100), net–chess.com, 2008.

4.Bb2 Bb4?? 5.Bg7 d5 6.Bh8+–.

4.Bb2 Nc6 5.b5 Rb8=.

4.c3 a5 5.Ra4 (5.Qa4 Nf6+=) 5...Bb7= 6.Ra5 Ra5 7.ba5 Nc6 8.Na3 Na5 9.Qa4 c5 10.Nb5 Nf6 11.e3 Be7 12.Be2 0–0 13.0–0 Qb6 14.Ba3 Ra8 15.Rb1 Bd5 16.Qc2 (16.Qf4 Qb8=) 16...Bb3 17.Qb2 (17.Qc1 Ne4=) 17...d6=+ 18.Qc1 (18.h4 Nd7=+) 18...Ba2 19.Rb2 Bc4 20.Qf1 d5 21.Ne5 Be2 22.Qe2 Nc6 23.Nc6 Qc6 24.f3 Nd7 25.h3 (25.e4 de4 26.Qe4 Qe4 27.fe4 Ne5=+) 25...Nb6–/+ 26.e4 (26.Nd4 Qd6 27.Nc2 Nc4–+) 26...Bf8 27.Rb1 Nc4 28.Bc1 Ra2 29.f4 0–1. Pierre – Nainir, internet, 2019.

4.c3 Bb7 5.d3 Qf6 (5...c5 6.b5= (< 6.Ra4 cb4 7.cb4 Bc6=+)) 6.Bg5 Qf5 (6...Qg6 7.e4) 7.e4 Qg6 8.Qa4 Be7 9.Be7 Ne7 10.Qa5 Na6 (better is 10...Qh6!?) 11.Nbd2 0–0–0? (better is 11...c6 12.d4 Nb8) 12.Qb5 c6 13.Qa5 d5 (13...Nc7 14.Qa7 Nb5 15.Qc5+–) 14.d4 Nc7 15.Qc5 de4 16.Ne5 (16.Qe7 ef3 17.Nf3 Nd5) 16...Qf6 17.Ra7 (17.Ne4 Qf4 18.Nd6 Rd6 19.Qd6 Qe4 20.Kd2 Qf4 21.Kd1 Ned5+–) 17...e3 18.Ne4 (18.fe3 Ncd5 19.e4 Ne3+–) 18...ef2 19.Kd1 Qf5 (19...Rd5 20.Nf6 Rc5 21.bc5 gf6 22.Nf7 Kb8 23.Rb7 Kb7 24.Nh8 Ned5+–) 20.Qb6 (20.Qe7 Qe4 21.Nf7 Qb1 22.Kd2 Qb2 23.Kd3 Qb1 24.Kc4 Ba6 25.Kc5 Qf5 26.Ne5 Bb7 27.Qg7 Rhf8) 20...Rd4 (20...Qh5 21.Kc1 Qe5 22.de5 Ned5 23.Qb7 Kd7 24.Nc5 Ke7 25.Qc6 h6+–) 21.cd4 Kd8 22.Rb7 Qh5 23.Kd2 Qe5 24.de5 Ned5 (24...Kd7 25.Qc7 Ke8 26.Qe7) 25.Qc6 Kc8 26.Nc5 Rd8 27.Rb8! Kb8 28.Qb7 1–0. Hanison,Bernard – Valica,Slavo, b2–b4.com, 2004.

4.c3 Bd6 5.Na3 Ba6 6.Qa4 (6.d3 Qf6 7.d4 Qf5 8.g3 Nf6 9.Bg2; 6.d4 Nf6 7.Qa4 Be7 8.Bg5 Bb7 9.e3) 6...c6 (6...Nf6 7.d3+= Nd5 8.Qb3 Qf6 9.d4) 7.g3 (7.d3 Nf6+= (7...c5 8.Nc4 Bc4 9.bc5) 8.e4 Qc7 9.Bg5) 7...Qb6 (7...Nf6 8.Bg2+= Be7 9.d3) 8.Bg2 (8.d3 Ne7 9.Bg2) 8...Ne7 (8...Nf6 9.d3) 9.d3 Nd5 10.Bd2 0–0 (10...Be7 11.e4 Nc7 12.Nc4 Bc4 13.dc4+/–) 11.Nc4 Qc7 12.Nd6 Qd6 13.Qa5 Qe7 (13...Bb7 14.c4 Nf6 15.Bf4+/–) 14.c4+– Nf6 (14...Nb6 15.Bf4 d6 16.c5+/–) 15.b5 cb5 (15...Bc8 16.Ne5 d5 17.bc6+–) 16.Ne5 (worse is 16.cb5 Bb7+/–) 16...Ng4?? (16...d5 17.cb5 Bc8+–) 17.Ng4 d5 18.Bb4 Qd7 1–0. henryk88 – dmamic, IECG, 2008.

4.e3 Bb4 5.Bb5 a3 6.Na3 Ba3 7.Ba3 c6 8.Ba4 Nf6 9.0–0 Ba6 10.d3 Nd5 11.Qd2 Qf6 12.Bd6 Bb5 13.Bb5 cb5 14.Rfb1 a6 15.Rb5?? Qa1 16.Qe1 Qe1 17.Ne1 ab5 18.e4 Nc3 19.f4 Nc6 20.e5 f5 21.Kf2 Ra1 0–1. Trkn – Bob Milkint, itsyourturn.com, 2000.

3.Nf3 Nf6

4.Ra4 e6 5.Nc3+=.

4.Bb2 (--> 2.Bb2 Nf6 3.a4 ba4 4.Nf3).

4.Bb2 Bb7 5.Nc3 e6 6.Ra4 (--> 2.Bb2 Nf6 3.a4 ba4 4.Nf3 e6 5.Ra4 Bb7 6.Nc3).

4.c3 Bb7 5.Qa4 Bd5 6.d4=.

4.c3 Bb7 5.Qa4 e6 6.d4 Be7 7.Nbd2 (7.Bf4 0–0=) 7...0–0 8.Qc2 a5 (8...d5!?=) 9.ba5 c5 10.e4 (10.Nc4 Nc6) 10...cd4 (10...Ra5 11.Rb1 Bc6 12.Bd3=) 11.cd4 (11.e5 dc3 12.Qc3 Nd5=) 11...Ra5= 12.Rb1 Ba6 13.Ba6 Ra6 14.Qd3 Rb6 (14...Ra2 15.0–0=) 15.0–0 (15.Rb6 Qb6 16.Nc4 Qc6=+) 15...Rb1= 16.Nb1 Nc6 (16...d5 17.e5 Ne4 18.Nbd2=) 17.Bg5 (17.Ne5 Nb4 18.Qf3 d5=+) 17...d5 18.e5 (18.Bf6 Bf6 19.e5 Nb4=) 18...Ne4 19.Be7 Qe7 20.Nbd2 Nd2 ½–½. Conde,Jose A – Fournier,Frederic, TT–06 TSC, 2003.

4.c3 Bb7 5.Ra4 Bc6 6.Ra3=.

4.c3 e6 5.Qa4 Bb7 6.d4 Be7 7.Nbd2 (7.Bf4 0–0=) 7...0–0 8.Qc2 a5 (8...d5 9.Ne5=) 9.ba5 c5 (9...Nc6 10.Nc4) 10.e4 (10.Nc4 Nc6 11.Qa4 cd4 12.Nd4 Ra6=) 10...cd4 (10...Ra5 11.Ra5 Qa5 12.Bd3=) 11.cd4 (11.e5 dc3 12.Nc4 Nd5=) 11...Ra5= 12.Rb1 Ba6 13.Ba6 Na6 14.Qc3 (14.0–0 d5 15.Nb3 Nb4=+) 14...Ra4 (14...d5 15.e5 Ne4 16.Ne4 de4 17.Bd2–+) 15.0–0 Qa8 (15...d5 16.Qc2 Ra5 17.Nb3=+) 16.Qe3 (16.Qc2 Nb4 17.Qd1 d5= (17...Ne4? 18.Ne4 Qe4 19.Bg5 Bg5 20.Qa4+–)) 16...Rb8 17.Rb8 Nb8 18.Bb2 (18.Ne5 d5=) 18...d5 19.e5 Nfd7 (19...Ng4 20.Qf4 Nh6 21.Rb1=) 20.Rb1 Ra2 ½–½. Schulz,Hans_Juergen – Fournier,Frederic, TT–06 TSC, 2003.

4.c4 Bb7 5.Ra4 d5 6.cd5 Nd5 7.b5 Nb6 8.Rd4 N8d7 9.e4 (9.Bb2!?=) 9...e6 10.Ba3 Ba3 11.Na3 Qe7 12.Nc2 e5 13.Rb4 Nc5 14.Qe2 (14.d3 0–0–/+) 14...a5 15.ba6 Ba6 16.Qe3 Bf1 17.Kf1 Ra2 18.Qc3 0–0 19.Ne3 Rfa8 20.Ke2 (20.g3!? Nbd7 21.Kg2 Qf8–/+) 20...Ne6 21.Rd1 R2a3 22.Nf5 Qf8 23.Rb3 Na4 24.Qc2 Rb3 25.Qb3 g6 26.Ng3 Nac5 27.Qc3 Qd6 28.h4 (better is 28.Kf1!? Qd3 29.Kg1–/+) 28...Nd3 29.Rb1 (29.Ra1 Ra1 30.Qa1–+) 29...Ra3 30.Rb8 (30.Qc2 Qa6 31.Kd1–+) 30...Kg7 31.Qc2 (31.Kf1 Rc3 32.dc3–+) 31...Nef4 32.Kd1 Ra1 33.Rb1 Qa6 34.Nd4 Rb1 35.Qb1 ed4 36.Qd3 (36.Nf5 gf5 37.Qd3 Qd3 38.Kc1 Qc4 39.Kb1 Qb3 40.Ka1 Nd3 41.e5 Qb2 36...Qd3 37.Kc1 (37.Nf5 gf5 38.Kc1 Qc4 39.Kb1 Qb3 40.Ka1 Nd3 41.e5 Qb2 37...Qc4 38.Kb1 Qb3 39.Ka1 Nd3 40.Nh5 gh5 41.g4 (41.e5 Qb2 41...Qb2 0–1. Caissa – orane, internet, 2003.

4.c4 e6 5.Ra4 a6 6.Bb2=.

4.d4 Bb7 5.Ra4 Be4 (5...Nd5 6.Ra1+=) 6.e3 (6.Nc3 e6+–) 6...e6 7.Nbd2 Bg6 (7...Nc6 8.c3 Bf5 9.Ba6+=) 8.c3+– Be7 (8...Nc6 9.Be2+–) 9.Ne5 0–0 10.Ng6 hg6 11.Qf3 (11.Bd3 d5+–) 11...d5 1–0. Bazza3 – knightour64, ChessWorld.net, 2018.

4.e3 c6 5.c3 a6 6.d4 e6 7.Qa4 Bd6 8.Nbd2 Bb7 9.e4 0–0?? (better is 9...Bc7 10.e5 Nd5+–) 10.e5 Be5 (10...a5 11.ba5 (11.ed6?! ab4 12.Qa8 Ba8 13.Ra8 bc3+=) 11...Bc7 12.Qb4+– (12.ef6?! Ra5 13.fg7 Kg7=)) 11.de5 (worse is 11.Ne5 d6 12.Nec4 d5+–) 11...Nd5 12.Ne4 h6 (12...Qc7 13.Qa5 c5 14.Nc5+–) 13.Nd6 Qc7 14.c4 Nc3 (14...a5 15.ba5 Ne7 16.Rb1+–) 15.Qa5 Qa5 16.ba5 Bc8 17.Be3 g5 (17...Nb5 18.cb5 cb5 19.Bd3+–) 18.Kd2 Nb5 19.cb5 cb5 20.h4 g4 21.Bh6 Rd8 (21...Nc6+–) 22.Nh2 Nc6 23.Ng4 Nd4 (23...Ne5 24.Nf6 Kh8 25.Re1 Re8 26.Nde8 Nc4 27.Bc4 bc4 28.Bg7) 24.Nf6 Kh8 25.Nf7 1–0. aspasio – valerypavlovich (2100), net–chess.com, 2015.

4.e3 e6 5.Ra4 Be7 6.Bb2 d5 7.c4 c5? (better is 7...0–0!?=) 8.bc5+/– Bd7 9.Ra2 Bc5 10.d4 (10.cd5!? ed5 11.Qc2+/–) 10...Bb4+= ½–½. Hain,Anthony (1925) – Chan,Anthony, Oceania Zonal, 2015. (=1.Nf3 Nf6 2.b4 b5 3.a4 ba4)

4.Ra4 Bb7

5.Nc3 e6 6.Bb2 (--> 2.Bb2 Nf6 3.a4 ba4 4.Nf3 e6 5.Ra4 Bb7 6.Nc3).

5.e3 Nc6 6.b5 Nb8 7.Bb2 e6 8.Nc3 Be7 9.Qa1 Nd5 (better 9...Bf3!? 10.gf3 d5+=) 10.Nd5+– Bd5 11.Bg7 Rg8 12.Bd3 Bf3 13.gf3 f5 14.e4 fe4? (14...c6 15.ef5 cb5+–) 15.Be4 (15.fe4?! Bc5 16.Qe5 Bf2 17.Kf2 Qh4 18.Kf3 Qh3 19.Qg3 Qg3 20.hg3 Rg7+–) 15...d5 16.Bh7 Rg7 17.Qg7 Kd7 (17...Qd6 18.Bg6 Kd7 19.f4+–) 18.0–0 (better 18.Bg8!? Qf8 19.Qf8 Bf8+–) 18...c6 19.Bd3 Qf8 (19...Qb6 20.Rb1 c5 21.Re1+–) 20.Qg4 (better 20.Qf8 Bf8 21.b6 a5+–) 20...a6 (20...Qf7+–) 21.Re1 Kc7 22.Rf4 Qe8 (22...Qd8 23.Qe6 Bd6 24.Rf7 Kb6 25.ba6 Qg5 26.Kh1 Bh2 27.Rb1 Kc5 28.Rfb7 Qg2 29.Kg2 Bf4 30.R7b5 cb5 31.Rb5 Kd4 32.Qd5) 23.Qe6 ab5 24.Rf7 (24.Rf7 Kb6 25.Re7+–) 1–0. pierred (2800) – fishmooney (2140), net–chess.com, 2016.

5.e3 e6 6.Bb2 Be7 7.Be2 0–0 8.0–0 d5 9.d4 Nbd7 10.c3 Ne4 11.Nbd2 Nb6 12.Ra1 a6 13.Re1 f5 14.Nb3 Nc4 15.Bc4 dc4 16.Na5 Bd5 17.Qe2 Nd6 18.Ne5 1–0. asoka (2500) – ramoschessbrasil (2480), net–chess.com, 2011.

4.Ra4 d5

5.Bb2 Bd7 6.Ra5 e5 7.Be5 Bb4 8.Bf6 Qf6 9.Rd5 0–0=.

5.e3 Bb7 6.Nc3 e6 7.Ba3 Bd6 1–0. pcmvr (2850) – ramoschessbrasil (2480), net–chess.com, 2011.

5.e3 Bd7 6.b5 e6 7.Ne5 Bd6 8.Bb2 0–0 9.Na3 Ne4 10.Bd3 Nc5?? (better is 10...a6=) 11.Bh7!+– (11.Nd7 Na4 (11...Ncd7? 12.Bh7 Kh7 13.Qh5 Kg8 14.Bg7+/–; 11...Nbd7 12.Bh7 Kh7 13.Qh5 Kg8 14.Bg7+/–; 11...Qd7 12.Bh7 Kh7 13.Rh4 Kg8 14.Bf6 Ne4 15.Qh5 Nf6 16.Qh8) 12.Bf6 Nd7 13.Bd8 Rfd8+/–) 11...Kh7 12.Qh5 Kg8 13.Rh4 Re8 1–0. marekt – zucchini, ChessWorld.net, 2015.

2.a4 a5

3.ab5 Bb7 4.ba5 h5 5.Bb2 Nf6 6.e3 c6 (6...d6 7.a6 Bc8 8.Bf6 ef6 9.Be2+–) 7.a6 Bc8 8.a7 cb5 9.ab8Q Rb8 10.Nc3 e6 (10...b4 11.Nb5+–) 11.Nb5 Rb5 (11...Bb7+–) 12.Bb5 Be7 1–0. marekt – mightyatom_1, ChessWorld.net, 2012.

3.c4 bc4 4.ba5 Nf6 5.Nf3+=.

3.c4 c5 4.d4 (4.ab5 cb4 5.d4+=) 4...d5?? (4...ab4 5.cb5 c4 6.e4=) 5.e4 (5.ab5 cb4 6.c5 Nd7+/–) 5...e5 (5...ab4 6.cb5 c4 7.ed5 Qd5 8.Be2=) 6.f4 f5 7.g4?? 8.h4?? h5 9.Rh3?? Rh6 ½–½. Brardt,Dennis – Kahlert,Philipp, Schleswig Holstein–ch U12, 2001. (=1.a4 a5 2.b4 b5)

3.h4 h5 4.c4 c5 5.d4 d5 6.e4 e5 7.f4 f5 8.g4 g5 9.dc5 fe4 10.Qd5 Qd5 11.cd5 ef4 (better is 11...gf4!? 12.Bb5 Kd8+/–) 12.Bb5 Kd8 13.ba5?? (better is 13.hg5 Bg7 14.Ra2 Bg4 15.Bf4 ab4 16.c6+–) 13...hg4+= (worse is 13...Bc5 14.hg5 f3 15.Nf3 ef3 16.gh5+/–) 14.h5 (better is 14.d6!? Bg7 15.Ra2+=) 14...Bc5–+ 15.Ne2 Nf6 (15...g3 16.Ng3 fg3 17.Bg5 Ne7 18.Ra2–+) 16.Nbc3? (better is 16.Bb2 Bb4 17.Nd2–/+) 16...e3–+ (worse is 16...Ra5 17.h6–+) 17.Ba3 Ba3 18.Ra3 f3 (better is 18...g3 19.0–0 Bh3 20.Nf4 gf4 21.Rf4 Nh5–+) 19.Ng3–/+ Bb7 20.Bc6?? (better is 20.h6–/+) 20...Nc6–+ 21.dc6 Bc6 22.Rb3 (22.Rh2–+) 22...f2 23.Ke2 Bh1 24.Nh1 Rh5 (24...Rh5 25.Nf2 ef2 26.Kf2 Rh3–+) 0–1. alfredalfred – willitheblitzer (2150), gameknot.com, 2014. (=1.a4 a5 2.b4 b5)

3.ab5 a4

4.Bb2 Bb7 (4...d5 5.c3+–) 5.c4+– d5 (5...Nf6 6.Ra4 Ra4 7.Qa4+–) 6.Ra4 (6.c5!? d4+–) 6...dc4+– 7.Ra8 Ba8 8.Nf3 Nf6 9.e3 e6 10.Bc4 Bb4 11.Qa4 (better 11.0–0+–) 11...0–0?? (better 11...Bf3 12.gf3 Bd6+–) 12.Qb4 (12.Qa8 Re8+–) 12...c6 13.bc6 (13.b6 Bb7+–) 13...Nc6 14.Qc3 Ne4 (14...Qb6 15.0–0 Rb8+–) 15.Qg7 1–0. sirgeshdb – chessobert (1870), lichess.org, 2020.

4.c3 e5 5.Ra4 Ra4 6.Qa4 Bb7 7.f3 (7.d3 Nf6+–) 7...Bd6 (7...d5 8.d3+–) 8.Qa7 Bd5 9.Nh3 Nf6 (9...Be7 10.d4 ed4 11.Nf4 Bh4 12.g3+–) 10.d3 0–0 (10...h6 11.e4 Be6 12.Nf2+–) 11.Bg5 (11.e4!? Be6+–) 11...Be7 12.e4 Be6 13.Nf2 Nh5 (13...h6 14.Be3+–) 14.Be3 (14.Be7 Qe7 15.g4 Qg5+–) 14...Bg5 15.Nd2 d6 16.g3 Be3 17.Qe3 Nd7 18.Bg2 Qa8 19.0–0 Qa2 (19...Qa3 20.Nd1+–) 20.Rb1 Ra8 21.Qe1 (21.d4 ed4 22.cd4 Ra3+–) 21...Nb6 22.c4 Na4 23.Nd1 Qa3 24.Bf1 Nc3 25.Rb3 (better 25.Nc3 Qc3 26.Nb3 Qe1 27.Re1+–) 25...Qa4?? (better 25...Qa7 26.Nf2 Na2+–) 26.Nc3+– (worse 26.Rc3 Qb4 27.Rb3 Qa5+–) 26...Qa7 27.Kh1 (27.Qf2 h6+–) 27...Qb6 28.Rb1 Ra3 29.Nb3 Ra8 30.Na5 Rf8 (30...Nf6 31.Ra1+–) 31.Nc6 f5 (31...Ra8 32.Ra1 Qb7 33.Nd5 Bd5 34.Ne7 Kf8 35.Nd5+– (35.cd5?! Ke7 36.Ra5 Kf8+–)) 32.Bh3 Rf6 (32...Nf6 33.Ra1 Kh8 34.Ra7 fe4 35.Be6 ef3 36.c5 dc5 37.Ra6+–) 33.ef5 Bf5 (33...Bd7 34.Nd5 Qb7 35.d4+–) 34.Bf5 Rh6 (34...Rf5 35.Nd5 Qb7 36.Nde7 Kh8 37.Nf5+–) 35.d4 (35.Ra1 g6 36.c5 gf5 37.cb6 cb6 38.Ne7 Kf8 39.Nf5 Nf4 40.Ra8 Kf7 41.Nh6 Ke7 42.Ra7 Kd8 43.Qe4 d5 44.Qe5 Nd3 45.Qh8) 35...ed4 36.Qe8 1–0. s_t_a_r_p_t (1960) – hollcana, gameknot.com, 2019.

4.c3 Nf6+/–.

4.c4 c5 5.bc5 Qa5 (5...e5 6.d4+–) 6.e3 (6.Nc3!? Qc7 7.d4 Bb7+–) 6...Qb4 7.Qf3 Ra7 8.Ba3 Qb3 9.Ne2 Bb7 (9...Qc2+–) 10.Qg3 Qc4 (10...Nc6 11.Nd4 Nd8+–) 11.Qb8 (11...Bc8 12.Qc8) 1–0. miehnekort – ibuynsellhome2, Yahoo, 2005.

4.c4 d5!?+/–.

4.c4 d6 5.Ra4 Ra4 6.Qa4 Bd7 7.d4 Nf6 8.Nc3 h5 9.e3 h4 10.Nf3 Ng4 11.Be2 Qc8 12.0–0 Na6 13.Qa6 Qd8 14.Nd5 Rh6 15.Qb7 e6 16.Nc7 Ke7 17.e4 h3 18.Bh6 gh6 19.Ra1 Kf6 20.Ra8 Qe7 21.gh3 Nh2 22.Nh2 d5 23.e5 Kg6 24.cd5 Qg5 25.Ng4 Qc1 26.Kg2 Bb4 27.Rg8 Kh7 28.Qb8 Qf4 29.Rh8 Kg6 30.Qg8 Kh5 31.Nh6 Kh4 32.Nf7 1–0. Trkn – James, itsyourturn.com, 2000.

4.c4 e5 5.Ra4 Ra4 6.Qa4 c5? (6...d6+–) 7.Qa7 cb4 (7...Bd6 8.bc5 Qc7 9.b6 Qc5 10.b7 Qc4 11.Nc3 Bb7 12.Qb7+–) 8.Qb8 Nf6 (8...d6 9.d3+–) 9.Qe5 Be7 10.d3 Qa5 (10...0–0 11.Nf3+–) 11.Nf3 b3 (11...d6 12.Qb2 d5 13.Nd4 dc4 14.dc4+–) 12.Nbd2 d6 (12...d5 13.cd5 Qb4 14.d6 Qd6 15.Qd6 Bd6 16.Nb3+–) 13.Qb2 Qa2 (13...0–0 14.Qa3 Qa3 15.Ba3+–) 14.Nb3 Qb2 15.Bb2 0–0 (15...Bd7 16.Nfd4+–) 16.g3 d5 (16...Bd7 17.Bg2+–) 17.c5 Be6 (17...Ng4 18.Bg2 Be6 19.Nfd4+–) 18.Bd4 Ra8 (18...Rc8 19.Bg2+–) 19.b6 Ra3 20.Nfd2 Nd7 21.b7 Bd8 22.Bg2 Ba5 (22...Bc7+–) 23.Na5 Ra5 24.c6 (24.c6 Nf8 25.b8Q+–) 1–0. Janek – Vindo, internet, 2018.

4.c4 e5 5.Ra4 Bb7 6.Ra8 Ba8 7.Qa4 Be4 (7...Bb7 8.Nf3+–) 8.Nc3 Nf6 (8...Bb7 9.Nf3+–) 9.Ne4 Ne4 10.Nf3 f5 (10...c6 11.d3 Nf6 12.Ne5+–) 11.Ne5 d5 (11...Qf6 12.Bb2 Be7+–) 12.b6 c6 13.Nc6 Nc6 14.Qc6 Qd7 (14...Kf7 15.f3 Nf6 16.c5+–) 15.Qa8 Qd8 16.b7 Bd6 17.c5 Be5 (17...Bb8 18.f3 Ng5 19.e3+–) 18.Bb2! 0–0 (18...Bb2 19.Qd8 Double attack) 19.Qd8 Rd8 20.Be5 Ng5 21.c6 Ne6 22.g4! 1–0. Janek – Obotty, internet, 2019.

4.c4 g6 5.Ra4 Ra4 6.Qa4 c6?? (better 6...Bb7+–) 7.Qa7 1–0. DEFFM – NZAXQRMPHKJ, freechess.org, 2017.

4.c4 g6 5.Bb2+– Nf6 6.e4! e6 (6...Ne4 7.Bh8) 7.Qf3 (better is 7.e5 Ne4 8.Ra4 Ra4 9.Qa4 Nf2 10.Kf2 Qh4 11.g3+–) 7...Bb7?? (better is 7...Bg7+/–) 8.Bf6+– Be4 9.Qc3 (better is 9.Qf4 g5 10.Bg5+–) 9...Qf6 (9...Bb4 10.Bd8 Bc3 11.Nc3 Kd8 12.Ne4 a3+–) 10.Qf6 Rg8 11.Nc3 Bc2 12.Qf4 Bd6 13.Qf3 c6 14.bc6 Nc6 (14...dc6 15.b5+–) 15.b5 Rc8 16.bc6 Rc6 17.Na4 Be5 18.Nc3 Ke7 19.Ra7 Bd4 20.Rd7! Kd7 21.Qf7 Kd6 22.Nb5 Kc5 (22...Ke5 23.Nf3 Ke4 24.Ng5 Ke5 25.f4) 23.Qe7 Kb6 24.Qa7 1–0. Taulien,Hans_Juergen – Lausch,Axel, remoteschach.de, 2002.

4.c4 g6 5.Nc3 Bg7 6.Ra4 Bc3?? (better 6...Ra4 7.Qa4 Bb7+–) 7.Ra8 (7.dc3?! Ra4 8.Qa4 Bb7+–) 7...Bb7 8.Ra7 Qc8 (8...Bd4 9.Rb7 Qc8 10.Rb8 Qb8 11.Nf3+–) 9.dc3 c5 (9...h6 10.c5+–) 10.bc5 Nf6 (10...h6 11.Qd4 Rh7 12.Bf4+–) 11.Ba3 (better 11.f3 0–0+–) 11...d5 (11...Kf8 12.f3+–) 12.c6 Bc6 13.Re7 Kd8 14.Qd4 Nbd7 15.Rd7! Bd7 (15...Bd7 16.Qb6 Double attack (16.Qf6 Remove defender); 15...Qd7 16.Qf6 Double attack (16.Qf6 Remove defender; 16.bc6 Zwischenzug); 15...Kd7 16.Qf6 Remove defender (16.bc6 Zwischenzug); 15...Nd7 16.Qh8 Double attack (16.Qh8 Pinning; 16.Qh8 Deflection; 16.bc6 Zwischenzug)) 16.Qf6 Kc7 17.Qd6 Kd8 18.Bc5 Re8 19.Qf6 Re7 20.Qe7 Kc7 21.Qd6 Kd8 22.Qf6 (22.Qf6 Ke8 23.Qe7) 1–0. michaelbuss (2850) – Mick475273, ChessWorld.net, 2009.

4.e3 c6 5.c4 (5.c3 Nf6+–) 5...e6 (5...cb5 6.cb5 e5 7.Bb2+/–) 6.bc6 (6.Ra4 Ra4 7.Qa4 cb5 8.Qb5 Ba6+–) 6...Nc6 (6...Bb4!? 7.Ra4 Ra4 8.Qa4 Nc6+/–) 7.b5+– (7.Ra4?! Ra4 8.Qa4 Bb4+/–) 7...Nb4 8.Ra4 Bb7 9.Rb4?? (better is 9.Ra8 Qa8 10.f3+–) 9...Bb4= 10.Nf3 Ra1?? (better is 10...d5=) 11.Bb2+– Ra2?? (11...Rb1 12.Qb1 f6+–) 12.Bg7 Qa5 13.Bh8 (better is 13.Bd3+–) 13...Bd2 (13...Be4 14.Be2 Bb1 15.Qb1 Bd2 16.Kf1 Ne7+–) 14.Nfd2 Ra1 (14...d6 15.Bd3+–) 15.Bd3 (15.Ba1 Qa1 16.Nb3 Qb2+–) 15...Qa2 (15...Ra2 16.0–0+–) 16.0–0 Qa8 17.Ba1 Bg2 18.Nc3 (better is 18.Qg4 Ne7 19.Qg7 d6+–) 18...Bh1 19.f3 d6 20.Kh1 Nf6 21.Kg2 (21…Qb8 22.Nce4 Ne4 23.Ne4+–; better is 21.Nde4 Ne4 22.Ne4 Kf8+–) 1–0. kamera – yossi_e, GameColony.com, 2002.

4.e3 d5 5.c3–/+.

3.ab5 ab4??

4.Ra8 Ba6 5.ba6 Qc8 6.a7 (6.a7 e6 7.Rb8+–) 1–0. GuestQSVZ – GuestYXQF, freechess.org, 2018.

4.Ra8 Bb7 5.Ra7 Qc8 6.e3 e5 (6...e6 7.Bb2+–) 7.Bb2 d6 8.d4 Be7 (8...Nd7 9.Ra4+–) 9.de5 de5 10.Qh5 (better 10.Be5 Nf6+–) 10...e4 (10...Nd7+–) 11.Bg7 Nf6 12.Bf6 (better 12.Qh3!? Rg8 13.Qc8 Bc8 14.Bf6 Bf6+–) 12...Bf6 13.Qh3 (better 13.Bc4!? 0–0+–) 13...Nd7 14.Ne2 (14.Bc4 h6+–) 14...Be5 (14...Qb8 15.Ra5+–) 15.g3 (15.Nd4 Bd6+–) 15...Bd5 (15...Qb8 16.Ra5+–) 16.Nd4 Qb8 (16...Nb6 17.Qh6 Qd8 18.Nd2+–) 17.Ra4 (17.Nc6 Bc6 18.bc6 Nc5+–) 17...Bd6 (17...Nb6 18.Qf5 c5 19.bc6 Na4 20.Qd7 Kf8 21.Qd5+–) 18.Be2 (18.Qf5 Qb7+–) 18...Rg8 (18...Qb7 19.Qh6+–) 19.0–0 (better 19.c4 Bb7+–) 19...Ke7 (19...Nf6 20.c4 Bb7 21.Nf5+–) 20.Nd2 (better 20.Bc4 Bb7 21.Nf5 Ke8 22.Bf7 Kf7 23.Nd6 cd6 24.Qd7 Kg6 25.Rb4 Bc8+–) 20...Rg7 (20...Ke8+–) 21.Nf5 Kf8 22.Ng7 Kg7 23.Qd7 Be6 24.Qc6 Bf5 25.Nc4 Qd8 26.Nd6 cd6 27.Ra8 (27.Ra8 Qd7 28.Qd7 Bd7 29.Rd8+–) 1–0. jaddwarrior (1715) – RobertOConnor, ChessWorld.net, 2013.

3.ab5 c5?

4.bc5+– a4 5.c4 e5 6.Ra4 (6.d4!? Bb7+–) 6...Ra4 7.Qa4 Bc5 8.Nf3 (better 8.Ba3 d6 9.Bc5 dc5 10.Nf3+–) 8...Ne7? (better 8...Qb6 9.e3 e4+–) 9.Ne5 Qb6 (9...d6 10.Nd3+–) 10.e3 d5 (10...d6 11.Nf3 Bf5 12.Nc3+–) 11.cd5 (11.d4!? Bd4 12.ed4 Qd4+–) 11...Nd5 12.Bc4 (better 12.d4 Be7 13.Ba3+–) 12...0–0 (12...Be6+–) 13.Bd5 Rd8 (13...Qd6 14.Qe4 Bf5 15.Qf5 Qd5 16.e4+–) 14.Bf7 Kf8 15.d4 (better 15.Ba3 Be7+–) 15...Nd7 (15...Be7 16.Ba3 Bb7+–) 16.dc5 Qc5 17.Ba3 Qa3 18.Qa3 Nc5 19.Qc5 Rd6 20.Qd6 1–0. DEFFM – GuestJWTS, freechess.org, 2018.

4.bc5+– d5 5.c6 (5.Nf3 e5 6.c6 Bd6+–) 5...e6 (5...e5 6.Nf3+–) 6.Nf3 Nh6 (6...Nf6 7.Nc3+–) 7.Nc3 (better is 7.e3 Bc5+–) 7...Nc6 (7...Bd6 8.e3+–) 8.bc6 a4 (8...Ba6 9.e4 de4 10.Ne4 Bf1 11.Kf1+–) 9.e3 a3 (9...Bd6 10.Bb2+–) 10.Nb5 a2 (10...Qb6 11.Na3 Nf5 12.Nc4 Qc6 13.Nce5+–) 11.c7 (11.c7 Qd7 12.Bb2+–) 1–0. pierre – pocc, internet, 2010.

4.bc5+– e5 5.d4 d5 (5...ed4 6.Qd4 Bb7+–) 6.Bd2 (better 6.e3+–) 6...ed4+– 7.Ba5?? (better 7.Bb4! Bd7 8.Qd3+–) 7...Ra5–+ 8.Na3?? (8.Qd4 Nf6 9.Ra5 Qa5 10.Nd2 Bc5 11.Qe5 Kd8 12.e3–+) 8...Bc5 9.Qd3 Ne7 10.Nf3 (10.Kd1 Qd6–+) 10...Bf5 11.Qb3 0–0 (better 11...Qd6 12.Kd1–+) 12.Ne5 (12.Ra2–+) 12...Qd6 13.Nd3 (13.Nf3 Ba3 14.Kd1 Qc5–+) 13...Ba3 14.Rb1 (14.Kd1 Rc8–+) 14...Nd7 (14...Rc8 15.Kd1–+) 15.c3 (15.g4 Rc8 16.gf5 Rc3–+) 15...Rb8 (better 15...Nc5 16.Qc2–+) 16.c4 (16.cd4 Rab5 17.Qb5 Rb5 18.Rb5–+) 16...Nc5 17.Qc2 Be6 (better 17...dc4 18.Qc4 Rc8 19.Kd1–+) 18.Qd2 Ra4 19.Nb4 (19.Qd1 Nd3 20.ed3 Bb4 21.Rb4 Qb4 22.Qd2 Ra1 23.Ke2 Qd2 24.Kd2–+) 19...dc4 (better 19...Bb4 20.Qb4 Rb4 21.Rd1–+) 20.e4 Rb5 (better 20...Ne4 21.Nd3 Nd2 22.Kd2 c3 23.Kd1 Bg4 24.Be2–+) 21.Qg5 Bb4 22.Kd1 h6 (22...Ne4 23.Qg3 Bg4 24.f3 Qh6 25.Qf4 Qf4 26.Rb2 Ra1 27.Rb1 Qd2) 23.Qg3 Ne4 24.Qd6 Bd6 25.Rb5 (25.Ke1 Rb1 26.Ke2 Ra2 27.Kf3 Ng5) 25…Nc3 (25...Nc3 26.Kc1 Bf4 27.Kc2 Ra2 28.Rb2 Bf5 29.Bd3 Bd3) 0–1. hamiltonharris (1885) – AL HARRIS (1610), ChessWorld.net, 2018.

4.bc5+– g6 5.Nc3+–.

3.ab5 c6

4.c4 cb5 5.cb5 g5 6.e4 Bg7 7.d4 e5 8.d5 Nf6 9.Bg5 a4 10.Ra4 Ra4 11.Qa4 h6 12.Bh4 Qc7 13.Bf6 Bf6 14.Qd1 Rg8 15.Ne2 Rg4 16.f3 Rh4 17.Ng3 d6 18.Bd3 Qd7 19.0–0 Bg5 20.Nf5 h5 21.Nh4 Bh4 22.Nc3 Qa7 23.Kh1 Qa3 24.Qc2 Qb4 25.Rb1 Qa5 26.b6 Na6 27.b7 Qc7 28.Ba6 Bb7 29.Rb7 Qb7 30.Bb7 Bf2 31.Qf2 h4 32.Nb5 f5 33.Qh4 fe4 34.fe4 Kd7 35.Qf6 Ke8 36.Bc6 1–0. Trkn – Tim, itsyourturn.com, 2000.

4.bc6 dc6 5.c3–/+.

2.a4 a6?

3.a5 Bb7 4.Bb2 Nf6 (4...e6 5.c3=+) 5.e3 (5.c3 e6=+) 5...e5 6.Be5 d6 (better 6...Nc6!? 7.Bc3 Bb4=+) 7.Bb2 Qe7 (7...d5 8.Ba3=) 8.c4 (better 8.c3+=) 8...c5?? (better 8...bc4 9.Bc3 d5=) 9.bc5+– bc4 10.cd6 (10.Bc4? Bg2 11.cd6 Qd6–+) 10...Qd6 11.Ba3 (better 11.Nf3!?+–) 11...Qe5+= 12.Bf8 (better 12.Nc3!? Ba3 13.Ra3+=) 12...Qa1= (worse 12...Rf8 13.Nc3+–) 13.Bg7 Rg8 14.Bh6? (14.Bf6 Qf6 A) 15.Bc4?? Bg2 (15...Rg2?! 16.Nh3–/+) 16.Qc2 Bh1–+; B) 15.Nf3=) 14...Rg6 (better 14...Bg2!? 15.Bg2 Rg2–+) 15.Bf4–/+ Nd5 (15...Bg2 16.Bg2 Rg2 17.Bg3=+) 16.Nh3 c3 (better 16...Rc6!?=+) 17.Nc3+= Qd1 (17...Qa5 18.Nd5 Bd5 19.f3=) 18.Kd1+– Nf4 19.Nf4 (19.ef4?! Nc6= (worse 19...Bg2 20.Bg2 Rg2 21.Nd5+–)) 19...Rg5 20.f3 (20.d4 Ra5 21.Kc2 Nd7+–) 20...Ra5+= 21.Ke2 (21.Kc2 Nd7+=) 21...Nc6 (21...Nd7 22.e4+=) 22.g4 (22.d4 Ra1+=) 22...0–0–0 (22...Nb4 23.Bg2 Rc5 24.Ne4 Be4 25.fe4+=) 23.Bg2 Nb4 24.Rc1 Ra2?? (better 24...Kb8+=) 25.Na2+– Bc6 (25...Nc6+–) 26.Nb4 1–0. AleksandrNekhoroshik (1610) – SirousDr (1620), lichess.org, 2020.

3.ab5+/– f5 4.Bb2 c6 5.e4 (5.e3 Nf6+–) 5...e6 (better is 5...fe4!? 6.Qh5 g6+/–) 6.ef5+– ef5 (6...Nf6 7.fe6 Bb4 8.bc6 Nc6 9.Bb5+–) 7.Qh5 Ke7 8.Ra3 (better is 8.ba6 Na6 9.Ba6 Ba6 10.Ra6 Ra6 11.Qe2 Kf7 12.Qa6 Qe7 13.Ne2 Qb4 14.Qa2 d5 15.0–0+–) 8...cb5?? (8...d5+–) 9.Re3 (9.Qf5 d5 10.Qe5 Kf7 11.Qh5 Ke6 12.Re3 Kd6+–) 9...Kd6 10.Re8 (10.Qf5?! Kc7+–) 10...Qe8 11.Qe8 (11...Ne7 12.Qf7+–) 1–0. Taulien,Hans_Juergen – Matthias,Klaus, remoteschach.de, 2002.

3.ab5+/– Nf6 4.ba6+/– Na6?? (better is 4...c6+/–) 5.b5+– d5 (5...c6 6.ba6 (6.Ra6?! Ba6 7.ba6 Qb8+–) 6...Ba6 7.Ba3+–) 6.e3 (worse is 6.ba6 Ba6 7.Nf3 g6+–; 6.Ra6?! Ba6 7.ba6 Qb8+–) 6...e5 7.ba6 Ra6 (7...Bd6 8.Bb5 Bd7+–) 8.Ba6 e4 (8...Ba6 9.Ra6 Bd6 10.Nf3+–) 9.Bb5 Bd7 10.Bd7 Qd7 (10...Nd7 11.Nc3 c6+–) 11.Ra8 Qd8 12.Rd8 Kd8 13.Bb2 Be7 14.Bf6 Bf6 15.Qh5 g6 16.Qd5 Ke8 17.Nc3 Bc3 18.dc3 Kf8 19.Qe4 Kg7 20.Qe5 Kh6 21.Qh8 c5 (21...Kg5 22.Nf3 Kg4 23.h3 Kf5 24.Qe5) 22.Nf3 c4 (22...f5 23.c4 f4 24.g4 fg3 25.hg3) 23.Qf6 Kh5 24.Qg5 1–0. pierre – qupry, internet, 2010.

3.ab5+/– ab5??

4.Ra8+– Bb7 5.Ra7 Qc8 6.Nc3+–.

4.Ra8 Bb7 5.Ra7 Qc8 6.e3 e6 7.c3 (7.Bb5?! Bg2 8.Bb2 Bh1+/–) 7...Nf6 8.Nf3 (8.Bb5?! Bg2 9.Nf3 Bh1=) 8...Nc6 9.Ra1 Ne4 (9...Ba6 10.Qc2+–) 10.Bb5 Bd6 (10...Be7 11.d4+–) 11.d3 Nf6 12.0–0 Ne5 13.Ne5 Be5 14.f4 Bd6 15.e4 c6 16.Bc4 0–0 (16...Be7 17.Nd2+–) 17.e5 Be7 18.ef6 Bf6 19.d4 d5 20.Bd3 h6 21.Qe2 g5 22.fg5 hg5 23.Qh5 Ba6 (23...Bd4 24.cd4 f5 25.Qg6 Kh8 26.Bf4 Qd8 27.Be5 Rf6 28.Ra7 g4 29.Rb7 Qc7 30.Rc7 f4 31.Bf6) 24.Qh7 1–0. _chess_ (2000) – jkarp, gameknot.com, 2011.

4.Ra8 Bb7 5.Ra7 Bc8 6.e4 Nc6 7.Ra8 Nb4 8.c3 Na2 9.Ra2 Bb7 10.d3 e5 11.Nf3 h5 12.Ne5 f6 13.Ng6 Bc5 14.Nh8 f5 15.Qh5 Kf8 16.Qf5 Nf6 17.Qc5 Ke8 18.Ng6 Ng4 19.Qf8 1–0. Trkn – Rees,Dave, itsyourturn.com, 2001.

4.Ra8+– Nc6 5.e3 (5.c3 Ne5+–) 5...Nb4 6.Ba3 Nd5 7.Bb5 Nb6 8.Rb8 (better is 8.Ra7+–) 8...Nc4 (8...c6 9.Bc5 Qc7 10.Rb6 cb5 11.Rb5 Qc6+–) 9.Bc4 Bb7 10.Bf7! Kf7 11.Rd8 Bg2 12.Nf3 (12…Bf3 13.Qf3 Nf6 14.Rd7+–) 1–0. b4_player – JEF112, GameColony.com, 2002.

3.ab5+/– Bb7

4.ba6 Ra6 5.Ra6 Na6 6.c3+/–.

4.ba6 Ba6 5.b5 Bb7 6.Ra8 Ba8+/–.

4.ba6 Ba6 5.b5+/– e6?? 6.ba6+– (6.Ra6?! Na6 7.ba6 Qb8–/+) 6...Bc5 (6...Ra6 7.Ra6 Na6+–) 7.d4 Bb6 8.e4 Nf6 9.e5 Ne4 (9...Nd5 10.c4 Qh4 11.Ne2+– (worse is 11.cd5 Bd4 12.Qf3 Ba1 13.de6 Ra7 14.ef7 Kf8 15.Ba3 d6 16.ed6 cd6 17.Bd6 Re7 18.Ne2 Qa4+–)) 10.Qg4 d5 11.Qg7 Ke7 12.c3 Na6 (12...Qg8 13.Qh6 Kd7 14.Be3+–) 13.Ba6 Rg8 (13...Qg8 14.Qg8 Rhg8 15.Kf1+–) 14.Qh7 Qf8 (14...Rg2 15.Bb5 c6 16.Ra8 Qa8 17.Ba3 c5 18.Ne2+–) 15.Qh4 Ke8 (15...f6 16.f3 Rh8+–) 16.Bb5 c6 17.Bc6 1–0. market (2150) – March2Victory (1730), GameColony.com, 2002.

4.ba6 Ba6 5.d3 d5 6.b5 Bb7 7.Ra8 Ba8 8.d4 Nf6 (8...c5 9.e4 cd4 10.Qd4 de4 11.Qd8 Kd8 12.b6+/–) 9.Bf4 e6 10.Nf3 Bb4 (10...Be7 11.e3+/–) 11.c3 Ba5?? (Better is 11...Be7+/–) 12.Qa4+– Bc3 (12...c6 13.Bb8 0–0 14.Bf4+–) 13.Nc3 Bb7 (13...Nbd7 14.e3+–) 14.b6 Nfd7 15.bc7 Qc7 16.Bc7 Nc6 17.Qb3 Ba8 18.Qa3 Bb7 19.Nb5 f6 20.Nd6 Ke7 21.Nb7 Kf7 22.Nd6 Kg6 23.Nh4 Kh6 24.Nf7 Kh5 25.Qf3 Kh4 26.Bg3 1–0. kamret (2160) – traderabc, GameColony.com, 2003.

4.ba6 Ba6 5.d3 e5 6.b5 Bb7 7.Ra8 Ba8 8.Nf3+/–.

4.ba6 Na6 5.b5 Nb4 6.Ra8 Qa8 7.Nf3+=.

4.ba6 Na6 5.c3 e5 (5...Nb4!? 6.Ra8 Qa8=) 6.e3 Qc8 7.Nf3 f6 (7...e4 8.Ne5+/–) 8.Be2 Nh6 9.0–0 Be7 10.d4 0–0 11.de5 d6 12.ed6 Bd6 13.Bb2 Ng4 14.h3 Nh6 15.Nbd2 Qf5 16.Nd4 Qc8 17.Bf3 Nf7 18.Bb7 Qb7 19.Nc4 Rad8 (19...Rfe8 20.Nf5 Bf8 21.Na5+–) 20.Nd6 Nd6? (20...Rd6 21.b5 Nc5 22.Ba3+–) 21.Qb3 (21.Ne6 Rfe8 22.Nd8 Rd8+–) 21...Kh8 (21...Rf7+–) 22.Ne6 Nb8 23.Nf8 Rf8 24.c4 1–0. minas_morgul (1650) – mr5reasons1 (1690), gameknot.com, 2012.

4.e3 ab5 5.Ra8 Ba8 6.Nf3 (6.Bb5?? Bg2 7.d4 Bh1–+) 6...e6 7.Bb2 (7.c3 Qf6+=) 7...Nf6 (7...Bb4?? 8.Bg7 (8.Bb5?! Nf6=) 8...Be4 9.Bh8+–) 8.g4 (8.Bb5!? Bb4 9.0–0=) 8...Ng4 9.Rg1 (9.Bb5 Qe7 10.Bc3 Qd6=+) 9...Nf6 (better 9...Bf3!? 10.Qf3 Nh2–/+) 10.Bb5= Bb4 (10...Rg8!?=) 11.Rg7+= Be7 (11...Bf8 12.Rg1+=) 12.Ne5 (better 12.Ng5 Rf8 13.Nh7 Nh7 14.Rh7+–) 12...Nc6?? (better 12...Rf8+=) 13.Nf7+– Qb8 14.Nh8 Qb5 15.Bf6 Bf6 16.Rh7 (16.Rg8 Ke7 17.Ra8 Nd8+–) 16...Qb2 (16...Qf5 17.Rh5 Qe4 18.f3+–) 17.Nc3! Nb4 (17...Bc3 18.Qh5 Double attack (18.Qh5 Decoy)) 18.Qh5 Kd8 19.Nf7 Kc8 (19...Ke7 20.Ne5 Kd8 21.Rh8 Bh8 22.Qh8 Ke7 23.Qg7 Kd6 24.Qf8 Ke5 25.f4) 20.Rh8! Kb7 (20...Bh8 21.Qh8 Combination) 21.Qb5 Ka7 22.Qb8 Ka6 23.Qa8 Kb6 24.Rb8 Kc5 25.Qa5 Kc6 26.Qb5 1–0. FeegLood (2810) – singapu85 (2670), lichess.org, 2017.

3.ab5+/– c6

4.ba6 Na6 5.c3 Nf6 6.g3 e6 7.Nf3 Bd6 8.Bg2 0–0 9.d4 Ne4 (9...Nc7!? 10.Ra8 Na8+–) 10.0–0 h6 (10...Bb7 11.Bb2+–) 11.Be3 c5?? (11...Bc7+–) 12.dc5 Be5 (12...Be7 13.Nfd2 Nd2 14.Nd2 Rb8+–) 13.Ne5 f6 (13...f5+–) 14.Be4 fe5 15.Ba8 e4 16.Be4 e5 17.Na3 1–0. Janek – Cramlex, internet, 2019.

4.ba6 Qb6 5.e3 (5.c3 d5+–) 5...e6 (5...Ba6 6.Ba6 Ra6 7.Ba3+=) 6.Bb2 (6.a7 Ra7 7.Ra7 Qa7+–) 6...c5 (6...Qb4!? 7.Bc3 Qb6+=) 7.b5 Bd6?? (better 7...Na6 8.Nc3 Qb7+–) 8.Bg7 c4 (8...Be5 9.Be5 f6 10.Qh5 Ke7 11.Qf3+–) 9.Bh8 (better 9.Nc3 Bb4 10.Bc4 Bc3 11.dc3 Qc7+–) 9...Bb4 (9...Qb5 10.a7 Nc6 11.Nc3+–) 10.Qg4 Qd6 (10...Ne7 11.Qc4 Bc5+–) 11.Qg8 Ke7 12.Bg7 c3 13.Qf8 1–0. GuestPHTQ – GuestJJRV, freechess.org, 2019.

4.c4 cb5 5.cb5 Qb6 (5...Bb7 6.Nc3+=) 6.e3+– Bb7 7.Nc3 (7.ba6 Na6 8.b5 Nc7 9.Ra8 Na8+–) 7...ab5+= 8.Ra8 Ba8 9.Nb5 (9.Qc2 Nc6+=) 9...Nc6 (9...Bg2!? 10.Nc7 Qc7 11.Bg2 e5=) 10.Qa4 (better 10.Bb2 Nf6 11.Bc3+=) 10...Nf6?? (10...Bb7 11.Bb2+=) 11.Bb2 (better 11.Qa8 Qb8 12.Qb8 Nb8 13.Nc3+–) 11...Bb7+= 12.Bd4 (12.Bc4 e6+=) 12...Nd4= 13.Nd4 (worse 13.ed4 e6–/+) 13...e5 Attacks the isolani on b4 14.Nc2 Be4 15.d3 Bc6 16.Qa5 Nd5 The pressure on the isolated pawn grows (16...Qb8 17.Nf3 Bd6 18.Nh4=) 17.Qb6 Nb6 18.d4 (18.Nf3 Bd6+=) 18...ed4 (18...Be4 19.Kd2+=) 19.b5+= de3 (19...d3!? 20.bc6 dc2 21.cd7 Nd7+=) 20.bc6+– ef2 21.Kf2 Bc5 22.Ne3 (22.Kf3 dc6 23.Bd3 Ke7+–) 22...dc6 (better 22...Nd5 23.Kf3 Be3= (23...Ne3? 24.c7 Ke7 25.Ba6+–)) 23.Bd3?? (better 23.Kf3+=) 23...Nd5–+ 24.Be4 (24.Kf3 Be3 25.Ne2 0–0–+) 24...Be3 25.Ke2 Bg1 26.Bd5 (26.Rg1 Nc3 27.Kd3 Ne4 28.Ke4 Kd7–+) 26...cd5 27.Rg1 Kd7 28.Kd3 Kd6 (28...Ra8 29.Rf1 Ke6 30.Re1 Kd6 31.Rf1–+) 29.Rf1 f6 30.Kd4 (30.Ra1 h5–+) 30...Ra8 31.Rf5 (31.Rf2 Ra4 32.Kd3 h5–+) 31...Ra4 32.Kc3 (32.Kd3 Kc5–+) 32...Ra2 33.Kd4 (33.Rh5 Rg2 34.Rh7 Ke5–+) 33...Rg2 (better 33...Rd2!? 34.Ke3 Rg2 35.Rh5–+) 34.Rd5 Ke6 35.Rh5 h6 36.Ke3 Kf7 (36...f5 37.Kf3 Ra2 38.Rh4–+) 37.Kf3 Kg6 38.Rh3 Ra2 39.Rg3 (39.Rh4 Kh7 40.h3 Ra3 41.Kg2 g5–+) 39...Kf7 40.Kf4 (40.Rg1 Rh2 41.Kg3 Rc2–+) 40...Ra4 41.Kf5 (41.Kf3 Ra3 42.Kg4 Rg3 43.Kg3–+) 41...Ra5 (better 41...g6 42.Rg6 Ra5 43.Kg4 Kg6–+) 42.Ke4 Ke6 (42...f5 43.Kd4–+) 43.Kd4 (43.Rg7 Ra2–+) 43...Ra4 44.Kc3 (44.Kc5–+) 44…Ra3 (44...Ra3 45.Kd2 Rg3 46.hg3 Kf5–+) 0–1. afsharian – knightdefense, lichess.org, 2018.

4.bc6 dc6 5.c3+/–.

4.bc6 Nc6 5.b5 Nb4 6.Ra4 Nd5+/– 7.Nf3 d6 (7...Rb8!?+= 8.e4 (8.Ra1 ab5 9.e4 Nc7 10.d4 d5 11.Ne5 Rb7 12.ed5) 8...ab5 9.Rd4 Nc7 10.Ne5 Rb6 11.Bb2 Nh6 12.Nd3) 8.e4+– Nb6 9.Ra6 (9.Ra1 a5 10.d4+– Nf6 11.Bd3 d5 12.Nbd2) 9...Nf6? (better is 9...Ba6!? 10.ba6 Nf6 11.Bb5 Nbd7+/– 12.0–0) 10.Ra8+– Na8 11.Nc3 e6 12.Bd3 Bb7 13.Bb2 Be7 14.0–0 e5 15.Qe2 0–0 16.Ra1 Nb6 17.h3 Nh5 18.g3 Nf4?? 19.gf4 ef4 20.e5 Bf3 21.Qf3 de5 22.Qe4 g6 23.Qe5 Bd6 24.Qd4 f3 25.Ne4 f6 26.Nd6 Nd7 27.Bc4 Kh8 28.Nf7 Rf7 29.Bf7 Qc7 30.Qf6! Nf6 31.Bf6 1–0. pierre – killer, internet, 2011.

4.bc6 Nc6 5.b5! ab5 6.Ra8.

4.bc6 Nc6 5.b5! Nb8 6.c4 (6.e4 Bb7 7.Nc3 Nf6+/–) 6...d5 (6...Bb7 7.Nf3+/–) 7.e3 Nf6 (7...e5 8.Bb2 f6 9.d4 dc4 10.Bc4+/–) 8.c5+– e6 9.Qc2 (9.d4 Be7+–) 9...Nfd7 (9...Be7!?+/–) 10.d4 Bb7 (10...Nf6 11.Qa4+–) 11.c6 Bc6 12.bc6 Qc8 13.cd7 Nd7 14.Qc8 Rc8 15.Bd2 Rb8 16.Nc3 Bb4 17.Ba6 Nb6 18.Nf3 0–0 19.Ne5 Rfd8 20.Nc6 Nd7 21.0–0 Re8 22.Rfb1 Rb6 23.Nb4 Ra8 24.Bb5 Rb7 25.Ra8 Nb8 26.Bc6 Rc7 27.Rb8 Rc8 28.Rc8 1–0. Taulien,Hans_Juergen (2350) – Stahn,Hartmut (2000), remoteschach.de, 2004.

3.ab5+/– d5

4.d4 ab5 5.Ra8 e5 6.Rb8 g5 7.de5 g4 8.e4 Nf6 9.ef6 Qf6 10.Qg4 Bb4 11.Nd2 Qa1 12.Bb5 Kd8 13.Qd7 1–0. marekt – yasminedge, gameknot.com, 2001.

4.e3 e5 5.Bb2 Bd6 6.Nf3+/–.

4.e3 e6 5.Bb2 (better is 5.c3 Bb7 6.ba6 Na6 7.d4+/–) 5...Bb4?? (better is 5...Nf6 6.ba6 Bb4+/–) 6.Bg7+– Bb7 (6...Bd6 7.Bh8 Nf6 8.Nf3+–) 7.ba6 Ra6 (7...Ba6 8.Ba6 Na6 9.Bh8+–) 8.Ra6 (better is 8.Ba6 Na6 9.Bh8 Qg5+–) 8...Ba6 9.Ba6 Na6 (9...Qg5 10.Bh8 Qg2 11.Bf1 Qh1 12.Qg4 Bd2 13.Nd2+–) 10.Bh8 Nh6 (10...Qg5 11.Nf3 Qg6 12.0–0+–) 11.Bc3 (11.c3 Ke7 12.cb4 Qh8+–) 11...c5 (11...Qg5 12.g3 Qf5 13.Nf3+–) 12.Nf3 (12.Qh5 Bc3 13.Qh6 Ba1+–) 12...Bc3 13.Nc3 c4 (13...Nb4 14.0–0+–) 14.Qa1 (better is 14.e4+–) 14...Nb4 (14...Nc7+–) 15.Qa4 Qd7 16.Qb4 Qa7 (16...f6 17.e4 Ng8 18.ed5 ed5 19.0–0+–) 17.0–0 Nf5 18.Rb1 (18.e4 de4 19.Ne4 Qe7 20.Qc4 Kf8+–) 18...Qc7 19.Nb5 Qb6 20.g4 Nd6 21.Nd6 Qd6 22.Qd6 (22..f5 23.Ne5 fg4 24.Rb8 1–0. Fredek (2065) – Guest218821, Freundschaftspartie, 5m + 0s, 2006.

3.ab5+/– e5

4.Bb2 d6 5.e3 Nf6 6.c4 Be7 7.Nf3 c6 8.Nc3 d5 9.cd5 cd5 10.Ne5 Bb4 11.Be2 Qd6 12.d4 Bd7 13.0–0 0–0 14.ba6 Rc8 15.Nd7 Nfd7 16.Qa4 Bc3 17.Rfc1 Nc6 18.Bc3 Rcb8 19.Rcb1 Rb6 20.Rb6 Nb6 21.Qa3 Qa3 22.Ra3 Ra7 23.Rb3 Na4 24.Bd2 Ra8 25.Bb5 g6 26.Bc6 Rc8 27.Ba4 Ra8 28.Rb6 Ra7 29.Bc6 Rc7 30.Bb7 Rc2 31.Be1 Rc1 32.Kf1 Ra1 33.Bd5 Kg7 34.Bc4 Rc1 35.a7 Rc4 36.a8Q Rc7 37.Qa1 Rd7 38.d5 Kf8 39.Qh8 Ke7 40.Bb4 Rd6 41.Rb7 1–0. Trkn – Damon_sol, itsyourturn.com, 2000.

4.c3+=.

4.Nf3+/–.

2.a4 Ba6?

3.a5 Bb7 4.Bb2 e6 5.c3 d6 (5...Nf6!?=+) 6.Nf3= g6 (6...Nf6!?=) 7.e3+– a6 (7...Nd7!?+–) 8.c4 Qd7?? (better 8...Nf6 9.cb5 Bg7+–) 9.Bh8+– f6 (9...bc4 10.Bc4 d5 11.Be2 Bb4 12.Nc3+–) 10.cb5 ab5 11.Nc3 c6 12.h4 h5 13.Ne4 d5 (13...Qf7 14.Bd3+–) 14.Nf6 Nf6 15.Bf6 Qf7 16.Bc3 Na6 17.Ne5 Qf5 (17...Qc7 18.Qb1 0–0–0 19.Ng6 Bd6+–) 18.Bd3 Qf6 19.Bg6 Ke7 20.Qh5 d4 21.Bd4 Nb4 22.Nc6! Bc6 (22...Nc6 23.Bf6 Double attack (23.Bf6 Discovered attack; 23.Qc5 Deflection; 23.Qh7 Decoy); 22...Bc6 23.Bf6 Discovered attack (23.Qc5 Deflection; 23.Qh7 Decoy)) 23.Bf6 Kf6 24.Qg5 Kg7 25.Be8 Kh8 (25...Kh7 26.Qg6 Kh8 27.Bf7 Nc2 28.Kf1 Ne3 29.Kg1 Bg7 30.Qh5 Bh6 31.Qh6) 26.Bf7 Be4 (26...Nd3 27.Kf1 Bg2 28.Kg1 Kh7 29.Qg6 Kh8 30.Qg8) 27.Qg8 1–0. Pierre – Roccho, internet, 2019.

3.a5 e5 4.c3 Nf6=.

3.e3 d5 4.ab5+– Bb5?? (better 4...Bb7+–) 5.Bb5+– c6 6.Ba4 e5 (6...Qb6 7.Ba3+–) 7.Bb2 (7.b5 Qb6+–) 7...e4 8.d3 (8.Nh3 Nf6 9.b5 Qd7 10.bc6 Nc6 11.Bf6 gf6+–) 8...Nf6 (8...Bb4 9.c3 Be7 10.de4 de4 11.Nd2+–) 9.b5 (better 9.Bc3 Be7+–) 9...Qb6 (9...Bb4 10.Nd2 Qd7 11.Bf6 gf6 12.bc6 Qd6+–) 10.bc6 (10.Bf6 gf6 11.de4 Qc5+–) 10...Nc6?? (better 10...Qb2 11.Nd2 Bb4 12.c7 Nbd7+–) 11.de4 Bb4 (11...de4 12.Bf6 gf6 13.Qg4+–) 12.c3 Be7 (12...Bd6 13.ed5 0–0 14.Bc6 (worse 14.dc6 Qb2 15.Nd2 Qc3+–) 14...Qb2 15.Nd2 (worse 15.Ba8 Qa1 16.Bc6 Rb8+–) 15...Qc3 16.Ne2+–) 13.ed5 Rd8 (13...0–0 14.Bc6 Qb2+–) 14.Bc6 Rd7 (14...Kf8 15.Ra2+–) 15.Bd7 Nd7 16.Qc2 (16.Ba3 Ba3 17.Na3 0–0+–) 16...a5 (16...Nc5 17.Ba3 0–0 18.Nf3+–) 17.Ba3 (17.c4 0–0+–) 17...Bf6 (17...Ba3 18.Na3 0–0 19.Nf3+–) 18.Qe4 (18.Nf3 Qb7 19.Qe4 Kd8+–) 18...Be5 19.f4 (better 19.Nf3 f6+–) 19...Qf6 20.fe5 (better 20.Nf3 Qg6 21.Qg6 Bc3 (21...fg6?? 22.fe5 Nb6 23.e4+–) 22.Nc3 hg6+–) 20...Ne5 21.Nf3 Kd8 22.Qe5 (better 22.Ne5 Re8 23.Bd6 Re5 24.Be5 Qg6+–) 22...Re8 23.Qf6 (better 23.Qb8 Kd7 24.Qb5 Kd8 25.Qa5 Kc8+–) 23...gf6 24.Ke2 (24.Bc5 Kd7 25.Ra5 Rb8+–) 24...Re4 25.Nbd2 Rg4 26.Kd3 (26.Rhg1 f5+–) 26...Rg2 27.Rab1 (27.Rhb1 Kc8 28.Bc5 Rg4 29.Ra5 Rg5 30.Ra8 Kc7 31.Bd6 Kd6 32.Ne4 Kc7 33.Ra7 Kc8 34.Nd6 Kd8 35.Rb8) 27...Rg6 28.d6 (28.Rb8 Kc7 29.Rhb1 f5 30.R1b7) 28...f5 29.Rb8 Kd7 30.Ne5 Ke6 31.Ng6 (31.d7 Kd5 32.d8Q Ke5 33.Qd4 Ke6 34.Qd6) 31...Kf6 (31...fg6 32.Re8 Kf6 33.d7 Kg7 34.Bf8 Kf7 35.d8Q g5 36.Re7 Kg6 37.Rg7 Kh5 38.Qg5) 32.d7 Kg6 (32...Kg6 33.Rg1 Kh6 34.Rh8 f4 35.Bf8 Kh5 36.Rh7; 32...f4 33.d8Q Kg6 34.Rg1 Kf5 35.e4 Ke5 36.Qd6) 0–1. jaddwarrior (1930) – Redsurf (2305), ChessWorld.net, 2014.

3.e3 e5 4.ab5 Bb5?? (better 4...Bb7+–) 5.Bb5+– a6 (5...Nc6 6.Bb2+–) 6.Bb2 ab5 (6...Nc6 7.Bc6 dc6 8.Be5+–) 7.Ra8 Bd6 (7...Qc8 8.Be5 Qb7 9.Ra1+–) 8.Nf3 Ne7 (8...Nf6 9.Be5 Be5 10.Ne5+–) 9.Be5 Be5 (9...Bb4 10.Bg7 Rg8 11.Bf6+–) 10.Ne5 0–0 11.Nc3 Nec6 (11...c6 12.Nd3+–) 12.Nc6 dc6 13.Qg4 h6 (13...Qd6 14.Qd4 Qe7 15.Ke2+–) 14.Ke2 Qe7 (14...f5 15.Qf4 Qe7 16.Ra7+–) 15.Rha1 g5 (15...f5 16.Qd4 Rc8 17.Kf1+–) 16.h4 f5 (16...Qd7 17.Qh5+–) 17.Qh5 Qg7 (17...f4 18.Qh6 g4 19.Qg6 Kh8 20.Qg4 Qb4 21.Qh5 Kg8 22.Qg5 Kh8 23.ef4+–) 18.hg5 hg5 19.g4 f4 20.Ne4 f3 21.Ke1 Qf7 22.Qg5 Qg7 23.R1a7 Qg5 24.Ng5 Nd7 25.Rf8 Kf8 26.Rc7 Ne5 27.Ne6 Ke8 28.g5 Ng6 29.Ng7 Kd8 30.Rc6 Ne7 31.Rd6 Kc7 (31...Kc8 32.Rf6 Kd8 33.Nf5 Nc6 34.Rc6 Ke8 35.Rf6 Kd8 36.Rf7 Ke8 37.g6 Kd8 38.g7 Ke8 39.g8Q) 32.Ne8 Kc8 33.e4 Ng8 (33...Ng6 34.Rg6 Kd8 35.Ng7 Kc8 36.Nf5 Kd7 37.Rd6 Kc8 38.g6 Kc7 39.g7 Kb7 40.g8Q Kc7 41.Qd8 Kb7 42.Rb6 Ka7 43.Qb8) 34.Nf6 Ne7 (34...Kc7 35.Rd3 Kc6 36.Ng8 Kc7 37.g6 Kc6 38.Ne7 Kb7 39.Rd7 Kb6 40.g7 Ka6 41.g8Q Kb6 42.Qe6) 35.Nd5 (35.Nd5 Kb7 36.Rd7 Kc8 37.Re7 Kb8 38.g6 Kc8 39.g7 Kd8 40.g8Q) 1–0. Pierre – Ferhat, internet, 2019.

3.e3 Nf6 4.c3 Bb7 5.ab5 e6 6.Nf3 Bd6 7.Be2 0–0 8.0–0 +/– .

3.e3 g6 4.Bb2 Nf6 5.Nc3 Bg7 6.ab5 (worse 6.Nb5 c6 7.Nd4 Bf1 8.Kf1 Qb6+=) 6...Bb7 7.Nf3 0–0 8.d4 Ne4 9.Ne4 White fights for the Initiative 9...Be4 10.Bd3 d5 11.c4 Bd3 12.Qd3 dc4 13.Qc4 Nd7 14.0–0 Re8 (14...Nb6 15.Qc5+–) 15.Ra2 (15.Rfc1 Qb8+–) 15...e5 16.Rd1 (16.de5!? Ne5 17.Be5 Be5+–) 16...e4+– 17.Nd2 Nb6 18.Qc2 Nd5 19.Ba3 (worse 19.Ne4 Nb4 20.Qb3 Na2–/+) 19...Bf8 (19...f5 20.Nb3+–) 20.Rb2 (20.Ne4 Rb8+–) 20...h5? (better 20...Qh4!?+=) 21.Ne4+– Qh4 22.Ng3 Bd6 23.Qc6 Nf6 24.Qf3 g5?? (24...Rab8 25.Re1 Ng4+=) 25.Qf6+– Re4 (25...Re6 26.Qf5 Qg4+–) 26.f3 (better 26.Ne4 Bh2 27.Kf1 Qe4 28.Qg5 Kf8+–) 26...Bg3 (26...Re3 27.f4 Bf4+–) 27.hg3 Qg3 (27...Re6 28.Qe6! Qd4 29.Qf7 Kf7 30.Rd4+–) 28.fe4 Qe3 29.Rf2 Rf8 30.Bc1 Qe4 31.Qg5 (31.Rf5 Qf5 32.Qf5 Kh8 33.Qg5 Re8 34.Qf6 Kh7 35.Qf7 Kh8 36.Qe8 Kg7 37.Qe7 Kg6 38.Rf1 a5 39.Rf6) 31...Qg6 32.Qg6 fg6 33.Rf8 Kf8 34.Rf1 (better 34.Re1 g5+–) 34...Kg7 (34...Ke7 35.Bf4+–) 35.Kh2 a5 36.ba5 (36.ba6 Kg8 37.a7 Kg7 38.a8Q g5 39.Qf8 Kh7 40.Qe7 Kg6 41.Rf6) 36...c5 (36...g5 37.a6 h4 38.a7 Kh7 39.a8Q Kg7 40.Qf8 Kh7 41.Rf6 h3 42.Rh6) 37.dc5 (37.b6 Kg8 38.b7 g5 39.b8Q Kg7 40.Qf8 Kh7 41.Qe7 Kg6 42.Rf6) 37...h4 38.a6 h3 39.a7 g5 40.gh3 (40.a8Q hg2 41.Qf8 Kh7 42.Qf7 Kh6 43.Rf6) 40...g4 (40...Kg6 41.a8Q Kh7 42.Qb7 Kg6 43.Qf7 Kh6 44.Rf6) 41.a8Q gh3 (41...g3 42.Kg3 Kh7 43.Qe4 Kg7 44.Qe7 Kg6 45.Qf7) 42.Kh3 (42.Qb7 Kg8 43.Qf7 Kh8 44.Bb2) 42...Kh7 43.Kg3 (43.Qb7 Kg8 44.Qf7 Kh8 45.Bb2) 43...Kg6 (43...Kg7 44.Qb7 Kg8 45.Qf7 Kh8 46.Bb2) 44.Qf8 (44.Qg8 Kh5 45.Qf7) 44...Kh5 (44...Kh7 45.Qe7 Kg6 46.Qf7) 45.Kf3 (45.Qf5) 45...Kh4 (45...Kg6 46.Rg1 Kh5 47.Qh6) 46.Rg1 (46.Rh1) 46...Kh3 (46...Kh5 47.Qh6) 47.Qh8 (47.Rh1) 1–0. sirgeshdb (1715) – Lunnaris01, lichess.org, 2020.

3.e4 Bb7 4.ab5 Be4 5.Nc3.

3.e4 c6 4.ab5 Bb5 5.c4 Ba6 6.d4 e5 7.b5 cb5 8.cb5 Bb7 9.de5 Be4 10.Nc3 Bf5? 11.Qf3 d5 12.Qf5 Ne7 13.Qd3 Nd7 14.Nf3 Nc5 15.Qd1 Nf5 16.b6! a5 17.Bb5 Nd7 18.Qd5 Ne7 19.Bd7 Qd7 20.Qa8 Nc8 21.b7. pierre_d – kikinurass, ChessWorld.net, 2005.

3.e4 e5 4.ab5+/– Bb7 5.d3 a6 6.ba6+/– Ba6 7.b5 Bb7 8.Ra8 Ba8 9.Nf3 d6 10.Be3 Be7 11.d4 Nf6 12.de5 Ne4 13.ed6 cd6 14.Bd4 0–0 15.Bd3 Qa5 16.Nfd2 Nd2 17.Nd2 Bg5 18.0–0 Bd2?? 19.Be3?? Be3–+ 20.fe3 Bd5 21.Qh5 Qa2?? 22.Qh7 1–0. andre2004 – gengar, ChessWorld.net, 2005.

3.a5 Nc6

4.c3 e5 5.g3=+ Nf6 6.Bg2 Bd6 (6...Be7 7.d3=+) 7.d3= h6 (7...e4 8.de4 Qe7 9.Nd2+=) 8.Nf3 Nd5? (better 8...0–0!?=) 9.Ne5!+– Be5 (9...Ne5 10.Bd5 Discovered attack; 9...Be5 10.Bd5 Discovered attack) 10.Bd5 Qf6 (10...Nb4!? 11.Ba8 Qa8+–) 11.d4+– Qd6?? (better 11...Bd6+–) 12.de5 Qg6 (12...Qe5 13.Bf4 Qf6 14.Ra3+–) 13.f4 0–0 14.Be3 Rae8 (14...Rad8 15.Nd2+–) 15.0–0 Ne7 (15...Bc8 16.Na3 a6 17.Bc5+–) 16.Bg2 Nf5 (16...d6 17.ed6 Qd6 18.Ba7+–) 17.Ba7 Bc8 (17...Rd8 18.Qc2 Qg4 19.Bf3+–) 18.a6! Ne3 (18...Ba6 19.Qd7 Deflection) 19.Be3 d6 20.a7 Bf5 21.a8Q Ra8 22.Ba8 Qe6 23.Bd5 Qg6 24.Na3 Rc8 25.Nb5 c6 26.Bf7! Qf7 (26...Qf7 27.Nd6 Double attack (27.Nd6 Decoy); 26...Kf7 27.Nd6 Double attack) 27.Nd6 Qf8 28.Qb3 Kh7 29.Ra7 Rd8 30.Rf7 Bc2 31.Qc2 Kg8 (31...Kh8 32.Rf8 Rf8 33.e6 Rf6 34.e7 Re6 35.e8R Re8 36.Ne8 Kg8 37.Qg6 Kf8 38.Bc5 Kg8 39.Qg7) 32.Rf8 (32.Rf8 Rf8 33.e6 Ra8 34.e7 Rb8 35.Qg6 Ra8 36.Bd4 Kh8 37.Qg7) 1–0. Marekt – MrCarp, internet, 2020.

4.g3 Nf6 5.c3 g6 6.Bg2 e6 7.h4 Qb8 8.Bf3 Bb7 9.g4 d5 10.a6 Bc8 11.d4 Bg7 12.g5 Ne4 13.Be4 de4 14.Bf4 Bd7 15.Bh2 Qc8 16.e3 Ne7 17.Nd2 Nd5 18.Ne4+/– 0–0 (19.h5 Bc6+/–; 18...Bc6 19.Qf3). riverborne – Arcas, Live Game Caissa's Web, 2005.

3.ab5 Bb5

4.Na3 a6?? 5.Nb5+– ab5 (5...Nc6 6.Nc3 Nb4+–) 6.Ra8 c6 7.e3 (7.Bb2 e6+–) 7...Qc8 (7...Nf6 8.Bb2 Nd5 9.Qa1+–) 8.Bb2 f6 9.Be2 g6 (9...e6 10.c3+–) 10.Qa1 d6 (10...Qb7+–) 11.Qa7 Qb7 (11...Kf7 12.Rb8 Qe6+–) 12.Qb7 (12.Qb7 Kf7 13.Rb8+–) 1–0. GuestKFJW – GuestHKKM, freechess.org, 2018.

4.Nc3 Ba6 5.Nf3 Nc6?? 6.b5 Rb8 7.Ra6 Nb4 8.Ra4 Rb5 9.Nb5 c6 10.Rb4 cb5 11.Rb5 1–0. byco – kaxigv, internet, 2009.

4.Nc3 c6 5.Nb5 cb5 6.e3 a6 (6...Nc6!?+=) 7.Bb5!+– e6 (7...ab5 8.Ra8 Pinning (8.Ra8 Deflection)) 8.Bb2 (8.c3 Ne7+–) 8...Ke7 (better 8...Nc6!? 9.Bc6 dc6+–) 9.Qf3+– Ra7 10.Bd4 Rc7 11.Ba6 (11.Bd3 Nc6+–) 11...Rc2 12.Bd3 (12.Qd1 Rc7+–) 12...Rc8 13.b5 Ke8 14.Ne2 f6 (14...Nf6 15.0–0+–) 15.Qh5 Ke7 16.Nf4 e5?! (16...Nh6 17.Bc5 d6 18.Ra7 Nd7 19.Ne6 Rc5 20.Nc5 (20.Nd8?! Rh5 21.Nc6 Ke8+–) 20...dc5 21.Qd5+–) 17.Nd5 (17.Bb6! Qe8 18.Ng6 Kd6+–) 17...Kd6 18.Bb6 Qe7 (18...Qe8 19.Qe8 Re8+–) 19.Ne7 (19.Ne7 Ne7 20.Qf7+–) 1–0. DEFFM – GuestSBYT, freechess.org, 2019.

4.Nc3 c6 5.Nf3 Qb6 6.Nb5 Qb5 7.c3 c5 8.Ra5 Qc4 9.Rc5 (9...Qa6 10.Ne5+–; < 9.bc5 Nc6 10.e3 Qd5+–) 1–0. miehnekort – ibuynsellhome2, Yahoo, 2005.

4.Nc3 c6 5.Nf3 e6 6.Nb5 cb5 7.e3 Bb4+= 8.Bb2 Nf6 9.Bb5 Nc6 10.Ra6 Qc8 11.0–0 0–0 12.Bf6 gf6 13.c3 Bd6 14.Qa4+– Nb8?? 15.Rd6 Rd8 16.Qg4 Kh8 17.Qh4 Kg8 18.Qf6 Kf8 19.Ng5 (19.Ng5 Kg8 20.Qf7 Kh8 21.Qh7 1–0. pierre – typvz, internet, 2009.

4.Nc3 c6 5.Nf3 e6 6.Nb5 cb5 7.e3 Qb6 8.Nd4 a6 9.Nb5! Bb4 10.Qg4 g6?? 11.Qb4+– Nc6 12.Nd6 Kd8 13.Qb6 (13.Qb6 Ke7 14.Bb2+–) 1–0. mieczyk – nookw, internet, 2010.

4.Nc3 Bc6 5.Nf3 Qc8 6.b5 Bf3 7.ef3 c6 8.Bd3 cb5 9.Nb5 a6 10.Qe2+/– Nc6?? 11.Nd6+– Kd8 12.Nc8 Rc8 13.Rb1 d6 14.Ba6 Rc7 15.Rb6 Kd7 16.Qb5 e6 17.Rc6! Rc6 18.Bb7 Kc7 19.Bc6 Ne7 20.Qb7 Kd8 21.Qd7 1–0. Marram – Omer Faruk Cerrah, internet, 2010.

4.Nc3 Bc6 5.Nf3 e6 6.b5+= Bb7 7.e4 Bc5 8.Ra4 Ne7 9.d4+/– Bb6 10.Bd3 d5 11.ed5 Nd5 12.Nd5 Bd5 13.c4 Bf3 14.Qf3 Bd4?? 15.Qa8 0–0 16.Qe4 e5 17.Qh7 1–0. marre – etuna, internet, 2010.

4.d3 d5 5.g3 (5.Nf3!?+=) 5...e6= 6.Bd2 c5 7.Na3 Bc6 (7...Bd7 8.b5=+) 8.b5= Bb7 9.c4 (better 9.Bg2!?=) 9...dc4–/+ 10.dc4?? (better 10.Nf3 cd3 11.ed3–/+) 10...Bh1–+ 11.f3 g6 (better 11...Bd6 12.Nh3 Be5 13.Ra2–+) 12.Kf2?? (12.Bc3 Qd1 13.Kd1–+) 12...Bg7 13.Rb1 Nf6 (better 13...a6 14.b6 Nc6 15.Nh3–+) 14.Nh3 Ne4 (better 14...a6 15.Kg1 ab5 16.Nb5 Bf3 17.ef3 Ra2–+) 15.Kg1 (15.fe4 Be4 16.Bg2 Bg2 17.Kg2–+) 15...Bf3 (15...Nd2!? 16.Kh1 Nb1 17.Qb1–+) 16.ef3 (16.Be3 Qd1 17.Rd1 Nc3–+) 16...Nd2 17.Nf2 (17.Rc1 a6–+) 17...Nb1 18.Qb1 Nd7 (18...a6 19.Qb3–+) 19.Nc2 (19.Bg2 a6 20.f4 Ra7 21.ba6 Ra6–+) 19...Ne5 (19...a6!? 20.Ne4–+) 20.Qb3 0–0 21.Ne4 (21.f4 Nd7–+) 21...Qc7 (better 21...Qd1!? 22.Kg2 Rfd8 23.f4–+) 22.Be2 (22.f4 Nd7–+) 22...Rfd8 23.Qe3 Rac8 (23...a6 24.f4 Nd7 25.Kg2–+) 24.Qb3 (24.Kh1 Qb6–+) 24...Rd4 (better 24...f5 25.Ng5 Rd2 26.Bf1–+) 25.Nd4 cd4 26.c5 Rd8 27.f4 d3 28.Bd1 (28.Bf1 Nf3 29.Kh1 d2–+) 28...Nd7 29.c6 Qb6 30.Kg2 Nc5 31.Nc5 Qc5 32.Qa4 Rb8 33.Qa6 Qb5 (33...Rb5 34.c7 Rb2 35.Kh3–+) 34.Qb5 (34.c7 Qd5 35.Bf3 Rb2 36.Kh3 Qf3 37.c8Q Bf8 38.Qf8 Kf8 39.Qa3 Kg8 40.Qb2 Qf1 41.Kh4–+) 34...Rb5 35.Ba4 (35.Kf3 Bc3–+) 35...Rc5 36.Kf3 Bc3 37.Ke3 d2 38.Ke2 Kf8 39.Kd3 (39.Kd1 Ke7–+) 39...Rc6! 40.Ke2 (40.Bc6 A deflection 40...d1Q) 40...Rd6 41.Bd1 e5 (41...e5 42.fe5 Be5–+) 0–1. petrobbo (1950) – urko (2065), ChessWorld.net, 2010.

3.e3! ba4

4.Ba6 Na6 5.Ra4 Qb8? 6.Ra6 Qb4 7.Ra1 1–0. DEFFM – GuestGTFM, freechess.org, 2018.

4.Ba6 Na6 5.Ra4 Nb8 6.Qf3 c6 7.b5 e5 8.Ne2 Bd6 (8...cb5!? 9.Qa8 ba4 10.Qa7 Nc6 11.Qa4 Nf6+/–) 9.Nbc3 Nf6 10.bc6 dc6 11.Nb5?? (better is 11.Ng3+/–) 11...Qb6 (better is 11...cb5 12.Qa8 ba4 13.Qa7 Qd7–+) 12.Nd6+– Kd8 (12...Kf8+–) 13.Nf7 Kc8 (13...Ke8 14.Nh8 Nbd7 15.Rc4+–) 14.Qf5 (14...Nbd7 15.Nh8+–) 1–0. MasterofDisaster – yourrrmove, Live Game Caissa's Web, 2004.

4.Ba6 Na6 5.Ra4 Qc8 6.Qe2 Nb8 7.Nf3 Nf6 8.Bb2 Nc6 (8...Qb7 9.0–0+=) 9.b5 Nd8 10.0–0 c6 11.Nc3 cb5 12.Nb5 (12.Qb5? Rb8 13.Qd3 Rb2 14.Ra7 Nc6–+) 12...Nc6 (12...a6 13.Rfa1 Ne6 14.Bf6 gf6 15.d4+–) 13.Rfa1 e6 (13...Qb7 14.Bd4+–) 14.Na7 (14.Bf6!? gf6 15.c4+–) 14...Na7 15.Ra7 Ra7 16.Ra7 Be7 17.Qd3 Qb8 (17...Bc5 18.Ra1+–) 18.Bf6 Bf6?? (18...Qa7 19.Bg7 Rf8+–) 19.Qd7 (19.Qd7 Kf8 20.Qf7) 1–0. DEFFM – GuestRYKX, freechess.org, 2018.

3.e3! Bb7

4.ab5 a6 5.Nf3.

4.ab5 e5 5.Nf3 Qf6 (better is 5...e4!? 6.Ne5 Bb4) 6.Bb2+/– Bf3 7.Qf3 Qd6?? (better is 7...Qf3 8.gf3 f6+–) 8.Qa8 Nf6 (8...c5 9.Ra7 cb4 10.Rb7+–) 9.Qb8 Ke7 10.Ra6 Qb4 11.Ba3 (11...Qa3 12.Ra3+–) 1–0. pierre (2145) – donny38, internet, 2007.

4.ab5 e6 5.c3+–.

3.e3! c6

4.ab5 cb5 5.Qf3 d5 6.Ra6 Na6 7.Bb5 Qd7 8.Bd7 Kd7 9.Qd5 (9...Kc8 10.Qa8 Nb8 11.Qa7+–) 1–0. pierre (2125) – LuckyMiki, internet, 2007.

4.ab5 cb5 5.Qf3 d5 6.Ra6 Qd7 7.Nc3 Na6 8.Bb5 Rd8 9.Bd7 Rd7 10.Nd5 Nf6 11.Nf6 gf6 12.Qa8 Rd8 13.Qc6 Rd7 14.Qc8 Rd8 15.Qa6 Bg7 16.Qa7 0–0 17.Qe7 Ra8 18.c4 Rfe8 19.Qd6 Ra1 20.Ne2 h6 21.b5 Re6 22.Qb8 Kh7 23.d4 f5 24.Kd1 Re4 25.c5 Bf6 26.c6 Re7 27.b6 Rb1 28.c7 (28...Rc7 29.bc7 Rc1 30.Nc1+–) 1–0. marekt – jimmyjf, ChessWorld.net, 2004.

4.ab5 cb5? 5.Qf3+– d5?? 6.Ra6! e6 7.Bb5 Nd7 8.c4 Bb4 9.cd5 Rc8 10.Bb2 Ngf6 11.de6 fe6 12.Re6 Kf7 13.Bd7 Qd7 14.Rf6! gf6 15.Qf6 Kg8 16.Qh8 Kf7 17.Qh7 Ke8 18.Qh5 Kd8 19.Bf6 Be7 20.Be7 Qe7 21.Nc3 Rc5 22.Qh8 Kc7 23.Nge2 Qd6 24.0–0 a5 25.Qe8 Qd3 1–0. marekt – undercover, gameknot.com, 2001.

4.ab5 Bb5 5.Bb5 cb5 6.Bb2 Nc6= 7.Qg4 Nf6 8.Bf6+= ef6 9.c3 Ne5 10.Qe4 g6 11.Nf3 d6? 12.Ne5+– fe5 13.Qc6 Ke7 14.Qb5 Qc7 15.0–0 Bg7 16.Ra6 Rhb8 17.Qa5 Qa5+= 18.Ra5 a6 19.Na3 Ke6 20.Rb1 Bf8 21.b5 ab5+= 22.Ra8 Ra8 23.Nb5 Ra2 24.d4 ed4 25.cd4 f5 26.d5 Kd5?? 27.Nc3+– Kc4 28.Na2 d5 29.Rd1 Bg7 30.Nc1 g5 31.Ne2 h5 32.Ng3 h4 33.Nf5 Be5 34.Ne7 d4 35.ed4 Bd4 36.Rd4 Kd4 37.h3 Ke5 38.Kh2 Kf6 39.Nd5 Ke5 40.Ne3 Kf4 41.Ng4 Kf5 42.Kg1 Kf4 43.Kf1 Ke4 44.Ke2 Kf5 45.Ke3 Kg6 46.f4 gf4 47.Kf4 Kh5 48.Nh2 Kg6 49.Kg4 Kf6 50.Nf3 Kg6 51.Nh4 Kf6 52.Nf5 Ke5 53.Kg5 Ke4 54.h4 (54.h4 Ke5 55.h5+–) 1–0. Trkn – Superfish, itsyourturn.com, 2000.

4.c4 Qb6?? 5.c5 Qb7+= 6.a5 d5 7.d4 e6 8.Nf3 Nd7 9.Bd3+= g6 10.0–0 Be7 11.Bb2 0–0–0 12.Nc3 Ngf6 13.e4 Nb8 14.e5+/– Nfd7 15.Bc1 f5 16.ef6 Bf6 17.Bg5 Rde8 18.Ne2 Qc7 19.Ng3 Bd8 20.Qe2 e5 21.Ne5?? Ne5?? 22.de5 Re5 23.Bf4 Nd7?? 24.Be5+– Ne5 25.Rfe1 Nd3 26.Qd3 Bf6 27.Re6?? Ba1–+ 28.Ne2 Kb8 29.Nf4 Bc8 30.Nd5 Be6 31.Nc7+– Kc7 32.Qd6 Kb7 33.Qe6 Rd8 34.Qe7 Kc8 35.g3 Bc3 36.Qe4 Bb4 37.Qb4 Kb7+– 38.a6 Ka6 39.Qa3 Kb7 40.Kg2 Rd7 41.f4 h5 42.Kf3 Rd4 43.Qe3 Rc4 44.h4 Ka6 45.g4 b4 46.Qd3 Kb5 47.f5 Kc5?? 48.Qe3 Rd4 49.Qe7 Kb5 50.gh5 gf5 51.h6 Rh4 52.Qh4 b3 53.h7 b2 54.Qh1 Kb4 55.h8Q Ka3 56.Qb8 a5 57.Qb1 f4 58.Q1b2 Ka4 59.Qa2 (59.Qf4 1–0. Trkn – PsychoticNeurotic, itsyourturn.com, 2000.

4.Nf3 e6 5.Bb2 Nf6 6.Bd3 (6.ab5!? Bb5 7.Bb5 cb5 8.Bf6 Qf6 9.Na3 Bb4 10.Nb5+–) 6...Bb4= 7.Qe2 0–0 8.0–0 Be7 9.e4 (9.Nc3 b4 10.Ba6 Na6 11.Qa6 bc3 12.Bc3 Ne4=) 9...Qb6 (9...Nh5 10.ab5 Nf4 11.Qe3 Nd3 12.Qd3 cb5 13.Re1=+) 10.e5 Nd5 11.Qe4 g6 12.c3 (12.Nc3 b4 13.Nd5 cd5=+) 12...ba4 13.Ba3 (13.Ba6 Qb2 14.Qa4 Na6 15.Qa6 Qb5–/+) 13...Bd3 (13...f5!? 14.ef6 Nf6–/+) 14.Qd3 Ba3 15.Na3 Ne7 (15...f6 16.Nc4 Qa6 17.ef6 Rf6 18.Nfe5=+) 16.Nc4= Qa6 17.Ng5 Nf5 (17...Nd5 18.Qh3 h5 19.Nd6=) 18.Ne4 Kg7 (18...d5 19.ed6 Nd7 20.Qe2=) 19.Qe2 Ne7 20.d3 f5?? (better 20...Nd5+=) 21.ef6+– Rf6 22.Nf6 Kf6 (22...c5 23.Qe5 Kf7 24.Ra4 Qc6 25.Nd6 Qd6 26.Qd6 Kf6 27.Rf4 Nf5 28.Qf8 Ke5+–) 23.Qe5 Kf7 24.Nd6 (24.Nd6 Kg8 25.Qf6+–) 1–0. DEFFM – GuestQLVW, freechess.org, 2018.

3.e3! Nc6??

4.ab5+– Nb4 5.ba6 (5.Ra6?! Na6 6.ba6 e6+–) 5...Qc8 (5...Rb8 6.c3 Nc6 7.d4+–) 6.c3 Nc6 7.d4 Nb8 (7...e6 8.Nf3+–) 8.Nf3 c6 (8...Nf6 9.Bd3+–) 9.Ne5 (better is 9.e4+–) 9...c5 (9...d6 10.Nf3+–) 10.Qb3 (better is 10.Qf3 f6 11.Qa8 fe5 12.Qa7+–) 10...cd4 (10...e6 11.d5 Qc7 12.Nf7 Kf7+–) 11.Qf7 Kd8 12.Qf8 Kc7 13.Qg7 (better is 13.Qc8 Kc8 14.Nf7 Nf6 15.Nh8 dc3 16.Nc3 Nc6+–) 13...dc3 (13...Nf6 14.Qe7 Qf8 15.Qf8 Rf8 16.cd4+–) 14.Nf7 (better is 14.Nc3 Qe8 15.Nb5 Kc8+–) 14...Nf6 15.Nh8 c2 16.Nc3 Kb6 17.Na4 (better is 17.Ra3 Qe8 18.Rb3 Kc6+–) 17...Kc6 18.Qg5 (better is 18.Qe7!? Kc7 19.Qe5 d6 20.Qa5 Kd7 21.Qf5 Kc7 22.Qf6 Nd7 23.Qc3 Kd8 24.Qa5 Ke8 25.Qh5 Kd8 26.Qg5 Ke8 27.Qg8 Ke7 28.Qh7 Kd8 29.Nf7 Kc7+–) 18...Na6 19.Bb5 (19.Ra2 Kd6 20.f4 Qc3 21.Nc3 Nc5 22.Bb5 e6 23.Ra6 Na6 24.Qe5 Ke7 25.Nd5 Nd5 26.Qg7 Kd6 27.Qd7 Kc5 28.Ba3 Kb6 29.Qc6 Ka5 30.Qa6) 19...Kb7 20.Nc5 (better is 20.Nf7 Nb4 21.Qe5 Nfd5+–) 20...Nc5 21.Nf7 Nce4 (21...a6 22.Be2 Nd3 23.Bd3 Qc3 24.Ke2 Qa1+–) 22.Qf5 (22.Ba6 Kc7 23.Qa5 Kb8 24.Qb5 Kc7 25.Qc4 Kb6 26.Bc8 a5 27.Qb3 Kc6 28.Qb7 Kc5 29.Ba3 Kc4 30.Ne5 Kc3 31.Bb2) 22...Qc3 23.Bd2?? (better is 23.Ke2 Qa1 24.Ng5 Nc3 25.Kf3+–) 23…Qd2 (24.Kf1 Qd1 25.Rd1 cd1Q; 23...Qa1?! 24.Ke2 Qh1 25.Ba6 Ka6 26.Qa5 Kb7 27.Qb5 Kc7 28.Ba5 Kc8 29.Qa6 Kb8 30.Qb5 Kc8 31.Qa6 Kb8 32.Qb5 Kc8=) =. kamera – jpu4, GameColony.com, 2002.

4.ab5+– Bb5 5.Bb5 a6 6.Bc6 dc6 7.Qf3 Qd7 8.b5 Qd5 (8...a5 9.bc6 (< 9.Qc6 Qc6 10.bc6 e6+–) 9...Qd8 10.Nc3+–) 9.ba6 e6 10.Ne2 Qf3 11.gf3 Be7 12.Bb2 f6 13.d3 Nh6 14.Nd2 0–0 (14...Kd7 15.a7+–) 15.Nd4 Rfb8 16.Nc4 Nf7 17.Nc6 Re8 18.f4 g5 (18...Bd6 19.Ke2+–) 19.Ne7 Re7 20.Bf6 Ree8 21.Rg1 Rab8 (21...Reb8 22.Ke2+–) 22.fg5 Rb5 (22...Ra8 23.g6 hg6 24.Rg6 Kf8 25.a7+–) 23.g6 hg6 24.Rg6 Kh7 25.Rg7 Kh6 26.Rf7 Kg6 27.Re7 Rc8 28.Be5 Re5 29.Ne5 Kf6 30.Nc6 Rh8 31.Ra4 Rh2 32.a7 (32...Rh1 33.Kd2 Rd1 34.Kd1 e5 35.a8Q e4 36.Qf8 Kg5 37.Rg7 Kh4 38.Qh8) 1–0. marekt – Honour, ChessWorld.net, 2004.

4.ab5+– Bb5 5.Bb5 Nb4 6.c3 Rb8 7.Be2 Na2 (7...Nc6+–) 8.Ba3 e6 (8...Nc3 9.Nc3 a5 10.Qa4+–) 9.Bf8 Kf8 10.Ra2 1–0. DEFFM – GuestKNJR, freechess.org, 2018.

4.ab5+– Bb5 5.Bb5 Nb4 6.Nf3+–.

4.ab5+– Bb7 5.bc6 Bc6 6.b5 Bb7 7.Nf3 c6 8.bc6 Bc6 9.Bc4 d5 10.Be2 Nf6 11.0–0 e6 12.Ne5 Qc8 13.Nc6 Qc6 14.Nc3 0–0–0 15.Ra7 Rd7 16.Bb5 Qc5 17.Bd7 Nd7 18.Ra2 d4 19.ed4 Qd4 20.Qf3 Ne5 21.Qa8 (21...Kd7 22.Qb7 Ke8 23.Ra8 Qd8 24.Rd8 Kd8 25.Bb2+–; 21.Ra8 Kc7 22.Nb5 Kb6 23.Rb8 Kc5 24.Ba3 Qb4 25.Bb4 Kb4 26.Qc3 Ka4 27.Ra1 Ba3 28.Ra3 1–0. Woelfelschneider,Peter (2155) – Klein,Gabi, remoteschach.de, 2005.

3.e3! e6

4.ab5 Bb7 5.c3 d5 6.d4 Nf6 7.Nf3 Qc8 8.Bd3+/–.

4.ab5 c5?? 5.ba6+– cb4 6.Qf3 d5 7.Bb2 b3 8.cb3 Qb6 9.Bc4 Nf6 10.Bf6 gf6 11.Ne2 Nc6 12.Bd5 ed5 13.Qd5 Rd8 14.Qe4 Ne5 15.0–0 Qb3 16.d4 Bd6 17.de5 fe5 18.Nbc3 Qe6 19.f4 Rg8 20.Qh7 Qg4 21.Ng3 Rg7 22.Qh5 Qe6 23.fe5 Be5 24.Nf5 Bc3 25.Qh8 Kd7 26.Rfd1 Kc7 27.Qd8 Kc6 28.Rd6 Kc5 29.Qc7 Kb4 30.Rb1 Ka3 31.Qc3 Ka4 32.Qb4 1–0. Trkn – Brillbilly, itsyourturn.com, 2000.

2.a4 Bb7

3.Bb2 (--> 2.Bb2 Bb7 3.a4).

3.ab5 e6 4.c3 d5 5.Nf3 Nf6 6.d4 Bd6 7.Bg5 0–0 8.Nbd2+/–.

3.ab5 Nf6 4.e3 e5 5.c3 Be7 (5...d5 6.Nf3 Nbd7 7.Be2+=) 6.Nf3 e4 7.Nd4 0–0 8.Nf5 (better 8.Na3 a5 9.ba5 Ra5 10.Bb2+=) 8...c6? (8...d5 9.d4+–) 9.Ne7 (better 9.b6!? a6 10.d3 ed3 11.Bd3+–) 9...Qe7+= 10.Be2 (better 10.Na3+=) 10...d5?? (better 10...cb5 11.Bb5 Qe6+=) 11.bc6+– Nc6 12.b5 Ne5 13.Ba3 Qe6 14.Bf8 Kf8 15.Qa4 Qb6 (15...Nfd7 16.Qb4 Kg8 17.0–0+–) 16.0–0 Nfd7 17.Qd4 Qd6 (17...f6+–) 18.Ra7 Ra7 19.Qa7 Nc5 (19...Bc8 20.Na3+–) 20.f4 ef3 (20...Ned7 21.Na3+–) 21.Bf3 (21.gf3!? Ned7 22.d4 Qe7 23.dc5 Qe3 24.Rf2 Nc5+–) 21...Nf3 22.Rf3 (22.Rf3 Qc7 23.Rf4+–) 1–0. GuestBHFS – GuestPZZB, freechess.org, 2020.

3.ab5 h5 4.Nf3 h4 5.Na3 g6 6.Bb2 f6 7.Nc4 Bg7 (7...e5+–) 8.Na5 Bd5 9.c4 Be6 10.e3 d5 11.Nb7 Qd7 (11...Qc8 12.Nc5 Nh6 13.Bd3+–) 12.Nc5 Qd6 13.Ne6 Qe6 14.Bd3 dc4 (14...Rh6 15.Qc2 Nd7 16.cd5+–) 15.Bg6 Kf8 (15...Kd8 16.Qc2 Qg4+–) 16.Nd4 Qb6 17.Qg4 (17.Qg4 e6 18.Ne6 Ke7 19.Ng7+–) 1–0. b4_player – lester, casual, 2013.

3.c3 ba4 4.Qa4 e6 5.d3 c5 6.bc5 Bc5 7.e4 Ne7 8.Nf3.

3.c3 a5 4.ab5 ab4 5.Ra8 Ba8 6.Qa4 Bb7 7.Qb4 e6 8.Qb3.

3.d3 ba4 4.c3 e6 5.Qa4 c5 6.bc5 Bc5 7.Nf3 f5 8.Qc4.

3.d3 a5 4.ab5 ab4 5.Ra8 Ba8 6.e3 Nf6 7.Nf3 e6 8.Be2=.

3.e3 ba4 4.Ra4 e5 5.b5 (5.Bb2 d6+=) 5...Nf6 6.c4 d5 7.cd5 Nd5 8.Nf3 Bd6 9.Bc4?? (9.d4 Nb6 10.Ra1 e4=) 9...Nf6?? (better is 9...Nb6–+) 10.Bb2 (10.d4 ed4 11.Qd4 a6+=) 10...Nbd7 11.Ng5 (11.d3 c6=) 11...Bd5 (better is 11...0–0!? 12.d4 Nb6 13.de5 A) 13...Bg2 14.Rg1 Bc5 15.Qb3+– (15.Rg2 Qd1 16.Kd1 Na4+=); B) 13...Nc4? 14.Rc4 Ne8 15.h4+– (15.ed6?! Qg5 16.Qg4 Qg4 17.Rg4 f5+=); C) 13...Be5 14.Qd8 C1) < 14...Rfd8 15.Be5 (< 15.Bf7 Kf8 16.Be5 Na4+=) 15...Na4 16.Nf7+/–; C2) 14...Rad8 15.Be5 Na4–/+) 12.Bd5+= Nd5 13.Qh5 g6 14.Qg4 (better is 14.Qf3 0–0 15.Ne4+=) 14...Nc5–/+ 15.Ra3 Be7?? (better is 15...Rb8 16.Qf3 0–0 (< 16...Qg5 17.Qd5 0–0 18.0–0=) 17.Qd5 Rb5=+) 16.Be5+/– Bf6? (better is 16...0–0!? 17.Nf3 a5+/–) 17.Bf6 Qf6 18.Ne4 (better is 18.d4!? h5 19.Qg3+–) 18...Qb2+/– 19.0–0?? (better is 19.Nc5 Qb1 20.Qd1 Qb5 21.Qa1+=) 19...Qb5?? (better is 19...f5 20.Nf6 Qf6–/+ (20...Nf6 21.Qc4 Ncd7 22.d4=)) 20.Nbc3 Nc3 21.Rc3 Ne6 (21...f5 22.Nf6 Kf7 23.Qh4+–) 22.Nf6 (22.Rc7! Qf1 23.Kf1 Nc7+–) 22...Kf8 23.Qc4 (better is 23.d4 Qf5 24.Qf5 gf5 25.Nd5+/–) 23...Qc4= 24.Rc4 Ke7 25.Nd5 Kd6 26.Nf4 Nf4 27.Rf4 f5 28.Ra1 Rhb8 29.Rfa4 Rb7 30.h3 c5 31.Kf1 Kc6 32.d4 cd4 33.Rd4 a5 34.Rc1 Kb6 35.Rb1 Ka6 (35...Kc6 36.Rc4 Kd5 37.Rd4 (< 37.Rb7 Kc4 38.Rh7 Ra6–/+) 37...Kc6 38.Rc1 Kb5 39.Ke2=) 36.Ra1 (36.Rd6!? Ka7 37.Ra1+=) 36...Rab8 37.Rd6 Rb6 38.Rb6 Rb6 39.Ra2 Rb4 40.Ke2 Kb5 41.Kd2 a4 42.Kc1 Rb3 43.Kc2 Kb4 44.Rb2 (44.h4!?–/+) 44...Ka3–+ 45.Rb3 ab3 46.Kb1 b2 (better is 46...Kb4–+) 47.f3=+ Kb3 48.e4 fe4 49.fe4 Kc4 50.e5?? (better is 50.Kb2 Kd4 51.Kc1=+) 50...Kd5–+ 51.e6 Ke6 52.Kb2 Ke5 53.Kc2 Kf4 54.Kd3 Kg3 55.Ke4 (55.h4 Kg2 56.Ke3 Kh3–+) 55...Kg2 56.h4 (56.Kf4 Kh3 57.Kg5 h5–+) 56...Kg3 57.h5 gh5 (58.Kf5 h4–+) 0–1. whhodson – lune, Live Game Caissa's Web, 2004.

3.ab5 a6

4.ba6 Ba6 5.d3 Nc6 6.c3 e6 7.Nd2 d5 8.Ra6! Ra6 9.b5 Ra1 10.bc6 Bc5? (Better is 10...Ba3 11.Nb3 Rb1+/–) 11.Nb3 Bf2 12.Kf2 Qf6 (12...Qh4 13.g3 Qa4 14.Ke1+–) 13.Nf3 Qc3 (13...Ra8+–) 14.Na1 Qa1 15.Qb3 Nf6 (15...f6 16.Qb8 Kf7+–) 16.Qb8 Ke7 17.Qc7 Nd7 18.Bg5 Kf8 19.Qd8# 1–0. Trkn – guest1612, ICC, 2004.

4.ba6 Na6 5.b5 Nb4 6.Ra8 Qa8 7.f3 e6 8.Bb2.

4.c4 ab5= 5.Ra8 Ba8 6.cb5 c6 (6...e6 7.Qa4 Bb7 8.Bb2=) 7.e3 (7.bc6!? Bc6 8.Nc3+=) 7...cb5= 8.Bb5?? (8.Nf3 e6=) 8...Nc6 (better 8...Bg2 9.d4 Bh1–+) 9.Bc6 (9.Qa4 Nf6 10.Nf3 e6+=) 9...Bc6= 10.Nc3?? (better 10.Nf3=) 10...Bg2–+ 11.Bb2 Bh1 12.Nd5 (12.b5–+) 12...Bd5 13.Qg4 (13.Ne2 Qb8 14.Nf4 Bc4–+) 13...Nf6 14.Bf6 (14.Qf4 e6–+) 14…ef6 0–1. AleksandrNekhoroshik – JAMESBOND00786, lichess.org, 2021.

3.ab5 c6

4.c4 cb5+= 5.cb5 e6 6.Bb2 Nf6 7.e3 (7.Ra4 d5+=) 7...Bb4= 8.Qb3 Be7 9.Nf3 Bf3 10.gf3 d5 (10...0–0 11.Bd4=) 11.b6+= Nc6?? (11...Nbd7 12.b7 Rb8 13.Ra7+=) 12.Qb5?? (better 12.b7 Rb8 13.Bb5+–) 12...Qd7 (better 12...Kd7 13.ba7 Qc7+–) 13.b7?? (better 13.Ra6 0–0 14.Bf6 Bf6 15.b7+–) 13...Rb8–/+ 14.Bd4? (better 14.Qa4 Rb7 15.Bb5=+) 14...Nd4–+ 15.ed4 Qb5 (better 15...Rb7 16.Nc3 0–0 (16...Rb5?! 17.Bb5 Bd6 18.Bd7 Nd7 19.Ra7=) 17.Qd7 Rd7–+) 16.Bb5–/+ Nd7 (16...Kd8!? 17.Bc6 Kc7–/+) 17.Bc6 Kd8 18.Ra7? (better 18.Ke2!? Bf6 19.Ra7 Bd4 20.Ra4=) 18...Kc7–/+ 19.Ra8?? (19.Bd7 Kd7 20.h3 Bf6–+) 19...Nb6 (better 19...Kc6 20.Ke2 Ra8 21.ba8R Ra8 22.Rc1 Kd6–+) 20.Rb8 Kb8 (20...Rb8 21.Bb5–+) 21.Nc3 (21.Ke2 Nc4–/+) 21...Kc7–+ 22.Bb5 Kb7 23.0–0 (23.Ke2 Bd6–+) 23...Rc8 24.Rb1 Kc7 (24...Bf6 25.Rb4–+) 25.Rc1 (better 25.Ra1 Ra8 26.Ra8 Na8 27.Be8–/+) 25...Nc4 (better 25...Kd8!?–+) 26.d3 (better 26.Nd5 ed5 27.d3=+) 26...Nd2?? (better 26...Nb6 27.Nd5 Kd6=+) 27.Nd5+– Kd6 1–0. AleksandrNekhoroshik – nantek1955, lichess.org, 2020.

4.bc6 Bc6 5.c4 d6 6.b5 Bd7 (6...Bb7 7.d3+/–) 7.Nc3 Qc7 (7...Nf6 8.e4+–) 8.e4 (8.e3 Qb7 9.Be2 e6+–) 8...Qc5 (8...Nf6+–) 9.d4 Qb4?? (9...Qc8+–) 10.Bd2 a6 (10...Bg4 11.Qg4 e6 12.Qd1+–) 11.Nd5 Qb2 12.Bc3 Qa1 13.Qa1 Kd8 (13...Ra7 14.Ba5 Nf6+–) 14.Qa5 Kc8 15.Qc7 1–0. orane (2000) – cumalotforme, Live Game Caissa's Web, 2004.

4.bc6 Bc6 5.c4 e6 6.b5 Bb7 7.Nc3 d5 8.cd5 ed5 9.e3 Bd6 10.Ba3 Be5 11.Nf3 Bc3 12.dc3 Qa5 13.Qd4 Nf6 14.Qe5 Kd7 15.Bd3 Re8 16.Bf5 Kd8 17.Be7 Re7 18.Qd6 Rd7 19.Qf8 Kc7 20.Ra5 Rd8 21.Qc5 Bc6 22.bc6 Nc6 23.Nd4 Rd6 24.Nb5 Kb7 25.Nd6 Kc7 26.Nc8 Rb8 27.Qd6 Kb7 28.Rb5 Ka8 29.Qc6 Rb7 30.Qb7 1–0. wesolyPolak (1645) – cippus, GameColony.com, 2002.

3.ab5 e5

4.c3 d5 5.d4 e4 6.Nh3 Bd6 7.Bg5 f6 8.Bf4 g5 9.Bd6 Qd6 10.e3 h5 11.Be2 g4 12.Nf4 Nd7 13.h3 f5 14.hg4 fg4 15.Bg4 Ngf6 16.Bf5 0–0–0 17.Ra7 Qb6 18.Ra5 Kb8 19.Ne6 Rdg8 20.Nc5 Rg2 21.Bd7 Rhg8 22.Rf1 Nd7 23.Nd7 1–0. marus2 – spok, internet, 2001.

4.c3 Nf6 5.d4 ed4 6.Qd4 a6 7.ba6 Ra6 8.Ra6 Ba6 9.Qe5 Be7 10.e4 Nc6 11.Qf5 Bf1 12.Kf1 0–0 13.Nd2 Re8 14.Ne2 Bd6 15.h3 Re5 16.Qf3 Qa8 17.Qd3 Ne7 18.f4 1–0. themonkey – greg, GameColony.com, 2002.

2.a4 c6

3.Na3 e6 4.c3 (4.ab5 Bb4 5.e4 d5=) 4...a5 5.Qb3 (better is 5.ab5!? ab4 6.cb4 Bb4 7.Bb2=) 5...ab4–/+ 6.cb4 (6.Nc2 bc3 7.dc3 d5–/+) 6...Ra4 7.Nc2 Ra1 8.Na1 f5 (8...Na6 9.Nc2–/+) 9.Nc2 (9.Bb2 Nf6–/+) 9...Nf6 10.Nf3 (10.d4 Na6–/+) 10...Be7 11.e3 0–0 12.Be2 Bb7 (12...Na6 13.d4–/+) 13.0–0 Qb6 (13...Na6 14.Bb2–/+) 14.d4 (14.Bb2 Nd5–/+) 14...Qc7 15.Bb2 (15.Bd3 Qd6–/+) 15...Kh8 16.Ra1 ½–½. Franck,Mirko – Marquardt,Alexander, Schleswig Holstein–ch U17 VR2, 1997.

3.a5 e5 4.e3 Bb4 5.c3 Ba5 6.Ba3 Nf6 7.Qf3 Nd5 8.Qh5 Qf6 9.Nf3 d6 10.Ng5 Bf5 11.g4 Nc3 12.gf5 Nb1 13.Rb1 h6 14.Ne4 Qd8 15.Nd6 Kd7 16.Qf7 Qe7 17.Bh3 Qf7 18.Nf7 Rf8 19.Ne5 Kc7 20.e4 Nd7 21.Rg1 Ne5 22.Rg7 Rf7 23.Rf7 Nf7 24.Ra1 Ne5 25.Ke2 Nc4 26.Bc5 Bd2 27.Ra7 Ra7 28.Ba7 Kb7 29.Be3 Be3 30.fe3 c5 31.f6 Ne5 32.Be6 Ka6 33.f7 Nf7 34.Bf7 b4 35.Bc4 Ka5 36.Bb3 Kb5 37.Kd2 c4 38.Bc2 b3 39.Bb1 Kb4 40.Kc1 Kc3 41.e5 b2 42.Kd1 Kb3 43.Kd2 c3 44.Kd3 c2 45.Bc2 Ka2 46.e6 b1Q 47.Bb1 Kb1 48.e7 1–0. AleksandrNekhoroshik – shivmore, lichess.org, 2020.

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

3.ab5 Bb7 4.bc6 Nc6 5.b5 Na5 (5...Nd4 6.Nc3+–) 6.e3 h6 (6...Nf6 7.Nf3+–) 7.Bb2 f6?? (better 7...a6 8.Nc3 ab5 9.Nb5 Nf6+–) 8.Qh5 g6 9.Qg6 1–0. Silent Move (2115) – sunnyday25, redhotpawn.com, 2016.

3.c3 c6 4.ab5 cb5 5.Na3 a6 6.Nb5 Nc6 7.Nf3 a5 8.e4 Ba6 9.ba5 Na5 10.d4 Nf6 11.e5 Bb5 12.Bb5 Rb8 13.Qa4 Ne4 14.Qa5 Qc8 15.c4 Be7 16.0–0 Bd8 17.Qa3 Rb5 18.cb5 Be7 19.Qa8 Qa8 20.Ra8 Bd8 21.b6 0–0 22.b7 Bc7 23.Ba3 Rb8 24.Rc1 f6 25.Rc7 1–0. Bohnke,H (2005) – Dolezalova,M, 2002.

3.Nc3 ba4 4.Ra4 (4.e4 d5+=) 4...Qb6 (4...d5 5.Nf3+=) 5.e3 (5.e4 e6+=) 5...e6 (5...Ba6 6.d3+=) 6.Ba3= d5 7.Qf3 (7.Nf3 Nf6+=) 7...a5 (7...Nf6!?=) 8.Qg3 (8.ba5 Ra5 9.Bf8 Kf8 10.Ra5 Qa5+=) 8...Nd7 9.Nf3 (9.ba5 Ra5 10.Bf8 Kf8 11.Ra5 Qa5+=) 9...c5 (9...Ne7 10.Bd3+=) 10.bc5+– Nc5 11.Bb5 Bd7 12.Bc5 Bc5?? (better 12...Qc5 13.Bd7 Kd7+=) 13.Bd7+– Kd7 (13...Kf8 14.0–0+–) 14.Ne5 (14.Qg7?! Ne7 15.Ne5 Kc7+–) 14...Ke7 15.Qg7 Rf8 (15...Nh6 16.Qh6 Ke8 17.Qg7+–) 16.Qh8 Bd6 (16...Bb4 17.Qh7 Nf6 18.Qg7 Bc3 19.Ng6 Kd7 20.Nf8 Ke8 21.dc3+–) 17.Ra5! Be5 (17...Qa5 18.Nc6 Double attack (18.Nc6 Decoy)) 18.Nd5! (18.Nd5 Kd6 19.Qe5 Ke5 20.Nb6 Kd6 21.Nc4 Ke7 22.Ke2+–) 1–0. michaelbuss (2770) – deep.thought, ChessWorld.net, 2011.

3.Nc3 e5 4.ab5 Bb4 5.Bb2=.

3.e3 a5 4.ab5 Qb6 (4...cb5 5.Bb5 Bb7 6.Nf3) 5.bc6 (5.Nf3 Bb7) 5...dc6 (5...Nc6 6.b5 Nb4 7.Nf3) 6.ba5 (6.c3 Bf5) 6...Ra5 7.Ra5 Qa5 8.Nf3 e6 (8...e5 9.Nc3) 9.Be2 (9.Bb2 Nd7) 9...Nf6 10.0–0 c5 (10...Qa1 11.Nc3) 11.Na3 Bd7 (11...Be7 12.Nc4 Qc7 13.Bb2) 12.Nc4+– Qc7 13.Bb2 Be7 14.Be5 Qd8 15.Nd6 Kf8 (15...Bd6 16.Bd6 Ne4 17.Bf4+–) 16.Ng5 (16.Nb7 Qc8 17.Qb1 Nc6+–) 16...Bd6 (16...Be8 17.Ne8 Ne8 18.Ne4+–) 17.Bd6 Ke8 (17...Kg8 18.Bc5 h6 19.Nf3+–) 18.Bh5 (18.Bc5!? Bc6 19.Bd4 h6+–) 18...g6 19.Qa1 Nc6 (19...Bc6 20.Bb8 gh5 21.Be5+–) 20.Ne4! e5 (20...Ne4 21.Qh8) 21.Bf3 Ne4 22.Be4 f6 23.Bc5 Kf7 24.f4 (24.d4 Re8+–) 24...Re8 25.fe5 (better is 25.Qa6 Qc8 26.Bd5 Be6 27.Qc6 Qc6 28.Bc6+–) 25...Re5 (25...Ne5 26.Bd4 Kg7+–) 26.Bc6 Rc5 27.Bd7 Rc2 28.Qd4 Rc7 (28...Kg7 29.Ra1+–) 29.Be6! Ke8 (29...Ke6 30.Qd8) 30.Qf6 (30...Qf6 31.Rf6+–; 30.Bd5 Qd6+–) 1–0. Biaggi,Eduardo (2280) – Figueroa,Mario, Martinez Valle op2, 1993.

3.e3 Ba6 4.Nf3 Nf6 5.Nc3 ba4 6.Ba6 Na6 7.Ra4 Qb6 8.Na2 Qb5 9.c3 e6 10.Nd4 Qb6 11.Qe2 Nc7 12.Ra5 (12.e4 c5 13.bc5 Bc5=) 12...Rb8 (better is 12...c5!? 13.Nb3 cb4–/+) 13.Nb3= Nfd5 14.0–0 Bd6 15.Ba3 Nb5 16.Bb2 Nbc7 17.Ra1 0–0 18.Nac1 Rbc8 (18...a6 19.Nd3+/–) 19.Nd3 (19.e4 Nf4 20.Qe3 Qb8+–) 19...Rfd8 (19...Ra8 20.e4 Nf4 21.Qf3+/–) 20.Ndc5 (better is 20.Qf3!? Nf6 21.e4+–) 20...Bc5+= 21.Nc5 d6 22.Na6 e5 23.Nc7 Qc7 (23...Rc7 24.d3+=) 24.R1a4 (24.Ra7 Qb8+–) 24...Nf6 (24...Rd7 25.e4 Nf6 26.c4+=) 25.d4 (25.Ra7 Qb8+/–) 25...e4 (25...Ra8 26.c4 Nd7 27.de5 de5 28.Ra1+=) 26.c4 d5 27.c5 (27.Ra7 Qd6+/–) 27...Rb8 (27...Ra8 28.Bc3=) 28.Bc3 (28.Ra7!? Rb7 29.Rb7 Qb7 30.Qa6+/–) 28...Rb7= 29.g3 Qd7 30.Kg2 h5 31.h3 g5 32.Ra1 h4 33.g4 Ne8 34.f3 f5 35.fe4 fe4 36.Rf1 Qg7 37.Ra6 Rc7 38.Qf2 Qg6 39.Qf5 Qg7 40.Qe6 Kh8 41.Rc6 Rc6 42.Qc6 Rb8 43.Qd5 Nf6 44.Qe6 Rf8 45.d5 (45.d5 Kh7 46.Rf6 Rf6 47.Bf6 Qf6 48.Qf6 Kg8 49.d6 Kh7 50.d7 a5 51.d8Q ab4 52.Qdh8) 1–0. Zellmer,Gustav – Turek,Tomas, Guben op, 2003.

3.e3 Qb6 4.a5 Qc7 5.Bb2 e5 6.Nf3 d6 7.Be2 Nf6 8.c4 a6 (8...bc4 9.0–0=+) 9.0–0 Nbd7 (9...bc4 10.d3 cd3 11.Bd3–/+) 10.d4 (10.cb5 cb5 11.Na3 d5=) 10...ed4 (10...e4 11.Nfd2 bc4 12.Nc4=+) 11.Nd4 Qb7 (better is 11...bc4 12.Qa4 d5=) 12.cb5+/– cb5 13.Bf3 d5 14.Nf5 g6? (14...Rb8 15.Bc3+/–) 15.Ng3?? (better is 15.Nc3 Ne5 16.Bd5 Nd5 17.Nd5 Bf5 18.Nf6 Ke7 19.Nd5 Ke8 20.Be5+–) 15...Bb4+= 16.e4 de4? (better is 16...0–0=) 17.Ne4!+– Qb8?? (17...Qe4 18.Be4) 18.Nf6 Nf6 19.Bf6 (19…0–0 20.Ba8+–) 1–0. CountFromHolland – HOTSUN, HCL–E816 playchess.de, 2003.

3.e3 d5 4.ab5+/– cb5 5.Bb5 Bd7 6.Qe2 (6.Be2 Nf6 7.Nf3 g6 8.Nc3 Bg7 9.b5 Ne4 10.Bb2 0–0) 6...e6 7.Bb2 (7.Bd7 Nd7 8.b5 Ngf6 9.Nf3 Bd6 10.Nc3 0–0) 7...Nf6 (7...Qc7 8.Nc3 Nf6 9.Nf3 Bb4 10.0–0 0–0) 8.Ra4 (8.Bd7 Nbd7 9.b5 Qc7 10.Nc3 Ne5) 8...Be7 (8...Bb5 9.Qb5 Nbd7 10.c3 Qb6) 9.Na3 (9.Nc3 a5 10.Ba3 Ne4) 9...0–0 (9...a5 10.Bf6 gf6) 10.Nf3 h6 (10...a5+/–) 11.Ne5 Be8 12.0–0 Qd6 13.f4 a6 14.Be8 Re8 15.b5 Rc8 16.g4 Ne4 17.f5 f6 18.Ng6 e5 19.b6 Nc5 (19...Qb6 20.Ne7 Double attack (20.Ne7 Deflection)) 20.Nc4 (20.Ne7?! Qe7 21.Ra5 Qb7=) 20...Qd8? (20...dc4 21.Ne7 Double attack) 21.g5 (better is 21.Ba3 Rc6 22.Ra5+–) 21...dc4= 22.Qc4 Kh7 23.Qf7 Na4 24.Ne7 Qe8?? 25.b7 Nb6 26.Qg6 Qg6+– 27.fg6 Kh8 28.Nc8 Nc8 29.bc8Q 1–0. Bettman,J (1870) – Van Heghe,Isabelle, 25th Open, Geraadsbergen BEL, 2009. (=1.e3 c6 2.b4 b5 3.a4)

3.e3 e5 4.ab5 cb5 5.Bb5 a6 6.Qf3 (6.Nf3 Bb7 7.Ba4 e4+/– (7...Nc6 8.Nc3 Bb4 9.Nd5 Bd6 10.Ba3 Ba3 11.Ra3 Nf6) 8.Nd4 Nc6 9.Bc6 dc6 10.Nc3 Nf6 11.0–0 Bb4; 6.Qh5 Bb7 7.Bc4 d5 8.Qe5 Be7 9.Be2 Nc6 10.Qb2 Nf6 11.Nf3 0–0) 6...Ra7 (6...Nc6 7.Bc6 dc6 8.Qc6 Bd7 9.Qd5+/– Nf6 10.Qe5 Be7 11.Nf3 0–0) 7.Qg3 (7.Nc3 Bb4 (7...Rb7 8.Ba4 Nf6 9.Qg3 Nc6 10.Nf3 Bb4 11.Bc6 dc6) 8.Qg3 (8.Nd5 Nf6 9.Nb4 Rb7 10.Bd3 Rb4 11.c3 Rb6) 8...Ne7+/– (8...Nc6 9.Nd5 Bf8 10.Bc6 dc6 11.Qe5 Ne7) 9.Qg7 Rg8 10.Qe5 ab5 11.Ra7 Nbc6) 7...f6 (7...Nc6 8.Bc6 dc6 9.Qe5 Be7 (9...Re7 10.Qc3 Nf6 11.Nf3 Qb6) 10.Nf3+– (10.Qg7? Bf6 11.Qg3 Ba1–+; 10.Bb2 Nf6 11.Nf3 0–0) 10...Nf6 11.Nc3 0–0) 8.Nc3+– Nc6 9.Ba4 Nb4 (9...Nge7 10.Nf3+– Nb4 11.0–0 Rb7) 10.Nge2 (10.Nf3 Ne7+– 11.0–0 Rb7) 10...g5 (better is 10...Ne7+– 11.0–0 Rb7) 11.h4 h6 (11...gh4 12.Qh4 h5+–) 12.hg5 Nc6 (12...a5 13.Rh5+–) 13.Qf3 Qe7 (13...Be7 14.Qh5 Kf8 15.Bb3+–) 14.Nd5 e4 (14...Qe6 15.gf6 Nb4 16.Nec3+–) 15.Qh5 Qf7 16.g6 Qg7 17.Bb2 Kd8 (17...Rb7 18.Ng3 Nce7 19.Ne7 Ne7 20.Ne4 Qg6 21.Nd6 Kd8 22.Qg6 Ng6 23.Bf6 Kc7 24.Nb7 Bb7 25.Bh8 Nh8 26.Bb3+–) 18.Ng3 Ne5 19.Nf4 Ne7 20.Ne4 Rg8 (20...Rb7 21.Bc3 N7g6 22.Nd5+–) 21.Bb3 d5 22.Nc5 Qh8 23.Nfe6 Be6 24.Ne6 Kd7 25.Bd4 Ra8 26.Nf4 Kd6 27.Ra5 Kc7 28.Bd5 Nd5 29.Nd5 Kc6 30.Qf5 Qg7 31.Qe6 Bd6 32.Rc5 Kb7 33.Qd6 Rac8 34.Qb6 Ka8 35.Qa6 Qa7 36.Rc8 Rc8 37.Qa7 1–0. Trokenheim,Marek (2175) – Korn,Lothar, remoteschach.de, 2010.

3.e3 Nf6 4.ab5 cb5 5.Bb5 Qb6 6.Be2 Bb7 7.Nf3 Qb4 8.Nc3 e6?? (better 8...Qb6+=) 9.Rb1+– 1–0. DEFFM – GuestTCLM, freechess.org, 2018.

3.e4 ba4 4.c4 (4.Ra4 d5+=) 4...e6 (4...e5 5.Qa4 Nf6 6.Nf3+=) 5.c5 (5.Ra4 Nf6 6.e5 Ng8+/–) 5...d6 6.d4 dc5 7.dc5 Qd1 8.Kd1 Nf6 9.Nc3 Nbd7 (9...e5 10.Bc4=) 10.Nf3 (10.Ra4 Rb8=) 10...Bb7 11.Bd3? (11.Ra4 Be7+=) 11...Rd8 (11...a5 12.Ra4 ab4 13.Rb4 Nc5 14.Ke2–/+) 12.Ke2 (12.Ra4 Nc5 13.bc5 Rd3 14.Kc2 Rc3 15.Kc3 Bc5 16.Be3 Be3 17.fe3+=) 12...Ng4 (12...a5 13.Ra4 ab4 14.Rb4 Nc5 15.Rd4–/+) 13.Bb2 (13.Na4 Rb8+=) 13...Nde5 (better is 13...a5 14.Na4 ab4+=) 14.Rad1?? (better is 14.Ne5 Ne5 15.Bc2+=) 14...Nd3–+ (14...Rd3?! 15.Ne5 Ne5 16.Rd3–+) 15.Na4 Ndf2 16.Rd8 Kd8 17.Re1 Kc7 18.h3 Ne4 19.hg4 f5 20.Be5 Kc8 21.Rd1? fg4–+ 22.Nd4 Ng5 23.Ke3 h5 24.Kf4 Be7–+ 25.Bg7 Rh7 26.Be5 Rf7 27.Ke3 h4 28.Nb2 h3 29.gh3 gh3 30.Nc4–/+ Rh7 31.Bh2 Rh4 32.Nd6 Bd6–+ 33.cd6 Kd7 34.b5?? cb5 35.Nb5 a6 36.Rc1 Bc6 37.Na7 Re4 38.Kf2 Bb5?? 39.Rc7= Kd8 40.Nc6?? Bc6–+ 41.Rc6 Ra4 42.Rb6 Ra3 43.Rb8 Kd7 44.Rb7 Kd8?? 45.Rb8= Kd7 46.Rb7 ½–½. alaamattar (2245) – grahamtrue (2110), net–chess.com, 2008.

3.e4 Bb7 4.d4+=.

3.e4 e5 4.ab5 Qb6 (4...cb5 5.c3 Bb7 6.Nf3+=) 5.Qh5 d6 (5...Qd4 6.Nc3 Nf6 7.Qf5 Bb4 8.Nf3+=) 6.Bc4+– g6 (6...Nh6 7.Qe2+–) 7.Qf3+– Qc7 (better 7...f5 8.Nc3 Nf6+–) 8.b6! Qd7 (8...ab6 9.Ra8 Pinning (9.Ra8 Deflection); 8...Qb6 9.Qf7 Double attack (9.Bf7 Deflection)) 9.Qf7! Qf7 10.Bf7 Kf7 11.Ra7 Ra7 (11...Nd7 12.Ra8 Ne7+–) 12.ba7 (12.ba7 Na6 13.a8Q+–) 1–0. bulent_2010 – Tony _ R, ChessWorld.net, 2016.

3.Na3 a5

4.ba5 ba4 5.Nc4 =+.

4.ab5? ab4 5.c4 ba3 –+.

4.ab5? ab4 5.c4 Ra3?! 6.Ba3 ba3 7.Ra3 –/+.

3.a5 a6

4.Bb2 Bb7 5.e3 e6 6.Qf3 Bb4?? (better 6...Nf6 7.Nc3 d5=+) 7.Bg7+– 1–0. Janek – Docce, internet, 2018.

4.Bb2 d5 5.e3 f6 6.Qh5 g6 7.Qh4 e5 (7...Nh6 8.Bd3=) 8.Nc3 (8.Nf3 Nh6 9.Bd3=+) 8...h6 (better 8...Nh6!? 9.e4 Kf7=) 9.Be2 Ne7? (better 9...Kf7 10.Nf3 Kg7+=) 10.Qf6+– Rg8 11.Qe5 g5? (11...Nd7 12.Qd6 Bg7+–) 12.Bh5 Kd7 13.h4 (13.Nge2 Bg7 14.Qg3 Nf5+–) 13...Bg7 14.Qh2 Rf8 (14...Qc7 15.hg5 Qh2 16.Rh2 hg5+–) 15.hg5 hg5 (15...Qc7 16.Qc7 Kc7 17.Nb5 cb5 18.Bg7+–) 16.Na4 ba4 17.Bg7 Rf5 18.Bg4 Ke8 (18...Qg8 19.Bf6 Qe6 20.Bf5 Qf5 21.Qh8+–) 19.Nf3 Rf7 20.Qh8 Rf8 (20...Ng8 21.Qg8 Ke7 22.Bf6 Rf6 23.Rh7 Rf7 24.Rf7 Kd6 25.Qd8 Nd7 26.Rf6) 21.Qf8 1–0. guestpljc – guestuudq, internet free game, 2018.

4.Bb2 e6 5.e3 Bb4 6.Bg7 f6 7.Bh8 h6 8.Qg4 Kf7 (8...Ke7 9.Qb4 d6+–) 9.Qg7 (9.Qg7 Ke8 10.Qg8 Ke7 11.Bf6 Kf6 12.Qd8 Kf7 13.Qc8+–) 1–0. guestpmch – guestxvil, internet free game, 2018.

4.Bb2 e6 5.e4 d6 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+–) 6.d4 (6.Nf3!?=) 6...d5+= 7.Bd3 Bb4 8.c3 Ba5 9.e5 Bb7 10.f4 Nh6 11.Nf3 Nd7 12.0–0 Bb6 13.Kh1 (13.Ng5 g6–/+) 13...a5 (13...0–0!?–+) 14.Ng5–/+ White prepares f5 14...a4 (14...g6!?–/+) 15.Ba3 Bc7?? (better is 15...c5=) 16.Ne6?? (better is 16.Qh5 Nf8 17.f5 ef5 18.Bf5+–) 16...fe6–+ 17.Qh5 White prepares f5 17...Nf7 18.f5 Nf8?? (better is 18...Qg5 19.Qh3 Nfe5 20.fe6 Nd3 21.ed7 Kd8 22.Qd3 b4–+) 19.fe6+– g6 20.Bg6 hg6 (20...Ng6?? 21.ef7 Kd7 22.Qg4) 21.ef7 (21.Qh8 Qe7 (21...Nh8?? 22.Rf8) 22.Rf7 0–0–0 23.Be7 Ne6 24.Bd8 Nd8 25.e6 g5 26.e7 Ba8 27.ed8Q Bd8 28.Qe8 a3 29.Qd7 Kb8 30.Qd8) 21...Kd7 22.Qh8 Ba6 (22...b4 23.Bb4 c5 24.Bc5 Be5 25.Qe5 Ra6 26.Ra4 Re6+–) 23.Qh3 Ne6 24.f8Q Qf8 25.Bf8 Re8 26.Rf7 Kd8 27.Nd2 (27.Bd6 Bb6 28.Qh7 Kc8+–) 27...Bc8 28.Qf3 (better is 28.Bg7 Bd7 29.Bf6 Kc8+–) 28...Bd7 29.Bb4 g5 30.Nf1 (30.Rh7!? Nf4 31.g3 Rg8+–) 30...Nf4 31.Ne3 Be6 32.Rf6 Kd7 33.Nf5 Bd8 34.Nd6 (better is 34.Re6 Re6 35.g3 Rg6+–) 34...Rg8 35.Re6! Ke6 (35...Ke6 36.Qg4 Double attack; 35...Ne6 36.Qf7 Double attack) 36.g3 (36.Qg4 Ke7 37.Qf5 Bc7 38.Qf7 Kd8 39.Qg8 Kd7 40.Qe8) 36...Ng6 37.Qf7 1–0. mbarker (2410) – grahamtrue (2165), net–chess.com, 2015.

4.Bb2 f6 5.e3 e5 6.c3 Ne7 7.d4 Nf5 (7...d5 8.de5 fe5 9.e4=) 8.e4+= Nd6 9.Nd2 Qe7 10.de5 fe5 11.Be2 Nc4? (better is 11...Bb7+=) 12.Bc4+– d6? (better is 12...bc4 13.Nc4 Bb7+–) 13.Bb3 Be6 14.Ngf3 Bb3 15.Qb3 Nd7 16.0–0 0–0–0 (16...g5 17.c4+–) 17.c4 h6 (17...Qf7 18.Rfc1 Kb8 19.Qd3+–) 18.cb5 cb5 19.Rac1 Kb7 (19...Kb8+–) 20.Qd5 Ka7 21.Rc7 Kb8 1–0. marekt – edog13, ChessWorld.net, 2015.

4.Bb2 Nf6 5.e3 d5 6.f4 e6 7.Nf3 Be7 8.Ba3 (8.Bf6 Bf6 9.d4 Nd7=) 8...Nbd7 (8...0–0 9.Bd3=+) 9.Nc3 Bb7 (9...0–0 10.Nd4 Qc7 11.Be2=+) 10.Bd3 (10.Be2 Ne4=) 10...0–0 11.0–0 h6 (11...c5 12.bc5 Nc5 13.Be2=+) 12.Qe2 Nh7 (12...Rc8 13.Nd4=+) 13.Qf2 f5 (13...Rc8 14.Nd4=) 14.Nd4+= Rf6 15.Be2 Qc7 16.Qg3 Kh8 17.Qh3 Qd6 18.Qh5 Raf8 19.Bd3 (19.Rab1 Kg8+=) 19...Bc8 20.Rf3 Nb8 21.Rh3 Bd7 (21...R6f7 22.Nf3 Bf6 23.Rf1+=) 22.Nce2 Be8 23.Qf3 Bf7 24.Nc3 Bg8 25.Rf1 Nd7 26.Be2 R8f7 27.Qh5 Ndf8 (27...Nhf8 28.Rg3+=) 28.Rg3 e5 (28...Nd7 29.Rf2+=) 29.fe5+– Qe5 30.Bd3 g5 (30...Bd6 31.Rh3 f4=) 31.Nce2+– f4 (31...Nd7 32.Nf3 Qd6 33.Bb2+–) 32.ef4+– Qd4?? (better 32...Qd6+–) 33.Nd4 Rf4 34.Rf4 Rf4 35.Nc6 Bf6 36.Qe8 Bg7 (36...g4 37.Qc8 d4 38.Qa6+–) 37.Qc8 Nf6 38.Qa6 Ne4 39.Be4 de4 40.Qb5 e3 (40...Be6 41.Re3 Bd7 42.Qb7 Bc6 43.Qc6+–) 41.d4 (41.Qe2 ed2 42.Qd2 Bc4+–) 41...Ne6 (41...Re4 42.Qd3 Bd5 43.Re3 Re3 44.Qe3 Bc6 45.c4+–) 42.Bb2 Nd4 43.Bd4 1–0. Guestcello – Hbmbyzs, internet, 2019.

4.Bb2 Nf6 5.e3 g6 6.Bd4 d5 (6...d6 7.Nc3=+) 7.Nc3 (7.Nf3 Qd6 8.Bc5 Qc7=) 7...Bg7 (7...Nbd7 8.f4 e6 9.g4=+) 8.Nf3 (8.Bd3 Qd6 9.Bc5 Qc7=) 8...0–0 9.Be2 (9.Bb6 Qe8=+) 9...Ne4 (9...Nbd7 10.Ne5=) 10.Bg7 Kg7 11.h4 (11.Qb1 Qd6=) 11...Nc3 (11...Nf6 12.Qc1=) 12.dc3+= h6 (12...h5 13.0–0+=) 13.h5 (13.0–0 Nd7+=) 13...g5 14.Qd4 f6 15.Qd3 (better 15.0–0–0+=) 15...Bg4?? (better 15...Qe8=) 16.Qg6+– Kh8 17.Qh6 Kg8 18.Qg6 Kh8 19.Bd3 f5 (19...Rf7 20.Qf7 Qg8 21.Qe7 Nd7+–) 20.Ng5 Rf7 (20...Nd7 21.Qh7) 21.Nf7 1–0. Barcarola (1670) – cpm50, internet free game, 2018.

4.c3 d5 5.e3 Bf5 6.Qf3 Bb1 7.Rb1 Nf6 8.Bd3 e5 9.Qh3 e4 10.Be2 Be7 11.f3 Nbd7 12.fe4 Ne4 13.Bf3 Ndf6 14.Ne2 Qc8 15.0–0 Qh3 16.gh3 Nd2 17.Bd2 0–0 18.Nd4 Rac8 19.Nf5 Rfe8 20.Bg4 Rcd8 21.Be1 Ne4 22.Nd4 Bg5 23.Rf3 Rd6 24.Kg2 g6 25.Ra1 h5 26.h4 Bh6 27.Bh3 f5 28.Rd1 Bg7 29.Bg3 Ng3 30.hg3 Bd4 31.cd4 Rde6 32.Re1 Kf7 33.Kf2 Kg7 34.Ke2 Re4 35.Kd2 R4e7 36.Bg2 Rd8 37.Rf4 Kf6 38.Bf3 Kg7 39.Bg2 Kf6 40.Bh3 Kg7 41.Rf3 Rde8 42.Rg1 Re4 43.Re1 R4e6 44.Kd3 Re4 45.Bg2 R4e7 46.Rf2 Rd8 47.Rc2 Rd6 48.Rec1 Rc7 49.Rc5 Kf7 50.Bd5 Ke7 51.Bf3 Kf6 52.Rc6 Rcc6 53.Bc6 g5 54.hg5 Kg5 55.Bf3 h4 56.gh4 Kh4 57.Rh1 Kg3 58.Rh5 Kf3 59.Rf5 Kg4 60.e4 Rc6 61.Rf8 Kg5 62.e5 Kg6 63.Ke4 Rc4 64.Ra8 Rb4 65.Ra6 Kf7 66.Rb6 Rb1 67.Kd5 b4 68.Kc4 1–0. alt20 – ginter87, lichess.org, 2015.

4.d4 d5 5.c3 Bf5 6.Bf4 Nf6 7.Nd2 e6 8.Ngf3 Bd6 9.Bd6 Qd6 10.Ne5 Ne4 11.Ne4 Be4 12.f3 Bg6 13.Ng6 fg6 14.e4 0–0 (better is 14...de4!? 15.fe4 0–0=) 15.e5+/– Qe7 16.Be2 Qg5 17.Kf2 Nd7 18.Qd3 Rf5 19.h4 Qg4 20.Raf1 Raf8 (20...Rf7 21.g3+/–) 21.Ke1 Qf4+= 22.Rh3 g5? 23.hg5 Qg5?? 24.f4?? Qg6? 25.Bh5?? Qg2 26.Be2 g6 27.Rg3 Qe4 The backward pawn on f4 becomes a target 28.Qe4+/– de4 29.Rg4?? R8f7 30.Kd2 Kg7 31.Ke3 h5 32.Rh4+/– Nf8 33.Ke4 Nh7 34.Rg1 Kh6 35.Rgh1 Kg7 36.Rg1 g5?? 37.fg5 Kg6?? 38.Bh5 Kg7 39.Bf7 Ng5 40.Rg5! Rg5 41.Be6 Rg3 42.Rg4 Rg4 43.Bg4 Kg6 44.Kf4 Kf7 45.Kf5 Ke7 46.Kg6 Kf8 47.Kf6 Ke8 48.e6 Kf8 49.Bh5 c5 50.e7 Kg8 51.Bg6 Kh8 52.e8Q 1–0. Baer,Cy (1895) – Tortoza,Carlos, CiF, 2008.

4.e3 e6 5.c3 d5 6.d4 Nf6 7.Nd2 Ne4 8.Ne4 de4 9.Qg4 e5 10.Qe4 f6 11.Nf3 Bd7 12.Bd2 Be6 13.Be2 Bd5 14.Qf5 g6 15.Qg4 Bf7 16.de5 h5 17.Qf4 Nd7 18.ef6 Nf6 19.Rd1 Nd5 20.Qe4 Be7 21.Ne5 0–0 22.Nc6 Qd6 23.Ne7 Qe7 24.Qe7 Ne7 25.0–0 Rad8 26.e4 Nc6 27.Bg5 Rd1 28.Rd1 Bb3 29.Rd6 Ne5 30.Ra6 Bc4 31.Bc4 Nc4 32.Rg6 Kh7 33.Rb6 Rd8 34.f4 Rd1 35.Kf2 Rd2 36.Kg3 Nb6 37.ab6 Rd6 38.b7 Rb6 39.Be7 Rb7 40.Bc5 Kg6 41.f5 Kg5 42.Kf3 Rd7 43.g3 Rd3 44.Be3 Kf6 45.h4 Rc3 46.Kf4 Rc4 47.g4 hg4 48.Kg4 Rb4 49.Kf4 Rb3 50.h5 Rb1 51.h6 Rh1 52.Kg4 b4 53.Kf3 b3 54.Ke2 b2 55.Kd3 b1Q 56.Kd4 Rd1 57.Kc5 Qc2 58.Kb6 Rb1 59.Ka7 Qa2 0–1. AleksandrNekhoroshik – dizzostone, lichess.org, 2020.

4.e3 e6 5.c3 Nf6 6.Nf3 Be7 7.Be2 0–0 8.0–0 d5 9.Na3 (9.d4 Qd6=) 9...c5+= 10.Nc2 c4 11.d3 Nc6 12.Ncd4 Nd4 13.Nd4 (13.ed4 Qc7=) 13...Bd7 14.Bb2 Rc8 15.dc4 dc4 16.Qc2 Bc6 17.Nc6 Rc6 18.Rad1 Rd6 19.Rd4 Rd4 20.ed4 Qc7 21.g3 Qc6 22.Re1 Qe4 23.Qd1 Bd6 (23...Qg6!?=) 24.Bf3 Qd3 25.Qd3 cd3 26.Rd1 e5? 27.Rd3?? e4–/+ 28.Be4 Ne4 29.f3 Nf6 30.Kf2 Re8 31.Re3 Kf8 32.Re8 Ke8 33.Ke3 Ke7 34.Ba3 Ke6 35.Kd3 g5 36.c4 bc4–+ 37.Kc4 g4 38.f4–/+ Kd7 39.Bb2 Ne4 40.Bc1 Kc6 41.d5 Kc7 ½–½. Peter,Falco – Hirschberg,Leander, Karl Mala mem op 9th, 2005.

3.a5 Na6

4.c3 e5 5.e3 Bd6 6.Bb2 f6 7.Bd3 (7.Na3 Bc7=) 7...f5 (7...Ne7!?=) 8.Bf5+/– Nf6 9.Nf3 g6 (9...Bc7 10.d3+/–) 10.Bc2+/– Bc7 11.d4 Bd6?? (better is 11...e4 12.Ne5 0–0+/–) 12.de5+– Bc7 (12...Be7 13.ef6 Bf6 14.Nd4+–) 13.ef6 Rf8 (13...d5 14.f7! Kf7 15.Nbd2+–) 14.Nbd2 Rf6 (14...d5 15.e4 Qf6 16.0–0+–) 15.Ne4 Be5 (15...Rf5 16.Nd6 Bd6 17.Qd6 Qf6+–) 16.Ne5 1–0. Janek – greyowl, internet, 2016.

4.c3= Nf6 5.d4=.

4.c3= g6 5.e4 (5.d4 Nf6=) 5...Bg7 (5...Nf6 6.e5 Nd5 7.d4=) 6.d4 e5 (6...Nf6 7.Bd3=) 7.Ba3 (better is 7.de5!? Be5 8.Bb5 cb5 9.Qd5+/–) 7...Nf6 (7...ed4 8.cd4 Qe7 9.Nc3+=) 8.de5= Ne4 9.Qd4 (9.Bd3 d5 10.ed6 Nc3+=) 9...d5+= 10.Bd3 (10.f3 Nd6 11.Bc1+=) 10...Nd6 (10...Bf5 11.Nf3+=) 11.Nf3= 0–0 (11...Bf5 12.Nbd2=) 12.0–0 (12.Bc1 Nf5 13.Bf5 Bf5=) 12...Re8 (12...Nf5 13.Qf4=) 13.Re1 (better is 13.Bc1=) 13...Bg4?? (13...Nf5 14.Qf4=) 14.Nbd2 (better is 14.Qg4 Nc4 15.Bc4 dc4 16.Bc1+–) 14...f5 (14...Bf5 15.Rad1+=) 15.h3 Bf3 16.Nf3 Qc7?? 17.Re2?? Rad8?? 18.Rae1?? Nc4= e5 becomes the focus of attention 19.Bc1 c5+= 20.bc5 Nc5 21.Bg5 Rd7 22.Ra1?? Nb3–+ 23.Rd1 Nd4 24.Nd4 Re5 25.Bf4 Rde7 26.Bc4 Qc4 27.Re5 Be5 28.Re1 Qc3 29.Re5 Qd4 30.Re7 Qf4 31.Ra7 b4 32.Rb7 Qc1 33.Kh2 Qa3 34.Rb5 b3 35.Rd5 b2 36.Rb5 Qa2 37.a6 b1Q 38.Rb7 Qb7 39.ab7 Qa7 (39...Qa7 40.Kg1 g5–+) 0–1. grahamtrue (2110) – vpccosta (2165), net–chess.com, 2008.

3.a5 Nf6

4.e3 g6 5.Bb2 Bg7 6.c4 bc4 7.Bc4 Na6 8.Bc3 Rb8 9.Qb3 d5 10.Be2 Nc5 11.Qa3 Nce4 12.Bd4 Qc7 13.d3 e5 14.Be5 Qe5 15.de4 Bf8 16.Qa4 Bb4 17.Kf1 0–0 18.Qc6 Qa1 19.Bd3 Ba6 20.Qa6 Rfc8 21.Ne2 Ne4 22.f3 Nd2 23.Kf2 Nb1 24.Rb1 Qa5 25.Qa5 Ba5 26.Rb8 Rb8 27.Nd4 Rb2 28.Kg3 Bc7 29.f4 h5 30.Nb5 Bd8 31.Na7 d4 32.e4 Rd2 33.Bc4 d3 34.Nc6 Bb6 35.Ne5 Bf2 36.Kf3 Bg1 37.h3 Rf2 38.Kg3 d2 39.Bb3 Rf1 40.Nf3 d1Q 41.Bd1 Rd1 42.Ng1 1–0. AleksandrNekhoroshik (1655) – Ich2910 (1650), lichess.org, 2020.

4.Nf3 a6 (4...e5 5.c3 (worse 5.Ne5 Bb4 6.c4 d6–/+) 5...e4 6.Nd4=+) 5.Nc3 (5.d4 d5=) 5...Bb7 (5...e5 6.Ba3=+) 6.e3 (6.d4 e5 7.de5 Bb4=) 6...e6 7.Ba3 Be7 (7...d6 8.Be2=) 8.Qb1 (8.Be2 d6=) 8...0–0=+ 9.Bd3 h6 10.0–0 d5 (10...d6 11.e4=+) 11.Qb2 Nbd7 12.Nd4 e5 (12...c5 13.bc5 Nc5 14.Be2=) 13.Nf5 e4 (13...c5 14.Ne7 Qe7 15.bc5+=) 14.Be2+= Ne5 (14...Re8!?+=) 15.Nb5+– ab5? (better 15...Nc4 16.Bc4 cb5+–) 16.Qe5+– Re8 17.Qg3 g6 18.Nh6 Kg7 (18...Kf8 19.f3+–) 19.Nf5 Kg8 20.Ne7 Qe7 21.Bb2 Nh7 22.Bc3 Qg5 (22...Bc8 23.d3+–) 23.Qc7 Qe7 24.Qb6 (24.Qe7 Re7 25.d3 f5+–) 24...Ra6 25.Qd4 f6 26.h4 (26.d3 Bc8+–) 26...Qe5 (26...Bc8 27.f3+–) 27.Qc5 Qe7 (27...Qe6 28.f3+–) 28.Qe7 Re7 29.f3 ef3 30.Rf3 Rf7 31.Raf1 f5 (31...Bc8 32.Rg3 (32.Bf6?! Bg4 33.Bd4 Bf3 34.Rf3 Rf3 35.Bf3 Nf8+–) 32...g5 33.Bd3+–) 32.Rg3 Nf8 33.h5 Kh7 (33...Bc8 34.hg6 Rc7 35.Kf2+–) 34.hg6 Ng6 35.Kf2 Ra8 (35...Rg7+–) 36.Rh1 Kg8 37.Rh8 1–0. Janek – Eelsie, internet, 2018.

3.ab5 cb5

4.Na3 a6 5.Nb5+/– Nc6 6.c3 Bb7 7.Na3 Nf6 8.Nf3 g6 (8...e5 9.Nc4 e4 10.Ng5+=) 9.Bb2 Bg7 10.d4 Ne4 11.e3 0–0 12.Bd3 Nd6 (12...d5 13.0–0+/–) 13.0–0 e5 14.de5 Ne5 15.Ne5 Be5 16.f4 Bg7 17.Bg6 Ne4 (17...Qb6!? 18.Bc2 a5+/–) 18.Bf5+– d5 19.Qh5 h6 20.Qg4 Qf6 (20...Kh8 21.Be4 de4 22.Rfd1+–) 21.Be4 de4 22.Rf2 Qg6 23.Qg6 fg6 24.c4 Bb2 25.Rb2 Rad8 26.b5 Rd3 27.ba6 Ba6 28.Rb6 Bc8 29.Rg6 Kh7 30.Rg3 (30.Rc6 Re3 31.Nb5 h5+–) 30...Rfd8 (30...Be6 31.Nc2 Bc4 32.Nd4+–) 31.Nb5 Rd1?! (31...Be6 32.Nd4 Bc4+–) 32.Rd1 Rd1 33.Kf2 Rd2 34.Ke1 Rc2 (34...Rd3 35.Nc7+–) 35.Kd1 (35.Nd6!? Be6+–) 35...Rc4 36.Nd6 Rc5 37.Ne4 Rd5 (37...Rf5 38.Kc2+–) 38.Ke1 Rd8 (38...Rf5 39.Nd6 Rf8 40.e4+–) 39.Nf6 Kh8 40.e4 Bb7 (40...Ba6 41.Rg6+–) 41.Rg6 (better is 41.e5 Bc8+–) 41...Rf8 (41...Be4 42.Ne4 Re8+–) 42.e5 (42…Ba8 43.f5 Rf6 44.Rf6+–) 1–0. tromar (1970) – rishikesh (1735), GameColony.com, 2002.

4.Na3 a6 5.Nb5 d6 6.e4 Bb7 7.Nc3 a5 8.ba5 Ra5 9.Ra5 Qa5 10.Bb5 Bc6 11.Bc6 Nc6 12.Nf3 e6 13.0–0 Qa1 (13...Nf6!?+/–) 14.Qe2+– Qa7 15.Bb2 Be7? (better is 15...Nf6+–) 16.Nb5 Qd7 17.Bg7 Bf6 18.Bh8 Bh8 19.d4 e5 (19...Na7 20.c4+–) 20.Ra1 (better is 20.de5 Ne5 21.Ne5 Be5 22.f4+–) 20...Qd8 (20...ed4 21.Ra8 Nd8+–) 21.Ra8! Qa8 22.Nc7 Kd7 (22...Ke7 23.Na8 Nd4 24.Qc4 Nf3 25.gf3+–) 23.Na8 Nd4 (23...ed4 24.Qc4 Nge7 25.Qf7+–) 24.Nd4 ed4 25.Qg4 Ke7 26.Qg8 Be5 (26...Kd7 27.Qf7 Kc6 28.Qd5 Kd7 29.Qb7 Ke8 30.Qc8 Ke7 31.Qh8 Kf7 32.Qh7 Ke8 33.Nc7 Kd8 34.Nd5 d3 35.Qe7 Kc8 36.Qc7) 27.Nc7 Kf6 (27...Bh8 28.Nd5 Kd7 29.Qf7 Kc6 30.Qc7 Kb5 31.Qb6 Kc4 32.Qc6) 28.Nd5 Ke6 29.Qe8 1–0. market (1830) – Streiff (1620), GameColony.com, 2002.

4.Bb2 Bb7 5.e3 a5 6.ba5 Ra5 7.Nf3 Ra1 8.Ba1 Qa5 9.Nc3 The isolani on b5 becomes a target 9...b4 10.Nb5 Ba6 11.Nfd4 e5 12.Nb3 Qa4? (better 12...Qb6 13.Qe2 Nc6+=) 13.Nc7+– Kd8 14.Na6 (14.Na6 Na6 15.Be5+–; 14.Be5 Bf1 15.Rf1 d6=+) 1–0. DEFFM – GuestGMTD, freechess.org, 2018.

4.Bb2 Bb7 5.f3 Na6 (5...a6 6.d3=+) 6.e3 (6.Na3 Nf6=) 6...Nb4 7.Ba3 (better 7.Bb5 e6 8.Na3=) 7...Nc6 (better 7...Qa5–/+) 8.Bb5+= g6 9.h4 (better 9.Nc3!?+=) 9...Bg7= 10.c3 (10.Bc6 Bc6 11.Nc3 Nh6=+) 10...e5 (10...Nf6!?–/+) 11.Bc6 (11.c4!? a6 12.Bc6 Bc6 13.Nc3=) 11...Bc6=+ 12.Nh3 (12.c4!?=+) 12...Qh4–/+ 13.Ke2? (13.Nf2 Qg3 14.Kf1 Qg5–/+) 13...Qc4?? (better 13...Ne7 14.Nf2 Qg5–+) 14.d3–/+ Qe6 (14...Qh4!? 15.Nd2 d5=+) 15.Ng5= Qf5 16.g4?? (better 16.Ne4 Be4 17.de4=) 16...Qg5–+ 17.Bc1 (17.Nd2 d5–+) 17...Qe7 (better 17...e4!? 18.de4 h5 19.Nd2 hg4 20.f4–+) 18.Ba3 d6 (18...Qe6 19.Nd2 d5 20.Bb4–+) 19.e4 (19.Nd2 Nf6–+) 19...Nf6 20.Bb4 0–0 21.g5 (21.Nd2 Rfd8–+) 21...Nh5 22.c4 (22.Rh5 gh5 23.Nd2 a5–+) 22...Qg5 (better 22...Ng3 23.Kf2 Nh1 24.Qh1 Qg5–+) 23.Bd6 (23.Qg1 Ng3 24.Kd1 Qf4–+) 23...Ng3 (better 23...Qg2 24.Ke1 Qh1 25.Kd2 Bh6 26.Kc2 Qh2 27.Nd2–+) 24.Kf2 Nh1 25.Qh1 Rad8 (better 25...Rfd8 26.c5 Rab8 27.Ra2–+) 26.Bf8 (26.c5 Bh6 27.Ra2 f5–+) 26...Bf8 27.Ra7 Bc5 28.Ke2 (28.d4 Bd4 29.Kf1 Ba7 30.Qh2 Rd1 31.Ke2 Qd8 32.c5 Bc5 33.Qh7 Kh7 34.Nc3 Qd3) 28...Qe3 29.Kd1 Rd3 30.Nd2 (30.Kc2 Qe2 31.Kc1 Be3 32.Nd2 Qd2 33.Kb1 Rb3 34.Ka1 Bd4) 30…Qd2 0–1. venaverme – cesar28, gameknot.com, 2019.

4.Bb2 Bb7 5.Nf3 h6 6.e4 e6 (6...a6!?+=) 7.Bb5+/– Nc6 8.Bc6 (8.0–0!?+/–) 8...Bc6 (white timed out). chessxliv (2140) – valerypavlovich (2100), net–chess.com, 2014.

4.Na3 e5 5.c3+=.

4.Bb2 Nc6+= 5.c3 (5.Nc3 Rb8+=) 5...d5 (5...a5 6.Nf3=) 6.e3+= a6 (6...Qb6!?+=) 7.Bb5!+/– Bb7 (7...ab5 8.Ra8 Pinning (8.Ra8 Deflection)) 8.Ba4 e5 (8...e6 9.Nf3 Nf6 10.Na3+/–) 9.Qh5 (9.Nf3 Bd6 10.c4 dc4+/–) 9...Qc7 (better is 9...Bd6!?+=) 10.Nf3+/– g6? (better is 10...e4 11.Qe5 Qe5 12.Ne5 Nge7+/–) 11.Qg4?? (11.Qe5! Qe5 12.Ne5 Nge7+–) 11...f5? (better is 11...Bg7+=) 12.Qg3+– 0–0–0 13.0–0 Bg7 14.d4 Re8? 15.Bc6 Qc6 16.Nbd2 e4 17.Ne1 Nf6+/– 18.Nb3 Nh5 19.Qh3 Kb8 20.Nc5+– Bf8 21.g4 fg4+/– 22.Qg4 Bc8 23.Qe2 Bc5 24.bc5 Bh3?? 25.Ra6+– Qd7 26.Rb6 Kc8 27.Qa6 Kd8 28.Rd6 Bf1 29.Rd7 Kd7 30.Qd6 Kc8 31.Kf1 Rd8 32.Qa6 Kd7 33.Qd6 Kc8 34.Qe6 Kc7+– 35.Nc2 Ng7 36.Qb6 Kc8 37.c6 Rd6 38.Qb7 Kd8 39.Qg7 Re8 40.Nb4 Re7 41.Qf8 Kc7 42.Qe7 Kb6 43.Qd6 g5 44.c7 Kb7 45.Qd8 Kb6 46.Qb8 Ka5 47.Nc6 Ka4 48.Qb4 1–0. Baer,Cy (1895) – Tortoza,Carlos, CiF, 2009.

4.Bb2 e6 5.Nf3 Nf6 6.c3 Be7 (6...Bb7 7.e3 a6 8.Be2=) 7.e3+= d5 (7...Qb6 8.Na3+–) 8.Bb5+– Bd7 9.Bd3 0–0 10.Ne5 Qc7 11.Ng4 (11.f4 a5+–) 11...Ng4 12.Qg4 e5 13.Qe2 (13.Qh5 g6 14.Qh6 Re8+=) 13...f5 14.Bc2 e4 15.d4 (15.Bb3 Be6+=) 15...Nc6 16.Nd2 (16.Ba3 Rfb8+=) 16...Bd6 (16...Nb4 17.Bb1 Nc6 18.Ba3=+) 17.g3 (17.Bb3 Be6+=) 17...Rf6 (better 17...Nb4!? 18.Bb1 Nc6=+) 18.Bb3+= Be6 19.c4 (better 19.f3!?+=) 19...Nb4 20.0–0 Nd3 (better 20...Be7=) 21.Bc3?? (better 21.cd5 Bf7 22.Ba3+=) 21...dc4–+ 22.Ba5 (22.Ba4 Bd5–+) 22...Qc6 (22...Qf7 23.Bc2–+) 23.Ba4 (23.Nc4 Rb8 24.Ne5 Be5 25.de5 Ne5–/+ (worse 25...Rb3 26.ef6 gf6 27.Rfb1+=)) 23...Qb7 24.Rfb1 Qf7 25.Bc6 Rc8 26.Bb7 Rb8 27.Bc6 Qf8 (27...Nb4 28.Bb4 Rb4 29.Rc1–/+) 28.Ra4 (better 28.d5 Ne5 29.Bc3 Nc6 30.Qc4 Rb1 31.Rb1=) 28...Rb1–/+ 29.Nb1 Qb8 30.Nd2 Nc1 (better 30...Bf7 31.d5 Qb2–+) 31.Qd1 Nb3 32.Rb4?? (32.d5!? Na5 33.Ra5=) 32...Qf8 (better 32...Bb4 33.Nb3 cb3 34.d5–+) 33.d5?? (better 33.Ra4 Na5 34.Ra5=+) 33...Nd2 (better 33...Na5 34.Ra4 Nc6 35.de6 c3–+) 34.Qd2= Bb4 (better 34...c3!? 35.Qc3 Bc8= (worse 35...Bb4 36.Bb4 Qd8 37.de6 Qd1 38.Qe1 Qe1 39.Be1 Re6 40.Bd5+–)) 35.Bb4+– Qb8 (better 35...Qd8 36.de6 Qd2 37.Bd2 Re6+–) 36.de6+– Re6 37.Bd5 (37.Qd5 Qe5 38.Qd7 Rc6+–) 37...Kf7? (better 37...Qc8+–) 38.Bc4 a5 (38...Qc8 39.Qd5 (39.Be6?! Qe6 40.Qd4 a6+–) 39...Kf6 40.Ba5+– (40.Qe6?! Qe6 41.Bc3 Qe5 42.Be5 Ke5+–)) 39.Be6 (39.Qd7 Kg8 40.Bc3 Qb1 41.Kg2 Qh1 42.Kh1 Kf8 43.Bg7 Kg8 44.Be6) 39...Ke6+– 40.Qa2 Kf6 41.Ba5 (better 41.Bc3 Ke7 42.Bg7+–) 41...Kg6 (41...g6+–) 42.Qe6 Kh5 (42...Kg5 43.Kg2 Qf8+–) 43.Qf7 Kh6 44.Qf5 (44.Bc3 Qf8 45.Qf8 Kg6 46.Qg7 Kh5 47.Qh7 Kg5 48.h3 f4 49.ef4) 44...Qb1 (44...Qd6 45.Qe4 Qc5 46.Bd8+–) 45.Kg2 Qd1 46.Qf4 g5 47.Qf6 (47.Qe4 Qd7+–) 47...Kh5 48.Bd8 Qf3 49.Qf3 ef3 50.Kf3 g4 51.Kf4 h6 (51...Kh6 52.Kg4 Kg7 53.f4+–) 52.e4 (better 52.Bg5 Kg6 53.Bh6 Kf6+–) 52...Kg6 53.Ba5 (better 53.Kg4!? Kf7 54.f4 Ke8+–) 53...h5 54.e5 Kf7 55.Kf5 h4 56.gh4 g3 57.hg3 Kf8 58.h5 (58.Kf6 Kg8 59.e6 Kf8 60.h5 Kg8 61.e7 Kh7 62.e8Q Kh6 63.Qg6) 58...Kf7 59.h6 (59.h6 Kg8 60.e6 Kf8 61.h7 Kg7 62.Bc3 Kh7 63.e7 Kh6 64.e8Q Kh7 65.Qg6) 1–0. sirgeshdb – bernsteinabglanz, lichess.org, 2020.

4.c3 Bb7 5.Nf3 Nc6 6.e4 a6 7.d4 Nf6 8.Bd3 e6 9.0–0 d6 10.Bg5 h6 11.Bf4 e5 12.de5 de5 (better is 12...Nh5!? 13.Be3 de5+/–) 13.Ne5+– Ne5 14.Be5 Ng4 15.Bd4 h5 16.f3 Nf6 17.Qe2 Bd6?? (17...Qc7+–) 18.e5 (18…Qe7 19.Re1 Be5 20.Be5+–) 1–0. Marre – jasiek50, zagraj.pl, 2003.

4.c3 d5 5.e4 de4 6.Bb5 Bd7 7.Bd7 Nd7 8.Ne2 (8.d3 a5 9.ba5 ed3 10.Qd3 Ra5 11.Ra5 Qa5=) 8...Ngf6 9.0–0 e6 10.Qa4 (10.d4 Bd6=) 10...Be7 (10...Bd6 11.Ba3=+) 11.Nd4 0–0 (11...Bd6 12.Qa6 Qb8 13.h3=) 12.Nc6 Qe8 13.Na7 (better is 13.Rd1!?=) 13...Bd6=+ 14.Qa6 Bb8 (14...Qb8 15.d3 Bh2 16.Kh1 Bc7–+) 15.Qb7= Ba7 16.Ra7 Ra7 17.Qa7 Qb8 (17...Ne5!?=) 18.Qb8+= Rb8 19.Rd1 Nb6 (19...Ra8 20.d4 ed3 21.Na3+= (21.Rd3? Ra1–+)) 20.Kf1 Nc4 21.Na3 Ne5 22.Nc2 (22.d4 Nd3 23.Be3 Nd5+/–) 22...Nd3 23.h3 Rd8 24.Ba3 h6 25.g3 Ne8 26.Ke2 Nd6 27.Ne3 f5 28.Rb1 Nb5 29.Bc1 g6 30.h4 (30.Bb2 Nd6+/–) 30...h5 31.Nd1 Nc1 (31...e5!?+=) 32.Rc1+/– Nd6 33.c4 Rb8 34.b5 Nb5 (better is 34...Rc8 35.b6 Rc6+–) 35.cb5 Rb5 36.Rc7 Rb6 37.Ne3 Kf8 38.Nc4 Ra6 (38...Rb5+–) 39.Ne5 (39...Kg8 40.Ng6+–) 1–0. Ritschel,Stephan – Guggenberger,Simon, RSS7E easy–2, 2003.

4.c3 e5 5.Nf3 d6 6.e4 f5 (better is 6...Qb6!?) 7.Bb5+– Bd7 8.Qe2 fe4 9.Qe4 Bb5 10.Qa8 Nf6 11.Qa7 Ne4 (11...Nd5 12.Qa5 Nc7 13.d4+–) 12.Na3 Qh4 (12...Bd7+–) 13.Nh4 (13...Bd7 14.Qb8 Kf7 15.Nc4+–) 1–0. Trkn – guest4231, ICC, 2005.

4.Nc3 Ba6 5.e3 e6 6.Qf3 Nc6 7.Ra6 Nb4 8.Bb5 Na6 9.Ba6 Nf6 10.Nge2 Be7 11.e4 0–0 12.e5 Nd5 13.Nd5 ed5 14.Qd5 Qb6 15.Bd3 Rfc8 16.Qd7 Rc7 17.Qh3 Qb1 18.Qh7 Kf8 19.Qh8 1–0. Haertig,Manfred – Daum,Matthias, CM02KT3#20 (year?).

4.Nc3 Ba6 5.e4 e5 6.Qh5 Qe7 7.Nb5 Bb5 8.Bb5 Nf6 9.Qf5 g6 10.Qf3 Bg7 11.Ba3 0–0 12.Bc4 d6 13.Ne2 Nc6 14.0–0 Nd4 15.Nd4 ed4 16.d3 Rae8 17.b5 d5 18.Be7 Re7 19.ed5 Rfe8 20.Ra6 Bh6 21.Rf6 Bc1 22.d6 1–0. marekt – MatthewThomas, ChessWorld.net, 2003.

4.Nc3 Qb6 5.e3 Ba6 6.Qf3 Nc6 (6...Bb7 7.Qf4 Nf6+/–) 7.Nd5+– Qb7 8.Ra6! Nb4 (8...Qa6 9.Nc7 Double attack (9.Nc7 Decoy)) 9.Nf6! (9.Nf6 Nf6 10.Qb7+–) 1–0. usingprogram (1960) – bananinha (1695), kurnik, 2011.

4.Nc3 Qb6 5.e3 Nf6 6.Nb5 a6 7.Nf3 h6 8.Na3 (8.c3 Bb7 9.Nbd4 d6+–) 8...g5 (better 8...Qb4!? 9.Rb1 Qg4+=) 9.Nc4 Qc6 10.Bb2 d6 (10...d5 11.Nce5 Qb7 12.c3+–) 11.b5! ab5 (11...ab5 12.Nd6 Double attack; 11...Qb5 12.Nd6 Double attack) 12.Nd6! ed6 (12...Qd6 13.Ra8 Deflection (13.Ra8 Overloading); 12...ed6 13.Bf6 Deflection (13.Bf6 Overloading)) 13.Bf6 Rg8 14.Bb5! Qb5 15.Ra8 Nd7 (15...Rg6 16.Bd4 d5+–) 16.Rc8 1–0. pcmvr – valerypavlovich, net–chess.com, 2018.

4.Nc3 e5 5.Nb5 Bb4 6.c3 += (worse is 6.Ra7 Ra7 7.Na7 Ba6+=; worse is 6.Na7 Bc5–/+).

4.e3 Ba6 5.Qf3 Nc6 6.Ra6 e6?? 7.Rc6 (7.Bb5?! Nb4 8.Ra4 Nc2 9.Kd1 Nb4+–) 7...dc6 8.Qc6 Ke7 9.Qb7 (worse 9.Qb5 Qc7+–; worse 9.Bb5 Rc8 10.Qa6 Rc2 11.Qa7 Rc7+–) 9...Kf6 10.Nf3 Bb4 (10...Bd6 11.Bb2 Kg6+–) 11.Bb2 e5 12.Ne5 Qd2 13.Nd2 Kf5 14.Qf7 Kg5 (14...Nf6 15.g4 Kg5 16.Qg7 Kh4 17.Qf6) 15.h4 Kh6 16.Ng4 1–0. Janek – nijlo, internet, 2017.

4.e3 Ba6 5.Qf3 d5?? 6.Ra6! Na6 (6...e6 7.Bb5 Ke7+–) 7.Bb5 (7.Bb5 Qd7 8.Bd7 Kd8 9.Bc6+–) 1–0. DEFFM – GuestDLHV, freechess.org, 2017.

4.e3 e5 5.Bb5 Bb4 6.Ba3 Ba3 7.Na3 Bb7 8.Nf3 Qe7 9.Nc4 e4 10.Nd4 Nc6 11.Nf5 Qc5 (11...Qg5 12.Ncd6 Kf8+–) 12.Qg4 g6 13.Nfd6 Kf8 14.Qd7 Nf6 (14...Nge7+–) 15.Qf7 (15.Nb7?! Qb5 (15...Nd7?? 16.Nc5 Nc5 17.Bc6+–) 16.Qf7 Kf7 17.Nbd6 Ke7 18.Nb5 a6+–) 1–0. b4_player – bambi, casual, 2013.

4.e3 e5 5.Bb5 Bb4 6.Qg4 Nf6?? (better 6...Bf8+=) 7.Qb4+– 1–0. DEFFM – GuestNHNJ, freechess.org, 2018.

4.e3 e5 5.Bb5 Bb7 6.Qg4+=.

4.e3 e5 5.Bb5 Nf6 6.Nf3 (6.c3 Bb7 7.Nf3 a5+/–) 6...Qc7 (6...e4 7.Nd4+=) 7.Bb2 Bd6 (7...e4 8.Be5 Qb6 9.Nd4 Bb4 10.f3+/–) 8.Na3 Bb7 (8...e4 9.Bf6 gf6 10.Nd4+/–) 9.Be2 1–0. pierre – shibumi64, internet, 2012.

4.e3 e6 5.Nc3 a6 6.Nb5 Bb4 (6...Bb7!? 7.Na3 Bb4+=) 7.Qg4+/– f5?? (better is 7...Be7 8.Bb2 Nf6 9.Qg7 Rg8+/–) 8.Qg7+– Qf6 9.Bb2 Qg7 10.Bg7 1–0. b4_player – jan, internet, 2013.

4.e3 g6 5.Bb2 Nf6 6.Qf3 (6.Nf3!?+–) 6...Nc6+= 7.Bb5 (7.Nc3 Bb7+=) 7...Bg7 (7...Bb7 8.Ba6 Rb8 9.Bb7 Rb7 10.Bf6 ef6 11.c3+=) 8.Ne2 (8.Nc3 Bb7 9.Nh3 a6=) 8...Bb7 9.0–0 (9.Nbc3 Qb8 10.Qf4 Qf4 11.Nf4 Nb4+=) 9...Qb6 10.Na3 Ne5? (better 10...0–0 11.Qh3 Nb4+=) 11.Qh3+– Bc6 (11...Qc7!? 12.f4 Neg4 13.Qh4+–) 12.Bc6 Nc6 13.b5 Na5 14.Bd4 Qe6 (14...Qc7 15.Nb1+–) 15.Qg3 (better 15.Qe6 fe6 16.Nb1+–) 15...0–0?? (better 15...Rc8+–) 16.Qc7 Nc4 (16...Nc6 17.bc6 Rfc8 18.Qa5 Rc6 19.Rfb1+–) 17.Qc4 Rfc8 (17...Qc4 18.Nc4 Rfc8 19.Ne5+–) 18.Qe6 (18.Qa4 d5+–) 18...de6 (18...fe6 19.d3+–) 19.d3 Nd7 (19...Ne8 20.Nc4 Nd6 21.Nd6 ed6 22.Ra2+–) 20.Nc4 e5 (20...Nb6 21.Nb6 ab6 22.Ra6+–) 21.Ba7 Rc7 (21...e4 22.Ra6+–) 22.b6 Nb6 (22...Rb7 23.Na5 Rb6 24.Bb6 Nb6 25.Nc6+–) 23.Bb6 Ra1 1–0. DEFFM – bazsearle, freechess.org, 2018.

4.e4 a5 5.Bb5 Ba6? 6.Ba6?? (6.Ra5!? e6 7.c3 Bb7 8.Ra8 Ba8+–) 6...Ra6 (better 6...ab4!? 7.Nf3 Na6+=) 7.b5+– Ra8 8.Nc3 e6 9.Nf3 Bb4 10.Bb2 Nf6 11.e5 Ng8 12.0–0 Ne7 (12...d5 13.ed6! Nf6 14.Qe2+–) 13.Ng5 (13.Na2!? Bc5 14.d4 Bb6+–) 13...0–0 14.Qf3 h6?? (14...Ra7 15.Rfb1+–) 15.Ne6 (better 15.Nf7 Rf7 16.Qa8+–) 15...de6 16.Qa8 Qd2 17.Ne4 (better 17.Qf3 Qc2 18.Rab1+–) 17...Qc2+= 18.Ba3 Nd7 (better 18...Nbc6!? 19.Qa6 Qe4 20.bc6 Ba3 21.Ra3 Nc6+=) 19.Qb7+– Ng6?? (better 19...Nd5 20.Bb4 ab4 21.Qd7 Qe4+–) 20.Bb4 (20.Qd7?! Qe4 21.Bb4 ab4+–) 20...ab4 21.Qd7 (better 21.Rfc1 Qe2 22.Re1+– (22.Qd7?! Qe4 23.Qd6 b3+–)) 21...Qe4 22.Rfe1 Qg4 23.h3 (23.Qb7 Qg5+–) 23...Qf4 24.b6 Nh4 (24...Ne5 25.Qc7 f6+–) 25.b7 Qg5 26.Qc6 Qf5 (26...Ng2 27.Qg2 Qd2+–) 27.Ra8 Ra8 28.ba8Q Kh7 29.Qe4 (29.Qce8!? Kg6+–) 29...Qe4 30.Qe4 Nf5 31.g4 g6 32.gf5 gf5 (32...Kg7 33.f6 Kh8 34.Qa8 Kh7 35.Qf8 b3 36.Qg7) 33.Qb1 (33.Qb7 Kg7 34.Qg2 Kf8 35.Rc1 f6 36.Qb7 fe5 37.Rc8) 33...Kg6 34.Qb4 Kg5 (34...Kh5 35.Qe7 Kg6 36.Qf6 Kh5 37.Qf7 Kg5 38.Re4 f4 39.Qe6 f3 40.Qg4) 35.Kg2 (35.Qe7 Kg6 36.Qf6 Kh5 37.Qf7 Kg5 38.Re4 f4 39.Qe6 f3 40.Qg4) 35...Kg6 (35...f6 36.Qe7 Kg6 37.Qf6 Kh5 38.Qe6 Kg5 39.Re4 fe4 40.Qg4) 36.Kg3 (36.Qf8 f6 37.Qf6 Kh5 38.Qf7 Kg5 39.Qe6 h5 40.Qf6 Kf4 41.Qh4) 36...Kg5 (36...f4 37.Kf4 Kh5 38.Qe7 Kg6 39.Rg1 Kh5 40.Rg4 f6 41.Qe8) 37.Qh4 Kg6 38.Qf6 Kh7 39.Rd1 Kg8 (39...f4 40.Kf4 h5 41.Rd8 h4 42.Rh8) 40.Rd8 Kh7 41.Rh8 (41.Qf7) 1–0. AvImd (1760) – zamaluca (1760), lichess.org, 2020.

4.e4 a5 5.Bb5 Bb7 6.Bc4 e6 7.d3 Bb4 8.c3 Bd6 9.Qg4 g6 10.Ba3 h5 11.Qh3 Ba3 12.Na3 Nh6 13.Rb1 Nc6 14.Rb7 Rb8 15.Rb5 Qe7 16.Rb8 Nb8 17.Nc2 0–0 18.Ne2 Nc6 19.Rf1 Ne5 20.Bb3 Nd3 21.Qd3 d5 22.ed5 ed5 23.Bd5 Rd8 24.Qg6 1–0. mtrold1 – opponent, internet, 2001.

4.e4 a6 5.Bb5 e5 6.c3 Bb7 7.Bd3 a5 8.Qh5 g6 9.Qe5 Be7 10.Qh8 ab4 11.Qg8 Bf8 12.Ra8 Ba8 13.Qh7 Qe7 14.f3 bc3 15.Nc3 Nc6 16.Nd5 Qe5 17.Bc4 Qa1 18.Ne2 1–0. COMP – tst1, internet, 2001.

4.e4 Nc6 5.Bb5 a6 6.c3 Qb6 7.Ba4 Nf6 8.d3 e5 9.Na3 d6 10.Be3 Qb7 11.Nc4 Be7?? 12.Na5 Qb6 13.Bb6 Rb8 14.Bc6 Nd7 15.Bc7 Bd8 16.Bb8 0–0 17.Bd6 Re8 18.Nc4 (18...Bf6 19.Nf3+–) 1–0. marekt – mgb, ChessWorld.net, 2004.

4.e4 e5 5.Nf3 Bb4 6.Bb5 Nc6 7.c3 Bd6 8.Na3 Bb7 9.Nc4 Bc7 10.Ba3 d6? (better is 10...Qf6!?+=) 11.d4+– ed4 12.cd4 Nge7? (better is 12...a6 13.Ba4 Kf8+–) 13.d5 a6 14.dc6 ab5 15.cb7 bc4 (15...Rb8 16.Nd6 Bd6 17.Qd6 Rb7 18.Qd8 Kd8 19.Ng5+–) 16.ba8R Qa8 17.0–0 0–0 18.e5 Nc6 (18...Bd8 19.ed6 Nc6 20.d7+–) 19.Bd6 Bd6 (19...Qd8 20.Bf8 Kf8 21.Qd8 Bd8+–) 20.Ra8 Ra8 21.ed6 1–0. Fritz11 – anony, internet, 2013.

4.e4 e5 5.Nf3 Bb4 6.Bb5 Qf6 7.0–0 Ne7 (7...Nc6 8.Bb2) 8.c3+/– Bc3?? (better is 8...Bc5) 9.Nc3 Qb6 (9...Nbc6 10.d3+–) 10.Ne5 Bb7 11.d4 0–0 12.Ba3 (12.Nd7?! Nd7 13.Bd7 Qc7+–) 12...Re8 (12...Rc8 13.Bc4 d5 14.Rb1+– (< 14.Be7 dc4 15.Bc5 Qe6+–)) 13.Nf7! Kf7 (13...Rc8 14.Bc5 Rc5 15.dc5 Qc5 16.Qb3+–) 14.Bc4 Kf8 15.Qf3 (15.Nd5 Qg6 16.Qf3 Qf7 17.Ne7+–) 15...Qf6 (16.Qf6 gf6+–). Gervie – crome, ChessWorld.net, 2005.

4.e4 e5 5.Nf3 Bb4 6.Ne5 Qe7 7.Bb2 f6=.

4.Nf3 Bb7+=.

4.Nc3 a6

5.Nb5+/– Qb6 6.Nc3 Bb7 (6...Qb4 7.e4+=) 7.Nf3 (7.e4 Nf6 (7...Qb4?? 8.Rb1 Qc5 9.Rb7+–) 8.e5 Ne4 9.Ne4 Be4+–) 7...Bf3 (7...e6 8.Rb1+=) 8.ef3+– e6 (8...Qb4 9.Nb5! Qc5 10.Bb2+=) 9.b5 Bb4 (9...Nf6 10.Qe2 a5 11.Bb2+–) 10.Ra4 a5 (10...Ba5 11.Bb2 f6 12.Qa1 ab5 13.Nb5+– (13.Bb5?! Ne7+–)) 11.Bb2+– Ne7 (11...Nf6 12.Ne4 Be7 13.Qa1+–) 12.Ne4 d5? (better 12...f6+–) 13.Bg7 Rg8 (13...de4 14.Bh8 Ng6 15.c3+–) 14.Nf6 Kd8 15.Ng8 Ng8 16.Qa1 Nd7 (16...Qb7+–) 17.Rb4! Ra7 (17...ab4 18.Qa8 Pinning (18.Qa8 Deflection; 18.Qa8 Clearance)) 18.Rg4 Ngf6 (18...Ne7+–) 19.Bf6 Kc7 20.Bd4 Nc5 21.Qc3 Kd6 22.Rg8 Rc7 23.Rd8 (23.Rd8 Nd7 24.Qa3 Rc5 25.Bc5 Qc5 26.Rd7 Kd7 27.Qc5 Ke8 28.b6 Kd7 29.Bb5 Kd8 30.Qc7) 1–0. michaelbuss (2840) – fastrook, ChessWorld.net, 2009.

5.Nb5+/– Qb6 6.e3 Nc6 7.c3 Bb7 8.Na3 Nf6 9.Nc4 Qc7 10.Nf3 d5 (10...e5 11.Na5+/–) 11.Na5 e6 (better is 11...Na5!? 12.Ra5 Nd7+/–) 12.Nb7+– Qb7 13.Qa4 Be7?? (13...Nd7+–) 14.Ne5 (14.Ne5 0–0 15.Nc6+–; 14.Ba6?! Qd7+–) 1–0. Woelfelschneider,Peter – McGuire, 2009.

5.Nb5+/– Qb6 6.e3 Nc6 7.c3 Bb7 8.Na3 Nf6 9.Nc4 Qc7 10.Nf3 d5 11.Na5 e6 12.Nb7 Qb7 13.Qa4 Be7? (13...Nd7+–) 14.Ne5 (14.Ba6?! Qd7+–) 1–0. Schellen,Anton – Mcguire,Paul, SN–2009–0–00170, 2009.

5.Nb5+/– Qb6 6.e3 Nf6 7.Nf3 (7.c3 e5+–) 7...e6 (7...Qb7 8.Nbd4+=) 8.Nbd4 (better 8.c3!?+–) 8...Bb4= 9.Rb1 a5? (better 9...Qd6+=) 10.c3+– Nc6 (10...e5 11.Nc2+– (11.cb4?! ed4 12.Nd4 ab4+–)) 11.Nc6 dc6 12.cb4 ab4 (12...Ba6 13.Ba6 Ra6 14.Ba3+–) 13.d4 0–0 14.Bd2 Ne4 (14...Ba6 15.Rb4 Qc7 16.Ba6 Ra6 17.0–0+–) 15.Bb4 Re8 16.Bd3 f5 (16...Nf6 17.0–0+–) 17.Ne5 (17.Be4 fe4 18.Ng5 Qb7+–) 17...Ba6 18.0–0 (18.Be4 fe4 19.Qc2 Bd3 20.Nd3 ed3 21.Qd3 Qb5 22.Qb5 cb5+–) 18...Bd3 19.Qd3 Ra4 (19...Qb5 20.Qc2+–) 20.Qb3 Raa8 (20...Ra6 21.f3 c5 22.fe4 Qb4 23.Qb4 cb4 24.ef5 ef5 25.Rb4+–) 21.Rfc1 Rec8 (21...c5 22.Bc5 Qa5+–) 22.Qe6 Kh8 23.Nf7 Kg8 24.Nd8 Kh8 25.Qe8 1–0. michaelbuss (2805) – Verner201098 (1680), ChessWorld.net, 2012.

5.Nb5+/– Bb7 6.Na3 d5 7.Nf3 Nc6 8.c3 e5 9.Qa4 Bd6 10.Nc2 (10.c4 Nf6+/–) 10...Nge7 11.g3 0–0 12.Bg2 e4 (12...Nc8 13.Qb3+=) 13.Nfd4 f5? (better is 13...Nd4 14.Nd4 Be5+=) 14.Ne6+– Qb6 15.Nf8 Kf8 16.0–0 Ng6 (16...d4 17.Bb2+–) 17.d3 Nge5 18.Be3 h6 (18...Qc7+–) 19.Bb6 1–0. Richter,Wolfgang (2315) – Tortoza,Carlos, CiF, 2009.

5.Nb5+/– Nc6 6.c3 Bb7 7.Na3 Qb6 8.Nf3 d6 9.Nc4+– Qc7 10.Qa4 Nf6 11.Na5+– Nd7 12.Nb7 Qb7 13.b5! Ncb8 14.d4 g6 15.e3 Nb6? 16.ba6 Qd7 17.Qa5 Nd5 18.Qd5 Qa7 19.Bb5 Nd7 20.Bd7 Kd7 21.Ne5 Kc7 22.Qc6 Kd8 23.Nf7 1–0. Buettner,Fritz (2415) – Tortoza,Carlos (1685), CiF, 2010.

4.e3 a6??

5.Bb5! ab5 6.Ra8 Bb7 7.Rb8 Qb8 8.Nf3 Bf3 9.Qf3 e6 10.Bb2 e5 (10...Ne7!?+–) 11.0–0+– 1–0. GuestRVNG – GuestLVKR, freechess.org, 2018.

5.Bb5! Qb6 6.Nc3 Nc6 (6...e6!?+=) 7.Bc6+– dc6 8.Nf3 (8.Ba3 e6+–) 8...e6 (8...Qb4 9.Ne5 Qd6 10.d4+=) 9.Na4 (9.Ba3 Nf6+–) 9...Qb4+= 10.Ba3 (better 10.0–0+=) 10...Qa3? (better 10...Qa4 11.Bf8 Qg4+=) 11.Ra3+– Ba3 12.Qa1 Bd6 (12...Bf8 13.Nb6 Rb8 14.Nc8 Rc8 15.Qa6 Ne7+–) 13.Qg7 Bd7 (13...Rb8 14.Qh8 Kf8 15.Ng5+–) 14.Qh8 Ke7 15.e4 (15.Ng5 Rf8+–) 15...Rb8 (15...h6 16.e5 Bb4 17.c3+–) 16.e5 Rb1 17.Ke2 Rh1 18.ed6 Kf8 19.Ne5 Be8 (19...f5 20.Nd7 Ke8 21.Nac5 Re1 22.Ke1 Kf7 23.Qh7 Ke8 24.Qg8) 20.Nb6 (20.Nc5 Rf1 21.Ned7 Bd7 22.Nd7 Ke8 23.Nf6 Kd8 24.Qg8) 20...Rb1 (20...f5 21.d7 Bh5 22.Kd3 Be2 23.Kd4 c5 24.Kc5 Ke7 25.Qg7 Kd8 26.Qg8 Ke7 27.d8Q) 21.Nbd7 Bd7 22.Nd7 Ke8 23.Nf6 Kd8 24.Qg8 1–0. guestfrdc – guestqaus, internet free game, 2018.

5.Bb5 Qb6 (better 5...ab5 6.Ra8 Bb7 7.Rb8 Qb8+=) 6.c4?? (better 6.Be2+=) 6...Bb7–+ 7.Ba4?? (7.Qg4 ab5 8.c5–+) 7...Qb4 (better 7...Bg2 8.Qg4 Bh1–+) 8.Nf3=+ Nc6 (8...Qc4 9.Bb3 Qc7 10.Bb2=+) 9.Qb3 (9.Na3 Rb8+=) 9...e6 (9...Nf6 10.0–0=) 10.0–0 (10.Qc2 Qd6=) 10...Na5 (10...Qb3 11.Bb3 Nb4 12.Ne1=) 11.Qb4 (11.Qd3 Nf6 12.Ne5 Qd6+=) 11...Bb4 12.Ne5 Rd8 (12...Nc6 13.Nd3 Be7 14.Nc3=) 13.d4+= f6 (13...Nc6 14.Nd3 Be7 15.Ba3+=) 14.Nd3+– White intends c5 14...Be7 15.Bd7! Rd7 (15...Kd7 16.Ra5) 16.Ra5 Rc7 (16...Bd6 17.Nc3+–) 17.c5 Be4 (better 17...Bd8+–) 18.Nf4?? (better 18.Rd1 Ra7 19.Nc3 Bd3 20.Rd3+–) 18...Bb1+= 19.Ne6 The passed pawn on d4 will become decisive later 19...Rc6 (better 19...Ra7+=) 20.Ra6?? (better 20.d5 Re6 21.de6+–) 20...Ra6–/+ 21.Nc7 Kf7 (21...Kd7 22.Na6 Bd3 23.Nb4 Bf1 24.Kf1–/+) 22.Na6 Bd3 23.Nb4 Bf1 24.Kf1 Nh6 (24...f5 25.Ke2–/+) 25.Nd3 (25.e4 g5=) 25...Ra8 (25...Rd8 26.Ke2–/+) 26.Bb2 (26.e4 Ra4 27.Bb2 Ke8=+) 26...Ng4 (26...Ra2 27.e4–/+) 27.h3 Nh6 28.Ke2 Ra2 29.Kd2 Bd8 (29...f5 30.Kc2=+) 30.Kc3 (better 30.d5=) 30...Ba5?? (better 30...Ke7=) 31.Kb3+– Rb2 32.Nb2 Nf5 (32...Ke7 33.e4+–) 33.Nc4 (33.d5!? Ke8+–) 33...Be1+– 34.c6 (better 34.g4!? Ne7 35.f4+–) 34...Ne7= 35.f3 (35.c7!? Nc8 36.f4=) 35...Nc6=+ 36.d5 Ne5 37.Nd6 Kg6 (37...Kf8 38.e4=+) 38.f4= White fights for the Initiative 38...Nf7?? (better 38...Nd3=) 39.f5+– Kg5 40.Nf7 Kf5 41.Nd6 (better 41.g4 Kg6 42.Nd8+–) 41...Ke5+= 42.Ne8 g5? (better 42...Kd5 43.Ng7 Bf2+=) 43.Kc4 Bd2 (43...f5 44.d6+–) 44.e4 h5 (44...Ba5 45.Kb5 Bd8 46.Kc6+–) 45.Kd3 (better 45.Kb5!? g4 46.d6 Bg5+–) 45...Ba5 46.Ke3 (46.Ng7 h4+–) 46...Bb6 (46...f5 47.ef5 Kf5 48.Kd3+–) 47.Kf3 f5 48.ef5 Kf5 49.g4 (49.Nd6 Kf6+–) 49...Kg6? (better 49...hg4 50.hg4 Ke5=) 50.Ke4 (50.d6 Ba5+–) 50...Kf7 (50...hg4 51.hg4 Kf7 52.Nd6 Kf6+–) 51.Nd6 Ke7?? (51...Kg6+–) 52.Nc8 Kf6 53.Nb6 hg4 54.hg4 Ke7 55.Ke5 Kd8 56.Kd6 (56.d6 Ke8 57.d7 Kd8+–) 56...Ke8 57.Kc7 Ke7 1–0. Trkn – benj, itsyourturn.com, 2000.

5.Bb5! Qb6 6.Be2 Bb7 7.Nf3 e6 8.c3 Nf6 9.0–0 Be7 10.d3 d5 11.Nbd2 Nbd7 12.Nb3 0–0 13.Na5 Rab8 14.Nb7 Rb7 15.Nd4 Rc8 16.Bb2 g6 17.f4 Bd6 18.Bf3 Ra8 19.Qd2 e5 20.fe5 Ne5 21.Bd1 Ned7 22.Ba4 Rd8 23.Bc6 Rc7 24.Bd7 Nd7 25.Ra5 Nf6 26.Rf6 Qb7 27.Qf2 Be5 28.Rfa6 Rd6 29.Rd6 Bd6 30.Nb5 1–0. Andersson,Egart – Kimse,Martin, EK 0513 (year?).

5.Bb5 Bb7 6.Be2?? Nc6?? (better 6...Bg2 7.Bf3 Bh1 8.Bh1 Nc6–/+) 7.Nf3 (7.c3 Nb4 8.cb4 Bg2+–) 7...Nb4+= 8.c4 g6 (8...Nf6 9.0–0=) 9.Ba3 Bg7 10.Nc3 (10.d4 Nc6+=) 10...Nc6 (10...Bc3 11.dc3 Nc6 12.0–0=) 11.d4+= Nf6 12.0–0 0–0 13.d5 Na5? (13...Na7 14.Rb1 Rb8 15.Rb3+–) 14.Rb1?? (better 14.Bb4!? Nc4 15.Bc4 a5+–) 14...Qc7 Attacks the backward pawn on c4 (14...d6!?+=) 15.d6 (15.Be7 Rfe8+–) 15...ed6 (better 15...Qc6!?+–) 16.Bd6+– (16.Qd6?! Qd6 17.Bd6 Rfc8=) 16...Qc6 17.Bf8 Bf8 18.Nd5! Nc4?? (18...Nd5 19.Qd2 Double attack (19.Qd2 Decoy)) 19.Bc4 (19.Nf6 Qf6 20.Rb7 Nb6+–) 19...Qc4 (19...Nd5 20.Ne5 Ne3 21.Nc6 Nd1 22.Rb7 Nb2 23.Rb2 dc6+–) 20.Nf6 (20.Rb7?! Qd5 21.Qd5 Nd5 22.Rd7 Nf6+–) 20...Kg7 21.Nd7 (better 21.Rb7 Qc6 22.Qd7 Qf6 23.Ne5+–) 21...Rd8 (21...Bf3 22.Qf3 Re8 23.Qf6 Kg8 24.Rfc1+–) 22.Nde5 (better 22.Rb7 Be7+–) 22...Qe4 (22...Rd1 23.Nc4 (23.Rbd1?! Qe6=; 23.Rfd1?! Qa4+–) 23...Rd7 24.Rfd1+–) 23.Qb3 (better 23.Qd8 Qd5 24.Qe8+–) 23...Re8 (23...Bd5 24.Qc3 Be7 25.Rb6+–) 24.Qc3 (better 24.Qf7 Kh6 25.Rb7 Qb7 26.Ng4 Kh5 27.Qf4 Qe7 28.Nf6 Qf6 29.g4) 24...Re5 (24...f6 25.Nd7 Be7 26.Qc7+–) 25.Qe5 Qe5 26.Ne5 (26.Ne5 Be4 27.Rb6+–; 26.Rb7?! Qd5 27.Rc7 Bc5=) 1–0. alddhsfd (1920) – heikoeale (1900), lichess.org, 2020.

5.Bb5! Bb7 6.Bf1 e5 7.b5 ab5 8.Ra8 Ba8 9.Bb2 Nc6 10.Nc3 (10.Bb5?! Qb6 11.c4 Na7+=) 10...b4 11.Nb5 Nf6 12.Qa1 Be7? (better is 12...Bc5 13.Be5 0–0+/–) 13.Qa8!!+– (13.Be5?! Ne5 14.Qe5 0–0+=) 13...Qb8 (13...Qa8 14.Nc7 Double attack (14.Nc7 Decoy)) 14.Qb8 Nb8 15.Be5 0–0 16.Nf3 Nd5 (16...Nc6 17.Bd3+–) 17.Bc4 Nb6 18.Bb3 Nc6 19.Ke2 Na5 (19...d5 20.Bc7 Nc4 21.Ra1+–) 20.Ra1 Nb3 21.cb3 f6 (21...Ra8 22.Ra8 Na8 23.Kd3+–) 22.Bd6 Re8 (22...Kf7 23.Ra6 Nc8 24.Bg3+–) 23.Nc7 Rc8 24.Be7 Rc7 25.Bd8 Rb7 26.Ra6 Nd5 27.Rd6 Rb5 (27...Rb8 28.Rd7 Nb6 29.Rd4+–) 28.Rd7 1–0. Heini – chessenemy, internet, 2016.

5.Bb5! Bb7 6.Bf1 e5 7.c3 d5 8.d4 e4 9.Nd2 Nf6 10.Nb3 Nc6 11.Nc5 Bc8 (better is 11...Bc5!? 12.dc5 Qc7+/–) 12.Qa4+– Bc5?? (better is 12...Qb6+–) 13.Qc6 (13.bc5?! Bd7+=; 13.dc5?! Bb7+/–) 13...Bd7 14.Qc5 Rc8 15.Qa5 Qe7 (15...Rc3 16.Qd8 Kd8 17.Bd2+–) 16.Ba6 Rc3 17.Ba3 0–0 (17...Rc2 18.b5 Qd8 19.b6+–) 18.b5 Ra3 19.Qa3 Qa3 (19...Qe6 20.Ne2+–) 20.Ra3 Ra8 21.Rb3 h5 22.b6 Ba4 (22...Bc6 23.Rc3 Ra6 24.Rc6 Ra1 25.Kd2+–) 23.b7 Rb8 24.Rc3 Bd7 25.Kd2 Ne8 26.Ne2 Nd6 27.Rc7 Be6 28.Nf4 Nb7 (28...h4 29.Rhc1 Rf8 30.R1c6 Nb7 31.Bb7+–) 29.Bb7 Rb7 30.Rb7 (30...Bg4 31.Nd5+–) 1–0. marekt – Bill Kolt, ChessWorld.net, 2002.

5.Bb5! Nc6 6.c3 e6 7.Nf3 ab5 8.Ra8 Nf6 9.0–0 Qc7 10.Qe2 Qb7 11.Ra2 Nd5 12.e4 Nf4 13.Qe3 e5 14.g3 Nh3 15.Kg2 d6 16.d3 Be7 17.Bd2 h6 18.d4 ed4 19.cd4 Bg5 20.Qa3 Qa7 21.Qa7 Na7 22.Ra7 Bg4 23.Ng5 Ng5 24.Ra8 Bc8 25.Rc8 1–0. Trkn – scandle2, itsyourturn.com, 2000.

5.Bb5! e5 6.Qf3 Ra7 7.Qg3 Nc6 8.Bc6 dc6 9.Qe5 Qe7 10.Nf3 Nf6 11.c3 Qe5 12.Ne5 Bb7 13.d4 c5 14.dc5 Bg2 15.Rg1 Be4 16.Nd2 Bd5 17.c4 Bc6 18.Nc6 Ra8 19.Bb2 Nd7 20.Rg4 f6 21.Rd4 h6 22.Rd5 g6+–. mtrold1 – mustang, internet, 2001.

4.e3 Qb6

5.Na3 a6 6.Nb5 Bb7 7.Nc3 d5 8.b5 ab5 (better is 8...Nf6!?+/–) 9.Bb5+– Kd8 (9...Nd7 10.Ra8 Ba8 11.Bd7 Kd7+–) 10.Ra8 Ba8 11.Nf3 f6 (11...e6 12.Bb2+–) 12.Ba3 Nh6 13.Nd4 Qa5 14.Qa1 e6 (14...Kc8 15.0–0 Nf7+–) 15.Be7!! Be7 (15...Ke7 16.Qa5) 16.Qa5 Kc8 17.Ne6 Bd6 (17...Bd8 18.Qa8 Rf8 19.Nc5 Kc7 20.Qb7 Kd6 21.Qb8 Kc5 22.Na4 Kb4 23.Be8 Bb6 24.Qb6 Ka3 25.Qb2) 18.Qa8 Nf5 (18...Nf7 19.Nd5 Bc5 20.Nc5 Nd6 21.Bd7 Kd8 22.Qa5) 19.Bc6 Ne7 (19...Ne3 20.Qb7) 20.Qb7 1–0. MT – guest1045, ICC, 2004.

5.Na3 Na6 6.Bb5 Nc7 7.Be2.

5.Na3 Bb7 6.Nb5 Bc6 (6...Nc6 7.c3) 7.Qh5 (7.Nd4 Qb4 8.Ba3 Qb6) 7...a6 8.Nd4 g6 (better is 8...Qb4!? 9.Nc6 dc6) 9.Qa5+– Qa5 10.Ra5 Bg7 (10...Bb7 11.c3) 11.Nc6 dc6 (11...Nc6 12.Ra4 (12.Ra6?! Ra6 13.Ba6 Nb4) 12...a5 13.b5+–) 12.d4 Nf6 13.Bd3 0–0 (13...h5 14.e4+–) 14.Nf3 (14.e4 Nbd7+–) 14...e6 (14...Bh6 15.h4+–) 15.e4 Nfd7 (15...Rd8 16.c3+–) 16.c3 (16.Bf4 f5 17.Bd6 Rd8+–) 16...Re8 (16...f5 17.Bg5+–) 17.Bf4 f5 (17...f6 18.Ke2+–) 18.Kd2 (18.Bd6 Rd8+–) 18...h6 (18...Nf6 19.e5 Ne4 20.Be4 fe4 21.Ng5+–) 19.Re1 Kf7 (19...g5 20.Bd6 g4 21.Nh4+–) 20.ef5 ef5 (20...gf5 21.Bc4 Kf6+–) 21.Bc4 (21...Kf6 22.Re8+–) 1–0. pierre – rasputin, ChessHere.com, 2004.

5.Na3 Nc6 6.c3 a5 (6...Ba6 7.Qe2+=) 7.Nb5+/– Ba6 (7...d5!?+/–) 8.ba5 Na5 9.c4 Rc8 (9...Nc6!?+/–) 10.Qa4+– Bb5 11.cb5 (11.Qb5 Qb5 12.cb5 Nb3=) 11...Nb7 12.Qa6 Qa6 (better is 12...Qc7+–) 13.ba6 (13.Ra6? Rc1 14.Ke2 e6–+) 13...Nc5 (13...Nd8+–) 14.a7 Ra8 (14...e6 15.a8Q Ra8 16.Ra8 Ke7+–) 15.Rb1 (15...Kd8 16.Rb8 Kc7 17.Ra8+–) 1–0. Trkn – guest4515, ICC, 2004.

5.Na3+= e6 6.Nb5 (6.c3 Ba6+/–) 6...Bb4 (6...Ba6!? 7.c4 Bb5 8.cb5 Nf6+/–) 7.Bb2 f6 8.Bd4 Bc5?? (better is 8...Qc6+–) 9.Qh5 g6 10.Qc5 Qc5 11.Bc5 Kd8 12.Bb6! ab6 (12...Ke7 13.Nc7 Nc6 14.Na8 ab6 15.Nb6 Bb7+–) 13.Ra8 Nc6 14.Nd6 Nge7 (14...Kc7 15.Nf7+–) 15.Nf7 (15...Kc7 16.Nh8+–) 1–0. marekt (2515) – Henrik, ChessWorld.net, 2003.

5.Nc3 a6 6.Ra5 Nc6 7.Ra1 Nb4 8.Nb5 a5 (8...e5 9.Nf3=) 9.c3+= Ba6 (9...Nc6!?+=) 10.cb4 Bb5 11.ba5 Ra5 12.Ra5 (12.Rb1!? e6 13.Nf3+–) 12...Qa5= 13.Bb5 Qb5 14.Nf3 Nf6 (14...e6 15.Qe2 Qe2 16.Ke2+=) 15.Nd4 (15.Qc2 Qc6 16.Qc6 dc6+–) 15...Qd3 (15...Qb1 16.0–0=) 16.Qa4+= e6?? (16...e5 17.Qa8 Ke7 18.Ba3 d6 19.Nc6 Ke6 20.Qc8 Nd7+–) 17.Qa8+– Ke7 18.Ba3 d6 (18...Qa3 19.Qa3 Ke8 20.Qa8 Ke7+–) 19.Nc6 Kd7 20.Qb7 Ke8 21.Qc8 1–0. AleksandrNekhoroshik (1705) – krakatoan (1765), lichess.org, 2020.

5.Nc3 a6 6.Be2 Bb7= 7.Nf3 e6 8.Bb2 (better 8.Ba3=) 8...Bb4?? (better 8...Nc6=) 9.Na4!+– ba4 10.Bg7 Nc6 (10...a3 11.Bh8 Bd5 12.Bd3+–) 11.Bh8 Nge7 (11...a3 12.Qb1 Qc7 13.c3+–) 12.0–0 (12.c3 Ng6 13.Bg7 Bd6+–) 12...Qa5? (12...Ng6 13.Bb2 Be7+–) 13.c3 Bd6 14.Ra4 Qc7 (14...Qf5 15.Qb1 0–0–0 16.Bd3+–) 15.Rh4 0–0–0 (15...Ng6 16.Rh7 Nh8 17.Rh8 Ke7 18.Ra8 Ba8 19.Qa4+–) 16.Rh7 Ng6 (16...Rg8 17.g3+–) 17.Bf6 Rg8 18.g3 Nce5 19.Ne5 Ne5 (19...Be5 20.Rf7 Bf6 21.Rf6+–) 20.Be5 Be5 21.Qa4 (21.Rf7 Bd6+–) 21...a5 22.Rf7 Bg3 (22...Qc6 23.Qc6 Bc6+– (23...dc6?? 24.Rb1 Bc7 25.d4+–)) 23.fg3 (23.hg3?? Rg3 24.Kh2 Rg2 25.Kh3 Qh2) 23...Rg3 24.Kf2 Rg2 (24...Rg8 25.Ke1 Rd8 26.Bb5+–) 25.Ke1 Bc6 (25...Qd6 26.Qa5 Re2 27.Ke2 Ba6 28.Kd1 Bf1 29.Rf8 Qf8 30.Qa8 Kc7 31.Qf8 Bh3+–) 26.Ba6 Kb8 27.Qd4 Rg8 28.Rf8 Qd8 29.Qb6 Ka8 30.Qd8 (30.Qd8 Ka7 31.Bd3 Rf8 32.Rf8 Bb7 33.Qa5 Ba6 34.Qa6) 1–0. GuestLCSK – GuestTMJR, freechess.org, 2018.

5.Nc3 Ba6 6.Qf3 Bb7 7.Qf4 Bc6 (7...a6 8.Nf3=) 8.Nf3+= a6 (8...Na6 9.Be2+=) 9.Ne5 (9.Be2 Nf6+–) 9...Nf6+= 10.Nc6 (10.Nc6 dc6 11.Be2+=) 1–0. pereira – vasyl_puzanov, internet, 2021.

5.Nc3 Qf6? 6.Bb5+– e5 (6...Nc6 7.Ra4+–) 7.Nd5 (7.Nf3 Bb7 8.Ba3 Na6+–) 7...Qd6 8.Qf3 Nf6?? (better 8...Bb7 9.Nf6! Nf6 10.Qb7 Qd5 11.Qd5 Nd5+–) 9.Nf6 gf6 10.Qa8 Nc6 (10...a6 11.Bd3 Qc7+–) 11.Qc8 (11.Qc8 Ke7 12.Ba3+–) 1–0. GuestGBQJ – GuestSLTZ, freechess.org, 2020.

5.Nf3 Bb7 6.Nc3+=.

5.Nf3 e6 6.Bb2 Nc6 7.Nc3 (7.Na3 a6+=) 7...Nb4 (7...Ba6 8.Na2+=) 8.Nb5 Ba6 9.Bd4 Bc5?? (better 9...Qc6 10.Nc3 Bf1 11.Rf1 a5=) 10.Ra6!+– (10.Bg7?! Bb5 11.Bh8 d5+–) 10...Na6 (10...Na6 11.Bg7 Combination; 10...Qa6 11.Nc7 Double attack (11.Bc5 Deflection; 11.Nc7 Decoy; 11.Bc5 Overloading)) 11.Bg7 0–0–0 (11...Nb4 12.Bh8 a6 13.Nbd4+–) 12.Bh8 f6 13.c4 (13.d4 Be7 14.Qd3 Nb8+–) 13...Nb4 (13...Rf8 14.Qc2+–) 14.Be2 (14.d4 Be7 15.Qa4 Qa6 16.Qa6 Na6+–) 14...e5 (14...Be7 15.Qb1+–) 15.d4 ed4 16.ed4 Bf8 17.0–0 Bh6 (17...Re8 18.c5 Qa5 19.Bc4+–) 18.c5 (better 18.Qb1 a5 19.c5+–) 18...Qc6 (18...Qa5+–) 19.Na7 Kb7 20.Nc6 Nc6 21.Qb3 Kc7 (21...Nb4 22.Qb4 Kc6 23.Ne5 Kd5 24.Qc4 Ke4 25.Bd3 Kf4 26.Qc1) 22.Qb6 Kc8 23.Ba6 1–0. GuestCQWF – archjos, freechess.org, 2019.

5.Nf3 Nf6 6.Na3 e6 (6...Na6 7.Bb2+=) 7.c3+/– d5 (7...Ba6 8.Be2+/–) 8.Bb5 Bd7 9.Qa4 Bd6 (9...Be7 10.0–0+/–) 10.c4 Bb5 (better is 10...Be7 11.c5 Qc7+–) 11.Nb5+– (11.Qb5?! Nc6 12.c5 Qb5 13.Nb5 Bb8+/–; 11.cb5?! 0–0+=) 11...0–0 (11...Kd8 12.c5 (12.Nd6?! Qd6 13.d3 dc4+–) 12...Bc5 13.Ne5+– (worse is 13.bc5 Qc6+–)) 12.c5 (12.Nd6?! Qd6 13.c5 Qe7+/–) 12...Bc5 13.bc5 Qc5 (13...Qd8 14.Na7 Qc7 15.Bb2 Qc5 16.Bf6 gf6 17.0–0+–) 14.Ba3 (14.Ba3 Qb6 15.Bf8 Kf8 16.0–0+– (16.Na7?! Nc6+–); 14.Na7?! Rc8 15.0–0 Rc7+–) 1–0. pcmvr (2775) – bromer (2260), net–chess.com, 2008.

4.e3 Bb7

5.Bb2 a6 6.Nf3 Nc6 7.c4 (7.c3 e5=) 7...Nb4 (7...bc4 8.Bc4 d5 9.Bb3=) 8.Qb3 (8.Bc3 e6 9.cb5 Bf3 10.gf3 ab5 11.Ra8 Qa8 12.Bb5 Qd5+=) 8...e6=+ 9.cb5 Bd5 10.Qd1 ab5 (10...Be4 11.Nd4=) 11.Ra8 Qa8 12.Bb5 (12.Nc3 Nf6=) 12...Qb7 (12...Bc6 13.Be2=) 13.Nc3 Bf3 (13...Bc6 14.Bc6 Nc6 15.Qa1+=) 14.Qf3+= Qf3 15.gf3 f6 (15...f5 16.Ke2+=) 16.Ke2 Ne7 17.Ra1 Nec6 18.Ra8 Kf7 19.Ba3 (19.Rc8+=) 19...g5 (better 19...Rg8!?+=) 20.Bb4+– Nb4 21.Bd7 Bg7 22.Rh8 (22.Ra7 Bf8+–) 22...Bh8 23.d4 (23.Ne4 e5+–) 23...Ke7 24.Bb5 (24.Bc8 h6+–) 24...f5 25.Kd2 Kd6 26.Ne2 (26.Bc4 h6+–) 26...e5 Black prepares f4 27.Kc3 (27.de5 Be5 28.f4 gf4 29.ef4 Bb2+–) 27...Nc6 (27...Nd5!? 28.Kc4 f4+=) 28.Bc6+– Kc6 29.Kc4 f4 30.d5 Kd6 (30...Kd7 31.Nc3+–) 31.Nc3+– fe3 (better 31...h6+–) 32.fe3 Bf6 (32...h6+–) 33.Ne4 Ke7 34.Nf6 Kf6 35.Kc5 Ke7 36.Kc6 (36.Kc6 h5 37.Kc7+–) 1–0. Kuhlmann – Burbach, 1983.

5.Bb5? Bg2 6.Nf3 Bh1 –+.

5.Nf3 Na6 6.Bb5 Nb4 7.0–0 e6 8.c3 Nd3?? (better 8...Qf6+=) 9.Bd3+– Bd6 (9...Nf6 10.Bb2+–) 10.Ba6 Bc6 (10...Rb8 11.Bb7 Rb7 12.e4+–) 11.Nd4 (11.d3 Ne7+–) 11...Nf6 (11...Qc7 12.f4+–) 12.Nc6 dc6 13.Bb7 Rb8 (13...Bh2 14.Kh1 Bc7 15.Bc6 Nd7 16.Qg4+–) 14.Bc6 (14.Ra7?! Qb6 15.Bc6 Qc6+–) 14...Nd7 (14...Kf8 15.Ba3+–) 15.Ra7 0–0 (15...Bc7 16.Ba3 Rb6 17.Qa4+–) 16.Rd7 Qc8 (16...Bh2 17.Kh2 Qc8 18.Qa4 Rb1 19.Be4+–) 17.Rd6 Rb1 18.c4 Rd8 (18...Qa6 19.c5 Qc4 20.d4+–) 19.Rd8 Qd8 20.d4 g6 (20...Qc7 21.Be4 Ra1 22.c5+–) 21.d5 e5 (21...ed5 22.cd5 Qb8 23.e4+–) 22.c5 White prepares the advance d6 22...f5 (22...Qe7 23.d6 Qf6 24.Qf3+–) 23.d6 Rb5 24.Qd5 Kg7 25.Qe5 Kf8 26.Qh8 (26.Qh8 Kf7 27.Bd5) 1–0. DEFFM – SuperiliminalN, freechess.org, 2018.

5.Nf3 Na6 6.c3 Nc7 7.Na3 (7.Be2 e5+=) 7...a6 8.c4 (8.Be2 Nf6+=) 8...bc4= 9.Nc4 (9.Bc4 e6 10.Bb2 A) 10...Bb4?? 11.Bg7 Nb5 12.Nb5 (12.Bh8?! Na3 13.Bd3 h6+–) 12...ab5 13.Ra8 (13.Bh8?! bc4 14.Rb1 Qa5+–) 13...Ba8 14.Be2+–; B) 10...Nf6=) 9...Nd5 10.Qb3 e6 11.Na5 (11.Bb2 Ngf6= (11...Bb4?? 12.Bg7 Ngf6 13.Bh8+–; 11...Nb4 12.Bg7 Bg7 13.Nd6 Kf8 14.Nb7+–)) 11...Qb6 The pressure on the isolated pawn grows (11...Bc8 12.Bb2=+) 12.Nb7= Nb4?? (better 12...Qb7 13.b5 Rb8=) 13.Na5+– Rc8 (13...Qc7 14.Nc4+–) 14.Nc4 Qb8 (14...Qc6 15.Nfe5 Qe4 16.Qa4+–) 15.Ba3 g6 (15...Nf6 16.Rb1 Qc7 17.Qa4+–) 16.Bb4 (16.Rb1 a5 17.Na5 Nc6+–) 16...Bb4 (16...Qb4 17.Qa2+–) 17.Ra6 (better 17.Qb2 f6 18.Ra6+–) 17...Bd2 (17...Be7 18.Nb6 Qb7+–) 18.Nfd2 Qc7 (18...Qb3 19.Nd6 Kf8 20.Nb3+– (20.Nc8?! Qc3 21.Nd6 Kg7+–)) 19.Qb7 (19.Qa3 Nf6 20.Nd6 Kf8 21.Nc8 Kg7+–) 19...Qc5 (19...Qb7 20.Nd6 Ke7 21.Nb7 Nf6+–) 20.Qc8! Qc8 A deflection 21.Nd6 Theme: Double Attack 21...Kf8 (21...Kd8 22.Nc8 Kc8 23.Ra7+–) 22.Nc8 Kg7 23.Ra8 (23.Nd6 Nf6+–) 23...h5 24.Nd6 g5 25.Ne8 (25.Nf3 g4 26.Ne8 Kf8+–) 25...Kg6 26.Bd3 f5 27.Nf3 d6 28.Nd6 (28.Nd6 Kf6 29.Ne8 Ke7 30.Bb5+–) 1–0. Marus – POWERKING, internet, 2001.

5.Nf3 Qb6 6.Bb2 Nc6 7.c3 d5 8.Na3 (8.d4 Nf6=) 8...Ba6 (8...a6!?=) 9.d4 Nf6 10.Bd3 e6 11.Qe2 Rb8 12.Ne5 Ne5 13.de5 Nd7 14.f4 Qc6 (14...g6!?+/–) 15.Nc2 Qb7 (15...Qb6 16.0–0+–) 16.0–0 h5 (16...f5 17.Nd4 Kf7 18.g4 fg4 19.Qg4+–) 17.Nd4 Nb6?? (17...h4+–) 18.Ra6! (18.Bb5?! Bb5 19.Qb5 Nd7+–; 18.Nb5?! Bb5 19.Bb5 Nd7+–) 18...Nc4 (18...Qa6 19.Bb5) 19.Rfa1 Nb2 (19...Ra8+–) 20.Bb5 (20...Qb5 21.Nb5+–) 1–0. Trkn – guest6741, ICC, 2004.

5.Nf3 Bc6 6.Nc3 Qb6 (6...a6 7.Be2+/–) 7.Bd3 (7.Nd4 e5 8.Ndb5 Nf6+/–) 7...e6 8.Nd4 (8.Ba3 Nf6+/–) 8...Bb4 (8...a6!?+/–) 9.Ncb5+– (worse is 9.Ndb5 Nf6+/–; 9.Nc6?! Bc3 10.dc3 Nc6=) 9...Ne7 (9...Bb5 10.Nb5 Nf6 11.Bb2+–) 10.Rb1 Bc5 (10...Na6 11.Qe2 Bg2 12.Rg1+–) 11.Qh5 Bd4?? (11...Nd5+–) 12.Nd6 (12.Nd6 Kd8 13.Rb6 ab6 14.ed4+–; 12.ed4?! Bb5 13.Rb5 Qd6+/–) 1–0. pierre – extedik, internet, 2009.

5.Nf3 e6 6.Bb2 a6 7.c4 Nc6 8.cb5 Nb4 (8...ab5 9.Ra8 Qa8 10.Bb5 Nb4 11.Nc3=) 9.ba6+= Na6 10.Be2 (10.Bc4 Nb4+=) 10...Nc5 (10...Nf6 11.0–0=) 11.0–0 (11.Ra8 Ba8 12.0–0 Nf6+=) 11...Ra1 12.Ba1 Nf6 13.Nc3 (13.Bd4 Bd6+=) 13...Bc6 (13...Be7 14.Qb1=) 14.d4 (14.Ne5 Bd6 15.d4 Nb7+=) 14...Nce4 15.Ne4 (15.Ne5 Nc3 16.Bc3 Bb7+=) 15...Be4 16.Bd3 (16.Ne5 Be7+=) 16...Bd3= 17.Qd3 Nd5 (17...d5 18.Rc1 Bd6 19.Qb5 Nd7 20.Rc6=) 18.Rb1 (18.e4 Nf4 19.Qd2 Qb8+–) 18...f5+= 19.Nd2 (19.Ne5 Bb4+=) 19...Bd6 (19...Bb4 20.Bb2=) 20.g3 (20.Nc4 Bc7+=) 20...0–0 21.Nc4 Bc7 (21...Qc7 22.Bb2 Rb8 23.Ra1=) 22.Bc3 (22.Bb2 Qg5=) 22...d6 (22...Qg5 23.Ba5=) 23.Rd1 (23.Bd2 Nf6=) 23...Nc3 (23...Qg5 24.Ra1=) 24.Qc3 Qf6 (24...d5 25.Nd2=) 25.Nd2 Bb8 26.Qc6 d5 27.Nb3 Qe7 28.Nc5 Bd6 29.Nb7 (29.Ra1 Rb8+=) 29...Bb8 (29...Ba3 30.Ra1=) 30.Ra1 (30.Rb1 Qe8 31.Rb6 Qc6 32.Rc6 Kf7+=) 30...Kf7 (30...Qe8 31.Ra6 Qc6 32.Rc6+=) 31.Ra6 Re8 32.Nc5 Qc7 33.Qc7 (33.Qb5 Ba7 34.Nd7 Ra8+–) 33...Bc7+= 34.Ra7 (34.f4 h6+=) 34...Re7= 35.Kf1 (35.Ra8 Bd6=) 35...e5 (35...Bd6 36.Ra6 Bc5 37.dc5=) 36.Nb3 (36.f4 ed4 37.ed4 Bb6=) 36...e4 (36...f4 37.ef4 ef4 38.Ra8=) 37.Ke2 (37.Nc5 Bd6 38.Ra6 Bc5 39.dc5 Rc7=) 37...Bb6 38.Re7 (38.Ra2 Ra7 39.Ra7 Ba7=) 38...Ke7 39.Kd2 (39.h3 h5=) 39...Kd6 (39...g5 40.Kc3=+) 40.Kc3 (40.h3 g5=+) 40...g5 41.Kb4 (41.h3 Bc7=+) 41...Kc6 42.h4 (42.Ka4 f4=+) 42...f4 (better 42...gh4!? 43.gh4 Bd8–+) 43.hg5=+ fg3 44.fg3 Bd8 45.Nd2 (45.Kc3 Bg5 46.Kd2 h5=+) 45...Bg5–/+ 46.Nf1 h5 47.Ka4 (47.Kc3 Be7–/+) 47...h4 (47...Be7 48.Ka5=+) 48.gh4=+ Bh4 49.Kb4 (49.Nh2 Bg3 50.Ng4 Be1=+) 49...Bg5 (49...Be1 50.Ka4=+) 50.Ka4 Kb6 51.Kb4 Be7 52.Ka4 Bg5 53.Kb4 Be7 (53...Bh4 54.Nh2=+) 54.Ka4 Bg5 (54...Bd6 55.Kb3=+) 55.Kb4 Bh6 (55...Bh4 56.Nh2=+) 56.Ka4 (56.Kc3 Kc6=+) 56...Bg5 (56...Kc6 57.Kb3=+) 57.Kb4= ½–½. jaddwarrior (1990) – xamffz (1895), ChessWorld.net, 2015.

5.Nf3 e6 6.c3+=.

5.Nf3 a6

6.Bb2 Nc6 7.c4 (7.c3!?=) 7...bc4=+ 8.Bc4 d5 9.b5 (9.Be2 Nb4 10.Qa4 Nc6=+) 9...dc4=+ 10.bc6 Bc6 11.Ne5 Bb5 (11...Qb8!? 12.Nc6 Qb2=+) 12.Nc3= Nf6 13.Qf3 (13.Nc4 e6=) 13...Rc8=+ 14.g4 (14.Nb5 ab5 15.Qb7 c3 16.dc3 Nd7+–) 14...g5 (14...Qd6!? 15.Nb5 ab5–/+) 15.h4=+ h5 (15...Rg8 16.e4=+) 16.hg5 (16.Nb5 ab5 17.Qb7 Rh7 18.hg5 Nd7 19.gh5 Bg7 20.Qb5 Be5 21.Be5 Rc5+–) 16...hg4= 17.Qg2 Rh1 18.Qh1 Nd7 19.Nf7! (19.Ng4?! Rc5=) 19...Kf7 20.Qh5 Kg8 21.Qg6 (21.Nb5?! c3 22.Bc3 Rc6+–) 21...Bg7 22.Nb5 e5 (22...Qf8 23.Bg7 (23.Ra6?! Nc5 24.Bg7 Qg7+/–) 23...Qg7 24.Qe6 Kf8 25.Qf5 Ke8 26.Ra6+–) 23.Nd6 (better is 23.Qe6 Kh8 24.Nd6+– (24.Qa6 Nc5 25.Nd6 Na6 26.Nf7 Kg8 27.Nd8 Nc5–+; 24.Ra6 Nc5 25.Qg4 Nd3 26.Ke2 Nb2 27.Qh3 Kg8 28.Qe6 Kh7 29.g6 Kh8+/–)) 23...Qf8? (23...Nf8 24.Qf7 Kh8 25.Nc8 Qc8+–) 24.Qe6 Kh7 25.0–0–0 Qf3 26.Qd7 (26...Rb8 27.Rg1 (< 27.Nc4 Rb7 28.Qc8 Kg6+–) 27...Qf2 28.Rh1 Kg8 29.Qe6 Kf8 30.Ba3 Rb1 31.Kb1 Qe1 32.Re1 c3 33.Qf7 1–0. Kuhn,A – Meyer,D, corr, 1976.

6.Bb2 e6 7.c4 Bb4 8.Bg7 Be7 9.Bh8 Bf6 10.Bf6 Qf6 11.Nc3 b4 12.Na4 a5 13.Be2 Ne7 14.d4 Nbc6 15.Nb6 Rb8 16.0–0 Ng6 17.Qa4 Qf5 18.d5 ed5 19.cd5 Nce7 20.Bb5 Rd8 21.Qa5 Nd5 22.Nd5 Bd5 23.Bc4 Ne7 24.Bd5 Nd5 25.Rfd1 Ne7 26.Qf5 Nf5 27.Nd4 Ne7 28.Nb5 Nc6 29.Ra8! b3 30.Rd8 Kd8 31.Rb1 Na5 32.Nd4 Ke7 33.Nb3 Nb3 34.Rb3 h6 35.Rb5 1–0. Trkn – Thomas Lazar, itsyourturn.com, 2000.

6.c3 Nf6 7.d4 Bf3 (7...e6!?=) 8.Qf3+= d5? (better is 8...Nc6+=) 9.Bb5!+– Nbd7 (9...ab5 10.Ra8 Pinning (10.Ra8 Deflection)) 10.Bc6 Ra7 11.Bd5 e6 (11...Nd5 12.Qd5 e6 13.Qc4+–) 12.Bb3 Bd6 13.e4 e5 14.d5 0–0 15.Nd2 Qb8 16.Nc4 Be7 17.Na5 Qe8 18.0–0 Ra8 19.Bd2 Bd6 20.c4 Rb8 21.Nc6 Ra8 22.Rfc1 Bc7 23.c5 h6 24.Bc4 Nb8 25.b5 a5 26.Na5 Ba5 27.Ba5 Qc8 28.c6 Ne8 29.Bb4 Ra1 30.Ra1 Nf6 31.Bf8 Qf8 32.b6 Qc5 33.c7 (33.c7 Nbd7 34.Ra8 Kh7 35.c8Q Qc8 36.Rc8 g6 37.Rd8 h5 38.Rd7 Nd7 39.Qf7 Kh6 40.Qd7 Kg5 41.Qe7 Kh6 42.Qf8 Kh7 43.d6 h4 44.Bg8 Kh8 45.Qf7 h3 46.Qh7) 1–0. marekt – Verner201098, ChessWorld.net, 2012.

6.c4 Qb6 7.c5+= Qd8 8.Nc3 Nf6 9.Qb3 Nc6 (9...Bf3 10.gf3 Nc6 11.d4+=) 10.d4+– d5 11.Bd3 h6 12.Ne5 e6 13.Nc6 Bc6 14.0–0 Qc7 15.f3 Be7 16.Bd2 0–0 17.Be1 Qb7 18.Qb2 Bd8 19.Bg3 Bc7 20.Bc7 Qc7 21.Ne2 Ra7 22.Ra3 Rfa8 23.Rfa1 a5 24.Nc3 ab4 25.Ra7 Ra7 26.Ra7 Qa7 27.Qb4 (27.Nb5?! Bb5 28.Bb5 Qa3=) 27...Qa1 28.Kf2 Qh1 29.h3 (worse 29.Nb5 Bb5 30.Bb5 Qh2+=) 29...Qc1 30.Ne2 Qd1 (30...Qa1 31.Bb5 Bb5 32.Qb5+–) 31.Bb5+– Bb5 32.Qb5 Qc2 33.Qb8 Kh7 34.Qb7 Kg6 35.c6 (35.Ke1!? Kh7 36.Qf7 Qb1 37.Kf2 Qg6+–) 35...Ne8 36.Qd7 Nf6 37.Qc8 Kh7 38.h4 Nh5 (38...Qc4+–) 39.Qb7 Kg6 (39...Ng3 40.Kg3 Qe2 41.Qb1 g6 42.c7 Qe3 43.Qa1+–) 40.c7 Nf6 (40...Ng3 41.Kg3 Qe2 42.Qb1 f5 43.c8Q Qe3 44.Qe8 Kh7 45.Kh3+–) 41.c8Q Qd2 42.Qf8 e5 (42...h5 43.Qff7 Kf5 44.Qb1 Qd3 45.Qd3) 43.Qbf7 Kf5 (43...Kh7 44.Q8g7) 44.Qc8 1–0. pcmvr (2765) – grahamtrue (2225), net–chess.com, 2014.

6.c4 bc4 7.Bc4 d5 8.Be2 e6 9.Qb3 Nc6 10.b5 ab5 11.Ra8 Qa8 12.Bb5 Nge7 13.Ne5 f6 14.Nd3 Nc8 15.Nf4 Kf7 16.Nc3 Ne5 (16...Nd6!?=) 17.d4 Nc6 18.Ncd5 Nd4 (18...ed5 19.Qd5) 19.Be8?? (19.ed4 Bd5) 19...Kg8?? (19...Ke8 20.Nc7 Kd7=+) 20.ed4 (better is 20.Nf6 gf6 21.ed4 Qa5 22.Ke2+–) 20…Bd5 (21.Nd5 Qd5 22.Qd5 Bb4 23.Bd2 Bd2 (23...ed5?? 24.Bb4 Nb6 25.Bc5+–) 24.Kd2 ed5) 0–1. hooks – markmooney, ChessWorld.net, 2005.

6.c4 bc4 7.Bc4 e6 8.b5=.

6.c4 Nc6!? 7.Nc3 Nb4=.

6.c4 e6 7.cb5 ab5 8.Ra8 Ba8 9.Bb2 Nf6 10.Bb5 Bb4 11.0–0 0–0 12.Qa4 Bf3 13.Qb4 Bc6 (13...Nd5!? 14.Qd6 Qg5+=) 14.Bd3+– d5 15.Rc1 Ba8 16.Qh4 (16.Bf6 gf6 17.Qh4 f5 18.Qg3 Kh8 19.Qe5 Kg8+–) 16...Nbd7 17.Ba3 Re8 18.Nc3 (18.Bb5 e5+–) 18...Qa5 (18...Ne5!? 19.Bc2 Nc4+=) 19.Bb4 Qc7 20.Ne2 (20.Bb5 h6+–) 20...Qb7+= 21.f3 (21.Bd6 Ne4 22.Rb1 Qa7=) 21...e5 (better 21...Ne5!? 22.Bc2 d4–/+) 22.Rb1 Qc6 (22...e4 23.Bc2+=) 23.Bf5 (23.Ra1 Rb8+–) 23...Rb8+= 24.Bc3 Rb1 25.Bb1 Qb5 26.Qe1 Bb7 27.g4 (better 27.Bf5!?+=) 27...d4=+ 28.ed4 Bf3 29.de5 Ng4 (29...Ng4 30.Nd4 Qc5+=; worse 29...Be2 30.ef6 Nf6 31.Bf6 gf6 32.Bf5=; worse 29...Ne5 30.g5 Be2 31.Be5 Qe5 32.gf6=+). Gross,Willi – Merten,Rainer, VM_cup_2019, 2019.

4.e3 Nc6

5.Bb5 Nb4 6.Nf3 a6 7.Be2 e6 8.0–0 d5 9.d4 Nf6 10.Ba3 Nc6 (10...Be7 11.c3 Nc6 12.c4+=) 11.Bf8+/– Kf8 12.Nbd2 h6 (12...Kg8 13.c4+/–) 13.c4 Nb4 14.Ne5 Bb7 (14...dc4 15.Ndc4 Kg8 16.Bh5+/–) 15.Bh5 (15.Qa4 a5+–) 15...g6 (15...Nh5!? 16.Qh5 Qe7+/–) 16.Qb1+– Ne4?? (16...gh5 17.Qb4 Qe7 18.Nd7 Nd7 19.Qb7 Kg7+–) 17.Qb4 Qe7 (17...Nd6 18.c5 a5+–) 18.Nd7 Ke8 19.Qb7 Rd8 20.Ne4 de4 21.Bd1 Rd7 22.Ba4 f5 23.Rfb1 Kf7 24.Bd7 Rd8 25.Be6! Ke6 26.Ra6 Kf7 27.Qc6 1–0. orane (2020) – mass, Live Game Caissa's Web, 2004.

5.Bb5 Nb4 6.Qg4?? Nc2 0–1. Trkn – Thomas Lazar, itsyourturn.com, 2000.

5.Bb5 Bb7 6.Bc6 Bc6 7.Nf3 Nf6 8.c4 g6 9.0–0 Bg7 10.Bb2 0–0 11.b5 Be4 12.d3 Bf3 13.Qf3 (13.gf3?! d5+/–) 13...a5 14.ba6 Qb6 15.Bd4 Qb3 (15...Qd6 16.c5 Qe6 17.a7+–) 16.Qd1 (16.Nc3!? Qb8+–) 16...Qb4 17.Qa4 Qd6 18.Nc3 Ng4 19.g3 Bd4 20.Nb5 Qf6 21.Nd4 e5 22.Qd7 ed4 23.Qg4 h5 (23...Rfd8+–) 24.Qd4 Qf3 (24...Qc6 25.a7 Rfd8 26.Qc3+–) 25.a7 Rfd8 26.Qe4 (better is 26.Qe5 h4 27.Rfb1 Kh7+–) 26...Qe2 (26...Qe4 27.de4 Rd7+–) 27.Rfb1 Re8 (27...Kh7+–) 28.Qe8! Re8 29.Rb8 Qd3 30.Re8 Kg7 31.a8Q Qc3 32.Qa7 (32.Rh8 Qe5 33.Ra6 Qa1 34.Ra1 Kf6 35.Ra6 Kg5 36.Qf3 h4 37.gh4) 32...Qc4 33.Qd4 (33.Qd4 Qd4 34.ed4 h4 35.d5 hg3 36.hg3 Kh7 37.d6 Kh6 38.d7 Kh7 39.d8Q Kg7 40.Qd4 Kh6 41.Rh8 Kg5 42.Qf4) 1–0. Hal1958 – Ronan48, playchess.de, 2002.

5.Bb5 e5 6.Bc6 (6.c3 e4+–) 6...dc6+= 7.Nf3 (better 7.Ra4!?+=) 7...e4=+ 8.Nd4 Qb6 (better 8...Qg5!? 9.Rg1 Bb4=+) 9.Qh5 Nf6 10.Qe5 Be6? (better 10...Kd7+–) 11.Ne6+– fe6 12.Qe6 Be7 (12...Kd8 13.Bb2 Nd5 14.0–0+–) 13.Nc3 Qb4 14.Ba3 Qb7 15.Ne4 Ne4 16.Qe4 c5 (16...Kf7 17.Qc4 Ke8+–) 17.Qb7 Rd8 18.Bc5! Bc5 (18...Bc5 19.Qc6 Double attack (19.Qc6 Decoy)) 19.Qe4 Be7 20.Ra7 0–0 21.Qe7 Rde8 (21...Rd7 22.Qd7 Rf7 23.Qf7 Kh8 24.Qg7) 22.Qg7 1–0. DEFFM – domkrat, freechess.org, 2018.

5.c3 Bb7 6.Bb5 (6.Nf3+=) 6...Qc7 (better is 6...Nb4!? 7.Nf3 Bf3 8.gf3 Rb8=) 7.Nf3+/– e6 (7...a5 8.ba5 Ra5 9.Ra5 Qa5 10.Qb3+/–) 8.d4 (8.Bb2 Ne5+/–) 8...Nf6 (8...a5 9.ba5 Ra5 10.Ra5 Na5 11.Qd3+/–) 9.Bd3 Be7 (9...a5 10.b5 Nb8 11.c4+–) 10.b5 (10.e4 Nd8 11.Qc2 h6+–) 10...Nb8+/– 11.c4 d5 (11...a6!?+/–) 12.c5+– 0–0 (12...a6 13.b6 Qc8 14.0–0+–) 13.Bd2 Ne4 (13...a6 14.Ba5 Qc8 15.c6 ab5 16.cb7 Qb7 17.Bc3 Ra1 18.Ba1+–) 14.Ba5 Qd7 15.Nbd2 (15.0–0 Rc8+–) 15...Nd2 (15...Rc8 16.0–0+–) 16.Qd2 Qc8 (16...a6 17.c6 Nc6 18.bc6 Qc6 19.Ne5+–) 17.0–0 a6 18.c6 ab5 (18...Bc6 19.bc6 Nc6 20.Rfc1+–) 19.cb7 Qb7 20.Bb4 (20.Rab1 Nc6 21.Rb5 Qd7+–) 20...Ra1 (20...Bb4 21.Qb4 Nd7 22.Qb5 Qb5 23.Bb5+–) 21.Ra1 Nc6 22.Be7 Ne7 23.Ra5 b4 24.Rb5 Qc6 25.Qb4 g6 26.Qe7 Qc1 27.Bf1 Qc8 28.Ne5 Qe8 29.Qd6 Qc8 30.Nd7 Rd8 31.Nf6 Kg7 32.Qe5 Kh6 33.Ng4 1–0. Andersson,Egart – Borchardt, Tiger–SC, 1999.

5.Qf3 a6 6.Bb5 ab5?? 7.Ra8+– Qb6?? (7...Nb4 8.Na3 e6+–) 8.Rc8 Nd8 9.Qa8 Qb7 (9...e6 10.Bb2 Ne7+–) 10.Rd8 1–0. GuestLFWV – GuestNMYQ, freechess.org, 2018.

3.ab5 Qb6

4.Nc3 e6 5.e4 Bb4 6.Bb2 f6 7.Qg4 g6 8.e5 f5?? (Better is 8...Be7 9.Qf3 fe5+/–) 9.Qb4+– c5 (9...Ne7 10.Ba3 Qd8 11.Qh4+–) 10.Na4 Qc7 (10...cb4?? 11.Nb6 Bb7 12.Na8 Ba8 13.Ra7+–) 11.Qc5 Qc5 12.Nc5 Ne7 13.b6! a6 14.b7 Ra7 15.bc8N Nc8 16.Na6 Nc6 17.d4 Nb6 18.c4 Rb7 19.Nc5 Rc7 20.Ra6 Nc4 21.Bc4 d5 22.ed6 Kf7 23.Be6 Ke8 24.Ra8 Nd8 25.dc7 Ke7 26.c8Q Rf8 27.d5 Ne6 28.Qe6 1–0. marre – tazitazi, GameColony.com, 2003.

4.e3 e6 5.Bb2 Nf6 6.Bd4 Qc7 7.b6 Qb7 8.Ra7 Ra7 9.ba7 Na6 10.Ba6 Qa6 11.Nf3 Be7 12.c3 0–0 13.Qe2 Qa2 14.0–0 Ba6 15.Qd1 Bf1 16.Kf1 d6 17.d3 e5 18.Bb6 Rb8?? 19.ab8Q Bf8 20.Nfd2 Nd7 21.Qa7 Qd5 22.Qd7 Qd3 23.Ke1 g5 24.Nf3 Qg6 25.Qc6 h5 26.Ne5 Qe6 27.Bd4 g4 28.Qd7 Qf5 29.Qf5 1–0. Trkn – Superfish, itsyourturn.com, 2000.

3.e3 ba4

4.Ra4 e6 5.Bb2 Nf6 6.Nf3 d6 7.d4 Be7 8.Bd3 0–0 9.0–0 Bb7 10.Nbd2 d5 11.Bc3 a6 12.Ne5 Nbd7 13.f4 Nb6 14.Ra5 Bd6 15.g4 (15.Qa1 Qe7+=) 15...Nbd7 (15...Qe7!?=) 16.g5+/– Ne8 17.Qh5 Threatening mate: Qxh7 17...g6 18.Qh6 Ne5 19.de5 Bc7 20.Rf3 The mate threat is Rh3 20...Ng7?? (better is 20...Qd7 21.Rh3 f5 22.gf6 Ba5+–) 21.Rh3 (21.Rh3 Re8 22.Bd4+–) 1–0. pierred (2600) – mrazo (2250), net–chess.com, 2008.

4.Ra4 e6 5.Bb2 Nf6 6.Nf3 Be7 7.Bd3 0–0 8.Ng5 h6 9.Bf6 Bf6 10.Nh7 Re8 11.Nf6 Qf6 12.f4 d5 13.0–0 Bd7 (13...Nd7 14.Nc3+=) 14.Nc3 White prepares the advance b5 14...c5 15.b5 a6 16.f5 ef5 (16...c4 17.fe6 Qe6 18.Bf5+/–) 17.Qf3 (better is 17.Nd5 Qd6 18.Nc3+/–) 17...Re5? (better is 17...d4!? 18.ed4 cd4+=) 18.Nd5+– Qd8 19.Nf6! Qf6 (19...gf6 20.Qa8 Eliminates the defender a8) 20.Qa8 Re8 21.Bf5 Qd6 22.Bd7 Qd7 23.Raf4 Qd2 24.Rf7 Qe3 25.Kh1 ab5 (25...Qe2 26.Qb7 Kh8+–) 26.Qd5 (26.Qd5 Re6 27.Re7+–) 1–0. Rosner,Dirk – Neumann, Tiger SC, 2000.

4.Bb2.

4.c4 Bb7 5.Nc3 (5.Qa4 e5+=) 5...e6 (5...e5 6.Ra4 c5 7.b5+=) 6.Qa4+= Nf6 7.Qb3 (7.d4 Bd6+=) 7...Be7= 8.Nf3 (8.d4 0–0=) 8...0–0 9.Be2 d5 10.c5 Nbd7 11.d4 Re8 (11...a5 12.ba5 Ra5 13.Ra5 Qa5 14.Qb7 Qc3 15.Bd2 Qa1 16.Bd1=) 12.b5 (12.0–0+=) 12...Rb8 (better 12...Ne4!?+=) 13.Ra7+– cb5 14.Qb5 Qc7 (14...Qc8 15.0–0+–) 15.0–0 (15.Bd2 e5+–) 15...Qc6 (15...Ne4 16.Ne4 de4 17.Nd2+–) 16.Qa5 (16.Qc6 Bc6 17.Bd2 Ne4+–) 16...Ra8 17.Bb5 Ra7 18.Qa7 (worse 18.Bc6 Ra5 19.Bb7 Rb8=) 18...Qc7? (better 18...Qc8+–) 19.c6! Ra8 (19...Bc6 20.Qc7 Pinning (20.Qc7 Deflection)) 20.Qb7 Qb7 21.cb7 Rb8 (21...Ra7+–) 22.Bc6 Nb6 (22...Kf8 23.Bd2+–) 23.Bd2 Nc4 (23...g5 24.Ng5 Nc4 25.Ra1 Rb7 26.Bb7 Nd2 27.Ne6 fe6 28.Bc8+–) 24.Ra1 Nd2 (24...Rf8 25.Ra8 Na5 26.Nd5 Nd5 27.Ba5+–) 25.Ra8 (25.Ra8 Rf8 26.Rf8 Bf8 27.b8Q+–) 1–0. pcmvr – rbeckett, net–chess.com, 2017.

4.c4 Bb7 5.Nf3 Nf6 (5...e5 6.Ne5 Bb4 7.Bb2=) 6.Ra4 a5 7.ba5 Ra5 8.Ra5 Qa5 9.Qb3 Qc7 10.Ba3 (10.Bb2 Na6+=) 10...d6= 11.Nc3 e5 (11...Nbd7 12.Be2+=) 12.Be2 (12.c5 dc5 13.Ne5 Bd6+–) 12...Be7 (12...Nbd7 13.0–0+=) 13.0–0 (13.c5 d5+=) 13...0–0 14.Rb1 Ba8 15.d4 Nbd7 16.de5 Rb8? (better 16...Ne5!? 17.Qc2 Rd8+=) 17.ed6 (17.Qa4 Ne8+–) 17...Bd6+– 18.Bd6 Qd6 19.Qa2 Rb1 20.Qb1 Qa3 21.Qd3 h6 22.h3 Qe7 23.Qf5 c5 24.Nd5 (24.Nd2 Qd6 25.Qd3 Qa6+–) 24...Nd5 (better 24...Bd5!? 25.cd5 Nb6=) 25.cd5+– Nf6 26.Bc4 Bb7 27.Nd2 Qe8 28.e4 Bc8 (better 28...Qa4!? 29.Kh2 Qa1+–) 29.Qf4+– Bb7 30.Qe3 (30.f3 Qa4+–) 30...Qe7 31.Qf4 Qe8 32.f3 Qa8 (32...Qd8 33.Nb3+–) 33.Kh2 (33.Nb3!? Qd8+–) 33...Nd7 34.Qc7 Qb8 35.Qb8 Nb8 36.Nb3 Ba6 37.Na5 Bc4 38.Nc4 Kf8 39.Kg3 Ke7 40.Kf4 Nd7 41.Ke3 f6 (41...Nf6 42.Kd3+–) 42.f4 White intends e5 42...g6 43.g4 (43.e5!? Nb8+–) 43...g5 44.f5 Nb8? (44...Kf7+–) 45.e5 White prepares d6 45...fe5 46.Ke4 (46.Ne5 Na6 47.Kd3 Kd6+–) 46...Nd7 47.d6 (47.Ne5?! Nf6 48.Kd3 Nd5+=) 47...Kd8 (47...Ke8 48.Kd5 (48.Ne5?! Nf6 49.Kd3 Nd7+–) 48...e4 49.Ke4+–) 48.Ne5 (better 48.Kd5!? e4+–) 48...Nf6 49.Kd3 Nd7 50.Nf7 (50.Nf7 Ke8 51.Nh6+–) 1–0. NN – NN, NZL Wanganui Chess Club A Grade, 2003.

4.c4 e5 5.Qa4 Nf6 6.Bb2=.

3.e3 a6

4.ab5 cb5 5.c4 bc4 6.Bc4 Bb7 7.Qb3 (7.Nf3 e6=) 7...e6=+ 8.Nf3 d6 (8...Nc6 9.Ba3=+) 9.0–0 (9.Bb2 d5 10.Be2 Nf6=) 9...Nf6 (9...Bf3 10.gf3 Qg5 11.Kh1=) 10.b5 (10.Be2 Qb6=) 10...ab5 (10...Bf3 11.gf3 d5 12.Be2=) 11.Ra8 Ba8 12.Bb5 Nbd7 13.Ba3 Be7 14.Nc3 0–0 15.d4 Qb8 (15...Bf3 16.gf3 d5 17.Rb1=) 16.Rb1 Bf3 17.gf3 Qd8 18.Ne4 (18.e4 d5=) 18...Ne4 (18...d5!? 19.Nd6 Qb8 20.Bd7 Nd7 21.Qb8 Rb8 22.Rb8 Nb8=+) 19.fe4+= Nf6 20.e5 (better 20.Bc6+=) 20...de5–/+ 21.Be7 Qe7 22.de5 Nd5 (22...Ng4 23.e4 Ne5 24.Qg3–/+) 23.Bd3 (better 23.e4!? Qg5 24.Qg3 Qg3 25.hg3=+) 23...Qg5–/+ 24.Kh1 Qg4 (24...Qe5 25.Qc4–/+) 25.Rg1 (25.Qd1!? Qh3 26.Qg1=) 25...Qf3 26.Rg2 Rc8 Threatening mate: Rc1 27.Qb2?? (27.Qb1 Nc3 28.Qc2 Kh8=+) 27...g6 (better 27...Qd1 28.Rg1 Qd3–+) 28.Be2 (28.Ba6!?=+) 28...Qe4–/+ 29.Kg1 Rc2 30.Qb8?? (30.Bf3 Qd3 31.Qb8 Kg7 32.h3 Ne3 33.fe3 Qe3 34.Kh2 Qf4 35.Kg1 Rc1 36.Kf2–+) 30...Kg7 31.Bh5 (31.Bf1 Rc1 32.Qb2–+) 31…Rc1 (31...Rc1 32.Bd1 Rd1) 0–1. AleksandrNekhoroshik (1715) – ecaplayer (1780), lichess.org, 2021.

4.Nf3 e6 5.Bb2 (better 5.ab5 Bb4 6.c4+–) 5...Be7?? (better 5...Bb7+=) 6.Bg7+– d5 (6...Bf6 7.Bh8 Bh8+–) 7.Bh8 Nf6 (7...Bb7 8.Nd4+–) 8.ab5 cb5 9.Bb5! ab5 (9...Bd7 10.Bd7 Nbd7 11.c3+–) 10.Ra8 Bb7 11.Ra1 Bb4 (11...Nc6 12.Nc3+–) 12.Qe2 Ba6 (12...Be7 13.Qb5 Bc6 14.Qb2+–) 13.Ra6! Na6 14.Qb5 Ke7 15.Bf6 (15.Ne5 Qc8 16.Nc6 Kd6 17.Nb4 Qh8 18.Qa6 Ke7+–) 15...Kf6 16.Qa6 Kg7 17.h4 e5 18.Rh3 e4 19.Rg3 Kh8 20.Ne5 Bf8 (20...Bd2 21.Nd2 Qg5 22.Rg5 d4 23.Nf7) 21.Nf7 1–0. UncleBulgaria (2460) – stuuu (1685), ChessWorld.net, 2017.

3.e3 Na6

4.ab5 Nb4 5.Ba3 Nd5 6.c4 Nb6 7.Qf3 (7.bc6 dc6 8.d4 e5+/–) 7...Bb7 8.c5 (8...Nd5 9.bc6 dc6 10.Bc4+=; 8.d4 Nf6+=) +=. Trkn – guest298, ICC, 2004.

4.ab5 Nb4 5.bc6 Nc6 6.Nf3 a6 7.Be2 f5 (7...e5 8.Bb2 Qc7 9.Nc3=) 8.Bb2+= h6? (8...Qb6 9.Ra2+=) 9.0–0 (9.Ng5 d5 10.Bh5 Kd7 11.Nf7+–) 9...e6+/– 10.c4 d6 11.d3 Rh7 (11...e5 12.Nc3+=) 12.Nd4 Nd4 13.Bd4 Bb7 14.Bh5 Kd7 15.Nd2 e5 16.Bc3 Ne7 17.e4 f4?? (better is 17...g6 18.Bf3 Qc7+/–) 18.Qg4 Kc7 19.Ba5 Kc6 20.Bd8 Rd8 21.Qd1 Nc8 22.Nb3 g5 23.Na5 Kb6 24.Qb3 Ka7 25.Qa4 Nb6 26.Qa2 Ba8 27.Rfb1 Rb8 28.Nc6 (28.Nc6 Kb7 29.Nb8 Kb8 30.Rb6 Bb7 31.Qa6 Kc8 32.Bg4 Kd8 33.Rb7 Rc7 34.Rc7 Kc7 35.Qc8 Kb6 36.Ra6) 1–0. Valpa – Tiraspol3000, playchess.de, 2002.

4.ab5 cb5 5.Ba3+=.

3.e3 Bb7

4.Bb2 d5 5.ab5+/– cb5 (5...a6!? 6.ba6 Na6+–) 6.Bb5+– Bc6 7.Qe2 Nf6 8.Nf3 e6 9.Ne5 Bb5 10.Qb5 Nbd7 11.Nc6 Qc7 12.Bf6 gf6 13.Nc3 Bd6 14.e4 0–0 15.ed5 Rfc8 (15...Nb6 16.Ne4+–) 16.de6 (better is 16.Qe2!? a6 17.0–0 Nb6+–) 16...fe6 17.Nd4 Nf8 18.Ra6 (18.Ra4 Be5 19.Nde2 a5 20.Ra5 Rcb8+–) 18...Rab8 19.Qe2 Qd7? (better is 19...Bb4 20.0–0 Bc3 21.dc3 Rb6 22.Rb6 Qb6+–) 20.Ndb5 Bb4 21.Ra7 Rb7 22.Rb7 Qb7 23.Qg4 Ng6 24.Qb4 Qg2 25.Qe4 Qe4 26.Ne4 Rc2 27.Ke2 (27.Nf6?! Kf7 28.Ke2 Kf6+=) 27...f5 28.Nec3 Rb2 29.Ra1 Rb4 30.d4 Kf7 31.Ra7 Ne7 (31...Kg8 32.Ke3+–) 32.d5 Kf6 (32...Rb2 33.Kd1 Kf6 34.Ra6 Rf2 35.d6+–) 33.d6 Rb2 (33...Nc6 34.Rh7 Rg4 35.h4+–) 34.Ke3 Nc6 35.Rh7 e5 36.Rc7 (36.d7 Nd8+–) 36...f4 (36...Nb4 37.Rc8 Ke6 38.Re8 Kd7 39.Re7 Kc8 40.Re5 f4 41.Ke4+–) 37.Kf3 Nd8 38.Ne4 Kf5 39.d7 Rb3 (39...Ke6 40.Nbc3 Rb3 41.Kg4+–) 40.Nbc3 Ne6 (40...Ke6+–) 41.Rc8 Nd4 42.Kg2 Rb6 43.Rf8 Kg4 Black plans f3 44.h3 Kh5 45.Rh8 Kg6 46.d8Q f3 47.Kh2 Rc6 48.Qg8 1–0. phildo (1810) – alfil813 (1795), gameknot.com, 2013.

4.ab5 cb5 5.Bb5?? e6 (5...Bg2 6.Bb2 Bh1 7.Be2–+) 6.c3?? (6.Nf3 Bb4 7.Ba3 Ba3 8.Na3=) 6...a6 (6...Bg2!? 7.Nf3 Bh1 8.d4–+) 7.Bd3?? (7.Bf1 Nf6+–) 7...g6 (better 7...Bg2 8.Be4 Be4–+) 8.f3 (8.Nf3 a5+–) 8...h5 (8...Bd6 9.g3+–) 9.Ne2 (9.Nh3 Nc6+–) 9...Qh4 10.Ng3 Bd6 11.f4?? (better 11.Kf2+–) 11...Bg2–/+ 12.Rg1? (better 12.Kf2 Bh1 13.Qh1–/+) 12...Qh2–+ 13.Qe2 (13.Rg2 Qg2 14.Nf1–+) 13...Qg1 (13...Qg3?! 14.Kd1 Qh2 15.Rg2 Qh1 16.Kc2–/+) 14.Nf1 g5! 15.Qf2 (15.fg5 Bc6 Decoy) 15...Qh1 16.Ke2 (16.Bb2 gf4 17.c4 Be7–+) 16...gf4 17.ef4 Nf6 18.Ng3 Qh3 19.Qe3 (19.Na3 Nd5 20.Kd1 Rg8–+) 19...Ng4 (better 19...Qg4!? 20.Ke1 Bf4 21.Be2 Qg3 22.Qg3 Bg3 23.Kd1–+) 20.Qd4 Qg3 21.Qd6 Qf3 (21...Bf3 22.Kf1 Qf2) 22.Ke1 Qf2 23.Kd1 Bf3 (23...Ne3! 24.de3 Bf3 25.Be2 Qe2) 24.Kc2–+ Nc6 (24...Ne3 25.Kb3 Bd5 26.Kb2 Nd1 27.Kc2–+) 25.Ra6 (25.b5 Ne3 26.Kb2 Nd1 27.Kc2 Rb8 28.Ra6 Rb7–+) 25...Ra6 26.Ba6 Be4 27.Kb2 Bb1 (better 27...Ne3! 28.Ka1 Qg1 29.Kb2 Nd1 30.Ka2 Nc3 31.Nc3 Qc1 32.Bc8 Bb1 33.Nb1 Nb4 34.Qb4 Qc8 35.Na3–+) 28.Kb1 f5 (28...Qb6 29.b5 Nf6 30.d3–+) 29.Bc8 (29.Bb5 Kf7 30.Qd7 Ne7 31.Bc4–+) 29...Kf7 (better 29...Qa7 30.b5 Kd8–+) 30.Qd7 Kg6?? (better 30...Ne7 31.Qe6 Kf8–+) 31.Qc6–/+ Qf4 32.Qe6 Nf6 33.Bd7 (33.d3 Qf3 34.Ba6–/+) 33...Rf8 (33...Qe4 34.Qe4 fe4 35.Bh3–+) 34.Kc2 (34.Bc6=+) 34...Kg7 (better 34...Qe4 35.Qe4 fe4–/+) 35.Qe7?? (better 35.Qf5 Nd7 36.Qd7 Rf7 37.Qd3+=) 35...Rf7–+ 36.Qe3 (36.Qe2 Rd7 37.d4–+) 36...Qb8 (better 36...Qe3 37.de3 Rd7–+) 37.Bf5+– Ra7?? (better 37...Qd6+–) 38.Qg5+– Kf8 (38...Kf7 39.Qg6 Ke7 40.Qg7 Kd8 41.Qf6 Re7 42.Qd4 Kc7 43.Qc5 Kd8+–) 39.Qf6 Ke8 40.Qh8 Kf7 41.Qb8 Ra2 42.Kb3 (better 42.Kb1 Ra6 43.Qb7 Kf6 44.Qa6 Kf5 45.Qd3 Kg4+–) 42...Ra1 43.Kb2 (43.Bb2 Ra6 44.c4 Rc6 45.Qb7 Rc7 46.Qc7 Kf8 47.Bg6 h4 48.Qd8) 43...Ra5 44.Qb7 (44.ba5 Kg7 45.d4 h4 46.Qe5 Kf7 47.Bh6 h3 48.Qe6) 44...Kf6+– 45.Qb6 Kf5 46.Qa5 Kg4 47.Qh5! Kh5 48.b5 Kg6 49.b6 Kf7 50.b7 Ke7 51.b8Q Ke6 52.Qd8 Ke5 53.c4 Ke6 (53...Kf4 54.Qh4 Ke5 55.d4 Ke6 56.Qh7 Kf6 57.d5 Ke5 58.Qe7 Kd4 59.Kb3 Kd3 60.Qe3) 54.c5 Ke5 55.Qd6 Ke4 56.d3 Kf5 57.Qf4 Ke6 58.d4 (58.Qe4 Kf7 59.Qf5 Ke8 60.c6 Ke7 61.d4 Ke8 62.Qe6 Kd8 63.Qd7) 58...Kd7 (58...Kd5 59.Qe5 Kc4 60.c6 Kd3 61.c7 Kc4 62.c8Q Kb4 63.Qcc5 Ka4 64.Qb5) 59.Qd6 Ke8 60.c6 Kf7 61.c7 Ke8 (61...Kg7 62.Qe7 Kg6 63.c8Q Kh5 64.Qf5) 62.c8Q Kf7 63.Qcc7 (63.Qcf8) 63...Ke8 64.Qdd8 (64.Qcd7) 1–0. afsharian – Abhisheks, lichess.org, 2019.

4.Nf3 e6 5.Bb2 Bb4 6.ab5?! Nf6=.

4.Nf3 e6 5.Bb2 Bb4 6.Bg7 Bd2 7.Nbd2+–.

4.Nf3 e6 5.Bb2 Nf6 6.ab5 Bb4 7.c4 (7.Ra4 Be7) 7...0–0= 8.Nc3 cb5 9.cb5 d5 (9...a6 10.ba6 Na6 11.Ra4=+) 10.Be2 Nbd7 (10...d4 11.Nd4 Bg2 12.Rg1) 11.0–0 Bd6 12.d4 Qc7 13.Rc1 Qb8 14.g3 (14.Qa4 Nb6 15.Qc2 a6=) 14...Nb6 15.Na4 (15...Nc4 16.Bc4 dc4 17.Nd2=+). Mothes,Rainer – Hirtreiter, corr SOK–89–32, 1989.

4.Nf3 e6 5.ab5 cb5 6.Bb5 Bb4 7.0–0 (7.Ra4 Be7) 7...Nf6 (7...Qf6 8.Nd4=) 8.c3 (8.d4 a6 9.Bd3 0–0) 8...Be7= 9.d4 0–0 10.Nbd2 d6 11.Ba3 Qc7 12.Qc2 Rc8 13.Rfc1 Nbd7 14.Bd3 Nb6 15.c4 h6 16.Nb3 (16.e4 Nfd7) 16...a5 17.Qe2 Ne4 (17...a4 18.c5 Qd7 19.cb6 ab3 20.Rcb1) 18.Rc2 (18.c5 dc5 19.Nc5 Nc5 20.Bc5 Bc5 21.Rc5 Qd6) 18...Qd7 (18...a4 19.Nbd2 f5 20.d5 ed5 21.cd5=) 19.c5 Na4 20.Rac1 dc5 21.Ne5 Qd5 22.Bc4 Nec3 23.Qf1 Qe4 24.Nd2 (24.Bd3 Qh4 25.Rc3 Nc3 26.Rc3 cd4 27.Rc8 Rc8 28.Be7 Qe7 29.Na5 Qc7) 24...Qf5 25.Bd3 (25.Rc3 Nc3 26.Rc3 cd4 27.ed4 Ba3 28.Ra3 Qf4) 25...Qh5 26.Rc3 Nc3 27.Rc3 cd4 28.Rc8 Rc8 29.Be7 Qe5 30.Nc4 Qc7 31.Bd6 Qd8 32.Ba3 (32.Be5 de3 33.fe3 Qd5=) 32...Ba6 33.ed4 Bc4 34.Bc4 Qd4 35.Ba6 Rc2 36.Qe1 Ra2 37.Bc1 Ra1 38.Bf1 a4 (39.h4 a3–+ (39...Qh4?! 40.Qc3 Qf6 41.Qc8 Kh7 42.Qc2 Qg6 43.Qc3–/+)) 0–1. Andersson,Lars H – Rosenhahn,Eberhard, corr ICCF TT–4–90–5, 1992.

4.Nf3 a6

5.Bb2 e6.

5.c4 bc4=

6.Bc4 e6

7.Ba3 Qb6.

7.Ba3 Nf6.

7.Bb2 Bb4?? 8.Bg7 d5 9.Bd3+– (9.Bh8?! dc4 10.Ne5 c5 +–).

7.Bb2 Nf6= 8.b5 ab5 9.ab5 Ra1 10.Ba1 cb5 11.Bb5 Qa5 12.Nc3 Bb4 13.Be2 0–0 14.0–0 Rc8 15.Qb3 Nd5 16.Rb1+/– Na6? 17.Qb2?? Nc3 18.dc3+– Rc3 19.Ba6 Ba6 20.Qc3!! (20...e5 21.Rb4+–; 20.Qb4?? Qb4 21.Rd1 Qb3–+) 1–0. Kreuzer,Uwe – Buechling,Th, corr BDF H–143–E, 1993.

7.Bb2 Nf6 8.Bc3 d5=.

7.Bb2 Nf6= 8.Bc3 Nd5=.

7.Qb3 Qb6 8.Ba3 a5 9.ba5 Qb3 10.Bb3=.

7.Qb3 Qb6 8.Ba3 d5 9.Be2 a5 10.b5 Ba3 11.Qa3 cb5 12.ab5 Nd7 13.d4 Ne7 14.0–0 Nc8 15.Rc1+/– Nd6 16.Ne5 Ne5=+ 17.de5 Nf5 18.Nc3 d4 19.Na4 Qd8 20.Nc5 Bg2? 21.e4?? Nh4= 22.Nb7 Qe7 23.Nd6 Kf8 24.b6 (24...Be4 25.Ne4 Qa3 26.Ra3+–) 1–0. Harding,Timothy David – Linklater, corr (Irish Ch), 1989.

7.Qb3 Qb6 8.Ba3 d5 9.Be2 a5 10.b5 c5 11.d4 Nd7 12.0–0 Rc8 (12...Rc8 13.Rc1 Ngf6=; 12...Bd6 13.dc5 Nc5 14.Bc5 Bc5 15.Rc1=). Katalymov – Gorenshtein, Lvov, 1953.

7.Qb3 Qb6 8.Ba3 d5 9.Be2 Nf6 10.d4 Nbd7 11.0–0 Bd6 12.Nc3 0–0 13.Nd2 e5 14.de5 Ne5 15.Rfb1 Neg4 16.Bg4 Ng4 17.Nf3 Rfb8 18.b5 Ba3 19.Ra3 ab5 20.ab5 Qc5 (20...Ra3 21.Qa3 c5 22.Na4=) ½–½. Dluhosch,Thomas – Gurski,M, corr BdF, 1985.

7.Qb3 c5 8.b5=.

3.e3 e6

4.Bb2 Bb4?? 5.ab5?! Nf6=.

4.Bb2 Bb4?? 5.Bg7+– Qe7 6.ab5 cb5 7.Nf3 Bd2 (7...Nc6+–) 8.Nbd2 Nc6 (8...b4 9.Nc4 f6 10.Nd6 Kd8 11.Bh8+–) 9.Bb5 a6 10.Bc6 dc6 11.Bh8 Bd7 12.Ne5 0–0–0 13.Ra6 Kb7 14.Qa1 Kc7 15.Qa5 Kd6 (15...Kb7 16.Ra7 Kb8 17.Qc7) 16.Ne4 1–0. Janek – Ramcal, internet, 2019.

4.Bb2 Bb4?? 5.Bg7+– Be7 6.Bh8 b4 7.d4+–.

4.Bb2 Nf6 5.c3 Bb7 6.Nf3 (6.ab5 cb5 7.Nf3 a6=) 6...Be7 (6...ba4!? 7.Ra4 a5=) 7.ab5+/– c5 (7...0–0 8.bc6 dc6 9.d4) 8.bc5 Bc5 9.c4 0–0 10.Be2 (10.d4 Be7) 10...a6 11.0–0 ab5 12.Ra8 Ba8 13.cb5 d5 (13...Bf3 14.Bf3 d5 15.Qe2) 14.d4+– Bd6 15.Qc2 Nbd7 16.Bd3 (16.Ba3 Ba3 17.Na3 Qb6) 16...Qc7 (16...Qe7!?) 17.Qc7+– Bc7 18.Rc1 Bb6 (18...Rc8 19.Nc3 Nb6 20.Ba3+–) 19.Ba3 Re8 20.Bd6 Bb7 21.Nbd2 (21.Ne5 Ne5 22.Be5 Ra8+–) 21...Rc8 22.Rc8 Bc8 23.Nb3 Ne8 24.Bc5 Bd8 25.Kf1 Nef6 26.Nfd2 Bb7 27.Bd6 Ne4 28.Ne4 de4 29.Bc2 Bd5 30.Ke1 Nb6 31.Nc5 Nc4 32.Bg3 Nb2 33.Be4 Ba5 34.Ke2 Bc4 35.Kf3 Bb5 36.Nb7 Bb4+/– 37.Bd6 Nd3?? 38.Bd3+– Bc6 39.Be4 (39...Bb7 40.Bb4 (40.Bb7?! Bd6 41.g3 h6+/–) 40...Be4 41.Ke4+–) 1–0. Nielsen,Joergen Axel (2100) – Moeller Hansen, Nakskov, 1970.

4.ab5 Bb4 5.Qg4 Bf8=.

4.c3 Bb7 5.ab5 cb5!? 6.Qe2 Bc6.

4.c3 Bb7 5.ab5 cb5!? 6.Nf3 a5.

4.Nf3 Bb4= 5.Bb2 Nf6 6.ab5 0–0 7.Be2 (7.Ra4 Be7=) 7...cb5 8.Nc3 (8.Bb5 a5=) 8...Bc3 9.Bc3 Nd5 (9...Ba6 10.Qb1=) 10.Ba5 Qf6 11.Bb5 Bb7 (11...Ba6 12.Ba6 Na6 13.d4=) 12.c4 Nb6 (12...a6 13.Ba4 Ne7 14.Bc3=) 13.0–0 Rc8 14.Bb6 ab6 15.Ra8 Ba8 16.Qa1 Bf3 17.Qf6 gf6 18.gf3 Nc6 (18...d5 19.cd5 Rc5 20.de6 Rg5 21.Kh1 fe6 22.Rb1+/–) 19.f4 e5 (19...Na5 20.d3+=) 20.f5 (20.Rb1 ef4 21.Ba6 Rb8+=) 20...Kf8 (20...Na5 21.d3+=) 21.Rb1 Ke7 22.Kg2 Na5 23.Ba6+/– Rc6 24.Rb4 Rd6 25.Rb2+/– Rc6 26.Bb5 Rd6 27.Kf3 Nb7 28.Ke2 Nc5 29.f3 Rd3 30.Ra2+/– Rd6 31.Ra1 Rd3 32.Ba4 Rd6 33.Bc2+/– Kf8 34.Ra7 Kg7 35.d3 b5? 36.cb5+– Rb6 37.d4 ed4 38.ed4 Nb7 39.Bd3 Nd6 40.Ra6 Nc8 41.Kd2 Ra6 42.ba6 Kf8 43.Be4 Ke7 44.Bb7 Na7 45.Kc3 Kd6 46.Kb4 (46...Kc7 47.Ka5+–) 1–0. Pommerel,Wim – Hauwert,N, corr NLD Mkl, 1997.

2.a4 Nc6

3.ab5 Ne5 4.d4 (4.Bb2 Nc4 5.Bc3 Nf6 6.e3 Bb7 7.Nf3 Nb6 8.Be2 e6 line) 4...Ng6 5.e4 Bb7 6.Nc3 e6 (6...e5 7.Ra4 Bd6 8.Nf3+–) 7.Rb1 Nf6 8.f3 (8.Bd3 a6 9.ba6 Ba6+–) 8...Be7 9.Bd3 e5 (9...0–0 10.Nge2+–) 10.Nge2 d5 11.0–0 (11.Be3 de4 12.Ne4 Nd5+–) 11...ed4 12.Nd4 de4 13.Be4 Ne4 14.Ne4 0–0 15.Be3 (15.Nc5 Bd5+–) 15...Re8 16.Qd3 (16.Qe2 Qd5+–) 16...a5 17.ba5 Ra5 18.Rbd1 (18.Ra1 Ra1 19.Ra1 Qd7+–) 18...Ra3 19.Qe2 Qc8 20.Bc1 Ra5 (20...Ra8 21.Qf2+–) 21.Qc4 (21.Qd2 Ra4+–) 21...Ne5 22.Qc3 Ra4 23.Bf4 Nc4 24.Rfe1 (24.Ra1 Na3+=) 24...Bf8 25.Qb3 (25.Ra1 Na3 26.Be3 Be4 27.fe4 Re4+–) 25...Rb4+= 26.Qa2 Bd5 (26...c5 27.c3 Rb2 28.Qc4 cd4 29.Qd4 Rb5 30.Nd6 Bd6 31.Bd6+=) 27.Nc6 (27.Nc3 Ba8 28.Re8 Qe8 29.Qa7+– (29.Bc7 Qe3 30.Kf1 Qc3–+)) 27...Rb2+= (27...Rb5? 28.Rd5 Rd5 29.Qc4+–) 28.Qa1 Bc6 (28...Rb5? 29.Na7 Qd7 30.Nb5 Qb5 31.Rd5 Qd5 32.Nf6 gf6 33.Re8+–) 29.bc6 Rb6 30.Qd4 Rc6 31.Qd5 Ree6 32.Kf2 (32.Ng5 Nb6 33.Qd3 Re1 34.Re1 g6=) 32...h6 33.c3 Qe8 34.Kf1 (34.Qb5 Na3 35.Qf5 Nc4=) 34...Nd6= 35.Nc5 Re1 36.Re1 Qa8 37.h4 (37.Rb1 Ra6 38.Qd3 Ra1=) 37...Nb5 38.Ne4 Qa6 Attacks the isolani on c3 39.Qd3 Qa4 40.Be5 Qc4 41.Qc4 Rc4 42.Ke2 f6 43.Kd3 Re4 44.Re4 fe5 45.Re5 Nd6 46.g4 Kf7 47.h5 Ne8 48.Re1 Bd6 49.c4 Nf6 50.Kd4 ½–½. Marekt – Frank Schaefer, internet, 2020.

3.ab5 Nb4

4.c3 Nd5+= 5.e4 Nb6 (5...Ndf6 6.e5 Nd5 7.d4+–) 6.d4 Nf6 7.Bd3 d5 (7...c6 8.c4 cb5 9.cb5+–) 8.e5 White fights for the Initiative 8...Ne4? (8...Ng8 9.Nf3+–) 9.Nf3?? (better 9.f3 Nd6 10.ed6 Qd6 11.Ne2+–) 9...Nc4+– 10.Qb3 e6 (10...Bb7 11.Bc4 dc4 12.Qc4+–) 11.Bc4+– dc4 12.Qc4 Be7? (12...Bb7 13.0–0+–) 13.Nbd2?? (13.Qc6!? Bd7 14.Qe4 Bb5+–) 13...f5 (better 13...Nd2!? 14.Nd2 Bb7+–) 14.Ne4+– fe4 15.Nd2 (15.Ng5 c5 16.Ne4 cd4+–) 15...Bh4 (15...Qd5 16.Qc7 e3 17.fe3 Qb5 18.Ba3 Bh4 19.g3+–) 16.Ne4 Bb7 (16...Qd5 17.Qd5 ed5 18.Nc5+–) 17.Nc5 (17.Qe6 Qe7 18.Qg4 Be4 19.Qe4 0–0+–) 17...Bg2 (17...Qd5 18.Qd5 Bd5 19.Rg1+–) 18.Qe6 (18.Ne6 Qc8 19.Rg1 Be4+–) 18...Qe7? (18...Be7 19.Rg1 Bd5 20.Qg4+–) 19.Qe7 (19.Rg1!? Qe6 20.Ne6 Kf7 21.Nc7 Rac8 22.Ra7 Be4+–) 19...Be7 20.Rg1 Bf3 21.Rg7 h5 (21...Bc5 22.dc5 Rd8 23.Be3+–) 22.Ne6 Kd7 (22...c6 23.Nc7 Kd7 24.Na8 Ra8 25.Bg5 cb5 26.Re7 Kc6 27.Ra6 Kd5 28.Rd7 Kc4 29.e6+–) 23.Nc7! Rac8 (23...Kc7 Theme: Deflection from e7 24.Re7 Eliminates the defender e7) 24.Na6 (24.Ra7!? Rc7 25.Rc7 Kc7 26.Re7 Kb6+–) 24...Rc3 (24...Kd8 25.Ba3 Re8 26.Kd2+–) 25.Ba3 Re8 26.Be7 Re7 27.Nc5 Rc5 (27...Ke8 28.Re7 Ke7 29.Ra7 Ke8 30.b6+–) 28.Re7 (28.Ra7!? Rc7 29.Re7 Ke7 30.Rc7 Ke6+–) 28...Ke7 29.Ra7 Ke6 30.dc5 Ke5 31.Rd7 Bg4 32.c6 Ke6 33.b6 Bf3 34.b7 Bc6 35.b8Q Bd7 (35...Kd7 36.Qe5+–) 36.Qh8 h4 37.Qh4 Ke5 (37...Bc6 38.Qh6 Kd7 39.h4+–) 38.Qe7 Be6 39.Qe6 (better 39.f4 Kd5 40.h4+–) 39...Ke6 40.Ke2 Kf5 41.Kf3 Kg5 42.Kg3 Kh5 43.h4 Kg6 44.Kg4 Kh6 45.h5 Kg7 46.f4 Kf6 47.Kh4 (better 47.h6!? Kg6+–) 47...Kf5 48.Kg3 Kf6 49.Kg4 Kg7 50.Kg5 Kf7 51.Kf5 (better 51.Kh6+–) 51...Kg7 52.Kg4 (52.h6 Kg8 53.Kg6 Kh8+–) 52...Kf6 53.f5 Kg7 (53...Kf7 54.Kg5 Kg7 55.h6 Kf7 56.h7+–) 54.Kg5 Kh7 (54...Kf7 55.Kh6 Kg8+–) 55.Kf6 Kh6 56.Ke7 Kh5 57.f6 Kg4 58.f7 Kf4 59.f8Q (59.f8Q Ke4 60.Qf6+–) 1–0. Trkn – Harry N., itsyourturn.com, 2001.

4.c3 Nd5+= 5.e4 Nb6 6.Nf3 (6.d4 c6+–) 6...Bb7 7.Bd3 (7.e5 c6+=) 7...d6 (7...c6 8.bc6 Bc6 9.0–0+=) 8.0–0 e5 (8...Nf6 9.Qe2+=) 9.Bb2 (9.Qe2 Nf6+–) 9...Nf6+= 10.Qe2 Qd7 11.Bc2 (11.Rd1 Nh5 12.g3 Nf6=) 11...Be7 (11...Nh5!? 12.Re1 Nf4=) 12.d4+– 0–0 (12...ed4 13.cd4 d5 14.Nbd2+–) 13.Rd1 (13.de5 de5 14.Ne5 Qe6+–) 13...Qg4 Can e4 get defended? (13...ed4 14.Nd4 c5 15.Nf5+–) 14.Nbd2 Nh5 (better 14...ed4 15.h3 Qh5 16.cd4 c6 17.bc6 Bc6+=) 15.d5 (better 15.de5 de5 16.Qf1+–) 15...Nf4=+ Threatening mate: Qxg2 16.Qf1 a6 17.c4 ab5 18.cb5 Qg6 (18...f5 19.ef5 Bd5 20.Ra8 Ra8 21.Ra1–/+) 19.g3? (19.Bb3 Bc8=) 19...Bc8 (better 19...Nfd5!? 20.Bb3 Ra1 21.Ra1 Nf4–/+) 20.Ra8= Na8 21.Ra1 Bh3 22.Qc4 Rc8 23.Qc6 (23.Bb3 Nb6 24.Qc2 Bd7=) 23...Nb6 24.Bd1 (24.Kh1 Bd7 25.Qc3 Nh3=) 24...Nd3 (better 24...Bd7 25.Qc3 f5–/+ (25...Bb5?! 26.Qb4 Bd7 27.Ne5 de5 28.Qe7=)) 25.Bc3? (25.Qc2 Nb2 26.Qb2 f5=+) 25...Nc5 (better 25...Bd7!? 26.Qb7 Nc5–+) 26.Ra7–/+ Exerts pressure on the backward pawn 26...Bd7 (26...Ne4 27.Ne5 Qf5 28.Nef3 Nc3 29.Qc3 Nd5 30.Qc4=+) 27.Ne5=+ de5 28.Qg6 hg6 29.Be5 Bd6 30.Bd6 (30.Bd4 Bb5 31.e5 Bf8–/+) 30...cd6 31.Nb3? (31.Be2!?=+) 31...Ne4 (better 31...Bh3 32.Nc5 Rc5–+ (32...dc5?! 33.f4=)) 32.Kf1?? (better 32.Rb7 Nc3 33.Rb6 Nd1 34.Nd4–+) 32...Bb5–+ 33.Be2 Be2 34.Ke2 Nd5 35.Nd4 (35.f3 Ndc3 36.Kf1 Rb8–+) 35...Re8 (35...Rb8 36.Kf3 Ndc3 37.Ne2–+) 36.Kf1 (36.Kf3 Nd2 37.Kg2 Re7 38.Ra8 Kh7–+) 36...Nd2 (36...Rb8 37.Ra5 Ndc3 38.f3 Rb1 39.Kg2 Rb2 40.Kg1–+) 37.Kg2 Nf6 (37...Re7 38.Ra6 Nc4 39.Nb5–+) 38.h3 (38.h4 d5–+) 38...d5 39.f3 (39.g4 g5–+) 39...Rb8 40.g4 (40.Ra2 Nc4–+) 40...Rb2 41.Kf2 Nb3 42.Ke3 Nd4 43.Kd4 g5 44.Ra8 Kh7 45.Ra3 Rh2 (45...Kg6 46.Ra1–+) 46.f4 gf4 47.Ke5 Rf2 48.Kf5 (48.g5 Nh5 49.Kd5 Kg6–+) 48...f3 (48...Nd7 49.Kg5 g6 50.Ra6 f6 51.Rf6 Nf6 52.Kf6 Re2 53.Kg5 f3 54.Kf4 f2 55.h4 f1Q 56.Kg3 Qf2 57.Kh3 Qe3) 49.Kf4 Kg6 50.Rf3 (50.Rd3–+) 50...Rf3 51.Kf3 Kg5 (51...Kg5 52.Ke2 Ng4–+) 0–1. Trkn – Lazar, itsyourturn.com, 2000.

4.c4 a6 5.d4 e5 6.de5 Bc5 7.e3 Qg5 8.Nf3 Qe7 9.Bb2 d5? (better is 9...Bb7+/–) 10.ed6+– cd6 (10...Qe4 11.Na3 ab5 12.dc7+– (12.cb5?! Ra3 13.Ra3 Nc2 14.Ke2 Na3 15.Bg7 Bf5+/–; 12.Bg7?! Ra3 13.Ra3 Nc2 14.Ke2 Ba3+–)) 11.Bg7 Nf6 (11...Bf5 12.Bh8 Nc2 13.Ke2 Be3+–) 12.Bh8 Bf5 13.Na3 Ne4 (13...ab5 14.Bf6 (< 14.cb5 Ra3 15.Ra3 Nc2 16.Ke2 Ba3+–) 14...Qf6 15.Nd4 Bd4 16.Qd4 (16.ed4?! Ra3 17.Qe2 Kd8 18.Ra3 Nc2 19.Kd1 Na3+–) 16...Qd4 17.ed4 Ra3 18.Ra3 Nc2 19.Kd2 Na3 20.cb5+–) 14.Be2 Nc3 15.Bc3 ab5 16.0–0 Qe4 17.Nd2 Qe6 18.Nb5 Qg6 19.Ra8 Kd7 20.Nf3 Bh3 21.Ne5 (21...Ke7 22.Ng6 fg6 23.Bb4 Bc8 24.Bc5 dc5 25.Qd6 Kf7 26.Ra7 Bd7 27.Rd7 Ke8 28.Nc7) 1–0. hal1958 – dc, HCL–T067 playchess.de, 2003.

4.c4 e5 5.Bb2 d5 6.Be5 dc4 7.e4 Bd6 8.Bg7 f6 9.Bh8 Be5 10.Nc3 Nd3 11.Bd3 Qd3 12.Nf3 Bc3 13.dc3 Qe4 14.Qe2 Bf5 15.Nd4 0–0–0 16.Qe4 Be4 17.0–0 Kb7 18.f3 Bd3 19.Ra7 Kb6 20.Rc7 Bf1 21.Kf1 Ra8 22.Rc4 Ra7 23.Rc6 Ka5 24.Rf6 Nf6 25.Bf6 Kb6 26.g4 1–0. Trkn – Martin, itsyourturn.com, 2000.

4.e4 a6 5.c3 Bb7 6.cb4 ab5 7.Ra8 Qa8 8.Nc3 Be4 9.Nb5 (9.f3 Bc6+–) 9...Qb7 10.Qa4 c6 (10...Nf6+–) 11.Nc3 Nf6 12.Ne4 Ne4 13.b5 cb5 14.Bb5+– 1–0. Buczinski,Henryk (2065) – Andryszczuk,M, corr 2MPS Poland, 1998.

4.e4 Bb7 5.c3+– a6 6.cb4 ab5 7.Ra8 Qa8 8.d3 (8.Bb5 Be4 9.Qg4 Nf6 10.Bd7 Nd7–+) 8...f5 (8...e5 9.Bd2+–) 9.Bb2 fe4 10.Qh5 (10.de4 Be4 11.Bb5 Qd5 12.Qd5 Bd5+–) 10...Kd8 11.Qb5 ed3 12.Nd2 (12.Bd3 Bg2 13.Qf5 Nh6–+; 12.Qd3?! Bg2 13.Bg2 Qg2+/–) 12...Nf6 13.Ngf3 (13.Bd3?! Bg2 14.Bf6 Bh1=; 13.Qd3?! Bg2 14.Bg2 Qg2+/–) 13...Ba6 14.Qa5 e6 (14...Qc6+–) 15.Bd3! Bb4 (15...Bd3 16.Qa8) 16.Qa1 (16.Qb4?! Bd3 17.Qc3 Qd5+–) 16...Bd2 17.Kd2 Ne4 18.Be4 Qe4 19.Qa6 Qf4 20.Ke2 Qe4 21.Kf1 Ke7 (21...Rg8 22.Qa1+–) 22.Qa3 d6 23.Qc3 Qb1 24.Ne1 e5 (24...Kd8 25.Qg7 Re8 26.Qg5 Kc8 27.Bf6+–) 25.Qc7 Ke6 26.Ba3 Qb5 27.Kg1 Qd7 28.Qc4 Ke7 29.h4 (29.Qd3 Ra8+–) 29...Rc8 30.Qe4 h5 (30...Kd8 31.Qh7 Qe7 32.Rh3+–) 31.Rh3 (better is 31.Qe5 Kf7 32.Qh5 Kf8 33.Bd6 Kg8 34.Qd5 Qf7 35.Qf7 Kf7+–) 31...Rh8 (31...Kd8+–) 32.Qe5 Qe6 (32...Kd8 33.Bd6 Qf7 34.Qa5 Kc8 35.Rc3 Kd7 36.Qc7 Ke6 37.Re3 Kf6 38.Be5 Kg6 39.Rg3 Kf5 40.Rg5 Ke4 41.Qc6 Qd5 42.Qg6) 33.Bd6 (33.Qg7 Kd8 34.Qh8 Kd7+–) 33...Kf7 (33...Kd7 34.Rd3 Qe5 35.Be5 Ke6 36.Bg7 Rc8+–) 34.Rf3 Qf6 35.Qe7 Kg6 36.Rf6 gf6 37.Nd3 Rh7 38.Nf4 Kh6 (38...Kf5 39.Qe6) 39.Qf6 1–0. Taulien,Hans_Juergen – Fritz,Marco, remoteschach.de, 2002.

4.e4 Bb7 5.c3 Be4?? 6.cb4 Qb8 7.Nc3 Bb7 8.d4 e6 9.Ba3 Nf6 10.Nf3 Bd6 11.Bd3 c6 12.0–0 cb5 13.Nb5 Bf3 14.Nd6! Qd6 15.Qf3 0–0 16.b5 Qd4 17.Bf8 Rf8 18.Qe2 Nd5 19.Qe4 Qe4 20.Be4 Nc3 21.Bd3 Rb8 22.Ra7 d5 23.Rfa1 g6 24.Ra8 Ra8 25.Ra8 Kg7 26.b6 1–0. Trkn – Lazar, itsyourturn.com, 2001.

4.e4 Bb7 5.c3+– Be4 6.cb4 Nf6+–.

4.e4 d5 5.e5 Bf5 6.Na3 e6 7.d4 c5 8.bc6 Qa5 9.Bd2 Qa4 10.Nb5 Nc2 0–1. Trkn – Psychotic Neurotic, itsyourturn.com, 2000.

4.e4 e5 5.c3 Bc5 6.cb4 Bd4 7.Nc3 Qf6 (7...Nf6 8.Nf3+–) 8.Nf3 d5 (8...Bb7+–) 9.Nd4 ed4 10.Nd5 Qe6 (10...Qd8 11.Qc2 Rb8+–) 11.Nc7 Kd7 12.Ne6 Ke6 13.Qg4 Ke5 14.Qg7 (14.Qg7 Kd6 15.Qh8+–) 1–0. DEFFM – AbdellahAitmoussa, freechess.org, 2018.

4.e4 e5 5.c3 d5 6.cb4 de4 7.Qb3+–.

4.e4 e5 5.c3 Nf6 6.Qb3 (6.cb4 Ne4 7.Qe2 Bb7+–) 6...c5 (better 6...Ne4 7.cb4 Bb7+–) 7.cb4 Ne4?? (7...cb4 8.Nf3 Bc5+–) 8.Qd5 Qf6 (8...Nf2 9.Kf2 (9.Qa8?! Nh1 10.g3 cb4+–) 9...Qh4 10.Ke2 Qh5 11.Nf3+–) 9.Qe4 (9.Qa8?! Qf2 10.Kd1 Qf1 11.Kc2 Nf2 12.Qc8 Ke7+–) 9...Rb8 10.Ra7 cb4 11.d4 Rb7 (11...Qe6 12.Qe5 Bd6 13.Qe6 de6+–) 12.Rb7 Bb7 13.Qb7 ed4 14.Qb8 (14.Bd3 Bd6+–) 14...Ke7 (14...Qd8 15.Qe5 Qe7 16.Qe7 Be7 17.Nf3+–) 15.Bc4 (better 15.Bd3+–) 15...d6 (15...Qg6 16.Qe5 Kd8+–) 16.Bg5! Qg5 (16...Qg5 17.Qc7 Mate attack) 17.Qc7 Kf6 18.Qf7 Ke5 19.Qe6 Kf4 20.Ne2 1–0. GuestBDPM – GuestLWFD, freechess.org, 2019.

4.e4! e6 5.c3 Qh4 6.d3 Bc5 7.Nh3 Nf6 8.cb4 Bb4 9.Bd2 Bd2 10.Nd2 Bb7 11.Qc1 c6 12.bc6 Bc6 13.Qc5 Qh5 14.e5 Nd5 15.Nc4 f6 16.d4 Qg6 17.Nd6 Kd8 18.ef6 gf6 19.Be2 Qg2? 20.Rg1 Qh3 21.Nf7 Kc8 22.Ba6 Kc7 23.Qd6 Kb6 24.Rg3 Qg3 25.hg3 1–0. Bendig,Frank – Wartig,Wolfgang, email b4–00–01, 2000.

4.e4 Nf6 5.c3 Nc6 6.bc6 dc6 7.e5 Nh5 8.Qh5 g6 9.Qh4 Bg7 10.Nf3 Bf5 11.Ba3 e6 12.Qd8 Rd8 13.d4 Bc2 14.Nbd2 Rb8 15.Bc4 Bf5 16.0–0 Bh6 17.Bc5 Ra8 18.Ra6 Bc2 19.Nb3 Rb8 20.Na5 Rb1 21.Rb1 Bb1 22.Ra7 Kd7 23.Bd6 Rc8 24.Ba6 Rb8 25.Rc7 Kd8 26.Nc6 Ke8 27.Nb8 f5 28.Bb5 Kd8 29.Bc6 Bd3 30.Rh7 Ba6 31.Rh8 Bf8 32.Rf8 1–0. Trkn – mr.yuck, itsyourturn.com, 2001.

4.e4+– Nf6 5.c3 Ne4 6.cb4 e6+–.

4.e4+– Rb8

5.Ra7?! e5 6.Nf3 Bb7+/–.

5.c3 a5+–.

5.c3 Rb5?? 6.Bb5 (6.cb4?! Rb4 7.Nc3 Nf6+–) 6...e5 (6...a6 7.Be2 Nc6 8.Ba6+–) 7.cb4 Bb4 (7...c6 8.Bc4 Nf6 9.Ra7 Ne4 10.Qe2+–) 8.Ra7 Ba6 (8...Ne7+–) 9.Ra6 Qb8 10.Qa4 Qd8 11.Ra8 Nf6 12.Rd8 Kd8 13.Qa8 Ke7 14.Qh8 Ng8 15.Qg8 Kf6 16.Bc4 Ba3 17.Qf7 Kg5 18.Qg7 Kf4 (18...Kh5 19.Bf7 Kh4 20.Nf3) 19.Ne2 Ke4 20.Qh7 1–0. GuestVTXR – GuestZYCT, freechess.org, 2019.

5.c3 Nd3? 6.Bd3 e5 7.Nf3 Bd6 8.Be2 f6 (8...Nf6 9.d4 Qe7 10.Bg5+–) 9.0–0 Nh6 (9...Bb7 10.Qc2+–) 10.Bc4 (10.d4 Bb7 11.Bh6 gh6+–) 10...Qe7 11.d4 Ng4 (11...Nf7 12.Qd3+–) 12.Nh4 f5 (12...Nh2 13.Nf5 Qf8 14.Qh5 g6 15.Nd6 Qd6 16.Qh2 c6+–) 13.Nf5 Qf6 14.Qg4 Rg8 (14...Bf8+–) 15.Nd6 Qd6 16.Qh5 g6 17.Qh7 Rf8 18.de5 Qc5 19.Qg6 Kd8 20.Bg5 Rf6 21.Qg8 Ke7 22.Bf6 1–0. Taulien,Hans_Juergen – Sommerhaeuser,Burkh, remoteschach.de, 2003.

5.c3 Nd3 6.Bd3 e5 7.Nf3 Nf6 8.Ne5 d6 (8...Bb7 9.Bc4 d5 10.ed5 Bd5+–) 9.Nc6 Qe7 (9...Bg4 10.f3 Bf3 11.Qf3+–) 10.Ne7 Ke7 11.Ra7 Ng4 12.Rc7 Kd8 13.Rc8! Rc8 (13...Rc8 14.Qg4 Remove defender; 13...Kc8 14.Qg4 Remove defender) 14.Qg4 g6 15.Qf4 Be7 16.Qf7 Kd7 17.Ba3 Rcf8 18.Qd5 Rf4 19.b6 Rb8 20.Bb5 Kc8 (20...Kd8 21.Qc6 Re4 22.Kd1 Re1 23.Re1 Rb6 24.Qd7) 21.Qc6 Kd8 22.Qc7 (22.Qd7 1–0. pierre – poza, internet, 2010.

2.a4 e5

3.Bb2 e4 4.ab5 Bb4?? (better is 4...Nf6 5.Ra4 a6) 5.Bg7+– e3 (5...Qg5 6.Bh8 Qb5 7.Nc3+–) 6.fe3 Qh4 7.g3 Qe4 8.Nf3 (8.Bh8?! Qh1 9.Nf3 Bb7+–) 8...Bb7 9.Bg2 Nh6 (9...Qc4 10.Bh8 Qb5 11.c3+–) 10.Bh8 Ng4 (10...Qc4 11.c3 Bd6 12.Na3 Ba3 13.Ra3+–) 11.0–0 (better is 11.c3 Bd6 12.Nh4 Nh2+–) 11...d6 (11...Bd2 12.Qd2 Qe3 13.Kh1 Qd2 14.Nbd2 Ne3+–) 12.Nh4 Ne3 13.Be4 Nd1 14.Bb7 Bd2 15.Nd2 (15...Ne3 16.Ba8 Nf1 17.Kf1+–) 1–0. Dumontelle,Joe – Landriault,R, Aug, 1979.

3.Bb2 Nf6 4.ab5 Bb4 5.Be5 d5 6.e3 Bf5 7.Nf3 Nbd7 8.Bb2 0–0 9.Be2 Bd6 10.0–0 Ng4 11.d3 Ndf6 12.Nbd2 Re8 13.Nb3 Qe7 14.Qd2 Ne4? 15.de4 de4 16.Qd4 f6 17.Qd5 Qe6 18.Qe6 Be6 19.Nfd4 Bh2 20.Kh1 Be5 21.Ne6 Bb2 1–0. Fritz,Harry – Koester, corr DDR, 1965.

3.ab5 a6 4.c3 Bb7 5.d4 ab5 6.Ra8 Ba8 7.de5 d6 8.Nf3 Nd7 9.ed6 Bd6 10.Nd4 Ngf6 11.Nb5 0–0 12.Nd6 cd6 13.Qd6 (13.Qd6 Bd5 14.e3+–) 1–0. orane (2040) – garlicpapper6 (2140), Live Game Caissa's Web, 2004.

3.ab5 d5 4.Ba3 Bd7 5.Nf3 f6 6.e3 e4 7.Nd4 Ne7 (7...f5 8.Qh5 g6 9.Qd1+/–) 8.d3 f5 9.c4 a6 10.Bb2 c6 11.de4 de4 12.Nc3 Ng6 13.c5 cb5 14.Bb5! Qc8 (14...ab5 15.Ra8 Pinning (15.Ra8 Deflection); 14...Bb5 15.Ndb5 Combination) 15.Nd5 Ra7 16.Nb6 Qc7 17.Ne6 (better is 17.Nd7!? Nd7 18.Ba6 Qe5+–) 17...Qb7 18.Bd7 Nd7 19.Qa4 Kf7 (19...Ke7 20.Nc7!! Nf6 21.Nbd5 Kf7 22.Nf6 gf6 23.Qb3 Kg7 24.Ne6 Kh6 25.Bf6 Qd7+–) 20.Nd8 Ke7 21.Nb7 Rb7 22.0–0–0 Nb6 23.Qc6 Rb8 24.cb6 Kf7 (24...Ne5 25.Qc7 Kf6 26.Qe5 Kg6 27.Qe6 Kh5 28.Qf5 g5 29.h4 Rc8 30.Kb1 Rc1 31.Kc1 Bb4 32.hg5) 25.Qd5 Ke8 26.Qd7 1–0. marekt – foxesox, internet, 2012.

3.c3 ba4 4.Ra4 (4.Qa4 Nf6=) 4...Nf6 5.d3 (5.d4 ed4 6.Qd4 Be7=) 5...Bb7 (5...d5 6.Nf3=) 6.e4 (6.Nf3 e4 7.de4 Ne4=) 6...Be7 (6...c5 7.Nf3=) 7.Bg5 (7.Nf3 d5+=) 7...0–0 (7...d5 8.Nf3=) 8.Nf3 d6 (8...d5 9.Ne5 Ne4 10.Bc1= (worse is 10.de4 Bg5 11.Nf3 Re8–/+)) 9.Nbd2 Nbd7 10.Be2 (10.Qa1 a6=) 10...h6 (better is 10...d5=) 11.h4?? (better is 11.Bf6 Bf6 12.0–0=) 11...hg5–+ 12.hg5 Nh7 (12...Ne8 13.g6–+) 13.g6–/+ fg6 (13...Ng5 14.Qa1–/+) 14.d4 (14.Qb3 Kh8 15.Qe6–/+) 14...g5 (14...Nb6 15.Ba6 Bc6 (15...Na4?! 16.Bb7 Qd7 17.Qb3 Kh8 18.Ba8 Ra8 19.de5=) 16.Qb3 Kh8+=) 15.Bc4 White prepares d5 (better is 15.de5 Nb6 16.Qb3 Rf7 17.ed6 cd6 18.Ra5+=) 15...Kh8?? (15...d5 16.ed5 Bd6 17.Ne5 Nhf6 (17...Ne5?! 18.de5 Qe8 19.e6=) 18.Nd7 Qd7–/+) 16.d5?? Nb6 17.Ra1 Nc4 18.Nc4 Qe8 19.Kd2? c6 20.Kc2? cd5 21.ed5 Qg6 22.Kb3 Kg8 23.Qd2 Nf6 24.Ne3 Ne4 25.Qe2 g4 26.Nh4 Bh4 27.Rh4 Rf2 28.Qg4 Nc5 29.bc5= Qg4 30.Rg4+= dc5 31.Rb1?? Bc8–+ 32.Kc4 Bg4 33.Ng4 Rf4 34.Kc5 Rg4 35.Rb2 Rc8 36.Kd6 Rc3 37.Ke5 Rd3 38.d6 Rg2 39.Rg2+= Kf7 40.Rf2 Ke8 41.Rg2 Kf8 42.Rf2 Ke8= 43.Re2 Kd7 44.Rg2 Re3 45.Kd4 Ra3–/+ 46.Kd5 Ra5 47.Kc4? g5 48.Rd2 g4 49.Kb4 Rg5 50.Rd4 g3 51.Rd1 g2 52.Rg1 Kd6 53.Kc4 Ke5 54.Kb5 Kf4 55.Ka6 Rg7 56.Kb5 Kf3 57.Kc4 Kf2 (57...Kf2 58.Ra1 g1Q 59.Rg1 Rg1–+) 0–1. grahamtrue (2110) – kode (2325), net–chess.com, 2008.

3.e3 ba4 4.Ra4 d5 5.Bb2=.

3.ab5 Bb4

4.Bb2 d6 5.c3 Bc5 6.d4 ed4 7.cd4 Bb6 8.e3 Bb7 9.Nf3 Nf6 10.Nbd2 0–0 11.Be2 (11.Bd3 a5+/–) 11...Re8 12.0–0 Nbd7 13.Qb3 Bd5 14.Bc4 Bc4 15.Qc4 d5 16.Qb3 Qb8 (16...Qe7 17.Ne5+/–) 17.Ne5 Ne5 (17...Qb7!?+/–) 18.de5+– Nd7 19.Qd5 Nc5 20.Rfd1 Qd8 21.Qc4 (21.Qc6 Qd3+–) 21...Qd3 22.Bd4 Qc4 23.Nc4 Nb3 24.Rab1 (24.Ra3 Nd4 25.ed4 Rad8+/–) 24...Nd4+/– 25.ed4 (worse is 25.Rd4 Bd4 26.ed4 Red8–+) 25...Red8 (25...f6 26.f4+/–) 26.d5+– Rd7 27.Kf1 Rad8 28.d6 (28.Nb6?! ab6 29.Rdc1 Re7+=) 28...cd6 29.ed6 (29.Nd6?! f6 30.f4 fe5 31.fe5 Rf8 32.Ke1 Rf2=) 29...Bc5 30.Rd5 Rc8 (30...Bd6?? 31.Rbd1+– (31.Rd6?! Rd6 32.Nd6 Rd6+=)) 31.Ra1 Bf2?? (better is 31...f6 32.Ra6 Bb4+–) 32.Ne5 (32.Ne5 Rd6 33.Rd6+–) 1–0. Baumann,Walter (2100) – Bearce,Harold L (1730), ICCF FM/0862, 2009.

4.Bb2 d6 5.c3 Bc5 6.e3 Bb6 7.Qf3 d5 (7...c6 8.bc6 Qc7 9.Qg3=) 8.c4+/– Bb7 (8...f6 9.cd5 Bb7 10.Nc3+/–) 9.Be5 f6 10.Bf4 Nd7 (10...c5!?+–) 11.cd5 Ne7 12.Bc4 Nc5 13.d4 Nd7 (13...Ne6+–) 14.Ne2 0–0 (14...g5 15.Qh5 Ng6+–) 15.d6 Kh8 (15...Nd5 16.Bd5 Bd5 17.Qd5 Kh8 18.0–0+–) 16.de7 Qe7 17.Qb7 Qb4 18.Nd2 Ba5 19.e4 Rfe8 (19...Rab8 20.Qc6 Nb6 21.0–0 Nc4 22.Nc4+–) 20.0–0 Rec8 (20...Reb8 21.Qa6 Bb6 22.Bd5 Bd4 23.Ra4 Bf2 24.Rf2+–) 21.Rfb1 (21...Qd2 22.Bd2 Bd2 23.Ra7+–) 1–0. Taulien,Hans_Juergen – Neffgen,Dieter, remoteschach.de, 2002.

4.Bb2 Bd6 5.Nf3+/– Qe7 6.Na3 Nf6 (6...a6 7.Nc4 f6 8.Nd6 Qd6 9.e3+=) 7.Nc4+/– e4 8.Nd4 Be5? (Better is 8...Bc5 9.Nf5 Qf8+=) 9.Nf5+– (9.Ne5?! Qe5 10.e3 a6+/–) 9...Bb2?? (9...Qb4 10.Ng7 Kf8+–) 10.Ne7 (10.Nb2 Qf8 11.e3 d5=) 10...Ba1 11.Nc8 (11.Qa1?! Ke7 12.Qe5 Kd8+–) 11...Bd4 12.e3 Bc5 13.Qa1 0–0 14.Qe5 Rc8 15.Qc5 a6 (15...a5 16.b6 Nc6 17.b7+–) 16.b6 (Better is 16.Nd6!? Rf8 17.Qc7 ab5+–) 16...Nc6 1–0. Taulien,Hans_Juergen – Fritz,Marco, remoteschach.de, 2002.

4.Bb2 Qe7 5.Nf3 d6 6.c3 Bc5 7.d4 ed4 8.cd4 Bb4 9.Bc3 d5 10.Qb3+/– Bc3 11.Nc3 Be6 12.e3 (12...Nf6 13.Qa3) 1–0. grandmaster goldberg – Zamoht, ChessWorld.net, 2005.

4.Bb2 Qe7 5.Nf3 d6 6.e3 Bb7 7.Ra4+/– Bc5 8.d4 ed4 9.Nd4 c6?? 10.Nf5+– Qg5 11.Re4 Kd7 12.Re5 Kc7 13.Rc5! d5 14.Qd5 Ne7 15.Qd6 (15...Kc8 16.Be5 Na6 17.ba6 Qe3 18.Ne3 Nd5 19.ab7 Kb7 20.Qc6 1–0. pierre_d – sydnios, chessmaniac.com, 2006.

4.Bb2 Qe7 5.Nf3 d6 6.e3 Nf6 7.c3 Bc5 8.d4.

4.Bb2 f6+=.

4.c3 Be7 5.d4 e4 6.Qc2=.

4.Nf3 Qf6 5.Bb2 d6 6.c3 Bc5 7.d4 Bb6 8.de5 de5 9.Qd5 c6 10.Qe5 Qe5 11.Ne5 cb5 12.e3 Bd7 13.Na3 Nf6 14.Nb5 Bb5 15.Bb5 Nbd7? (15...Ke7+–) 16.0–0–0 0–0–0 17.Nf7 Rhe8 18.Ba3 Nc5 (18...a5 19.Nd6 Kc7 20.Ne8 Re8 21.g4+–) 19.Be8 Rd1 (19...Re8 20.Nd6 Kd7 21.Ne8 Ke8 22.f3+–) 20.Rd1 Ne8 (20...Nce4 21.Bb5 Nf2 22.Re1+–) 21.Bc5 Bc7 (21...Bc5 22.Rd8 Kc7 23.Re8+–) 22.Ba7 Kb7 23.Bd4 g6 24.Be5 Be5 25.Ne5 g5 (25...Nf6 26.Rd4+–) 26.Rd7 Kc8 27.Rh7 Nf6 28.Rf7 Ne4 29.Kc2 Nd6 30.Rg7 Ne4 31.f3 (31.f3 Nf6 32.Rg5+–) 1–0. michaelbuss – Slickdaddy, ChessWorld.net, 2008.

4.Ba3 Ba3

5.Na3 a6 6.ba6 Nf6 7.Nc4=.

4.c3 Bc5

5.d4 ed4

6.cd4 Bb6 7.Nf3 (7.e4 Bb7=) 7...Nf6 8.Bg5 h6 9.Bh4 0–0 (9...a5 10.e3+=) 10.e3 Bb7 11.Ne5 (11.Bd3 Qe7+=) 11...d6 (11...g5 12.Bg3+=) 12.Ng4+/– Nbd7 13.Bc4 (13.Bd3+/–) 13...Qe7 (13...c5!? 14.d5 Re8+/–) 14.Nc3+– Bg2? (better is 14...Kh8+–) 15.Rg1 Bb7 16.Nf6 (16.Bd5! Rab8 17.Bb7 Rb7+–) 16...Nf6 17.Rg6 d5 (17...Ba5 18.Ra5 Kh8 19.Bf6 gf6 20.Rh6 Kg7 21.b6+–) 18.Bf6 Qe6 (18...Qf6 19.Rf6 dc4+–) 19.Rg7 Kh8 20.Qd3 (20.Qd3 Qe4 21.Ne4 de4 22.Qf1 c6 23.Rf7 Kg8 24.Qg2 1–0. pierred (2540) – kode (2315), net–chess.com, 2007.

6.cd4 Bd6 7.e4 Qe7 (7...Bb7 8.e5 Qe7 9.Nf3+=) 8.Bd3 (8.e5 a6+=) 8...Nf6 (8...Bb7 9.Qe2+=) 9.e5 0–0? (better is 9...Bb4 10.Nd2 Bb7+=) 10.Qe2+– Re8 (10...Bb7 11.Kf1+–) 11.ef6 Bb4 (11...Qd8 12.Be3 Qf6+–) 12.Kd1 gf6 (12...Qd8 13.Qf3 Qf6 14.Qf6 gf6+–) 13.Qg4 Kf8 14.Bh6 1–0. marekt – Miruska, sachy.sk, 2008.

6.cd4 Be7 7.e4+=.

6.cd4 Qf6 7.Ra4 Bb6 8.e4 Qg6 9.Nc3 Ne7 10.Nf3 0–0 11.Ne5 Qd6 12.Ba3 Qe6 13.Bc4 d5 14.Nd5 Nd5 15.Bd5 Qe8 16.Bf8 Qf8 17.Ba8 Nd7 18.Nd7 Bd7 19.Bc6 Bc6 20.bc6 Qd6 21.Qg4 f6 22.Qd7 Qf4 23.Qe8 1–0. marus2 – Crownsman3, internet, 2001.

3.e3 Bb4

4.ab5 a5 5.c3 (5.Bb2 f6+=) 5...Be7 6.Bb2 (6.d4 ed4 7.cd4 Nf6=) 6...Nf6 7.Na3 (7.c4 d6=) 7...d5 (7...e4 8.d3 d5 9.de4 Ne4 10.Nf3=) 8.Nf3 (8.c4 e4=) 8...e4+= 9.Ne5 Bd6 10.Nc6 (10.c4 0–0=) 10...Nc6–/+ 11.bc6 Bg4 (11...Be5 12.d4 ed3 13.Bd3+=) 12.Qc2 (12.Qa4 0–0+=) 12...0–0 (12...Be5 13.Nb5+=) 13.Bb5 (13.c4 Qe7+=) 13...Qe7 14.c4 Be5 (14...Rfb8 15.Qa4+=) 15.Be5 (15.cd5 Bb2 16.Qb2 Nd5+=) 15...Qe5 16.0–0 (16.Rb1!?+=) 16...Be2–+ 17.Rfe1? (better is 17.Rfc1–+) 17...Ng4 18.g3 Bd3 19.Qc3 Qf5 20.Rf1 Bf1 (20...Bf1 21.Rf1 Rfd8–+) 0–1. Zimmer,Georg – Rosner,Dirk, corr, 1994.

4.Qg4 Bf8 5.ab5 Nf6.

2.a4 e6

3.Na3 e6 4.c3 a5 5.Qb3 ab4 6.cb4 Ra4 7.Nc2 Ra1 8.Na1 f5 9.Nc2 Nf6 10.Nf3 Be7 11.e3 0–0 12.Be2 Bb7 13.0–0 Qb6 14.d4 Qc7 15.Bb2 Kh8 16.Ra1 ½–½. Franck,Mirko – Marquardt,Alexander, Neumuenster, 1997.

3.Bb2 ba4 4.Nf3 Nc6 (4...Bb4?? 5.Bg7 Nf6 6.Bh8+–) 5.c3 Bb7 6.Qa4 Nf6 7.e3 Be7 (7...a5 8.b5 Ne7 9.Be2=) 8.Be2 0–0 9.0–0 a6 10.d4 Ne4 11.Nbd2 f5 12.Qc2 d5 13.Nb3 Bd6 14.Nc5 The pressure on the isolated pawn grows 14...Bc5 15.dc5 Rf6 (15...e5 16.Rfd1+=) 16.Qb3 Rh6 17.c4 a5 18.b5 Nc5 19.Qc3 d4 20.ed4 Ne4 21.Qb3 Nb4 22.Bc1 Rg6 23.Rd1 Nd6 (23...Qc8 24.Bf1+–) 24.Bd2+– Nf7 25.Bb4 (25.Ra4 Be4 26.Bb4 ab4 27.Rb4 Rg4+–) 25...ab4+– 26.Qb4 (26.c5 Ra1 27.Ra1 Be4 28.Qb4 Ng5+–) 26...Ra1 27.Ra1 Ng5 28.Ng5 Qg5 (28...Rg5 29.d5 ed5 30.Bf3+–) 29.g3 f4 (29...Qh4 30.Qd2 f4 31.Bf1+–) 30.Qc5+– fg3 31.Qg5 gh2 32.Kh2 Rg5 33.Ra7 (33.Ra7 Rg2 34.Kh3+–) 1–0. Hase,Pavel (2115) – Yates,Normajean (1945), FICGS, 2008.

3.Bb2 c6 4.g3 (4.Nf3 Nf6+=) 4...a6 (4...Nf6 5.Nf3=) 5.Bg2 Bb7 6.Nh3 d5 7.0–0 Nd7 8.d3 (8.Nf4 Ngf6 9.Nd3 Bd6=) 8...Ngf6= 9.c3 Bd6 10.Nd2 0–0 11.Qb3 (11.Qc2 Qc7=) 11...c5 (11...Qb6 12.a5 Qc7 13.d4=) 12.ab5 ab5 13.Ra8 Ba8 14.bc5 (14.Ra1 Bc6=) 14...Nc5 15.Qb5 Qc7 16.Ra1 Bc6 (16...Rb8 17.Qa5 Qa5 18.Ra5 Rb2 19.Ra8 Bf8 20.Nf3=+) 17.Qa5 Qd7 18.Qa7 Qa7 (18...Rb8!? 19.Qd7 Bd7=) 19.Ra7+= Na4 20.Ra6 (20.Ba1 Be5+=) 20...Rc8= 21.Ba1 Bf8 (21...Nd7!? 22.Nb3 Ndb6=) 22.c4+= Nc5 (22...Be8 23.Bf6 gf6 24.cd5 Rc1 25.Bf1+–) 23.Ra2+– Ng4 (23...Ncd7!?+–) 24.Nf4 g6? (better 24...dc4 25.Bc6 Rc6 26.Nc4 Nb3+–) 25.cd5 ed5 26.Nd5 Bd5 (26...Rd8 27.Nf6 Nf6 28.Bc6+–) 27.Bd5 Nd7 (27...h5 28.Ra7 Ne6 29.Ne4+–) 28.Nc4 Bc5 29.e3 Rb8 (29...Kf8 30.Kg2+–) 30.Ra8 (30.Kg2 Ngf6 31.Bf3 Rc8+–) 30...h5 (30...Ra8 31.Ba8 f5 32.d4+–) 31.Rb8 Nb8 32.h3 Nh6 33.d4 Be7 34.e4 Kh7 35.Ne5 (35.e5 Kg7+–) 35...f6 36.Nc6 (36.Nd3 Na6+–) 36...Nc6 37.Bc6 Nf7 38.f4 Bd6 (38...g5 39.Bc3+–) 39.e5 Bb4 40.d5 fe5 41.fe5 Bc5 (41...Kg8 42.Kg2+–) 42.Kg2 Nd8 (42...Kg8 43.d6+–) 43.Kf3 Kg8 (43...Be7 44.Be8 Nb7 45.Bc3+–) 44.Be8 Kh7 45.Kf4 (45.d6 Nb7 46.d7 Nd8+–) 45...Be7 (45...Bb4 46.d6 Kg7 47.Ke4+–) 46.Ba4 (better 46.d6 Ne6 47.Ke4 Bf8+–) 46...Nf7 47.h4 g5 (47...Bb4 48.Bc2 Bd2 49.Ke4+–) 48.hg5 Bg5 49.Kf5 Kh6 (49...Bd8 50.Ke6 Kg7 51.Be8+–) 50.d6 Nd8 (50...Bd8+–) 51.e6 Nb7 52.Be5 Nc5 (52...h4 53.gh4 Nd6 54.Bd6 Bh4 55.e7 Be7 56.Be7 Kg7 57.Be8 Kh7 58.Kf6 Kh6 59.Bf8 Kh7 60.Kf7 Kh8 61.Bc6 Kh7 62.Be4 Kh8 63.Bg7) 53.e7 (53.e7 Be7 54.de7 Ne6 55.Ke6 Kg5 56.Bd1 Kh6 57.e8Q Kh7 58.Bh5 Kh6 59.Qg6) 1–0. UncleBulgaria (2365) – 321sacrifice419 (1670), ChessWorld.net, 2016.

3.Bb2 Nf6 (--> 2.Bb2 Nf6 3.a4 e6).

3.Nc3 Bb4 4.ab5 Nf6 5.e4 d6 6.Bb2 c6 7.Ra4 a5 8.ba6=.

3.Nc3 d5 4.e4 ba4 5.Qe2 de4 6.Qe4 c6 7.Ra4 Nf6 8.Qh4=.

3.d4 a5 4.e4 Nf6 5.ab5 Ne4.

3.e4 ba4 4.c3 Bb7 5.d3 a5 6.ba5 Bc6 7.Nf3 d6 8.Nbd2=.

3.e4 Bb7 4.ab5 a6 5.c3 Be4 6.ba6 Na6 7.Bb2 c5 8.b5=.

3.Bb2 Bb4??

4.ab5?! Nf6=.

4.Bg7 ba4 5.Bh8+–.

3.ab5 Bb4

4.Ra4 a5 5.c3 Be7 6.e4 Bb7 7.Qf3 Nf6 8.d3 0–0 9.Qg3 d5 10.e5 Ne8 11.d4 c5 12.Nf3 cd4 13.Bd3 dc3 14.Qh3 g6 15.Bh6 Qc7 16.0–0 Ng7 17.Rc1 Nd7 18.Rc3 Qb8 19.Qg3 Nc5 20.Rd4 Nd3 21.Bg7 Kg7 22.Rcd3 Ba6! 23.ba6 Qb1 24.Rd1 Rfb8 25.h3 Qf5 26.Ra4 Rb1 27.Rb1 Qb1 28.Kh2 Ra6 29.Qf4 Qc2 30.Nd4 Qd1 (30...Qa4?! 31.Ne6 Re6 32.Qa4 Re5 33.Qa5=) 31.Nf3 Kg8 32.Ra2 Qb3 33.Ng5 Bg5 34.Qg5 Qb6 (34...Qa2?! 35.Qd8 Kg7 36.Qf6 Kf8 37.Qd8 Kg7 38.Qf6 Kh6 39.Qh4 Kg7 40.Qf6=) 35.Qe7 Ra8 36.Qg5 a4 37.Qd2 Qb1 38.Ra3 Qe4 (39.Qc3 Rb8–+) 0–1. Trkn – guest1091, ICC, 2004.

4.Ra4 c5 5.Bb2 f6 6.e4 d5 7.ed5 e5 8.d6 Nd7 9.c3 Ba5 10.Qb3 Kf8 11.Qa2 Bb6 12.Bc4 Bb7 13.Bd5 Bd5 14.Qd5 Rc8 15.c4 Qe8 16.Ne2 Rd8 17.0–0 f5 18.Qd3 g6 19.Re1 Ngf6 20.Nf4 Kg7 21.Nd5 Qe6 22.Nf6 Qf6 23.f4 Rhe8 24.Qd5 Qe6 25.fe5 Kf8 26.Ra1 h6 27.d3 Kg8 28.Nc3 g5 29.Qe6 Re6 30.Nd5 Rde8 31.h4 f4 32.Nc7 Bc7 33.dc7 Rc8 34.Ra7 Nb6 35.hg5 Kg7 36.d4 Nc4 37.d5 Ree8 38.d6 1–0. Rosner – Wolf,H, ST, 2000.

4.Ra4 Bc5 5.Nf3 (5.d4 Be7+=) 5...d5 (5...a6 6.d4 Be7 7.e4+=) 6.d4 Bd6 (6...Be7 7.e3+=) 7.c4 (7.Ba3 a6+=) 7...Bd7 (7...dc4!? 8.e4 Nd7+=) 8.c5+/– Bb5 (8...Be7!? 9.e3 Nf6+/–) 9.Rb4+– (9.cd6?! Ba4 10.Qa4 Nd7+/–) 9...a6 (9...Bc5 10.dc5 a6 11.Nc3+–) 10.cd6 Qd6 (10...cd6 11.Nc3 Nc6 12.Rb2+–) 11.Ba3 a5?? (better is 11...Qb6+–) 12.Rb5 Qa3 (12...Qd8+–) 13.Na3 a4 14.Rb7 (better is 14.Rb4 Nd7 15.Ra4 Rb8+–) 14...c6 15.Qb1 Nf6 16.Rb8 Rb8 17.Qb8 Ke7 18.Qh8 Ne4 19.Qg7 Kd6 20.Ne5 f6 (20...Ng5 21.Qf8 Kc7 22.Qe7 Kb8 23.Nc6 Kc8 24.e4 Nf3 25.gf3 de4 26.Ba6) 21.Qd7 1–0. marre – gast, internet, 2010.

4.c3 Bc5 5.d4 Bb6 6.Nf3 Bb7 7.Nbd2 c6 (7...Nf6 8.Qc2+=) 8.e4+/– c5 9.Ba3 Ba5 (9...cd4 10.Nc4 (worse is 10.cd4 d5+/–; 10.Nd4?! d5+=) 10...Bc7 11.Qd4+–) 10.Qc2 (better is 10.Bc5 d6 11.Ra5 Qa5 12.Bb4+– (12.Bd6?! Qc3 13.Qb1 Nf6+=)) 10...Qf6? (better is 10...cd4 11.Nd4 d5+/–) 11.Bc5+– Bb6 (11...Bc7 12.Ra7 Ra7 13.Ba7+–) 12.Bb6 ab6 13.Ra8 Ba8 14.Qa4 Bc6 (14...Be4 15.Ne4 Qf4 16.Ned2+–) 15.bc6 dc6 16.Nc4 (16.e5 Qd8+–) 16...Qd8 (16...Qf4 17.Nfe5 (17.Nb6?! Qc1 18.Qd1 Qc3 19.Nd2 Qd4+–) 17...Qe4 18.Be2 Qg2 19.Bf3 Qf3 20.Nf3+–) 17.Qa3 c5 (17...Qe7 18.Nd6 Kf8 19.e5+–) 18.dc5 bc5 19.Qc5 (19.Qc5 Nd7 20.Nd6 Kf8 21.Qa7+–) 1–0. pierre – tomasmargaritis, internet, 2015.

4.c3 Bc5 5.d4 Bd6 6.c4 Ne7?? 7.c5+– c6 8.cd6 Nd5 9.e4 Nb6 10.Nc3 Bb7 11.Nf3 0–0 12.Qb3 h6 13.Bd3 f6 14.0–0 Re8 15.Bd2 Nc8 16.bc6 dc6 17.Qb7 Nd6 18.Qa8 e5 19.de5 fe5 20.Ra7 Qf6 21.Rb1 Nb5 22.Nb5 cb5 23.Bb5 Rc8 24.Bc4 Kh7 25.Rb8 Rc4 26.Rh8 Kg6 27.Qe8 Qf7 28.Qf7 1–0. pereira – MEGADANRIOS, internet, 2011.

4.e3 a5 5.Bb2 Nf6 6.Nf3 Bb7 7.Be2 c6 8.c3 Bc5 9.d4 Bb6 10.c4 cb5 11.cb5 d5 (11...d6 12.Qa4=) 12.Ba3 Bc7 (12...Ne4 13.Qa4+=) 13.0–0 Bd6 (13...Nbd7 14.Nc3+=) 14.Bc5 (14.Nbd2 Bc7+–) 14...Ne4+= 15.Qc2 Nc5 (15...0–0 16.Rc1+=) 16.dc5 Qc8? (better 16...Qc7 17.Rc1 Be7+–) 17.Rc1+– Nd7 (17...Bc7+–) 18.cd6 Qc2 19.Rc2 0–0 20.Rc7 Nb6 (20...Bc8 21.Nd4+–) 21.Rb7 Rac8 (21...Rfb8 22.Re7 Rd8+–) 22.Rb6 Rc7 1–0. DEFFM – GuestHBDP, freechess.org, 2018.

4.e4 Bb7 5.Bb2 Nf6 6.e5 Nd5 7.Qf3 Qc8 8.Qg3.

4.e4 Nf6 5.e5 Nd5 6.Qg4 (6.c3 Be7+=) 6...0–0= 7.c3 Bc5 (7...Be7 8.c4 Nb4 9.Qe4=) 8.d4+= Be7? (better is 8...f5 9.Qg3 Be7+=) 9.Bh6+– (9...g6 10.Bf8 Bf8 11.c4 Bb4 12.Nd2+–) 1–0. Baumann,Heinz – Neffgen,Dieter, RSX9E – A00 – Sokolsky–1, 2002.

4.Ba3 Ba3

5.Ra3 c6 6.e4 Nf6 7.e5 Nd5 8.Nf3 d6 (8...0–0 9.c4 Nb4 10.Nc3+/–) 9.d4 (9.c4 Nb4 10.Nc3+=) 9...cb5 10.Bb5 Bd7 11.c4 (11.Bc4 Nc6+=) 11...Bb5+= 12.cb5 de5 13.Ne5 Qb6 (better is 13...Nd7=) 14.Qb3?? (14.Nc3!? Nc3 15.Rc3+=) 14...0–0 (14...Qd4!? 15.Nc4 Nd7–/+) 15.0–0+= f6 (15...Qd4!? 16.Re1 Rc8=) 16.Nc4+= Qd4 17.Nbd2 (17.Rd1!? Qc5 18.Ne3 Ne3 19.Qe6 Kh8 20.Re3 Qb5 21.Nc3+=) 17...Nd7+= 18.Qh3 (18.Nf3 Qc5+=) 18...Nf4 19.Qg4 (better is 19.Qe3 Nb6 20.Re1 Qe3 21.fe3+=) 19...Rfe8?? (better is 19...Ne5 20.Ne5 fe5–+ (20...Qe5?! 21.Re3 Qf5 22.Qf5 ef5 23.Ra1–/+; 20...Qd2?! 21.Nc6+=)) 20.g3+– e5 21.gf4 ef4 22.Rd1 (22.Rc1!? Ne5 23.Ne5 Qe5 24.Nc4+–) 22...Ne5+/– 23.Ne5 Re5 24.Qf3 Rae8 (24...Rd8 25.Raa1 Rg5 26.Kh1+/–) 25.Raa1 (better is 25.Qb3!? Qd5 26.Nf3 Qb3 27.Rb3+–) 25...Rb5+= 26.Ne4?? (better is 26.Nf1 Qc5 27.Qf4+/–) 26...Qe4–/+ 27.Qe4 Re4 0–1. bhunterd – egcimfar, gameknot.com, 2014.

5.Na3 Nf6 6.e3 a6 7.Qf3 Nd5 8.e4=.

4.c3 Be7

5.e4 Bb7 6.e5=.

5.e4 d6 6.d4+= Nf6 7.Bd3 Bb7 8.Qe2 0–0 (8...c6 9.Nf3=) 9.Nf3+= Nbd7 10.0–0 c6 11.bc6 Bc6 12.c4 e5 (12...Qc7 13.Nc3+=) 13.Nc3+/– ed4 14.Nd4 Bb7 15.Rd1 Nc5 e4 draws heavy fire 16.Bc2 Re8 17.f3 Bf8 (17...a6 18.Nf5 Bc8 19.Ne7 Qe7 20.Bf4+/–) 18.Bg5 h6 19.Be3 a6 20.Nf5 Qc7 21.Qd2 Rad8 22.Qf2 Kh7? 23.Nd6!+– Bd6 24.e5 A double attack 24...g6 25.ed6 (25.ed6 Rd6 26.Bc5+–; 25.Rd6?! Ncd7 26.Rad1 Qc4+–; 25.ef6 Bh2 26.Kh1 Bg3 27.Rd8 Rd8–/+) 1–0. pierred (2540) – kode (2315), net–chess.com, 2007.

5.e4 e5 6.d4+/– d6 (6...d5 7.ed5 e4 8.Qa4+/–) 7.Nf3 Bg4 (7...Nf6 8.Bd3+/–) 8.Bc4 (8.h3 Bh5+–) 8...Nf6 (8...Nd7!?+/–) 9.de5+– de5 10.Qd8 Bd8 11.Ne5 0–0? (better is 11...Be6 12.Nd2 Nbd7 13.Be6 Ne5+–) 12.Ba3 (12.Ng4 Ng4 13.Bd5 c6 14.bc6 Bb6+–) 12...Be6 13.Bf8 Bc4 (13...Kf8 14.Be6 fe6 15.Nd2+–) 14.Nc4 Kf8 15.Nbd2 (15.e5 Nd5+–) 15...Nbd7 16.Ke2 Nc5 17.f3 1–0. pierred (2605) – kode (2325), net–chess.com, 2008.

3.ab5 Nf6

4.Ra4 A) 4...Bb7 5.Bb2 (5.c3 a6 6.ba6 Ra6 7.Ra6 Na6+=; 5.d4 c6 6.c4 cb5 7.cb5 Be7=; 5.Nf3 c6 6.c3 cb5 7.Ra1 a5=) 5...a6 6.ba6 Bc6 7.Ra3 Na6+=; B) 4...Be7 5.Bb2 (5.Nc3 Bb7 6.Bb2 a6 7.ba6 Ra6+=; 5.d3 Bb7 6.e4 a6 7.e5 Nd5+=; 5.Nf3 Bb7 6.d4 c6 7.e3 cb5=) 5...0–0 6.Nc3 d5 7.Nf3 Nbd7+=; C) 4...a6 5.ba6 (5.Nf3 Bb7 6.ba6 Ra6 7.Ra6 Na6+=; 5.c3 Bb7 6.ba6 Ra6 7.Ra6 Na6+=; 5.d4 Bb7 6.ba6 Ra6 7.Ra6 Na6+=) 5...Ra6 6.c3 Ra4 7.Qa4 Be7+=.

4.c3+/– a6 5.Nf3 (5.d4 Be7 6.e4 Ne4 7.Qg4 Nf6+=; 5.d3 d5 6.Bg5 Bd6 7.e3 h6+=; 5.ba6 Ba6 6.d3 d5 7.b5 Bb7+=) 5...Be7 6.d4 0–0 7.Bg5 Bb7+/–.

4.c3+/– Bb7 5.e3 (5.d3 d5 6.Be3 a6 7.ba6 Ra6+=; 5.Nf3 Be7 6.d4 0–0 7.Bg5 Bf3+/–; 5.d4 Be7 6.f3 d5 7.Bg5 a6+/–) 5...Be7 6.Nf3 0–0 7.d4 a6+/–.

4.c3+/– d5

5.Qa4 Bd7 6.Nf3 Bd6 7.d4 0–0+/–.

5.d4 Bd6 6.Bg5 h6 7.Bh4 Nbd7+/–.

5.e3 Bd6 6.d4 0–0 7.Nf3 c6+/–.

5.Nf3 Bd6 6.e3 (6.d4 0–0 7.Bg5 Nbd7+/–) 6...0–0 (6...e5 7.Be2 e4+/–) 7.d4 c6 8.bc6 Nc6 9.Bd3 a6 10.0–0 Qc7 11.Bb2 Re8 12.Nbd2 e5 13.de5 Ne5 14.Ne5 Be5 15.h3 Bb7 16.Ra5 Qe7 17.Nf3 Bc7 18.Ra4 Ne4 19.Qe2 Qd7 (19...a5+/–) 20.Ba6 (20.Rfa1 Bd6+/–) 20...Bc6 (20...Qa4!? 21.Bb7 Rad8+/–) 21.Raa1 Ra6 22.Qa6 (22.Ra6? Bb5 23.Ne5 Be5–+ (23...Re5?! 24.Ra8 Re8 25.Re8 Qe8 26.c4 Bc4 27.Qg4–/+)) 22...Bb5 23.Qa7 Bf1 (23...Qd6 24.Rfd1 Ng5 25.Ne5 Re5 26.f4 Nh3 27.gh3 Qg6 28.Kh2 Qc2 29.Kh1 Qe4 30.Kh2 Qc2 31.Kh1 Qe4 32.Kh2 Qc2=) 24.Kf1 Qb5 25.Kg1 Qe2 26.Qc7 Qb2 27.Ra7 (27.Rf1!? Nc3 28.Qd7+/–) 27...Qf2+= 28.Kh2 Rf8 29.b5 Qe3 30.b6 Nf6 (30...Qc3?? 31.Qc3 Nc3 32.b7+–) 31.Ra6 Ne8 32.Qb8 Qh6 (32...Nf6 33.Qe5 Qh6 34.Qg5 Qg5 35.Ng5+=) 33.Qa8 (33.Ra8!? Qd6 34.Ne5 Qb8 35.Rb8+=) 33...Qf4+= 34.Kh1 Nf6 35.b7 Nd7 36.Rc6 Nb8 37.Rc8 Qd6 38.c4 dc4 39.Nd4 (39.Rc4?! Qd1 40.Ng1 Qd7=) 39...g6 (39...Qd4?? 40.Qb8 Qa1 41.Kh2+–) 40.Nb5 Qd1?? (40...Qe5 41.Qa3 Qe1 42.Kh2 Qe5 43.Qg3 Qg3 44.Kg3 h6+–) 41.Kh2+– Qd7 42.Rb8 (better is 42.Qb8 Qe7+–) 42...Rb8 43.Qb8 Kg7 44.Qc7 (44.Qc7 Qb5 45.b8Q Qb8 46.Qb8+–) 1–0. soltpl (2045) – garcia2102 (2050), gameknot.com, 2015.

5.f4 Qd6 6.e3 Nbd7 7.Nf3 Qb6 8.d4+/–.

3.c3 ba4

4.Nf3 d5 5.Ne5=.

4.Nf3 Nf6 5.Qa4 c5=.

4.Nf3 Nf6 5.Ra4 d5 6.d4 Bd7 (6...Bd6 7.e3=) 7.Ra1 Bd6 8.Bg5 (8.e3 0–0=) 8...h6 9.Bh4 (9.Bf6 Qf6 10.e3 0–0=) 9...Nc6 (9...Bb5 10.Na3 Ba6 11.Bg3=) 10.e3+= a5 11.ba5 (11.Bf6 gf6 12.ba5 Ra5 13.Ra5 Na5=) 11...Ra5 (11...Na5 12.Bd3+=) 12.Ra5 Na5 13.Nbd2 (13.Bd3 c5=) 13...c5 14.c4 (14.Ne5 Nc6 15.Nd7 Qd7+=) 14...cd4=+ 15.Nd4 g5 16.Bg3= Bg3 17.hg3 e5 18.N4f3 e4 19.Ng5+/– Rg8 20.Nh3 Nc4 21.Nc4 dc4+= 22.Bc4 Qa5 23.Kf1 Bb5 24.Bb5 Qb5 25.Kg1 h5 26.Nf4 Ke7 27.Ne2 Rb8= 28.f3 Qd3=+ 29.Kf2 Rb2–/+ 30.Re1 Nd5 31.Qc1?? Rc2–+ 32.Qd1 Nc3 33.Qa1 Ne2 34.Re2?? Qe2 35.Kg1 Qe3 36.Kh2–+ ef3 (37.Qg1 f2–+) 0–1. Fengsrud,Roy – Baerschneider, corr 3GMM–09, 1997.

3.c3 c6

4.ab5+/– cb5 5.Na3 a6 (5...a5!? 6.Nb5 Ba6=) 6.Nb5!+/– Nc6 (6...ab5 7.Ra8) 7.Nf3 a5 (7...Bb7 8.Na3) 8.e4 Ba6 (8...Bb7 9.ba5 Ra5 10.Ra5 Na5 11.d3) 9.ba5+– Na5 (9...Bb5 10.Bb5 Ra5 11.Ra5 Qa5 12.Qe2+–) 10.d4 (10.e5 Bb7+–) 10...Nf6 11.e5 (11.Bg5 Qb6 12.Bf6 gf6+–) 11...Bb5 (11...Ne4 12.Bd3 Bb7 13.Ng5+–) 12.Bb5 (12.ef6?! Bf1 13.fg7 Bg7 14.Rf1 Qc7) 12...Rb8? (better is 12...Nd5 13.Bd2 Rc8+–) 13.Qa4 (13.ef6?! Rb5 14.Qd3 Nb3) 13...Ne4 14.Qa5 Qc8 (14...Qa5 15.Ra5 Nc3 16.Bd3+–) 15.c4 Be7 16.0–0 (16.Nd2 Nd2 17.Qd2 Qc7+–) 16...Bd8 (16...0–0 17.Qa7 Nc3 18.Ba6+–) 17.Qa3 (better is 17.Qe1 Qb7+–) 17...Rb5 (17...f5 18.Qe3+–) 18.cb5 Be7 (18...d5+–) 19.Qa8 Qa8 20.Ra8 Bd8 21.b6 0–0 22.b7 Bc7 23.Ba3 Rb8 24.Rc1 f6 25.Rc7 (25...fe5 26.Rb8 Kf7 27.Ne5 Kf6 28.Bc1 Nd6 29.Rf8 Ke7 30.b8Q Nf7 31.Rf7 Kd6 32.Rfd7) 1–0. Bohnke,H (2005) – Dolezalova,M, OCC–2002–05, 2002.

4.ab5 cb5 5.Na3 Qb6 (5...a5 6.Nb5 Ba6 7.e4 ab4 8.d4+=) 6.e3+– a6 (6...Bb7 7.Nb5 Nf6 8.Nf3+–) 7.Nb5! Bb7 (7...Qb5 8.Bb5) 8.Nd4 Nf6 9.Nb3 Be7 10.Nf3 0–0 11.Be2 Nc6 12.0–0 d6 (12...a5 13.ba5 Na5 14.Na5 Ra5 15.Ra5 Qa5 16.Qc2+=) 13.d4 Rfd8 14.Bd2 e5 15.Ra4 ed4 (15...e4 16.Ne1+–) 16.ed4+– Ne4 17.Be1 (17.Bd3 Nd2 18.Nbd2 d5+–) 17...d5+– 18.Nc5 Nc5 19.bc5 Qc7 20.Bd2 Bf6 (20...Re8 21.Re1+–) 21.h3 (21.Bd3 h6+–) 21...Re8+– 22.Nh2 Re7 (22...Be7 23.Bd3+–) 23.Ng4+– Rae8? (better 23...Bh4+–) 24.Nf6 gf6 25.Bd3 f5 26.Bf5 (26.Ba6?! Ba6 27.Ra6 Re6+–) 26...a5 (26...f6+–) 27.Qg4 Kh8 28.Bf4 Qd8 (28...Ne5 29.Qh4 f6 30.Qf6 Rg7 31.Be5 Re5 32.de5+–) 29.Bg5 Rg8 30.Bf6 Rg7 31.Qg7 1–0. Panza (2745) – retiponziani (1960), ChessWorld.net, 2020.

3.d4 Bb4

2.Bb2 a5

3.a3 Nc6 4.e3 ab4 5.ab4 Ra1 6.Ba1 Nb4 7.Bb5 c6 8.Be2 Qa5 9.Bc3 Nf6 10.Nf3 e6 11.0–0 Be7 12.d4 0–0 13.Bd2 Qa4 14.c4 Qd1 15.Rd1 Ne4 16.Be1 Ba6 17.Nc3 Nc3 18.Bc3 Rb8 (18...d5 19.Ne5+=) 19.Ne5 Bc8 20.c5 f6 21.Nc4 Nd5 22.Be1 Ba6 23.Bf1 Bb5 (23...Bc4 24.Bc4 f5 25.h3+=) 24.Rb1+– Ra8 25.Nb6 Nb6 26.cb6 Bf1 27.Kf1 Rb8 28.b7 Bd6 29.Ba5 Kf7 30.Ke2 Ke8 31.Kd3 e5 32.g3 f5 33.de5 Be5 34.f4 Bd6 35.e4 g6? (better 35...fe4 36.Ke4 g6+–) 36.e5+– Bc5 (36...Ke7 37.Kc4+–) 37.Bc7 Ba7 38.Bb8 (38.Kc4!? Ke7+–) 38...Bb8 39.Kc4 Kd8 40.Rd1 Kc7 41.Rd2 Ba7 42.Re2 (better 42.Rd6!? Bb8+–) 42...Kb7 43.e6 de6 44.Re6 Kc7 (44...Kc8 45.Re7 Bg1 46.Rh7 Kd8+–) 45.Re7 Kb6 46.Rh7 Bb8 47.Rg7 g5 (47...Bd6 48.Rg6 Kc7 49.Rf6+–) 48.Rg5 Bd6 49.Rf5 Be7 50.Rf7 Kc7 (50...Ba3+–) 51.Re7 Kd6 52.Re5 c5 53.Rc5 (53.h4 Kc6 54.h5 Kd7 55.h6 Kd6 56.h7 Kc7 57.h8Q Kd7 58.Qe8 Kc7 59.Re7 Kd6 60.Qd7) 53...Kd7 54.Re5 Kd6 55.h4 (55.h4 Kd7 56.h5 Kd8 57.h6 Kc8 58.h7 Kb7 59.Re7 Kc6 60.h8Q Kb6 61.Qf6 Ka5 62.Ra7) 1–0. BeepBeepImAJeep (2745) – enmQ (2785), lichess.org, 2019.

3.ba5 Ra5 (--> 1.b4 a5 2.ba5 Ra5 3.Bb2 b5).

3.ba5 c5 4.e3 Qa5 5.Nf3 d6 6.Be2 Bb7 7.0–0 Nd7 8.c4 (8.Na3 Bc6=) 8...b4 (8...bc4 9.Bc4 e6 10.d3+=) 9.a3+= Qb6 10.ab4 Ra1 11.Ba1 Qb4 12.Nc3 (12.Bc3 Qb6+=) 12...Nb6 (12...Bf3!? 13.gf3 e6+=) 13.Qc2+– Nf6? (13...Qa5 14.Rb1 Nf6 15.Qb3+–) 14.Rb1 (better 14.Qa2 Bf3 15.gf3+–) 14...Qa5+– 15.Nb5 e6? (15...Bc6 16.Bf6 gf6 17.d4+–) 16.Nc7?? (better 16.Bc3 Qa4 17.Qa4 Na4 18.Bf6 Bf3 19.Bf3 (19.gf3?! gf6 20.Na7 f5+–) 19...gf6 20.Bc6 Ke7 21.Ra1+–) 16...Ke7 (16...Kd7 17.Bc3 Qa7 18.Ra1+–) 17.Bc3 Qa7 18.Nb5 Qb8 19.d3 (19.Qb3 Nfd7+–) 19...Ba8 (19...Nfd7!?+–) 20.e4 g6? (better 20...Ke8+–) 21.e5 de5 (21...Bg7 22.ef6 Bf6 23.Ba5+–) 22.Be5 (22.Ne5?! Bg7+–) 22...Qb7 (22...Qd8 23.Bf6 Kf6 24.Qc3 Ke7 25.Qh8 Bf3 26.Bf3+–) 23.Bf6 Kf6 24.Qc3 Ke7 25.Qh8 h5 (25...Bh6 26.Ra1 Nc8 27.Nh4+–) 26.Qh7 (better 26.Nd6! Qc7 27.Rb6 Bf3 28.Bf3+–) 26...Nd7 27.Ra1 Nf6 (27...Qc6 28.Bf1 e5 29.Nc3+–) 28.Qh8 h4 (28...Qc6 29.Ra7 Bb7+–) 29.Ra7 Qa7 30.Na7 Nh5 31.Nh4 (better 31.Nc8 Ke8 32.Ne5 Nf4+–) 31...Bb7 32.Qe5 1–0. GuestTZTP – GuestGJTP, freechess.org, 2017.

3.ba5 c6 4.e3 Qa5 5.Nf3 Qa3?? (better is 5...d5=) 6.Ba3+– Ra3 (6...Nf6 7.c4 bc4 8.Bc4+–) 7.Na3 b4 8.Nc4 Na6 9.Nb6 Bb7 10.c3 c5 11.Ba6 Ba6 12.Qa4 Bd3 13.Qd7 1–0. Fournier,Frederic – NN, jeu.europe–echecs.com, 2013.

3.ba5 d5 4.e3+= c5? (better 4...c6+=) 5.Bb5+– Nc6?? (better 5...Bd7 6.a4 Ra5+–) 6.Bc6 Bd7 7.Ba8 Qc8 (7...Qa8 8.d4 Qa5 9.Qd2 Qb6+–) 8.Bd5 e6 9.Be4 1–0. GuestWYQQ – GuestWPCF, freechess.org, 2019.

3.ba5 e6 4.e3 Ra5 5.Nf3 Nf6 6.Be2 Be7 7.0–0 0–0 8.Nc3 b4 9.Nb1 c5 10.d4 cd4 11.Qd4 Nc6 12.Qf4 Nd5 13.Qg4 Bf6 14.Nd4 Bb7 15.c4? (better is 15.a3+=) 15...bc3!–+ 16.Nc3 Nd4 17.ed4 Nc3 18.Bc3 Rg5 19.Qf4 Rg2 20.Kh1 Rg4 21.Qf3 Bf3 22.Bf3 Rh4 23.a4 Qc7 24.Rac1 Qh2 0–1. Neumann,Frank – Degterev,Pavel (2225), CP–2011–P–00028, 2011.

3.ba5 Nf6 4.a4 Ra5 5.Nc3=.

3.e3 a4 4.Bb5 c6 5.Be2 d6 6.Nf3 (6.a3+–) 6...c5 (6...e5 7.0–0+–) 7.b5 (7.bc5 dc5 8.Ne5 Nf6+–) 7...Qb6 (7...e5 8.Nc3+–) 8.Na3 (better 8.c4+–) 8...Ba6?? (better 8...e5+–) 9.Nc4 (9.ba6 Qb2 10.Nc4 Qf6+–) 9...Qb7 (9...Qd8 10.ba6 Na6 11.c3+–) 10.ba6 Qb2 1–0. DEFFM – GuestWVNQ, freechess.org, 2018.

3.e3 Ba6 4.ba5 (4.a4 ab4 5.Qf3 c6 6.ab5 Bb7+=) 4...Nc6 (4...e6 5.Nf3=) 5.Nf3 (5.a4 b4+=) 5...Na5 (5...e6 6.a4 b4 7.Bb5=) 6.a4 Nc4 (6...b4 7.Ba6 Ra6 8.e4+=) 7.Bc4 (7.Bd4 Nd6+=) 7...bc4 8.0–0 (8.Nc3 Nf6+=) 8...c3= 9.Nc3 (9.Nc3 Bf1 Discovered attack; 9.Bc3 Bf1 Discovered attack; 9.dc3 Bf1 Discovered attack) 9...Bf1 10.Qf1 Ra5 (10...c6 11.Qd3=) 11.e4 c6 12.d4 White intends e5 (12.Qd3 Nf6=) 12...h6 (12...e6 13.Ne5=) 13.e5 (13.Ba3 Qa8=) 13...e6 (13...Qc7 14.Ba3+=) 14.Ne4 d5 (14...Ra7!?=) 15.ed6+= Bd6 16.Qc4 (16.Ne5 Ra8+=) 16...Ne7 17.Qc3 Bf4 18.g3 (18.g3 Bc7 19.d5 Qd5 20.Qg7 Qe4 21.Qh8 Kd7 22.Qd4 Qd4 23.Nd4+–) 1–0. GuestKKBR – BrandyJ, freechess.org, 2020.

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

3.e3 d6 4.Qf3 e5?? (better 4...c6+=) 5.Qa8+– ab4 (5...Bf5 6.Bb5 c6 7.Bc6 Nc6 8.Qc6 Bd7 9.Qb7+–) 6.Qb8 Nf6 (6...c6 7.a4 ba3 8.Ra3+–) 7.Qb5 Bd7 8.Qb4 d5 (8...Be7+–) 9.Bb5 (better 9.Qb7 Bd6 10.Nf3+–) 9...Bb4–/+ 10.Bd7 Qd7 (10...Nd7!? 11.Ne2 Qg5–/+) 11.Be5= Ne4 12.Nf3 (12.Bg7 Qg4 13.Bh8 Qg2–+) 12...f6 13.Bg3 Ng3 14.hg3 Qb5 15.c3?? (better 15.a4!? Qb6 16.Nd4+=) 15...Bc5?? (better 15...Be7 16.Nd4 Qb2–+) 16.a4?? (better 16.c4 Qb2 17.0–0 Qa1 18.Nc3=+) 16...Qb2–+ 17.0–0 Qa1 18.Na3 (18.c4 dc4 19.Nc3–+) 18...Qa3 19.Nd4 (19.Rb1 Kd7–+) 19...Qa4 (19...Bd4!? 20.cd4 Kd7 21.g4–+) 20.Ne6 Be7 (better 20...Qc4!? 21.d3 Qc3 22.Nc7 Kd7 23.Nd5 Qd3 24.Nf4–+) 21.Nc7 Kd7 22.Nd5 Bd6 (22...Qc2 23.Ra1 Rb8 24.Ra7 Kd6 25.Kh2–+) 23.Nf4?? (better 23.Nb6 Kc6 24.Na4+–) 23...Bf4 24.gf4 h5 (24...Qa2 25.d4–+) 25.Re1 (25.Rb1 Kc6 26.d4 Ra8–+) 25...h4 26.Kh2 1–0. atif_zubair – Morsk, lichess.org, 2019.

3.e4 Bb7 4.f3 ab4 5.Bb5 Nf6 6.d4 g6 (6...c6 7.Bd3=) 7.Ne2 Bg7 8.0–0 0–0 9.c4 (9.a3 c6 10.Bd3 Qb6) 9...bc3 (9...c6 10.Ba4=) 10.Nbc3 c6 11.Ba4 Ba6 12.Rb1 Be2 13.Ne2 Na6 14.Ba3 Ra7 15.Qc2 Re8 16.Bb3 Qa5 17.Bc1 Nb4 18.Bf7 (18.Qd1!?) 18...Kf7= 19.Qb3 Nbd5 20.ed5 Nd5 21.Rb2 Qa4 22.Qd3 Rea8 (22...e5 23.de5 Be5 24.Rd2–/+) 23.f4 (23.Re1 e6=+) 23...Qa3 24.Qd2 Qd6 (24...e6 25.Rf3 Qa5 26.Qd1–/+) 25.f5= Nf6 (25...gf5!? 26.Rf5 Kg8=) 26.fg6 hg6 27.Qc2 Qd5 28.Be3 (28.Rf2 A) < 28...Ra2 29.Nf4 Rb2 30.Qg6 Kf8 31.Nd5 (31.Bb2?! Qf7=; 31.Rb2?? Qd4 32.Rf2 Ra1–+) 31...Rf2 32.Kf2 Nd5 33.Bh6 Ra2 34.Kg3 Bh6 35.Qh6 Kg8 36.Qg6 Kf8 37.Qf5 Ke8 38.Qh5 Kd8 39.Qh8 Kc7 40.Qg7+–; B) 28...Ra3=) 28...Ra3 (< 28...Ra2 29.Nf4 Qa5 30.Bd2) 29.Nf4 (29.Qc1!?=) 29...Qe4=+ 30.Rb3?? (better is 30.Qe4 Ne4 31.Nd5 Bf6 32.Nb6–/+) 30…Qc2–+ (31.Rf2 Qe4–+) 0–1. Mueller,Alfred – Meyer,Juergen, Schleswig Holstein–ch, 1992.

3.a3 a4

4.e3 Bb7 5.Nf3 h6 6.Bb5+– c6 7.Be2 Na6 (7...Nf6 8.c4+–) 8.c4 Nc7 9.b5 (9.Nc3 d6+–) 9...Ne6 (9...cb5 10.cb5 Bd5 11.0–0+–) 10.d4 (10.Nc3 cb5 11.cb5 Ng5+–) 10...cb5 11.cb5 Nf6 12.Nc3 Ng4 (12...Ng5 13.Ng5 hg5 14.0–0+–) 13.h3 (better 13.Na4 Qa5 14.Nc3+–) 13...Ne3?? (13...Nf6+–) 14.fe3 Qc7 15.0–0 g5 (15...Ng5 16.Ng5 hg5 17.Rf2+– (17.Na4 Rh3 18.Rf3 Qh2 19.Kf1 g4 20.gh3 gf3 21.Bf3 Qh3 22.Kf2 Qh2 23.Kf1 Bf3 24.Qf3 Ra4=)) 16.Rc1 Bg7 (16...g4 17.hg4 Rg8 18.d5+–) 17.Nd5! Qd6 (17...Bd5 18.Rc7 Discovered attack) 18.e4 (better 18.Nb4+–) 18...Nf4 (18...Bd5 19.ed5 Qd5+–) 19.Nc7 Kf8 (19...Kd8 20.Na8 Ba8 21.Qc2+–) 20.e5 (20.Na8 Nh3 21.gh3 Qg3 22.Kh1 Kg8+–) 20...Ne2 (20...Be5 21.Na8 Bf6 22.Nc7+–) 21.Qe2 Qg6 22.Na8 f6 (22...Kg8 23.Nc7+–) 23.Rc7 Ba8 24.Rc8 Kf7 25.Qc4 (25.e6 de6 26.Ne5) 25...d5 26.e6! Ke6 27.Rc6! Bc6 28.Qc6 Kf7 29.Qd5 (better 29.Ne5 Kg8 30.Ng6 Kh7 31.Nh8 Bh8+–) 29...e6 30.Qd7 (30.Ne5 Kg8 31.Qe6 Kh7 32.Ng6+–) 30...Kg8 31.Rc1 Kh7 32.Qe6 f5 (32...Rb8 33.Qd7+–) 33.Qd7 (33.Qd7 f4 34.Ne5+–) 1–0. GuestZGFC – Discanto, freechess.org, 2017.

4.e3 c6!?+=.

4.e3 Nc6? 5.Bb5+– e5 6.Bc6 dc6 7.Be5 c5 8.bc5 Qg5 9.Bg3 (better is 9.Nf3!? Qd8+–) 9...Bg4 10.f3 Be6 11.Ne2 (11.Bc7? Qg2 12.d4 Qh1–+) 11...Bc5 12.f4 Qf6 13.d4 Bd6 14.Nd2 Ne7? (14...Qe7 15.c4 Ba3 16.c5+/–) 15.Ne4 (better is 15.e4+–) 15...Qg6+/– 16.Nd6 cd6 17.0–0 Bg4 18.Rb1 0–0 19.h3?? (better is 19.Qd2+/–) 19...Be2–/+ 20.Qe2 Qg3 21.Qg4? (better is 21.Qf2 Qf2 22.Rf2–+) 21...Qe3–+ 22.Rf2 Qd4 23.Qe2 Nf5 24.Kh2 Rae8 25.Qf1 Re3 26.Rd1 (26.Rb4 Qa7 27.Rf3 Qa8–+) 26...Qe4 27.Ra1 Ng3 28.Qd1 Re2 (28...d5 29.Qd2–+) 29.Re2?? (better is 29.Kg3 Rf2 30.Kf2–+) 29...Ne2 (29...Qe2?! 30.Kg3 Qe3 31.Qf3=) 30.g3 (30.Qd6 Nf4 (< 30...Qf4 31.Qf4 Nf4 32.Rb1–+) 31.Rg1 Rc8–+) 30...Qf3 31.Qe1 Re8 32.Rd1 Re3 33.Rd6 h6 (33...Qg3?? 34.Qg3 Re8 35.Qd3+–) 34.c4 (34.Rd8 Kh7 35.Rd2–+) 34...Nf4! 35.Qd2 (35.gf4 Re1) 35...Re2 (36.Qe2 Qe2 37.Kg1 Qg2) 0–1. valpa – dc, HCL–C2295 playchess.de, 2003.

4.e3 e5 5.Be5 d6 6.Bb2 (worse is 6.Bb5 c6 7.Bc6 Nc6+=) 6...Bb7 (6...c6 7.c4 bc4 8.Bc4+/–) 7.Nf3 (7.Bb5 c6 8.Be2 c5+–) 7...Nf6 (7...Qd7 8.Be2+–) 8.Be2 (8.Bb5 c6 9.Be2 Be7+–) 8...Nbd7 (8...c6 9.c4 bc4 10.Bc4+/–) 9.0–0 (9.Bb5 c6 10.Be2 Be7+–) 9...Ng4? (9...c6!?+/–) 10.h3 Bf3 (10...Nge5+–) 11.Bf3 (11.gf3?! Nh6 12.d4 c6+–; 11.hg4?! Be2 12.Qe2 Rb8+/–) 11...Nf2 (11...Nge5 12.Ba8 Qa8+–) 12.Rf2 Qg5 (12...Ra6+–) 13.Ba8 d5 14.Qf3 f6 15.Bd5 Nb6 (15...Bd6 16.Nc3 Bg3 17.Rff1+–) 16.Bc6 Nd7 17.Qe4 Be7 18.Bd7 (better is 18.Qe6 Kf8 19.Qd7 Kf7 20.Bd5 Qd5 21.Qd5 Kg6 22.Qb5 Bd8+–) 18…Kf7 1–0. Valpa – Dc, playchess.de, 2006.

3.a3 ab4

4.ab4 Ra4 5.Ra4+/– ba4 6.c4 c5 7.bc5 Qa5 8.Ba3 e6 9.c6 (9.Nc3!? Bc5 10.Bc5 Qc5 11.Qa4+/–) 9...Ba3 10.cd7 Bd7 11.Na3 Nf6 12.e3 Ke7 13.Nf3 Ne4 (13...Rd8!?+=) 14.Bd3 f5 15.0–0 Qc5 (15...Rc8 16.Be4 fe4 17.Ne1+/–) 16.Qc1 Bc6 17.Nd4 (17.Qb2 Nf6 18.Be2 Nbd7+–) 17...Nd2 18.Nc6 (better is 18.Qb2!? Rg8 19.Rd1+/– (19.Nc6?! Nc6 20.Rd1 Nb3+=)) 18...Nc6= 19.Rd1 Nb3 20.Qb2 Rg8 21.Bc2 Rb8?? (better is 21...Qe5 22.Qb1 Rb8+=) 22.Qg7+– Ke8 23.Nb5 Rb5 24.cb5 Qc2 25.Qd7 Kf8 26.Qc8 Kg7 27.Rd7 Kf6 28.Qh8 Kg5 29.Rg7 Kf6 30.Rh7 Kg5 31.Qg7 1–0. Valpa – Thrustnicely, playchess.de, 2005.

4.ab4 Bb7 5.e3 e5 (5...Ra1 6.Ba1 Na6 7.Bb5 Nb4 8.Nf3=) 6.Be5 Qh4? (6...Nc6 7.Ra8 Qa8 8.Bc7 Nb4 9.Nf3 (9.Bb5?? Bg2 10.c3 Bh1–+) 9...Bf3 10.gf3+=) 7.Bc3?? (better 7.Ra8 Ba8 8.Bc7+–) 7...Ra1= 8.Ba1 Qb4 9.Bc3 Qa4 10.Nf3 Bb4?? (better 10...Nc6=) 11.Bg7+– Bf3 12.gf3 d5 13.Bh8 f6 (13...Nd7 14.Bd3 Ngf6 15.Qc1+–) 14.f4 Nd7 (14...Ke7 15.Rg1 Nh6 16.Qh5 Qc2 17.Qh6 Qb1 18.Ke2+–) 15.Bd3 (better 15.Qh5 Kd8 16.Qd5 Ne7 17.Bf6 c6 18.Qc6 Nf6 19.Qf6 Kd7+–) 15...h6 (15...Kd8 16.Qh5 Ne7 17.Qh7+–) 16.Rg1 (better 16.Qh5 Kd8 17.Qd5+–) 16...Kf7 (16...Ne7+–) 17.Bg6 (better 17.Rg7 Ke8 18.Qh5 Kd8 19.Rg8 Bf8 20.Qd5 Kc8+–) 17...Ke7 18.c3 (better 18.Bf5!? Nf8+–) 18...Qd1 19.Kd1 Ba5 20.Bf5 Nc5 21.Rg8 b4 22.Rg7 Kf8 23.Rg6 (23.cb4!? Bb4 24.Rc7 Ne4+–) 23...bc3 24.dc3 Ke8 25.Bf6 c6 26.Bd4 Nb3 27.Rc6 Nd4 28.ed4 (28.ed4 Ke7 29.Re6 Kf8 30.Rh6+–) 1–0. vaticinator94 (1690) – fishdrzig, gameknot.com, 2018.

4.ab4 Ra1

5.Ba1 Na6 6.c3 c5 7.bc5 Nc5 8.e3 Ba6 9.d4 Ne4 10.Nd2 d5 11.Ne4 e6?? (better is 11...de4 12.Qb3 Qd7+=) 12.Nd2+– Nf6 13.Ngf3 Bd6 14.Be2 0–0 15.0–0 Ng4 16.g3 f5 17.Ne1 Qg5 18.Bg4 (18.Nd3!? Qh5 19.Nf3 Rf6+–) 18...fg4 19.f4 gf3 20.Rf3 Bc8 21.Qe2 Qg4 (21...Bd7+–) 22.Rf8 Kf8 23.Qg4 g6 24.e4 (24.Qh4 Ke8+–) 24...b4 25.ed5 Kf7 26.de6 Be6 27.Qe2 (better is 27.Qf3!? Ke7 28.Qb7 Kd8+–) 27...b3 28.Qb5 Ba3 29.Qb3! Bc1 (29...Bb3 30.Nb3 Combination) 30.Qc2 Bd2 31.Qd2 h5 32.d5 (32.d5 h4 33.Qf4 Ke7 34.Qh4 Kd7 35.Qa4 Ke7 36.Qb4 Kd7 37.Qb7 Kd6 38.Qc6 Ke7 39.Qe6 Kf8 40.d6 g5 41.c4 g4 42.Qf6 Ke8 43.Qe7) 1–0. Valpa – Dc, HCL–C2379 playchess.de, 2003.

5.Ba1 Na6 6.e3 Nb4 7.Bb5 c6 8.Be2 e6 9.Nf3 Bd6?? (better is 9...Nf6+=) 10.Bg7+– f6 11.Bh8 Qe7 12.0–0 Nh6 13.Nd4 (13.c3 Nf7+–) 13...Be5 (13...Qf8 14.c3 Nd5+–) 14.c3 Nd5 15.Bh5 Nf7 (15...Kf8 16.e4 Nf4 17.g3+–) 16.f4 (better is 16.Qc2 Bd4 17.Qh7 Be5+–) 16...Ba6 (16...Bd4 17.ed4 Kf8 18.Bf7 Kf7 19.c4+–) 17.Rf2 (better is 17.fe5 Bf1 18.Qf1 f5+–) 17...Bd6 (17...Bd4 18.cd4 Qf8 19.f5 ef5 20.Qa4+–) 18.Qa4 Nc7 19.Qc2 Kf8 (19...f5 20.Be5 Be5 21.fe5+–) 20.Qh7 Ke8 21.Qg8 Qf8 22.Qf8 Bf8 23.Bf6 Bb5 24.Nb5 cb5 25.d4 Nd5 26.Bh4 Ne3 27.Re2 Nd5 28.f5 Nf4 29.Bf7 Kf7 30.fe6 de6 31.Rf2 Bh6 32.g3 Kg6 33.gf4 Kh5 34.Bg3 Kg4 35.Rb2 Bf8 36.Rb5 Kf3 37.Re5 Bd6 38.Re6 (38.Re6 Bc7 39.f5+–; 38.Nd2 Kg4 39.Rg5 Kh3 40.Ne4 Bf4 41.Nf2) 1–0. Valpa – Idris, playchess.de, 2004.

5.Ba1 Na6 6.e3 c6 7.c4 (7.c3!?=) 7...bc4=+ 8.Qa4 e6 9.Bc4 Bb4?? (9...Qg5 10.Ne2 Nb4–/+ (10...Qg2? 11.Rg1 Qh2 12.Ba6 Ba6 13.Qa6+–)) 10.Bg7 (better 10.Ba6 Qh4 11.Bd4 (11.Bc8 Bd2 12.Nd2 Qa4 13.Bg7 Qg4 14.Bh8 Qg2–/+) 11...Ba6 12.Qb4+–) 10...Qb6?? (better 10...Qg5 11.Bh8 Qg2 12.Ba6 Qh1+–) 11.Bh8 Bd2 (11...d5 12.Be2 Nc5+–) 12.Nd2 d5 13.Be2 Nc5 (13...h6 14.Qg4 Ne7 15.Qg7+–) 14.Qg4 (better 14.Qc2 Ne4 15.Ne4 de4 16.Qe4 Qa5 17.Kf1 Ne7+–) 14...Kf8 (14...Ne7 15.Qh5 Ba6 16.Qh7 Ng6+–) 15.Qg7 Ke7 16.Qg8 Ne4 17.Ngf3 (better 17.Qc8 Nd2 18.Kd2 Qa5 19.Bc3 Qa2 20.Ke1 Qb1 21.Bd1 f5 22.Qc7 Ke8+–) 17...Ba6 18.Bd4 (better 18.Ne5 Be2 19.Qf7 Kd6+–) 18...Qb4 19.Ba6 (19.Ba6 Qa5 20.0–0+–) 1–0. GuestJRCJ – GuestMCCB, freechess.org, 2018.

5.Ba1 Bb7 6.e3 c6 7.c4 (7.Bd4=) 7...e5 (7...bc4!? 8.Bc4 c5=) 8.cb5 (8.Be5 bc4 9.Bc4 Na6+=) 8...Bb4 (better 8...cb5 9.Be5 Nc6+=) 9.bc6 (9.Be5 Bf8+–) 9...Bc6 (better 9...Nc6 10.f4 ef4 11.ef4 Qe7 12.Qe2 f6=+) 10.Be5+– f6 11.Bd4 Na6?? (11...Bd5 12.Nc3 Be6 13.Qh5 g6 14.Qb5+–) 12.Qh5 (better 12.Qg4 Qe7 13.Ba6+–) 12...g6+– 13.Qd1 Qa5 14.Nc3 (14.Nf3 Nc5+–) 14...Bc3 (14...Nc5 15.Qc2+–) 15.Bc3+– Qb6 16.Nf3 Bf3 17.gf3 (17.Qf3 Qb1 18.Qd1 Qd1 19.Kd1 Nc7+–) 17...Nc5 18.Bc4 Ne7 19.Bf6?? (better 19.Qa1+–) 19...Qf6–+ 20.Qb1 (20.d4 Ne6–+) 20...Kf8 (20...d5 21.Be2–+) 21.Qb5 d6 22.Ke2 Kg7 23.d4 Ne6 (23...Rf8 24.f4 Ne4 25.Qb7–+) 24.Qd7–/+ Ng5 25.f4 Ne4 26.Rc1 Rf8?? (better 26...Rc8 27.Rc2 d5–/+) 27.Bd5+– Ng5?? (better 27...Rd8! 28.Qa7 Nf2 29.Kf2 Kh8+=) 28.Rc7+– (28.fg5?! Qf2 29.Kd3 Qf5 30.Qf5 Rf5+– (30...Nf5? 31.Rc7 Kh8 32.Rd7+–)) 28...Kh6 (28...Nf7 29.Qe7 Qe7 30.Re7+–) 29.Qe7 (29.fg5 Qg5 30.Qe7 Qg4 31.Kd2 Rf2 32.Kc3 Kh5 33.Qh7 Kg5 34.Qe7 Rf6+–) 29...Nh3 1–0. GuestNRWH – GuestYTMH, freechess.org, 2017.

5.Ba1 c6 6.e3 Qa5 7.Bb2 Qa2 (7...cb5 8.Nf3=) 8.Qc1 (8.Bd4 d6 9.bc6 e5=) 8...cb5 9.Nf3 Ba6 (9...Bb7 10.Bb5 Bf3 11.gf3=) 10.Be2 b3 (10...Qd5 11.d3=) 11.cb3 (11.Nc3 Qa5 12.cb3 b4+=) 11...Qb3 (11...Nc6 12.Nc3 Qb3 13.0–0+=) 12.Nd4 The isolani on b5 becomes a target 12...Qd5 13.0–0 e6 (13...Qb7 14.Nb5 Bb5 15.Bb5+–) 14.Nb5!+– Bb5 15.Qc8 (15.Nc3 Qb7 16.Nb5 f6+–) 15...Ke7+= 16.Ba3 d6 17.Nc3 (better 17.Bb5 Qb5 18.Bd6 Kf6 19.Qf8+– (worse 19.Bf8 Nc6+–; 19.Qb8?! Qb8 20.Bb8 Bb4+–; 19.Bb8?! Ne7 20.Qc3 Kg6 21.Qc2 f5+–)) 17...Qd2?? (17...Qc6 18.Qb8 Be2 19.Ne2 Nh6+–) 18.Bb5+– Kf6 (18...Qc2 19.Qc7 Kf6 20.Nd5 ed5 21.Qc2 Ne7+–) 19.Ne4 (19.Ne4 Kg6 20.Nd2+–; 19.Qb8?! Qc3 20.Bd6 Bd6 21.Qd6 g6+–) 1–0. DEFFM – GuestZPMF, freechess.org, 2018.

5.Ba1 Nc6 6.e3 Nb4 7.Bb5 c6 8.Ba4 (8.Be2 d6=) 8...Nf6 9.c4 (9.Nf3 d6=) 9...g6 (9...d5!?=+) 10.Qb3 (10.d4 h6=) 10...c5 (10...e6 11.Nf3) 11.d4 (11.Bf6 ef6 12.Ne2 Bb7) 11...Bb7= 12.Nf3 Bf3 13.gf3 Qc7 14.dc5 Qc5 15.Bd4 Qa5 16.Bc3 Nd3? (better is 16...e5 17.Bb5 Nd3 18.Ke2 Nc5 19.Ba5 Nb3) 17.Ke2 Nc5 (17...Qc7 18.Kd3 Bg7 19.c5+–) 18.Ba5 Nb3 19.Bb3 Bg7 20.Nd2 0–0 (20...d6 21.Ba4 Kf8 22.Rb1+–) 21.Rb1 Nh5 22.Bc2 Ra8 23.Bc7 Ra2 24.Rb8 Bf8 25.Bb1 Ra3 26.Be5 Ng7 27.Bb2 Ra7 28.Ne4 Ne6 29.f4 f5 30.Ng5 Ng5 31.fg5 Kf7 32.c5 e6 33.Bd4 Ra5 34.Rc8 e5 35.Be5 Bc5 36.Rh8 Rb5 37.Rh7 Ke8 38.Bd3 Ra5 39.Bf6 Ra2 40.Kf3 Ba3 41.Bc4 Rc2 42.Rh8 Bf8+– 43.Bb3 Rc6 44.Bg7 Kd8 45.Bf8 Kc7 46.Bb4 1–0. Fredek (2090) – Guest, Freundschaftspartie, 5m + 0s, 2005.

5.Ba1 e6 6.e3 Bb4 7.Bg7 Bb7 8.Bh8 Qg5 (8...Nf6 9.Nf3 c6 10.c3+–) 9.Nf3 Qg6 10.g3 (10.Bb5 Ne7 11.0–0 Bd6+–) 10...Qg4 (10...Bf3 11.Qf3 Qc2 12.Qa8 Qb1 13.Ke2+–) 11.Bg2 f5 (11...Ne7 12.h3 Qg8 13.Bb2+–) 12.Bc3 (12.Nc3 Bc3 13.Bc3 Ne7+–) 12...Be7 13.0–0 (13.h3 Qh5+–) 13...h5 (13...b4 14.Bb2+–) 14.Ne5 (better 14.h3 Bf3 15.Qf3 Qf3 16.Bf3+–) 14...Qg5 (14...Qd1 15.Rd1 Bg2 16.Kg2 b4+–) 15.Bb7 h4 16.Nf3 (16.Ba5 Bd6 17.Nf3 Qh6+–) 16...Qg6 17.Ne5 Qh6?? (17...Qg5 18.Ba5 Bd6+–) 18.Bg2 (18.e4 b4 19.Bd4 c5+–) 18...hg3 19.fg3 Nf6 20.Nf3 (20.Bb2 Bd6 21.Bf3 c6+–) 20...Ng4 21.h3 Nf6 22.Bf6 (22.Be5 d6 23.Bf4 Qg6+–) 22...Bf6 23.c3 Qg6 24.Qe1 Nc6 25.Na3 b4 26.cb4 Nb4 27.Nc4 Nd3 (27...Nc6 28.d4+–) 28.Qe2 (28.Qb1 Nc5 29.Qb8 Bd8+–) 28...f4 (28...Nc5 29.Nfe5 Qg5 30.Ra1+–) 29.ef4 Nc5 (29...Be7 30.Ng5! d5 31.Bf3+–) 30.Nce5 (30.Nfe5 Qh6+–) 30...Qg3 (30...Qg7 31.Rc1 d6 32.Rc5 dc5 33.Qb5 c6 34.Qb8 Ke7 35.Nc6 Kf7 36.Nfe5 Be5 37.Ne5 Qe5 38.fe5 Kg7 39.Qc7 Kf8 40.Be4 Kg8 41.Qh7 Kf8 42.Bg6 c4 43.Qf7) 31.Qf2 (31.Qb5 Bd8+–) 31...Qf4 (31...Qf2 32.Kf2 d6 33.Ng4+–) 32.Qc5 Be7 33.Qc7 (33.Qc7 Kf8 34.Ng6 Kg7 35.Nf4 e5 36.Qe5 Kh7 37.Qe7 Kg8 38.Rc1 d5 39.Rc8) 1–0. AhmedSultanov (1730) – EduardP4, lichess.org, 2019.

5.Ba1 e6 6.e3 c6 7.Nf3 Bb7 (7...Bb4?? 8.Bg7 Nf6 9.Bh8+–) 8.Be2 Na6 (8...Bb4?? 9.Bg7 Nf6 10.Bh8+–) 9.c3 Qa8 10.Bb2 Nc7 11.0–0 c5 (better is 11...Qa4!?=) 12.bc5+/– Bc5 13.c4 bc4?? (better is 13...Nf6 14.cb5 Bf3 15.Bf3 Qa5+/–) 14.Bg7+– (14.Bc4?! Bf3 15.Qf3 Qf3 16.gf3 Nf6=) 14...h6 15.Bh8 f6 (15...Ne7 16.Bc4 Bf3 17.Qf3 Qf3 18.gf3+–) 16.Bc4 (16.Qc2 Be4 17.Qc4 Qd5+–) 16...d5 (16...Bf3 17.gf3 d5 18.Be2+–) 17.Be2 Kf7 (17...Ba6+–) 18.Qc2 Ke7 (18...Ne7 19.Qc5 Ba6 20.Ne5 fe5 21.Bh5 Kg8 22.Qe7 Qf8 23.Qc7 Kh8+–) 19.Qc5 Kd7 20.Rc1 Bc6 21.Bf6! Nf6 22.Ne5 Kc8 23.Nc6 Ng8 24.Ne7 Ne7 (24...Kd8 25.Qc7 Ke8 26.Bh5 Kf8 27.Ng6 Ke8 28.Ne5 Kf8 29.Qf7) 25.Qc7 1–0. Valpa – Footyhead, playchess.de, 2005.

5.Ba1 e6 6.e3 f6 7.c3 (7.Qh5 g6 8.Qb5+/–) 7...c5 (better is 7...c6!?=) 8.bc5+/– Bc5?? (8...Bb7 9.d4+/– (9.Bb5?? Bg2 10.Qg4 Bh1–+)) 9.Bb5 (better is 9.Qh5 g6 10.Qc5 Bb7+–) 9...Qa5? (better is 9...Bb7 10.Nf3 Qa5+/–) 10.Be2?? (better is 10.Qh5 Kd8 11.Qc5 Qa1 12.Qf8 Kc7 13.Bd3+–) 10...Qa1–+ 11.Nf3 Ba6 12.0–0 Be2 13.Qe2 Ne7 14.Qb5 Ba7 15.Qb4 (15.d4 Qa6 16.c4 Qb5 17.cb5 d5–+) 15...Nec6 (15...Nbc6 16.Qe4–+) 16.Qd6 (16.Qe4 0–0–+) 16...Qa6 17.Na3 Ne5 18.Qa6 Na6 19.Nd4? Bd4–+ 20.cd4 Ng4 21.h3 Nh6 22.Ra1 0–0 23.Nc4 Nb4 24.Ra7 d5 25.Nd6 Nc6 26.Ra6 Ne7 27.Ra7 Nef5 28.Nb5 e5 29.de5–/+ fe5 30.Nc3 d4–+ 31.Nd5 de3 32.de3 Rd8 33.Ne7 Ne7 34.Re7 Rd1 35.Kh2 Rf1 36.f3–/+ Nf5 37.Re5 g6 38.e4 Ng7 39.Re7+= Nh5 40.e5 Rf2 41.e6 Nf4?? 42.Kg3+– Rg2 43.Kf4 Kf8 44.Rh7 Re2 45.Rf7 Ke8 46.Rf6 Rh2? 47.Kg3 Re2 48.Rg6 Ke7 49.h4 Re6 50.Re6 Ke6 51.Kg4 Kf6 52.h5 Kg7 53.Kg5 (53.Kg5+–) 1–0. Fournier,Frederic (1965) – sebas77, Owl21.com, 2009.

5.Ba1 Nf6 6.g4 h6 (6...Bb7 7.f3–/+) 7.g5 (better 7.e4!?=+) 7...hg5–/+ 8.Nf3 (8.Bg2 e6–/+) 8...g4–+ 9.Nd4 Nc6 (9...Bb7 10.Rg1–+) 10.Nb5 Nb4 11.c3 (11.Bg2 c6 12.Na7 Ba6 13.Bf6 ef6–+) 11...Ba6 (11...Bb7 12.Rg1 Nc6 13.c4–+) 12.Qa4? (better 12.cb4!? Bb5 13.Bg2–/+) 12...Bb5–+ 13.Qb5 Nc6 (better 13...Nc2 14.Kd1 Na1–+) 14.Bg2–/+ e6 (14...Rh5 15.Qb3–/+) 15.d4 (15.Bc6!? dc6 16.Qc6 Ke7 17.c4=+) 15...Nd5! 16.Nd2 (16.Bd5 Qg5 Decoy) 16...Bd6 (16...Qa8 17.Bb2 Nf4 18.Bc6 dc6 19.Qe5–/+) 17.e4 (17.Bd5!? ed5 18.Qd5=+) 17...Nf4–/+ 18.Bf1 0–0 (better 18...Be7–/+) 19.d5? (19.Qa4!?–/+) 19...Ne5 (19...ed5!? 20.ed5 Qa8 21.dc6 Qa1 22.Nb1–+) 20.c4 Nfd3 (20...c6!? 21.Qb3–+) 21.Bd3–/+ Nd3 22.Ke2 Nf4 23.Ke1? (23.Kd1 Qa8 24.Bc3 Rb8–+) 23...Ng2?? (better 23...Qa8 24.Qb1 ed5–+) 24.Kf1–/+ Nf4 (24...Nh4–/+) 25.Qb2 (25.Ke1 Qa8 26.Qb1 ed5 27.Bd4 de4 28.Rg1–+) 25...Qh4?? (better 25...Qg5–+) 26.Qg7 1–0. Agiant – dirtyjoe12, lichess.org, 2019.

3.a4 ab4

4.ab5 Ra1 5.Ba1 c5 6.e3 Bb7 7.Nf3 d5 8.c4 White launches an attack 8...e6 9.d4 dc4 10.Bc4 Bd5 11.Qb3 Qa5 (11...Bf3 12.gf3 Nd7 13.d5=) 12.Bd5+= Qa1 13.Be6 (13.Bc4 cd4 14.ed4 Bd6+–) 13...fe6 14.Qe6 Be7 15.0–0 Qa7 (better 15...Nd7 16.Qc6 Bf6 17.dc5 Ne7+–) 16.Ne5 Nh6 17.Rc1 Kd8 18.dc5 Qc7 (18...Ke8 19.Qc8 Bd8+–) 19.b6 Qc8 (19...Qb7 20.c6 Qb6 21.c7 Qc7 22.Rc7 Kc7 23.Qe7 Kc8+–) 20.Rd1 Nd7 (20...Bd6 21.Rd6 Qd7 22.Rd7 Nd7 23.Qd7) 21.Rd7 (21.Rd7 Qd7 22.Qd7) 1–0. DEFFM – unclegogo, freechess.org, 2020.

4.ab5 Ra1 5.Ba1 c6 6.bc6 Nc6 7.d4 Qa5 8.Nd2 Ba6 9.Ngf3 d6 10.e4 Bf1 11.Rf1 e6 12.Nb3 Qh5 13.Qe2 Nf6 14.d5 Ne5 15.Be5 de5 16.Qb5 Nd7 17.Qc6 Be7 18.d6 Bd8 19.Nc5 0–0 20.Nd7 f5 21.Nf8 1–0. Bonetti,Shane – knightglen, ICC, 2002.

4.ab5 Ra1 5.Ba1 e5 6.Be5 Bb7 7.e3 d6 (7...Nf6 8.Nf3+–) 8.Bb2 h5 (8...Nf6 9.Nf3+–) 9.Nf3+– Nf6 10.Be2 Nbd7 11.0–0 Nb6 (11...Qa8 12.Bf6 Nf6 13.c3+–) 12.c3 (12.Bd4 Nbd7+–) 12...bc3 (12...d5 13.cb4 Bb4 14.Qc2+–) 13.Nc3 g6 (13...d5 14.Qc2+–) 14.Nd4 (14.Qc2 Bg7+–) 14...Qa8 (14...Bg7 15.Qc2+–) 15.Qc2 Bg2? (15...Bg7 16.Ra1 Qd8+–) 16.Ra1 Qb7 17.Nc6 Bc6 (17...Bd5 18.Nd5 Nbd5 19.Ra7+–) 18.bc6 Qc8 19.Ne4 Be7 20.Bf6 (20.Nf6 Bf6 21.Bf6 0–0+–) 20...Bf6 21.Nf6 Ke7 22.Qb2 Qe6 (22...Qf5 23.Nd7 Qg5 24.Kf1 Nd7 25.Qh8+– (worse 25.cd7 Rd8+–)) 23.Ra7 (23.Nd7 Nd7 24.Qh8 Qf6 25.Qf6 Nf6+– (25...Kf6 26.cd7 Ke7 27.Bb5 f6 28.Ra8 Ke6 29.d8Q Ke5 30.Qe8 Kd5 31.e4 Kc5 32.Qc6 Kd4 33.Qd5)) 23...Na8 (23...Rc8 24.Qb6 Kf6 25.Rc7 Ra8 26.Qb2 Qe5 27.Rf7 Kf7 28.Qb7 Qe7 29.Bc4 d5 30.Bd5 Kf6 31.Qa8 Qd6+–) 24.Nd5! Qd5 25.Qh8 Nb6 (25...Qg5 26.Kf1 Qd5+–) 26.Rc7 Ke6 27.Qe8 (27.Qd8 Qf5 28.Rb7 Qb1 29.Kg2 Qf5 30.Bc4 Qd5 31.Bd5 Nd5 32.Qe8 Kf5 33.Qf7 Nf6 34.Rb5 d5 35.Rd5 Kg4 36.Qg6 Kh4 37.Qg5) 27...Kf6 28.Qh8 Kf5?? (28...Ke6 29.Qd8 Qf5 30.Qe8 Kd5+–) 29.Re7+– Qc6 30.Rf7 Kg5 31.Qf6 Kh6 32.Qf4 g5 33.Qf6 1–0. GuestZQWN – BrandyJ, freechess.org, 2020.

3.ba5 Nc6

4.a6 f6 5.e3 e5 (better 5...Ba6!? 6.Bd3 Nh6=) 6.Bb5+– Bc5 (6...Ba6 7.Bc6 dc6 8.Nc3+–) 7.Ne2 (7.Bc6 dc6 8.d4 Bb4 9.Bc3 Qe7+–) 7...Nge7 8.0–0 0–0 9.a4 Kh8 10.d4 Ba6?? (better 10...Bb6+–) 11.dc5+– Bb5 (11...Na5 12.Nbc3 Nc4 13.Rb1+–) 12.ab5 Ra1 13.Ba1 (13.bc6?! Ra7 14.Qd7 Qd7 15.cd7 Rd8+–) 13...Nb8 14.c4 d6 (14...Nc8 15.f4 d6 16.cd6 cd6 17.Bb2+–) 15.cd6 cd6 16.Nbc3 Nd7 (16...Nc8 17.Qd3+–) 17.Qd6 (17.Qd6 Nc8 18.Qb4+–) 1–0. BeepBeepImAJeep (2555) – Ereez (1880), lichess.org, 2018.

4.e3 Ra5 5.Nf3 Bb7 6.Be2 (6.Na3 Na7=) 6...Qa8 (6...e5 7.0–0=) 7.Nc3+= b4 (7...Ba6 8.Nd5 Qb7 9.Bc3+=) 8.Nb5 Kd8 (8...Qd8 9.a3+=) 9.a3 Ba6? (better 9...ba3 10.Ra3 Ra3 11.Ba3 Qa4+=) 10.ab4+– Ra1 11.Qa1 (11.Ba1?! Nb4 12.0–0 e6+–) 11...Nb4 12.Qa4 Nc6 13.Nc7! Kc7 (13...Qb7 14.Nb5+– (14.Ba6?! Qb2 15.Nd5 Nf6 16.Nf6 gf6+–)) 14.Ba6 Nf6 (14...Kd8 15.Qb5 Qb8 16.Bb7+–) 15.0–0 (15.Ng5 Qe8 16.Bb5 e5 17.Bc6 dc6 18.Nf7 Rg8 19.Qa7 Kc8 20.Be5 Qe7 21.Nd6 Qd6 22.Bd6 Bd6+–) 15...g6 (15...Kd8 16.Ng5 Ke8 17.Nf7+–) 16.Qf4 d6 17.Ra1 (17.Bf6 ef6 18.Qf6 Be7+–) 17...Bg7 18.Qc4 (18.Bb5 Qb7 19.Qc4 Rb8 20.Bf6 Bf6+–) 18...Rb8 19.Bc3 (19.Bb5!? Qb7 20.Bf6 Bf6+–) 19...d5 20.Qf4 (20.Qd3 Rb6+–) 20...Kd7 (20...Kd8 21.Qa4 Rb6 22.Ng5+–) 21.Bf1 Qb7 22.Qa4 Kd6 23.e4! d4?? (23...de4 24.Ng5 Double attack (24.Ng5 Decoy); 23...Ne4 24.Bg7 Pinning (24.Bg7 Deflection)) 24.e5! Ne5 (24...Kc7 25.ef6 Bf6 26.Nd4 Bd4 27.Bd4 Qb4 28.Qb4 Rb4+–) 25.Qd4 Nd5 26.Ne5 e6 (26...Ke6 27.Re1 Be5 28.Qe5 Kd7+–) 27.Nc4 Ke7 28.Qc5 Ke8 29.Nd6 Kd7 30.Nb7 Rb7 (30...Nc7 31.Qd6 Kc8 32.Nc5 Rb2 33.Qd7 Kb8 34.Qd8) 31.Bb5 Rb5 32.Qb5 (32.Ra7 Kd8 33.Qd6 Kc8 34.Qc6 Kd8 35.Qd7) 32...Ke7 (32...Kd6 33.Ra6 Ke7 34.Ra7 Nc7 35.Rc7 Kd6 36.Qc6) 1–0. DEFFM – GuestHTFG, freechess.org, 2018.

3.c3 ab4

4.cb4 d6 5.g3 (5.Nc3 c6=) 5...Be6 (5...e5 6.Nc3 Bb7 7.e4=) 6.a4 (6.Nc3 Nf6=) 6...ba4 7.Ra4 Na6?? (7...Ra4 8.Qa4 Bd7 9.b5=) 8.Bc3?? (better is 8.e4 Bc8 9.Bb5 Bd7 10.Qe2+– (10.Ra6?! Bb5 11.Ra8 Qa8=; 10.Ba6?! Ba4 11.Qa4 Qd7 12.Qd7 Kd7+–)) 8...c5 9.e3 cb4 (9...Nb4 10.Bb4 Bd7 11.Ra8 Qa8 12.Nf3 cb4 13.Bg2–/+) 10.Bb5 (10.Ba6!? bc3 11.Bb5 Bd7 12.Bd7 Kd7 13.Nc3+=) 10...Bd7= 11.Ba6? (11.Bd7 Qd7 12.Bb4–+) 11...Ra6 (11...bc3?! 12.Nc3 e5 13.Bb5 Bb5 14.Nb5=) 12.Ra6 bc3 13.Nc3 Qc8 (13...Nf6 14.Nf3+–) 14.Qa1 (14.Ra7 Qb8 15.Ra6 Qb7+=) 14...Bc6 15.e4 f6 (15...Nf6 16.f3+/–) 16.Nf3 d5? (16...e6 17.Nd4 Bb7 18.Ra7+–) 17.d3 (17.ed5!? Bd7+–) 17...de4 18.de4 (18.Nd4 Bb7 19.Qa4 Kf7 20.Qb3 Kg6+–) 18...Kd8 (18...e5 19.Nd5 Ne7+–) 19.Qa5 Ke8 20.Nd4 Be4 (20...Bb7 21.Qh5 g6 22.Qb5 Kf7 23.Qb3 Kg7 24.Ne6 Kh6+–) 21.Qb5 (better is 21.Qa4 Kf7 22.Ne4 Qc1 23.Ke2 Qh1 24.Qc6+–) 21...Kf7= 22.Nc6?? (22.Qb3 Kg6 23.Ne4 Qa6=) 22...Bh1 23.Qb8?? (23.Qc4 Ke8 24.Qa4–+) 23...Qe6 (better is 23...Qa6 24.Nd8 Kg6 25.Qb3 Qa1 26.Kd2–+) 24.Kd2 (24.Ne2 Bc6 25.Qc7 Qe4 26.Qc6 Qc6 27.Rc6 e5–+) 24...Qd7 25.Kc2 (25.Ke1 Bc6 26.Qb6 Bf3–+) 25…Bc6 (26.Qb6 Bg2–+) 0–1. garyp – coral, Live Game Caissa's Web, 2004.

4.cb4 Nf6 5.Nc3 d5 (5...e6 6.a3+=) 6.d4 (6.Nf3 e6 7.Qb3 c6=) 6...c6= 7.e3 Bf5 8.Nf3 e6 9.Be2 (9.a4!?=) 9...Bb4=+ 10.0–0 Bd6 11.Bd3 (11.Ne5!?=+) 11...Bd3 12.Qd3 0–0 13.Rfc1 (13.e4 b4 14.Nd5 cd5–/+) 13...Nbd7–+ 14.Nd2 (14.e4 Bf4 15.e5 Bc1 16.Bc1 Ne8–+) 14...b4 (14...Nb6 15.Qc2–+) 15.Ne2 c5 16.dc5 Nc5 17.Qb1 Nfe4 18.Ne4 Ne4 19.Qd3 Bh2 20.Kh2 Nf2 21.Qd4?? (21.Qd2 Qh4 22.Kg1–+) 21...e5!–+ 22.Qc5 (22.Qe5 Ng4 Double attack (22...Ng4 Decoy)) 22...Nd3 23.Qb5 (23.Qc2 Qh4 24.Kg1 Qf2 (24...Nc1?! 25.Rc1 Qh6 26.Qb3–+) 25.Kh1 Qe3–+) 23...Qh4 24.Kg1 Qf2 25.Kh1 (25.Kh2 Qe2 26.Rd1 Qh5 27.Kg1 Nb2 28.Rd5–+) 25…Qe2 (25...Qe2 26.Qd5 Ra6–+) 0–1. bobby fissure (2120) – Panza (2725), ChessWorld.net, 2019.

3.Nc3 ab4

4.Nb5 c5 5.a4 d5 6.Be5 (better 6.e3=) 6...Bd7?? (6...Na6 7.e3=) 7.e3 (better 7.Nc7 Qc7 8.Bc7+–) 7...Na6= 8.c3 f6 9.Bg3 e5 10.Be5 (10.Be5 fe5 11.Qh5 Ke7 12.Qe5 Be6 13.Nf3–/+) 1–0. mic – pguidote, net–chess.com, 2018.

4.Nb5 c6 5.Nd4 e5 6.Nb3 Qc7 7.e4 Nf6 8.Nf3 d6 9.Bc4 Be7 10.d3 0–0 11.0–0? (11.a3 d5 12.ed5 cd5–/+) 11...Nbd7 (11...d5!? 12.Be5 Qb7 13.ed5 cd5 14.c3 dc4 15.dc4–+) 12.a3 ba3 13.Ba3 (13.Ra3!? Rb8 14.Ra1–/+) 13...Nb6 14.Nbd2 Bg4 (better is 14...Ra3!? 15.Ra3 d5–/+) 15.Bb3=+ d5 16.Be7 Qe7 17.h3 Ra1 18.Qa1 Bf3 19.Nf3 Nfd7 20.Qb2 Kh8 21.Nd2 f5 22.f3 (22.ed5!? Nd5 23.Bd5 cd5 24.d4=+) 22...Qc5 23.Kh1 Qe3 24.c4 Qd3 (better is 24...fe4!? 25.de4 d4–/+) 25.cd5 cd5 26.Rd1 fe4 (26...de4?! 27.Ne4 Qe3 28.Nd6=) 27.Ne4 Qb5 (27...de4 28.Rd3) 28.Nc3= Qb4 29.Nd5 Nd5 30.Rd5 Nc5 31.Re5?? (better is 31.Qe5 Nb3 32.Rd7=) 31...Nd3–+ (31...Nb3?! 32.Re4 Qb5 33.Re3–+; 31...Qb3?! 32.Qb3 Nb3 33.Rb5–+) 32.Re4 Qe4!! (32...Nb2 33.Rb4 Nd3 34.Rd4+/–) 33.Qg7 (33.fe4 Rf1) 33...Kg7 34.fe4 Nc5 35.Bd5 Kf6 36.g4 Ke5 37.Kg2 Ne4 38.Be4 Ke4 39.Kg3 Rf3 40.Kh4 (40.Kg2 Kf4–+) 40...Kf4 41.Kh5 (41.g5–+) 41...Rh3 0–1. San Martin Perez,S – Echaniz de Fays,CJ (2000), Pasao–18..T–06., 1998.

3.e3 ab4

4.Bb5 Ra5 5.a4 c6 6.Be2 e5 7.Nf3 e4 8.Nd4 Nf6 (8...Qf6 9.c3 Qg6 10.Bf1=) 9.Nb3 Rg5 10.0–0 d5 11.f3 Be7 12.a5 0–0 (better is 12...Na6!?=) 13.a6+/– Nbd7 14.Nd4 Qc7 15.a7 Bb7 16.h4 Rg6 17.Nf5 Nc5 18.fe4 Nce4 19.h5 Rg5 20.h6 g6 21.Ne7 Qe7 22.d3 Ng3 23.Rf6 Qe3 (24.Rf2 Rf5–+) 0–1. Klaus Behrmann – nitousche, ChessWorld.net, 2004.

4.Bb5 Ra5 5.Be2 Bb7 6.Nf3 Nc6 7.c3 e5 8.cb4 Nb4 9.a3 Bf3 10.Bf3?? (better is 10.gf3 Nc6 11.Nc3=) 10...Nd3–+ 11.Ke2 Nb2 12.Qb3 Na4 13.Nc3 Nc3 14.Qc3 Rc5 15.Qb2 c6 16.d4 Rb5 17.Qc2 ed4 18.ed4 Qb6 19.Rhe1 Qd4 20.Kf1 Be7 21.Bc6 Rb2 (21...dc6?! 22.Qc6 Qd7 23.Qa8 Qd8 24.Qc6 Qd7 25.Qa8 Qd8 26.Qc6 Qd7=) 22.Bd7 Kd7 (< 22...Qd7 23.Qb2 f6 24.a4+=) 23.Qf5 Ke8 24.Qc8 Qd8 25.Qc3 Rd2 26.Qg7 Qd4 27.Qg3 Qd3 28.Qd3 Rd3 29.a4 Nf6 30.a5 Kd7 31.a6 Bd6 32.a7 Ra8 33.Reb1 Rc3 34.Rb7 (34.Ra6 Rc7 35.Rba1 Ne4–+) 34...Rc7 35.Rb8 (35.Rc7 Kc7 36.Ra6 Ne8–+) 0–1. weBNimzo (2105) – Gargouille (2015), ChessWorld.net, 2003.

4.Bb5 c6 5.Be2 e6 6.a3 ba3 7.Na3 Nf6 8.Nc4 d5 9.Ra8 Na6 10.Bf6 gf6 11.Nd6! Bd6 (11...Qd6 12.Rc8 Double attack (12.Ba6 Discovered attack; 12.Rc8 Deflection); 11...Bd6 12.Ba6 Discovered attack) 12.Ba6 0–0 13.Rc8 Qb6 14.Qg4 Kh8 15.Rf8 Bf8 16.Be2 (16.Bd3 h6+–) 16...Qb1 17.Bd1 Bb4 (17...Qb4 18.Qf3 Be7 19.c3+–) 18.Qf4 Qc1 (18...Be7 19.Qc7 Qb4 20.Qc6+–) 19.Qb4 (19.Qb4 Kg7 20.Ne2+–) 1–0. GuestKMYB – GuestVHBW, freechess.org, 2018.

4.Bb5 c6 5.Be2 Nf6 6.Nf3 d6 7.0–0 c5 8.c3 bc3 9.Nc3 Bb7 10.Qb3 Qc8 11.Ng5 e6 12.Rab1 h6 13.Bf3 Bf3 14.Nf3 Be7 15.d4 (15.Rfc1 0–0=) 15...cd4 (15...c4 16.Qc2=) 16.Nd4 0–0 17.Rfc1 Qa6 18.Ncb5 Qa2 19.Qa2 (19.Qd1!? Ra6 20.Ba3 Ra3 21.Rc2=) 19...Ra2=+ 20.Rc7 Nd5 (better 20...Re8=+) 21.Nc6? (better 21.Rb7 Rc8 22.Na7=+) 21...Nc6 22.Rc6 Bf6 (better 22...Rb8 23.Bc1 Nf6–+) 23.Bf6=+ Nf6 24.Nd6 Rfa8 25.h3 Ra1 26.Ra1 Ra1 27.Kh2 Ra7 28.Rc8 Kh7 29.Rf8 Kg6 30.Nc4 Nd7 31.Rd8 Nc5 32.g4 h5 33.Kg2 hg4 34.hg4 f5 35.Ne5 Kf6 36.Rh8?? (better 36.f4 g5 37.Rg8 gf4 38.ef4 Ra2 39.Kh3 fg4 40.Ng4 Kf5 41.Rg5 Kf4 42.Rc5=) 36...Ke5–+ 37.gf5 Kf5 38.Rh5 Ke4 (better 38...g5–+) 39.f3 (better 39.Rc5!? e5 40.Kg3=) 39...Ke3–/+ 40.Rc5 Ra2 41.Kg3 Ra1 (41...Kd4 42.Rg5=+) 42.Rc3 (better 42.Re5!? Kd4 43.Re6=) 42...Kd4–/+ 43.Rc8 Ke5 44.Rg8 Rb1 45.Kf2 Rb2 46.Kg3 Kf6 47.Re8 Kf7 48.Rh8 Rg2 (48...Rg2 49.Kg2 g6+–). avz81 (1705) – kostanov (1705), lichess.org, 2018.

2.Bb2 a6

3.a3 Nc6 (--> 1.b4 a6 2.Bb2 Nc6 3.a3 b5).

3.a3 d6 4.e3 Bb7 5.Nf3 Nc6 6.c4+= bc4 7.Bc4 d5 (7...e5 8.0–0+=) 8.Be2+/– Nf6 9.0–0 e6 10.d3 Be7 11.Nbd2 0–0 12.Re1 (12.Rc1 Rb8+=) 12...Qd6 13.Rc1 e5 14.e4 (14.Qc2 Nd7+=) 14...d4= 15.Nc4 Qd7?? (15...Qe6 16.Ng5 Qd7 17.Qd2+=) 16.Qc2?? (better is 16.Nce5 Ne5 17.Ne5+–) 16...Bd6= 17.Qa4 Rad8 18.Qb3 Ne8 19.b5 ab5= 20.Qb5 e5 draws heavy fire 20...Bc8?? 21.Nce5 Ne5–/+ 22.Ne5?? Qb5–+ 23.Nc6 Nf6 24.Bd4 Qg5 25.g3 Rd7 26.e5 Be5! 27.Ne5 Rd4 28.Nf3 Qd5 29.Nd4 Qd4 30.Bf1 Nd5 31.Rc4 Qb6 32.Rec1 Be6 33.R4c2 Rb8 34.Bg2 Qd4 35.Rc4 Qd3 36.Rc6 Qd2 37.Bd5 Bd5 38.Rc7 Re8 39.R7c2 Qd3 40.Rc3 Qe4 41.f3–+ Qd4 42.Kg2 Re2 43.Kh3 Be6 44.g4 Bg4! 45.fg4 Re3 46.Re3 Qe3 47.Kh4 Qc1 48.h3 Qa3 49.Kg5 f6 50.Kf4–+ Qb4 51.Kf3 Qb7 52.Kg3 Qc7 53.Kf3 g5 0–1. Fournier,Frederic (1875) – javo298 (1785), Active (2/0), 2005.

3.c4 Bb7 4.cb5 ab5 5.Nf3 e6 6.g3 (6.e4 A) 6...Bb4 A1) 7.Bb5?! Nf6= (7...Be4?? 8.Bg7 Be7 9.Bh8+–); A2) 7.Bg7 Be4 8.Bb5+–; B) 6...Be4 7.Bb5 Nf6= (7...Bb4 8.Bg7 Be7 9.Bh8+–)) 6...Nf6=+ (6...Bb4?? 7.Bg7 Nf6 8.Bh8+–) 7.Bg2 (7.e3 Bb4 8.a3 Ba5 9.Bb5 Qe7=+) 7...Bb4–/+ 8.0–0 Be7 9.d3 (9.a4 b4–/+) 9...d5 (9...0–0 10.a4 b4 11.Qc2–/+) 10.Nbd2 (10.Qb3 c6–/+) 10...Nbd7 (10...c5 11.a4 b4 12.Qc2–/+) 11.e4 (11.a4 b4–/+) 11...de4 12.Ne4 (12.de4 Nc5–/+) 12...Ne4 (12...0–0 13.Qc2–/+) 13.de4 Be4 14.Qe2 Bb7 (14...Bd5 15.Qb5 0–0 16.Rfd1–/+) 15.Ne5 (15.Rfd1!? Bd5 16.Bg7=+) 15...Bg2–+ 16.Kg2 Ne5 17.Qe5 (17.Be5 Qd5 18.Kg1 Bf6 19.Bf6 gf6–/+) 17...0–0?? (better 17...Qd5 18.Qd5 ed5–+) 18.Qg7 1–0. karazzweite (1885) – TwelveTeen (2500), lichess.org, 2017.

3.d4 Bb7 4.Nc3 Nf6 5.a3 g6 (5...e6!?=) 6.e3 Bg7 7.Bd3?? (7.a4 Nc6=) 7...0–0 (better 7...Bg2 8.f3 Bh1–+) 8.h3 (better 8.Nf3!?=) 8...Bg2–/+ 9.Be4?? (better 9.Rh2 Bb7 10.Nf3–/+) 9...Be4 10.Ne4 Ne4 11.Qf3 (11.Nf3 d5–+) 11...d5 12.0–0–0 (12.h4 a5–+) 12...Nd7 (12...a5 13.Ne2–+) 13.Ne2 Ndf6 14.Nf4 c6 (14...a5 15.ba5 Qd6 16.Qg2–+) 15.Rhg1 a5 16.Nd3 Nd7 (16...Qc7 17.c3–+) 17.Qe2 Nb6 18.Qe1 (18.f3 Nd6–+) 18...Nc4 19.c3 (19.f3 Ned6–+) 19...Nb2 (19...ab4!? 20.cb4 Qc8 21.Qf1–+) 20.Kb2 ab4 21.cb4 Qb6 22.Rc1 (22.Kb3 Ra7–+) 22...Nd6 (22...Qa7!? 23.Rc3 Nc3 24.Qc3–+) 23.Ra1 Nc4 24.Kb3 (24.Kc2 Ra7–+) 24...Ra7 25.a4 (25.Kc2 Rfa8 26.Nc5 Ra3 27.Ra3 Ra3–+) 25...ba4 26.Ka2 Rb8 27.Rb1 (27.Qc3 Qc7–+) 27...Qb5 28.Nc5 (28.Qc3 e6–+) 28...e5 29.Qc3 ed4 30.ed4 Re8 (30...Re7 31.Qd3–+) 31.Rge1 Rae7 32.Re7 Re7 33.Qd3 (33.Ka1 Re2 34.Rd1 Rf2–+) 33...Qb8 34.Qd1 Qf4 35.Nd3 Qd4 36.Qc2 a3 (better 36...Qc3 37.Qc3 Bc3 38.Ra1 Re2 39.Kb1 Nd2 40.Ka2 Nb3 41.Ka3 Na1 42.h4–+) 37.Rd1 (37.b5 cb5 38.Rd1 Rc7–+) 37...Nb2 (37...Ra7 38.b5 Qb2 39.Qb2 ab2 40.Kb3 Ra3 41.Kc2 Rc3 42.Kb1 Na3 43.Kb2 Rd3 44.Ka2 Rd1 45.Ka3 cb5 46.Kb3 Rd3 47.Kb4–+) 38.Rd2 (38.Nb2 Qb2 39.Qb2 ab2–+) 38...Nd3 39.Rd3 Qa1 (39...Qa1 40.Kb3 Ra7–+; better 39...Qb2 40.Qb2 ab2 41.Rb3 Ra7 42.Kb1 Ra1 43.Kc2 Rc1 44.Kd2–+) 0–1. petrobbo (2055) – Owdman (2155), ChessWorld.net, 2016.

3.e3 Ra7 4.Nf3+– Rb7 (4...Nc6 5.a4+–) 5.Be2 (5.a3+–) 5...a5? (better 5...Nc6!?+–) 6.a4+– ab4 7.ab5 (7.Bb5?! Nf6+=) 7...Rb6 (7...Nf6 8.0–0+–) 8.Bd4 (8.c3 c6+–) 8...Rd6 (8...Rh6 9.c3+–) 9.Bc5 Rd5 (9...Rg6 10.Bb4 Rg2+–) 10.Bb4 Rb5 (10...Nf6+–) 11.Bb5 c6 (11...Nf6+–) 12.Ba5 cb5 13.Bd8 (13.Bd8 Kd8 14.Qe2+–) 1–0. Janek – Fisicus, internet, 2018.

3.e3 c6 4.a3 f6 5.Nf3 e5 6.Be2 d5 7.d4 Bd6 (better 7...e4!? 8.Nfd2 Qc7=) 8.de5+– Be5 (8...fe5!? 9.Ne5 Nf6+–) 9.Ne5+– fe5 10.Be5 Nf6 11.Bd4 Nbd7 (11...a5 12.Nd2+–) 12.0–0 Qc7 (12...Qe7 13.a4 Rb8 14.ab5 ab5 15.Bh5 g6 16.Bg4+–) 13.Nd2 (13.a4 ba4 14.Bh5 g6+–) 13...0–0 14.Nb3 Rf7 15.Nc5 (15.a4!? Rb8+–) 15...Nc5+– 16.Bc5 Bf5 17.Bd3 (17.a4 Ne4 18.ab5 Nc5 19.bc5 cb5 20.Qd5 Rd8+–) 17...Be4 (17...Ng4 18.f4 Qd7 19.a4+–) 18.f3 Bd3 19.Qd3 Nd7 20.Rae1 (better 20.Bd4!?+–) 20...Nc5= 21.bc5 Raf8 22.Qd4 a5 23.e4 de4 24.Re4 Qb7 25.Rfe1 b4 (25...Qc8 26.c4+–) 26.Qe3 (26.ab4!? ab4 27.Qb4 Qb4 28.Rb4 Rc7+–) 26...ba3+– 27.Qa3 Qb5 28.Ra1 Rf5 (28...Rd8 29.c4 Qb4 30.Qe3+– (30.Qa5? Rd1 31.Rd1 Qa5–+)) 29.Qa5 Rc5 30.Qb5 (30.Qa2 Rd5+–) 30...cb5 31.Ra2 (31.Re7 Kh8 32.Raa7 Rg8+–) 31...Rfc8 32.Rb2 h6 33.Reb4 The isolani on b5 becomes a target 33...Rc3 34.Rb5 Rc2 35.Rc2 Rc2 36.Rb8 Kh7 37.Rb1 Kg6 38.Rf1 Kh5 39.g3 g5 40.Rf2 g4?? (better 40...Rc1 41.Kg2 Kg6+–) 41.Rc2 gf3 42.Rc4 f2 43.Kf2 Kg5 (43...Kg6 44.Kf3 Kf7 45.Kg4+–) 44.Kf3 h5 45.h4 Kh6 46.Kf4 Kg6 47.Rc5 Kf6 48.Rg5 Ke6 49.Rh5 Kf7 50.Rg5 Kf6 (50...Ke7 51.h5 Ke6 52.h6 Kd7 53.h7 Kc6 54.h8Q Kb7 55.Qf6 Kc8 56.Rg7 Kb8 57.Qd8) 51.h5 Kf7 (51...Ke6 52.h6 Ke7 53.h7 Kd7 54.h8Q Ke7 55.Qg7 Ke6 56.Qh6 Ke7 57.Rg7 Ke8 58.Qh8) 52.h6 Kf6 (52...Ke7 53.h7 Kd6 54.h8Q Ke6 55.Qh6 Ke7 56.Rg7 Ke8 57.Qh8) 53.h7 Kf7 (53...Ke6 54.h8Q Ke7 55.Qg7 Ke6 56.Qh6 Ke7 57.Rg7 Ke8 58.Qh8) 54.h8Q Ke6 (54...Ke7 55.Qg7 Ke6 56.Qh6 Ke7 57.Rg7 Ke8 58.Qh8) 55.Qh6 Kd7 (55...Ke7 56.Rg7 Ke8 57.Qh8) 56.Rg7 (56.Rg7 Ke8 57.Qh8) 1–0. BeepBeepImAJeep (2610) – Pul5ion (1945), lichess.org, 2016.

3.e3 h5 4.h4 (4.a4 ba4 5.Ra4 Nc6+=) 4...e5 5.a3 f6 6.Nc3 d5 7.d4 e4 8.f3 f5 9.Nh3 Be7 10.Nf4 Qd6? (better is 10...Bh4 11.Kd2 Bg5=) 11.Ncd5+– Rh6 (11...Nd7 12.c4+–) 12.fe4 fe4 13.Be2 Bf5 (13...Nf6 14.Nf6 Bf6 15.Bh5 Kd8 16.c4+–) 14.Ne7 Ne7 15.c4 bc4 16.Bc4 c6 17.Qb3 Nd5 18.Nd5 (better is 18.Bd5!? cd5 19.Qd5 Qd5 20.Nd5+–) 18...cd5 19.Bd5 Be6? (better is 19...Qg3 20.Kf1 Rf6+–) 20.Bc4?? (better is 20.Be6!? Re6 21.0–0+–) 20...Bc4?? (20...Qg3 21.Kd1 Qg2=) 21.Qc4+/– Qg3 22.Kd1 Qg2 23.Qc8 (23.Rf1!? Qg4 24.Kd2 Qg2 25.Qe2+–) 23...Kf7 24.Qf5 White claimed a win on time (24.Qf5 Kg8 25.Qd5 Kh7 A) 26.Qa8?? A1) 26...Qh1?! 27.Kc2 Qf3 28.d5 (28.Qb8? Qe3 29.Rd1 Qe2 30.Rd2 Rc6 31.Kb3 Qd2–+) 28...Qe2 29.Kb3 Qd3 30.Bc3=; A2) 26...Rc6 27.Qc6 Qh1 28.Kc2 Qh2 (28...Nc6?? 29.Rh1 Ne7 30.Rf1+–) 29.Kb3 Nc6–+; B) 26.Re1 Qb2 27.Qe4 Rg6 28.Rc1=) 1–0. BLUEMOONIE – rgp, ChessWorld.net, 2013.

3.e3 h6 4.Nf3 d6 5.a3 (5.a4 ba4 6.Nc3 Nf6+=) 5...Bg4 (5...e5 6.a4 e4 7.Ng1 ba4 8.d3=) 6.Be2 Bf3 (6...e5!?+=) 7.Bf3+– Nd7? (better 7...d5!?+–) 8.Ba8+– Qa8 9.0–0 Ne5 (9...d5 10.a4 Qb7 11.ab5 ab5 12.f4+–) 10.d3 Ng6 (10...Nf6 11.a4 Qb7 12.Bd4+–) 11.Nd2 (11.a4 Qb7+–) 11...e5 12.Qf3 (12.c4 Nf6+–) 12...Qf3 13.Nf3 f6 14.c4 c6 15.cb5 ab5 16.a4 ba4 17.Ra4 Kd7 18.Ra7 Ke6 19.d4 (19.h4 h5+–) 19...e4 20.Nd2 d5 21.Ba3 (21.Rc1 Bb4 22.Rc6 Kf5 23.Rg7 N8e7 24.g4 Kg4 25.Rf6 Rb8+–) 21...N8e7 (better 21...Bd6+–) 22.Nb3 f5 23.Nc5 Kf7 24.Rb1 (better 24.Nb7+–) 24...h5? (24...f4+–) 25.b5 cb5 26.Rb5 h4 27.h3 Kg8 28.Ne6 Rh5 (28...Kf7 29.Nf8 Rf8 30.Rd5 Ra8 31.Rf5 Ke6 32.Re5 Ne5 33.Re7 Kf6 34.de5 Kf5+–) 29.Nf8 (better 29.Rb8!? Kh7 30.Rf8 Nf8 31.Nf8 Kg8 32.Be7 Rh6+–) 29...Kf8 30.Be7 Ne7 31.Rbb7 Kf7 (31...Nc8 32.Ra8 Kg8 33.Rc8 Kh7 34.Rd8+–) 32.Re7 Kf6 33.Rg7 (33.Rf7 Kg5+–) 33...Rh8 34.Kh2 Rf8 35.Rh7 (35.Rh7 Kg5 36.g3+–) 1–0. retiponziani (1880) – Papakudos, ChessWorld.net, 2011.

3.e4 d6 4.d4 e6 5.d5 e5 (5...Nf6 6.Qf3=) 6.Be2 Nf6 7.Qd3 Bg4 (7...c6 8.Nc3=) 8.h3 (8.Bg4 Ng4 9.Nf3 c6+/–) 8...Be2 9.Ne2 h6 10.Ng3 g6 11.0–0 Bg7 12.Nd2 (12.a4 ba4 13.Ra4 0–0+/–) 12...0–0 13.c4 Nbd7 14.cb5 ab5 (14...Qb8 15.a4+/–) 15.Qb5+– Nh5 (better is 15...Rb8 16.Qc4 Qe7+–) 16.Nh5 gh5 17.Qe2 Qg5 18.Nf3 Qf6 (18...Qd8 19.a4+–) 19.a4 h4 20.a5 Qf4 21.a6 (21.Bc1 Qf6+–) 21...Kh7 (21...f5 22.Bc1 Qe4 23.Qe4 fe4 24.Nh4+–) 22.a7 Rg8 (22...f5 23.Bc1 Qe4 24.Qe4 fe4 25.Nh4+–) 23.Bc1 Qf6 24.Qb5 Nb6 25.Be3 (25.Qc6 Bh8 26.Ne1 Qd8+–) 25...Bf8 (25...Qg6 26.Rfc1 Qe4 27.Rc7 Nd5+–) 26.Bb6 (26.Ne1!? Bg7+–) 26...cb6 (26...Qf3 27.g3 hg3 28.Qc4 gf2 29.Kh2 Qg2) 27.Qb6?? (better is 27.Ne1 Qf4 28.Qc6+–) 27...Qf3 28.g4 (28.g3 hg3 29.Qb7 gf2 30.Kh2 Qg2) 28...Qh3 (28...Rg4 29.hg4 h3 30.Qd6 Qg2) 29.f3–+ Qg3 (better is 29...h5!? 30.Qb7 hg4 31.Qf7 Rg7 32.Qf5 Kh8–+) 30.Kh1–/+ Be7 31.Qg1 Qg1 (31...Bg5 32.Qg3 hg3 33.Kg2+=) 32.Kg1 (better is 32.Rg1!? h5 33.b5+=) 32...Bd8 33.Kh2 Bb6 34.Ra6 Ba7 (34...Bd4 35.Rd6 Ra7 36.Kh3–/+) 35.Kh3 (better is 35.Rfa1 h5 36.Kh3 hg4 37.fg4=) 35...Rgd8?? (better is 35...Be3 36.Rd6 Ra2–/+) 36.f4?? (better is 36.Rfa1!? Rd7 37.b5+/–) 36...Rd7?? (36...Bd4 37.Ra8 Ra8 38.fe5 Ra3 39.Kh4 Be5 40.g5–+) 37.f5?? (better is 37.Rfa1 ef4 38.b5=) 37...Rb8 38.Rb1 Bf2 39.b5 f6 (39...Rdb7 40.Ra5–+) 40.Kg2 (40.Rb2!? Bg3–+) 40...Bc5 41.Kh3 Rdb7 42.Ra5 h5! 43.gh5 Bf2 (43...Rg8 44.Rb3–+) 44.Kg4? (better is 44.Rb2 Bg3 45.Ra6–/+) 44...Rg7–+ 45.Kf3 (45.Kh3 Kh6 46.Ra2 Bb6–+) 45...Bd4 (better is 45...Bb6 46.Ra6 Rg3 47.Ke2 Re3 48.Kd2 Re4–+) 46.Ra6 (46.Rc1 Rbg8 47.Ke2 Rg2 48.Kd3 R2g3 49.Kd2 Rh3–+) 46...Rg3 (46...Rbg8 47.Ra2 Rg3 48.Ke2 Rg2 49.Kd3 Ra2 50.Kc4 Ra4 51.Kb3–+) 47.Ke2 Kh6 (better is 47...Re3 48.Kf1 Rg8–+) 48.Rd6 Kh5 49.Rf6 Ra8 (better is 49...Re3!? 50.Kd2–+) 50.Ra6 Rc8 51.Rc6 Rb8 52.d6?? (52.Rf6 Re3 53.Kd2 Re4 54.d6–+) 52...Re3–+ 53.Kd2 Re4 (53...Rg8 54.Re1 Rg2 55.Kd1 Rd3 56.Kc1–+) 54.f6 (54.d7 Rd8 55.Rc7 Bb6–+) 54...Kg6 (54...Rf4 55.d7 Rd8 56.Rd6–+) 55.d7? (better is 55.b6–+) 55...Rd8 56.Rd6 Be3 57.Kd3 (57.Kc3 Rd4 58.Rc6 R4d7–+) 57...Rd4 58.Rd4 Bd4 (58...ed4?! 59.b6 Kf6 60.b7–+) 59.b6 Bc5 (better is 59...Rd7 60.Ke4 Rb7–+ (60...Kf6?! 61.b7 Ba7 62.Rb6 Kg5 63.b8Q Bb8 64.Rb8–+)) 60.Kc4 Bd6?? (better is 60...Bb6 61.Rb6 Rd7–+) 61.Kd5+= Rd7 62.Ke6 Rd8 63.Rd1 h3 64.Rd6 Rd6 65.Kd6 Kf6 66.b7 h2 67.b8Q h1Q 68.Qf8 Kg6 69.Qe8 Kg5 70.Qg8 Kf4 71.Qf7 Kg3 72.Qg6 Kh2 73.Ke5 Qe1 74.Qe4 Qe4 75.Ke4 ½–½. Booony (1845) – angel027, ChessWorld.net, 2014.

3.e4 e5 4.Be5 d6 (4...Nc6!? 5.Bb2 Qe7=) 5.Bb2 f6 6.Nf3 Qe7 7.d3 (7.Nc3 c6+/–) 7...Bb7 8.Be2 d5 9.0–0 de4 10.de4 Qe4? (better is 10...Qb4 11.Bc3 Qe7+= (< 11...Qe4 12.Re1 Ne7 13.Bb5 ab5 14.Re4 Be4 15.Qe2 Bf3 16.Qf3+–)) 11.Re1+– Be7 12.Nbd2?? (better is 12.Bb5 ab5 13.Re4 Be4 14.Nc3+–) 12...Qc6? (better is 12...Qb4!? 13.Rb1 Qa5=) 13.Bf1 Nh6 14.Nd4 Qd5 (14...Qd7!?+/–) 15.a3 0–0?? (better is 15...Qd7 16.c4 0–0+–) 16.Re7 Rc8 17.Ne6 (better is 17.c4 Qd6 18.Re6+–) 17...Nc6 (17...Nf5 18.Nc7 Qc6 19.Rg7 Ng7 20.Na8 Ba8+–) 18.Rg7 Kh8 19.Nc7 (19.Bf6!? Qe6 20.Rg6 Qf6 21.Rf6 Kg7+–) 19...Qd6 (19...Qf5 20.Bd3 Kg7 21.Bf5 Rc7 22.Ne4+–) 20.Na8 (better is 20.Nb5 ab5 21.Rb7 Ra7 22.Rb5 Ne5+–) 20...Kg7 21.Nb6 Rd8 22.Be2 (better is 22.Qf3 Na5 23.Qe3 (23.ba5?! Bf3 24.Nf3 Qc5+–) 23...Qh2 24.Kh2 Ng4 25.Kg3 Ne3 26.fe3 Rd2 27.ba5 Rc2 28.Bd4+–) 22...Qd2 23.Qd2 Rd2 24.Bd3 Ne5 25.Be5 (better is 25.Bc3!? Rd3 26.cd3 Nd3+–) 25...fe5 26.f3 Nf7 27.Nd7 Nd6 28.Ne5 Ne8 29.Re1 Nc7 (29...Nd6+–) 30.Ng4 Nd5 31.Ne3 (31.Nf2 h6+–) 31...Nc3 (31...Nf4 32.Rd1 Rd1 33.Nd1 h6+–) 32.Nf1 Rd3 33.cd3 Bd5 34.Nd2 h5 35.Nb1 Nb1 36.Rb1 Kf6 37.d4 Kf5 38.Kf2 Kf4 (38...h4+–) 39.Re1 Kf5 40.Re5 (40...Kf6 41.Rd5+–) 1–0. valpa – Grunert, HCL–C1958 playchess.de, 2003.

3.e4 e6 4.Nf3 (4.a4 A) 4...Bb4 5.Bg7 (5.ab5?! Nf6=) 5...Qh4 6.Qe2+–; B) 4...Nf6=) 4...Bb7 (4...Bb4?? 5.Bg7 Nf6 6.Bh8 Ne4 7.c3+–) 5.d3 (5.Bd3 Nf6= (5...Bb4?? 6.Bg7 Nf6 7.Bh8+–)) 5...Ne7 (better 5...Bb4!? 6.c3 Be7–/+) 6.Be2 Ng6 7.0–0 (7.Qd2 Nc6 8.a3 a5=) 7...d6 (7...Bb4!? 8.Bg7 Rg8=) 8.Nbd2 e5 (8...Nc6 9.a3+=) 9.a3 (9.a4 Nc6 10.ab5 ab5+–) 9...Be7 10.d4 Nd7 11.d5 (11.c4 bc4 12.Bc4 0–0+=) 11...0–0 12.c4 c6 13.a4 bc4 14.Bc4 (14.dc6!? Bc6 15.Bc4=) 14...cd5=+ 15.Bd5 Bd5 16.ed5 Nb6 (16...Qb6 17.Qb3=+) 17.Ne4 Nc4 18.Ba3 (18.Bc1 Rc8=) 18...Rc8 19.b5 ab5 (19...f5 20.Nc3=+) 20.ab5= Qb6 21.Qb3 (21.Nc3 Ra8 22.Qb3 Na3 23.Ra3 Ra3 24.Qa3 Rc8=) 21...Nf4 22.Rfc1? (better 22.Rfe1=+) 22...Ne2–+ 23.Kf1 Nc1 24.Rc1?? (24.Bc1 Rc7–+) 24...Na5 (24...Na3 25.Qa3 Qb5 26.Ke1 Qd5 27.Nc3–+) 25.Qb2? (25.Qb4 f5 26.Ng3–+) 25...Rc1 26.Qc1 Qb5 27.Kg1 Nc4 28.h3 (28.Ned2 Nd2 29.Qd2 Ra8–+) 28...Qb3 (better 28...Na3!? 29.Qd1–+) 29.Nd6 (29.Nfd2 Nd2 (29...Qa3?! 30.Qc4 f5 31.Ng3–+) 30.Nd2 Qd5–+) 29...Bd6 30.Bd6 Nd6 31.Ne5 Qd5 32.Qg5 (32.Ng4 Rc8 33.Qe1 Re8–+) 32...Qd1 (better 32...f6 33.Qe3 fe5 34.f3–+) 33.Kh2 Ne4 34.Nf3 (34.Qh4 Qe2 35.Qg4 Qg4 36.Ng4–+) 34...Ng5 35.Ng5 f6 36.Ne6 Qd6 37.g3 Qe6 38.Kg2 (38.h4 Rd8 39.h5 Rd2 40.Kg2 Qd5 41.Kh3 Rf2 42.g4 Qd3 43.Kh4 Rh2) 38...Rd8 (38...Qe4 39.Kh2 Qf3 40.h4 Rd8 41.Kh3 Rd1 42.h5 Rh1) 39.Kf3 (39.h4 Qe4 40.Kg1 Rd1 41.Kh2 Qh1) 39...Rd3 40.Kf4 (40.Kg2 Qe4 41.Kh2 Rd1 42.g4 Qf3 43.h4 Rh1) 40…g5 0–1. aravind555 – LuckvsSkills, lichess.org, 2018.

3.f3 Bb7 4.e4 d6 5.d3 (5.a4!?+=) 5...e5 6.Nd2 f5 7.Be2 fe4 8.de4 (worse 8.Ne4 d5 9.Ng3 Bb4 10.c3 Ba5–/+; 8.fe4?! Nc6=) 8...Nf6 9.Nh3 Be7 10.Ng5 (10.a4 Qd7=) 10...Qd7 11.Nb3 h6 12.Na5 hg5 13.Nb7 Nc6 14.a4 Rb8 15.Na5 Na5 16.ba5 c6 17.ab5 cb5 18.Ba3 Rc8 19.Qd2 Qc6 (19...g4 20.Rd1 gf3 21.Bf3=+) 20.0–0 (20.Rc1!?+=) 20...Qc2=+ 21.Qe3 g4?? (better 21...Rc3 22.Qf2 g4=+) 22.Rac1 Qa4 (22...Rc3 23.Qc3 Qe2 24.Qc8 Kf7 25.Qh8 Qe3 26.Kh1 Qa3 27.fg4 Qa5+–) 23.Rc8 Bd8 24.Bc1 (24.Bd6 Qd4 25.Qd4 ed4+–) 24...Kd7 (24...Qa5 25.f4 Kd7 26.Rb8+–) 25.Rc3 (25.Qa7 Kc8 26.Be3 Qa5 27.Rc1 Qc7 28.Rc7 Bc7 29.Qa8 Bb8 30.Qa6 Kd8+–) 25...Qd4 26.Qd4 ed4 27.Rc2 gf3 28.gf3 (28.Rf3?! Ne4 29.Bd3 Nc5+–) 28...Re8 (28...Nh5 29.Bd2 Rf8 30.f4+–) 29.Bd3 Ba5 (29...Nh5 30.Bd2 Re6 31.Rfc1 Rg6 32.Kf2 Bh4 33.Kf1+–) 30.Bg5 (30.Ra2!? Bc7+–) 30...Bc3 31.Bf6 gf6 32.Kf2 (32.Ra2 b4+–) 32...Rg8 (32...Rh8 33.Kg3 Rh5 34.Rb1+–) 33.Rg1 (better 33.Ra2!? b4+–) 33...Rh8 34.Rg6 (better 34.Kf1 Rb8 35.Rcg2+–) 34...a5?? (34...Rh2 35.Kg1 Rc2 36.Bc2+–) 35.Rf6 (better 35.Bb5 Ke6 36.Kg3+–) 35...b4? (better 35...Rh2 36.Kf1 Rc2 37.Bc2 a4+–) 36.Kg3 1–0. alessandrocarvalhaes (1930) – Ositozym (2075), lichess.org, 2020.

3.Nf3 h6 4.e3 Bb7 5.c4 bc4 6.Bc4 d5 7.Be2 e6 8.a3 Be7? 9.d3 Bf6 10.Qc2 Bb2 11.Qb2 Qf6 12.Qf6 Nf6 13.Nbd2 0–0 14.0–0 Nbd7 15.Rfc1 c6 16.Nb3 e5 17.Na5 Rab8 18.Nb7 Rb7 19.Rc6 Nb8 20.Rc2 e4 21.Nd4 ed3 22.Bd3 Nbd7? 23.Rac1 Ne4? 24.Be4 de4 25.Rc7 Rc7 26.Rc7 Ne5 27.Ra7 f5 28.Ra6 Nc4 29.a4 Rb8 30.b5 Kh7 31.Nf5 Nb6 32.Nd4 Nd5 33.a5 Nc3 34.b6 Na4 35.Ra7 Nb6 36.ab6 Rb6 37.g3 Rb1 38.Kg2 Rd1 39.Nf5 Kg6 40.Ng7 h5 41.Ne6 Kf6 42.Nf4 Kg5 43.Ra5 Kg4 44.h3 1–0. Fournier,Frederic (1995) – woojtas76 (1795), Active (5/0), 2004.

3.g3 c6 4.Bg2 d5 5.Nf3 Bf5 6.0–0 e6 7.Nh4 Bg6 8.Ng6 hg6 9.a4 Bb4 10.ab5 cb5 11.Na3 Nf6 12.Nb5 Be7 13.Nd4 Nbd7 14.Nc6 Qc7 15.Ne7 Ke7 16.d3 Rh6 17.c4 Rah8 18.h4 Qb7 19.Bc1 R6h7 20.Qa4 Ra8 21.Bd2 Qb2 22.Bb4 Ke8 23.Rfe1 Qe5 24.f4?? Qe3–+ 25.Kh2 a5?? 26.Bc3?? Ng4 27.Kh3 Nf2 28.Kh2 Ke7?? 29.cd5?? Ng4–+ 30.Kh3 f5 31.de6 Qe6 32.Ba8+– Kf7 33.Qa2 Nf2 34.Kg2 Ng4 35.e4 Ndf6 36.ef5 gf5 37.Qe6 Kg6 38.Ra5 Rh8 39.Qf5 Kh6 40.Bf6 Nf6 41.Be4 Ne4 42.Qh5 1–0. ariank – olek1935, kurnik, 2011.

3.g3 e6 4.Bg2 c6 5.d3 Bb4–/+ 6.Nd2 Bf8 (6...Nf6 7.Ngf3–/+) 7.a4 Bb7 (7...d5!?=+) 8.ab5= ab5 9.Ra8 Ba8 10.Qa1 Bb7 11.Bg7 Bg7 12.Qg7 Qf6 13.Qf6 Nf6 14.Ngf3 Ke7 15.0–0 d5 16.Ra1 Nbd7 (16...Na6 17.d4=) 17.Ra7+= Rb8 18.Nb3 Bc8 (18...c5 19.d4 Kd6 20.dc5 Nc5 21.Ng5 Nb3 22.cb3+=) 19.Nfd4 (19.e4!?+–) 19...Kd6= 20.Ra1 (20.f4 c5 21.Nf3 Ng4=) 20...c5=+ 21.Nf3 Rb6 22.c4? (better 22.e3=+) 22...bc4–+ 23.dc4? (23.Nc1 c3 24.e3–+) 23...Rb3 24.cd5 Nd5 (better 24...ed5!? 25.Ng5 Ke7 26.Kf1–+) 25.Ng5 Nc3 26.Nf7 (26.e3 Bb7–+) 26...Ke7 27.Ng5 Ne2 (27...h6 28.Nf3–+) 28.Kf1 Nd4 29.Nh7 Nf6 (29...c4 30.Ng5–+) 30.Ng5 Nd5 (30...Rb2 31.Ra7 Bd7 32.Rb7–+) 31.Ra7 (31.Be4 Rb2–+) 31...Kf6 (31...Bb7!? 32.Be4–+) 32.Ne4 Ke5?? (better 32...Kg6 33.Ra1 c4–+) 33.Nc5?? (better 33.f4 Nf4 34.gf4 Kf4 35.Nc5=+) 33…Rb1 0–1. JUANKARODA (1730) – Alllanpoe (1740), lichess.org, 2020.

3.a3 Bb7

4.c3 d5 5.d4 Nf6 6.f3 (6.a4 e6=) 6...Nc6 7.g4 (7.a4 e5 8.ab5 ab5 9.Ra8 Ba8=) 7...e5–/+ 8.de5 (8.e3 Nd7–/+) 8...Ne5 9.e3 Ned7 (9...Bd6 10.a4 Nc4 11.Bc4 bc4 12.Ne2–/+) 10.h3 (10.g5 Nh5 11.Nh3 Qe7=+) 10...g5 (10...Bd6 11.a4 ba4 12.Qa4–/+) 11.Nd2 (11.h4!? gh4 12.c4=) 11...h5 12.gh5 Nh5 (12...Bd6 13.Nb3–/+) 13.Ne2 (13.c4!? Rh6 14.cb5=+) 13...Bd6 14.c4 (better 14.Nb3–/+) 14...g4?? (better 14...Be5 15.Bd4 dc4–+) 15.hg4+– (15.Bh8?? Qh4 16.Ng3 Ng3–+ (16...Qg3 17.Ke2 gf3 18.Kd3 dc4 19.Kc2–+; 16...Bg3?! 17.Ke2–/+)) 15...Bg3?? (15...Be7 16.Qc2 Bh4 17.Kd1 Nhf6 18.cb5 Rh6+–) 16.Ng3 Qg5 (16...dc4 17.Nh5 Rg8 18.Ng7 Kf8 19.Nf5+–) 17.f4 Qe7 (17...Qg6 18.Nh5 Rg8 19.cb5 ab5 20.Bb5+–) 18.Nf5 Qd8 19.Bh8 dc4 20.Rh5 c3 21.Bc3 Nf6 22.Rh8 Kd7 23.Rd8 Rd8 24.Ne4 (better 24.Bf6!? Kc8 25.Bd8 a5+–) 24...Nd5 25.Nc5 (25.Nc5 Kc8 26.Bg2+–) 1–0. Delboy Smith (1740) – Little Ironman, ChessWorld.net, 2009.

4.d3 d5 5.Nd2 e6 6.Ngf3 Nd7 7.g3 Ngf6 8.Bg2 c5 9.bc5 Bc5 10.0–0 0–0 11.c4 dc4 12.dc4 Qb6 13.h3 Rfe8 ½–½. Babiy,A (2450) – Kolisnichenko,Svitlana, Sun Pawn Open, Ilichevsk UKR, 2007. (=1.a3 a6 2.b4 b5 3.Bb2)

4.e3 Nc6 5.Nf3+= d6 (5...Nf6 6.c4 bc4 7.Bc4+=) 6.c4 bc4 7.Bc4 e6 8.d4 d5 9.Bd3 Bd6 10.Nbd2 Nf6 11.0–0 0–0 12.h3 (12.Nb3+/–) 12...Ne4 (better is 12...a5!? 13.b5 Ne7+=) 13.Ne4+/– de4 14.Be4 f5 15.Bd3 g5 (15...Qf6!?+/–) 16.Qc2 (16.Bc4 Qf6+–) 16...h5 (16...Nb8 17.Ne5+–) 17.Ne5 (17.d5!? ed5 18.Bf5 Kf7+–) 17...Ne5 18.de5 Be7 19.f3 (19.Rac1 c5 20.Rfd1 Qd5+–) 19...Rf7 (19...c5 20.bc5 Bc5 21.Qc5 Qd3+–) 20.Rad1 Rc8? (20...Qe8+–) 21.Ba6! Ba6 22.Rd8 Rd8 23.Rd1 Rff8 24.Rd8 Rd8 25.Bd4 Bb7 26.Qc7 Bd5 27.Qe7 Rf8 28.Qg5 Kh8 29.Qh5 Kg7 30.Qg5 Kh7 31.h4 Rg8 32.Qg8! Kg8 33.b5 Kf8 34.a4 Ke8 35.a5 Kd7 36.b6 Kc8 37.h5 Bc6 38.h6 Kb7 39.h7 Ka6 40.h8Q Ka5 41.Qd8 Kb5 42.Qc7 f4+– 43.ef4 Kc4 44.Bf2 Kd5 45.b7 (45.b7 Kc4 46.Qc6 Kd3 47.Be1 Ke2 48.Qc3 Kd1 49.Qd2) 1–0. Fournier,Frederic (1895) – sUiCiDa, Active (3/0), 2006.

4.e3 Nc6 5.Nf3 e5 6.c4 (6.Ne5!? Nf6 7.Nf3+–) 6...bc4 7.Ne5 (worse 7.Be5 Ne5 8.Ne5 Qf6=+) 7...Ne5 8.Be5 d6 (8...a5 9.Bc4 Qg5 10.Qb3 (worse 10.Bc7 Rc8–/+) 10...Qe5 11.Bf7 Kd8 12.d4–/+) 9.Bb2 Qg5 10.Nc3 (worse 10.Bc4 Qg2 (10...Bg2? 11.Rg1 Qh4 12.Qb3 Qh2 13.Rg2 Qg2 14.Bf7 Kd8 15.Bg8+–) 11.Rf1 d5=+ (worse 11...Qh2 12.Qa4 Ke7 13.Qa5+=)) 10...Bg2?? (better 10...Nf6+=) 11.Rg1+– Nf6 12.Bg2 (better 12.Rg2 Qf5 13.Bc4+–) 12...Qh6 (12...Kd8+–) 13.Ba8 Qh2 14.Bc6 Kd8 15.Rh1 Qe5 16.Qc2 Be7 (16...Qe6 17.Qa4 Qc8 18.Nd5+–) 17.Nd5! c3 (17...Qd5 18.Bd5) 18.Bc3 Qe6 19.Ne7 (19.Qd3 h5+–) 19...Qe7 (19...Ke7 20.Bb7 a5 21.b5+–) 20.0–0–0 (better 20.Qa4 Qe6+–) 20...Ne4 (20...Qe6+–) 21.Qe4 Qe4 22.Be4 (22.Be4 c5 23.Bg7+–) 1–0. BeepBeepImAJeep (2515) – lawyer7, lichess.org, 2017.

4.e3 d5 5.Nf3 e6 6.Nc3 h6 7.Bd3 Bd6? (7...Nf6 8.0–0=) 8.0–0 (8.Nb5 Bf8 9.Nc3 Nf6+/–) 8...Nd7? (8...Nf6 9.Nd4=) 9.Qe2 (better is 9.Nb5 Bf8 10.Nc3+/–) 9...e5= 10.Ne1 (10.Bf5 Ne7 11.Bh3 0–0=) 10...Qh4 (better is 10...e4!? 11.Bb5 ab5 12.Nb5 Bf8–/+) 11.Nf3 Qe7 12.e4 Ngf6 (better is 12...d4!? 13.Nd1 c5+=) 13.ed5+/– Nd5 14.Rfe1 (14.Nd5 Bd5 15.Rae1 0–0+/–) 14...Nc3 (14...Nf4!? 15.Qe3 Nd3 16.Qd3 0–0=) 15.Bc3+/– 0–0 16.Bb2 (better is 16.Ne5!? Ne5 17.Be5+=) 16...Rfe8= 17.c3? (better is 17.Be4 Be4 18.Qe4=) 17...e4–+ 18.Be4 (better is 18.Bb5 ab5 19.Qb5–+) 18...Be4 19.d3 Bf3 20.gf3 (20.Qe7 Re7 21.Re7 Be7 22.gf3–+) 20...Qg5 21.Kh1 (21.Kf1 Re2 22.Re2 Bh2 23.Re3–+) 21...Re2 22.Re2 Qh4 (22...Qf4 23.Re8 Re8 24.Kg2 Qh2 25.Kf1 Qh1) 23.c4 Qh2 0–1. pieeater – Daz101, ChessWorld.net, 2012.

4.e3 e6 5.c4 c6 6.c5 Nf6 7.d4 Be7 8.Bd3 0–0 9.Nd2 (9.Nf3 a5+=) 9...d6 (9...a5 10.Ngf3=) 10.Ngf3 (10.cd6 Bd6 11.e4 Nfd7+=) 10...dc5= 11.bc5 Nbd7 (11...Bc5 12.Bh7 Kh7 13.Qc2 Kg8 14.dc5+=) 12.Qc2 Qc7 13.0–0 a5 14.e4 b4 (14...h6!?+=) 15.ab4+– ab4 16.e5 Nd5 17.Bh7 Kh8 18.Ne4 (better 18.Bd3!?+–) 18...g6 (18...b3 19.Qd3 Ba6 (19...Kh7?? 20.Nf6 Kh8 21.Qh7) 20.Ra6 Nb4 21.Qb3 Ra6+–) 19.Neg5 Bg5 20.Ng5 Kg7?? (better 20...Qd8!? 21.Ra8 Qg5+–) 21.Ne6 (better 21.Bg6 b3 22.Qe4 Qd8+–) 21...fe6 22.Qg6 (22.Bg6?! Ba6 23.Rfe1 Qd8+=) 22...Kh8 23.Qh6 Threatening mate: Be4 23...N7f6 24.Bg6 (better 24.Be4! Nh7 25.Ra8 Ra8 26.Qe6+–) 24...Nh7+– 25.Bh7 (25.Ra8!? Ra8 26.Be4+–) 25...Qh7+= 26.Qe6 Nf4 (26...Rae8 27.Qg4 Bc8–/+) 27.Qb3?? (27.Qg4 Ra1 28.Ba1=) 27...Rg8 (27...Qe4 28.Qf3 Ne2 29.Qe2 Qe2 30.Rab1–+) 28.g3?? (better 28.Ra8 Ba8 29.g3–/+) 28...Raf8 (28...Qe4 29.Qf3 Qf3 30.Ra8 Ne2) 29.d5?? (better 29.Qe3=) 29...cd5 (better 29...Qe4 30.e6 Kh7–+) 30.e6+– Rg7 31.Qb4?? (better 31.Bg7 Qg7 32.Ra7+–) 31...Ne2 (better 31...d4 32.Qb7 Ne2 33.Kg2 Rb7–+) 32.Kg2–/+ Qe4?? (better 32...d4 33.c6 Bc6 34.f3 Rf6 35.Qb8 Qg8 36.Qg8 Kg8–+) 33.Qe4+– de4 34.Bg7 Kg7 35.Ra7 Rb8 (35...Kf6 36.e7! Ke7 37.Rb7 Ke6 38.Re1+–) 36.c6 Kf6 37.c7 (better 37.Rb7!? Rc8 38.e7 Nd4+–) 37...Nf4 38.Kh1 (better 38.gf4 Rg8 39.Kh1+–) 38...e3 (38...Rc8 39.gf4 Bd5+–) 39.Rb7! e2 Do you see the mate threat? (39...Rb7 Deflection from c8 40.c8Q) 40.Re1 Rc8 41.gf4 Kf5 42.e7 Kf4 43.Rb8 Rc7 (43...Re8 44.Re8 Kg4 45.Rf8 Kh4 46.Rg1 e1Q 47.Rh8) 44.e8Q (44.e8Q Rc6 45.Qc6 Kg4 46.Qg6 Kf4 47.Rb5 Kf3 48.Qf5) 1–0. nimzo1 (1925) – retiponziani (1790), ChessWorld.net, 2012.

4.e3 e6 5.d4 d6 6.c4 (6.Nf3 Nf6+=) 6...c6 (6...bc4 7.Nf3 d5 8.Nc3=+) 7.c5 (7.Nc3 Nf6=) 7...dc5 (7...Nf6 8.Bd3=) 8.bc5 Nd7 9.Qc2 (9.Bd3 e5+=) 9...h5 (9...e5!?=) 10.Nd2 e5 11.0–0–0 (11.Ngf3 ed4 12.Bd4 h4+=) 11...Qe7 (11...ed4 12.ed4 Ngf6 13.Bd3=) 12.Bd3 (12.Ne4 Qe6 13.de5 Ne5 14.Nd6 Bd6 15.Rd6 Qe7+–) 12...0–0–0 13.Ne2 (13.Ngf3 Kb8+=) 13...g6 (13...ed4 14.ed4 Qg5+=) 14.Rdg1 (14.Ne4 Kb8 15.Nd6 Bg7+=) 14...Nh6 (14...f5 15.Qb3=) 15.f4 (15.Ne4 Qe6+=) 15...Bg7 (15...Ng4 A) 16.de5? Nc5 (16...Qc5?! 17.Kb1–/+) 17.Be4 Nf2–+ (17...Ne4?! 18.Ne4 Ne3 19.Qb3–/+); B) 16.fe5 Bh6 17.h3–/+) 16.h3 (better 16.fe5 Ng4 17.Ne4+=) 16...Rdg8?? (16...ef4!? 17.ef4 Qe3=+) 17.g4 (better 17.fe5!? Kb8 18.a4+–) 17...ed4 (17...ef4 18.ef4 hg4 19.hg4+=) 18.ed4 hg4 19.hg4 f6 (better 19...g5+=) 20.Bg6?? (better 20.Ne4 Nf7 21.Rh8 Rh8 22.d5+–) 20...Qe2–/+ 21.g5 Ne5?? (21...Ng4 22.Rh8 Rh8–/+ (worse 22...Bh8 23.Bf5+=)) 22.Bf5 (22.gh6 Nf3 23.hg7 Rh1 24.Rh1 Rg7+–) 22...Kd8?? (22...Nf5 23.Rh8 Nd3 (23...Bh8?! 24.Qf5 Nd7 25.g6–+; 23...Rh8?! 24.fe5 Ne3 25.Qg6–/+) 24.Qd3 Qd3 25.Rg8 Kd7 26.Rg7 Ng7 27.gf6 Nf5–+) 23.gh6+– (23.fe5?! Nf5 24.Qf5 Bc8+–; 23.de5?! Nf5 24.ef6 Rh1 25.Rh1 Bc8 26.fg7 Be6+–) 23...Bc8 (23...Bh6 24.Rg8 (24.fe5?! Rg1 25.Rg1 Qf2+–) 24...Rg8 25.de5 (25.Rh6?? Rg1 26.Nf1 Qf1 27.Qd1 Qd1; worse 25.fe5 Qf3 26.Qe4 Qb3+–) 25...Bf4 26.ef6+–) 24.hg7 (better 24.de5 Bh6 25.Rg8 Rg8 26.Bc8 Bf4 27.Rd1+–) 24...Bf5 (24...Rh2 25.Rh2 Qh2+–) 25.gh8Q (25.de5? Rh1 26.Rh1 Bc2 27.Kc2 Rg7 28.ef6 Rf7–+) 25...Rh8 26.Rh8 Kd7 (26...Ke7 27.Qf5 Nd3 28.Kb1 Qg2 29.Rh7 Qg7 30.Rhg7 Ke8 31.Qc8) 27.Rg7 (27.Qf5 Ke7 28.Re8 Ke8 29.Qe6 Kd8 30.Rg8 Kc7 31.Qc8) 27...Ke6 (27...Nf7 28.Qf5 Ke7 29.Rf7 Kf7 30.Qh7 Ke6 31.f5 Kd5 32.Qd7) 28.Re8 Kd5 29.Rd8 Ke6 (29...Bd7 30.Rgd7 Nd7 31.Qf5 Qe5 32.Rd7) 30.d5! (30.d5 cd5 31.Re8) 1–0. pat_cash87 – Melissa23d, lichess.org, 2020.

4.e3 e6 5.d4 Nf6 6.Nf3 Be7 7.Nbd2 d6 8.c4 Qd7 9.c5 (9.Bd3 0–0+=) 9...Nc6 10.e4 0–0 11.Be2 Rad8 12.d5 (12.0–0!?=) 12...ed5–/+ 13.ed5? (13.Bf6 Bf6 14.ed5 Ba1 15.dc6 Qc6 16.Qa1 dc5 17.Nb3 cb4 18.Na5–+) 13...Nd5–+ 14.Nd4? (14.cd6 Qd6 15.0–0–+) 14...dc5 15.Nc6 Qc6 16.Bf3 c4 (16...Qe6 17.Kf1 cb4 18.Qc2–+) 17.Be5 (17.Qc2–+) 17...Qe6 18.Qe2 c5 (18...Bg5 19.Nc4 bc4 20.0–0–+) 19.Bd5 (19.bc5 Bc5 20.0–0 Rfe8–+) 19...Qd5 20.Bc3 (20.0–0–0 Rfe8 21.Nf3–+) 20...cb4 21.Qe5 (21.Be5–+) 21...bc3 22.Qc3 (22.Qd5 Bd5 23.Nf1 Bg2 24.Rg1–+) 22...Bf6 23.Qc1 Rfe8 24.Kd1 Ba1 (24...Qg2 25.Re1 Bf3 26.Kc2 Qg6 27.Ne4 Be4 28.Re4 Qe4) 25.Qa1 Qd2 0–1. keene2019 (1700) – tapanis (1850), gameknot.com, 2020. (=1.a3 a6 2.b4 b5 3.Bb2 Bb7)

4.e3 Nf6 5.Be2?? (5.Nf3 e6=) 5...e6?? (better is 5...Bg2 6.Bf3 Bh1 7.Bh1 d5–+) 6.Nf3= d5 7.d3 (7.0–0 c5 8.a4 c4=) 7...Nbd7 8.0–0 Be7 9.Nbd2 0–0 10.Rc1 (10.Nb3 Rb8=) 10...Rc8 (10...a5 11.Rb1=) 11.c4 bc4 12.dc4 dc4 13.Nc4+= c5 14.bc5 Nc5= 15.Qd8 Rfd8 16.Rfd1 Rd1 17.Rd1 h6 18.h3 Nce4 19.Nd4 Ng4?? 20.hg4+– f5 21.gf5 ef5 22.Nf3 Bf6 23.Bf6 gf6 24.Rc1 Kf7 25.Bf1 a5 26.a4 Ba6 27.Rc2 Bc4 28.Rc4 Rc4 29.Bc4 (29.Bc4 Ke7 30.Nd4+–) 1–0. Fournier,Frederic (1850) – chanstef (1860), Active, 2007.

4.Nf3 d6 5.e3 e5 6.c4 Nf6 (better is 6...e4!? 7.Nd4 c5 8.bc5 dc5=) 7.cb5+/– ab5 8.Bb5 c6 9.Be2 Be7 10.d4 ed4 11.Nd4 0–0 12.0–0 Nbd7 13.Bf3 Ne5 14.Nf5 Qd7 15.Be5 (15.Be5 Qf5 16.Bd6+/–) 1–0. Fedoseev,Vl3 (2310) – Fedoseeva,V (1755), Chigorin Memorial, St Petersburg RUS, 2008. (=1.a3 a6 2.b4 b5 3.Bb2 Bb7)

4.Nf3 f6 5.e3 (5.d4 e6+=) 5...e5= 6.Be2 Be7 7.c4 (7.0–0+=) 7...Nh6 (better is 7...bc4!? 8.Bc4 d5=) 8.cb5+/– ab5 9.Bb5 Ba6 (9...Nf7 10.0–0+/–) 10.Nc3 (10.Ba6 Ra6 11.d4 e4+/–) 10...Bb5 11.Nb5 c6 12.Nc3 0–0 (12...d5 13.0–0+/–) 13.Qe2 (13.d4 Nf7+–) 13...Kh8 (13...d5 14.0–0+/–) 14.0–0 Nf5 (14...d5 15.d4 e4 16.Nd2+/–) 15.d4 (15.Qd3 Nh6+–) 15...ed4 16.ed4 Re8 (16...d5 17.Rfe1 Re8 18.Qc2+/–) 17.Qd3+– Na6?? (better is 17...Nd6+–) 18.Qf5 Nc7 19.Rfe1 (19.d5 cd5 20.Nd5 Rb8+–) 19...Bd6 20.Ne4 Nb5 21.Nd6 Nd6 22.Qf4 Nc4 23.Bc3 Re1 24.Re1 Ra3 25.Qc1 Ra8 26.Nd2 Nd2 27.Qd2 Ra6 28.d5 cd5 29.Qd5 Qa8 30.Qa8 Ra8 31.h3 Kg8 32.Rb1 Kf7 33.b5 g5 34.b6 Kg6 35.b7 Rb8 36.Ba5 Kf7 37.Bc7 Rb7 38.Rb7 Kg6 39.Ba5 h6 40.Rd7 f5 41.g4 fg4 42.hg4 Kf6 43.f3 Ke6 44.Rh7 Kf6 45.Rh6 Ke5 46.Kg2 Kf4 47.Bc7 Ke3 48.Rf6 Kd3 49.Kg3 Kd2 50.Rf5 (50.Rf5 Kc2 51.f4 gf4 52.Kf4 Kb3 53.g5 Kc4 54.g6 Kb3 55.g7 Kb4 56.g8Q Kc3 57.Ba5 Kb2 58.Rb5 Kc1 59.Qc4 Kd1 60.Rd5) 1–0. Fournier,Frederic (1910) –matenquatre (1950), Active (1/0), 2003.

3.a3 c6

4.e3 Bb7 (4...Nf6 5.Nf3=) 5.Nf3+= d6 (5...Nf6 6.c4+=) 6.Be2 (6.d4 Nf6+=) 6...e6 (6...a5 7.ba5 Qa5 8.c4 bc4 9.Bc4+=) 7.0–0 Nd7 (7...Nf6 8.c4+=) 8.c4 (8.Nc3 c5+=) 8...bc4 9.Bc4 d5 10.Be2 Ngf6 11.Nc3 (11.Ne5 c5=) 11...Be7 12.d3 (12.Qc2 0–0=) 12...0–0= 13.Rc1 (13.Na4 a5=) 13...Re8 (13...a5 14.b5=) 14.Qd2 (14.Qb3 c5=) 14...Nf8 (14...c5 15.Na4 cb4 16.ab4=) 15.Rfd1 (15.Rc2 N8d7+=) 15...h6 (15...N8d7 16.Rc2+=) 16.e4 (16.Na4 N8d7+=) 16...de4 (16...a5!?=) 17.de4+– Qd2 18.Rd2 (better 18.Nd2 a5 19.ba5+=) 18...Ne4?? (better 18...a5 19.ba5 Ra5=) 19.Rdc2 (better 19.Ne4 a5 20.Nc5 ab4 21.ab4 Bc5 22.Rc5+–) 19...Nc3=+ 20.Rc3 Rac8 (20...a5 21.ba5 Ra5 22.Rb3=+) 21.R3c2 (21.Ne5 Bf6 22.R3c2 Red8=) 21...Nd7 22.Nd4 Attacking the isolated pawn on c6 (22.Ne5 Ne5 23.Be5 Red8=+) 22...Bf6 (better 22...c5!? 23.Nb3 cb4 24.ab4 Rc2 25.Rc2 Bb4–/+) 23.Nb3= Bb2 24.Rb2 c5 (24...Rc7 25.Rd2=) 25.bc5 (25.Nc5 Rc7+=) 25...Bc6 (25...Bd5!? 26.Ba6 Rc7+=) 26.Na5+– Bb5 (better 26...Rc7!?+–) 27.Bb5+– ab5 28.Rb5 Ne5 (28...Kf8 29.Kf1+–) 29.c6 Nd3 30.Rc3 (30.Rc2 e5+–) 30...Nf4 31.Kf1 (31.Rc4 Red8 32.h3 Rd5+–) 31...Nd5 (31...Red8 32.Rb1+–) 32.Rc1 (32.Rcb3 Rc7+–) 32...Nc7 (32...Rc7 33.Rb7+–) 33.Rb7 Na6 (33...Red8 34.Nc4 Nd5 35.Ne3+–) 34.g3 (better 34.Rd7 Rc7 35.Rb1+–) 34...Rb8? (34...Rc7 35.Rd1+–) 35.Nc4 (better 35.c7 Rbc8 36.Rc6 Re7 37.Ra6 Rec7 38.Rc7 Rc7+–) 35...Rec8 36.Nd6 (36.Rb6 Nc7+–) 36...Rb7 37.Nc8 (better 37.Nb7 Rc7 38.Ke2+–) 37...Rc7+= 38.Nd6 Nb8 39.a4 Rc6 40.Rc6 Nc6 41.Nc4 Na7 (41...Kf8 42.f4+=) 42.a5 Kf8 43.Ke2 Ke7 44.Ke3 Kd7 45.Kd4 (45.Ne5 Kc7+–) 45...Kc6 46.Ne5 Kb5 47.Nf7 Ka5? (47...Nc6 48.Ke4+–) 48.Ke5 (48.Nd8 Kb6 49.Ne6 g5+–) 48...Nb5 (48...Nc6 49.Ke6 Nd4 50.Ke7+–) 49.Ke6 (49.Nd8!? g5+–) 49...Nd4 50.Ke5 Nf3 51.Kf5 Nh2 52.Ne5 (52.Kg6 Ng4 53.f4 Ne3+–) 52...g5? (better 52...Kb5!?+–) 53.Kg6+– h5 (53...g4 54.Kh6 Kb6 55.Kg5+–) 54.Kh5 g4 55.Ng4 Nf3 56.Kg6 (56.Nf6 Kb4+–) 56...Kb5 (56...Kb4 57.Kf6+–) 57.Kf5 Kc5 (57...Nd4 58.Kf6+–) 58.Kf4 (58.Ne5 Nd4 59.Kf6 Ne2+–) 58...Nd4 59.Ke3 (59.Ne3 Nb3+–) 59...Ne6 60.f4 Kd5 (60...Nd4 61.Nh6+–) 61.Nf2 (61.Nf6 Kd6+–) 61...Nd4 62.Nd3 Nf5 63.Kf3 Ng3 (63...Nd4 64.Kg4 Kc4 65.Ne5 Kd5+–) 64.Kg3 Ke6 65.Nf2 (65.Kh4 Kf5 66.Kh3 Ke4+–) 65...Kf5 66.Kf3 Kf6 67.Ne4 (67.Kg4 Ke7+–) 67...Kf5 68.Ng3 Kf6 69.f5 (69.Ke4 Ke6+–) 69...Kg5 70.Ke4 Kf6 71.Kf4 Kg7 72.Ne4 Kf7 73.Ke5 White prepares f6 73...Kg7 74.f6 Kf7 75.Nd6 (75.Nd6 Kf8 76.Ke6 Kg8 77.Ke7 Kh8 78.f7 Kg7 79.f8Q Kg6 80.Qf5 Kg7 81.Qf6 Kh7 82.Nf5 Kg8 83.Qg7) 1–0. FeegLood (2790) – johnybv50 (1850), lichess.org, time forfeit, 2016.

4.Nf3 a5 5.e4 (5.d3 d6=) 5...ab4 6.ab4 Ra1 7.Ba1 Na6 8.c3 Bb7 (8...d5 9.e5=) 9.d4 Qa8 (9...d5 10.Nbd2) 10.Bb2 (10.Nbd2 Nc7) 10...c5 (better is 10...Nc7!?) 11.dc5+– Be4 12.Bb5 Bf3?? (better is 12...Qb7 13.Na3 Nb8) 13.Qd7 (13.gf3?! Nf6+/–; 13.Qf3?! Qf3 14.gf3 Nb8+–) 1–0. Wall,Bill – Suntan, internet, 2005.

3.a3 Nf6

4.a4=.

4.e3 Bb7 5.c4 (5.Nf3 e6=) 5...bc4 6.Nf3 d5 7.Nc3 (7.d3 cd3 8.Bd3 e6=+) 7...e6 8.d3 cd3 9.Bd3 Bd6 10.0–0 0–0 11.h3 (11.Na4 Nbd7=+) 11...Nbd7–/+ 12.Nd2 (12.Qc2 c5–/+) 12...Ne5 (12...c5 13.bc5 Nc5 14.Be2–/+) 13.Bc2 Ng6 (13...Rb8 14.Na4–/+) 14.f4 (14.Nb3 Qe7–/+) 14…c5 0–1. alddhsfd (1765) – Rezatorankan (1930), lichess.org, 2019.

3.a4 ba4

4.Ra4 Bb7 5.e3 e6 6.Nf3 Bf3 7.Qf3 Nc6 8.c3 Rb8 9.Ba6 Ne5 10.Qg3 Bd6 11.Qg7 Qf6 12.Qf6 Nf6 13.0–0 1–0. Wall,Bill – FastPlay, Microsoft Gaming Zone, 1999.

4.Ra4 d6 5.e3 Nf6 6.b5 ab5?? (better 6...c6=) 7.Ra8+– e5 (7...Bd7+–) 8.Rb8 Be7 (8...c6 9.Ra8+–) 9.Bb5 c6 (9...Nd7 10.f4+–) 10.Bc6 (10.Bc6 Nd7 11.d4+–) 1–0. RichardSommer (2040) – Ccxdenis (2010), lichess.org, 2020.

4.Ra4 Nf6 5.c4 e6 6.b5 (6.Nc3 Bb7=) 6...Bb7=+ 7.e3 ab5 (7...h6 8.Nf3=) 8.Ra8= Ba8 9.cb5 Bc5 10.Nf3 c6 11.Qa4 Bb7 12.Ne5 0–0 13.bc6 Nc6 14.Qb5 Qb6 15.Nc6 (15.Qb6 Bb6 16.Nc4 Bc5=) 15...Bc6 16.Qb6 Bb6 17.Be2 Rb8 (17...Bg2? 18.Rg1 Rb8 19.Bf6+– (19.Rg2 Bd8–/+)) 18.0–0 d6 (18...Ne4 19.Ba3=) 19.Bf6 gf6 20.Nc3 Ba5 21.Nb1 (21.Ra1!? Bc3 22.dc3=) 21...Rb2–/+ 22.Rc1 Be4 23.d3 Re2 (23...Bg2!? 24.Kg2 Re2=+) 24.de4= Rb2 25.Na3 Bb4 26.Nc4 Ra2 27.Rb1 (27.g4 Kg7=) 27...Bc5 28.h3 Ra4 29.Nd2 Bb4 30.Nf3 Bc3 (30...Kg7 31.Nd4=) 31.Rc1 Be5 32.Ne5 (32.Nd2 Bb2 33.Rc6 Ra1 34.Kh2 Kf8+=) 32...de5 33.f3 Ra2 34.Rc3 Kg7 35.Kh2 Kg6 36.Kg3 h5 37.h4 Ra1 38.Rc7 Re1 39.Rc3 f5 40.ef5 Kf5 (40...ef5 41.f4 f6 42.Rd3=) 41.e4 Kg6 42.Rc8 Kg7 43.Rc7 Rh1 44.Rc2 Kg6 45.Rc8 Kg7 46.Re8 Kg6 (46...Rd1 47.Rb8=) 47.Rg8+= Kh7 (better 47...Kh6!?+=) 48.Rg5+– f6 49.Rh5 Kg7 50.Kf2 Rh2?? (better 50...Ra1+–) 51.Kg3 (better 51.Kg1 Kg6 52.Kh2 Kh5 53.Kh3+–) 51...Rh1= 52.Kf2 (52.Kf2 Rh2 53.Kg1+–) 1–0. AhmedSultanov (1855) – Haythamov (1880), lichess.org, 2019.

4.e3 d5 5.Nf3 e6 6.Be2 (better 6.Ne5+=) 6...Bb4?? (better 6...Nf6 7.Ra4 c5 8.bc5 Bc5=) 7.Bg7+– f6 (7...Nf6 8.Bh8 Bd6 9.Ra4+–) 8.Bh8 Qe7 9.Nh4 (9.c3 Bd6+–) 9...Bd6 10.Bh5 (10.d4 c5+–) 10...Kd7 (10...Kd8 11.Qf3 (worse 11.Ra4 Nh6+–) 11...Bb7 12.d4+–) 11.c4 Be5 (11...c6+–) 12.d4 Bd6 13.c5 Bc5 14.dc5 h6 (14...Qc5 15.0–0+–) 15.Qg4 Qh7 (15...Qf8 16.0–0 Nc6 17.Ng6 Qc5 18.Nf4+–) 16.Qa4 c6 17.Ng6 Ne7 (17...Kd8+–) 18.Nf8 (18.Nf8 Kc7 19.Qa5 Kb7 20.Qb6) 1–0. DEFFM – GuestSBYT, freechess.org, 2019.

4.Nf3 Nc6!?=.

4.Nf3 d6 5.c4 Bd7 6.Nc3 e5 7.g3 Be7 8.Bg2 Ra7 9.d4 Bf6 (9...Nf6 10.de5 de5 11.Ne5 Bb4 12.Nd7 Qd7 13.Ra4+=) 10.de5+– de5 11.Ne4 (11.Nd5 a5 12.b5 c6 13.Nf6 gf6+–) 11...Qe7+= 12.0–0 Nh6 13.Qd2 0–0?? (better 13...Nf5+–) 14.Nf6+– Qf6 15.Ne5 Qe7 (15...Qd8 16.Nd7 Qd7 17.Qd4 Qd4 18.Bd4+–) 16.Bd4 c5 17.Bc5 Qe5 18.Ba7 Bg4 (18...Be6 19.c5+–) 19.Ra4 Qe6 20.Rfa1 Nd7 (20...Qc4 21.Bb8 Rb8 22.Ra6+–) 21.f3 Bf5 (21...Bh5 22.Ra6 Qe8 23.Bh3+–) 22.e4 Bg6 23.Ra6 Qc4 (23...Qe8 24.Be3 Nb8 25.Ra8+–) 24.Qd7 Qb4 25.Qd5 Kh8 (25...Be4 26.fe4 Ng4 27.Bc5+–) 26.Bc5 (26.Bc5 Qc3 27.Bf8 Qe3 28.Kf1+–) 1–0. pcmvr – capacuba (2335), net–chess.com, 2014.

3.a4 Bb7

4.ab5 ab5 5.e3 Ra1 6.Ba1 c6 7.Nf3 e6 8.Be2 Ne7 9.Nc3 Nf5 10.Qb1 (10.Na2 Na6=) 10...Be7 (10...Na6 11.Na2=) 11.Ne4 0–0 12.Bb2 (12.Nc5 Bc8=) 12...Bb4 (12...Na6 13.c3 Qc7=) 13.Be5 (better 13.Bg7!? Bd2 14.Ned2 Ng7 15.c4=) 13...Qa5 (13...Na6 14.c3 Ba3 15.0–0–/+) 14.Qb2 (14.g4 Ne7=+) 14...d5 15.Ng3 f6 16.Nf5 (16.Bb8 Rb8 17.Nf5 ef5 18.c3–/+) 16...ef5 (16...fe5 17.0–0 Ba3 (17...Bd2?! 18.Nd6 Bc8 19.Nd2 Qd2 20.Nc8 Rc8 21.Qe5+=) 18.Nh6 gh6 19.Qe5 Qd8 20.Qe6 Kg7–/+) 17.Bd4 (17.Bg3 Nd7=+) 17...c5–/+ 18.c3 (better 18.0–0 Ba3 19.Bc3–/+) 18...cd4?? (better 18...Ba3 19.Qb5 Qb5 20.Bb5 Ba6 21.Ba6 Na6–/+) 19.cb4+– Qb6 20.Nd4 Nd7 (20...Nc6 21.Nf5 (21.Nb5?! Ba6 22.Nd4 Nd4 23.Ba6 Nf3 24.Ke2 Nd2+=) 21...Rd8 22.d4+–) 21.Nb5 (21.Bb5 Ne5 22.0–0 Bc6+–) 21...Ne5 22.Nd4 (22.Qd4 Qe6+–) 22...h6 (22...f4!?+–) 23.0–0 (23.Nf5 Qe6 24.Nd4 Qf7+–) 23...Bc8 (23...f4 24.ef4 Nc6 25.Nc6 Bc6 26.Bf3+–) 24.Rc1 Bd7 25.Qb3 Re8 (25...Kh7 26.f4 Nc4 27.Bc4 dc4 28.Rc4+– (28.Qc4?! Rc8 29.Qf1 Rc1 30.Qc1 Qb4+–)) 26.f4 Nc6 (26...Nf7+–) 27.Qd5 Be6 (27...Kh7 28.Qd7 Nd4 29.ed4 Rd8 30.Qf5 Kg8+–) 28.Ne6 Nb4 (28...Ne7 29.Qd7 Kh7 30.Qe8 Qe6 31.Rc7 Qg8 32.Qe7 h5 33.Bc4 Kg6 34.Bg8 h4 35.Qg7 Kh5 36.Bf7) 29.Qd7 Re6 30.Qe6 (better 30.Bc4 Kh7 31.Be6 Qe6 32.Qe6 Nd5 33.Qf5 Kg8 34.Qd5 Kh7 35.Qe4 f5 36.Qf5 g6 37.Rc7 Kg8 38.Qc8) 30...Qe6–+ 31.Kf2 Kh7 32.h3 (32.Rc4 Nd5–+) 32...Qb3 (better 32...Qd6 33.d4–+) 33.Rf1 (33.Rc4 Qb1 34.Rd4 h5–+) 33...Qc2 34.Kf3 Qd2 35.Rf2 (35.Rd1 Qc3 36.g4–+) 35...Nd5 36.Bf1 (36.g3–+) 36…Qe3 0–1. AhmedSultanov – Akrapovik, lichess.org, 2019.

4.ab5 e6 5.e3 ab5 6.Ra8 Ba8 7.Nf3 Nf6 8.Bb5 Bb4 9.0–0 Be7 10.Nc3 0–0 11.Qa1 (better 11.Qe2=) 11...d5?? (better 11...Bf3 12.gf3 c6=+) 12.Qa8+– c6 (12...Qd6 13.Ra1+–) 13.Bc6 Qb6 (13...Nc6 14.Qc6 Qd6 15.Nd4+–) 14.Bb5 Bd6 (14...Nbd7 15.Qa4+–) 15.Nd4 (15.Ra1 Nbd7 16.Qc6 Qc6 17.Bc6 Rc8+–) 15...e5 16.Nc6 (16.Na4 Qc7 17.Nf5 Bb4+–) 16...Nbd7? (16...d4 17.ed4 ed4+–) 17.Qa6 Qc7 (17...Qa6 18.Ba6 Nb8 19.Nb8 Rb8 20.Nb5+–) 18.Na5 (18.Ra1 d4 19.Nd1 de3 20.Ne3 e4+–) 18...e4 (18...Nc5 19.Qc6 d4 20.Qc7 Bc7 21.ed4 ed4 22.Nc6 dc3 23.Bc3+–) 19.g3 (19.h3 Nc5 20.Qc6 Qb8+–) 19...Ne5 (19...Rb8 20.Nc6 Nc5 21.Qa7 Qa7 22.Na7+–) 20.Nb7 (20.Be2 Rb8 21.Nb5 Qb6 22.Qb6 Rb6+–) 20...Nf3 (20...Bb4 21.Be2 Rb8 22.Nb5+–) 21.Kg2 Be5 (21...Bb4 22.Qc6 Qc8 23.Nd5 Nd5 24.Qd5 Nh4 25.Kh1+–) 22.Qc6 (22.d4 ed3 23.Kf3 dc2+–) 22...Qb8 (22...Qc6 23.Bc6 Rc8 24.Nd5 Nd5 25.Bd5 Bb2 26.Rd1+– (26.Be4?! Nd2 27.Bf5 Rc6+–)) 23.Nd5 (better 23.d4!? ed3 24.cd3 Rc8+–) 23...Bb2 24.Nf6 (24.Rd1 Ng5+–) 24...Bf6 25.Qe4?? (better 25.d4+–) 25...Ng5?? (better 25...Nd2 26.Qd5 Nf1 27.Bf1 Qc7+=) 26.Qd5+– Qc8 (26...Qc7 27.f4 Ne6 28.f5+–) 27.h4 (27.c4!? Qh3 28.Kg1 Qg4+–) 27...Qh3 28.Kg1 Ne6 29.Re1 (29.d4 Qg4+–) 29...Bh4 (29...Qg4 30.d4+–) 30.Bf1 (30.gh4 Qh4 31.Bd7 Qg4 32.Qg2 Qc4+–) 30...Qg4 31.Be2 Qh3 (31...Qg6 32.Bd3 Qg4 33.Bf5+–) 32.Qg2 (better 32.Qh5 Nd8 33.Nd8+–) 32...Qg2 33.Kg2 Bf6 (33...Rb8 34.gh4 Rb7 35.d4+–) 34.Na5 (34.d4 Rb8 35.Nd6 Rb2+–) 34...Rb8 (34...Ra8 35.Nc6+–) 35.Nc4 (35.d4 Ra8 36.Nc6 Kf8+–) 35...h5 (35...Kf8 36.d4+–) 36.d4 (36.Bh5 Rb4 37.Be2 Kf8+–) 36...Rc8 (36...g6 37.Ra1+–) 37.Bd3 Ng5 (37...Rb8 38.Ra1+–) 38.f4 (better 38.Nb6 Rd8 39.c4+–) 38...g6 (38...Ne4+–) 39.fg5 Bg5 40.Kf3 (40.Rb1 Kg7+–) 40...h4 (40...Kf8 41.Ra1+–) 41.Rf1 (41.Kg4 Be7 42.gh4 Kg7+–) 41...h3 (41...hg3 42.Kg3 f5 43.Ne5 Be3 44.Ng6+–) 42.Rh1 Bf6 43.Rh3 Rc4 (43...Bg7+–) 44.Rh2 (better 44.Bc4 Kg7 45.Bd5+–) 44...Rc3 45.Re2 (45.Kf4 Kg7+–) 45...Rc6 (45...Kf8 46.Ke4+–) 46.Ke4 (46.c4 Kf8+–) 46...Rd6 (46...Rc3 47.Kd5+–) 47.Rf2 (47.c4 Kf8+–) 47...Be7 (47...Bg7 48.Bc4 Rd7 49.Bd5+–) 48.Kf3 (48.Bc4 Rf6 49.Rf6 Bf6+–) 48...Re6 (48...Rf6 49.Ke2+–) 49.Ke2 (49.c4 Rf6 50.Ke2 Rf2 51.Kf2 Bb4+–) 49...Rf6 (49...Kf8 50.e4+–) 50.Bc4 (50.Rf6 Bf6 51.c4 Kf8+–) 50...Rf2 51.Kf2 Kg7 (51...Bb4 52.Bd5+–) 52.Bd3 f5 (52...Bb4 53.c4+–) 53.Kf3 (53.Bf5 gf5 54.Kf3 Kf6+–) 53...Bd6 (53...Kf6 54.g4+–) 54.c4 (better 54.Bf5 gf5 55.c4+–) 54...f4 (54...Kf6+–) 55.c5 fg3 (55...Be7 56.gf4 g5+–) 56.cd6 g2 (56...Kf7 57.e4 Ke6 58.e5+–) 57.Kg2 g5 58.d7 g4 (58...Kf6 59.d8Q Ke6 60.Bc4 Kf5 61.Qf8 Kg6 62.Bd3 Kh5 63.Qh8 Kg4 64.Qh3) 59.d8Q Kh6 (59...Kf7 60.Qd7 Kf6 61.d5 g3 62.Qe6 Kg7 63.Qe7 Kg8 64.d6 Kh8 65.Qf8) 60.Qd6 (60.Qf6 Kh5 61.Qg6 Kh4 62.Qh6) 60...Kg5 (60...Kg7 61.Qe7 Kh6 62.Qh7 Kg5 63.Qg6 Kh4 64.Qh6) 61.Qg6 Kh4 62.Qh6 1–0. FeegLood (2820) – TwelveTeen (2630), lichess.org, 2017.

4.e3 e6 5.Nf3 (5.ab5 ab5 6.Ra8 Ba8=) 5...Nf6 (5...Bb4?? 6.Bg7 (6.ab5?! Nf6=) 6...Be7 7.Bh8+–) 6.ab5 ab5 (6...Bb4 7.Ra4 Be7 8.Nc3=) 7.Ra8 Ba8 8.Bb5 Bb4 9.0–0 0–0 10.c3 Bd6 11.Be2 Nc6 12.c4 Ng4 13.h3 Nge5 14.Nc3 (14.d4 Nf3 15.Bf3 Qf6=) 14...Nf3 15.Bf3 Ne5 16.Be2 Qg5 Threatening mate... how? 17.f4?? (better 17.f3=+) 17…Qg2 0–1. RichardSommer (2115) – kokomaung (2000), lichess.org, 2020.

4.ab5 ab5 5.Ra8 Ba8

6.Na3 Na6 7.Qa1 f6 8.Nb5 Nb4?? (better is 8...Bb7) 9.Qa8!!+– Nc2 (9...Qa8 10.Nc7) 10.Kd1 (10...Qa8 11.Nc7 Kf7 12.Na8+–) 1–0. Hanison,Bernard – Bivens,William, corr ICCF TT–4–90–4, 1993.

6.Na3 Na6 7.Qa1 Nf6 8.Nb5 Nb4? 9.Qa8 Qa8 10.Nc7 1–0. Wall,Bill – DSDG, FICS, 2012.

6.Na3 Na6 7.Qa1 Nf6 8.Nb5 Bb7 9.Be5.

6.Na3 c6 7.Qa1+/– Nf6 (7...f6 8.Nb5 Bb7 9.Qa7+=) 8.Nb5 cb5 (8...Bb7!? 9.Bf6 gf6+/–) 9.Qa8 e6 (9...Nc6 10.Qd8 Kd8 11.Bf6 gf6 12.c3+–) 10.Bf6+– gf6 11.c3 Bd6 (11...Nc6 12.Qb7+–) 12.e3 0–0 (12...Qb6 13.Nf3+–) 13.Bb5 Qc7 14.Qf3 (14.Qe4 Nc6+–) 14...Be7 (14...f5 15.Qh5+–) 15.Qg3 Qg3 16.hg3 Rd8 (16...f5 17.Nf3+–) 17.Bd3 (17.g4 Kg7+–) 17...Nc6 (17...f5 18.Nf3+–) 18.Bh7 (18.Bh7 Kg7 19.Bc2+–; 18.Rh7?! Ne5 19.Bc2 Bb4 20.cb4 Rc8+–) 1–0. Rosner,Dirk – Klocke,Peter, Tiger SC, 2000.

6.Na3 Nc6 7.Qa1 Nf6 8.Nb5+/–.

6.e3 Bb7 7.Nf3 c6 8.Na3 e6 9.c3 Be7 10.c4 Nf6 (10...Bb4? 11.Bg7 (11.cb5?! Nf6=) 11...Ba3 12.Bh8+–) 11.c5 0–0 12.Bd3 (12.d4 Nd5=) 12...Ne8 (12...d6!? 13.Qb1 dc5 14.bc5 Nbd7–/+) 13.0–0 f5 14.h3 (14.Qb3 Nc7+=) 14...Na6 15.Bc3 (15.Qb3 Nec7 16.Nd4 Rf7=) 15...Nf6 (15...d6 16.cd6 Qd6 17.Qb3=+) 16.Nc2 (16.Qb3 Ne4 17.Be5 Bf6 18.Bf6 Qf6+=) 16...Nd5 Black plans f4 (16...d6 17.cd6 Bd6 18.Qb1=+) 17.Qa1= Bf6 18.Bf6 Rf6 19.Ncd4?? (19.Rb1!?=) 19...Nab4 (better 19...Ndb4!? 20.Be2 Nc5–+) 20.Be2=+ f4 (20...Qc7!?=+) 21.Qa7 Bc8 22.Ne5 (22.e4 Nc7=) 22...h6 (22...fe3 23.de3 Rf8 24.Rb1=+) 23.Ng4 (23.e4 Qc7 24.Qc7 Nc7=) 23...Rg6 (23...Rf8=+) 24.ef4 (better 24.Rb1 Na6 25.Bd3=) 24...Nf4–/+ 25.Bd1 (25.Rb1 Nbd5 26.Qb8–/+) 25...Nbd5 (25...h5 26.Ne3 Nbd3 27.Kh1–/+) 26.Bb3? (better 26.Bc2 Rg5 27.Nf3=+) 26...h5–+ 27.Ne5?? (better 27.Bd5 ed5 28.Qb8 hg4 29.Qf4 gh3 30.g3–+) 27...Rg2 (27...Ng2? 28.Ng6 Ngf4 29.Nf4 Nf4 30.Nf5 Nh3 31.Kh2+–) 28.Kh1 Rg5 (28...Qh4 29.Ndf3 Qh3 30.Nh2 Qh2) 29.Nef3–+ Rg6 30.h4 (30.Bc2 Rf6 31.Kh2 Qf8–+) 30...Rg4 31.Ng5 (31.Qb8 Rh4 32.Kg1 Rg4 33.Kh1–+) 31...Rh4 32.Kg1 (32.Nh3 Rh3 33.Kg1 Qg5) 32…Qg5 0–1. bazilishek (1650) – Akrapovik (1625), lichess.org, 2020.

6.e3 c6 7.Nf3 e6 8.c4 (8.Be2 Nf6 9.c3 Be7=) 8...bc4 (8...Nf6 9.cb5 Bb4 10.Qa4=) 9.Bc4 Bb4?? (better 9...Nf6 10.Qa4 Bb7=) 10.Bg7+– Bd2 1–0. DEFFM – GuestFKMT, freechess.org, 2016.

6.e3 c6 7.Nf3 Nf6 8.c4 g6 (better 8...e6!?=) 9.cb5+– cb5 10.Bb5 Bg7 11.Be2 0–0 12.0–0 Qb6 13.b5 d6 14.Nc3 Nbd7 15.Qb3 Rb8 16.Ra1 Nc5 17.Qd1 (better 17.Qa3+–) 17...Nd5? (17...Bf3 18.Bf3 Nd3 19.Qb1 Nb2 20.Ra6+–) 18.Nd5?? (better 18.Ra8 Ra8 19.Nd5+–) 18...Bd5+– 19.Bg7 Kg7 20.Nd4 e5 21.Bf3 (better 21.Nc2!?+–) 21...Bf3= 22.Nf3 Qb5 23.d4 ed4 (23...Nd3 24.de5 de5 25.Ne1=) 24.Nd4 (24.Qd4 f6+=) 24...Qb2 25.h3 (25.Qf1 Ne4 26.Rc1 Qa2=) 25...Ne4 26.Ne2 Nc3 (26...Qe5 27.Nf4=) 27.Nc3 Qc3 28.Qd4 (28.Ra6!?+=) 28...Qd4=+ 29.ed4 Rb4 30.Rd1 d5 31.Kf1 Rc4 32.Ke2 Kf6 33.Ke3 Ke6 34.Rd3 f5 35.Rb3 (35.g3 Rc6=) 35...Rc6 (35...f4 36.Kd3 Ra4 37.g4=) 36.Rb5 h6 37.Rc5 Rc5 (37...Ra6 38.Rc8=) 38.dc5 Ke5?? (better 38...g5=) 39.c6?? (better 39.f4 Kf6 40.Kd4+–) 39...Kd6–+ 40.c7 Kc7 41.Kd4 Kd6 42.f4 g5 43.fg5 (43.g3–+) 43...hg5 44.g3 (44.Kd3 Ke5 45.Ke3 d4 46.Kf3 f4–+) 44...Ke6 (44...g4 45.hg4 fg4–+) 45.h4 (45.Ke3 Ke5 46.h4–+) 45...gh4 (better 45...f4 46.hg5 fg3–+) 46.gh4 f4 47.Kd3 (47.Kd3 Kf5 48.Ke2–+; 47.h5–+). RichardSommer (2015) – zrosp (1890), lichess.org, 2020.

6.e3 e6 7.Bb5?? (7.Na3=) 7...c6 (7...Bg2 8.Bg7 Bg7–+ (8...Bh1?! 9.Bh8 Qg5 10.Ne2 Qb5 11.Ng3–+)) 8.Be2 (8.Bf1 Nf6+=) 8...d5 (8...Nf6!?+=) 9.c3 Nf6 10.Nf3 Bd6 11.0–0 0–0 12.d4 Nbd7 13.Nbd2 h6 14.Nb3 Nh7 15.Qc2 Ng5 16.Ng5 Qg5 17.g3 f5 18.Bc1 Qf6 19.f4 Nb6 20.Nc5 Bc5 21.bc5 Nd7 22.Bd2 Rb8 23.Rb1 Qd8 24.Qa2 Rb1+/– 25.Qb1 Qa5 26.Qc1 Bb7 27.c4 Qa7 28.cd5 ed5 29.Bd3 g6 30.Kf2 Nb8 31.Qb2 Na6 32.Ba6 Ba6+= 33.Ba5 Bb5 34.Bb6 Qa4 35.Qd2 Qa2?? 36.Qa2+– Kf7 37.Qa7 Kf6 38.Bd8 (38.Bd8 Ke6 39.Qe7) 1–0. Fournier,Frederic (1925) – javo298 (1880), Active (2/0), 2005.

6.e3 e6 7.Nf3 Nf6 8.Bb5 Bb4 9.0–0 0–0 10.d4 c6 (10...Be4 11.Nbd2=) 11.Bd3+= d6 12.c3 Ba5 13.Ba3 Bc7 14.Qc2 Re8 15.Nbd2 Nbd7 16.Bb2 e5 17.c4 h6 (17...ed4 18.Bd4 c5 19.Bf6 Nf6 20.Ra1=) 18.Ra1 d5 (18...ed4 19.Nd4 Ne5 20.Bf5+=) 19.cd5+– cd5 (19...Nd5 20.Bh7 Kh8 21.Bf5+–) 20.de5 (20.Ra8 Qa8 21.Qc7 e4=+) 20...Ne5 21.Bb5 Nf3 (21...Re7 22.Qf5 Nf3 23.Nf3+–) 22.Nf3 (22.gf3?! Bh2 23.Kg2 Rf8 24.Kh2 Qb8 25.f4 Qb5 26.Bf6 gf6 27.Rg1 Kh8+–) 22...Re4 (better 22...Re6!?+–) 23.Bf6+– gf6 24.Ra8! Qa8 A deflection (24...Bh2 25.Kh2 Qa8 26.Qc7+–) 25.Qc7 Qa1 26.Bf1 Rc4 27.Qd8 Kg7 28.Qd5 Rc1 The mate threat is Rxf1 29.Qd3 Rd1 30.Qe2 Qc1 (30...Qb1 31.Nd4+–) 31.Nd4 h5 (31...Re1 32.Nf5 Kh7 33.Qa6+–) 32.Nf5 Kg6 33.Ne7 (33.Ng3 Rd5+–) 33...Kg5 (33...Kg7 34.e4+–) 34.Qb5 Kh6 35.Nf5 Kg6 36.Ng3 h4 37.Qh5 Kg7 38.Qh4 (38.Qh4 Qb1 39.e4+–) 1–0. onur604 (2320) – Ostwind (2175), lichess.org, 2020.

3.a4 c6

4.ab5 cb5 5.e3 Bb7 6.Nf3 d6 7.c4 Qb6 8.cb5 ab5 9.Ra8 Ba8 10.Nc3 Nc6?! (10...Bc6 11.Nd4 Bb7+–) 11.Bb5 Kd8 (11...e6 12.Qa4 Bb7 13.Nd4+–) 12.Qa4 Bb7 (12...Na7 13.Be8 Nf6 14.Ng5+–) 13.Nd5 Qa7 14.Qc2 (14.Bc6?! Qa4 15.Ba4 Bd5+–) 14...e6 15.Bc6 (15.Ng5!? Nh6 16.Bc6 ed5+–) 15...ed5 16.Ng5 (16.0–0 Bc6 17.Qc6 Ne7 18.Qd6 Ke8+–) 16...Nh6 (16...Bc6 17.Qc6 h6+–) 17.0–0 Be7 (17...f6+–) 18.Bd4 Qb8 19.Bb6 Qc7 20.Bb7 Qb6 (20...Ke8 21.Qc7 Bg5 22.Ra1 Nf5 23.Ra8 Bd8 24.Qd8) 21.Qc8 1–0. GuestLVKD – GuestCYJY, freechess.org, 2020.

4.ab5 cb5 5.e3 Bb7 6.Nf3 d6 7.c4 bc4 8.Bc4 e6 9.0–0 d5 10.Bb3 (10.Bd3 Nf6 11.b5 ab5 12.Ra8 Ba8 13.Bb5 Bc6 14.Bc6 Nc6+–) 10...Nf6+= 11.Ba4 Bc6?? (better 11...Nbd7+=) 12.Bc6+– Nc6 13.Qa4 Qd7 14.b5 Na7 (14...Nb4 15.Ne5 Qd8+–) 15.Qa6 Qb5 (15...Bc5 16.Rc1 Ne4+–) 16.Qb5 Nb5 17.Ra8 Ke7 18.Nc3 Nc3 (18...Nd6 19.Ba3 e5 20.Nb5+–) 19.Ba3 (19.Ba3 Kd7 20.dc3 Ba3 21.Rh8+–) 1–0. DEFFM – GuestNWCF, freechess.org, 2018.

4.ab5 cb5 5.e3 Bb7 6.Nf3 Bf3 7.Qf3+– Nc6 8.c3 Qb6 (8...Nf6 9.d4+–) 9.Bd3 (better 9.c4 bc4 10.Na3+–) 9...Ne5?? (better 9...Rc8+=) 10.Qa8+– Qd8 11.Qd8 Kd8 12.Be2 Nf6 (12...Nc4 13.Ra6 Kc7 14.Ra2+–) 13.Ra6 Nc4 (13...Kc7 14.Na3 Kb7 15.Bb5+–) 14.Na3 Nb2 15.Ra8 Kc7 16.Nb5 Kb7 17.Ra2 Nc4 (17...e6 18.Rb2 Ne8 19.Ra2+–) 18.Bc4 e6 (18...d5 19.Bd3 e5 20.Ra7 Kb8 21.0–0+–) 19.0–0 d5 20.Ra7 Kb6 21.Bd3 Ne4 (21...Nd7 22.Rd7 Kc6 23.Ra7 Bb4 24.cb4 Ra8 25.Rc1 Kb6 26.Ra8 Kb7 27.Rcc8 f5 28.Nd6 Kb6 29.Ra6) 22.Rfa1 Nd2 (22...Nc5 23.bc5 Kc5 24.R1a6 Bd6 25.Nd6 d4 26.ed4 Kd5 27.Be4) 23.R1a6 1–0. GuestMLVY – GuestVLMC, freechess.org, 2020.

4.e3 Bb7 5.Nf3 d5 6.Be2 Qc7 (6...e6 7.Bd4+=) 7.Be5 Qd8 8.0–0 Nd7 9.Bb2 (9.d4 e6 10.c3 Ne5 11.Ne5 Bd6+=) 9...e6 10.ab5 cb5 11.d3 Bd6?? (better 11...Ngf6 12.c3 Bd6=) 12.Bg7+– 1–0. guest217 – guest798, chessclub.com, 2018.

4.e3 Bb7 5.Nf3 e6 6.Be2 Nf6 7.c3 d5 8.0–0 Nbd7 (8...Bd6 9.Nd4=) 9.ab5 (9.d3 Bd6=) 9...cb5= 10.d3 (10.Nd4 Bd6=) 10...Be7 (10...Bd6 11.Nd4=) 11.Nd4 (11.Nbd2 a5+=) 11...Ne5 (11...0–0 12.Qd2=) 12.Nd2 0–0 13.f4 Nc6 14.N2b3 Nd4 15.Nd4 Qc7 16.Qd2 (16.Qe1 a5=) 16...Bd6 (16...Rfc8 17.Bf3=) 17.Qe1+= h6 (17...Rfe8 18.Qg3+=) 18.Qg3 (better 18.Qh4+=) 18...Bc8? (better 18...Rfe8+=) 19.Nb5!+– ab5 (19...Qc6 20.Nd6 Qd6 21.c4+–) 20.Ra8 Qb7 (20...e5 21.c4 ef4 22.ef4 Bb4 23.cb5+–) 21.Rfa1 Kh7 22.R1a7 (22.R1a5 Bc7 23.R5a7 Qc6+–) 22...Qc6 23.c4! dc4 (23...bc4 24.Bc3 Decoy; 23...dc4 24.Bf3 Combination) 24.Bf6 gf6 25.Bh5 Rg8 (25...Bb7 26.Rf8 Bf8+–) 26.Rf7 (26.Rf7 Kh8 27.Bg6+–) 1–0. DEFFM – lionjoshi, freechess.org, 2018.

3.e3 Nc6

4.a3 a5 5.c3 (5.Bb5!? Bb7 6.ba5 Ra5 7.Be2+/–) 5...Bb7 (5...Rb8 6.d4=) 6.Nf3+= d5 (better is 6...ab4!? 7.ab4 Ra1 8.Ba1 e5+=) 7.Bb5+– Qd6 8.0–0 h5 9.d4 Nf6 10.Nbd2 Ne4 (10...ab4 11.cb4 Nd7 12.Qc2+–) 11.Qc2 (11.Ne4 de4 12.Ne5 f6+–) 11...f5 (11...Nd2 12.Nd2 h4 13.h3+–) 12.Ne5 (better is 12.Ne4 fe4 13.Ne5+–) 12...Rg8? (12...Nd2 13.Qd2 g5 14.Qc2+–) 13.Nc6 (better is 13.Ne4 fe4 14.c4+–) 13...g5?? (13...Bc6 14.Ne4 fe4+–) 14.Na5 Kf7 (14...c6 15.Ne4 fe4 16.Nb7+–) 15.Nb7 Qb6 16.Ne4 de4 17.Bc4 e6 18.Nc5 Bc5 19.dc5 Qc6 20.Qb3 g4 21.g3 Rh8 22.Be6! Qe6 23.Qe6 Ke6 24.c4 Rh6 25.Rfd1 h4 26.Rd2 hg3 27.fg3 Rg8 28.Rad1 Kf7 29.Rd7 Kg6 30.Rc7 Kg5 31.b5 Rgg6 32.b6 Rh5 33.Rd2 Rgh6 34.b7 Rh8 35.Rc8 Rc8 36.bc8Q (36.bc8Q Rh7 37.Qd8 Kh5 38.Rd6 Re7 39.Qe7 f4 40.Qe5 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

4.a3 Bb7 5.Nf3 a5 6.c4 (6.Bb5 ab4 7.Bc6 Bc6 8.ab4 Ra1 9.Ba1 e6+–) 6...ab4 7.cb5 Na7 8.ab4 Nb5?? (better 8...Nf6+=) 9.Bb5+– Ra1 10.Ba1 c6 11.Bc4 e6 12.0–0 Bb4 (12...Nf6 13.Bc3 Be7+–) 13.Bg7 Ne7 14.Bh8 d5 15.Bb3 (15.Be2 Ng6 16.Qb3 Qb6+–) 15...Qd6 (15...Ng6 16.Bc3 Bd6 17.Bc2+–) 16.Be5 Qc5 17.Bd4 (17.d4 Qb5+–) 17...Qb5 (17...Qa5 18.Ne5 Qc7 19.Qh5+–) 18.Nc3 (better 18.Ba4 Qa6+–) 18...Qd3 (18...Qa6 19.Qc2 c5 20.Na2 cd4 21.Nb4+–) 19.Ne5 Qf5 (19...Qa6 20.Qh5 Ng6 21.f4+–) 20.Bc2 Qg5 21.Qf3 (better 21.Qb1 c5 22.Ba4 Bc6 23.Nc6 Kf8 24.Ne7 Ke7 25.Bc5 Bc5+–) 21...f5 (21...f6 22.Ng4 f5 23.Nf6 Kd8 24.Na4+–) 22.Nd3 (22.Nd3 Bd6 23.Be5 Be5 24.Ne5+–) 1–0. AhmedSultanov (1620) – Olegoleg888888 (1660), lichess.org, 2019.

4.a3 d5 5.Nf3 Bf5 6.d4 Kd7 (6...e6!?=) 7.Bd3 a5?? (better 7...Bd3 8.cd3 e6+=) 8.Bf5+– e6 9.Bh3 (better 9.Bd3 Na7+–) 9...ab4 10.ab4 Nb4 (10...Ra1 11.Ba1 Bb4 12.Bc3+–) 11.Ne5 Ke8 12.Ba3 (12.Na3 Qb8+–) 12...Bd6 13.0–0 Nf6 (13...Ne7 14.Nc3 c6 15.Qf3+–) 14.Nd2 (14.Nc3 Nc2 15.Qc2 Ra3 16.Nb5 Ra1 17.Ra1 Be5 18.de5 Nd7 19.Nc7 Ke7+–) 14...c5 15.Bb4 cb4 16.Qe2 Kf8 17.Qb5 Ra1 (17...Rb8 18.Qd3 Qc7 19.Ndf3+–) 18.Ra1 Ne8 19.Nd7 Kg8 (19...Ke7 20.Ra7+–) 20.Nc5 (better 20.Qc6 Qc7 21.Ra8 Bh2 (21...Qc6?? 22.Re8 Bf8 23.Rf8) 22.Kh1 g6 (22...Qc6 23.Re8) 23.Nf6 Kg7 24.Qe8 Re8 25.Ne8 Kh6 26.Nc7 Bc7+–) 20...Nc7 (20...h6 21.Ra7 Nc7 22.Qb4+–) 21.Qb4 h6 22.Ndb3 Qc8 (22...Kh7 23.c4+–) 23.Qb6 Kh7 (23...Ne8+–) 24.Qd6 Rd8 (24...Nb5 25.Qb6 Qb8 26.Qa6+–) 25.Qe5 (better 25.Qe7 Qb8+–) 25...Qa8 (25...Nb5+–) 26.Ra8 (better 26.Qc7 Qc8 27.Qf7 Rf8 28.Qe6 Qe6 29.Be6 Rd8+–) 26...Ra8 27.g3 (27.Qc7 Kg6 28.Bf5 ef5 29.Qc6 Kh5 30.Qa8 Kg6 31.Nd7 f4 32.Nf8 Kg5 33.Qd5 f5 34.ef4 Kf4 35.Ne6 Kg4 36.Qf3 Kh4 37.Qh3) 27...Ra1 28.Na1 (28.Na1 Kg6 29.Bf1 Na6 30.Bd3 f5 31.Qe6 Kh7 32.Bf5 g6 33.Qg6 Kh8 34.Qh7) 1–0. GuestNGXK – GuestLVTD, freechess.org, 2017.

4.a3 e5 5.c4 bc4 6.Bc4 Bd6 7.Nf3+= Nf6 8.Nc3 0–0 9.0–0 Bb7 10.Ng5 Ne7 11.Qb3 Qe8 12.f3 h6 (12...Ng6 13.Nge4+=) 13.Nge4+– Be4 (13...Ne4 14.Ne4 Nc8 15.Nc5 Bc5 16.bc5+–) 14.Ne4 Ne4 15.fe4 Ng6 16.Rf5 Ne7? (better 16...a5!?+–) 17.Rf7!+– Rf7 18.Rf1 Nf5?? (18...Kh7 19.Rf7 a5+–) 19.Rf5 (19.Bf7?! Qf7 20.Qf7 Kf7 21.Rf5 Ke6+–; 19.ef5?! c6+–) 19...Kh7 (19...Kh8 20.Rf7 a5 21.Qd1+–) 20.Rf7 c5 (20...Qd8 21.d4+–) 21.Qd3 Qb8 (21...Bf8 22.bc5 Bc5 23.Qd7 Qd7 24.Rd7+–) 22.Rd7 Bf8 (22...a5 23.Rd6 ab4 24.ab4 cb4 25.Be5 Qe8 26.Bg7 Qg6 27.Bb2 Ra6 28.Rd7 Qf7 29.Rf7 Kg6 30.e5 Kg5 31.Qf5 Kh4 32.g3) 23.Qd5 Ra7 24.Qg8 Kg6 25.Qf7 Kh7 26.Ra7 Qd6 27.Ra6 (27.Qf5 Qg6 28.Qf8 Qg4 29.Qg8 Kg6 30.Bf7 Kg5 31.Qd8) 27...Qe7 (27...Be7 28.Be5 Bf6 29.Bf6 Qf8 30.Qf8 Kg6 31.Qg7 Kh5 32.g4) 28.Qg8 1–0. Karl – Kgw, internet private, 2018.

4.a3 e5 5.d4 ed4 6.ed4 d5 7.Qe2 Be7 (7...Be7 8.Nf3 Nh6=). Heat – Adonis, Live Game Caissa's Web, 2004.

4.a3 e5 5.d4 ed4 6.ed4 d5 7.Nf3 Nf6 8.Nc3 (8.Bd3 Bd6=) 8...Bd6=+ 9.Bd3 0–0 10.0–0 Re8 (10...Bg4 11.Re1=+) 11.h3= h5 (11...Be6 12.Re1=) 12.Bc1 g6 13.Bg5 Be7 14.Qd2 Nh7 15.Be7 Re7 16.Rfe1 Re1 17.Re1 Qf6? (better is 17...Nf6+/–) 18.Nd5 Nd4?? (18...Qd8 19.c4 bc4 20.Bc4 Be6+–) 19.Nf6 Nf6 20.Nd4 Bb7 21.Re7 (21.Qh6 Re8 22.Ne6 Re6 23.Re6 fe6 24.Qg6 Kf8 25.Qf6 Ke8 26.Bg6 Kd7 27.Qf7 Kd6 28.Qf8 Kc6 29.Qe7 Bc8 30.Be4 Kb6 31.Qc5) 21...Rc8 22.Qf4 (22...Bd5 23.Qf6 Rd8 24.Re5 Be4 25.Qd8 Kh7 26.Qf8 Bd3 27.Qf7 Kh6 28.Qf8 Kh7 29.Re7) 1–0. Steingraeber,Barbara – Guggenberger,Simon, remoteschach.de, 2003.

4.a3 Nf6 5.c4 bc4 6.Bc4 g6 (6...e5 7.Qc2=) 7.Nf3 Bb7 8.0–0 Bg7 9.d4 Ne4 (9...0–0 10.Nc3+=) 10.Nbd2 (10.Qb3 0–0+–) 10...Nd2 11.Qd2 Nb8 12.a4 White intends b5 (better 12.d5!? Bb2 13.Qb2+–) 12...Bf3= 13.gf3 c6 14.b5 cb5 (14...e6!?=) 15.ab5+= a5 16.Bd5 (16.Ra4 d5 17.Bd3 e6+–) 16...Ra7+= 17.f4 e6 18.Be4 d5 19.Bd3 Qh4 20.Kh1 0–0 21.Ra5 Ra5 1–0. GuestRMRY – GuestJZRJ, freechess.org, 2017.

4.a4 Bb7 5.Nf3 Nb4 6.Be2 (6.ab5 Be4 7.Na3 ab5 8.Bb5 c6=) 6...c6 (6...Nf6 7.0–0=) 7.0–0 Nf6 8.d3 e6 9.e4 c5 10.Qd2 Nc6 (10...Be7 11.e5 Nfd5 12.ab5 ab5 13.Ra8 Ba8 14.Na3=) 11.ab5 ab5 12.Ra8 Qa8 13.e5 Ng8 (13...Nd5 14.c4 bc4 15.dc4=) 14.Nc3+= b4 15.Ra1 Qb8 16.Ne4 Nh6 17.Ng3 (17.c3 Be7= (17...Ne5? 18.Ne5 Qe5 19.cb4+–)) 17...Be7 18.Nh5 0–0?? (better 18...Nf5 19.d4 Ncd4 20.Nd4 Nd4 21.Bd4 cd4 22.Qd4 Qc8 23.Ng7 Kf8=+) 19.Nf6+– Bf6 20.ef6 Nf5 (20...Rc8 21.g4 (21.fg7?! Nf5+–) 21...Ng4 22.Qg5+–) 21.g4 Nd6 (21...e5 22.gf5 Qd6 23.fg7 Re8+–) 22.Qg5 g6 (22...Ne8 23.fg7 f6 24.gf8Q Kf8 25.Qc5 d6+–) 23.Qh6 Ne8 24.Ng5 (24.Ng5 Nf6 25.Bf6 Qh2 26.Kh2 Nd4 27.Qh7) 1–0. DEFFM – GuestZTDM, freechess.org, 2019.

3.e3 d6

4.c4 bc4 5.Bc4 d5 6.Be2 e6 7.Bf3 (7.Nf3 Nf6+=) 7...a5 8.Qa4 Bd7 9.b5 c6 10.Be2 cb5 11.Bb5 Bb5 12.Qb5 Qd7 13.Qd7 Nd7 14.Nf3 Nc5 15.0–0 Ne7 16.Nc3 Nc6 17.Nb5 (17.Rfc1 Nd3 18.Rc2 Ncb4–+ (18...Nb2?! 19.Rb2 Bb4 20.Rab1=)) 17...Rc8 (17...Rb8 18.Nbd4 Rb2 19.Nc6–/+) 18.d4 (18.Rac1 Nd3 19.Rb1 e5–/+) 18...Nd3 19.Bc3 Ncb4 (19...Na7 20.Na7 Rc3 21.Rfd1=+) 20.a3 Na6 (better is 20...Nc2 21.Rad1 Na3 22.Rd3 Nb5 23.Ba5 Nd6=) 21.Ba5+/– Rb8 22.a4 Be7 23.Rfd1 Nb2 24.Rdb1 Nc4 25.Nc7 Kd7 (25...Kf8 26.Na6 Ra8+/–) 26.Rb8 (better is 26.Na6 Rb1 27.Rb1 Na5 28.Ne5 Ke8 29.Rb8 Bd8 30.Rd8 Kd8 31.Nf7 Ke7 32.Nh8+–) 26...Rb8 27.Na6 Ra8 28.Nc5 Bc5 29.dc5 Ra5 30.g3 (30.Ng5 Kc6+=) 30...Rc5 31.Nd4 (31.Ng5 d4 32.Nf7 de3 33.fe3 Ke7=+ (< 33...Ne3 34.a5=)) 31...Ra5 32.Kg2 Nb6 (32...Kd6 33.Nb3 Ra6 34.a5=+) 33.Nf3 (33.Nb3!? Ra7 34.a5=) 33...Ra4 34.Rb1 Nc4 35.Rb7 Ke8 36.Ng5 Nd6 37.Rb6 h6 (37...Ke7 38.Nh7 e5 39.Rc6–/+) 38.Rd6 (38.Ne6!? fe6 39.Rd6=+) 38...hg5–/+ 39.Rb6 Ke7 40.f4 (40.Rb7 Kf6–/+) 40...gf4 41.gf4 Ra2 42.Kg3 Kf6 43.h4 Ra4 44.Kf3 d4 (44...Ra3 45.Ke2–/+) 45.e4 (45.ed4 Rd4 46.h5 Kf5 47.Rb5 Rd5–/+) 45...Ra3 46.Kg4 d3 47.e5 Kg6 (47...Ke7 48.Rb7 Ke8 49.Rb8 Kd7 50.Rb7 Kc6 51.Rb2–+) 48.h5? (better is 48.f5!? Kh7 49.fe6 fe6 50.Re6+=) 48...Kh7–/+ 49.Rd6 g6 (better is 49...Kh6!?–/+) 50.hg6= Kg6 51.f5 Kg7 52.f6 (52.fe6 fe6 53.Re6 d2=) 52...Kg6 53.Kf3? (better is 53.Rd4=) 53...d2 54.Ke2 (54.Kf4 Ra2–/+) 54...Ra2 (54...Ra5 55.Kd1–+) 55.Kd1 (55.Rd4 Kf5 56.Rd7 Ke5 57.Rf7 Kf5–/+) 55...Kf5 (55...Ra5!? 56.Kd2 Re5 57.Rb6–+) 56.Rd7–/+ Ke5 57.Rf7 Kf5 58.Rf8 e5 59.f7 Kf6 ½–½. MasterofDisaster – BeCarefool, Live Game Caissa's Web, 2004.

3.e3 e5

4.c4 Bb4 5.Be5+– Bb7?? (5...f6 6.cb5 ab5 7.Qg4=) 6.Nf3 (better 6.Bg7 Bg2 7.Bg2+– (7.Bh8?! Bh1 8.cb5 Nf6+–)) 6...f6+= 7.Bb2 Qe7 (7...bc4!? 8.Bc4 d5+=) 8.a3+– Bc5 9.cb5 ab5 10.Bb5 Ba6 11.a4 Bb5 12.ab5 Ra1 13.Ba1 Qe3?? (better 13...Nh6+–) 14.fe3 Ne7 15.Qb3 d5 (15...Bd6 16.0–0+–) 16.d4 (16.Nc3 Bd6+–) 16...Bb6 17.Nc3 0–0 18.Nd5 Nd5 19.Qd5 Kh8 20.0–0 h6 21.Nh4 Re8 22.Ng6 (22.Rf6 Nd7 23.Qd7 Ra8 24.Nf5 Ra1 25.Kf2 Ra2 26.Kf3 Rf2 27.Kf2 gf6 28.Qg7) 22...Kh7 23.Qf5 (23.Rf6 Nd7 24.Qd7 Re3 25.Nf8 Kh8 26.Rg6 Bd4 27.Bd4 Re1 28.Kf2 Re2 29.Ke2 Kg8 30.Qg7) 23...Kg8 24.Kh1 (better 24.e4 Kf7+–) 24...Re3 25.Qc8 Kh7 26.Nf8 Kg8 27.Qb8 Kf7 28.Nh7 (better 28.Nd7 Re8 29.Qb7+–) 28...Kg6 29.Nf8 (29.Qg8 Re8 30.Rf6 Kh5 31.Qf7 g6 32.Qg6 Kh4 33.Rf4) 29...Kf7 30.d5 (better 30.Nd7!? Re8 31.Qb7 Kg8+–) 30...Re8 31.Rf6! gf6 32.Qe8! Ke8 33.Ne6 Kd7 34.Bf6 Kd6 35.Nf4 Kc5 (35...Be3 36.g3 Kc5 37.Bg7+–) 36.h4 Kb5 37.g4 (better 37.Bg7 Kc4+–) 37...Kc4 (37...Be3 38.Ne6 Kc4 39.Nc7+–) 38.g5 hg5 39.hg5 Be3 (39...Bc5 40.g6 Bf8 41.Ne6+–) 40.g6 Bf4 41.g7 Kd5 (41...Bd6 42.g8Q+–) 42.g8Q Kc6 43.Qe6 (better 43.Qc4 Kd7 44.Qf4 c5+–) 43...Bd6 44.Kg2 Kb7 (44...Kc5 45.Bb2+–) 45.Qd7 (better 45.Qd5 Kb8+–) 45...Bf4 (45...Kb6+–) 46.Kf3 Bh2 47.Ke4 Kb6 (47...Bg1 48.Qd5 Ka6 49.Qc6 Bb6 50.Kd5 Ka7 51.Bd4 Kb8 52.Bb6 cb6 53.Qe8 Kb7 54.Qe7 Ka6 55.Kc6 b5 56.Qa3) 48.Bd8 Bd6 (48...Bg3 49.Qd3 Kc6 50.Qg3 Kb7 51.Qc7 Ka8 52.Qc6 Kb8 53.Bc7 Ka7 54.Qb6 Ka8 55.Qb8) 49.Kd5 (49.Qd6 Kb5 50.Bc7 Ka4 51.Qc5 Kb3 52.Qb5 Kc2 53.Be5 Kd2 54.Qb2 Ke1 55.Ke3 Kd1 56.Qd2) 49...Bg3 50.Qc8 (50.Qc6 Ka7 51.Qb5 Bf2 52.Qa5 Kb7 53.Qc7 Ka8 54.Kc6 Bd4 55.Qb7) 50...Bd6 (50...Bf2 51.Qc7 Ka6 52.Kc6 Bd4 53.Qa5) 51.Qb8 Ka6 (51...Ka5 52.Qb7 Ka4 53.Kc4 c5 54.Qb3) 52.Bc7 (52.Kc6 Bc5 53.Qb5 Ka7 54.Qb7) 52...Bg3 (52...Bc7 53.Qc7 Kb5 54.Qb7 Ka5 55.Kc4 Ka4 56.Qb4) 1–0. GuestTWTH – GuestSMQJ, freechess.org, 2017.

4.c4 bc4 5.Be5 A) 5...Bb4?? 6.Bg7 (6.Bc4?! Nf6+=) 6...Ne7 7.Bh8+–; B) 5...d5=.

4.Be5 Bb4?? 5.Bg7+– Nf6 6.Bh8 Ng4 (6...d5+–) 7.Qg4 d6 (7...Nc6 8.Nc3 d5 9.Qg8 Ke7 10.Qg5 Ke6 11.Nf3 Qg5 12.Ng5 Kd6 13.Nf7 Ke7 14.Nh6+–) 8.Qg8 (better 8.Qb4 Bf5 9.a4 ba4 10.Qa4 Qd7 11.e4 Qa4 12.Ra4+–) 8...Ke7 9.Bf6! Kd7 (9...Kf6 10.Qd8 Double attack (10.Qd8 Deflection)) 10.Qd8 Kc6 11.Qc8 1–0. GuestDHVS – jbenitol, freechess.org, 2017.

3.e3 e6

4.a3 Nf6 5.c4 bc4 6.Bc4 Bb7 7.Nf3 Be7 8.0–0+= 0–0 9.d4 (9.Nc3 a5 10.b5 d5=) 9...d5 (9...a5 10.b5=) 10.Bd3+= c6 11.Nbd2 Nbd7 (11...a5 12.ba5 Ba6 13.Nb3+=) 12.Nb3+/– Rb8 13.Na5 Qb6 14.Rc1 Rfc8 15.Ne5 (15.Qe2 Ra8+/–) 15...Ne5+= 16.de5 Nd7 17.Bd4 (17.Qh5 h6+=) 17...Qc7 (better is 17...c5!? 18.Qa4 Bc6 (worse is 18...cd4 19.Qd7 Rc1 20.Rc1 de3 21.Qe7 ef2 22.Kf1+–) 19.bc5 Bc5 20.Nc6 Qc6 (20...Rc6?? 21.Rb1+–) 21.Qa6 Rb6+=) 18.Qh5 g6 19.Qe2 Ra8 20.f4 (20.e4 c5+/–) 20...Bf8 (20...c5 21.Qd2+= (worse is 21.Nb7 Qb7 22.bc5 Nc5=)) 21.Rf3 Bg7? 22.Rh3 Nf8 23.g4 Rcb8 24.Qg2 Rc8 25.Qg3 Qd7 26.f5! ef5 27.gf5 Rab8 28.f6 Bh8 29.Qh4 1–0. HaB” – Fournier,Frederic, Partie evaluee, 2m + 1s, 2008.

4.a3 Nf6 5.Nf3 d5 6.d3 (6.Be2 Bd6=) 6...Be7 7.c4 bc4 (7...0–0 8.Nc3=) 8.dc4 dc4 (8...a5 9.b5=) 9.Bc4 (9.Qd8!? Bd8 10.Nbd2+=) 9...Qd1= 10.Kd1 Bb7 11.Ke2 Nc6 (11...Nbd7 12.Rc1=) 12.Nc3 Rd8 13.Rhd1 0–0 14.Rd8 Rd8 15.Rd1 Rd1 16.Kd1 (16.Nd1 Bd6+=) 16...Kf8 (16...Ng4!?=) 17.Ke2 Ke8 18.Nd2 (18.Bd3 e5+=) 18...Bd6 (18...Ne5 19.f3=) 19.h3 Ne5 20.Bb3 (better is 20.f3=) 20...Bg2–/+ 21.h4 Bb7 (21...Ng6 22.Bc4 Bb7 23.Bd3 Nh4 24.b5 ab5 25.Nb5–/+) 22.f3 c6 23.e4 Ned7 24.Nc4+= Bf4 25.Na5= Ba8 26.Bc4 Nh5 27.Kf2 Bg3+= 28.Kg2 Bh4 29.Kh3 Bf2 30.Nd1 Bb6 31.Nb3 Nhf6 32.Ba6+= Kf8 33.Bd4 c5 34.bc5+= Bc7 35.Bb5 Ne5 36.Be5 Be5 37.Ne3 Bb2? 38.a4 Ke7 39.Nc4+– Bc3 40.Nba5 White prepares the advance c6 40...Bb4 41.c6 Kd8= 42.Nb7 Kc7 43.Nba5 Ne8 44.Nb3 Bc6 45.Nd4 Bb5+= 46.ab5 Bc5 47.Nc6 Nd6 48.Nd6 Bd6 49.Kg4 Kb6 50.Nd8 Kb5 51.Nf7 Kc5 52.Ng5= h6?? 53.Ne6+– Kc6 54.Ng7 Bf8 55.Nf5 Kd7 56.Kh5 Ke6 57.Nh6 Ke5 58.Nf7 Kf4 59.e5 Kf3 60.e6 Kf4 61.Kg6 Be7 62.Kg7?? Kf5= 0–1. Fournier,Frederic (1790) – Forsgren (1680), Active, 2006.

4.a4 Bb7 5.ab5 ab5 6.Qh5 (6.Ra8 Ba8 7.Nf3 A) 7...Bb4 8.Bg7 (8.Bb5?! Nf6=) 8...Bd5 9.Bh8+–; B) 7...Bc6=) 6...Ra1 (6...Bb4? 7.Qb5 (7.Bb5?! Ra1 8.Ba1 Bg2 9.Bg7 Nf6=) 7...Ra1 8.Ba1 Bd2 9.Nd2+–) 7.Ba1 c6 (7...Na6 8.c3=) 8.Nh3 (8.Qf3 d5= (8...Bb4 9.Bg7 d5 10.Bh8+–)) 8...Nf6 (8...Bb4? 9.Bg7 Nf6 10.Qf3+–) 9.Bf6 (9.Qf3 Bb4 10.Bb5 d5=) 9...Qf6+= 10.c3 Na6 (10...Be7 11.d4+=) 11.d4= Nb4 (better is 11...Be7!?=) 12.cb4+/– Bb4 13.Nd2 0–0 14.Bd3 Threatening mate... how? 14...h6 15.Ke2 Bd2 (15...d6 16.Ne4 Qe7 17.Rb1+/–) 16.Kd2 c5 17.Rb1 (17.Nf4 cd4 18.Rb1 Ra8 19.Qb5 de3 20.Ke3 Rb8+/–) 17...cd4 (17...Bg2 18.Nf4 (worse is 18.Bb5 Bh3 19.Qh3 Qf2 20.Kd1 cd4+=) 18...c4 19.Ng2+–) 18.e4 (18.Nf4+/–) 18...Ra8 (better is 18...Bc6!?+/–) 19.Qb5+– (19.Rb5?! Ra2 20.Ke1 Ra1 21.Ke2 Ra2 22.Kf1 Ra1 23.Rb1 Rb1 24.Bb1 e5+/–) 19...Bc8 20.Ke1 (20.e5 Qe7+–) 20...g6 (20...e5 21.Qd5 Ra3 22.Rb8 Rd3 23.Rc8 Kh7 24.Qd7+–) 21.Ng1 (21.e5 Qh4+–) 21...Kg7 (21...Ba6 22.Qa5 Qf4 23.Nf3+–) 22.Nf3 (22.e5 Qf4 23.g3 Qg4+–) 22...d6?? (22...Ba6 23.e5 Qf3 24.gf3 Bb5 25.Rb5 Ra1 26.Rb1 Rb1 27.Bb1 g5+=) 23.Qc6 (23.Qc6 Ra2 24.Qc8+–) 1–0. Bulcourf,Carlos (2295) – Gallardo,Retortillo Enrique, San Fernando op, 1993.

4.a4 c6 5.ab5 White fights for the Initiative cb5 6.Qf3 Nc6 (6...Qc7 7.Qa8 Bb7 8.Ra6 Ba8 9.Ra8 Qc2 10.Rb8 Ke7 11.Nc3 Qb2 A) worse 12.Bb5 Qa1 (12...Qb4?! 13.Rb7=) 13.Ke2 Qa7 14.Rf8 Kf8–/+; B) 12.Nf3=) 7.Bb5+= Bb7 (7...ab5 Exploits the pin 8.Ra8) 8.Ba4 (8.Bc6 Bc6 9.Qg3 Nh6+=) 8...f6 (8...Qh4 9.Bc3+=) 9.Nh3 (9.c3!?+–) 9...Bb4+= (9...Nb4?? 10.Qb7 Rb8 11.Qe4+–) 10.Nf4 Qc7? (better 10...Qe7=) 11.Qh5+– g6? (11...Kf8 12.Ng6! hg6 13.Qh8 Ne5+–) 12.Ng6! hg6 A pinning theme 13.Qh8 A pinning theme 13...Kf8 (13...0–0–0 14.Qh4 Be7 15.Qh7+–) 14.Bf6 d5 15.0–0 (15.Ra2 Qf7 16.Bg5 a5+–) 15...Qf7 16.Bb2 a5 17.f4 Be7 18.Be5 Bf6 19.Bf6 (19.Qh3 Nge7+–) 19...Qf6 20.Qf6 Nf6 21.Nc3 Nb4 22.Nb5 Ke7 23.c3 Nd3 (23...Nc6 24.Rfb1+–) 24.Rfb1 Nc5 25.Bc2 Nfe4 26.d4 Nd7 27.Be4 de4 28.c4 Nb6 (28...Bc6+–) 29.Nc3 Ra6 (29...Bd5 30.Rb6 Bc4 31.Ne4+–) 30.c5 Nd5 31.Rb7 Kf6 (31...Kd8 32.Nd5 ed5+–) 32.Nd5 ed5 33.Rb6 Rb6 34.cb6 (34.cb6 Kg7 35.Ra5 Kh7 36.b7 Kg7 37.b8Q g5 38.Ra6 gf4 39.Qc7 Kf8 40.Ra8) 1–0. DEFFM – GuestRSBR, freechess.org, 2020.

4.Nf3 Bb4?? 5.Bg7 Bb7 6.Bh8+–.

4.Nf3 f6 5.c4 Bb4 6.cb5 a5 (6...Bb7 7.a3 Be7 8.Nc3=) 7.a4 (7.Bd3 Ne7+/–) 7...c6 8.Be2 Ne7 9.0–0 c5 10.d4 0–0 11.dc5 Bc5 12.Ba3 Bb6 13.Qd6 Bc7?? (better is 13...Rf7+/–) 14.Qe7+– Qe7 15.Be7 Rf7 (15...Re8 16.Rc1 Ra7 17.Ra3 Re7 18.b6+–) 16.Bc5 (better is 16.Rc1 Re7 17.Rc7 Re8+–) 16...d6 17.Bd4 e5 (17...Bb7 18.Rd1+–) 18.Bb2 (18.Bc4 ed4 19.Rc1 Bb6 20.Bf7 Kf7 21.Rc8 de3 22.fe3 Be3 23.Kf1 g5+–) 18...Bg4 (18...Be6 19.e4+–) 19.Rc1 e4 20.Nd4 Bc8 21.b6 Bb6 22.Rc8 Rf8 23.Rf8 Kf8+– 24.f3 Nd7 25.Ba3 Ke7 26.Nf5 Kf7 27.Nd6 Kg8 28.Bc4 Kf8 29.Ne4 Ke8 30.Nd6 Kd8 31.Kf2 g5 32.Nc3 h5 33.Rd1 Bc7 34.Ncb5 Bb6 35.Bf7 Ne5 36.Bh5 Nd7 37.Bg4 Ne5 38.Nf7 Ke8 39.Ne5 fe5 40.Bh5 1–0. nordlicht (1955) – robert111, gameknot.com, 2012.

4.Nf3 Nf6=.

4.Nf3 h6 5.c4 Nf6 6.a3 c5 7.cb5 ab5 8.bc5 Bc5 9.Bb5 0–0 10.Nc3 Qb6 11.Qc2 Ba6 12.Be2 Be2 13.Ne2 Nc6 14.Bf6 gf6 15.Qc3 e5 16.Ng3 Qb5 17.Nh4 Kh7 18.Qc2 Kh8 19.Nhf5 Ba3 20.Nh6 Bb2 21.Rb1 Ra1 22.Ra1 Ba1 23.f3 e4? (23...Nb4 24.Qf5 Nd3 25.Ke2 Nc5 26.Kd1 Qa4 27.Ke1+–) 24.Ne4 (better is 24.Qe4!? Ne5 25.Qh4 Ng6+–) 24...Nb4 25.Qc7?? (better is 25.Qd1+–) 25...Nd3= 26.Ke2 Nf4 27.Kf2?? Qe2–+ 28.Kg3 Qg2 29.Kf4 Be5 30.Qe5 fe5 31.Ke5 Qh1 32.f4 f6! 33.Nf6 Qa1 34.d4 Kg7 35.Nf5 Kg6 36.Nh4 Kf7 37.Nf5 Qa5 38.d5 Qc3 39.Nd4 Qe3 40.Ne4 Re8 41.Ne6 de6 (41...de6 42.h4 ed5 43.Kd5 Qe4 44.Kc5 Qc2 45.Kd4 Re4 46.Kd5 Ke7 47.h5 Qc4) 0–1. combijack (1730) – jpdix, gameknot.com, 2012.

3.e3 f6

4.c4 Bb7 5.cb5+/– ab5 6.Qh5 g6 7.Qb5 Ra7 8.Qc5 d6?? (better is 8...Nc6 9.a3 e5+/–) 9.Qa7+– Qc8 10.Qa4 Bc6 11.Bb5 Qb7 12.Bc6 Nc6 13.b5 Kf7 (13...Nb4 14.b6 Nc6 15.bc7 Qc7 16.Nc3+–) 14.Bc3 (14.Qc4 e6 15.Qc6 Qc6 16.bc6 Ne7+–) 14...Kg7 (14...Nd4 15.Nf3 Nf3 16.gf3 Qf3+–) 15.bc6 Qb6 16.Nf3 h5 (16...e5 17.d4 e4 18.Nbd2+–) 17.Ng5 Nh6 18.Ne6 Kf7 19.Nf8 (better is 19.Qe4!? Qb8+–) 19...Rf8 20.0–0 Nf5 21.e4 Nh6 22.d4 Ng4 23.h3 Nh6 24.Nd2 g5 25.Rab1 Qb1 26.Rb1 Rc8 27.e5 (27.Qb3!? Kg6 28.Qb7 Rg8 29.Qc7 g4 30.Qe7 gh3+–) 27...de5 28.de5 fe5 29.Be5 (29.Qe4 Rf8 30.Nf3 Rd8 31.Ng5 Ke8 32.Qg6 Nf7 33.Qf7) 29...e6 30.Qe4 Nf5 31.g4 hg4 32.hg4 Nh4 33.Qh7 Kf8 34.Qh8 Kf7 35.Qc8 Ng6 36.Qc7 Kg8 37.Qg7 1–0. Valpa – Idris, playchess.de, 2005.

4.Bd3 Bb7?? 5.Nf3 (5.Qh5 g6 6.Bg6 hg6 7.Qg6) 5...e5 6.Bf5 (6.Ne5!? fe5 7.Qh5 Ke7 8.Qe5 Kf7 9.Qh5 Ke7 10.Qe5 Kf7 11.Qh5 Ke7 12.Qe5=) 6...g6 7.Bd3? (better is 7.Bh3+=) 7...f5?? (better is 7...e4 8.Be4 Be4–+) 8.Ne5 (8.Be5 Nf6 9.c3 Nc6+/–) 8...Bb4 (8...Nf6 9.0–0 Bb4 10.a4+=) 9.c3 (better is 9.Ng6!? hg6 10.Bh8+/–) 9...Ba5 (9...Bg2 10.Rg1 (10.cb4?! Bh1 11.Ng6 hg6 12.Bh8 Qh4=) 10...Bd6 11.c4+=) 10.Qb3 (10.c4 Nf6 (10...Bg2? 11.Rg1+–) 11.0–0 d6+=) 10...Bg2?? (better is 10...Qe7=) 11.Qf7 1–0. WirralBoy – Pekin Dragons, ChessWorld.net, 2013.

4.Bd3 g6 5.Nf3+=.

3.e3 Nf6

4.Be2 Bb7 5.g4?? h6 (better 5...Bh1 6.a4 Nc6–+) 6.Nf3 d5 (6...Ng4 7.a4=+) 7.Rg1 Nbd7 8.h4 e6 9.g5 hg5 10.hg5 Ne4 11.g6 f5 12.Ne5 (12.a4!?=) 12...Ne5 13.Be5 Qe7 (13...Qh4 14.Rf1 Qh6=+) 14.d3? (14.a4 Qb4 15.ab5 Bd6 16.Bd6 Qd6 17.ba6 Ba6=) 14...Nf6 (better 14...Qb4!? 15.Kf1 Nc5–/+) 15.Nd2 Nd7 (worse 15...Qb4 16.Bf6 gf6 17.g7 Bg7 18.Rg7 Rh1 19.Bf1+–) 16.Bc7 Qb4 17.c3 (17.c4 Qc5 18.Bg3 bc4 19.dc4 Qa5=+) 17...Qc5 (17...Qc3 18.Rc1 Qa3 19.Rc2–/+) 18.Bf4 (18.Ba5 Qa3 19.Nb3 Bd6=+) 18...Qc3–/+ 19.Rc1 Qb4 (19...Qa5 20.Rc7 e5 21.Rb7 ef4 22.Qc2 fe3 23.fe3–/+) 20.Rc7 e5 21.Bg3 Bd6 (better 21...Bc8 22.Qc2 Kd8–/+) 22.Rc1?? (better 22.Rb7 f4 23.Bg4+=) 22...Ke7 (better 22...f4–+) 23.d4 ed4 24.Bd6 Kd6 25.ed4 Rae8 26.Qc2 (better 26.Kf1–+) 26...Qd4?? (26...Rc8 27.Qb1 Qd4 28.Rc8 Bc8 29.Qd1–+) 27.Kd1?? (better 27.Qc7 Ke7 28.Qb7+–) 27...Qf2 (better 27...Rc8 28.Qf5 Rhf8–+) 28.Rf1?? (better 28.Qc7 Ke6 29.Rf1–+) 28...Qe3 (28...Qe2) 29.Qd3?? (better 29.Qc7 Ke7 30.Qb7+–) 29...Qd3 (29...Rh2!? 30.Re1 Qd3 31.Bd3 Re1 32.Ke1–+) 30.Bd3 Ne5 31.Bf5 Nc4 32.Be6 (32.Nc4 bc4 33.Rc3–+) 32...Ne3 33.Ke2 Re6 (better 33...Nf1 34.Rf1 Re6 35.Kd3 Rg6–+) 34.Kf2 (34.Rf7 Nc4 35.Kd1 Rh1 36.Kc2 Rh2–+) 34...Nc4 (better 34...Rh2 35.Kf3 d4 36.Kg3 Nf1 37.Nf1 Rg2 38.Kh4 Reg6 39.Rc6 Bc6 40.Nd2 Rh6) 35.Kg1 (35.Nf3 Rf8 36.Rce1 Rg6 37.Rg1 Rg1 38.Rg1–+) 35...Ne3 (35...Rg6 36.Kf2 Rh2 37.Kf3 d4 38.Ne4 Ke5 39.Rf2 Be4 40.Ke2 d3 41.Ke1 Rg1 42.Rf1 d2 43.Kd1 Rf1) 36.Rf6?? (36.Kf2 Rh2 37.Kg3 Rg2 38.Kh3 Reg6 39.Rf4 R6g3 40.Kh4 g5 41.Kh5 gf4 42.Nc4 bc4 43.Rh1 Rg8 44.a3 Rh8) 36...Rh1! 37.Kh1 d4 (37...Rf6 38.Nb3–+) 38.Kh2 (38.Rf3 Rg6 39.Rb1 Rf6–+) 38...gf6 (38...Rf6!? 39.Nb3 Rg6 40.Rg1 Rh6 41.Kg3–+) 39.Kh3 (39.g7 Re8 40.Nb3 Ke5–+) 39...Re8 40.Kh4 (40.Rg1 Rh8 41.Kg3 Rh6–+) 40...Rh8 41.Kg3 Ke5 (better 41...Rh6 42.Kf4 Rh4 43.Kg3 Rg4 44.Kh3 Rg6 45.Nb3–+) 42.Nf3 (42.Nf3 Bf3 43.g7–+). anotherheaven – SUPERPRIME (1790), Daily Bullet Arena, 2015.

4.Nf3 g6 5.Nc3 Nc6 6.a3 (6.Nd5 Bg7+=) 6...Bg7 7.d4 (7.Nd5 0–0 8.Nf6 ef6+=) 7...0–0= 8.Be2 d5 9.h3 Bf5 10.0–0 Na7 11.Ne5 Ne4 (11...Qd6 12.Bf3=) 12.Ne4+= Be4 13.f3 Bf5 14.g4 Be6 15.c3 Qd6 16.f4 f6 17.Nd3 c6 18.Nc5 Nc8 19.Ne6 Qe6 20.Qd2 (20.Qd3 f5=) 20...Nd6=+ 21.Bd3 Ne4 (21...f5 22.gf5 Nf5 23.a4=+) 22.Qg2 (22.Qc2 f5=+) 22...f5 (22...Nc5 23.Bg6 hg6 24.bc5 Qe3 25.Kh2=) 23.gf5= Qf5 24.Be4 Qe4 (24...de4!? 25.c4 a5=) 25.Qe4+= de4 26.Rf2 e6 (26...Rf5 27.c4+=) 27.a4 Bf6 28.Rc2 Rfc8 29.Kh2 (29.c4 Kf7+=) 29...Bh4 30.Kg2 g5 31.fg5 Bg5 32.Bc1 Rf8 33.ab5 ab5 34.Rca2 Ra2 35.Ra2 Rc8 36.Ra6 Kf7 37.Kg3 h5 38.Bd2 (38.Ra7 Kg6=) 38...Kf6 (38...e5 39.Kf2=) 39.Ra7 (39.h4 Bh6=) 39...Rg8 40.Kh2 Rc8 41.Ra6 Ke7 42.Kg3 Rg8 43.Kh2 Kd6 44.Ra1 e5 45.Rg1 Kd5?? (better 45...Rg7=+) 46.h4!+– Bh4? (46...ed4 47.Rg5 Rg5 48.hg5 d3+–) 47.Rg8 1–0. chatham628 (1770) – lagor, gameknot.com, 2018.

3.e4 Bb7

4.Nc3 e5 5.Nf3 Bb4 6.Ne5 Qe7 7.Nd5 (better is 7.Ng4!? Bc3 8.Bc3 Be4 9.Be2=) 7...Bd5–/+ 8.ed5 d6?? (8...f6 9.Qh5 Kd8–/+) 9.Qe2?? (better is 9.Qg4 f5 10.Qb4+/–) 9...de5–/+ 10.Qe5 (10.Be5 Kf8 11.a4 Nd7–+) 10...Qe5 (10...Nd7 11.Qe7 Ne7 12.a4 ba4 13.Ra4 Nd5 14.Bg7–+) 11.Be5 Nf6 12.c3? (better is 12.Bf6!? gf6 13.a4–+) 12...Bd6–+ 13.f4 (13.Bf6 gf6 14.a4 b4–+) 13...Be5 14.fe5 Nd5 15.g3 Nc6 16.Bg2 Rd8 17.d4 (17.0–0 0–0 (17...Ne5?! 18.Rfe1 f6 19.Bd5–+) 18.Rfe1 Na5–+) 17...Nce7 (better is 17...b4!? 18.cb4 Nd4 19.Rc1 Nb4 20.Rc7 Nd3 21.Kf1–+) 18.Rc1 c5! 19.dc5 (19.Ke2 Nc6 20.Rhd1 Ke7–+) 19...Rc8 20.c4 (20.0–0 Rc5 21.e6 fe6–+) 20...Rc5 21.0–0 bc4 22.e6 (22.Rfe1 c3–+) 22...fe6 23.Rb1 (23.Bh3 Rc6–+) 23...c3 24.Rf2 (24.Rb7 Ne3 25.Rc1 Kf7–+) 24...Rf8 25.Re2 Rf6 26.Bh3 (26.Be4 Nc6 27.Rf2 Nd4–+) 26...Kf7 0–1. mika76 (1670) – charmedones (1690), gameknot.com, 2011.

4.d3 d6 5.Nf3 e5 6.g3 Be7 7.Bg2 Bc8 (7...a5 8.ba5 Nf6 9.Bc3+=) 8.0–0 Bg4 9.Qe1 Qd7 10.Nfd2 Bh3 (10...Nc6 11.Nb3=) 11.Nf3 Bg2 12.Kg2 Nf6 13.c4 Ng4 (13...bc4 14.dc4 Qa4 15.Bc3=) 14.h3= Nf6 15.Nbd2 0–0 16.Qe2 bc4 17.Nc4 h6 18.Rac1 Nc6 19.a3 Nh7 20.Rfd1 (20.Ne3 Rfc8+=) 20...f5 (20...Ng5 21.h4 Nf3 22.Qf3=) 21.ef5 Qf5 (21...Rf5 22.Qc2 Rf3 23.Kf3 Ng5 24.Ke2+=) 22.Qe4 Qd7 (22...Qe4 23.de4 Na7 24.Ne3+/–) 23.d4 (better is 23.Ne3!? Na7 24.Qb7+–) 23...Nf6+= 24.Qe2 e4 25.Nh2 d5 (25...Qe6 26.d5 Nd5 27.Rd5 Qd5 28.Ne3+=) 26.Ne5+/– Ne5 27.de5 Nh7 (27...Ne8!?+/–) 28.Qg4+– Qd8 (28...Qe8!? 29.Rc7 Qf7+–) 29.Qe6 Kh8 30.Rd5 (30.Qd5!? Qb8 31.Qd7 Bd8+–) 30...Qe8 31.Rc7 (better is 31.Rc2 Ng5 32.Qd7+/–) 31...Rf2= 32.Kg1 Rf7 33.Rdd7?? Bc5–+ 34.bc5 Rf1?? 35.Nf1+/– Qe6 36.Rg7 Rc8?? 37.Rh7+– Kg8 38.Rhg7 Kf8 39.Rc8 Kg7?? 40.Rc7 Kg6 41.Kg2 Qb3 42.Bd4 Qc2 43.Kg1 Qd1 44.Bf2 Qa4 45.Rb7 Qa3 46.Rb6 Kf7 47.c6 Qc3 48.Ra6 Qe5 49.Ra7 Kg6 50.c7 Qe8 51.Ne3 Qc6 52.Ng4 Qc1 53.Kg2 h5 54.Ne5 Kf5 55.Nd7 Qb2 56.c8Q e3 57.Qf8 Ke6 58.Nc5 Kd5 59.Rd7 Kc6 60.Qc8 (60.Qc8 Kb5 61.Qb7 Kc4 62.Qd5 Kb4 63.Nd3 Kc3 64.Rc7 Kd2 65.Nb2 Ke2 66.Qd3) 1–0. pillsbury (2065) – jaortiz (2295), net–chess.com, 2013.

4.d3 e6 5.a3 Nf6 6.Nd2 Be7 7.Ngf3 0–0 8.Be2 c5 0–1. nxito – retiponziani, ChessWorld.net, 2012.

4.f3 Nc6 5.a3 e5 6.c4 bc4 7.Bc4 f5 (7...Qg5!? 8.Qe2 a5+=) 8.Ne2 d6? (better is 8...Qh4 9.g3 Qh3=) 9.0–0+– f4 (9...Nf6 10.Nbc3 f4 11.d4+–) 10.d4 (better is 10.Qb3 Nh6+–) 10...Qg5? (better is 10...Nf6+–) 11.Qa4 ed4 (11...Kd8 12.Be6+–) 12.Bg8 (12.Nd4 a5 13.Nc6 ab4 14.Na5 c6 15.ab4 Qd8+–) 12...Rg8 (12...Qb5 13.Qb5 ab5 14.Bd5+–) 13.Nd4 Qe5 14.Rc1 0–0–0 15.Rc6 Bc6 16.Qc6 Qe8 17.Qa6 Kd7 18.Nd2 Ra8 19.Qc6 Ke7 20.Nf5 Kf7 21.Qd5 Qe6 22.Qa8 d5 23.Qd5 1–0. Glowacki,Andrzej (1830) – Gucaga,Augustas, Suwalki Poland, Open, 2012.

4.f3 e6 5.a3 d5 6.d3 c5 7.bc5 Nf6 (7...d4!?=) 8.e5+= Nfd7 9.d4 Nc6 10.Nd2 Be7 11.Nb3 0–0 12.Bd3 f6 13.ef6 Bf6 14.f4 Qc7 15.g3 (15.Qg4 Rae8+/–) 15...Rae8 16.Qh5 (16.c3!?+=) 16...g6= 17.Bg6 hg6 18.Qg6 Bg7 19.0–0–0 Rf5?? (better is 19...Re7–/+) 20.Qe8+– Nf8 21.Nf3 Ne7 22.Ng5 Rg5 (22...Rf6 23.Rde1 Bc6 24.Qh5+–) 23.fg5 Neg6 24.Rhf1 (better is 24.Bc3 Bc6 25.Ba5 Qb7+–) 24...Bc6 25.Rf8! Nf8 (25...Nf8 26.Qh5 Combination; 25...Bf8 26.Qg6 Double attack (26.Qg6 Remove defender)) 26.Qh5 Qe7 27.h4 Be8 28.Qf3 Bg6 29.Re1 1–0. Williams,Barry M – Reed,Ken G, NZCCA HT corr New Zealand, 2000. (=1.e4 a6 2.b4 b5 3.Bb2 Bb7)

4.f3 e6 5.Bd3 c5 (5...Qg5!? 6.Qe2 Bb4–/+) 6.bc5 Nc6 (6...Bc5 7.a4 b4 8.Bf1=+) 7.Ne2 (7.f4 Nf6 8.e5 Nd5=) 7...Nf6 8.0–0 (8.a4 b4=) 8...Bc5=+ 9.Kh1 0–0 10.e5 Nd5 11.f4 f6 12.c4 bc4 13.Bc4 fe5 14.fe5 (better 14.Bd5 ed5 15.Be5=+) 14...Ne5?? (14...Nb6 15.Bd3 Qh4–+) 15.Be5+– Qg5 16.Bg3 Rf1 17.Qf1 Rf8 Threatening mate... how? 18.Qe1 Nf6?? (better 18...Nb4 19.Nbc3 Nc2=+) 19.d4+– Bd6 20.Qg1?? (better 20.Nd2+–) 20...Bg3 21.Ng3 Ng4 22.Nc3 Nf2 23.Qf2 Rf2 24.Kg1 (24.Bf1 Qe3 25.Nge2–+) 24...Rg2 25.Kh1 Rd2 (25...Qh4 26.Be6 de6 27.Nf1 Rh2 28.Kg1 Qf2) 26.Nce4 (26.d5 Qf4 27.Be2 Rd5 28.Kg1 Qd4 29.Kf1 Qc3 30.Rb1–+) 26...Be4 27.Kg1 Qe3 28.Kf1 Qf2 (28...Bg2) 0–1. gordiemac – retiponziani (1890), ChessWorld.net, 2012.

4.Nf3 d6 (4...Be4!? 5.a4 Nc6=) 5.Bd3 Nd7 6.0–0 (6.a4 ba4 7.Ra4 c5=) 6...e5 (6...c5 7.a4 ba4 8.Bc3=) 7.Nc3 (7.a4 ba4 8.Nc3 c5+=) 7...g6 (7...c5 8.bc5 Nc5 9.Qe2=) 8.Ne2 (8.a4 a5 9.ba5 b4+=) 8...Bg7 (8...c5 9.c3=) 9.c4 (9.a4 ba4 10.Nc3 c5+=) 9...bc4 10.Bc4 Ne7 (10...Be4 11.Nc3 Bb7 12.d4=+) 11.Ng5 (11.Nc3!?+=) 11...0–0= 12.Qb3 d5 13.ed5 Nd5 (better 13...Nb6!?=) 14.Bd5 Bd5 15.Qd5 Qg5 16.Qd7 Rad8 17.Qc7 Rd2?? (better 17...Qd2 18.Be5 Be5 19.Qe5 Rfe8+–) 18.Be5?? (better 18.Bc1 Qd8 19.Qd8 Rdd8 20.Be3+–) 18...Be5–+ (18...Qe5?! 19.Qe5 Be5 20.Rae1=) 19.Qc5 (better 19.Qc4 Ba1 20.Ra1–+) 19...Re2 20.Rae1 Re1 21.Re1 Bf6 (21...Re8 22.g3–+) 22.Qg5 Bg5 23.g3 Bd2 24.f4?? (24.Rb1–+) 24...Be1 25.Kg2 (25.a3 Bc3–+) 25...Bb4 26.Kf3 a5 (26...Rc8 27.a4–+) 27.Ke4 Rd8 28.g4 f5! 29.gf5 gf5 30.Kf5 Kg7 31.h4 Kf7 32.h5 Rd5 33.Kg4 Kf6 34.a3 (34.Kg3–+) 34...Ba3 35.f5 Bb4 36.h6 Bc3 37.Kf4 White threatens to counter with a4 37...a4 38.Ke4 (38.Kg3 a3 39.Kf2 a2 40.Ke3 a1Q 41.Kf2 Qe1 42.Kf3 Rd3 43.Kg4 Qe4 44.Kh5 Rh3) 38...Rd4 39.Ke3 (39.Kf3 a3 40.Kg2 a2 41.Kg3 a1Q 42.Kg2 Qa2 43.Kf3 Be1 44.Ke3 Qf2) 39...a3 40.Kf3 a2 41.Ke3 (41.Kg3 a1Q 42.Kg2 Qa2 43.Kf3 Be1 44.Ke3 Qf2) 41...a1Q 42.Kf3 (42.Kf2 Qb2 43.Kf3 Be1 44.Ke3 Qf2) 42...Qd1 (42...Qf1 43.Kg3 Be1 44.Kh2 Rd2) 43.Ke3 (43.Kg2 Qe2 44.Kg3 Rd3 45.Kf4 Be5) 43...Qe1 (43...Rg4 44.Kf2 Bd4) 44.Kf3 Qe4 (44...Qf1 45.Kg3 Be1 46.Kh2 Rd2) 45.Kf2 (45.Kg3 Qe3 46.Kg2 Rd2 47.Kf1 Qf2) 45...Rd2 46.Kg3 Qe3 (46...Be5 47.Kh3 Rd3) 47.Kg4 Rd4 48.Kh5 Qf3 (48...Qe2) 0–1. alessandrocarvalhaes (1925) – TitusMcLovin (1915), lichess.org, 2020.

3.e4 Nc6

4.a3 e5 5.Nf3 Rb8 (5...d5 6.ed5 Qd5 7.Nc3+=) 6.Be2 (6.Be5?! Ne5 7.Ne5 Qe7=) 6...Bd6 7.0–0 f6 8.c4 Nge7? (better is 8...bc4 9.Bc4 Nge7+/–) 9.c5+– 0–0 (9...Bc5 10.bc5 d5 11.d3+–) 10.d4 (10.cd6 cd6 11.d4 Ng6+–) 10...h6 (10...Bc5 11.bc5 ed4 12.Nd4+–) 11.cd6 cd6 12.d5 Na7 13.h3 g5 (13...f5 14.Nc3+–) 14.Nh2 Ng6 (14...f5 15.ef5 Bb7 16.Ng4 Nf5 17.Bd3+–) 15.Ng4 Nf4 (15...Kg7 16.Ne3+–) 16.Nh6 Kg7 17.Nf5 Kg6 18.Nd6 Rb6 19.Nc8 Qc8 20.Bg4 Rc6 (20...Kg7+–) 21.dc6 dc6 (21...Qc6 22.Nc3 Rd8+–) 22.Bc8 Nc8 23.Qd7 1–0. KMiroslav – horsehold, ChessWorld.net, 2013.

4.a3 e5 5.Nf3 d6 6.Be2 Be6 7.0–0 Nf6 8.Nc3 Nd4 9.Nd4 Qc8?? (better is 9...ed4 10.Nb1 c5=) 10.Ne6+– fe6 11.d3 c5 12.bc5 dc5 13.Bh5 g6 14.Be2 Qd8 15.f4 ef4 16.Rf4 Nh5 (16...Bd6 17.Rf1 Be5+–) 17.Bh5 (17.Bh5 Bg7 18.Bf3+–) 1–0. Mr.Oldenslo – horsehold, ChessWorld.net, 2013.

3.Nf3 Bb7

4.d3 Nf6 5.e4 e6 6.a3 c5 7.c3 cb4 8.ab4 Nc6 9.Be2 Be7 10.Nbd2 Qc7 11.Qb1 Ng4 12.h3 Nge5 13.0–0 Rg8 (13...Nf3 14.Bf3 (worse 14.gf3 Qf4 15.Rd1 0–0–/+) 14...0–0 15.Qe1=) 14.d4 Nc4 (better 14...Ng6!?+=) 15.Nc4+– bc4 16.Bc4 (16.Nd2!?+–) 16...Nb4 17.Be2 White prepares the advance e5 (17.cb4?! Qc4 18.Ba3 Rf8=) 17...Nc6 18.e5 g5 (18...Rh8 19.Ba3+=) 19.Bd3 (better 19.Qh7 Rf8 20.Bc1+–) 19...g4 20.hg4 Rg4 21.Bh7?? (better 21.Be2+=) 21...Ne5–+ 22.Ne5 Rg2 23.Kh1 Rf2 24.Be4 Rf1 25.Qf1 Be4 26.Kg1 f6 27.Nf3 (27.Qe2 Qb7 28.Re1–+) 27...Kf7 (better 27...Qg3!? 28.Qg2 Qf3 29.Qf3 Bf3 30.c4–+) 28.Kf2?? (better 28.Ng5! Kg7 29.Ne4=) 28...Qf4 (better 28...Bf3 29.Qh3 Be4 30.Ke3–+) 29.Qe2 (29.Qh3–+) 29...Rg8 30.Rg1 (30.Rh1 Rg3 31.Qe4 Qe4 32.Kg3 Bd6 33.Kf2 Qc2 34.Ke3 Qb2 35.Rh7 Kg6 36.Rh8–+) 30...Bf3 31.Qf3 Qf3 32.Kf3 Rg1 33.Ke3 Rg2 (better 33...Rb1 34.Kd3 Rb2 35.c4–+) 34.Bc1 Rc2 (34...d5!? 35.Kf3 Rc2 36.Bf4–+) 35.Bd2 Rd2! 36.Kd2 f5 37.Kc2 f4 38.Kd3 a5 39.Ke4 a4 40.Kf4 a3 41.c4 a2 42.d5 a1Q 43.de6 de6 44.c5 (44.Kf3 Qd1 45.Kf2 Bc5 46.Kg3 Qe2 47.Kh3 Qf3 48.Kh2 Qg4 49.Kh1 Qh3) 44...Qd4 45.Kf3 Bc5 46.Kg3 Kf6 (46...Qe3 47.Kg2 Qf2 48.Kh3 Bd6 49.Kg4 Kg6 50.Kh3 Qg3) 47.Kh3 (47.Kf3 Qf2 48.Kg4 Qg2 49.Kh4 Bf2 50.Kh5 Qg6) 47...Qf4 (47...Qg1 48.Kh4 Bf2 49.Kh5 Qg6) 48.Kg2 Kg5 49.Kh3 Qg4 (49...Qf1 50.Kg3 Bd6) 50.Kh2 e5 (50...e5 51.Kh1 Qh3) 0–1. alessandrocarvalhaes (1860) – Blunout (2005), lichess.org, 2019.

4.d3 Nf6 5.e4 e6 6.a3 c5 7.c3 cb4 8.ab4 Nc6 9.Be2 Ng4 (9...Be7 10.Nbd2=) 10.Nbd2 h5 11.Qc1 Nh6 12.Qc2 Rg8 13.Bc1 g5 14.Nb3 g4 15.Nfd4 Ne5 (15...Nd4!? 16.Nd4 Rc8+=) 16.Be3 Rc8 17.Qd2 Qf6 18.0–0 (18.Nc5 Bc5 19.bc5 Rg6+–) 18...Qh8 (better 18...Nf3! 19.Bf3 gf3=) 19.Na5 Ba8 20.Nab3 (better 20.Rfc1+–) 20...h4?? (20...Bb7 21.Nc5 Bc5 22.bc5 Rg6+–) 21.Ra6+– g3 22.h3 (22.Nb5?! gh2 23.Kh1 Qg7+–) 22...gf2 23.Bf2?? (better 23.Rf2 Bb7 24.Rb6+–) 23...Qg7+= 24.g4 hg3 25.Be3 Qh8 26.Bf4 Bg7? (26...Bb7 27.Rb6 Bc6 28.Nb5+=) 27.Kg2?? (27.Nb5 Ke7 28.d4+– (28.Bg3?! Nf5 29.ef5 Qh3=)) 27...Ng6+= 28.Bg5 (28.Kg3? Nf4 29.Kf4 Bd4 30.Nd4 Qf6 31.Ke3 Qg5 32.Rf4 e5–+; 28.Bg3?! Nf5 29.Ra8 Nfh4 30.Kh2 Ra8 31.Nb5 Be5+=) 28...f5? (better 28...Nf5 29.Nb5 Be5+–) 29.Bf3?? (29.Nb5!? Nf7 30.Nc7 Kf8 31.Ra8 Ra8 32.ef5 ef5 33.Rf5 Bc3+–) 29...Ne5?? (better 29...Nf7 30.Nb5 Bc6 31.Rc6 dc6 32.ef5 Ng5 (32...cb5? 33.fg6 Nd8 34.d4+–) 33.Qg5 Nh4 (33...cb5 34.Qg6 Kd8 35.Qe6 Rc3 36.Qb6 Rc7 37.Nc5+–) 34.Kh1 A) 34...cb5 35.Bh5 Kd7 36.fe6 Ke6 37.Re1 Be5 38.Qh4 Rc3 39.Nd4 Kd6 40.Nb5 Kc6 41.Qe4 Kb6 42.Nc3 (42.Qe5 Qe5 43.Kg2 Rc2 44.Be2 Re2 45.Re2 Qe2 46.Kg1 Qf2 47.Kh1 Qf1) 42...Qh5 43.Nd5 Ka7 44.Nf4+– (44.Qe5 Qh3 45.Kg1 Qh2 46.Kf1 Qf2); B) 34...Nf3?! 35.Nd6 Kd7 36.Qg3–+; C) 34...g2 35.Bg2 Be5 (35...cb5?! 36.f6 Bf6 37.Qb5 Kf8 38.Qa6–/+; 35...Ng2 36.Nd6 Kd7 37.fe6 Kd6 38.Qc5 Ke6 39.Qf5 Ke7 40.Nc5 Qh3 41.Qh3+=) 36.Nd6 Bd6–+) 30.Nb5+– (30.Kg3 Nf3 31.Kf3 fe4 32.Kf2 Rf8 33.Ke1 Rf1 34.Kf1 Nf5–/+) 30...Nf3? (30...Nhf7 31.Nc7! Kf8 32.Nc5+– (32.Na8?! Nf3 33.Rf3 Bc3+=; 32.Kg3?? Ng5 33.Qg5 Nd3–+)) 31.Rf3 (better 31.Nd6 Kf8 32.Rf3+– (32.Kf3?! Nf7 33.Nc8 Bb7+–)) 31...fe4?? (31...Nf7 32.Nc7! Kf8+–) 32.Re3 (32.Nd6) 32...Nf5–/+ 33.Nd6?? (better 33.de4 Ne3 34.Qe3–/+) 33...Nd6–+ 34.Rd6 (34.Qa2 Bc6 35.Nc5 Bc3 36.Ne6 Bb4 37.Rc6 Rc6 38.Nd8 Rc2 39.Qc2 Rg5 40.Ne6 de6 41.Qa4 Kf7 42.Qb4–+) 34...ed3 35.Kg1 (35.Kg3 Be5 36.Kf2 Rg5 37.Rdd3 Rg2 38.Ke1 Rg1 39.Ke2 Qh5 40.Kf2–+) 35...Qh3 36.Red3 Qh1 0–1. alessandrocarvalhaes (1930) – Blunout (2035), lichess.org, 2020.

4.d4 d6 5.Nbd2 Nd7 6.e4 Ngf6 7.a4 Ne4 8.ab5 Nd2 9.Kd2 ab5 10.Bb5 Ra1 11.Ba1 e6+=.

4.d4 d6 5.Nbd2 Nd7 6.e4 Ngf6 7.Bd3 g6 8.e5 Nd5 9.a3 Bg7 10.ed6 cd6 11.0–0 0–0 12.c4 Nf4 13.Bc2 bc4 14.Nc4 Rc8 15.Bb3 Nf6 16.Na5 Bd5 17.g3 Ne6 18.Bd5 Nd5 19.Qb3 Nf6 20.d5 Nc7 21.Nc6 Qe8 22.Rae1 Ncd5 23.Bf6 Qc6 24.Bg7 Kg7 25.Rd1 Nf6 26.Nd4 Qb7 27.Qe3 e6 28.Nf3 Rfd8 29.h4 Rc2 30.Rd3 Kg8 31.Qg5 Ne4 32.Qd8 1–0. typ48 – bogdeea, playok.com, 2012.

4.d4 e5 5.Ne5 Bb4 6.Bc3 Bc3 7.Nc3+=.

4.e3 (--> 2.Bb2 Bb7 3.e3 a6 4.Nf3).

4.g3 e6 5.Bg2 Be7?? 6.Bg7+– Bf6 7.Bh8 Ba1 (7...Bh8 8.d4 e5 9.de5 Be5+–) 8.Ba1 Ne7 9.Nh4 (9.Bf6!? d6+–) 9...Bg2 10.Ng2 Nf5 (10...a5 11.ba5 Ra5 12.a3+–) 11.e3 (11.e4 Ne7 12.Qh5 d5 13.Qh7 a5+–) 11...Qe7 (11...Nc6 12.Qg4+–) 12.Qf3 (12.e4 Nd6 13.Qg4 f5 14.Qg8 Qf8 15.Qh7 fe4+–) 12...Nc6 (12...Qb4 13.Qa8 Qb1 14.Ke2 Qh1 15.Bf6+– (worse 15.Qb8 Ke7 16.Ne1 Qh2 17.Qc7 Qh5 18.Nf3 Nd6+–)) 13.a3 0–0–0 (13...a5 14.ba5 Ra5 15.g4+–) 14.Nf4 (better 14.g4!? Nd6 15.Bf6 Qf8 16.Bd8 Qd8+–) 14...Kb8 15.Nd3 h5 (15...Rg8 16.Nc5 Ka7 17.e4+–) 16.h4 Rg8 17.Qh5 Nd8 (17...Nd6 18.Qh7 Re8 19.Nc5+–) 18.Nc5 Ka7 19.Ne4 Nc6 20.Nf6 (20.g4!? Nd6 21.Bf6 Qf8 22.Qc5 Kb7+–) 20...Rg6 21.Ne4 d6 (21...d5 22.Nc5+–) 22.Qf3 e5 (22...Rh6+–) 23.h5 Rh6 24.g4 (better 24.Qf5 Qe8+–) 24...Ng7 25.Nbc3 Qe6 (25...Ne6 26.Nd5 Qd7 27.g5+–) 26.g5 (better 26.Ng5 Qe8 27.Qf7 Qf7 28.Nf7 Rh7+–) 26...Rh8 27.h6 Nf5 (27...Ne8 28.Nf6 Nd8 29.Bb2+–) 28.Nf6 (28.Nd6 Nfd4 29.ed4 ed4 30.Ne2 Qd6+–) 28...Nce7 29.Ncd5 Kb8 (29...c6 30.Ne7 Ne7 31.Qh3+–) 30.Ne7 (better 30.e4!? Nd4 31.Bd4 ed4+–) 30...Qe7 (30...Ne7 31.d4 d5+–) 31.Qf5 1–0. boryo84 (1640) – Akrapovik, lichess.org, 2019.

4.g3 e6 5.Bg2 Ne7 6.0–0 Nf5 7.d3 Bb4 8.e4 Ne7 9.Bg7 Rg8 10.Bf6 Qc8 (10...d6!?=) 11.c3+= Bd6 (11...Bc5 12.d4 Bb6 13.Nbd2+=) 12.e5 (12.Nbd2 Nbc6+–) 12...Bc5 (12...Nd5 13.Bh4 Bf8 14.a4+=) 13.d4+– Bb6 14.Be7 Ke7 15.Nbd2 Rg6 16.Nh4 (better 16.a4 ba4 17.Nc4+–) 16...Bg2? (better 16...Rg7!?+=) 17.Ng6+– (17.Kg2?! Qb7 18.f3 Rg7+=; 17.Ng2?! d5+=) 17...hg6 18.Kg2 c5 (18...d5 19.a4 c5 20.Nf3 ba4 21.Qa4+–) 19.Qg4 Qc6 20.Kg1 (20.Ne4 Kf8 21.Qh4 Kg7+–) 20...cd4 (20...d5 21.ed6! Qd6 22.Ne4+–) 21.cd4 Qc3 (21...d5 22.Qh4 Ke8+–) 22.Ne4 (22.Qh4 g5 23.Qg5 Kf8 24.Qh6 Ke7 25.Qf6 Kf8+–) 22...Qd4 23.Qh4 Ke8 (23...Kf8 24.Qh8 Ke7 25.Nd6 Qd6 26.ed6 Kd6 27.Qf8 Ke5 28.Qf7+–) 24.Nf6 (24.Nd6 Qd6 25.ed6 f6 26.Qf6 Nc6 27.Qg7 Bf2 28.Kf2 Rc8 29.Qg8) 24...Kd8+– 25.Qh8 Kc7 26.Rac1 (better 26.Rad1 Qb2 27.Ne8 Kc6 28.Nd6+–) 26...Kb7 (26...Bc5 27.Ne4!! Qe4 28.Rc5 Kb6+–) 27.Rfd1 (27.Qc8 Ka7 28.Rc7 Bc7 29.Qc7) 27...Qe5 (27...Qf2 28.Kh1 Qf3) 28.Nd7 (28.Qc8 Ka7 29.Nd7 Bf2 30.Kf2 Nd7 31.Rd7 Kb6 32.Qa8 Qb2 33.Kf3 Qf6 34.Kg2 Qb2 35.Kh3 Qc1 36.Qd8 Kc5 37.Qc7 Kb4 38.Qc1 Ka4 39.Rd4 b4 40.Qc6 Ka3 41.Qc2 b3 42.Qb3) 28...Qh8–+ 29.Nb6 Kb6 30.Rd6 Ka5 31.Rc3 (31.Rcd1–+) 31…Qc3 0–1. JUANKARODA (1685) – Akrapovik (1650), lichess.org, 2019.

4.g3 e6 5.Bg2 Nf6 6.a3 Be7 7.0–0 0–0 8.d3 Ne8 (8...d5 9.c4=) 9.e4 f6 10.Re1 Kh8 (10...a5=) 11.a4 (11.c4 Nc6+=) 11...c6 (11...Bb4!? 12.c3 Be7=+) 12.ab5 cb5 13.Qd2 (13.c3 Nc6+=) 13...Nc6= 14.e5 (14.c3 e5=) 14...f5 (14...Bb4 15.c3 Be7 16.Qe3–/+) 15.d4 (better 15.c3!?+=) 15...Bb4–/+ 16.Bc3 Be7 17.Re3 (17.d5 ed5 18.Qd5 b4–/+) 17...Rc8 18.Rd3 (18.d5 ed5 19.Qd5 f4–/+) 18...Nb8 (better 18...b4!? 19.Bb2 Na5–+) 19.Bb2 (19.Ba5 Nc7=+) 19...Be4–/+ 20.Rc3 Nc7 21.Ne1 (21.Rb3 Nd5 22.Nc3 Bb4–/+) 21...Bb4 (21...Bg2 22.Ng2 Bb4 23.Ba3 Bc3 24.Nc3–+) 22.Be4 (22.Ba3 Ba3 23.Rca3 Bg2 24.Kg2 d6–/+) 22...fe4 23.Qe3? (better 23.Ba3 Bc3 24.Nc3–/+) 23...Bc3–+ 24.Nc3 b4 (better 24...Nd5!? 25.Nd5 ed5 26.Qb3–+) 25.Ne4 Nd5 26.Qd2 Qb6 (26...Rc6 27.Nd3–+) 27.Nd3–/+ Nc6 (27...a5!?–/+) 28.Ndc5=+ Rc7 (28...Qc7!?=+) 29.Ra6= Qb5 (29...Qb8 30.Nd7 Rd7 31.Rc6+=) 30.Ra1 (better 30.Nd6 Qb8 31.Rc6 Rc6 32.Nd7=) 30...Qc4?? (better 30...Ra7=+) 31.Nd6+– Qc5?? (better 31...Ne5 32.Nc4 Nf3 33.Kg2 Nd2 34.Nd2 Kg8+–) 32.dc5 h6 33.c4 Nde7 34.Nb5 Rb7 35.Qe2 Nf5 36.Qe4 Kg8 37.Bc1 Nfe7 38.Be3 Nc8 (38...Rbb8 39.Bd2+–) 39.Nd6 (39.Bd2 Rb8+–) 39...Rb8 40.Rb1 b3 (40...Ra8 41.f4+–) 41.Nb5 Na5 42.c6! Nc6 (42...Nc6 43.Nd4 Double attack (43.Rb3 Deflection; 43.Nd4 Decoy); 42...dc6 43.Nd4 Double attack (43.Nd4 Decoy)) 43.Rb3 N8e7 44.Qd3 (better 44.Bc5 Rf7+–) 44...Rfe8 (44...Ne5 45.Qd6 N7g6+–) 45.Qd7 Ra8 (45...Kh7 46.Qe6 Nd8 47.Qg4+–) 46.Qe6 Kh8 47.Qd5! Ra1 (47...Nd5 48.cd5 Passed pawn) 48.Kg2 Ra2?? (better 48...Nd5 49.cd5 Ne5+–) 49.Nd6 (better 49.Qe6 Rb8 50.Rd3+–) 49...Rf8 (49...Nd5 50.cd5 Na5 51.Ne8 Nb3+–) 50.Rb7 (50.Rb7 Nd5 51.cd5 Ne5 52.Bd4+–) 1–0. Uencore (1700) – Akrapovik (1695), lichess.org, 2021.

4.g3 d6

5.Bg2 Nd7

6.0–0 e5 7.a4+=.

6.0–0 g6?? 7.Bh8 e5 8.d3+–.

3.Nf3 d6

4.a4 ba4 5.e4 Nf6+=.

4.e3 Nc6 5.a3 e6 6.c4 Nf6 (6...bc4!? 7.Bc4 Nf6+=) 7.cb5+/– ab5 8.Bb5 Bd7 9.Nc3 e5 10.0–0 Be7 11.Qc2 d5?? (better is 11...0–0!?+–) 12.d3 (12.Nd5 Nd5 13.Bc6 Bc6 14.Qc6 Kf8 15.Be5 Bf6+–) 12...d4? (12...0–0 13.Nd5! Nb4 14.ab4 Ra1 15.Ne7 Qe7 16.Ra1 Bb5 17.Be5+–) 13.ed4 Nd4 14.Nd4 ed4 15.Bd7 Qd7 16.Ne4 Ne4+/– 17.de4 0–0 18.Rad1 Bf6 19.Rfe1 Be5 20.g3 f5? 21.f4+– Bf6 22.e5 Be7 23.Rd4 Qe6 24.Qc4 Qc4 25.Rc4 Rac8 26.Rec1 g5 27.Rc7 Rc7 28.Rc7 Bd8 29.Rc8 Bb6 30.Kg2?? Rc8–+ 31.a4 Rc2 32.Kh3 Rb2 33.a5 Ba7 (33...Ba7 34.g4 Rb3 35.Kg2 gf4 36.e6 f3 37.Kg3 f2 38.Kf4 f1Q 39.Ke5 Bb8 40.Kf6 fg4 41.Ke7 Rd3 42.b5 Qf8; 33...g4 34.Kh4 Bd8 35.Kh5 Rh2) 0–1. Fournier,Frederic (1765) – panulo, Active, 2008.

4.e3 Nc6 5.a3 f6 6.d3 e5 7.Be2 Be6 8.0–0 d5 9.Nbd2 Bd6 10.c4 dc4 11.dc4 e4? (better is 11...Rb8!?+/–) 12.Ne4+– bc4 13.Nd6 cd6 14.Qc2 d5 15.Rfd1 Nge7 16.Bc4! Qc7 17.Bb3 Bf5 18.Qd2 Rd8 19.Nd4 Ne5 20.Nf5 Nf5 21.Rac1 Qb7 22.Be5 fe5 23.Ba4 Ke7 24.e4! Nd4 25.Qg5 Kd6 26.Rd4! ed4 27.e5 Ke6 28.Rc6 Qc6 29.Bc6 Rc8 30.Qg4 Ke5 31.Qg7 Kd6 32.Qf6 (32.Qf6 Kc7 33.Bd5+–) 1–0. lovecraft (2100) – rhometal (2070), net–chess.com, 2011.

4.e3 e5 5.a4 e4 6.Ng1 ba4 7.Ra4=.

4.h3 e5= 5.e4 Ne7 6.Be2 Bb7 7.Nc3 c5 8.bc5 dc5 9.Ne5 Nbc6 (better 9...Qc7 10.d4 f6+=) 10.Nf7?? (better 10.Nc6 Bc6 11.Bf3+–) 10...Kf7–/+ 11.0–0 Nd4 12.f4 Ng6 13.Bh5 Kg8 14.d3 Qb6 15.Ne2 Ne2 16.Qe2 c4 17.d4 Bb4 18.c3 Be7 19.Kh1 Qe6 (better 19...Qd6–/+) 20.f5+= Qe4 21.Qe4 Be4 22.fg6 hg6 23.Bg4 Rf8 24.Rfe1 Rf4 25.Be6 Kf8 26.Bc1 (26.Bc1 Rfh4 27.Kg1+=) 1–0. kpoynter – rstilt, net–chess.com, 2020.

3.Nf3 e6

4.a3 a5 5.Nc3 (5.e4 Bb7+=) 5...c6= 6.e3 a4 (6...ab4 7.ab4 Ra1 8.Qa1 Na6= (8...Bb4? 9.Nd5 Bd2 10.Nd2+–)) 7.Be2+= Bb7 8.0–0 Qe7 (8...Nf6 9.d3+=) 9.Rb1 (9.e4 d6+/–) 9...Na6+= 10.h3 Nc7 11.Nh2 (11.e4 d6+=) 11...e5 12.d3 (12.Nf3 d5=) 12...Nf6 13.Ne4 (13.Ng4 d5+=) 13...h6 (13...Ne4 14.de4 c5 15.bc5 Be4 16.Bd3=) 14.Nc5 0–0–0 15.Ng4 Kb8 16.Ne5 h5 17.d4 d6 18.Nb7 Kb7 19.Nd3 g5 20.f3?? Nfd5 21.Qd2 f5 22.Rfe1 g4 23.fg4 f4?? 24.Nf4 Qg5?! 25.Nh5 Bh6 26.Nf4! Rde8 27.Bf3 Nf4? 28.ef4 Re1 29.Re1 Qf4 30.Qf2 d5 31.c3 Qd2? 32.Qd2 Bd2 33.Re2 Bg5 34.Kf1 Re8 35.Re5 Bf4 36.Re8 Ne8 37.h4 Kc7 38.Kf2 Nd6 39.g3 Bh6 40.g5 Bf8 41.Bc1 Kd7 42.g4 Ne8 43.h5 1–0. keeder – xorb, ChessWorld.net, 2010.

4.e3 Bb4?? 5.c4 (better 5.Bg7 Bb7 6.Bh8+–) 5...Be7?? (better 5...Nf6=) 6.Bg7+– (6.cb5?! Nf6=) 6...Bf6 7.Bh8 Bh8 8.d4 c5 (8...bc4 9.Bc4 c5 10.Qd3+–) 9.cb5 ab5 (9...cd4 10.Nd4 ab5+–) 10.Bb5?? (10.Qc2 Qa5 11.Nbd2 Nf6 12.Qc5 Nc6+–) 10...Ba6?? (better 10...Qa5 11.Nbd2 Qb5+=) 11.Ba6+– Na6 12.Qb3 Nb4 (12...Ne7 13.0–0+–) 13.a3 Nd5 14.0–0 f6 (14...cd4 15.ed4 Ngf6 16.Rc1+–) 15.Nbd2 (15.Qc2 Qe7 16.Qc5 Qc5 17.dc5 f5+–) 15...Nge7 (15...cd4 16.ed4 f5 17.Nc4+–) 16.dc5 Kf7 (16...f5 17.Nd4+–) 17.Rac1 (17.e4 Nf4+–) 17...Rb8 18.Qc4 Nc6 (18...Kg8 19.Rfd1+–) 19.Nd4 (19.Qh4 Kg8+–) 19...f5 (19...Nd4 20.Qd4 f5 21.Qd3+–) 20.Nc6 (better 20.Nf5!? Qa5 21.Nd6 Kg8 22.Qg4 Bg7+–) 20...dc6 21.Nf3 h6 22.Nd4 (22.e4 fe4 23.Qe4 Qf6+–) 22...Bd4 23.ed4 h5 (23...Nf4 24.g3 Qd5 25.Qd5 Ne2 26.Kg2 ed5 27.Rcd1+–) 24.h3 (24.Rb1 Nf4 25.Rb8 Qb8+–) 24...h4 (24...Nf4 25.Kh2+–) 25.Rfe1 (25.Rb1 Nf4 26.Rb8 Qb8+–) 25...Ra8 (25...Nf4 26.Kh1+–) 26.Qe2 Qh8 (26...Nf4 27.Qe5 Qg5 28.Qc7 Kf6 29.Qc6 Ra6+–) 27.Qe6 (27.Qe6 Kg7 28.Qd7 Kg6 29.Qc6 Nf6 30.a4+–) 1–0. amirgloo (1905) – Niagrad (1775), lichess.org, 2020.

4.e4 Bb7 5.d3 d6 (better 5...Bb4!? 6.c3 Be7–/+) 6.Nbd2 e5 7.Be2 Nc6 8.0–0 (8.a3 Nf6+=) 8...f5 (8...Nb4 9.a4=) 9.a3 fe4 10.de4 Nf6 11.c4 bc4 12.Bc4 Be7 13.Ng5 h6?? (better 13...Qb8+–) 14.Nf7+– Qd7 15.Nh8 Ng4 (15...Qg4 16.Qc2+–) 16.Ng6 (better 16.Bf7!? Kd8 17.Bg6 Bh4+–) 16...Bg5 17.h4 (17.Nf3 Nf6 18.h4 Bf4 19.Nf4 ef4+–) 17...Bf6 (17...Bd2 18.Qd2 Ne7 19.Ne7 Qe7 20.f3+–) 18.Nf3 (18.Qb3 d5 19.ed5 Ne7 20.Ne7 Be7+–) 18...0–0–0 (18...Ne7 19.Ne7 Be7 20.Qb3+–) 19.b5 (19.h5 Kb8+–) 19...ab5 20.Bb5 Qe6 21.Re1 Nd4 (21...Ne7 22.Ne7 Qe7 23.Be2+–) 22.Bd4 (better 22.Nd4 ed4 23.Nf4 Nf2 24.Ne6 Nd1 25.Rad1 c6 26.Nd8 Kd8+–) 22...ed4 23.Nd4 (better 23.Rc1 Qa2 24.Rc2 Qa3 25.Nd4 Ne5 26.Ne5 de5 27.Qg4 Kb8 28.Nc6 Bc6 29.Bc6 Ka7+–) 23...Bd4 24.Qd4 c6 (24...Qg6 25.Rac1 Qf6+–) 25.Rac1 (better 25.Qa7 Ne5 26.Ba6 Ba6 27.Reb1+–) 25...Kd7 (25...Qg6 26.Bc6 Bc6 27.Qa7+–) 26.Nf4 (26.Qg7 Qf7 27.Qf7 Kc8 28.Bc6 Bc6 29.Rc6 Kb8 30.Rb1 Ka8 31.Qb7) 26...Qe5 27.Qe5 (better 27.Rc6! Qd4 28.Rc4 Ke7 29.Rd4 Ne5+–) 27...Ne5 28.Ba4 (28.Bc4 Ra8 29.Rb1 Ra7 30.Be6 Kc7+–) 28...Ke7 (28...Ra8 29.Rb1 Kc8 30.Bb3 Ra3 31.Ne6+–) 29.Ne2 Ra8 30.Bb3 (30.Rb1!? Bc8 31.Nc3 g5+–) 30...Ra3 (30...Nd3 31.a4+–) 31.Rb1 d5 (31...Ba6 32.Nd4 Bd3 33.Bc2 Bc2 34.Nc2+–) 32.ed5 cd5 (32...Nd3 33.Red1 Nc5 34.d6 Kd7 35.Nd4+–) 33.Nd4 Kd6 (33...Kf6 34.Bc2 Bc6 35.f4+–) 34.Nf5 Ke6 35.Ng7 Kf6 36.Ne8 Ke7 37.Nc7 (better 37.Re5 Kf8+–) 37…d4 (37...d4 38.Nb5 Ra6 39.Re5 Kf6+–). alessandrocarvalhaes (1820) – remorker (1800), lichess.org, 2019.

4.g3 Bb4?? 5.Bg7 Bb7 6.Bh8 Bf3 7.ef3+–.

4.g3 Nf6 5.a3 Be7 6.Bg2 Bb7 7.d3 c5 8.c3 Nc6 9.Nbd2 d6 10.0–0 Qc7 11.Nb3 cb4 12.cb4 Rc8 13.Rc1 Qd7 14.Nbd4 0–0 15.Qb3 Nd4 16.Bd4 Bd5 17.Qb2 Rc1 18.Rc1 Rc8 19.e4 Rc1 20.Qc1 Bc6 21.Nd2 d5 22.e5 Ne4 23.de4 de4 24.Be3 f5 25.ef6 Bf6 26.Ne4 Be4 27.Be4 g6 28.Kg2 Qg7 29.Qc8 Qf8 30.Qe6 Kh8 31.Bc5 Qg8 32.Qg8 Kg8 33.Bd5 Kg7 34.Bb7 Kf7 35.Ba6 Ke6 36.Bb5 Kd5 37.Be8 Bd4 38.Bd4 Kd4 39.b5 Kc5 40.a4 Kb6 41.Bc6 Ka5 42.f4 Kb6 43.Kf3 Ka5 44.Ke4 h6 45.h4 Kb6 46.Kd5 Kc7 47.a5 Kb8 48.a6 g5 49.Ke5 gh4 50.gh4 h5 51.Kf5 Ka7 52.Kg5 Kb6 53.Kh5 Kc7 54.Kg5 Kd8 55.h5 Kc7 56.h6 Kb6 57.h7 1–0. giorgo – sobrona, playok.com, 2012.

3.Nf3 f6

3.Nf3 Nf6

2.Bb2 Ba6

3.a4 ba4 4.Ra4 c6 5.e4 (5.Nf3 Nf6+–) 5...Bf1 (5...Bb5 6.Ra2 Bf1 7.Kf1+=) 6.Kf1+– Qb6 (6...Nf6 7.Nf3 a5 8.Nc3+=) 7.c4 (7.Qe2 Nf6+–) 7...c5 (7...Na6!? 8.Ba3 e6+=) 8.b5+– e6 (8...d6 9.Nf3+–) 9.d4+– cd4 10.Bd4 Qd6?? (better 10...Qb7+–) 11.e5 Qc7 12.Qf3 d5 (12...Nc6 13.bc6 Qc6+–) 13.ed6! Qd7 (13...Qd6 14.Ra7 Deflection; 13...Bd6 14.Bg7 Discovered attack (14.Bg7 Deflection)) 14.Qa8 Bd6 (14...Qd6 15.Nf3 Ne7 16.Ra7+–) 15.Bg7 (better 15.Ra7 Qd8 16.Bg7 Qg5 17.Bh8 Qc1 18.Ke2 Qc4 19.Kd1 Qf1 20.Kc2 Qb5+–) 15...Nf6 (15...Be5 16.Ke2 Bg7 17.Qb8 Qd8 18.Qd8 Kd8+–) 16.Bh8 Ne4 17.Ra7 Qd8 18.Qe4 Bc5 19.Ra8 Qd1 20.Qe1 Qd3 21.Ne2 Qc4 22.Rb8 Ke7 (22...Kd7 23.Qa5 Qe2 24.Ke2 e5 25.Qd8 Ke6 26.Qf6 Kd5 27.Qf7 Kd4 28.Rd1 Ke4 29.Nc3) 23.Qa5 Bd6 (23...Bb6 24.Qb6 Qd5 25.Qc7 Qd7 26.Qc5 Qd6 27.Qg5 Kd7 28.Qd8) 24.Qd8 1–0. GuestTRLR – GuestNYMV, freechess.org, 2020.

3.e3 c6 4.a4 ba4 5.Ba6 (5.Nf3 Bf1 6.Rf1 a5 7.ba5 Ra5+=) 5...Na6+= 6.Ra4 Nb4?? (better 6...Qb6+=) 7.Rb4+– Qa5 (7...Rb8 8.Rb8 Qb8 9.Ba3+–) 8.Bc3 Qa2 (8...Qc7 9.Nf3+–) 9.Nf3 Nf6 10.0–0 Ne4 (10...e6 11.Rb3 Bd6+–) 11.Re4 Rb8 (11...Qa6 12.d3+–) 12.Be5 Rb1 (12...Rb7 13.Nc3 Qa5 14.Qe2+–) 13.Qb1 Qb1 14.Rb1 e6 15.Rb8 Ke7 16.Rd4 d5 17.Rdb4 Kd7 (17...a5 18.R4b7) 18.R4b7 1–0. GuestYPVQ – destructorssss, freechess.org, 2019.

3.e3 e5 4.Be5 d5 (better 4...Nc6!? 5.Bf4 g5+–) 5.a4+– Bb4?? (better 5...c6+–) 6.Bg7 (6.Bb5?! Bb5 7.Qg4 Nf6 8.Qb4 Bc6+–) 6...Bf8 7.Bh8 Nf6 (7...ba4 8.Qg4 Bf1 9.Qg8+–) 8.ab5 Bb5 (8...Bb7 9.Nc3+–) 9.Bb5 Nbd7 (9...c6 10.Bd3+–) 10.Nf3 Qe7 11.0–0 (better 11.Ra6 Ne4 12.Ne5+–) 11...Qe3 12.de3 Ba3 13.Ra3 (13.Bf6 Rb8 14.Bd7 Kd7 15.Qd5 Kc8 16.Qf5 Kb7 17.Na3 a6 18.Rfb1 Ka7 19.Qc5 Rb6 20.Nb5 Ka8 21.Ra6 Kb7 22.Qc7 Ka6 23.Qa7) 13...c5 14.Bf6 Rd8 (14...Kf8 15.Bd7 Rc8 16.Qd5 Rd8 17.Qc5 Kg8 18.Qg5 Kf8 19.Qg7) 15.Qd5 Ra8 (15...Kf8 16.Ne5 Nf6 17.Qf7) 16.Qa8 1–0. GuestNZTQ – GuestNVMM, freechess.org, 2017.

3.Nf3 c6 4.e4 d5 (4...Nf6 5.Nc3+=) 5.ed5+– Qd5 6.Nc3 (6.Bd4 Bc8+=) 6...Qd6 7.Ne4 (7.a3 Nf6+–) 7...Qd8? (better 7...Qb4!? 8.Bd4 Nf6=) 8.Bd3+– e6 9.0–0 Nd7 (9...f6 10.Bc3+–) 10.Nfg5 (better 10.Nd6! Bd6 11.Bg7+–) 10...Ngf6+= 11.Nf6 gf6 (11...Nf6 12.Qf3 Bb7 13.a3+=) 12.Ne4 (12.Qh5 fg5 13.Bh8 Bb4+–) 12...Bh6? (better 12...Bb4 13.Qf3 e5+–) 13.Qf3+– Rg8 (13...Bg7+–) 14.Nd6?? (14.Nf6 Nf6 15.Bf6 Qd6+–) 14...Kf8? (14...Ke7 15.Ne4 f5 16.Ng3+–) 15.Rfe1 (better 15.Qh5!? Ke7 16.Nf5 ef5 17.Qh6 Ne5+–) 15...Bd2 16.Bh7 (16.Red1 Bb4 17.Qc6 Nb6 18.Bh7 Rg7+–) 16...Rg5 (16...Be1 17.Bg8 Bb4 18.Nf7+– (18.Qc6?! Nb6 19.Nf7 Qe7=)) 17.Red1 (better 17.Qc6 Be1 18.Re1+– (18.Qa6 Bb4 19.Nb5 Kg7–+)) 17...Bb4? (better 17...Rd5 18.Rd2 Rd2+–) 18.h4?? (better 18.Qc6!? Rh5 19.a3+–) 18...Rg7?? (better 18...Rd5 19.Ne4 f5=) 19.Be4+– (19.Qc6 Rh7 20.Qa6 Qc7 21.Nb5 Qb6+–) 19...Bd6? (better 19...Qe7 20.Bc6 Rd8 21.Nb5 Ne5 22.Be5 fe5+–) 20.Rd6+– Rc8 (20...Bc8 21.Bc6 Rb8 22.Qd3+–) 21.Rad1 (21.Rc6?! Bb7 22.Rc8 Bc8+–) 21...Qe7 (21...Rc7 22.Qa3 c5 23.Qa6 f5 24.Bg7 Kg7+–) 22.Rd7 Qe8 Black threatens to counter with f5 23.Bf6 Rg8 (23...Rd8 24.Rd8 Rg2 25.Qg2 Qd8 26.Rd8) 24.Bh7 (24.Qh5 Rg2 25.Kg2 Qd7 26.Qh8) 24...e5 (24...Rg6 25.Qc3 Qe7 26.Be7 Ke8 27.Qh8 Rg8 28.Qg8) 25.Bg8 (25.Qd3 Rg2 26.Kg2 Qe6 27.Rd8 Rd8 28.Qd8 Qe8 29.Qe8 Ke8 30.Rd8) 25...Qd7 (25...Rb8 26.Qg4 Qd7 27.Rd7 Ke8 28.Bf7 Kf8 29.Qg7) 26.Rd7 Re8 (26...c5 27.Qd5 Kg8 28.Qf7) 27.Qa3 (27.Qb3 Re6 28.Rd8 Re8 29.Qf7) 27...Re7 (27...b4 28.Qg3 Re7 29.Rd8 Re8 30.Qg7) 28.Rd8 1–0. guest61 – guest761, ICC, 1999.

3.Nf3 Nf6 4.a4+=.

3.e3 Nc6

4.a4 Nb4 5.ab5 Bb5?? (better 5...Bb7+=) 6.Bb5+– Rb8 7.Be2 Rb7 8.Ba3 Na6 (8...e5+–) 9.Ba6 Rb6 10.Bc5 Rc6 (10...Qa8 11.Nf3 Rg6 12.Bf1+–) 11.Ba7 Qa8 12.Bb5 Rc5 (12...Rg6 13.Bd4 Qd8 14.Bd3+–) 13.Bc5 (13.Bc5 Qa1 14.Bd4+–) 1–0. GuestVCLQ – GuestWPCH, freechess.org, 2017.

4.a4 Nb4 5.c3 ba4?? (better 5...Nd5+–) 6.cb4+– Bf1 7.Kf1 a5 (7...Nf6 8.Qa4 e6 9.Nf3+–) 8.Qa4 ab4 (8...Rb8 9.b5 c6+–) 9.Qa8 Qa8 10.Ra8 1–0. GuestYPVQ – destructorssss, freechess.org, 2019.

2.Bb2 Na6

3.a3 Rb8 4.Nc3 c6 5.Nf3 h5 (5...Nf6 6.e4) 6.e4+/– Rh6 7.Ng5 e5 8.Nf3 Rd6? (better is 8...d6!?) 9.Ne5+– f6?? (better is 9...Nf6+–) 10.Qh5 (10...g6 11.Qg6 Ke7 12.Qf7) 1–0. Wall,Bill – Forionk, Microsoft Gaming Zone, 1999.

3.a3 c6 4.e3+=.

3.a3 e5 4.e4 Rb8 5.c4 c6 (5...bc4!? 6.Bc4 Qg5+/–) 6.cb5+– cb5 7.Be5 d6 8.Bd4 Qe7 9.Nc3 h5? (9...Nc7 10.Ba7 Rb7+–) 10.Bb5 Bd7 (10...Kd8 11.Qa4 Nc7+–) 11.Ba6 f5 12.Nge2 fe4 13.Ba7 Ra8 (13...Rd8 14.Bb6 Rb8 15.Nd5+–) 14.Nd5 Qd8 15.Bb6 Qb8 16.Nc7 Kf7 17.Qb3 Ke7 18.Nf4 Ra6 19.Na6 Qb7 (19...Qe8 20.d3 e3 21.0–0+–) 20.Ng6 Ke8 21.Nh8 Qb6 22.Qf7 (22.Qg8 Qa6 23.Ng6 Bc6+–) 22...Kd8 23.Qf8 Be8 24.b5 Qb5 25.Nf7 (25.Nf7 Kc8 26.Nd6 Kd7 27.Nb5 Ne7 28.Nc5 Kd8 29.Nd4 Kc8 30.Qe8 Kc7 31.Qe7 Kb6 32.Rb1 Ka5 33.Nc6) 1–0. Pcmvr – Roshy, playchess.de, 2004.

3.a3 Nf6 4.e3 c6 5.Nf3.

3.c3 d5 4.a4 c6 5.ab5 cb5 6.Nf3 d4 (better is 6...Nc7!?+=) 7.Nd4 e5 8.Nb5 Nf6 9.e3 Bb7 10.d4 (10...ed4 11.Qa4+–) 1–0. Wall,Bill – Freddy, internet, 2004.

3.a3 c5

4.bc5 Nc5= 5.e3 Na4 (5...a6 6.Nf3=) 6.Qc1 (6.Bd4 a6+=) 6...Nb2 7.Qb2 a6 8.Nf3 Bb7 9.Be2 Nf6 (9...Qc7 10.a4 ba4 11.Ra4=) 10.d4 (10.a4 b4 11.Qb4 Rb8+=) 10...Rc8 11.Nbd2 Nd5 (better 11...e6!?=) 12.c4+= Nb6 (12...Nc7!?+=) 13.cb5+– a5 14.0–0 e6 15.Nb3 (15.Rfc1 Rc1 16.Rc1 Be7+–) 15...a4 (15...Na4 16.Qd2 Bd5 17.Nc1+– (17.Na5?! Nc3=)) 16.Nc5! Bd5 (16...Bc5 17.dc5 Combination) 17.e4 (better 17.Rfc1+–) 17...Nc4?? (better 17...Ba8+–) 18.Qc3 (better 18.Qb1 Be4 19.Qe4 d5+–) 18...Bc5 (18...d6 19.ed5 Nb6 20.de6 f6+–) 19.dc5 (19.Bc4?! Be7 20.ed5 ed5+–; 19.ed5?! Be7 20.de6 fe6 21.Bc4 d5+–) 19...Rc5 (19...0–0 20.ed5 ed5 21.Qd4+–) 20.ed5 0–0 21.Bc4 (better 21.d6!? Qb8 22.Bc4 Rfc8+–) 21...ed5 22.Qd4 Rc4 23.Qd5 Rc3 24.Rfd1 Qf6 25.Ne5 (better 25.Qd7 Rb3+–) 25...Rfc8 (25...Rc2 26.Qd4 Rb8+–) 26.Nd7 Qh4 (26...Qf4 27.b6 Rc2 28.b7 Qf2 29.Kh1+–) 27.Ne5 (better 27.b6 Rb3 28.b7 Re8+–) 27...Qe7 (27...Qf6 28.Nc6 Re8 29.Qd7+–) 28.b6 h6 (28...Re8 29.b7 Rb3 30.Rab1+–) 29.Rab1 White prepares the advance b7 (29.b7 Re8 30.Rac1 Rb3+–) 29...R3c5 30.b7 Rb8 31.Qd6 (better 31.Qc5! Qc5 32.Nd7 Rb7 33.Nc5+–) 31...Qe5?? (better 31...Qd6 32.Rd6 Rb7+=) 32.Qe5+– Re5 33.g3 (better 33.Rd7!? Rc5 34.f3+–) 33...Re7+– 34.Rd4 Reb7 35.Rb7 Rb7 36.Ra4 g5 37.Kg2 h5 38.Ra5 f6 39.a4 Kg7 40.Ra6 (40.Rb5 Rd7+–) 40...g4 41.h3 Rb4 42.hg4 hg4 43.a5 Ra4 44.Ra7 Kg6 45.a6 Kf5 46.Ra8 Ra2 47.a7 Ra3 48.Kf1 Ra2 49.Ke1 Ke4?? (better 49...Ra3+–) 50.Re8 Kf3 51.a8Q (51.a8Q Ra8 52.Ra8+–) 1–0. amirgloo (1850) – templedrake (1845), lichess.org, 2020.

4.e4 cb4 (4...Qb6 5.Nc3) 5.Bb5 Nc5 (5...Qb6 6.Ba6 Ba6 7.ab4) 6.ab4 Ne4 7.Bc4 (7.Nc3 Ngf6) 7...Bb7 (7...e6 8.Bd4=) 8.f3= Nd6 9.Bb3 (9.Ba6 Rb8) 9...e6 10.d4 Nf6 (10...Nf5 11.Qd2=+) 11.Ne2 (11.c4 Be7=) 11...Nf5 12.Qd2 Qb6 13.c3 (13.Bc3 Bd5 14.Ra3 Bb3 15.Rb3 d5=+) 13...Bd6 (13...a5 14.0–0=+) 14.0–0 (14.Na3 Bb8=) 14...0–0 15.Na3 e5 (better is 15...Bb8=) 16.Nc4+/– Qc7 17.Qg5 (17.Ra5 ed4 18.Rf5 Bh2 19.Kh1+–) 17...e4 (better is 17...Bd5!? 18.Nd6 Nd6 19.de5 h6) 18.Qf5+– Bh2 19.Kh1 ef3 20.gf3 Rfe8 21.Rf2 Bd6 (21...d5 22.Rh2 dc4 23.Bc2+–) 22.Rg2 Nd5 (22...Be7+–) 23.Na5 (23...Re6 24.Bd5 Bd5 25.Qd5+–; 23.Nd6?! Qd6 24.Qg5 Qf6+–) 1–0. Wall,Bill – Manitou, internet, 2005.

2.Bb2 Bb7

3.a3 a5 4.Nc3=.

3.a3 a6 (--> 2.Bb2 a6 3.a3 Bb7).

3.a3 Ba6 4.d3 e5 (4...e6!?+=) 5.Be5+/– Qe7 (5...Nc6 6.Bg3+/–) 6.Bb2 (6.Bc7 d5 7.Bg3 Nf6+–) 6...Nc6 7.Nd2 Nf6 8.Ngf3 Qe6 9.g3 Bd6 10.Bg2 0–0 11.0–0 Ng4 12.Ne4 Qh6? (better is 12...Be7+/–) 13.h3+– (13.Nd6?! Qd6 14.e3 Rae8+–) 13...Nf6 14.Nf6 (14.Nd6 cd6 15.Qd2 Qd2 16.Nd2 Rfe8 17.Bf6 gf6+–) 14...gf6 15.Qc1 Rae8?? (15...Qc1 16.Rfc1 Rfe8+–) 16.Qh6 Kh8 17.Bf6 Kg8 18.Qg7 1–0. Hartmann,Elisa (1735) – Bausch,Kathy, remoteschach.de, 2005.

3.a3 e5 4.e4 Nf6 5.d3 (5.f3 c6+=) 5...Be7 6.Nf3 0–0 7.Be2 Bc6 (7...a5 8.0–0=) 8.0–0 (better is 8.Ne5!? a5 9.ba5+/–) 8...d6= 9.Nc3 Na6 (9...a5 10.Re1=) 10.Qd2 Nh5 (10...Qd7 11.Rfe1+=) 11.Rfe1 (11.a4 Bb7 12.ab5 Nb4+–) 11...Nf4 12.g3 (12.d4!?+/–) 12...Nh3 13.Kg2 Bd7 (better is 13...Ng5!?=) 14.d4+/– h6? (14...Ng5 15.de5 de5+/–) 15.Nd1?? (better is 15.de5 Rb8 16.ed6 cd6 17.Nd5+–) 15...Ng5+= 16.Ne3 Bh3 17.Kg1 Ne4 18.Qd3+/– Nf2? 19.Kf2+– e4 20.Qe4 f5 21.Qd5 Kh8 22.c4 f4 23.gf4 c6? 24.Qe4 Bh4 25.Kg1 Be1 26.Re1 Re8 27.Qg6 Re3+= 28.d5 Qb6?? 29.Bd4 Qc7 30.Be3 Rf8 31.Bd4 Rf4 32.Be3 Rg4–/+ 33.Qg4 Bg4 34.Nh4 Be2–+ 35.Re2 c5?? 36.bc5? Nc5 37.Bd4 Nb3?? 38.Bc3?? Qd8 39.Ng6?? Kh7–+ 40.Rg2 Qb6 41.Kh1 bc4?? 42.Nf8+– Kg8 43.Bg7 Qb7 44.Bh6–/+ Kh8 45.Bg7 Qg7 46.Ng6?? Kh7 47.h3 Nc1 48.h4 Qh6 49.Kh2 Nd3 50.a4 Nf4 51.Nf4 Qf4 52.Kh3 Kh6 53.Rg4 Qg4! 54.Kg4 c3 55.Kf3 c2 56.Ke2 c1Q 57.Kf3 Qd2 58.Kg4 Qd5 59.a5 Qa5 60.h5 Qe5 61.Kh4 a5 62.Kh3 a4 63.Kg2 a3 64.Kh3 a2 65.Kh4 a1Q 66.Kh3 Qf1 67.Kh4 Qg5 (67...Qef4) 0–1. pieeater – stefanW, ChessWorld.net, 2012.

3.a3 h5 4.e4+= Be4 5.Nf3 (5.Nc3 Bb7 6.Nb5 a5+=) 5...Rh6 (5...a6 6.c4=) 6.d3 (better is 6.Bb5!? c6 7.Be2+/–) 6...Bf3 (6...Bb7 7.Be2=) 7.Qf3= Nc6 (7...Na6 8.c4 bc4 9.dc4+=) 8.Be2 (8.d4 a5+=) 8...Re6 (8...e5 9.c4=) 9.0–0 (9.d4 d5+=) 9...g6 10.Nc3?? (10.d4 Bg7 11.d5 Bb2 12.de6 fe6+/–) 10...Ne5?? (better is 10...Nd4 11.Qd5 Ne2 (11...Re2?! 12.Ne2 Ne2 13.Kh1–/+) 12.Ne2 Re2 13.Qb5 Rc2–+) 11.Qe3 (better is 11.Qg3!? c6 12.Ne4+/–) 11...Nc4+= 12.Qc1 (12.Qe6 fe6 13.dc4 bc4 14.Bc4 Bg7+=) 12...Bh6–/+ 13.f4 c6?? (better is 13...Nb2 14.Qb2 Bg7–+) 14.dc4+– Qb6 (14...bc4 15.Bc4 d5 16.Bd3 Qb6 17.Kh1+–) 15.c5 Qc7 16.Bf3 (better is 16.a4 Bg7 17.Qd2 ba4 18.Nd5 (18.Na4?! Bb2 19.Nb2 Nf6+–) 18...cd5 19.Bg7+–) 16...Bf4+/– 17.Qd1 Bh2 18.Kh1 Bg3 19.Ne4 h4 20.Ng5+– Re3 21.Rb1 Qf4? 22.Nh3?? Qc4+= 23.Ng5 f6= 24.Ne4?? Re4–+ 25.Be4 Qe4 26.c3 Nh6 27.Rc1 Ng4 28.Rc2?? Ne3 29.Qc1 Nc2 30.Qh6 0–0–0 31.c4 Ne3 32.Rg1 Ng4 33.Qc1 Nf2 0–1. pieeater – themuttsknutts, ChessWorld.net, 2010.

3.Na3 a6 4.d4 d5 5.Nf3 Nf6 6.e3 Nc6 7.Bd3 (better is 7.c3!?=) 7...Nb4–/+ 8.c3 Nd3 9.Qd3 c6 10.0–0 Ne4 11.Ne5 f6 12.f3 Nd6 13.Ng4 Bc8 14.Nc2 a5 15.a3 Nc4 16.Rab1 e5 17.e4? (17.Nf2 Bd6–+) 17...Ba6?? (better is 17...de4!? 18.Qe4 f5 19.Qc6 Bd7–+) 18.ed5 Qd5 19.Qe4? (better is 19.Nge3 Ne3 20.Ne3–/+) 19...Nd2 20.Qe2 Nb1 21.Rb1 Bd6 22.c4 bc4 23.Nce3 Qe6 24.de5 fe5 25.Bc3 0–0 26.Rb6 (26.Nc2 Rab8 27.Re1 Qd5–+) 26...Bc5 27.Rb1 Rab8 28.Rd1 (28.Rb8 Rb8 29.Ne5 a4–+) 28...Rb3 (< 28...Ba3 29.Be5 Rb3 30.Bd4–+) 29.Ba5 (29.Qe1 e4 30.Bd4 Bd4 31.Rd4 ef3 32.gf3 h5–+) 29...Ra3 30.Bd8 c3 31.Qc2 h5 32.h3 (32.Kh1 hg4 33.Ng4–+) 32...hg4 33.hg4 (33.Bg5 Qf5 34.Kh1 Qg5 35.Ng4–+) 33...Be3 34.Kh2 Qh6 35.Kg3 Qf4 36.Kh3–+ Bc4 37.Be7 Ra2 38.Qg6 Qh6 39.Qh6 gh6 40.Bd6 Rd8 41.Kh4 Rg2 (better is 41...c2 42.Re1 Bf2 43.Kh3 Be1–+) 42.Re1 Re2 43.Re2–+ Bg5 44.Kg3 Be2 45.Be5 c2 46.Bb2 Rd3 (47.Kg2 Bf3 48.Kg3 Rb3–+) 0–1. IkkeIkke97 – Nylson, HCL–C2344 playchess.de, 2003.

3.a4 ba4 4.Nf3 d6 (4...Nf6!?+=) 5.Ra4+/– Bf3 (better is 5...Nf6!?+/–) 6.ef3+– e5 7.d4 ed4 (7...Nf6 8.d5+–) 8.Qd4 Nc6? (better is 8...Nf6+–) 9.Bb5 Nge7 (9...Qd7 10.Qc3 Nge7 11.Ra6+–) 10.Ra6 Qd7 (10...Rb8 11.Bc6 (worse is 11.Rc6 Rb5 12.Rc3 c5=) 11...Nc6 12.Rc6+–) 11.Rc6! Nc6 (11...Kd8 12.0–0 Nc6+–) 12.Qd5 Qe7 (12...Qe6 13.Qe6 fe6 14.Bc6 Kf7 15.Ba8 d5+–) 13.Kd2 0–0–0 14.Qc6 Qg5 15.Ke2 Qe7 16.Kd3 Kb8 17.Ba6 1–0. pcmvr – jaortiz (2385), net–chess.com, 2014.

3.a4 Nf6 4.ab5+= d5 (4...e6 5.c3+=) 5.Nf3 c6 (5...e6 6.c3+/–) 6.bc6 (6.e3 a5 7.bc6 Nc6+/–) 6...Nc6 (6...Bc6 7.Bd4+/–) 7.b5 Nb4? (better is 7...Na5+/–) 8.c3+– 1–0. Wall,Bill – SuperUltra, chess.com, 2010.

3.Nc3 Nc6 4.a3 (4.a4=) 4...f5 (4...a6!?=) 5.Nb5+/– Ba6 (5...e5 6.e3+/–) 6.c4 (6.e4 fe4 7.Qh5 g6+–) 6...Nf6 (6...Bb7 7.d4 a6 8.Nc3+/–) 7.Nf3 (7.d4+/–) 7...e5 (7...Bb7 8.d4 a6 9.Nc3+/–) 8.d4 (better is 8.Ne5!? Bb5 9.cb5 Ne5 10.Be5+–) 8...e4+/– 9.Ng5 (9.Nh4 g6 10.e3 Ng4+/–) 9...Be7? (9...Bb5 10.cb5 Nb4 11.e3=) 10.Bc3 (10.Qa4 Bb5 11.cb5 Nb4 12.ab4 Nd5+–) 10...0–0 (10...Ng4!? 11.Nh3 0–0+/–) 11.d5+/– d6?? (better is 11...Nb8+/–) 12.Ne6+– Qe8 13.Nf8 Bf8 14.dc6 Qc6 15.e3 Bb5 16.Qd4 Ba6?? 17.b5 Bb5 18.cb5 Qd7 19.Bc4 d5 20.Bb3 Qb5 21.Ba4 Qb6 22.Qe5 Bd6 23.Qe6 Kf8 24.0–0 Bh2!–+ 25.Kh2 Qe6 26.Bb4 Kf7 27.Rac1 Rc8 28.Ba5 Ne8 29.Rc6 Qe5 30.g3 d4 31.Rd1?? Qa5 32.Rc4 Nd6 33.Rcd4 Rd8 34.Bb3 Ke8 35.Ba4 Ke7 36.Kh3 c5 37.Rd5 Qa4 38.Rc5 Qa3 39.Rdc1 g5 40.g4 f4 41.R1c3 Qa2 42.Rc7 Rd7 43.Rc2 Qa4 44.Rc8 Nc8 45.Rc8 fe3 46.fe3 Qa3 (47.Rc2 Qe3 48.Kg2 Qf3 49.Kh2 Qf4 50.Kg2 Qg4 51.Kh2 Rd3 52.Rc7 Kd6 53.Rc6 Kc6 54.Kh1 Rh3) 0–1. Gregor123 – Master1, mySchach.de, 2004.

3.c4 a6 4.c5 (4.cb5 ab5 5.Nc3 e5=) 4...d6 (4...Nc6 5.a3+=) 5.Qb3 (5.a4 e5=) 5...f6 (5...dc5 6.bc5 e6 7.a4=) 6.Qh3 (6.d4!?=) 6...e5+= 7.e3 (7.d4 Nc6 8.de5 Nb4 9.ef6 Nf6 10.cd6 Bd6–+) 7...Nd7 (7...dc5 8.bc5 Bc5 9.f4–/+) 8.Bd3 (8.d4+=) 8...g6 (better is 8...e4 9.Bc2 dc5–/+) 9.Bg6+= hg6 10.Qh8 Ne7 (10...Bg2 11.Qg8 Bh1 12.Qg6 Ke7 13.d4+=) 11.Nf3+/– dc5 12.a3 Nd5 (12...cb4 13.ab4 c5 14.Ba3+/–) 13.0–0 (13.Nh4 cb4 14.Ng6 ba3 15.Na3 b4+–) 13...c4 (better is 13...cb4 14.Qh7 Ne7 15.ab4 c5+/–) 14.Nh4+– Ne7 (14...c5 15.Ng6 cb4 16.Qh5+– (16.Nf8?! Nf8 17.ab4 Nb4+/–)) 15.Nc3 Nb6 16.Qf6 Qd7? 17.Ng6 Ng6 18.Qg6 Qf7 19.Qf7 Kf7 20.f4 Re8 21.fe5 (21.fe5 Kg8 22.Rf5+–) 1–0. Wall,Bill – Dale,John, internet, 2001.

3.d3 d6 4.e4 e5 5.Be2 a6 6.Nf3 Be7 7.0–0 Nf6 8.h3 c6 9.Nbd2 Nbd7 10.a3 c5 11.Re1 0–0 12.Nf1 (12.Nb3 Qc7 13.Na5 Bc8=) 12...Rc8 (12...d5!? 13.Ne5 Ne5 (worse is 13...cb4 14.Nd7 Nd7 15.ed5+=) 14.Be5 cb4 15.ed5 Nd5+= (worse is 15...Qd5 16.Bf3 Qd7 17.Bb7 Qb7 18.ab4+/–)) 13.Ne3= Re8 14.Nf5 Bf8 15.Qd2 Qc7 16.bc5 dc5 (better is 16...Nc5!? 17.Rac1 h6=) 17.Qg5 Nb6?? (better is 17...g6+/–) 18.Nh6 (18.Be5 Re5 19.Ne5 Kh8+– (19...Qe5?? 20.Nh6 Kh8 21.Qe5+–)) 18...Kh8 19.Ne5 (19.Be5!? Qe7 20.Qh4 Ne4 21.de4 Qh4 22.Nh4 f6 23.Nf7 Kg8+–) 19...Nbd7 (19...Re7 20.Neg4 Ne8+–) 20.Nef7 1–0. residencialfil (2510) – grahamtrue (2165), net–chess.com, 2015.

3.d3 e6 4.e4 Bb4 5.Nd2 Be7?? (better 5...Nf6–/+) 6.Bg7+– Bf6 7.Bh8 Bh8 8.d4 c5 (8...Bd4 9.Bb5 Discovered attack) 9.c3 (better 9.Bb5!? Qa5 10.Bd3 Bd4 11.Rb1+–) 9...cd4+– 10.cd4 a6 (10...Bd4 11.Rc1 a6 12.Ngf3+–) 11.Rb1 (11.Ngf3 Nc6 12.Nb3 Qe7+–) 11...Bg7? (better 11...Bd4!? 12.Ngf3 Bc3+–) 12.Ngf3 White prepares e5 12...Ne7 13.e5 (13.a4 Qa5 14.Bd3 Nbc6+–) 13...Nd5 (better 13...d6+–) 14.Be2 (better 14.Qc2 f5 15.a4+–) 14...Nc3+= 15.Qc1 Nb1 16.Qb1 (worse 16.Nb1 Qa5 17.Qd2 Qd2 18.Nbd2 d6=) 16...Nc6 17.Qh7 Bf8 18.Qh5 Bg7? (better 18...Qa5 19.Ng5 Nd8+–) 19.Ng5+– Qe7 20.Qh7?? (20.Nge4 d5 21.Nd6 Kf8+–) 20...Bf8?? (better 20...Qg5 21.Bf3 d5 22.ed6 Bd4–+) 21.h4?? (better 21.Nf7 Rb8 22.Nd6 Kd8 23.Qe7 Be7 24.Nb7 Rb7 25.Bf3+–) 21...Nd4+= 22.Qd3 (22.Nf7!? Bg2 23.Rg1+–) 22...Nf5 23.Bf3 Bf3 24.Ndf3 (24.Ngf3 Rc8 25.Ke2 Qb4=) 24...Rc8 25.0–0 Qb4 26.Rd1 Qb2?? (better 26...d5 27.ed6 Qd6=) 27.Qd7 1–0. alessandrocarvalhaes (1880) – sean_moraco (1915), lichess.org, 2020.

3.d4 a5 4.ba5 b4 (4...Nf6 5.e3=) 5.d5 (5.a3 e6+=) 5...Ra5 (5...Nf6 6.Qd2 e6 7.a3 ba3 8.Ba3 Bd5 9.Bf8=) 6.e4= c6 (6...e6 7.c4=) 7.c4 (7.c3 Qb6 (< 7...cd5 8.cb4 Ra8 9.ed5+=) 8.Qb3 Nf6=) 7...c5 (7...Nf6!? 8.Nd2 cd5 9.ed5 e6=) 8.a3+= Nf6 (8...Na6 9.Nf3+=) 9.Nd2 (9.e5 Ng8+=) 9...d6 (9...ba3 10.Ba3 (< 10.Ra3 Ra3 11.Ba3 Ne4=+) 10...d6 11.Nb3=) 10.ab4 (10.Nb3 Ra8 11.ab4 cb4 12.Ra8 Ba8+/–) 10...Ra1 (10...cb4 11.Ra5 Qa5 12.Bd3+=) 11.Qa1+/– cb4 12.Qa4 Nfd7 (12...Qd7 13.Qb4 e6 14.Ngf3+/–) 13.Qb4 Qb6 (13...Nc5 14.Be2+/–) 14.Qb6+– Nb6 15.Ngf3 h6 (15...N8d7 16.Bd4+–) 16.Bd3 e5 (16...N8d7 17.Ke2+–) 17.de6 (17.c5 dc5 18.Ne5 Ba6+–) 17...fe6 18.0–0 (18.Ke2 Na4 19.Rb1 Nc5+–) 18...Rg8 (18...N6d7 19.e5 de5 20.Rb1+–) 19.Nd4 (19.Rb1!? Ba6+–) 19...e5 20.Nf5 (better is 20.Rb1 N8d7 21.Nf5+/–) 20...h5 (20...g6!? 21.Ne3 Na4+/–) 21.Ba3 Kd7 22.Rb1 Kc7 23.Bd6 Bd6 24.Nd6 Rd8? 25.c5 Rd6 26.cd6 Kc6 27.Nc4 Nc4 28.Bc4 g5 29.Bd5 Kd6 30.Rb7 Nd7 31.f3 Nc5 32.Rh7 h4 33.Rh6 Ke7 34.Rg6 Nd3 35.Rg5 Nf4 36.Re5 Kd7 37.Rf5 Ne2 38.Kf2 Nd4 39.Rh5 (39...Nc2 40.Rh4+–) 1–0. DMZagain – riverborne, Live Game Caissa's Web, 2005.

3.d4 Nc6 4.a3= a5 5.d5 (5.e4 Nf6=) 5...Nb8 (5...Na7 6.e4=) 6.e4+= ab4 (6...c6 7.dc6 Bc6 8.Nc3+=) 7.Bb5 e6 8.ab4 (8.de6 Be4 9.Qg4 f5 10.Qh5 g6+=) 8...Bb4 (8...Ra1 9.Ba1 ed5 10.ed5 Bb4 11.c3=) 9.Nd2 (better is 9.c3 Ra1 10.Ba1=) 9...ed5?? (better is 9...Ra1 10.Ba1 Qg5=+) 10.Ra8+/– (10.Bg7?! Ra1 11.Ba1 Nf6=) 10...Ba8 11.Qa1?? (better is 11.Bg7 c6 12.Bh8 cb5 13.c3+–) 11...Qg5 (better is 11...Bd2 12.Kd2 Qg5 13.Ke1 Qg2 14.Qa8 Qh1 (14...Qe4? 15.Kf1+–) 15.Qb8 Ke7 16.Ba3 Kf6 17.e5 Kg6=) 12.Qa8?? (12.c3 Qg2 13.Qa8 Qh1 14.Qb8 Ke7 15.Qc7 Qg1 16.Nf1 Bc3 17.Bc3+– (17.Qc3?! d4 18.Ba3 Kd8 19.Qa5 Kc8+–)) 12...Qd2 (12...Bd2? 13.Kf1 Qd8 14.Bg7+–) 13.Kf1 Qd1 (13...Qe1 0–1. DoubleMint – boriskarp, Live Game Caissa's Web, 2005.

3.d4 e6!? 4.a4 a5 =+.

3.d4 Nf6 4.Nc3 a6 5.d5 d6 (better is 5...e6!? 6.de6 fe6+=) 6.e4+= Nbd7 7.Bd3 Ne5 8.Nf3 Nfg4 9.h3 Nd3 10.cd3 Nf6 11.0–0 Qd7 12.Qd2 Rd8 13.Nd4 Rb8 14.f4 Rd8 15.e5?? (better is 15.a4 ba4 16.f5+/–) 15...de5 16.fe5 Nd5 17.Nd5 Qd5 18.Rf3 (better is 18.Rac1!?=) 18...e6 19.Qf4 Rd7 20.Qg5 (20.Nb3!?–/+) 20...c5 21.Raf1?? (better is 21.Nb3–+) 21...cd4 22.Qh5 (22.Rf4 f6 23.Qh5 g6–+) 22...g6 23.Qg5 Bb4 24.Qf4 Bc3 (24...Bc3 25.Qf6 Rg8–+) 0–1. billmota (2025) – grahamtrue (2185), net–chess.com, 2011.

3.d4 g5 4.d5 (4.a4+=) 4...f6 (4...Nf6!?+=) 5.e4+/– c6?? (better is 5...e6 6.Qh5 Ke7+/–) 6.Qh5 1–0. Wall,Bill – Darwish,Jawad, chess.com, 2007.

3.Bd4 Nc6!? 4.Bb2 Nb4 =+.

3.Bd4 Bd5 4.Nc3 Nc6 5.Nb5 (5.Bc5 Bc4=) 5...Nb4 (5...Rb8 6.Nc3 e6 7.Nd5 ed5 8.Bc5 Bc5 9.bc5=) 6.c3 (6.Nc3 Be6+=) 6...c6 (6...Nc6 7.Be3=+) 7.Na7 (7.cb4!? cb5 8.a4=) 7...Na2 (better is 7...e5 8.Be3 Na6–/+) 8.e4!+/– (8...Be6 9.c4+/–) 1–0. Pumphut – Graue70, Hauptsache SPASS, 2003.

3.e3 Bc6 4.Nf3 Bf3 (4...e6 5.a4 ba4 6.b5+=) 5.Qf3+/– c6 (5...Nc6 6.a3 Rb8 7.Be2+/–) 6.c4 (6.Bb5 Qb6 7.Bc4 d5+/–) 6...a6 (better is 6...bc4!? 7.Bc4 d5+=) 7.cb5+– Qb6 8.bc6 Nc6 9.a3 a5 (9...e6 10.Be2+–) 10.b5 Rb8 11.a4 (11.Qg3 f6+–) 11...Nb4 12.Na3 Rc8 13.Bc3 e6 14.Be2 Nd5 (14...d5 15.0–0+–) 15.Bd4 (15.Nc4 Rc4 16.Bc4 Nc3 17.dc3 Qc5 18.Qa8 Ke7+–) 15...Qc7 16.0–0 Bd6 (better is 16...Nge7+–) 17.Bg7 Bh2 18.Kh1 Be5 19.Be5 (19.Bh8!? Bh8 20.d4 Nb6+–) 19...Qe5 20.d4 Qd6 21.Nc4 Qc7 22.Ne5 f6?? (22...Ndf6+–) 23.Qh5 Ke7 24.Qf7 Kd6 25.Nc4 Qc4 26.Bc4 Rc4 (26...Nh6 27.Qh5 Rc4 28.Qh6+–) 27.Qf8 (better is 27.Qg7 Nde7 28.Qh8 h6+–) 27...Nde7 28.Qb8 Kd5 29.Qb7 Kd6 30.Qb6 Kd5 31.Qa5 (31.f3 Nc6 32.Rfc1 e5 33.Rc4 Nge7 34.Rc5 Ke6 35.bc6 d6 36.Ra5 Kf7+–) 31...Nh6 (31...Ke4+–) 32.b6 Ke4 33.b7 (33.f3 Ke3 34.Rae1 Kd3 35.Rd1 Kc2 36.Rf2 Kb3 37.Rd3 Rc3 38.Rc3) 33...Nhf5 (33...d5 34.f3 Kf5 35.Qa8 Ra8 36.ba8Q+–) 34.Qa8 (34.f3 Ke3 35.Rae1 Kf4 36.Qd2 Kg3 37.Re4 Ra4 38.Qf4) 34...Ra8 35.ba8Q Nd5 36.Qa6 (36.Ra3!? Nd4 37.ed4 Kd4 38.Rd1 Ke5 39.Qb8 d6 40.Re1 Re4 41.Qb2 Kf5+–) 36...h5 37.Qc4 (37.Qc4 Nde3 38.Rfe1+–) 1–0. Hal1958 – Larese, playchess.de, 2006.

3.e3 Bd5 4.Nf3 (4.Bb5?? Bg2 5.Bg7 Bg7–+) 4...a6 5.Be2 Nc6 6.0–0 Nb4 7.a3 Nc6 8.d3 Qb8 9.e4 Be6 10.Nd4 Nd4 11.Bd4 (11...d6 12.f4=) =. valpa – Little_Preacher, HCL–C1791 playchess.de, 2003.

3.e3 g5 4.Nf3 Nf6 5.Ng5 Bh6 (5...a5 6.Nf3+–) 6.Nf3+– d6? (better 6...Rg8!?+–) 7.Bb5 c6 8.Be2 (8.Bf6 ef6 9.Be2 Rg8+–) 8...Nbd7 9.0–0 e5 (9...Bg7 10.a3+–) 10.c4 a5 11.b5 cb5 12.cb5 Rc8 13.a4 Nc5 (13...Nb6 14.d4 e4 15.Nfd2+–) 14.d4 ed4 15.Nd4 Rg8 16.Bf3 Bf3 (16...Nfe4 17.Nc3+–) 17.Qf3 Nfe4 18.Nc6 Qg5 (18...Qh4 19.Qf5 (19.Na5?! Nd3+–) 19...Ra8 20.Bd4+– (20.Qh7?! Rg2 21.Kg2 Qg4 22.Kh1 Nd3 23.Qe4 Qe4 24.f3 Qe6=)) 19.Nc3 (better 19.Na5 Bg7 20.Bd4+–) 19...Rc7 (19...Nd2 20.Qh3 f5+–) 20.Ne4 Ne4 21.Rfd1 (better 21.Qe4 Kf8+–) 21...Kd7 (21...Qg6+–) 22.Rd4 (better 22.Qe4 Bf8 23.Ne5 Kd8+–) 22...Nd2 (22...Nf2 23.Kf2 f6+–) 23.Rd2 f5 24.Rad1 (better 24.Rd6! Ke8+–) 24...Bf8 25.Be5 (better 25.h4!? Qg2 26.Qg2 Rg2 27.Kg2 Be7+–) 25...Rg6 (25...Ke8 26.Bd6 Bd6 27.Rd6+–) 26.Bf4 Qh4 27.Ne5 Kc8 28.Ng6 (28.Qa8) 28...hg6 29.Bd6 (29.Qa8 Kd7 30.Qf8 Ra7 31.Rd6 Kc7 32.Rc1 Kb7 33.Qc8) 29...Rd7 30.Bg3 (30.Qa8) 30...Qc4 (30...Qh2 31.Bh2 Kd8 32.Rd7 Kc8 33.Qc6) 31.Rd7 (31.Qa8) 31...Bb4 (31...Qc7 32.Rc7 Kb8 33.Rd8) 32.Qb7 1–0. RichardSommer (1930) – arhangel_kastiel (1950), lichess.org, 2020.

3.e4 a6 4.Bd3 (4.a4 A) 4...e6 5.f3 (5.ab5 Be4 6.ba6 Na6 7.Nc3 Bb7 8.b5 Nb4 9.Ra8 Qa8 10.f3+=) 5...Nf6 6.c3 ba4 7.Ra4 c5 8.bc5 Bc6 9.Ra1 Bc5 10.d4=; B) 4...ba4 5.Nc3 (5.f3 Nc6 6.Ra4 e5 7.Bc3 Nf6 8.Bc4 d5 9.ed5 Nd5 10.Bd5+=) 5...Bc6 6.Qe2 e6 7.Qc4 Nf6 8.Qd4 Qe7 9.Ba3 d6 10.Nf3=; C) 4...Be4 5.Nc3 (5.ab5 ab5 6.Nc3 Ra1 7.Ba1 Bg6 8.Nb5 Nc6 9.c3 Nf6 10.Nf3=) 5...Bb7 6.ab5 e6 7.ba6 Ra6 8.Na4 Nf6 9.Nf3 Ra8 10.b5=; 4.Nc3 A) 4...e5 5.a3 (5.a4 Nf6 6.Nf3 Bb4 7.ab5 d6 8.ba6 Na6 9.Ba6 Ba6 10.d3=) 5...Nf6 6.Nf3 c5 7.bc5 Nc6 8.d4 ed4 9.Nd4 Bc5 10.Nb3=; B) 4...e6 5.a3 (5.a4 Bb4 6.ab5 ab5 7.Ra8 Ba8 8.Nb5 Nf6 9.Bf6 gf6 10.c3=) 5...d5 6.ed5 ed5 7.Qe2 Ne7 8.Nf3 Nbc6 9.Na2 Bc8 10.Qe3+=; C) 4...Nf6 5.a4 (5.e5 Nd5 6.Nd5 Bd5 7.a4 Nc6 8.Nf3 Nb4 9.Bc3 Bf3 10.gf3+=) 5...e5 6.Nf3 Bb4 7.ab5 d6 8.ba6 Na6 9.Ba6 Ba6 10.d3=) 4...d6 (4...Nf6 5.Qf3 (5.f3 e6 6.a4 Bb4 7.ab5 0–0 8.Qe2 ab5 9.Ra8 Ba8 10.Bb5+=) 5...e6 6.a4 Bb4 7.ab5 ab5 8.Ra8 Ba8 9.Nc3 Bc3 10.Bc3+=; 4...e5 5.a4 (5.a3 d5 6.Qe2 d4 7.Nf3 Nd7 8.a4 Bb4 9.ab5 ab5 10.Bb5=) 5...Nc6 6.ab5 Nb4 7.ba6 Nd3 8.cd3 Ra6 9.Be5 Qg5 10.Nf3+=; 4...e6 5.a3 (5.Nf3 Nf6 6.e5 Nd5 7.a3 Nf4 8.Bf1 Be7 9.d3 0–0 10.Bc1+=) 5...Nf6 6.Nc3 c5 7.bc5 Bc5 8.Nf3 d6 9.0–0 0–0 10.Re1+=) 5.Nf3 (5.a4 Nc6 6.Bc3 ba4 7.Nf3 e5 8.Ra4 Nf6 9.0–0 Be7 10.Qe2+=) 5...e5 6.0–0 (6.a4 Nc6 7.Bc3 Na7 8.Qe2 Qd7 9.ab5 ab5 10.Na3+=) 6...Nf6 7.a4 ba4 8.Ra4 (8.Nc3 Bc6 9.Re1 Nbd7 10.Bc4+=) 8...Ne4 9.Be4 (9.Qe2 Nf6 10.Bf5=) 9...Be4 10.d3 (10.d4=) 10...Bc6 11.Ra3 Qf6 12.Re1 Bf3 13.Qf3 Qf3 14.gf3 Nc6 15.b5 Nb8 16.d4 f6 17.f4 Kd7 18.f5? (better is 18.de5!? fe5 19.fe5 de5 20.Rd3 Bd6 21.Re5=) 18...Be7 19.Ra4 c6 20.Nc3 cb5 21.Raa1 Nc6 22.Ne2 (22.Nd5 Bd8–+) 22...a5 23.d5 (23.Bc3 b4 24.d5 bc3 25.dc6 Kc6–+) 23...Nb4 24.Red1 Nc2 25.Rab1 (25.Rac1 Nb4–+) 25...b4 26.Bc1 Rhc8 27.Rd2 Rc4 28.Rb2 Nd4 29.Ng3 (29.Rd1 Ne2 30.Re2–+) 29...Rc1 30.Kg2 Rac8 31.Nh5 Bf8 32.f4 Nf5 33.Re2 (33.Kf2 Rh1 34.Kg2 Ne3 35.Kh3 Nc4–+) 33...Nd4 34.Rf2 R8c2 35.Kg3 b3 36.h4 Rf2 37.Kf2 a4 (37...Rc2 38.Ke3 Rb2 39.fe5 de5 40.Ng3–+) 38.Ng3 Rc2 39.Rc2 bc2 40.Ne2 Ne2 41.Ke2 c1Q 42.f5 0–1. gordiemac – Mr.Oldenslo, ChessWorld.net, 2011.

3.e4 Nf6 4.Bb5 Be4 5.Nf3 e6 6.Nc3 Bb7 7.a3 Be7 8.0–0 0–0 9.Qe2 d6 10.d3 Nbd7 11.Nd4 c5 12.bc5 Nc5 13.Rfe1 Qc7 14.Nf5 Nd5?? (better is 14...Bd8 15.Ng3 a6–/+) 15.Nd5+– (15.Ne7?! Qe7 16.Nd5 Bd5+=) 15...Bd5 16.Qg4 g6 (16...Bg5 17.Bg7 Qd8+–) 17.Nh6 1–0. capablancaven – atul (1700), gameknot.com, 2011.

3.f3 e5 4.e4 Bb4 5.Be5 Nf6 (5...f6 6.Bf4 a6 7.a4+=) 6.Bc3 (6.c3 Be7 7.Bb5 Nc6 8.Bc6 Bc6+=) 6...Nc6 (Better is 6...Bc3!? 7.Nc3 a6=+) 7.Bb5+= Qe7 8.a3 Bc3 9.Nc3 Nd4 10.Bc4 d5= 11.Bd3 de4–/+ 12.fe4 Ne4 13.Qe2?? Ne2–+ 14.Nce2 Qh4 15.g3 Qf6 16.Rb1 Qf2 17.Kd1 Qf1 0–1. MasterofDisaster – garlicpapper6, Live Game Caissa's Web, 2004.

3.f3 f5 4.e3 (4.e4 e6+=) 4...a6 5.Bd3 (5.Ne2 e6 6.a3 Nf6=) 5...e6 6.Ne2 (6.e4 A) 6...Bb4 7.Bg7 fe4 8.Bh8 (8.Be4?! d5+–) 8...ed3 9.cd3+=; B) 6...Qg5 7.Qe2 fe4 8.Be4 Be4 9.Qe4 Nc6=) 6...Nf6 (6...Qh4 7.Ng3–/+) 7.0–0 (7.a3 c5 8.bc5 Bc5=) 7...Nc6 (better is 7...Bb4!? 8.a4 ba4 9.Ra4 Bd6–/+) 8.a3= Be7 9.c4 bc4 10.Bc4 0–0 11.d4 Na7 (11...a5 12.b5 Nb8 13.Nf4+=) ½–½. Bets,Anatolij (2405) – Podgurkii,Stepan (2250), Bucharest–B, 1994.

3.f3 f6 4.e4 e5 5.Bb5 Bb4 6.Ne2 Ne7 7.a3 Ba5 8.c3 0–0 9.Qb3 Kh8 10.Bd3 (10.d4 ed4 11.Nd4 c5=) 10...Ba6 11.Ba6 Na6 12.Qb5 Rb8?? (better 12...Qb8 13.a4 c6 14.Qb8 Rab8=) 13.Qa5 Rb2 14.Qa6 Qb8 15.0–0 Nc6 16.c4 Qb3 17.Qb5! Qb5 18.cb5 Rb5 19.Nbc3 Rbb8 20.Nd5 Rb2 21.Nc7 Rd2 22.Nc3 Rb8 23.N3d5 (23.Rfb1 Rbb2 24.Rb2 Rb2+–) 23...Nd4 24.a4 Rbb2 25.Ne3 g6 26.Rab1 Ra2 27.Rb8 Kg7 28.Rd8 (28.Ncd5 f5 29.Rb7 Ra4 30.Rd7 Kh6 31.ef5 Nf5 32.Ng4 Kg5+–) 28...f5? (better 28...Nc6 29.Rc8 Ra4 30.Ne6 de6 31.Rc7 Kf8 32.Rc6 h5+–) 29.Rd7+– Kh6 30.ef5?? (30.Ncd5 Ra4 31.Re7 Ne2 32.Kh1 Nd4+–) 30...Nf3?? (better 30...Ne2 31.Kh1 Rd7–/+) 31.gf3 (31.Rf3 Rd7 32.Ne6 Ra1 33.Kf2 Ra2 34.Kg3+–) 31...Rd7+– 32.Ne6 gf5 33.Nf5 Kh5 34.Ng3 Kh4 35.Re1 Rdd2?? (better 35...h6 36.Ne4 Rd3+–) 36.Re4 Kh3 37.Ng5 1–0. beatmeeasy (1995) – TomasB75 (1920), lichess.org, 2021.

3.Nf3 d5 4.g3 (4.e3!? a6 5.a4+=) 4...e6 5.Bg2 Nf6 (5...Bb4?? 6.Bg7 Nf6 7.Bh8+–) 6.0–0 (6.a4!?=) 6...Bb4–/+ 7.Ba3 (7.Nc3 a6–/+) 7...Ba3 8.Na3 (8...a6 9.d4–/+). chrisalvin2005 – oasis, chessHere.com, 2006.

3.Nf3 h5 4.e3+= f5 (better is 4...a6!?+=) 5.Bb5+– Rh6 (5...e6 6.0–0+–) 6.Bc4 (6.0–0 a6 7.Bc4 Nf6+–) 6...Nf6 7.Ng5 (better is 7.0–0!?+–) 7...Bg2?? (better is 7...e6+=) 8.Bf7 1–0. Wall,Bill – Woolley,Richard, internet, 2001.

3.f4 e5=+ 4.Nf3 (4.fe5 Qh4 5.g3 Qb4=+) 4...ef4–/+ 5.a3 a5 6.e4 fe3 7.Qe2 Qe7 8.Qe3 Qe3 9.de3 ab4 10.ab4 Ra1 (11.Ba1 Bb4 12.Nbd2 Nf6 13.Bb5 Ne4–/+) –/+. Kingslayer2 – marekt (2015), ChessWorld.net, 2003.

3.h3 f5 4.f4?? (better is 4.e4!? fe4 5.Qh5 g6 6.Qb5+=) 4...Nc6 5.c3 (5.e3 e5 6.Qh5 g6=) 5...g6 (5...e5!? 6.e3 Qh4 7.Ke2 ef4 8.Nf3–/+) 6.d3 Nf6 7.Rh2 e5 8.g3 e4 9.d4 a5 10.e3 ab4 11.c4? (better is 11.Bb5!? Nd5 12.Qe2–/+) 11...bc4–+ 12.Bc4 Na5 13.Be2 h6 14.Bb5 Nd5 15.a3? (15.Kf2 Ba6 16.Ba6 Ra6–+) 15...Ne3 16.Qe2 Nd5 17.Bc4 Nc4 18.Qc4 g5 19.ab4 Nb4 20.Ra8 Qa8 21.Qc7 Nd3 22.Kd1 Qa4 23.Ke2 Nb2 24.Qb7 Qc2 25.Nd2 Rh7 26.Rf2?? gf4 27.Rf4 h5 28.Rf5?? Rg7 29.Qb8 Ke7 30.Qf8 Ke6 31.Qf6 (31.Qg7?! Qd1 32.Kf2 Qd2 33.Kf1 Kf5 34.Qd7 Kf6 35.Qd6 Kg7 36.Qe7 Kg8 37.Qe4 Nd3+–) 1–0. pekindragons – bagboy, gameknot.com, 2011.

3.a3 d6

4.d4 Nf6 5.Nf3 e6 6.e3 Be7 (6...c6 7.c4 bc4 8.Bc4=) 7.Bd3 (7.Bb5 Nbd7+/–) 7...0–0 (7...a6 8.0–0=) 8.0–0 (8.Bb5!? a5 9.ba5 Ra5 10.Bd3+/–) 8...a6 9.Re1 (9.a4 ba4 10.Ra4 c5=) 9...Nc6 (9...c5!?=) 10.e4 h6 11.Nbd2 Re8 12.Nf1 Na7 13.Ne3 (13.Ng3!?+=) 13...c5 (13...Be4 14.Be4 Ne4 15.d5+=) 14.e5 (14.bc5 dc5 15.e5 Nh5=) 14...de5+= 15.Ne5 (better is 15.de5 Nd7 16.bc5 Nc5 17.Nd4+=) 15...Nc6?? (better is 15...cb4 16.a4 Qb6–/+) 16.Bc1?? (better is 16.dc5 Ne5 17.Be5+/–) 16...Nd4 (better is 16...Qd4!? 17.Nc6 Qa1 (17...Bc6?! 18.Rb1–+) 18.Ne7 Re7 19.bc5 Qc3–+) 17.c3 (17.Bb2 Qc7 18.bc5 Bc5–/+ (18...Qc5? 19.Bd4 Qc7 20.c4+–)) 17...Nc6 18.bc5?? Ne5–+ 19.Bc2 Bc5 20.Bb2 Ng6 21.Rb1 Qc7 22.Qd3 Rad8 23.Qe2 Nf4 24.Qf1 Be3 25.Re3 Ng2 26.Rg3 Nh4 27.Bc1 Qc6 28.f3 Ng6 29.Bg6 fg6 30.Rb3 g5 31.Qe2 Nh5 32.Rg4 Qd5 (32...Qd5 33.c4 Qd1 34.Qd1 Rd1 35.Kf2 Rc1 36.cb5 Rc2 37.Ke1 Rd8–+) 0–1. pieeater – keeder, ChessWorld.net, 2010.

4.e3 c6 5.c4+=.

4.e3 Nf6 5.Nf3 (5.Bb5 c6 6.Be2 a5+/–) 5...e5 6.Bd3?? (better is 6.Bb5 c6 7.Be2+/–) 6...e4–/+ 7.Bf6 (better is 7.Bb5!? c6 8.Ba4 ef3 9.Qf3–/+) 7...Qf6–+ 8.c3? (8.Bb5 c6 9.Nd4 cb5–+) 8...ef3 (8...ed3!? 9.a4 ba4 10.Ra4–+) 9.g3 a6 10.–0 Bc8 (10...Nd7 11.Re1–+) 11.e4 (11.a4 d5–+) 11...Bg4 12.Ra2 (12.a4 ba4 13.Bc4 Be7–+) 12...Bh3 13.Re1 Bg4 14.c4?? (14.Rf1 Be6 15.Ra1–+) 14...Qh6 (14...Be7 15.cb5 Be6 16.Rc2–+) 15.Bf1 Be7 16.c5? 0–0 17.Kh1 Nc6 18.d4 Rfb8 19.d5 Ne5 20.c6 Bg5 21.Rc2 Bh3 22.Nd2 g6 23.Nf3 Re8 24.Bh3? Qh5?? 25.Bd7?? Nd7?? 26.cd7+– Red8 27.Rc7 Kg7 28.e5 de5 29.Re5 f6 30.Re7 Kf8 31.d6 f5 32.Kg2 Be7 33.de7 Ke7 34.Qe1 Kf7 35.Ne5 Kf6?? 36.Rc6 Ke7 37.Ng6 Kd7 38.Qe6 1–0. pieeater – gordiemac, ChessWorld.net, 2011.

4.Nf3 Nf6 5.e3 e5 6.Bb5 c6 7.Ba4 Be7 8.0–0 0–0 9.d3 Ba6 10.c4 Qc7 11.Re1 c5 12.b5 (12.Nbd2 Nbd7+–) 12...Bc8 13.e4 (13.d4!? Nbd7 14.Bc2+–) 13...Bd7 14.Nbd2 Bg4 (14...Qb6 15.Bb3+–) 15.h3 (15.Rb1 Nbd7+–) 15...Bh5 (15...Bc8 16.Bc3+–) 16.Qe2 Qa5 17.Bc2 Nbd7 18.Qe3 Rfb8 19.a4 Nb6 20.Nh4 g6 (20...Rb7 21.f4 Re8 22.g4 Ng4 23.hg4 Bh4 24.gh5 Be1 25.Nb3+– (25.Re1?! Na4 26.Ra1 Qb4 27.Be5 de5 28.Ba4 Qc3+–)) 21.Ndf3 (21.Ra3 Nbd7+–) 21...Rd8 (21...Bf3 22.Nf3 (22.gf3?! Nh5 23.Ng2 Nf4+=) 22...Nbd7 23.Bc1+–) 22.Rac1 (22.Ra3 Nbd7+–) 22...Qb4 (22...a6!?+–) 23.Rb1+– Na4? (23...Qa5 24.Bc1 Qc3 25.Bb3 Bf3 26.Nf3+– (26.gf3?! Nbd7+–)) 24.Be5! Qa5 (24...de5 25.Rb4) 25.Bf6 Bf6 26.d4 (26.g4 Nc3 27.Ra1 Ne2 28.Qe2 Ba1 29.gh5 a6 30.hg6 hg6 31.ba6 Ra6+–) 26...Bd4? (26...Nc3 27.Ra1 Qb4+–) 27.Qf4?? (better 27.Nd4 cd4 28.Qa3+–) 27...Nc3 (better 27...Bc3 28.Rf1 Bf3 29.Nf3 Nb2+=) 28.Ra1?? (28.Rb3 Na2+–) 28...Qb4?? (better 28...Qa1! 29.Qd2 Qa2 30.Nd4 cd4–+) 29.Ng5?? (better 29.Nd4 cd4 30.Bd3+–) 29...Rd7 (29...f6 30.Ne6 Ne2 31.Re2 Ba1=+) 30.Nf5? The backward pawn on d6 becomes a target (better 30.g4 Qc4 31.Qd2 Qb5 32.gh5 Ne2 33.Kh1 Ba1 A) worse 34.Re2 a5–/+ (34...gh5?! 35.Nf5+=); B) 34.Ra1=) 30...Be5 (30...Ne2!? 31.Re2 Ba1 32.g4–+) 31.Qh4 Qc4 32.Nh6 Kg7 33.Ngf7 (better 33.Nf5 gf5 34.Qh5–+) 33...Ne2 (33...Qb5?! 34.Ne5 de5 35.Nf5 Kf7 36.Ne3=; worse 33...Nb5 34.Ne5 de5 35.Bd1 Bd1 36.Red1–/+) 34.Kh1 (34.Re2 Ba1 35.Rd2 Rf7 36.Nf7 Qf7 (36...Kf7?! 37.g4–/+) 37.Rd6 Bd4–+) 34...Qc2 (better 34...Ba1 35.Ra1 Qc3–+) 35.Ne5 de5 36.Ng4 Do you see the mate threat? 36...Bg4 (better 36...Rf8!? 37.Qg5 Qe4 38.Qe5 Qe5 39.Ne5–+) 37.Qg4 Rd2 38.Ra6? (38.Qg5 Kf7 39.Ra6 Kg8 40.Rg6 hg6 41.Qg6 Kf8 42.Qh6 Ke7 43.Qh7 Kd6 44.Qg6 Kd7 45.Qc6 Ke7 46.Qa8 Nf4–/+) 38...Qc4 (38...Rd1 39.Ra1 Ra1 40.Ra1–+) 39.f3?? (better 39.Rea1 Rad8 40.Ra7 Kg8 41.Qh4–+) 39...Qb5 40.Re6 c4 (better 40...Re8 41.Ra1 Ra2–+) 41.Qg5?? (41.Re7 Kh8 42.Qg5 Ng3 43.Kh2 Rg2 44.Kg2+–) 41...Re8?? (41...Qb4 42.Re7 Kg8 43.Qe5 Ng3 44.Kh2 Rg2 45.Kg2 Qd2 46.Kg3 Qe1 47.Kg2 Qd2 48.Kg3 Qe1 49.Kg2 Qe2 50.Kg3 Qe1=) 42.Qf6?? (better 42.Re8 Qe8 43.Qd2+–) 42...Kg8–+ 43.Re8 Qe8 44.Kh2 (44.Qa6 Qf7 45.Qc8 Kg7 46.Qb8–+) 44...c3 45.h4 (45.Qa6 c2 46.Qb7–+) 45...c2 46.Kh3 (46.Qa6 Qd8 47.Qe6 Kf8–+) 46...Rd1 (46...Nf4 47.Qf4 ef4–+) 47.Rd1 cd1Q 48.g3 (48.Qe5 Qe5 49.f4 Qc3 50.g3 Qg3) 48...Qe1 49.Qg5 (49.Qh8 Kh8 50.Kg2 Qg1 51.Kh3 Qg3) 49...Qf1 (49...Qe6 50.Kg2 Qg1) 50.Kg4 White prepares h5 50...Qe6 (50...Qd7 51.Qf5 gf5 52.Kg5 Qg7 53.Kf5 Nd4) 51.Qf5 gf5 52.ef5 Qc4 (52...Qf7 53.h5 Qg7 54.Kh4 Qg3) 53.Kg5 Qf7 54.h5 (54.g4 Qc1 55.f4 Qf4) 54…Qf3 (54...Qf3 55.g4 Qe7 56.f6 Qef6; 54...Qg7 55.Kh4 Qg3) 0–1. pieeater – gordiemac, ChessWorld.net, 2011.

3.a3 e6

4.e3 a6 5.Nf3 c5 (5...Nf6 6.Nc3=) 6.c3 (6.bc5!? Nf6 7.d4+/–) 6...c4 7.Be2 Nf6 8.0–0 Be7 9.Nd4 (9.d3!? d5 10.a4=) 9...0–0 10.Re1 (10.d3 cd3 11.Bd3 Nc6+=) 10...e5 (10...Nc6 11.d3 cd3 12.Bd3+=) 11.Nf3 (11.Nf5 Be4 12.Ne7 Qe7+=) 11...d6 (better is 11...Nc6–/+) 12.d3?? (12.a4+=) 12...e4?? (12...cd3 13.Bf1 e4 14.Nd4–+) 13.Nd4?? (better is 13.de4 Ne4 14.Nbd2=) 13...cd3–+ 14.Bg4 Ng4 15.Qg4 Bf6 16.Nd2 d5 17.a4 Bd4 (17...ba4!? 18.Ra4 Nc6 19.Nc6 Bc6 20.Ra2–+) 18.ed4 f5 19.Qf4 Nc6 20.a5 (20.Nb3 ba4 21.Nc5 Rf7–+) 20...Qe7 21.Bc1 g5 22.Qg3 Kh8 Black plans f4 23.h3 Bc8 24.Nb3 f4 25.Qh2 Ra7 26.Nc5 Bf5?? (26...Qf6 27.Bd2–+) 27.Bd2? (27.Nd3 Rf6+=) 27...Bg6 (27...Qf6 28.h4 gh4 29.Bf4–+) 28.Kh1? (28.h4 gh4 29.Nd3 f3–/+) 28...Nd8?? (better is 28...Qf6–+) 29.Nd3+= Ne6 30.Ne5 Qe8 31.h4 gh4 32.Qh4 Kg7 (32...Rg7 33.g4–/+) 33.Kh2 Rf5 34.g4 fg3 35.Qg3 Rh5 36.Kg2 Kh8 37.Rh1?? (better is 37.Ng6 Qg6 38.Qg6 hg6 39.Rh1=) 37...Rh1?? (better is 37...Rg7 38.Bh6 Rh6 39.Rh6 Bh5 40.Ng6 Bg6–+ (40...Rg6?! 41.Rg6 hg6 42.Qe5 Kh7 43.Rh1–+)) 38.Rh1+/– Rg7 (38...Bh5!? 39.Bh6 Be2+/–) 39.Bh6+– Rg8 40.Kf1 Bh5?? (40...Ng7 41.Bg5 h5 42.Bf6+–) 41.Qh3 (better is 41.Qh4 Ng7 42.Rg1+–) 41...Bg6+/– 42.Be3 Rf8 43.Rg1 Kg8 44.Qh6 Rf6 45.Qh4 Kg7?? (better is 45...Rf8+/–) 46.Bh6 1–0. grahamtrue (2165) – pushtiu (2245), net–chess.com, 2015.

4.e3 Nf6 5.Bb5?? Bg2–+ 6.f3 Bh1 7.Kf2 (7.Nh3 c6 8.Be2 Nh5–+) 7...c6 8.Be2 Qc7 9.f4 a5 10.c4 (10.Nh3 Be4 11.ba5 Be7–+) 10...ab4 11.d3 c5 (11...ba3 12.Nh3 a2 13.Nd2–+) 12.Nh3 (12.Bf6 gf6 13.Nf3 Bf3 14.Bf3 Nc6–+) 12...Bb7 13.Qg1 Nc6 14.Qg5 (14.Ke1 Qb6–+) 14...Be7 15.Qg7 Rg8 16.Qh6 (16.Bf6 Rg7 17.Bg7 Bh4 18.Kf1–+) 16...Rg6 17.Qh4 (17.Qg6 hg6 18.Bf3 Qb6–+) 17…Ne4! (17...Ne4 18.de4 Bh4 19.Kf1 Qb6–+) 0–1. guest6914 – Fournier,Frederic, Active, 2005.

4.e3 Nf6 5.Nf3 a6 6.c4 bc4 7.Bc4=.

4.e4 a5 A) 5.f3 A1) 5...ab4 6.Bb5 (6.ab4 Ra1 7.Ba1 Nf6 8.Bb5 Bb4 9.Ne2 c6 10.Ba4 0–0 11.Bd4=) 6...Nf6 7.Nh3 Ra5 8.c4 ba3 9.Na3 Bc5 10.d4 Bb4 11.Kf2=; A2) 5...Nf6 6.Bb5 (6.Nh3 c6 7.ba5 Ra5 8.c4 bc4 9.Bc4 d5 10.Bd3 de4 11.Be4+=) 6...ab4 7.Nh3 c6 8.Be2 d5 9.Nf2 ba3 10.Na3 Qb6 11.Ra2=; A3) 5...c6 6.ba5 (6.a4 ab4 7.ab5 Ra1 8.Ba1 d5 9.ed5 Qd5 10.Bd3 cb5 11.Be4+=) 6...Ra5 7.c4 bc4 8.Bc4 d5 9.Bd3 c5 10.Bc3 Ra8 11.ed5=; B) 5.Bb5 B1) 5...Qg5 6.Be2 (6.Bf1 Be4 7.Nh3 Qf5 8.d3 Bc6 9.ba5 Nf6 10.Nd2 Qa5 11.d4+=) 6...Qg2 7.Bf3 Qg6 8.Nc3 ab4 9.ab4 Ra1 10.Qa1 Nc6 11.Na2=; B2) 5...ab4 6.f3 (6.Qf3 Nf6 7.Bd3 Ra4 8.c4 Nc6 9.Bc2 Ra5 10.Qb3 Ra6 11.Qe3+=) 6...Nf6 7.Nh3 c6 8.Be2 d5 9.Nf2 ba3 10.Na3 Qb6 11.Ra2=; B3) 5...Be4 6.Qg4 (6.f3 Bf5 7.h4 c6 8.Be2 h5 9.ba5 Qc7 10.Kf2 Bc5 11.d4+=) 6...Bc2 7.Bg7 Nh6 8.Bh6 Bh6 9.ba5 c6 10.Be2 Ra5 11.Qg3+=; C) 5.Nc3 Nf6 (5...ab4 6.ab4 Ra1 7.Qa1 Bb4 8.Nb5 f6 9.Qa7 Qc8 10.Qe3 Na6 11.Be2+=) 6.Bb5 (6.Nb5 Ne4 7.f3 c6 8.Nc7 Qc7 9.fe4 c5 10.bc5 Be4 11.d3+=) 6...ab4 7.ab4 Ra1 8.Qa1 Bb4 9.Bd3 Nc6 10.Nf3 0–0 11.Na2=; D) 5.ba5 D1) 5...Bc6 6.Nc3 (6.Nf3 Ra5 7.Nc3 Qf6 8.Bd3 Na6 9.Rb1 Qg6 10.0–0 b4 11.ab4+=) 6...Ra5 7.Nf3 Qf6 8.Rb1 Qf4 9.g3 Qg4 10.Be2 Qh5 11.d4+/–; D2) 5...Be4 6.Nc3 Bc6 7.Nb5 Nf6 8.Nd4 Be4 9.Ngf3 Bc5 10.Nb3 Be7 11.d3=; D3) 5...Ra5 6.Nc3 (6.Bc3 Ra4 7.Bb5 Re4 8.Kf1 Qg5 9.Bd3 Re1 10.Ke1 Qg2 11.Ke2–/+) 6...Bc6 7.Nf3 Nf6 8.Nd4 b4 9.ab4 Ra1 10.Ba1 Bb4 11.e5=.

4.e4 a6 A) 5.e5 A1) 5...Nc6 6.Nf3 (6.c4 bc4 7.Nf3 f6 8.ef6 Nf6 9.Bc4 Be7 10.0–0 0–0 11.Nc3=) 6...d6 7.ed6 cd6 8.c4 bc4 9.Bc4 Nf6 10.0–0 Be7 11.Nc3=; A2) 5...f6 6.d4 (6.Nf3 fe5 7.Ne5 Nf6 8.f4 Be7 9.c4 0–0 10.Nc3 bc4 11.Nc4+=) 6...Be7 7.Nf3 Nh6 8.c4 bc4 9.Bc4 0–0 10.d5 fe5 11.Ne5+=; A3) 5...d6 6.ed6 (6.Nf3 de5 7.Be5 Nd7 8.Bc3 Ngf6 9.Be2 Bd6 10.a4 ba4 11.Ra4+=) 6...Qd6 7.Nf3 Nd7 8.c4 bc4 9.Bc4 Rd8 10.Qa4 Qf4 11.Be2=; B) 5.Qf3 B1) 5...d5 6.e5 (6.ed5 Bd5 7.Qe2 Nf6 8.Nc3 Bb7 9.Nf3 Bd6 10.Ng5 0–0 11.Nce4+=) 6...Nd7 7.d4 Nb6 8.Bd3 Nc4 9.Bc4 bc4 10.Ne2 a5 11.ba5=; B2) 5...Nf6 6.d3 (6.Bf6 Qf6 7.Qf6 gf6 8.Nc3 c5 9.bc5 Bc5 10.Nge2 Nc6 11.Nc1+=) 6...c5 7.bc5 Bc5 8.Ne2 d5 9.e5 Nfd7 10.d4 Be7 11.Nf4=; B3) 5...c5 6.a4 (6.bc5 Nf6 7.Bf6 Qf6 8.Qf6 gf6 9.c4 bc4 10.Nc3 Bc5 11.Bc4+=) 6...ba4 7.bc5 Nf6 8.Nc3 Bc5 9.Na4 Be7 10.Bd3 d5 11.e5=; C) 5.Nc3 C1) 5...Be7 6.Nf3 (6.Qg4 Bf6 7.Nf3 Nh6 8.Qf4 0–0 9.Be2 d6 10.d4 Nc6 11.e5=) 6...Nf6 7.Bd3 0–0 8.0–0 c5 9.e5 Nd5 10.bc5 Nc3 11.Bc3=; C2) 5...Nf6 6.d3 (6.e5 Nd5 7.Nf3 c5 8.bc5 Bc5 9.Ne4 Be7 10.Bd4 0–0 11.c4=) 6...d5 7.e5 Nfd7 8.d4 c6 9.Bd3 a5 10.Na2 Be7 11.Ne2=; C3) 5...d5 6.ed5 ed5 7.Qe2 Ne7 8.Nf3 Nbc6 9.d4 Qd6 10.Na2 Bc8 11.c3=; D) 5.f3 D1) 5...Nf6 6.d4 (6.Nh3 Be7 7.Be2 d5 8.e5 Nfd7 9.d4 0–0 10.0–0 Nb6 11.Nf4=) 6...Be7 7.Bd3 0–0 8.Ne2 a5 9.0–0 ab4 10.Bb5 d5 11.e5=; D2) 5...Nc6 6.Nh3 (6.d4 d5 7.Bd3 Be7 8.e5 Nh6 9.Ne2 Bh4 10.g3 Be7 11.Bc1=) 6...d5 7.Bd3 de4 8.Be4 Nf6 9.0–0 a5 10.Qe2 Nd4 11.Qd3=; D3) 5...d5 6.ed5 ed5 7.Qe2 Ne7 8.a4 ba4 9.Nc3 Nbc6 10.Ra4 Rb8 11.Na2=.

4.e4 Be4 5.Nc3 Bf5 (5...Bc6 6.Nb5 a5 7.Nf3 Nf6 8.ba5 Be7 9.Nbd4 0–0 10.Nc6 Nc6 11.a6=; 5...Bb7 6.Nb5 a5 7.ba5 Ra5 8.Nf3 Nf6 9.Be5 Na6 10.d4 Be4 11.Qd2=) 6.Nb5 (6.Bb5 Nf6 7.Nf3 a5 8.ba5 Bc5 9.Nh4 Bg4 10.f3 Bh5 11.Qe2=) 6...Nc6 7.Nf3 a5 8.ba5 Nf6 9.Ne5 Na5 10.Nd4 Be4 11.f3=.

4.e4 Be4 5.Nf3 Nf6 (5...a6 6.Be2 (6.c4 bc4 7.Bc4 d5 8.Nc3 Bf3 9.Qf3 Qf6 10.Be2 Qf3 11.Bf3–/+) 6...d5 7.0–0 Nf6 8.Ne5 Bd6 9.a4 d4 10.Bd4 Bg2 11.Kg2=; 5...c6 6.a4 (6.Nc3 Bf5 7.Be2 a5 8.ba5 d5 9.Nd4 Bg6 10.0–0 Bd6 11.Nb3–/+) 6...Na6 7.c3 Nc7 8.ab5 cb5 9.Na3 Qf6 10.Nd4 a6 11.Qe2+=; 5...Bc6 6.Nc3 a6 7.Be2 Be7 8.0–0 Nf6 9.Re1 0–0 10.Nd4 d5 11.Bf3–/+) 6.Bd3?? (6.Bb5 c6 (6...c5= 7.Nc3 cb4 8.Ne4 Ne4 9.ab4 Bb4 10.Ra4 a5 11.Qa1=) 7.Be2 a5 8.b5 d5 9.Nc3 Bf3 10.Bf3 Bd6 11.Rb1=) 6...Bd6?? (6...Bd3 7.cd3 a5 8.ba5 Ra5 9.a4–+) 7.Nc3?? (7.Bf6 Bf3 8.Qf3 Qf6 9.Qa8 Qa1 10.Qb8 Ke7 11.Qh8 Qb1 12.Ke2 Qh1 13.Qg7 Qh2 14.Qg5 Ke8 15.Qb5 c5=) 7...Bf3?? (better is 7...Bd3 8.cd3 c6–/+) 8.Qf3+= c6 9.0–0 (9.Nb5 Be7+=) 9...0–0 (9...Na6 10.Ne4 Be7 11.Rfb1+=) 10.Rfe1 (10.Nb5 Be7+=) 10...Qc7 11.g3 Re8?? (11...Na6 12.h3+=) 12.Ne4 Be5? 13.Be5?? Qe5= 14.c3 Qf5?? 15.Qf5+– ef5 16.Ng5 h6 17.Re8 Ne8 18.Nh3 Nf6 19.Nf4 d5 20.Kg2 Nbd7 21.h3 g5 22.Nh5?? Nh5–+ 23.Bf5 Ndf6 24.d4 Re8 25.g4 Nf4 26.Kg3 Re2 27.a4 a6 28.ab5 ab5 29.Ra6 Rd2 30.Rc6 Rd3 31.f3?? Rd1 32.Rf6 Rg1 33.Kf2+= Rh1 34.Rb6 Rh3 35.Rb5 Rh2 36.Kg3?? Rc2 37.Bc2+– Kg7 38.Rc5 Kf8 39.b5 Ke7 40.b6 Ne6 41.Rc6 Nd8 42.Rc7 Kd6 43.Bh7 Ke6 44.b7 Nb7 45.Rb7 Kf6 46.Rd7 Ke6 47.Ra7 f6 48.f4 Kd6 49.Bg8 Kc6 50.Rf7 Kd6 51.Rf6 Ke7 52.Rh6 Kf8 53.Bd5 Kg7 54.fg5 Kf8 55.c4 Ke8 56.c5 Kd8 (56...Ke7 57.Rh7 Kd8 58.g6 Ke8 59.g7 Ke7 60.g8Q Kf6 61.Qg7) 1–0. pieeater – gordiemac, ChessWorld.net, 2011.

4.e4 Nf6 A) 5.Bb5 A1) 5...Be4 6.Nf3 c6 7.Be2 a5 8.b5 d5 9.Nc3 Bf3 10.Bf3 Bd6 11.Rb1=; A2) 5...a6 6.Bd3 (6.Be2 Ne4 7.Nf3 c5 8.d3 Nf6 9.c3 Be7 10.0–0 d5 11.Re1=) 6...a5 7.b5 Ne4 8.Be4 Be4 9.Nf3 Bd6 10.0–0 0–0 11.Re1=; A3) 5...Ne4 6.Nf3 a5 7.0–0 ab4 8.ab4 Bb4 9.Ra8 Ba8 10.Bg7 Rg8 11.Bd4=; B) 5.Nf3 B1) 5...a6 6.e5 (6.d3 Be7 7.e5 Ng4 8.h3 Nh6 9.d4 0–0 10.Bd3 d6 11.0–0=) 6...Nd5 7.c4 bc4 8.Bc4 a5 9.b5 Be7 10.0–0 0–0 11.Nc3=; B2) 5...Be4 6.Bb5 c6 7.Be2 a5 8.b5 d5 9.Nc3 Bf3 10.Bf3 Bd6 11.Rb1=; B3) 5...Ne4 6.Bb5 a5 7.0–0 ab4 8.ab4 Bb4 9.Ra8 Ba8 10.Bg7 Rg8 11.Bd4=; C) 5.f3 C1) 5...a6 6.d4 (6.Nh3 Be7 7.Be2 0–0 8.0–0 d5 9.e5 Ne8 10.d4 Qd7 11.Bd3=) 6...Be7 7.Bd3 0–0 8.Ne2 a5 9.0–0 ab4 10.Bb5 d5 11.e5=; C2) 5...a5 6.Bb5 (6.ba5 Ra5 7.Bc3 b4 8.ab4 Ra1 9.Ba1 Bb4 10.Bc3 Bc3 11.Nc3=) 6...ab4 7.d4 ba3 8.Na3 Bc6 9.Bd3 Bb4 10.c3 Be7 11.Ne2=; C3) 5...c6 6.Nh3 (6.c4 bc4 7.Bc4 d5 8.ed5 cd5 9.Bb5 Nbd7 10.Bd4 Bd6 11.Ne2+=) 6...a5 7.ba5 Ra5 8.c4 bc4 9.Bc4 d5 10.Bd3 de4 11.Be4+=; D) 5.e5 Nd5 6.Nf3 (6.Nc3 a6 7.Nf3 c5 8.bc5 Bc5 9.Ne4 Be7 10.Bd4 0–0 11.c4=) 6...a6 7.d3 a5 8.c4 Nf4 9.Bc1 Ng6 10.cb5 ab4 11.a4=.

3.a3 f6

4.e3 a6 5.Nf3 e5 6.Bd3 (better is 6.Be2+=) 6...e4–/+ 7.Be4 (7.Nh4!? ed3 8.Qh5 g6 9.Ng6 hg6 10.Qh8 dc2 11.Qg8 cb1B 12.Rb1=) 7...Be4–+ 8.Nc3 Bc6 9.0–0 d5 10.d4 (10.Nd4 Qd7–/+) 10...Ne7 11.Re1 Ng6 12.Qd3 Bd6 13.e4 de4 14.Ne4 Kf7 (14...0–0 15.Qb3 Kh8 16.c4–+) 15.c3 (15.Qb3 Kf8–+) 15...Nf4–+ 16.Qe3 (16.Qd2–+) 16...Re8 17.Rad1 (17.Nd6 Qd6 18.Qd2–+) 17...Re4 18.Qc1 (18.Qd2 Qd7 19.Re4 Be4 20.Ne5 fe5 21.de5 Be5 22.Qd7 Nd7 23.Rd7 Ke6–+) 18...Ne2 (better is 18...Qd7 19.Nh4 Nh3 20.Kf1 Rh4 21.f3–+) 19.Re2 Re2 20.Nh4 (20.d5 Bd7–+) 20...Qd7 21.d5 (21.Re1 Bf4 22.Qa1 Re1 23.Qe1 g5–+) 21...Bb7 22.c4 Re4 23.Nf3 Rc4 24.Qd2 Bf4 25.Qe2 Bd5 26.g3 Re4 27.Qc2 Bh6 28.Kg2 Qe6 29.Qc7 Qe7 30.Qb6 Qb7 31.Qc5 Rc4 32.Qd6 Be6 33.h3 Rc6 34.Qd8 Rc8 35.Qd4 Nc6 36.Qd6 Rd8 37.Qc5 Rd1 38.h4 Qd7 39.Qh5 Kf8 40.Bf6 Bf7 41.Qc5 Qd6 42.Qb6 Qf6 43.Qc7 Bd5 44.h5 Qf3 45.Kh3 Be6 46.Kh2 Qh1 0–1. pieeater – gordiemac, ChessWorld.net, 2012.

4.e4 e5 5.Nf3 g5 (5...a6 6.Nc3+=) 6.Ng1 (6.d4!? Be4 7.de5+/–) 6...Be4= 7.Qh5 (better is 7.Nc3!? Bg6 8.Bb5=) 7...Bg6–/+ 8.Qg4 (8.Qe2 Nc6–/+ (worse is 8...Bc2 9.d4 Bb1 10.Rb1+=)) 8...h5 (8...c6 9.Qe2–/+) 9.Qf3 Bc2?? (better is 9...c6–/+) 10.Qa8+– c6 (10...a6 11.d4 ed4 12.Nf3+–) 11.Qa7 d5 12.Nf3 Bd6 13.d3 d4 14.Be2 Ne7 15.0–0 0–0 16.Nbd2 Nc8 17.Qb7 Nb6?? 18.Rfc1 Ba4 19.Bd1 g4?? 20.Nh4?? Rf7= 21.Qf7 Kf7 22.Nf5 Nd5 23.Nh6?? Kg6–+ 24.Ne4 Kh6 25.g3 f5 26.Nd2 Nd7 27.Ba4 ba4 28.Nc4 Be7 29.Nd2 Bg5 30.Rd1 N7b6 31.Kg2 Qc7 32.h3 gh3 33.Kh3 Bd2 34.Rd2 f4 35.gf4 Nf4 36.Kg3 Qg7 37.Kf3 Qg2 0–1. pieeater – Jaime532133, ChessWorld.net, 2010.

3.a3 Nf6

4.e3 a5 5.Nf3= (5.Bb5?? Bg2 6.Be2 Bh1–+).

4.e3 Nc6 5.Nf3 Ne4? (5...a6 6.c4 bc4 7.Bc4+=) 6.Bd3 (6.Bb5 e6+/–) 6...f5? (6...Nd6 7.0–0+=) 7.Nd4 (better is 7.Nh4!? Nd6 8.Nf5 Nf5 9.Bf5+–) 7...Nd4+/– 8.Bd4 Rg8? (better is 8...e6!? 9.Qh5 g6+/–) 9.Qh5+– g6 10.Qh7 Bd5 11.Nc3 (11.Be4 fe4 12.Nc3 Bc4 13.Ne4 c6+–) 11...Nc3 (better is 11...Ng5!? 12.Qh4 Bg2 13.Qg5 Bh1 14.Bf5 Kf7+/–) 12.Bc3+– e6?? (12...c6 13.g4!+–) 13.0–0 (better is 13.Qg8 Qg5 14.Bg7+–) 13...e5 14.Be5 Bd6? 15.Bd6 cd6 16.Bb5 Bg2 17.Kg2 Qg5 18.Kh1 0–0–0 19.a4 Rh8 20.Qf7?? Qh5 21.Ba6 Kb8 (21...Kb8 22.Qh7 Rh7 23.h3 Qh3 24.Kg1 Qh2) 0–1. pieeater – chess blues, ChessWorld.net, 2010.

4.e3 d5 5.Nf3 (5.Bb5 c6 6.Be2 e6+/–) 5...Nbd7 (5...c6 6.a4 e6 7.Bc3=) 6.Be2 (6.Bb5 c6 7.Be2 e6+/–) 6...d4? (better is 6...a6!?=) 7.Bd4 e6 (7...Bf3 8.Bf3 e5 9.Bc3+/–) 8.0–0 (8.Bb5 a5 9.ba5 Ra5+–) 8...Ne4? (8...a6 9.c4 bc4 10.Bc4+/–) 9.d3 (better is 9.Bb5!? f6 10.Bb2+–) 9...Nef6+/– 10.e4 e5 (10...a5 11.Nc3+–) 11.Bb2 (11.Ne5!? Ne5 12.Be5 a5+–) 11...Qe7 12.Nc3 Qe6? (better is 12...a6!?+/–) 13.Nb5+– h6 1–0. pieeater – taraspet, ChessWorld.net, 2012.

4.e3 e6 5.d4 d5 (5...c6 6.Nf3=) 6.Nd2 (6.Bb5 c6 7.Bd3 a5+=) 6...Bd6 (better 6...a5=) 7.c4?? (better 7.Bb5 c6 8.Bd3+–) 7...bc4 (7...dc4 8.Qc2–/+) 8.b5 (8.Qf3 c6–/+) 8...Nbd7 9.a4 (9.e4 Ne4 10.Ne4 de4 11.Bc4 c6 12.bc6 Bc6–+) 9...a6 10.Qc2 ab5 11.ab5 Ra1 12.Ba1 0–0 13.Nc4? (better 13.Ngf3–+) 13...dc4 14.Qc4 (14.Bb2 Nb6–+) 14...Bd5 (better 14...Qa8 15.f3 Qa1 16.Kf2–+) 15.Qa4 (15.Qc1 Ne4 16.Nh3 c6–+) 15...Qe7 16.b6 (16.Qc2 Bb4 17.Kd1–+) 16...Nb6 (better 16...Ra8!? 17.bc7 Bc7 18.Ba6 Bg2 19.Bc3 Bh1 20.Qc4–+) 17.Qc6 (17.Qc2 Bb4 18.Bc3–+) 17…Bc6 (17...Bc6 18.Nh3 Ra8–+) 0–1. pat_cash87 – Xenusoida, lichess.org, 2020.

4.e3 e6 5.Nf3 (--> 1.b4 Nf6 2.Bb2 b5 3.e3 Bb7 4.Nf3 e6 5.a3).

4.Nf3 a5 5.e3=.

4.Nf3 Nh5 5.e4 (5.e3 a6+/–) 5...Be4 (5...a6+=) 6.Be2 (6.Nc3 Bb7 7.Bb5 a5 8.ba5 Nf4+=) 6...e6 (6...Nf4 7.Nc3 Bg6 8.0–0+=) 7.0–0 (7.Nc3 Bb7 8.Nb5 a5+=) 7...Nc6 (7...c6 8.Re1 Nf6 9.Nc3+=) 8.d3 (better is 8.Bb5!? a5 9.d3+/–) 8...Bg6 9.Nbd2 (9.Nc3 a5=) 9...a5 10.Ne5 (10.Nd4 Nd4 11.Bd4 Nf4+=) 10...Ne5 11.Bh5 Bh5 (11...Qh4 12.Bg6 Ng6 13.c4+=) 12.Qh5 Ng6 13.Rfe1 (better is 13.ba5 d5 14.Nb3+=) 13...a4 (13...ab4 14.ab4 Bb4 15.c3 Ra1 16.Ra1+=) 14.d4 (14.Qb5 c5+=) 14...Bd6 (14...d5 15.Nf3–/+) 15.c4 (15.Qb5 0–0+=) 15...Nf4 (15...Bf4 16.Rad1 bc4 17.d5 Bd2 18.Rd2+=) 16.Qg4 (16.Qf3 c6 17.Ne4+=) 16...Qf6 (16...Nd3 17.Reb1 0–0 18.c5 Nb2 19.cd6+=) 17.Rab1 (better is 17.Ne4 Qh6 18.Nd6 cd6 19.Bc1+=) 17...Nd3–/+ 18.Re2 Nb2 (18...Qf4 19.Qf4 Nf4 20.Re4–/+) 19.Rb2 0–0 20.Ne4? (better is 20.Rc2–/+) 20...Qf5?? (better is 20...Qd4 21.Red2 Qe5–+) 21.Qf5+/– ef5 22.Ng5?? bc4–/+ 23.Rbc2 h6 24.Nf3+= c6 25.Rc4 f4 26.h3 Rae8 27.Kh2?? Re2–+ 28.Kg1 Ra2 29.Rc3 Re8 30.Nh4 Ree2 31.Nf5 Bc7 32.d5 f3 33.gf3 Rf2 34.Ne7 Kf8 35.Nc8 Bh2 36.Kh1 Ra1 37.Rc1 Rc1 0–1. pieeater – glo1, ChessWorld.net, 2009.

3.a4 ba4

4.Ra4 e6 5.Ra1 Be7?? 6.Bg7+– Nf6 (6...Bf6 7.Bh8 Bh8+–) 7.Bh8 d6 (7...Bb4 8.Nf3+–) 8.e3 Qd7 (8...a6 9.Nf3+–) 9.Bf6 (9.Nc3 a6+–) 9...Bf6 10.Ra3 (10.c3 e5+–) 10...Qc6 (10...Nc6 11.c3+–) 11.Qh5 (better 11.c3+–) 11...Na6 (11...Qc2 12.Qd1 Qd1 13.Kd1 c5 14.bc5 dc5+–) 12.Bb5 Qb5 (12...Nb4 13.Bc6 Bc6+–) 13.Qb5 c6 14.Qb7 (14.Ra6?! cb5 15.Rd6 Bg2+=) 14...Rb8 15.Qa6 Rb4 16.Qc6 (16.Qc8 Bd8 17.Ra7 Rf4 18.Qd7 Kf8 19.Qd8 Kg7 20.Qg5 Kf8 21.Ra8) 16...Kd8 17.Qd6 (17.Ra7 Rb1 18.Ke2 Re1 19.Ke1 d5 20.Qd7) 17...Kc8 (17...Ke8 18.Ra7 Rb1 19.Ke2 Re1 20.Ke1 h6 21.Qd7 Kf8 22.Qf7) 18.Qb4 (18.Ra7 Rb1 19.Ke2 Re1 20.Ke1 Bd8 21.Qc6 Bc7 22.Qc7) 18...Kd7 (18...Bb2 19.Ra7 Bg7 20.Qb7 Kd8 21.Qd7) 19.Ra7 Kc6 20.Qd6! (20.Qd6 Kd6 21.Rf7+–) 1–0. FeegLood (2720) – macho2001, lichess.org, time forfeit, 2015.

4.Ra4 e6 5.e3 (5.Nc3 c5=) 5...Nf6 6.Nf3 Nc6 (6...Nd5 7.c3=) 7.c3 (7.b5 Nb4+=) 7...Be7 (7...a5 8.b5 Nb8 9.Be2=) 8.Ba6 Rb8 (8...Ba6 9.Ra6 Nb8 10.Ra4=) 9.0–0 Ba6 10.Ra6 0–0 (10...Qc8 11.Qe2+=) 11.d3 (11.Qa4 Rb6=) 11...Qc8 12.Ra1 (12.Ra2 a5 13.ba5 Na5=) 12...Qb7 (12...a5 13.Nbd2=+) 13.Nbd2 (13.Ba3 Qb5=) 13...d5 (13...a5 14.Qe2=+) 14.d4 (14.Qa4 e5=) 14...Bd6 (14...a5!?–/+) 15.Qa4 Ra8 (15...Qb6 16.Rfb1=) 16.Ba3 (16.b5 Rfb8 17.c4 dc4 18.bc6 Qb2+=) 16...Ne7 (16...Rfb8 17.Rfb1=) 17.c4 (17.b5 Rfb8 18.Rfb1 Nf5+=) 17...dc4= 18.Nc4 Nf5 (18...a6 19.Rfc1=) 19.Nd6 (19.b5 Rfb8 20.Rfb1 a6=) 19...cd6 20.b5 (20.Rfc1 Rfb8=) 20...Rfb8 21.Rfb1 a6 (21...Ne4 22.Qc2=) 22.b6 d5 23.Ne5 Rc8 24.Bc5 Ne4 25.Qd7 Qd7 26.Nd7+– Nc3 27.b7 Nb1 28.bc8Q Rc8 29.Rb1 h6 30.Rb6 a5 31.Ra6 g5 32.Ra5 Nd6 33.g3 Nc4 34.Ra7 Nd2 35.Ne5 h5 36.Rf7 g4 37.Re7 Rb8 (38.Re6 Rb2+–; 37...Ne4 38.h3 gh3 39.Nd3+–). wood – revbodio, Live Game Caissa's Web, 2005.

4.Ra4 Nf6=.

4.b5 a6 5.c4=.

4.b5 Nf6 5.e3 (5.Nc3 a6 6.Ra4 c6 7.bc6 Nc6=) 5...e6 (5...a6 6.Nf3=) 6.Nf3 Be7 7.c4 (7.Nc3 a6 8.Ra4 c6=) 7...0–0 8.Be2 (8.Nc3 d5=) 8...d5 (8...a6 9.0–0=) 9.Ra4 Nbd7 10.cd5 Bd5 (10...ed5!? 11.Ra2 Nb6+=) 11.Nc3+= Nb6 12.Nd5 (12.Rd4 Bc5 13.Rh4 Bb7+–) 12...Nfd5 (12...Qd5 13.Rd4 Qa2 14.Qc1+=) 13.Ra1 (13.Rg4 Bf6 14.Ne5 Qd6+–) 13...Bd6 (13...Bf6 14.d4+–) 14.0–0 Qd7 15.Nd4 f5 (15...g6 16.Qb3+–) 16.f4 (16.Qb3 e5 17.Nc6 e4+–) 16...Nf6 (16...e5 17.fe5 Be5 18.Bd3+–) 17.Qb3+– Kh8? (better 17...Nfd5+–) 18.Qe6 Qe6 19.Ne6 Rfe8 (19...Rf7 20.Rfc1+–) 20.Nd4 1–0. Anonymous – Anonymous, lichess.org, 2020.

4.c4 a5 5.Ra4 ab4 6.d4 (6.Rb4 Bc6 7.Nc3 Na6=+) 6...Ra4 7.Qa4 e6 8.Nf3 c5 9.dc5 Na6 (9...Bc5? 10.Qb5 Bf3 11.Qc5+–) 10.Qb5 Nc5 11.Nbd2?? (better is 11.Bg7 Bc6 12.Bh8 Bb5 13.cb5–/+) 11...f6 (11...Bc6!? 12.Qc5 Bc5 13.Bg7–+) 12.e3 (12.Nd4 Ba6 13.Ne6 Bb5 14.Nd8–+) 12...Bc6 (13.Qb4 Nd3 14.Bd3 Bb4–+) 0–1. Daveygravey – marekt, ChessWorld.net, 2003.

4.c4 e6 5.e3 (5.Ra4 Nc6 6.b5 Nce7+=) 5...Nf6 (5...Bb4? 6.Bg7 Qg5 7.Bh8 Bg2 8.Nf3+–) 6.b5 (6.Ra4 c5 7.b5 a6=) 6...a6=+ 7.Ra4 ab5 8.Ra8 Ba8 9.cb5 c6 (9...Be7 10.Nc3=+) 10.Nf3 cb5 (10...Be7 11.Bf6 Bf6 12.Qa4=+) 11.Bb5 Be7 12.0–0 0–0 (12...Qb6 13.Nc3=) 13.d4 (13.Qe2 Bc6=) 13...d5 (13...Qb6 14.Ba3 Ba3 15.Na3=) 14.Qa4 (better is 14.Ba3=) 14...Bd6?? (better is 14...Qb6=) 15.Qa8+– Qb6 16.Qa4 Ne4 (16...Rc8 17.Nc3+–) 17.Nc3 Nf6 18.Rb1 Rc8 19.Qa3 (better is 19.Bd3+–) 19...Ba3–+ (20.Bd3 Bb2–+) 0–1. bby – revbodio8, Live Game Caissa's Web, 2004.

4.e3 Bc6 5.b5+= Bd5 (5...Bb7 6.Nf3+=) 6.c4 (6.Nc3 Bb7+=) 6...Be4 (6...Bb7 7.Ra4 a6 8.Nf3+=) 7.Ra4 (7.Nc3 a3 8.Ba3 Bb7+=) 7...h5 (7...a6!?+=) 8.Nc3+/– Bb7 9.c5 (9.Qa1 a6+/–) 9...h4 (9...e5 10.Nf3+/–) 10.Nf3 (10.Qa1 h3 11.Ne4 Rh4+/–) 10...h3+= 11.c6 (11.d4 a6+/–) 11...dc6= 12.Rd4 (12.Ne5 c5 13.Rg1 Nd7 14.Nd7 Qd7 15.gh3 c6+=) 12...Nd7 (12...Qc8!?=) 13.Ne5+= cb5?? (better is 13...Ne5 14.Rd8 Rd8+=) 14.Rd7+– (14.Nd7?! hg2 15.Bg2 Bg2+/–) 14...Qb8 (14...Qd7 15.Nd7 hg2 16.Bg2 Bg2+–) 15.Qb3 hg2 (15...e6 16.Bb5 c6 17.Rb7 Qb7 18.Bc6 Qc6 19.Nc6 hg2+–) 16.Qf7 1–0. Wall,Bill – Jordam, Internet, 2002.

4.e3 e6 5.Ra4 Bc6 (5...Nf6 6.Nf3=) 6.b5+= Bb7 7.Nf3 c6 (7...a6 8.Bd3+=) 8.c4 (8.Nc3 Nf6+=) 8...cb5 9.cb5 Bc5?? (better 9...Nf6+=) 10.Bg7+– Qc7 (10...a6 11.Bh8 ab5 12.Ra8 Ba8 13.Bb5+–) 11.Bh8 Qd6 (11...a5 12.Nc3+–) 12.Ng5 h6 (12...Qe7 13.Nh7 Kd8 14.Qg4+–) 13.Nf7! Kf7 14.Qh5 Kf8 (14...Ke7 15.Rg4 Nf6 16.Bf6 Kf6 17.Qh6 Kf7 18.Qh7 Ke8 19.Rg8 Qf8 20.Qg6 Ke7 21.Rf8 Kf8 22.Qf6 Ke8 23.Bd3+–) 15.Be5 Qe7 16.Rf4 Qf7 17.Qf7 1–0. DEFFM – GuestKSTC, freechess.org, 2018.

4.e3 Nf6 5.Ra4 e6 6.Nf3=.

4.Nf3 a5 5.Ra4 ab4 6.Rb4 Bc6=.

4.Nf3 d6 5.Ra4+= Bf3 (5...e5 6.e3+=) 6.ef3 e5 (6...e6 7.Nc3+=) 7.d4+– ed4 8.Qd4 Nc6 (better 8...d5+–) 9.Bb5+– Nge7 10.Ra6 Qd7 11.Rc6! Nc6 (11...Rc8 12.Qc4 Kd8+–) 12.Qd5 Qe7 (12...Kd8 13.Bc6 Qe6 14.Qe6 fe6 15.Ba8 Be7+–) 13.Kd2 0–0–0 (13...Kd8 14.Qc6 Rb8 15.Re1 Qe1 16.Ke1 Rb5 17.Qb5+–) 14.Qc6 Qg5 15.Ke2 Qe7 (15...Qb5 16.Qb5 Rd7+–) 16.Kd3 Kb8 (16...Qe2 17.Ke2 Re8 18.Qe8 Kb7 19.Ba6 Ka6 20.Qc6) 17.Ba6 (17.Ba6 Qe3 18.fe3 d5 19.Qb7) 1–0. pcmvr – jaortiz (2385), net–chess.com, 2014.

4.Nf3 Nf6 5.Ra4 Bc6 6.Ra5=.

3.a4 a5

4.ab5 a4 5.c3 e5 6.c4 (6.Ra4 Ra4 7.Qa4 Ne7+–) 6...c5 (6...Qf6!?+–) 7.bc5 Bc5 8.e3 (better 8.Be5 Nf6 9.e3+–) 8...Qh4? (better 8...Qf6!?+–) 9.Nf3 (9.Be5!? Qg5 10.Bb8 Rb8+–) 9...Qe7 10.d4 (better 10.Be5!? Bf3 11.Qf3 Qe5 12.Qa8 Qa1 13.Qb8 Ke7 14.Bd3+–) 10...a3+– 11.Bc3 a2? (11...ed4!? 12.Bd4 Bb4 13.Nbd2 Nf6+–) 12.Nbd2 (12.dc5!? ab1B 13.Rb1 f6+–) 12...Bb4 (12...ed4 13.Nd4 Nh6 14.Qc2+–) 13.Bb4 Qb4 14.Qb3 (14.Ne5 Nf6+–) 14...Qa5? (14...Qb3 15.Nb3 Bf3 16.gf3 ed4 17.Nc1+–) 15.c5 (better 15.Ne5 d6 16.Nd3 Nf6+–) 15...Nf6? (15...Bf3 16.gf3 ed4 17.ed4 d6+–) 16.Ne5 Bd5 (16...d5 17.Nd3+–) 17.Nec4 (17.Bc4 Be6 18.d5 Qc7 19.de6 Qe5 20.Ra2 Ra2 21.ef7 Ke7 22.Qa2 Qc5+–) 17...Qa7 (17...Qa4 18.Qa4 Ra4 19.e4+–) 18.Nd6 Ke7 19.N2c4 (better 19.Bc4 Be6+–) 19...Bc4 (19...Qa4 20.Qa4 Ra4 21.Nb6+–) 20.Qc4 (better 20.Bc4!? Rf8+–) 20...Qa5 (20...Rf8 21.Qc1 Qa4 22.Bc4 Qb4 23.Qd2 Qb1 A) 24.Rb1?? ab1Q (24...ab1R 25.Ke2 Rh1 26.Nf5 Kd8 27.Qb4+–) 25.Qd1 Qd1 26.Kd1 Ra1 27.Ke2 Rh1–+; B) 24.Ke2+–) 21.Ke2 (better 21.Kd1 Qa4 22.Qa4 Ra4 23.Kc2+–) 21...Ne4 (21...Rf8+–) 22.d5 White intends c6 (better 22.Qf7 Kd8 23.Nb7 Kc8 24.Na5 Ra5 25.Kd3 Nf2 26.Qf2 Rb5 27.Ra2+–) 22...Nc3?? (22...Qd2 23.Kf3 Qf2 24.Ke4 Ra4 25.Nf5 Kf6 26.Qa4 Qf5 27.Kd4 Qe5 28.Kd3 Qa1 29.Qf4 Kg6 30.Qg3 Kh6 31.Qh4 Kg6 32.Qh5 Kf6 33.Qh4 Kg6 34.Qg4 Kf6–/+) 23.Kf3 (better 23.Kd3 Na4 24.Qe4 Kd8 25.Nf7 Kc8 26.Nd6 (26.Nh8?? Nc5 27.Kd4 Qb4 28.Bc4 Ne4 29.Ke4 Qc4 30.Kf3 Qd5 31.Kg3 Qe5 32.Kf3 g6–+) 26...Kd8 27.Qd4 Nc5 28.Qc5 Qa3 29.Qa3 Ra3 30.Kd4+–) 23...Kd8 (23...Qa3 24.Nf5 Kd8+–) 24.Qh4 (better 24.Nb7 Kc8 25.Na5 Ra5 26.Qc3 Ra4 27.Qg7 Rd8+–) 24...f6 25.c6 (25.Nb7 Ke7 26.d6 Ke8 27.Na5 Ra5+–) 25...Re8 (25...Ke7 26.Nb7 Qa4 27.d6 Kf7 28.Qc4 Qc4 29.Bc4 Kg6 30.c7+–) 26.c7! Kc7 (26...Qc7 27.Nf7 Double attack (27.Ne8 Decoy; 27.Ne8 Zwischenzug); 26...Kc7 27.Ne8 Double attack (27.Ne8 Zwischenzug)) 27.Ne8 Kb7 (27...Kd8 28.Ng7 Nd5+–) 28.Qe4 (better 28.Qc4 Ra7 29.b6 Ra6 30.Nd6 Kb6 31.Qb3 Kc7 32.Ne8 Kd8 33.Qb8 Ke7 34.d6 Kf7 35.Bc4 Kg6+–) 28...Nd1 (better 28...Ne4 29.Ke4 Qc3 30.Nd6 Kc7–+) 29.d6+– Kb6 30.Qd4 Kb7 31.Qd1 1–0. Agiant (1620) – J04N_2 (1635), lichess.org, 2021.

4.ab5 ab4

5.Ra8 Ba8 6.c3 c6 7.Qa4+= Bb7 (7...bc3 8.Nc3 Bb7 9.e4+=) 8.cb4+– cb5 (8...e6 9.bc6 Nc6 10.b5+–) 9.Qb5 Nc6?? (better 9...Qc7+–) 10.Qb7+– d5 (10...e6+–) 11.e3 Qd7 (11...Na7 12.Qa7 f6 13.Nc3+–) 12.Qa8 Qd8 13.Qc6 Qd7 14.Qa8 Qd8 15.Bb5 1–0. Pierre – Sears, internet, 2020.

5.Ra8 Ba8 6.c3 e6 7.Qa4 Bd5 (7...Be4!? 8.d3 Bb7+=) 8.cb4+/– Nf6 9.Nc3 Bb7 10.e3 Be7 11.Nf3 0–0 12.Be2 Ne4 (12...Bd6 13.0–0+=) 13.0–0 Bf6 14.Ne4 Be4 (14...Bb2 15.Qc2 Be4 16.Qe4+–) 15.Bf6 Qf6 16.Rc1 (16.d4 Rc8+–) 16...Rc8 (16...Bf3 17.Bf3 Qb2 18.Rd1+–) 17.Qa7 Qd8 18.Ne5 (18.d4 d6+–) 18...f6 19.f3 fe5 20.fe4 d6 (20...c6 21.Qa1+–) 21.b6! c6 (21...cb6 22.Rc8 Decoy) 22.Bg4 Qe8 23.Qa2 (better 23.b5 c5 24.Qa2+–) 23...Kf7?? (better 23...d5+–) 24.Rf1 Ke7 (24...Kg6 25.Be6 Kh6 26.Bc8 Qc8+–) 25.Qe6 (25.Qe6 Kd8 26.Qd6 Nd7 27.Rf8 Rc7 28.bc7 Kc8 29.Qc6 Qf8 30.Bd7) 1–0. pcmvr – grahamtrue (2250), net–chess.com, 2014.

5.Ra8 Ba8 6.e3=.

5.Ra8 Ba8 6.f3=.

5.Ra8 Ba8 6.Nf3 Nf6 7.e3 e6 8.Be2 Bd6 (8...Be7=) 9.g4 (9.0–0 0–0=) 9...h6 (9...0–0 10.g5 Ne4 11.h4=+) 10.Rg1 Qe7 11.h4 (11.Bc4 Bc5=) 11...Rg8 (11...e5 12.d3=) 12.g5+= hg5 13.hg5 Nd5 14.g6 fg6 15.Nd4 (15.Bd3 Kd8+=) 15...Be5 (15...e5!? 16.Nf3 e4=+) 16.Rg6+= Bf6 17.Bh5 Kd8 18.Rg1 (18.c4 bc3 19.dc3 Qc5=) 18...Nb6 (18...Rf8 19.Qg4=) 19.Bf3 c6 (19...e5 20.Ba8 ed4 21.Qf3–/+) 20.bc6 (20.Qe2 Rf8 21.Qd3 Qf7 22.bc6 Bc6 23.Nc6 Nc6 24.Bc6 Bb2+=) 20...Nc6= 21.Nc6 Bc6 22.Bf6 Qf6 23.Bc6 dc6 24.c3 (24.d4=) 24...Kc7 (24...Rf8!? 25.Rf1 c5=) 25.cb4+– Rd8 (25...Nd5!?+–) 26.Nc3+– Nd5 (26...Ra8 27.d4+–) 27.Ne4 (27.Qa4 Rd7 28.Qa7 Kc8 29.Qa8 Kc7+–) 27...Qe5 (better 27...Qb2+–) 28.Nc5+– Nb4 29.Rg7! Kb6 (29...Qg7 30.Ne6 Double attack (30.Ne6 Decoy)) 30.Na4?? (better 30.Nd7 Rd7 31.Rd7+–) 30...Kb5?? (30...Ka6 31.Rg4 Nd3 32.Ke2 Qh5=+) 31.Rb7+– Ka6 (31...Ka5 32.Nc5!! Nd3 33.Nd3 Rd3+–) 32.Rb4 Rd3 (32...Ka5 33.Nc3 Qb5 34.Nb5 Kb4+–) 33.Nc5! Ka5 (33...Qc5 34.Qa4 Mate attack) 34.Nd3 (34.Qa4) 34...Qd5 (34...Qb5 35.Qa1 Kb6 36.Qe5 Kb7 37.Nc5 Kc8 38.Rb5 cb5 39.Qd6 b4 40.Qc6 Kd8 41.Qd7) 35.Qa1 (35.Qa1 Qa2 36.Qa2; 35.Qa4) 1–0. FeegLood (2660) – CaissaSoeze (2270), lichess.org, 2015.

5.e3 Ra1!? 6.Ba1 Nf6=.

5.e3 e5 6.Be5+/– f6 (6...Ra1 7.Ba1 b3 8.c4+/–) 7.Bb2 (7.Ra8 Ba8 8.Bd4 Be4+/–) 7...c5 (7...Ra1 8.Ba1 Be4 9.Bd4+/–) 8.Qh5 (better is 8.Ra8 Ba8 9.Nf3+/–) 8...Ke7? (8...g6 9.Qd1+/–) 9.Nf3 (9.Ra8 Ba8 10.Qc5 Ke8 11.Qh5 g6+–) 9...g6 (better is 9...Ra1 10.Ba1 d5+/–) 10.Qg4?? (better is 10.Qc5 Ke8 11.Qd4+–) 10...f5?? (10...Ra1 11.Ba1 Nh6 12.Bf6 Kf7 13.Qc4 d5 14.Bd8 dc4 15.Bc4 Kg7+–) 11.Qg5+–. wood – justinv, Live Game Caissa's Web, 2005.

3.a4 a6

4.ab5 a5?? 5.ba5+– c6 (5...Bc8 6.Nf3+–) 6.a6 Na6 7.ba6 (7.Ra6?! Ba6 8.ba6 Qb6+–) 7...Ra6 (7...Ba6 8.Nf3+–) 8.Ra6 (8.Na3 Nf6+–) 8...Ba6 9.Nf3 Qb6 (9...e6 10.Nc3+–) 10.Ba3 (10.Bc3 Nf6+–) 10...e6 (10...Nf6 11.d3+–) 11.Bf8 Kf8 12.e3 (12.Nc3 Nf6+–) 12...Bf1 13.Kf1 Qb5 (13...Nf6 14.Kg1+–) 14.d3 h5 (14...Nf6 15.c4 Qh5 16.e4+–) 15.Nbd2 f6 (15...h4 16.Qa1 h3 17.gh3+–) 16.Qa1 (16.c4 Qa5+–) 16...Kf7 (16...h4 17.Ne4 Qb8 18.Ke2+–) 17.Qa7 Ne7 18.Qd7 Ra8 19.Ke2 Ra2 (19...Qd5 20.Qc7+–) 20.Rb1 Rb2 (20...Qd5 21.Qc7 Qa5 22.Qa5 Ra5+–) 21.Nd4 Qb4 (21...Rb1 22.Nb5 Rb5 23.Ne4+–) 22.Qe6 Ke8 23.Ra1 Qb8 24.Nc6 Qb5 25.Qe7 1–0. DEFFM – rigarus, freechess.org, 2018.

4.e3 e5 5.Be5 Nc6 6.Bb2 (6.Nf3 Ne5 7.Ne5 Nf6+=) 6...Nf6 (6...Nb4!? 7.ab5 ab5 8.Ra8 Qa8=) 7.ab5+– ab5 8.Bb5 (8.Ra8 Ba8 9.Nf3 Bb4 10.Bb5 0–0+–) 8...Bb4 (8...Ra1 9.Ba1 Nb4 10.f3+=) 9.Na3 (9.Ra8!? Ba8 10.Nf3+–) 9...0–0 (9...Qe7 10.Qc1=) 10.Nf3+= Re8 11.0–0 Qe7 12.Qc1 Ra5 13.Be2 Rea8 14.Nc4 (14.Nb5 d6+–) 14...Ra1+= 15.Ba1 d5 (15...Ba6 16.Nd4+=) 16.Nce5 Ne5 17.Be5 h6 (17...Bd6 18.Qb2 Be5 19.Qb7+–) 18.Bb2 (18.Qb2 c5+–) 18...Ba3 (18...Ne4 19.c3 Bd6 20.d3+–) 19.Ba3 Qa3 20.Qb1 (20.Qa3 Ra3 21.Rb1 Ba6+–) 20...Ba6 21.Ba6 Qa6 22.d3 c5 23.Qb2 c4 24.dc4 Qc4 25.Nd4 Ne4 26.g3 Ra2 27.Qb8 Kh7 28.Qf8 Ng5 29.h4 Ne6 30.Qf7 Nd4 31.ed4 Ra8 (31...Qd4!? 32.Re1 Ra7+–) 32.Qf5 Kh8 33.Rd1 Kg8 34.Qd3 1–0. jaddwarrior (2105) – OrangAttackMan (1945), ChessWorld.net, 2016.

4.Nf3 e6 (4...Nc6 5.c3 ba4 6.d4+=) 5.g3 (5.ab5 ab5 6.Ra8 Ba8+=) 5...Nf6 6.Bg2 (6.ab5!? ab5 7.Ra8 Ba8 8.Na3=) 6...Bb4=+ 7.0–0 0–0 8.d3 (8.Na3 ba4 9.c3 Be7=) 8...d6 (8...Nc6 9.Na3 Ba3 10.Ra3=+) 9.e4 (9.ab5!? ab5 10.Ra8 Ba8 11.c3=+) 9...Nbd7–/+ 10.Nbd2 c5 11.c3 Ba5 12.ab5 ab5 13.Nb3 (13.Qe2 Qc7–/+) 13...Bb6 14.Qc2 (14.Qe2 Qe7–/+) 14...Qc7 Black plans c4 15.Rae1 (15.Nbd2 h6–/+) 15...Ra2 (better 15...c4 16.Nbd2 cd3 17.Qd3 Nc5–+) 16.h3? (better 16.Nc1 Ra6 17.c4–+) 16...c4 17.Nc1 (17.dc4 bc4 18.Nc1 Be4 19.Re4 Rb2 20.Qb2 Ne4–+) 17...Ra7 (17...cd3 18.Qb3 Ra5 19.Nd3 Ne4 20.Kh2–+) 18.Nh2 (18.Nd2 e5–+) 18...d5 (18...cd3 19.Nd3 Ra4 20.Nc1–+) 19.ed5 Bd5 20.Nf3 (20.d4–+) 20...Bf3 21.Bf3 Qg3 22.Bg2 Nh5 (22...Qf4 23.Ne2 Qf5 24.Nd4 Bd4 25.cd4 cd3 26.Qb3–+) 23.Kh1 (23.d4 Qd6 24.Ne2 Bc7–+) 23...Qg5 (23...Qd6 24.Kg1–+) 24.dc4 (24.Ne2 Qf5 25.Ng3 Ng3 26.fg3 Qd3 (26...cd3?! 27.Rf5 dc2 28.Rb5–+) 27.Qd3 cd3–+) 24...bc4 (24...Nf4 25.Qe4 bc4 26.Ne2–+) 25.Re4 (25.Ne2–+) 25...Nf4 26.Rg1 (26.Rf4 Qf4 27.Ne2 Qf6–+) 26...Rc8 (better 26...Qf5 27.Re2 Qh5 28.Re3 Be3 29.fe3 Nh3 30.Bh3 Qh3 31.Qh2 Qe3 32.Rg3 Qe4 33.Qg2–+) 27.Bf3 (27.Qd2 e5 28.Ne2 Nh3 29.Qg5 Ng5–+) 27...Qf5 28.Bg4 Qf6 (better 28...Qd5 29.Bf3 Ne5 30.Rf4 Nf3 31.Rd1 Nd2 32.Kg1–+) 29.Qd2 (29.Rge1 h5 30.Qd2 Bc7–+) 29...Nd5 (better 29...Nh3 30.Bh3 Qf3 31.Rg2 Qe4 32.Bg4–+) 30.Kg2 (30.Rge1 Rc6–+ (worse 30...Bf2 31.Rf1 Be3 32.Qe2–+)) 30...Ne5 31.Rf1 Ng4 32.Rg4 g6 (better 32...h5 33.Rg3 Bc7–+) 33.f4 (33.Ne2 Ra2 34.Nc1–+) 33...Qf5 (better 33...Ne3 34.Kh1 Nf1 35.Qd6–+) 34.Kg3 (34.Rg3 Rd8 35.Kh2 e5–+) 34...Rd8 (34...Be3 35.Qg2 Rb8 36.Kh2 Nf4 37.Kh1–+) 35.Qe2 (35.Rg5 Qf6 36.Qe1 Bc7 37.Rd5 Rd5–+) 35...Ne7 (better 35...Bc7 36.h4 h5–+) 36.Qc4 (36.Rg5 Qf6 37.Rb5 Nf5 38.Kh2–+) 36...Rd2 37.Rg5 Qf6 (37...Qc2 38.Qb5 Nf5 39.Rf5 Rg2 (39...Qf5?! 40.Qb6 Rad7 41.c4–+) 40.Kf3 ef5 41.Qe5 Rh2 42.Qe8 Kg7 43.Qe5 Kh6 44.Qe2 Re7 45.Kg3 Ree2 46.Ne2 Qe2 47.Rf3 Rg2 48.Kh4 Qe7) 38.Qb3 (38.Qb5 Nf5 39.Rf5 ef5 40.Qe8 Kg7 41.Qe5–+) 38...Nf5 39.Rf5 Qd8 (better 39...ef5 40.c4 Rb2–+) 40.Rb5= Bc7 (better 40...e5!? 41.Re5 Rb7=) 41.c4+– f6? (better 41...f5 42.Be5 Be5 43.Re5 g5+–) 42.Rf3?? (better 42.Qe3 Qd7 43.Bf6 Ra4+–) 42...Rd1?? (42...g5 43.Rf2 gf4 44.Kg2 Be5 45.Be5 Rg7 46.Kh1 Rf2= (46...fe5?? 47.Rb8 Rd6 48.Rd8 Rd8 49.Nd3+–)) 43.Qe3 (43.Bf6!? Rg1 44.Kh2 Qf6 45.Kg1 Qd4 46.Qe3 Qe3 47.Re3 Bf4+–) 43...Ra6 44.Nd3 g5 45.Kg2 Rd6 (45...Bf4 46.Nf4 gf4 47.Qf4 Qd2 48.Qd2 Rd2 49.Kf1 e5+–) 46.Nf2 R1d2 47.Kf1 (47.fg5 f5+–) 47...f5 (47...Rc2 48.Qe4 (48.fg5?! Rd1 49.Kg2 Qd6=) 48...Rcd2 49.Bc3+–) 48.Rg3 g4 (48...h6 49.Be5 Rc2 50.fg5 h5+–) 49.hg4 Bb6 (49...Kf8 50.gf5 Rb2 51.Rb2 ef5 52.Rb7+–) 50.c5 Rd1 51.Nd1 Rd1 52.Kg2 (52.Ke2 Kf8 53.gf5 Rd2 54.Qd2 Qd2 55.Kd2 Bc7 56.Be5 h5 57.Rb7 Ba5 58.Kd3 Bd8 59.Bd6 Be7 60.Re7 h4 61.Rb7 Ke8 62.Rg8) 52...Qd5 53.Qf3 (53.Kf2 Bd8 54.gf5 Kf8 55.fe6 Rd2 56.Ke1 Rd1 57.Ke2 Qh5 58.Rf3 Rd6 59.e7 Ke8 60.ed8Q Kd8 61.Rb8 Kd7 62.cd6 Qh2 63.Kd3 Qc2 64.Kc2 Kd6 65.Qe5 Kc6 66.Rd3 h5 67.Qd6) 53...Rd2 54.Kh3 Rh2 (54...Qf3 55.Rf3 fg4 56.Kg4 Bc5+–) 55.Kh2 Bc7 (55...Qf3 56.Rf3 Bc7 57.gf5 Bd8 58.Rb8 Kf7 59.Rb7 Be7 60.f6 e5 61.fe7 ef4 62.e8Q Ke8 63.Ra3 f3 64.Ra8) 56.Qd5 ed5 57.gf5 (57.gf5 Kf8 58.Be5 h5 59.Bc7 Ke7 60.Rb7 Kd7 61.Bd6 Kc6 62.Rb6 Kd7 63.Rg7 Kd8 64.Rb8) 1–0. Wick,Dieter – Humm,Peter (1610), 17th RLP–Senioren–Open, 2019.

4.ab5+= ab5

5.e3 c6 6.Ra8 Ba8 7.Nf3 Nf6 8.Be2 (8.Bf6 ef6 9.c3 d5+=) 8...e6= 9.c3 Be7 10.0–0 0–0 11.Na3 d6 12.Nc2 Qb6 13.Qa1 Nbd7 14.c4 bc4 15.Bc4 d5 (15...c5 16.bc5 Qc5 17.d3 Bf3 18.gf3–/+) 16.Bb3 (16.Be2 Rb8= (worse is 16...Bb4 17.Nb4 Qb4 18.Ba3+–)) 16...Nc5 (better is 16...c5!?+=) 17.Bd4 Bb7? (17...Nb3 18.Bb6 Na1 19.Ra1+=) 18.Rb1?? (18.Qb1 Ba6 19.Bc5 Bc5 20.bc5 Qc5+–) 18...Ra8?? (better is 18...Nb3 19.Rb3 Qb5=) 19.Ba2 Qa6 20.bc5 Ne4 21.Nb4 Qa7 22.Bg7 f6 23.Bh6 Bc5 24.d3?? Bb4+/– 25.de4?? Qa2–/+ 26.Qa2 Ra2 27.g3 c5 28.Ne1 Ba6 29.ed5–/+ ed5 30.Bf4 Re2 31.Nf3 Bb7 32.Nd4+= Re1 33.Re1 Be1 34.Ne6 c4 35.Kf1 Bb4 36.Ke2 Bc8 37.Nd4 Kf7+= 38.f3 Bd7 39.h4 Bc5 40.Kd2 h5 41.Kc3 Bd4 42.Kd4 Be6 43.Bd6 ½–½. Kenanthonylucas – retiponziani, ChessWorld.net, 2012.

5.Ra8 Ba8

6.Na3 c6 7.Qa1 Bb7 8.Bg7 f6 9.Bh8 Nh6 10.c3 Kf7 11.e3 Kg8 12.Bf6! ef6 13.Nc2 Bg7 14.Nf3 d5 15.Qa7 Qc8 16.Ncd4 Nf7 17.Ne6! Nd7 (17...Qe6 18.Qb8 Deflection) 18.Nfd4 Nde5 (18...Nd6 19.f4 f5 20.Ng7 Kg7 21.Bd3+–) 19.Nc5 Nd6 20.Nb7 Nb7 21.Qa6 Qd7 22.f4 Nc4 (22...Nd8 23.fe5 fe5 24.Nb3+–) 23.Qc6 Qc6 24.Nc6 Kf7 25.Nd4 Nbd6 26.Bd3 Nb2 (26...f5 27.Nf5 Nc8 28.Ng7 Kg7 29.Ke2+–) 27.Bh7 Bh6 (27...Bf8 28.Ke2 Kg7 29.Bc2+–) 28.Ke2 Kg7 (28...Bf8 29.Ra1 Na4 30.Nb5 Nb5 31.Ra4+–) 29.Bc2 Kf7 30.Ra1 Nbc4 (30...Nc8 31.Bf5 Nd6 32.Ra7 Ke8 33.Bg6 Kd8 34.Rh7+–) 31.Ra7 Kg8 32.g4 Bf8 33.Ne6 Nb6 34.Bh7 Kh8 35.Nf8 Nbc8 (35...Nd7 36.Rd7 Nf7 37.Rf7 f5 38.Ng6) 36.Ng6 1–0. pcmvr – grahamtrue (2165), net–chess.com, 2015.

6.Na3 c6 7.Qa1 Bb7 8.Bg7 Nf6 9.Bh8 Bh6 (9...d5 10.Bf6 ef6 11.c3+–) 10.Bf6 ef6 11.e3 Na6 (11...d5 12.Bd3+–) 12.c3 Bg7 (12...Bf8 13.Nf3+–) 13.Nf3 f5 (13...Kf8 14.Qb1 h6 15.Qh7+–) 14.Qb1 Qf6 15.Nd4 Qe5 (15...Nc7 16.Qf5 Qf5 17.Nf5+–) 16.Nf5 Bf8 17.Be2 h6 (17...Nc7 18.f4 Qf6 19.0–0+–) 18.f4 Nc7 (18...Qe6+–) 19.fe5 Ne6 20.0–0 (20.Nd6 Kd8 21.Nb7 Kc7+–) 20...Ng5 21.Qd3 Bc8 22.Nd6 Bd6 23.ed6 Ne6 (23...c5 24.Nb5 Bb7 25.Qg6 Kf8 26.Rf5 Be4 27.Qh6 Kg8 28.Rg5 Bg6 29.Rg6 fg6 30.Bc4) 24.Qh7 (24.Qh7 Bb7 25.Qf7 Kd8 26.Qf8 Nf8 27.Rf8) 1–0. pcmvr – grahamtrue, net–chess.com, 2019.

6.Na3 c6 7.Qa1 f6 8.Nb5 cb5 (8...Bb7!? 9.Qa7 Qc8+–) 9.Qa8+– e5 (9...Nc6 10.Qd8 Kd8 11.c3+–) 10.c3 Bd6 (10...Qb6 11.e4+–) 11.e3 (11.e4 Qb6 12.Qd5 f5 13.ef5 Qc6 14.Qb5 Qe4 15.Ne2 Qf5+–) 11...Qb6 (11...Ne7 12.Bb5 Bc7 13.e4+–) 12.Qd5 Ne7 (12...f5 13.Qb5 Qc7 14.c4+–) 13.Qb5 Bc7 (13...Qc6 14.Nf3+–) 14.Qb6 Bb6 15.c4 Nbc6 (15...d6 16.d4+–) 16.c5 Bc7 (16...Ba7 17.b5+–) 17.b5 Na5 (17...Nb4 18.d4+–) 18.b6 (18.d4 e4+–) 18...Bb8 19.Bb5 (19.d4 d5+–) 19...Nec6 (19...Kd8 20.d4+–) 20.Ne2 (20.d4 ed4 21.ed4 Kd8+–) 20...0–0 (20...e4 21.Ng3 Bg3 22.hg3+– (22.fg3?! Nb3+–)) 21.Bc3 Rd8 (21...d6 22.d4 dc5 23.dc5+–) 22.d4 ed4 (22...Nb7 23.f4 g5 24.fg5 fg5 25.0–0+–) 23.ed4 (23.Bd4?! d6 24.0–0 dc5 25.Bc5 Bd6 26.Bd6 Rd6+–) 23...Re8 (23...Nb7 24.Bd2+–) 24.Ba5 Na5 25.Bd7 Re7 26.c6 Nc6 (26...Rd7 27.cd7 Nb7 28.d5+–) 27.Bc6 g5 (27...Kf7 28.Kd2+–) 28.h4 h6 (28...g4 29.Kd2 Kg7 30.Ra1+–) 29.hg5 hg5 30.Kd2 Kg7 (30...Rh7 31.Ra1 Rh8 32.Ra7+–) 31.Kd3 Re6 (31...g4 32.Be4 Re8 33.Bf5+–) 32.d5 Re7 (32...Re5 33.Nd4 g4 34.Ne6 Kf7 35.Rh7 Kg8 36.Rc7+–) 33.Nd4 Kg6 34.Rh8 Be5 35.b7 Kg7 (35...Rf7 36.Rg8 Kh7 37.Rd8 Rb7 38.Bb7+–) 36.Rd8 Bc7 37.Ne6 Kf7 38.Nc7 Rc7 39.b8Q (39.b8Q Kg6 40.Qc7 Kf5 41.Qh7 Kg4 42.Qe4 Kh5 43.Rh8) 1–0. pcmvr – grahamtrue, net–chess.com, 2017.

6.Na3 Bc6 7.e3 Nf6 8.Nb5 e6 9.c3 d5 10.Qa4 Qd7? (better 10...Be7+–) 11.Qa7+– Qc8 12.Nc7 Kd8 13.Nb5 Nfd7 14.Qa5 Ke8 15.Nc7 Ke7 16.b5 Bb7 17.Nf3 f6 18.Nd4 e5 19.Nde6 g5 (19...Kf7+–) 20.c4 (worse 20.Nf8 Kf8 21.h4 g4+–) 20...h5 (20...dc4 21.Bc4 Kf7 22.Ng5 Kg6 23.Nge6+–) 21.cd5 Bh6 (21...Kf7 22.b6+–) 22.Bd3 h4 (22...Kf7+–) 23.d6! Kf7 (23...Kd6 24.Qb4 Decoy) 24.Qa2 f5 25.Nd8 Kf8 (25...Kg7 26.Qf7) 26.Qf7 1–0. pcmvr – grahamtrue (2180), net–chess.com, 2016.

6.Na3 Nc6+=.

6.Nc3 c6 7.Qa1 Bb7 8.Qa7 (better 8.Nb5!? Nf6 9.Qa7+–) 8...Qc7= 9.Nf3 (9.e3=) 9...Nf6 (9...Na6!?=) 10.e4+– e6 11.e5 Nd5 12.Ne4 Nb4 (12...Qc8 13.c3+–) 13.Nd6 Bd6 14.ed6 Qc8 (14...Nc2? 15.Kd1 Qc8 16.Kc2+–) 15.Qc5 Nd5 16.Bg7 Rg8 17.Qd4 (17.Bb2 Rg4 18.Qa3 Kf8+–) 17...Na6 (17...c5 18.Qe5 Nc6 19.Qg5=+) 18.Bd3+– Nc5?? (18...f6 19.Bf6 c5+–) 19.Bh7+– (19.Qc5?! Rg7 20.0–0 Kf8+–) 19...e5 (19...Ne4 20.Bg8 Nd6+–) 20.Qe5 (20.Qe5 Ne6 21.Bg8+–; 20.Qc5?! Rg7 21.Bf5 f6+–) 1–0. Adlai – RuyLopez, corr, 2018.

6.Nc3 Nc6 7.Ba3 (7.e4 Nf6=) 7...e6 (7...e5 8.Qb1=) 8.Qb1 (8.Nb5!? Nb4 9.Bb4 Bb4 10.Qa1+=) 8...Na7= 9.e4 Nf6 10.f3 Bc6 11.Nge2 e5 (11...Nh5 12.Qa2=) 12.d4 d6 (12...Bd6 13.Bc1=) 13.d5 Bd7 14.Bc1 Be7 15.Be3 Qb8 (15...c5 16.dc6 Nc6 17.Nd5+= (< 17.Nb5 d5=+)) 16.Nc1 0–0 17.Nb3 (17.Qa1 c5+=) 17...c6 (17...Rc8!?=) 18.Qa2 (18.Qa1 Nc8 19.dc6 Bc6+/–) 18...Nc8 19.Qa6 (better is 19.dc6!? Bc6 20.Qa6+/–) 19...cd5= 20.ed5 Qc7 (better is 20...Bd8!?=) 21.Kd2+= (21.Nb5? Qc2 22.Qa3 Bb5 23.Bb5 Qg2–+) 21...Qb8 22.Na5 Bd8 23.Nc6 Bc6 24.dc6 (24.Qc6?! Bb6 25.Bb6 Nb6 26.Nb5 Nfd5 27.Qd6 Qc8=) 24...Bb6 25.Bb5 (better is 25.Bg5 d5 26.Bf6+/–) 25...Be3= 26.Ke3 d5 27.Kd2 e4 28.Kc1? ef3 29.g3 d4 30.Na2 Nd5 31.Qb7 Qe5 32.Bd3 Ncb6 33.c7 f2 34.Rf1 Na4 35.Kb1?? Qe1 36.Nc1 Qc3 (37.Bh7 Kh8 38.Nd3 Qa3 39.c3 Qb3 40.Ka1 Ndc3 41.Qd5 Qa3 42.Qa2 Qa2) 0–1. Roczniak,Jan – Mizielski,M, corr Poland, 1980.

6.e3 Nc6 7.Bb5 g6?? (better is 7...Nb4!? 8.Nf3 Bf3 9.Qf3 Nc2 10.Kd1 Nb4=) 8.Nf3 (8.Bh8 Ne5 9.Nf3 Bf3 10.gf3+– (10.Be5 Bd1 11.Kd1 e6–/+)) 8...Nf6+/– 9.d4 Bg7 10.c4 0–0 11.Nbd2 Na7 12.Ba4 c6 13.Bb3 e6 14.0–0 d5 15.cd5 cd5 16.Qc2 Nb5 17.Rc1 Qb6 18.Ne5 Ne4?? 19.f3 Ned6?? 20.f4?? Be5 21.fe5 Nf5 22.Kf2 Re8 23.Nf3 Bb7 24.Qc5+– Qc5 25.bc5 Bc6 26.Ba4 Ra8 27.Bb5 Bb5 28.Ra1 Ra1 29.Ba1 Bc6 30.Bc3 Kf8 31.Ba5 h6 32.g4 Ne7 33.h3 Ke8 34.Nd2 Kd7 35.Nb3 Bb5 36.Bb6 Nc6 37.Na5 Na5+= 38.Ba5 Bc6 39.h4 Ke7 40.g5 hg5 41.hg5 Kd7 42.Ke2 Kc8 43.Kd2 Kb7 44.Kc3 Ka6 45.Kb4 Bb5 46.Bb6 Bc6 47.Kc3 Kb5 48.Kd3 Kb4 49.Ke2 Kc3 50.Kf3 Kd3 51.Bc7 Kd2 52.Bd6 Kd3 53.Bc7 Bb5 54.Bd6 Bc6 55.Bc7 ½–½. Fournier,Frederic (1655) – BOY1954 (1605), ChessOK.com, 2012.

6.e3 Nf6 7.Nf3 (7.Bb5?? Bg2 8.Nh3 Bh1–+ (worse 8...Bh3 9.Qf3 Bg4 10.Qf4–+)) 7...Bc6 (7...e6 8.Bb5 Bb4 9.0–0=) 8.c4 (8.Nd4 e6+=) 8...bc4 9.Bc4 e6 10.b5 Bd5 (10...Bb7 11.0–0=) 11.Bf6+– Qf6 12.Bd5 ed5 13.Nc3 c6 14.b6 (14.Qa4 Qe6+–) 14...Bd6 (14...Bc5 15.Qb3+–) 15.0–0+– 0–0 16.Qa4 Bc5 (16...Qf5 17.Rb1+–) 17.b7 (17.Rb1 Qe6+–) 17...Bd6 (17...Qg6 18.Rb1+–) 18.Ra1 (18.Qg4 Bc7+–) 18...h5 (18...Re8 19.Qg4+–) 19.e4 (19.Qh4 Qh6+–) 19...g5 (19...de4!? 20.Ne4 Qg6+–) 20.ed5+– g4 21.Qe4?? (better 21.Qd4 Qh6 22.Ne4 gf3 23.dc6+–) 21...gf3–/+ 22.dc6 fg2 (22...Nc6 23.Rb1–/+) 23.Qg2 (better 23.Ra5 Rd8 24.Rf5=) 23...Qg6?? (better 23...Kh8 24.Ra5 Qh4=+) 24.Nb5+– Qg2 (24...Bh2 25.Kh2 dc6 26.Qf3+–) 25.Kg2+– Be5 (better 25...Bh2 26.c7 Bc7 27.Nc7 f5+–) 26.c7 Kg7 (26...Bc7 27.Nc7 f5+–) 27.c8Q (27.c8Q Ba1 28.d4+–) 1–0. GuestFTFT – GuestYHVW, freechess.org, 2018.

6.Nf3=.

3.a4 c6

4.ab5 cb5 5.e3 a6 6.Nf3 Nf6 7.c4 e6 (7...bc4 8.Bc4 Nc6 9.Na3=) 8.cb5+= Bb4 (8...ab5 9.Ra8 Ba8 10.Bb5 Bb4 11.Qa4+=) 9.Qb3 a5 10.Be2 (10.Nc3 d6+=) 10...0–0 (10...d6 11.0–0+=) 11.0–0 d5 12.d4 (12.Rc1 Ne4+=) 12...Nbd7 (12...Qd6 13.Ne5+=) 13.Rc1 Rc8 (13...Ne4!?+=) 14.Rc8+– Qc8 15.Ba3 Ba3 16.Qa3 (16.Na3?! Nb6+=; 16.Ra3?! Qc1 17.Bf1 Ra8=) 16...Qc2 17.Nbd2 a4? (better 17...Rc8+–) 18.Rc1+– Qg6 (18...Qf5 19.Rc7 Ba8 20.Bd3+–) 19.Rc7 Ba8 (19...Rb8 20.Qc3 h6 21.g3+–) 20.Qa4 Nb6 21.Qa7 Nc4 (21...Nfd7 22.Rd7 Nd7 23.Qd7+–) 22.b6 Nd2 23.Nd2 h5 (23...Qf5 24.b7 Bb7 25.Qb7+– (worse 25.Rb7 Qc2 26.Qa5 Ne4 27.Ne4 Qe2+–)) 24.b7 Bb7 25.Qb7 h4 (25...Qh7 26.Nf3 Qf5 27.h3+–) 26.h3 Nh5 (26...Ne4 27.Nf3 Qf6 28.Bd3+–) 27.Nf3 Qf6 (27...Nf6 28.Ne5 Qf5 29.Rf7 Rf7 30.Qf7 Kh7+–) 28.Ne5 Qf5 29.Rc8 Ng3 30.Rf8 Kf8 (30...Kh7 31.fg3 Qc2 32.Bd3 Qd3 33.Nd3 hg3 34.Qf7 Kh6 35.Rh8 Kg5 36.Rh5) 31.Qc8 Ke7 32.Qd7 Kf6 (32...Kf8 33.Qd8) 33.Qf7 (33.Qd8) 33...Kg5 34.Qg7 Qg6 35.Qg6 1–0. GuestWPHG – GuestRTQM, freechess.org, 2019.

4.ab5 cb5 5.e3 Nf6 6.Nf3 (6.Bb5?? Bg2 7.Be2 Bh1–+) 6...e6 (6...a6 7.c4=) 7.Bb5+= Bb4 8.0–0 0–0 9.d4 (9.Nc3 Nc6+=) 9...Qb6 (9...Nc6 10.Bd3+=) 10.Bd3+= Nc6 11.c4 Rfc8 12.Nc3 a6 (12...d6 13.Rb1 a5 14.Qe2+–) 13.Na4 (13.c5 Qc7+–) 13...Qd8 (13...Qc7 14.Qb3 a5 15.c5+–) 14.c5 (14.Rb1 a5+–) 14...Ba5 15.Qb3 (15.Ba3 Rab8+–) 15...Rcb8 16.Nb6 (better 16.Bc3!?+–) 16...Bb6=+ 17.cb6 Bc8 (17...a5 18.Ne5=+) 18.Ba3 Rb6 19.Qa4 Bb7 (better 19...Nd5!? 20.Bc5 Rb7=) 20.Bc5+– d6? (better 20...Rb2+–) 21.Bb6+– Qb6 22.Rfb1 (22.Rab1 Qa5 23.Qa5 Na5+–) 22...Qd8?? (22...Qc7+–) 23.Rb7 (23.Rb7 Ne7 24.Rc1+–) 1–0. Anonymous – Anonymous, lichess.org, 2020.

4.ab5 cb5 5.Nf3 Nc6 6.e3 a6 7.c3 Nf6 8.Be2 d5 9.0–0 e6 10.d3 Bd6 11.h3 Ne5 (11...0–0!?=) 12.Ne5+= 0–0?? (better is 12...Be5 13.Nd2 Rc8+=) 13.Ng4 Be7 (13...Ng4 14.Bg4 a5 15.ba5 Ra5 16.Ra5 Qa5 17.Nd2+–) 14.Nf6 Bf6 15.Nd2 Qd6 16.Rb1 (16.Nb3 g6+–) 16...Bd8 17.Bf3 Bc7 18.g3 Rab8 19.c4 dc4 20.Bb7 (20.dc4?! Bf3 21.Nf3 bc4+–) 20...Rb7 21.dc4 Rd8 22.Ne4 (better is 22.Qg4 Qf8 23.Rbd1 bc4 24.Bc3+–) 22...Qb4 (22...Qd1 23.Rfd1 bc4+–) 23.Qg4 Qf8 (23...g6 24.Qh4 h5+–) 24.Nf6 Kh8 25.Nh5 (better is 25.Qe4 gf6 26.Bf6 Qg7 27.Bg7 Kg7 28.Qb7+–) 25...e5 26.cb5 Rb5 27.f4 (27.e4!? f6 28.Ba3 Qf7+–) 27...f6 (27...f5 28.Qg5 h6 29.Qg6+–) 28.fe5 Be5 29.Be5 Re5 30.Rb7 Rg5 (30...Re7 31.Rfb1+–) 31.Qf3 (better is 31.Qg5! fg5 32.Rf8 Rf8 33.Rg7 h6+–) 31...Rdd5 (31...Qd6+–) 32.Ng7! Rg7?? (better is 32...Qd6 33.Nh5! Rh5 34.Qf6 Qf6 35.Rf6 Rd8+/–) 33.Rg7 Qg7 34.Qd5 Qg3 35.Qg2 Qe3 36.Qf2 Qg5 37.Kh2 Kg7 (37...Qe5 38.Qg3 a5+–) 38.Rg1 1–0. pushtiu (2245) – grahamtrue (2165), net–chess.com, 2015.

4.Nc3 a6 5.ab5 ab5 6.Ra8 Ba8 7.Qa1 Bb7 8.Nb5 Nf6 9.Qa7Qc8 10.Na3 Nd5 (10...d5!?+–) 11.c3+– e6 12.Nf3 Ba6 (12...Be7 13.Nc4+–) 13.e4 Bf1 14.Kf1 (14.ed5?? Bg2 15.Rg1 Bf3 16.de6 fe6–+) 14...Nf4 15.Nc4 Nd3 (15...Be7 16.Qe3 d5 17.Qf4 dc4 18.Ne5+–) 16.Ba3 Be7 17.Qd4 White intends e5 17...Nf2?? (17...d5 18.Qd3 dc4 19.Qc4 Nd7+–) 18.Qg7 Rf8 19.Kf2 h5 (19...d5 20.ed5 cd5 21.Ne3+–) 20.e5 Qa6 (20...Qc7+–) 21.b5! Qb5 (21...Qb5 22.Nd6 Double attack (22.Nd6 Decoy); 21...cb5 22.Nd6 Deflection) 22.Be7 Ke7 (22...Qc5 23.Bc5 d6 24.Nd6 Ke7 25.Nf7 Kd7 26.Nd6 Rf7 27.Qf7 Kd8 28.Bb6) 23.Qf6 Ke8 24.Nd6 1–0. pcmvr – grahamtrue, net–chess.com, 2019.

4.Nc3 a6 5.Nf3 f6 6.Ne4 d5 (6...e5!? 7.Nc5 Bc5 8.bc5 Nh6=) 7.Nc5+/– e6? (better is 7...Qc8+/–) 8.Nb7+– Qc7 (8...Qb6 9.Nc5! Bc5 10.bc5 Qc5 11.e3+–) 9.Nc5 a5 (9...Bc5 10.bc5 Nd7+–) 10.Ne6 Qf7 11.Nfd4 Bb4 12.ab5 Ne7 13.Nc7 Kd7 14.Na8 Na6 15.Nb6 Kc7 16.ba6 h6 17.Na4 g5 18.e3 Ra8 19.h4 g4 20.Qg4 Kb8 21.Qd7 Ra7 22.Qd8 Nc8 23.Nc6 Ka8 24.Nb6 (24.Qc8 1–0. michaelbuss – Eryx, ChessWorld.net, 2007.

4.e3 e6 5.ab5 Bb4?? (5...cb5 6.Nf3 A) 6...Bb4?? 7.Bg7 (7.Bb5?! Nf6=) 7...a6 8.Bh8+–; B) 6...Nf6=) 6.Bg7 (6.bc6 dc6 7.Bg7 Nf6 8.Bh8 Nbd7+–) 6...cb5 7.Bh8 f6 (7...Nf6 8.c3 (8.Bb5?! Bg2 9.Ra4 Bf8+–) 8...Bf8 9.Qc2+– (9.Bb5?! Bg2 10.Nf3 Bh1+=)) 8.Qh5 (8.Qg4!? Ne7 9.Qb4 Kf7 10.Qb5 Be4+–) 8...Ke7 (8...Kf8 9.c3 Bd6 10.Qh7+–) 9.c3 Bd6 (9...Ba5 10.Qh7 Kd6 11.Ra5 Qa5 12.Qg8 Qa2 13.Qg3 Ke7+–) 10.Qh7 Kf8 11.Qg7 Ke8 12.Qg6 (12.Qg8 Bf8 13.Qg6 Ke7 14.Bf6 Kd6 15.Qg3 Kc6 16.Bd8 d6 17.Bb5 Kb5 18.Qf4 Be4 19.Qe4 d5 20.Ra5 Kc6 21.Qe6 Bd6 22.Qc8 Bc7 23.Qc7) 12...Ke7 13.Qg7 Ke8 14.Qg8 Ke7 15.Qg7 Ke8 16.Qg6 Kf8 17.Bg7 Ke7 18.Bf6 Kf8 19.Qg7 Ke8 20.Qg8 Bf8 21.Qg6 1–0. DEFFM – GuestBFLZ, freechess.org, 2018.

4.e3 e6 5.ab5 cb5 6.Nf3 (6.Bb5?? Bg2 (6...Bb4 7.Bg7 Nf6 8.Bh8 Bg2 9.Ra4+–) 7.Bg7 Bg7–+ (7...Bh1?! 8.Bh8 Qg5 9.Ne2 Qb5 10.Ng3–+)) 6...a6 (6...Bb4?? 7.Bg7 (7.Bb5?! Nf6=) 7...Nf6 8.Bh8+–) 7.c4 bc4 (7...Bb4?? 8.Bg7 (8.cb5?! Nf6=) 8...bc4 9.Bc4+–) 8.Bc4 d5 (8...Qb6 9.Qa4=) 9.Bb3 (9.Be2 Nf6 (9...Bb4 10.Bg7 Nc6 11.Bh8+–) 10.b5 a5=) 9...Nf6 (9...Bb4?? 10.Bg7 Nf6 11.Bh8+–) 10.Ba4 Nbd7 11.Ne5 Bd6 12.Nd7 Nd7 13.Qg4 Rg8 14.0–0 (14.Bg7? Bf8 15.Rg1 Rg7–+) 14...Kf8 15.f4 f5 (15...Bb4 16.f5 Be7 17.Bd7 Qd7 18.fe6+–) 16.Qh3 Nf6 17.Bc3 h6 18.Na3 Ne4 19.Nc2 Rc8 20.Nd4 Qe7 Attacks the isolani on b4 21.Rac1 Bb4? (21...Kf7 22.Bc2=) 22.Bb4 (better 22.Nf5!? ef5 23.Qf5 Nf6 24.Bb4 Qb4 25.Rc8 Bc8 26.Qc8 Kf7 27.Qc7 Qe7 28.Qb6+–) 22...Qb4+= 23.Ne6 Ke7 24.Ng7 Rg7? (24...Qa4 25.Nf5 Kf6 26.Nh6 Rgf8+–) 25.Rb1+– Qa4?? (25...Qd6 26.Rb7 Rc7 27.Rc7 Qc7 28.Qh6 Rf7 29.Qa6 Nd2+–) 26.Rb7 Kf6 (26...Ke6 27.Qh6 Nf6 28.Qg7 Qe8+–) 27.Qh6 Rg6 28.Qh4 Ng5 29.fg5 Rg5 30.Qa4 (30.Qa4 Re8 31.Qd4 Ke6 32.Rb6 Kd7 33.Qd5 Ke7 34.Qd6 Kf7 35.Qf6 Kg8 36.Qg5 Kf7 37.Rf5) 1–0. onur604 (2320) – Bojan36 (2165), lichess.org, 2020.

4.Nf3 d6 5.e3 a5 6.ab5 ab4 7.bc6 (7.Ra8 Ba8 8.c3 Qa5+/–) 7...Ra1? (7...Nc6 8.Ra8 Qa8 9.Bb5+=) 8.Ba1 (better is 8.cb7!? Ra5 9.c3+/–) 8...Nc6+= 9.Be2 e5 10.0–0 Nf6 11.d3 Qa8 12.Nbd2 Be7 13.Bb2 0–0 14.Nc4 Qa7 15.Qa1 Qa1 16.Ba1 Ba6 17.Ncd2 Ra8 18.Ng5 h6 19.Nge4 Bc8 20.Nf6 Bf6 21.Ne4 Be7 22.Bf3 Ra2 23.Nd6 Bd6 24.Bc6 Rc2 25.Bd5 (25.Be4 b3 26.d4 ed4 27.Bd4 Ba3–/+) 25...Ba6 26.Be4 (26.Rd1 Bd3 27.Bb3 Re2+=) 26...b3 (26...Rd2!? 27.Rc1 Bd3 28.Bd3 Rd3 29.Kf1–+) 27.Rb1–/+ b2?? (better is 27...Ba3 28.d4 Re2–/+) 28.Bb2+/– Rd2 29.Bc3 Ra2 30.Bd5 (better is 30.Rb6 Bc7 31.Rc6+/–) 30...Rc2= 31.Be1 Bd3 32.Ra1 Rc8 33.e4 Bc5 34.Rd1 Be2 35.Rb1 Bd4 36.g3 Bf3 37.Bd2 g5 38.h4 g4 39.Bh6 Ba7 (39...Rc2 40.Rb8 Kh7 41.Be3=) 40.Bg5 (better is 40.Rb7 Rb8 41.Bf7 (41.Ra7 Rb1 42.Bc1 Rc1 43.Kh2 Rh1) 41...Kh7 42.Rb8 (42.Ra7 Rb1 43.Bc1 Rc1 44.Kh2 Rh1) 42...Bb8 43.Bg5+–) 40...Kg7? (40...Rc7 41.h5+=) 41.Rc1?? (better is 41.Rb7 Rb8 42.Rf7 (42.Ra7?? Rb1 43.Bc1 Rc1 44.Kh2 Rh1) 42...Kg6 43.Rc7+– (43.Ra7?? Rb1 44.Bc1 Rc1 45.Kh2 Rh1)) 41...Rb8+= 42.Be3 Be3 43.fe3 Rb2 44.Rc7 Re2 45.Rf7 Kg6 46.Rf5 Re3 Attacks the isolani on e4 (46...Rd2!?+=) 47.Re5+/– Kf6 (47...Bd1!?+/–) 48.Rf5+– Kg6 49.Rg5 Kh6 50.Kf2 Re2 51.Kf1 Rg2 ½–½. cristero (2460) – smoothoperator (2255), net–chess.com, 2015.

3.Nc3 a5

4.a3 ab4 5.ab4 Na6 6.Nb5 c6 7.Nd4 Nb4= 8.e3 Nf6 9.Ngf3 g6 10.Bc4 Bg7 11.c3 Nbd5 12.0–0 0–0 13.Ne5 c5 14.Nc2 d6 15.Nf3 e5 16.d4 Nb6 17.Be2 Ne4 18.de5 Na4–/+ 19.Qb1 Be5 20.Ra3 Bc3 21.Bc3 Nec3 22.Qb7 Ne2 23.Kh1 Qb8 24.Rb1 (24.Qd7 Ra7 25.Qg4 Nac3–/+) 0–1. Gerold,Guenther – Heymach,W, corr DDR, 1985(?).

4.ba5 Ra5 5.a3=.

4.ba5 Ra5 5.e4 b4 6.Nd5 Bd5 7.ed5 Rd5 8.Bc4 Rc5 9.d3 Nc6 10.Nf3 Qa8 (10...d5 11.Bb3=+) 11.Qb1 (11.0–0 d5 12.Bb3 Ra5=) 11...Qa5 (better 11...d5!? 12.Bb3 Ra5=+) 12.0–0= e6 (12...d5 13.Bb3 Qa6 14.a3+–) 13.a3+– d5? (better 13...Nd8+–) 14.ab4+– Qb4 15.Ra8 Ke7 16.Bb3?? (16.Ba3 Qb1 17.Rb1 Kf6 18.Rf8 Ra5 19.Bb2 Ke7 20.Bd5 Kf8 21.Bc6 Ra6+–) 16...Qb7? (16...Ra5 17.Ra5 Qa5 18.Qc1+=) 17.Ra1?? (17.Qa1!? Nb8+–) 17...f6? (17...Rb5!?=) 18.c4 (18.Bd5 Kf7 19.Be4 Bd6+–) 18...Nb4 (18...Kf7 19.Ba3 dc4 20.Bc5 Bc5 21.Bc4 Qb1 22.Rab1 Nge7+–) 19.d4+– Rc6 (19...dc4!? 20.dc5 cb3 21.Ba3+–) 20.cd5 Nd5?? (20...Rb6 21.de6 Nd5 22.Ba3 Ke8 23.Ba4 c6+–) 21.Bd5 ed5 (21...Kd7 22.Bc6 Qc6+–) 22.Ba3 Ke8 23.Qb7 Ne7 24.Qc6! (24.Qc6 Nc6 25.Bf8 Rf8 26.Ra8 Ke7 27.Rf8 Kf8 28.Rc1+–) 1–0. alt20 – Maxine2013, lichess.org, 2014.

3.Nc3 a6

4.a3 e5 5.d4 (5.e4 Nf6=) 5...e4 6.e3 (6.Qd2 d5+=) 6...Nf6 7.d5 Bd6 8.Qd2 (8.f4 ef3 9.gf3 Be5+=) 8...Qe7 (8...Be5 9.0–0–0+=) 9.Nd1 Be5 (9...Nd5 10.Bg7 Rg8 11.Bb2+=) 10.c4= 0–0 11.Nh3 (11.Be5 Qe5 12.Nc3 bc4+=) 11...Qd6 12.c5 Qe7 13.Nc3 (13.a4 ba4 14.Bc4 Bb2 15.Nb2 Qe5+=) 13...Nd5!–/+ 14.Nd5 (14.Qd5 Bc3) 14...Bd5 15.Nf4 Bb3 16.Be5 (16.Rb1 Bf4 17.Qc3 Bh6 18.Qb3 Nc6+=) 16...Qe5 17.Rc1 f5 (17...Be6 18.Qd4 Qf5 19.g4 Qg4 20.Qe4–/+) 18.Be2+= g5 19.Nh3 h6 (19...Qe7 20.Qc3 Bf7 21.0–0+=) 20.0–0 (20.Rc3 Be6–/+) 20...Qd5 (20...Nc6 21.Rc3 Be6 22.f4 ef3 23.Bf3–/+) 21.Rcd1 (21.Qb2 Nc6+=) 21...Qd2–/+ 22.Rd2 Be6 23.f4 (23.f3 ef3 24.Bf3 Ra7–/+) 23...g4 24.Nf2 Nc6 25.h3 h5 (25...gh3 26.gh3 Rf7 27.Kh2–/+) 26.g3 (26.hg4 hg4 27.Nd1 Rad8–/+) 26...Kg7 (26...Ne7 27.Rfd1–/+) 27.Kg2 (27.Rfd1 Kf6–/+) 27...Kf6 28.Nd1 Rh8 29.Nc3 gh3 30.Kh3 Rag8 31.Rfd1 Rh7 32.Kh4 Rg4 33.Kh3 Rg6 34.Kh4 Ne7 35.Rd4 Rg4 36.Kh3 Rg8 37.Rg1 h4 38.g4 Kf7 39.g5 Kg6 40.Rd2 c6 41.Rh1 Ra8–/+ 42.Bf1 a5–+ 43.Bg2 ab4 44.ab4 Ra3 45.Rc1 Nd5 46.Nd5 Bd5 47.Re1 Rh8 48.Rd4 Kf7 49.Bh1 Ke6 50.Rdd1 d6 51.cd6 Kd6 52.g6 Ke6 53.Ra1 Ra4 54.Rg1 Kf6 55.g7 Rg8 56.Rgb1 Rg7 57.Kh4 Rga7 58.Ra4 ba4 59.b5 Rb7 60.Rd1 Rh7 61.Kg3 cb5 62.Rd5 Rh1 63.Rb5 a3 64.Rb6 Ke7 65.Rb7 Kd6 66.Ra7 Ra1 67.Ra5 a2 68.Kg2 Kc6 69.Ra6 Kb7 70.Ra5 Kb6 71.Ra4 Kb5 72.Ra7 Kb4 73.Ra8 Kc3 74.Ra7 Kd3 75.Ra3 Ke2 76.Ra5 Ke3 77.Ra8 Kf4 78.Ra4 Kg4 79.Ra8 e3 80.Ra4 f4 81.Ra8 f3 82.Kh2 f2 83.Rg8 Kf3 84.Rg3 0–1. Verbnik – Paige, corr, 1996.

4.a3 e6=.

4.a3 Nf6 5.d3=.

4.a4 ba4 5.Na4 d6 0–1. piolopakyawan – croach (2395), net–chess.com, 2011.

4.e3 e5 5.a3=.

4.e3 e5 5.Qg4 Nf6 6.Qh4 Be7 7.Qg3 0–0 8.Qe5 Bb4 (8...Nc6 9.Qf5 Nb4 10.Rc1+=) 9.0–0–0 (9.Nb5!? ab5 10.Qb5+=) 9...Re8–/+ 10.Qf4 Bc3 11.Bc3 c5 (better is 11...Nd5 12.Qd4 Nc3 13.Qc3 Bd5–/+) 12.Bf6+= Qf6 13.Qf6 gf6 14.f3 c4 15.e4 d5 16.ed5 Bd5 17.a3 f5 18.c3 Nc6 19.Ne2 Ne5 20.Nd4 f4 21.Be2 (21.d3 Rad8=) 21...Nd3 22.Bd3 cd3 23.Rde1 Bc4 24.Re4 Re4 25.fe4 Re8 26.Re1 f6 27.Nf5 (27.Nf3 Bf7=) 27...Re6 (27...Bd5!–/+) 28.Nd4= Re5 29.g3 fg3 30.hg3 h5 31.Kb2 Kg7 32.Nc6 Rg5 33.Re3 White prepares e5 33...Rg4 34.e5 fe5 (better is 34...h4!? 35.gh4 Rg2 36.ef6 Kf6=) 35.Ne5+/– Rg5 36.Nc4?? (better is 36.Nd3 Rf5 37.Kc2+/–) 36...bc4–/+ 37.Re4 Rg3 38.Rc4 Rg2 39.Kc1 Rg1 ½–½. Mr.Oldenslo (1910) – Brummie_Red (1880), ChessWorld.net, 2014.

4.e3 e6 5.a4 (5.a3 Nf6=) 5...Nf6 6.ab5 Bb4 7.Nf3 0–0 8.Ra4 Bc3 (8...Qe7 9.Be2=) 9.Bc3 ab5 (Better is 9...Ne4=) 10.Rh4?? (Better is 10.Ra8 Ba8 11.Bb5=) 10...Ne4–+ 11.g3 Nc3 12.dc3 Qf6 13.Bd3 g6 (14.e4 Qc3 15.Ke2 f5–+; 13...h6 14.e4 Qc3 15.Ke2–+) 0–1. Lus – Rosenhahn, corr 3GMM–51, 1995.

4.e4 d6 5.d4 Nf6 6.Bd3 e5 7.Nf3 ed4 8.Nd4 c5 9.bc5 dc5 10.Nf5 c4 11.Be2 Qd1=+ 12.Rd1 b4 13.Nd5+= Nd5 14.ed5 c3 15.Ba1 g6 16.Ne3 Bc5 17.0–0 0–0 18.Bf3 Nd7 19.Nc4 a5 20.Rfe1 a4 21.a3 Ba6 22.ab4 Bb4 23.Rb1 Bc5 24.Na5 Bd3 25.cd3+= c2? 26.Rb7+– Ra5 27.Rd7 Rb5 (28.d6 Rb1–+) 0–1. Wordtmann,Gerhard – Cane,Luisito, CiF, 1991.

4.e4 e5 5.a3 d6 (5...Nf6!?=) 6.Nf3 Qf6 (6...Nf6 7.Bd3+=) 7.Be2 (7.a4 ba4 8.Bd3 Ne7+–) 7...Ne7 (7...Qg6 8.0–0 Nf6 9.Bd3+/–) 8.0–0 c6 (8...Nbc6 9.a4 ba4 10.Ra4+–) 9.d4 (9.a4 g6+–) 9...ed4 (9...Ng6 10.Bc1 Nf4 11.Bf4 ef4 12.e5+/–) 10.Nd4 (10.Qd4?! Qd4 11.Nd4 Nd7+/–) 10...Qg6?? (better is 10...Nd7+–) 11.Bh5 Qf6 (11...Qh6 12.Bc1 g5+–) 12.Nde2 (better is 12.Ncb5 ab5 13.Nf5 Nf5 14.Bf6+–) 12...g6?? (better is 12...Ng6+–) 13.Bf3 (better is 13.Nb5 Qb2 14.Nd6 Kd7 15.Nc4 Ke8 16.Nb2 gh5+–) 13...Bg7 (13...Qg5 14.Nb5! ab5 15.Bh8 Ng8+–) 14.Na4!! Qg5 (14...ba4 15.Bf6) 15.Bg7 Rg8 16.Nb6 Rg7 17.Na8 Ba8 (17...Nd7 18.Qd6 Qe5 19.Qe5 Ne5 20.Nb6+–) 18.Qd6 Nd7 19.Rad1 Nd5 (19...Rg8 20.Qd7 Kf8 21.g3+–) 20.ed5 cd5 21.Qa6 Qd8 22.Qb5 (better is 22.Bd5 Bd5 23.Rd5 f6+–) 22...f5 23.Bd5 Bd5 24.Rd5 Kf8 25.Nf4 Re7 26.c4 Qc8 27.h3 Kf7 28.Rfd1 Nf6 29.Rd8 Qc7 30.g3 Qa7 31.c5 Qa3 32.Qc4 Kg7 33.Ne6 Kh6 34.Qh4 Nh5 35.Qg5 1–0. mic (2195) – grahamtrue (2230), net–chess.com, 2009.

4.e4 e5 5.Nf3 Bb4=+ 6.Ne5 (better 6.Nd5 Bd5 7.ed5=+) 6...f6?? (6...Qe7 7.Ng4 Bc3 8.Bc3 Be4 9.Qe2=+) 7.Nd3 (better 7.Qh5 Ke7 8.Qf7 Kd6 9.Qg7 fe5 10.Qh8+–) 7...Bc3=+ 8.Bc3 Be4 9.Qe2 (9.Be2 Ne7=+) 9...Qe7 10.0–0–0 Nc6 (10...Bd3 11.Qd3 Nc6 12.Qd5–/+) 11.Qg4 (11.Re1 d5 12.Qd1+=) 11...f5?? (better 11...Nh6!? 12.Qf4 d5=+) 12.Qg3 (better 12.Qg7 Qg7 13.Bg7 Bd3 14.Bd3+– (14.Bh8?! Bf1 15.Rhf1 Kf7+–; worse 14.cd3 Nf6 15.Bh8 Ng4+–)) 12...Nf6=+ 13.Re1 (13.Qc7? Nd5 14.Qg3 Nc3 15.dc3 0–0–+) 13...0–0 14.f3 Qa3 (14...Qf7 15.fe4 Ne4 16.Qc7 Rac8= (worse 16...Nc3 17.dc3 Ra7 18.Qd6+–)) 15.Bb2+– Qa2 16.fe4 Ne4?? (better 16...fe4 17.Re4 Rf7+–) 17.Qg7 1–0. Nikitina,Zoya N (1735) – Migutina,Maria (1645), Open Tver Region Championship, 2014.

4.e4 e5 5.Nf3 Nc6 6.a4 Nf6 7.ab5 ab5 8.Nb5 Bb4 9.Ra8 Ba8=.

4.e4 e5 5.Nh3 h6 (5...Bb4!? 6.Nd5 Bd5 7.ed5 Nf6+=) 6.a4 ba4 7.Ra4 Nc6 8.Nd5 Nf6 9.Bc3 (better is 9.Bc4!?+=) 9...Ne4–/+ 10.Qb1 Nd4 11.Bd4 ed4 12.Bd3?? (better is 12.Qb3–/+) 12...Bd5–+ 13.Be4 Be4 14.0–0 Bc6 15.Ra5 Qf6 16.Re1 Be7 (better is 16...Kd8–+) 17.d3?? (better is 17.Rae5–/+) 17...0–0–+ 18.f3 Rab8 (18...Rfb8 19.Ra2–+) 19.Nf2 (19.Ra6 Bb4 20.Re2 Bc3–+) 19...Bb4 20.Qa1 (20.Ra6 Be1 21.Qe1 Qg5–+) 20...Ba5 (better is 20...Bc3 21.Ne4 Be4 22.Ra6–+) 21.Qa5 Rb6 22.Qc5 d6 23.Qc4 d5 24.Qc5 Rfb8 25.Ng4 Qf4 26.Qc3 0–1. 488 – Daz101, ChessWorld.net, 2012.

4.e4 e6 5.a3 c5 6.bc5 Bc5 7.d4 Bb6 8.Nf3 Nf6 (8...Ba5 9.Bd3=) 9.Bd3 (9.e5 Ng4=) 9...Ba5=+ 10.0–0 Bc3 11.Bc3 Ne4 (11...Be4 12.Re1 d5 13.a4=+) 12.Bb2 (12.Bb4 f5=) 12...Qc8 (12...0–0 13.Re1 d5 14.Qe2=+) 13.d5 (13.Re1 Nc3 14.Bc3 Qc3=+) 13...Bd5 14.Bg7 (14.Re1 f5 15.Bg7 Rg8–/+) 14...Rg8–/+ 15.Be4 (better is 15.Be5–/+) 15...Rg7?? (better is 15...Be4 16.Be5 Qc6–+ (16...Qc2 17.Qc2 Bc2 18.Rfc1+/–; 16...Bc2? 17.Rc1+–)) 16.Bd5+/– ed5 17.Qd5 Nc6 (17...Qc6 18.Rfe1 Kf8 19.Qe5+/–) 18.Rfe1 Kf8 (18...Kd8 19.Ng5 Kc7 20.Rad1+– (20.Nf7?! Qg8 21.Qd6 Kc8=)) 19.Re2 (19.Rad1+/–) 19...Ne7 (better is 19...Qc7!?+/–) 20.Qd6+– Qd8? (20...f5 21.Re7! Re7+–) 21.Rae1 f5 22.Re7! Re7 23.Qf6 Rf7 24.Qh8 1–0. Zuzu – michas, internet, 2005.

4.e4 Nf6!?=.

4.Nf3 e6 5.e3 Bb4 6.a3 (better 6.Nb5!? Nf6 7.Bf6 gf6 8.Nbd4+=) 6...Be7 7.Nb5 Nf6 (7...ab5 8.Bg7 Bf6 9.Bh8 Bh8 10.c3=) 8.Nbd4= 0–0 9.Ne5 (9.Rb1 Nc6=) 9...d6=+ 10.Nef3 c5 11.Nb3 a5 (11...Qc7 12.Rb1=+) 12.Bd3 (12.Rb1 e5=) 12...d5 (12...e5 13.Be2=+) 13.Bb5 (better 13.Be2=+) 13...a4–+ 14.Nc1 Bc6 (better 14...Qb6!? 15.Rb1 Qb5 16.Bf6 Qb1 17.Be7 Rc8–+) 15.Bc6 Nc6 16.0–0 Bd6 17.Nd3 (17.c4 Re8=+) 17...Re8 18.h3 (18.Nde5 Ne5 19.Be5 Rb8=+) 18...e5–/+ 19.Nde1 d4 20.ed4 ed4 21.Nd3 Qc7 22.Kh1 (22.Re1 Re1 23.Nde1 Rb8–/+) 22...Ne5 (22...Ne4 23.c4–/+) 23.Nfe5 Be5 24.Ne5 (24.c3 dc3 25.Bc3 Bc3 26.dc3 Ne4=+) 24...Re5 25.c3 Rb8 (25...Qd7=+) 26.Rb1 (better 26.cd4!? Rg5 27.Rb1=) 26...Re6 (26...c4 27.Ba1 Rb1 28.Qb1–+) 27.cd4 (better 27.Qc2 Reb6 28.cd4–/+) 27...cd4?? (better 27...Reb6–+) 28.Bd4+– Rb1 29.Qb1 Ng4 (better 29...Qd6 30.Bf6 Rf6+–) 30.hg4?? (better 30.f4 Nh6 31.f5+–) 30...Rh6 31.Kg1 Qh2 0–1. PolitePredator (1635) – retiponziani (1800), ChessWorld.net, 2011.

4.Nf3 Nf6=.

3.Nc3 d5

4.Nb5 a6 5.Nd4 e6 6.f4 (6.e3 e5 7.Ndf3 e4+/–) 6...Nf6 (6...Qd6 7.e3+=) 7.Ngf3 (7.a3!?+=) 7...Bb4= 8.e3 0–0 9.Bd3 (9...c5 10.a3=). C_D_B7 (1605) – oasis, chessHere.com, 2006.

4.Nb5 Nf6 5.d3 (5.Be5 Na6 6.c3 Nd7+/–) 5...e6 6.e3 e5 (better is 6...Bb4!? 7.c3 Be7+=) 7.Be5+/– Qe7?? (better is 7...Bb4 8.c3 Ba5+/–) 8.Nc7+– Kd8 9.Na8 (better is 9.Bg3 Qb4 10.Ke2 Nh5 11.Na8 Ng3 12.hg3 Qg4 13.Nf3 Ba8+–) 9...Ba8?? (better is 9...Qe5 10.Rb1 Qc3 11.Qd2 Qd2 12.Kd2 Ba8+/–) 10.Bb8 (10.Nf3!? Nc6 11.Bc3 Nb4+–) 10...Qb4 11.Qd2 Qb8 12.c3 Ba3 13.e4 (13.Ne2 Bc6+–) 13...de4 14.de4 Nd7 15.Bc4 Ke7 16.Qg5 Ke8 17.Qg7 Ke7 18.Rd1 Qf8 19.Qg5 f6 20.Qf5 Qd8 21.Qe6 Kf8 22.Qf7 1–0. WirralBoy – gordiemac, ChessWorld.net, 2012.

3.c4 bc4

4.Na3+=.

4.e3 e6 5.Bc4?? (better 5.Nf3 d5 6.Bc3=+) 5...Bg2–+ (5...Bb4?! 6.Nf3 Nf6 7.Nc3–/+) 6.Nf3 (6.Bg7 Bg7 (6...Bh1?! 7.Bh8 Bb4 8.Be6–/+) 7.Qg4 Ba1 8.Qg2 d5–+) 6...Bh1 7.Qa4 (7.a3–+) 7...Bf3 8.Nc3 (8.d4 a5! 9.ba5 Qh4–+) 8...Nf6 (better 8...Qh4 9.Be2 Be2 10.Ke2 Qh5 11.Ke1–+) 9.Ne4 (9.a3 Bd6–+) 9...Be4 (9...Ne4 10.d3 Nd6 11.Qc2–+) 10.0–0–0 Be7 (10...Ng4 11.d3 Bg6 12.Qc2–+) 11.f3 Bf3 12.Rf1 Be4 (12...Bc6 13.Qb3–+) 13.b5 0–0 (13...a6 14.Bf6 Bf6 15.Be6 de6 16.Qe4–+) 14.Bb3 d6 (14...Bd3 15.Rg1–+) 15.d3 Bd3 16.Qh4 Bg6 (better 16...Bf1 17.a4–+) 17.Rg1 Nbd7 (17...c6 18.bc6 Nc6 19.Kd1–+) 18.Bc2 c5 (18...a6 19.Bg6 fg6 20.ba6–+) 19.Bf6 Bf6 20.Bg6 fg6 (better 20...Bh4 21.Bc2–+) 21.Qg4 Ne5 (21...Qe8 22.Qd1–+) 22.Qe6 Kh8 23.Rg3 Re8 24.Qb3 c4 25.Qc2 Qa5 26.Rh3 Nd3 (26...Qe1 27.Qd1 Nd3 28.Kc2 Qc3 29.Kb1 Qb2) 27.Kd1 (27.Qd3 cd3 28.Kd1 Qa2 29.Rg3 Qe2 30.Kc1 Qc2) 27…Qe1 0–1. Agiant (1655) – JorgeMario1 (1690), lichess.org, 2019.

3.c4 c5

4.a3 a6

5.d3 d6

6.Nd2 Nd7

7.Nb3 Nb6

8.Rc1 Rc8

9.Na5 Ba8 10.cb5 ab5 11.e3 Na4 12.Ba1 Nf6 13.Nf3 e6 (13...d5 14.Nb3 cb4 15.Rc8 Qc8 16.ab4+=) 14.Qd2 (better 14.Bf6!? gf6 15.d4+–) 14...Be7 15.Be2 0–0 16.0–0 h6 17.bc5 dc5 18.Nb3 Bd5 19.Qc2 Bb3 (better 19...c4!? 20.Bf6 Bf6 21.dc4 Bc4 22.Bc4 Rc4=+) 20.Qb3+= Qb6 21.Rb1 Rb8 22.Ne5 (22.Qc2 Rfd8+=) 22...Bd6 (better 22...Rfd8=) 23.Nc4?? (better 23.f4+=) 23...bc4–+ 24.Qa4? (better 24.Qb6 Rb6 25.dc4–+) 24...Qb1 25.Bf6 Qb2 (better 25...Qa2 26.Bg4 gf6 27.Qc4 Qc4 28.dc4 Rb3–+) 26.Bb2+– (26.Bb2 Rb2 27.dc4 Re2 28.Qd1 Bh2 29.Kh2+–) 1–0. vknyus – leetpro, gameknot.com, 2011.

9.bc5 Na4 10.Qd2 bc4=.

9.bc5 dc5 10.cb5 Na4 11.Ba1 ab5 12.e4 e6 13.Nf3 Nf6 14.Bf6 Qf6 15.Be2 (better 15.Na5 Ba6 16.Nc4=+) 15...Bd6?? (15...Qb2!?–/+) 16.e5 (better 16.d4!? Qg6 17.Bb5 Bc6 18.Qe2+–) 16...Be5= 17.Ne5 Qe5 18.0–0?? (better 18.d4 Qe4 19.Nc5 Nc5 20.dc5–/+) 18...Nc3–+ 19.Rc3 Qc3 20.d4 c4 21.Nc5 Bd5 22.a4 ba4 (22...b4 23.a5–+) 23.Na4 (23.Qa4 Kf8 24.Qd7 Ra8–+) 23...Qb3 24.Qb3 (24.Nc5 Qd1 25.Rd1 Ke7–+) 24...cb3 25.Bb5 (25.Nc5 Ke7–+) 25...Bc6 (better 25...Ke7–+) 26.Nb6 (26.Rc1 Kd7 27.Nb6 Kd6 28.Nc8 Rc8–+) 26...Rc7 (better 26...Bb5 27.Nc8 Bf1 28.Nd6 Ke7–+) 27.Rc1?? (27.Na8 Kd7 28.Nc7 Kc7 29.Bd3–+) 27...b2 28.Bc6 Rc6! 29.Rf1 (29.Rc6 b1Q Mate attack) 29...Rc1 30.g3 Rf1 31.Kf1 b1Q 32.Kg2 Qb6 33.h4 0–0 34.Kh3 Qd4 35.f4 (35.Kg2 Qe4 36.f3 Qc2 37.Kh3 Qf5 38.g4 Qf3 39.Kh2 Qf2 40.Kh3 Rd8 41.g5 Rd3 42.Kg4 Qf3) 35...h5 36.Kg2 Ra8 37.Kh3 (37.Kh2 Qf2 38.Kh3 Qf1 39.Kh2 Ra2) 37...Ra3 (37...Qg1 38.g4 hg4) 38.Kh2 (38.Kg2 Qe4 39.Kf1 Ra2 40.g4 Qb1) 38...Qd3 (38...Qf2 39.Kh3 Qg3) 39.g4 (39.Kg1 Ra2 40.g4 Qd1) 39...Qd2 40.Kg1 Ra1 0–1. vknyus – ibeckstrm, gameknot.com, 2011.

9.Nd2 e6 10.g3?? (better is 10.Ngf3=) 10...Bh1–+ 11.f3 Nf6 (11...Ne7 12.Nh3 Nf5 13.Nf2–+) 12.Bf6 Qf6 (12...gf6 13.Nh3 bc4 14.dc4–+) 13.Kf2 (13.bc5 dc5 14.Nh3 Bd6–+) 13...bc4 (13...cb4 14.ab4 d5 15.c5–+) 14.Nc4 Nc4 15.Rc4 d5 16.Rf4 (16.Qa4 Kd8 17.Rc2 Bd6–+) 16...Qb2 (better is 16...Qc3 17.Qa4 Ke7 18.Nh3 cb4 19.Rb4–+) 17.Nh3 (17.Qa4 Ke7 18.Qa6–+) 17...Bd6 18.Rh4 (18.Qa4 Ke7 19.Qa6 Bf4 20.Nf4 g5–+) 18...cb4 19.ab4 (19.Qa4 Ke7 20.ab4–+) 19...Bb4 (better is 19...0–0 20.d4 Be7 21.Kg1–+) 20.Kg1?? (20.Qa4 Ke7 21.Rb4+=) 20...Bf3 (20...0–0 21.Rb4 Qb4 22.Kh1–+) 21.ef3?? (21.Qa4!? Kd8 22.Rb4+=) 21...Rc2 (better is 21...0–0 22.Rg4–+) 22.Nf4?? (better is 22.Rb4 Qb4 23.Qc2–+) 22...g5–+ 23.Rh6 (23.Nd5 gh4 24.Nb4 Qd4 25.Kh1–+) 23...gf4 24.g4 Bc5 25.Kh1 Qd4 26.Be2 Re2! 27.Qe2 Qg1 0–1. rookie47 – stealthlock, gameknot.com, 2011.

9.e3 Na4 10.Ba1=.

9.e3 cb4 10.ab4 bc4 11.dc4 Nc4?? 12.Bc4 Bg2 13.Nd4?? (better 13.Qg4 Bb7 14.Bg7+–) 13...Bh1?? (better 13...Nf6 14.Qc2 e5–/+) 14.f3 (better 14.Qa4 Qd7 15.Bf7 Kf7 16.Qd7 Rc1 17.Bc1+–) 14...a5?? (better 14...Nf6 15.Qa4 Nd7–+) 15.Bb5 Qd7 (15...Rc6 16.Bc6 Qd7 17.Bd7 Kd7 18.Qa4 Kd8 19.Qa5 Kd7 20.Qc7 Ke8 21.Qc8) 16.Bd7 (16.Rc8) 16...Kd7 17.Qa4 Kd8 18.Qa5 (18.Rc8 Kc8 19.Qc6 Kb8 20.Nb5 ab4 21.Qc7 Ka8 22.Qc8) 18...Kd7 19.Qb5 Kd8 20.Nc6 (20.Qb6 Kd7 21.Qb7 Rc7 22.Qc7 Ke8 23.Qc8) 20...Kc7 (20...Rc6 21.Rc6 e5 22.Qb7 Ne7 23.Rd6 Ke8 24.Qd7) 21.Na7 Kd8 22.Rc8 1–0. ibeckstrm – vknyus, gameknot.com, 2011.

9.e3 cb4 10.ab4+= bc4 11.dc4 Nc4?? (better is 11...Na4 12.Bd4 Bc6+/–) 12.Bd4?? (better is 12.Bc4 e6 13.Bf1 Rc1 14.Bc1+–) 12...Nb6 (12...d5 13.Nc5 Qb6 14.Bc4 dc4 15.Nf3 Bf3 A) worse is 16.gf3 Qb4 17.Kf1 Qb5+= (17...Rc5? 18.Rb1 Qb1 19.Qb1+–); B) 16.Qf3 Qb4 17.Ke2+=) 13.Nf3 (13.Na5 Rc1 14.Qc1 Ba8 15.Bb6 Qb6 16.Qc8 Qd8 17.Qa6 f5+–) 13...Rc1 14.Nc1 (14.Qc1 e5 15.Bc3=) 14...Nd5 (14...e5 15.Bb2–/+) 15.Qa4 White prepares b5. Attacks the isolani on a6 (better is 15.Ba6!? Bc6 16.b5+=) 15...Qd7+= 16.b5 (16.Qd7 Kd7 17.b5 ab5 18.Bb5 Kc7+=) 16...e5 17.Be5 (better is 17.Bb2 Nc7 18.Na2–/+) 17...Nb6?? (better is 17...de5 18.Ne5 Bb4 19.Qb4 Nb4 20.Nd7 Kd7 21.ba6 Na6–+) 18.Qb4?? (better is 18.Qa5 de5 19.ba6 Bf3 20.gf3=) 18...de5–+ 19.Qb3 (19.Qb2 a5 20.Qe5 Be7–+) 19...Bd5 (better is 19...Qc7 20.Na2 Bd5 21.Qb2 Ba2 22.Qa2 Bb4 23.Ke2–+) 20.Ne5 (20.Qb2 a5 21.Qe5 Qe6 22.Nd3 Qe5 23.Nde5 Bb4 24.Kd1–+) 20...Bb3 21.Nd7 Bb4 22.Ke2 Bc4 23.Nd3 (23.Kf3 Kd7 24.Bc4 Nc4 25.Rd1 Bd6 26.ba6 Nf6–+) 23...Bd3 (better is 23...Nd7 24.Kd1 Bd6 25.ba6 Ba6 26.Nf4–+) 24.Kd3 Nd7 (24...Kd7 25.ba6 Nf6 26.Be2–+) 25.ba6 Ngf6 26.Kc4 (26.g3 Ke7 27.Bg2 Bc5–+) 26...Bd6 27.Be2 Ke7 28.Ra1 (28.Bf3 Rc8 29.Kb5 Rc5 30.Ka4 Nb6 31.Kb3 Ra5–+) 28...Ne5 (better is 28...Rc8 29.Kb3 Nc5 30.Ka2 Nd5–+) 29.Kb5 (29.Kb3 Rb8 30.Kc2 Rc8 31.Kd1 Nd5–+) 29...Nfd7 (better is 29...Rb8 30.Ka4 Rb4 31.Ka3 Nd5–+) 30.a7 Ra8 31.f4 Bb8! 32.ab8Q (32.ab8Q Ra1 Pinning (32...Ra1 Deflection); 32.ab8R Ra1 Pinning (32...Ra1 Deflection); 32.ab8B Ra1 Pinning (32...Ra1 Deflection); 32.ab8N Ra1 Pinning (32...Ra1 Deflection)) 32...Rb8 33.Ka4 Ra8 (33...Ra8 34.Kb4 Ra1 35.fe5 Ne5–+) 0–1. stealthlock – lanre1, gameknot.com, 2011.

9.e3 e5 10.Nf3 Nf6 11.g3 (11.Be2 cb4 12.ab4 e4 13.de4 Nc4 14.Bc4 Rc4 15.Rc4 bc4=) 11...Be7 12.Bg2 (12.Bh3 Na4 13.Ba1 Rc7=) 12...e4 (better is 12...cb4!? 13.ab4 bc4–/+) 13.Ng5+/– d5 14.cd5 (better is 14.Na5 Ba8 15.cb5 cb4 16.Nc6 Bc6 17.bc6=) 14...Bd5? (14...cb4 15.Ne4 ba3 16.Bf6 Bf6 17.Rc8 Bc8 18.Qc1=) 15.bc5?? (better is 15.de4 Bc6 16.Nc5+/–) 15...Bb3?? (15...ed3 16.Bf6 gf6 17.Bd5 A) worse is 17...Nd5 18.Nf3+/–; B) 17...fg5? 18.Bb7+– (18.cb6?! Rc1 19.Qc1 Qd5 20.Qc8 Bd8+=); C) 17...Qd5=) 16.Qb3+– Qd5 17.Qd5 Nbd5 18.Ne4 0–0 19.d4 Rfe8 (19...Ne4 20.Be4 Rfd8 21.Bd3+–) 20.Nf6 Nf6 21.Bb7 Rb8 22.Ba6 Nd5 23.a4! ba4 24.Rc2?? (better is 24.Ba3+–) 24...Nb4+= 25.Kd2 Na6 26.Ra1 Red8 27.Ra4 (27.c6 Rdc8 28.Ra4 Nb4=) 27...Nc5 28.Rac4 (28.Ra7 Ne4 29.Kd3 Re8–/+) 28...Ne4 29.Kd3 f5 30.Rc7 (30.f3 Ng5 31.Ke2 Bf6–/+) 30...Kf8 31.f3 Rb3 32.Kc4 Rb4 33.Kd3 Ng5 34.Ke2 Rb3 35.Ra7 Rdb8 36.Bc1 R8b7 37.Raa2 Ne6 38.Ra1 Kf7 39.Ra6 Bg5 40.f4 Be7 41.h4 h6 (41...Nc7 42.Raa2–+) 42.h5 Nc7 43.Rac6 (43.Ra5 Nb5–+) 43...Nd5 44.Kf3 (44.Rc8 Ba3 45.Bd2 Re7–+) 44...Rd3 (44...Nb4!? 45.g4 Nc6 46.Rc6–+) 45.Re2 Rb1 46.Bd2 (46.Rc8 Rd1 47.Bd2 Nf6–+) 46...Rd1 (46...Rbb3 47.Kf2–+) 47.Rc2 Bf6 (47...Rh1 48.Rb2–+) 48.Kf2 Rh1 (better is 48...Bd8–+) 49.Ba5? (better is 49.Kg2 Rh5 50.Rc5–+) 49...Rh5 (49...Rh2 50.Kf3 Re3 51.Re3 Rc2 52.Rd3–+) 50.Rc5 Rh2 (better is 50...Ke6!? 51.Bd2–+) 51.Kf3 Re2 52.Ke2 Re3 53.Kd2 Rg3 54.Rd5 Kg6 (better is 54...Ke6 55.Rb5 Bd4–+) 55.Rd6–/+ Rf3 (better is 55...h5 56.Bd8 h4 57.Bf6 gf6–/+) 56.Rc6? (better is 56.Bc7!?+=) 56...Rf4–+ 57.Kd3?? (better is 57.Bc3–+) 57...Rd4 58.Ke2 Ra4 59.Ra6 (59.Bc7–+) 59...Kh5 60.Kd3 (60.Ra7 Bd8! 61.Bb6 Re4 62.Kf3 Bb6 63.Rg7 Be3–+) 60...g5 0–1. stealthlock – leetpro, gameknot.com, 2011.

9.e3 e6 10.Nf3 Nf6 11.bc5 dc5 12.Na5 Ba8+=.

9.e3 e6 10.Nf3 Nf6 11.Be2 g6 (11...Na4 12.Bf6 Qf6 13.Na5+=) 12.Rc2 (12.Na5 Ba8+=) 12...Bg7 13.Qa1 (13.bc5!? Na4 14.cb5 Nb2 15.Rb2 dc5 16.ba6 Ba6 17.d4 Be2 18.Qe2 (worse is 18.Ke2 Nd5 19.Rc2 cd4 20.Nbd4 Nc3 21.Rc3 Rc3–/+) 18...cd4 19.Qb5 Nd7 20.Nfd4+=) 13...0–0 14.0–0 (better is 14.bc5 Na4 15.d4+=) 14...e5?? (better is 14...bc4!? 15.dc4 Na4–/+) 15.Rd1 (15.bc5 Na4 16.cd6 e4+=) 15...Re8 Black plans e4 (15...Na4 16.bc5 Nb2 17.Qb2 (17.Rb2 e4 18.Ne1 ed3 19.Bd3 Ng4–/+) 17...dc5 18.cb5+= (worse is 18.Ne5 Nd7 19.d4 cd4 20.ed4 Ne5 21.de5 Qg5+=)) 16.h3 (16.bc5 Na4+=) 16...e4 (better is 16...bc4 17.dc4 Ne4=) 17.Nh2?? (17.de4 A) worse is 17...Nc4 18.Bc4 bc4 19.Nc5 Be4 20.Ne4 (20.Rc4?! Bf3 21.gf3 Qe7+=) 20...Re4 21.Nd2+–; B) worse is 17...Be4 18.Rcd2 Bf3 19.gf3+=; C) 17...cb4 18.e5 Nfd7=) 17...bc4?? (better is 17...cb4 18.Na5 Bd5 19.ab4 ed3 20.Bd3 A) 20...Nc4 21.Bc4 bc4 22.Ng4 Ng4 23.Bg7 Bg2 24.Kg2 (24.hg4 Be4 25.Rc4 Qh4–+) 24...Ne3 25.fe3 Qg5 26.Kh2 Re3 27.Qf6–/+ (27.Rc4?? Re2 28.Kh1 Qg2); B) 20...bc4–/+) 18.dc4+= Na4 19.Nc5 dc5?? (better is 19...Nc5 20.bc5 Rc5+=) 20.Rd8+– Rcd8 21.Bf6 Bf6 22.Qf6 Re6 (22...h5+–) 23.Qd8 (23.Qd8 Kg7 24.Qa5+–) 1–0. ibeckstrm – stealthlock, gameknot.com, 2011.

9.e3 e6 10.Nf3 Nf6 11.g3 Rc7 (11...Na4 12.Ba1=) 12.Bg2 Be7 13.Qc2 (13.Na5 Ba8=) 13...h6 (better is 13...bc4!? 14.Na5 cd3 15.Qd3 Bd5+=) 14.0–0+= 0–0 15.Na5 (15.bc5!? dc5 16.Na5+/–) 15...Ba8= 16.Rfe1 Re8 17.d4 (better is 17.Nd2=) 17...cb4–/+ 18.ab4 Nbd5 (better is 18...bc4 19.Nd2 Bg2 20.Kg2 Qd7–+) 19.Qb3= Nb6 20.c5 dc5 (20...Bd5!? 21.Qc2 Qa8=) 21.dc5+/– (worse is 21.bc5 Bd5 22.Qc2 Be4=) 21...Nc8? (better is 21...Bd5 22.Qa3 Na4+=) 22.Be5 (22.Rcd1 Rd7+–) 22...Rd7 23.Ng5?? White intends c6 (23.c6 Rd5+–) 23...Na7?? (better is 23...Bg2 24.Ne6 Bd5 (24...fe6?! 25.Kg2 Rd2 26.e4+=) 25.Nd8 Bb3–+) 24.c6 (better is 24.Ne6 fe6 25.Ba8 (25.Qe6?! Kh7 26.Ba8 Bc5 27.Bf6 Re6 28.Bd8 Rd8 29.Rc5 Ra8+–) 25...Qa8 26.Qe6 Kh7 27.Bf6+–) 24...Rd3+/– 25.c7?? (better is 25.Qb1 hg5 26.Nb7 Bb7 27.cb7+/–) 25...Qd7–+ 26.Qc2 (26.Rc3 Rc3 27.Qc3 hg5 28.Bf6 Bf6–+) 26...Bg2 27.Kg2 (27.Bf6 A) 27...gf6 28.Red1 hg5 29.Rd3+= (29.Qd3? Qd3 30.Rd3 Bf3–+); B) 27...Bf6 28.Kg2 hg5–+) 27...hg5 28.Bd4? (28.Bf6 gf6 29.Red1 Rd1 30.Rd1 Bd6–+) 28...Qd5 (28...Rd4 29.ed4 Nd5 30.Nb7–+) 29.f3?! (29.Kf1 Rd4 30.ed4–+) 29...Rd4 30.ed4 Bb4 31.Re5 (31.Nc6 Nc6 32.Qc6 Qc6 33.Rc6 Be1 34.c8R Rc8 35.Rc8 Kh7 36.Kf1–+) 31...Qd4 32.Nc6 Nc6 33.Qc6 Qe5 34.c8Q (34.Qe8 Ne8 35.c8Q Qe2 36.Kg1 Kf8–+) 34...Rc8 35.Qc8 Kh7 36.Rc2 (36.Qc2 g6 37.Qd3–+) 36...Nd5 37.Ra2 (37.h3–+) 37...Qe1 38.Qd7 Ne3 39.Kh3 Qf1 40.Rg2 Qg2 0–1. stealthlock – ibeckstrm, gameknot.com, 2011.

9.e3 e6 10.Nf3 h6 11.g3 (11.Na5 Bf3 12.Qf3 Na4=) 11...Be7? (better is 11...Nf6!?=) 12.Bg7+/– Rh7 13.Bb2 Bf6 14.Qc2?? (14.Bf6 Qf6 15.Be2 cb4 16.ab4 Na4+–) 14...Bg7 (better is 14...Bf3 15.Rg1 Bb2 16.Qb2 Nf6–+) 15.Bg2 Nf6? (15...cb4!? 16.ab4 Bb2 17.Qb2 bc4+/–) 16.0–0 Ng4 (16...cb4 17.ab4 bc4 18.Na5 cd3 19.Qd3+–) 17.d4 (better is 17.Bg7 Rg7 18.bc5 Bf3 19.Bf3 (19.cb6?! Bg2 20.Kg2 Qb6+–) 19...dc5 20.cb5 ab5 21.Qb2+–) 17...Nc4?? (better is 17...f5 18.bc5 Nc4 19.cd6 Qd6+–) 18.Qh7 Bf8 19.Ba1 Qf6 (19...Nf6 20.Qd3 cb4 21.ab4+–) 20.Nfd2 (better is 20.dc5 Qf5 21.Qf5 ef5+–) 20...Bg2 21.Kg2 (better is 21.dc5 Qg6 22.Qg6 fg6 23.Kg2+–) 21...Bg7 (21...cb4 22.Qe4 Nh2+–) 22.Nc4 bc4 23.dc5 e5 (23...Qf5 24.Qf5 (24.Bg7 Qh7 25.Na5 Qg7 26.Nc4 d5 27.Nd6 Kd7–+; worse is 24.Qg7 cb3 25.Rcd1 Qe4 26.Kg1 d5+–) 24...ef5 25.Bg7 cb3 26.cd6 Rc1 27.Rc1+–) 24.Rc4 (better is 24.cd6 Kf8 25.Qe4+–) 24...d5 (24...Qe6 25.Rcc1 Bf8 26.cd6 Rc1 27.Rc1 Bd6+–) 25.Rg4 Bf8 26.Rf4! Qe6 (26...ef4 27.Bf6 Pinning (27.Bf6 Deflection)) 27.Be5! Qe5 28.Qf7 Kd8 29.Qf8 Kc7 30.Rf7 Kb8 31.Qh6 Qe4 32.Kg1 d4 33.Qb6 1–0. stealthlock – juhakurimo, gameknot.com, 2011.

9.e3 Nf6 10.Nf3 Na4 11.Ba1 e6 12.cb5 (12.Na5!? Bf3 13.gf3 cb4 14.ab4–/+) 12...ab5+= 13.d4 (13.Be2!?+=) 13...c4–/+ 14.Na5 Ba8?? (better is 14...Bf3 15.Qf3 d5–/+) 15.Nc4! bc4 (15...bc4 16.Qa4 Deflection (16.Qa4 Overloading); 15...Rc4 16.Bc4 Combination) 16.Qa4 Bc6 17.b5 Bd7 (better is 17...Bd5 18.Nd2 Ra8+/–) 18.Bc4?? (better is 18.Rc4 Rb8 19.Rc2+/–) 18...d5–/+ 19.Ne5 (19.0–0 dc4 (19...Rc4?! 20.Rc4 dc4 21.Ne5+=) 20.Ne5 Ra8 21.Qc4 Ba3–/+) 19...dc4 (19...Ra8!? 20.Qc2 dc4 21.Rb1–+) 20.Nc4 Be7 21.0–0 0–0 (21...Rb8!? 22.Rb1 0–0–/+) 22.Qb3+= Ne4 23.Rfd1 Nd6 24.Ne5? (24.Nd6!? Bd6 25.Rc8 Bc8 26.d5+=) 24...Rc1 (24...Bb5 25.a4 Be2 26.Re1–+) 25.Rc1–/+ Bb5 26.Rc5 (26.a4!? Be8 27.Bc3–/+) 26...Qa5–+ 27.Bc3 Ba4?? (27...Qa6!? 28.f3–+) 28.Ra5 (better is 28.Nc6 Bh4 29.Na5 (worse is 29.Ba5 Bb3 30.g3 Bf6–/+) 29...Bb3 30.Nb3=) 28...Bb3–/+ 29.Ra7 Re8 (29...Bf6 30.Rc7–+) 30.Bb4–/+ Rc8 31.h4 Bf8 32.Bd6? (better is 32.Rd7!? f6 33.Bd6 Bd6 34.Rd6 fe5 35.de5+=) 32...Bd6–+ 33.Nf7?? (better is 33.Ra6 Bc7 34.a4–+) 33...Bf8 (33...Rc1) 34.Kh2 h6 (34...Rc2 35.Kg3–/+) 35.Ne5 Bd5 (35...Rc2 36.Kg3 Ra2 37.Ra8 Ra3 38.Rb8–/+) 36.Nd7 Ra8 (36...Bd6!? 37.Ne5 Ra8–/+) 37.Ra8= Ba8 38.Nf8 Kf8 39.g4 Kf7 40.Kg3 Kf6 41.f4 White prepares the advance g5 41...g6 42.Kf2 Bc6 43.Ke2 (43.Kg3 h5–/+) 43...h5 44.g5? (better is 44.gh5 gh5 45.Kd3–/+) 44...Kf5–+ 45.Kd3 Kg4 46.Kc4 (46.e4–+) 46...Kh4 47.Kc5 (47.f5 ef5 48.Kc5 Ba8–+) 47...Bd5 48.a4 (48.f5 Kg5 49.e4 h4–+) 48...Kg4 49.e4 Be4 (49...Be4 50.Kd6 Kf5–+) 0–1. stealthlock – ladyofknight, gameknot.com, 2011.

9.e3 Nf6 10.Bf6 ef6 11.Nf3 Be7 12.g3 (12.Be2 0–0=) 12...bc4+= 13.dc4 0–0 14.Bg2 (14.Be2 d5+=) 14...Be4 (14...cb4!? 15.Na5 Bf3 16.Bf3 ba3+=) 15.0–0+= cb4 16.ab4 Nc4 17.Nbd2 Nd2 18.Qd2 Rc1 19.Rc1 Qa8 20.Ne1 d5 21.Be4 de4 22.g4? (better is 22.Rc7!? Bd8 23.Rd7+=) 22...Rc8 23.Ra1 Qc6 24.Qd4 (24.Qe2 Qb5 25.Kf1 Bb4 26.Ra6–+) 24...Rd8 25.Qa7 (25.Qb2 Qc8 26.h3 f5–+) 25...Bb4 26.Kg2 a5 27.Ra2 (27.h3–+) 27...Be1 28.Ra5 (28.Qe7 Rc8 29.Ra1 Bb4–+) 28...Ba5 29.Qa5 Qd6 30.h3 (30.h4 g6 31.Qe1 Kg7–+) 30...Qd1 31.h4 (31.Qf5 Qd5 32.Qd5 Rd5 33.f3–+) 31...Qf3 32.Kh2 Qf2 33.Kh3 Qe3 34.Kg2 Qe2 35.Kg3 Rd3 36.Kf4 Qf3 0–1. stealthlock – kevinkjt2000, gameknot.com, 2011.

9.e3 Nf6 10.Bf6 gf6 11.Nf3 (11.bc5 dc5 12.cb5 Nd7 13.ba6 Ba6+=) 11...Bg7 (11...Na4=) 12.g3 (better is 12.bc5!? dc5 13.cb5 ab5 14.Nc5+/–) 12...cb4 (12...f5 13.bc5 Na4 14.Be2 dc5 15.0–0+=) 13.ab4+= f5 14.Bg2 bc4 15.Na5 Bd5 (15...Qd7 16.dc4 Be4 17.0–0+=) 16.dc4= Bc4 17.Nd4 Bd5 18.Nac6 Bc6? (18...Qd7 19.Bd5 Nd5 20.0–0=) 19.Nc6 (better is 19.Bc6!? Kf8 20.Nf5+/–) 19...Qc7 20.0–0 e6 21.Re1 (21.Qe2 d5=) 21...Qd7 (21...d5 22.Bf1 Qb7 23.Na5 Rc1 24.Qc1=) 22.Re2 d5 23.Rec2 0–0 24.Bf1 Rc7? (better is 24...Ra8=) 25.Ne7! Qe7 26.Rc7 Qf6? (better is 26...Qb4!? 27.Rb7 Qa5+/–) 27.Ba6 Na4?? (27...Qb2 28.Rb7 Na4+–) 28.Qa4 Qb2 (28...d4 29.ed4 Qd4 30.Rd7+–) 29.f4 White intends b5 (better is 29.b5!? Bh6+–) 29...Qd2 30.b5 (better is 30.Qb3 d4 31.ed4 Bd4 32.Kh1+–) 30...Qe3= 31.Kg2 Qe2 32.Kg1 d4?? (better is 32...Qe3 33.Kf1 Qf3 34.Ke1 Qe3 35.Kd1 Qd3 36.Ke1 Qe3 37.Kf1 Qf3 38.Kg1 Qe3=) 33.b6 (33.Qc2 Qe3 34.Qf2 Qd3+–) 33...d3 34.b7 (better is 34.Qc6 Bd4 35.Kh1 Bb6 36.Bd3+– (worse is 36.Qb6 Qf3 37.Kg1 d2+–)) 34...Qe3= 35.Kg2 Bd4?? (better is 35...Qe2! 36.Kh3 Qg4 37.Kg2 Qe2 38.Kh1 Qf3 39.Kg1 Qe3 40.Kg2 Qe2=) 36.Kh3+– d2 37.Rb1 h5 (37...Ba7+–) 38.Rb3 (better is 38.Rc8 Ba7 39.Qb4+–) 38...d1Q–+ 39.Re3 Qa4 40.Rd3 (40.Rc8 Ba7 41.Bc4–+) 40...Bf6 (better is 40...Qa6 41.Rd4 Qf1 42.Kh4 Qf2–+) 41.Rc8 (41.Rd6 Qa3 42.Rb6 Qe3+/–) 41...Qa6 42.Rf8 Kf8?? (better is 42...Kg7 43.Rg8 Kh7–+) 43.b8Q+/– Kg7 44.Qb3 Kg6 45.Rd7?? (better is 45.Qd1+/–) 45...Qf1 0–1. stealthlock – rookie47, gameknot.com, 2011.

9.e4 e5 (9...e6 10.Qe2=) 10.Nf3 (10.cb5!? ab5 11.bc5+=) 10...cb4= 11.ab4 bc4 12.dc4 Be4 13.c5 dc5 (13...Na4 14.Ba1 dc5 15.Ba6 Qd1 16.Kd1 Bf3 17.gf3+=) 14.Ba6 (better 14.Qd8!? Rd8 15.bc5 Bf3 16.gf3+=) 14...Qd1–/+ 15.Rd1 Bf3 (better 15...c4 16.Bc8 cb3–/+) 16.Bc8?? (better 16.gf3 c4 17.Nc5+=) 16...Bd1–+ (16...Nc8 17.gf3 cb4 18.Be5+=) 17.bc5 Bb3 18.cb6 Bd6 19.0–0 Ne7 20.b7 0–0 (better 20...Bb8–+) 21.Bg4?? (better 21.Ba3 Nc8 22.bc8Q Rc8 23.Bd6–/+) 21...Rb8–+ 22.Bf3 f5 23.Ra1 (23.Rb1 e4 24.Ba3 Ba3 25.Rb3 ef3 26.Ra3 Rb7 27.gf3 Nd5–+) 23...e4 24.Ra8 ef3 25.Bd4 (25.Ba3 Be5 26.Be7–+) 25...Nc6 26.gf3 (26.Be3–+) 26…Nd4 0–1. leetpro – vknyus, gameknot.com, 2011.

9.Nf3 Na4!? 10.Ba1 Nf6=.

9.Nf3 bc4 10.Na5 Bf3 11.ef3 cb4 12.ab4 cd3 13.Bd3 Rc1 14.Qc1 Qa8 (14...Nd7!?+=) 15.b5+– Nf6 16.ba6 Nfd7 17.Bb5 e6? (better 17...Qd5 18.a7 Qe6 19.Qe3 Qe3 20.fe3 Kd8+–) 18.Qc7 Be7 (18...Qd8 19.Qb7 Be7+–) 19.Qb6 Qd8 20.Bd7 Qd7 21.Bg7 Rg8 (21...Bd8 22.a7 Bb6 23.a8Q Qd8 24.Qc6 Ke7+–) 22.a7 Qc8 (22...f5 23.a8Q Kf7+–) 23.Qb5 Kd8 24.0–0 Rg7 25.Nb7 Qb7 26.Qb7 Bh4 (26...Rg2 27.Kg2 Ke8 28.a8Q Bd8 29.Qc7 Kf8 30.Qcd8 Kg7 31.Qg5) 27.a8Q 1–0. kevinkjt2000 (1625) – vknyus, gameknot.com, 2011.

9.Nf3 e5 10.bc5+/– bc4? (better is 10...Na4!? 11.Qd2 Nf6+=) 11.cb6 cb3 12.Qb3 Rc1 13.Bc1 Ne7 14.Ng5 (14.e4!? Qd7+–) 14...Nd5+/– 15.e4 h6? (better is 15...Be7 16.ed5 Bg5 17.Bg5 Qg5+/–) 16.Nf7+– Kf7 17.ed5 Qa8 18.f3 (better is 18.d4 Qe8 19.Be2 ed4 20.Qf3 Kg8 21.Bb2+–) 18...Bd5 19.Qa4 Be7 20.Be3 Bh4?? (better is 20...Qb7 21.Be2 Bg5+/–) 21.Qh4+– Qc6 22.Be2 Qc3 (22...Qb5 23.0–0 Qb2 24.Qf2+–) 23.Bd2 (better is 23.Kf2 Qb3 24.Rc1 Rf8+–) 23...Qa1 24.Bd1 Qa3 25.0–0 (25.Qa4!? Qa4 26.Ba4 Rb8+–) 25...Qd3 26.Qf2 Bc4 (26...Rc8+–) 27.f4 (27.Re1 Bd5+–) 27...e4?? (27...Qf1!? 28.Qf1 Bf1 29.Kf1 Rb8+/–) 28.Bg4 (better is 28.Re1 Rb8 29.f5+–) 28...h5 29.Bf5 (29.Bd7 Qf1 30.Qf1 Bf1 31.Kf1 Ke7+–) 29...g6? (29...Qf1 30.Qf1 Bf1 31.Kf1 Rb8+–) 30.Bd7+– Rd8? (30...Qf1 31.Qf1 Bf1 32.Kf1+–) 31.b7 Ke7?? (31...Rb8 32.Bc6 Bb5+–) 32.Bc8 Qb3 33.Qa7 Bf1 34.b8Q Qb7 35.Qbb7 Ke8 36.Qe7 1–0. stealthlock – vknyus, gameknot.com, 2011.

9.Nf3 e6 10.e4 Nf6 11.bc5 dc5 12.Be2 bc4 13.Na5 cd3 14.Nb7 de2? (better is 14...Qc7 15.Qd3 c4=) 15.Qd8+– Rd8 16.Nd8 Kd8 17.Ne5 Kc8? (better is 17...Ke8 18.Nc4 Nc4 19.Rc4 Kd7+–) 18.Nf7 Rg8 19.Ng5 h6 (19...Kd7 20.Ke2 h6 21.Rhd1 Ke7 22.Bf6 gf6 23.Nh7+–) 20.Ne6 Ne4 21.f3 Nf6 (21...Nd6 22.Nf8 Rf8 23.Rc5 Kd7 24.Bg7+–) 22.Bf6 gf6 23.Nf8 Rf8 24.Rc5 Kb7 25.Ke2 Re8 26.Kf2 1–0. kevinkjt2000 (1635) – stealthlock, gameknot.com, 2011.

9.Nf3 Bf3 10.ef3 Na4!? 11.Ba1 e6+=.

9.Nf3 Bf3 10.ef3 e5 11.Be2 g6 12.f4 (12.bc5 Na4 13.Ba1 Bh6+/–) 12...Bh6 13.g3 ef4?? (better is 13...Nf6 14.fe5 Bc1 15.Qc1 de5 16.Nc5 0–0+=) 14.Bh8+– fg3 15.hg3 Bc1 16.Qc1 (worse is 16.Nc1 Nf6 17.Qd2 Qe7+–) 16...h5 17.Qe3 (better is 17.0–0 f6 18.bc5 dc5 19.Re1+–) 17...Kd7 (17...Qe7+–) 18.bc5 dc5 (18...Na4 19.cd6 bc4 20.dc4+–) 19.Nc5 Kc6 (19...Rc5 20.Qc5 Ke8+–) 20.Bf3 1–0. leetpro – stealthlock, gameknot.com, 2011.

9.Nf3 Bf3 10.ef3 e6 11.d4 cd4?? (11...Nc4 12.Bc4 bc4 13.Na5+=) 12.Bd4?? (better is 12.cb5 Rc1 13.Qc1 ab5 14.Bb5 Nd7 15.Nd4+–) 12...Nc4+= 13.Bc4 bc4 14.Na5 d5 15.Qa4 (15.Nb7 Qd7 16.Nc5 Qc6–/+) 15...Qd7 16.Qd7 Kd7 17.Nb7 Be7?? (better is 17...Nh6–+) 18.Bg7+= Bf6 19.Bh8 Bh8 20.Nc5 Kd6 21.Na6 Bb2 22.Rb1 Ba3 23.b5 Ne7? (better is 23...c3 24.b6 c2+–) 24.b6 Nc6 25.b7 Rg8 26.Rb6 Bc5 (26...Kd7 27.Rc6 Kc6 28.b8Q Rb8 29.Nb8 Kc7 30.Na6 Kb6 31.Kd2+–) 27.b8Q Rb8 28.Rb8 (better is 28.Rc6!? Kc6 29.Nb8 Kd6+–) 28...Nb8 29.Nb8 Ba7 1–0. ladyofknight – stealthlock, gameknot.com, 2011.

9.Nf3 Bf3 10.ef3 e6 11.Be2 Nf6 12.0–0 g6 (12...Be7 13.Bf6 Bf6 14.bc5 dc5 15.cb5 ab5 16.Rc5 Rc5 17.Nc5=) 13.d4 (better is 13.Qd2+/–) 13...cd4?? (better is 13...Nc4 14.Bc4 bc4=) 14.cb5+– Rc1 15.Qc1 (15.Nc1?! e5+–) 15...Bg7 (15...ab5 16.Bb5 Nbd7 17.Nd4+–) 16.Qc6 (16.Bd4?! ab5 17.Qc6 Nbd7 18.Qd6 Qe7 19.Qe7 Ke7 20.Bb5 Rg8+–; 16.Nd4?! ab5 17.Bb5 Nbd7+–) 16...Nfd7 17.Bd4 (better is 17.ba6 0–0 18.Bd4 Bd4 19.Nd4 d5+–) 17...Bd4 18.Nd4 Qe7? (18...e5 19.Nb3 ab5+–) 19.ba6 0–0 20.Nb5 Rc8 (20...d5 21.a7+–) 21.Qb7 (21.Qd6 Qd6 22.Nd6 Rc2+–) 21...Rc2 22.Bd3 Rd2 23.Bb1 Qf8 24.a7 Na8 (24...d5+–) 25.Nc7 (better is 25.Qd7 d5+–) 25...Ndb6 26.Qb8 (26.Na8 Na8 27.Rc1 Kg7+–) 26...d5 (26...Nc7 27.Qc7 Na8 28.Qc3+–) 27.Rc1 Kg7 28.Ne8 (better is 28.g3 d4+–) 28...Kg8 29.Nf6 Kg7 30.Nh7! Qe7 (30...Kh7 31.Qf8 Deflection (31.Qf8 Overloading)) 31.Kf1?? (better is 31.a4 Kh7 32.a5+–) 31...Kh7+= 32.Ke1 (32.Kg1+=) 32...Rd4?? (32...Rb2 33.Kf1 Rb3 34.h4 Ra3 35.h5=) 33.Rc6?? (33.f4 Qf6 34.Qe5 Qf4 35.Qf4 Rf4 36.Ke2+=) 33...Rc4?? (33...Qg5 34.g3 Nc4 35.Rc4 Rc4 36.Bg6 Qg6–+) 34.Bg6?? (34.Rc4 dc4 35.Be4+–) 34...Kg6 (34...fg6?! 35.Rc4 (35.Rb6?? Nb6 36.Ke2 Qf6–+) 35...dc4 36.h4–+) 35.Rb6?? (better is 35.g3–/+) 35...Nb6–+ 36.Qb6 (36.g4 Rc1 37.Ke2–+) 36...Rc1 (36...Qf6 37.Qe3 Qa1 38.Ke2 Rc2 39.Qd2 Rd2 40.Kd2 Qa3 41.Ke1–+) 37.Ke2?? (37.Kd2 Rc8 38.Qb8 Qg5 39.f4–+) 37...Qf6–+ 38.a8Q (38.f4 Qb2 39.Kf3 Rc3 40.Qe3 Re3 41.fe3 Qa3 42.b5–+) 38...Qb2 39.Ke3 Re1 (39...Qe5 40.Kd2 Qc3 41.Ke2 Re1) 40.Kf4= Qe5 41.Kg4 Qf5 ½–½. juhakurimo – stealthlock, gameknot.com, 2011.

9.Nf3 Nf6 10.g3 (10.cb5 ab5 11.bc5 Na4 12.Bf6 ef6+=) 10...Bf3 11.ef3 e5 (11...e6 12.Be2=+) 12.cb5= ab5 13.bc5 Na4? (13...dc5 14.Qe2 Be7 15.Bh3=) 14.Ba1 (better 14.d4!? Rb8 15.Ba1 ed4 16.Nd4 Qa5 17.Qd2 Qd2 18.Kd2 Nc5 19.Rb1+–) 14...dc5= (worse 14...Nc5 15.d4 Nb3 16.Bb5 Ke7 17.Rc8 Qa5 18.Bc3 Qb5 19.de5+–) 15.Be5 Bd6 16.Bd6 Qd6 17.Bg2 (17.Qe2!? Kd8 18.Nd2=) 17...0–0–/+ 18.0–0 Nb2 Black prepares the advance c4. Attacks the isolani on d3 (18...Rfd8!?–/+) 19.Qd2= Nd3 (better 19...Na4=) 20.Rcd1 (better 20.Nc5 Rc5 21.Rc5 Qc5 22.Qd3+=) 20...c4–/+ 21.Nc1 Qa3 22.Nd3 cd3 (22...Rfd8!? 23.Qb4 Rd3 24.Qb5 Rd1 25.Rd1 Qb3 26.Qb3 cb3–/+) 23.Qd3=+ Qd3 24.Rd3 Rb8 (24...Rc5 25.Rb1 Rb8 26.Bf1=+) 25.Rb1= Rfc8 (25...Rb6 26.Rb4=) 26.Rdb3+= Rc5 27.Bf1 The isolani on b5 becomes a target 27...Rf5 28.f4 Ne4? (28...Rd5 29.Bb5 Kf8 30.Kg2+–) 29.Rb5?? (better 29.Bd3 Nd2 30.Bf5 Nb3 31.Rb3+–) 29...Rfb5+– 30.Rb5 (30.Bb5? Nc3 31.Rb3 Nb5–+) 30...Rb5 31.Bb5 f6 32.f3 Nc3 33.Bd3 h6 34.Kf2 Kf7 35.Ke3 Nd5 36.Kd4 Ne7 37.Be4 (37.f5 Nc6 38.Kc5 Ne5+–) 37...g5 (37...Ke6 38.Kc5+–) 38.fg5+– fg5 39.h4 gh4 40.gh4 Kf6 41.Ke3 Ke5 42.f4 Kf6 43.Kf3 Kg7 44.Kg4 Ng8 45.Bc2 (better 45.Kf5+–) 45...Nf6= 46.Kf5 Nd5 47.Be4 Ne3? (better 47...Nf4 48.Kf4 h5+=) 48.Ke5+– Ng4 49.Ke6 Nf2 50.Bf3 (better 50.Bc2+–) 50...Nd3+= 51.f5 Nc5?? (better 51...Nf4 52.Ke7 Ng6 53.fg6 Kg6 54.h5 Kh7 55.Be4 Kh8+=) 52.Ke7+– Nd3 (52...Nd7 53.Kd7 Kf6+–) 53.f6 Kh8 (53...Kg8 54.f7 Kg7 55.f8Q Kg6 56.Qf7) 54.f7 Ne5 55.f8Q Kh7 56.Be4 Ng6 57.Bg6 Kg6 58.Qf6 (58.Qf7) 58...Kh5 59.Ke6 (59.Qd4 Kg6 60.Qg4 Kh7 61.Kf6 h5 62.Qg7) 59...Kg4 60.Qh6 (60.Qf2 h5 61.Ke5 Kh3 62.Qg1 Kh4 63.Kf4 Kh3 64.Qg3) 60...Kg3 (60...Kf3 61.Qf6 Ke4 62.h5 Ke3 63.h6 Kd2 64.h7 Kd3 65.h8Q Ke2 66.Qb2 Kf3 67.Qh3 Ke4 68.Qe5) 61.Kf5 (61.Qe3 Kg2 62.h5 Kh1 63.h6 Kg2 64.h7 Kf1 65.h8Q Kg2 66.Qhh3) 61...Kh3 (61...Kf3 62.Qf4 Kg2 63.Kg4 Kg1 64.Kg3 Kh1 65.Qc1) 62.Qg5 Kh2 63.Kf4 Kh1 64.Kf3 Kh2 65.Qg2 1–0. cryco – vknyus, gameknot.com, 2011.

9.cb5 ab5

10.Na5 Ba8 11.Nf3 (11.e4 e6=) 11...Nf6 12.g3 (12.e4 e6=) 12...Na4 13.Bf6 gf6 14.Bh3 e6 15.0–0 Bh6 16.Rc2 0–0 (better 16...cb4 17.Rc8 Qc8 18.ab4 Qc3=+) 17.d4? (better 17.Bg2=) 17...Be4–+ 18.dc5 (18.d5 f5–+) 18...dc5 19.Qd8 Rfd8 (worse 19...Rcd8 20.Ra2–+) 20.Ra2 Nc3 21.Rb2 c4 22.Bg2 Nd1 23.Ra2 c3 24.Ne1 c2 25.Nb3 Bg6 26.Nc5?? (26.Ra1–+) 26...c1Q 27.Ned3 Qc4 28.Rd2 (28.Ra1 Nc3 29.Bf3 e5–+) 28...Bd2 29.Rd1 Qc2 30.Rd2 Qd2 31.Bf1 Bd3 32.ed3 Qb2 33.a4 ba4 34.Na4 Qb4 (34...Qb4 35.d4 Qe1 36.Kg2 Rc2 37.Bc4 Qf2 38.Kh3 Qf5 39.g4 Qf3 40.Kh4 Rh2) 0–1. vknyus – kevinkjt2000 (1760), gameknot.com, 2011.

10.Na5 Bd5 11.e4 Ba8 12.d4 c4 13.Nf3? (better 13.d5!?=) 13...Be4–/+ 14.Be2 h6 (14...e6 15.0–0–+) 15.0–0–/+ e6 16.Nd2 Bf5 17.g4 (17.a4!?–/+) 17...Bg6–+ 18.Nf3 Nf6 19.h3 (19.Re1 Nbd5–+) 19...Nbd5 20.Kh2 (20.Nh4 Be4 21.Ng2 g5–+) 20...Qc7 (20...Nf4 21.Rh1–+) 21.Nh4 Be7 (21...Bh7!? 22.Bf3–+) 22.Ng6 fg6 23.Bf3 0–0 24.Bd5 (24.Qe1 Nf4 25.Bb7–+) 24...Nd5 25.Qc2 g5 26.Rce1 (26.Qe4 Rf6–+) 26...Nf4 (26...Nb4 27.ab4 d5 28.Kg1 Bb4 29.Bc3 Ba5 30.Ba5 Qa5 31.Re6–+) 27.Bc1 d5 28.Bf4 (28.Kh1–+) 28...Qf4 (28...Rf4?! 29.Kg2 Qb6 30.Re2–+; 28...gf4?! 29.Re6 f3 30.Kh1–/+) 29.Kg1 Rf6 (better 29...Bd6 30.f3 Qd4 31.Kh1–+) 30.Qc3 Bd6 31.Qg3 Qg3 (31...c3 32.Nb3–+) 32.fg3 Bg3 33.Rf6 gf6 (33...Be1?! 34.Re6 Bc3 35.Nc6–+) 34.Re6 Kf7 (better 34...c3 35.Nb3 c2 36.Rb6–+) 35.Re2 Rc7 36.Rc2 Ra7 37.Rc3 (37.Re2 Ra6–+) 37...Be1 (better 37...Bc7–+) 38.Nc6?? (38.Rc2 Kg6–+) 38...Rc7 (better 38...Bc3 39.Na7 Bd4 40.Kg2 Ba7 41.Kf3–+) 39.Re3? (39.Nd8 Kg6 40.Rc2–+) 39...Bd2 (39...Rc6?! 40.Re1 Re6 41.Ra1–+) 40.Re2 Bc1 (better 40...c3 41.Na5 c2 42.Nb3 c1Q 43.Nc1 Rc1 44.Kg2–+) 41.Nd8 Kg6 42.Ne6 Ra7 43.h4 (43.Nf8 Kf7 44.Ne6 Re7 45.Nd8 Ke8–+) 43...gh4 (43...Ra3?! 44.h5 Kf7 45.Nd8 Kf8 46.Ne6 Kg8 47.Kf2–+; 43...Ba3?! 44.h5 Kf7 45.Nd8 Kg7 46.Nc6–+) 44.Nf4 (44.Kf1–+) 44…Bf4 0–1. vknyus – juhakurimo, gameknot.com, 2011.

10.Na5 Bd5 11.e4 Be6 12.Nf3 White prepares e5 12...Bd7 13.e5 d5?? (better is 13...Na4 14.Ba1 f6 15.ed6 ed6=) 14.Nb7+– (14.bc5?! Na4 15.Qd2 Nb2=) 14...Qc7 15.Nc5 Qa7 16.Nd7 Rc1 17.Qc1 Qd7 18.Be2 g6?? (better is 18...e6+–) 19.e6! Qe6 (19...Qe6 20.Nd4 Double attack (20.Bh8 Discovered attack; 20.Nd4 Decoy); 19...fe6 20.Bh8 Discovered attack) 20.Bh8 f6 (20...Qd7 21.Qf4 Qc8 22.0–0+–) 21.Nd4 (21.Nd4 Qd7 22.Qc5+–) 1–0. vknyus – stealthlock, gameknot.com, 2011.

10.bc5 Na4 11.Ba1 dc5 12.Nf3 c4 (12...Nf6=+) 13.Nbd4 (13.dc4!? Qd1 14.Kd1 bc4 15.Na5+=) 13...Qa5 (13...e5 14.Nb5 Qa5 15.Qd2 Qb5 16.dc4–/+) 14.Nd2 (14.Qd2 c3 15.Qg5=+) 14...Nc5 (better 14...e5 15.Nc2 cd3–/+) 15.dc4+= Qa3 (15...bc4!? 16.Rc4 Qa3+=) 16.Nb5+– Qa6 17.Bd4 Qa8? (17...e5 18.Bb2+–) 18.Be5 (18.Ra1 Qb8 19.Na7 e5 20.Nc8 ed4+–) 18...Na6? (better 18...Bg2 19.Rg1 Bf1+–) 19.Ra1+– Kd7? (19...f6 20.Nc7! Nc7 21.Ra8 Na8 22.Bc3+–) 20.Nb3 (better 20.Nf3 Ke8 21.Qa4+–) 20...Kc6 (20...Ke8+–) 21.Qd5 Kb6 22.Bd4 (22.Bd4 Nc5 23.Bc5 Rc5 24.Qc5) 1–0. vknyus – ladyofknight, gameknot.com, 2011.

10.bc5 Na4 11.Ba1 dc5 12.Nf3 e6 13.g3 (13.Nbd2 Qa5=) 13...Nf6 14.Bg2 Bd5 (14...c4 15.dc4 Qd1 16.Kd1 Ba3 17.cb5 Bc1 18.Nc1–/+) 15.0–0 Be7 16.e4 Bb7 17.Ng5 h6 18.Nh3 Qd7 19.e5 (19.Nf4!?=+) 19...Bg2–/+ 20.Kg2 Qd5 (20...Nd5!?–/+) 21.Kg1=+ Nd7 22.d4? (better 22.Nf4!? Qa8 23.Nd2=+) 22...c4–+ 23.Nf4 Qa8 24.Nd2 Ba3 25.Rb1 (25.Rc2!?–+) 25...c3 26.Bc3?? (26.Qb3 Be7 27.d5 cd2 28.de6 fe6 29.Ne6–+) 26...Nc3 (26...Rc3?! 27.Rb5 0–0 28.Qg4–+) 27.Qf3 (27.Qg4 Nb1 28.Rb1 0–0–+) 27...Nb1 28.Nb1 (28.Qa8 Ra8 29.Rb1–+) 28...Qf3 29.Na3 b4 (better 29...Qa3 30.h3–+) 30.Nb5 0–0 31.Nd6 Rc2 32.h4 b3 (better 32...Ra8 33.Nh3 Qc3–+) 33.Rb1 Qf2 34.Kh1 Qh2 0–1. vknyus – lanre1, gameknot.com, 2012.

10.bc5 Na4 11.Ba1 (11.Bd4!? e5 12.Ba1=) 11...dc5–/+ 12.Nh3 (12.Nf3 Nf6–/+) 12...e6 13.Qd2 Nf6 14.Bf6 (better is 14.Na5!? Ba8 15.Rb1–/+) 14...Qf6–+ 15.e3 Be7 16.d4 c4 17.Qa5? (17.Na5 Ba8 18.Qd1–+) 17...Bc6 (17...0–0 18.Nd2 Bc6 19.Nf3–+) 18.Bc4 0–0 (better is 18...bc4 19.Rc4 Ra8–+) 19.Bb5 Bg2 20.Rg1 (20.Rc8 Rc8 21.Rg1 Qf5 (worse is 21...Bh3 22.Ba4 Qf3 23.Nc5–/+) 22.Qa4 Bh3–+ (worse is 22...Qh3 23.Bf1 Bf1 24.Rf1–/+)) 20...Ra8 (20...Bh3?! 21.Rc8 Rc8 22.Ba4–/+) 21.Qd2? (better is 21.Ba6 Bh3 22.Qa4–+) 21...Bh3 22.Ba4 (22.Bc6 Ra7 (worse is 22...Ba3 23.Ba8 Ra8 24.Ra1–+) 23.Rg3 Bf5–+) 22...Ra4 23.Nc5 Bc5 24.dc5 (24.Rc5 Ra3 25.Qb2 Ra7–+) 24...Ra3 25.c6 (25.Rd1 Ra1 26.c6 Rd1 27.Qd1 Ra8–+) 25...Ra7 (better is 25...Rd8 26.c7 Rd2 27.c8Q Rd8–+) 26.c7 Rc8 27.Rd1 (27.Qd7 Raa8 28.Rg3–+) 27...Rac7 28.Rg3 Bf5 (better is 28...Rc2 29.Rh3 Rd2 30.Rd2–+) 29.Rf3 (29.Qd4 e5 30.Qd6 Qd6 31.Rd6 Rc1 32.Rd1 Rd1 33.Kd1–+) 29...e5 (better is 29...g6 30.e4 Qe5–+) 30.Rf5–/+ Qf5?? (better is 30...Qe7 31.Qd5 Rc5–/+) 31.Qd8!! Rd8 (31...Rd8 32.Rd8 32.Rd8 1–0. lanre1 – stealthlock, gameknot.com, 2011.

3.d3 Nc6

4.a3 e6 5.e3 a5 6.c3 Qf6 7.d4 e5 8.d5 Nce7 9.e4 (9.Bb5 e4=) 9...Qf4 10.Nd2 c6 11.Nh3 Qf6 12.c4 bc4 13.Bc4 (Better is 13.Nc4!? Qg6 14.f3 cd5 15.Ne5+=) 13...cd5=+ 14.ed5 ab4 15.Ne4 Qg6 16.Qf3? Bd5 17.Bd5–/+ Ra5?? 18.Nd6! Kd8 19.Nb7 Kc8 20.Na5 Qc2 21.Rc1 1–0. audrey – sperm1, Live Game Caissa's Web, 2004.

4.Bc3 e5=+ 5.Nf3 Qe7 Can b4 get defended? (5...Bb4 6.Bb4 Nb4 7.Ne5–/+) 6.e4 Nf6 7.d4?? (better 7.a4 a6 8.ab5 ab5 9.Ra8 Ba8 10.Nbd2=) 7...d6?? (better 7...ed4 8.Bd4 Ne4–+) 8.d5+– Nd8 9.Bb5 c6 10.dc6 Bc6 11.Bc6 Nc6 12.0–0 a6 (12...Qb7 13.Qe1+–) 13.Ng5 (13.Re1!?+–) 13...h6 14.Nf3 Qe6 (14...Qb7 15.Re1+=) 15.Re1 Qc4 16.Nfd2 Qe6 17.a4 Be7 (better 17...d5 18.ed5 Qd5+–) 18.a5 (better 18.b5!? ab5 19.ab5 Ra1 20.Ba1+–) 18...0–0 (18...d5!?=) 19.Nf3+– Rfb8 20.Ra4 Rd8 21.Qd3 Ng4 (21...d5 22.ed5 Nd5 23.Be5 Bb4 24.Bc3 Nc3 25.Re6 Rd3 26.cd3 fe6 27.Nc3=) 22.b5 (22.Bb2 Nf6 23.c4 Nh5+–) 22...ab5 Black is in command 23.Ra1 (better 23.Qb5!? d5 24.ed5 Rd5 25.Qc4+–) 23...b4= 24.Bd2 (24.Qd5 Qc8 (worse 24...bc3 25.Qc6 Rdc8 26.Qb5=) 25.Bb2 Qb7=+) 24...d5=+ 25.ed5 (better 25.a6!?=+) 25...Rd5–+ (25...Qd5?! 26.Qd5 Rd5 27.a6=+) 26.Qc4 (26.Qe4 Rda5 27.Ra5 Ra5–+ (worse 27...Na5 28.Qa8 Kh7 29.Qa5+–)) 26...Rda5 (better 26...Bc5!? 27.Be3 Ne3 28.fe3 Be3 29.Kh1 e4–+ (29...Na5?! 30.Qb4 Bf2 31.Rf1–/+; 29...Raa5?! 30.Ra5 Na5 31.Qb4–/+)) 27.Ra5 Qc4 (27...Na5?! 28.Qe6 fe6 29.h3= (29.Ne5? Ne5 30.Re5 Nc4–+); 27...Ra5?! 28.Qe6 fe6 29.c3–/+) 28.Ra8 Kh7 29.Nh4?? (better 29.h3 e4 30.hg4 ef3 31.gf3–+) 29...Bh4 30.c3 (30.g3 Nd4 31.Ra7 Nf3 32.Kg2–+) 30...Bf2 31.Kh1 Be1 32.Kg1 (32.Rh8 Kh8 33.Kg1 Bf2 34.Kh1 Qf1) 32…Bf2 (32...Bf2 33.Kh1 Qf1) 0–1. war_child – gordiemac, ChessWorld.net, 2012.

3.d3 Nf6

4.e4 d6 5.Nd2 e5 6.Ngf3 Be7 7.Be2 Nbd7 8.0–0 0–0 9.Re1 Re8 10.Qb1 Nf8 (10...a6 11.Nb3=) 11.c3 (11.d4 A) 11...Be4? 12.Ne4 (12.Bb5?! c6 13.de5 de5 14.Ne4 cb5+–) 12...Ne4 13.Bb5+– (13.de5?! c6+–); B) 11...a6+=) 11...Ng6= 12.Bd1 a5 13.a3 ab4 14.cb4 Qd7 15.Bc2 Qg4 16.d4 Nf4 17.g3 Nh3 18.Kg2 Ng5 Will e4 fall? (18...ed4 19.Nd4 Nf4 20.Kg1=) 19.d5 (19.Ng5!? Qg5 20.de5+=) 19...Nf3 20.Nf3 c6 21.Bb3? (better 21.h3 Qd7 22.dc6 Bc6 23.Qd1=+) 21...cd5–+ 22.ed5 (22.h3 Qh5 23.ed5 Nd5–+ (23...Bd5?! 24.Bd5 Nd5 25.Be5=+)) 22...Nd5 23.Bd5 Bd5 24.Qd1 Bc6 25.Rc1 Rac8 26.Qe2 e4?? (better 26...Bf6 27.Rc6 Rc6 28.Qb5 Rec8–+) 27.Nd4=+ Attacking the isolated pawn on b5 27...Qe2 28.Ne2? (28.Re2 Bd5 29.Rc8 Rc8=) 28...e3 (better 28...Bg5!? 29.Nf4 f6–+) 29.f3=+ f6 (29...Kf8 30.h4–/+) 30.Nd4= Bf8?? (better 30...Bd7=) 31.Nc6+– Rc7 32.Nd4 Rec8 (32...Rb7 33.Rc3+–) 33.Rc7 (better 33.Nb5!? Rc2 34.Kh3 d5+–) 33...Rc7 34.Nb5 (34.Nb5 Rc2 35.Kh3 Rb2 36.Re3+–) 1–0. alessandrocarvalhaes (1860) – halteristaangel (1885), lichess.org, 2019.

4.e4 e6 5.a3 Be7 (5...a5 6.e5 Nd5 7.c4=) 6.Ne2 (6.e5!? Nd5 7.c4 bc4 8.dc4=) 6...0–0+= 7.Nd2 a6 8.c4 c5 (8...d5 9.e5 Nfd7 10.Rc1+=) 9.Qb3 (9.bc5!? Bc5 10.e5=) 9...cb4–/+ 10.ab4 bc4 11.Nc4 d5 12.Na5 Bc8 (12...Qb6 13.Ra4–/+) 13.Ng3 (13.e5 Ng4 14.Bd4 f6+=) 13...de4 (13...d4!?+=) 14.de4= Qb6 15.Bf6 (15.Bc3 Nc6=) 15...Bf6 (15...Bb4 16.Bc3 Ba5 17.Qb6 Bb6 18.Rb1–/+) 16.Rc1+= Be7 17.Rc4 (17.Rb1 Nc6 18.Nc6 Qc6+=) 17...Bd7 18.Kd1 0–1. opportunity (2320) – pushtiu (2330), net–chess.com, 2010.

4.Nf3 e6 5.e4 Bb4 6.Nbd2 c5 7.Be2 0–0 8.0–0 Nc6 9.a3 Ba5 10.Ne5 Ne5 11.Be5 Bc7 12.Bc7 Qc7 13.Nf3 e5 14.a4 a6 15.ab5 ab5 16.Qd2 d6 17.Qc3 Ra1 18.Ra1 Ra8 19.Ra8 Ba8 20.Qa1 Bc6 21.Nd2 g6 22.Qb2 Qa5 23.c3 d5 24.ed5 Bd5 25.c4 bc4 26.Nc4 Qe1 27.Bf1 Bc4 28.dc4 Kg7 ½–½. lovecraft (2100) – ramoschessbrasil (2480), net–chess.com, 2011.

4.Bf6 ef6+= 5.e4 (5.c3!?+=) 5...Bb4–/+ 6.Nd2 (6.c3 Be7–/+) 6...0–0 (6...f5 7.Ne2 fe4 8.de4–+) 7.Ngf3 (7.Rb1 Nc6–/+) 7...a6 8.Be2 Bc3 9.Rb1 d5 10.0–0 Nd7 11.ed5 Bd5 12.Ne4 Be4 13.de4 Ne5 (13...Nc5 14.Bd3–+) 14.Qd8 Rfd8 15.Rfd1 c5 16.Rd5 c4 (16...Rd5 17.ed5 Rd8 18.Rd1–/+) 17.Ne5 fe5 18.Rbd1 (18.a4 ba4 19.Bc4 Rdc8–/+) 18...Rd5–/+ 19.Rd5 Kf8 20.a3 Ke7 21.h4 Rd8 22.Rd8 Kd8 23.Bh5 (23.a4 Ke7–/+) 23...f6 (23...g6 24.Be2–+) 24.Bf7–/+ Kc7 25.h5 Kd6 26.Be8 (26.Bg8 a5–+) 26...Kc5–+ 27.Kf1 (27.h6!? gh6 28.Kh2–+) 27...a5 28.Ke2 b4 29.a4 b3 30.cb3 cb3 31.Kd1 Kb4 32.Kc1 h6 33.Kb1 Bd4 34.f3 Kc3 35.g3 Kd3 36.Kc1 Ke3 37.f4 Ke4 38.Kd2 b2 39.Kc2?? ef4–+ 40.g4 Ke3 41.Bg6 f3 42.Bd3 f2 43.g5 fg5 44.Bf1–+ g4 45.Bg2 g3 46.Kb1 Ke2 47.Bh3 f1Q 48.Bf1 Kf1 49.Kc2 g2 (49...g2 50.Kd3 b1Q 51.Kc4 Qa2 52.Kd4 g1Q 53.Ke5 Qc5 54.Ke4 Qa4 55.Kd3 Qad4 0–1. dweigel (2440) – alaamattar (2235), net–chess.com, 2012.

3.d4 d5

4.Nf3 e6 5.a3 Bd6 6.Nc3 Nc6 7.e4 a6 8.ed5 ed5 9.Nd5 Nce7 10.Ne3 Nd5 11.c4 bc4 12.Bc4 Ne3 13.Qa4 Qd7 14.Bf7! Kd8 (14...Kf7 15.Ne5 Double attack (15.Qd7 Deflection; 15.Qd7 Overloading; 15.fe3 Zwischenzug)) 15.Qd7 Kd7 16.fe3 Nf6 17.Ne5 Ke7 18.0–0 Be5 19.de5 Kf7 20.Rac1 Rac8 21.ef6 g6 22.Rfd1 Ke6 23.Rc5 Be4 (23...Rhd8 24.Re5 Kf7 25.Re7 Kf8+–) 24.Re5 (24.Re5 Kf7 25.Rd7 Kf8 26.Re4+–) 1–0. usingprogram (2035) – yellowgreen, internet, 2012.

4.Nf3 Nf6 5.a3 (5.e3 e6=) 5...a6 6.e3 e6 7.Bd3 Bd6 8.0–0 c6 9.Ne5 (9.Nbd2 a5=) 9...Nbd7 10.f4 Nb6 11.Bc3 Na4 12.Ra2 Nc3 13.Nc3 a5 14.Rb2 ab4 15.ab4 Ra3 16.Nb1 Ra4 17.c3 g6 18.Qc2 Qe7 19.Nd2 Nd7 (19...0–0 20.Nb3=) 20.e4 (20.Nb3 f6 21.Nd7 Qd7+=) 20...Be5 (20...0–0!?=) 21.fe5+– Nb6 (21...0–0 22.Nf3+–) 22.Nb3 (22.Rbb1+–) 22...Nc4? (better 22...de4 23.Be2 Nd5+=) 23.Bc4+– dc4 24.Nc5 Ra8 25.Qf2 Ra3 (25...0–0 26.Qf3+–) 26.Rc2 (26.Ra2 Ra2 27.Qa2 Bc8+–) 26...0–0 27.Qe3 (worse 27.Nb7 Qb7 28.Qg3 c5 29.bc5 Qe4+=) 27...Bc8 (27...Rfa8 28.Rcf2 Ra1 29.Qf4+–) 28.Rcf2 Kg7 29.Rf6 Bd7 (29...Kg8 30.Qh3+–) 30.Qf3 (30.Qg5 Kh8+–) 30...Bc8 31.h4 h5 32.Qe3 Bd7 (32...Qc7+–) 33.Qg5 Threatening mate... how? 33...Qe8 34.R1f3 (34.d5 cd5 35.ed5 ed5 36.e6 Be6 37.Ne6 fe6 38.Rf8 Qf8 39.Qe5 Kg8 40.Qe6 Kg7 41.Qd7 Kg8 42.Qd5 Kg7 43.Qe5 Kg8 44.Rf8 Kf8 45.Qf6 Ke8 46.Qg6 Kd7 47.Qh5+–) 34...Ra7 35.Rg3 (35.d5 cd5 36.ed5 Qc8+–) 35...Kh7 36.Kh2 Bc8 37.Kh3 Rg8 38.Rgf3 Kg7 39.g4 (39.Kg3 Qe7+–) 39...Rh8 40.R6f4 hg4 41.Rg4 Qe7 42.Rf6 Rh6 43.Rg6?? (better 43.h5+–) 43...fg6–+ 44.Qe3 (44.Qe7 Re7 45.Rg1 Ra7–+) 44...Ra1 45.Qf3 g5 46.Qg2 Rh5 (46...Kh7 47.Rg5 Rc1 48.Kg4–+) 47.Kh2 (47.Rg5 Qg5 48.Qg5 Rg5 49.hg5 Ra3–+) 47...Kh6 48.Qb2 (48.Kh3 Rh4 49.Rh4 gh4–+) 48...Rf1 (48...Qa7 49.Kh3 Qf7 50.Qg2–+) 49.Qd2 (49.Qe2 Qf7 50.Kg2 gh4 51.Qe3 Kh7 52.Kh2–+) 49...Rf4 (49...Qf8 50.Qe3 Rf3–+) 50.Rf4 gf4 51.Qf4 Kh7 52.Kh3 Kh8 53.Qf6? (53.Kg3 Qg7 54.Kf3 Rh6–+) 53...Qf6 54.ef6 e5 55.Kg3 ed4 56.cd4 (56.Kf3 dc3 57.f7 Kg7–+) 56…Rc5! (56...Rc5 57.h5 Rh5–+) 0–1. petrobbo (1955) – Colin2006 (2050), ChessWorld.net, 2009.

3.e3 a5

4.a3 ab4 5.ab4 Ra1 6.Ba1 Nc6 7.Nf3 Nb4 8.Bb5 c6 9.Be2 Qa8 10.Nc3?? (10.Bc3 Qa4 11.0–0 e6+= (11...Nc2? 12.Ne1+–)) 10...Nf6 (better 10...Qa1! 11.Qa1 Nc2 12.Kd1 Na1–+) 11.0–0+= g6 (11...c5!?+=) 12.Qb1 c5 13.Nb5 Ne4?? (better 13...Qd8+–) 14.Nc7+– Kd8 15.Na8 Ba8 16.Bh8 Nd2 17.Nd2 Bg2 18.Kg2 1–0. GuestKGMW – GuestHXWB, freechess.org, 2017.

4.a3 Nf6 5.Nf3 (5.Bb5?? Bg2 6.Be2 Bh1–+) 5...a4 (5...c6!?=) 6.c4 (6.Bb5 c6 7.Be2 e6+–) 6...g6 (6...bc4!? 7.Bc4 Nd5+/–) 7.cb5 Bg7 (7...Bd5 8.Bf6 ef6 9.Bd3+–) 8.Nc3+– c6 (8...0–0 9.Na4 Bd5 10.Bf6 Bf6 11.Nc3+–) 9.Na4 cb5 (9...d6 10.Bc4+–) 10.Bb5 Ba6 11.Ba6 Ra6 12.Nc5 Ra7 13.Qb3 (13.Ne4 Nh5 14.Bg7 Ng7+–) 13...e6 14.Ne4! d5 (14...Ne4 15.Bg7 Pinning (15.Bg7 Deflection)) 15.Nf6 Bf6 16.Rc1 (16.Bf6 Qf6 17.Qc3 Qc3 18.dc3 Rc7+–) 16...Bb2 17.Qb2 f6 18.0–0 0–0 19.Rc3 Rc7 20.Rfc1 Rff7 21.Rc7 Rc7 22.Nd4 Rc1 23.Qc1 Kf7 24.Nc6 Nc6 25.Qc6 Qe7 26.d4 f5 27.Qc5 Qb7 28.a4 Kf6 29.a5 Qa6 30.g3 h5 31.h4 g5 32.hg5 Kg5 33.Qe7 Kg4 34.Qh4 Kf3+– 35.Qh5 Ke4 36.Qd1 Qc4 37.Qb1 Kf3 38.Qb2 Qd3 39.Qc1 Qe2 40.Qf1 Qd2 41.Qg2 Ke2 42.f4 Ke1 43.Qd2 (43.Qd2 Kd2 44.Kf2+–; 43.Qf1) 1–0. Fournier,Frederic – Vinsot,Serge, Ch Club, 1996.

4.ba5 Ra5 5.Nf3 Be4 6.Nc3+/– Bf3 7.Qf3 b4 8.Nd1 (8.Nb5 e6+/–) 8...c6? (8...Nf6 9.Bd3=) 9.Bc4 (9.e4!?+/–) 9...d5+= 10.Be2 e6 11.c3 b3 (better is 11...Nf6=) 12.a3?? (12.ab3!? Ra1 13.Ba1+/–) 12...Ra4 (12...Nf6 13.c4+=) 13.0–0 (13.c4=) 13...f5?? (better is 13...Nf6!? 14.c4 Ne4 15.cd5 Nd2–/+) 14.d3 (14.c4 Nd7 15.cd5 cd5+/–) 14...h5 (14...Rg4 15.c4 Nf6 16.cd5 cd5 17.e4 fe4 18.Qh3+/–) 15.c4+/– Nf6 16.Nc3 Ra5 17.Bd1 Qb6 18.cd5 cd5 19.d4 (19.a4 Nbd7+=) 19...g5 (19...Bd6 20.Qe2+=) 20.Rc1 (better is 20.a4 Nc6 21.Qe2+=) 20...Ba3?? (20...h4 21.Rb1 Bd6 22.Qe2=) 21.Rb1?? (better is 21.Ba3 Ra3 22.Nb1+–) 21...Qb4 (21...Bd6 22.Bc1=) 22.Ba3 (22.Qe2!? Ke7 23.Ba1=) 22...Ra3+= 23.Qg3? (better is 23.Na2 Qb6 24.Qe2+=) 23...0–0?? (better is 23...Nbd7 24.Qc7 Kf7–+) 24.Qg5+/– Kf7 25.Bh5 Nh5 26.Qh5 Ke7 27.Rfc1 (better is 27.Qg5 Kd6 28.Qg3 Ke7 29.Ne2+–) 27...b2= 28.Rc2 (better is 28.Nd5!? ed5 29.Qh7 Kd8 30.Qc7 Ke8 31.Qe5 Kd8 32.Qc7 (worse is 32.Qd5 Nd7 33.Rd1 Qc3–/+) 32...Ke8 33.Qe5 Kd8 34.Qc7= (worse is 34.Qd5 Nd7 35.Rd1 Qc3–/+)) 28...Rc3–/+ 29.Rbb2?? (better is 29.Qd1–/+) 29...Qa3 (better is 29...Rc2 30.Qg5 Kd6–+) 30.Rb7?? (30.Qg5 Kd6 31.Qf4 Ke7 32.Qg5 Kd6 33.Qf4 Ke7 34.Qg5=) 30...Nd7?? (better is 30...Kd6 31.Rb6 Nc6–+) 31.Qh7= Kf6?? (31...Rf7 32.Rd7 Kd7 33.Qf7 Kd8 34.Qf6 Kd7 35.Qg7 Ke8 36.Qg6 Kd7 37.Qf7 Kd8 38.Qg8 Kd7 39.Qf7=) 32.Qh6?? (32.h4 Rf7 33.Qg8+–) 32...Kf7?? (32...Ke7 33.Qh7 Kf6 34.h4+–) 33.Qh7 (33.Rd7 Qe7 34.Qh7 Kf6 35.Re7 f4 36.Rg7 Rf7 37.Rf7 Kg5 38.h4 Kg4 39.Rf4) 33...Kf6+/– 34.Qh6 (better is 34.h4!? Rd8 35.Rc3 Qc3 36.Rd7 Qe1 37.Kh2 Rd7 38.Qd7 Qf2 39.Qd8 Kf7 40.Qg5+–) 34...Ke7 35.Qg7 Rf7 36.Rd7 Kd7 37.Qf7 Kc6?? (better is 37...Kd8 38.Qf6 Kd7 39.Qg7 Ke8 40.Qg6 Kd7 41.Qf7 Kd8 42.Qg8 Kd7 43.Qf7=) 38.Rc3+– (38.Qe6?! Kb7 39.Qd5 Kb6 40.Qe6 Kb7=) 38...Qc3 39.Qe6 Kb5 (39...Kc7 40.g3 Qd3 41.Qd5+–) 40.Qd5 Kb4 (40...Ka4 41.g3 Qc2+–) 41.Qc5! Qc5 42.dc5 Kc5 43.h4 (43.g3 Kc4 44.h3 Kd3+–) 43...Kd6 44.g3 Ke6 45.Kg2 Kf6 46.Kf3 Ke5 47.g4 fg4 48.Kg4 (48.Kg4 Ke6 49.f4+–) 1–0. billmota (2345) – jdmoulton (2125), net–chess.com, 2014.

4.Bb5?? ab4 5.Nf3+=.

4.Nf3 a4? 5.Bb5+/– Bc6 (5...e6 6.0–0+–) 6.Bc6 (6.Be2 e6+/–) 6...Nc6 7.b5 Nb8 (7...Rb8 8.Nc3+/– (< 8.bc6 Rb2 9.c3 Qa8+/–)) 8.0–0 c6 (8...e6 9.Ne5 Nf6 10.d3+–) 9.c4 (9.Ne5 d6 10.Nc6 Nc6 11.bc6 Qc8+–) 9...cb5 (9...d5 10.d3+–) 10.cb5 Qb6 (10...d5 11.Na3+–) 11.Qc2 (11.Na3 e6+–) 11...Qb7 (11...f6 12.Qe4 Ra5 13.Na3+–) 12.Rc1 Kd8 (12...f6 13.Qc8 Qc8 14.Rc8 Kf7 15.Nc3+–) 13.Ne5 (13.Ng5 Nh6+–) 13...Nh6 14.Bd4 (14.b6 Nc6 15.Nc6 dc6 16.Qc6 Qc6 17.Rc6 e6+–) 14...e6 15.Qc8!! Qc8 16.Bb6 Ke7 17.Rc8 (17...Kf6 18.Rb8 Rb8 19.Nd7 Kf5 20.Nb8+–) 1–0. pcmvr (1780) – rasputin, internet, 2005.

4.Nf3 ab4 5.Bb5 c6=.

4.Nf3 ab4 5.Bb5 e6 6.0–0 c6 (6...Nf6 7.a3=) 7.Be2 Nf6 8.c3 bc3 (8...Na6 9.a3 bc3 10.Nc3+=) 9.Nc3 Be7 (9...c5 10.Rb1+=) 10.d4 (10.Qb3 Ba6+=) 10...0–0= 11.Qb3 (11.Rb1 Na6+=) 11...Ba6 12.a4 (12.Rab1 Be2 13.Ne2 Qc7=) 12...Be2 13.Ne2 Qc7 (13...Na6 14.Rfb1=) 14.Ba3 d6 15.Qc2 Nbd7 16.Nc3 Rfc8 17.e4 (17.Rfc1 Nb6=) 17...c5=+ 18.Rac1 (18.Rfc1 Qa7 19.Qd1 cd4 20.Nd4 Nc5 21.Bc5 Rc5=+ (worse 21...Qc5 22.Nd5 Qa7 23.Nc6 Rc6 24.Ne7 Qe7 25.Rc6+–)) 18...Qa7 (18...Qa5 19.Rfd1=+) 19.dc5 (19.Qd1 Nb6 20.Ra1 Na4 21.Na4 Qa4–/+) 19...Nc5 20.Bc5 Rc5 (worse 20...dc5 21.Rfd1=) 21.Nd4 d5 22.Ndb5 Qa5 23.f3 (23.ed5!? Nd5 24.Qe4 Nc3 25.Nc3–/+) 23...Rac8–+ 24.Qd3 Bf8 25.Rf2? (better 25.e5 Nd7 26.f4–+) 25...Rc4 26.Rfc2 (26.e5 Nd7 27.Rff1 Ne5–+) 26...d4! 27.Kf1 (27.Nd4 Rd4) 27...dc3 (27...Rc3?! 28.Nc3 dc3 29.Rc3 Rc3 30.Rc3 Qa4 31.Rc8–/+) 28.Rc3 Rc3 29.Rc3 Rc3 30.Nc3 Qb4 (30...h5 31.h4–+) 31.h3 (31.g3 Qb2 32.e5 Nd7 33.Qd7 Qc3–+) 31...g6 32.g4 (32.g3 Qa3 33.Kg2 Bb4 34.Qd8 Kg7–+) 32…Nd7! (32...Nd7 33.Qd7 Qc3–+) 0–1. GuestHWYC – GuestXCMD, freechess.org, 2020.

4.ba5 e6

5.Na3 Ra5 6.Qc1 =+.

5.a4=.

5.Bb5? Bg2 6.Qg4 Ra5 7.Qg2 Rb5 8.Bg7 Bg7 9.Qg7+=.

5.Bb5? Bg2 6.Qg4 Ra5 7.Bg7?? Bg7 8.Qg7 Qf6 9.Bd7 Nd7 10.Qg2 Qa1 –+.

5.Bb5? Bg2 6.Qg4 Bh1 –+.

4.Bb5?? Bg2

5.Qg4 Bh1 –+.

5.Bg7 Bg7 –+.

5.Bg7 Bh1 6.Bh8 ab4 7.Qg4+=.

5.Bg7 Bh1?! 6.Bh8 e6 7.a4=.

5.Bg7 Bh1 6.Bh8 e6 7.ba5+/–.

3.e3 a6

4.a3 e6 5.Nf3 d5 6.c4 (6.c3=) 6...c5 (better 6...dc4 7.d3 cd3 8.Bd3 c5–/+) 7.cb5+– Nf6 8.ba6 Ba6 9.b5 Bb7 10.a4 Be7 (10...Nbd7 11.d3+–) 11.Be2 0–0 12.0–0 Ne4 (12...Nbd7 13.Nc3+=) 13.d3 Bf6 14.Qc2 Bb2 15.Qb2 Nf6 16.Nbd2 Nbd7 17.Rfc1 Nb6? (better 17...Qb6!?+–) 18.a5 Nbd7 19.a6 (19.Nb3 Rc8+–) 19...Bc8 20.Nb3 Qb6 21.Qc3 (better 21.Qd2!?+–) 21...Qb5+= 22.Nc5 Nc5 23.Qc5 Qc5 24.Rc5 Ba6 25.Rca5 Bb7 26.d4 Ra5 27.Ra5 Ra8 28.Ra8 Ba8 29.Ne5 Kf8 30.f3 Ke7 31.Kf2 Nd7 32.Nd3 Kd6 33.f4 Bc6 34.Bh5 g6 35.Bd1 f6 36.Nb4 Ba8 37.Bc2 e5 38.h4 ed4 (38...e4 39.g4=) 39.ed4+= Nb6 40.Bd3 Nd7 41.Ke3 (41.g4 Bb7+=) 41...Bc6 42.h5 (42.Nc6 Kc6 43.f5 g5+=) 42...gh5= 43.Bh7 Bb5 (43...h4 44.Kf3 Bb5 45.Kg4+=) 44.Bg6 (44.g3!?+=) 44...h4= 45.Nc2 Nf8 46.Bf5 Bf1 (46...Be8!?=) 47.Ne1 Ne6 48.Be6 (48.Bh3!?+=) 48...Ke6= 49.Kf2 Bc4 50.Nc2 Kf5 51.Kf3 Bd3 (better 51...Ke6!?+=) 52.Ne3+– Kg6 53.Nd5 Be4?? (better 53...f5 54.Nc3 Kf6+–) 54.Ke4+– Kh5 55.Kf3 f5 56.Ne3 Kg6 57.Nd1 (better 57.Nf5!? Kf7+–) 57...Kf6 58.Nf2 Kg6 59.Nh3 Kh5 (59...Kg7 60.Ke3 Kf6 61.Ng1+–) 60.Ke3 Kg6 61.d5 Kf6 62.Kd4 Ke7 63.Ke5 Kd7 64.Kf5 (better 64.d6!? Kc6 65.Ke6 Kb7+–) 64...Kd6 65.Kg4 Kd5 66.Kh4 Kd6 67.Kg5 Ke6 68.f5 Ke7 69.f6 Kf8 70.Kf5 Kg8 (70...Kf7 71.g4 Kg8 72.Ke6 Kh8 73.f7 Kg7 74.Ke7 Kh6 75.f8Q Kh7 76.Ng5 Kg6 77.Qf6) 71.Ke6 Kf8 (71...Kh7 72.g4 Kg8 73.Ke7 Kh8 74.f7 Kh7 75.Kf6 Kh8 76.f8Q Kh7 77.Ng5) 72.f7 Kg7 73.Ke7 Kg6 (73...Kh6 74.f8Q Kh7 75.g4 Kg6 76.Qf7 Kh6 77.g5) 74.f8Q Kh5 (74...Kh7 75.g4 Kg6 76.Qf7 Kh6 77.g5) 75.Qf3 (75.Qf6 Kg4 76.Qg5) 75...Kh4 (75...Kg6 76.Qf6 Kh7 77.Ng5 Kg8 78.Qf8) 76.Qf4 Kh5 77.Qg5 1–0. BeepBeepImAJeep (2640) – aircracking (2280), lichess.org, 2016.

4.a3 e6 5.Nf3 d6 6.c4 Nf6 (6...c6!?+=) 7.cb5+– ab5 8.Bb5 Bc6 (8...c6 9.Bd3+–) 9.Be2 (9.Bc6 Nc6 10.d3 Nb8+–) 9...Be7 10.0–0 d5 11.d4 Ne4 12.Ne5 Bd7 (12...Ba4 13.Qc1+–) 13.Nd2 (13.Bd3 Nf6+–) 13...f6 (better 13...Ba4!? 14.Qc1 Nd2 15.Qd2 Nd7+–) 14.Nd7+– Nd7 (14...Qd7 15.Ne4 de4 16.Bc4+–) 15.Ne4 de4 16.Qb3 Nf8 (16...Kf7 17.d5 Nf8 18.Bc4+–) 17.Bb5 Kf7 18.Rac1 (18.Bc6 Rb8+–) 18...Bd6 19.d5 e5 20.f4 (20.Bc6 Ra7+–) 20...Kg6? (20...ef4 21.Bc6 Rb8+–) 21.fe5 Be5 22.Be5 fe5 23.Qc4 Qh4 (23...Kh6 24.Qe4 c5+–) 24.g3 (better 24.Qc6 Kg5 25.Qa8 Ng6+–) 24...Qg4 (24...Qe7 25.Qc6 Ne6 26.de6+–) 25.Qc6 Kh5 (25...Ne6 26.de6 h5 27.e7 Kh7 28.Qd5+–) 26.Qa8 Ng6 27.Qa6 Nh4 28.Be2 Nf3 29.Kg2 Rf8 30.Rf2 Rf6 (30...Nh4 31.Kh1 Nf3+–) 31.Rcf1 (31.Qf6 gf6 32.Rf3 ef3 33.Bf3 f5 34.Rc7 Qf3 35.Kf3 Kg5+–) 31...Kg5?? (31...Ra6 32.Ba6 Qg5+–) 32.Bf3 (better 32.Qb5+–) 32...ef3–+ (32...Ra6?? 33.h4 Qh4 34.gh4 Kh6 35.Be2 Rg6 36.Kh3+–) 33.Rf3 Qe4 (better 33...Ra6 34.Ra1 Qe4–+) 34.Qe2 Qd5 (34...Kh6 35.Kg1 Rg6+–) 35.e4 Qd7 36.Rf5 Kg6 37.Qh5 1–0. BeepBeepImAJeep (2685) – johnybv50 (1905), lichess.org, 2016.

4.a3 Nf6 5.Nf3 g6 6.c4 bc4 7.Bc4 d5 8.Be2 Bg7 9.d4 0–0 10.0–0 Nbd7 11.Nbd2 Re8 12.Nb3 e5 (12...Bc6!?+=) 13.de5 Ng4 14.Nc5 (14.Qd2!?+–) 14...Nc5+= 15.bc5 Ne5 16.Ne5 Be5 17.Be5 Re5 18.Qd4 Qe7 19.Rab1 Bc6 20.Rfd1 Re4 21.Qc3 Re8 (21...Qe5 22.Qd2+=) 22.Rb4 (22.Ba6 Ra4 23.Be2 Qg5+–) 22...f5 (22...Qg5!? 23.Bf3 Qe5 24.Qe5 R4e5+=) 23.Ba6+– f4 24.Re4 Qe4 25.ef4 (25.Bd3 Qg2 26.Kg2 d4 27.e4 dc3 28.Kf3+–) 25...d4 (better 25...Qa4!? 26.Qd3 Ra8=) 26.Qg3+– Qc2 The mate threat is Qxd1 27.Rf1 (27.Rd4?? Re1 28.Bf1 Rf1 29.Kf1 Bb5 30.Kg1 Qc1 31.Rd1 Qd1) 27...Qc5 28.h3 (28.f5 Qf5 29.Qc7 Qd5+–) 28...Qa5 (28...Ra8!? 29.Qd3 Kg7=) 29.Bc4+– Kg7 30.Qd3 (30.f5 Qe5+–) 30...Rd8 31.Rd1 Qc5 32.Bb3 (32.f3+=) 32...h5 (32...Qa3 33.Qc4 Kh6 34.g4+–) 33.Qd2 (33.Qe2 Re8 34.Qb2 Re4+–) 33...h4 (better 33...Qa3!? 34.Qc2 Qd6=) 34.Rc1+– Qd6 35.Qb4 (better 35.f5 Be4 36.fg6 Kg6 37.Qe2+–) 35...Qf6?? (35...Qb4 36.ab4 Rd6 37.Rc5+–) 36.Qc5 (36.Rc6 Qc6 37.Qe7 Kh6 38.Qh4 (38.Qd8?! Qc1 39.Bd1 Qd1 40.Kh2 Kg7+–) 38...Kg7 39.Qe7 (39.Qd8?! Qc1 40.Bd1 Qd1 41.Kh2 c5+–) 39...Kh6 40.g4 (worse 40.Qd8 Qc1 41.Bd1 Qd1 42.Kh2 Kg7+–) 40...Qc1 41.Kg2 Qf4 42.Qd8 Qe4 43.Kg3 Qe5 44.Kf3+–) 36...Rd6+– 37.Qe5 d3 38.Rd1 d2 39.Qe3 Qf5 (39...Rd4!?+–) 40.Rd2 Qb1 (40...Rd2 41.Qd2 Qe4 42.f3 Qb1 43.Qd1+–) 41.Bd1 (41.Kh2!? Qe4 42.Qe4 Be4+–) 41...Rd2 42.Qd2 Qe4 Do you see the mate threat? 43.Bf3 Qb1 44.Qd1 Qb6 (44...Qd1 45.Bd1 Bb7 46.a4+–) 45.Bc6 Qc6 46.Qd4 Kh7 (46...Kf7 47.a4+–) 47.Qe5 Qc1 48.Kh2 Qa3 49.Qe3?? (better 49.Qc7 Kg8 50.Qd8 Qf8 51.Qh4+–) 49...Qd6+= 50.Kg1 (50.g4 Kg7+=) 50...Qf6 (50...Qd1!? 51.Kh2 Qd6=) 51.Qf3 Qg7 (51...c5 52.Qe4+=) 52.Qg4 c5 (better 52...Qe7 53.f5 g5+–) 53.Kh2?? (53.Qh4 Kg8+–) 53...c4 (better 53...Qf6=) 54.Qh4+– Kg8 55.Qg3 c3 56.Qd3 Kh7 57.Qc4 Qf6 58.Qc7 (58.g4 Qg7+–) 58...Kh6 (better 58...Kg8+–) 59.Qe5?? (better 59.g4 Qg7 60.g5 Kh7 61.Qc5+–) 59...g5 (better 59...Qe5 60.fe5 c2 61.e6–+) 60.Qg5 (60.Qf6 Kh7 61.fg5 c2 62.Qf7 Kh8 63.g6 c1Q 64.Qf8) 60...Qg5–+ 61.fg5 Kg5 62.h4 (62.Kg3 c2 63.f4 Kh5–+) 62...Kh6 (better 62...Kh4!? 63.Kg1–+) 63.Kh3 (63.Kh3 c2 64.g3–+). BeepBeepImAJeep (2740) – SwamiChaturanga (2470), lichess.org, 2019.

4.a4 ba4 5.Ra4 e6 6.Nf3 Bc6 7.b5 Bb7 (7...ab5 8.Ra8 Ba8 9.Bb5+=) 8.c4 (8.Nc3 ab5 9.Ra8 Ba8 10.Nb5 Nf6+–) 8...ab5 9.cb5 Ra4 10.Qa4 Nf6 11.Be2 (11.Bd3 d6+=) 11...Be7 (11...d5 12.Nc3+=) 12.0–0 0–0 13.Rc1 c5 (13...h6 14.Na3+–) 14.Qa7 (14.d4 d6 15.dc5 dc5+–) 14...Bf3 15.Bf3 d6 (15...d5 16.Bf6 gf6 17.d4+=) 16.b6 (16.Nc3 d5+–) 16...Nbd7 (16...d5 17.Bf6 gf6 18.Nc3+–) 17.b7+– d5 18.Na3 (18.Nc3 c4+–) 18...c4 19.Nb5 Bc5 20.Qa6 Nb8 21.Qa8 Qb6 22.Bf6 gf6 23.Rb1 Nc6 24.Qc8 (24.Nc3 Qc7 25.e4 d4+–) 24...Na7 (24...Bd6 25.e4 Nd4 26.Nc3+–) 25.Qc7+– Nb5 (25...Qc7 26.Nc7 Nc6 27.e4 de4 28.Be4+–) 26.Qb6 Bb6 27.Rb5 Ba7 28.Ra5 Bb8 29.Rc5 Kg7 30.g4 Ba7 (30...Re8 31.Rc8 Kf8 32.e4 de4 33.Be4+–) 31.Rc8 h6 (31...Rg8 32.h4+–) 32.Kg2 Bb8 (32...Rh8 33.e4 d4 34.Bd1+–) 33.e4 d4 (33...de4 34.Be4 Rg8 35.h4+–) 34.Rc4 e5 (34...Rg8 35.Rc8+–) 35.Rc8 Ba7 36.Be2 Bb8 37.Kf3 Bd6 38.Bb5 Bb8 (38...Rh8+–) 39.h3 Bd6 40.Ke2 (better 40.Be8 Rh8 41.Bf7+–) 40...Bb8 (40...Rh8 41.Kd3 h5+–) 41.Be8 Bd6 42.Kd3 Kg6 (42...f5 43.Kc4 fg4 44.hg4 f5+–) 43.Kc4 Kg5 44.Kd5 Re8 45.Re8 Bc7 46.Kc6 Ba5 47.b8Q Bd2 48.Qb3 Be1 (48...Be3 49.Qf7 Bf2 50.Rf8 Kf4 51.Qf6 Ke3 52.Qf2 Kd3 53.Rf3 Kc4 54.Qc2 Kb4 55.Qc5 Ka4 56.Qb5) 49.Qf7 Bf2 1–0. GuestSHNL – GuestGXRQ, freechess.org, 2020.

4.a4 ba4 5.Nf3 d6 6.Be2 Nd7 7.Ra4 Nb6 8.Ra5 e5 9.0–0 Nf6 10.c4 Be7 11.c5 Bf3 (11...dc5!? 12.bc5 e4+–) 12.Bf3+– (12.cb6?! Be2 13.Qe2 cb6 14.Ra6 0–0=) 12...Nc4 13.Qa4 Nd7 (13...Kf8!? 14.Ba8 Na5 15.Qa5 Qa8 16.Qc7 Nd5+–) 14.Ba8+– Nb2 15.Qa2 Qa8 (15...Nd3 16.Bd5 (16.Ra6 Nb4 17.Qa4 Na6 18.Qa6 Nc5 19.Bc6 Nd7=) 16...Nb4 17.Bf7 Kf8 18.Qc4 dc5 19.Be6+–) 16.Ra6 Qb7 17.c6 Qb4 18.cd7 Kd7 19.Ra7 Rb8 20.Qf7 Qb6 21.Ra1 Nc4 (21...Qb3 22.Qg7 Qg8 23.Qg8 Rg8+–) 22.Qc4 Qb2 (22...Qb3 23.Qg4 Qe6 24.Qa4 Kd8 25.Nc3+–) 23.Nc3 Qd2 (23...Qb4 24.Qd3 Qh4+–) 24.Ra7 Bd8 25.Qf7 Kc6 26.Qe8 Kc5 27.Ne4 (27.Ne4 Kd5 28.Nd2 Rb4 29.Qf7 Kc6 30.Rc1 Kb6 31.Qa2 Rc4 32.Rc4 d5 33.Qa5; 27.Ra5 Kc4 28.Qc6 Kd3 29.Rd5 Kc2 30.Rd2 Kd2 31.Ne4 Kd3 32.Rd1 Ke2 33.Nc3) 1–0. onur604 (2320) – Steinbron (2095), lichess.org, 2020.

4.a4 c6 5.ab5 cb5 6.Ne2 Nf6 7.Nf4 (7.Bf6 ef6 8.c3 a5=) 7...d6 (7...e5 8.Be5 Nc6 9.Bb2 Nb4 10.c4=) 8.Be2 (better 8.Bf6!? gf6 9.d4=) 8...e5=+ 9.Nh5 (9.Bf3 Qc7=+) 9...Nc6 (9...Nh5!? 10.Bh5 Bg2–/+) 10.Nf6= Qf6 11.0–0 (11.Bf3 Qh4=) 11...Be7 (11...Nb4 12.d3–/+) 12.f4 (12.Bf3 0–0+=) 12...0–0 (12...Nb4 13.fe5 Qg6 14.Bf3 Bf3 15.Qf3=+) 13.fe5 (13.Bf3 Qh4+=) 13...Qg6 (13...Qg5 14.Bf3=) 14.ed6 (14.Bd3 Qh6 15.Be4 de5=) 14...Bd6 (14...Nb4 15.Bf3 Bf3 16.Qf3 Bd6 17.Na3=+) 15.Bg4 (15.Bf3 Bb4 16.Nc3 Bd6=) 15...Rad8 (15...Nb4 16.Na3=+) 16.Bh3 (16.c3!?=) 16...Nb4=+ 17.Kh1? (17.Na3 Rfe8 18.Rf2 Be4=+) 17...Nd5?? (better 17...Qc2 18.Qc2 Nc2–+) 18.Bd4=+ Nb4 19.Na3 (19.Bb2 Qc2 20.Qc2 Nc2–+) 19...Be4 (19...Bd5 20.Rf2–/+) 20.d3=+ Bb7 21.Bf5?? (21.Qe2 Nc6 22.Bb6 Rde8=+) 21...Qh6 (21...Qg2) 22.Bh3?? (better 22.h3!?=+) 22...Nc6 (22...Qh3! 23.Bg7 Qg2) 23.Bg7? (better 23.Bb6 Rb8 24.e4–+) 23...Kg7–+ 24.Qg4 Qg6 (24...Kh8 25.Qf3–+) 25.Qe2 Rde8 (25...Qg5 26.Rf5 Qe7 27.Rh5–+) 26.e4 Nd4 (26...Qg5 27.Rf5 Qe7 28.Rh5–+) 27.Qd2 (27.Qd1 Bb4 28.Nb1 Qc6–+) 27...Re5 (27...Qh5 28.Qf2 Qe5 29.Qg3 Qg3 30.hg3–+) 28.Nb1? (28.Qc3 Bc5 29.Qb2–+) 28...Rh5 29.Rg1 (29.Ra2 f5 30.Qe3 Bc5–+) 29...Be5 (29...f5 30.Qc3 Qf6 31.Nd2–+) 30.Nc3 (30.Ra3 f5 31.c3 Bh2–+) 30...Rc8 31.Raf1 (31.Rac1 Qh6 32.Nb1–+) 31...b4 32.Qd1 bc3 (better 32...Rc3 33.Rf2 Bc8–+) 33.g3 (33.Rf2–+) 33...Rh3 34.Kg2 Rh6 35.Rf2 Rc6 (better 35...f5 36.Qb1 Bc6–+) 36.Rgf1 Rf6 (36...Rh2 37.Kh2 Qg3 38.Kh1 Rh6 39.Qh5 Rh5 40.Rh2 Rh2) 37.Rf6 Bf6 (37...Rh2 38.Kh2 Qg3 39.Kh1 Qh2) 38.Qa1 Qg4 (38...Be4 39.de4 Qe4 40.Kg1 Ne2 41.Kf2 Nf4 42.gf4 Rh2 43.Kg1 Qg2) 39.Qc3 Qe2 (39...Qh3 40.Kf2 Qh2 41.Ke3 Qe2 42.Kf4 Ne6 43.Kf5 Qh5) 40.Rf2 Rh2! 41.Kh2 (41.Kh2 Qf2 Mate attack) 41...Qf2 42.Kh3 Qf1 43.Kg4 h5! 44.Kh5 (44.Kh5 Qh3 Mate attack) 44...Qf3 (44...Qh3) 45.g4 Qh3 (45...Qh1) 0–1. Akrapovik (1670) – pialpha (1790), lichess.org, 2020.

4.a4 Nc6 5.ab5 ab5 6.Ra8 Qa8 7.Bb5 Nb4=.

4.a4 e6 5.ab5 ab5 6.Nf3 (6.Ra8 Ba8 7.Na3 A) < 7...Bb4 8.Bg7 (8.Nb5?! Nf6+=) 8...Bg2 9.Qg4 (9.Bh8?! Bh1 10.Nb5 Nc6+=; 9.Bg2?! Qg5 10.Bh8 Qg2+–) 9...Bd2 10.Kd2 Bh1 11.Bh8+–; B) 7...Na6+=) 6...Ra1 (6...Bb4?? 7.Ra8 Nf6 8.Bf6 gf6 9.Ra2+–) 7.Ba1 Nf6 (7...Bb4?? 8.Bg7 (8.Bb5?! Nf6=) 8...Nf6 9.Bh8+–) 8.Bb5 Bb4 9.0–0 0–0 10.c3 Bd6 11.d4 (11.d3 Ng4 12.e4 f5=) 11...Be4 (11...Ng4 12.g3=+) 12.Bd3 (12.Nbd2 Bf5=) 12...c5 (12...Be7 13.c4=) 13.Be4 Ne4 14.Qc2 f5 15.Nbd2 Nf6 (15...Nd2 16.Qd2 c4 17.Bb2=) 16.Nc4 (16.c4 Nc6=) 16...Be7 17.Nfd2 (17.Rb1 Qc7=) 17...d5=+ 18.Ne5 c4 19.Ndf3 (19.Bb2 Qc7=+) 19...Nbd7 (19...Bd6 20.Bb2=+) 20.Nc6 Qe8 21.Rb1 Ne4 22.Rb7 (22.Ne7 Qe7 23.Qa4 Ndf6=+) 22...Nd6 (22...Bd6 23.Qa2=+) 23.Ra7= Nb5 (23...Nc8 24.Ne7 Qe7 25.Rb7=) 24.Ra5 Nd6 25.Qa4 (25.Bb2 Ne4=) 25...Nb6 26.Ne7 Qe7 27.Qa3 Rb8 28.h3 Ndc8 (28...Nbc8 29.Ne5=+) 29.Qe7= Ne7 30.Ng5 (30.Ne5=) 30...Nbc8 (better is 30...Nc6!? 31.Rb5 e5=+) 31.Ne6+= Kf7 32.Ng5 Kg6 33.h4 (33.Nf3 Rb1 34.Kh2 Nb6+=) 33...h6 (33...Rb1 34.Kh2+=) 34.Ne6 Rb1 35.Kh2 Nd6 36.Nf4 Kf6? (better is 36...Kf7+=) 37.Ra6+– (37.Nd5?! Nd5 38.Rd5 Nb7=) 37...Kf7 38.Ra2?? (better is 38.Rd6 Ra1 39.Nd5 Nd5 40.Rd5+–) 38...g5= 39.hg5 hg5 40.Nh3 (40.Nh5 Ne4 41.Ng3 Nf6=) 40...g4 41.Nf4 (41.Ng5 Kf6 42.Nh7 Kg7=) 41…Ne4 =+. Andre,Karl – Wartig,Wolfgang, corr (year?).

4.a4 e6 5.Nf3 Nc6 (5...Bb4?? 6.Bg7 (6.ab5?! Nf6=) 6...ba4 7.Bh8+–) 6.ab5 ab5 7.Bb5 Nb4 (7...Bb4?? 8.Ra8 (8.Bg7?! Ra1 9.Ba1 Nf6+–) 8...Qa8 9.Bg7+–) 8.Ra8 Qa8 9.0–0 Bf3 10.Qf3 Qf3 11.gf3 Nc2 (11...c6 12.Ba4=) 12.Rc1+= Nb4?? (better 12...c6 13.Rc2 cb5 14.Rc8 Ke7 15.Ba3 d6+=) 13.Rc7+– Nf6 (13...Ne7 14.Rd7 Nec6 15.Rc7+–) 14.Rc8 Ke7 15.Ba3 Nfd5 16.e4 Kf6 (16...d6+–) 17.ed5 ed5 (17...Nd5 18.Rf8 Rf8 19.Bf8+–) 18.Rf8! Rf8 19.Bb4 Rb8 20.Na3 Ke6 21.Bc3 h5 22.Bg7 (22.f4 g6+–) 22...f6?? (better 22...Rg8+–) 23.Bh6+– h4 24.Kg2 Ra8 (24...h3 25.Kg3 Rg8 26.Kh4+–) 25.Nc2 Ra2 (25...Ke5 26.Kh3+–) 26.Bd3 1–0. b4_Bb2 (1675) – gabrielma29 (1705), lichess.org, 2019.

4.a4 f6 5.ab5+– ab5 6.Ra8 Ba8 7.Nf3 (7.Qh5 g6 8.Qb5 Nc6+–) 7...c6 8.c4 (8.d4 e6 9.c3 f5+=) 8...bc4 9.Bc4 (better 9.Qa4 Bb7 10.Bc4+=) 9...g5?? (better 9...d5 10.Be2 e5=) 10.Ng5!+– fg5 (10...fg5 11.Qh5) 11.Qh5 1–0. GuestVMZB – GuestWWLR, freechess.org, 2018.

4.c4 bc4 5.f3 Nc6 6.a3 d5 7.d3 cd3 8.Bd3 e6 9.Nh3 h6 (9...Qh4 10.Nf2=+) 10.Nc3 (10.0–0 Nf6=) 10...Nf6 11.Nf4 (11.Na4 e5=+) 11...Bd6–/+ 12.Nfe2 (12.0–0 d4 13.Ne4 de3 14.Nf6 gf6–/+) 12...Ne5 13.Nd4 Nd3 14.Qd3 c6 15.Na4 0–0 16.Ne2 (16.Rc1 a5 17.Nc5 Bc5 18.Rc5 ab4 19.ab4 Nd7–/+) 16...Qc7 (16...a5!? 17.Nc5 Bc5 18.bc5 Ba6–/+) 17.Bf6=+ gf6 18.g3 (18.Rc1 a5 19.Nc5 ab4 20.ab4 Rfb8=+) 18...f5 (18...a5 19.Qd4–/+) 19.0–0 f6 (19...a5!? 20.Nc5 Rfb8=+) 20.Nd4= Bc8 (20...Qe7 21.Nc5 Bc5 22.bc5=) 21.Rac1 Bd7 22.Nc5 Bc5 23.Rc5 e5 24.Nc6 Bc6= 25.Rfc1 Bb5 26.Rc7? Bd3–+ 27.Rd7 Bc4 28.e4 fe4 29.fe4 Rfd8 30.Rc7 Bd3 31.ed5 Rd5 32.h3 e4 33.Rc8 Rc8 34.Rc8 Kf7 35.g4 e3 36.Rc1 e2 (37.Kf2 f5–+) 0–1. dugmak – kingsknight59, ChessWorld.net, 2005.

4.c4 bc4 5.Nf3 d5 =+.

4.c4 bc4 5.Nf3 e6 6.Bc4 Nf6 7.a3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

4.c4 d6 5.cb5 ab5 6.Nf3 (6.Bb5!? c6 7.Be2+–) 6...c6= 7.Nc3 Nf6 8.Bd3 e5 9.Qe2 (9.0–0 Nbd7=) 9...Na6 10.Bb5? (better 10.a3=) 10...cb5–+ 11.Nb5? (better 11.Qb5 Qd7 12.Qd7 Nd7 13.a3–+) 11...Nb4 12.Rc1 (12.Qc4 Na6–+) 12...Rc8 (12...Ra2!? 13.Bc3 Nc2 14.Kd1–+) 13.0–0 (13.a3 Rc1 14.Bc1 Qc8–+) 13...Be7 (13...Na2!? 14.Rc8 Qc8 15.Ba3–+) 14.a3 Bf3 15.Qf3 (15.gf3 Nc6–+) 15...Nbd5 (15...Nd3!? 16.Rc8 Qc8 17.Bc3–+) 16.Rc8 (16.e4 Nb6–+) 16...Qc8 17.Rc1 Qd7 18.e4?? (18.a4 0–0–+) 18...Nf4 (better 18...Qb5 19.Rc2 Nf4–+) 19.Nc7 Kf8 20.Nd5 (20.Na6–+) 20...N4d5 21.ed5 g6 22.Rc6 (22.d4 e4 23.Qe3 Kg7–+) 22...Qb7 23.Bc3 (23.Rc2–+) 23…Qb1 (23...Qb1 24.Qd1 Qd1) 0–1. aravind555 (1625) – Msuwaid (1630), lichess.org, 2018.

4.c4 Nf6 5.Nf3 bc4 6.Bc4 e6 7.a3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

4.Ne2 e6 5.Nf4 c5 6.bc5+= Bc5?? (better 6...Nf6+=) 7.Bg7+– Ne7 8.Bh8 Nf5 9.Qh5 Nc6 (9...Qh4 10.Qh4 Nh4 11.Nc3+–) 10.Qh7 Nb4 11.Bd3 Nd3 12.cd3 (12.Nd3 Bf8+–) 12...Qa5 (12...Qh4 13.Qh4 Nh4 14.e4+–) 13.Bf6 Bf8 14.Nc3 (14.Ng6 Qc7 15.Qg8 Qc5+–) 14...Qb4 (14...Ne7 15.Ne4 Be4 16.de4+–) 15.0–0 (15.Ng6 d5+–) 15...Qd6 (15...Rb8 16.e4 Ne7 17.Nh5+–) 16.Rac1 (better 16.Ng6 e5 17.Qg8 Nh6 18.Qf8 Qf8 19.Nf8 Kf8 20.Be5 Ke7+–) 16...e5 (16...Ne7 17.Ne4 Be4 18.de4+–) 17.Nh5 (17.Qf5 ef4 18.ef4 Bh6 19.Rfe1 Kf8 20.Be7 Kg8 21.Bd6 Bg7+–) 17...Qc6 (17...b4 18.Ne4 Qd3 19.Nc5+–) 18.Ne4 d5 19.Rc6 (19.Rc6 Kd7 20.Qf7 Kc6 21.Be5 Rc8 22.Qe6 Bd6 23.Nd6 Nd4 24.Bd4 Kc7 25.Qe7 Kc6 26.Rc1) 1–0. Akrapovik (1625) – Sarah2000 (1615), lichess.org, 2020.

4.Nf3 Bf3 5.Qf3 Nc6 6.a3 a5? (6...e6 7.c4 bc4 8.Bc4+/–) 7.ba5 (better is 7.Bb5 Na7 8.Be2+–) 7...Ra5+= 8.Nc3 b4 9.ab4 Ra1 10.Ba1 e5? (10...Nb4 11.Bc4 Nf6 12.0–0 Nc2 13.Nb5+=) 11.Be2 Bb4 12.0–0 h5 13.d3 g5 14.Nd5 Be7 15.e4 g4 16.Qe3 f6 17.f4 ef4 18.Qf4 Nd4?? 19.Bd1 Bd6 20.Nf6 Nf6+/– 21.Qf6 Nf3?? 22.Bf3 Qf6 23.Bf6 Rf8 24.Bd1 g3 25.Bh5 Rf7 26.Bh4 gh2 27.Kh1 (27.Kh1 Be5 28.Rf7+–) 1–0. Fournier,Frederic (1615) – Nesssss (1640), Active (6/0), 2004.

4.Nf3 h6 5.c4+= bc4 6.Bc4 d5 7.Be2 e6 8.a3 Nc6 9.d3 Be7 (better is 9...Nf6!?+=) 10.Bg7+– Rh7 11.Bb2 f6 12.Nbd2 Qd7 13.0–0 0–0–0 (13...Rg7 14.Rc1+–) 14.Rc1 Kb8 15.Nb3 e5 16.Nc5 Bc5 17.bc5 (17.Rc5 Rg7+–) 17...d4 18.e4 h5 (18...Rg7 19.Rb1+/–) 19.Nh4 Qf7 20.g3 Na5 21.Rb1 c6?? (better is 21...Ne7+–) 22.Bc1 Ka8 23.Bd2 Qc7 (23...Nc4 24.dc4 Rd7 25.Qb3+–) 24.Qe1 (24.Qa4 Rb8+–) 24...Re8 (24...Nc4 25.dc4 Qf7 26.Qd1+–) 25.Ba5 Qf7 26.Rb6 Nh6 27.Bd2 Ng4 28.Qb1 Rb8 29.Qb2 f5 30.Nf5 h4 31.Bg4 hg3 32.fg3 Qg6 33.Bf3 Rhh8 34.Nd6 Qh7 35.Ba5 Ka7 36.Rb1 Ba8 37.Rb8 Qh2 38.Qh2 Rh2 (38...Rb8 39.Qh7 Bb7 40.Rb7 Rb7 41.Qb7) 1–0. Fournier,Frederic –NN, jeu.europe–echecs.com, 2013.

4.f4 e6 5.Nf3 Nf6 6.a3 d6 7.c4 bc4 8.Bc4 Nbd7 9.0–0 c5 10.Nc3 cb4 11.ab4 d5 12.Ba2 Bb4 13.Qa4 a5 14.Ba3 Qb6 15.Rfb1 Bc6 16.Qc2 Qc5 17.Bb2 a4 18.f5 0–0 19.fe6 fe6 20.Nd4 Rfe8 21.Rf1 Bb7 22.Rab1 a3 23.Ba1 Ba6 24.Rf4 Bc3 25.Bc3 e5 26.Nb3 Qe7 27.Rh4 Ne4 28.Re4 de4 29.Nc5 Kh8 30.Ne4 Rf8 31.h3 Rab8 32.Rb8 Rb8 33.d4 ed4 34.Bd4 Rc8 35.Nc3 Nf6 36.Kh1 Bb7 37.Qb1 Qd7 38.Kg1 Qc6 39.Qf1 Rf8 40.Qf2 Re8 41.Qg3 Qd7 42.Qh4 Ne4 43.Ne2 Bd5 0–1. Ruether – Deneuville, corr SOK–96–112 1996.

4.h4 Nf6 5.h5 e6 6.a4 Bb4 7.ab5 0–0 8.ba6 Na6 9.h6 g6 10.f4 Nh5 11.c3 Be7 12.Ba3 Bh4 0–1. LilBear – Wall,Bill, internet, 2000.

4.Nf3 Nc6

5.a3 a5 6.Bb5 Na7 7.Be2 a4 8.0–0 h5 9.Ne1 e6 10.Bf3 (10.Bh5?! Qh4 11.Bf7 Kf7=) 10...c6 11.Nd3 (11.Bh5?! Qh4 12.g4 c5+/–) 11...Ne7 12.Nc5 Qc7 13.Nb7 Qb7 14.Nc3 Nb5 15.Nb5 Qb5 16.Re1 h4 17.g3 (better is 17.h3!?+–) 17...hg3+/– 18.fg3 Rb8 19.Qe2 Qe2 20.Re2 c5 21.Bc3 Nd5 22.Bd5 ed5 23.bc5 Bc5 24.Bg7 Rh3 25.d4 Bd6 (25...Be7 26.e4 de4 27.Re4+–) 26.Be5 (better is 26.e4+–) 26...Be5 27.de5 Rc8 28.Rc1 (better is 28.Rd1!?+–) 28...Rc3+/– 29.Kg2 Rh5 30.Ra1 Ke7 (30...Re5 31.Kf2+=) 31.g4 (better is 31.Rd1!?+/–) 31...Re5+= 32.Kf3 Ke6 33.h4 Kf6 34.Ra2 (better is 34.h5!?+=) ½–½. valpa – footyhead, HCL–C2013 playchess.de, 2003.

5.a3 d5 6.d4 g6 (6...e6 7.c3+=) 7.Nbd2 Bg7 8.Bd3 e6 (8...Nf6 9.c3+=) 9.c3 Nf6 10.0–0 0–0 11.Re1 Re8 12.e4 (12.a4 ba4 13.Ra4 Nd7+=) 12...Ne7 (better is 12...e5!?=) 13.e5+/– Ne4 (13...Nh5 14.Nb3+/–) 14.Ne4 de4 15.Be4 Be4 16.Re4 Bh6 (16...a5 17.Re1+/–) 17.Bc1 Bc1 18.Rc1 Kg7 (18...a5 19.Qd3 Qd7 20.Rh4 ab4 21.ab4+/–) 19.Qd2 (19.c4 Qd7+–) 19...Nf5 20.g3 Qd5 21.Rce1 h6 22.Nh4 Nh4 23.Rh4 Rh8 24.Qf4 Qd8 25.Qf3 Qe7 26.Rf4 Qd7 27.Rd1+– c6 28.Qe4 Qd5+/– 29.Qf3 Rac8?? 30.Rf7 Kg8 31.Qf6 (31.Qf6 Qg2 32.Kg2 Rh7 33.Qg6 Rg7 34.Qg7) 1–0. Fournier,Frederic – Vinsot,Serge, Ch Club, 1998.

5.a3 d6 6.c4 e5 7.cb5 ab5 8.Bb5 Nge7 (8...Qd7 9.0–0+–) 9.0–0 Qd7 10.d4 (better is 10.Nc3 Qf5+–) 10...Ba6? (10...e4 11.Nfd2 d5+–) 11.Ba6 Ra6 12.b5 Rb6 13.bc6 Qc6 14.Bc3 g6 15.de5 Bg7 16.ed6 Bc3 17.de7 Ke7 18.Nc3 Qc3 19.Rc1 Qa3 20.Rc7 Kf6 21.Qd4 Ke6 22.Qe5 1–0. Ahrens,Gerhard (2235) – Tortoza,Carlos, CiF, 2007.

5.a3 d6 6.c4+= e5 (6...bc4 7.Bc4 e6 8.0–0+=) 7.Nc3 (7.cb5 Nb8+/–) 7...Nf6 (7...bc4!? 8.Bc4 Nf6+=) 8.cb5+/– Ne7 (8...ab5!? 9.Bb5 Be7+/–) 9.ba6+– Ba6? (9...Bc8 10.b5+–) 10.Ba6 (better is 10.Qa4 c6 11.Ba6+–) 10...Ra6 11.Qe2 Ra8 12.0–0 Nd7 13.d4 Ng6 14.Rfd1 Be7 15.de5 0–0 16.Ne4 Nge5 17.Ne5 de5 18.Be5! Qc8 19.Qg4?? Ne5–/+ 20.Qc8 Rfc8 21.b5 Ra3–+ 22.Rac1 Rb3 0–1. O'Harney,Robert – Dickson,David A, Brampton op, 2000.

5.a3 d6 6.c4 e5 7.Be2 Nf6 (7...e4 8.Nd4 Nd4 9.Bd4=) 8.0–0 (8.cb5 ab5 9.Bb5+–) 8...Ne4?? (8...e4!? 9.Ng5 bc4+=) 9.d3 (better 9.cb5 Nb8 10.d4+–) 9...Nf6+= 10.Nbd2 Qd7 (10...bc4 11.Nc4 Be7 12.Nh4+=) 11.Re1 (11.d4 e4 12.cb5 Nb4 13.ab4 ef3 14.Bf3 Qb5 15.Bb7 Qb7 16.Qa4 Nd7+–) 11...Na7 (11...bc4 12.Nc4 Be7 13.Qc2+=) 12.e4+– h5 (12...Be7 13.d4 ed4 14.e5 de5 15.Ne5+–) 13.Bf1 g6 (13...Be7 14.d4+–) 14.d4+– ed4? (14...Bg7 15.h3+–) 15.Bd4 (better 15.e5 Ng4 16.ed6 Kd8 17.Bd4+–) 15...Be7 16.e5 de5 17.Ne5?? (better 17.Ba7 e4 18.Bd4+–) 17...Qd4–+ 18.Qc2 0–0?? (18...Ng4 19.Ndf3 Qb6 20.Rad1 Bf3 21.Nf3–+) 19.Rad1? (better 19.Ng6 Bb4 20.ab4+–) 19...Bd6–+ 20.Ndf3 Qf4 21.g3 Qh6 22.c5 Be5 23.Ne5 Rae8 (23...Bd5 24.Nd7 Nd7 25.Rd5–+) 24.Bd3? (24.c6 Re5! 25.Re5 Nc6–/+) 24...Kg7 (24...Nc6!? 25.Qb2 Ne5 26.Re5–+) 25.Qc3 (25.c6 Ba8 26.Qc5–/+) 25...Bd5?? (better 25...Re6–+) 26.Nd7=+ Re1 (better 26...g5 27.Nf8 Kf8 28.Re8 Ne8=+) 27.Re1+– Rd8?? (better 27...g5 28.Re5 Kg8 29.Rg5 Qg5 30.Nf6 Kh8 31.Nd5 Qg7 32.Qg7 Kg7 33.Nc7 a5+–) 28.Qf6+– Kg8 (28...Kh7 29.Qd8 a5+–) 29.Qd8 Kh7 30.Nf6 (30.Re8 Qc1 31.Bf1 Qa1 32.Nf6 Kg7 33.Rg8 Kh6 34.h4 Qf1 35.Kf1 Bc4 36.Ke1 Nc6 37.Qf8) 30...Kg7+– 31.Nd5 Nc6 (31...Qg5 32.Qg5 h4 33.Qf6 Kh7 34.Qf7 Kh6 35.Qg6) 32.Qf6 Kh7 33.Qf7 Qg7 34.Qg7 (34.Bg6 Kh6 35.Qf4 Kg6 36.Re6 Kh7 37.Qf5 Kh8 38.Re8 Qg8 39.Qh5 Kg7 40.Qg5 Kh7 41.Nf6 Kh8 42.Qg8) 34…Kg7+– 1–0. alaindubleu (1725) – gregor2366, lichess.org, 2016.

5.a3 e6 6.c4 bc4 7.Bc4 a5 8.b5 Nb8 9.0–0 c6 10.Nc3 f5 11.g3 (11.Rb1 Nf6+/–) 11...d5 12.Bb3 Qb6 (12...Nf6 13.Ba4+=) 13.Ne5 (better is 13.Na4 Qd8 14.Nd4+=) 13...cb5? (better is 13...Nf6+=) 14.Qh5+– g6 15.Ng6! hg6 16.Qh8 Kf7?? (better is 16...Ne7+–) 17.Qh7 Bg7 (17...Ke8 18.Qg6 Kd7 19.Qg8 Na6+–) 18.Nd5! ed5 (18...Bd5 19.Qg7) 19.Qg7 (19...Ke8 20.Qg8 Ke7 21.Qg7 Ke8 22.Bf6+–) 1–0. Wall,Bill – Chapman,Joshua, Palm Bay, FL, 2004.

5.a3 e6 6.c4 bc4 7.Bc4 h5 8.0–0+– h4 9.h3 Nf6 10.d4 Bd6 11.Nc3 Be7 12.d5 ed5 13.Nd5 Bd6 (better 13...0–0+–) 14.Nf6 gf6 15.Qd5 (better 15.Ng5! fg5 16.Bh8+–) 15...Qe7+– 16.Rfd1 Ne5?? (better 16...Rb8 17.Qd3 a5+–) 17.Qb7+– Nf3 (17...Rd8 18.Ba6 Nf3 19.Qf3 Be5+–) 18.Qf3 c6 19.Bf6 Qf8 20.Bh8 0–0–0 (20...Qh8 21.Rac1 Qf8 22.Rd6 Qd6 23.Qf7 Kd8 24.Qg8 Ke7 25.Qa8+–) 21.Bf6 1–0. GuestKVNL – GuestFNDR, freechess.org, 2017.

5.a3+= e6 6.Be2 Nf6= 7.0–0 Be7 8.c4 d6 (8...bc4 9.Bc4 0–0 10.d3=) 9.d4 (9.cb5 ab5 10.Bb5 0–0+/–) 9...0–0 (9...bc4 10.Bc4 0–0 11.Nc3+=) 10.c5 (better is 10.cb5!? ab5 11.Bb5+/–) 10...dc5 (10...Qd7 11.Nc3=) 11.dc5 Qd1 (11...Nd5 12.e4 Nf4 13.Nc3=) 12.Rd1 Rfd8 13.Nc3 Rd1 (13...e5 14.Bd3=) 14.Rd1+= Rd8 15.Rd8 Bd8 16.h3 (16.Bd3 e5+=) 16...Ne7 (16...Be7 17.e4+=) 17.Nd4 (17.Ne5 Nfd5+=) 17...Ned5 (17...e5 18.Nf3 Nc6 19.Bd3=) 18.Nd5 (18.c6 Bc8+/–) 18...Nd5 (18...Bd5 19.c6+=) 19.e4 (19.Bd3 Bf6+=) 19...Nf4= 20.Bf3 Nd3 21.Ba1 (21.Bc3 Bf6=) 21...Ne5 (21...e5 22.Nf5=) 22.Ne2 (22.Be2 Bf6 23.f4 Nc4+=) 22...Nf3 (22...Bf6 23.Kf1=) 23.gf3= f6 (23...Kf8 24.Be5=) 24.Nc3 (24.Nd4 Kf7+=) 24...c6 (24...g5 25.Bb2=) 25.f4 (25.e5 fe5 26.Ne4 Ba8=) 25...Bc7 26.Ne2 e5 27.f5 g6 28.f4 gf5 29.fe5 Be5 30.Be5+= fe5 31.ef5 Kf7 32.Kf2 Kf6 33.Ng3+/– Bc8 34.Ke3?? Bf5–/+ 35.h4 Bg6 36.Ne4? Kf5?? 37.Nd6 Ke6 38.Nc8 Kd5 39.Ne7+/– Kc4 40.Nc6 Kb3 41.Nb8 Ka3+= (42.Na6 Ka4+=). grain – taylor7, Live Game Caissa's Web, 2005.

5.a3 Nf6 6.c4 Na7 7.d4 Be4 (7...e6 8.Nc3+=) 8.Nbd2 c6 9.c5 d6 (9...Bf5 10.Be2+=) 10.Ne4+/– Ne4 11.Bd3 d5 12.0–0 g6 13.Be4 de4 14.Nd2 f5 15.d5! Rg8 (15...cd5 16.Bh8 Discovered attack; 15...Qd5 16.Bh8 Discovered attack) 16.dc6 Nc6 (16...e6+/–) 17.Qc2?? (better is 17.Qb3!? Qd2 A) 18.Qg8 Qb2 19.Rad1 Qf6+= (19...Qa3? 20.Qd5 Rb8 21.Qc6 Kf7 22.Qd7+–); B) 18.Rfd1+–) 17...Bg7 (17...Qd3 18.Qc1+=) 18.Rad1 Qc7 19.Nb3 Kf7 20.Bg7 Kg7 21.Qb2 (21.Nd4 Nd8+/–) 21...e5+= 22.Rd2 (22.Rd6 Rgd8 23.Rfd1 Kg8+/–) 22...Rad8= 23.Rfd1 Rd2 24.Rd2 Rd8 25.Kf1 Rd3 26.Nc1 Rd2 27.Qd2 Qd8 28.Ke2 f4 (28...Qd2!? 29.Kd2 Kf6=) 29.Nb3 Kf6 (29...f3 30.gf3 ef3 31.Kf3 Qf6 32.Kg2 Qg5 33.Kf1+/–) 30.Qd8 (30.ef4!? Qd2 31.Nd2+/–) 30...Nd8+= 31.ef4 (31.Nd2 Kf5+=) 31...ef4= 32.g3 g5 33.Kd2 Ke5 34.Kc2 Nc6 35.Kd2 h5 36.Kc3 fg3 37.hg3? h4–+ 38.gh4 gh4 39.Nd2 Kf4 40.Kc2 h3 41.Nf1 Kf3 42.Kd2 Kf2 43.Nh2 e3 44.Kd3 e2 45.Ng4 Kg3 46.Ke2 Kg4 47.Kf2 Kf4 48.Kg1 Ke3 0–1. Hal1958 – HOTSUN, playchess.de, 2005.

5.a3 Nf6 6.c4 bc4 7.Bc4 e6 8.0–0 Be7 9.Qc2 0–0 10.Nc3 Nb8 11.Rac1 Bf3 12.gf3 d5 13.Ba2 Bd6 14.Bb1 g6 15.Kg2 Nc6 16.Rh1 Ne5 17.h4 Nc4 18.Rcg1 Nb2 19.Qb2 Nd7 20.Kf1 Be5 (20...Ne5!? 21.f4 Nc4–/+) 21.Qc2 Bg7 22.h5 Qf6 23.Rh3 a5 24.hg6 hg6 25.b5 Rfc8 26.Ne2 (26.d4!?=) 26...Rab8=+ 27.a4 c6 28.bc6 Nf8 (28...Ne5 29.Nd4 Nc4 30.Nb5 Rc6 31.Ke2–/+) 29.Nd4 e5 30.Nb5 Rc6 31.Qb3 Rc1 32.Kg2 Rg1 33.Kg1 d4 34.Qc2 Qe6 35.Rh1 Rc8 36.Qb2 de3 37.fe3 e4! 38.Nd4 (38.Be4 Bb2) 38...ef3 39.Kf2? (better is 39.Ne6 Bb2 40.Nf4–/+) 39...Qg4 40.Rg1 Qh4 41.Kf3 Ne6 42.Qb7 Nd4 43.ed4 Qf6 44.Ke2? Re8 45.Kd1 Qd4 46.Rg2 Qa4 47.Bc2 Qf4 48.Rg1 Rd8 49.Kc1 Qd2 (50.Kb1 Qc3 51.Bd3 Qd3 52.Kc1 Qc3 53.Kb1 Qa1 54.Kc2 Qa2 55.Kc1 Bh6 56.Rg5 Bg5 0–1. Heindrich,Janos (2080) – Takacs,Tamas (1750), ch junior team Spatak II–Szarvas, 1998.

5.a3 g6?? 6.Bh8+– f6 7.d4 Nh6 8.d5 (8.c4 Nf7+–) 8...Na7 9.a4 (better 9.Be2+–) 9...e5 (9...Nf7 10.ab5 ab5+–) 10.de6! de6 (10...Bb4 11.c3 Be7 12.ab5 Nb5 13.ed7 Qd7 14.Qb3+–) 11.Qd8 Rd8 12.Bf6 Be7 (12...Bb4 13.c3 Be7 14.Be7 Ke7 15.ab5 Nb5 16.Ra5+–) 13.Be7 Ke7 14.ab5 Nb5 15.Bb5 (15.c4 Nd6+–) 15...ab5 16.Nc3 Bf3 17.gf3 c6 (17...Rb8 18.Ra7 Kd7 19.Ne4+–) 18.Ra6 Rc8 (18...Rd6 19.Ne4 Rd5 20.Rc6+–) 19.Ra7 Kf6 (19...Kf8 20.Ne4 Re8 21.Rh7+–) 20.Ke2 Nf5 (20...Ng8 21.Rg1 Ne7 22.Ne4 Kf7 23.Rd1+–) 21.Ne4 Ke5 22.Rd1 h5 23.f4 Ke4 24.f3 1–0. Janek – yxdjango, internet, 2017.

5.a4 ba4 6.Ra4 d6 7.b5 (7.d4 d5+=) 7...ab5 8.Bb5 Ra4 9.Ba4 Nf6 (9...e6 10.0–0+=) 10.0–0 (10.Bf6 ef6 11.Nd4 Qa8+–) 10...e5+= 11.d4 ed4 (better 11...e4!? 12.Nfd2 Be7+–) 12.ed4+– (12.Bd4?! Be7=) 12...Nd7 (12...Qa8 13.c4 Nd7 14.Bc6 Bc6 15.d5+–) 13.Re1 (better 13.Bc6 Bc6 14.Re1 Be7 15.d5+–) 13...Be7? (better 13...Ne7+–) 14.d5 Nb4 15.Qd4 (15.c4 0–0 16.Qb3 Nd5 17.Qb7 N5b6 18.Bd7 Nd7+–) 15...c5?? (better 15...Nd5 16.Qg7 Rf8+–) 16.Qg7 Rf8 17.Bf6 Nd5 18.Be7 (better 18.Bg5 N5b6 19.Bd7 Nd7 20.Be7 Qe7 21.Re7 Ke7+–) 18...Ne7 19.Ng5 (19.Qh7?! Bf3 20.gf3 Qa5+–) 19...Bd5 (19...Qc8+–) 20.Nh7 (20.Qh7?! Qa5 21.Bd7 Kd7+–) 20...Rg8 (20...Bc6 21.Bc6 Rh8 22.Qh8) 21.Nf6 (21.Qg8) 1–0. DEFFM – GuestSFFX, freechess.org, 2018.

5.a4 ba4 6.Ra4 Nf6 7.Be2 e6 8.0–0 (8.c3!?=) 8...Nb4 9.d4 (9.Na3 Bc5=+) 9...Nbd5 (9...Be7 10.Ba3 a5 11.Ne5–/+) 10.c4 Nb6 11.Ra1 d5 (11...Be7!?=+) 12.c5= Nc8 (12...Nbd7 13.Qc2 c6 14.Nc3=) 13.Qb3 Ra7 14.Ne5 (better 14.Ba6 Ba6 15.Ra6 Ra6 16.Qb5 Nd7 17.Qa6+=) 14...Nd7? (better 14...c6=) 15.c6+– Ne5 16.cb7 Nd6?? (16...Nd7 17.bc8N Qc8+–) 17.b8Q (17.b8Q Nc6 18.Qd8 Kd8 19.Ba6+–) 1–0. DEFFM – GuestZSHZ, freechess.org, 2018.

5.a4 Nb4 6.c3 Bf3 7.gf3=.

5.c4 bc4 6.Bc4 Nb4?? (6...e6 7.a3 Nf6+=) 7.Qb3?? (better 7.Bf7 Kf7 8.Ne5 Kf6 9.Nc6 Kf7 10.Nd8 Rd8 11.0–0+–) 7...e6–/+ 8.a3 Nc6 (8...Bf3!? 9.ab4 Bb7=+) 9.Qb7= Rb8 10.Qa6 Rb2 11.0–0 Nf6 12.Bb5 Nb8 13.Qb7?? (better 13.Qa4=) 13...c6–+ 14.Nc3 cb5 (14...Be7 15.a4 0–0 16.Rab1 Rb1 17.Rb1 cb5 18.ab5–+) 15.Nb5 (better 15.Rfc1 Ba3 16.Nd1=+) 15...Be7?? (better 15...Ke7!?–/+) 16.Nd6 Bd6 17.Qb2 0–0 18.Nd4 Be5 19.Rac1? (19.f4 Bd4 20.Qd4 Nc6=+) 19...Nd5 (better 19...Nc6!?–+) 20.Qb4?? (better 20.f4 Bd4 21.Qd4=+) 20…Nb4–+ (20...Nb4 21.ab4 Bd4 22.ed4 Nc6–+) 0–1. aravind555 (1795) – AlexandrKushnirenko (1800), lichess.org, 2020.

4.Nf3 d5

5.a4 ba4 6.c3 e6 7.Qa4 Bc6 8.Qc2 Nf6 9.d3 Bd6 10.Nbd2 0–0 11.Be2 Nbd7 12.Nb3 h6 (12...e5 13.Na5 Bb5 14.Nb7+=) 13.Na5+/– Nb8 14.0–0 Re8 15.c4 (15.Nd4 Qd7+/–) 15...dc4+= 16.dc4 (better is 16.Qc4 Bb5 17.Qh4+=) 16...e5?? (better is 16...Bb4 17.Rfd1 Qe7=) 17.c5+– (17.Nc6?! Nc6 18.c5 Be7+/–) 17...e4? (better is 17...Be4 18.Qa4 Bf8 19.Ne5 Nfd7+–) 18.cd6 (18.Nc6 Nc6 19.cd6 ef3 20.dc7 Qe7 21.Bf3 Nb4+–) 18...ef3 19.dc7 Qc7 20.Bf3 Re6 21.Nc6 Nc6 22.b5! Rc8 23.bc6 a5 24.Rfd1 Qb6 25.Bf6 Rf6 26.Rac1 g6 27.Rd7 Kg7 28.Qc3 g5 29.Rd6 Rc6 30.Qf6 (30...Kf8 31.Rdc6 Qb5 32.Rc8 Qe8 33.Qh8 Ke7 34.Qe5 Kf8 35.Re8 1–0. pcmvr (2110) – iboyd (1950), net–chess.com, 2006.

5.a4 ba4 6.c4 Nf6+–.

5.a4 ba4 6.Be2 e6 7.0–0 Nf6 8.c4 dc4 9.Na3 Bb4? (better 9...Be7!?+–) 10.Qa4+– Nc6 11.Ne5 Qd5?? (better 11...Ba3 12.Ba3 Nd5+–) 12.Bf3 Qa5 (12...Ne4 13.Nc6 Bc6 14.Qb4 c3 15.Bc3 a5+–) 13.Bc6 Bc6 (13...Nd7 14.Bd7 Ke7 15.Qa5 Ba5 16.Bc6+–) 14.Qc6 (14.Qc6 Ke7 15.Nac4+–) 1–0. GuestCRKV – GuestZTMV, freechess.org, 2020.

5.a4 c6 6.ab5 ab5 7.Ra8 Ba8 8.d3 (8.Be2 e6+=) 8...Na6 9.c3 e6 10.Nbd2 Nb4?? (better 10...Nf6=) 11.cb4+– c5? (11...Nf6 12.Qb3 Bd6+–) 12.bc5 Qc7 (12...Qa5 13.d4+–) 13.Nb3 (better 13.Qa1!? Qd8+–) 13...Ne7 (13...Bc6 14.Qa1 f6 15.Nfd4+–) 14.Be2 1–0. GuestKVMJ – Discanto, freechess.org, 2017.

5.a4 Qd6+=.

5.a4 Nd7 6.ab5+– ab5 7.Ra8 Ba8 8.Bb5 c6 9.Be2 Qb6 10.c3 e5 11.0–0 Bd6 12.d3 Ngf6 13.Nbd2 0–0 14.Qc2 Rb8 15.Ra1 h6 16.e4 (16.Ba3 Bb7+–) 16...Ng4 (better 16...c5+=) 17.h3?? (better 17.d4 ed4 18.Nd4 Bh2 19.Kh1+=) 17...Qf2–+ 18.Kh1 Ne3 (18...Qe2?! 19.hg4 c5 20.g5 hg5 21.Qa4–+) 19.Bf1 Nc2 (19...Nc2 20.Rb1 c5–+) 0–1. GuestMTMC – GuestHZFQ, freechess.org, 2017.

5.Nc3 e6 6.a3 (6.a4 Nf6=) 6...c5= 7.bc5 Bc5 8.Nb5 Nf6?? (8...ab5 9.Bg7) 9.Nbd4 0–0 10.Be2 Nc6 11.Nc6 Bc6 12.0–0 Qe7 13.c4 (13.Nd4 Rfc8+/–) 13...dc4 14.Bc4 Rfb8 15.Qc2 (15.Be5 Rc8+=) 15...Ra7 (15...Bf3 16.gf3 Nd5 17.f4+=) 16.Bd3 h6 (16...Bf3 17.Bf6 gf6 18.Bh7 Kh8 19.gf3=+) 17.Bf6+/– gf6 18.Rfc1 Bf3 19.gf3 (19.Qc5 Qc5 20.Rc5 Rb3+–) 19...Rc8 (better is 19...Ba3!? 20.Rcb1 Rb1 21.Rb1 a5=) 20.Qa4+= Qb7 (20...Qd6!? 21.Qg4 Kh8+=) 21.Qg4+– Kh8 22.Qh3 f5? 23.Qh6+– Kg8 24.Qf4 Kf8 25.Kf1 Ke7 26.Ke2 Bd6 27.Qg5 Kd7 28.Qf6 Rf8 29.Rab1 Qd5 30.a4 Bh2 31.f4 Qg2?? 32.Rb4 Qg4?? 33.Ke1 Qg1 34.Bf1 (34...Qh1 35.Rd4 Qd5 36.Rd5 ed5 37.Qc6 Ke7 38.Qc5 Ke6 39.Qb6 Ke7 40.Qb4 Kd7 41.Qf8 Bf4 42.Qf7 Kd6 43.Qa7 a5 44.Qc7 Ke6 45.Rc6 Bd6 46.Rd6 Ke5 47.Qe7 1–0. Korner – Schiedeck, corr, 1990.

4.Nf3 d6

5.a4 c6 6.c4 bc4 7.Bc4 Nf6 8.Qc2 Nbd7 9.d4 e6 10.Bd3 d5 11.Bc3 g6 12.Nbd2 Bg7 13.h4 0–0 14.Ke2 Re8 15.h5 Nh5 16.Rh5 gh5 17.Bh7 Kf8 18.Rh1 Qf6 19.Rh5 Ke7 20.Ne5 Rh8?? (20...Kd8 21.Nd7 Kd7 22.Nb3+=) 21.Ndf3 (better is 21.Ng4+–) 21...Bh6 22.Nd7 Kd7 23.Ne5 Ke7 24.b5 cb5?? (better is 24...ab5 25.Bb4 Ke8 26.ab5 Qg7= (26...cb5 27.Qc7 Bc8 28.Rh6 Qf2 29.Kf2 Ra2 30.Kf3 Rf2 31.Kf2 Rh7 32.Qc8)) 25.Bb4+– Kd8 26.Rh6! Rc8 (26...Qh6 27.Nf7) 27.Qc8! Kc8 28.Rf6 Rh7 29.Rf7 Rh1 30.ab5 ab5 31.Bd6 Ba6 32.Rc7 Kd8+– 33.Nc6 Ke8 34.Nb4 (34...Ra1 35.Re7 Kf8 36.Bc5+–; better is 34.Re7!? Kf8 35.Rh7 Ke8 36.Rh1 Kd7+–) 1–0. Karlsen,Jan M – Jervan,Morten, NOR–ch qual Gausdal, 1999.

5.a4 Bc6 6.ab5+– ab5 7.Ra8 Ba8 8.Bb5 c6 9.Be2 Qc8 10.0–0 e5 11.Ne1 f5 12.f4 e4 13.d3 d5 14.de4 de4 (14...fe4 15.Bh5 Kd8 16.c4+–) 15.Bh5 g6?? (better is 15...Ke7+–) 16.Bh8 Nh6 (16...Qd7 17.Rf2 Bb4 18.c3 Qd1 19.Bd1+–) 17.Be2 c5 (17...Bb4 18.c3 Be7 19.Nd2+–) 18.b5 Nf7 19.Bb2 g5 (19...Qe6 20.Nd2+–) 20.fg5 Ng5 (20...c4 21.Bh5 Bc5 22.Bd4+–) 21.Bh5 Ke7 22.Be5 Nd7 (22...Nf7 23.Bf7 Kf7 24.Qh5 Ke7 25.Bb8 Kd8+–) 23.Qd6 Kd8 24.Bf6 Be7 25.Be7 1–0. Kazimierski,Tomasz – Alexandre, playchess.de, 2001.

5.a4 Nd7 6.ab5+– Ngf6? (better 6...ab5 7.Ra8 Qa8 8.Bb5 e5+–) 7.ba6+– Bf3 (7...Bc8 8.b5+–) 8.Qf3 e5 9.Nc3 Be7 (9...Ra7 10.Nb5 e4 11.Qf5+–) 10.a7 (10.Bb5 0–0 11.Bc6 e4 12.Ne4 Ra7+–) 10...0–0 11.Bb5 Nb6 (11...c5 12.bc5 Nc5 13.Bc6+–) 12.Bc6 Nc4 (12...d5 13.Nb5 Bb4 14.Be5 Bd2 15.Kd1+– (15.Kd2?! Nc4 16.Kc1 Ne5 17.Ba8 Qd7+–)) 13.Ba8 Qa8 14.Qa8 Ra8 15.Nb5 Ne4 (15...Ne8 16.Bc3 c6+–) 16.Nc7 Ncd2 (16...Ra7 17.Ra7 Nb2 18.Ra8 Bf8+–) 17.Na8 Bh4 18.Nc7 Bg5 19.a8Q (19.a8Q Bd8 20.Qd8) 1–0. GuestCJGH – GuestZXGX, freechess.org, 2018.

5.c4 bc4 6.Bc4 e5 7.0–0 Be7 8.a4 (8.a3 Nf6+=) 8...Nf6= 9.d3 0–0 10.h3 Nbd7 11.Nbd2 Re8 12.e4 (better is 12.b5=) 12...Nf8 (better is 12...d5 13.ed5 Bb4+=) 13.Qb3+= Ne6? (better is 13...d5 14.ed5 Bd6+=) 14.Be6+– fe6 15.Qe6 (15.Qe6 Kh8 16.Ng5+–) 1–0. Hal1958 – Jmcerna, playchess.de, 2004.

5.d4 Nc6 6.a3 e5 7.de5 de5 8.Qd8 Rd8 9.Ne5 (9.Be5?! Ne5 10.Ne5 c5 11.bc5 Bc5+=) 9...Ne5 10.Be5 c5 11.bc5 Bc5?? (better is 11...Rc8+/–) 12.Bg7+– b4 (12...f6 13.Bh8 Kf7 14.c4+–) 13.Bh8 ba3 14.Na3 Bb4 (14...Ke7 15.Be5+–) 15.c3 f6 16.cb4 Ne7 17.Bf6 Nd5 18.Bd8 Nb4 19.Ba5 (19.Ba5 Nd5 20.Rb1+–) 1–0. Fournier,Frederic – martinete, Active, 2008.

5.d4 Nf6 6.Nbd2 Nbd7 7.c4 Ne4 (better is 7...bc4!? 8.Nc4 e6+=) 8.cb5+– ab5 9.Bb5 c6 10.Bd3 Nd2 11.Qd2 e6 12.a4 Be7 13.a5 Ba6 14.Ba6 Ra6 15.d5 0–0 16.dc6 Rc6 17.0–0 Qb8 18.a6 Qa7 (18...Rc4 19.a7 Qb7 20.b5+–) 19.Bd4 Qa8 (19...Qb8 20.a7 Qb7 21.b5+–) 20.b5 Rcc8 21.b6 Qe4 22.b7 Rb8 23.Qb4 f6 24.Rfc1 Nc5 25.Bc5 Qd5 26.Ba7 h6 27.Bb8 Rb8 28.a7 Rb7 29.a8Q Kh7 30.Qbb7 Qb7 31.Qb7 Bf8 32.Qf7 e5 33.Nh4 d5 34.Rc7 d4 35.Qf8 (35.Qf8 de3 36.Qg7 1–0. Rosner,Dirk (2175) – Tortoza,Carlos, CiF, 2007.

5.Be2 e5 6.0–0 g5 7.Ne1 (7.a4 ba4 8.Ra4 Bg7+–) 7...Nf6 8.d3 (8.a4 Nd5+–) 8...Qe7 (8...Nc6 9.c3+=) 9.Nd2 (9.a4 Bg7+=) 9...d5 (9...Bg7 10.a4+=) 10.Bf3 (10.a4 ba4 11.Ra4 Bc6+=) 10...Nbd7 11.e4 (11.a3 a5+=) 11...d4 (11...Qb4!? 12.Bc1 d4–/+) 12.a3 h5 13.c3 Qd6 (better 13...dc3 14.Bc3 c5=) 14.cd4+– g4 15.de5 Ne5 Black gets the initiative 16.Be2 0–0–0 (16...Bh6 17.d4 0–0–0 A) 18.de5?! Qd2 19.Nd3 A1) 19...Be4? 20.Qd2 (20.ef6?! Bd3 21.Bd3 Qd3=) 20...Bd2 21.Nc5+– (21.ef6 Bd3 22.Bd3 Rd3=+); A2) 19...Ne4=; B) 18.Nb3+–) 17.d4 (17.a4 Nc6+–) 17...Ng6 18.e5 (better 18.Bd3 Nf4 19.d5+–) 18...Qd5?? (better 18...Ne5 19.de5 Qd2=) 19.ef6+– Re8 20.Nc2 (better 20.Nb1 Nf4 21.Nc3+–) 20…Qg2 0–1. valpa – Delboy Smith (1705), ChessWorld.net, 2009.

5.Be2 e5 6.a4 Be7 7.Nc3 (7.ab5 ab5 8.Bb5 Nd7 9.Ra8 Qa8+–) 7...Bf6 (better 7...a5!? 8.ab5 ab4 9.Ra8 Ba8=) 8.ab5+– ab5 9.Ra8 Ba8 10.Nb5 (10.Bb5 c6 11.Be2 Qb6+–) 10...e4 (10...Bf3 11.gf3 c6 12.Nc3+=) 11.Nfd4 c5 (11...Nc6!?+–) 12.Qa1+– Nc6? (better 12...Bd5 13.bc5 dc5+–) 13.Nd6! Qd6 (13...Kf8 14.bc5 Nd4 15.Bd4+–) 14.Qa8 Nb8 (14...Nd8 15.bc5 Qc7 16.Qe4 Ne7 17.Bb5 Kf8 18.Qa8+–) 15.bc5 Qd8 16.Qe4 Ne7 (16...Kf8 17.0–0 Bd4 18.Bd4+–) 17.Bb5 (better 17.Nf5 Kf8 18.Nd6+–) 17...Nd7 (17...Kf8+–) 18.c6 0–0 19.cd7 Bd4 (19...Ng6+–) 20.Bd4 Ng6 21.Bc5 (21.Bc5 Qa8 22.Qe8 Qe8 23.de8Q Re8 24.Be8+–) 1–0. GuestMVJT – GuestWDPN, freechess.org, 2018.

5.Be2 e6 6.0–0 Nd7 7.a4 Ngf6 8.ab5 ab5 9.Ra8 Qa8 10.Bb5 Bf3 (10...d5 11.c3+–) 11.Qf3 Qf3 12.gf3 e5? (better 12...d5 13.c3 Bd6+–) 13.Nc3+– Be7 14.Ra1 0–0 15.Ra7 Bd8 (15...Rc8 16.Ba6 Rb8 17.Rc7 Rb4 18.Ba3+–) 16.Na4 Nb6 (16...g5+–) 17.Nb6 cb6 18.Bc6 Ne8 19.b5 f6 (19...g6+–) 20.Rd7 Bc7 21.Kg2 h6 (21...f5 22.Re7+–) 22.Re7 Kh7 (22...Bd8 23.Re8 (worse 23.Be8 Be7 24.Bc6 f5=+) 23...Re8 24.Be8+–) 23.Be8 Bd8 24.Re6 Bc7 25.Bc6 Kg6 (25...Rf7 26.Bd5 Kg6 27.c4+–) 26.Re7 Bd8 27.Rd7 Kf5 (27...h5+–) 28.Rg7 Ke6 29.Bd7 Kd5 30.d3 e4 (30...f5 31.c4 Kc5 32.Ba3) 31.fe4 Kc5 32.Ba3 1–0. Mister – Everybody, internet free game, 2018.

5.Be2 e6 6.0–0 Nf6 7.a3 g6 8.c4 (8.a4!? ba4 9.c4+=) 8...bc4= 9.Bc4 d5 (9...Nbd7 10.Nc3=) 10.Be2 Bg7 (10...Bd6 11.Nc3+=) 11.Nc3+= 0–0 12.Na4 Nbd7 13.Qc2 Rc8 14.Rab1 Qe7 15.Ne5 Ne5 16.Be5 The backward pawn on c7 becomes a target 16...c6 (16...Nd7 17.Bg7 (17.Bc7? Be5–+) 17...Kg7 18.f4+–) 17.Qc5 Qd7? (better 17...Rfe8+–) 18.Nb6+– Qd8 19.Nc8 Qc8 20.Qd4 Nh5? (20...Ne8+–) 21.Bh5 gh5 (21...Be5 22.Qe5 gh5 23.Qg5 Kh8 24.Qf6 Kg8+–) 22.Bg7 Re8 (22...e5 23.Be5 Qf5 24.f3+–) 23.Be5 f5 (23...Rf8 24.Bd6 Re8 25.Qf4+–) 24.Qh4 Qd7 25.e4 Qf7 26.Rb3 Kf8 27.ef5 ef5 28.Bd6 Kg8 29.Rg3 Kh8 (29...Qg7 30.Rg7 Kg7 31.Qg5 Kf7 32.Qf5 Kg8 33.Qg5 Kf7 34.Qh5 Kf6 35.Qe8 Ba8 36.Be7 Ke5 37.Qh8 Ke6 38.Re1 Kf7 39.Qh7 Ke8 40.Qf5 c5 41.Bg5) 30.Qd4 (30.Qd4 Re5 31.Qe5 Qf6 32.Qf6) 1–0. Pierre – Sirin, internet, 2019.

4.Nf3 e6

5.a3 c5 6.bc5 Qc7 7.d4 d6 8.cd6 Bd6 9.Be2 Nf6 10.Nbd2 0–0 11.c4 bc4 12.Nc4 Be7 13.Rc1 Qd8 14.0–0 Nbd7 15.Nfe5 Nb6 16.Bf3 (16.Na5 Bd5+–) 16...Bf3 17.Qf3 White fights for the Initiative (worse 17.gf3 Rc8+=) 17...Nc4 18.Nc6 Qd7 (18...Nd2!? 19.Qe2 Qd7 20.Qd2 Rfc8 21.Ne7 Qe7+–) 19.Rc4+– Bd6 20.Rfc1 Nd5 21.g3 (21.e4!? Nb6 22.R4c2 Rfc8+–) 21...Qb7+– 22.R4c2 Qb3 23.Kg2 (23.Na5 Qd3 24.Nc4+–) 23...a5 (better 23...Ba3!? 24.e4 Qf3 25.Kf3 Bb2 26.Rb2 Nf6+–) 24.e4+– Nf6?? (better 24...Qf3 25.Kf3 Ne7+–) 25.Qb3 (25.Qb3 Ne4 26.d5+–) 1–0. BeepBeepImAJeep (2735) – chessmaster3000 (2380), lichess.org, 2016.

5.a3 d6 6.c4 e5 (6...bc4!? 7.Bc4 Nf6+=) 7.cb5+/– g5 (7...Nf6!?+/–) 8.ba6 (8.d4 g4 9.Nfd2 Qg5+–) 8...Na6 9.d4 g4 10.Nfd2 Qf6 (10...Qg5 11.de5 de5 12.Qe2+–) 11.de5 de5 12.Qg4 Nh6 13.Qg3 (better is 13.Qc4 Bg7 14.b5+–) 13...Qc6 (13...Bd6+–) 14.Qe5 Be7 15.Bb5 f6 16.Bc6 Bc6 17.Qe6 Bg2 18.Bf6 Kd8 19.Be7 Ke8 20.Bf6 Kf8 21.Qe7 Kg8 22.Qg7 1–0. Fournier,Frederic (1920) – pablogolz (1765), Active (5/0), 2004.

5.a3 Bd6 6.Be2 (better is 6.Bg7!? c5+–) 6...a5?? (6...Nf6 7.0–0=) 7.0–0 (7.Bg7 ab4 8.Bh8 ba3 9.Bb5 Nf6+–) 7...Na6?? (7...Nf6!?+=) 8.Bb5 (better is 8.Bg7 Bf3 9.Bf3+–) 8...Nf6+/– 9.d3 (9.ba5 Ng4 10.h3 Bf3 11.Qf3 Nh2+/–) 9...e5? (9...ab4!? 10.ab4 Bb4+=) 10.Be5 ab4 (10...Bf3 11.Bf6 Bd1 12.Bd8 Bc2 13.Bh4+/–) 11.ab4 Nb4 12.Ra8 Ba8 13.c3?? Bf3+= 14.Qf3 Be5 15.cb4 0–0 16.Qd1 h5 17.d4+/– Bh2? 18.Kh1?? Ng4 19.g3 Qg5 20.Qf3?? h4?? 21.Bd7 f5 22.Qg2?? f4?? 23.Bg4 Qg4 24.Kh2 fg3 25.fg3 hg3? 26.Kg1 c5 27.Rf8 Kf8 28.bc5 Ke7 29.Nd2 Qd1 30.Nf1 g5 31.Qg3 g4 32.Kg2 Qc2 33.Qf2 Qh7 34.Qg3 Qe4?? 35.Kh2 Qc2 36.Qg2 Qh7 37.Kg1 Qf5 38.Nh2 Qb1 39.Nf1 Qg6?? 40.Qb7+– Kd8 41.c6 g3 42.Qd7 1–0. valpa – dc, HCL–C2034 playchess.de, 2003.

5.a3 f5 6.c4 a5 7.ba5 bc4 8.Bc4+=.

5.a3 f5 6.c4+= bc4 7.Bc4 Nc6 8.0–0 Nf6 9.Qc2 Be7 (9...Bd6 10.Rc1+=) 10.d4 (10.Rc1 Bd6+=) 10...d5 (10...a5 11.b5 Na7 12.Nbd2+=) 11.Be2 Ne4 12.Rc1 0–0 13.Nbd2 Nd2 (13...Bd6 14.Bd3+=) 14.Qd2+/– Bd6 15.Rc2 Rc8 (15...Qf6 16.Rac1 Ne7 17.Ne5+/–) 16.Ba6 Ba6 17.Rc6 Bc4 (17...Bb5 18.Rcc1+/–) 18.a4 Qd7 (18...Ra8 19.b5+/–) 19.b5+– Ra8 20.Qc2 f4 (20...Rfb8 21.Nd2 Be2 22.f3+–) 21.Ng5 g6 22.e4 Rfe8 (22...Qe7 23.h4+–) 23.e5 Bf8 24.Ne4! Bg7 25.Nd2 Be2 26.Rc1 Bh6 27.Rc7 Qd8 28.f3 Qh4 29.b6 Ba6 30.b7 Rab8 31.Qc6 Bd3 32.Rc8 Qe7 33.Re8 (33...Re8 34.Qe8 Qe8 35.Rc8+–) 1–0. Torre,Isidro – Reilly,Harry, Quad–657.3, 1998.

5.a3 f5 6.c4 Nf6 7.c5 (better is 7.cb5!? Be7 8.ba6 Na6 9.Be2+/–) 7...Be7 8.Be2 0–0 9.0–0 Qe8 10.d4 Ne4 11.Nc3 Qg6 12.Ne5 Qg2 13.Kg2 Nc3 14.Bf3?? (better is 14.c6 Nd1 15.cb7+– (< 15.Rfd1 Nc6 16.Bf3 Rad8–/+)) 14...Nd1= 15.Rad1 (15.Bb7 Ra7 16.Rad1 Rb7 17.Nd7 Nd7=+) 15...Bf3=+ 16.Kf3 d6 17.Nd3 Nd7 (17...a5 18.Rg1 g5 19.e4–/+) 18.Rg1 Nf6 19.Nf4 Kf7 20.d5 ed5 (< 20...dc5 21.Ne6 Rg8 22.Ng5 Ke8 23.bc5+–) 21.Nd5 (21.Bf6 Bf6 22.cd6 cd6 23.Nd5 Be5=+) 21...Nd5=+ 22.Rd5 g6 23.cd6 Bd6 24.Be5 Ke6 25.Bd6 Kd5 26.Bf8 Rf8 27.Rd1 Kc4 28.Rc1 (better is 28.Rd4!? Kb3 29.Rd3 Ka4 30.h3–/+) 28...Kb3–+ 29.Rc7 Ka3 30.Ra7 Rf6 31.Rh7 Kb4 32.Ke2 Rd6 33.h4 a5 34.h5 gh5 35.Rh5 a4 36.Rf5 a3 37.Rf4 (37.Rf8 Kc3 38.Rc8 Kb3–+) 37…Kc3 (38.Rg4 b4–+) 0–1. Heuston,George – Wall,Bill, Palo Alto CA, 1988.

5.a4 ba4 6.Ra4 Nf6 7.b5 c5 8.ba6 Na6 9.Nc3 Nb4 10.Bc4 (10.Ra8 Qa8 11.h3 Bf3 12.gf3 d5=) 10...Ra4 11.Na4 Qa8 12.Bb5 Be7 (better 12...Qa5 13.Nc3 Bf3 14.gf3 Nfd5 15.Nd5 ed5=) 13.Nb6?? (better 13.Bf6 gf6 14.Bd7 Kf8 15.Bb5=) 13...Qa5–+ 14.Bf6 (14.Bd7 Nd7 15.Nd7 Kd7–+) 14...gf6 (better 14...Qb5!? 15.Be7 Ke7 16.Ne5 Qb6 17.0–0–+) 15.Bd7 Kd8 16.Nc4 Qa6 17.Be6 (17.d3 Bf3 18.Qf3 Kd7–+) 17...fe6 18.d3 Rg8 19.0–0 Qa8 (better 19...Qa2!? 20.c3 Nd5 21.Nh4–+) 20.e4–/+ f5 (20...Qa4 21.Ne1–/+) 21.c3 Nc6 22.Qb3 Ke8 23.Nb6 (better 23.Nd6 Bd6 24.Qe6 Ne7 25.Qd6 fe4 26.Re1=) 23...Qa7?? (23...Qd8 24.ef5 Ne5 A) 25.Ne5?? Rg2 26.Kh1 Rf2 27.Kg1 Rg2 28.Kh1 Rb2 29.Kg1 Rb3–+ (29...Qb6?! 30.Qb6 Rb6 31.f6–+); B) 25.Ne1 Qd3 26.f3 Qe3 27.Kh1–+) 24.Rb1?? (better 24.Qe6!? Rg7 25.Qd7 Kf8 26.Qf5 Kg8 27.Nd5+–) 24...fe4 (better 24...Nd8–/+) 25.Ne5?? (better 25.Qe6 Rg6 26.Qd7 (worse 26.Qe4 Nb4 27.Qf5 Qb6 28.cb4 cb4–+) 26...Kf8 27.de4=) 25...Ne5–+ 26.Qe6 Rg5 27.f4 (27.h4 Rg6 28.Qe5 Rb6 29.Re1–+) 27...Rg7 (better 27...ef3 28.Nc8 Bc8 29.Qc8 Kf7 30.Qh3–+) 28.Qe5?? (28.fe5 ed3 29.Qd7 Kf8 30.Nc8 c4 31.Na7 Bc5 32.Qd4 Bd4 33.cd4–+) 28...Rg6 (better 28...Qa2 29.Qg7 Qb1 30.Kf2 Qb6 31.Qg8 Bf8–+) 29.Qh8 Kf7 (29...Bf8 30.Nc4 Qa2 31.Nd6 Rd6 32.Qe5 Re6 33.Qb8 Kf7 34.Rb7 Kg8 35.f5–+) 30.Qh7 (better 30.Nc4!? Rg8 31.Qh7 Kf8 32.de4+–) 30...Rg7= 31.Qh5 Rg6?? (31...Kg8 32.Qe8 Kh7 33.Qh5 Kg8 34.Qe8 Kh7 35.Qh5 Kg8=) 32.Qh7 (32.f5 Bg5 33.fg6 Ke6 34.Qg5+–) 32...Rg7= 33.Qh5 Rg6?? (better 33...Kg8 34.Qe8 Kh7 35.Qh5 Kg8 36.Qe8 Kh7 37.Qh5 Kg8=) 34.Qh7 (34.f5 Bg5 35.fg6 Ke6 36.Qg5+–) ½–½. aravind555 (1605) – Oong_67, lichess.org, 2018.

5.a4!? ba4 6.c3+=.

5.a4 Bb4?? 6.ab5?! Nf6=.

5.a4 Bb4?? 6.Bg7 Be7 7.Bh8+–.

5.a4 Bb4?? 6.Bg7 f6 7.Bh8 Qe7 8.ab5 a5 9.c3 Bd6 10.Bd3 (10.d4 Nh6 11.Nfd2 Qf8 12.Qh5 Ke7+–) 10...h6 (10...Qf8 11.Nh4 f5 12.Be2+–) 11.Bg6 Kd8 12.0–0 (12.Qa4 f5+–) 12...e5 (12...Qf8+–) 13.d4 Qf8 (13...Qe6 14.de5 fe5 15.Bc2+–) 14.de5 fe5 15.Ne5 Ne7 (15...Be5 16.Be5 Qc5 17.Qh5+–) 16.Nf7 Kc8 17.Bh5 Qg8 18.Qg4 Qh7 (18...Bc5 19.Bg7+–) 19.Nd6 cd6 20.Qc4 Kd8 21.Bd4 Nbc6 (21...Nc8 22.Bf6 Ne7 23.Nd2+–) 22.Bb6 Kc8 23.Rd1 d5 24.Qf4 Qg8 (24...d6 25.Bg4 Nf5 26.Qd6 Ba6 27.bc6 Qe7 28.Bf5 Qe6 29.Be6) 25.Qc7 1–0. GuestCQWF – archjos, freechess.org, 2019.

5.a4 Bb4?? 6.Bg7 Nf6 7.Bh8 c5 (7...c6 8.c3 Be7 9.d4+–) 8.Bf6 Qf6 9.c3 Ba5 10.ab5 ab5 11.Bb5 Nc6 12.0–0 Nb4 (12...Ne7 13.d4 cd4 14.cd4+–) 13.Qb3 (better is 13.cb4 Qa1 14.ba5 Qa5+–) 13...Bf3 14.gf3 (< 14.cb4 cb4 15.gf3 Qa1+–) 14...Qg6 15.Kh1 Nc6 (15...Qh5 16.Be2 Nc6+–) 16.Rg1 Qf5 (16...Qh5 17.Bc6 Ra6 18.Qb8 Ke7 19.Rg8+–) 17.Rg8 (better is 17.Bc6 Ra6 18.Bd7 Ke7+–) 17...Ke7 18.Ra8 Bc7 (18...Qf3 19.Kg1 Ne5+–) 19.Bc6 (better is 19.f4 Qe4 20.Kg1 Qg6 21.Kf1 Qe4+–) 19...dc6?? 20.R1a7+– Qe5 21.f4 Qe4 22.Kg1 Qg6 23.Kf1 Qe4 24.Rc7 Kd6 25.Rac8 Qh1 26.Ke2 e5 27.Rc6 Qc6+– 28.Rc6 Kc6 29.fe5 c4 (30.Qc4 Kb6+–) +–. Galaxy8 – GULP, Live Game Caissa's Web, 2004.

5.a4 c6 6.ab5 ab5 7.Ra8 Ba8 8.Be2 Nf6 9.c3 Be7 10.Nd4 0–0 11.0–0 Nd5 12.Bf3 Bf6 13.Qc2 Qc7 (13...d6 14.d3=) 14.Na3 Na6 (14...Qd6 15.Qd3+=) 15.Ra1 Bb7 16.Nb3 (16.Qd3 Ra8=) 16...Nb6 (16...Be5 17.Kh1=) 17.Na5 Ba8 18.d4 Na4 19.Bc1 d5 20.e4 g6 21.e5 Bg7 22.Bg5 Nb8 (22...f6 23.ef6 Bf6 24.Bf6 Rf6 25.Qd3+–) 23.Qd2 (23.c4 dc4 24.N3c4 Na6+–) 23...Nd7 24.Bf4 Re8 (24...Qd8 25.c4!+–) 25.Nc2 (25.c4 bc4 26.N3c4 Nab6+–) 25...Ndb6 26.h4 (26.Ne3 Bb7+–) 26...h5 (26...Bb7 27.h5+–) 27.Ne3 (better 27.Be2+–) 27...Nc4? (better 27...Qe7+–) 28.Nac4+– dc4 29.Nc4! Nc3? (29...bc4 30.Qa2 Double attack (30.Ra4 Deflection; 30.Qa2 Decoy; 30.Ra4 Overloading)) 30.Nd6 (30.Qc3?! bc4 31.Qc4 Qd7+–) 30...Rd8 (30...Ne2 31.Be2 Rb8 32.Bh6+–) 31.Qc3 Bf8 (31...Qe7 32.g3 Rb8 33.Bc6+–) 32.d5! ed5 (32...cd5 33.Qc5 Double attack (33.Qc7 Pinning; 33.Qc7 Deflection; 33.Qc5 Decoy); 32...ed5 33.Bd5) 33.Bd5! Bg7 (33...cd5 34.Qc5 Double attack (34.Qc7 Pinning; 34.Qc7 Deflection; 34.Qc5 Decoy)) 34.Bf7 Kh7 35.Bg6 Kg6 36.Qd3 (36.Qc2) 1–0. onur604 (2320) – owl77 (1995), lichess.org, 2020.

5.a4 c6 6.ab5 cb5 7.c4 bc4 8.Bc4 Nf6 9.Qb3 (9.b5 Qc8 10.Bd3 ab5 11.Ra8 Ba8 12.Bb5 Na6=) 9...d5 (9...Nc6 10.0–0=+) 10.Bd3 Be7 (10...Nc6 11.b5 ab5 12.Qb5+=) 11.0–0 (11.b5 0–0=) 11...0–0 12.b5 (12.Nc3 Nc6=) 12...Qb6 (better 12...Nbd7!?=) 13.Bd4+= Bc5 14.Bf6 gf6 15.Nc3 Nd7 (15...ab5!? 16.Bb5 Ra1 17.Ra1 Bc6+=) 16.Qa4 ab5 17.Qg4 Kh8 18.Ra8 Ba8 (18...Ra8 19.Qh5 f5 20.Ng5+– (20.Nb5?! Ba6 21.Ra1 Nf6+=; worse 20.Bb5 Nf6 21.Qh4 Qd8+–)) 19.Qh4 (19.Nb5?! Ne5 20.Ne5 fe5=) 19...f5 20.Bb5 (20.Ng5 Nf6+–) 20...Bc6 21.d4 (21.Ng5 Nf6+–) 21...Bb5+= 22.Ng5 Nf6?? (22...h5 23.dc5 Qc5 (23...Nc5?? 24.Qh5 Kg7 25.Qh7 Kf6 26.Nd5 ed5 27.Qh6 Ke7 28.Qb6+–) 24.Qh5 Kg7 25.Qh7 Kf6+=) 23.dc5+– Qc5 24.Qh6 Qe7 25.Nb5 Rg8 26.Rc1 Rg6 (26...Rg7 27.h4 Ng8+–) 27.Rc8 (27.Rc8 Rg8 28.Nd6 Rc8 29.Nc8 Qc7 30.Qf6 Kg8 31.Ne7 Qe7 32.Qe7 Kg7 33.Ne6 Kg6 34.Qg5) 1–0. guest432 – guest467, chessclub.com, 2020.

5.a4 Nf6 6.ab5 ab5 7.Ra8 Ba8 8.Na3 c6 9.c4 bc4 10.Qa4 Bb7 11.Nc4 Ba6 12.Qa5 Qa5 13.ba5 (worse 13.Na5 Bf1 14.Kf1 Bb4 15.Bf6 gf6–/+ (15...Ba5?! 16.Bg7 Rg8 17.Be5=)) 13...d5 (13...Bb4 14.Be5 Ke7 15.Bc7=) 14.Nb6 Bb4 15.Ba6 Na6 16.Ke2 0–0 (16...Ba5!? 17.Ra1 Bb6 18.Ra6 Nd7+=) 17.Bf6+– gf6 18.Ra1 Rd8 19.Nd4 Rd6 20.Nc8 Rd8 21.Na7 c5 22.Nac6 Ra8 23.Nb5 c4 (23...Kf8 24.Nd6+=) 24.e4+– Kf8 25.ed5 ed5 26.Nb4 Nb4 27.Nc3 (27.Nc7 Ra7 28.Ra4+–) 27...Ra6 (better 27...d4!? 28.Nb5 Re8 29.Kf3 Nc2+=) 28.Ra4+– Nc6 29.Nd5 Ra5 30.Rc4 Rd5 31.Rc6 Ke7 32.h3 Re5 33.Kf3 Rd5 34.Ke3 Re5 35.Kd3 Rd5 36.Kc3 Rf5 37.f3 h5 (37...Ra5 38.Kd4+–) 38.Ra6 (38.d4 h4 39.Rc5 Rg5 40.Rg5 fg5+–) 38...h4 39.d4 Rg5 40.Ra2 Kd6 41.Kc4 f5 42.f4 Rg8 43.Ra6 Ke7 44.Ra2 Kd6 45.d5 f6 (45...Re8 46.Ra6 Kd7 47.Kc5+–) 46.Kd4 (46.Ra6 Ke7 47.Re6 Kf7+–) 46...Rg6 (46...Re8 47.Ra6 Kd7 48.Kc5+–) 47.Ra6 Kd7 48.Ra7 Kd6 49.Ra6 Kd7 50.Ra2 Kd6 51.Kc4 Kc7?? (51...Rg8 52.Ra6 Ke7 53.Re6 Kd7 54.Rf6 Rg2+–) 52.Kc5+– Rg3 53.d6 Kd7 54.Ra7 Kd8 55.Rh7 Rg2 56.Rh4 Rf2 57.Kc6 Rc2 58.Kd5 Re2 (58...Rd2 59.Ke6 Re2 60.Kf5+–) 59.Rh8 Kd7 60.Rh7 Kd8 61.h4 Rd2 (61...Re4 62.h5 Rf4 63.h6+–) 62.Ke6 Re2 63.Kf5 1–0. onur604 (2320) – owl77 (1995), lichess.org, 2020.

5.a4 Nf6 6.ab5 ab5 7.Ra8 Ba8 8.Bb5 Bb4 9.0–0 Bc6 10.Be2 0–0 11.c3 Bd6 (11...Be7 12.c4=) 12.d4+= Be4 (12...Ne4 13.c4+=) 13.Nbd2 Bg6 14.c4 Bb4 (14...Nc6 15.Nh4+=) 15.Ne5 (15.Nh4 Be4+=) 15...Ne4 (15...Bf5 16.Ndf3+=) 16.Ng6+– Nd2 17.Nf8 Nf1 (17...Qf8!? 18.Re1 Ne4+–) 18.Ne6+– (18.Qf1?! Qf8 19.Bd3 d5+–; 18.Bf1?! Bf8 19.Bd3 Nc6+–; 18.Kf1?! Bf8 19.Kg1 d5+=) 18...fe6 (18...de6 19.Bf1 Nd7 20.Bd3+–) 19.Kf1 (19.Bf1 Qh4+–) 19...Be7 (19...Qh4 20.Kg1+–) 20.d5 (20.Bd3 Na6+–) 20...ed5 (20...Bf6 21.Bf6 Qf6 22.c5+–) 21.Qd5 Kh8 22.Bd3 Bf6 (22...Qg8 23.Qb7 c5 24.Qe4+–) 23.Qf5 (23.Qf5 Kg8 24.Qh7 Kf7 25.Qg6 Kf8 26.Ba3 d6 27.c5+–) 1–0. Anonymous – Anonymous, lichess.org, 2020.

5.a4 Nf6 6.ab5 ab5 7.Ra8 Ba8 8.c3 c5 (8...Be7 9.Bb5 0–0 10.0–0+–) 9.Bb5 (9.bc5 Bc5 10.Bb5 Bc6+–) 9...cb4+= 10.Qa4 (10.0–0 Bc6 11.Qe2 Be7+=) 10...bc3 11.Nc3 Bc6 12.0–0 Be7 (12...Bf3 13.gf3 Be7 14.Ra1=) 13.Ne5 Bb5 14.Nb5 0–0 15.Rc1 Nd5 16.f4 (16.Qb3 Nf6+=) 16...f6 (16...Nc6 17.Qc4=) 17.Nc4 Nc6 18.Nd4 Nd4 19.Bd4 (19.ed4? Nf4 20.Rf1 Qc7–+) 19...Qa8 (19...Qe8!?=) 20.Qd7+– Qc8 21.Qa4 Nb4 22.Qb3 Qa6 (22...Qc6 23.f5!+–) 23.f5! Rc8 (23...ef5 24.Nd6 Double attack (24.Nd6 Decoy)) 24.d3 Kf8 (24...Qa2!? 25.Qa2 Na2+–) 25.Ra1+– Qc6 (25...Qb5 26.fe6 Qd5 27.Ra4+–) 26.Nb6 Rd8 27.fe6 Bc5?? (27...Nc2 28.Nd7 Kg8+–) 28.Nd7 Ke7 (28...Ke8 29.Nc5 Nd5+–) 29.Bc5 Ke8 1–0. onur604 (2275) – egekayalar123456789 (2045), lichess.org, 2020.

5.c3 Nf6 6.d4 Bd6 7.Nbd2 0–0 8.Bd3 h6 (8...a5 9.a3 c6 10.0–0=) 9.0–0+= Ng4 (9...Bc6 10.a3+=) 10.e4+/– c6? (better is 10...Bf4+/–) 11.h3+– Nf6 12.e5 Bc7 13.ef6 Qf6 14.Qe2 (14.Ne4 Qe7+–) 14...c5 (14...d5+–) 15.Ne4 Be4 16.Qe4 d5 17.Qh7 1–0. woschkat (1995) – dgall, net–chess.com, 2001.

5.c4 c6 6.a3 Nf6 7.d4 Be7 8.cb5 cb5 9.Bd3 d5 10.Nbd2 Nbd7 11.Nb3 Qb6 12.Nc5 Nc5 (12...0–0 13.Ne5 Bc6 14.0–0+=) 13.dc5+/– Qc6 (13...Qc7 14.Be5 Qd7 15.0–0+/–) 14.a4 h6 (better is 14...0–0!?+/–) 15.Ne5 Qc8 16.0–0 0–0 17.c6 Bc6 (17...Bb4 18.cb7 Qb7 19.Ng4+–) 18.Rc1 1–0. Fournier,Frederic (2080) – NN, Active, 2004.

5.c4 c6 6.a4 Qe7 (6...bc4 7.Bc4 Nf6= (7...Bb4?? 8.Bg7 Nf6 9.Bh8+–)) 7.c5+– d6 8.ab5 (8.d4 Nf6+–) 8...dc5 (8...cb5 9.d4=) 9.bc6 (9.ba6 Na6 10.bc5 Qc5+=) 9...Nc6 10.b5 ab5 11.Ra8 Ba8 12.Bb5 Qb7 13.Nc3 Nge7 (13...f6 14.d4+–) 14.0–0 (14.Ne5 Qc7 15.Ne4 Bb7 16.Nc5 Ng6 17.Nb7 Nge5 18.Be5 Qb7+–) 14...f6 (14...Ng6!?+=) 15.Qa4+– Nd5? (better 15...Qc8+–) 16.Nd5+– ed5 17.Ra1 Be7 (17...Ke7 18.Bc6 Qc6 19.Qa8 Qa8 20.Ra8 Rg8+–) 18.Qa8 Qa8 19.Ra8 (19.Ra8 Bd8 20.Ra7+–) 1–0. GuestRBHB – GuestXDNK, freechess.org, 2017.

5.c4 c6 6.cb5 cb5 7.a4 ba4 8.Ra4 Nc6 9.b5 ab5 10.Ra8 Ba8 11.Bb5 Qb6 12.Qb3 Nb4 13.Qa4 Bc6 (13...Bf3!? 14.gf3 Nd3 15.Bd3 Qb2 16.Qa8 Ke7=) 14.Bc6+= Nd3? (better 14...Qc6!? 15.Qc6 Nc6+=) 15.Ke2+– Nb2 16.Bd7 Ke7 17.Qc6 Qc6 18.Bc6 Kd6? (better 18...Nc4+–) 19.Bb5 Kc5 (19...g5 20.Ng5 Nh6 21.Rc1+–) 20.Be8 (20.Nc3!? Kb6 21.Ra1 Bb4 22.Ra6 Kc7+–) 20...Nf6? (20...Nh6 21.Rc1 Kb4 22.Rc7+–) 21.Bf7 Kd6 22.Rc1 Na4 23.Rc8 (23.Ng5 h6 24.Ne6 Nb6+–) 23...Ke7 (23...Nb6 24.Rc2+–) 24.Rc7 Nd7 25.Ne5 Nab6 26.f4 Kd8 (26...g5 27.Nd7 Nd7 28.fg5 Kf7 29.Rd7 Be7 30.h4+–) 27.Ra7 Bd6 (27...Ne5 28.fe5 Nd7 29.Be6 Ne5 30.Nc3+–) 28.Nd7 Nd7 29.Be6 Bc7 (29...Nf8 30.Nc3+–) 30.Nc3 Re8 (30...Nf6 31.Ra8 Ke7 32.Rh8 Ke6 33.Kf3+–) 31.Bd7 Kd7 32.Nd5 Rc8 33.Nc7 Rc7 34.Rc7 Kc7 35.d4 1–0. Atotheking (1675) – etabeta1 (1725), lichess.org, 2020.

5.c4 Ne7 6.cb5 ab5 7.Bb5 Nf5 8.a3 Be7 (8...Nh4 9.Nh4 Qh4 10.Bf1+–) 9.Bd3 0–0 10.Nc3 c5 11.b5 Nd6 12.Qc2 f5 13.Be2 Be4 (13...Ra5 14.a4+–) 14.Ne4 Ne4 (14...fe4 15.Ne5+–) 15.0–0+– Qb6 16.a4 Rc8 (16...Bf6+–) 17.d3 Nf6 18.Rfb1 d5 Black prepares c4 (18...Nd5 19.Qd2+–) 19.Bc3 c4 (19...Nbd7 20.a5 Qd6 21.Qb2+–) 20.dc4 dc4 21.Bd4 Qd8 22.b6 (22.Bc4 Nd5+–) 22...Rc6 (22...Ra5 23.b7 (worse 23.Bc4 Nd5+–) 23...Rc6 24.Ne5 Re5 25.Be5+–) 23.Ne5 Rd6 24.b7 (worse 24.Nc4 Rc6+–) 24...Ra7 (24...Ra5 25.Nc4 Rc6+–) 25.Ba7 Rd2 (25...Ng4 26.Bg4 Bf6 27.Qc4 Be5 28.Qc8+–) 26.Qc4 Nfd7 27.Qe6 Kf8 (27...Kh8 28.Nf7 Kg8 29.Nd8 Kh8 30.Nf7 Kg8 31.Nh6 Kh8 32.Qg8) 28.Qf7 1–0. Janek – Nicolas, internet, 2016.

5.d3 Bb4–/+ 6.Nbd2 Be7?? (better 6...Nf6–/+) 7.Bg7+– Bf6 8.Bh8 Bh8 9.c3 Ne7? (9...Bc3 10.Rc1 Decoy) 10.Rc1 Nbc6 11.Be2 d5 (11...Bg7 12.0–0+–) 12.0–0 Bf6 13.e4 (13.a4 ba4 14.Qa4 Bc8+–) 13...Ne5 14.Ne5 Be5 15.f4 Bg7 16.e5 Nf5 17.Qe1 Qh4 (17...c5 18.Bg4+–) 18.Qh4 Nh4 19.g3 Nf5 20.Nb3 Ne3 21.Rf2 Ke7 (21...Bf8 22.d4+–) 22.Nc5 Bc8 23.h3 (23.Rf3 Nf5+–) 23...Nf5 (23...Ke8 24.Rf3 Nf5 25.d4+–) 24.g4 Nh4 25.Kh2 f6 (25...Ng6 26.Kg3+–) 26.Kg3 (26.d4!? Ng6+–) 26...Ng6 27.ef6 Bf6 28.g5 Bg7 29.d4 c6? (29...b4 30.Nb3 bc3 31.Rc3 Kd6+–) 30.Bg4 Bd7 (30...Kf7+–) 31.Re1 Nf8 (31...Kd6 32.Nd7 Kd7 33.Re6+–) 32.f5 h5 (32...Kd6 33.Nd7 Nd7 34.Re6 Kc7 35.Re7+–) 33.Bh5 (better 33.f6 Bf6 34.gf6 Kd6 35.Bh5 a5+–) 33...e5 (33...Kd6 34.Nd7 Kd7 35.fe6 Kd6+–) 34.f6 Bf6 35.gf6 Kd6 36.Re5 Ne6 (36...a5 37.f7 b4 38.Bg4+–) 37.f7 (better 37.Nd7 Kd7 38.Bg4 Rf8+–) 37...Rf8 (37...Nc5 38.f8Q Rf8 39.Rf8 Ne4 40.Kh4 Kc7+–) 38.Nd7 Kd7 39.Rfe2 (better 39.Bg4 Kc7 40.Re6 Kb6+–) 39...Ng7 40.Bg6 Kd8 41.Re7 Rf7 42.Rf7 Ne8 43.Rf8 (43.Rf8 Kd7 44.Be8 Kc7 45.Rf7 Kb6 46.Re6 b4 47.Rc6 Ka5 48.Rb7 bc3 49.Rc5; 43.Ree7 Nd6 44.Rd7 Kc8 45.Rd6 a5 46.Bf5 Kb8 47.Rd8) 1–0. e4_e5_f4 (1740) – ch77essi988 (1780), lichess.org, 2020.

5.d4 Bb4+= 6.Bc3 (6.c3!? Bd6 7.a4+=) 6...Qe7 7.Qd3 c6 (better is 7...Nf6!?–/+) 8.Be2 Nf6 9.Bb4 Qb4 10.Qc3 (10.Nbd2 d5+=) 10...Nd5 11.Qb4 Nb4 12.Na3 d6 13.c3 (13.c4!?+=) 13...Nd5–/+ 14.c4 Nc3 15.cb5? (better is 15.Bd3!?–/+) 15...ab5–+ 16.Nc2 Nd7 17.Bd3 Ra2 (17...Nf6 18.Ng5–+) 18.0–0? (18.Kd2!? Ra1 19.Ra1–+) 18...0–0 19.Nb4? (19.Ra2 Na2 20.Nd2–+) 19...Ra1 20.Ra1 Nf6 (20...c5 21.Nc2–+) 21.Ra7?! (21.Rc1 Nfe4 22.Ng5 c5 23.Ne4 Be4 (23...Ne4?! 24.Be4 Be4 25.dc5+=) 24.dc5 dc5 25.Rc3 cb4–+) 21...Rb8 (21...Ra8!? 22.Ra8 (22.Rb7?? Ra1 23.Bf1 Ne2 24.Kh1 Rf1 25.Ng1 Rg1) 22...Ba8 23.Nd2–+) 22.Kf1 Ncd5 (better is 22...c5!? 23.dc5 dc5 24.Na6 Ba6 25.Ra6–+) 23.Nd5 Nd5 (23...cd5?! 24.Bb5 Ne4 25.Ke1–/+; worse is 23...ed5 24.Nd2–+) 24.Nd2 g6 (24...f5 25.e4 Nb4 26.Bb1–+) 25.Nb3? (better is 25.Ne4!? Nb4 26.Bb1+=) 25...Nb4 26.Be2 Nd5 27.Bf3 (27.Bd3 Kg7 28.Ke1–+) 27...b4–+ 28.Bd5 ed5 29.Ke2 Kg7 30.Kd3 (30.Kd2 h5–+) 30...Kf6 31.f3 h5 32.h4 Ke6 (32...Bc8 33.Kd2 Rb6 34.Rc7–+) 33.e4 de4 34.fe4 Kf6 (34...f5 35.ef5 gf5 36.Na5–+) 35.Kc4? (better is 35.Na5 Ba8 36.Nc4–/+) 35...Ke6 (better is 35...c5!? 36.dc5 Bc8 37.Nd4–+) 36.Kb4 (36.Kd3 f5 37.ef5 gf5 38.Na5–+) 36...Ba6 (better is 36...c5!? 37.Kc3 cd4 38.Nd4 Ke5 39.Nf3 Kf4–+) 37.Kc3+= Bb5 38.Kd2? (better is 38.e5!? Bd3 39.ed6 Kd6 40.Rf7=) 38...Bf1 39.g3?? (better is 39.Na5 Rb2 40.Kc3–/+) 39...Rb3–+ 0–1. smoothoperator (2255) – grahamtrue (2165), net–chess.com, 2015.

5.Be2 Bb4?? 6.Bg7 Nc6 7.Bh8+–.

5.Be2 Bb4?? 6.Bg7 Be7 7.Bh8 Bf6 8.Bf6 Qf6 9.d4 d5 (9...Ne7 10.a4 b4 11.c3+–) 10.0–0 Nd7 11.Nbd2 Ne7 12.a4 b4 13.a5 (13.Rb1 c5+–) 13...0–0–0 (13...c5 14.c4 bc3 15.Qb3+–) 14.Nb3 (14.Rb1 c5 15.c3 Rg8+–) 14...Rg8 15.Nc5 (15.Qd2!? Nc6+–) 15...Qg6 (15...Nc5 16.dc5 Nc6 17.Rb1+–) 16.g3 Nc5 17.dc5 c6 (17...Qf6 18.Ra4+–) 18.c4 (18.Rb1 Qg7+–) 18...h5 (18...dc4 19.Ne5 Qg7 20.Qd7 Kb8 21.Nc4+–) 19.cd5 (better 19.Rb1 Kc7+–) 19...Nd5 20.Ne5 Qf6 (20...Qg7 21.Nc4 Nc3 22.Qd2+–) 21.Nc4 Nc3 (21...Kb8 22.Nb6 Rd8 23.Nd5 Rd5 24.Qb1+–) 22.Qd2 (better 22.Nb6 Kb8 23.Nd7 Ka7 24.Nf6 Nd1 25.Ng8 Nc3 26.Bh5 f5+–) 22...h4 (22...Qg5+–) 23.Nb6 Kc7 24.Qd7 (24.Qd6) 24...Kb8+– 25.Bf3 (25.Ba6 Ba6 26.Qc6 Ne2 27.Kg2 h3 28.Kh1+–) 25...Qf3–+ 26.Qf7 (26.Qd1 Nd1 27.Rfd1 hg3 28.fg3 Qe3 29.Kg2–+) 26...Qf7 (26...Ne2) 27.Rac1 (27.Rfe1 Qf3 28.Nd7 Kc7–+) 27...h3 (27...Qf3 28.Rfd1 Rg3 29.hg3 Ne2 30.Kf1 Ng3 31.Ke1 Qe2) 28.f3–+ Ne2 29.Kf2 Nc1 30.Rc1 Qf6 (better 30...Qg7 31.Nc4 b3–+) 31.Nd7+– Kc8? (better 31...Kc7 32.Nf6 Rf8+–) 32.Nf6 Rf8 33.Ne4 Kc7 34.Nd6 (34.Rb1 Bc8+–) 34...Bc8? (34...Rb8+–) 35.Nb7 (better 35.Rb1+–) 35...Kb7 (35...Bb7 36.g4 Rd8 37.Rc4–+) 36.Re1? (better 36.Rb1=+) 36...Kc7 37.f4?! (37.g4 e5 38.Kg3 Be6–+) 37...e5 (37...Rf5 38.Rc1 b3 39.Rc3 Rc5 40.Rb3 Rc2 41.Kf3 Rh2 42.g4–+) 38.Kf3 Re8 (38...ef4 39.ef4 Rf5 40.Re7 Bd7 41.Re4–+) 39.fe5? (39.Rb1–+) 39...Re5 40.Kf4 (40.Rb1–+) 40...Be6 (better 40...Rf5 41.Ke4 Rc5–+) 41.Ke5+– Bd5 0–1. sean_moraco (1945) – alddhsfd (1995), lichess.org, 2020.

5.Be2 Bb4?? 6.Bg7+– Nf6 7.Bh8 Ne4 8.Bb2 Nc6 9.0–0 Bd6 10.d3 Ng5 11.Nbd2 Qe7 (11...Nf3 12.Nf3 Qe7 13.Rb1+–) 12.Ng5 Qg5 13.Ne4 Bh2 (13...Qe7 14.Bf3+–) 14.Kh2 Qh4 15.Kg1 f5 (15...Ne7 16.Nf6 Kd8 17.Bh5+–) 16.Nc5 (better is 16.Bh5 Ke7 17.Bf6 Qf6 18.Nf6 Kf6+–) 16...Bc8 (16...Qb4 17.Nb7 Qb2 18.Bf3+–) 17.Bh5 Ke7 18.Qf3 Ra7 (18...Qb4 19.Nb3 Qd6 20.Bd4 Nd4 21.Qa8 Nc2 22.Qc8+–) 19.Qh3 (better is 19.Ne4 Bb7 20.Bf6 Qf6 21.Nf6 Kf6+–) 19...Qb4 (19...Qh3 20.gh3 d6+–) 20.Nb3 Na5 21.e4! Nb3 22.Qh4 Kd6 23.e5 Kc5 24.Qb4 Kb4 25.a3 (25...Kc5 26.cb3+–) 1–0. Bittner,H – Koehler, 1986.

5.Be2 Bb4?? 6.Bg7 Nh6 7.Bh6?! Qf6 8.c3 Qh6 9.cb4 Nc6+–.

5.Be2 Bb4?? 6.Bg7 Nh6 7.Bh8+–.

5.Be2 Nc6 6.a3 Nge7 (6...Nf6 7.c4 bc4 8.Bc4=) 7.0–0 Ng6 8.c4 bc4 9.Bc4 Na7 (9...Nh4 10.d3+=) 10.Nc3 d5 (10...c5 11.bc5 Bc5 12.d4+=) 11.Bb3 (11.Ba6 Ba6 12.Qa4 Qd7 13.Qa6 Bd6+/–) 11...Rc8 (11...a5 12.ba5 Bd6 13.Ba4 c6 14.d4=) 12.d4 Bd6 13.Ne2 (13.Na4 Nh4+=) 13...0–0 14.Qc2 (14.Bc2 a5+=) 14...c6 (14...Nh4 15.Nh4 Qh4 16.f4=) 15.Ne5 (15.Rfc1 a5+=) 15...Be5 (15...c5!? 16.bc5 Ne5 17.de5 Bc5= (< 17...Rc5 18.Qb1 Bb8 19.Bd4+/–)) 16.de5+= Qg5 (16...c5 17.bc5 Qc7 18.f4+=) 17.f4+/– Qg4 18.e4 (18.Bd4 Nb5+/–) 18...de4 19.Qe4 Rc7 (19...c5!? 20.Qb7 Qe2+=) 20.h3+/– Qh5 21.Rad1 (21.Qe3!? c5 22.Rac1+/–) 21...c5+= 22.Qc2 (22.Qe3 cb4 23.f5 Bg2 24.Kg2 Nh4 25.Kh2 Nf5+=) 22...Nb5 (22...c4!? 23.Ba2 Nh4=) 23.bc5+= Rfc8 24.a4 Rc5 25.Qd3 Na7? (25...Nc7 26.Ba3 Ne5 27.fe5 Qg5+–) 26.Bd4 R5c7 (26...Nf8 27.Qe3 Rc2 A) 28.Ba7?? Re2 (28...Qe2?! 29.Qe2 Re2 30.Rf2 Rf2 31.Kf2+=) 29.Qe2 Qe2–+; B) 28.Bc2?! Rc2 29.Rf2 Nc8+–; C) 28.Rf2 Re2 29.Qe2 Qe2 30.Re2+–) 27.Ba7 Bg2 28.Kg2 Ra7 29.Ng3 Qh6 30.Ne4 Rf8 31.Qg3 Nh4 32.Kg1 Nf5 33.Qd3 Qg6 34.Kh1 Raa8 35.Rg1 Qh6 36.Rg5 Qh4 37.Nf6 Kh8 38.Rh5 (38...gf6 39.Rh4 Nh4 40.ef6+–) 1–0. Wall,Bill – WildRanger, internet, 2002.

5.Be2 Be7 6.0–0 Nf6 7.a3 0–0 8.d4 d6 9.Nbd2 Nbd7 10.c4 c6 11.c5 dc5 12.dc5 Qc7 13.Qc2 Rfd8 14.Rad1 a5 15.Nb3 ab4 16.ab4 Nd5 17.Bc3 Nc3 18.Qc3 Bf6 19.Nbd4 Ne5 20.Ne5 Be5 21.f4 Bd4 22.ed4 Rd7 23.Rd2 Rad8 24.g3 f6 25.Rfd1 e5 (25...Re7 26.Bf3+=) 26.Bg4 (better is 26.de5!? Rd2 27.Rd2 Rd2 28.Qd2+–) 26...Rd4+= 27.Rd4 ed4 28.Rd4 Rd4 29.Qd4 Bc8 30.Bf3 Be6 31.Qd6 Qd6 32.cd6 Bd7 33.g4 g6 34.f5 g5?? (34...gf5 35.gf5 Combination) 35.Kf2+– Kf7 36.Ke3 Ke8 37.Kd4 Kd8 38.Kc5 h5 39.h3 (worse is 39.Bc6 Bf5 40.gf5 g4+–; worse is 39.gh5 Bf5 40.Bc6 Bh7+–) 39...hg4 40.hg4 1–0. SteveF1953 – retiponziani, ChessWorld.net, 2012.

5.Be2 Ne7 6.0–0 Ng6 7.a3 Nc6 8.d3 d5 (8...a5 9.a4+=) 9.c4+/– bc4 10.dc4 dc4 11.Bc4 Qd1 12.Rd1 Nce7 (12...Bd6 13.Be2 Nge5 14.Ne5 Be5 15.Be5 Ne5 16.Nc3+=) 13.Be2 Rc8 14.Nbd2 c5 15.bc5 Rc5 16.Rac1 Rc1 17.Rc1 Nc6 (better is 17...Kd7!?+=) 18.Ba6!+– Ba6 19.Rc6 Bb5 20.Rb6 Bd7 21.a4! f6 (21...Ba4 22.Rb8 Combination) 22.Ba3?? (better is 22.Rb8 Ke7 23.a5+–) 22...Ba3–+ 23.Rb8 Ke7 24.Rh8 Nh8 25.Nc4 Bd6 26.a5 Nf7 27.Nd4 e5 28.Nb3 Be6 29.Nbd2 Bb4 30.a6 Bd5 31.Kf1? Ba8 32.Ke2? Nd6 33.f3? Nc4 34.Nc4 Bc5 35.Kd3? Kd7 36.e4 Kc6 37.Kc3 Bd4 38.Kb4 Bc5 39.Ka5?? Kc7 40.Kb5 Bd4 41.Na5 Bc3 42.Nb3 Bc6 43.Kc5 Bd4! 44.Nd4 ed4 45.Kd4 Kb6 46.a7 Ka7 47.Kc5 Ba4 48.Kd6 g6 49.Ke6 f5 50.ef5 gf5 51.Kf5 Bc2 52.Kg5 Kb6 53.g4 Kc6 54.f4 Kd6 55.Kf6+= Kd7? 56.Kg7 Ke8?? 57.f5 Ke7 58.Kh7 Kf6 59.Kh6 Be4 60.h4 White prepares g5 60...Bf3 61.g5+= Kf5 62.g6 Bd5 63.g7 Kf6 64.Kh7 Kf5 65.h5 Kg5 66.h6 Be4?? 67.Kh8+– 1–0. Fournier,Frederic – frazayas, Active, 2009.

5.Be2 Nf6 6.0–0 Be7 7.c4 0–0 (7...bc4 8.a3=+) 8.Nc3 (8.Qc2 bc4 9.Qc4 Bd5=) 8...Bb4 (8...bc4 9.a3 d5 10.d3 cd3 11.Bd3=+) 9.d4 (9.cb5 ab5 10.Nb5 Ra5=) 9...Be7 (9...bc4 10.Bc4 Qe7 11.a3=+) 10.d5 (better 10.cb5!? ab5 11.Bb5=) 10...b4–/+ 11.de6? (better 11.Na4–/+) 11...bc3–+ 12.ef7 Rf7 13.Bc3 Rf8 (13...Ne4 14.Bd4 Nc6 15.Bd3–+) 14.Rb1 Bc6 15.Nd4 Ne4 (15...Be4 16.Bd3–+) 16.Ba5 (16.Nc6 dc6 17.Bd4–/+) 16...Bc5 (better 16...Nc5!?–+) 17.Nc6=+ Nc6 (17...dc6!? 18.Qd8 Rd8 19.Bc7 Re8=+) 18.Qd5= Kh8 19.Bc7? (better 19.Qe4 d5 20.Qd5 Qd5 21.cd5 Na5 22.Rfc1=) 19...Qc7 (19...Qe7!? 20.Rb3 Nb4 21.Qd1 Na2 22.Bf3–+) 20.Qe4–/+. Herbert91 – Akrapovik, lichess.org, 2020.

5.Be2 Nf6 6.a3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.Be2).

5.Be2 Nf6 6.d3 Bb4–/+ 7.c3 Be7 8.0–0 0–0 (8...Nc6 9.a4–/+) 9.Nfd2 (9.a4 Nc6–/+) 9...c5 (9...Nc6 10.a4–/+) 10.e4 (10.a4 d5–/+) 10...d5 11.ed5 (11.a4 Qc7–/+) 11...ed5 (11...Bd5 12.c4 Bc6 13.Qb3–+) 12.Bf3 (12.a4 Re8–/+) 12...Qc7 13.c4 (13.Re1 Bd6–+) 13...d4 (13...Nbd7 14.cb5 ab5 15.Nc3–+) 14.Bb7 (14.Na3 Bd6–/+) 14...Qb7–+ 15.Nf3 (15.Re1 Re8–+) 15...Bd6 (15...bc4!? 16.Bc1 cd3 17.Na3–+) 16.Nbd2 Nbd7 (16...Re8 17.a4 b4 18.Qb3–+) 17.Re1–/+ b4 (17...Rfe8 18.Re8 Re8 19.cb5 ab5 20.a4–/+) 18.Ne4 (18.Qa4 Rfe8–/+) 18...Ne4–+ 19.de4 Rfe8 (19...Ne5–+) 20.a3 (20.Qd3 Rad8–/+) 20...Ne5 (better is 20...ba3!? 21.Ba3 Re4 22.Rb1 Re1 23.Qe1–+) 21.Ne5–/+ Re5 22.ab4 Qb4 23.Ba3 Qc4–+ 24.Qg4 Qe6 25.Qe6 Re6 26.Rac1 Rc8 27.Rc4 Bf8 28.Rec1 d3 29.Rd1 Rd6 30.f3 Rd7 31.e5 Rc6 32.f4 d2 33.g4? Rb6 34.Kf2 Rb3 35.Bc5 Bc5?? 36.Rc5–/+ Rb4?? 37.Rc8 (37...Rd8 38.Rd8 1–0. stoker – revbodio, Caissa.com, 2004.

5.a3 Nf6

6.c4 bc4 7.Bc4 d5=.

6.c4 c5 7.bc5 bc4 8.Bc4 Bc5 9.0–0 0–0 10.d4 Bb6 11.Nbd2 Ne4 (11...d6 12.Qe2+=) 12.Ne4 Be4 13.Bd3 (13.d5 Qe7+/–) 13...Bd3 (13...d5 14.Be4 de4 15.Nd2+=) 14.Qd3 Nc6 (14...d5 15.Rab1+=) 15.Rac1 (15.d5 Ne7+=) 15...Ne7 16.Ne5 (16.a4 d6+=) 16...f6 17.Nf3 d5 18.Rc2 Rc8 19.Rfc1 (19.Rc8 Qc8 20.Bc3 a5+=) 19...Rc2= 20.Rc2 (20.Qc2 Qd6=) 20...Qa8 21.Qb3 (21.a4 Rc8=) 21...Qa7 (21...Rb8 22.Qa4=) 22.h3 Rc8 23.Rc8 Nc8 24.Qa4 (24.e4 Qd7 25.e5 Qb5=) 24...Nd6= 25.Qc6 (25.Bc3 a5=) 25...Bc7 (better is 25...Qc7!? 26.Qa8 Qc8 27.Qc8 Nc8=+) 26.Nd2 (26.Qd7!? Bb8 27.Qe6 Qf7 28.Qf7 Kf7 29.Nd2+=) ½–½. Bennett,Hilton Petrie – Gibbons,Robert, NZL–ch105 Hamilton, 1998.

6.d4 d5 7.Bd3 Bd6 8.0–0 Nbd7 9.Nbd2 0–0 10.Ne5 Nb6 (10...Ne4 11.Ne4 de4 12.Be2=) 11.c3 (11.Qf3 Na4 12.Ra2 Nb2 13.Rb2 Ra7=) 11...Na4=+ 12.Rb1 c5 13.Ba1 c4 14.Bc2 Nb6 15.Re1 (15.f4 a5=+) 15...Nbd7 (15...a5 16.Qf3=+) 16.Nd7 Qd7 17.e4 de4 18.Ne4 Ne4 19.Be4 Be4 20.Re4 a5 21.Bb2 ab4 (21...Qc6 22.Rh4=+) 22.ab4=+ Ra2 ½–½. Lowry,Paul – Jirousek,Jim, corr or01–010 E–mail, 2001.

6.d4 Be7 7.c4=.

6.Be2 Be7 7.0–0 0–0 8.c4 bc4 9.Bc4 d5 10.Be2 Nc6 (10...a5 11.b5=) 11.Nc3 (11.Qc2!?+=) 11...d4= 12.ed4 Nd4 13.Nd4 Qd4 14.Qc2 c5 (14...Qf4!?=+) 15.Na4+= Qe4 16.Qe4 Ne4 17.Nc5 (17.Rfc1 Nd2 (< 17...cb4 18.Rc7+/–) 18.Nc5 Bc5 19.bc5 Nb3=) 17...Bc5 (17...Nc5 18.bc5 Bc5 19.Rab1=+) 18.bc5= Nd2 (18...Nc5 19.Be5=) 19.Rfd1 Nb3 20.Rab1 Be4 (20...Nc5? 21.Bd4 Rfc8 22.Bc5 Bg2 23.Kg2 Rc5 24.Rd7+–) ½–½. Roos,Bernhard – Pratsch,Thomas, DESC, 2001.

5.c4 Bb4??

6.Bg7+– bc4 7.Bc4 Nf6 8.Bh8+–.

6.cb5?! Nf6=.

6.Bg7 c6 7.cb5 Qa5 8.b6 (8.ba6 Na6 9.Bh8 Be7+–) 8...d5 9.Bh8 Nd7 10.Nc3 Nb6 (10...Ne7 11.Qc2 Ng6 12.Bg7+–) 11.Rb1 f6 (11...Ne7 12.Qb3 Bc5 13.Nd1+–) 12.Qb3 c5 13.a3! Bc3 (13...Qa3 14.Qa3 Combination; 13...Ba3 14.Qb6 Pinning (14.Qb6 Deflection)) 14.Qc3 Qc3 15.dc3 Nd7 16.Rb7 a5 (16...Nh6 17.Rg1+–) 17.Bb5 Rd8 18.Ke2 (18.Nd2 Ke7+–) 18...h6 (18...Ke7 19.Rd1 h6 20.e4+–) 19.Rd1 c4 20.Nd4 Ne7 21.Ne6 Rb8 22.Rb8 Kf7 23.Bd7 (23.Bd7 Nf5 24.Nd8 Kg6 25.Bf5 Kf5 26.Rd5 Kg6 27.Rb7 f5 28.Rg7 Kf6 29.f4 a4 30.Rd6) 1–0. Janek – Tundja, internet, 2017.

6.Bg7 Bd2 7.Nfd2 Bg2 8.Bg2+–.

6.Bg7+– f6 7.Bh8 Qe7 8.cb5 ab5 9.Bb5 c6 10.Be2 Nh6 11.Qb3 Qf8 12.0–0 (better is 12.Qb2 Qh8 13.Qb4 Bc8+–) 12...Ba6 13.Ba6 Na6 14.Qb2 (better is 14.a3 Bd6 15.Qd3 Bh2 16.Kh2 Qh8+–) 14...Qh8 15.a3 Be7 16.Qb7 Kf7 17.Qd7 Ng4 18.Qc6 f5 19.Nc3 Nc5 20.d4 Nd3 21.Ne2 Ra3 22.Ra3 Ba3 23.Qc3 Ngf2 24.Qa3 Qb8 25.Rf2 Nf2 26.Ne5 Kf6 1–0. combijack (1760) – cichociemny, gameknot.com, 2009.

6.Bg7+– Nf6 7.Bh8 Ne4 (7...bc4 8.Bc4 Nc6 9.Nc3+–) 8.cb5 f6 9.ba6 Ba6 (9...Na6 10.a3 Ba5 11.Nd4+–) 10.Ba6 (better is 10.Nd4 Ke7 11.Qg4 Qh8 12.Qe4+–) 10...Kf7 (10...Na6 11.a3 Be7+–) 11.Ne5 Kg8 12.Qg4 Kh8 13.Nf7 1–0. pcmvr – LAME WOLF, internet, 2005.

5.c4 bc4

6.Bc4 Bb4?? 7.Bg7 d5 8.Be2+–.

6.Bc4 Bb4?? 7.Bg7 d5 8.Bh8?! dc4 9.Qa4 Nc6+–.

6.Bc4 Bb4?? 7.Bg7 Bf3 8.Qf3+–.

6.Bc4 Nc6 7.a3+= Nf6 8.0–0 d5 9.Be2 Be7 10.d4 0–0 11.Nbd2 Ne4 12.Ne4 de4 13.Nd2 f5 14.f3 ef3 15.Nf3 h6 16.Qb3 Na7 (better is 16...Qd6!?+/–) 17.Qe6+– Kh8?? (better is 17...Kh7+–) 18.Ne5 (18.Ba6 Bd5 19.Qg6 Rf6=) 18...Bd5 (18...Kh7 19.Qg6 Kg8 20.Rf5+–) 19.Ng6 (better is 19.Qe7! Qe7 20.Ng6 Kh7 21.Ne7 Be4+–) 19...Kh7 20.Nf8 (20.Qe7?! Kg6 21.Qd8 Rad8 22.Ba6 Rde8+–) 20...Bf8 21.Qf5 g6 22.Qg4 h5 23.Qh3 Bd6 24.Bh5! Qg5 25.Bf3 Kg7 26.Bd5 Qd5 27.Qd7 Kg8 28.Qg4 Kg7 29.e4 Qb3 30.Rf2 Nb5 31.d5 Nc3 32.Qe6 Rf8 33.Rf8 (33.Rf8 Bf8 34.Qe5 Kg8 35.Bc3 Qc3 36.Qc3+–) 1–0. Sixty4 – Zafonic, playchess.de, 2004.

6.Bc4 Nc6 7.a3+= Nf6 8.0–0 Be7 9.Qc2 0–0 10.Be2 Ne8 11.Nc3 d5 (11...Nd6 12.Rfc1+=) 12.Na4 Bf6 (12...Nf6 13.d4+/–) 13.d4 Be7 14.Rac1 (14.Nc5 Bc5 15.dc5 Nf6+/–) 14...Na7 (14...Nf6 15.Bd3+/–) 15.Bd3+– g6 16.Nc5 Bc5 17.dc5 c6 (17...Qe7 18.Rfd1+–) 18.Qc3 f6 19.e4 Nb5 20.Qb3 Nbc7 21.Rfe1 Ng7 22.Rcd1 Nh5 23.Bc2 Ng7 24.Qe3 Nge8 25.Qh6 Qd7 26.Qh3 Rd8 27.Qh6 Qg7 28.Qh4+– Qd7 29.g4 Rf7 30.g5 Qe7 31.gf6 Nf6 32.Ne5 Nh5+/– 33.Qe7 Re7 34.Ng4 Ree8 35.Re3 Nb5?? 36.Nh6+– Kf8 37.Rf3 (37...Nf6 38.ed5 ed5 39.Rf6 Kg7 40.Rg6 Kf8 41.Rg8 Ke7 42.Rg7 Ke6 43.Bf5 1–0. Sternik,Ryszard – Hudziak,Stanislaw, Poland, 1990.

6.Bc4 Nf6 7.0–0 Bb4=+ 8.Qb3 Nc6 9.a3 (9.Ne5 Rb8=+) 9...Be7 10.Bc3 Rb8 11.Qc2 d5 (11...0–0 12.Rc1–/+) 12.Bd3 Qd6 13.Bb2 (13.Rc1 e5 14.Be2 d4 15.ed4 ed4–/+ (15...Nd4?! 16.Nd4 ed4 17.Qa4 Qd7 18.Qd7 Nd7 19.Bd4=+)) 13...e5 14.Be2 (14.Nh4 e4 15.Be2 Qe6–+) 14...e4 15.Nd4 Nd4 16.Bd4 c5 17.Bb2 0–0 18.a4 (18.f3 d4 19.fe4 Be4–+) 18...d4 19.ed4 cd4 20.d3 Rfc8 21.Qd2 (21.Qd1 Rd8–+) 21...ed3 22.Qd3 Bg2! 23.Kg2 (23.Ba3 Be4 24.Qe4 Ne4 25.Bd6 Bd6 26.Ba6 Rc6–+) 23...Rb2 24.Rd1?! (24.Qa6 Qd5 25.Kg1–+) 24...Nd5 25.Qd4 (25.Qa6 Ne3! 26.Kg1–+) 25…Nf4 (26.Kh1 Qc6 27.f3 Ne2–+) 0–1. Buckingham,William – Jirousek,Jim, corr or01–011 E–mail, 2001.

6.Bc4 Nf6 7.a3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

6.Bc4 d5

7.Bb3 c5 8.bc5+/– Qa5 9.Ne5 Qc5 10.Nf7! Kf7 11.Qh5 g6 12.Qf3 Ke7 (12...Ke8 13.Bh8 Nc6 14.Nc3+–) 13.Ba3 (13...Nd7 14.d4 Qa3 15.Na3+–; < 13.Bh8 Qc1 14.Bd1 Nc6+–) 1–0. Stanitz,Antal – Deneuville,Christian, corr sok, 1995.

7.Bb3 Nf6!?=.

7.Be2 Bb4?? 8.Bg7 Nd7 9.Bh8+–.

7.Be2 Nd7 8.Nc3 Bb4 (8...Ngf6!? 9.Rb1 Bd6= (9...Bb4? 10.Na4+–)) 9.Nd5 Bd5? (9...Bf8 10.Nb4 Rb8+= (10...Bb4? 11.Bg7 Ngf6 12.Bh8+–)) 10.Bg7+– c5 (10...Ngf6 11.Bh8 Ke7 12.Bf6 Nf6 13.0–0+–) 11.Bh8 Ndf6 (11...Ngf6+–) 12.a3 Ba5 13.0–0 Bc7 (13...Ne4 14.Qa4 Ke7 15.d3+–) 14.Qc2 Qd6 (14...Bd6 15.Rab1+–) 15.Rfc1 Bf3 (15...c4 16.Bg7+–) 16.Bf3 (16.gf3?? Qh2 17.Kf1 Qh1) 16...Qh2 17.Kf1 Bd6 (17...Rd8+–) 18.Ba8 Ne7 (18...Nd5 19.Qa4 Ke7 20.Bd5 ed5+–) 19.Bf6 Nf5 20.Qa4 Kf8 21.Qd7 (21.Qd7 Kg8 22.Rc4+–) 1–0. Adlai – Karl, internet corr, 2018.

7.Be2 Nf6 8.a3 c5 9.bc5 Bc5 10.0–0 0–0 (10...Nbd7 11.d4 Bd6 12.a4=) 11.Qc2 Nbd7 12.Ng5 (12.Rc1=) 12...h6 (better is 12...Rc8!? 13.Nc3 d4 14.ed4 Bd4+=) 13.Bf6+= Nf6 14.Qc5 hg5 15.Nc3 Rb8 (15...Ne4 16.Ne4 de4 17.Rfd1+=) 16.Rab1+/– Qd7 17.Rb4 Rfc8 (17...Rbc8 18.Qd4+/–) 18.Qd4 (18.Qa7 a5 19.Qa5 Ra8+/–) 18...Bc6 (18...a5 19.Rb5+=) 19.f4 (19.Ba6!? Re8 20.Qe5+–) 19...gf4 20.Rf4 Bb5 21.Bb5 ab5= 22.Ne2 Rc4 23.Qe5 Rbc8 24.Rh4 Rb4 25.ab4 Rc4 26.Qb8 Qe8 27.Qe8 Ne8 28.Rc4 dc4 29.Nd4 Nd6+= 30.Kf2 e5 31.Nc6 f6 32.Ke2 Kf7 33.d3 cd3 34.Kd3= Ke6 35.e4 g6 36.g4= f5 37.gf5 gf5 38.ef5 Kf5 39.Ne7 Ke6 40.Nc6 Kf5 41.Ne7 Ke6 42.Nc6 Kf5 ½–½. hajo (2030) – Fournier,Frederic (1960), Active (5/0), 2004.

7.Be2 Nf6 8.a3 Bd6 9.d4 0–0 10.0–0 Ne4 11.Qc2 Re8 12.Nbd2 Nd2 13.Qd2 Nd7 14.Rfc1 Nf6 15.b5 ab5 16.Bb5 Ne4 17.Qc2 Re7 18.a4 Ra5 19.Ba3 Ba3 20.Ra3 Ba6 21.Ba6 Ra6 22.a5 c6 23.Ne5 Qd6 24.Qc6 Rc6 25.Rc6 Qb8 26.Ra1 Re8 27.a6 Qb2 28.Rcc1 Qf2 29.Kh1 h5 30.a7 Ra8 31.Rcb1 Qe3 32.Rb8 Kh7 33.Ra8 Nf2 34.Kg1 Nd1 35.Kh1 Qe1 0–1. Zimmer – Recknagel, corr 1985.

7.Be2 Nf6 8.a3 Be7 9.Qc2 0–0 10.h4 Nbd7 11.Nc3 e5 12.0–0–0 (12.d4 e4 13.Ne5 Bd6 14.Nd7 Nd7=) 12...Rc8 13.d4 e4 14.Ng5 h6 15.Nh3 Nb6 16.g4 Nh7 17.h5 c6 18.Kb1 Qc7 19.Rdg1 Nc4?? (better is 19...Ra8–/+) 20.Bc4+/– dc4 21.Nf4 (better is 21.Ne4!? c5 22.dc5+/–) 21...a5 22.Ne4 ab4 23.Qc4? (better is 23.ab4 Qb6 24.Qc4 Bb4 25.g5 hg5 26.Ng5+=) 23...ba3–+ 24.Ng6? (better is 24.Bc3!?–+) 24...ab2 25.Nf8 Rf8 26.Rh3 Qb6 27.f4 Ra8 28.Kc2 c5 29.Nc5 Rc8 30.Kb1 Be4! 31.Ka2 Bc5 32.Qa4 b1Q 33.Rb1 Qb1 0–1. combijack (1780) – teerex (1720), gameknot.com, 2013.

7.Be2 Nf6 8.a3 g6 9.0–0 Bg7 10.a4 0–0 11.b5 ab5 12.ab5 Ra1 13.Ba1 Nbd7 14.Bf6 Bf6 15.d4 Qa8 16.Nbd2 c6 17.Qa1 c5 18.Qa8 Ra8 19.Rc1 c4 20.Ne1 Ra5 21.Rb1 Ra2 22.Nc4 Re2 23.Nd6 Ba8 24.Kf1 Ra2 25.b6 Bc6 26.b7 Nb8 27.Nd3 Be7 28.Nc8 Bd8 29.Ne5 Ra6 30.Ke2 Kf8 31.Kf3 Bc7 32.Nc6 Nc6 33.g3 Ra4 34.Nb6 Bb6 35.Rb6 Nb8 36.Rb5 Ke7 37.Rc5? (Better is 37.Ke2–/+) 37...Rb4–+ 38.Rc7 Nd7 39.h4 Kd6 40.Rc2 Rb7 41.g4 e5 42.de5 Ke5 43.Ke2 Kd6 44.f4 Rc7 45.Rd2 Nc5 46.Kf3 Ne4 47.Rd1 (47.Ra2–+) 47...Rc2 48.g5 Rh2 (Better is 48...h5 49.gh6 f5–+) 49.Kg4 (49.Re1 Rh4 50.Kg2 h6 51.gh6 Rh6–+) 49...Nf2 (49...f5 50.gf6 h5 51.Kf3 Rf2) 50.Kg3–+ Nd1 51.Kh2 Ne3 (52.Kg3 Nf5 53.Kf2 Nh4–+) 0–1. hal1958 – HOTSUN, HCL–A1325 playchess.de, 2003.

5.c4 Nf6

6.a3 a5=.

6.a3 c5!?

6.a3 c6 7.Be2 Be7 8.0–0 0–0 9.c5 d6 10.d4 d5 (10...a5 11.Nc3=) 11.Ne5 (11.a4 Nbd7+=) 11...Ne4 12.Bf3 Bf6 (12...f6 13.Nd3+=) 13.Be4+/– Be5 (13...de4 14.Qg4 Be5 15.de5+/–) 14.Bd3 (better is 14.Bh7 Kh7 15.Qh5 Kg8 16.de5+–) 14...Bh2? (better is 14...Bc7+=) 15.Kh2+– Qh4 16.Kg1 f5 17.g3 Qh3 18.Re1 (18.a4 Rf6 19.Qf3 Rh6+–) 18...g5 (18...a5 19.Bf1 Qh6 20.a4 ab4 21.ab5 Ra1 22.Ba1 cb5 23.Bb5+–) 19.Bf1 Qh6 20.Kg2 g4 21.Be2 (21.a4 Nd7+–) 21...Rf6 (21...Qh3 22.Kg1+–) 22.Rh1 Qg6 23.Nd2 (23.a4 Nd7+–) 23...Nd7 24.Qc2 e5 (24...a5 25.a4 ab4 26.ab5 Ra1 27.Ra1+–) 25.de5 Ne5 (25...Re6+–) 26.Be5 Re6 27.Bf4 Re4 (27...a5 28.ba5 Ra5 29.Bd3+–) 28.Bd3 (28.Ne4 fe4 29.Rh4 Bc8+–) 28...Rae8 29.Ne4 de4 (29...fe4 30.Be2 Rf8 31.Rh6+–) 30.Qb3 Kg7 (30...Qe6 31.Bc2+–) 31.Be2 Rd8 (31...Qf6+–) 32.Rh6 Qf7 33.Qf7 (33.Rh7 Kh7 34.Qf7 Kh8 35.Rh1) 33...Kf7 34.Rh7 Kf6 35.Rb7 Rd2 36.Kf1 (36.Rh1 Rd7 37.Rd7 Ke6 38.Rhd1 a5 39.R1d6) 36...Rc2 37.Rb6 (better is 37.Rd1 Rc1 38.Rc1 Kg6+–) 37...Rd2 38.Rc6 Ke7 39.Ra6 Kd7 40.Rb6 (better is 40.Bb5 Ke7 41.Bg5 Kf8 42.Rf6 Kg7+–) 40...Kc8 41.Rb5 (41.c6 Rd1 42.Bd1 Kd8 43.Rb5 Ke7 44.Rf5 Ke6 45.Re5 Kd6 46.b5 Kc7 47.a4 Kb6 48.a5 Ka7 49.b6 Ka6 50.Be2) 41...Re2 1–0. TIROLOCO – badboy1221, Live Game Caissa's Web, 2004.

6.cb5 Bb4 7.ba6 (7.a3 Be7=) 7...Ba6 (7...Na6 8.a3 Be7 9.Be2=) 8.Ba6 Na6 9.0–0 d5 10.Ne5 Nb8 11.Qe2 (11.Qb3 Bd6=) 11...c6 (11...0–0 12.d3=) 12.Rc1 Qb6 (12...Bd6 13.Ng4=) 13.Ng4 Nbd7 14.Bf6 (14.Nf6 gf6 15.d3 Bd6+=) 14...Nf6 (14...gf6 15.h3=) 15.Nf6+= gf6 16.Qg4 h5 17.Qf3 f5 18.Qf4 (18.d4 Ra5+=) 18...Kd7 (18...c5 19.a3 Rg8 20.Qh6=) 19.Nc3 Bc3 20.dc3 (< 20.Rc3 Ra2 21.Rcc1 Rha8 22.Ra2 Ra2=+) 20...Rhb8 (20...Ra3 21.c4+=) 21.Qh4 Qb2= 22.Rf1 Qc3=+ 23.Qh5 Qf6 24.Rfd1 Ra3–/+ 25.g3 Rb2 26.Rab1 Raa2 27.Rb2 Rb2 28.Ra1 Rb7 29.Ra8 c5 30.Qh7 Kc6 31.Qg8 Kb6 32.Qe8 Qb2 33.Qd8 Kb5 34.Ra5 Kb4 35.Qa8 Qc2 36.Ra1+– Rd7 37.Qa5 Kc4 38.Qa3 Kb5 39.Qa6 Kb4 40.Qb6 Kc4 41.Rb1?? Kd3=+ 42.Kg2 d4?? 43.Qb5+/– Ke4 44.Qd7?? Qb1–/+ 45.Qc6 Kd3 46.ed4 cd4 47.h4 Ke2 48.Qf3 Ke1 49.h5 Qc1 50.Qd3 Qc3 51.Qc3 dc3 52.h6 c2 53.h7 c1Q 54.h8Q Qc6 55.Kg1 Qc5 56.Qa1 Ke2 57.Qb2 Kf3 58.Qb7 Qd5 59.Qf7?? Qd1–+ 60.Kh2 Qf1?? 61.Qb7= Kf2 62.Qb6 Kf3 63.Qb7 Kf2 ½–½. Le Roux,Frank – Beauvineau,Arnauld, corr TH/96/02, 1996.

6.cb5 ab5 7.a3 c5 8.bc5+– Bc5 9.Bb5 0–0 10.d4 (10.0–0 Ra5 11.Be2 Bf3 12.Bf3 d5+–) 10...Qa5+= 11.Nc3 Ne4 12.dc5 (better 12.Qd3!? Bd6 13.0–0 Nc3 14.Bc3+=) 12...Nc3=+ 13.Bc3 Qc3 14.Nd2 (14.Kf1 Bf3 15.gf3 Rc8=+) 14...Qc5 15.a4 Bg2 16.Rg1 Bh3 (16...Bc6 17.Rc1 Qe5 18.Qg4=+) 17.Rc1 (better 17.Qf3 Qd5 18.Qg3+–) 17...Qd6?? (17...Qa7 18.e4 f5 19.e5=) 18.Qh5?? (18.Qf3 Qh2 19.Rh1 Bg2 20.Rh2 Bf3 21.Nf3 d5+–) 18...Qh2?? (better 18...Bf5=+) 19.Qg5 (better 19.Rg3 Qh1 20.Nf1+–) 19...g6+= 20.Qg3 Qg3 21.Rg3 Bf5 22.e4 Be4 23.Ne4 d5 24.Nf6 Kg7 (better 24...Kh8+–) 25.Nd7?? (better 25.Ne8 Re8 26.Be8+–) 25...Nd7= 26.Bd7 Rfd8 (26...Ra7 27.Bc6=) 27.Bb5 (27.Rc7 Ra6+=) 27...Rdb8 (27...Ra7 28.Ra3=) 28.Rgc3 (28.Rc7 h5=) 28...Ra5 (28...h5 29.Rc7=+) 29.Rc7 Rbb5 (29...Kf6 30.R1c3 Rf8 31.Rf3 Kg7 32.Bd7+=) 30.ab5+– Rb5 31.R7c5 (31.Re7!? g5 32.Rcc7+–) 31...Rb4 (31...Rc5 32.Rc5 g5 33.Ke2=+) 32.R5c2 Re4 33.Re2 (33.Kf1 h5=) 33...Rf4 (33...Re2 34.Ke2 g5 35.Kd3=+) 34.Rd1 (34.Rc7 Rf6=) 34...Rf5 (34...h5 35.Ra2=+) 35.Rd3 (35.Re3 g5=) 35...h5 36.Rg3 (36.Rh3 Rf4=) 36...g5 37.f3 (37.Rh3 h4=+) 37...Kg6 38.Kf2 (38.Rd2 h4 39.Rh3 Kh5=+) 38...e5 (38...d4 39.Rg1=+) 39.Kg2 (39.Ke3 h4 40.Rg4 Rf6=) 39...f6 40.Rh3 (40.Rd2 d4–/+) 40…d4 0–1. PolandSKA_HUSARIA (2015) – TwelveTeen (2500), lichess.org, time forfeit, 2017.

6.c5 a5 7.a3 ab4 8.ab4 Nc6 9.Bb5 (9.Ra8 Ba8 10.Bb5 Nb4=) 9...Nb4 10.Bf6 (10.Ra8 Ba8 11.d4 Be7=) 10...gf6 (10...Qf6 11.Ra8 Ba8 12.d4=) 11.Ra8+= Qa8 12.d4 Qa5 13.Qa4 (13.Be2 Nc2 14.Kf1 Qa4=) 13...Qa4 14.Ba4 Rg8 15.Kf1 Bh6 16.Rg1 (16.Nc3 Ke7=) 16...Ke7 (16...Ba6!? 17.Ke1 Nd3 18.Kd2 Nf2=+) 17.Nc3 Ra8 18.Bd1 (18.Ke2 Ba6 19.Bb5 Bb5 20.Nb5 Ra2 21.Nd2 Nd5=) 18...Ra1 19.Nd2?? (better is 19.Ke2=) 19...Ba6–+ 20.Ne2 (20.Nc4 Bc4 21.Ke1 Nc2 22.Kd2 Nd4 23.f4–+) 20...Rd1 0–1. Hall,PJ – Heperi,DJN (1610), Dunedin New Year op, 1999.

6.c5 Nc6 7.a3 d6 8.d4 Be7 (8...dc5 9.bc5 Be7 10.Bd3=) 9.Nc3 0–0 10.Be2 dc5 11.dc5 Qd1 (11...Qc8 12.0–0=) 12.Rd1 Rfd8 (12...Rad8 13.Rd8 Rd8 14.0–0=) 13.0–0 h6 (13...e5 14.e4=) 14.h3 (14.e4 e5+=) 14...Kf8 (14...e5 15.Rfe1=) 15.Nd2 (15.Bd3 e5+=) 15...Rd7= 16.Bf3 Rad8 17.Nb3 Nd5?? (better is 17...e5=) 18.Nd5+– ed5 19.Bg4 g6 20.Bd7 Rd7 21.Rd2 f5 22.Rfd1 Nd8 (22...Kf7 23.Kf1+–) 23.Nd4 (23.Na5 c6+–) 23...c6 (23...Kf7 24.Kf1+–) 24.Nf3 Nf7 25.Nd4?? (25.Kf1 a5+–) 25...Nd8 26.Ne2 (26.Kf1 a5+–) 26...Kf7 27.f3 Bg5 28.Rd3 Re7 29.Kf2 Bc8 30.f4 Bh4 31.g3 Bf6 32.Bf6 Kf6 33.Nd4 Rb7 34.Rb3 Rb8 35.Ra1 Rb7 36.Kf3 h5 37.Rb2 Re7 38.Ke2 Rb7 39.a4 Rc7 40.ab5 cb5 41.Rc2 Nc6 42.Nc6 Rc6 43.Rd2 Be6 44.Kf3 Ke7 45.g4 fg4+/– 46.hg4 Bg4 47.Kg3 Be6 48.Rd4 Kf6 49.e4 de4 50.Re4 Bc8 51.Re8 Kf7 52.Rc8 Rc8+/– 53.Ra6 Rd8 54.Rb6 Rd3 55.Kh4 Rd4+= 56.Rb5 Rf4 57.Kg3 Rc4 58.Rb6 g5 59.c6 Rc3 60.Kh2 Rc2 61.Kh3 Rc3 ½–½. Liepert,Luise – Svendsen,Hannelore, 3 Laender–Cup (Women), 1992.

6.a3 bc4

7.Bc4 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

4.Nf3 f6

5.a4 e5 6.ab5 (6.c3 ba4 7.Ra4 c5=) 6...ab5 (6...Bb4 7.Bc3 Bc3 8.Nc3+=) 7.Ra8+= Ba8 8.Bb5 Bb4 9.0–0 c6 (9...Bc6 10.Bc6 Nc6 11.d4+=) 10.Be2 Qb6 (10...d5 11.d4 e4 12.Nfd2+=) 11.Nc3 Bc5 (better 11...d5+=) 12.Na4 Qb4 13.Nc5 Qc5 14.Qa1 Qb6 (14...Bb7 15.Rb1 A) 15...Qc2?? 16.Be5 Na6 17.Rb7+– (17.Ba6?! Ba6 18.Rb8 Ke7+–); B) 15...Na6 16.Be5 Qa7+–) 15.Be5 (15.Qa8?! Qb2 16.Bc4 Nh6+–) 15...fe5 (15...Na6 16.Rb1 Qd8 17.Bd6+–) 16.Rb1 (16.Qa8?! d6+–) 16...Qa6 (16...Qb7 17.Qe5 Ne7 18.Rb7 Bb7+–) 17.Rb8 (17.Rb8 Qc8 18.Rc8 Kf7 19.Ne5 Ke7 20.Qa3 c5 21.Qc5 Ke6 22.Re8 Kf5 23.Nd7 Bd5 24.Qd5 Kg6 25.Qh5) 1–0. GuestKMYB – GuestVHBW, freechess.org, 2018.

5.c4 Bf3 6.Qf3+/– (6.gf3?! bc4 7.Bc4 d5 8.Qa4 c6=) 6...c6 7.Bd3 g6 8.Qh3 e5? (better is 8...Bg7!?+/–) 9.Bg6!+– Ke7 (9...hg6 10.Qh8 Pinning (10.Qh8 Deflection)) 10.d4 ed4 11.Bd4 d5?? (11...bc4 12.Na3 Nh6+–) 12.Bc5 Qd6 13.Bd6 Kd6 14.c5 (better is 14.Qc8 Nd7 15.c5 Ke7 16.Qa8 hg6 17.Qc6 Ne5 18.Qd5 Bg7+–) 14...Kc7 15.a4 Nh6 16.Bh5 (16.Bd3 ba4 17.Qe6 Nd7+–) 16...ba4 17.Ra4 a5 18.0–0 Nd7 19.Qe6 Bg7 (19...Rg8 20.Nc3 Rg7 21.b5 Nc5 22.Qc6 Kb8 23.Qb6 Nb7 24.Nd5+–) 20.Qd6 Kd8 21.Qc6 Ke7 22.Qd6 (22.Nc3 Rhb8 23.Qd6 Kd8 24.Nd5 Nf7 25.Bf7 Ra7 26.Qe7 Kc8 27.c6 ab4 28.Qe8) 22...Kd8 23.c6 Kc8 24.Qd7 (24.Qd7 Kb8 25.Qb7) 1–0. AD – Thrustnicely, playchess.de, 2004.

5.c4 h5? 6.cb5+– a5 (6...e5 7.a3+–) 7.a3 (7.ba5 Ra5 8.Bd3 Nh6+–) 7...e6 (7...ab4 8.Be2 ba3 9.Ne5+– (9.Na3?! Bd5+–; 9.Ra3?! e5 10.Ra8 Ba8+–; 9.Ba3?! g6+–)) 8.Qc2 (8.ba5 Ra5 9.d4+–) 8...Qe7? (better 8...ab4!? 9.Qg6 Ke7+–) 9.Bd3 (9.Qc7 d5 10.Qe7 Ne7 11.ba5 Ra5+–) 9...f5 (9...Qd6 10.ba5 Bf3 11.gf3+–) 10.0–0 (better 10.Qc7!? d6 11.b6+–) 10...Bf3+– 11.gf3 Qd6 12.Kh1 (better 12.ba5 c6 13.a6+–) 12...g5?? (better 12...ab4 13.Rg1 A) worse 13...ba3 14.Ba3 Qd5 15.e4+– (15.Qc7?! Qf3 16.Rg2 Qd1 17.Rg1 Qf3 18.Rg2 Qd1 19.Rg1 Qf3=); B) 13...Ne7+=) 13.Bh8+– g4 (13...ab4 14.ab4 Ra1 15.Ba1+–) 14.fg4 hg4 15.Bf5! Qd5 (15...ef5 16.Qf5 Combination) 16.e4 (better 16.Be4 Qb5 17.Nc3 Qa6+–) 16...Qb5 17.Bg6 (better 17.Nc3!? Qb6 18.ba5 Qa5 19.Bg4 Nh6+–) 17...Kd8 18.Nc3 Qf1 1–0. GuestMMBV – GuestMPXH, freechess.org, 2017.

5.Be2 Nc6 6.0–0 e5 7.a3 a5 8.c3 a4? (8...Ba6 9.Bd3+=) 9.c4 (better is 9.Bb5!? e4 10.Nd4+–) 9...bc4+= 10.Bc4 Ba6 11.d3 Bc4 12.dc4 e4 13.Nd4 Nd4 14.Bd4 Nh6 15.Nc3 16.c5 Ng4 17.Nd5 c6 18.Nf4 Be7 19.h3 Nf6 20.Rb1 g5 21.Nh5 0–0 22.Nf6 Bf6 23.Bf6 Rf6 24.Qe2 d5 25.cd6 Qd6 26.Rfd1 Qe5 27.Qc4 Kg7 28.Rd7 Kg6 29.Qc5 (better is 29.Rbd1+/–) 29...Qc5= ½–½. valpa – footyhead, HCL–C1881 playchess.de, 2003.

5.Be2 g5?? 6.0–0 (better is 6.Ng5 Bg7 7.Bh5 Kf8 8.Nf7+–) 6...g4 (6...e5 7.a3+/–) 7.Ne1 h5 8.Nd3 Nc6 9.f3 a5 (9...e5 10.a3+=) 10.a3 (10.fg4 hg4 11.Bg4 e5+/–) 10...ab4 11.ab4 Ra1 12.Ba1 d5 (12...g3 13.h3+/–) 13.Nf4 (13.Nc5 Qc8 14.Bb5 e5+–) 13...d4 (13...Nb4 14.Ng6 Rh6 15.Nf8 gf3 16.Bb5 (worse is 16.gf3 Kf8 17.c3 Nc6=) 16...Kf8 17.Qf3+/– (17.gf3?! c5=)) 14.Ne6 (14.Bb5 de3 15.Ne6 Qd6+–) 14...Qd6+/– 15.Nd4 (15.Nc5 Ba8 16.Bb5 de3+–) 15...Nd4 16.Bd4 Qb4 17.Bc3 Qc5 18.fg4 h4? (better is 18...hg4!? 19.Bg4 b4+=) 19.Bf3 Bf3 20.Rf3 (20.Qf3 Kd7+–) 20...Nh6 21.d4 Qc4 22.Qd3 (better is 22.h3!?+/–) 22...Qd3= 23.cd3 Ng4 24.e4 e5 (24...Bh6 25.Bd2=) 25.de5 (25.h3 ed4 26.Bd4 c5+=) 25...Ne5 (25...b4 26.Bb2 Ne5+= (worse is 26...fe5 27.h3 Bc5 28.d4 Bd4 29.Bd4 ed4 30.hg4+=)) 26.Rf6+= Nd3 27.Rf3 (27.Rf5!? Rg8 28.Rb5=) 27...Bc5+= 28.Kh1? (better is 28.Kf1 Rf8 29.Rf8 Bf8 30.Ke2 Nf4 31.Kf3+=) 28...Nf2?? (better is 28...Rf8–+) 29.Rf2!+– Bf2 30.Bh8 c5 31.Be5 c4? 32.g3 hg3 33.hg3 Bg3 1–0. Valpa – Footyhead, playchess.de, 2004.

4.Nf3 Nf6

5.a3 g6 6.c4 c6 7.Be2 Bg7 8.0–0 0–0 9.d3 Re8 10.Qc2 d6 11.Nbd2 Nbd7 12.Nb3 e5 13.Na5 Rb8 14.cb5 cb5 15.Nb7 Rb7 16.Rac1 Nb6 17.Qd2 Qd7 18.Rc2 Rc8 19.Rfc1 Rc2 20.Rc2 Rc7 21.Rc7 Qc7 22.Bd1 Nfd5 23.Bb3 h6 ½–½. Pcmvr – HOTSUN, playchess.de, 2004.

5.a3 g6 6.c4 Bg7 7.cb5+– ab5 8.Bb5 0–0 9.Be2 Ba6 10.0–0 Be2 11.Qe2 c5 (11...e6!?+–) 12.bc5+– Qa5 13.d4 Nc6 14.Nbd2 Rfb8 15.Nc4 Qa6 16.Rfe1 Na5 (16...Nd5 17.e4 Nf4 18.Qc2+–) 17.Nb6 Qe2 18.Re2 Ra7 19.Bc3 Nb3 (19...d6 20.Ba5 Ra5 21.Nc4+–) 20.Rb1 Na5 21.Ba5 (21.Reb2 h6+–) 21...Ra5 22.Reb2 (22.Rb3 Ne4+–) 22...h6 (22...Ra3 23.g4 Rd8 24.Ne5+–) 23.Ne5 (better 23.Rb3!? Rb7+–) 23...Ra3 24.h3 (24.Ned7 Nd7 25.Rb4 Nb6 26.Rb6 Rc8=; 24.Nbd7? Rb2 25.Rf1 Nd7 26.Nd7 Rc2–+) 24...d6 25.Nc6 (25.Nec4!? Ra6 26.cd6 ed6 27.Nd6 Bf8+–) 25...Rb7 26.cd6 (26.Nd8 Rc7 27.c6 d5+–) 26...ed6+– 27.Nc4 Rb2 28.Rb2 Ra1 29.Kh2 d5 (29...Rc1 30.N4a5+–) 30.Rb8 Kh7 31.N4e5 (31.Nd6 Ra6 32.Rc8 Ne4 33.Ne4 de4+–) 31...Ne4+– 32.f3 (better 32.Nd3+–) 32...f6? (better 32...Nd2 33.Kg3 Ra2+=) 33.fe4+– fe5 34.ed5 ed4 35.ed4 Ra5?? (35...Rc1+–) 36.Na5 (36.Na5 Bd4 37.Nc4+–) 1–0. BeepBeepImAJeep (2640) – meruga123 (2190), lichess.org, 2016.

5.a4 c6 6.ab5 cb5 7.c4 bc4 8.Bc4 e6 9.Qb3 d5 (9...Nc6 10.0–0=+) 10.Bd3 Be7 (10...Nc6 11.b5 ab5 12.Qb5+=) 11.b5 (11.Nc3 Nc6 12.b5 ab5 13.Ra8 Qa8 14.Qb5 0–0=) 11...0–0= 12.0–0 ab5 (12...Nbd7 13.Rc1 Ne4 14.ba6=) 13.Ra8 Ba8 14.Bb5 Bc6 15.Bd3 Nbd7 16.Qc2 Qb6 (16...Bb7 17.Rc1=) 17.Bd4+= Qb7 18.Rc1 Rc8 19.Nc3 Nc5 20.Rb1 Qa8 21.Bf6 Bf6 22.Bh7 Kf8 23.Bd3 (23.h4 g6 24.h5 Ba4 25.Na4 Na4=) 23...Nd3 24.Qd3 e5 25.Qf1 d4 26.Ra1 Qb7 27.Rb1 Qa8 28.ed4 (28.Ra1!? Qb8 29.Rb1=) 28...ed4=+ 29.Ra1? (29.Ne2 Bf3 30.gf3 Qf3=+) 29...Qb7 (better 29...dc3 30.Ra8 Ra8 31.dc3 Bc3–+) 30.Rb1= Qa8 31.Ra1 Qb7 (better 31...dc3 32.Ra8 Ra8 33.dc3 Bc3–+) 32.Rb1= Qa8 33.Ra1 ½–½. GuestHTPN – GuestPGLN, freechess.org, 2019.

5.a4 c6 6.c4 bc4 7.Bc4 d5 8.Be2 Nbd7 (8...e6 9.Ba3=) 9.0–0 e6 10.b5 ab5 11.ab5 cb5 12.Ra8 Ba8 (12...Qa8 13.Bb5 Bc6 14.Qe2=) 13.Bb5 Be7 (13...Bd6 14.Bf6 gf6 15.Nc3+=) 14.Bf6 gf6 (14...Bf6 15.Qa4 Bb7 16.Rc1+=) 15.Qa4+– Bd6?? (better 15...Bb7+–) 16.Bd7+– Qd7 17.Qa8 (17.Qa8 Qd8 18.Qa4 Qd7 19.Qd4+–) 1–0. onur604 (2320) – owl77 (1995), lichess.org, 2020.

5.a4 c6 6.Be2 d6 7.0–0+= e5 8.c4 (8.Nc3!?+=) 8...bc4=+ 9.Na3 (9.Qc2 d5 10.Ne5 Bb4=+) 9...e4 10.Nd4 d5 11.b5 c5 (11...ab5 12.ab5 Qb6 13.f3–/+) 12.Nf5 Nbd7 (12...Bc8!? 13.Ng3 Bd6–/+) 13.f3= g6 (13...Rg8 14.fe4 Ne4 15.Bf3=+) 14.Ng3 ef3 15.Bf3 Bg7 (15...ab5 16.ab5 Qb6 17.Qe2+=) 16.Nc4+= 0–0 17.Bc3 Rb8 18.Na5 ab5 19.ab5 Qb6 20.Nb7 Rb7 21.Ra5 Ne5 (21...Rfb8 22.Qa4+=) 22.Qa1 (22.Ra6!? Qb5 23.Be2+–) 22...Nf3+= 23.Rf3 Ne8 (23...d4 24.ed4 Nd5 25.Ne2=) 24.Bg7 Ng7 25.Rf6 (25.Ne2 Rfb8=) 25...Ne6 26.Ne2 Qd8 27.Rf3 Qd7 Attacks the isolani on b5 28.Qa4 Rfb8 29.Nc3 Nc7 The pressure on the isolated pawn grows (29...Ng5!? 30.Rf1 Ne4=) 30.b6+= Ne6 31.Qd7 Rd7 32.Na4 c4 33.Rf1 Nd8 (33...Kf8 34.Rb1+=) 34.Kf2 (34.Nc5 Rd6 35.Rb1 Nb7 (35...Rbb6? 36.Rb6 Rb6 37.Ra8+–; 35...Rdb6? 36.Rb6 Rb6 37.Ra8+–) 36.Nb7 Rb7+=) 34...Nc6 (34...Nb7 35.Rb5+=) 35.Rb5+– d4 (35...Rd6!?+–) 36.Rc1+– de3 37.de3 (37.Ke3 Re8 38.Kf2 Rd2 39.Kf1 Ree2–/+) 37...Rd2 38.Kg1 Ra2 (38...Re8!? 39.Nb2 Nd4 40.Nc4 Rg2 41.Kg2 Nb5+–) 39.Rc4+– Ne7 40.b7 Kf8 41.Nc5 (41.Nc3 Rc2+–) 41…Nd5 1–0. onur604 (2265) – egorovchess (2070), lichess.org, 2020.

5.a4 c6 6.Be2 e6 7.c3=.

5.c4 bc4 6.Bc4 d5 7.Bb3 e6 8.a3 c5 9.Ne5 c4 (9...Qb6!?=) 10.Ba4+/– Nbd7 (10...Nfd7 11.Qf3 Qe7 12.0–0+/–) 11.0–0 (better is 11.Qf3!? Bc8 12.Nc4+–) 11...Bd6 12.d3 (12.Nd7 Nd7 13.Bg7 Rg8+=) 12...Qc7 (12...cd3 13.Qd3 0–0 14.Nd7 Nd7 15.Nd2=) 13.f4+= 0–0 14.Nd7 Nd7 15.Qg4 (15.dc4 dc4 16.Qg4 g6+=) 15...g6= 16.dc4 (16.Bd7 Qd7 17.dc4 dc4=) 16...Nb6 17.c5 Na4 (17...Bc5!? 18.bc5 Na4=+) 18.cd6+= Qd6 19.Bd4 Nb6? (19...f6 20.Nd2+=) 20.Nd2 Nc4? 21.Nc4 dc4+/– 22.Bc5 Qd3 23.Bf8 Rf8 24.Rfe1 c3 25.Qd1 Qe4 26.Re2 Bd5 27.Qc2 Rc8+/– 28.Rc1 f5 29.Qe4 Be4+/– (29...fe4?? 30.Rec2+–). wlittle (1645) – vkurpnieks (1650), net–chess.com, 2001.

5.c4 c6 6.Nc3 e6 7.a3 d6 8.g3 Be7 9.Qe2 0–0 10.Bg2 Re8 11.0–0 c5 (better is 11...Nbd7!?+=) 12.cb5+/– ab5 13.bc5 dc5 14.Nb5 (14.Qb5?! Ba6 15.Qa4 Nbd7=) 14...Ba6 (14...Nc6!?+/–) 15.Ne5+– Nd5 16.a4 Bf6 17.Rab1 Nd7 (better is 17...Be5 18.Be5 Nd7+–) 18.Ng4?? (18.Nd7!? Qd7 19.Bf6 gf6+–) 18...Be7? (better is 18...Bb2 19.Rb2 h5=) 19.h4 Rb8 20.Be5 Ne5 21.Ne5 Qc8 22.Qh5 Rf8 23.Rfc1 Nf6 24.Qd1 Nd5 (24...Bb7!? 25.Bb7 Qb7 26.Nd4+–) 25.d4 Rd8 26.Na7 Qc7 27.Nac6 Rb1 28.Rb1 Re8 29.Qh5 (29.Bd5 ed5 30.Qf3 Bf8 31.Qd5 Bc8+–) 29...Rf8? (29...g6 30.Ne7 Re7+–) 30.Bd5+– ed5 31.Ne7 Qe7 32.Rb6 Bc4? (32...Bb7 33.dc5 Ba8 34.Nd3+–) 33.dc5 (better is 33.Nc4 dc4 34.Qc5 Qa7+–) 33...Qc5 34.Nc4 (34.Rc6!? Qb4 35.Nc4 dc4+–) 34...Qc4+/– 35.a5 d4?? (better is 35...Qc5+/–) 36.ed4+– Qd4 37.Qb5 Qd1 (37...h6 38.a6 Qa1 39.Kg2+–) 38.Kg2 Qe1 (38...Qc2 39.a6 Qe4 40.Kh2+–) 39.a6 Qe4 (39...g6 40.Rb8 Qe4 41.Kh2+–) 40.Kh2 Qf3 (40...g6 41.Rb8 Qd4 42.Rf8 Kf8 43.Kg1+–) 41.Qc5 (better is 41.Kg1 Qd1 42.Kg2+–) 41...h6 (41...Qa8+–) 42.a7 Ra8 43.Rb8 Kh7 44.Qb6 (44.Ra8 Qa8 45.Qc7 h5 46.Qf7 Kh6+–) 44...g6 (44...Ra7 45.Qa7 Qd5+–) 45.Ra8 Qa8 46.Qb8 Qf3 47.a8Q Qf2 48.Qg2 Qf5 49.Qgb2 g5 (49...Qh3 50.Kh3 g5 51.Q8h8 Kg6 52.g4 gh4 53.Qhg7) 50.Qb1 1–0. jbloe (2315) – grahamtrue (2265), net–chess.com, 2015.

5.c4 c6 6.c5 e6 7.d4 Be7 8.Be2 0–0 9.0–0 d5 10.Nc3 Bc8 (10...a5 11.a3=) 11.Qc2 (11.a4 Bb7+=) 11...Bd7 (11...a5 12.a3+=) 12.e4 (better 12.a4!?+–) 12...de4= 13.Ne4 Nd5 14.a3 f5 (14...a5 15.Nc3=) 15.Ng3 Bf6 16.Ne5 Be5 17.de5 a5 18.Bc3 ab4 19.Bb4 Nb4 (better 19...Qc7!? 20.Qb2 Bc8=) 20.ab4+– Ra1 21.Ra1 Qg5 22.Qd3 (22.Qc3!?+=) 22...f4= 23.Ne4 Qg6? (better 23...Qe5 24.Ra8 Qd5=) 24.Ra8 Qf7 (better 24...Rd8+–) 25.Ng5 Threatening mate: Qxh7 25...Qe7 (25...Qg6 26.Qg6 hg6+–) 26.Qh7 1–0. aravind555 (1755) – sahidgahdez (1810), lichess.org, 2020.

5.c4 c6 6.Be2 e6 7.c5 d5 (7...a5 8.a3=) 8.d3 Nbd7 9.0–0 a5 10.a3 Be7 11.Ne5 0–0 12.Nd7 Qd7 13.Nd2 Ne8 14.Nf3 Nf6 15.Ne5 Qc7 16.Bc3 a4 17.g3 Nh5?? (better is 17...Nd7 18.Nd7 Qd7=) 18.Bh5+– Bf6 (18...Bc8 19.f4+–) 19.f4 g6 20.Bf3 Be7 (20...Bg7 21.Qe2+–) 21.Ng4 Rad8 (21...f6 22.Qe2+–) 22.Qc2 (22.Nh6) 22...h5 (22...f6 23.Rae1+–) 23.Nf2 (better is 23.Nf6!? Bf6 24.Bf6 Rd7+–) 23...f6 24.Rfe1 Bc8 25.e4 e5 26.fe5 fe5 27.ed5 cd5 28.Be5 Qc6 29.Bb2 Rf3 30.Re7 Rd7 31.Rd7 Bd7 32.Qe2 Rf7 33.Qe5 Kf8 34.Re1 (34.Re1 Rh7 35.Qg5+–) 1–0. Valpa – Wilmy, playchess.de, 2005.

5.c4 Nc6 6.Qb3 d5 7.c5 g6 8.Be2 Bg7 9.Na3 0–0 10.0–0 Ne4 11.Bg7 Kg7 12.d3 Nf6 13.Nc2 Kg8 14.Qb2 a5 15.a3 ab4 16.ab4 Ra1 17.Ra1 Qd7 18.d4 Ra8 19.Bb5 Ne4 20.Bc6 Bc6 21.b5 Ra1 22.Qa1 Bb5 23.Ne5 Qe6 24.Qa8 Kg7 25.Nb4 Qf5 26.f3 Nf6 27.Nd5 Nd5 28.Qd5 e6 29.Qb7 Bd3 30.Qc7 Bb5 31.Qb7 Be8 32.c6 Bc6 33.Qc6 Qb1 34.Kf2 Qb2 35.Kg3 h5 36.Qd7 Qb8 37.Qf7 Kh6 1–0. valpa – Nylson, playchess.de, 2002.

5.c4 d6 6.cb5 e5 7.a4 Be7 8.Be2 0–0 9.0–0 (9.ba6 Na6 10.b5 Bf3 11.Bf3 e4+–) 9...Nbd7 (9...ab5 10.Bb5 e4 11.Nd4+–) 10.Nc3 (10.ba6 Ba6 11.b5 Rb8+–) 10...d5 (better 10...ab5!? 11.Bb5 c6+–) 11.ba6+– Ba6 12.Nb5 (12.b5!? Bb7+–) 12...Bb4 (12...c6!? 13.Na3 Be2 14.Qe2 Ra4 15.Ne5 Ne5 16.Be5 Rb4+=) 13.Ne5+– Ne5 14.Be5 Bb5 (14...c6!? 15.Nc7 Be2 16.Qe2 Nd7 17.Bg7 Qc7 18.Bf8 Bf8+=) 15.ab5+– Qe7 16.Bb2 (16.d4!? Bd6 17.Bf6 Qf6+–) 16...Ne4+– 17.d3 Nd6 (17...Nd2 18.Re1 Ra1 19.Ba1+–) 18.Qb3 Nb5 19.Qd5 Nc3?? (better 19...Ra1 20.Ba1 Nc3 21.Bc3 Bc3+–) 20.Bc3+– Bc3 (20...Ra1 21.Ba1 c5+–) 21.Ra8 Ra8 (21...g6 22.Rb1+–) 22.Qa8 (22.Qa8 Qf8 23.Qc6+–) 1–0. GuestGBBL – GuestYQQQ, freechess.org, 2017.

5.d4 e6 6.a3=.

5.d4 g6 6.c4+= bc4 7.Bc4 Bg7 8.0–0 0–0 9.Nc3 d6 10.Rc1 Nbd7 11.Ng5 Nb6 12.Bd3 h6 13.Nge4 Ne4 14.Ne4 Nd5 15.a3 a5 16.b5 Rc8 17.Qa4 c6 (17...f5!? 18.Nd2 e6+/–) 18.bc6 Ba8 19.Bb5 Rc7 (19...Qb6 20.Rc2 Rb8+=) 20.Qa5 e6 21.Rc2 Qh4? (better is 21...Ne7 22.Rfc1 d5+–) 22.Nd6 Qe7 23.Ne4 Rfc8 24.Rfc1 f5 25.Nc3 Bc6 (25...Qd8+–) 26.Nd5 Bd5 (26...ed5 27.Bc6 Kh7 28.Qd5+–) 27.Rc7 Rc7 28.Qc7 Qg5 29.g3 Qg4 (29...Bf8+–) 30.Qd8 Kh7 31.Rc8 Qd1 32.Bf1 g5 33.Qg8 Kg6 34.Rc7 Qf3 (34...Qf1 35.Kf1 Bc4 36.Kg2 Bd5 37.Kh3 Bg2 38.Kg2 g4 39.Rg7 Kf6 40.Qf7) 35.Qf7 Kh7 36.Qg7 1–0. Bonetti,Shane – Panchito, ICC, 2002.

5.Be2 e6 6.a3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.Be2).

5.Be2 Ng4 6.0–0 e6 7.h3 Nh6 (7...Nf6 8.c3=) 8.d3 Qe7 9.Nbd2 (9.a3 c5 10.bc5 Qc5+=) 9...Qd6 (better 9...Qb4!? 10.Be5 d6=+) 10.a3+– Bf3 (10...a5 11.ba5 Qa6 12.c4+–) 11.Nf3 (11.gf3?! a5=) 11...Ra7 12.Nd4 Nf5 13.Nf5 ef5 14.Bf3 Ke7?? (14...Nc6 15.c4+–) 15.Qd2 (better 15.Bd4 Kd8 16.Ba7 Nc6 17.Bc6 Qc6+–) 15...Kd8?? (15...Nc6 16.a4 Kd8 17.ab5 ab5 18.Ra7 Na7 19.Ra1+–) 16.Rfe1 (16.Bd4 c5 17.Bc5 Qc7 18.Ba7 Qa7+–) 16...Be7?? (better 16...Nc6+–) 17.Bg7 (17.Bd4 c5 18.Bc5 Qc7 19.Ba7 Qa7+–) 17...Rg8 18.Bh6 (better 18.Bd4 Nc6 19.Ba7 Na7 20.d4+–) 18...Qh6–/+ 19.Kf1 Qd6 20.e4 (20.d4 c6–/+) 20...f4 (better 20...Bg5!? 21.Qd1 Bf6–+) 21.e5–/+ Qe6 22.d4 Bg5 23.d5 Qe8 24.d6 c6 25.Qd4 Rb7 26.Rec1 (26.a4 ba4 27.Ra4 f6=+) 26...Qe6 (26...f6!? 27.ef6 Qf8–/+) 27.Re1–/+ Qc4 (better 27...Re8–/+) 28.Kg1?? (better 28.Qc4 bc4 29.Re4=) 28...Qd4–+ 29.Rac1 Qc4 (29...Bh4 30.Re2–+) 30.Be2 a5! 31.Bc4 (31.ba5 Qa4 Double attack (31...Qa4 Decoy)) 31...bc4 32.c3 (32.ba5 Re8–+) 32...ab4 (32...f3 33.Rcd1–+) 33.ab4 (33.cb4 Ra7–+) 33...Ra7 34.e6 (34.Re4 f3! 35.Rg4 Rg6–+) 34...de6 35.d7 (35.Re4 f3! 36.Rd1 fg2 37.Kg2 Bf6 38.Kf1 Ra3–+) 35...Kd7 (better 35...f3!? 36.Ra1 Ra1 37.Ra1 fg2 38.Kg2 Bf6 39.Kf3 Bc3 40.Rc1 Bb4 41.Rc4–+) 36.Rcd1 Kc7 37.Rd2 (37.Re4 f3!–+) 37...Kb6 (37...f3 38.Rdd1 Ra3 39.Ra1 Rc3 40.Ra7 Kb6 41.Rf7–+) 38.Red1 (38.Rd4–+) 38...Ra1! 39.Ra1 Nd7?? (better 39...f3!? 40.Rc2–+) 40.Rda2?? (better 40.Rd7 Bf6 41.Raa7+–) 40...Ne5 (40...Rb8 41.Ra6 Kc7 42.Re1–+) 41.Ra6 (better 41.Ra7!?=+) 41...Kc7–+ 42.Ra7 Kd6 43.R1a6 (better 43.Rd1 Nd3 44.Rf7–+) 43...Rc8 (43...f3!? 44.g3–+) 44.b5 1–0. alessandrocarvalhaes (1850) – GALA47 (1815), lichess.org, 2020.

5.Ne5 Nc6 6.Nc6 Bc6 7.d4 Nd5 8.Qg4 Nb4 9.a3 Nc2 10.Kd1 Na1 11.Bd3 Nb3 12.Nc3 h5 13.Qf3 Bf3 0–1. guest460 – guest362, ICC, 1999.

3.e3 Na6

4.a3 c5 5.Nc3 += (< 5.Bb5 Bg2 6.Ba6 Bh1–/+).

4.a3 d5 5.Bb5 c6 6.Ba4 e6 7.Nf3 Nf6 8.Ne5 Bd6? 9.Nc6+– Qd7 10.b5 Nc5+= 11.c4?? dc4 12.Nc3?? 0–0 13.Qf3?? a6 14.0–0 ab5 15.Bb5–/+ Ba6 16.a4 Bb5 17.ab5+/– Nb3? 18.Ra8+– Ra8 19.Ne7! Qe7 20.Qa8 Ne8? 21.Ne4 Nc5 22.Nd6 Qd6 23.Qe8 Qf8 24.Qc6 Na4 25.Bd4 f6 26.Qe6 Qf7 27.Qf7 Kf7 28.Ra1 c3 29.dc3 Nb2 30.b6 Nd3 31.b7 Nb4 32.cb4 (32...Kg6 33.b8Q Kf7 34.Qb7 Kg6 35.Qe4 f5 36.Ra6 Kg5 37.h4 Kh5 38.Qf5 Kh4 39.g3 1–0. tschulz – Master1, mySchach.de, 2004.

4.a3 e5 5.Nh3 Nf6 6.Be5 d6 7.Bf6 gf6? (7...Qf6!? 8.d4 c6+/–) 8.Nc3 (Better is 8.Bb5 c6 9.Qf3+–) 8...Bh6?? 9.Qh5 Bg7 10.Qb5 c6 11.Qb7 Nc7 12.Qc6 Qd7 13.Qd7 Kd7 14.Bb5 Nb5 15.Nb5 Rhb8 16.c4 f5 17.Rd1 Re8 18.d4 Re4 19.0–0 a6 20.Nc3 Rg4 21.Nd5 Bh6 22.Nb6 Kc7 23.Na8 Kb8 24.Nb6 1–0. audrey – ambiquad, Live Game Caissa's Web, 2004.

3.e3 c6

4.a4 a6 5.ab5 cb5= 6.Nf3 Qc8 (6...Nc6 7.c3=) 7.c4 (better 7.Bd3!?+=) 7...bc4=+ 8.Be2 (better 8.Na3 d5 9.d3=+) 8...c3 (better 8...e6!?=+) 9.dc3 (9.Bc3 Nc6+=) 9...d5 10.0–0 e6 11.Qb3 (11.Nbd2 Nf6+=) 11...Nc6 12.c4 (12.Rc1 Qd8+=) 12...dc4= 13.Qa4 (13.Bc4 Nb4 14.Ne5=) 13...Qd7 (13...Nf6!?=) 14.Rd1+– (14.Bc4?! Nb4 15.Qd7 Kd7 16.Ne5 Ke8=+) 14...Qc7 15.Bc4 (better 15.Rc1+–) 15...Bb4?? (better 15...Nf6 16.Be5 Qb6+=) 16.Bg7+– Qa5 (16...Nf6 17.Bh8 Ke7 18.Bf6 Kf6 19.Qc2+–) 17.Qb3 Qa1 (17...Qc5 18.Be2 Na5+–) 18.Ba1 Nf6 (18...f6 19.Be6 Rd8 20.Rd8 Nd8 21.Bg8+–) 19.Bf6 Rg8 20.Be6! Be7 (20...fe6 21.Ng5 Double attack (21.Ng5 Decoy)) 21.Bf7 (21.Bf7 Kf8 22.Bg8 Ne5 23.Be5 Bd5 24.Qd5 Rd8 25.Qf7) 1–0. DEFFM – GuestNJMS, freechess.org, 2018.

4.a4 a6 5.Nf3 e6 6.Be2 ba4 (6...Nf6 7.c3=) 7.0–0 Bb4?? (better 7...Nf6 8.Ra4 c5+=) 8.Bg7+– f6 (8...Nf6 9.Bh8 d5 10.d4+–) 9.Bh8 Bf8 10.Nd4 Qe7 11.Bh5 Kd8 12.Ra4 (better 12.Nc3 a3+–) 12...Bg7 (12...c5 13.Nb3+–) 13.Qg4 Bh8 14.Qg8 Kc7 15.Qh8 Qc5 (15...c5 16.Nb5! ab5 17.Ra8 Ba8+–) 16.Qh7 f5 17.Ne6 Kb6 18.Nc5 Kc5 (18...Ra7 19.Rb4 Kc5 20.Qe7 d6 21.Qh4 f4 22.Qf4 Kd5 23.Qf5) 19.Qf5 (19.Qf5 Kd6 20.Qf4 Ke6 21.Re4 Kd5 22.Qe5; 19.Qe7 Kb6 20.Qd8 Ka7 21.Rb4 f4 22.Qb6) 1–0. DEFFM – Vitejvpekle, freechess.org, 2019.

4.a4 a6 5.Nf3 Nf6+=.

4.a4 e6 5.ab5 Bb4?? (better 5...cb5 6.Nf3 a6=) 6.Bg7+– cb5 7.Bh8 f6 (7...Be7+–) 8.Qg4 Qe7 9.Qg8 Qf8 10.Qh7 Nc6 11.Qh5 (better 11.Bb5!? 0–0–0 12.Bg7 Qf7+–) 11...Kd8 (11...Ke7 12.Qh7 Qf7 13.Qh6+–) 12.Bb5 (better 12.Qh4 Ke7 13.Qh7 Qf7+–) 12...Kc7 13.c3 Be7 (13...Bd6 14.Bc6 Bc6 15.Nf3+–) 14.Bc6 Bc6 15.Nf3 Re8 (15...Qh8 16.Ra7! Kd6 17.Qa5 Ra7 18.Qa7+–) 16.Ra7 (better 16.Bg7! Qg8 17.Ra7 Kb8+–) 16...Kb8 17.Qa5 (better 17.Ra2!? Qh8 18.Qa5 Qg8 19.Rb2 Kc8 20.Qa6 Kc7 21.Qb6 Kd6+–) 17...Qh6 (17...Bd8 18.Qa2 Qc5+–) 18.Qc7 1–0. GuestXFHR – GuestSHVZ, freechess.org, 2020.

4.a4 e6 5.Nc3+=.

4.a4 e6 5.Nf3+=.

4.c4 a6 5.Nf3 d5 6.c5 (6.cd5!? Nf6 7.Nc3+/–) 6...a5+= 7.a3 ab4 8.ab4 f6? (8...Ra1 9.Ba1 Nd7 10.Bb2+=) 9.Nh4 (better is 9.Ra8!? Ba8 10.Nc3+–) 9...Ra1+= 10.Ba1 Na6? (better is 10...Nh6+=) 11.Qh5+– Kd7 12.Ng6! Nb4? (12...hg6 13.Qg4 Double attack (13.Qh8 Pinning; 13.Qh8 Deflection; 13.Qg4 Decoy)) 13.Nh8 Nc2 14.Kd1 Na1 15.Qh7 Nh6 16.Ng6 Qa5 (16...Qe8+–) 17.Nf8 Kc7 (17...Ke8 18.Qg7 Qa4 19.Ke1+–) 18.Bd3 (18.Ne6 Kd7 19.Ng7 Qa4 20.Ke1 Nc2 21.Ke2 Qe4 22.Qe4 de4+–) 18...Ng4 (18...Qa4 19.Ke1 Qg4 20.Qg7 Qg7 21.Ne6 Kd7 22.Ng7+–) 19.Ke2 Bc8 (19...Ne5 20.Qg7 Nd3 21.Qe7 Kb8 22.Kd3+–) 20.Qg7 Ne5 21.Qe7 Bd7 (21...Kb8 22.Bh7 Nb3 23.Qf6 Qc7+–) 22.Qd6 Kb7 23.Nd7 Nd7 24.Qd7 Qc7 25.Qc7 Kc7 26.h4 Nb3 27.h5 Nc5 28.h6 Nd3 29.Kd3 1–0. pumpkin (2860) – imgoodbutnotthatgood, net–chess.com, 2015.

4.Nf3 a5 5.a3 a4 6.c4 Ba6 7.cb5+– Bb5 8.Bb5 cb5 9.Nc3 Qb6 10.Rc1 (10.Qe2 Nf6+–) 10...e6 (better 10...Nc6!?+–) 11.Qe2+– Nc6 12.Qb5 Qa7 13.0–0 Nf6 14.d4 Be7 15.Ne5 Ne5 (15...Nd8 16.d5+–) 16.de5 (16.Qe5?! 0–0+–) 16...Ng4 (16...Ng8 17.Qd3 Qa6 18.Nb5+–) 17.h3 (better 17.Qe2 f5 18.Nb5 Qb7 19.Nc7 Kf7 20.Na8 Ra8+–) 17...Nh6 18.Rfd1 0–0 (18...Nf5+–) 19.Rd7 (19.Rd7 Qb8 20.Qb8 Rfb8 21.Re7+–) 1–0. BeepBeepImAJeep – dandy928 (1805), lichess.org, 2018.

4.Nf3 Na6 5.a3 (5.a4 Nf6+=) 5...Nc7 (5...Nf6 6.Nc3=) 6.c4 e6 (6...Nf6 7.Nc3+=) 7.Be2 f5 (7...bc4 8.Bc4 Nf6 9.0–0+=) 8.0–0+/– Nf6 9.h3 (9.Nc3 bc4 10.Bc4 a5 11.ba5 Ba6+=) 9...Be7 10.c5 d5 11.Ne5 Ne4 (11...0–0!?+=) 12.Bh5 g6 13.Ng6 (13.d3!? Nf6 14.Be2+/–) 13...hg6= 14.Bg6 Kd7 15.Bh8 Qh8 16.d4 Nf6 (16...Rg8 17.Bf7 Rg5 18.Qf3=) 17.Qf3 (17.a4 Qg7 18.Bh5 Nh5 19.Qh5 Rh8+=) 17...Rg8+= 18.Bf5?? (18.Bf7 Rg7 19.Be6 Ke6 20.a4–+) 18...ef5–/+ 19.Qf5 Ne6 (19...Kd8!? 20.Nc3–/+) 20.a4–/+ Rg5 21.Qf3 Nc7 22.Nc3 ba4 23.Ra4 Ba6 24.Rfa1 Ne4 25.Ne4= de4 26.Qe4 Qh3 27.Ra6+= Na6 28.Ra6 Qe6?? 29.Ra7 (29…Kd8 30.Qe6 Rg2 31.Kg2 Bc5 32.Qd7 1–0. Olsen,Birger – Pedersen,Birger, Kirkenes Grand Prix op, 1994.

3.e3 Nc6

4.a3 a5 5.ba5 Na5 6.Nf3 (6.Bb5? Bg2 7.Qg4 Bh1 8.Bg7 c6 9.Bc6 Nc6 (9...dc6?! 10.Bh8 Nh6 11.Qg5–+) 10.Bh8 Nh6–+) 6...Nc4 7.Bc4 bc4 8.d3 (8.Nc3 Nf6+=) 8...Qb8 (8...cd3 9.cd3 d6 10.0–0=) 9.Nbd2 Bf3 (9...cd3 10.cd3 Ba6 11.Nb3=) 10.Qf3+/– c6 (10...cd3 11.cd3 c6 12.Rb1+=) 11.Rb1 (better is 11.Nc4!? d5 12.Ra2+/–) 11...cd3+= 12.cd3 e5 13.0–0 Qb5? (13...Qc7 14.Rfc1+=) 14.d4 (better is 14.Nc4!?+–) 14...Qd3+/– 15.Rfd1 ed4 16.Bd4 Qg6 17.Nc4 Ne7? 18.Qf4+– Nd5 19.Rb8 Rb8 20.Qb8 Ke7 21.Bc5 d6 22.Bd6 Kf6 23.Be7! Kf5?? 24.Qe5 Kg4 25.h3 1–0. Fournier,Frederic – Roggenstein,Marc, Coupe Federation, 1996.

4.a3 a5 5.c3 ab4 6.cb4 e6 7.Nf3 Nb4? (better 7...Na7=) 8.ab4+– Ra1 9.Ba1 Bb4?? (9...c6+–) 10.Bg7 1–0. GuestQKPQ – GuestPNTH, freechess.org, 2017.

4.a3 a5 5.c4 bc4= 6.Bc4 (6.b5 Na7 7.Qg4 Nb5 8.Bg7 Nh6 9.Bh6 Bh6 10.Bc4 Nd6=) 6...Ne5 (6...ab4!? 7.Nf3 e6=+) 7.Be5= d6?? (better 7...Bg2 8.Bf7 Kf7 9.Qh5 g6=+) 8.Bb2 (8.Qh5 e6 9.Be6+–) 8...Ba6 (8...Bg2 9.Nf3 c6 10.Rg1 Bf3 11.Qf3+–) 9.Bb3 (better 9.Qf3 Kd7 10.b5+–) 9...c5 (9...c6 10.Qc2 Bb7 11.ba5+–) 10.Bc3 (better 10.Ba4 Qd7 11.Bd7 Kd7 12.Qa4 Ke6+–) 10...cb4 (10...e6 11.Ba4 Ke7 12.b5+–) 11.ab4 (better 11.Ba4 Qd7 12.Bd7 Kd7 13.Qa4 Ke6 14.ab4+–) 11...g6 (11...Nf6 12.Bf6 ef6+–) 12.Bh8 (better 12.Ba4 Qd7 13.Bd7 Kd7 14.Qa4 Ke6 15.Bh8 Rc8+–) 12...f6 (12...e6 13.Ba4 Ke7 14.Bc6+–) 13.Bg8 Bh6 14.Qb3 (14.Ra5 Bb7 15.Bh7 Ra5 16.ba5 Kd7 17.Qg4 Kc7 18.Bf6 ef6 19.Qg6 Bf8+–) 14...Rb8 15.Bf7 (15.Ra5 Bb7+–) 15...Kd7 16.Be6 (16.Qe6 Kc7 17.Nc3 Bb7 18.Nd5 Bd5 19.Qd5 Kd7+–) 16...Ke8 17.Qa4 (17.Ra5 Bb7 18.f3 Kf8+–) 17...Kf8 18.Qa5 Ra8 19.b5 (better 19.Qd8 Rd8 20.Ra6 Bg7 21.Bg7 Kg7+–) 19...Bb7 20.Qd8 Rd8 21.Nf3 Rb8 22.0–0 (22.Nc3 Bg7 23.Bg7 Kg7+–) 22...Be4 23.Nd4 Ke8 24.Nc3 (24.Nc6 Bf5 25.Bf5 gf5 26.Nb8 Kf7+–) 24...Bd3 25.Rfc1 (better 25.Nc6 Bf5 26.Bf5 gf5 27.Nb8 Bg5+–) 25...Bb5 26.Ncb5 f5 27.Rc7 (27.Nc7 Kf8 28.Ra8 Ra8 29.Na8 Be3 30.Rc8) 27...g5 (27...Kf8 28.Rac1 Rd8 29.Rc8 Re8 30.Re8 Ke8 31.Rc8) 28.Raa7 (28.Rac1 Rd8 29.Rc8 Bg7 30.Rd8 Kd8 31.Rc8) 28...Rd8 (28...Kf8 29.Re7 d5 30.Rf7 Ke8 31.Nd6 Kd8 32.Bf6) 29.Re7 (29.Re7 Kf8 30.Rf7 Kg8 31.Rfd7 Kh8 32.Rh7) 1–0. Goldmund,Heike – Di Giandomenico,Pierino, FICGS, 2015.

4.a3 a5 5.Nf3 ab4 6.ab4 Ra1 7.Ba1 Nb4 8.Bb5 Nf6 9.Bc3 (9.Bf6 ef6 10.c3 Nc6+=) 9...Nc6 (9...e6 10.0–0=) 10.0–0 e6 11.Ne5 (11.d3 Be7=) 11...Be7 (11...Ne5!? 12.Be5 Be7=) 12.Nc6 Bc6 13.Bc6 dc6 14.Qf3 Qd6 (14...Qd5 15.Qg3+=) 15.Bf6 Bf6 16.d4 0–0 17.c4 c5 18.d5 (18.Nd2 cd4 19.Ne4 Qe5 20.Nf6 Qf6 21.Qf6 gf6 22.ed4 Rb8=) 18...ed5 19.cd5 (19.Qd5 Rd8 20.Rd1 h6 21.Qd6 Rd6 22.Rd6 cd6=) 19...Rd8=+ 20.Rd1 c6 21.e4 cd5 22.ed5 (better 22.Rd5!? Qb8 23.Nd2=+) 22...Bd4–/+ 23.Na3 (23.Re1 g6–/+ (23...Qd5?? 24.Qd5 Rf8 25.Nd2+–)) 23...Qd5 24.Qd5 Rd5 25.Kf1 Kf8 26.Nb5 Ke7 27.f4 Ke6?? (better 27...Rd7–+) 28.Nc7= Kd6 29.Nd5 Kd5 30.Ke2 f5 31.h3 h5 32.Kf3 c4 33.g4 (33.g3!?=) 33...hg4 34.hg4 g6 (34...fg4!? 35.Kg4 Ke4 36.Re1 Be3=+) 35.gf5= gf5 36.Rh1 (36.Rd2 c3 37.Ra2 Bc5=) 36...c3 37.Ke2 (37.Rc1 Kc4=) 37...Ke4 38.Rf1?? (better 38.Rh7=) 38...Be3–+ 39.Rf3 Bd2 (39...Bf4?! 40.Rc3 Bh6 41.Rf3=) 40.Rd3 Kf4 41.Rd4 Kg3 42.Rd8 f4?? (better 42...Kg4–+) 43.Rf8 Be3 (better 43...Kh4!?–/+) 44.Kd3= Bd2 45.Ke2 Kg2 0–1. Abdullaevich (1820) – savinovlev (1910), lichess.org, 2019.

4.a3 a6 5.c4 e5 6.Nc3 bc4 7.Bc4 Nf6 8.Qb3 Qe7 9.Nf3 (9.Nge2 a5=) 9...h6 (9...e4 10.Ng5 Ne5 11.0–0=) 10.Nh4 (10.d3 Rb8+=) 10...d6 (10...d5 11.Bd5 Nd5 12.Nd5 Qh4 13.Nc7 Ke7 14.Na8 Ba8 15.0–0+=) 11.Nf5 Qd7 12.Ng3 Nd8 13.Nd5 Nd5 14.Bd5 Be7 (14...Bd5 15.Qd5 c6 16.Qe4+=) 15.0–0 0–0 16.f4 ef4 17.Rf4 Bd5 18.Qd5 Ne6 19.Rg4 Ng5 (19...c6 20.Qf5 Rad8 21.Rf1+/–) 20.Nf5+/– c6 21.Ne7 (21.Qd3 h5 22.Rc4 a5+–) 21...Qe7 22.Qd4 (22.Qc6!? Rfc8 23.Qd5+/–) 22...f5+= 23.Rg3 Rf7 24.d3 (24.Rc1 Ne4 25.Rf3 Rc8+=) 24...d5 25.h4 Ne6= 26.Qc3 Qh4 27.Rh3+= Qg4 28.Rh6 Ng5 29.Rf1 Raf8 30.Kh2?? d4!–+ 31.Qc6 gh6 32.Bd4 Qh5 33.Kg3 Kh7 34.Qa6 Rg8 35.Kf2 Qh2 36.Qc4 Nh3 37.Ke1 Ng5?? 38.Kf2 Rc7 39.Qb3?? Nh3 40.Ke1 Qg2 41.Bc3 Re8 42.Rf5 Re3 43.Kd1 Rd3 (44.Ke1 Re7 45.Qe6 Qg1 46.Rf1 Re6 47.Be5 Re5; 43...Qg1 44.Kd2 Qe1 45.Kc2 Re2) 0–1. Meybohm,Dirk – Gestenberg, 1988.

4.a3 a6 5.Nf3 Nf6 6.c4 d6? 7.cb5+– ab5 8.Bb5 Nd7 9.Qc2 Na7 (9...Nce5 10.Ne5 de5 11.0–0+–) 10.Be2 e5 11.0–0 Be7 12.Nc3 0–0 13.Ne4 (13.b5 c6 14.a4 d5+–) 13...f5 (13...c5 14.h4!+–) 14.Qb3 (14.Ng3 g6+–) 14...Kh8 15.Ng3 Nf6 (15...Nc6+–) 16.Nf5 Ne4 17.Ne7 Qe7 18.d4 (18.Qc2!? Bd5+–) 18...ed4 19.Bd4 Nc6 20.Qb2 1–0. GuestVYKR – GuestTMQG, freechess.org, 2017.

4.a3 d6 5.Bb5 Nf6 6.Nf3 e6 7.Nd4+– Qd7 8.c4 a6 9.Ba4 e5 (9...Be7 10.Qf3 d5 11.cd5 ed5 12.Qd1+–) 10.Nb3+– 0–0–0 (10...Be7+–) 11.Na5 Ba8 (11...d5 12.Be5! Qe6 13.Bc6 Bc6 14.Nc6 Qc6 15.c5+–) 12.0–0 d5 (12...Rg8 13.d4 ed4 14.Qf3+–) 13.cd5 (better 13.Qe2!? Kb8 14.c5 Qe6 15.Bc6 Bc6 16.Qa6 Ba8 17.Qb5 Kc8+–) 13...Qd5 14.Nc6 Bc6 15.Bc6 Qc6 16.Be5 Nd5 (16...Bd6 17.Bf6 gf6 18.Qb3+–) 17.d4 f6 18.Bg3 Bd6 (18...f5 19.Qd3+–) 19.Bd6 Qd6 (19...Rd6 20.e4 Nb6 21.d5+–) 20.Qd3 (20.Nd2 Qe6+–) 20...Qb6 (20...h5 21.Nd2 h4 22.h3+–) 21.Nd2 Rhe8 (21...Qb5 22.Qc2+–) 22.Rfc1 Rd6 (22...h6+–) 23.Nc4 Qc6 24.Nd6 Qd6 25.Rc5 Nb6 (25...Kb8 26.Rac1 Rd8 27.Rc6+–) 26.Qa6 Kd7 (26...Kd8 27.Rac1 Nd7 28.Rc6+–) 27.Rac1 Ra8 (27...Na8 28.Rc6 Qd5+–) 28.Qb7 Ra3 29.Rc7 Ke6 (29...Ke8 30.Rg7 Ra7 31.Qa7 Qh2 32.Kh2 Nc4 33.Qe7) 30.Qe4 (30.Qe4 Qe5 31.R1c6) 1–0. GuestTBLL – cheskeljuan, freechess.org, 2020.

4.a3 e5 5.Bb5 Nce7 6.f3 (6.Nf3 f6+/–) 6...c6 7.Ba4 Nd5 (7...Ng6 8.d4+/–) 8.Be5 f6 (8...a5!?+/–) 9.Bb2 Qb6 (9...a5 10.ba5 Qa5 11.Bb3+–) 10.c4 Nde7 11.c5 Qc7 12.e4 f5 13.Bc2 Nf6 14.d3 (better is 14.ef5 a5 15.Nc3+–) 14...g6?? (14...fe4 15.de4 a5+–) 15.Bf6 Rg8 16.Nd2 Bg7 17.Bg7 Rg7 18.Bb3 0–0–0 19.Nc4 Ba6 (19...Kb8 20.Ne2+–) 20.Ne2 fe4 21.fe4 Bc4 22.Bc4 g5 23.0–0 d5 24.Ba6 Kd7 25.Nd4 Rg6 26.Qg4 Ke8 27.Rf2 Ng8 28.Raf1 Nf6 29.Rf6 Rf6 30.Rf6 Qe7 31.Re6 Rd7 32.Nc6 de4 33.Re7 Re7 34.Ne7 Ke7 35.Qe4 Kf6 36.Qh7 Ke6 37.c6 Kf6 38.c7 Ke5 39.c8Q g4 40.Qe4 Kf6 41.Qcf5 Kg7 42.Qeg4 Kh6 43.Qfh5 (43.Qgg5) 1–0. nordlicht (2120) – harzer, Gameknot.com, 2006.

4.a3 e5 5.Nf3 e4 6.Nd4 Nd4 7.Bd4 d5 (better 7...a6!?+=) 8.Bb5+– c6 9.Be2 Qg5 10.0–0 Bd6 11.g3 (11.f4 ef3 12.Rf3 a5+–) 11...Ne7 (11...a5 12.ba5 Ba6 13.c4+–) 12.f4 Qf5 (better 12...ef3!? 13.Bf3 Nf5+–) 13.Bg4+– Qg6 14.Bh5 (14.f5 Qg5 15.f6 h5+–) 14...Qf5 (14...Qh6!?+–) 15.Bg7+– Rg8 16.Bd4 (better 16.Be5 Nc8 17.Nc3+–) 16...c5? (better 16...Qh3+=) 17.bc5+– (worse 17.Bc5 Bc5 18.bc5 Rc8+–) 17...Bc7 18.Kh1 (18.Nc3 Ba6 19.Be2 Be2 20.Qe2 a6+–) 18...Ba6 (better 18...Qh3!? 19.Rf2 Nf5+–) 19.Rg1 Ba5 20.Nc3 Bc3 (20...Qc8 21.Ne2+–) 21.Bc3 Rb8 22.g4 Rb5 (22...Qc8+–) 23.gf5 Rc5 24.Rg8 Ng8 25.Qg4 (better 25.Bf7 Kd8 26.Bg8+–) 25...Kf8 26.Bb4 (26.Qg7 Ke7 27.Qf7 Kd8 28.Be5 Nf6 29.Qf6 Kc8 30.Qh8 Kb7 31.Qb8 Kc6 32.Be8) 26...Nf6 (26...Ne7 27.f6 Bc8 28.Qg7 Ke8 29.Qf7 Kd7 30.Qe7 Kc6 31.Be8 Bd7 32.Qd7 Kb6 33.Bc5 Kc5 34.Qc6) 27.Bc5+– Ke8 28.Qg5 Nh5 (28...Bb7 29.Qf6 Kd7 30.Qe7 Kc8 31.Bd6 d4 32.Qc7) 29.Qe7 1–0. GuestRDMJ – haraguest, freechess.org, 2017.

4.a3 e6 5.Bb5 a6 6.Be2 Nf6 7.Nf3 d5 8.d4 Ne4 (8...Bd6 9.0–0+/–) 9.Nbd2 Nd2 10.Qd2 Bd6 11.0–0 Qe7 (11...0–0 12.Rfc1+/–) 12.c4+– 0–0?? (12...dc4 13.e4 (13.Bc4?! Na5 14.ba5 Bf3+=) 13...Rd8 14.Qc3+–) 13.cd5 (better is 13.c5+–) 13...ed5 14.Rac1 Qe4 15.Bd3 Qe6 (15...Qg4 16.Ne5 Qh5 17.Qd1+–) 16.Qc2 (16.Bh7 Kh8 17.Bd3 Ne7+–) 16...Rab8? (better is 16...f5!?+–) 17.Bh7 Kh8 18.Bf5 Qh6 19.h3 Ne7 20.Bd3 Bc8 21.Ne5 Be5 22.de5 g6 23.f4 Bf5 24.Bf5 Nf5 25.Bd4 Nd4 26.ed4 f5 27.Qc7 Rbc8 28.Qd6 Rc1 29.Rc1 Qg7 30.Rc7 Qg8 31.Rc6 Rc8 32.Qg6 Qg6 33.Rg6 Rc1 34.Kh2 Ra1 35.Ra6 Rd1 36.Rf6 Rd4 37.Rf5 Rd3 38.e6 Ra3 39.e7 Ra8 40.Rf8 Rf8 41.ef8Q (41.ef8Q Kh7 42.Qf7 Kh8 43.f5 d4 44.f6 d3 45.Qg7) 1–0. Fournier,Frederic (1630) – juanex, Active, 2007.

4.a3 e6 5.Bb5 Nb4!? 6.Nf3 Bf3 7.gf3 Nd5=.

4.a3 e6 5.Bb5 Bd6?? 6.Nf3 (better is 6.Bg7 Qg5 7.Bh8 Qg2 8.Qf3+–) 6...Ne5?? (better is 6...Nf6+/–) 7.Ne5+– (7.Ne5 Be5 8.Be5+–; 7.Be5?! Bf3 8.Qf3 Be5+–) 1–0. Fournier,Frederic – Ola_ola__, Partie evaluee, 2m + 1s, 2008.

4.a3 e6 5.Nf3 a6 6.c4 bc4 7.Bc4+=.

4.a4 ba4 5.b5 Nb8 6.Ra4 Nf6 7.Nf3 e6 8.Be2 Be7 9.0–0 d5 (9...a6 10.c4+–) 10.c4 (10.Nc3 Nbd7+–) 10...Nbd7 11.cd5 ed5 12.Nd4 Nc5 13.Ra5 0–0 14.Qc2 c6? (better 14...Ne6+–) 15.Nf5+– Re8? (15...cb5 16.Ba3 Qa5 17.Ne7 Kh8 18.Qc5 Rfd8+–) 16.Ne7 Qe7 (16...Re7 17.Bf6 gf6 18.Qc5 cb5 19.Qb5+–) 17.Bf6 (17.bc6!? Nb3 18.Qb3 Bc6+–) 17...Qf6 18.bc6 Bc6 (18...Rec8 19.d4+– (19.cb7?! Nb7 20.Qa4 Na5 21.Qa5 Qd8+–)) 19.Rc5 Rac8 (19...Bb7 20.Nc3 Rac8+–) 20.Rc1 Bd7 (20...d4 21.Rc6 Rc6 22.Qc6 Qc6 23.Rc6+–) 21.Rc8 Rc8 (21...Bc8 22.Qc8 Rd8+–) 22.Qc8 (22.Qc8 Bc8 23.Rc8 Qd8 24.Rd8) 1–0. GuestVQLL – GuestSBPG, freechess.org, 2019.

4.a4 a6 5.Nf3 (5.ab5 ab5 6.Ra8 Qa8=) 5...Nb4 6.Be2 (6.ab5 Be4 7.Na3 ab5=) 6...Nf6 7.0–0 e6 8.c3 (8.Na3 c6=+) 8...Nc6 (8...Nbd5 9.Na3 b4 10.cb4 Nb4 11.Nc2=+) 9.ab5= ab5 10.Qb3 (10.Na3 b4 11.cb4 Nb4=+) 10...b4 (10...Na5 11.Qb5 Bc6 12.Qg5=+) 11.Ra8= Qa8 12.cb4 Bb4 (12...Nb4 13.Nc3 Be7 14.Nb5=) 13.Bf6 (13.Nc3!?=) 13...gf6=+ 14.Nc3 Qc8 (better 14...Ke7!?=+) 15.Rb1+= h5?? (better 15...Rg8+=) 16.Na2+– Ba6 (16...Ba5 17.Qb7 Qb7 18.Rb7 Ke7+–) 17.Ba6 (17.Nb4?! Nb4 18.Ba6 Na6+=) 17...Qa6 18.Nb4 Nb4 19.Qb4 Rh7 (19...Qb6 20.Qb6 cb6 21.Rb6 Ke7+–) 20.Qb8 Ke7 21.Qc7 (better 21.h3 e5 22.Qg8+–) 21...Qd3 (21...Rh8+–) 22.Rb8 e5 23.Qd8 Ke6 24.Rb6 Kf5 25.Qf6 (25.Qf6 Ke4 26.Qe5) 1–0. GuestYNWW – GuestYTRM, freechess.org, 2020.

4.Bb5 e6 5.Bc6+= Bc6 6.Nf3 Nf6 7.a3 a5 8.c3 Be7 9.0–0 0–0 10.Nd4 Bb7 11.b5 (11.d3 c5 12.bc5 Rb8+=) 11...Bc5 (11...c5 12.Nf3=) 12.a4 Bd4 (12...Bb6 13.d3+=) 13.cd4+– d5 (13...c6 14.d3+–) 14.Nc3 c6 15.Rc1 (15.Ba3 Re8+–) 15...Qd6 16.Qb3 cb5 17.Nb5 (worse 17.Qb5 Ng4 18.f4 Ba6=+) 17...Qd7?? (17...Qb4 18.Rc3 Ne4 19.Qb4 ab4=) 18.Ba3 (better 18.Rc7 Qd8 19.Rb7+–) 18...Rfc8+– 19.Qd3 (19.Rc8!? Bc8 20.Rc1+–) 19...Bc6 20.Rc2 Bb5 21.Rc8 Rc8 22.Qb5 Qb5 (22...Qc7 23.f3 Qd8 24.Bc5+=) 23.ab5+– h6 24.Bc5 Nd7 25.Rc1 (25.b6 Rb8 26.Rb1 Rb7+–) 25...a4+= 26.Kf1 Nc5?? (better 26...e5+=) 27.dc5 (27.Rc5?? Rc5 28.dc5 a3–+) 27...Kf8 28.d4 (better 28.b6!? Ke7 29.b7 Kd8 30.bc8R Kc8+–) 28...Ke8?? (better 28...Ke7+–) 29.Ra1 (29.c6 Kd8 30.b6 g6+–) 29...Ra8 30.b6 (30.c6 Ra5 31.b6 Rb5 32.Ra4 Rb6 33.Ra8 Ke7+–) 30...f5?? (30...Kd7+–) 31.Ke2 (better 31.c6 Kd8 32.Rc1+–) 31...Kf7 (31...Kd7 32.Kd2 Kc6+–) 32.Kd2 (32.c6 f4+–) 32...Ra5 (32...Rb8 33.c6 Rb6 34.c7+–) 33.Kc1 (33.c6 Rb5 34.c7 Rb6+–) 33...g6 (33...Ke8 34.b7 Rb5 35.Rb1 Rb7 36.Rb7+–) 34.f3 (34.c6 Rb5 35.c7 Rb6+–) 34...Ra8 (34...Ke8 35.b7 Rb5 36.Rb1 Rb7 37.Rb7+–) 35.Kd2 (better 35.b7 Rb8 36.c6 h5+–) 35...Ra6 (35...Rb8 36.c6 Rb6+–) 36.Rc1 (better 36.b7 e5 37.b8Q Re6+–) 36...f4 (36...Ra8 37.c6 a3 38.c7+–) 37.Rb1 (37.b7 e5 38.ef4 Re6+–) 37...Ke7 (37...fe3 38.Ke2 Ra8+–) 38.Rh1 (38.b7 Ra7 39.b8Q fe3 40.Ke3 Kf7 41.Qa7 Kf6 42.Qd7 h5 43.Qd8 Kg7 44.Qe7 Kh6 45.Qf8 Kg5 46.Qf4) 38...Ra8? (38...fe3 39.Ke3 Kd7 40.Rc1+–) 39.e4 (better 39.c6!? fe3 40.Ke3 Re8+–) 39...Ra5? (39...de4 40.fe4 Kd7+–) 40.h3 (better 40.ed5 ed5 41.c6 Rb5 42.Re1 Kd6+–). RichardSommer (2010) – Nikita2309 (1870), lichess.org, 2020.

3.e3 d5

4.Bb5+/– Bc6 5.Bc6 Nc6 6.c3 e5 7.d4 Nf6 (7...Rb8 8.de5 Ne5 9.Nf3 Nf3 10.Qf3+=) 8.Ne2 (8.b5!? Rb8 9.Qe2+/–) 8...e4+= 9.0–0 Rb8 10.Nd2 Bd6 11.h3 0–0 12.f3 ef3 13.Nf3 (13.Rf3 Re8=) 13...Re8 14.Qd2 Qe7 15.a4 Qe3 16.Qe3 Re3 17.Nc1 (17.Rfe1 Rbe8 18.Kf2 R3e7=+) 17...Ne4–/+ 18.Nb3? (18.Na2 Re2 19.Rab1 Bf4–/+) 18...Nc3 (better is 18...Nb4!? 19.Nbd2 Nc3 20.Bc3 Rc3 21.Rfc1–+) 19.Bc3 Rc3 20.Rab1? (better is 20.b5 Rb3 21.bc6–+) 20...Rb4 21.Nfd2 Bf4 22.Rbd1?? Be3 23.Kh1 Bd2 24.Nd2 Nd4 25.Nf3 (25...Nf3 26.Rf3 Rf3 27.gf3–+). C_Artist_Think – oasis, chessHere.com, 2006.

4.Bb5+/– Bc6 5.Be2+/–.

4.Bb5+/– Nd7 5.Nf3 f6 6.Nd4 e6? (better 6...e5 7.Ne6 Qc8+–) 7.Ne6 Qc8 8.Qh5 g6 9.Qh3 (9.Qh4 c6 10.Nf8 cb5 11.Nd7 Qd7 12.Bf6 Nf6 13.Qf6 Rf8 14.Qe5 Qe7 15.Qe7 Ke7+–) 9...c6 10.Be2 (10.Nf8 Nf8 11.Qc8 Rc8+– (11...Bc8?? 12.Bc6 Nd7 13.Ba8+–)) 10...Ne5 (better 10...Bb4 11.0–0 Rb8+–) 11.f4 Nc4 12.Bc4 dc4 13.f5 g5 (13...c5 14.bc5 Rb8 15.fg6 hg6 16.Qh8 Qe6+–) 14.Qh5 Ke7 15.Bd4 Kd7 16.Qf7 Be7 17.Nc5 (17.Qg7!? a5 18.Qh8 ab4 19.Qh7 Rb8+–) 17...Kc7 18.0–0 (18.Qg7 Qf5 19.Qh8 Qg6+–) 18...Qe8 (18...h5 19.Bf6! Nf6 20.Qe7 Nd7 21.Ne6 Kb6 22.a4+–) 19.Ne6 (19.Qg7 Nh6 20.Qh6 Qf7+–) 19...Kd7 20.Qg7 Nh6 21.Qh6 Qf7 22.Nc3 Ba6 (22...c5 23.bc5 Rhg8 24.e4+–) 23.Ne4 Kc8 24.Bf6 Bf6 (24...Re8 25.Be7 Qe7+–) 25.Nd6 (25.Nd6 Kd7 26.Nf7+–) 1–0. DEFFM – GuestBMWG, freechess.org, 2018.

4.Nf3 a5 5.a4+=.

4.Nf3 a6 5.a4 Qd6+=.

4.Nf3 a6 5.Be2 e6 6.0–0 Bb4?? 7.Bg7 Nf6 8.Bh8+–.

4.Nf3 a6 5.Be2 e6 6.0–0 Nf6 7.a4 Bb4 8.ab5 0–0 9.c3 (9.Ne5 ab5 10.Ra8 Ba8 11.Bb5 c5=) 9...Be7 (9...Bd6 10.Nd4=) 10.Qb3 (10.Ne5 ab5 11.Ra8 Ba8 12.Bb5 c6=) 10...Nbd7 11.d4 Rb8 (11...ab5 12.Ra8 Qa8 13.Ba3=+) 12.Ba3 Bc6? (12...ab5 13.Be7 Qe7 14.Bb5 Bc6=+) 13.Be7+/– Qe7 14.Ra6 Bb7 15.Ra7 Qd6 (15...c5 16.bc6 Bc6 17.Qa3 Qa3 18.Na3+/–) 16.Nbd2 Qb6 (16...c5 17.Rfa1+/–) 17.Rfa1+– c6 (17...Ra8 18.Qa4+–) 18.Qa4 Ra8+/– 19.bc6 Bc6 20.Qa5 Ra7 21.Qa7 Qb2 22.Qa3 Qb7 23.h3 g6 24.Nb3 Ne4 25.Na5 Qc7 26.c4 dc4 27.Nc4 Bb5 28.Qa5 Qc6?? 29.Nce5+– Ne5 30.Ne5 Qc2 31.Qb5 Nc3 32.Bd3 Nb5 33.Bc2 f6 34.Nd7 Rf7 35.Bb3 Rd7 36.Be6 Rf7 37.Ra5 Nd6 38.Ra7 Kf8 39.Bf7 Nf7 40.Rf7 (40...Kf7 41.e4+–; 40.d5!? f5+–) 1–0. Karaivanov,N – Dojchinov,At, Borovetz, 2003.

4.Nh3 Na6 (4...Qd7!?+=) 5.Bb5+– c6 6.Ba6 Ba6 7.Qg4 Nf6 8.Bf6 Bc8 9.Qf3 ef6 10.Nf4 (10.a3 a5 11.ba5 Qa5+=) 10...Bb4= 11.0–0 f5 12.c3 Bd6 13.Nd3?? (13.d4!?=) 13...0–0 (13...Ba6 14.Qf5 Qd7 15.Qd7 Kd7 16.Nc1 Bf1 17.Kf1–+) 14.a4? (14.Nb4 Qc7 15.h3 a5=+) 14...Qh4 (14...Ba6 15.Qe2–+ (15.Qf5?? g6 16.Qh3 Bd3–+)) 15.g3 (15.Nf4!?–/+) 15...Qe4 16.Qe2?? (better 16.Qe4 fe4 17.Nb4–/+) 16...d4 (better 16...Ba6 17.Rc1 Bd3–+) 17.f3= (17.cd4? Ba6 18.f3 Qd3 19.Qd3 Bd3–+) 17...Qe7 18.Nf4 (18.cd4 Ba6=) 18...Re8 (better 18...de3 19.de3 Re8–/+) 19.cd4+= a5 20.Qf2 Ba6 21.Re1 Rab8 22.Nc3 Rb2 23.Ra2 Rb4 24.e4 (24.Rc1!?=) 24...Bf4 25.gf4 Qd6 26.ef5 Bc4?? (better 26...Re1 27.Qe1 Qd4 28.Kg2 Qd8=+) 27.Re8+– (27.Re8 Qf8 28.Qe3+–) 1–0. beatmeeasy (1945) – Persian_Soldier (2045), lichess.org, 2021.

4.Bb5+/– c6

5.Bd3 Qc7 6.Nf3 (6.f4 Qb6+–) 6...f6 (6...Nd7 7.0–0+–) 7.Nd4+– h5?? (better 7...e5 8.Ne6 Qe7 9.Nf8 Qf8 10.Qh5 Qf7+–) 8.Ne6 Qd7 (8...Qd6 9.Bg6 Kd7 10.Nf8 Kd8 11.Bh5 e5+–) 9.Bg6 1–0. DEFFM – GuestYNPB, freechess.org, 2018.

5.Bd3 Qd6 6.a3 e5 7.Nh3 (7.Nc3 Nf6+–) 7...Nf6 (7...a5 8.b5+–) 8.f4 e4 9.Be2 Nbd7 10.0–0 (10.Nc3 Be7+–) 10...Be7 11.c4 (11.d3 0–0+–) 11...0–0 (11...c5 12.bc5 Nc5 13.Be5+=) 12.cd5 (12.c5 Qc7+–) 12...cd5 (12...c5 13.Nc3+=) 13.Bd4 a6 (13...a5 14.b5+=) 14.Nc3 Qb8 (14...Rfc8 15.d3+–) 15.Qb3 (15.d3 a5 16.b5 Rc8+–) 15...Qd8 (15...a5 16.b5+–) 16.f5 (16.Rac1 a5+–) 16...Bd6 17.Nf4 Qb8 (17...Be5 18.Ncd5 Bd4 19.ed4 Nd5 20.Nd5+–) 18.Rac1 (18.h3 Be5 19.Ncd5 Nd5 20.Nd5 Bd4 21.ed4 Qd6+–) 18...Bf4 (18...Be5 19.Na4+–) 19.Rf4 Ne5 (19...Rc8 20.d3+–) 20.b5 (20.Na4 Ned7+–) 20...ab5+– 21.Nb5 (21.Qb5 Re8+–) 21...Ba6 22.a4 Rc8 (22...Re8 23.Qb2+–) 23.Rc8 Qc8?? (better 23...Bc8 24.Qc2 Ba6+–) 24.Be5+– (24.Be5 Nd7 25.Bd4 Qc1 26.Kf2+–) 1–0. DEFFM – GuestYKGX, freechess.org, 2018.

5.Bd3 e6 6.Nf3+–.

5.Be2 a6. GuestJHHG – GuestFJLS, freechess.org, 2017.

5.Be2 Qb6 6.a3 c5 7.c3 (7.Bc3 cb4 8.ab4 a6+/–) 7...c4 8.Nf3 Nf6 9.0–0 Nbd7 10.d3 e6 (better is 10...cd3!? 11.Qd3 Rc8+/–) 11.dc4+– dc4 12.Bc4 Be7 13.Be2 0–0 14.c4 Rad8 15.Qb3 Ne4 16.Nc3 Ndf6 17.Rfd1 Nc3 18.Bc3 a5 19.Bd4 Qc7 20.Rac1 (20.ba5 Ra8+–) 20...ab4 21.ab4 Bd6 22.h3 e5 23.Bb2 e4 24.Nd4 Ba8 25.c5 Be5 26.Nb5 Qc6 27.Be5 1–0. Fournier,Frederic (1660) – pasmat, Active, 2006.

5.Be2 Qd6+/–.

5.Be2 Nd7 6.Nf3 f6 7.0–0 e5 8.a4 (better 8.a3!?+–) 8...Bb4+= 9.c3 (9.Ba3 Ba3 10.Na3 Ne7=) 9...Bd6= 10.c4 Ne7 11.h3 (11.cd5 e4 12.Nd4 cd5+=) 11...0–0 12.Nc3 dc4 (12...Nb6 13.cd5 cd5 14.a5=) 13.Bc4 Nd5? (better 13...Kh8=) 14.e4+– N7b6 15.Ba2 Kh8 16.ed5 cd5 17.d3 (17.Re1 Rb8+–) 17...f5 (17...Rb8+–) 18.Nb5 (18.a5 d4 19.ab6 dc3 20.Bc3 Rc8+–) 18...Bb8 (18...d4 19.a5 Nc8 20.Nd6 Qd6 21.Re1 Bf3 22.Qf3+– (22.gf3?! Rb8 23.Rb1 f4+–)) 19.Ne5 (19.Be5 Be5 20.Ne5 a6+–) 19...a6 20.Na3 d4 (20...Qe8 21.Re1 Qa4 22.Qh5 Be5 23.Re5+–) 21.Nf3 (21.f4 Be5 22.fe5 Bc6+–) 21...Bd6 (21...Qd6 22.Re1 Bf3 23.Qf3 (23.gf3?? Qh2 24.Kf1 Qh3 25.Ke2 Bf4–+) 23...Qh2 24.Kf1+–) 22.Nc4 Nc4 23.Bc4 Bc5 24.Ne5 f4 (24...Qg5 25.g3 Qf6 26.f4+–) 25.Nf7 (25.Qh5 Qf6 26.Bf7 h6 27.Ng6 Kh7 28.Nf8 Bf8+–) 25...Rf7 26.Bf7 f3 27.g3 (better 27.Qb3 Rb8 28.Rfc1 Bc6+–) 27...Qd7 28.Kh2?? (better 28.Bh5 Qd5 29.Bg4+–) 28...Qf7+– 29.Qc2 Qd5 (29...Rc8 30.Rfc1 Qf5 31.Qc4+–) 30.Qc4 (30.Rfc1 Bb6 31.a5 Ba5 32.Bd4 Qd4 33.Ra5+–) 30...h6 (better 30...Qc4!? 31.dc4 d3+=) 31.Qd5 Bd5 32.Ba3 (32.Rac1!? Ba7 33.Rc7 Be6+–) 32...Ba7 (32...Ba3 33.Ra3 Rb8 34.a5+–) 33.Bd6 (33.Rac1 Kh7+–) 33...Rd8+– 34.Be5 Re8 35.Rfe1 Kh7 36.a5 Bb3 (better 36...Bf7!?+–) 37.Rab1 Bc2?? (37...Bd5 38.Rbc1 Bb3+–) 38.Rb7 Bc5 (38...Rg8 39.Ra7 Bd3 40.Bd4+–) 39.Rg7 Kh8 40.Rc7 (better 40.Re7 Kg8 41.Re8 Kf7+–) 40...Re5 (40...Kg8 41.Re4 Re7 42.Rg4 Kf7 43.Rf4 Kg6 44.Rc5 Bd3 45.Rf3 Be4 46.Rf6 Kh7 47.Bd4 Rd7+–) 41.Re5 Bb4 42.Re8 (42.Re8 Bf8 43.Rf8) 1–0. KLINGON09 (1800) – Kanimambo (1805), lichess.org, 2019.

5.Be2 e6 6.Nf3 Bb4?? 7.Bg7+– f6 (7...Ba6 8.Ba6 Na6 9.Bh8+–) 8.Bh8 Nh6 9.Nd4 Kd7 (9...e5 10.Bh5 Ke7 11.Bg7 ed4 12.Bh6 de3 13.Qg4 Bd2 14.Nd2 ed2 15.Kd2+–) 10.Bg4 (better 10.Bg7 Nf7 11.0–0+–) 10...Qh8 (10...f5 11.Bf5! Nf5 12.Be5+–) 11.Be6 (11.Be6 Kd8 12.Qh5+–; 11.Ne6?! f5 12.c3 fg4+=) 1–0. GuestMKNW – GuestAETS, freechess.org, 2017.

5.Bf1 Nd7 6.c4 (6.Nf3 Ngf6+/–) 6...e5+= 7.cd5 cd5 8.Nf3 (8.Bb5 f6 9.Qh5 g6 10.Qg4+=) 8...Ngf6 (8...Bd6 9.Bb5 f6 10.a3+=) 9.a3 (9.Ne5 Bb4 10.Qb3 Bc5+–) 9...Be7 (9...Bd6 10.Nc3+=) 10.Be2 (10.Ne5 0–0+–) 10...0–0 (10...e4 11.Nd4+=) 11.0–0 (11.Ne5 a5+–) 11...a6? (11...e4 12.Nd4+/–) 12.d4 (better is 12.Ne5 Re8 13.Nd7 Qd7 14.Bd4+–) 12...Bd6?? (better is 12...e4!? 13.Ne5 a5+/–) 13.Ne5 Bc7 14.Nd2 Re8 15.Nd7 Qd7 16.h3 Qd6 17.g3 Ne4 18.Ne4 Re4 19.Qd3 Rae8 20.Bc1 Qh6 21.Kg2 Bc8 22.Bg4 Rg4+= 23.hg4 Qg5?? 24.f3 f5 25.e4 f4?? 26.Bf4 Bf4 27.gf4 Qf4 28.e5 Re7 29.Rac1 Bd7 30.Rc2 h5 31.Qd2 hg4 (31...Qd2 32.Rd2 hg4 33.fg4 Bg4+–) 1–0. Melzig,Ernst – Franz,Ulrich, GER–ch Seniors, 2001.

5.Bf1 Nf6 6.Nf3+/–.

3.e3 d6

4.Bb5+– c6 5.Ba4 Nd7 6.Nf3 Nb6 7.c4! Nc4 (7...e5 8.d3+–) 8.Qc2 Nb2?? (better 8...Nb6 9.Bc6 Bc6 10.Qc6 Qd7 11.Qd7 Kd7+–) 9.Qb2 (better 9.Bc6 Bc6 10.Qc6 Qd7 11.Qa8 Qd8 12.Qa7+–) 9...h6 (9...e6 10.0–0=) 10.0–0 a5 (10...e6 11.Rc1 Rc8 12.a3+=) 11.Nc3 (11.b5 Qd7+–) 11...Nf6 12.a3 e5 13.b5 Qc7 (13...c5!?+=) 14.bc6 Bc6 15.Nb5 Bb5 16.Bb5 Nd7 17.a4 (17.Rfc1 Qa7+–) 17...Be7 18.Rac1 Qb7 19.Qa2 0–0 (better 19...Rc8!?+–) 20.Bc6+– Qa7 21.Ba8 Ra8 22.Rc2 Nc5 23.d4 e4 (23...Nd3 24.Rc3+–) 24.dc5 ef3 25.cd6 Bd6 26.Rfc1 (26.Qd5 fg2 27.Rfc1+– (27.Qd6?! gf1R 28.Kf1 Qb7=; 27.Qg2?! Rd8+–; 27.Kg2?! Rd8+–)) 26...Bb4?? (better 26...Qd7 27.Qc4 fg2+–) 27.Rc8 (better 27.Rc7 Qc7 28.Rc7 Rf8+–) 27...Rc8 28.Rc8 Kh7 (28...Bf8 29.Qa3 (29.gf3?! Qb7 30.Rd8 Qf3+–) 29...Kh7 30.Rf8+–) 29.Qc2 g6 30.Qb2 (30.Qb2 f6 31.Qf6+–) 1–0. GuestFDLY – ahazia, freechess.org, 2017.

4.Bb5+– c6 5.Be2 Qb6 (5...c5 6.Bf3 Bf3 7.Qf3+– (7.gf3?! cb4 8.c4 Nd7=)) 6.a3 (6.Bc3 Nf6+–) 6...c5 (6...a5 7.c3+–) 7.Nf3 cb4 (7...e5 8.Bc3+–) 8.0–0 (8.Bd4 Qc7 9.ab4 e5+–) 8...Nd7 (8...e5 9.ab4 Qb4 10.Nc3+–) 9.Bd4 Nc5 10.ab4 Qb4 11.Na3 (11.Nc3 Qb6+–) 11...e5 12.Bb5 (12.Nb5 ed4 13.Nc7 Kd7 14.Na8 d3 15.Bd3 Ba8 16.Ra7 Bb7+–) 12...Nd7 (12...Kd8 13.Bc3 Qg4 14.Be2+–) 13.Bd7 (13.Qe2 Qa5 14.Bd7 Kd7+–) 13...Kd7+– 14.Rb1 Qa3 15.Rb7 Kc8 (15...Ke8 16.Ng5 Qa6+–) 16.Bb2?? (16.Ng5 Nh6 (16...ed4?? 17.Qf3 d5 18.Rfb1+–) 17.Qf3 e4 18.Qe4 d5 19.Qe8 Kb7 20.Rb1 Bb4 21.Qb5 Kc8 22.Qc6 Kd8 23.Qa8 Kd7 24.Qh8 Bd6+–) 16...Qa2 (better 16...Qa5 17.Rb3 Kd8+–) 17.Rb3+– Be7?? (17...Rb8 18.Ne5! Rb3 19.Qg4 Kb7 20.Qd7 Ka6 21.cb3 de5+–) 18.Ne5! Rb8 (18...de5 19.Qg4 Double attack (19.Rc3 Decoy)) 19.Qg4 Kc7 (19...f5 20.Qf5 Kd8 21.Qd7) 20.Qd7 1–0. Kreuzer,Uwe – Konzelmann, Bez–Kl Mannheim, 1980.

4.Bb5+– c6 5.Be2 e5 6.Nf3 Nf6 7.a4 a5 (7...Be7 8.0–0+–) 8.b5+– c5 (8...Nbd7 9.0–0+–) 9.d3 Be7 10.Nbd2 g5? (better 10...0–0+–) 11.e4 g4 (11...h6 12.Nc4+–) 12.Nh4 h5 13.Nf5 (13.0–0 Ne4 14.de4 Bh4+–) 13...Rg8 (13...Bc8 14.h3 Bf5 15.ef5+–) 14.0–0 Bc8 (14...Nbd7 15.f4 gf3 16.Bf3+–) 15.f4 gf3 16.Bf3 h4 17.Nh4 Ng4 18.Nf5 Bf5 19.ef5 Ne3 20.Qe2 (20.Ba8?! Nd1 21.Rad1 Nd7+–) 20...Nf1 21.Ba8 (21.Nf1?! Ra7+–) 21...Nd2 22.Qd2 Bg5 23.Qe2 Bh6 (23...Ke7 24.g3+–) 24.Bd5 Nd7 (24...Qg5 25.b6+–) 25.Bf7! Kf7 26.Qh5 Kg7 (26...Ke7 27.Qh6 Nf6+–) 27.Qg6 Kf8 28.Qh6 Ke8 (28...Rg7 29.Qd6 Qe7+–) 29.Qe6 Qe7 (29...Kf8 30.Bc1 Rg7 31.Bh6+–) 30.Qg8 (30.Qg8 Qf8 31.Qf8 Kf8 32.Bc3+–) 1–0. GuestPCMQ – GuestRMBL, freechess.org, 2020.

4.Bb5+– c6 5.Bf1 e5 6.Ne2 Nf6 7.Ng3 Be7 8.c4 (8.d4 Nbd7+–) 8...Qd7 (8...0–0 9.Nf5+=) 9.Nc3 0–0 10.Be2 c5 Black gets strong initiative 11.Bf3 (better 11.bc5!? dc5 12.0–0+=) 11...cb4= 12.Bb7 Qb7 13.Nce2 (13.Nd5 Nd5 14.Qf3 f5 15.Qd5 Qd5 16.cd5 Nd7=+) 13...Qg2 14.a3? (14.Rg1 Qh3=+) 14...Nc6 (14...Ng4 15.Qc2 Qf2 16.Kd1 ba3 17.Ba3–+) 15.ab4 (15.Rg1!? Qf3 16.Nc3 Qd1 17.Nd1–/+) 15...Nb4 Threatening mate... how?. 16.Qb3 (16.Nc1 d5 17.Rf1 dc4 18.Be5 Ne4–+) 16...Rfb8 (better 16...Ne4 17.Rg1 Qf2 18.Kd1 Ng3 19.hg3 Rfb8–+) 17.Qc3?? (17.Rg1 Qf3 18.Ra4–+) 17...Nd3 (better 17...Ne4 18.Ne4 Qh1 (18...Qe4?! 19.Ng3 Qf3 20.0–0–+) 19.Ng1 Qg1 20.Ke2 Qg4 21.f3 Qg2 22.Nf2 Bf6–+) 18.Qd3–/+ Rb2 19.Nc3 Ng4 (19...a5 20.Rf1–/+) 20.Qf5 Nh2 (better 20...Nh6 21.Qh5 Bf8–/+) 21.Qh5?? (better 21.0–0–0 g6 22.Qd7=) 21...Nf3–+ 22.Ke2 (22.Kd1 Rd2 23.Kc1–+) 22…Rd2 0–1. aravind555 – NTOP (1625), lichess.org, 2019.

4.Bb5 Bc6 5.a4 Bb5 (5...a6 6.Bc6 Nc6 7.b5+–) 6.ab5+– a6 (6...e6 7.Nf3+–) 7.Nf3 (7.c4 c6 8.bc6 Nc6 9.Qa4+–) 7...Nd7 (7...e5+–) 8.ba6 Qb8 9.0–0 (9.c3 e5+–) 9...e5 (9...Qb4 10.Ng5 Ngf6 11.Qf3+–) 10.c3 f5 (10...Ngf6 11.d3+–) 11.Qb3 (11.Qe2 c6+–) 11...Ngf6 (11...Be7 12.d4 e4 13.Nfd2+–) 12.Qe6 Be7 13.Ng5 h6 (13...Nf8 14.Qf7 Kd8+–) 14.Qf7 Kd8 15.Ne6 Kc8 16.Qe7 Re8 (16...g5 17.Ng7+–) 17.Qf7 c5 (17...g5 18.Ng7 Rf8 19.Qg6+–) 18.Ng7 Kc7 (18...Rf8 19.Qe6+–) 19.a7 Ra7 (19...Qb7 20.Ne8 Ne8 21.Qe7+–) 20.Ne8 Ne8 21.Ra7 Qa7 22.Qe8 Qa2 23.Ba3 (23.Na3 cb4 24.Nb5 Kc6+–) 23...Qc2 24.bc5 Qd3 25.cd6 Qd6 1–0. DEFFM – GuestDNYT, freechess.org, 2018.

4.Ne2 Nd7 (4...a5 5.ba5 Ra5 6.Nd4+=) 5.Nf4 (5.Ng3 a6=) 5...Ngf6 (5...e5 6.Nh5=) 6.Bb5 (6.Bf6 Nf6 7.Bb5 c6+=) 6...a6 (6...e5 7.Nh5 Nh5 8.Qh5 Bg2 9.Rg1=) 7.Be2 (7.Bd7 Nd7 8.Qh5 e5+–) 7...c5 (7...e5 8.Nd3 Bg2 9.Rg1=) 8.b5 (8.bc5 e5 9.Nd3 e4+–) 8...Nb6? (8...e5!? 9.ba6 Bc6=) 9.0–0 (9.ba6 Bc6 10.Bf6 gf6+–) 9...Qd7 (9...e5 10.Nh3+–) 10.c4 (10.Bf6!? gf6 11.ba6 Ba6 12.Nc3+–) 10...ab5 11.cb5 h6 (better 11...e5!? 12.Nh3 Na4+=) 12.a4+– g5? (12...e5 13.Nh3+–) 13.Nd3 (13.Nh5 Qf5+–) 13...Nc4? (13...Bg7 14.Ne1+–) 14.Bc3 (14.Nc5 Nb2 15.Nd7 Nd1 16.Nf6 ef6 17.Rd1 Bg7+–) 14...Bg7? (14...Na5 15.Bg4! Qc7 16.Bf6 ef6 17.Nc3+–) 15.Ne1 (better 15.Nc5 dc5 16.Bc4+–) 15...0–0?? (better 15...Na5+–) 16.Bc4+– d5 17.Be2 d4 18.Bb2 Qd5 (18...Nd5 19.Qc1+–) 19.Bf3 (better 19.a5 Qd6+–) 19...Ne4 (19...Qd7 20.ed4 Nd5 21.Nd3 Bd4 22.Bd4 cd4 23.Nc5+–) 20.Qc2 (20.d3!? f5 21.ed4 cd4+–) 20...f5 (20...g4 21.Bg4 d3 22.Qc1+–) 21.Be2 (better 21.d3 c4 22.de4 fe4 23.Bg4+–) 21...e5 (21...Nd6+–) 22.Bc4 Nd2 23.Bd5 (better 23.Nd2!? Rac8+–) 23...Bd5 24.Qd2 e4 25.ed4 cd4 26.Bd4 (26.Bd4 Rad8 27.Bg7 Kg7 28.Qd4 Kg8 29.Qb6+–) 1–0. Akrapovik (1660) – MialoYurii1982, lichess.org, 2019.

4.Nf3 c6 5.c4 a6 6.d4 Nd7 7.cb5 ab5 8.a4 Qc7 (8...ba4 9.Ra4 Ra4 10.Qa4+=) 9.a5 (9.ab5 Ra1 10.Ba1 e6+–) 9...Ndf6 (9...Ngf6 10.Bd3+=) 10.Be2 (10.Qd2 d5+–) 10...Nd5 (10...e5 11.de5 de5 12.Qb3+=) 11.0–0 (11.Qd2 Ngf6 12.Bd3 e5+=) 11...e6 (11...Nb4 12.Bc3 Na6 13.Qc2=) 12.e4 (better 12.Qd2+–) 12...Nb4= 13.Qb3 (13.Qd2 d5 14.ed5 Nd5 15.Nc3–/+) 13...c5?? (better 13...d5=+) 14.dc5+– dc5 15.Bb5 Bc6 16.Bc6 Qc6 (better 16...Nc6 17.a6 Nb4+–) 17.a6 (better 17.Ne5 Qb7 18.Qa4 Ke7 19.Rc1+–) 17...Be7?? (better 17...Qe4 18.Rc1 Qd5= (18...Ra6 19.Ra6 Na6 20.Qb5 Ke7 21.Rd1+–)) 18.Bg7 (better 18.Ne5 Qa6 19.Ra6 Ra6+–) 18...Bf6 19.Bh8 Bh8 20.Ra5 (20.e5 Ne7+–) 20...Ra6 (20...Nf6 21.Rc1 Na6 22.Ne5+–) 21.Ra6 Qa6 22.Nc3 (22.Rc1 Qd3 23.Qa4 Kf8+–) 22...Qd3 (22...Nf6 23.Rd1+–) 23.Qa4 Ke7?? (23...Kf8 24.Qa8 Kg7+–) 24.Qa7 (better 24.Rd1 Bc3 25.Rd3 Nd3+–) 24...Kf6 (24...Qd7 25.Qc5 Qd6 26.Qg5 Bf6+–) 25.Qc5 Nc2 (25...Nd5 26.ed5 Kg7 27.de6 Qd8 28.ef7 Kf7+–) 26.Qg5 1–0. sirgeshdb (1905) – lmfigo (1835), lichess.org, 2020.

4.Nf3 Qd7!?+=.

4.Nf3 e5 5.Bb5 c6 6.Bd3 Nf6 7.Nc3 Be7 8.Ne4 Ne4 9.Be4 d5 10.Bf5 0–0 (better is 10...e4!? 11.Ng1 Bb4+=) 11.Ne5+– Bb4? (better is 11...g6 12.Qg4 Bf6+–) 12.Qh5 h6 13.Qg4 Qg5 (13...d4+–) 14.Qb4 Ba6 (14...Qf5 15.Qb7 f6 16.Ba3+–) 15.Bh7! Kh7 16.Qf8 f6 17.Nc6! Qg2 (17...Nc6 18.Qa8 Pinning (18.Qa8 Deflection)) 18.0–0–0 (18.0–0–0 d4 19.Rdg1 Nc6 20.Qa8+–) 1–0. Fournier,Frederic (1990) – Quasarlux (1730), Active, 2007.

4.Nf3 e5 5.c4 Bf3? 6.Qf3+– (6.gf3?! bc4 7.Bc4 d5 8.Qa4 c6=) 6...f6?? (better 6...Nd7 7.cb5 Ngf6+–) 7.Qa8+– Nc6 (7...bc4 8.Bc4 a6+–) 8.Qc6 Qd7 9.cb5 1–0. GuestNDHS – GuestCFJV, freechess.org, 2017.

4.Nf3 Nf6 5.Bb5 c6 6.Be2 Nbd7 7.d4 Qb6 8.a3 c5 9.dc5 dc5 10.c3 cb4 11.cb4 Nd5 12.Nc3 Nc3 13.Bc3 e6 14.0–0 Qd6 15.Qd6 Bd6 16.Bg7 Rg8 17.Bd4 Bf3? (better is 17...e5 18.Bc3 Rd8+–) 18.Bf3 e5 (18...Rd8 19.Ba7 Ke7 20.Rfc1+–) 19.Bb2 (better is 19.Ba8 ed4 20.ed4+–) 19...Rb8 20.Rfd1 Ke7 21.Be2 a5 22.b5 Nc5 23.a4 Nb3 (23...Rgd8 24.Rd5 f6 25.Bc3+–) 24.Rab1 Rg6 (24...Nc5 25.Ba3 Nb7 26.Bd6 Nd6 27.b6+–) 25.Be5! Be5 26.Rb3 Rh6 27.g3 Rg6 28.Rbd3 Rd6 29.f4 Rd3 30.Rd3 Bf6 31.e4 Rd8 32.Rd8 Kd8 33.e5 Be7 34.Kf2 Bc5 35.Kf3 Ke7 36.Ke4 Ke6 37.Bc4 Ke7 38.Kd5 Bg1 39.h3 Bh2 40.f5 Bg3 41.e6 fe6 42.fe6 Bb8 43.Kc6 Bh2 44.b6 h5 45.Kb5 Kd6 46.Ka5 Be5 47.Ka6 Kc5 48.e7 (48.e7 Kd4 49.e8Q+–) 1–0. Fournier,Frederic – NN, jeu.europe–echecs.com, 2013.

3.e3 e5?

4.a4 ba4 5.Ra4 Nc6 6.b5 Nce7 7.Be5 Nf6 (7...Ng6!? 8.Bc3 Nf6+/–) 8.Bf6+– gf6 9.Nf3 a6 (9...Nd5!? 10.Nc3+–) 10.ba6 Ra6?? (better is 10...Bc6 11.Ra5 Rg8+–) 11.Ba6 Bf3 (11...Bc6 12.Ra1+–) 12.Qf3 Nc6 13.Re4 Be7 14.Qf6 Ne5 (14...Rf8+–) 15.Qh8 Bf8 16.Re5 Qe7 17.Re7 Ke7 18.Qe5 Kd8 19.Qf6 Ke8 20.Bc4 Be7 (20...Bg7 21.Qf7 Kd8 22.Qg8 Ke7 23.Qg7 Kd6 24.Qf6 Kc5 25.d4 Kc4 26.Qa6 Kb4 27.Qb7 Ka5 28.Qa7 Kb4 29.Qc5 Ka4 30.Nc3) 21.Qf7 Kd8 22.Qg8 Bf8 23.Qf8 1–0. Pierred (2260) – Computer3, Rated game, 1m + 0s, 2005.

4.Be5 Bb4?? 5.Bg7+– (5.Bb5?! Qg5 6.Nf3 Bf3 7.Qf3 Qe5 8.Qa8 Qb5 9.Qa7 Nc6 10.Qc7 Ba5+=) 5...Bg2 6.Bg2 (6.Bg2 Qg5 7.Ba8 Qg7 8.c3+–; worse 6.Bh8 Bh1 7.Qg4 Ne7 8.Qb4 a6+–) 1–0. DEFFM – GuestSRHV, freechess.org, 2019.

4.Be5 d6 5.Bb2 a6 6.a4+–.

4.Be5 d6 5.Bb2 c5 6.Bb5 Nc6 7.bc5 dc5 8.Nf3 a6 9.Ba4 Rc8 10.0–0 Rc7 11.Ne5 f6?? (11...Qh4 12.f4 f6 13.Nc6 Bc6 14.Bc6 Rc6+–) 12.Qh5 g6 13.Ng6! hg6 14.Qh8 Qe7 (14...Rg7+–) 15.Qg8 Rd7 (15...Qf7 16.Qh8 f5 17.Nc3+–) 16.Qg6 Kd8 (16...Qf7 17.Qe4 Qe7+–) 17.Bf6 (17…Qf6 18.Qf6 Be7 19.Qb2+–) 1–0. Bonetti,Shane – davidf1, ICC, 2002.

4.Be5 d6 5.Bb2 Nc6 6.a3 (6.Bb5 Qg5 7.Nc3 Qg2+–) 6...a5 (6...a6 7.Nf3+–) 7.Bb5 (7.Qf3 Qg5 8.Nc3 ab4 9.Bb5 Nge7 10.ab4 Ra1 11.Ba1 Kd8+–) 7...ab4 (7...Qg5 8.Nc3 Qg2 9.Qf3 Qf3 10.Nf3 ab4 11.ab4 Ra1 12.Ba1+–) 8.ab4 (8.Qf3!? Nge7+–) 8...Ra1+– 9.Ba1 Qa8 (9...Qg5!? 10.Nc3 Qg2+–) 10.Bb2 (10.Bc3 Ba6 11.Na3 Bb5 12.Nb5 Qb7+–) 10...Ba6 (10...Kd8 11.Bc6 Bc6 12.f3+–) 11.Bc6 (better 11.Qe2! Bb7 12.Qc4 Nge7+–) 11...Qc6 12.Nf3 Nf6 (12...Qb7 13.Bc3+–) 13.Na3 (13.Bf6 gf6 14.c3 Bd3+–) 13...Kd7 (13...Be7 14.d3+–) 14.c4! Bc4 15.Qc2 (15.b5 Bb5 16.Qb3 Ba6 17.Qf7 Kc8 18.Qe6 Qd7+–) 15...Bd5+– 16.Qc6 Bc6 17.b5 (17.Bf6 Bf3 18.gf3 gf6+–) 17...Bf3 18.gf3 Nd5 (18...Be7 19.Rg1 Nh5 20.d3+– (worse 20.Bg7 Rg8–/+)) 19.Rg1 f6 (19...Rg8 20.Nc2+–) 20.Ke2 Be7? (better 20...g6+–) 21.Rg7+– h6 (21...Ke8 22.d3+–) 22.d3 Rb8 (22...Ke8 23.Nc2+–) 23.e4 Nf4 24.Ke3 Ne6 25.Bf6 (better 25.Rh7 Ng5 26.Rh6+–) 25...Ng7+– 26.Bg7 d5 (better 26...h5+=) 27.ed5?? (better 27.Nb1 de4 28.fe4 Rb5 29.Nd2+–) 27...Ba3–+ 28.Bh6?? (28.Ke4 h5 29.f4–+) 28...Rb5 (better 28...Bc1 29.Kd4 Bh6–+) 29.Ke4–/+ Kd6?? (better 29...Be7–/+) 30.Bf8+– Kd7 31.Ba3 Ra5 (31...Rb1!?+–) 32.f4?? (better 32.Bb2+–) 32...Ra3–+. GuestZJZG – GuestJVNY, freechess.org, 2016.

4.Be5 d6 5.Bb5 c6 6.Bc3 cb5–/+.

4.Be5+= f6 5.Bc3+/– c6 6.Nf3 Nh6 7.a3 g5? (better is 7...Be7+/–) 8.Ng5!+– Qe7 (8...fg5 9.Qh5) 9.Qh5 Nf7 (9...Kd8 10.Ne4 Ng8 11.Nc5+–) 10.Nh7 Bh6 (10...d6+–) 11.Nf6 Kd8 12.Nd5! cd5 (12...Qe6 13.Bh8 Nh8 14.Qh4 Kc8 15.Ne7 Kc7 16.a4+–) 13.Bh8 Nh8 14.Qh6 Qe8 (14...Nf7 15.Qg7 a6 16.a4+–) 15.Nc3 a6 16.Qb6 Ke7 (16...Kc8+–) 17.Qb7 Nc6 18.Nd5 Ke6 19.Nc7 Ke7 20.Ne8 Ke8 21.Qa8 (21...Kf7 22.Qa6+–) 1–0. Woschkat,Karl_Heinz – Albrecht,Markus, remoteschach.de, 2002.

4.Nf3 d6? 5.Bb5+/– c6 6.Ba4 Nf6 7.0–0 Na6 8.a3 Be7 9.d3 0–0 10.Nbd2 Nc7 11.h3 a5 12.c3 ab4 13.cb4 Ba6 14.Qc2 (14.Bc6 Bd3 15.Ba8 Bf1+–) 14...c5? (14...Bd3 15.Qd3 Ra4 16.Rfc1=) 15.Rac1 (15.bc5!? e4 16.Bf6 Bf6 17.Ne4 Ba1 18.cd6 Rc8+–) 15...Bd3 16.Qd3 Ra4 17.bc5 Ra8? (17...e4 18.Qc2 Qa8 19.cd6 Bd6 20.Ng5+/–) 18.c6 (better is 18.cd6!? Bd6 19.Nc4+–) 18...Qb8 19.Rb1 Qc8 20.Nc4 Ncd5 21.e4 Nf4 22.Qc2 Qc6 23.Nfd2 Bd8 24.f3 Ba5 25.Bc3?? (better is 25.Nb3=+) 25...Bc3–+ 26.Rb6 (26.Ne3 Ne2 (< 26...Ra3 27.Ndc4 Ra4 28.Rb6–+) 27.Kh2 Nd4–+ (27...Ra3?! 28.Ndc4 Nd4 29.Qc1–+)) 26...Qc7 (better is 26...Bd4 27.Kh2 Bb6 28.g3–+) 27.Qb3 (27.Rd6 Rfc8 28.Kh2 Ne8–+) 27...Bd2 28.Nd2 Ra3! 29.Qb5 (29.Qa3 Qb6) 29...Ra2 30.Rc6 (30.g3 Ne2! 31.Qe2 Qb6 32.Qf2 Qb4–+) 30...Qa7 31.Kh1 (31.Qb6 Qb6 32.Rb6 Rd2–+) 31...Rd2 32.Rfc1 (32.Rg1–+) 32...Qb8 33.Qb8 Rb8?? (better is 33...N6h5 34.Qf8 Kf8–+) 34.Rc8= Ne8 35.Rb8 Kf8 36.Rcc8 Ng2?? (better is 36...g5=) 37.Re8 1–0. willi_weizenkeim – Grunert, HCL–C2127 playchess.de, 2003.

4.Nf3 d6 5.Bb5 Bc6 6.Qe2 Bb5 (6...a6 7.Bc4 Nf6 8.0–0+–) 7.Qb5 Nd7 8.0–0 Ngf6 9.d4 (9.Nc3!? Be7+–) 9...Rb8+– 10.Qa4 e4 11.Nfd2 d5 12.a3 Bd6 13.c4 (13.Nc3 0–0+–) 13...0–0 (13...Bh2 14.Kh2 Ng4 15.Kg3 Rb6–/+) 14.c5?? (14.cd5 Nb6 15.Qa5 Nbd5+–) 14...Be7?? (14...Bh2 15.Kh2 Ng4 16.Kg3 Qg5–+) 15.Nc3+– Qc8 16.Nb3 (16.Qa7? Ra8 17.Qa8 Qa8–+) 16...c6? (better 16...Re8+–) 17.Na5 Qa6 (17...Ra8 18.Nc6 Re8+–) 18.Nc6 Qa4 19.Ne7 Kh8 20.Na4 Rfe8 (20...Rbe8 21.Nf5+–) 21.Nc6 (21.Nc6 Rb7 22.Nc3+–) 1–0. GuestPCMQ – GuestCFHB, freechess.org, 2020.

4.Nf3 e4!? 5.Nd4 a6=.

4.Nf3 e4!? 5.Nd4 Bb4 6.Bb5?! Nf6=.

4.Nf3 e4!? 5.Nd4 Bb4 6.Nb5?! Nf6=.

4.Nf3 e4!? 5.Nd4 Bb4 6.Ne6 de6 7.Bg7+/–.

4.Be5+= Nc6!?

5.Bb2 Bb4?? 6.Bg7+– (6.Bb5?! Nf6+/–) 1–0. Suess,Stefan – Petersen, corr, 1986.

5.Bb2 Nb4 6.Bb5?? Bg2 7.a3 Nd5 8.Bg7 Bg7 –+.

5.Bb2 Nb4 6.Nc3 a6=.

5.Bb2 Nb4 6.f3 6...Nf6 (6...a6!?=) 7.Bb5 a6 8.Be2 Nfd5 9.e4 Nf4 10.Nh3 (better is 10.g3!? Ne2 11.Ne2+=) 10...Qh4 11.g3 Ng2 (better is 11...Qh3!? 12.Bf1 Qh6 13.gf4 Qf4+=) 12.Kf2+= Qh3 13.Qg1?? (better is 13.Bf1!?+=) 13...Bc5?? (better is 13...Nc2 14.Qg2 Qh6–+) 14.d4+= Nc2 15.Qg2 Qh6 16.dc5= Qe3 17.Kf1 a5?? 18.Qf2+– a4? 19.Qe3 Ne3 20.Kf2 Nc2 21.Bg7 Rg8 22.Bc3 Rg5 23.Bd2 Na1?? 24.Bg5 Nc2 25.Bd2 Nd4 26.Bc3 Ne6 27.Rd1 0–0–0 28.Bb4 Ng5 29.h4 Nh3 30.Kg2 d5 31.Kh3 Kb8 32.ed5 f5 33.g4 fg4 34.fg4 Bd5 35.Bf3! c6 36.Bd5 cd5 37.Nc3 d4 38.Na4 d3 39.Nb2 Rd4 40.Nd3 Kc7 41.a3 Kc6 42.a4 Rd8 43.Ne5 Kc7 44.Rd8 Kd8+– 45.a5 Kc7 46.h5 h6 47.g5! hg5 48.h6 (48.h6 g4 49.Kg4 Kb7 50.h7 Kb8 51.h8Q Kc7 52.Qg7 Kb8 53.c6 Kc8 54.Qd7 Kb8 55.Qb7) 1–0. Valpa – Dc, playchess.de, 2004.

5.Nf3 Ne5 6.Ne5 Qe7+=.

3.e3 e6

4.a3 c6 5.Nf3 h6 6.c4 a5 7.cb5 ab4 8.ab4 Ra1 9.Ba1 Nf6 10.Qb3 Be7 11.Be2 0–0 12.bc6 Bc6 The passed pawn on b4 will quickly become a dangerous weapon 13.0–0 d6 14.Nc3 White prepares the advance b5 14...Re8 15.b5 Bb7 16.Rc1 d5 17.Nd4 e5 18.Nf3 Bc5 (18...Bd6!?+–) 19.d4+– ed4 20.Nd4 (20.Na4 Bd6 21.Bd4 Nbd7+–) 20...Bb6 (20...Bd4 21.ed4 Nbd7 22.Bb2+–) 21.Qd1 Ne4 (21...Bc7 22.Nf3+–) 22.Ne4 de4 23.Nf5 Qd1 (23...Qg5 24.g4 Re6 25.h4+–) 24.Rd1 f6 (24...Rd8 25.Be5 Rd1 26.Bd1+–) 25.Bd4 (better 25.Nd6!? Re7 26.Nc4 Bc7+–) 25...Bd4 26.Nd4 (26.Nd6 Re7 27.Rd4 Kf8+–) 26...Kh7 27.Rc1 Kg6 (27...Rc8 28.Rc8 Bc8 29.f3+–) 28.Nc6 (better 28.Bg4 h5 29.Bf5 Kh6 30.Be6+–) 28...f5 29.Kf1 Kf6 30.Nb8 Rb8 31.Rc7 ½–½. mrchessplayer – grahamtrue, net–chess.com, 2020.

4.a3 Nf6 5.Bb5?? Bg2–+ 6.f3 Bh1 7.Qe2 (7.Nh3 c6 8.Bf1 Qc7–+) 7...c6 8.Bd3 Bd6 (8...a5 9.b5–+) 9.Qf1 Bh2 (9...Nh5!? 10.Qh3 Qg5 11.Qg4–+) 10.Nh3 (10.Ne2 Bf3 11.Qf3 Bc7–+) 10...Qc7 11.Qh1 Qg3 12.Nf2 (12.Kd1 Qh3 13.Be5 Be5 14.Qh3 Ba1–+) 12...Bg1 13.Kd1 Qf2 14.Bf6 gf6 15.Bh7 (15.c4–+) 15…Qf1 0–1. color1972 – markmooney, ChessWorld.net, 2005.

4.a3 Nf6 5.c4 bc4–/+ 6.Nf3 d5 7.d3 cd3 8.Qd3 (8.Bd3 Nbd7 9.0–0–/+) 8...Nc6 (8...a5!? 9.b5 Nbd7–/+) 9.Be2 (9.Qb5 Qc8 10.Qa4+=) 9...Bd6+= 10.0–0 Qd7 11.Nbd2 Be7 (better is 11...a6+=) 12.Rac1 a6 13.Rc2 0–0 14.Rfc1 Rfd8? (14...Bd6 15.Bf6 gf6 16.Nb3=) 15.Ne5 (better is 15.b5 ab5 16.Rc6 Bc6 17.Ne5+–) 15...Ne5= 16.Be5 c6 17.Nb3 Ne4 18.f3 Bd6 19.Bb2 Nf6 20.Na5 Rdc8 21.Bf6 gf6 22.Qd4 f5 23.Qb6 The pressure on the backward pawn c6 grows 23...Rab8 24.Nb7 (worse is 24.Ba6 Bc7 25.Qa7 Ba6 26.Qa6 Ra8–/+) 24...Rc7?? (24...Rb7!? 25.Qd4 Ra7+=) 25.Qa6 (better is 25.Ba6 Rcb7 26.Bb7 Rb7 27.Qc6+–) 25...Rbb7+/– 26.Rc6 Rc6 27.Rc6 Bb8 28.b5 (better is 28.Bb5+/–) 28...Ra7?? (better is 28...Ba7=) 29.Qc8+– Kg7 (29...Qc8 30.Rc8 Kg7 31.Rb8 Ra3+–) 30.Qb8 1–0. justforfun (2510) – smoothoperator (2255), net–chess.com, 2015.

4.a3 Nf6 5.d4 g6 6.Nf3 Bg7 7.Nbd2 a6 8.c4 bc4 9.Bc4 0–0 10.0–0 d5 11.Bd3 Nbd7 12.Rc1 Ne8 13.Nb3 f5 14.Nc5 Nc5 15.bc5 c6 16.Rb1 Nc7 17.a4 Qf6 18.Nd2 f4 19.Bc1 Rab8 20.Qg4 Ba8 21.Rb8 Rb8 22.Nf3 Rb4 23.Ne5 fe3 24.fe3 Qe5 25.Bd2 Rd4 26.ed4 Qd4 27.Qd4 Bd4 28.Kh1 Bc5 29.Bf4 Ne8 30.Ba6 Ng7 31.Bc8 Bd4 32.Bd6 h5 33.Rf8 Kh7 34.Ba6 Nf5 35.Ba3 c5 36.Ra8 c4 37.Bc8 e5 38.Be6 Ne3 39.Rd8 c3 40.Bd5 Nd1 41.g3 Nf2 42.Kg2 Ng4 43.Be4 Ne3 44.Kf3 c2 45.Ke2 Bc5 46.Bc1 Bd4 47.Rc8 Nd1 48.Bc2 Nc3 49.Kd3 1–0. willow27 – markmooney, ChessWorld.net, 2005.

4.a3 Nf6 5.Nf3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3).

4.a3 g5?? 5.Bh8 Bg7 6.Bg7 1–0. guest507 – guest285, ICC, 1999.

4.a3 Qg5 5.Nf3+– Qg6 (5...Qh5 6.Nc3 a6 7.Be2+=) 6.Nc3 (6.Be5!?+–) 6...a6+= 7.Ne5 Qg5 8.f4 (8.d4 Nc6 9.Nf3 Qh5+=) 8...Qh4+= 9.g3 Qd8 10.Nf3 (10.e4 h5+=) 10...c5 (10...Nf6 11.Bd3+=) 11.bc5+– Bc5 (11...Nf6!? 12.d4 d6 13.cd6 Bd6+–) 12.Ne4!+– Bf8 (12...Be4 13.Bg7 Combination) 13.Nd6! Bd6 14.Bg7 Nf6 15.Bh8 Ne4 (15...Be4 16.Be2+–) 16.Bd3 f6 (16...Bd5 17.Ne5 Nc6 18.0–0+–) 17.Ne5! fe5 (17...fe5 18.Qh5 Double attack (18.Qh5 Decoy)) 18.fe5 (better 18.Qh5 Kf8 19.fe5+–) 18...Bb4 (18...Qg5 19.ed6 Nc3 20.Bc3 Bh1+–) 19.Qh5 Kf8 20.0–0 Kg8 (20...Qf6 21.ef6 Nf6 22.Bf6 Be4 23.Be4 h6 24.Qg6 Bc3 25.dc3 Nc6 26.Bd8) 21.Rf7 Kh8 (21...Qh4 22.Rg7 Kh8 23.Rh7 Kg8 24.Qf7) 22.Qh7 1–0. Pierre – Hansi, internet, 2020.

4.a4 ba4 5.Ra4 Bc6 6.b5+= Bb7 7.Nf3 c6 (7...a6 8.Bd3+=) 8.c4 (8.Nc3 Nf6+=) 8...cb5 9.cb5 Bc5?? (better 9...Nf6+=) 10.Bg7+– Nh6 (10...a6 11.Bh8 ab5 12.Ra8 Ba8 13.Bb5+–) 11.Bh8 Nf5 (11...Be7 12.Nc3+–) 12.Bd3 (12.e4 Nd6 13.Nc3 a6+–) 12...d6 (12...a6 13.ba6 Na6 14.Bf5 ef5 15.Nc3+–) 13.0–0 Nd7 (13...Bb6 14.Bf5 ef5 15.Rh4+–) 14.Bf5 ef5 15.Nd4 (15.d4 Bb6 16.Nbd2 Qe7+–) 15...Bd4 (15...Qg5 16.Nf3 Qh5 17.d4 Bf3 18.Qf3 Qf3 19.gf3+– (19.dc5?! Qd5+–)) 16.Bd4 f6 (16...Nc5 17.Bc5 dc5 18.Qe2+–) 17.Qh5 Ke7 18.Qh7 Ke6 19.Ra7 (19.Nc3 Qg8 20.Qg8 Rg8+–) 19...Ra7 20.Ba7 Qa5 21.Bb8! Qb5 (21...Nb8 22.Qg8 Double attack (22.Qb7 Pinning; 22.Qb7 Deflection; 22.Qg8 Decoy)) 22.Qg8 Ke7 23.Qg7 Ke6 24.Nc3 Qc5 (24...Qa6 25.Bc7 Ne5+–) 25.Ne2 Nb8 26.Nf4 (26.Nf4 Ke5 27.Qe7) 1–0. DEFFM – Vitejvpekle, freechess.org, 2018.

4.a4 ba4 5.Ra4 Nf6=.

4.a4 ba4 5.Ra4 Qh4 6.Nf3 Qe4 7.d4 Qc6 8.c4 Qe4 9.Bd3 Qg4 10.0–0 Nc6 11.Bc3 Nf6 12.d5 ed5 13.b5 Ne7 14.cd5 Nfd5 15.Rg4 Nc3 16.Nc3 a6 17.ba6 Bc6 18.Bb5 h5 19.Ne5 Ng6 20.Rg6 Bd6 21.Rd6 cd6 22.Nc6 Rh6 23.Qd5 Rf6 24.Ne4 Re6 25.Nd4 Rc8 26.Nd6 Kf8 27.Ne6 fe6 28.Qf3 (time, 1–0). Machete99 – guest1330, ICC, 2002.

4.a4 ba4 5.b5 d5 (5...a6 6.ba6 Ra6 7.Ba6 Bg2 8.Qg4 Bh1 9.Bg7–/+) 6.Nf3 Nd7 (6...Nf6 7.Ra4 c6 8.Be5=) 7.c4 (7.Ra4 Ngf6+=) 7...Ngf6 8.Be2 (8.cd5 Bd5 9.Ra4=) 8...d4 (8...dc4!? 9.Bc4 Nb6=+) 9.ed4 (9.Bd4 e5 10.Ne5 Ne5 11.Be5 Bg2+–) 9...c5 (9...a6 10.ba6 (worse 10.Qa4 ab5 11.Qb3 Ra1 12.Ba1 Qa8–/+) 10...Ba6 11.Qa4+=) 10.0–0 (10.dc5 Bc5 11.d4 Bb4 12.Bc3 Bc3 13.Nc3 a6 14.Ra4 0–0+–) 10...cd4 11.Bd4 Bd6 (11...Nb6 12.Be5 a6 13.ba6 Ba6 14.Bf6 gf6 15.d4+=) 12.Ra4 0–0 13.Qc2 (13.Ba7 Qc7 14.Be3 Ra4 15.Qa4 Bf3 16.Bf3 Bh2 17.Kh1 Bf4+–) 13...Qc7 14.d3 Bf3 (better 14...e5!? 15.Bc3 Nc5+=) 15.Bf3+– (worse 15.gf3 Bh2 16.Kg2 Nb6=+) 15...Bh2 16.Kh1 Qf4 17.Ba8 (17.Ra7? Qh4 18.Re1 Bb8 19.Kg1 Qh2 20.Kf1 Ba7 21.Ba8 Bd4–+ (worse 21...Ra8 22.Qa2–+); worse 17.Ba7 Qh4 18.Re1 Ra7 19.Ra7 Bb8 20.Kg1 Qh2 21.Kf1 Ba7–+) 17...Ra8 (17...Qh6!? 18.g3 Bg3 19.Kg2 Bd6+–) 18.Bf6+– (18.Ba7 Qh6 19.Rd1 Bb8 20.Kg1 Qh2 (20...Ba7?! 21.c5 Nc5 22.Ra7 Ra7 23.Qc5=; 20...Ra7?! 21.Ra7 Qh2 22.Kf1 Ba7 23.Qa2 Qh1 24.Ke2 Qh5 25.Ke1–+) 21.Kf1 Ba7–/+; 18.Ra7? Qh4 19.Re1 Bb8 20.Kg1 Qh2 (20...Ba7?! 21.Ba7 Ra7 22.Nd2–+; 20...Ra7?! 21.Ba7 Ba7 22.Qd2–+) 21.Kf1 Ba7–+ (21...Ra7?! 22.Ba7 Ba7 23.Qa2 Qh1 24.Ke2 Qh5 25.f3 Qe5 26.Kd1–/+)) 18...Nf6 19.Nd2 (19.g3 Bg3 20.Kg2 Bh4+–) 19...Qh4 (better 19...Qh6!? 20.Nf3 Ng4=) 20.Nf3+– Qh5 21.Re1 (21.c5 Bd6 22.Kg1 Bc5+–) 21...Bg3? (21...Ng4 22.Re2 Bf4 23.Kg1 Bh2 24.Kf1 Bd6=) 22.Kg1+– (22.Kg1 Bd6 23.Rea1+–) 1–0. GuestNFTH – GuestQCNFA, freechess.org, 2017.

4.a4 a5 5.ba5 Ra5 6.ab5 Ra1 7.Ba1 c6 8.Nf3 cb5 9.Bb5 Bc6 10.Bc6 Nc6 11.0–0 Qa5 12.Nc3 Bb4 13.Ne2 Ne5 14.Be5 Bd2 15.Bg7 Ne7 16.Bh8 Ng6 17.Nd2 Nh8 18.Ne4 Qe5 19.Qd4 Qd4 20.ed4 d5 21.Nf6 Ke7 22.Nh7 Ng6 23.Ra1 Kd6 24.Ng5 f6 25.Ra6 Kd7 26.Ne6 Nf8 27.Nf8 1–0. Machete99 – guest1404, ICC, 2002.

4.a4 a5 5.ab5 ab4 6.Ra8 Ba8 7.Nf3 Nf6 8.Bc4 Bc5 (8...d5 9.Be2=) 9.0–0+= 0–0 10.c3 c6 11.d4 Be7 12.cb4 cb5 13.Bb5 Nc6 14.Qa4 Nb4 15.Nbd2 Nbd5 16.e4 Nb6 17.Qc2 Qc8 18.Qd3 h6 19.h3 (19.g3 Bb7=) 19...d5= 20.e5 Ne4 21.Ba3 Ba3 22.Qa3 Qc3 23.Qc3 Nc3 24.Bd3 Nba4 25.Nb3 Bc6 26.Nc5 Rc8 27.Rc1 Be8 28.Nb3 ½–½. adlai – helicco, internet, 2021.

4.a4 a5 5.ab5 ab4 6.Ra8 Ba8 7.Nf3 Nf6 8.Be2 Be7 9.0–0 0–0 10.d4 Bb7 11.Nbd2 d5 12.Nb3 c6 13.Nc5 Qb6 14.Nb7 Qb7 15.Qd3 Rc8 16.bc6 Qc6 17.Rc1 Ne4 18.Ne5 Qc7 19.Bh5 g6 20.Bg4 Bh4 21.g3 Bf6 22.Nf3 Nd7 23.Nd2 Ndc5 24.Qe2 Bg7 25.Ne4 Ne4 26.Qe1 Qd6 27.Bf3 Qb6 28.Bg2 Qb5 29.Qf1 Qb7 30.f3 Nd6 31.Qd3 Qc6 32.Qb3 Bh6 33.f4 Qb5 34.Re1 Bf8 35.Bf1 Qb7 36.Ra1 Ne4 37.Ba6 Qa8 38.Bc8 Qc8 39.Kg2 Qb7 40.Qa4 Qc7 41.Kh1 Qc8 42.Kg1 Qc7 43.Rc1 Qc8 44.Qb5 Be7 45.Qd3 h5 46.Ra1 Qb7 47.Ra5 Bf8 48.Ra4 Bh6 49.Qb3 Bf8 50.Ra1 Bd6 51.Qa4 Qc8 52.Qa8 Bb8 53.Ra7 Nd6 54.Ra2 Qc2 55.Ba1 Qb1 56.Kf2 Ne4 57.Kg2 Kh7 58.Rb2 Qd1 59.Qa2 Nc3 60.Qa6 b3 61.Qf1 Qf1 62.Kf1 Ne4 63.Kg2 Bc7 64.Rb3 Ba5 65.h3 Kg7 66.Rb2 Be1 67.g4 Bd2 68.Kf3 Bc3 69.Ra2 Bb4 70.g5 h4 71.Ra4 Be1 72.Ra6 Bg3 73.Bb2 Nf2 74.Kg2 Ne4 75.Rc6 Be1 76.Kf3 Bb4 77.Rb6 Ba5 78.Rb5 Nd2 79.Ke2 Nc4 80.Bc1 Bc3 81.Kd3 Nd6 82.Rb8 Ne4 83.Ba3 Be1 84.Ra8 Kh7 85.Ra7 Kg7 86.Ke2 Bg3 87.Be7 Bh2 88.Kf3 Bg3 89.Ra2 Be1 90.Bc5 Bd2 91.Ra7 Be1 ½–½. Machete99 (2365) – Ischoolyouboy (2275), ICC, 2002.

4.a4 a6 5.ab5 ab5 6.Ra8 (6.Bb5? Ra1 (6...Bb4 7.Bg7 Ra1 8.Bh8+=) 7.Ba1 Bg2 (7...Bb4 8.Bg7 Nf6 9.Bh8+–) 8.Bg7 Bg7–+ (8...Bh1?! 9.Bh8 Qg5 10.Ne2 Qb5 11.Ng3–+)) 6...Ba8 7.Nf3 (7.Bb5? Bg2 8.Bg7 Bg7–+ (8...Bh1?! 9.Bh8 Qg5 10.Ne2 Qb5 11.Ng3–+)) 7...Nf6 (7...Bb4 8.Bg7 (8.Bb5?! Nf6=) 8...Nf6 9.Bh8+–) 8.Bb5 Bb4 9.Bc3 Be7 10.0–0 0–0 11.d4 (11.Bf6 Bf6 12.d4 Be7=) 11...Ne4 12.Bb2 d6 (12...f5 13.c4=) 13.c4 Nd7 14.Nfd2 (14.Nc3 c6 15.Ba4 c5=) 14...Ndf6 (14...c6 15.Ba4 Ndf6 16.Ne4 Ne4 17.Nc3+=) 15.Nc3 Qb8 (15...Nc3 16.Bc3 c6 17.Ba6=) 16.Nde4+= Ne4 17.Qe2 Nc3 18.Bc3 Bf6 (18...Qb7 19.f3+=) 19.Ra1 c5 20.Qd3 Rd8 21.Ba4 Qc7 22.Bc2 g6 23.Ba5 Qa7 (23...Qb7!? 24.e4 Rc8= (< 24...Bd4 25.Rb1 Qe7 26.Bd8 Qd8 27.Qf3+=)) 24.Qf1+/– Rc8 25.Bd8! Qa1 (25...Bd8 26.Ra7) 26.Qa1 Rd8 27.Qa5 cd4 28.ed4 Rc8 29.Qa6 Rd8 30.Qb6 (better is 30.c5!? dc5 31.dc5+/–) ½–½. Trigance,Eric – Rosenhahn,Eberhard, corr ICCF TT–4–90 SF, 1995.

4.a4 Bb4?? 5.Bg7 (5.ab5?! Nf6=; 5.Bb5?! Nf6 6.Nf3 a6=) 5...Bg2 6.Bg2+– (6.Bh8?! Bh1 7.Qg4 Ne7 8.Qb4 Ng6+–)).

4.a4 Nf6 5.ab5 Bb4 6.Ra4=.

4.a4 Nf6 5.ab5 Bb4 6.Nf3 0–0 7.Nc3 a5 8.Be2 d6 9.0–0 Nbd7 10.Nd4 Ne5 11.Na4 c6 (11...Bd5!?+=) 12.f4 Ng6 13.bc6 Ba6 (13...Bc8!?+/–) 14.f5+– ef5 15.Nf5 d5 (better is 15...Ne8+–) 16.Ng7! Ne4 (16...Kg7 17.Bf6 Double attack (17.Rf6 Discovered attack; 17.Bf6 Remove defender)) 17.d3 Nc5 (17...Ng5 18.Nf5 f6 19.Bd4+–) 18.Bf6 Qc7 19.Nf5 Qc6 (19...Rfb8 20.c3 Na4 21.cb4 Bb5 22.Nh6 Kf8+–) 20.Nh6 1–0. forsetinn (1905) – sotdalas (1845), gameknot.com, 2013.

4.a4 Nf6 5.Bb5?? Bb4?! 6.Nf3=.

4.a4 Nf6 5.Bb5?? Bg2 6.Be2 Bh1 –+.

4.Bb5?? Bg2 5.Qg4 Bh1 6.Bg7 Nf6 7.Bf6 Qf6 –+.

4.Bb5?? Bg2 5.Qg4 Bh1 6.Bg7 Nf6 7.Qg3 (7.Bf6 Qf6 8.c3–+) 7...Rg8 8.Bf6 Rg3 9.Bd8 Rg1 (9...Kd8?! 10.hg3 Bb4 11.c3=) 10.Ke2 Kd8 0–1. AhmedSultanov (1850) – mghobeish (1755), lichess.org, 2020.

4.Bb5?? Bg2 5.Bg7 Bg7–+.

4.Bb5?? Bg2 5.Bg7 Bh1?! 6.Bh8 Qg5 7.Ne2 Qb5 8.Ng3–+.

4.c4 c5 5.cb5 cb4 6.a4 (6.a3 Nf6+=) 6...a5 (6...Nf6 7.d4=) 7.ba6 (7.Nf3 Nf6=) 7...Ba6 8.Ba6 Ra6 9.Qe2 (9.Nf3 Nf6=) 9...Rb6 (9...Rc6 10.Kd1=+) 10.Bd4 (10.Nf3 Rc6 11.d3 Nf6+=) 10...Rb7 (10...Rc6 11.Qd1–/+) 11.a5 (11.Nf3 Nc6=) 11...Nc6 12.Bb6 (better 12.Bb2=) 12...Qa8–+ 13.Qb5 Nf6 14.a6?? (14.Nf3 Nd5 15.Ra4–+) 14...Rb6 (better 14...Rb8 15.e4 Bd6–+) 15.Qb6+= Nd5 (15...Bd6 16.Nf3+=) 16.Qb7 Qb7 17.ab7 Bd6 (17...Kd8 18.Nf3+=) 18.Ra8 (better 18.Nf3 Ke7 19.Ra8+–) 18...Nd8?? (better 18...Bb8+=) 19.b8Q+– Bb8 20.Rb8 0–0 21.Nf3 Nc6 22.Rf8 Kf8 23.0–0 (better 23.d4 f6+–) 23...b3 (23...f6 24.Rc1+–) 24.Nd4 (24.Nc3 Nc3 25.dc3 Ke7+–) 24...Na5 (24...Nd4 25.ed4 Ke7 26.Nc3+–) 25.e4 (better 25.Rc1!? Ke7 26.Rc5 Nb7+–) 25...Nb4 (25...Nf4 26.g3 Nd3 27.Kg2+–) 26.Nc3 (better 26.Rc1 Nbc6 27.Nc6 Nc6+–) 26...Nd3 (26...b2+–) 27.Ra1 b2 (27...Nc6 28.Nb3 f5+–) 28.Ra5 Nf2 (28...g6+–) 29.Kf2 1–0. GuestJCLC – GuestMFTT, freechess.org, 2017.

4.Ne2 c5 5.bc5 Bc5 6.Bg7 Qa5 7.Bh8 Ne7 8.Bb2 Nbc6 (8...a6 9.Nf4 Qc7 10.Nh5+–) 9.a3 0–0–0 (9...d5 10.Nc1+–) 10.Nf4 (10.Nc1 e5+–) 10...e5 (10...f5+–) 11.Nd5! Nd5 12.Be2 (12.Qf3!? Nb6 13.Qf7 h6+–) 12...Be3 13.fe3 Ne3 14.Qc1 Ng2 15.Kd1 d5 (15...Nf4 16.Bf3+–) 16.Rg1 (16.Rf1 Nf4 17.Bg4 Kb8 18.Be5 Ne5 19.Rf4 Ng4 20.Rg4 d4+–) 16...Nf4 (16...Rg8 17.Bf3 Ne3 18.Ke2 Rg1 19.Qg1 Nc2 20.Qg8 Qd8 21.Bg4 Kc7 22.Qf7 Kb6 23.Qh7 Na1 24.Ba1+–) 17.Bc3 (better 17.Bg4!? Kb8 18.d4 Qa4+–) 17...Qb6 Black prepares d4 18.Bg4 Kb8 (better 18...Kc7 19.Rf1 Rg8+–) 19.Re1?? (19.d4 Rg8 20.Qe3 f5+–) 19...Ng2?? (19...Qf2 20.Qb2 d4=+) 20.Re3?? (better 20.Rf1+–) 20...Ne3–+ 21.de3 d4 22.ed4 (22.Ke1 dc3 23.Nc3 Ne7–+) 22...Nd4 (22...Rd4!? 23.Bd4 Qd4 24.Ke1 Qa1 25.c3–+) 23.Nd2 f5 24.Bh3 (better 24.Bh5 Qh6 25.Be2 Ne2 26.Be5 Ka8 27.Ke2–+) 24...Bf3 25.Ke1 (25.Nf3 Nb3 26.Ke2 Nc1 27.Rc1–+) 25...Nc2 26.Qc2 (26.Kf1 Ne3 27.Ke1–+) 26...Qe3 Black intends e4 27.Kf1 Be2 (27...Qe2 28.Kg1 Rg8 29.Bg2 Qg2) 28.Kg2+– Bf3?? (better 28...Rd3 29.Be5! Qe5+=) 29.Nf3+– e4 (29...Rg8 30.Kh1 Qf3 31.Bg2 Qg2 32.Qg2 Rg2 33.Be5 Kc8 34.Kg2+–) 30.Be5 Ka8 (30...Kb7 31.Qc7 Ka6+–) 31.Qc6 1–0. Akrapovik – MattCf4, lichess.org, 2019.

4.Ne2 Ne7 5.Nf4 d5 (better 5...Nbc6!?=) 6.Bb5+– c6 7.Be2 Nd7 8.0–0 h5 (8...a5 9.ba5 e5 10.Nd3+–) 9.Nh5 (9.Bh5 Rh6 10.a3+–) 9...Ng6? (better 9...Nf5!?+–) 10.Ng7 Bg7 11.Bg7 Rg8 12.Bh6 (better 12.Bb2!?+–) 12...Nh4+– 13.g3?? (13.Bf4!? Ng2 14.Bg3+–) 13...Nf5 (better 13...Qf6!? 14.c3 Qh6=+) 14.Bf4+= e5 Black plans d4 15.e4 Nd4 16.Be3 Ne2 17.Qe2 d4 18.Bh6 (18.f4 de3 19.Qe3 a5 20.ba5 Ra5+=) 18...Qh4= 19.Bf8 (better 19.Be3=) 19...Qh7?? (better 19...Nf8 20.Na3 Ne6–/+) 20.Bc5+– a5 21.d3 Rh8 (21...ab4 22.Bb4 f5 23.Bd6+–) 22.f4 Nc5 (22...f6 23.a4+–) 23.bc5 Opening the b–file gets White a lot of play 23...Bc8 24.fe5 Be6 25.Nd2 Kd7 (25...Qg7 26.Nf3 Bh3 27.Rf2+–) 26.Nc4 (better 26.Qf2 Rad8 27.Qd4 Ke8 28.Qf2+–) 26...Rag8 27.Rab1 Rg3 28.hg3 Qh1 29.Kf2 Qh2?? (better 29...Rh2 30.Ke1 Re2 31.Ke2 Qg2 32.Ke1 Qg3 33.Kd1 Qg4 34.Kc1 Bc4 35.dc4 Qg5 36.Kb2 Ke8+=) 30.Ke1+– Qg3 31.Kd1 Bg4 (31...Bc4 32.dc4 Rh2 33.Qd3 Qg4 34.Kc1 Qg5 35.Kb2+–) 32.Rf7 Ke6 Threatening mate... how? 33.Rf6 Ke7 34.Rb7 Bd7 (34...Kd8 35.Rb8 Ke7 36.Rh8 Be2 37.Ke2 Qg2 38.Ke1 Qg7+–) 35.Kc1 Qg5 36.Kb2 Rh1 37.Nd2 Rg1 38.Qf2 Qg7 (38...Rg2 39.Qd4 Qf6 40.Qd7 Kf8 41.Qc8 Qd8 42.Qd8) 39.Rf7! Qf7 40.Rd7! Theme: Double Attack 40...Kd7 A deflection 41.Qf7 Kc8 42.e6 (42.Nc4 Rg4 43.Nd6 Kd8 44.Qe8 Kc7 45.Qc8) 42...Kd8 (42...Kb8 43.e7 Rg8 44.Qg8 Kb7 45.Qd8 a4 46.Qb6 Kc8 47.e8Q) 43.e7 (43.Qd7) 43...Kd7 44.e8Q 1–0. aravind555 – Khairulbadsha, lichess.org, 2019.

4.Nf3 a5 5.Nd4 (5.Bb5!? ab4 6.a3=) 5...ab4= (5...Bb4? 6.Ne6 de6 7.Bg7+–) 6.Nb5 Ba6 7.Be5 (7.Qf3 d5 8.Qg3 Bb5 9.Bb5 c6 10.Bg7 Bg7 11.Qg7+=) 7...d6?? (7...Bb5 8.Bb5 Qg5–/+) 8.Bd4?? (better is 8.Qf3 Bb5 9.Bb5 Nd7 10.Bd7 Kd7 11.Qf7 Qe7 12.Qf3+/–) 8...e5 9.Bb2 c6 10.Nd6 Qd6 11.c4 Bc4?? 12.Bc4= Ra4?? 13.Qa4+– Nd7 14.Qb3 Nb6 15.Bf7 Kd7 16.Bg8 Nd5 17.Bd5 cd5 18.Qa4 Ke6 19.0–0 h5 20.a3 Qb8 21.Qc6 Bd6 22.ab4 Qb4 23.Bc3 Qe4 24.d4 Rh6 25.de5 Rg6 26.ed6 Qg2 0–1. war_child – WirralBoy, ChessWorld.net, 2012.

4.Nf3 a6 (--> 2.Bb2 Bb7 3.e3 a6 4.Nf3 e6).

4.Nf3 a6 5.a3 Nf6 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6).

4.Nf3 a6 5.c4 bc4 6.Bc4 Nf6 7.a3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

4.Nf3 c6 5.a4 Nf6 6.ab5 Bb4 7.bc6 Bc6 8.c3 Bc5 9.d4 Bb6 10.Ne5 d6 11.Nc6 Nc6 12.Bb5 Rc8 13.Qf3 Qd7 14.c4 0–0 15.d5 Nb4 16.Bd7 1–0. Machete99 – Zecke, ICC, 2002.

4.Nf3 c6 5.c4 Bb4?? 6.cb5?! Nf6=.

4.Nf3 c6 5.c4 Bb4?? 6.Bg7 bc4 7.Bc4+–.

4.Nf3 c6 5.c4 bc4 6.Bc4 Nf6 7.a3 d5 8.Bb3 c5 9.Ba4 Nbd7 10.bc5 Bc5 11.d4 Bd6 12.Nc3 0–0 13.Nb5 Be7 14.0–0 Rb8 15.Ne5 (15.Na7? Qb6 16.Ne5 A) 16...Qb2 A1) 17.Nd7? Nd7 18.Bd7 Qb6–+ (18...Ba3?! 19.Nb5+=); A2) 17.Bd7 Ba6 18.Nac6 Ba3 19.Nb8 Bf1 20.Rb1=; B) 16...Qa7 17.Bd7 Ba8 18.Be6 fe6–+) 15...a6 16.Nd7 Qd7 17.Nc3 Bc6 18.Bc6 Qc6 19.Qc2 Rfc8 20.Rac1 Ne4 21.Qe2 Rb2 (21...Nd6!?–/+) 22.Nd5=+ ed5 (22...Qd5 23.Rc8) 23.Rc6 Re2 (23...Rc6?? 24.Qb2 Rd6 25.Qb7+–) 24.Rc8 Bf8 25.Rb1 (better is 25.Ra8=) 25...Ng5?? (25...Nd2!? 26.Rbc1 g6=+) 26.f4 (26.Kf1 Ra2 27.h4=) 26...Nh3?? (26...Ne4 27.Kf1 Rf2 28.Ke1 Rf1 29.Kf1 Nd2 30.Ke2 Nb1+/–) 27.gh3+– (27...Re3 28.Rbb8+–) 1–0. Borrmann,Fritz – Wartig,Wolfgang, email b4–00–01, 2000.

4.Nf3 Nc6 5.a3+= a5 6.Bb5 ab4 7.a4 (7.Bc6 Bc6 8.ab4 Ra1 9.Ba1 Ne7+=) 7...Na7 (7...Nf6 8.0–0=) 8.Bc4 (8.Be2 Nc6=) 8...d5 9.Bb3 (9.Be2 Nf6+=) 9...Nc6 (9...c5 10.d3=) 10.Qe2 Ba6 11.d3 Nf6 12.0–0 Ne4 (12...Bd6 13.Nbd2=) 13.Nfd2 (13.a5 Qd6+=) 13...h5 (13...Na5 14.Rd1=) 14.Qf3 (14.Nf3 Na5 15.Qd1 Nb3 16.cb3 Nc5=) 14...Nd2 (14...Nc5 15.Rc1+=) 15.Nd2 Qg5 16.Rfd1 (16.Qe2 Bd6+=) 16...Rh6 (16...Bd6 17.Nc4+=) 17.e4+= d4 (17...Na5 18.ed5 Bb7 19.Ne4+–) 18.e5!+/– Bb7 (18...Ne5 19.Qa8) 19.Bd4! Rb8? (19...Nd4 20.Qb7) 20.Be3+– Ne5? 21.Bg5 Nf3 22.Nf3 Rg6 23.h4 f6 24.Be6 fg5 25.Re1 Be7 26.Ng5 Bc8?? 27.Bf7 Kf8 28.Bg6 b3 29.Nh7 Kg8 30.Re7 Bb7 31.cb3 c5 32.Rae1 (32...Bc6 33.R1e5+–) 1–0. Rohrbacher,W – Wojsyk,G, Schwetzingen, 1994.

4.Nf3 Nc6 5.a3 a6 6.c4 bc4 7.Bc4 Nf6 8.0–0 d5 9.Bd3 Bd6 10.Qc2 e5 11.Ba6?? (better is 11.b5 Na5 12.Be5 ab5 13.Bb5 c6 14.Be2+/–) 11...Nb4?? (better is 11...Ra6 12.b5 Rb6 13.bc6 Rc6–/+) 12.ab4+– Ba6 13.Qc6 Nd7 14.Ra6 0–0 (14...Ra6 15.Qa6 e4+–) 15.Ra8 Qa8 16.Qd7 Rd8 17.Qg4 f6 18.Qe6 Kf8 19.Nc3 Bb4 20.Nh4 Rd6 (20...Qb7 21.Rb1+–) 21.Qg4 (21.Qg4 Qb7 22.Nf5+–) 1–0. Lauko,M (1985) – Lastovicka,Ja, 4th South Bohemia Open, 2010.

4.Nf3 Nc6 5.a3 d6 6.Bb5+– Be7?? (better 6...a6 7.Ba4 Nf6+–) 7.Bg7+– Bf6 8.Bh8 Ba1 (8...Bh8 9.d4 Nf6+–) 9.Ba1 Nf6 (9...a6 10.Ba4+–) 10.Nd4 Qd7 11.Nc6 Bc6 12.Bc6 Qc6 13.Bf6 Qg2 14.Rf1 Qh2 (14...a5+–) 15.Qf3 Qh6 16.Qc6 Kf8 17.Qa8 1–0. GuestYZBW – milashov, freechess.org, 2019.

4.Nf3 d5 5.Bb5 Bc6 6.Be2 Bb4 7.Bg7 Be7 1–0. GuestDZVC – GuestDFMC, freechess.org, 2017.

4.Nf3 d5 5.Bb5 Bc6 6.Be2 Nf6 7.b5 Bd7 8.0–0 c6 9.a4 cb5 (9...a6 10.ba6 Be7 11.a7 Ra7 12.Be5+–) 10.ab5+– a6 (10...Bc8 11.Bd4+–) 11.c4 (11.ba6 Bd6 12.Ne5 0–0+–) 11...Bc8 12.cd5 Qd5 13.Nc3 Qd8 (13...Qd6 14.Qa4 a5 15.Ba3+–) 14.Qb3 (14.ba6 Qb6 15.Qa4 Bd7+–) 14...Bb7 (14...Qb6 15.Rfc1 Nbd7 16.Na4+–) 15.Ne5 (better 15.ba6 Bc8+–) 15...ab5? (better 15...a5+–) 16.Bb5 Nbd7 17.Bd7 Nd7 18.Nd7 (better 18.Qb7 Rb8 19.Qc6+–) 18...Qd7 19.Ra8 Ba8 20.Ra1 Qb7?? (better 20...Qc8+–) 21.Qa4 Ke7 The mate threat is Qxg2 22.Qa8 Qb2 (22...Qa8 23.Ra8 f6+–) 23.Ra7 Kf6 24.Ne4 (24.Qf3 Kg6 25.Qf7 Kh6 26.Qe6 Kh5 27.Qh3 Kg6 28.Ra6 Qb6 29.Rb6 Bd6 30.Rd6 Kf7 31.Qe6 Kf8 32.Rd8) 24...Kg6+– Threatening mate: Qc1 25.Ra1 (25.f3 Bc5 26.Qh8 Ba7+–) 25...Bc5 (25...Bb4 26.Qa2 Qa2 27.Ra2+–) 26.Qa5 Rc8 27.Rf1 (27.Nc5?! Rc5 28.Qa6 Rc1 29.Rc1 Qc1 30.Qf1 Qd2 31.Qb1 Kf6=) 27...f5?? (better 27...Qe5 28.Qa6 Rc7 29.Nc5 Qc5 30.Qd3 Qf5+–) 28.Nc5+– Qc2 (28...Qe5 29.d4 Qd6 30.Rb1+–) 29.Ne6 Qc1 (29...Qe4 30.Nf4 Kf6 31.Qa7+–) 30.Nf4 (better 30.e4 Kf6 31.Qf5 Ke7 32.Ng7+–) 30...Kg5 (30...Kf6 31.d4 Qc6+–) 31.h4! Kh4 Deflection from f5 32.Rc1 (32.Qf5 Qf1 33.Kf1 Rc1 34.Ke2 Re1 35.Ke1 h6 36.g3) 32...Rc1+– 33.Kh2 g5 34.Ne6 (34.Qf5 Rh1 35.Kh1 gf4 36.ef4 h5 37.g3) 34...g4 (34...Rf1 35.Qf5 Rh1 36.Kh1 h5 37.Qg5) 35.Qf5 (35.Qd8 Kh5 36.Qg5) 35...Rf1 (35...Rh1 36.Kh1 h6 37.Qf6 Kh5 38.Nf4) 36.Qg5 (36.Qh7) 1–0. aravind555 – harunnur, lichess.org, 2018.

4.Nf3 f5 5.Bb5 c6 (5...Nf6!?+=) 6.Bc4 d5 7.Bd3 e5? (better 7...Nf6 8.Ng5 Qe7+–) 8.Be5 (8.Ne5 Nf6+–) 8...Ne7 (8...Nd7 9.Bd4 Ngf6 10.Ng5 Bb4 11.Bf5+–) 9.0–0 Ng6 (9...Nd7 10.Bd4+–) 10.Bb2 (better 10.Bc3 Ba6+–) 10...f4 (10...Bb4 11.Bg7 Rg8 12.Bc3+–) 11.Bg6 (11.Re1!? fe3 12.Re3 Kf7+–) 11...hg6 12.ef4 Bd6 (12...Qd7 13.a3 Qf5 14.Re1 Kf7 15.Ng5 Kg8 16.Be5+–) 13.Bg7 Rg8 (13...Rh5 14.g4 Rh7 15.Re1 Kf7 16.Ng5 Kg8 17.Nh7 Kg7 18.Ng5+–) 14.Re1 Kf7 (14...Kd7 15.Be5 Bb4 16.Nc3+–) 15.Ng5 Qg5 (15...Kg7 16.Ne6 Kf7 17.Nd8 Rd8 18.Qg4+–) 16.fg5 Rg7 (16...Kg7 17.Qg4 Bc8 18.Qd4 Kh7+–) 17.Qf3 Kg8 18.Re8 Kh7 (18...Bf8 19.Qf8 Kh7 20.Qh8) 19.Qh3 1–0. GuestNBLH – GuestWBRB, freechess.org, 2019.

4.Nf3 f6 5.Nh4 (5.Bd4 Nc6=) 5...Bb4 6.Qh5 Ke7 (6...g6 7.Qb5 Nc6 8.Qb7+–) 7.Qb5 Bd2 8.Nd2 Bc6 9.Qh5 Qf8 (9...Qe8 10.Qg4 Kf7+–) 10.Ba3 (10.Ng6 hg6 11.Qh8 Nh6+–) 10...d6 11.Ng6! hg6 12.Qh8 (12...Bd5 13.e4+–) 1–0. Wall,Bill – Banker,Jay, internet, 2003.

4.Nf3 f6 5.Nh4 g6+=.

4.Nf3 Nf6 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6).

4.Nf3 Nf6 5.a3 a6 6.c4 bc4 7.Bc4 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

4.Nf3 Nf6 5.c4 a6 6.a3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4).

4.a3 a6

5.Nf3 d5 6.d3 c6 7.Nbd2 a5 8.Be2 ab4 9.ab4 Ra1 10.Qa1 f6 (10...Bb4?? 11.Bg7 Nd7 12.Bh8+–) 11.c3 Be7 12.0–0 Nh6 13.Nb3 e5 14.Qa7 Qc8 15.Nc5 (15.Na5 Ba6+/–) 15...Bc5+= 16.Qc5 Nd7 17.Qa7 0–0 18.Ra1 Nf7 19.Nd2 Nd6 20.Nb3 Qa8 21.Qa8 Ra8 22.Ra8 Ba8 23.Nc5 Nc5 24.bc5 Nb7 25.d4 ed4 26.cd4 Nd8 27.Bc3 Bb7 28.Ba5 Ne6 29.f3 h5 30.h4 g5 31.hg5 fg5 32.g3 Bc8 33.Kg2 Kg7 34.f4 gf4 35.gf4 Kh6 36.Kg3 (36.Bd2 Kg6 37.Bd3 Kf6=) 36...Ng7+= 37.Kh4?? (better is 37.Bf3+=) 37...Nf5–+ 38.Kh3 Ne3 (38...Ne3 39.Kh2 Bg4–+) 0–1. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

5.Nf3 Nf6 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6).

5.Nf3 Nh6 6.c4 Qh4?? (better is 6...a5+=) 7.Nh4+– 1–0. Wall,Bill – Nadeem, chess.com, 2009.

4.Bb5?? Bb4?!

5.Nf3 Nf6= 6.a3 Ba5 7.0–0 a6 8.Ba4 0–0 9.d4 d5 10.Nbd2 Nbd7 11.c4 Bd2 12.Nd2 (worse is 12.Qd2 Nb6 13.Bb3 dc4+=) 12...dc4 13.Nc4 Nb6 14.Nb6 cb6 15.Qe2 Qd5 16.f3 Rfd8 17.e4 Qh5 18.Rfe1 1–0. Fournier,Frederic – Bessis,Stephane Albert, Active, 1994.

5.Qg4 Nf6 6.Qg3 0–0=.

5.Qg4 Bf8 6.Bg7+=.

5.Bg7 Nf6 6.Bh8 Bg2 7.a3=.

5.Bg7 Nf6 6.Bh8 Bg2 7.c3=.

5.Bg7 Nf6 6.Bh8 Bg2 7.Be2 Bh1 8.Bf3 Bf3 9.Qf3+=.

5.Bg7 Bg2 6.Bh8 Bh1 7.a3 a6 8.ab4+= Qh4?? (better 8...ab5 9.Ra8 Ba8+=) 9.Be2 Qh2 10.Bd4 (better 10.Nf3 Bf3 11.Bf3+–) 10...Qg1–/+ 11.Bf1 Bg2 12.Ke2 Bf1 13.Qf1 Qg4 14.Ke1 e5 (14...Nc6 15.Bc3 Rb8 16.Qa6 Nb4 17.Bb4 Qb4 18.Nc3–/+) 15.Bc3 (15.Be5 A) 15...Qb4?? 16.Qg2 (16.Bc7?! Nc6 17.Nc3 Ra7+=) 16...Nc6 17.Qg8 Qf8 18.Qh7 Ne5 19.Qe4+–; B) 15...Nc6 16.Bc3 Rb8= (16...Nb4? 17.Bb4 Qb4 18.Qg2+–)) 15...d6 16.Ra6?? (better 16.b5=) 16...Na6–+ (worse 16...Ra6 17.Qb5 Kf8 18.Qb8 Kg7 19.Na3 Qg1 20.Ke2 Ra3 21.Qc7 Qg4 22.Ke1–+) 17.b5 (17.Qb5 Kd8 18.Qb7 Qg1 19.Ke2 Rb8 (19...Qb1?! 20.Qa8 Ke7 21.Qa6=) 20.Qa6 Qb1–+) 17...Nc5 (better 17...Nb4 18.f3 Nc2 19.Kf2 Qh4 20.Ke2 Qc4 21.d3 Qb5–+) 18.Qc4 (18.Qe2 Qg1 19.Qf1 Qf1 20.Kf1–+) 18...Qc4 19.Kd1 Qf1 0–1. atif_zubair – imiskoubras, lichess.org, 2019.

4.Nf3 Bb4??

5.Bb5?! Nf6=.

5.Be2?? c5?? 6.Bg7+– (6.Bb5?! Nf6=) 6…Nc6 (7.Bh8 a6+–; 6...Ne7 7.Bh8 Ng6 8.Bg7+–). marcosr – stefandima (1790), net–chess.com, 2005.

5.Bg7 a6 6.Bh8+–.

5.Bg7 Bf3 6.Qf3 Nc6 7.Bb5 Nge7 (7...Qg5 8.Bh8 Qb5+–) 8.Bh8 Qb8 (8...Rb8 9.Qh5 Ng6 10.Bg7+–) 9.a4 (9.Qh5 Qb6+–) 9...a6 10.Bc6 Nc6 11.Kf1 (11.Qh5 d5+–) 11...Qb6 (11...Bd6 12.Nc3+–) 12.Bd4 (12.Qh5!? Rb8+–) 12...Qb7 13.c3 (better 13.Nc3!? Rb8 14.Bf6 Ne7+–) 13...Be7 14.Ke2 Qb2 15.c4 Qb4 (15...Qd4 16.Qc6! dc6 17.ed4+–) 16.Nc3 (16.d3 Nd4 17.ed4 Rd8+–) 16...Rb8 (16...Qc4 17.Kd1+–) 17.Rab1 Qa5 (17...Qc4 18.d3 Rb1 19.dc4 Rh1+–) 18.Rb8 Nb8 19.Rb1 (better 19.Qa8 Bd8 20.Qb8 Qf5+–) 19...Nc6 20.Bf6 (20.Rb7 e5 21.Ba7 h6+–) 20...Qc5 21.Be7 (21.d3 Bf6 22.Ne4 Qe5+–) 21...Ke7 (21...Qc4 22.Ke1 Ke7 23.Qe4+–) 22.Nd5 (better 22.Qf4 d6+–) 22...ed5 23.Qd5 (worse 23.cd5 Qc4 24.Ke1 Nb4+–) 23...Qa3 24.Qg5 (24.Qe4 Kf6+–) 24...Kf8 25.Qh6 Ke8 26.Qh7 Qa4 27.Qh8 Ke7 28.Qh4 Ke8 29.Qe4 Kf8 (29...Kd8 30.Qd5+–) 30.h4 Qa2 (30...Qa5 31.Qd5+–) 31.h5 Ne7 (31...Qa5 32.Qd5 Qd5 33.cd5 Ne7+–) 32.Rb8 Kg7 33.Qe5 Kh7 (33...f6 34.Qe7 Kh6 35.Qf6 Kh5 36.Rh8 Kg4 37.Rh4) 34.Qh8 1–0. sirgeshdb (1685) – UltimaRatio4 (1685), lichess.org, 2020.

5.Bg7 Bf3 6.Qf3 Bd2 (6...c6+–) 7.Nd2 Ne7 8.Bh8 Ng6 (8...Nbc6 9.Bb5 Nb4 10.Qe4+–) 9.Qa8 (better is 9.Bf6 Nh4 10.Qa8 Qf6 11.Qb8 Ke7+–) 9...Nh8 10.Bb5 Na6 11.Qd8 (11...Kd8 12.Ba6+–) 1–0. Van Rooijen,Peter (1855) – Fuss,Robert, remoteschach.de, 2005.

5.Bg7 f6 6.Bh8 Qe7 7.Bb5 a6 8.Be2 Nc6 9.0–0 0–0–0 10.Nh4 (better 10.c3 Bd6+–) 10...Nh6 11.Bf6! Qf6 12.c3 Bd6 (12...Qh4 13.cb4 Rg8 14.f3 Qb4 15.Nc3+–) 13.Nf3 Rg8 14.d4 Ng4 15.Nbd2 (15.g3 Qg6 16.Qd3 Nf6+–) 15...Ne7 (15...Qg6 16.Qb1 Qh5 17.Rc1 Nh2 18.g3+–) 16.e4 (better 16.Rb1 Bh2 17.Nh2 Ne3 18.Bf3 Nd1 19.Bb7 Kd8 20.Rfd1+–) 16...e5 (16...Qg6 17.g3 Nh2 18.e5+– (18.Kh2?? Bg3 19.Kg2 Bf4 20.Ng5 Qg5 21.Bg4 Bd2–+; 18.Nh2?! Bg3 19.Bg4 Bf4+–)) 17.d5 (better 17.Qb3 c5 18.Rab1 Bc6 19.Ba6 Kd8+–) 17...h5 (17...Qg6 18.Nh4 Qg5 19.Ndf3+–) 18.Rb1 Ng6 Black prepares the advance h4 (18...Bc5+–) 19.Qb3 Kd8 20.Qb7 Ke7 21.c4 (21.Qa6 Nf4 22.Bc4 Nh2+–) 21...h4 (21...Nf4 22.Bd1 Bc5 23.g3 Nf2 24.Rf2 Nh3 25.Kg2 Nf2 26.Qc7+–) 22.Nb3 (22.c5 Bc5 23.Qc7 Qd6 24.Qd6 Kd6 25.Nc4 Ke7 26.d6 Bd6 27.Nd6 Kd6 28.Rfd1 Kc7 29.Ba6 Nf6+–) 22...h3 (22...Nf4 23.Bd1 Nh3 24.gh3 Ne3 25.Ng5 Qg5 26.Bg4 Ng4 27.f4 (27.hg4?? Qg4 28.Kh1 Qf3) 27...ef4 28.Kh1= (28.hg4 Qg4 29.Kf2 Qg2 30.Ke1 Qe4 31.Kd1 Qb1 32.Nc1 Qb7 33.Nb3 Qb4 34.Re1 Kd8 35.c5 Qc3 36.a4 Qb3 37.Kd2 Rg2 38.Re2 Qe3 39.Kc2 Re2 40.Kd1 Qd2)) 23.c5 (better 23.g3 Nf4 24.gf4 Qf4+–) 23...hg2 24.cd6 cd6 25.Rfc1 (better 25.Na5 gf1R 26.Kf1+– (26.Bf1 Qf3 27.Qd7 Kd7 28.Rb7 Ke8 29.Rb8 Kf7 30.Rb7 Kf6 31.Rf7 Kf7 32.Bg2 Qf2 33.Kh1 Qe1 34.Bf1 Qf1; 26.Rf1 Nf4 27.Nc6 Kf8 28.Qc8 Kg7 29.Qd7 Kh8–+)) 25...Nf4–+ 26.Ba6 (26.Qd7 Kd7 27.Nc5 dc5 28.Rb7 Kc8 29.Rc7 Kc7 30.d6 Kd8 31.h4 Ne2 32.Kg2 Ne3 33.Kh2 Qf4 34.Kh3 Qf3 35.Kh2 Qg2) 26...Nf2 (26...Nh3 27.Kg2 Ne3 28.Kh3 Qf3 29.Kh4 Qg4) 27.Kf2+– Nh3 28.Ke2 Rf8 (28...Qf4 29.Ng1 Qe4 30.Kd2 Qf4 31.Kc2 Qf2 32.Kc3 Ng1 33.Rg1+–) 29.Rc3 (better 29.Nbd4! g1N 30.Kf1 Kf7 31.Qd7 Kg6+–) 29...g1Q 30.Rg1 (30.Ng1!? Qf2 31.Kd3 Ng1+–) 30...Ng1 31.Kd2 (better 31.Ng1 Qf2 32.Kd3 Qg1 33.Rc7+–) 31...Nf3 32.Kc2 Ne1 (32...Qf4 33.Rc7 Qe4 34.Kc3+–) 33.Kb2 (better 33.Kd1 Nf3 34.Be2 Ng5+–) 33...Qf2 34.Ka3 Nc2 35.Ka4 Ne3 36.a3 Nd1 (36...Qf4 37.Bd3 Nd1 38.Rc7 Nb2 39.Ka5+–) 37.Rc7 Nb2 38.Ka5 Qe1 39.Kb6 (better 39.Qb4 Qe3 40.Qd2 Qb3 41.Qg5 Rf6 42.Qg7 Rf7 43.Rd7 Kd7 44.Qf7 Kd8 45.Qf8 Kd7 46.Bb5 Qb5 47.Kb5+–) 39…Na4 (39...Na4 40.Kb5 Nc3 41.Kc4 Ne4 42.Rd7 Kf6+–). alessandrocarvalhaes (1865) – falanga (1940), lichess.org, 2020.

5.Bg7 f6 6.Bh8 Qe7 7.Nd4 h6 (7...a6 8.Qg4 Qf8 9.a4+–) 8.Qh5 Kd8 9.Qg6 Qf8 10.Bg7 Qc5 (10...Qe7+–) 11.Qf7 Ne7 (11...Nc6 12.Bb5 a6 13.Bc6 Bc6 14.a3+–) 12.Bf6 (12.Qf8) 12...Nbc6 13.Qf8 1–0. GuestFWPX – GuestHKJB, freechess.org, 2017.

5.Bg7 Nf6 6.Bh8 Bf3 (6...a6 7.a4+–) 7.Qf3 (7...Nd5 8.Bb5+–) 1–0. nordlicht – Sanji, mySchach.de, 2003.

3.e3 f6

4.Nf3 Nc6 5.a3+= e5 (5...a5 6.Bb5 ab4 7.Bc6 Bc6 8.ab4 Ra1 9.Ba1+=) 6.Bb5+/– a6 7.Bc4 a5 8.b5 Nce7 9.0–0 c6 10.a4 cb5 11.ab5 d5 12.Bb3 e4 (12...Nf5!? 13.d4 e4 14.Nfd2+–) 13.Nd4+– Nh6 14.f3 f5? (better is 14...Qd7+–) 15.fe4 de4 (15...Qd7 16.ed5 Nd5 17.Nc3+–) 16.Ne6 Qb6 17.Bd4 Qd6 18.Qh5 g6 19.Qh3 Bd5 (19...Nd5 20.Nf8 (worse is 20.Bh8 Qe6 21.Nc3 Qd6+–) 20...Qf8 21.Bh8 Qh8 22.Qh6 Qa1 23.Nc3+–) 20.Nf8 (20.Bh8?! Qe6 21.Ba4 Bc4+–) 20...Rf8 21.Bd5 Nd5 22.Qh6 0–0–0 23.Ra5 Nf6 24.Ra8 Kd7 25.Ra6 Qh2 26.Qh2 (26.Qh2 f4 27.Qh3 Kc7 28.Qe6 Rb8 29.Ra7 Rb7 30.b6 Kd8 31.Ra8 Rb8 32.Rb8) 1–0. Fournier,Frederic – NN, Active, 2011.

3.e3 Nf6

(--> 2.Bb2 Nf6 3.e3 Bb7).

4.Nf3 a6 5.c4 bc4 6.Bc4 e6 7.a3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

3.e3 h5

4.Bb5?? Bg2 5.Ne2 Bh1 –+.

4.Nf3 a6 5.a4 f6 6.Nh4 c6 7.Be2+– Rh6?? 8.Bh5 g6 9.Bg6 Rg6 10.Qh5 d6 11.Qg6 Kd7 12.Qg8 Kc7 13.Ng6 Nd7 14.Nc3 Kb6 15.ab5 cb5 16.Nd5 Bd5 17.Qd5 Ne5 18.Bd4 Kc7 19.Be5 de5 20.Qd8 Kd8 21.Nf8 Ke8 22.Ne6 (22...Kf7 23.Nc5+–) 1–0. pcmvr (1700) – tmitchell (1710), net–chess.com, 2006.

4.Nf3+= Rh6 5.Bb5 Nc6 (5...Rb6!? 6.Be2 Rb4+/–) 6.a3+– e6 7.Be2 g5 8.c4 (better is 8.b5!? Na5 9.0–0+–) 8...g4+= 9.Ng1 (9.Nd4 Nd4 10.Bd4 Bg2 11.Rg1=) 9...Qg5 (better is 9...Nb4 10.Kf1 Na6=) 10.Nc3 Ne5 (better is 10...a5 11.b5 Nce7+/–) 11.f3?? (better is 11.e4 Ng6 12.d4+–) 11...gf3–+ 12.Nf3 Nf3?? (better is 12...Qg2 13.Rf1 Bf3 14.Rf3 Be7–+ (14...Nf3?! 15.Bf3 Qg1 16.Ke2 Qh2 17.Kd3–+; 14...Qh2?! 15.Qa4–+)) 13.Bf3+– (13.gf3?! Qg2 14.Rf1 Qh2=) 13...Bf3 14.Qf3 (14.gf3?! Qg2 15.Rf1 Qh2=) 14...Rb8 15.Ne4 Qg6 16.0–0 Rh7 17.Nf6 Nf6 18.Qf6 Qg4 19.Qf3 Qg6? 20.Qg3 Qe4?? 21.Qf3 Qg6 22.Qg3 Qh6?? 23.Qc7 Rd8 24.Qa7 h4 25.Qc7 h3 26.g3 Qh5 27.Rf2 Bg7 28.Bg7 Rg7 29.Qe5 Rg5 30.Qf4 Rf5 31.Qh4 Qh4 32.gh4 Rh5 33.Rf4 Ke7 34.Kf2 Rg8 35.Rg1 Rgh8 36.Rgg4 f5 37.Rg5 Rh4 38.Rh4 Rh4 39.c5 Kf6 40.Rg8 Rc4 41.Ra8 Rc2 42.Ke2 Rb2 43.Ra5 Ke5 44.b5 Kd5 45.c6! dc6 46.b6 c5+= 47.Ra6 Kc6 48.Kd3 Rb6 49.Rb6+/– (49.Rb6 Kb6 50.Ke2=) 1–0. Fournier,Frederic (1860) – neoshams (1655), Active (5/0), 2005.

3.e4 a5

4.a3 ab4 5.ab4 Ra1 6.Ba1 Be4 7.Nc3 Ba8 8.Nb5 Nc6 9.c3 e6 10.Nf3=.

4.a3 ab4 5.ab4 Ra1 6.Ba1 Nf6 7.Nc3 e5 8.Qb1 Ne4=+ 9.Ne4 Be4 10.f3 Bc6 11.Be5? Qe7–+ 12.d4 f6 13.c3 fe5 14.de5 Qe5 15.Kd2 g6 16.Kc2 Bg7 17.Ne2 Qf5 18.Kb2 Qb1 19.Kb1 0–0 20.h4 Bd5 21.Nd4 Bd4 22.cd4 Rf4 23.Bb5 Rd4 24.Kc1 Rb4 25.Be2 Nc6 26.g3 Nd4 27.Kd2 Rb3 28.Rc1 Ne2 29.Ke2 Bf3 30.Kf2 Bc6 31.Re1 Rf3 32.Kg1 (32.Kg2 Bd5–+) 0–1. boldeagle – Double Wood, ChessWorld.net, 2005.

4.a3 Be4 5.Nc3 Bb7 6.Nb5 ab4 7.Qg4 Nf6 8.Qb4 Nc6 9.Qb3 e6 10.Be2=.

4.a3 e6 5.f3 (5.ba5 Ra5 6.Bc3 Ra4 7.Bb5 Re4 8.Kf1 Qg5 9.Bd3 Re1 10.Ke1–/+) 5...c6 6.a4 ab4 7.ab5 Ra1 8.Ba1 d5 9.ed5 Qd5 10.Bd3=.

4.ba5 Ra5 (4...Be4 5.Nc3 Bc6 6.Nb5 e6 7.Nf3 Ra5 8.a4 Nf6 9.Bc3 Ra8 10.Bf6+=; 4...Nf6 5.e5 Nd5 6.Nc3 Ra5 7.Nb5 Nf4 8.Nf3 Ng2 9.Bg2 Rb5 10.Bc3+=) 5.Bc3 Ra7 6.Bb5 Be4 7.Nf3 e6 8.0–0 Nf6 9.a4 Bc5 10.d4+=.

4.Bb5 A) 4...ab4 5.f3 (5.d3 e6 6.a4 ba3 7.Na3 Ba3 8.Bg7 Qg5 9.Bh8 Qb5 10.Rb1=) 5...e5 6.a3 c6 7.Bd3 ba3 8.Na3 Nf6 9.Nc4 Ra1 10.Ba1=; B) 4...Nf6 5.ba5 (5.f3 ab4 6.a4 e6 7.Ne2 c6 8.Bd3 Bc5 9.e5 Nd5 10.c4=) 5...Ne4 6.Nf3 Ra5 7.Qe2 e6 8.0–0 Nd6 9.Bd3 Nc6 10.a3=; C) 4...Be4 5.f3 Bf5 6.a3 e6 7.h4 c6 8.Be2 h5 9.ba5 Qc7 10.Kf2+=.

4.f3 A) 4...ab4 5.Bb5 e5 6.a3 c6 7.Be2 Qg5 8.g3 ba3 9.Na3 d5 10.ed5+=; B) 4...Nc6 5.a4 (5.Bb5 ab4 6.Nh3 Nf6 7.d4 e6 8.0–0 Be7 9.a3 0–0 10.Qd3=) 5...e6 6.ab5 Nb4 7.c3 Be4 8.cb4 Bb1 9.Qb1 Qh4 10.g3+–; C) 4...e6 5.a4 (5.Bb5 ab4 6.a4 Nf6 7.Nh3 Be7 8.0–0 0–0 9.d4 d5 10.e5=) 5...Nf6 6.Bb5 Bb4 7.Nc3 0–0 8.Na2 Be7 9.Rb1 Nc6 10.Ne2=.

3.e4 Nc6

4.a3 a6 5.f4 (5.Nf3 Nf6=) 5...Nf6 6.d3 e6 7.Nf3 d6 (7...Be7 8.Nc3=) 8.Be2 Be7 9.0–0 0–0 10.Nbd2 Re8 (10...Ng4 11.Qc1=) 11.h3 (11.c4 Ng4 12.Qc1 Ne3+=) 11...Nh5= 12.Nh2 White intends f5 (12.Ne5 Ng3 13.Nc6 Bc6=) 12...Ng3=+ 13.Rf2 Bh4 (13...Bf6 14.c3=+) 14.Nhf3 (14.Bf3!?=) 14...Ne2=+ 15.Re2 e5 (15...Bg3 16.f5=+) 16.f5 (16.fe5 de5 17.Nh4 Qh4=) 16...Bf6 (16...Bg3 17.Nf1 Bf4 18.Ne3=) 17.Nf1 (17.c4 Rb8=) 17...Ne7 (17...d5 18.N1d2=+) 18.g4 (18.Qd2 d5=) 18...g6 (18...Nc6 19.Qd2=+) 19.Qd2 (19.g5 Bh8 20.f6 Nc6=) 19...Bg7 (19...gf5 20.gf5 Nf5 21.N1h2=+) 20.Ng3 gf5 (20...c6 21.d4 Qb6 22.Rf2=) 21.Nf5 (21.gf5 Nc6+=) 21...Nf5= 22.gf5 d5 23.ed5 (23.Rg2!? f6 24.Ne5+=) 23...Qd5=+ 24.Re4 (24.Rf1 Kh8=+) 24...f6 25.Kh2 (25.Qg2 Kh8–/+) 25...Rad8 (25...Qf7!?–/+) 26.Rg1=+ Re7 (26...Kh8 27.Qc3–/+) 27.Qg2 (27.Qh6 Qc6 28.Reg4 Rdd7= (28...Qc2? 29.R1g2 Qg2 30.Rg2 Rd3 31.Qf6+–)) 27...Qa2 28.Bc1? (better 28.Be5!? Be4 29.Bf6 Bf3 30.Qf3 Qc2 31.Rg2 Qd3 32.Qd3 Rd3 33.Be7–/+) 28...Be4–+ 29.de4 Qf7 (29...Kh8 30.Ne1–+) 30.Bh6 (better 30.Ne1–/+) 30...Red7?? (30...Kh8 31.Bg7 Qg7 32.Nd2–+) 31.Kh1?? (better 31.Bg7 Qg7 32.Qf2+–) 31...Kh8–+ 32.Bg7 Qg7 33.Qg7 Rg7 34.Rg7 (34.Rf1 Rd6–+) 34...Kg7 35.Kg1 Rd4 (better 35...Rd1 36.Kf2–+) 36.Kf2?? (better 36.Nd4 ed4 37.Kf2+–) 36...Rc4 (36...Re4 37.Nd2 Rf4 38.Kg3 Rf5 39.Nb3–+) 37.Ne1 Re4 38.Nd3 (38.Ng2 Kh6 39.Kf3 Rc4–+) 38...Rc4 39.Ne1 Rf4 (39...Rf4 40.Kg3 Rf5–+) 0–1. e4_e5_f4 (1700) – Geri1506 (1650), lichess.org, 2021.

4.Bb5 Nb4 5.Bd3 (5.d3 a6 6.Ba4 Rb8+=) 5...c5 (5...Nf6 6.a3 Nd3 7.cd3=+) 6.a3 (6.Nc3 Nd3 7.cd3 e6=) 6...Nc6 (6...Nd3 7.cd3 Qb6 8.Qc2=+) 7.Qg4 (7.Nf3 Rb8+=) 7...f6 (7...Nf6!? 8.Qf4 Nd4=) 8.Qh5+– g6 9.Qc5 e5 10.Qe3 Bh6 11.Qh3 Bc8 12.Qf3 Nd4 (12...Rb8!? 13.Bc3 Qb6+–) 13.Bd4 ed4 14.Ne2 Qa5 (14...Qb6 15.0–0+–) 15.0–0 (better 15.e5 Rb8 16.ef6+–) 15...Bd2?? (better 15...Qe5+–) 16.Nd2 Qd2 17.Nd4 (17.e5 Rb8 18.ef6 Qg5 19.f7 Kf8 20.fg8N Kg8+–) 17...Qc3? (17...Qg5 18.Rab1 Qe5 19.Rfd1+–) 18.Ne2 (better 18.e5 Qd4 19.Qa8+–) 18...Qe5 19.Qe3 Ne7 20.f4 Qh5 (20...Qc7 21.Rab1+–) 21.Ng3 (21.e5 f5+–) 21...Qa5 22.e5 Qb6 (22...fe5 23.Qe5 Qe5 24.fe5+–) 23.Qb6 ab6 24.ef6 Nd5 25.Rfe1 (better 25.Rae1 Kd8 26.Be4+–) 25...Kf7 (25...Kd8 26.Be4 Ra5 27.Bd5 Rd5 28.Rab1+–) 26.Ne4 (better 26.Bc4 Ra5 27.Rad1 Kf6 28.Bd5 Ra3 29.Ne4 Kg7 30.Nd6+–) 26...Nf6 (26...Nf4 27.Nd6 Kf6 28.Rf1+–) 27.Ng5 (27.Nd6 Kf8+–) 27...Kg7? (better 27...Kf8+–) 28.Re7 Kf8 (28...Kg8 29.Rae1 d5+–) 29.Rf7 Ke8 (29...Kg8 30.Rf6 d5 31.Re1+–) 30.Re1 (30.Rf6!? Kd8 31.Rg6 hg6 32.Nf7 Kc7 33.Nh8 g5 34.fg5 d5+–) 30...Kd8 31.Rf6 Kc7 32.Nf7 (better 32.Re7!? Ra3 33.Nh7 b5+–) 32...Rf8 33.f5 Bb7 34.fg6 hg6 35.Bg6 Rg8 (35...Ra3 36.Kf2+–) 36.Ref1 (better 36.Re3!? Rae8 37.Re8 Re8+–) 36...Ra3 37.Ne5 (37.Nd6 Bc6+–) 37...Rc3 38.Rf7 Bc6 39.Nc6 Rg6 (39...Rg6 40.Nd4 Rc5+–). Kabatana_Michael (1700) – PapaWasiy55 (1630), lichess.org, 2018.

3.e4 Be4

4.Nc3 Bb7 5.Nb5 e6 6.a3 a5 7.ba5 Ra5 8.Nf3 Nf6 9.Be5 Na6 10.d4=.

4.Nc3 Bc6 5.Nb5 a6 6.Nd4+= e6 7.Nc6 Nc6 8.a3 d6 9.Nf3 d5 10.Be2 Nf6 11.c4 Ne4 (better is 11...Qd7!?+/–) 12.Qa4+– Qd6? (better is 12...Qd7 13.cd5 Nd8 14.Qd7 Kd7+–) 13.Ne5 dc4 14.Qc6 Qc6 15.Nc6 Nd6 16.Rc1 f6 17.Bc4 Nc4 18.Rc4 Bd6 19.0–0 0–0 20.d4 h6 21.Re1 Rfe8 22.h3 Kh7 (22...Kf7 23.Kf1+–) 23.Bc1 f5 (23...g5 24.Rc3+–) 24.Rc2 f4 (24...Kg6 25.Rce2+–) 25.Rce2 h5 (25...Rf8 26.Re6 Rf5 27.Ne5+–) 26.Re6 (26.d5 g5+–) 26...Re6 27.Re6 Rf8 28.Ne5 Be5 (28...Rf5 29.Nc4+–) 29.de5 (29.de5 Ra8 30.Bf4+–) 1–0. Kuhlmann,Antonius Egidius – Falke,K, CiF, 1988.

4.Nc3 Bc6 5.Nb5 Nf6 6.Nd4 Be4 7.Ngf3 e6 8.b5 a6 9.Be2 ab5 10.Nb5=.

4.Nc3 Bc6 5.Nb5 Nf6 6.Nf3=.

4.Nf3 a6=+ 5.a4 e6 (5...ba4 6.Ra4 e6 7.Nc3=+) 6.ab5= ab5 (6...Bb4?? 7.Bg7 (7.ba6?! Nf6+=) 7...ab5 8.Ra8 Ba8 9.Bh8+–) 7.Ra8 Ba8 8.Bb5 Nf6 9.Bc3 (9.c3 Nh5=) 9...Be7 (9...Nd5 10.0–0=+) 10.0–0= 0–0 11.d3 (11.Be2 Ne4=) 11...Nc6 (11...Nd5 12.Bd2–/+) 12.Qd2 (12.Bf6!? Bf6 13.c3=) 12...Nd5 13.Bc6 White gets the initiative 13...Bc6 14.Na3? (14.Nd4 Bb7=+) 14...Qb8 (better 14...Nc3!? 15.Qc3 Bf3 16.gf3 Bd6–+) 15.b5–/+ Ba3 (15...Bb5!? 16.Nb5 Qb5 17.Bg7 Kg7–/+) 16.bc6= Nc3 17.Qc3 Bb4 (17...Bb2 18.Qc5 d6 19.Qa5=) 18.Qb3 d6?? (better 18...Bd6 19.Qb8 Rb8 20.cd7 Rd8=) 19.Rb1+– (19.Rb1 Qa8 20.Qb4 Qc6 21.c4+–) 1–0. kianas (2055) – retiponziani (1930), ChessWorld.net, 2012.

3.f3 a5

4.ba5 Ra5 5.Bc3 Ra6 (5...Ra8 6.e4 Bc6 7.Qc1=) 6.e3 c6 7.Bd3 (7.d4 d5=) 7...d5 8.Ne2 c5?? (8...Nd7 9.0–0=+) 9.a3?? (better is 9.Bb5 Nc6 10.Ba6 Ba6 11.d3+–) 9...c4 10.Bf5 e6 11.Bh3 Bd6?? (11...Qh4 12.Ng3–/+) 12.Nd4 (better is 12.Bg7 Qh4 13.Kf1+–) 12...Rb6?? (better is 12...b4!? 13.ab4 Qh4 14.Kf1 Ra1 15.Ba1 Nf6= (15...Bb4? 16.Nf5 ef5 17.Bg7+–)) 13.Ba5 (better is 13.Ne6 fe6 14.Bg7+–) 13...Qh4= 14.Ke2 Ra6 (14...Rc6 15.Nc3 (< 15.Nc6 Nc6 16.Bb4 Nb4 17.ab4 Bb4=) 15...Be5 16.Ncb5 Bd4 17.ed4+/–) 15.Nb5 Be5 (15...Qe7 16.Bc3 Nf6 17.Kf2=) 16.Nc7 (better is 16.Bc3 Bc3 17.N1c3+=) 16...Kd7?? (better is 16...Bc7 17.Bc7 Nd7=) 17.Na6+– Ba6 18.c3 Nf6 19.Qa4 Nc6+/– 20.Bb6 Ra8 21.Bc5 Nh5 22.g3?? Bg3 23.d3?? Qh3 24.Nd2 Qg2 25.Kd1 Qh1 26.Kc2 Qa1 27.Nb1 cd3 28.Kc1 d2! 29.Kd2 Qb1 30.hg3 Qd3 (31.Kc1 Ng3–+; 30...Ng3 31.Qa6 Ra6 32.e4 Ne5 33.Ke3 Qd3 34.Kf2 Qf3 35.Kg1 Ne2 36.Kh2 Ng4) 0–1. Gregor123 – dz@, mySchach.de, 2005.

4.e4=.

3.Nf3 a5

4.a3 a4?? 5.e3 c6 6.c4 Ba6 (6...bc4 7.Bc4 d5 8.Bd3+/–) 7.c5 (better is 7.cb5!? cb5 8.Nc3+–) 7...d6+/– 8.d4 dc5 9.dc5 Nf6 (9...Qd1!? 10.Kd1 Nf6+/–) 10.Qd8 Kd8 11.Bd3 Nbd7 12.Nbd2 g6 13.Rd1 Bg7 14.Ne4 Kc7 15.Nf6 Bf6 16.Bf6 ef6 17.0–0 Ne5 18.Ne5 fe5 19.Rd2 f5 20.e4 f4 21.Bb1 Bc8 22.Ba2 Bd7 23.Rfd1 Rad8 24.f3 g5 25.h3 h5 26.Rd6 g4 27.hg4 hg4= 28.Rg6 g3 29.Rdd6 Rhe8 30.Rh6 Re7 31.Kf1 Be8 32.Rd8 Kd8 33.Rd6 Kc7 34.Be6 Bd7 35.Bd7 Rd7 36.Rd7 Kd7 37.Ke2 Ke6 38.Kf1 ½–½. kansasjayhawk – spensley, Gameknot.com, 2013.

4.a3 ab4 5.ab4 Ra1 6.Ba1=.

4.a3 e6 5.e3 ab4 (5...c6 6.a4=) 6.ab4 (6.Bb5 Ra5 7.Be2 Nf6+=) 6...Ra1= (6...Bb4? 7.Ra8 Ba8 8.Bg7+– (8.Bb5?! Nf6=)) 7.Ba1 c6 8.Bd3 Na6 9.c3 Nf6 10.0–0 Bd6 11.Na3 Bb8 12.Bb1 d5 13.d4 Ng4 14.e4 de4=+ 15.Be4 Nh2 16.Re1 Nf3 17.Qf3 Qb6 18.c4 bc4 19.b5= Nb4 20.Rb1 Nd5=+ 21.Nc4 Qc7 22.bc6 Bc6 23.Ne5= f5 24.Nc6 Qh2? 25.Kf1+– 0–0? 26.Qh3 fe4 27.Rb8?? Qd6= 28.Rf8 Kf8 29.Qh7 Qc6 30.Qh8 Kf7 31.Qh5 g6 32.Qd1 e3=+ 33.g3 Qa6–/+ 34.Ke1 Qa2 35.fe3=+ Qg2 36.Qf3?? Kg7 37.Qg2+– (37...Ne3 38.Qe4+–) 1–0. Forman,Stepan – Koper,Stefan (2015), CZE Czechia–ch, 1995.

3.Nf3 a6

(--> 2.Bb2 a6 3.Nf3 Bb7).

4.e3 (--> 2.Bb2 Bb7 3.e3 a6 4.Nf3).

3.Nf3 Nc6

4.a3 f6 5.e3 e5 (5...a5 6.Bb5 ab4 7.Bc6 Bc6 8.ab4 Ra1 9.Ba1+=) 6.Be2 (6.Bb5 a5 7.ba5 Ra5+–) 6...d5 (6...a5 7.Bb5 ab4 8.0–0=) 7.0–0 (7.Bb5 a5+–) 7...Nge7 (7...a6 8.d3+=) 8.d3 (8.Bb5!? a5 9.ba5+–) 8...Nf5 (8...a5 9.Nc3=) 9.Nbd2 (9.c4 dc4 10.dc4 Qd1 11.Rd1 bc4 12.Bc4 Nd6+=) 9...Nd6 (9...a5 10.a4 ab4 11.ab5+=) 10.Rc1 (10.c4 e4 11.de4 dc4+=) 10...Be7 (10...a5!? 11.c3 Be7=) 11.c4+= bc4 12.dc4 dc4 13.Nc4 Nc4 14.Rc4 (better 14.Bc4 Qd1 15.Rfd1+–) 14...0–0? (better 14...Qd1 15.Bd1 0–0–0+=) 15.Qc2+– Bd6 (15...Qe8 16.Bd3 g6 17.Be4+–) 16.Rc6 Bc6 17.Qc6 a5 18.b5 Re8 (18...Qe7 19.a4+–) 19.Nh4 g6 (19...Kh8 20.Rd1+–) 20.Nf3 (20.Bf3 Rb8+–) 20...Qe7 21.a4 e4 (21...Kg7 22.Rc1+–) 22.Nd2 (better 22.Bc4 Kh8 23.Qe4+–) 22...Bb4 (22...Kg7 23.Nc4+–) 23.Nb3 (23.Bc4 Kf8 24.Ne4 f5+–) 23...Rad8 (23...Kg7 24.Rc1+–) 24.Nd4 (better 24.Bf6 Qd7 25.Qc4 Kf8 26.Bd8 Qd8 27.Rc1+–) 24...Bc5 (24...Kf8 25.Rc1+–) 25.Rd1 (better 25.Bc4 Kg7 26.Ne6 Kh6 27.Qe4+–) 25...Rd7 (25...Kg7 26.Rc1 Bb6 27.Qc2+–) 26.Rc1 Bb4 (26...Bd6 27.Ne6! Bh2 28.Kh2+–) 27.h3 (27.Bc4 Kg7 28.Ne6 Kh8 29.Bf6 Qf6 30.Qd7 Rb8+–) 27...Red8 (27...Kf8 28.Bd1+–) 28.Bg4 (28.Bc4!? Kg7 29.Ne6 Kh6 30.Qe4 Rd1 31.Rd1 Rd1 32.Kh2 g5+–) 28...f5 29.Be2 (better 29.Bd1 Kf8 30.Ne6 Qe6 31.Qe6 Rd1 32.Rd1 Rd1 33.Kh2+–) 29...f4 (29...Qd6 30.Qc4 Rf7+–) 30.Bc4 Kf8 31.Ne6 Ke8 32.Nd8 Qd8 33.Qe6 (33.Be6 Bd6 34.Rc4 fe3 35.Bd7 Qd7 36.Re4 Be7 37.Qa8 Qd8 38.Re7 Ke7 39.Bf6 Kf6 40.Qd8 Kf5 41.fe3 g5+–) 33...Re7 (33...Qe7 34.Qa6 Kf8 35.ef4+–) 34.Qg8 Kd7 35.Qd8 (35.Rd1 Bd6 36.Qd5 Re8+–) 35...Kd8 36.Rd1 (better 36.Bf6!? Ke8 37.Be7 Ke7 38.ef4 Bd2+–) 36...Ke8 (36...Rd7 37.Bf6 Ke8 38.Rd4 Rd4 39.Bd4 fe3 40.fe3+–) 37.b6 (37.Bd5 fe3 38.fe3 h5+–) 37...cb6 38.Bb5 (better 38.Bf6 fe3 39.fe3+–) 38...Kf8 (38...Kf7 39.ef4 Rc7 40.Bd4+–) 39.Bf6 (better 39.Rd8 Kf7 40.Bc4 Re6 41.Rd7 Be7 42.Rc7 fe3 43.fe3+–) 39...Rc7 40.Be5 Rc2 41.Bf4 Re2 (41...Be7 42.Rd4+–) 42.Bg3 (better 42.Be2 Be7 43.Bh6 Ke8 44.Rd4+–) 42...Re1 (42...Rc2 43.Rd4+–) 43.Re1 Be1 44.Kf1 (44.Bc7!? Ke7+–) 44...Bb4 45.Ke2 Ke7 46.f3 (better 46.Bc7!? Bc5+–) 46...ef3 47.gf3 Bc5 48.Kd3 Ke6 49.e4 h6 50.h4 g5 (50...Kf7 51.e5+–) 51.hg5 hg5 52.Bc4 (52.Bc7 Kf7+–) 52...Kf6 53.Bd5 (53.e5 Ke7+–) 53...Bg1 (53...Ke7 54.e5+–) 54.Bc7 (better 54.e5 Ke7+–) 54...Bc5 (54...Ke7 55.Bc6 Bc5 56.Kc4+–) 55.e5 Ke7 56.Be4 (better 56.e6!? Ke8+–) 56...Kf7 (56...Kd7 57.Bb8 Kc8 58.Ba7+–) 57.Kc4 Ke7 (57...Ke6+–) 58.Kd5 Ke8 59.Bb8 (59.Bd6 Bd6 60.Kd6 Kf7 61.e6 Kg8 62.e7 Kf7 63.Kd7 Kg8 64.e8Q Kg7 65.Ke7 b5 66.Qf8) 59...Ke7 (59...Be7 60.Bd6 Kf7 61.Kc6+–) 60.Kc6 (60.Bd6 Bd6 61.ed6 Kd8+–) 60...Ke8 (60...Bd4 61.Bd6 Ke6 62.Bd5 Kf5 63.e6+–) 61.e6 (better 61.Bd6 Kf7 62.Bd5 Kg7 63.e6 Bb4 64.e7 b5 65.e8Q Bd6 66.Qf7 Kh6 67.Be4 g4 68.Qg6) 61...Ke7 62.Kd5 Kd8 (62...Ba3 63.Bc7 Bc5 64.Bf5+–) 63.Bf5 (63.Bd6 Bf2 64.e7 Kd7 65.Bf5 Ke8 66.Bg6 Kd7 67.e8Q) 63...Ke7+– 64.Bg3 g4 (64...Bb4+–) 65.fg4 Ke8 66.g5 Ke7 (66...Bb4 67.Bd6 Bd2 68.Bg6 Kd8 69.e7 Kc8 70.Kc6 Bg5 71.Bf5) 67.g6 (67.Be5 Kf8 68.g6 Ba3 69.g7 Kg8 70.Bg6 Be7 71.Bf7 Kh7 72.g8Q Kh6 73.Qg6) 67...Kf8 68.g7! Kg8 (68...Kg7 69.Be5 Combination) 69.e7! Kg7 (69...Be7 70.Be5 Mate attack) 70.e8Q Kh6 (70...Kf6 71.Be5 Kg5 72.Qg6 Kh4 73.Qg4) 71.Qe6 (71.Qg6) 71...Kg5 (71...Kg7 72.Be5 Kf8 73.Bg6 b5 74.Qf7) 72.Qg6 1–0. e4_e5_f4 (1710) – Ewely (1715), lichess.org, 2021.

4.e3 a6 5.a3 d6 6.c4 bc4 7.Bc4 e6 (7...e5 8.Nc3+/–) 8.0–0 Nf6 9.d4 Be7 (9...d5 10.Bd3+/–) 10.Nc3 0–0 11.d5 (11.Rc1 Qd7+/–) 11...ed5 12.Nd5 Nd5 (12...Ne5 13.Ne5 de5 14.Nf6 Bf6 15.Qg4+/–) 13.Bd5 Bf6? (better is 13...Qc8!?+/–) 14.Bf6+– Qf6 15.Rc1 Nb4?? (15...Nd8 16.Rc7 Bd5 17.Qd5 Ne6+–) 16.Bb7 Rab8 17.Rc7 (better is 17.Be4 Na2 18.Rc7 Nc3 19.Bh7 Kh8+–) 17...Na2 (17...Qd8 18.Rc8 (18.ab4?! Qc7 19.Ba6 Rb4+–) 18...Rc8 19.Bc8 (19.ab4?! Rb8 20.Ba6 Rb4+–) 19...Qc8 20.ab4+–) 18.Qc2 (better is 18.Qd3 Nc3 19.Qa6 d5 20.Qf6 gf6+–) 18...Nc3 19.Ba6 (19...Nd5 20.Ra7+–) 1–0. Wall,Bill – MyGame, Internet, 2006.

3.Nf3 d6

4.e3 e5 5.Bb5 c6 6.Be2 Nd7 7.c4 h6 8.0–0 Ngf6 9.d3 Be7 10.Nc3 0–0 11.Qc2 a6 12.a4 White intends b5 12...Re8 13.Rfb1 Bf8 14.h3 Rb8 15.b5 ab5 16.ab5 c5 17.e4 Nb6 18.Na4 Be7 19.Nb6 Qb6 20.Bc3 Ra8 21.Ra8 (better 21.Qd2!?+–) 21...Ra8+– 22.Ra1 Nh5? (better 22...Ra1!? 23.Ba1 Bc8+–) 23.Ra8+– Ba8 24.Qa2 Bb7 25.Qa5 (25.Ne5!? Nf4 26.Nf3 d5 27.ed5 Qg6+–) 25...Bd8 (25...Qa5!? 26.Ba5 Nf4 27.Kf1+–) 26.Qb6 ½–½. mrchessplayer – grahamtrue, net–chess.com, 2020.

3.Nf3 e6

4.a3 a5!?= A) 5.ba5 Ra5 (5...Nf6 6.Bc3 Bd5 7.e3 c6 8.d3 Bf3 9.Qf3 Nd5 10.Bd2 Na6+=) 6.e3 Nf6 7.Nd4 c6 8.Nc3 d5 9.Nb3 Ra8 10.a4 b4=; B) 5.Nd4 ab4 (5...e5 6.Nb5 c6 7.N5c3 ab4 8.ab4 Ra1 9.Ba1 Bb4 10.Na2 Bd6=) 6.Nb5 Nf6 7.ab4 Ra1 8.Ba1 c6 9.N5c3 Bb4 10.e4 d6=; C) 5.e3 ab4 (5...c6 6.ba5 Ra5 7.c4 Nf6 8.Qb3 Qb6 9.Bd4 c5 10.Bf6 gf6+=) 6.Bb5 Nf6 7.0–0 Be7 8.ab4 Ra1 9.Ba1 Bb4 10.Ne5 0–0=.

4.a3 a6 A) 5.Nc3 Nf6 (5...c5 6.bc5 Bc5 7.Ne4 Be4 8.Bg7 Bf3 9.ef3 Bd4 10.Bd4 Nf6+/–) 6.e3 c5 7.bc5 Bc5 8.d4 Be7 9.Bd3 0–0 10.0–0 d5=; B) 5.e3 d5 (5...Nf6 6.c4 bc4 7.Bc4 d5 8.Be2 c5 9.bc5 Bc5 10.Nc3 0–0=) 6.Be2 Nf6 7.0–0 Bd6 8.a4 ba4 9.c3 Bc6 10.Na3 0–0=; C) 5.d4 a5 (5...Nf6 6.e3 Be7 7.c4 bc4 8.Bc4 0–0 9.0–0 Re8 10.Nc3 Nd5+=) 6.e3 c6 7.ba5 Qa5 8.Bc3 Qa4 9.Bd3 Nf6 10.0–0 Be7=.

4.a3 Bd6?? 5.e3 (better is 5.Bg7 Bf3 6.ef3+– (6.Bh8?! Bc6+–)) 5...Nf6+/– 6.Bb5 0–0 7.Be2 e5 8.c4 e4 9.Nd4 Be5 10.Qc2 d6 11.Nf5 Qd7 12.Nc3?? (better is 12.Ng3 Bb2 13.Qb2+/–) 12...Qf5–+ 13.f3 Rd8 (better is 13...Qg5!? 14.0–0 ef3 15.Bf3–+) 14.fe4 Ne4 15.Nd5? (better is 15.Bf3 Bc3 16.Bc3–+) 15...Qf2 16.Kd1 Qg2 17.Rf1 Qh2 (better is 17...Bd5 18.cd5 Bb2 19.Qb2 Qh2–+) 18.Qe4–/+ Nd7 (18...Bb2!? 19.Rb1 c6 (worse is 19...Ba3 20.Ne7 Kf8 21.Qb7+/–) 20.Ne7 Kf8 21.Rb2 Qe5 22.Qe5 de5–/+) 19.Ne7 Kf8 20.Qb7 Ke7 (20...Bb2 21.Ra2 Ke7 22.Rb2=) 21.Be5 de5 22.Qc7 Rdc8 23.Qa5 Qg2 24.Qd5 Qd5+= 25.Rf7?? Qf7–+ 26.c5 Qb3 27.Ke1 Qb2 28.Rd1 Qa3 29.Bf3 Rab8 30.d3 Qb4 31.Ke2 Rc5 32.d4 Qb2 33.Rd2 Rc2 (33...Rc2 34.Bh1 Rf8 35.Rc2 Qc2 36.Ke1 Rf2 37.de5 Qd2) 0–1. keeder – gordiemac, ChessWorld.net, 2011.

4.a3 Nf6 A) 5.e4 a6 (5...Be4 6.Bb5 c6 7.Be2 a5 8.b5 d5 9.Nc3 Bf3 10.Bf3 Bd6=) 6.e5 Nd5 7.d3 a5 8.c4 Nf4 9.Bc1 Ng6 10.cb5 ab4=; B) 5.Nc3 a6 (5...a5 6.Nb5 c6 7.Bf6 gf6 8.Nbd4 ab4 9.ab4 Ra1 10.Qa1 Bb4=) 6.e3 c5 7.bc5 Bc5 8.Be2 0–0 9.0–0 Nc6 10.d4 Be7=; C) 5.e3 c6 (5...a6 6.c4 bc4 7.Bc4 d5 8.Be2 c5 9.bc5 Bc5 10.Nc3 0–0=) 6.c4 bc4 7.Bc4 d5 8.Be2 a5 9.ba5 Bd6 10.Be5 c5=.

4.a4 A) 4...ba4 A1) 5.Ra4 Nf6 (5...Bc6 6.Ra1 Nf6 7.c3 Be7 8.e3 0–0 9.Be2 Bf3 10.Bf3 d5=) 6.Nc3 Na6 7.Ba3 c5 8.b5 Nb4 9.Bb2 a6 10.e3 ab5=; A2) 5.Bc3 Ne7 (5...Nf6 6.e3 c5 7.b5 a6 8.Ra4 Bd6 9.d4 0–0 10.Bd3 ab5=) 6.Ra4 Bc6 7.Ra5 Nd5 8.b5 Nc3 9.Nc3 Bb4 10.Ra2 Bb7+=; A3) 5.e3 a3 (5...Nf6 6.Ra4 Nd5 7.c3 Bd6 8.d4 Nb6 9.Ra1 0–0 10.Bd3 f5+=) 6.Ra3 Nf6 7.Ra4 Nd5 8.c3 Bd6 9.d4 0–0 10.Nbd2 Nb6=; B) 4...Nf6 B1) 5.ab5 Bb4 6.e3 a6 7.Ra4 Bc5 8.d4 Be7 9.ba6 Na6 10.Bb5 Nb4=; B2) 5.c3 ba4 (5...a5 6.ab5 ab4 7.Ra8 Ba8 8.e3 Bd6 9.Be2 0–0 10.cb4 Qe7=) 6.Qa4 c5 7.e3 a6 8.Be2 cb4 9.cb4 Nd5 10.0–0 Bc6+=; B3) 5.e3 Bb4 6.ab5 a6 7.Ra4 Bc5 8.d4 Be7 9.Nbd2 0–0 10.Qa1 Nd5=.

4.d4 Bb4 5.c3 Be7 –/+.

4.d4 Nf6 5.Nc3? (5.a3 a5 6.ba5 Ra5=) 5...a6 (better 5...Bb4!? 6.Qd3 a6–/+) 6.a3= d6 7.Qd3 Be7 8.e4 0–0 9.Be2 c5 10.0–0 c4 11.Qe3 Nbd7 12.e5 (12.Nd2 Qb6=) 12...de5 (12...Nd5 13.Nd5 Bd5 14.Rfe1=+) 13.de5 White gets strong play along the open d–file 13...Nd5 14.Qd2 Nc3 15.Bc3 Nb6 16.Rfd1 Nd5 17.h3 (17.Qe1 Qc7=+) 17...Nc3 18.Qc3 White is in command 18...Qc7 19.Rd4 (19.Nd2 a5=+) 19...a5–/+ 20.Rad1 ab4 21.ab4 Ra4?? (better 21...Bd5–/+) 22.Rd7+– Qc6 (22...Bb4 23.Rc7 Bc3 24.Rb7+–) 23.Re7 Rfa8 (23...Re8 24.Red7+–) 24.Rd6 (better 24.Rdd7 Qe4 25.Rb7 Qe2 26.Rf7 Kh8+–) 24...Ra1 (24...Qe4+–) 25.Kh2 Qe4 (25...Qc8 26.Rb7! Qb7 27.Qa1 h6+– (27...Ra1?? 28.Rd8)) 26.Red7 (better 26.Qa1! h6 27.Qd4+–) 26...h6 27.Qd2 Bd5 28.Rd8 Rd8 29.Rd8 Kh7 30.Rb8 Bc6 (30...Ra2 31.Bd1 Qg6+–) 31.Rd8 (better 31.Qd8!? Qe2 32.Qg8 Kg6+–) 31...Ra2?? (31...Bd5 32.c3 Qb1+–) 32.Bd1+– Qf5 (32...Qg6 33.Rb8 Bd5 34.Rb5+–) 33.Qd6 (better 33.Qe3 Qg6+–) 33...Bf3 34.gf3 Qf4 35.Kg2 Qg5 36.Kf1 Ra1 37.Qd4 Rb1 38.c3 Qh5 (38...Qf5 39.Kg2+–) 39.Qe4 g6 (39...Qg6 40.Ke2 Qe4 41.fe4 Kg6+–) 40.Qb1 Qh3 (40...Qe5 41.Rd7 Kg7 42.Qe4+–) 41.Ke2 Qh4 42.Rd4 (42.Rb8 Qg5 43.Qe4 Kg7+–) 42...Qg5 (42...Qe7 43.Qe4 Qc7 44.Qe3+–) 43.Bc2 (better 43.Qe4 Kg7+–) 43...Qe5 44.Kf1 (44.Be4 Qc7+–) 44...Qh5 45.Rg4 (45.Rd7 Kg8+–) 45...Qh3 (45...f5 46.Rg3 Qh1 47.Ke2 Qb1 48.Bb1+–) 46.Ke2 f5 (46...Qh5 47.Qc1 Qe5 48.Qe3+–) 47.Rg3 (47.Rd4 Kg7+–) 47...Qh5 (47...Qh4 48.Qd1 Qe7 49.f4+–) 48.Qf1 (better 48.Qd1!? Kg7+–) 48...g5 49.Rh3 Qe8 50.Qg2 Qc6 (50...Qe7+–) 51.Qg5 (51.Qg5 e5 52.Bf5 Kh8 53.Rh6 Qh6 54.Qh6 Kg8 55.Be6) 1–0. Bopeep (1845) – retiponziani (1945), ChessWorld.net, 2012.

4.e3 (--> 3.e3 e6 4.Nf3).

4.e3 a6 (--> 3.e3 a6 4.Nf3 e6).

4.e3 Nf6 5.a3 a6 6.c4 bc4 7.Bc4 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

4.g3 Bb4?? 5.Bg7 e5 6.Bh8+–.

3.Nf3 Bf3

4.ef3 e6 5.a3 a6 6.c4 bc4 7.Bc4 Qg5 8.0–0 Bd6 9.d3 (9.g3 Nf6+/–) 9...Qh5 10.h3 Qg5 (10...Nf6 11.Nd2+=) 11.Nd2 Qf4 12.g3 Qg5 (12...Qh6 13.Ne4+/–) 13.h4 (13.Ne4 Qg6 14.d4+–) 13...Qf5? (better is 13...Qg6+/–) 14.Bg7+– Ne7 (14...Be5 15.Bh8 Bh8+–) 15.Bh8 Nbc6 (15...Ng6 16.Bc3 Nh4 17.Ne4+– (17.gh4?! Qh3 18.f4 Bf4=)) 16.Ne4 (16.f4 Bf4 17.Nf3 Ng6+–) 16...Ne5 (16...Be5 17.Be5 Ne5 18.Nd2+–) 17.Nd6 cd6 18.Be5 Qe5 (18...de5 19.d4 h6 20.Bd3+–) 19.f4 (19.d4 Qf6 20.d5 Qc3+–) 19...Qg7 20.Rc1 d5 21.Bb3 Nc6 (21...a5 22.b5+–) 22.Re1 Nd4 (22...Kd8 23.Qc2 Qd4 24.Ba4+–) 23.Bd5 Rb8 24.Bc4 (24.Qa4 Qg4 25.Rc4 Nf3 26.Bf3 Qf3 27.Qa6 Ke7+–) 24...Nf5 (24...Rb6 25.Kg2 Ke7 26.Qh5+–) 25.Ba6 Nh4 (25...Ng3 26.fg3 Qg3 27.Kf1+–) 26.Rc8 (better is 26.Qh5 Ng6 27.f5 Nf8+–) 26...Rc8 27.Bc8 Kd8 28.Ba6 Nf5 29.Qc2 Nh4 30.Re3 Nf5 31.Qc8 Ke7 32.Qc5 Ke8 33.Qf5 Kf8 34.Qc5 Kg8 35.Qc8 Qf8 36.Qf8 Kf8 37.Re4 d5 38.Re1 Ke7 39.Rc1 Kd6 40.b5 f5 41.b6 (41.b6 Kd7 42.b7 e5 43.b8Q ef4 44.Qc7 Ke8 45.Qh7 fg3 46.Rc8 1–0. madik – greywolf_b, Gameknot.com, 2008.

4.ef3 Nf6 5.Be2 c6 6.0–0 g6 (6...e6 7.a4=) 7.c4 (7.a4 ba4 8.Bf6 ef6+=) 7...Bg7 (7...bc4!? 8.Bc4 Bg7=) 8.cb5+– cb5 9.Bb5 0–0 10.d3 (10.Qa4 d5+–) 10...a6 11.Bc4 (11.Ba4 Nd5 12.Bg7 Kg7+–) 11...d5+= 12.Bb3 e6 13.a3 Nc6 14.Nc3 Rb8 15.Ba4 Nd4 16.Ne2 Nb5 17.Bb5 ab5 18.Qb3 Qb6 (18...Qd6 19.f4 Ra8 20.Be5+–) 19.Bd4+– Qa6 20.Rfc1 Rfc8 21.Bc5 (21.Qb2 Ne8+–) 21...Nd7+= 22.d4 Nc5 (22...Nb6 23.Nc3+=) 23.bc5 Rc6 (23...b4!? 24.Ra2 ba3 25.Qa3 Qa3 26.Ra3 Rb4+=) 24.Qb4+– Qa4 25.Rd1 Ra8 26.Qc3 (26.Rdb1 Rca6 27.h3 e5 28.Qa4 Ra4+–) 26...Qc4 27.Qc4 (better 27.Qe3!?+–) 27...bc4= 28.Nc3 f5 (28...Ra5 29.a4=) 29.Kf1 Rca6 (29...Ra5 30.a4=) 30.Nb5 Rb8 31.a4 Kf7 32.Ke2 (32.f4 Bh6+–) 32...Ke7 (32...f4+=) 33.Ke3 (33.f4 Kd7+–) 33...Ra5 (better 33...e5!?=) 34.f4+= Kd7 35.g3 Kc6 36.h3 Rba8 37.Nc3 h6 (37...g5 38.Rdb1 (worse 38.fg5 e5 39.Ne2 Re8=+) 38...gf4 39.gf4+–) 38.Rdb1 R8a6 (better 38...Kc7+–) 39.Nb5?? (better 39.Rb8+–) 39...Ra4=+ 40.Ra4 Ra4 41.Nd6?? (better 41.Nc3 Ra6 42.h4=+) 41...Ra3–+ 42.Ke2 Bd4 43.Rb6 (43.Nb7–+) 43...Kc7 (43...Kc5 44.Nc8 Ra2 45.Kd1 c3 46.Re6 c2 47.Kc1 Kc4 48.Nb6 Kd3 49.Re3 Be3 50.fe3 Ra1 51.Kb2 c1Q 52.Kb3 Qc3) 44.Rb7?? (better 44.Nb5 Kd8 45.Nd4 (45.Na3?! Bc5 46.Ra6 Kd7+–) 45...Ra2 46.Kf3 Ra3 47.Kg2+–) 44...Kc6= 45.Rb6 Kc5 46.Nc8 Ra2 47.Kd1 Bf2 (47...c3 48.Re6 c2 49.Kc1–+) 48.Re6 Bg3 (48...d4 49.Re5 Kb4 50.Nb6–+) 49.Rg6 (49.Ne7 Ra1 50.Kc2 Bf4 51.Ng6 Bd6–+) 49...Bf4 50.Rf6 (50.Ne7 d4 51.Rc6 Kb5–+) 50...Ra1 (50...c3 51.Ra6 c2 52.Ke2 Ra6 53.Kf3 c1Q 54.Kg2 Qd2 55.Kf3 Ra3) 51.Kc2 (51.Ke2 Bg5 52.Rf7 Ra2 53.Kf3 c3 54.Rc7 Kd4–+) 51…Rh1 (51...Rh1 52.Rf5 Be3–+) 0–1. e4_e5_f4 (1675) – Busti78 (1725), lichess.org, 2020.

3.Nf3 f6

4.Nc3 c6 (4...a5 5.a3 ab4 6.ab4 (worse is 6.Nb5 c6–/+) 6...Ra1 7.Qa1=) 5.d4 (5.e4 a5 6.ba5 Ra5+=) 5...d5 6.e4 e6 7.ed5 ed5 8.Bd3 (8.a3 a5 9.ba5 Ra5+=) 8...Bb4+= 9.0–0 Ne7 10.Ne2 g6 (10...Bc8 11.a4=) 11.c3 Ba5 12.Nf4 (12.a4 a6=) 12...Qd7 (12...Qd6 13.Ne2=) 13.Re1 g5? (better is 13...0–0!?=) 14.Ne6 (better is 14.Ba3 b4 15.cb4+–) 14...Kf7?? (better is 14...Qd6 15.Qb3 Bc8+–) 15.Nc5 (better is 15.Nfg5 Kg8 16.Bh7 Rh7 17.Nh7+–) 15...Qc7 16.Qe2 Re8?? 17.Qe6 Kg7 18.Qh3 h6 19.Ne6 Kf7 20.Nc7 Bc7 21.Qh6 Rg8 22.Qh7 Kf8 23.Qe7 1–0. Mr.Oldenslo – Jaime532133, ChessWorld.net, 2010.

4.e3 g6 (4...a6 5.a4 e5 6.c3 ba4 7.Qa4=) 5.c4 (5.Bb5 e5+/–) 5...a6 (5...e5!?+=) 6.cb5+/– ab5 (6...Bg7 7.d4+/–) 7.Bb5 c6 (7...Nc6 8.a3+–) 8.Bc4 (8.Be2 Qb6 9.Bc3 Na6+–) 8...Bg7 (8...d5 9.Be2+/–) 9.0–0+– Nh6 (9...d5 10.Be2+–) 10.Nd4 (10.a4 d5 11.Be2 0–0+–) 10...d5 (10...Na6 11.a3+/–) 11.Bd3 (11.Ne6 Qd6 12.Ng7 Kf7+–) 11...e5 (11...Qd6 12.a3+/–) 12.Nb3 (12.Ne6 Qe7 13.Ng7 Qg7+–) 12...e4 (12...Qb6 13.a3+/–) 13.Be2 0–0 (13...Ba6 14.d3+/–) 14.Nc5 (14.d3 ed3 15.Bd3 Nd7+–) 14...Qe7+/– 15.Nb7 (15.a3 Na6 16.Nb7 Qb7+–) 15...Qb7 16.a3 (16.Bc3 f5+/–) 16...Nd7 (16...f5 17.Bg7 Qg7 18.Nc3+/–) 17.Bd4 (17.d3 f5 18.Bg7 Kg7+–) 17...f5 (17...Nf5 18.Bc3 Ne5+/–) 18.Nc3 (18.Bg7!? Kg7 19.d3+/–) 18...Bd4+= 19.ed4 Nf7 (19...Qb6!?+=) 20.d3+/– Rae8 (20...Nd6 21.Qd2+/–) 21.de4 (21.Qd2 Nd6+/–) 21...fe4 22.Bg4 (22.Qd2 Nd6+/–) 22...Nf6 (22...Nb6 23.Na4 Na4 24.Qa4+/–) 23.h3 (23.Na4 Nd6+/–) 23...Ng5 (23...Ng4 24.Qg4 Nd6 25.Ne2+=) 24.Na4 (24.Qd2 Nf7+/–) 24...Kg7 (24...Ng4 25.Qg4 Ne6 26.Nc5+/–) 25.Nc5 Qe7 26.f4 Nf7? 27.f5 Ng4+/– 28.hg4 g5?? 29.f6+– Qf6 30.Rf6 Kf6 31.Nd7 Ke7 32.Nf8 Rf8 33.Qa4 Kd7 34.Qa7 Ke6 35.Rf1 h6 36.Qb6 Rc8 37.Qb7 Nd6 38.Qh7 (38.Qh7 Re8 39.Qh6 Kd7 40.Rf6+–; 38.Qg7 Rf8 39.Rf8 Nf7 40.Qf7 Kd6 41.Rd8) 1–0. Nautiluschess – Specht, ICS blitz, 2001.

3.Nf3 Nf6

4.a4 d5 5.ab5 e6 6.Ne5 (6.Ba3 a6 7.e3 ab5 8.Bb5 c6=) 6...Bb4 7.c3 (7.e3!?+=) 7...Bd6+= 8.d4 Nbd7 9.Nd7 Nd7 (9...Kd7?! 10.e3=) 10.e3 Nb6 (10...0–0 11.Bd3+=) 11.Bd3 Qb8 (11...Nc4 12.Qc2+=) 12.Qb3 c6 13.bc6 Bc6 14.Ba3 0–0 (14...Bh2? 15.Qb4 Nc8 16.g3 Bg3 17.Rh7+– (17.fg3?? Qg3 18.Kd2 Qg2 19.Be2 Qh1–+)) 15.Bd6 Qd6 16.0–0 Rfb8 17.Nd2 Nc4 18.Nc4 dc4 (18...Rb3?? 19.Nd6 a5 20.Rfb1 Rb1 21.Rb1+–) 19.Qc4 Bd5? (19...Bb5 20.Qb5 Rb5 21.Bb5=) 20.Qc5 (better is 20.Qa6!? Qa6 21.Ba6+–) 20...Qc5= 21.dc5 Rc8? (21...a5!?=) 22.e4 Bb7 23.c6 (better is 23.Rfb1 Bc6 24.Ba6+/–) 23...Bc6= 24.Ra3 (24.Ba6!? Rcb8 25.f3=) 24...Rd8+= 25.Bb1 a5 26.e5 Bd5 (26...Rd2 27.Ra2 Ra2 28.Ba2–/+) 27.f4 a4 28.Bc2 Bc6 29.Rfa1 Rd2 30.g3?? (better is 30.Ba4 Rg2 31.Kf1=) 30...Rc2–+ 0–1. croach (2360) – grahamtrue (2295), net–chess.com, 2015.

4.a4 Ne4 5.ab5 e5 6.Be5 Bb4 7.Bg7 Rg8 8.Bb2 Bc5 9.e3 Rg5 10.Ng5 f6 11.Qh5 Kf8 12.Qf7 1–0. Bonetti,Shane – comepieces, ICC, 2002.

4.d3 d6 5.Nbd2 Nbd7 6.e4 g6 (6...e5 7.Be2=) 7.Be2 (7.Nb3 e5+=) 7...Bg7 8.Qc1 (8.0–0 0–0=) 8...0–0= 9.Rb1 a5 10.a3 (10.ba5 Ra5 11.a3 c6=) 10...ab4 11.ab4 c6 12.c3 Ra2 13.c4 bc4 14.Nc4 d5 (14...Qc7 15.Bd1=) 15.Na3 (15.Na5 Qc7=) 15...Qb8 (15...Qb6 16.Bd4 Qa6 17.Nc2=) 16.e5+= Ng4 17.d4 Qa7 18.h3 (18.0–0 Ra8 19.Nc2 Qa4=) 18...Nh6 19.Ng5 (19.0–0 Ra8=) 19...Nf5 (19...Ra8 20.Nc2=+) 20.Qc3 (20.Ra1 Rb2 21.Qb2 Nd4=+) 20...f6 (better 20...Nd4!? 21.Qd4 Qd4 22.Bd4 Ra3–/+) 21.Ne6= fe5 (21...Ra8 22.Ng7 Kg7=) 22.Ng7 (better 22.Nf8 Kf8 23.Qb3 (23.de5 Be5 24.Qb3 Bb2 25.Qa2 Ba3+=) 23...Rb2 24.Rb2 (24.Qb2?! e4=) 24...Nd4 25.Qe3+–) 22...ed4=+ 23.Qb3 Ra3 (23...Rb2 24.Qb2 Kg7 25.0–0=+) 24.Ba3= Kg7 25.Bb2 (25.0–0 e5=) 25...Kg8 (25...e5 26.0–0=+) 26.0–0 e5 27.g4 (27.Qd3 Qb6=) 27...Nh4 (27...Nd6 28.Kg2–/+) 28.Bc1 (28.Qg3 g5=+) 28...Ba6 (28...e4 29.Qg3 d3 30.Bd1–/+) 29.Ra1 (29.b5 d3 30.Qd3 (worse 30.Bd3 Nf3 31.Kh1 Qc7=+) 30...Bb5 31.Rb5=) 29...Qc7?? (better 29...d3 30.Bd1 Qb7–/+) 30.Ra6+– (30.Ba6 Rf3 31.Qc2 Rh3=) 30...e4 31.b5?? (better 31.Qg3 Qb7 32.Qh4+–) 31...Rf3+= 32.Rc6 (worse 32.Bf3 Nf3 33.Qf3 ef3=+) 32...Qe5 (32...Rb3?? 33.Rc7 Nb6 34.Rb7+–) 33.Rc8 (33.Qd5! Qd5 34.Bc4 Qc4 35.Rc4+=) 33...Kg7= 34.Qb2?? (better 34.Qf3! Nf3 35.Bf3 ef3 36.Bd2=+) 34…Rh3 (34...Rh3 35.Bh6 Kf7–+; 34...Rg3 35.fg3 Qg3 36.Kh1 Qg2) 0–1. patriss (1770) – Kabatana_Michael (1915), lichess.org, 2020.

4.d4 Nc6 5.e3 Nb4 6.Bb5 c6 7.Bd3 e6 8.a3 Nd3=+ 9.Qd3 c5 10.Nbd2 Bd5 11.dc5 Bc5 12.0–0 0–0 13.Ng5+/– g6 14.e4 Bc6+= 15.Qc3 d5?? 16.Qc5+– Qd7 17.Bf6 Rfc8 18.Qe3 h6 19.Qh3 Bb5 20.Qh6 (20...Bf1 21.Qg7 1–0. Bell,Alexander – Grayling, compuserve, 1998.

4.d4 e6 5.e3=.

4.e3 (--> 3.e3 Bb7 4.Nf3).

4.e3 a6 5.c4 bc4 6.Bc4 e6 7.a3 (--> 2.Bb2 Nf6 3.e3 Bb7 4.Nf3 e6 5.a3 a6 6.c4 bc4 7.Bc4).

4.e4 a6 5.e5 Nd5=.

4.g3 d5 5.Bg2 Nc6 6.a3 (6.a4 a6 7.Bf6 ef6=) 6...a6 7.0–0 d4? (7...e6 8.Nc3=) 8.d3 (8.Nd4 Qd7+–) 8...e5 (8...Rb8 9.c3+=) 9.Nbd2 (9.Ne5 Ne5 10.Bb7 Ra7+–) 9...Be7 (9...Nd5 10.Re1=) 10.c4 (better 10.Ne5!? Ne5 11.Bb7+–) 10...dc3 (10...Rb8 11.Nb3=) 11.Bc3+= Bd6 (11...Nd5 12.Be5 Ne5 13.Ne5 Qd6+=) 12.Ng5 (12.Ne5!? Be5 13.Be5 Ne5 14.Bb7+–) 12...Rb8 (12...0–0 13.Rc1=) 13.Nde4 Ne4 14.Ne4 0–0 15.Qd2 Nd4 16.e3 (16.Qa2 Re8=) 16...Ne6 (better 16...Nb3 17.Qb2 Na1 18.Qa1 Re8–+) 17.Nd6 cd6 18.Bb7 Rb7 19.d4 (19.f4 ef4 20.gf4 f5=) 19...ed4 (19...Ng5!? 20.f3 e4 21.fe4 Ne4–/+) 20.Bd4= Nd4 (20...Qg5 21.Rac1=) 21.Qd4+= Rd7 22.Rfd1 Re8 23.Rd2 (23.a4 Qc7+–) 23...Re6+= 24.Rad1 Qg5 (24...Qc8 25.Qf4+=) 25.f4 (25.Qb6!? d5 26.Qb8 Qd8 27.Qd8 Rd8 28.Rd5 Rd5 29.Rd5+–) 25...Qg4 (25...Qe7 26.Rd3=) 26.e4 (26.Qb6 h5 27.Qa6 Re3 28.Qb5 Ra3 29.f5=) 26...Rh6? (26...Rde7!?=) 27.e5 (27.Qb6 g5 28.Rf1 Rg6+–) 27...d5 28.Qc5 Qf3?? (better 28...Rd8+–) 29.Qc8 (29.Qc8 Rd8 30.Qd8) 1–0. JUANKARODA (1745) – ganzarov (1740), lichess.org, 2020.

4.g3 d6 5.Bg2 Nbd7 6.0–0 e5 7.d3 g6 8.Nbd2 (8.Ne5!? Bg2 9.Nd7+–) 8...Bg7+= 9.c4 bc4 10.Nc4 0–0 11.a3 Nb6 12.Na5 Bd5 13.Qc2 e4 14.de4 Be4 15.Qd2 (15.Bf6 Bc2 16.Bd8 Ba1 17.Bc7 Bf6 18.Bd6 Rfe8+=) 15...Qd7 (15...Na4 16.Bd4=) 16.Rac1+= Rac8 17.Nc4 Ba8 18.Nb6 ab6 19.h4 (19.Rfd1 Rfe8=) 19...Ne4 20.Qc2 Rfe8 (20...Bb2 21.Qb2 c5 22.Rfd1=) 21.Bg7 Kg7 22.Kh2 (better 22.Qb2 Kg8 23.b5=) 22...Qf5 (better 22...c5=) 23.Bh3+– Qd5 24.Bc8 Rc8 25.Qb2 Kg8 26.Kg1 (26.b5 Nc5+–) 26...g5 (26...c5 27.Rfd1 Qf5 28.bc5 bc5 29.a4+–) 27.hg5 (27.Rfd1!? Qf5 28.hg5 Ng5 29.Ng5 Qg5+–) 27...Ng5+– 28.Qf6 Nf3 29.Qf3 Qg5 (29...Qf3 30.ef3 Bf3 31.Rc3+–) 30.Qf4 Qh5 (30...Qf4!? 31.gf4 c5+–) 31.f3+– Re8? (better 31...b5+–) 32.Qg4 (better 32.Rc7 Qg6 33.Rfc1+–) 32...Qg4+= 33.fg4 Re2 34.Rf2 (better 34.Rf6 Re7 35.g5+–) 34...Re3? (34...Re7 35.a4+=) 35.Kf1?? (35.Rc7 Bd5 36.Rd2 Be4+–) 35...Rg3 (better 35...c6!?=) 36.Rc7+– Ra3 (36...Bd5!? 37.Rd2 Be6+–) 37.Rff7+– Ra1 (better 37...Rf3 38.Rf3 Bf3+–) 38.Ke2 Ra2 39.Kd3 Ra3 40.Kc4 Ra2 (40...Be4+–) 41.Rg7 (41.Rh7?! Bc6+–) 41...Kh8 42.Rh7 Kg8 43.Rhd7 Rc2 44.Kb5 Rc7 45.Rc7 (45.Rc7 Bg2 46.Kb6+–) 1–0. JUANKARODA (1785) – John2199 (1795), lichess.org, 2020.

4.g3 e6 5.Bg2 Bb4 6.Nc3 0–0 (6...a6!?–/+) 7.Nb5= c6 (7...a6!? 8.Nbd4 Nc6=) 8.Bf6+= gf6 9.Rb1 Bd2?? (better 9...Na6 10.Nd6 Bd6 11.Rb7 Nc5+=) 10.Nd2+– (10.Kd2?! cb5 11.Rb5 Bc6=; 10.Qd2?! cb5 11.Rb5 Bc6+–) 10...Qc8 (10...d5 11.Nd4 Qc7+–) 11.Nd6 Qc7 (11...Qc7 12.Nb7 d5+–). zsedwardson – gordiemac, ChessWorld.net, 2012.

4.g3 g6 5.Bg2 Bg7 6.0–0 0–0 7.d3 d6 8.Nbd2 e5 9.c4 bc4 10.Nc4+= Nbd7 11.a4 Rb8 12.b5 a6 13.Na5 (13.ba6 Bd5 14.Qc2=) 13...ab5 (13...Ba8 14.Nd2 Nd5 15.Nc6 Bc6 16.bc6 Rb2 17.Bd5= (worse 17.cd7 Nc3 18.Qe1 Qd7–+)) 14.ab5?? (better 14.Nb7 Rb7 15.Ne5+–) 14...Bf3 (14...Bd5 15.Qc2 Rb5 16.Rfb1–/+) 15.Bf3=+ Rb5 16.Nc6 (16.Qc2 e4 17.Bg2 c5=+) 16...Qe8 17.Bc3 d5 (better 17...Nd5 18.Ba5 N7f6=+) 18.Rb1?? (18.Bb4 e4 19.de4 de4–/+) 18...Rb1?? (better 18...Rc5 19.Bb4 Rc6 20.Bf8 Nf8–+) 19.Qb1=+ d4?? (better 19...e4 20.Bg2 Nb6=+) 20.Bb4+– Nb6 21.Bf8 Bf8 22.h4?? (22.Qc2 Nfd5+–) 22...Bd6?? (better 22...e4 23.Nd4 ef3–/+) 23.Qc2+– h6 24.Rb1 g5 (24...Qe6!?+–) 25.hg5+– hg5 26.Bg2 Qe6 0–1. JUANKARODA (1805) – mousatos (1750), lichess.org, 2020.

4.h3 Na6 5.a3 c6 6.g4 Nc7 7.Bg2 (7.g5 Ne4=) 7...Ne6 (7...a5 8.Nc3=) 8.e3 h6 (8...a5 9.Nc3=) 9.d3 d5 10.Nbd2 Qd7 (10...g6 11.a4=) 11.Nb3 g6 12.Qd2 (12.c4 bc4 13.dc4 Bg7+= (13...dc4? 14.Qd7 Kd7 15.Na5+–)) 12...Bg7 13.Qe2 0–0 14.Nfd2 (14.Be5 Rad8=) 14...Rac8 (14...Bc8 15.f4=) 15.f4+= c5 (15...Nh5 16.Bg7 Nhg7 17.0–0+=) 16.bc5 (16.f5!? gf5 17.gf5+–) 16...Nc5= 17.Nc5 Rc5 18.0–0–0? (better 18.Nb3 Rc7 19.Be5=) 18...Rfc8–+ 19.Nb3 Rc2 20.Qc2 Rc2 21.Kc2 a5 (21...Qe6 22.Bd4=+) 22.Kb1 a4 (22...b4 23.g5 hg5 24.fg5–/+) 23.Nc5= Qc7 24.Nb7 (better 24.Rc1!?=) 24...Qb7–/+ 25.g5 (25.Ka1 b4 26.Rb1 ba3–/+) 25...Nh5 (25...hg5!? 26.fg5 b4 27.Ka1 ba3 28.Bd4–+) 26.gh6–/+ Bb2 27.Kb2 b4 28.Rb1 (28.Ka1!?–/+) 28...Qb5–+ 29.Rhd1 Ng3 (29...ba3 30.Ka2 Qc5 31.Bf3 Qe3 32.Bh5 gh5 33.Ka3–+) 30.Rd2 (30.Bf3 Nf5 31.ab4 Ne3–+) 30...Nf5 31.e4 Ne3 32.ed5?? (32.Rc1 Ng2 33.Rg2 Qd3 34.ab4 Qe4–+) 32...Ng2 (better 32...Qc5 33.Ka2 b3 34.Rb3 ab3 35.Kb3 Ng2 36.d6 ed6 37.d4 Qd5 38.Kb4–+) 33.Rg2 Qd3 34.ab4 (34.Rbg1 Qa3 35.Kb1 Qd3 36.Kc1 Qd5 37.Rc2–+) 34...Qd5 (better 34...a3 35.Ka2 Qd5 36.Rb3 Qg2 37.Ka3 Qa8 38.Kb2 Qf8–+) 35.Rc2 (better 35.Rg3!?=+) 35...Qb3 36.Kc1 Qe3 (36...Qh3 37.Kb2–+) 37.Kb2–/+ a3 (37...Qh3 38.b5 Qb3 39.Kc1 Qe3 40.Kb2 Kh7–+ (40...Qf4?! 41.b6=)) 38.Ka1 (38.Ka2 Qf4 39.Rb3 Qf5= (39...Qh6? 40.b5 Qf4 41.b6+–)) 38...Qf4 (38...Qh3 39.b5 Qd3= (worse 39...Qh6 40.b6 a2 41.Rb4 Qh1 42.Ka2 Qd5 43.Rcc4+–)) 39.Rc8 (39.Ka2!?=) 39...Kh7–/+ 40.b5?? (better 40.Rc3–/+) 40...Qf6 41.Ka2 Qe6 42.Rb3 Qc8 43.b6 Qb7 44.Ra3 (44.Ka3 e5 45.Kb2–+) 44...Qb6 45.Rb3 (45.Ra4 Qe3 46.Rc4 Qh3–+) 45...Qa5 (better 45...Qb3! 46.Kb3 Kh6 47.Kc4–+) 46.Kb2 Kh6 47.h4 e5 (47...Qd5 48.Rc3 Qd2 49.Kb3 Qc3 50.Kc3–+) 48.Rb7 (48.Rh3 e4 49.h5 Qd2 50.Kb3 gh5–+) 48...Qd2 49.Ka3 Qd6 50.Kb2 Qd5 (better 50...Qd4 51.Ka2–+) 51.Ka3 (51.Rc7 e4 52.Rc2 Qd4 53.Kb3 e3–+) 51...f5 (51...Qb7 52.h5 e4 53.hg6 fg6 54.Ka4 e3 55.Ka5 e2 56.Ka4 e1Q 57.Ka3 Qa5) 52.Rb4 e4 53.Kb2 e3 54.Kc2 Qd2 55.Kb1 Qb4 56.Kc1 (56.Ka1 e2 57.Ka2 e1Q 58.h5 Qeb1) 56...Qd2 57.Kb1 e2 58.h5 e1R (58...e1Q) 0–1. adabriwala (1620) – Primkulov (1875), lichess.org, 2019.

4.h3 d6 5.Bf6 ef6 6.a4 a6 7.ab5 ab5 8.Nc3 (8.Ra8 Ba8 9.e3 Bf3 10.Qf3 c6+=) 8...Nd7 (better 8...Ra1!? 9.Qa1 Bf3 10.gf3 c6=) 9.Nb5+= d5 (9...Ra1 10.Qa1 Ne5 11.Qa7+–) 10.Ra8+– Ba8 11.Qa1 Bb4 12.Qa8!? 0–0?? (12...Qa8 13.Nc7 Double attack (13.Nc7 Decoy)) 13.Qd8+– Rd8 14.Nc7 Ne5 15.Ne5 (15.Nd4!? Rd7 16.Ncb5 Nc4+–) 15...fe5 16.c3 Ba5 17.Nb5 Rb8 18.e3 e4 (18...Rc8 19.Be2+–) 19.Be2 h5 20.0–0 f5 21.Ra1 Bd8 22.Ra6 Be7 23.Nc7 Rd8 (23...Rb1 24.Kh2 d4 25.cd4+–) 24.Bh5 Rd7 25.Ne6 Rb7 (25...Rd6 26.Rd6 Bd6 27.Bg6+–) 26.Bg6 Rb8 (26...Rb1 27.Kh2 Rb8 28.Bf5+–) 27.Nd4 (27.Nf4 Bf6 28.Nd5 Rb1 29.Kh2 Rb8+–) 27...Rf8 (27...f4 28.Bf5 fe3 29.Be6 Kh7 30.fe3+–) 28.Ra7 (28.Bf5 Rf5 29.Nf5 Bf8+–) 28...Bf6 (28...Bc5 29.Rd7 Bd4 30.ed4+–) 29.Nf5 Rb8 (29...Rd8 30.f4 ef3 31.gf3+–) 30.Bf7 Kh7 31.Bd5 Be5 (31...Rb1 32.Kh2 Rb2 33.Be4+–) 32.Ra1 (32.Be4!? Kh8+–) 32...Kg6 (32...Rb2 33.Be4 Rd2 34.Nd6 g6 35.Nc4 Bc3 36.Ra7 Kh6 37.Nd2 Bd2 38.Ra6+–) 33.Be4 Kf6 (33...Rd8 34.Ra7 Kf6 35.f4+–) 34.f4 Bc7 35.Ra6 Kf7 36.Nd4 (better 36.Ra7 Kf6 37.Rc7 g6 38.Rc6 Kf7 39.Bd5 Ke8 40.Rg6 Rb2+–) 36...Kg8 37.Ra8 Ra8 38.Ba8 Kf7 39.Nb5 Bb8 (39...Bd8 40.Bd5 Ke7 41.d4+–) 40.c4 Ke7 41.d4 Kd7 42.c5 Kd8 43.c6 Kc8 44.d5 Kd8 45.d6 Bd6 46.Nd6 g5 47.fg5 Kc7 48.Nf7 (48.Ne8 Kd8 49.c7 Kc8 50.g6 Kd7 51.g7 Ke8 52.g8Q Ke7 53.c8Q Kf6 54.Qce6) 48...Kc8 49.g6 Kb8 (49...Kc7 50.g7 Kb8 51.g8Q Ka7 52.Qd8 Ka6 53.Nd6 Ka7 54.Qa5 Kb8 55.c7) 50.Bb7 (50.g7 Ka8 51.g8Q Ka7 52.c7 Kb6 53.Qb8 Ka6 54.c8Q Ka5 55.Qc5 Ka4 56.Qbb5) 50...Kc7 51.g7 Kb6 52.g8Q Kc7 (52...Kb5 53.Qg4 Ka5 54.c7 Kb6 55.Qb4 Kc7 56.Bd5 Kd7 57.Qd6 Ke8 58.Qd8) 53.Qd8 1–0. beatmeeasy (1935) – alica67 (1935), lichess.org, 2021.

2.Bb2 Nc6

3.a3 a6 (--> 1.b4 a6 2.Bb2 Nc6 3.a3 b5).

3.a3 Ba6 4.e3 Nf6 5.Nf3 d6 (5...e6 6.Bd3+=) 6.c4 (6.Bf6 ef6 7.Nc3 d5+–) 6...bc4+= 7.Nc3 (better 7.Qa4 Bb7 8.Bf6 gf6 9.Bc4+=) 7...d5? (better 7...e5+=) 8.b5 (8.Qa4 Bb7 9.Ne5 e6+–) 8...d4 (8...Qd7 9.bc6 Qc6 10.Ne5+–) 9.ed4 (9.ba6?! dc3 10.Bc3 Rb8+–; 9.bc6?! dc3 10.Bc3 Qd5+=) 9...Bb5 10.Nb5 a6 (10...Na5 11.Qa4 c6 12.Bc3+–) 11.Nc3 Nd4 (11...e6 12.Bc4 Na5 13.Qa4 c6 14.d3+–) 12.Nd4 (better 12.Qa4!? Nb5 13.Nb5 ab5 14.Qb5 Nd7 15.Bc4 e6+–) 12...Qd4 13.Qc2 (13.Rb1 Ne4 14.Ne4 Qe4 15.Be2 Rb8+–) 13...Rb8 (13...e6 14.Rc1+–) 14.Be2 (14.Rb1 e5+–) 14...Nd5 (14...e6 15.Rb1+–) 15.0–0 (15.Nd1 c3 16.Nc3 Qe5+–) 15...Nc3 (15...Nf4 16.Qa4 Kd8+–) 16.Bc3 Qc5 17.Qa4 Rb5 (17...Qb5 18.Qc4 Qc4 19.Bc4 Ra8+–) 18.Bc4 c6 (18...f6 19.d4 Qb6 20.Rfe1+–) 19.Bb5 (19.Qa6 Kd7 20.Bb5 Qb5 21.Qa7 Ke6 22.Rfe1 Kf5 23.Qd7 Kg6+–) 19...cb5 (19...Qb5 20.Qd4 Qb8 21.Rfb1+–) 20.Qa6 Qc8 (20...f6+–) 21.Qc8 1–0. GuestJBLJ – GHFT, freechess.org, 2016.

3.Na3 Rb8 4.c3 e5 5.e4 Nf6 6.d3 (6.Bb5 Ne4 7.Qe2 Nf6) 6...h5 (6...Be7 7.Nf3=+) 7.h3 Rh6 (7...d5!?=) 8.Nf3 d6 9.Nb5?? (better is 9.d4 a6 10.d5) 9...Rb5–/+ 10.a4 (10.Bc1 Rh8–+) 10...Rb7–+ 11.Be2 Be6 12.b5 Na5 13.0–0 c6 14.d4 (14.c4 a6–+) 14...ed4 (14...Ne4 15.de5 Bc4 16.Re1–+) 15.Nd4 (15.Bc1 Rg6 16.bc6 Rc7–+) 15...Ne4 16.c4 c5 (better is 16...d5–+) 17.Nf3? (17.Ne6 fe6 18.Bh5 g6–/+) 17...Bc4 18.Nd2?? Qh4 19.Qe1?? Re7 20.Nc4= Ng5 21.Na5 Rhe6 22.Ra3 Re2–/+ 23.Qd1? Qe4?? 24.Bc3? g6?? 25.Bf6 Nh3 26.gh3 Re5?? 27.Be5+– Qe5 28.Nc6 Qb2 29.Re3 Re3 30.fe3 c4 31.Na7 c3 32.Qc1 d5 33.Qb2 cb2 34.Rb1 Bg7 35.b6 Kd8 36.a5 d4 37.e4 d3 38.Kf1 Bd4 39.Ke1 g5 40.Nb5 Be5 41.b7 f6 42.Kd2 g4 43.hg4 hg4 44.Kd3 g3 45.Ke2 g2 46.Kf2 g1Q 47.Kg1 Kd7 48.a6 Kc6 49.a7 Kb7 50.Kf1 Bd4 51.Ke2 Ba7 52.Na3 Bd4 53.Nc4 Kc6 54.Na3 Kc5?? 55.Kd3+– Kb4 56.Nc2 Kb3 57.Kd4 Kc2= 58.Rb2 Kb2 59.Kd5 Kc3 60.Ke6 Kd4 61.Kf5 Kd3 62.Kf4 Kd4 63.Kf3 Ke5 64.Ke3 f5 65.ef5 Kf5 66.Kf3 ½–½. yeatond – dwitman, net–chess.com, 2005.

3.a4 a5? 4.ab5+– Nb4 5.e4 a4? (better 5...Bb7!? 6.d3 d5+–) 6.c3+– a3 (6...Bb7 7.cb4 Be4 8.Nc3+–) 7.cb4 (better 7.Ra3 Bb7 8.d3+–) 7...ab2 (7...Bb7 8.Na3 Be4+–) 8.Ra8 e5 0–1. GuestCFMD – rigarus, freechess.org, 2018.

3.a4 d6 4.ab5 Nb4 5.c3 (better is 5.e4 Rb8 6.Ba3+–) 5...Nd5+= 6.c4 Nb4 7.Nf3 Bf5 8.d3 Qd7 (8...a5!?+=) 9.e4 Bg6 10.Nc3 Qe6?? (better is 10...a5+/–) 11.Qa4+– c5 (11...Nd3 12.Bd3 Qd7 13.Nh4+–) 12.bc6 (12...Qc8 13.Qb4+–) 1–0. Wall,Bill – Phillio, Microsoft Gaming Zone, 2004.

3.a4 Nf6 4.ab5 Nb4 5.e3 Bb7 6.Nf3 e6 7.c3 Nbd5 8.c4 Nb6 (8...Nb4 9.Qb3=) 9.Qc2 (9.Nc3 Bc5+=) 9...Be7 (9...Be4 10.d3 Bb7 11.Be2+–) 10.Be2+– c6 (10...0–0 11.0–0+–) 11.Nc3 (11.bc6 Bc6 12.0–0 0–0+–) 11...0–0 (11...c5 12.0–0+=) 12.0–0 (12.bc6 Bc6 13.0–0 Bf3 14.Bf3 Nc4 15.Ba8 Qa8+–) 12...d5 (12...c5 13.Ne5+=) 13.bc6 Bc6 14.Ne5 Qc7 (14...Bb7 15.cd5 Nfd5 16.Nd5 Nd5 17.Rfc1+–) 15.Nc6 (15.cd5 Bb7 16.Nc6 Nbd5 17.Ne7 Qe7 18.Nd5 Nd5+–) 15...Qc6 16.cd5 Nbd5 17.Bf3 Nd7 (better 17...Rfc8!?+–) 18.Rfc1+– Rac8?? (18...Qb7 19.Nd5 ed5 20.Rcb1+–) 19.Be4 (19.Nd5 Qc2 20.Ne7 (20.Rc2?! ed5 21.Rc8 Rc8+–) 20...Kh8 21.Rc2 (21.Nc8?! Qb2 22.d4 e5=) 21...Rc2 22.Bc3+–) 19...f5?? (better 19...Qb6 20.Bh7 Kh8+–) 20.Nd5 Qc2 (20...Qd6 21.Ne7 Qe7 22.Qc8 Rc8 23.Rc8 Kf7 24.Bc6+–) 21.Ne7 Kh8 (21...Kf7 22.Rc2 Ke7 23.Ba3 Kf6 24.Bf8 Rf8 25.Bb7+–) 22.Bc2 (22.Bc2 Ra8 23.Ba4+–) 1–0. GuestFXQQ – GuestZPWT, freechess.org, 2020.

3.Nc3 a6 4.a4 Nb4 5.ab5 a5 6.Nf3 Bb7 7.e3 Bf3 8.gf3 e5 9.Ne4 d6 10.d4 Qh4 (10...f6 11.c3 Nd5 12.c4+=) 11.d5 (better 11.c3 Nd5 12.de5 Ne3 13.Qa4+–) 11...Nf6?? (better 11...Ne7 12.c4 Nf5+=) 12.Nf6+– gf6 13.c3 Nd5 (13...Bh6 14.Bc1 a4+–) 14.Qd5 Bh6 (14...Rc8+–) 15.Qa8 Ke7 16.Qe4 (better 16.Qh8 Be3 17.Kd1 Qf2+–) 16...Qe4 17.fe4 Ke6 (17...Ra8 18.Ra4+–) 18.Bh3 Ke7 19.Ra5 Bg5 (19...Rb8 20.c4 Rb7 21.Bf5+–) 20.Ra7 Rc8 21.Bc8 h5 22.b6 Kd8 (22...Kf8 23.b7 Kg8 24.b8Q Kf8 25.Qc7 Kg7 26.Qf7 Kh6 27.Qg7) 23.b7 (23.b7 Ke7 24.b8Q Kf8 25.Qc7 Kg7 26.Qf7 Kh6 27.Qg7; 23.Bf5 Ke7 24.bc7 Be3 25.fe3 Kf8 26.Rg1 Ke7 27.c8Q) 1–0. Mr_Toad (2165) – WarlpiriMan, ChessWorld.net, 2011.

3.d4 Nb4=+ 4.e4 c6 5.c3 Na6 6.Nf3 Nb8 (6...Nf6 7.Bd3=+) 7.Bd3= a5 8.0–0 a4 9.Nbd2 Ba6 10.h3 Nf6 11.a3 e6 12.c4 (better is 12.Rb1=) 12...b4?? (better is 12...bc4 13.Be2 d5=+) 13.ab4+/– Bb4 14.Ra4 Bd2 15.Qd2 h5? (15...d5!? 16.ed5 cd5) 16.Ng5 (16.e5 Ng8+–) 16...g6 (16...d5 17.Rfa1 de4 18.Ne4 Ne4 19.Be4+–) 17.c5 (better is 17.e5!? Nh7 18.Ne4 0–0+–) 17...Bd3 18.Ra8 Ne4 19.Ne4 Be4 20.Qb4 Ke7?? 21.d5! Re8 22.d6 Kf8 23.Qe4 Kg8 24.Qe5 f6 25.Qf4 Rf8 26.Qh6 Kf7 27.Qh7 Ke8 28.Rb8! Qb8 29.Qe7 1–0. I need chocolate... – arian1230, ChessWorld.net, 2005.

3.e3 Bb7 4.a3 d5 5.Bb5 e5 6.Bc6 Bc6 7.Be5 Qe7 8.Nf3 f6 9.Bg3 f5 10.Nd4 Nf6 (10...Qd7+–) 11.Nc6 Qd6 (11...Qd7 12.Ne5 Qe6+–) 12.Bd6 Bd6 13.Nd4 (better 13.Qf3!? Kd7 14.b5 f4+–) 13...Be5 14.Nf5 (better 14.c3 Bd4 15.Qa4 Kf7 16.cd4 a5+–) 14...Ba1 15.Ng7 Kf7 16.Nf5 Ke6 17.Qf3 Rhf8 18.Ng7 Kf7 (18...Ke7 19.Qf5 Rf7 20.Ne6+–) 19.Nh5 Kg6 (19...c6 20.Nf6 Bf6 21.Qf5+–) 20.Nf6 Rf6 21.Qd5 Kg7 22.0–0 (better 22.Qa8 a6+–) 22...Raf8 23.f3 (better 23.c3!? a5+–) 23...Rf5 24.Qb7 R8f7 25.Qe4 (25.Qa7 Re5+–) 25...c5 26.b5 (26.c3 h5+–) 26...c4 (26...Kf8 27.g4 R5f6 28.Qd5+–) 27.Qc4 Be5 28.Nc3 Bc3 29.dc3 (29.Qc3 R5f6+–) 29...Kg6 30.Qc6 (better 30.Rd1 R5f6 31.Qg4 Kh6 32.Rd7 Rd7 33.Qd7+–) 30...Kg5 31.Qe4 (31.h4 Kh5 32.g4 Kh4 33.Qh6 Rh5 34.Qh5 Kg3 35.Qh2) 31…R7f6 (31...R7f6 32.g4 Rb5 33.Qh7 Rg6 34.f4 Kf6 35.g5 Kf5 36.Qd7 Re6 37.e4 Kg6 38.Qe6 Kg7 39.Rd1 Rd5 40.Qe7 Kg6 41.Qe8 Kg7 42.Rd5 a6 43.Rd7) 0–1. atif_zubair – quirijn08, lichess.org, 2019.

3.e3 Rb8 4.Nf3 (4.a3!?=) 4...Nb4=+ 5.a3 (5.Be2 Nf6=+) 5...Nd5 6.Bd3 (6.Be2 Ngf6=+) 6...b4 (6...e6 7.0–0=+) 7.0–0 (7.Bd4 a6=) 7...e6 (7...ba3 8.Ba3 d6 9.c4=) 8.e4 Nb6 (better 8...Nf4!? 9.ab4 Rb4=) 9.ab4+– Bb4?? (better 9...Rb7+–) 10.Bg7+– (10.Ra7?! Nf6+=) 10...f6 (10...Ra8 11.Bh8 Bb7 12.c3+–) 11.Bh8 Nh6 (11...Rb7 12.Nd4 Qe7 13.Nb5+–) 12.e5 Ng4 (12...fe5 13.Be5 Ng4 14.Bh7+–) 13.ef6 (better 13.c3 Bc5 14.Bh7 fe5 15.Bg6 Ke7 16.Be5 Ne5 17.Ne5+–) 13...Kf7 (13...Nf6 14.Ra7 Nbd5+–) 14.Ng5 (better 14.Ne5 Kf8 15.Qg4 Qe7 16.Bh7 Qf7 17.Qg7 Qg7 18.Bg7 Ke8 19.f7 Kd8 20.Bf6 Be7 21.f8Q) 14...Kg8 15.Qg4 Qf8 (15...Qe7 16.fe7 Be7 17.Qh5 h6 18.Qg6 Kh8 19.Nf7) 16.Nf7! (16.Nf7 Kf7 17.Qh5 Kg8 18.Qh7) 1–0. DEFFM – GuestCDQC, freechess.org, 2018.

3.e3 e5 4.Bb5 Nb4 5.a3 c6 6.Bc4 Nd5 7.Bd5 cd5 8.Be5 Qe7 9.Bd4 Nf6 10.Nc3 Bb7 11.Nge2 a6 12.Nf4 h6 13.Rb1 Bc6 14.a4 g5 15.Nfd5 Nd5 16.Bh8 Nc3 17.Bc3 Bg2 18.Rg1 Qe4 19.Rb2 Bf3 20.d3 Qc6 21.Qd2 Rc8 22.Bd4 Qa4 23.Rb3 a5 24.Rg3 g4 25.Rf3 gf3 26.Qd1 Qa2 27.c4 Bb4 28.Kf1 Rc6 29.Rb2 Qa3 30.Qc2 Qa1 31.Rb1 Qa3 32.Ra1 Qa1 33.Ba1 Rg6 34.Qd1 1–0. Machete99 – guest1225, ICC, 2002.

3.e4 a5=.

3.e4 a6 4.a3 e5 5.Nf3 d6 6.c4 bc4 7.Bc4 Qe7 8.Bd5 Bb7 9.Qc2 Qd7 10.0–0 Ra7 11.Rc1 Nge7 12.Bb3 f6 13.Ba4 Kd8 14.d4 d5 15.de5 Qe6 16.Nd4 Qd7 17.ef6 gf6 18.Nc6 Bc6 19.Bc6 Qc6 20.Qc6 Nc6 21.Bf6 Kd7 22.Bh8 de4 23.Nc3 Bh6 24.Rd1 Kc8 25.Ne4 Kb7 26.Rd7 Ra8 27.Rh7 Bg5 28.Ng5 1–0. pumpkin – maviay (2095), net–chess.com, 2014.

3.e4 e6 4.Nf3 (4.a4 ba4 5.b5 Nb8) 4...Nge7 (4...Nb4 5.Bb5 Rb8 6.Nc3=) 5.d4 (5.Bb5 Nb4 6.a3 Rb8) 5...Ng6 (5...Nb4 6.Qd2 Na6 7.Bb5) 6.a3 a6 7.c4 (7.d5 ed5 8.ed5 Nce7) 7...bc4 8.Bc4 d5 9.ed5 ed5 10.Bd3 (10.Bb3 Qe7 11.Ne5 f6 12.Bd5 Bd7) 10...Qe7= 11.Qe2 (11.Kd2 Qf6=) 11...Nf4 12.Qe7 Be7 13.Bc2 (13.Bf1!?=) 13...Ng2–/+ 14.Kf1 (14.Kd2 0–0–/+) 14...Bh3 15.Ke2 (15.Ba4 Nf4 16.Ke1 Bd7 17.Bc6 Bc6–/+) 15...0–0 16.Bc1 (16.Rg1 Rab8–/+) 16...Rfe8 (better is 16...Bg4 17.Be3 Bf6–+) 17.Kd1?? (better is 17.Kd3!?–+) 17...Bf6 (better is 17...Bg4 18.Nbd2 Nd4 19.Rg1–+) 18.Nc3?? (18.Ba4 Nd4 19.Nd4 Bd4 20.Be8 Re8 21.Ra2 Bg4 22.Kd2–+) 18...Bg4 19.Nd5 (19.Kd2 Bf3 20.Ba4 Nd4 21.Be8 Nb3 22.Kd3 Re8 23.Rb1–+) 19...Bf3 20.Kd2 Bd5 (21.Bb2 Nf4–+) 0–1. Kaczmarek,Michal – Kuyumcuoglu,Arman, IECC, 1998.

3.Nf3 Nb4 4.e3 a6 5.d4 (5.a4 ba4 6.Ra4 Nc6=+) 5...Nc6 (5...Bb7 6.a4 Be4 7.Na3=+) 6.d5 Na7 7.Be2 Bb7 8.e4 c6 9.0–0 cd5 10.ed5 e6 11.de6 de6 12.Qe1 (12.Nbd2 Nf6=+) 12...Qb6 (12...Rc8 13.Qc1–/+) 13.c4 (13.Nbd2 Rd8=+) 13...bc4–/+ 14.Be5 Bb4 (14...f6 15.Bd4 Bc5 16.Bc3–/+) 15.Qd1 (better is 15.Nbd2!? Nf6 16.Nc4=) 15...Rd8 16.Qc2 f6 17.Bd4? (better is 17.Bc3–/+) 17...Qc7?? (better is 17...Rd4 18.Nd4 Qd4 19.Qc4 Qc4 (19...Qa1 20.Qb4 Bd5 21.Nc3+–) 20.Bc4 Ke7–+) 18.Ba7+= Ne7? (18...Bd6 19.Qa4 Qd7 20.Qc4 Bf3 21.Bf3 Qa7 22.Qe6 Ne7 23.Rc1+=) 19.Nd4 (better is 19.Qa4 Nc6 20.a3+–) 19...0–0? (better is 19...Bd5!? 20.Qa4 Rd7 21.Qb4 Qa7+/–) 20.Ne6+– Qe5? (20...Qc6 21.Nf4 Rc8+–) 21.Nd8 Qa1 (21...Bd5 22.Bc4 Rd8+–) 22.Qc4 (better is 22.Nb7 Rc8+–) 22...Kh8 (22...Bd5 23.Qb4 Qe5 24.Bc5 Rd8 25.Be7+–) 23.Nf7 (23.Qb4 Qe5 24.Nb7 Qe2+–) 23...Kg8 (23...Rf7 24.Qf7 Bd5 25.Qf8 Bg8+–) 24.Qb4 Kf7 (24...Qa2 25.Bc4 Qc4 26.Qc4+– (26.Qe7?! Bg2 27.Nh6 gh6+/–)) 25.Bc4 Kg6 (25...Bd5 26.Nc3 Qf1 27.Kf1+–) 26.Qb7 (better is 26.Qe7!? Bg2 27.Kg2 Qe5 28.Qf8 Qe4 29.Kg3 Qc4+–) 26...Nf5 (26...Qe5 27.Qa6 Nd5 28.Rd1+–) 27.Bd3 Qe5 28.g4 Kh6 29.Bf5 (29...g6 30.Be3 Qe3 31.fe3+–) 1–0. stoker – kilmer49, Live Game Caissa's Web, 2004.

3.a3 a5

4.ba5 Na5 5.e3 Nc4 6.Bc4 bc4 7.d3 d5 (7...d6!?=) 8.dc4+– dc4 9.Qd8 Kd8 10.Nf3 Ba6 11.Bd4 Nf6 12.Bf6 (12.Nc3 e6+–) 12...ef6+= 13.0–0 Bd6 14.Rd1 Ke7 15.a4 Be5 16.Ne5 fe5 17.Nc3 c6 18.Rd2 Rhd8 19.Rad1 Rd2 20.Rd2 Rd8 21.Rd8 Kd8 22.g4 Kd7 1–0. Phomopsis – aravind555, lichess.org, 2017.

4.ba5 Na5 5.e3 c6 6.Nf3 f6 7.Be2 e5 8.0–0 e4 9.Nd4 d5 10.Nc3 Ra7 11.d3 Ne7? (better is 11...f5!?+=) 12.de4+– Nc4 13.Bc1 f5 (13...Qa5 14.Qe1+/–) 14.ef5 (14.ed5 Qa5 15.Qd3 Ne5+–) 14...Qd6? (better is 14...Qa5!? 15.Qe1 Qb6+–) 15.e4 de4 16.g3?? Bf5?? 17.Nf5 Qe5 18.Ne7 Qe7?? 19.Re1 Rd7 20.Bd3! Rd4 21.Ne4 Qd8 22.Nd6 Kd7 23.Nf7 Qf6 24.Nh8 h6 25.Qe2 Kc7 26.Bf4 Bd6 27.Bd6 Qd6 28.Qe7 Kb6 29.Qd6 Nd6 30.Ng6 Rd5 31.a4 Kc7 32.ab5 cb5 33.Ra7 Kb6 34.Rg7 h5 35.Re5 Rd4 36.Re6 Kc5 37.Rc7 Kd5 38.Re5 1–0. Neumann,Frank – Lewis,Patrick, OP–2011–0–01869, 2011.

4.ba5 Na5 5.e3 e6 6.Bb5 (better is 6.Nf3+=) 6...Rb8–/+ 7.Bc3 (7.a4 c6 8.Qg4 cb5 9.Bg7 Bg7 10.Qg7 Qf6 11.Qf6 Nf6 12.ab5 Rb5–/+) 7...Rb5 8.a4 Rc5 9.d4 Rc3 10.Nc3 Bb4 11.Qd3? (11.Nge2 Ba6 12.Qb1 Nc6–/+) 11...Bb7 (11...Ba6 12.Qa6 Bc3 13.Ke2 Ba1 14.Qa5–+) 12.f3? (12.Kf1 Nf6–/+) 12...Nf6?? (12...Ba6 13.Qa6 Bc3 14.Kf2 Ba1 15.Qa5 c6 16.Qd8 Kd8–/+) 13.Kf2 c5 14.dc5 Bc5 15.Nge2 0–0 16.Ne4?? (better is 16.Rhb1–/+) 16...Be4 (better is 16...Ne4 17.Kg1 Qg5 18.Nd4–+) 17.fe4 Ng4 18.Ke1 Qf6 19.Nd4 (19.Rb1 Qf2 20.Kd1–+) 19...Qf2 20.Kd1 Ne3 21.Kc1 Bd4 22.Ra2 e5 23.Qb5 Nec4 24.Kb1 Qe3 (25.Qb4 Nd2 26.Kc1 Ne4 27.Kb1 Nc3 28.Ka1 Nd5 29.Kb1 Nb4 30.Rd1 Rb8 31.c3 Qe4 32.Rd3 Qd3 33.Ka1 Bc3 34.Rb2 Nb3 0–1. Bartle,Georg – Friedrich,Matthias, Verbandsliga Sued Baden, 1998.

4.c3 ab4 5.cb4 d5 6.Nf3 Nf6 7.e3 e6 8.Bb5 Bd7 9.0–0 Rb8 10.Ba4 Ne5 11.Ne5 (11...Qc8 12.Nd7 Nd7 13.Bc6+–) 1–0. Wall,Bill (2365) – Joccew, Microsoft Gaming Zone, 1999.

4.c3 ab4 5.cb4 d6 6.Nf3 (6.Nc3 Na7+=) 6...e6 (6...Nf6 7.Nc3 Na7 8.e4+=) 7.e4 d5? (better 7...Na7+=) 8.Bb5+– Bd7 9.ed5 ed5 10.0–0 Nf6 (10...Nce7 11.Bd7 Qd7 12.Re1+–) 11.Re1 (11.Qe2 Qe7+–) 11...Be7 (11...Ne7 12.Bd7 Qd7 13.Qc2+–) 12.Qc2 (better 12.Bf6 gf6 13.Nc3+–) 12...g6?? (12...Na7 13.Bd7 Qd7+–) 13.Bc6 Bc6 (13...Ra6 14.Bf6 Rc6+–) 14.Qc6 Kf8 15.Re7! Qe7 (15...Qe7 16.Bf6 Double attack (16.Qa8 Deflection; 16.Bf6 Decoy; 16.Bf6 Remove defender; 16.Qa8 Overloading); 15...Ke7 16.Bf6 Double attack (16.Bf6 Remove defender)) 16.Bf6 Qe8 17.Qe8 Ke8 18.Bh8 Ke7 19.Bd4 f5 20.Nc3 1–0. guestyacc – guestafyn, internet free game, 2018.

4.c3 e5 5.e4 ab4 (5...Rb8 6.Nf3=) 6.cb4 Rb8 7.Nc3 d6 (better is 7...Ba6!?+=) 8.Bb5+– Bd7 9.Ba4 Nf6 10.Nf3 Rb6 (10...Be7 11.0–0+/–) 11.0–0+– Be7 12.Qc2 0–0 13.Rfd1 (13.Rfc1 Qa8+–) 13...Qc8 (13...Nd4 14.Nd4 ed4 15.Nd5 Nd5 16.Bd7+/–) 14.Bc6 Rc6 15.Qb3 (15.b5 Rc5 16.a4 Bg4+–) 15...Bg4 16.b5 Be6 (16...Rb6 17.a4+/–) 17.Nd5 (better is 17.Qc2!? Rb6 18.a4+–) 17...Bd5+= 18.ed5 Rc5? (better is 18...Rb6!?+=) 19.d4+– Rd5 20.de5 Rd1 21.Rd1 de5 22.Be5 Ne4 23.h3 (23.Re1!? Qb7+–) 23...Bc5+/– 24.Bd4 Bd6 25.a4 c5 26.Be3 c4 (26...Qb7 27.Qc4+–) 27.Qc2 Rd8? (27...Qa8 28.Rd4 Re8 29.Qc4+–) 28.Rc1 (better is 28.Qe4 Bh2 29.Kh2 Rd1+–) 28...c3?? (28...Qa8+–) 29.Qe4 Ba3 30.Rc2 Rd1 31.Kh2 Bb2 32.b6 (32.Ng5 f5 33.Qe5 h6+–) 32...f5 (32...Qf8 33.b7 Ba3 34.Rc3+–) 33.Qe5 Qa8 (33...Rd8+–) 34.b7 Qb7 35.Qe8 1–0. nimzo1 – 321sacrifice419, ChessWorld.net, 2016.

4.Bc3 ab4 5.ab4 Nb4?? (better is 5...Ra1 6.Ba1 Nb4=+) 6.Ra8+– Na6 (6...e6 7.e4 c6 8.e5+–) 7.e3 c6 (7...Nc5+–) 8.d4 (better is 8.Ba5! Nc7 9.Ra7 e5 10.Bc7 Qf6+–) 8...d5 (8...Qc7 9.Bd2 Qb7 10.Ra6 Qa6 11.Bd3+–) 9.Nd2 (better is 9.Na3 Qd7 10.Nb5+–) 9...Qd7 10.Ngf3 Qb7 11.Ra6 Qa6 12.Qa1 Qa1 13.Ba1 e6 14.Bd3 f5 15.0–0 Nf6 16.Ne5 Bd6? (16...Bb7 17.Bb2 Bb4 18.c3+–) 17.Bc3 b4 18.Bb2 0–0 19.Ra1 Ne4 20.Ndf3 c5 21.Ra7 Be5? 22.de5 c4 23.Be4 de4 24.Nd4 Rd8 25.Ra8 c3 26.Bc1 Kf7 27.h3 Kg6 28.Ne6 Rd1–/+ 29.Kh2 Rc1?? 30.Rc8+– Rc2 31.Rg8 Kf7–+ 32.Rg7 Ke6 33.Rb7 Rb2 34.Rb5 c2 35.Rc5 Rb1 36.Rc2=+ Ke5 37.f3 b3 38.Rc5 Ke6 39.fe4 fe4 40.Rc4 Kd5 41.Rd4 Ke5 42.g4? Re1 43.Rd7 b2 44.Rb7 b1Q 45.Rb1 Rb1 46.h4 Re1 47.g5 Re2 48.Kg3 Re3 49.Kg4 Re1 50.h5 Rg1 51.Kh4 e3 (52.Kh3 e2 53.g6 e1Q 54.h6 Qg3 0–1. Soellner,Eric (1650) – von Wascinski,Alexander (1670), remoteschach.de, 2006.

4.e3 a4? 5.Bb5+– e5 (5...Nf6 6.Nc3+–) 6.Bc6 dc6 7.Be5 Bd6?? (7...Nf6+–) 8.Bg7 Qg5 9.Qf3 (better is 9.Bh8 Qg2 10.Qf3+–) 9...Bb7?? (better is 9...Qg7 10.Qc6 Kd8=) 10.Bh8+– 0–0–0 (10...Rb8 11.e4+–) 11.Bc3 (11.e4 c5+–) 11...Ne7 (11...c5 12.Qh3 Kb8 13.Nf3+–) 12.Qh3 (12.e4 c5 13.Bf6 Qh6+–) 12...Kb8 13.Nf3 Qd5 (13...Qg6 14.0–0+–) 14.Qg4 (better is 14.Qh7!? c5+–) 14...f5 (14...Rg8 15.Qh4+–) 15.Qd4 Qb5 16.Qd3 Qb6 17.Qe2 Ba6 18.d3 Nd5 19.Bd4 c5 20.bc5 Bc5 21.Bc5 Qb2 22.Bd4 Nc3 23.Bc3 Qb5 24.0–0 f4 25.ef4 Qd7 26.Nbd2 Rg8 27.Rfe1 Qh3 28.g3 Bb7 29.Rab1 Kc8 30.Rb7! Kb7 31.Qe4 Kc8 32.Qa8 Kd7 33.Qg8 (33.Qg8 Kd6 34.Nc4 Kc6 35.Qa8 Kb5 36.Rb1 Kc5 37.Bd4; 33.Ne5 Ke7 34.Ng4 Kf7 35.Qd5 Kg6 36.Qg8 Kh5 37.Re5) 1–0. Valpa – Dc, playchess.de, 2003.

4.e3 Rb8=.

4.e4 ab4 5.Bb5 Bb7 6.Nf3 e5 (6...Nf6 7.d3) 7.ab4+/– Nb4 (7...Ra1 8.Ba1 Nb4 9.Ne5+/– (9.Be5?! Be4 10.Na3 Qa8=)) 8.Ra8 Ba8 9.Ne5 (9.Be5?! Be4 10.Na3 Qa8=) 9...Nf6 10.c3 Nc6 (10...Qb8!? 11.Bc4 Nbd5) 11.Bc6+– Bc6 12.Qb3 Qe7?? (better is 12...Qa8 13.Qf7 Kd8 14.Nc6 Qc6+–) 13.Qb8 Qd8 14.Qd8 Kd8 15.Nf7 Ke7 16.Nh8 g5 17.Ba3 Ke8 18.f4 gf4 19.Bf8 Kf8 20.Rf1 Nh5 21.g4 Ng7 22.d4 Be4 23.Rf4 Kg8 24.Re4 Kh8 25.Re7 Kg8 26.Rd7 Ne6 27.d5 Nf4 28.c4 Nd3 29.Ke2 Nf4 30.Ke3 Ng2 31.Ke4 Nh4 32.c5 Ng6 33.Rc7 Nf8 34.c6 (34...Kh8 35.d6+–) 1–0. woschkat – dgall, net–chess.com, 2000.

4.e3 ab4

5.ab4 Ra1 6.Ba1 Nb4 7.Bb5 Bb7 8.Nf3 c6 (8...Bf3 9.gf3 e6 10.Rg1=) 9.Be2+= Qa5 10.Bc3 e6 11.0–0 Nf6 (11...Qa4 12.Ne1+=) 12.d3 (12.Bf6 gf6 13.c3 Na6+=) 12...Nfd5 (12...Be7 13.Nbd2=) 13.Bd2+= Qa2 (13...Qa4 14.e4 Nc7 15.Bf4+=) 14.c4 Nf6 15.Nc3 Qb2?? (better 15...Qa5+=) 16.Qa4+– c5 (16...Qc2 17.Qa7 Nd3 18.Qb7+–) 17.Rb1 Qc2 18.Qa7 (better 18.Qc2 Nc2 19.Rb7+–) 18...Bf3=+ 19.Qb8?? (19.Rb4 Bd6 20.Rb1 Be2 21.Qa8 Ke7 22.Qh8 Qd2 23.Ne2 Qd3 24.Re1–+) 19...Ke7–+ 20.Nb5?? (20.Bf3 Qd2 21.Nb5–+) 20...Qb1 (20...Qd2?! 21.Qd6 Ke8 22.Qb8 Ke7 23.Qd6 Kd8 24.Qc7 Ke8 25.Qb8 Ke7=; 20...Be2?! 21.Qd6 Ke8 22.Qb8 Ke7 23.Qd6 Ke8 24.Qb8 Ke7=) 21.Bf1 Bc6 (better 21...Nc6 22.Qd6 Ke8–+) 22.Qd6= Ke8 23.Qb8 Ke7 24.Qd6 Ke8 25.Qb8 Ke7 26.Qd6 ½–½. GuestLDGD – GuestSTTS, freechess.org, 2017.

5.ab4 Ra1 6.Ba1 Nb4 7.Bb5 c6 8.Be2 Qa5 9.Nc3?? (better 9.Bb2=) 9...Na2 (better 9...Qa1! 10.Qa1 Nc2 11.Kd1 Na1–+) 10.Na2+– Qa2 11.Nf3 Nf6 12.0–0 Ng4 (12...e6!?+–) 13.h3 Nf2?? (better 13...Nf6+–) 14.Kf2 f6 15.Nd4 (15.Qb1 Qb1 16.Rb1 d5+–) 15...Ba6 (15...e5 16.Nf3+–) 16.Kg1 (16.Ba6 Qa6 17.Qg4 e5+–) 16...Be2 17.Qe2 (better 17.Ne2 g6 18.Nc3+–) 17...g5 (17...e5 18.Nf3 Qc2 19.Be5+–) 18.Qh5 (better 18.Bc3 h5 19.e4 g4 20.hg4 e5+–) 18...Kd8 (18...Qf7 19.Qd1+–) 19.Nf5 (better 19.Bc3 Qd5 20.Ra1 Bg7+–) 19...Qc2 (19...e5+–) 20.Bc3 h6 (20...Bg7 21.Ba5 Kc8 22.Qf7+–) 21.Qf7 (21.Ba5 Kc8 22.Qe8 Kb7 23.Qd7 Ka6 24.Ra1 Qe4 25.Nd4 Qg2 26.Kg2 e6 27.Bb4 Kb6 28.Qc6) 21...e6 22.Qf6 Be7 23.Qe7 Kc7 (23...Kc8 24.Nd6 Kc7 25.Ba5 Kb8 26.Qd7 Qb2 27.Bc7 Ka7 28.Qc6 Qb4 29.Ra1 Qa4 30.Ra4) 24.Nd4 (24.Be5 Kc8 25.Qd6 Kb7 26.Qb4 Ka6 27.Ra1 Qa2 28.Ra2) 24...Qa2 (24...Qd3 25.Rf7 Kb6 26.Qd7 Qb1 27.Kh2 Qh1 28.Kh1 Ra8 29.Qc6) 25.Rf7 Qb1 (25...Qa1 26.Ba1 Rd8 27.Ne6 Kc8 28.Qd8 Kb7 29.Nc5 Ka7 30.Rd7) 26.Kh2 (26.Kf2 Kb6 27.Qd7 Qf5 28.Nf5 ef5 29.Qa7 Kb5 30.Rb7 Kc4 31.Qd4) 26...Rd8 (26...Qb8 27.Qd7 Kb6 28.Kh1 Rc8 29.Qe6 g4 30.Qb3 Kc5 31.Rf5 Kd6 32.Rf6 Kc7 33.Ba5 Qb6 34.Rf7 Kb8 35.Qb6 Ka8 36.Qb7) 27.Ne6 Kb6 (27...Kb7 28.Qd8 Qb6 29.Nc5 Ka7 30.Rd7 Qc7 31.Qc7 Ka8 32.Qb7) 28.Qd8 Ka6 (28...Kb5 29.d3 Qd3 30.Qa5 Kc4 31.Qb4 Kd5 32.Nc7) 29.Nc5 (29.Qa5 Kb7 30.Rd7 Kb8 31.Qd8) 29...Kb5 30.Qb8 (30.Qa5 Kc4 31.d3 Qd3 32.Qb4 Kd5 33.Rd7) 30...Kc5 31.Qb1 g4 (31...Kd6 32.Rf6 Ke7 33.Qb8 d5 34.Qd6 Ke8 35.Rf8) 32.Rf6 (32.Qb4 Kd5 33.Rd7 Ke6 34.Qg4) 32...gh3 (32...Kc4 33.hg4 h5 34.Rd6 c5 35.Qc2 hg4 36.Qa4) 33.Qb4 Kd5 34.e4 1–0. GuestLDZD – GuestKQPZ, freechess.org, 2019.

5.ab4 Ra4? 6.Ra4+/– ba4 7.b5 Nb4 8.Nc3 e5 (8...Bb7 9.Na4 e6 10.Nc5 Bg2 11.Ne6 fe6 12.Bg2+=) 9.Na4+/– e4 10.c3 Nd3 11.Bd3 d5?? (better is 11...ed3 12.Nf3 d5+/–) 12.Be2 Qg5 13.f3 (better is 13.Bf1+–) 13...Qg2–+ 14.d3 ed3 15.Bd3 Qh1 16.Kd2 Nf6 17.h3 Qh2 18.Kc1 Bd6 19.f4 (19.c4 Qf2 20.e4 de4 21.fe4 Ne4–+) 19...d4 (better is 19...Qf2!? 20.Kb1–+) 20.cd4 Nd5 (20...Bh3?! 21.Nh3 Qh3 22.Kd2–+) 21.Qe1 Nb4 (21...Bb4!? 22.Nf3 Qg2 23.Qe2 Bh3 24.Nc5–+) 22.Be2 Bf5 23.h4? (better is 23.Nc5–+) 23...Nd3 24.Bd3 Bd3 25.Qd1 0–0 26.Qd3 Qg1 27.Kc2 Qf2 28.Kb3 Qh4 29.Nc3 Ra8 30.Qe4 Rb8 31.Qd3 g6 32.Ba3 Ba3 33.Ka3 Qe1 34.Kb4 c6 35.Kc4 cb5 36.Nb5 Rc8 37.Kd5 Qh1 38.Qe4?? Qh5 39.Qe5 Qh1 40.Kd6?? Qc6 (40...Qc6 41.Ke7 Re8) 0–1. Valpa – Dc, playchess.de, 2004.

5.ab4 Ra4? 6.Ra4+/– ba4 7.b5 Nb4 8.c4 e5? (better is 8...Bb7!?+=) 9.Be5+/– Na2? (better is 9...Bb7 10.f3 Qa8+/–) 10.Qa4+– Nc1 (10...Nb4+–) 11.Qc2 Qe7 (11...f6 12.Bc3+– (12.Qc1?! fe5 13.Qc3 Qe7+–)) 12.Bb2 (12.Bc7 d5 13.b6 Qb4 14.Qc1 dc4 15.Bc4 Bc5+–) 12...Qg5 (12...Na2 13.c5! Bb7 14.Qb3+–) 13.Qc1 Bb4 (13...Bb7 14.Nh3 Qd8 15.Nf4+–) 14.Nf3 Qg4 15.h3 Qe4 (15...Qg6 16.Bd3! Qh6 17.c5+–) 16.Nc3 (better is 16.Bg7 Bb7+–) 16...Qf5 (16...Bc3 17.Qc3 Qb1 18.Bc1+–) 17.Nd5 Bd6 18.Bg7 Bb7 19.Bh8 c6 20.Be2 cd5 21.cd5 f6 22.Bc4 Ne7 23.Qc3 Be5 24.Qb3 d6 25.Ne5 Qe5 26.Qd3 Ng6 27.Bf6! Qf6 28.0–0 Ne5 29.Qe2 Qg5 30.f4 Qh4 31.fe5 de5 32.Qf3 Qc4 33.Qf8 Kd7 34.Rf7 1–0. Valpa – Dc, playchess.de, 2005.

5.ab4 Ra4? 6.Bb5?! Rb4 7.Bc6 Rb2=.

5.ab4 Na5?? 6.ba5+– Ra6 (6...c6+–) 7.Bb5 Re6 (7...Ra8 8.a6+–) 8.a6 Nf6 9.a7 (9.Bd4 Ne4+–) 9...Bb7 10.Nf3 Ne4 11.0–0 g5 (11...Qa8 12.Ne5 Nf6 13.Bc4 Bg2 14.Be6 fe6 15.c4+–) 12.Qe2 (better 12.Bh8 Rb6 13.Qe2 Nd6+–) 12...g4 (12...Rg8 13.Ne5 Nf6 14.Bc4+–) 13.Nd4 (better 13.Bh8 gf3 14.Qf3+–) 13...Nc3 (13...Rb6 14.Ne6! fe6 15.Bh8 Qa8+–) 14.Nc3 (better 14.Bc3 Rb6 15.Qg4 Ba8+–) 14...Rf6 (14...Rd6 15.Nf5 Rg6 16.Nd5 Bd5 17.Bh8+–) 15.Qg4 (better 15.Bd7 Qd7 16.a8Q Bc8+–) 15...e6 16.Ra4 (better 16.Qg5 Ba8 17.Ne4 Rg6 18.Qd8 Kd8+–) 16...Rg8 (16...Rg6 17.Qh3 Bg2 18.Qg2 Rg2 19.Kg2 Qa8 20.f3 Bg7+–) 17.Qg8 Rg6 18.Qg6! (18.Qh7?? Rg2 19.Kh1 Rg1 20.Kg1 Qg5) 18...h6 (18...fg6 19.Ne6 Combination; 18...hg6 19.Be2 Combination) 1–0. GuestWNPZ – GuestYYFV, freechess.org, 2017.

5.ab4 Ba6 6.c3+= Na7?? (6...Ne5 7.Na3 Nc4 8.Nc4 bc4 9.Nf3+=) 7.Nf3 (7.Ra6 e5+–) 7...d6?? (7...Bb7 8.Na3+=) 8.Na3 (better 8.Ra6 Qc8 9.Ra5+–) 8...c6 9.c4 (9.d4 e6+=) 9...Nf6 (9...e5 10.cb5 Nb5 11.Nb5 Bb5 12.Bb5 cb5 13.0–0+–) 10.cb5+– Bb5 11.Nb5 cb5 (better 11...Nb5!? 12.Bb5 cb5+–) 12.Bd4 (12.Ra5 e5+–) 12...Qb8 13.Ba7 Ra7 14.Ra7 Qa7 15.Bb5 Nd7 16.0–0 e6 17.Qa1 Qb7 18.Qa4 (18.Rc1 Be7 19.Bc6 Qc7 20.Qg7 Rf8+–) 18...Be7 (18...Ke7 19.Rc1 Ne5 20.Ne5 de5 21.Bc6+–) 19.Bc6 Qc7 20.Nd4 (better 20.Qa8 Bd8 21.Ra1+–) 20...0–0? (20...Qd8+–) 21.Bd7 e5 (21...Rb8 22.Ra1 Bf8 23.Qc6+–) 22.Nf3 (22.Nf5 Bf6+–) 22...f6 (22...e4 23.Nd4+–) 23.Be6 (23.Rb1 Rb8+–) 23...Kh8 24.Qb3 (24.b5 Rb8+–) 24...Rd8 (24...Rb8 25.d4+–) 25.Bd5 (25.d4 Rb8+–) 25...Rb8 (25...f5 26.Rb1+–) 26.b5 (26.e4 g6+–) 26...Qc5 (26...Qb6 27.Bc6+–) 27.Bc4 (better 27.Rb1!? Qc8+–) 27...d5 28.Be2 (28.Bd5?! Rb5 29.d4 Qd5 30.Qd5 Rd5+–) 28...h5 (28...Qd6 29.Rc1+–) 29.Rb1 (29.d4 Qd6+–) 29...Bd8 (29...g6 30.d4 Qd6 31.de5 fe5 32.e4+–) 30.g3 (30.d4 Qd6 31.de5 fe5+–) 30...Bc7 (30...Bb6 31.d4 Qd6 32.Qc3+–) 31.Nh4 (31.d4 Qd6+–) 31...e4 (31...Bb6 32.Bh5 Qd6 33.Nf5+–) 32.Kg2 (32.Ng6 Kh7 33.d4 Qd6+–) 32...g5 (32...d4 33.Qe6 d3 34.Bd1+–) 33.Nf5 Kh7 (33...g4 34.d4 ed3 35.Qd3+–) 34.Nd4 (better 34.Rc1! Qa7 35.Qd5 Bb6+–) 34...h4 (34...Bb6 35.d3 Qd6 36.de4 Bd4 37.ed4+–) 35.Ne6 Qd6 36.Nc7 Qc7 37.Qb2 (better 37.Qd5 Qe7+–) 37...Qd6 (37...Qb6 38.Qa3+–) 38.Qd4 Rb6 (38...Rb7 39.d3 hg3 40.fg3+–) 39.Ra1 (39.d3 f5+–) 39...Kg6 40.Ra7 (better 40.Ra6 Ra6 41.ba6+–) 40...Rb5 (40...Qe6+–) 41.Bb5 Qc5 (41...Qe5+–) 42.Qc5 d4 (42...Kh5 43.Be8 Kg4 44.h3 Kf5 45.Qd5) 43.ed4 (43.Be8 Kh6 44.Qf8) 43...e3 (43...Kh6 44.Qf5 h3 45.Qh3 Kg6 46.Qh7) 44.de3 (44.Be8 Kh6 45.Qf8) 44...f5 (44...h3 45.Kf1 Kh6 46.Qf5 g4 47.Rh7) 45.Be8 Kf6 46.Qc6 (46.Qd6) 1–0. GuestNMFD – GuestVFKM, freechess.org, 2016.

5.Bb5 ba3 6.Na3 Bb7 7.Nf3 Nf6 8.Nc4 (8.0–0 e6+=) 8...Ra1= 9.Qa1 (9.Ba1 e6=) 9...Nb4 10.Ba4 Bf3 11.gf3 Qb8 12.Bb3 Qb7 13.Ke2 g6?? (better is 13...c6=) 14.Bf6+– ef6 (14...Rg8 15.Be5 Nc6+–) 15.Qf6 Rg8 16.Nd6!! Bd6 17.Bf7 Kf8 18.Bg6 1–0. Fournier,Frederic – Salaun,Rene, Active Game France (FRA), 1996.

5.Bb5 Rb8 6.Bc6 dc6 7.ab4 Rb4 8.Bc3 Rc4 (8...Rb8 9.Nf3+=) 9.Na3 (9.Nf3 Rc5+–) 9...Rc3? (better 9...Rg4=) 10.dc3+– Bg4?? (10...Qd1 11.Kd1 Nf6 12.Nc4+–) 11.Qd8 (better 11.Qg4 e6 12.Qa4+–) 11...Kd8 12.Nc4 Be6 (12...Nh6 13.Na5+–) 13.Ra8 Kd7 14.Ne5 (14.Rf8?! Bc4 15.Nf3 Ke6+–) 14...Kd6 15.Ngf3 (15.Rf8?! Ke5 16.Nf3 Kf6+–) 15...f6 (15...Nf6 16.0–0 Kc5+–) 16.Rd8 Kc5 17.Nd3 (17.Nd3 Kc4 18.Kd2 Bd7 19.Ra1 Kd5 20.Ra5 Ke6 21.Rf8 g5 22.c4 c5 23.Ng5 Kf5 24.Nf7 Kg6 25.Raa8 Bc6 26.Nh8 Kf5 27.Ra5 Nh6 28.Rc5 Kg4 29.h3 Kh4 30.Nf4 e5 31.g3 Kg5 32.Ne6 Kf5 33.Ng7 Ke4 34.Ke2 Nf5 35.f3) 1–0. GuestBGGS – GuestKXVV, freechess.org, 2017.

3.a3 Bb7

4.c4 bc4=+ 5.d3 (5.e4 d5=) 5...cd3 6.Qd3 Nf6 7.Nd2 g6 8.g3?? (8.Nb3 e6=+) 8...Bg7 (better 8...Nb4 9.ab4 Bh1–+) 9.Bg2?? (9.Ngf3=+) 9...d5 (better 9...Nb4 10.ab4 Bg2–+) 10.Bf6 Bf6 11.Rc1 e6 (11...Rb8 12.Qd5 Qd5 13.Bd5 Nd4 14.Bb7 Rb7=) 12.Ngf3?? (12.Qb5 Rb8 13.Rc6 Bc6 14.Qc6 Kf8+–) 12...Ne7?? (12...Qd6 13.0–0=+) 13.0–0?? (better 13.Qb5 Bc6 14.Rc6 Nc6 15.Qc6 Ke7 16.0–0+–) 13...0–0=+ 14.a4 (14.Nb3 Rb8=+) 14...Rc8 (14...Qd6 15.Qc2 Rac8 16.Rfd1–/+) 15.b5 (15.Nb3 e5 16.Qd2 Rb8=+) 15...c6 (15...c5 16.Rfd1–+) 16.Nd4 (16.e4 c5 17.Qe3 Qb6–/+) 16...cb5 (16...c5 17.N4f3–+) 17.Nb5 a6 18.Na7?? (better 18.Rc8 Nc8 19.Nd4–/+) 18...Rc1 (18...Ra8 19.Nb5 ab5 20.ab5–+) 19.Rc1 Nc8 (better 19...Qb6 20.Nb5 ab5 21.Qb5 Qa6–+) 20.Nc8–/+ Bc8 21.Nf3 (21.Nb3!?–/+) 21...Qa5–+ 22.Qb1 (22.e4–+) 22...Qa4 23.Rc7 a5 24.Bf1 (24.Ra7 Qc4–+) 24...Qa3 (24...Ba6 25.Ra7 Qc6 26.h3–+) 25.Ra7 (25.Qc2 Ba6–+) 25...a4 (25...Qc5 26.Ra8–+) 26.Qd1 (better 26.Qb5–+) 26...Bd7?? (better 26...Qb3 27.Qc1 Bc3–+) 27.Ra4?? (better 27.Rd7 Ra8 28.Rc7+=) 27...Ba4–+ 28.Qd3 (28.Qd2 Rc8–+) 28...Qa1 (28...Qd3 29.ed3 Rb8 30.Kg2–+) 29.Nd2 Bd1 (29...Rc8 30.Qa6 Rc1 31.e4–+) 30.Kg2 Bc3 (30...Rc8 31.e3–+) 31.Qe3 (31.Nb1 Be5–+) 31…Bd2 (31...Bd2 32.Qd2 Rb8–+) 0–1. Agiant – ThatChescalatedQuick, lichess.org, 2020.

4.e3 d5? 5.Bb5+– a6 6.Be2 (6.Ba4 f6+–) 6...e5+/– 7.Nf3 e4 8.Nd4 Nd4 9.Bd4 Nf6 10.0–0 Be7 11.c4 dc4 12.Bc4 0–0 13.Nc3 Bc8 14.Qc2 Bd6 15.Ne4 Ne4 16.Qe4 Re8 17.Qa8 Bb7 18.Qa7 Ba8 19.Qa6 Qg5 20.g3 Qh5 21.Be2 Qh3 22.f3 Re6 23.Qa8 Bf8 24.Rf2 Rh6 25.Bf1 Qf5 26.Bc5 (26.Bc5 Rd6 27.Bd6 cd6 28.Rc1+–) 1–0. Fournier,Frederic (1650) – ocaja (1640), Active (3/2), 2005.

4.e3 e5 5.Nf3 d6 (better is 5...e4 6.Ng1 Qg5=) 6.Bb5+/– e4 (6...a6 7.Bc4+/–) 7.Nd4 Qd7 (7...Nge7 8.Nc3 d5 9.Qh5=) 8.c4 (8.Bc6 Bc6 9.Nc3 a6+/–) 8...a6 9.Ba4 Nf6 10.Nc3 (better is 10.Nc6 Bc6 11.Bc6 Qc6 12.Bf6 gf6 13.Qc2+–) 10...d5 11.Qc2 0–0–0 12.cd5 Nd5 13.Ne4 Nde7 14.Rc1 (14.Nc5 Qg4 15.Nb7 Nd4 16.Bd4 Qg2 17.Nd8 Qh1 18.Ke2 Qh2 19.Nc6=) 14...Qg4 (14...f5 15.Nc6 Nc6 16.Bc6 Bc6 17.Qc6 Qc6 18.Rc6 fe4+–) 15.Nc6= (15.Bc6 Nc6 16.Nc6 Qg2 17.Ne7 Kd7 18.Qa4 Ke7 19.Rc7 Ke6=) 15...Bc6 16.Bc6 Nc6 (16...f5 17.Bb7! Clearance: c6 17...Kd7 18.Qc7 Ke8 19.Nd6 Rd6 20.Qd6 Qg6=) 17.Qc6 Qd7 18.Qa8 1–0. Wilke,Hans Peter – Schunk,Simon, Berlin op 7th, 2002.

4.e3 f6 5.Bb5 Ne5 (better 5...Nb4!? 6.f3 Nd5=) 6.Qh5 g6 7.Qh3 c6 8.Be2 Bg7 (8...a5 9.ba5 Ba6 10.Ba6 Ra6 11.Bc3+–) 9.d4+– Nf7 10.Nf3 Ngh6 (10...a5 11.0–0+–) 11.0–0 0–0 12.Nbd2 g5 (12...d5 13.e4+–) 13.Ne1 (13.Qh5 d6+–) 13...g4 (13...e5 14.Nd3+–) 14.Bg4 Ng4 15.Qg4 Nh6 16.Qh3 d5 17.e4 Bc8 18.Qg3 Kh8 (18...f5 19.e5+–) 19.Qc3 Bb7 (19...Qd6 20.Nd3+–) 20.Nd3 Rg8 21.Nc5 Qc8 (21...Bc8 22.Rfe1+–) 22.Rfe1 Qg4 (22...e5+–) 23.Nb7 Bf8 (23...f5 24.f3 Qg6 25.Re2+–) 24.g3 (24.Qf3 Qf3 25.Nf3 Nf7+–) 24...Qh3 (24...Rc8 25.Nc5+–) 25.Nc5 (25.Na5 Rc8+–) 25...Ng4 26.Nf3 de4 (26...Rg6 27.ed5 cd5 28.Qb3+–) 27.Re4 f5 (27...e5 28.de5 Ne5 29.Ne5 fe5 30.Re5+–) 28.d5 Bg7 (28...e5 29.de6 Bg7 30.Rg4 fg4 31.Ne5+–) 29.Re7 Bc3 (29...Qh6 30.Rg7 Rg7+–) 30.Bc3 Rg7 31.Rg7 h5 32.Ra7 Kg8 33.Ra8 Kh7 34.Ng5 Kg6 35.Rg8 Kh6 36.Nf7 Kh7 37.Rg7 1–0. GuestVRKP – GuestHBTG, freechess.org, 2019.

4.e3 Nf6 5.Nf3 g6 6.Bb5 Bg7 7.0–0 0–0 8.c4 a6 9.Ba4 Re8 10.d3 e6 11.Nbd2 Na7 12.e4 (12.Nb3 Bc6 13.Nc5 Qc8+–) 12...Nc8 (12...Ne4 13.Bg7 Nd2 14.Qd2 Kg7 15.Ne5+/–) 13.h3 (13.Nb3 Nb6 14.Na5 Qc8+–) 13...Nb6 (13...Ne4 14.Bg7 Nd2 15.Nd2 Kg7 16.Ne4+=) 14.Bc2 (14.Bd4 Na4 15.Qa4 d6+/–) 14...d6? (14...Ne4 15.de4 Bb2 16.Rb1+=) 15.a4 (15.d4 a5+–) 15...Nbd7? (better is 15...Ne4!? 16.Bg7 Nd2 17.Nd2 Kg7=) 16.Nb3 c6 (16...c5 17.b5+/–) 17.Na5 Rb8 18.Nb7 Rb7 19.Ba3 h6 20.Rb1 Qc7 21.b5 (21.d4!?+–) 21...cb5 22.ab5 ab5 23.Rb5 Reb8 (23...Rb5 24.cb5 Ra8 25.Bb4+=) 24.Rb7+/– Rb7 25.Nd4 Nc5 26.Nb5 Qb6 27.Qf3 d5 28.ed5 ed5 29.Qe3 Ncd7 30.Qb6 Nb6 31.c5 Nc8 32.Rb1 Ne7 33.Nd4 Rb1 34.Bb1 Nd7 35.Nb3 Nc6+/– 36.f4 d4 37.Kf2 f5 38.Ba2 Kf8 39.Nd2 Ke8 40.Bc4 Kd8 41.Bf7 g5 42.fg5 hg5 43.Be6 Ne7 44.Nc4 f4 45.Kf3 Ne5 46.Ne5 Be5 47.Ke4 Bf6 48.Bb2 Nc6 49.Bd5 Ne7 50.Bd4 Bd4 51.Kd4 Nf5 52.Ke5 Ne3 53.d4 Kc7 54.Bf3 1–0. Hal1958 – HOTSUN, playchess.de, 2004.

4.e4 a6+=.

4.e3 a6=

5.c4 bc4 6.Nf3 a5 =+.

5.Nf3 e6 6.Be2 Nf6 7.0–0 Bd6 8.Nd4 0–0 9.Bf3 Re8 10.Nc6 dc6 11.d4 e5 12.de5 Be5 13.Be5 Re5 14.Qd8 Rd8 15.Nc3 h6 16.Rad1 Rd1 17.Rd1 (< 17.Bd1 c5=+) 17...Re8 18.Re1 Re6 19.a4 Bc8 20.Rd1 Rd6 21.a5 Bg4? 22.Bg4 Ng4 23.Rd6 cd6 24.Ne4 d5 25.Nd6?? Ne5= 26.f4 Nd7 27.Kf2 Kf8 28.e4 Ke7 29.Nf5 Kf6 30.Ng3 de4 31.Ne4 Kf5 32.Kf3 g5 33.fg5 hg5 34.g4 Kg6 35.Nd6 Ne5 36.Kg3 Nd7 37.c4 bc4 38.Nc4 f5 39.Kf3 f4 40.h3 Nb8 41.Ne5+= Kf6 42.Ke4 Ke6 43.Nc4 Nd7= 44.Nb6 Nf6 45.Kd4 Nd5?? 46.Nd5+– cd5 47.b5 Kd7 48.ba6 Kc7 49.Kd3 Kb8 50.Ke2 Ka7 51.h4 gh4= 52.g5 h3 53.Kf2 d4 54.g6 d3 55.g7= h2 56.Kg2 d2 57.g8Q h1Q 58.Kh1 d1Q 59.Qg1 Qg1 60.Kg1 Ka6 ½–½. Pieleck,Rudi – Ritschel,Stephan, RSX9E – A00 – Sokolsky–1, 2002.

5.Nf3 Nf6 6.c4 bc4 7.Bc4 d5 8.Be2 e6 9.0–0 Bd6 10.d4 0–0 11.Nbd2 Qe7 12.Qc2 a5 13.b5 Na7 14.a4 c6 15.bc6 (better is 15.Rfb1!?+=) 15...Nc6+= 16.Rfc1 Rfc8 17.Qb3 Bb4 (17...Rc7 18.Ne5+=) 18.Ba3= Ba3 19.Ra3 (19.Qa3 Qa3 20.Ra3 Nb4=) 19...Rab8 20.Qa2 Ba8 (20...Nb4 21.Qb2=) 21.Rac3+= Bb7 ½–½. Fournier,Frederic – Fournier,Jean_Noel, Active Game France (FRA), 1994.

5.Nf3 h6 6.c4 bc4 7.Bc4 a5+–.

5.Nf3 h6 6.d4 d5 7.Nbd2 Nf6 8.Bd3 e6 9.Nb3 Bd6 10.Nc5 Bc8 11.Ne5 Be5 (11...Bc5 12.dc5 Ne5 13.Be5+=) 12.de5+/– Nd7 13.Nd7 Qd7 14.0–0 0–0 15.Qg4 Ne7 16.e4 (16.Bd4 Nf5+/–) 16...d4+= 17.f4 Nc6 18.Rf3 Kh8 (18...f6 19.ef6 Rf6 20.e5+/–) 19.Rg3 f5 20.ef6 Rf6 21.e5 Rf5? (Better is 21...Rf7!?+/–) 22.Bf5+– ef5 23.Qf3 Qe6 (Better is 23...Bb7+–) 24.Rd1 Bb7 25.Qh5 Kh7? 26.Qe2 Rd8 27.Rgd3 Ne7? 28.Rd4 Rd4 29.Bd4 Bd5 30.Bc5 Ng6 31.Qf2 a5 32.Rd2 Qc6 33.h4 Nh8 34.Bd4 Nf7 35.Bc5 Qa8?? 36.Qd4 Be6 37.Rd3 h5 38.Rg3 Qe4 39.Qe4 fe4 40.Kf2 g6 41.Be7 c6 42.Rc3 Bd5 43.Bg5 Kg7 44.Ke3 Kf8 45.Kd4 Ke8 46.Rg3 Kd7 47.Kc5 Ke6 48.Kd4 Kf5?? 49.Ke3 Bc4 50.Kd4 Bd5 51.a4 Ke6 52.ab5 cb5 53.Ra3 Ng5 (53...a4 54.c4 Bc4 55.Ke4 Bd5 56.Kd4 Bg2 57.Rc3+–) 1–0. Semenko,Georg(Jurko) – Franz,Irma, 6sen.BayEM Schney, 1994.

5.Nf3 h6 6.d4 Nf6 7.c4 bc4 8.d5+/–.

3.a3 Nd4??

4.Bd4+– h5 (4...a5 5.e3+–) 5.e3 h4 (5...Bb7 6.Nf3+– (6.Bb5 Bg2 7.Nc3 Bh1–/+)) 6.h3 Rh5 7.Qh5 g6 8.Qh4 f6 9.Bd3 g5 10.Bg6 1–0. Fournier,Frederic (1820) – chino1961 (1630), Active (5/0), 2005.

4.e3 Nc2? (better 4...Ne6+–) 5.Qc2+– c6 6.Nf3 Bb7 7.Be2 Qc7 (7...Nf6 8.0–0+–) 8.0–0 (better 8.Bb5 a5+–) 8...0–0–0 (8...Qd8+–) 9.d4 (9.a4 f6+–) 9...d6 10.Bb5 (10.Rc1 e6+–) 10...e6?? (better 10...cb5 11.Qd3 Bd5+–) 11.Rc1 Qb6 (11...Kd7 12.e4 Rc8 13.Bd3+–) 12.Bc6 Bc6 13.Qc6 (13.d5!? ed5 14.Nd4 Ne7+–) 13...Qc6 14.Rc6 Kd7 (14...Kb7 15.Rc2+–) 15.Rc1 (15.Ra6!? Ra8+–) 15...Be7 16.Nc3 Nf6 17.Nd2 (17.Nb5 a6 18.Rc7 Ke8+–) 17...Rdg8 18.Nde4 Ne4 19.Ne4 f5 20.Nd2 g5 (20...Bf6 21.Rc2+–) 21.Nc4 (21.d5!? e5+–) 21...h5 (21...Bf6 22.d5 Bb2 23.de6 Ke6 24.Nb2+–) 22.Na5 Ke8 (22...Bf6 23.Nc6 Ra8 24.Rc3+–) 23.Rc8 (23.Rc7 Bd8 24.Ra7 Ba5 25.Ra5 d5+–) 23...Kf7 (23...Kd7 24.Rc6 Bd8 25.d5+–) 24.Rg8 (24.Rc7!? Rc8 25.Rac1 Rc7 26.Rc7 a6+–) 24...Rg8 25.Rc1 g4 (25...Bd8 26.Nc6 a6 27.Nd8 Rd8 28.Rc7 Ke8 29.d5 ed5 30.Bf6+–) 26.Rc7 h4 (26...a6 27.Nc6 Re8 28.Ra7+–) 27.Nc6 Kf6 (27...Re8 28.Ra7 d5 29.b5+–) 28.Ne7 (better 28.d5 e5 29.Re7+–) 28...g3 (28...Rg7 29.d5 e5 30.Be5 de5+–) 29.Ng8 Kg6 30.d5 gh2 31.Kh2 h3 32.Kh3 (32.Rg7 Kh5 33.Bf6 hg2 34.Rg5 Kh4 35.Rf5 Kg4 36.Nh6) 32...Kh5 (32...a6 33.Rg7 Kh5 34.Bf6 ed5 35.Rg5) 33.Rg7 e5 34.f3 (34.f4 ef4 35.ef4 a6 36.Rg5) 34...f4 35.ef4 ef4 36.Bc1 (36.Bf6 a6 37.Rg5) 36...a6 37.Bf4 a5 38.g4 1–0. BeepBeepImAJeep (2575) – carlodimarzio, lichess.org, 2018.

3.a3 d5

4.d4 a6 5.e3=.

4.d4 Bg4 5.Nf3 (5.f3 Bc8) 5...e6 6.e3 Nf6? (6...a6 7.Bd3=) 7.Be2 (better is 7.Bb5 Qd6 8.c4 dc4 9.h3+–) 7...a6= 8.h3 Bh5 9.g4 (9.0–0 Bd6=) 9...Bg6=+ 10.Ne5 (10.c3 Ne4=) 10...Ne5 11.de5 Ne4 12.h4 h6 (12...Be7 13.h5 Bh4 A) 14.hg6? Nf2 (< 14...Bf2 15.Kf1 fg6 16.Nd2) 15.gf7 Kf8–+; B) 14.0–0 Bf2 15.Rf2 Nf2 16.Kf2 Qh4 17.Kf1=+) 13.Rh3 (13.h5 Bh7=+) 13...Be7 14.f3?? (better is 14.Nc3–/+) 14...Bh4–+ 15.Kf1 Ng3 16.Kg2 Ne2 17.Qe2 h5 18.Nc3 hg4 19.fg4 Bh7 20.a4 c6 21.Bc1? Bg5 22.e4 Bc1 23.Rc1 Be4?? 24.Ne4 Rh3 25.Kh3?? de4–/+ 26.Qe4 Rc8 27.a5? Qd2 28.Rf1 Ke7 29.Qh7? Qe3 30.Kg2 Qe2 31.Rf2 Qg4 32.Kh1 Rd8 33.Kh2 Rd1 (34.Rg2 Qf4 35.Rg3 Rd2 36.Kh3 Qf1 37.Kh4 Rh2 38.Kg4 Rh7 39.Re3 Qg2 40.Rg3 Qe4 41.Kg5 Qf5) 0–1. bentengutama (1965) – reyr (2390), net–chess.com, 2003.

4.e3 a5 5.Bb5+– Bd7 6.Qf3 e6 7.c4 dc4?? (better 7...Nge7+=) 8.Bc6+– ab4 (8...Rb8+–) 9.Ba8 ba3 (9...b3 10.Bb7 Qg5 11.Nh3+–) 10.Ba3 (better 10.Na3 c3 11.Bc3 f6+–) 10...Bc5 (10...Bd6+–) 11.Bc5 Nf6 12.Bc6 (better 12.Bb7!? c3 13.Nc3 e5+–) 12...Nd5 13.Ra8 Bc6 14.Rd8 Kd8 15.Qf7 Re8 16.Qg7 Nb6 17.Qg5 (17.f3 Nd7+–) 17...Kd7 18.Nc3 Nd5 19.Qg7 Kd8 20.Nf3 Nc3 21.dc3 1–0. GuestVHVD – GuestHZMQ, freechess.org, 2017.

4.e3 a6 5.d3 e5 6.c4 dc4 7.Nf3 Bg4 8.h3 Bf3 (better is 8...Bh5!?=+) 9.Qf3+= Qf6 10.Be2 (better is 10.Qf6 Nf6 11.dc4+=) 10...cd3–/+ 11.Bd3 Qf3 12.gf3 Bd6 13.Be4 Nge7 14.Nc3 f5 15.Bc6 Nc6 16.Nd5 0–0 (16...a5 17.f4–/+) 17.e4? (better is 17.Rc1!? Nd8 18.Nc7=) 17...fe4 18.fe4 Rf4?? (better is 18...a5 19.Rc1 Nd4–/+) 19.Nf4+/– ef4 20.Rg1 Ne5 21.Ke2 Rf8 22.f3 Rf7 23.a4 c6 24.ab5 ab5 25.Ra8 Rf8 26.Ra6 Rc8 27.Bc3 Ng6 28.Rg4 Rc7 29.h4 Ne5 30.Rf4 Nd3?? (30...h6+–) 31.Ra8 (31...Rc8 32.Rc8 Bf8 33.Rff8; 31.Kd3?! Bf4 32.e5 Kf7+=) 1–0. cagey – Bullet, Live Game Caissa's Web, 2004.

4.e3 e5 5.Bb5 Bd7 6.Bc6 Bc6 7.Be5 Nf6 (7...a5 8.ba5 Nf6 9.Ne2+–) 8.Nf3 Be7 9.0–0 0–0 10.Qe2 a6 (10...Re8 11.Qd3+–) 11.Nc3 Ne4 (11...Qd7 12.Nd4+–) 12.Nd4 Bb7 13.Ne4 de4 14.c4 (14.Qg4 Bf6 15.Bf6 Qf6+–) 14...Bd6 (14...Qd7 15.d3+–) 15.Bd6 cd6 (15...Qd6 16.f3+–) 16.d3 Qg5 17.de4 Be4 18.f3 Bg6 19.Rad1 (19.e4 Rae8 20.Qd3 Qf4+–) 19...Rfe8 20.e4 Rac8 (20...f5 21.Nc6+–) 21.Nb3 (21.Qd3 Rc7+–) 21...Qe7 22.Qd3 Qc7 23.Na5 Rcd8 24.Qd5 Re5 25.Qc6 Qa7 26.Kh1 Re6 27.Qd5 Qe3 28.Qd3 Qb6 29.Qd5 Re5?? 30.Qb7+– Qe3 31.Nc6 Ree8 32.Nd8 Rd8 33.Qa6 Qf4 34.c5 d5 35.Rd5 Rd5 36.Qc8 (36...Rd8 37.Qd8) 1–0. agluis (2010) – reyr (2390), net–chess.com, 2003.

4.e3 Bf5? 5.Bb5+– Qd7 (5...Bd7!?+–) 6.Nf3 e6? (6...Bg4+–) 7.Ne5 Qd6 (7...Ne5 8.Bd7 Nd7+–) 8.Bc6 Ke7 9.Ba8 f6 (9...c5 10.Nc3 f6 11.bc5+–) 10.Nf3 Nh6 11.0–0 g5 12.h3 Bg7 13.d3 Ra8 14.Nbd2 g4 15.hg4 Bg4 16.g3 Nf5 17.Kg2 h5 18.Rh1 Rh8 19.Qe2 Bf3 20.Nf3 h4 21.Nh4 Qd8 22.Nf5 ef5 23.Rh8 Qh8 24.Rh1 Qg8 25.Qf3 Kd6 26.Qf5 Qf7 27.Rh7 Kc6 28.Bd4 Kb7 29.Qh5 Qh5 30.Rh5 Bf8 31.Rd5 Bd6 32.e4 1–0. Fournier,Frederic (1755) – 2 (1815), Active (3/0), 2004.

4.e4 a6 5.ed5 Qd5 6.Nc3 Qe6 7.Nge2.

4.e4 de4 5.Bb5+/– Bb7 6.Ne2 (6.Qg4 Nf6 7.Bf6 gf6 8.Qe4 Qd7) 6...e6 7.Nd4 (7...Qd5 8.0–0) 1–0. pcmvr (2225) – reyr (2145), net–chess.com, 2006.

4.e4 de4 5.Bb5+/– Bd7 6.Be2 (6.Qe2!? Rb8 7.Qc4+/–) 6...Nf6 7.d3 e5 8.b5 Nd4 9.Nd2 (9.Bd4!? ed4 10.de4+=) 9...Bb5= 10.de4 Be2 11.Ne2 Ne2 12.Qe2 Rb8 (better is 12...Bd6!?+=) 13.Be5+/– Bd6 14.Bd6 cd6 15.0–0 0–0 16.f3 Rb2 (16...Qb6 17.Qf2+/–) 17.Nc4 Rb8 18.Rfd1 Ne8 19.Ne5?? (better is 19.Rd5+–) 19...Qb6–+ 20.Kh1 (20.Qf2 de5 21.Qb6 ab6 22.Rd5–+) 20...de5 21.h3 Nf6 22.Kh2 g6 23.Rd2 Rbd8 24.Rd8 Rd8 25.Rd1 Qa5 26.Rd8 Qd8 27.Qf2 a5 28.Qe2 Qc7 29.Qb5 Qc3 30.Qb8 Kg7 31.Qd6 h5 32.Kg3 Ne4 (32...Ne4 33.Kh2 Nd6 34.h4 Nf5 35.Kg1 Qe1 36.Kh2 Qg3 37.Kg1 Ne3 38.c4 Qg2) 0–1. Valpa – Klm, playchess.de, 2006.

3.a3 d6

4.e3 e5 5.Bb5 Bb7 6.d4 ed4 7.Qd4 Qg5 8.Qe4 Nge7 9.Ba4 (9.Nc3 a6 10.Bf1 Nd8+/–) 9...Kd8 (9...f5!? 10.Nh3 Qg6+–) 10.Nh3+– Qg6 11.Qg6 hg6 12.0–0 Nf5 (12...f6 13.Nd2+–) 13.Ng5 Ke8 14.Bb3 f6 (14...Nd8 15.e4 Be7 16.ef5 Bg5 17.fg6+–) 15.Ne6 Kd7 16.Nf4 (16.Rd1 a6+–) 16...Rh6 17.Nd2 Be7 (17...Ne5 18.e4 Nh4 19.Be6 Ke7 20.Bd5+–) 18.Bd5 Rah8 19.h3 Nd8 20.Bb7 Nb7 21.e4 Nh4 22.g3 (better is 22.Nd5 g5 23.Nc4+–) 22...g5+= 23.gh4 gf4 24.Nf3 f5 25.ef5 Bh4 26.Bg7 Rg8 27.Kh2?? (better is 27.Nh4 Rg7 28.Ng6 Rh3 29.Kg2+=) 27...Rg7–+ 28.Rad1 Bf6 29.c4 (29.Rg1 Rg1 30.Rg1 Rh5–+) 29...Kc8 (29...Rgh7 30.Ng1–+) 30.Rde1 (better is 30.Rfe1–+) 30...Re7 (30...Rgh7 31.Kg2–+) 31.Re6 (31.Re7!? Be7 32.Re1–/+) 31...Nd8 (31...Reh7 32.Kg2–+) 32.Re7–/+ Be7 33.Re1 Bf6 34.Re2 (34.Re4!?–/+) 34...Rh5–+ 35.Re8 (35.h4 Rf5 36.Kh3 Nf7–+) 35...Kd7 36.Rf8 (36.Re4 Rf5 37.h4 Bb2–+) 36...Ke7 37.Rg8 Rf5 38.Rg4 Nc6 (38...Ne6 39.Kg2–+) 39.Kg2 Ne5 40.Ne5 de5 (40...Re5?! 41.Rf4 Re2 42.h4–+) 41.Kf3 (41.f3 Ke6–+) 41...Rg5 (41...Ke6 42.Rg8 Rh5 43.Kg2–+) 42.h4 (42.Rg5 Bg5 43.Kg4 e4–+) 42...Rg4 (better is 42...Rh5 43.Ke4–+) 43.Kg4 Kf7 44.h5 Ke6 45.f3? (better is 45.h6–+) 45...c6 (45...Bg7!? 46.Kg5–+) 46.a4? White intends b5 (46.h6 Kf7 47.Kf5 e4 48.Ke4 Kg6+=) 46...Bh8?? (better is 46...Bg7!?–+) 47.a5 (47.h6 Kf7=) 47...a6 (better is 47...Bg7!? 48.b5 cb5 49.cb5 Kd5–+) 48.b5 cb5 (48...ab5?? 49.a6 e4 50.a7 ef3 51.a8Q+–) 49.cb5 Kd6 (49...ab5?? 50.a6 e4 51.a7 ef3 52.a8Q+–) 50.ba6?? (better is 50.b6=) 50...Kc7–+ 51.a7 Kb7 52.a6 Ka7 53.Kf5 Ka6 54.Ke4 Kb6 55.Kd5 Kc7 56.Ke4 Kd6 57.h6 Ke6 58.h7 Kf7 59.Kf5 Bf6 60.Ke4 Kg6 61.Kd3 Kh7 62.Ke4 Kg6 63.Kd3 Kf5 64.Ke2 e4 65.fe4 Ke4 66.Kf2 Bd4 67.Ke2 f3 68.Ke1 Ke3 69.Kf1 f2 70.Kg2 Ke2 0–1. Mauron,Regis – Bot,Florian, 10e Tournoi de Nol, 2007.

4.e3 Bf5? 5.Bb5 Bd7 6.c4 Nf6 (6...a6 7.Ba4+–) 7.Nf3 e5 8.d4 ed4 9.Nd4 Nd4 10.Bd7 Qd7 11.Bd4 Be7 12.0–0 0–0 13.Nd2 c5 14.Bb2 a6 (14...Rab8 15.Bc3+–) 15.Qc2 (15.Qf3 Rab8+–) 15...h6 (15...Rfb8 16.Bc3+–) 16.Rad1 Qe6 17.Nf3 (17.Bf6 Bf6 18.Ne4 cb4 19.ab4 Be7+–) 17...Ne4 (17...Rfc8 18.Rc1+–) 18.Rd5 Rab8 19.Qa4 (19.Nd2 f5 20.Ne4 Qe4+–) 19...cb4 (19...Rb6!?+–) 20.ab4 (20.Nd4 Qc8 21.Nc6 Rb7 22.ab4 Rc7 23.Ne7 Re7+–) 20...Qc8 (20...Bf6 21.Bf6 Qf6 22.Rd4+–) 21.Rc1 Nc5? (better 21...Qb7 22.Qc2 f5+–) 22.bc5 Rb2 23.cd6 Bf6 24.d7 (24.e4 Qg4 25.c5 Qf4+–) 24...Qb7 25.g3 (25.Rd6!? Rd8+–) 25...Rd8 26.Nd4 (26.Ne1 Rb4 27.Qa5 Rb1 28.Rb1 Qb1+–) 26...Rb4 27.Qc6 (27.Qa2 Rb2 28.Qa3 Rb6+–) 27...Qc6?? (better 27...Bd4 28.Qb7 Rb7 29.ed4 Kf8+–) 28.Nc6 (28.Nc6 Rb7 29.Nd8 Bd8 30.c5+–) 1–0. GuestMKNW – GuestHYHY, freechess.org, 2017.

4.e3 Nf6 5.d4 e5 (5...Rb8!?+=) 6.Nf3 (6.Bb5 Bd7+–) 6...ed4 (6...a6 7.de5 Ne5 8.Be5 de5 9.Qd8 Kd8 10.Ne5 Be6+–) 7.ed4 (7.Bb5 Bd7 8.ed4 Rb8+–) 7...Be7? (7...a6 8.d5 Ne5 9.Be2+=) 8.Qe2 (better 8.d5!? Ne5 9.Bb5 Bd7 10.Bd7 Nfd7 11.0–0+–) 8...0–0 (8...Bd7=) 9.g3 (9.Qb5 Bd7 10.Qa6 Nb8+=) 9...Re8 (9...Rb8 10.Bg2=+) 10.Qd3 (10.Qb5!? Bd7 11.Qd3=) 10...Bg4 (10...a5 11.Nc3–+) 11.Be2 h6 (11...d5 12.0–0 (12.Qb5? Bb4 13.Kf1 Bd6–+) 12...a6 13.Ne5 Be2 14.Qe2=+) 12.h3 (12.Qb5 Qd7+=) 12...Bh5 (12...Bd7!?=+) 13.g4 (13.Qb5 Qd7+=) 13...Bg6 14.Qd2 (better 14.Qb5!? Nb8 15.g5 hg5 16.Ng5+=) 14...d5 (14...Ne4 15.Qd1 a6 16.0–0–/+) 15.h4 (15.Nc3!?=+) 15...Ng4–/+ 16.h5 (16.Rg1 h5 17.Nc3 a6–+) 16...Bh7 (16...Be4 17.0–0–+) 17.Ne5 (17.Rg1 Bf5–/+) 17...Nge5 18.de5 Ne5 (better 18...d4 19.0–0 Qd5–+) 19.0–0?? (19.Be5!? Bf6 20.f4 Be5 21.fe5 Re5 22.Nc3=+) 19...c6 (better 19...Nc4 20.Bc4 dc4 21.Re1–+) 20.Kh1?? (20.Be5 Bg5 21.f4 Re5 22.c4 Re2 23.Qe2–+) 20...Qd6 (20...Bd6 21.Kg2 Qh4 22.Rh1 Be4 23.f3 Qg4 24.Kf1 Bf3 25.Rg1 Qh3 26.Kf2 Be2 27.Qe2 Qf5 28.Kg2–+) 21.Rg1 (21.Nc3 Qd7 22.Rfd1 Qh3 23.Kg1 Bg5–+) 21...Be4 22.f3 Bh7 (better 22...Nf3 23.Rg7 Kf8 24.Bf3 Bf3 25.Rg2 Bg5–+) 23.Qh6 (23.Kg2–+) 23...Qh6 24.Be5 Qh5 25.Kg2 Qe5 26.Kf1 Bc2 (26...Bc5 27.Rg2 Qa1 28.Bd1 Qb1 29.Rg1 Qd1 30.Kg2 Qg1 31.Kh3 g5 32.bc5 Bf5) 27.Nd2 d4 (better 27...Qa1 28.Kg2 Qa3–+) 28.Bd3 Bd3 29.Kf2 (29.Kg2 Qg5 30.Kh1 Qh4 31.Kg2 Bd6 32.f4 Re2 33.Kf3 Qf4) 29...Qe2 (29...Qh2 30.Ke1 Qe2) 30.Kg3 Qd2 (30...Bd6 31.f4 Re3 32.Kh4 Be7 33.Rg5 Qh2 34.Kg4 Qh3) 31.Rh1 (31.Rae1 Bd6 32.Re5 Be5 33.f4 Qf4 34.Kh3 Bf1 35.Rf1 Qg3) 31...Bd6 32.Kg4 (32.Kh3 Bf5 33.Kh4 Qh6) 32...Qe3 (32...Qf4 33.Kh3 Qg3) 33.Rh8 Kh8 34.Rh1 Kg8 35.Rh7 (35.Rh8 Kh8 36.Kh5 Qf3 37.Kg5 Be7) 35...Qf4 36.Kh3 (36.Kh5 g6) 36...Bf5 (36...Qg3) 37.Kg2 Bh7 (37...Qd2 38.Kf1 Re1) 38.Kf2 Qe5 (38...Qd2 39.Kf1 Re1) 39.a4 (39.f4 Qf4 40.Kg2 Re2 41.Kh3 Bf5) 39...Qe2 (39...Qg3 40.Kf1 Bd3) 40.Kg1 Bd3 (40...Qh2 41.Kf1 Bd3) 41.a5 (41.f4 Qf1 42.Kh2 Bf4) 41...Qf3 (41...Qf1) 42.a6 Re2 (42...Re1) ½–½. Agiant – Arbor_Vitae, lichess.org, 2019.

4.e4 a6 5.c4 bc4 6.Bc4 e5 7.Bd5 Bd7 8.Nf3 Be7? (better is 8...Nge7+=) 9.Qc2+– Na7 10.Ba8 Qa8 11.0–0 c6 12.d4 ed4 13.Bd4 Nf6 14.e5 de5 15.Ne5 Nb5 16.Nd7 Nd4 17.Nf6 Bf6 18.Re1 Ne6 19.Nc3 0–0 20.Rad1 Bc3 21.Qc3 Rc8?? (21...a5+–) 22.Re6! fe6 (22...c5 23.Red6 Re8 24.bc5 Qe4+–) 23.Rd7 Kf8 24.Qg7 (24...Ke8 25.Qe7 1–0. Pleschke,Helmut (1655) – Flaks,Tony, IECG, 1999.

4.e4 e5 5.Nf3 h6? (5...a6 6.c4 bc4 7.Bc4+/–) 6.d4 (6.Bb5 Bd7+–) 6...ed4 (6...a6 7.de5 Be6 8.ed6 Qd6 9.Nbd2+–) 7.Nd4 (better is 7.Bb5 Bd7 8.Nd4 Nd4 9.Bd7 Qd7 10.Bd4+–) 7...Bb7? (better is 7...Nd4 8.Qd4 a6+/–) 8.Bb5+– Qd7 9.0–0 a6 10.Be2 (10.Ba4!? Nge7+–) 10...Nge7 11.Nd2 Nd4 12.Bd4 Ng6 13.Bc4 d5 14.Bb3?? (14.ed5 0–0–0+–) 14...f6?? (better is 14...de4 15.c3 0–0–0+/–) 15.c3 (better is 15.ed5 0–0–0 16.c4+–) 15...Be7?? (15...Nf4+–) 16.Ba4 c6 17.c4 (better is 17.Qh5!? 0–0 18.Qg6 a5 19.ed5 ab4+–) 17...Kf8?? (better is 17...de4 18.Ne4 0–0–0+–) 18.cd5 Ne5 (18...a5 19.Nc4 ab4 20.Nb6+–) 19.Be5 fe5 20.f4 (better is 20.Nc4 Bf6 21.dc6 Bc6 22.Qd7 Bd7 23.Bd7 Ke7+–) 20...Qc8 (20...ef4 21.Rf4 Kg8+–) 21.fe5 Kg8 22.Qh5 (better is 22.dc6!? Kh7 23.Rc1 a5+–) 22...Qe8 (22...Kh7 23.Rac1 Ra7 24.dc6+–) 23.Qf5 a5 (23...g6 24.Qf3 Rh7 25.Qc3+–) 24.Rf2 (better is 24.dc6 Rh7 25.cb7+–) 24...ab4 (24...Rh7 25.Raf1 Bh4 26.dc6 Bf2 27.Rf2 Ba6+–) 25.Qe6 (better is 25.Bb3 cd5 26.ed5+–) 25...Kh7 26.Raf1?? (better is 26.d6 Bd6 27.Qe8 Rhe8 28.ed6 Ra4 29.Rb1+–) 26...Ra4–/+ 27.Qf5 Kg8?? (better is 27...Qg6 28.d6 Ba6–/+) 28.Qf7?? (better is 28.d6 Bc8 29.Qf3 Ra3 30.Qf7 Qf7 31.Rf7+=) 28...Qf7–+ 29.Rf7 ba3?? (better is 29...Bc5 30.Kh1 Ba6 31.ab4 Bb4–+) 30.Re7+/– a2? (better is 30...Ba6 31.Ra1 cd5 32.ed5 Kh7+/–) 31.Nb3?? (31.Ra1 Bc8 32.d6 Kh7+–) 31...cd5?? (better is 31...Rb4 32.Rff7 Rb3 33.Rg7 Kf8 34.Rgf7 Kg8 35.Rg7 Kf8 36.Rgf7 Kg8 37.Rg7=) 32.Rb7+– de4 33.Ra1 Kh7 34.Nc5 Rc4 35.Ra2?? (better is 35.Ne6 Ra8 36.Ng7+– (36.Rg7?! Kh8+–)) 35...Rc5= 36.e6 Re5 37.e7 Re8 38.Rab2 R8e7 39.h4 e3 40.Re7 Re7 41.Re2? (41.Kf1 Rf7 42.Ke1 Kg6+=) 41...g5?? (better is 41...Kg6!? 42.Kh2 Kf5–+) 42.h5 (better is 42.hg5!? hg5 43.g4=) 42...Kg7–/+ 43.Kf1 Kf6 44.g4 Re4 45.Ke1? (45.Ra2 e2! (worse is 45...Rg4 46.Ra6 Kf5 47.Rh6+=) 46.Ke1 Ke5–+) 45...Ke5 (better is 45...Rg4 46.Re3 Rh4–+) 46.Rg2?? (better is 46.Rb2–/+) 46...Kf4–+ 47.Ke2 (47.Rg1 e2 48.Rg2–+) 47...Ra4 48.Kd3 Kf3 49.Rg1 Rg4 (better is 49...e2 50.Re1 Re4 51.Kd2–+) 50.Rf1 Kg2 51.Rf6 (51.Re1 Rg3 52.Ke2 g4–+) 51...Rh4 (better is 51...Re4! 52.Ke2 Kh2–+) 52.Rh6 g4 53.Ke3 g3 54.Ke2?? (54.Rg6 Rh5 55.Kf4 Rh4 56.Ke3 Rh8–+) 54...Kg1 (54...Kh1 55.Rg6 g2 56.Kf2 Rh5 57.Rg2 Rf5 58.Kg3 Rg5 59.Kf4 Rg2 60.Ke5–+) 55.Rg6 (55.Kf3 g2 56.Kg3–+) 55...g2 56.Kf3 (56.Rg5 Kh2–+) 56...Rh3 57.Kg4 Rh2 (57...Kh2 58.Kf4 Rh5 59.Kg4–+) 58.h6?? (58.Kg5 Kh1 59.Kh6=) 58...Kh1 (better is 58...Kf2 59.Kf4 Rh4 60.Kf5 Rh5 61.Kf6 Rh6 62.Rh6 g1Q–+) 59.Kf5= g1Q 60.Kf6?? (better is 60.Rg1 Kg1 61.Kg6=) 60...Qf2 61.Kg7 Qd4 62.Kg8 Qd8 63.Kh7 Qf8 64.Re6 Rf2 65.Re1 Kh2 0–1. rimazu (2115) – valerypavlovich (2105), net–chess.com, 2015.

3.a3 e5

4.Nc3 a6 5.e3 d5 6.Nf3 (6.a4 Bf5 7.g4 Bg6 8.Nf3 Nb4 9.d3 f6 10.Bg2 c6 11.0–0) 6...Nf6 7.Be2 (7.d4 e4 8.Ne5 Bb7= (8...Bd7 9.f4 Bd6 10.Be2 0–0 11.0–0) 9.a4 ba4 10.b5 Ne5 11.de5; 7.a4 Nb4 8.ab5 Bf5 9.d3 Bd6 10.Be2 0–0 11.ba6) 7...Bd6 8.0–0 (8.d3 0–0 9.0–0 h6 10.a4 ba4 11.Na4) 8...0–0 9.d3 d4 (9...Re8 10.Qd2+= (10.h3 h6 11.Nd2) 10...h6 11.h4; 9...h6 10.a4 ba4 11.Na4) 10.Ne4= de3 (10...Be6 11.Qd2) 11.Nf6 (11.fe3 Ne4 12.de4 Be6=) 11...Qf6 12.c4 (better is 12.fe3 Qh6 13.Qd2=) 12...Nd4 (better is 12...ef2 13.Rf2 Qe6+=) 13.Nd4?? (better is 13.c5+/–) 13...ed4–/+ 14.fe3 Qg5 15.Bd4= Bb7 16.Bf3+/– Bf3 17.Qf3 c5 18.bc5 Bc7 19.g3 f6? 20.Qc6 Ba5?! 21.Qd5 Kh8 22.Qg5 fg5 23.Rf8 Rf8 24.cb5 ab5 25.c6 Bc7 26.Bc5 Rf6 27.e4 h6 28.a4 ba4 29.Ra4 Rc6 30.Ra8 Kh7 31.d4 Be5 32.de5?? Rc5+/– 33.e6 ½–½. Neumann,Frank (1635) – Tortoza,Carlos (1685), RSS7E schnell–57, 2010.

4.d4 ed4 5.Nf3=.

4.d4 Nd4 5.e3 Nf5? (5...Ne6 6.Be5 a5 7.ba5 Ra5 8.Nf3=) 6.Be5 (6.Qf3!? d5 7.Bb5 Ke7 8.Be5+–) 6...Qe7 (6...Bb7!?=) 7.Bc7+/– d6?? (better is 7...Bb7+/–) 8.Bb5+– Bd7 9.Bd7 (better is 9.Qd5 Rc8 10.Qb7 Rc7 11.Qc7+–) 9...Qd7 10.Ba5 g6 11.a4 Bg7 12.Ra2 Rc8 13.b5 (13.Nf3!? Qe6 14.Ra3 Nge7+–) 13...Qe6+/– 14.Ra3 Bb2 (better is 14...Nh4!? 15.Rd3 Ng2 16.Kf1 Nh4 17.Rd6 Qe7+/–) 15.Rb3 Qe5? (better is 15...Be5+–) 16.Nf3 Qf6 17.Nbd2 (better is 17.c3 Ba1 18.Nbd2+–) 17...Bc3 (17...d5+–) 18.Bc3 Rc3 19.Qa1 (better is 19.Ne4 Qe7 20.Nc3+–) 19...Rc2 20.Qf6 Nf6 21.0–0 0–0 22.h3 d5 23.Rd1 Ne4 24.Ne4 de4 25.Ng5 h6? 26.Ne4+– Rc4 27.Nc3 Rfc8 28.Rc1 Nd6 29.f3 f5 30.Ra3 R8c5? 31.Kh2 g5 32.Rd1 Nc8 33.Ne2 h5 34.g3 Rc2+/– 35.Re1 Nb6 36.Kg1 Nc4 37.Rd3 Nb2 38.Rd8 Kf7 39.Rd7 Ke6? 40.Ra7 Nd3 41.Ra6 Kd5? 42.Nd4 Ne1+= 43.Nc2 Rc2 44.e4 fe4–/+ 45.fe4 Ke4?? 46.Re6+/– Kf3 47.Re1 Rg2 48.Kf1 Rf2= 49.Kg1 Ra2?? 50.Rb1+– Kg3? 51.b6 Rg2 52.Kf1 Kh2 53.Rb3 Rg1 54.Ke2 Rg2 55.Kd1 Rg1 56.Kc2 Rg2 57.Kb1 Rg3 58.Rg3 Kg3 59.b7 Kh3 60.b8Q g4 61.Qb3 (61.Qb3 g3 62.a5+–) 1–0. Valpa – Angelreino, playchess.de, 2002.

4.d4 Bd6 5.de5 (5.e3 a6) 5...Be5= 6.Be5 Ne5 7.Qd5 Nc6 8.Qb5 Nd4 9.Qe5 Ne6 10.e3 Nf6 11.Nf3 0–0 12.Be2 Bb7 13.0–0 Ng4 14.Qc3 d6 15.Nd4 Ne5 16.f4 Nd4 17.Qd4 c5 (17...Nc6!? 18.Qd3 Qf6) 18.bc5+– Nc6 19.Qc3 dc5 20.Qc5 Qf6 21.Nd2 Ne7 (21...Rfd8 22.Ne4 Qe6 23.Ng5+–) 22.Bf3 (22.Rab1 Rfb8+–) 22...Rfc8+/– 23.Qb4 (better is 23.Qh5 Bf3 A) 24.gf3?! Qc3 (< 24...Rc2 25.Ne4 Qa6 26.Rf2 Rf2 27.Kf2) 25.Qe5 Qd2; B) 24.Qf3) 23...Nc6?? (better is 23...Bf3 24.Nf3 Rc2) 24.Qb7+– Rab8 25.Qa6 h6 26.Bc6 Rc6 27.Qd3 Rb2 28.Rfc1 Rbc2 29.Rc2 Qa1 30.Kf2 Rb6 31.Rc8 1–0. Hasler,Ueli – Tortoza,Carlos, CiF, 2006.

4.d4 Qe7 5.d5 Nd8 6.e4 d6? (6...c6 7.Nf3) 7.h4 (7.Bb5 Bd7 8.Bd7 Qd7+–) 7...Nf6 (7...Bd7!?) 8.Bb5+/– Bd7 9.Bd3 g6 10.Nf3 Bg7 11.Nc3 0–0 12.Ng5 Bg4 13.Be2 Be2 14.Qe2 (14.Ne2?! h6 15.Nh3 Ne4=) 14...c6 15.0–0–0 (15.dc6 Nc6 16.0–0 h6) 15...cd5 16.ed5 Nb7 17.Nce4 Ne4 18.Qe4 f5 19.Qe2 Bh6 20.Kb1 (20.f4!? Rfe8 21.Rhe1) 20...Bg5= 21.hg5 Qg5 22.Qb5 Rfb8?? (better is 22...Rf7=) 23.Qd7+– Qd8?? (23...h5 24.f4! Qf6 25.fe5 de5+–) 24.Qh7 Kf8 25.Qh8 Ke7 26.Rh7 1–0. michael709 – LuckyMiki, internet, 2007.

4.e3 a6 5.c4 bc4 6.Bc4 Nf6 7.Nf3 d5 8.Bb3 Bd6 9.Ba4 Bd7 10.Bc6 (10.Qc2 Ne7 11.Be5 Be5 12.Ne5 0–0+–) 10...Bc6 11.Ne5 Be5 (11...Bb5 12.Ng4 Be7 13.Bf6 Bf6 14.d4+–) 12.Be5 0–0 13.0–0 (13.Qc2 Re8 14.d4 Re6+–) 13...Re8 14.f4 Bb5 15.Rf3 (15.d3 a5 16.Nc3 c6+–) 15...Bd3 16.Nc3 c6 17.Rg3 g6 (17...a5 18.Na4+–) 18.Bd4 (18.Na4+–) 18...Ne4 (18...a5!?+–) 19.Ne4+– Re4 (19...de4 20.Qh5 Qd7 21.f5+–) 20.Qh5 Qf8 21.Rf1?? (21.Rc1 Rae8 22.Rh3+– (22.Rc6 Rd4 23.Rc3 Bc4 24.ed4 Re1 25.Kf2 Rf1 26.Ke3 Kh8 27.Rg6 fg6 28.Qe5 Kg8 29.Qe6 Kg7 30.Qd7 Kh8–+)) 21...Rd4 22.ed4 Bf1 23.Kf1 f5 (23...a5 24.ba5 Ra5 25.Qf3=) 24.Qd1 (24.Qe2 Qd6 25.Qe5 Qd7+–) 24...Qf6 25.Rd3 (25.Qe2 Qd4 26.Qe6 Kg7 27.Qd7 Kh8 28.Qc6 Qf4 29.Rf3 Qc4 30.Qc4 dc4+–) 25...Re8 (25...Qh4=) 26.Qa1 (26.g3 Re4+=) 26...Re4 (26...Qh4 27.Re3 Qf4 28.Ke2 Re3 29.de3 Qh2 30.Qf1–/+) 27.Re3 (27.g3 g5 28.fg5 Qg5+=) 27...Kf7 (better 27...Rf4!? 28.Kg1 Re4=+ (28...Rd4?? 29.Rd3+–)) 28.g3= Qd4 29.Qe1 (29.Qd4 Rd4 30.Ke2 Rc4=) 29...Re3 30.Qe3 (worse 30.de3 Qd3 31.Kg2 Qa3–/+) 30...Qc4 (30...Qe3 31.de3 Ke6 32.Ke2=) 31.Kf2 (31.d3 Qb5+=) 31...d4 32.Qe5 Qd5?? (better 32...Qd3!?=) 33.Qc7 (better 33.Qd5!? cd5 34.Ke2+–) 33...Kg8 34.Qc8 Kg7 35.Qa6 d3 36.Qa7 Kh6 37.Qc5 (37.Qe3 Qb3 38.g4 fg4 39.f5 Kg7 40.Qe7 Kh6+–) 37...Qe4 (better 37...Qh1 38.h3 Qh2 39.Ke3 Qg3 40.Kd4 Qf4 41.Kd3 Qe4 42.Kc3 Qh1=) 38.Qe5 Qc4 39.Qc5 Qb3?? (39...Qe4 40.Qe3 Qc4+–) 40.Qf8+– (40.Qc6?! Qa3 41.Qc5 Qa8+–) 40...Kh5 41.Qg7 h6 (41...Qg8 42.Qg8 Kh6 43.a4 c5 44.bc5 Kh5 45.Qh7 Kg4 46.h3) 42.Qf6 (42.Qe7 g5 43.Qe8 Qf7 44.Qf7 Kg4 45.h3 Kh3 46.Qh5) 42...Qa3 43.Qh4 1–0. GuestLCZK – pawnsprogess, freechess.org, 2018.

4.e3 a6 5.c4 d6? 6.cb5+/– ab5 7.Bb5 Bd7 8.Nf3 Nf6 9.0–0 g6 (9...e4 10.Qc2 Ne7 11.Nd4+–) 10.Qc2 Bg7?? (better is 10...Ne7 11.Bd7 Qd7+–) 11.Bc6 Bc6 (11...Ra7 12.e4+–) 12.Qc6 Kf8 13.Nc3 Ke7 14.Nd5 Nd5 15.Qd5 Rc8 16.Ng5 c6 1–0. Hal1958 – Ronan48, playchess.de, 2002.

4.e3 Ba6 5.a4 Bb4? 6.ab5+– Bb5 7.Bb5 Na5 (7...Nge7+–) 8.Be5 f6 9.Bd4 c6 10.Be2 (10.Bd3 g6+–) 10...c5 (10...d5 11.Bd3+–) 11.Bb2 (better 11.c3 cd4 12.cb4+–) 11...d5 (11...Nc6+–) 12.c3 Bc3 (12...Ne7 13.cb4 cb4 14.Bh5 Kf8 15.d3+–) 13.Bc3 (better 13.Qa4 Kf8 14.Nc3 Nb7+–) 13...d4 (13...Nc6+–) 14.Ba5 Qa5 (14...Qd6+–) 15.Ra5 de3 16.de3 Rd8 17.Bh5 (17.Bb5 Kf7 18.Qd8 Ne7 19.Qh8 Kg6 20.Bd3 f5 21.Ra6 Kf7 22.Bc4 Nd5 23.Qd8 g6 24.Ra7 Ke6 25.Qe7) 17...g6 18.Qa4 Kf8 19.Ra7 gh5 20.Ra8 (better 20.Qc6 Re8 21.Qd6 Re7 22.Re7 Ne7 23.Qd8 Kf7 24.Qh8 Nf5+–) 20...Ra8 21.Qa8 Kg7 22.Qb7 Kh6 23.Qf7 f5 24.h4 (24.Nf3 h4 25.Qf8 Kg6 26.Ne5 Kh5 27.Qf5 Kh6 28.Qg4 Nf6 29.Nf7) 24...c4 (24...Ne7 25.Qe7 Rg8 26.Nh3 Rg6 27.Ng5 Rg7 28.Qf6 Rg6 29.Nf7) 25.Nc3 (25.Qf8 Kg6 26.Ne2 h6 27.Nf4 Kh7 28.Qf7) 25...f4 (25...Ne7 26.Nf3 Ra8 27.Ng5 Ra1 28.Ke2 Ra2 29.Na2 c3 30.Qh7) 26.ef4 (26.Nd5 Ne7 27.Ne7 fe3 28.Nf5) 26...Nf6 (26...Ne7 27.Qf6 Ng6 28.g4 hg4 29.h5 Re8 30.Kf1 Re1 31.Ke1 g3 32.hg6) 27.Qf6 1–0. GuestJWTP – GuestCJPX, freechess.org, 2017.

4.e3 Ba6 5.a4 Bb7 6.ab5 Nb4 7.Be5 Qe7+/–.

4.e3 Ba6 5.Nf3 (5.a4 Bb7 6.ab5 Nb4 7.Be5 Qe7+/–) 5...f6 (5...e4 6.Nd4+=) 6.Nc3+/– Qb8 7.Be2 Nh6 8.0–0 Bd6 9.h3 (9.d4 ed4 10.ed4 Ne7+/–) 9...0–0 10.Rc1 (10.d4 Nf7+/–) 10...Re8+= 11.Ne4 Be7 12.d4 ed4 (12...d5 13.Nc3 e4 14.Nd2+=) 13.Nd4 Ne5 14.Nc5 (14.Nb5 c6 15.Nbc3 Be2 16.Qe2 a5+/–) 14...Bc5+= 15.bc5 c6 16.a4 (16.Qd2!?+=) 16...ba4+= 17.Ba6 Qb2 18.Rb1 (18.Ra1 Qb4+=) 18...Qc3–/+ 19.Qe2 Rab8 20.Ra1 Rb2 21.Rfc1 Rc2?? 22.Qc2+– Qa5 23.Ra4 Qc7 24.Rb1 g6 25.Rb7 Qd8 26.Rab4 Qa5 27.Ra4 Qe1?? 28.Kh2 Nhg4 29.hg4 Ng4 30.Kg3 Ne3 31.Qb3 Nd5 32.Nf3 Qe7 33.Bc4 Qe4 34.Bd5 cd5 35.Re4 Re4 36.Qd5 (36.Qd5 Kg7 37.Qd7 Re7 38.Qe7 Kh6 39.Qh7) 1–0. Fournier,Frederic – jaber116, Active, 2004.

4.e3 Bb7 5.f4 (better is 5.Bb5 Nb4 6.Nf3 (worse is 6.ab4 Bg2 7.Nf3 Bh1–/+) 6...Bf3 7.gf3+=) 5...ef4+= 6.ef4 Qh4 7.g3 Qe7 8.Qe2?? (8.Kf2!? Nb4 9.Nf3 Qc5 10.Bd4 Bf3 11.Bc5 Bd1 12.Bf8 Kf8 13.ab4 Bc2 14.Bb5+=) 8...Qe2 (better is 8...Nd8 9.Nc3 a6 10.Qe7 Ne7 11.Nf3 Bf3 12.Rg1–+) 9.Ne2 (9.Be2 Nb4 10.ab4 Bh1 11.Bd4–+) 9...Nb4 10.ab4 Bh1 11.Nd4 c6 12.Nf5 f6 13.Bc3 Ne7?? 14.Nd6+/– Kd8 15.Bd4?? Bd5?? 16.Na3?? Nc8 17.Nb7 Kc7 18.c4 bc4 19.b5 Kb7 20.Bh3 c5 21.Bc3 Nb6 22.Bf1 Re8 23.Kd1 Bf3 24.Kc1 Re1 25.Kb2 Na4 26.Ka2 Ra1 27.Ka1 Nc3 28.Nc4 Nb5 29.Na5 Kb6 30.Nc4 Kc7 0–1. Schmidt,Valeska – Collisy,Klaus Dieter, Dortmund6, 2003.

4.e3 d5 5.Bb5 Bd7 6.Bc6 Bc6 7.Be5 Qg5 (7...a5 8.ba5 Nf6 9.Nf3+–) 8.Bg3 (8.Nf3 Qe7+–) 8...Nf6 (8...a5 9.ba5 (9.Bc7 Qg2 10.Qf3 d4 11.Qg2 Bg2 12.Ba5 de3–+) 9...Qf6 10.d4+–) 9.f4 (9.Nf3!? Qg4+–) 9...Qg6 10.Nf3 Ne4 11.Ne5 Qe6 (11...Qf6 12.Qf3+/–) 12.Nc6 Qc6+/– 13.Nc3 f5 14.Ne4+– fe4 15.0–0 h5 16.Bh4 Bd6 17.c3 Qd7 18.Qe1 Qf7 19.Qg3 Rg8 20.Qg5 Be7 21.Qe7 Qe7 22.Be7 Ke7 23.Rac1 h4 24.h3 g6 25.c4 c6 26.cd5 cd5 27.Rc5 Kd6 28.Rfc1 g5 29.Rc6 Kd7 30.Rc7 Kd8 31.R7c5 gf4 32.Rd5 Ke7 33.ef4 Rg3 34.Re5 Kf6 35.Rc3 Rg6 36.Re4 Rag8 37.Rc6 Kf5 38.Rg6 Rg6 39.Rc4 Ra6 40.Rc3 Kf4 41.Kf2 Rf6 42.Rf3 Ke5 43.Rf6 Kf6 44.Kf3 1–0. Fournier,Frederic (1835) – vendotomates, Active, 2008.

4.e3 Nf6 5.Bb5 Bb7 6.c4?? Nb4 7.ab4 Bg2 –+.

4.e3 Nf6 5.Bb5 Bb7 6.c4?? e4?? 7.Nc3 a6 (better is 7...Ne5 8.c5 Nfg4=) 8.Ba4?? (8.Bc6 Bc6 9.f4+=) 8...Be7?? (8...Ne5!? 9.Rb1 Be7+=) 9.Nge2?? (9.d4 ed3 10.Nf3 0–0+/–) 9...0–0 (9...Ne5 10.0–0 Nc4 11.Qc2+=) 10.Bc2 (10.Nd5!?+/–) 10...Na7? (better is 10...Ne5 11.Ne4 Nc4 12.Bf6 Bf6+= (12...gf6? 13.Nd4 Ne5 14.Qh5+–)) 11.Ng3+– 1–0. cristero (2460) – pushtiu (2245), net–chess.com, 2015.

4.e3 Nf6 5.Bb5+/– Bb7 6.Nf3 a5 7.ba5 Ra5 8.Bc6 Bc6 9.Bc3+/–.

4.e3 Nf6 5.Bb5+/– Qe7 6.Nf3 e4 7.Bc6 dc6 8.Nd4 (8.Ne5 Qe6+/–) 8...Bd7 (8...c5 9.Nc6 Qe6 10.b5+=) 9.c4 (9.Nb3 a5 10.ba5 c5+/–) 9...Ng4 (better is 9...c5 10.Nc2 Be6+=) 10.Nc6 Bc6?? (better is 10...Qh4 11.g3 Qh3–/+) 11.Qg4+– h5 12.Qf4 Rh6 13.b5 g5 14.Qe5 f6?? 15.Qe7 Be7 16.bc6 f5 17.Nc3 Rc6 18.Ke2 Rc4 19.Rhc1 Rc5 20.Na4 Ra5 21.Nc3 Rb8?? 22.Nd1 Bd6 23.Bc3 Ra6 24.Bb4! Bb4? 25.ab4 Ra1 26.Ra1 Rb4 27.Ra7 Kd7 28.Nc3 h4 29.h3 g4 30.hg4 fg4 31.Nd5 Rc4 32.Nf6 Ke6 33.Ng4 Kf5 34.Nh6 Kg5 35.Nf7 Kg4 36.Ne5 Kf5 37.Nc4 Ke6 38.Rc7 Kd5 39.Rc8 h3 40.gh3 Ke6 41.Rg8 Kd5 42.d3 Kc5 43.h4 Kb4 44.h5 Kc3 45.de4 Kc4 46.h6 (46.h6 Kb4 47.h7 Kb3 48.Rb8 Kc4 49.h8Q Kc5 50.Qh6 Kc4 51.Qc6) 1–0. Fournier,Frederic (1960) – chumbe, Active, 2011.

4.e4 a6 5.c4 d6 (better is 5...Rb8!?) 6.cb5+/– ab5 7.Bb5 Bd7 (8.Nf3 Nf6). Klaus Behrmann – Zamoht, ChessWorld.net, 2005.

4.e4 a6 5.Nf3=.

4.e4 Rb8 5.Nf3 Nf6 6.Nc3 a6 7.Be2 d5 (7...Bd6 8.0–0=) 8.ed5+= Nd5 9.0–0 Bg4?? (better is 9...Nf4+=) 10.Nd5 (10.Ne5 Be2 11.Qe2 Nf4+–) 10...Qd5 11.h3 (11.Ne5 Be2 12.Qe2 Ne5 13.Be5 Rb6+–) 11...Bh5 (better is 11...Bf5 12.c4 bc4+/–) 12.d3?? (12.Ne5!? Be2 13.Qe2 Ne5 14.Be5 Rb6 15.Bc7 Re6+–) 12...Be7? (better is 12...Bd6!?=) 13.c4 bc4 14.dc4 Qd1 15.Rfd1 0–0 16.Kf1 Rfd8? 17.Ne5+– Be2 18.Ke2 Ne5 19.Be5 Rd1 20.Rd1 Rc8 21.Rd7 Rd8 22.Re7 c6 23.Kf3 Kf8 24.Rc7 h6 25.Rc6 Ra8 26.Rb6 Kg8 27.Rb8 Rb8 28.Bb8 f5 29.Kf4 g6 30.Ke5 Kf7 31.Kd6 (31.Kd6 Ke8 32.b5 ab5 33.cb5+–) 1–0. Neumann,Frank (1650) – Henkel,Ute (1625), RSS7E–76 remoteschach.de, 2008.

4.e4 Nd4 5.Nc3 (5.c3 Ne6) 5...Nf6 (5...a6 6.Nf3 Bb7 7.Ne5) 6.Bb5 (6.Nb5 c5) 6...c6 (6...a5 7.Bc4 ab4 8.ab4 Ra1 9.Ba1 Bb4 10.Nf3=) 7.Bc4 (7.Bd3 a5 8.Nce2 Ne2 9.Ne2 d6) 7...Bb7 (7...d5!? 8.ed5 Bf5) 8.Nf3+/– Be7 (8...d5!? 9.ed5 cd5) 9.Ne5+– c5?? (9...d5 10.ed5 cd5 11.Bd3+–) 10.b5 (better is 10.Nf7 Qc7 11.Nh8 cb4 12.Bf7 Kf8 13.ab4 Be4 14.Ne4 Nc2 15.Ke2 Na1 16.Qa1+–) 10...Qa5? (10...0–0 11.f3+–) 11.0–0 (better is 11.Bf7 Kf8 12.Bc4+–) 11...Be4?? 12.Bf7 Kf8 13.d3 Bd3?? 14.cd3 Qc7 15.Re1 Nf5 16.Bd5 Bd6 (17.Nd7! Nd7 18.Ba8 Bh2 19.Kh1 Be5+–; 16...Re8 17.Nf7 Rg8 18.Ng5+–). curinthia – mysticpsycho, net–chess.com, 2005.

4.e4 d6 5.Bb5 d5?? (better is 5...Bd7) 6.Bc6+– (6...Bd7 7.Ba8 Qa8 8.Be5 de4 9.Nc3+–) 1–0. bostvinnik – dcroll, net–chess.com, 2005.

4.e4 Nf6 5.Bb5 a5+/–.

4.e4 Nf6 5.Nc3 a6 6.Nf3=.

4.e4 Nf6 5.Nc3 Nd4 6.Nf3 (6.Nb5 Nb5 7.Bb5 c6+/–) 6...c5 7.Nd4 (7.Nb5 Nf3 8.Qf3 a6+=) 7...ed4 (7...cd4 8.Nd5 a6 9.Bd3=) 8.Ne2 (better is 8.Nb5 d6 9.Qe2+/–) 8...Ne4+= 9.d3 Nf6 10.Nf4 (10.bc5!? Bc5 11.Bd4+=) 10...d6 11.bc5 (11.Be2!?–/+) 11...dc5–+ 12.Be2 Bb7 13.Bf3 Bf3 14.Qf3 Qe7?? (14...Bd6 15.c3–/+) 15.Qe2?? (better is 15.Kf1 0–0–0 16.Qa8 Kd7 17.Qa7 Kc8 18.Qa8 Kc7 19.Qa5 Kc6 20.Qa6 Kc7 21.Bc1+/–) 15...Qe2 16.Ne2 Bd6 17.g3 a5 18.0–0 a4 19.Rfe1 0–0 20.f4 h5 21.c3 Rfe8 22.cd4 Rac8 23.dc5 Bc5 24.d4 Bd6 25.Nc3 Rb8?? 26.Re8= Re8 27.Nb5 Re2 28.Nd6 Rb2 29.Nc4 Rc2 30.Nb6 Rd2 31.Na4 Rd4 32.Nc5 Ne4 33.Ne4+– Re4 34.a4 f5 35.a5 Re7 36.a6 Ra7 37.Kg2 Kf7 38.Kf3 Kf6 39.h3 g5? 40.fg5 Kg5 41.h4 Kg6 42.Ra5 Kf6 43.Kf4 Ke6 44.Rf5 Ke7 45.Rh5 Ra6 46.Re5 Kf7 47.g4 1–0. Neumann,Frank – Lewis,Patrick, OP–2011–0–01876, 2011.

4.e4 Nf6 5.Nc3 d5? 6.Bb5+/– Bb7 7.Nf3 (better is 7.ed5 Nd5 8.Qh5) 7...Ne4? (7...d4 8.Ne5 Qd6+–) 8.Ne4+– de4 9.Ne5 Bd6 (9...Qf6+–) 10.Nc6 Qg5 11.Na7 (11.Nd4 c6 12.Bf1 0–0+–) 11...Kd8 (11...Kf8 12.Bd4 Ra7 13.Ba7 Qb5 14.Bc5+–) 12.Bd4 (12.Nc6 Kc8 13.Qe2 Qg2+–) 12...Qg2 (12...Ra7 13.Ba7 Qb5 14.Qg4+–) 13.Rf1 Bh2 (13...Ke7 14.Qh5 Qg6 15.Nc6 Kf8 16.Qd5+–) 14.Nc6 (better is 14.Qh5 Ke7 15.Bc4 Kd8+–) 14...Kc8 15.Qh5 Ba6 16.Ne7 Kd8 17.Nc6 Kc8 18.Ba7 Kb7 19.a4 Bb5 20.Qb5 Kc8 21.a5 Qf3 22.a6 Qf6 23.Qb7 Kd7 24.b5 Qa1= 25.Ke2 Qf6? 26.Nb8+– Rab8 27.Bb8 Qb2 28.Qd5 Bd6 29.a7 Qc2 30.a8Q Ke7 31.f3 Bf4 32.Qe4 Qe4 33.Qe4 Kd8 34.Qf4 Re8 35.Kd3 g6 36.Qc7 1–0. Matthias – Master1, mySchach.de, 2004.

4.Nf3 e4 5.Nd4 Nd4 6.Bd4 a6=.

4.Nf3 e4 5.Nd4 Nf6 (5...a5 6.Nb5 ab4 7.e3=) 6.Nb5+= Ba6 (6...Be7 7.e3+=) 7.Nd4 (7.Bf6 Qf6 8.Nc7 Kd8 9.Nc3+– (9.Na8 Qa1 10.b5 Bb5=+; 9.Na6?! Qa1 10.e3 Rc8+–)) 7...Nd4+= 8.Bd4 Bd6 (8...Be7 9.Nc3+–) 9.g3 (9.Nc3 Bb7+–) 9...0–0 10.Bg2 Re8 11.0–0 Rb8 (11...Be5 12.Be5 Re5 13.d3+–) 12.d3 (12.Ba7!? Be5 13.c3 Ra8+–) 12...ed3+– 13.cd3 Be5 14.Be5 Re5 15.Nc3 d5 16.Qb3 (16.d4 Re6+–) 16...c6 (16...d4 17.Ne4+=) 17.Rac1 (17.Qc2 Bb5+–) 17...d4 (17...c5 18.Qa4 cb4 19.ab4+–) 18.Na4 (18.Ne4 Ne4 19.Be4 c5+–) 18...Qe7 19.Rc6 Bb7 20.Rc5 (20.Rc4 Bg2 21.Kg2 Re2 22.Rd4 Qe5+–) 20...Bg2 21.Re5 (worse 21.Kg2 Rc5 22.Nc5 Qc5 23.Qf7 Kf7 24.bc5 Rb3–/+) 21...Qe5 22.Kg2 Qe2 23.Nc5 (23.Qc4 Rd8 24.Rc1 h6+–) 23...Re8 (23...Ng4 24.Kg1 Nh2 25.Rc1=+) 24.Qc4?? (better 24.Qd1+–) 24...Ng4–/+ 25.Qd4?? (better 25.Kg1 Nh2 26.Rc1–/+) 25...Ne3–+ 26.Kh3 (26.Qe3 Re3 27.Kg1–+) 26...Qf1 27.Kh4 Ng2 (27...Nf5 28.Kg5 Nd4 29.Ne6 Ne6 30.Kh4 g5 31.Kg4 h5 32.Kf5 Qd3 33.Kf6 Qd8 34.Kf5 Nd4) 28.Kg4–+ Qe2 29.Kh3 Ne1 30.a4 (30.Nd7 h5 31.Qf4 Qf1 32.Kh4 Ng2 33.Kh5 Nf4 34.Kg5 Nh3 35.Kg4 Nf2 36.Kf4 Qd3 37.h3 Re4 38.Kg5 Qg3 39.Kf5 Qf4) 30...Qh5 (30...g5 31.Qh4 gh4 32.Nd7 h5 33.Nf6 Kh8 34.Nh5 Rg8 35.Ng7 Rg7 36.f3 Qg2 37.Kh4 Qh2) 31.Qh4 Qf5 32.Qg4 Qg4 (32...Qf2 33.Qf4 Qg2 34.Kg4 h5 35.Kh4 Re5 36.g4 Nf3 37.Qf3 Qf3 38.gh5 Rh5) 33.Kg4 Nc2 (33...Rd8 34.b5–+) 34.b5 Rc8 35.Ne4 Nb4 36.a5 (36.f4 Nd3 37.a5 Rb8–+) 36...Nd3 (36...Rd8 37.Kh3–+) 37.f3 (37.f4 Rd8 38.Nc3 Nf2 39.Kf3 Rd3 40.Kf2 Rc3–+) 37...Ne5 38.Kf4 Nd7 39.b6 (39.Ke3–+) 39...Rc1 (better 39...ab6 40.ab6 Nb6–+) 40.ba7 Rc8 41.Nd6 Ra8 42.Nb5 1–0. amirgloo (1610) – Wong_Linggau, lichess.org, 2018.

4.Nf3 g5 5.Be5?! Ne5 6.Ne5 Bg7+=.

4.Nf3 g5 5.Ne5 Ne5 6.Be5 f6 7.Bd4+–.

4.Nf3 g5 5.Ne5 Qf6?? 6.d4 (6.Nd3!? Nd4 7.e3 Bg7 8.Bd4 Qg6+–) 6...d6?? (better is 6...Bg7+/–) 7.Nc6+– Bb7 (7...d5 8.Ne5 c6 9.e4 de4 10.Nc3+–) 8.Na5 d5 (8...Bc8+–) 9.Nb7 Ne7 (9...Rb8 10.Na5+–) 10.e3 Qb6 11.Nc5 0–0–0 (11...Rd8 12.Bd3+–) 12.Qh5 Qg6 13.Qg6 fg6 (13...Ng6 14.Bb5 Nh4 15.g3+–) 14.Bb5 c6 15.Ba6 Kb8 16.Ne6 Bh6 (16...Rd7 17.Ng5 Nf5 18.c4+–) 17.Nd8 Rd8 18.0–0 Kc7 19.Nc3 Rd6 20.b5 Kb6 21.a4 Kc7 22.Ba3 Rd7 23.Rfb1 c5 24.Bc5 Kd8 25.b6 Nc6 26.b7 (26.Bb5 ab6 27.Bb6 Kc8 28.Bc6 Rd6 29.Bd5 Bf8+–) 26...Ke8 27.b8Q Nb8 28.Rb8 Rd8 29.Bb5 Kf7 30.Rd8 a5 31.Nd5 Ke6 (31...Kg7 32.Rd7 Kg8 33.Nf6 Kh8 34.Rh7) 32.Nc7 (32.Re8 Kf7 33.Re7 Kf8 34.Rh7 Kg8 35.Nf6) 32...Kf5 (32...Kf6 33.Ne8 Ke6 34.g4 Bg7 35.Bc4) 33.Bd3 (33.Be2 g4 34.Be7 g3 35.Rd5 Ke4 36.Bf3) 33...Kf6 (33...Kg4 34.Be2 Kh4 35.g3 Kh3 36.f3 g4 37.Bf1) 34.Ne8 Ke6 35.e4 g4 (35...Bg7 36.Bc4) 36.Bc4 1–0. Maec,Michael – Dammer,Axel, remoteschach.de, 2003.

4.f4 e4 5.e3 (5.Nc3+=) 5...d5 (5...a6 6.Nc3 d5 7.Nge2=) 6.Be2 (6.Bb5 Bd7+/–) 6...a5 (6...a6 7.a4=) 7.c3 (7.Bb5 Bd7+=) 7...a4 (better is 7...Rb8!?=) 8.Bb5+/– Bd7 9.Ne2 Qf6 (9...Ne5 10.Bd7 (10.fe5?! Bb5 11.e6 Qh4 12.g3 Qh5=) 10...Nd7 11.c4 dc4 12.Nbc3+/–) 10.0–0 (10.Ba4 Qh4 11.Ng3 Nf6+/–) 10...Qg6 (10...Nb8 11.Nd4+/–) 11.Bc6 (11.Ba4!? Bd6 12.c4 dc4 13.Qc2+–) 11...Bc6 12.g3 (12.Nd4 Bd7+=) 12...Nf6 (12...Bb5 13.f5 Qg5 14.Rf2+=) 13.h3 (better is 13.c4!?+=) 13...Bd7 14.Kh2 Qh5 15.Ng1 Bg4 (15...Qd1 16.Rd1 Bb5 17.c4 Bc4 18.Bf6 gf6 19.Nc3+=) 16.Qe1 (16.Qc2 Be2 17.Ne2 Qe2 18.Kg1 Nh5+=) 16...Bf3 17.Nf3 Ng4? (17...ef3 18.g4 Ng4 19.Kg3 Nf6 20.Rf3 Ne4 21.Kg2 g5–/+) 18.Kg2+– ef3 19.Rf3 Be7? (19...Nf6+–) 20.hg4 Qg4 21.Qh1 0–0 22.Qh3 Qg6 23.d4 Qc2 24.Rf2 Qe4 25.Kf1 Qe3 26.Bc1?? Qc1+= 27.Kg2 Qe1 28.g4 Qe4 29.Kg1 Ra6 30.Nd2= Qc2 31.Qe3 Re6–/+ 32.Qf3 Qb2 33.Nf1?? Qa1–+ 34.Qd5 Qc3 35.Qa2 Bh4 36.Rh2 Qd4 37.Kh1 Re1 38.Qg2 Bf6 39.Qh3 Qe4 40.Kg1 Bd4 (40...Bd4 41.Rf2 Re2–+) 0–1. Valpa – Dc, playchess.de, 2004.

4.f4 ef4!? 5.e4 fe3 –/+.

4.e3 d6

5.Bb5 a6?? 6.Bc6+– Bd7 7.Ba8 Qa8 8.f3 Nf6 9.Ne2 Be7 10.0–0 0–0 11.d4 a5 (11...e4 12.Ng3+–) 12.de5 de5 13.Be5 Qd5 14.ba5 (14.Bf6!? Qd1 15.Rd1 Bf6+–) 14...Qa5 (14...Qe5 15.Qd4 Qa5+–) 15.Bc3 Qh5 16.Bf6 (16…Bf6 17.c3+–) 1–0. valpa – Idris, HCL–C2351 playchess.de, 2003.

5.Bb5 Bb7 6.Qf3 Qd7 7.Nc3 a6 8.Bc6 (8.Bc4 Rb8 9.Nd5 Nge7+–) 8...Bc6 9.Qg3 (9.Nd5 a5+–) 9...Nf6+= 10.Nf3 (10.f3 a5+=) 10...g6 (10...Qf5 11.d3 Nh5 12.Qh4=) 11.0–0 (11.d3 Nh5 12.Qh4 Be7+=) 11...Nh5 12.Qh4 Be7 13.Qc4 0–0 (13...Bf3 14.gf3 c6 15.d4+=) 14.Nd5+– Bb5 (better 14...Bd5 15.Qd5 Nf6+–) 15.Qc3 (better 15.Qc7 Qc7 16.Nc7 Bf1 17.Na8 Bg2 18.Kg2 Ra8 19.c4+–) 15...Bf1= 16.Rf1 c6 (better 16...Bd8=) 17.Nb6+– (17.Ne7?! Qe7 18.Qc6 Rfc8+=) 17...Qg4 (better 17...Qc7!? 18.Na8 Ra8+–) 18.Na8+– Ra8 19.d4 (19.Qc6!? Qc8 20.Qa4 Bf6+–) 19...e4 20.Nd2 (20.Qc6?! Rc8 21.h3 Qg2 22.Kg2 Rc6=) 20...d5 (20...c5+–) 21.Qc6 Rc8 22.Qd5 (worse 22.Qa6 Rc2 23.Bc1 Nf6+–) 22...Rc2 23.Bc1 (better 23.Qa8 Kg7 24.Bc1+–) 23...Bg5? (23...Qc8 24.Nb3 Qc3+=) 24.Ne4 Nf6 (24...Bh4 25.g3 Be7 26.Nc5+–) 25.Qd8 (better 25.Qg5 Qg5 26.Ng5+–) 25...Kg7 26.Nf6 (26.Ng5 Qg5 27.Qa8 Qb5+–) 26...Bf6 27.Qa8 h5? (27...Qe6 28.Qf3 Qc4+–) 28.Qa6 h4 (28...Bh4 29.Qd3 Bf2 30.Rf2 Rc1 31.Rf1+–) 29.h3 Qe4 30.a4 (30.Rd1 Qf5 31.Qf1 Kg8+–) 30...g5 (30...Be7 31.Qb5+–) 31.b5 g4 32.hg4 Qg4 33.b6 (33.Qd6!? Ra2+–) 33...h3 34.g3 (better 34.Qb7 Bd8 35.Qf3 Qg2 36.Qg2 hg2 37.Rd1 Bb6 38.Ba3+–) 34...Qf3–+ 35.Kh2 Qg2 0–1. alt20 (1630) – petran (1690), lichess.org, 2016.

5.Bb5 Nge7 6.d4+/–.

5.Nf3 a6!?=.

5.Nf3 g6? 6.d4 (6.Bb5 Bd7+–) 6...Bg7 (6...a6 7.c4 bc4 8.Bc4+/–) 7.de5 (7.Bb5 Bd7+–) 7...de5 (7...a6!?+/–) 8.Qd8+– Nd8 9.Ne5 Nf6? (9...a6 10.a4 ba4 11.Ra4+–) 10.Nd2 (10.Bb5 c6 11.Ba4 Ng4+–) 10...0–0 (better is 10...a6!?+–) 11.Bb5 Ne6 12.Rb1 Rd8 13.Ndf3 Bb7 14.0–0 Ne4 15.Bc6 Bc6 16.Nc6 Rd7 17.Bg7 Ng7 (17...Rd6 18.Bd4 Rc6 19.Rb2+–) 18.Nfe5 Nd2?? (18...Rd2+–) 19.Nd7 Nb1 20.Rb1 Nf5 21.g4 Nd6 22.f4 Re8 23.Nf6 Kf8 24.Ne8 Ke8 25.Na7 Nc4 26.Rb3 Nd2 27.Rc3 Nf3 28.Kg2 Ne1 29.Kf2 Nc2 30.Rc2 Kf8 31.Rc7 Kg7 32.Nc6 1–0. Valpa – Idris, playchess.de, 2003.

3.a3 e6

4.e3 a6 5.c4 bc4 6.Bc4 Bb7 7.Nf3 Nf6 8.d3 (8.0–0 Be7) 8...Be7 9.Nbd2 h6 (9...0–0 10.0–0) 10.Rc1 0–0 11.d4 (11.0–0 a5 12.b5 Na7) 11...Na7 12.Be2 (12.Nb3 Nb5) 12...Nb5 (12...a5 13.ba5 Nc6 14.0–0) 13.Qc2 c6 (13...Rb8 14.0–0) 14.Nc4+/– Ne8 (14...Rb8) 15.Nce5 (15.Na5 Rb8) 15...f6 (better is 15...a5!?=) 16.Ng6+/– Rf7 17.Bc4 (17.Ne7 Qe7 18.0–0 a5) 17...Ned6 (17...a5 18.Ne7 Qe7 19.ba5 Ra5 20.Rb1=) 18.Bd3+/– f5 (18...a5 19.Ne7 Re7 20.a4) 19.Nfe5 Rf6 20.h3 (20.Ne7 Qe7 21.Qc5 Raf8) 20...Nf7 21.g4 (21.Ne7 Qe7 22.0–0 a5) 21...Ne5 (21...c5 22.0–0 cb4 23.Ne7 Qe7 24.ab4 A) < 24...Qb4 25.Nd7 (< 25.gf5 ef5 26.Kh2 Ne5 27.de5 Rc6=+) 25...Rg6 26.f3; B) 24...Be4=) 22.Ne5?? (22.Ne7 Qe7 23.de5 Rff8 24.gf5 ef5+–) 22...fg4?? (better is 22...c5 23.0–0 cb4 24.ab4 fg4 25.Bh7 Kf8=+) 23.Ng4+/– Rf7 24.Ne5 Rf6 25.Rg1 Nd6 26.d5! cd5 27.Bh7 Kf8 28.Ng6 Kf7? 29.Bf6 Bf6 30.Nf4 Ne4 31.Nh5 Rc8 32.Qd1 Ng5 33.Rc8 Qc8 34.Bc2 d4 35.e4?? (35.Rg3 Be4 36.Be4 Ne4=) ½–½. Vahl,Laurens – Niesert,Tom, NED–ch U16 op, 2000.

4.e3 Nf6 5.Bb5+/– Be7 6.Be2 0–0 7.Nf3 Bb7 8.0–0 d5 9.c4 dc4 10.Bc4 a5 11.Qb3 (11.b5 Na7+/–) 11...a4? (better is 11...ab4 12.ab4 Ra1 13.Ba1 Qd6=) 12.Qc2+/– Ba6?? (better is 12...Nb8+/–) 13.Ba6 Ra6 14.b5 Rb6 15.bc6 Nd5 16.Nc3 Nc3 17.Bc3 Rc6 18.Qa4 Rb6 19.Rfb1 Bd6 20.Rb6 cb6 21.Rb1 Bc5 22.d4 Bd6 23.Rb6 Qb6+= 24.Bb4 Bb4 25.ab4 Rb8 26.Ne5 Qc7 27.g3 h6 28.b5 Qc1 29.Kg2= Rc8 30.Nc6 Qb1?? 31.Ne7+– Kh7 32.Nc8 Qe4 33.f3 Qe3 34.b6 Qe2 35.Kh3 g5 36.b7?? Qf1 37.Kg4 f5 38.Kh5 Qh3 0–1. Fournier,Frederic (1925) – javo298 (1880), Active (2/0), 2005.

4.e4 d5 5.d3 Be7 6.Nd2 Nf6 7.f4 0–0 8.Ngf3 Bd6 9.e5 Be7 10.ef6 Bf6 11.Qc1 Bb2 12.Qb2... (26.) 1–0. Kucharkowski – Mussbach, Freital 1981.

4.e4 e5 5.d4 (5.Bb5!? Nf6 6.Nf3+/–) 5...ed4 6.Bb5 Bb7 7.Nd2 (7.Nf3+=) 7...a6 (7...a5!?=) 8.Bc4 (8.Bc6 dc6 9.Ngf3 c5+/–) 8...Nf6 9.Ndf3 Increases the pressure on d4 (better is 9.Ngf3!? Bd6 10.0–0+/–) 9...Ne4+= 10.Qe2 d5 11.Bd3 h6 (better is 11...Bd6!? 12.Be4 0–0 13.Bh7 Kh7 14.Qd3 Kg8=) 12.Nd4= Nd4 13.Bd4 Bd6 14.Bg7 Rh7 (better is 14...Rg8 15.Bd4 Rg2=) 15.Bd4+– Qh4 16.Be4 (better is 16.Rb1+–) 16...de4= 17.0–0–0 0–0–0 (17...Qg5!? 18.f4 Qf4 19.Kb1 f5=) 18.Kb1+= f5 (18...Bh2?? 19.g3 Qg5 20.Rh2+–) 19.g3 Qe7 20.g4?? (20.Nh3!?+=) 20...f4 (20...e3 21.f3 fg4 22.Be3–+) 21.Ba7 (21.h4 Kb8=) 21...f3 (21...Qh4 22.Bc5 e3 23.fe3 Bc5 24.Nf3 Qg4 25.Rd8 Kd8 26.Rg1 Bf3 27.Qd3 (27.Rg4?? Be2 28.Rg8 Ke7 29.ef4 Bd6–+) 27...Rd7 28.Rg4 Rd3 29.Rf4 Ra3 30.Rf3–+) 22.Qf1 Rg7 23.Re1?? (23.Qc4 Rd7+= (worse is 23...Rg4 24.Nf3 Qf6 25.Nd4+/–)) 23...Rg4?? (better is 23...Bb4 24.Re3 Ba3 25.Nf3 Bc5 26.Bc5 Qc5–+) 24.Nf3+= Qh7 (24...a5!?+=) 25.Qh3 h5 26.Ng5?? (26.Nd4 Qf7=) 26...Qg6 (better is 26...Qf5–+) 27.Be3= Be5 28.Rhg1 Kb8 29.Rg4 hg4 30.Qg4 Bh2 31.Bf4 Bf4 32.Qf4 Increasing the pressure on the isolated pawn on e4 32...Qb6 33.Ne4 a5 (better is 33...Qd4+/–) 34.Qf7?? (34.Nc5 ab4 35.ab4 Bc8+–) 34...Be4?? (better is 34...ab4 35.a4 Bc6=) 35.Re4+– Rd1 (35...Kb7 36.f4+–) 36.Ka2 ab4?? (36...Rd2 37.Qe8 Ka7+–) 37.Rb4 Qb4 (37...Kc8 38.Rb6 cb6 39.Kb3+–) 38.ab4 Kb7 (38...Kc8+–) 39.Qf3 c6 40.Qd1 1–0. rimazu (2020) – valerypavlovich (2105), net–chess.com, 2015.

4.e4 Nf6 5.Bb5 Ne4 6.Bc6 dc6 7.Nf3 a5 8.Qe2 Ng5 (8...Nf6 9.ba5 Ra5 10.0–0) 9.Ne5 Bb7? (9...Ba6 A) 10.Nc6? Qd5 (10...Be2?! 11.Nd8 Bb5 12.Nc3=) 11.Qg4 Qc6 12.Qg5 Qc2–+; B) 10.c4 ab4 11.ab4) 10.Qc4?? (better is 10.h4 ab4 11.hg5 Qg5 12.Qf3+–) 10...c5?? (better is 10...Qd5 11.Qg4 f6=+) 11.Qb5+– c6 12.Qb7 Rb8 (12...Qc8 13.Qc8 Rc8 14.ba5 f6+–) 13.Qc6 Ke7 14.Qc5 Ke8 15.Qa7 (better is 15.Qc6 Ke7 16.Qa4+–) 15...ab4 (15...f6 16.Nc6 Ra8 17.Qa5 Ra5 18.Nd8 Ra6+–) 16.h4 (16.Qa4 Ke7 17.Nc6 Kd6 18.Nd8 Nf3 19.gf3 Rd8 20.ab4 e5 21.Qa5 Ra8 22.Qe5 Kd7 23.Ra8 Bd6 24.Qb5 Ke6 25.Ra7 Re8 26.Qe8 Kf5 27.Qf7 Kg5 28.h4 Kh6 29.Bg7) 16...ba3 17.hg5 ab2 18.Qf7 1–0. Andreas – alias@, mySchach.de, 2005.

3.a3 f6

4.e3 a6 5.Nf3 e5 6.c4 bc4 7.Bc4 Nh6 8.0–0 Bb7 9.d4 e4 10.Nh4 (10.Nfd2!? Nf7+–) 10...d5+/– 11.Bb3 Ne7 12.g3 (12.Nc3!?+/–) 12...g5 13.Qh5 Nf7 14.Nc3 c6?? (better is 14...gh4!? 15.Ne4 Bg7+=) 15.Ng2 (15.Ne4!? Ng6 16.Ng6 hg6 17.Qg6 Rh6=) 15...Ng6 (15...Nf5!?+/–) 16.f3+– Nd6 17.f4 Bc8 18.g4 White intends f5 18...Nc4 (18...Kd7 19.Rac1 Rb8+–) 19.Bc4 dc4 20.f5 Kf7 (20...Rg8 21.Ne4 (worse is 21.fg6 hg6 22.Qh3 Qe7+–) 21...Qe7 22.Nc5+–) 21.fg6 Kg7 22.Nh4! (22.Ne4?! hg6 23.d5 gh5 24.Bf6 Qf6 25.Nf6 Bg4 26.Ng4 hg4 27.dc6 Bd6=) 22...gh4 (22...Be7 23.d5 Bg4 24.Qg4 hg6 25.Ng6 Kg6 26.Qf5 Kh6 27.dc6 Qc8 28.Qe4 Qd8+–) 23.g5 f5 (23...hg6 24.gf6 Qf6 25.Qh8 Kh8 26.Rf6 Bh6+–) 24.Ne4 h6 25.d5 Kg8 (25...c3 26.Bc3 Kg8 27.Nf6 Qf6 28.gf6 Bc5 29.bc5 Ra7 30.f7 Rf7 31.gf7 Kh7 32.Bh8 cd5 33.f8Q d4 34.Qhh6) 26.Nf6 Kg7 27.Nh7 (27.gh6 Rh6 28.Ng4 Kg8 29.Nh6 Bh6 30.Qh6 Qg5 31.Qg5 Be6 32.Qe7 c3 33.Bc3 Bd5 34.Qg7) 27...Kg8 28.gh6 Rh7 (28...Ra7 29.Nf6 Qf6 30.Bf6 Rh6 31.Qg5 cd5 32.Rf5+–) 29.gh7 Kh7 30.Qf7 Kh6 31.e4 Qg5 32.Kh1 h3 33.Bc1 f4 (33...Ra7 34.Qf8 Kh7 35.Bg5 Rb7 36.Rf4 cd5 37.Rh4 Kg6 38.Qf6) 34.Bf4 Qf4 (34...Ra7 35.Bg5 Kg5 36.Rg1 Bg4 37.Qf5 Kh6 38.Rg4 cd5 39.Qg6) 35.Rf4 c3 (35...Be7 36.Qe7 cd5 37.Rh4 Kg6 38.Rg1 Bg4 39.Rgg4) 36.Rg1 cd5 (36...Bg4 37.Rfg4 cd5 38.Rh4) 37.Rh4 1–0. croach (2360) – valerypavlovich (2120), net–chess.com, 2015.

4.e4 a6 5.Nf3 g5? (better is 5...Bb7) 6.Ng5!!+– fg5 (6...e6 7.Qh5 Ke7 8.Qf7 Kd6 9.Nh7 Bb7 10.Nf6 Nf6 11.Bf6 Ne5 12.Be5 Ke5 13.d4 Kd6+–) 7.Bh8 (7...Nf6 8.Bf6 ef6 9.Qh5 Ke7 10.Qh7 Ke8 11.Qg6 Ke7 12.Nc3+–; 7.Qh5 1–0. wlittle (2175) – foxie, net–chess.com, 2005.

3.a3 Nf6

4.e3 a6 5.Nf3 g6 6.c4 bc4 7.Bc4 d5 8.Be2 Bf5 9.d3 Qd6 10.Nbd2 e5 (10...Bd7 11.Nb3+=) 11.d4 (11.Qa4 Bd7 12.b5 Nd8 13.Be5 Qb6+–) 11...Nd7? (better is 11...ed4 12.Nd4 Nd4 13.Bd4 Rg8+/–) 12.de5+– Qe6 13.Rc1 Bg7 14.Ng5 Qe7 15.Nf7 Qf7 16.Rc6 Rf8? 17.Nf3 Be5 18.Ne5 (18.Ne5 Ne5 19.Be5+–) 1–0. Luettig,Hendrik – Stoephasius,Christian, Pinneberg–ch, 2005.

4.e3 Bb7 5.Bb5 e6 6.Nf3 Be7 7.Be2 0–0 8.0–0 d5 9.d4 Bd6 10.c4 Ne4 (10...dc4 11.Nc3+–) 11.Nbd2 (11.c5 Be7+–) 11...Nd2+– 12.Nd2 Ba6?? (better 12...dc4 13.Nc4 Qg5+–) 13.b5 Nd4 14.Bd4 (14.ba6?! Qh4 15.g3 Ne2 16.Qe2 Qg5+–) 14...Bb7 15.c5 Be7 16.c6 Bc8 17.a4 Bf6 18.Nf3 e5 (18...a6 19.Bf6 Qf6 20.Qd4+–) 19.Be5 Be5 20.Ne5 Re8 21.Qd4 Qf6 22.Nf3 Qg6 (22...Qd4 23.Nd4 (23.ed4?! Re2 24.Rfe1 Re1 25.Re1 Be6+–) 23...Kf8 24.Rfd1+–) 23.Rad1 (23.Qd5!? Be6 24.Qg5 Qg5 25.Ng5 Bb3+–) 23...Bh3 Threatening mate... how? 24.Nh4 Qg5 25.Bf3 (25.a5 Red8+–) 25...Be6 26.Qf4 Qf4 (26...h6 27.g3 Qf4 28.gf4+–) 27.ef4 f6 28.Bd5 Kf7 (28...Bd5 29.Rd5 Re4 30.Rd7 Rf4 31.Nf3+–) 29.f5 (better 29.Be6!? Re6 30.Rd7 Re7+–) 29...Bd5 30.Rd5 Rad8 31.Rd8 (31.Rdd1 Rd1 32.Rd1 Re4+–) 31...Rd8 32.g3 Rd4 33.Re1 Ra4 34.Rd1 Ra2 (34...Re4 35.Ng2 Rb4 36.Rd7 Kg8 37.Nf4 Rb1 38.Kg2 Rb5 39.Rc7+–) 35.Rd7 Ke8 36.Rc7 Ra1 37.Kg2 Rb1 38.Rg7 Rb5 (38...Kd8 39.Nf3 Rd1 40.Ra7+–) 39.Ra7 (39.c7 Rc5+–) 39...Rb6 (39...Rc5+–) 40.Ra8 Ke7 41.c7 Rc6 42.c8Q Rc8 43.Rc8 Kd6 44.Rh8 (44.Rh8 h6 45.Rh6+–) 1–0. BeepBeepImAJeep (2645) – marmm7 (1720), lichess.org, 2017.

4.e3 Rb8!?+=.

4.e3 d6 5.Bb5 e5 6.Bc6 Bd7 7.Ba8 Qa8 8.Nf3 e4 9.Nd4 c5 10.bc5 dc5 11.Nb3 Be7 (11...Bg4 12.Qc1+–) 12.0–0 (12.Bf6 Bf6 13.Nc3 Bf5+–) 12...0–0 13.c4 (13.f3 c4 14.Nd4 Rb8+–) 13...Qc6 14.Nc3 (14.d3 Bg4 15.Qc2 ed3 16.Qd3 Rb8+–) 14...Qd6 (14...Rb8 15.Nb5+–) 15.h3 (15.f3!? Be6 16.Rc1 ef3 17.Rf3 Bc4+–) 15...Be6 16.Qe2 (16.Rc1 Qd3 17.Na5 Bd8+–) 16...Bd8 (16...Qb6 17.Nb5 a6+–) 17.Nb5 Qc6 18.d3 a6 19.Nc3 ed3 (19...Qb6 20.Nc1 ed3 21.Nd3 Bc4 22.Rfd1+–) 20.Qd3 Bc7 21.Ne2 (21.Rfd1!? Rb8 22.Nd5 Nd5 23.cd5 Bd5 24.Qd5 Qd5 25.Rd5 Rb3 26.Rc5 Rb2 27.Rc7 g5+–) 21...Rd8 22.Qc2 Qd6 (22...Ne4 23.Rfd1+–) 23.Nf4 g5 (23...Qe7 24.Rfd1 Bd6 25.Bf6 Qf6 26.Ne6 fe6 27.Qe4+–) 24.Rad1 (24.Bf6!? gf4 25.Rad1 Qb6 26.Bd8 Bd8 27.Nc5 Bg5 28.Ne6 Qe6+–) 24...Qc6 (24...Qe7 25.Ne6 fe6 26.Bf6 Qf6 27.Nc5+–) 25.Bf6 (better 25.Qc3!? Bc4 26.Nh5 Bf1 27.Nf6 Kf8 28.Nh7 Ke7 29.Qf6 Qf6 30.Bf6 Ke8 31.Bd8 Be2 32.Bc7 Bd1 33.Nc5 Be2+–) 25...Rd1 26.Bg5 (better 26.Qd1 Bc4 27.Bg5 f6+–) 26...Rf1 27.Kf1 Bf4 28.Bf4 Qd7 (28...Qa4 29.Kg1 f6 30.Qc3+–) 29.Nd2 (29.Nc5 Bc4 30.Kg1 Qd5+–) 29...Bf5 (29...Qd8 30.Nf3+–) 30.Qc3 Bd3 31.Kg1 h5 (31...Qf5 32.Bd6 Qg6 33.Qe5+–) 32.Bh6 f5 33.Qf6 Be4 (33...Qf7 34.Qa6 Be2+–) 34.Ne4 fe4 35.Qg6 Kh8 36.Qe4 (better 36.Bg5 Qd1 37.Kh2+–) 36...Qd1 37.Kh2 Qd6 38.Bf4 Qh6 39.Bh6 (39.Bh6 Kg8 40.Qg6 Kh8 41.Qg7) 1–0. BeepBeepImAJeep (2645) – pimpualldy (1850), lichess.org, 2017.

4.e3 g6 5.Bb5+/– Bg7 6.Nf3 Rb8 7.Be2 0–0 8.d4 a6 9.c4 Na7 10.Nc3 c6 11.0–0 d6 12.Qc2 Bf5 13.Bd3 Bg4 14.Be2 Bf5 15.e4 Bg4 16.h3 Bc8 17.Rfd1 Qc7 18.e5 Nd7 19.ed6 ed6 20.c5 d5 21.Nb1 (21.Re1 Nb5+–) 21...Nb5 22.Bb5 (22.Re1!?+/–) 22...ab5+= 23.Nbd2 Nf6 24.Re1 Re8 25.Re8 Ne8 26.Re1 Bf5 27.Qd1 Nf6 28.Ne5 Ne4 29.Ne4 Be4 30.f3 Bf5 31.Qd2 Re8 32.Kf2 Be5 (32...Re7 33.Bc1+=) 33.Re5 Re5 34.de5 Be6 35.g4 (35.Qg5 Qb8+–) 35...Kg7 36.f4 Qd7?? (36...Qe7 37.Kg1+/–) 37.Qd3 h5? 38.f5!+– gf5 39.gf5 Bf5 40.e6 Kf8 41.ed7 Bd7 (41...Ke7 42.Qf5 d4 43.Bd4 Kd8 44.Bf6 Kc7 45.d8Q Kb7 46.Qfd7 Ka6 47.Qa5) 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

4.e4 a6 5.Nc3=.

4.e4 Ba6 5.a4 Ne4? (5...Nb4 6.ab5 Bb7+–) 6.ab5+– Bb5 7.Bb5 Nb4 8.Nf3 a6 9.Bc4 d5 10.c3 dc4 11.Qa4 Qd7 12.Qd7 Kd7 13.cb4 (13.Ne5 Ke6 14.cb4 c3 15.Nc3 Ke5 16.f4 Kd4) 13...Rb8 14.Ne5 (14.Bc3 c5 15.Ne5 Ke8 16.bc5 Nc5 17.Nc4 e6+–) 14...Ke8 15.Ra6 e6 16.Nc6 Rb5 (16...Rb6 17.Ra8 Kd7 18.Ne5 Ke7 19.Ra7+–) 17.Na3 (17.Nc3 Nc3 18.dc3 Kd7+–) 17...Rb6 (17...Rg5 18.Ra8 Kd7 19.Ne5 Ke7 20.Nac4+–) 18.Ra8 Kd7 19.Ne5 Ke7 20.Nac4 (20.Nec4?! Rb4 21.Ra7 Kd7+–) 20...Rb4 (20...Rb5 21.Nc6 Kd7 22.N4e5 Re5 23.Ne5 Ke7+–) 21.Nc6 Kd7 22.N4e5 Kd6 23.Nb4 (23...Kc5 24.Rb8+–) 1–0. Nemec,Zdenek – Crossman,Chris, CP–2003–00047, 2003.

4.e4 e5 5.Bb5 Nd4 6.Bd4 ed4 7.Nf3 c5 (7...a5 8.e5 Nd5 9.Nd4) 8.0–0 Be7 (8...Bb7 9.e5 Ne4 10.c3) 9.e5+– Nd5 10.c3 Qb6 11.Bc4 Bb7 (11...Nf4 12.Qc2 Qg6 13.Qg6 hg6 14.bc5) 12.bc5 (12.Qb3 Nf4 13.Bf7 Kf8) 12...Qc5 (better is 12...Bc5!? 13.cd4 Bd4 14.Nd4 Qd4) 13.Qb3+– dc3? (13...Rb8+–) 14.Qb7 0–0 (14...Nb6 15.Bd3 c2+–) 15.Qd5 (15...Rac8 16.Qc5 Rc5 17.d3+–) 1–0. pcmvr (2225) – reyr (2155), net–chess.com, 2006.

4.Nf3 a6 5.Nc3=.

4.Nf3 d5 5.e4 Ne4 6.Bb5 Bd7 7.0–0 Nb8 (7...a5 8.Nc3) 8.Qe2 c6 (8...a5 9.Nc3 Nc3 10.Bd7 Nd7 11.Bc3) 9.Bd3 Nd6 10.Re1 e6 11.Qe5 Be7? (better is 11...a5!?) 12.Qg7+– Rf8 13.Bh7 Nf5? (better is 13...a5+–) 14.Bf5 ef5 15.Ng5 f6 (15...Be6 16.Nh7 Nd7+–) 16.Qg6 Rf7 17.Qf7 1–0. weBNimzo (2100) – The Phoneguy, ChessWorld.net, 2003.

3.a3 Nh6

4.e3 e6 5.f4 f5 (5...a5 6.Bb5 Bb7 7.Nf3=) 6.Nf3 Be7? (better is 6...Rb8+=) 7.Bg7+– Rg8 (7...Bf6 8.Bh8 Bh8+–) 8.Bh6 Rg6 9.Bg5 Bg5 10.Ng5 Ke7 (10...h6 11.Nf3+–) 11.Nc3 Qg8 12.Nb5 h6 (12...Kd8 13.Nc3+–) 13.Nf3 (better is 13.Nc7 Rb8 14.Nf3 Qd8+–) 13...Rg2 (13...Kd8+–) 14.Bg2 Qg2 15.Rg1 Qh2 (15...Qh3 16.Nc7 Rb8 17.Rg3+–) 16.Nc7 (16.Nh2!? Rb8 17.Nc3 a5+–) 16...Rb8 (16...Qh5 17.Na8 Bb7+–) 17.Qe2 (better is 17.Nh2 Kd8 18.b5 Ne7+–) 17...Bb7 (17...Qe2 18.Ke2 Kd8+–) 18.Qh2 Na5 1–0. zobec – carrasclas, Live Game Caissa's Web, 2004.

4.e4 Rb8 5.Nc3.

4.e4 e5 5.Bb5 (5.Nf3 a6) 5...Bb7 (5...Nd4 6.Bd4 ed4 7.Qh5=) 6.d3 (6.Nf3 a5) 6...Bd6 (6...Nd4 7.Bc4 Qg5 8.g3) 7.Nf3 Ne7 (7...Nd4!? 8.Bc4 Qf6) 8.Be5 (better is 8.Ne5 0–0 9.0–0+–) 8...c6? (better is 8...Be5 9.Ne5 c6+–) 9.Bg7 (9.Bd6 cb5 10.Nc3 a6+–) 9...Rg8 10.Bc6?? (10.Bh6 cb5 11.0–0 Nc6+–) 10...Bc6? (better is 10...Nc6 11.Bh6 Qf6) 11.Bh6+– Rg6 12.Bg5 f6 13.Nbd2 fg5+/– 14.Nd4 Ba4 15.N4b3 Qb6 16.Nc4+/– Qc7 17.Qh5 0–0–0? 18.Nd6 Qd6 19.Qh7?? Qf6–+ 20.e5? Qe5 21.Kd2 Rh8 22.Qf7 Rg7 23.Qc4=+ Kd8 24.g3? Rf8 25.Raf1 Rgf7 26.Qc5=+ d5 27.d4?? Qe4 28.Qa5 Kc8–/+ 29.f4 Bc6?? 30.Qc5 gf4 31.Re1 Qh7?? 32.b5 fg3 33.hg3+– Rf2?? 34.Kc1 Qg6 35.Re7 Kd8 36.Rhe1 Re8 37.Re8 Be8 38.Qe7 Kc8 39.Qe8 Qe8 40.Re8 Kc7 41.Re7 Kd6 42.Ra7 Rf1 43.Kb2 Rg1 44.Rg7 Ke6 45.Nc5 Kf6 46.Rd7 Rg3 47.Rd5 Ke7 48.a4 Rg8 49.Kb3 Re8 50.a5 Rb8 51.c4 (51...Rh8 52.Rd7 Ke8 53.a6 Rh3 54.Ka4+–) 1–0. 1805DYDIDIDY – Gregor123, mySchach.de, 2005.

3.a4 ba4

4.b5 Nb4 5.e4+/– Nc2? 6.Qc2+– Bb7 7.Ra4 c6 8.Nf3 Nf6 9.Nc3 a6 (9...e6+–) 10.ba6 Bc8 11.e5 Ng4 (11...Nd5 12.Nd5 cd5 13.Bd4+–) 12.Rg4 Ba6 13.Ba6 Ra6 14.0–0 e6 15.Ne4 Ra2 16.Qb1 Ra5 17.Nd6 Bd6 18.ed6 Rb5 19.Bg7 Qb8 20.Bh8 Qd6 21.Rg8 Ke7 22.Qh7 Qf4 23.Re1 Ra5 24.Qg7 Rb5 25.Qf8 1–0. Fournier,Frederic (2470) – Albator (1760), echecsemail.com, 2010.

4.b5 Nb4 5.e4+/– c5 6.c3+– (6.Ra4?! Qb6+–) 6...a3 (6...a5 7.cb4 ab4 8.Ra4 Bb7+–) 7.cb4?? (better 7.Ra3 a5 8.cb4 cb4 9.Ra4+–) 7...ab2=+ 8.Ra4 c4 (8...e5 9.Qb3 Bb7 10.Qb2 cb4 11.Qe5 Qe7 12.Qe7 Be7 13.e5=+) 9.Bc4 Bb7 10.Qc2 (better 10.Nf3=+) 10...a5?? (10...e6 11.Bf1=+) 11.Qb2?? (better 11.ba6 Bc6 12.b5+–) 11...ab4= 12.Ra8 Ba8 (12...Qa8 13.d3=) 13.d3 (13.Nf3 e6 14.Qd4 Nf6=) 13...Qa5 (13...e6 14.Nf3=) 14.Nd2 (14.Nf3 e6=) 14...Nf6 (14...e6 15.Qd4=) 15.Ngf3 d5 16.ed5 Nd5 17.0–0 Nc3? The isolani on b5 becomes a target (better 17...e6=) 18.Ra1+– Ne2?? (better 18...Qd8 19.Qb4 Nd5 20.Bd5 Bd5+–) 19.Kf1 Qd8 20.Qa2 (worse 20.Ke2 e6+–) 20...Nc3 (20...Ng3 21.fg3 Bd5 22.Bd5 e6 23.Bc6 Ke7 24.Qa7 Kf6 25.Ne4 Kg6 26.Ne5 Kh6 27.Nf7 Kg6 28.Nd8 Rg8 29.Qf7 Kh6 30.Qe6 Kh5 31.Be8 g6 32.Qh3) 21.Bf7 Kd7 22.Ne5 Kd6 (22...Kc7 23.b6! Kd6 24.Qe6 Kc5 25.Nb3 Kb5 26.Ra5) 23.Ndc4 Kc5 24.Qa7 Kb5 25.Ra5 (25.Qa5 Qa5 26.Ra5) 0–1. GuestCFMD – rigarus, freechess.org, 2018.

4.b5 Nb4 5.e4+/– e6 6.c3 Qf6+–.

4.b5 Nb8 5.Ra4 Nf6 6.e3 (6.e4 a6+=) 6...g6 (6...a6!?+=) 7.Qf3 Bg7?? (better 7...d5+–) 8.Qa8+– Nc6 (8...a6 9.Qb8 ab5 10.Be5+–) 9.bc6 dc6 (9...0–0 10.Ra7 h6 11.Nf3+–) 10.Ra7 0–0 11.Nf3 (11.Qc6 Bd7 12.Qb7 Qb8+–) 11...Qd7 (11...Qd6 12.Be5 Qc5 13.Rc7 Qc2 14.Nc3 Qc1 15.Ke2+–) 12.Ne5 Qe6 (12...Qd6 13.Qc6 Nd5 14.c4 Ne3 15.c5 Qc6 16.Nc6+– (16.de3? Qc5 17.Bd4 Qc1 18.Ke2 Qb1–+; worse 16.fe3 Qc5 17.Ra1 Be5 18.Be5 Qe5–+)) 13.Qc6 (13.Bc4 Qf5 14.Qc6 Ne4+–) 13...Qd6 (13...Ng4 14.Qe6 Be6 15.Ng4+–) 14.Qd6 (14.Qc7 Nd5 15.Qd6 ed6+–) 14...cd6 (14...ed6 15.Nc6 Bd7 16.Ne7 Kh8 17.Na3+–) 15.Nc6 Bd7 16.Ne7 Kh8 17.Bf6 Bf6 18.Rd7 Re8 19.Nd5 Be7 20.Re7 Re7 21.Ne7 Kg7 22.Nd5 Kf8 23.Nbc3 Ke8 24.g4 Kd7 25.g5 Kd8 26.Nf6 (26.Bb5 f6 27.Ke2 Kc8 28.Bc6 fg5 29.Ra1 g4 30.Ra8) 26...Ke7 27.Ncd5 Ke6 28.Bh3 Ke5 29.f4 (29.d4) 1–0. FeegLood (2655) – therealDrivingcat, lichess.org, 2015.

4.Ra4 Rb8

4.b5 Rb8

5.c4 d5 6.bc6 Rb2 7.Nf3 Nf6 =+.

5.c4 a6

6.Qa4 e6 7.bc6 Rb2 8.Nf3 Nf6 =+.

5.e4 a6

3.a4 Ba6?

4.ab5 Bb5+/– 5.Na3 Ba4 6.b5 Nb8?? (better is 6...Rb8 7.e3 a6 8.bc6 Rb2+/–) 7.e3+– d5 (7...c6 8.Qg4 cb5 9.Bb5 Bb5 10.Nb5 Nf6+–) 8.Qg4 Bb5 9.Bb5 c6 10.Bg7 Nh6 11.Bh6 Bh6 12.Bd3 Nd7 13.e4 Qa5? 14.f4 e5 15.Nf3 Bf4 16.0–0 de4 17.Be4 Nf6 18.Qf5 Ke7 19.g3 Ne4 20.Qe4 Bg3 21.hg3 f6 22.d4 Rhg8 23.Qh7 Ke6 24.d5! cd5 25.Nd4! ed4 26.Rfe1 (26.Rfe1 Qe1 27.Re1 Kd6 28.Qe7 Kc6 29.Re6 1–0. Couspeyre,Thierry – Goti,Javier, OP–2012–0–02306, 2012.

4.e3 Bb7+=.

4.e3 e5?? 5.ab5+– (5.Bb5?! Bb7+=) 5...Bb5 6.Bb5 Qf6 (6...Nb4 7.Be5 c6 8.Be2+–) 7.Nf3 Bb4 (7...Nb4 8.Be5 Qg6 9.Na3+–) 8.Ra6 Nh6 (8...Nge7 9.Be5! Qg6 10.Bc7+–) 9.Ne5 Ne5 (9...Bd6 10.Nd7! Qb2 11.Bc6+– (11.Rc6? Qb5 12.Nf6 gf6–+)) 10.Rf6 gf6 11.Be5 fe5 12.Qh5 Rg8 (12...Rf8 13.Qh6 Rb8 14.Be2+–) 13.Qh6 Rg2 (13...c6 14.Qh7 Rf8 15.Ba6+–) 14.Qh3 (14.Bd7!? Kd7 15.Qh3 Kd6 16.Qg2 Rb8+–) 14...Rg6 15.Qd7 Kf8 16.Bc4 Rf6 17.Qc7 Rd6 (17...Bd6 18.Qd7 Be7+–) 18.Qf7 1–0. DEFFM – GuestQBHC, freechess.org, 2018.

4.e4+/– Nb4? 5.c3+– (5.Bb5?! Bb7 6.d3 a6=) 5...Nc6 6.ab5 Qb8? (6...Bb7 7.bc6 Bc6+–) 7.Ra6 (7.ba6?! Qb2 8.Na3 Rb8=) 7...e5 (7...e6 8.d4+–) 8.Nf3 Nf6 9.Qc2 (9...Nd8 10.Ne5+–) 1–0. Wall,Bill – Sagarmatha, Internet, 2003.

4.e4+/– Bb7!? 5.ab5 Nb8+/–.

4.e4+/– e5? 5.ab5+– (5.Bb5?! Nb4 6.Nf3 f6+–) 5...Nb4 6.ba6 (6.Ra6?! Na6 7.ba6 Bd6+–) 6...d6 (6...Qh4 7.d3 Bc5 8.Nh3+–) 7.c3 Nc6 8.Qa4 (8.Bb5 Nge7 9.Qa4 Qd7+–) 8...Qd7 9.Bb5 0–0–0 (9...Nge7 10.d4 ed4 11.cd4 d5+–) 10.Bc6 Qg4 11.Bb7 Kb8 12.Qb5 Qg2 13.Bc6 Kc8 14.Qb7 1–0. pcmvr – valerypavlovich (2210), net–chess.com, 2016.

3.a4 Nb4

4.ab5 Bb7 5.c3 Nd5 6.Nf3 e6 7.c4 Nb6 8.Qc2 h6 (8...a5 9.ba6 Ra6 10.Ra6 Ba6 11.e4+=) 9.e4 Nf6 10.d3 Be7? (better is 10...Bb4 11.Nbd2 a5+=) 11.c5+– Nc8 12.c6 dc6 (12...Bc6 13.bc6 0–0 14.Nbd2+–) 13.bc6 Rb8 (13...Qd6 14.cb7 Qb4 15.Nbd2 Qb7+–) 14.cb7 Bb4 15.Nbd2 Ne7 (15...Nb6 16.Ra7 Nbd7+–) 16.Qa4 c6 (16...Qd7 17.Qb4 c5 18.Qc5 Rb7 19.Bf6 gf6 20.Qc3+–) 17.Qb4 0–0 (17...a5 18.Qa5 Rb7 19.Qd8 Kd8 20.Ne5+–) 18.Ra7 Nd7 19.Ne5 (better is 19.Qd6 Ng6+–) 19...Nb6 (19...f6 20.Nd7 Qd7 21.Nb3+–) 20.Bd4 Nd7 21.Nd7 (better is 21.Qd6!? Ne5 22.Be5 Kh7+–) 21...Qd7 22.Be5 Rbd8 (22...c5 23.Qb6 Nc6 24.Bb8 Nb8 25.Qc5+–) 23.b8Q (23.b8Q Rb8 24.Bb8+–) 1–0. Farto Orozco,David (1785) – Alvarino Pita,Fernando, Cambados op, 2008.

4.ab5 Nd5? 5.e4+/– Nb6 6.d4 Bb7 7.Nd2 f6? (better is 7...Nf6 8.Bd3 g6+/–) 8.c4+– d6?! (8...d5 9.ed5 a6 10.ba6 Ra6 11.Ra6 Ba6+–) 9.c5 dc5 10.dc5 Nc8 (10...e5 11.Qc2+–) 11.c6 Bc6 12.bc6 Qd6 (12...e5 13.Qb3+–) 13.Ba3 Qc6 (13...Qe5+–) 14.Qh5 g6 15.Bb5 Qb5 (15...gh5 16.Bc6 Kf7 17.Ba8 Nh6+–) 16.Qb5 Kf7 17.Qd5 Kg7 18.Qa8 Nd6 19.Bd6 cd6 20.Ne2 e5 21.Ra7 Ne7 22.Qe8 Rg8 23.Re7 Be7 24.Qe7 Kh8 25.Qf6 Rg7 26.Qd6 Kg8 27.Qd8 Kf7 28.Nf3 Rg8 29.Qd7 Kf6 30.Ne5! Ke5 31.Qe7 1–0. pcmvr – samantho (1915), net–chess.com, 2015.

3.a4 Bb7

3.a4 Rb8

4.ab5 Rb5

4.c3 ba4

5.d4 a5 6.d5 ab4 7.dc6 a3 8.Bc1+–.

3.e3 a6

4.a3 d6 5.c4+= bc4 6.Bc4 d5 7.Be2 e6 (7...e5 8.Nf3 e4 9.Ne5 Ne5 10.Be5=) 8.d4 Bd6 9.Nf3 Nf6 10.0–0 0–0 11.Nbd2 Bb7 (11...Ne7 12.Ne5+=) 12.Nb3 Re8 13.Nc5 Bc5 14.bc5 e5 (14...Ne4 15.Rb1+=) 15.de5+/– Ng4 16.Bd3 Nge5 (16...Rb8 17.h3 Nge5 18.Ne5 Ne5 19.Bh7 Kf8 20.Bd3+/–) 17.Ne5 Ne5 18.Bh7! Kf8 (18...Kh7 19.Qh5 Double attack) 19.Qh5 (19.Rb1 Rb8+–) 19...Nd7 (19...Nc4 20.Bd4 g6 21.Bg6 fg6 22.Qg6 Re7+–) 20.Bg6 fg6 21.Qh8 Ke7 22.Qg7 Ke6 23.Qg6 Nf6 24.f4 Rf8 25.Rad1 Kd7 26.Qf5 Ke8 27.Qg6 Kd7 28.Qf5 ½–½. Fournier,Frederic – Fournier,Jean_Noel, Partie Libre (Active), 1995.

4.a3 d6 5.Nf3 e5 6.c4 bc4 7.Bc4 Bg4 (7...Nf6 8.Qc2 Bb7 9.0–0+=) 8.Bd5 Qd7 9.h3 Bh5 10.d4 ed4 11.Nd4 Bd1 12.Bc6 Qc6 13.Nc6 Ba4 14.Nd4 (14.Na5 Bd7+=) 14...Nf6 15.Nc3 Bd7 16.Ke2 Be7 17.Rhc1 0–0 (17...c5 18.Nc2=) 18.Rc2 ½–½. Fournier,Frederic – Fournier,Jean_Noel, Partie Libre (Active), 1995.

4.a3 e5 5.c4 bc4 6.Bc4 d5 7.Be2 Nf6 8.Nf3. Fournier,Frederic – Roy,Claude, Active Game Senlis FRA, 1997.

4.a3 e5 5.Be2=.

4.a3 f6 5.c4 bc4 6.Bc4 e5 7.Nf3 d5= 8.Be2 Bd6 9.Nc3 Nge7 10.d4 e4 11.Nd2 0–0 (11...Be6!?+=) 12.Qb3+/– Be6 (12...Kh8!?+/–) 13.Nde4!+– Kh8 (13...de4 14.Qe6 Double attack (14.Qe6 Pinning; 14.Qe6 Deflection; 14.Qe6 Decoy)) 14.Nd6 Qd6 15.0–0 Rfc8 16.Rfc1 Nd8 17.b5 (17.Bd3 Qd7+–) 17...ab5 18.Bb5 c5 (18...Rcb8 19.Qc2+/–) 19.dc5+– Rc5 20.a4 Rc7 21.Ba3 Qe5 22.Ne2 (22.Be7 Re7 23.Rd1 Rc7+/–) 22...Rac8 23.Nf4 (23.Be7 Re7 24.Nd4 Kg8+–) 23...Rc1 24.Rc1 Rc1 25.Bc1 Bg8 26.Bb2 Qc7 27.Qb4 Nb7 28.Nh5 Nf5 29.g4 Nh6?? 30.Nf6! (30.Nf6 Qc2 31.Ne8 Qd1 32.Kg2+–) 1–0. Fournier,Frederic – Fournier,Jean_Noel, Partie Libre (Active), 1995.

4.a3 f6 5.c4 bc4 6.Bc4 e5 7.Nf3 d5= 8.Be2 g6 9.d4 Bg7 10.de5 fe5 11.Nc3 (11.b5 Rb8 12.Qc2 Na7 13.Ne5 Nf6+/–) 11...Nge7 (11...e4 12.Nd2 Nge7 13.Qb3+/–) 12.0–0 (12.Qb3 Be6+=) 12...0–0 13.Na4 Bd7 (13...e4 14.Nd4+=) 14.Nc5+/– a5? (better is 14...Bg4!?+/–) 15.b5+– (15.Nd7?! Qd7 16.b5 Na7 17.Ne5 Qe6+/–) 15...Na7 16.Ne5 (16.Be5 Be5 17.Ne5 Bb5 18.Bb5 Nb5+–) 16...Be5 (16...Bf5 17.Bd4+–) 17.Be5 Bb5 18.Bb5 Nb5 19.Ne6 Qc8 20.Nf8 Kf8 21.Qf3 (21.Qf3 Qf5 22.Qf5 gf5 23.a4+–) 1–0. Fournier,Frederic – Fournier,Jean_Noel, Partie Libre (Active), 1995.

4.a4 Bb7 5.ab5 ab5 6.Nc3 e6 7.Nf3 Nf6 8.Ra8 Qa8 (8...Ba8!? 9.Nb5 Nb4+=) 9.Nb5+/– Nd5? (better is 9...Qd8 10.Bf6 Qf6+/–) 10.c4+– Qa2 (10...Ne3 11.fe3 (11.Nc7?! Kd8 12.fe3 Kc7+–) 11...Qd8 12.Be2+–) 11.cd5 Nb4 12.Nc7 Ke7 13.d6! Kd8 (13...Kd6 14.Ne8 Double attack) 14.Qc1 (14.Ne5 Bd6 15.Nf7 Ke7 16.Nd6 Qb2 17.Nb7 Nc2 18.Ke2 Rc8+–) 14...Bd6 (14...Bf3 15.gf3 Qb3 16.Ne6 fe6 17.Qc7 Ke8 18.Qc8 Kf7 19.Qd7 Kg8 20.Qc8 Nc2 21.Ke2 Qb5 22.d3+–) 15.Nb5 Bf8 (15...Be7 16.Bg7 Qc2 17.Qc2 Nc2 18.Kd1+–) 16.Qc7 (better is 16.Ne5 Ke8 17.Nc7 Ke7 18.Qc5 Kd8 19.Nf7 Kc8+–) 16...Ke7 17.Ne5 (17.Qb7?! Qb1 18.Ke2 Qd3 19.Kd1 Qc2 20.Ke1 Qb1 21.Bc1 Qc1 22.Ke2 Qc4 23.Kd1 Qc2 24.Ke1 Qc1 25.Ke2 Qc4 26.Ke1 Qc1=) 17...Qb2 (17...Bc6 18.Qd6 Kd8 19.Qb8 Ke7+–) 18.Qd7 (18.Qb7?! Qa1 19.Ke2 Qe5=) 18...Kf6 19.Qf7 (19.Qb7?! Qe5 20.d4 Qf5+/–) 19...Ke5 20.d4 (20.Qb7?! Qb1 21.Ke2 Qd3 22.Kf3 Qf5 23.Kg3 Qg5 24.Kh3 Qh5 25.Kg3 Qg5 26.Kh3 Qh5 27.Kg3 Qg5=) 20...Kd5 (20...Qd4 21.ed4 Kd5 22.Qf3) 21.Qf3 1–0. Sixty4 – Klm, playchess.de, 2005.

4.c4 bc4 5.Bc4 Nb4=.

4.c4 d5?? 5.cb5+– Nb4?? (better 5...ab5 6.Bb5 Bd7+–) 6.a3+– Bf5 (6...ab5 7.ab4 Ra1 8.Bb5 Bd7 9.Bd7 Qd7 10.Ba1 e6+–) 7.ab4 Qd6 (7...ab5 8.Bb5 Bd7 9.Bd7 Kd7 10.Nf3 Ra1 11.Ba1+–) 8.Ra6 Ra6 (8...Qd8 9.Qa4 Rb8 10.Be5+–) 9.ba6 Qa6 (9...c6+–) 10.Ba6 (10.Ba6 f6 11.Qa4 Kf7 12.Nc3+–) 1–0. GuestCMGY – GuestSMSH, freechess.org, 2019.

4.Nf3 d6 5.a4 ba4 6.c3 (6.Ra4 Bd7+–) 6...Bd7 7.Qa4 Ne5 8.Qd1 Bc6 (8...Nf6 9.Ne5 de5 10.Ba6+–) 9.Be2 (9.Ne5 de5 10.Na3 e6+–) 9...Nf6 10.0–0 g6 (10...Nf3 11.Bf3 d5 12.d3+–) 11.Ne5 (11.c4 Ned7+–) 11...de5 12.Ba6 Bg7 13.c4 Be4? (13...Qd6!?+–) 14.d3 (14.Be5 0–0 15.d4 Ra7+–) 14...Qd3?? (better 14...Bf5 15.e4 Be6 16.Bb5 Bd7 17.Ra8 Qa8 18.Be5 c6+–) 15.Bb5 (15.Bb5 c6 16.Ra8 Kd7 17.Bc6 Ke6 18.Ra5+–) 1–0. GuestDXKH – GuestZLLW, freechess.org, 2019.

4.a3 e6

5.Nf3 Bb7 6.d4 d5 7.Bd3 g6 (7...Bd6 8.c3=) 8.Nbd2 Bg7 9.0–0 Nge7 (9...Nf6 10.c3+=) 10.e4 (10.Nb3 Bc8+/–) 10...0–0 11.ed5 (11.e5 f6+=) 11...Nd5 12.c4 (12.Ne4 Ra7=) 12...Nf4+= Will d4 fall? 13.Be4 f5 14.Bc6 Bc6 15.c5 (15.Rb1 bc4 16.Nc4 Bb5=) 15...Re8 (15...g5 16.Ne1–/+) 16.Kh1 g5 17.h3 (17.Qb3!?+=) 17...g4 18.hg4 fg4 19.Ne1 (19.g3 Nd3 20.Bc3 Bd4 21.Bd4 Qd4 22.Kh2 gf3 23.Nf3–+) 19...Qh4–/+ 20.Kg1 Nh3?? (better is 20...Qh5 21.Ne4 Be4–+) 21.gh3= Qh3 22.f3 e5 23.de5+– Re5 24.Be5 Be5 25.Qe2?? Bd4–+ 26.Rf2 g3 (26...g3 27.Nf1 gf2 (27...Ba1?! 28.Rg2 Bd4 29.Ne3–+) 28.Qf2 Bf2 29.Kf2 Qh4 30.Kg2 Kf7–+) 0–1. Fournier,Frederic – Fournier,Jean_Noel, Partie Libre (Active), 1995.

5.Nf3 Bb7 6.d4 Nce7 7.Bd3 Nf6 8.0–0 g6 (8...Be4 9.Be2+=) 9.Nbd2+/– Bg7 10.Qe2 0–0 11.Rfc1 d5 1–0. Fournier,Frederic – Fournier,Jean_Noel, Partie Libre (Active), 1995.

5.Nf3 Bb7 6.d4 Nf6 7.c4 bc4 8.Bc4+=.

5.Nf3 f6 6.d4 d5 7.Bd3 Bd6 8.Nbd2 Nge7 9.0–0 0–0 10.Re1 (10.e4 Bf4+=) 10...Ng6 (10...e5 11.e4+=) 11.Bg6+= hg6 12.e4 Bb7 ½–½. Fournier,Frederic – Fournier,Jean_Noel, Partie Libre (Active), 1995.

5.Nf3 Nf6 6.c4 bc4 7.Bc4+=.

3.e3 Nb4

4.a3 Na6 5.Bb5 c6 6.Be2 Nf6 7.Nf3 e6 8.0–0 Bc5 9.d4 Bb6 10.Nbd2 d5 11.c4 0–0 12.c5 Bc7 13.Rb1 Re8 14.Bd3 Nb8 15.e4 Ba6 16.Ba6 Na6 17.e5 Nd7 18.Qc2 Nf8 19.Ba1 Ng6 20.Qa4 Nb8 21.Rb7 a5 22.Rfb1 Qd7 23.Nf1 Na6 24.Qa5 Reb8 25.Rb8 Rb8 26.Rb8 Nb8 27.Qd2 Qc8 28.a4 Qa6 29.Qc2 Nf4 30.Ne3 Qd3 31.Qd3 Nd3 32.Bc3 Na6 33.Kf1 Nab4 34.Ke2 Ba5 35.Nc2 Nc1 36.Kd1 Ncd3 37.Nb4 Bb4 38.Bb4 Nb4 39.Kd2 Kf8 40.a5 Ke8 41.Kc3 Na6 42.g4 h6 43.h4 Ke7 44.g5 h5 45.Nd2 f6 46.ef6 gf6 47.f4 f5 48.Nf3 Nc7 49.Ne5 Nb5 50.Kb4 Nd4 51.a6 Kd8 52.a7 Nc2 53.Ka4 1–0. Machete99 – guest671, ICC, 2002.

4.Bb5 a6 5.Be2 d5 6.a3 Nc6 7.Nf3 e5 8.Ne5 Qe7 9.Nc6 Qd7 10.Nd4 Bc5 11.Nb3 Be7 12.Bg7 Nf6 13.Bh8 Bb7 14.Bf3 c6 15.0–0 c5 16.d3 Qd6 17.Bf6 Bf6 18.d4 cd4 19.Nd4 h6 20.Ra2 Rb8 21.Qd3 Kd7 22.Bg4 Kd8 23.Nf5 Qf8 24.c4 Qg8 25.Bf3 Qg5 26.Bd5 Ke8 27.Bb7 Rb7 28.Nd6 Kf8 29.Nb7 Kg7 30.Nd6 Be5 31.Ne4 Qh5 32.g3 f5 33.Qd7 Kg6 34.Qe6 Kg7 35.Qe5 Kg6 36.Qe8 1–0. valpa – Maz, playchess.de, 2002.

4.Bb5 Rb8 5.a4 a6=+ 6.Be2 Bb7 7.Nf3 e6 8.0–0= Be4 9.d3 Bf5 10.h3 Nc6 11.Qc1 Rb7 12.Nbd2 Qb8 13.Rb1 Bb4?? 14.c3 Bc5 15.e4+– Bg6 16.d4 Bd6 17.Nh4 e5 18.Ng6 hg6 19.Nc4 Nf6 20.Qe3 Nh5 21.Nd6 cd6 22.d5 Na5? 23.Qd2 Rb6 24.Qc2 Nf4 25.Bg4 Nc4 26.Ba1 0–0 27.Rb6 Qb6 28.Rb1 Qa5 29.Bd7?? Na3–/+ 30.Qb3 Nb1 31.Qb1 Ne2 32.Kf1 Nc3 33.Qe1 Qc7 34.Bc6 Ne4?? 35.Qe4+/– f5 36.Qc4 Qb6 37.Qd3 e4 38.Qd4 Qb1 39.Ke2 Qc2 40.Ke1 Rf7 41.Qc3 Qb1= 42.Ke2 f4 43.f3?? Kh7?? 44.Bb2?? Qh1 45.Qd2 Qg2 46.Kd1 Qf3 47.Qe2 Qh3 48.Qe4 f3 49.Bd4 Qg2 50.Qe3?? f2–+ (51.Qf2 Rf2 52.Bf2 Qf2–+) 0–1. gtate (1980) – heyuneverno (1890), net–chess.com, 2004.

3.e4 Nb4

4.a3 Nc6 5.Bb5 (5.d4 Rb8=) 5...a6 (5...Rb8 6.Qh5=+) 6.Bc4 (6.Bc6 dc6 7.Nc3 Rb8+=) 6...Nf6 (6...Rb8 7.Ra2=) 7.e5 (7.Bf6 gf6 8.Nf3 f5 9.ef5 d5=) 7...Ne5?? (better is 7...Rb8 8.Ra2 Ng8=) 8.Be5+– (8...e6 9.Nc3+–) 1–0. Wall,Bill – Jedi, Internet, 2003.

4.Ba3 c5 5.c3=.

4.Bb5 Rb8 5.Nc3=.

4.Bb5 c6 5.Bc4 d5 6.ed5 cd5 7.Bb3 Rb8 (7...Nf6!?=) 8.Nf3+= Qc7?? (better 8...Nf6 9.Be5 Rb7+=) 9.Be5+– Qc5 (9...Qb6 10.Bb8 Qb8+–) 10.Bb8 Kd7 (10...Nc6 11.Bf4 Nf6+–) 11.Ne5 Ke6 12.Qe2 Ba6 13.Nd3 (13.Nd3 Kd7 14.Nc5 Kd8 15.Qe5 f5 16.Ne6 Ke8 17.Ba4 Bb5 18.Bb5 Nc6 19.Bc6 Kf7 20.Qf5 Nf6 21.Ng5 Kg8 22.Qe6) 1–0. GuestBJQR – GuestVVZK, freechess.org, 2020.

4.Bb5 c6 5.Bc4 d5 6.ed5 cd5 7.Qf3?? Bb7 (better is 7...dc4 8.Na3 Be6–+) 8.Bb3= Qc8 9.Nc3 d4?? (better is 9...Nf6 10.Ba4 Bc6=) 10.Qf7+– Kd7 (10...Kd8 11.Qf8 Kd7 12.Qf5 Kd8 13.Qa5 Ke8 14.Qb4 Bg2 15.Qd4+–) 11.Be6 Kc7 12.Bc8 (better is 12.Qf4 Kb6 13.Bc8 Nc2 14.Kf1 Rc8+–) 12...Rc8 (12...Nc2 13.Kf1 Rc8 14.Rc1 Ba6 15.Nge2+–) 13.Qf4 Kd8 (13...e5 14.Qe5 Kc6 15.Qe4 Kc7 16.Nb5 Kb6 17.Bd4 Ka6 18.Qe6 Ka5 19.Na3+–) 14.Qf8 Kd7 15.Qg7 (better is 15.Qf5 Ke8 16.Qb5 Kf7 17.Qb7 Nc2 18.Kd1 dc3 19.dc3 Nf6 20.Kc2 Rhd8+–) 15...Nc2 16.Kd1 Na1 (16...Nf6 17.Kc2 Rhg8 18.Qh6 Bg2 19.Nge2 Be4 20.Kb3 dc3 21.dc3 Bd5 22.Kc2 Be4 23.Kd2 Bh1 24.Rh1+–) 17.Qh8 (better is 17.Qd4 Ke6 18.Qh8 Nf6 19.Qc8 Bc8 20.Ba1 a6+–) 17...dc3 (17...Nf6 18.Qg7 (18.Ba1?! Rh8 19.f3 dc3+–) 18...Rg8 19.Qh6 (19.Ba1?! Rg7 20.f3 dc3+=) 19...Bg2 20.Nce2 Bh1 21.Ba1+–) 18.Ba1 (better is 18.Qd4 Ke8 19.Ba1 Rd8+–) 18...c2 (18...Nf6 19.Qg7 Rg8 20.Qg8 Ng8 21.f3+– (21.Bc3?! Bg2 22.Ke2 Bh1+/–; 21.dc3?! Bg2 22.c4 Bh1+–)) 19.Kc1 Bg2 (19...Nf6 20.Qg7 Rg8+–) 20.Qd4 Ke8 (20...Kc7 21.Qa7 Kd6 22.Qd4 Bd5 23.Ne2+–) 21.Qg4 Bh1 22.Qc8 Kf7 23.Qc4 (23.Qf5!? Ke8+–) 23...Kf8 24.Qf4 Nf6 25.Qb8 (better is 25.Bf6 ef6 26.Qf6 Kg8+–) 25...Kf7 26.Qa7 Ne4 27.f3 Nf2 28.Qf2 Ke8 29.Kc2 (29...Kd7 30.Qf1+–) 1–0. Taulien,Christian – Uli,Ulrich, remoteschach.de, 2003.

2.Bb2 d5

3.a3 Bb7 4.e3 Nf6 5.Bb5 c6 6.Be2 e6 7.Nf3 Nbd7 8.0–0 Ne5?? 9.d4 (better 9.Ne5 Be7 10.Nc3+–) 9...Neg4 (better 9...Nf3!? 10.Bf3 a5+=) 10.h3 Nh6 11.Nbd2 Bd6 12.c4 Be5?? (better 12...0–0+–) 13.de5 (13.de5 Nd7 14.Rb1+–) 1–0. BeepBeepImAJeep (2620) – AshlD, lichess.org, 2016.

3.a3 f6 4.Nf3 (4.e4!? c6 5.ed5 Qd5 6.Nc3 Qe6 7.Be2+=) 4...e5= 5.e3 c5 (better is 5...c6!?=) 6.bc5 a6 7.d4 e4 8.Nfd2 f5 (8...Nc6 9.a4 b4 10.Be2+/–) 9.c3 (9.a4 ba4 10.c4 Nf6+–) 9...Nf6 10.Be2 g5 (10...Be7 11.a4 ba4 12.0–0+/–) 11.0–0 g4 (11...Nc6+/–) 12.g3 (better is 12.a4!? ba4 13.c4+–) 12...h5+= 13.Re1 (13.a4 ba4 14.c4 h4+/–) 13...Nc6 14.Bf1 Nd7 Black intends h4 (better is 14...h4!?=) 15.a4+/– h4? (better is 15...ba4!? 16.c4 Nf6+/–) 16.ab5+– hg3 17.fg3 Ncb8 18.ba6 Na6 19.c4 Bb7? 20.cd5 Bd5 21.Ra6 Ra6 22.Ba6 Qg5 23.Bb5 Qh5 24.Re2 Be7 25.Nc3 Bf7 26.c6 Nb6 27.c7 Kf8 28.Nf1 White prepares d5 28...Kg7 29.Na4 Na4 30.Ba4 Rc8 31.Qc2 Be6 32.d5 Kf7 33.de6 Ke6 34.Qc4 (34.Qc4 Kd6 35.Rd2) 1–0. Fournier,Frederic (1640) – michloun (1635), Active, 2006.

3.a4 Nc6 4.ab5 Nb4 5.c3 Na6 6.ba6 c5 (6...Rb8 7.Qc1+–) 7.e3 (7.c4 Qb6 8.Be5 f6+–) 7...Qb6 8.Qc2 (8.Bc1 Nf6+–) 8...g6 (8...Rb8 9.Ba3 c4 10.Nf3+–) 9.c4 Bf5 (9...d4 10.Na3 Bf5 11.Qa4 Bd7+–) 10.e4 Be4 (10...d4 11.ef5 Nf6 12.fg6 fg6 13.Na3+–) 11.Qa4 Kd8 12.Bh8 (better 12.Bc3 Bc2 13.Qc2 Qe6 14.Be2+–) 12...Nh6 (12...d4 13.d3 Bc6 14.Qa3+–) 13.Nc3 (better 13.Bc3 Bc2 14.Qc2 Qe6 15.Be2 d4 16.Ba5 Ke8 17.Qa4 Qd7+–) 13...Bf5 (13...Qe6 14.Nge2 Qd7 15.Qa2+–) 14.Nd5 Qb2 15.Qa5 (better 15.Bb2 Rc8 16.Bc3+–) 15...Kd7 16.Qc7 Ke6 17.Qc6 1–0. GuestGWDQ – GuestQRNM, freechess.org, 2019.

3.a4 Bd7 4.ab5 Bb5 5.f4 (5.Nc3!? Bc6 6.e3+=) 5...e6 6.Nf3 Bb4?? (better 6...Nf6 7.Nc3 Bd7=) 7.Bg7+– Nf6 8.Bh8 Bd6 9.Nc3 Bc6 (9...Ba6 10.Ra4+–) 10.e3 h6 (10...Kf8 11.Nd4 Kg8 12.Bf6 Qf6 13.Nc6 Nc6 14.Nb5+–) 11.Bd3 e5 (11...Kf8+–) 12.fe5 d4 (12...Be7 13.Bf6 Bf6 14.ef6+–) 13.Bf6 Qd7 14.Nd4 Bg2 15.e6! fe6 16.Bg6 Kf8 17.Qh5 (17.Qh5 Kg8 18.Qh6 Bg3 19.hg3 Qh7 20.Qh7 Kf8 21.Ne6) 1–0. pcmvr – nando, net–chess.com, 2018.

3.Nc3 a5!?=.

3.Nc3 c6 4.d4 Nf6 5.Qd3 Ne4 (better 5...e6–/+) 6.Ne4+= e6?? (better 6...de4 7.Qe4 a5+=) 7.Nc5+– Bc5 (7...a5 8.a3+–) 8.bc5 0–0 9.Nf3 Qa5 10.Bc3 b4 (10...Qa4 11.Bd2+–) 11.Bb2 (11.Bd2 Nd7+–) 11...b3 12.Bc3 b2 13.Rb1 (13.Ba5 ba1Q 14.Kd2 Qa2–+) 13...Qa2 14.Rb2 Qa1 15.Kd2 Na6 (15...Qa6 16.Qa6 Ba6 17.e3 Bf1 18.Rf1+–) 16.Rb3 (better 16.Rb5! Qa2 17.Ra5 Qb1 18.Ra6 Ba6 19.Qa6 Rac8+–) 16...Qa4 17.e3 (better 17.Rb1 Nc7 18.Ra1+–) 17...Bd7 (17...Nc7 18.Rb4 Qa3+–) 18.Be2 (better 18.Qa6 Qa6 19.Ba6 Bc8+–) 18...Qc4 (18...Bc8 19.Ng5 f5 20.Ra1+–) 19.Ng5 (better 19.Qc4!? dc4 20.Bc4 Nc7+–) 19...Qd3 20.Bd3 h6 21.Nf3 Nc7 (21...Nb8+–) 22.Rb7 Rac8 23.Ra7 (better 23.Ba5 Ne8 24.Rd7 Nf6 25.Ra7 Ra8 26.Ra8 Ra8+–) 23...Nb5 (23...Be8+–) 24.Bb5 cb5 25.Rd7 1–0. Tot0_93 – anonym1337, lichess.org, 2020.

3.Nc3 d4 4.Nb5+= Bd7? (better is 4...e5!? 5.c3 a5+=) 5.Nd4+– 1–0. ghorn (2250) – irod, net–chess.com, 2013.

3.d3 e6 4.a3 Bb7 (4...a5 5.ba5 Nf6 6.Nd2=+) 5.Nd2 c5 (better 5...a5!?=) 6.bc5+= Nc6 7.Ngf3 Nf6 8.d4 a5 (8...Be7 9.e3 a6 10.a4+–) 9.e3 b4 10.ab4 ab4 11.Bb5 Be7 12.Ne5 Rc8?? (better 12...Qc8+–) 13.Ra7+– Ba8 (13...0–0 14.Rb7 Ne5 15.de5+–) 14.Ra8! 0–0 (14...Ra8 15.Bc6 Double attack (15.Bc6 Deflection; 15.Bc6 Decoy; 15.Bc6 Remove defender; 15.Bc6 Overloading)) 15.Nc6 (15.Nc6 Qd7 16.Ra7+–) 1–0. Pierre – Mercator, internet, 2020.

3.e3 a6 (--> 1.b4 d5 2.Bb2 a6 3.e3 b5).

3.e3 Ba6 4.Nf3 f6 5.Na3 e5 6.c3 Nc6 7.Nb5 Qb8? (7...Bc8 8.d4 e4 9.Nd2+/–) 8.a4 (8.Nc7 Qc7 9.Ba6 Bd6+–) 8...e4 9.Nh4 Be7? (9...Nge7 10.Nc7 Qc7 11.Ba6+/–) 10.Nc7! Qc7 11.Ba6 g5? (11...g6 12.0–0+–) 12.Nf5 (better is 12.Qh5 Kd7 13.Ng6 hg6 14.Qh8 Qb6+–) 12...Qd7 13.Ne7 Nge7 14.b5 (better is 14.0–0!?+–) 14...Nb8+/– 15.0–0 0–0 16.Ba3 Rf7 17.Qb3 h5 (better is 17...Na6 18.Be7 Re7 19.ba6 Re6+–) 18.Be7 Re7 19.c4 (19.Bc8 Qd6+–) 19...d4? (better is 19...Na6 20.ba6 dc4 21.Qc4 Kg7+–) 20.c5 Kh8 21.c6 Qe6 (21...Nc6 22.bc6 Qc6+–) 22.Qb4 (better is 22.Qe6 Re6 23.Bb7 Nc6 24.Ba8 Nb4+–) 22...d3?? (22...Na6 23.ba6 Rd8 24.Rac1 de3 25.fe3+–) 23.Qd4 (better is 23.Bb7 Nc6 24.bc6+–) 23...Na6+/– 24.ba6 Rc8 25.Rab1 Rc6 26.Rb8 Re8 (better is 26...Kg7!?+/–) 27.Qa7+– Rb8 28.Qb8 Kh7?? (28...Rc8 29.a7 Qc6+–) 29.a7 Rc8 30.Qb7 Kh6 31.a8Q Ra8 32.Qa8 Qg4 (32...h4 33.Qd8 g4 34.Qh8 Kg6 35.Qh4+–) 33.f3 ef3 34.Rf3 h4 (34...Kg7 35.Qa7 Kg6+–) 35.Qh8 Kg6 36.Qg8 Kh5 37.Qh8 Kg6 38.Qf6 Kh7 39.Qe7 Kg6 40.Rf6 Kh5 41.Qh7 1–0. chevin – cheeze14, Live Game Caissa's Web, 2004.

3.e3 Bb7 4.Nf3 Qd6 5.Bb5 c6 6.Be2 g6?? (better 6...Qb4 7.Nc3 Ba6+=) 7.Bh8+– f6 (7...Qb4 8.a3 Qd6 9.Be5+–) 8.a3 (8.c4 Nh6 9.c5 Qe6+–) 8...Qe6 (8...Nh6+–) 9.Nd4 Qf7 10.Bg4 (better 10.Nb3+–) 10...Nh6 (10...h5 11.Ne6 hg4 12.Nc7 Kd8 13.Na8 Qh7 14.Qg4 Ba8+–) 11.Be6 Qg8 (11...Bc8 12.Bf7 Nf7 13.Bf6 ef6 14.b5+–) 12.Bg8 Ng8 13.Ne6 Kf7 14.Nd8 Ke8 15.Nb7 Nd7 16.c4! Kf7 (16...dc4 17.Na5 Double attack (17.Na5 Decoy)) 17.cd5 Bh6 18.dc6 Nb6 19.Qb3 e6 20.Nd6 (20.c7!? Ke7 21.Nd8 Kd7 22.Qe6 Kc7 23.Qg8 Rd8 24.Qh7 Nd7 25.Bf6 Bf8+–) 20...Ke7 21.Nb5 Kd8 22.Qe6 Ne7 (22...Bf4 23.ef4 Rc8 24.Bf6 Nf6 25.Qf6 Ke8 26.Nd6) 23.c7 Ke8 24.Nd6 Kf8 25.Qf7 1–0. GuestQCZL – haraguest, freechess.org, 2017.

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

3.e3 d4? 4.Bd4+– f6 (4...Bd7 5.Nf3+–) 5.Bb5 c6 6.Bc4 e5 7.Bc3 Qb6 (7...Nd7 8.e4+–) 8.Bd3 (8.Nf3!? Bb4 9.a3 Bc3 10.Nc3 Nd7+–) 8...Bb4 9.Qh5 g6? (9...Kf8 10.Ne2 Nh6 11.Bb4 Qb4+–) 10.Bg6! hg6 (10...Kd8 11.Ne2+– (11.Bh7?! Bc3 12.Nc3 Qc7=)) 11.Qh8 Kf8 12.Nf3 Bc3 (12...Bf5 13.Qh7+–) 13.Nc3 (13.dc3 Qb2 14.Nh4 Bf5= (14...Qa1?? 15.Ng6 Kf7 16.Qh7 Ke6 17.0–0+–)) 13...Qb2 (13...Qc7 14.Rb1+–) 14.0–0 Qc2 (14...Qb7 15.Qh4+–) 15.Nd5! Be6 (15...cd5 16.Rac1 Combination) 16.Nf6 Ke7 (16...Nd7 17.Nd7 Bd7 18.Ne5 Be8+–) 17.Qg7 Kd6 18.Ne8 Kc5 19.Qf8 Kb6 (19...Kb5 20.Rfb1 Bb3 21.Rb3 Qb3 22.ab3 a5 23.Nc7 Kb6 24.Na8 Ka7 25.Qc8 Na6 26.Ra5 Nf6 27.Ra6) 20.Qb4 Ka6 21.Nc7 1–0. GuestKGXW – GuestKVFK, freechess.org, 2020.

3.e3 Qd6 4.a3 a6 5.Qf3 (5.Nf3 Nd7=) 5...e5 6.d3 (6.e4 d4=) 6...Be6 (6...Nf6 7.Qg3 Nbd7 8.Nd2=) 7.Nd2 (7.c4 Nc6=) 7...f5 (7...a5 8.c4=) 8.Nb3 (8.c4 Nc6+=) 8...Nf6= 9.Nh3 (9.Nc5 Nbd7 10.Ne6 Qe6=) 9...h6 (9...Nbd7 10.Ng5=) 10.Nc5. jaddwarrior – rgp, ChessWorld.net, 2012.

3.e3 f5 4.Bb5+– Bd7 5.Qh5 (5.Bd7 Nd7 6.Nf3 e6+–) 5...g6 6.Bd7 (6.Qh4 Nf6 7.Be2 a5+–) 6...Nd7 7.Qe2 Ngf6 (7...e5 8.Nf3 Bd6 9.c4+–) 8.Nf3 e6 (8...Bg7 9.0–0+–) 9.Nd4 Bb4? (better 9...Qe7 10.Nc6 Qf7+–) 10.Nc6+– (10.Ne6?! Qb8+–) 10...Qc8 11.Nb4 Qb7 (11...Rb8 12.Bf6 Nf6 13.Nc6+–) 12.Bf6 Nf6 13.Nd3 (13.Na6 0–0 14.Nc3 e5+–) 13...Nd7 (13...Rb8 14.0–0+–) 14.Nc3 Qc6 (14...c5 15.Rb1 Qc6 16.0–0+–) 15.Nb4 (15.Rb1 0–0+–) 15...Qb7 (15...Qd6 16.Na6 0–0 17.Rb1+–) 16.Rb1 Qc8 (16...Nb6 17.Qb5 Kf7 18.Nc6+–) 17.Nc6 Nb6 18.0–0 (18.Qb5 Qd7+–) 18...Qd7 19.Ne5 Qg7 (19...Qd6 20.d4+–) 20.Qb5 Kf8 21.f4 (21.d4 Qe7+–) 21...g5 (21...Qe7 22.a4+–) 22.Qc6 Rc8 (22...Re8+–) 23.Qe6 gf4 (23...Re8 24.Qf5 Kg8 25.Rb6 ab6 26.Nd5 Re5 27.fe5 h5+–) 24.Qf5 Kg8 25.Qe6 Kf8 26.Rf4 (26.Rf4 Qf6 27.Rf6 Kg7 28.Qf7) 1–0. DEFFM – elhursaen, freechess.org, 2018.

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

3.e4 a5+=.

3.e4 c6.

3.e4 Nf6 4.e5+/– (4.Bb5?! c6 5.e5 cb5 6.ef6 ef6 7.Qe2 Qe7=) 4...Ng4 (4...Nfd7 5.e6 Nf6 6.Bb5 c6 7.ef7 Kf7 8.Ba4+/–) 5.Bb5 c6 6.Be2 Ne5? (better is 6...Nh6+/–) 7.Be5+– Na6 (7...f6 8.Bc3+–) 8.b5 Nc5 (8...f6 9.Bg3 (9.ba6?! fe5 10.Nc3 e4+–) 9...Nb8 10.d4+–) 9.bc6 f6 10.c7 Qd7 11.Nc3 fe5 (11...a6 12.Bg3 Qc6+–) 12.Bb5 Ne4 (12...Qb5 13.Nb5 Nd7 14.Rb1+–) 13.Qh5 (13...g6 14.Bd7 Bd7 15.Qe5+–) 1–0. market (2265) – NN, GameColony.com, 2002.

3.Nf3 c6 4.e3 Nd7 5.a4 ba4 6.Ra4 Nb6 7.Ra1 Bg4 8.h3 Bd7 9.Ne5 Qc7 10.Nd7 Qd7 11.d4 e5 12.c3 ed4 13.Qd4 Qf5 14.Bd3 Qg5 15.0–0 Qe7 16.Qb6 ab6 17.Ra8 Kd7 18.Ra7 Kd6 19.Re7 Ke7 20.Nd2 b5 21.Ra1 Ke6 22.Nf3 f6 23.Nd4 Kd7 24.Ra7 Ke8 25.Nc6 Ne7 26.Bb5 Kf7 27.e4 de4 28.Nd8 Kg6 29.Be8 Kg5 30.Nf7 Kh5 31.Nh8 Kg5 32.Bc1 Kf5 33.Ra8 e3 34.Be3 Nd5 35.Bd7 Ke4 36.Bc6 Bd6 37.Ra5 Kf5 38.Bd5 h5 39.Bf7 Be5 40.f3 h4 41.g4 hg3 42.Ng6 g2 43.Ne7 1–0. Bonetti,Shane – ProphetX (1745), ICC, 2002.

3.Nf3 f6 4.e3 c6 5.a4 e5 6.ab5 Bb4 7.Ba3 (7.Ra4 a5 8.ba6+/–) 7...a5?? (better is 7...Ba3 8.Ra3 Ne7=) 8.Bb4+– a4 (8...Ne7 9.Bc5+–) 9.Na3 (better is 9.c4 Ne7+–) 9...Ne7 10.bc6 (10.c4 0–0+–) 10...Nec6 (10...Nbc6 11.Bb5 Bd7 12.Bc5+–) 11.Bb5 Ba6 (11...Bd7 12.Bd6 Ne7+–) 12.0–0 (better is 12.Ba4 Bf1 13.Rf1 Ra4 14.c3+–) 12...Bb5+/– 13.Nb5 Nb4 14.c3 Nd3 15.Qc2 (15.Ra4?! Nb2 16.Ra8 Nd1 17.Rd1 0–0=) 15...e4 16.Nfd4 Qd7 17.Ra4 Ra4 18.Qa4 0–0 19.Rb1 Nc6 20.Na3 Rc8 21.Rb6 Nb2?? (better is 21...Nde5 22.Qb5 Rc7+/–) 22.Qb5 Qg4 23.f3 ef3 24.Nf3 Ne5 (24...Qd7 25.Qb2 h6 26.Qb5+–) 25.Qd5 (25.Qb2? Nf3 26.Kf1 Nh2 27.Ke1 Qg2–+) 25...Kf8 26.Qd6 Kf7 (26...Kg8 27.Ne5 fe5 28.h3+–) 27.Qe5! (27.Rb2?! Nf3 28.Kf2 Ne5+–) 27...Re8 (27...fe5 28.Ne5 Double attack (28.Rb5 Decoy)) 28.Qd5 (28.Qd5 Kg6 29.Rb7+–) 1–0. phildo (1830) – jrodolfo, gameknot.com, 2013.

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

3.g3 e6 4.a3 Nc6 (4...a5 5.Nf3=+) 5.Bg2 e5 (5...a5!?=) 6.Nc3 Bg4 (6...Nge7!?) 7.Bd5+/– Nd4 (7...Nge7!? 8.Bg2 Rb8) 8.Ba8+– Qa8 9.f3 Bf5 10.d3 Be7 (10...Bd7 11.e3 Ne6 12.d4+–) 11.e4 (11.e3!? Nc6+–) 11...Bd7 12.Nd5 Bc6?? (12...Bd6+–) 13.Nc7 (13...Kd8 14.Na8 Ba8 15.c4+–) 1–0. Pawno Paul – arian1230, ChessWorld.net, 2005.

3.a4 ba4

4.Ra4 (--> 2.a4 ba4 3.Ra4 d5 4.Bb2).

4.e3 Bd7=.

4.Nf3 a5 5.Ra4 c6+=.

4.Nf3 a6 5.e3 e6 6.c4 Nf6 (6...Bd7 7.cd5 ed5 8.Ne5+=) 7.Ne5 (better is 7.Qa4 Nbd7 8.Bd4+/–) 7...Bb4?? (better is 7...Bd7 8.Nd7 Nbd7 9.Qa4 dc4+=) 8.Qa4+– Nfd7 (8...Nbd7 9.Qb4 Rb8 10.Qa5+–) 9.Qb4 Ne5 10.Be5 1–0. phildo (1845) – pablo38, gameknot.com, 2014.

4.Nf3 Nf6 5.e3 Bb7 (5...e6 6.Ra4 c5 7.b5=) 6.c4 (6.Ra4 e6+=) 6...e6 (6...dc4 7.Bc4 e6 8.Qa4 Nbd7 9.Be2=) 7.Qa4 Nbd7 (7...c6 8.Ne5+=) 8.c5+/– Be7 (better is 8...c6!?+/–) 9.c6+– Nb6 10.cb7 Na4 11.Bb5 Kf8 12.ba8Q (12.ba8R Qa8 13.Ra4 c6+–) 12...Qa8 13.Ra4 c5 (13...c6 14.Be2+–) 14.bc5 Bc5 15.0–0 Ke7 (15...Ne4 16.Nc3+–) 16.Rc1 Rc8 17.Ba6 (17.Rc5 Rc5 18.Ba3 Ne4+–) 17...Rc7 (17...Rc6 18.Ne5 Rb6 19.Rc5 Rb2 20.Nc3+–) 18.Ba3 Ne4 19.d4 Qc6 20.Bc5 Nc5 21.Rc5 Qa4 22.Rc7 Kf6 23.Bf1 a6 24.Ne5 (24.Ne5 Qe8 25.Ba6+–) 1–0. Kucharkowski,Jens – Kupec,Jan, CiF, 2006.

3.a4 c6

4.ab5 cb5 5.e3 a6 6.Bb5! Bd7 (6...ab5 7.Ra8 Pinning (7.Ra8 Deflection)) 7.Bd7 Qd7 8.Nf3 Qc6 1–0. DEFFM – GuestDBVL, freechess.org, 2018.

4.ab5 cb5 5.e3 Nc6 6.Bb5 Bd7 7.Nf3 (7.Bc6!? Bc6 8.Nf3+/–) 7...Nb4+= 8.Bd7 (8.Be2 Nc6+=) 8...Qd7 9.0–0 Nf6 (9...e6 10.d3+=) 10.c4 e6 (10...dc4 11.Ne5 Double attack (11.Ne5 Decoy)) 11.Ne5+/– Qd8 (11...Qb7 12.Qa4 Kd8 13.Bc3+–) 12.Qa4 Ke7?? (better is 12...Nd7 13.Bc3 Rb8+/–) 13.Qb4 (13.Qb4 Ke8 14.Qb7+–) 1–0. Wall,Bill – Vegeta, chess.com, 2008.

4.ab5 cb5 5.e3 Bd7 6.Na3 a6 7.Nb5+– Nc6 (7...ab5 8.Ra8 Pinning (8.Ra8 Deflection; 8.Ra8 Clearance); 7...Bb5 8.Bb5 Double attack) 8.Nd4 Nb4 9.c3 e5 (9...Nc6!?+=) 10.cb4+– ed4 11.Bd4 (11.Ra6?! de3 12.Ra8 ef2 13.Kf2 Qa8=; 11.Ba6?! de3 12.Qe2 Rb8 13.Qe3 Ne7+–) 11...Nf6 (11...Ne7 12.Qb3 a5 13.ba5 Ra5 14.Rb1+–) 12.Qb3 Rb8 (12...a5 13.ba5 Ra5 14.Ra5 Qa5 15.Nf3+–) 13.Bc3 (13.Bf6 Qf6 14.Ra6 Qf5+–) 13...a5 (13...d4!? 14.ed4 a5+–) 14.b5 Bb4 (14...Ra8 15.Nf3+–) 15.Bb4+– Bb5?? (better 15...ab4 16.Qb4 Ne4+–) 16.Bb5 (16.Ba5!? Bf1 17.Bd8 Rb3 18.Bf6 Bd3+–) 16...Rb5 17.Qa4 Qd7 18.Bc3 (18.Rc1 ab4 19.Qa8 Qd8+–) 18...Rb1 (18...Ne4 19.Qd4 Qf5 20.f3+– (20.Qg7 Qf2 21.Kd1 Nc3 22.Qc3 Qf1 23.Kc2 Qf5 24.d3 0–0+–)) 19.Ke2 Qa4 (19...Ra1 20.Qa1 Nh5 21.Qa5+–) 20.Ra4 0–0 (20...Ke7 21.Ra5 Rd8 22.f4+–) 21.Ra1 (better 21.Ra5 Ne4+–) 21...Rfb8 (21...Ra1 22.Ba1 Ne4+–) 22.Nf3 (22.Nf3 Rh1 23.Rh1+–) 1–0. jaddwarrior (1810) – Teslaboy, ChessWorld.net, 2013.

3.e3 a5

4.ba5 c5 5.Bb5+– Bd7 6.a4 Qa5 7.c4 dc4 8.Na3 Bb5 9.ab5 e5?? (better 9...Qd8+–) 10.Nc4 Qa1 11.Ba1 (11.Qa1?! Ra1 12.Ba1 f6+–) 1–0. fryckh – jaqufe, internet, 2017.

4.Bb5 c6 5.Be2 ab4 6.Nf3=.

3.e3 Nc6

4.a3 a5 5.c3 ab4 6.cb4 e6 7.Nf3 Nf6 8.Be2 Bd6 9.0–0 e5 (9...Na7+=) 10.d3 (10.Bb5!? Bd7 11.Bc6 Bc6 12.Be5+–) 10...e4 11.de4 de4 12.Nd4 Nd4 13.Bd4 0–0 14.Nc3 (< 14.Bb5 Bh2 15.Kh1 Ng4=+) 14...Re8? (better is 14...c6!?=) 15.Nb5 Be5?? (better is 15...Nd5+/–) 16.Be5+– Qd1 17.Rfd1 (17.Bd1?! Re5 18.Be2 c6+–) 17...Ba6 18.Bf6 Bb5 (18...gf6 19.Kf1 Re7 20.a4+–) 19.Bb5 gf6 20.Be8 Re8 21.a4 Rb8 22.b5 Kf8 23.a5 Rb5 (23...Ke7 24.a6 Ra8 25.g4+–) 24.Rd8 Ke7 25.Rd4 (25.a6!? Kd8 26.a7 Kd7+–) 25...f5 (25...Rb7 26.Re4 Kd6 27.Rd1 Kc5 28.Re7+–) 26.a6 Rb8 27.a7 Ra8 28.Rb4 (28...f4 29.Rb8 Ra7 30.Ra7+–) 1–0. maxeem – kdfoerster, Live Game Caissa's Web, 2004.

4.a3 a6 5.Nf3=.

4.a3 e5 5.Bb5 Qd7 6.Be5! Rb8 (6...Ne5 7.Bd7 Pinning (7.Bd7 Deflection)) 7.Ba4 Ba6? (7...f6 8.Nf3 a5+–) 8.Nf3 (better 8.Nc3 Bb7 9.Nb5+–) 8...Bd6 (8...Nf6 9.Nd4 Bb7+–) 9.Bg7 Be5 (9...Nge7 10.Bh8 Qg4+–) 10.Ne5 (10.Ne5 Ne5 11.Bd7 Nd7 12.Bh8+–) 1–0. GuestTLPF – GuestGMRM, freechess.org, 2019.

4.a3 e5 5.Bb5 Bd7 6.Bc6 Bc6 7.Be5+–.

4.a3 e5 5.Bb5 Nge7 6.Be5 Bd7 7.Bb2 (7.Bc3 a5 8.ba5 Na5 9.Bd7 Qd7+–) 7...Ng6 (7...a5 8.ba5 Rb8 9.Nc3+–) 8.Nf3 a6 (8...a5 9.ba5 Rb8 10.Bc6 Bc6 11.Bd4+–) 9.Be2 Be6 (9...a5 10.b5 Na7 11.a4+–) 10.0–0 f6 11.Nd4 (11.Nc3 Bd6+–) 11...Nd4 12.Bd4 Be7 13.Bf3 (13.Nc3 0–0+–) 13...0–0 14.d3 (14.c4 c6+–) 14...Ne5 15.Nd2 Nf3 (15...a5 16.b5+–) 16.Nf3 (16.Qf3 Qd7+–) 16...c6 (16...a5 17.c3+–) 17.c4! dc4 18.dc4 Bc4 19.Re1 Qc7 20.Qc2 Bf7 21.Bc5 Rfe8 22.Be7 Re7 23.Nd4 Rc8 24.Rec1 Bd5 25.Nf5 Re5 26.Nd4 Qd7 27.f4 Re3= 28.Re1 Re1 29.Re1 Bg2 30.Kg2?? Qd4+= 31.Qe2 Qd5 32.Kg1 Qd4 33.Kg2 Qd7 34.Qa6= Rd8 35.Qe2 h6 36.Qc4 Kh8= 37.h3 Qc7 38.Re6+= Qa7 39.Qc3 Qa6 40.Qe3 f5 41.Qc3 Rd3 42.Rh6 Kg8 43.Rc6 Qa3 44.Qa3 Ra3 45.Rc8 Kh7 46.b5 Rb3 47.Rb8 Kh6 48.b6 Kg6 49.b7 Kf7 50.h4 Ke7?? 51.Rg8 Rb2 52.Kf3 Rb3 53.Ke2 Rb7 54.Rg7 (54.Rg7 Ke8 55.Rb7+–) 1–0. tanto – reyr (1800), net–chess.com, 2002.

4.a3 e5 5.Nf3 Bd6 6.Bb5+– Bd7 7.Bc6 Bc6 8.Ne5 Be5 9.Be5 Qg5 10.Bg3 Rc8 11.0–0 Nf6 (11...Ne7 12.Nc3+–) 12.f4 (12.Qe2 Bd7+–) 12...Qg6 13.f5 Qg5 14.Bf4 (14.Nc3 Nh5+–) 14...Qf5 15.Bc7! Qg6 (15...Rc7 16.Rf5 Discovered attack) 16.Bd6 (16.Be5 Nd7 17.Bd4 Ba4+–) 16...d4 (better 16...Ba4+–) 17.g3?? (better 17.Qe2!? Qc2 18.Be5+–) 17...h5 (better 17...Qe4 18.Qe2 Ng4–+) 18.ed4= h4? (18...Kd7 19.d5 Bd5 20.c4=) 19.c4 (19.Qe2 Ne4 20.d5 Bd5 21.Qb5 Kd8+–) 19...hg3 (19...Ne4!? 20.Bf4 hg3=+) 20.Bg3 (20.hg3?? Rh1 21.Kf2 Rh2 22.Kg1 Rg2 23.Kh1 Qh6 24.Qh5 Qh5) 20...Kf8 (better 20...Qd3!? 21.Qe1 Kf8+–) 21.d5+– Bd7 22.Qf3 (22.Qb3 Ng4+–) 22...Ng4 (better 22...Rc4 23.Qf2 Rch4+–) 23.Qf7?? (better 23.Qf4 Kg8 24.c5 Nh2 25.Qf7 Qf7 26.Rf7 Kf7 27.Bh2+–) 23...Qf7= 24.Rf7 Kf7 25.Nc3?? (25.c5 Nf6 26.Nc3 Rh5=) 25...a6?? (better 25...Rc4 26.Rf1 Ke7–+) 26.Rf1 Kg8 27.c5 Bb5 28.Rf4 Bd7 (better 28...Nf6!?+=) 29.c6+– Bc6 (29...Ne5 30.cd7 Nd7+–) 30.dc6 Nf6 (30...Ne5 31.c7! Rc7 32.Rf5 Rc3 33.dc3+– (33.Re5 Ra3 34.Kf2 Kf7=+)) 31.Rc4 Re8 (31...Rh5+–) 32.c7 Rc8 33.Rd4 (33.b5 Nd7+–) 33...Kh7 (33...Kf7 34.Na4 Nh5 35.Rd7 Ke8 36.Nc5+–) 34.Rh4 (34.Na4 Ne8 35.Rc4 Nc7 36.Bc7 Rhe8+–) 34...Kg8 35.Rh8 Kh8 36.d4 Nh5 (36...Kg8 37.d5 Kf8 38.d6+–) 37.Be5 (37.d5 Nf6+–) 37...Kg8 (37...Nf6+–) 38.d5 Kf7 (38...Nf6 39.d6 Nd7 40.Nd5+–) 39.d6 (better 39.Ne4!? Rc7 40.Bc7 Ke8+–) 39...Ke6 40.d7! Kd7 41.Nd5 Ke6 42.Nb6 Ke5 (42...Rf8 43.Bg3 Ng3 44.hg3 g6+–) 43.Nc8 Ke6 44.Nb6 Kd6 45.c8Q Nf4 46.Qb8 Ke6 47.Qf4 (47.Qf4 Ke7 48.Qe5 Kf7 49.Qf5 Ke7 50.Qg6 Kf8 51.Nd7 Ke7 52.Nc5 Kf8 53.Qf5 Kg8 54.Ne6 g5 55.Qg6 Kh8 56.Qg7) 1–0. GuestBTYG – GuestTZMF, freechess.org, 2017.

4.a3 e5 5.Nf3 e4 6.Bb5 Bd7 7.Nd4 Nd4 8.Bd7 Qd7 9.Bd4+/–.

4.a3 e5 5.Nf3 Bg4 6.Be2 (better is 6.Bb5 Nge7 7.Be5+–) 6...Bf3= 7.Bf3 e4 8.Be2 Be7?? (better is 8...a6+=) 9.Bg7 Bf6 10.Bh8 Ba1 (10...Bh8 11.Bb5 Nge7+–) 11.Ba1 Qg5 12.0–0 0–0–0 13.Bb5 Nge7 14.Ba6 Kb8 15.Nc3 (15.f3 f5+–) 15...h5 (15...Rg8 16.g3+–) 16.Na4 (16.f3 f5+–) 16...h4 (16...Rg8 17.g3 h4 18.Nc5+–) 17.h3 (better is 17.Qe2!? d4 18.Nc5 d3 19.cd3 h3+–) 17...Rg8 18.Qg4 Qf6 (18...Qg4 19.hg4 Rg4+–) 19.Qe2 (better is 19.Bf6 Rg4 20.hg4 Ng6+–) 19...Qg6 (19...Nd4 20.Bd4 Qc6+–) 20.Qb5 1–0. maxum – carcacha2004, Live Game Caissa's Web, 2004.

4.Bb5+/– Bb7 5.Nf3 h6 (5...a6 6.Ba4+–) 6.0–0 e6? (better is 6...Nf6+–) 7.Ne5 Bb4 (7...Nge7 8.Qf3 Qc8+–) 8.Nc6 Qd6 (8...Qd7 9.Na7! c6 10.Qg4+–) 9.Nb4 c6 10.Bd3 a5 (10...Ne7 11.a3 0–0+–) 11.Bg7 0–0–0 (11...ab4 12.Bh8 Ba6 13.Ba6 Ra6 14.d4+–) 12.Nc6 Qc6 13.Bh8 f5 14.Qf3 Ne7 15.Bf6 Re8 16.c4! Ng6 17.cd5 Qd5 18.Rc1 Kd7 19.Qd5 Bd5 20.Bb5 Kd6 21.Be8 Ne5 22.Nc3 Ng4 23.Nb5 1–0. pumpkin (2620) – valerypavlovich (2155), net–chess.com, 2013.

4.Bb5 Qd7 5.a3 Bb7 6.Qf3 Nf6 7.Bf6 ef6 8.Nc3 a6 9.Ba4 0–0–0 10.Nge2 Qd6 11.Nd4 Nd4 12.ed4 Qe6 13.Qe3 Qf5 14.0–0 c6 15.Bb3 Bd6 16.Na4 Kc7 17.d3 Rhe8 18.Qd2 Bf4 19.Qc3 Re2 20.Nc5 Bd2 21.Qb2 Rde8 22.Nb7 Kb7 23.Qb1 Bc3 24.Ra2 Bd4 25.c4 Bf2 26.Kh1 Re1 27.Ra1 Rb1 28.Rab1 Re2 29.Bd1 Rd2 30.Bf3 Qd3 31.cd5 cd5 32.a4 Qc3 33.Rfc1 Rc2 34.Bd5 Ka7 35.Rd1 Rd2 36.Rdc1 Rc2 37.Rd1 Bd4 38.Rb3 Qc7 39.Rbd3 Rc1 40.Rd4 Rd1 41.Rd1 Qd6 42.Bf3 Qe7 43.b5 a5 44.Bc6 Kb6 45.g3 Kc5 46.Rc1 Kb4 47.b6 Qd6 48.b7 g5 49.Rb1 Kc5 50.b8Q Qc6 51.Kg1 Qa4 52.Rc1 Kd5 53.Qd8 Ke5 54.Rc5 Ke4 55.Qd5 Ke3 56.Rc3 Ke2 57.Qd3 1–0. Trkn – Reboot, itsyourturn.com, 2000.

4.Bb5 Bd7

5.a3 a5+/–.

5.a3 a6 6.Bd3 Nf6 7.Qe2 e6 8.Nf3 Bd6 9.0–0 h5 10.h3 Ne4 11.Ba6 Bc8 12.Bc8 Qc8 13.d3 Nf6 14.c4 dc4 15.dc4 e5 16.c5 Qa6 17.Qa6 Ra6 18.cd6 1–0. pawndynasty – anakin, playchess.de, 2002.

5.a3 a6 6.Be2 e5 7.Nf3 f5? (7...e4!? 8.Nd4 Nf6+/–) 8.0–0 (8.Ne5!? Ne5 9.Be5 Nf6+–) 8...Bd6 9.Nc3 (better is 9.c4!? Nf6 10.c5+–) 9...e4 10.Nd4 Nd4 11.ed4 Nf6 12.h3 0–0 13.Re1 c6 14.f3 (14.Na4 Ng4 15.hg4 Qh4–+) 14...ef3 (14...a5!?+=) 15.Bf3= Bg3 16.Re2 Re8 17.Re8 Qe8 18.Ne2 Bd6 19.Qf1 a5 20.c3 ab4 21.cb4 Ne4 22.d3 Nd2 23.Qf2 Nf3 24.Qf3 g6 25.Kf2 Qf8 26.g4?? fg4–+ 27.Qf8 Rf8 28.Ke1 gh3 29.Kd2 h2 30.Rh1 Bg4 31.Nc3 Bf3 (31...Bf3 32.Rh2 Bh2–+) 0–1. Neumann,Frank (1650) – Korn,Lothar (1700), RSS5E–28 remoteschach.de, 2008.

5.a3 a6 6.Be2 e6 7.Nf3 Nf6 8.0–0 Bd6 9.c4 dc4 10.Bc4 0–0 11.d4 (11.Qc2 e5+–) 11...Ne7 (11...a5 12.b5 Ne7 13.a4+–) 12.Nbd2 (12.Qe2 Bc6+–) 12...Bb5 (12...a5 13.e4 Bf4 14.Qe2+–) 13.Bb5 (13.Qc2 Rb8+–) 13...ab5+– 14.Rc1 (14.e4 Bf4 15.Qc2+–) 14...Ned5 (14...Qd7 15.e4 Bf4 16.Qe2+–) 15.h3 (15.e4!? Nf4 16.e5 Nd3 17.ed6 cd6+–) 15...Nh5 (15...Nb6 16.Qc2+–) 16.Ne5 Qg5 (16...Nhf6 17.Nc6 Qd7 18.Qe2+–) 17.f4 (17.Ndf3 Qh6+–) 17...Nhf4 (17...Qh6 18.Qf3+–) 18.ef4 (18.Rf4?! Nf4 19.ef4 Qf4=) 18...Nf4 19.Qf3 Be5 (19...Nh3 20.Qh3 Qd2 21.Rf2+–) 20.de5 (20.Ne4 Qg2 21.Qg2 Ng2 22.Kg2+–) 20...Nd5 (better 20...Nh3 21.Qh3 Qd2+–) 21.Ne4 Qe3 22.Qe3 (22.Rf2 Qf3 23.Rf3 Ra6+–) 22...Ne3 23.Rf3 (23.Rc7 Nf1 24.Kf1 Rac8+–) 23...Nc4 24.Rc4! bc4 25.Rc3 Rad8 (25...Rfd8 26.Rc4 Ra7 27.Kf2+–) 26.Rc4 Rd1 (26...Rd7 27.a4+–) 27.Kf2 f5 (27...Rd7+–) 28.Ke2 (28.ef6 Rf7+–) 28...Rd5?? (better 28...Rb1 29.Bc1 fe4 30.Rc7 Rb3=) 29.Nc3 (better 29.Ng5 Re8 30.Rc7+–) 29...Re5 30.Kf3 Rd8 31.Rc7 Rd3 32.Kf4 Re4?? (32...Re1 33.Rc4 h6=+) 33.Ne4+– fe4 34.Ke4 (34.Ke4 Rb3 35.Rg7 Kf8 36.Be5+–) 1–0. GuestVRDG – GuestNLXD, freechess.org, 2016.

5.a3 Rb8 6.Be2 Nh6 (6...e5 7.b5 Na5 8.Be5 Bb5 9.Nf3+/–) 7.Nf3 Ng4 (7...a5 8.b5 Na7 9.a4+/–) 8.0–0+– e5 (8...e6 9.Nc3+–) 9.h3 Nh6 (9...e4 10.hg4 ef3 11.Bf3 Qg5+–) 10.Ne5 Ne5 11.Be5 Nf5 12.d4 Bb5 (12...Bd6+–) 13.Bb5 Rb5 14.Qd3 Qd7 15.Bc7! Rb7 (15...Qc7 16.Qb5 Deflection (16.Qb5 Overloading)) 16.Bh2 Nh4 (16...Be7 17.Nd2+–) 17.Nd2 Be7 18.c4 0–0 19.cd5 Qd5 20.Qe4 Qe4 21.Ne4 Nf5 22.Rfc1 Rb6 23.Rc3 Bd6 24.Bd6 Nd6 25.Nd6 Rd6 26.Rac1 Rdd8 27.Rc7 a6 28.Ra7 Rc8 29.Rcc7 a5 30.Rc8 Rc8 31.Ra5 h6 32.g4 g5 33.b5 Kf8 34.b6 Ke8 35.b7 Rb8 36.Ra8 Rd8 37.Rd8 Kd8 38.b8Q Ke7 39.d5 Kf6 40.d6 Ke6 41.e4 f6 42.Qc7 Ke5 43.Qe7 Kf4 44.d7 f5 45.ef5 h5 46.Qe3 1–0. Fournier,Frederic – Carnus,Romain, FRA Ch (Team) N5 Senlis1–Senlis2, 2000.

5.Bc6 Bc6 6.Nf3 Rb8 7.Ne5 Qd6 8.Qf3 Nf6 9.Nc6 Qc6 10.a3 (10.Bf6 Qf6 11.Qf6 gf6+–) 10...a5 (better 10...Qc2!? 11.Bf6 Qc1 12.Qd1 Qd1 13.Kd1 gf6+=) 11.Bf6+– ef6 12.Nc3 Bd6 13.b5 Qc5 14.0–0 0–0 15.a4 d4 (15...Rfd8 16.Nd5 Be5 17.d4 Qd5 18.Qd5 Rd5 19.c4+–) 16.Ne4 Qc2 17.Nd6 cd6 18.ed4 (18.Qd5 Qd2 19.Rad1 Qb2 20.Qd4 Qb3+–) 18...Qd2 19.Qd5 (19.Rfd1 Qb4+=) 19...Rfd8 20.Rfc1 Rbc8 Threatening mate... how? 21.Rd1 Qc3 (21...Qb4 22.h3+=) 22.g3 (22.b6 Rc6 23.Rab1 Rb8+–) 22...Rc4 Attacks the isolani on d4 (22...Qb4 23.Kg2+=) 23.Rac1+– Qc1 24.Rc1 Rc1 25.Kg2 Ra1 (25...Kf8 26.b6 Rb1 27.Qb7+–) 26.Qb3 (26.Qc4 Rf8+–) 26...d5 (26...Rc1!?+–) 27.b6+– White gets decisive kings attack 27...Rb8 28.Qb5 Rd1 29.Qa5 (29.Qd5?! Rb1 30.Qa5 R1b6+–) 29...Rd4?? (29...Rb1 30.h4+=) 30.Qc5 (better 30.b7 g6 31.Qa7 Rb7 32.Qd4+–) 30...Ra4= 31.b7 Do you see the mate threat? 31...g6?? (31...Rb7 A deflection 32.Qc8 Theme: Double Attack) 32.Qc8!! Rc8 33.bc8Q Kg7 34.Qc6 d4 (34...Ra5+–) 35.Qa4 (35.Qa4 d3 36.Qd7+–) 1–0. aravind555 – gumdrop, lichess.org, 2018.

5.Nf3 a6 6.Bc6+/– Bc6 7.Ne5 Qd6 8.Nc6 (8.a3 Nf6+/–) 8...Qc6 9.0–0 Nf6 (9...e6 10.a3+/–) 10.Na3 (10.a3 a5+/–) 10...Qd6 11.c4 (11.c4 Qb4 12.Qc2+/–; 11.Bf6 Qb4 12.Be5 Qa3+/–) 1–0. Woelfelschneider,Peter – Grecu,Daniel, FICGS, 2006.

5.Nf3 Nb4!? 6.Bd7 Qd7+=.

5.Nf3 e6 6.0–0 (6.Ne5 Qd6 7.Qf3+–) 6...Bb4?? (better 6...Nge7+–) 7.Bg7 Nge7 8.Bh8 1–0. GuestLSYV – GuestMJKI, freechess.org, 2017.

3.e3 Bd7

4.a4 ba4 5.Nf3=.

4.Nc3 c6 5.e4 d4 6.Nb1 e5 7.g3? (better is 7.Nf3!? Bd6 8.c3=) 7...Bb4–/+ 8.a3 Bc5 9.Nf3 Bd6 10.h4 Nf6 11.h5 Bg4 (11...Ne4?! 12.Qe2 f5 13.d3–/+) 12.h6 g6 13.Bh3 Bh3 14.Rh3 Qb6 (14...Ne4 15.Qe2 f5 16.a4–+) 15.Ng5 Ng4?? (better is 15...0–0–+) 16.Qg4+– Qd8 17.Qf3?? (better is 17.a4+–) 17...Qg5–/+ 18.d3 0–0 19.a4 a5 20.Nd2 f5 21.Qe2 Na6 (21...Bb4!? 22.Bc1 fe4 23.Qe4 Bc3–+) 22.ab5–/+ Nb4 23.Rc1? (better is 23.Nc4 Bc5 24.Ne5 cb5 25.f4–/+) 23...cb5–+ 24.Ba3 (24.c4 dc3! 25.Rc3 Rac8–+) 24...Rac8 25.Bb4 Bb4 (25...ab4?! 26.ef5 Rf5 27.Rh2–/+) 26.Kf1 (26.ef5 Qf5 27.g4 Qf4–+) 26...Ba3 27.Nf3 Qc1 28.Ne1 Bb4 29.Kg2 Be1 30.Rh1 Qc2 31.Qe1 b4 32.Kh3 Qd3 33.ef5 Rf5 34.Kg4 Qf3 35.Kh4 Rh5 0–1. karlsdad – irish paddy, ChessWorld.net, 2012.

3.e3 e5

4.Be5+/– a6 5.c3+/–.

4.Be5+/– Nc6 5.Bb2 Nb4 6.Bb5 c6 7.Be2 Qg5 (7...Bf5 8.d3+=) 8.g3 (8.a3 Na6 (8...Qg2? 9.Bf3 Nc2 10.Qc2+–) 9.Nf3 Qg6+/–) 8...Bf5 9.d3 Nf6 10.Nf3 Qh6 11.Nd4 Bh3 12.a3 Bg2 13.Rg1 (13.ab4?! Bh1 14.Nc6 Nd7+=) 13...Nc2?? (better is 13...Qh2 14.Rg2 Qg2+–) 14.Qc2+– c5 15.Nb5 (better is 15.Rg2 Nd7 16.Nf3 Qe6+–) 15...Qh2 16.Nc7 (better is 16.Rg2!? Qg2 17.Bf1 Qh1 18.Nc7 Kd8 19.Na8 d4+–) 16...Kd7 17.Na8 (better is 17.Rg2 Qh1 18.Bf1 Kc7 19.Bf6 gf6 20.d4+–) 17...Qg1 18.Kd2 Qf2 19.Qa4 Ke6 20.Qe8?? Ne8–+ (20...Ne8 21.Nc3 Qg3–+) 0–1. Valpa – Dc, HCL–C2733 playchess.de, 2004.

4.Be5+/– Nc6 5.Bb5 Bd7 6.Bc6 Bc6 7.Nf3 Qe7 8.0–0 (8.Nc3 Nf6+–) 8...Nf6 (8...f6 9.Bg3+–) 9.Nc3 Rb8 10.b5! Bb5 (10...Bb7+–) 11.Rb1 Bf1 (11...Nd7 12.Nd5 Qc5 13.Nc7 Kd8+–) 12.Rb8 (12.Qf1?! Rb1 13.Qb1 Qb4+=; 12.Kf1?! Rb1 13.Qb1 Qb4 14.Qb4 Bb4 15.Bf6 gf6 16.Nd5 Be7 17.Nc7 Kd7+–) 12...Kd7 13.Qf1 Ng4 14.Qb5 c6 15.Rb7 Ke6 (15...Ke8 16.Qc6 Qd7 17.Qd7) 16.Qc6 Kf5 17.e4 de4 18.Qe4 Ke6 19.Nd4 1–0. GuestMLSN – GuestVTCK, freechess.org, 2020.

4.Be5+/– Nc6 5.Bb5 Bd7 6.Bc6 Bc6 7.Nf3 f6 8.Bc3 Bd6 (8...Qd7 9.0–0+–) 9.Nd4 Bb7 (9...Qd7 10.Qh5 g6 11.Qf3+–) 10.Qg4 (10.0–0 Qd7+–) 10...Qe7 (10...Qd7 11.Qd7 Kd7 12.Nf5+–) 11.Nf5 0–0–0 (11...Nh6 12.Qh5 Qf7 13.Ng7 Kf8 14.Qh6 Qg7 15.Qf6 Qf6 16.Bf6 Rg8+–) 12.Ne7 (12.Ne7 Kb8 13.Nf5+–) 1–0. GuestNVBF – GuestMDQG, freechess.org, 2020.

4.Be5+/– Nc6 5.Bb5 Bd7 6.Bc6 Bc6 7.Nf3 Nf6 8.Nd4 Bb7 9.Nb5+–.

4.Be5+/– Nc6 5.Bb5!? Nge7 6.Bc3+–.

4.Be5+/– Nc6 5.Bb5 Nge7 6.Nc3 Rb8 7.Nf3+–.

4.Be5+/– f5? 5.Be2 (better 5.Qh5 g6 6.Qf3+–) 5...d4?? (better 5...Nf6+–) 6.Bd4 (better 6.Bb5 c6 7.Qh5 Ke7 8.Bc4+–) 6...f4 (6...Nf6+–) 7.Bh5 Kd7 (7...Ke7 8.Bc5 Kf6 9.Qf3 (9.ef4?! Bc5 10.bc5 Bb7+–) 9...Bc5 10.bc5+–) 8.Qg4 Ke7 (8...Kc6 9.Qf3 Qd5+–) 9.Bc5 Qd6 10.Qf4 (better 10.Qc8 Nh6 11.Bf3 fe3 12.Bd6 Kd6 13.Ba8 Nd7+–) 10...Qc5 (10...Nf6 11.Bd6 cd6+–) 11.Qf7 Kd8 (11...Kd6 12.bc5 Kc5 13.Qc7 Nc6 14.d4 Kd5 15.Nc3 Kc4 16.Qc6 Kb4 17.Qb5 Kc3 18.Qb3) 12.Qe8 1–0. GuestLJTQ – GuestXWST, freechess.org, 2017.

4.Be5+/– f6 5.Bb2 Bb4 6.Bb5 c6 7.Be2 Bf5 8.Bg4 Ne7?? (better is 8...Be4 9.Nf3 Nh6+/–) 9.Bf5+– Nf5 10.Qg4 d4 (10...Ne3 11.fe3 Bf8 12.Nf3+–) 11.Qf5 de3 12.Qe4 Qe7 13.Qe7 Ke7 14.fe3 Nd7 15.Nf3 Nc5 16.0–0 Ne4 17.d3 Nd6 18.c3 Bc5 19.d4 Bb6 20.Nbd2 Rhe8 21.c4 Nf5 22.c5 Bc7 23.Nc4 Kd7 24.Rfe1 Nh6 25.h3 g5 26.e4 g4 27.hg4 Ng4 28.Bc3 h5 29.Rab1 h4 30.Rb7 Kc8 31.Rbb1 Rg8?? 32.e5 f5 33.Nh4 f4 34.Rf1 Kd7 35.Rf4 Raf8 36.Rbf1 Rf4 37.Rf4 Ke6 38.Nd2 Ne3 39.Rf6 Kd5 40.Rf7 Nc4 41.Rd7 Ke6 42.Rc7 Ne3 43.Rc6 Kd5 44.Rd6 1–0. Hal1958 – Dc, playchess.de, 2004.

3.e3 e6

4.Bb5+/– c6 5.Be2 Nf6 6.a3 a5 7.c3 Be7 8.Nf3 0–0 9.b5 c5 (9...cb5 10.Bb5 Nbd7 11.d3+=) 10.a4 c4 11.d3 Qc7 (11...cd3 12.Qd3 Nbd7 13.c4+–) 12.d4 (12.dc4!? dc4 13.Ba3+–) 12...Nbd7 13.Nbd2 e5 14.de5 Ne5 15.Nd4 Bb7 16.N2f3 Rad8 17.0–0 h6 (17...Ne4 18.Qc2+–) 18.Re1 Rfe8 19.Qd2 Bd6 20.h3 Ne4 21.Qc1 Nf3 22.Bf3 Bh2 23.Kf1 Nf2 (better 23...Be5!?+–) 24.Kf2+– Bg3 25.Kg1 Be1 26.Qe1 Bc8 27.Qf2 Rd6 28.Re1 Rg6 (28...Rf6 29.Qh4+–) 29.Kh1 (29.Bd5 Bh3 30.Rf1 Rf6+–) 29...Rg3? (29...Rf6 30.Qh4+–) 30.Ba3 (30.Bd5 Rg6+–) 30...Qe5 (30...Rg5 31.e4 de4 32.Re4 Re4 33.Be4+–) 31.b6 (31.Bd5 Rh3 32.gh3 Qd5 33.Kh2 Bb7+–) 31...Qg5? (31...Rg6 32.Bc5 Bd7+–) 32.Bd6 Rf3 33.Qf3 Qh4 (33...Re4 34.Qg3 Qg3 35.Bg3+–) 34.Re2 (better 34.Rf1 Qf6 35.Qf6 gf6+–) 34...g6 (34...Qd8 35.Rf2 Qd7 36.Nf5+–) 35.Nc6 (better 35.Rf2!? f6 36.Qd5 Kg7+–) 35...h5 (35...Qg5 36.Rf2 f5 37.Qd5 Be6 38.Qc5+–) 36.Ne5 Re5 37.Be5 Bg4 (37...Qd8 38.Bd4 Bb7 39.Qf4+–) 38.Qg3 (38.b7 Qd8 39.Qf6 Qf6 40.Bf6 Kh7 41.b8Q g5 42.hg4 Kg6 43.Rf2 hg4 44.Qg8 Kh6 45.Qg5 Kh7 46.Qg7) 38...Qg3 39.Bg3 Be2 (39...Bc8 40.e4 d4 41.cd4+–) 40.Kg1 1–0. alessandrocarvalhaes (1820) – Pulian (1895), lichess.org, 2019.

4.Bb5+/– c6 5.Be2 Nf6 6.a3 a6 7.Nf3 Bd6 8.0–0 0–0 9.c4 c5 (9...dc4 10.Bc4 a5 11.ba5+/–) 10.bc5 Bc5 11.d4 Be7 12.c5 Nc6 13.Nc3 Rb8 14.Rb1 Ne4 (14...Qc7 15.Qa4+/–) 15.Ne4+– de4 16.Nd2 f5 17.Qa4 Bd7 (17...Bb7 18.Bc4 Qc8 19.Bc3+–) 18.Qa6 (18.Ba6?! Nd4 19.Qd4 Bf6+–) 18...Bf6 19.Nc4 Ra8 20.Qb6 Na5 (20...Qe7 21.Nd6+–) 21.Qd8 Rfd8 22.Nb6 Rab8 23.Bc3 Nb7 (23...Nc6+–) 24.Nd7 Rd7 25.c6 Rc7 26.Rb6 (< 26.cb7 Rc3 27.a4 Rc2+–) 26...Be7 27.Bb2 (27.Rfb1 Bd6+–) 27...Bd6 28.Ba6 Kf7 29.Rc1 Na5 30.Rb8 Nc6 (30...Ra7 31.Rb6 Bc7 32.Rb7 Nb7 33.cb7+–) 31.Rb6 (31...Nd4 32.ed4+–) 1–0. Woschkat,Karl_Heinz – Busch,Georg, remoteschach.de, 2002.

4.Bb5+/– Bd7 5.Be2 Bb4 6.Bg7 Bf8 7.Bh8 1–0. GuestDWBQ – GuestLKSW, freechess.org, 2017.

3.e3 Bf5

4.Bb5 c6 5.Bd3 Be4? (better 5...Bd3 6.cd3 e6+=) 6.Nc3?? (better 6.Be4 de4 7.Qg4+–) 6...Bg2–+ 7.Nf3 Bh1 8.Ng5 (8.Ne5–+) 8...f6 (better 8...e5 9.Qh5 g6–+) 9.Qh5–/+ Kd7?? (better 9...g6 10.Bg6 hg6 11.Qg6 Kd7–/+) 10.Nf7 (10.Bf5 e6 11.Ne6 Qe7+=) 10...Qe8= 11.Qf5?? (better 11.Qh3 e6 12.Nh8=) 11...e6–+ 12.Nd5 (12.Qh5 Nh6 13.Ke2 Be4 14.Ne4 de4 15.Ne5 fe5 16.Qe8 Ke8 17.Be4 Bb4 18.Be5 Nf5–+) 12...cd5 (better 12...Qf7!? 13.Qh3 cd5 14.f3–+) 13.Bb5 Nc6 14.Bc6 Kc6 15.b5 (15.Qh5 Nh6 16.b5 Kd7–+) 15...Kd7 (better 15...Kb7 16.Qh5 g6 17.Qh3 Qf7 18.f3–+) 16.Qh5 g6 (better 16...Rc8 17.d3 Rc2 18.Qd1 Rb2 19.Nh8–+) 17.Ne5 fe5 (17...Kc8!? 18.Qe2 Bd6 19.Nc6–+) 18.Qe5 Bh6 (18...Nf6 19.Qf6 Rg8 20.Qh4–+) 19.Ba3 (19.Qh8 Qf7 20.d3–+) 19...Ne7 20.Rc1 (20.Qd6 Kc8 21.Qe7 Qe7 22.Be7 Kd7–+) 20...Rb8 (better 20...Nf5 21.Qc3 Rc8 22.Qa5–+) 21.c4 (21.Qd6 Kc8 22.Qe6 Qd7 23.Qe7 Qe7 24.Be7 Rb5–+) 21...dc4 (better 21...Rb6 22.Bc5 Qb8 23.Qb8 Rbb8 24.Ke2 dc4 25.Rh1 Rb5 26.Bd4–+) 22.Qd6 (22.Rc4 Nc6! 23.bc6 Kc8–+) 22...Kc8 23.Rc4 (23.Bb2 Nc6! 24.Bh8 Rb5 25.Rc4–+) 23...Kb7 (better 23...Nc6! 24.bc6 Rb1 25.Bc1 Bd5–+) 24.Rc7 Ka8 25.b6 (25.Ra7! Ka7 26.Qa6) 25...Rb6–+ 26.Qb6 ab6 27.Bd6 Nc8 (27...Bf3 28.d4 Qb5 29.Kd2 Qb2 30.Rc2 Qd4 31.Kc1 Qd1 32.Kb2 Bg7 33.Be5 Be5 34.Kb3 Qd3 35.Ka4 Qc2 36.Kb5 Qc5 37.Ka4 Bd1) 28.Rc3 Qa4 (better 28...Nd6 29.Ra3 Kb7 30.Rc3–+) 29.Ke2 Qa2 (29...Qb5 30.Kd1 Qb1 31.Ke2 Bg2 32.d3 Qb2 33.Ke1 Qc3 34.Ke2 Qc2 35.Ke1 Bf3 36.a4 Qe2) 30.Rd3 Qa6 31.Kf1 (31.Bc7 Be4 32.Bd6 Qd3 33.Ke1 Bf3 34.e4 Bd2) 31...Be4 (31...Qd3 32.Ke1 Bf3 33.e4 Bd2) 32.f3 Bd3 (32...Qd3 33.Kf2 Qd2 34.Kg3 Qe3 35.Bf4 Bf4 36.Kh4 Bf5 37.h3 Qe1) 33.Kg2 (33.Kg1 Qa1 34.Kf2 Qf1 35.Kg3 Qg1 36.Kh3 Bf5 37.Kh4 Bg5) 33...Bf1 34.Kg3 (34.Kf2 Qe2 35.Kg3 Qg2 36.Kh4 Bg5) 34…Qe2 (34...Qe2 35.d4 Qg2 36.Kh4 Bg5) 0–1. Agiant – THECAPSLOCKGUY, lichess.org, 2019.

4.Bb5 c6 5.Be2 a5 (5...Qd6 6.g4 Be4 7.f3+/–) 6.a3 (6.b5 cb5 7.Bb5 Bd7+/–) 6...ab4+= 7.ab4 Ra1 8.Ba1 Nd7 (8...Qd6 9.Nf3+=) 9.c4 (9.Nf3 e6+/–) 9...dc4+= 10.Bc4 Nb6 11.Bb3 (11.Qf3 Nc4 12.Qf5 e6+/–) 11...e6 12.Qf3?? (better is 12.Bd4+=) 12...Bb4?? (better is 12...Bb1 13.Qc6 Nd7–/+) 13.Qc6?? (better is 13.Bg7 Bb1 14.Qc6 (14.Bh8?? Qd2 15.Kf1 Qe1) 14...Nd7 15.Bh8 Bd2 16.Ke2+– (16.Kd2?! Be4 17.Qa4 Bg2+=)) 13...Nd7 (13...Kf8 14.e4 Bg6 15.Nf3+/–) 14.Bg7 Ne7 15.Qb5 Rg8 16.Bf6 (16.Qb4!? Bb1 17.Bc3+–) 16...Bb1 (better is 16...Qa5 17.Qa5 Ba5 18.Be7 Ke7=) 17.Be7?? (better is 17.Qb4 Nf6 18.Ba4 Kf8 19.Qb1+=) 17...Qe7–+ 18.Nf3 (better is 18.Ba4 Qd6 19.Nf3–+) 18...Bd3?? (better is 18...Be4 19.Ne5 Qd6 (19...Bg2?! 20.Nd7 Bh1 21.Qb8 Kd7 22.Ba4 Bc6 23.Qb7 Ke8 24.Qb8 Qd8 25.Bc6 Ke7 26.Qb4 Kf6 27.Qf4 Kg7 28.d4=+) 20.Qd7 Qd7 21.Nd7 Kd7–+) 19.Qd3+– Nc5 (19...Rg2 20.Qh7 Qf6 21.Qe4+/–) 20.Qb5 Kf8 (better is 20...Qd7 21.Qb8 Qd8 22.Ba4 Na4 23.Qb4 Nb6 24.Qb5 Ke7+–) 21.Qb4?? (better is 21.Bc2 Nd7 22.0–0+–) 21...Nd3–+ 22.Ke2 Qb4 23.Be6 (23.Bc2 Nb2 24.Ne1–+) 23...Nb2 (23...Qe4!? 24.g3 fe6 25.Ra1–+) 24.Nd4 fe6 25.Ne6 Ke7 26.Nd4 (26.Nf4 Qc4 27.d3 Nd3 28.Nd3 Qc2 29.Kf3 Qd3 30.h3 Rf8 31.Kg3 Qg6 32.Kh2 Rf2 33.Rg1–+) 26...Rg2 (26...Qc4 27.Ke1 Qc1 28.Ke2 Qh1 29.Nf5 Kf6 30.e4 Qd1 31.Ke3 Qe1 32.Kd4 Qd2 33.Kc5 Qc3 34.Kb6 Rb8 35.Ka7 Qc7 36.Ka6 Qb6) 27.Rb1 (better is 27.Nc6 Kd6 28.Nb4+–) 27...Qc4–+ 28.Kf3 Rg6 (better is 28...Qd5 29.e4 Qd4 30.Kg2 Qe4 31.f3 Qb1 32.h3–+) 29.Nf5 (29.Rb2 Rf6 30.Ke4 Re6 31.Kf4 Qc7 32.Kf3 Rf6 33.Kg2 Rg6 34.Kf3 Qh2 35.e4–+) 29...Kf6 30.Nd4 Qd5 31.Ke2 Nc4 (better is 31...Qh5 32.Kf1 Qg4 33.Re1–+) 32.f4 (32.Rb5 Qe4 33.d3 Qg4 34.Ke1–+) 32...Rg2 33.Kd3 Nd6 (better is 33...Nd2 34.Rb6 Kf7–+) 34.Rb6 h5 (34...Qc4) 35.Ra6 (35.Rc6 Rh2 36.Kc3–+) 35...Qc4 0–1. Scirocco – painter1, Live Game Caissa's Web, 2004.

3.e4 d4

4.Nf3 a5!?+/–.

4.Nf3 Nc6 5.Bb5+– Bb7 6.Nd4 Qd7 7.Nc6 Bc6 8.Bc6 Qc6 9.Qg4 (9.Nc3 Nf6+–) 9...f6? (9...Qc2!? 10.Bc3 Nf6 11.Bf6 ef6+/–) 10.0–0 (10.Nc3 e5+–) 10...e6 (10...Qc2 11.Ba3+–) 11.Nc3 Bb4?? (11...Rd8 12.d3 Nh6 13.Qh5 Nf7+–) 12.Qg7 0–0–0 13.Qh8 Bc3 14.Bc3 e5 (14...Qe4 15.Rfe1 Qc2 16.Re6+–) 15.Qh7 Qa4 16.Rab1 Qc2 (16...a6+–) 17.Rb3 Qa2 18.Rfb1 Qb3 19.Rb3 a6 (Black claimed a win on time....... ) (19...a6 20.Ba5 Ne7 21.Qe7 Rd7 22.Qe8 Rd8 23.Qc6 Rd2 24.Qc7). laurichmax – diggerdogwoofwoof, ChessWorld.net, 2012.

4.Nf3 Nc6 5.Bb5+– Bb7 6.Nd4 Nf6 7.Nc6 Qd6 (7...Qd7 8.Nd4 c6 9.Bd3+–) 8.Nd4 (better 8.e5!? Qd5 9.ef6 Qb5 10.fg7 Bg7 11.Bg7 Rg8+–) 8...Nd7 (8...Kd8 9.a3 Be4 10.0–0+–) 9.f3 (9.Qg4 c6 10.Be2 Qb4+–) 9...Qb4 (9...c6 10.Be2 Qb4 11.Nb3+–) 10.Bd7 (10.Bc3 Qd6+–) 10...Kd7 11.Nb3 Rd8 (11...Kd8 12.0–0+–) 12.Nc3 (12.Bd4 a6+–) 12...e6 (12...e5 13.Qe2+–) 13.a4 (better 13.Rb1 Ke8+–) 13...Kc8 (13...Qe7 14.0–0+–) 14.0–0 (14.Nb5!? Be4 15.Bc3 Qe7 16.fe4 Qh4 17.Kf1 a6+–) 14...Qb6 (14...Ba6 15.d3+–) 15.d4 (15.Kh1 f6+–) 15...e5 16.a5 Qh6 (16...Qg6 17.d5+–) 17.Na4 (17.d5 Qe3 18.Rf2 a6+–) 17...Qe3 (17...ed4 18.Nac5 Bd6 19.f4 Bc5 20.Nc5+–) 18.Kh1 (better 18.Rf2 Qh6 19.d5+–) 18...Bc6 (18...Ba6 19.Qc1 Qc1 20.Rfc1+– (20.Bc1?! Bf1 21.Bg5 f6 22.Rf1 fg5+=; 20.Nc1?! Bf1 21.Nb3 Bb5=; worse 20.Rac1 Bf1 21.Rf1 ed4+–)) 19.d5 (better 19.Bc1 Qd4 20.Nd4 Rd4+–) 19...Ba4 (19...Bb5 20.Be5 Bf1 21.Qf1 Rd5 22.Qa6 Kd7 23.Bc7+–) 20.Ra4 Rd6 (20...Qf4+–) 21.Bc1 Qc3 22.Bd2 (better 22.Qe2 Rc6 23.dc6 Qc6+–) 22...Qb2 23.a6 (23.c4 Be7 24.Rf2 Bh4+–) 23...c5 (23...Rd7 24.Bc1 Qc3 25.Qe2+–) 24.Nc5 Qb6 (24...Qb5 25.Ra5 Qb2 26.Nd3+–) 25.Nb7 Rh6 (25...Rg6 26.Qe2 Kd7 27.Be3+–) 26.Bh6 Qh6 (26...gh6 27.Rc4 Kd7 28.f4+–) 27.Rc4 (27.d6 Kd7 28.Qd5 Bd6 29.Qf7 Be7 30.Rc4 Qc1 31.Rc1 Rd8 32.Rd1) 27...Kb8 28.Qb1 (28.d6 Qh4 29.Qb1 Qh2 30.Kh2 f6 31.Nd8 Ka8 32.Rc8) 28...Qb6 29.Qb6 (29.Rc6 f6 30.Nd6 Be7 31.Rb6 Ka8 32.Rc6 Rb8 33.Rc8 Rc8 34.Qb7) 29...ab6 30.Ra1 Be7 31.d6 Bg5 32.d7 (32.a7 Ka8 33.d7 Kb7 34.Rc8 Rc8 35.dc8R Kc8 36.a8Q Kc7 37.Ra7 Kd6 38.Qd5) 32...Ka7 (32...Be7 33.a7 Kb7 34.Rc8 Rc8 35.dc8R Kc8 36.a8Q Kd7 37.Ra7 Ke6 38.Qc8 Kd6 39.Qc7 Ke6 40.Qe7) 33.Rc8 (33.Rc8 b5 34.Rh8+–; 33.Nd6 b5 34.Nb5 Kb6 35.Rb1 Be7 36.Nc7 Bb4 37.Rbb4 Ka7 38.Rb7) 1–0. jaddwarrior (1890) – pikelet (1615), ChessWorld.net, 2014.

4.Nf3 Nc6 5.Bb5+– Bd7+–.

3.e4 de4!?

4.Bb5 c6 5.Bc4 e5 (5...Nf6 6.a3=) 6.Be5 Bd6?? (better is 6...Nd7 7.Bc3 Nb6+=) 7.Bg7+– Qg5 8.g3?? (better is 8.Bh8 Qg2 9.Qh5+–) 8...Qg7–+ 9.Nc3 Bg4 10.Be2 Nf6 11.Bg4 Bb4?? 12.Be2 Nbd7 13.Nh3 Bc5 14.0–0 Ne5 15.d4 Neg4?? 16.dc5+– 0–0 17.Bg4 Ng4 18.Ne4 Rad8 19.Qf3 f5 20.Qb3 Rf7 21.Neg5 Ne5 22.Nf7 Nf3 23.Qf3 Qf7 24.Qc6 Rd2 25.Qa8 Kg7 26.Rfd1 Rc2 27.Qc6 f4 28.Rd7 Rc5 29.Rf7 Kf7 30.Qc5 fg3 31.fg3 (31.fg3 a6 32.Rf1 Ke6 33.Ng5 Kd7 34.Rf7 Kd8 35.Qf8; 31.Qf5 Kg7 32.Re1 gf2 33.Kf2 Kg8 34.Rg1 Kh8 35.Qf6) 1–0. Valpa – Dc, playchess.de, 2004.

4.Bb5 Bd7 5.Bc4 (5.Qe2 f5+/–) 5...Nc6 (better is 5...Nf6=) 6.Bf7 (better is 6.b5!? Na5 7.Be2=) 6...Kf7–/+ 7.b5 Nb4 (better is 7...Na5 8.Qh5 g6 9.Qd5 e6 10.Qe4 Nf6–/+) 8.a3+= Nd5? (better is 8...Nc2 9.Qc2 Nf6+=) 9.Qh5+– g6 (9...Ke6 10.Qe5 Kf7 11.Qd5 e6 12.Qe4 Bb5 13.Nf3+–) 10.Qd5 Be6?? (10...e6 11.Qe4 Nf6+–) 11.Qd8 Rd8 12.Bh8 1–0. Wall,Bill – Broker, internet, 2005.

3.Nf3 Nc6

4.a3 a6 5.e3=.

4.a3 e6 5.e3+= Nf6 (Better is 5...a6!?+=) 6.Bb5+/– Bd7 7.Ne5?? (Better is 7.Bd3+/–) 7...a6?? (Better is 7...Ne5 8.Ba6 Ng6–+) 8.Bc6 Bc6 9.Nc6 Qd6 10.Bf6 gf6 11.Nd4 e5 12.Ne2 e4 13.d3 Bg7 14.de4 f5 15.ed5 Ba1 16.c3 Bc3?? 17.Nbc3 Rg8 18.Nf4 Rc8 19.Qd4 c6 20.0–0 c5 21.bc5 Rc5 22.Rb1 Ke7 23.Rb7 Ke8 24.h3 Kf8 25.Nh5 Rc7 26.Rb8 Ke7 27.Rg8 1–0. var – luthier, Live Game Caissa's Web, 2004.

4.d4 Nb4 5.a4 ba4 6.c4 =+.

4.d4 Bg4 5.h3 Bf3 6.gf3 (6.ef3 A) < 6...Nb4 7.c3+– (7.Bb5?! c6 8.Ba4 Qd7+=); B) 6...a6+=) 6...Nf6 (6...e5 7.e3 a6 8.a3 ed4 9.Bd4 Nd4 10.Qd4=) 7.Rg1 (7.a4 a6=) 7...e6 (7...Nb4 8.e4 a6 9.a4=) 8.Bg2 Bd6 9.Nc3 0–0 10.Qd3 a6 11.0–0–0? e5 12.e4? de4 13.fe4 ed4 14.Nd5 Nd5 15.ed5+= Nb4 16.Qf3?? Na2–+ 17.Kb1 Nb4?? 18.c3? dc3–+ 19.Bc3 a5 20.Kc1? Na2 21.Kd2 Nc3 22.Qc3 b4 23.Qd3 Bf4 24.Ke2 Re8 25.Kf1 a4 26.Be4 g6 27.h4 Bh2 28.Rg6 fg6 29.h5 Re4 0–1. YourKingisHere – kilmer49, Live Game Caissa's Web, 2004.

2.Bb2 d6

3.a3 a6 4.e3 e6 5.d4 f5 (5...d5 6.Bd3=) 6.f3 (6.c4 c6+=) 6...g5 (6...d5 7.Ne2=) 7.h3 (7.c4 bc4 8.Bc4 Nf6+=) 7...h5 8.f4 (8.c4 c6+=) 8...Bg7 9.Nc3 (9.Nf3 g4 10.Ng5 Bf6 11.hg4 Bg5 12.fg5 fg4=) 9...Qf6 (9...gf4!? 10.Qf3 Qh4 11.Kd1 c6 12.ef4 Bd4=+) 10.Nge2 Rh7 (10...Ne7 11.a4 Nbc6 12.ab5 Nb4 13.Ra4=) 11.Qd3 (11.a4 ba4 12.Na4 Bb7+=) 11...Bh6 (11...Bb7 12.d5=) 12.0–0–0 White prepares the advance d5 12...g4 (12...d5!?+=) 13.d5+– (13.d5 e5 14.g3+–) 1–0. Delboy Smith (1790) – Paul593 (1745), ChessWorld.net, 2012.

3.a3 e5 4.e4 Be7 5.Bb5+– Bd7 6.Bd7 Nd7 7.Nc3 Ngf6 8.Qf3 Rb8 9.0–0–0 (better 9.Nge2!?+–) 9...0–0 10.g4 Nb6 (10...a5 11.b5=) 11.d3 Qd7 12.h3 Ne8 (12...a5!?=) 13.Qf5 Qf5 14.gf5 Bg5 15.Kb1 g6 (15...Nf6 16.Nf3 Bf4 17.Ne2+–) 16.Nf3 Bf4 17.h4 Nf6 18.Rdg1 Nh5 19.Rg4 (19.Ne2 Na4 20.d4 a5 21.de5 ab4=) 19...Nd7 (19...c6 20.Rhg1+–) 20.Nd5 Rfe8 (better 20...Bh6!?+–) 21.Nc7+– Rec8 22.Nd5 Nb6? (22...Kf8+–) 23.Ne7 Kf8 24.Nc8 Rc8 25.Rhg1 Na4 26.Ba1 Nc3 27.Kb2 (27.Bc3 Rc3 28.fg6 hg6+–) 27...Na4 (27...Bh6 28.fg6 fg6 29.Re1+–) 28.Kb3 Nb6 29.c4 Nd7 30.a4 (30.R4g2 Nhf6+–) 30...Ndf6 31.R4g2 Ke7 32.b5 (32.fg6 hg6 33.d4 Ne4 34.de5 Be5 35.Be5 de5 36.Ne5 Ke6+–) 32...Rb8 (32...Bh6 33.d4 Nf4 34.Rh2+–) 33.Kb4 (33.fg6 hg6 34.c5 Nd7 35.cd6 Kd6+–) 33...a6 (33...gf5 34.ef5 Rc8 35.Kb3+–) 34.Ka5 (34.fg6!? fg6 35.a5 Bh6+–) 34...ab5 35.ab5 (35.cb5?! gf5 36.ef5 Bh6+–) 35...Nd7 36.Kb4 Nc5 (36...gf5 37.ef5 Ra8 38.d4+–) 37.Rd1 (37.fg6 hg6 38.d4 ed4 39.Bd4 Kd7+–) 37...Kf6 (37...Ra8 38.Bb2+–) 38.d4 (better 38.Ng5 gf5 39.Nh7 Ke7 40.ef5+–) 38...gf5 (38...Ne4 39.fg6 hg6 40.de5 de5+–) 39.dc5 dc5 40.Kc5 Ng7 (40...Rc8 41.Kb4+–) 41.ef5 (better 41.Ne5 Ne6 42.Kd5 Rd8 43.Nd7 Ke7+–) 41...Nh5 (41...Nf5 42.Rg4 Rc8 43.Kb4+–) 42.b6 (42.Ne5 Kf5 43.Nc6 Ra8+–) 42...Kf5 (42...Rc8 43.Kb5 h6 44.Rd5 Kf5 45.Be5+–) 43.Kb5 (43.Ne5!? Rf8+–) 43...f6 44.c5 Ke6 (44...Ke4 45.Ne1 Rc8 46.c6+–) 45.c6 e4 46.Nd4 Kf7 47.Re1 (better 47.Ne2 Re8+–) 47...Be5 (47...Bc7 48.b7 Nf4 49.Rgg1+–) 48.Re4 Ng7 (48...Nf4 49.Rg1 Bc7 50.b7+–) 49.b7 (better 49.Re5 fe5 50.c7 Re8+–) 49...Bd4 50.Bd4 Ne6 51.Ba7 (51.Re6 Ke6 52.Kc5 Rd8 53.c7 Rd5 54.Kc4 Rd4 55.Kd4 f5 56.c8Q Ke7 57.Rg7 Kf6 58.Qf8 Ke6 59.Qe7) 51...Nc7 52.Kc5 Ne6 53.Re6! Ke6 (53...Rd8 54.c7 Rd7 55.c8Q Ke6 56.Qc6 Ke5 57.b8Q Kf5 58.Qd7 Ke4 59.Qd5) 54.Bb8 (54.Bb8 h6 55.c7 f5 56.c8Q Kf6 57.Qf8 Ke6 58.Qe8 Kf6 59.Be5) 1–0. Delboy Smith (1825) – peterjohn5, ChessWorld.net, 2009.

3.a3 f6 4.e3 e5 (4...c6!?+=) 5.Bb5+/– Bd7 6.Bd7 Qd7 7.Nf3 Be7 8.c4 g5 (8...a5 9.ba5 f5 10.d4+/–) 9.0–0 g4 10.Ne1 h5 (10...a5+–) 11.g3 (11.d4!? h4+–) 11...Nc6 (11...Qe6!?+/–) 12.Ng2 0–0–0 (12...d5 13.cd5 Qd5 14.Qc2+–) 13.Qa4 Kb8?? (13...Kb7 14.b5 Nb8 15.d4+–) 14.Qb5 Ka8 15.a4?? Rb8 16.Qa6?? Rb6 17.Qb6 cb6 18.a5 ba5 19.ba5 Nb4 20.Nc3 Nc2 21.Rab1?? Nb4 22.Ba3?? Nd3 23.Nb5 f5 24.Rfd1 e4 25.Nf4 Bg5 26.Nd5 Ne7?? 27.Nbc7 Qc7 28.Nc7 1–0. Fournier,Frederic – KOSOVA_alb, Partie evaluee, 1m + 0s, 2007.

3.a3 Nf6 4.e3 c6 5.c4 bc4 6.Bc4=.

3.Na3 a5 4.ba5 Ra5 5.c4=.

3.Na3 a6 4.c4 Bd7 (4...bc4 5.Nc4 Nc6 6.Rc1=) 5.Nf3 (5.e4 bc4 6.Bc4 e6=) 5...e5 (5...Nf6 6.e3=) 6.g3 (6.e4 Nf6=) 6...g6 (better is 6...a5!?=+) 7.Bg2 Bc6 (7...Nc6 8.cb5 ab5 9.Nb5 Nb4 10.Nc3=) 8.0–0 Bg7 9.d4 e4 10.Ng5?? (better is 10.Nd2) 10...Bf6?? (10...Qg5 11.f3–+) 11.d5?? (11.Ne4 Bg7+–) 11...Bd7?? (better is 11...Bb2 12.Ne4 Bb7–+ (12...Ba3?! 13.Qd4 f6 14.dc6–/+; 12...Ba1?! 13.Qa1 f6 14.dc6)) 12.Bf6 Nf6+/– 13.Qd4 0–0 14.cb5 ab5 15.Ne4?? Ne4–/+ 16.Qe4 Ra3–+ 17.e3 Bf5 18.Qd4 Nd7 19.e4= Bg4 20.f3 Bh5 21.g4 Bg4 22.fg4 Nf6?? 23.g5 Nd7 24.h4 Ne5 25.Bh3?? Rh3–+ 26.a4 ba4 27.Ra4 (27...Qd7 28.Qd2 Rg3 29.Qg2 Rg2 30.Kg2 Qa4 31.Kg1 Qb4 32.Kh2–+; 27.Qd2–+). Gregor123 – chiha, mySchach.de, 2004.

3.e3 a5 4.ba5 Qd7 5.c4 bc4 6.Bc4.

3.e3 Bb7 4.Nf3 Nd7 (4...c6!?) 5.Bb5+/– Ngf6 6.0–0 a6 7.Bc4 d5 8.Bb3 e6 9.a3 Be7 10.c4 dc4 11.Bc4 Nb6 12.Bb3 0–0 13.Nc3 Qd6 14.d4 c6 (14...a5 15.b5) 15.Qd3 (15.e4 Nfd7+–) 15...g6? (better is 15...a5!? 16.ba5 Ba6) 16.e4+– Nh5 17.Ne5 f6 18.Nc4 Nd7?? 19.Nd6 Bd6 20.Be6 Kg7 21.Bd7 Rf7 22.e5 fe5 23.de5 Be5 24.Rae1 Bf6 25.g3 Rd8 26.Rd1 Bg5 27.Ne4 Nf6 28.Nf6 Bf6 29.Bf6 Rf6 30.Qc4 Rf7 31.Bc6 Rc8 32.Qd4 Kg8 33.Bb7 Rb7 34.Qd5 Rf7 35.f4 (35...Re8 36.Qc6+–) 1–0. kiloracer (2150) – sammyo (1900), net–chess.com, 2005.

3.e3 c5?? 4.Bb5?? (better is 4.Qf3 d5 5.Bb5 Nd7 6.Qd5+–) 4...Bd7 5.Qe2 (5.Bc4 Bc6 6.Qh5 Nh6 7.bc5 Bg2+/–) 5...cb4 6.Qc4 (6.a3 Nc6+=) 6...e6 7.Qb4 Bb5 8.Qb5+/– Ke7 9.Nf3 e5?? 10.Ne5!+– de5 11.Qe5 Kd7 12.Qd5 (12.Qd5 Ke8 13.Qa8+–) 1–0. Wall,Bill – Yanagiba, internet, 2001.

3.e3 Nd7 4.Nf3 Ngf6 5.Bb5 (5.Bf6 Nf6 6.Bb5 Bd7 7.Bd7 Qd7+–) 5...e6 (5...Rb8 6.Qe2+–) 6.Nd4 (6.0–0 Bb7+–) 6...Bb7 (6...c5 7.bc5 dc5 8.Qf3+–) 7.Nc6 Bc6 (7...Qc8 8.0–0+–) 8.Bc6+– Rb8 9.b5 Be7 (9...a6 10.ba6 Rb6 11.Bf6 gf6 12.Qf3+–) 10.Bd4+– 0–0 (10...e5!? 11.Bb2 0–0+–) 11.Ba7+– Rb6? (better 11...Ra8 12.Bd4 e5+–) 12.Bb6 Nb6 (12...cb6 13.d4+–) 13.a4 d5 14.a5 (14.0–0 Nc8+–) 14...Nc8 15.0–0 (15.Qe2 Na7 16.Bb7 Ne4+–) 15...Na7 16.a6 (16.c4 Nc6 17.bc6 dc4+–) 16...Nc6 17.bc6 Qa8 18.a7 (18.c4!? Qc6 19.cd5 Nd5+–) 18...Qc6 19.Nc3 Ra8 (19...Qa8 20.Qf3+–) 20.Qb1 Nd7 (20...Bc5 21.Qb8 Ne8 22.Rfb1 Ra7 23.Ra7 Ba7 24.Qa7+–) 21.Qb5 Qb6 (21...Qb5 22.Nb5 Bc5+–) 22.Qd7 Bd6 (22...Qd6 23.Qd6 Bd6 24.Ra6+–) 23.Rfb1 (23.Rfb1 Ra7 24.Qe8 Bf8 25.Rb6 Ra1 26.Rb1 Rb1 27.Nb1+–) 1–0. Adlai – Ninon, corr, 2018.

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

3.e3 f6 4.Bb5+– c6 5.Be2 Na6 (5...e5 6.Nf3+–) 6.a3 Rb8 7.Nf3 Nh6 8.0–0 e5 9.Nc3 (9.d4 e4 10.Nfd2 f5+–) 9...c5 (9...Nc7!?+–) 10.Bb5+– Ke7 11.d4 (11.Nd5 Kf7 12.Bc4 Be6+–) 11...ed4 (better 11...Nc7 12.Bd3 Be6+–) 12.ed4 cd4?? (12...Nc7+–) 13.Nd4 (better 13.Re1 Kf7 14.Bc4 Be6 15.Be6 Ke8 16.Nd4+–) 13...Qb6 (13...Kf7 14.Bc4 d5 15.Nd5 Bc5+–) 14.Nd5 (14.Qe2 Kf7 15.Qe8 Kg8 16.Bc4 d5 17.Nd5 g6 18.Nf6 Kg7 19.Nh5 gh5 20.Nf5) 14...Kf7 (14...Kd8 15.Nb6 Rb6 16.Nc6 Rc6 17.Bc6+–) 15.Nb6 ab6 16.Qh5 Ke7 17.Qe8 1–0. GuestXCFJ – GuestRHLC, freechess.org, 2017.

3.e3 g6 4.Bh8 a6 5.Bb2 (5.a4 ba4 6.Qf3 c6+–) 5...Nc6 6.a3 e5 7.c4 Rb8 (7...bc4 8.Bc4 d5 9.Bb3+–) 8.Nf3 Bf5 (8...Bg7 9.Qc2 Nge7 10.cb5 ab5 11.Nc3+–) 9.Be2 (9.cb5 ab5 10.Nc3 e4 11.Bb5 Rb5 12.Nb5 ef3 13.Qf3 Nge7+–) 9...Bg7 (9...e4 10.Ng1+–) 10.0–0 Nge7 11.cb5 (11.d4 e4 12.Nfd2 bc4 13.Bc4 Rb6+–) 11...ab5 12.Nc3 e4 13.Ng5 (better is 13.Ne1!? Qd7+–) 13...h6 14.Nh3 Bh3 15.gh3 (15.Ne4?! Bb2 16.gh3 Ba1 17.Qa1 Ng8) 15...Bc3 16.Bc3 Qd7 17.Bf6 d5 18.Kh1 Ng8 19.Bg4 Qd6 20.Bb2 Nf6 21.Bf6 Qf6 22.Qb3 d4 23.Qd5 h5 24.Qe4 Ne5 25.ed4 hg4 26.Qe5 Qe5 27.de5 Rd8 28.hg4 Rd2 29.f4 (29...Ke7 30.Rfc1+–) 1–0. kiloracer (1930) – dmarsh (1855), net–chess.com, 2005.

3.e4 Bb7 4.Nc3 c6 5.Be2 Nd7 6.Nf3 e5 7.0–0 h6 8.d4 ed4 9.Nd4 Be7 10.Bh5 Ngf6 11.Bf3 0–0 12.Qe2 a5 13.ba5 Ra5 14.Nf5 Re8 15.Qd2 Qc7 16.Qf4 Ne5 17.a4 b4 18.Nd1 Nf3 19.Qf3 c5 20.Qg3 Nh5 21.Qg4 g6 22.Nh6 Kf8 23.Ne3 Qc8 24.Nef5 Qe6 25.Bg7 Ng7 26.Ng7 Qg4 27.Ng4 Kg7 28.f3 Bc6 29.Ne3 Ra4 30.Ra4 Ba4 31.h3 Bf6 32.Kf2 Bd4 33.Rc1 Be3 34.Ke3 d5 35.c4 d4 36.Kd3 f5 37.Re1 fe4 38.Re4 Re4 39.fe4 Kf6 40.Kd2 Kg5 41.g3 Bd7 42.e5 Bh3 White resigned 0–1. Crusader Rabbit (1650) – Papa Joe (1730), ChessWorld.net, 2020.

3.e4 c6 4.a4 ba4 5.Ra4.

3.e4 Bd7 4.Be2 (4.a4 ba4 5.Nc3 Nf6+/–) 4...Nf6 (4...a5=) 5.Bf3 (5.a4!? ba4 6.Nc3=) 5...e5 (5...Nc6 6.Ne2+=) 6.d4 c6 (6...Nc6 7.Ne2+=) 7.de5 (7.Nd2!?+=) 7...de5= 8.Be5 Na6 (8...Bb4!? 9.c3 Bc5=) 9.a3+= Qe7 10.Qd4 c5 11.bc5 Qc5 (11...Nc5 12.Nc3 Ne6+/–) 12.Qc5 (better is 12.Nc3!?+/–) 12...Bc5+= 13.Bf6 gf6 14.e5 (better is 14.Nc3=) 14...f5?? (better is 14...0–0–0–/+) 15.Ba8+– Bd4 16.c3 Be5 17.Nf3 Bf6 18.0–0 0–0 19.Bd5 Nc7 20.Bb3 a6 (20...Ne6 21.Rd1 Bc6 22.Rd6 Bf3 23.gf3+–) 21.Rd1 Bc6 (21...Bc8 22.Nd4+–) 22.Nd4 (22.Rd6 Bf3 23.Rf6 Bd5 24.Bd5 Nd5 25.Rf5 Ne7 26.Rg5 Ng6+–) 22...Bd5 (22...Bd7 23.Bc2+–) 23.Bd5 Nd5 24.Nb5! Rd8 (24...ab5 25.Rd5 Double attack (25.Rd5 Discovered attack; 25.Rd5 Decoy)) 25.Nd4 (25.Ra2 Re8 26.Rad2 Nb6+–) 25...Ne7 (25...Nb6 26.Ra2+–) 26.Ra2 Rd6 (26...Nc6 27.Rad2 Nd4 28.cd4+–) 27.Rad2 Ng6 (27...Rd5 28.Nc6! Rc5 29.Nb8+–) 28.Nf5 Re6 29.Nh6 (better is 29.Rd6!? Be5 30.Re6 fe6 31.Rd8 Kf7 32.Nh6 Kf6 33.Ng4 Ke7+–) 29...Kg7 30.Ng4 Bg5 31.Rd7 h5 32.R7d5 f5 (32...f6 33.Ne3! Be3 34.fe3 Re3 35.Rh5+–) 33.Rd7 (better is 33.Rf5!? hg4 34.Rg5 Re4+–) 33...Ne7 34.Ne3! Be3 (34...Kf6 35.R7d6 Kf7 36.Re6 Ke6 37.Nd2+–) 35.fe3 Re3 36.Kf2 Re5 37.Re1 Re1 38.Ke1 Kf6 39.Rd6 Ke5 40.Ra6 Ke4 (40...Nd5+–) 41.Re6 (41.Re6 Kd5 42.Re7+–) 1–0. rcm06 (1900) – hotrodrebel, gameknot.com, 2012.

3.e4 f6 4.Nc3 Bd7 5.Nf3 Nc6 6.Bb5 e5 7.a3 Nd4 8.Bd7 Qd7 9.Nd4 ed4 10.Ne2 Nh6 11.Nd4 Qg4 12.Qg4 Ng4 13.h3 Ne5 14.Ne6 Kd7 15.Nf8 Rhf8 16.Be5 fe5 17.c4 c6 18.f3 a5 19.Ke2 ab4 20.ab4 Rab8 21.Rhb1 Rb7 22.b5 cb5 23.cb5 Rfb8 24.Ra5 Ke6 25.g3 d5 26.Ra6 Kd7 27.b6 d4 28.f4 ef4 29.gf4 Kc6 30.Kd3 Rb6 31.Rbb6 Rb6 32.Rb6 Kb6 0–1. gunar – shosan, ChessWorld.net, 2002.

3.Nf3 a5!? 4.ba5 Ra5=.

3.Nf3 Ba6 4.e4+/– e5 5.d4 (5.a4 Nf6) 5...Nd7 (5...d5 6.a3 de4 7.Ne5) 6.a4+/– ba4?? (7.Ba6 ed4 8.Nd4 Qe7+–; better is 6...Bb7). marcosr – stefandima (1790), net–chess.com, 2005.

3.Nf3 Bd7 4.e3 Na6 5.c3 g6 (better is 5...Nb8!?+=) 6.a4!+– Bg7 (6...ba4 7.Ba6 Pinning (7.Ba6 Deflection)) 7.ab5 (7.Bb5?! Nb4 8.d4 Nc6+=) 7...Nb4? (better is 7...Nb8+–) 8.Qb3 (8.cb4?! Bb2 9.Ra5 Bg7=) 8...a5 (8...Nc6 9.bc6 Bc6 10.Bb5 Bb5 11.Qb5 Kf8 12.d4+–) 9.cb4 a4 10.Ra4 (10.Bg7 ab3 11.Ra8 Qa8 12.Bh8 Qa4+=) 10...Ra4 (10...Nf6+–) 11.Bg7 (11.Qa4?! Bb2 12.d4 Bf5 13.b6 Kf8+–) 11...Ra1 12.Ba1 f6 13.Nc3 Qa8 14.Bb2 e5 15.Nd5 Qb7 16.Bc4 Bb5 (16...g5 17.b6! cb6 18.Nb6+–) 17.Bb5 Qb5 18.Nc7 (18.Nc7 Kd7 19.Qf7 Kc6 20.Nb5+–) 1–0. b4_player – johanna, internet, 2013.

3.Nf3 Nf6 4.g3 (4.a4 ba4 5.Nc3 e5=) 4...e5 5.Bg2 a6 (better is 5...e4!? 6.Nd4 d5=) 6.Ne5!+/– Ra7 (6...de5 7.Ba8) 7.Nf3 (7.Nd3 c5) 7...Be7 8.d3 Nc6 9.Nfd2 (9.a4!?) 9...Bd7 10.0–0 (10.Bc6 Bc6 11.e4 Bd7) 10...Nb4= 11.a3 Nc6 12.Nb3 Be6?? (better is 12...0–0=) 13.Bc6+– Kf8 (13...Bd7 14.Bd4 Bc6 15.Ba7+–) 14.Bd4 d5 15.Ba7 h5 16.N1d2 Qd6 17.Bb7 Qd7 18.Ba6 c6 19.Bb6 g6 20.Nc5 Bc5 21.Bc5 Kg7 22.Nf3 Bh3 23.Re1 Qg4 24.Ne5 Qe6 25.Nf3 Nh7?? 26.e4 Nf6 27.Bd4 Kg8 28.Ng5 Qd7 29.Bf6 Rh6 30.Nh3 Qh3 31.Qf3 (31...Qe6 32.ed5 cd5 33.Re6 fe6 34.Qe3 Kf7 35.Qh6 e5 36.Qg7 Ke6 37.Qe7 Kf5 38.Bc8 1–0. coloplayah (2145) – sammyo (1900), net–chess.com, 2006.

3.e3 a6

4.c4 Nc6 (4...c6 5.Qf3=) 5.a3 bc4 6.Bc4 d5 7.Bb3 Nb8 8.Qf3 (8.Nf3 e6+–) 8...c6 9.Nh3 Bh3 10.gh3 (10.Qh3 a5+=) 10...e6 11.Rg1 f6 12.Bc2 Nd7 13.Qh5 Ke7 14.Bh7 (14.d4 a5=) 14...Nh6 (14...a5 15.Qg6=) 15.Bg6 Nf7 16.Qe2 (16.Bf7 Rh5) 16...Nd6 (16...Nfe5 17.Be5 Ne5 18.f4 Ng6 19.Rg6=) 17.d3 e5 (17...Rh3 18.Rg2+=) 18.Qg4 Rb8 19.Bc3 c5 20.Nd2 (20.Bd2 Qc7+–) 20...Nb5+= Black plans d4 21.Bb2 d4 (21...cb4!? 22.ab4 Qb6+=) 22.Rc1 cb4 23.ab4 (23.Rc6 Nc7 24.ed4 ed4 25.Qe4 Ne5 26.Bd4 Rb5+–) 23...Nb6 24.ed4 ed4?? (better 24...Nd4 25.Bd4 Qd4 26.Qd4 ed4+–) 25.Qe4 Kd6 (25...Kd7 26.Bf5 Kd6 27.Qe6) 26.Rc6 Kd7 27.Qe6 1–0. petrobbo (2050) – Hislop, ChessWorld.net, 2016.

4.d4 Bb7 5.Nf3 Nf6 6.c4 Nc6 (6...bc4 7.Bc4 e6 8.a3+=) 7.a3 bc4 8.Bc4 e6 9.Nbd2 d5 10.Bd3 g6 11.Rc1 Bg7 12.Qa4 0–0 (12...Qd7 13.Nb3 Bf8 14.0–0+/–) 13.Rc6+– Qe8 14.Ne5 Ne4 15.Ne4 (15.Be4 Be5) 15...Be5 16.de5 Bc6 (16...Qc6 17.Nf6 Kg7+–) 17.Nf6 Kh8 18.b5! ab5 (18...Bb5 19.Qh4) 19.Qh4 (19.Ne8?! Ra4 20.Nf6 b4 21.ab4 Bb5+/–) 19...h5 20.Nh5! (20...Rg8 21.Nf6 Kg7 22.Qh7 Kf8 23.Qg8 Ke7 24.Ne8 Be8 25.Qg7+–) 1–0. Plock,Joerg – Adler,Bernd, R.–Tobies–Gedenkturnier–D, 2003.

4.Qf3 c6 5.Ne2 e5 6.a4 ba4 7.Ra4 Bb7 8.Nec3 Nf6 9.Ne4 Be7 10.Bd3 0–0 (10...a5 11.Nf6 Bf6 12.ba5 Ra5 13.Ra5 Qa5 14.0–0=) 11.Qh3 g6 12.Nbc3 Nbd7 13.Nf6 Nf6 14.b5?? (better is 14.0–0!?+=) 14...Bc8 (better is 14...cb5!? 15.Rh4 d5–+) 15.Qf3+= d5 16.Nd5 (16.bc6 e4 17.Be4 Rb8 18.Nd5 Nd5–/+) 16...Qd5 17.bc6 (17.Qd5!? Nd5 18.ba6–/+) 17...Qf3 18.gf3 Bd6 19.0–0 Nd5 20.Ba3 Ba3 21.Ra3 Nb4 22.Be4 Be6 (better is 22...f5!? 23.c3 fe4 24.cb4 Rb8 (worse is 24...Rf3 25.b5+=) 25.fe4 Rb4–+) 23.Rb1+= Nd5 24.c4 (better is 24.Ra5!? Nc7 25.Re5+=) 24...Nc7–+ 25.Ra5 (25.Rb7 Rac8–+) 25...f6 (25...Rfd8!? 26.Rb7 Rac8 27.Re5 Rd2 28.Kg2–+) 26.Bd5 Rfd8 27.e4 Kf7 28.Rb7 Rac8 (better is 28...Rdc8!?–/+) 29.Ra6= Rd6?? (better is 29...Re8=) 30.Raa7+– Ke8 31.Rc7 Rc7 32.Rc7 h5 (32...Kd8 33.Rh7 Kc8 34.Re7 Bd5 35.cd5+–) 33.Rg7 g5 34.c7 (34.c7 Bc8 35.c5+–) 1–0. winstonion – bhunterd, gameknot.com, 2013.

3.e3 c6

4.Qf3+=.

4.Nf3 e5 5.a3 Nf6 6.c4 Ba6 (6...e4!? 7.Nd4 a6=) 7.cb5+= cb5 8.Nc3 Be7 9.Bb5 Bb5 10.Nb5 0–0 11.0–0 Nbd7 12.Qb3 a6 13.Nc3 Qb6 14.d4 Qb7 15.d5 Nb6 16.e4 Rfc8 17.Rac1 Nc4 18.Ba1 Rc7 19.Rc2 Nh5 (19...Rac8 20.Rfc1+/–) 20.Ne2 Na5?? (better is 20...Rac8 21.Rfc1 Nb6+–) 21.Rc7 (21...Qc7 22.ba5 Qa5 23.Rb1+–; 21.ba5 Qb3 22.Rc7 Bd8–/+) 1–0. Plock,Joerg – Neffgen,Dieter, R.–Tobies–Gedenkturnier–D, 2003.

4.Nf3 Nf6 5.c4 bc4 6.Bc4 e6 7.0–0 g6 (7...d5!? 8.Be2 Bb4+=) 8.b5 d5 9.Be2 c5 10.a4 Bg7 11.d3 0–0 12.Nbd2 Nbd7 13.Ne5 Ne5 14.Be5 h6 15.Rc1 Qb6 16.Bf3 Bb7 17.e4 Rad8 18.ed5 Nd5? (18...Bd5 19.Nc4 Bc4 20.Rc4+=) 19.Bg7 (better is 19.Nc4 Be5 20.Nb6 (20.Ne5?! Nf4+=) 20...ab6 21.a5+–) 19...Kg7+= 20.Nc4 Qc7 21.d4 Nb4 22.Bb7 Qb7 23.Qe2 Rd4 24.Qe5 Kg8 25.Qc5 Rc4? (better is 25...Rg4 26.Ne3 Re4+/–) 26.Rc4 Nd5 27.Qa3 Nb6 28.Rd4 Nd5 29.Re1 a6 30.Rb1 Qb6 31.Qd3 ab5 32.Rb5 Qa7 33.Qb1?? (better is 33.Rc4+–) 33...Nc3 (33...Qd4 34.Qe1 Qa4 35.Ra5–+) 34.Rb7 (34.Qd3 Qd4!! 35.Qd4 Ne2 36.Kf1 Nd4 37.Ra5–+) 34...Qd4 35.Qe1 Na4 (35...Rd8!? 36.g3 Qa4 37.Qc3 Rd1 38.Kg2 Qe4 39.Qf3 Rg1 40.Kg1 Qf3 41.Rb5–+) 36.Rb4 Qc3 37.Qc3 Nc3 38.g3 Nd5 39.Rd4 Rb8 40.Rd1 Nc3 41.Re1 Rb2 42.Kf1 Kg7 43.Kg1 Ne2 44.Kf1 Nd4 45.Rd1 Nf3 46.Kg2 Ng5 47.Kf1 Ne4 0–1. Valpa – Janaj, playchess.de, 2005.

3.e4 e5

4.Bb5 c6 5.Bc4 d5 6.ed5 cd5 7.Bb5 Bd7.

4.Bb5 c6 5.Be2 d5 6.ed5+/– Qd5 7.Bf3 (7.Nf3 e4 8.Ne5) 7...e4 (7...Qe6 8.Qe2 Nd7) 8.Nc3 (8.Qe2 f5 9.Bh5 Kd8+–) 8...Qd4? (better is 8...Qe6!? 9.Be4 f5 10.Qh5 Kd8 11.Qg5 Kc7) 9.Be4 (9.Qe2 Qb4 10.Qe4 Qe4 11.Ne4 Nh6+–) 9...Qb4 (9...Nf6 10.Qf3 Ne4 11.Qe4 Qe4 12.Ne4) 10.Qc1 (10.Qf3 Ne7 11.Rb1 Be6+–) 10...Bc5 (10...Nf6 11.Bf3) 11.Nf3 Bg4 (11...f5 12.a3 Qc4 13.Bd3+–) 12.a3 (better is 12.0–0 Nf6 13.a3+–) 12...Qb6 (12...Qa5 13.Ne2 Nf6 14.Bf6 gf6 15.Qb2+–) 13.0–0 (13.Na4 Bf2 14.Kf1 Qa5 15.Kf2 Ne7+–) 13...Nf6 (better is 13...Be7+–) 14.Na4 Qa5 15.Nc5 Qc5 16.Bf6 gf6 17.Qe1 (17.d4!? Qh5 18.Qf4 0–0+–) 17...0–0 18.h3 Bf3 19.Bf3 (19...Qc2 20.d4+–; 19.gf3?! f5 20.Bd3 Nd7) 1–0. 1805DYDIDIDY – 7of9@, mySchach.de, 2005.

4.Bb5 c6 5.Be2 Nf6!?

4.Bb5 Bd7 5.Qe2 Be7 6.Bc4 Nf6 7.Nf3 0–0 8.d4 Bg4 9.Qe3 Bf3 10.Qf3 ed4 11.Bd4 Nc6 12.Bc3 Ne5 13.Be5 de5 14.0–0 Bb4 15.c3 Bd6 16.Nd2 Qe7 17.Qe3 a5 18.Nf3 Ng4 19.Qd2 Rfd8 20.Bd5 Bc5 21.h3 Nf6 22.Qg5 Nd5 23.Qe7 Ne7 24.Ne5 Bd6 25.Nf3 Rab8 26.Rab1 c5 27.a4 Ng6 28.c4 h6 29.Rfe1 Ne5 30.Rb8 Rb8 31.Nd2 Rb4 32.Rc1 Ra4 33.f4 Nd3 34.Rc2 Ra1 35.Kh2 Bf4 36.g3 Bd2 37.Rd2 Ne5 38.Rd5 Nc4 39.Rc5 Ra2 40.Kh1 Nd2 41.e5 Nf3 42.Rb5 Rh2 0–1. alessandrocarvalhaes (1690) – i_dude (1655), lichess.org, 2017.

4.Nc3 a5 5.a3 c6 6.Nf3=.

4.Nc3 a5 5.Nb5 ab4 6.d4 c6 –/+.

4.Nc3 c6 5.Nf3 (5.a4 ba4 6.Nf3 Nf6) 5...Bg4 (5...a5 6.a3=) 6.Be2 (6.a4 ba4 7.Ra4 Nf6) 6...Bf3 7.Bf3 Qg5 (7...a5 8.a3) 8.0–0 (8.a4 ba4 9.d4 ed4 10.Qd4 Nd7) 8...a6 (8...a5 9.a3) 9.d4 (9.a4 ba4 10.d4 Nf6) 9...ed4 (9...a5 10.a3) 10.Qd4 Nf6? (10...a5 11.Qb6 Qd8 12.Qb7) 11.Rfe1 (11.Qb6 Ng4 12.Bg4+–) 11...Be7?? (better is 11...Nbd7) 12.e5+– de5 (12...0–0 13.ef6 Bf6 14.Qd6 Bc3 15.Bc3 Ra7+–) 13.Re5 0–0 (13...Qe5 14.Qe5 Kf8+–) 14.Rg5 Nfd7 (14...Rd8 15.Qe5 Kf8+–) 15.Qg7 1–0. ureo – crome, ChessWorld.net, 2005.

4.Nf3 h6 5.Bb5 Bd7 6.Be2 Nc6 7.a3 Nf6 8.d3 Be7 9.b5 Na5 10.a4 Nb7 11.0–0 0–0 12.Nbd2 Nc5 13.h3 a6 14.c3 ab5 15.a5 Na4 16.Ba3 Nc3 17.Bb4 Na4 18.d4 c5 19.Bc3 Nc3 20.Qc2 b4 21.Rfe1 cd4 22.a6 Bc6 23.Bd3 Qb6 24.Nc4 Qc5 25.Ncd2 Bb5 26.Nb3 Qc6 27.Na5 Qd7 28.Nb7 Bd3 29.Qd3 Qc7 30.Nd2 Nh5 31.Nc4 Nf4 32.Qf1 Bg5 33.Nb2 Ra6 34.Qa6 Nce2 35.Kh1 Nc3 36.Nd6 Bh4 37.Rf1 d3 38.Nbc4 Nfe2 39.Ne5 d2 40.Nef7 Rf7 41.Nf7 Qf7 42.Qd3 Bg5 43.Kh2 Bf4 44.Kh1 Qg6 45.g3 Bg5 46.h4 Bf6 47.Qd2 Bd4 48.Rae1 Qe4 49.f3 1–0. alessandrocarvalhaes – Benvolio, lichess.org, 2016.

3.Nf3 e5

4.d3 Nf6 5.g3 Bb7 (5...a5 6.ba5 Ra5 7.Bg2=) 6.Bg2 Nbd7 7.0–0 Rb8 (7...a5 8.ba5 Ra5 9.Nbd2+=) 8.c3 (8.Nbd2 Nb6+/–) 8...h6 (8...Nb6 9.Nbd2=) 9.Qc2 (9.a4 a6+/–) 9...Nh7? (better is 9...Nb6!?+=) 10.a4 ba4 11.Ra4 a6 12.e3 (12.Nbd2 Be7+/–) 12...Ng5 (12...Be7 13.d4+/–) 13.Nh4 (13.Ng5!? hg5 14.Bb7 Rb7 15.Ra6+–) 13...Bg2+/– 14.Kg2 Ra8 (14...Qc8!?+/–) 15.Nd2+– Be7 16.Rfa1 (16.d4 0–0+–) 16...Qc8+/– 17.Nb3 (17.Ra5!?+/–) 17...Nb6+= 18.R4a2 Qh3 19.Kh1 Qc8 (19...0–0 20.c4+= (20.Ra6?? Ra6 21.Na5 Rfa8–+)) 20.b5 (20.e4 Ne6 21.Nf5 Bg5+/–) 20...0–0 (better is 20...Nh3!? 21.Nf3 ab5 22.Ra8 Na8=) 21.ba6 Nh7 (21...Nh3 22.Nf3+/–) 22.Nf3 Ng5 23.Ng5 Bg5 (23...hg5 24.c4+/–) 24.Qe2 (24.c4 Ra7+–) 24...Qd7 (24...Ra7 25.Nd2+/–) 25.Nd2 (25.a7 c5 26.f4 ef4 27.ef4 Rfe8+/–) 25...f5 (25...Ra7 26.c4+–) 26.Nf3 (26.a7 Nc8 27.d4 c5 28.de5 de5 29.Qc4 Rf7+/–) 26...Qc6 27.Kg1 Bf6 (27...Ra7 28.e4+–) 28.c4 (28.a7 Nc8 29.d4 e4+/–) 28...e4 (28...Ra7!?+/–) 29.Nd4+– Qd7 (29...Bd4 30.Bd4 (worse is 30.ed4 ed3 31.Qd3 Nc4+–) 30...ed3 31.Qd3 Nc4 32.Ra4+–) 30.f4 (30.a7 Rfe8+–) 30...Rfe8 31.Qc2 (31.Qd2 c5 32.Nb5 d5 33.Bf6 gf6+–) 31...c5 (31...Qf7 32.Nb5 ed3 33.Qd3 Ra6 34.Ra6 Bb2+–) 32.Nb5+– Bb2 (better is 32...d5 33.Bf6 gf6+–) 33.Rb2 (33.Qb2?! ed3 34.Qb3 d5 35.cd5 c4= (worse is 35...Re3 36.Nc3 Qd6 37.Rb1+/–)) 33...d5 (33...Qc6 34.d4+–) 34.cd5 Nd5 35.Qc5 Rec8 (35...Rac8 36.Qd6 Qf7 37.Qa3 ed3 38.a7+–) 36.Qd6 Qd6 (36...Qf7 37.Qe5 Ra6 38.Ra6 Rc1 39.Kf2+=) 37.Nd6 Rc3 (37...Rd8 38.Nb7 Rdc8 39.de4 Ne3+–) 38.de4 fe4 (38...Ne7 39.Rb7 Rc6 40.e5+–) 39.a7 Kh7 40.Rb8 Ra7 (40...Nc7 41.Ne8! Ra7 42.Ra7 Ne8 43.Re8+–) 41.Ra7 Rc1 42.Kf2 Rc2 43.Kg1 Rc7?? (43...Rc1 44.Kg2 Ne3 45.Kh3 Rc5+–) 44.Rc7+– Nc7 45.Ne4 Ne6 46.Kg2 (better is 46.f5 Nc7 47.Rb7 Nd5+–) 46...Kg6 47.g4 Kh7 48.h4 g6 49.Rb7 Ng7 50.Nf6 1–0. Martinez Pastor,F – Sanchez Astillero,Manuel, ESP–ch Veterans, 2010.

4.e4 a6 5.a4 ba4 6.Nc3 Bd7 (7.Bc4 Ra7). thinkerx – danelson, net–chess.com, 2005.

4.e4 a6 5.Be2 Be7 6.d3 (6.0–0 Nc6+/–) 6...h6 (6...Nc6 7.d4 f5 8.de5 fe4 9.Qd5 Nb4 10.Qa8 (10.Qe4? d5 11.Bb5 ab5–+) 10...Nc2 11.Kf1 ef3 12.Qc6 (worse is 12.Qf3 Na1 13.Qg3 g6–/+) 12...Bd7 13.Qc2 fe2 14.Qe2 de5 15.Be5+=) 7.Nc3 Nf6 8.0–0 Nh7? (better is 8...Nc6!?+=) 9.Nd5 c6 10.Ne7 Qe7 11.a3 (11.a4!? Nd7+–) 11...Bg4+/– 12.Qd2 Bf3 13.Bf3 (worse is 13.gf3 Qg5 14.Qg5 Ng5=) 13...Ng5 14.Bg4 0–0 15.Rfe1 (15.f4!? ef4 16.Qc3+– (16.Rf4?! Nd7+=; 16.Qf4?! Nd7+/–)) 15...Nd7+= 16.c3 Nf6 17.Bd1 Rad8 18.h4 Ne6 19.Bb3 Nh7 20.g3 Kh8 21.d4 Nc7 22.Rad1 f5? (better is 22...Nf6+/–) 23.ef5+– Rf5 (23...e4 24.f3! d5+–) 24.c4?? (better is 24.de5!? Re5 25.c4 Re1 26.Re1+– (26.Qe1?! Qe1 27.Re1 Rd7+–)) 24...bc4 (24...e4 25.cb5 cb5 26.d5+/–) 25.Bc4 (better is 25.Bc2 Rff8 26.de5+–) 25...d5? (better is 25...e4+/–) 26.de5 Nf8? (26...Rdf8 27.Be2 Rf2 28.Bd4+–) 27.a4 (better is 27.Bd3 Rf7 28.Rc1+–) 27...Nfe6 28.Bd3 Rff8? (better is 28...Rf3+–) 29.f4 Qe8 (29...Rb8 30.f5 Qb4 31.Qb4 Rb4+–) 30.f5 Rd7 (30...c5 31.fe6 Ne6 32.Bb1 cb4 33.Qb4+–) 31.fe6 Qe6 32.Rf1 Rdf7 33.Rf7 Rf7 34.Bd4 Qh3 35.Qg2 Qg4 36.Be2 Qc8 37.Bh5 (37.Rf1 Qe6+–) 37...Re7 38.g4 (better is 38.Qf2 Ne6+–) 38...Ne6 39.Bb6 (better is 39.Bc3 d4 40.Bd2+– (40.Bd4?! Rd7+–)) 39...Nf4 40.Qg3?? (better is 40.Qf3 Nh5 41.gh5 Re5 42.Rd4+–) 40...Ne2–+ 41.Kf2 Ng3 42.Kg3 Qb8 43.Bc5 (43.Bd4 c5 44.Bf2 Qe5 45.Kg2 Qe4 46.Kg3–+) 43...Re5 44.Kf3 Re4 45.Bg6 (45.Kg2 g6! 46.Rf1–+) 45...Qf4 0–1. croach (2385) – axxle (2310), net–chess.com, 2015.

2.Bb2 e5

3.a3 a5 4.e3+=.

3.a3 a6 4.Be5+= f6 (4...Nc6 5.Bb2+=) 5.Bb2 c6 6.e3 a5 7.c3 a4 (7...d5 8.Bd3+/–) 8.Nf3 (8.c4 bc4 9.Bc4 d5+–) 8...h5 (8...d5 9.Bd3+/–) 9.d4 (9.c4!? bc4 10.Bc4 d5+–) 9...d5 10.Nbd2 g5 11.h3 (11.Bd3 Bd6+–) 11...h4 (11...Bf5 12.Qe2+/–) 12.Bd3+– Qe7 13.0–0 (better is 13.Qc2+–) 13...Na6? (better is 13...g4!? 14.hg4 Bg4+/–) 14.Re1 (better is 14.e4 de4 15.Be4+–) 14...Bb7? (better is 14...f5+–) 15.e4 de4 16.Re4 Qe4 17.Ne4 f5 18.Nd6! Bd6 19.Qe2 Kd7 20.Ne5 Kd8 21.Nf7 Kd7 22.Bf5 Kc7 23.Nd6 Kd6 24.Qe5 1–0. Fournier,Frederic (2215) – Horeau,Remi, Grand Prix Oise, 2002.

3.a3 c5 4.bc5+= Bc5 (4...Nc6 5.e3+=) 5.Be5+/– f6 (5...Nf6 6.e3 Bb7 7.Nf3+/– (7.Bb5?? Bg2 8.Be2 Bh1–+)) 6.Bb2 d5 7.e3 (7.e4 a6 8.d4+/–) 7...Nc6? (better is 7...a6!?+/–) 8.Bb5+– Bd7 9.c4 dc4?? 10.Bc4 Nge7?? 11.Nf3 Na5 12.Ba2 Nf5 13.0–0 Qc7 14.d4 Bd6 15.Nbd2 g5 16.h3 h5 17.Ne4 Ke7 18.Nd6 Qd6 19.e4 g4 20.ef5 gf3 21.Qf3 Rag8 22.Rfe1 Kd8 23.Bg8 Rg8 24.Qa8 Bc8 25.Rac1 Qd7 26.g3 Re8 27.Re8 (27.Re8 Ke8 28.Rc8 Ke7 29.Rh8+–) 1–0. Fournier,Frederic – chuco, Active, 2008.

3.a3 Nc6 4.e4 a6 5.Nf3 d6 6.c4 Nf6 7.Qc2 Be7 (better is 7...Na7!?+=) 8.cb5+– Nd4 (8...Nb8 9.ba6 Ba6 10.Ba6 Ra6 11.0–0+–) 9.Nd4 ed4 10.ba6 (better is 10.Bd4 0–0 11.ba6+–) 10...Ba6?? (10...c5 11.Bb5 Bd7 12.Qd3+/–) 11.Ba6 (better is 11.Qc6 Nd7 12.Ba6+–) 11...Ra6 12.Bd4 c6 (12...0–0 13.0–0+–) 13.0–0 0–0 14.Nc3 h6 15.Qd3 (15.a4 c5 16.Bf6 Bf6+–) 15...Ra8 (15...Qa8 16.Qg3+–) 16.Qg3 c5 17.bc5 (17.Be3 Kh8+–) 17...dc5 18.Be3 Nh5 19.Qe5 Nf6 20.Bc5 Bc5 21.Qc5 Qd2 22.f3?? (better is 22.Rfd1 Qf4 23.Nd5 Qe4 24.Nf6 gf6 25.Qc3+–) 22...Rfc8–+ 23.Qb4 Rc3 24.Rfd1 Qe3 25.Kh1 Rca3 26.Ra3 Qa3 27.Qb7 Qa1 28.Rb1 Qa7 29.Qc6 Nd7 30.h3 Ne5 31.Qd5 Re8 32.Kh2 Qd7 33.Qa2 Qd6 34.Kh1 h5 35.h4 Qc5 36.Kh2 Ng6 37.g3 Ne5 38.Kg2 Rc8 39.Rb2 Nd3 40.Rd2 Nc1 41.Qb2 Qc3 42.Kh3?? Qb2 43.Rb2 f6 44.Kg2 Nd3 45.Rd2 Ne5 46.Kf2 Kh7 47.Ra2 Nd3 48.Ke3 Rc3 49.Kd2 Nb4 50.Kc3 Na2 51.Kb3 Nc1 52.Kc2 Ne2 53.g4 hg4 54.fg4 Kh6 55.Kd3 Nf4 56.Ke3 Ng2 57.Kf3 Nh4 58.Kg3 g5 59.Kf2 Ng6 60.Kf3 Ne5 61.Kg3 Kg6 62.Kh3 Nf3 63.Kg3 Nd2 64.Kf2 Ne4 65.Kf3 f5 66.gf5 Kf5 67.Kg2 g4 68.Kf1 g3 69.Kg2 Kf4 70.Kf1 Kf3 71.Kg1 g2 (72.Kh2 Kf2 73.Kh3 g1Q 74.Kh4 Qg3 75.Kh5 Qg5 0–1. losertoo (1860) – iboyd (1950), net–chess.com, 2006.

3.a4 Bb4 4.Be5+= Nf6 (4...f6 5.Bf4 ba4 6.Ra4+=) 5.ab5+– a5 (5...Bb7 6.Ra4 a5 7.ba6 Na6 8.e4+–) 6.e3 d6 (6...Bb7 7.Nf3+–) 7.Qf3 Ra7 (7...d5!?+–) 8.Bf6+– Qf6 (8...gf6 9.b6! Rb7 10.c3+–) 9.Qf6 gf6 10.b6! cb6 (10...Rb7 11.bc7 Nd7 12.c3+–) 11.c3 Bc5 (11...Nc6 12.d4+–) 12.d4 Bf5 (12...Ke7 13.dc5 dc5 14.Nf3+–) 13.Ne2 (13.dc5 dc5 14.Bb5 Ke7+–) 13...Bb1 14.Rb1 (worse 14.dc5 Be4 15.cb6 Rb7+–) 14...Ba3 (14...Nd7+–) 15.Rb6 0–0 (15...Nd7 16.Rb3 Bc5 17.dc5 dc5 18.Nf4+–) 16.Rb3 Nd7 (16...Bc5 17.dc5 dc5 18.Nc1+–) 17.Ra3 Rb8 18.Ra2 1–0. pcmvr – ctessman, net–chess.com, 2017.

3.a4 c6 4.Be5+– d6 5.Bg3 Nf6 (5...ba4!? 6.Nf3 Nf6+–) 6.ab5+– cb5 7.e3 Bg4 (better is 7...Nc6+–) 8.Bb5 Ke7 (8...Bd7 9.Bd7 Nbd7+–) 9.Nf3 h6 (9...Qc8 10.Nc3 Qb7 11.Be2+–) 10.c4 Ne4 (10...a6 11.Nc3+–) 11.Nc3 Nc3 12.dc3 Kf6 (12...a6 13.Qd5 Be6 14.Qa8 ab5 15.cb5 Kf6+–) 13.Qd4 Ke7 14.Qg4 f6 15.Qe4 Kf7 16.Qa8 (16.Qd5 Kg6 17.c5 Qd7 18.Bd3 f5 19.Bf5 Qf5 20.Nh4 Kh7 21.Qf5 Kg8 22.Qd5 Kh7 23.Qe4 Kg8 24.Qa8 a5 25.cd6 Kh7 26.Qe4 Kg8 27.Qe6 Kh7 28.Qf5 Kg8 29.Ng6 Nc6 30.Qf8 Kh7 31.Qh8 Kg6 32.Qe8 Kh7 33.Qc6 h5 34.d7 a4 35.Qe4 Kh6 36.d8Q g6 37.Qf6 a3 38.Qfg6) 16...g5 17.Ra7 Be7 18.Qd5 Kg7 19.Bd6 Kg6 20.Qe4 Kf7 (20...f5 21.Qe6 Kg7 22.Be7 Qd1 23.Kd1 Nd7 24.Bf6 Kg6 25.Bh8 Kh7 26.Rd7 Kh8 27.Qe8) 21.Ne5! fe5 (21...fe5 22.Qf5 Mate attack) 22.Qf5 Kg8 23.Re7 Qe7 24.Be7 Nc6 (24...Kg7 25.Qf6 Kh7 26.Qf7) 25.Qg6 1–0. pcmvr (2830) – valerypavlovich (2105), net–chess.com, 2014.

3.e3 Bb4 4.Qf3 (better 4.Be5 Nf6 5.Qf3+–) 4...Nf6?? (better 4...Nc6 5.Be5 f6+=) 5.Qa8+– Bd2 (5...Ba6 6.a4 ba4 7.Ba6 Na6 8.Qd8 Kd8 9.Ra4 Nb8 10.Rb4 Nc6+–) 6.Nd2 Nd5 (6...Nc6 7.Bb5 Nb4 8.Ba4+–) 7.Qb8 Ne3 (7...Nb4 8.Rc1 Nc6 9.Qb5+–) 8.fe3 0–0 9.Ngf3 (better 9.Qa7 d6+–) 9...Qe7 10.Qc7 e4 11.Qc3 ef3 12.Qg7 1–0. DEFFM – GuestKLKZ, freechess.org, 2018.

3.Be5 Qe7 4.Bb2 Qb4 5.Qc1 Nf6 (5...Bb7 6.Nf3=) 6.e3 (6.Bf6 gf6 7.Nc3 c6+=) 6...Ne4= 7.Nf3 f6 8.Bd3 Nd6 9.0–0 Nc6 10.a3 Qg4 (10...Qc5 11.Nc3+=) 11.h3 (11.Nc3 Qh5 12.a4 b4+=) 11...Qe6 (11...Qh5 12.Nc3=) 12.Nd4 Nd4 13.Bd4 (13.ed4 Be7+=) 13...Bb7= 14.Nc3 Nf5? (14...a6 15.a4=) 15.Bf5 (better 15.Nb5 Kd8 16.Ba7+–) 15...Qf5+= 16.Qd1 (16.e4 Qh5+= (16...Be4? 17.Ne4 Kf7 18.Ng3+–)) 16...Qg6 (16...c5 17.Nb5 cd4 18.Nc7 Kf7 19.Na8 Ba8 20.ed4=+) 17.Qg4 (17.e4!?=) 17...Qg4=+ 18.hg4 0–0–0 (better 18...c5 19.Nb5 cd4 20.Nc7 Kd8 21.Na8 de3 22.fe3 Ba8–/+) 19.Ba7+= (19.Ba7 Ba3 20.Nb5+–; worse 19.Nb5 a6 20.g5 ab5 21.gf6 gf6 22.Bf6 Rg8–/+) 1–0. sirgeshdb – jcjaycee, lichess.org, 2020.

3.Be5 f6 4.e3 fe5 5.Qh5 Ke7 6.Qe5 Kf7 7.Qd5 Ke8 8.Qa8 Nc6 9.c3 a6 10.a4 Nge7 11.ab5 ab5 12.Nf3 Nd5 13.Bb5 Nb6 14.Qa2 Bb7 15.d4 d5 (15...Ne7+–) 16.Qa7 Qb8 (16...Qc8 17.Ne5 Bd6 18.Qb7 Qb7 19.Bc6 Qc6 20.Nc6 Kd7+–) 17.Qb8 1–0. orane (2215) – kdfoerster, Live Game Caissa's Web, 2004.

3.Be5 Nf6 4.e3+/– Nc6 5.Bb2 (5.Qf3 Bb7+/–) 5...a6 (5...Nb4 6.Bb5 Rb8 7.Nc3+=) 6.a3 Be7 (6...d5 7.Nf3+/–) 7.Nf3 0–0 8.c4 bc4 9.Bc4 d5 10.Be2 Bd6 11.Nc3 Qe7 12.0–0 Ne5 13.d3 Bg4 14.Ne5 (14.Nd4 Bd7+/–) 14...Be2 (14...Qe5 15.g3 Be2 16.Qe2+/–) 15.Qe2 (15.Ne2 Be5 16.Be5 Qe5+–) 15...Be5 16.g3 (better is 16.f4 Bc3 17.Bc3+/–) 16...Qd6?? (16...Rfe8 17.Rfc1+/–) 17.Na4?? (better is 17.d4 Bd4 18.ed4+–) 17...Bb2+/– 18.Qb2 Rad8 19.Nc5 Ng4 20.Kg2 Rb8 21.Qe2 Ne5 22.Rac1 d4 23.e4 Rfd8+/– 24.f4 Nd7 25.Nd7 Rd7+/– 26.Rc4 Qb6 27.Rfc1+– Rb7 28.Qc2 h6 29.Rc6 Qb5 30.Qc4 Qh5 31.Qa6 Qe2+= 32.Kg1 Rb8? 33.R6c2+– Qe3 34.Kf1?? Qf3= 35.Ke1 Qh1 36.Kf2+/– Qh2 37.Kf3 Qh5 38.Kg2 Rbd8 39.Rc7?? Qe2= 40.Kh3 Rc7 41.Rc7 Qf1 42.Kg4?? Qe2 43.Kh3 Qf1 44.Kg4?? Qe2 45.Kh3 ½–½. Fournier,Frederic (1650) – apantoja815, Active, 2007.

3.Be5 Qg5 4.Nf3+– Qf5 (4...Qd8 5.a4 ba4 6.Ra4+–) 5.Nc3+– Bb4?? (better 5...c6+–) 6.Bg7 (6.Bc7?! Bc3 7.dc3 Bb7+–) 6...Bc3 7.dc3 (7.Bc3?! f6+–) 7...f6 (7...Bb7 8.Bh8 a6 9.e3+–) 8.Bh8 (8.Qd3 Qd3 9.cd3 Ne7 10.Bh8 Kf7+–) 8...Qc5 (8...Bb7 9.e3+–) 9.Qd3 (9.Qd4 Qc6+–) 9...d5 (9...Bb7 10.Rb1 a6 11.a4+–) 10.0–0–0 (10.e4 Be6 11.Nd4 Bf7 12.Qb5 Qb5 13.Bb5 Kf8+–) 10...c6 (10...Qa3 11.Kb1 Be6 12.Nd4+– (12.Qh7 d4 13.Qg6 Ke7 14.Bf6 Nf6 15.Qg7 Ke8 16.Qh8 Ke7=)) 11.Qh7 Qa3 12.Kb1 (12.Kd2 Qf8+–) 12...Be6 13.Nd4 Bf7 (13...Qe7 14.Qe7 Ke7 15.e3+–) 14.Rd3 c5 (14...Qf8+–) 15.Nb5 Qa5 16.Nd6 (16.Nd6 Kd7 17.Qf7 Ne7 18.Rd5+–) 1–0. Marcus – 944, internet, 2018.

3.Be5 Qh4 4.a3. GuestNKJR – GuestHTLN, freechess.org, 2017.

3.a3 d6

4.e3 a6 5.Nf3 (5.c4 bc4 6.Bc4 c6+=) 5...Bg4 (5...Nf6 6.d3=) 6.Be2 Nf6 7.h3 Bh5 (7...Bd7 8.0–0=) 8.0–0 Be7 9.d3 0–0 10.Nbd2 Nbd7 11.c4 c6 12.Nh2 (12.Qc2 Re8=) 12...Be2 13.Qe2 d5 14.cb5 cb5 (14...ab5 15.Rac1 Qc7 16.Qf3=+) 15.f4= ef4 16.Rf4 Re8 17.Raf1 Rc8 18.Ng4 Rc2 19.Qd1?? (better 19.Bd4=) 19...Rb2–+ 20.Nf6 (20.Qc1 Ra2 21.Nf2 Bd6–+) 20...Nf6 (20...Bf6 21.Qc1 Qc8 22.Qc8 Rc8 23.Nf3–+) 21.Nf3 (21.Qc1 Ra2 22.Nb1 Qb6–+) 21...d4! 22.e4 (22.ed4 Nd5 Combination; 22.Nd4 Nd5 Combination; 22.Rd4 Qc7 Combination) 22...Bd6 23.e5 (23.Rf5–+) 23...Be5 24.Ne5 Re5 25.Qa1 Ree2 26.R4f2 Qe8 27.Qc1 Rbc2! 28.Qa1 (28.Qc2 Rc2 Combination) 28...Nd5 (better 28...Qe3 29.Kh1 Ng4 30.Qd4 Nf2 31.Kh2 Qd4 32.a4 Qf4 33.Kg1 Nh3 34.Kh1 Qf1 35.Kh2 Qg2) 29.Qd4 Ne3 30.Re2 Re2 31.Rf2 Rf2 (better 31...Re1!? 32.Kh2–+) 32.Kf2 Nf5 (32...Nc2 33.Qc3 Qe3 34.Kf1 Qf4 35.Kg1 Qd4 36.Qd4 Nd4 37.Kf2–+) 33.Qc5 (33.Qf4 Qc8–+) 33...g6 (33...Qe6 34.g3–+) 34.g4 Ng7 35.d4 Ne6 36.Qe5 Qd7 (36...Qd8 37.d5 Nc7 38.d6–+) 37.d5 Nc7 38.d6 Ne6 (38...Ne8!? 39.Qe7 Qe7 40.de7–+) 39.Ke3 (39.Qd5 Nf4 40.Qd2 g5–+ (40...Nh3?! 41.Kg3–+)) 39...Qa7 40.Ke4 (40.Ke2 Qg1 41.d7 Qg2 42.Ke1 Qh3 43.Qb8 Kg7 44.Qe5 Kh6–+) 40...Qf2 41.Kd5 (41.Kd3 Qf3 42.Kd2 Qg2 43.Qe2 Qh3–+) 41...Qd2 (better 41...Qf3 42.Qe4 Nf4 43.Kd4 Ne2 44.Qe2 Qe2–+) 42.Kc6 Qc2 (better 42...Qc1 43.Kb6 Qa3–+) 43.Kb7?? (43.Kb6 Qb3 44.d7 Qd3 (44...Qa3?! 45.Qe6 fe6 46.d8Q Kf7 47.Qc7 Kf6 48.Qf4 Ke7 49.Qc7 Kf8 50.Qd6 Kg7 51.Qe5 Kh6 52.Qf4 Kg7 53.Qe5 Kg8 54.Qb8 Kf7 55.Qc7 Ke8 56.Qc8 Ke7 57.Qc7 Kf6 58.Qf4 Ke7 59.Qc7=) 45.Qb8 Kg7–+) 43...Qg2 (better 43...Nd8 44.Ka7 Nc6 45.Ka6 Ne5 46.Kb7 Qc6 47.Ka7 Nc4 48.g5 Nd6 49.a4 Qb7) 44.Ka6 Qa8 (44...Qh3!? 45.Kb5 Qa3 46.Qd5–+) 45.Kb5–/+ Qa3 46.d7? (better 46.h4–/+) 46...Qd3–+ (46...Qh3?! 47.Qe6 Qd3 48.Qc4 Qd7 49.Ka5=+) 47.Kc6 (47.Ka5 Qd7 48.b5 Qa7 49.Kb4 Qe7 50.Kc4 Qa3 51.Qb8 Kg7–+) 47...Qa6 48.Kd5 Qb5 49.Kd6 (49.Ke4 Ng5 50.Kf4 Nh3 51.Ke4 Qd7 52.Kf3–+) 49...Qe5 (better 49...Qb4 50.Kc6 Qa4 51.Kb6 Qd7 52.Qb8 Kg7–+) 50.Ke5+= Kf8 51.Kd6 h6 52.b5 Nd8 53.b6 f5 (53...f6 54.h4 h5 55.gh5 gh5 56.Kd5–+) 54.gf5 gf5 55.Ke5 Ke7 56.Kf5 Kd7 57.Kg6 Kc6 58.Kh6 Kb6 59.h4 Kc6 60.Kg6 Kd7 61.h5 Ke6 62.h6 Nf7 63.h7 Ke7 64.Kg7 Ke8 65.h8Q Nh8 ½–½. KLINGON09 (1810) – icioigop (1810), lichess.org, 2020.

4.e3 Nf6 5.Bb5+– c6 6.Be2 Be7 7.Nf3 0–0 8.c4 a5 9.b5 cb5 10.cb5 Bb7 11.0–0 a4 (11...Nbd7 12.Nc3+–) 12.Qc2 (12.Nc3 Qa5+–) 12...Qb6 13.Nc3 Rc8 14.Qf5 g6 (14...Rc5 15.Qh3+–) 15.Qh3 Ne4?? (better 15...Nbd7+–) 16.Ne4+– 1–0. GuestMHHR – GuestFGFP, freechess.org, 2017.

3.e3 a6

4.a4 ba4!? 5.Ra4 Nc6+=.

4.a4 c6 5.Be5+/– Nf6 (5...d6 6.Bc3 ba4 7.Nf3+/–) 6.ab5+– cb5 7.Qf3 Nc6 8.Bf6 gf6 9.Bb5! Bb7 (9...ab5 10.Ra8 Pinning (10.Ra8 Deflection)) 10.Bf1 Be7 11.c3 0–0?? (better is 11...Nb4 12.Qf5 Nd5+/–) 12.Bd3+– Ne5 13.Qb7 Nd3 14.Ke2 Nc1 15.Kd1 Nd3 16.Nh3 Rb8 17.Qa6 d5 18.Qd3 Ra8 19.Na3 Qd7 20.Nf4 Qg4 21.f3 Qg2 22.Ng2 1–0. Fournier,Frederic (1990) – NN, Active, 2004.

4.Be5 Nc6 5.Bb2 Nb4 6.a3 Nc6 7.c4 bc4 8.Bc4 Bb7 9.Qf3 Nf6 10.Qg3 (10.Bf6 Qf6 11.Qf6 gf6=) 10...Na5 11.Ba2 Bd6?? (better is 11...d6=) 12.Qh4 (better is 12.Qg7 Rf8 13.Bf6+– (< 13.Qf6 Qf6 14.Bf6 Bg2–/+)) 12...Be7 (better is 12...Bg2 13.Qg5 Bh1 14.Qg7 Rf8 15.Bf6 Be7 16.Be7 Qe7–/+) 13.Qa4?? (13.Qg3 0–0=) 13...c5?? (better is 13...Bg2 14.Qa5 Bh1–+) 14.Nf3= Bc6 15.Qf4 (15.Qc2 Rb8=) 15...0–0 16.0–0 d5 (16...Qb8 17.Be5 d6 18.Bf6 Bf6=+) 17.Ng5 (17.d3!?=) 17...Bd6 (17...d4 18.Qf5 Rb8–+) 18.Qh4= h6 19.f4? (better is 19.Nf3=+) 19...hg5 20.fg5 Nh7 21.g6 (21.Rf5–+) 21...Qh4 22.Rf4 Bf4 23.gh7 Kh8 24.ef4 Qf4 (24...Qe1) 25.g3–+ Qf3 26.d4 cd4 (better is 26...Qe3 27.Kh1 Qe1 28.Kg2 Qe2 29.Kg1 Qb2 30.a4–+) 27.Nd2 Qe3 28.Kg2 Qd2 29.Kh3 d3 (29...Bd7 30.g4 f5 31.Kg3 fg4 32.Rf1 Qe3 33.Kh4 Qh3 34.Kg5 Qh6) 30.Bc1 Qf2 (30...Qe2 31.Kh4 Qh2 32.Kg4 f5 33.Kf4 Qf2 34.Ke5 Rae8 35.Kd6 Rf6 36.Kc7 Qa7) 31.Bf4 d4 (31...Bd7 32.g4 Qf3 33.Bg3 g5 34.Bd5 Bg4) 32.Bd5–+ (32…Bd5 33.Ra2 Qf3 34.Kh4 f5 35.h3 Bf7 36.g4 Qf4 37.Rd2 g5) 1–0. slavisa11 – TheGuy, Live Game Caissa's Web, 2004.

4.Be5 Nc6 5.Bc3 Nb4 6.Bb4 Bb4 7.c3 Bd6 8.Qf3 Rb8 9.Bd3 Nf6 10.Ne2 Bb7 11.Qh3 0–0 12.0–0 c5 13.Ng3 c4 14.Bc2 Bc7 15.Nf5 d5 16.Qg4?? (16.d4 g6 17.Nh6 Kh8–/+) 16...g6 (better is 16...Ng4 17.f4 Qf6–+) 17.Nh6 (17.Qg5 Nd7 18.Qd8 Rfd8–/+) 17...Kh8 (better is 17...Kg7 18.Qg5 Bc8–+) 18.h4?? (better is 18.Qd4–/+) 18...Ng4–+ 19.Ng4 Qh4 (20.f4 Qg4–+) 0–1. slavisa11 – TheGuy, Live Game Caissa's Web, 2004.

3.e3 Nc6

4.a3 d5 5.Bb5 Bb7 6.Be5 Qg5 (6...a6 7.Ba4+–) 7.Nf3 Qg2 (7...Qe7 8.Nc3 0–0–0 9.Bc6 Bc6 10.Bd4+–) 8.Rg1 Qh3 9.Rg7 0–0–0 (9...Qd7+–) 10.Rg3 Qe6 11.Bh8 Nf6 (11...Be7 12.Bb2+–) 12.Ng5 Qe5 (12...Qe7 13.Nc3+–) 13.Nc3 (better 13.Nh7 Be7 14.d4 Qf5 15.Bf6 Qh7 16.Qg4 Kb8+–) 13...Bh6 (13...Qe7 14.Bf6 Qf6 15.Nh7+–) 14.Nf7 Qh5 (14...Qe6 15.Nd8 Nd8 16.Bf6 Qf6 17.Qg4 Kb8 18.Qd7+–) 15.Nd8 Nd8 16.Bf6 Qh2 17.Qg4 (17.Rg8!? Qh1 18.Bf1 Ba6+–) 17...Kb8 18.Qg8 (18.Qg8 Bc8 19.Qd8+–) 1–0. GuestDRTL – GuestJGLQ, freechess.org, 2017.

4.a3 Nf6 5.c4 (5.Bb5 Bb7+=) 5...a6 (5...bc4!? 6.Bc4 Rb8=) 6.cb5+= ab5 7.Bb5 Ba6 8.Bc6 dc6 9.Qf3 (9.Be5 Nd7 10.Bc3 c5+/–) 9...Bb5 (9...e4 10.Qd1 Bd3 11.Nh3=) 10.a4?? (better is 10.Nc3!? Ra6 11.Nb5 cb5 12.Be5+/–) 10...Ra4 (10...e4!? 11.Qf5 Bd3=+) 11.Ra4+= (11.Be5?? Ra1 12.Ba1 Qd3–+) 11...Ba4 12.Nc3 (12.Be5 Nd5 13.Ne2 Qg5+=) 12...Bb5 (12...Bb4!? 13.Qf5 0–0=+) 13.Nb5 cb5 14.Qc6 Qd7 15.Qa8 Qd8 16.Qc6 Qd7 17.Qd7 Nd7 18.Ne2 (18.Nf3 f6 19.Bc3 c5 20.bc5 Bc5=) 18...Bd6 (better is 18...Bb4!? 19.Kd1 Ke7–/+) 19.Nc3 c6 20.Ne4 (better is 20.Na2–/+) 20...Bc7 (better is 20...Bb4 21.Ke2 f5–/+) 21.Ke2+= 0–0 (21...f5 22.Ng3+=) 22.Ra1 (22.Rc1!? Nb8 23.d4+/–) 22...f5 23.Nc5 Nc5 24.bc5 Bd8? (24...e4 25.Ra6+=) 25.Bc3 (25.Ra6 Re8+–) 25...Be7 (25...Bf6!?+=) 26.Be5+/– Bc5 27.Ra6 (27.Rc1 Be7 28.Rc6 Kf7+/–) 27...Re8 (27...Rc8 28.d4 Bf8 29.Rb6+=) 28.f4 (28.d4 Re6+/–) 28...g5 (better is 28...Rc8!?+=) 29.Rc6+– gf4?? (29...Ba7+–) 30.ef4 (better is 30.Rc5 fe3 31.Ke3+– (< 31.Rb5 ed2 32.Kd2 Ra8+–)) 30...Bd4+= 31.Kf3 Be5 32.fe5 Re5 33.Rc8 Kg7 34.Rb8 Rd5 35.d4 Kg6 (35...Rd4!? 36.Rb5 Kg6=) 36.Rb6 Kg5 37.g3 (37.Ke3!?+=) 37...h5?? (better is 37...Rd4 38.h4 Kh5 39.Rb5 Kg6=) 38.h4 1–0. slavisa11 – TheGuy, Live Game Caissa's Web, 2004.

4.Bb5 a6? 5.Bc6+– dc6 6.Be5 Bd6?? (better is 6...Nf6+–) 7.Bg7 (7.Bg7 Qg5 8.Bh8 Qg2 9.Qf3+–) 1–0. Schellen,Anton – Jankovic,Mladen, FICGS, 2006.

4.Bb5 Nb4 5.a3 Nd5 6.Be5 c6 7.Bc4 Ngf6 8.Nc3 Bb7 (better is 8...Nc3!? 9.Bc3 d5+=) 9.Nd5 cd5 10.Bb3 Be7 11.d4 d6 12.Bf6 Bf6 13.Rb1 0–0 14.Nf3 Rb8 15.0–0 Qa5 16.c4 (better is 16.Qd2!? Bd8 17.Qb4+/–) 16...dc4+= 17.Bc4 Qa3 18.Be2 Qc3 19.Rb3 Qc6 20.Qb1 a5 21.Rc1 Qd5? (better is 21...Qd7!?+=) 22.Rb5 Qe4 23.Qe4 Be4 24.Ra5 d5 25.g3 (25...Rfc8 26.Rc8 Rc8 27.Nd2+/–) 1–0. slavisa99 – TheGuy3, Live Game Caissa's Web, 2004.

4.Bb5 Bb7!? 5.a3 Nb4+=.

3.Be5 Bb4??

4.Bg7+– Bb7 5.Bh8 Qg5 6.e3 Bg2 (6...Ne7 7.Nf3 Qg8 8.Be5+–) 7.Nf3 Qg6 (7...Bf3 8.Qf3 Nc6+–) 8.Rg1 Bf3 9.Rg6 Bd1 10.Rg8 (10.Kd1?! hg6 11.Nc3 Bc3 12.Bc3 b4 13.Bb4 Nc6+–) 10...Ke7 11.Kd1 1–0. guestpozf – guestcynt, private online chess game, 2018.

4.Bg7+– d6 5.a3 Ba5 6.e3 Bf5 (6...c6 7.Bh8 Be6 8.a4+–) 7.Bb5 c6 8.Bc4 (better is 8.Bh8 cb5 9.Qf3 a6 10.Qf5 Ne7 11.Qh7 Nbc6+–) 8...f6 (8...Qg5 9.Bh8 Qg2 10.Qf3 Qf3 11.Nf3 Bc2 12.Rg1+–) 9.Bh8 Qe7 (9...d5 10.Bd3 Bd3 11.cd3+–) 10.Bg8 (10.Qh5 Bg6 11.Qa5 d5+–) 10...Qe5 (10...Bb6 11.Bb3+–) 11.c3 Be4 (11...Nd7 12.Nf3 Qe4 13.Qb3+–) 12.Qb3 (12.Nf3 Qb5 13.a4 Qd3+–) 12...Nd7 (12...Qe7 13.f3 Bf5 14.Bf6 Qf6 15.Qb7 Bb1 16.Qa8+–) 13.f3 (13.Qf7 Kd8 14.Bh7 Bd5+–) 13...Bd5 (13...Bg6 14.f4 Qe7 15.Qa4+–) 14.Bd5 cd5 15.Ne2 (15.Qb7 Rd8 16.Qa7 d4+–) 15…Kf7 (16.Qb7 Rh8 17.Qa7 Rd8 18.Qa5 Rb8+–). wlittle (2295) – danelson, net–chess.com, 2004.

4.Bg7+– Bf8 5.Bh8 Nh6 (5...Bb7 6.Nf3+–) 6.e3 d5 (6...Bb7 7.Nf3 a6 8.Bd3+–) 7.Bb5 Qd7 (7...c6 8.Bd3 Bf5+–) 8.Bd7 Kd7 9.Nc3 Na6 10.Nd5 Nc5 11.Nf6 Ke7 12.d4 Na4 13.Qf3 Be6 14.Qa8 (14...Nf5 15.Qe8 Kd6 16.Qf8 Ne7 17.Qd8 Kc6 18.Qe7+–) 1–0. Taulien,Hans_Juergen – Boeer,Marko, remoteschach.de, 2002.

3.Be5 Nc6

4.Bb2 Bb4 5.Bg7 Be7 6.Bh8 Bf6 7.Bf6 Qf6 8.c3 b4 (8...a6 9.d4+–) 9.Qc2 (9.d4 Ba6+–) 9...d5 (9...Qg6 10.Qg6 hg6 11.e3+–) 10.e3 (10.Qh7!? Nge7 11.Nf3 d4+–) 10...Bf5 11.d3 Na5 (11...bc3 12.Nc3 d4 13.Nd5+–) 12.Nf3 Nc4 (12...c5 13.e4 Bg4 14.Qa4 Nc6 15.Ne5+–) 13.Nd4 Bg6 (13...Na3 14.Qb3 Ne7 15.cb4 Nb1 16.Rb1+–) 14.Be2 (14.Qa4!? Kf8 15.dc4 c5+–) 14...a5 (14...c6 15.cb4 a5 16.ba5 Na5 17.Nd2+–) 15.0–0 (better 15.Qa4!? Kf8 16.dc4 c5+–) 15...a4 (15...c6 16.Qb3 Ne5 17.cb4+–) 16.e4 (16.cb4 Qa6+–) 16...de4 (16...Nb6 17.f4 bc3 18.e5+–) 17.dc4 e3 (17...c5 18.Nb5 Kf8 19.Qd2+–) 18.Qd1 bc3 (18...c5 19.Nb5 Kf8 20.Qd5+–) 19.Nc3 0–0–0 (19...Ne7 20.fe3 Qe5 21.Qd2+–) 20.fe3 Qb6 21.Nd5 (21.Bg4 Kb7 22.Na4 Rd4 23.ed4 Qb4+–) 21...Qc5 22.Qa4 Ne7 23.Ne7 (23.Qa8 Kd7 24.Nf6 Kd6 25.Qd8 Ke5 26.Ng4 Ke4 27.Rf4) 23...Qe7 24.Nc6 (24.Bg4 f5 25.Qa6 Kd7 26.Qc6 Kc8 27.Rf5 Qe3 28.Rf2 Bf5 29.Bf5 Kb8 30.Rb1 Qb3 31.Rb3 Ka7 32.Qb7) 24...Qe3 25.Rf2 (better 25.Kh1 Rd6 26.Rae1 f5+–) 25...Rd6 26.c5! Rf6 (26...Qc5 27.Qa8 Combination) 27.Bg4 (27.Qa8 Kd7 28.Rd1 Qd4 29.Bg4 Rf5 30.Rd4 Ke6 31.Qd8 h6 32.Re2) 27...Bf5 (27...Rf5 28.Qa8 Kd7 29.Rd1 Ke6 30.Qd8 Qf2 31.Kh1 Qf1 32.Rf1 f6 33.Re1 Kf7 34.Re7) 28.Qa6 (28.Qa8 Kd7 29.Rd1 Rd6 30.Bf5 Qe6 31.Be6 fe6 32.Rf7) 28...Kd7 29.Rd1 Ke6 (29...Rd6 30.Bf5 Qe6 31.Be6 fe6 32.Rd6 cd6 33.Qb7 Ke8 34.Qe7) 30.Qc8 1–0. e4_e5_f4 (1695) – Eloycardenas (1680), lichess.org, 2020.

4.Bb2 Bb4 5.Bg7 f6 6.e3 d5 (6...Qe7 7.Bh8 Rb8 8.c3+–) 7.Bb5 (7.Qh5 Ke7 8.Bb5 Na5+–) 7...Kf7 (7...Qd7 8.Bh8 Bb7 9.a3+–) 8.Bh8 Nge7 9.Qh5 Ke6 10.Qh7 Bd7 (10...Rb8 11.c4 Bb7 12.Qh3 Kf7+–) 11.e4 (better 11.Bg7 Rb8 12.Be2+–) 11...Qh8 12.ed5 Nd5 13.Qe4 (better 13.Qd3+–) 13...Ne5 (13...Kd6 14.Qd3 Re8 15.Kd1 Qh5 16.Kc1 Re1 17.Kb2 Qd1 18.Bc6 Bc6+–) 14.Bd7 Kd7 (14...Kd6 15.c4 Nf4 16.Bf5 Nfd3 17.Ke2+–) 15.Qd5 Bd6 16.Nc3 Re8 (16...Qg8 17.Nge2+–) 17.Ne4 (17.Nge2 Qg8+–) 17...f5 18.Nc5 Ke7 (18...Kd8 19.Kf1 Qh4+–) 19.Ne2 (better 19.Kf1 Qg8 20.Qg8 Rg8 21.Re1+–) 19...Nf3 20.gf3 (better 20.Kd1 Qa1 21.Nc1+–) 20...Qa1=+ 21.Nc1 Qc1 22.Ke2 Kd8 (22...Qh1? 23.Qe6 Kf8 24.Nd7 Kg7 25.Qe8 Qh2 26.d4+–) 23.Kd3?? (better 23.Ne6 Re6 24.Qe6 Qh1 25.Qf6 Ke8 26.Qe6 Kd8 27.Qf6 Ke8 28.Qe6 Kd8=) 23...Qa3?? (better 23...Qh1 24.Nb7 Ke7 25.Nd6 cd6 26.Qf5 Qf1 27.Kc3 Qa1 28.Kd3 Qa2 29.Qg5 Kd7 30.Qb5 Kd8–+) 24.Nb3+– Qa6 25.c4 (25.Kc3 Re5 26.Qa8 Kd7+–) 25...Re5 26.Qa8 Kd7 (26...Ke7 27.Qg8 Qa2 28.Qb8+–) 27.Rg1 Rd5?? (27...Qa2 28.Qb7 Qa4+–) 28.Qd5 (28.Qd5 Qa5 29.Rg7 Kc8 30.Qa8) 1–0. DEFFM – GuestVHLZ, freechess.org, 2016.

4.Bb2 Nb4 5.a3 Nc6 6.e3 d5? (better 6...a6!?=) 7.Bb5+– Bb7 (7...Bd7 8.Nc3+–) 8.Nf3 a6 9.Ba4 Nf6 10.Ne5 Ne4?? (better 10...Qd6+–) 11.Bc6 (11.Nc6?! Qd7+–) 11...Bc6 12.Nc6 Qd6 13.Nb4 c5 14.Nd3 Rb8 (14...c4 15.Nf4+–) 15.Be5 Qb6 16.Bb8 Qb8 17.Nc3 c4 18.Ne4 (18.Nf4!? Nc3 19.dc3 Bd6+–) 18...de4 19.Nf4 Bd6 20.Rb1 Qc7 (20...Qc8 21.f3+–) 21.Qg4 (21.Nd5 Qd7 22.d3 0–0+–) 21...0–0 22.Nd5 Qc5 (22...f5 23.Nc7 fg4 24.Na6 Ba3 25.Nc7+–) 23.Nf6 Kh8 24.Ne4 Qa3 25.Nd6 Qd6 26.Qe2 (better 26.Qc4!? f5+–) 26...Qg6 27.0–0 Qc2 28.Rfc1 Qd3 29.Qd3 cd3 1–0. GuestHJQM – GuestCTGX, freechess.org, 2017.

4.Bb2 Nb4 5.a3 Nd5 6.e3 a6 7.Nf3 Ngf6 8.c4 bc4 9.Bc4 Nb6 10.Be2 Be7 11.0–0 0–0 12.Nc3 Bb7 13.d4 d6 14.Rb1 c6 15.e4 Rb8 16.Re1 Re8 17.Qd2 Qd7 18.d5 (18.Bc1!? Qc7 19.Qf4+=) 18...cd5= 19.ed5 Nbd5 20.Nd5 Bd5 21.Ba6 Bf3 22.gf3 Qf5 23.Qd3 Qg5 24.Kh1 h6 25.Rg1 Qf4 26.Qe3 Qh4 27.Bd3 (better is 27.Bb5!+/–) 27...d5=+ 28.Qa7?? (better is 28.Qd4 Qd4 29.Bd4 Rb1 30.Bb1=+) 28...Bd6–+ 29.f4 Qf4 30.Rg2 (30.Rg3 Rb2! 31.Rb2 Qc1 32.Kg2 Qb2–+) 30...Rb2! 31.Rb2 (31.Rf1 Rb3 32.Rfg1 Rd3 33.Rf1–+) 31...Re1 (32.Bf1 Rf1 33.Rg1 Qh2) 0–1. mast (1910) – Hossa (2125), ICS Rated blitz match, 1998.

4.Bb2 f5 5.e3 Nf6 6.a3 d5 (better 6...a6!?+–) 7.Bb5+– Bd7 8.Nf3 (8.Qf3 a5 9.c4 ab4 10.cd5 Nb8 11.Bd7 Qd7 12.Bf6 gf6+–) 8...Be7 (8...Bd6 9.0–0+–) 9.0–0 (9.c4 a6 10.Bc6 Bc6+–) 9...0–0 (9...a5 10.ba5 Na5 11.Be2+–) 10.Bc6 (10.c4 Nb8+–) 10...Bc6 11.Ne5 Qe8 12.Nc6 Qc6 13.Nc3 Bd6 14.Ne2 Rad8 15.Bd4 a6 16.c3 Qe8 17.Ng3 Qg6 18.Qf3 Ne4 Black prepares the advance f4 19.Rad1 (better 19.d3!? Nd2 20.Qd5 Kh8+–) 19...f4+– 20.ef4 Rf4 (20...Bf4!? 21.Qe2 Ng3 22.hg3 Rfe8+–) 21.Qh5+– Qe6 (21...Qh5 22.Nh5 Rh4 23.Ng3+– (23.Ng7 Bh2 24.Kh1 Be5 25.Kg1 Bd4 26.cd4 Kg7–/+)) 22.Ne4 (22.Bg7 Re8 23.Bd4 Be5+–) 22...Re4 (22...Qe4 23.Qg5 Rd7 24.Rfe1+–) 23.Qg5 (better 23.Bg7 Qg6 24.Qg6 hg6 25.Bd4+–) 23...Be5?? (better 23...Rd7+–) 24.Qd8 Kf7 25.Be5 Re5 (25...Qe5 26.Qc8+–) 26.Qc7 Kg8 27.d4 Rg5 (27...Re2+–) 28.Qd8 (28.Qd8 Kf7 29.Qg5+–) 1–0. Abdullaevich (1820) – fatbeagles, lichess.org, 2020.

4.Bc3 Bb4 5.a3 Bc3+= 6.Nc3 a6 7.e4 Nf6 8.h3 0–0 9.Nf3 d6 10.Be2 Bb7 11.0–0 Re8 12.d3 Ne5 13.d4 (13.Rb1!?+=) 13...Ng6 14.Bd3 d5 (better is 14...c5!?–/+) 15.e5= Nd7 (15...Ne4 16.Qe1 c5 17.Ne4 de4 18.Be4 Be4 19.Qe4 cd4 20.Rfd1=) 16.Re1 Nf4 17.h4 c5 18.Kh2? (better is 18.Bf5=) 18...cd4–+ (18...Nd3?! 19.Qd3 cd4 20.Ng5–/+) 19.Nd4? (better is 19.Na2!?–+) 19...Qh4 20.Kg1 Ng2?? (better is 20...Ne5 21.g3 Qg5–+) 21.Kg2+= Qd4?? 22.Qd2 Qg4 23.Kf1 d4 24.Ne4 Qh3 25.Ke2 Ne5 26.Qf4 Nc4 27.Rh1 Qe6 28.Kf3 Be4 29.Be4 Ne5 30.Kg3 Ng6 31.Bg6 Qg6 32.Kf3 Qc2 33.Qd4 Qf5 34.Kg2 Rad8 35.Qb2 Qg4 36.Kf1 Re2 37.Qe2+– Qe2 38.Ke2 g6 39.Rhd1 Re8 40.Kf1 h5 41.Re1 Rd8 42.Rad1 (42.Rad1 Rc8 43.Rd6+–) 1–0. gordiemac – Dazzer, ChessWorld.net, 2011.

4.Bc3 Bb4?? 5.Bg7 Bc5 6.Bh8 d6 7.e3 Bb7 (7...a6 8.d4 Bb6 9.Bd3+–) 8.d4 Bb6 9.Bb5 Qg5 (9...a6 10.Ba4 Ba5 11.c3+–) 10.d5 (10...Qg2 11.Qf3 Qf3 12.Nf3+–) 1–0. Fiedler,Peter – Neffgen,Dieter, T0076 DESC, 2003.

4.Bc3 Nb4 5.Bb4 Bb4 6.e3 a6 7.c3 (7.a4 Bb7=) 7...Bd6 8.Qf3 Rb8 9.c4 (9.a4!?=+) 9...Bb7–/+ 10.Qg4 Qf6 11.Nc3? (better is 11.d4 Bb4 12.Nd2 Bd2 13.Kd2 Qf2 14.Ne2–+) 11...b4 12.Rc1 bc3 13.dc3 (13.Rc3 Nh6 14.Qd1 c5–+) 13...Ba3 14.Rc2 Bc6 15.Nf3 Rb1 16.Ke2 Ba4 (better is 16...Ne7!? 17.Nd4 Bb7 18.f3–+) 17.Rd2 Ne7 18.Qe4 Qc3 (better is 18...Rb8 19.Qe5 Qe5 20.Ne5 Bc1–+) 19.Qb1 Qc4 20.Ke1 Bb4?? (better is 20...Qb4 21.Qb4 Bb4 22.Ba6 Bc6+=) 21.Bc4+– d5 22.Qb4 dc4 23.Qa4 c6+– 24.Qc4 (24.Qb4!? 0–0 25.Qe7 h6+–) 24...0–0 25.Ng5 Nd5 26.Qh4 (better is 26.Qc6 Nf6+–) 26...h6 27.f4 (better is 27.Nf3 Rb8+–) 27...hg5 28.fg5 Ne3 29.Ke2 Nf5 30.Qf4 (30.Qe4 g6 31.Qc6 a5+–) 30...g6 31.Kf2 (31.Rc1 Re8 32.Kf2 c5+–) 31...a5 32.h4 c5 33.h5 c4 34.h6 Kh7 35.Qe5 a4 36.g4 f6 37.gf5 37...fe5+– 38.Kg3 Rf5 39.Rf2 (39...Rg5 40.Kf3 Rf5 41.Ke3+–; 39.Rd7 Kg8 40.h7 Kh8 41.Rd8 Kg7 42.h8Q Kf7 43.Rh7 Ke6 44.Qe8) 1–0. slavisa11 – TheGuy, Live Game Caissa's Web, 2004.

3.Be5 d6

4.Bb2+/– a5 5.a4 ab4 6.ab5 Ra1 7.Ba1 Nf6+/–.

4.Bb2 Nc6 5.c3 (5.e4 a6 6.a4 ba4 7.Ra4 Rb8+/–) 5...Bg4 (5...Ne5 6.Na3+/–) 6.f3 (better is 6.Qc2+/–) 6...Bf5? (better is 6...Be6!?+=) 7.e4+– Be6 (7...Bd7 8.Bb5 Qg5 9.Qe2+–) 8.a4 1–0. deepattack – miriaml, net–chess.com, 2003.

4.Bb2 Be6 5.e3 a6 6.Nf3 Nc6 7.Be2 (better is 7.a4 Nb4 8.c3+/–) 7...g6?? (better is 7...Nb4 8.a4 ba4 9.Ra4 a5+=) 8.Bh8+– f6 (8...Nb4 9.a4 c6 10.Nd4+–) 9.0–0 (9.a4!? Nb4 10.c3 Nc6 11.ab5 ab5 12.Ra8 Qa8 13.Bb5 d5+–) 9...Nh6 10.d3 (10.a4 ba4 11.b5 ab5 12.Bb5 Bd7+–) 10...Nb4 (10...Nf7 11.d4 d5 12.Bf6 Qf6 13.a4+–) 11.a3 (11.Nd4 Bg8 12.Bf3 d5+–) 11...c5 (11...Nc6 12.Qd2 Be7 13.d4+–) 12.Nbd2 (better is 12.ab4 Nf7+–) 12...Qd7 (12...Nd5 13.Ne4 Be7+–) 13.Bf6 (better is 13.ab4!? Be7 14.bc5 Kf7 15.cd6 Qd6+–) 13...Ng4 14.Bb2 0–0–0 (14...Nd5+–) 15.ab4 cb4 16.Ra6 d5 17.Ne5 Qb7 18.Rc6 Kb8 19.Re6 d4 20.Nc6 Kc7 21.Nd8 Kd8 22.Bg4 h5 23.Bf3 Qd7 24.Re4 (24.Re4 Qa7 25.Rd4 Kc7 26.Rf4+–) 1–0. Valpa – Dc, playchess.de, 2005.

4.Bb2+/– Be7?? 5.Bg7+– Bf6 6.Bh8 Bh8 7.c3 c6 8.a4 Bf6 9.ab5 cb5 10.Qc2 Bb7 11.Qh7 Ke7 12.Nf3 Nc6 13.Ra2 Ne5 14.Ne5 Be5 15.d4 Bf6 16.e4 Qc7 17.Bb5 a6 18.Bd3 a5 19.ba5 Qd7 20.a6 Bc6 21.0–0 Qe6 22.Ra3 d5 23.e5 Bg5 24.Bf5 Nf6 25.ef6 Qf6 26.Re1 Kf8 27.Bd3 Bd7 28.Ra5 Bc8 29.Rd5 Be6 30.Rg5! Qg5 31.Qh8 Qg8 32.Qh6 Qg7 33.Qg7 Kg7 34.f4 Bc8 35.Nd2 Ra7 36.Ra1 f6 37.Ne4 Bf5 38.Nc5 Bd3 39.Nd3 Kg6 40.g4 Kf7 41.Kf2 Ke6 42.c4 Kd6 43.g5 fg5 44.fg5 Rf7 45.Kg3 Rc7 46.a7 Ra7 47.Ra7 (47.Ra7 Kc6 48.Ra6 Kd7 49.g6 Ke7 50.Ra7 Ke6 51.g7 Kf5 52.Nc5 Kf6 53.g8Q Kf5 54.Rf7) 1–0. Otto,Norbert – Newton,Daryl, ZN–2011–0–01715, 2011.

4.Bb2 Nf6 5.e3 Bb7 (5...a5!?+/–) 6.Bb5+– Nc6 7.Bf6 Qf6 8.Nc3 g6 9.Nge2 Bg7 10.Nd4 Kd7?? (10...d5+–) 11.Qg4 Ke7 (11...Ke8 12.Qe4 Kf8 13.Bc6 Bc6 14.Qc6 Qd8+–) 12.Nd5 (12.Nd5 Kf8 13.Nf6 Bf6 14.Qf3 Bd4 15.ed4+–) 1–0. Fritz11 – jumbo, casual, 2013.

2.Bb2 f6

3.a3 a6 4.f3 Bb7 5.Nh3 e5 6.Nc3 Ne7 7.d3 (7.e4 d5=) 7...Nd5 (7...d5 8.e4=+) 8.Qd2 (8.Nd5 Bd5 9.d4 e4=) 8...Nc3=+ 9.Qc3 d6 (9...a5 10.ba5 Nc6 11.e3=+) 10.e4 c5 11.Be2 (11.bc5 dc5 12.Be2 Bc8=+) 11...cb4 (11...d5 12.Qb3=+) 12.ab4= Nc6 13.Qb3 Nd4 (13...d5!? 14.c3 d4=+) 14.Bd4+= ed4 15.0–0 (15.Nf4 d5 16.Ne6 Qd6+=) 15...Be7 (15...d5!?=) 16.Nf4+= g5 (better 16...d5!? 17.Ne6 Qd6 18.Ng7 Kf7+=) 17.Ne6+– Qc7?? (better 17...Qb6+–) 18.Nc7 (18.Nc7 Kd7 19.Qe6 Kc7 20.Qe7 Kc6 21.Qf6+–) 1–0. alt20 – Bsd, lichess.org, 2015.

3.a4 g6 4.ab5+– Bg7 (4...e5 5.Bc3+–) 5.c4 (5.e4 Bb7 6.Nc3 e6+–) 5...d6 (5...Bb7 6.d4+–) 6.e3 e6 (6...Bb7 7.d4+–) 7.h4 (7.Qf3 d5+–) 7...a6 (7...Bb7 8.h5+–) 8.Qf3+– h5?? (better 8...d5+–) 9.Qa8 Nd7 (9...Bd7 10.ba6 Bc6 11.Qa7+–) 10.ba6 Nb6 11.Qb8 Ne7 (11...Bd7 12.Qd8 Kd8 13.d4+–) 12.a7 0–0 (12...Nc6 13.Qb6! cb6 14.a8Q+–) 13.c5 Bb7 (13...dc5 14.bc5 Nd7 15.Qb5+–) 14.Qb7 Qc8 15.Qc8 Rc8 (15...Nbc8?? 16.a8Q Nd5 17.Qb7 dc5 18.bc5+–) 16.cb6 cb6 17.a8Q Ra8 18.Ra8 Kh7 19.Re8 Nc6 20.Re6 Nb4 21.Rd6 b5 22.Bb5 Na2 23.Bc4 Nb4 24.Rb6 f5 25.Rb7 Nc6 (25...f4 26.Rg7 Kh6 27.Bg8 Nc2 28.Kd1 Ne3 29.de3 fe3 30.Rh7) 26.Rg7 Kh6 27.Bg8 Nd8 (27...Nd4 28.Rh7) 28.Rh7 1–0. pcmvr – samantho, net–chess.com, 2018.

3.d4 Nc6 4.e3 (4.c3 a5+=) 4...Nb4 5.a3 Nd5?? (better is 5...Na6+=) 6.Qh5+– g6 7.Qd5 c6 8.Qb3 a5 9.Nf3 a4 10.Qc3 (10...Bg7 11.Nbd2+–) 1–0. Wall,Bill – Udine, internet, 2003.

3.d4 e5 4.e3=.

3.e3 Ba6 4.Bb5!+/– Bb5 5.Qh5 g6 6.Qb5 Nc6 7.a3 e5 (7...a5+/–) 8.Nc3 (8.Qd3 Rb8+/–) 8...Bd6? (better is 8...a5!?=) 9.Qd3+/– Nge7 10.Nb5 0–0 11.Nd6 cd6 12.Qd6 Nf5 13.Qd3 Nh4?? (better is 13...Rb8+–) 14.Qc4 Kg7 15.Qh4 a5 16.ba5 Na5 17.Bc3 Nc6 18.Nf3 f5 (18...d5 19.0–0+–) 19.Qd8 Rad8 20.Ne5 Kg8 21.Nc6 dc6 22.Rb1 (22.a4 Ra8+–) 22...c5 (22...Ra8 23.Rb3+–) 23.Rb7 Rf7 24.Rf7 Kf7 25.0–0 (25.a4 g5+–) 25...c4 (25...Ra8 26.Bb2+–) 26.Rb1 Ke6 27.f4 h6 28.Rb6 Rd6 29.Rd6 Kd6 30.a4 Kc5 31.a5 Kb5 (31...Kc6 32.d3+–) 32.d3 cd3 33.cd3 g5 (33...Kc5 34.e4 fe4 35.de4+–) 34.d4 (better is 34.g4 gf4 35.gf5 fe3+–) 34...gf4 35.ef4 Ka6 36.d5 Kb7 37.d6 Kc6 1–0. Duke of Wellington – edog13, ChessWorld.net, 2015.

3.e3 d6? 4.Bb5+– c6 5.Be2 Ba6 (5...Nd7 6.a4+–) 6.c4 Qb6 7.Qa4 e5 (7...Bb7 8.Nc3+–) 8.Nc3 Ne7 9.Rb1 Nd7 (9...Bb7+–) 10.c5 dc5 11.Ba6 (worse is 11.Qa6 cb4 12.Ne4 Nd5+–) 11...Qb4 (11...cb4 12.Ne4 Ng6 13.Rc1+–) 12.Qd1 Nb8 (12...Rb8 13.Ba1 Qa3 14.Rb8 Nb8 15.Bc4+–) 13.a3 Qb6 14.Bc4 Nd7 15.Nh3 (15.Nf3 Rb8+–) 15...h6 (15...Nf5 16.Be6 Nd6 17.f4+–) 16.0–0 Qc7 17.f4 f5 (17...Rb8 18.Be6+–) 18.e4 g6 (18...Kd8 19.Na4 Ng6 20.ef5 Nf4 21.Nf4 ef4 22.d4+–) 19.ef5 gf5 (19...Nf5 20.Qg4 Kd8 21.Qg6+–) 20.Qh5 Kd8 21.fe5 Ne5 (21...Bg7 22.Nf4 Nf8 23.Na4 Be5 24.Nc5+–) 22.Nf4 Kd7 23.Be6 Kd6 24.Ne4! fe4 (24...fe4 25.Qe5 25.Qe5 1–0. marekt – zippy1970, chessworld.net, 2015.

3.e4 a6 4.c4 e5 5.a3 d6 (5...a5!?+=) 6.cb5+– Bd7 (6...ab5 7.Bb5 c6 8.Be2+–) 7.ba6+– Na6 8.Bc4 1–0. Johansson,Ragnar – Gradin,O, corr SSKK Veteran–SM, 1985.

3.e4 c6 4.Nf3 e5 5.a3 a5 6.Be2 a4 (better is 6...ab4!? 7.ab4 Ra1 8.Ba1 d5 9.ed5 Qd5+=) 7.0–0 g5 (7...d5 8.ed5 e4 9.Ne1 Qd5 10.d3+/–) 8.d3 (8.d4 d6+–) 8...d6 9.Nfd2 g4 (9...Qb6!?+/–) 10.Bg4+– Nh6 11.Bc8 Qc8 12.Nc3 Rg8 13.g3 Be7 14.Qh5 Rg6 15.Nf3 Bf8 (15...f5 16.Bc1 f4 17.d4+/–) 16.Nh4 Qg4 17.Qg4 Rg4 18.f3 Rg5 19.Ne2 Ra7 20.f4 Rh5 21.fe5 (better is 21.c4+–) 21...de5? (21...fe5 22.c4 bc4 23.dc4+/–) 22.Bc1 (22.Rf6 Bg7 23.Rf3 Rc7+–) 22...Ng8 (better is 22...Be7+–) 23.Nf5 Kf7 24.Kg2 Ke6 25.h3 Bh6 26.g4 Rf5 27.gf5 Kd6 28.Rg1 Bc1 29.Rac1 Rg7 30.Kh2 Rg1 31.Rg1 Ne7 32.Rg7 h6 33.Rh7 Na6 34.Rh6 Ng8 35.Rg6 Ne7 36.Rf6 Kd7 37.Rf7 Ke8 38.Rg7 Kf8 39.f6 Ng8 40.Rc7 Nc7–/+ 41.Kg3 Nf6 42.Kh4 c5 43.Kg5 Kg7 44.h4?? cb4–+ 45.ab4 Na6 46.c3–/+ a3 47.Nc1 Nd7 48.h5 Kh7 49.Na2–/+ Nc7 50.Nc1 Ne6–+ 51.Kh4 Nf4 52.Kg5 Nd3! 53.Nb3 Nf2 0–1. Valpa – Thrustnicely, playchess.de, 2005.

3.e4 d5? 4.ed5 (4.Qh5!? g6 5.Qd5 c6 6.Qd8 Kd8+–) 4...Qd5 5.a3 (5.Nc3 Qe6 6.Be2 c6+/–) 5...Qe4+= 6.Ne2 Bh3? (better is 6...e5+=) 7.Nbc3+– Bg2?? (better is 7...Qb7 8.Nf4 Bf5 9.Bb5 c6+–) 8.Ne4 Bh1 9.f3 (better is 9.N2g3 Be4 10.Bb5 c6 11.Ne4 e5+–) 9...Bf3 10.Bd4 (better is 10.Nc5!? e5 11.Ne6 Bd6 12.Ng7 Kd8+–) 10...Nc6? (better is 10...e5 11.Be3 Be4+–) 11.Be3 Rd8 12.N4g3 e6 13.c3 Bd6 14.Qc2 g6 15.Nf4 Bf4 16.Bf4 e5 17.Be3 Nge7 18.Be2 Be2 19.Ke2 0–0 20.a4 Rd7 21.Qb3 Kh8 22.ab5 Nb8 23.Bh6 Rfd8 24.Qf7 (24...Nf5 25.Qf6 Ng7 26.Bg7 Kg8 27.Bh6 Rd2 28.Bd2 Rd6 29.Qe7 Rd2 30.Kd2 h5 31.Nh5 gh5 32.Rg1 Kh8 33.Qg7) 1–0. aliwood – LAME WOLF, internet, 2005.

3.e4 e5 (--> 1.b4 e5 2.Bb2 f6 3.e4 b5).

3.e4 g6 4.Bb5+/– c6 5.Bc4 e6 6.Nf3 (6.a3 d5 7.ed5 ed5+/–) 6...Ba6 (6...d5 7.ed5 ed5 8.Bd3+=) 7.d3 (better is 7.Ba6 Na6 8.a3+–) 7...Bc4= 8.dc4 c5? (better is 8...Bb4 9.Nbd2 d6=) 9.b5+– d6 10.0–0 a6 11.Nc3 a5 12.a4 Nh6 13.Ne2 e5 14.Nc3 Bg7 15.Nd5 0–0 16.Qd3 Nd7 17.Rfd1 Ng4 18.h3 Nf2? 19.Kf2 Bh6 20.Bc1 Bc1 21.Rac1 Nb6 22.Nb6 Qb6 23.Qd6 Rab8 24.Qb6 Rb6 25.Rd7 h6 26.Rc7 g5 27.Rc5 Rd8 28.Rc7 h5 29.c5 Re6 30.Ra7 g4 31.Nh4 g3 32.Kg3 Rd4 33.c6 Re4 34.c7 Re3 35.Kf2 Re4 36.c8R (36.c8R Re8 37.Re8#; 36.c8Q Re8 37.Qe8 1–0. Pscheidl,Udo (1770) – Witt,Monika, RSS5E NoEngine–134, 2011.

3.Nf3 e5 4.a3 d5 5.d3 d4 6.Nbd2 Bd6 7.g3 Ne7 8.c3 0–0 9.c4 bc4 10.dc4 c6 11.Bg2 Ng6 12.Qb3 Be6 13.Qc2 Kh8 14.0–0 a6 15.Ne4 Be7 16.c5 Bg8 17.Ned2 Bd5 18.Nc4 e4 19.Ne1 d3 20.ed3 ed3 21.Qd3 Bg2 22.Qd8 Rd8 23.Kg2 Nd7 24.Nf3 Nde5 25.Nb6 Rab8 26.Ne5 fe5 27.Rfe1 Bf6 28.Rad1 Rd1 29.Rd1 Re8 30.Rd7 e4 31.Bf6 gf6 32.Rc7 Ne5 33.Ra7 f5 34.Ra6 Rd8 35.Ra8 Ra8 36.Na8 Kg7 37.Nc7 Kf6 38.a4 Nd3 39.b5 cb5 40.ab5 Nc5 41.b6 Ke7 42.Nd5 Ke6 43.Nc7 Kd7 44.Kh3 Kc6 45.Ne8 Kb6 46.Nf6 h6 47.Kh4 Kc6 48.Kh5 Kd6 49.Kh6 Ke6 50.Ne8 Nd3 51.Ng7 Kf6 52.Nh5 Ke5 53.Kg6 Nf2 54.h3 e3 55.Nf4 Nh3 56.Kh5 Nf4 57.gf4 Kf4 58.Kg6 e2 0–1. giorgo – lifi50, playok.com, 2012.

3.a4 ba4

4.e3 Bb7 5.Ra4 e5 6.Nc3+=.

4.e3 e5 5.Ra4 c6 (5...Bb7 6.d4 ed4 7.Bd4+=) 6.d4 e4 (6...d6 7.Bd3+=) 7.d5+– c5 (7...Qb6!? 8.d6 Ba6+–) 8.bc5+– f5 (8...Bc5 9.Re4 Kf7 10.Nc3+–) 9.Nc3 Bc5? (9...Nf6 10.Nb5 Kf7 11.Bf6 Kf6+–) 10.Ne4! Nf6 (10...fe4 11.Rc4 Double attack (11.Rc4 Decoy)) 11.Nf6 (11.Bf6 gf6 12.Qh5 Kf8 13.Nc5 d6 14.Ne6 Be6 15.de6 Qe8 16.Qf5 Qa4 17.Qf6 Ke8 18.Qh8 Ke7 19.Qh7 Ke6 20.Bc4 d5 21.Qe4 Kd7 22.Qd5 Kc8 23.Qa8 Qc4 24.Qa7 Qc2+–) 11...gf6 12.Qh5 Kf8 13.Qh6 Kf7 14.d6! a5 (14...Bd6 15.Bc4 Mate attack) 15.Bc4 Ke8 16.Qh5 Kf8 17.Qf7 1–0. pcmvr – valerypavlovich, net–chess.com, 2017.

4.e3 h5 5.Be2+– g6 6.Bd3 c6?? (better 6...Kf7+–) 7.Bg6 1–0. pcmvr – valerypavlovich, net–chess.com, 2018.

3.a4 c6

4.ab5 cb5 5.Nc3 a6 6.Nb5 d6 (6...e5!?+=) 7.Nc3 (7.e4 Nc6 8.Nd4 Nd4 9.Bd4 e5+–) 7...Bf5 (7...Qb6!?+–) 8.e4+– Bg6 (8...Bd7 9.Bc4 Nc6 10.b5 ab5 11.Ra8 Qa8 12.Bb5+–) 9.Bb5! Nd7 (9...ab5 10.Ra8 Pinning (10.Ra8 Deflection)) 10.Bc6 Ra7 (10...Rb8 11.Ra6 Kf7+–) 11.Nb5! Qb8 (11...ab5 12.Bd7 Double attack (12.Ra7 Pinning; 12.Ra7 Deflection)) 12.Na7 Qa7 13.Qg4 h5 (13...f5 14.ef5 Qb6 15.Bd7 Kd7 16.Bg7 Nh6 17.Bh6 Bf7 18.Bf8 Rf8+–) 14.Qg6 Kd8 15.Bc3 Rh6 (15...e6 16.b5 Ke7 17.Ra6+–) 16.Qf7 Rh8 17.b5 Nh6 18.Ba5 Kc8 19.Qe8 1–0. pcmvr – valerypavlovich (2125), net–chess.com, 2014.

4.ab5 cb5 5.Nc3 Qb6 6.e3 (6.e4 Na6+–) 6...a6 (6...e5 7.Nb5 Ba6 8.c4 Bb4 9.Ra4+–) 7.Nb5!+– Nc6 (7...ab5 8.Qh5 Double attack (8.Ra8 Pinning; 8.Ra8 Deflection; 8.Qh5 Decoy)) 8.c3 g6 (8...e5 9.e4+–) 9.Nf3 e5 10.e4 Bb7 11.Na3 Bh6 12.Bc4 Nge7 13.0–0 Kf8 14.Re1 d6 15.d4 ed4 16.cd4 (16.Nc2 f5 17.ef5 Nf5+–) 16...Rd8 (16...Nb4!? 17.d5 Kg7+–) 17.b5 Nb4 (17...ab5 18.Nb5 Ba6 19.Ra6 Qa6 20.Nd6 Qb6+–) 18.d5 a5 (18...Kg7 19.Qa4 a5 20.Bd4+–) 19.Bd4 Qc7 20.b6 Qc8 (20...Qd7 21.Bf6 Bg7 22.Bg7 Kg7 23.Ng5+–) 21.Bf6 Rg8 22.Nd4 Bg7 (22...Kf7 23.Qf3 Rgf8 24.Nc6 Bc6 25.dc6 Ke8 26.Nb5+–) 23.Ne6 Kf7 24.Bg7 Rg7 25.Qd4 Rgg8 26.Ng5 Ke8 27.Bb5 Nbc6 28.dc6 Ba6 (28...Bc6 29.Rac1 Rf8 30.Bc6 Nc6+–) 29.b7 Bb5 30.bc8Q Nc8 (30...Rc8?? 31.Nb5 Nc6 32.Qf6+–) 31.Nb5 h6 (31...Ke7 32.Qd5 Kf6 33.f4 Rdf8 34.Qe6 Kg7 35.Qd7 Ne7 36.Qe7 Rf7 37.Qf7 Kh6 38.Qh7) 32.Qf6 Ne7 (32...Rd7 33.Qe6 Kf8 34.cd7 Kg7 35.Qf7 Kh8 36.Qh7) 33.Qf7 (33.Nc7) 1–0. pcmvr – valerypavlovich (2100), net–chess.com, 2016.

4.Nf3 a5 5.ab5 Nh6 6.e4 d6 (better is 6...cb5 7.Bb5 Nc6 8.ba5 Ra5+–) 7.Nc3 Qb6 (7...Bb7 8.ba5 Ra5 9.Nd4+–) 8.Bc4 c5 (8...cb5 9.Bb5 Bd7+–) 9.Nd5 Qd8 (9...Qb7 10.ba5 e6+–) 10.b6 a4 (10...Na6 11.b5 e6 12.ba6 ed5 13.b7 Bb7 14.Bb5 Kf7 15.ab7+–) 11.Nc7 Kd7 12.Be6 Kc6 13.b5 Kb6 14.Na8 Kb7 (white timed out, 0–1). chessxliv (2100) – samantho (1875), net–chess.com, 2014.

3.e3 a6

4.a4 Nc6 5.ab5 Nb4? (better is 5...Nb8+–) 6.c3 Nd5 (6...Rb8 7.cb4 ab5 8.Na3+–) 7.Qh5 g6 8.Qd5 c6 (8...Rb8 9.Qb3+–) 9.bc6 dc6 10.Qd8 (better is 10.Qc6!? Bd7 11.Qf3 Rb8+–) 10...Kd8 11.Nf3 Bb7 (11...e5 12.d4 ed4 13.cd4+–) 12.Bc4 (12.Ba3 Bg7+–) 12...Nh6 13.0–0 e5 14.d4 e4 15.Nfd2 f5 16.Nb3 Ng4 17.N1d2 Bd6 18.h3 Nf6 19.Ba3 Ba3 20.Ra3 Nd7 21.Na5 Kc7 22.Rfa1 h5 23.h4 Rhf8 24.Ndb3 f4 25.Nb7 Kb7 26.Ra6 Ra6 27.Ra6 fe3 28.Na5 Kb8 29.Nc6 Kb7 30.fe3 Rf6 31.Bb5 Rf5 32.c4 g5 33.Ra7 Kc8 34.Ba6 1–0. pcmvr (2110) – valerypavlovich (2120), net–chess.com, 2006.

4.a4 e5 5.ab5 (5.Be5 Bb4 6.ab5 Bb7+–) 5...Bb4 (5...Bb7 6.ba6 Na6+–) 6.c3 (6.Be5 Bb7 7.Bf4 ab5 8.Ra8 Ba8+–) 6...Bc5 (6...Be7 7.d4=) 7.d4+= Bb6 (7...Bd6 8.Bd3 Bb7 9.Qh5 Kf8 10.Nf3=) 8.de5+– fe5 (better 8...Bb7!?+–) 9.Qh5+– g6?? (better 9...Ke7 10.Bc4 Qf8 11.Qe5 Kd8+–) 10.Qe5 Ne7 (10...Qe7 11.Qh8 Qf7+–) 11.Qh8 Ng8 12.Qg8 (12.Qg8 Ke7 13.Qh7 Kf8 14.Qh8 Ke7 15.Qg7 Ke6 16.Qg6 Qf6 17.Qe4 Qe5 18.Bc4 d5 19.Bd5 Kf6 20.Qh7 Qd5 21.c4 Bd4 22.Bd4 Qd4 23.ed4+–) 1–0. GuestHKDP – GuestMPJX, freechess.org, 2019.

4.a4 e6 5.Bc3+=.

3.e3 Bb7

4.Nf3 Bf3 5.Qf3+/– (5.gf3?! e5+=) 5...Nc6 6.Bb5 (better is 6.Bd3 e5 7.Qh5 Ke7 8.a3+/– (worse is 8.Bb5 Nb4 9.Ba3 c5 10.Bb4 cb4+=)) 6...e5? (better is 6...Nb4 7.Ba4 Rb8+=) 7.Bc6+– dc6 8.Qc6 Kf7 9.a3 Bd6 10.c4 Nh6 11.c5 Be7 12.0–0 Nf5 13.Qf3 (13.f4 ef4 14.Rf4 g6+–) 13...Nh4 (13...Qd3 14.Rc1+–) 14.Qh5 Ng6 15.f4 Qd5 (15...ef4 16.ef4 Kg8+–) 16.f5 Ke8 (16...Qd3 17.fg6 hg6 18.Qf3+–) 17.fg6 h6 18.Qe2 (18.d4 Qe4 19.de5 Qe3 20.Kh1 Rf8+–) 18...a5 19.Nc3 Qb3 20.d4 h5 (20...Rb8 21.Nb5 Bd8 22.de5 ab4 23.ef6 gf6 24.Qf3+–) 21.Rfb1 Qe6 22.Nb5 ed4 (22...Rc8+–) 23.Nc7 Kd7 24.Ne6 Ke6 25.Qc4 Kd7 26.Bd4 h4 27.Qd5 Ke8 28.Qa8 Kd7 29.Qh8 h3 30.Qh3 Ke8 31.Qc8 Bd8 32.c6 Ke7 33.Qd7 Kf8 34.Qf7 (34.Qd8) 1–0. nordlicht (2140) – harzer, gameknot.com, 2005.

4.Qh5 g6 5.Qb5 Ba6 6.Qa4 Bf1 7.Kf1 Bh6 8.Nf3 Qc8 9.a3 Na6 10.c4 c5 11.d3 cb4 12.ab4 Nc7 13.Nc3 f5 14.Nb5 Nf6 15.Bf6 ef6 16.Nd6 1–0. Bonetti,Shane – nicetrip, ICC, 2002.

4.Qh5 g6 5.Qb5 Bc6 6.Qc4 e6 7.b5 Ke7?? (better 7...Bb7+–) 8.bc6+– Nc6 9.Ba3 (9.Nc3 Kf7+–) 9...d6 (9...Kf7+–) 10.Qc6 (10.Qc6 Kf7 11.Nf3+–) 1–0. GuestRJPV – GuestLMRL, freechess.org, 2017.

3.e3 Nc6

4.a3 d5 5.Bb5 Qd6 6.Nc3 a6 (6...e5 7.d4 Nge7 8.de5 fe5 9.Qh5 g6 10.Bc6 Nc6 11.Qf3+–) 7.Ba4 (7.Bc6 Qc6 8.Qh5 Kd7 9.Qd5 Qd5 10.Nd5 Bb7+–) 7...Bd7 (better 7...e5!?+–) 8.Qh5+– g6 9.Qd5 Qd5 10.Nd5 0–0–0 11.Nf3 Bg4 (11...e5+–) 12.Bc6 Rd6 13.b5 ab5 14.Nb4 Bf3 (14...Bd7 15.Be4+–) 15.gf3 e5 16.d4 (better 16.a4 Ne7 17.ab5 Nc6 18.bc6 Kd8+–) 16...Ne7 (16...ed4 17.Bd4 Re6 18.Bd5+–) 17.Ba8 (better 17.de5 fe5 18.Bb5 Bg7+–) 17...ed4 18.Bd4 Nf5 19.c3 Re6 20.0–0–0 (20.Bd5!? Nd4 21.cd4 Rb6+–) 20...Bb4 (20...c5 21.Bd5 Rb6+–) 21.ab4 (21.cb4?! c6+–) 21...Rhe8 (21...Nd4 22.cd4 Ra6 23.Be4+–) 22.Kb2 Nd4 23.Rd4 (worse 23.ed4 Kd7 24.Be4 f5+–) 23...Ra6 24.Ra1 Ra1 25.Ka1 Kb8 (25...Re6 26.Bd5 Rd6 27.Bg8 Ra6 28.Kb2+–) 26.Bc6 Re5 27.Rd8 (27.Rh4!? h5+–) 27...Ka7 28.f4 Rh5 29.h3! Rh3 30.Bb5 Rh1 31.Kb2 Re1 (31...Rh2 32.Rd2+–) 32.c4 Re2 (32...Kb6 33.Be8 c5 34.Rd6 Kc7 35.bc5 Re2 36.Kc3 Rf2 37.Rd7 Kc8 38.Rh7+–) 33.Kb3 Rf2 (33...Kb7 34.c5 Rf2 35.c6 Ka7 36.Rc8+–) 34.c5 Rf3 (34...Kb7+–) 35.Bc6 Re3 36.Kc4 (36.Ka4 Re8 37.Re8 g5 38.Ra8) 36...h5 (36...Re4 37.Be4 c6 38.Bc6 g5 39.Ra8) 37.Ra8 1–0. GuestLGCP – Jimpaan, freechess.org, 2017.

4.a3 e5 5.Bb5 Nce7 6.Nf3 c6 7.Be2 Nd5 8.0–0 Nge7 9.c4 Nf4?? (9...Nc7 10.Nc3+–) 10.d3 (better is 10.ef4 ef4 11.Re1+–) 10...Ne2+/– 11.Qe2 g5 12.Ng5! Bb7 (12...fg5 13.Qh5) 13.Qh5 Ng6 14.Nh7 Qe7 (14...Kf7 15.f4 Qb6 16.f5 Qe3 17.Kh1+–) 15.Qg6 Kd8 16.Nf6 Rh6 17.Qe8 Qe8 18.Ne8 Ke8 19.Be5 d6 20.Bf4 Bg7 21.Bh6 Bh6 (21...Ba1 22.Nd2 Bf6 23.Ne4+–) 22.Nd2 d5 23.cd5 cd5 24.d4 Rc8 25.Rac1 Rb8 26.Nf3 Ba6 27.Rfe1 Bb7 28.Rc7 Kd8 (28...Bf8 29.Rh7 a6 30.Ne5+–) 29.Rec1 Bf8 30.Rh7 Rc8 (30...a5 31.ba5 Rc8 32.Rc8 Bc8 33.Ne5 Ba3 34.a6 Ba6 35.Ra7+–) 31.Rc8 Bc8 32.Ra7 (32...Bd6 33.Ne5+–) 1–0. hal1958 – ronan48, HCL–B2168 playchess.de, 2003.

4.a3 e5 5.d4 d5?? (better is 5...ed4 6.Qh5 g6=) 6.Bb5+– Bd7 7.de5 fe5 8.Qd5 Qe7?? (8...Nge7 9.Qc4 a5+–) 9.Bc6 Nf6 (9...Rd8+–) 10.Bd7 Qd7 11.Qd7 Nd7 12.Nf3 Bd6 13.0–0 Nf6 14.Nbd2 0–0 15.Ng5 h6 16.Ne6 Rf7 17.Bc3 Re8 18.Nc4 Re6 19.Nd6 cd6 20.Rad1 Ne4 (20...Ne4 21.Ba1 Rc7+–). Ento – Ronan48, playchess.de, 2003.

4.a4 Nb4 5.c3+– Nd5?? (better 5...Nc6 6.ab5 Ne5+–) 6.Qh5 g6 7.Qd5 c6 8.Qb3 Bg7 (8...ba4 9.Ra4 d5 10.c4+–) 9.ab5 c5 (9...cb5 10.Nf3+–) 10.Qd5 Rb8 11.Ra7 (11.Qc5 a6+–) 11...e6 (11...Qb6 12.Ra8 Ra8 13.Qa8+–) 12.Qc5 Ne7 13.Ba3 (13.Nf3 Bf8 14.Qc4 Bb7+–) 13...Bf8 (13...Bb7 14.Bb4+–) 14.Qc7 (14.Qc4!? Bb7 15.Bd6 Rc8+–) 14...Qc7 15.Rc7 Kd8 (15...Bb7 16.c4 Kd8 17.b6+–) 16.Ra7 Nf5 17.Bf8 Rf8 18.c4 Nd6 (18...Bb7 19.Nc3 Kc7 20.c5+–) 19.Nc3 Rb6 (19...Bb7 20.c5 Nc8 21.Ra4+–) 20.c5 Rb7 (20...Nb5 21.Bb5 Rb7 22.Ra8+–) 21.Ra8 Nf5 (21...Nf7 22.b6+–) 22.b6 d6 (22...Ke7 23.Ba6+–) 23.Ba6 dc5 24.Bb7 Kd7 25.Bc8 Rc8 26.b7 Rb8 27.Rb8 Kc7 28.Rf8 Kb7 29.Rf6 Nd6 30.Re6 Nc4 31.Re7 (31.Re7 Kc6 32.Nf3+–) 1–0. DEFFM – Aytek, freechess.org, 2019.

4.a4 Bb7!?+=.

4.Bb5 a6 5.Bc6+– dc6 6.c4 (6.Qf3 e5 7.Qc6 Bd7+–) 6...e5 7.Qh5 (7.Qa4 Bf5+–) 7...g6+= 8.Qf3 Bb4 9.Qc6 (9.Bc3 Rb8+=) 9...Bd7= 10.Qd5 (10.Qf3 Rb8+=) 10...c6 (10...Bf5 11.Nc3=) 11.Qe4 (11.Qf3 Rb8+=) 11...f5?? (better 11...Rc8 12.Qc2 Rb8=) 12.Qe5+– (12.Qe5 Qe7 13.Qh8+–) 1–0. DEFFM – GuestYTJT, freechess.org, 2016.

4.Bb5 Nb4!? 5.Nc3 Bb7+=.

3.e3 e5

4.a3 a6 5.c4 c6 6.c5 d6 7.d4 d5? 8.de5+– fe5 (8...a5 9.Bd3+–) 9.Be5 (9.Qh5 Ke7 10.Qe5 Kf7+–) 9...Nd7 10.Qh5?? (better 10.Bb2+–) 10...g6–+ 11.Qf3 (11.Qg6 hg6 12.Bh8 a5–+) 11...Ne5 12.Qe2 (12.Qd1 Bg7 13.Nd2 a5–+) 12...Bg4 (12...Bg7 13.Ra2–+) 13.Qd2 Bh6 (13...a5 14.Ra2–+) 14.Qd4 (14.Ne2 a5–+) 14...Qe7 (14...Bg7 15.Qd2–+) 15.Be2 (15.f4 Nd7 16.Qh8 0–0–0–+) 15...Nf6 (15...Bg7 16.Qd1 Nd3 17.Qd3–+) 16.f3 (16.a4 0–0 17.ab5 Ne4 18.bc6 Nf2 19.Qd5 Kg7–+) 16...Bd7 (better 16...Be3 17.Qe3 Nf3 18.Qf3 Bf3 19.Nf3–+) 17.Nh3 (17.Nd2 Bg7 18.Qh4 Nf7–+) 17...g5 (better 17...Bh3 18.f4 Ned7–+) 18.0–0 (18.Nf2 Bg7 19.Ra2 a5–+) 18...g4 19.Nf4 Bf4 (better 19...gf3 20.gf3 Ng6–+) 20.ef4 Ng6 (20...Nc4 21.Bc4 dc4 22.Nc3–+) 21.fg4 Ng4 (21...Qe2 22.Nc3 Qe6=+) 22.Bg4=+ Bg4 23.Nd2? (better 23.f5 Ne5 24.Nd2=+) 23...Nf4?? (better 23...0–0–+) 24.Qh8+– (24.Qf4?! Rg8 25.Rae1 Be6+–) 24...Kd7 25.Qa8 Qe3 26.Kh1 Qd2 27.Rf4! Qf4 (27...Qf4 28.Qb7 Double attack) 28.Qa7 (28.Re1 Be2 29.Qb7 Qc7 30.Qc7 Kc7 31.Re2 Kd7+–) 28...Ke6 (28...Qc7 29.Qa6 Qc8 30.Qb6+–) 29.Qh7 (better 29.Qb7+–) 29...Qd4 (29...Qe5 30.Rf1 Bh5+–) 30.Re1 Kf6 31.Qh6 (31.Rf1 Ke6 32.Qf7 Ke5 33.Qe7 Be6 34.Qf6 Ke4 35.Qf3 Ke5 36.Qg3 Ke4 37.Rf4 Ke5 38.Rf3 Qf4 39.Qf4) 31...Kf5+– 32.Rf1 (32.h4!? Be2 33.Qg5 Ke6 34.Re2 Qe4 35.Re4 de4+–) 32...Ke4 33.Qg6 (better 33.Rf4 Kd3 34.Qg6 Qe4 35.Re4 de4 36.Qg4+–) 33...Ke3 34.Qc6 Ke2 35.Rc1 (better 35.Rg1 Kd2+–) 35...a5 (35...Qe3 36.Rg1 Qe6 37.Qb6+–) 36.Rc2 (better 36.Qb5!? Kd2 37.Qf1 Qe5+–) 36...Ke3 (36...Kd3 37.Qg6 Qe4 38.Qe4 de4 39.Rc1+–) 37.Qh6 Kd3 (37...Ke4 38.Qg6 Bf5 39.Qe8 Kf4 40.Rc1+–) 38.Rc1 (better 38.Rd2 Kc4 39.Rd4 Kd4 40.Qf4 Kc3 41.Qg4+–) 38...a4 (38...ab4 39.ab4 Qb4+–) 39.c6 (better 39.h3+–) 39...Bc8 (39...Qe4 40.h3 Bf5+–) 40.Qg6 (40.Rd1 Kc4 41.Rd4 Kd4 42.Qh8 Ke4 43.Qc8 Kf4 44.Qf8 Ke4 45.c7 d4 46.c8Q Ke3 47.Qf3 Kd2 48.Qf2 Kd3 49.Qcc2) 40...Qe4 41.Rd1 (better 41.Qg3 Qe3 42.Rd1 Ke4 43.Qg6 Ke5 44.Qe8 Be6 45.c7+–) 41...Ke3 (41...Kc2 42.Qe4 de4+–) 42.Re1 (42.Qg3 Qf3 43.Qf3) 42...Kd3 43.Re4 de4 44.Qd6 (44.Qg8 Ba6 45.Qa8 e3 46.Qa6 e2 47.Qb5 Kd2 48.Qd5 Kc3 49.Qe5 Kd2 50.Qd4 Kc2 51.Qe3 Kd1 52.Qd3 Kc1 53.Qe2 Kb1 54.c7 Ka1 55.c8Q Kb1 56.Qf5 Kc1 57.Qec2) 44...Ke3 45.c7 Kf2 46.Qf4 (46.Qf8 Bf5 47.Qf5 Ke2 48.Qe4 Kd2 49.c8Q Kd1 50.Qcc2) 46...Ke2+– 47.Kg1 (better 47.Qe4 Kd2+–) 47...e3 48.Qf1 (better 48.Qf3 Kd2+–) 48...Kd2 49.Qb5 e2 50.Qd5 Ke1 51.Qe5 (51.Qd3 Bf5 52.c8Q Bc8 53.Qc2 Be6 54.Qc1) 51...Kd2+– 52.Qd4 (better 52.Kf2+–) 52...Ke1 53.Qa1 (53.Qd3 Bf5 54.c8Q Bc8 55.Qc2 Be6 56.Qc1) 53...Kd2+– 54.Qb2 (54.Kf2 Kd3+–) 54...Ke1 55.Qc1 1–0. alt20 – onofrioc91, lichess.org, 2015.

4.a3 c6 5.c4 a6 6.Nf3 Ne7 7.d4 e4 8.Nfd2 f5 9.c5 Nd5 10.Nc3 Be7 11.Nd5 cd5 12.a4 Bb7 (better is 12...ba4!? 13.Ra4 0–0+/–) 13.ab5+– 0–0 14.ba6 Ba6 15.Ba6 Na6 16.Qb3 f4? (better is 16...Nc7+–) 17.Qd5 Rf7 18.Qe4 (better is 18.ef4 Nc7 19.Qe4+–) 18...Nb4?? (18...fe3 19.fe3 d5 20.cd6 Bd6+–) 19.Ra8 Qa8 20.Qa8 Rf8 21.Qb7 Nc2 22.Kd1 fe3 23.Kc2 Rf2 24.Bc3 (24.Qb3 Rf7 25.Ne4 e2+–) 24...e2 25.Re1 Bg5 26.Qd5 Kh8 27.Qa8 Bd8 1–0. hal1958 – ronan48, HCL–B2148 playchess.de, 2003.

4.a3 d5 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 b5).

4.Bb5 Bb4 5.Qh5 g6 6.Qh4=.

4.Bb5 c6 5.Bd3 Ba6 6.Qh5+– g6? (better 6...Ke7 7.Bh7 Bc4+–) 7.Bg6! hg6 (7...Ke7 8.Bh7 Qe8 9.Qe8 Ke8 10.Bg6 Kd8 11.a3+–) 8.Qh8 Ne7 (8...Bc4+–) 9.Qf6 d6 (9...Qb6 10.Qd6+–) 10.Nf3 (10.Nc3 Kd7+–) 10...Nd7 (10...Qd7 11.h3+–) 11.Qd6 Nf5 (11...Bg7+–) 12.Qg6 (12.Qg6 Ke7 13.Qf5+–) 1–0. GuestQWWS – GuestXAIKIx, freechess.org, 2018.

4.Bb5 c6 5.Bd3 Bb4 6.Qh5 g6? (better 6...Kf8!?+–) 7.Bg6!+– hg6? (better 7...Kf8+–) 8.Qh8 Kf7 (8...Kf8 9.h4 d5 10.h5 gh5 11.Rh5+–) 9.Qh7 Kf8 10.Qg6 (10.a3 Bc5 11.Qg6 d5+–) 10...Qe8 (10...d5 11.Nf3+–) 11.Qe8 (11.Qe4 Na6+–) 11...Ke8 12.Ne2 (12.a3 Ba5+–) 12...d5 13.0–0 (better 13.h4 Bf5 14.Kd1 Nd7+–) 13...d4 (13...Nd7+–) 14.ed4 ed4 (14...e4 15.Nbc3+–) 15.Nd4 c5 (15...Kf7 16.Re1+–) 16.Nb5 (better 16.Re1 Kd7 17.Ne6+–) 16...a6 (16...Kd7+–) 17.Nc7 Kd7 (17...Kd8 18.Na8 Nd7 19.Re1+–) 18.Na8 Nc6 (18...Kd6 19.d4 Bb7 20.dc5 Kc5 21.Nc7+–) 19.Nb6 Kd6 (19...Kd8 20.Nc8 Kc8 21.h4+–) 20.Nc8 Ke6 21.Re1 Kd5 22.Re8 Ne5 23.Be5 fe5 24.Rg8 c4 25.Nb6 (25.Nb6 Kc5 26.Rg6+–) 1–0. GuestYWBR – GuestTHWK, freechess.org, 2019.

4.Bb5 c6 5.Be2 g5? (better is 5...Bb4!? 6.a3 Ba5=) 6.a3 (6.Bh5 Ke7+–) 6...d5 7.Bh5 Ke7 8.Nf3 (8.d4 e4+–) 8...Nh6 9.h3 Rg8 10.d3 Be6 11.Nbd2 a5 12.c3 Na6 13.Qb3 d4+/– 14.Qc2 de3 15.fe3 Nf5 16.Kf2 Bh6?? 17.Bg4+– Bg7 18.Rhe1 Nh4 19.Be6+– Ke6 20.Rad1 Nf5 21.d4 Bh6 22.Nc4 Qd5 23.Na5 e4 24.Nd2 Nh4 25.Qe4 Qe4 26.Ne4 f5 27.Ng3 g4 28.e4 gh3 29.ef5 Kf6 30.Re6 Kg5 31.Bc1 Kg4 32.Re4 Bf4 33.Rf4 Kg5 34.Re4 Kf6 35.Rh4 hg2 36.Kg2 Rae8 37.Kf3 Nc7 38.Rh6 Kf7 39.Rh7 Rg7 40.Rg7 Kg7 41.Nc6 Nd5 42.Bd2 Kf6 43.Ne5 Rg8 44.Rh1 Ne7 45.Rh6 Kg7 46.f6 Kf8 47.fe7 Ke7 48.Rg6 Rg6 49.Ng6 Kf6 50.Nf4 Ke7 51.a4 (51.a4 Kd7 52.a5+–) 1–0. Fournier,Frederic – jsabattin, Active, 2007.

4.Bb5 Ne7 5.Qh5 g6 6.Qf3 c6 (better 6...Nec6!? 7.Bc4 Bb7+–) 7.Qf6+– Nd5?? (7...Rg8 8.Be2 d6+–) 8.Qh8 (8.Qh8 cb5 9.Qe5 Ne7 10.Nc3+–) 1–0. DEFFM – GuestTZTu, freechess.org, 2018.

4.c4 bc4 5.Bc4 (better is 5.Be5 d5 6.Bf4=) 5...Bb4?? (better is 5...d5 6.Bd3 e4=) 6.Qb3+– Ke7 (6...Bd2 7.Nd2 Nh6+–) 7.Qb4 d6 (7...Ke8 8.Qb3 Ne7 9.Bf7 Kf8 10.Ba3+–) 8.Nf3 (8.d4 Nc6 9.Qc3 ed4 10.ed4 Rb8+–) 8...Nc6 (8...c5 9.Qb3 Nc6 10.Nc3+–) 9.Qb5 (9.Qc3 Rb8+–) 9...Bd7 (9...Rb8 10.Qc6 Rb2 11.Bb3+–) 10.Qd5 Qf8 11.Nc3 Rb8 12.Nb5?? Kd8?? 13.Rb1?? Nb4=+ 14.Qe4 Bb5 15.Bb5 Rb5 16.0–0 d5 17.Qf5 Nh6–/+ 18.Qh3 Qc5 19.Ba3 Qc4 20.Rfc1?? Nc2?? 21.Rb5+– Qb5 22.Rc2 Qa4?! 23.Ne1 Qa3=+ 24.Qe6 Qd6 25.Rc6 Qe6–/+ 26.Re6 Kd7 27.Ra6 Rb8 28.Ra7 Rb1 29.Kf1=+ d4 30.h3 d3=+ 31.f3 Nf5–/+ 32.Kf2? Rd1 33.Ra3 Rd2 34.Kg1 Rd1 35.Rd3–/+ Rd3 36.Nd3 Ne3 37.Kf2 Nc4 38.a4 Kd6 39.Ke2 f5 40.Nc1 Kc6 41.Nb3 Kb6 42.h4 c5 43.h5 Nd6 44.Kd2? Nc4 45.Kc3 Ne3–/+ 46.g3 e4 47.fe4 fe4 48.Nd2 Nd5 49.Kc4 e3–+ 50.Nf3 Nb4 51.a5 Ka5–/+ 52.Kc5 e2 53.Ne1 Ka4 54.Kc4? g5 55.hg6= hg6 56.Kc3 g5 57.Kd2 Kb5 58.Nf3 Nd5 59.Ng5 Kc6 60.Ke2 Kd7 61.Kf3 Ke7 62.Ne4 Nf6?? 63.Nf6+– Kf6 64.Kf4 Kg6 65.Kg4 Kg7 66.Kg5 Kf7 67.Kf5 Kg7= 68.g4 Kh8?? 69.g5 Kg8?? 70.Kg6+– Kf8 71.Kh7 1–0. phildo – ariou, net–chess.com, 2003.

4.Be5+/– a5 5.ba5 Ra5+/–.

4.Be5+/– fe5?? 5.Qh5+– g6 6.Qe5 (6...Qe7 7.Qh8+–) 1–0. Wall,Bill – Troutman G, internet, 2004.

3.e3 e6

4.a3 Bd6 5.Qh5 Kf8 6.Bb5 (6.Nf3 a6+–) 6...a5+– 7.Qf3 (7.Nc3 Bb7 8.Nf3 ab4 9.ab4 Ra1 10.Ba1 Ne7+–) 7...c6 (7...Nc6 8.Ne2+=) 8.Bd3 ab4 9.ab4 Ra1 10.Ba1 Bb4 11.Nc3 (11.Qf4 Qb6 12.Nf3 Ne7+–) 11...Nh6 12.Nge2 Bb7? (better 12...d5!?+=) 13.0–0+– Qc7 14.Ne4 (14.Rb1 c5 15.Qh5 Nf7+–) 14...c5+– 15.c3 (better 15.Qh5 Nf7 16.Rb1+–) 15...d5?? (better 15...c4 16.Bc2 Be7+=) 16.cb4 (better 16.Nf6 Ba3 17.Nh7 Ke7 18.Nf4+–) 16...de4 17.Be4 Be4 18.Qe4 cb4 (18...Qc6 19.Qc6 Nc6 20.bc5+–) 19.Qb4 (better 19.Qe6 Qd7 20.Qc4+–) 19...Kg8?? (better 19...Kf7+–) 20.Rc1 Qd8 (20...Nc6 21.Qe4 Kf7 22.Rc6 Qd7+–) 21.Qb7 Nf7 22.Rc8 (22.Rc8 h6 23.Rd8 Nd8 24.Qb8+–) 1–0. Atotheking (1770) – zhyvtone (1810), lichess.org, 2021.

4.a3 Ne7? (4...a6!?+=) 5.Bb5 (5.Qh5 Ng6+–) 5...Ng6 6.Nf3 Be7 7.0–0 0–0 8.d4 Bb7 9.Nbd2 a6 10.Bd3+– d5 11.c4 Nc6 12.cd5 ed5 13.Qc2 Qe8 14.Rac1 Bd6 15.Rfe1 Nce7 16.e4 f5?? 17.e5 Nf4 18.ed6 Qg6 19.g3 Nd3 20.de7 Ne1 21.ef8Q Rf8 22.Re1 f4 23.Qg6 hg6 24.Re7 fg3 25.hg3 Bc8 26.Rc7 Bg4 27.Kg2 Bf3 28.Nf3 Rf7 29.Rf7 Kf7 30.Ne5 Kf6 31.Bc1 g5 32.f4 gf4 33.Bf4 g5 34.Be3 Kf5 35.Kf3 1–0. Fournier,Frederic (1685) – elviodavid, Active, 2009.

2.Bb2 Nf6
(earlier: 1.b4 Nf6 2.Bb2 b5 (Fehr’s defence))

3.a3 a5 4.Nc3 ab4 5.ab4 Ra1 6.Qa1 c6 7.Nf3 Na6 0–1. dariuscyclone (2265) – croach (2395), net–chess.com, 2011.

3.a3 d5 4.Nf3 c6 5.e3 a5 6.Ne5 ab4 7.ab4 Ra1 8.Ba1 e6 9.c3 Bd6 10.Ng4 0–0 11.Nf6 Qf6 12.d4 e5 13.Be2 ed4 14.ed4 Re8 15.0–0 Qh4 16.g3 Qe7 17.Bd3 Nd7 18.Nd2 Nf6 19.Nf3 Bg4 20.Bb2 (better is 20.Kg2!?–/+) 20...Ne4–+ 21.h4 Qf6 22.Kg2 Bf3 23.Qf3 Qf3 24.Kf3 Nd2 25.Kg2 Nf1 26.Kf1 g6 0–1. NN – Fournier,Frederic, Paris FRA, 1993.

3.a4 Ba6 4.ab5 (4.e3 c6+=) 4...Bb5= 5.Nc3 Bc6 6.Nf3 e6 7.b5 Bb7 8.e3 c6 (8...a6 9.Be2=) 9.Bc4 a5 10.0–0 d5 11.Bb3 (11.Bd3 cb5 12.Nb5 Nbd7+=) 11...c5 (11...Bd6 12.Ba4=) 12.Ne2 (12.Qe2 Bd6=) 12...Nbd7 13.d3 Bd6 14.c4 0–0 (14...dc4 15.dc4 Bf3 16.gf3=) 15.h3 (15.cd5 Bd5 16.Bd5 Nd5=) 15...dc4+= 16.dc4 Qc7 (16...Bf3 17.gf3 Be5 18.Nc3=) 17.Nc3= Ne5 (17...Rfd8 18.Qe2=) 18.Ne5 Be5 19.f4 Rfd8 20.Qe1 Bd6 21.Bc2 Be7 22.e4 Rd4 23.Ra4 Qd8 (23...Rad8 24.Nb1 Ne4 25.Bd4 Rd4 26.Qa5 Qa5 27.Ra5+/–) 24.Qe3 Rd2 25.Rf2 Rf2 26.Qf2 Qd4 27.Nd1 (27.Qd4 cd4 28.Ne2 Ne4 29.Nd4 Nc5+=) 27...Qf2 (27...Qd8 28.Bf6 Bf6 29.e5+=) 28.Nf2 (worse is 28.Kf2 Ne4 29.Ke3 Ng3+=) 28...Nd7 29.Ra3 Nb6 30.Bd3 a4 31.Be5 Nd7 32.Bc7 Rc8 33.b6 Bd8 34.Bd8 Rd8 35.Ra4 Nb6 36.Ra5 Nd7 37.Ra7 Rb8 38.e5 Nb6 39.Be2 g6 40.Kh2 h5 41.Kg3 Kg7 42.Nd3 Nc4 43.Nc5 Bd5 44.Bf3 Kg8 45.Nd7 Rb3= 46.Nf6 Kf8 47.Nd5 ed5 48.Kh4 Ne3 49.Kg5 Rb5 50.g4 hg4 51.hg4 d4 52.Rd7 Kg7 53.Be4+– Kf8 54.Rd4 Ke7 55.Bf3 Rc5 56.Ra4 Rc3 57.Ra7 Ke6 58.Kh6 Rc5 59.Ra6 Ke7 60.Kg7 (60.Kg7 g5 61.f5 Re5 62.f6 Kd8 63.Kf7+–) 1–0. Thystrup,Preben – Fehr,Wolfgang, corr 3GMM–26, 1996.

3.a4 Nc6 4.ab5 Nb4 5.c3 Nbd5 6.e4 (6.c4 Nf4+=) 6...Nb6 (6...Ne4!? 7.d3 Nd6+=) 7.e5+= Ne4 8.d4 e6 9.h4 (9.Bd3 Bb7+=) 9...d6 (9...Bb7 10.Bd3=) 10.Bd3+= Bb7 11.Qc2 f5 12.f3 (12.ef6 Nf6 13.f3 c6+=) 12...Ng3 13.Rh3 Nh5 14.Ne2 Be7 15.Qb3 (15.Nd2 A) 15...Bh4 16.g3 Ng3 17.Ng3+– (worse is 17.Rg3 f4–/+); B) 15...de5 16.de5 Nd7=) 15...Bh4 16.g3 Bg3?? (16...Bd5 17.Qd1 Ng3 18.Ng3 Bg3 19.Rg3 Qh4–+) 17.Ng3+/– (17.Rg3 Bd5 18.c4 Ng3 19.Ng3 Qh4 (worse is 19...Bf3 20.Bf5 ef5 21.Qf3+=) 20.cd5 Qg3 21.Ke2 Nd5+=) 17...Nf4 18.Bf5 (better is 18.Bf1+=) 18...Bd5 19.Qc2 ef5 20.Qf5? (better is 20.Rh1!? Qg5 21.Rg1–+) 20...Nh3–+ 21.Qh3 Qg5 (21...Bf3 22.Nf5 g6 23.Qf3 gf5 24.Qh5 Ke7 25.Qf5–/+) 22.Qh5 Qh5 23.Nh5 Bf3 24.Ng7 Kf7 25.Nf5 Nc4 (25...Nc4 26.Nd2 Nd2 27.Kd2 de5 28.de5 Rhd8 29.Ke3 Bd5–/+) 0–1. Grehl,Siegfried – Fehr,Wolfgang, corr SOK–92–82, 1992.

3.Nc3 c6 4.e4 (4.a4 A) 4...ba4 5.e4 (5.Ra4 Qb6 6.e4 Na6 7.e5 Nd5 8.Nd5 cd5 9.Ba3 e6) 5...a5 6.Ra4 Ba6 7.b5 cb5 8.Bb5 Bb5 9.Nb5 Qb6; B) 4...Bb7 5.ab5 a6 6.b6 Qb6 7.Na4 Qc7 8.Bd4 c5 9.Bc5 Nc6; C) 4...e5= 5.Nf3 (5.ab5 Bb4 6.e3 0–0 7.Nf3 Re8 8.Be2 a6 9.0–0 Bb7) 5...e4 6.Nd4 Bb4 7.ab5 cb5 8.Ncb5 Nc6 9.e3 0–0) 4...d5 (4...a5 5.e5 ab4 6.Nb5 cb5 7.ef6 ef6 (7...gf6 8.Nf3 Rg8 9.g3 Qb6) 8.Nf3+= Bc5 9.Qe2 Kf8) 5.e5+= Ne4 (5...Ng4 6.a4+= (6.Nf3 Nd7 7.e6 fe6 8.Be2 a5 9.Ng5 Ngf6) 6...Na6 7.Nf3 Qb6 8.d4 Nb4 9.Be2 Bd7) 6.Ne4 (6.Qf3 Nc3 7.Bc3 a5 8.ba5 Na6 9.Nh3 d4) 6...de4 7.Qe2 (7.a4+= Na6 8.Bc3 e6 9.ab5 Nb4; 7.Nh3 Na6 8.Bc3 h5 9.Nf4 Nc7) 7...h5? (7...Bf5 8.a4 (8.g4 Bg6 9.Bg2 e6) 8...e6 9.Bc3= (9.g4 Bg6) 9...Na6) 8.0–0–0?? (better is 8.Qe4 Be6 9.a4+–) 8...Bg4+= 9.f3 (better is 9.Qe4 Bd1 10.Kd1+=) 9...Qb6?? (better is 9...ef3 10.gf3 Be6+=) 10.fg4+– hg4 11.Qe4 g6 12.Qg4 e6 13.Bd3 Bh6 14.Bg6! fg6 15.Qe6 Kf8 16.Rf1 Kg7 17.Qf7 1–0. Taulien,Hans_Juergen (2350) – Mahlow,Cerstin (2000), remoteschach.de, 2001.

3.Nc3 Nc6 4.Nb5 Ba6 (4...Rb8 5.e3+=) 5.e3 Nb4 6.a3 Bb5 7.Bb5 Nbd5 8.Nf3 (8.Rb1 Rb8 9.Bc4 e6+=) 8...Rb8= 9.c4 a6 10.a4 (better is 10.Bf6 ab5 11.cd5 ef6 12.0–0+=) 10...Nb4 11.0–0 (11.Bc3 Nd3 (11...ab5?! 12.Bb4 bc4 13.Bc3=) 12.Ke2 Ne4 13.Ba6 Nef2–/+) 11...ab5 12.cb5 e6 13.Nd4 (13.Qe2 Nc2 14.Rac1 Na3–/+) 13...Be7 14.Qe2 c5 15.a5? (better is 15.Nb3–+) 15…cd4 (15...cd4 16.Bd4 Nc2 17.Bf6 Bf6–+) 0–1. Stummerer,Alfred – Fehr,Wolfgang, corr SOK–90–66, 1990.

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

3.e3 Nd5 4.Bb5 Nb4 5.a3 c6 6.ab4 cb5 7.Na3 e6 8.Nb5 Bb4 (8...Nc6 9.c3+=) 9.c3 (better is 9.Qg4!? Nc6 10.Qg7+–) 9...Bc5+= 10.d4 Bb6?? (better is 10...Qb6 11.Qa4 Be7=) 11.Nd6+– Ke7 12.Ba3 Kf6 (12...Qg8 13.Nc8 Kd8 14.Nb6 ab6 15.Bd6 Ra1 16.Qa1+–) 13.Qf3 (13.Qh5 Bc5 14.Qf7 Kg5 15.Qg7 Kh5 16.h4 Bd6 17.g4) 13...Kg6+– 14.Nf7 Qf6 (14...Nc6 15.Nd8 Bd8+–) 15.Nh8 Kg5 16.Be7 Qe7 (16...e5 17.Bf6 gf6 18.Nh3 Kh6 19.Qf6 Kh5 20.Qg5) 17.Qf4 Kh5 18.g4 (18.h4 Bd4 19.g4) 18...Kh4 19.Nf3 Kh3 20.Qg3 1–0. Fournier,Frederic – Chalvet,Philippe, France, 1993.

3.f3 a6 4.Bf6 (4.a4 e6=) 4...ef6+= 5.g4? (5.c3 a5 6.e4 c6 7.ba5 d5+=) 5...Bd6 (5...f5 6.e3–+) 6.Bg2 (6.c3 Bb7 7.e3 a5+=) 6...0–0 (6...Bb4 7.a4–/+) 7.h4 (7.c3 a5–/+) 7...Nc6 8.Nh3 Bg3 9.Nf2 Nb4 10.Rf1 (10.f4 Rb8–+) 10...Bh4 11.Rh1 Bg3 12.Rh3 Be5 (12...Bf2 13.Kf2 Re8 14.c3–+) 13.c3 Nc6 14.Ne4 (better is 14.a4 ba4 15.Qa4–+) 14...Ne7?? (better is 14...d5!? 15.Nf2 Re8–+) 15.d4? (better is 15.f4!? d5 16.fe5+=) 15...Bf4 16.Kf2? (16.e3 Be3 17.Nf6 gf6 18.f4 Bf2 19.Kf2+=) 16...c6 17.Rh7?? (17.Qh1 h6 18.e3=) 17...Nd5 (better is 17...Kh7 18.e3 Bh6–+) 18.Qh1+= Be3 19.Kf1 g6?? (better is 19...Bh6 20.Rh6 gh6 21.Qh6 Re8+=) 20.Rh8 Kg7 21.Qh7 1–0. jmcauley (1800) – samantho (1905), net–chess.com, 2013.

3.Nf3 a6 4.e3 e6 5.c4 bc4 6.a3 d5 7.Nc3 c6 8.d4 Bd6 9.Be2 Nbd7 10.h3 0–0 11.0–0 Bb7 12.Re1 Qc7 13.e4 de4 14.Ne4?? (better is 14.Nd2+=) 14...Ne4–+ 15.Bc4 Nef6 16.Rc1 Nb6 17.Bb3 Rac8 (17...a5 18.b5 Bf4 19.Rc5–+) 18.d5 (18.Ne5 Nbd5–+) 18...ed5 (better is 18...Nbd5!? 19.Bd5 Nd5 20.Qd4–+) 19.Bf6 gf6 20.Qd4 Nd7 (20...Bf4!? 21.Rcd1–+) 21.Qg4 Kh8 22.Bd5 Ne5 (22...c5 23.Bb7 Qb7 24.Rcd1–+) 23.Ne5 (23.Qf5!? Qd8 24.Be4 Nf3 25.Qf3–/+) 23...Be5 24.Be4 Rg8 25.Qf5 Rg7 26.h4 Rcg8 27.h5 h6 28.Rf1? (28.Qh3 a5–+) 28...Qd6 (28...c5 29.Rfd1 Rg2 30.Kf1 Be4 31.Qe4 Rf2 32.Kf2 Bd4 33.Rd4 Qh2 34.Ke3 Rg3 35.Qf3 cd4 36.Ke4 Qh4 37.Kd5 Rf3 38.Rc8 Kg7 39.Kc6 Rc3 40.Kb7 Qe4 41.Ka6 Qe6 42.Ka5 Ra3 43.Kb5 Qa6 44.Kc5 Rc3 45.Kd5 Qe6 46.Kd4 Qe5) 29.Rcd1 Qe6 30.Qf3 (30.g3–+) 30...Rg2 31.Qg2 Rg2 32.Bg2 Qg4 33.Rd8 Kg7 34.Re1 c5 (34...c5 35.f3 Bf3–+) 0–1. alcman – Fournier,Frederic, Active, 2009.

3.Nf3 d6 4.e3 e5 5.Bb5+/– c6 (5...Bd7 6.Bd7 Nbd7 7.Nc3 d5 8.a3 Bd6 9.0–0 0–0 10.Qe2) 6.Be2 Be6 (6...Nbd7 7.Nc3 Be7 8.0–0 0–0 9.Rb1 Rb8 10.a3) 7.0–0 (7.Nc3 Qb6 8.a3 h6 9.0–0 Nbd7 10.d4) 7...Nbd7 (7...Qb6 8.Nc3 Be7 9.Ng5 Nbd7 10.a3) 8.c4 (8.Ng5 Rb8 9.a3 Be7 10.Ne6) 8...e4 (8...Rb8!? 9.a3 (9.b5 h6 10.Nc3) 9...a5+/– (9...h6 10.d4) 10.b5; 8...Qb6 9.b5 cb5 10.cb5) 9.Nd4+– (9.Ng5 Rb8 10.b5) 9...d5 (9...Qb6 10.Qa4) 10.Nc3 dc4 11.Ne6 fe6 12.Bc4 (12.a3 a5+/–) 12...Ne5 (12...Bb4 13.Qa4 Qb6 14.Qc2+/– (worse is 14.Be6 Nc5 15.Qc2 Ne6+=)) 13.Be6 Nd3 14.Rb1 Nb2 (14...Bb4 15.Ne4! Ne4 16.Bg7+–) 15.Rb2 Qd6 (15...Bd6 16.h3+–) 16.Qb3 Rb8 17.a3 Nd5 (17...Nd5 18.Nd5 cd5 19.Bd5 Qe5+–). marcosramospg – valerypavlovich (2105), net–chess.com, 2010.

3.f4 Nc6 4.e3 (4.a3 e6=) 4...Nb4 5.a3 Nbd5 6.Bb5 (6.e4 Nb6+= (worse is 6...Ne4 7.Qf3+/–)) 6...Rb8+= 7.Bf6 ef6 (7...Nf6 8.Nc3+=) 8.Bc4 (8.Be2 f5+=) 8...Nb6+= 9.Bb3 (9.Be2+=) 9...Bc5 (better is 9...c5!?+=) 10.Bf7+= Kf7 11.Qh5 g6 12.Qc5 a6 (12...d6 13.Qa5+=) 13.Nf3+/– Re8 (13...d6 14.Qa5+/–) 14.0–0 (14.f5 d6 15.fg6 hg6+/–) 14...c6 (14...d6!? 15.Qc3 Kg8+=) 15.f5 (better is 15.Qd6 Bb7 16.Nc3+/–) 15...Re7? (better is 15...g5+/–) 16.Qd6 Ra8 (16...Bb7 17.fg6 Kg8 18.Qf6 hg6 19.Qg6 Rg7 20.Qd6+–) 17.fg6 hg6 18.Ng5 Kf8 (18...Kg8 19.Rf6 Rg7+–) 19.Qf6 (19.Qf6 Kg8 20.Nf7 Rf7 21.Qf7 Kh8 22.Qg6 Qe8 23.Qe8 Kg7 24.Rf7 Kh6 25.Qg8 d6 26.Rh7) 1–0. Wall,Bill – Sagebrushlady, internet, 2005.

3.a3 Bb7

4.d4 e6 5.Nd2 d5 6.Ngf3 Bd6 7.e3 a6 8.Bd3 h6 9.0–0 h5 10.Nb3 Nc6 11.Re1 h4 12.Nc5 Bc8 (12...Bc5 13.dc5 h3 14.g3+=) 13.e4 (13.Ne5 Bc5 14.Nc6 Qd6+/–) 13...de4 14.Ne4 Ne4? (better is 14...h3!? 15.Nf6 Qf6=) 15.Be4+– (15.Re4?! Kf8+/–) 15...Bb7 16.Qe2 Qb8 (16...h3!? 17.c4 Qb8+–) 17.d5+– Ne5?? (17...ed5 18.Bd5 Ne7 19.Bg7 Rg8 20.Bb7 Qb7+–) 18.Ne5 Be5 19.Be5 f6 (19...Kf8 20.de6 Be4 21.Qe4+–) 20.Bg6 Kf8 (20...Kd7 21.de6 Kc8+–) 21.Bd6 cd6 22.Qe6 Qc7 (22...Bd5 23.Qd5 Qa7 24.Qd6 Kg8 25.Qe6 Kf8 26.Qe8 Re8 27.Re8) 23.Qe8!! 1–0. capa1 (1685) – pittol, gameknot.com, 2014.

4.e3 a6 5.Nf3 g6 (5...e6 6.c4 bc4 7.Bc4=) 6.c4+= Bg7 (6...bc4!? 7.Bf6 ef6 8.Bc4 d5+=) 7.cb5+– 0–0 8.ba6 Ba6 9.Ba6 Na6 10.d4 Ne4 11.0–0 d6 (11...d5 12.Qc2+–) 12.Nbd2 Nd2 13.Qd2 c5 (13...Qd7 14.Rfc1+–) 14.dc5 dc5 (14...Bb2 15.Qb2 dc5 16.Ne5+–) 15.Bg7 Kg7 (15...Qd2 16.Nd2 Kg7 17.b5+–) 16.Qb2 (better 16.Qc3!? Kg8 17.b5 Nb8 18.Qc5 Ra4+–) 16...f6 17.b5 Nc7 (17...Qb6 18.Nd2+–) 18.b6 Nd5 19.a4 (better 19.b7 Rb8 20.Rfd1+–) 19...Qb6+= 20.Qb6 Nb6 21.Rfb1?? (better 21.a5 Nd7 22.Rfd1+=) 21...Ra4 22.Ra4 Na4 23.h3 (23.Kf1 Rd8–/+) 23...Rc8–+ 24.Ra1 Nc3 25.Rc1?? (better 25.Kf1–+) 25...Ne2 26.Kf1 Nc1 27.Ke1 Nd3 28.Ke2 Ne5 (28...c4 29.Nd2–+) 29.Kd2 (29.Ne5 fe5 30.Kd3 c4 31.Kc3 Rf8–+) 29...Nf3 30.gf3 e5 (30...Kh6 31.f4–+) 31.Kc2 (31.e4 Ra8–+) 31...Kf7 (better 31...Kh6!? 32.Kc3–+) 32.Kc3 Ke6 33.Kc4 Kd6 34.e4 (34.Kd3 Ra8–+) 34...Rb8 35.h4 (35.Kc3 Rb1–+) 35...Rb4 36.Kc3 Rd4 37.Kc2 h5 38.Kc3 Kc6 39.Kc2 Kb5 (39...g5 40.hg5 fg5 41.f4 gf4 42.Kb3 h4 43.Kb2 h3 44.Ka2 h2 45.Kb3 h1Q 46.Kc2 Qe4 47.Kc3 Qd3 48.Kb2 Rb4 49.Kc1 Rb1) 40.Kc3 c4 (40...g5 41.hg5 fg5 42.f4 gf4 43.Kc2 h4 44.Kc1 h3 45.Kc2 h2 46.Kc1 h1Q 47.Kb2 Rd2 48.Kc3 Qc1 49.Kb3 c4) 41.Kc2 Rd3 (41...g5 42.hg5 fg5 43.Kb2 h4 44.Kc1 h3 45.Kb2 h2 46.f4 h1Q 47.Kc2 Qd1 48.Kb2 Rd2 49.Kc3 Qc2) 42.Kb2 Rf3 43.Kc2 Rf2 44.Kc1 Rf4 (44...g5 45.hg5 fg5 46.Kd1 g4 47.Ke1 g3 48.Kd1 g2 49.Ke1 g1Q) 45.Kd1–+ Re4 46.Kd2 Rh4 (46...Rd4 47.Kc2 e4 48.Kb2 e3 49.Kc2 e2 50.Kb2 Kb4 51.Kc2 e1Q 52.Kb2 Rd2) 47.Kc2–+ Rd4 48.Kc1 (48.Kc3 Rd3 49.Kc2 e4 50.Kb2 e3 51.Kc2 e2 52.Kc1 e1Q 53.Kc2 Qe2 54.Kc1 Rd1) 48...f5 (48...e4 49.Kc2 e3 50.Kc3 e2 51.Kb2 Kb4 52.Kc2 e1Q 53.Kb2 Rd2) 49.Kb2 f4 50.Kc2 (50.Kb1 f3 51.Kb2 f2 52.Ka1 Rd2 53.Kb1 f1Q) 50...f3 51.Kc1 (51.Kb2 f2 52.Ka1 Rd2 53.Kb1 f1Q) 51...f2 52.Kc2 (52.Kb2 g5 53.Kc3 f1Q 54.Kc2 Qe2 55.Kc3 Rd3) 52...f1Q 53.Kc3 (53.Kb2 Qe2 54.Kc3 Rd3) 53...Qf3 (53...Qc1) 54.Kb2 (54.Kc2 Qe2 55.Kc3 Rd3) 54...Qe3 (54...Rd2 55.Kc1 Qd1) 55.Kc2 (55.Kb1 Rd1 56.Kc2 Qd2) 55...Rd2 56.Kc1 Qe1 0–1. alddhsfd (1800) – Ocet (1780), lichess.org, 2019. (=1.a3 Nf6 2.b4 b5 3.Bb2 Bb7)

4.Nf3 a5 5.e3=.

4.Nf3 Nc6 5.e3+= d5? (better is 5...a6!?+=) 6.Bb5+– e6? (better is 6...a5+–) 7.Ne5 Bd6 (7...Qd6 8.c4 dc4 9.Qa4+– (9.Nc4?! Qd5 10.Qe2 Qg2+=)) 8.Nc6 (8.Nc6 Qd7 9.Nd4+–) 1–0. Wall,Bill – IplayChess, internet, 2001.

3.a4 ba4

4.Ra4 Bb7 5.e3 Bc6 (5...e6 A) 6.Nf3 Nd5 7.b5 (7.c3 c5 8.bc5 4...Bb7) 7...a5 8.Bd3 Nb6 9.Ra1 f6 10.Nh4 g6; B) 6.Nc3 a6 7.Nf3 c5 8.b5 Qb6 9.Ra2 Bd6 10.Bc4 Be7 11.Na4 Qc7 12.b6 Qc6 line; 5...Nd5 6.Qg4=) 6.b5+= Bb7 7.Nf3 a6 8.ba6 (better 8.Nc3+=) 8...Bf3?? (better 8...Na6 9.Bb5 e6=) 9.Qf3+– Ra7?? (better 9...Nc6 10.Bf6 ef6+–) 10.Bd4 Rb7 (10...Nc6 11.Ba7 e5+–) 11.Qb7 Ng8 12.a7 Na6 13.Ra6 c6 14.a8Q Qa8 (14...f6 15.Qd7! Kf7 16.Bc4 Kg6 17.Bd3 Kf7 18.Qad8 Nh6 19.Q7e8 Ke6 20.Rc6) 15.Ra8 1–0. DEFFM – GuestQRYT, freechess.org, 2018.

4.Ra4 Bb7 5.Nf3 e6 6.e3 Bc6 (6...Nd5 7.b5 a6 8.Nc3 Nb6 9.Ra1 Be7 10.Bd3 ab5; better is 6...Nc6!? 7.c3 Nd5+=) 7.b5+/– Be4 1–0. rcm06 (2170) – toffie62 (1850), gameknot.com, 2014.

4.Ra4 d5 5.e3 Bd7 6.b5 a6 7.Nf3 c5 8.c4 Bg4 (better is 8...e6!?+=) 9.cd5+/– Nd5?? (better is 9...Bd7+/–) 10.Rg4+– Nf6 (10...h5 11.Ra4 e6 12.ba6+–) 11.Bf6 ef6 12.Qc2 g6 (12...Ra7 13.ba6 Qb6+–) 13.Qe4 (13.Qe4 Be7 14.Qa8 ab5 15.Bb5 Kf8 16.Nc3+–) 1–0. pcmvr (2225) – hsingletary (2155), net–chess.com, 2006.

4.Ra4 d5 5.e3 e6 6.Nf3 Bd7 7.b5 a6 (7...c6!? 8.Nc3 Bd6=) 8.Ne5+= c5 9.c4 Bd6 10.cd5 ed5 11.Nd7 (worse is 11.ba6 Ba4 12.Qa4 Kf8+=) 11...Qd7 (better is 11...Nbd7!? 12.Ra6 Ra6 13.ba6 0–0+=) 12.Bf6+– gf6 13.Nc3 Qb7? (better is 13...Be5+–) 14.Qf3 Be7 (14...Be5 15.Nd5 Kf8 16.ba6+–) 15.ba6 Na6 16.Qd5 (16.Nd5?! Qb1 17.Qd1 Qb7+–) 16...Qd5 17.Nd5 1–0. FortKnox – Bossjos, playchess.de, 2005.

4.Ra4 d6 5.Ra1 Bd7 6.Bf6 gf6 (6...ef6 7.e3=) 7.c3 Bg7 (7...c5 8.bc5 dc5 9.Nf3=) 8.Qb3 (8.d4 d5+=) 8...f5 (8...c6 9.d4=) 9.Nf3 Be6 10.Ng5?? (better 10.Qc2=) 10...Bb3–+ 11.c4 (11.e3 Bd5–+) 11...Bc4 (better 11...Ba1 12.e3–+) 12.d3 Bb3 (better 12...Ba1 13.dc4 c5 14.g3–+) 13.Ra3 Bc2 14.Nd2 Bd3! 15.ed3 (15.Rd3 Nc6 Combination; 15.ed3 Nc6 Combination) 15...h6 (15...Nc6!? 16.Be2–+) 16.Ngf3 0–0 (16...c6 17.Be2–+) 17.Be2 e5 18.0–0 e4! 19.de4 fe4 20.Ne4 d5 21.Nc5 (21.Ng3 Qe7 22.Rb1 c5–+) 21...Nd7 22.Nd3 (22.Nd7 Qd7 23.b5 Rfb8–+) 22...c6 23.g3 (23.Ra6 Re8 24.Re1 Qc8–+) 23...a5 24.Rb3 (24.ba5 Ra5 25.Rb3 Re8–+) 24...a4 (better 24...Re8 25.Bd1–+) 25.Rbb1 (25.Ra3 Re8 26.Bd1 Qf6–+) 25...a3 26.Nh4 (26.Nc1 a2 27.Na2 Ra2–+) 26...a2 27.Ra1 Ba1 28.Ra1 Qf6 29.Ra2 Ra2 30.Nf4 Qa1 (30...Re8 31.Bf3–+) 31.Kg2 Re8 32.Nf5 Ree2 33.Nh6 Kg7 34.Nf5 Kf6 35.Ne2 Re2 36.g4 (36.Nd4 Qd4 37.g4 Qf2 38.Kh3 Qh2) 36…Qe1 (36...Qe1 37.g5 Kf5 38.Kh3 Qg1 39.g6 Qg4) 0–1. alt20 – enneisirap, lichess.org, 2016.

4.b5 e6 5.Nf3 Bb7 6.c4 a6 7.Qa4 ab5 8.Qc2? (better 8.Qb5!? Bc6 9.Qg5=) 8...Ra1–/+ 9.Ba1 bc4 10.Qc4 Nc6 11.Nc3 d5 12.Qb3 Qa8 13.Bb2 Na5 14.Qb5 (14.Qa4 Bc6 15.Nb5 Bb5 16.Qb5 c6–/+) 14...c6 15.Qa4 Nc4 16.Qa8 Ba8 17.Na4 (17.Ba1!?–/+) 17...Nb2–+ 18.Nb2 Bd6 19.e3 (19.d4 c5 20.dc5 Bc5–+) 19...0–0 (19...c5 20.Ba6–+) 20.Be2 Rb8 21.Nd3 (21.Nd1 c5–+) 21...Rb1 22.Bd1 c5 23.0–0 (23.Ke2 Bb7 24.Rf1 Ba6–+) 23...c4 24.Nf4 Bf4 (24...e5!? 25.Ne2 Rb2 26.Nc3–+) 25.ef4 Ne4 (better 25...Rb2!? 26.Be2–+) 26.Bc2 Rf1 27.Kf1 Nc5 28.Ng5 h6 29.Nf3 f6 30.Nd4 Kf7 31.Ke2 e5 32.fe5 fe5 33.Nb5 Ke6?? (better 33...Bc6 34.Nd6 Ke6–+) 34.Nc7+= Kd6 35.Na8 d4? (better 35...Kc6 36.Bg6 Na6=) 36.Bg6+– d3 (36...Ne6 37.Bf5 Nf4 38.Kf3+–) 37.Kf3 Nb3 38.Ke3 Kd5 (38...Kc6 39.Bf7 Kc5 40.Nc7+–) 39.Nc7 Kd6 40.Ne8 Ke7 41.Ng7 (41.g3 Nd4+–) 41...Kf6 42.Bd3! cd3 43.Nh5 Kg5 44.Ng3 Nc5?? (44...Kf6 45.Kd3 Ke6 46.Ne2+–) 45.f3 (better 45.Ne4 Ne4 46.Ke4 Kf6+–) 45...h5?? (45...Kg6+–) 46.Ne4 Ne4 47.Ke4 Kf6 48.Kd3 Kf5 49.g3 Kg5 50.Ke4 Kf6 51.h4 Ke6 52.d3 Kf6 53.Kd5 Kf5 54.Kd6 Kf6 55.Kd7 (better 55.g4 Kg7+–) 55...Kf5 56.Ke7 Kg6 57.Ke6 e4 58.de4 Kg7 59.Kf5 Kf7 60.e5 Ke7 61.f4 Kf7 62.Kg5 Ke6 63.Kh5 Kf5 64.g4 Kf4 65.e6 Ke5 66.e7 Kf6 (66...Kd6 67.e8Q Kd5 68.g5 Kd4 69.g6 Kd3 70.g7 Kc4 71.g8Q Kd4 72.Qb3 Kc5 73.Qe5 Kc6 74.Qbb5) 67.e8Q Kg7 68.Qe6 (68.Qe7 Kg8 69.Kg6 Kh8 70.Qd8) 68...Kf8 69.Qd7 Kg8 70.Kg6 Kf8 (70...Kh8 71.Qe8) 71.Qd8 1–0. AvImd – maia5 (1700), lichess.org, 2021.

4.c4 Bb7 5.Nf3 e6 6.b5 c6 7.Nc3 a6 8.Ra4 ab5 9.Ra8 Ba8 10.cb5 cb5 11.Nb5 Bc6 12.e3 Be7 13.Nfd4 Bb7 14.Qc1 0–0? 15.Be2 (15.Qc7 Qc7 16.Nc7 Rc8+=) 15...Nc6 (15...Bg2!? 16.Rg1 Bb7–/+) 16.Nc6 Bc6 17.Nd4 (better is 17.0–0!?+=) 17...Bg2–/+ 18.Rg1 Bh3 (18...Bd5 19.Nb5–/+) 19.Nf3 (19.Rg3 Bf5+=) 19...g6 20.Ng5 Bf5 21.e4? (better is 21.Nf3!?–/+) 21...Ne4–+ 22.Ne4 Be4 23.Qc3 f6 24.h4 Bf5 25.h5 Kg7 26.hg6 hg6 27.Bh5? (27.Bd3 Qa8–+) 27...Rh8 (27...Qb8 28.Bd1–+) 28.Bg6? (better is 28.Bg4–+) 28...Bg6 29.Rg6 (29.Qg3 Qe8 30.Bd4–+) 29...Kg6 30.Qg3 Kf7 0–1. Ducato – Fournier,Frederic, Partie evaluee, 5m + 0s, 2007.

4.c4 e6 5.Qa4 Bb7 6.Nc3 Be7 7.Nf3 0–0? 8.e3 a6 9.d4 d6 10.Rd1 Nbd7 11.c5 c6 12.Bd3 a5 13.cd6 Bd6 14.b5 Qb6 15.Nd2 Bb4 16.0–0? c5 17.Nc4 Qc7 18.Qc2 (18.Ne2 cd4 19.Bd4 e5=) 18...cd4+= 19.ed4 Qf4 20.Ne2 Qg4 21.f3 Qg5 22.Ne5 Rfc8 23.Qb3 Ne5 24.de5 Nd5 25.Be4 Rc7 (better is 25...Bc5!? 26.Bd4 Qe5 27.Bc5 Rc5–/+) 26.Bd4= Rac8 27.Qd3 h5 28.f4 Qd8 29.f5 Bc5 30.Qh3 Qg5 31.fe6 Bd4 32.Nd4 Qe3 33.Qe3 Ne3 34.Bb7 Rb7 35.ef7 Rf7 ½–½. Robeson,Christian – Fournier,Frederic, Train France, 2000.

4.c4 e6 5.Qa4 Bb7 6.Nf3 c5 7.b5 Qb6 8.Nc3 Be7 9.Qc2 0–0? 10.Na4 Qc7 11.d3 d5 12.Be5 Qa5 13.Bc3 Qd8 14.Be5 Nbd7 15.g3? (better is 15.Bb2!?+=) 15...Ne5 16.Ne5 dc4 17.f3 Qa5 18.Kf2 Qb5 19.Rb1 cd3 (19...Qa6 20.Qc4 Bd6 21.Qa6 Ba6–/+) 20.Nd3?? (better is 20.ed3 Qa6 21.d4=) 20...Qc6–+ 21.Nac5 Rfc8 (21...Rfc8 22.Qc1 Bc5 23.Nc5 Rab8–+ (worse is 23...Qc5 24.Qc5 Rc5 25.Rb7–/+)) 0–1. Robeson Christian – Fournier,Frederic, Train France, 1999.

4.c4 e6 5.Ra4 Bb7 6.e3 a6 7.Nf3 Nc6 8.c5 Be7 9.d4 0–0 10.Bd3 Nd5 11.Ba3 f5 12.0–0 Qe8 13.Bc4 Nd8 14.Qb3 d6 15.Nbd2 Qg6 16.Rc1 h5 17.Ra5 h4 18.h3 Nf7 19.Bd3 1–0. Bonetti,Shane M (1930) – Fournier,Frederic (2095), Cup XX–years Chess Club MDK Malbork Poland, 2003.

4.c4 e6 5.Ra4 Be7 6.d4 (6.e4 d6= (6...Ne4 7.Qg4 Nf6 8.Qg7 Rg8 9.Qh6 Rg6 10.Qe3 Bb7) A) 7.Nf3 0–0 8.Nc3 c5 9.b5 Bb7 10.Bd3 a6; B) 7.Bd3 0–0 (7...Bd7 8.b5 a6 9.Nf3 0–0 10.0–0 c6) 8.Ne2 Bd7 9.b5 a6 10.0–0 c6; C) 7.Nc3 c5 8.bc5 dc5 9.e5 Nfd7 10.Qf3 Nb6; 6.e3 d5 A) 7.Nf3 Bd7 8.cd5 ed5 9.b5 c5 10.Ne5 Bf5; B) 7.Qf3 Bd7 (7...c6 8.Qg3 0–0 9.Be5 Nh5 10.Qh3 Nd7; 7...Bb7 8.c5 Qd7 9.Nc3 Ne4 10.Ra3 Bf6) 8.b5 c6 9.Be5 a5 10.Nc3 0–0; C) 7.Bf6 Bf6 8.d4 Bd7 9.Ra2 Qe7 10.Qd2 Nc6; 6.Nf3 A) 6...0–0 7.e3 d5 (7...Bb7 8.Bf6 Bf6 9.d4 d6 10.Bd3 c5) 8.Bf6 Bf6 9.d4 Bd7 10.b5 c6; B) 6...Bb7 7.e3 0–0 8.Bf6 Bf6 9.d4 d6 10.Bd3 c5; C) 6...d5 7.e3 (7.Ne5 Bb7 8.cd5 Qd5 9.Ra5 Qd6 10.Qa4 Nbd7) 7...Bd7 8.cd5 ed5 9.b5 c5 10.Bf6 Bf6) 6...0–0 (6...d5 A) 7.e3 dc4 (7...Bd7 8.b5 dc4 9.Bc4 c6 10.Nc3 cb5) 8.Bc4 Nbd7 9.Bc3 Nb6 10.Bb5 Bd7; B) 7.c5 Bd7 8.Ra3 a6 9.e3 Nc6 10.Qb3 Qb8) 7.Nf3 (7.e3 d5= (7...Bb7 8.Nf3 a6 9.Ba3 Bc6 10.Ra5 Bf3) 8.c5 Ne4 9.Nd2 f5 0.Ngf3 Bf6; 7.Nc3 d5 (7...Bb7 8.e3 Nc6 9.Qb3 a6 10.f3 Qb8) 8.c5 a6 9.Nf3 Bd7 0.b5 Ne4) 7...c6 (7...d5 8.e3= (8.c5 Bd7 9.Ra1 a6 10.e3 Nc6) 8...dc4 9.Bc4 Nbd7 10.Qb3 Nb6; 7...Bb7 8.e3 a6 9.Bd3 Bc6 10.b5 ab5) 8.e3+= Bb7 (8...a5 9.ba5 Ra5 10.Bd3 d5) 9.Nc3 (9.Bd3 a5 10.ba5 Ra5) 9...Qc7 (9...a5 10.c5= (10.Ra5 Ra5) 10...ab4) 10.e4 (10.Qa1 a6+=) 10...g6 (10...d5!? 11.e5 Nfd7+=) 11.e5 Ne8 12.Bd3 d5 13.0–0 (13.c5 a5+/–) 13...a6 (13...dc4!? 14.Bc4 Nd7+=) 14.c5 Nd7 15.Bc1 ½–½. Woschkat,Karl_Heinz – Mueller,Bernd, THT (year?).

4.c4 e6 5.Ra4 g6 6.e3 (better is 6.e4 Bb7 A) 7.d3 Bg7 (7...a6 8.Qd2 d6 9.Be2 c5 10.Nf3 Bc6; 7...d6 8.Nf3 Bg7 9.Be2 c5 10.Nc3 Nbd7) 8.Nf3 d6 9.Be2 c5 10.0–0 Nbd7; B) 7.e5+/– Nh5 8.Nf3 Bg7 9.d4 f6 10.Nbd2 0–0) 6...c5?? (better is 6...Bb7+= A) 7.d4 a6 8.c5 Bg7 9.Nf3 Bc6 10.Ra5 0–0; B) 7.Nf3 a6 (7...c5 8.Na3 d6 9.Nb5 Nbd7 10.bc5 Nc5; 7...Nc6 8.Bc3 a6 9.Be2 Bg7 10.0–0 0–0) 8.Bc3 Bg7 9.d4 0–0 10.Be2 d6; C) 7.Na3 a6 (7...Bc6 8.b5 Bb7 9.Qa1 Be7 10.Nc2 a6; 7...Bg7 8.Nf3 d6 9.d4 0–0 10.Bd3 c5) 8.Nf3 Be7 9.Be2 0–0 10.Nc2 c5; D) 7.Nc3 a6 8.c5 Bg7 9.Nf3 0–0 10.d4 Bc6) 7.Qf3+– d5 8.Bf6 (worse is 8.Qf6 Qf6 9.Bf6 Rg8 10.bc5 Nd7+–) 8...Be7 (8...Qd7 9.b5 Rg8+–) 9.Bh8 Bd7 (9...cb4